X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/1c8fbe329dc85ae06599c20a9d385e3af396d380..b0711f5f3ae510936893c408cd45f25c101a46f1:/vendor/assets/iD/iD.js

diff --git a/vendor/assets/iD/iD.js b/vendor/assets/iD/iD.js
index 3ce4ca9be..af0d06f98 100644
--- a/vendor/assets/iD/iD.js
+++ b/vendor/assets/iD/iD.js
@@ -1,3223 +1,3134 @@
 (function () {
+
 	var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
 
+	function getDefaultExportFromCjs (x) {
+		return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
+	}
+
 	function createCommonjsModule(fn, basedir, module) {
 		return module = {
-		  path: basedir,
-		  exports: {},
-		  require: function (path, base) {
-	      return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
-	    }
+			path: basedir,
+			exports: {},
+			require: function (path, base) {
+				return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
+			}
 		}, fn(module, module.exports), module.exports;
 	}
 
-	function getCjsExportFromNamespace (n) {
-		return n && n['default'] || n;
-	}
-
 	function commonjsRequire () {
 		throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');
 	}
 
-	var isImplemented = function () {
-		var set, iterator, result;
-		if (typeof Set !== 'function') { return false; }
-		set = new Set(['raz', 'dwa', 'trzy']);
-		if (String(set) !== '[object Set]') { return false; }
-		if (set.size !== 3) { return false; }
-		if (typeof set.add !== 'function') { return false; }
-		if (typeof set.clear !== 'function') { return false; }
-		if (typeof set.delete !== 'function') { return false; }
-		if (typeof set.entries !== 'function') { return false; }
-		if (typeof set.forEach !== 'function') { return false; }
-		if (typeof set.has !== 'function') { return false; }
-		if (typeof set.keys !== 'function') { return false; }
-		if (typeof set.values !== 'function') { return false; }
-
-		iterator = set.values();
-		result = iterator.next();
-		if (result.done !== false) { return false; }
-		if (result.value !== 'raz') { return false; }
-
-		return true;
+	var check = function (it) {
+	  return it && it.Math == Math && it;
 	};
 
-	// eslint-disable-next-line no-empty-function
-	var noop = function () {};
-
-	var _undefined = noop(); // Support ES3 engines
+	// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
+	var global_1 =
+	  // eslint-disable-next-line no-undef
+	  check(typeof globalThis == 'object' && globalThis) ||
+	  check(typeof window == 'object' && window) ||
+	  check(typeof self == 'object' && self) ||
+	  check(typeof commonjsGlobal == 'object' && commonjsGlobal) ||
+	  // eslint-disable-next-line no-new-func
+	  Function('return this')();
 
-	var isValue = function (val) { return val !== _undefined && val !== null; };
-
-	var validValue = function (value) {
-		if (!isValue(value)) { throw new TypeError("Cannot use null or undefined"); }
-		return value;
+	var fails = function (exec) {
+	  try {
+	    return !!exec();
+	  } catch (error) {
+	    return true;
+	  }
 	};
 
-	var clear = function () {
-		validValue(this).length = 0;
-		return this;
-	};
+	// Thank's IE8 for his funny defineProperty
+	var descriptors = !fails(function () {
+	  return Object.defineProperty({}, 1, { get: function () { return 7; } })[1] != 7;
+	});
 
-	var isImplemented$1 = function () {
-		var numberIsNaN = Number.isNaN;
-		if (typeof numberIsNaN !== "function") { return false; }
-		return !numberIsNaN({}) && numberIsNaN(NaN) && !numberIsNaN(34);
-	};
+	var nativePropertyIsEnumerable = {}.propertyIsEnumerable;
+	var getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
 
-	var shim = function (value) {
-		// eslint-disable-next-line no-self-compare
-		return value !== value;
-	};
+	// Nashorn ~ JDK8 bug
+	var NASHORN_BUG = getOwnPropertyDescriptor && !nativePropertyIsEnumerable.call({ 1: 2 }, 1);
 
-	var isNan = isImplemented$1() ? Number.isNaN : shim;
+	// `Object.prototype.propertyIsEnumerable` method implementation
+	// https://tc39.github.io/ecma262/#sec-object.prototype.propertyisenumerable
+	var f = NASHORN_BUG ? function propertyIsEnumerable(V) {
+	  var descriptor = getOwnPropertyDescriptor(this, V);
+	  return !!descriptor && descriptor.enumerable;
+	} : nativePropertyIsEnumerable;
 
-	var isImplemented$2 = function () {
-		var sign = Math.sign;
-		if (typeof sign !== "function") { return false; }
-		return sign(10) === 1 && sign(-20) === -1;
+	var objectPropertyIsEnumerable = {
+		f: f
 	};
 
-	var shim$1 = function (value) {
-		value = Number(value);
-		if (isNaN(value) || value === 0) { return value; }
-		return value > 0 ? 1 : -1;
+	var createPropertyDescriptor = function (bitmap, value) {
+	  return {
+	    enumerable: !(bitmap & 1),
+	    configurable: !(bitmap & 2),
+	    writable: !(bitmap & 4),
+	    value: value
+	  };
 	};
 
-	var sign = isImplemented$2() ? Math.sign : shim$1;
-
-	var abs   = Math.abs
-	  , floor = Math.floor;
+	var toString = {}.toString;
 
-	var toInteger = function (value) {
-		if (isNaN(value)) { return 0; }
-		value = Number(value);
-		if (value === 0 || !isFinite(value)) { return value; }
-		return sign(value) * floor(abs(value));
+	var classofRaw = function (it) {
+	  return toString.call(it).slice(8, -1);
 	};
 
-	var max       = Math.max;
-
-	var toPosInteger = function (value) { return max(0, toInteger(value)); };
-
-	var indexOf           = Array.prototype.indexOf
-	  , objHasOwnProperty = Object.prototype.hasOwnProperty
-	  , abs$1               = Math.abs
-	  , floor$1             = Math.floor;
-
-	var eIndexOf = function (searchElement/*, fromIndex*/) {
-		var i, length, fromIndex, val;
-		if (!isNan(searchElement)) { return indexOf.apply(this, arguments); }
-
-		length = toPosInteger(validValue(this).length);
-		fromIndex = arguments[1];
-		if (isNaN(fromIndex)) { fromIndex = 0; }
-		else if (fromIndex >= 0) { fromIndex = floor$1(fromIndex); }
-		else { fromIndex = toPosInteger(this.length) - floor$1(abs$1(fromIndex)); }
+	var split = ''.split;
 
-		for (i = fromIndex; i < length; ++i) {
-			if (objHasOwnProperty.call(this, i)) {
-				val = this[i];
-				if (isNan(val)) { return i; } // Jslint: ignore
-			}
-		}
-		return -1;
-	};
+	// fallback for non-array-like ES3 and non-enumerable old V8 strings
+	var indexedObject = fails(function () {
+	  // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346
+	  // eslint-disable-next-line no-prototype-builtins
+	  return !Object('z').propertyIsEnumerable(0);
+	}) ? function (it) {
+	  return classofRaw(it) == 'String' ? split.call(it, '') : Object(it);
+	} : Object;
 
-	var create = Object.create, getPrototypeOf = Object.getPrototypeOf, plainObject = {};
-
-	var isImplemented$3 = function (/* CustomCreate*/) {
-		var setPrototypeOf = Object.setPrototypeOf, customCreate = arguments[0] || create;
-		if (typeof setPrototypeOf !== "function") { return false; }
-		return getPrototypeOf(setPrototypeOf(customCreate(null), plainObject)) === plainObject;
+	// `RequireObjectCoercible` abstract operation
+	// https://tc39.github.io/ecma262/#sec-requireobjectcoercible
+	var requireObjectCoercible = function (it) {
+	  if (it == undefined) throw TypeError("Can't call method on " + it);
+	  return it;
 	};
 
-	var map = { function: true, object: true };
-
-	var isObject = function (value) { return (isValue(value) && map[typeof value]) || false; };
-
-	var create$1 = Object.create, shim$2;
-
-	if (!isImplemented$3()) {
-		shim$2 = shim$3;
-	}
-
-	var create_1 = (function () {
-		var nullObject, polyProps, desc;
-		if (!shim$2) { return create$1; }
-		if (shim$2.level !== 1) { return create$1; }
+	// toObject with fallback for non-array-like ES3 strings
 
-		nullObject = {};
-		polyProps = {};
-		desc = { configurable: false, enumerable: false, writable: true, value: undefined };
-		Object.getOwnPropertyNames(Object.prototype).forEach(function (name) {
-			if (name === "__proto__") {
-				polyProps[name] = {
-					configurable: true,
-					enumerable: false,
-					writable: true,
-					value: undefined
-				};
-				return;
-			}
-			polyProps[name] = desc;
-		});
-		Object.defineProperties(nullObject, polyProps);
-
-		Object.defineProperty(shim$2, "nullPolyfill", {
-			configurable: false,
-			enumerable: false,
-			writable: false,
-			value: nullObject
-		});
-
-		return function (prototype, props) {
-			return create$1(prototype === null ? nullObject : prototype, props);
-		};
-	})();
 
-	var objIsPrototypeOf = Object.prototype.isPrototypeOf
-	  , defineProperty   = Object.defineProperty
-	  , nullDesc         = { configurable: true, enumerable: false, writable: true, value: undefined }
-	  , validate;
 
-	validate = function (obj, prototype) {
-		validValue(obj);
-		if (prototype === null || isObject(prototype)) { return obj; }
-		throw new TypeError("Prototype must be null or an object");
+	var toIndexedObject = function (it) {
+	  return indexedObject(requireObjectCoercible(it));
 	};
 
-	var shim$3 = (function (status) {
-		var fn, set;
-		if (!status) { return null; }
-		if (status.level === 2) {
-			if (status.set) {
-				set = status.set;
-				fn = function (obj, prototype) {
-					set.call(validate(obj, prototype), prototype);
-					return obj;
-				};
-			} else {
-				fn = function (obj, prototype) {
-					validate(obj, prototype).__proto__ = prototype;
-					return obj;
-				};
-			}
-		} else {
-			fn = function self(obj, prototype) {
-				var isNullBase;
-				validate(obj, prototype);
-				isNullBase = objIsPrototypeOf.call(self.nullPolyfill, obj);
-				if (isNullBase) { delete self.nullPolyfill.__proto__; }
-				if (prototype === null) { prototype = self.nullPolyfill; }
-				obj.__proto__ = prototype;
-				if (isNullBase) { defineProperty(self.nullPolyfill, "__proto__", nullDesc); }
-				return obj;
-			};
-		}
-		return Object.defineProperty(fn, "level", {
-			configurable: false,
-			enumerable: false,
-			writable: false,
-			value: status.level
-		});
-	})(
-		(function () {
-			var tmpObj1 = Object.create(null)
-			  , tmpObj2 = {}
-			  , set
-			  , desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
-
-			if (desc) {
-				try {
-					set = desc.set; // Opera crashes at this point
-					set.call(tmpObj1, tmpObj2);
-				} catch (ignore) {}
-				if (Object.getPrototypeOf(tmpObj1) === tmpObj2) { return { set: set, level: 2 }; }
-			}
+	var isObject = function (it) {
+	  return typeof it === 'object' ? it !== null : typeof it === 'function';
+	};
 
-			tmpObj1.__proto__ = tmpObj2;
-			if (Object.getPrototypeOf(tmpObj1) === tmpObj2) { return { level: 2 }; }
+	// `ToPrimitive` abstract operation
+	// https://tc39.github.io/ecma262/#sec-toprimitive
+	// instead of the ES6 spec version, we didn't implement @@toPrimitive case
+	// and the second argument - flag - preferred type is a string
+	var toPrimitive = function (input, PREFERRED_STRING) {
+	  if (!isObject(input)) return input;
+	  var fn, val;
+	  if (PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;
+	  if (typeof (fn = input.valueOf) == 'function' && !isObject(val = fn.call(input))) return val;
+	  if (!PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;
+	  throw TypeError("Can't convert object to primitive value");
+	};
 
-			tmpObj1 = {};
-			tmpObj1.__proto__ = tmpObj2;
-			if (Object.getPrototypeOf(tmpObj1) === tmpObj2) { return { level: 1 }; }
+	var hasOwnProperty = {}.hasOwnProperty;
 
-			return false;
-		})()
-	);
+	var has = function (it, key) {
+	  return hasOwnProperty.call(it, key);
+	};
 
-	var setPrototypeOf = isImplemented$3() ? Object.setPrototypeOf : shim$3;
+	var document$1 = global_1.document;
+	// typeof document.createElement is 'object' in old IE
+	var EXISTS = isObject(document$1) && isObject(document$1.createElement);
 
-	var validCallable = function (fn) {
-		if (typeof fn !== "function") { throw new TypeError(fn + " is not a function"); }
-		return fn;
+	var documentCreateElement = function (it) {
+	  return EXISTS ? document$1.createElement(it) : {};
 	};
 
-	// ES3 safe
-	var _undefined$1 = void 0;
-
-	var is = function (value) { return value !== _undefined$1 && value !== null; };
+	// Thank's IE8 for his funny defineProperty
+	var ie8DomDefine = !descriptors && !fails(function () {
+	  return Object.defineProperty(documentCreateElement('div'), 'a', {
+	    get: function () { return 7; }
+	  }).a != 7;
+	});
 
-	// prettier-ignore
-	var possibleTypes = { "object": true, "function": true, "undefined": true /* document.all */ };
+	var nativeGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
 
-	var is$1 = function (value) {
-		if (!is(value)) { return false; }
-		return hasOwnProperty.call(possibleTypes, typeof value);
+	// `Object.getOwnPropertyDescriptor` method
+	// https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptor
+	var f$1 = descriptors ? nativeGetOwnPropertyDescriptor : function getOwnPropertyDescriptor(O, P) {
+	  O = toIndexedObject(O);
+	  P = toPrimitive(P, true);
+	  if (ie8DomDefine) try {
+	    return nativeGetOwnPropertyDescriptor(O, P);
+	  } catch (error) { /* empty */ }
+	  if (has(O, P)) return createPropertyDescriptor(!objectPropertyIsEnumerable.f.call(O, P), O[P]);
 	};
 
-	var is$2 = function (value) {
-		if (!is$1(value)) { return false; }
-		try {
-			if (!value.constructor) { return false; }
-			return value.constructor.prototype === value;
-		} catch (error) {
-			return false;
-		}
+	var objectGetOwnPropertyDescriptor = {
+		f: f$1
 	};
 
-	var is$3 = function (value) {
-		if (typeof value !== "function") { return false; }
-
-		if (!hasOwnProperty.call(value, "length")) { return false; }
-
-		try {
-			if (typeof value.length !== "number") { return false; }
-			if (typeof value.call !== "function") { return false; }
-			if (typeof value.apply !== "function") { return false; }
-		} catch (error) {
-			return false;
-		}
-
-		return !is$2(value);
+	var anObject = function (it) {
+	  if (!isObject(it)) {
+	    throw TypeError(String(it) + ' is not an object');
+	  } return it;
 	};
 
-	var classRe = /^\s*class[\s{/}]/, functionToString = Function.prototype.toString;
+	var nativeDefineProperty = Object.defineProperty;
 
-	var is$4 = function (value) {
-		if (!is$3(value)) { return false; }
-		if (classRe.test(functionToString.call(value))) { return false; }
-		return true;
+	// `Object.defineProperty` method
+	// https://tc39.github.io/ecma262/#sec-object.defineproperty
+	var f$2 = descriptors ? nativeDefineProperty : function defineProperty(O, P, Attributes) {
+	  anObject(O);
+	  P = toPrimitive(P, true);
+	  anObject(Attributes);
+	  if (ie8DomDefine) try {
+	    return nativeDefineProperty(O, P, Attributes);
+	  } catch (error) { /* empty */ }
+	  if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');
+	  if ('value' in Attributes) O[P] = Attributes.value;
+	  return O;
 	};
 
-	var isImplemented$4 = function () {
-		var assign = Object.assign, obj;
-		if (typeof assign !== "function") { return false; }
-		obj = { foo: "raz" };
-		assign(obj, { bar: "dwa" }, { trzy: "trzy" });
-		return obj.foo + obj.bar + obj.trzy === "razdwatrzy";
+	var objectDefineProperty = {
+		f: f$2
 	};
 
-	var isImplemented$5 = function () {
-		try {
-			Object.keys("primitive");
-			return true;
-		} catch (e) {
-			return false;
-		}
+	var createNonEnumerableProperty = descriptors ? function (object, key, value) {
+	  return objectDefineProperty.f(object, key, createPropertyDescriptor(1, value));
+	} : function (object, key, value) {
+	  object[key] = value;
+	  return object;
 	};
 
-	var keys = Object.keys;
+	var setGlobal = function (key, value) {
+	  try {
+	    createNonEnumerableProperty(global_1, key, value);
+	  } catch (error) {
+	    global_1[key] = value;
+	  } return value;
+	};
 
-	var shim$4 = function (object) { return keys(isValue(object) ? Object(object) : object); };
+	var SHARED = '__core-js_shared__';
+	var store = global_1[SHARED] || setGlobal(SHARED, {});
 
-	var keys$1 = isImplemented$5() ? Object.keys : shim$4;
+	var sharedStore = store;
 
-	var max$1   = Math.max;
+	var functionToString = Function.toString;
 
-	var shim$5 = function (dest, src/*, …srcn*/) {
-		var arguments$1 = arguments;
+	// this helper broken in `3.4.1-3.4.4`, so we can't use `shared` helper
+	if (typeof sharedStore.inspectSource != 'function') {
+	  sharedStore.inspectSource = function (it) {
+	    return functionToString.call(it);
+	  };
+	}
 
-		var error, i, length = max$1(arguments.length, 2), assign;
-		dest = Object(validValue(dest));
-		assign = function (key) {
-			try {
-				dest[key] = src[key];
-			} catch (e) {
-				if (!error) { error = e; }
-			}
-		};
-		for (i = 1; i < length; ++i) {
-			src = arguments$1[i];
-			keys$1(src).forEach(assign);
-		}
-		if (error !== undefined) { throw error; }
-		return dest;
-	};
+	var inspectSource = sharedStore.inspectSource;
 
-	var assign = isImplemented$4() ? Object.assign : shim$5;
+	var WeakMap = global_1.WeakMap;
 
-	var forEach = Array.prototype.forEach, create$2 = Object.create;
+	var nativeWeakMap = typeof WeakMap === 'function' && /native code/.test(inspectSource(WeakMap));
 
-	var process$1 = function (src, obj) {
-		var key;
-		for (key in src) { obj[key] = src[key]; }
-	};
+	var isPure = false;
 
-	// eslint-disable-next-line no-unused-vars
-	var normalizeOptions = function (opts1/*, …options*/) {
-		var result = create$2(null);
-		forEach.call(arguments, function (options) {
-			if (!isValue(options)) { return; }
-			process$1(Object(options), result);
-		});
-		return result;
-	};
+	var shared = createCommonjsModule(function (module) {
+	(module.exports = function (key, value) {
+	  return sharedStore[key] || (sharedStore[key] = value !== undefined ? value : {});
+	})('versions', []).push({
+	  version: '3.6.5',
+	  mode:  'global',
+	  copyright: '© 2020 Denis Pushkarev (zloirock.ru)'
+	});
+	});
 
-	var str = "razdwatrzy";
+	var id = 0;
+	var postfix = Math.random();
 
-	var isImplemented$6 = function () {
-		if (typeof str.contains !== "function") { return false; }
-		return str.contains("dwa") === true && str.contains("foo") === false;
+	var uid = function (key) {
+	  return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id + postfix).toString(36);
 	};
 
-	var indexOf$1 = String.prototype.indexOf;
+	var keys = shared('keys');
 
-	var shim$6 = function (searchString/*, position*/) {
-		return indexOf$1.call(this, searchString, arguments[1]) > -1;
+	var sharedKey = function (key) {
+	  return keys[key] || (keys[key] = uid(key));
 	};
 
-	var contains = isImplemented$6() ? String.prototype.contains : shim$6;
-
-	var d_1 = createCommonjsModule(function (module) {
+	var hiddenKeys = {};
 
+	var WeakMap$1 = global_1.WeakMap;
+	var set, get, has$1;
 
+	var enforce = function (it) {
+	  return has$1(it) ? get(it) : set(it, {});
+	};
 
-	var d = (module.exports = function (dscr, value/*, options*/) {
-		var c, e, w, options, desc;
-		if (arguments.length < 2 || typeof dscr !== "string") {
-			options = value;
-			value = dscr;
-			dscr = null;
-		} else {
-			options = arguments[2];
-		}
-		if (is(dscr)) {
-			c = contains.call(dscr, "c");
-			e = contains.call(dscr, "e");
-			w = contains.call(dscr, "w");
-		} else {
-			c = w = true;
-			e = false;
-		}
+	var getterFor = function (TYPE) {
+	  return function (it) {
+	    var state;
+	    if (!isObject(it) || (state = get(it)).type !== TYPE) {
+	      throw TypeError('Incompatible receiver, ' + TYPE + ' required');
+	    } return state;
+	  };
+	};
 
-		desc = { value: value, configurable: c, enumerable: e, writable: w };
-		return !options ? desc : assign(normalizeOptions(options), desc);
-	});
+	if (nativeWeakMap) {
+	  var store$1 = new WeakMap$1();
+	  var wmget = store$1.get;
+	  var wmhas = store$1.has;
+	  var wmset = store$1.set;
+	  set = function (it, metadata) {
+	    wmset.call(store$1, it, metadata);
+	    return metadata;
+	  };
+	  get = function (it) {
+	    return wmget.call(store$1, it) || {};
+	  };
+	  has$1 = function (it) {
+	    return wmhas.call(store$1, it);
+	  };
+	} else {
+	  var STATE = sharedKey('state');
+	  hiddenKeys[STATE] = true;
+	  set = function (it, metadata) {
+	    createNonEnumerableProperty(it, STATE, metadata);
+	    return metadata;
+	  };
+	  get = function (it) {
+	    return has(it, STATE) ? it[STATE] : {};
+	  };
+	  has$1 = function (it) {
+	    return has(it, STATE);
+	  };
+	}
 
-	d.gs = function (dscr, get, set/*, options*/) {
-		var c, e, options, desc;
-		if (typeof dscr !== "string") {
-			options = set;
-			set = get;
-			get = dscr;
-			dscr = null;
-		} else {
-			options = arguments[3];
-		}
-		if (!is(get)) {
-			get = undefined;
-		} else if (!is$4(get)) {
-			options = get;
-			get = set = undefined;
-		} else if (!is(set)) {
-			set = undefined;
-		} else if (!is$4(set)) {
-			options = set;
-			set = undefined;
-		}
-		if (is(dscr)) {
-			c = contains.call(dscr, "c");
-			e = contains.call(dscr, "e");
-		} else {
-			c = true;
-			e = false;
-		}
-
-		desc = { get: get, set: set, configurable: c, enumerable: e };
-		return !options ? desc : assign(normalizeOptions(options), desc);
+	var internalState = {
+	  set: set,
+	  get: get,
+	  has: has$1,
+	  enforce: enforce,
+	  getterFor: getterFor
 	};
-	});
 
-	var eventEmitter = createCommonjsModule(function (module, exports) {
+	var redefine = createCommonjsModule(function (module) {
+	var getInternalState = internalState.get;
+	var enforceInternalState = internalState.enforce;
+	var TEMPLATE = String(String).split('String');
 
-	var apply = Function.prototype.apply, call = Function.prototype.call
-	  , create = Object.create, defineProperty = Object.defineProperty
-	  , defineProperties = Object.defineProperties
-	  , hasOwnProperty = Object.prototype.hasOwnProperty
-	  , descriptor = { configurable: true, enumerable: false, writable: true }
+	(module.exports = function (O, key, value, options) {
+	  var unsafe = options ? !!options.unsafe : false;
+	  var simple = options ? !!options.enumerable : false;
+	  var noTargetGet = options ? !!options.noTargetGet : false;
+	  if (typeof value == 'function') {
+	    if (typeof key == 'string' && !has(value, 'name')) createNonEnumerableProperty(value, 'name', key);
+	    enforceInternalState(value).source = TEMPLATE.join(typeof key == 'string' ? key : '');
+	  }
+	  if (O === global_1) {
+	    if (simple) O[key] = value;
+	    else setGlobal(key, value);
+	    return;
+	  } else if (!unsafe) {
+	    delete O[key];
+	  } else if (!noTargetGet && O[key]) {
+	    simple = true;
+	  }
+	  if (simple) O[key] = value;
+	  else createNonEnumerableProperty(O, key, value);
+	// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative
+	})(Function.prototype, 'toString', function toString() {
+	  return typeof this == 'function' && getInternalState(this).source || inspectSource(this);
+	});
+	});
 
-	  , on, once, off, emit, methods, descriptors, base;
+	var path = global_1;
 
-	on = function (type, listener) {
-		var data;
+	var aFunction = function (variable) {
+	  return typeof variable == 'function' ? variable : undefined;
+	};
 
-		validCallable(listener);
+	var getBuiltIn = function (namespace, method) {
+	  return arguments.length < 2 ? aFunction(path[namespace]) || aFunction(global_1[namespace])
+	    : path[namespace] && path[namespace][method] || global_1[namespace] && global_1[namespace][method];
+	};
 
-		if (!hasOwnProperty.call(this, '__ee__')) {
-			data = descriptor.value = create(null);
-			defineProperty(this, '__ee__', descriptor);
-			descriptor.value = null;
-		} else {
-			data = this.__ee__;
-		}
-		if (!data[type]) { data[type] = listener; }
-		else if (typeof data[type] === 'object') { data[type].push(listener); }
-		else { data[type] = [data[type], listener]; }
+	var ceil = Math.ceil;
+	var floor = Math.floor;
 
-		return this;
+	// `ToInteger` abstract operation
+	// https://tc39.github.io/ecma262/#sec-tointeger
+	var toInteger = function (argument) {
+	  return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor : ceil)(argument);
 	};
 
-	once = function (type, listener) {
-		var once, self;
-
-		validCallable(listener);
-		self = this;
-		on.call(this, type, once = function () {
-			off.call(self, type, once);
-			apply.call(listener, this, arguments);
-		});
+	var min = Math.min;
 
-		once.__eeOnceListener__ = listener;
-		return this;
+	// `ToLength` abstract operation
+	// https://tc39.github.io/ecma262/#sec-tolength
+	var toLength = function (argument) {
+	  return argument > 0 ? min(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
 	};
 
-	off = function (type, listener) {
-		var data, listeners, candidate, i;
-
-		validCallable(listener);
+	var max = Math.max;
+	var min$1 = Math.min;
 
-		if (!hasOwnProperty.call(this, '__ee__')) { return this; }
-		data = this.__ee__;
-		if (!data[type]) { return this; }
-		listeners = data[type];
+	// Helper for a popular repeating case of the spec:
+	// Let integer be ? ToInteger(index).
+	// If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).
+	var toAbsoluteIndex = function (index, length) {
+	  var integer = toInteger(index);
+	  return integer < 0 ? max(integer + length, 0) : min$1(integer, length);
+	};
 
-		if (typeof listeners === 'object') {
-			for (i = 0; (candidate = listeners[i]); ++i) {
-				if ((candidate === listener) ||
-						(candidate.__eeOnceListener__ === listener)) {
-					if (listeners.length === 2) { data[type] = listeners[i ? 0 : 1]; }
-					else { listeners.splice(i, 1); }
-				}
-			}
-		} else {
-			if ((listeners === listener) ||
-					(listeners.__eeOnceListener__ === listener)) {
-				delete data[type];
-			}
-		}
+	// `Array.prototype.{ indexOf, includes }` methods implementation
+	var createMethod = function (IS_INCLUDES) {
+	  return function ($this, el, fromIndex) {
+	    var O = toIndexedObject($this);
+	    var length = toLength(O.length);
+	    var index = toAbsoluteIndex(fromIndex, length);
+	    var value;
+	    // Array#includes uses SameValueZero equality algorithm
+	    // eslint-disable-next-line no-self-compare
+	    if (IS_INCLUDES && el != el) while (length > index) {
+	      value = O[index++];
+	      // eslint-disable-next-line no-self-compare
+	      if (value != value) return true;
+	    // Array#indexOf ignores holes, Array#includes - not
+	    } else for (;length > index; index++) {
+	      if ((IS_INCLUDES || index in O) && O[index] === el) return IS_INCLUDES || index || 0;
+	    } return !IS_INCLUDES && -1;
+	  };
+	};
 
-		return this;
+	var arrayIncludes = {
+	  // `Array.prototype.includes` method
+	  // https://tc39.github.io/ecma262/#sec-array.prototype.includes
+	  includes: createMethod(true),
+	  // `Array.prototype.indexOf` method
+	  // https://tc39.github.io/ecma262/#sec-array.prototype.indexof
+	  indexOf: createMethod(false)
 	};
 
-	emit = function (type) {
-		var arguments$1 = arguments;
+	var indexOf = arrayIncludes.indexOf;
 
-		var i, l, listener, listeners, args;
 
-		if (!hasOwnProperty.call(this, '__ee__')) { return; }
-		listeners = this.__ee__[type];
-		if (!listeners) { return; }
+	var objectKeysInternal = function (object, names) {
+	  var O = toIndexedObject(object);
+	  var i = 0;
+	  var result = [];
+	  var key;
+	  for (key in O) !has(hiddenKeys, key) && has(O, key) && result.push(key);
+	  // Don't enum bug & hidden keys
+	  while (names.length > i) if (has(O, key = names[i++])) {
+	    ~indexOf(result, key) || result.push(key);
+	  }
+	  return result;
+	};
 
-		if (typeof listeners === 'object') {
-			l = arguments.length;
-			args = new Array(l - 1);
-			for (i = 1; i < l; ++i) { args[i - 1] = arguments$1[i]; }
+	// IE8- don't enum bug keys
+	var enumBugKeys = [
+	  'constructor',
+	  'hasOwnProperty',
+	  'isPrototypeOf',
+	  'propertyIsEnumerable',
+	  'toLocaleString',
+	  'toString',
+	  'valueOf'
+	];
 
-			listeners = listeners.slice();
-			for (i = 0; (listener = listeners[i]); ++i) {
-				apply.call(listener, this, args);
-			}
-		} else {
-			switch (arguments.length) {
-			case 1:
-				call.call(listeners, this);
-				break;
-			case 2:
-				call.call(listeners, this, arguments[1]);
-				break;
-			case 3:
-				call.call(listeners, this, arguments[1], arguments[2]);
-				break;
-			default:
-				l = arguments.length;
-				args = new Array(l - 1);
-				for (i = 1; i < l; ++i) {
-					args[i - 1] = arguments$1[i];
-				}
-				apply.call(listeners, this, args);
-			}
-		}
-	};
+	var hiddenKeys$1 = enumBugKeys.concat('length', 'prototype');
 
-	methods = {
-		on: on,
-		once: once,
-		off: off,
-		emit: emit
+	// `Object.getOwnPropertyNames` method
+	// https://tc39.github.io/ecma262/#sec-object.getownpropertynames
+	var f$3 = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
+	  return objectKeysInternal(O, hiddenKeys$1);
 	};
 
-	descriptors = {
-		on: d_1(on),
-		once: d_1(once),
-		off: d_1(off),
-		emit: d_1(emit)
+	var objectGetOwnPropertyNames = {
+		f: f$3
 	};
 
-	base = defineProperties({}, descriptors);
+	var f$4 = Object.getOwnPropertySymbols;
 
-	module.exports = exports = function (o) {
-		return (o == null) ? create(base) : defineProperties(Object(o), descriptors);
+	var objectGetOwnPropertySymbols = {
+		f: f$4
 	};
-	exports.methods = methods;
-	});
-
-	var validTypes = { object: true, symbol: true };
-
-	var isImplemented$7 = function () {
-		var symbol;
-		if (typeof Symbol !== 'function') { return false; }
-		symbol = Symbol('test symbol');
-		try { String(symbol); } catch (e) { return false; }
-
-		// Return 'true' also for polyfills
-		if (!validTypes[typeof Symbol.iterator]) { return false; }
-		if (!validTypes[typeof Symbol.toPrimitive]) { return false; }
-		if (!validTypes[typeof Symbol.toStringTag]) { return false; }
 
-		return true;
+	// all object keys, includes non-enumerable and symbols
+	var ownKeys = getBuiltIn('Reflect', 'ownKeys') || function ownKeys(it) {
+	  var keys = objectGetOwnPropertyNames.f(anObject(it));
+	  var getOwnPropertySymbols = objectGetOwnPropertySymbols.f;
+	  return getOwnPropertySymbols ? keys.concat(getOwnPropertySymbols(it)) : keys;
 	};
 
-	var isSymbol = function (x) {
-		if (!x) { return false; }
-		if (typeof x === 'symbol') { return true; }
-		if (!x.constructor) { return false; }
-		if (x.constructor.name !== 'Symbol') { return false; }
-		return (x[x.constructor.toStringTag] === 'Symbol');
+	var copyConstructorProperties = function (target, source) {
+	  var keys = ownKeys(source);
+	  var defineProperty = objectDefineProperty.f;
+	  var getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+	  for (var i = 0; i < keys.length; i++) {
+	    var key = keys[i];
+	    if (!has(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));
+	  }
 	};
 
-	var validateSymbol = function (value) {
-		if (!isSymbol(value)) { throw new TypeError(value + " is not a symbol"); }
-		return value;
-	};
+	var replacement = /#|\.prototype\./;
 
-	var create$3 = Object.create, defineProperties = Object.defineProperties
-	  , defineProperty$1 = Object.defineProperty, objPrototype = Object.prototype
-	  , NativeSymbol, SymbolPolyfill, HiddenSymbol, globalSymbols = create$3(null)
-	  , isNativeSafe;
-
-	if (typeof Symbol === 'function') {
-		NativeSymbol = Symbol;
-		try {
-			String(NativeSymbol());
-			isNativeSafe = true;
-		} catch (ignore) {}
-	}
-
-	var generateName = (function () {
-		var created = create$3(null);
-		return function (desc) {
-			var postfix = 0, name, ie11BugWorkaround;
-			while (created[desc + (postfix || '')]) { ++postfix; }
-			desc += (postfix || '');
-			created[desc] = true;
-			name = '@@' + desc;
-			defineProperty$1(objPrototype, name, d_1.gs(null, function (value) {
-				// For IE11 issue see:
-				// https://connect.microsoft.com/IE/feedbackdetail/view/1928508/
-				//    ie11-broken-getters-on-dom-objects
-				// https://github.com/medikoo/es6-symbol/issues/12
-				if (ie11BugWorkaround) { return; }
-				ie11BugWorkaround = true;
-				defineProperty$1(this, name, d_1(value));
-				ie11BugWorkaround = false;
-			}));
-			return name;
-		};
-	}());
-
-	// Internal constructor (not one exposed) for creating Symbol instances.
-	// This one is used to ensure that `someSymbol instanceof Symbol` always return false
-	HiddenSymbol = function Symbol(description) {
-		if (this instanceof HiddenSymbol) { throw new TypeError('Symbol is not a constructor'); }
-		return SymbolPolyfill(description);
+	var isForced = function (feature, detection) {
+	  var value = data[normalize(feature)];
+	  return value == POLYFILL ? true
+	    : value == NATIVE ? false
+	    : typeof detection == 'function' ? fails(detection)
+	    : !!detection;
 	};
 
-	// Exposed `Symbol` constructor
-	// (returns instances of HiddenSymbol)
-	var polyfill = SymbolPolyfill = function Symbol(description) {
-		var symbol;
-		if (this instanceof Symbol) { throw new TypeError('Symbol is not a constructor'); }
-		if (isNativeSafe) { return NativeSymbol(description); }
-		symbol = create$3(HiddenSymbol.prototype);
-		description = (description === undefined ? '' : String(description));
-		return defineProperties(symbol, {
-			__description__: d_1('', description),
-			__name__: d_1('', generateName(description))
-		});
+	var normalize = isForced.normalize = function (string) {
+	  return String(string).replace(replacement, '.').toLowerCase();
 	};
-	defineProperties(SymbolPolyfill, {
-		for: d_1(function (key) {
-			if (globalSymbols[key]) { return globalSymbols[key]; }
-			return (globalSymbols[key] = SymbolPolyfill(String(key)));
-		}),
-		keyFor: d_1(function (s) {
-			var key;
-			validateSymbol(s);
-			for (key in globalSymbols) { if (globalSymbols[key] === s) { return key; } }
-		}),
-
-		// To ensure proper interoperability with other native functions (e.g. Array.from)
-		// fallback to eventual native implementation of given symbol
-		hasInstance: d_1('', (NativeSymbol && NativeSymbol.hasInstance) || SymbolPolyfill('hasInstance')),
-		isConcatSpreadable: d_1('', (NativeSymbol && NativeSymbol.isConcatSpreadable) ||
-			SymbolPolyfill('isConcatSpreadable')),
-		iterator: d_1('', (NativeSymbol && NativeSymbol.iterator) || SymbolPolyfill('iterator')),
-		match: d_1('', (NativeSymbol && NativeSymbol.match) || SymbolPolyfill('match')),
-		replace: d_1('', (NativeSymbol && NativeSymbol.replace) || SymbolPolyfill('replace')),
-		search: d_1('', (NativeSymbol && NativeSymbol.search) || SymbolPolyfill('search')),
-		species: d_1('', (NativeSymbol && NativeSymbol.species) || SymbolPolyfill('species')),
-		split: d_1('', (NativeSymbol && NativeSymbol.split) || SymbolPolyfill('split')),
-		toPrimitive: d_1('', (NativeSymbol && NativeSymbol.toPrimitive) || SymbolPolyfill('toPrimitive')),
-		toStringTag: d_1('', (NativeSymbol && NativeSymbol.toStringTag) || SymbolPolyfill('toStringTag')),
-		unscopables: d_1('', (NativeSymbol && NativeSymbol.unscopables) || SymbolPolyfill('unscopables'))
-	});
-
-	// Internal tweaks for real symbol producer
-	defineProperties(HiddenSymbol.prototype, {
-		constructor: d_1(SymbolPolyfill),
-		toString: d_1('', function () { return this.__name__; })
-	});
-
-	// Proper implementation of methods exposed on Symbol.prototype
-	// They won't be accessible on produced symbol instances as they derive from HiddenSymbol.prototype
-	defineProperties(SymbolPolyfill.prototype, {
-		toString: d_1(function () { return 'Symbol (' + validateSymbol(this).__description__ + ')'; }),
-		valueOf: d_1(function () { return validateSymbol(this); })
-	});
-	defineProperty$1(SymbolPolyfill.prototype, SymbolPolyfill.toPrimitive, d_1('', function () {
-		var symbol = validateSymbol(this);
-		if (typeof symbol === 'symbol') { return symbol; }
-		return symbol.toString();
-	}));
-	defineProperty$1(SymbolPolyfill.prototype, SymbolPolyfill.toStringTag, d_1('c', 'Symbol'));
 
-	// Proper implementaton of toPrimitive and toStringTag for returned symbol instances
-	defineProperty$1(HiddenSymbol.prototype, SymbolPolyfill.toStringTag,
-		d_1('c', SymbolPolyfill.prototype[SymbolPolyfill.toStringTag]));
+	var data = isForced.data = {};
+	var NATIVE = isForced.NATIVE = 'N';
+	var POLYFILL = isForced.POLYFILL = 'P';
 
-	// Note: It's important to define `toPrimitive` as last one, as some implementations
-	// implement `toPrimitive` natively without implementing `toStringTag` (or other specified symbols)
-	// And that may invoke error in definition flow:
-	// See: https://github.com/medikoo/es6-symbol/issues/13#issuecomment-164146149
-	defineProperty$1(HiddenSymbol.prototype, SymbolPolyfill.toPrimitive,
-		d_1('c', SymbolPolyfill.prototype[SymbolPolyfill.toPrimitive]));
+	var isForced_1 = isForced;
 
-	var es6Symbol = isImplemented$7() ? Symbol : polyfill;
+	var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
 
-	var objToString = Object.prototype.toString
-	  , id = objToString.call((function () { return arguments; })());
 
-	var isArguments = function (value) { return objToString.call(value) === id; };
 
-	var objToString$1 = Object.prototype.toString, id$1 = objToString$1.call("");
 
-	var isString = function (value) {
-		return (
-			typeof value === "string" ||
-			(value &&
-				typeof value === "object" &&
-				(value instanceof String || objToString$1.call(value) === id$1)) ||
-			false
-		);
-	};
 
-	var isImplemented$8 = function () {
-		if (typeof globalThis !== "object") { return false; }
-		if (!globalThis) { return false; }
-		return globalThis.Array === Array;
-	};
 
-	var naiveFallback = function () {
-		if (typeof self === "object" && self) { return self; }
-		if (typeof window === "object" && window) { return window; }
-		throw new Error("Unable to resolve global `this`");
+	/*
+	  options.target      - name of the target object
+	  options.global      - target is the global object
+	  options.stat        - export as static methods of target
+	  options.proto       - export as prototype methods of target
+	  options.real        - real prototype method for the `pure` version
+	  options.forced      - export even if the native feature is available
+	  options.bind        - bind methods to the target, required for the `pure` version
+	  options.wrap        - wrap constructors to preventing global pollution, required for the `pure` version
+	  options.unsafe      - use the simple assignment of property instead of delete + defineProperty
+	  options.sham        - add a flag to not completely full polyfills
+	  options.enumerable  - export as enumerable property
+	  options.noTargetGet - prevent calling a getter on target
+	*/
+	var _export = function (options, source) {
+	  var TARGET = options.target;
+	  var GLOBAL = options.global;
+	  var STATIC = options.stat;
+	  var FORCED, target, key, targetProperty, sourceProperty, descriptor;
+	  if (GLOBAL) {
+	    target = global_1;
+	  } else if (STATIC) {
+	    target = global_1[TARGET] || setGlobal(TARGET, {});
+	  } else {
+	    target = (global_1[TARGET] || {}).prototype;
+	  }
+	  if (target) for (key in source) {
+	    sourceProperty = source[key];
+	    if (options.noTargetGet) {
+	      descriptor = getOwnPropertyDescriptor$1(target, key);
+	      targetProperty = descriptor && descriptor.value;
+	    } else targetProperty = target[key];
+	    FORCED = isForced_1(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);
+	    // contained in target
+	    if (!FORCED && targetProperty !== undefined) {
+	      if (typeof sourceProperty === typeof targetProperty) continue;
+	      copyConstructorProperties(sourceProperty, targetProperty);
+	    }
+	    // add a flag to not completely full polyfills
+	    if (options.sham || (targetProperty && targetProperty.sham)) {
+	      createNonEnumerableProperty(sourceProperty, 'sham', true);
+	    }
+	    // extend global
+	    redefine(target, key, sourceProperty, options);
+	  }
 	};
 
-	var implementation = (function () {
-		if (this) { return this; }
-
-		// Unexpected strict mode (may happen if e.g. bundled into ESM module)
-
-		// Thanks @mathiasbynens -> https://mathiasbynens.be/notes/globalthis
-		// In all ES5+ engines global object inherits from Object.prototype
-		// (if you approached one that doesn't please report)
-		try {
-			Object.defineProperty(Object.prototype, "__global__", {
-				get: function () { return this; },
-				configurable: true
-			});
-		} catch (error) {
-			// Unfortunate case of Object.prototype being sealed (via preventExtensions, seal or freeze)
-			return naiveFallback();
-		}
-		try {
-			// Safari case (window.__global__ is resolved with global context, but __global__ does not)
-			if (!__global__) { return naiveFallback(); }
-			return __global__;
-		} finally {
-			delete Object.prototype.__global__;
-		}
-	})();
-
-	var globalThis_1 = isImplemented$8() ? globalThis : implementation;
+	// `Date.now` method
+	// https://tc39.github.io/ecma262/#sec-date.now
+	_export({ target: 'Date', stat: true }, {
+	  now: function now() {
+	    return new Date().getTime();
+	  }
+	});
 
-	var validTypes$1 = { object: true, symbol: true };
+	var DatePrototype = Date.prototype;
+	var INVALID_DATE = 'Invalid Date';
+	var TO_STRING = 'toString';
+	var nativeDateToString = DatePrototype[TO_STRING];
+	var getTime = DatePrototype.getTime;
+
+	// `Date.prototype.toString` method
+	// https://tc39.github.io/ecma262/#sec-date.prototype.tostring
+	if (new Date(NaN) + '' != INVALID_DATE) {
+	  redefine(DatePrototype, TO_STRING, function toString() {
+	    var value = getTime.call(this);
+	    // eslint-disable-next-line no-self-compare
+	    return value === value ? nativeDateToString.call(this) : INVALID_DATE;
+	  });
+	}
 
-	var isImplemented$9 = function () {
-		var Symbol = globalThis_1.Symbol;
-		var symbol;
-		if (typeof Symbol !== "function") { return false; }
-		symbol = Symbol("test symbol");
-		try { String(symbol); }
-		catch (e) { return false; }
+	var nativeSymbol = !!Object.getOwnPropertySymbols && !fails(function () {
+	  // Chrome 38 Symbol has incorrect toString conversion
+	  // eslint-disable-next-line no-undef
+	  return !String(Symbol());
+	});
 
-		// Return 'true' also for polyfills
-		if (!validTypes$1[typeof Symbol.iterator]) { return false; }
-		if (!validTypes$1[typeof Symbol.toPrimitive]) { return false; }
-		if (!validTypes$1[typeof Symbol.toStringTag]) { return false; }
+	var useSymbolAsUid = nativeSymbol
+	  // eslint-disable-next-line no-undef
+	  && !Symbol.sham
+	  // eslint-disable-next-line no-undef
+	  && typeof Symbol.iterator == 'symbol';
 
-		return true;
+	// `IsArray` abstract operation
+	// https://tc39.github.io/ecma262/#sec-isarray
+	var isArray = Array.isArray || function isArray(arg) {
+	  return classofRaw(arg) == 'Array';
 	};
 
-	var isSymbol$1 = function (value) {
-		if (!value) { return false; }
-		if (typeof value === "symbol") { return true; }
-		if (!value.constructor) { return false; }
-		if (value.constructor.name !== "Symbol") { return false; }
-		return value[value.constructor.toStringTag] === "Symbol";
+	// `ToObject` abstract operation
+	// https://tc39.github.io/ecma262/#sec-toobject
+	var toObject = function (argument) {
+	  return Object(requireObjectCoercible(argument));
 	};
 
-	var validateSymbol$1 = function (value) {
-		if (!isSymbol$1(value)) { throw new TypeError(value + " is not a symbol"); }
-		return value;
+	// `Object.keys` method
+	// https://tc39.github.io/ecma262/#sec-object.keys
+	var objectKeys = Object.keys || function keys(O) {
+	  return objectKeysInternal(O, enumBugKeys);
 	};
 
-	var create$4 = Object.create, defineProperty$2 = Object.defineProperty, objPrototype$1 = Object.prototype;
-
-	var created = create$4(null);
-	var generateName$1 = function (desc) {
-		var postfix = 0, name, ie11BugWorkaround;
-		while (created[desc + (postfix || "")]) { ++postfix; }
-		desc += postfix || "";
-		created[desc] = true;
-		name = "@@" + desc;
-		defineProperty$2(
-			objPrototype$1,
-			name,
-			d_1.gs(null, function (value) {
-				// For IE11 issue see:
-				// https://connect.microsoft.com/IE/feedbackdetail/view/1928508/
-				//    ie11-broken-getters-on-dom-objects
-				// https://github.com/medikoo/es6-symbol/issues/12
-				if (ie11BugWorkaround) { return; }
-				ie11BugWorkaround = true;
-				defineProperty$2(this, name, d_1(value));
-				ie11BugWorkaround = false;
-			})
-		);
-		return name;
+	// `Object.defineProperties` method
+	// https://tc39.github.io/ecma262/#sec-object.defineproperties
+	var objectDefineProperties = descriptors ? Object.defineProperties : function defineProperties(O, Properties) {
+	  anObject(O);
+	  var keys = objectKeys(Properties);
+	  var length = keys.length;
+	  var index = 0;
+	  var key;
+	  while (length > index) objectDefineProperty.f(O, key = keys[index++], Properties[key]);
+	  return O;
+	};
+
+	var html = getBuiltIn('document', 'documentElement');
+
+	var GT = '>';
+	var LT = '<';
+	var PROTOTYPE = 'prototype';
+	var SCRIPT = 'script';
+	var IE_PROTO = sharedKey('IE_PROTO');
+
+	var EmptyConstructor = function () { /* empty */ };
+
+	var scriptTag = function (content) {
+	  return LT + SCRIPT + GT + content + LT + '/' + SCRIPT + GT;
+	};
+
+	// Create object with fake `null` prototype: use ActiveX Object with cleared prototype
+	var NullProtoObjectViaActiveX = function (activeXDocument) {
+	  activeXDocument.write(scriptTag(''));
+	  activeXDocument.close();
+	  var temp = activeXDocument.parentWindow.Object;
+	  activeXDocument = null; // avoid memory leak
+	  return temp;
+	};
+
+	// Create object with fake `null` prototype: use iframe Object with cleared prototype
+	var NullProtoObjectViaIFrame = function () {
+	  // Thrash, waste and sodomy: IE GC bug
+	  var iframe = documentCreateElement('iframe');
+	  var JS = 'java' + SCRIPT + ':';
+	  var iframeDocument;
+	  iframe.style.display = 'none';
+	  html.appendChild(iframe);
+	  // https://github.com/zloirock/core-js/issues/475
+	  iframe.src = String(JS);
+	  iframeDocument = iframe.contentWindow.document;
+	  iframeDocument.open();
+	  iframeDocument.write(scriptTag('document.F=Object'));
+	  iframeDocument.close();
+	  return iframeDocument.F;
+	};
+
+	// Check for document.domain and active x support
+	// No need to use active x approach when document.domain is not set
+	// see https://github.com/es-shims/es5-shim/issues/150
+	// variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346
+	// avoid IE GC bug
+	var activeXDocument;
+	var NullProtoObject = function () {
+	  try {
+	    /* global ActiveXObject */
+	    activeXDocument = document.domain && new ActiveXObject('htmlfile');
+	  } catch (error) { /* ignore */ }
+	  NullProtoObject = activeXDocument ? NullProtoObjectViaActiveX(activeXDocument) : NullProtoObjectViaIFrame();
+	  var length = enumBugKeys.length;
+	  while (length--) delete NullProtoObject[PROTOTYPE][enumBugKeys[length]];
+	  return NullProtoObject();
 	};
 
-	var NativeSymbol$1 = globalThis_1.Symbol;
-
-	var standardSymbols = function (SymbolPolyfill) {
-		return Object.defineProperties(SymbolPolyfill, {
-			// To ensure proper interoperability with other native functions (e.g. Array.from)
-			// fallback to eventual native implementation of given symbol
-			hasInstance: d_1(
-				"", (NativeSymbol$1 && NativeSymbol$1.hasInstance) || SymbolPolyfill("hasInstance")
-			),
-			isConcatSpreadable: d_1(
-				"",
-				(NativeSymbol$1 && NativeSymbol$1.isConcatSpreadable) ||
-					SymbolPolyfill("isConcatSpreadable")
-			),
-			iterator: d_1("", (NativeSymbol$1 && NativeSymbol$1.iterator) || SymbolPolyfill("iterator")),
-			match: d_1("", (NativeSymbol$1 && NativeSymbol$1.match) || SymbolPolyfill("match")),
-			replace: d_1("", (NativeSymbol$1 && NativeSymbol$1.replace) || SymbolPolyfill("replace")),
-			search: d_1("", (NativeSymbol$1 && NativeSymbol$1.search) || SymbolPolyfill("search")),
-			species: d_1("", (NativeSymbol$1 && NativeSymbol$1.species) || SymbolPolyfill("species")),
-			split: d_1("", (NativeSymbol$1 && NativeSymbol$1.split) || SymbolPolyfill("split")),
-			toPrimitive: d_1(
-				"", (NativeSymbol$1 && NativeSymbol$1.toPrimitive) || SymbolPolyfill("toPrimitive")
-			),
-			toStringTag: d_1(
-				"", (NativeSymbol$1 && NativeSymbol$1.toStringTag) || SymbolPolyfill("toStringTag")
-			),
-			unscopables: d_1(
-				"", (NativeSymbol$1 && NativeSymbol$1.unscopables) || SymbolPolyfill("unscopables")
-			)
-		});
-	};
+	hiddenKeys[IE_PROTO] = true;
 
-	var registry = Object.create(null);
-
-	var symbolRegistry = function (SymbolPolyfill) {
-		return Object.defineProperties(SymbolPolyfill, {
-			for: d_1(function (key) {
-				if (registry[key]) { return registry[key]; }
-				return (registry[key] = SymbolPolyfill(String(key)));
-			}),
-			keyFor: d_1(function (symbol) {
-				var key;
-				validateSymbol$1(symbol);
-				for (key in registry) {
-					if (registry[key] === symbol) { return key; }
-				}
-				return undefined;
-			})
-		});
+	// `Object.create` method
+	// https://tc39.github.io/ecma262/#sec-object.create
+	var objectCreate = Object.create || function create(O, Properties) {
+	  var result;
+	  if (O !== null) {
+	    EmptyConstructor[PROTOTYPE] = anObject(O);
+	    result = new EmptyConstructor();
+	    EmptyConstructor[PROTOTYPE] = null;
+	    // add "__proto__" for Object.getPrototypeOf polyfill
+	    result[IE_PROTO] = O;
+	  } else result = NullProtoObject();
+	  return Properties === undefined ? result : objectDefineProperties(result, Properties);
 	};
 
-	var NativeSymbol$2         = globalThis_1.Symbol;
+	var nativeGetOwnPropertyNames = objectGetOwnPropertyNames.f;
 
-	var create$5 = Object.create
-	  , defineProperties$1 = Object.defineProperties
-	  , defineProperty$3 = Object.defineProperty;
+	var toString$1 = {}.toString;
 
-	var SymbolPolyfill$1, HiddenSymbol$1, isNativeSafe$1;
+	var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
+	  ? Object.getOwnPropertyNames(window) : [];
 
-	if (typeof NativeSymbol$2 === "function") {
-		try {
-			String(NativeSymbol$2());
-			isNativeSafe$1 = true;
-		} catch (ignore) {}
-	} else {
-		NativeSymbol$2 = null;
-	}
-
-	// Internal constructor (not one exposed) for creating Symbol instances.
-	// This one is used to ensure that `someSymbol instanceof Symbol` always return false
-	HiddenSymbol$1 = function Symbol(description) {
-		if (this instanceof HiddenSymbol$1) { throw new TypeError("Symbol is not a constructor"); }
-		return SymbolPolyfill$1(description);
+	var getWindowNames = function (it) {
+	  try {
+	    return nativeGetOwnPropertyNames(it);
+	  } catch (error) {
+	    return windowNames.slice();
+	  }
 	};
 
-	// Exposed `Symbol` constructor
-	// (returns instances of HiddenSymbol)
-	var polyfill$1 = SymbolPolyfill$1 = function Symbol(description) {
-		var symbol;
-		if (this instanceof Symbol) { throw new TypeError("Symbol is not a constructor"); }
-		if (isNativeSafe$1) { return NativeSymbol$2(description); }
-		symbol = create$5(HiddenSymbol$1.prototype);
-		description = description === undefined ? "" : String(description);
-		return defineProperties$1(symbol, {
-			__description__: d_1("", description),
-			__name__: d_1("", generateName$1(description))
-		});
+	// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
+	var f$5 = function getOwnPropertyNames(it) {
+	  return windowNames && toString$1.call(it) == '[object Window]'
+	    ? getWindowNames(it)
+	    : nativeGetOwnPropertyNames(toIndexedObject(it));
 	};
 
-	standardSymbols(SymbolPolyfill$1);
-	symbolRegistry(SymbolPolyfill$1);
-
-	// Internal tweaks for real symbol producer
-	defineProperties$1(HiddenSymbol$1.prototype, {
-		constructor: d_1(SymbolPolyfill$1),
-		toString: d_1("", function () { return this.__name__; })
-	});
-
-	// Proper implementation of methods exposed on Symbol.prototype
-	// They won't be accessible on produced symbol instances as they derive from HiddenSymbol.prototype
-	defineProperties$1(SymbolPolyfill$1.prototype, {
-		toString: d_1(function () { return "Symbol (" + validateSymbol$1(this).__description__ + ")"; }),
-		valueOf: d_1(function () { return validateSymbol$1(this); })
-	});
-	defineProperty$3(
-		SymbolPolyfill$1.prototype,
-		SymbolPolyfill$1.toPrimitive,
-		d_1("", function () {
-			var symbol = validateSymbol$1(this);
-			if (typeof symbol === "symbol") { return symbol; }
-			return symbol.toString();
-		})
-	);
-	defineProperty$3(SymbolPolyfill$1.prototype, SymbolPolyfill$1.toStringTag, d_1("c", "Symbol"));
-
-	// Proper implementaton of toPrimitive and toStringTag for returned symbol instances
-	defineProperty$3(
-		HiddenSymbol$1.prototype, SymbolPolyfill$1.toStringTag,
-		d_1("c", SymbolPolyfill$1.prototype[SymbolPolyfill$1.toStringTag])
-	);
-
-	// Note: It's important to define `toPrimitive` as last one, as some implementations
-	// implement `toPrimitive` natively without implementing `toStringTag` (or other specified symbols)
-	// And that may invoke error in definition flow:
-	// See: https://github.com/medikoo/es6-symbol/issues/13#issuecomment-164146149
-	defineProperty$3(
-		HiddenSymbol$1.prototype, SymbolPolyfill$1.toPrimitive,
-		d_1("c", SymbolPolyfill$1.prototype[SymbolPolyfill$1.toPrimitive])
-	);
-
-	var es6Symbol$1 = isImplemented$9()
-		? globalThis_1.Symbol
-		: polyfill$1;
-
-	var iteratorSymbol = es6Symbol$1.iterator
-	  , isArray        = Array.isArray;
-
-	var isIterable = function (value) {
-		if (!isValue(value)) { return false; }
-		if (isArray(value)) { return true; }
-		if (isString(value)) { return true; }
-		if (isArguments(value)) { return true; }
-		return typeof value[iteratorSymbol] === "function";
+	var objectGetOwnPropertyNamesExternal = {
+		f: f$5
 	};
 
-	var validIterable = function (value) {
-		if (!isIterable(value)) { throw new TypeError(value + " is not iterable"); }
-		return value;
-	};
+	var WellKnownSymbolsStore = shared('wks');
+	var Symbol$1 = global_1.Symbol;
+	var createWellKnownSymbol = useSymbolAsUid ? Symbol$1 : Symbol$1 && Symbol$1.withoutSetter || uid;
 
-	var objectToString = Object.prototype.toString;
-
-	var coerce = function (value) {
-		if (!is(value)) { return null; }
-		if (is$1(value)) {
-			// Reject Object.prototype.toString coercion
-			var valueToString = value.toString;
-			if (typeof valueToString !== "function") { return null; }
-			if (valueToString === objectToString) { return null; }
-			// Note: It can be object coming from other realm, still as there's no ES3 and CSP compliant
-			// way to resolve its realm's Object.prototype.toString it's left as not addressed edge case
-		}
-		try {
-			return "" + value; // Ensure implicit coercion
-		} catch (error) {
-			return null;
-		}
+	var wellKnownSymbol = function (name) {
+	  if (!has(WellKnownSymbolsStore, name)) {
+	    if (nativeSymbol && has(Symbol$1, name)) WellKnownSymbolsStore[name] = Symbol$1[name];
+	    else WellKnownSymbolsStore[name] = createWellKnownSymbol('Symbol.' + name);
+	  } return WellKnownSymbolsStore[name];
 	};
 
-	var safeToString = function (value) {
-		try {
-			return value.toString();
-		} catch (error) {
-			try { return String(value); }
-			catch (error2) { return null; }
-		}
-	};
+	var f$6 = wellKnownSymbol;
 
-	var reNewLine = /[\n\r\u2028\u2029]/g;
-
-	var toShortString = function (value) {
-		var string = safeToString(value);
-		if (string === null) { return "<Non-coercible to string value>"; }
-		// Trim if too long
-		if (string.length > 100) { string = string.slice(0, 99) + "…"; }
-		// Replace eventual new lines
-		string = string.replace(reNewLine, function (char) {
-			switch (char) {
-				case "\n":
-					return "\\n";
-				case "\r":
-					return "\\r";
-				case "\u2028":
-					return "\\u2028";
-				case "\u2029":
-					return "\\u2029";
-				/* istanbul ignore next */
-				default:
-					throw new Error("Unexpected character");
-			}
-		});
-		return string;
+	var wellKnownSymbolWrapped = {
+		f: f$6
 	};
 
-	var resolveMessage = function (message, value) {
-		return message.replace("%v", toShortString(value));
-	};
+	var defineProperty = objectDefineProperty.f;
 
-	var resolveException = function (value, defaultMessage, inputOptions) {
-		if (!is$1(inputOptions)) { throw new TypeError(resolveMessage(defaultMessage, value)); }
-		if (!is(value)) {
-			if ("default" in inputOptions) { return inputOptions["default"]; }
-			if (inputOptions.isOptional) { return null; }
-		}
-		var errorMessage = coerce(inputOptions.errorMessage);
-		if (!is(errorMessage)) { errorMessage = defaultMessage; }
-		throw new TypeError(resolveMessage(errorMessage, value));
+	var defineWellKnownSymbol = function (NAME) {
+	  var Symbol = path.Symbol || (path.Symbol = {});
+	  if (!has(Symbol, NAME)) defineProperty(Symbol, NAME, {
+	    value: wellKnownSymbolWrapped.f(NAME)
+	  });
 	};
 
-	var ensure = function (value/*, options*/) {
-		if (is(value)) { return value; }
-		return resolveException(value, "Cannot use %v", arguments[1]);
-	};
+	var defineProperty$1 = objectDefineProperty.f;
 
-	var ensure$1 = function (value/*, options*/) {
-		if (is$4(value)) { return value; }
-		return resolveException(value, "%v is not a plain function", arguments[1]);
-	};
 
-	var isImplemented$a = function () {
-		var from = Array.from, arr, result;
-		if (typeof from !== "function") { return false; }
-		arr = ["raz", "dwa"];
-		result = from(arr);
-		return Boolean(result && result !== arr && result[1] === "dwa");
-	};
 
-	var objToString$2 = Object.prototype.toString
-	  , isFunctionStringTag = RegExp.prototype.test.bind(/^[object [A-Za-z0-9]*Function]$/);
+	var TO_STRING_TAG = wellKnownSymbol('toStringTag');
 
-	var isFunction = function (value) {
-		return typeof value === "function" && isFunctionStringTag(objToString$2.call(value));
+	var setToStringTag = function (it, TAG, STATIC) {
+	  if (it && !has(it = STATIC ? it : it.prototype, TO_STRING_TAG)) {
+	    defineProperty$1(it, TO_STRING_TAG, { configurable: true, value: TAG });
+	  }
 	};
 
-	var iteratorSymbol$1 = es6Symbol$1.iterator
-	  , isArray$1        = Array.isArray
-	  , call           = Function.prototype.call
-	  , desc           = { configurable: true, enumerable: true, writable: true, value: null }
-	  , defineProperty$4 = Object.defineProperty;
-
-	// eslint-disable-next-line complexity, max-lines-per-function
-	var shim$7 = function (arrayLike/*, mapFn, thisArg*/) {
-		var mapFn = arguments[1]
-		  , thisArg = arguments[2]
-		  , Context
-		  , i
-		  , j
-		  , arr
-		  , length
-		  , code
-		  , iterator
-		  , result
-		  , getIterator
-		  , value;
-
-		arrayLike = Object(validValue(arrayLike));
-
-		if (isValue(mapFn)) { validCallable(mapFn); }
-		if (!this || this === Array || !isFunction(this)) {
-			// Result: Plain array
-			if (!mapFn) {
-				if (isArguments(arrayLike)) {
-					// Source: Arguments
-					length = arrayLike.length;
-					if (length !== 1) { return Array.apply(null, arrayLike); }
-					arr = new Array(1);
-					arr[0] = arrayLike[0];
-					return arr;
-				}
-				if (isArray$1(arrayLike)) {
-					// Source: Array
-					arr = new Array((length = arrayLike.length));
-					for (i = 0; i < length; ++i) { arr[i] = arrayLike[i]; }
-					return arr;
-				}
-			}
-			arr = [];
-		} else {
-			// Result: Non plain array
-			Context = this;
-		}
-
-		if (!isArray$1(arrayLike)) {
-			if ((getIterator = arrayLike[iteratorSymbol$1]) !== undefined) {
-				// Source: Iterator
-				iterator = validCallable(getIterator).call(arrayLike);
-				if (Context) { arr = new Context(); }
-				result = iterator.next();
-				i = 0;
-				while (!result.done) {
-					value = mapFn ? call.call(mapFn, thisArg, result.value, i) : result.value;
-					if (Context) {
-						desc.value = value;
-						defineProperty$4(arr, i, desc);
-					} else {
-						arr[i] = value;
-					}
-					result = iterator.next();
-					++i;
-				}
-				length = i;
-			} else if (isString(arrayLike)) {
-				// Source: String
-				length = arrayLike.length;
-				if (Context) { arr = new Context(); }
-				for (i = 0, j = 0; i < length; ++i) {
-					value = arrayLike[i];
-					if (i + 1 < length) {
-						code = value.charCodeAt(0);
-						// eslint-disable-next-line max-depth
-						if (code >= 0xd800 && code <= 0xdbff) { value += arrayLike[++i]; }
-					}
-					value = mapFn ? call.call(mapFn, thisArg, value, j) : value;
-					if (Context) {
-						desc.value = value;
-						defineProperty$4(arr, j, desc);
-					} else {
-						arr[j] = value;
-					}
-					++j;
-				}
-				length = j;
-			}
-		}
-		if (length === undefined) {
-			// Source: array or array-like
-			length = toPosInteger(arrayLike.length);
-			if (Context) { arr = new Context(length); }
-			for (i = 0; i < length; ++i) {
-				value = mapFn ? call.call(mapFn, thisArg, arrayLike[i], i) : arrayLike[i];
-				if (Context) {
-					desc.value = value;
-					defineProperty$4(arr, i, desc);
-				} else {
-					arr[i] = value;
-				}
-			}
-		}
-		if (Context) {
-			desc.value = null;
-			arr.length = length;
-		}
-		return arr;
+	var aFunction$1 = function (it) {
+	  if (typeof it != 'function') {
+	    throw TypeError(String(it) + ' is not a function');
+	  } return it;
 	};
 
-	var from_1 = isImplemented$a() ? Array.from : shim$7;
-
-	var copy = function (obj/*, propertyNames, options*/) {
-		var copy = Object(validValue(obj)), propertyNames = arguments[1], options = Object(arguments[2]);
-		if (copy !== obj && !propertyNames) { return copy; }
-		var result = {};
-		if (propertyNames) {
-			from_1(propertyNames, function (propertyName) {
-				if (options.ensure || propertyName in obj) { result[propertyName] = obj[propertyName]; }
-			});
-		} else {
-			assign(result, obj);
-		}
-		return result;
+	// optional / simple context binding
+	var functionBindContext = function (fn, that, length) {
+	  aFunction$1(fn);
+	  if (that === undefined) return fn;
+	  switch (length) {
+	    case 0: return function () {
+	      return fn.call(that);
+	    };
+	    case 1: return function (a) {
+	      return fn.call(that, a);
+	    };
+	    case 2: return function (a, b) {
+	      return fn.call(that, a, b);
+	    };
+	    case 3: return function (a, b, c) {
+	      return fn.call(that, a, b, c);
+	    };
+	  }
+	  return function (/* ...args */) {
+	    return fn.apply(that, arguments);
+	  };
 	};
 
-	var bind                    = Function.prototype.bind
-	  , call$1                    = Function.prototype.call
-	  , keys$2                    = Object.keys
-	  , objPropertyIsEnumerable = Object.prototype.propertyIsEnumerable;
+	var SPECIES = wellKnownSymbol('species');
+
+	// `ArraySpeciesCreate` abstract operation
+	// https://tc39.github.io/ecma262/#sec-arrayspeciescreate
+	var arraySpeciesCreate = function (originalArray, length) {
+	  var C;
+	  if (isArray(originalArray)) {
+	    C = originalArray.constructor;
+	    // cross-realm fallback
+	    if (typeof C == 'function' && (C === Array || isArray(C.prototype))) C = undefined;
+	    else if (isObject(C)) {
+	      C = C[SPECIES];
+	      if (C === null) C = undefined;
+	    }
+	  } return new (C === undefined ? Array : C)(length === 0 ? 0 : length);
+	};
 
-	var _iterate = function (method, defVal) {
-		return function (obj, cb/*, thisArg, compareFn*/) {
-			var list, thisArg = arguments[2], compareFn = arguments[3];
-			obj = Object(validValue(obj));
-			validCallable(cb);
+	var push = [].push;
 
-			list = keys$2(obj);
-			if (compareFn) {
-				list.sort(typeof compareFn === "function" ? bind.call(compareFn, obj) : undefined);
-			}
-			if (typeof method !== "function") { method = list[method]; }
-			return call$1.call(method, list, function (key, index) {
-				if (!objPropertyIsEnumerable.call(obj, key)) { return defVal; }
-				return call$1.call(cb, thisArg, obj[key], key, obj, index);
-			});
-		};
+	// `Array.prototype.{ forEach, map, filter, some, every, find, findIndex }` methods implementation
+	var createMethod$1 = function (TYPE) {
+	  var IS_MAP = TYPE == 1;
+	  var IS_FILTER = TYPE == 2;
+	  var IS_SOME = TYPE == 3;
+	  var IS_EVERY = TYPE == 4;
+	  var IS_FIND_INDEX = TYPE == 6;
+	  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
+	  return function ($this, callbackfn, that, specificCreate) {
+	    var O = toObject($this);
+	    var self = indexedObject(O);
+	    var boundFunction = functionBindContext(callbackfn, that, 3);
+	    var length = toLength(self.length);
+	    var index = 0;
+	    var create = specificCreate || arraySpeciesCreate;
+	    var target = IS_MAP ? create($this, length) : IS_FILTER ? create($this, 0) : undefined;
+	    var value, result;
+	    for (;length > index; index++) if (NO_HOLES || index in self) {
+	      value = self[index];
+	      result = boundFunction(value, index, O);
+	      if (TYPE) {
+	        if (IS_MAP) target[index] = result; // map
+	        else if (result) switch (TYPE) {
+	          case 3: return true;              // some
+	          case 5: return value;             // find
+	          case 6: return index;             // findIndex
+	          case 2: push.call(target, value); // filter
+	        } else if (IS_EVERY) return false;  // every
+	      }
+	    }
+	    return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
+	  };
+	};
+
+	var arrayIteration = {
+	  // `Array.prototype.forEach` method
+	  // https://tc39.github.io/ecma262/#sec-array.prototype.foreach
+	  forEach: createMethod$1(0),
+	  // `Array.prototype.map` method
+	  // https://tc39.github.io/ecma262/#sec-array.prototype.map
+	  map: createMethod$1(1),
+	  // `Array.prototype.filter` method
+	  // https://tc39.github.io/ecma262/#sec-array.prototype.filter
+	  filter: createMethod$1(2),
+	  // `Array.prototype.some` method
+	  // https://tc39.github.io/ecma262/#sec-array.prototype.some
+	  some: createMethod$1(3),
+	  // `Array.prototype.every` method
+	  // https://tc39.github.io/ecma262/#sec-array.prototype.every
+	  every: createMethod$1(4),
+	  // `Array.prototype.find` method
+	  // https://tc39.github.io/ecma262/#sec-array.prototype.find
+	  find: createMethod$1(5),
+	  // `Array.prototype.findIndex` method
+	  // https://tc39.github.io/ecma262/#sec-array.prototype.findIndex
+	  findIndex: createMethod$1(6)
+	};
+
+	var $forEach = arrayIteration.forEach;
+
+	var HIDDEN = sharedKey('hidden');
+	var SYMBOL = 'Symbol';
+	var PROTOTYPE$1 = 'prototype';
+	var TO_PRIMITIVE = wellKnownSymbol('toPrimitive');
+	var setInternalState = internalState.set;
+	var getInternalState = internalState.getterFor(SYMBOL);
+	var ObjectPrototype = Object[PROTOTYPE$1];
+	var $Symbol = global_1.Symbol;
+	var $stringify = getBuiltIn('JSON', 'stringify');
+	var nativeGetOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
+	var nativeDefineProperty$1 = objectDefineProperty.f;
+	var nativeGetOwnPropertyNames$1 = objectGetOwnPropertyNamesExternal.f;
+	var nativePropertyIsEnumerable$1 = objectPropertyIsEnumerable.f;
+	var AllSymbols = shared('symbols');
+	var ObjectPrototypeSymbols = shared('op-symbols');
+	var StringToSymbolRegistry = shared('string-to-symbol-registry');
+	var SymbolToStringRegistry = shared('symbol-to-string-registry');
+	var WellKnownSymbolsStore$1 = shared('wks');
+	var QObject = global_1.QObject;
+	// Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173
+	var USE_SETTER = !QObject || !QObject[PROTOTYPE$1] || !QObject[PROTOTYPE$1].findChild;
+
+	// fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
+	var setSymbolDescriptor = descriptors && fails(function () {
+	  return objectCreate(nativeDefineProperty$1({}, 'a', {
+	    get: function () { return nativeDefineProperty$1(this, 'a', { value: 7 }).a; }
+	  })).a != 7;
+	}) ? function (O, P, Attributes) {
+	  var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor$1(ObjectPrototype, P);
+	  if (ObjectPrototypeDescriptor) delete ObjectPrototype[P];
+	  nativeDefineProperty$1(O, P, Attributes);
+	  if (ObjectPrototypeDescriptor && O !== ObjectPrototype) {
+	    nativeDefineProperty$1(ObjectPrototype, P, ObjectPrototypeDescriptor);
+	  }
+	} : nativeDefineProperty$1;
+
+	var wrap = function (tag, description) {
+	  var symbol = AllSymbols[tag] = objectCreate($Symbol[PROTOTYPE$1]);
+	  setInternalState(symbol, {
+	    type: SYMBOL,
+	    tag: tag,
+	    description: description
+	  });
+	  if (!descriptors) symbol.description = description;
+	  return symbol;
 	};
 
-	var forEach$1 = _iterate("forEach");
+	var isSymbol = useSymbolAsUid ? function (it) {
+	  return typeof it == 'symbol';
+	} : function (it) {
+	  return Object(it) instanceof $Symbol;
+	};
 
-	var call$2     = Function.prototype.call;
+	var $defineProperty = function defineProperty(O, P, Attributes) {
+	  if (O === ObjectPrototype) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
+	  anObject(O);
+	  var key = toPrimitive(P, true);
+	  anObject(Attributes);
+	  if (has(AllSymbols, key)) {
+	    if (!Attributes.enumerable) {
+	      if (!has(O, HIDDEN)) nativeDefineProperty$1(O, HIDDEN, createPropertyDescriptor(1, {}));
+	      O[HIDDEN][key] = true;
+	    } else {
+	      if (has(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
+	      Attributes = objectCreate(Attributes, { enumerable: createPropertyDescriptor(0, false) });
+	    } return setSymbolDescriptor(O, key, Attributes);
+	  } return nativeDefineProperty$1(O, key, Attributes);
+	};
+
+	var $defineProperties = function defineProperties(O, Properties) {
+	  anObject(O);
+	  var properties = toIndexedObject(Properties);
+	  var keys = objectKeys(properties).concat($getOwnPropertySymbols(properties));
+	  $forEach(keys, function (key) {
+	    if (!descriptors || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);
+	  });
+	  return O;
+	};
 
-	var map$1 = function (obj, cb/*, thisArg*/) {
-		var result = {}, thisArg = arguments[2];
-		validCallable(cb);
-		forEach$1(obj, function (value, key, targetObj, index) {
-			result[key] = call$2.call(cb, thisArg, value, key, targetObj, index);
-		});
-		return result;
+	var $create = function create(O, Properties) {
+	  return Properties === undefined ? objectCreate(O) : $defineProperties(objectCreate(O), Properties);
 	};
 
-	var bind$1 = Function.prototype.bind
-	  , defineProperty$5 = Object.defineProperty
-	  , hasOwnProperty$1 = Object.prototype.hasOwnProperty
-	  , define;
-
-	define = function (name, desc, options) {
-		var value = ensure(desc) && ensure$1(desc.value), dgs;
-		dgs = copy(desc);
-		delete dgs.writable;
-		delete dgs.value;
-		dgs.get = function () {
-			if (!options.overwriteDefinition && hasOwnProperty$1.call(this, name)) { return value; }
-			desc.value = bind$1.call(value, options.resolveContext ? options.resolveContext(this) : this);
-			defineProperty$5(this, name, desc);
-			return this[name];
-		};
-		return dgs;
+	var $propertyIsEnumerable = function propertyIsEnumerable(V) {
+	  var P = toPrimitive(V, true);
+	  var enumerable = nativePropertyIsEnumerable$1.call(this, P);
+	  if (this === ObjectPrototype && has(AllSymbols, P) && !has(ObjectPrototypeSymbols, P)) return false;
+	  return enumerable || !has(this, P) || !has(AllSymbols, P) || has(this, HIDDEN) && this[HIDDEN][P] ? enumerable : true;
 	};
 
-	var autoBind = function (props/*, options*/) {
-		var options = normalizeOptions(arguments[1]);
-		if (is(options.resolveContext)) { ensure$1(options.resolveContext); }
-		return map$1(props, function (desc, name) { return define(name, desc, options); });
+	var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {
+	  var it = toIndexedObject(O);
+	  var key = toPrimitive(P, true);
+	  if (it === ObjectPrototype && has(AllSymbols, key) && !has(ObjectPrototypeSymbols, key)) return;
+	  var descriptor = nativeGetOwnPropertyDescriptor$1(it, key);
+	  if (descriptor && has(AllSymbols, key) && !(has(it, HIDDEN) && it[HIDDEN][key])) {
+	    descriptor.enumerable = true;
+	  }
+	  return descriptor;
 	};
 
-	var defineProperty$6 = Object.defineProperty, defineProperties$2 = Object.defineProperties, Iterator;
-
-	var es6Iterator = Iterator = function (list, context) {
-		if (!(this instanceof Iterator)) { throw new TypeError("Constructor requires 'new'"); }
-		defineProperties$2(this, {
-			__list__: d_1("w", validValue(list)),
-			__context__: d_1("w", context),
-			__nextIndex__: d_1("w", 0)
-		});
-		if (!context) { return; }
-		validCallable(context.on);
-		context.on("_add", this._onAdd);
-		context.on("_delete", this._onDelete);
-		context.on("_clear", this._onClear);
+	var $getOwnPropertyNames = function getOwnPropertyNames(O) {
+	  var names = nativeGetOwnPropertyNames$1(toIndexedObject(O));
+	  var result = [];
+	  $forEach(names, function (key) {
+	    if (!has(AllSymbols, key) && !has(hiddenKeys, key)) result.push(key);
+	  });
+	  return result;
 	};
 
-	// Internal %IteratorPrototype% doesn't expose its constructor
-	delete Iterator.prototype.constructor;
-
-	defineProperties$2(
-		Iterator.prototype,
-		assign(
-			{
-				_next: d_1(function () {
-					var i;
-					if (!this.__list__) { return undefined; }
-					if (this.__redo__) {
-						i = this.__redo__.shift();
-						if (i !== undefined) { return i; }
-					}
-					if (this.__nextIndex__ < this.__list__.length) { return this.__nextIndex__++; }
-					this._unBind();
-					return undefined;
-				}),
-				next: d_1(function () {
-					return this._createResult(this._next());
-				}),
-				_createResult: d_1(function (i) {
-					if (i === undefined) { return { done: true, value: undefined }; }
-					return { done: false, value: this._resolve(i) };
-				}),
-				_resolve: d_1(function (i) {
-					return this.__list__[i];
-				}),
-				_unBind: d_1(function () {
-					this.__list__ = null;
-					delete this.__redo__;
-					if (!this.__context__) { return; }
-					this.__context__.off("_add", this._onAdd);
-					this.__context__.off("_delete", this._onDelete);
-					this.__context__.off("_clear", this._onClear);
-					this.__context__ = null;
-				}),
-				toString: d_1(function () {
-					return "[object " + (this[es6Symbol$1.toStringTag] || "Object") + "]";
-				})
-			},
-			autoBind({
-				_onAdd: d_1(function (index) {
-					if (index >= this.__nextIndex__) { return; }
-					++this.__nextIndex__;
-					if (!this.__redo__) {
-						defineProperty$6(this, "__redo__", d_1("c", [index]));
-						return;
-					}
-					this.__redo__.forEach(function (redo, i) {
-						if (redo >= index) { this.__redo__[i] = ++redo; }
-					}, this);
-					this.__redo__.push(index);
-				}),
-				_onDelete: d_1(function (index) {
-					var i;
-					if (index >= this.__nextIndex__) { return; }
-					--this.__nextIndex__;
-					if (!this.__redo__) { return; }
-					i = this.__redo__.indexOf(index);
-					if (i !== -1) { this.__redo__.splice(i, 1); }
-					this.__redo__.forEach(function (redo, j) {
-						if (redo > index) { this.__redo__[j] = --redo; }
-					}, this);
-				}),
-				_onClear: d_1(function () {
-					if (this.__redo__) { clear.call(this.__redo__); }
-					this.__nextIndex__ = 0;
-				})
-			})
-		)
-	);
-
-	defineProperty$6(
-		Iterator.prototype,
-		es6Symbol$1.iterator,
-		d_1(function () {
-			return this;
-		})
-	);
-
-	var array = createCommonjsModule(function (module) {
-
-
-
-	var defineProperty = Object.defineProperty, ArrayIterator;
-
-	ArrayIterator = module.exports = function (arr, kind) {
-		if (!(this instanceof ArrayIterator)) { throw new TypeError("Constructor requires 'new'"); }
-		es6Iterator.call(this, arr);
-		if (!kind) { kind = "value"; }
-		else if (contains.call(kind, "key+value")) { kind = "key+value"; }
-		else if (contains.call(kind, "key")) { kind = "key"; }
-		else { kind = "value"; }
-		defineProperty(this, "__kind__", d_1("", kind));
+	var $getOwnPropertySymbols = function getOwnPropertySymbols(O) {
+	  var IS_OBJECT_PROTOTYPE = O === ObjectPrototype;
+	  var names = nativeGetOwnPropertyNames$1(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject(O));
+	  var result = [];
+	  $forEach(names, function (key) {
+	    if (has(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has(ObjectPrototype, key))) {
+	      result.push(AllSymbols[key]);
+	    }
+	  });
+	  return result;
 	};
-	if (setPrototypeOf) { setPrototypeOf(ArrayIterator, es6Iterator); }
 
-	// Internal %ArrayIteratorPrototype% doesn't expose its constructor
-	delete ArrayIterator.prototype.constructor;
+	// `Symbol` constructor
+	// https://tc39.github.io/ecma262/#sec-symbol-constructor
+	if (!nativeSymbol) {
+	  $Symbol = function Symbol() {
+	    if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor');
+	    var description = !arguments.length || arguments[0] === undefined ? undefined : String(arguments[0]);
+	    var tag = uid(description);
+	    var setter = function (value) {
+	      if (this === ObjectPrototype) setter.call(ObjectPrototypeSymbols, value);
+	      if (has(this, HIDDEN) && has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
+	      setSymbolDescriptor(this, tag, createPropertyDescriptor(1, value));
+	    };
+	    if (descriptors && USE_SETTER) setSymbolDescriptor(ObjectPrototype, tag, { configurable: true, set: setter });
+	    return wrap(tag, description);
+	  };
 
-	ArrayIterator.prototype = Object.create(es6Iterator.prototype, {
-		_resolve: d_1(function (i) {
-			if (this.__kind__ === "value") { return this.__list__[i]; }
-			if (this.__kind__ === "key+value") { return [i, this.__list__[i]]; }
-			return i;
-		})
-	});
-	defineProperty(ArrayIterator.prototype, es6Symbol$1.toStringTag, d_1("c", "Array Iterator"));
-	});
+	  redefine($Symbol[PROTOTYPE$1], 'toString', function toString() {
+	    return getInternalState(this).tag;
+	  });
 
-	var string = createCommonjsModule(function (module) {
+	  redefine($Symbol, 'withoutSetter', function (description) {
+	    return wrap(uid(description), description);
+	  });
 
+	  objectPropertyIsEnumerable.f = $propertyIsEnumerable;
+	  objectDefineProperty.f = $defineProperty;
+	  objectGetOwnPropertyDescriptor.f = $getOwnPropertyDescriptor;
+	  objectGetOwnPropertyNames.f = objectGetOwnPropertyNamesExternal.f = $getOwnPropertyNames;
+	  objectGetOwnPropertySymbols.f = $getOwnPropertySymbols;
 
+	  wellKnownSymbolWrapped.f = function (name) {
+	    return wrap(wellKnownSymbol(name), name);
+	  };
 
-	var defineProperty = Object.defineProperty, StringIterator;
+	  if (descriptors) {
+	    // https://github.com/tc39/proposal-Symbol-description
+	    nativeDefineProperty$1($Symbol[PROTOTYPE$1], 'description', {
+	      configurable: true,
+	      get: function description() {
+	        return getInternalState(this).description;
+	      }
+	    });
+	    {
+	      redefine(ObjectPrototype, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });
+	    }
+	  }
+	}
 
-	StringIterator = module.exports = function (str) {
-		if (!(this instanceof StringIterator)) { throw new TypeError("Constructor requires 'new'"); }
-		str = String(str);
-		es6Iterator.call(this, str);
-		defineProperty(this, "__length__", d_1("", str.length));
-	};
-	if (setPrototypeOf) { setPrototypeOf(StringIterator, es6Iterator); }
-
-	// Internal %ArrayIteratorPrototype% doesn't expose its constructor
-	delete StringIterator.prototype.constructor;
-
-	StringIterator.prototype = Object.create(es6Iterator.prototype, {
-		_next: d_1(function () {
-			if (!this.__list__) { return undefined; }
-			if (this.__nextIndex__ < this.__length__) { return this.__nextIndex__++; }
-			this._unBind();
-			return undefined;
-		}),
-		_resolve: d_1(function (i) {
-			var char = this.__list__[i], code;
-			if (this.__nextIndex__ === this.__length__) { return char; }
-			code = char.charCodeAt(0);
-			if (code >= 0xd800 && code <= 0xdbff) { return char + this.__list__[this.__nextIndex__++]; }
-			return char;
-		})
+	_export({ global: true, wrap: true, forced: !nativeSymbol, sham: !nativeSymbol }, {
+	  Symbol: $Symbol
 	});
-	defineProperty(StringIterator.prototype, es6Symbol$1.toStringTag, d_1("c", "String Iterator"));
+
+	$forEach(objectKeys(WellKnownSymbolsStore$1), function (name) {
+	  defineWellKnownSymbol(name);
 	});
 
-	var iteratorSymbol$2 = es6Symbol$1.iterator;
+	_export({ target: SYMBOL, stat: true, forced: !nativeSymbol }, {
+	  // `Symbol.for` method
+	  // https://tc39.github.io/ecma262/#sec-symbol.for
+	  'for': function (key) {
+	    var string = String(key);
+	    if (has(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];
+	    var symbol = $Symbol(string);
+	    StringToSymbolRegistry[string] = symbol;
+	    SymbolToStringRegistry[symbol] = string;
+	    return symbol;
+	  },
+	  // `Symbol.keyFor` method
+	  // https://tc39.github.io/ecma262/#sec-symbol.keyfor
+	  keyFor: function keyFor(sym) {
+	    if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol');
+	    if (has(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
+	  },
+	  useSetter: function () { USE_SETTER = true; },
+	  useSimple: function () { USE_SETTER = false; }
+	});
 
-	var get = function (obj) {
-		if (typeof validIterable(obj)[iteratorSymbol$2] === "function") { return obj[iteratorSymbol$2](); }
-		if (isArguments(obj)) { return new array(obj); }
-		if (isString(obj)) { return new string(obj); }
-		return new array(obj);
-	};
+	_export({ target: 'Object', stat: true, forced: !nativeSymbol, sham: !descriptors }, {
+	  // `Object.create` method
+	  // https://tc39.github.io/ecma262/#sec-object.create
+	  create: $create,
+	  // `Object.defineProperty` method
+	  // https://tc39.github.io/ecma262/#sec-object.defineproperty
+	  defineProperty: $defineProperty,
+	  // `Object.defineProperties` method
+	  // https://tc39.github.io/ecma262/#sec-object.defineproperties
+	  defineProperties: $defineProperties,
+	  // `Object.getOwnPropertyDescriptor` method
+	  // https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptors
+	  getOwnPropertyDescriptor: $getOwnPropertyDescriptor
+	});
 
-	var isArray$2 = Array.isArray, call$3 = Function.prototype.call, some = Array.prototype.some;
-
-	var forOf = function (iterable, cb /*, thisArg*/) {
-		var mode, thisArg = arguments[2], result, doBreak, broken, i, length, char, code;
-		if (isArray$2(iterable) || isArguments(iterable)) { mode = "array"; }
-		else if (isString(iterable)) { mode = "string"; }
-		else { iterable = get(iterable); }
-
-		validCallable(cb);
-		doBreak = function () {
-			broken = true;
-		};
-		if (mode === "array") {
-			some.call(iterable, function (value) {
-				call$3.call(cb, thisArg, value, doBreak);
-				return broken;
-			});
-			return;
-		}
-		if (mode === "string") {
-			length = iterable.length;
-			for (i = 0; i < length; ++i) {
-				char = iterable[i];
-				if (i + 1 < length) {
-					code = char.charCodeAt(0);
-					if (code >= 0xd800 && code <= 0xdbff) { char += iterable[++i]; }
-				}
-				call$3.call(cb, thisArg, char, doBreak);
-				if (broken) { break; }
-			}
-			return;
-		}
-		result = iterable.next();
-
-		while (!result.done) {
-			call$3.call(cb, thisArg, result.value, doBreak);
-			if (broken) { return; }
-			result = iterable.next();
-		}
-	};
+	_export({ target: 'Object', stat: true, forced: !nativeSymbol }, {
+	  // `Object.getOwnPropertyNames` method
+	  // https://tc39.github.io/ecma262/#sec-object.getownpropertynames
+	  getOwnPropertyNames: $getOwnPropertyNames,
+	  // `Object.getOwnPropertySymbols` method
+	  // https://tc39.github.io/ecma262/#sec-object.getownpropertysymbols
+	  getOwnPropertySymbols: $getOwnPropertySymbols
+	});
 
-	var iterator = createCommonjsModule(function (module) {
+	// Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives
+	// https://bugs.chromium.org/p/v8/issues/detail?id=3443
+	_export({ target: 'Object', stat: true, forced: fails(function () { objectGetOwnPropertySymbols.f(1); }) }, {
+	  getOwnPropertySymbols: function getOwnPropertySymbols(it) {
+	    return objectGetOwnPropertySymbols.f(toObject(it));
+	  }
+	});
 
-	var toStringTagSymbol = es6Symbol.toStringTag
+	// `JSON.stringify` method behavior with symbols
+	// https://tc39.github.io/ecma262/#sec-json.stringify
+	if ($stringify) {
+	  var FORCED_JSON_STRINGIFY = !nativeSymbol || fails(function () {
+	    var symbol = $Symbol();
+	    // MS Edge converts symbol values to JSON as {}
+	    return $stringify([symbol]) != '[null]'
+	      // WebKit converts symbol values to JSON as null
+	      || $stringify({ a: symbol }) != '{}'
+	      // V8 throws on boxed symbols
+	      || $stringify(Object(symbol)) != '{}';
+	  });
 
-	  , defineProperty = Object.defineProperty
-	  , SetIterator;
+	  _export({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {
+	    // eslint-disable-next-line no-unused-vars
+	    stringify: function stringify(it, replacer, space) {
+	      var args = [it];
+	      var index = 1;
+	      var $replacer;
+	      while (arguments.length > index) args.push(arguments[index++]);
+	      $replacer = replacer;
+	      if (!isObject(replacer) && it === undefined || isSymbol(it)) return; // IE8 returns string on undefined
+	      if (!isArray(replacer)) replacer = function (key, value) {
+	        if (typeof $replacer == 'function') value = $replacer.call(this, key, value);
+	        if (!isSymbol(value)) return value;
+	      };
+	      args[1] = replacer;
+	      return $stringify.apply(null, args);
+	    }
+	  });
+	}
 
-	SetIterator = module.exports = function (set, kind) {
-		if (!(this instanceof SetIterator)) { return new SetIterator(set, kind); }
-		es6Iterator.call(this, set.__setData__, set);
-		if (!kind) { kind = 'value'; }
-		else if (contains.call(kind, 'key+value')) { kind = 'key+value'; }
-		else { kind = 'value'; }
-		defineProperty(this, '__kind__', d_1('', kind));
-	};
-	if (setPrototypeOf) { setPrototypeOf(SetIterator, es6Iterator); }
-
-	SetIterator.prototype = Object.create(es6Iterator.prototype, {
-		constructor: d_1(SetIterator),
-		_resolve: d_1(function (i) {
-			if (this.__kind__ === 'value') { return this.__list__[i]; }
-			return [this.__list__[i], this.__list__[i]];
-		}),
-		toString: d_1(function () { return '[object Set Iterator]'; })
-	});
-	defineProperty(SetIterator.prototype, toStringTagSymbol, d_1('c', 'Set Iterator'));
-	});
+	// `Symbol.prototype[@@toPrimitive]` method
+	// https://tc39.github.io/ecma262/#sec-symbol.prototype-@@toprimitive
+	if (!$Symbol[PROTOTYPE$1][TO_PRIMITIVE]) {
+	  createNonEnumerableProperty($Symbol[PROTOTYPE$1], TO_PRIMITIVE, $Symbol[PROTOTYPE$1].valueOf);
+	}
+	// `Symbol.prototype[@@toStringTag]` property
+	// https://tc39.github.io/ecma262/#sec-symbol.prototype-@@tostringtag
+	setToStringTag($Symbol, SYMBOL);
 
-	// Exports true if environment provides native `Set` implementation,
-
-	var isNativeImplemented = (function () {
-		if (typeof Set === 'undefined') { return false; }
-		return (Object.prototype.toString.call(Set.prototype) === '[object Set]');
-	}());
-
-	var iterator$1       = validIterable
-
-	  , call$4 = Function.prototype.call
-	  , defineProperty$7 = Object.defineProperty, getPrototypeOf$1 = Object.getPrototypeOf
-	  , SetPoly, getValues, NativeSet;
-
-	if (isNativeImplemented) { NativeSet = Set; }
-
-	var polyfill$2 = SetPoly = function Set(/*iterable*/) {
-		var iterable = arguments[0], self;
-		if (!(this instanceof SetPoly)) { throw new TypeError('Constructor requires \'new\''); }
-		if (isNativeImplemented && setPrototypeOf) { self = setPrototypeOf(new NativeSet(), getPrototypeOf$1(this)); }
-		else { self = this; }
-		if (iterable != null) { iterator$1(iterable); }
-		defineProperty$7(self, '__setData__', d_1('c', []));
-		if (!iterable) { return self; }
-		forOf(iterable, function (value) {
-			if (eIndexOf.call(this, value) !== -1) { return; }
-			this.push(value);
-		}, self.__setData__);
-		return self;
-	};
+	hiddenKeys[HIDDEN] = true;
 
-	if (isNativeImplemented) {
-		if (setPrototypeOf) { setPrototypeOf(SetPoly, NativeSet); }
-		SetPoly.prototype = Object.create(NativeSet.prototype, { constructor: d_1(SetPoly) });
-	}
-
-	eventEmitter(Object.defineProperties(SetPoly.prototype, {
-		add: d_1(function (value) {
-			if (this.has(value)) { return this; }
-			this.emit('_add', this.__setData__.push(value) - 1, value);
-			return this;
-		}),
-		clear: d_1(function () {
-			if (!this.__setData__.length) { return; }
-			clear.call(this.__setData__);
-			this.emit('_clear');
-		}),
-		delete: d_1(function (value) {
-			var index = eIndexOf.call(this.__setData__, value);
-			if (index === -1) { return false; }
-			this.__setData__.splice(index, 1);
-			this.emit('_delete', index, value);
-			return true;
-		}),
-		entries: d_1(function () { return new iterator(this, 'key+value'); }),
-		forEach: d_1(function (cb/*, thisArg*/) {
-			var thisArg = arguments[1], iterator, result, value;
-			validCallable(cb);
-			iterator = this.values();
-			result = iterator._next();
-			while (result !== undefined) {
-				value = iterator._resolve(result);
-				call$4.call(cb, thisArg, value, value, this);
-				result = iterator._next();
-			}
-		}),
-		has: d_1(function (value) {
-			return (eIndexOf.call(this.__setData__, value) !== -1);
-		}),
-		keys: d_1(getValues = function () { return this.values(); }),
-		size: d_1.gs(function () { return this.__setData__.length; }),
-		values: d_1(function () { return new iterator(this); }),
-		toString: d_1(function () { return '[object Set]'; })
-	}));
-	defineProperty$7(SetPoly.prototype, es6Symbol.iterator, d_1(getValues));
-	defineProperty$7(SetPoly.prototype, es6Symbol.toStringTag, d_1('c', 'Set'));
-
-	var es6Set = isImplemented() ? Set : polyfill$2;
-
-	var isImplemented$b = function () {
-		var map, iterator, result;
-		if (typeof Map !== 'function') { return false; }
-		try {
-			// WebKit doesn't support arguments and crashes
-			map = new Map([['raz', 'one'], ['dwa', 'two'], ['trzy', 'three']]);
-		} catch (e) {
-			return false;
-		}
-		if (String(map) !== '[object Map]') { return false; }
-		if (map.size !== 3) { return false; }
-		if (typeof map.clear !== 'function') { return false; }
-		if (typeof map.delete !== 'function') { return false; }
-		if (typeof map.entries !== 'function') { return false; }
-		if (typeof map.forEach !== 'function') { return false; }
-		if (typeof map.get !== 'function') { return false; }
-		if (typeof map.has !== 'function') { return false; }
-		if (typeof map.keys !== 'function') { return false; }
-		if (typeof map.set !== 'function') { return false; }
-		if (typeof map.values !== 'function') { return false; }
-
-		iterator = map.entries();
-		result = iterator.next();
-		if (result.done !== false) { return false; }
-		if (!result.value) { return false; }
-		if (result.value[0] !== 'raz') { return false; }
-		if (result.value[1] !== 'one') { return false; }
-
-		return true;
-	};
+	var defineProperty$2 = objectDefineProperty.f;
 
-	var forEach$2 = Array.prototype.forEach, create$6 = Object.create;
 
-	// eslint-disable-next-line no-unused-vars
-	var primitiveSet = function (arg/*, …args*/) {
-		var set = create$6(null);
-		forEach$2.call(arguments, function (name) { set[name] = true; });
-		return set;
-	};
+	var NativeSymbol = global_1.Symbol;
 
-	var iteratorKinds = primitiveSet('key',
-		'value', 'key+value');
+	if (descriptors && typeof NativeSymbol == 'function' && (!('description' in NativeSymbol.prototype) ||
+	  // Safari 12 bug
+	  NativeSymbol().description !== undefined
+	)) {
+	  var EmptyStringDescriptionStore = {};
+	  // wrap Symbol constructor for correct work with undefined description
+	  var SymbolWrapper = function Symbol() {
+	    var description = arguments.length < 1 || arguments[0] === undefined ? undefined : String(arguments[0]);
+	    var result = this instanceof SymbolWrapper
+	      ? new NativeSymbol(description)
+	      // in Edge 13, String(Symbol(undefined)) === 'Symbol(undefined)'
+	      : description === undefined ? NativeSymbol() : NativeSymbol(description);
+	    if (description === '') EmptyStringDescriptionStore[result] = true;
+	    return result;
+	  };
+	  copyConstructorProperties(SymbolWrapper, NativeSymbol);
+	  var symbolPrototype = SymbolWrapper.prototype = NativeSymbol.prototype;
+	  symbolPrototype.constructor = SymbolWrapper;
 
-	var iterator$2 = createCommonjsModule(function (module) {
+	  var symbolToString = symbolPrototype.toString;
+	  var native = String(NativeSymbol('test')) == 'Symbol(test)';
+	  var regexp = /^Symbol\((.*)\)[^)]+$/;
+	  defineProperty$2(symbolPrototype, 'description', {
+	    configurable: true,
+	    get: function description() {
+	      var symbol = isObject(this) ? this.valueOf() : this;
+	      var string = symbolToString.call(symbol);
+	      if (has(EmptyStringDescriptionStore, symbol)) return '';
+	      var desc = native ? string.slice(7, -1) : string.replace(regexp, '$1');
+	      return desc === '' ? undefined : desc;
+	    }
+	  });
 
-	var toStringTagSymbol = es6Symbol$1.toStringTag
+	  _export({ global: true, forced: true }, {
+	    Symbol: SymbolWrapper
+	  });
+	}
 
-	  , defineProperties = Object.defineProperties
-	  , unBind = es6Iterator.prototype._unBind
-	  , MapIterator;
+	// `Symbol.iterator` well-known symbol
+	// https://tc39.github.io/ecma262/#sec-symbol.iterator
+	defineWellKnownSymbol('iterator');
 
-	MapIterator = module.exports = function (map, kind) {
-		if (!(this instanceof MapIterator)) { return new MapIterator(map, kind); }
-		es6Iterator.call(this, map.__mapKeysData__, map);
-		if (!kind || !iteratorKinds[kind]) { kind = 'key+value'; }
-		defineProperties(this, {
-			__kind__: d_1('', kind),
-			__values__: d_1('w', map.__mapValuesData__)
-		});
+	var arrayMethodIsStrict = function (METHOD_NAME, argument) {
+	  var method = [][METHOD_NAME];
+	  return !!method && fails(function () {
+	    // eslint-disable-next-line no-useless-call,no-throw-literal
+	    method.call(null, argument || function () { throw 1; }, 1);
+	  });
 	};
-	if (setPrototypeOf) { setPrototypeOf(MapIterator, es6Iterator); }
-
-	MapIterator.prototype = Object.create(es6Iterator.prototype, {
-		constructor: d_1(MapIterator),
-		_resolve: d_1(function (i) {
-			if (this.__kind__ === 'value') { return this.__values__[i]; }
-			if (this.__kind__ === 'key') { return this.__list__[i]; }
-			return [this.__list__[i], this.__values__[i]];
-		}),
-		_unBind: d_1(function () {
-			this.__values__ = null;
-			unBind.call(this);
-		}),
-		toString: d_1(function () { return '[object Map Iterator]'; })
-	});
-	Object.defineProperty(MapIterator.prototype, toStringTagSymbol,
-		d_1('c', 'Map Iterator'));
-	});
 
-	// Exports true if environment provides native `Map` implementation,
-
-	var isNativeImplemented$1 = (function () {
-		if (typeof Map === 'undefined') { return false; }
-		return (Object.prototype.toString.call(new Map()) === '[object Map]');
-	}());
-
-	var iterator$3       = validIterable
-
-	  , call$5 = Function.prototype.call
-	  , defineProperties$3 = Object.defineProperties, getPrototypeOf$2 = Object.getPrototypeOf
-	  , MapPoly;
-
-	var polyfill$3 = MapPoly = function (/*iterable*/) {
-		var iterable = arguments[0], keys, values, self;
-		if (!(this instanceof MapPoly)) { throw new TypeError('Constructor requires \'new\''); }
-		if (isNativeImplemented$1 && setPrototypeOf && (Map !== MapPoly)) {
-			self = setPrototypeOf(new Map(), getPrototypeOf$2(this));
-		} else {
-			self = this;
-		}
-		if (iterable != null) { iterator$3(iterable); }
-		defineProperties$3(self, {
-			__mapKeysData__: d_1('c', keys = []),
-			__mapValuesData__: d_1('c', values = [])
-		});
-		if (!iterable) { return self; }
-		forOf(iterable, function (value) {
-			var key = validValue(value)[0];
-			value = value[1];
-			if (eIndexOf.call(keys, key) !== -1) { return; }
-			keys.push(key);
-			values.push(value);
-		}, self);
-		return self;
-	};
+	var defineProperty$3 = Object.defineProperty;
+	var cache = {};
 
-	if (isNativeImplemented$1) {
-		if (setPrototypeOf) { setPrototypeOf(MapPoly, Map); }
-		MapPoly.prototype = Object.create(Map.prototype, {
-			constructor: d_1(MapPoly)
-		});
-	}
-
-	eventEmitter(defineProperties$3(MapPoly.prototype, {
-		clear: d_1(function () {
-			if (!this.__mapKeysData__.length) { return; }
-			clear.call(this.__mapKeysData__);
-			clear.call(this.__mapValuesData__);
-			this.emit('_clear');
-		}),
-		delete: d_1(function (key) {
-			var index = eIndexOf.call(this.__mapKeysData__, key);
-			if (index === -1) { return false; }
-			this.__mapKeysData__.splice(index, 1);
-			this.__mapValuesData__.splice(index, 1);
-			this.emit('_delete', index, key);
-			return true;
-		}),
-		entries: d_1(function () { return new iterator$2(this, 'key+value'); }),
-		forEach: d_1(function (cb/*, thisArg*/) {
-			var thisArg = arguments[1], iterator, result;
-			validCallable(cb);
-			iterator = this.entries();
-			result = iterator._next();
-			while (result !== undefined) {
-				call$5.call(cb, thisArg, this.__mapValuesData__[result],
-					this.__mapKeysData__[result], this);
-				result = iterator._next();
-			}
-		}),
-		get: d_1(function (key) {
-			var index = eIndexOf.call(this.__mapKeysData__, key);
-			if (index === -1) { return; }
-			return this.__mapValuesData__[index];
-		}),
-		has: d_1(function (key) {
-			return (eIndexOf.call(this.__mapKeysData__, key) !== -1);
-		}),
-		keys: d_1(function () { return new iterator$2(this, 'key'); }),
-		set: d_1(function (key, value) {
-			var index = eIndexOf.call(this.__mapKeysData__, key), emit;
-			if (index === -1) {
-				index = this.__mapKeysData__.push(key) - 1;
-				emit = true;
-			}
-			this.__mapValuesData__[index] = value;
-			if (emit) { this.emit('_add', index, key); }
-			return this;
-		}),
-		size: d_1.gs(function () { return this.__mapKeysData__.length; }),
-		values: d_1(function () { return new iterator$2(this, 'value'); }),
-		toString: d_1(function () { return '[object Map]'; })
-	}));
-	Object.defineProperty(MapPoly.prototype, es6Symbol$1.iterator, d_1(function () {
-		return this.entries();
-	}));
-	Object.defineProperty(MapPoly.prototype, es6Symbol$1.toStringTag, d_1('c', 'Map'));
-
-	var es6Map = isImplemented$b() ? Map : polyfill$3;
-
-	var toStr = Object.prototype.toString;
-
-	var isArguments$1 = function isArguments(value) {
-		var str = toStr.call(value);
-		var isArgs = str === '[object Arguments]';
-		if (!isArgs) {
-			isArgs = str !== '[object Array]' &&
-				value !== null &&
-				typeof value === 'object' &&
-				typeof value.length === 'number' &&
-				value.length >= 0 &&
-				toStr.call(value.callee) === '[object Function]';
-		}
-		return isArgs;
-	};
+	var thrower = function (it) { throw it; };
 
-	var keysShim;
-	if (!Object.keys) {
-		// modified from https://github.com/es-shims/es5-shim
-		var has = Object.prototype.hasOwnProperty;
-		var toStr$1 = Object.prototype.toString;
-		var isArgs = isArguments$1; // eslint-disable-line global-require
-		var isEnumerable = Object.prototype.propertyIsEnumerable;
-		var hasDontEnumBug = !isEnumerable.call({ toString: null }, 'toString');
-		var hasProtoEnumBug = isEnumerable.call(function () {}, 'prototype');
-		var dontEnums = [
-			'toString',
-			'toLocaleString',
-			'valueOf',
-			'hasOwnProperty',
-			'isPrototypeOf',
-			'propertyIsEnumerable',
-			'constructor'
-		];
-		var equalsConstructorPrototype = function (o) {
-			var ctor = o.constructor;
-			return ctor && ctor.prototype === o;
-		};
-		var excludedKeys = {
-			$applicationCache: true,
-			$console: true,
-			$external: true,
-			$frame: true,
-			$frameElement: true,
-			$frames: true,
-			$innerHeight: true,
-			$innerWidth: true,
-			$onmozfullscreenchange: true,
-			$onmozfullscreenerror: true,
-			$outerHeight: true,
-			$outerWidth: true,
-			$pageXOffset: true,
-			$pageYOffset: true,
-			$parent: true,
-			$scrollLeft: true,
-			$scrollTop: true,
-			$scrollX: true,
-			$scrollY: true,
-			$self: true,
-			$webkitIndexedDB: true,
-			$webkitStorageInfo: true,
-			$window: true
-		};
-		var hasAutomationEqualityBug = (function () {
-			/* global window */
-			if (typeof window === 'undefined') { return false; }
-			for (var k in window) {
-				try {
-					if (!excludedKeys['$' + k] && has.call(window, k) && window[k] !== null && typeof window[k] === 'object') {
-						try {
-							equalsConstructorPrototype(window[k]);
-						} catch (e) {
-							return true;
-						}
-					}
-				} catch (e$1) {
-					return true;
-				}
-			}
-			return false;
-		}());
-		var equalsConstructorPrototypeIfNotBuggy = function (o) {
-			/* global window */
-			if (typeof window === 'undefined' || !hasAutomationEqualityBug) {
-				return equalsConstructorPrototype(o);
-			}
-			try {
-				return equalsConstructorPrototype(o);
-			} catch (e) {
-				return false;
-			}
-		};
+	var arrayMethodUsesToLength = function (METHOD_NAME, options) {
+	  if (has(cache, METHOD_NAME)) return cache[METHOD_NAME];
+	  if (!options) options = {};
+	  var method = [][METHOD_NAME];
+	  var ACCESSORS = has(options, 'ACCESSORS') ? options.ACCESSORS : false;
+	  var argument0 = has(options, 0) ? options[0] : thrower;
+	  var argument1 = has(options, 1) ? options[1] : undefined;
 
-		keysShim = function keys(object) {
-			var isObject = object !== null && typeof object === 'object';
-			var isFunction = toStr$1.call(object) === '[object Function]';
-			var isArguments = isArgs(object);
-			var isString = isObject && toStr$1.call(object) === '[object String]';
-			var theKeys = [];
+	  return cache[METHOD_NAME] = !!method && !fails(function () {
+	    if (ACCESSORS && !descriptors) return true;
+	    var O = { length: -1 };
 
-			if (!isObject && !isFunction && !isArguments) {
-				throw new TypeError('Object.keys called on a non-object');
-			}
+	    if (ACCESSORS) defineProperty$3(O, 1, { enumerable: true, get: thrower });
+	    else O[1] = 1;
 
-			var skipProto = hasProtoEnumBug && isFunction;
-			if (isString && object.length > 0 && !has.call(object, 0)) {
-				for (var i = 0; i < object.length; ++i) {
-					theKeys.push(String(i));
-				}
-			}
+	    method.call(O, argument0, argument1);
+	  });
+	};
 
-			if (isArguments && object.length > 0) {
-				for (var j = 0; j < object.length; ++j) {
-					theKeys.push(String(j));
-				}
-			} else {
-				for (var name in object) {
-					if (!(skipProto && name === 'prototype') && has.call(object, name)) {
-						theKeys.push(String(name));
-					}
-				}
-			}
+	var $forEach$1 = arrayIteration.forEach;
 
-			if (hasDontEnumBug) {
-				var skipConstructor = equalsConstructorPrototypeIfNotBuggy(object);
 
-				for (var k = 0; k < dontEnums.length; ++k) {
-					if (!(skipConstructor && dontEnums[k] === 'constructor') && has.call(object, dontEnums[k])) {
-						theKeys.push(dontEnums[k]);
-					}
-				}
-			}
-			return theKeys;
-		};
-	}
-	var implementation$1 = keysShim;
 
-	var slice = Array.prototype.slice;
+	var STRICT_METHOD = arrayMethodIsStrict('forEach');
+	var USES_TO_LENGTH = arrayMethodUsesToLength('forEach');
 
+	// `Array.prototype.forEach` method implementation
+	// https://tc39.github.io/ecma262/#sec-array.prototype.foreach
+	var arrayForEach = (!STRICT_METHOD || !USES_TO_LENGTH) ? function forEach(callbackfn /* , thisArg */) {
+	  return $forEach$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	} : [].forEach;
 
-	var origKeys = Object.keys;
-	var keysShim$1 = origKeys ? function keys(o) { return origKeys(o); } : implementation$1;
+	// `Array.prototype.forEach` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.foreach
+	_export({ target: 'Array', proto: true, forced: [].forEach != arrayForEach }, {
+	  forEach: arrayForEach
+	});
 
-	var originalKeys = Object.keys;
+	var $indexOf = arrayIncludes.indexOf;
 
-	keysShim$1.shim = function shimObjectKeys() {
-		if (Object.keys) {
-			var keysWorksWithArguments = (function () {
-				// Safari 5.0 bug
-				var args = Object.keys(arguments);
-				return args && args.length === arguments.length;
-			}(1, 2));
-			if (!keysWorksWithArguments) {
-				Object.keys = function keys(object) { // eslint-disable-line func-name-matching
-					if (isArguments$1(object)) {
-						return originalKeys(slice.call(object));
-					}
-					return originalKeys(object);
-				};
-			}
-		} else {
-			Object.keys = keysShim$1;
-		}
-		return Object.keys || keysShim$1;
-	};
 
-	var objectKeys = keysShim$1;
 
-	var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';
+	var nativeIndexOf = [].indexOf;
 
-	var toStr$2 = Object.prototype.toString;
-	var concat = Array.prototype.concat;
-	var origDefineProperty = Object.defineProperty;
+	var NEGATIVE_ZERO = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;
+	var STRICT_METHOD$1 = arrayMethodIsStrict('indexOf');
+	var USES_TO_LENGTH$1 = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });
 
-	var isFunction$1 = function (fn) {
-		return typeof fn === 'function' && toStr$2.call(fn) === '[object Function]';
-	};
+	// `Array.prototype.indexOf` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.indexof
+	_export({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || !STRICT_METHOD$1 || !USES_TO_LENGTH$1 }, {
+	  indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
+	    return NEGATIVE_ZERO
+	      // convert -0 to +0
+	      ? nativeIndexOf.apply(this, arguments) || 0
+	      : $indexOf(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	var arePropertyDescriptorsSupported = function () {
-		var obj = {};
-		try {
-			origDefineProperty(obj, 'x', { enumerable: false, value: obj });
-			// eslint-disable-next-line no-unused-vars, no-restricted-syntax
-			for (var _ in obj) { // jscs:ignore disallowUnusedVariables
-				return false;
-			}
-			return obj.x === obj;
-		} catch (e) { /* this is IE 8. */
-			return false;
-		}
-	};
-	var supportsDescriptors = origDefineProperty && arePropertyDescriptorsSupported();
-
-	var defineProperty$8 = function (object, name, value, predicate) {
-		if (name in object && (!isFunction$1(predicate) || !predicate())) {
-			return;
-		}
-		if (supportsDescriptors) {
-			origDefineProperty(object, name, {
-				configurable: true,
-				enumerable: false,
-				value: value,
-				writable: true
-			});
-		} else {
-			object[name] = value;
-		}
-	};
+	// `Array.isArray` method
+	// https://tc39.github.io/ecma262/#sec-array.isarray
+	_export({ target: 'Array', stat: true }, {
+	  isArray: isArray
+	});
 
-	var defineProperties$4 = function (object, map) {
-		var predicates = arguments.length > 2 ? arguments[2] : {};
-		var props = objectKeys(map);
-		if (hasSymbols) {
-			props = concat.call(props, Object.getOwnPropertySymbols(map));
-		}
-		for (var i = 0; i < props.length; i += 1) {
-			defineProperty$8(object, props[i], map[props[i]], predicates[props[i]]);
-		}
-	};
+	var UNSCOPABLES = wellKnownSymbol('unscopables');
+	var ArrayPrototype = Array.prototype;
 
-	defineProperties$4.supportsDescriptors = !!supportsDescriptors;
+	// Array.prototype[@@unscopables]
+	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
+	if (ArrayPrototype[UNSCOPABLES] == undefined) {
+	  objectDefineProperty.f(ArrayPrototype, UNSCOPABLES, {
+	    configurable: true,
+	    value: objectCreate(null)
+	  });
+	}
 
-	var defineProperties_1 = defineProperties$4;
+	// add a key to Array.prototype[@@unscopables]
+	var addToUnscopables = function (key) {
+	  ArrayPrototype[UNSCOPABLES][key] = true;
+	};
 
-	/* eslint complexity: [2, 18], max-statements: [2, 33] */
-	var shams = function hasSymbols() {
-		if (typeof Symbol !== 'function' || typeof Object.getOwnPropertySymbols !== 'function') { return false; }
-		if (typeof Symbol.iterator === 'symbol') { return true; }
+	var iterators = {};
 
-		var obj = {};
-		var sym = Symbol('test');
-		var symObj = Object(sym);
-		if (typeof sym === 'string') { return false; }
+	var correctPrototypeGetter = !fails(function () {
+	  function F() { /* empty */ }
+	  F.prototype.constructor = null;
+	  return Object.getPrototypeOf(new F()) !== F.prototype;
+	});
 
-		if (Object.prototype.toString.call(sym) !== '[object Symbol]') { return false; }
-		if (Object.prototype.toString.call(symObj) !== '[object Symbol]') { return false; }
+	var IE_PROTO$1 = sharedKey('IE_PROTO');
+	var ObjectPrototype$1 = Object.prototype;
 
-		// temp disabled per https://github.com/ljharb/object.assign/issues/17
-		// if (sym instanceof Symbol) { return false; }
-		// temp disabled per https://github.com/WebReflection/get-own-property-symbols/issues/4
-		// if (!(symObj instanceof Symbol)) { return false; }
+	// `Object.getPrototypeOf` method
+	// https://tc39.github.io/ecma262/#sec-object.getprototypeof
+	var objectGetPrototypeOf = correctPrototypeGetter ? Object.getPrototypeOf : function (O) {
+	  O = toObject(O);
+	  if (has(O, IE_PROTO$1)) return O[IE_PROTO$1];
+	  if (typeof O.constructor == 'function' && O instanceof O.constructor) {
+	    return O.constructor.prototype;
+	  } return O instanceof Object ? ObjectPrototype$1 : null;
+	};
 
-		// if (typeof Symbol.prototype.toString !== 'function') { return false; }
-		// if (String(sym) !== Symbol.prototype.toString.call(sym)) { return false; }
+	var ITERATOR = wellKnownSymbol('iterator');
+	var BUGGY_SAFARI_ITERATORS = false;
 
-		var symVal = 42;
-		obj[sym] = symVal;
-		for (sym in obj) { return false; } // eslint-disable-line no-restricted-syntax
-		if (typeof Object.keys === 'function' && Object.keys(obj).length !== 0) { return false; }
+	var returnThis = function () { return this; };
 
-		if (typeof Object.getOwnPropertyNames === 'function' && Object.getOwnPropertyNames(obj).length !== 0) { return false; }
+	// `%IteratorPrototype%` object
+	// https://tc39.github.io/ecma262/#sec-%iteratorprototype%-object
+	var IteratorPrototype, PrototypeOfArrayIteratorPrototype, arrayIterator;
 
-		var syms = Object.getOwnPropertySymbols(obj);
-		if (syms.length !== 1 || syms[0] !== sym) { return false; }
+	if ([].keys) {
+	  arrayIterator = [].keys();
+	  // Safari 8 has buggy iterators w/o `next`
+	  if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS = true;
+	  else {
+	    PrototypeOfArrayIteratorPrototype = objectGetPrototypeOf(objectGetPrototypeOf(arrayIterator));
+	    if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype = PrototypeOfArrayIteratorPrototype;
+	  }
+	}
 
-		if (!Object.prototype.propertyIsEnumerable.call(obj, sym)) { return false; }
+	if (IteratorPrototype == undefined) IteratorPrototype = {};
 
-		if (typeof Object.getOwnPropertyDescriptor === 'function') {
-			var descriptor = Object.getOwnPropertyDescriptor(obj, sym);
-			if (descriptor.value !== symVal || descriptor.enumerable !== true) { return false; }
-		}
+	// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
+	if ( !has(IteratorPrototype, ITERATOR)) {
+	  createNonEnumerableProperty(IteratorPrototype, ITERATOR, returnThis);
+	}
 
-		return true;
+	var iteratorsCore = {
+	  IteratorPrototype: IteratorPrototype,
+	  BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS
 	};
 
-	var origSymbol = commonjsGlobal.Symbol;
-
-
-	var hasSymbols$1 = function hasNativeSymbols() {
-		if (typeof origSymbol !== 'function') { return false; }
-		if (typeof Symbol !== 'function') { return false; }
-		if (typeof origSymbol('foo') !== 'symbol') { return false; }
-		if (typeof Symbol('bar') !== 'symbol') { return false; }
+	var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;
 
-		return shams();
-	};
 
-	/* eslint no-invalid-this: 1 */
-
-	var ERROR_MESSAGE = 'Function.prototype.bind called on incompatible ';
-	var slice$1 = Array.prototype.slice;
-	var toStr$3 = Object.prototype.toString;
-	var funcType = '[object Function]';
-
-	var implementation$2 = function bind(that) {
-	    var target = this;
-	    if (typeof target !== 'function' || toStr$3.call(target) !== funcType) {
-	        throw new TypeError(ERROR_MESSAGE + target);
-	    }
-	    var args = slice$1.call(arguments, 1);
-
-	    var bound;
-	    var binder = function () {
-	        if (this instanceof bound) {
-	            var result = target.apply(
-	                this,
-	                args.concat(slice$1.call(arguments))
-	            );
-	            if (Object(result) === result) {
-	                return result;
-	            }
-	            return this;
-	        } else {
-	            return target.apply(
-	                that,
-	                args.concat(slice$1.call(arguments))
-	            );
-	        }
-	    };
 
-	    var boundLength = Math.max(0, target.length - args.length);
-	    var boundArgs = [];
-	    for (var i = 0; i < boundLength; i++) {
-	        boundArgs.push('$' + i);
-	    }
 
-	    bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this,arguments); }')(binder);
 
-	    if (target.prototype) {
-	        var Empty = function Empty() {};
-	        Empty.prototype = target.prototype;
-	        bound.prototype = new Empty();
-	        Empty.prototype = null;
-	    }
+	var returnThis$1 = function () { return this; };
 
-	    return bound;
+	var createIteratorConstructor = function (IteratorConstructor, NAME, next) {
+	  var TO_STRING_TAG = NAME + ' Iterator';
+	  IteratorConstructor.prototype = objectCreate(IteratorPrototype$1, { next: createPropertyDescriptor(1, next) });
+	  setToStringTag(IteratorConstructor, TO_STRING_TAG, false);
+	  iterators[TO_STRING_TAG] = returnThis$1;
+	  return IteratorConstructor;
 	};
 
-	var functionBind = Function.prototype.bind || implementation$2;
-
-	/* globals
-		Atomics,
-		SharedArrayBuffer,
-	*/
-
-	var undefined$1;
-
-	var $TypeError = TypeError;
-
-	var $gOPD = Object.getOwnPropertyDescriptor;
-	if ($gOPD) {
-		try {
-			$gOPD({}, '');
-		} catch (e) {
-			$gOPD = null; // this is IE 8, which has a broken gOPD
-		}
-	}
-
-	var throwTypeError = function () { throw new $TypeError(); };
-	var ThrowTypeError = $gOPD
-		? (function () {
-			try {
-				// eslint-disable-next-line no-unused-expressions, no-caller, no-restricted-properties
-				arguments.callee; // IE 8 does not throw here
-				return throwTypeError;
-			} catch (calleeThrows) {
-				try {
-					// IE 8 throws on Object.getOwnPropertyDescriptor(arguments, '')
-					return $gOPD(arguments, 'callee').get;
-				} catch (gOPDthrows) {
-					return throwTypeError;
-				}
-			}
-		}())
-		: throwTypeError;
-
-	var hasSymbols$2 = hasSymbols$1();
-
-	var getProto = Object.getPrototypeOf || function (x) { return x.__proto__; }; // eslint-disable-line no-proto
-	var generatorFunction =  undefined$1;
-	var asyncFunction =  undefined$1;
-	var asyncGenFunction =  undefined$1;
-
-	var TypedArray = typeof Uint8Array === 'undefined' ? undefined$1 : getProto(Uint8Array);
-
-	var INTRINSICS = {
-		'%Array%': Array,
-		'%ArrayBuffer%': typeof ArrayBuffer === 'undefined' ? undefined$1 : ArrayBuffer,
-		'%ArrayBufferPrototype%': typeof ArrayBuffer === 'undefined' ? undefined$1 : ArrayBuffer.prototype,
-		'%ArrayIteratorPrototype%': hasSymbols$2 ? getProto([][Symbol.iterator]()) : undefined$1,
-		'%ArrayPrototype%': Array.prototype,
-		'%ArrayProto_entries%': Array.prototype.entries,
-		'%ArrayProto_forEach%': Array.prototype.forEach,
-		'%ArrayProto_keys%': Array.prototype.keys,
-		'%ArrayProto_values%': Array.prototype.values,
-		'%AsyncFromSyncIteratorPrototype%': undefined$1,
-		'%AsyncFunction%': asyncFunction,
-		'%AsyncFunctionPrototype%':  undefined$1,
-		'%AsyncGenerator%':  undefined$1,
-		'%AsyncGeneratorFunction%': asyncGenFunction,
-		'%AsyncGeneratorPrototype%':  undefined$1,
-		'%AsyncIteratorPrototype%':  undefined$1,
-		'%Atomics%': typeof Atomics === 'undefined' ? undefined$1 : Atomics,
-		'%Boolean%': Boolean,
-		'%BooleanPrototype%': Boolean.prototype,
-		'%DataView%': typeof DataView === 'undefined' ? undefined$1 : DataView,
-		'%DataViewPrototype%': typeof DataView === 'undefined' ? undefined$1 : DataView.prototype,
-		'%Date%': Date,
-		'%DatePrototype%': Date.prototype,
-		'%decodeURI%': decodeURI,
-		'%decodeURIComponent%': decodeURIComponent,
-		'%encodeURI%': encodeURI,
-		'%encodeURIComponent%': encodeURIComponent,
-		'%Error%': Error,
-		'%ErrorPrototype%': Error.prototype,
-		'%eval%': eval, // eslint-disable-line no-eval
-		'%EvalError%': EvalError,
-		'%EvalErrorPrototype%': EvalError.prototype,
-		'%Float32Array%': typeof Float32Array === 'undefined' ? undefined$1 : Float32Array,
-		'%Float32ArrayPrototype%': typeof Float32Array === 'undefined' ? undefined$1 : Float32Array.prototype,
-		'%Float64Array%': typeof Float64Array === 'undefined' ? undefined$1 : Float64Array,
-		'%Float64ArrayPrototype%': typeof Float64Array === 'undefined' ? undefined$1 : Float64Array.prototype,
-		'%Function%': Function,
-		'%FunctionPrototype%': Function.prototype,
-		'%Generator%':  undefined$1,
-		'%GeneratorFunction%': generatorFunction,
-		'%GeneratorPrototype%':  undefined$1,
-		'%Int8Array%': typeof Int8Array === 'undefined' ? undefined$1 : Int8Array,
-		'%Int8ArrayPrototype%': typeof Int8Array === 'undefined' ? undefined$1 : Int8Array.prototype,
-		'%Int16Array%': typeof Int16Array === 'undefined' ? undefined$1 : Int16Array,
-		'%Int16ArrayPrototype%': typeof Int16Array === 'undefined' ? undefined$1 : Int8Array.prototype,
-		'%Int32Array%': typeof Int32Array === 'undefined' ? undefined$1 : Int32Array,
-		'%Int32ArrayPrototype%': typeof Int32Array === 'undefined' ? undefined$1 : Int32Array.prototype,
-		'%isFinite%': isFinite,
-		'%isNaN%': isNaN,
-		'%IteratorPrototype%': hasSymbols$2 ? getProto(getProto([][Symbol.iterator]())) : undefined$1,
-		'%JSON%': typeof JSON === 'object' ? JSON : undefined$1,
-		'%JSONParse%': typeof JSON === 'object' ? JSON.parse : undefined$1,
-		'%Map%': typeof Map === 'undefined' ? undefined$1 : Map,
-		'%MapIteratorPrototype%': typeof Map === 'undefined' || !hasSymbols$2 ? undefined$1 : getProto(new Map()[Symbol.iterator]()),
-		'%MapPrototype%': typeof Map === 'undefined' ? undefined$1 : Map.prototype,
-		'%Math%': Math,
-		'%Number%': Number,
-		'%NumberPrototype%': Number.prototype,
-		'%Object%': Object,
-		'%ObjectPrototype%': Object.prototype,
-		'%ObjProto_toString%': Object.prototype.toString,
-		'%ObjProto_valueOf%': Object.prototype.valueOf,
-		'%parseFloat%': parseFloat,
-		'%parseInt%': parseInt,
-		'%Promise%': typeof Promise === 'undefined' ? undefined$1 : Promise,
-		'%PromisePrototype%': typeof Promise === 'undefined' ? undefined$1 : Promise.prototype,
-		'%PromiseProto_then%': typeof Promise === 'undefined' ? undefined$1 : Promise.prototype.then,
-		'%Promise_all%': typeof Promise === 'undefined' ? undefined$1 : Promise.all,
-		'%Promise_reject%': typeof Promise === 'undefined' ? undefined$1 : Promise.reject,
-		'%Promise_resolve%': typeof Promise === 'undefined' ? undefined$1 : Promise.resolve,
-		'%Proxy%': typeof Proxy === 'undefined' ? undefined$1 : Proxy,
-		'%RangeError%': RangeError,
-		'%RangeErrorPrototype%': RangeError.prototype,
-		'%ReferenceError%': ReferenceError,
-		'%ReferenceErrorPrototype%': ReferenceError.prototype,
-		'%Reflect%': typeof Reflect === 'undefined' ? undefined$1 : Reflect,
-		'%RegExp%': RegExp,
-		'%RegExpPrototype%': RegExp.prototype,
-		'%Set%': typeof Set === 'undefined' ? undefined$1 : Set,
-		'%SetIteratorPrototype%': typeof Set === 'undefined' || !hasSymbols$2 ? undefined$1 : getProto(new Set()[Symbol.iterator]()),
-		'%SetPrototype%': typeof Set === 'undefined' ? undefined$1 : Set.prototype,
-		'%SharedArrayBuffer%': typeof SharedArrayBuffer === 'undefined' ? undefined$1 : SharedArrayBuffer,
-		'%SharedArrayBufferPrototype%': typeof SharedArrayBuffer === 'undefined' ? undefined$1 : SharedArrayBuffer.prototype,
-		'%String%': String,
-		'%StringIteratorPrototype%': hasSymbols$2 ? getProto(''[Symbol.iterator]()) : undefined$1,
-		'%StringPrototype%': String.prototype,
-		'%Symbol%': hasSymbols$2 ? Symbol : undefined$1,
-		'%SymbolPrototype%': hasSymbols$2 ? Symbol.prototype : undefined$1,
-		'%SyntaxError%': SyntaxError,
-		'%SyntaxErrorPrototype%': SyntaxError.prototype,
-		'%ThrowTypeError%': ThrowTypeError,
-		'%TypedArray%': TypedArray,
-		'%TypedArrayPrototype%': TypedArray ? TypedArray.prototype : undefined$1,
-		'%TypeError%': $TypeError,
-		'%TypeErrorPrototype%': $TypeError.prototype,
-		'%Uint8Array%': typeof Uint8Array === 'undefined' ? undefined$1 : Uint8Array,
-		'%Uint8ArrayPrototype%': typeof Uint8Array === 'undefined' ? undefined$1 : Uint8Array.prototype,
-		'%Uint8ClampedArray%': typeof Uint8ClampedArray === 'undefined' ? undefined$1 : Uint8ClampedArray,
-		'%Uint8ClampedArrayPrototype%': typeof Uint8ClampedArray === 'undefined' ? undefined$1 : Uint8ClampedArray.prototype,
-		'%Uint16Array%': typeof Uint16Array === 'undefined' ? undefined$1 : Uint16Array,
-		'%Uint16ArrayPrototype%': typeof Uint16Array === 'undefined' ? undefined$1 : Uint16Array.prototype,
-		'%Uint32Array%': typeof Uint32Array === 'undefined' ? undefined$1 : Uint32Array,
-		'%Uint32ArrayPrototype%': typeof Uint32Array === 'undefined' ? undefined$1 : Uint32Array.prototype,
-		'%URIError%': URIError,
-		'%URIErrorPrototype%': URIError.prototype,
-		'%WeakMap%': typeof WeakMap === 'undefined' ? undefined$1 : WeakMap,
-		'%WeakMapPrototype%': typeof WeakMap === 'undefined' ? undefined$1 : WeakMap.prototype,
-		'%WeakSet%': typeof WeakSet === 'undefined' ? undefined$1 : WeakSet,
-		'%WeakSetPrototype%': typeof WeakSet === 'undefined' ? undefined$1 : WeakSet.prototype
+	var aPossiblePrototype = function (it) {
+	  if (!isObject(it) && it !== null) {
+	    throw TypeError("Can't set " + String(it) + ' as a prototype');
+	  } return it;
 	};
 
+	// `Object.setPrototypeOf` method
+	// https://tc39.github.io/ecma262/#sec-object.setprototypeof
+	// Works with __proto__ only. Old v8 can't work with null proto objects.
+	/* eslint-disable no-proto */
+	var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
+	  var CORRECT_SETTER = false;
+	  var test = {};
+	  var setter;
+	  try {
+	    setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;
+	    setter.call(test, []);
+	    CORRECT_SETTER = test instanceof Array;
+	  } catch (error) { /* empty */ }
+	  return function setPrototypeOf(O, proto) {
+	    anObject(O);
+	    aPossiblePrototype(proto);
+	    if (CORRECT_SETTER) setter.call(O, proto);
+	    else O.__proto__ = proto;
+	    return O;
+	  };
+	}() : undefined);
+
+	var IteratorPrototype$2 = iteratorsCore.IteratorPrototype;
+	var BUGGY_SAFARI_ITERATORS$1 = iteratorsCore.BUGGY_SAFARI_ITERATORS;
+	var ITERATOR$1 = wellKnownSymbol('iterator');
+	var KEYS = 'keys';
+	var VALUES = 'values';
+	var ENTRIES = 'entries';
+
+	var returnThis$2 = function () { return this; };
+
+	var defineIterator = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {
+	  createIteratorConstructor(IteratorConstructor, NAME, next);
+
+	  var getIterationMethod = function (KIND) {
+	    if (KIND === DEFAULT && defaultIterator) return defaultIterator;
+	    if (!BUGGY_SAFARI_ITERATORS$1 && KIND in IterablePrototype) return IterablePrototype[KIND];
+	    switch (KIND) {
+	      case KEYS: return function keys() { return new IteratorConstructor(this, KIND); };
+	      case VALUES: return function values() { return new IteratorConstructor(this, KIND); };
+	      case ENTRIES: return function entries() { return new IteratorConstructor(this, KIND); };
+	    } return function () { return new IteratorConstructor(this); };
+	  };
+
+	  var TO_STRING_TAG = NAME + ' Iterator';
+	  var INCORRECT_VALUES_NAME = false;
+	  var IterablePrototype = Iterable.prototype;
+	  var nativeIterator = IterablePrototype[ITERATOR$1]
+	    || IterablePrototype['@@iterator']
+	    || DEFAULT && IterablePrototype[DEFAULT];
+	  var defaultIterator = !BUGGY_SAFARI_ITERATORS$1 && nativeIterator || getIterationMethod(DEFAULT);
+	  var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;
+	  var CurrentIteratorPrototype, methods, KEY;
+
+	  // fix native
+	  if (anyNativeIterator) {
+	    CurrentIteratorPrototype = objectGetPrototypeOf(anyNativeIterator.call(new Iterable()));
+	    if (IteratorPrototype$2 !== Object.prototype && CurrentIteratorPrototype.next) {
+	      if ( objectGetPrototypeOf(CurrentIteratorPrototype) !== IteratorPrototype$2) {
+	        if (objectSetPrototypeOf) {
+	          objectSetPrototypeOf(CurrentIteratorPrototype, IteratorPrototype$2);
+	        } else if (typeof CurrentIteratorPrototype[ITERATOR$1] != 'function') {
+	          createNonEnumerableProperty(CurrentIteratorPrototype, ITERATOR$1, returnThis$2);
+	        }
+	      }
+	      // Set @@toStringTag to native iterators
+	      setToStringTag(CurrentIteratorPrototype, TO_STRING_TAG, true);
+	    }
+	  }
 
-	var $replace = functionBind.call(Function.call, String.prototype.replace);
+	  // fix Array#{values, @@iterator}.name in V8 / FF
+	  if (DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {
+	    INCORRECT_VALUES_NAME = true;
+	    defaultIterator = function values() { return nativeIterator.call(this); };
+	  }
 
-	/* adapted from https://github.com/lodash/lodash/blob/4.17.15/dist/lodash.js#L6735-L6744 */
-	var rePropName = /[^%.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|%$))/g;
-	var reEscapeChar = /\\(\\)?/g; /** Used to match backslashes in property paths. */
-	var stringToPath = function stringToPath(string) {
-		var result = [];
-		$replace(string, rePropName, function (match, number, quote, subString) {
-			result[result.length] = quote ? $replace(subString, reEscapeChar, '$1') : (number || match);
-		});
-		return result;
-	};
-	/* end adaptation */
+	  // define iterator
+	  if ( IterablePrototype[ITERATOR$1] !== defaultIterator) {
+	    createNonEnumerableProperty(IterablePrototype, ITERATOR$1, defaultIterator);
+	  }
+	  iterators[NAME] = defaultIterator;
 
-	var getBaseIntrinsic = function getBaseIntrinsic(name, allowMissing) {
-		if (!(name in INTRINSICS)) {
-			throw new SyntaxError('intrinsic ' + name + ' does not exist!');
-		}
+	  // export additional methods
+	  if (DEFAULT) {
+	    methods = {
+	      values: getIterationMethod(VALUES),
+	      keys: IS_SET ? defaultIterator : getIterationMethod(KEYS),
+	      entries: getIterationMethod(ENTRIES)
+	    };
+	    if (FORCED) for (KEY in methods) {
+	      if (BUGGY_SAFARI_ITERATORS$1 || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {
+	        redefine(IterablePrototype, KEY, methods[KEY]);
+	      }
+	    } else _export({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS$1 || INCORRECT_VALUES_NAME }, methods);
+	  }
+
+	  return methods;
+	};
+
+	var ARRAY_ITERATOR = 'Array Iterator';
+	var setInternalState$1 = internalState.set;
+	var getInternalState$1 = internalState.getterFor(ARRAY_ITERATOR);
+
+	// `Array.prototype.entries` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.entries
+	// `Array.prototype.keys` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.keys
+	// `Array.prototype.values` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.values
+	// `Array.prototype[@@iterator]` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype-@@iterator
+	// `CreateArrayIterator` internal method
+	// https://tc39.github.io/ecma262/#sec-createarrayiterator
+	var es_array_iterator = defineIterator(Array, 'Array', function (iterated, kind) {
+	  setInternalState$1(this, {
+	    type: ARRAY_ITERATOR,
+	    target: toIndexedObject(iterated), // target
+	    index: 0,                          // next index
+	    kind: kind                         // kind
+	  });
+	// `%ArrayIteratorPrototype%.next` method
+	// https://tc39.github.io/ecma262/#sec-%arrayiteratorprototype%.next
+	}, function () {
+	  var state = getInternalState$1(this);
+	  var target = state.target;
+	  var kind = state.kind;
+	  var index = state.index++;
+	  if (!target || index >= target.length) {
+	    state.target = undefined;
+	    return { value: undefined, done: true };
+	  }
+	  if (kind == 'keys') return { value: index, done: false };
+	  if (kind == 'values') return { value: target[index], done: false };
+	  return { value: [index, target[index]], done: false };
+	}, 'values');
+
+	// argumentsList[@@iterator] is %ArrayProto_values%
+	// https://tc39.github.io/ecma262/#sec-createunmappedargumentsobject
+	// https://tc39.github.io/ecma262/#sec-createmappedargumentsobject
+	iterators.Arguments = iterators.Array;
+
+	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables('keys');
+	addToUnscopables('values');
+	addToUnscopables('entries');
+
+	var nativeJoin = [].join;
+
+	var ES3_STRINGS = indexedObject != Object;
+	var STRICT_METHOD$2 = arrayMethodIsStrict('join', ',');
+
+	// `Array.prototype.join` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.join
+	_export({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD$2 }, {
+	  join: function join(separator) {
+	    return nativeJoin.call(toIndexedObject(this), separator === undefined ? ',' : separator);
+	  }
+	});
 
-		// istanbul ignore if // hopefully this is impossible to test :-)
-		if (typeof INTRINSICS[name] === 'undefined' && !allowMissing) {
-			throw new $TypeError('intrinsic ' + name + ' exists, but is not available. Please file an issue!');
-		}
+	var engineUserAgent = getBuiltIn('navigator', 'userAgent') || '';
 
-		return INTRINSICS[name];
-	};
+	var process$1 = global_1.process;
+	var versions = process$1 && process$1.versions;
+	var v8 = versions && versions.v8;
+	var match, version;
 
-	var GetIntrinsic = function GetIntrinsic(name, allowMissing) {
-		if (typeof name !== 'string' || name.length === 0) {
-			throw new TypeError('intrinsic name must be a non-empty string');
-		}
-		if (arguments.length > 1 && typeof allowMissing !== 'boolean') {
-			throw new TypeError('"allowMissing" argument must be a boolean');
-		}
-
-		var parts = stringToPath(name);
-
-		var value = getBaseIntrinsic('%' + (parts.length > 0 ? parts[0] : '') + '%', allowMissing);
-		for (var i = 1; i < parts.length; i += 1) {
-			if (value != null) {
-				if ($gOPD && (i + 1) >= parts.length) {
-					var desc = $gOPD(value, parts[i]);
-					if (!allowMissing && !(parts[i] in value)) {
-						throw new $TypeError('base intrinsic for ' + name + ' exists, but the property is not available.');
-					}
-					value = desc ? (desc.get || desc.value) : value[parts[i]];
-				} else {
-					value = value[parts[i]];
-				}
-			}
-		}
-		return value;
-	};
+	if (v8) {
+	  match = v8.split('.');
+	  version = match[0] + match[1];
+	} else if (engineUserAgent) {
+	  match = engineUserAgent.match(/Edge\/(\d+)/);
+	  if (!match || match[1] >= 74) {
+	    match = engineUserAgent.match(/Chrome\/(\d+)/);
+	    if (match) version = match[1];
+	  }
+	}
 
-	var $TypeError$1 = GetIntrinsic('%TypeError%');
+	var engineV8Version = version && +version;
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.10
+	var SPECIES$1 = wellKnownSymbol('species');
 
-	var CheckObjectCoercible = function CheckObjectCoercible(value, optMessage) {
-		if (value == null) {
-			throw new $TypeError$1(optMessage || ('Cannot call method on ' + value));
-		}
-		return value;
+	var arrayMethodHasSpeciesSupport = function (METHOD_NAME) {
+	  // We can't use this feature detection in V8 since it causes
+	  // deoptimization and serious performance degradation
+	  // https://github.com/zloirock/core-js/issues/677
+	  return engineV8Version >= 51 || !fails(function () {
+	    var array = [];
+	    var constructor = array.constructor = {};
+	    constructor[SPECIES$1] = function () {
+	      return { foo: 1 };
+	    };
+	    return array[METHOD_NAME](Boolean).foo !== 1;
+	  });
 	};
 
-	var RequireObjectCoercible = CheckObjectCoercible;
-
-	var $Object = GetIntrinsic('%Object%');
+	var $map = arrayIteration.map;
 
 
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-toobject
+	var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('map');
+	// FF49- issue
+	var USES_TO_LENGTH$2 = arrayMethodUsesToLength('map');
 
-	var ToObject = function ToObject(value) {
-		RequireObjectCoercible(value);
-		return $Object(value);
-	};
+	// `Array.prototype.map` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.map
+	// with adding support of @@species
+	_export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT || !USES_TO_LENGTH$2 }, {
+	  map: function map(callbackfn /* , thisArg */) {
+	    return $map(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	var $Math = GetIntrinsic('%Math%');
-	var $Number = GetIntrinsic('%Number%');
+	var createProperty = function (object, key, value) {
+	  var propertyKey = toPrimitive(key);
+	  if (propertyKey in object) objectDefineProperty.f(object, propertyKey, createPropertyDescriptor(0, value));
+	  else object[propertyKey] = value;
+	};
+
+	var HAS_SPECIES_SUPPORT$1 = arrayMethodHasSpeciesSupport('slice');
+	var USES_TO_LENGTH$3 = arrayMethodUsesToLength('slice', { ACCESSORS: true, 0: 0, 1: 2 });
+
+	var SPECIES$2 = wellKnownSymbol('species');
+	var nativeSlice = [].slice;
+	var max$1 = Math.max;
+
+	// `Array.prototype.slice` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.slice
+	// fallback for not array-like ES3 strings and DOM objects
+	_export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$1 || !USES_TO_LENGTH$3 }, {
+	  slice: function slice(start, end) {
+	    var O = toIndexedObject(this);
+	    var length = toLength(O.length);
+	    var k = toAbsoluteIndex(start, length);
+	    var fin = toAbsoluteIndex(end === undefined ? length : end, length);
+	    // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible
+	    var Constructor, result, n;
+	    if (isArray(O)) {
+	      Constructor = O.constructor;
+	      // cross-realm fallback
+	      if (typeof Constructor == 'function' && (Constructor === Array || isArray(Constructor.prototype))) {
+	        Constructor = undefined;
+	      } else if (isObject(Constructor)) {
+	        Constructor = Constructor[SPECIES$2];
+	        if (Constructor === null) Constructor = undefined;
+	      }
+	      if (Constructor === Array || Constructor === undefined) {
+	        return nativeSlice.call(O, k, fin);
+	      }
+	    }
+	    result = new (Constructor === undefined ? Array : Constructor)(max$1(fin - k, 0));
+	    for (n = 0; k < fin; k++, n++) if (k in O) createProperty(result, n, O[k]);
+	    result.length = n;
+	    return result;
+	  }
+	});
 
-	var maxSafeInteger = $Number.MAX_SAFE_INTEGER || $Math.pow(2, 53) - 1;
+	var arrayBufferNative = typeof ArrayBuffer !== 'undefined' && typeof DataView !== 'undefined';
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.3
+	var redefineAll = function (target, src, options) {
+	  for (var key in src) redefine(target, key, src[key], options);
+	  return target;
+	};
 
-	var ToNumber = function ToNumber(value) {
-		return +value; // eslint-disable-line no-implicit-coercion
+	var anInstance = function (it, Constructor, name) {
+	  if (!(it instanceof Constructor)) {
+	    throw TypeError('Incorrect ' + (name ? name + ' ' : '') + 'invocation');
+	  } return it;
 	};
 
-	var _isNaN = Number.isNaN || function isNaN(a) {
-		return a !== a;
+	// `ToIndex` abstract operation
+	// https://tc39.github.io/ecma262/#sec-toindex
+	var toIndex = function (it) {
+	  if (it === undefined) return 0;
+	  var number = toInteger(it);
+	  var length = toLength(number);
+	  if (number !== length) throw RangeError('Wrong length or index');
+	  return length;
 	};
 
-	var $isNaN = Number.isNaN || function (a) { return a !== a; };
+	// IEEE754 conversions based on https://github.com/feross/ieee754
+	// eslint-disable-next-line no-shadow-restricted-names
+	var Infinity$1 = 1 / 0;
+	var abs = Math.abs;
+	var pow = Math.pow;
+	var floor$1 = Math.floor;
+	var log = Math.log;
+	var LN2 = Math.LN2;
 
-	var _isFinite = Number.isFinite || function (x) { return typeof x === 'number' && !$isNaN(x) && x !== Infinity && x !== -Infinity; };
+	var pack = function (number, mantissaLength, bytes) {
+	  var buffer = new Array(bytes);
+	  var exponentLength = bytes * 8 - mantissaLength - 1;
+	  var eMax = (1 << exponentLength) - 1;
+	  var eBias = eMax >> 1;
+	  var rt = mantissaLength === 23 ? pow(2, -24) - pow(2, -77) : 0;
+	  var sign = number < 0 || number === 0 && 1 / number < 0 ? 1 : 0;
+	  var index = 0;
+	  var exponent, mantissa, c;
+	  number = abs(number);
+	  // eslint-disable-next-line no-self-compare
+	  if (number != number || number === Infinity$1) {
+	    // eslint-disable-next-line no-self-compare
+	    mantissa = number != number ? 1 : 0;
+	    exponent = eMax;
+	  } else {
+	    exponent = floor$1(log(number) / LN2);
+	    if (number * (c = pow(2, -exponent)) < 1) {
+	      exponent--;
+	      c *= 2;
+	    }
+	    if (exponent + eBias >= 1) {
+	      number += rt / c;
+	    } else {
+	      number += rt * pow(2, 1 - eBias);
+	    }
+	    if (number * c >= 2) {
+	      exponent++;
+	      c /= 2;
+	    }
+	    if (exponent + eBias >= eMax) {
+	      mantissa = 0;
+	      exponent = eMax;
+	    } else if (exponent + eBias >= 1) {
+	      mantissa = (number * c - 1) * pow(2, mantissaLength);
+	      exponent = exponent + eBias;
+	    } else {
+	      mantissa = number * pow(2, eBias - 1) * pow(2, mantissaLength);
+	      exponent = 0;
+	    }
+	  }
+	  for (; mantissaLength >= 8; buffer[index++] = mantissa & 255, mantissa /= 256, mantissaLength -= 8);
+	  exponent = exponent << mantissaLength | mantissa;
+	  exponentLength += mantissaLength;
+	  for (; exponentLength > 0; buffer[index++] = exponent & 255, exponent /= 256, exponentLength -= 8);
+	  buffer[--index] |= sign * 128;
+	  return buffer;
+	};
 
-	var sign$1 = function sign(number) {
-		return number >= 0 ? 1 : -1;
+	var unpack = function (buffer, mantissaLength) {
+	  var bytes = buffer.length;
+	  var exponentLength = bytes * 8 - mantissaLength - 1;
+	  var eMax = (1 << exponentLength) - 1;
+	  var eBias = eMax >> 1;
+	  var nBits = exponentLength - 7;
+	  var index = bytes - 1;
+	  var sign = buffer[index--];
+	  var exponent = sign & 127;
+	  var mantissa;
+	  sign >>= 7;
+	  for (; nBits > 0; exponent = exponent * 256 + buffer[index], index--, nBits -= 8);
+	  mantissa = exponent & (1 << -nBits) - 1;
+	  exponent >>= -nBits;
+	  nBits += mantissaLength;
+	  for (; nBits > 0; mantissa = mantissa * 256 + buffer[index], index--, nBits -= 8);
+	  if (exponent === 0) {
+	    exponent = 1 - eBias;
+	  } else if (exponent === eMax) {
+	    return mantissa ? NaN : sign ? -Infinity$1 : Infinity$1;
+	  } else {
+	    mantissa = mantissa + pow(2, mantissaLength);
+	    exponent = exponent - eBias;
+	  } return (sign ? -1 : 1) * mantissa * pow(2, exponent - mantissaLength);
 	};
 
-	var $Math$1 = GetIntrinsic('%Math%');
+	var ieee754 = {
+	  pack: pack,
+	  unpack: unpack
+	};
 
+	// `Array.prototype.fill` method implementation
+	// https://tc39.github.io/ecma262/#sec-array.prototype.fill
+	var arrayFill = function fill(value /* , start = 0, end = @length */) {
+	  var O = toObject(this);
+	  var length = toLength(O.length);
+	  var argumentsLength = arguments.length;
+	  var index = toAbsoluteIndex(argumentsLength > 1 ? arguments[1] : undefined, length);
+	  var end = argumentsLength > 2 ? arguments[2] : undefined;
+	  var endPos = end === undefined ? length : toAbsoluteIndex(end, length);
+	  while (endPos > index) O[index++] = value;
+	  return O;
+	};
 
+	var getOwnPropertyNames = objectGetOwnPropertyNames.f;
+	var defineProperty$4 = objectDefineProperty.f;
 
 
 
 
-	var $floor = $Math$1.floor;
-	var $abs = $Math$1.abs;
+	var getInternalState$2 = internalState.get;
+	var setInternalState$2 = internalState.set;
+	var ARRAY_BUFFER = 'ArrayBuffer';
+	var DATA_VIEW = 'DataView';
+	var PROTOTYPE$2 = 'prototype';
+	var WRONG_LENGTH = 'Wrong length';
+	var WRONG_INDEX = 'Wrong index';
+	var NativeArrayBuffer = global_1[ARRAY_BUFFER];
+	var $ArrayBuffer = NativeArrayBuffer;
+	var $DataView = global_1[DATA_VIEW];
+	var $DataViewPrototype = $DataView && $DataView[PROTOTYPE$2];
+	var ObjectPrototype$2 = Object.prototype;
+	var RangeError$1 = global_1.RangeError;
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.4
+	var packIEEE754 = ieee754.pack;
+	var unpackIEEE754 = ieee754.unpack;
 
-	var ToInteger = function ToInteger(value) {
-		var number = ToNumber(value);
-		if (_isNaN(number)) { return 0; }
-		if (number === 0 || !_isFinite(number)) { return number; }
-		return sign$1(number) * $floor($abs(number));
+	var packInt8 = function (number) {
+	  return [number & 0xFF];
 	};
 
-	var $apply = GetIntrinsic('%Function.prototype.apply%');
-	var $call = GetIntrinsic('%Function.prototype.call%');
-	var $reflectApply = GetIntrinsic('%Reflect.apply%', true) || functionBind.call($call, $apply);
-
-	var callBind = function callBind() {
-		return $reflectApply(functionBind, $call, arguments);
+	var packInt16 = function (number) {
+	  return [number & 0xFF, number >> 8 & 0xFF];
 	};
 
-	var apply = function applyBind() {
-		return $reflectApply(functionBind, $apply, arguments);
+	var packInt32 = function (number) {
+	  return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];
 	};
-	callBind.apply = apply;
 
-	var $indexOf = callBind(GetIntrinsic('String.prototype.indexOf'));
-
-	var callBound = function callBoundIntrinsic(name, allowMissing) {
-		var intrinsic = GetIntrinsic(name, !!allowMissing);
-		if (typeof intrinsic === 'function' && $indexOf(name, '.prototype.')) {
-			return callBind(intrinsic);
-		}
-		return intrinsic;
+	var unpackInt32 = function (buffer) {
+	  return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
 	};
 
-	var $test = GetIntrinsic('RegExp.prototype.test');
-
+	var packFloat32 = function (number) {
+	  return packIEEE754(number, 23, 4);
+	};
 
+	var packFloat64 = function (number) {
+	  return packIEEE754(number, 52, 8);
+	};
 
-	var regexTester = function regexTester(regex) {
-		return callBind($test, regex);
+	var addGetter = function (Constructor, key) {
+	  defineProperty$4(Constructor[PROTOTYPE$2], key, { get: function () { return getInternalState$2(this)[key]; } });
 	};
 
-	var isPrimitive = function isPrimitive(value) {
-		return value === null || (typeof value !== 'function' && typeof value !== 'object');
+	var get$1 = function (view, count, index, isLittleEndian) {
+	  var intIndex = toIndex(index);
+	  var store = getInternalState$2(view);
+	  if (intIndex + count > store.byteLength) throw RangeError$1(WRONG_INDEX);
+	  var bytes = getInternalState$2(store.buffer).bytes;
+	  var start = intIndex + store.byteOffset;
+	  var pack = bytes.slice(start, start + count);
+	  return isLittleEndian ? pack : pack.reverse();
 	};
 
-	var isPrimitive$1 = function isPrimitive(value) {
-		return value === null || (typeof value !== 'function' && typeof value !== 'object');
+	var set$1 = function (view, count, index, conversion, value, isLittleEndian) {
+	  var intIndex = toIndex(index);
+	  var store = getInternalState$2(view);
+	  if (intIndex + count > store.byteLength) throw RangeError$1(WRONG_INDEX);
+	  var bytes = getInternalState$2(store.buffer).bytes;
+	  var start = intIndex + store.byteOffset;
+	  var pack = conversion(+value);
+	  for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1];
 	};
 
-	var fnToStr = Function.prototype.toString;
-	var reflectApply = typeof Reflect === 'object' && Reflect !== null && Reflect.apply;
-	var badArrayLike;
-	var isCallableMarker;
-	if (typeof reflectApply === 'function' && typeof Object.defineProperty === 'function') {
-		try {
-			badArrayLike = Object.defineProperty({}, 'length', {
-				get: function () {
-					throw isCallableMarker;
-				}
-			});
-			isCallableMarker = {};
-		} catch (_) {
-			reflectApply = null;
-		}
+	if (!arrayBufferNative) {
+	  $ArrayBuffer = function ArrayBuffer(length) {
+	    anInstance(this, $ArrayBuffer, ARRAY_BUFFER);
+	    var byteLength = toIndex(length);
+	    setInternalState$2(this, {
+	      bytes: arrayFill.call(new Array(byteLength), 0),
+	      byteLength: byteLength
+	    });
+	    if (!descriptors) this.byteLength = byteLength;
+	  };
+
+	  $DataView = function DataView(buffer, byteOffset, byteLength) {
+	    anInstance(this, $DataView, DATA_VIEW);
+	    anInstance(buffer, $ArrayBuffer, DATA_VIEW);
+	    var bufferLength = getInternalState$2(buffer).byteLength;
+	    var offset = toInteger(byteOffset);
+	    if (offset < 0 || offset > bufferLength) throw RangeError$1('Wrong offset');
+	    byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength);
+	    if (offset + byteLength > bufferLength) throw RangeError$1(WRONG_LENGTH);
+	    setInternalState$2(this, {
+	      buffer: buffer,
+	      byteLength: byteLength,
+	      byteOffset: offset
+	    });
+	    if (!descriptors) {
+	      this.buffer = buffer;
+	      this.byteLength = byteLength;
+	      this.byteOffset = offset;
+	    }
+	  };
+
+	  if (descriptors) {
+	    addGetter($ArrayBuffer, 'byteLength');
+	    addGetter($DataView, 'buffer');
+	    addGetter($DataView, 'byteLength');
+	    addGetter($DataView, 'byteOffset');
+	  }
+
+	  redefineAll($DataView[PROTOTYPE$2], {
+	    getInt8: function getInt8(byteOffset) {
+	      return get$1(this, 1, byteOffset)[0] << 24 >> 24;
+	    },
+	    getUint8: function getUint8(byteOffset) {
+	      return get$1(this, 1, byteOffset)[0];
+	    },
+	    getInt16: function getInt16(byteOffset /* , littleEndian */) {
+	      var bytes = get$1(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
+	      return (bytes[1] << 8 | bytes[0]) << 16 >> 16;
+	    },
+	    getUint16: function getUint16(byteOffset /* , littleEndian */) {
+	      var bytes = get$1(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
+	      return bytes[1] << 8 | bytes[0];
+	    },
+	    getInt32: function getInt32(byteOffset /* , littleEndian */) {
+	      return unpackInt32(get$1(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));
+	    },
+	    getUint32: function getUint32(byteOffset /* , littleEndian */) {
+	      return unpackInt32(get$1(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;
+	    },
+	    getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
+	      return unpackIEEE754(get$1(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);
+	    },
+	    getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
+	      return unpackIEEE754(get$1(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);
+	    },
+	    setInt8: function setInt8(byteOffset, value) {
+	      set$1(this, 1, byteOffset, packInt8, value);
+	    },
+	    setUint8: function setUint8(byteOffset, value) {
+	      set$1(this, 1, byteOffset, packInt8, value);
+	    },
+	    setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
+	      set$1(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
+	      set$1(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
+	      set$1(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
+	      set$1(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
+	      set$1(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);
+	    },
+	    setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
+	      set$1(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);
+	    }
+	  });
 	} else {
-		reflectApply = null;
-	}
+	  if (!fails(function () {
+	    NativeArrayBuffer(1);
+	  }) || !fails(function () {
+	    new NativeArrayBuffer(-1); // eslint-disable-line no-new
+	  }) || fails(function () {
+	    new NativeArrayBuffer(); // eslint-disable-line no-new
+	    new NativeArrayBuffer(1.5); // eslint-disable-line no-new
+	    new NativeArrayBuffer(NaN); // eslint-disable-line no-new
+	    return NativeArrayBuffer.name != ARRAY_BUFFER;
+	  })) {
+	    $ArrayBuffer = function ArrayBuffer(length) {
+	      anInstance(this, $ArrayBuffer);
+	      return new NativeArrayBuffer(toIndex(length));
+	    };
+	    var ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE$2] = NativeArrayBuffer[PROTOTYPE$2];
+	    for (var keys$1 = getOwnPropertyNames(NativeArrayBuffer), j = 0, key; keys$1.length > j;) {
+	      if (!((key = keys$1[j++]) in $ArrayBuffer)) {
+	        createNonEnumerableProperty($ArrayBuffer, key, NativeArrayBuffer[key]);
+	      }
+	    }
+	    ArrayBufferPrototype.constructor = $ArrayBuffer;
+	  }
 
-	var constructorRegex = /^\s*class\b/;
-	var isES6ClassFn = function isES6ClassFunction(value) {
-		try {
-			var fnStr = fnToStr.call(value);
-			return constructorRegex.test(fnStr);
-		} catch (e) {
-			return false; // not a function
-		}
-	};
+	  // WebKit bug - the same parent prototype for typed arrays and data view
+	  if (objectSetPrototypeOf && objectGetPrototypeOf($DataViewPrototype) !== ObjectPrototype$2) {
+	    objectSetPrototypeOf($DataViewPrototype, ObjectPrototype$2);
+	  }
 
-	var tryFunctionObject = function tryFunctionToStr(value) {
-		try {
-			if (isES6ClassFn(value)) { return false; }
-			fnToStr.call(value);
-			return true;
-		} catch (e) {
-			return false;
-		}
-	};
-	var toStr$4 = Object.prototype.toString;
-	var fnClass = '[object Function]';
-	var genClass = '[object GeneratorFunction]';
-	var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-
-	var isCallable = reflectApply
-		? function isCallable(value) {
-			if (!value) { return false; }
-			if (typeof value !== 'function' && typeof value !== 'object') { return false; }
-			if (typeof value === 'function' && !value.prototype) { return true; }
-			try {
-				reflectApply(value, null, badArrayLike);
-			} catch (e) {
-				if (e !== isCallableMarker) { return false; }
-			}
-			return !isES6ClassFn(value);
-		}
-		: function isCallable(value) {
-			if (!value) { return false; }
-			if (typeof value !== 'function' && typeof value !== 'object') { return false; }
-			if (typeof value === 'function' && !value.prototype) { return true; }
-			if (hasToStringTag) { return tryFunctionObject(value); }
-			if (isES6ClassFn(value)) { return false; }
-			var strClass = toStr$4.call(value);
-			return strClass === fnClass || strClass === genClass;
-		};
-
-	var getDay = Date.prototype.getDay;
-	var tryDateObject = function tryDateGetDayCall(value) {
-		try {
-			getDay.call(value);
-			return true;
-		} catch (e) {
-			return false;
-		}
-	};
+	  // iOS Safari 7.x bug
+	  var testView = new $DataView(new $ArrayBuffer(2));
+	  var nativeSetInt8 = $DataViewPrototype.setInt8;
+	  testView.setInt8(0, 2147483648);
+	  testView.setInt8(1, 2147483649);
+	  if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll($DataViewPrototype, {
+	    setInt8: function setInt8(byteOffset, value) {
+	      nativeSetInt8.call(this, byteOffset, value << 24 >> 24);
+	    },
+	    setUint8: function setUint8(byteOffset, value) {
+	      nativeSetInt8.call(this, byteOffset, value << 24 >> 24);
+	    }
+	  }, { unsafe: true });
+	}
 
-	var toStr$5 = Object.prototype.toString;
-	var dateClass = '[object Date]';
-	var hasToStringTag$1 = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
+	setToStringTag($ArrayBuffer, ARRAY_BUFFER);
+	setToStringTag($DataView, DATA_VIEW);
 
-	var isDateObject = function isDateObject(value) {
-		if (typeof value !== 'object' || value === null) {
-			return false;
-		}
-		return hasToStringTag$1 ? tryDateObject(value) : toStr$5.call(value) === dateClass;
+	var arrayBuffer = {
+	  ArrayBuffer: $ArrayBuffer,
+	  DataView: $DataView
 	};
 
-	var isSymbol$2 = createCommonjsModule(function (module) {
+	var SPECIES$3 = wellKnownSymbol('species');
 
-	var toStr = Object.prototype.toString;
-	var hasSymbols = hasSymbols$1();
+	var setSpecies = function (CONSTRUCTOR_NAME) {
+	  var Constructor = getBuiltIn(CONSTRUCTOR_NAME);
+	  var defineProperty = objectDefineProperty.f;
 
-	if (hasSymbols) {
-		var symToStr = Symbol.prototype.toString;
-		var symStringRegex = /^Symbol\(.*\)$/;
-		var isSymbolObject = function isRealSymbolObject(value) {
-			if (typeof value.valueOf() !== 'symbol') {
-				return false;
-			}
-			return symStringRegex.test(symToStr.call(value));
-		};
+	  if (descriptors && Constructor && !Constructor[SPECIES$3]) {
+	    defineProperty(Constructor, SPECIES$3, {
+	      configurable: true,
+	      get: function () { return this; }
+	    });
+	  }
+	};
 
-		module.exports = function isSymbol(value) {
-			if (typeof value === 'symbol') {
-				return true;
-			}
-			if (toStr.call(value) !== '[object Symbol]') {
-				return false;
-			}
-			try {
-				return isSymbolObject(value);
-			} catch (e) {
-				return false;
-			}
-		};
-	} else {
+	var ARRAY_BUFFER$1 = 'ArrayBuffer';
+	var ArrayBuffer$1 = arrayBuffer[ARRAY_BUFFER$1];
+	var NativeArrayBuffer$1 = global_1[ARRAY_BUFFER$1];
 
-		module.exports = function isSymbol(value) {
-			// this environment does not support Symbols.
-			return false ;
-		};
-	}
+	// `ArrayBuffer` constructor
+	// https://tc39.github.io/ecma262/#sec-arraybuffer-constructor
+	_export({ global: true, forced: NativeArrayBuffer$1 !== ArrayBuffer$1 }, {
+	  ArrayBuffer: ArrayBuffer$1
 	});
 
-	var hasSymbols$3 = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol';
-
-
+	setSpecies(ARRAY_BUFFER$1);
 
+	var TO_STRING_TAG$1 = wellKnownSymbol('toStringTag');
+	var test = {};
 
+	test[TO_STRING_TAG$1] = 'z';
 
+	var toStringTagSupport = String(test) === '[object z]';
 
-	var ordinaryToPrimitive = function OrdinaryToPrimitive(O, hint) {
-		if (typeof O === 'undefined' || O === null) {
-			throw new TypeError('Cannot call method on ' + O);
-		}
-		if (typeof hint !== 'string' || (hint !== 'number' && hint !== 'string')) {
-			throw new TypeError('hint must be "string" or "number"');
-		}
-		var methodNames = hint === 'string' ? ['toString', 'valueOf'] : ['valueOf', 'toString'];
-		var method, result, i;
-		for (i = 0; i < methodNames.length; ++i) {
-			method = O[methodNames[i]];
-			if (isCallable(method)) {
-				result = method.call(O);
-				if (isPrimitive$1(result)) {
-					return result;
-				}
-			}
-		}
-		throw new TypeError('No default value');
-	};
+	var TO_STRING_TAG$2 = wellKnownSymbol('toStringTag');
+	// ES3 wrong here
+	var CORRECT_ARGUMENTS = classofRaw(function () { return arguments; }()) == 'Arguments';
 
-	var GetMethod = function GetMethod(O, P) {
-		var func = O[P];
-		if (func !== null && typeof func !== 'undefined') {
-			if (!isCallable(func)) {
-				throw new TypeError(func + ' returned for property ' + P + ' of object ' + O + ' is not a function');
-			}
-			return func;
-		}
-		return void 0;
+	// fallback for IE11 Script Access Denied error
+	var tryGet = function (it, key) {
+	  try {
+	    return it[key];
+	  } catch (error) { /* empty */ }
 	};
 
-	// http://www.ecma-international.org/ecma-262/6.0/#sec-toprimitive
-	var es2015 = function ToPrimitive(input) {
-		if (isPrimitive$1(input)) {
-			return input;
-		}
-		var hint = 'default';
-		if (arguments.length > 1) {
-			if (arguments[1] === String) {
-				hint = 'string';
-			} else if (arguments[1] === Number) {
-				hint = 'number';
-			}
-		}
-
-		var exoticToPrim;
-		if (hasSymbols$3) {
-			if (Symbol.toPrimitive) {
-				exoticToPrim = GetMethod(input, Symbol.toPrimitive);
-			} else if (isSymbol$2(input)) {
-				exoticToPrim = Symbol.prototype.valueOf;
-			}
-		}
-		if (typeof exoticToPrim !== 'undefined') {
-			var result = exoticToPrim.call(input, hint);
-			if (isPrimitive$1(result)) {
-				return result;
-			}
-			throw new TypeError('unable to convert exotic object to primitive');
-		}
-		if (hint === 'default' && (isDateObject(input) || isSymbol$2(input))) {
-			hint = 'string';
-		}
-		return ordinaryToPrimitive(input, hint === 'default' ? 'number' : hint);
+	// getting tag from ES6+ `Object.prototype.toString`
+	var classof = toStringTagSupport ? classofRaw : function (it) {
+	  var O, tag, result;
+	  return it === undefined ? 'Undefined' : it === null ? 'Null'
+	    // @@toStringTag case
+	    : typeof (tag = tryGet(O = Object(it), TO_STRING_TAG$2)) == 'string' ? tag
+	    // builtinTag case
+	    : CORRECT_ARGUMENTS ? classofRaw(O)
+	    // ES3 arguments fallback
+	    : (result = classofRaw(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : result;
 	};
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-toprimitive
-
-	var ToPrimitive = function ToPrimitive(input) {
-		if (arguments.length > 1) {
-			return es2015(input, arguments[1]);
-		}
-		return es2015(input);
-	};
+	var defineProperty$5 = objectDefineProperty.f;
 
-	var $TypeError$2 = GetIntrinsic('%TypeError%');
-	var $Number$1 = GetIntrinsic('%Number%');
-	var $RegExp = GetIntrinsic('%RegExp%');
-	var $parseInteger = GetIntrinsic('%parseInt%');
 
 
 
 
+	var Int8Array$1 = global_1.Int8Array;
+	var Int8ArrayPrototype = Int8Array$1 && Int8Array$1.prototype;
+	var Uint8ClampedArray = global_1.Uint8ClampedArray;
+	var Uint8ClampedArrayPrototype = Uint8ClampedArray && Uint8ClampedArray.prototype;
+	var TypedArray = Int8Array$1 && objectGetPrototypeOf(Int8Array$1);
+	var TypedArrayPrototype = Int8ArrayPrototype && objectGetPrototypeOf(Int8ArrayPrototype);
+	var ObjectPrototype$3 = Object.prototype;
+	var isPrototypeOf = ObjectPrototype$3.isPrototypeOf;
 
-	var $strSlice = callBound('String.prototype.slice');
-	var isBinary = regexTester(/^0b[01]+$/i);
-	var isOctal = regexTester(/^0o[0-7]+$/i);
-	var isInvalidHexLiteral = regexTester(/^[-+]0x[0-9a-f]+$/i);
-	var nonWS = ['\u0085', '\u200b', '\ufffe'].join('');
-	var nonWSregex = new $RegExp('[' + nonWS + ']', 'g');
-	var hasNonWS = regexTester(nonWSregex);
+	var TO_STRING_TAG$3 = wellKnownSymbol('toStringTag');
+	var TYPED_ARRAY_TAG = uid('TYPED_ARRAY_TAG');
+	// Fixing native typed arrays in Opera Presto crashes the browser, see #595
+	var NATIVE_ARRAY_BUFFER_VIEWS = arrayBufferNative && !!objectSetPrototypeOf && classof(global_1.opera) !== 'Opera';
+	var TYPED_ARRAY_TAG_REQIRED = false;
+	var NAME;
 
-	// whitespace from: https://es5.github.io/#x15.5.4.20
-	// implementation from https://github.com/es-shims/es5-shim/blob/v3.4.0/es5-shim.js#L1304-L1324
-	var ws = [
-		'\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003',
-		'\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028',
-		'\u2029\uFEFF'
-	].join('');
-	var trimRegex = new RegExp('(^[' + ws + ']+)|([' + ws + ']+$)', 'g');
-	var $replace$1 = callBound('String.prototype.replace');
-	var $trim = function (value) {
-		return $replace$1(value, trimRegex, '');
+	var TypedArrayConstructorsList = {
+	  Int8Array: 1,
+	  Uint8Array: 1,
+	  Uint8ClampedArray: 1,
+	  Int16Array: 2,
+	  Uint16Array: 2,
+	  Int32Array: 4,
+	  Uint32Array: 4,
+	  Float32Array: 4,
+	  Float64Array: 8
 	};
 
-
-
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-tonumber
-
-	var ToNumber$1 = function ToNumber(argument) {
-		var value = isPrimitive(argument) ? argument : ToPrimitive(argument, $Number$1);
-		if (typeof value === 'symbol') {
-			throw new $TypeError$2('Cannot convert a Symbol value to a number');
-		}
-		if (typeof value === 'string') {
-			if (isBinary(value)) {
-				return ToNumber($parseInteger($strSlice(value, 2), 2));
-			} else if (isOctal(value)) {
-				return ToNumber($parseInteger($strSlice(value, 2), 8));
-			} else if (hasNonWS(value) || isInvalidHexLiteral(value)) {
-				return NaN;
-			} else {
-				var trimmed = $trim(value);
-				if (trimmed !== value) {
-					return ToNumber(trimmed);
-				}
-			}
-		}
-		return $Number$1(value);
+	var isView = function isView(it) {
+	  var klass = classof(it);
+	  return klass === 'DataView' || has(TypedArrayConstructorsList, klass);
 	};
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-tointeger
-
-	var ToInteger$1 = function ToInteger$1(value) {
-		var number = ToNumber$1(value);
-		return ToInteger(number);
+	var isTypedArray = function (it) {
+	  return isObject(it) && has(TypedArrayConstructorsList, classof(it));
 	};
 
-	var ToLength = function ToLength(argument) {
-		var len = ToInteger$1(argument);
-		if (len <= 0) { return 0; } // includes converting -0 to +0
-		if (len > maxSafeInteger) { return maxSafeInteger; }
-		return len;
+	var aTypedArray = function (it) {
+	  if (isTypedArray(it)) return it;
+	  throw TypeError('Target is not a typed array');
 	};
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.11
-
-	var IsCallable = isCallable;
-
-	var implementation$3 = function find(predicate) {
-		var list = ToObject(this);
-		var length = ToLength(list.length);
-		if (!IsCallable(predicate)) {
-			throw new TypeError('Array#find: predicate must be a function');
-		}
-		if (length === 0) {
-			return void 0;
-		}
-		var thisArg;
-		if (arguments.length > 0) {
-			thisArg = arguments[1];
-		}
-
-		for (var i = 0, value; i < length; i++) {
-			value = list[i];
-			// inlined for performance: if (Call(predicate, thisArg, [value, i, list])) {
-			if (predicate.apply(thisArg, [value, i, list])) {
-				return value;
-			}
-		}
-		return void 0;
+	var aTypedArrayConstructor = function (C) {
+	  if (objectSetPrototypeOf) {
+	    if (isPrototypeOf.call(TypedArray, C)) return C;
+	  } else for (var ARRAY in TypedArrayConstructorsList) if (has(TypedArrayConstructorsList, NAME)) {
+	    var TypedArrayConstructor = global_1[ARRAY];
+	    if (TypedArrayConstructor && (C === TypedArrayConstructor || isPrototypeOf.call(TypedArrayConstructor, C))) {
+	      return C;
+	    }
+	  } throw TypeError('Target is not a typed array constructor');
 	};
 
-	var polyfill$4 = function getPolyfill() {
-		// Detect if an implementation exists
-		// Detect early implementations which skipped holes in sparse arrays
-		// eslint-disable-next-line no-sparse-arrays
-		var implemented = Array.prototype.find && [, 1].find(function () {
-			return true;
-		}) !== 1;
+	var exportTypedArrayMethod = function (KEY, property, forced) {
+	  if (!descriptors) return;
+	  if (forced) for (var ARRAY in TypedArrayConstructorsList) {
+	    var TypedArrayConstructor = global_1[ARRAY];
+	    if (TypedArrayConstructor && has(TypedArrayConstructor.prototype, KEY)) {
+	      delete TypedArrayConstructor.prototype[KEY];
+	    }
+	  }
+	  if (!TypedArrayPrototype[KEY] || forced) {
+	    redefine(TypedArrayPrototype, KEY, forced ? property
+	      : NATIVE_ARRAY_BUFFER_VIEWS && Int8ArrayPrototype[KEY] || property);
+	  }
+	};
 
-		// eslint-disable-next-line global-require
-		return implemented ? Array.prototype.find : implementation$3;
+	var exportTypedArrayStaticMethod = function (KEY, property, forced) {
+	  var ARRAY, TypedArrayConstructor;
+	  if (!descriptors) return;
+	  if (objectSetPrototypeOf) {
+	    if (forced) for (ARRAY in TypedArrayConstructorsList) {
+	      TypedArrayConstructor = global_1[ARRAY];
+	      if (TypedArrayConstructor && has(TypedArrayConstructor, KEY)) {
+	        delete TypedArrayConstructor[KEY];
+	      }
+	    }
+	    if (!TypedArray[KEY] || forced) {
+	      // V8 ~ Chrome 49-50 `%TypedArray%` methods are non-writable non-configurable
+	      try {
+	        return redefine(TypedArray, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS && Int8Array$1[KEY] || property);
+	      } catch (error) { /* empty */ }
+	    } else return;
+	  }
+	  for (ARRAY in TypedArrayConstructorsList) {
+	    TypedArrayConstructor = global_1[ARRAY];
+	    if (TypedArrayConstructor && (!TypedArrayConstructor[KEY] || forced)) {
+	      redefine(TypedArrayConstructor, KEY, property);
+	    }
+	  }
 	};
 
-	var shim$8 = function shimArrayPrototypeFind() {
-		var polyfill = polyfill$4();
+	for (NAME in TypedArrayConstructorsList) {
+	  if (!global_1[NAME]) NATIVE_ARRAY_BUFFER_VIEWS = false;
+	}
 
-		defineProperties_1(Array.prototype, { find: polyfill }, {
-			find: function () {
-				return Array.prototype.find !== polyfill;
-			}
-		});
+	// WebKit bug - typed arrays constructors prototype is Object.prototype
+	if (!NATIVE_ARRAY_BUFFER_VIEWS || typeof TypedArray != 'function' || TypedArray === Function.prototype) {
+	  // eslint-disable-next-line no-shadow
+	  TypedArray = function TypedArray() {
+	    throw TypeError('Incorrect invocation');
+	  };
+	  if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {
+	    if (global_1[NAME]) objectSetPrototypeOf(global_1[NAME], TypedArray);
+	  }
+	}
 
-		return polyfill;
-	};
+	if (!NATIVE_ARRAY_BUFFER_VIEWS || !TypedArrayPrototype || TypedArrayPrototype === ObjectPrototype$3) {
+	  TypedArrayPrototype = TypedArray.prototype;
+	  if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {
+	    if (global_1[NAME]) objectSetPrototypeOf(global_1[NAME].prototype, TypedArrayPrototype);
+	  }
+	}
 
-	var slice$2 = Array.prototype.slice;
+	// WebKit bug - one more object in Uint8ClampedArray prototype chain
+	if (NATIVE_ARRAY_BUFFER_VIEWS && objectGetPrototypeOf(Uint8ClampedArrayPrototype) !== TypedArrayPrototype) {
+	  objectSetPrototypeOf(Uint8ClampedArrayPrototype, TypedArrayPrototype);
+	}
 
-	var polyfill$5 = polyfill$4();
+	if (descriptors && !has(TypedArrayPrototype, TO_STRING_TAG$3)) {
+	  TYPED_ARRAY_TAG_REQIRED = true;
+	  defineProperty$5(TypedArrayPrototype, TO_STRING_TAG$3, { get: function () {
+	    return isObject(this) ? this[TYPED_ARRAY_TAG] : undefined;
+	  } });
+	  for (NAME in TypedArrayConstructorsList) if (global_1[NAME]) {
+	    createNonEnumerableProperty(global_1[NAME], TYPED_ARRAY_TAG, NAME);
+	  }
+	}
 
-	var boundFindShim = function find(array, predicate) { // eslint-disable-line no-unused-vars
-		RequireObjectCoercible(array);
-		var args = slice$2.call(arguments, 1);
-		return polyfill$5.apply(array, args);
+	var arrayBufferViewCore = {
+	  NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS,
+	  TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQIRED && TYPED_ARRAY_TAG,
+	  aTypedArray: aTypedArray,
+	  aTypedArrayConstructor: aTypedArrayConstructor,
+	  exportTypedArrayMethod: exportTypedArrayMethod,
+	  exportTypedArrayStaticMethod: exportTypedArrayStaticMethod,
+	  isView: isView,
+	  isTypedArray: isTypedArray,
+	  TypedArray: TypedArray,
+	  TypedArrayPrototype: TypedArrayPrototype
 	};
 
-	defineProperties_1(boundFindShim, {
-		getPolyfill: polyfill$4,
-		implementation: implementation$3,
-		shim: shim$8
+	var NATIVE_ARRAY_BUFFER_VIEWS$1 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
+
+	// `ArrayBuffer.isView` method
+	// https://tc39.github.io/ecma262/#sec-arraybuffer.isview
+	_export({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS$1 }, {
+	  isView: arrayBufferViewCore.isView
 	});
 
-	var array_prototype_find = boundFindShim;
-
-	var implementation$4 = function findIndex(predicate) {
-		var list = ToObject(this);
-		var length = ToLength(list.length);
-		if (!IsCallable(predicate)) {
-			throw new TypeError('Array#findIndex: predicate must be a function');
-		}
-
-		if (length === 0) {
-			return -1;
-		}
-
-		var thisArg;
-		if (arguments.length > 0) {
-			thisArg = arguments[1];
-		}
-
-		for (var i = 0, value; i < length; i++) {
-			value = list[i];
-			// inlined for performance: if (Call(predicate, thisArg, [value, i, list])) return i;
-			if (predicate.apply(thisArg, [value, i, list])) {
-				return i;
-			}
-		}
+	var SPECIES$4 = wellKnownSymbol('species');
 
-		return -1;
+	// `SpeciesConstructor` abstract operation
+	// https://tc39.github.io/ecma262/#sec-speciesconstructor
+	var speciesConstructor = function (O, defaultConstructor) {
+	  var C = anObject(O).constructor;
+	  var S;
+	  return C === undefined || (S = anObject(C)[SPECIES$4]) == undefined ? defaultConstructor : aFunction$1(S);
 	};
 
-	var polyfill$6 = function getPolyfill() {
-		// Detect if an implementation exists
-		// Detect early implementations which skipped holes in sparse arrays
-		// eslint-disable-next-line no-sparse-arrays
-		var implemented = Array.prototype.findIndex && ([, 1].findIndex(function (item, idx) {
-			return idx === 0;
-		}) === 0);
-
-		return implemented ? Array.prototype.findIndex : implementation$4;
-	};
+	var ArrayBuffer$2 = arrayBuffer.ArrayBuffer;
+	var DataView$1 = arrayBuffer.DataView;
+	var nativeArrayBufferSlice = ArrayBuffer$2.prototype.slice;
 
-	var shim$9 = function shimFindIndex() {
-		var polyfill = polyfill$6();
+	var INCORRECT_SLICE = fails(function () {
+	  return !new ArrayBuffer$2(2).slice(1, undefined).byteLength;
+	});
 
-		defineProperties_1(Array.prototype, { findIndex: polyfill }, {
-			findIndex: function () {
-				return Array.prototype.findIndex !== polyfill;
-			}
-		});
+	// `ArrayBuffer.prototype.slice` method
+	// https://tc39.github.io/ecma262/#sec-arraybuffer.prototype.slice
+	_export({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE }, {
+	  slice: function slice(start, end) {
+	    if (nativeArrayBufferSlice !== undefined && end === undefined) {
+	      return nativeArrayBufferSlice.call(anObject(this), start); // FF fix
+	    }
+	    var length = anObject(this).byteLength;
+	    var first = toAbsoluteIndex(start, length);
+	    var fin = toAbsoluteIndex(end === undefined ? length : end, length);
+	    var result = new (speciesConstructor(this, ArrayBuffer$2))(toLength(fin - first));
+	    var viewSource = new DataView$1(this);
+	    var viewTarget = new DataView$1(result);
+	    var index = 0;
+	    while (first < fin) {
+	      viewTarget.setUint8(index++, viewSource.getUint8(first++));
+	    } return result;
+	  }
+	});
 
-		return polyfill;
-	};
+	// `DataView` constructor
+	// https://tc39.github.io/ecma262/#sec-dataview-constructor
+	_export({ global: true, forced: !arrayBufferNative }, {
+	  DataView: arrayBuffer.DataView
+	});
 
-	var slice$3 = Array.prototype.slice;
+	var defineProperty$6 = objectDefineProperty.f;
 
-	var polyfill$7 = polyfill$6();
+	var FunctionPrototype = Function.prototype;
+	var FunctionPrototypeToString = FunctionPrototype.toString;
+	var nameRE = /^\s*function ([^ (]*)/;
+	var NAME$1 = 'name';
 
-	var boundShim = function findIndex(array, predicate) { // eslint-disable-line no-unused-vars
-		RequireObjectCoercible(array);
-		var args = slice$3.call(arguments, 1);
-		return polyfill$7.apply(array, args);
-	};
+	// Function instances `.name` property
+	// https://tc39.github.io/ecma262/#sec-function-instances-name
+	if (descriptors && !(NAME$1 in FunctionPrototype)) {
+	  defineProperty$6(FunctionPrototype, NAME$1, {
+	    configurable: true,
+	    get: function () {
+	      try {
+	        return FunctionPrototypeToString.call(this).match(nameRE)[1];
+	      } catch (error) {
+	        return '';
+	      }
+	    }
+	  });
+	}
 
-	defineProperties_1(boundShim, {
-		getPolyfill: polyfill$6,
-		implementation: implementation$4,
-		shim: shim$9
+	// `Object.create` method
+	// https://tc39.github.io/ecma262/#sec-object.create
+	_export({ target: 'Object', stat: true, sham: !descriptors }, {
+	  create: objectCreate
 	});
 
-	var array_prototype_findindex = boundShim;
+	var nativeGetOwnPropertyNames$2 = objectGetOwnPropertyNamesExternal.f;
 
-	var $apply$1 = GetIntrinsic('%Reflect.apply%', true) || callBound('%Function.prototype.apply%');
+	var FAILS_ON_PRIMITIVES = fails(function () { return !Object.getOwnPropertyNames(1); });
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-call
+	// `Object.getOwnPropertyNames` method
+	// https://tc39.github.io/ecma262/#sec-object.getownpropertynames
+	_export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {
+	  getOwnPropertyNames: nativeGetOwnPropertyNames$2
+	});
 
-	var Call = function Call(F, V) {
-		var args = arguments.length > 2 ? arguments[2] : [];
-		return $apply$1(F, V, args);
+	// `Object.prototype.toString` method implementation
+	// https://tc39.github.io/ecma262/#sec-object.prototype.tostring
+	var objectToString = toStringTagSupport ? {}.toString : function toString() {
+	  return '[object ' + classof(this) + ']';
 	};
 
-	var $defineProperty = GetIntrinsic('%Object.defineProperty%', true);
-
-	if ($defineProperty) {
-		try {
-			$defineProperty({}, 'a', { value: 1 });
-		} catch (e) {
-			// IE 8 has a broken defineProperty
-			$defineProperty = null;
-		}
+	// `Object.prototype.toString` method
+	// https://tc39.github.io/ecma262/#sec-object.prototype.tostring
+	if (!toStringTagSupport) {
+	  redefine(Object.prototype, 'toString', objectToString, { unsafe: true });
 	}
 
+	var nativePromiseConstructor = global_1.Promise;
 
+	var ITERATOR$2 = wellKnownSymbol('iterator');
+	var ArrayPrototype$1 = Array.prototype;
 
-	var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
-
-	// eslint-disable-next-line max-params
-	var DefineOwnProperty = function DefineOwnProperty(IsDataDescriptor, SameValue, FromPropertyDescriptor, O, P, desc) {
-		if (!$defineProperty) {
-			if (!IsDataDescriptor(desc)) {
-				// ES3 does not support getters/setters
-				return false;
-			}
-			if (!desc['[[Configurable]]'] || !desc['[[Writable]]']) {
-				return false;
-			}
+	// check on default Array iterator
+	var isArrayIteratorMethod = function (it) {
+	  return it !== undefined && (iterators.Array === it || ArrayPrototype$1[ITERATOR$2] === it);
+	};
 
-			// fallback for ES3
-			if (P in O && $isEnumerable(O, P) !== !!desc['[[Enumerable]]']) {
-				// a non-enumerable existing property
-				return false;
-			}
+	var ITERATOR$3 = wellKnownSymbol('iterator');
 
-			// property does not exist at all, or exists but is enumerable
-			var V = desc['[[Value]]'];
-			// eslint-disable-next-line no-param-reassign
-			O[P] = V; // will use [[Define]]
-			return SameValue(O[P], V);
-		}
-		$defineProperty(O, P, FromPropertyDescriptor(desc));
-		return true;
+	var getIteratorMethod = function (it) {
+	  if (it != undefined) return it[ITERATOR$3]
+	    || it['@@iterator']
+	    || iterators[classof(it)];
 	};
 
-	var src = functionBind.call(Function.call, Object.prototype.hasOwnProperty);
-
-	var $TypeError$3 = GetIntrinsic('%TypeError%');
-	var $SyntaxError = GetIntrinsic('%SyntaxError%');
+	// call something on iterator step with safe closing on error
+	var callWithSafeIterationClosing = function (iterator, fn, value, ENTRIES) {
+	  try {
+	    return ENTRIES ? fn(anObject(value)[0], value[1]) : fn(value);
+	  // 7.4.6 IteratorClose(iterator, completion)
+	  } catch (error) {
+	    var returnMethod = iterator['return'];
+	    if (returnMethod !== undefined) anObject(returnMethod.call(iterator));
+	    throw error;
+	  }
+	};
 
+	var iterate_1 = createCommonjsModule(function (module) {
+	var Result = function (stopped, result) {
+	  this.stopped = stopped;
+	  this.result = result;
+	};
 
+	var iterate = module.exports = function (iterable, fn, that, AS_ENTRIES, IS_ITERATOR) {
+	  var boundFunction = functionBindContext(fn, that, AS_ENTRIES ? 2 : 1);
+	  var iterator, iterFn, index, length, result, next, step;
 
-	var predicates = {
-		// https://ecma-international.org/ecma-262/6.0/#sec-property-descriptor-specification-type
-		'Property Descriptor': function isPropertyDescriptor(Type, Desc) {
-			if (Type(Desc) !== 'Object') {
-				return false;
-			}
-			var allowed = {
-				'[[Configurable]]': true,
-				'[[Enumerable]]': true,
-				'[[Get]]': true,
-				'[[Set]]': true,
-				'[[Value]]': true,
-				'[[Writable]]': true
-			};
-
-			for (var key in Desc) { // eslint-disable-line
-				if (src(Desc, key) && !allowed[key]) {
-					return false;
-				}
-			}
+	  if (IS_ITERATOR) {
+	    iterator = iterable;
+	  } else {
+	    iterFn = getIteratorMethod(iterable);
+	    if (typeof iterFn != 'function') throw TypeError('Target is not iterable');
+	    // optimisation for array iterators
+	    if (isArrayIteratorMethod(iterFn)) {
+	      for (index = 0, length = toLength(iterable.length); length > index; index++) {
+	        result = AS_ENTRIES
+	          ? boundFunction(anObject(step = iterable[index])[0], step[1])
+	          : boundFunction(iterable[index]);
+	        if (result && result instanceof Result) return result;
+	      } return new Result(false);
+	    }
+	    iterator = iterFn.call(iterable);
+	  }
 
-			var isData = src(Desc, '[[Value]]');
-			var IsAccessor = src(Desc, '[[Get]]') || src(Desc, '[[Set]]');
-			if (isData && IsAccessor) {
-				throw new $TypeError$3('Property Descriptors may not be both accessor and data descriptors');
-			}
-			return true;
-		}
+	  next = iterator.next;
+	  while (!(step = next.call(iterator)).done) {
+	    result = callWithSafeIterationClosing(iterator, boundFunction, step.value, AS_ENTRIES);
+	    if (typeof result == 'object' && result && result instanceof Result) return result;
+	  } return new Result(false);
 	};
 
-	var assertRecord = function assertRecord(Type, recordType, argumentName, value) {
-		var predicate = predicates[recordType];
-		if (typeof predicate !== 'function') {
-			throw new $SyntaxError('unknown record type: ' + recordType);
-		}
-		if (!predicate(Type, value)) {
-			throw new $TypeError$3(argumentName + ' must be a ' + recordType);
-		}
+	iterate.stop = function (result) {
+	  return new Result(true, result);
 	};
+	});
 
-	// https://www.ecma-international.org/ecma-262/5.1/#sec-8
-
-	var Type = function Type(x) {
-		if (x === null) {
-			return 'Null';
-		}
-		if (typeof x === 'undefined') {
-			return 'Undefined';
-		}
-		if (typeof x === 'function' || typeof x === 'object') {
-			return 'Object';
-		}
-		if (typeof x === 'number') {
-			return 'Number';
-		}
-		if (typeof x === 'boolean') {
-			return 'Boolean';
-		}
-		if (typeof x === 'string') {
-			return 'String';
-		}
-	};
+	var ITERATOR$4 = wellKnownSymbol('iterator');
+	var SAFE_CLOSING = false;
 
-	// https://ecma-international.org/ecma-262/6.0/#sec-ecmascript-data-types-and-values
+	try {
+	  var called = 0;
+	  var iteratorWithReturn = {
+	    next: function () {
+	      return { done: !!called++ };
+	    },
+	    'return': function () {
+	      SAFE_CLOSING = true;
+	    }
+	  };
+	  iteratorWithReturn[ITERATOR$4] = function () {
+	    return this;
+	  };
+	  // eslint-disable-next-line no-throw-literal
+	  Array.from(iteratorWithReturn, function () { throw 2; });
+	} catch (error) { /* empty */ }
 
-	var Type$1 = function Type$1(x) {
-		if (typeof x === 'symbol') {
-			return 'Symbol';
-		}
-		return Type(x);
-	};
+	var checkCorrectnessOfIteration = function (exec, SKIP_CLOSING) {
+	  if (!SKIP_CLOSING && !SAFE_CLOSING) return false;
+	  var ITERATION_SUPPORT = false;
+	  try {
+	    var object = {};
+	    object[ITERATOR$4] = function () {
+	      return {
+	        next: function () {
+	          return { done: ITERATION_SUPPORT = true };
+	        }
+	      };
+	    };
+	    exec(object);
+	  } catch (error) { /* empty */ }
+	  return ITERATION_SUPPORT;
+	};
+
+	var engineIsIos = /(iphone|ipod|ipad).*applewebkit/i.test(engineUserAgent);
+
+	var location$1 = global_1.location;
+	var set$2 = global_1.setImmediate;
+	var clear = global_1.clearImmediate;
+	var process$2 = global_1.process;
+	var MessageChannel = global_1.MessageChannel;
+	var Dispatch = global_1.Dispatch;
+	var counter = 0;
+	var queue = {};
+	var ONREADYSTATECHANGE = 'onreadystatechange';
+	var defer, channel, port;
+
+	var run = function (id) {
+	  // eslint-disable-next-line no-prototype-builtins
+	  if (queue.hasOwnProperty(id)) {
+	    var fn = queue[id];
+	    delete queue[id];
+	    fn();
+	  }
+	};
+
+	var runner = function (id) {
+	  return function () {
+	    run(id);
+	  };
+	};
+
+	var listener = function (event) {
+	  run(event.data);
+	};
+
+	var post = function (id) {
+	  // old engines have not location.origin
+	  global_1.postMessage(id + '', location$1.protocol + '//' + location$1.host);
+	};
+
+	// Node.js 0.9+ & IE10+ has setImmediate, otherwise:
+	if (!set$2 || !clear) {
+	  set$2 = function setImmediate(fn) {
+	    var args = [];
+	    var i = 1;
+	    while (arguments.length > i) args.push(arguments[i++]);
+	    queue[++counter] = function () {
+	      // eslint-disable-next-line no-new-func
+	      (typeof fn == 'function' ? fn : Function(fn)).apply(undefined, args);
+	    };
+	    defer(counter);
+	    return counter;
+	  };
+	  clear = function clearImmediate(id) {
+	    delete queue[id];
+	  };
+	  // Node.js 0.8-
+	  if (classofRaw(process$2) == 'process') {
+	    defer = function (id) {
+	      process$2.nextTick(runner(id));
+	    };
+	  // Sphere (JS game engine) Dispatch API
+	  } else if (Dispatch && Dispatch.now) {
+	    defer = function (id) {
+	      Dispatch.now(runner(id));
+	    };
+	  // Browsers with MessageChannel, includes WebWorkers
+	  // except iOS - https://github.com/zloirock/core-js/issues/624
+	  } else if (MessageChannel && !engineIsIos) {
+	    channel = new MessageChannel();
+	    port = channel.port2;
+	    channel.port1.onmessage = listener;
+	    defer = functionBindContext(port.postMessage, port, 1);
+	  // Browsers with postMessage, skip WebWorkers
+	  // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
+	  } else if (
+	    global_1.addEventListener &&
+	    typeof postMessage == 'function' &&
+	    !global_1.importScripts &&
+	    !fails(post) &&
+	    location$1.protocol !== 'file:'
+	  ) {
+	    defer = post;
+	    global_1.addEventListener('message', listener, false);
+	  // IE8-
+	  } else if (ONREADYSTATECHANGE in documentCreateElement('script')) {
+	    defer = function (id) {
+	      html.appendChild(documentCreateElement('script'))[ONREADYSTATECHANGE] = function () {
+	        html.removeChild(this);
+	        run(id);
+	      };
+	    };
+	  // Rest old browsers
+	  } else {
+	    defer = function (id) {
+	      setTimeout(runner(id), 0);
+	    };
+	  }
+	}
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-frompropertydescriptor
-
-	var FromPropertyDescriptor = function FromPropertyDescriptor(Desc) {
-		if (typeof Desc === 'undefined') {
-			return Desc;
-		}
-
-		assertRecord(Type$1, 'Property Descriptor', 'Desc', Desc);
-
-		var obj = {};
-		if ('[[Value]]' in Desc) {
-			obj.value = Desc['[[Value]]'];
-		}
-		if ('[[Writable]]' in Desc) {
-			obj.writable = Desc['[[Writable]]'];
-		}
-		if ('[[Get]]' in Desc) {
-			obj.get = Desc['[[Get]]'];
-		}
-		if ('[[Set]]' in Desc) {
-			obj.set = Desc['[[Set]]'];
-		}
-		if ('[[Enumerable]]' in Desc) {
-			obj.enumerable = Desc['[[Enumerable]]'];
-		}
-		if ('[[Configurable]]' in Desc) {
-			obj.configurable = Desc['[[Configurable]]'];
-		}
-		return obj;
+	var task = {
+	  set: set$2,
+	  clear: clear
 	};
 
-	var $gOPD$1 = GetIntrinsic('%Object.getOwnPropertyDescriptor%');
-	if ($gOPD$1) {
-		try {
-			$gOPD$1([], 'length');
-		} catch (e) {
-			// IE 8 has a broken gOPD
-			$gOPD$1 = null;
-		}
-	}
+	var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
+
+	var macrotask = task.set;
 
-	var getOwnPropertyDescriptor = $gOPD$1;
 
-	var $Array = GetIntrinsic('%Array%');
+	var MutationObserver = global_1.MutationObserver || global_1.WebKitMutationObserver;
+	var process$3 = global_1.process;
+	var Promise$1 = global_1.Promise;
+	var IS_NODE = classofRaw(process$3) == 'process';
+	// Node.js 11 shows ExperimentalWarning on getting `queueMicrotask`
+	var queueMicrotaskDescriptor = getOwnPropertyDescriptor$2(global_1, 'queueMicrotask');
+	var queueMicrotask = queueMicrotaskDescriptor && queueMicrotaskDescriptor.value;
 
-	// eslint-disable-next-line global-require
-	var toStr$6 = !$Array.isArray && callBound('Object.prototype.toString');
+	var flush, head, last, notify, toggle, node, promise, then;
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isarray
+	// modern engines have queueMicrotask method
+	if (!queueMicrotask) {
+	  flush = function () {
+	    var parent, fn;
+	    if (IS_NODE && (parent = process$3.domain)) parent.exit();
+	    while (head) {
+	      fn = head.fn;
+	      head = head.next;
+	      try {
+	        fn();
+	      } catch (error) {
+	        if (head) notify();
+	        else last = undefined;
+	        throw error;
+	      }
+	    } last = undefined;
+	    if (parent) parent.enter();
+	  };
+
+	  // Node.js
+	  if (IS_NODE) {
+	    notify = function () {
+	      process$3.nextTick(flush);
+	    };
+	  // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339
+	  } else if (MutationObserver && !engineIsIos) {
+	    toggle = true;
+	    node = document.createTextNode('');
+	    new MutationObserver(flush).observe(node, { characterData: true });
+	    notify = function () {
+	      node.data = toggle = !toggle;
+	    };
+	  // environments with maybe non-completely correct, but existent Promise
+	  } else if (Promise$1 && Promise$1.resolve) {
+	    // Promise.resolve without an argument throws an error in LG WebOS 2
+	    promise = Promise$1.resolve(undefined);
+	    then = promise.then;
+	    notify = function () {
+	      then.call(promise, flush);
+	    };
+	  // for other environments - macrotask based on:
+	  // - setImmediate
+	  // - MessageChannel
+	  // - window.postMessag
+	  // - onreadystatechange
+	  // - setTimeout
+	  } else {
+	    notify = function () {
+	      // strange IE + webpack dev server bug - use .call(global)
+	      macrotask.call(global_1, flush);
+	    };
+	  }
+	}
 
-	var IsArray = $Array.isArray || function IsArray(argument) {
-		return toStr$6(argument) === '[object Array]';
+	var microtask = queueMicrotask || function (fn) {
+	  var task = { fn: fn, next: undefined };
+	  if (last) last.next = task;
+	  if (!head) {
+	    head = task;
+	    notify();
+	  } last = task;
 	};
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-ispropertykey
+	var PromiseCapability = function (C) {
+	  var resolve, reject;
+	  this.promise = new C(function ($$resolve, $$reject) {
+	    if (resolve !== undefined || reject !== undefined) throw TypeError('Bad Promise constructor');
+	    resolve = $$resolve;
+	    reject = $$reject;
+	  });
+	  this.resolve = aFunction$1(resolve);
+	  this.reject = aFunction$1(reject);
+	};
 
-	var IsPropertyKey = function IsPropertyKey(argument) {
-		return typeof argument === 'string' || typeof argument === 'symbol';
+	// 25.4.1.5 NewPromiseCapability(C)
+	var f$7 = function (C) {
+	  return new PromiseCapability(C);
 	};
 
-	var hasSymbols$4 = hasSymbols$1();
-	var hasToStringTag$2 = hasSymbols$4 && typeof Symbol.toStringTag === 'symbol';
-	var regexExec;
-	var isRegexMarker;
-	var badStringifier;
-
-	if (hasToStringTag$2) {
-		regexExec = Function.call.bind(RegExp.prototype.exec);
-		isRegexMarker = {};
-
-		var throwRegexMarker = function () {
-			throw isRegexMarker;
-		};
-		badStringifier = {
-			toString: throwRegexMarker,
-			valueOf: throwRegexMarker
-		};
-
-		if (typeof Symbol.toPrimitive === 'symbol') {
-			badStringifier[Symbol.toPrimitive] = throwRegexMarker;
-		}
-	}
-
-	var toStr$7 = Object.prototype.toString;
-	var regexClass = '[object RegExp]';
-
-	var isRegex = hasToStringTag$2
-		// eslint-disable-next-line consistent-return
-		? function isRegex(value) {
-			if (!value || typeof value !== 'object') {
-				return false;
-			}
+	var newPromiseCapability = {
+		f: f$7
+	};
 
-			try {
-				regexExec(value, badStringifier);
-			} catch (e) {
-				return e === isRegexMarker;
-			}
-		}
-		: function isRegex(value) {
-			// In older browsers, typeof regex incorrectly returns 'function'
-			if (!value || (typeof value !== 'object' && typeof value !== 'function')) {
-				return false;
-			}
+	var promiseResolve = function (C, x) {
+	  anObject(C);
+	  if (isObject(x) && x.constructor === C) return x;
+	  var promiseCapability = newPromiseCapability.f(C);
+	  var resolve = promiseCapability.resolve;
+	  resolve(x);
+	  return promiseCapability.promise;
+	};
 
-			return toStr$7.call(value) === regexClass;
-		};
+	var hostReportErrors = function (a, b) {
+	  var console = global_1.console;
+	  if (console && console.error) {
+	    arguments.length === 1 ? console.error(a) : console.error(a, b);
+	  }
+	};
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.2
+	var perform = function (exec) {
+	  try {
+	    return { error: false, value: exec() };
+	  } catch (error) {
+	    return { error: true, value: error };
+	  }
+	};
 
-	var ToBoolean = function ToBoolean(value) { return !!value; };
+	var task$1 = task.set;
 
-	var $match = GetIntrinsic('%Symbol.match%', true);
 
 
 
 
 
-	// https://ecma-international.org/ecma-262/6.0/#sec-isregexp
 
-	var IsRegExp = function IsRegExp(argument) {
-		if (!argument || typeof argument !== 'object') {
-			return false;
-		}
-		if ($match) {
-			var isRegExp = argument[$match];
-			if (typeof isRegExp !== 'undefined') {
-				return ToBoolean(isRegExp);
-			}
-		}
-		return isRegex(argument);
-	};
 
-	var $TypeError$4 = GetIntrinsic('%TypeError%');
 
 
+	var SPECIES$5 = wellKnownSymbol('species');
+	var PROMISE = 'Promise';
+	var getInternalState$3 = internalState.get;
+	var setInternalState$3 = internalState.set;
+	var getInternalPromiseState = internalState.getterFor(PROMISE);
+	var PromiseConstructor = nativePromiseConstructor;
+	var TypeError$1 = global_1.TypeError;
+	var document$2 = global_1.document;
+	var process$4 = global_1.process;
+	var $fetch = getBuiltIn('fetch');
+	var newPromiseCapability$1 = newPromiseCapability.f;
+	var newGenericPromiseCapability = newPromiseCapability$1;
+	var IS_NODE$1 = classofRaw(process$4) == 'process';
+	var DISPATCH_EVENT = !!(document$2 && document$2.createEvent && global_1.dispatchEvent);
+	var UNHANDLED_REJECTION = 'unhandledrejection';
+	var REJECTION_HANDLED = 'rejectionhandled';
+	var PENDING = 0;
+	var FULFILLED = 1;
+	var REJECTED = 2;
+	var HANDLED = 1;
+	var UNHANDLED = 2;
+	var Internal, OwnPromiseCapability, PromiseWrapper, nativeThen;
 
+	var FORCED = isForced_1(PROMISE, function () {
+	  var GLOBAL_CORE_JS_PROMISE = inspectSource(PromiseConstructor) !== String(PromiseConstructor);
+	  if (!GLOBAL_CORE_JS_PROMISE) {
+	    // V8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables
+	    // https://bugs.chromium.org/p/chromium/issues/detail?id=830565
+	    // We can't detect it synchronously, so just check versions
+	    if (engineV8Version === 66) return true;
+	    // Unhandled rejections tracking support, NodeJS Promise without it fails @@species test
+	    if (!IS_NODE$1 && typeof PromiseRejectionEvent != 'function') return true;
+	  }
+	  // We can't use @@species feature detection in V8 since it causes
+	  // deoptimization and performance degradation
+	  // https://github.com/zloirock/core-js/issues/679
+	  if (engineV8Version >= 51 && /native code/.test(PromiseConstructor)) return false;
+	  // Detect correctness of subclassing with @@species support
+	  var promise = PromiseConstructor.resolve(1);
+	  var FakePromise = function (exec) {
+	    exec(function () { /* empty */ }, function () { /* empty */ });
+	  };
+	  var constructor = promise.constructor = {};
+	  constructor[SPECIES$5] = FakePromise;
+	  return !(promise.then(function () { /* empty */ }) instanceof FakePromise);
+	});
 
+	var INCORRECT_ITERATION = FORCED || !checkCorrectnessOfIteration(function (iterable) {
+	  PromiseConstructor.all(iterable)['catch'](function () { /* empty */ });
+	});
 
-	// https://ecma-international.org/ecma-262/5.1/#sec-8.10.5
+	// helpers
+	var isThenable = function (it) {
+	  var then;
+	  return isObject(it) && typeof (then = it.then) == 'function' ? then : false;
+	};
+
+	var notify$1 = function (promise, state, isReject) {
+	  if (state.notified) return;
+	  state.notified = true;
+	  var chain = state.reactions;
+	  microtask(function () {
+	    var value = state.value;
+	    var ok = state.state == FULFILLED;
+	    var index = 0;
+	    // variable length - can't use forEach
+	    while (chain.length > index) {
+	      var reaction = chain[index++];
+	      var handler = ok ? reaction.ok : reaction.fail;
+	      var resolve = reaction.resolve;
+	      var reject = reaction.reject;
+	      var domain = reaction.domain;
+	      var result, then, exited;
+	      try {
+	        if (handler) {
+	          if (!ok) {
+	            if (state.rejection === UNHANDLED) onHandleUnhandled(promise, state);
+	            state.rejection = HANDLED;
+	          }
+	          if (handler === true) result = value;
+	          else {
+	            if (domain) domain.enter();
+	            result = handler(value); // can throw
+	            if (domain) {
+	              domain.exit();
+	              exited = true;
+	            }
+	          }
+	          if (result === reaction.promise) {
+	            reject(TypeError$1('Promise-chain cycle'));
+	          } else if (then = isThenable(result)) {
+	            then.call(result, resolve, reject);
+	          } else resolve(result);
+	        } else reject(value);
+	      } catch (error) {
+	        if (domain && !exited) domain.exit();
+	        reject(error);
+	      }
+	    }
+	    state.reactions = [];
+	    state.notified = false;
+	    if (isReject && !state.rejection) onUnhandled(promise, state);
+	  });
+	};
 
-	var ToPropertyDescriptor = function ToPropertyDescriptor(Obj) {
-		if (Type$1(Obj) !== 'Object') {
-			throw new $TypeError$4('ToPropertyDescriptor requires an object');
-		}
+	var dispatchEvent = function (name, promise, reason) {
+	  var event, handler;
+	  if (DISPATCH_EVENT) {
+	    event = document$2.createEvent('Event');
+	    event.promise = promise;
+	    event.reason = reason;
+	    event.initEvent(name, false, true);
+	    global_1.dispatchEvent(event);
+	  } else event = { promise: promise, reason: reason };
+	  if (handler = global_1['on' + name]) handler(event);
+	  else if (name === UNHANDLED_REJECTION) hostReportErrors('Unhandled promise rejection', reason);
+	};
+
+	var onUnhandled = function (promise, state) {
+	  task$1.call(global_1, function () {
+	    var value = state.value;
+	    var IS_UNHANDLED = isUnhandled(state);
+	    var result;
+	    if (IS_UNHANDLED) {
+	      result = perform(function () {
+	        if (IS_NODE$1) {
+	          process$4.emit('unhandledRejection', value, promise);
+	        } else dispatchEvent(UNHANDLED_REJECTION, promise, value);
+	      });
+	      // Browsers should not trigger `rejectionHandled` event if it was handled here, NodeJS - should
+	      state.rejection = IS_NODE$1 || isUnhandled(state) ? UNHANDLED : HANDLED;
+	      if (result.error) throw result.value;
+	    }
+	  });
+	};
 
-		var desc = {};
-		if (src(Obj, 'enumerable')) {
-			desc['[[Enumerable]]'] = ToBoolean(Obj.enumerable);
-		}
-		if (src(Obj, 'configurable')) {
-			desc['[[Configurable]]'] = ToBoolean(Obj.configurable);
-		}
-		if (src(Obj, 'value')) {
-			desc['[[Value]]'] = Obj.value;
-		}
-		if (src(Obj, 'writable')) {
-			desc['[[Writable]]'] = ToBoolean(Obj.writable);
-		}
-		if (src(Obj, 'get')) {
-			var getter = Obj.get;
-			if (typeof getter !== 'undefined' && !IsCallable(getter)) {
-				throw new TypeError('getter must be a function');
-			}
-			desc['[[Get]]'] = getter;
-		}
-		if (src(Obj, 'set')) {
-			var setter = Obj.set;
-			if (typeof setter !== 'undefined' && !IsCallable(setter)) {
-				throw new $TypeError$4('setter must be a function');
-			}
-			desc['[[Set]]'] = setter;
-		}
+	var isUnhandled = function (state) {
+	  return state.rejection !== HANDLED && !state.parent;
+	};
 
-		if ((src(desc, '[[Get]]') || src(desc, '[[Set]]')) && (src(desc, '[[Value]]') || src(desc, '[[Writable]]'))) {
-			throw new $TypeError$4('Invalid property descriptor. Cannot both specify accessors and a value or writable attribute');
-		}
-		return desc;
+	var onHandleUnhandled = function (promise, state) {
+	  task$1.call(global_1, function () {
+	    if (IS_NODE$1) {
+	      process$4.emit('rejectionHandled', promise);
+	    } else dispatchEvent(REJECTION_HANDLED, promise, state.value);
+	  });
 	};
 
-	var $TypeError$5 = GetIntrinsic('%TypeError%');
+	var bind = function (fn, promise, state, unwrap) {
+	  return function (value) {
+	    fn(promise, state, value, unwrap);
+	  };
+	};
 
+	var internalReject = function (promise, state, value, unwrap) {
+	  if (state.done) return;
+	  state.done = true;
+	  if (unwrap) state = unwrap;
+	  state.value = value;
+	  state.state = REJECTED;
+	  notify$1(promise, state, true);
+	};
+
+	var internalResolve = function (promise, state, value, unwrap) {
+	  if (state.done) return;
+	  state.done = true;
+	  if (unwrap) state = unwrap;
+	  try {
+	    if (promise === value) throw TypeError$1("Promise can't be resolved itself");
+	    var then = isThenable(value);
+	    if (then) {
+	      microtask(function () {
+	        var wrapper = { done: false };
+	        try {
+	          then.call(value,
+	            bind(internalResolve, promise, wrapper, state),
+	            bind(internalReject, promise, wrapper, state)
+	          );
+	        } catch (error) {
+	          internalReject(promise, wrapper, error, state);
+	        }
+	      });
+	    } else {
+	      state.value = value;
+	      state.state = FULFILLED;
+	      notify$1(promise, state, false);
+	    }
+	  } catch (error) {
+	    internalReject(promise, { done: false }, error, state);
+	  }
+	};
 
+	// constructor polyfill
+	if (FORCED) {
+	  // 25.4.3.1 Promise(executor)
+	  PromiseConstructor = function Promise(executor) {
+	    anInstance(this, PromiseConstructor, PROMISE);
+	    aFunction$1(executor);
+	    Internal.call(this);
+	    var state = getInternalState$3(this);
+	    try {
+	      executor(bind(internalResolve, this, state), bind(internalReject, this, state));
+	    } catch (error) {
+	      internalReject(this, state, error);
+	    }
+	  };
+	  // eslint-disable-next-line no-unused-vars
+	  Internal = function Promise(executor) {
+	    setInternalState$3(this, {
+	      type: PROMISE,
+	      done: false,
+	      notified: false,
+	      parent: false,
+	      reactions: [],
+	      rejection: false,
+	      state: PENDING,
+	      value: undefined
+	    });
+	  };
+	  Internal.prototype = redefineAll(PromiseConstructor.prototype, {
+	    // `Promise.prototype.then` method
+	    // https://tc39.github.io/ecma262/#sec-promise.prototype.then
+	    then: function then(onFulfilled, onRejected) {
+	      var state = getInternalPromiseState(this);
+	      var reaction = newPromiseCapability$1(speciesConstructor(this, PromiseConstructor));
+	      reaction.ok = typeof onFulfilled == 'function' ? onFulfilled : true;
+	      reaction.fail = typeof onRejected == 'function' && onRejected;
+	      reaction.domain = IS_NODE$1 ? process$4.domain : undefined;
+	      state.parent = true;
+	      state.reactions.push(reaction);
+	      if (state.state != PENDING) notify$1(this, state, false);
+	      return reaction.promise;
+	    },
+	    // `Promise.prototype.catch` method
+	    // https://tc39.github.io/ecma262/#sec-promise.prototype.catch
+	    'catch': function (onRejected) {
+	      return this.then(undefined, onRejected);
+	    }
+	  });
+	  OwnPromiseCapability = function () {
+	    var promise = new Internal();
+	    var state = getInternalState$3(promise);
+	    this.promise = promise;
+	    this.resolve = bind(internalResolve, promise, state);
+	    this.reject = bind(internalReject, promise, state);
+	  };
+	  newPromiseCapability.f = newPromiseCapability$1 = function (C) {
+	    return C === PromiseConstructor || C === PromiseWrapper
+	      ? new OwnPromiseCapability(C)
+	      : newGenericPromiseCapability(C);
+	  };
+
+	  if ( typeof nativePromiseConstructor == 'function') {
+	    nativeThen = nativePromiseConstructor.prototype.then;
+
+	    // wrap native Promise#then for native async functions
+	    redefine(nativePromiseConstructor.prototype, 'then', function then(onFulfilled, onRejected) {
+	      var that = this;
+	      return new PromiseConstructor(function (resolve, reject) {
+	        nativeThen.call(that, resolve, reject);
+	      }).then(onFulfilled, onRejected);
+	    // https://github.com/zloirock/core-js/issues/640
+	    }, { unsafe: true });
+
+	    // wrap fetch result
+	    if (typeof $fetch == 'function') _export({ global: true, enumerable: true, forced: true }, {
+	      // eslint-disable-next-line no-unused-vars
+	      fetch: function fetch(input /* , init */) {
+	        return promiseResolve(PromiseConstructor, $fetch.apply(global_1, arguments));
+	      }
+	    });
+	  }
+	}
 
-	var $isEnumerable$1 = callBound('Object.prototype.propertyIsEnumerable');
+	_export({ global: true, wrap: true, forced: FORCED }, {
+	  Promise: PromiseConstructor
+	});
 
+	setToStringTag(PromiseConstructor, PROMISE, false);
+	setSpecies(PROMISE);
 
+	PromiseWrapper = getBuiltIn(PROMISE);
 
+	// statics
+	_export({ target: PROMISE, stat: true, forced: FORCED }, {
+	  // `Promise.reject` method
+	  // https://tc39.github.io/ecma262/#sec-promise.reject
+	  reject: function reject(r) {
+	    var capability = newPromiseCapability$1(this);
+	    capability.reject.call(undefined, r);
+	    return capability.promise;
+	  }
+	});
 
+	_export({ target: PROMISE, stat: true, forced:  FORCED }, {
+	  // `Promise.resolve` method
+	  // https://tc39.github.io/ecma262/#sec-promise.resolve
+	  resolve: function resolve(x) {
+	    return promiseResolve( this, x);
+	  }
+	});
 
+	_export({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION }, {
+	  // `Promise.all` method
+	  // https://tc39.github.io/ecma262/#sec-promise.all
+	  all: function all(iterable) {
+	    var C = this;
+	    var capability = newPromiseCapability$1(C);
+	    var resolve = capability.resolve;
+	    var reject = capability.reject;
+	    var result = perform(function () {
+	      var $promiseResolve = aFunction$1(C.resolve);
+	      var values = [];
+	      var counter = 0;
+	      var remaining = 1;
+	      iterate_1(iterable, function (promise) {
+	        var index = counter++;
+	        var alreadyCalled = false;
+	        values.push(undefined);
+	        remaining++;
+	        $promiseResolve.call(C, promise).then(function (value) {
+	          if (alreadyCalled) return;
+	          alreadyCalled = true;
+	          values[index] = value;
+	          --remaining || resolve(values);
+	        }, reject);
+	      });
+	      --remaining || resolve(values);
+	    });
+	    if (result.error) reject(result.value);
+	    return capability.promise;
+	  },
+	  // `Promise.race` method
+	  // https://tc39.github.io/ecma262/#sec-promise.race
+	  race: function race(iterable) {
+	    var C = this;
+	    var capability = newPromiseCapability$1(C);
+	    var reject = capability.reject;
+	    var result = perform(function () {
+	      var $promiseResolve = aFunction$1(C.resolve);
+	      iterate_1(iterable, function (promise) {
+	        $promiseResolve.call(C, promise).then(capability.resolve, reject);
+	      });
+	    });
+	    if (result.error) reject(result.value);
+	    return capability.promise;
+	  }
+	});
 
+	// `RegExp.prototype.flags` getter implementation
+	// https://tc39.github.io/ecma262/#sec-get-regexp.prototype.flags
+	var regexpFlags = function () {
+	  var that = anObject(this);
+	  var result = '';
+	  if (that.global) result += 'g';
+	  if (that.ignoreCase) result += 'i';
+	  if (that.multiline) result += 'm';
+	  if (that.dotAll) result += 's';
+	  if (that.unicode) result += 'u';
+	  if (that.sticky) result += 'y';
+	  return result;
+	};
 
+	// babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError,
+	// so we use an intermediate function.
+	function RE(s, f) {
+	  return RegExp(s, f);
+	}
 
+	var UNSUPPORTED_Y = fails(function () {
+	  // babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError
+	  var re = RE('a', 'y');
+	  re.lastIndex = 2;
+	  return re.exec('abcd') != null;
+	});
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-ordinarygetownproperty
+	var BROKEN_CARET = fails(function () {
+	  // https://bugzilla.mozilla.org/show_bug.cgi?id=773687
+	  var re = RE('^r', 'gy');
+	  re.lastIndex = 2;
+	  return re.exec('str') != null;
+	});
 
-	var OrdinaryGetOwnProperty = function OrdinaryGetOwnProperty(O, P) {
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$5('Assertion failed: O must be an Object');
-		}
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$5('Assertion failed: P must be a Property Key');
-		}
-		if (!src(O, P)) {
-			return void 0;
-		}
-		if (!getOwnPropertyDescriptor) {
-			// ES3 / IE 8 fallback
-			var arrayLength = IsArray(O) && P === 'length';
-			var regexLastIndex = IsRegExp(O) && P === 'lastIndex';
-			return {
-				'[[Configurable]]': !(arrayLength || regexLastIndex),
-				'[[Enumerable]]': $isEnumerable$1(O, P),
-				'[[Value]]': O[P],
-				'[[Writable]]': true
-			};
-		}
-		return ToPropertyDescriptor(getOwnPropertyDescriptor(O, P));
+	var regexpStickyHelpers = {
+		UNSUPPORTED_Y: UNSUPPORTED_Y,
+		BROKEN_CARET: BROKEN_CARET
 	};
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isdatadescriptor
+	var nativeExec = RegExp.prototype.exec;
+	// This always refers to the native implementation, because the
+	// String#replace polyfill uses ./fix-regexp-well-known-symbol-logic.js,
+	// which loads this file before patching the method.
+	var nativeReplace = String.prototype.replace;
 
-	var IsDataDescriptor = function IsDataDescriptor(Desc) {
-		if (typeof Desc === 'undefined') {
-			return false;
-		}
+	var patchedExec = nativeExec;
 
-		assertRecord(Type$1, 'Property Descriptor', 'Desc', Desc);
+	var UPDATES_LAST_INDEX_WRONG = (function () {
+	  var re1 = /a/;
+	  var re2 = /b*/g;
+	  nativeExec.call(re1, 'a');
+	  nativeExec.call(re2, 'a');
+	  return re1.lastIndex !== 0 || re2.lastIndex !== 0;
+	})();
 
-		if (!src(Desc, '[[Value]]') && !src(Desc, '[[Writable]]')) {
-			return false;
-		}
+	var UNSUPPORTED_Y$1 = regexpStickyHelpers.UNSUPPORTED_Y || regexpStickyHelpers.BROKEN_CARET;
 
-		return true;
-	};
+	// nonparticipating capturing group, copied from es5-shim's String#split patch.
+	var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;
 
-	var $Object$1 = GetIntrinsic('%Object%');
+	var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y$1;
 
+	if (PATCH) {
+	  patchedExec = function exec(str) {
+	    var re = this;
+	    var lastIndex, reCopy, match, i;
+	    var sticky = UNSUPPORTED_Y$1 && re.sticky;
+	    var flags = regexpFlags.call(re);
+	    var source = re.source;
+	    var charsAdded = 0;
+	    var strCopy = str;
 
+	    if (sticky) {
+	      flags = flags.replace('y', '');
+	      if (flags.indexOf('g') === -1) {
+	        flags += 'g';
+	      }
 
-	var $preventExtensions = $Object$1.preventExtensions;
-	var $isExtensible = $Object$1.isExtensible;
+	      strCopy = String(str).slice(re.lastIndex);
+	      // Support anchored sticky behavior.
+	      if (re.lastIndex > 0 && (!re.multiline || re.multiline && str[re.lastIndex - 1] !== '\n')) {
+	        source = '(?: ' + source + ')';
+	        strCopy = ' ' + strCopy;
+	        charsAdded++;
+	      }
+	      // ^(? + rx + ) is needed, in combination with some str slicing, to
+	      // simulate the 'y' flag.
+	      reCopy = new RegExp('^(?:' + source + ')', flags);
+	    }
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isextensible-o
+	    if (NPCG_INCLUDED) {
+	      reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
+	    }
+	    if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;
 
-	var IsExtensible = $preventExtensions
-		? function IsExtensible(obj) {
-			return !isPrimitive(obj) && $isExtensible(obj);
-		}
-		: function IsExtensible(obj) {
-			return !isPrimitive(obj);
-		};
+	    match = nativeExec.call(sticky ? reCopy : re, strCopy);
 
-	// http://www.ecma-international.org/ecma-262/5.1/#sec-9.12
+	    if (sticky) {
+	      if (match) {
+	        match.input = match.input.slice(charsAdded);
+	        match[0] = match[0].slice(charsAdded);
+	        match.index = re.lastIndex;
+	        re.lastIndex += match[0].length;
+	      } else re.lastIndex = 0;
+	    } else if (UPDATES_LAST_INDEX_WRONG && match) {
+	      re.lastIndex = re.global ? match.index + match[0].length : lastIndex;
+	    }
+	    if (NPCG_INCLUDED && match && match.length > 1) {
+	      // Fix browsers whose `exec` methods don't consistently return `undefined`
+	      // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/
+	      nativeReplace.call(match[0], reCopy, function () {
+	        for (i = 1; i < arguments.length - 2; i++) {
+	          if (arguments[i] === undefined) match[i] = undefined;
+	        }
+	      });
+	    }
 
-	var SameValue = function SameValue(x, y) {
-		if (x === y) { // 0 === -0, but they are not identical.
-			if (x === 0) { return 1 / x === 1 / y; }
-			return true;
-		}
-		return _isNaN(x) && _isNaN(y);
-	};
+	    return match;
+	  };
+	}
 
-	var $TypeError$6 = GetIntrinsic('%TypeError%');
+	var regexpExec = patchedExec;
 
+	_export({ target: 'RegExp', proto: true, forced: /./.exec !== regexpExec }, {
+	  exec: regexpExec
+	});
 
+	var TO_STRING$1 = 'toString';
+	var RegExpPrototype = RegExp.prototype;
+	var nativeToString = RegExpPrototype[TO_STRING$1];
+
+	var NOT_GENERIC = fails(function () { return nativeToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
+	// FF44- RegExp#toString has a wrong name
+	var INCORRECT_NAME = nativeToString.name != TO_STRING$1;
+
+	// `RegExp.prototype.toString` method
+	// https://tc39.github.io/ecma262/#sec-regexp.prototype.tostring
+	if (NOT_GENERIC || INCORRECT_NAME) {
+	  redefine(RegExp.prototype, TO_STRING$1, function toString() {
+	    var R = anObject(this);
+	    var p = String(R.source);
+	    var rf = R.flags;
+	    var f = String(rf === undefined && R instanceof RegExp && !('flags' in RegExpPrototype) ? regexpFlags.call(R) : rf);
+	    return '/' + p + '/' + f;
+	  }, { unsafe: true });
+	}
+
+	// `String.prototype.{ codePointAt, at }` methods implementation
+	var createMethod$2 = function (CONVERT_TO_STRING) {
+	  return function ($this, pos) {
+	    var S = String(requireObjectCoercible($this));
+	    var position = toInteger(pos);
+	    var size = S.length;
+	    var first, second;
+	    if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;
+	    first = S.charCodeAt(position);
+	    return first < 0xD800 || first > 0xDBFF || position + 1 === size
+	      || (second = S.charCodeAt(position + 1)) < 0xDC00 || second > 0xDFFF
+	        ? CONVERT_TO_STRING ? S.charAt(position) : first
+	        : CONVERT_TO_STRING ? S.slice(position, position + 2) : (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;
+	  };
+	};
+
+	var stringMultibyte = {
+	  // `String.prototype.codePointAt` method
+	  // https://tc39.github.io/ecma262/#sec-string.prototype.codepointat
+	  codeAt: createMethod$2(false),
+	  // `String.prototype.at` method
+	  // https://github.com/mathiasbynens/String.prototype.at
+	  charAt: createMethod$2(true)
+	};
+
+	var charAt = stringMultibyte.charAt;
+
+
+
+	var STRING_ITERATOR = 'String Iterator';
+	var setInternalState$4 = internalState.set;
+	var getInternalState$4 = internalState.getterFor(STRING_ITERATOR);
+
+	// `String.prototype[@@iterator]` method
+	// https://tc39.github.io/ecma262/#sec-string.prototype-@@iterator
+	defineIterator(String, 'String', function (iterated) {
+	  setInternalState$4(this, {
+	    type: STRING_ITERATOR,
+	    string: String(iterated),
+	    index: 0
+	  });
+	// `%StringIteratorPrototype%.next` method
+	// https://tc39.github.io/ecma262/#sec-%stringiteratorprototype%.next
+	}, function next() {
+	  var state = getInternalState$4(this);
+	  var string = state.string;
+	  var index = state.index;
+	  var point;
+	  if (index >= string.length) return { value: undefined, done: true };
+	  point = charAt(string, index);
+	  state.index += point.length;
+	  return { value: point, done: false };
+	});
 
+	// TODO: Remove from `core-js@4` since it's moved to entry points
 
 
 
@@ -3225,1803 +3136,3295 @@
 
 
 
+	var SPECIES$6 = wellKnownSymbol('species');
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-createdataproperty
+	var REPLACE_SUPPORTS_NAMED_GROUPS = !fails(function () {
+	  // #replace needs built-in support for named groups.
+	  // #match works fine because it just return the exec results, even if it has
+	  // a "grops" property.
+	  var re = /./;
+	  re.exec = function () {
+	    var result = [];
+	    result.groups = { a: '7' };
+	    return result;
+	  };
+	  return ''.replace(re, '$<a>') !== '7';
+	});
 
-	var CreateDataProperty = function CreateDataProperty(O, P, V) {
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$6('Assertion failed: Type(O) is not Object');
-		}
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$6('Assertion failed: IsPropertyKey(P) is not true');
-		}
-		var oldDesc = OrdinaryGetOwnProperty(O, P);
-		var extensible = !oldDesc || IsExtensible(O);
-		var immutable = oldDesc && (!oldDesc['[[Writable]]'] || !oldDesc['[[Configurable]]']);
-		if (immutable || !extensible) {
-			return false;
-		}
-		return DefineOwnProperty(
-			IsDataDescriptor,
-			SameValue,
-			FromPropertyDescriptor,
-			O,
-			P,
-			{
-				'[[Configurable]]': true,
-				'[[Enumerable]]': true,
-				'[[Value]]': V,
-				'[[Writable]]': true
-			}
-		);
-	};
+	// IE <= 11 replaces $0 with the whole match, as if it was $&
+	// https://stackoverflow.com/questions/6024666/getting-ie-to-replace-a-regex-with-the-literal-string-0
+	var REPLACE_KEEPS_$0 = (function () {
+	  return 'a'.replace(/./, '$0') === '$0';
+	})();
 
-	var $TypeError$7 = GetIntrinsic('%TypeError%');
+	var REPLACE = wellKnownSymbol('replace');
+	// Safari <= 13.0.3(?) substitutes nth capture where n>m with an empty string
+	var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = (function () {
+	  if (/./[REPLACE]) {
+	    return /./[REPLACE]('a', '$0') === '';
+	  }
+	  return false;
+	})();
 
+	// Chrome 51 has a buggy "split" implementation when RegExp#exec !== nativeExec
+	// Weex JS has frozen built-in prototypes, so use try / catch wrapper
+	var SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails(function () {
+	  var re = /(?:)/;
+	  var originalExec = re.exec;
+	  re.exec = function () { return originalExec.apply(this, arguments); };
+	  var result = 'ab'.split(re);
+	  return result.length !== 2 || result[0] !== 'a' || result[1] !== 'b';
+	});
 
+	var fixRegexpWellKnownSymbolLogic = function (KEY, length, exec, sham) {
+	  var SYMBOL = wellKnownSymbol(KEY);
 
+	  var DELEGATES_TO_SYMBOL = !fails(function () {
+	    // String methods call symbol-named RegEp methods
+	    var O = {};
+	    O[SYMBOL] = function () { return 7; };
+	    return ''[KEY](O) != 7;
+	  });
 
+	  var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails(function () {
+	    // Symbol-named RegExp methods call .exec
+	    var execCalled = false;
+	    var re = /a/;
 
-	// // https://ecma-international.org/ecma-262/6.0/#sec-createdatapropertyorthrow
+	    if (KEY === 'split') {
+	      // We can't use real regex here since it causes deoptimization
+	      // and serious performance degradation in V8
+	      // https://github.com/zloirock/core-js/issues/306
+	      re = {};
+	      // RegExp[@@split] doesn't call the regex's exec method, but first creates
+	      // a new one. We need to return the patched regex when creating the new one.
+	      re.constructor = {};
+	      re.constructor[SPECIES$6] = function () { return re; };
+	      re.flags = '';
+	      re[SYMBOL] = /./[SYMBOL];
+	    }
 
-	var CreateDataPropertyOrThrow = function CreateDataPropertyOrThrow(O, P, V) {
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$7('Assertion failed: Type(O) is not Object');
-		}
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$7('Assertion failed: IsPropertyKey(P) is not true');
-		}
-		var success = CreateDataProperty(O, P, V);
-		if (!success) {
-			throw new $TypeError$7('unable to create data property');
-		}
-		return success;
-	};
+	    re.exec = function () { execCalled = true; return null; };
 
-	var hasMap = typeof Map === 'function' && Map.prototype;
-	var mapSizeDescriptor = Object.getOwnPropertyDescriptor && hasMap ? Object.getOwnPropertyDescriptor(Map.prototype, 'size') : null;
-	var mapSize = hasMap && mapSizeDescriptor && typeof mapSizeDescriptor.get === 'function' ? mapSizeDescriptor.get : null;
-	var mapForEach = hasMap && Map.prototype.forEach;
-	var hasSet = typeof Set === 'function' && Set.prototype;
-	var setSizeDescriptor = Object.getOwnPropertyDescriptor && hasSet ? Object.getOwnPropertyDescriptor(Set.prototype, 'size') : null;
-	var setSize = hasSet && setSizeDescriptor && typeof setSizeDescriptor.get === 'function' ? setSizeDescriptor.get : null;
-	var setForEach = hasSet && Set.prototype.forEach;
-	var booleanValueOf = Boolean.prototype.valueOf;
-	var objectToString$1 = Object.prototype.toString;
+	    re[SYMBOL]('');
+	    return !execCalled;
+	  });
 
-	var objectInspect = function inspect_ (obj, opts, depth, seen) {
-	    if (typeof obj === 'undefined') {
-	        return 'undefined';
-	    }
-	    if (obj === null) {
-	        return 'null';
-	    }
-	    if (typeof obj === 'boolean') {
-	        return obj ? 'true' : 'false';
-	    }
-	    if (typeof obj === 'string') {
-	        return inspectString(obj);
-	    }
-	    if (typeof obj === 'number') {
-	      if (obj === 0) {
-	        return Infinity / obj > 0 ? '0' : '-0';
+	  if (
+	    !DELEGATES_TO_SYMBOL ||
+	    !DELEGATES_TO_EXEC ||
+	    (KEY === 'replace' && !(
+	      REPLACE_SUPPORTS_NAMED_GROUPS &&
+	      REPLACE_KEEPS_$0 &&
+	      !REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE
+	    )) ||
+	    (KEY === 'split' && !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC)
+	  ) {
+	    var nativeRegExpMethod = /./[SYMBOL];
+	    var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {
+	      if (regexp.exec === regexpExec) {
+	        if (DELEGATES_TO_SYMBOL && !forceStringMethod) {
+	          // The native String method already delegates to @@method (this
+	          // polyfilled function), leasing to infinite recursion.
+	          // We avoid it by directly calling the native @@method method.
+	          return { done: true, value: nativeRegExpMethod.call(regexp, str, arg2) };
+	        }
+	        return { done: true, value: nativeMethod.call(str, regexp, arg2) };
 	      }
-	      return String(obj);
-	    }
+	      return { done: false };
+	    }, {
+	      REPLACE_KEEPS_$0: REPLACE_KEEPS_$0,
+	      REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE: REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE
+	    });
+	    var stringMethod = methods[0];
+	    var regexMethod = methods[1];
+
+	    redefine(String.prototype, KEY, stringMethod);
+	    redefine(RegExp.prototype, SYMBOL, length == 2
+	      // 21.2.5.8 RegExp.prototype[@@replace](string, replaceValue)
+	      // 21.2.5.11 RegExp.prototype[@@split](string, limit)
+	      ? function (string, arg) { return regexMethod.call(string, this, arg); }
+	      // 21.2.5.6 RegExp.prototype[@@match](string)
+	      // 21.2.5.9 RegExp.prototype[@@search](string)
+	      : function (string) { return regexMethod.call(string, this); }
+	    );
+	  }
 
-	    if (!opts) { opts = {}; }
+	  if (sham) createNonEnumerableProperty(RegExp.prototype[SYMBOL], 'sham', true);
+	};
 
-	    var maxDepth = typeof opts.depth === 'undefined' ? 5 : opts.depth;
-	    if (typeof depth === 'undefined') { depth = 0; }
-	    if (depth >= maxDepth && maxDepth > 0 && typeof obj === 'object') {
-	        return '[Object]';
-	    }
+	var charAt$1 = stringMultibyte.charAt;
 
-	    if (typeof seen === 'undefined') { seen = []; }
-	    else if (indexOf$2(seen, obj) >= 0) {
-	        return '[Circular]';
-	    }
+	// `AdvanceStringIndex` abstract operation
+	// https://tc39.github.io/ecma262/#sec-advancestringindex
+	var advanceStringIndex = function (S, index, unicode) {
+	  return index + (unicode ? charAt$1(S, index).length : 1);
+	};
 
-	    function inspect (value, from) {
-	        if (from) {
-	            seen = seen.slice();
-	            seen.push(from);
-	        }
-	        return inspect_(value, opts, depth + 1, seen);
+	// `RegExpExec` abstract operation
+	// https://tc39.github.io/ecma262/#sec-regexpexec
+	var regexpExecAbstract = function (R, S) {
+	  var exec = R.exec;
+	  if (typeof exec === 'function') {
+	    var result = exec.call(R, S);
+	    if (typeof result !== 'object') {
+	      throw TypeError('RegExp exec method returned something other than an Object or null');
 	    }
+	    return result;
+	  }
 
-	    if (typeof obj === 'function') {
-	        var name = nameOf(obj);
-	        return '[Function' + (name ? ': ' + name : '') + ']';
-	    }
-	    if (isSymbol$3(obj)) {
-	        var symString = Symbol.prototype.toString.call(obj);
-	        return typeof obj === 'object' ? markBoxed(symString) : symString;
-	    }
-	    if (isElement(obj)) {
-	        var s = '<' + String(obj.nodeName).toLowerCase();
-	        var attrs = obj.attributes || [];
-	        for (var i = 0; i < attrs.length; i++) {
-	            s += ' ' + attrs[i].name + '="' + quote(attrs[i].value) + '"';
-	        }
-	        s += '>';
-	        if (obj.childNodes && obj.childNodes.length) { s += '...'; }
-	        s += '</' + String(obj.nodeName).toLowerCase() + '>';
-	        return s;
-	    }
-	    if (isArray$3(obj)) {
-	        if (obj.length === 0) { return '[]'; }
-	        return '[ ' + arrObjKeys(obj, inspect).join(', ') + ' ]';
-	    }
-	    if (isError(obj)) {
-	        var parts = arrObjKeys(obj, inspect);
-	        if (parts.length === 0) { return '[' + String(obj) + ']'; }
-	        return '{ [' + String(obj) + '] ' + parts.join(', ') + ' }';
-	    }
-	    if (typeof obj === 'object' && typeof obj.inspect === 'function') {
-	        return obj.inspect();
-	    }
-	    if (isMap(obj)) {
-	        var parts = [];
-	        mapForEach.call(obj, function (value, key) {
-	            parts.push(inspect(key, obj) + ' => ' + inspect(value, obj));
-	        });
-	        return collectionOf('Map', mapSize.call(obj), parts);
-	    }
-	    if (isSet(obj)) {
-	        var parts = [];
-	        setForEach.call(obj, function (value ) {
-	            parts.push(inspect(value, obj));
-	        });
-	        return collectionOf('Set', setSize.call(obj), parts);
-	    }
-	    if (isNumber(obj)) {
-	        return markBoxed(Number(obj));
-	    }
-	    if (isBoolean(obj)) {
-	        return markBoxed(booleanValueOf.call(obj));
-	    }
-	    if (isString$1(obj)) {
-	        return markBoxed(inspect(String(obj)));
-	    }
-	    if (!isDate(obj) && !isRegExp(obj)) {
-	        var xs = arrObjKeys(obj, inspect);
-	        if (xs.length === 0) { return '{}'; }
-	        return '{ ' + xs.join(', ') + ' }';
-	    }
-	    return String(obj);
-	};
+	  if (classofRaw(R) !== 'RegExp') {
+	    throw TypeError('RegExp#exec called on incompatible receiver');
+	  }
 
-	function quote (s) {
-	    return String(s).replace(/"/g, '&quot;');
-	}
+	  return regexpExec.call(R, S);
+	};
 
-	function isArray$3 (obj) { return toStr$8(obj) === '[object Array]' }
-	function isDate (obj) { return toStr$8(obj) === '[object Date]' }
-	function isRegExp (obj) { return toStr$8(obj) === '[object RegExp]' }
-	function isError (obj) { return toStr$8(obj) === '[object Error]' }
-	function isSymbol$3 (obj) { return toStr$8(obj) === '[object Symbol]' }
-	function isString$1 (obj) { return toStr$8(obj) === '[object String]' }
-	function isNumber (obj) { return toStr$8(obj) === '[object Number]' }
-	function isBoolean (obj) { return toStr$8(obj) === '[object Boolean]' }
+	var max$2 = Math.max;
+	var min$2 = Math.min;
+	var floor$2 = Math.floor;
+	var SUBSTITUTION_SYMBOLS = /\$([$&'`]|\d\d?|<[^>]*>)/g;
+	var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&'`]|\d\d?)/g;
 
-	var hasOwn = Object.prototype.hasOwnProperty || function (key) { return key in this; };
-	function has$1 (obj, key) {
-	    return hasOwn.call(obj, key);
-	}
+	var maybeToString = function (it) {
+	  return it === undefined ? it : String(it);
+	};
 
-	function toStr$8 (obj) {
-	    return objectToString$1.call(obj);
-	}
+	// @@replace logic
+	fixRegexpWellKnownSymbolLogic('replace', 2, function (REPLACE, nativeReplace, maybeCallNative, reason) {
+	  var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = reason.REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE;
+	  var REPLACE_KEEPS_$0 = reason.REPLACE_KEEPS_$0;
+	  var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';
 
-	function nameOf (f) {
-	    if (f.name) { return f.name; }
-	    var m = String(f).match(/^function\s*([\w$]+)/);
-	    if (m) { return m[1]; }
-	}
+	  return [
+	    // `String.prototype.replace` method
+	    // https://tc39.github.io/ecma262/#sec-string.prototype.replace
+	    function replace(searchValue, replaceValue) {
+	      var O = requireObjectCoercible(this);
+	      var replacer = searchValue == undefined ? undefined : searchValue[REPLACE];
+	      return replacer !== undefined
+	        ? replacer.call(searchValue, O, replaceValue)
+	        : nativeReplace.call(String(O), searchValue, replaceValue);
+	    },
+	    // `RegExp.prototype[@@replace]` method
+	    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@replace
+	    function (regexp, replaceValue) {
+	      if (
+	        (!REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE && REPLACE_KEEPS_$0) ||
+	        (typeof replaceValue === 'string' && replaceValue.indexOf(UNSAFE_SUBSTITUTE) === -1)
+	      ) {
+	        var res = maybeCallNative(nativeReplace, regexp, this, replaceValue);
+	        if (res.done) return res.value;
+	      }
 
-	function indexOf$2 (xs, x) {
-	    if (xs.indexOf) { return xs.indexOf(x); }
-	    for (var i = 0, l = xs.length; i < l; i++) {
-	        if (xs[i] === x) { return i; }
-	    }
-	    return -1;
-	}
+	      var rx = anObject(regexp);
+	      var S = String(this);
 
-	function isMap (x) {
-	    if (!mapSize) {
-	        return false;
-	    }
-	    try {
-	        mapSize.call(x);
-	        try {
-	            setSize.call(x);
-	        } catch (s) {
-	            return true;
-	        }
-	        return x instanceof Map; // core-js workaround, pre-v2.5.0
-	    } catch (e) {}
-	    return false;
-	}
+	      var functionalReplace = typeof replaceValue === 'function';
+	      if (!functionalReplace) replaceValue = String(replaceValue);
 
-	function isSet (x) {
-	    if (!setSize) {
-	        return false;
-	    }
-	    try {
-	        setSize.call(x);
-	        try {
-	            mapSize.call(x);
-	        } catch (m) {
-	            return true;
-	        }
-	        return x instanceof Set; // core-js workaround, pre-v2.5.0
-	    } catch (e) {}
-	    return false;
-	}
+	      var global = rx.global;
+	      if (global) {
+	        var fullUnicode = rx.unicode;
+	        rx.lastIndex = 0;
+	      }
+	      var results = [];
+	      while (true) {
+	        var result = regexpExecAbstract(rx, S);
+	        if (result === null) break;
 
-	function isElement (x) {
-	    if (!x || typeof x !== 'object') { return false; }
-	    if (typeof HTMLElement !== 'undefined' && x instanceof HTMLElement) {
-	        return true;
-	    }
-	    return typeof x.nodeName === 'string'
-	        && typeof x.getAttribute === 'function'
-	    ;
-	}
+	        results.push(result);
+	        if (!global) break;
 
-	function inspectString (str) {
-	    var s = str.replace(/(['\\])/g, '\\$1').replace(/[\x00-\x1f]/g, lowbyte);
-	    return "'" + s + "'";
-	}
+	        var matchStr = String(result[0]);
+	        if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);
+	      }
 
-	function lowbyte (c) {
-	    var n = c.charCodeAt(0);
-	    var x = { 8: 'b', 9: 't', 10: 'n', 12: 'f', 13: 'r' }[n];
-	    if (x) { return '\\' + x; }
-	    return '\\x' + (n < 0x10 ? '0' : '') + n.toString(16);
-	}
+	      var accumulatedResult = '';
+	      var nextSourcePosition = 0;
+	      for (var i = 0; i < results.length; i++) {
+	        result = results[i];
+
+	        var matched = String(result[0]);
+	        var position = max$2(min$2(toInteger(result.index), S.length), 0);
+	        var captures = [];
+	        // NOTE: This is equivalent to
+	        //   captures = result.slice(1).map(maybeToString)
+	        // but for some reason `nativeSlice.call(result, 1, result.length)` (called in
+	        // the slice polyfill when slicing native arrays) "doesn't work" in safari 9 and
+	        // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.
+	        for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));
+	        var namedCaptures = result.groups;
+	        if (functionalReplace) {
+	          var replacerArgs = [matched].concat(captures, position, S);
+	          if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);
+	          var replacement = String(replaceValue.apply(undefined, replacerArgs));
+	        } else {
+	          replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);
+	        }
+	        if (position >= nextSourcePosition) {
+	          accumulatedResult += S.slice(nextSourcePosition, position) + replacement;
+	          nextSourcePosition = position + matched.length;
+	        }
+	      }
+	      return accumulatedResult + S.slice(nextSourcePosition);
+	    }
+	  ];
 
-	function markBoxed (str) {
-	    return 'Object(' + str + ')';
-	}
+	  // https://tc39.github.io/ecma262/#sec-getsubstitution
+	  function getSubstitution(matched, str, position, captures, namedCaptures, replacement) {
+	    var tailPos = position + matched.length;
+	    var m = captures.length;
+	    var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;
+	    if (namedCaptures !== undefined) {
+	      namedCaptures = toObject(namedCaptures);
+	      symbols = SUBSTITUTION_SYMBOLS;
+	    }
+	    return nativeReplace.call(replacement, symbols, function (match, ch) {
+	      var capture;
+	      switch (ch.charAt(0)) {
+	        case '$': return '$';
+	        case '&': return matched;
+	        case '`': return str.slice(0, position);
+	        case "'": return str.slice(tailPos);
+	        case '<':
+	          capture = namedCaptures[ch.slice(1, -1)];
+	          break;
+	        default: // \d\d?
+	          var n = +ch;
+	          if (n === 0) return match;
+	          if (n > m) {
+	            var f = floor$2(n / 10);
+	            if (f === 0) return match;
+	            if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);
+	            return match;
+	          }
+	          capture = captures[n - 1];
+	      }
+	      return capture === undefined ? '' : capture;
+	    });
+	  }
+	});
 
-	function collectionOf (type, size, entries) {
-	    return type + ' (' + size + ') {' + entries.join(', ') + '}';
-	}
+	var MATCH = wellKnownSymbol('match');
+
+	// `IsRegExp` abstract operation
+	// https://tc39.github.io/ecma262/#sec-isregexp
+	var isRegexp = function (it) {
+	  var isRegExp;
+	  return isObject(it) && ((isRegExp = it[MATCH]) !== undefined ? !!isRegExp : classofRaw(it) == 'RegExp');
+	};
+
+	var arrayPush = [].push;
+	var min$3 = Math.min;
+	var MAX_UINT32 = 0xFFFFFFFF;
+
+	// babel-minify transpiles RegExp('x', 'y') -> /x/y and it causes SyntaxError
+	var SUPPORTS_Y = !fails(function () { return !RegExp(MAX_UINT32, 'y'); });
+
+	// @@split logic
+	fixRegexpWellKnownSymbolLogic('split', 2, function (SPLIT, nativeSplit, maybeCallNative) {
+	  var internalSplit;
+	  if (
+	    'abbc'.split(/(b)*/)[1] == 'c' ||
+	    'test'.split(/(?:)/, -1).length != 4 ||
+	    'ab'.split(/(?:ab)*/).length != 2 ||
+	    '.'.split(/(.?)(.?)/).length != 4 ||
+	    '.'.split(/()()/).length > 1 ||
+	    ''.split(/.?/).length
+	  ) {
+	    // based on es5-shim implementation, need to rework it
+	    internalSplit = function (separator, limit) {
+	      var string = String(requireObjectCoercible(this));
+	      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
+	      if (lim === 0) return [];
+	      if (separator === undefined) return [string];
+	      // If `separator` is not a regex, use native split
+	      if (!isRegexp(separator)) {
+	        return nativeSplit.call(string, separator, lim);
+	      }
+	      var output = [];
+	      var flags = (separator.ignoreCase ? 'i' : '') +
+	                  (separator.multiline ? 'm' : '') +
+	                  (separator.unicode ? 'u' : '') +
+	                  (separator.sticky ? 'y' : '');
+	      var lastLastIndex = 0;
+	      // Make `global` and avoid `lastIndex` issues by working with a copy
+	      var separatorCopy = new RegExp(separator.source, flags + 'g');
+	      var match, lastIndex, lastLength;
+	      while (match = regexpExec.call(separatorCopy, string)) {
+	        lastIndex = separatorCopy.lastIndex;
+	        if (lastIndex > lastLastIndex) {
+	          output.push(string.slice(lastLastIndex, match.index));
+	          if (match.length > 1 && match.index < string.length) arrayPush.apply(output, match.slice(1));
+	          lastLength = match[0].length;
+	          lastLastIndex = lastIndex;
+	          if (output.length >= lim) break;
+	        }
+	        if (separatorCopy.lastIndex === match.index) separatorCopy.lastIndex++; // Avoid an infinite loop
+	      }
+	      if (lastLastIndex === string.length) {
+	        if (lastLength || !separatorCopy.test('')) output.push('');
+	      } else output.push(string.slice(lastLastIndex));
+	      return output.length > lim ? output.slice(0, lim) : output;
+	    };
+	  // Chakra, V8
+	  } else if ('0'.split(undefined, 0).length) {
+	    internalSplit = function (separator, limit) {
+	      return separator === undefined && limit === 0 ? [] : nativeSplit.call(this, separator, limit);
+	    };
+	  } else internalSplit = nativeSplit;
 
-	function arrObjKeys (obj, inspect) {
-	    var isArr = isArray$3(obj);
-	    var xs = [];
-	    if (isArr) {
-	        xs.length = obj.length;
-	        for (var i = 0; i < obj.length; i++) {
-	            xs[i] = has$1(obj, i) ? inspect(obj[i], obj) : '';
-	        }
-	    }
-	    for (var key in obj) {
-	        if (!has$1(obj, key)) { continue; }
-	        if (isArr && String(Number(key)) === key && key < obj.length) { continue; }
-	        if (/[^\w$]/.test(key)) {
-	            xs.push(inspect(key, obj) + ': ' + inspect(obj[key], obj));
+	  return [
+	    // `String.prototype.split` method
+	    // https://tc39.github.io/ecma262/#sec-string.prototype.split
+	    function split(separator, limit) {
+	      var O = requireObjectCoercible(this);
+	      var splitter = separator == undefined ? undefined : separator[SPLIT];
+	      return splitter !== undefined
+	        ? splitter.call(separator, O, limit)
+	        : internalSplit.call(String(O), separator, limit);
+	    },
+	    // `RegExp.prototype[@@split]` method
+	    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@split
+	    //
+	    // NOTE: This cannot be properly polyfilled in engines that don't support
+	    // the 'y' flag.
+	    function (regexp, limit) {
+	      var res = maybeCallNative(internalSplit, regexp, this, limit, internalSplit !== nativeSplit);
+	      if (res.done) return res.value;
+
+	      var rx = anObject(regexp);
+	      var S = String(this);
+	      var C = speciesConstructor(rx, RegExp);
+
+	      var unicodeMatching = rx.unicode;
+	      var flags = (rx.ignoreCase ? 'i' : '') +
+	                  (rx.multiline ? 'm' : '') +
+	                  (rx.unicode ? 'u' : '') +
+	                  (SUPPORTS_Y ? 'y' : 'g');
+
+	      // ^(? + rx + ) is needed, in combination with some S slicing, to
+	      // simulate the 'y' flag.
+	      var splitter = new C(SUPPORTS_Y ? rx : '^(?:' + rx.source + ')', flags);
+	      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
+	      if (lim === 0) return [];
+	      if (S.length === 0) return regexpExecAbstract(splitter, S) === null ? [S] : [];
+	      var p = 0;
+	      var q = 0;
+	      var A = [];
+	      while (q < S.length) {
+	        splitter.lastIndex = SUPPORTS_Y ? q : 0;
+	        var z = regexpExecAbstract(splitter, SUPPORTS_Y ? S : S.slice(q));
+	        var e;
+	        if (
+	          z === null ||
+	          (e = min$3(toLength(splitter.lastIndex + (SUPPORTS_Y ? 0 : q)), S.length)) === p
+	        ) {
+	          q = advanceStringIndex(S, q, unicodeMatching);
 	        } else {
-	            xs.push(key + ': ' + inspect(obj[key], obj));
+	          A.push(S.slice(p, q));
+	          if (A.length === lim) return A;
+	          for (var i = 1; i <= z.length - 1; i++) {
+	            A.push(z[i]);
+	            if (A.length === lim) return A;
+	          }
+	          q = p = e;
 	        }
+	      }
+	      A.push(S.slice(p));
+	      return A;
 	    }
-	    return xs;
-	}
-
-	var $TypeError$8 = GetIntrinsic('%TypeError%');
-
+	  ];
+	}, !SUPPORTS_Y);
 
+	// a string of all valid unicode whitespaces
+	// eslint-disable-next-line max-len
+	var whitespaces = '\u0009\u000A\u000B\u000C\u000D\u0020\u00A0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';
 
+	var whitespace = '[' + whitespaces + ']';
+	var ltrim = RegExp('^' + whitespace + whitespace + '*');
+	var rtrim = RegExp(whitespace + whitespace + '*$');
 
+	// `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation
+	var createMethod$3 = function (TYPE) {
+	  return function ($this) {
+	    var string = String(requireObjectCoercible($this));
+	    if (TYPE & 1) string = string.replace(ltrim, '');
+	    if (TYPE & 2) string = string.replace(rtrim, '');
+	    return string;
+	  };
+	};
 
+	var stringTrim = {
+	  // `String.prototype.{ trimLeft, trimStart }` methods
+	  // https://tc39.github.io/ecma262/#sec-string.prototype.trimstart
+	  start: createMethod$3(1),
+	  // `String.prototype.{ trimRight, trimEnd }` methods
+	  // https://tc39.github.io/ecma262/#sec-string.prototype.trimend
+	  end: createMethod$3(2),
+	  // `String.prototype.trim` method
+	  // https://tc39.github.io/ecma262/#sec-string.prototype.trim
+	  trim: createMethod$3(3)
+	};
 
-	/**
-	 * 7.3.1 Get (O, P) - https://ecma-international.org/ecma-262/6.0/#sec-get-o-p
-	 * 1. Assert: Type(O) is Object.
-	 * 2. Assert: IsPropertyKey(P) is true.
-	 * 3. Return O.[[Get]](P, O).
-	 */
+	var non = '\u200B\u0085\u180E';
 
-	var Get = function Get(O, P) {
-		// 7.3.1.1
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$8('Assertion failed: Type(O) is not Object');
-		}
-		// 7.3.1.2
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$8('Assertion failed: IsPropertyKey(P) is not true, got ' + objectInspect(P));
-		}
-		// 7.3.1.3
-		return O[P];
+	// check that a method works with the correct list
+	// of whitespaces and has a correct name
+	var stringTrimForced = function (METHOD_NAME) {
+	  return fails(function () {
+	    return !!whitespaces[METHOD_NAME]() || non[METHOD_NAME]() != non || whitespaces[METHOD_NAME].name !== METHOD_NAME;
+	  });
 	};
 
-	var $TypeError$9 = GetIntrinsic('%TypeError%');
-
-	var isPropertyDescriptor = function IsPropertyDescriptor(ES, Desc) {
-		if (ES.Type(Desc) !== 'Object') {
-			return false;
-		}
-		var allowed = {
-			'[[Configurable]]': true,
-			'[[Enumerable]]': true,
-			'[[Get]]': true,
-			'[[Set]]': true,
-			'[[Value]]': true,
-			'[[Writable]]': true
-		};
-
-		for (var key in Desc) { // eslint-disable-line no-restricted-syntax
-			if (src(Desc, key) && !allowed[key]) {
-				return false;
-			}
-		}
+	var $trim = stringTrim.trim;
 
-		if (ES.IsDataDescriptor(Desc) && ES.IsAccessorDescriptor(Desc)) {
-			throw new $TypeError$9('Property Descriptors may not be both accessor and data descriptors');
-		}
-		return true;
-	};
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isaccessordescriptor
+	// `String.prototype.trim` method
+	// https://tc39.github.io/ecma262/#sec-string.prototype.trim
+	_export({ target: 'String', proto: true, forced: stringTrimForced('trim') }, {
+	  trim: function trim() {
+	    return $trim(this);
+	  }
+	});
+
+	/* eslint-disable no-new */
 
-	var IsAccessorDescriptor = function IsAccessorDescriptor(Desc) {
-		if (typeof Desc === 'undefined') {
-			return false;
-		}
 
-		assertRecord(Type$1, 'Property Descriptor', 'Desc', Desc);
 
-		if (!src(Desc, '[[Get]]') && !src(Desc, '[[Set]]')) {
-			return false;
-		}
+	var NATIVE_ARRAY_BUFFER_VIEWS$2 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
 
-		return true;
-	};
+	var ArrayBuffer$3 = global_1.ArrayBuffer;
+	var Int8Array$2 = global_1.Int8Array;
 
-	var $TypeError$a = GetIntrinsic('%TypeError%');
+	var typedArrayConstructorsRequireWrappers = !NATIVE_ARRAY_BUFFER_VIEWS$2 || !fails(function () {
+	  Int8Array$2(1);
+	}) || !fails(function () {
+	  new Int8Array$2(-1);
+	}) || !checkCorrectnessOfIteration(function (iterable) {
+	  new Int8Array$2();
+	  new Int8Array$2(null);
+	  new Int8Array$2(1.5);
+	  new Int8Array$2(iterable);
+	}, true) || fails(function () {
+	  // Safari (11+) bug - a reason why even Safari 13 should load a typed array polyfill
+	  return new Int8Array$2(new ArrayBuffer$3(2), 1, undefined).length !== 1;
+	});
 
+	var toPositiveInteger = function (it) {
+	  var result = toInteger(it);
+	  if (result < 0) throw RangeError("The argument can't be less than 0");
+	  return result;
+	};
 
+	var toOffset = function (it, BYTES) {
+	  var offset = toPositiveInteger(it);
+	  if (offset % BYTES) throw RangeError('Wrong offset');
+	  return offset;
+	};
 
+	var aTypedArrayConstructor$1 = arrayBufferViewCore.aTypedArrayConstructor;
 
+	var typedArrayFrom = function from(source /* , mapfn, thisArg */) {
+	  var O = toObject(source);
+	  var argumentsLength = arguments.length;
+	  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
+	  var mapping = mapfn !== undefined;
+	  var iteratorMethod = getIteratorMethod(O);
+	  var i, length, result, step, iterator, next;
+	  if (iteratorMethod != undefined && !isArrayIteratorMethod(iteratorMethod)) {
+	    iterator = iteratorMethod.call(O);
+	    next = iterator.next;
+	    O = [];
+	    while (!(step = next.call(iterator)).done) {
+	      O.push(step.value);
+	    }
+	  }
+	  if (mapping && argumentsLength > 2) {
+	    mapfn = functionBindContext(mapfn, arguments[2], 2);
+	  }
+	  length = toLength(O.length);
+	  result = new (aTypedArrayConstructor$1(this))(length);
+	  for (i = 0; length > i; i++) {
+	    result[i] = mapping ? mapfn(O[i], i) : O[i];
+	  }
+	  return result;
+	};
 
+	// makes subclassing work correct for wrapped built-ins
+	var inheritIfRequired = function ($this, dummy, Wrapper) {
+	  var NewTarget, NewTargetPrototype;
+	  if (
+	    // it can work only with native `setPrototypeOf`
+	    objectSetPrototypeOf &&
+	    // we haven't completely correct pre-ES6 way for getting `new.target`, so use this
+	    typeof (NewTarget = dummy.constructor) == 'function' &&
+	    NewTarget !== Wrapper &&
+	    isObject(NewTargetPrototype = NewTarget.prototype) &&
+	    NewTargetPrototype !== Wrapper.prototype
+	  ) objectSetPrototypeOf($this, NewTargetPrototype);
+	  return $this;
+	};
 
+	var typedArrayConstructor = createCommonjsModule(function (module) {
 
 
 
 
 
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-definepropertyorthrow
 
-	var DefinePropertyOrThrow = function DefinePropertyOrThrow(O, P, desc) {
-		if (Type$1(O) !== 'Object') {
-			throw new $TypeError$a('Assertion failed: Type(O) is not Object');
-		}
 
-		if (!IsPropertyKey(P)) {
-			throw new $TypeError$a('Assertion failed: IsPropertyKey(P) is not true');
-		}
 
-		var Desc = isPropertyDescriptor({
-			Type: Type$1,
-			IsDataDescriptor: IsDataDescriptor,
-			IsAccessorDescriptor: IsAccessorDescriptor
-		}, desc) ? desc : ToPropertyDescriptor(desc);
-		if (!isPropertyDescriptor({
-			Type: Type$1,
-			IsDataDescriptor: IsDataDescriptor,
-			IsAccessorDescriptor: IsAccessorDescriptor
-		}, Desc)) {
-			throw new $TypeError$a('Assertion failed: Desc is not a valid Property Descriptor');
-		}
 
-		return DefineOwnProperty(
-			IsDataDescriptor,
-			SameValue,
-			FromPropertyDescriptor,
-			O,
-			P,
-			Desc
-		);
-	};
 
-	var IsConstructor = createCommonjsModule(function (module) {
 
 
 
-	var $construct = GetIntrinsic('%Reflect.construct%', true);
 
-	var DefinePropertyOrThrow$1 = DefinePropertyOrThrow;
-	try {
-		DefinePropertyOrThrow$1({}, '', { '[[Get]]': function () {} });
-	} catch (e) {
-		// Accessor properties aren't supported
-		DefinePropertyOrThrow$1 = null;
-	}
-
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isconstructor
-
-	if (DefinePropertyOrThrow$1 && $construct) {
-		var isConstructorMarker = {};
-		var badArrayLike = {};
-		DefinePropertyOrThrow$1(badArrayLike, 'length', {
-			'[[Get]]': function () {
-				throw isConstructorMarker;
-			},
-			'[[Enumerable]]': true
-		});
-
-		module.exports = function IsConstructor(argument) {
-			try {
-				// `Reflect.construct` invokes `IsConstructor(target)` before `Get(args, 'length')`:
-				$construct(argument, badArrayLike);
-			} catch (err) {
-				return err === isConstructorMarker;
-			}
-		};
-	} else {
-		module.exports = function IsConstructor(argument) {
-			// unfortunately there's no way to truly check this without try/catch `new argument` in old environments
-			return typeof argument === 'function' && !!argument.prototype;
-		};
-	}
-	});
 
-	var $String = GetIntrinsic('%String%');
-	var $TypeError$b = GetIntrinsic('%TypeError%');
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-tostring
 
-	var ToString = function ToString(argument) {
-		if (typeof argument === 'symbol') {
-			throw new $TypeError$b('Cannot convert a Symbol value to a string');
-		}
-		return $String(argument);
-	};
+	var getOwnPropertyNames = objectGetOwnPropertyNames.f;
 
-	var hasToStringTag$3 = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-	var toStr$9 = Object.prototype.toString;
+	var forEach = arrayIteration.forEach;
 
-	var isStandardArguments = function isArguments(value) {
-		if (hasToStringTag$3 && value && typeof value === 'object' && Symbol.toStringTag in value) {
-			return false;
-		}
-		return toStr$9.call(value) === '[object Arguments]';
-	};
 
-	var isLegacyArguments = function isArguments(value) {
-		if (isStandardArguments(value)) {
-			return true;
-		}
-		return value !== null &&
-			typeof value === 'object' &&
-			typeof value.length === 'number' &&
-			value.length >= 0 &&
-			toStr$9.call(value) !== '[object Array]' &&
-			toStr$9.call(value.callee) === '[object Function]';
-	};
 
-	var supportsStandardArguments = (function () {
-		return isStandardArguments(arguments);
-	}());
 
-	isStandardArguments.isLegacyArguments = isLegacyArguments; // for tests
 
-	var isArguments$2 = supportsStandardArguments ? isStandardArguments : isLegacyArguments;
 
-	var toString = {}.toString;
+	var getInternalState = internalState.get;
+	var setInternalState = internalState.set;
+	var nativeDefineProperty = objectDefineProperty.f;
+	var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+	var round = Math.round;
+	var RangeError = global_1.RangeError;
+	var ArrayBuffer = arrayBuffer.ArrayBuffer;
+	var DataView = arrayBuffer.DataView;
+	var NATIVE_ARRAY_BUFFER_VIEWS = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
+	var TYPED_ARRAY_TAG = arrayBufferViewCore.TYPED_ARRAY_TAG;
+	var TypedArray = arrayBufferViewCore.TypedArray;
+	var TypedArrayPrototype = arrayBufferViewCore.TypedArrayPrototype;
+	var aTypedArrayConstructor = arrayBufferViewCore.aTypedArrayConstructor;
+	var isTypedArray = arrayBufferViewCore.isTypedArray;
+	var BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';
+	var WRONG_LENGTH = 'Wrong length';
 
-	var isarray = Array.isArray || function (arr) {
-	  return toString.call(arr) == '[object Array]';
+	var fromList = function (C, list) {
+	  var index = 0;
+	  var length = list.length;
+	  var result = new (aTypedArrayConstructor(C))(length);
+	  while (length > index) result[index] = list[index++];
+	  return result;
 	};
 
-	var strValue = String.prototype.valueOf;
-	var tryStringObject = function tryStringObject(value) {
-		try {
-			strValue.call(value);
-			return true;
-		} catch (e) {
-			return false;
-		}
-	};
-	var toStr$a = Object.prototype.toString;
-	var strClass = '[object String]';
-	var hasToStringTag$4 = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-
-	var isString$2 = function isString(value) {
-		if (typeof value === 'string') {
-			return true;
-		}
-		if (typeof value !== 'object') {
-			return false;
-		}
-		return hasToStringTag$4 ? tryStringObject(value) : toStr$a.call(value) === strClass;
+	var addGetter = function (it, key) {
+	  nativeDefineProperty(it, key, { get: function () {
+	    return getInternalState(this)[key];
+	  } });
 	};
 
-	var $Map = typeof Map === 'function' && Map.prototype ? Map : null;
-	var $Set = typeof Set === 'function' && Set.prototype ? Set : null;
-
-	var exported;
-
-	if (!$Map) {
-		// eslint-disable-next-line no-unused-vars
-		exported = function isMap(x) {
-			// `Map` is not present in this environment.
-			return false;
-		};
-	}
-
-	var $mapHas = $Map ? Map.prototype.has : null;
-	var $setHas = $Set ? Set.prototype.has : null;
-	if (!exported && !$mapHas) {
-		// eslint-disable-next-line no-unused-vars
-		exported = function isMap(x) {
-			// `Map` does not have a `has` method
-			return false;
-		};
-	}
-
-	var isMap$1 = exported || function isMap(x) {
-		if (!x || typeof x !== 'object') {
-			return false;
-		}
-		try {
-			$mapHas.call(x);
-			if ($setHas) {
-				try {
-					$setHas.call(x);
-				} catch (e) {
-					return true;
-				}
-			}
-			return x instanceof $Map; // core-js workaround, pre-v2.5.0
-		} catch (e$1) {}
-		return false;
+	var isArrayBuffer = function (it) {
+	  var klass;
+	  return it instanceof ArrayBuffer || (klass = classof(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
 	};
 
-	var $Map$1 = typeof Map === 'function' && Map.prototype ? Map : null;
-	var $Set$1 = typeof Set === 'function' && Set.prototype ? Set : null;
-
-	var exported$1;
-
-	if (!$Set$1) {
-		// eslint-disable-next-line no-unused-vars
-		exported$1 = function isSet(x) {
-			// `Set` is not present in this environment.
-			return false;
-		};
-	}
-
-	var $mapHas$1 = $Map$1 ? Map.prototype.has : null;
-	var $setHas$1 = $Set$1 ? Set.prototype.has : null;
-	if (!exported$1 && !$setHas$1) {
-		// eslint-disable-next-line no-unused-vars
-		exported$1 = function isSet(x) {
-			// `Set` does not have a `has` method
-			return false;
-		};
-	}
-
-	var isSet$1 = exported$1 || function isSet(x) {
-		if (!x || typeof x !== 'object') {
-			return false;
-		}
-		try {
-			$setHas$1.call(x);
-			if ($mapHas$1) {
-				try {
-					$mapHas$1.call(x);
-				} catch (e) {
-					return true;
-				}
-			}
-			return x instanceof $Set$1; // core-js workaround, pre-v2.5.0
-		} catch (e$1) {}
-		return false;
+	var isTypedArrayIndex = function (target, key) {
+	  return isTypedArray(target)
+	    && typeof key != 'symbol'
+	    && key in target
+	    && String(+key) == String(key);
 	};
 
-	var esGetIterator = createCommonjsModule(function (module) {
-
-	/* eslint global-require: 0 */
-	// the code is structured this way so that bundlers can
-	// alias out `has-symbols` to `() => true` or `() => false` if your target
-	// environments' Symbol capabilities are known, and then use
-	// dead code elimination on the rest of this module.
-	//
-	// Similarly, `isarray` can be aliased to `Array.isArray` if
-	// available in all target environments.
-
-
-
-	if (hasSymbols$1() || shams()) {
-		var $iterator = Symbol.iterator;
-		// Symbol is available natively or shammed
-		// natively:
-		//  - Chrome >= 38
-		//  - Edge 12-14?, Edge >= 15 for sure
-		//  - FF >= 36
-		//  - Safari >= 9
-		//  - node >= 0.12
-		module.exports = function getIterator(iterable) {
-			// alternatively, `iterable[$iterator]?.()`
-			if (iterable != null && typeof iterable[$iterator] !== 'undefined') {
-				return iterable[$iterator]();
-			}
-			if (isArguments$2(iterable)) {
-				// arguments objects lack Symbol.iterator
-				// - node 0.12
-				return Array.prototype[$iterator].call(iterable);
-			}
-		};
-	} else {
-		// Symbol is not available, native or shammed
-		var isArray = isarray;
-		var isString = isString$2;
-		var GetIntrinsic$1 = GetIntrinsic;
-		var $Map = GetIntrinsic$1('%Map%', true);
-		var $Set = GetIntrinsic$1('%Set%', true);
-		var callBound$1 = callBound;
-		var $arrayPush = callBound$1('Array.prototype.push');
-		var $charCodeAt = callBound$1('String.prototype.charCodeAt');
-		var $stringSlice = callBound$1('String.prototype.slice');
-
-		var advanceStringIndex = function advanceStringIndex(S, index) {
-			var length = S.length;
-			if ((index + 1) >= length) {
-				return index + 1;
-			}
+	var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
+	  return isTypedArrayIndex(target, key = toPrimitive(key, true))
+	    ? createPropertyDescriptor(2, target[key])
+	    : nativeGetOwnPropertyDescriptor(target, key);
+	};
 
-			var first = $charCodeAt(S, index);
-			if (first < 0xD800 || first > 0xDBFF) {
-				return index + 1;
-			}
+	var wrappedDefineProperty = function defineProperty(target, key, descriptor) {
+	  if (isTypedArrayIndex(target, key = toPrimitive(key, true))
+	    && isObject(descriptor)
+	    && has(descriptor, 'value')
+	    && !has(descriptor, 'get')
+	    && !has(descriptor, 'set')
+	    // TODO: add validation descriptor w/o calling accessors
+	    && !descriptor.configurable
+	    && (!has(descriptor, 'writable') || descriptor.writable)
+	    && (!has(descriptor, 'enumerable') || descriptor.enumerable)
+	  ) {
+	    target[key] = descriptor.value;
+	    return target;
+	  } return nativeDefineProperty(target, key, descriptor);
+	};
 
-			var second = $charCodeAt(S, index + 1);
-			if (second < 0xDC00 || second > 0xDFFF) {
-				return index + 1;
-			}
+	if (descriptors) {
+	  if (!NATIVE_ARRAY_BUFFER_VIEWS) {
+	    objectGetOwnPropertyDescriptor.f = wrappedGetOwnPropertyDescriptor;
+	    objectDefineProperty.f = wrappedDefineProperty;
+	    addGetter(TypedArrayPrototype, 'buffer');
+	    addGetter(TypedArrayPrototype, 'byteOffset');
+	    addGetter(TypedArrayPrototype, 'byteLength');
+	    addGetter(TypedArrayPrototype, 'length');
+	  }
 
-			return index + 2;
-		};
-
-		var getArrayIterator = function getArrayIterator(arraylike) {
-			var i = 0;
-			return {
-				next: function next() {
-					var done = i >= arraylike.length;
-					var value;
-					if (!done) {
-						value = arraylike[i];
-						i += 1;
-					}
-					return {
-						done: done,
-						value: value
-					};
-				}
-			};
-		};
-
-		var getNonCollectionIterator = function getNonCollectionIterator(iterable) {
-			if (isArray(iterable) || isArguments$2(iterable)) {
-				return getArrayIterator(iterable);
-			}
-			if (isString(iterable)) {
-				var i = 0;
-				return {
-					next: function next() {
-						var nextIndex = advanceStringIndex(iterable, i);
-						var value = $stringSlice(iterable, i, nextIndex);
-						i = nextIndex;
-						return {
-							done: nextIndex > iterable.length,
-							value: value
-						};
-					}
-				};
-			}
-		};
-
-		if (!$Map && !$Set) {
-			// the only language iterables are Array, String, arguments
-			// - Safari <= 6.0
-			// - Chrome < 38
-			// - node < 0.12
-			// - FF < 13
-			// - IE < 11
-			// - Edge < 11
-
-			module.exports = getNonCollectionIterator;
-		} else {
-			// either Map or Set are available, but Symbol is not
-			// - es6-shim on an ES5 browser
-			// - Safari 6.2 (maybe 6.1?)
-			// - FF v[13, 36)
-			// - IE 11
-			// - Edge 11
-			// - Safari v[6, 9)
-
-			var isMap = isMap$1;
-			var isSet = isSet$1;
-
-			// Firefox >= 27, IE 11, Safari 6.2 - 9, Edge 11, es6-shim in older envs, all have forEach
-			var $mapForEach = callBound$1('Map.prototype.forEach', true);
-			var $setForEach = callBound$1('Set.prototype.forEach', true);
-			if (typeof process === 'undefined' || !process.versions || !process.versions.node) { // "if is not node"
-
-				// Firefox 17 - 26 has `.iterator()`, whose iterator `.next()` either
-				// returns a value, or throws a StopIteration object. These browsers
-				// do not have any other mechanism for iteration.
-				var $mapIterator = callBound$1('Map.prototype.iterator', true);
-				var $setIterator = callBound$1('Set.prototype.iterator', true);
-				var getStopIterationIterator = function (iterator) {
-					var done = false;
-					return {
-						next: function next() {
-							try {
-								return {
-									done: done,
-									value: done ? undefined : iterator.next()
-								};
-							} catch (e) {
-								done = true;
-								return {
-									done: true,
-									value: undefined
-								};
-							}
-						}
-					};
-				};
-			}
-			// Firefox 27-35, and some older es6-shim versions, use a string "@@iterator" property
-			// this returns a proper iterator object, so we should use it instead of forEach.
-			// newer es6-shim versions use a string "_es6-shim iterator_" property.
-			var $mapAtAtIterator = callBound$1('Map.prototype.@@iterator', true) || callBound$1('Map.prototype._es6-shim iterator_', true);
-			var $setAtAtIterator = callBound$1('Set.prototype.@@iterator', true) || callBound$1('Set.prototype._es6-shim iterator_', true);
-
-			var getCollectionIterator = function getCollectionIterator(iterable) {
-				if (isMap(iterable)) {
-					if ($mapIterator) {
-						return getStopIterationIterator($mapIterator(iterable));
-					}
-					if ($mapAtAtIterator) {
-						return $mapAtAtIterator(iterable);
-					}
-					if ($mapForEach) {
-						var entries = [];
-						$mapForEach(iterable, function (v, k) {
-							$arrayPush(entries, [k, v]);
-						});
-						return getArrayIterator(entries);
-					}
-				}
-				if (isSet(iterable)) {
-					if ($setIterator) {
-						return getStopIterationIterator($setIterator(iterable));
-					}
-					if ($setAtAtIterator) {
-						return $setAtAtIterator(iterable);
-					}
-					if ($setForEach) {
-						var values = [];
-						$setForEach(iterable, function (v) {
-							$arrayPush(values, v);
-						});
-						return getArrayIterator(values);
-					}
-				}
-			};
-
-			module.exports = function getIterator(iterable) {
-				return getCollectionIterator(iterable) || getNonCollectionIterator(iterable);
-			};
-		}
-	}
-	});
+	  _export({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
+	    getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
+	    defineProperty: wrappedDefineProperty
+	  });
 
-	var $TypeError$c = TypeError;
-
-	// eslint-disable-next-line consistent-return
-	var iterateIterator = function iterateIterator(iterator) {
-		if (!iterator || typeof iterator.next !== 'function') {
-			throw new $TypeError$c('iterator must be an object with a `next` method');
-		}
-		if (arguments.length > 1) {
-			var callback = arguments[1];
-			if (typeof callback !== 'function') {
-				throw new $TypeError$c('`callback`, if provided, must be a function');
-			}
-		}
-		var values = callback || [];
-		var result;
-		while ((result = iterator.next()) && !result.done) {
-			if (callback) {
-				callback(result.value); // eslint-disable-line callback-return
-			} else {
-				values.push(result.value);
-			}
-		}
-		if (!callback) {
-			return values;
-		}
-	};
+	  module.exports = function (TYPE, wrapper, CLAMPED) {
+	    var BYTES = TYPE.match(/\d+$/)[0] / 8;
+	    var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';
+	    var GETTER = 'get' + TYPE;
+	    var SETTER = 'set' + TYPE;
+	    var NativeTypedArrayConstructor = global_1[CONSTRUCTOR_NAME];
+	    var TypedArrayConstructor = NativeTypedArrayConstructor;
+	    var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
+	    var exported = {};
 
-	var $TypeError$d = TypeError;
+	    var getter = function (that, index) {
+	      var data = getInternalState(that);
+	      return data.view[GETTER](index * BYTES + data.byteOffset, true);
+	    };
 
+	    var setter = function (that, index, value) {
+	      var data = getInternalState(that);
+	      if (CLAMPED) value = (value = round(value)) < 0 ? 0 : value > 0xFF ? 0xFF : value & 0xFF;
+	      data.view[SETTER](index * BYTES + data.byteOffset, value, true);
+	    };
 
-	var iterateValue = function iterateValue(iterable) {
-		var iterator = esGetIterator(iterable);
-		if (!iterator) {
-			throw new $TypeError$d('non-iterable value provided');
-		}
-		if (arguments.length > 1) {
-			return iterateIterator(iterator, arguments[1]);
-		}
-		return iterateIterator(iterator);
-	};
+	    var addElement = function (that, index) {
+	      nativeDefineProperty(that, index, {
+	        get: function () {
+	          return getter(this, index);
+	        },
+	        set: function (value) {
+	          return setter(this, index, value);
+	        },
+	        enumerable: true
+	      });
+	    };
 
-	var implementation$5 = function from(items) {
-		var C = this;
-		if (items === null || typeof items === 'undefined') {
-			throw new TypeError('`Array.from` requires an array-like object, not `null` or `undefined`');
-		}
-		var mapFn, T;
-		if (typeof arguments[1] !== 'undefined') {
-			mapFn = arguments[1];
-			if (!IsCallable(mapFn)) {
-				throw new TypeError('When provided, the second argument to `Array.from` must be a function');
-			}
-			if (arguments.length > 2) {
-				T = arguments[2];
-			}
-		}
-
-		var values;
-		try {
-			values = iterateValue(items);
-		} catch (e) {
-			values = items;
-		}
-
-		var arrayLike = ToObject(values);
-		var len = ToLength(arrayLike.length);
-		var A = IsConstructor(C) ? ToObject(new C(len)) : new Array(len);
-		var k = 0;
-		var kValue, mappedValue;
-
-		while (k < len) {
-			var Pk = ToString(k);
-			kValue = Get(arrayLike, Pk);
-			if (mapFn) {
-				mappedValue = typeof T === 'undefined' ? mapFn(kValue, k) : Call(mapFn, T, [kValue, k]);
-			} else {
-				mappedValue = kValue;
-			}
-			CreateDataPropertyOrThrow(A, Pk, mappedValue);
-			k += 1;
-		}
-		A.length = len;
-		return A;
-	};
+	    if (!NATIVE_ARRAY_BUFFER_VIEWS) {
+	      TypedArrayConstructor = wrapper(function (that, data, offset, $length) {
+	        anInstance(that, TypedArrayConstructor, CONSTRUCTOR_NAME);
+	        var index = 0;
+	        var byteOffset = 0;
+	        var buffer, byteLength, length;
+	        if (!isObject(data)) {
+	          length = toIndex(data);
+	          byteLength = length * BYTES;
+	          buffer = new ArrayBuffer(byteLength);
+	        } else if (isArrayBuffer(data)) {
+	          buffer = data;
+	          byteOffset = toOffset(offset, BYTES);
+	          var $len = data.byteLength;
+	          if ($length === undefined) {
+	            if ($len % BYTES) throw RangeError(WRONG_LENGTH);
+	            byteLength = $len - byteOffset;
+	            if (byteLength < 0) throw RangeError(WRONG_LENGTH);
+	          } else {
+	            byteLength = toLength($length) * BYTES;
+	            if (byteLength + byteOffset > $len) throw RangeError(WRONG_LENGTH);
+	          }
+	          length = byteLength / BYTES;
+	        } else if (isTypedArray(data)) {
+	          return fromList(TypedArrayConstructor, data);
+	        } else {
+	          return typedArrayFrom.call(TypedArrayConstructor, data);
+	        }
+	        setInternalState(that, {
+	          buffer: buffer,
+	          byteOffset: byteOffset,
+	          byteLength: byteLength,
+	          length: length,
+	          view: new DataView(buffer)
+	        });
+	        while (index < length) addElement(that, index++);
+	      });
 
-	var tryCall = function (fn) {
-		try {
-			return fn();
-		} catch (e) {
-			return false;
-		}
-	};
+	      if (objectSetPrototypeOf) objectSetPrototypeOf(TypedArrayConstructor, TypedArray);
+	      TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = objectCreate(TypedArrayPrototype);
+	    } else if (typedArrayConstructorsRequireWrappers) {
+	      TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {
+	        anInstance(dummy, TypedArrayConstructor, CONSTRUCTOR_NAME);
+	        return inheritIfRequired(function () {
+	          if (!isObject(data)) return new NativeTypedArrayConstructor(toIndex(data));
+	          if (isArrayBuffer(data)) return $length !== undefined
+	            ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES), $length)
+	            : typedArrayOffset !== undefined
+	              ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES))
+	              : new NativeTypedArrayConstructor(data);
+	          if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);
+	          return typedArrayFrom.call(TypedArrayConstructor, data);
+	        }(), dummy, TypedArrayConstructor);
+	      });
 
-	var polyfill$8 = function getPolyfill() {
-		if (IsCallable(Array.from)) {
-			var handlesUndefMapper = tryCall(function () {
-				// Microsoft Edge v0.11 throws if the mapFn argument is *provided* but undefined,
-				// but the spec doesn't care if it's provided or not - undefined doesn't throw.
-				return Array.from([0], undefined);
-			});
-			if (!handlesUndefMapper) {
-				var origArrayFrom = Array.from;
-				return function from(items) {
-					/* eslint no-invalid-this: 0 */
-					if (arguments.length > 1 && typeof arguments[1] !== 'undefined') {
-						return Call(origArrayFrom, this, arguments);
-					} else {
-						return Call(origArrayFrom, this, [items]);
-					}
-				};
-			}
-			var implemented = tryCall(function () {
-				// Detects a Firefox bug in v32
-				// https://bugzilla.mozilla.org/show_bug.cgi?id=1063993
-				return Array.from({ 'length': -1 }) === 0;
-			})
-			&& tryCall(function () {
-				// Detects a bug in Webkit nightly r181886
-				var arr = Array.from([0].entries());
-				return arr.length === 1 && IsArray(arr[0]) && arr[0][0] === 0 && arr[0][1] === 0;
-			})
-			&& tryCall(function () {
-				return Array.from({ 'length': -Infinity });
-			});
-			if (implemented) {
-				return Array.from;
-			}
-		}
+	      if (objectSetPrototypeOf) objectSetPrototypeOf(TypedArrayConstructor, TypedArray);
+	      forEach(getOwnPropertyNames(NativeTypedArrayConstructor), function (key) {
+	        if (!(key in TypedArrayConstructor)) {
+	          createNonEnumerableProperty(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);
+	        }
+	      });
+	      TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;
+	    }
 
-		return implementation$5;
-	};
+	    if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {
+	      createNonEnumerableProperty(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
+	    }
 
-	var shim$a = function shimArrayFrom() {
-		var polyfill = polyfill$8();
+	    if (TYPED_ARRAY_TAG) {
+	      createNonEnumerableProperty(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
+	    }
 
-		defineProperties_1(Array, { 'from': polyfill }, {
-			'from': function () {
-				return Array.from !== polyfill;
-			}
-		});
+	    exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;
 
-		return polyfill;
-	};
+	    _export({
+	      global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS
+	    }, exported);
 
-	var polyfill$9 = polyfill$8();
+	    if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {
+	      createNonEnumerableProperty(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
+	    }
 
-	// eslint-disable-next-line no-unused-vars
-	var boundFromShim = function from(items) {
-		// eslint-disable-next-line no-invalid-this
-		return polyfill$9.apply(this || Array, arguments);
-	};
+	    if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {
+	      createNonEnumerableProperty(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);
+	    }
 
-	defineProperties_1(boundFromShim, {
-		'getPolyfill': polyfill$8,
-		'implementation': implementation$5,
-		'shim': shim$a
+	    setSpecies(CONSTRUCTOR_NAME);
+	  };
+	} else module.exports = function () { /* empty */ };
 	});
 
-	var array_from = boundFromShim;
+	// `Uint8Array` constructor
+	// https://tc39.github.io/ecma262/#sec-typedarray-objects
+	typedArrayConstructor('Uint8', function (init) {
+	  return function Uint8Array(data, byteOffset, length) {
+	    return init(this, data, byteOffset, length);
+	  };
+	});
 
-	var $isEnumerable$2 = callBound('Object.prototype.propertyIsEnumerable');
+	var min$4 = Math.min;
+
+	// `Array.prototype.copyWithin` method implementation
+	// https://tc39.github.io/ecma262/#sec-array.prototype.copywithin
+	var arrayCopyWithin = [].copyWithin || function copyWithin(target /* = 0 */, start /* = 0, end = @length */) {
+	  var O = toObject(this);
+	  var len = toLength(O.length);
+	  var to = toAbsoluteIndex(target, len);
+	  var from = toAbsoluteIndex(start, len);
+	  var end = arguments.length > 2 ? arguments[2] : undefined;
+	  var count = min$4((end === undefined ? len : toAbsoluteIndex(end, len)) - from, len - to);
+	  var inc = 1;
+	  if (from < to && to < from + count) {
+	    inc = -1;
+	    from += count - 1;
+	    to += count - 1;
+	  }
+	  while (count-- > 0) {
+	    if (from in O) O[to] = O[from];
+	    else delete O[to];
+	    to += inc;
+	    from += inc;
+	  } return O;
+	};
+
+	var aTypedArray$1 = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$1 = arrayBufferViewCore.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.copyWithin` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.copywithin
+	exportTypedArrayMethod$1('copyWithin', function copyWithin(target, start /* , end */) {
+	  return arrayCopyWithin.call(aTypedArray$1(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
+	});
 
-	var implementation$6 = function values(O) {
-		var obj = RequireObjectCoercible(O);
-		var vals = [];
-		for (var key in obj) {
-			if (src(obj, key) && $isEnumerable$2(obj, key)) {
-				vals.push(obj[key]);
-			}
-		}
-		return vals;
-	};
+	var $every = arrayIteration.every;
 
-	var polyfill$a = function getPolyfill() {
-		return typeof Object.values === 'function' ? Object.values : implementation$6;
-	};
+	var aTypedArray$2 = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$2 = arrayBufferViewCore.exportTypedArrayMethod;
 
-	var shim$b = function shimValues() {
-		var polyfill = polyfill$a();
-		defineProperties_1(Object, { values: polyfill }, {
-			values: function testValues() {
-				return Object.values !== polyfill;
-			}
-		});
-		return polyfill;
-	};
+	// `%TypedArray%.prototype.every` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.every
+	exportTypedArrayMethod$2('every', function every(callbackfn /* , thisArg */) {
+	  return $every(aTypedArray$2(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	var polyfill$b = polyfill$a();
+	var aTypedArray$3 = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$3 = arrayBufferViewCore.exportTypedArrayMethod;
 
-	defineProperties_1(polyfill$b, {
-		getPolyfill: polyfill$a,
-		implementation: implementation$6,
-		shim: shim$b
+	// `%TypedArray%.prototype.fill` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.fill
+	// eslint-disable-next-line no-unused-vars
+	exportTypedArrayMethod$3('fill', function fill(value /* , start, end */) {
+	  return arrayFill.apply(aTypedArray$3(this), arguments);
 	});
 
-	var object_values = polyfill$b;
+	var $filter = arrayIteration.filter;
 
-	// modified from https://github.com/es-shims/es6-shim
 
+	var aTypedArray$4 = arrayBufferViewCore.aTypedArray;
+	var aTypedArrayConstructor$2 = arrayBufferViewCore.aTypedArrayConstructor;
+	var exportTypedArrayMethod$4 = arrayBufferViewCore.exportTypedArrayMethod;
 
-	var canBeObject = function (obj) {
-		return typeof obj !== 'undefined' && obj !== null;
-	};
-	var hasSymbols$5 = shams();
-	var toObject = Object;
-	var push = functionBind.call(Function.call, Array.prototype.push);
-	var propIsEnumerable = functionBind.call(Function.call, Object.prototype.propertyIsEnumerable);
-	var originalGetSymbols = hasSymbols$5 ? Object.getOwnPropertySymbols : null;
-
-	var implementation$7 = function assign(target, source1) {
-		var arguments$1 = arguments;
-
-		if (!canBeObject(target)) { throw new TypeError('target must be an object'); }
-		var objTarget = toObject(target);
-		var s, source, i, props, syms, value, key;
-		for (s = 1; s < arguments.length; ++s) {
-			source = toObject(arguments$1[s]);
-			props = objectKeys(source);
-			var getSymbols = hasSymbols$5 && (Object.getOwnPropertySymbols || originalGetSymbols);
-			if (getSymbols) {
-				syms = getSymbols(source);
-				for (i = 0; i < syms.length; ++i) {
-					key = syms[i];
-					if (propIsEnumerable(source, key)) {
-						push(props, key);
-					}
-				}
-			}
-			for (i = 0; i < props.length; ++i) {
-				key = props[i];
-				value = source[key];
-				if (propIsEnumerable(source, key)) {
-					objTarget[key] = value;
-				}
-			}
-		}
-		return objTarget;
-	};
+	// `%TypedArray%.prototype.filter` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.filter
+	exportTypedArrayMethod$4('filter', function filter(callbackfn /* , thisArg */) {
+	  var list = $filter(aTypedArray$4(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  var C = speciesConstructor(this, this.constructor);
+	  var index = 0;
+	  var length = list.length;
+	  var result = new (aTypedArrayConstructor$2(C))(length);
+	  while (length > index) result[index] = list[index++];
+	  return result;
+	});
 
-	var lacksProperEnumerationOrder = function () {
-		if (!Object.assign) {
-			return false;
-		}
-		// v8, specifically in node 4.x, has a bug with incorrect property enumeration order
-		// note: this does not detect the bug unless there's 20 characters
-		var str = 'abcdefghijklmnopqrst';
-		var letters = str.split('');
-		var map = {};
-		for (var i = 0; i < letters.length; ++i) {
-			map[letters[i]] = letters[i];
-		}
-		var obj = Object.assign({}, map);
-		var actual = '';
-		for (var k in obj) {
-			actual += k;
-		}
-		return str !== actual;
-	};
+	var $find = arrayIteration.find;
 
-	var assignHasPendingExceptions = function () {
-		if (!Object.assign || !Object.preventExtensions) {
-			return false;
-		}
-		// Firefox 37 still has "pending exception" logic in its Object.assign implementation,
-		// which is 72% slower than our shim, and Firefox 40's native implementation.
-		var thrower = Object.preventExtensions({ 1: 2 });
-		try {
-			Object.assign(thrower, 'xy');
-		} catch (e) {
-			return thrower[1] === 'y';
-		}
-		return false;
-	};
+	var aTypedArray$5 = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$5 = arrayBufferViewCore.exportTypedArrayMethod;
 
-	var polyfill$c = function getPolyfill() {
-		if (!Object.assign) {
-			return implementation$7;
-		}
-		if (lacksProperEnumerationOrder()) {
-			return implementation$7;
-		}
-		if (assignHasPendingExceptions()) {
-			return implementation$7;
-		}
-		return Object.assign;
-	};
+	// `%TypedArray%.prototype.find` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.find
+	exportTypedArrayMethod$5('find', function find(predicate /* , thisArg */) {
+	  return $find(aTypedArray$5(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	var shim$c = function shimAssign() {
-		var polyfill = polyfill$c();
-		defineProperties_1(
-			Object,
-			{ assign: polyfill },
-			{ assign: function () { return Object.assign !== polyfill; } }
-		);
-		return polyfill;
-	};
+	var $findIndex = arrayIteration.findIndex;
 
-	var polyfill$d = polyfill$c();
+	var aTypedArray$6 = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$6 = arrayBufferViewCore.exportTypedArrayMethod;
 
-	defineProperties_1(polyfill$d, {
-		getPolyfill: polyfill$c,
-		implementation: implementation$7,
-		shim: shim$c
+	// `%TypedArray%.prototype.findIndex` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.findindex
+	exportTypedArrayMethod$6('findIndex', function findIndex(predicate /* , thisArg */) {
+	  return $findIndex(aTypedArray$6(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
 	});
 
-	var object_assign = polyfill$d;
+	var $forEach$2 = arrayIteration.forEach;
 
-	/**
-	 * @this {Promise}
-	 */
-	function finallyConstructor(callback) {
-	  var constructor = this.constructor;
-	  return this.then(
-	    function(value) {
-	      // @ts-ignore
-	      return constructor.resolve(callback()).then(function() {
-	        return value;
-	      });
-	    },
-	    function(reason) {
-	      // @ts-ignore
-	      return constructor.resolve(callback()).then(function() {
-	        // @ts-ignore
-	        return constructor.reject(reason);
-	      });
-	    }
-	  );
-	}
+	var aTypedArray$7 = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$7 = arrayBufferViewCore.exportTypedArrayMethod;
 
-	// Store setTimeout reference so promise-polyfill will be unaffected by
-	// other code modifying setTimeout (like sinon.useFakeTimers())
-	var setTimeoutFunc = setTimeout;
+	// `%TypedArray%.prototype.forEach` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.foreach
+	exportTypedArrayMethod$7('forEach', function forEach(callbackfn /* , thisArg */) {
+	  $forEach$2(aTypedArray$7(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	function isArray$4(x) {
-	  return Boolean(x && typeof x.length !== 'undefined');
-	}
+	var $includes = arrayIncludes.includes;
 
-	function noop$1() {}
+	var aTypedArray$8 = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$8 = arrayBufferViewCore.exportTypedArrayMethod;
 
-	// Polyfill for Function.prototype.bind
-	function bind$2(fn, thisArg) {
-	  return function() {
-	    fn.apply(thisArg, arguments);
-	  };
-	}
+	// `%TypedArray%.prototype.includes` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.includes
+	exportTypedArrayMethod$8('includes', function includes(searchElement /* , fromIndex */) {
+	  return $includes(aTypedArray$8(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	/**
-	 * @constructor
-	 * @param {Function} fn
-	 */
-	function Promise$1(fn) {
-	  if (!(this instanceof Promise$1))
-	    { throw new TypeError('Promises must be constructed via new'); }
-	  if (typeof fn !== 'function') { throw new TypeError('not a function'); }
-	  /** @type {!number} */
-	  this._state = 0;
-	  /** @type {!boolean} */
-	  this._handled = false;
-	  /** @type {Promise|undefined} */
-	  this._value = undefined;
-	  /** @type {!Array<!Function>} */
-	  this._deferreds = [];
-
-	  doResolve(fn, this);
-	}
-
-	function handle(self, deferred) {
-	  while (self._state === 3) {
-	    self = self._value;
-	  }
-	  if (self._state === 0) {
-	    self._deferreds.push(deferred);
-	    return;
-	  }
-	  self._handled = true;
-	  Promise$1._immediateFn(function() {
-	    var cb = self._state === 1 ? deferred.onFulfilled : deferred.onRejected;
-	    if (cb === null) {
-	      (self._state === 1 ? resolve : reject)(deferred.promise, self._value);
-	      return;
-	    }
-	    var ret;
-	    try {
-	      ret = cb(self._value);
-	    } catch (e) {
-	      reject(deferred.promise, e);
-	      return;
-	    }
-	    resolve(deferred.promise, ret);
-	  });
-	}
+	var $indexOf$1 = arrayIncludes.indexOf;
 
-	function resolve(self, newValue) {
-	  try {
-	    // Promise Resolution Procedure: https://github.com/promises-aplus/promises-spec#the-promise-resolution-procedure
-	    if (newValue === self)
-	      { throw new TypeError('A promise cannot be resolved with itself.'); }
-	    if (
-	      newValue &&
-	      (typeof newValue === 'object' || typeof newValue === 'function')
-	    ) {
-	      var then = newValue.then;
-	      if (newValue instanceof Promise$1) {
-	        self._state = 3;
-	        self._value = newValue;
-	        finale(self);
-	        return;
-	      } else if (typeof then === 'function') {
-	        doResolve(bind$2(then, newValue), self);
-	        return;
-	      }
-	    }
-	    self._state = 1;
-	    self._value = newValue;
-	    finale(self);
-	  } catch (e) {
-	    reject(self, e);
-	  }
-	}
+	var aTypedArray$9 = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$9 = arrayBufferViewCore.exportTypedArrayMethod;
 
-	function reject(self, newValue) {
-	  self._state = 2;
-	  self._value = newValue;
-	  finale(self);
-	}
+	// `%TypedArray%.prototype.indexOf` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.indexof
+	exportTypedArrayMethod$9('indexOf', function indexOf(searchElement /* , fromIndex */) {
+	  return $indexOf$1(aTypedArray$9(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	function finale(self) {
-	  if (self._state === 2 && self._deferreds.length === 0) {
-	    Promise$1._immediateFn(function() {
-	      if (!self._handled) {
-	        Promise$1._unhandledRejectionFn(self._value);
-	      }
-	    });
-	  }
+	var ITERATOR$5 = wellKnownSymbol('iterator');
+	var Uint8Array$1 = global_1.Uint8Array;
+	var arrayValues = es_array_iterator.values;
+	var arrayKeys = es_array_iterator.keys;
+	var arrayEntries = es_array_iterator.entries;
+	var aTypedArray$a = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$a = arrayBufferViewCore.exportTypedArrayMethod;
+	var nativeTypedArrayIterator = Uint8Array$1 && Uint8Array$1.prototype[ITERATOR$5];
 
-	  for (var i = 0, len = self._deferreds.length; i < len; i++) {
-	    handle(self, self._deferreds[i]);
-	  }
-	  self._deferreds = null;
-	}
+	var CORRECT_ITER_NAME = !!nativeTypedArrayIterator
+	  && (nativeTypedArrayIterator.name == 'values' || nativeTypedArrayIterator.name == undefined);
 
-	/**
-	 * @constructor
-	 */
-	function Handler(onFulfilled, onRejected, promise) {
-	  this.onFulfilled = typeof onFulfilled === 'function' ? onFulfilled : null;
-	  this.onRejected = typeof onRejected === 'function' ? onRejected : null;
-	  this.promise = promise;
-	}
+	var typedArrayValues = function values() {
+	  return arrayValues.call(aTypedArray$a(this));
+	};
 
-	/**
-	 * Take a potentially misbehaving resolver function and make sure
-	 * onFulfilled and onRejected are only called once.
-	 *
-	 * Makes no guarantees about asynchrony.
-	 */
-	function doResolve(fn, self) {
-	  var done = false;
-	  try {
-	    fn(
-	      function(value) {
-	        if (done) { return; }
-	        done = true;
-	        resolve(self, value);
-	      },
-	      function(reason) {
-	        if (done) { return; }
-	        done = true;
-	        reject(self, reason);
-	      }
-	    );
-	  } catch (ex) {
-	    if (done) { return; }
-	    done = true;
-	    reject(self, ex);
-	  }
-	}
+	// `%TypedArray%.prototype.entries` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.entries
+	exportTypedArrayMethod$a('entries', function entries() {
+	  return arrayEntries.call(aTypedArray$a(this));
+	});
+	// `%TypedArray%.prototype.keys` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.keys
+	exportTypedArrayMethod$a('keys', function keys() {
+	  return arrayKeys.call(aTypedArray$a(this));
+	});
+	// `%TypedArray%.prototype.values` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.values
+	exportTypedArrayMethod$a('values', typedArrayValues, !CORRECT_ITER_NAME);
+	// `%TypedArray%.prototype[@@iterator]` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype-@@iterator
+	exportTypedArrayMethod$a(ITERATOR$5, typedArrayValues, !CORRECT_ITER_NAME);
+
+	var aTypedArray$b = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$b = arrayBufferViewCore.exportTypedArrayMethod;
+	var $join = [].join;
+
+	// `%TypedArray%.prototype.join` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.join
+	// eslint-disable-next-line no-unused-vars
+	exportTypedArrayMethod$b('join', function join(separator) {
+	  return $join.apply(aTypedArray$b(this), arguments);
+	});
 
-	Promise$1.prototype['catch'] = function(onRejected) {
-	  return this.then(null, onRejected);
-	};
+	var min$5 = Math.min;
+	var nativeLastIndexOf = [].lastIndexOf;
+	var NEGATIVE_ZERO$1 = !!nativeLastIndexOf && 1 / [1].lastIndexOf(1, -0) < 0;
+	var STRICT_METHOD$3 = arrayMethodIsStrict('lastIndexOf');
+	// For preventing possible almost infinite loop in non-standard implementations, test the forward version of the method
+	var USES_TO_LENGTH$4 = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });
+	var FORCED$1 = NEGATIVE_ZERO$1 || !STRICT_METHOD$3 || !USES_TO_LENGTH$4;
+
+	// `Array.prototype.lastIndexOf` method implementation
+	// https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof
+	var arrayLastIndexOf = FORCED$1 ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
+	  // convert -0 to +0
+	  if (NEGATIVE_ZERO$1) return nativeLastIndexOf.apply(this, arguments) || 0;
+	  var O = toIndexedObject(this);
+	  var length = toLength(O.length);
+	  var index = length - 1;
+	  if (arguments.length > 1) index = min$5(index, toInteger(arguments[1]));
+	  if (index < 0) index = length + index;
+	  for (;index >= 0; index--) if (index in O && O[index] === searchElement) return index || 0;
+	  return -1;
+	} : nativeLastIndexOf;
 
-	Promise$1.prototype.then = function(onFulfilled, onRejected) {
-	  // @ts-ignore
-	  var prom = new this.constructor(noop$1);
+	var aTypedArray$c = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$c = arrayBufferViewCore.exportTypedArrayMethod;
 
-	  handle(this, new Handler(onFulfilled, onRejected, prom));
-	  return prom;
-	};
+	// `%TypedArray%.prototype.lastIndexOf` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.lastindexof
+	// eslint-disable-next-line no-unused-vars
+	exportTypedArrayMethod$c('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {
+	  return arrayLastIndexOf.apply(aTypedArray$c(this), arguments);
+	});
 
-	Promise$1.prototype['finally'] = finallyConstructor;
+	var $map$1 = arrayIteration.map;
 
-	Promise$1.all = function(arr) {
-	  return new Promise$1(function(resolve, reject) {
-	    if (!isArray$4(arr)) {
-	      return reject(new TypeError('Promise.all accepts an array'));
-	    }
 
-	    var args = Array.prototype.slice.call(arr);
-	    if (args.length === 0) { return resolve([]); }
-	    var remaining = args.length;
+	var aTypedArray$d = arrayBufferViewCore.aTypedArray;
+	var aTypedArrayConstructor$3 = arrayBufferViewCore.aTypedArrayConstructor;
+	var exportTypedArrayMethod$d = arrayBufferViewCore.exportTypedArrayMethod;
 
-	    function res(i, val) {
-	      try {
-	        if (val && (typeof val === 'object' || typeof val === 'function')) {
-	          var then = val.then;
-	          if (typeof then === 'function') {
-	            then.call(
-	              val,
-	              function(val) {
-	                res(i, val);
-	              },
-	              reject
-	            );
-	            return;
-	          }
-	        }
-	        args[i] = val;
-	        if (--remaining === 0) {
-	          resolve(args);
-	        }
-	      } catch (ex) {
-	        reject(ex);
+	// `%TypedArray%.prototype.map` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.map
+	exportTypedArrayMethod$d('map', function map(mapfn /* , thisArg */) {
+	  return $map$1(aTypedArray$d(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {
+	    return new (aTypedArrayConstructor$3(speciesConstructor(O, O.constructor)))(length);
+	  });
+	});
+
+	// `Array.prototype.{ reduce, reduceRight }` methods implementation
+	var createMethod$4 = function (IS_RIGHT) {
+	  return function (that, callbackfn, argumentsLength, memo) {
+	    aFunction$1(callbackfn);
+	    var O = toObject(that);
+	    var self = indexedObject(O);
+	    var length = toLength(O.length);
+	    var index = IS_RIGHT ? length - 1 : 0;
+	    var i = IS_RIGHT ? -1 : 1;
+	    if (argumentsLength < 2) while (true) {
+	      if (index in self) {
+	        memo = self[index];
+	        index += i;
+	        break;
+	      }
+	      index += i;
+	      if (IS_RIGHT ? index < 0 : length <= index) {
+	        throw TypeError('Reduce of empty array with no initial value');
 	      }
 	    }
-
-	    for (var i = 0; i < args.length; i++) {
-	      res(i, args[i]);
+	    for (;IS_RIGHT ? index >= 0 : length > index; index += i) if (index in self) {
+	      memo = callbackfn(memo, self[index], index, O);
 	    }
-	  });
+	    return memo;
+	  };
 	};
 
-	Promise$1.resolve = function(value) {
-	  if (value && typeof value === 'object' && value.constructor === Promise$1) {
-	    return value;
-	  }
-
-	  return new Promise$1(function(resolve) {
-	    resolve(value);
-	  });
+	var arrayReduce = {
+	  // `Array.prototype.reduce` method
+	  // https://tc39.github.io/ecma262/#sec-array.prototype.reduce
+	  left: createMethod$4(false),
+	  // `Array.prototype.reduceRight` method
+	  // https://tc39.github.io/ecma262/#sec-array.prototype.reduceright
+	  right: createMethod$4(true)
 	};
 
-	Promise$1.reject = function(value) {
-	  return new Promise$1(function(resolve, reject) {
-	    reject(value);
-	  });
-	};
+	var $reduce = arrayReduce.left;
 
-	Promise$1.race = function(arr) {
-	  return new Promise$1(function(resolve, reject) {
-	    if (!isArray$4(arr)) {
-	      return reject(new TypeError('Promise.race accepts an array'));
-	    }
+	var aTypedArray$e = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$e = arrayBufferViewCore.exportTypedArrayMethod;
 
-	    for (var i = 0, len = arr.length; i < len; i++) {
-	      Promise$1.resolve(arr[i]).then(resolve, reject);
-	    }
-	  });
-	};
+	// `%TypedArray%.prototype.reduce` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reduce
+	exportTypedArrayMethod$e('reduce', function reduce(callbackfn /* , initialValue */) {
+	  return $reduce(aTypedArray$e(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	// Use polyfill for setImmediate for performance gains
-	Promise$1._immediateFn =
-	  // @ts-ignore
-	  (typeof setImmediate === 'function' &&
-	    function(fn) {
-	      // @ts-ignore
-	      setImmediate(fn);
-	    }) ||
-	  function(fn) {
-	    setTimeoutFunc(fn, 0);
-	  };
+	var $reduceRight = arrayReduce.right;
 
-	Promise$1._unhandledRejectionFn = function _unhandledRejectionFn(err) {
-	  if (typeof console !== 'undefined' && console) {
-	    console.warn('Possible Unhandled Promise Rejection:', err); // eslint-disable-line no-console
-	  }
-	};
+	var aTypedArray$f = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$f = arrayBufferViewCore.exportTypedArrayMethod;
 
-	/** @suppress {undefinedVars} */
-	var globalNS = (function() {
-	  // the only reliable means to get the global object is
-	  // `Function('return this')()`
-	  // However, this causes CSP violations in Chrome apps.
-	  if (typeof self !== 'undefined') {
-	    return self;
-	  }
-	  if (typeof window !== 'undefined') {
-	    return window;
-	  }
-	  if (typeof global !== 'undefined') {
-	    return global;
-	  }
-	  throw new Error('unable to locate global object');
-	})();
+	// `%TypedArray%.prototype.reduceRicht` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reduceright
+	exportTypedArrayMethod$f('reduceRight', function reduceRight(callbackfn /* , initialValue */) {
+	  return $reduceRight(aTypedArray$f(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+	});
 
-	if (!('Promise' in globalNS)) {
-	  globalNS['Promise'] = Promise$1;
-	} else if (!globalNS.Promise.prototype['finally']) {
-	  globalNS.Promise.prototype['finally'] = finallyConstructor;
-	}
+	var aTypedArray$g = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$g = arrayBufferViewCore.exportTypedArrayMethod;
+	var floor$3 = Math.floor;
+
+	// `%TypedArray%.prototype.reverse` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reverse
+	exportTypedArrayMethod$g('reverse', function reverse() {
+	  var that = this;
+	  var length = aTypedArray$g(that).length;
+	  var middle = floor$3(length / 2);
+	  var index = 0;
+	  var value;
+	  while (index < middle) {
+	    value = that[index];
+	    that[index++] = that[--length];
+	    that[length] = value;
+	  } return that;
+	});
 
-	var polyfill$e = /*#__PURE__*/Object.freeze({
-		__proto__: null
+	var aTypedArray$h = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$h = arrayBufferViewCore.exportTypedArrayMethod;
+
+	var FORCED$2 = fails(function () {
+	  // eslint-disable-next-line no-undef
+	  new Int8Array(1).set({});
 	});
 
-	var setAsap = createCommonjsModule(function (module) {
-	(function (thisVar, undefined$1) {
-		var main = (typeof window === 'object' && window) || (typeof commonjsGlobal === 'object' && commonjsGlobal) ||
-			typeof self === 'object' && self || thisVar;
+	// `%TypedArray%.prototype.set` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.set
+	exportTypedArrayMethod$h('set', function set(arrayLike /* , offset */) {
+	  aTypedArray$h(this);
+	  var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);
+	  var length = this.length;
+	  var src = toObject(arrayLike);
+	  var len = toLength(src.length);
+	  var index = 0;
+	  if (len + offset > length) throw RangeError('Wrong length');
+	  while (index < len) this[offset + index] = src[index++];
+	}, FORCED$2);
+
+	var aTypedArray$i = arrayBufferViewCore.aTypedArray;
+	var aTypedArrayConstructor$4 = arrayBufferViewCore.aTypedArrayConstructor;
+	var exportTypedArrayMethod$i = arrayBufferViewCore.exportTypedArrayMethod;
+	var $slice = [].slice;
+
+	var FORCED$3 = fails(function () {
+	  // eslint-disable-next-line no-undef
+	  new Int8Array(1).slice();
+	});
 
-		var hasSetImmediate = typeof setImmediate === 'function';
-		var hasNextTick = typeof process === 'object' && !!process && typeof process.nextTick === 'function';
-		var index = 0;
+	// `%TypedArray%.prototype.slice` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.slice
+	exportTypedArrayMethod$i('slice', function slice(start, end) {
+	  var list = $slice.call(aTypedArray$i(this), start, end);
+	  var C = speciesConstructor(this, this.constructor);
+	  var index = 0;
+	  var length = list.length;
+	  var result = new (aTypedArrayConstructor$4(C))(length);
+	  while (length > index) result[index] = list[index++];
+	  return result;
+	}, FORCED$3);
 
-		function getNewIndex() {
-			if (index === 9007199254740991) {
-				return 0;
-			}
-			return ++index;
-		}
-
-		var setAsap = (function () {
-			var hiddenDiv, scriptEl, timeoutFn, callbacks;
-
-			// Modern browsers, fastest async
-			if (main.MutationObserver) {
-				return function setAsap(callback) {
-					hiddenDiv = document.createElement("div");
-					(new MutationObserver(function() {
-						callback();
-						hiddenDiv = null;
-					})).observe(hiddenDiv, { attributes: true });
-					hiddenDiv.setAttribute('i', '1');
-				};
-
-			// Browsers that support postMessage
-			} else if (!hasSetImmediate && main.postMessage && !main.importScripts && main.addEventListener) {
-
-				var MESSAGE_PREFIX = "com.setImmediate" + Math.random();
-				callbacks = {};
-
-				var onGlobalMessage = function (event) {
-					if (event.source === main && event.data.indexOf(MESSAGE_PREFIX) === 0) {
-						var i = +event.data.split(':')[1];
-						callbacks[i]();
-						delete callbacks[i];
-					}
-				};
-
-				main.addEventListener("message", onGlobalMessage, false);
-
-				return function setAsap(callback) {
-					var i = getNewIndex();
-					callbacks[i] = callback;
-					main.postMessage(MESSAGE_PREFIX + ':' + i, "*");
-				};
-
-				// IE browsers without postMessage
-			} else if (!hasSetImmediate && main.document && 'onreadystatechange' in document.createElement('script')) {
-
-				return function setAsap(callback) {
-					scriptEl = document.createElement("script");
-					scriptEl.onreadystatechange = function onreadystatechange() {
-						scriptEl.onreadystatechange = null;
-						scriptEl.parentNode.removeChild(scriptEl);
-						scriptEl = null;
-						callback();
-					};
-					document.body.appendChild(scriptEl);
-				};
-
-			// All other browsers and node
-			} else {
-
-				timeoutFn = (hasSetImmediate && setImmediate) || (hasNextTick && process.nextTick) || setTimeout;
-				return function setAsap(callback) {
-					timeoutFn(callback);
-				};
-			}
+	var $some = arrayIteration.some;
+
+	var aTypedArray$j = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$j = arrayBufferViewCore.exportTypedArrayMethod;
 
-		})();
-
-		if ( module.exports) {
-			module.exports = setAsap;
-		} else if (typeof commonjsRequire !== 'undefined' && commonjsRequire.amd) {
-			undefined$1(function () {
-				return setAsap;
-			});
-		} else {
-			main.setAsap = setAsap;
-		}
-	})(commonjsGlobal);
+	// `%TypedArray%.prototype.some` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.some
+	exportTypedArrayMethod$j('some', function some(callbackfn /* , thisArg */) {
+	  return $some(aTypedArray$j(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
 	});
 
-	var performanceNow = createCommonjsModule(function (module) {
-	// Generated by CoffeeScript 1.12.2
-	(function() {
-	  var getNanoSeconds, hrtime, loadTime, moduleLoadTime, nodeLoadTime, upTime;
+	var aTypedArray$k = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$k = arrayBufferViewCore.exportTypedArrayMethod;
+	var $sort = [].sort;
 
-	  if ((typeof performance !== "undefined" && performance !== null) && performance.now) {
-	    module.exports = function() {
-	      return performance.now();
-	    };
-	  } else if ((typeof process !== "undefined" && process !== null) && process.hrtime) {
-	    module.exports = function() {
-	      return (getNanoSeconds() - nodeLoadTime) / 1e6;
-	    };
-	    hrtime = process.hrtime;
-	    getNanoSeconds = function() {
-	      var hr;
-	      hr = hrtime();
-	      return hr[0] * 1e9 + hr[1];
-	    };
-	    moduleLoadTime = getNanoSeconds();
-	    upTime = process.uptime() * 1e9;
-	    nodeLoadTime = moduleLoadTime - upTime;
-	  } else if (Date.now) {
-	    module.exports = function() {
-	      return Date.now() - loadTime;
-	    };
-	    loadTime = Date.now();
-	  } else {
-	    module.exports = function() {
-	      return new Date().getTime() - loadTime;
-	    };
-	    loadTime = new Date().getTime();
-	  }
+	// `%TypedArray%.prototype.sort` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.sort
+	exportTypedArrayMethod$k('sort', function sort(comparefn) {
+	  return $sort.call(aTypedArray$k(this), comparefn);
+	});
 
-	}).call(commonjsGlobal);
+	var aTypedArray$l = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$l = arrayBufferViewCore.exportTypedArrayMethod;
+
+	// `%TypedArray%.prototype.subarray` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.subarray
+	exportTypedArrayMethod$l('subarray', function subarray(begin, end) {
+	  var O = aTypedArray$l(this);
+	  var length = O.length;
+	  var beginIndex = toAbsoluteIndex(begin, length);
+	  return new (speciesConstructor(O, O.constructor))(
+	    O.buffer,
+	    O.byteOffset + beginIndex * O.BYTES_PER_ELEMENT,
+	    toLength((end === undefined ? length : toAbsoluteIndex(end, length)) - beginIndex)
+	  );
+	});
 
+	var Int8Array$3 = global_1.Int8Array;
+	var aTypedArray$m = arrayBufferViewCore.aTypedArray;
+	var exportTypedArrayMethod$m = arrayBufferViewCore.exportTypedArrayMethod;
+	var $toLocaleString = [].toLocaleString;
+	var $slice$1 = [].slice;
 
+	// iOS Safari 6.x fails here
+	var TO_LOCALE_STRING_BUG = !!Int8Array$3 && fails(function () {
+	  $toLocaleString.call(new Int8Array$3(1));
 	});
 
-	var root = typeof window === 'undefined' ? commonjsGlobal : window
-	  , vendors = ['moz', 'webkit']
-	  , suffix = 'AnimationFrame'
-	  , raf = root['request' + suffix]
-	  , caf = root['cancel' + suffix] || root['cancelRequest' + suffix];
-
-	for(var i = 0; !raf && i < vendors.length; i++) {
-	  raf = root[vendors[i] + 'Request' + suffix];
-	  caf = root[vendors[i] + 'Cancel' + suffix]
-	      || root[vendors[i] + 'CancelRequest' + suffix];
-	}
-
-	// Some versions of FF have rAF but not cAF
-	if(!raf || !caf) {
-	  var last = 0
-	    , id$2 = 0
-	    , queue = []
-	    , frameDuration = 1000 / 60;
-
-	  raf = function(callback) {
-	    if(queue.length === 0) {
-	      var _now = performanceNow()
-	        , next = Math.max(0, frameDuration - (_now - last));
-	      last = next + _now;
-	      setTimeout(function() {
-	        var cp = queue.slice(0);
-	        // Clear queue here to prevent
-	        // callbacks from appending listeners
-	        // to the current frame's queue
-	        queue.length = 0;
-	        for(var i = 0; i < cp.length; i++) {
-	          if(!cp[i].cancelled) {
-	            try{
-	              cp[i].callback(last);
-	            } catch(e) {
-	              setTimeout(function() { throw e }, 0);
-	            }
-	          }
-	        }
-	      }, Math.round(next));
-	    }
-	    queue.push({
-	      handle: ++id$2,
-	      callback: callback,
-	      cancelled: false
-	    });
-	    return id$2
-	  };
+	var FORCED$4 = fails(function () {
+	  return [1, 2].toLocaleString() != new Int8Array$3([1, 2]).toLocaleString();
+	}) || !fails(function () {
+	  Int8Array$3.prototype.toLocaleString.call([1, 2]);
+	});
 
-	  caf = function(handle) {
-	    for(var i = 0; i < queue.length; i++) {
-	      if(queue[i].handle === handle) {
-	        queue[i].cancelled = true;
+	// `%TypedArray%.prototype.toLocaleString` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.tolocalestring
+	exportTypedArrayMethod$m('toLocaleString', function toLocaleString() {
+	  return $toLocaleString.apply(TO_LOCALE_STRING_BUG ? $slice$1.call(aTypedArray$m(this)) : aTypedArray$m(this), arguments);
+	}, FORCED$4);
+
+	var exportTypedArrayMethod$n = arrayBufferViewCore.exportTypedArrayMethod;
+
+
+
+	var Uint8Array$2 = global_1.Uint8Array;
+	var Uint8ArrayPrototype = Uint8Array$2 && Uint8Array$2.prototype || {};
+	var arrayToString = [].toString;
+	var arrayJoin = [].join;
+
+	if (fails(function () { arrayToString.call({}); })) {
+	  arrayToString = function toString() {
+	    return arrayJoin.call(this);
+	  };
+	}
+
+	var IS_NOT_ARRAY_METHOD = Uint8ArrayPrototype.toString != arrayToString;
+
+	// `%TypedArray%.prototype.toString` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.tostring
+	exportTypedArrayMethod$n('toString', arrayToString, IS_NOT_ARRAY_METHOD);
+
+	// iterable DOM collections
+	// flag - `iterable` interface - 'entries', 'keys', 'values', 'forEach' methods
+	var domIterables = {
+	  CSSRuleList: 0,
+	  CSSStyleDeclaration: 0,
+	  CSSValueList: 0,
+	  ClientRectList: 0,
+	  DOMRectList: 0,
+	  DOMStringList: 0,
+	  DOMTokenList: 1,
+	  DataTransferItemList: 0,
+	  FileList: 0,
+	  HTMLAllCollection: 0,
+	  HTMLCollection: 0,
+	  HTMLFormElement: 0,
+	  HTMLSelectElement: 0,
+	  MediaList: 0,
+	  MimeTypeArray: 0,
+	  NamedNodeMap: 0,
+	  NodeList: 1,
+	  PaintRequestList: 0,
+	  Plugin: 0,
+	  PluginArray: 0,
+	  SVGLengthList: 0,
+	  SVGNumberList: 0,
+	  SVGPathSegList: 0,
+	  SVGPointList: 0,
+	  SVGStringList: 0,
+	  SVGTransformList: 0,
+	  SourceBufferList: 0,
+	  StyleSheetList: 0,
+	  TextTrackCueList: 0,
+	  TextTrackList: 0,
+	  TouchList: 0
+	};
+
+	for (var COLLECTION_NAME in domIterables) {
+	  var Collection = global_1[COLLECTION_NAME];
+	  var CollectionPrototype = Collection && Collection.prototype;
+	  // some Chrome versions have non-configurable methods on DOMTokenList
+	  if (CollectionPrototype && CollectionPrototype.forEach !== arrayForEach) try {
+	    createNonEnumerableProperty(CollectionPrototype, 'forEach', arrayForEach);
+	  } catch (error) {
+	    CollectionPrototype.forEach = arrayForEach;
+	  }
+	}
+
+	var ITERATOR$6 = wellKnownSymbol('iterator');
+	var TO_STRING_TAG$4 = wellKnownSymbol('toStringTag');
+	var ArrayValues = es_array_iterator.values;
+
+	for (var COLLECTION_NAME$1 in domIterables) {
+	  var Collection$1 = global_1[COLLECTION_NAME$1];
+	  var CollectionPrototype$1 = Collection$1 && Collection$1.prototype;
+	  if (CollectionPrototype$1) {
+	    // some Chrome versions have non-configurable methods on DOMTokenList
+	    if (CollectionPrototype$1[ITERATOR$6] !== ArrayValues) try {
+	      createNonEnumerableProperty(CollectionPrototype$1, ITERATOR$6, ArrayValues);
+	    } catch (error) {
+	      CollectionPrototype$1[ITERATOR$6] = ArrayValues;
+	    }
+	    if (!CollectionPrototype$1[TO_STRING_TAG$4]) {
+	      createNonEnumerableProperty(CollectionPrototype$1, TO_STRING_TAG$4, COLLECTION_NAME$1);
+	    }
+	    if (domIterables[COLLECTION_NAME$1]) for (var METHOD_NAME in es_array_iterator) {
+	      // some Chrome versions have non-configurable methods on DOMTokenList
+	      if (CollectionPrototype$1[METHOD_NAME] !== es_array_iterator[METHOD_NAME]) try {
+	        createNonEnumerableProperty(CollectionPrototype$1, METHOD_NAME, es_array_iterator[METHOD_NAME]);
+	      } catch (error) {
+	        CollectionPrototype$1[METHOD_NAME] = es_array_iterator[METHOD_NAME];
 	      }
 	    }
-	  };
+	  }
 	}
 
-	var raf_1 = function(fn) {
-	  // Wrap in a new function to prevent
-	  // `cancel` potentially being assigned
-	  // to the native rAF function
-	  return raf.call(root, fn)
-	};
-	var cancel = function() {
-	  caf.apply(root, arguments);
+	var slice = [].slice;
+	var MSIE = /MSIE .\./.test(engineUserAgent); // <- dirty ie9- check
+
+	var wrap$1 = function (scheduler) {
+	  return function (handler, timeout /* , ...arguments */) {
+	    var boundArgs = arguments.length > 2;
+	    var args = boundArgs ? slice.call(arguments, 2) : undefined;
+	    return scheduler(boundArgs ? function () {
+	      // eslint-disable-next-line no-new-func
+	      (typeof handler == 'function' ? handler : Function(handler)).apply(this, args);
+	    } : handler, timeout);
+	  };
 	};
-	var polyfill$f = function(object) {
-	  if (!object) {
-	    object = root;
+
+	// ie9- setTimeout & setInterval additional parameters fix
+	// https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timers
+	_export({ global: true, bind: true, forced: MSIE }, {
+	  // `setTimeout` method
+	  // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-settimeout
+	  setTimeout: wrap$1(global_1.setTimeout),
+	  // `setInterval` method
+	  // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-setinterval
+	  setInterval: wrap$1(global_1.setInterval)
+	});
+
+	var ITERATOR$7 = wellKnownSymbol('iterator');
+
+	var nativeUrl = !fails(function () {
+	  var url = new URL('b?a=1&b=2&c=3', 'http://a');
+	  var searchParams = url.searchParams;
+	  var result = '';
+	  url.pathname = 'c%20d';
+	  searchParams.forEach(function (value, key) {
+	    searchParams['delete']('b');
+	    result += key + value;
+	  });
+	  return (isPure && !url.toJSON)
+	    || !searchParams.sort
+	    || url.href !== 'http://a/c%20d?a=1&c=3'
+	    || searchParams.get('c') !== '3'
+	    || String(new URLSearchParams('?a=1')) !== 'a=1'
+	    || !searchParams[ITERATOR$7]
+	    // throws in Edge
+	    || new URL('https://a@b').username !== 'a'
+	    || new URLSearchParams(new URLSearchParams('a=b')).get('a') !== 'b'
+	    // not punycoded in Edge
+	    || new URL('http://тест').host !== 'xn--e1aybc'
+	    // not escaped in Chrome 62-
+	    || new URL('http://a#б').hash !== '#%D0%B1'
+	    // fails in Chrome 66-
+	    || result !== 'a1c3'
+	    // throws in Safari
+	    || new URL('http://x', undefined).host !== 'x';
+	});
+
+	var nativeAssign = Object.assign;
+	var defineProperty$7 = Object.defineProperty;
+
+	// `Object.assign` method
+	// https://tc39.github.io/ecma262/#sec-object.assign
+	var objectAssign = !nativeAssign || fails(function () {
+	  // should have correct order of operations (Edge bug)
+	  if (descriptors && nativeAssign({ b: 1 }, nativeAssign(defineProperty$7({}, 'a', {
+	    enumerable: true,
+	    get: function () {
+	      defineProperty$7(this, 'b', {
+	        value: 3,
+	        enumerable: false
+	      });
+	    }
+	  }), { b: 2 })).b !== 1) return true;
+	  // should work with symbols and should have deterministic property order (V8 bug)
+	  var A = {};
+	  var B = {};
+	  // eslint-disable-next-line no-undef
+	  var symbol = Symbol();
+	  var alphabet = 'abcdefghijklmnopqrst';
+	  A[symbol] = 7;
+	  alphabet.split('').forEach(function (chr) { B[chr] = chr; });
+	  return nativeAssign({}, A)[symbol] != 7 || objectKeys(nativeAssign({}, B)).join('') != alphabet;
+	}) ? function assign(target, source) { // eslint-disable-line no-unused-vars
+	  var T = toObject(target);
+	  var argumentsLength = arguments.length;
+	  var index = 1;
+	  var getOwnPropertySymbols = objectGetOwnPropertySymbols.f;
+	  var propertyIsEnumerable = objectPropertyIsEnumerable.f;
+	  while (argumentsLength > index) {
+	    var S = indexedObject(arguments[index++]);
+	    var keys = getOwnPropertySymbols ? objectKeys(S).concat(getOwnPropertySymbols(S)) : objectKeys(S);
+	    var length = keys.length;
+	    var j = 0;
+	    var key;
+	    while (length > j) {
+	      key = keys[j++];
+	      if (!descriptors || propertyIsEnumerable.call(S, key)) T[key] = S[key];
+	    }
+	  } return T;
+	} : nativeAssign;
+
+	// `Array.from` method implementation
+	// https://tc39.github.io/ecma262/#sec-array.from
+	var arrayFrom = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {
+	  var O = toObject(arrayLike);
+	  var C = typeof this == 'function' ? this : Array;
+	  var argumentsLength = arguments.length;
+	  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
+	  var mapping = mapfn !== undefined;
+	  var iteratorMethod = getIteratorMethod(O);
+	  var index = 0;
+	  var length, result, step, iterator, next, value;
+	  if (mapping) mapfn = functionBindContext(mapfn, argumentsLength > 2 ? arguments[2] : undefined, 2);
+	  // if the target is not iterable or it's an array with the default iterator - use a simple case
+	  if (iteratorMethod != undefined && !(C == Array && isArrayIteratorMethod(iteratorMethod))) {
+	    iterator = iteratorMethod.call(O);
+	    next = iterator.next;
+	    result = new C();
+	    for (;!(step = next.call(iterator)).done; index++) {
+	      value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value;
+	      createProperty(result, index, value);
+	    }
+	  } else {
+	    length = toLength(O.length);
+	    result = new C(length);
+	    for (;length > index; index++) {
+	      value = mapping ? mapfn(O[index], index) : O[index];
+	      createProperty(result, index, value);
+	    }
 	  }
-	  object.requestAnimationFrame = raf;
-	  object.cancelAnimationFrame = caf;
+	  result.length = index;
+	  return result;
 	};
-	raf_1.cancel = cancel;
-	raf_1.polyfill = polyfill$f;
 
-	var global$1 = (function(self) {
-	  return self
-	  // eslint-disable-next-line no-invalid-this
-	})(typeof self !== 'undefined' ? self : undefined);
-	var support = {
-	  searchParams: 'URLSearchParams' in global$1,
-	  iterable: 'Symbol' in global$1 && 'iterator' in Symbol,
-	  blob:
-	    'FileReader' in global$1 &&
-	    'Blob' in global$1 &&
-	    (function() {
-	      try {
-	        new Blob();
-	        return true
-	      } catch (e) {
-	        return false
+	// based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js
+	var maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1
+	var base = 36;
+	var tMin = 1;
+	var tMax = 26;
+	var skew = 38;
+	var damp = 700;
+	var initialBias = 72;
+	var initialN = 128; // 0x80
+	var delimiter = '-'; // '\x2D'
+	var regexNonASCII = /[^\0-\u007E]/; // non-ASCII chars
+	var regexSeparators = /[.\u3002\uFF0E\uFF61]/g; // RFC 3490 separators
+	var OVERFLOW_ERROR = 'Overflow: input needs wider integers to process';
+	var baseMinusTMin = base - tMin;
+	var floor$4 = Math.floor;
+	var stringFromCharCode = String.fromCharCode;
+
+	/**
+	 * Creates an array containing the numeric code points of each Unicode
+	 * character in the string. While JavaScript uses UCS-2 internally,
+	 * this function will convert a pair of surrogate halves (each of which
+	 * UCS-2 exposes as separate characters) into a single code point,
+	 * matching UTF-16.
+	 */
+	var ucs2decode = function (string) {
+	  var output = [];
+	  var counter = 0;
+	  var length = string.length;
+	  while (counter < length) {
+	    var value = string.charCodeAt(counter++);
+	    if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
+	      // It's a high surrogate, and there is a next character.
+	      var extra = string.charCodeAt(counter++);
+	      if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.
+	        output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
+	      } else {
+	        // It's an unmatched surrogate; only append this code unit, in case the
+	        // next code unit is the high surrogate of a surrogate pair.
+	        output.push(value);
+	        counter--;
 	      }
-	    })(),
-	  formData: 'FormData' in global$1,
-	  arrayBuffer: 'ArrayBuffer' in global$1
+	    } else {
+	      output.push(value);
+	    }
+	  }
+	  return output;
 	};
 
-	function isDataView(obj) {
-	  return obj && DataView.prototype.isPrototypeOf(obj)
-	}
+	/**
+	 * Converts a digit/integer into a basic code point.
+	 */
+	var digitToBasic = function (digit) {
+	  //  0..25 map to ASCII a..z or A..Z
+	  // 26..35 map to ASCII 0..9
+	  return digit + 22 + 75 * (digit < 26);
+	};
 
-	if (support.arrayBuffer) {
-	  var viewClasses = [
-	    '[object Int8Array]',
-	    '[object Uint8Array]',
-	    '[object Uint8ClampedArray]',
-	    '[object Int16Array]',
-	    '[object Uint16Array]',
-	    '[object Int32Array]',
-	    '[object Uint32Array]',
-	    '[object Float32Array]',
-	    '[object Float64Array]'
-	  ];
+	/**
+	 * Bias adaptation function as per section 3.4 of RFC 3492.
+	 * https://tools.ietf.org/html/rfc3492#section-3.4
+	 */
+	var adapt = function (delta, numPoints, firstTime) {
+	  var k = 0;
+	  delta = firstTime ? floor$4(delta / damp) : delta >> 1;
+	  delta += floor$4(delta / numPoints);
+	  for (; delta > baseMinusTMin * tMax >> 1; k += base) {
+	    delta = floor$4(delta / baseMinusTMin);
+	  }
+	  return floor$4(k + (baseMinusTMin + 1) * delta / (delta + skew));
+	};
 
-	  var isArrayBufferView =
-	    ArrayBuffer.isView ||
-	    function(obj) {
-	      return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1
-	    };
-	}
+	/**
+	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
+	 * Punycode string of ASCII-only symbols.
+	 */
+	// eslint-disable-next-line  max-statements
+	var encode = function (input) {
+	  var output = [];
 
-	function normalizeName(name) {
-	  if (typeof name !== 'string') {
-	    name = String(name);
-	  }
-	  if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
-	    throw new TypeError('Invalid character in header field name')
+	  // Convert the input in UCS-2 to an array of Unicode code points.
+	  input = ucs2decode(input);
+
+	  // Cache the length.
+	  var inputLength = input.length;
+
+	  // Initialize the state.
+	  var n = initialN;
+	  var delta = 0;
+	  var bias = initialBias;
+	  var i, currentValue;
+
+	  // Handle the basic code points.
+	  for (i = 0; i < input.length; i++) {
+	    currentValue = input[i];
+	    if (currentValue < 0x80) {
+	      output.push(stringFromCharCode(currentValue));
+	    }
 	  }
-	  return name.toLowerCase()
-	}
 
-	function normalizeValue(value) {
-	  if (typeof value !== 'string') {
-	    value = String(value);
+	  var basicLength = output.length; // number of basic code points.
+	  var handledCPCount = basicLength; // number of code points that have been handled;
+
+	  // Finish the basic string with a delimiter unless it's empty.
+	  if (basicLength) {
+	    output.push(delimiter);
 	  }
-	  return value
-	}
 
-	// Build a destructive iterator for the value list
-	function iteratorFor(items) {
-	  var iterator = {
-	    next: function() {
-	      var value = items.shift();
-	      return {done: value === undefined, value: value}
+	  // Main encoding loop:
+	  while (handledCPCount < inputLength) {
+	    // All non-basic code points < n have been handled already. Find the next larger one:
+	    var m = maxInt;
+	    for (i = 0; i < input.length; i++) {
+	      currentValue = input[i];
+	      if (currentValue >= n && currentValue < m) {
+	        m = currentValue;
+	      }
 	    }
-	  };
 
-	  if (support.iterable) {
-	    iterator[Symbol.iterator] = function() {
-	      return iterator
-	    };
-	  }
+	    // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>, but guard against overflow.
+	    var handledCPCountPlusOne = handledCPCount + 1;
+	    if (m - n > floor$4((maxInt - delta) / handledCPCountPlusOne)) {
+	      throw RangeError(OVERFLOW_ERROR);
+	    }
 
-	  return iterator
-	}
+	    delta += (m - n) * handledCPCountPlusOne;
+	    n = m;
 
-	function Headers(headers) {
-	  this.map = {};
+	    for (i = 0; i < input.length; i++) {
+	      currentValue = input[i];
+	      if (currentValue < n && ++delta > maxInt) {
+	        throw RangeError(OVERFLOW_ERROR);
+	      }
+	      if (currentValue == n) {
+	        // Represent delta as a generalized variable-length integer.
+	        var q = delta;
+	        for (var k = base; /* no condition */; k += base) {
+	          var t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+	          if (q < t) break;
+	          var qMinusT = q - t;
+	          var baseMinusT = base - t;
+	          output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT)));
+	          q = floor$4(qMinusT / baseMinusT);
+	        }
+
+	        output.push(stringFromCharCode(digitToBasic(q)));
+	        bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
+	        delta = 0;
+	        ++handledCPCount;
+	      }
+	    }
 
-	  if (headers instanceof Headers) {
-	    headers.forEach(function(value, name) {
-	      this.append(name, value);
-	    }, this);
-	  } else if (Array.isArray(headers)) {
-	    headers.forEach(function(header) {
-	      this.append(header[0], header[1]);
-	    }, this);
-	  } else if (headers) {
-	    Object.getOwnPropertyNames(headers).forEach(function(name) {
-	      this.append(name, headers[name]);
-	    }, this);
+	    ++delta;
+	    ++n;
 	  }
-	}
-
-	Headers.prototype.append = function(name, value) {
-	  name = normalizeName(name);
-	  value = normalizeValue(value);
-	  var oldValue = this.map[name];
-	  this.map[name] = oldValue ? oldValue + ', ' + value : value;
+	  return output.join('');
 	};
 
-	Headers.prototype['delete'] = function(name) {
-	  delete this.map[normalizeName(name)];
+	var stringPunycodeToAscii = function (input) {
+	  var encoded = [];
+	  var labels = input.toLowerCase().replace(regexSeparators, '\u002E').split('.');
+	  var i, label;
+	  for (i = 0; i < labels.length; i++) {
+	    label = labels[i];
+	    encoded.push(regexNonASCII.test(label) ? 'xn--' + encode(label) : label);
+	  }
+	  return encoded.join('.');
 	};
 
-	Headers.prototype.get = function(name) {
-	  name = normalizeName(name);
-	  return this.has(name) ? this.map[name] : null
+	var getIterator = function (it) {
+	  var iteratorMethod = getIteratorMethod(it);
+	  if (typeof iteratorMethod != 'function') {
+	    throw TypeError(String(it) + ' is not iterable');
+	  } return anObject(iteratorMethod.call(it));
 	};
 
-	Headers.prototype.has = function(name) {
-	  return this.map.hasOwnProperty(normalizeName(name))
-	};
+	// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
 
-	Headers.prototype.set = function(name, value) {
-	  this.map[normalizeName(name)] = normalizeValue(value);
-	};
 
-	Headers.prototype.forEach = function(callback, thisArg) {
-	  for (var name in this.map) {
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+	var $fetch$1 = getBuiltIn('fetch');
+	var Headers = getBuiltIn('Headers');
+	var ITERATOR$8 = wellKnownSymbol('iterator');
+	var URL_SEARCH_PARAMS = 'URLSearchParams';
+	var URL_SEARCH_PARAMS_ITERATOR = URL_SEARCH_PARAMS + 'Iterator';
+	var setInternalState$5 = internalState.set;
+	var getInternalParamsState = internalState.getterFor(URL_SEARCH_PARAMS);
+	var getInternalIteratorState = internalState.getterFor(URL_SEARCH_PARAMS_ITERATOR);
+
+	var plus = /\+/g;
+	var sequences = Array(4);
+
+	var percentSequence = function (bytes) {
+	  return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp('((?:%[\\da-f]{2}){' + bytes + '})', 'gi'));
+	};
+
+	var percentDecode = function (sequence) {
+	  try {
+	    return decodeURIComponent(sequence);
+	  } catch (error) {
+	    return sequence;
+	  }
+	};
+
+	var deserialize = function (it) {
+	  var result = it.replace(plus, ' ');
+	  var bytes = 4;
+	  try {
+	    return decodeURIComponent(result);
+	  } catch (error) {
+	    while (bytes) {
+	      result = result.replace(percentSequence(bytes--), percentDecode);
+	    }
+	    return result;
+	  }
+	};
+
+	var find = /[!'()~]|%20/g;
+
+	var replace = {
+	  '!': '%21',
+	  "'": '%27',
+	  '(': '%28',
+	  ')': '%29',
+	  '~': '%7E',
+	  '%20': '+'
+	};
+
+	var replacer = function (match) {
+	  return replace[match];
+	};
+
+	var serialize = function (it) {
+	  return encodeURIComponent(it).replace(find, replacer);
+	};
+
+	var parseSearchParams = function (result, query) {
+	  if (query) {
+	    var attributes = query.split('&');
+	    var index = 0;
+	    var attribute, entry;
+	    while (index < attributes.length) {
+	      attribute = attributes[index++];
+	      if (attribute.length) {
+	        entry = attribute.split('=');
+	        result.push({
+	          key: deserialize(entry.shift()),
+	          value: deserialize(entry.join('='))
+	        });
+	      }
+	    }
+	  }
+	};
+
+	var updateSearchParams = function (query) {
+	  this.entries.length = 0;
+	  parseSearchParams(this.entries, query);
+	};
+
+	var validateArgumentsLength = function (passed, required) {
+	  if (passed < required) throw TypeError('Not enough arguments');
+	};
+
+	var URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {
+	  setInternalState$5(this, {
+	    type: URL_SEARCH_PARAMS_ITERATOR,
+	    iterator: getIterator(getInternalParamsState(params).entries),
+	    kind: kind
+	  });
+	}, 'Iterator', function next() {
+	  var state = getInternalIteratorState(this);
+	  var kind = state.kind;
+	  var step = state.iterator.next();
+	  var entry = step.value;
+	  if (!step.done) {
+	    step.value = kind === 'keys' ? entry.key : kind === 'values' ? entry.value : [entry.key, entry.value];
+	  } return step;
+	});
+
+	// `URLSearchParams` constructor
+	// https://url.spec.whatwg.org/#interface-urlsearchparams
+	var URLSearchParamsConstructor = function URLSearchParams(/* init */) {
+	  anInstance(this, URLSearchParamsConstructor, URL_SEARCH_PARAMS);
+	  var init = arguments.length > 0 ? arguments[0] : undefined;
+	  var that = this;
+	  var entries = [];
+	  var iteratorMethod, iterator, next, step, entryIterator, entryNext, first, second, key;
+
+	  setInternalState$5(that, {
+	    type: URL_SEARCH_PARAMS,
+	    entries: entries,
+	    updateURL: function () { /* empty */ },
+	    updateSearchParams: updateSearchParams
+	  });
+
+	  if (init !== undefined) {
+	    if (isObject(init)) {
+	      iteratorMethod = getIteratorMethod(init);
+	      if (typeof iteratorMethod === 'function') {
+	        iterator = iteratorMethod.call(init);
+	        next = iterator.next;
+	        while (!(step = next.call(iterator)).done) {
+	          entryIterator = getIterator(anObject(step.value));
+	          entryNext = entryIterator.next;
+	          if (
+	            (first = entryNext.call(entryIterator)).done ||
+	            (second = entryNext.call(entryIterator)).done ||
+	            !entryNext.call(entryIterator).done
+	          ) throw TypeError('Expected sequence with length 2');
+	          entries.push({ key: first.value + '', value: second.value + '' });
+	        }
+	      } else for (key in init) if (has(init, key)) entries.push({ key: key, value: init[key] + '' });
+	    } else {
+	      parseSearchParams(entries, typeof init === 'string' ? init.charAt(0) === '?' ? init.slice(1) : init : init + '');
+	    }
+	  }
+	};
+
+	var URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;
+
+	redefineAll(URLSearchParamsPrototype, {
+	  // `URLSearchParams.prototype.appent` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-append
+	  append: function append(name, value) {
+	    validateArgumentsLength(arguments.length, 2);
+	    var state = getInternalParamsState(this);
+	    state.entries.push({ key: name + '', value: value + '' });
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.delete` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-delete
+	  'delete': function (name) {
+	    validateArgumentsLength(arguments.length, 1);
+	    var state = getInternalParamsState(this);
+	    var entries = state.entries;
+	    var key = name + '';
+	    var index = 0;
+	    while (index < entries.length) {
+	      if (entries[index].key === key) entries.splice(index, 1);
+	      else index++;
+	    }
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.get` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-get
+	  get: function get(name) {
+	    validateArgumentsLength(arguments.length, 1);
+	    var entries = getInternalParamsState(this).entries;
+	    var key = name + '';
+	    var index = 0;
+	    for (; index < entries.length; index++) {
+	      if (entries[index].key === key) return entries[index].value;
+	    }
+	    return null;
+	  },
+	  // `URLSearchParams.prototype.getAll` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-getall
+	  getAll: function getAll(name) {
+	    validateArgumentsLength(arguments.length, 1);
+	    var entries = getInternalParamsState(this).entries;
+	    var key = name + '';
+	    var result = [];
+	    var index = 0;
+	    for (; index < entries.length; index++) {
+	      if (entries[index].key === key) result.push(entries[index].value);
+	    }
+	    return result;
+	  },
+	  // `URLSearchParams.prototype.has` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-has
+	  has: function has(name) {
+	    validateArgumentsLength(arguments.length, 1);
+	    var entries = getInternalParamsState(this).entries;
+	    var key = name + '';
+	    var index = 0;
+	    while (index < entries.length) {
+	      if (entries[index++].key === key) return true;
+	    }
+	    return false;
+	  },
+	  // `URLSearchParams.prototype.set` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-set
+	  set: function set(name, value) {
+	    validateArgumentsLength(arguments.length, 1);
+	    var state = getInternalParamsState(this);
+	    var entries = state.entries;
+	    var found = false;
+	    var key = name + '';
+	    var val = value + '';
+	    var index = 0;
+	    var entry;
+	    for (; index < entries.length; index++) {
+	      entry = entries[index];
+	      if (entry.key === key) {
+	        if (found) entries.splice(index--, 1);
+	        else {
+	          found = true;
+	          entry.value = val;
+	        }
+	      }
+	    }
+	    if (!found) entries.push({ key: key, value: val });
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.sort` method
+	  // https://url.spec.whatwg.org/#dom-urlsearchparams-sort
+	  sort: function sort() {
+	    var state = getInternalParamsState(this);
+	    var entries = state.entries;
+	    // Array#sort is not stable in some engines
+	    var slice = entries.slice();
+	    var entry, entriesIndex, sliceIndex;
+	    entries.length = 0;
+	    for (sliceIndex = 0; sliceIndex < slice.length; sliceIndex++) {
+	      entry = slice[sliceIndex];
+	      for (entriesIndex = 0; entriesIndex < sliceIndex; entriesIndex++) {
+	        if (entries[entriesIndex].key > entry.key) {
+	          entries.splice(entriesIndex, 0, entry);
+	          break;
+	        }
+	      }
+	      if (entriesIndex === sliceIndex) entries.push(entry);
+	    }
+	    state.updateURL();
+	  },
+	  // `URLSearchParams.prototype.forEach` method
+	  forEach: function forEach(callback /* , thisArg */) {
+	    var entries = getInternalParamsState(this).entries;
+	    var boundFunction = functionBindContext(callback, arguments.length > 1 ? arguments[1] : undefined, 3);
+	    var index = 0;
+	    var entry;
+	    while (index < entries.length) {
+	      entry = entries[index++];
+	      boundFunction(entry.value, entry.key, this);
+	    }
+	  },
+	  // `URLSearchParams.prototype.keys` method
+	  keys: function keys() {
+	    return new URLSearchParamsIterator(this, 'keys');
+	  },
+	  // `URLSearchParams.prototype.values` method
+	  values: function values() {
+	    return new URLSearchParamsIterator(this, 'values');
+	  },
+	  // `URLSearchParams.prototype.entries` method
+	  entries: function entries() {
+	    return new URLSearchParamsIterator(this, 'entries');
+	  }
+	}, { enumerable: true });
+
+	// `URLSearchParams.prototype[@@iterator]` method
+	redefine(URLSearchParamsPrototype, ITERATOR$8, URLSearchParamsPrototype.entries);
+
+	// `URLSearchParams.prototype.toString` method
+	// https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior
+	redefine(URLSearchParamsPrototype, 'toString', function toString() {
+	  var entries = getInternalParamsState(this).entries;
+	  var result = [];
+	  var index = 0;
+	  var entry;
+	  while (index < entries.length) {
+	    entry = entries[index++];
+	    result.push(serialize(entry.key) + '=' + serialize(entry.value));
+	  } return result.join('&');
+	}, { enumerable: true });
+
+	setToStringTag(URLSearchParamsConstructor, URL_SEARCH_PARAMS);
+
+	_export({ global: true, forced: !nativeUrl }, {
+	  URLSearchParams: URLSearchParamsConstructor
+	});
+
+	// Wrap `fetch` for correct work with polyfilled `URLSearchParams`
+	// https://github.com/zloirock/core-js/issues/674
+	if (!nativeUrl && typeof $fetch$1 == 'function' && typeof Headers == 'function') {
+	  _export({ global: true, enumerable: true, forced: true }, {
+	    fetch: function fetch(input /* , init */) {
+	      var args = [input];
+	      var init, body, headers;
+	      if (arguments.length > 1) {
+	        init = arguments[1];
+	        if (isObject(init)) {
+	          body = init.body;
+	          if (classof(body) === URL_SEARCH_PARAMS) {
+	            headers = init.headers ? new Headers(init.headers) : new Headers();
+	            if (!headers.has('content-type')) {
+	              headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
+	            }
+	            init = objectCreate(init, {
+	              body: createPropertyDescriptor(0, String(body)),
+	              headers: createPropertyDescriptor(0, headers)
+	            });
+	          }
+	        }
+	        args.push(init);
+	      } return $fetch$1.apply(this, args);
+	    }
+	  });
+	}
+
+	var web_urlSearchParams = {
+	  URLSearchParams: URLSearchParamsConstructor,
+	  getState: getInternalParamsState
+	};
+
+	// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
+
+
+
+
+
+
+
+
+
+
+
+	var codeAt = stringMultibyte.codeAt;
+
+
+
+
+
+	var NativeURL = global_1.URL;
+	var URLSearchParams$1 = web_urlSearchParams.URLSearchParams;
+	var getInternalSearchParamsState = web_urlSearchParams.getState;
+	var setInternalState$6 = internalState.set;
+	var getInternalURLState = internalState.getterFor('URL');
+	var floor$5 = Math.floor;
+	var pow$1 = Math.pow;
+
+	var INVALID_AUTHORITY = 'Invalid authority';
+	var INVALID_SCHEME = 'Invalid scheme';
+	var INVALID_HOST = 'Invalid host';
+	var INVALID_PORT = 'Invalid port';
+
+	var ALPHA = /[A-Za-z]/;
+	var ALPHANUMERIC = /[\d+-.A-Za-z]/;
+	var DIGIT = /\d/;
+	var HEX_START = /^(0x|0X)/;
+	var OCT = /^[0-7]+$/;
+	var DEC = /^\d+$/;
+	var HEX = /^[\dA-Fa-f]+$/;
+	// eslint-disable-next-line no-control-regex
+	var FORBIDDEN_HOST_CODE_POINT = /[\u0000\u0009\u000A\u000D #%/:?@[\\]]/;
+	// eslint-disable-next-line no-control-regex
+	var FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\u0000\u0009\u000A\u000D #/:?@[\\]]/;
+	// eslint-disable-next-line no-control-regex
+	var LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\u0000-\u001F ]+|[\u0000-\u001F ]+$/g;
+	// eslint-disable-next-line no-control-regex
+	var TAB_AND_NEW_LINE = /[\u0009\u000A\u000D]/g;
+	var EOF;
+
+	var parseHost = function (url, input) {
+	  var result, codePoints, index;
+	  if (input.charAt(0) == '[') {
+	    if (input.charAt(input.length - 1) != ']') return INVALID_HOST;
+	    result = parseIPv6(input.slice(1, -1));
+	    if (!result) return INVALID_HOST;
+	    url.host = result;
+	  // opaque host
+	  } else if (!isSpecial(url)) {
+	    if (FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT.test(input)) return INVALID_HOST;
+	    result = '';
+	    codePoints = arrayFrom(input);
+	    for (index = 0; index < codePoints.length; index++) {
+	      result += percentEncode(codePoints[index], C0ControlPercentEncodeSet);
+	    }
+	    url.host = result;
+	  } else {
+	    input = stringPunycodeToAscii(input);
+	    if (FORBIDDEN_HOST_CODE_POINT.test(input)) return INVALID_HOST;
+	    result = parseIPv4(input);
+	    if (result === null) return INVALID_HOST;
+	    url.host = result;
+	  }
+	};
+
+	var parseIPv4 = function (input) {
+	  var parts = input.split('.');
+	  var partsLength, numbers, index, part, radix, number, ipv4;
+	  if (parts.length && parts[parts.length - 1] == '') {
+	    parts.pop();
+	  }
+	  partsLength = parts.length;
+	  if (partsLength > 4) return input;
+	  numbers = [];
+	  for (index = 0; index < partsLength; index++) {
+	    part = parts[index];
+	    if (part == '') return input;
+	    radix = 10;
+	    if (part.length > 1 && part.charAt(0) == '0') {
+	      radix = HEX_START.test(part) ? 16 : 8;
+	      part = part.slice(radix == 8 ? 1 : 2);
+	    }
+	    if (part === '') {
+	      number = 0;
+	    } else {
+	      if (!(radix == 10 ? DEC : radix == 8 ? OCT : HEX).test(part)) return input;
+	      number = parseInt(part, radix);
+	    }
+	    numbers.push(number);
+	  }
+	  for (index = 0; index < partsLength; index++) {
+	    number = numbers[index];
+	    if (index == partsLength - 1) {
+	      if (number >= pow$1(256, 5 - partsLength)) return null;
+	    } else if (number > 255) return null;
+	  }
+	  ipv4 = numbers.pop();
+	  for (index = 0; index < numbers.length; index++) {
+	    ipv4 += numbers[index] * pow$1(256, 3 - index);
+	  }
+	  return ipv4;
+	};
+
+	// eslint-disable-next-line max-statements
+	var parseIPv6 = function (input) {
+	  var address = [0, 0, 0, 0, 0, 0, 0, 0];
+	  var pieceIndex = 0;
+	  var compress = null;
+	  var pointer = 0;
+	  var value, length, numbersSeen, ipv4Piece, number, swaps, swap;
+
+	  var char = function () {
+	    return input.charAt(pointer);
+	  };
+
+	  if (char() == ':') {
+	    if (input.charAt(1) != ':') return;
+	    pointer += 2;
+	    pieceIndex++;
+	    compress = pieceIndex;
+	  }
+	  while (char()) {
+	    if (pieceIndex == 8) return;
+	    if (char() == ':') {
+	      if (compress !== null) return;
+	      pointer++;
+	      pieceIndex++;
+	      compress = pieceIndex;
+	      continue;
+	    }
+	    value = length = 0;
+	    while (length < 4 && HEX.test(char())) {
+	      value = value * 16 + parseInt(char(), 16);
+	      pointer++;
+	      length++;
+	    }
+	    if (char() == '.') {
+	      if (length == 0) return;
+	      pointer -= length;
+	      if (pieceIndex > 6) return;
+	      numbersSeen = 0;
+	      while (char()) {
+	        ipv4Piece = null;
+	        if (numbersSeen > 0) {
+	          if (char() == '.' && numbersSeen < 4) pointer++;
+	          else return;
+	        }
+	        if (!DIGIT.test(char())) return;
+	        while (DIGIT.test(char())) {
+	          number = parseInt(char(), 10);
+	          if (ipv4Piece === null) ipv4Piece = number;
+	          else if (ipv4Piece == 0) return;
+	          else ipv4Piece = ipv4Piece * 10 + number;
+	          if (ipv4Piece > 255) return;
+	          pointer++;
+	        }
+	        address[pieceIndex] = address[pieceIndex] * 256 + ipv4Piece;
+	        numbersSeen++;
+	        if (numbersSeen == 2 || numbersSeen == 4) pieceIndex++;
+	      }
+	      if (numbersSeen != 4) return;
+	      break;
+	    } else if (char() == ':') {
+	      pointer++;
+	      if (!char()) return;
+	    } else if (char()) return;
+	    address[pieceIndex++] = value;
+	  }
+	  if (compress !== null) {
+	    swaps = pieceIndex - compress;
+	    pieceIndex = 7;
+	    while (pieceIndex != 0 && swaps > 0) {
+	      swap = address[pieceIndex];
+	      address[pieceIndex--] = address[compress + swaps - 1];
+	      address[compress + --swaps] = swap;
+	    }
+	  } else if (pieceIndex != 8) return;
+	  return address;
+	};
+
+	var findLongestZeroSequence = function (ipv6) {
+	  var maxIndex = null;
+	  var maxLength = 1;
+	  var currStart = null;
+	  var currLength = 0;
+	  var index = 0;
+	  for (; index < 8; index++) {
+	    if (ipv6[index] !== 0) {
+	      if (currLength > maxLength) {
+	        maxIndex = currStart;
+	        maxLength = currLength;
+	      }
+	      currStart = null;
+	      currLength = 0;
+	    } else {
+	      if (currStart === null) currStart = index;
+	      ++currLength;
+	    }
+	  }
+	  if (currLength > maxLength) {
+	    maxIndex = currStart;
+	    maxLength = currLength;
+	  }
+	  return maxIndex;
+	};
+
+	var serializeHost = function (host) {
+	  var result, index, compress, ignore0;
+	  // ipv4
+	  if (typeof host == 'number') {
+	    result = [];
+	    for (index = 0; index < 4; index++) {
+	      result.unshift(host % 256);
+	      host = floor$5(host / 256);
+	    } return result.join('.');
+	  // ipv6
+	  } else if (typeof host == 'object') {
+	    result = '';
+	    compress = findLongestZeroSequence(host);
+	    for (index = 0; index < 8; index++) {
+	      if (ignore0 && host[index] === 0) continue;
+	      if (ignore0) ignore0 = false;
+	      if (compress === index) {
+	        result += index ? ':' : '::';
+	        ignore0 = true;
+	      } else {
+	        result += host[index].toString(16);
+	        if (index < 7) result += ':';
+	      }
+	    }
+	    return '[' + result + ']';
+	  } return host;
+	};
+
+	var C0ControlPercentEncodeSet = {};
+	var fragmentPercentEncodeSet = objectAssign({}, C0ControlPercentEncodeSet, {
+	  ' ': 1, '"': 1, '<': 1, '>': 1, '`': 1
+	});
+	var pathPercentEncodeSet = objectAssign({}, fragmentPercentEncodeSet, {
+	  '#': 1, '?': 1, '{': 1, '}': 1
+	});
+	var userinfoPercentEncodeSet = objectAssign({}, pathPercentEncodeSet, {
+	  '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\': 1, ']': 1, '^': 1, '|': 1
+	});
+
+	var percentEncode = function (char, set) {
+	  var code = codeAt(char, 0);
+	  return code > 0x20 && code < 0x7F && !has(set, char) ? char : encodeURIComponent(char);
+	};
+
+	var specialSchemes = {
+	  ftp: 21,
+	  file: null,
+	  http: 80,
+	  https: 443,
+	  ws: 80,
+	  wss: 443
+	};
+
+	var isSpecial = function (url) {
+	  return has(specialSchemes, url.scheme);
+	};
+
+	var includesCredentials = function (url) {
+	  return url.username != '' || url.password != '';
+	};
+
+	var cannotHaveUsernamePasswordPort = function (url) {
+	  return !url.host || url.cannotBeABaseURL || url.scheme == 'file';
+	};
+
+	var isWindowsDriveLetter = function (string, normalized) {
+	  var second;
+	  return string.length == 2 && ALPHA.test(string.charAt(0))
+	    && ((second = string.charAt(1)) == ':' || (!normalized && second == '|'));
+	};
+
+	var startsWithWindowsDriveLetter = function (string) {
+	  var third;
+	  return string.length > 1 && isWindowsDriveLetter(string.slice(0, 2)) && (
+	    string.length == 2 ||
+	    ((third = string.charAt(2)) === '/' || third === '\\' || third === '?' || third === '#')
+	  );
+	};
+
+	var shortenURLsPath = function (url) {
+	  var path = url.path;
+	  var pathSize = path.length;
+	  if (pathSize && (url.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {
+	    path.pop();
+	  }
+	};
+
+	var isSingleDot = function (segment) {
+	  return segment === '.' || segment.toLowerCase() === '%2e';
+	};
+
+	var isDoubleDot = function (segment) {
+	  segment = segment.toLowerCase();
+	  return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';
+	};
+
+	// States:
+	var SCHEME_START = {};
+	var SCHEME = {};
+	var NO_SCHEME = {};
+	var SPECIAL_RELATIVE_OR_AUTHORITY = {};
+	var PATH_OR_AUTHORITY = {};
+	var RELATIVE = {};
+	var RELATIVE_SLASH = {};
+	var SPECIAL_AUTHORITY_SLASHES = {};
+	var SPECIAL_AUTHORITY_IGNORE_SLASHES = {};
+	var AUTHORITY = {};
+	var HOST = {};
+	var HOSTNAME = {};
+	var PORT = {};
+	var FILE = {};
+	var FILE_SLASH = {};
+	var FILE_HOST = {};
+	var PATH_START = {};
+	var PATH = {};
+	var CANNOT_BE_A_BASE_URL_PATH = {};
+	var QUERY = {};
+	var FRAGMENT = {};
+
+	// eslint-disable-next-line max-statements
+	var parseURL = function (url, input, stateOverride, base) {
+	  var state = stateOverride || SCHEME_START;
+	  var pointer = 0;
+	  var buffer = '';
+	  var seenAt = false;
+	  var seenBracket = false;
+	  var seenPasswordToken = false;
+	  var codePoints, char, bufferCodePoints, failure;
+
+	  if (!stateOverride) {
+	    url.scheme = '';
+	    url.username = '';
+	    url.password = '';
+	    url.host = null;
+	    url.port = null;
+	    url.path = [];
+	    url.query = null;
+	    url.fragment = null;
+	    url.cannotBeABaseURL = false;
+	    input = input.replace(LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE, '');
+	  }
+
+	  input = input.replace(TAB_AND_NEW_LINE, '');
+
+	  codePoints = arrayFrom(input);
+
+	  while (pointer <= codePoints.length) {
+	    char = codePoints[pointer];
+	    switch (state) {
+	      case SCHEME_START:
+	        if (char && ALPHA.test(char)) {
+	          buffer += char.toLowerCase();
+	          state = SCHEME;
+	        } else if (!stateOverride) {
+	          state = NO_SCHEME;
+	          continue;
+	        } else return INVALID_SCHEME;
+	        break;
+
+	      case SCHEME:
+	        if (char && (ALPHANUMERIC.test(char) || char == '+' || char == '-' || char == '.')) {
+	          buffer += char.toLowerCase();
+	        } else if (char == ':') {
+	          if (stateOverride && (
+	            (isSpecial(url) != has(specialSchemes, buffer)) ||
+	            (buffer == 'file' && (includesCredentials(url) || url.port !== null)) ||
+	            (url.scheme == 'file' && !url.host)
+	          )) return;
+	          url.scheme = buffer;
+	          if (stateOverride) {
+	            if (isSpecial(url) && specialSchemes[url.scheme] == url.port) url.port = null;
+	            return;
+	          }
+	          buffer = '';
+	          if (url.scheme == 'file') {
+	            state = FILE;
+	          } else if (isSpecial(url) && base && base.scheme == url.scheme) {
+	            state = SPECIAL_RELATIVE_OR_AUTHORITY;
+	          } else if (isSpecial(url)) {
+	            state = SPECIAL_AUTHORITY_SLASHES;
+	          } else if (codePoints[pointer + 1] == '/') {
+	            state = PATH_OR_AUTHORITY;
+	            pointer++;
+	          } else {
+	            url.cannotBeABaseURL = true;
+	            url.path.push('');
+	            state = CANNOT_BE_A_BASE_URL_PATH;
+	          }
+	        } else if (!stateOverride) {
+	          buffer = '';
+	          state = NO_SCHEME;
+	          pointer = 0;
+	          continue;
+	        } else return INVALID_SCHEME;
+	        break;
+
+	      case NO_SCHEME:
+	        if (!base || (base.cannotBeABaseURL && char != '#')) return INVALID_SCHEME;
+	        if (base.cannotBeABaseURL && char == '#') {
+	          url.scheme = base.scheme;
+	          url.path = base.path.slice();
+	          url.query = base.query;
+	          url.fragment = '';
+	          url.cannotBeABaseURL = true;
+	          state = FRAGMENT;
+	          break;
+	        }
+	        state = base.scheme == 'file' ? FILE : RELATIVE;
+	        continue;
+
+	      case SPECIAL_RELATIVE_OR_AUTHORITY:
+	        if (char == '/' && codePoints[pointer + 1] == '/') {
+	          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+	          pointer++;
+	        } else {
+	          state = RELATIVE;
+	          continue;
+	        } break;
+
+	      case PATH_OR_AUTHORITY:
+	        if (char == '/') {
+	          state = AUTHORITY;
+	          break;
+	        } else {
+	          state = PATH;
+	          continue;
+	        }
+
+	      case RELATIVE:
+	        url.scheme = base.scheme;
+	        if (char == EOF) {
+	          url.username = base.username;
+	          url.password = base.password;
+	          url.host = base.host;
+	          url.port = base.port;
+	          url.path = base.path.slice();
+	          url.query = base.query;
+	        } else if (char == '/' || (char == '\\' && isSpecial(url))) {
+	          state = RELATIVE_SLASH;
+	        } else if (char == '?') {
+	          url.username = base.username;
+	          url.password = base.password;
+	          url.host = base.host;
+	          url.port = base.port;
+	          url.path = base.path.slice();
+	          url.query = '';
+	          state = QUERY;
+	        } else if (char == '#') {
+	          url.username = base.username;
+	          url.password = base.password;
+	          url.host = base.host;
+	          url.port = base.port;
+	          url.path = base.path.slice();
+	          url.query = base.query;
+	          url.fragment = '';
+	          state = FRAGMENT;
+	        } else {
+	          url.username = base.username;
+	          url.password = base.password;
+	          url.host = base.host;
+	          url.port = base.port;
+	          url.path = base.path.slice();
+	          url.path.pop();
+	          state = PATH;
+	          continue;
+	        } break;
+
+	      case RELATIVE_SLASH:
+	        if (isSpecial(url) && (char == '/' || char == '\\')) {
+	          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+	        } else if (char == '/') {
+	          state = AUTHORITY;
+	        } else {
+	          url.username = base.username;
+	          url.password = base.password;
+	          url.host = base.host;
+	          url.port = base.port;
+	          state = PATH;
+	          continue;
+	        } break;
+
+	      case SPECIAL_AUTHORITY_SLASHES:
+	        state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+	        if (char != '/' || buffer.charAt(pointer + 1) != '/') continue;
+	        pointer++;
+	        break;
+
+	      case SPECIAL_AUTHORITY_IGNORE_SLASHES:
+	        if (char != '/' && char != '\\') {
+	          state = AUTHORITY;
+	          continue;
+	        } break;
+
+	      case AUTHORITY:
+	        if (char == '@') {
+	          if (seenAt) buffer = '%40' + buffer;
+	          seenAt = true;
+	          bufferCodePoints = arrayFrom(buffer);
+	          for (var i = 0; i < bufferCodePoints.length; i++) {
+	            var codePoint = bufferCodePoints[i];
+	            if (codePoint == ':' && !seenPasswordToken) {
+	              seenPasswordToken = true;
+	              continue;
+	            }
+	            var encodedCodePoints = percentEncode(codePoint, userinfoPercentEncodeSet);
+	            if (seenPasswordToken) url.password += encodedCodePoints;
+	            else url.username += encodedCodePoints;
+	          }
+	          buffer = '';
+	        } else if (
+	          char == EOF || char == '/' || char == '?' || char == '#' ||
+	          (char == '\\' && isSpecial(url))
+	        ) {
+	          if (seenAt && buffer == '') return INVALID_AUTHORITY;
+	          pointer -= arrayFrom(buffer).length + 1;
+	          buffer = '';
+	          state = HOST;
+	        } else buffer += char;
+	        break;
+
+	      case HOST:
+	      case HOSTNAME:
+	        if (stateOverride && url.scheme == 'file') {
+	          state = FILE_HOST;
+	          continue;
+	        } else if (char == ':' && !seenBracket) {
+	          if (buffer == '') return INVALID_HOST;
+	          failure = parseHost(url, buffer);
+	          if (failure) return failure;
+	          buffer = '';
+	          state = PORT;
+	          if (stateOverride == HOSTNAME) return;
+	        } else if (
+	          char == EOF || char == '/' || char == '?' || char == '#' ||
+	          (char == '\\' && isSpecial(url))
+	        ) {
+	          if (isSpecial(url) && buffer == '') return INVALID_HOST;
+	          if (stateOverride && buffer == '' && (includesCredentials(url) || url.port !== null)) return;
+	          failure = parseHost(url, buffer);
+	          if (failure) return failure;
+	          buffer = '';
+	          state = PATH_START;
+	          if (stateOverride) return;
+	          continue;
+	        } else {
+	          if (char == '[') seenBracket = true;
+	          else if (char == ']') seenBracket = false;
+	          buffer += char;
+	        } break;
+
+	      case PORT:
+	        if (DIGIT.test(char)) {
+	          buffer += char;
+	        } else if (
+	          char == EOF || char == '/' || char == '?' || char == '#' ||
+	          (char == '\\' && isSpecial(url)) ||
+	          stateOverride
+	        ) {
+	          if (buffer != '') {
+	            var port = parseInt(buffer, 10);
+	            if (port > 0xFFFF) return INVALID_PORT;
+	            url.port = (isSpecial(url) && port === specialSchemes[url.scheme]) ? null : port;
+	            buffer = '';
+	          }
+	          if (stateOverride) return;
+	          state = PATH_START;
+	          continue;
+	        } else return INVALID_PORT;
+	        break;
+
+	      case FILE:
+	        url.scheme = 'file';
+	        if (char == '/' || char == '\\') state = FILE_SLASH;
+	        else if (base && base.scheme == 'file') {
+	          if (char == EOF) {
+	            url.host = base.host;
+	            url.path = base.path.slice();
+	            url.query = base.query;
+	          } else if (char == '?') {
+	            url.host = base.host;
+	            url.path = base.path.slice();
+	            url.query = '';
+	            state = QUERY;
+	          } else if (char == '#') {
+	            url.host = base.host;
+	            url.path = base.path.slice();
+	            url.query = base.query;
+	            url.fragment = '';
+	            state = FRAGMENT;
+	          } else {
+	            if (!startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {
+	              url.host = base.host;
+	              url.path = base.path.slice();
+	              shortenURLsPath(url);
+	            }
+	            state = PATH;
+	            continue;
+	          }
+	        } else {
+	          state = PATH;
+	          continue;
+	        } break;
+
+	      case FILE_SLASH:
+	        if (char == '/' || char == '\\') {
+	          state = FILE_HOST;
+	          break;
+	        }
+	        if (base && base.scheme == 'file' && !startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {
+	          if (isWindowsDriveLetter(base.path[0], true)) url.path.push(base.path[0]);
+	          else url.host = base.host;
+	        }
+	        state = PATH;
+	        continue;
+
+	      case FILE_HOST:
+	        if (char == EOF || char == '/' || char == '\\' || char == '?' || char == '#') {
+	          if (!stateOverride && isWindowsDriveLetter(buffer)) {
+	            state = PATH;
+	          } else if (buffer == '') {
+	            url.host = '';
+	            if (stateOverride) return;
+	            state = PATH_START;
+	          } else {
+	            failure = parseHost(url, buffer);
+	            if (failure) return failure;
+	            if (url.host == 'localhost') url.host = '';
+	            if (stateOverride) return;
+	            buffer = '';
+	            state = PATH_START;
+	          } continue;
+	        } else buffer += char;
+	        break;
+
+	      case PATH_START:
+	        if (isSpecial(url)) {
+	          state = PATH;
+	          if (char != '/' && char != '\\') continue;
+	        } else if (!stateOverride && char == '?') {
+	          url.query = '';
+	          state = QUERY;
+	        } else if (!stateOverride && char == '#') {
+	          url.fragment = '';
+	          state = FRAGMENT;
+	        } else if (char != EOF) {
+	          state = PATH;
+	          if (char != '/') continue;
+	        } break;
+
+	      case PATH:
+	        if (
+	          char == EOF || char == '/' ||
+	          (char == '\\' && isSpecial(url)) ||
+	          (!stateOverride && (char == '?' || char == '#'))
+	        ) {
+	          if (isDoubleDot(buffer)) {
+	            shortenURLsPath(url);
+	            if (char != '/' && !(char == '\\' && isSpecial(url))) {
+	              url.path.push('');
+	            }
+	          } else if (isSingleDot(buffer)) {
+	            if (char != '/' && !(char == '\\' && isSpecial(url))) {
+	              url.path.push('');
+	            }
+	          } else {
+	            if (url.scheme == 'file' && !url.path.length && isWindowsDriveLetter(buffer)) {
+	              if (url.host) url.host = '';
+	              buffer = buffer.charAt(0) + ':'; // normalize windows drive letter
+	            }
+	            url.path.push(buffer);
+	          }
+	          buffer = '';
+	          if (url.scheme == 'file' && (char == EOF || char == '?' || char == '#')) {
+	            while (url.path.length > 1 && url.path[0] === '') {
+	              url.path.shift();
+	            }
+	          }
+	          if (char == '?') {
+	            url.query = '';
+	            state = QUERY;
+	          } else if (char == '#') {
+	            url.fragment = '';
+	            state = FRAGMENT;
+	          }
+	        } else {
+	          buffer += percentEncode(char, pathPercentEncodeSet);
+	        } break;
+
+	      case CANNOT_BE_A_BASE_URL_PATH:
+	        if (char == '?') {
+	          url.query = '';
+	          state = QUERY;
+	        } else if (char == '#') {
+	          url.fragment = '';
+	          state = FRAGMENT;
+	        } else if (char != EOF) {
+	          url.path[0] += percentEncode(char, C0ControlPercentEncodeSet);
+	        } break;
+
+	      case QUERY:
+	        if (!stateOverride && char == '#') {
+	          url.fragment = '';
+	          state = FRAGMENT;
+	        } else if (char != EOF) {
+	          if (char == "'" && isSpecial(url)) url.query += '%27';
+	          else if (char == '#') url.query += '%23';
+	          else url.query += percentEncode(char, C0ControlPercentEncodeSet);
+	        } break;
+
+	      case FRAGMENT:
+	        if (char != EOF) url.fragment += percentEncode(char, fragmentPercentEncodeSet);
+	        break;
+	    }
+
+	    pointer++;
+	  }
+	};
+
+	// `URL` constructor
+	// https://url.spec.whatwg.org/#url-class
+	var URLConstructor = function URL(url /* , base */) {
+	  var that = anInstance(this, URLConstructor, 'URL');
+	  var base = arguments.length > 1 ? arguments[1] : undefined;
+	  var urlString = String(url);
+	  var state = setInternalState$6(that, { type: 'URL' });
+	  var baseState, failure;
+	  if (base !== undefined) {
+	    if (base instanceof URLConstructor) baseState = getInternalURLState(base);
+	    else {
+	      failure = parseURL(baseState = {}, String(base));
+	      if (failure) throw TypeError(failure);
+	    }
+	  }
+	  failure = parseURL(state, urlString, null, baseState);
+	  if (failure) throw TypeError(failure);
+	  var searchParams = state.searchParams = new URLSearchParams$1();
+	  var searchParamsState = getInternalSearchParamsState(searchParams);
+	  searchParamsState.updateSearchParams(state.query);
+	  searchParamsState.updateURL = function () {
+	    state.query = String(searchParams) || null;
+	  };
+	  if (!descriptors) {
+	    that.href = serializeURL.call(that);
+	    that.origin = getOrigin.call(that);
+	    that.protocol = getProtocol.call(that);
+	    that.username = getUsername.call(that);
+	    that.password = getPassword.call(that);
+	    that.host = getHost.call(that);
+	    that.hostname = getHostname.call(that);
+	    that.port = getPort.call(that);
+	    that.pathname = getPathname.call(that);
+	    that.search = getSearch.call(that);
+	    that.searchParams = getSearchParams.call(that);
+	    that.hash = getHash.call(that);
+	  }
+	};
+
+	var URLPrototype = URLConstructor.prototype;
+
+	var serializeURL = function () {
+	  var url = getInternalURLState(this);
+	  var scheme = url.scheme;
+	  var username = url.username;
+	  var password = url.password;
+	  var host = url.host;
+	  var port = url.port;
+	  var path = url.path;
+	  var query = url.query;
+	  var fragment = url.fragment;
+	  var output = scheme + ':';
+	  if (host !== null) {
+	    output += '//';
+	    if (includesCredentials(url)) {
+	      output += username + (password ? ':' + password : '') + '@';
+	    }
+	    output += serializeHost(host);
+	    if (port !== null) output += ':' + port;
+	  } else if (scheme == 'file') output += '//';
+	  output += url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';
+	  if (query !== null) output += '?' + query;
+	  if (fragment !== null) output += '#' + fragment;
+	  return output;
+	};
+
+	var getOrigin = function () {
+	  var url = getInternalURLState(this);
+	  var scheme = url.scheme;
+	  var port = url.port;
+	  if (scheme == 'blob') try {
+	    return new URL(scheme.path[0]).origin;
+	  } catch (error) {
+	    return 'null';
+	  }
+	  if (scheme == 'file' || !isSpecial(url)) return 'null';
+	  return scheme + '://' + serializeHost(url.host) + (port !== null ? ':' + port : '');
+	};
+
+	var getProtocol = function () {
+	  return getInternalURLState(this).scheme + ':';
+	};
+
+	var getUsername = function () {
+	  return getInternalURLState(this).username;
+	};
+
+	var getPassword = function () {
+	  return getInternalURLState(this).password;
+	};
+
+	var getHost = function () {
+	  var url = getInternalURLState(this);
+	  var host = url.host;
+	  var port = url.port;
+	  return host === null ? ''
+	    : port === null ? serializeHost(host)
+	    : serializeHost(host) + ':' + port;
+	};
+
+	var getHostname = function () {
+	  var host = getInternalURLState(this).host;
+	  return host === null ? '' : serializeHost(host);
+	};
+
+	var getPort = function () {
+	  var port = getInternalURLState(this).port;
+	  return port === null ? '' : String(port);
+	};
+
+	var getPathname = function () {
+	  var url = getInternalURLState(this);
+	  var path = url.path;
+	  return url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';
+	};
+
+	var getSearch = function () {
+	  var query = getInternalURLState(this).query;
+	  return query ? '?' + query : '';
+	};
+
+	var getSearchParams = function () {
+	  return getInternalURLState(this).searchParams;
+	};
+
+	var getHash = function () {
+	  var fragment = getInternalURLState(this).fragment;
+	  return fragment ? '#' + fragment : '';
+	};
+
+	var accessorDescriptor = function (getter, setter) {
+	  return { get: getter, set: setter, configurable: true, enumerable: true };
+	};
+
+	if (descriptors) {
+	  objectDefineProperties(URLPrototype, {
+	    // `URL.prototype.href` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-href
+	    href: accessorDescriptor(serializeURL, function (href) {
+	      var url = getInternalURLState(this);
+	      var urlString = String(href);
+	      var failure = parseURL(url, urlString);
+	      if (failure) throw TypeError(failure);
+	      getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);
+	    }),
+	    // `URL.prototype.origin` getter
+	    // https://url.spec.whatwg.org/#dom-url-origin
+	    origin: accessorDescriptor(getOrigin),
+	    // `URL.prototype.protocol` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-protocol
+	    protocol: accessorDescriptor(getProtocol, function (protocol) {
+	      var url = getInternalURLState(this);
+	      parseURL(url, String(protocol) + ':', SCHEME_START);
+	    }),
+	    // `URL.prototype.username` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-username
+	    username: accessorDescriptor(getUsername, function (username) {
+	      var url = getInternalURLState(this);
+	      var codePoints = arrayFrom(String(username));
+	      if (cannotHaveUsernamePasswordPort(url)) return;
+	      url.username = '';
+	      for (var i = 0; i < codePoints.length; i++) {
+	        url.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);
+	      }
+	    }),
+	    // `URL.prototype.password` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-password
+	    password: accessorDescriptor(getPassword, function (password) {
+	      var url = getInternalURLState(this);
+	      var codePoints = arrayFrom(String(password));
+	      if (cannotHaveUsernamePasswordPort(url)) return;
+	      url.password = '';
+	      for (var i = 0; i < codePoints.length; i++) {
+	        url.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);
+	      }
+	    }),
+	    // `URL.prototype.host` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-host
+	    host: accessorDescriptor(getHost, function (host) {
+	      var url = getInternalURLState(this);
+	      if (url.cannotBeABaseURL) return;
+	      parseURL(url, String(host), HOST);
+	    }),
+	    // `URL.prototype.hostname` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-hostname
+	    hostname: accessorDescriptor(getHostname, function (hostname) {
+	      var url = getInternalURLState(this);
+	      if (url.cannotBeABaseURL) return;
+	      parseURL(url, String(hostname), HOSTNAME);
+	    }),
+	    // `URL.prototype.port` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-port
+	    port: accessorDescriptor(getPort, function (port) {
+	      var url = getInternalURLState(this);
+	      if (cannotHaveUsernamePasswordPort(url)) return;
+	      port = String(port);
+	      if (port == '') url.port = null;
+	      else parseURL(url, port, PORT);
+	    }),
+	    // `URL.prototype.pathname` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-pathname
+	    pathname: accessorDescriptor(getPathname, function (pathname) {
+	      var url = getInternalURLState(this);
+	      if (url.cannotBeABaseURL) return;
+	      url.path = [];
+	      parseURL(url, pathname + '', PATH_START);
+	    }),
+	    // `URL.prototype.search` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-search
+	    search: accessorDescriptor(getSearch, function (search) {
+	      var url = getInternalURLState(this);
+	      search = String(search);
+	      if (search == '') {
+	        url.query = null;
+	      } else {
+	        if ('?' == search.charAt(0)) search = search.slice(1);
+	        url.query = '';
+	        parseURL(url, search, QUERY);
+	      }
+	      getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);
+	    }),
+	    // `URL.prototype.searchParams` getter
+	    // https://url.spec.whatwg.org/#dom-url-searchparams
+	    searchParams: accessorDescriptor(getSearchParams),
+	    // `URL.prototype.hash` accessors pair
+	    // https://url.spec.whatwg.org/#dom-url-hash
+	    hash: accessorDescriptor(getHash, function (hash) {
+	      var url = getInternalURLState(this);
+	      hash = String(hash);
+	      if (hash == '') {
+	        url.fragment = null;
+	        return;
+	      }
+	      if ('#' == hash.charAt(0)) hash = hash.slice(1);
+	      url.fragment = '';
+	      parseURL(url, hash, FRAGMENT);
+	    })
+	  });
+	}
+
+	// `URL.prototype.toJSON` method
+	// https://url.spec.whatwg.org/#dom-url-tojson
+	redefine(URLPrototype, 'toJSON', function toJSON() {
+	  return serializeURL.call(this);
+	}, { enumerable: true });
+
+	// `URL.prototype.toString` method
+	// https://url.spec.whatwg.org/#URL-stringification-behavior
+	redefine(URLPrototype, 'toString', function toString() {
+	  return serializeURL.call(this);
+	}, { enumerable: true });
+
+	if (NativeURL) {
+	  var nativeCreateObjectURL = NativeURL.createObjectURL;
+	  var nativeRevokeObjectURL = NativeURL.revokeObjectURL;
+	  // `URL.createObjectURL` method
+	  // https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL
+	  // eslint-disable-next-line no-unused-vars
+	  if (nativeCreateObjectURL) redefine(URLConstructor, 'createObjectURL', function createObjectURL(blob) {
+	    return nativeCreateObjectURL.apply(NativeURL, arguments);
+	  });
+	  // `URL.revokeObjectURL` method
+	  // https://developer.mozilla.org/en-US/docs/Web/API/URL/revokeObjectURL
+	  // eslint-disable-next-line no-unused-vars
+	  if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', function revokeObjectURL(url) {
+	    return nativeRevokeObjectURL.apply(NativeURL, arguments);
+	  });
+	}
+
+	setToStringTag(URLConstructor, 'URL');
+
+	_export({ global: true, forced: !nativeUrl, sham: !descriptors }, {
+	  URL: URLConstructor
+	});
+
+	function _typeof(obj) {
+	  "@babel/helpers - typeof";
+
+	  if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
+	    _typeof = function (obj) {
+	      return typeof obj;
+	    };
+	  } else {
+	    _typeof = function (obj) {
+	      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+	    };
+	  }
+
+	  return _typeof(obj);
+	}
+
+	function _classCallCheck(instance, Constructor) {
+	  if (!(instance instanceof Constructor)) {
+	    throw new TypeError("Cannot call a class as a function");
+	  }
+	}
+
+	function _defineProperties(target, props) {
+	  for (var i = 0; i < props.length; i++) {
+	    var descriptor = props[i];
+	    descriptor.enumerable = descriptor.enumerable || false;
+	    descriptor.configurable = true;
+	    if ("value" in descriptor) descriptor.writable = true;
+	    Object.defineProperty(target, descriptor.key, descriptor);
+	  }
+	}
+
+	function _createClass(Constructor, protoProps, staticProps) {
+	  if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+	  if (staticProps) _defineProperties(Constructor, staticProps);
+	  return Constructor;
+	}
+
+	function _defineProperty(obj, key, value) {
+	  if (key in obj) {
+	    Object.defineProperty(obj, key, {
+	      value: value,
+	      enumerable: true,
+	      configurable: true,
+	      writable: true
+	    });
+	  } else {
+	    obj[key] = value;
+	  }
+
+	  return obj;
+	}
+
+	function _slicedToArray(arr, i) {
+	  return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
+	}
+
+	function _toConsumableArray(arr) {
+	  return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
+	}
+
+	function _arrayWithoutHoles(arr) {
+	  if (Array.isArray(arr)) return _arrayLikeToArray(arr);
+	}
+
+	function _arrayWithHoles(arr) {
+	  if (Array.isArray(arr)) return arr;
+	}
+
+	function _iterableToArray(iter) {
+	  if (typeof Symbol !== "undefined" && Symbol.iterator in Object(iter)) return Array.from(iter);
+	}
+
+	function _iterableToArrayLimit(arr, i) {
+	  if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return;
+	  var _arr = [];
+	  var _n = true;
+	  var _d = false;
+	  var _e = undefined;
+
+	  try {
+	    for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
+	      _arr.push(_s.value);
+
+	      if (i && _arr.length === i) break;
+	    }
+	  } catch (err) {
+	    _d = true;
+	    _e = err;
+	  } finally {
+	    try {
+	      if (!_n && _i["return"] != null) _i["return"]();
+	    } finally {
+	      if (_d) throw _e;
+	    }
+	  }
+
+	  return _arr;
+	}
+
+	function _unsupportedIterableToArray(o, minLen) {
+	  if (!o) return;
+	  if (typeof o === "string") return _arrayLikeToArray(o, minLen);
+	  var n = Object.prototype.toString.call(o).slice(8, -1);
+	  if (n === "Object" && o.constructor) n = o.constructor.name;
+	  if (n === "Map" || n === "Set") return Array.from(o);
+	  if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
+	}
+
+	function _arrayLikeToArray(arr, len) {
+	  if (len == null || len > arr.length) len = arr.length;
+
+	  for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
+
+	  return arr2;
+	}
+
+	function _nonIterableSpread() {
+	  throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+	}
+
+	function _nonIterableRest() {
+	  throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+	}
+
+	function _createForOfIteratorHelper(o, allowArrayLike) {
+	  var it;
+
+	  if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) {
+	    if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
+	      if (it) o = it;
+	      var i = 0;
+
+	      var F = function () {};
+
+	      return {
+	        s: F,
+	        n: function () {
+	          if (i >= o.length) return {
+	            done: true
+	          };
+	          return {
+	            done: false,
+	            value: o[i++]
+	          };
+	        },
+	        e: function (e) {
+	          throw e;
+	        },
+	        f: F
+	      };
+	    }
+
+	    throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+	  }
+
+	  var normalCompletion = true,
+	      didErr = false,
+	      err;
+	  return {
+	    s: function () {
+	      it = o[Symbol.iterator]();
+	    },
+	    n: function () {
+	      var step = it.next();
+	      normalCompletion = step.done;
+	      return step;
+	    },
+	    e: function (e) {
+	      didErr = true;
+	      err = e;
+	    },
+	    f: function () {
+	      try {
+	        if (!normalCompletion && it.return != null) it.return();
+	      } finally {
+	        if (didErr) throw err;
+	      }
+	    }
+	  };
+	}
+
+	var global$1 = typeof globalThis !== 'undefined' && globalThis || typeof self !== 'undefined' && self || typeof global$1 !== 'undefined' && global$1;
+	var support = {
+	  searchParams: 'URLSearchParams' in global$1,
+	  iterable: 'Symbol' in global$1 && 'iterator' in Symbol,
+	  blob: 'FileReader' in global$1 && 'Blob' in global$1 && function () {
+	    try {
+	      new Blob();
+	      return true;
+	    } catch (e) {
+	      return false;
+	    }
+	  }(),
+	  formData: 'FormData' in global$1,
+	  arrayBuffer: 'ArrayBuffer' in global$1
+	};
+
+	function isDataView(obj) {
+	  return obj && DataView.prototype.isPrototypeOf(obj);
+	}
+
+	if (support.arrayBuffer) {
+	  var viewClasses = ['[object Int8Array]', '[object Uint8Array]', '[object Uint8ClampedArray]', '[object Int16Array]', '[object Uint16Array]', '[object Int32Array]', '[object Uint32Array]', '[object Float32Array]', '[object Float64Array]'];
+
+	  var isArrayBufferView = ArrayBuffer.isView || function (obj) {
+	    return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1;
+	  };
+	}
+
+	function normalizeName(name) {
+	  if (typeof name !== 'string') {
+	    name = String(name);
+	  }
+
+	  if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
+	    throw new TypeError('Invalid character in header field name');
+	  }
+
+	  return name.toLowerCase();
+	}
+
+	function normalizeValue(value) {
+	  if (typeof value !== 'string') {
+	    value = String(value);
+	  }
+
+	  return value;
+	} // Build a destructive iterator for the value list
+
+
+	function iteratorFor(items) {
+	  var iterator = {
+	    next: function next() {
+	      var value = items.shift();
+	      return {
+	        done: value === undefined,
+	        value: value
+	      };
+	    }
+	  };
+
+	  if (support.iterable) {
+	    iterator[Symbol.iterator] = function () {
+	      return iterator;
+	    };
+	  }
+
+	  return iterator;
+	}
+
+	function Headers$1(headers) {
+	  this.map = {};
+
+	  if (headers instanceof Headers$1) {
+	    headers.forEach(function (value, name) {
+	      this.append(name, value);
+	    }, this);
+	  } else if (Array.isArray(headers)) {
+	    headers.forEach(function (header) {
+	      this.append(header[0], header[1]);
+	    }, this);
+	  } else if (headers) {
+	    Object.getOwnPropertyNames(headers).forEach(function (name) {
+	      this.append(name, headers[name]);
+	    }, this);
+	  }
+	}
+
+	Headers$1.prototype.append = function (name, value) {
+	  name = normalizeName(name);
+	  value = normalizeValue(value);
+	  var oldValue = this.map[name];
+	  this.map[name] = oldValue ? oldValue + ', ' + value : value;
+	};
+
+	Headers$1.prototype['delete'] = function (name) {
+	  delete this.map[normalizeName(name)];
+	};
+
+	Headers$1.prototype.get = function (name) {
+	  name = normalizeName(name);
+	  return this.has(name) ? this.map[name] : null;
+	};
+
+	Headers$1.prototype.has = function (name) {
+	  return this.map.hasOwnProperty(normalizeName(name));
+	};
+
+	Headers$1.prototype.set = function (name, value) {
+	  this.map[normalizeName(name)] = normalizeValue(value);
+	};
+
+	Headers$1.prototype.forEach = function (callback, thisArg) {
+	  for (var name in this.map) {
 	    if (this.map.hasOwnProperty(name)) {
 	      callback.call(thisArg, this.map[name], name, this);
 	    }
 	  }
 	};
 
-	Headers.prototype.keys = function() {
+	Headers$1.prototype.keys = function () {
 	  var items = [];
-	  this.forEach(function(value, name) {
+	  this.forEach(function (value, name) {
 	    items.push(name);
 	  });
-	  return iteratorFor(items)
+	  return iteratorFor(items);
 	};
 
-	Headers.prototype.values = function() {
+	Headers$1.prototype.values = function () {
 	  var items = [];
-	  this.forEach(function(value) {
+	  this.forEach(function (value) {
 	    items.push(value);
 	  });
-	  return iteratorFor(items)
+	  return iteratorFor(items);
 	};
 
-	Headers.prototype.entries = function() {
+	Headers$1.prototype.entries = function () {
 	  var items = [];
-	  this.forEach(function(value, name) {
+	  this.forEach(function (value, name) {
 	    items.push([name, value]);
 	  });
-	  return iteratorFor(items)
+	  return iteratorFor(items);
 	};
 
 	if (support.iterable) {
-	  Headers.prototype[Symbol.iterator] = Headers.prototype.entries;
+	  Headers$1.prototype[Symbol.iterator] = Headers$1.prototype.entries;
 	}
 
 	function consumed(body) {
 	  if (body.bodyUsed) {
-	    return Promise.reject(new TypeError('Already read'))
+	    return Promise.reject(new TypeError('Already read'));
 	  }
+
 	  body.bodyUsed = true;
 	}
 
 	function fileReaderReady(reader) {
-	  return new Promise(function(resolve, reject) {
-	    reader.onload = function() {
+	  return new Promise(function (resolve, reject) {
+	    reader.onload = function () {
 	      resolve(reader.result);
 	    };
-	    reader.onerror = function() {
+
+	    reader.onerror = function () {
 	      reject(reader.error);
 	    };
-	  })
+	  });
 	}
 
 	function readBlobAsArrayBuffer(blob) {
 	  var reader = new FileReader();
 	  var promise = fileReaderReady(reader);
 	  reader.readAsArrayBuffer(blob);
-	  return promise
+	  return promise;
 	}
 
 	function readBlobAsText(blob) {
 	  var reader = new FileReader();
 	  var promise = fileReaderReady(reader);
 	  reader.readAsText(blob);
-	  return promise
+	  return promise;
 	}
 
 	function readArrayBufferAsText(buf) {
@@ -5031,23 +6434,24 @@
 	  for (var i = 0; i < view.length; i++) {
 	    chars[i] = String.fromCharCode(view[i]);
 	  }
-	  return chars.join('')
+
+	  return chars.join('');
 	}
 
 	function bufferClone(buf) {
 	  if (buf.slice) {
-	    return buf.slice(0)
+	    return buf.slice(0);
 	  } else {
 	    var view = new Uint8Array(buf.byteLength);
 	    view.set(new Uint8Array(buf));
-	    return view.buffer
+	    return view.buffer;
 	  }
 	}
 
 	function Body() {
 	  this.bodyUsed = false;
 
-	  this._initBody = function(body) {
+	  this._initBody = function (body) {
 	    /*
 	      fetch-mock wraps the Response object in an ES6 Proxy to
 	      provide useful test harness features such as flush. However, on
@@ -5060,6 +6464,7 @@
 	    */
 	    this.bodyUsed = this.bodyUsed;
 	    this._bodyInit = body;
+
 	    if (!body) {
 	      this._bodyText = '';
 	    } else if (typeof body === 'string') {
@@ -5071,8 +6476,8 @@
 	    } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
 	      this._bodyText = body.toString();
 	    } else if (support.arrayBuffer && support.blob && isDataView(body)) {
-	      this._bodyArrayBuffer = bufferClone(body.buffer);
-	      // IE 10-11 can't handle a DataView body.
+	      this._bodyArrayBuffer = bufferClone(body.buffer); // IE 10-11 can't handle a DataView body.
+
 	      this._bodyInit = new Blob([this._bodyArrayBuffer]);
 	    } else if (support.arrayBuffer && (ArrayBuffer.prototype.isPrototypeOf(body) || isArrayBufferView(body))) {
 	      this._bodyArrayBuffer = bufferClone(body);
@@ -5092,86 +6497,106 @@
 	  };
 
 	  if (support.blob) {
-	    this.blob = function() {
+	    this.blob = function () {
 	      var rejected = consumed(this);
+
 	      if (rejected) {
-	        return rejected
+	        return rejected;
 	      }
 
 	      if (this._bodyBlob) {
-	        return Promise.resolve(this._bodyBlob)
+	        return Promise.resolve(this._bodyBlob);
 	      } else if (this._bodyArrayBuffer) {
-	        return Promise.resolve(new Blob([this._bodyArrayBuffer]))
+	        return Promise.resolve(new Blob([this._bodyArrayBuffer]));
 	      } else if (this._bodyFormData) {
-	        throw new Error('could not read FormData body as blob')
+	        throw new Error('could not read FormData body as blob');
 	      } else {
-	        return Promise.resolve(new Blob([this._bodyText]))
+	        return Promise.resolve(new Blob([this._bodyText]));
 	      }
 	    };
 
-	    this.arrayBuffer = function() {
+	    this.arrayBuffer = function () {
 	      if (this._bodyArrayBuffer) {
-	        return consumed(this) || Promise.resolve(this._bodyArrayBuffer)
+	        var isConsumed = consumed(this);
+
+	        if (isConsumed) {
+	          return isConsumed;
+	        }
+
+	        if (ArrayBuffer.isView(this._bodyArrayBuffer)) {
+	          return Promise.resolve(this._bodyArrayBuffer.buffer.slice(this._bodyArrayBuffer.byteOffset, this._bodyArrayBuffer.byteOffset + this._bodyArrayBuffer.byteLength));
+	        } else {
+	          return Promise.resolve(this._bodyArrayBuffer);
+	        }
 	      } else {
-	        return this.blob().then(readBlobAsArrayBuffer)
+	        return this.blob().then(readBlobAsArrayBuffer);
 	      }
 	    };
 	  }
 
-	  this.text = function() {
+	  this.text = function () {
 	    var rejected = consumed(this);
+
 	    if (rejected) {
-	      return rejected
+	      return rejected;
 	    }
 
 	    if (this._bodyBlob) {
-	      return readBlobAsText(this._bodyBlob)
+	      return readBlobAsText(this._bodyBlob);
 	    } else if (this._bodyArrayBuffer) {
-	      return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer))
+	      return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer));
 	    } else if (this._bodyFormData) {
-	      throw new Error('could not read FormData body as text')
+	      throw new Error('could not read FormData body as text');
 	    } else {
-	      return Promise.resolve(this._bodyText)
+	      return Promise.resolve(this._bodyText);
 	    }
 	  };
 
 	  if (support.formData) {
-	    this.formData = function() {
-	      return this.text().then(decode)
+	    this.formData = function () {
+	      return this.text().then(decode);
 	    };
 	  }
 
-	  this.json = function() {
-	    return this.text().then(JSON.parse)
+	  this.json = function () {
+	    return this.text().then(JSON.parse);
 	  };
 
-	  return this
-	}
+	  return this;
+	} // HTTP methods whose capitalization should be normalized
+
 
-	// HTTP methods whose capitalization should be normalized
 	var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'];
 
 	function normalizeMethod(method) {
 	  var upcased = method.toUpperCase();
-	  return methods.indexOf(upcased) > -1 ? upcased : method
+	  return methods.indexOf(upcased) > -1 ? upcased : method;
 	}
 
 	function Request(input, options) {
+	  if (!(this instanceof Request)) {
+	    throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
+	  }
+
 	  options = options || {};
 	  var body = options.body;
 
 	  if (input instanceof Request) {
 	    if (input.bodyUsed) {
-	      throw new TypeError('Already read')
+	      throw new TypeError('Already read');
 	    }
+
 	    this.url = input.url;
 	    this.credentials = input.credentials;
+
 	    if (!options.headers) {
-	      this.headers = new Headers(input.headers);
+	      this.headers = new Headers$1(input.headers);
 	    }
+
 	    this.method = input.method;
 	    this.mode = input.mode;
 	    this.signal = input.signal;
+
 	    if (!body && input._bodyInit != null) {
 	      body = input._bodyInit;
 	      input.bodyUsed = true;
@@ -5181,23 +6606,27 @@
 	  }
 
 	  this.credentials = options.credentials || this.credentials || 'same-origin';
+
 	  if (options.headers || !this.headers) {
-	    this.headers = new Headers(options.headers);
+	    this.headers = new Headers$1(options.headers);
 	  }
+
 	  this.method = normalizeMethod(options.method || this.method || 'GET');
 	  this.mode = options.mode || this.mode || null;
 	  this.signal = options.signal || this.signal;
 	  this.referrer = null;
 
 	  if ((this.method === 'GET' || this.method === 'HEAD') && body) {
-	    throw new TypeError('Body not allowed for GET or HEAD requests')
+	    throw new TypeError('Body not allowed for GET or HEAD requests');
 	  }
+
 	  this._initBody(body);
 
 	  if (this.method === 'GET' || this.method === 'HEAD') {
 	    if (options.cache === 'no-store' || options.cache === 'no-cache') {
 	      // Search for a '_' parameter in the query string
 	      var reParamSearch = /([?&])_=[^&]*/;
+
 	      if (reParamSearch.test(this.url)) {
 	        // If it already exists then set the value with the current time
 	        this.url = this.url.replace(reParamSearch, '$1_=' + new Date().getTime());
@@ -5210,45 +6639,48 @@
 	  }
 	}
 
-	Request.prototype.clone = function() {
-	  return new Request(this, {body: this._bodyInit})
+	Request.prototype.clone = function () {
+	  return new Request(this, {
+	    body: this._bodyInit
+	  });
 	};
 
 	function decode(body) {
 	  var form = new FormData();
-	  body
-	    .trim()
-	    .split('&')
-	    .forEach(function(bytes) {
-	      if (bytes) {
-	        var split = bytes.split('=');
-	        var name = split.shift().replace(/\+/g, ' ');
-	        var value = split.join('=').replace(/\+/g, ' ');
-	        form.append(decodeURIComponent(name), decodeURIComponent(value));
-	      }
-	    });
-	  return form
+	  body.trim().split('&').forEach(function (bytes) {
+	    if (bytes) {
+	      var split = bytes.split('=');
+	      var name = split.shift().replace(/\+/g, ' ');
+	      var value = split.join('=').replace(/\+/g, ' ');
+	      form.append(decodeURIComponent(name), decodeURIComponent(value));
+	    }
+	  });
+	  return form;
 	}
 
 	function parseHeaders(rawHeaders) {
-	  var headers = new Headers();
-	  // Replace instances of \r\n and \n followed by at least one space or horizontal tab with a space
+	  var headers = new Headers$1(); // Replace instances of \r\n and \n followed by at least one space or horizontal tab with a space
 	  // https://tools.ietf.org/html/rfc7230#section-3.2
+
 	  var preProcessedHeaders = rawHeaders.replace(/\r?\n[\t ]+/g, ' ');
-	  preProcessedHeaders.split(/\r?\n/).forEach(function(line) {
+	  preProcessedHeaders.split(/\r?\n/).forEach(function (line) {
 	    var parts = line.split(':');
 	    var key = parts.shift().trim();
+
 	    if (key) {
 	      var value = parts.join(':').trim();
 	      headers.append(key, value);
 	    }
 	  });
-	  return headers
+	  return headers;
 	}
 
 	Body.call(Request.prototype);
-
 	function Response(bodyInit, options) {
+	  if (!(this instanceof Response)) {
+	    throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
+	  }
+
 	  if (!options) {
 	    options = {};
 	  }
@@ -5257,57 +6689,68 @@
 	  this.status = options.status === undefined ? 200 : options.status;
 	  this.ok = this.status >= 200 && this.status < 300;
 	  this.statusText = 'statusText' in options ? options.statusText : '';
-	  this.headers = new Headers(options.headers);
+	  this.headers = new Headers$1(options.headers);
 	  this.url = options.url || '';
+
 	  this._initBody(bodyInit);
 	}
-
 	Body.call(Response.prototype);
 
-	Response.prototype.clone = function() {
+	Response.prototype.clone = function () {
 	  return new Response(this._bodyInit, {
 	    status: this.status,
 	    statusText: this.statusText,
-	    headers: new Headers(this.headers),
+	    headers: new Headers$1(this.headers),
 	    url: this.url
-	  })
+	  });
 	};
 
-	Response.error = function() {
-	  var response = new Response(null, {status: 0, statusText: ''});
+	Response.error = function () {
+	  var response = new Response(null, {
+	    status: 0,
+	    statusText: ''
+	  });
 	  response.type = 'error';
-	  return response
+	  return response;
 	};
 
 	var redirectStatuses = [301, 302, 303, 307, 308];
 
-	Response.redirect = function(url, status) {
+	Response.redirect = function (url, status) {
 	  if (redirectStatuses.indexOf(status) === -1) {
-	    throw new RangeError('Invalid status code')
+	    throw new RangeError('Invalid status code');
 	  }
 
-	  return new Response(null, {status: status, headers: {location: url}})
+	  return new Response(null, {
+	    status: status,
+	    headers: {
+	      location: url
+	    }
+	  });
 	};
 
 	var DOMException$1 = global$1.DOMException;
 
-	if (typeof DOMException$1 !== 'function') {
-	  DOMException$1 = function(message, name) {
+	try {
+	  new DOMException$1();
+	} catch (err) {
+	  DOMException$1 = function DOMException(message, name) {
 	    this.message = message;
 	    this.name = name;
 	    var error = Error(message);
 	    this.stack = error.stack;
 	  };
+
 	  DOMException$1.prototype = Object.create(Error.prototype);
 	  DOMException$1.prototype.constructor = DOMException$1;
 	}
 
 	function fetch$1(input, init) {
-	  return new Promise(function(resolve, reject) {
+	  return new Promise(function (resolve, reject) {
 	    var request = new Request(input, init);
 
 	    if (request.signal && request.signal.aborted) {
-	      return reject(new DOMException$1('Aborted', 'AbortError'))
+	      return reject(new DOMException$1('Aborted', 'AbortError'));
 	    }
 
 	    var xhr = new XMLHttpRequest();
@@ -5316,7 +6759,7 @@
 	      xhr.abort();
 	    }
 
-	    xhr.onload = function() {
+	    xhr.onload = function () {
 	      var options = {
 	        status: xhr.status,
 	        statusText: xhr.statusText,
@@ -5324,34 +6767,34 @@
 	      };
 	      options.url = 'responseURL' in xhr ? xhr.responseURL : options.headers.get('X-Request-URL');
 	      var body = 'response' in xhr ? xhr.response : xhr.responseText;
-	      setTimeout(function() {
+	      setTimeout(function () {
 	        resolve(new Response(body, options));
 	      }, 0);
 	    };
 
-	    xhr.onerror = function() {
-	      setTimeout(function() {
+	    xhr.onerror = function () {
+	      setTimeout(function () {
 	        reject(new TypeError('Network request failed'));
 	      }, 0);
 	    };
 
-	    xhr.ontimeout = function() {
-	      setTimeout(function() {
+	    xhr.ontimeout = function () {
+	      setTimeout(function () {
 	        reject(new TypeError('Network request failed'));
 	      }, 0);
 	    };
 
-	    xhr.onabort = function() {
-	      setTimeout(function() {
+	    xhr.onabort = function () {
+	      setTimeout(function () {
 	        reject(new DOMException$1('Aborted', 'AbortError'));
 	      }, 0);
 	    };
 
 	    function fixUrl(url) {
 	      try {
-	        return url === '' && global$1.location.href ? global$1.location.href : url
+	        return url === '' && global$1.location.href ? global$1.location.href : url;
 	      } catch (e) {
-	        return url
+	        return url;
 	      }
 	    }
 
@@ -5366,23 +6809,25 @@
 	    if ('responseType' in xhr) {
 	      if (support.blob) {
 	        xhr.responseType = 'blob';
-	      } else if (
-	        support.arrayBuffer &&
-	        request.headers.get('Content-Type') &&
-	        request.headers.get('Content-Type').indexOf('application/octet-stream') !== -1
-	      ) {
+	      } else if (support.arrayBuffer && request.headers.get('Content-Type') && request.headers.get('Content-Type').indexOf('application/octet-stream') !== -1) {
 	        xhr.responseType = 'arraybuffer';
 	      }
 	    }
 
-	    request.headers.forEach(function(value, name) {
-	      xhr.setRequestHeader(name, value);
-	    });
+	    if (init && _typeof(init.headers) === 'object' && !(init.headers instanceof Headers$1)) {
+	      Object.getOwnPropertyNames(init.headers).forEach(function (name) {
+	        xhr.setRequestHeader(name, normalizeValue(init.headers[name]));
+	      });
+	    } else {
+	      request.headers.forEach(function (value, name) {
+	        xhr.setRequestHeader(name, value);
+	      });
+	    }
 
 	    if (request.signal) {
 	      request.signal.addEventListener('abort', abortXhr);
 
-	      xhr.onreadystatechange = function() {
+	      xhr.onreadystatechange = function () {
 	        // DONE (success or failure)
 	        if (xhr.readyState === 4) {
 	          request.signal.removeEventListener('abort', abortXhr);
@@ -5391,153 +6836,214 @@
 	    }
 
 	    xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit);
-	  })
+	  });
 	}
-
 	fetch$1.polyfill = true;
 
 	if (!global$1.fetch) {
 	  global$1.fetch = fetch$1;
-	  global$1.Headers = Headers;
+	  global$1.Headers = Headers$1;
 	  global$1.Request = Request;
 	  global$1.Response = Response;
 	}
 
-	var lib = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-
+	// `Symbol.toStringTag` well-known symbol
+	// https://tc39.github.io/ecma262/#sec-symbol.tostringtag
+	defineWellKnownSymbol('toStringTag');
+
+	var HAS_SPECIES_SUPPORT$2 = arrayMethodHasSpeciesSupport('splice');
+	var USES_TO_LENGTH$5 = arrayMethodUsesToLength('splice', { ACCESSORS: true, 0: 0, 1: 2 });
+
+	var max$3 = Math.max;
+	var min$6 = Math.min;
+	var MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;
+	var MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded';
+
+	// `Array.prototype.splice` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.splice
+	// with adding support of @@species
+	_export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$2 || !USES_TO_LENGTH$5 }, {
+	  splice: function splice(start, deleteCount /* , ...items */) {
+	    var O = toObject(this);
+	    var len = toLength(O.length);
+	    var actualStart = toAbsoluteIndex(start, len);
+	    var argumentsLength = arguments.length;
+	    var insertCount, actualDeleteCount, A, k, from, to;
+	    if (argumentsLength === 0) {
+	      insertCount = actualDeleteCount = 0;
+	    } else if (argumentsLength === 1) {
+	      insertCount = 0;
+	      actualDeleteCount = len - actualStart;
+	    } else {
+	      insertCount = argumentsLength - 2;
+	      actualDeleteCount = min$6(max$3(toInteger(deleteCount), 0), len - actualStart);
+	    }
+	    if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER) {
+	      throw TypeError(MAXIMUM_ALLOWED_LENGTH_EXCEEDED);
+	    }
+	    A = arraySpeciesCreate(O, actualDeleteCount);
+	    for (k = 0; k < actualDeleteCount; k++) {
+	      from = actualStart + k;
+	      if (from in O) createProperty(A, k, O[from]);
+	    }
+	    A.length = actualDeleteCount;
+	    if (insertCount < actualDeleteCount) {
+	      for (k = actualStart; k < len - actualDeleteCount; k++) {
+	        from = k + actualDeleteCount;
+	        to = k + insertCount;
+	        if (from in O) O[to] = O[from];
+	        else delete O[to];
+	      }
+	      for (k = len; k > len - actualDeleteCount + insertCount; k--) delete O[k - 1];
+	    } else if (insertCount > actualDeleteCount) {
+	      for (k = len - actualDeleteCount; k > actualStart; k--) {
+	        from = k + actualDeleteCount - 1;
+	        to = k + insertCount - 1;
+	        if (from in O) O[to] = O[from];
+	        else delete O[to];
+	      }
+	    }
+	    for (k = 0; k < insertCount; k++) {
+	      O[k + actualStart] = arguments[k + 2];
+	    }
+	    O.length = len - actualDeleteCount + insertCount;
+	    return A;
+	  }
+	});
 
+	// JSON[@@toStringTag] property
+	// https://tc39.github.io/ecma262/#sec-json-@@tostringtag
+	setToStringTag(global_1.JSON, 'JSON', true);
 
+	// Math[@@toStringTag] property
+	// https://tc39.github.io/ecma262/#sec-math-@@tostringtag
+	setToStringTag(Math, 'Math', true);
 
+	// `Object.defineProperty` method
+	// https://tc39.github.io/ecma262/#sec-object.defineproperty
+	_export({ target: 'Object', stat: true, forced: !descriptors, sham: !descriptors }, {
+	  defineProperty: objectDefineProperty.f
+	});
 
+	var nativeGetOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
 
 
-	if (!window.Set) {
-	    window.Set = es6Set;
-	}
-	if (!window.Map) {
-	    window.Map = es6Map;
-	}
-	if (!window.Promise) {
-	    window.Promise = polyfill$e;
-	    window.Promise._immediateFn = setAsap;
-	}
-	if (!Array.prototype.find) {
-	    array_prototype_find.shim();
-	}
-	if (!Array.prototype.findIndex) {
-	    array_prototype_findindex.shim();
-	}
-	if (!Array.from) {
-	    array_from.shim();
-	}
-	if (!Object.values) {
-	    object_values.shim();
-	}
-	if (!Object.assign) {
-	    object_assign.shim();
-	}
-	if (!window.requestAnimationFrame || !window.cancelAnimationFrame) {
-	    window.requestAnimationFrame = raf_1;
-	    window.cancelAnimationFrame = raf_1.cancel;
-	}
+	var FAILS_ON_PRIMITIVES$1 = fails(function () { nativeGetOwnPropertyDescriptor$2(1); });
+	var FORCED$5 = !descriptors || FAILS_ON_PRIMITIVES$1;
 
-	var finalFetch = window.fetch;
-	var finalPromise = window.Promise;
-	window.fetch = function (input, init) {
-	    try {
-	        return finalFetch(input, init);
-	    }
-	    catch (error) {
-	        return new finalPromise(function (_, reject) { return reject(error); });
-	    }
-	};
+	// `Object.getOwnPropertyDescriptor` method
+	// https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptor
+	_export({ target: 'Object', stat: true, forced: FORCED$5, sham: !descriptors }, {
+	  getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {
+	    return nativeGetOwnPropertyDescriptor$2(toIndexedObject(it), key);
+	  }
 	});
 
-	var $Math$2 = GetIntrinsic('%Math%');
-
-	var $floor$1 = $Math$2.floor;
-	var $abs$1 = $Math$2.abs;
-
-
+	var FAILS_ON_PRIMITIVES$2 = fails(function () { objectGetPrototypeOf(1); });
 
+	// `Object.getPrototypeOf` method
+	// https://tc39.github.io/ecma262/#sec-object.getprototypeof
+	_export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$2, sham: !correctPrototypeGetter }, {
+	  getPrototypeOf: function getPrototypeOf(it) {
+	    return objectGetPrototypeOf(toObject(it));
+	  }
+	});
 
-	// https://www.ecma-international.org/ecma-262/6.0/#sec-isinteger
+	// `Object.setPrototypeOf` method
+	// https://tc39.github.io/ecma262/#sec-object.setprototypeof
+	_export({ target: 'Object', stat: true }, {
+	  setPrototypeOf: objectSetPrototypeOf
+	});
 
-	var IsInteger = function IsInteger(argument) {
-		if (typeof argument !== 'number' || _isNaN(argument) || !_isFinite(argument)) {
-			return false;
-		}
-		var abs = $abs$1(argument);
-		return $floor$1(abs) === abs;
-	};
+	var slice$1 = [].slice;
+	var factories = {};
 
-	var ArrayPush = callBound('Array.prototype.push');
-	var StringFromCharCodeSpread = callBind.apply(String.fromCharCode, null);
-
-	var implementation$8 = function fromCodePoint(_ /* fromCodePoint.length is 1 */) {
-		var arguments$1 = arguments;
-
-		var MAX_SIZE = 0x4000;
-		var codeUnits = [];
-		var highSurrogate;
-		var lowSurrogate;
-		var index = -1;
-		var length = arguments.length;
-		if (!length) {
-			return '';
-		}
-		var result = '';
-		while (++index < length) {
-			var codePoint = ToNumber$1(arguments$1[index]);
-			if (
-				!IsInteger(codePoint) ||
-				codePoint < 0 || codePoint > 0x10FFFF // not a valid Unicode code point
-			) {
-				throw RangeError('Invalid code point: ' + codePoint);
-			}
-			if (codePoint <= 0xFFFF) { // BMP code point
-				ArrayPush(codeUnits, codePoint);
-			} else { // Astral code point; split in surrogate halves
-				// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
-				codePoint -= 0x10000;
-				highSurrogate = (codePoint >> 10) + 0xD800;
-				lowSurrogate = (codePoint % 0x400) + 0xDC00;
-				ArrayPush(codeUnits, highSurrogate, lowSurrogate);
-			}
-			if (index + 1 == length || codeUnits.length > MAX_SIZE) {
-				result += StringFromCharCodeSpread(codeUnits);
-				codeUnits.length = 0;
-			}
-		}
-		return result;
+	var construct = function (C, argsLength, args) {
+	  if (!(argsLength in factories)) {
+	    for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';
+	    // eslint-disable-next-line no-new-func
+	    factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');
+	  } return factories[argsLength](C, args);
 	};
 
-	var polyfill$g = function getPolyfill() {
-		return String.fromCodePoint || implementation$8;
+	// `Function.prototype.bind` method implementation
+	// https://tc39.github.io/ecma262/#sec-function.prototype.bind
+	var functionBind = Function.bind || function bind(that /* , ...args */) {
+	  var fn = aFunction$1(this);
+	  var partArgs = slice$1.call(arguments, 1);
+	  var boundFunction = function bound(/* args... */) {
+	    var args = partArgs.concat(slice$1.call(arguments));
+	    return this instanceof boundFunction ? construct(fn, args.length, args) : fn.apply(that, args);
+	  };
+	  if (isObject(fn.prototype)) boundFunction.prototype = fn.prototype;
+	  return boundFunction;
 	};
 
-	var shim$d = function shimFromCodePoint() {
-		var polyfill = polyfill$g();
-
-		if (String.fromCodePoint !== polyfill) {
-			defineProperties_1(String, { fromCodePoint: polyfill });
-		}
-
-		return polyfill;
-	};
+	var nativeConstruct = getBuiltIn('Reflect', 'construct');
 
-	/*! https://mths.be/fromcodepoint v1.0.0 by @mathias */
+	// `Reflect.construct` method
+	// https://tc39.github.io/ecma262/#sec-reflect.construct
+	// MS Edge supports only 2 arguments and argumentsList argument is optional
+	// FF Nightly sets third argument as `new.target`, but does not create `this` from it
+	var NEW_TARGET_BUG = fails(function () {
+	  function F() { /* empty */ }
+	  return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);
+	});
+	var ARGS_BUG = !fails(function () {
+	  nativeConstruct(function () { /* empty */ });
+	});
+	var FORCED$6 = NEW_TARGET_BUG || ARGS_BUG;
+
+	_export({ target: 'Reflect', stat: true, forced: FORCED$6, sham: FORCED$6 }, {
+	  construct: function construct(Target, args /* , newTarget */) {
+	    aFunction$1(Target);
+	    anObject(args);
+	    var newTarget = arguments.length < 3 ? Target : aFunction$1(arguments[2]);
+	    if (ARGS_BUG && !NEW_TARGET_BUG) return nativeConstruct(Target, args, newTarget);
+	    if (Target == newTarget) {
+	      // w/o altered newTarget, optimization for 0-4 arguments
+	      switch (args.length) {
+	        case 0: return new Target();
+	        case 1: return new Target(args[0]);
+	        case 2: return new Target(args[0], args[1]);
+	        case 3: return new Target(args[0], args[1], args[2]);
+	        case 4: return new Target(args[0], args[1], args[2], args[3]);
+	      }
+	      // w/o altered newTarget, lot of arguments case
+	      var $args = [null];
+	      $args.push.apply($args, args);
+	      return new (functionBind.apply(Target, $args))();
+	    }
+	    // with altered newTarget, not support built-in constructors
+	    var proto = newTarget.prototype;
+	    var instance = objectCreate(isObject(proto) ? proto : Object.prototype);
+	    var result = Function.apply.call(Target, instance, args);
+	    return isObject(result) ? result : instance;
+	  }
+	});
 
-	shim$d();
+	// `Reflect.get` method
+	// https://tc39.github.io/ecma262/#sec-reflect.get
+	function get$2(target, propertyKey /* , receiver */) {
+	  var receiver = arguments.length < 3 ? target : arguments[2];
+	  var descriptor, prototype;
+	  if (anObject(target) === receiver) return target[propertyKey];
+	  if (descriptor = objectGetOwnPropertyDescriptor.f(target, propertyKey)) return has(descriptor, 'value')
+	    ? descriptor.value
+	    : descriptor.get === undefined
+	      ? undefined
+	      : descriptor.get.call(receiver);
+	  if (isObject(prototype = objectGetPrototypeOf(target))) return get$2(prototype, propertyKey, receiver);
+	}
+
+	_export({ target: 'Reflect', stat: true }, {
+	  get: get$2
+	});
 
 	(function (factory) {
-	  
-	  factory();
-	}((function () {
+	   factory();
+	})(function () {
+
 	  function _classCallCheck(instance, Constructor) {
 	    if (!(instance instanceof Constructor)) {
 	      throw new TypeError("Cannot call a class as a function");
@@ -5549,14 +7055,14 @@
 	      var descriptor = props[i];
 	      descriptor.enumerable = descriptor.enumerable || false;
 	      descriptor.configurable = true;
-	      if ("value" in descriptor) { descriptor.writable = true; }
+	      if ("value" in descriptor) descriptor.writable = true;
 	      Object.defineProperty(target, descriptor.key, descriptor);
 	    }
 	  }
 
 	  function _createClass(Constructor, protoProps, staticProps) {
-	    if (protoProps) { _defineProperties(Constructor.prototype, protoProps); }
-	    if (staticProps) { _defineProperties(Constructor, staticProps); }
+	    if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+	    if (staticProps) _defineProperties(Constructor, staticProps);
 	    return Constructor;
 	  }
 
@@ -5572,7 +7078,7 @@
 	        configurable: true
 	      }
 	    });
-	    if (superClass) { _setPrototypeOf(subClass, superClass); }
+	    if (superClass) _setPrototypeOf(subClass, superClass);
 	  }
 
 	  function _getPrototypeOf(o) {
@@ -5591,6 +7097,19 @@
 	    return _setPrototypeOf(o, p);
 	  }
 
+	  function _isNativeReflectConstruct() {
+	    if (typeof Reflect === "undefined" || !Reflect.construct) return false;
+	    if (Reflect.construct.sham) return false;
+	    if (typeof Proxy === "function") return true;
+
+	    try {
+	      Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));
+	      return true;
+	    } catch (e) {
+	      return false;
+	    }
+	  }
+
 	  function _assertThisInitialized(self) {
 	    if (self === void 0) {
 	      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
@@ -5600,17 +7119,36 @@
 	  }
 
 	  function _possibleConstructorReturn(self, call) {
-	    if (call && (typeof call === "object" || typeof call === "function")) {
+	    if (call && (_typeof(call) === "object" || typeof call === "function")) {
 	      return call;
 	    }
 
 	    return _assertThisInitialized(self);
 	  }
 
+	  function _createSuper(Derived) {
+	    var hasNativeReflectConstruct = _isNativeReflectConstruct();
+
+	    return function _createSuperInternal() {
+	      var Super = _getPrototypeOf(Derived),
+	          result;
+
+	      if (hasNativeReflectConstruct) {
+	        var NewTarget = _getPrototypeOf(this).constructor;
+
+	        result = Reflect.construct(Super, arguments, NewTarget);
+	      } else {
+	        result = Super.apply(this, arguments);
+	      }
+
+	      return _possibleConstructorReturn(this, result);
+	    };
+	  }
+
 	  function _superPropBase(object, property) {
 	    while (!Object.prototype.hasOwnProperty.call(object, property)) {
 	      object = _getPrototypeOf(object);
-	      if (object === null) { break; }
+	      if (object === null) break;
 	    }
 
 	    return object;
@@ -5623,7 +7161,7 @@
 	      _get = function _get(target, property, receiver) {
 	        var base = _superPropBase(target, property);
 
-	        if (!base) { return; }
+	        if (!base) return;
 	        var desc = Object.getOwnPropertyDescriptor(base, property);
 
 	        if (desc.get) {
@@ -5637,9 +7175,7 @@
 	    return _get(target, property, receiver || target);
 	  }
 
-	  var Emitter =
-	  /*#__PURE__*/
-	  function () {
+	  var Emitter = /*#__PURE__*/function () {
 	    function Emitter() {
 	      _classCallCheck(this, Emitter);
 
@@ -5703,17 +7239,17 @@
 	    return Emitter;
 	  }();
 
-	  var AbortSignal =
-	  /*#__PURE__*/
-	  function (_Emitter) {
+	  var AbortSignal = /*#__PURE__*/function (_Emitter) {
 	    _inherits(AbortSignal, _Emitter);
 
+	    var _super = _createSuper(AbortSignal);
+
 	    function AbortSignal() {
 	      var _this2;
 
 	      _classCallCheck(this, AbortSignal);
 
-	      _this2 = _possibleConstructorReturn(this, _getPrototypeOf(AbortSignal).call(this)); // Some versions of babel does not transpile super() correctly for IE <= 10, if the parent
+	      _this2 = _super.call(this); // Some versions of babel does not transpile super() correctly for IE <= 10, if the parent
 	      // constructor has failed to run, then "this.listeners" will still be undefined and then we call
 	      // the parent constructor directly instead as a workaround. For general details, see babel bug:
 	      // https://github.com/babel/babel/issues/3041
@@ -5761,14 +7297,13 @@
 
 	    return AbortSignal;
 	  }(Emitter);
-	  var AbortController =
-	  /*#__PURE__*/
-	  function () {
-	    function AbortController() {
-	      _classCallCheck(this, AbortController);
 
-	      // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
+	  var AbortController = /*#__PURE__*/function () {
+	    function AbortController() {
+	      _classCallCheck(this, AbortController); // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
 	      // we want Object.keys(new AbortController()) to be [] for compat with the native impl
+
+
 	      Object.defineProperty(this, 'signal', {
 	        value: new AbortSignal(),
 	        writable: true,
@@ -5838,7 +7373,6 @@
 
 	    return typeof self.Request === 'function' && !self.Request.prototype.hasOwnProperty('signal') || !self.AbortController;
 	  }
-
 	  /**
 	   * Note: the "fetch.Request" default value is available for fetch imported from
 	   * the "node-fetch" package and not in browsers. This is OK since browsers
@@ -5853,6 +7387,7 @@
 	   * @returns {fetch: abortableFetch, Request: AbortableRequest}
 	   */
 
+
 	  function abortableFetchDecorator(patchTargets) {
 	    if ('function' === typeof patchTargets) {
 	      patchTargets = {
@@ -5979,7 +7514,6 @@
 	  }
 
 	  (function (self) {
-
 	    if (!polyfillNeeded(self)) {
 	      return;
 	    }
@@ -6008,15 +7542,130 @@
 	      value: AbortSignal
 	    });
 	  })(typeof self !== 'undefined' ? self : commonjsGlobal);
-
-	})));
+	});
 
 	function actionAddEntity(way) {
-	    return function(graph) {
-	        return graph.replace(way);
-	    };
+	  return function (graph) {
+	    return graph.replace(way);
+	  };
 	}
 
+	var IS_CONCAT_SPREADABLE = wellKnownSymbol('isConcatSpreadable');
+	var MAX_SAFE_INTEGER$1 = 0x1FFFFFFFFFFFFF;
+	var MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded';
+
+	// We can't use this feature detection in V8 since it causes
+	// deoptimization and serious performance degradation
+	// https://github.com/zloirock/core-js/issues/679
+	var IS_CONCAT_SPREADABLE_SUPPORT = engineV8Version >= 51 || !fails(function () {
+	  var array = [];
+	  array[IS_CONCAT_SPREADABLE] = false;
+	  return array.concat()[0] !== array;
+	});
+
+	var SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('concat');
+
+	var isConcatSpreadable = function (O) {
+	  if (!isObject(O)) return false;
+	  var spreadable = O[IS_CONCAT_SPREADABLE];
+	  return spreadable !== undefined ? !!spreadable : isArray(O);
+	};
+
+	var FORCED$7 = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;
+
+	// `Array.prototype.concat` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.concat
+	// with adding support of @@isConcatSpreadable and @@species
+	_export({ target: 'Array', proto: true, forced: FORCED$7 }, {
+	  concat: function concat(arg) { // eslint-disable-line no-unused-vars
+	    var O = toObject(this);
+	    var A = arraySpeciesCreate(O, 0);
+	    var n = 0;
+	    var i, k, length, len, E;
+	    for (i = -1, length = arguments.length; i < length; i++) {
+	      E = i === -1 ? O : arguments[i];
+	      if (isConcatSpreadable(E)) {
+	        len = toLength(E.length);
+	        if (n + len > MAX_SAFE_INTEGER$1) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+	        for (k = 0; k < len; k++, n++) if (k in E) createProperty(A, n, E[k]);
+	      } else {
+	        if (n >= MAX_SAFE_INTEGER$1) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+	        createProperty(A, n++, E);
+	      }
+	    }
+	    A.length = n;
+	    return A;
+	  }
+	});
+
+	// `Object.assign` method
+	// https://tc39.github.io/ecma262/#sec-object.assign
+	_export({ target: 'Object', stat: true, forced: Object.assign !== objectAssign }, {
+	  assign: objectAssign
+	});
+
+	var $filter$1 = arrayIteration.filter;
+
+
+
+	var HAS_SPECIES_SUPPORT$3 = arrayMethodHasSpeciesSupport('filter');
+	// Edge 14- issue
+	var USES_TO_LENGTH$6 = arrayMethodUsesToLength('filter');
+
+	// `Array.prototype.filter` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.filter
+	// with adding support of @@species
+	_export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$3 || !USES_TO_LENGTH$6 }, {
+	  filter: function filter(callbackfn /* , thisArg */) {
+	    return $filter$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
+
+	var nativeReverse = [].reverse;
+	var test$1 = [1, 2];
+
+	// `Array.prototype.reverse` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.reverse
+	// fix for Safari 12.0 bug
+	// https://bugs.webkit.org/show_bug.cgi?id=188794
+	_export({ target: 'Array', proto: true, forced: String(test$1) === String(test$1.reverse()) }, {
+	  reverse: function reverse() {
+	    // eslint-disable-next-line no-self-assign
+	    if (isArray(this)) this.length = this.length;
+	    return nativeReverse.call(this);
+	  }
+	});
+
+	var FAILS_ON_PRIMITIVES$3 = fails(function () { objectKeys(1); });
+
+	// `Object.keys` method
+	// https://tc39.github.io/ecma262/#sec-object.keys
+	_export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$3 }, {
+	  keys: function keys(it) {
+	    return objectKeys(toObject(it));
+	  }
+	});
+
+	var trim = stringTrim.trim;
+
+
+	var $parseFloat = global_1.parseFloat;
+	var FORCED$8 = 1 / $parseFloat(whitespaces + '-0') !== -Infinity;
+
+	// `parseFloat` method
+	// https://tc39.github.io/ecma262/#sec-parsefloat-string
+	var numberParseFloat = FORCED$8 ? function parseFloat(string) {
+	  var trimmedString = trim(String(string));
+	  var result = $parseFloat(trimmedString);
+	  return result === 0 && trimmedString.charAt(0) == '-' ? -0 : result;
+	} : $parseFloat;
+
+	// `parseFloat` method
+	// https://tc39.github.io/ecma262/#sec-parsefloat-string
+	_export({ global: true, forced: parseFloat != numberParseFloat }, {
+	  parseFloat: numberParseFloat
+	});
+
 	/*
 	Order the nodes of a way in reverse order and reverse any direction dependent tags
 	other than `oneway`. (We assume that correcting a backwards oneway is the primary
@@ -6037,112047 +7686,90541 @@
 	    http://wiki.openstreetmap.org/wiki/Key:traffic_sign#On_a_way_or_area
 	*/
 	function actionReverse(entityID, options) {
-	    var ignoreKey = /^.*(_|:)?(description|name|note|website|ref|source|comment|watch|attribution)(_|:)?/;
-	    var numeric = /^([+\-]?)(?=[\d.])/;
-	    var directionKey = /direction$/;
-	    var turn_lanes = /^turn:lanes:?/;
-	    var keyReplacements = [
-	        [/:right$/, ':left'],
-	        [/:left$/, ':right'],
-	        [/:forward$/, ':backward'],
-	        [/:backward$/, ':forward'],
-	        [/:right:/, ':left:'],
-	        [/:left:/, ':right:'],
-	        [/:forward:/, ':backward:'],
-	        [/:backward:/, ':forward:']
-	    ];
-	    var valueReplacements = {
-	        left: 'right',
-	        right: 'left',
-	        up: 'down',
-	        down: 'up',
-	        forward: 'backward',
-	        backward: 'forward',
-	        forwards: 'backward',
-	        backwards: 'forward',
-	    };
-	    var roleReplacements = {
-	        forward: 'backward',
-	        backward: 'forward',
-	        forwards: 'backward',
-	        backwards: 'forward'
-	    };
-	    var onewayReplacements = {
-	        yes: '-1',
-	        '1': '-1',
-	        '-1': 'yes'
-	    };
+	  var ignoreKey = /^.*(_|:)?(description|name|note|website|ref|source|comment|watch|attribution)(_|:)?/;
+	  var numeric = /^([+\-]?)(?=[\d.])/;
+	  var directionKey = /direction$/;
+	  var turn_lanes = /^turn:lanes:?/;
+	  var keyReplacements = [[/:right$/, ':left'], [/:left$/, ':right'], [/:forward$/, ':backward'], [/:backward$/, ':forward'], [/:right:/, ':left:'], [/:left:/, ':right:'], [/:forward:/, ':backward:'], [/:backward:/, ':forward:']];
+	  var valueReplacements = {
+	    left: 'right',
+	    right: 'left',
+	    up: 'down',
+	    down: 'up',
+	    forward: 'backward',
+	    backward: 'forward',
+	    forwards: 'backward',
+	    backwards: 'forward'
+	  };
+	  var roleReplacements = {
+	    forward: 'backward',
+	    backward: 'forward',
+	    forwards: 'backward',
+	    backwards: 'forward'
+	  };
+	  var onewayReplacements = {
+	    yes: '-1',
+	    '1': '-1',
+	    '-1': 'yes'
+	  };
+	  var compassReplacements = {
+	    N: 'S',
+	    NNE: 'SSW',
+	    NE: 'SW',
+	    ENE: 'WSW',
+	    E: 'W',
+	    ESE: 'WNW',
+	    SE: 'NW',
+	    SSE: 'NNW',
+	    S: 'N',
+	    SSW: 'NNE',
+	    SW: 'NE',
+	    WSW: 'ENE',
+	    W: 'E',
+	    WNW: 'ESE',
+	    NW: 'SE',
+	    NNW: 'SSE'
+	  };
+
+	  function reverseKey(key) {
+	    for (var i = 0; i < keyReplacements.length; ++i) {
+	      var replacement = keyReplacements[i];
+
+	      if (replacement[0].test(key)) {
+	        return key.replace(replacement[0], replacement[1]);
+	      }
+	    }
 
-	    var compassReplacements = {
-	        N: 'S',
-	        NNE: 'SSW',
-	        NE: 'SW',
-	        ENE: 'WSW',
-	        E: 'W',
-	        ESE: 'WNW',
-	        SE: 'NW',
-	        SSE: 'NNW',
-	        S: 'N',
-	        SSW: 'NNE',
-	        SW: 'NE',
-	        WSW: 'ENE',
-	        W: 'E',
-	        WNW: 'ESE',
-	        NW: 'SE',
-	        NNW: 'SSE'
-	    };
+	    return key;
+	  }
 
+	  function reverseValue(key, value, includeAbsolute) {
+	    if (ignoreKey.test(key)) return value; // Turn lanes are left/right to key (not way) direction - #5674
 
-	    function reverseKey(key) {
-	        for (var i = 0; i < keyReplacements.length; ++i) {
-	            var replacement = keyReplacements[i];
-	            if (replacement[0].test(key)) {
-	                return key.replace(replacement[0], replacement[1]);
-	            }
+	    if (turn_lanes.test(key)) {
+	      return value;
+	    } else if (key === 'incline' && numeric.test(value)) {
+	      return value.replace(numeric, function (_, sign) {
+	        return sign === '-' ? '' : '-';
+	      });
+	    } else if (options && options.reverseOneway && key === 'oneway') {
+	      return onewayReplacements[value] || value;
+	    } else if (includeAbsolute && directionKey.test(key)) {
+	      if (compassReplacements[value]) return compassReplacements[value];
+	      var degrees = parseFloat(value);
+
+	      if (typeof degrees === 'number' && !isNaN(degrees)) {
+	        if (degrees < 180) {
+	          degrees += 180;
+	        } else {
+	          degrees -= 180;
 	        }
-	        return key;
-	    }
-
 
-	    function reverseValue(key, value, includeAbsolute) {
-	        if (ignoreKey.test(key)) { return value; }
-
-	        // Turn lanes are left/right to key (not way) direction - #5674
-	        if (turn_lanes.test(key)) {
-	            return value;
+	        return degrees.toString();
+	      }
+	    }
 
-	        } else if (key === 'incline' && numeric.test(value)) {
-	            return value.replace(numeric, function(_, sign) { return sign === '-' ? '' : '-'; });
+	    return valueReplacements[value] || value;
+	  } // Reverse the direction of tags attached to the nodes - #3076
 
-	        } else if (options && options.reverseOneway && key === 'oneway') {
-	            return onewayReplacements[value] || value;
 
-	        } else if (includeAbsolute && directionKey.test(key)) {
-	            if (compassReplacements[value]) { return compassReplacements[value]; }
+	  function reverseNodeTags(graph, nodeIDs) {
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var node = graph.hasEntity(nodeIDs[i]);
+	      if (!node || !Object.keys(node.tags).length) continue;
+	      var tags = {};
 
-	            var degrees = parseFloat(value);
-	            if (typeof degrees === 'number' && !isNaN(degrees)) {
-	                if (degrees < 180) {
-	                    degrees += 180;
-	                } else {
-	                    degrees -= 180;
-	                }
-	                return degrees.toString();
-	            }
-	        }
+	      for (var key in node.tags) {
+	        tags[reverseKey(key)] = reverseValue(key, node.tags[key], node.id === entityID);
+	      }
 
-	        return valueReplacements[value] || value;
+	      graph = graph.replace(node.update({
+	        tags: tags
+	      }));
 	    }
 
+	    return graph;
+	  }
 
-	    // Reverse the direction of tags attached to the nodes - #3076
-	    function reverseNodeTags(graph, nodeIDs) {
-	        for (var i = 0; i < nodeIDs.length; i++) {
-	            var node = graph.hasEntity(nodeIDs[i]);
-	            if (!node || !Object.keys(node.tags).length) { continue; }
+	  function reverseWay(graph, way) {
+	    var nodes = way.nodes.slice().reverse();
+	    var tags = {};
+	    var role;
 
-	            var tags = {};
-	            for (var key in node.tags) {
-	                tags[reverseKey(key)] = reverseValue(key, node.tags[key], node.id === entityID);
-	            }
-	            graph = graph.replace(node.update({tags: tags}));
-	        }
-	        return graph;
+	    for (var key in way.tags) {
+	      tags[reverseKey(key)] = reverseValue(key, way.tags[key]);
 	    }
 
-
-	    function reverseWay(graph, way) {
-	        var nodes = way.nodes.slice().reverse();
-	        var tags = {};
-	        var role;
-
-	        for (var key in way.tags) {
-	            tags[reverseKey(key)] = reverseValue(key, way.tags[key]);
+	    graph.parentRelations(way).forEach(function (relation) {
+	      relation.members.forEach(function (member, index) {
+	        if (member.id === way.id && (role = roleReplacements[member.role])) {
+	          relation = relation.updateMember({
+	            role: role
+	          }, index);
+	          graph = graph.replace(relation);
 	        }
+	      });
+	    }); // Reverse any associated directions on nodes on the way and then replace
+	    // the way itself with the reversed node ids and updated way tags
 
-	        graph.parentRelations(way).forEach(function(relation) {
-	            relation.members.forEach(function(member, index) {
-	                if (member.id === way.id && (role = roleReplacements[member.role])) {
-	                    relation = relation.updateMember({role: role}, index);
-	                    graph = graph.replace(relation);
-	                }
-	            });
-	        });
+	    return reverseNodeTags(graph, nodes).replace(way.update({
+	      nodes: nodes,
+	      tags: tags
+	    }));
+	  }
 
-	        // Reverse any associated directions on nodes on the way and then replace
-	        // the way itself with the reversed node ids and updated way tags
-	        return reverseNodeTags(graph, nodes)
-	            .replace(way.update({nodes: nodes, tags: tags}));
+	  var action = function action(graph) {
+	    var entity = graph.entity(entityID);
+
+	    if (entity.type === 'way') {
+	      return reverseWay(graph, entity);
 	    }
 
+	    return reverseNodeTags(graph, [entityID]);
+	  };
 
-	    var action = function(graph) {
-	        var entity = graph.entity(entityID);
-	        if (entity.type === 'way') {
-	            return reverseWay(graph, entity);
-	        }
-	        return reverseNodeTags(graph, [entityID]);
-	    };
+	  action.disabled = function (graph) {
+	    var entity = graph.hasEntity(entityID);
+	    if (!entity || entity.type === 'way') return false;
 
-	    action.disabled = function(graph) {
-	        var entity = graph.hasEntity(entityID);
-	        if (!entity || entity.type === 'way') { return false; }
+	    for (var key in entity.tags) {
+	      var value = entity.tags[key];
 
-	        for (var key in entity.tags) {
-	            var value = entity.tags[key];
-	            if (reverseKey(key) !== key || reverseValue(key, value, true) !== value) {
-	                return false;
-	            }
-	        }
-	        return 'nondirectional_node';
-	    };
+	      if (reverseKey(key) !== key || reverseValue(key, value, true) !== value) {
+	        return false;
+	      }
+	    }
 
-	    action.entityID = function() {
-	        return entityID;
-	    };
+	    return 'nondirectional_node';
+	  };
 
-	    return action;
+	  action.entityID = function () {
+	    return entityID;
+	  };
+
+	  return action;
 	}
 
 	function osmIsInterestingTag(key) {
-	    return key !== 'attribution' &&
-	        key !== 'created_by' &&
-	        key !== 'source' &&
-	        key !== 'odbl' &&
-	        key.indexOf('source:') !== 0 &&
-	        key.indexOf('source_ref') !== 0 && // purposely exclude colon
-	        key.indexOf('tiger:') !== 0;
+	  return key !== 'attribution' && key !== 'created_by' && key !== 'source' && key !== 'odbl' && key.indexOf('source:') !== 0 && key.indexOf('source_ref') !== 0 && // purposely exclude colon
+	  key.indexOf('tiger:') !== 0;
 	}
-
 	var osmAreaKeys = {};
 	function osmSetAreaKeys(value) {
-	    osmAreaKeys = value;
-	}
+	  osmAreaKeys = value;
+	} // returns an object with the tag from `tags` that implies an area geometry, if any
 
-	// returns an object with the tag from `tags` that implies an area geometry, if any
 	function osmTagSuggestingArea(tags) {
-	    if (tags.area === 'yes') { return { area: 'yes' }; }
-	    if (tags.area === 'no') { return null; }
-
-	    // `highway` and `railway` are typically linear features, but there
-	    // are a few exceptions that should be treated as areas, even in the
-	    // absence of a proper `area=yes` or `areaKeys` tag.. see #4194
-	    var lineKeys = {
-	        highway: {
-	            rest_area: true,
-	            services: true
-	        },
-	        railway: {
-	            roundhouse: true,
-	            station: true,
-	            traverser: true,
-	            turntable: true,
-	            wash: true
-	        }
-	    };
-	    var returnTags = {};
-	    for (var key in tags) {
-	        if (key in osmAreaKeys && !(tags[key] in osmAreaKeys[key])) {
-	            returnTags[key] = tags[key];
-	            return returnTags;
-	        }
-	        if (key in lineKeys && tags[key] in lineKeys[key]) {
-	            returnTags[key] = tags[key];
-	            return returnTags;
-	        }
+	  if (tags.area === 'yes') return {
+	    area: 'yes'
+	  };
+	  if (tags.area === 'no') return null; // `highway` and `railway` are typically linear features, but there
+	  // are a few exceptions that should be treated as areas, even in the
+	  // absence of a proper `area=yes` or `areaKeys` tag.. see #4194
+
+	  var lineKeys = {
+	    highway: {
+	      rest_area: true,
+	      services: true
+	    },
+	    railway: {
+	      roundhouse: true,
+	      station: true,
+	      traverser: true,
+	      turntable: true,
+	      wash: true
+	    }
+	  };
+	  var returnTags = {};
+
+	  for (var key in tags) {
+	    if (key in osmAreaKeys && !(tags[key] in osmAreaKeys[key])) {
+	      returnTags[key] = tags[key];
+	      return returnTags;
 	    }
-	    return null;
-	}
 
-	// Tags that indicate a node can be a standalone point
+	    if (key in lineKeys && tags[key] in lineKeys[key]) {
+	      returnTags[key] = tags[key];
+	      return returnTags;
+	    }
+	  }
+
+	  return null;
+	} // Tags that indicate a node can be a standalone point
 	// e.g. { amenity: { bar: true, parking: true, ... } ... }
+
 	var osmPointTags = {};
 	function osmSetPointTags(value) {
-	    osmPointTags = value;
-	}
-	// Tags that indicate a node can be part of a way
+	  osmPointTags = value;
+	} // Tags that indicate a node can be part of a way
 	// e.g. { amenity: { parking: true, ... }, highway: { stop: true ... } ... }
+
 	var osmVertexTags = {};
 	function osmSetVertexTags(value) {
-	    osmVertexTags = value;
+	  osmVertexTags = value;
 	}
-
 	function osmNodeGeometriesForTags(nodeTags) {
-	    var geometries = {};
-	    for (var key in nodeTags) {
-	        if (osmPointTags[key] &&
-	            (osmPointTags[key]['*'] || osmPointTags[key][nodeTags[key]])) {
-	            geometries.point = true;
-	        }
-	        if (osmVertexTags[key] &&
-	            (osmVertexTags[key]['*'] || osmVertexTags[key][nodeTags[key]])) {
-	            geometries.vertex = true;
-	        }
-	        // break early if both are already supported
-	        if (geometries.point && geometries.vertex) { break; }
+	  var geometries = {};
+
+	  for (var key in nodeTags) {
+	    if (osmPointTags[key] && (osmPointTags[key]['*'] || osmPointTags[key][nodeTags[key]])) {
+	      geometries.point = true;
 	    }
-	    return geometries;
-	}
 
+	    if (osmVertexTags[key] && (osmVertexTags[key]['*'] || osmVertexTags[key][nodeTags[key]])) {
+	      geometries.vertex = true;
+	    } // break early if both are already supported
+
+
+	    if (geometries.point && geometries.vertex) break;
+	  }
+
+	  return geometries;
+	}
 	var osmOneWayTags = {
-	    'aerialway': {
-	        'chair_lift': true,
-	        'drag_lift': true,
-	        'j-bar': true,
-	        'magic_carpet': true,
-	        'mixed_lift': true,
-	        'platter': true,
-	        'rope_tow': true,
-	        't-bar': true,
-	        'zip_line': true
-	    },
-	    'highway': {
-	        'motorway': true
-	    },
-	    'junction': {
-	        'circular': true,
-	        'roundabout': true
-	    },
-	    'man_made': {
-	        'goods_conveyor': true,
-	        'piste:halfpipe': true
-	    },
-	    'piste:type': {
-	        'downhill': true,
-	        'sled': true,
-	        'yes': true
-	    },
-	    'waterway': {
-	        'canal': true,
-	        'ditch': true,
-	        'drain': true,
-	        'fish_pass': true,
-	        'river': true,
-	        'stream': true,
-	        'tidal_channel': true
-	    }
-	};
+	  'aerialway': {
+	    'chair_lift': true,
+	    'drag_lift': true,
+	    'j-bar': true,
+	    'magic_carpet': true,
+	    'mixed_lift': true,
+	    'platter': true,
+	    'rope_tow': true,
+	    't-bar': true,
+	    'zip_line': true
+	  },
+	  'highway': {
+	    'motorway': true
+	  },
+	  'junction': {
+	    'circular': true,
+	    'roundabout': true
+	  },
+	  'man_made': {
+	    'goods_conveyor': true,
+	    'piste:halfpipe': true
+	  },
+	  'piste:type': {
+	    'downhill': true,
+	    'sled': true,
+	    'yes': true
+	  },
+	  'waterway': {
+	    'canal': true,
+	    'ditch': true,
+	    'drain': true,
+	    'fish_pass': true,
+	    'river': true,
+	    'stream': true,
+	    'tidal_channel': true
+	  }
+	}; // solid and smooth surfaces akin to the assumed default road surface in OSM
 
-	// solid and smooth surfaces akin to the assumed default road surface in OSM
 	var osmPavedTags = {
-	    'surface': {
-	        'paved': true,
-	        'asphalt': true,
-	        'concrete': true,
-	        'concrete:lanes': true,
-	        'concrete:plates': true
-	    },
-	    'tracktype': {
-	        'grade1': true
-	    }
-	};
+	  'surface': {
+	    'paved': true,
+	    'asphalt': true,
+	    'concrete': true,
+	    'concrete:lanes': true,
+	    'concrete:plates': true
+	  },
+	  'tracktype': {
+	    'grade1': true
+	  }
+	}; // solid, if somewhat uncommon surfaces with a high range of smoothness
 
-	// solid, if somewhat uncommon surfaces with a high range of smoothness
 	var osmSemipavedTags = {
-	    'surface': {
-	        'cobblestone': true,
-	        'cobblestone:flattened': true,
-	        'unhewn_cobblestone': true,
-	        'sett': true,
-	        'paving_stones': true,
-	        'metal': true,
-	        'wood': true
-	    }
+	  'surface': {
+	    'cobblestone': true,
+	    'cobblestone:flattened': true,
+	    'unhewn_cobblestone': true,
+	    'sett': true,
+	    'paving_stones': true,
+	    'metal': true,
+	    'wood': true
+	  }
 	};
-
 	var osmRightSideIsInsideTags = {
-	    'natural': {
-	        'cliff': true,
-	        'coastline': 'coastline',
-	    },
-	    'barrier': {
-	        'retaining_wall': true,
-	        'kerb': true,
-	        'guard_rail': true,
-	        'city_wall': true,
-	    },
-	    'man_made': {
-	        'embankment': true
-	    },
-	    'waterway': {
-	        'weir': true
-	    }
-	};
-
-	// "highway" tag values for pedestrian or vehicle right-of-ways that make up the routable network
+	  'natural': {
+	    'cliff': true,
+	    'coastline': 'coastline'
+	  },
+	  'barrier': {
+	    'retaining_wall': true,
+	    'kerb': true,
+	    'guard_rail': true,
+	    'city_wall': true
+	  },
+	  'man_made': {
+	    'embankment': true
+	  },
+	  'waterway': {
+	    'weir': true
+	  }
+	}; // "highway" tag values for pedestrian or vehicle right-of-ways that make up the routable network
 	// (does not include `raceway`)
+
 	var osmRoutableHighwayTagValues = {
-	    motorway: true, trunk: true, primary: true, secondary: true, tertiary: true, residential: true,
-	    motorway_link: true, trunk_link: true, primary_link: true, secondary_link: true, tertiary_link: true,
-	    unclassified: true, road: true, service: true, track: true, living_street: true, bus_guideway: true,
-	    path: true, footway: true, cycleway: true, bridleway: true, pedestrian: true, corridor: true, steps: true
-	};
-	// "highway" tag values that generally do not allow motor vehicles
+	  motorway: true,
+	  trunk: true,
+	  primary: true,
+	  secondary: true,
+	  tertiary: true,
+	  residential: true,
+	  motorway_link: true,
+	  trunk_link: true,
+	  primary_link: true,
+	  secondary_link: true,
+	  tertiary_link: true,
+	  unclassified: true,
+	  road: true,
+	  service: true,
+	  track: true,
+	  living_street: true,
+	  bus_guideway: true,
+	  path: true,
+	  footway: true,
+	  cycleway: true,
+	  bridleway: true,
+	  pedestrian: true,
+	  corridor: true,
+	  steps: true
+	}; // "highway" tag values that generally do not allow motor vehicles
+
 	var osmPathHighwayTagValues = {
-	    path: true, footway: true, cycleway: true, bridleway: true, pedestrian: true, corridor: true, steps: true
-	};
+	  path: true,
+	  footway: true,
+	  cycleway: true,
+	  bridleway: true,
+	  pedestrian: true,
+	  corridor: true,
+	  steps: true
+	}; // "railway" tag values representing existing railroad tracks (purposely does not include 'abandoned')
 
-	// "railway" tag values representing existing railroad tracks (purposely does not include 'abandoned')
 	var osmRailwayTrackTagValues = {
-	    rail: true, light_rail: true, tram: true, subway: true,
-	    monorail: true, funicular: true, miniature: true, narrow_gauge: true,
-	    disused: true, preserved: true
-	};
+	  rail: true,
+	  light_rail: true,
+	  tram: true,
+	  subway: true,
+	  monorail: true,
+	  funicular: true,
+	  miniature: true,
+	  narrow_gauge: true,
+	  disused: true,
+	  preserved: true
+	}; // "waterway" tag values for line features representing water flow
 
-	// "waterway" tag values for line features representing water flow
 	var osmFlowingWaterwayTagValues = {
-	    canal: true, ditch: true, drain: true, fish_pass: true, river: true, stream: true, tidal_channel: true
+	  canal: true,
+	  ditch: true,
+	  drain: true,
+	  fish_pass: true,
+	  river: true,
+	  stream: true,
+	  tidal_channel: true
 	};
 
-	// Adds floating point numbers with twice the normal precision.
-	// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and
-	// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)
-	// 305–363 (1997).
-	// Code adapted from GeographicLib by Charles F. F. Karney,
-	// http://geographiclib.sourceforge.net/
+	var trim$1 = stringTrim.trim;
 
-	function adder() {
-	  return new Adder;
-	}
 
-	function Adder() {
-	  this.reset();
-	}
+	var $parseInt = global_1.parseInt;
+	var hex$1 = /^[+-]?0[Xx]/;
+	var FORCED$9 = $parseInt(whitespaces + '08') !== 8 || $parseInt(whitespaces + '0x16') !== 22;
 
-	Adder.prototype = {
-	  constructor: Adder,
-	  reset: function() {
-	    this.s = // rounded value
-	    this.t = 0; // exact error
-	  },
-	  add: function(y) {
-	    add(temp, y, this.t);
-	    add(this, temp.s, this.s);
-	    if (this.s) { this.t += temp.t; }
-	    else { this.s = temp.t; }
-	  },
-	  valueOf: function() {
-	    return this.s;
-	  }
-	};
+	// `parseInt` method
+	// https://tc39.github.io/ecma262/#sec-parseint-string-radix
+	var numberParseInt = FORCED$9 ? function parseInt(string, radix) {
+	  var S = trim$1(String(string));
+	  return $parseInt(S, (radix >>> 0) || (hex$1.test(S) ? 16 : 10));
+	} : $parseInt;
 
-	var temp = new Adder;
+	// `parseInt` method
+	// https://tc39.github.io/ecma262/#sec-parseint-string-radix
+	_export({ global: true, forced: parseInt != numberParseInt }, {
+	  parseInt: numberParseInt
+	});
 
-	function add(adder, a, b) {
-	  var x = adder.s = a + b,
-	      bv = x - a,
-	      av = x - bv;
-	  adder.t = (a - av) + (b - bv);
-	}
+	var freezing = !fails(function () {
+	  return Object.isExtensible(Object.preventExtensions({}));
+	});
 
-	var epsilon = 1e-6;
-	var epsilon2 = 1e-12;
-	var pi = Math.PI;
-	var halfPi = pi / 2;
-	var quarterPi = pi / 4;
-	var tau = pi * 2;
+	var internalMetadata = createCommonjsModule(function (module) {
+	var defineProperty = objectDefineProperty.f;
 
-	var degrees = 180 / pi;
-	var radians = pi / 180;
 
-	var abs$2 = Math.abs;
-	var atan = Math.atan;
-	var atan2 = Math.atan2;
-	var cos = Math.cos;
-	var exp = Math.exp;
-	var log = Math.log;
-	var sin = Math.sin;
-	var sign$2 = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };
-	var sqrt = Math.sqrt;
-	var tan = Math.tan;
 
-	function acos(x) {
-	  return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
-	}
+	var METADATA = uid('meta');
+	var id = 0;
 
-	function asin(x) {
-	  return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
-	}
+	var isExtensible = Object.isExtensible || function () {
+	  return true;
+	};
 
-	function noop$2() {}
+	var setMetadata = function (it) {
+	  defineProperty(it, METADATA, { value: {
+	    objectID: 'O' + ++id, // object ID
+	    weakData: {}          // weak collections IDs
+	  } });
+	};
 
-	function streamGeometry(geometry, stream) {
-	  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
-	    streamGeometryType[geometry.type](geometry, stream);
-	  }
-	}
+	var fastKey = function (it, create) {
+	  // return a primitive with prefix
+	  if (!isObject(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;
+	  if (!has(it, METADATA)) {
+	    // can't set metadata to uncaught frozen object
+	    if (!isExtensible(it)) return 'F';
+	    // not necessary to add metadata
+	    if (!create) return 'E';
+	    // add missing metadata
+	    setMetadata(it);
+	  // return object ID
+	  } return it[METADATA].objectID;
+	};
 
-	var streamObjectType = {
-	  Feature: function(object, stream) {
-	    streamGeometry(object.geometry, stream);
-	  },
-	  FeatureCollection: function(object, stream) {
-	    var features = object.features, i = -1, n = features.length;
-	    while (++i < n) { streamGeometry(features[i].geometry, stream); }
-	  }
+	var getWeakData = function (it, create) {
+	  if (!has(it, METADATA)) {
+	    // can't set metadata to uncaught frozen object
+	    if (!isExtensible(it)) return true;
+	    // not necessary to add metadata
+	    if (!create) return false;
+	    // add missing metadata
+	    setMetadata(it);
+	  // return the store of weak collections IDs
+	  } return it[METADATA].weakData;
 	};
 
-	var streamGeometryType = {
-	  Sphere: function(object, stream) {
-	    stream.sphere();
-	  },
-	  Point: function(object, stream) {
-	    object = object.coordinates;
-	    stream.point(object[0], object[1], object[2]);
-	  },
-	  MultiPoint: function(object, stream) {
-	    var coordinates = object.coordinates, i = -1, n = coordinates.length;
-	    while (++i < n) { object = coordinates[i], stream.point(object[0], object[1], object[2]); }
-	  },
-	  LineString: function(object, stream) {
-	    streamLine(object.coordinates, stream, 0);
-	  },
-	  MultiLineString: function(object, stream) {
-	    var coordinates = object.coordinates, i = -1, n = coordinates.length;
-	    while (++i < n) { streamLine(coordinates[i], stream, 0); }
-	  },
-	  Polygon: function(object, stream) {
-	    streamPolygon(object.coordinates, stream);
-	  },
-	  MultiPolygon: function(object, stream) {
-	    var coordinates = object.coordinates, i = -1, n = coordinates.length;
-	    while (++i < n) { streamPolygon(coordinates[i], stream); }
-	  },
-	  GeometryCollection: function(object, stream) {
-	    var geometries = object.geometries, i = -1, n = geometries.length;
-	    while (++i < n) { streamGeometry(geometries[i], stream); }
-	  }
+	// add metadata on freeze-family methods calling
+	var onFreeze = function (it) {
+	  if (freezing && meta.REQUIRED && isExtensible(it) && !has(it, METADATA)) setMetadata(it);
+	  return it;
 	};
 
-	function streamLine(coordinates, stream, closed) {
-	  var i = -1, n = coordinates.length - closed, coordinate;
-	  stream.lineStart();
-	  while (++i < n) { coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]); }
-	  stream.lineEnd();
-	}
+	var meta = module.exports = {
+	  REQUIRED: false,
+	  fastKey: fastKey,
+	  getWeakData: getWeakData,
+	  onFreeze: onFreeze
+	};
 
-	function streamPolygon(coordinates, stream) {
-	  var i = -1, n = coordinates.length;
-	  stream.polygonStart();
-	  while (++i < n) { streamLine(coordinates[i], stream, 1); }
-	  stream.polygonEnd();
-	}
+	hiddenKeys[METADATA] = true;
+	});
 
-	function d3_geoStream(object, stream) {
-	  if (object && streamObjectType.hasOwnProperty(object.type)) {
-	    streamObjectType[object.type](object, stream);
-	  } else {
-	    streamGeometry(object, stream);
-	  }
-	}
+	var collection = function (CONSTRUCTOR_NAME, wrapper, common) {
+	  var IS_MAP = CONSTRUCTOR_NAME.indexOf('Map') !== -1;
+	  var IS_WEAK = CONSTRUCTOR_NAME.indexOf('Weak') !== -1;
+	  var ADDER = IS_MAP ? 'set' : 'add';
+	  var NativeConstructor = global_1[CONSTRUCTOR_NAME];
+	  var NativePrototype = NativeConstructor && NativeConstructor.prototype;
+	  var Constructor = NativeConstructor;
+	  var exported = {};
+
+	  var fixMethod = function (KEY) {
+	    var nativeMethod = NativePrototype[KEY];
+	    redefine(NativePrototype, KEY,
+	      KEY == 'add' ? function add(value) {
+	        nativeMethod.call(this, value === 0 ? 0 : value);
+	        return this;
+	      } : KEY == 'delete' ? function (key) {
+	        return IS_WEAK && !isObject(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
+	      } : KEY == 'get' ? function get(key) {
+	        return IS_WEAK && !isObject(key) ? undefined : nativeMethod.call(this, key === 0 ? 0 : key);
+	      } : KEY == 'has' ? function has(key) {
+	        return IS_WEAK && !isObject(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
+	      } : function set(key, value) {
+	        nativeMethod.call(this, key === 0 ? 0 : key, value);
+	        return this;
+	      }
+	    );
+	  };
 
-	var areaRingSum = adder();
+	  // eslint-disable-next-line max-len
+	  if (isForced_1(CONSTRUCTOR_NAME, typeof NativeConstructor != 'function' || !(IS_WEAK || NativePrototype.forEach && !fails(function () {
+	    new NativeConstructor().entries().next();
+	  })))) {
+	    // create collection constructor
+	    Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);
+	    internalMetadata.REQUIRED = true;
+	  } else if (isForced_1(CONSTRUCTOR_NAME, true)) {
+	    var instance = new Constructor();
+	    // early implementations not supports chaining
+	    var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;
+	    // V8 ~ Chromium 40- weak-collections throws on primitives, but should return false
+	    var THROWS_ON_PRIMITIVES = fails(function () { instance.has(1); });
+	    // most early implementations doesn't supports iterables, most modern - not close it correctly
+	    // eslint-disable-next-line no-new
+	    var ACCEPT_ITERABLES = checkCorrectnessOfIteration(function (iterable) { new NativeConstructor(iterable); });
+	    // for early implementations -0 and +0 not the same
+	    var BUGGY_ZERO = !IS_WEAK && fails(function () {
+	      // V8 ~ Chromium 42- fails only with 5+ elements
+	      var $instance = new NativeConstructor();
+	      var index = 5;
+	      while (index--) $instance[ADDER](index, index);
+	      return !$instance.has(-0);
+	    });
 
-	var areaSum = adder(),
-	    lambda00,
-	    phi00,
-	    lambda0,
-	    cosPhi0,
-	    sinPhi0;
+	    if (!ACCEPT_ITERABLES) {
+	      Constructor = wrapper(function (dummy, iterable) {
+	        anInstance(dummy, Constructor, CONSTRUCTOR_NAME);
+	        var that = inheritIfRequired(new NativeConstructor(), dummy, Constructor);
+	        if (iterable != undefined) iterate_1(iterable, that[ADDER], that, IS_MAP);
+	        return that;
+	      });
+	      Constructor.prototype = NativePrototype;
+	      NativePrototype.constructor = Constructor;
+	    }
 
-	var areaStream = {
-	  point: noop$2,
-	  lineStart: noop$2,
-	  lineEnd: noop$2,
-	  polygonStart: function() {
-	    areaRingSum.reset();
-	    areaStream.lineStart = areaRingStart;
-	    areaStream.lineEnd = areaRingEnd;
-	  },
-	  polygonEnd: function() {
-	    var areaRing = +areaRingSum;
-	    areaSum.add(areaRing < 0 ? tau + areaRing : areaRing);
-	    this.lineStart = this.lineEnd = this.point = noop$2;
-	  },
-	  sphere: function() {
-	    areaSum.add(tau);
+	    if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {
+	      fixMethod('delete');
+	      fixMethod('has');
+	      IS_MAP && fixMethod('get');
+	    }
+
+	    if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);
+
+	    // weak collections should not contains .clear method
+	    if (IS_WEAK && NativePrototype.clear) delete NativePrototype.clear;
 	  }
-	};
 
-	function areaRingStart() {
-	  areaStream.point = areaPointFirst;
-	}
+	  exported[CONSTRUCTOR_NAME] = Constructor;
+	  _export({ global: true, forced: Constructor != NativeConstructor }, exported);
 
-	function areaRingEnd() {
-	  areaPoint(lambda00, phi00);
-	}
+	  setToStringTag(Constructor, CONSTRUCTOR_NAME);
 
-	function areaPointFirst(lambda, phi) {
-	  areaStream.point = areaPoint;
-	  lambda00 = lambda, phi00 = phi;
-	  lambda *= radians, phi *= radians;
-	  lambda0 = lambda, cosPhi0 = cos(phi = phi / 2 + quarterPi), sinPhi0 = sin(phi);
-	}
+	  if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP);
 
-	function areaPoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  phi = phi / 2 + quarterPi; // half the angular distance from south pole
+	  return Constructor;
+	};
 
-	  // Spherical excess E for a spherical triangle with vertices: south pole,
-	  // previous point, current point.  Uses a formula derived from Cagnoli’s
-	  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
-	  var dLambda = lambda - lambda0,
-	      sdLambda = dLambda >= 0 ? 1 : -1,
-	      adLambda = sdLambda * dLambda,
-	      cosPhi = cos(phi),
-	      sinPhi = sin(phi),
-	      k = sinPhi0 * sinPhi,
-	      u = cosPhi0 * cosPhi + k * cos(adLambda),
-	      v = k * sdLambda * sin(adLambda);
-	  areaRingSum.add(atan2(v, u));
+	var defineProperty$8 = objectDefineProperty.f;
 
-	  // Advance the previous points.
-	  lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
-	}
 
-	function d3_geoArea(object) {
-	  areaSum.reset();
-	  d3_geoStream(object, areaStream);
-	  return areaSum * 2;
-	}
 
-	function spherical(cartesian) {
-	  return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
-	}
 
-	function cartesian(spherical) {
-	  var lambda = spherical[0], phi = spherical[1], cosPhi = cos(phi);
-	  return [cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi)];
-	}
 
-	function cartesianDot(a, b) {
-	  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
-	}
 
-	function cartesianCross(a, b) {
-	  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
-	}
 
-	// TODO return a
-	function cartesianAddInPlace(a, b) {
-	  a[0] += b[0], a[1] += b[1], a[2] += b[2];
-	}
 
-	function cartesianScale(vector, k) {
-	  return [vector[0] * k, vector[1] * k, vector[2] * k];
-	}
+	var fastKey = internalMetadata.fastKey;
 
-	// TODO return d
-	function cartesianNormalizeInPlace(d) {
-	  var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
-	  d[0] /= l, d[1] /= l, d[2] /= l;
-	}
 
-	var lambda0$1, phi0, lambda1, phi1, // bounds
-	    lambda2, // previous lambda-coordinate
-	    lambda00$1, phi00$1, // first point
-	    p0, // previous 3D point
-	    deltaSum = adder(),
-	    ranges,
-	    range;
+	var setInternalState$7 = internalState.set;
+	var internalStateGetterFor = internalState.getterFor;
 
-	var boundsStream = {
-	  point: boundsPoint,
-	  lineStart: boundsLineStart,
-	  lineEnd: boundsLineEnd,
-	  polygonStart: function() {
-	    boundsStream.point = boundsRingPoint;
-	    boundsStream.lineStart = boundsRingStart;
-	    boundsStream.lineEnd = boundsRingEnd;
-	    deltaSum.reset();
-	    areaStream.polygonStart();
-	  },
-	  polygonEnd: function() {
-	    areaStream.polygonEnd();
-	    boundsStream.point = boundsPoint;
-	    boundsStream.lineStart = boundsLineStart;
-	    boundsStream.lineEnd = boundsLineEnd;
-	    if (areaRingSum < 0) { lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90); }
-	    else if (deltaSum > epsilon) { phi1 = 90; }
-	    else if (deltaSum < -epsilon) { phi0 = -90; }
-	    range[0] = lambda0$1, range[1] = lambda1;
-	  },
-	  sphere: function() {
-	    lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
-	  }
-	};
+	var collectionStrong = {
+	  getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
+	    var C = wrapper(function (that, iterable) {
+	      anInstance(that, C, CONSTRUCTOR_NAME);
+	      setInternalState$7(that, {
+	        type: CONSTRUCTOR_NAME,
+	        index: objectCreate(null),
+	        first: undefined,
+	        last: undefined,
+	        size: 0
+	      });
+	      if (!descriptors) that.size = 0;
+	      if (iterable != undefined) iterate_1(iterable, that[ADDER], that, IS_MAP);
+	    });
 
-	function boundsPoint(lambda, phi) {
-	  ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
-	  if (phi < phi0) { phi0 = phi; }
-	  if (phi > phi1) { phi1 = phi; }
-	}
+	    var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);
 
-	function linePoint(lambda, phi) {
-	  var p = cartesian([lambda * radians, phi * radians]);
-	  if (p0) {
-	    var normal = cartesianCross(p0, p),
-	        equatorial = [normal[1], -normal[0], 0],
-	        inflection = cartesianCross(equatorial, normal);
-	    cartesianNormalizeInPlace(inflection);
-	    inflection = spherical(inflection);
-	    var delta = lambda - lambda2,
-	        sign = delta > 0 ? 1 : -1,
-	        lambdai = inflection[0] * degrees * sign,
-	        phii,
-	        antimeridian = abs$2(delta) > 180;
-	    if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
-	      phii = inflection[1] * degrees;
-	      if (phii > phi1) { phi1 = phii; }
-	    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
-	      phii = -inflection[1] * degrees;
-	      if (phii < phi0) { phi0 = phii; }
-	    } else {
-	      if (phi < phi0) { phi0 = phi; }
-	      if (phi > phi1) { phi1 = phi; }
-	    }
-	    if (antimeridian) {
-	      if (lambda < lambda2) {
-	        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) { lambda1 = lambda; }
+	    var define = function (that, key, value) {
+	      var state = getInternalState(that);
+	      var entry = getEntry(that, key);
+	      var previous, index;
+	      // change existing entry
+	      if (entry) {
+	        entry.value = value;
+	      // create new entry
 	      } else {
-	        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) { lambda0$1 = lambda; }
+	        state.last = entry = {
+	          index: index = fastKey(key, true),
+	          key: key,
+	          value: value,
+	          previous: previous = state.last,
+	          next: undefined,
+	          removed: false
+	        };
+	        if (!state.first) state.first = entry;
+	        if (previous) previous.next = entry;
+	        if (descriptors) state.size++;
+	        else that.size++;
+	        // add to index
+	        if (index !== 'F') state.index[index] = entry;
+	      } return that;
+	    };
+
+	    var getEntry = function (that, key) {
+	      var state = getInternalState(that);
+	      // fast case
+	      var index = fastKey(key);
+	      var entry;
+	      if (index !== 'F') return state.index[index];
+	      // frozen object case
+	      for (entry = state.first; entry; entry = entry.next) {
+	        if (entry.key == key) return entry;
 	      }
-	    } else {
-	      if (lambda1 >= lambda0$1) {
-	        if (lambda < lambda0$1) { lambda0$1 = lambda; }
-	        if (lambda > lambda1) { lambda1 = lambda; }
-	      } else {
-	        if (lambda > lambda2) {
-	          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) { lambda1 = lambda; }
-	        } else {
-	          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) { lambda0$1 = lambda; }
+	    };
+
+	    redefineAll(C.prototype, {
+	      // 23.1.3.1 Map.prototype.clear()
+	      // 23.2.3.2 Set.prototype.clear()
+	      clear: function clear() {
+	        var that = this;
+	        var state = getInternalState(that);
+	        var data = state.index;
+	        var entry = state.first;
+	        while (entry) {
+	          entry.removed = true;
+	          if (entry.previous) entry.previous = entry.previous.next = undefined;
+	          delete data[entry.index];
+	          entry = entry.next;
+	        }
+	        state.first = state.last = undefined;
+	        if (descriptors) state.size = 0;
+	        else that.size = 0;
+	      },
+	      // 23.1.3.3 Map.prototype.delete(key)
+	      // 23.2.3.4 Set.prototype.delete(value)
+	      'delete': function (key) {
+	        var that = this;
+	        var state = getInternalState(that);
+	        var entry = getEntry(that, key);
+	        if (entry) {
+	          var next = entry.next;
+	          var prev = entry.previous;
+	          delete state.index[entry.index];
+	          entry.removed = true;
+	          if (prev) prev.next = next;
+	          if (next) next.previous = prev;
+	          if (state.first == entry) state.first = next;
+	          if (state.last == entry) state.last = prev;
+	          if (descriptors) state.size--;
+	          else that.size--;
+	        } return !!entry;
+	      },
+	      // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
+	      // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
+	      forEach: function forEach(callbackfn /* , that = undefined */) {
+	        var state = getInternalState(this);
+	        var boundFunction = functionBindContext(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);
+	        var entry;
+	        while (entry = entry ? entry.next : state.first) {
+	          boundFunction(entry.value, entry.key, this);
+	          // revert to the last existing entry
+	          while (entry && entry.removed) entry = entry.previous;
 	        }
+	      },
+	      // 23.1.3.7 Map.prototype.has(key)
+	      // 23.2.3.7 Set.prototype.has(value)
+	      has: function has(key) {
+	        return !!getEntry(this, key);
 	      }
-	    }
-	  } else {
-	    ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
-	  }
-	  if (phi < phi0) { phi0 = phi; }
-	  if (phi > phi1) { phi1 = phi; }
-	  p0 = p, lambda2 = lambda;
-	}
-
-	function boundsLineStart() {
-	  boundsStream.point = linePoint;
-	}
+	    });
 
-	function boundsLineEnd() {
-	  range[0] = lambda0$1, range[1] = lambda1;
-	  boundsStream.point = boundsPoint;
-	  p0 = null;
-	}
+	    redefineAll(C.prototype, IS_MAP ? {
+	      // 23.1.3.6 Map.prototype.get(key)
+	      get: function get(key) {
+	        var entry = getEntry(this, key);
+	        return entry && entry.value;
+	      },
+	      // 23.1.3.9 Map.prototype.set(key, value)
+	      set: function set(key, value) {
+	        return define(this, key === 0 ? 0 : key, value);
+	      }
+	    } : {
+	      // 23.2.3.1 Set.prototype.add(value)
+	      add: function add(value) {
+	        return define(this, value = value === 0 ? 0 : value, value);
+	      }
+	    });
+	    if (descriptors) defineProperty$8(C.prototype, 'size', {
+	      get: function () {
+	        return getInternalState(this).size;
+	      }
+	    });
+	    return C;
+	  },
+	  setStrong: function (C, CONSTRUCTOR_NAME, IS_MAP) {
+	    var ITERATOR_NAME = CONSTRUCTOR_NAME + ' Iterator';
+	    var getInternalCollectionState = internalStateGetterFor(CONSTRUCTOR_NAME);
+	    var getInternalIteratorState = internalStateGetterFor(ITERATOR_NAME);
+	    // add .keys, .values, .entries, [@@iterator]
+	    // 23.1.3.4, 23.1.3.8, 23.1.3.11, 23.1.3.12, 23.2.3.5, 23.2.3.8, 23.2.3.10, 23.2.3.11
+	    defineIterator(C, CONSTRUCTOR_NAME, function (iterated, kind) {
+	      setInternalState$7(this, {
+	        type: ITERATOR_NAME,
+	        target: iterated,
+	        state: getInternalCollectionState(iterated),
+	        kind: kind,
+	        last: undefined
+	      });
+	    }, function () {
+	      var state = getInternalIteratorState(this);
+	      var kind = state.kind;
+	      var entry = state.last;
+	      // revert to the last existing entry
+	      while (entry && entry.removed) entry = entry.previous;
+	      // get next entry
+	      if (!state.target || !(state.last = entry = entry ? entry.next : state.state.first)) {
+	        // or finish the iteration
+	        state.target = undefined;
+	        return { value: undefined, done: true };
+	      }
+	      // return step by kind
+	      if (kind == 'keys') return { value: entry.key, done: false };
+	      if (kind == 'values') return { value: entry.value, done: false };
+	      return { value: [entry.key, entry.value], done: false };
+	    }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);
 
-	function boundsRingPoint(lambda, phi) {
-	  if (p0) {
-	    var delta = lambda - lambda2;
-	    deltaSum.add(abs$2(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
-	  } else {
-	    lambda00$1 = lambda, phi00$1 = phi;
+	    // add [@@species], 23.1.2.2, 23.2.2.2
+	    setSpecies(CONSTRUCTOR_NAME);
 	  }
-	  areaStream.point(lambda, phi);
-	  linePoint(lambda, phi);
-	}
+	};
 
-	function boundsRingStart() {
-	  areaStream.lineStart();
-	}
+	// `Set` constructor
+	// https://tc39.github.io/ecma262/#sec-set-objects
+	var es_set = collection('Set', function (init) {
+	  return function Set() { return init(this, arguments.length ? arguments[0] : undefined); };
+	}, collectionStrong);
 
-	function boundsRingEnd() {
-	  boundsRingPoint(lambda00$1, phi00$1);
-	  areaStream.lineEnd();
-	  if (abs$2(deltaSum) > epsilon) { lambda0$1 = -(lambda1 = 180); }
-	  range[0] = lambda0$1, range[1] = lambda1;
-	  p0 = null;
+	function d3_ascending (a, b) {
+	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
 	}
 
-	// Finds the left-right distance between two longitudes.
-	// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
-	// the distance between ±180° to be 360°.
-	function angle(lambda0, lambda1) {
-	  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
-	}
+	function d3_bisector (f) {
+	  var delta = f;
+	  var compare = f;
 
-	function rangeCompare(a, b) {
-	  return a[0] - b[0];
-	}
+	  if (f.length === 1) {
+	    delta = function delta(d, x) {
+	      return f(d) - x;
+	    };
 
-	function rangeContains(range, x) {
-	  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
-	}
+	    compare = ascendingComparator(f);
+	  }
 
-	function d3_geoBounds(feature) {
-	  var i, n, a, b, merged, deltaMax, delta;
+	  function left(a, x, lo, hi) {
+	    if (lo == null) lo = 0;
+	    if (hi == null) hi = a.length;
 
-	  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
-	  ranges = [];
-	  d3_geoStream(feature, boundsStream);
+	    while (lo < hi) {
+	      var mid = lo + hi >>> 1;
+	      if (compare(a[mid], x) < 0) lo = mid + 1;else hi = mid;
+	    }
 
-	  // First, sort ranges by their minimum longitudes.
-	  if (n = ranges.length) {
-	    ranges.sort(rangeCompare);
+	    return lo;
+	  }
 
-	    // Then, merge any ranges that overlap.
-	    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
-	      b = ranges[i];
-	      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
-	        if (angle(a[0], b[1]) > angle(a[0], a[1])) { a[1] = b[1]; }
-	        if (angle(b[0], a[1]) > angle(a[0], a[1])) { a[0] = b[0]; }
-	      } else {
-	        merged.push(a = b);
-	      }
+	  function right(a, x, lo, hi) {
+	    if (lo == null) lo = 0;
+	    if (hi == null) hi = a.length;
+
+	    while (lo < hi) {
+	      var mid = lo + hi >>> 1;
+	      if (compare(a[mid], x) > 0) hi = mid;else lo = mid + 1;
 	    }
 
-	    // Finally, find the largest gap between the merged ranges.
-	    // The final bounding box will be the inverse of this gap.
-	    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
-	      b = merged[i];
-	      if ((delta = angle(a[1], b[0])) > deltaMax) { deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1]; }
-	    }
+	    return lo;
 	  }
 
-	  ranges = range = null;
-
-	  return lambda0$1 === Infinity || phi0 === Infinity
-	      ? [[NaN, NaN], [NaN, NaN]]
-	      : [[lambda0$1, phi0], [lambda1, phi1]];
-	}
-
-	var W0, W1,
-	    X0, Y0, Z0,
-	    X1, Y1, Z1,
-	    X2, Y2, Z2,
-	    lambda00$2, phi00$2, // first point
-	    x0, y0, z0; // previous point
-
-	var centroidStream = {
-	  sphere: noop$2,
-	  point: centroidPoint,
-	  lineStart: centroidLineStart,
-	  lineEnd: centroidLineEnd,
-	  polygonStart: function() {
-	    centroidStream.lineStart = centroidRingStart;
-	    centroidStream.lineEnd = centroidRingEnd;
-	  },
-	  polygonEnd: function() {
-	    centroidStream.lineStart = centroidLineStart;
-	    centroidStream.lineEnd = centroidLineEnd;
+	  function center(a, x, lo, hi) {
+	    if (lo == null) lo = 0;
+	    if (hi == null) hi = a.length;
+	    var i = left(a, x, lo, hi - 1);
+	    return i > lo && delta(a[i - 1], x) > -delta(a[i], x) ? i - 1 : i;
 	  }
-	};
 
-	// Arithmetic mean of Cartesian vectors.
-	function centroidPoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var cosPhi = cos(phi);
-	  centroidPointCartesian(cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi));
+	  return {
+	    left: left,
+	    center: center,
+	    right: right
+	  };
 	}
 
-	function centroidPointCartesian(x, y, z) {
-	  ++W0;
-	  X0 += (x - X0) / W0;
-	  Y0 += (y - Y0) / W0;
-	  Z0 += (z - Z0) / W0;
+	function ascendingComparator(f) {
+	  return function (d, x) {
+	    return d3_ascending(f(d), x);
+	  };
 	}
 
-	function centroidLineStart() {
-	  centroidStream.point = centroidLinePointFirst;
-	}
+	// `Symbol.asyncIterator` well-known symbol
+	// https://tc39.github.io/ecma262/#sec-symbol.asynciterator
+	defineWellKnownSymbol('asyncIterator');
 
-	function centroidLinePointFirst(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var cosPhi = cos(phi);
-	  x0 = cosPhi * cos(lambda);
-	  y0 = cosPhi * sin(lambda);
-	  z0 = sin(phi);
-	  centroidStream.point = centroidLinePoint;
-	  centroidPointCartesian(x0, y0, z0);
-	}
+	var runtime_1 = createCommonjsModule(function (module) {
+	  /**
+	   * Copyright (c) 2014-present, Facebook, Inc.
+	   *
+	   * This source code is licensed under the MIT license found in the
+	   * LICENSE file in the root directory of this source tree.
+	   */
+	  var runtime = function (exports) {
+
+	    var Op = Object.prototype;
+	    var hasOwn = Op.hasOwnProperty;
+	    var undefined$1; // More compressible than void 0.
+
+	    var $Symbol = typeof Symbol === "function" ? Symbol : {};
+	    var iteratorSymbol = $Symbol.iterator || "@@iterator";
+	    var asyncIteratorSymbol = $Symbol.asyncIterator || "@@asyncIterator";
+	    var toStringTagSymbol = $Symbol.toStringTag || "@@toStringTag";
+
+	    function define(obj, key, value) {
+	      Object.defineProperty(obj, key, {
+	        value: value,
+	        enumerable: true,
+	        configurable: true,
+	        writable: true
+	      });
+	      return obj[key];
+	    }
 
-	function centroidLinePoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var cosPhi = cos(phi),
-	      x = cosPhi * cos(lambda),
-	      y = cosPhi * sin(lambda),
-	      z = sin(phi),
-	      w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
-	  W1 += w;
-	  X1 += w * (x0 + (x0 = x));
-	  Y1 += w * (y0 + (y0 = y));
-	  Z1 += w * (z0 + (z0 = z));
-	  centroidPointCartesian(x0, y0, z0);
-	}
+	    try {
+	      // IE 8 has a broken Object.defineProperty that only works on DOM objects.
+	      define({}, "");
+	    } catch (err) {
+	      define = function define(obj, key, value) {
+	        return obj[key] = value;
+	      };
+	    }
 
-	function centroidLineEnd() {
-	  centroidStream.point = centroidPoint;
-	}
+	    function wrap(innerFn, outerFn, self, tryLocsList) {
+	      // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.
+	      var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;
+	      var generator = Object.create(protoGenerator.prototype);
+	      var context = new Context(tryLocsList || []); // The ._invoke method unifies the implementations of the .next,
+	      // .throw, and .return methods.
 
-	// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
-	// J. Applied Mechanics 42, 239 (1975).
-	function centroidRingStart() {
-	  centroidStream.point = centroidRingPointFirst;
-	}
+	      generator._invoke = makeInvokeMethod(innerFn, self, context);
+	      return generator;
+	    }
 
-	function centroidRingEnd() {
-	  centroidRingPoint(lambda00$2, phi00$2);
-	  centroidStream.point = centroidPoint;
-	}
+	    exports.wrap = wrap; // Try/catch helper to minimize deoptimizations. Returns a completion
+	    // record like context.tryEntries[i].completion. This interface could
+	    // have been (and was previously) designed to take a closure to be
+	    // invoked without arguments, but in all the cases we care about we
+	    // already have an existing method we want to call, so there's no need
+	    // to create a new function object. We can even get away with assuming
+	    // the method takes exactly one argument, since that happens to be true
+	    // in every case, so we don't have to touch the arguments object. The
+	    // only additional allocation required is the completion record, which
+	    // has a stable shape and so hopefully should be cheap to allocate.
 
-	function centroidRingPointFirst(lambda, phi) {
-	  lambda00$2 = lambda, phi00$2 = phi;
-	  lambda *= radians, phi *= radians;
-	  centroidStream.point = centroidRingPoint;
-	  var cosPhi = cos(phi);
-	  x0 = cosPhi * cos(lambda);
-	  y0 = cosPhi * sin(lambda);
-	  z0 = sin(phi);
-	  centroidPointCartesian(x0, y0, z0);
-	}
+	    function tryCatch(fn, obj, arg) {
+	      try {
+	        return {
+	          type: "normal",
+	          arg: fn.call(obj, arg)
+	        };
+	      } catch (err) {
+	        return {
+	          type: "throw",
+	          arg: err
+	        };
+	      }
+	    }
 
-	function centroidRingPoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var cosPhi = cos(phi),
-	      x = cosPhi * cos(lambda),
-	      y = cosPhi * sin(lambda),
-	      z = sin(phi),
-	      cx = y0 * z - z0 * y,
-	      cy = z0 * x - x0 * z,
-	      cz = x0 * y - y0 * x,
-	      m = sqrt(cx * cx + cy * cy + cz * cz),
-	      w = asin(m), // line weight = angle
-	      v = m && -w / m; // area weight multiplier
-	  X2 += v * cx;
-	  Y2 += v * cy;
-	  Z2 += v * cz;
-	  W1 += w;
-	  X1 += w * (x0 + (x0 = x));
-	  Y1 += w * (y0 + (y0 = y));
-	  Z1 += w * (z0 + (z0 = z));
-	  centroidPointCartesian(x0, y0, z0);
-	}
+	    var GenStateSuspendedStart = "suspendedStart";
+	    var GenStateSuspendedYield = "suspendedYield";
+	    var GenStateExecuting = "executing";
+	    var GenStateCompleted = "completed"; // Returning this object from the innerFn has the same effect as
+	    // breaking out of the dispatch switch statement.
 
-	function d3_geoCentroid(object) {
-	  W0 = W1 =
-	  X0 = Y0 = Z0 =
-	  X1 = Y1 = Z1 =
-	  X2 = Y2 = Z2 = 0;
-	  d3_geoStream(object, centroidStream);
+	    var ContinueSentinel = {}; // Dummy constructor functions that we use as the .constructor and
+	    // .constructor.prototype properties for functions that return Generator
+	    // objects. For full spec compliance, you may wish to configure your
+	    // minifier not to mangle the names of these two functions.
 
-	  var x = X2,
-	      y = Y2,
-	      z = Z2,
-	      m = x * x + y * y + z * z;
+	    function Generator() {}
 
-	  // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
-	  if (m < epsilon2) {
-	    x = X1, y = Y1, z = Z1;
-	    // If the feature has zero length, fall back to arithmetic mean of point vectors.
-	    if (W1 < epsilon) { x = X0, y = Y0, z = Z0; }
-	    m = x * x + y * y + z * z;
-	    // If the feature still has an undefined ccentroid, then return.
-	    if (m < epsilon2) { return [NaN, NaN]; }
-	  }
+	    function GeneratorFunction() {}
 
-	  return [atan2(y, x) * degrees, asin(z / sqrt(m)) * degrees];
-	}
+	    function GeneratorFunctionPrototype() {} // This is a polyfill for %IteratorPrototype% for environments that
+	    // don't natively support it.
 
-	function compose(a, b) {
 
-	  function compose(x, y) {
-	    return x = a(x, y), b(x[0], x[1]);
-	  }
+	    var IteratorPrototype = {};
 
-	  if (a.invert && b.invert) { compose.invert = function(x, y) {
-	    return x = b.invert(x, y), x && a.invert(x[0], x[1]);
-	  }; }
+	    IteratorPrototype[iteratorSymbol] = function () {
+	      return this;
+	    };
 
-	  return compose;
-	}
+	    var getProto = Object.getPrototypeOf;
+	    var NativeIteratorPrototype = getProto && getProto(getProto(values([])));
 
-	function rotationIdentity(lambda, phi) {
-	  return [abs$2(lambda) > pi ? lambda + Math.round(-lambda / tau) * tau : lambda, phi];
-	}
+	    if (NativeIteratorPrototype && NativeIteratorPrototype !== Op && hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {
+	      // This environment has a native %IteratorPrototype%; use it instead
+	      // of the polyfill.
+	      IteratorPrototype = NativeIteratorPrototype;
+	    }
 
-	rotationIdentity.invert = rotationIdentity;
+	    var Gp = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(IteratorPrototype);
+	    GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;
+	    GeneratorFunctionPrototype.constructor = GeneratorFunction;
+	    GeneratorFunction.displayName = define(GeneratorFunctionPrototype, toStringTagSymbol, "GeneratorFunction"); // Helper for defining the .next, .throw, and .return methods of the
+	    // Iterator interface in terms of a single ._invoke method.
 
-	function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
-	  return (deltaLambda %= tau) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))
-	    : rotationLambda(deltaLambda))
-	    : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)
-	    : rotationIdentity);
-	}
+	    function defineIteratorMethods(prototype) {
+	      ["next", "throw", "return"].forEach(function (method) {
+	        define(prototype, method, function (arg) {
+	          return this._invoke(method, arg);
+	        });
+	      });
+	    }
 
-	function forwardRotationLambda(deltaLambda) {
-	  return function(lambda, phi) {
-	    return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
-	  };
-	}
+	    exports.isGeneratorFunction = function (genFun) {
+	      var ctor = typeof genFun === "function" && genFun.constructor;
+	      return ctor ? ctor === GeneratorFunction || // For the native GeneratorFunction constructor, the best we can
+	      // do is to check its .name property.
+	      (ctor.displayName || ctor.name) === "GeneratorFunction" : false;
+	    };
 
-	function rotationLambda(deltaLambda) {
-	  var rotation = forwardRotationLambda(deltaLambda);
-	  rotation.invert = forwardRotationLambda(-deltaLambda);
-	  return rotation;
-	}
+	    exports.mark = function (genFun) {
+	      if (Object.setPrototypeOf) {
+	        Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);
+	      } else {
+	        genFun.__proto__ = GeneratorFunctionPrototype;
+	        define(genFun, toStringTagSymbol, "GeneratorFunction");
+	      }
 
-	function rotationPhiGamma(deltaPhi, deltaGamma) {
-	  var cosDeltaPhi = cos(deltaPhi),
-	      sinDeltaPhi = sin(deltaPhi),
-	      cosDeltaGamma = cos(deltaGamma),
-	      sinDeltaGamma = sin(deltaGamma);
+	      genFun.prototype = Object.create(Gp);
+	      return genFun;
+	    }; // Within the body of any async function, `await x` is transformed to
+	    // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test
+	    // `hasOwn.call(value, "__await")` to determine if the yielded value is
+	    // meant to be awaited.
 
-	  function rotation(lambda, phi) {
-	    var cosPhi = cos(phi),
-	        x = cos(lambda) * cosPhi,
-	        y = sin(lambda) * cosPhi,
-	        z = sin(phi),
-	        k = z * cosDeltaPhi + x * sinDeltaPhi;
-	    return [
-	      atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),
-	      asin(k * cosDeltaGamma + y * sinDeltaGamma)
-	    ];
-	  }
 
-	  rotation.invert = function(lambda, phi) {
-	    var cosPhi = cos(phi),
-	        x = cos(lambda) * cosPhi,
-	        y = sin(lambda) * cosPhi,
-	        z = sin(phi),
-	        k = z * cosDeltaGamma - y * sinDeltaGamma;
-	    return [
-	      atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),
-	      asin(k * cosDeltaPhi - x * sinDeltaPhi)
-	    ];
-	  };
+	    exports.awrap = function (arg) {
+	      return {
+	        __await: arg
+	      };
+	    };
 
-	  return rotation;
-	}
+	    function AsyncIterator(generator, PromiseImpl) {
+	      function invoke(method, arg, resolve, reject) {
+	        var record = tryCatch(generator[method], generator, arg);
 
-	function rotation(rotate) {
-	  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
+	        if (record.type === "throw") {
+	          reject(record.arg);
+	        } else {
+	          var result = record.arg;
+	          var value = result.value;
+
+	          if (value && _typeof(value) === "object" && hasOwn.call(value, "__await")) {
+	            return PromiseImpl.resolve(value.__await).then(function (value) {
+	              invoke("next", value, resolve, reject);
+	            }, function (err) {
+	              invoke("throw", err, resolve, reject);
+	            });
+	          }
 
-	  function forward(coordinates) {
-	    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
-	    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
-	  }
+	          return PromiseImpl.resolve(value).then(function (unwrapped) {
+	            // When a yielded Promise is resolved, its final value becomes
+	            // the .value of the Promise<{value,done}> result for the
+	            // current iteration.
+	            result.value = unwrapped;
+	            resolve(result);
+	          }, function (error) {
+	            // If a rejected Promise was yielded, throw the rejection back
+	            // into the async generator function so it can be handled there.
+	            return invoke("throw", error, resolve, reject);
+	          });
+	        }
+	      }
 
-	  forward.invert = function(coordinates) {
-	    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
-	    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
-	  };
+	      var previousPromise;
 
-	  return forward;
-	}
+	      function enqueue(method, arg) {
+	        function callInvokeWithMethodAndArg() {
+	          return new PromiseImpl(function (resolve, reject) {
+	            invoke(method, arg, resolve, reject);
+	          });
+	        }
 
-	// Generates a circle centered at [0°, 0°], with a given radius and precision.
-	function circleStream(stream, radius, delta, direction, t0, t1) {
-	  if (!delta) { return; }
-	  var cosRadius = cos(radius),
-	      sinRadius = sin(radius),
-	      step = direction * delta;
-	  if (t0 == null) {
-	    t0 = radius + direction * tau;
-	    t1 = radius - step / 2;
-	  } else {
-	    t0 = circleRadius(cosRadius, t0);
-	    t1 = circleRadius(cosRadius, t1);
-	    if (direction > 0 ? t0 < t1 : t0 > t1) { t0 += direction * tau; }
-	  }
-	  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
-	    point = spherical([cosRadius, -sinRadius * cos(t), -sinRadius * sin(t)]);
-	    stream.point(point[0], point[1]);
-	  }
-	}
+	        return previousPromise = // If enqueue has been called before, then we want to wait until
+	        // all previous Promises have been resolved before calling invoke,
+	        // so that results are always delivered in the correct order. If
+	        // enqueue has not been called before, then it is important to
+	        // call invoke immediately, without waiting on a callback to fire,
+	        // so that the async generator function has the opportunity to do
+	        // any necessary setup in a predictable way. This predictability
+	        // is why the Promise constructor synchronously invokes its
+	        // executor callback, and why async functions synchronously
+	        // execute code before the first await. Since we implement simple
+	        // async functions in terms of async generators, it is especially
+	        // important to get this right, even though it requires care.
+	        previousPromise ? previousPromise.then(callInvokeWithMethodAndArg, // Avoid propagating failures to Promises returned by later
+	        // invocations of the iterator.
+	        callInvokeWithMethodAndArg) : callInvokeWithMethodAndArg();
+	      } // Define the unified helper method that is used to implement .next,
+	      // .throw, and .return (see defineIteratorMethods).
 
-	// Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
-	function circleRadius(cosRadius, point) {
-	  point = cartesian(point), point[0] -= cosRadius;
-	  cartesianNormalizeInPlace(point);
-	  var radius = acos(-point[1]);
-	  return ((-point[2] < 0 ? -radius : radius) + tau - epsilon) % tau;
-	}
 
-	function clipBuffer() {
-	  var lines = [],
-	      line;
-	  return {
-	    point: function(x, y, m) {
-	      line.push([x, y, m]);
-	    },
-	    lineStart: function() {
-	      lines.push(line = []);
-	    },
-	    lineEnd: noop$2,
-	    rejoin: function() {
-	      if (lines.length > 1) { lines.push(lines.pop().concat(lines.shift())); }
-	    },
-	    result: function() {
-	      var result = lines;
-	      lines = [];
-	      line = null;
-	      return result;
+	      this._invoke = enqueue;
 	    }
-	  };
-	}
-
-	function pointEqual(a, b) {
-	  return abs$2(a[0] - b[0]) < epsilon && abs$2(a[1] - b[1]) < epsilon;
-	}
 
-	function Intersection(point, points, other, entry) {
-	  this.x = point;
-	  this.z = points;
-	  this.o = other; // another intersection
-	  this.e = entry; // is an entry?
-	  this.v = false; // visited
-	  this.n = this.p = null; // next & previous
-	}
+	    defineIteratorMethods(AsyncIterator.prototype);
 
-	// A generalized polygon clipping algorithm: given a polygon that has been cut
-	// into its visible line segments, and rejoins the segments by interpolating
-	// along the clip edge.
-	function clipRejoin(segments, compareIntersection, startInside, interpolate, stream) {
-	  var subject = [],
-	      clip = [],
-	      i,
-	      n;
+	    AsyncIterator.prototype[asyncIteratorSymbol] = function () {
+	      return this;
+	    };
 
-	  segments.forEach(function(segment) {
-	    if ((n = segment.length - 1) <= 0) { return; }
-	    var n, p0 = segment[0], p1 = segment[n], x;
+	    exports.AsyncIterator = AsyncIterator; // Note that simple async functions are implemented on top of
+	    // AsyncIterator objects; they just return a Promise for the value of
+	    // the final result produced by the iterator.
 
-	    if (pointEqual(p0, p1)) {
-	      if (!p0[2] && !p1[2]) {
-	        stream.lineStart();
-	        for (i = 0; i < n; ++i) { stream.point((p0 = segment[i])[0], p0[1]); }
-	        stream.lineEnd();
-	        return;
-	      }
-	      // handle degenerate cases by moving the point
-	      p1[0] += 2 * epsilon;
-	    }
+	    exports.async = function (innerFn, outerFn, self, tryLocsList, PromiseImpl) {
+	      if (PromiseImpl === void 0) PromiseImpl = Promise;
+	      var iter = new AsyncIterator(wrap(innerFn, outerFn, self, tryLocsList), PromiseImpl);
+	      return exports.isGeneratorFunction(outerFn) ? iter // If outerFn is a generator, return the full iterator.
+	      : iter.next().then(function (result) {
+	        return result.done ? result.value : iter.next();
+	      });
+	    };
 
-	    subject.push(x = new Intersection(p0, segment, null, true));
-	    clip.push(x.o = new Intersection(p0, null, x, false));
-	    subject.push(x = new Intersection(p1, segment, null, false));
-	    clip.push(x.o = new Intersection(p1, null, x, true));
-	  });
+	    function makeInvokeMethod(innerFn, self, context) {
+	      var state = GenStateSuspendedStart;
+	      return function invoke(method, arg) {
+	        if (state === GenStateExecuting) {
+	          throw new Error("Generator is already running");
+	        }
 
-	  if (!subject.length) { return; }
+	        if (state === GenStateCompleted) {
+	          if (method === "throw") {
+	            throw arg;
+	          } // Be forgiving, per 25.3.3.3.3 of the spec:
+	          // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume
 
-	  clip.sort(compareIntersection);
-	  link(subject);
-	  link(clip);
 
-	  for (i = 0, n = clip.length; i < n; ++i) {
-	    clip[i].e = startInside = !startInside;
-	  }
+	          return doneResult();
+	        }
 
-	  var start = subject[0],
-	      points,
-	      point;
+	        context.method = method;
+	        context.arg = arg;
 
-	  while (1) {
-	    // Find first unvisited intersection.
-	    var current = start,
-	        isSubject = true;
-	    while (current.v) { if ((current = current.n) === start) { return; } }
-	    points = current.z;
-	    stream.lineStart();
-	    do {
-	      current.v = current.o.v = true;
-	      if (current.e) {
-	        if (isSubject) {
-	          for (i = 0, n = points.length; i < n; ++i) { stream.point((point = points[i])[0], point[1]); }
-	        } else {
-	          interpolate(current.x, current.n.x, 1, stream);
-	        }
-	        current = current.n;
-	      } else {
-	        if (isSubject) {
-	          points = current.p.z;
-	          for (i = points.length - 1; i >= 0; --i) { stream.point((point = points[i])[0], point[1]); }
-	        } else {
-	          interpolate(current.x, current.p.x, -1, stream);
-	        }
-	        current = current.p;
-	      }
-	      current = current.o;
-	      points = current.z;
-	      isSubject = !isSubject;
-	    } while (!current.v);
-	    stream.lineEnd();
-	  }
-	}
+	        while (true) {
+	          var delegate = context.delegate;
 
-	function link(array) {
-	  if (!(n = array.length)) { return; }
-	  var n,
-	      i = 0,
-	      a = array[0],
-	      b;
-	  while (++i < n) {
-	    a.n = b = array[i];
-	    b.p = a;
-	    a = b;
-	  }
-	  a.n = b = array[0];
-	  b.p = a;
-	}
+	          if (delegate) {
+	            var delegateResult = maybeInvokeDelegate(delegate, context);
 
-	var sum = adder();
+	            if (delegateResult) {
+	              if (delegateResult === ContinueSentinel) continue;
+	              return delegateResult;
+	            }
+	          }
 
-	function longitude(point) {
-	  if (abs$2(point[0]) <= pi)
-	    { return point[0]; }
-	  else
-	    { return sign$2(point[0]) * ((abs$2(point[0]) + pi) % tau - pi); }
-	}
+	          if (context.method === "next") {
+	            // Setting context._sent for legacy support of Babel's
+	            // function.sent implementation.
+	            context.sent = context._sent = context.arg;
+	          } else if (context.method === "throw") {
+	            if (state === GenStateSuspendedStart) {
+	              state = GenStateCompleted;
+	              throw context.arg;
+	            }
 
-	function polygonContains(polygon, point) {
-	  var lambda = longitude(point),
-	      phi = point[1],
-	      sinPhi = sin(phi),
-	      normal = [sin(lambda), -cos(lambda), 0],
-	      angle = 0,
-	      winding = 0;
+	            context.dispatchException(context.arg);
+	          } else if (context.method === "return") {
+	            context.abrupt("return", context.arg);
+	          }
 
-	  sum.reset();
+	          state = GenStateExecuting;
+	          var record = tryCatch(innerFn, self, context);
 
-	  if (sinPhi === 1) { phi = halfPi + epsilon; }
-	  else if (sinPhi === -1) { phi = -halfPi - epsilon; }
+	          if (record.type === "normal") {
+	            // If an exception is thrown from innerFn, we leave state ===
+	            // GenStateExecuting and loop back for another invocation.
+	            state = context.done ? GenStateCompleted : GenStateSuspendedYield;
 
-	  for (var i = 0, n = polygon.length; i < n; ++i) {
-	    if (!(m = (ring = polygon[i]).length)) { continue; }
-	    var ring,
-	        m,
-	        point0 = ring[m - 1],
-	        lambda0 = longitude(point0),
-	        phi0 = point0[1] / 2 + quarterPi,
-	        sinPhi0 = sin(phi0),
-	        cosPhi0 = cos(phi0);
+	            if (record.arg === ContinueSentinel) {
+	              continue;
+	            }
 
-	    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
-	      var point1 = ring[j],
-	          lambda1 = longitude(point1),
-	          phi1 = point1[1] / 2 + quarterPi,
-	          sinPhi1 = sin(phi1),
-	          cosPhi1 = cos(phi1),
-	          delta = lambda1 - lambda0,
-	          sign = delta >= 0 ? 1 : -1,
-	          absDelta = sign * delta,
-	          antimeridian = absDelta > pi,
-	          k = sinPhi0 * sinPhi1;
+	            return {
+	              value: record.arg,
+	              done: context.done
+	            };
+	          } else if (record.type === "throw") {
+	            state = GenStateCompleted; // Dispatch the exception by looping back around to the
+	            // context.dispatchException(context.arg) call above.
 
-	      sum.add(atan2(k * sign * sin(absDelta), cosPhi0 * cosPhi1 + k * cos(absDelta)));
-	      angle += antimeridian ? delta + sign * tau : delta;
+	            context.method = "throw";
+	            context.arg = record.arg;
+	          }
+	        }
+	      };
+	    } // Call delegate.iterator[context.method](context.arg) and handle the
+	    // result, either by returning a { value, done } result from the
+	    // delegate iterator, or by modifying context.method and context.arg,
+	    // setting context.delegate to null, and returning the ContinueSentinel.
+
+
+	    function maybeInvokeDelegate(delegate, context) {
+	      var method = delegate.iterator[context.method];
+
+	      if (method === undefined$1) {
+	        // A .throw or .return when the delegate iterator has no .throw
+	        // method always terminates the yield* loop.
+	        context.delegate = null;
+
+	        if (context.method === "throw") {
+	          // Note: ["return"] must be used for ES3 parsing compatibility.
+	          if (delegate.iterator["return"]) {
+	            // If the delegate iterator has a return method, give it a
+	            // chance to clean up.
+	            context.method = "return";
+	            context.arg = undefined$1;
+	            maybeInvokeDelegate(delegate, context);
+
+	            if (context.method === "throw") {
+	              // If maybeInvokeDelegate(context) changed context.method from
+	              // "return" to "throw", let that override the TypeError below.
+	              return ContinueSentinel;
+	            }
+	          }
 
-	      // Are the longitudes either side of the point’s meridian (lambda),
-	      // and are the latitudes smaller than the parallel (phi)?
-	      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
-	        var arc = cartesianCross(cartesian(point0), cartesian(point1));
-	        cartesianNormalizeInPlace(arc);
-	        var intersection = cartesianCross(normal, arc);
-	        cartesianNormalizeInPlace(intersection);
-	        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
-	        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
-	          winding += antimeridian ^ delta >= 0 ? 1 : -1;
+	          context.method = "throw";
+	          context.arg = new TypeError("The iterator does not provide a 'throw' method");
 	        }
+
+	        return ContinueSentinel;
 	      }
-	    }
-	  }
 
-	  // First, determine whether the South pole is inside or outside:
-	  //
-	  // It is inside if:
-	  // * the polygon winds around it in a clockwise direction.
-	  // * the polygon does not (cumulatively) wind around it, but has a negative
-	  //   (counter-clockwise) area.
-	  //
-	  // Second, count the (signed) number of times a segment crosses a lambda
-	  // from the point to the South pole.  If it is zero, then the point is the
-	  // same side as the South pole.
+	      var record = tryCatch(method, delegate.iterator, context.arg);
 
-	  return (angle < -epsilon || angle < epsilon && sum < -epsilon) ^ (winding & 1);
-	}
+	      if (record.type === "throw") {
+	        context.method = "throw";
+	        context.arg = record.arg;
+	        context.delegate = null;
+	        return ContinueSentinel;
+	      }
 
-	function d3_ascending(a, b) {
-	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
-	}
+	      var info = record.arg;
 
-	function d3_bisector(compare) {
-	  if (compare.length === 1) { compare = ascendingComparator(compare); }
-	  return {
-	    left: function(a, x, lo, hi) {
-	      if (lo == null) { lo = 0; }
-	      if (hi == null) { hi = a.length; }
-	      while (lo < hi) {
-	        var mid = lo + hi >>> 1;
-	        if (compare(a[mid], x) < 0) { lo = mid + 1; }
-	        else { hi = mid; }
-	      }
-	      return lo;
-	    },
-	    right: function(a, x, lo, hi) {
-	      if (lo == null) { lo = 0; }
-	      if (hi == null) { hi = a.length; }
-	      while (lo < hi) {
-	        var mid = lo + hi >>> 1;
-	        if (compare(a[mid], x) > 0) { hi = mid; }
-	        else { lo = mid + 1; }
+	      if (!info) {
+	        context.method = "throw";
+	        context.arg = new TypeError("iterator result is not an object");
+	        context.delegate = null;
+	        return ContinueSentinel;
 	      }
-	      return lo;
-	    }
-	  };
-	}
 
-	function ascendingComparator(f) {
-	  return function(d, x) {
-	    return d3_ascending(f(d), x);
-	  };
-	}
+	      if (info.done) {
+	        // Assign the result of the finished delegate to the temporary
+	        // variable specified by delegate.resultName (see delegateYield).
+	        context[delegate.resultName] = info.value; // Resume execution at the desired location (see delegateYield).
 
-	var ascendingBisect = d3_bisector(d3_ascending);
-	var bisectRight = ascendingBisect.right;
+	        context.next = delegate.nextLoc; // If context.method was "throw" but the delegate handled the
+	        // exception, let the outer generator proceed normally. If
+	        // context.method was "next", forget context.arg since it has been
+	        // "consumed" by the delegate iterator. If context.method was
+	        // "return", allow the original .return call to continue in the
+	        // outer generator.
 
-	function d3_descending(a, b) {
-	  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
-	}
+	        if (context.method !== "return") {
+	          context.method = "next";
+	          context.arg = undefined$1;
+	        }
+	      } else {
+	        // Re-yield the result returned by the delegate method.
+	        return info;
+	      } // The delegate iterator is finished, so forget it and continue with
+	      // the outer generator.
 
-	function number(x) {
-	  return x === null ? NaN : +x;
-	}
 
-	function range$1(start, stop, step) {
-	  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
+	      context.delegate = null;
+	      return ContinueSentinel;
+	    } // Define Generator.prototype.{next,throw,return} in terms of the
+	    // unified ._invoke helper method.
 
-	  var i = -1,
-	      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
-	      range = new Array(n);
 
-	  while (++i < n) {
-	    range[i] = start + i * step;
-	  }
+	    defineIteratorMethods(Gp);
+	    define(Gp, toStringTagSymbol, "Generator"); // A Generator should always return itself as the iterator object when the
+	    // @@iterator function is called on it. Some browsers' implementations of the
+	    // iterator prototype chain incorrectly implement this, causing the Generator
+	    // object to not be returned from this call. This ensures that doesn't happen.
+	    // See https://github.com/facebook/regenerator/issues/274 for more details.
 
-	  return range;
-	}
+	    Gp[iteratorSymbol] = function () {
+	      return this;
+	    };
 
-	var e10 = Math.sqrt(50),
-	    e5 = Math.sqrt(10),
-	    e2 = Math.sqrt(2);
+	    Gp.toString = function () {
+	      return "[object Generator]";
+	    };
 
-	function ticks(start, stop, count) {
-	  var reverse,
-	      i = -1,
-	      n,
-	      ticks,
-	      step;
+	    function pushTryEntry(locs) {
+	      var entry = {
+	        tryLoc: locs[0]
+	      };
 
-	  stop = +stop, start = +start, count = +count;
-	  if (start === stop && count > 0) { return [start]; }
-	  if (reverse = stop < start) { n = start, start = stop, stop = n; }
-	  if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) { return []; }
+	      if (1 in locs) {
+	        entry.catchLoc = locs[1];
+	      }
 
-	  if (step > 0) {
-	    start = Math.ceil(start / step);
-	    stop = Math.floor(stop / step);
-	    ticks = new Array(n = Math.ceil(stop - start + 1));
-	    while (++i < n) { ticks[i] = (start + i) * step; }
-	  } else {
-	    start = Math.floor(start * step);
-	    stop = Math.ceil(stop * step);
-	    ticks = new Array(n = Math.ceil(start - stop + 1));
-	    while (++i < n) { ticks[i] = (start - i) / step; }
-	  }
+	      if (2 in locs) {
+	        entry.finallyLoc = locs[2];
+	        entry.afterLoc = locs[3];
+	      }
 
-	  if (reverse) { ticks.reverse(); }
+	      this.tryEntries.push(entry);
+	    }
 
-	  return ticks;
-	}
+	    function resetTryEntry(entry) {
+	      var record = entry.completion || {};
+	      record.type = "normal";
+	      delete record.arg;
+	      entry.completion = record;
+	    }
 
-	function tickIncrement(start, stop, count) {
-	  var step = (stop - start) / Math.max(0, count),
-	      power = Math.floor(Math.log(step) / Math.LN10),
-	      error = step / Math.pow(10, power);
-	  return power >= 0
-	      ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power)
-	      : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
-	}
+	    function Context(tryLocsList) {
+	      // The root entry object (effectively a try statement without a catch
+	      // or a finally block) gives us a place to store values thrown from
+	      // locations where there is no enclosing try statement.
+	      this.tryEntries = [{
+	        tryLoc: "root"
+	      }];
+	      tryLocsList.forEach(pushTryEntry, this);
+	      this.reset(true);
+	    }
 
-	function tickStep(start, stop, count) {
-	  var step0 = Math.abs(stop - start) / Math.max(0, count),
-	      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
-	      error = step0 / step1;
-	  if (error >= e10) { step1 *= 10; }
-	  else if (error >= e5) { step1 *= 5; }
-	  else if (error >= e2) { step1 *= 2; }
-	  return stop < start ? -step1 : step1;
-	}
+	    exports.keys = function (object) {
+	      var keys = [];
 
-	function threshold(values, p, valueof) {
-	  if (valueof == null) { valueof = number; }
-	  if (!(n = values.length)) { return; }
-	  if ((p = +p) <= 0 || n < 2) { return +valueof(values[0], 0, values); }
-	  if (p >= 1) { return +valueof(values[n - 1], n - 1, values); }
-	  var n,
-	      i = (n - 1) * p,
-	      i0 = Math.floor(i),
-	      value0 = +valueof(values[i0], i0, values),
-	      value1 = +valueof(values[i0 + 1], i0 + 1, values);
-	  return value0 + (value1 - value0) * (i - i0);
-	}
+	      for (var key in object) {
+	        keys.push(key);
+	      }
 
-	function d3_median(values, valueof) {
-	  var n = values.length,
-	      i = -1,
-	      value,
-	      numbers = [];
+	      keys.reverse(); // Rather than returning an object with a next method, we keep
+	      // things simple and return the next function itself.
 
-	  if (valueof == null) {
-	    while (++i < n) {
-	      if (!isNaN(value = number(values[i]))) {
-	        numbers.push(value);
-	      }
-	    }
-	  }
+	      return function next() {
+	        while (keys.length) {
+	          var key = keys.pop();
 
-	  else {
-	    while (++i < n) {
-	      if (!isNaN(value = number(valueof(values[i], i, values)))) {
-	        numbers.push(value);
-	      }
-	    }
-	  }
+	          if (key in object) {
+	            next.value = key;
+	            next.done = false;
+	            return next;
+	          }
+	        } // To avoid creating an additional object, we just hang the .value
+	        // and .done properties off the next function object itself. This
+	        // also ensures that the minifier will not anonymize the function.
 
-	  return threshold(numbers.sort(d3_ascending), 0.5);
-	}
 
-	function merge(arrays) {
-	  var n = arrays.length,
-	      m,
-	      i = -1,
-	      j = 0,
-	      merged,
-	      array;
+	        next.done = true;
+	        return next;
+	      };
+	    };
 
-	  while (++i < n) { j += arrays[i].length; }
-	  merged = new Array(j);
+	    function values(iterable) {
+	      if (iterable) {
+	        var iteratorMethod = iterable[iteratorSymbol];
 
-	  while (--n >= 0) {
-	    array = arrays[n];
-	    m = array.length;
-	    while (--m >= 0) {
-	      merged[--j] = array[m];
-	    }
-	  }
+	        if (iteratorMethod) {
+	          return iteratorMethod.call(iterable);
+	        }
 
-	  return merged;
-	}
+	        if (typeof iterable.next === "function") {
+	          return iterable;
+	        }
 
-	function clip(pointVisible, clipLine, interpolate, start) {
-	  return function(sink) {
-	    var line = clipLine(sink),
-	        ringBuffer = clipBuffer(),
-	        ringSink = clipLine(ringBuffer),
-	        polygonStarted = false,
-	        polygon,
-	        segments,
-	        ring;
+	        if (!isNaN(iterable.length)) {
+	          var i = -1,
+	              next = function next() {
+	            while (++i < iterable.length) {
+	              if (hasOwn.call(iterable, i)) {
+	                next.value = iterable[i];
+	                next.done = false;
+	                return next;
+	              }
+	            }
 
-	    var clip = {
-	      point: point,
-	      lineStart: lineStart,
-	      lineEnd: lineEnd,
-	      polygonStart: function() {
-	        clip.point = pointRing;
-	        clip.lineStart = ringStart;
-	        clip.lineEnd = ringEnd;
-	        segments = [];
-	        polygon = [];
-	      },
-	      polygonEnd: function() {
-	        clip.point = point;
-	        clip.lineStart = lineStart;
-	        clip.lineEnd = lineEnd;
-	        segments = merge(segments);
-	        var startInside = polygonContains(polygon, start);
-	        if (segments.length) {
-	          if (!polygonStarted) { sink.polygonStart(), polygonStarted = true; }
-	          clipRejoin(segments, compareIntersection, startInside, interpolate, sink);
-	        } else if (startInside) {
-	          if (!polygonStarted) { sink.polygonStart(), polygonStarted = true; }
-	          sink.lineStart();
-	          interpolate(null, null, 1, sink);
-	          sink.lineEnd();
+	            next.value = undefined$1;
+	            next.done = true;
+	            return next;
+	          };
+
+	          return next.next = next;
 	        }
-	        if (polygonStarted) { sink.polygonEnd(), polygonStarted = false; }
-	        segments = polygon = null;
-	      },
-	      sphere: function() {
-	        sink.polygonStart();
-	        sink.lineStart();
-	        interpolate(null, null, 1, sink);
-	        sink.lineEnd();
-	        sink.polygonEnd();
-	      }
-	    };
+	      } // Return an iterator with no values.
 
-	    function point(lambda, phi) {
-	      if (pointVisible(lambda, phi)) { sink.point(lambda, phi); }
-	    }
 
-	    function pointLine(lambda, phi) {
-	      line.point(lambda, phi);
+	      return {
+	        next: doneResult
+	      };
 	    }
 
-	    function lineStart() {
-	      clip.point = pointLine;
-	      line.lineStart();
-	    }
+	    exports.values = values;
 
-	    function lineEnd() {
-	      clip.point = point;
-	      line.lineEnd();
-	    }
-
-	    function pointRing(lambda, phi) {
-	      ring.push([lambda, phi]);
-	      ringSink.point(lambda, phi);
-	    }
-
-	    function ringStart() {
-	      ringSink.lineStart();
-	      ring = [];
+	    function doneResult() {
+	      return {
+	        value: undefined$1,
+	        done: true
+	      };
 	    }
 
-	    function ringEnd() {
-	      pointRing(ring[0][0], ring[0][1]);
-	      ringSink.lineEnd();
-
-	      var clean = ringSink.clean(),
-	          ringSegments = ringBuffer.result(),
-	          i, n = ringSegments.length, m,
-	          segment,
-	          point;
+	    Context.prototype = {
+	      constructor: Context,
+	      reset: function reset(skipTempReset) {
+	        this.prev = 0;
+	        this.next = 0; // Resetting context._sent for legacy support of Babel's
+	        // function.sent implementation.
 
-	      ring.pop();
-	      polygon.push(ring);
-	      ring = null;
+	        this.sent = this._sent = undefined$1;
+	        this.done = false;
+	        this.delegate = null;
+	        this.method = "next";
+	        this.arg = undefined$1;
+	        this.tryEntries.forEach(resetTryEntry);
 
-	      if (!n) { return; }
+	        if (!skipTempReset) {
+	          for (var name in this) {
+	            // Not sure about the optimal order of these conditions:
+	            if (name.charAt(0) === "t" && hasOwn.call(this, name) && !isNaN(+name.slice(1))) {
+	              this[name] = undefined$1;
+	            }
+	          }
+	        }
+	      },
+	      stop: function stop() {
+	        this.done = true;
+	        var rootEntry = this.tryEntries[0];
+	        var rootRecord = rootEntry.completion;
 
-	      // No intersections.
-	      if (clean & 1) {
-	        segment = ringSegments[0];
-	        if ((m = segment.length - 1) > 0) {
-	          if (!polygonStarted) { sink.polygonStart(), polygonStarted = true; }
-	          sink.lineStart();
-	          for (i = 0; i < m; ++i) { sink.point((point = segment[i])[0], point[1]); }
-	          sink.lineEnd();
+	        if (rootRecord.type === "throw") {
+	          throw rootRecord.arg;
 	        }
-	        return;
-	      }
 
-	      // Rejoin connected segments.
-	      // TODO reuse ringBuffer.rejoin()?
-	      if (n > 1 && clean & 2) { ringSegments.push(ringSegments.pop().concat(ringSegments.shift())); }
+	        return this.rval;
+	      },
+	      dispatchException: function dispatchException(exception) {
+	        if (this.done) {
+	          throw exception;
+	        }
 
-	      segments.push(ringSegments.filter(validSegment));
-	    }
+	        var context = this;
 
-	    return clip;
-	  };
-	}
+	        function handle(loc, caught) {
+	          record.type = "throw";
+	          record.arg = exception;
+	          context.next = loc;
 
-	function validSegment(segment) {
-	  return segment.length > 1;
-	}
+	          if (caught) {
+	            // If the dispatched exception was caught by a catch block,
+	            // then let that catch block handle the exception normally.
+	            context.method = "next";
+	            context.arg = undefined$1;
+	          }
 
-	// Intersections are sorted along the clip edge. For both antimeridian cutting
-	// and circle clipping, the same comparison is used.
-	function compareIntersection(a, b) {
-	  return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon : halfPi - a[1])
-	       - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon : halfPi - b[1]);
-	}
+	          return !!caught;
+	        }
 
-	var clipAntimeridian = clip(
-	  function() { return true; },
-	  clipAntimeridianLine,
-	  clipAntimeridianInterpolate,
-	  [-pi, -halfPi]
-	);
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
+	          var record = entry.completion;
 
-	// Takes a line and cuts into visible segments. Return values: 0 - there were
-	// intersections or the line was empty; 1 - no intersections; 2 - there were
-	// intersections, and the first and last segments should be rejoined.
-	function clipAntimeridianLine(stream) {
-	  var lambda0 = NaN,
-	      phi0 = NaN,
-	      sign0 = NaN,
-	      clean; // no intersections
+	          if (entry.tryLoc === "root") {
+	            // Exception thrown outside of any try block that could handle
+	            // it, so set the completion value of the entire function to
+	            // throw the exception.
+	            return handle("end");
+	          }
 
-	  return {
-	    lineStart: function() {
-	      stream.lineStart();
-	      clean = 1;
-	    },
-	    point: function(lambda1, phi1) {
-	      var sign1 = lambda1 > 0 ? pi : -pi,
-	          delta = abs$2(lambda1 - lambda0);
-	      if (abs$2(delta - pi) < epsilon) { // line crosses a pole
-	        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi : -halfPi);
-	        stream.point(sign0, phi0);
-	        stream.lineEnd();
-	        stream.lineStart();
-	        stream.point(sign1, phi0);
-	        stream.point(lambda1, phi0);
-	        clean = 0;
-	      } else if (sign0 !== sign1 && delta >= pi) { // line crosses antimeridian
-	        if (abs$2(lambda0 - sign0) < epsilon) { lambda0 -= sign0 * epsilon; } // handle degeneracies
-	        if (abs$2(lambda1 - sign1) < epsilon) { lambda1 -= sign1 * epsilon; }
-	        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
-	        stream.point(sign0, phi0);
-	        stream.lineEnd();
-	        stream.lineStart();
-	        stream.point(sign1, phi0);
-	        clean = 0;
-	      }
-	      stream.point(lambda0 = lambda1, phi0 = phi1);
-	      sign0 = sign1;
-	    },
-	    lineEnd: function() {
-	      stream.lineEnd();
-	      lambda0 = phi0 = NaN;
-	    },
-	    clean: function() {
-	      return 2 - clean; // if intersections, rejoin first and last segments
-	    }
-	  };
-	}
+	          if (entry.tryLoc <= this.prev) {
+	            var hasCatch = hasOwn.call(entry, "catchLoc");
+	            var hasFinally = hasOwn.call(entry, "finallyLoc");
 
-	function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
-	  var cosPhi0,
-	      cosPhi1,
-	      sinLambda0Lambda1 = sin(lambda0 - lambda1);
-	  return abs$2(sinLambda0Lambda1) > epsilon
-	      ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1)
-	          - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0))
-	          / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))
-	      : (phi0 + phi1) / 2;
-	}
+	            if (hasCatch && hasFinally) {
+	              if (this.prev < entry.catchLoc) {
+	                return handle(entry.catchLoc, true);
+	              } else if (this.prev < entry.finallyLoc) {
+	                return handle(entry.finallyLoc);
+	              }
+	            } else if (hasCatch) {
+	              if (this.prev < entry.catchLoc) {
+	                return handle(entry.catchLoc, true);
+	              }
+	            } else if (hasFinally) {
+	              if (this.prev < entry.finallyLoc) {
+	                return handle(entry.finallyLoc);
+	              }
+	            } else {
+	              throw new Error("try statement without catch or finally");
+	            }
+	          }
+	        }
+	      },
+	      abrupt: function abrupt(type, arg) {
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
 
-	function clipAntimeridianInterpolate(from, to, direction, stream) {
-	  var phi;
-	  if (from == null) {
-	    phi = direction * halfPi;
-	    stream.point(-pi, phi);
-	    stream.point(0, phi);
-	    stream.point(pi, phi);
-	    stream.point(pi, 0);
-	    stream.point(pi, -phi);
-	    stream.point(0, -phi);
-	    stream.point(-pi, -phi);
-	    stream.point(-pi, 0);
-	    stream.point(-pi, phi);
-	  } else if (abs$2(from[0] - to[0]) > epsilon) {
-	    var lambda = from[0] < to[0] ? pi : -pi;
-	    phi = direction * lambda / 2;
-	    stream.point(-lambda, phi);
-	    stream.point(0, phi);
-	    stream.point(lambda, phi);
-	  } else {
-	    stream.point(to[0], to[1]);
-	  }
-	}
+	          if (entry.tryLoc <= this.prev && hasOwn.call(entry, "finallyLoc") && this.prev < entry.finallyLoc) {
+	            var finallyEntry = entry;
+	            break;
+	          }
+	        }
 
-	function clipCircle(radius) {
-	  var cr = cos(radius),
-	      delta = 6 * radians,
-	      smallRadius = cr > 0,
-	      notHemisphere = abs$2(cr) > epsilon; // TODO optimise for this common case
+	        if (finallyEntry && (type === "break" || type === "continue") && finallyEntry.tryLoc <= arg && arg <= finallyEntry.finallyLoc) {
+	          // Ignore the finally entry if control is not jumping to a
+	          // location outside the try/catch block.
+	          finallyEntry = null;
+	        }
 
-	  function interpolate(from, to, direction, stream) {
-	    circleStream(stream, radius, delta, direction, from, to);
-	  }
+	        var record = finallyEntry ? finallyEntry.completion : {};
+	        record.type = type;
+	        record.arg = arg;
 
-	  function visible(lambda, phi) {
-	    return cos(lambda) * cos(phi) > cr;
-	  }
+	        if (finallyEntry) {
+	          this.method = "next";
+	          this.next = finallyEntry.finallyLoc;
+	          return ContinueSentinel;
+	        }
 
-	  // Takes a line and cuts into visible segments. Return values used for polygon
-	  // clipping: 0 - there were intersections or the line was empty; 1 - no
-	  // intersections 2 - there were intersections, and the first and last segments
-	  // should be rejoined.
-	  function clipLine(stream) {
-	    var point0, // previous point
-	        c0, // code for previous point
-	        v0, // visibility of previous point
-	        v00, // visibility of first point
-	        clean; // no intersections
-	    return {
-	      lineStart: function() {
-	        v00 = v0 = false;
-	        clean = 1;
+	        return this.complete(record);
 	      },
-	      point: function(lambda, phi) {
-	        var point1 = [lambda, phi],
-	            point2,
-	            v = visible(lambda, phi),
-	            c = smallRadius
-	              ? v ? 0 : code(lambda, phi)
-	              : v ? code(lambda + (lambda < 0 ? pi : -pi), phi) : 0;
-	        if (!point0 && (v00 = v0 = v)) { stream.lineStart(); }
-	        if (v !== v0) {
-	          point2 = intersect(point0, point1);
-	          if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2))
-	            { point1[2] = 1; }
+	      complete: function complete(record, afterLoc) {
+	        if (record.type === "throw") {
+	          throw record.arg;
 	        }
-	        if (v !== v0) {
-	          clean = 0;
-	          if (v) {
-	            // outside going in
-	            stream.lineStart();
-	            point2 = intersect(point1, point0);
-	            stream.point(point2[0], point2[1]);
-	          } else {
-	            // inside going out
-	            point2 = intersect(point0, point1);
-	            stream.point(point2[0], point2[1], 2);
-	            stream.lineEnd();
-	          }
-	          point0 = point2;
-	        } else if (notHemisphere && point0 && smallRadius ^ v) {
-	          var t;
-	          // If the codes for two points are different, or are both zero,
-	          // and there this segment intersects with the small circle.
-	          if (!(c & c0) && (t = intersect(point1, point0, true))) {
-	            clean = 0;
-	            if (smallRadius) {
-	              stream.lineStart();
-	              stream.point(t[0][0], t[0][1]);
-	              stream.point(t[1][0], t[1][1]);
-	              stream.lineEnd();
-	            } else {
-	              stream.point(t[1][0], t[1][1]);
-	              stream.lineEnd();
-	              stream.lineStart();
-	              stream.point(t[0][0], t[0][1], 3);
-	            }
-	          }
+
+	        if (record.type === "break" || record.type === "continue") {
+	          this.next = record.arg;
+	        } else if (record.type === "return") {
+	          this.rval = this.arg = record.arg;
+	          this.method = "return";
+	          this.next = "end";
+	        } else if (record.type === "normal" && afterLoc) {
+	          this.next = afterLoc;
 	        }
-	        if (v && (!point0 || !pointEqual(point0, point1))) {
-	          stream.point(point1[0], point1[1]);
+
+	        return ContinueSentinel;
+	      },
+	      finish: function finish(finallyLoc) {
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
+
+	          if (entry.finallyLoc === finallyLoc) {
+	            this.complete(entry.completion, entry.afterLoc);
+	            resetTryEntry(entry);
+	            return ContinueSentinel;
+	          }
 	        }
-	        point0 = point1, v0 = v, c0 = c;
 	      },
-	      lineEnd: function() {
-	        if (v0) { stream.lineEnd(); }
-	        point0 = null;
+	      "catch": function _catch(tryLoc) {
+	        for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+	          var entry = this.tryEntries[i];
+
+	          if (entry.tryLoc === tryLoc) {
+	            var record = entry.completion;
+
+	            if (record.type === "throw") {
+	              var thrown = record.arg;
+	              resetTryEntry(entry);
+	            }
+
+	            return thrown;
+	          }
+	        } // The context.catch method must only be called with a location
+	        // argument that corresponds to a known catch block.
+
+
+	        throw new Error("illegal catch attempt");
 	      },
-	      // Rejoin first and last segments if there were intersections and the first
-	      // and last points were visible.
-	      clean: function() {
-	        return clean | ((v00 && v0) << 1);
+	      delegateYield: function delegateYield(iterable, resultName, nextLoc) {
+	        this.delegate = {
+	          iterator: values(iterable),
+	          resultName: resultName,
+	          nextLoc: nextLoc
+	        };
+
+	        if (this.method === "next") {
+	          // Deliberately forget the last sent value so that we don't
+	          // accidentally pass it on to the delegate.
+	          this.arg = undefined$1;
+	        }
+
+	        return ContinueSentinel;
 	      }
-	    };
+	    }; // Regardless of whether this script is executing as a CommonJS module
+	    // or not, return the runtime object so that we can declare the variable
+	    // regeneratorRuntime in the outer scope, which allows this module to be
+	    // injected easily by `bin/regenerator --include-runtime script.js`.
+
+	    return exports;
+	  }( // If this script is executing as a CommonJS module, use module.exports
+	  // as the regeneratorRuntime namespace. Otherwise create a new empty
+	  // object. Either way, the resulting object will be used to initialize
+	  // the regeneratorRuntime variable at the top of this file.
+	   module.exports );
+
+	  try {
+	    regeneratorRuntime = runtime;
+	  } catch (accidentalStrictMode) {
+	    // This module should not be running in strict mode, so the above
+	    // assignment should always work unless something is misconfigured. Just
+	    // in case runtime.js accidentally runs in strict mode, we can escape
+	    // strict mode using a global Function call. This could conceivably fail
+	    // if a Content Security Policy forbids using Function, but in that case
+	    // the proper solution is to fix the accidental strict mode problem. If
+	    // you've misconfigured your bundler to force strict mode and applied a
+	    // CSP to forbid Function, and you're not willing to fix either of those
+	    // problems, please detail your unique predicament in a GitHub issue.
+	    Function("r", "regeneratorRuntime = r")(runtime);
 	  }
+	});
 
-	  // Intersects the great circle between a and b with the clip circle.
-	  function intersect(a, b, two) {
-	    var pa = cartesian(a),
-	        pb = cartesian(b);
+	var _marked = /*#__PURE__*/regeneratorRuntime.mark(numbers);
 
-	    // We have two planes, n1.p = d1 and n2.p = d2.
-	    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
-	    var n1 = [1, 0, 0], // normal
-	        n2 = cartesianCross(pa, pb),
-	        n2n2 = cartesianDot(n2, n2),
-	        n1n2 = n2[0], // cartesianDot(n1, n2),
-	        determinant = n2n2 - n1n2 * n1n2;
+	function number (x) {
+	  return x === null ? NaN : +x;
+	}
+	function numbers(values, valueof) {
+	  var _iterator, _step, value, index, _iterator2, _step2, _value;
 
-	    // Two polar points.
-	    if (!determinant) { return !two && a; }
+	  return regeneratorRuntime.wrap(function numbers$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          if (!(valueof === undefined)) {
+	            _context.next = 21;
+	            break;
+	          }
 
-	    var c1 =  cr * n2n2 / determinant,
-	        c2 = -cr * n1n2 / determinant,
-	        n1xn2 = cartesianCross(n1, n2),
-	        A = cartesianScale(n1, c1),
-	        B = cartesianScale(n2, c2);
-	    cartesianAddInPlace(A, B);
+	          _iterator = _createForOfIteratorHelper(values);
+	          _context.prev = 2;
 
-	    // Solve |p(t)|^2 = 1.
-	    var u = n1xn2,
-	        w = cartesianDot(A, u),
-	        uu = cartesianDot(u, u),
-	        t2 = w * w - uu * (cartesianDot(A, A) - 1);
+	          _iterator.s();
 
-	    if (t2 < 0) { return; }
+	        case 4:
+	          if ((_step = _iterator.n()).done) {
+	            _context.next = 11;
+	            break;
+	          }
 
-	    var t = sqrt(t2),
-	        q = cartesianScale(u, (-w - t) / uu);
-	    cartesianAddInPlace(q, A);
-	    q = spherical(q);
+	          value = _step.value;
 
-	    if (!two) { return q; }
+	          if (!(value != null && (value = +value) >= value)) {
+	            _context.next = 9;
+	            break;
+	          }
 
-	    // Two intersection points.
-	    var lambda0 = a[0],
-	        lambda1 = b[0],
-	        phi0 = a[1],
-	        phi1 = b[1],
-	        z;
+	          _context.next = 9;
+	          return value;
 
-	    if (lambda1 < lambda0) { z = lambda0, lambda0 = lambda1, lambda1 = z; }
+	        case 9:
+	          _context.next = 4;
+	          break;
 
-	    var delta = lambda1 - lambda0,
-	        polar = abs$2(delta - pi) < epsilon,
-	        meridian = polar || delta < epsilon;
+	        case 11:
+	          _context.next = 16;
+	          break;
 
-	    if (!polar && phi1 < phi0) { z = phi0, phi0 = phi1, phi1 = z; }
+	        case 13:
+	          _context.prev = 13;
+	          _context.t0 = _context["catch"](2);
 
-	    // Check that the first point is between a and b.
-	    if (meridian
-	        ? polar
-	          ? phi0 + phi1 > 0 ^ q[1] < (abs$2(q[0] - lambda0) < epsilon ? phi0 : phi1)
-	          : phi0 <= q[1] && q[1] <= phi1
-	        : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
-	      var q1 = cartesianScale(u, (-w + t) / uu);
-	      cartesianAddInPlace(q1, A);
-	      return [q, spherical(q1)];
-	    }
-	  }
+	          _iterator.e(_context.t0);
 
-	  // Generates a 4-bit vector representing the location of a point relative to
-	  // the small circle's bounding box.
-	  function code(lambda, phi) {
-	    var r = smallRadius ? radius : pi - radius,
-	        code = 0;
-	    if (lambda < -r) { code |= 1; } // left
-	    else if (lambda > r) { code |= 2; } // right
-	    if (phi < -r) { code |= 4; } // below
-	    else if (phi > r) { code |= 8; } // above
-	    return code;
-	  }
+	        case 16:
+	          _context.prev = 16;
 
-	  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi, radius - pi]);
-	}
+	          _iterator.f();
 
-	function clipLine(a, b, x0, y0, x1, y1) {
-	  var ax = a[0],
-	      ay = a[1],
-	      bx = b[0],
-	      by = b[1],
-	      t0 = 0,
-	      t1 = 1,
-	      dx = bx - ax,
-	      dy = by - ay,
-	      r;
+	          return _context.finish(16);
 
-	  r = x0 - ax;
-	  if (!dx && r > 0) { return; }
-	  r /= dx;
-	  if (dx < 0) {
-	    if (r < t0) { return; }
-	    if (r < t1) { t1 = r; }
-	  } else if (dx > 0) {
-	    if (r > t1) { return; }
-	    if (r > t0) { t0 = r; }
-	  }
+	        case 19:
+	          _context.next = 40;
+	          break;
 
-	  r = x1 - ax;
-	  if (!dx && r < 0) { return; }
-	  r /= dx;
-	  if (dx < 0) {
-	    if (r > t1) { return; }
-	    if (r > t0) { t0 = r; }
-	  } else if (dx > 0) {
-	    if (r < t0) { return; }
-	    if (r < t1) { t1 = r; }
-	  }
+	        case 21:
+	          index = -1;
+	          _iterator2 = _createForOfIteratorHelper(values);
+	          _context.prev = 23;
 
-	  r = y0 - ay;
-	  if (!dy && r > 0) { return; }
-	  r /= dy;
-	  if (dy < 0) {
-	    if (r < t0) { return; }
-	    if (r < t1) { t1 = r; }
-	  } else if (dy > 0) {
-	    if (r > t1) { return; }
-	    if (r > t0) { t0 = r; }
-	  }
+	          _iterator2.s();
 
-	  r = y1 - ay;
-	  if (!dy && r < 0) { return; }
-	  r /= dy;
-	  if (dy < 0) {
-	    if (r > t1) { return; }
-	    if (r > t0) { t0 = r; }
-	  } else if (dy > 0) {
-	    if (r < t0) { return; }
-	    if (r < t1) { t1 = r; }
-	  }
+	        case 25:
+	          if ((_step2 = _iterator2.n()).done) {
+	            _context.next = 32;
+	            break;
+	          }
 
-	  if (t0 > 0) { a[0] = ax + t0 * dx, a[1] = ay + t0 * dy; }
-	  if (t1 < 1) { b[0] = ax + t1 * dx, b[1] = ay + t1 * dy; }
-	  return true;
-	}
+	          _value = _step2.value;
 
-	var clipMax = 1e9, clipMin = -clipMax;
+	          if (!((_value = valueof(_value, ++index, values)) != null && (_value = +_value) >= _value)) {
+	            _context.next = 30;
+	            break;
+	          }
 
-	// TODO Use d3-polygon’s polygonContains here for the ring check?
-	// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?
+	          _context.next = 30;
+	          return _value;
 
-	function clipRectangle(x0, y0, x1, y1) {
+	        case 30:
+	          _context.next = 25;
+	          break;
 
-	  function visible(x, y) {
-	    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
-	  }
+	        case 32:
+	          _context.next = 37;
+	          break;
 
-	  function interpolate(from, to, direction, stream) {
-	    var a = 0, a1 = 0;
-	    if (from == null
-	        || (a = corner(from, direction)) !== (a1 = corner(to, direction))
-	        || comparePoint(from, to) < 0 ^ direction > 0) {
-	      do { stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0); }
-	      while ((a = (a + direction + 4) % 4) !== a1);
-	    } else {
-	      stream.point(to[0], to[1]);
+	        case 34:
+	          _context.prev = 34;
+	          _context.t1 = _context["catch"](23);
+
+	          _iterator2.e(_context.t1);
+
+	        case 37:
+	          _context.prev = 37;
+
+	          _iterator2.f();
+
+	          return _context.finish(37);
+
+	        case 40:
+	        case "end":
+	          return _context.stop();
+	      }
 	    }
-	  }
+	  }, _marked, null, [[2, 13, 16, 19], [23, 34, 37, 40]]);
+	}
 
-	  function corner(p, direction) {
-	    return abs$2(p[0] - x0) < epsilon ? direction > 0 ? 0 : 3
-	        : abs$2(p[0] - x1) < epsilon ? direction > 0 ? 2 : 1
-	        : abs$2(p[1] - y0) < epsilon ? direction > 0 ? 1 : 0
-	        : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
-	  }
+	var ascendingBisect = d3_bisector(d3_ascending);
+	var bisectRight = ascendingBisect.right;
+	var bisectCenter = d3_bisector(number).center;
 
-	  function compareIntersection(a, b) {
-	    return comparePoint(a.x, b.x);
-	  }
+	// `Array.prototype.fill` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.fill
+	_export({ target: 'Array', proto: true }, {
+	  fill: arrayFill
+	});
 
-	  function comparePoint(a, b) {
-	    var ca = corner(a, 1),
-	        cb = corner(b, 1);
-	    return ca !== cb ? ca - cb
-	        : ca === 0 ? b[1] - a[1]
-	        : ca === 1 ? a[0] - b[0]
-	        : ca === 2 ? a[1] - b[1]
-	        : b[0] - a[0];
+	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables('fill');
+
+	var INCORRECT_ITERATION$1 = !checkCorrectnessOfIteration(function (iterable) {
+	  Array.from(iterable);
+	});
+
+	// `Array.from` method
+	// https://tc39.github.io/ecma262/#sec-array.from
+	_export({ target: 'Array', stat: true, forced: INCORRECT_ITERATION$1 }, {
+	  from: arrayFrom
+	});
+
+	var $some$1 = arrayIteration.some;
+
+
+
+	var STRICT_METHOD$4 = arrayMethodIsStrict('some');
+	var USES_TO_LENGTH$7 = arrayMethodUsesToLength('some');
+
+	// `Array.prototype.some` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.some
+	_export({ target: 'Array', proto: true, forced: !STRICT_METHOD$4 || !USES_TO_LENGTH$7 }, {
+	  some: function some(callbackfn /* , thisArg */) {
+	    return $some$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
 	  }
+	});
 
-	  return function(stream) {
-	    var activeStream = stream,
-	        bufferStream = clipBuffer(),
-	        segments,
-	        polygon,
-	        ring,
-	        x__, y__, v__, // first point
-	        x_, y_, v_, // previous point
-	        first,
-	        clean;
+	// `Float64Array` constructor
+	// https://tc39.github.io/ecma262/#sec-typedarray-objects
+	typedArrayConstructor('Float64', function (init) {
+	  return function Float64Array(data, byteOffset, length) {
+	    return init(this, data, byteOffset, length);
+	  };
+	});
 
-	    var clipStream = {
-	      point: point,
-	      lineStart: lineStart,
-	      lineEnd: lineEnd,
-	      polygonStart: polygonStart,
-	      polygonEnd: polygonEnd
-	    };
+	var exportTypedArrayStaticMethod$1 = arrayBufferViewCore.exportTypedArrayStaticMethod;
 
-	    function point(x, y) {
-	      if (visible(x, y)) { activeStream.point(x, y); }
-	    }
 
-	    function polygonInside() {
-	      var winding = 0;
+	// `%TypedArray%.from` method
+	// https://tc39.github.io/ecma262/#sec-%typedarray%.from
+	exportTypedArrayStaticMethod$1('from', typedArrayFrom, typedArrayConstructorsRequireWrappers);
 
-	      for (var i = 0, n = polygon.length; i < n; ++i) {
-	        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
-	          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
-	          if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) { ++winding; } }
-	          else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) { --winding; } }
+	function d3_descending (a, b) {
+	  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
+	}
+
+	// https://github.com/python/cpython/blob/a74eea238f5baba15797e2e8b570d153bc8690a7/Modules/mathmodule.c#L1423
+	var Adder = /*#__PURE__*/function () {
+	  function Adder() {
+	    _classCallCheck(this, Adder);
+
+	    this._partials = new Float64Array(32);
+	    this._n = 0;
+	  }
+
+	  _createClass(Adder, [{
+	    key: "add",
+	    value: function add(x) {
+	      var p = this._partials;
+	      var i = 0;
+
+	      for (var j = 0; j < this._n && j < 32; j++) {
+	        var y = p[j],
+	            hi = x + y,
+	            lo = Math.abs(x) < Math.abs(y) ? x - (hi - y) : y - (hi - x);
+	        if (lo) p[i++] = lo;
+	        x = hi;
+	      }
+
+	      p[i] = x;
+	      this._n = i + 1;
+	      return this;
+	    }
+	  }, {
+	    key: "valueOf",
+	    value: function valueOf() {
+	      var p = this._partials;
+	      var n = this._n,
+	          x,
+	          y,
+	          lo,
+	          hi = 0;
+
+	      if (n > 0) {
+	        hi = p[--n];
+
+	        while (n > 0) {
+	          x = hi;
+	          y = p[--n];
+	          hi = x + y;
+	          lo = y - (hi - x);
+	          if (lo) break;
+	        }
+
+	        if (n > 0 && (lo < 0 && p[n - 1] < 0 || lo > 0 && p[n - 1] > 0)) {
+	          y = lo * 2;
+	          x = hi + y;
+	          if (y == x - hi) hi = x;
 	        }
 	      }
 
-	      return winding;
+	      return hi;
 	    }
+	  }]);
 
-	    // Buffer geometry within a polygon and then clip it en masse.
-	    function polygonStart() {
-	      activeStream = bufferStream, segments = [], polygon = [], clean = true;
+	  return Adder;
+	}();
+
+	// `Map` constructor
+	// https://tc39.github.io/ecma262/#sec-map-objects
+	var es_map = collection('Map', function (init) {
+	  return function Map() { return init(this, arguments.length ? arguments[0] : undefined); };
+	}, collectionStrong);
+
+	var e10 = Math.sqrt(50),
+	    e5 = Math.sqrt(10),
+	    e2 = Math.sqrt(2);
+	function ticks (start, stop, count) {
+	  var reverse,
+	      i = -1,
+	      n,
+	      ticks,
+	      step;
+	  stop = +stop, start = +start, count = +count;
+	  if (start === stop && count > 0) return [start];
+	  if (reverse = stop < start) n = start, start = stop, stop = n;
+	  if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];
+
+	  if (step > 0) {
+	    start = Math.ceil(start / step);
+	    stop = Math.floor(stop / step);
+	    ticks = new Array(n = Math.ceil(stop - start + 1));
+
+	    while (++i < n) {
+	      ticks[i] = (start + i) * step;
 	    }
+	  } else {
+	    step = -step;
+	    start = Math.ceil(start * step);
+	    stop = Math.floor(stop * step);
+	    ticks = new Array(n = Math.ceil(stop - start + 1));
 
-	    function polygonEnd() {
-	      var startInside = polygonInside(),
-	          cleanInside = clean && startInside,
-	          visible = (segments = merge(segments)).length;
-	      if (cleanInside || visible) {
-	        stream.polygonStart();
-	        if (cleanInside) {
-	          stream.lineStart();
-	          interpolate(null, null, 1, stream);
-	          stream.lineEnd();
-	        }
-	        if (visible) {
-	          clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
+	    while (++i < n) {
+	      ticks[i] = (start + i) / step;
+	    }
+	  }
+
+	  if (reverse) ticks.reverse();
+	  return ticks;
+	}
+	function tickIncrement(start, stop, count) {
+	  var step = (stop - start) / Math.max(0, count),
+	      power = Math.floor(Math.log(step) / Math.LN10),
+	      error = step / Math.pow(10, power);
+	  return power >= 0 ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power) : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
+	}
+	function tickStep(start, stop, count) {
+	  var step0 = Math.abs(stop - start) / Math.max(0, count),
+	      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
+	      error = step0 / step1;
+	  if (error >= e10) step1 *= 10;else if (error >= e5) step1 *= 5;else if (error >= e2) step1 *= 2;
+	  return stop < start ? -step1 : step1;
+	}
+
+	function max$4(values, valueof) {
+	  var max;
+
+	  if (valueof === undefined) {
+	    var _iterator = _createForOfIteratorHelper(values),
+	        _step;
+
+	    try {
+	      for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	        var value = _step.value;
+
+	        if (value != null && (max < value || max === undefined && value >= value)) {
+	          max = value;
 	        }
-	        stream.polygonEnd();
 	      }
-	      activeStream = stream, segments = polygon = ring = null;
+	    } catch (err) {
+	      _iterator.e(err);
+	    } finally {
+	      _iterator.f();
 	    }
+	  } else {
+	    var index = -1;
 
-	    function lineStart() {
-	      clipStream.point = linePoint;
-	      if (polygon) { polygon.push(ring = []); }
-	      first = true;
-	      v_ = false;
-	      x_ = y_ = NaN;
-	    }
+	    var _iterator2 = _createForOfIteratorHelper(values),
+	        _step2;
 
-	    // TODO rather than special-case polygons, simply handle them separately.
-	    // Ideally, coincident intersection points should be jittered to avoid
-	    // clipping issues.
-	    function lineEnd() {
-	      if (segments) {
-	        linePoint(x__, y__);
-	        if (v__ && v_) { bufferStream.rejoin(); }
-	        segments.push(bufferStream.result());
+	    try {
+	      for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+	        var _value = _step2.value;
+
+	        if ((_value = valueof(_value, ++index, values)) != null && (max < _value || max === undefined && _value >= _value)) {
+	          max = _value;
+	        }
 	      }
-	      clipStream.point = point;
-	      if (v_) { activeStream.lineEnd(); }
+	    } catch (err) {
+	      _iterator2.e(err);
+	    } finally {
+	      _iterator2.f();
 	    }
+	  }
 
-	    function linePoint(x, y) {
-	      var v = visible(x, y);
-	      if (polygon) { ring.push([x, y]); }
-	      if (first) {
-	        x__ = x, y__ = y, v__ = v;
-	        first = false;
-	        if (v) {
-	          activeStream.lineStart();
-	          activeStream.point(x, y);
+	  return max;
+	}
+
+	function min$7(values, valueof) {
+	  var min;
+
+	  if (valueof === undefined) {
+	    var _iterator = _createForOfIteratorHelper(values),
+	        _step;
+
+	    try {
+	      for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	        var value = _step.value;
+
+	        if (value != null && (min > value || min === undefined && value >= value)) {
+	          min = value;
 	        }
-	      } else {
-	        if (v && v_) { activeStream.point(x, y); }
-	        else {
-	          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
-	              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
-	          if (clipLine(a, b, x0, y0, x1, y1)) {
-	            if (!v_) {
-	              activeStream.lineStart();
-	              activeStream.point(a[0], a[1]);
-	            }
-	            activeStream.point(b[0], b[1]);
-	            if (!v) { activeStream.lineEnd(); }
-	            clean = false;
-	          } else if (v) {
-	            activeStream.lineStart();
-	            activeStream.point(x, y);
-	            clean = false;
-	          }
+	      }
+	    } catch (err) {
+	      _iterator.e(err);
+	    } finally {
+	      _iterator.f();
+	    }
+	  } else {
+	    var index = -1;
+
+	    var _iterator2 = _createForOfIteratorHelper(values),
+	        _step2;
+
+	    try {
+	      for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+	        var _value = _step2.value;
+
+	        if ((_value = valueof(_value, ++index, values)) != null && (min > _value || min === undefined && _value >= _value)) {
+	          min = _value;
 	        }
 	      }
-	      x_ = x, y_ = y, v_ = v;
+	    } catch (err) {
+	      _iterator2.e(err);
+	    } finally {
+	      _iterator2.f();
 	    }
+	  }
 
-	    return clipStream;
-	  };
+	  return min;
 	}
 
-	var lengthSum = adder(),
-	    lambda0$2,
-	    sinPhi0$1,
-	    cosPhi0$1;
+	// ISC license, Copyright 2018 Vladimir Agafonkin.
 
-	var lengthStream = {
-	  sphere: noop$2,
-	  point: noop$2,
-	  lineStart: lengthLineStart,
-	  lineEnd: noop$2,
-	  polygonStart: noop$2,
-	  polygonEnd: noop$2
-	};
+	function quickselect(array, k) {
+	  var left = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
+	  var right = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : array.length - 1;
+	  var compare = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : d3_ascending;
 
-	function lengthLineStart() {
-	  lengthStream.point = lengthPointFirst;
-	  lengthStream.lineEnd = lengthLineEnd;
+	  while (right > left) {
+	    if (right - left > 600) {
+	      var n = right - left + 1;
+	      var m = k - left + 1;
+	      var z = Math.log(n);
+	      var s = 0.5 * Math.exp(2 * z / 3);
+	      var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+	      var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+	      var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+	      quickselect(array, k, newLeft, newRight, compare);
+	    }
+
+	    var t = array[k];
+	    var i = left;
+	    var j = right;
+	    swap(array, left, k);
+	    if (compare(array[right], t) > 0) swap(array, left, right);
+
+	    while (i < j) {
+	      swap(array, i, j), ++i, --j;
+
+	      while (compare(array[i], t) < 0) {
+	        ++i;
+	      }
+
+	      while (compare(array[j], t) > 0) {
+	        --j;
+	      }
+	    }
+
+	    if (compare(array[left], t) === 0) swap(array, left, j);else ++j, swap(array, j, right);
+	    if (j <= k) left = j + 1;
+	    if (k <= j) right = j - 1;
+	  }
+
+	  return array;
 	}
 
-	function lengthLineEnd() {
-	  lengthStream.point = lengthStream.lineEnd = noop$2;
+	function swap(array, i, j) {
+	  var t = array[i];
+	  array[i] = array[j];
+	  array[j] = t;
 	}
 
-	function lengthPointFirst(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  lambda0$2 = lambda, sinPhi0$1 = sin(phi), cosPhi0$1 = cos(phi);
-	  lengthStream.point = lengthPoint;
+	function quantile(values, p, valueof) {
+	  values = Float64Array.from(numbers(values, valueof));
+	  if (!(n = values.length)) return;
+	  if ((p = +p) <= 0 || n < 2) return min$7(values);
+	  if (p >= 1) return max$4(values);
+	  var n,
+	      i = (n - 1) * p,
+	      i0 = Math.floor(i),
+	      value0 = max$4(quickselect(values, i0).subarray(0, i0 + 1)),
+	      value1 = min$7(values.subarray(i0 + 1));
+	  return value0 + (value1 - value0) * (i - i0);
 	}
 
-	function lengthPoint(lambda, phi) {
-	  lambda *= radians, phi *= radians;
-	  var sinPhi = sin(phi),
-	      cosPhi = cos(phi),
-	      delta = abs$2(lambda - lambda0$2),
-	      cosDelta = cos(delta),
-	      sinDelta = sin(delta),
-	      x = cosPhi * sinDelta,
-	      y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
-	      z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
-	  lengthSum.add(atan2(sqrt(x * x + y * y), z));
-	  lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
-	}
-
-	function d3_geoLength(object) {
-	  lengthSum.reset();
-	  d3_geoStream(object, lengthStream);
-	  return +lengthSum;
+	function d3_median (values, valueof) {
+	  return quantile(values, 0.5, valueof);
 	}
 
-	function identity(x) {
-	  return x;
-	}
+	var _marked$1 = /*#__PURE__*/regeneratorRuntime.mark(flatten);
 
-	var areaSum$1 = adder(),
-	    areaRingSum$1 = adder(),
-	    x00,
-	    y00,
-	    x0$1,
-	    y0$1;
+	function flatten(arrays) {
+	  var _iterator, _step, array;
 
-	var areaStream$1 = {
-	  point: noop$2,
-	  lineStart: noop$2,
-	  lineEnd: noop$2,
-	  polygonStart: function() {
-	    areaStream$1.lineStart = areaRingStart$1;
-	    areaStream$1.lineEnd = areaRingEnd$1;
-	  },
-	  polygonEnd: function() {
-	    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$2;
-	    areaSum$1.add(abs$2(areaRingSum$1));
-	    areaRingSum$1.reset();
-	  },
-	  result: function() {
-	    var area = areaSum$1 / 2;
-	    areaSum$1.reset();
-	    return area;
-	  }
-	};
+	  return regeneratorRuntime.wrap(function flatten$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          _iterator = _createForOfIteratorHelper(arrays);
+	          _context.prev = 1;
 
-	function areaRingStart$1() {
-	  areaStream$1.point = areaPointFirst$1;
-	}
+	          _iterator.s();
 
-	function areaPointFirst$1(x, y) {
-	  areaStream$1.point = areaPoint$1;
-	  x00 = x0$1 = x, y00 = y0$1 = y;
-	}
+	        case 3:
+	          if ((_step = _iterator.n()).done) {
+	            _context.next = 8;
+	            break;
+	          }
 
-	function areaPoint$1(x, y) {
-	  areaRingSum$1.add(y0$1 * x - x0$1 * y);
-	  x0$1 = x, y0$1 = y;
-	}
+	          array = _step.value;
+	          return _context.delegateYield(array, "t0", 6);
 
-	function areaRingEnd$1() {
-	  areaPoint$1(x00, y00);
-	}
+	        case 6:
+	          _context.next = 3;
+	          break;
 
-	var x0$2 = Infinity,
-	    y0$2 = x0$2,
-	    x1 = -x0$2,
-	    y1 = x1;
+	        case 8:
+	          _context.next = 13;
+	          break;
 
-	var boundsStream$1 = {
-	  point: boundsPoint$1,
-	  lineStart: noop$2,
-	  lineEnd: noop$2,
-	  polygonStart: noop$2,
-	  polygonEnd: noop$2,
-	  result: function() {
-	    var bounds = [[x0$2, y0$2], [x1, y1]];
-	    x1 = y1 = -(y0$2 = x0$2 = Infinity);
-	    return bounds;
-	  }
-	};
+	        case 10:
+	          _context.prev = 10;
+	          _context.t1 = _context["catch"](1);
 
-	function boundsPoint$1(x, y) {
-	  if (x < x0$2) { x0$2 = x; }
-	  if (x > x1) { x1 = x; }
-	  if (y < y0$2) { y0$2 = y; }
-	  if (y > y1) { y1 = y; }
-	}
+	          _iterator.e(_context.t1);
 
-	// TODO Enforce positive area for exterior, negative area for interior?
+	        case 13:
+	          _context.prev = 13;
 
-	var X0$1 = 0,
-	    Y0$1 = 0,
-	    Z0$1 = 0,
-	    X1$1 = 0,
-	    Y1$1 = 0,
-	    Z1$1 = 0,
-	    X2$1 = 0,
-	    Y2$1 = 0,
-	    Z2$1 = 0,
-	    x00$1,
-	    y00$1,
-	    x0$3,
-	    y0$3;
+	          _iterator.f();
 
-	var centroidStream$1 = {
-	  point: centroidPoint$1,
-	  lineStart: centroidLineStart$1,
-	  lineEnd: centroidLineEnd$1,
-	  polygonStart: function() {
-	    centroidStream$1.lineStart = centroidRingStart$1;
-	    centroidStream$1.lineEnd = centroidRingEnd$1;
-	  },
-	  polygonEnd: function() {
-	    centroidStream$1.point = centroidPoint$1;
-	    centroidStream$1.lineStart = centroidLineStart$1;
-	    centroidStream$1.lineEnd = centroidLineEnd$1;
-	  },
-	  result: function() {
-	    var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1]
-	        : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1]
-	        : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1]
-	        : [NaN, NaN];
-	    X0$1 = Y0$1 = Z0$1 =
-	    X1$1 = Y1$1 = Z1$1 =
-	    X2$1 = Y2$1 = Z2$1 = 0;
-	    return centroid;
-	  }
-	};
+	          return _context.finish(13);
 
-	function centroidPoint$1(x, y) {
-	  X0$1 += x;
-	  Y0$1 += y;
-	  ++Z0$1;
+	        case 16:
+	        case "end":
+	          return _context.stop();
+	      }
+	    }
+	  }, _marked$1, null, [[1, 10, 13, 16]]);
 	}
 
-	function centroidLineStart$1() {
-	  centroidStream$1.point = centroidPointFirstLine;
+	function merge(arrays) {
+	  return Array.from(flatten(arrays));
 	}
 
-	function centroidPointFirstLine(x, y) {
-	  centroidStream$1.point = centroidPointLine;
-	  centroidPoint$1(x0$3 = x, y0$3 = y);
-	}
+	function range (start, stop, step) {
+	  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
+	  var i = -1,
+	      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
+	      range = new Array(n);
 
-	function centroidPointLine(x, y) {
-	  var dx = x - x0$3, dy = y - y0$3, z = sqrt(dx * dx + dy * dy);
-	  X1$1 += z * (x0$3 + x) / 2;
-	  Y1$1 += z * (y0$3 + y) / 2;
-	  Z1$1 += z;
-	  centroidPoint$1(x0$3 = x, y0$3 = y);
-	}
+	  while (++i < n) {
+	    range[i] = start + i * step;
+	  }
 
-	function centroidLineEnd$1() {
-	  centroidStream$1.point = centroidPoint$1;
+	  return range;
 	}
 
-	function centroidRingStart$1() {
-	  centroidStream$1.point = centroidPointFirstRing;
-	}
+	var test$2 = [];
+	var nativeSort = test$2.sort;
 
-	function centroidRingEnd$1() {
-	  centroidPointRing(x00$1, y00$1);
-	}
+	// IE8-
+	var FAILS_ON_UNDEFINED = fails(function () {
+	  test$2.sort(undefined);
+	});
+	// V8 bug
+	var FAILS_ON_NULL = fails(function () {
+	  test$2.sort(null);
+	});
+	// Old WebKit
+	var STRICT_METHOD$5 = arrayMethodIsStrict('sort');
 
-	function centroidPointFirstRing(x, y) {
-	  centroidStream$1.point = centroidPointRing;
-	  centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
-	}
+	var FORCED$a = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD$5;
 
-	function centroidPointRing(x, y) {
-	  var dx = x - x0$3,
-	      dy = y - y0$3,
-	      z = sqrt(dx * dx + dy * dy);
+	// `Array.prototype.sort` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.sort
+	_export({ target: 'Array', proto: true, forced: FORCED$a }, {
+	  sort: function sort(comparefn) {
+	    return comparefn === undefined
+	      ? nativeSort.call(toObject(this))
+	      : nativeSort.call(toObject(this), aFunction$1(comparefn));
+	  }
+	});
 
-	  X1$1 += z * (x0$3 + x) / 2;
-	  Y1$1 += z * (y0$3 + y) / 2;
-	  Z1$1 += z;
+	// `SameValue` abstract operation
+	// https://tc39.github.io/ecma262/#sec-samevalue
+	var sameValue = Object.is || function is(x, y) {
+	  // eslint-disable-next-line no-self-compare
+	  return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;
+	};
 
-	  z = y0$3 * x - x0$3 * y;
-	  X2$1 += z * (x0$3 + x);
-	  Y2$1 += z * (y0$3 + y);
-	  Z2$1 += z * 3;
-	  centroidPoint$1(x0$3 = x, y0$3 = y);
-	}
+	var $hypot = Math.hypot;
+	var abs$1 = Math.abs;
+	var sqrt = Math.sqrt;
 
-	function PathContext(context) {
-	  this._context = context;
-	}
+	// Chrome 77 bug
+	// https://bugs.chromium.org/p/v8/issues/detail?id=9546
+	var BUGGY = !!$hypot && $hypot(Infinity, NaN) !== Infinity;
 
-	PathContext.prototype = {
-	  _radius: 4.5,
-	  pointRadius: function(_) {
-	    return this._radius = _, this;
-	  },
-	  polygonStart: function() {
-	    this._line = 0;
-	  },
-	  polygonEnd: function() {
-	    this._line = NaN;
-	  },
-	  lineStart: function() {
-	    this._point = 0;
-	  },
-	  lineEnd: function() {
-	    if (this._line === 0) { this._context.closePath(); }
-	    this._point = NaN;
-	  },
-	  point: function(x, y) {
-	    switch (this._point) {
-	      case 0: {
-	        this._context.moveTo(x, y);
-	        this._point = 1;
-	        break;
-	      }
-	      case 1: {
-	        this._context.lineTo(x, y);
-	        break;
-	      }
-	      default: {
-	        this._context.moveTo(x + this._radius, y);
-	        this._context.arc(x, y, this._radius, 0, tau);
-	        break;
-	      }
-	    }
-	  },
-	  result: noop$2
+	// `Math.hypot` method
+	// https://tc39.github.io/ecma262/#sec-math.hypot
+	_export({ target: 'Math', stat: true, forced: BUGGY }, {
+	  hypot: function hypot(value1, value2) { // eslint-disable-line no-unused-vars
+	    var sum = 0;
+	    var i = 0;
+	    var aLen = arguments.length;
+	    var larg = 0;
+	    var arg, div;
+	    while (i < aLen) {
+	      arg = abs$1(arguments[i++]);
+	      if (larg < arg) {
+	        div = larg / arg;
+	        sum = sum * div * div + 1;
+	        larg = arg;
+	      } else if (arg > 0) {
+	        div = arg / larg;
+	        sum += div * div;
+	      } else sum += arg;
+	    }
+	    return larg === Infinity ? Infinity : larg * sqrt(sum);
+	  }
+	});
+
+	// `Math.sign` method implementation
+	// https://tc39.github.io/ecma262/#sec-math.sign
+	var mathSign = Math.sign || function sign(x) {
+	  // eslint-disable-next-line no-self-compare
+	  return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;
 	};
 
-	var lengthSum$1 = adder(),
-	    lengthRing,
-	    x00$2,
-	    y00$2,
-	    x0$4,
-	    y0$4;
+	// `Math.sign` method
+	// https://tc39.github.io/ecma262/#sec-math.sign
+	_export({ target: 'Math', stat: true }, {
+	  sign: mathSign
+	});
 
-	var lengthStream$1 = {
-	  point: noop$2,
-	  lineStart: function() {
-	    lengthStream$1.point = lengthPointFirst$1;
-	  },
-	  lineEnd: function() {
-	    if (lengthRing) { lengthPoint$1(x00$2, y00$2); }
-	    lengthStream$1.point = noop$2;
-	  },
-	  polygonStart: function() {
-	    lengthRing = true;
-	  },
-	  polygonEnd: function() {
-	    lengthRing = null;
-	  },
-	  result: function() {
-	    var length = +lengthSum$1;
-	    lengthSum$1.reset();
-	    return length;
-	  }
+	var epsilon = 1e-6;
+	var epsilon2 = 1e-12;
+	var pi = Math.PI;
+	var halfPi = pi / 2;
+	var quarterPi = pi / 4;
+	var tau = pi * 2;
+	var degrees = 180 / pi;
+	var radians = pi / 180;
+	var abs$2 = Math.abs;
+	var atan = Math.atan;
+	var atan2 = Math.atan2;
+	var cos = Math.cos;
+	var exp = Math.exp;
+	var hypot = Math.hypot;
+	var log$1 = Math.log;
+	var sin = Math.sin;
+	var sign = Math.sign || function (x) {
+	  return x > 0 ? 1 : x < 0 ? -1 : 0;
 	};
-
-	function lengthPointFirst$1(x, y) {
-	  lengthStream$1.point = lengthPoint$1;
-	  x00$2 = x0$4 = x, y00$2 = y0$4 = y;
+	var sqrt$1 = Math.sqrt;
+	var tan = Math.tan;
+	function acos(x) {
+	  return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
 	}
-
-	function lengthPoint$1(x, y) {
-	  x0$4 -= x, y0$4 -= y;
-	  lengthSum$1.add(sqrt(x0$4 * x0$4 + y0$4 * y0$4));
-	  x0$4 = x, y0$4 = y;
+	function asin(x) {
+	  return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
 	}
 
-	function PathString() {
-	  this._string = [];
+	function noop() {}
+
+	function streamGeometry(geometry, stream) {
+	  if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
+	    streamGeometryType[geometry.type](geometry, stream);
+	  }
 	}
 
-	PathString.prototype = {
-	  _radius: 4.5,
-	  _circle: circle(4.5),
-	  pointRadius: function(_) {
-	    if ((_ = +_) !== this._radius) { this._radius = _, this._circle = null; }
-	    return this;
+	var streamObjectType = {
+	  Feature: function Feature(object, stream) {
+	    streamGeometry(object.geometry, stream);
 	  },
-	  polygonStart: function() {
-	    this._line = 0;
+	  FeatureCollection: function FeatureCollection(object, stream) {
+	    var features = object.features,
+	        i = -1,
+	        n = features.length;
+
+	    while (++i < n) {
+	      streamGeometry(features[i].geometry, stream);
+	    }
+	  }
+	};
+	var streamGeometryType = {
+	  Sphere: function Sphere(object, stream) {
+	    stream.sphere();
 	  },
-	  polygonEnd: function() {
-	    this._line = NaN;
+	  Point: function Point(object, stream) {
+	    object = object.coordinates;
+	    stream.point(object[0], object[1], object[2]);
 	  },
-	  lineStart: function() {
-	    this._point = 0;
+	  MultiPoint: function MultiPoint(object, stream) {
+	    var coordinates = object.coordinates,
+	        i = -1,
+	        n = coordinates.length;
+
+	    while (++i < n) {
+	      object = coordinates[i], stream.point(object[0], object[1], object[2]);
+	    }
 	  },
-	  lineEnd: function() {
-	    if (this._line === 0) { this._string.push("Z"); }
-	    this._point = NaN;
+	  LineString: function LineString(object, stream) {
+	    streamLine(object.coordinates, stream, 0);
 	  },
-	  point: function(x, y) {
-	    switch (this._point) {
-	      case 0: {
-	        this._string.push("M", x, ",", y);
-	        this._point = 1;
-	        break;
-	      }
-	      case 1: {
-	        this._string.push("L", x, ",", y);
-	        break;
-	      }
-	      default: {
-	        if (this._circle == null) { this._circle = circle(this._radius); }
-	        this._string.push("M", x, ",", y, this._circle);
-	        break;
-	      }
+	  MultiLineString: function MultiLineString(object, stream) {
+	    var coordinates = object.coordinates,
+	        i = -1,
+	        n = coordinates.length;
+
+	    while (++i < n) {
+	      streamLine(coordinates[i], stream, 0);
 	    }
 	  },
-	  result: function() {
-	    if (this._string.length) {
-	      var result = this._string.join("");
-	      this._string = [];
-	      return result;
-	    } else {
-	      return null;
+	  Polygon: function Polygon(object, stream) {
+	    streamPolygon(object.coordinates, stream);
+	  },
+	  MultiPolygon: function MultiPolygon(object, stream) {
+	    var coordinates = object.coordinates,
+	        i = -1,
+	        n = coordinates.length;
+
+	    while (++i < n) {
+	      streamPolygon(coordinates[i], stream);
+	    }
+	  },
+	  GeometryCollection: function GeometryCollection(object, stream) {
+	    var geometries = object.geometries,
+	        i = -1,
+	        n = geometries.length;
+
+	    while (++i < n) {
+	      streamGeometry(geometries[i], stream);
 	    }
 	  }
 	};
 
-	function circle(radius) {
-	  return "m0," + radius
-	      + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius
-	      + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius
-	      + "z";
-	}
-
-	function d3_geoPath(projection, context) {
-	  var pointRadius = 4.5,
-	      projectionStream,
-	      contextStream;
+	function streamLine(coordinates, stream, closed) {
+	  var i = -1,
+	      n = coordinates.length - closed,
+	      coordinate;
+	  stream.lineStart();
 
-	  function path(object) {
-	    if (object) {
-	      if (typeof pointRadius === "function") { contextStream.pointRadius(+pointRadius.apply(this, arguments)); }
-	      d3_geoStream(object, projectionStream(contextStream));
-	    }
-	    return contextStream.result();
+	  while (++i < n) {
+	    coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
 	  }
 
-	  path.area = function(object) {
-	    d3_geoStream(object, projectionStream(areaStream$1));
-	    return areaStream$1.result();
-	  };
+	  stream.lineEnd();
+	}
 
-	  path.measure = function(object) {
-	    d3_geoStream(object, projectionStream(lengthStream$1));
-	    return lengthStream$1.result();
-	  };
+	function streamPolygon(coordinates, stream) {
+	  var i = -1,
+	      n = coordinates.length;
+	  stream.polygonStart();
 
-	  path.bounds = function(object) {
-	    d3_geoStream(object, projectionStream(boundsStream$1));
-	    return boundsStream$1.result();
-	  };
+	  while (++i < n) {
+	    streamLine(coordinates[i], stream, 1);
+	  }
 
-	  path.centroid = function(object) {
-	    d3_geoStream(object, projectionStream(centroidStream$1));
-	    return centroidStream$1.result();
-	  };
+	  stream.polygonEnd();
+	}
 
-	  path.projection = function(_) {
-	    return arguments.length ? (projectionStream = _ == null ? (projection = null, identity) : (projection = _).stream, path) : projection;
-	  };
+	function d3_geoStream (object, stream) {
+	  if (object && streamObjectType.hasOwnProperty(object.type)) {
+	    streamObjectType[object.type](object, stream);
+	  } else {
+	    streamGeometry(object, stream);
+	  }
+	}
 
-	  path.context = function(_) {
-	    if (!arguments.length) { return context; }
-	    contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _);
-	    if (typeof pointRadius !== "function") { contextStream.pointRadius(pointRadius); }
-	    return path;
-	  };
+	var areaRingSum = new Adder(); // hello?
 
-	  path.pointRadius = function(_) {
-	    if (!arguments.length) { return pointRadius; }
-	    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
-	    return path;
-	  };
+	var areaSum = new Adder(),
+	    lambda00,
+	    phi00,
+	    lambda0,
+	    cosPhi0,
+	    sinPhi0;
+	var areaStream = {
+	  point: noop,
+	  lineStart: noop,
+	  lineEnd: noop,
+	  polygonStart: function polygonStart() {
+	    areaRingSum = new Adder();
+	    areaStream.lineStart = areaRingStart;
+	    areaStream.lineEnd = areaRingEnd;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    var areaRing = +areaRingSum;
+	    areaSum.add(areaRing < 0 ? tau + areaRing : areaRing);
+	    this.lineStart = this.lineEnd = this.point = noop;
+	  },
+	  sphere: function sphere() {
+	    areaSum.add(tau);
+	  }
+	};
 
-	  return path.projection(projection).context(context);
+	function areaRingStart() {
+	  areaStream.point = areaPointFirst;
 	}
 
-	function d3_geoTransform(methods) {
-	  return {
-	    stream: transformer(methods)
-	  };
+	function areaRingEnd() {
+	  areaPoint(lambda00, phi00);
 	}
 
-	function transformer(methods) {
-	  return function(stream) {
-	    var s = new TransformStream;
-	    for (var key in methods) { s[key] = methods[key]; }
-	    s.stream = stream;
-	    return s;
-	  };
+	function areaPointFirst(lambda, phi) {
+	  areaStream.point = areaPoint;
+	  lambda00 = lambda, phi00 = phi;
+	  lambda *= radians, phi *= radians;
+	  lambda0 = lambda, cosPhi0 = cos(phi = phi / 2 + quarterPi), sinPhi0 = sin(phi);
 	}
 
-	function TransformStream() {}
+	function areaPoint(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  phi = phi / 2 + quarterPi; // half the angular distance from south pole
+	  // Spherical excess E for a spherical triangle with vertices: south pole,
+	  // previous point, current point.  Uses a formula derived from Cagnoli’s
+	  // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
 
-	TransformStream.prototype = {
-	  constructor: TransformStream,
-	  point: function(x, y) { this.stream.point(x, y); },
-	  sphere: function() { this.stream.sphere(); },
-	  lineStart: function() { this.stream.lineStart(); },
-	  lineEnd: function() { this.stream.lineEnd(); },
-	  polygonStart: function() { this.stream.polygonStart(); },
-	  polygonEnd: function() { this.stream.polygonEnd(); }
-	};
+	  var dLambda = lambda - lambda0,
+	      sdLambda = dLambda >= 0 ? 1 : -1,
+	      adLambda = sdLambda * dLambda,
+	      cosPhi = cos(phi),
+	      sinPhi = sin(phi),
+	      k = sinPhi0 * sinPhi,
+	      u = cosPhi0 * cosPhi + k * cos(adLambda),
+	      v = k * sdLambda * sin(adLambda);
+	  areaRingSum.add(atan2(v, u)); // Advance the previous points.
 
-	function fit(projection, fitBounds, object) {
-	  var clip = projection.clipExtent && projection.clipExtent();
-	  projection.scale(150).translate([0, 0]);
-	  if (clip != null) { projection.clipExtent(null); }
-	  d3_geoStream(object, projection.stream(boundsStream$1));
-	  fitBounds(boundsStream$1.result());
-	  if (clip != null) { projection.clipExtent(clip); }
-	  return projection;
+	  lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
 	}
 
-	function fitExtent(projection, extent, object) {
-	  return fit(projection, function(b) {
-	    var w = extent[1][0] - extent[0][0],
-	        h = extent[1][1] - extent[0][1],
-	        k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
-	        x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
-	        y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
-	    projection.scale(150 * k).translate([x, y]);
-	  }, object);
+	function d3_geoArea (object) {
+	  areaSum = new Adder();
+	  d3_geoStream(object, areaStream);
+	  return areaSum * 2;
 	}
 
-	function fitSize(projection, size, object) {
-	  return fitExtent(projection, [[0, 0], size], object);
+	function spherical(cartesian) {
+	  return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
 	}
+	function cartesian(spherical) {
+	  var lambda = spherical[0],
+	      phi = spherical[1],
+	      cosPhi = cos(phi);
+	  return [cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi)];
+	}
+	function cartesianDot(a, b) {
+	  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
+	}
+	function cartesianCross(a, b) {
+	  return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
+	} // TODO return a
 
-	function fitWidth(projection, width, object) {
-	  return fit(projection, function(b) {
-	    var w = +width,
-	        k = w / (b[1][0] - b[0][0]),
-	        x = (w - k * (b[1][0] + b[0][0])) / 2,
-	        y = -k * b[0][1];
-	    projection.scale(150 * k).translate([x, y]);
-	  }, object);
+	function cartesianAddInPlace(a, b) {
+	  a[0] += b[0], a[1] += b[1], a[2] += b[2];
 	}
+	function cartesianScale(vector, k) {
+	  return [vector[0] * k, vector[1] * k, vector[2] * k];
+	} // TODO return d
 
-	function fitHeight(projection, height, object) {
-	  return fit(projection, function(b) {
-	    var h = +height,
-	        k = h / (b[1][1] - b[0][1]),
-	        x = -k * b[0][0],
-	        y = (h - k * (b[1][1] + b[0][1])) / 2;
-	    projection.scale(150 * k).translate([x, y]);
-	  }, object);
+	function cartesianNormalizeInPlace(d) {
+	  var l = sqrt$1(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
+	  d[0] /= l, d[1] /= l, d[2] /= l;
 	}
 
-	var maxDepth = 16, // maximum depth of subdivision
-	    cosMinDistance = cos(30 * radians); // cos(minimum angular distance)
+	var lambda0$1, phi0, lambda1, phi1, // bounds
+	lambda2, // previous lambda-coordinate
+	lambda00$1, phi00$1, // first point
+	p0, // previous 3D point
+	deltaSum, ranges, range$1;
+	var boundsStream = {
+	  point: boundsPoint,
+	  lineStart: boundsLineStart,
+	  lineEnd: boundsLineEnd,
+	  polygonStart: function polygonStart() {
+	    boundsStream.point = boundsRingPoint;
+	    boundsStream.lineStart = boundsRingStart;
+	    boundsStream.lineEnd = boundsRingEnd;
+	    deltaSum = new Adder();
+	    areaStream.polygonStart();
+	  },
+	  polygonEnd: function polygonEnd() {
+	    areaStream.polygonEnd();
+	    boundsStream.point = boundsPoint;
+	    boundsStream.lineStart = boundsLineStart;
+	    boundsStream.lineEnd = boundsLineEnd;
+	    if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);else if (deltaSum > epsilon) phi1 = 90;else if (deltaSum < -epsilon) phi0 = -90;
+	    range$1[0] = lambda0$1, range$1[1] = lambda1;
+	  },
+	  sphere: function sphere() {
+	    lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
+	  }
+	};
 
-	function resample(project, delta2) {
-	  return +delta2 ? resample$1(project, delta2) : resampleNone(project);
+	function boundsPoint(lambda, phi) {
+	  ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]);
+	  if (phi < phi0) phi0 = phi;
+	  if (phi > phi1) phi1 = phi;
 	}
 
-	function resampleNone(project) {
-	  return transformer({
-	    point: function(x, y) {
-	      x = project(x, y);
-	      this.stream.point(x[0], x[1]);
-	    }
-	  });
-	}
+	function linePoint(lambda, phi) {
+	  var p = cartesian([lambda * radians, phi * radians]);
 
-	function resample$1(project, delta2) {
+	  if (p0) {
+	    var normal = cartesianCross(p0, p),
+	        equatorial = [normal[1], -normal[0], 0],
+	        inflection = cartesianCross(equatorial, normal);
+	    cartesianNormalizeInPlace(inflection);
+	    inflection = spherical(inflection);
+	    var delta = lambda - lambda2,
+	        sign = delta > 0 ? 1 : -1,
+	        lambdai = inflection[0] * degrees * sign,
+	        phii,
+	        antimeridian = abs$2(delta) > 180;
 
-	  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
-	    var dx = x1 - x0,
-	        dy = y1 - y0,
-	        d2 = dx * dx + dy * dy;
-	    if (d2 > 4 * delta2 && depth--) {
-	      var a = a0 + a1,
-	          b = b0 + b1,
-	          c = c0 + c1,
-	          m = sqrt(a * a + b * b + c * c),
-	          phi2 = asin(c /= m),
-	          lambda2 = abs$2(abs$2(c) - 1) < epsilon || abs$2(lambda0 - lambda1) < epsilon ? (lambda0 + lambda1) / 2 : atan2(b, a),
-	          p = project(lambda2, phi2),
-	          x2 = p[0],
-	          y2 = p[1],
-	          dx2 = x2 - x0,
-	          dy2 = y2 - y0,
-	          dz = dy * dx2 - dx * dy2;
-	      if (dz * dz / d2 > delta2 // perpendicular projected distance
-	          || abs$2((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
-	          || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance
-	        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
-	        stream.point(x2, y2);
-	        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
+	    if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
+	      phii = inflection[1] * degrees;
+	      if (phii > phi1) phi1 = phii;
+	    } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
+	      phii = -inflection[1] * degrees;
+	      if (phii < phi0) phi0 = phii;
+	    } else {
+	      if (phi < phi0) phi0 = phi;
+	      if (phi > phi1) phi1 = phi;
+	    }
+
+	    if (antimeridian) {
+	      if (lambda < lambda2) {
+	        if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
+	      } else {
+	        if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
+	      }
+	    } else {
+	      if (lambda1 >= lambda0$1) {
+	        if (lambda < lambda0$1) lambda0$1 = lambda;
+	        if (lambda > lambda1) lambda1 = lambda;
+	      } else {
+	        if (lambda > lambda2) {
+	          if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
+	        } else {
+	          if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
+	        }
 	      }
 	    }
+	  } else {
+	    ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]);
 	  }
-	  return function(stream) {
-	    var lambda00, x00, y00, a00, b00, c00, // first point
-	        lambda0, x0, y0, a0, b0, c0; // previous point
-
-	    var resampleStream = {
-	      point: point,
-	      lineStart: lineStart,
-	      lineEnd: lineEnd,
-	      polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },
-	      polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }
-	    };
 
-	    function point(x, y) {
-	      x = project(x, y);
-	      stream.point(x[0], x[1]);
-	    }
+	  if (phi < phi0) phi0 = phi;
+	  if (phi > phi1) phi1 = phi;
+	  p0 = p, lambda2 = lambda;
+	}
 
-	    function lineStart() {
-	      x0 = NaN;
-	      resampleStream.point = linePoint;
-	      stream.lineStart();
-	    }
-
-	    function linePoint(lambda, phi) {
-	      var c = cartesian([lambda, phi]), p = project(lambda, phi);
-	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
-	      stream.point(x0, y0);
-	    }
-
-	    function lineEnd() {
-	      resampleStream.point = point;
-	      stream.lineEnd();
-	    }
-
-	    function ringStart() {
-	      lineStart();
-	      resampleStream.point = ringPoint;
-	      resampleStream.lineEnd = ringEnd;
-	    }
-
-	    function ringPoint(lambda, phi) {
-	      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
-	      resampleStream.point = linePoint;
-	    }
-
-	    function ringEnd() {
-	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
-	      resampleStream.lineEnd = lineEnd;
-	      lineEnd();
-	    }
-
-	    return resampleStream;
-	  };
+	function boundsLineStart() {
+	  boundsStream.point = linePoint;
 	}
 
-	var transformRadians = transformer({
-	  point: function(x, y) {
-	    this.stream.point(x * radians, y * radians);
-	  }
-	});
-
-	function transformRotate(rotate) {
-	  return transformer({
-	    point: function(x, y) {
-	      var r = rotate(x, y);
-	      return this.stream.point(r[0], r[1]);
-	    }
-	  });
+	function boundsLineEnd() {
+	  range$1[0] = lambda0$1, range$1[1] = lambda1;
+	  boundsStream.point = boundsPoint;
+	  p0 = null;
 	}
 
-	function scaleTranslate(k, dx, dy, sx, sy) {
-	  function transform(x, y) {
-	    x *= sx; y *= sy;
-	    return [dx + k * x, dy - k * y];
+	function boundsRingPoint(lambda, phi) {
+	  if (p0) {
+	    var delta = lambda - lambda2;
+	    deltaSum.add(abs$2(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
+	  } else {
+	    lambda00$1 = lambda, phi00$1 = phi;
 	  }
-	  transform.invert = function(x, y) {
-	    return [(x - dx) / k * sx, (dy - y) / k * sy];
-	  };
-	  return transform;
-	}
 
-	function scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
-	  var cosAlpha = cos(alpha),
-	      sinAlpha = sin(alpha),
-	      a = cosAlpha * k,
-	      b = sinAlpha * k,
-	      ai = cosAlpha / k,
-	      bi = sinAlpha / k,
-	      ci = (sinAlpha * dy - cosAlpha * dx) / k,
-	      fi = (sinAlpha * dx + cosAlpha * dy) / k;
-	  function transform(x, y) {
-	    x *= sx; y *= sy;
-	    return [a * x - b * y + dx, dy - b * x - a * y];
-	  }
-	  transform.invert = function(x, y) {
-	    return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
-	  };
-	  return transform;
+	  areaStream.point(lambda, phi);
+	  linePoint(lambda, phi);
 	}
 
-	function projection(project) {
-	  return projectionMutator(function() { return project; })();
+	function boundsRingStart() {
+	  areaStream.lineStart();
 	}
 
-	function projectionMutator(projectAt) {
-	  var project,
-	      k = 150, // scale
-	      x = 480, y = 250, // translate
-	      lambda = 0, phi = 0, // center
-	      deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, // pre-rotate
-	      alpha = 0, // post-rotate angle
-	      sx = 1, // reflectX
-	      sy = 1, // reflectX
-	      theta = null, preclip = clipAntimeridian, // pre-clip angle
-	      x0 = null, y0, x1, y1, postclip = identity, // post-clip extent
-	      delta2 = 0.5, // precision
-	      projectResample,
-	      projectTransform,
-	      projectRotateTransform,
-	      cache,
-	      cacheStream;
-
-	  function projection(point) {
-	    return projectRotateTransform(point[0] * radians, point[1] * radians);
-	  }
+	function boundsRingEnd() {
+	  boundsRingPoint(lambda00$1, phi00$1);
+	  areaStream.lineEnd();
+	  if (abs$2(deltaSum) > epsilon) lambda0$1 = -(lambda1 = 180);
+	  range$1[0] = lambda0$1, range$1[1] = lambda1;
+	  p0 = null;
+	} // Finds the left-right distance between two longitudes.
+	// This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
+	// the distance between ±180° to be 360°.
 
-	  function invert(point) {
-	    point = projectRotateTransform.invert(point[0], point[1]);
-	    return point && [point[0] * degrees, point[1] * degrees];
-	  }
 
-	  projection.stream = function(stream) {
-	    return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
-	  };
+	function angle(lambda0, lambda1) {
+	  return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
+	}
 
-	  projection.preclip = function(_) {
-	    return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
-	  };
+	function rangeCompare(a, b) {
+	  return a[0] - b[0];
+	}
 
-	  projection.postclip = function(_) {
-	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
-	  };
+	function rangeContains(range, x) {
+	  return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
+	}
 
-	  projection.clipAngle = function(_) {
-	    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees;
-	  };
+	function d3_geoBounds (feature) {
+	  var i, n, a, b, merged, deltaMax, delta;
+	  phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
+	  ranges = [];
+	  d3_geoStream(feature, boundsStream); // First, sort ranges by their minimum longitudes.
 
-	  projection.clipExtent = function(_) {
-	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-	  };
+	  if (n = ranges.length) {
+	    ranges.sort(rangeCompare); // Then, merge any ranges that overlap.
 
-	  projection.scale = function(_) {
-	    return arguments.length ? (k = +_, recenter()) : k;
-	  };
+	    for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
+	      b = ranges[i];
 
-	  projection.translate = function(_) {
-	    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
-	  };
+	      if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
+	        if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
+	        if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
+	      } else {
+	        merged.push(a = b);
+	      }
+	    } // Finally, find the largest gap between the merged ranges.
+	    // The final bounding box will be the inverse of this gap.
 
-	  projection.center = function(_) {
-	    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees, phi * degrees];
-	  };
 
-	  projection.rotate = function(_) {
-	    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees, deltaPhi * degrees, deltaGamma * degrees];
-	  };
+	    for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
+	      b = merged[i];
+	      if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];
+	    }
+	  }
 
-	  projection.angle = function(_) {
-	    return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees;
-	  };
+	  ranges = range$1 = null;
+	  return lambda0$1 === Infinity || phi0 === Infinity ? [[NaN, NaN], [NaN, NaN]] : [[lambda0$1, phi0], [lambda1, phi1]];
+	}
 
-	  projection.reflectX = function(_) {
-	    return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
-	  };
+	var W0, W1, X0, Y0, Z0, X1, Y1, Z1, X2, Y2, Z2, lambda00$2, phi00$2, // first point
+	x0, y0, z0; // previous point
 
-	  projection.reflectY = function(_) {
-	    return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
-	  };
+	var centroidStream = {
+	  sphere: noop,
+	  point: centroidPoint,
+	  lineStart: centroidLineStart,
+	  lineEnd: centroidLineEnd,
+	  polygonStart: function polygonStart() {
+	    centroidStream.lineStart = centroidRingStart;
+	    centroidStream.lineEnd = centroidRingEnd;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    centroidStream.lineStart = centroidLineStart;
+	    centroidStream.lineEnd = centroidLineEnd;
+	  }
+	}; // Arithmetic mean of Cartesian vectors.
 
-	  projection.precision = function(_) {
-	    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
-	  };
+	function centroidPoint(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  var cosPhi = cos(phi);
+	  centroidPointCartesian(cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi));
+	}
 
-	  projection.fitExtent = function(extent, object) {
-	    return fitExtent(projection, extent, object);
-	  };
+	function centroidPointCartesian(x, y, z) {
+	  ++W0;
+	  X0 += (x - X0) / W0;
+	  Y0 += (y - Y0) / W0;
+	  Z0 += (z - Z0) / W0;
+	}
 
-	  projection.fitSize = function(size, object) {
-	    return fitSize(projection, size, object);
-	  };
+	function centroidLineStart() {
+	  centroidStream.point = centroidLinePointFirst;
+	}
 
-	  projection.fitWidth = function(width, object) {
-	    return fitWidth(projection, width, object);
-	  };
+	function centroidLinePointFirst(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  var cosPhi = cos(phi);
+	  x0 = cosPhi * cos(lambda);
+	  y0 = cosPhi * sin(lambda);
+	  z0 = sin(phi);
+	  centroidStream.point = centroidLinePoint;
+	  centroidPointCartesian(x0, y0, z0);
+	}
 
-	  projection.fitHeight = function(height, object) {
-	    return fitHeight(projection, height, object);
-	  };
+	function centroidLinePoint(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  var cosPhi = cos(phi),
+	      x = cosPhi * cos(lambda),
+	      y = cosPhi * sin(lambda),
+	      z = sin(phi),
+	      w = atan2(sqrt$1((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
+	  W1 += w;
+	  X1 += w * (x0 + (x0 = x));
+	  Y1 += w * (y0 + (y0 = y));
+	  Z1 += w * (z0 + (z0 = z));
+	  centroidPointCartesian(x0, y0, z0);
+	}
 
-	  function recenter() {
-	    var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
-	        transform = (alpha ? scaleTranslateRotate : scaleTranslate)(k, x - center[0], y - center[1], sx, sy, alpha);
-	    rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
-	    projectTransform = compose(project, transform);
-	    projectRotateTransform = compose(rotate, projectTransform);
-	    projectResample = resample(projectTransform, delta2);
-	    return reset();
-	  }
+	function centroidLineEnd() {
+	  centroidStream.point = centroidPoint;
+	} // See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
+	// J. Applied Mechanics 42, 239 (1975).
 
-	  function reset() {
-	    cache = cacheStream = null;
-	    return projection;
-	  }
 
-	  return function() {
-	    project = projectAt.apply(this, arguments);
-	    projection.invert = project.invert && invert;
-	    return recenter();
-	  };
+	function centroidRingStart() {
+	  centroidStream.point = centroidRingPointFirst;
 	}
 
-	function mercatorRaw(lambda, phi) {
-	  return [lambda, log(tan((halfPi + phi) / 2))];
+	function centroidRingEnd() {
+	  centroidRingPoint(lambda00$2, phi00$2);
+	  centroidStream.point = centroidPoint;
 	}
 
-	mercatorRaw.invert = function(x, y) {
-	  return [x, 2 * atan(exp(y)) - halfPi];
-	};
-
-	function mercator() {
-	  return mercatorProjection(mercatorRaw)
-	      .scale(961 / tau);
+	function centroidRingPointFirst(lambda, phi) {
+	  lambda00$2 = lambda, phi00$2 = phi;
+	  lambda *= radians, phi *= radians;
+	  centroidStream.point = centroidRingPoint;
+	  var cosPhi = cos(phi);
+	  x0 = cosPhi * cos(lambda);
+	  y0 = cosPhi * sin(lambda);
+	  z0 = sin(phi);
+	  centroidPointCartesian(x0, y0, z0);
 	}
 
-	function mercatorProjection(project) {
-	  var m = projection(project),
-	      center = m.center,
-	      scale = m.scale,
-	      translate = m.translate,
-	      clipExtent = m.clipExtent,
-	      x0 = null, y0, x1, y1; // clip extent
-
-	  m.scale = function(_) {
-	    return arguments.length ? (scale(_), reclip()) : scale();
-	  };
+	function centroidRingPoint(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  var cosPhi = cos(phi),
+	      x = cosPhi * cos(lambda),
+	      y = cosPhi * sin(lambda),
+	      z = sin(phi),
+	      cx = y0 * z - z0 * y,
+	      cy = z0 * x - x0 * z,
+	      cz = x0 * y - y0 * x,
+	      m = hypot(cx, cy, cz),
+	      w = asin(m),
+	      // line weight = angle
+	  v = m && -w / m; // area weight multiplier
+
+	  X2.add(v * cx);
+	  Y2.add(v * cy);
+	  Z2.add(v * cz);
+	  W1 += w;
+	  X1 += w * (x0 + (x0 = x));
+	  Y1 += w * (y0 + (y0 = y));
+	  Z1 += w * (z0 + (z0 = z));
+	  centroidPointCartesian(x0, y0, z0);
+	}
 
-	  m.translate = function(_) {
-	    return arguments.length ? (translate(_), reclip()) : translate();
-	  };
+	function d3_geoCentroid (object) {
+	  W0 = W1 = X0 = Y0 = Z0 = X1 = Y1 = Z1 = 0;
+	  X2 = new Adder();
+	  Y2 = new Adder();
+	  Z2 = new Adder();
+	  d3_geoStream(object, centroidStream);
+	  var x = +X2,
+	      y = +Y2,
+	      z = +Z2,
+	      m = hypot(x, y, z); // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
 
-	  m.center = function(_) {
-	    return arguments.length ? (center(_), reclip()) : center();
-	  };
+	  if (m < epsilon2) {
+	    x = X1, y = Y1, z = Z1; // If the feature has zero length, fall back to arithmetic mean of point vectors.
 
-	  m.clipExtent = function(_) {
-	    return arguments.length ? ((_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1])), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-	  };
+	    if (W1 < epsilon) x = X0, y = Y0, z = Z0;
+	    m = hypot(x, y, z); // If the feature still has an undefined ccentroid, then return.
 
-	  function reclip() {
-	    var k = pi * scale(),
-	        t = m(rotation(m.rotate()).invert([0, 0]));
-	    return clipExtent(x0 == null
-	        ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw
-	        ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]]
-	        : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
+	    if (m < epsilon2) return [NaN, NaN];
 	  }
 
-	  return reclip();
+	  return [atan2(y, x) * degrees, asin(z / m) * degrees];
 	}
 
-	function d3_geoIdentity() {
-	  var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, // scale, translate and reflect
-	      alpha = 0, ca, sa, // angle
-	      x0 = null, y0, x1, y1, // clip extent
-	      kx = 1, ky = 1,
-	      transform = transformer({
-	        point: function(x, y) {
-	          var p = projection([x, y]);
-	          this.stream.point(p[0], p[1]);
-	        }
-	      }),
-	      postclip = identity,
-	      cache,
-	      cacheStream;
-
-	  function reset() {
-	    kx = k * sx;
-	    ky = k * sy;
-	    cache = cacheStream = null;
-	    return projection;
+	function compose (a, b) {
+	  function compose(x, y) {
+	    return x = a(x, y), b(x[0], x[1]);
 	  }
 
-	  function projection (p) {
-	    var x = p[0] * kx, y = p[1] * ky;
-	    if (alpha) {
-	      var t = y * ca - x * sa;
-	      x = x * ca + y * sa;
-	      y = t;
-	    }    
-	    return [x + tx, y + ty];
-	  }
-	  projection.invert = function(p) {
-	    var x = p[0] - tx, y = p[1] - ty;
-	    if (alpha) {
-	      var t = y * ca + x * sa;
-	      x = x * ca - y * sa;
-	      y = t;
-	    }
-	    return [x / kx, y / ky];
-	  };
-	  projection.stream = function(stream) {
-	    return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
-	  };
-	  projection.postclip = function(_) {
-	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
-	  };
-	  projection.clipExtent = function(_) {
-	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-	  };
-	  projection.scale = function(_) {
-	    return arguments.length ? (k = +_, reset()) : k;
-	  };
-	  projection.translate = function(_) {
-	    return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
-	  };
-	  projection.angle = function(_) {
-	    return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees;
-	  };
-	  projection.reflectX = function(_) {
-	    return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
-	  };
-	  projection.reflectY = function(_) {
-	    return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
-	  };
-	  projection.fitExtent = function(extent, object) {
-	    return fitExtent(projection, extent, object);
-	  };
-	  projection.fitSize = function(size, object) {
-	    return fitSize(projection, size, object);
-	  };
-	  projection.fitWidth = function(width, object) {
-	    return fitWidth(projection, width, object);
-	  };
-	  projection.fitHeight = function(height, object) {
-	    return fitHeight(projection, height, object);
+	  if (a.invert && b.invert) compose.invert = function (x, y) {
+	    return x = b.invert(x, y), x && a.invert(x[0], x[1]);
 	  };
-
-	  return projection;
+	  return compose;
 	}
 
-	// constants
-	var TAU = 2 * Math.PI;
-	var EQUATORIAL_RADIUS = 6356752.314245179;
-	var POLAR_RADIUS = 6378137.0;
-
-
-	function geoLatToMeters(dLat) {
-	    return dLat * (TAU * POLAR_RADIUS / 360);
+	function rotationIdentity(lambda, phi) {
+	  return [abs$2(lambda) > pi ? lambda + Math.round(-lambda / tau) * tau : lambda, phi];
 	}
 
-
-	function geoLonToMeters(dLon, atLat) {
-	    return Math.abs(atLat) >= 90 ? 0 :
-	        dLon * (TAU * EQUATORIAL_RADIUS / 360) * Math.abs(Math.cos(atLat * (Math.PI / 180)));
+	rotationIdentity.invert = rotationIdentity;
+	function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
+	  return (deltaLambda %= tau) ? deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma)) : rotationLambda(deltaLambda) : deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma) : rotationIdentity;
 	}
 
-
-	function geoMetersToLat(m) {
-	    return m / (TAU * POLAR_RADIUS / 360);
+	function forwardRotationLambda(deltaLambda) {
+	  return function (lambda, phi) {
+	    return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
+	  };
 	}
 
-
-	function geoMetersToLon(m, atLat) {
-	    return Math.abs(atLat) >= 90 ? 0 :
-	        m / (TAU * EQUATORIAL_RADIUS / 360) / Math.abs(Math.cos(atLat * (Math.PI / 180)));
+	function rotationLambda(deltaLambda) {
+	  var rotation = forwardRotationLambda(deltaLambda);
+	  rotation.invert = forwardRotationLambda(-deltaLambda);
+	  return rotation;
 	}
 
+	function rotationPhiGamma(deltaPhi, deltaGamma) {
+	  var cosDeltaPhi = cos(deltaPhi),
+	      sinDeltaPhi = sin(deltaPhi),
+	      cosDeltaGamma = cos(deltaGamma),
+	      sinDeltaGamma = sin(deltaGamma);
 
-	function geoMetersToOffset(meters, tileSize) {
-	    tileSize = tileSize || 256;
-	    return [
-	        meters[0] * tileSize / (TAU * EQUATORIAL_RADIUS),
-	        -meters[1] * tileSize / (TAU * POLAR_RADIUS)
-	    ];
-	}
+	  function rotation(lambda, phi) {
+	    var cosPhi = cos(phi),
+	        x = cos(lambda) * cosPhi,
+	        y = sin(lambda) * cosPhi,
+	        z = sin(phi),
+	        k = z * cosDeltaPhi + x * sinDeltaPhi;
+	    return [atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi), asin(k * cosDeltaGamma + y * sinDeltaGamma)];
+	  }
 
+	  rotation.invert = function (lambda, phi) {
+	    var cosPhi = cos(phi),
+	        x = cos(lambda) * cosPhi,
+	        y = sin(lambda) * cosPhi,
+	        z = sin(phi),
+	        k = z * cosDeltaGamma - y * sinDeltaGamma;
+	    return [atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi), asin(k * cosDeltaPhi - x * sinDeltaPhi)];
+	  };
 
-	function geoOffsetToMeters(offset, tileSize) {
-	    tileSize = tileSize || 256;
-	    return [
-	        offset[0] * TAU * EQUATORIAL_RADIUS / tileSize,
-	        -offset[1] * TAU * POLAR_RADIUS / tileSize
-	    ];
+	  return rotation;
 	}
 
+	function rotation (rotate) {
+	  rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
 
-	// Equirectangular approximation of spherical distances on Earth
-	function geoSphericalDistance(a, b) {
-	    var x = geoLonToMeters(a[0] - b[0], (a[1] + b[1]) / 2);
-	    var y = geoLatToMeters(a[1] - b[1]);
-	    return Math.sqrt((x * x) + (y * y));
-	}
+	  function forward(coordinates) {
+	    coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
+	    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
+	  }
 
+	  forward.invert = function (coordinates) {
+	    coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
+	    return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
+	  };
 
-	// scale to zoom
-	function geoScaleToZoom(k, tileSize) {
-	    tileSize = tileSize || 256;
-	    var log2ts = Math.log(tileSize) * Math.LOG2E;
-	    return Math.log(k * TAU) / Math.LN2 - log2ts;
+	  return forward;
 	}
 
+	function circleStream(stream, radius, delta, direction, t0, t1) {
+	  if (!delta) return;
+	  var cosRadius = cos(radius),
+	      sinRadius = sin(radius),
+	      step = direction * delta;
 
-	// zoom to scale
-	function geoZoomToScale(z, tileSize) {
-	    tileSize = tileSize || 256;
-	    return tileSize * Math.pow(2, z) / TAU;
-	}
-
+	  if (t0 == null) {
+	    t0 = radius + direction * tau;
+	    t1 = radius - step / 2;
+	  } else {
+	    t0 = circleRadius(cosRadius, t0);
+	    t1 = circleRadius(cosRadius, t1);
+	    if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau;
+	  }
 
-	// returns info about the node from `nodes` closest to the given `point`
-	function geoSphericalClosestNode(nodes, point) {
-	    var minDistance = Infinity, distance;
-	    var indexOfMin;
+	  for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
+	    point = spherical([cosRadius, -sinRadius * cos(t), -sinRadius * sin(t)]);
+	    stream.point(point[0], point[1]);
+	  }
+	} // Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
 
-	    for (var i in nodes) {
-	        distance = geoSphericalDistance(nodes[i].loc, point);
-	        if (distance < minDistance) {
-	            minDistance = distance;
-	            indexOfMin = i;
-	        }
-	    }
+	function circleRadius(cosRadius, point) {
+	  point = cartesian(point), point[0] -= cosRadius;
+	  cartesianNormalizeInPlace(point);
+	  var radius = acos(-point[1]);
+	  return ((-point[2] < 0 ? -radius : radius) + tau - epsilon) % tau;
+	}
 
-	    if (indexOfMin !== undefined) {
-	        return { index: indexOfMin, distance: minDistance, node: nodes[indexOfMin] };
-	    } else {
-	        return null;
+	function clipBuffer () {
+	  var lines = [],
+	      line;
+	  return {
+	    point: function point(x, y, m) {
+	      line.push([x, y, m]);
+	    },
+	    lineStart: function lineStart() {
+	      lines.push(line = []);
+	    },
+	    lineEnd: noop,
+	    rejoin: function rejoin() {
+	      if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
+	    },
+	    result: function result() {
+	      var result = lines;
+	      lines = [];
+	      line = null;
+	      return result;
 	    }
+	  };
 	}
 
-	function geoExtent(min, max) {
-	    if (!(this instanceof geoExtent)) {
-	        return new geoExtent(min, max);
-	    } else if (min instanceof geoExtent) {
-	        return min;
-	    } else if (min && min.length === 2 && min[0].length === 2 && min[1].length === 2) {
-	        this[0] = min[0];
-	        this[1] = min[1];
-	    } else {
-	        this[0] = min        || [ Infinity,  Infinity];
-	        this[1] = max || min || [-Infinity, -Infinity];
-	    }
+	function pointEqual (a, b) {
+	  return abs$2(a[0] - b[0]) < epsilon && abs$2(a[1] - b[1]) < epsilon;
 	}
 
-	geoExtent.prototype = new Array(2);
+	function Intersection(point, points, other, entry) {
+	  this.x = point;
+	  this.z = points;
+	  this.o = other; // another intersection
 
-	Object.assign(geoExtent.prototype, {
+	  this.e = entry; // is an entry?
 
-	    equals: function (obj) {
-	        return this[0][0] === obj[0][0] &&
-	            this[0][1] === obj[0][1] &&
-	            this[1][0] === obj[1][0] &&
-	            this[1][1] === obj[1][1];
-	    },
+	  this.v = false; // visited
 
+	  this.n = this.p = null; // next & previous
+	} // A generalized polygon clipping algorithm: given a polygon that has been cut
+	// into its visible line segments, and rejoins the segments by interpolating
+	// along the clip edge.
 
-	    extend: function(obj) {
-	        if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-	        return geoExtent(
-	            [Math.min(obj[0][0], this[0][0]), Math.min(obj[0][1], this[0][1])],
-	            [Math.max(obj[1][0], this[1][0]), Math.max(obj[1][1], this[1][1])]
-	        );
-	    },
 
+	function clipRejoin (segments, compareIntersection, startInside, interpolate, stream) {
+	  var subject = [],
+	      clip = [],
+	      i,
+	      n;
+	  segments.forEach(function (segment) {
+	    if ((n = segment.length - 1) <= 0) return;
+	    var n,
+	        p0 = segment[0],
+	        p1 = segment[n],
+	        x;
 
-	    _extend: function(extent) {
-	        this[0][0] = Math.min(extent[0][0], this[0][0]);
-	        this[0][1] = Math.min(extent[0][1], this[0][1]);
-	        this[1][0] = Math.max(extent[1][0], this[1][0]);
-	        this[1][1] = Math.max(extent[1][1], this[1][1]);
-	    },
+	    if (pointEqual(p0, p1)) {
+	      if (!p0[2] && !p1[2]) {
+	        stream.lineStart();
 
+	        for (i = 0; i < n; ++i) {
+	          stream.point((p0 = segment[i])[0], p0[1]);
+	        }
 
-	    area: function() {
-	        return Math.abs((this[1][0] - this[0][0]) * (this[1][1] - this[0][1]));
-	    },
+	        stream.lineEnd();
+	        return;
+	      } // handle degenerate cases by moving the point
 
 
-	    center: function() {
-	        return [(this[0][0] + this[1][0]) / 2, (this[0][1] + this[1][1]) / 2];
-	    },
+	      p1[0] += 2 * epsilon;
+	    }
 
+	    subject.push(x = new Intersection(p0, segment, null, true));
+	    clip.push(x.o = new Intersection(p0, null, x, false));
+	    subject.push(x = new Intersection(p1, segment, null, false));
+	    clip.push(x.o = new Intersection(p1, null, x, true));
+	  });
+	  if (!subject.length) return;
+	  clip.sort(compareIntersection);
+	  link(subject);
+	  link(clip);
 
-	    rectangle: function() {
-	        return [this[0][0], this[0][1], this[1][0], this[1][1]];
-	    },
+	  for (i = 0, n = clip.length; i < n; ++i) {
+	    clip[i].e = startInside = !startInside;
+	  }
 
+	  var start = subject[0],
+	      points,
+	      point;
 
-	    bbox: function() {
-	        return { minX: this[0][0], minY: this[0][1], maxX: this[1][0], maxY: this[1][1] };
-	    },
+	  while (1) {
+	    // Find first unvisited intersection.
+	    var current = start,
+	        isSubject = true;
 
+	    while (current.v) {
+	      if ((current = current.n) === start) return;
+	    }
 
-	    polygon: function() {
-	        return [
-	            [this[0][0], this[0][1]],
-	            [this[0][0], this[1][1]],
-	            [this[1][0], this[1][1]],
-	            [this[1][0], this[0][1]],
-	            [this[0][0], this[0][1]]
-	        ];
-	    },
+	    points = current.z;
+	    stream.lineStart();
 
+	    do {
+	      current.v = current.o.v = true;
 
-	    contains: function(obj) {
-	        if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-	        return obj[0][0] >= this[0][0] &&
-	               obj[0][1] >= this[0][1] &&
-	               obj[1][0] <= this[1][0] &&
-	               obj[1][1] <= this[1][1];
-	    },
+	      if (current.e) {
+	        if (isSubject) {
+	          for (i = 0, n = points.length; i < n; ++i) {
+	            stream.point((point = points[i])[0], point[1]);
+	          }
+	        } else {
+	          interpolate(current.x, current.n.x, 1, stream);
+	        }
 
+	        current = current.n;
+	      } else {
+	        if (isSubject) {
+	          points = current.p.z;
 
-	    intersects: function(obj) {
-	        if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-	        return obj[0][0] <= this[1][0] &&
-	               obj[0][1] <= this[1][1] &&
-	               obj[1][0] >= this[0][0] &&
-	               obj[1][1] >= this[0][1];
-	    },
+	          for (i = points.length - 1; i >= 0; --i) {
+	            stream.point((point = points[i])[0], point[1]);
+	          }
+	        } else {
+	          interpolate(current.x, current.p.x, -1, stream);
+	        }
 
+	        current = current.p;
+	      }
 
-	    intersection: function(obj) {
-	        if (!this.intersects(obj)) { return new geoExtent(); }
-	        return new geoExtent(
-	            [Math.max(obj[0][0], this[0][0]), Math.max(obj[0][1], this[0][1])],
-	            [Math.min(obj[1][0], this[1][0]), Math.min(obj[1][1], this[1][1])]
-	        );
-	    },
-
-
-	    percentContainedIn: function(obj) {
-	        if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-	        var a1 = this.intersection(obj).area();
-	        var a2 = this.area();
-
-	        if (a1 === Infinity || a2 === Infinity) {
-	            return 0;
-	        } else if (a1 === 0 || a2 === 0) {
-	            if (obj.contains(this)) {
-	                return 1;
-	            }
-	            return 0;
-	        } else {
-	            return a1 / a2;
-	        }
-	    },
-
-
-	    padByMeters: function(meters) {
-	        var dLat = geoMetersToLat(meters);
-	        var dLon = geoMetersToLon(meters, this.center()[1]);
-	        return geoExtent(
-	            [this[0][0] - dLon, this[0][1] - dLat],
-	            [this[1][0] + dLon, this[1][1] + dLat]
-	        );
-	    },
-
-
-	    toParam: function() {
-	        return this.rectangle().join(',');
-	    }
-
-	});
-
-	function d3_polygonArea(polygon) {
-	  var i = -1,
-	      n = polygon.length,
-	      a,
-	      b = polygon[n - 1],
-	      area = 0;
+	      current = current.o;
+	      points = current.z;
+	      isSubject = !isSubject;
+	    } while (!current.v);
 
-	  while (++i < n) {
-	    a = b;
-	    b = polygon[i];
-	    area += a[1] * b[0] - a[0] * b[1];
+	    stream.lineEnd();
 	  }
-
-	  return area / 2;
 	}
 
-	function d3_polygonCentroid(polygon) {
-	  var i = -1,
-	      n = polygon.length,
-	      x = 0,
-	      y = 0,
-	      a,
-	      b = polygon[n - 1],
-	      c,
-	      k = 0;
+	function link(array) {
+	  if (!(n = array.length)) return;
+	  var n,
+	      i = 0,
+	      a = array[0],
+	      b;
 
 	  while (++i < n) {
+	    a.n = b = array[i];
+	    b.p = a;
 	    a = b;
-	    b = polygon[i];
-	    k += c = a[0] * b[1] - b[0] * a[1];
-	    x += (a[0] + b[0]) * c;
-	    y += (a[1] + b[1]) * c;
 	  }
 
-	  return k *= 3, [x / k, y / k];
+	  a.n = b = array[0];
+	  b.p = a;
 	}
 
-	// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
-	// the 3D cross product in a quadrant I Cartesian coordinate system (+x is
-	// right, +y is up). Returns a positive value if ABC is counter-clockwise,
-	// negative if clockwise, and zero if the points are collinear.
-	function cross(a, b, c) {
-	  return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
+	function longitude(point) {
+	  if (abs$2(point[0]) <= pi) return point[0];else return sign(point[0]) * ((abs$2(point[0]) + pi) % tau - pi);
 	}
 
-	function lexicographicOrder(a, b) {
-	  return a[0] - b[0] || a[1] - b[1];
-	}
+	function polygonContains (polygon, point) {
+	  var lambda = longitude(point),
+	      phi = point[1],
+	      sinPhi = sin(phi),
+	      normal = [sin(lambda), -cos(lambda), 0],
+	      angle = 0,
+	      winding = 0;
+	  var sum = new Adder();
+	  if (sinPhi === 1) phi = halfPi + epsilon;else if (sinPhi === -1) phi = -halfPi - epsilon;
 
-	// Computes the upper convex hull per the monotone chain algorithm.
-	// Assumes points.length >= 3, is sorted by x, unique in y.
-	// Returns an array of indices into points in left-to-right order.
-	function computeUpperHullIndexes(points) {
-	  var n = points.length,
-	      indexes = [0, 1],
-	      size = 2;
+	  for (var i = 0, n = polygon.length; i < n; ++i) {
+	    if (!(m = (ring = polygon[i]).length)) continue;
+	    var ring,
+	        m,
+	        point0 = ring[m - 1],
+	        lambda0 = longitude(point0),
+	        phi0 = point0[1] / 2 + quarterPi,
+	        sinPhi0 = sin(phi0),
+	        cosPhi0 = cos(phi0);
 
-	  for (var i = 2; i < n; ++i) {
-	    while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) { --size; }
-	    indexes[size++] = i;
-	  }
+	    for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
+	      var point1 = ring[j],
+	          lambda1 = longitude(point1),
+	          phi1 = point1[1] / 2 + quarterPi,
+	          sinPhi1 = sin(phi1),
+	          cosPhi1 = cos(phi1),
+	          delta = lambda1 - lambda0,
+	          sign = delta >= 0 ? 1 : -1,
+	          absDelta = sign * delta,
+	          antimeridian = absDelta > pi,
+	          k = sinPhi0 * sinPhi1;
+	      sum.add(atan2(k * sign * sin(absDelta), cosPhi0 * cosPhi1 + k * cos(absDelta)));
+	      angle += antimeridian ? delta + sign * tau : delta; // Are the longitudes either side of the point’s meridian (lambda),
+	      // and are the latitudes smaller than the parallel (phi)?
 
-	  return indexes.slice(0, size); // remove popped points
+	      if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
+	        var arc = cartesianCross(cartesian(point0), cartesian(point1));
+	        cartesianNormalizeInPlace(arc);
+	        var intersection = cartesianCross(normal, arc);
+	        cartesianNormalizeInPlace(intersection);
+	        var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
+
+	        if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
+	          winding += antimeridian ^ delta >= 0 ? 1 : -1;
+	        }
+	      }
+	    }
+	  } // First, determine whether the South pole is inside or outside:
+	  //
+	  // It is inside if:
+	  // * the polygon winds around it in a clockwise direction.
+	  // * the polygon does not (cumulatively) wind around it, but has a negative
+	  //   (counter-clockwise) area.
+	  //
+	  // Second, count the (signed) number of times a segment crosses a lambda
+	  // from the point to the South pole.  If it is zero, then the point is the
+	  // same side as the South pole.
+
+
+	  return (angle < -epsilon || angle < epsilon && sum < -epsilon2) ^ winding & 1;
 	}
 
-	function d3_polygonHull(points) {
-	  if ((n = points.length) < 3) { return null; }
+	function clip (pointVisible, clipLine, interpolate, start) {
+	  return function (sink) {
+	    var line = clipLine(sink),
+	        ringBuffer = clipBuffer(),
+	        ringSink = clipLine(ringBuffer),
+	        polygonStarted = false,
+	        polygon,
+	        segments,
+	        ring;
+	    var clip = {
+	      point: point,
+	      lineStart: lineStart,
+	      lineEnd: lineEnd,
+	      polygonStart: function polygonStart() {
+	        clip.point = pointRing;
+	        clip.lineStart = ringStart;
+	        clip.lineEnd = ringEnd;
+	        segments = [];
+	        polygon = [];
+	      },
+	      polygonEnd: function polygonEnd() {
+	        clip.point = point;
+	        clip.lineStart = lineStart;
+	        clip.lineEnd = lineEnd;
+	        segments = merge(segments);
+	        var startInside = polygonContains(polygon, start);
+
+	        if (segments.length) {
+	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+	          clipRejoin(segments, compareIntersection, startInside, interpolate, sink);
+	        } else if (startInside) {
+	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+	          sink.lineStart();
+	          interpolate(null, null, 1, sink);
+	          sink.lineEnd();
+	        }
 
-	  var i,
-	      n,
-	      sortedPoints = new Array(n),
-	      flippedPoints = new Array(n);
+	        if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
+	        segments = polygon = null;
+	      },
+	      sphere: function sphere() {
+	        sink.polygonStart();
+	        sink.lineStart();
+	        interpolate(null, null, 1, sink);
+	        sink.lineEnd();
+	        sink.polygonEnd();
+	      }
+	    };
 
-	  for (i = 0; i < n; ++i) { sortedPoints[i] = [+points[i][0], +points[i][1], i]; }
-	  sortedPoints.sort(lexicographicOrder);
-	  for (i = 0; i < n; ++i) { flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]]; }
+	    function point(lambda, phi) {
+	      if (pointVisible(lambda, phi)) sink.point(lambda, phi);
+	    }
 
-	  var upperIndexes = computeUpperHullIndexes(sortedPoints),
-	      lowerIndexes = computeUpperHullIndexes(flippedPoints);
+	    function pointLine(lambda, phi) {
+	      line.point(lambda, phi);
+	    }
 
-	  // Construct the hull polygon, removing possible duplicate endpoints.
-	  var skipLeft = lowerIndexes[0] === upperIndexes[0],
-	      skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
-	      hull = [];
+	    function lineStart() {
+	      clip.point = pointLine;
+	      line.lineStart();
+	    }
 
-	  // Add upper hull in right-to-l order.
-	  // Then add lower hull in left-to-right order.
-	  for (i = upperIndexes.length - 1; i >= 0; --i) { hull.push(points[sortedPoints[upperIndexes[i]][2]]); }
-	  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) { hull.push(points[sortedPoints[lowerIndexes[i]][2]]); }
+	    function lineEnd() {
+	      clip.point = point;
+	      line.lineEnd();
+	    }
 
-	  return hull;
-	}
+	    function pointRing(lambda, phi) {
+	      ring.push([lambda, phi]);
+	      ringSink.point(lambda, phi);
+	    }
 
-	// vector equals
-	function geoVecEqual(a, b, epsilon) {
-	    if (epsilon) {
-	        return (Math.abs(a[0] - b[0]) <= epsilon) && (Math.abs(a[1] - b[1]) <= epsilon);
-	    } else {
-	        return (a[0] === b[0]) && (a[1] === b[1]);
+	    function ringStart() {
+	      ringSink.lineStart();
+	      ring = [];
 	    }
-	}
 
-	// vector addition
-	function geoVecAdd(a, b) {
-	    return [ a[0] + b[0], a[1] + b[1] ];
-	}
+	    function ringEnd() {
+	      pointRing(ring[0][0], ring[0][1]);
+	      ringSink.lineEnd();
+	      var clean = ringSink.clean(),
+	          ringSegments = ringBuffer.result(),
+	          i,
+	          n = ringSegments.length,
+	          m,
+	          segment,
+	          point;
+	      ring.pop();
+	      polygon.push(ring);
+	      ring = null;
+	      if (!n) return; // No intersections.
 
-	// vector subtraction
-	function geoVecSubtract(a, b) {
-	    return [ a[0] - b[0], a[1] - b[1] ];
-	}
+	      if (clean & 1) {
+	        segment = ringSegments[0];
 
-	// vector scaling
-	function geoVecScale(a, mag) {
-	    return [ a[0] * mag, a[1] * mag ];
-	}
+	        if ((m = segment.length - 1) > 0) {
+	          if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+	          sink.lineStart();
 
-	// vector rounding (was: geoRoundCoordinates)
-	function geoVecFloor(a) {
-	    return [ Math.floor(a[0]), Math.floor(a[1]) ];
-	}
+	          for (i = 0; i < m; ++i) {
+	            sink.point((point = segment[i])[0], point[1]);
+	          }
 
-	// linear interpolation
-	function geoVecInterp(a, b, t) {
-	    return [
-	        a[0] + (b[0] - a[0]) * t,
-	        a[1] + (b[1] - a[1]) * t
-	    ];
-	}
+	          sink.lineEnd();
+	        }
 
-	// http://jsperf.com/id-dist-optimization
-	function geoVecLength(a, b) {
-	    return Math.sqrt(geoVecLengthSquare(a,b));
-	}
+	        return;
+	      } // Rejoin connected segments.
+	      // TODO reuse ringBuffer.rejoin()?
 
-	// length of vector raised to the power two
-	function geoVecLengthSquare(a, b) {
-	    b = b || [0, 0];
-	    var x = a[0] - b[0];
-	    var y = a[1] - b[1];
-	    return (x * x) + (y * y);
-	}
 
-	// get a unit vector
-	function geoVecNormalize(a) {
-	    var length = Math.sqrt((a[0] * a[0]) + (a[1] * a[1]));
-	    if (length !== 0) {
-	        return geoVecScale(a, 1 / length);
+	      if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
+	      segments.push(ringSegments.filter(validSegment));
 	    }
-	    return [0, 0];
-	}
 
-	// Return the counterclockwise angle in the range (-pi, pi)
-	// between the positive X axis and the line intersecting a and b.
-	function geoVecAngle(a, b) {
-	    return Math.atan2(b[1] - a[1], b[0] - a[0]);
+	    return clip;
+	  };
 	}
 
-	// dot product
-	function geoVecDot(a, b, origin) {
-	    origin = origin || [0, 0];
-	    var p = geoVecSubtract(a, origin);
-	    var q = geoVecSubtract(b, origin);
-	    return (p[0]) * (q[0]) + (p[1]) * (q[1]);
-	}
+	function validSegment(segment) {
+	  return segment.length > 1;
+	} // Intersections are sorted along the clip edge. For both antimeridian cutting
+	// and circle clipping, the same comparison is used.
 
-	// normalized dot product
-	function geoVecNormalizedDot(a, b, origin) {
-	    origin = origin || [0, 0];
-	    var p = geoVecNormalize(geoVecSubtract(a, origin));
-	    var q = geoVecNormalize(geoVecSubtract(b, origin));
-	    return geoVecDot(p, q);
-	}
 
-	// 2D cross product of OA and OB vectors, returns magnitude of Z vector
-	// Returns a positive value, if OAB makes a counter-clockwise turn,
-	// negative for clockwise turn, and zero if the points are collinear.
-	function geoVecCross(a, b, origin) {
-	    origin = origin || [0, 0];
-	    var p = geoVecSubtract(a, origin);
-	    var q = geoVecSubtract(b, origin);
-	    return (p[0]) * (q[1]) - (p[1]) * (q[0]);
+	function compareIntersection(a, b) {
+	  return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon : halfPi - a[1]) - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon : halfPi - b[1]);
 	}
 
+	var clipAntimeridian = clip(function () {
+	  return true;
+	}, clipAntimeridianLine, clipAntimeridianInterpolate, [-pi, -halfPi]); // Takes a line and cuts into visible segments. Return values: 0 - there were
+	// intersections or the line was empty; 1 - no intersections; 2 - there were
+	// intersections, and the first and last segments should be rejoined.
 
-	// find closest orthogonal projection of point onto points array
-	function geoVecProject(a, points) {
-	    var min = Infinity;
-	    var idx;
-	    var target;
-
-	    for (var i = 0; i < points.length - 1; i++) {
-	        var o = points[i];
-	        var s = geoVecSubtract(points[i + 1], o);
-	        var v = geoVecSubtract(a, o);
-	        var proj = geoVecDot(v, s) / geoVecDot(s, s);
-	        var p;
-
-	        if (proj < 0) {
-	            p = o;
-	        } else if (proj > 1) {
-	            p = points[i + 1];
-	        } else {
-	            p = [o[0] + proj * s[0], o[1] + proj * s[1]];
-	        }
+	function clipAntimeridianLine(stream) {
+	  var lambda0 = NaN,
+	      phi0 = NaN,
+	      sign0 = NaN,
+	      _clean; // no intersections
 
-	        var dist = geoVecLength(p, a);
-	        if (dist < min) {
-	            min = dist;
-	            idx = i + 1;
-	            target = p;
-	        }
-	    }
 
-	    if (idx !== undefined) {
-	        return { index: idx, distance: min, target: target };
-	    } else {
-	        return null;
+	  return {
+	    lineStart: function lineStart() {
+	      stream.lineStart();
+	      _clean = 1;
+	    },
+	    point: function point(lambda1, phi1) {
+	      var sign1 = lambda1 > 0 ? pi : -pi,
+	          delta = abs$2(lambda1 - lambda0);
+
+	      if (abs$2(delta - pi) < epsilon) {
+	        // line crosses a pole
+	        stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi : -halfPi);
+	        stream.point(sign0, phi0);
+	        stream.lineEnd();
+	        stream.lineStart();
+	        stream.point(sign1, phi0);
+	        stream.point(lambda1, phi0);
+	        _clean = 0;
+	      } else if (sign0 !== sign1 && delta >= pi) {
+	        // line crosses antimeridian
+	        if (abs$2(lambda0 - sign0) < epsilon) lambda0 -= sign0 * epsilon; // handle degeneracies
+
+	        if (abs$2(lambda1 - sign1) < epsilon) lambda1 -= sign1 * epsilon;
+	        phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
+	        stream.point(sign0, phi0);
+	        stream.lineEnd();
+	        stream.lineStart();
+	        stream.point(sign1, phi0);
+	        _clean = 0;
+	      }
+
+	      stream.point(lambda0 = lambda1, phi0 = phi1);
+	      sign0 = sign1;
+	    },
+	    lineEnd: function lineEnd() {
+	      stream.lineEnd();
+	      lambda0 = phi0 = NaN;
+	    },
+	    clean: function clean() {
+	      return 2 - _clean; // if intersections, rejoin first and last segments
 	    }
+	  };
 	}
 
-	// Return the counterclockwise angle in the range (-pi, pi)
-	// between the positive X axis and the line intersecting a and b.
-	function geoAngle(a, b, projection) {
-	    return geoVecAngle(projection(a.loc), projection(b.loc));
+	function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
+	  var cosPhi0,
+	      cosPhi1,
+	      sinLambda0Lambda1 = sin(lambda0 - lambda1);
+	  return abs$2(sinLambda0Lambda1) > epsilon ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1) - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0)) / (cosPhi0 * cosPhi1 * sinLambda0Lambda1)) : (phi0 + phi1) / 2;
 	}
 
+	function clipAntimeridianInterpolate(from, to, direction, stream) {
+	  var phi;
 
-	function geoEdgeEqual(a, b) {
-	    return (a[0] === b[0] && a[1] === b[1]) ||
-	        (a[0] === b[1] && a[1] === b[0]);
+	  if (from == null) {
+	    phi = direction * halfPi;
+	    stream.point(-pi, phi);
+	    stream.point(0, phi);
+	    stream.point(pi, phi);
+	    stream.point(pi, 0);
+	    stream.point(pi, -phi);
+	    stream.point(0, -phi);
+	    stream.point(-pi, -phi);
+	    stream.point(-pi, 0);
+	    stream.point(-pi, phi);
+	  } else if (abs$2(from[0] - to[0]) > epsilon) {
+	    var lambda = from[0] < to[0] ? pi : -pi;
+	    phi = direction * lambda / 2;
+	    stream.point(-lambda, phi);
+	    stream.point(0, phi);
+	    stream.point(lambda, phi);
+	  } else {
+	    stream.point(to[0], to[1]);
+	  }
 	}
 
+	function clipCircle (radius) {
+	  var cr = cos(radius),
+	      delta = 6 * radians,
+	      smallRadius = cr > 0,
+	      notHemisphere = abs$2(cr) > epsilon; // TODO optimise for this common case
 
-	// Rotate all points counterclockwise around a pivot point by given angle
-	function geoRotate(points, angle, around) {
-	    return points.map(function(point) {
-	        var radial = geoVecSubtract(point, around);
-	        return [
-	            radial[0] * Math.cos(angle) - radial[1] * Math.sin(angle) + around[0],
-	            radial[0] * Math.sin(angle) + radial[1] * Math.cos(angle) + around[1]
-	        ];
-	    });
-	}
+	  function interpolate(from, to, direction, stream) {
+	    circleStream(stream, radius, delta, direction, from, to);
+	  }
 
+	  function visible(lambda, phi) {
+	    return cos(lambda) * cos(phi) > cr;
+	  } // Takes a line and cuts into visible segments. Return values used for polygon
+	  // clipping: 0 - there were intersections or the line was empty; 1 - no
+	  // intersections 2 - there were intersections, and the first and last segments
+	  // should be rejoined.
 
-	// Choose the edge with the minimal distance from `point` to its orthogonal
-	// projection onto that edge, if such a projection exists, or the distance to
-	// the closest vertex on that edge. Returns an object with the `index` of the
-	// chosen edge, the chosen `loc` on that edge, and the `distance` to to it.
-	function geoChooseEdge(nodes, point, projection, activeID) {
-	    var dist = geoVecLength;
-	    var points = nodes.map(function(n) { return projection(n.loc); });
-	    var ids = nodes.map(function(n) { return n.id; });
-	    var min = Infinity;
-	    var idx;
-	    var loc;
-
-	    for (var i = 0; i < points.length - 1; i++) {
-	        if (ids[i] === activeID || ids[i + 1] === activeID) { continue; }
-
-	        var o = points[i];
-	        var s = geoVecSubtract(points[i + 1], o);
-	        var v = geoVecSubtract(point, o);
-	        var proj = geoVecDot(v, s) / geoVecDot(s, s);
-	        var p;
-
-	        if (proj < 0) {
-	            p = o;
-	        } else if (proj > 1) {
-	            p = points[i + 1];
-	        } else {
-	            p = [o[0] + proj * s[0], o[1] + proj * s[1]];
-	        }
 
-	        var d = dist(p, point);
-	        if (d < min) {
-	            min = d;
-	            idx = i + 1;
-	            loc = projection.invert(p);
-	        }
-	    }
+	  function clipLine(stream) {
+	    var point0, // previous point
+	    c0, // code for previous point
+	    v0, // visibility of previous point
+	    v00, // visibility of first point
+	    _clean; // no intersections
 
-	    if (idx !== undefined) {
-	        return { index: idx, distance: min, loc: loc };
-	    } else {
-	        return null;
-	    }
-	}
 
+	    return {
+	      lineStart: function lineStart() {
+	        v00 = v0 = false;
+	        _clean = 1;
+	      },
+	      point: function point(lambda, phi) {
+	        var point1 = [lambda, phi],
+	            point2,
+	            v = visible(lambda, phi),
+	            c = smallRadius ? v ? 0 : code(lambda, phi) : v ? code(lambda + (lambda < 0 ? pi : -pi), phi) : 0;
+	        if (!point0 && (v00 = v0 = v)) stream.lineStart();
 
-	// Test active (dragged or drawing) segments against inactive segments
-	// This is used to test e.g. multipolygon rings that cross
-	// `activeNodes` is the ring containing the activeID being dragged.
-	// `inactiveNodes` is the other ring to test against
-	function geoHasLineIntersections(activeNodes, inactiveNodes, activeID) {
-	    var actives = [];
-	    var inactives = [];
-	    var j, k, n1, n2, segment;
-
-	    // gather active segments (only segments in activeNodes that contain the activeID)
-	    for (j = 0; j < activeNodes.length - 1; j++) {
-	        n1 = activeNodes[j];
-	        n2 = activeNodes[j+1];
-	        segment = [n1.loc, n2.loc];
-	        if (n1.id === activeID || n2.id === activeID) {
-	            actives.push(segment);
-	        }
-	    }
-
-	    // gather inactive segments
-	    for (j = 0; j < inactiveNodes.length - 1; j++) {
-	        n1 = inactiveNodes[j];
-	        n2 = inactiveNodes[j+1];
-	        segment = [n1.loc, n2.loc];
-	        inactives.push(segment);
-	    }
-
-	    // test
-	    for (j = 0; j < actives.length; j++) {
-	        for (k = 0; k < inactives.length; k++) {
-	            var p = actives[j];
-	            var q = inactives[k];
-	            var hit = geoLineIntersection(p, q);
-	            if (hit) {
-	                return true;
-	            }
+	        if (v !== v0) {
+	          point2 = intersect(point0, point1);
+	          if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2)) point1[2] = 1;
 	        }
-	    }
 
-	    return false;
-	}
+	        if (v !== v0) {
+	          _clean = 0;
 
+	          if (v) {
+	            // outside going in
+	            stream.lineStart();
+	            point2 = intersect(point1, point0);
+	            stream.point(point2[0], point2[1]);
+	          } else {
+	            // inside going out
+	            point2 = intersect(point0, point1);
+	            stream.point(point2[0], point2[1], 2);
+	            stream.lineEnd();
+	          }
 
-	// Test active (dragged or drawing) segments against inactive segments
-	// This is used to test whether a way intersects with itself.
-	function geoHasSelfIntersections(nodes, activeID) {
-	    var actives = [];
-	    var inactives = [];
-	    var j, k;
-
-	    // group active and passive segments along the nodes
-	    for (j = 0; j < nodes.length - 1; j++) {
-	        var n1 = nodes[j];
-	        var n2 = nodes[j+1];
-	        var segment = [n1.loc, n2.loc];
-	        if (n1.id === activeID || n2.id === activeID) {
-	            actives.push(segment);
-	        } else {
-	            inactives.push(segment);
-	        }
-	    }
+	          point0 = point2;
+	        } else if (notHemisphere && point0 && smallRadius ^ v) {
+	          var t; // If the codes for two points are different, or are both zero,
+	          // and there this segment intersects with the small circle.
 
-	    // test
-	    for (j = 0; j < actives.length; j++) {
-	        for (k = 0; k < inactives.length; k++) {
-	            var p = actives[j];
-	            var q = inactives[k];
-	            // skip if segments share an endpoint
-	            if (geoVecEqual(p[1], q[0]) || geoVecEqual(p[0], q[1]) ||
-	                geoVecEqual(p[0], q[0]) || geoVecEqual(p[1], q[1]) ) {
-	                continue;
-	            }
+	          if (!(c & c0) && (t = intersect(point1, point0, true))) {
+	            _clean = 0;
 
-	            var hit = geoLineIntersection(p, q);
-	            if (hit) {
-	                var epsilon = 1e-8;
-	                // skip if the hit is at the segment's endpoint
-	                if (geoVecEqual(p[1], hit, epsilon) || geoVecEqual(p[0], hit, epsilon) ||
-	                    geoVecEqual(q[1], hit, epsilon) || geoVecEqual(q[0], hit, epsilon) ) {
-	                    continue;
-	                } else {
-	                    return true;
-	                }
+	            if (smallRadius) {
+	              stream.lineStart();
+	              stream.point(t[0][0], t[0][1]);
+	              stream.point(t[1][0], t[1][1]);
+	              stream.lineEnd();
+	            } else {
+	              stream.point(t[1][0], t[1][1]);
+	              stream.lineEnd();
+	              stream.lineStart();
+	              stream.point(t[0][0], t[0][1], 3);
 	            }
+	          }
 	        }
-	    }
 
-	    return false;
-	}
+	        if (v && (!point0 || !pointEqual(point0, point1))) {
+	          stream.point(point1[0], point1[1]);
+	        }
 
+	        point0 = point1, v0 = v, c0 = c;
+	      },
+	      lineEnd: function lineEnd() {
+	        if (v0) stream.lineEnd();
+	        point0 = null;
+	      },
+	      // Rejoin first and last segments if there were intersections and the first
+	      // and last points were visible.
+	      clean: function clean() {
+	        return _clean | (v00 && v0) << 1;
+	      }
+	    };
+	  } // Intersects the great circle between a and b with the clip circle.
 
-	// Return the intersection point of 2 line segments.
-	// From https://github.com/pgkelley4/line-segments-intersect
-	// This uses the vector cross product approach described below:
-	//  http://stackoverflow.com/a/565282/786339
-	function geoLineIntersection(a, b) {
-	    var p = [a[0][0], a[0][1]];
-	    var p2 = [a[1][0], a[1][1]];
-	    var q = [b[0][0], b[0][1]];
-	    var q2 = [b[1][0], b[1][1]];
-	    var r = geoVecSubtract(p2, p);
-	    var s = geoVecSubtract(q2, q);
-	    var uNumerator = geoVecCross(geoVecSubtract(q, p), r);
-	    var denominator = geoVecCross(r, s);
 
-	    if (uNumerator && denominator) {
-	        var u = uNumerator / denominator;
-	        var t = geoVecCross(geoVecSubtract(q, p), s) / denominator;
+	  function intersect(a, b, two) {
+	    var pa = cartesian(a),
+	        pb = cartesian(b); // We have two planes, n1.p = d1 and n2.p = d2.
+	    // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
 
-	        if ((t >= 0) && (t <= 1) && (u >= 0) && (u <= 1)) {
-	            return geoVecInterp(p, p2, t);
-	        }
-	    }
+	    var n1 = [1, 0, 0],
+	        // normal
+	    n2 = cartesianCross(pa, pb),
+	        n2n2 = cartesianDot(n2, n2),
+	        n1n2 = n2[0],
+	        // cartesianDot(n1, n2),
+	    determinant = n2n2 - n1n2 * n1n2; // Two polar points.
 
-	    return null;
-	}
+	    if (!determinant) return !two && a;
+	    var c1 = cr * n2n2 / determinant,
+	        c2 = -cr * n1n2 / determinant,
+	        n1xn2 = cartesianCross(n1, n2),
+	        A = cartesianScale(n1, c1),
+	        B = cartesianScale(n2, c2);
+	    cartesianAddInPlace(A, B); // Solve |p(t)|^2 = 1.
 
+	    var u = n1xn2,
+	        w = cartesianDot(A, u),
+	        uu = cartesianDot(u, u),
+	        t2 = w * w - uu * (cartesianDot(A, A) - 1);
+	    if (t2 < 0) return;
+	    var t = sqrt$1(t2),
+	        q = cartesianScale(u, (-w - t) / uu);
+	    cartesianAddInPlace(q, A);
+	    q = spherical(q);
+	    if (!two) return q; // Two intersection points.
 
-	function geoPathIntersections(path1, path2) {
-	    var intersections = [];
-	    for (var i = 0; i < path1.length - 1; i++) {
-	        for (var j = 0; j < path2.length - 1; j++) {
-	            var a = [ path1[i], path1[i+1] ];
-	            var b = [ path2[j], path2[j+1] ];
-	            var hit = geoLineIntersection(a, b);
-	            if (hit) {
-	                intersections.push(hit);
-	            }
-	        }
-	    }
-	    return intersections;
-	}
+	    var lambda0 = a[0],
+	        lambda1 = b[0],
+	        phi0 = a[1],
+	        phi1 = b[1],
+	        z;
+	    if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;
+	    var delta = lambda1 - lambda0,
+	        polar = abs$2(delta - pi) < epsilon,
+	        meridian = polar || delta < epsilon;
+	    if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z; // Check that the first point is between a and b.
 
-	function geoPathHasIntersections(path1, path2) {
-	    for (var i = 0; i < path1.length - 1; i++) {
-	        for (var j = 0; j < path2.length - 1; j++) {
-	            var a = [ path1[i], path1[i+1] ];
-	            var b = [ path2[j], path2[j+1] ];
-	            var hit = geoLineIntersection(a, b);
-	            if (hit) {
-	                return true;
-	            }
-	        }
+	    if (meridian ? polar ? phi0 + phi1 > 0 ^ q[1] < (abs$2(q[0] - lambda0) < epsilon ? phi0 : phi1) : phi0 <= q[1] && q[1] <= phi1 : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
+	      var q1 = cartesianScale(u, (-w + t) / uu);
+	      cartesianAddInPlace(q1, A);
+	      return [q, spherical(q1)];
 	    }
-	    return false;
-	}
+	  } // Generates a 4-bit vector representing the location of a point relative to
+	  // the small circle's bounding box.
 
 
-	// Return whether point is contained in polygon.
-	//
-	// `point` should be a 2-item array of coordinates.
-	// `polygon` should be an array of 2-item arrays of coordinates.
-	//
-	// From https://github.com/substack/point-in-polygon.
-	// ray-casting algorithm based on
-	// http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
-	//
-	function geoPointInPolygon(point, polygon) {
-	    var x = point[0];
-	    var y = point[1];
-	    var inside = false;
+	  function code(lambda, phi) {
+	    var r = smallRadius ? radius : pi - radius,
+	        code = 0;
+	    if (lambda < -r) code |= 1; // left
+	    else if (lambda > r) code |= 2; // right
 
-	    for (var i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
-	        var xi = polygon[i][0];
-	        var yi = polygon[i][1];
-	        var xj = polygon[j][0];
-	        var yj = polygon[j][1];
+	    if (phi < -r) code |= 4; // below
+	    else if (phi > r) code |= 8; // above
 
-	        var intersect = ((yi > y) !== (yj > y)) &&
-	            (x < (xj - xi) * (y - yi) / (yj - yi) + xi);
-	        if (intersect) { inside = !inside; }
-	    }
+	    return code;
+	  }
 
-	    return inside;
+	  return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi, radius - pi]);
 	}
 
+	function clipLine (a, b, x0, y0, x1, y1) {
+	  var ax = a[0],
+	      ay = a[1],
+	      bx = b[0],
+	      by = b[1],
+	      t0 = 0,
+	      t1 = 1,
+	      dx = bx - ax,
+	      dy = by - ay,
+	      r;
+	  r = x0 - ax;
+	  if (!dx && r > 0) return;
+	  r /= dx;
 
-	function geoPolygonContainsPolygon(outer, inner) {
-	    return inner.every(function(point) {
-	        return geoPointInPolygon(point, outer);
-	    });
-	}
+	  if (dx < 0) {
+	    if (r < t0) return;
+	    if (r < t1) t1 = r;
+	  } else if (dx > 0) {
+	    if (r > t1) return;
+	    if (r > t0) t0 = r;
+	  }
 
+	  r = x1 - ax;
+	  if (!dx && r < 0) return;
+	  r /= dx;
 
-	function geoPolygonIntersectsPolygon(outer, inner, checkSegments) {
-	    function testPoints(outer, inner) {
-	        return inner.some(function(point) {
-	            return geoPointInPolygon(point, outer);
-	        });
-	    }
+	  if (dx < 0) {
+	    if (r > t1) return;
+	    if (r > t0) t0 = r;
+	  } else if (dx > 0) {
+	    if (r < t0) return;
+	    if (r < t1) t1 = r;
+	  }
 
-	   return testPoints(outer, inner) || (!!checkSegments && geoPathHasIntersections(outer, inner));
-	}
+	  r = y0 - ay;
+	  if (!dy && r > 0) return;
+	  r /= dy;
 
+	  if (dy < 0) {
+	    if (r < t0) return;
+	    if (r < t1) t1 = r;
+	  } else if (dy > 0) {
+	    if (r > t1) return;
+	    if (r > t0) t0 = r;
+	  }
 
-	// http://gis.stackexchange.com/questions/22895/finding-minimum-area-rectangle-for-given-points
-	// http://gis.stackexchange.com/questions/3739/generalisation-strategies-for-building-outlines/3756#3756
-	function geoGetSmallestSurroundingRectangle(points) {
-	    var hull = d3_polygonHull(points);
-	    var centroid = d3_polygonCentroid(hull);
-	    var minArea = Infinity;
-	    var ssrExtent = [];
-	    var ssrAngle = 0;
-	    var c1 = hull[0];
-
-	    for (var i = 0; i <= hull.length - 1; i++) {
-	        var c2 = (i === hull.length - 1) ? hull[0] : hull[i + 1];
-	        var angle = Math.atan2(c2[1] - c1[1], c2[0] - c1[0]);
-	        var poly = geoRotate(hull, -angle, centroid);
-	        var extent = poly.reduce(function(extent, point) {
-	            return extent.extend(geoExtent(point));
-	        }, geoExtent());
-
-	        var area = extent.area();
-	        if (area < minArea) {
-	            minArea = area;
-	            ssrExtent = extent;
-	            ssrAngle = angle;
-	        }
-	        c1 = c2;
-	    }
+	  r = y1 - ay;
+	  if (!dy && r < 0) return;
+	  r /= dy;
 
-	    return {
-	        poly: geoRotate(ssrExtent.polygon(), ssrAngle, centroid),
-	        angle: ssrAngle
-	    };
+	  if (dy < 0) {
+	    if (r > t1) return;
+	    if (r > t0) t0 = r;
+	  } else if (dy > 0) {
+	    if (r < t0) return;
+	    if (r < t1) t1 = r;
+	  }
+
+	  if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
+	  if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
+	  return true;
 	}
 
+	var clipMax = 1e9,
+	    clipMin = -clipMax; // TODO Use d3-polygon’s polygonContains here for the ring check?
+	// TODO Eliminate duplicate buffering in clipBuffer and polygon.push?
 
-	function geoPathLength(path) {
-	    var length = 0;
-	    for (var i = 0; i < path.length - 1; i++) {
-	        length += geoVecLength(path[i], path[i + 1]);
-	    }
-	    return length;
-	}
+	function clipRectangle(x0, y0, x1, y1) {
+	  function visible(x, y) {
+	    return x0 <= x && x <= x1 && y0 <= y && y <= y1;
+	  }
 
+	  function interpolate(from, to, direction, stream) {
+	    var a = 0,
+	        a1 = 0;
 
-	// If the given point is at the edge of the padded viewport,
-	// return a vector that will nudge the viewport in that direction
-	function geoViewportEdge(point, dimensions) {
-	    var pad = [80, 20, 50, 20];   // top, right, bottom, left
-	    var x = 0;
-	    var y = 0;
-
-	    if (point[0] > dimensions[0] - pad[1])
-	        { x = -10; }
-	    if (point[0] < pad[3])
-	        { x = 10; }
-	    if (point[1] > dimensions[1] - pad[2])
-	        { y = -10; }
-	    if (point[1] < pad[0])
-	        { y = 10; }
-
-	    if (x || y) {
-	        return [x, y];
+	    if (from == null || (a = corner(from, direction)) !== (a1 = corner(to, direction)) || comparePoint(from, to) < 0 ^ direction > 0) {
+	      do {
+	        stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
+	      } while ((a = (a + direction + 4) % 4) !== a1);
 	    } else {
-	        return null;
+	      stream.point(to[0], to[1]);
 	    }
-	}
-
-	var noop$3 = {value: function() {}};
-
-	function dispatch() {
-	  var arguments$1 = arguments;
+	  }
 
-	  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
-	    if (!(t = arguments$1[i] + "") || (t in _) || /[\s.]/.test(t)) { throw new Error("illegal type: " + t); }
-	    _[t] = [];
+	  function corner(p, direction) {
+	    return abs$2(p[0] - x0) < epsilon ? direction > 0 ? 0 : 3 : abs$2(p[0] - x1) < epsilon ? direction > 0 ? 2 : 1 : abs$2(p[1] - y0) < epsilon ? direction > 0 ? 1 : 0 : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
 	  }
-	  return new Dispatch(_);
-	}
 
-	function Dispatch(_) {
-	  this._ = _;
-	}
+	  function compareIntersection(a, b) {
+	    return comparePoint(a.x, b.x);
+	  }
 
-	function parseTypenames(typenames, types) {
-	  return typenames.trim().split(/^|\s+/).map(function(t) {
-	    var name = "", i = t.indexOf(".");
-	    if (i >= 0) { name = t.slice(i + 1), t = t.slice(0, i); }
-	    if (t && !types.hasOwnProperty(t)) { throw new Error("unknown type: " + t); }
-	    return {type: t, name: name};
-	  });
-	}
+	  function comparePoint(a, b) {
+	    var ca = corner(a, 1),
+	        cb = corner(b, 1);
+	    return ca !== cb ? ca - cb : ca === 0 ? b[1] - a[1] : ca === 1 ? a[0] - b[0] : ca === 2 ? a[1] - b[1] : b[0] - a[0];
+	  }
 
-	Dispatch.prototype = dispatch.prototype = {
-	  constructor: Dispatch,
-	  on: function(typename, callback) {
-	    var _ = this._,
-	        T = parseTypenames(typename + "", _),
-	        t,
-	        i = -1,
-	        n = T.length;
+	  return function (stream) {
+	    var activeStream = stream,
+	        bufferStream = clipBuffer(),
+	        segments,
+	        polygon,
+	        ring,
+	        x__,
+	        y__,
+	        v__,
+	        // first point
+	    x_,
+	        y_,
+	        v_,
+	        // previous point
+	    first,
+	        clean;
+	    var clipStream = {
+	      point: point,
+	      lineStart: lineStart,
+	      lineEnd: lineEnd,
+	      polygonStart: polygonStart,
+	      polygonEnd: polygonEnd
+	    };
 
-	    // If no callback was specified, return the callback of the given type and name.
-	    if (arguments.length < 2) {
-	      while (++i < n) { if ((t = (typename = T[i]).type) && (t = get$1(_[t], typename.name))) { return t; } }
-	      return;
+	    function point(x, y) {
+	      if (visible(x, y)) activeStream.point(x, y);
 	    }
 
-	    // If a type was specified, set the callback for the given type and name.
-	    // Otherwise, if a null callback was specified, remove callbacks of the given name.
-	    if (callback != null && typeof callback !== "function") { throw new Error("invalid callback: " + callback); }
-	    while (++i < n) {
-	      if (t = (typename = T[i]).type) { _[t] = set(_[t], typename.name, callback); }
-	      else if (callback == null) { for (t in _) { _[t] = set(_[t], typename.name, null); } }
-	    }
+	    function polygonInside() {
+	      var winding = 0;
 
-	    return this;
-	  },
-	  copy: function() {
-	    var copy = {}, _ = this._;
-	    for (var t in _) { copy[t] = _[t].slice(); }
-	    return new Dispatch(copy);
-	  },
-	  call: function(type, that) {
-	    var arguments$1 = arguments;
+	      for (var i = 0, n = polygon.length; i < n; ++i) {
+	        for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
+	          a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
 
-	    if ((n = arguments.length - 2) > 0) { for (var args = new Array(n), i = 0, n, t; i < n; ++i) { args[i] = arguments$1[i + 2]; } }
-	    if (!this._.hasOwnProperty(type)) { throw new Error("unknown type: " + type); }
-	    for (t = this._[type], i = 0, n = t.length; i < n; ++i) { t[i].value.apply(that, args); }
-	  },
-	  apply: function(type, that, args) {
-	    if (!this._.hasOwnProperty(type)) { throw new Error("unknown type: " + type); }
-	    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) { t[i].value.apply(that, args); }
-	  }
-	};
+	          if (a1 <= y1) {
+	            if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding;
+	          } else {
+	            if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding;
+	          }
+	        }
+	      }
 
-	function get$1(type, name) {
-	  for (var i = 0, n = type.length, c; i < n; ++i) {
-	    if ((c = type[i]).name === name) {
-	      return c.value;
-	    }
-	  }
-	}
+	      return winding;
+	    } // Buffer geometry within a polygon and then clip it en masse.
 
-	function set(type, name, callback) {
-	  for (var i = 0, n = type.length; i < n; ++i) {
-	    if (type[i].name === name) {
-	      type[i] = noop$3, type = type.slice(0, i).concat(type.slice(i + 1));
-	      break;
-	    }
-	  }
-	  if (callback != null) { type.push({name: name, value: callback}); }
-	  return type;
-	}
 
-	var xhtml = "http://www.w3.org/1999/xhtml";
+	    function polygonStart() {
+	      activeStream = bufferStream, segments = [], polygon = [], clean = true;
+	    }
 
-	var namespaces = {
-	  svg: "http://www.w3.org/2000/svg",
-	  xhtml: xhtml,
-	  xlink: "http://www.w3.org/1999/xlink",
-	  xml: "http://www.w3.org/XML/1998/namespace",
-	  xmlns: "http://www.w3.org/2000/xmlns/"
-	};
+	    function polygonEnd() {
+	      var startInside = polygonInside(),
+	          cleanInside = clean && startInside,
+	          visible = (segments = merge(segments)).length;
 
-	function namespace(name) {
-	  var prefix = name += "", i = prefix.indexOf(":");
-	  if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") { name = name.slice(i + 1); }
-	  return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;
-	}
+	      if (cleanInside || visible) {
+	        stream.polygonStart();
 
-	function creatorInherit(name) {
-	  return function() {
-	    var document = this.ownerDocument,
-	        uri = this.namespaceURI;
-	    return uri === xhtml && document.documentElement.namespaceURI === xhtml
-	        ? document.createElement(name)
-	        : document.createElementNS(uri, name);
-	  };
-	}
+	        if (cleanInside) {
+	          stream.lineStart();
+	          interpolate(null, null, 1, stream);
+	          stream.lineEnd();
+	        }
 
-	function creatorFixed(fullname) {
-	  return function() {
-	    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
-	  };
-	}
+	        if (visible) {
+	          clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
+	        }
 
-	function creator(name) {
-	  var fullname = namespace(name);
-	  return (fullname.local
-	      ? creatorFixed
-	      : creatorInherit)(fullname);
-	}
+	        stream.polygonEnd();
+	      }
 
-	function none() {}
+	      activeStream = stream, segments = polygon = ring = null;
+	    }
 
-	function selector(selector) {
-	  return selector == null ? none : function() {
-	    return this.querySelector(selector);
-	  };
-	}
+	    function lineStart() {
+	      clipStream.point = linePoint;
+	      if (polygon) polygon.push(ring = []);
+	      first = true;
+	      v_ = false;
+	      x_ = y_ = NaN;
+	    } // TODO rather than special-case polygons, simply handle them separately.
+	    // Ideally, coincident intersection points should be jittered to avoid
+	    // clipping issues.
 
-	function selection_select(select) {
-	  if (typeof select !== "function") { select = selector(select); }
 
-	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
-	        if ("__data__" in node) { subnode.__data__ = node.__data__; }
-	        subgroup[i] = subnode;
+	    function lineEnd() {
+	      if (segments) {
+	        linePoint(x__, y__);
+	        if (v__ && v_) bufferStream.rejoin();
+	        segments.push(bufferStream.result());
 	      }
+
+	      clipStream.point = point;
+	      if (v_) activeStream.lineEnd();
 	    }
-	  }
 
-	  return new Selection(subgroups, this._parents);
-	}
+	    function linePoint(x, y) {
+	      var v = visible(x, y);
+	      if (polygon) ring.push([x, y]);
 
-	function empty() {
-	  return [];
-	}
+	      if (first) {
+	        x__ = x, y__ = y, v__ = v;
+	        first = false;
 
-	function selectorAll(selector) {
-	  return selector == null ? empty : function() {
-	    return this.querySelectorAll(selector);
-	  };
-	}
+	        if (v) {
+	          activeStream.lineStart();
+	          activeStream.point(x, y);
+	        }
+	      } else {
+	        if (v && v_) activeStream.point(x, y);else {
+	          var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
+	              b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
 
-	function selection_selectAll(select) {
-	  if (typeof select !== "function") { select = selectorAll(select); }
+	          if (clipLine(a, b, x0, y0, x1, y1)) {
+	            if (!v_) {
+	              activeStream.lineStart();
+	              activeStream.point(a[0], a[1]);
+	            }
 
-	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        subgroups.push(select.call(node, node.__data__, i, group));
-	        parents.push(node);
+	            activeStream.point(b[0], b[1]);
+	            if (!v) activeStream.lineEnd();
+	            clean = false;
+	          } else if (v) {
+	            activeStream.lineStart();
+	            activeStream.point(x, y);
+	            clean = false;
+	          }
+	        }
 	      }
-	    }
-	  }
 
-	  return new Selection(subgroups, parents);
-	}
+	      x_ = x, y_ = y, v_ = v;
+	    }
 
-	function matcher(selector) {
-	  return function() {
-	    return this.matches(selector);
+	    return clipStream;
 	  };
 	}
 
-	function selection_filter(match) {
-	  if (typeof match !== "function") { match = matcher(match); }
-
-	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
-	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
-	        subgroup.push(node);
-	      }
-	    }
-	  }
+	var lengthSum, lambda0$2, sinPhi0$1, cosPhi0$1;
+	var lengthStream = {
+	  sphere: noop,
+	  point: noop,
+	  lineStart: lengthLineStart,
+	  lineEnd: noop,
+	  polygonStart: noop,
+	  polygonEnd: noop
+	};
 
-	  return new Selection(subgroups, this._parents);
+	function lengthLineStart() {
+	  lengthStream.point = lengthPointFirst;
+	  lengthStream.lineEnd = lengthLineEnd;
 	}
 
-	function sparse(update) {
-	  return new Array(update.length);
+	function lengthLineEnd() {
+	  lengthStream.point = lengthStream.lineEnd = noop;
 	}
 
-	function selection_enter() {
-	  return new Selection(this._enter || this._groups.map(sparse), this._parents);
+	function lengthPointFirst(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  lambda0$2 = lambda, sinPhi0$1 = sin(phi), cosPhi0$1 = cos(phi);
+	  lengthStream.point = lengthPoint;
 	}
 
-	function EnterNode(parent, datum) {
-	  this.ownerDocument = parent.ownerDocument;
-	  this.namespaceURI = parent.namespaceURI;
-	  this._next = null;
-	  this._parent = parent;
-	  this.__data__ = datum;
+	function lengthPoint(lambda, phi) {
+	  lambda *= radians, phi *= radians;
+	  var sinPhi = sin(phi),
+	      cosPhi = cos(phi),
+	      delta = abs$2(lambda - lambda0$2),
+	      cosDelta = cos(delta),
+	      sinDelta = sin(delta),
+	      x = cosPhi * sinDelta,
+	      y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
+	      z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
+	  lengthSum.add(atan2(sqrt$1(x * x + y * y), z));
+	  lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
 	}
 
-	EnterNode.prototype = {
-	  constructor: EnterNode,
-	  appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
-	  insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
-	  querySelector: function(selector) { return this._parent.querySelector(selector); },
-	  querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
-	};
-
-	function constant(x) {
-	  return function() {
-	    return x;
-	  };
+	function d3_geoLength (object) {
+	  lengthSum = new Adder();
+	  d3_geoStream(object, lengthStream);
+	  return +lengthSum;
 	}
 
-	var keyPrefix = "$"; // Protect against keys like “__proto__”.
-
-	function bindIndex(parent, group, enter, update, exit, data) {
-	  var i = 0,
-	      node,
-	      groupLength = group.length,
-	      dataLength = data.length;
+	var identity = (function (x) {
+	  return x;
+	});
 
-	  // Put any non-null nodes that fit into update.
-	  // Put any null nodes into enter.
-	  // Put any remaining data into enter.
-	  for (; i < dataLength; ++i) {
-	    if (node = group[i]) {
-	      node.__data__ = data[i];
-	      update[i] = node;
-	    } else {
-	      enter[i] = new EnterNode(parent, data[i]);
-	    }
+	var areaSum$1 = new Adder(),
+	    areaRingSum$1 = new Adder(),
+	    x00,
+	    y00,
+	    x0$1,
+	    y0$1;
+	var areaStream$1 = {
+	  point: noop,
+	  lineStart: noop,
+	  lineEnd: noop,
+	  polygonStart: function polygonStart() {
+	    areaStream$1.lineStart = areaRingStart$1;
+	    areaStream$1.lineEnd = areaRingEnd$1;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop;
+	    areaSum$1.add(abs$2(areaRingSum$1));
+	    areaRingSum$1 = new Adder();
+	  },
+	  result: function result() {
+	    var area = areaSum$1 / 2;
+	    areaSum$1 = new Adder();
+	    return area;
 	  }
+	};
 
-	  // Put any non-null nodes that don’t fit into exit.
-	  for (; i < groupLength; ++i) {
-	    if (node = group[i]) {
-	      exit[i] = node;
-	    }
-	  }
+	function areaRingStart$1() {
+	  areaStream$1.point = areaPointFirst$1;
 	}
 
-	function bindKey(parent, group, enter, update, exit, data, key) {
-	  var i,
-	      node,
-	      nodeByKeyValue = {},
-	      groupLength = group.length,
-	      dataLength = data.length,
-	      keyValues = new Array(groupLength),
-	      keyValue;
-
-	  // Compute the key for each node.
-	  // If multiple nodes have the same key, the duplicates are added to exit.
-	  for (i = 0; i < groupLength; ++i) {
-	    if (node = group[i]) {
-	      keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
-	      if (keyValue in nodeByKeyValue) {
-	        exit[i] = node;
-	      } else {
-	        nodeByKeyValue[keyValue] = node;
-	      }
-	    }
-	  }
+	function areaPointFirst$1(x, y) {
+	  areaStream$1.point = areaPoint$1;
+	  x00 = x0$1 = x, y00 = y0$1 = y;
+	}
 
-	  // Compute the key for each datum.
-	  // If there a node associated with this key, join and add it to update.
-	  // If there is not (or the key is a duplicate), add it to enter.
-	  for (i = 0; i < dataLength; ++i) {
-	    keyValue = keyPrefix + key.call(parent, data[i], i, data);
-	    if (node = nodeByKeyValue[keyValue]) {
-	      update[i] = node;
-	      node.__data__ = data[i];
-	      nodeByKeyValue[keyValue] = null;
-	    } else {
-	      enter[i] = new EnterNode(parent, data[i]);
-	    }
-	  }
+	function areaPoint$1(x, y) {
+	  areaRingSum$1.add(y0$1 * x - x0$1 * y);
+	  x0$1 = x, y0$1 = y;
+	}
 
-	  // Add any remaining nodes that were not bound to data to exit.
-	  for (i = 0; i < groupLength; ++i) {
-	    if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
-	      exit[i] = node;
-	    }
-	  }
+	function areaRingEnd$1() {
+	  areaPoint$1(x00, y00);
 	}
 
-	function selection_data(value, key) {
-	  if (!value) {
-	    data = new Array(this.size()), j = -1;
-	    this.each(function(d) { data[++j] = d; });
-	    return data;
+	var x0$2 = Infinity,
+	    y0$2 = x0$2,
+	    x1 = -x0$2,
+	    y1 = x1;
+	var boundsStream$1 = {
+	  point: boundsPoint$1,
+	  lineStart: noop,
+	  lineEnd: noop,
+	  polygonStart: noop,
+	  polygonEnd: noop,
+	  result: function result() {
+	    var bounds = [[x0$2, y0$2], [x1, y1]];
+	    x1 = y1 = -(y0$2 = x0$2 = Infinity);
+	    return bounds;
 	  }
+	};
 
-	  var bind = key ? bindKey : bindIndex,
-	      parents = this._parents,
-	      groups = this._groups;
-
-	  if (typeof value !== "function") { value = constant(value); }
-
-	  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
-	    var parent = parents[j],
-	        group = groups[j],
-	        groupLength = group.length,
-	        data = value.call(parent, parent && parent.__data__, j, parents),
-	        dataLength = data.length,
-	        enterGroup = enter[j] = new Array(dataLength),
-	        updateGroup = update[j] = new Array(dataLength),
-	        exitGroup = exit[j] = new Array(groupLength);
-
-	    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);
+	function boundsPoint$1(x, y) {
+	  if (x < x0$2) x0$2 = x;
+	  if (x > x1) x1 = x;
+	  if (y < y0$2) y0$2 = y;
+	  if (y > y1) y1 = y;
+	}
 
-	    // Now connect the enter nodes to their following update node, such that
-	    // appendChild can insert the materialized enter node before this node,
-	    // rather than at the end of the parent node.
-	    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
-	      if (previous = enterGroup[i0]) {
-	        if (i0 >= i1) { i1 = i0 + 1; }
-	        while (!(next = updateGroup[i1]) && ++i1 < dataLength){ }
-	        previous._next = next || null;
-	      }
-	    }
+	var X0$1 = 0,
+	    Y0$1 = 0,
+	    Z0$1 = 0,
+	    X1$1 = 0,
+	    Y1$1 = 0,
+	    Z1$1 = 0,
+	    X2$1 = 0,
+	    Y2$1 = 0,
+	    Z2$1 = 0,
+	    x00$1,
+	    y00$1,
+	    x0$3,
+	    y0$3;
+	var centroidStream$1 = {
+	  point: centroidPoint$1,
+	  lineStart: centroidLineStart$1,
+	  lineEnd: centroidLineEnd$1,
+	  polygonStart: function polygonStart() {
+	    centroidStream$1.lineStart = centroidRingStart$1;
+	    centroidStream$1.lineEnd = centroidRingEnd$1;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    centroidStream$1.point = centroidPoint$1;
+	    centroidStream$1.lineStart = centroidLineStart$1;
+	    centroidStream$1.lineEnd = centroidLineEnd$1;
+	  },
+	  result: function result() {
+	    var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1] : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1] : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1] : [NaN, NaN];
+	    X0$1 = Y0$1 = Z0$1 = X1$1 = Y1$1 = Z1$1 = X2$1 = Y2$1 = Z2$1 = 0;
+	    return centroid;
 	  }
+	};
 
-	  update = new Selection(update, parents);
-	  update._enter = enter;
-	  update._exit = exit;
-	  return update;
+	function centroidPoint$1(x, y) {
+	  X0$1 += x;
+	  Y0$1 += y;
+	  ++Z0$1;
 	}
 
-	function selection_exit() {
-	  return new Selection(this._exit || this._groups.map(sparse), this._parents);
+	function centroidLineStart$1() {
+	  centroidStream$1.point = centroidPointFirstLine;
 	}
 
-	function selection_join(onenter, onupdate, onexit) {
-	  var enter = this.enter(), update = this, exit = this.exit();
-	  enter = typeof onenter === "function" ? onenter(enter) : enter.append(onenter + "");
-	  if (onupdate != null) { update = onupdate(update); }
-	  if (onexit == null) { exit.remove(); } else { onexit(exit); }
-	  return enter && update ? enter.merge(update).order() : update;
+	function centroidPointFirstLine(x, y) {
+	  centroidStream$1.point = centroidPointLine;
+	  centroidPoint$1(x0$3 = x, y0$3 = y);
 	}
 
-	function selection_merge(selection) {
-
-	  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
-	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
-	      if (node = group0[i] || group1[i]) {
-	        merge[i] = node;
-	      }
-	    }
-	  }
-
-	  for (; j < m0; ++j) {
-	    merges[j] = groups0[j];
-	  }
-
-	  return new Selection(merges, this._parents);
+	function centroidPointLine(x, y) {
+	  var dx = x - x0$3,
+	      dy = y - y0$3,
+	      z = sqrt$1(dx * dx + dy * dy);
+	  X1$1 += z * (x0$3 + x) / 2;
+	  Y1$1 += z * (y0$3 + y) / 2;
+	  Z1$1 += z;
+	  centroidPoint$1(x0$3 = x, y0$3 = y);
 	}
 
-	function selection_order() {
-
-	  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
-	    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
-	      if (node = group[i]) {
-	        if (next && node.compareDocumentPosition(next) ^ 4) { next.parentNode.insertBefore(node, next); }
-	        next = node;
-	      }
-	    }
-	  }
-
-	  return this;
+	function centroidLineEnd$1() {
+	  centroidStream$1.point = centroidPoint$1;
 	}
 
-	function selection_sort(compare) {
-	  if (!compare) { compare = ascending; }
-
-	  function compareNode(a, b) {
-	    return a && b ? compare(a.__data__, b.__data__) : !a - !b;
-	  }
-
-	  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        sortgroup[i] = node;
-	      }
-	    }
-	    sortgroup.sort(compareNode);
-	  }
-
-	  return new Selection(sortgroups, this._parents).order();
+	function centroidRingStart$1() {
+	  centroidStream$1.point = centroidPointFirstRing;
 	}
 
-	function ascending(a, b) {
-	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+	function centroidRingEnd$1() {
+	  centroidPointRing(x00$1, y00$1);
 	}
 
-	function selection_call() {
-	  var callback = arguments[0];
-	  arguments[0] = this;
-	  callback.apply(null, arguments);
-	  return this;
+	function centroidPointFirstRing(x, y) {
+	  centroidStream$1.point = centroidPointRing;
+	  centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
 	}
 
-	function selection_nodes() {
-	  var nodes = new Array(this.size()), i = -1;
-	  this.each(function() { nodes[++i] = this; });
-	  return nodes;
+	function centroidPointRing(x, y) {
+	  var dx = x - x0$3,
+	      dy = y - y0$3,
+	      z = sqrt$1(dx * dx + dy * dy);
+	  X1$1 += z * (x0$3 + x) / 2;
+	  Y1$1 += z * (y0$3 + y) / 2;
+	  Z1$1 += z;
+	  z = y0$3 * x - x0$3 * y;
+	  X2$1 += z * (x0$3 + x);
+	  Y2$1 += z * (y0$3 + y);
+	  Z2$1 += z * 3;
+	  centroidPoint$1(x0$3 = x, y0$3 = y);
 	}
 
-	function selection_node() {
-
-	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
-	    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
-	      var node = group[i];
-	      if (node) { return node; }
-	    }
-	  }
-
-	  return null;
+	function PathContext(context) {
+	  this._context = context;
 	}
+	PathContext.prototype = {
+	  _radius: 4.5,
+	  pointRadius: function pointRadius(_) {
+	    return this._radius = _, this;
+	  },
+	  polygonStart: function polygonStart() {
+	    this._line = 0;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    this._line = NaN;
+	  },
+	  lineStart: function lineStart() {
+	    this._point = 0;
+	  },
+	  lineEnd: function lineEnd() {
+	    if (this._line === 0) this._context.closePath();
+	    this._point = NaN;
+	  },
+	  point: function point(x, y) {
+	    switch (this._point) {
+	      case 0:
+	        {
+	          this._context.moveTo(x, y);
 
-	function selection_size() {
-	  var size = 0;
-	  this.each(function() { ++size; });
-	  return size;
-	}
+	          this._point = 1;
+	          break;
+	        }
 
-	function selection_empty() {
-	  return !this.node();
-	}
+	      case 1:
+	        {
+	          this._context.lineTo(x, y);
 
-	function selection_each(callback) {
+	          break;
+	        }
 
-	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
-	    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
-	      if (node = group[i]) { callback.call(node, node.__data__, i, group); }
+	      default:
+	        {
+	          this._context.moveTo(x + this._radius, y);
+
+	          this._context.arc(x, y, this._radius, 0, tau);
+
+	          break;
+	        }
 	    }
+	  },
+	  result: noop
+	};
+
+	var lengthSum$1 = new Adder(),
+	    lengthRing,
+	    x00$2,
+	    y00$2,
+	    x0$4,
+	    y0$4;
+	var lengthStream$1 = {
+	  point: noop,
+	  lineStart: function lineStart() {
+	    lengthStream$1.point = lengthPointFirst$1;
+	  },
+	  lineEnd: function lineEnd() {
+	    if (lengthRing) lengthPoint$1(x00$2, y00$2);
+	    lengthStream$1.point = noop;
+	  },
+	  polygonStart: function polygonStart() {
+	    lengthRing = true;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    lengthRing = null;
+	  },
+	  result: function result() {
+	    var length = +lengthSum$1;
+	    lengthSum$1 = new Adder();
+	    return length;
 	  }
+	};
 
-	  return this;
+	function lengthPointFirst$1(x, y) {
+	  lengthStream$1.point = lengthPoint$1;
+	  x00$2 = x0$4 = x, y00$2 = y0$4 = y;
 	}
 
-	function attrRemove(name) {
-	  return function() {
-	    this.removeAttribute(name);
-	  };
+	function lengthPoint$1(x, y) {
+	  x0$4 -= x, y0$4 -= y;
+	  lengthSum$1.add(sqrt$1(x0$4 * x0$4 + y0$4 * y0$4));
+	  x0$4 = x, y0$4 = y;
 	}
 
-	function attrRemoveNS(fullname) {
-	  return function() {
-	    this.removeAttributeNS(fullname.space, fullname.local);
-	  };
+	function PathString() {
+	  this._string = [];
 	}
+	PathString.prototype = {
+	  _radius: 4.5,
+	  _circle: circle(4.5),
+	  pointRadius: function pointRadius(_) {
+	    if ((_ = +_) !== this._radius) this._radius = _, this._circle = null;
+	    return this;
+	  },
+	  polygonStart: function polygonStart() {
+	    this._line = 0;
+	  },
+	  polygonEnd: function polygonEnd() {
+	    this._line = NaN;
+	  },
+	  lineStart: function lineStart() {
+	    this._point = 0;
+	  },
+	  lineEnd: function lineEnd() {
+	    if (this._line === 0) this._string.push("Z");
+	    this._point = NaN;
+	  },
+	  point: function point(x, y) {
+	    switch (this._point) {
+	      case 0:
+	        {
+	          this._string.push("M", x, ",", y);
 
-	function attrConstant(name, value) {
-	  return function() {
-	    this.setAttribute(name, value);
-	  };
-	}
+	          this._point = 1;
+	          break;
+	        }
 
-	function attrConstantNS(fullname, value) {
-	  return function() {
-	    this.setAttributeNS(fullname.space, fullname.local, value);
-	  };
-	}
+	      case 1:
+	        {
+	          this._string.push("L", x, ",", y);
 
-	function attrFunction(name, value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    if (v == null) { this.removeAttribute(name); }
-	    else { this.setAttribute(name, v); }
-	  };
-	}
+	          break;
+	        }
 
-	function attrFunctionNS(fullname, value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    if (v == null) { this.removeAttributeNS(fullname.space, fullname.local); }
-	    else { this.setAttributeNS(fullname.space, fullname.local, v); }
-	  };
-	}
+	      default:
+	        {
+	          if (this._circle == null) this._circle = circle(this._radius);
 
-	function selection_attr(name, value) {
-	  var fullname = namespace(name);
+	          this._string.push("M", x, ",", y, this._circle);
 
-	  if (arguments.length < 2) {
-	    var node = this.node();
-	    return fullname.local
-	        ? node.getAttributeNS(fullname.space, fullname.local)
-	        : node.getAttribute(fullname);
+	          break;
+	        }
+	    }
+	  },
+	  result: function result() {
+	    if (this._string.length) {
+	      var result = this._string.join("");
+
+	      this._string = [];
+	      return result;
+	    } else {
+	      return null;
+	    }
 	  }
+	};
 
-	  return this.each((value == null
-	      ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
-	      ? (fullname.local ? attrFunctionNS : attrFunction)
-	      : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
+	function circle(radius) {
+	  return "m0," + radius + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius + "z";
 	}
 
-	function defaultView(node) {
-	  return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
-	      || (node.document && node) // node is a Window
-	      || node.defaultView; // node is a Document
-	}
+	function d3_geoPath (projection, context) {
+	  var pointRadius = 4.5,
+	      projectionStream,
+	      contextStream;
 
-	function styleRemove(name) {
-	  return function() {
-	    this.style.removeProperty(name);
-	  };
-	}
+	  function path(object) {
+	    if (object) {
+	      if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
+	      d3_geoStream(object, projectionStream(contextStream));
+	    }
 
-	function styleConstant(name, value, priority) {
-	  return function() {
-	    this.style.setProperty(name, value, priority);
+	    return contextStream.result();
+	  }
+
+	  path.area = function (object) {
+	    d3_geoStream(object, projectionStream(areaStream$1));
+	    return areaStream$1.result();
 	  };
-	}
 
-	function styleFunction(name, value, priority) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    if (v == null) { this.style.removeProperty(name); }
-	    else { this.style.setProperty(name, v, priority); }
+	  path.measure = function (object) {
+	    d3_geoStream(object, projectionStream(lengthStream$1));
+	    return lengthStream$1.result();
 	  };
-	}
 
-	function selection_style(name, value, priority) {
-	  return arguments.length > 1
-	      ? this.each((value == null
-	            ? styleRemove : typeof value === "function"
-	            ? styleFunction
-	            : styleConstant)(name, value, priority == null ? "" : priority))
-	      : styleValue(this.node(), name);
-	}
+	  path.bounds = function (object) {
+	    d3_geoStream(object, projectionStream(boundsStream$1));
+	    return boundsStream$1.result();
+	  };
 
-	function styleValue(node, name) {
-	  return node.style.getPropertyValue(name)
-	      || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
-	}
+	  path.centroid = function (object) {
+	    d3_geoStream(object, projectionStream(centroidStream$1));
+	    return centroidStream$1.result();
+	  };
 
-	function propertyRemove(name) {
-	  return function() {
-	    delete this[name];
+	  path.projection = function (_) {
+	    return arguments.length ? (projectionStream = _ == null ? (projection = null, identity) : (projection = _).stream, path) : projection;
 	  };
-	}
 
-	function propertyConstant(name, value) {
-	  return function() {
-	    this[name] = value;
+	  path.context = function (_) {
+	    if (!arguments.length) return context;
+	    contextStream = _ == null ? (context = null, new PathString()) : new PathContext(context = _);
+	    if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
+	    return path;
 	  };
-	}
 
-	function propertyFunction(name, value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    if (v == null) { delete this[name]; }
-	    else { this[name] = v; }
+	  path.pointRadius = function (_) {
+	    if (!arguments.length) return pointRadius;
+	    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
+	    return path;
 	  };
-	}
 
-	function selection_property(name, value) {
-	  return arguments.length > 1
-	      ? this.each((value == null
-	          ? propertyRemove : typeof value === "function"
-	          ? propertyFunction
-	          : propertyConstant)(name, value))
-	      : this.node()[name];
+	  return path.projection(projection).context(context);
 	}
 
-	function classArray(string) {
-	  return string.trim().split(/^|\s+/);
+	function d3_geoTransform (methods) {
+	  return {
+	    stream: transformer(methods)
+	  };
 	}
+	function transformer(methods) {
+	  return function (stream) {
+	    var s = new TransformStream();
 
-	function classList(node) {
-	  return node.classList || new ClassList(node);
-	}
+	    for (var key in methods) {
+	      s[key] = methods[key];
+	    }
 
-	function ClassList(node) {
-	  this._node = node;
-	  this._names = classArray(node.getAttribute("class") || "");
+	    s.stream = stream;
+	    return s;
+	  };
 	}
 
-	ClassList.prototype = {
-	  add: function(name) {
-	    var i = this._names.indexOf(name);
-	    if (i < 0) {
-	      this._names.push(name);
-	      this._node.setAttribute("class", this._names.join(" "));
-	    }
+	function TransformStream() {}
+
+	TransformStream.prototype = {
+	  constructor: TransformStream,
+	  point: function point(x, y) {
+	    this.stream.point(x, y);
 	  },
-	  remove: function(name) {
-	    var i = this._names.indexOf(name);
-	    if (i >= 0) {
-	      this._names.splice(i, 1);
-	      this._node.setAttribute("class", this._names.join(" "));
-	    }
+	  sphere: function sphere() {
+	    this.stream.sphere();
 	  },
-	  contains: function(name) {
-	    return this._names.indexOf(name) >= 0;
+	  lineStart: function lineStart() {
+	    this.stream.lineStart();
+	  },
+	  lineEnd: function lineEnd() {
+	    this.stream.lineEnd();
+	  },
+	  polygonStart: function polygonStart() {
+	    this.stream.polygonStart();
+	  },
+	  polygonEnd: function polygonEnd() {
+	    this.stream.polygonEnd();
 	  }
 	};
 
-	function classedAdd(node, names) {
-	  var list = classList(node), i = -1, n = names.length;
-	  while (++i < n) { list.add(names[i]); }
+	function fit(projection, fitBounds, object) {
+	  var clip = projection.clipExtent && projection.clipExtent();
+	  projection.scale(150).translate([0, 0]);
+	  if (clip != null) projection.clipExtent(null);
+	  d3_geoStream(object, projection.stream(boundsStream$1));
+	  fitBounds(boundsStream$1.result());
+	  if (clip != null) projection.clipExtent(clip);
+	  return projection;
 	}
 
-	function classedRemove(node, names) {
-	  var list = classList(node), i = -1, n = names.length;
-	  while (++i < n) { list.remove(names[i]); }
+	function fitExtent(projection, extent, object) {
+	  return fit(projection, function (b) {
+	    var w = extent[1][0] - extent[0][0],
+	        h = extent[1][1] - extent[0][1],
+	        k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
+	        x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
+	        y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
+	    projection.scale(150 * k).translate([x, y]);
+	  }, object);
 	}
-
-	function classedTrue(names) {
-	  return function() {
-	    classedAdd(this, names);
-	  };
+	function fitSize(projection, size, object) {
+	  return fitExtent(projection, [[0, 0], size], object);
+	}
+	function fitWidth(projection, width, object) {
+	  return fit(projection, function (b) {
+	    var w = +width,
+	        k = w / (b[1][0] - b[0][0]),
+	        x = (w - k * (b[1][0] + b[0][0])) / 2,
+	        y = -k * b[0][1];
+	    projection.scale(150 * k).translate([x, y]);
+	  }, object);
+	}
+	function fitHeight(projection, height, object) {
+	  return fit(projection, function (b) {
+	    var h = +height,
+	        k = h / (b[1][1] - b[0][1]),
+	        x = -k * b[0][0],
+	        y = (h - k * (b[1][1] + b[0][1])) / 2;
+	    projection.scale(150 * k).translate([x, y]);
+	  }, object);
 	}
 
-	function classedFalse(names) {
-	  return function() {
-	    classedRemove(this, names);
-	  };
+	var maxDepth = 16,
+	    // maximum depth of subdivision
+	cosMinDistance = cos(30 * radians); // cos(minimum angular distance)
+
+	function resample (project, delta2) {
+	  return +delta2 ? resample$1(project, delta2) : resampleNone(project);
 	}
 
-	function classedFunction(names, value) {
-	  return function() {
-	    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
-	  };
+	function resampleNone(project) {
+	  return transformer({
+	    point: function point(x, y) {
+	      x = project(x, y);
+	      this.stream.point(x[0], x[1]);
+	    }
+	  });
 	}
 
-	function selection_classed(name, value) {
-	  var names = classArray(name + "");
+	function resample$1(project, delta2) {
+	  function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
+	    var dx = x1 - x0,
+	        dy = y1 - y0,
+	        d2 = dx * dx + dy * dy;
 
-	  if (arguments.length < 2) {
-	    var list = classList(this.node()), i = -1, n = names.length;
-	    while (++i < n) { if (!list.contains(names[i])) { return false; } }
-	    return true;
+	    if (d2 > 4 * delta2 && depth--) {
+	      var a = a0 + a1,
+	          b = b0 + b1,
+	          c = c0 + c1,
+	          m = sqrt$1(a * a + b * b + c * c),
+	          phi2 = asin(c /= m),
+	          lambda2 = abs$2(abs$2(c) - 1) < epsilon || abs$2(lambda0 - lambda1) < epsilon ? (lambda0 + lambda1) / 2 : atan2(b, a),
+	          p = project(lambda2, phi2),
+	          x2 = p[0],
+	          y2 = p[1],
+	          dx2 = x2 - x0,
+	          dy2 = y2 - y0,
+	          dz = dy * dx2 - dx * dy2;
+
+	      if (dz * dz / d2 > delta2 // perpendicular projected distance
+	      || abs$2((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
+	      || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) {
+	        // angular distance
+	        resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
+	        stream.point(x2, y2);
+	        resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
+	      }
+	    }
 	  }
 
-	  return this.each((typeof value === "function"
-	      ? classedFunction : value
-	      ? classedTrue
-	      : classedFalse)(names, value));
-	}
+	  return function (stream) {
+	    var lambda00, x00, y00, a00, b00, c00, // first point
+	    lambda0, x0, y0, a0, b0, c0; // previous point
 
-	function textRemove() {
-	  this.textContent = "";
-	}
+	    var resampleStream = {
+	      point: point,
+	      lineStart: lineStart,
+	      lineEnd: lineEnd,
+	      polygonStart: function polygonStart() {
+	        stream.polygonStart();
+	        resampleStream.lineStart = ringStart;
+	      },
+	      polygonEnd: function polygonEnd() {
+	        stream.polygonEnd();
+	        resampleStream.lineStart = lineStart;
+	      }
+	    };
 
-	function textConstant(value) {
-	  return function() {
-	    this.textContent = value;
-	  };
-	}
+	    function point(x, y) {
+	      x = project(x, y);
+	      stream.point(x[0], x[1]);
+	    }
 
-	function textFunction(value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    this.textContent = v == null ? "" : v;
-	  };
-	}
+	    function lineStart() {
+	      x0 = NaN;
+	      resampleStream.point = linePoint;
+	      stream.lineStart();
+	    }
 
-	function selection_text(value) {
-	  return arguments.length
-	      ? this.each(value == null
-	          ? textRemove : (typeof value === "function"
-	          ? textFunction
-	          : textConstant)(value))
-	      : this.node().textContent;
-	}
+	    function linePoint(lambda, phi) {
+	      var c = cartesian([lambda, phi]),
+	          p = project(lambda, phi);
+	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
+	      stream.point(x0, y0);
+	    }
 
-	function htmlRemove() {
-	  this.innerHTML = "";
-	}
+	    function lineEnd() {
+	      resampleStream.point = point;
+	      stream.lineEnd();
+	    }
 
-	function htmlConstant(value) {
-	  return function() {
-	    this.innerHTML = value;
-	  };
-	}
+	    function ringStart() {
+	      lineStart();
+	      resampleStream.point = ringPoint;
+	      resampleStream.lineEnd = ringEnd;
+	    }
 
-	function htmlFunction(value) {
-	  return function() {
-	    var v = value.apply(this, arguments);
-	    this.innerHTML = v == null ? "" : v;
-	  };
-	}
+	    function ringPoint(lambda, phi) {
+	      linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
+	      resampleStream.point = linePoint;
+	    }
 
-	function selection_html(value) {
-	  return arguments.length
-	      ? this.each(value == null
-	          ? htmlRemove : (typeof value === "function"
-	          ? htmlFunction
-	          : htmlConstant)(value))
-	      : this.node().innerHTML;
-	}
+	    function ringEnd() {
+	      resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
+	      resampleStream.lineEnd = lineEnd;
+	      lineEnd();
+	    }
 
-	function raise() {
-	  if (this.nextSibling) { this.parentNode.appendChild(this); }
+	    return resampleStream;
+	  };
 	}
 
-	function selection_raise() {
-	  return this.each(raise);
-	}
+	var transformRadians = transformer({
+	  point: function point(x, y) {
+	    this.stream.point(x * radians, y * radians);
+	  }
+	});
 
-	function lower() {
-	  if (this.previousSibling) { this.parentNode.insertBefore(this, this.parentNode.firstChild); }
+	function transformRotate(rotate) {
+	  return transformer({
+	    point: function point(x, y) {
+	      var r = rotate(x, y);
+	      return this.stream.point(r[0], r[1]);
+	    }
+	  });
 	}
 
-	function selection_lower() {
-	  return this.each(lower);
-	}
+	function scaleTranslate(k, dx, dy, sx, sy) {
+	  function transform(x, y) {
+	    x *= sx;
+	    y *= sy;
+	    return [dx + k * x, dy - k * y];
+	  }
 
-	function selection_append(name) {
-	  var create = typeof name === "function" ? name : creator(name);
-	  return this.select(function() {
-	    return this.appendChild(create.apply(this, arguments));
-	  });
-	}
+	  transform.invert = function (x, y) {
+	    return [(x - dx) / k * sx, (dy - y) / k * sy];
+	  };
 
-	function constantNull() {
-	  return null;
+	  return transform;
 	}
 
-	function selection_insert(name, before) {
-	  var create = typeof name === "function" ? name : creator(name),
-	      select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
-	  return this.select(function() {
-	    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
-	  });
-	}
+	function scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
+	  if (!alpha) return scaleTranslate(k, dx, dy, sx, sy);
+	  var cosAlpha = cos(alpha),
+	      sinAlpha = sin(alpha),
+	      a = cosAlpha * k,
+	      b = sinAlpha * k,
+	      ai = cosAlpha / k,
+	      bi = sinAlpha / k,
+	      ci = (sinAlpha * dy - cosAlpha * dx) / k,
+	      fi = (sinAlpha * dx + cosAlpha * dy) / k;
 
-	function remove() {
-	  var parent = this.parentNode;
-	  if (parent) { parent.removeChild(this); }
-	}
+	  function transform(x, y) {
+	    x *= sx;
+	    y *= sy;
+	    return [a * x - b * y + dx, dy - b * x - a * y];
+	  }
 
-	function selection_remove() {
-	  return this.each(remove);
-	}
+	  transform.invert = function (x, y) {
+	    return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
+	  };
 
-	function selection_cloneShallow() {
-	  var clone = this.cloneNode(false), parent = this.parentNode;
-	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
+	  return transform;
 	}
 
-	function selection_cloneDeep() {
-	  var clone = this.cloneNode(true), parent = this.parentNode;
-	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
+	function projection(project) {
+	  return projectionMutator(function () {
+	    return project;
+	  })();
 	}
+	function projectionMutator(projectAt) {
+	  var project,
+	      k = 150,
+	      // scale
+	  x = 480,
+	      y = 250,
+	      // translate
+	  lambda = 0,
+	      phi = 0,
+	      // center
+	  deltaLambda = 0,
+	      deltaPhi = 0,
+	      deltaGamma = 0,
+	      rotate,
+	      // pre-rotate
+	  alpha = 0,
+	      // post-rotate angle
+	  sx = 1,
+	      // reflectX
+	  sy = 1,
+	      // reflectX
+	  theta = null,
+	      preclip = clipAntimeridian,
+	      // pre-clip angle
+	  x0 = null,
+	      y0,
+	      x1,
+	      y1,
+	      postclip = identity,
+	      // post-clip extent
+	  delta2 = 0.5,
+	      // precision
+	  projectResample,
+	      projectTransform,
+	      projectRotateTransform,
+	      cache,
+	      cacheStream;
 
-	function selection_clone(deep) {
-	  return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
-	}
+	  function projection(point) {
+	    return projectRotateTransform(point[0] * radians, point[1] * radians);
+	  }
 
-	function selection_datum(value) {
-	  return arguments.length
-	      ? this.property("__data__", value)
-	      : this.node().__data__;
-	}
+	  function invert(point) {
+	    point = projectRotateTransform.invert(point[0], point[1]);
+	    return point && [point[0] * degrees, point[1] * degrees];
+	  }
 
-	var filterEvents = {};
+	  projection.stream = function (stream) {
+	    return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
+	  };
 
-	var event = null;
+	  projection.preclip = function (_) {
+	    return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
+	  };
 
-	if (typeof document !== "undefined") {
-	  var element = document.documentElement;
-	  if (!("onmouseenter" in element)) {
-	    filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
-	  }
-	}
+	  projection.postclip = function (_) {
+	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+	  };
 
-	function filterContextListener(listener, index, group) {
-	  listener = contextListener(listener, index, group);
-	  return function(event) {
-	    var related = event.relatedTarget;
-	    if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
-	      listener.call(this, event);
-	    }
+	  projection.clipAngle = function (_) {
+	    return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees;
 	  };
-	}
 
-	function contextListener(listener, index, group) {
-	  return function(event1) {
-	    var event0 = event; // Events can be reentrant (e.g., focus).
-	    event = event1;
-	    try {
-	      listener.call(this, this.__data__, index, group);
-	    } finally {
-	      event = event0;
-	    }
+	  projection.clipExtent = function (_) {
+	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
 	  };
-	}
 
-	function parseTypenames$1(typenames) {
-	  return typenames.trim().split(/^|\s+/).map(function(t) {
-	    var name = "", i = t.indexOf(".");
-	    if (i >= 0) { name = t.slice(i + 1), t = t.slice(0, i); }
-	    return {type: t, name: name};
-	  });
-	}
+	  projection.scale = function (_) {
+	    return arguments.length ? (k = +_, recenter()) : k;
+	  };
 
-	function onRemove(typename) {
-	  return function() {
-	    var on = this.__on;
-	    if (!on) { return; }
-	    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
-	      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
-	        this.removeEventListener(o.type, o.listener, o.capture);
-	      } else {
-	        on[++i] = o;
-	      }
-	    }
-	    if (++i) { on.length = i; }
-	    else { delete this.__on; }
+	  projection.translate = function (_) {
+	    return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
 	  };
-	}
 
-	function onAdd(typename, value, capture) {
-	  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
-	  return function(d, i, group) {
-	    var on = this.__on, o, listener = wrap(value, i, group);
-	    if (on) { for (var j = 0, m = on.length; j < m; ++j) {
-	      if ((o = on[j]).type === typename.type && o.name === typename.name) {
-	        this.removeEventListener(o.type, o.listener, o.capture);
-	        this.addEventListener(o.type, o.listener = listener, o.capture = capture);
-	        o.value = value;
-	        return;
-	      }
-	    } }
-	    this.addEventListener(typename.type, listener, capture);
-	    o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
-	    if (!on) { this.__on = [o]; }
-	    else { on.push(o); }
+	  projection.center = function (_) {
+	    return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees, phi * degrees];
 	  };
-	}
 
-	function selection_on(typename, value, capture) {
-	  var typenames = parseTypenames$1(typename + ""), i, n = typenames.length, t;
+	  projection.rotate = function (_) {
+	    return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees, deltaPhi * degrees, deltaGamma * degrees];
+	  };
 
-	  if (arguments.length < 2) {
-	    var on = this.node().__on;
-	    if (on) { for (var j = 0, m = on.length, o; j < m; ++j) {
-	      for (i = 0, o = on[j]; i < n; ++i) {
-	        if ((t = typenames[i]).type === o.type && t.name === o.name) {
-	          return o.value;
-	        }
-	      }
-	    } }
-	    return;
-	  }
+	  projection.angle = function (_) {
+	    return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees;
+	  };
 
-	  on = value ? onAdd : onRemove;
-	  if (capture == null) { capture = false; }
-	  for (i = 0; i < n; ++i) { this.each(on(typenames[i], value, capture)); }
-	  return this;
-	}
+	  projection.reflectX = function (_) {
+	    return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
+	  };
 
-	function customEvent(event1, listener, that, args) {
-	  var event0 = event;
-	  event1.sourceEvent = event;
-	  event = event1;
-	  try {
-	    return listener.apply(that, args);
-	  } finally {
-	    event = event0;
-	  }
-	}
+	  projection.reflectY = function (_) {
+	    return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
+	  };
 
-	function dispatchEvent(node, type, params) {
-	  var window = defaultView(node),
-	      event = window.CustomEvent;
+	  projection.precision = function (_) {
+	    return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt$1(delta2);
+	  };
 
-	  if (typeof event === "function") {
-	    event = new event(type, params);
-	  } else {
-	    event = window.document.createEvent("Event");
-	    if (params) { event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail; }
-	    else { event.initEvent(type, false, false); }
-	  }
+	  projection.fitExtent = function (extent, object) {
+	    return fitExtent(projection, extent, object);
+	  };
 
-	  node.dispatchEvent(event);
-	}
+	  projection.fitSize = function (size, object) {
+	    return fitSize(projection, size, object);
+	  };
 
-	function dispatchConstant(type, params) {
-	  return function() {
-	    return dispatchEvent(this, type, params);
+	  projection.fitWidth = function (width, object) {
+	    return fitWidth(projection, width, object);
 	  };
-	}
 
-	function dispatchFunction(type, params) {
-	  return function() {
-	    return dispatchEvent(this, type, params.apply(this, arguments));
+	  projection.fitHeight = function (height, object) {
+	    return fitHeight(projection, height, object);
 	  };
-	}
 
-	function selection_dispatch(type, params) {
-	  return this.each((typeof params === "function"
-	      ? dispatchFunction
-	      : dispatchConstant)(type, params));
-	}
+	  function recenter() {
+	    var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
+	        transform = scaleTranslateRotate(k, x - center[0], y - center[1], sx, sy, alpha);
+	    rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
+	    projectTransform = compose(project, transform);
+	    projectRotateTransform = compose(rotate, projectTransform);
+	    projectResample = resample(projectTransform, delta2);
+	    return reset();
+	  }
 
-	var root$1 = [null];
+	  function reset() {
+	    cache = cacheStream = null;
+	    return projection;
+	  }
 
-	function Selection(groups, parents) {
-	  this._groups = groups;
-	  this._parents = parents;
+	  return function () {
+	    project = projectAt.apply(this, arguments);
+	    projection.invert = project.invert && invert;
+	    return recenter();
+	  };
 	}
 
-	function selection() {
-	  return new Selection([[document.documentElement]], root$1);
+	function mercatorRaw(lambda, phi) {
+	  return [lambda, log$1(tan((halfPi + phi) / 2))];
 	}
 
-	Selection.prototype = selection.prototype = {
-	  constructor: Selection,
-	  select: selection_select,
-	  selectAll: selection_selectAll,
-	  filter: selection_filter,
-	  data: selection_data,
-	  enter: selection_enter,
-	  exit: selection_exit,
-	  join: selection_join,
-	  merge: selection_merge,
-	  order: selection_order,
-	  sort: selection_sort,
-	  call: selection_call,
-	  nodes: selection_nodes,
-	  node: selection_node,
-	  size: selection_size,
-	  empty: selection_empty,
-	  each: selection_each,
-	  attr: selection_attr,
-	  style: selection_style,
-	  property: selection_property,
-	  classed: selection_classed,
-	  text: selection_text,
-	  html: selection_html,
-	  raise: selection_raise,
-	  lower: selection_lower,
-	  append: selection_append,
-	  insert: selection_insert,
-	  remove: selection_remove,
-	  clone: selection_clone,
-	  datum: selection_datum,
-	  on: selection_on,
-	  dispatch: selection_dispatch
+	mercatorRaw.invert = function (x, y) {
+	  return [x, 2 * atan(exp(y)) - halfPi];
 	};
 
-	function select(selector) {
-	  return typeof selector === "string"
-	      ? new Selection([[document.querySelector(selector)]], [document.documentElement])
-	      : new Selection([[selector]], root$1);
+	function mercator () {
+	  return mercatorProjection(mercatorRaw).scale(961 / tau);
 	}
+	function mercatorProjection(project) {
+	  var m = projection(project),
+	      center = m.center,
+	      scale = m.scale,
+	      translate = m.translate,
+	      clipExtent = m.clipExtent,
+	      x0 = null,
+	      y0,
+	      x1,
+	      y1; // clip extent
 
-	function sourceEvent() {
-	  var current = event, source;
-	  while (source = current.sourceEvent) { current = source; }
-	  return current;
-	}
+	  m.scale = function (_) {
+	    return arguments.length ? (scale(_), reclip()) : scale();
+	  };
+
+	  m.translate = function (_) {
+	    return arguments.length ? (translate(_), reclip()) : translate();
+	  };
+
+	  m.center = function (_) {
+	    return arguments.length ? (center(_), reclip()) : center();
+	  };
 
-	function point(node, event) {
-	  var svg = node.ownerSVGElement || node;
+	  m.clipExtent = function (_) {
+	    return arguments.length ? (_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+	  };
 
-	  if (svg.createSVGPoint) {
-	    var point = svg.createSVGPoint();
-	    point.x = event.clientX, point.y = event.clientY;
-	    point = point.matrixTransform(node.getScreenCTM().inverse());
-	    return [point.x, point.y];
+	  function reclip() {
+	    var k = pi * scale(),
+	        t = m(rotation(m.rotate()).invert([0, 0]));
+	    return clipExtent(x0 == null ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]] : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
 	  }
 
-	  var rect = node.getBoundingClientRect();
-	  return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
+	  return reclip();
 	}
 
-	function mouse(node) {
-	  var event = sourceEvent();
-	  if (event.changedTouches) { event = event.changedTouches[0]; }
-	  return point(node, event);
-	}
+	function d3_geoIdentity () {
+	  var k = 1,
+	      tx = 0,
+	      ty = 0,
+	      sx = 1,
+	      sy = 1,
+	      // scale, translate and reflect
+	  alpha = 0,
+	      ca,
+	      sa,
+	      // angle
+	  x0 = null,
+	      y0,
+	      x1,
+	      y1,
+	      // clip extent
+	  kx = 1,
+	      ky = 1,
+	      transform = transformer({
+	    point: function point(x, y) {
+	      var p = projection([x, y]);
+	      this.stream.point(p[0], p[1]);
+	    }
+	  }),
+	      postclip = identity,
+	      cache,
+	      cacheStream;
 
-	function selectAll(selector) {
-	  return typeof selector === "string"
-	      ? new Selection([document.querySelectorAll(selector)], [document.documentElement])
-	      : new Selection([selector == null ? [] : selector], root$1);
-	}
+	  function reset() {
+	    kx = k * sx;
+	    ky = k * sy;
+	    cache = cacheStream = null;
+	    return projection;
+	  }
 
-	function touch(node, touches, identifier) {
-	  if (arguments.length < 3) { identifier = touches, touches = sourceEvent().changedTouches; }
+	  function projection(p) {
+	    var x = p[0] * kx,
+	        y = p[1] * ky;
 
-	  for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
-	    if ((touch = touches[i]).identifier === identifier) {
-	      return point(node, touch);
+	    if (alpha) {
+	      var t = y * ca - x * sa;
+	      x = x * ca + y * sa;
+	      y = t;
 	    }
+
+	    return [x + tx, y + ty];
 	  }
 
-	  return null;
+	  projection.invert = function (p) {
+	    var x = p[0] - tx,
+	        y = p[1] - ty;
+
+	    if (alpha) {
+	      var t = y * ca + x * sa;
+	      x = x * ca - y * sa;
+	      y = t;
+	    }
+
+	    return [x / kx, y / ky];
+	  };
+
+	  projection.stream = function (stream) {
+	    return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
+	  };
+
+	  projection.postclip = function (_) {
+	    return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+	  };
+
+	  projection.clipExtent = function (_) {
+	    return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+	  };
+
+	  projection.scale = function (_) {
+	    return arguments.length ? (k = +_, reset()) : k;
+	  };
+
+	  projection.translate = function (_) {
+	    return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
+	  };
+
+	  projection.angle = function (_) {
+	    return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees;
+	  };
+
+	  projection.reflectX = function (_) {
+	    return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
+	  };
+
+	  projection.reflectY = function (_) {
+	    return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
+	  };
+
+	  projection.fitExtent = function (extent, object) {
+	    return fitExtent(projection, extent, object);
+	  };
+
+	  projection.fitSize = function (size, object) {
+	    return fitSize(projection, size, object);
+	  };
+
+	  projection.fitWidth = function (width, object) {
+	    return fitWidth(projection, width, object);
+	  };
+
+	  projection.fitHeight = function (height, object) {
+	    return fitHeight(projection, height, object);
+	  };
+
+	  return projection;
 	}
 
-	function nopropagation() {
-	  event.stopImmediatePropagation();
+	// constants
+	var TAU = 2 * Math.PI;
+	var EQUATORIAL_RADIUS = 6356752.314245179;
+	var POLAR_RADIUS = 6378137.0;
+	function geoLatToMeters(dLat) {
+	  return dLat * (TAU * POLAR_RADIUS / 360);
+	}
+	function geoLonToMeters(dLon, atLat) {
+	  return Math.abs(atLat) >= 90 ? 0 : dLon * (TAU * EQUATORIAL_RADIUS / 360) * Math.abs(Math.cos(atLat * (Math.PI / 180)));
+	}
+	function geoMetersToLat(m) {
+	  return m / (TAU * POLAR_RADIUS / 360);
+	}
+	function geoMetersToLon(m, atLat) {
+	  return Math.abs(atLat) >= 90 ? 0 : m / (TAU * EQUATORIAL_RADIUS / 360) / Math.abs(Math.cos(atLat * (Math.PI / 180)));
 	}
+	function geoMetersToOffset(meters, tileSize) {
+	  tileSize = tileSize || 256;
+	  return [meters[0] * tileSize / (TAU * EQUATORIAL_RADIUS), -meters[1] * tileSize / (TAU * POLAR_RADIUS)];
+	}
+	function geoOffsetToMeters(offset, tileSize) {
+	  tileSize = tileSize || 256;
+	  return [offset[0] * TAU * EQUATORIAL_RADIUS / tileSize, -offset[1] * TAU * POLAR_RADIUS / tileSize];
+	} // Equirectangular approximation of spherical distances on Earth
 
-	function noevent() {
-	  event.preventDefault();
-	  event.stopImmediatePropagation();
+	function geoSphericalDistance(a, b) {
+	  var x = geoLonToMeters(a[0] - b[0], (a[1] + b[1]) / 2);
+	  var y = geoLatToMeters(a[1] - b[1]);
+	  return Math.sqrt(x * x + y * y);
+	} // scale to zoom
+
+	function geoScaleToZoom(k, tileSize) {
+	  tileSize = tileSize || 256;
+	  var log2ts = Math.log(tileSize) * Math.LOG2E;
+	  return Math.log(k * TAU) / Math.LN2 - log2ts;
+	} // zoom to scale
+
+	function geoZoomToScale(z, tileSize) {
+	  tileSize = tileSize || 256;
+	  return tileSize * Math.pow(2, z) / TAU;
+	} // returns info about the node from `nodes` closest to the given `point`
+
+	function geoSphericalClosestNode(nodes, point) {
+	  var minDistance = Infinity,
+	      distance;
+	  var indexOfMin;
+
+	  for (var i in nodes) {
+	    distance = geoSphericalDistance(nodes[i].loc, point);
+
+	    if (distance < minDistance) {
+	      minDistance = distance;
+	      indexOfMin = i;
+	    }
+	  }
+
+	  if (indexOfMin !== undefined) {
+	    return {
+	      index: indexOfMin,
+	      distance: minDistance,
+	      node: nodes[indexOfMin]
+	    };
+	  } else {
+	    return null;
+	  }
 	}
 
-	function dragDisable(view) {
-	  var root = view.document.documentElement,
-	      selection = select(view).on("dragstart.drag", noevent, true);
-	  if ("onselectstart" in root) {
-	    selection.on("selectstart.drag", noevent, true);
+	function geoExtent(min, max) {
+	  if (!(this instanceof geoExtent)) {
+	    return new geoExtent(min, max);
+	  } else if (min instanceof geoExtent) {
+	    return min;
+	  } else if (min && min.length === 2 && min[0].length === 2 && min[1].length === 2) {
+	    this[0] = min[0];
+	    this[1] = min[1];
 	  } else {
-	    root.__noselect = root.style.MozUserSelect;
-	    root.style.MozUserSelect = "none";
+	    this[0] = min || [Infinity, Infinity];
+	    this[1] = max || min || [-Infinity, -Infinity];
 	  }
 	}
+	geoExtent.prototype = new Array(2);
+	Object.assign(geoExtent.prototype, {
+	  equals: function equals(obj) {
+	    return this[0][0] === obj[0][0] && this[0][1] === obj[0][1] && this[1][0] === obj[1][0] && this[1][1] === obj[1][1];
+	  },
+	  extend: function extend(obj) {
+	    if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+	    return geoExtent([Math.min(obj[0][0], this[0][0]), Math.min(obj[0][1], this[0][1])], [Math.max(obj[1][0], this[1][0]), Math.max(obj[1][1], this[1][1])]);
+	  },
+	  _extend: function _extend(extent) {
+	    this[0][0] = Math.min(extent[0][0], this[0][0]);
+	    this[0][1] = Math.min(extent[0][1], this[0][1]);
+	    this[1][0] = Math.max(extent[1][0], this[1][0]);
+	    this[1][1] = Math.max(extent[1][1], this[1][1]);
+	  },
+	  area: function area() {
+	    return Math.abs((this[1][0] - this[0][0]) * (this[1][1] - this[0][1]));
+	  },
+	  center: function center() {
+	    return [(this[0][0] + this[1][0]) / 2, (this[0][1] + this[1][1]) / 2];
+	  },
+	  rectangle: function rectangle() {
+	    return [this[0][0], this[0][1], this[1][0], this[1][1]];
+	  },
+	  bbox: function bbox() {
+	    return {
+	      minX: this[0][0],
+	      minY: this[0][1],
+	      maxX: this[1][0],
+	      maxY: this[1][1]
+	    };
+	  },
+	  polygon: function polygon() {
+	    return [[this[0][0], this[0][1]], [this[0][0], this[1][1]], [this[1][0], this[1][1]], [this[1][0], this[0][1]], [this[0][0], this[0][1]]];
+	  },
+	  contains: function contains(obj) {
+	    if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+	    return obj[0][0] >= this[0][0] && obj[0][1] >= this[0][1] && obj[1][0] <= this[1][0] && obj[1][1] <= this[1][1];
+	  },
+	  intersects: function intersects(obj) {
+	    if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+	    return obj[0][0] <= this[1][0] && obj[0][1] <= this[1][1] && obj[1][0] >= this[0][0] && obj[1][1] >= this[0][1];
+	  },
+	  intersection: function intersection(obj) {
+	    if (!this.intersects(obj)) return new geoExtent();
+	    return new geoExtent([Math.max(obj[0][0], this[0][0]), Math.max(obj[0][1], this[0][1])], [Math.min(obj[1][0], this[1][0]), Math.min(obj[1][1], this[1][1])]);
+	  },
+	  percentContainedIn: function percentContainedIn(obj) {
+	    if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+	    var a1 = this.intersection(obj).area();
+	    var a2 = this.area();
+
+	    if (a1 === Infinity || a2 === Infinity) {
+	      return 0;
+	    } else if (a1 === 0 || a2 === 0) {
+	      if (obj.contains(this)) {
+	        return 1;
+	      }
 
-	function yesdrag(view, noclick) {
-	  var root = view.document.documentElement,
-	      selection = select(view).on("dragstart.drag", null);
-	  if (noclick) {
-	    selection.on("click.drag", noevent, true);
-	    setTimeout(function() { selection.on("click.drag", null); }, 0);
+	      return 0;
+	    } else {
+	      return a1 / a2;
+	    }
+	  },
+	  padByMeters: function padByMeters(meters) {
+	    var dLat = geoMetersToLat(meters);
+	    var dLon = geoMetersToLon(meters, this.center()[1]);
+	    return geoExtent([this[0][0] - dLon, this[0][1] - dLat], [this[1][0] + dLon, this[1][1] + dLat]);
+	  },
+	  toParam: function toParam() {
+	    return this.rectangle().join(',');
 	  }
-	  if ("onselectstart" in root) {
-	    selection.on("selectstart.drag", null);
-	  } else {
-	    root.style.MozUserSelect = root.__noselect;
-	    delete root.__noselect;
+	});
+
+	var $every$1 = arrayIteration.every;
+
+
+
+	var STRICT_METHOD$6 = arrayMethodIsStrict('every');
+	var USES_TO_LENGTH$8 = arrayMethodUsesToLength('every');
+
+	// `Array.prototype.every` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.every
+	_export({ target: 'Array', proto: true, forced: !STRICT_METHOD$6 || !USES_TO_LENGTH$8 }, {
+	  every: function every(callbackfn /* , thisArg */) {
+	    return $every$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
+
+	var $reduce$1 = arrayReduce.left;
+
+
+
+	var STRICT_METHOD$7 = arrayMethodIsStrict('reduce');
+	var USES_TO_LENGTH$9 = arrayMethodUsesToLength('reduce', { 1: 0 });
+
+	// `Array.prototype.reduce` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.reduce
+	_export({ target: 'Array', proto: true, forced: !STRICT_METHOD$7 || !USES_TO_LENGTH$9 }, {
+	  reduce: function reduce(callbackfn /* , initialValue */) {
+	    return $reduce$1(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
+
+	function d3_polygonArea (polygon) {
+	  var i = -1,
+	      n = polygon.length,
+	      a,
+	      b = polygon[n - 1],
+	      area = 0;
+
+	  while (++i < n) {
+	    a = b;
+	    b = polygon[i];
+	    area += a[1] * b[0] - a[0] * b[1];
 	  }
+
+	  return area / 2;
 	}
 
-	function constant$1(x) {
-	  return function() {
-	    return x;
-	  };
+	function d3_polygonCentroid (polygon) {
+	  var i = -1,
+	      n = polygon.length,
+	      x = 0,
+	      y = 0,
+	      a,
+	      b = polygon[n - 1],
+	      c,
+	      k = 0;
+
+	  while (++i < n) {
+	    a = b;
+	    b = polygon[i];
+	    k += c = a[0] * b[1] - b[0] * a[1];
+	    x += (a[0] + b[0]) * c;
+	    y += (a[1] + b[1]) * c;
+	  }
+
+	  return k *= 3, [x / k, y / k];
 	}
 
-	function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {
-	  this.target = target;
-	  this.type = type;
-	  this.subject = subject;
-	  this.identifier = id;
-	  this.active = active;
-	  this.x = x;
-	  this.y = y;
-	  this.dx = dx;
-	  this.dy = dy;
-	  this._ = dispatch;
+	// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
+	// the 3D cross product in a quadrant I Cartesian coordinate system (+x is
+	// right, +y is up). Returns a positive value if ABC is counter-clockwise,
+	// negative if clockwise, and zero if the points are collinear.
+	function cross (a, b, c) {
+	  return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
 	}
 
-	DragEvent.prototype.on = function() {
-	  var value = this._.on.apply(this._, arguments);
-	  return value === this._ ? this : value;
-	};
+	function lexicographicOrder(a, b) {
+	  return a[0] - b[0] || a[1] - b[1];
+	} // Computes the upper convex hull per the monotone chain algorithm.
+	// Assumes points.length >= 3, is sorted by x, unique in y.
+	// Returns an array of indices into points in left-to-right order.
 
-	// Ignore right-click, since that should open the context menu.
-	function defaultFilter() {
-	  return !event.ctrlKey && !event.button;
+
+	function computeUpperHullIndexes(points) {
+	  var n = points.length,
+	      indexes = [0, 1];
+	  var size = 2,
+	      i;
+
+	  for (i = 2; i < n; ++i) {
+	    while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) {
+	      --size;
+	    }
+
+	    indexes[size++] = i;
+	  }
+
+	  return indexes.slice(0, size); // remove popped points
 	}
 
-	function defaultContainer() {
-	  return this.parentNode;
+	function d3_polygonHull (points) {
+	  if ((n = points.length) < 3) return null;
+	  var i,
+	      n,
+	      sortedPoints = new Array(n),
+	      flippedPoints = new Array(n);
+
+	  for (i = 0; i < n; ++i) {
+	    sortedPoints[i] = [+points[i][0], +points[i][1], i];
+	  }
+
+	  sortedPoints.sort(lexicographicOrder);
+
+	  for (i = 0; i < n; ++i) {
+	    flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];
+	  }
+
+	  var upperIndexes = computeUpperHullIndexes(sortedPoints),
+	      lowerIndexes = computeUpperHullIndexes(flippedPoints); // Construct the hull polygon, removing possible duplicate endpoints.
+
+	  var skipLeft = lowerIndexes[0] === upperIndexes[0],
+	      skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
+	      hull = []; // Add upper hull in right-to-l order.
+	  // Then add lower hull in left-to-right order.
+
+	  for (i = upperIndexes.length - 1; i >= 0; --i) {
+	    hull.push(points[sortedPoints[upperIndexes[i]][2]]);
+	  }
+
+	  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) {
+	    hull.push(points[sortedPoints[lowerIndexes[i]][2]]);
+	  }
+
+	  return hull;
 	}
 
-	function defaultSubject(d) {
-	  return d == null ? {x: event.x, y: event.y} : d;
+	// vector equals
+	function geoVecEqual(a, b, epsilon) {
+	  if (epsilon) {
+	    return Math.abs(a[0] - b[0]) <= epsilon && Math.abs(a[1] - b[1]) <= epsilon;
+	  } else {
+	    return a[0] === b[0] && a[1] === b[1];
+	  }
+	} // vector addition
+
+	function geoVecAdd(a, b) {
+	  return [a[0] + b[0], a[1] + b[1]];
+	} // vector subtraction
+
+	function geoVecSubtract(a, b) {
+	  return [a[0] - b[0], a[1] - b[1]];
+	} // vector scaling
+
+	function geoVecScale(a, mag) {
+	  return [a[0] * mag, a[1] * mag];
+	} // vector rounding (was: geoRoundCoordinates)
+
+	function geoVecFloor(a) {
+	  return [Math.floor(a[0]), Math.floor(a[1])];
+	} // linear interpolation
+
+	function geoVecInterp(a, b, t) {
+	  return [a[0] + (b[0] - a[0]) * t, a[1] + (b[1] - a[1]) * t];
+	} // http://jsperf.com/id-dist-optimization
+
+	function geoVecLength(a, b) {
+	  return Math.sqrt(geoVecLengthSquare(a, b));
+	} // length of vector raised to the power two
+
+	function geoVecLengthSquare(a, b) {
+	  b = b || [0, 0];
+	  var x = a[0] - b[0];
+	  var y = a[1] - b[1];
+	  return x * x + y * y;
+	} // get a unit vector
+
+	function geoVecNormalize(a) {
+	  var length = Math.sqrt(a[0] * a[0] + a[1] * a[1]);
+
+	  if (length !== 0) {
+	    return geoVecScale(a, 1 / length);
+	  }
+
+	  return [0, 0];
+	} // Return the counterclockwise angle in the range (-pi, pi)
+	// between the positive X axis and the line intersecting a and b.
+
+	function geoVecAngle(a, b) {
+	  return Math.atan2(b[1] - a[1], b[0] - a[0]);
+	} // dot product
+
+	function geoVecDot(a, b, origin) {
+	  origin = origin || [0, 0];
+	  var p = geoVecSubtract(a, origin);
+	  var q = geoVecSubtract(b, origin);
+	  return p[0] * q[0] + p[1] * q[1];
+	} // normalized dot product
+
+	function geoVecNormalizedDot(a, b, origin) {
+	  origin = origin || [0, 0];
+	  var p = geoVecNormalize(geoVecSubtract(a, origin));
+	  var q = geoVecNormalize(geoVecSubtract(b, origin));
+	  return geoVecDot(p, q);
+	} // 2D cross product of OA and OB vectors, returns magnitude of Z vector
+	// Returns a positive value, if OAB makes a counter-clockwise turn,
+	// negative for clockwise turn, and zero if the points are collinear.
+
+	function geoVecCross(a, b, origin) {
+	  origin = origin || [0, 0];
+	  var p = geoVecSubtract(a, origin);
+	  var q = geoVecSubtract(b, origin);
+	  return p[0] * q[1] - p[1] * q[0];
+	} // find closest orthogonal projection of point onto points array
+
+	function geoVecProject(a, points) {
+	  var min = Infinity;
+	  var idx;
+	  var target;
+
+	  for (var i = 0; i < points.length - 1; i++) {
+	    var o = points[i];
+	    var s = geoVecSubtract(points[i + 1], o);
+	    var v = geoVecSubtract(a, o);
+	    var proj = geoVecDot(v, s) / geoVecDot(s, s);
+	    var p;
+
+	    if (proj < 0) {
+	      p = o;
+	    } else if (proj > 1) {
+	      p = points[i + 1];
+	    } else {
+	      p = [o[0] + proj * s[0], o[1] + proj * s[1]];
+	    }
+
+	    var dist = geoVecLength(p, a);
+
+	    if (dist < min) {
+	      min = dist;
+	      idx = i + 1;
+	      target = p;
+	    }
+	  }
+
+	  if (idx !== undefined) {
+	    return {
+	      index: idx,
+	      distance: min,
+	      target: target
+	    };
+	  } else {
+	    return null;
+	  }
 	}
 
-	function defaultTouchable() {
-	  return navigator.maxTouchPoints || ("ontouchstart" in this);
+	// between the positive X axis and the line intersecting a and b.
+
+	function geoAngle(a, b, projection) {
+	  return geoVecAngle(projection(a.loc), projection(b.loc));
 	}
+	function geoEdgeEqual(a, b) {
+	  return a[0] === b[0] && a[1] === b[1] || a[0] === b[1] && a[1] === b[0];
+	} // Rotate all points counterclockwise around a pivot point by given angle
 
-	function d3_drag() {
-	  var filter = defaultFilter,
-	      container = defaultContainer,
-	      subject = defaultSubject,
-	      touchable = defaultTouchable,
-	      gestures = {},
-	      listeners = dispatch("start", "drag", "end"),
-	      active = 0,
-	      mousedownx,
-	      mousedowny,
-	      mousemoving,
-	      touchending,
-	      clickDistance2 = 0;
+	function geoRotate(points, angle, around) {
+	  return points.map(function (point) {
+	    var radial = geoVecSubtract(point, around);
+	    return [radial[0] * Math.cos(angle) - radial[1] * Math.sin(angle) + around[0], radial[0] * Math.sin(angle) + radial[1] * Math.cos(angle) + around[1]];
+	  });
+	} // Choose the edge with the minimal distance from `point` to its orthogonal
+	// projection onto that edge, if such a projection exists, or the distance to
+	// the closest vertex on that edge. Returns an object with the `index` of the
+	// chosen edge, the chosen `loc` on that edge, and the `distance` to to it.
 
-	  function drag(selection) {
-	    selection
-	        .on("mousedown.drag", mousedowned)
-	      .filter(touchable)
-	        .on("touchstart.drag", touchstarted)
-	        .on("touchmove.drag", touchmoved)
-	        .on("touchend.drag touchcancel.drag", touchended)
-	        .style("touch-action", "none")
-	        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
-	  }
-
-	  function mousedowned() {
-	    if (touchending || !filter.apply(this, arguments)) { return; }
-	    var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments);
-	    if (!gesture) { return; }
-	    select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
-	    dragDisable(event.view);
-	    nopropagation();
-	    mousemoving = false;
-	    mousedownx = event.clientX;
-	    mousedowny = event.clientY;
-	    gesture("start");
-	  }
+	function geoChooseEdge(nodes, point, projection, activeID) {
+	  var dist = geoVecLength;
+	  var points = nodes.map(function (n) {
+	    return projection(n.loc);
+	  });
+	  var ids = nodes.map(function (n) {
+	    return n.id;
+	  });
+	  var min = Infinity;
+	  var idx;
+	  var loc;
+
+	  for (var i = 0; i < points.length - 1; i++) {
+	    if (ids[i] === activeID || ids[i + 1] === activeID) continue;
+	    var o = points[i];
+	    var s = geoVecSubtract(points[i + 1], o);
+	    var v = geoVecSubtract(point, o);
+	    var proj = geoVecDot(v, s) / geoVecDot(s, s);
+	    var p;
+
+	    if (proj < 0) {
+	      p = o;
+	    } else if (proj > 1) {
+	      p = points[i + 1];
+	    } else {
+	      p = [o[0] + proj * s[0], o[1] + proj * s[1]];
+	    }
 
-	  function mousemoved() {
-	    noevent();
-	    if (!mousemoving) {
-	      var dx = event.clientX - mousedownx, dy = event.clientY - mousedowny;
-	      mousemoving = dx * dx + dy * dy > clickDistance2;
+	    var d = dist(p, point);
+
+	    if (d < min) {
+	      min = d;
+	      idx = i + 1;
+	      loc = projection.invert(p);
 	    }
-	    gestures.mouse("drag");
 	  }
 
-	  function mouseupped() {
-	    select(event.view).on("mousemove.drag mouseup.drag", null);
-	    yesdrag(event.view, mousemoving);
-	    noevent();
-	    gestures.mouse("end");
+	  if (idx !== undefined) {
+	    return {
+	      index: idx,
+	      distance: min,
+	      loc: loc
+	    };
+	  } else {
+	    return null;
 	  }
+	} // Test active (dragged or drawing) segments against inactive segments
+	// This is used to test e.g. multipolygon rings that cross
+	// `activeNodes` is the ring containing the activeID being dragged.
+	// `inactiveNodes` is the other ring to test against
+
+	function geoHasLineIntersections(activeNodes, inactiveNodes, activeID) {
+	  var actives = [];
+	  var inactives = [];
+	  var j, k, n1, n2, segment; // gather active segments (only segments in activeNodes that contain the activeID)
 
-	  function touchstarted() {
-	    var arguments$1 = arguments;
+	  for (j = 0; j < activeNodes.length - 1; j++) {
+	    n1 = activeNodes[j];
+	    n2 = activeNodes[j + 1];
+	    segment = [n1.loc, n2.loc];
 
-	    if (!filter.apply(this, arguments)) { return; }
-	    var touches = event.changedTouches,
-	        c = container.apply(this, arguments),
-	        n = touches.length, i, gesture;
+	    if (n1.id === activeID || n2.id === activeID) {
+	      actives.push(segment);
+	    }
+	  } // gather inactive segments
 
-	    for (i = 0; i < n; ++i) {
-	      if (gesture = beforestart(touches[i].identifier, c, touch, this, arguments$1)) {
-	        nopropagation();
-	        gesture("start");
+
+	  for (j = 0; j < inactiveNodes.length - 1; j++) {
+	    n1 = inactiveNodes[j];
+	    n2 = inactiveNodes[j + 1];
+	    segment = [n1.loc, n2.loc];
+	    inactives.push(segment);
+	  } // test
+
+
+	  for (j = 0; j < actives.length; j++) {
+	    for (k = 0; k < inactives.length; k++) {
+	      var p = actives[j];
+	      var q = inactives[k];
+	      var hit = geoLineIntersection(p, q);
+
+	      if (hit) {
+	        return true;
 	      }
 	    }
 	  }
 
-	  function touchmoved() {
-	    var touches = event.changedTouches,
-	        n = touches.length, i, gesture;
+	  return false;
+	} // Test active (dragged or drawing) segments against inactive segments
+	// This is used to test whether a way intersects with itself.
 
-	    for (i = 0; i < n; ++i) {
-	      if (gesture = gestures[touches[i].identifier]) {
-	        noevent();
-	        gesture("drag");
+	function geoHasSelfIntersections(nodes, activeID) {
+	  var actives = [];
+	  var inactives = [];
+	  var j, k; // group active and passive segments along the nodes
+
+	  for (j = 0; j < nodes.length - 1; j++) {
+	    var n1 = nodes[j];
+	    var n2 = nodes[j + 1];
+	    var segment = [n1.loc, n2.loc];
+
+	    if (n1.id === activeID || n2.id === activeID) {
+	      actives.push(segment);
+	    } else {
+	      inactives.push(segment);
+	    }
+	  } // test
+
+
+	  for (j = 0; j < actives.length; j++) {
+	    for (k = 0; k < inactives.length; k++) {
+	      var p = actives[j];
+	      var q = inactives[k]; // skip if segments share an endpoint
+
+	      if (geoVecEqual(p[1], q[0]) || geoVecEqual(p[0], q[1]) || geoVecEqual(p[0], q[0]) || geoVecEqual(p[1], q[1])) {
+	        continue;
+	      }
+
+	      var hit = geoLineIntersection(p, q);
+
+	      if (hit) {
+	        var epsilon = 1e-8; // skip if the hit is at the segment's endpoint
+
+	        if (geoVecEqual(p[1], hit, epsilon) || geoVecEqual(p[0], hit, epsilon) || geoVecEqual(q[1], hit, epsilon) || geoVecEqual(q[0], hit, epsilon)) {
+	          continue;
+	        } else {
+	          return true;
+	        }
 	      }
 	    }
 	  }
 
-	  function touchended() {
-	    var touches = event.changedTouches,
-	        n = touches.length, i, gesture;
+	  return false;
+	} // Return the intersection point of 2 line segments.
+	// From https://github.com/pgkelley4/line-segments-intersect
+	// This uses the vector cross product approach described below:
+	//  http://stackoverflow.com/a/565282/786339
 
-	    if (touchending) { clearTimeout(touchending); }
-	    touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
-	    for (i = 0; i < n; ++i) {
-	      if (gesture = gestures[touches[i].identifier]) {
-	        nopropagation();
-	        gesture("end");
-	      }
+	function geoLineIntersection(a, b) {
+	  var p = [a[0][0], a[0][1]];
+	  var p2 = [a[1][0], a[1][1]];
+	  var q = [b[0][0], b[0][1]];
+	  var q2 = [b[1][0], b[1][1]];
+	  var r = geoVecSubtract(p2, p);
+	  var s = geoVecSubtract(q2, q);
+	  var uNumerator = geoVecCross(geoVecSubtract(q, p), r);
+	  var denominator = geoVecCross(r, s);
+
+	  if (uNumerator && denominator) {
+	    var u = uNumerator / denominator;
+	    var t = geoVecCross(geoVecSubtract(q, p), s) / denominator;
+
+	    if (t >= 0 && t <= 1 && u >= 0 && u <= 1) {
+	      return geoVecInterp(p, p2, t);
 	    }
 	  }
 
-	  function beforestart(id, container, point, that, args) {
-	    var p = point(container, id), s, dx, dy,
-	        sublisteners = listeners.copy();
+	  return null;
+	}
+	function geoPathIntersections(path1, path2) {
+	  var intersections = [];
 
-	    if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
-	      if ((event.subject = s = subject.apply(that, args)) == null) { return false; }
-	      dx = s.x - p[0] || 0;
-	      dy = s.y - p[1] || 0;
-	      return true;
-	    })) { return; }
+	  for (var i = 0; i < path1.length - 1; i++) {
+	    for (var j = 0; j < path2.length - 1; j++) {
+	      var a = [path1[i], path1[i + 1]];
+	      var b = [path2[j], path2[j + 1]];
+	      var hit = geoLineIntersection(a, b);
 
-	    return function gesture(type) {
-	      var p0 = p, n;
-	      switch (type) {
-	        case "start": gestures[id] = gesture, n = active++; break;
-	        case "end": delete gestures[id], --active; // nobreak
-	        case "drag": p = point(container, id), n = active; break;
+	      if (hit) {
+	        intersections.push(hit);
 	      }
-	      customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
-	    };
+	    }
 	  }
 
-	  drag.filter = function(_) {
-	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$1(!!_), drag) : filter;
-	  };
+	  return intersections;
+	}
+	function geoPathHasIntersections(path1, path2) {
+	  for (var i = 0; i < path1.length - 1; i++) {
+	    for (var j = 0; j < path2.length - 1; j++) {
+	      var a = [path1[i], path1[i + 1]];
+	      var b = [path2[j], path2[j + 1]];
+	      var hit = geoLineIntersection(a, b);
 
-	  drag.container = function(_) {
-	    return arguments.length ? (container = typeof _ === "function" ? _ : constant$1(_), drag) : container;
-	  };
+	      if (hit) {
+	        return true;
+	      }
+	    }
+	  }
 
-	  drag.subject = function(_) {
-	    return arguments.length ? (subject = typeof _ === "function" ? _ : constant$1(_), drag) : subject;
-	  };
+	  return false;
+	} // Return whether point is contained in polygon.
+	//
+	// `point` should be a 2-item array of coordinates.
+	// `polygon` should be an array of 2-item arrays of coordinates.
+	//
+	// From https://github.com/substack/point-in-polygon.
+	// ray-casting algorithm based on
+	// http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
+	//
 
-	  drag.touchable = function(_) {
-	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$1(!!_), drag) : touchable;
-	  };
+	function geoPointInPolygon(point, polygon) {
+	  var x = point[0];
+	  var y = point[1];
+	  var inside = false;
 
-	  drag.on = function() {
-	    var value = listeners.on.apply(listeners, arguments);
-	    return value === listeners ? drag : value;
-	  };
+	  for (var i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
+	    var xi = polygon[i][0];
+	    var yi = polygon[i][1];
+	    var xj = polygon[j][0];
+	    var yj = polygon[j][1];
+	    var intersect = yi > y !== yj > y && x < (xj - xi) * (y - yi) / (yj - yi) + xi;
+	    if (intersect) inside = !inside;
+	  }
 
-	  drag.clickDistance = function(_) {
-	    return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
-	  };
+	  return inside;
+	}
+	function geoPolygonContainsPolygon(outer, inner) {
+	  return inner.every(function (point) {
+	    return geoPointInPolygon(point, outer);
+	  });
+	}
+	function geoPolygonIntersectsPolygon(outer, inner, checkSegments) {
+	  function testPoints(outer, inner) {
+	    return inner.some(function (point) {
+	      return geoPointInPolygon(point, outer);
+	    });
+	  }
 
-	  return drag;
+	  return testPoints(outer, inner) || !!checkSegments && geoPathHasIntersections(outer, inner);
+	} // http://gis.stackexchange.com/questions/22895/finding-minimum-area-rectangle-for-given-points
+	// http://gis.stackexchange.com/questions/3739/generalisation-strategies-for-building-outlines/3756#3756
+
+	function geoGetSmallestSurroundingRectangle(points) {
+	  var hull = d3_polygonHull(points);
+	  var centroid = d3_polygonCentroid(hull);
+	  var minArea = Infinity;
+	  var ssrExtent = [];
+	  var ssrAngle = 0;
+	  var c1 = hull[0];
+
+	  for (var i = 0; i <= hull.length - 1; i++) {
+	    var c2 = i === hull.length - 1 ? hull[0] : hull[i + 1];
+	    var angle = Math.atan2(c2[1] - c1[1], c2[0] - c1[0]);
+	    var poly = geoRotate(hull, -angle, centroid);
+	    var extent = poly.reduce(function (extent, point) {
+	      return extent.extend(geoExtent(point));
+	    }, geoExtent());
+	    var area = extent.area();
+
+	    if (area < minArea) {
+	      minArea = area;
+	      ssrExtent = extent;
+	      ssrAngle = angle;
+	    }
+
+	    c1 = c2;
+	  }
+
+	  return {
+	    poly: geoRotate(ssrExtent.polygon(), ssrAngle, centroid),
+	    angle: ssrAngle
+	  };
 	}
+	function geoPathLength(path) {
+	  var length = 0;
 
-	function define$1(constructor, factory, prototype) {
-	  constructor.prototype = factory.prototype = prototype;
-	  prototype.constructor = constructor;
+	  for (var i = 0; i < path.length - 1; i++) {
+	    length += geoVecLength(path[i], path[i + 1]);
+	  }
+
+	  return length;
+	} // If the given point is at the edge of the padded viewport,
+	// return a vector that will nudge the viewport in that direction
+
+	function geoViewportEdge(point, dimensions) {
+	  var pad = [80, 20, 50, 20]; // top, right, bottom, left
+
+	  var x = 0;
+	  var y = 0;
+	  if (point[0] > dimensions[0] - pad[1]) x = -10;
+	  if (point[0] < pad[3]) x = 10;
+	  if (point[1] > dimensions[1] - pad[2]) y = -10;
+	  if (point[1] < pad[0]) y = 10;
+
+	  if (x || y) {
+	    return [x, y];
+	  } else {
+	    return null;
+	  }
 	}
 
-	function extend(parent, definition) {
-	  var prototype = Object.create(parent.prototype);
-	  for (var key in definition) { prototype[key] = definition[key]; }
-	  return prototype;
+	var noop$1 = {
+	  value: function value() {}
+	};
+
+	function dispatch() {
+	  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
+	    if (!(t = arguments[i] + "") || t in _ || /[\s.]/.test(t)) throw new Error("illegal type: " + t);
+	    _[t] = [];
+	  }
+
+	  return new Dispatch$1(_);
 	}
 
-	function Color() {}
+	function Dispatch$1(_) {
+	  this._ = _;
+	}
 
-	var darker = 0.7;
-	var brighter = 1 / darker;
+	function parseTypenames(typenames, types) {
+	  return typenames.trim().split(/^|\s+/).map(function (t) {
+	    var name = "",
+	        i = t.indexOf(".");
+	    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+	    if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
+	    return {
+	      type: t,
+	      name: name
+	    };
+	  });
+	}
 
-	var reI = "\\s*([+-]?\\d+)\\s*",
-	    reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
-	    reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
-	    reHex = /^#([0-9a-f]{3,8})$/,
-	    reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
-	    reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
-	    reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
-	    reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
-	    reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
-	    reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
+	Dispatch$1.prototype = dispatch.prototype = {
+	  constructor: Dispatch$1,
+	  on: function on(typename, callback) {
+	    var _ = this._,
+	        T = parseTypenames(typename + "", _),
+	        t,
+	        i = -1,
+	        n = T.length; // If no callback was specified, return the callback of the given type and name.
 
-	var named = {
-	  aliceblue: 0xf0f8ff,
-	  antiquewhite: 0xfaebd7,
-	  aqua: 0x00ffff,
-	  aquamarine: 0x7fffd4,
-	  azure: 0xf0ffff,
-	  beige: 0xf5f5dc,
-	  bisque: 0xffe4c4,
-	  black: 0x000000,
-	  blanchedalmond: 0xffebcd,
-	  blue: 0x0000ff,
-	  blueviolet: 0x8a2be2,
-	  brown: 0xa52a2a,
-	  burlywood: 0xdeb887,
-	  cadetblue: 0x5f9ea0,
-	  chartreuse: 0x7fff00,
-	  chocolate: 0xd2691e,
-	  coral: 0xff7f50,
-	  cornflowerblue: 0x6495ed,
-	  cornsilk: 0xfff8dc,
-	  crimson: 0xdc143c,
-	  cyan: 0x00ffff,
-	  darkblue: 0x00008b,
-	  darkcyan: 0x008b8b,
-	  darkgoldenrod: 0xb8860b,
-	  darkgray: 0xa9a9a9,
-	  darkgreen: 0x006400,
-	  darkgrey: 0xa9a9a9,
-	  darkkhaki: 0xbdb76b,
-	  darkmagenta: 0x8b008b,
-	  darkolivegreen: 0x556b2f,
-	  darkorange: 0xff8c00,
-	  darkorchid: 0x9932cc,
-	  darkred: 0x8b0000,
-	  darksalmon: 0xe9967a,
-	  darkseagreen: 0x8fbc8f,
-	  darkslateblue: 0x483d8b,
-	  darkslategray: 0x2f4f4f,
-	  darkslategrey: 0x2f4f4f,
-	  darkturquoise: 0x00ced1,
-	  darkviolet: 0x9400d3,
-	  deeppink: 0xff1493,
-	  deepskyblue: 0x00bfff,
-	  dimgray: 0x696969,
-	  dimgrey: 0x696969,
-	  dodgerblue: 0x1e90ff,
-	  firebrick: 0xb22222,
-	  floralwhite: 0xfffaf0,
-	  forestgreen: 0x228b22,
-	  fuchsia: 0xff00ff,
-	  gainsboro: 0xdcdcdc,
-	  ghostwhite: 0xf8f8ff,
-	  gold: 0xffd700,
-	  goldenrod: 0xdaa520,
-	  gray: 0x808080,
-	  green: 0x008000,
-	  greenyellow: 0xadff2f,
-	  grey: 0x808080,
-	  honeydew: 0xf0fff0,
-	  hotpink: 0xff69b4,
-	  indianred: 0xcd5c5c,
-	  indigo: 0x4b0082,
-	  ivory: 0xfffff0,
-	  khaki: 0xf0e68c,
-	  lavender: 0xe6e6fa,
-	  lavenderblush: 0xfff0f5,
-	  lawngreen: 0x7cfc00,
-	  lemonchiffon: 0xfffacd,
-	  lightblue: 0xadd8e6,
-	  lightcoral: 0xf08080,
-	  lightcyan: 0xe0ffff,
-	  lightgoldenrodyellow: 0xfafad2,
-	  lightgray: 0xd3d3d3,
-	  lightgreen: 0x90ee90,
-	  lightgrey: 0xd3d3d3,
-	  lightpink: 0xffb6c1,
-	  lightsalmon: 0xffa07a,
-	  lightseagreen: 0x20b2aa,
-	  lightskyblue: 0x87cefa,
-	  lightslategray: 0x778899,
-	  lightslategrey: 0x778899,
-	  lightsteelblue: 0xb0c4de,
-	  lightyellow: 0xffffe0,
-	  lime: 0x00ff00,
-	  limegreen: 0x32cd32,
-	  linen: 0xfaf0e6,
-	  magenta: 0xff00ff,
-	  maroon: 0x800000,
-	  mediumaquamarine: 0x66cdaa,
-	  mediumblue: 0x0000cd,
-	  mediumorchid: 0xba55d3,
-	  mediumpurple: 0x9370db,
-	  mediumseagreen: 0x3cb371,
-	  mediumslateblue: 0x7b68ee,
-	  mediumspringgreen: 0x00fa9a,
-	  mediumturquoise: 0x48d1cc,
-	  mediumvioletred: 0xc71585,
-	  midnightblue: 0x191970,
-	  mintcream: 0xf5fffa,
-	  mistyrose: 0xffe4e1,
-	  moccasin: 0xffe4b5,
-	  navajowhite: 0xffdead,
-	  navy: 0x000080,
-	  oldlace: 0xfdf5e6,
-	  olive: 0x808000,
-	  olivedrab: 0x6b8e23,
-	  orange: 0xffa500,
-	  orangered: 0xff4500,
-	  orchid: 0xda70d6,
-	  palegoldenrod: 0xeee8aa,
-	  palegreen: 0x98fb98,
-	  paleturquoise: 0xafeeee,
-	  palevioletred: 0xdb7093,
-	  papayawhip: 0xffefd5,
-	  peachpuff: 0xffdab9,
-	  peru: 0xcd853f,
-	  pink: 0xffc0cb,
-	  plum: 0xdda0dd,
-	  powderblue: 0xb0e0e6,
-	  purple: 0x800080,
-	  rebeccapurple: 0x663399,
-	  red: 0xff0000,
-	  rosybrown: 0xbc8f8f,
-	  royalblue: 0x4169e1,
-	  saddlebrown: 0x8b4513,
-	  salmon: 0xfa8072,
-	  sandybrown: 0xf4a460,
-	  seagreen: 0x2e8b57,
-	  seashell: 0xfff5ee,
-	  sienna: 0xa0522d,
-	  silver: 0xc0c0c0,
-	  skyblue: 0x87ceeb,
-	  slateblue: 0x6a5acd,
-	  slategray: 0x708090,
-	  slategrey: 0x708090,
-	  snow: 0xfffafa,
-	  springgreen: 0x00ff7f,
-	  steelblue: 0x4682b4,
-	  tan: 0xd2b48c,
-	  teal: 0x008080,
-	  thistle: 0xd8bfd8,
-	  tomato: 0xff6347,
-	  turquoise: 0x40e0d0,
-	  violet: 0xee82ee,
-	  wheat: 0xf5deb3,
-	  white: 0xffffff,
-	  whitesmoke: 0xf5f5f5,
-	  yellow: 0xffff00,
-	  yellowgreen: 0x9acd32
-	};
+	    if (arguments.length < 2) {
+	      while (++i < n) {
+	        if ((t = (typename = T[i]).type) && (t = get$3(_[t], typename.name))) return t;
+	      }
 
-	define$1(Color, color, {
-	  copy: function(channels) {
-	    return Object.assign(new this.constructor, this, channels);
-	  },
-	  displayable: function() {
-	    return this.rgb().displayable();
-	  },
-	  hex: color_formatHex, // Deprecated! Use color.formatHex.
-	  formatHex: color_formatHex,
-	  formatHsl: color_formatHsl,
-	  formatRgb: color_formatRgb,
-	  toString: color_formatRgb
-	});
+	      return;
+	    } // If a type was specified, set the callback for the given type and name.
+	    // Otherwise, if a null callback was specified, remove callbacks of the given name.
 
-	function color_formatHex() {
-	  return this.rgb().formatHex();
-	}
 
-	function color_formatHsl() {
-	  return hslConvert(this).formatHsl();
-	}
+	    if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
 
-	function color_formatRgb() {
-	  return this.rgb().formatRgb();
-	}
+	    while (++i < n) {
+	      if (t = (typename = T[i]).type) _[t] = set$3(_[t], typename.name, callback);else if (callback == null) for (t in _) {
+	        _[t] = set$3(_[t], typename.name, null);
+	      }
+	    }
 
-	function color(format) {
-	  var m, l;
-	  format = (format + "").trim().toLowerCase();
-	  return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000
-	      : l === 3 ? new Rgb((m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1) // #f00
-	      : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
-	      : l === 4 ? rgba((m >> 12 & 0xf) | (m >> 8 & 0xf0), (m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), (((m & 0xf) << 4) | (m & 0xf)) / 0xff) // #f000
-	      : null) // invalid hex
-	      : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
-	      : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
-	      : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
-	      : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
-	      : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
-	      : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
-	      : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins
-	      : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
-	      : null;
-	}
+	    return this;
+	  },
+	  copy: function copy() {
+	    var copy = {},
+	        _ = this._;
 
-	function rgbn(n) {
-	  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
-	}
+	    for (var t in _) {
+	      copy[t] = _[t].slice();
+	    }
 
-	function rgba(r, g, b, a) {
-	  if (a <= 0) { r = g = b = NaN; }
-	  return new Rgb(r, g, b, a);
-	}
+	    return new Dispatch$1(copy);
+	  },
+	  call: function call(type, that) {
+	    if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) {
+	      args[i] = arguments[i + 2];
+	    }
+	    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
 
-	function rgbConvert(o) {
-	  if (!(o instanceof Color)) { o = color(o); }
-	  if (!o) { return new Rgb; }
-	  o = o.rgb();
-	  return new Rgb(o.r, o.g, o.b, o.opacity);
-	}
+	    for (t = this._[type], i = 0, n = t.length; i < n; ++i) {
+	      t[i].value.apply(that, args);
+	    }
+	  },
+	  apply: function apply(type, that, args) {
+	    if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
 
-	function rgb(r, g, b, opacity) {
-	  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
-	}
+	    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) {
+	      t[i].value.apply(that, args);
+	    }
+	  }
+	};
 
-	function Rgb(r, g, b, opacity) {
-	  this.r = +r;
-	  this.g = +g;
-	  this.b = +b;
-	  this.opacity = +opacity;
+	function get$3(type, name) {
+	  for (var i = 0, n = type.length, c; i < n; ++i) {
+	    if ((c = type[i]).name === name) {
+	      return c.value;
+	    }
+	  }
 	}
 
-	define$1(Rgb, rgb, extend(Color, {
-	  brighter: function(k) {
-	    k = k == null ? brighter : Math.pow(brighter, k);
-	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
-	  },
-	  darker: function(k) {
-	    k = k == null ? darker : Math.pow(darker, k);
-	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
-	  },
-	  rgb: function() {
-	    return this;
-	  },
-	  displayable: function() {
-	    return (-0.5 <= this.r && this.r < 255.5)
-	        && (-0.5 <= this.g && this.g < 255.5)
-	        && (-0.5 <= this.b && this.b < 255.5)
-	        && (0 <= this.opacity && this.opacity <= 1);
-	  },
-	  hex: rgb_formatHex, // Deprecated! Use color.formatHex.
-	  formatHex: rgb_formatHex,
-	  formatRgb: rgb_formatRgb,
-	  toString: rgb_formatRgb
-	}));
+	function set$3(type, name, callback) {
+	  for (var i = 0, n = type.length; i < n; ++i) {
+	    if (type[i].name === name) {
+	      type[i] = noop$1, type = type.slice(0, i).concat(type.slice(i + 1));
+	      break;
+	    }
+	  }
 
-	function rgb_formatHex() {
-	  return "#" + hex$1(this.r) + hex$1(this.g) + hex$1(this.b);
+	  if (callback != null) type.push({
+	    name: name,
+	    value: callback
+	  });
+	  return type;
 	}
 
-	function rgb_formatRgb() {
-	  var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
-	  return (a === 1 ? "rgb(" : "rgba(")
-	      + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
-	      + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
-	      + Math.max(0, Math.min(255, Math.round(this.b) || 0))
-	      + (a === 1 ? ")" : ", " + a + ")");
-	}
+	var xhtml = "http://www.w3.org/1999/xhtml";
+	var namespaces = {
+	  svg: "http://www.w3.org/2000/svg",
+	  xhtml: xhtml,
+	  xlink: "http://www.w3.org/1999/xlink",
+	  xml: "http://www.w3.org/XML/1998/namespace",
+	  xmlns: "http://www.w3.org/2000/xmlns/"
+	};
 
-	function hex$1(value) {
-	  value = Math.max(0, Math.min(255, Math.round(value) || 0));
-	  return (value < 16 ? "0" : "") + value.toString(16);
+	function namespace (name) {
+	  var prefix = name += "",
+	      i = prefix.indexOf(":");
+	  if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
+	  return namespaces.hasOwnProperty(prefix) ? {
+	    space: namespaces[prefix],
+	    local: name
+	  } : name; // eslint-disable-line no-prototype-builtins
 	}
 
-	function hsla(h, s, l, a) {
-	  if (a <= 0) { h = s = l = NaN; }
-	  else if (l <= 0 || l >= 1) { h = s = NaN; }
-	  else if (s <= 0) { h = NaN; }
-	  return new Hsl(h, s, l, a);
+	function creatorInherit(name) {
+	  return function () {
+	    var document = this.ownerDocument,
+	        uri = this.namespaceURI;
+	    return uri === xhtml && document.documentElement.namespaceURI === xhtml ? document.createElement(name) : document.createElementNS(uri, name);
+	  };
 	}
 
-	function hslConvert(o) {
-	  if (o instanceof Hsl) { return new Hsl(o.h, o.s, o.l, o.opacity); }
-	  if (!(o instanceof Color)) { o = color(o); }
-	  if (!o) { return new Hsl; }
-	  if (o instanceof Hsl) { return o; }
-	  o = o.rgb();
-	  var r = o.r / 255,
-	      g = o.g / 255,
-	      b = o.b / 255,
-	      min = Math.min(r, g, b),
-	      max = Math.max(r, g, b),
-	      h = NaN,
-	      s = max - min,
-	      l = (max + min) / 2;
-	  if (s) {
-	    if (r === max) { h = (g - b) / s + (g < b) * 6; }
-	    else if (g === max) { h = (b - r) / s + 2; }
-	    else { h = (r - g) / s + 4; }
-	    s /= l < 0.5 ? max + min : 2 - max - min;
-	    h *= 60;
-	  } else {
-	    s = l > 0 && l < 1 ? 0 : h;
-	  }
-	  return new Hsl(h, s, l, o.opacity);
+	function creatorFixed(fullname) {
+	  return function () {
+	    return this.ownerDocument.createElementNS(fullname.space, fullname.local);
+	  };
 	}
 
-	function hsl(h, s, l, opacity) {
-	  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
+	function creator (name) {
+	  var fullname = namespace(name);
+	  return (fullname.local ? creatorFixed : creatorInherit)(fullname);
 	}
 
-	function Hsl(h, s, l, opacity) {
-	  this.h = +h;
-	  this.s = +s;
-	  this.l = +l;
-	  this.opacity = +opacity;
+	function none() {}
+
+	function selector (selector) {
+	  return selector == null ? none : function () {
+	    return this.querySelector(selector);
+	  };
 	}
 
-	define$1(Hsl, hsl, extend(Color, {
-	  brighter: function(k) {
-	    k = k == null ? brighter : Math.pow(brighter, k);
-	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
-	  },
-	  darker: function(k) {
-	    k = k == null ? darker : Math.pow(darker, k);
-	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
-	  },
-	  rgb: function() {
-	    var h = this.h % 360 + (this.h < 0) * 360,
-	        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
-	        l = this.l,
-	        m2 = l + (l < 0.5 ? l : 1 - l) * s,
-	        m1 = 2 * l - m2;
-	    return new Rgb(
-	      hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
-	      hsl2rgb(h, m1, m2),
-	      hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
-	      this.opacity
-	    );
-	  },
-	  displayable: function() {
-	    return (0 <= this.s && this.s <= 1 || isNaN(this.s))
-	        && (0 <= this.l && this.l <= 1)
-	        && (0 <= this.opacity && this.opacity <= 1);
-	  },
-	  formatHsl: function() {
-	    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
-	    return (a === 1 ? "hsl(" : "hsla(")
-	        + (this.h || 0) + ", "
-	        + (this.s || 0) * 100 + "%, "
-	        + (this.l || 0) * 100 + "%"
-	        + (a === 1 ? ")" : ", " + a + ")");
+	function selection_select (select) {
+	  if (typeof select !== "function") select = selector(select);
+
+	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+	        if ("__data__" in node) subnode.__data__ = node.__data__;
+	        subgroup[i] = subnode;
+	      }
+	    }
 	  }
-	}));
 
-	/* From FvD 13.37, CSS Color Module Level 3 */
-	function hsl2rgb(h, m1, m2) {
-	  return (h < 60 ? m1 + (m2 - m1) * h / 60
-	      : h < 180 ? m2
-	      : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
-	      : m1) * 255;
+	  return new Selection(subgroups, this._parents);
 	}
 
-	function constant$2(x) {
-	  return function() {
-	    return x;
-	  };
+	function array (x) {
+	  return _typeof(x) === "object" && "length" in x ? x // Array, TypedArray, NodeList, array-like
+	  : Array.from(x); // Map, Set, iterable, string, or anything else
 	}
 
-	function linear(a, d) {
-	  return function(t) {
-	    return a + t * d;
-	  };
+	function empty() {
+	  return [];
 	}
 
-	function exponential(a, b, y) {
-	  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
-	    return Math.pow(a + t * b, y);
+	function selectorAll (selector) {
+	  return selector == null ? empty : function () {
+	    return this.querySelectorAll(selector);
 	  };
 	}
 
-	function gamma(y) {
-	  return (y = +y) === 1 ? nogamma : function(a, b) {
-	    return b - a ? exponential(a, b, y) : constant$2(isNaN(a) ? b : a);
+	function arrayAll(select) {
+	  return function () {
+	    var group = select.apply(this, arguments);
+	    return group == null ? [] : array(group);
 	  };
 	}
 
-	function nogamma(a, b) {
-	  var d = b - a;
-	  return d ? linear(a, d) : constant$2(isNaN(a) ? b : a);
+	function selection_selectAll (select) {
+	  if (typeof select === "function") select = arrayAll(select);else select = selectorAll(select);
+
+	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        subgroups.push(select.call(node, node.__data__, i, group));
+	        parents.push(node);
+	      }
+	    }
+	  }
+
+	  return new Selection(subgroups, parents);
 	}
 
-	var d3_interpolateRgb = (function rgbGamma(y) {
-	  var color = gamma(y);
+	var $find$1 = arrayIteration.find;
 
-	  function rgb$1(start, end) {
-	    var r = color((start = rgb(start)).r, (end = rgb(end)).r),
-	        g = color(start.g, end.g),
-	        b = color(start.b, end.b),
-	        opacity = nogamma(start.opacity, end.opacity);
-	    return function(t) {
-	      start.r = r(t);
-	      start.g = g(t);
-	      start.b = b(t);
-	      start.opacity = opacity(t);
-	      return start + "";
-	    };
-	  }
 
-	  rgb$1.gamma = rgbGamma;
 
-	  return rgb$1;
-	})(1);
+	var FIND = 'find';
+	var SKIPS_HOLES = true;
 
-	function numberArray(a, b) {
-	  if (!b) { b = []; }
-	  var n = a ? Math.min(b.length, a.length) : 0,
-	      c = b.slice(),
-	      i;
-	  return function(t) {
-	    for (i = 0; i < n; ++i) { c[i] = a[i] * (1 - t) + b[i] * t; }
-	    return c;
-	  };
-	}
+	var USES_TO_LENGTH$a = arrayMethodUsesToLength(FIND);
 
-	function isNumberArray(x) {
-	  return ArrayBuffer.isView(x) && !(x instanceof DataView);
-	}
+	// Shouldn't skip holes
+	if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES = false; });
 
-	function genericArray(a, b) {
-	  var nb = b ? b.length : 0,
-	      na = a ? Math.min(nb, a.length) : 0,
-	      x = new Array(na),
-	      c = new Array(nb),
-	      i;
+	// `Array.prototype.find` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.find
+	_export({ target: 'Array', proto: true, forced: SKIPS_HOLES || !USES_TO_LENGTH$a }, {
+	  find: function find(callbackfn /* , that = undefined */) {
+	    return $find$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+	  }
+	});
 
-	  for (i = 0; i < na; ++i) { x[i] = interpolate(a[i], b[i]); }
-	  for (; i < nb; ++i) { c[i] = b[i]; }
+	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables(FIND);
 
-	  return function(t) {
-	    for (i = 0; i < na; ++i) { c[i] = x[i](t); }
-	    return c;
+	function matcher (selector) {
+	  return function () {
+	    return this.matches(selector);
 	  };
 	}
-
-	function date(a, b) {
-	  var d = new Date;
-	  return a = +a, b = +b, function(t) {
-	    return d.setTime(a * (1 - t) + b * t), d;
+	function childMatcher(selector) {
+	  return function (node) {
+	    return node.matches(selector);
 	  };
 	}
 
-	function d3_interpolateNumber(a, b) {
-	  return a = +a, b = +b, function(t) {
-	    return a * (1 - t) + b * t;
+	var find$1 = Array.prototype.find;
+
+	function childFind(match) {
+	  return function () {
+	    return find$1.call(this.children, match);
 	  };
 	}
 
-	function object(a, b) {
-	  var i = {},
-	      c = {},
-	      k;
-
-	  if (a === null || typeof a !== "object") { a = {}; }
-	  if (b === null || typeof b !== "object") { b = {}; }
-
-	  for (k in b) {
-	    if (k in a) {
-	      i[k] = interpolate(a[k], b[k]);
-	    } else {
-	      c[k] = b[k];
-	    }
-	  }
+	function childFirst() {
+	  return this.firstElementChild;
+	}
 
-	  return function(t) {
-	    for (k in i) { c[k] = i[k](t); }
-	    return c;
-	  };
+	function selection_selectChild (match) {
+	  return this.select(match == null ? childFirst : childFind(typeof match === "function" ? match : childMatcher(match)));
 	}
 
-	var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
-	    reB = new RegExp(reA.source, "g");
+	var filter = Array.prototype.filter;
 
-	function zero(b) {
-	  return function() {
-	    return b;
-	  };
+	function children() {
+	  return this.children;
 	}
 
-	function one(b) {
-	  return function(t) {
-	    return b(t) + "";
+	function childrenFilter(match) {
+	  return function () {
+	    return filter.call(this.children, match);
 	  };
 	}
 
-	function interpolateString(a, b) {
-	  var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
-	      am, // current match in a
-	      bm, // current match in b
-	      bs, // string preceding current number in b, if any
-	      i = -1, // index in s
-	      s = [], // string constants and placeholders
-	      q = []; // number interpolators
+	function selection_selectChildren (match) {
+	  return this.selectAll(match == null ? children : childrenFilter(typeof match === "function" ? match : childMatcher(match)));
+	}
 
-	  // Coerce inputs to strings.
-	  a = a + "", b = b + "";
+	function selection_filter (match) {
+	  if (typeof match !== "function") match = matcher(match);
 
-	  // Interpolate pairs of numbers in a & b.
-	  while ((am = reA.exec(a))
-	      && (bm = reB.exec(b))) {
-	    if ((bs = bm.index) > bi) { // a string precedes the next number in b
-	      bs = b.slice(bi, bs);
-	      if (s[i]) { s[i] += bs; } // coalesce with previous string
-	      else { s[++i] = bs; }
-	    }
-	    if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
-	      if (s[i]) { s[i] += bm; } // coalesce with previous string
-	      else { s[++i] = bm; }
-	    } else { // interpolate non-matching numbers
-	      s[++i] = null;
-	      q.push({i: i, x: d3_interpolateNumber(am, bm)});
+	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+	        subgroup.push(node);
+	      }
 	    }
-	    bi = reB.lastIndex;
-	  }
-
-	  // Add remains of b.
-	  if (bi < b.length) {
-	    bs = b.slice(bi);
-	    if (s[i]) { s[i] += bs; } // coalesce with previous string
-	    else { s[++i] = bs; }
 	  }
 
-	  // Special optimization for only a single match.
-	  // Otherwise, interpolate each of the numbers and rejoin the string.
-	  return s.length < 2 ? (q[0]
-	      ? one(q[0].x)
-	      : zero(b))
-	      : (b = q.length, function(t) {
-	          for (var i = 0, o; i < b; ++i) { s[(o = q[i]).i] = o.x(t); }
-	          return s.join("");
-	        });
+	  return new Selection(subgroups, this._parents);
 	}
 
-	function interpolate(a, b) {
-	  var t = typeof b, c;
-	  return b == null || t === "boolean" ? constant$2(b)
-	      : (t === "number" ? d3_interpolateNumber
-	      : t === "string" ? ((c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString)
-	      : b instanceof color ? d3_interpolateRgb
-	      : b instanceof Date ? date
-	      : isNumberArray(b) ? numberArray
-	      : Array.isArray(b) ? genericArray
-	      : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
-	      : d3_interpolateNumber)(a, b);
+	function sparse (update) {
+	  return new Array(update.length);
 	}
 
-	function interpolateRound(a, b) {
-	  return a = +a, b = +b, function(t) {
-	    return Math.round(a * (1 - t) + b * t);
-	  };
+	function selection_enter () {
+	  return new Selection(this._enter || this._groups.map(sparse), this._parents);
 	}
-
-	var degrees$1 = 180 / Math.PI;
-
-	var identity$1 = {
-	  translateX: 0,
-	  translateY: 0,
-	  rotate: 0,
-	  skewX: 0,
-	  scaleX: 1,
-	  scaleY: 1
+	function EnterNode(parent, datum) {
+	  this.ownerDocument = parent.ownerDocument;
+	  this.namespaceURI = parent.namespaceURI;
+	  this._next = null;
+	  this._parent = parent;
+	  this.__data__ = datum;
+	}
+	EnterNode.prototype = {
+	  constructor: EnterNode,
+	  appendChild: function appendChild(child) {
+	    return this._parent.insertBefore(child, this._next);
+	  },
+	  insertBefore: function insertBefore(child, next) {
+	    return this._parent.insertBefore(child, next);
+	  },
+	  querySelector: function querySelector(selector) {
+	    return this._parent.querySelector(selector);
+	  },
+	  querySelectorAll: function querySelectorAll(selector) {
+	    return this._parent.querySelectorAll(selector);
+	  }
 	};
 
-	function decompose(a, b, c, d, e, f) {
-	  var scaleX, scaleY, skewX;
-	  if (scaleX = Math.sqrt(a * a + b * b)) { a /= scaleX, b /= scaleX; }
-	  if (skewX = a * c + b * d) { c -= a * skewX, d -= b * skewX; }
-	  if (scaleY = Math.sqrt(c * c + d * d)) { c /= scaleY, d /= scaleY, skewX /= scaleY; }
-	  if (a * d < b * c) { a = -a, b = -b, skewX = -skewX, scaleX = -scaleX; }
-	  return {
-	    translateX: e,
-	    translateY: f,
-	    rotate: Math.atan2(b, a) * degrees$1,
-	    skewX: Math.atan(skewX) * degrees$1,
-	    scaleX: scaleX,
-	    scaleY: scaleY
+	function constant (x) {
+	  return function () {
+	    return x;
 	  };
 	}
 
-	var cssNode,
-	    cssRoot,
-	    cssView,
-	    svgNode;
+	function bindIndex(parent, group, enter, update, exit, data) {
+	  var i = 0,
+	      node,
+	      groupLength = group.length,
+	      dataLength = data.length; // Put any non-null nodes that fit into update.
+	  // Put any null nodes into enter.
+	  // Put any remaining data into enter.
+
+	  for (; i < dataLength; ++i) {
+	    if (node = group[i]) {
+	      node.__data__ = data[i];
+	      update[i] = node;
+	    } else {
+	      enter[i] = new EnterNode(parent, data[i]);
+	    }
+	  } // Put any non-null nodes that don’t fit into exit.
 
-	function parseCss(value) {
-	  if (value === "none") { return identity$1; }
-	  if (!cssNode) { cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView; }
-	  cssNode.style.transform = value;
-	  value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
-	  cssRoot.removeChild(cssNode);
-	  value = value.slice(7, -1).split(",");
-	  return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
-	}
 
-	function parseSvg(value) {
-	  if (value == null) { return identity$1; }
-	  if (!svgNode) { svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g"); }
-	  svgNode.setAttribute("transform", value);
-	  if (!(value = svgNode.transform.baseVal.consolidate())) { return identity$1; }
-	  value = value.matrix;
-	  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+	  for (; i < groupLength; ++i) {
+	    if (node = group[i]) {
+	      exit[i] = node;
+	    }
+	  }
 	}
 
-	function interpolateTransform(parse, pxComma, pxParen, degParen) {
+	function bindKey(parent, group, enter, update, exit, data, key) {
+	  var i,
+	      node,
+	      nodeByKeyValue = new Map(),
+	      groupLength = group.length,
+	      dataLength = data.length,
+	      keyValues = new Array(groupLength),
+	      keyValue; // Compute the key for each node.
+	  // If multiple nodes have the same key, the duplicates are added to exit.
 
-	  function pop(s) {
-	    return s.length ? s.pop() + " " : "";
-	  }
+	  for (i = 0; i < groupLength; ++i) {
+	    if (node = group[i]) {
+	      keyValues[i] = keyValue = key.call(node, node.__data__, i, group) + "";
 
-	  function translate(xa, ya, xb, yb, s, q) {
-	    if (xa !== xb || ya !== yb) {
-	      var i = s.push("translate(", null, pxComma, null, pxParen);
-	      q.push({i: i - 4, x: d3_interpolateNumber(xa, xb)}, {i: i - 2, x: d3_interpolateNumber(ya, yb)});
-	    } else if (xb || yb) {
-	      s.push("translate(" + xb + pxComma + yb + pxParen);
+	      if (nodeByKeyValue.has(keyValue)) {
+	        exit[i] = node;
+	      } else {
+	        nodeByKeyValue.set(keyValue, node);
+	      }
 	    }
-	  }
+	  } // Compute the key for each datum.
+	  // If there a node associated with this key, join and add it to update.
+	  // If there is not (or the key is a duplicate), add it to enter.
 
-	  function rotate(a, b, s, q) {
-	    if (a !== b) {
-	      if (a - b > 180) { b += 360; } else if (b - a > 180) { a += 360; } // shortest path
-	      q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: d3_interpolateNumber(a, b)});
-	    } else if (b) {
-	      s.push(pop(s) + "rotate(" + b + degParen);
-	    }
-	  }
 
-	  function skewX(a, b, s, q) {
-	    if (a !== b) {
-	      q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: d3_interpolateNumber(a, b)});
-	    } else if (b) {
-	      s.push(pop(s) + "skewX(" + b + degParen);
+	  for (i = 0; i < dataLength; ++i) {
+	    keyValue = key.call(parent, data[i], i, data) + "";
+
+	    if (node = nodeByKeyValue.get(keyValue)) {
+	      update[i] = node;
+	      node.__data__ = data[i];
+	      nodeByKeyValue["delete"](keyValue);
+	    } else {
+	      enter[i] = new EnterNode(parent, data[i]);
 	    }
-	  }
+	  } // Add any remaining nodes that were not bound to data to exit.
 
-	  function scale(xa, ya, xb, yb, s, q) {
-	    if (xa !== xb || ya !== yb) {
-	      var i = s.push(pop(s) + "scale(", null, ",", null, ")");
-	      q.push({i: i - 4, x: d3_interpolateNumber(xa, xb)}, {i: i - 2, x: d3_interpolateNumber(ya, yb)});
-	    } else if (xb !== 1 || yb !== 1) {
-	      s.push(pop(s) + "scale(" + xb + "," + yb + ")");
+
+	  for (i = 0; i < groupLength; ++i) {
+	    if ((node = group[i]) && nodeByKeyValue.get(keyValues[i]) === node) {
+	      exit[i] = node;
 	    }
 	  }
+	}
 
-	  return function(a, b) {
-	    var s = [], // string constants and placeholders
-	        q = []; // number interpolators
-	    a = parse(a), b = parse(b);
-	    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
-	    rotate(a.rotate, b.rotate, s, q);
-	    skewX(a.skewX, b.skewX, s, q);
-	    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
-	    a = b = null; // gc
-	    return function(t) {
-	      var i = -1, n = q.length, o;
-	      while (++i < n) { s[(o = q[i]).i] = o.x(t); }
-	      return s.join("");
-	    };
-	  };
+	function datum(node) {
+	  return node.__data__;
 	}
 
-	var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
-	var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
+	function selection_data (value, key) {
+	  if (!arguments.length) return Array.from(this, datum);
+	  var bind = key ? bindKey : bindIndex,
+	      parents = this._parents,
+	      groups = this._groups;
+	  if (typeof value !== "function") value = constant(value);
 
-	var rho = Math.SQRT2,
-	    rho2 = 2,
-	    rho4 = 4,
-	    epsilon2$1 = 1e-12;
+	  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
+	    var parent = parents[j],
+	        group = groups[j],
+	        groupLength = group.length,
+	        data = array(value.call(parent, parent && parent.__data__, j, parents)),
+	        dataLength = data.length,
+	        enterGroup = enter[j] = new Array(dataLength),
+	        updateGroup = update[j] = new Array(dataLength),
+	        exitGroup = exit[j] = new Array(groupLength);
+	    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key); // Now connect the enter nodes to their following update node, such that
+	    // appendChild can insert the materialized enter node before this node,
+	    // rather than at the end of the parent node.
 
-	function cosh(x) {
-	  return ((x = Math.exp(x)) + 1 / x) / 2;
+	    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
+	      if (previous = enterGroup[i0]) {
+	        if (i0 >= i1) i1 = i0 + 1;
+
+	        while (!(next = updateGroup[i1]) && ++i1 < dataLength) {
+	        }
+
+	        previous._next = next || null;
+	      }
+	    }
+	  }
+
+	  update = new Selection(update, parents);
+	  update._enter = enter;
+	  update._exit = exit;
+	  return update;
 	}
 
-	function sinh(x) {
-	  return ((x = Math.exp(x)) - 1 / x) / 2;
+	function selection_exit () {
+	  return new Selection(this._exit || this._groups.map(sparse), this._parents);
 	}
 
-	function tanh(x) {
-	  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
+	function selection_join (onenter, onupdate, onexit) {
+	  var enter = this.enter(),
+	      update = this,
+	      exit = this.exit();
+	  enter = typeof onenter === "function" ? onenter(enter) : enter.append(onenter + "");
+	  if (onupdate != null) update = onupdate(update);
+	  if (onexit == null) exit.remove();else onexit(exit);
+	  return enter && update ? enter.merge(update).order() : update;
 	}
 
-	// p0 = [ux0, uy0, w0]
-	// p1 = [ux1, uy1, w1]
-	function interpolateZoom(p0, p1) {
-	  var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
-	      ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
-	      dx = ux1 - ux0,
-	      dy = uy1 - uy0,
-	      d2 = dx * dx + dy * dy,
-	      i,
-	      S;
-
-	  // Special case for u0 ≅ u1.
-	  if (d2 < epsilon2$1) {
-	    S = Math.log(w1 / w0) / rho;
-	    i = function(t) {
-	      return [
-	        ux0 + t * dx,
-	        uy0 + t * dy,
-	        w0 * Math.exp(rho * t * S)
-	      ];
-	    };
-	  }
+	function selection_merge (selection) {
+	  if (!(selection instanceof Selection)) throw new Error("invalid merge");
 
-	  // General case.
-	  else {
-	    var d1 = Math.sqrt(d2),
-	        b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
-	        b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
-	        r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
-	        r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
-	    S = (r1 - r0) / rho;
-	    i = function(t) {
-	      var s = t * S,
-	          coshr0 = cosh(r0),
-	          u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
-	      return [
-	        ux0 + u * dx,
-	        uy0 + u * dy,
-	        w0 * coshr0 / cosh(rho * s + r0)
-	      ];
-	    };
+	  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+	      if (node = group0[i] || group1[i]) {
+	        merge[i] = node;
+	      }
+	    }
 	  }
 
-	  i.duration = S * 1000;
+	  for (; j < m0; ++j) {
+	    merges[j] = groups0[j];
+	  }
 
-	  return i;
+	  return new Selection(merges, this._parents);
 	}
 
-	function d3_quantize(interpolator, n) {
-	  var samples = new Array(n);
-	  for (var i = 0; i < n; ++i) { samples[i] = interpolator(i / (n - 1)); }
-	  return samples;
+	function selection_order () {
+	  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
+	    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
+	      if (node = group[i]) {
+	        if (next && node.compareDocumentPosition(next) ^ 4) next.parentNode.insertBefore(node, next);
+	        next = node;
+	      }
+	    }
+	  }
+
+	  return this;
 	}
 
-	var frame = 0, // is an animation frame pending?
-	    timeout = 0, // is a timeout pending?
-	    interval = 0, // are any timers active?
-	    pokeDelay = 1000, // how frequently we check for clock skew
-	    taskHead,
-	    taskTail,
-	    clockLast = 0,
-	    clockNow = 0,
-	    clockSkew = 0,
-	    clock = typeof performance === "object" && performance.now ? performance : Date,
-	    setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
+	function selection_sort (compare) {
+	  if (!compare) compare = ascending;
 
-	function now() {
-	  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
+	  function compareNode(a, b) {
+	    return a && b ? compare(a.__data__, b.__data__) : !a - !b;
+	  }
+
+	  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        sortgroup[i] = node;
+	      }
+	    }
+
+	    sortgroup.sort(compareNode);
+	  }
+
+	  return new Selection(sortgroups, this._parents).order();
 	}
 
-	function clearNow() {
-	  clockNow = 0;
+	function ascending(a, b) {
+	  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
 	}
 
-	function Timer() {
-	  this._call =
-	  this._time =
-	  this._next = null;
+	function selection_call () {
+	  var callback = arguments[0];
+	  arguments[0] = this;
+	  callback.apply(null, arguments);
+	  return this;
 	}
 
-	Timer.prototype = timer.prototype = {
-	  constructor: Timer,
-	  restart: function(callback, delay, time) {
-	    if (typeof callback !== "function") { throw new TypeError("callback is not a function"); }
-	    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
-	    if (!this._next && taskTail !== this) {
-	      if (taskTail) { taskTail._next = this; }
-	      else { taskHead = this; }
-	      taskTail = this;
-	    }
-	    this._call = callback;
-	    this._time = time;
-	    sleep();
-	  },
-	  stop: function() {
-	    if (this._call) {
-	      this._call = null;
-	      this._time = Infinity;
-	      sleep();
+	function selection_nodes () {
+	  return Array.from(this);
+	}
+
+	function selection_node () {
+	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+	    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
+	      var node = group[i];
+	      if (node) return node;
 	    }
 	  }
-	};
 
-	function timer(callback, delay, time) {
-	  var t = new Timer;
-	  t.restart(callback, delay, time);
-	  return t;
+	  return null;
 	}
 
-	function timerFlush() {
-	  now(); // Get the current time, if not already set.
-	  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
-	  var t = taskHead, e;
-	  while (t) {
-	    if ((e = clockNow - t._time) >= 0) { t._call.call(null, e); }
-	    t = t._next;
-	  }
-	  --frame;
-	}
+	function selection_size () {
+	  var size = 0;
+
+	  var _iterator = _createForOfIteratorHelper(this),
+	      _step;
 
-	function wake() {
-	  clockNow = (clockLast = clock.now()) + clockSkew;
-	  frame = timeout = 0;
 	  try {
-	    timerFlush();
+	    for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	      var node = _step.value;
+	      ++size;
+	    } // eslint-disable-line no-unused-vars
+
+	  } catch (err) {
+	    _iterator.e(err);
 	  } finally {
-	    frame = 0;
-	    nap();
-	    clockNow = 0;
+	    _iterator.f();
 	  }
+
+	  return size;
 	}
 
-	function poke() {
-	  var now = clock.now(), delay = now - clockLast;
-	  if (delay > pokeDelay) { clockSkew -= delay, clockLast = now; }
+	function selection_empty () {
+	  return !this.node();
 	}
 
-	function nap() {
-	  var t0, t1 = taskHead, t2, time = Infinity;
-	  while (t1) {
-	    if (t1._call) {
-	      if (time > t1._time) { time = t1._time; }
-	      t0 = t1, t1 = t1._next;
-	    } else {
-	      t2 = t1._next, t1._next = null;
-	      t1 = t0 ? t0._next = t2 : taskHead = t2;
+	function selection_each (callback) {
+	  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+	    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
+	      if (node = group[i]) callback.call(node, node.__data__, i, group);
 	    }
 	  }
-	  taskTail = t0;
-	  sleep(time);
-	}
 
-	function sleep(time) {
-	  if (frame) { return; } // Soonest alarm already set, or will be.
-	  if (timeout) { timeout = clearTimeout(timeout); }
-	  var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
-	  if (delay > 24) {
-	    if (time < Infinity) { timeout = setTimeout(wake, time - clock.now() - clockSkew); }
-	    if (interval) { interval = clearInterval(interval); }
-	  } else {
-	    if (!interval) { clockLast = clock.now(), interval = setInterval(poke, pokeDelay); }
-	    frame = 1, setFrame(wake);
-	  }
+	  return this;
 	}
 
-	function d3_timeout(callback, delay, time) {
-	  var t = new Timer;
-	  delay = delay == null ? 0 : +delay;
-	  t.restart(function(elapsed) {
-	    t.stop();
-	    callback(elapsed + delay);
-	  }, delay, time);
-	  return t;
+	function attrRemove(name) {
+	  return function () {
+	    this.removeAttribute(name);
+	  };
 	}
 
-	var emptyOn = dispatch("start", "end", "cancel", "interrupt");
-	var emptyTween = [];
+	function attrRemoveNS(fullname) {
+	  return function () {
+	    this.removeAttributeNS(fullname.space, fullname.local);
+	  };
+	}
 
-	var CREATED = 0;
-	var SCHEDULED = 1;
-	var STARTING = 2;
-	var STARTED = 3;
-	var RUNNING = 4;
-	var ENDING = 5;
-	var ENDED = 6;
+	function attrConstant(name, value) {
+	  return function () {
+	    this.setAttribute(name, value);
+	  };
+	}
 
-	function schedule(node, name, id, index, group, timing) {
-	  var schedules = node.__transition;
-	  if (!schedules) { node.__transition = {}; }
-	  else if (id in schedules) { return; }
-	  create$7(node, id, {
-	    name: name,
-	    index: index, // For context during callback.
-	    group: group, // For context during callback.
-	    on: emptyOn,
-	    tween: emptyTween,
-	    time: timing.time,
-	    delay: timing.delay,
-	    duration: timing.duration,
-	    ease: timing.ease,
-	    timer: null,
-	    state: CREATED
-	  });
+	function attrConstantNS(fullname, value) {
+	  return function () {
+	    this.setAttributeNS(fullname.space, fullname.local, value);
+	  };
 	}
 
-	function init(node, id) {
-	  var schedule = get$2(node, id);
-	  if (schedule.state > CREATED) { throw new Error("too late; already scheduled"); }
-	  return schedule;
+	function attrFunction(name, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) this.removeAttribute(name);else this.setAttribute(name, v);
+	  };
 	}
 
-	function set$1(node, id) {
-	  var schedule = get$2(node, id);
-	  if (schedule.state > STARTED) { throw new Error("too late; already running"); }
-	  return schedule;
+	function attrFunctionNS(fullname, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) this.removeAttributeNS(fullname.space, fullname.local);else this.setAttributeNS(fullname.space, fullname.local, v);
+	  };
 	}
 
-	function get$2(node, id) {
-	  var schedule = node.__transition;
-	  if (!schedule || !(schedule = schedule[id])) { throw new Error("transition not found"); }
-	  return schedule;
+	function selection_attr (name, value) {
+	  var fullname = namespace(name);
+
+	  if (arguments.length < 2) {
+	    var node = this.node();
+	    return fullname.local ? node.getAttributeNS(fullname.space, fullname.local) : node.getAttribute(fullname);
+	  }
+
+	  return this.each((value == null ? fullname.local ? attrRemoveNS : attrRemove : typeof value === "function" ? fullname.local ? attrFunctionNS : attrFunction : fullname.local ? attrConstantNS : attrConstant)(fullname, value));
 	}
 
-	function create$7(node, id, self) {
-	  var schedules = node.__transition,
-	      tween;
+	function defaultView (node) {
+	  return node.ownerDocument && node.ownerDocument.defaultView || // node is a Node
+	  node.document && node // node is a Window
+	  || node.defaultView; // node is a Document
+	}
 
-	  // Initialize the self timer when the transition is created.
-	  // Note the actual delay is not known until the first callback!
-	  schedules[id] = self;
-	  self.timer = timer(schedule, 0, self.time);
+	function styleRemove(name) {
+	  return function () {
+	    this.style.removeProperty(name);
+	  };
+	}
 
-	  function schedule(elapsed) {
-	    self.state = SCHEDULED;
-	    self.timer.restart(start, self.delay, self.time);
+	function styleConstant(name, value, priority) {
+	  return function () {
+	    this.style.setProperty(name, value, priority);
+	  };
+	}
 
-	    // If the elapsed delay is less than our first sleep, start immediately.
-	    if (self.delay <= elapsed) { start(elapsed - self.delay); }
-	  }
+	function styleFunction(name, value, priority) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) this.style.removeProperty(name);else this.style.setProperty(name, v, priority);
+	  };
+	}
 
-	  function start(elapsed) {
-	    var i, j, n, o;
+	function selection_style (name, value, priority) {
+	  return arguments.length > 1 ? this.each((value == null ? styleRemove : typeof value === "function" ? styleFunction : styleConstant)(name, value, priority == null ? "" : priority)) : styleValue(this.node(), name);
+	}
+	function styleValue(node, name) {
+	  return node.style.getPropertyValue(name) || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
+	}
 
-	    // If the state is not SCHEDULED, then we previously errored on start.
-	    if (self.state !== SCHEDULED) { return stop(); }
+	function propertyRemove(name) {
+	  return function () {
+	    delete this[name];
+	  };
+	}
 
-	    for (i in schedules) {
-	      o = schedules[i];
-	      if (o.name !== self.name) { continue; }
+	function propertyConstant(name, value) {
+	  return function () {
+	    this[name] = value;
+	  };
+	}
 
-	      // While this element already has a starting transition during this frame,
-	      // defer starting an interrupting transition until that transition has a
-	      // chance to tick (and possibly end); see d3/d3-transition#54!
-	      if (o.state === STARTED) { return d3_timeout(start); }
+	function propertyFunction(name, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (v == null) delete this[name];else this[name] = v;
+	  };
+	}
 
-	      // Interrupt the active transition, if any.
-	      if (o.state === RUNNING) {
-	        o.state = ENDED;
-	        o.timer.stop();
-	        o.on.call("interrupt", node, node.__data__, o.index, o.group);
-	        delete schedules[i];
-	      }
+	function selection_property (name, value) {
+	  return arguments.length > 1 ? this.each((value == null ? propertyRemove : typeof value === "function" ? propertyFunction : propertyConstant)(name, value)) : this.node()[name];
+	}
 
-	      // Cancel any pre-empted transitions.
-	      else if (+i < id) {
-	        o.state = ENDED;
-	        o.timer.stop();
-	        o.on.call("cancel", node, node.__data__, o.index, o.group);
-	        delete schedules[i];
-	      }
-	    }
+	function classArray(string) {
+	  return string.trim().split(/^|\s+/);
+	}
 
-	    // Defer the first tick to end of the current frame; see d3/d3#1576.
-	    // Note the transition may be canceled after start and before the first tick!
-	    // Note this must be scheduled before the start event; see d3/d3-transition#16!
-	    // Assuming this is successful, subsequent callbacks go straight to tick.
-	    d3_timeout(function() {
-	      if (self.state === STARTED) {
-	        self.state = RUNNING;
-	        self.timer.restart(tick, self.delay, self.time);
-	        tick(elapsed);
-	      }
-	    });
+	function classList(node) {
+	  return node.classList || new ClassList(node);
+	}
 
-	    // Dispatch the start event.
-	    // Note this must be done before the tween are initialized.
-	    self.state = STARTING;
-	    self.on.call("start", node, node.__data__, self.index, self.group);
-	    if (self.state !== STARTING) { return; } // interrupted
-	    self.state = STARTED;
+	function ClassList(node) {
+	  this._node = node;
+	  this._names = classArray(node.getAttribute("class") || "");
+	}
 
-	    // Initialize the tween, deleting null tween.
-	    tween = new Array(n = self.tween.length);
-	    for (i = 0, j = -1; i < n; ++i) {
-	      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
-	        tween[++j] = o;
-	      }
-	    }
-	    tween.length = j + 1;
-	  }
+	ClassList.prototype = {
+	  add: function add(name) {
+	    var i = this._names.indexOf(name);
 
-	  function tick(elapsed) {
-	    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
-	        i = -1,
-	        n = tween.length;
+	    if (i < 0) {
+	      this._names.push(name);
 
-	    while (++i < n) {
-	      tween[i].call(node, t);
+	      this._node.setAttribute("class", this._names.join(" "));
 	    }
+	  },
+	  remove: function remove(name) {
+	    var i = this._names.indexOf(name);
 
-	    // Dispatch the end event.
-	    if (self.state === ENDING) {
-	      self.on.call("end", node, node.__data__, self.index, self.group);
-	      stop();
+	    if (i >= 0) {
+	      this._names.splice(i, 1);
+
+	      this._node.setAttribute("class", this._names.join(" "));
 	    }
+	  },
+	  contains: function contains(name) {
+	    return this._names.indexOf(name) >= 0;
 	  }
+	};
 
-	  function stop() {
-	    self.state = ENDED;
-	    self.timer.stop();
-	    delete schedules[id];
-	    for (var i in schedules) { return; } // eslint-disable-line no-unused-vars
-	    delete node.__transition;
+	function classedAdd(node, names) {
+	  var list = classList(node),
+	      i = -1,
+	      n = names.length;
+
+	  while (++i < n) {
+	    list.add(names[i]);
 	  }
 	}
 
-	function interrupt(node, name) {
-	  var schedules = node.__transition,
-	      schedule,
-	      active,
-	      empty = true,
-	      i;
-
-	  if (!schedules) { return; }
-
-	  name = name == null ? null : name + "";
+	function classedRemove(node, names) {
+	  var list = classList(node),
+	      i = -1,
+	      n = names.length;
 
-	  for (i in schedules) {
-	    if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
-	    active = schedule.state > STARTING && schedule.state < ENDING;
-	    schedule.state = ENDED;
-	    schedule.timer.stop();
-	    schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
-	    delete schedules[i];
+	  while (++i < n) {
+	    list.remove(names[i]);
 	  }
-
-	  if (empty) { delete node.__transition; }
 	}
 
-	function selection_interrupt(name) {
-	  return this.each(function() {
-	    interrupt(this, name);
-	  });
+	function classedTrue(names) {
+	  return function () {
+	    classedAdd(this, names);
+	  };
 	}
 
-	function tweenRemove(id, name) {
-	  var tween0, tween1;
-	  return function() {
-	    var schedule = set$1(this, id),
-	        tween = schedule.tween;
-
-	    // If this node shared tween with the previous node,
-	    // just assign the updated shared tween and we’re done!
-	    // Otherwise, copy-on-write.
-	    if (tween !== tween0) {
-	      tween1 = tween0 = tween;
-	      for (var i = 0, n = tween1.length; i < n; ++i) {
-	        if (tween1[i].name === name) {
-	          tween1 = tween1.slice();
-	          tween1.splice(i, 1);
-	          break;
-	        }
-	      }
-	    }
-
-	    schedule.tween = tween1;
+	function classedFalse(names) {
+	  return function () {
+	    classedRemove(this, names);
 	  };
 	}
 
-	function tweenFunction(id, name, value) {
-	  var tween0, tween1;
-	  if (typeof value !== "function") { throw new Error; }
-	  return function() {
-	    var schedule = set$1(this, id),
-	        tween = schedule.tween;
-
-	    // If this node shared tween with the previous node,
-	    // just assign the updated shared tween and we’re done!
-	    // Otherwise, copy-on-write.
-	    if (tween !== tween0) {
-	      tween1 = (tween0 = tween).slice();
-	      for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
-	        if (tween1[i].name === name) {
-	          tween1[i] = t;
-	          break;
-	        }
-	      }
-	      if (i === n) { tween1.push(t); }
-	    }
-
-	    schedule.tween = tween1;
+	function classedFunction(names, value) {
+	  return function () {
+	    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
 	  };
 	}
 
-	function transition_tween(name, value) {
-	  var id = this._id;
-
-	  name += "";
+	function selection_classed (name, value) {
+	  var names = classArray(name + "");
 
 	  if (arguments.length < 2) {
-	    var tween = get$2(this.node(), id).tween;
-	    for (var i = 0, n = tween.length, t; i < n; ++i) {
-	      if ((t = tween[i]).name === name) {
-	        return t.value;
-	      }
+	    var list = classList(this.node()),
+	        i = -1,
+	        n = names.length;
+
+	    while (++i < n) {
+	      if (!list.contains(names[i])) return false;
 	    }
-	    return null;
+
+	    return true;
 	  }
 
-	  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
+	  return this.each((typeof value === "function" ? classedFunction : value ? classedTrue : classedFalse)(names, value));
 	}
 
-	function tweenValue(transition, name, value) {
-	  var id = transition._id;
+	function textRemove() {
+	  this.textContent = "";
+	}
 
-	  transition.each(function() {
-	    var schedule = set$1(this, id);
-	    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
-	  });
+	function textConstant(value) {
+	  return function () {
+	    this.textContent = value;
+	  };
+	}
 
-	  return function(node) {
-	    return get$2(node, id).value[name];
+	function textFunction(value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    this.textContent = v == null ? "" : v;
 	  };
 	}
 
-	function interpolate$1(a, b) {
-	  var c;
-	  return (typeof b === "number" ? d3_interpolateNumber
-	      : b instanceof color ? d3_interpolateRgb
-	      : (c = color(b)) ? (b = c, d3_interpolateRgb)
-	      : interpolateString)(a, b);
+	function selection_text (value) {
+	  return arguments.length ? this.each(value == null ? textRemove : (typeof value === "function" ? textFunction : textConstant)(value)) : this.node().textContent;
 	}
 
-	function attrRemove$1(name) {
-	  return function() {
-	    this.removeAttribute(name);
-	  };
+	function htmlRemove() {
+	  this.innerHTML = "";
 	}
 
-	function attrRemoveNS$1(fullname) {
-	  return function() {
-	    this.removeAttributeNS(fullname.space, fullname.local);
+	function htmlConstant(value) {
+	  return function () {
+	    this.innerHTML = value;
 	  };
 	}
 
-	function attrConstant$1(name, interpolate, value1) {
-	  var string00,
-	      string1 = value1 + "",
-	      interpolate0;
-	  return function() {
-	    var string0 = this.getAttribute(name);
-	    return string0 === string1 ? null
-	        : string0 === string00 ? interpolate0
-	        : interpolate0 = interpolate(string00 = string0, value1);
+	function htmlFunction(value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    this.innerHTML = v == null ? "" : v;
 	  };
 	}
 
-	function attrConstantNS$1(fullname, interpolate, value1) {
-	  var string00,
-	      string1 = value1 + "",
-	      interpolate0;
-	  return function() {
-	    var string0 = this.getAttributeNS(fullname.space, fullname.local);
-	    return string0 === string1 ? null
-	        : string0 === string00 ? interpolate0
-	        : interpolate0 = interpolate(string00 = string0, value1);
-	  };
+	function selection_html (value) {
+	  return arguments.length ? this.each(value == null ? htmlRemove : (typeof value === "function" ? htmlFunction : htmlConstant)(value)) : this.node().innerHTML;
 	}
 
-	function attrFunction$1(name, interpolate, value) {
-	  var string00,
-	      string10,
-	      interpolate0;
-	  return function() {
-	    var string0, value1 = value(this), string1;
-	    if (value1 == null) { return void this.removeAttribute(name); }
-	    string0 = this.getAttribute(name);
-	    string1 = value1 + "";
-	    return string0 === string1 ? null
-	        : string0 === string00 && string1 === string10 ? interpolate0
-	        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
-	  };
+	function raise() {
+	  if (this.nextSibling) this.parentNode.appendChild(this);
 	}
 
-	function attrFunctionNS$1(fullname, interpolate, value) {
-	  var string00,
-	      string10,
-	      interpolate0;
-	  return function() {
-	    var string0, value1 = value(this), string1;
-	    if (value1 == null) { return void this.removeAttributeNS(fullname.space, fullname.local); }
-	    string0 = this.getAttributeNS(fullname.space, fullname.local);
-	    string1 = value1 + "";
-	    return string0 === string1 ? null
-	        : string0 === string00 && string1 === string10 ? interpolate0
-	        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
-	  };
+	function selection_raise () {
+	  return this.each(raise);
 	}
 
-	function transition_attr(name, value) {
-	  var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate$1;
-	  return this.attrTween(name, typeof value === "function"
-	      ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value))
-	      : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)
-	      : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value));
+	function lower() {
+	  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
 	}
 
-	function attrInterpolate(name, i) {
-	  return function(t) {
-	    this.setAttribute(name, i.call(this, t));
-	  };
+	function selection_lower () {
+	  return this.each(lower);
 	}
 
-	function attrInterpolateNS(fullname, i) {
-	  return function(t) {
-	    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
-	  };
+	function selection_append (name) {
+	  var create = typeof name === "function" ? name : creator(name);
+	  return this.select(function () {
+	    return this.appendChild(create.apply(this, arguments));
+	  });
 	}
 
-	function attrTweenNS(fullname, value) {
-	  var t0, i0;
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) { t0 = (i0 = i) && attrInterpolateNS(fullname, i); }
-	    return t0;
-	  }
-	  tween._value = value;
-	  return tween;
+	function constantNull() {
+	  return null;
 	}
 
-	function attrTween(name, value) {
-	  var t0, i0;
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) { t0 = (i0 = i) && attrInterpolate(name, i); }
-	    return t0;
-	  }
-	  tween._value = value;
-	  return tween;
+	function selection_insert (name, before) {
+	  var create = typeof name === "function" ? name : creator(name),
+	      select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
+	  return this.select(function () {
+	    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
+	  });
 	}
 
-	function transition_attrTween(name, value) {
-	  var key = "attr." + name;
-	  if (arguments.length < 2) { return (key = this.tween(key)) && key._value; }
-	  if (value == null) { return this.tween(key, null); }
-	  if (typeof value !== "function") { throw new Error; }
-	  var fullname = namespace(name);
-	  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
+	function remove() {
+	  var parent = this.parentNode;
+	  if (parent) parent.removeChild(this);
 	}
 
-	function delayFunction(id, value) {
-	  return function() {
-	    init(this, id).delay = +value.apply(this, arguments);
-	  };
+	function selection_remove () {
+	  return this.each(remove);
 	}
 
-	function delayConstant(id, value) {
-	  return value = +value, function() {
-	    init(this, id).delay = value;
-	  };
+	function selection_cloneShallow() {
+	  var clone = this.cloneNode(false),
+	      parent = this.parentNode;
+	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
 	}
 
-	function transition_delay(value) {
-	  var id = this._id;
+	function selection_cloneDeep() {
+	  var clone = this.cloneNode(true),
+	      parent = this.parentNode;
+	  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
+	}
 
-	  return arguments.length
-	      ? this.each((typeof value === "function"
-	          ? delayFunction
-	          : delayConstant)(id, value))
-	      : get$2(this.node(), id).delay;
+	function selection_clone (deep) {
+	  return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
 	}
 
-	function durationFunction(id, value) {
-	  return function() {
-	    set$1(this, id).duration = +value.apply(this, arguments);
-	  };
+	function selection_datum (value) {
+	  return arguments.length ? this.property("__data__", value) : this.node().__data__;
 	}
 
-	function durationConstant(id, value) {
-	  return value = +value, function() {
-	    set$1(this, id).duration = value;
+	function contextListener(listener) {
+	  return function (event) {
+	    listener.call(this, event, this.__data__);
 	  };
 	}
 
-	function transition_duration(value) {
-	  var id = this._id;
-
-	  return arguments.length
-	      ? this.each((typeof value === "function"
-	          ? durationFunction
-	          : durationConstant)(id, value))
-	      : get$2(this.node(), id).duration;
+	function parseTypenames$1(typenames) {
+	  return typenames.trim().split(/^|\s+/).map(function (t) {
+	    var name = "",
+	        i = t.indexOf(".");
+	    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+	    return {
+	      type: t,
+	      name: name
+	    };
+	  });
 	}
 
-	function easeConstant(id, value) {
-	  if (typeof value !== "function") { throw new Error; }
-	  return function() {
-	    set$1(this, id).ease = value;
-	  };
-	}
+	function onRemove(typename) {
+	  return function () {
+	    var on = this.__on;
+	    if (!on) return;
 
-	function transition_ease(value) {
-	  var id = this._id;
+	    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
+	      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
+	        this.removeEventListener(o.type, o.listener, o.options);
+	      } else {
+	        on[++i] = o;
+	      }
+	    }
 
-	  return arguments.length
-	      ? this.each(easeConstant(id, value))
-	      : get$2(this.node(), id).ease;
+	    if (++i) on.length = i;else delete this.__on;
+	  };
 	}
 
-	function transition_filter(match) {
-	  if (typeof match !== "function") { match = matcher(match); }
-
-	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
-	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
-	        subgroup.push(node);
+	function onAdd(typename, value, options) {
+	  return function () {
+	    var on = this.__on,
+	        o,
+	        listener = contextListener(value);
+	    if (on) for (var j = 0, m = on.length; j < m; ++j) {
+	      if ((o = on[j]).type === typename.type && o.name === typename.name) {
+	        this.removeEventListener(o.type, o.listener, o.options);
+	        this.addEventListener(o.type, o.listener = listener, o.options = options);
+	        o.value = value;
+	        return;
 	      }
 	    }
-	  }
-
-	  return new Transition(subgroups, this._parents, this._name, this._id);
+	    this.addEventListener(typename.type, listener, options);
+	    o = {
+	      type: typename.type,
+	      name: typename.name,
+	      value: value,
+	      listener: listener,
+	      options: options
+	    };
+	    if (!on) this.__on = [o];else on.push(o);
+	  };
 	}
 
-	function transition_merge(transition) {
-	  if (transition._id !== this._id) { throw new Error; }
+	function selection_on (typename, value, options) {
+	  var typenames = parseTypenames$1(typename + ""),
+	      i,
+	      n = typenames.length,
+	      t;
 
-	  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
-	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
-	      if (node = group0[i] || group1[i]) {
-	        merge[i] = node;
+	  if (arguments.length < 2) {
+	    var on = this.node().__on;
+
+	    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
+	      for (i = 0, o = on[j]; i < n; ++i) {
+	        if ((t = typenames[i]).type === o.type && t.name === o.name) {
+	          return o.value;
+	        }
 	      }
 	    }
+	    return;
 	  }
 
-	  for (; j < m0; ++j) {
-	    merges[j] = groups0[j];
-	  }
+	  on = value ? onAdd : onRemove;
 
-	  return new Transition(merges, this._parents, this._name, this._id);
-	}
+	  for (i = 0; i < n; ++i) {
+	    this.each(on(typenames[i], value, options));
+	  }
 
-	function start(name) {
-	  return (name + "").trim().split(/^|\s+/).every(function(t) {
-	    var i = t.indexOf(".");
-	    if (i >= 0) { t = t.slice(0, i); }
-	    return !t || t === "start";
-	  });
+	  return this;
 	}
 
-	function onFunction(id, name, listener) {
-	  var on0, on1, sit = start(name) ? init : set$1;
-	  return function() {
-	    var schedule = sit(this, id),
-	        on = schedule.on;
+	function dispatchEvent$1(node, type, params) {
+	  var window = defaultView(node),
+	      event = window.CustomEvent;
 
-	    // If this node shared a dispatch with the previous node,
-	    // just assign the updated shared dispatch and we’re done!
-	    // Otherwise, copy-on-write.
-	    if (on !== on0) { (on1 = (on0 = on).copy()).on(name, listener); }
+	  if (typeof event === "function") {
+	    event = new event(type, params);
+	  } else {
+	    event = window.document.createEvent("Event");
+	    if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;else event.initEvent(type, false, false);
+	  }
 
-	    schedule.on = on1;
-	  };
+	  node.dispatchEvent(event);
 	}
 
-	function transition_on(name, listener) {
-	  var id = this._id;
-
-	  return arguments.length < 2
-	      ? get$2(this.node(), id).on.on(name)
-	      : this.each(onFunction(id, name, listener));
+	function dispatchConstant(type, params) {
+	  return function () {
+	    return dispatchEvent$1(this, type, params);
+	  };
 	}
 
-	function removeFunction(id) {
-	  return function() {
-	    var parent = this.parentNode;
-	    for (var i in this.__transition) { if (+i !== id) { return; } }
-	    if (parent) { parent.removeChild(this); }
+	function dispatchFunction(type, params) {
+	  return function () {
+	    return dispatchEvent$1(this, type, params.apply(this, arguments));
 	  };
 	}
 
-	function transition_remove() {
-	  return this.on("end.remove", removeFunction(this._id));
+	function selection_dispatch (type, params) {
+	  return this.each((typeof params === "function" ? dispatchFunction : dispatchConstant)(type, params));
 	}
 
-	function transition_select(select) {
-	  var name = this._name,
-	      id = this._id;
-
-	  if (typeof select !== "function") { select = selector(select); }
+	var _marked$2 = /*#__PURE__*/regeneratorRuntime.mark(_callee);
 
-	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
-	        if ("__data__" in node) { subnode.__data__ = node.__data__; }
-	        subgroup[i] = subnode;
-	        schedule(subgroup[i], name, id, i, subgroup, get$2(node, id));
-	      }
-	    }
-	  }
+	function _callee() {
+	  var groups, j, m, group, i, n, node;
+	  return regeneratorRuntime.wrap(function _callee$(_context) {
+	    while (1) {
+	      switch (_context.prev = _context.next) {
+	        case 0:
+	          groups = this._groups, j = 0, m = groups.length;
 
-	  return new Transition(subgroups, this._parents, name, id);
-	}
+	        case 1:
+	          if (!(j < m)) {
+	            _context.next = 13;
+	            break;
+	          }
 
-	function transition_selectAll(select) {
-	  var name = this._name,
-	      id = this._id;
+	          group = groups[j], i = 0, n = group.length;
 
-	  if (typeof select !== "function") { select = selectorAll(select); }
+	        case 3:
+	          if (!(i < n)) {
+	            _context.next = 10;
+	            break;
+	          }
 
-	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        for (var children = select.call(node, node.__data__, i, group), child, inherit = get$2(node, id), k = 0, l = children.length; k < l; ++k) {
-	          if (child = children[k]) {
-	            schedule(child, name, id, k, children, inherit);
+	          if (!(node = group[i])) {
+	            _context.next = 7;
+	            break;
 	          }
-	        }
-	        subgroups.push(children);
-	        parents.push(node);
-	      }
-	    }
-	  }
 
-	  return new Transition(subgroups, parents, name, id);
-	}
+	          _context.next = 7;
+	          return node;
 
-	var Selection$1 = selection.prototype.constructor;
+	        case 7:
+	          ++i;
+	          _context.next = 3;
+	          break;
 
-	function transition_selection() {
-	  return new Selection$1(this._groups, this._parents);
+	        case 10:
+	          ++j;
+	          _context.next = 1;
+	          break;
+
+	        case 13:
+	        case "end":
+	          return _context.stop();
+	      }
+	    }
+	  }, _marked$2, this);
 	}
 
-	function styleNull(name, interpolate) {
-	  var string00,
-	      string10,
-	      interpolate0;
-	  return function() {
-	    var string0 = styleValue(this, name),
-	        string1 = (this.style.removeProperty(name), styleValue(this, name));
-	    return string0 === string1 ? null
-	        : string0 === string00 && string1 === string10 ? interpolate0
-	        : interpolate0 = interpolate(string00 = string0, string10 = string1);
-	  };
+	var root = [null];
+	function Selection(groups, parents) {
+	  this._groups = groups;
+	  this._parents = parents;
 	}
 
-	function styleRemove$1(name) {
-	  return function() {
-	    this.style.removeProperty(name);
-	  };
+	function selection() {
+	  return new Selection([[document.documentElement]], root);
 	}
 
-	function styleConstant$1(name, interpolate, value1) {
-	  var string00,
-	      string1 = value1 + "",
-	      interpolate0;
-	  return function() {
-	    var string0 = styleValue(this, name);
-	    return string0 === string1 ? null
-	        : string0 === string00 ? interpolate0
-	        : interpolate0 = interpolate(string00 = string0, value1);
-	  };
+	function selection_selection() {
+	  return this;
 	}
 
-	function styleFunction$1(name, interpolate, value) {
-	  var string00,
-	      string10,
-	      interpolate0;
-	  return function() {
-	    var string0 = styleValue(this, name),
-	        value1 = value(this),
-	        string1 = value1 + "";
-	    if (value1 == null) { string1 = value1 = (this.style.removeProperty(name), styleValue(this, name)); }
-	    return string0 === string1 ? null
-	        : string0 === string00 && string1 === string10 ? interpolate0
-	        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
-	  };
+	Selection.prototype = selection.prototype = _defineProperty({
+	  constructor: Selection,
+	  select: selection_select,
+	  selectAll: selection_selectAll,
+	  selectChild: selection_selectChild,
+	  selectChildren: selection_selectChildren,
+	  filter: selection_filter,
+	  data: selection_data,
+	  enter: selection_enter,
+	  exit: selection_exit,
+	  join: selection_join,
+	  merge: selection_merge,
+	  selection: selection_selection,
+	  order: selection_order,
+	  sort: selection_sort,
+	  call: selection_call,
+	  nodes: selection_nodes,
+	  node: selection_node,
+	  size: selection_size,
+	  empty: selection_empty,
+	  each: selection_each,
+	  attr: selection_attr,
+	  style: selection_style,
+	  property: selection_property,
+	  classed: selection_classed,
+	  text: selection_text,
+	  html: selection_html,
+	  raise: selection_raise,
+	  lower: selection_lower,
+	  append: selection_append,
+	  insert: selection_insert,
+	  remove: selection_remove,
+	  clone: selection_clone,
+	  datum: selection_datum,
+	  on: selection_on,
+	  dispatch: selection_dispatch
+	}, Symbol.iterator, _callee);
+
+	function select (selector) {
+	  return typeof selector === "string" ? new Selection([[document.querySelector(selector)]], [document.documentElement]) : new Selection([[selector]], root);
 	}
 
-	function styleMaybeRemove(id, name) {
-	  var on0, on1, listener0, key = "style." + name, event = "end." + key, remove;
-	  return function() {
-	    var schedule = set$1(this, id),
-	        on = schedule.on,
-	        listener = schedule.value[key] == null ? remove || (remove = styleRemove$1(name)) : undefined;
+	function sourceEvent (event) {
+	  var sourceEvent;
 
-	    // If this node shared a dispatch with the previous node,
-	    // just assign the updated shared dispatch and we’re done!
-	    // Otherwise, copy-on-write.
-	    if (on !== on0 || listener0 !== listener) { (on1 = (on0 = on).copy()).on(event, listener0 = listener); }
+	  while (sourceEvent = event.sourceEvent) {
+	    event = sourceEvent;
+	  }
 
-	    schedule.on = on1;
-	  };
+	  return event;
 	}
 
-	function transition_style(name, value, priority) {
-	  var i = (name += "") === "transform" ? interpolateTransformCss : interpolate$1;
-	  return value == null ? this
-	      .styleTween(name, styleNull(name, i))
-	      .on("end.style." + name, styleRemove$1(name))
-	    : typeof value === "function" ? this
-	      .styleTween(name, styleFunction$1(name, i, tweenValue(this, "style." + name, value)))
-	      .each(styleMaybeRemove(this._id, name))
-	    : this
-	      .styleTween(name, styleConstant$1(name, i, value), priority)
-	      .on("end.style." + name, null);
-	}
+	function pointer (event, node) {
+	  event = sourceEvent(event);
+	  if (node === undefined) node = event.currentTarget;
 
-	function styleInterpolate(name, i, priority) {
-	  return function(t) {
-	    this.style.setProperty(name, i.call(this, t), priority);
-	  };
-	}
+	  if (node) {
+	    var svg = node.ownerSVGElement || node;
 
-	function styleTween(name, value, priority) {
-	  var t, i0;
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) { t = (i0 = i) && styleInterpolate(name, i, priority); }
-	    return t;
+	    if (svg.createSVGPoint) {
+	      var point = svg.createSVGPoint();
+	      point.x = event.clientX, point.y = event.clientY;
+	      point = point.matrixTransform(node.getScreenCTM().inverse());
+	      return [point.x, point.y];
+	    }
+
+	    if (node.getBoundingClientRect) {
+	      var rect = node.getBoundingClientRect();
+	      return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
+	    }
 	  }
-	  tween._value = value;
-	  return tween;
-	}
 
-	function transition_styleTween(name, value, priority) {
-	  var key = "style." + (name += "");
-	  if (arguments.length < 2) { return (key = this.tween(key)) && key._value; }
-	  if (value == null) { return this.tween(key, null); }
-	  if (typeof value !== "function") { throw new Error; }
-	  return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
+	  return [event.pageX, event.pageY];
 	}
 
-	function textConstant$1(value) {
-	  return function() {
-	    this.textContent = value;
-	  };
+	function selectAll (selector) {
+	  return typeof selector === "string" ? new Selection([document.querySelectorAll(selector)], [document.documentElement]) : new Selection([selector == null ? [] : array(selector)], root);
 	}
 
-	function textFunction$1(value) {
-	  return function() {
-	    var value1 = value(this);
-	    this.textContent = value1 == null ? "" : value1;
-	  };
+	function nopropagation(event) {
+	  event.stopImmediatePropagation();
 	}
-
-	function transition_text(value) {
-	  return this.tween("text", typeof value === "function"
-	      ? textFunction$1(tweenValue(this, "text", value))
-	      : textConstant$1(value == null ? "" : value + ""));
+	function noevent (event) {
+	  event.preventDefault();
+	  event.stopImmediatePropagation();
 	}
 
-	function textInterpolate(i) {
-	  return function(t) {
-	    this.textContent = i.call(this, t);
-	  };
-	}
+	function dragDisable (view) {
+	  var root = view.document.documentElement,
+	      selection = select(view).on("dragstart.drag", noevent, true);
 
-	function textTween(value) {
-	  var t0, i0;
-	  function tween() {
-	    var i = value.apply(this, arguments);
-	    if (i !== i0) { t0 = (i0 = i) && textInterpolate(i); }
-	    return t0;
+	  if ("onselectstart" in root) {
+	    selection.on("selectstart.drag", noevent, true);
+	  } else {
+	    root.__noselect = root.style.MozUserSelect;
+	    root.style.MozUserSelect = "none";
 	  }
-	  tween._value = value;
-	  return tween;
-	}
-
-	function transition_textTween(value) {
-	  var key = "text";
-	  if (arguments.length < 1) { return (key = this.tween(key)) && key._value; }
-	  if (value == null) { return this.tween(key, null); }
-	  if (typeof value !== "function") { throw new Error; }
-	  return this.tween(key, textTween(value));
 	}
+	function yesdrag(view, noclick) {
+	  var root = view.document.documentElement,
+	      selection = select(view).on("dragstart.drag", null);
 
-	function transition_transition() {
-	  var name = this._name,
-	      id0 = this._id,
-	      id1 = newId();
-
-	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        var inherit = get$2(node, id0);
-	        schedule(node, name, id1, i, group, {
-	          time: inherit.time + inherit.delay + inherit.duration,
-	          delay: 0,
-	          duration: inherit.duration,
-	          ease: inherit.ease
-	        });
-	      }
-	    }
+	  if (noclick) {
+	    selection.on("click.drag", noevent, true);
+	    setTimeout(function () {
+	      selection.on("click.drag", null);
+	    }, 0);
 	  }
 
-	  return new Transition(groups, this._parents, name, id1);
+	  if ("onselectstart" in root) {
+	    selection.on("selectstart.drag", null);
+	  } else {
+	    root.style.MozUserSelect = root.__noselect;
+	    delete root.__noselect;
+	  }
 	}
 
-	function transition_end() {
-	  var on0, on1, that = this, id = that._id, size = that.size();
-	  return new Promise(function(resolve, reject) {
-	    var cancel = {value: reject},
-	        end = {value: function() { if (--size === 0) { resolve(); } }};
-
-	    that.each(function() {
-	      var schedule = set$1(this, id),
-	          on = schedule.on;
+	var constant$1 = (function (x) {
+	  return function () {
+	    return x;
+	  };
+	});
 
-	      // If this node shared a dispatch with the previous node,
-	      // just assign the updated shared dispatch and we’re done!
-	      // Otherwise, copy-on-write.
-	      if (on !== on0) {
-	        on1 = (on0 = on).copy();
-	        on1._.cancel.push(cancel);
-	        on1._.interrupt.push(cancel);
-	        on1._.end.push(end);
-	      }
+	// `Object.defineProperties` method
+	// https://tc39.github.io/ecma262/#sec-object.defineproperties
+	_export({ target: 'Object', stat: true, forced: !descriptors, sham: !descriptors }, {
+	  defineProperties: objectDefineProperties
+	});
 
-	      schedule.on = on1;
-	    });
+	function DragEvent(type, _ref) {
+	  var sourceEvent = _ref.sourceEvent,
+	      subject = _ref.subject,
+	      target = _ref.target,
+	      identifier = _ref.identifier,
+	      active = _ref.active,
+	      x = _ref.x,
+	      y = _ref.y,
+	      dx = _ref.dx,
+	      dy = _ref.dy,
+	      dispatch = _ref.dispatch;
+	  Object.defineProperties(this, {
+	    type: {
+	      value: type,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    sourceEvent: {
+	      value: sourceEvent,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    subject: {
+	      value: subject,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    target: {
+	      value: target,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    identifier: {
+	      value: identifier,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    active: {
+	      value: active,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    x: {
+	      value: x,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    y: {
+	      value: y,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    dx: {
+	      value: dx,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    dy: {
+	      value: dy,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    _: {
+	      value: dispatch
+	    }
 	  });
 	}
 
-	var id$3 = 0;
+	DragEvent.prototype.on = function () {
+	  var value = this._.on.apply(this._, arguments);
 
-	function Transition(groups, parents, name, id) {
-	  this._groups = groups;
-	  this._parents = parents;
-	  this._name = name;
-	  this._id = id;
+	  return value === this._ ? this : value;
+	};
+
+	function defaultFilter(event) {
+	  return !event.ctrlKey && !event.button;
 	}
 
-	function transition(name) {
-	  return selection().transition(name);
+	function defaultContainer() {
+	  return this.parentNode;
 	}
 
-	function newId() {
-	  return ++id$3;
+	function defaultSubject(event, d) {
+	  return d == null ? {
+	    x: event.x,
+	    y: event.y
+	  } : d;
 	}
 
-	var selection_prototype = selection.prototype;
+	function defaultTouchable() {
+	  return navigator.maxTouchPoints || "ontouchstart" in this;
+	}
 
-	Transition.prototype = transition.prototype = {
-	  constructor: Transition,
-	  select: transition_select,
-	  selectAll: transition_selectAll,
-	  filter: transition_filter,
-	  merge: transition_merge,
-	  selection: transition_selection,
-	  transition: transition_transition,
-	  call: selection_prototype.call,
-	  nodes: selection_prototype.nodes,
-	  node: selection_prototype.node,
-	  size: selection_prototype.size,
-	  empty: selection_prototype.empty,
-	  each: selection_prototype.each,
-	  on: transition_on,
-	  attr: transition_attr,
-	  attrTween: transition_attrTween,
-	  style: transition_style,
-	  styleTween: transition_styleTween,
-	  text: transition_text,
-	  textTween: transition_textTween,
-	  remove: transition_remove,
-	  tween: transition_tween,
-	  delay: transition_delay,
-	  duration: transition_duration,
-	  ease: transition_ease,
-	  end: transition_end
-	};
+	function d3_drag () {
+	  var filter = defaultFilter,
+	      container = defaultContainer,
+	      subject = defaultSubject,
+	      touchable = defaultTouchable,
+	      gestures = {},
+	      listeners = dispatch("start", "drag", "end"),
+	      active = 0,
+	      mousedownx,
+	      mousedowny,
+	      mousemoving,
+	      touchending,
+	      clickDistance2 = 0;
 
-	function linear$1(t) {
-	  return +t;
-	}
+	  function drag(selection) {
+	    selection.on("mousedown.drag", mousedowned).filter(touchable).on("touchstart.drag", touchstarted).on("touchmove.drag", touchmoved).on("touchend.drag touchcancel.drag", touchended).style("touch-action", "none").style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+	  }
 
-	function cubicInOut(t) {
-	  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
-	}
+	  function mousedowned(event, d) {
+	    if (touchending || !filter.call(this, event, d)) return;
+	    var gesture = beforestart(this, container.call(this, event, d), event, d, "mouse");
+	    if (!gesture) return;
+	    select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
+	    dragDisable(event.view);
+	    nopropagation(event);
+	    mousemoving = false;
+	    mousedownx = event.clientX;
+	    mousedowny = event.clientY;
+	    gesture("start", event);
+	  }
 
-	var defaultTiming = {
-	  time: null, // Set on use.
-	  delay: 0,
-	  duration: 250,
-	  ease: cubicInOut
-	};
+	  function mousemoved(event) {
+	    noevent(event);
 
-	function inherit(node, id) {
-	  var timing;
-	  while (!(timing = node.__transition) || !(timing = timing[id])) {
-	    if (!(node = node.parentNode)) {
-	      return defaultTiming.time = now(), defaultTiming;
+	    if (!mousemoving) {
+	      var dx = event.clientX - mousedownx,
+	          dy = event.clientY - mousedowny;
+	      mousemoving = dx * dx + dy * dy > clickDistance2;
 	    }
+
+	    gestures.mouse("drag", event);
 	  }
-	  return timing;
-	}
 
-	function selection_transition(name) {
-	  var id,
-	      timing;
+	  function mouseupped(event) {
+	    select(event.view).on("mousemove.drag mouseup.drag", null);
+	    yesdrag(event.view, mousemoving);
+	    noevent(event);
+	    gestures.mouse("end", event);
+	  }
 
-	  if (name instanceof Transition) {
-	    id = name._id, name = name._name;
-	  } else {
-	    id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
+	  function touchstarted(event, d) {
+	    if (!filter.call(this, event, d)) return;
+	    var touches = event.changedTouches,
+	        c = container.call(this, event, d),
+	        n = touches.length,
+	        i,
+	        gesture;
+
+	    for (i = 0; i < n; ++i) {
+	      if (gesture = beforestart(this, c, event, d, touches[i].identifier, touches[i])) {
+	        nopropagation(event);
+	        gesture("start", event, touches[i]);
+	      }
+	    }
 	  }
 
-	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
-	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-	      if (node = group[i]) {
-	        schedule(node, name, id, i, group, timing || inherit(node, id));
+	  function touchmoved(event) {
+	    var touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        gesture;
+
+	    for (i = 0; i < n; ++i) {
+	      if (gesture = gestures[touches[i].identifier]) {
+	        noevent(event);
+	        gesture("drag", event, touches[i]);
 	      }
 	    }
 	  }
 
-	  return new Transition(groups, this._parents, name, id);
-	}
+	  function touchended(event) {
+	    var touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        gesture;
+	    if (touchending) clearTimeout(touchending);
+	    touchending = setTimeout(function () {
+	      touchending = null;
+	    }, 500); // Ghost clicks are delayed!
 
-	selection.prototype.interrupt = selection_interrupt;
-	selection.prototype.transition = selection_transition;
+	    for (i = 0; i < n; ++i) {
+	      if (gesture = gestures[touches[i].identifier]) {
+	        nopropagation(event);
+	        gesture("end", event, touches[i]);
+	      }
+	    }
+	  }
 
-	function constant$3(x) {
-	  return function() {
-	    return x;
-	  };
-	}
+	  function beforestart(that, container, event, d, identifier, touch) {
+	    var dispatch = listeners.copy(),
+	        p = pointer(touch || event, container),
+	        dx,
+	        dy,
+	        s;
+	    if ((s = subject.call(that, new DragEvent("beforestart", {
+	      sourceEvent: event,
+	      target: drag,
+	      identifier: identifier,
+	      active: active,
+	      x: p[0],
+	      y: p[1],
+	      dx: 0,
+	      dy: 0,
+	      dispatch: dispatch
+	    }), d)) == null) return;
+	    dx = s.x - p[0] || 0;
+	    dy = s.y - p[1] || 0;
+	    return function gesture(type, event, touch) {
+	      var p0 = p,
+	          n;
 
-	function ZoomEvent(target, type, transform) {
-	  this.target = target;
-	  this.type = type;
-	  this.transform = transform;
-	}
+	      switch (type) {
+	        case "start":
+	          gestures[identifier] = gesture, n = active++;
+	          break;
 
-	function Transform(k, x, y) {
-	  this.k = k;
-	  this.x = x;
-	  this.y = y;
-	}
+	        case "end":
+	          delete gestures[identifier], --active;
+	        // nobreak
 
-	Transform.prototype = {
-	  constructor: Transform,
-	  scale: function(k) {
-	    return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
-	  },
-	  translate: function(x, y) {
-	    return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
-	  },
-	  apply: function(point) {
-	    return [point[0] * this.k + this.x, point[1] * this.k + this.y];
-	  },
-	  applyX: function(x) {
-	    return x * this.k + this.x;
-	  },
-	  applyY: function(y) {
-	    return y * this.k + this.y;
-	  },
-	  invert: function(location) {
-	    return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
-	  },
-	  invertX: function(x) {
-	    return (x - this.x) / this.k;
-	  },
-	  invertY: function(y) {
-	    return (y - this.y) / this.k;
-	  },
-	  rescaleX: function(x) {
-	    return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
-	  },
-	  rescaleY: function(y) {
-	    return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
-	  },
-	  toString: function() {
-	    return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
+	        case "drag":
+	          p = pointer(touch || event, container), n = active;
+	          break;
+	      }
+
+	      dispatch.call(type, that, new DragEvent(type, {
+	        sourceEvent: event,
+	        subject: s,
+	        target: drag,
+	        identifier: identifier,
+	        active: n,
+	        x: p[0] + dx,
+	        y: p[1] + dy,
+	        dx: p[0] - p0[0],
+	        dy: p[1] - p0[1],
+	        dispatch: dispatch
+	      }), d);
+	    };
 	  }
-	};
 
-	var identity$2 = new Transform(1, 0, 0);
+	  drag.filter = function (_) {
+	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$1(!!_), drag) : filter;
+	  };
 
-	function nopropagation$1() {
-	  event.stopImmediatePropagation();
-	}
+	  drag.container = function (_) {
+	    return arguments.length ? (container = typeof _ === "function" ? _ : constant$1(_), drag) : container;
+	  };
 
-	function noevent$1() {
-	  event.preventDefault();
-	  event.stopImmediatePropagation();
-	}
+	  drag.subject = function (_) {
+	    return arguments.length ? (subject = typeof _ === "function" ? _ : constant$1(_), drag) : subject;
+	  };
 
-	// Ignore right-click, since that should open the context menu.
-	function defaultFilter$1() {
-	  return !event.ctrlKey && !event.button;
-	}
+	  drag.touchable = function (_) {
+	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$1(!!_), drag) : touchable;
+	  };
 
-	function defaultExtent() {
-	  var e = this;
-	  if (e instanceof SVGElement) {
-	    e = e.ownerSVGElement || e;
-	    if (e.hasAttribute("viewBox")) {
-	      e = e.viewBox.baseVal;
-	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
-	    }
-	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
-	  }
-	  return [[0, 0], [e.clientWidth, e.clientHeight]];
-	}
+	  drag.on = function () {
+	    var value = listeners.on.apply(listeners, arguments);
+	    return value === listeners ? drag : value;
+	  };
 
-	function defaultTransform() {
-	  return this.__zoom || identity$2;
-	}
+	  drag.clickDistance = function (_) {
+	    return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
+	  };
 
-	function defaultWheelDelta() {
-	  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002);
+	  return drag;
 	}
 
-	function defaultTouchable$1() {
-	  return navigator.maxTouchPoints || ("ontouchstart" in this);
-	}
+	var defineProperty$9 = objectDefineProperty.f;
+	var getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
 
-	function defaultConstrain(transform, extent, translateExtent) {
-	  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
-	      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
-	      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
-	      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
-	  return transform.translate(
-	    dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
-	    dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
-	  );
-	}
-
-	function d3_zoom() {
-	  var filter = defaultFilter$1,
-	      extent = defaultExtent,
-	      constrain = defaultConstrain,
-	      wheelDelta = defaultWheelDelta,
-	      touchable = defaultTouchable$1,
-	      scaleExtent = [0, Infinity],
-	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
-	      duration = 250,
-	      interpolate = interpolateZoom,
-	      listeners = dispatch("start", "zoom", "end"),
-	      touchstarting,
-	      touchending,
-	      touchDelay = 500,
-	      wheelDelay = 150,
-	      clickDistance2 = 0;
 
-	  function zoom(selection) {
-	    selection
-	        .property("__zoom", defaultTransform)
-	        .on("wheel.zoom", wheeled)
-	        .on("mousedown.zoom", mousedowned)
-	        .on("dblclick.zoom", dblclicked)
-	      .filter(touchable)
-	        .on("touchstart.zoom", touchstarted)
-	        .on("touchmove.zoom", touchmoved)
-	        .on("touchend.zoom touchcancel.zoom", touchended)
-	        .style("touch-action", "none")
-	        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
-	  }
-
-	  zoom.transform = function(collection, transform, point) {
-	    var selection = collection.selection ? collection.selection() : collection;
-	    selection.property("__zoom", defaultTransform);
-	    if (collection !== selection) {
-	      schedule(collection, transform, point);
-	    } else {
-	      selection.interrupt().each(function() {
-	        gesture(this, arguments)
-	            .start()
-	            .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform)
-	            .end();
-	      });
-	    }
-	  };
 
-	  zoom.scaleBy = function(selection, k, p) {
-	    zoom.scaleTo(selection, function() {
-	      var k0 = this.__zoom.k,
-	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
-	      return k0 * k1;
-	    }, p);
-	  };
 
-	  zoom.scaleTo = function(selection, k, p) {
-	    zoom.transform(selection, function() {
-	      var e = extent.apply(this, arguments),
-	          t0 = this.__zoom,
-	          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
-	          p1 = t0.invert(p0),
-	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
-	      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
-	    }, p);
-	  };
 
-	  zoom.translateBy = function(selection, x, y) {
-	    zoom.transform(selection, function() {
-	      return constrain(this.__zoom.translate(
-	        typeof x === "function" ? x.apply(this, arguments) : x,
-	        typeof y === "function" ? y.apply(this, arguments) : y
-	      ), extent.apply(this, arguments), translateExtent);
-	    });
-	  };
+	var setInternalState$8 = internalState.set;
 
-	  zoom.translateTo = function(selection, x, y, p) {
-	    zoom.transform(selection, function() {
-	      var e = extent.apply(this, arguments),
-	          t = this.__zoom,
-	          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
-	      return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(
-	        typeof x === "function" ? -x.apply(this, arguments) : -x,
-	        typeof y === "function" ? -y.apply(this, arguments) : -y
-	      ), e, translateExtent);
-	    }, p);
-	  };
 
-	  function scale(transform, k) {
-	    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
-	    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
-	  }
 
-	  function translate(transform, p0, p1) {
-	    var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
-	    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
-	  }
+	var MATCH$1 = wellKnownSymbol('match');
+	var NativeRegExp = global_1.RegExp;
+	var RegExpPrototype$1 = NativeRegExp.prototype;
+	var re1 = /a/g;
+	var re2 = /a/g;
 
-	  function centroid(extent) {
-	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
-	  }
+	// "new" should create a new object, old webkit bug
+	var CORRECT_NEW = new NativeRegExp(re1) !== re1;
 
-	  function schedule(transition, transform, point) {
-	    transition
-	        .on("start.zoom", function() { gesture(this, arguments).start(); })
-	        .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); })
-	        .tween("zoom", function() {
-	          var that = this,
-	              args = arguments,
-	              g = gesture(that, args),
-	              e = extent.apply(that, args),
-	              p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
-	              w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
-	              a = that.__zoom,
-	              b = typeof transform === "function" ? transform.apply(that, args) : transform,
-	              i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
-	          return function(t) {
-	            if (t === 1) { t = b; } // Avoid rounding error on end.
-	            else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
-	            g.zoom(null, t);
-	          };
-	        });
-	  }
+	var UNSUPPORTED_Y$2 = regexpStickyHelpers.UNSUPPORTED_Y;
 
-	  function gesture(that, args, clean) {
-	    return (!clean && that.__zooming) || new Gesture(that, args);
-	  }
+	var FORCED$b = descriptors && isForced_1('RegExp', (!CORRECT_NEW || UNSUPPORTED_Y$2 || fails(function () {
+	  re2[MATCH$1] = false;
+	  // RegExp constructor can alter flags and IsRegExp works correct with @@match
+	  return NativeRegExp(re1) != re1 || NativeRegExp(re2) == re2 || NativeRegExp(re1, 'i') != '/a/i';
+	})));
 
-	  function Gesture(that, args) {
-	    this.that = that;
-	    this.args = args;
-	    this.active = 0;
-	    this.extent = extent.apply(that, args);
-	    this.taps = 0;
-	  }
+	// `RegExp` constructor
+	// https://tc39.github.io/ecma262/#sec-regexp-constructor
+	if (FORCED$b) {
+	  var RegExpWrapper = function RegExp(pattern, flags) {
+	    var thisIsRegExp = this instanceof RegExpWrapper;
+	    var patternIsRegExp = isRegexp(pattern);
+	    var flagsAreUndefined = flags === undefined;
+	    var sticky;
 
-	  Gesture.prototype = {
-	    start: function() {
-	      if (++this.active === 1) {
-	        this.that.__zooming = this;
-	        this.emit("start");
-	      }
-	      return this;
-	    },
-	    zoom: function(key, transform) {
-	      if (this.mouse && key !== "mouse") { this.mouse[1] = transform.invert(this.mouse[0]); }
-	      if (this.touch0 && key !== "touch") { this.touch0[1] = transform.invert(this.touch0[0]); }
-	      if (this.touch1 && key !== "touch") { this.touch1[1] = transform.invert(this.touch1[0]); }
-	      this.that.__zoom = transform;
-	      this.emit("zoom");
-	      return this;
-	    },
-	    end: function() {
-	      if (--this.active === 0) {
-	        delete this.that.__zooming;
-	        this.emit("end");
-	      }
-	      return this;
-	    },
-	    emit: function(type) {
-	      customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]);
+	    if (!thisIsRegExp && patternIsRegExp && pattern.constructor === RegExpWrapper && flagsAreUndefined) {
+	      return pattern;
 	    }
-	  };
-
-	  function wheeled() {
-	    if (!filter.apply(this, arguments)) { return; }
-	    var g = gesture(this, arguments),
-	        t = this.__zoom,
-	        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
-	        p = mouse(this);
 
-	    // If the mouse is in the same location as before, reuse it.
-	    // If there were recent wheel events, reset the wheel idle timeout.
-	    if (g.wheel) {
-	      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
-	        g.mouse[1] = t.invert(g.mouse[0] = p);
-	      }
-	      clearTimeout(g.wheel);
+	    if (CORRECT_NEW) {
+	      if (patternIsRegExp && !flagsAreUndefined) pattern = pattern.source;
+	    } else if (pattern instanceof RegExpWrapper) {
+	      if (flagsAreUndefined) flags = regexpFlags.call(pattern);
+	      pattern = pattern.source;
 	    }
 
-	    // If this wheel event won’t trigger a transform change, ignore it.
-	    else if (t.k === k) { return; }
-
-	    // Otherwise, capture the mouse point and location at the start.
-	    else {
-	      g.mouse = [p, t.invert(p)];
-	      interrupt(this);
-	      g.start();
+	    if (UNSUPPORTED_Y$2) {
+	      sticky = !!flags && flags.indexOf('y') > -1;
+	      if (sticky) flags = flags.replace(/y/g, '');
 	    }
 
-	    noevent$1();
-	    g.wheel = setTimeout(wheelidled, wheelDelay);
-	    g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+	    var result = inheritIfRequired(
+	      CORRECT_NEW ? new NativeRegExp(pattern, flags) : NativeRegExp(pattern, flags),
+	      thisIsRegExp ? this : RegExpPrototype$1,
+	      RegExpWrapper
+	    );
 
-	    function wheelidled() {
-	      g.wheel = null;
-	      g.end();
-	    }
-	  }
+	    if (UNSUPPORTED_Y$2 && sticky) setInternalState$8(result, { sticky: sticky });
 
-	  function mousedowned() {
-	    if (touchending || !filter.apply(this, arguments)) { return; }
-	    var g = gesture(this, arguments, true),
-	        v = select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
-	        p = mouse(this),
-	        x0 = event.clientX,
-	        y0 = event.clientY;
+	    return result;
+	  };
+	  var proxy = function (key) {
+	    key in RegExpWrapper || defineProperty$9(RegExpWrapper, key, {
+	      configurable: true,
+	      get: function () { return NativeRegExp[key]; },
+	      set: function (it) { NativeRegExp[key] = it; }
+	    });
+	  };
+	  var keys$2 = getOwnPropertyNames$1(NativeRegExp);
+	  var index = 0;
+	  while (keys$2.length > index) proxy(keys$2[index++]);
+	  RegExpPrototype$1.constructor = RegExpWrapper;
+	  RegExpWrapper.prototype = RegExpPrototype$1;
+	  redefine(global_1, 'RegExp', RegExpWrapper);
+	}
 
-	    dragDisable(event.view);
-	    nopropagation$1();
-	    g.mouse = [p, this.__zoom.invert(p)];
-	    interrupt(this);
-	    g.start();
+	// https://tc39.github.io/ecma262/#sec-get-regexp-@@species
+	setSpecies('RegExp');
 
-	    function mousemoved() {
-	      noevent$1();
-	      if (!g.moved) {
-	        var dx = event.clientX - x0, dy = event.clientY - y0;
-	        g.moved = dx * dx + dy * dy > clickDistance2;
-	      }
-	      g.zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent, translateExtent));
-	    }
+	function define (constructor, factory, prototype) {
+	  constructor.prototype = factory.prototype = prototype;
+	  prototype.constructor = constructor;
+	}
+	function extend(parent, definition) {
+	  var prototype = Object.create(parent.prototype);
 
-	    function mouseupped() {
-	      v.on("mousemove.zoom mouseup.zoom", null);
-	      yesdrag(event.view, g.moved);
-	      noevent$1();
-	      g.end();
-	    }
+	  for (var key in definition) {
+	    prototype[key] = definition[key];
 	  }
 
-	  function dblclicked() {
-	    if (!filter.apply(this, arguments)) { return; }
-	    var t0 = this.__zoom,
-	        p0 = mouse(this),
-	        p1 = t0.invert(p0),
-	        k1 = t0.k * (event.shiftKey ? 0.5 : 2),
-	        t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments), translateExtent);
+	  return prototype;
+	}
 
-	    noevent$1();
-	    if (duration > 0) { select(this).transition().duration(duration).call(schedule, t1, p0); }
-	    else { select(this).call(zoom.transform, t1); }
-	  }
+	function Color() {}
+	var _darker = 0.7;
 
-	  function touchstarted() {
-	    if (!filter.apply(this, arguments)) { return; }
-	    var touches = event.touches,
-	        n = touches.length,
-	        g = gesture(this, arguments, event.changedTouches.length === n),
-	        started, i, t, p;
+	var _brighter = 1 / _darker;
+	var reI = "\\s*([+-]?\\d+)\\s*",
+	    reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
+	    reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
+	    reHex = /^#([0-9a-f]{3,8})$/,
+	    reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
+	    reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
+	    reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
+	    reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
+	    reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
+	    reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
+	var named = {
+	  aliceblue: 0xf0f8ff,
+	  antiquewhite: 0xfaebd7,
+	  aqua: 0x00ffff,
+	  aquamarine: 0x7fffd4,
+	  azure: 0xf0ffff,
+	  beige: 0xf5f5dc,
+	  bisque: 0xffe4c4,
+	  black: 0x000000,
+	  blanchedalmond: 0xffebcd,
+	  blue: 0x0000ff,
+	  blueviolet: 0x8a2be2,
+	  brown: 0xa52a2a,
+	  burlywood: 0xdeb887,
+	  cadetblue: 0x5f9ea0,
+	  chartreuse: 0x7fff00,
+	  chocolate: 0xd2691e,
+	  coral: 0xff7f50,
+	  cornflowerblue: 0x6495ed,
+	  cornsilk: 0xfff8dc,
+	  crimson: 0xdc143c,
+	  cyan: 0x00ffff,
+	  darkblue: 0x00008b,
+	  darkcyan: 0x008b8b,
+	  darkgoldenrod: 0xb8860b,
+	  darkgray: 0xa9a9a9,
+	  darkgreen: 0x006400,
+	  darkgrey: 0xa9a9a9,
+	  darkkhaki: 0xbdb76b,
+	  darkmagenta: 0x8b008b,
+	  darkolivegreen: 0x556b2f,
+	  darkorange: 0xff8c00,
+	  darkorchid: 0x9932cc,
+	  darkred: 0x8b0000,
+	  darksalmon: 0xe9967a,
+	  darkseagreen: 0x8fbc8f,
+	  darkslateblue: 0x483d8b,
+	  darkslategray: 0x2f4f4f,
+	  darkslategrey: 0x2f4f4f,
+	  darkturquoise: 0x00ced1,
+	  darkviolet: 0x9400d3,
+	  deeppink: 0xff1493,
+	  deepskyblue: 0x00bfff,
+	  dimgray: 0x696969,
+	  dimgrey: 0x696969,
+	  dodgerblue: 0x1e90ff,
+	  firebrick: 0xb22222,
+	  floralwhite: 0xfffaf0,
+	  forestgreen: 0x228b22,
+	  fuchsia: 0xff00ff,
+	  gainsboro: 0xdcdcdc,
+	  ghostwhite: 0xf8f8ff,
+	  gold: 0xffd700,
+	  goldenrod: 0xdaa520,
+	  gray: 0x808080,
+	  green: 0x008000,
+	  greenyellow: 0xadff2f,
+	  grey: 0x808080,
+	  honeydew: 0xf0fff0,
+	  hotpink: 0xff69b4,
+	  indianred: 0xcd5c5c,
+	  indigo: 0x4b0082,
+	  ivory: 0xfffff0,
+	  khaki: 0xf0e68c,
+	  lavender: 0xe6e6fa,
+	  lavenderblush: 0xfff0f5,
+	  lawngreen: 0x7cfc00,
+	  lemonchiffon: 0xfffacd,
+	  lightblue: 0xadd8e6,
+	  lightcoral: 0xf08080,
+	  lightcyan: 0xe0ffff,
+	  lightgoldenrodyellow: 0xfafad2,
+	  lightgray: 0xd3d3d3,
+	  lightgreen: 0x90ee90,
+	  lightgrey: 0xd3d3d3,
+	  lightpink: 0xffb6c1,
+	  lightsalmon: 0xffa07a,
+	  lightseagreen: 0x20b2aa,
+	  lightskyblue: 0x87cefa,
+	  lightslategray: 0x778899,
+	  lightslategrey: 0x778899,
+	  lightsteelblue: 0xb0c4de,
+	  lightyellow: 0xffffe0,
+	  lime: 0x00ff00,
+	  limegreen: 0x32cd32,
+	  linen: 0xfaf0e6,
+	  magenta: 0xff00ff,
+	  maroon: 0x800000,
+	  mediumaquamarine: 0x66cdaa,
+	  mediumblue: 0x0000cd,
+	  mediumorchid: 0xba55d3,
+	  mediumpurple: 0x9370db,
+	  mediumseagreen: 0x3cb371,
+	  mediumslateblue: 0x7b68ee,
+	  mediumspringgreen: 0x00fa9a,
+	  mediumturquoise: 0x48d1cc,
+	  mediumvioletred: 0xc71585,
+	  midnightblue: 0x191970,
+	  mintcream: 0xf5fffa,
+	  mistyrose: 0xffe4e1,
+	  moccasin: 0xffe4b5,
+	  navajowhite: 0xffdead,
+	  navy: 0x000080,
+	  oldlace: 0xfdf5e6,
+	  olive: 0x808000,
+	  olivedrab: 0x6b8e23,
+	  orange: 0xffa500,
+	  orangered: 0xff4500,
+	  orchid: 0xda70d6,
+	  palegoldenrod: 0xeee8aa,
+	  palegreen: 0x98fb98,
+	  paleturquoise: 0xafeeee,
+	  palevioletred: 0xdb7093,
+	  papayawhip: 0xffefd5,
+	  peachpuff: 0xffdab9,
+	  peru: 0xcd853f,
+	  pink: 0xffc0cb,
+	  plum: 0xdda0dd,
+	  powderblue: 0xb0e0e6,
+	  purple: 0x800080,
+	  rebeccapurple: 0x663399,
+	  red: 0xff0000,
+	  rosybrown: 0xbc8f8f,
+	  royalblue: 0x4169e1,
+	  saddlebrown: 0x8b4513,
+	  salmon: 0xfa8072,
+	  sandybrown: 0xf4a460,
+	  seagreen: 0x2e8b57,
+	  seashell: 0xfff5ee,
+	  sienna: 0xa0522d,
+	  silver: 0xc0c0c0,
+	  skyblue: 0x87ceeb,
+	  slateblue: 0x6a5acd,
+	  slategray: 0x708090,
+	  slategrey: 0x708090,
+	  snow: 0xfffafa,
+	  springgreen: 0x00ff7f,
+	  steelblue: 0x4682b4,
+	  tan: 0xd2b48c,
+	  teal: 0x008080,
+	  thistle: 0xd8bfd8,
+	  tomato: 0xff6347,
+	  turquoise: 0x40e0d0,
+	  violet: 0xee82ee,
+	  wheat: 0xf5deb3,
+	  white: 0xffffff,
+	  whitesmoke: 0xf5f5f5,
+	  yellow: 0xffff00,
+	  yellowgreen: 0x9acd32
+	};
+	define(Color, color, {
+	  copy: function copy(channels) {
+	    return Object.assign(new this.constructor(), this, channels);
+	  },
+	  displayable: function displayable() {
+	    return this.rgb().displayable();
+	  },
+	  hex: color_formatHex,
+	  // Deprecated! Use color.formatHex.
+	  formatHex: color_formatHex,
+	  formatHsl: color_formatHsl,
+	  formatRgb: color_formatRgb,
+	  toString: color_formatRgb
+	});
 
-	    nopropagation$1();
-	    for (i = 0; i < n; ++i) {
-	      t = touches[i], p = touch(this, touches, t.identifier);
-	      p = [p, this.__zoom.invert(p), t.identifier];
-	      if (!g.touch0) { g.touch0 = p, started = true, g.taps = 1 + !!touchstarting; }
-	      else if (!g.touch1 && g.touch0[2] !== p[2]) { g.touch1 = p, g.taps = 0; }
-	    }
+	function color_formatHex() {
+	  return this.rgb().formatHex();
+	}
 
-	    if (touchstarting) { touchstarting = clearTimeout(touchstarting); }
+	function color_formatHsl() {
+	  return hslConvert(this).formatHsl();
+	}
 
-	    if (started) {
-	      if (g.taps < 2) { touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay); }
-	      interrupt(this);
-	      g.start();
-	    }
-	  }
+	function color_formatRgb() {
+	  return this.rgb().formatRgb();
+	}
 
-	  function touchmoved() {
-	    if (!this.__zooming) { return; }
-	    var g = gesture(this, arguments),
-	        touches = event.changedTouches,
-	        n = touches.length, i, t, p, l;
+	function color(format) {
+	  var m, l;
+	  format = (format + "").trim().toLowerCase();
+	  return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000
+	  : l === 3 ? new Rgb(m >> 8 & 0xf | m >> 4 & 0xf0, m >> 4 & 0xf | m & 0xf0, (m & 0xf) << 4 | m & 0xf, 1) // #f00
+	  : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
+	  : l === 4 ? rgba(m >> 12 & 0xf | m >> 8 & 0xf0, m >> 8 & 0xf | m >> 4 & 0xf0, m >> 4 & 0xf | m & 0xf0, ((m & 0xf) << 4 | m & 0xf) / 0xff) // #f000
+	  : null // invalid hex
+	  ) : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
+	  : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
+	  : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
+	  : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
+	  : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
+	  : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
+	  : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins
+	  : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0) : null;
+	}
 
-	    noevent$1();
-	    if (touchstarting) { touchstarting = clearTimeout(touchstarting); }
-	    g.taps = 0;
-	    for (i = 0; i < n; ++i) {
-	      t = touches[i], p = touch(this, touches, t.identifier);
-	      if (g.touch0 && g.touch0[2] === t.identifier) { g.touch0[0] = p; }
-	      else if (g.touch1 && g.touch1[2] === t.identifier) { g.touch1[0] = p; }
-	    }
-	    t = g.that.__zoom;
-	    if (g.touch1) {
-	      var p0 = g.touch0[0], l0 = g.touch0[1],
-	          p1 = g.touch1[0], l1 = g.touch1[1],
-	          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
-	          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
-	      t = scale(t, Math.sqrt(dp / dl));
-	      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
-	      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
-	    }
-	    else if (g.touch0) { p = g.touch0[0], l = g.touch0[1]; }
-	    else { return; }
-	    g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
-	  }
+	function rgbn(n) {
+	  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
+	}
 
-	  function touchended() {
-	    if (!this.__zooming) { return; }
-	    var g = gesture(this, arguments),
-	        touches = event.changedTouches,
-	        n = touches.length, i, t;
+	function rgba(r, g, b, a) {
+	  if (a <= 0) r = g = b = NaN;
+	  return new Rgb(r, g, b, a);
+	}
 
-	    nopropagation$1();
-	    if (touchending) { clearTimeout(touchending); }
-	    touchending = setTimeout(function() { touchending = null; }, touchDelay);
-	    for (i = 0; i < n; ++i) {
-	      t = touches[i];
-	      if (g.touch0 && g.touch0[2] === t.identifier) { delete g.touch0; }
-	      else if (g.touch1 && g.touch1[2] === t.identifier) { delete g.touch1; }
-	    }
-	    if (g.touch1 && !g.touch0) { g.touch0 = g.touch1, delete g.touch1; }
-	    if (g.touch0) { g.touch0[1] = this.__zoom.invert(g.touch0[0]); }
-	    else {
-	      g.end();
-	      // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.
-	      if (g.taps === 2) {
-	        var p = select(this).on("dblclick.zoom");
-	        if (p) { p.apply(this, arguments); }
-	      }
-	    }
-	  }
+	function rgbConvert(o) {
+	  if (!(o instanceof Color)) o = color(o);
+	  if (!o) return new Rgb();
+	  o = o.rgb();
+	  return new Rgb(o.r, o.g, o.b, o.opacity);
+	}
+	function rgb(r, g, b, opacity) {
+	  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
+	}
+	function Rgb(r, g, b, opacity) {
+	  this.r = +r;
+	  this.g = +g;
+	  this.b = +b;
+	  this.opacity = +opacity;
+	}
+	define(Rgb, rgb, extend(Color, {
+	  brighter: function brighter(k) {
+	    k = k == null ? _brighter : Math.pow(_brighter, k);
+	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+	  },
+	  darker: function darker(k) {
+	    k = k == null ? _darker : Math.pow(_darker, k);
+	    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+	  },
+	  rgb: function rgb() {
+	    return this;
+	  },
+	  displayable: function displayable() {
+	    return -0.5 <= this.r && this.r < 255.5 && -0.5 <= this.g && this.g < 255.5 && -0.5 <= this.b && this.b < 255.5 && 0 <= this.opacity && this.opacity <= 1;
+	  },
+	  hex: rgb_formatHex,
+	  // Deprecated! Use color.formatHex.
+	  formatHex: rgb_formatHex,
+	  formatRgb: rgb_formatRgb,
+	  toString: rgb_formatRgb
+	}));
 
-	  zoom.wheelDelta = function(_) {
-	    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$3(+_), zoom) : wheelDelta;
-	  };
+	function rgb_formatHex() {
+	  return "#" + hex$2(this.r) + hex$2(this.g) + hex$2(this.b);
+	}
 
-	  zoom.filter = function(_) {
-	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$3(!!_), zoom) : filter;
-	  };
+	function rgb_formatRgb() {
+	  var a = this.opacity;
+	  a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+	  return (a === 1 ? "rgb(" : "rgba(") + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.b) || 0)) + (a === 1 ? ")" : ", " + a + ")");
+	}
 
-	  zoom.touchable = function(_) {
-	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$3(!!_), zoom) : touchable;
-	  };
+	function hex$2(value) {
+	  value = Math.max(0, Math.min(255, Math.round(value) || 0));
+	  return (value < 16 ? "0" : "") + value.toString(16);
+	}
 
-	  zoom.extent = function(_) {
-	    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$3([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
-	  };
+	function hsla(h, s, l, a) {
+	  if (a <= 0) h = s = l = NaN;else if (l <= 0 || l >= 1) h = s = NaN;else if (s <= 0) h = NaN;
+	  return new Hsl(h, s, l, a);
+	}
 
-	  zoom.scaleExtent = function(_) {
-	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
-	  };
+	function hslConvert(o) {
+	  if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
+	  if (!(o instanceof Color)) o = color(o);
+	  if (!o) return new Hsl();
+	  if (o instanceof Hsl) return o;
+	  o = o.rgb();
+	  var r = o.r / 255,
+	      g = o.g / 255,
+	      b = o.b / 255,
+	      min = Math.min(r, g, b),
+	      max = Math.max(r, g, b),
+	      h = NaN,
+	      s = max - min,
+	      l = (max + min) / 2;
 
-	  zoom.translateExtent = function(_) {
-	    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
-	  };
+	  if (s) {
+	    if (r === max) h = (g - b) / s + (g < b) * 6;else if (g === max) h = (b - r) / s + 2;else h = (r - g) / s + 4;
+	    s /= l < 0.5 ? max + min : 2 - max - min;
+	    h *= 60;
+	  } else {
+	    s = l > 0 && l < 1 ? 0 : h;
+	  }
 
-	  zoom.constrain = function(_) {
-	    return arguments.length ? (constrain = _, zoom) : constrain;
-	  };
+	  return new Hsl(h, s, l, o.opacity);
+	}
+	function hsl(h, s, l, opacity) {
+	  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
+	}
 
-	  zoom.duration = function(_) {
-	    return arguments.length ? (duration = +_, zoom) : duration;
-	  };
+	function Hsl(h, s, l, opacity) {
+	  this.h = +h;
+	  this.s = +s;
+	  this.l = +l;
+	  this.opacity = +opacity;
+	}
 
-	  zoom.interpolate = function(_) {
-	    return arguments.length ? (interpolate = _, zoom) : interpolate;
-	  };
+	define(Hsl, hsl, extend(Color, {
+	  brighter: function brighter(k) {
+	    k = k == null ? _brighter : Math.pow(_brighter, k);
+	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
+	  },
+	  darker: function darker(k) {
+	    k = k == null ? _darker : Math.pow(_darker, k);
+	    return new Hsl(this.h, this.s, this.l * k, this.opacity);
+	  },
+	  rgb: function rgb() {
+	    var h = this.h % 360 + (this.h < 0) * 360,
+	        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
+	        l = this.l,
+	        m2 = l + (l < 0.5 ? l : 1 - l) * s,
+	        m1 = 2 * l - m2;
+	    return new Rgb(hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2), hsl2rgb(h, m1, m2), hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2), this.opacity);
+	  },
+	  displayable: function displayable() {
+	    return (0 <= this.s && this.s <= 1 || isNaN(this.s)) && 0 <= this.l && this.l <= 1 && 0 <= this.opacity && this.opacity <= 1;
+	  },
+	  formatHsl: function formatHsl() {
+	    var a = this.opacity;
+	    a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+	    return (a === 1 ? "hsl(" : "hsla(") + (this.h || 0) + ", " + (this.s || 0) * 100 + "%, " + (this.l || 0) * 100 + "%" + (a === 1 ? ")" : ", " + a + ")");
+	  }
+	}));
+	/* From FvD 13.37, CSS Color Module Level 3 */
 
-	  zoom.on = function() {
-	    var value = listeners.on.apply(listeners, arguments);
-	    return value === listeners ? zoom : value;
+	function hsl2rgb(h, m1, m2) {
+	  return (h < 60 ? m1 + (m2 - m1) * h / 60 : h < 180 ? m2 : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60 : m1) * 255;
+	}
+
+	var constant$2 = (function (x) {
+	  return function () {
+	    return x;
 	  };
+	});
 
-	  zoom.clickDistance = function(_) {
-	    return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+	function linear(a, d) {
+	  return function (t) {
+	    return a + t * d;
 	  };
+	}
 
-	  return zoom;
+	function exponential(a, b, y) {
+	  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function (t) {
+	    return Math.pow(a + t * b, y);
+	  };
+	}
+	function gamma(y) {
+	  return (y = +y) === 1 ? nogamma : function (a, b) {
+	    return b - a ? exponential(a, b, y) : constant$2(isNaN(a) ? b : a);
+	  };
+	}
+	function nogamma(a, b) {
+	  var d = b - a;
+	  return d ? linear(a, d) : constant$2(isNaN(a) ? b : a);
 	}
 
-	/*
-	    Bypasses features of D3's default projection stream pipeline that are unnecessary:
-	    * Antimeridian clipping
-	    * Spherical rotation
-	    * Resampling
-	*/
-	function geoRawMercator() {
-	    var project = mercatorRaw;
-	    var k = 512 / Math.PI; // scale
-	    var x = 0;
-	    var y = 0; // translate
-	    var clipExtent = [[0, 0], [0, 0]];
+	var d3_interpolateRgb = (function rgbGamma(y) {
+	  var color = gamma(y);
 
+	  function rgb$1(start, end) {
+	    var r = color((start = rgb(start)).r, (end = rgb(end)).r),
+	        g = color(start.g, end.g),
+	        b = color(start.b, end.b),
+	        opacity = nogamma(start.opacity, end.opacity);
+	    return function (t) {
+	      start.r = r(t);
+	      start.g = g(t);
+	      start.b = b(t);
+	      start.opacity = opacity(t);
+	      return start + "";
+	    };
+	  }
 
-	    function projection(point) {
-	        point = project(point[0] * Math.PI / 180, point[1] * Math.PI / 180);
-	        return [point[0] * k + x, y - point[1] * k];
-	    }
+	  rgb$1.gamma = rgbGamma;
+	  return rgb$1;
+	})(1);
 
+	function numberArray (a, b) {
+	  if (!b) b = [];
+	  var n = a ? Math.min(b.length, a.length) : 0,
+	      c = b.slice(),
+	      i;
+	  return function (t) {
+	    for (i = 0; i < n; ++i) {
+	      c[i] = a[i] * (1 - t) + b[i] * t;
+	    }
 
-	    projection.invert = function(point) {
-	        point = project.invert((point[0] - x) / k, (y - point[1]) / k);
-	        return point && [point[0] * 180 / Math.PI, point[1] * 180 / Math.PI];
-	    };
+	    return c;
+	  };
+	}
+	function isNumberArray(x) {
+	  return ArrayBuffer.isView(x) && !(x instanceof DataView);
+	}
 
+	function genericArray(a, b) {
+	  var nb = b ? b.length : 0,
+	      na = a ? Math.min(nb, a.length) : 0,
+	      x = new Array(na),
+	      c = new Array(nb),
+	      i;
 
-	    projection.scale = function(_) {
-	        if (!arguments.length) { return k; }
-	        k = +_;
-	        return projection;
-	    };
+	  for (i = 0; i < na; ++i) {
+	    x[i] = interpolate(a[i], b[i]);
+	  }
 
+	  for (; i < nb; ++i) {
+	    c[i] = b[i];
+	  }
 
-	    projection.translate = function(_) {
-	        if (!arguments.length) { return [x, y]; }
-	        x = +_[0];
-	        y = +_[1];
-	        return projection;
-	    };
+	  return function (t) {
+	    for (i = 0; i < na; ++i) {
+	      c[i] = x[i](t);
+	    }
 
+	    return c;
+	  };
+	}
 
-	    projection.clipExtent = function(_) {
-	        if (!arguments.length) { return clipExtent; }
-	        clipExtent = _;
-	        return projection;
-	    };
+	function date (a, b) {
+	  var d = new Date();
+	  return a = +a, b = +b, function (t) {
+	    return d.setTime(a * (1 - t) + b * t), d;
+	  };
+	}
 
+	function d3_interpolateNumber (a, b) {
+	  return a = +a, b = +b, function (t) {
+	    return a * (1 - t) + b * t;
+	  };
+	}
 
-	    projection.transform = function(obj) {
-	        if (!arguments.length) { return identity$2.translate(x, y).scale(k); }
-	        x = +obj.x;
-	        y = +obj.y;
-	        k = +obj.k;
-	        return projection;
-	    };
+	function object (a, b) {
+	  var i = {},
+	      c = {},
+	      k;
+	  if (a === null || _typeof(a) !== "object") a = {};
+	  if (b === null || _typeof(b) !== "object") b = {};
 
+	  for (k in b) {
+	    if (k in a) {
+	      i[k] = interpolate(a[k], b[k]);
+	    } else {
+	      c[k] = b[k];
+	    }
+	  }
 
-	    projection.stream = d3_geoTransform({
-	        point: function(x, y) {
-	            var vec = projection([x, y]);
-	            this.stream.point(vec[0], vec[1]);
-	        }
-	    }).stream;
+	  return function (t) {
+	    for (k in i) {
+	      c[k] = i[k](t);
+	    }
+
+	    return c;
+	  };
+	}
 
+	var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
+	    reB = new RegExp(reA.source, "g");
 
-	    return projection;
+	function zero(b) {
+	  return function () {
+	    return b;
+	  };
 	}
 
-	function geoOrthoNormalizedDotProduct(a, b, origin) {
-	    if (geoVecEqual(origin, a) || geoVecEqual(origin, b)) {
-	        return 1;  // coincident points, treat as straight and try to remove
-	    }
-	    return geoVecNormalizedDot(a, b, origin);
+	function one(b) {
+	  return function (t) {
+	    return b(t) + "";
+	  };
 	}
 
+	function interpolateString (a, b) {
+	  var bi = reA.lastIndex = reB.lastIndex = 0,
+	      // scan index for next number in b
+	  am,
+	      // current match in a
+	  bm,
+	      // current match in b
+	  bs,
+	      // string preceding current number in b, if any
+	  i = -1,
+	      // index in s
+	  s = [],
+	      // string constants and placeholders
+	  q = []; // number interpolators
+	  // Coerce inputs to strings.
 
-	function geoOrthoFilterDotProduct(dotp, epsilon, lowerThreshold, upperThreshold, allowStraightAngles) {
-	    var val = Math.abs(dotp);
-	    if (val < epsilon) {
-	        return 0;      // already orthogonal
-	    } else if (allowStraightAngles && Math.abs(val-1) < epsilon) {
-	        return 0;      // straight angle, which is okay in this case
-	    } else if (val < lowerThreshold || val > upperThreshold) {
-	        return dotp;   // can be adjusted
+	  a = a + "", b = b + ""; // Interpolate pairs of numbers in a & b.
+
+	  while ((am = reA.exec(a)) && (bm = reB.exec(b))) {
+	    if ((bs = bm.index) > bi) {
+	      // a string precedes the next number in b
+	      bs = b.slice(bi, bs);
+	      if (s[i]) s[i] += bs; // coalesce with previous string
+	      else s[++i] = bs;
+	    }
+
+	    if ((am = am[0]) === (bm = bm[0])) {
+	      // numbers in a & b match
+	      if (s[i]) s[i] += bm; // coalesce with previous string
+	      else s[++i] = bm;
 	    } else {
-	        return null;   // ignore vertex
+	      // interpolate non-matching numbers
+	      s[++i] = null;
+	      q.push({
+	        i: i,
+	        x: d3_interpolateNumber(am, bm)
+	      });
 	    }
-	}
 
+	    bi = reB.lastIndex;
+	  } // Add remains of b.
 
-	function geoOrthoCalcScore(points, isClosed, epsilon, threshold) {
-	    var score = 0;
-	    var first = isClosed ? 0 : 1;
-	    var last = isClosed ? points.length : points.length - 1;
-	    var coords = points.map(function(p) { return p.coord; });
 
-	    var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-	    var upperThreshold = Math.cos(threshold * Math.PI / 180);
+	  if (bi < b.length) {
+	    bs = b.slice(bi);
+	    if (s[i]) s[i] += bs; // coalesce with previous string
+	    else s[++i] = bs;
+	  } // Special optimization for only a single match.
+	  // Otherwise, interpolate each of the numbers and rejoin the string.
 
-	    for (var i = first; i < last; i++) {
-	        var a = coords[(i - 1 + coords.length) % coords.length];
-	        var origin = coords[i];
-	        var b = coords[(i + 1) % coords.length];
 
-	        var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold);
-	        if (dotp === null) { continue; }    // ignore vertex
-	        score = score + 2.0 * Math.min(Math.abs(dotp - 1.0), Math.min(Math.abs(dotp), Math.abs(dotp + 1)));
+	  return s.length < 2 ? q[0] ? one(q[0].x) : zero(b) : (b = q.length, function (t) {
+	    for (var i = 0, o; i < b; ++i) {
+	      s[(o = q[i]).i] = o.x(t);
 	    }
 
-	    return score;
+	    return s.join("");
+	  });
 	}
 
-	// returns the maximum angle less than `lessThan` between the actual corner and a 0° or 90° corner
-	function geoOrthoMaxOffsetAngle(coords, isClosed, lessThan) {
-	    var max = -Infinity;
+	function interpolate (a, b) {
+	  var t = _typeof(b),
+	      c;
 
-	    var first = isClosed ? 0 : 1;
-	    var last = isClosed ? coords.length : coords.length - 1;
+	  return b == null || t === "boolean" ? constant$2(b) : (t === "number" ? d3_interpolateNumber : t === "string" ? (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString : b instanceof color ? d3_interpolateRgb : b instanceof Date ? date : isNumberArray(b) ? numberArray : Array.isArray(b) ? genericArray : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object : d3_interpolateNumber)(a, b);
+	}
 
-	    for (var i = first; i < last; i++) {
-	        var a = coords[(i - 1 + coords.length) % coords.length];
-	        var origin = coords[i];
-	        var b = coords[(i + 1) % coords.length];
-	        var normalizedDotP = geoOrthoNormalizedDotProduct(a, b, origin);
+	function interpolateRound (a, b) {
+	  return a = +a, b = +b, function (t) {
+	    return Math.round(a * (1 - t) + b * t);
+	  };
+	}
+
+	var degrees$1 = 180 / Math.PI;
+	var identity$1 = {
+	  translateX: 0,
+	  translateY: 0,
+	  rotate: 0,
+	  skewX: 0,
+	  scaleX: 1,
+	  scaleY: 1
+	};
+	function decompose (a, b, c, d, e, f) {
+	  var scaleX, scaleY, skewX;
+	  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
+	  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
+	  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
+	  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
+	  return {
+	    translateX: e,
+	    translateY: f,
+	    rotate: Math.atan2(b, a) * degrees$1,
+	    skewX: Math.atan(skewX) * degrees$1,
+	    scaleX: scaleX,
+	    scaleY: scaleY
+	  };
+	}
 
-	        var angle = Math.acos(Math.abs(normalizedDotP)) * 180 / Math.PI;
+	var svgNode;
+	/* eslint-disable no-undef */
 
-	        if (angle > 45) { angle = 90 - angle; }
+	function parseCss(value) {
+	  var m = new (typeof DOMMatrix === "function" ? DOMMatrix : WebKitCSSMatrix)(value + "");
+	  return m.isIdentity ? identity$1 : decompose(m.a, m.b, m.c, m.d, m.e, m.f);
+	}
+	function parseSvg(value) {
+	  if (value == null) return identity$1;
+	  if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
+	  svgNode.setAttribute("transform", value);
+	  if (!(value = svgNode.transform.baseVal.consolidate())) return identity$1;
+	  value = value.matrix;
+	  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+	}
 
-	        if (angle >= lessThan) { continue; }
+	function interpolateTransform(parse, pxComma, pxParen, degParen) {
+	  function pop(s) {
+	    return s.length ? s.pop() + " " : "";
+	  }
 
-	        if (angle > max) { max = angle; }
+	  function translate(xa, ya, xb, yb, s, q) {
+	    if (xa !== xb || ya !== yb) {
+	      var i = s.push("translate(", null, pxComma, null, pxParen);
+	      q.push({
+	        i: i - 4,
+	        x: d3_interpolateNumber(xa, xb)
+	      }, {
+	        i: i - 2,
+	        x: d3_interpolateNumber(ya, yb)
+	      });
+	    } else if (xb || yb) {
+	      s.push("translate(" + xb + pxComma + yb + pxParen);
 	    }
+	  }
 
-	    if (max === -Infinity) { return null; }
-
-	    return max;
-	}
+	  function rotate(a, b, s, q) {
+	    if (a !== b) {
+	      if (a - b > 180) b += 360;else if (b - a > 180) a += 360; // shortest path
 
+	      q.push({
+	        i: s.push(pop(s) + "rotate(", null, degParen) - 2,
+	        x: d3_interpolateNumber(a, b)
+	      });
+	    } else if (b) {
+	      s.push(pop(s) + "rotate(" + b + degParen);
+	    }
+	  }
 
-	// similar to geoOrthoCalcScore, but returns quickly if there is something to do
-	function geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles) {
-	    var score = null;
-	    var first = isClosed ? 0 : 1;
-	    var last = isClosed ? coords.length : coords.length - 1;
+	  function skewX(a, b, s, q) {
+	    if (a !== b) {
+	      q.push({
+	        i: s.push(pop(s) + "skewX(", null, degParen) - 2,
+	        x: d3_interpolateNumber(a, b)
+	      });
+	    } else if (b) {
+	      s.push(pop(s) + "skewX(" + b + degParen);
+	    }
+	  }
 
-	    var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-	    var upperThreshold = Math.cos(threshold * Math.PI / 180);
+	  function scale(xa, ya, xb, yb, s, q) {
+	    if (xa !== xb || ya !== yb) {
+	      var i = s.push(pop(s) + "scale(", null, ",", null, ")");
+	      q.push({
+	        i: i - 4,
+	        x: d3_interpolateNumber(xa, xb)
+	      }, {
+	        i: i - 2,
+	        x: d3_interpolateNumber(ya, yb)
+	      });
+	    } else if (xb !== 1 || yb !== 1) {
+	      s.push(pop(s) + "scale(" + xb + "," + yb + ")");
+	    }
+	  }
 
-	    for (var i = first; i < last; i++) {
-	        var a = coords[(i - 1 + coords.length) % coords.length];
-	        var origin = coords[i];
-	        var b = coords[(i + 1) % coords.length];
+	  return function (a, b) {
+	    var s = [],
+	        // string constants and placeholders
+	    q = []; // number interpolators
 
-	        var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold, allowStraightAngles);
-	        if (dotp === null) { continue; }        // ignore vertex
-	        if (Math.abs(dotp) > 0) { return 1; }   // something to do
-	        score = 0;                          // already square
-	    }
+	    a = parse(a), b = parse(b);
+	    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
+	    rotate(a.rotate, b.rotate, s, q);
+	    skewX(a.skewX, b.skewX, s, q);
+	    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
+	    a = b = null; // gc
 
-	    return score;
-	}
+	    return function (t) {
+	      var i = -1,
+	          n = q.length,
+	          o;
 
-	// Returns true if a and b have the same elements at the same indices.
-	function utilArrayIdentical(a, b) {
-	    // an array is always identical to itself
-	    if (a === b) { return true; }
+	      while (++i < n) {
+	        s[(o = q[i]).i] = o.x(t);
+	      }
 
-	    var i = a.length;
-	    if (i !== b.length) { return false; }
-	    while (i--) {
-	        if (a[i] !== b[i]) { return false; }
-	    }
-	    return true;
+	      return s.join("");
+	    };
+	  };
 	}
 
-	// http://2ality.com/2015/01/es6-set-operations.html
+	var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
+	var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
 
-	// Difference (a \ b): create a set that contains those elements of set a that are not in set b.
-	// This operation is also sometimes called minus (-).
-	// var a = [1,2,3];
-	// var b = [4,3,2];
-	// utilArrayDifference(a, b)
-	//   [1]
-	// utilArrayDifference(b, a)
-	//   [4]
-	function utilArrayDifference(a, b) {
-	    var other = new Set(b);
-	    return Array.from(new Set(a))
-	        .filter(function(v) { return !other.has(v); });
-	}
+	var epsilon2$1 = 1e-12;
 
-	// Intersection (a ∩ b): create a set that contains those elements of set a that are also in set b.
-	// var a = [1,2,3];
-	// var b = [4,3,2];
-	// utilArrayIntersection(a, b)
-	//   [2,3]
-	function utilArrayIntersection(a, b) {
-	    var other = new Set(b);
-	    return Array.from(new Set(a))
-	        .filter(function(v) { return other.has(v); });
+	function cosh(x) {
+	  return ((x = Math.exp(x)) + 1 / x) / 2;
 	}
 
-	// Union (a ∪ b): create a set that contains the elements of both set a and set b.
-	// var a = [1,2,3];
-	// var b = [4,3,2];
-	// utilArrayUnion(a, b)
-	//   [1,2,3,4]
-	function utilArrayUnion(a, b) {
-	    var result = new Set(a);
-	    b.forEach(function(v) { result.add(v); });
-	    return Array.from(result);
+	function sinh(x) {
+	  return ((x = Math.exp(x)) - 1 / x) / 2;
 	}
 
-	// Returns an Array with all the duplicates removed
-	// var a = [1,1,2,3,3];
-	// utilArrayUniq(a)
-	//   [1,2,3]
-	function utilArrayUniq(a) {
-	    return Array.from(new Set(a));
+	function tanh(x) {
+	  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
 	}
 
+	var interpolateZoom = (function zoomRho(rho, rho2, rho4) {
+	  // p0 = [ux0, uy0, w0]
+	  // p1 = [ux1, uy1, w1]
+	  function zoom(p0, p1) {
+	    var ux0 = p0[0],
+	        uy0 = p0[1],
+	        w0 = p0[2],
+	        ux1 = p1[0],
+	        uy1 = p1[1],
+	        w1 = p1[2],
+	        dx = ux1 - ux0,
+	        dy = uy1 - uy0,
+	        d2 = dx * dx + dy * dy,
+	        i,
+	        S; // Special case for u0 ≅ u1.
+
+	    if (d2 < epsilon2$1) {
+	      S = Math.log(w1 / w0) / rho;
+
+	      i = function i(t) {
+	        return [ux0 + t * dx, uy0 + t * dy, w0 * Math.exp(rho * t * S)];
+	      };
+	    } // General case.
+	    else {
+	        var d1 = Math.sqrt(d2),
+	            b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
+	            b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
+	            r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
+	            r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
+	        S = (r1 - r0) / rho;
+
+	        i = function i(t) {
+	          var s = t * S,
+	              coshr0 = cosh(r0),
+	              u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
+	          return [ux0 + u * dx, uy0 + u * dy, w0 * coshr0 / cosh(rho * s + r0)];
+	        };
+	      }
 
-	// Splits array into chunks of given chunk size
-	// var a = [1,2,3,4,5,6,7];
-	// utilArrayChunk(a, 3);
-	//   [[1,2,3],[4,5,6],[7]];
-	function utilArrayChunk(a, chunkSize) {
-	    if (!chunkSize || chunkSize < 0) { return [a.slice()]; }
+	    i.duration = S * 1000 * rho / Math.SQRT2;
+	    return i;
+	  }
 
-	    var result = new Array(Math.ceil(a.length / chunkSize));
-	    return Array.from(result, function(item, i) {
-	        return a.slice(i * chunkSize, i * chunkSize + chunkSize);
-	    });
-	}
+	  zoom.rho = function (_) {
+	    var _1 = Math.max(1e-3, +_),
+	        _2 = _1 * _1,
+	        _4 = _2 * _2;
 
+	    return zoomRho(_1, _2, _4);
+	  };
 
-	// Flattens two level array into a single level
-	// var a = [[1,2,3],[4,5,6],[7]];
-	// utilArrayFlatten(a);
-	//   [1,2,3,4,5,6,7];
-	function utilArrayFlatten(a) {
-	    return a.reduce(function(acc, val) {
-	        return acc.concat(val);
-	    }, []);
+	  return zoom;
+	})(Math.SQRT2, 2, 4);
+
+	function d3_quantize (interpolator, n) {
+	  var samples = new Array(n);
+
+	  for (var i = 0; i < n; ++i) {
+	    samples[i] = interpolator(i / (n - 1));
+	  }
+
+	  return samples;
 	}
 
+	// `Function.prototype.bind` method
+	// https://tc39.github.io/ecma262/#sec-function.prototype.bind
+	_export({ target: 'Function', proto: true }, {
+	  bind: functionBind
+	});
 
-	// Groups the items of the Array according to the given key
-	// `key` can be passed as a property or as a key function
-	//
-	// var pets = [
-	//     { type: 'Dog', name: 'Spot' },
-	//     { type: 'Cat', name: 'Tiger' },
-	//     { type: 'Dog', name: 'Rover' },
-	//     { type: 'Cat', name: 'Leo' }
-	// ];
-	//
-	// utilArrayGroupBy(pets, 'type')
-	//   {
-	//     'Dog': [{type: 'Dog', name: 'Spot'}, {type: 'Dog', name: 'Rover'}],
-	//     'Cat': [{type: 'Cat', name: 'Tiger'}, {type: 'Cat', name: 'Leo'}]
-	//   }
-	//
-	// utilArrayGroupBy(pets, function(item) { return item.name.length; })
-	//   {
-	//     3: [{type: 'Cat', name: 'Leo'}],
-	//     4: [{type: 'Dog', name: 'Spot'}],
-	//     5: [{type: 'Cat', name: 'Tiger'}, {type: 'Dog', name: 'Rover'}]
-	//   }
-	function utilArrayGroupBy(a, key) {
-	    return a.reduce(function(acc, item) {
-	        var group = (typeof key === 'function') ? key(item) : item[key];
-	        (acc[group] = acc[group] || []).push(item);
-	        return acc;
-	    }, {});
+	var frame = 0,
+	    // is an animation frame pending?
+	timeout = 0,
+	    // is a timeout pending?
+	interval = 0,
+	    // are any timers active?
+	pokeDelay = 1000,
+	    // how frequently we check for clock skew
+	taskHead,
+	    taskTail,
+	    clockLast = 0,
+	    clockNow = 0,
+	    clockSkew = 0,
+	    clock = (typeof performance === "undefined" ? "undefined" : _typeof(performance)) === "object" && performance.now ? performance : Date,
+	    setFrame = (typeof window === "undefined" ? "undefined" : _typeof(window)) === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function (f) {
+	  setTimeout(f, 17);
+	};
+	function now() {
+	  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
 	}
 
+	function clearNow() {
+	  clockNow = 0;
+	}
 
-	// Returns an Array with all the duplicates removed
-	// where uniqueness determined by the given key
-	// `key` can be passed as a property or as a key function
-	//
-	// var pets = [
-	//     { type: 'Dog', name: 'Spot' },
-	//     { type: 'Cat', name: 'Tiger' },
-	//     { type: 'Dog', name: 'Rover' },
-	//     { type: 'Cat', name: 'Leo' }
-	// ];
-	//
-	// utilArrayUniqBy(pets, 'type')
-	//   [
-	//     { type: 'Dog', name: 'Spot' },
-	//     { type: 'Cat', name: 'Tiger' }
-	//   ]
-	//
-	// utilArrayUniqBy(pets, function(item) { return item.name.length; })
-	//   [
-	//     { type: 'Dog', name: 'Spot' },
-	//     { type: 'Cat', name: 'Tiger' },
-	//     { type: 'Cat', name: 'Leo' }
-	//   }
-	function utilArrayUniqBy(a, key) {
-	    var seen = new Set();
-	    return a.reduce(function(acc, item) {
-	        var val = (typeof key === 'function') ? key(item) : item[key];
-	        if (val && !seen.has(val)) {
-	            seen.add(val);
-	            acc.push(item);
-	        }
-	        return acc;
-	    }, []);
+	function Timer() {
+	  this._call = this._time = this._next = null;
 	}
+	Timer.prototype = timer.prototype = {
+	  constructor: Timer,
+	  restart: function restart(callback, delay, time) {
+	    if (typeof callback !== "function") throw new TypeError("callback is not a function");
+	    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
 
-	var remove$1 = removeDiacritics;
+	    if (!this._next && taskTail !== this) {
+	      if (taskTail) taskTail._next = this;else taskHead = this;
+	      taskTail = this;
+	    }
 
-	var replacementList = [
-	  {
-	    base: ' ',
-	    chars: "\u00A0",
-	  }, {
-	    base: '0',
-	    chars: "\u07C0",
-	  }, {
-	    base: 'A',
-	    chars: "\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F",
-	  }, {
-	    base: 'AA',
-	    chars: "\uA732",
-	  }, {
-	    base: 'AE',
-	    chars: "\u00C6\u01FC\u01E2",
-	  }, {
-	    base: 'AO',
-	    chars: "\uA734",
-	  }, {
-	    base: 'AU',
-	    chars: "\uA736",
-	  }, {
-	    base: 'AV',
-	    chars: "\uA738\uA73A",
-	  }, {
-	    base: 'AY',
-	    chars: "\uA73C",
-	  }, {
-	    base: 'B',
-	    chars: "\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0181",
-	  }, {
-	    base: 'C',
-	    chars: "\u24b8\uff23\uA73E\u1E08\u0106\u0043\u0108\u010A\u010C\u00C7\u0187\u023B",
-	  }, {
-	    base: 'D',
-	    chars: "\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018A\u0189\u1D05\uA779",
-	  }, {
-	    base: 'Dh',
-	    chars: "\u00D0",
-	  }, {
-	    base: 'DZ',
-	    chars: "\u01F1\u01C4",
-	  }, {
-	    base: 'Dz',
-	    chars: "\u01F2\u01C5",
-	  }, {
-	    base: 'E',
-	    chars: "\u025B\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E\u1D07",
-	  }, {
-	    base: 'F',
-	    chars: "\uA77C\u24BB\uFF26\u1E1E\u0191\uA77B",
-	  }, {
-	    base: 'G',
-	    chars: "\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E\u0262",
-	  }, {
-	    base: 'H',
-	    chars: "\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D",
-	  }, {
-	    base: 'I',
-	    chars: "\u24BE\uFF29\xCC\xCD\xCE\u0128\u012A\u012C\u0130\xCF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197",
-	  }, {
-	    base: 'J',
-	    chars: "\u24BF\uFF2A\u0134\u0248\u0237",
-	  }, {
-	    base: 'K',
-	    chars: "\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2",
-	  }, {
-	    base: 'L',
-	    chars: "\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780",
-	  }, {
-	    base: 'LJ',
-	    chars: "\u01C7",
-	  }, {
-	    base: 'Lj',
-	    chars: "\u01C8",
-	  }, {
-	    base: 'M',
-	    chars: "\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C\u03FB",
-	  }, {
-	    base: 'N',
-	    chars: "\uA7A4\u0220\u24C3\uFF2E\u01F8\u0143\xD1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u019D\uA790\u1D0E",
-	  }, {
-	    base: 'NJ',
-	    chars: "\u01CA",
-	  }, {
-	    base: 'Nj',
-	    chars: "\u01CB",
-	  }, {
-	    base: 'O',
-	    chars: "\u24C4\uFF2F\xD2\xD3\xD4\u1ED2\u1ED0\u1ED6\u1ED4\xD5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\xD6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\xD8\u01FE\u0186\u019F\uA74A\uA74C",
-	  }, {
-	    base: 'OE',
-	    chars: "\u0152",
-	  }, {
-	    base: 'OI',
-	    chars: "\u01A2",
-	  }, {
-	    base: 'OO',
-	    chars: "\uA74E",
-	  }, {
-	    base: 'OU',
-	    chars: "\u0222",
-	  }, {
-	    base: 'P',
-	    chars: "\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754",
-	  }, {
-	    base: 'Q',
-	    chars: "\u24C6\uFF31\uA756\uA758\u024A",
-	  }, {
-	    base: 'R',
-	    chars: "\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782",
-	  }, {
-	    base: 'S',
-	    chars: "\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784",
-	  }, {
-	    base: 'T',
-	    chars: "\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786",
-	  }, {
-	    base: 'Th',
-	    chars: "\u00DE",
-	  }, {
-	    base: 'TZ',
-	    chars: "\uA728",
-	  }, {
-	    base: 'U',
-	    chars: "\u24CA\uFF35\xD9\xDA\xDB\u0168\u1E78\u016A\u1E7A\u016C\xDC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244",
-	  }, {
-	    base: 'V',
-	    chars: "\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245",
-	  }, {
-	    base: 'VY',
-	    chars: "\uA760",
-	  }, {
-	    base: 'W',
-	    chars: "\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72",
-	  }, {
-	    base: 'X',
-	    chars: "\u24CD\uFF38\u1E8A\u1E8C",
-	  }, {
-	    base: 'Y',
-	    chars: "\u24CE\uFF39\u1EF2\xDD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE",
-	  }, {
-	    base: 'Z',
-	    chars: "\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762",
-	  }, {
-	    base: 'a',
-	    chars: "\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250\u0251",
-	  }, {
-	    base: 'aa',
-	    chars: "\uA733",
-	  }, {
-	    base: 'ae',
-	    chars: "\u00E6\u01FD\u01E3",
-	  }, {
-	    base: 'ao',
-	    chars: "\uA735",
-	  }, {
-	    base: 'au',
-	    chars: "\uA737",
-	  }, {
-	    base: 'av',
-	    chars: "\uA739\uA73B",
-	  }, {
-	    base: 'ay',
-	    chars: "\uA73D",
-	  }, {
-	    base: 'b',
-	    chars: "\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253\u0182",
-	  }, {
-	    base: 'c',
-	    chars: "\uFF43\u24D2\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184",
-	  }, {
-	    base: 'd',
-	    chars: "\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\u018B\u13E7\u0501\uA7AA",
-	  }, {
-	    base: 'dh',
-	    chars: "\u00F0",
-	  }, {
-	    base: 'dz',
-	    chars: "\u01F3\u01C6",
-	  }, {
-	    base: 'e',
-	    chars: "\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u01DD",
-	  }, {
-	    base: 'f',
-	    chars: "\u24D5\uFF46\u1E1F\u0192",
-	  }, {
-	    base: 'ff',
-	    chars: "\uFB00",
-	  }, {
-	    base: 'fi',
-	    chars: "\uFB01",
-	  }, {
-	    base: 'fl',
-	    chars: "\uFB02",
-	  }, {
-	    base: 'ffi',
-	    chars: "\uFB03",
-	  }, {
-	    base: 'ffl',
-	    chars: "\uFB04",
-	  }, {
-	    base: 'g',
-	    chars: "\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\uA77F\u1D79",
-	  }, {
-	    base: 'h',
-	    chars: "\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265",
-	  }, {
-	    base: 'hv',
-	    chars: "\u0195",
-	  }, {
-	    base: 'i',
-	    chars: "\u24D8\uFF49\xEC\xED\xEE\u0129\u012B\u012D\xEF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131",
-	  }, {
-	    base: 'j',
-	    chars: "\u24D9\uFF4A\u0135\u01F0\u0249",
-	  }, {
-	    base: 'k',
-	    chars: "\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3",
-	  }, {
-	    base: 'l',
-	    chars: "\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747\u026D",
-	  }, {
-	    base: 'lj',
-	    chars: "\u01C9",
-	  }, {
-	    base: 'm',
-	    chars: "\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F",
-	  }, {
-	    base: 'n',
-	    chars: "\u24DD\uFF4E\u01F9\u0144\xF1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5\u043B\u0509",
-	  }, {
-	    base: 'nj',
-	    chars: "\u01CC",
-	  }, {
-	    base: 'o',
-	    chars: "\u24DE\uFF4F\xF2\xF3\xF4\u1ED3\u1ED1\u1ED7\u1ED5\xF5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\xF6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\xF8\u01FF\uA74B\uA74D\u0275\u0254\u1D11",
-	  }, {
-	    base: 'oe',
-	    chars: "\u0153",
-	  }, {
-	    base: 'oi',
-	    chars: "\u01A3",
-	  }, {
-	    base: 'oo',
-	    chars: "\uA74F",
-	  }, {
-	    base: 'ou',
-	    chars: "\u0223",
-	  }, {
-	    base: 'p',
-	    chars: "\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755\u03C1",
-	  }, {
-	    base: 'q',
-	    chars: "\u24E0\uFF51\u024B\uA757\uA759",
-	  }, {
-	    base: 'r',
-	    chars: "\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783",
-	  }, {
-	    base: 's',
-	    chars: "\u24E2\uFF53\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B\u0282",
-	  }, {
-	    base: 'ss',
-	    chars: "\xDF",
-	  }, {
-	    base: 't',
-	    chars: "\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787",
-	  }, {
-	    base: 'th',
-	    chars: "\u00FE",
-	  }, {
-	    base: 'tz',
-	    chars: "\uA729",
-	  }, {
-	    base: 'u',
-	    chars: "\u24E4\uFF55\xF9\xFA\xFB\u0169\u1E79\u016B\u1E7B\u016D\xFC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289",
-	  }, {
-	    base: 'v',
-	    chars: "\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C",
-	  }, {
-	    base: 'vy',
-	    chars: "\uA761",
-	  }, {
-	    base: 'w',
-	    chars: "\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73",
-	  }, {
-	    base: 'x',
-	    chars: "\u24E7\uFF58\u1E8B\u1E8D",
-	  }, {
-	    base: 'y',
-	    chars: "\u24E8\uFF59\u1EF3\xFD\u0177\u1EF9\u0233\u1E8F\xFF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF",
-	  }, {
-	    base: 'z',
-	    chars: "\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763",
+	    this._call = callback;
+	    this._time = time;
+	    sleep();
+	  },
+	  stop: function stop() {
+	    if (this._call) {
+	      this._call = null;
+	      this._time = Infinity;
+	      sleep();
+	    }
 	  }
-	];
+	};
+	function timer(callback, delay, time) {
+	  var t = new Timer();
+	  t.restart(callback, delay, time);
+	  return t;
+	}
+	function timerFlush() {
+	  now(); // Get the current time, if not already set.
 
-	var diacriticsMap = {};
-	for (var i$1 = 0; i$1 < replacementList.length; i$1 += 1) {
-	  var chars = replacementList[i$1].chars;
-	  for (var j = 0; j < chars.length; j += 1) {
-	    diacriticsMap[chars[j]] = replacementList[i$1].base;
+	  ++frame; // Pretend we’ve set an alarm, if we haven’t already.
+
+	  var t = taskHead,
+	      e;
+
+	  while (t) {
+	    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
+	    t = t._next;
 	  }
+
+	  --frame;
 	}
 
-	function removeDiacritics(str) {
-	  return str.replace(/[^\u0000-\u007e]/g, function(c) {
-	    return diacriticsMap[c] || c;
-	  });
+	function wake() {
+	  clockNow = (clockLast = clock.now()) + clockSkew;
+	  frame = timeout = 0;
+
+	  try {
+	    timerFlush();
+	  } finally {
+	    frame = 0;
+	    nap();
+	    clockNow = 0;
+	  }
 	}
 
-	var replacementList_1 = replacementList;
-	var diacriticsMap_1 = diacriticsMap;
+	function poke() {
+	  var now = clock.now(),
+	      delay = now - clockLast;
+	  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
+	}
 
-	var diacritics = {
-		remove: remove$1,
-		replacementList: replacementList_1,
-		diacriticsMap: diacriticsMap_1
-	};
+	function nap() {
+	  var t0,
+	      t1 = taskHead,
+	      t2,
+	      time = Infinity;
 
-	var isArabic_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-	var arabicBlocks = [
-	    [0x0600, 0x06FF],
-	    [0x0750, 0x077F],
-	    [0x08A0, 0x08FF],
-	    [0xFB50, 0xFDFF],
-	    [0xFE70, 0xFEFF],
-	    [0x10E60, 0x10E7F],
-	    [0x1EC70, 0x1ECBF],
-	    [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
-	];
-	function isArabic(char) {
-	    if (char.length > 1) {
-	        // allow the newer chars?
-	        throw new Error('isArabic works on only one-character strings');
-	    }
-	    var code = char.charCodeAt(0);
-	    for (var i = 0; i < arabicBlocks.length; i++) {
-	        var block = arabicBlocks[i];
-	        if (code >= block[0] && code <= block[1]) {
-	            return true;
-	        }
+	  while (t1) {
+	    if (t1._call) {
+	      if (time > t1._time) time = t1._time;
+	      t0 = t1, t1 = t1._next;
+	    } else {
+	      t2 = t1._next, t1._next = null;
+	      t1 = t0 ? t0._next = t2 : taskHead = t2;
 	    }
-	    return false;
+	  }
+
+	  taskTail = t0;
+	  sleep(time);
 	}
-	exports.isArabic = isArabic;
-	function isMath(char) {
-	    if (char.length > 2) {
-	        // allow the newer chars?
-	        throw new Error('isMath works on only one-character strings');
-	    }
-	    var code = char.charCodeAt(0);
-	    return ((code >= 0x660 && code <= 0x66C) || (code >= 0x6F0 && code <= 0x6F9));
+
+	function sleep(time) {
+	  if (frame) return; // Soonest alarm already set, or will be.
+
+	  if (timeout) timeout = clearTimeout(timeout);
+	  var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
+
+	  if (delay > 24) {
+	    if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);
+	    if (interval) interval = clearInterval(interval);
+	  } else {
+	    if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);
+	    frame = 1, setFrame(wake);
+	  }
 	}
-	exports.isMath = isMath;
-	});
 
-	var unicodeArabic = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-	var arabicReference = {
-	    "alef": {
-	        "normal": [
-	            "\u0627"
-	        ],
-	        "madda_above": {
-	            "normal": [
-	                "\u0627\u0653",
-	                "\u0622"
-	            ],
-	            "isolated": "\uFE81",
-	            "final": "\uFE82"
-	        },
-	        "hamza_above": {
-	            "normal": [
-	                "\u0627\u0654",
-	                "\u0623"
-	            ],
-	            "isolated": "\uFE83",
-	            "final": "\uFE84"
-	        },
-	        "hamza_below": {
-	            "normal": [
-	                "\u0627\u0655",
-	                "\u0625"
-	            ],
-	            "isolated": "\uFE87",
-	            "final": "\uFE88"
-	        },
-	        "wasla": {
-	            "normal": "\u0671",
-	            "isolated": "\uFB50",
-	            "final": "\uFB51"
-	        },
-	        "wavy_hamza_above": [
-	            "\u0672"
-	        ],
-	        "wavy_hamza_below": [
-	            "\u0627\u065F",
-	            "\u0673"
-	        ],
-	        "high_hamza": [
-	            "\u0675",
-	            "\u0627\u0674"
-	        ],
-	        "indic_two_above": [
-	            "\u0773"
-	        ],
-	        "indic_three_above": [
-	            "\u0774"
-	        ],
-	        "fathatan": {
-	            "normal": [
-	                "\u0627\u064B"
-	            ],
-	            "final": "\uFD3C",
-	            "isolated": "\uFD3D"
-	        },
-	        "isolated": "\uFE8D",
-	        "final": "\uFE8E"
-	    },
-	    "beh": {
-	        "normal": [
-	            "\u0628"
-	        ],
-	        "dotless": [
-	            "\u066E"
-	        ],
-	        "three_dots_horizontally_below": [
-	            "\u0750"
-	        ],
-	        "dot_below_three_dots_above": [
-	            "\u0751"
-	        ],
-	        "three_dots_pointing_upwards_below": [
-	            "\u0752"
-	        ],
-	        "three_dots_pointing_upwards_below_two_dots_above": [
-	            "\u0753"
-	        ],
-	        "two_dots_below_dot_above": [
-	            "\u0754"
-	        ],
-	        "inverted_small_v_below": [
-	            "\u0755"
-	        ],
-	        "small_v": [
-	            "\u0756"
-	        ],
-	        "small_v_below": [
-	            "\u08A0"
-	        ],
-	        "hamza_above": [
-	            "\u08A1"
-	        ],
-	        "small_meem_above": [
-	            "\u08B6"
-	        ],
-	        "isolated": "\uFE8F",
-	        "final": "\uFE90",
-	        "initial": "\uFE91",
-	        "medial": "\uFE92"
-	    },
-	    "teh marbuta": {
-	        "normal": [
-	            "\u0629"
-	        ],
-	        "isolated": "\uFE93",
-	        "final": "\uFE94"
-	    },
-	    "teh": {
-	        "normal": [
-	            "\u062A"
-	        ],
-	        "ring": [
-	            "\u067C"
-	        ],
-	        "three_dots_above_downwards": [
-	            "\u067D"
-	        ],
-	        "small_teh_above": [
-	            "\u08B8"
-	        ],
-	        "isolated": "\uFE95",
-	        "final": "\uFE96",
-	        "initial": "\uFE97",
-	        "medial": "\uFE98"
-	    },
-	    "theh": {
-	        "normal": [
-	            "\u062B"
-	        ],
-	        "isolated": "\uFE99",
-	        "final": "\uFE9A",
-	        "initial": "\uFE9B",
-	        "medial": "\uFE9C"
-	    },
-	    "jeem": {
-	        "normal": [
-	            "\u062C"
-	        ],
-	        "two_dots_above": [
-	            "\u08A2"
-	        ],
-	        "isolated": "\uFE9D",
-	        "final": "\uFE9E",
-	        "initial": "\uFE9F",
-	        "medial": "\uFEA0"
-	    },
-	    "hah": {
-	        "normal": [
-	            "\u062D"
-	        ],
-	        "hamza_above": [
-	            "\u0681"
-	        ],
-	        "two_dots_vertical_above": [
-	            "\u0682"
-	        ],
-	        "three_dots_above": [
-	            "\u0685"
-	        ],
-	        "two_dots_above": [
-	            "\u0757"
-	        ],
-	        "three_dots_pointing_upwards_below": [
-	            "\u0758"
-	        ],
-	        "small_tah_below": [
-	            "\u076E"
-	        ],
-	        "small_tah_two_dots": [
-	            "\u076F"
-	        ],
-	        "small_tah_above": [
-	            "\u0772"
-	        ],
-	        "indic_four_below": [
-	            "\u077C"
-	        ],
-	        "isolated": "\uFEA1",
-	        "final": "\uFEA2",
-	        "initial": "\uFEA3",
-	        "medial": "\uFEA4"
-	    },
-	    "khah": {
-	        "normal": [
-	            "\u062E"
-	        ],
-	        "isolated": "\uFEA5",
-	        "final": "\uFEA6",
-	        "initial": "\uFEA7",
-	        "medial": "\uFEA8"
-	    },
-	    "dal": {
-	        "normal": [
-	            "\u062F"
-	        ],
-	        "ring": [
-	            "\u0689"
-	        ],
-	        "dot_below": [
-	            "\u068A"
-	        ],
-	        "dot_below_small_tah": [
-	            "\u068B"
-	        ],
-	        "three_dots_above_downwards": [
-	            "\u068F"
-	        ],
-	        "four_dots_above": [
-	            "\u0690"
-	        ],
-	        "inverted_v": [
-	            "\u06EE"
-	        ],
-	        "two_dots_vertically_below_small_tah": [
-	            "\u0759"
-	        ],
-	        "inverted_small_v_below": [
-	            "\u075A"
-	        ],
-	        "three_dots_below": [
-	            "\u08AE"
-	        ],
-	        "isolated": "\uFEA9",
-	        "final": "\uFEAA"
-	    },
-	    "thal": {
-	        "normal": [
-	            "\u0630"
-	        ],
-	        "isolated": "\uFEAB",
-	        "final": "\uFEAC"
-	    },
-	    "reh": {
-	        "normal": [
-	            "\u0631"
-	        ],
-	        "small_v": [
-	            "\u0692"
-	        ],
-	        "ring": [
-	            "\u0693"
-	        ],
-	        "dot_below": [
-	            "\u0694"
-	        ],
-	        "small_v_below": [
-	            "\u0695"
-	        ],
-	        "dot_below_dot_above": [
-	            "\u0696"
-	        ],
-	        "two_dots_above": [
-	            "\u0697"
-	        ],
-	        "four_dots_above": [
-	            "\u0699"
-	        ],
-	        "inverted_v": [
-	            "\u06EF"
-	        ],
-	        "stroke": [
-	            "\u075B"
-	        ],
-	        "two_dots_vertically_above": [
-	            "\u076B"
-	        ],
-	        "hamza_above": [
-	            "\u076C"
-	        ],
-	        "small_tah_two_dots": [
-	            "\u0771"
-	        ],
-	        "loop": [
-	            "\u08AA"
-	        ],
-	        "small_noon_above": [
-	            "\u08B9"
-	        ],
-	        "isolated": "\uFEAD",
-	        "final": "\uFEAE"
-	    },
-	    "zain": {
-	        "normal": [
-	            "\u0632"
-	        ],
-	        "inverted_v_above": [
-	            "\u08B2"
-	        ],
-	        "isolated": "\uFEAF",
-	        "final": "\uFEB0"
-	    },
-	    "seen": {
-	        "normal": [
-	            "\u0633"
-	        ],
-	        "dot_below_dot_above": [
-	            "\u069A"
-	        ],
-	        "three_dots_below": [
-	            "\u069B"
-	        ],
-	        "three_dots_below_three_dots_above": [
-	            "\u069C"
-	        ],
-	        "four_dots_above": [
-	            "\u075C"
-	        ],
-	        "two_dots_vertically_above": [
-	            "\u076D"
-	        ],
-	        "small_tah_two_dots": [
-	            "\u0770"
-	        ],
-	        "indic_four_above": [
-	            "\u077D"
-	        ],
-	        "inverted_v": [
-	            "\u077E"
-	        ],
-	        "isolated": "\uFEB1",
-	        "final": "\uFEB2",
-	        "initial": "\uFEB3",
-	        "medial": "\uFEB4"
-	    },
-	    "sheen": {
-	        "normal": [
-	            "\u0634"
-	        ],
-	        "dot_below": [
-	            "\u06FA"
-	        ],
-	        "isolated": "\uFEB5",
-	        "final": "\uFEB6",
-	        "initial": "\uFEB7",
-	        "medial": "\uFEB8"
-	    },
-	    "sad": {
-	        "normal": [
-	            "\u0635"
-	        ],
-	        "two_dots_below": [
-	            "\u069D"
-	        ],
-	        "three_dots_above": [
-	            "\u069E"
-	        ],
-	        "three_dots_below": [
-	            "\u08AF"
-	        ],
-	        "isolated": "\uFEB9",
-	        "final": "\uFEBA",
-	        "initial": "\uFEBB",
-	        "medial": "\uFEBC"
-	    },
-	    "dad": {
-	        "normal": [
-	            "\u0636"
-	        ],
-	        "dot_below": [
-	            "\u06FB"
-	        ],
-	        "isolated": "\uFEBD",
-	        "final": "\uFEBE",
-	        "initial": "\uFEBF",
-	        "medial": "\uFEC0"
-	    },
-	    "tah": {
-	        "normal": [
-	            "\u0637"
-	        ],
-	        "three_dots_above": [
-	            "\u069F"
-	        ],
-	        "two_dots_above": [
-	            "\u08A3"
-	        ],
-	        "isolated": "\uFEC1",
-	        "final": "\uFEC2",
-	        "initial": "\uFEC3",
-	        "medial": "\uFEC4"
-	    },
-	    "zah": {
-	        "normal": [
-	            "\u0638"
-	        ],
-	        "isolated": "\uFEC5",
-	        "final": "\uFEC6",
-	        "initial": "\uFEC7",
-	        "medial": "\uFEC8"
-	    },
-	    "ain": {
-	        "normal": [
-	            "\u0639"
-	        ],
-	        "three_dots_above": [
-	            "\u06A0"
-	        ],
-	        "two_dots_above": [
-	            "\u075D"
-	        ],
-	        "three_dots_pointing_downwards_above": [
-	            "\u075E"
-	        ],
-	        "two_dots_vertically_above": [
-	            "\u075F"
-	        ],
-	        "three_dots_below": [
-	            "\u08B3"
-	        ],
-	        "isolated": "\uFEC9",
-	        "final": "\uFECA",
-	        "initial": "\uFECB",
-	        "medial": "\uFECC"
-	    },
-	    "ghain": {
-	        "normal": [
-	            "\u063A"
-	        ],
-	        "dot_below": [
-	            "\u06FC"
-	        ],
-	        "isolated": "\uFECD",
-	        "final": "\uFECE",
-	        "initial": "\uFECF",
-	        "medial": "\uFED0"
-	    },
-	    "feh": {
-	        "normal": [
-	            "\u0641"
-	        ],
-	        "dotless": [
-	            "\u06A1"
-	        ],
-	        "dot_moved_below": [
-	            "\u06A2"
-	        ],
-	        "dot_below": [
-	            "\u06A3"
-	        ],
-	        "three_dots_below": [
-	            "\u06A5"
-	        ],
-	        "two_dots_below": [
-	            "\u0760"
-	        ],
-	        "three_dots_pointing_upwards_below": [
-	            "\u0761"
-	        ],
-	        "dot_below_three_dots_above": [
-	            "\u08A4"
-	        ],
-	        "isolated": "\uFED1",
-	        "final": "\uFED2",
-	        "initial": "\uFED3",
-	        "medial": "\uFED4"
-	    },
-	    "qaf": {
-	        "normal": [
-	            "\u0642"
-	        ],
-	        "dotless": [
-	            "\u066F"
-	        ],
-	        "dot_above": [
-	            "\u06A7"
-	        ],
-	        "three_dots_above": [
-	            "\u06A8"
-	        ],
-	        "dot_below": [
-	            "\u08A5"
-	        ],
-	        "isolated": "\uFED5",
-	        "final": "\uFED6",
-	        "initial": "\uFED7",
-	        "medial": "\uFED8"
-	    },
-	    "kaf": {
-	        "normal": [
-	            "\u0643"
-	        ],
-	        "swash": [
-	            "\u06AA"
-	        ],
-	        "ring": [
-	            "\u06AB"
-	        ],
-	        "dot_above": [
-	            "\u06AC"
-	        ],
-	        "three_dots_below": [
-	            "\u06AE"
-	        ],
-	        "two_dots_above": [
-	            "\u077F"
-	        ],
-	        "dot_below": [
-	            "\u08B4"
-	        ],
-	        "isolated": "\uFED9",
-	        "final": "\uFEDA",
-	        "initial": "\uFEDB",
-	        "medial": "\uFEDC"
-	    },
-	    "lam": {
-	        "normal": [
-	            "\u0644"
-	        ],
-	        "small_v": [
-	            "\u06B5"
-	        ],
-	        "dot_above": [
-	            "\u06B6"
-	        ],
-	        "three_dots_above": [
-	            "\u06B7"
-	        ],
-	        "three_dots_below": [
-	            "\u06B8"
-	        ],
-	        "bar": [
-	            "\u076A"
-	        ],
-	        "double_bar": [
-	            "\u08A6"
-	        ],
-	        "isolated": "\uFEDD",
-	        "final": "\uFEDE",
-	        "initial": "\uFEDF",
-	        "medial": "\uFEE0"
-	    },
-	    "meem": {
-	        "normal": [
-	            "\u0645"
-	        ],
-	        "dot_above": [
-	            "\u0765"
-	        ],
-	        "dot_below": [
-	            "\u0766"
-	        ],
-	        "three_dots_above": [
-	            "\u08A7"
-	        ],
-	        "isolated": "\uFEE1",
-	        "final": "\uFEE2",
-	        "initial": "\uFEE3",
-	        "medial": "\uFEE4"
-	    },
-	    "noon": {
-	        "normal": [
-	            "\u0646"
-	        ],
-	        "dot_below": [
-	            "\u06B9"
-	        ],
-	        "ring": [
-	            "\u06BC"
-	        ],
-	        "three_dots_above": [
-	            "\u06BD"
-	        ],
-	        "two_dots_below": [
-	            "\u0767"
-	        ],
-	        "small_tah": [
-	            "\u0768"
-	        ],
-	        "small_v": [
-	            "\u0769"
-	        ],
-	        "isolated": "\uFEE5",
-	        "final": "\uFEE6",
-	        "initial": "\uFEE7",
-	        "medial": "\uFEE8"
-	    },
-	    "heh": {
-	        "normal": [
-	            "\u0647"
-	        ],
-	        "isolated": "\uFEE9",
-	        "final": "\uFEEA",
-	        "initial": "\uFEEB",
-	        "medial": "\uFEEC"
-	    },
-	    "waw": {
-	        "normal": [
-	            "\u0648"
-	        ],
-	        "hamza_above": {
-	            "normal": [
-	                "\u0624",
-	                "\u0648\u0654"
-	            ],
-	            "isolated": "\uFE85",
-	            "final": "\uFE86"
-	        },
-	        "high_hamza": [
-	            "\u0676",
-	            "\u0648\u0674"
-	        ],
-	        "ring": [
-	            "\u06C4"
-	        ],
-	        "two_dots_above": [
-	            "\u06CA"
-	        ],
-	        "dot_above": [
-	            "\u06CF"
-	        ],
-	        "indic_two_above": [
-	            "\u0778"
-	        ],
-	        "indic_three_above": [
-	            "\u0779"
-	        ],
-	        "dot_within": [
-	            "\u08AB"
-	        ],
-	        "isolated": "\uFEED",
-	        "final": "\uFEEE"
-	    },
-	    "alef_maksura": {
-	        "normal": [
-	            "\u0649"
-	        ],
-	        "hamza_above": [
-	            "\u0626",
-	            "\u064A\u0654"
-	        ],
-	        "initial": "\uFBE8",
-	        "medial": "\uFBE9",
-	        "isolated": "\uFEEF",
-	        "final": "\uFEF0"
-	    },
-	    "yeh": {
-	        "normal": [
-	            "\u064A"
-	        ],
-	        "hamza_above": {
-	            "normal": [
-	                "\u0626",
-	                "\u0649\u0654"
-	            ],
-	            "isolated": "\uFE89",
-	            "final": "\uFE8A",
-	            "initial": "\uFE8B",
-	            "medial": "\uFE8C"
-	        },
-	        "two_dots_below_hamza_above": [
-	            "\u08A8"
-	        ],
-	        "high_hamza": [
-	            "\u0678",
-	            "\u064A\u0674"
-	        ],
-	        "tail": [
-	            "\u06CD"
-	        ],
-	        "small_v": [
-	            "\u06CE"
-	        ],
-	        "three_dots_below": [
-	            "\u06D1"
-	        ],
-	        "two_dots_below_dot_above": [
-	            "\u08A9"
-	        ],
-	        "two_dots_below_small_noon_above": [
-	            "\u08BA"
-	        ],
-	        "isolated": "\uFEF1",
-	        "final": "\uFEF2",
-	        "initial": "\uFEF3",
-	        "medial": "\uFEF4"
-	    },
-	    "tteh": {
-	        "normal": [
-	            "\u0679"
-	        ],
-	        "isolated": "\uFB66",
-	        "final": "\uFB67",
-	        "initial": "\uFB68",
-	        "medial": "\uFB69"
-	    },
-	    "tteheh": {
-	        "normal": [
-	            "\u067A"
-	        ],
-	        "isolated": "\uFB5E",
-	        "final": "\uFB5F",
-	        "initial": "\uFB60",
-	        "medial": "\uFB61"
-	    },
-	    "beeh": {
-	        "normal": [
-	            "\u067B"
-	        ],
-	        "isolated": "\uFB52",
-	        "final": "\uFB53",
-	        "initial": "\uFB54",
-	        "medial": "\uFB55"
-	    },
-	    "peh": {
-	        "normal": [
-	            "\u067E"
-	        ],
-	        "small_meem_above": [
-	            "\u08B7"
-	        ],
-	        "isolated": "\uFB56",
-	        "final": "\uFB57",
-	        "initial": "\uFB58",
-	        "medial": "\uFB59"
-	    },
-	    "teheh": {
-	        "normal": [
-	            "\u067F"
-	        ],
-	        "isolated": "\uFB62",
-	        "final": "\uFB63",
-	        "initial": "\uFB64",
-	        "medial": "\uFB65"
-	    },
-	    "beheh": {
-	        "normal": [
-	            "\u0680"
-	        ],
-	        "isolated": "\uFB5A",
-	        "final": "\uFB5B",
-	        "initial": "\uFB5C",
-	        "medial": "\uFB5D"
-	    },
-	    "nyeh": {
-	        "normal": [
-	            "\u0683"
-	        ],
-	        "isolated": "\uFB76",
-	        "final": "\uFB77",
-	        "initial": "\uFB78",
-	        "medial": "\uFB79"
-	    },
-	    "dyeh": {
-	        "normal": [
-	            "\u0684"
-	        ],
-	        "isolated": "\uFB72",
-	        "final": "\uFB73",
-	        "initial": "\uFB74",
-	        "medial": "\uFB75"
-	    },
-	    "tcheh": {
-	        "normal": [
-	            "\u0686"
-	        ],
-	        "dot_above": [
-	            "\u06BF"
-	        ],
-	        "isolated": "\uFB7A",
-	        "final": "\uFB7B",
-	        "initial": "\uFB7C",
-	        "medial": "\uFB7D"
-	    },
-	    "tcheheh": {
-	        "normal": [
-	            "\u0687"
-	        ],
-	        "isolated": "\uFB7E",
-	        "final": "\uFB7F",
-	        "initial": "\uFB80",
-	        "medial": "\uFB81"
-	    },
-	    "ddal": {
-	        "normal": [
-	            "\u0688"
-	        ],
-	        "isolated": "\uFB88",
-	        "final": "\uFB89"
-	    },
-	    "dahal": {
-	        "normal": [
-	            "\u068C"
-	        ],
-	        "isolated": "\uFB84",
-	        "final": "\uFB85"
-	    },
-	    "ddahal": {
-	        "normal": [
-	            "\u068D"
-	        ],
-	        "isolated": "\uFB82",
-	        "final": "\uFB83"
-	    },
-	    "dul": {
-	        "normal": [
-	            "\u068F",
-	            "\u068E"
-	        ],
-	        "isolated": "\uFB86",
-	        "final": "\uFB87"
-	    },
-	    "rreh": {
-	        "normal": [
-	            "\u0691"
-	        ],
-	        "isolated": "\uFB8C",
-	        "final": "\uFB8D"
-	    },
-	    "jeh": {
-	        "normal": [
-	            "\u0698"
-	        ],
-	        "isolated": "\uFB8A",
-	        "final": "\uFB8B"
-	    },
-	    "veh": {
-	        "normal": [
-	            "\u06A4"
-	        ],
-	        "isolated": "\uFB6A",
-	        "final": "\uFB6B",
-	        "initial": "\uFB6C",
-	        "medial": "\uFB6D"
-	    },
-	    "peheh": {
-	        "normal": [
-	            "\u06A6"
-	        ],
-	        "isolated": "\uFB6E",
-	        "final": "\uFB6F",
-	        "initial": "\uFB70",
-	        "medial": "\uFB71"
-	    },
-	    "keheh": {
-	        "normal": [
-	            "\u06A9"
-	        ],
-	        "dot_above": [
-	            "\u0762"
-	        ],
-	        "three_dots_above": [
-	            "\u0763"
-	        ],
-	        "three_dots_pointing_upwards_below": [
-	            "\u0764"
-	        ],
-	        "isolated": "\uFB8E",
-	        "final": "\uFB8F",
-	        "initial": "\uFB90",
-	        "medial": "\uFB91"
-	    },
-	    "ng": {
-	        "normal": [
-	            "\u06AD"
-	        ],
-	        "isolated": "\uFBD3",
-	        "final": "\uFBD4",
-	        "initial": "\uFBD5",
-	        "medial": "\uFBD6"
-	    },
-	    "gaf": {
-	        "normal": [
-	            "\u06AF"
-	        ],
-	        "ring": [
-	            "\u06B0"
-	        ],
-	        "two_dots_below": [
-	            "\u06B2"
-	        ],
-	        "three_dots_above": [
-	            "\u06B4"
-	        ],
-	        "inverted_stroke": [
-	            "\u08B0"
-	        ],
-	        "isolated": "\uFB92",
-	        "final": "\uFB93",
-	        "initial": "\uFB94",
-	        "medial": "\uFB95"
-	    },
-	    "ngoeh": {
-	        "normal": [
-	            "\u06B1"
-	        ],
-	        "isolated": "\uFB9A",
-	        "final": "\uFB9B",
-	        "initial": "\uFB9C",
-	        "medial": "\uFB9D"
-	    },
-	    "gueh": {
-	        "normal": [
-	            "\u06B3"
-	        ],
-	        "isolated": "\uFB96",
-	        "final": "\uFB97",
-	        "initial": "\uFB98",
-	        "medial": "\uFB99"
-	    },
-	    "noon ghunna": {
-	        "normal": [
-	            "\u06BA"
-	        ],
-	        "isolated": "\uFB9E",
-	        "final": "\uFB9F"
-	    },
-	    "rnoon": {
-	        "normal": [
-	            "\u06BB"
-	        ],
-	        "isolated": "\uFBA0",
-	        "final": "\uFBA1",
-	        "initial": "\uFBA2",
-	        "medial": "\uFBA3"
-	    },
-	    "heh doachashmee": {
-	        "normal": [
-	            "\u06BE"
-	        ],
-	        "isolated": "\uFBAA",
-	        "final": "\uFBAB",
-	        "initial": "\uFBAC",
-	        "medial": "\uFBAD"
-	    },
-	    "heh goal": {
-	        "normal": [
-	            "\u06C1"
-	        ],
-	        "hamza_above": [
-	            "\u06C1\u0654",
-	            "\u06C2"
-	        ],
-	        "isolated": "\uFBA6",
-	        "final": "\uFBA7",
-	        "initial": "\uFBA8",
-	        "medial": "\uFBA9"
-	    },
-	    "teh marbuta goal": {
-	        "normal": [
-	            "\u06C3"
-	        ]
-	    },
-	    "kirghiz oe": {
-	        "normal": [
-	            "\u06C5"
-	        ],
-	        "isolated": "\uFBE0",
-	        "final": "\uFBE1"
-	    },
-	    "oe": {
-	        "normal": [
-	            "\u06C6"
-	        ],
-	        "isolated": "\uFBD9",
-	        "final": "\uFBDA"
-	    },
-	    "u": {
-	        "normal": [
-	            "\u06C7"
-	        ],
-	        "hamza_above": {
-	            "normal": [
-	                "\u0677",
-	                "\u06C7\u0674"
-	            ],
-	            "isolated": "\uFBDD"
-	        },
-	        "isolated": "\uFBD7",
-	        "final": "\uFBD8"
-	    },
-	    "yu": {
-	        "normal": [
-	            "\u06C8"
-	        ],
-	        "isolated": "\uFBDB",
-	        "final": "\uFBDC"
-	    },
-	    "kirghiz yu": {
-	        "normal": [
-	            "\u06C9"
-	        ],
-	        "isolated": "\uFBE2",
-	        "final": "\uFBE3"
-	    },
-	    "ve": {
-	        "normal": [
-	            "\u06CB"
-	        ],
-	        "isolated": "\uFBDE",
-	        "final": "\uFBDF"
-	    },
-	    "farsi yeh": {
-	        "normal": [
-	            "\u06CC"
-	        ],
-	        "indic_two_above": [
-	            "\u0775"
-	        ],
-	        "indic_three_above": [
-	            "\u0776"
-	        ],
-	        "indic_four_above": [
-	            "\u0777"
-	        ],
-	        "isolated": "\uFBFC",
-	        "final": "\uFBFD",
-	        "initial": "\uFBFE",
-	        "medial": "\uFBFF"
-	    },
-	    "e": {
-	        "normal": [
-	            "\u06D0"
-	        ],
-	        "isolated": "\uFBE4",
-	        "final": "\uFBE5",
-	        "initial": "\uFBE6",
-	        "medial": "\uFBE7"
-	    },
-	    "yeh barree": {
-	        "normal": [
-	            "\u06D2"
-	        ],
-	        "hamza_above": {
-	            "normal": [
-	                "\u06D2\u0654",
-	                "\u06D3"
-	            ],
-	            "isolated": "\uFBB0",
-	            "final": "\uFBB1"
-	        },
-	        "indic_two_above": [
-	            "\u077A"
-	        ],
-	        "indic_three_above": [
-	            "\u077B"
-	        ],
-	        "isolated": "\uFBAE",
-	        "final": "\uFBAF"
-	    },
-	    "ae": {
-	        "normal": [
-	            "\u06D5"
-	        ],
-	        "isolated": "\u06D5",
-	        "final": "\uFEEA",
-	        "yeh_above": {
-	            "normal": [
-	                "\u06C0",
-	                "\u06D5\u0654"
-	            ],
-	            "isolated": "\uFBA4",
-	            "final": "\uFBA5"
-	        }
-	    },
-	    "rohingya yeh": {
-	        "normal": [
-	            "\u08AC"
-	        ]
-	    },
-	    "low alef": {
-	        "normal": [
-	            "\u08AD"
-	        ]
-	    },
-	    "straight waw": {
-	        "normal": [
-	            "\u08B1"
-	        ]
-	    },
-	    "african feh": {
-	        "normal": [
-	            "\u08BB"
-	        ]
-	    },
-	    "african qaf": {
-	        "normal": [
-	            "\u08BC"
-	        ]
-	    },
-	    "african noon": {
-	        "normal": [
-	            "\u08BD"
-	        ]
-	    }
-	};
-	exports.default = arabicReference;
-	});
-
-	var unicodeLigatures = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-	var ligatureReference = {
-	    "\u0626\u0627": {
-	        "isolated": "\uFBEA",
-	        "final": "\uFBEB"
-	    },
-	    "\u0626\u06D5": {
-	        "isolated": "\uFBEC",
-	        "final": "\uFBED"
-	    },
-	    "\u0626\u0648": {
-	        "isolated": "\uFBEE",
-	        "final": "\uFBEF"
-	    },
-	    "\u0626\u06C7": {
-	        "isolated": "\uFBF0",
-	        "final": "\uFBF1"
-	    },
-	    "\u0626\u06C6": {
-	        "isolated": "\uFBF2",
-	        "final": "\uFBF3"
-	    },
-	    "\u0626\u06C8": {
-	        "isolated": "\uFBF4",
-	        "final": "\uFBF5"
-	    },
-	    "\u0626\u06D0": {
-	        "isolated": "\uFBF6",
-	        "final": "\uFBF7",
-	        "initial": "\uFBF8"
-	    },
-	    "\u0626\u0649": {
-	        "uighur_kirghiz": {
-	            "isolated": "\uFBF9",
-	            "final": "\uFBFA",
-	            "initial": "\uFBFB"
-	        },
-	        "isolated": "\uFC03",
-	        "final": "\uFC68"
-	    },
-	    "\u0626\u062C": {
-	        "isolated": "\uFC00",
-	        "initial": "\uFC97"
-	    },
-	    "\u0626\u062D": {
-	        "isolated": "\uFC01",
-	        "initial": "\uFC98"
-	    },
-	    "\u0626\u0645": {
-	        "isolated": "\uFC02",
-	        "final": "\uFC66",
-	        "initial": "\uFC9A",
-	        "medial": "\uFCDF"
-	    },
-	    "\u0626\u064A": {
-	        "isolated": "\uFC04",
-	        "final": "\uFC69"
-	    },
-	    "\u0628\u062C": {
-	        "isolated": "\uFC05",
-	        "initial": "\uFC9C"
-	    },
-	    "\u0628\u062D": {
-	        "isolated": "\uFC06",
-	        "initial": "\uFC9D"
-	    },
-	    "\u0628\u062E": {
-	        "isolated": "\uFC07",
-	        "initial": "\uFC9E"
-	    },
-	    "\u0628\u0645": {
-	        "isolated": "\uFC08",
-	        "final": "\uFC6C",
-	        "initial": "\uFC9F",
-	        "medial": "\uFCE1"
-	    },
-	    "\u0628\u0649": {
-	        "isolated": "\uFC09",
-	        "final": "\uFC6E"
-	    },
-	    "\u0628\u064A": {
-	        "isolated": "\uFC0A",
-	        "final": "\uFC6F"
-	    },
-	    "\u062A\u062C": {
-	        "isolated": "\uFC0B",
-	        "initial": "\uFCA1"
-	    },
-	    "\u062A\u062D": {
-	        "isolated": "\uFC0C",
-	        "initial": "\uFCA2"
-	    },
-	    "\u062A\u062E": {
-	        "isolated": "\uFC0D",
-	        "initial": "\uFCA3"
-	    },
-	    "\u062A\u0645": {
-	        "isolated": "\uFC0E",
-	        "final": "\uFC72",
-	        "initial": "\uFCA4",
-	        "medial": "\uFCE3"
-	    },
-	    "\u062A\u0649": {
-	        "isolated": "\uFC0F",
-	        "final": "\uFC74"
-	    },
-	    "\u062A\u064A": {
-	        "isolated": "\uFC10",
-	        "final": "\uFC75"
-	    },
-	    "\u062B\u062C": {
-	        "isolated": "\uFC11"
-	    },
-	    "\u062B\u0645": {
-	        "isolated": "\uFC12",
-	        "final": "\uFC78",
-	        "initial": "\uFCA6",
-	        "medial": "\uFCE5"
-	    },
-	    "\u062B\u0649": {
-	        "isolated": "\uFC13",
-	        "final": "\uFC7A"
-	    },
-	    "\u062B\u0648": {
-	        "isolated": "\uFC14"
-	    },
-	    "\u062C\u062D": {
-	        "isolated": "\uFC15",
-	        "initial": "\uFCA7"
-	    },
-	    "\u062C\u0645": {
-	        "isolated": "\uFC16",
-	        "initial": "\uFCA8"
-	    },
-	    "\u062D\u062C": {
-	        "isolated": "\uFC17",
-	        "initial": "\uFCA9"
-	    },
-	    "\u062D\u0645": {
-	        "isolated": "\uFC18",
-	        "initial": "\uFCAA"
-	    },
-	    "\u062E\u062C": {
-	        "isolated": "\uFC19",
-	        "initial": "\uFCAB"
-	    },
-	    "\u062E\u062D": {
-	        "isolated": "\uFC1A"
-	    },
-	    "\u062E\u0645": {
-	        "isolated": "\uFC1B",
-	        "initial": "\uFCAC"
-	    },
-	    "\u0633\u062C": {
-	        "isolated": "\uFC1C",
-	        "initial": "\uFCAD",
-	        "medial": "\uFD34"
-	    },
-	    "\u0633\u062D": {
-	        "isolated": "\uFC1D",
-	        "initial": "\uFCAE",
-	        "medial": "\uFD35"
-	    },
-	    "\u0633\u062E": {
-	        "isolated": "\uFC1E",
-	        "initial": "\uFCAF",
-	        "medial": "\uFD36"
-	    },
-	    "\u0633\u0645": {
-	        "isolated": "\uFC1F",
-	        "initial": "\uFCB0",
-	        "medial": "\uFCE7"
-	    },
-	    "\u0635\u062D": {
-	        "isolated": "\uFC20",
-	        "initial": "\uFCB1"
-	    },
-	    "\u0635\u0645": {
-	        "isolated": "\uFC21",
-	        "initial": "\uFCB3"
-	    },
-	    "\u0636\u062C": {
-	        "isolated": "\uFC22",
-	        "initial": "\uFCB4"
-	    },
-	    "\u0636\u062D": {
-	        "isolated": "\uFC23",
-	        "initial": "\uFCB5"
-	    },
-	    "\u0636\u062E": {
-	        "isolated": "\uFC24",
-	        "initial": "\uFCB6"
-	    },
-	    "\u0636\u0645": {
-	        "isolated": "\uFC25",
-	        "initial": "\uFCB7"
-	    },
-	    "\u0637\u062D": {
-	        "isolated": "\uFC26",
-	        "initial": "\uFCB8"
-	    },
-	    "\u0637\u0645": {
-	        "isolated": "\uFC27",
-	        "initial": "\uFD33",
-	        "medial": "\uFD3A"
-	    },
-	    "\u0638\u0645": {
-	        "isolated": "\uFC28",
-	        "initial": "\uFCB9",
-	        "medial": "\uFD3B"
-	    },
-	    "\u0639\u062C": {
-	        "isolated": "\uFC29",
-	        "initial": "\uFCBA"
-	    },
-	    "\u0639\u0645": {
-	        "isolated": "\uFC2A",
-	        "initial": "\uFCBB"
-	    },
-	    "\u063A\u062C": {
-	        "isolated": "\uFC2B",
-	        "initial": "\uFCBC"
-	    },
-	    "\u063A\u0645": {
-	        "isolated": "\uFC2C",
-	        "initial": "\uFCBD"
-	    },
-	    "\u0641\u062C": {
-	        "isolated": "\uFC2D",
-	        "initial": "\uFCBE"
-	    },
-	    "\u0641\u062D": {
-	        "isolated": "\uFC2E",
-	        "initial": "\uFCBF"
-	    },
-	    "\u0641\u062E": {
-	        "isolated": "\uFC2F",
-	        "initial": "\uFCC0"
-	    },
-	    "\u0641\u0645": {
-	        "isolated": "\uFC30",
-	        "initial": "\uFCC1"
-	    },
-	    "\u0641\u0649": {
-	        "isolated": "\uFC31",
-	        "final": "\uFC7C"
-	    },
-	    "\u0641\u064A": {
-	        "isolated": "\uFC32",
-	        "final": "\uFC7D"
-	    },
-	    "\u0642\u062D": {
-	        "isolated": "\uFC33",
-	        "initial": "\uFCC2"
-	    },
-	    "\u0642\u0645": {
-	        "isolated": "\uFC34",
-	        "initial": "\uFCC3"
-	    },
-	    "\u0642\u0649": {
-	        "isolated": "\uFC35",
-	        "final": "\uFC7E"
-	    },
-	    "\u0642\u064A": {
-	        "isolated": "\uFC36",
-	        "final": "\uFC7F"
-	    },
-	    "\u0643\u0627": {
-	        "isolated": "\uFC37",
-	        "final": "\uFC80"
-	    },
-	    "\u0643\u062C": {
-	        "isolated": "\uFC38",
-	        "initial": "\uFCC4"
-	    },
-	    "\u0643\u062D": {
-	        "isolated": "\uFC39",
-	        "initial": "\uFCC5"
-	    },
-	    "\u0643\u062E": {
-	        "isolated": "\uFC3A",
-	        "initial": "\uFCC6"
-	    },
-	    "\u0643\u0644": {
-	        "isolated": "\uFC3B",
-	        "final": "\uFC81",
-	        "initial": "\uFCC7",
-	        "medial": "\uFCEB"
-	    },
-	    "\u0643\u0645": {
-	        "isolated": "\uFC3C",
-	        "final": "\uFC82",
-	        "initial": "\uFCC8",
-	        "medial": "\uFCEC"
-	    },
-	    "\u0643\u0649": {
-	        "isolated": "\uFC3D",
-	        "final": "\uFC83"
-	    },
-	    "\u0643\u064A": {
-	        "isolated": "\uFC3E",
-	        "final": "\uFC84"
-	    },
-	    "\u0644\u062C": {
-	        "isolated": "\uFC3F",
-	        "initial": "\uFCC9"
-	    },
-	    "\u0644\u062D": {
-	        "isolated": "\uFC40",
-	        "initial": "\uFCCA"
-	    },
-	    "\u0644\u062E": {
-	        "isolated": "\uFC41",
-	        "initial": "\uFCCB"
-	    },
-	    "\u0644\u0645": {
-	        "isolated": "\uFC42",
-	        "final": "\uFC85",
-	        "initial": "\uFCCC",
-	        "medial": "\uFCED"
-	    },
-	    "\u0644\u0649": {
-	        "isolated": "\uFC43",
-	        "final": "\uFC86"
-	    },
-	    "\u0644\u064A": {
-	        "isolated": "\uFC44",
-	        "final": "\uFC87"
-	    },
-	    "\u0645\u062C": {
-	        "isolated": "\uFC45",
-	        "initial": "\uFCCE"
-	    },
-	    "\u0645\u062D": {
-	        "isolated": "\uFC46",
-	        "initial": "\uFCCF"
-	    },
-	    "\u0645\u062E": {
-	        "isolated": "\uFC47",
-	        "initial": "\uFCD0"
-	    },
-	    "\u0645\u0645": {
-	        "isolated": "\uFC48",
-	        "final": "\uFC89",
-	        "initial": "\uFCD1"
-	    },
-	    "\u0645\u0649": {
-	        "isolated": "\uFC49"
-	    },
-	    "\u0645\u064A": {
-	        "isolated": "\uFC4A"
-	    },
-	    "\u0646\u062C": {
-	        "isolated": "\uFC4B",
-	        "initial": "\uFCD2"
-	    },
-	    "\u0646\u062D": {
-	        "isolated": "\uFC4C",
-	        "initial": "\uFCD3"
-	    },
-	    "\u0646\u062E": {
-	        "isolated": "\uFC4D",
-	        "initial": "\uFCD4"
-	    },
-	    "\u0646\u0645": {
-	        "isolated": "\uFC4E",
-	        "final": "\uFC8C",
-	        "initial": "\uFCD5",
-	        "medial": "\uFCEE"
-	    },
-	    "\u0646\u0649": {
-	        "isolated": "\uFC4F",
-	        "final": "\uFC8E"
-	    },
-	    "\u0646\u064A": {
-	        "isolated": "\uFC50",
-	        "final": "\uFC8F"
-	    },
-	    "\u0647\u062C": {
-	        "isolated": "\uFC51",
-	        "initial": "\uFCD7"
-	    },
-	    "\u0647\u0645": {
-	        "isolated": "\uFC52",
-	        "initial": "\uFCD8"
-	    },
-	    "\u0647\u0649": {
-	        "isolated": "\uFC53"
-	    },
-	    "\u0647\u064A": {
-	        "isolated": "\uFC54"
-	    },
-	    "\u064A\u062C": {
-	        "isolated": "\uFC55",
-	        "initial": "\uFCDA"
-	    },
-	    "\u064A\u062D": {
-	        "isolated": "\uFC56",
-	        "initial": "\uFCDB"
-	    },
-	    "\u064A\u062E": {
-	        "isolated": "\uFC57",
-	        "initial": "\uFCDC"
-	    },
-	    "\u064A\u0645": {
-	        "isolated": "\uFC58",
-	        "final": "\uFC93",
-	        "initial": "\uFCDD",
-	        "medial": "\uFCF0"
-	    },
-	    "\u064A\u0649": {
-	        "isolated": "\uFC59",
-	        "final": "\uFC95"
-	    },
-	    "\u064A\u064A": {
-	        "isolated": "\uFC5A",
-	        "final": "\uFC96"
-	    },
-	    "\u0630\u0670": {
-	        "isolated": "\uFC5B"
-	    },
-	    "\u0631\u0670": {
-	        "isolated": "\uFC5C"
-	    },
-	    "\u0649\u0670": {
-	        "isolated": "\uFC5D",
-	        "final": "\uFC90"
-	    },
-	    "\u064C\u0651": {
-	        "isolated": "\uFC5E"
-	    },
-	    "\u064D\u0651": {
-	        "isolated": "\uFC5F"
-	    },
-	    "\u064E\u0651": {
-	        "isolated": "\uFC60"
-	    },
-	    "\u064F\u0651": {
-	        "isolated": "\uFC61"
-	    },
-	    "\u0650\u0651": {
-	        "isolated": "\uFC62"
-	    },
-	    "\u0651\u0670": {
-	        "isolated": "\uFC63"
-	    },
-	    "\u0626\u0631": {
-	        "final": "\uFC64"
-	    },
-	    "\u0626\u0632": {
-	        "final": "\uFC65"
-	    },
-	    "\u0626\u0646": {
-	        "final": "\uFC67"
-	    },
-	    "\u0628\u0631": {
-	        "final": "\uFC6A"
-	    },
-	    "\u0628\u0632": {
-	        "final": "\uFC6B"
-	    },
-	    "\u0628\u0646": {
-	        "final": "\uFC6D"
-	    },
-	    "\u062A\u0631": {
-	        "final": "\uFC70"
-	    },
-	    "\u062A\u0632": {
-	        "final": "\uFC71"
-	    },
-	    "\u062A\u0646": {
-	        "final": "\uFC73"
-	    },
-	    "\u062B\u0631": {
-	        "final": "\uFC76"
-	    },
-	    "\u062B\u0632": {
-	        "final": "\uFC77"
-	    },
-	    "\u062B\u0646": {
-	        "final": "\uFC79"
-	    },
-	    "\u062B\u064A": {
-	        "final": "\uFC7B"
-	    },
-	    "\u0645\u0627": {
-	        "final": "\uFC88"
-	    },
-	    "\u0646\u0631": {
-	        "final": "\uFC8A"
-	    },
-	    "\u0646\u0632": {
-	        "final": "\uFC8B"
-	    },
-	    "\u0646\u0646": {
-	        "final": "\uFC8D"
-	    },
-	    "\u064A\u0631": {
-	        "final": "\uFC91"
-	    },
-	    "\u064A\u0632": {
-	        "final": "\uFC92"
-	    },
-	    "\u064A\u0646": {
-	        "final": "\uFC94"
-	    },
-	    "\u0626\u062E": {
-	        "initial": "\uFC99"
-	    },
-	    "\u0626\u0647": {
-	        "initial": "\uFC9B",
-	        "medial": "\uFCE0"
-	    },
-	    "\u0628\u0647": {
-	        "initial": "\uFCA0",
-	        "medial": "\uFCE2"
-	    },
-	    "\u062A\u0647": {
-	        "initial": "\uFCA5",
-	        "medial": "\uFCE4"
-	    },
-	    "\u0635\u062E": {
-	        "initial": "\uFCB2"
-	    },
-	    "\u0644\u0647": {
-	        "initial": "\uFCCD"
-	    },
-	    "\u0646\u0647": {
-	        "initial": "\uFCD6",
-	        "medial": "\uFCEF"
-	    },
-	    "\u0647\u0670": {
-	        "initial": "\uFCD9"
-	    },
-	    "\u064A\u0647": {
-	        "initial": "\uFCDE",
-	        "medial": "\uFCF1"
-	    },
-	    "\u062B\u0647": {
-	        "medial": "\uFCE6"
-	    },
-	    "\u0633\u0647": {
-	        "medial": "\uFCE8",
-	        "initial": "\uFD31"
-	    },
-	    "\u0634\u0645": {
-	        "medial": "\uFCE9",
-	        "isolated": "\uFD0C",
-	        "final": "\uFD28",
-	        "initial": "\uFD30"
-	    },
-	    "\u0634\u0647": {
-	        "medial": "\uFCEA",
-	        "initial": "\uFD32"
-	    },
-	    "\u0640\u064E\u0651": {
-	        "medial": "\uFCF2"
-	    },
-	    "\u0640\u064F\u0651": {
-	        "medial": "\uFCF3"
-	    },
-	    "\u0640\u0650\u0651": {
-	        "medial": "\uFCF4"
-	    },
-	    "\u0637\u0649": {
-	        "isolated": "\uFCF5",
-	        "final": "\uFD11"
-	    },
-	    "\u0637\u064A": {
-	        "isolated": "\uFCF6",
-	        "final": "\uFD12"
-	    },
-	    "\u0639\u0649": {
-	        "isolated": "\uFCF7",
-	        "final": "\uFD13"
-	    },
-	    "\u0639\u064A": {
-	        "isolated": "\uFCF8",
-	        "final": "\uFD14"
-	    },
-	    "\u063A\u0649": {
-	        "isolated": "\uFCF9",
-	        "final": "\uFD15"
-	    },
-	    "\u063A\u064A": {
-	        "isolated": "\uFCFA",
-	        "final": "\uFD16"
-	    },
-	    "\u0633\u0649": {
-	        "isolated": "\uFCFB"
-	    },
-	    "\u0633\u064A": {
-	        "isolated": "\uFCFC",
-	        "final": "\uFD18"
-	    },
-	    "\u0634\u0649": {
-	        "isolated": "\uFCFD",
-	        "final": "\uFD19"
-	    },
-	    "\u0634\u064A": {
-	        "isolated": "\uFCFE",
-	        "final": "\uFD1A"
-	    },
-	    "\u062D\u0649": {
-	        "isolated": "\uFCFF",
-	        "final": "\uFD1B"
-	    },
-	    "\u062D\u064A": {
-	        "isolated": "\uFD00",
-	        "final": "\uFD1C"
-	    },
-	    "\u062C\u0649": {
-	        "isolated": "\uFD01",
-	        "final": "\uFD1D"
-	    },
-	    "\u062C\u064A": {
-	        "isolated": "\uFD02",
-	        "final": "\uFD1E"
-	    },
-	    "\u062E\u0649": {
-	        "isolated": "\uFD03",
-	        "final": "\uFD1F"
-	    },
-	    "\u062E\u064A": {
-	        "isolated": "\uFD04",
-	        "final": "\uFD20"
-	    },
-	    "\u0635\u0649": {
-	        "isolated": "\uFD05",
-	        "final": "\uFD21"
-	    },
-	    "\u0635\u064A": {
-	        "isolated": "\uFD06",
-	        "final": "\uFD22"
-	    },
-	    "\u0636\u0649": {
-	        "isolated": "\uFD07",
-	        "final": "\uFD23"
-	    },
-	    "\u0636\u064A": {
-	        "isolated": "\uFD08",
-	        "final": "\uFD24"
-	    },
-	    "\u0634\u062C": {
-	        "isolated": "\uFD09",
-	        "final": "\uFD25",
-	        "initial": "\uFD2D",
-	        "medial": "\uFD37"
-	    },
-	    "\u0634\u062D": {
-	        "isolated": "\uFD0A",
-	        "final": "\uFD26",
-	        "initial": "\uFD2E",
-	        "medial": "\uFD38"
-	    },
-	    "\u0634\u062E": {
-	        "isolated": "\uFD0B",
-	        "final": "\uFD27",
-	        "initial": "\uFD2F",
-	        "medial": "\uFD39"
-	    },
-	    "\u0634\u0631": {
-	        "isolated": "\uFD0D",
-	        "final": "\uFD29"
-	    },
-	    "\u0633\u0631": {
-	        "isolated": "\uFD0E",
-	        "final": "\uFD2A"
-	    },
-	    "\u0635\u0631": {
-	        "isolated": "\uFD0F",
-	        "final": "\uFD2B"
-	    },
-	    "\u0636\u0631": {
-	        "isolated": "\uFD10",
-	        "final": "\uFD2C"
-	    },
-	    "\u0633\u0639": {
-	        "final": "\uFD17"
-	    },
-	    "\u062A\u062C\u0645": {
-	        "initial": "\uFD50"
-	    },
-	    "\u062A\u062D\u062C": {
-	        "final": "\uFD51",
-	        "initial": "\uFD52"
-	    },
-	    "\u062A\u062D\u0645": {
-	        "initial": "\uFD53"
-	    },
-	    "\u062A\u062E\u0645": {
-	        "initial": "\uFD54"
-	    },
-	    "\u062A\u0645\u062C": {
-	        "initial": "\uFD55"
-	    },
-	    "\u062A\u0645\u062D": {
-	        "initial": "\uFD56"
-	    },
-	    "\u062A\u0645\u062E": {
-	        "initial": "\uFD57"
-	    },
-	    "\u062C\u0645\u062D": {
-	        "final": "\uFD58",
-	        "initial": "\uFD59"
-	    },
-	    "\u062D\u0645\u064A": {
-	        "final": "\uFD5A"
-	    },
-	    "\u062D\u0645\u0649": {
-	        "final": "\uFD5B"
-	    },
-	    "\u0633\u062D\u062C": {
-	        "initial": "\uFD5C"
-	    },
-	    "\u0633\u062C\u062D": {
-	        "initial": "\uFD5D"
-	    },
-	    "\u0633\u062C\u0649": {
-	        "final": "\uFD5E"
-	    },
-	    "\u0633\u0645\u062D": {
-	        "final": "\uFD5F",
-	        "initial": "\uFD60"
-	    },
-	    "\u0633\u0645\u062C": {
-	        "initial": "\uFD61"
-	    },
-	    "\u0633\u0645\u0645": {
-	        "final": "\uFD62",
-	        "initial": "\uFD63"
-	    },
-	    "\u0635\u062D\u062D": {
-	        "final": "\uFD64",
-	        "initial": "\uFD65"
-	    },
-	    "\u0635\u0645\u0645": {
-	        "final": "\uFD66",
-	        "initial": "\uFDC5"
-	    },
-	    "\u0634\u062D\u0645": {
-	        "final": "\uFD67",
-	        "initial": "\uFD68"
-	    },
-	    "\u0634\u062C\u064A": {
-	        "final": "\uFD69"
-	    },
-	    "\u0634\u0645\u062E": {
-	        "final": "\uFD6A",
-	        "initial": "\uFD6B"
-	    },
-	    "\u0634\u0645\u0645": {
-	        "final": "\uFD6C",
-	        "initial": "\uFD6D"
-	    },
-	    "\u0636\u062D\u0649": {
-	        "final": "\uFD6E"
-	    },
-	    "\u0636\u062E\u0645": {
-	        "final": "\uFD6F",
-	        "initial": "\uFD70"
-	    },
-	    "\u0636\u0645\u062D": {
-	        "final": "\uFD71"
-	    },
-	    "\u0637\u0645\u062D": {
-	        "initial": "\uFD72"
-	    },
-	    "\u0637\u0645\u0645": {
-	        "initial": "\uFD73"
-	    },
-	    "\u0637\u0645\u064A": {
-	        "final": "\uFD74"
-	    },
-	    "\u0639\u062C\u0645": {
-	        "final": "\uFD75",
-	        "initial": "\uFDC4"
-	    },
-	    "\u0639\u0645\u0645": {
-	        "final": "\uFD76",
-	        "initial": "\uFD77"
-	    },
-	    "\u0639\u0645\u0649": {
-	        "final": "\uFD78"
-	    },
-	    "\u063A\u0645\u0645": {
-	        "final": "\uFD79"
-	    },
-	    "\u063A\u0645\u064A": {
-	        "final": "\uFD7A"
-	    },
-	    "\u063A\u0645\u0649": {
-	        "final": "\uFD7B"
-	    },
-	    "\u0641\u062E\u0645": {
-	        "final": "\uFD7C",
-	        "initial": "\uFD7D"
-	    },
-	    "\u0642\u0645\u062D": {
-	        "final": "\uFD7E",
-	        "initial": "\uFDB4"
-	    },
-	    "\u0642\u0645\u0645": {
-	        "final": "\uFD7F"
-	    },
-	    "\u0644\u062D\u0645": {
-	        "final": "\uFD80",
-	        "initial": "\uFDB5"
-	    },
-	    "\u0644\u062D\u064A": {
-	        "final": "\uFD81"
-	    },
-	    "\u0644\u062D\u0649": {
-	        "final": "\uFD82"
-	    },
-	    "\u0644\u062C\u062C": {
-	        "initial": "\uFD83",
-	        "final": "\uFD84"
-	    },
-	    "\u0644\u062E\u0645": {
-	        "final": "\uFD85",
-	        "initial": "\uFD86"
-	    },
-	    "\u0644\u0645\u062D": {
-	        "final": "\uFD87",
-	        "initial": "\uFD88"
-	    },
-	    "\u0645\u062D\u062C": {
-	        "initial": "\uFD89"
-	    },
-	    "\u0645\u062D\u0645": {
-	        "initial": "\uFD8A"
-	    },
-	    "\u0645\u062D\u064A": {
-	        "final": "\uFD8B"
-	    },
-	    "\u0645\u062C\u062D": {
-	        "initial": "\uFD8C"
-	    },
-	    "\u0645\u062C\u0645": {
-	        "initial": "\uFD8D"
-	    },
-	    "\u0645\u062E\u062C": {
-	        "initial": "\uFD8E"
-	    },
-	    "\u0645\u062E\u0645": {
-	        "initial": "\uFD8F"
-	    },
-	    "\u0645\u062C\u062E": {
-	        "initial": "\uFD92"
-	    },
-	    "\u0647\u0645\u062C": {
-	        "initial": "\uFD93"
-	    },
-	    "\u0647\u0645\u0645": {
-	        "initial": "\uFD94"
-	    },
-	    "\u0646\u062D\u0645": {
-	        "initial": "\uFD95"
-	    },
-	    "\u0646\u062D\u0649": {
-	        "final": "\uFD96"
-	    },
-	    "\u0646\u062C\u0645": {
-	        "final": "\uFD97",
-	        "initial": "\uFD98"
-	    },
-	    "\u0646\u062C\u0649": {
-	        "final": "\uFD99"
-	    },
-	    "\u0646\u0645\u064A": {
-	        "final": "\uFD9A"
-	    },
-	    "\u0646\u0645\u0649": {
-	        "final": "\uFD9B"
-	    },
-	    "\u064A\u0645\u0645": {
-	        "final": "\uFD9C",
-	        "initial": "\uFD9D"
-	    },
-	    "\u0628\u062E\u064A": {
-	        "final": "\uFD9E"
-	    },
-	    "\u062A\u062C\u064A": {
-	        "final": "\uFD9F"
-	    },
-	    "\u062A\u062C\u0649": {
-	        "final": "\uFDA0"
-	    },
-	    "\u062A\u062E\u064A": {
-	        "final": "\uFDA1"
-	    },
-	    "\u062A\u062E\u0649": {
-	        "final": "\uFDA2"
-	    },
-	    "\u062A\u0645\u064A": {
-	        "final": "\uFDA3"
-	    },
-	    "\u062A\u0645\u0649": {
-	        "final": "\uFDA4"
-	    },
-	    "\u062C\u0645\u064A": {
-	        "final": "\uFDA5"
-	    },
-	    "\u062C\u062D\u0649": {
-	        "final": "\uFDA6"
-	    },
-	    "\u062C\u0645\u0649": {
-	        "final": "\uFDA7"
-	    },
-	    "\u0633\u062E\u0649": {
-	        "final": "\uFDA8"
-	    },
-	    "\u0635\u062D\u064A": {
-	        "final": "\uFDA9"
-	    },
-	    "\u0634\u062D\u064A": {
-	        "final": "\uFDAA"
-	    },
-	    "\u0636\u062D\u064A": {
-	        "final": "\uFDAB"
-	    },
-	    "\u0644\u062C\u064A": {
-	        "final": "\uFDAC"
-	    },
-	    "\u0644\u0645\u064A": {
-	        "final": "\uFDAD"
-	    },
-	    "\u064A\u062D\u064A": {
-	        "final": "\uFDAE"
-	    },
-	    "\u064A\u062C\u064A": {
-	        "final": "\uFDAF"
-	    },
-	    "\u064A\u0645\u064A": {
-	        "final": "\uFDB0"
-	    },
-	    "\u0645\u0645\u064A": {
-	        "final": "\uFDB1"
-	    },
-	    "\u0642\u0645\u064A": {
-	        "final": "\uFDB2"
-	    },
-	    "\u0646\u062D\u064A": {
-	        "final": "\uFDB3"
-	    },
-	    "\u0639\u0645\u064A": {
-	        "final": "\uFDB6"
-	    },
-	    "\u0643\u0645\u064A": {
-	        "final": "\uFDB7"
-	    },
-	    "\u0646\u062C\u062D": {
-	        "initial": "\uFDB8",
-	        "final": "\uFDBD"
-	    },
-	    "\u0645\u062E\u064A": {
-	        "final": "\uFDB9"
-	    },
-	    "\u0644\u062C\u0645": {
-	        "initial": "\uFDBA",
-	        "final": "\uFDBC"
-	    },
-	    "\u0643\u0645\u0645": {
-	        "final": "\uFDBB",
-	        "initial": "\uFDC3"
-	    },
-	    "\u062C\u062D\u064A": {
-	        "final": "\uFDBE"
-	    },
-	    "\u062D\u062C\u064A": {
-	        "final": "\uFDBF"
-	    },
-	    "\u0645\u062C\u064A": {
-	        "final": "\uFDC0"
-	    },
-	    "\u0641\u0645\u064A": {
-	        "final": "\uFDC1"
-	    },
-	    "\u0628\u062D\u064A": {
-	        "final": "\uFDC2"
-	    },
-	    "\u0633\u062E\u064A": {
-	        "final": "\uFDC6"
-	    },
-	    "\u0646\u062C\u064A": {
-	        "final": "\uFDC7"
-	    },
-	    "\u0644\u0622": {
-	        "isolated": "\uFEF5",
-	        "final": "\uFEF6"
-	    },
-	    "\u0644\u0623": {
-	        "isolated": "\uFEF7",
-	        "final": "\uFEF8"
-	    },
-	    "\u0644\u0625": {
-	        "isolated": "\uFEF9",
-	        "final": "\uFEFA"
-	    },
-	    "\u0644\u0627": {
-	        "isolated": "\uFEFB",
-	        "final": "\uFEFC"
-	    },
-	    "words": {
-	        "\u0635\u0644\u06D2": "\uFDF0",
-	        "\u0642\u0644\u06D2": "\uFDF1",
-	        "\u0627\u0644\u0644\u0647": "\uFDF2",
-	        "\u0627\u0643\u0628\u0631": "\uFDF3",
-	        "\u0645\u062D\u0645\u062F": "\uFDF4",
-	        "\u0635\u0644\u0639\u0645": "\uFDF5",
-	        "\u0631\u0633\u0648\u0644": "\uFDF6",
-	        "\u0639\u0644\u064A\u0647": "\uFDF7",
-	        "\u0648\u0633\u0644\u0645": "\uFDF8",
-	        "\u0635\u0644\u0649": "\uFDF9",
-	        "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
-	        "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
-	        "\u0631\u06CC\u0627\u0644": "\uFDFC"
-	    }
-	};
-	exports.default = ligatureReference;
-	});
-
-	var reference = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-	var letterList = Object.keys(unicodeArabic.default);
-	exports.letterList = letterList;
-	var ligatureList = Object.keys(unicodeLigatures.default);
-	exports.ligatureList = ligatureList;
-	var ligatureWordList = Object.keys(unicodeLigatures.default.words);
-	exports.ligatureWordList = ligatureWordList;
-	var lams = '\u0644\u06B5\u06B6\u06B7\u06B8';
-	exports.lams = lams;
-	var alefs = '\u0627\u0622\u0623\u0625\u0671\u0672\u0673\u0675\u0773\u0774';
-	exports.alefs = alefs;
-	// for (var l = 1; l < lams.length; l++) {
-	//   console.log('-');
-	//   for (var a = 0; a < alefs.length; a++) {
-	//     console.log(a + ': ' + lams[l] + alefs[a]);
-	//   }
-	// }
-	var tashkeel = '\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8';
-	exports.tashkeel = tashkeel;
-	function addToTashkeel(start, finish) {
-	    for (var i = start; i <= finish; i++) {
-	        exports.tashkeel = tashkeel += String.fromCharCode(i);
-	    }
-	}
-	addToTashkeel(0x0610, 0x061A);
-	addToTashkeel(0x064B, 0x065F);
-	addToTashkeel(0x06D6, 0x06DC);
-	addToTashkeel(0x06E0, 0x06E4);
-	addToTashkeel(0x06EA, 0x06ED);
-	addToTashkeel(0x08D3, 0x08E1);
-	addToTashkeel(0x08E3, 0x08FF);
-	addToTashkeel(0xFE70, 0xFE7F);
-	var lineBreakers = '\u0627\u0629\u0648\u06C0\u06CF\u06FD\u06FE\u076B\u076C\u0771\u0773\u0774\u0778\u0779\u08E2\u08B1\u08B2\u08B9';
-	exports.lineBreakers = lineBreakers;
-	function addToLineBreakers(start, finish) {
-	    for (var i = start; i <= finish; i++) {
-	        exports.lineBreakers = lineBreakers += String.fromCharCode(i);
-	    }
-	}
-	addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored
-	addToLineBreakers(0x0621, 0x0625);
-	addToLineBreakers(0x062F, 0x0632);
-	addToLineBreakers(0x0660, 0x066D); // numerals, math
-	addToLineBreakers(0x0671, 0x0677);
-	addToLineBreakers(0x0688, 0x0699);
-	addToLineBreakers(0x06C3, 0x06CB);
-	addToLineBreakers(0x06D2, 0x06F9);
-	addToLineBreakers(0x0759, 0x075B);
-	addToLineBreakers(0x08AA, 0x08AE);
-	addToLineBreakers(0xFB50, 0xFDFD); // presentation forms look like they could connect, but never do
-	// Presentation Forms A includes diacritics but they are meant to stand alone
-	addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
-	// numerals, math
-	addToLineBreakers(0x10E60, 0x10E7F);
-	addToLineBreakers(0x1EC70, 0x1ECBF);
-	addToLineBreakers(0x1EE00, 0x1EEFF);
-	});
-
-	var GlyphSplitter_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-	function GlyphSplitter(word) {
-	    var letters = [];
-	    var lastLetter = '';
-	    word.split('').forEach(function (letter) {
-	        if (isArabic_1.isArabic(letter)) {
-	            if (reference.tashkeel.indexOf(letter) > -1) {
-	                letters[letters.length - 1] += letter;
-	            }
-	            else if (lastLetter.length && ((reference.lams.indexOf(lastLetter) === 0 && reference.alefs.indexOf(letter) > -1) || (reference.lams.indexOf(lastLetter) > 0 && reference.alefs.indexOf(letter) === 0))) {
-	                // valid LA forms
-	                letters[letters.length - 1] += letter;
-	            }
-	            else {
-	                letters.push(letter);
-	            }
-	        }
-	        else {
-	            letters.push(letter);
-	        }
-	        if (reference.tashkeel.indexOf(letter) === -1) {
-	            lastLetter = letter;
-	        }
-	    });
-	    return letters;
-	}
-	exports.GlyphSplitter = GlyphSplitter;
-	});
-
-	var BaselineSplitter_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-	function BaselineSplitter(word) {
-	    var letters = [];
-	    var lastLetter = '';
-	    word.split('').forEach(function (letter) {
-	        if (isArabic_1.isArabic(letter) && isArabic_1.isArabic(lastLetter)) {
-	            if (lastLetter.length && reference.tashkeel.indexOf(letter) > -1) {
-	                letters[letters.length - 1] += letter;
-	            }
-	            else if (reference.lineBreakers.indexOf(lastLetter) > -1) {
-	                letters.push(letter);
-	            }
-	            else {
-	                letters[letters.length - 1] += letter;
-	            }
-	        }
-	        else {
-	            letters.push(letter);
-	        }
-	        if (reference.tashkeel.indexOf(letter) === -1) {
-	            // don't allow tashkeel to hide line break
-	            lastLetter = letter;
-	        }
-	    });
-	    return letters;
-	}
-	exports.BaselineSplitter = BaselineSplitter;
-	});
-
-	var Normalization = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-
-	function Normal(word, breakPresentationForm) {
-	    // default is to turn initial/isolated/medial/final presentation form to generic
-	    if (typeof breakPresentationForm === 'undefined') {
-	        breakPresentationForm = true;
-	    }
-	    var returnable = '';
-	    word.split('').forEach(function (letter) {
-	        if (!isArabic_1.isArabic(letter)) {
-	            returnable += letter;
-	            return;
-	        }
-	        for (var w = 0; w < reference.letterList.length; w++) {
-	            // ok so we are checking this potential lettertron
-	            var letterForms = unicodeArabic.default[reference.letterList[w]];
-	            var versions = Object.keys(letterForms);
-	            for (var v = 0; v < versions.length; v++) {
-	                var localVersion = letterForms[versions[v]];
-	                if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-	                    // look at this embedded object
-	                    var embeddedForms = Object.keys(localVersion);
-	                    for (var ef = 0; ef < embeddedForms.length; ef++) {
-	                        var form = localVersion[embeddedForms[ef]];
-	                        if (form === letter || (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1)) {
-	                            // match
-	                            // console.log('embedded match');
-	                            if (form === letter) {
-	                                // match exact
-	                                if (breakPresentationForm && localVersion['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(embeddedForms[ef]) > -1) {
-	                                    // replace presentation form
-	                                    // console.log('keeping normal form of the letter');
-	                                    if (typeof localVersion['normal'] === 'object') {
-	                                        returnable += localVersion['normal'][0];
-	                                    }
-	                                    else {
-	                                        returnable += localVersion['normal'];
-	                                    }
-	                                    return;
-	                                }
-	                                // console.log('keeping this letter');
-	                                returnable += letter;
-	                                return;
-	                            }
-	                            else if (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1) {
-	                                // match
-	                                returnable += form[0];
-	                                // console.log('added the first letter from the same array');
-	                                return;
-	                            }
-	                        }
-	                    }
-	                }
-	                else if (localVersion === letter) {
-	                    // match exact
-	                    if (breakPresentationForm && letterForms['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(versions[v]) > -1) {
-	                        // replace presentation form
-	                        // console.log('keeping normal form of the letter');
-	                        if (typeof letterForms['normal'] === 'object') {
-	                            returnable += letterForms['normal'][0];
-	                        }
-	                        else {
-	                            returnable += letterForms['normal'];
-	                        }
-	                        return;
-	                    }
-	                    // console.log('keeping this letter');
-	                    returnable += letter;
-	                    return;
-	                }
-	                else if (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
-	                    // match
-	                    returnable += localVersion[0];
-	                    // console.log('added the first letter from the same array');
-	                    return;
-	                }
-	            }
-	        }
-	        // try ligatures
-	        for (var v2 = 0; v2 < reference.ligatureList.length; v2++) {
-	            var normalForm = reference.ligatureList[v2];
-	            if (normalForm !== 'words') {
-	                var ligForms = Object.keys(unicodeLigatures.default[normalForm]);
-	                for (var f = 0; f < ligForms.length; f++) {
-	                    if (unicodeLigatures.default[normalForm][ligForms[f]] === letter) {
-	                        returnable += normalForm;
-	                        return;
-	                    }
-	                }
-	            }
-	        }
-	        // try words ligatures
-	        for (var v3 = 0; v3 < reference.ligatureWordList.length; v3++) {
-	            var normalForm$1 = reference.ligatureWordList[v3];
-	            if (unicodeLigatures.default.words[normalForm$1] === letter) {
-	                returnable += normalForm$1;
-	                return;
-	            }
-	        }
-	        returnable += letter;
-	        // console.log('kept the letter')
-	    });
-	    return returnable;
-	}
-	exports.Normal = Normal;
-	});
-
-	var CharShaper_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-	function CharShaper(letter, form) {
-	    if (!isArabic_1.isArabic(letter)) {
-	        // fail not Arabic
-	        throw new Error('Not Arabic');
-	    }
-	    if (letter === "\u0621") {
-	        // hamza alone
-	        return "\u0621";
-	    }
-	    for (var w = 0; w < reference.letterList.length; w++) {
-	        // ok so we are checking this potential lettertron
-	        var letterForms = unicodeArabic.default[reference.letterList[w]];
-	        var versions = Object.keys(letterForms);
-	        for (var v = 0; v < versions.length; v++) {
-	            var localVersion = letterForms[versions[v]];
-	            if ((localVersion === letter) ||
-	                (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1)) {
-	                if (versions.indexOf(form) > -1) {
-	                    return letterForms[form];
-	                }
-	            }
-	            else if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-	                // check embedded
-	                var embeddedVersions = Object.keys(localVersion);
-	                for (var ev = 0; ev < embeddedVersions.length; ev++) {
-	                    if ((localVersion[embeddedVersions[ev]] === letter) ||
-	                        (typeof localVersion[embeddedVersions[ev]] === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1)) {
-	                        if (embeddedVersions.indexOf(form) > -1) {
-	                            return localVersion[form];
-	                        }
-	                    }
-	                }
-	            }
-	        }
-	    }
-	}
-	exports.CharShaper = CharShaper;
-	});
-
-	var WordShaper_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-
-	function WordShaper(word) {
-	    var state = 'initial';
-	    var output = '';
-	    for (var w = 0; w < word.length; w++) {
-	        var nextLetter = ' ';
-	        for (var nxw = w + 1; nxw < word.length; nxw++) {
-	            if (!isArabic_1.isArabic(word[nxw])) {
-	                break;
-	            }
-	            if (reference.tashkeel.indexOf(word[nxw]) === -1) {
-	                nextLetter = word[nxw];
-	                break;
-	            }
-	        }
-	        if (!isArabic_1.isArabic(word[w]) || isArabic_1.isMath(word[w])) {
-	            // space or other non-Arabic
-	            output += word[w];
-	            state = 'initial';
-	        }
-	        else if (reference.tashkeel.indexOf(word[w]) > -1) {
-	            // tashkeel - add without changing state
-	            output += word[w];
-	        }
-	        else if ((nextLetter === ' ') // last Arabic letter in this word
-	            || (reference.lineBreakers.indexOf(word[w]) > -1)) { // the current letter is known to break lines
-	            output += CharShaper_1.CharShaper(word[w], state === 'initial' ? 'isolated' : 'final');
-	            state = 'initial';
-	        }
-	        else if (reference.lams.indexOf(word[w]) > -1 && reference.alefs.indexOf(nextLetter) > -1) {
-	            // LA letters - advance an additional letter after this
-	            output += unicodeLigatures.default[word[w] + nextLetter][(state === 'initial' ? 'isolated' : 'final')];
-	            while (word[w] !== nextLetter) {
-	                w++;
-	            }
-	            state = 'initial';
-	        }
-	        else {
-	            output += CharShaper_1.CharShaper(word[w], state);
-	            state = 'medial';
-	        }
-	    }
-	    return output;
-	}
-	exports.WordShaper = WordShaper;
-	});
-
-	var ParentLetter_1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-	function ParentLetter(letter) {
-	    if (!isArabic_1.isArabic(letter)) {
-	        throw new Error('Not an Arabic letter');
-	    }
-	    for (var w = 0; w < reference.letterList.length; w++) {
-	        // ok so we are checking this potential lettertron
-	        var letterForms = unicodeArabic.default[reference.letterList[w]];
-	        var versions = Object.keys(letterForms);
-	        for (var v = 0; v < versions.length; v++) {
-	            var localVersion = letterForms[versions[v]];
-	            if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-	                // look at this embedded object
-	                var embeddedForms = Object.keys(localVersion);
-	                for (var ef = 0; ef < embeddedForms.length; ef++) {
-	                    var form = localVersion[embeddedForms[ef]];
-	                    if (form === letter || (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1)) {
-	                        // match
-	                        return localVersion;
-	                    }
-	                }
-	            }
-	            else if (localVersion === letter || (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1)) {
-	                // match
-	                return letterForms;
-	            }
-	        }
-	        return null;
-	    }
-	}
-	exports.ParentLetter = ParentLetter;
-	function GrandparentLetter(letter) {
-	    if (!isArabic_1.isArabic(letter)) {
-	        throw new Error('Not an Arabic letter');
-	    }
-	    for (var w = 0; w < reference.letterList.length; w++) {
-	        // ok so we are checking this potential lettertron
-	        var letterForms = unicodeArabic.default[reference.letterList[w]];
-	        var versions = Object.keys(letterForms);
-	        for (var v = 0; v < versions.length; v++) {
-	            var localVersion = letterForms[versions[v]];
-	            if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-	                // look at this embedded object
-	                var embeddedForms = Object.keys(localVersion);
-	                for (var ef = 0; ef < embeddedForms.length; ef++) {
-	                    var form = localVersion[embeddedForms[ef]];
-	                    if (form === letter || (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1)) {
-	                        // match
-	                        return letterForms;
-	                    }
-	                }
-	            }
-	            else if (localVersion === letter || (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1)) {
-	                // match
-	                return letterForms;
-	            }
-	        }
-	        return null;
-	    }
-	}
-	exports.GrandparentLetter = GrandparentLetter;
-	});
-
-	var lib$1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-
-	exports.isArabic = isArabic_1.isArabic;
-
-	exports.GlyphSplitter = GlyphSplitter_1.GlyphSplitter;
-
-	exports.BaselineSplitter = BaselineSplitter_1.BaselineSplitter;
-
-	exports.Normal = Normalization.Normal;
-
-	exports.CharShaper = CharShaper_1.CharShaper;
-
-	exports.WordShaper = WordShaper_1.WordShaper;
-
-	exports.ParentLetter = ParentLetter_1.ParentLetter;
-	exports.GrandparentLetter = ParentLetter_1.GrandparentLetter;
-	});
-
-	// see https://github.com/openstreetmap/iD/pull/3707
-
-	var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u07BF\u08A0–\u08BF]/;
-
-	function fixRTLTextForSvg(inputText) {
-	    var ret = '', rtlBuffer = [];
-	    var arabicRegex = /[\u0600-\u06FF]/g;
-	    var arabicDiacritics = /[\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06ED]/g;
-	    var arabicMath = /[\u0660-\u066C\u06F0-\u06F9]+/g;
-	    var thaanaVowel = /[\u07A6-\u07B0]/;
-	    var hebrewSign = /[\u0591-\u05bd\u05bf\u05c1-\u05c5\u05c7]/;
-
-	    // Arabic word shaping
-	    if (arabicRegex.test(inputText)) {
-	        inputText = lib$1.WordShaper(inputText);
-	    }
-
-	    for (var n = 0; n < inputText.length; n++) {
-	        var c = inputText[n];
-	        if (arabicMath.test(c)) {
-	            // Arabic numbers go LTR
-	            ret += rtlBuffer.reverse().join('');
-	            rtlBuffer = [c];
-	        } else {
-	            if (rtlBuffer.length && arabicMath.test(rtlBuffer[rtlBuffer.length - 1])) {
-	                ret += rtlBuffer.reverse().join('');
-	                rtlBuffer = [];
-	            }
-	            if ((thaanaVowel.test(c) || hebrewSign.test(c) || arabicDiacritics.test(c)) && rtlBuffer.length) {
-	                rtlBuffer[rtlBuffer.length - 1] += c;
-	            } else if (rtlRegex.test(c)
-	                // include Arabic presentation forms
-	                || (c.charCodeAt(0) >= 64336 && c.charCodeAt(0) <= 65023)
-	                || (c.charCodeAt(0) >= 65136 && c.charCodeAt(0) <= 65279)) {
-	                rtlBuffer.push(c);
-	            } else if (c === ' ' && rtlBuffer.length) {
-	                // whitespace within RTL text
-	                rtlBuffer = [rtlBuffer.reverse().join('') + ' '];
-	            } else {
-	                // non-RTL character
-	                ret += rtlBuffer.reverse().join('') + c;
-	                rtlBuffer = [];
-	            }
-	        }
-	    }
-	    ret += rtlBuffer.reverse().join('');
-	    return ret;
-	}
-
-	// https://github.com/openstreetmap/iD/issues/772
-	// http://mathiasbynens.be/notes/localstorage-pattern#comment-9
-	var _storage;
-	try { _storage = localStorage; } catch (e) {}  // eslint-disable-line no-empty
-	_storage = _storage || (function () {
-	  var s = {};
-	  return {
-	    getItem: function (k) { return s[k]; },
-	    setItem: function (k, v) { return s[k] = v; },
-	    removeItem: function (k) { return delete s[k]; }
-	  };
-	})();
-
-	//
-	// corePreferences is an interface for persisting basic key-value strings
-	// within and between iD sessions on the same site.
-	//
-	function corePreferences(k, v) {
-
-	  try {
-	    if (arguments.length === 1) { return _storage.getItem(k); }
-	    else if (v === null) { _storage.removeItem(k); }
-	    else { _storage.setItem(k, v); }
-	  } catch (e) {
-	    /* eslint-disable no-console */
-	    if (typeof console !== 'undefined') {
-	      console.error('localStorage quota exceeded');
-	    }
-	    /* eslint-enable no-console */
-	  }
-
-	}
-
-	function responseText(response) {
-	  if (!response.ok) { throw new Error(response.status + " " + response.statusText); }
-	  return response.text();
-	}
-
-	function d3_text(input, init) {
-	  return fetch(input, init).then(responseText);
-	}
-
-	function responseJson(response) {
-	  if (!response.ok) { throw new Error(response.status + " " + response.statusText); }
-	  if (response.status === 204 || response.status === 205) { return; }
-	  return response.json();
-	}
-
-	function d3_json(input, init) {
-	  return fetch(input, init).then(responseJson);
-	}
-
-	function parser(type) {
-	  return function(input, init)  {
-	    return d3_text(input, init).then(function(text) {
-	      return (new DOMParser).parseFromString(text, type);
-	    });
-	  };
-	}
-
-	var d3_xml = parser("application/xml");
-
-	var svg = parser("image/svg+xml");
-
-	var _mainFileFetcher = coreFileFetcher(); // singleton
-
-	//
-	// coreFileFetcher asynchronously fetches data from JSON files
-	//
-	function coreFileFetcher() {
-	  var _this = {};
-	  var _inflight = {};
-	  var _fileMap = {
-	    'address_formats': 'data/address_formats.min.json',
-	    'deprecated': 'data/deprecated.min.json',
-	    'discarded': 'data/discarded.min.json',
-	    'imagery': 'data/imagery.min.json',
-	    'intro_graph': 'data/intro_graph.min.json',
-	    'keepRight': 'data/keepRight.min.json',
-	    'languages': 'data/languages.min.json',
-	    'locales': 'data/locales.min.json',
-	    'nsi_brands': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@4/dist/brands.min.json',
-	    'nsi_filters': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@4/dist/filters.min.json',
-	    'oci_features': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/features.min.json',
-	    'oci_resources': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/resources.min.json',
-	    'preset_categories': 'data/preset_categories.min.json',
-	    'preset_defaults': 'data/preset_defaults.min.json',
-	    'preset_fields': 'data/preset_fields.min.json',
-	    'preset_presets': 'data/preset_presets.min.json',
-	    'phone_formats': 'data/phone_formats.min.json',
-	    'qa_data': 'data/qa_data.min.json',
-	    'shortcuts': 'data/shortcuts.min.json',
-	    'territory_languages': 'data/territory_languages.min.json',
-	    'wmf_sitematrix': 'https://cdn.jsdelivr.net/npm/wmf-sitematrix@0.1/wikipedia.min.json'
-	  };
-
-	  var _cachedData = {};
-	  // expose the cache; useful for tests
-	  _this.cache = function () { return _cachedData; };
-
-
-	  // Returns a Promise to fetch data
-	  // (resolved with the data if we have it already)
-	  _this.get = function (which) {
-	    if (_cachedData[which]) {
-	      return Promise.resolve(_cachedData[which]);
-	    }
-
-	    var file = _fileMap[which];
-	    var url = file && _this.asset(file);
-	    if (!url) {
-	      return Promise.reject(("Unknown data file for \"" + which + "\""));
-	    }
-
-	    var prom = _inflight[url];
-	    if (!prom) {
-	      _inflight[url] = prom = d3_json(url)
-	        .then(function (result) {
-	          delete _inflight[url];
-	          if (!result) {
-	            throw new Error(("No data loaded for \"" + which + "\""));
-	          }
-	          _cachedData[which] = result;
-	          return result;
-	        })
-	        .catch(function (err) {
-	          delete _inflight[url];
-	          throw err;
-	        });
-	    }
-
-	    return prom;
-	  };
-
-
-	  // Accessor for the file map
-	  _this.fileMap = function(val) {
-	    if (!arguments.length) { return _fileMap; }
-	    _fileMap = val;
-	    return _this;
-	  };
-
-	  var _assetPath = '';
-	  _this.assetPath = function(val) {
-	    if (!arguments.length) { return _assetPath; }
-	    _assetPath = val;
-	    return _this;
-	  };
-
-	  var _assetMap = {};
-	  _this.assetMap = function(val) {
-	    if (!arguments.length) { return _assetMap; }
-	    _assetMap = val;
-	    return _this;
-	  };
-
-	  _this.asset = function (val) {
-	    if (/^http(s)?:\/\//i.test(val)) { return val; }
-	    var filename = _assetPath + val;
-	    return _assetMap[filename] || filename;
-	  };
-
-	  return _this;
-	}
-
-	var _detected;
-
-	function utilDetect(refresh) {
-	  if (_detected && !refresh) { return _detected; }
-	  _detected = {};
-
-	  var ua = navigator.userAgent;
-	  var m = null;
-
-	  /* Browser */
-	  m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i);   // Edge
-	  if (m !== null) {
-	    _detected.browser = m[1];
-	    _detected.version = m[2];
-	  }
-	  if (!_detected.browser) {
-	    m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i);   // IE11
-	    if (m !== null) {
-	      _detected.browser = 'msie';
-	      _detected.version = m[1];
-	    }
-	  }
-	  if (!_detected.browser) {
-	    m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i);   // Opera 15+
-	    if (m !== null) {
-	      _detected.browser = 'Opera';
-	      _detected.version = m[2];
-	    }
-	  }
-	  if (!_detected.browser) {
-	    m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
-	    if (m !== null) {
-	      _detected.browser = m[1];
-	      _detected.version = m[2];
-	      m = ua.match(/version\/([\.\d]+)/i);
-	      if (m !== null) { _detected.version = m[1]; }
-	    }
-	  }
-	  if (!_detected.browser) {
-	    _detected.browser = navigator.appName;
-	    _detected.version = navigator.appVersion;
-	  }
-
-	  // keep major.minor version only..
-	  _detected.version = _detected.version.split(/\W/).slice(0,2).join('.');
-
-	  // detect other browser capabilities
-	  // Legacy Opera has incomplete svg style support. See #715
-	  _detected.opera = (_detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15 );
-
-	  if (_detected.browser.toLowerCase() === 'msie') {
-	    _detected.ie = true;
-	    _detected.browser = 'Internet Explorer';
-	    _detected.support = parseFloat(_detected.version) >= 11;
-	  } else {
-	    _detected.ie = false;
-	    _detected.support = true;
-	  }
-
-	  _detected.filedrop = (window.FileReader && 'ondrop' in window);
-	  _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
-	  _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
-
-
-	  /* Platform */
-	  if (/Win/.test(ua)) {
-	    _detected.os = 'win';
-	    _detected.platform = 'Windows';
-	  } else if (/Mac/.test(ua)) {
-	    _detected.os = 'mac';
-	    _detected.platform = 'Macintosh';
-	  } else if (/X11/.test(ua) || /Linux/.test(ua)) {
-	    _detected.os = 'linux';
-	    _detected.platform = 'Linux';
-	  } else {
-	    _detected.os = 'win';
-	    _detected.platform = 'Unknown';
-	  }
-
-	  _detected.isMobileWebKit = (/\b(iPad|iPhone|iPod)\b/.test(ua) ||
-	    // HACK: iPadOS 13+ requests desktop sites by default by using a Mac user agent,
-	    // so assume any "mac" with multitouch is actually iOS
-	    (navigator.platform === 'MacIntel' && 'maxTouchPoints' in navigator && navigator.maxTouchPoints > 1)) &&
-	    /WebKit/.test(ua) &&
-	    !/Edge/.test(ua) &&
-	    !window.MSStream;
-
-
-	  /* Locale */
-	  // An array of locales requested by the browser in priority order.
-	  _detected.browserLocales = Array.from(new Set( // remove duplicates
-	      [navigator.language]
-	        .concat(navigator.languages || [])
-	        .concat([
-	            // old property for backwards compatibility
-	            navigator.userLanguage,
-	            // fallback to English
-	            'en'
-	        ])
-	        // remove any undefined values
-	        .filter(Boolean)
-	    ));
-
-
-	  /* Host */
-	  var loc = window.top.location;
-	  var origin = loc.origin;
-	  if (!origin) {  // for unpatched IE11
-	    origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port: '');
-	  }
-
-	  _detected.host = origin + loc.pathname;
-
-
-	  return _detected;
-	}
-
-	var aesJs = createCommonjsModule(function (module, exports) {
-	/*! MIT License. Copyright 2015-2018 Richard Moore <me@ricmoo.com>. See LICENSE.txt. */
-	(function(root) {
-
-	    function checkInt(value) {
-	        return (parseInt(value) === value);
-	    }
-
-	    function checkInts(arrayish) {
-	        if (!checkInt(arrayish.length)) { return false; }
-
-	        for (var i = 0; i < arrayish.length; i++) {
-	            if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
-	                return false;
-	            }
-	        }
-
-	        return true;
-	    }
-
-	    function coerceArray(arg, copy) {
-
-	        // ArrayBuffer view
-	        if (arg.buffer && arg.name === 'Uint8Array') {
-
-	            if (copy) {
-	                if (arg.slice) {
-	                    arg = arg.slice();
-	                } else {
-	                    arg = Array.prototype.slice.call(arg);
-	                }
-	            }
-
-	            return arg;
-	        }
-
-	        // It's an array; check it is a valid representation of a byte
-	        if (Array.isArray(arg)) {
-	            if (!checkInts(arg)) {
-	                throw new Error('Array contains invalid value: ' + arg);
-	            }
-
-	            return new Uint8Array(arg);
-	        }
-
-	        // Something else, but behaves like an array (maybe a Buffer? Arguments?)
-	        if (checkInt(arg.length) && checkInts(arg)) {
-	            return new Uint8Array(arg);
-	        }
-
-	        throw new Error('unsupported array-like object');
-	    }
-
-	    function createArray(length) {
-	        return new Uint8Array(length);
-	    }
-
-	    function copyArray(sourceArray, targetArray, targetStart, sourceStart, sourceEnd) {
-	        if (sourceStart != null || sourceEnd != null) {
-	            if (sourceArray.slice) {
-	                sourceArray = sourceArray.slice(sourceStart, sourceEnd);
-	            } else {
-	                sourceArray = Array.prototype.slice.call(sourceArray, sourceStart, sourceEnd);
-	            }
-	        }
-	        targetArray.set(sourceArray, targetStart);
-	    }
-
-
-
-	    var convertUtf8 = (function() {
-	        function toBytes(text) {
-	            var result = [], i = 0;
-	            text = encodeURI(text);
-	            while (i < text.length) {
-	                var c = text.charCodeAt(i++);
-
-	                // if it is a % sign, encode the following 2 bytes as a hex value
-	                if (c === 37) {
-	                    result.push(parseInt(text.substr(i, 2), 16));
-	                    i += 2;
-
-	                // otherwise, just the actual byte
-	                } else {
-	                    result.push(c);
-	                }
-	            }
-
-	            return coerceArray(result);
-	        }
-
-	        function fromBytes(bytes) {
-	            var result = [], i = 0;
-
-	            while (i < bytes.length) {
-	                var c = bytes[i];
-
-	                if (c < 128) {
-	                    result.push(String.fromCharCode(c));
-	                    i++;
-	                } else if (c > 191 && c < 224) {
-	                    result.push(String.fromCharCode(((c & 0x1f) << 6) | (bytes[i + 1] & 0x3f)));
-	                    i += 2;
-	                } else {
-	                    result.push(String.fromCharCode(((c & 0x0f) << 12) | ((bytes[i + 1] & 0x3f) << 6) | (bytes[i + 2] & 0x3f)));
-	                    i += 3;
-	                }
-	            }
-
-	            return result.join('');
-	        }
-
-	        return {
-	            toBytes: toBytes,
-	            fromBytes: fromBytes,
-	        }
-	    })();
-
-	    var convertHex = (function() {
-	        function toBytes(text) {
-	            var result = [];
-	            for (var i = 0; i < text.length; i += 2) {
-	                result.push(parseInt(text.substr(i, 2), 16));
-	            }
-
-	            return result;
-	        }
-
-	        // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
-	        var Hex = '0123456789abcdef';
-
-	        function fromBytes(bytes) {
-	                var result = [];
-	                for (var i = 0; i < bytes.length; i++) {
-	                    var v = bytes[i];
-	                    result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
-	                }
-	                return result.join('');
-	        }
-
-	        return {
-	            toBytes: toBytes,
-	            fromBytes: fromBytes,
-	        }
-	    })();
-
-
-	    // Number of rounds by keysize
-	    var numberOfRounds = {16: 10, 24: 12, 32: 14};
-
-	    // Round constant words
-	    var rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91];
-
-	    // S-box and Inverse S-box (S is for Substitution)
-	    var S = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16];
-	    var Si =[0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d];
-
-	    // Transformations for encryption
-	    var T1 = [0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a];
-	    var T2 = [0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616];
-	    var T3 = [0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16];
-	    var T4 = [0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c];
-
-	    // Transformations for decryption
-	    var T5 = [0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742];
-	    var T6 = [0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857];
-	    var T7 = [0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8];
-	    var T8 = [0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0];
-
-	    // Transformations for decryption key expansion
-	    var U1 = [0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3];
-	    var U2 = [0x00000000, 0x0b0e090d, 0x161c121a, 0x1d121b17, 0x2c382434, 0x27362d39, 0x3a24362e, 0x312a3f23, 0x58704868, 0x537e4165, 0x4e6c5a72, 0x4562537f, 0x74486c5c, 0x7f466551, 0x62547e46, 0x695a774b, 0xb0e090d0, 0xbbee99dd, 0xa6fc82ca, 0xadf28bc7, 0x9cd8b4e4, 0x97d6bde9, 0x8ac4a6fe, 0x81caaff3, 0xe890d8b8, 0xe39ed1b5, 0xfe8ccaa2, 0xf582c3af, 0xc4a8fc8c, 0xcfa6f581, 0xd2b4ee96, 0xd9bae79b, 0x7bdb3bbb, 0x70d532b6, 0x6dc729a1, 0x66c920ac, 0x57e31f8f, 0x5ced1682, 0x41ff0d95, 0x4af10498, 0x23ab73d3, 0x28a57ade, 0x35b761c9, 0x3eb968c4, 0x0f9357e7, 0x049d5eea, 0x198f45fd, 0x12814cf0, 0xcb3bab6b, 0xc035a266, 0xdd27b971, 0xd629b07c, 0xe7038f5f, 0xec0d8652, 0xf11f9d45, 0xfa119448, 0x934be303, 0x9845ea0e, 0x8557f119, 0x8e59f814, 0xbf73c737, 0xb47dce3a, 0xa96fd52d, 0xa261dc20, 0xf6ad766d, 0xfda37f60, 0xe0b16477, 0xebbf6d7a, 0xda955259, 0xd19b5b54, 0xcc894043, 0xc787494e, 0xaedd3e05, 0xa5d33708, 0xb8c12c1f, 0xb3cf2512, 0x82e51a31, 0x89eb133c, 0x94f9082b, 0x9ff70126, 0x464de6bd, 0x4d43efb0, 0x5051f4a7, 0x5b5ffdaa, 0x6a75c289, 0x617bcb84, 0x7c69d093, 0x7767d99e, 0x1e3daed5, 0x1533a7d8, 0x0821bccf, 0x032fb5c2, 0x32058ae1, 0x390b83ec, 0x241998fb, 0x2f1791f6, 0x8d764dd6, 0x867844db, 0x9b6a5fcc, 0x906456c1, 0xa14e69e2, 0xaa4060ef, 0xb7527bf8, 0xbc5c72f5, 0xd50605be, 0xde080cb3, 0xc31a17a4, 0xc8141ea9, 0xf93e218a, 0xf2302887, 0xef223390, 0xe42c3a9d, 0x3d96dd06, 0x3698d40b, 0x2b8acf1c, 0x2084c611, 0x11aef932, 0x1aa0f03f, 0x07b2eb28, 0x0cbce225, 0x65e6956e, 0x6ee89c63, 0x73fa8774, 0x78f48e79, 0x49deb15a, 0x42d0b857, 0x5fc2a340, 0x54ccaa4d, 0xf741ecda, 0xfc4fe5d7, 0xe15dfec0, 0xea53f7cd, 0xdb79c8ee, 0xd077c1e3, 0xcd65daf4, 0xc66bd3f9, 0xaf31a4b2, 0xa43fadbf, 0xb92db6a8, 0xb223bfa5, 0x83098086, 0x8807898b, 0x9515929c, 0x9e1b9b91, 0x47a17c0a, 0x4caf7507, 0x51bd6e10, 0x5ab3671d, 0x6b99583e, 0x60975133, 0x7d854a24, 0x768b4329, 0x1fd13462, 0x14df3d6f, 0x09cd2678, 0x02c32f75, 0x33e91056, 0x38e7195b, 0x25f5024c, 0x2efb0b41, 0x8c9ad761, 0x8794de6c, 0x9a86c57b, 0x9188cc76, 0xa0a2f355, 0xabacfa58, 0xb6bee14f, 0xbdb0e842, 0xd4ea9f09, 0xdfe49604, 0xc2f68d13, 0xc9f8841e, 0xf8d2bb3d, 0xf3dcb230, 0xeecea927, 0xe5c0a02a, 0x3c7a47b1, 0x37744ebc, 0x2a6655ab, 0x21685ca6, 0x10426385, 0x1b4c6a88, 0x065e719f, 0x0d507892, 0x640a0fd9, 0x6f0406d4, 0x72161dc3, 0x791814ce, 0x48322bed, 0x433c22e0, 0x5e2e39f7, 0x552030fa, 0x01ec9ab7, 0x0ae293ba, 0x17f088ad, 0x1cfe81a0, 0x2dd4be83, 0x26dab78e, 0x3bc8ac99, 0x30c6a594, 0x599cd2df, 0x5292dbd2, 0x4f80c0c5, 0x448ec9c8, 0x75a4f6eb, 0x7eaaffe6, 0x63b8e4f1, 0x68b6edfc, 0xb10c0a67, 0xba02036a, 0xa710187d, 0xac1e1170, 0x9d342e53, 0x963a275e, 0x8b283c49, 0x80263544, 0xe97c420f, 0xe2724b02, 0xff605015, 0xf46e5918, 0xc544663b, 0xce4a6f36, 0xd3587421, 0xd8567d2c, 0x7a37a10c, 0x7139a801, 0x6c2bb316, 0x6725ba1b, 0x560f8538, 0x5d018c35, 0x40139722, 0x4b1d9e2f, 0x2247e964, 0x2949e069, 0x345bfb7e, 0x3f55f273, 0x0e7fcd50, 0x0571c45d, 0x1863df4a, 0x136dd647, 0xcad731dc, 0xc1d938d1, 0xdccb23c6, 0xd7c52acb, 0xe6ef15e8, 0xede11ce5, 0xf0f307f2, 0xfbfd0eff, 0x92a779b4, 0x99a970b9, 0x84bb6bae, 0x8fb562a3, 0xbe9f5d80, 0xb591548d, 0xa8834f9a, 0xa38d4697];
-	    var U3 = [0x00000000, 0x0d0b0e09, 0x1a161c12, 0x171d121b, 0x342c3824, 0x3927362d, 0x2e3a2436, 0x23312a3f, 0x68587048, 0x65537e41, 0x724e6c5a, 0x7f456253, 0x5c74486c, 0x517f4665, 0x4662547e, 0x4b695a77, 0xd0b0e090, 0xddbbee99, 0xcaa6fc82, 0xc7adf28b, 0xe49cd8b4, 0xe997d6bd, 0xfe8ac4a6, 0xf381caaf, 0xb8e890d8, 0xb5e39ed1, 0xa2fe8cca, 0xaff582c3, 0x8cc4a8fc, 0x81cfa6f5, 0x96d2b4ee, 0x9bd9bae7, 0xbb7bdb3b, 0xb670d532, 0xa16dc729, 0xac66c920, 0x8f57e31f, 0x825ced16, 0x9541ff0d, 0x984af104, 0xd323ab73, 0xde28a57a, 0xc935b761, 0xc43eb968, 0xe70f9357, 0xea049d5e, 0xfd198f45, 0xf012814c, 0x6bcb3bab, 0x66c035a2, 0x71dd27b9, 0x7cd629b0, 0x5fe7038f, 0x52ec0d86, 0x45f11f9d, 0x48fa1194, 0x03934be3, 0x0e9845ea, 0x198557f1, 0x148e59f8, 0x37bf73c7, 0x3ab47dce, 0x2da96fd5, 0x20a261dc, 0x6df6ad76, 0x60fda37f, 0x77e0b164, 0x7aebbf6d, 0x59da9552, 0x54d19b5b, 0x43cc8940, 0x4ec78749, 0x05aedd3e, 0x08a5d337, 0x1fb8c12c, 0x12b3cf25, 0x3182e51a, 0x3c89eb13, 0x2b94f908, 0x269ff701, 0xbd464de6, 0xb04d43ef, 0xa75051f4, 0xaa5b5ffd, 0x896a75c2, 0x84617bcb, 0x937c69d0, 0x9e7767d9, 0xd51e3dae, 0xd81533a7, 0xcf0821bc, 0xc2032fb5, 0xe132058a, 0xec390b83, 0xfb241998, 0xf62f1791, 0xd68d764d, 0xdb867844, 0xcc9b6a5f, 0xc1906456, 0xe2a14e69, 0xefaa4060, 0xf8b7527b, 0xf5bc5c72, 0xbed50605, 0xb3de080c, 0xa4c31a17, 0xa9c8141e, 0x8af93e21, 0x87f23028, 0x90ef2233, 0x9de42c3a, 0x063d96dd, 0x0b3698d4, 0x1c2b8acf, 0x112084c6, 0x3211aef9, 0x3f1aa0f0, 0x2807b2eb, 0x250cbce2, 0x6e65e695, 0x636ee89c, 0x7473fa87, 0x7978f48e, 0x5a49deb1, 0x5742d0b8, 0x405fc2a3, 0x4d54ccaa, 0xdaf741ec, 0xd7fc4fe5, 0xc0e15dfe, 0xcdea53f7, 0xeedb79c8, 0xe3d077c1, 0xf4cd65da, 0xf9c66bd3, 0xb2af31a4, 0xbfa43fad, 0xa8b92db6, 0xa5b223bf, 0x86830980, 0x8b880789, 0x9c951592, 0x919e1b9b, 0x0a47a17c, 0x074caf75, 0x1051bd6e, 0x1d5ab367, 0x3e6b9958, 0x33609751, 0x247d854a, 0x29768b43, 0x621fd134, 0x6f14df3d, 0x7809cd26, 0x7502c32f, 0x5633e910, 0x5b38e719, 0x4c25f502, 0x412efb0b, 0x618c9ad7, 0x6c8794de, 0x7b9a86c5, 0x769188cc, 0x55a0a2f3, 0x58abacfa, 0x4fb6bee1, 0x42bdb0e8, 0x09d4ea9f, 0x04dfe496, 0x13c2f68d, 0x1ec9f884, 0x3df8d2bb, 0x30f3dcb2, 0x27eecea9, 0x2ae5c0a0, 0xb13c7a47, 0xbc37744e, 0xab2a6655, 0xa621685c, 0x85104263, 0x881b4c6a, 0x9f065e71, 0x920d5078, 0xd9640a0f, 0xd46f0406, 0xc372161d, 0xce791814, 0xed48322b, 0xe0433c22, 0xf75e2e39, 0xfa552030, 0xb701ec9a, 0xba0ae293, 0xad17f088, 0xa01cfe81, 0x832dd4be, 0x8e26dab7, 0x993bc8ac, 0x9430c6a5, 0xdf599cd2, 0xd25292db, 0xc54f80c0, 0xc8448ec9, 0xeb75a4f6, 0xe67eaaff, 0xf163b8e4, 0xfc68b6ed, 0x67b10c0a, 0x6aba0203, 0x7da71018, 0x70ac1e11, 0x539d342e, 0x5e963a27, 0x498b283c, 0x44802635, 0x0fe97c42, 0x02e2724b, 0x15ff6050, 0x18f46e59, 0x3bc54466, 0x36ce4a6f, 0x21d35874, 0x2cd8567d, 0x0c7a37a1, 0x017139a8, 0x166c2bb3, 0x1b6725ba, 0x38560f85, 0x355d018c, 0x22401397, 0x2f4b1d9e, 0x642247e9, 0x692949e0, 0x7e345bfb, 0x733f55f2, 0x500e7fcd, 0x5d0571c4, 0x4a1863df, 0x47136dd6, 0xdccad731, 0xd1c1d938, 0xc6dccb23, 0xcbd7c52a, 0xe8e6ef15, 0xe5ede11c, 0xf2f0f307, 0xfffbfd0e, 0xb492a779, 0xb999a970, 0xae84bb6b, 0xa38fb562, 0x80be9f5d, 0x8db59154, 0x9aa8834f, 0x97a38d46];
-	    var U4 = [0x00000000, 0x090d0b0e, 0x121a161c, 0x1b171d12, 0x24342c38, 0x2d392736, 0x362e3a24, 0x3f23312a, 0x48685870, 0x4165537e, 0x5a724e6c, 0x537f4562, 0x6c5c7448, 0x65517f46, 0x7e466254, 0x774b695a, 0x90d0b0e0, 0x99ddbbee, 0x82caa6fc, 0x8bc7adf2, 0xb4e49cd8, 0xbde997d6, 0xa6fe8ac4, 0xaff381ca, 0xd8b8e890, 0xd1b5e39e, 0xcaa2fe8c, 0xc3aff582, 0xfc8cc4a8, 0xf581cfa6, 0xee96d2b4, 0xe79bd9ba, 0x3bbb7bdb, 0x32b670d5, 0x29a16dc7, 0x20ac66c9, 0x1f8f57e3, 0x16825ced, 0x0d9541ff, 0x04984af1, 0x73d323ab, 0x7ade28a5, 0x61c935b7, 0x68c43eb9, 0x57e70f93, 0x5eea049d, 0x45fd198f, 0x4cf01281, 0xab6bcb3b, 0xa266c035, 0xb971dd27, 0xb07cd629, 0x8f5fe703, 0x8652ec0d, 0x9d45f11f, 0x9448fa11, 0xe303934b, 0xea0e9845, 0xf1198557, 0xf8148e59, 0xc737bf73, 0xce3ab47d, 0xd52da96f, 0xdc20a261, 0x766df6ad, 0x7f60fda3, 0x6477e0b1, 0x6d7aebbf, 0x5259da95, 0x5b54d19b, 0x4043cc89, 0x494ec787, 0x3e05aedd, 0x3708a5d3, 0x2c1fb8c1, 0x2512b3cf, 0x1a3182e5, 0x133c89eb, 0x082b94f9, 0x01269ff7, 0xe6bd464d, 0xefb04d43, 0xf4a75051, 0xfdaa5b5f, 0xc2896a75, 0xcb84617b, 0xd0937c69, 0xd99e7767, 0xaed51e3d, 0xa7d81533, 0xbccf0821, 0xb5c2032f, 0x8ae13205, 0x83ec390b, 0x98fb2419, 0x91f62f17, 0x4dd68d76, 0x44db8678, 0x5fcc9b6a, 0x56c19064, 0x69e2a14e, 0x60efaa40, 0x7bf8b752, 0x72f5bc5c, 0x05bed506, 0x0cb3de08, 0x17a4c31a, 0x1ea9c814, 0x218af93e, 0x2887f230, 0x3390ef22, 0x3a9de42c, 0xdd063d96, 0xd40b3698, 0xcf1c2b8a, 0xc6112084, 0xf93211ae, 0xf03f1aa0, 0xeb2807b2, 0xe2250cbc, 0x956e65e6, 0x9c636ee8, 0x877473fa, 0x8e7978f4, 0xb15a49de, 0xb85742d0, 0xa3405fc2, 0xaa4d54cc, 0xecdaf741, 0xe5d7fc4f, 0xfec0e15d, 0xf7cdea53, 0xc8eedb79, 0xc1e3d077, 0xdaf4cd65, 0xd3f9c66b, 0xa4b2af31, 0xadbfa43f, 0xb6a8b92d, 0xbfa5b223, 0x80868309, 0x898b8807, 0x929c9515, 0x9b919e1b, 0x7c0a47a1, 0x75074caf, 0x6e1051bd, 0x671d5ab3, 0x583e6b99, 0x51336097, 0x4a247d85, 0x4329768b, 0x34621fd1, 0x3d6f14df, 0x267809cd, 0x2f7502c3, 0x105633e9, 0x195b38e7, 0x024c25f5, 0x0b412efb, 0xd7618c9a, 0xde6c8794, 0xc57b9a86, 0xcc769188, 0xf355a0a2, 0xfa58abac, 0xe14fb6be, 0xe842bdb0, 0x9f09d4ea, 0x9604dfe4, 0x8d13c2f6, 0x841ec9f8, 0xbb3df8d2, 0xb230f3dc, 0xa927eece, 0xa02ae5c0, 0x47b13c7a, 0x4ebc3774, 0x55ab2a66, 0x5ca62168, 0x63851042, 0x6a881b4c, 0x719f065e, 0x78920d50, 0x0fd9640a, 0x06d46f04, 0x1dc37216, 0x14ce7918, 0x2bed4832, 0x22e0433c, 0x39f75e2e, 0x30fa5520, 0x9ab701ec, 0x93ba0ae2, 0x88ad17f0, 0x81a01cfe, 0xbe832dd4, 0xb78e26da, 0xac993bc8, 0xa59430c6, 0xd2df599c, 0xdbd25292, 0xc0c54f80, 0xc9c8448e, 0xf6eb75a4, 0xffe67eaa, 0xe4f163b8, 0xedfc68b6, 0x0a67b10c, 0x036aba02, 0x187da710, 0x1170ac1e, 0x2e539d34, 0x275e963a, 0x3c498b28, 0x35448026, 0x420fe97c, 0x4b02e272, 0x5015ff60, 0x5918f46e, 0x663bc544, 0x6f36ce4a, 0x7421d358, 0x7d2cd856, 0xa10c7a37, 0xa8017139, 0xb3166c2b, 0xba1b6725, 0x8538560f, 0x8c355d01, 0x97224013, 0x9e2f4b1d, 0xe9642247, 0xe0692949, 0xfb7e345b, 0xf2733f55, 0xcd500e7f, 0xc45d0571, 0xdf4a1863, 0xd647136d, 0x31dccad7, 0x38d1c1d9, 0x23c6dccb, 0x2acbd7c5, 0x15e8e6ef, 0x1ce5ede1, 0x07f2f0f3, 0x0efffbfd, 0x79b492a7, 0x70b999a9, 0x6bae84bb, 0x62a38fb5, 0x5d80be9f, 0x548db591, 0x4f9aa883, 0x4697a38d];
-
-	    function convertToInt32(bytes) {
-	        var result = [];
-	        for (var i = 0; i < bytes.length; i += 4) {
-	            result.push(
-	                (bytes[i    ] << 24) |
-	                (bytes[i + 1] << 16) |
-	                (bytes[i + 2] <<  8) |
-	                 bytes[i + 3]
-	            );
-	        }
-	        return result;
-	    }
-
-	    var AES = function(key) {
-	        if (!(this instanceof AES)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
-
-	        Object.defineProperty(this, 'key', {
-	            value: coerceArray(key, true)
-	        });
-
-	        this._prepare();
-	    };
-
-
-	    AES.prototype._prepare = function() {
-
-	        var rounds = numberOfRounds[this.key.length];
-	        if (rounds == null) {
-	            throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
-	        }
-
-	        // encryption round keys
-	        this._Ke = [];
-
-	        // decryption round keys
-	        this._Kd = [];
-
-	        for (var i = 0; i <= rounds; i++) {
-	            this._Ke.push([0, 0, 0, 0]);
-	            this._Kd.push([0, 0, 0, 0]);
-	        }
-
-	        var roundKeyCount = (rounds + 1) * 4;
-	        var KC = this.key.length / 4;
-
-	        // convert the key into ints
-	        var tk = convertToInt32(this.key);
-
-	        // copy values into round key arrays
-	        var index;
-	        for (var i = 0; i < KC; i++) {
-	            index = i >> 2;
-	            this._Ke[index][i % 4] = tk[i];
-	            this._Kd[rounds - index][i % 4] = tk[i];
-	        }
-
-	        // key expansion (fips-197 section 5.2)
-	        var rconpointer = 0;
-	        var t = KC, tt;
-	        while (t < roundKeyCount) {
-	            tt = tk[KC - 1];
-	            tk[0] ^= ((S[(tt >> 16) & 0xFF] << 24) ^
-	                      (S[(tt >>  8) & 0xFF] << 16) ^
-	                      (S[ tt        & 0xFF] <<  8) ^
-	                       S[(tt >> 24) & 0xFF]        ^
-	                      (rcon[rconpointer] << 24));
-	            rconpointer += 1;
-
-	            // key expansion (for non-256 bit)
-	            if (KC != 8) {
-	                for (var i = 1; i < KC; i++) {
-	                    tk[i] ^= tk[i - 1];
-	                }
-
-	            // key expansion for 256-bit keys is "slightly different" (fips-197)
-	            } else {
-	                for (var i = 1; i < (KC / 2); i++) {
-	                    tk[i] ^= tk[i - 1];
-	                }
-	                tt = tk[(KC / 2) - 1];
-
-	                tk[KC / 2] ^= (S[ tt        & 0xFF]        ^
-	                              (S[(tt >>  8) & 0xFF] <<  8) ^
-	                              (S[(tt >> 16) & 0xFF] << 16) ^
-	                              (S[(tt >> 24) & 0xFF] << 24));
-
-	                for (var i = (KC / 2) + 1; i < KC; i++) {
-	                    tk[i] ^= tk[i - 1];
-	                }
-	            }
-
-	            // copy values into round key arrays
-	            var i = 0, r, c;
-	            while (i < KC && t < roundKeyCount) {
-	                r = t >> 2;
-	                c = t % 4;
-	                this._Ke[r][c] = tk[i];
-	                this._Kd[rounds - r][c] = tk[i++];
-	                t++;
-	            }
-	        }
-
-	        // inverse-cipher-ify the decryption round key (fips-197 section 5.3)
-	        for (var r = 1; r < rounds; r++) {
-	            for (var c = 0; c < 4; c++) {
-	                tt = this._Kd[r][c];
-	                this._Kd[r][c] = (U1[(tt >> 24) & 0xFF] ^
-	                                  U2[(tt >> 16) & 0xFF] ^
-	                                  U3[(tt >>  8) & 0xFF] ^
-	                                  U4[ tt        & 0xFF]);
-	            }
-	        }
-	    };
-
-	    AES.prototype.encrypt = function(plaintext) {
-	        if (plaintext.length != 16) {
-	            throw new Error('invalid plaintext size (must be 16 bytes)');
-	        }
-
-	        var rounds = this._Ke.length - 1;
-	        var a = [0, 0, 0, 0];
-
-	        // convert plaintext to (ints ^ key)
-	        var t = convertToInt32(plaintext);
-	        for (var i = 0; i < 4; i++) {
-	            t[i] ^= this._Ke[0][i];
-	        }
-
-	        // apply round transforms
-	        for (var r = 1; r < rounds; r++) {
-	            for (var i = 0; i < 4; i++) {
-	                a[i] = (T1[(t[ i         ] >> 24) & 0xff] ^
-	                        T2[(t[(i + 1) % 4] >> 16) & 0xff] ^
-	                        T3[(t[(i + 2) % 4] >>  8) & 0xff] ^
-	                        T4[ t[(i + 3) % 4]        & 0xff] ^
-	                        this._Ke[r][i]);
-	            }
-	            t = a.slice();
-	        }
-
-	        // the last round is special
-	        var result = createArray(16), tt;
-	        for (var i = 0; i < 4; i++) {
-	            tt = this._Ke[rounds][i];
-	            result[4 * i    ] = (S[(t[ i         ] >> 24) & 0xff] ^ (tt >> 24)) & 0xff;
-	            result[4 * i + 1] = (S[(t[(i + 1) % 4] >> 16) & 0xff] ^ (tt >> 16)) & 0xff;
-	            result[4 * i + 2] = (S[(t[(i + 2) % 4] >>  8) & 0xff] ^ (tt >>  8)) & 0xff;
-	            result[4 * i + 3] = (S[ t[(i + 3) % 4]        & 0xff] ^  tt       ) & 0xff;
-	        }
-
-	        return result;
-	    };
-
-	    AES.prototype.decrypt = function(ciphertext) {
-	        if (ciphertext.length != 16) {
-	            throw new Error('invalid ciphertext size (must be 16 bytes)');
-	        }
-
-	        var rounds = this._Kd.length - 1;
-	        var a = [0, 0, 0, 0];
-
-	        // convert plaintext to (ints ^ key)
-	        var t = convertToInt32(ciphertext);
-	        for (var i = 0; i < 4; i++) {
-	            t[i] ^= this._Kd[0][i];
-	        }
-
-	        // apply round transforms
-	        for (var r = 1; r < rounds; r++) {
-	            for (var i = 0; i < 4; i++) {
-	                a[i] = (T5[(t[ i          ] >> 24) & 0xff] ^
-	                        T6[(t[(i + 3) % 4] >> 16) & 0xff] ^
-	                        T7[(t[(i + 2) % 4] >>  8) & 0xff] ^
-	                        T8[ t[(i + 1) % 4]        & 0xff] ^
-	                        this._Kd[r][i]);
-	            }
-	            t = a.slice();
-	        }
-
-	        // the last round is special
-	        var result = createArray(16), tt;
-	        for (var i = 0; i < 4; i++) {
-	            tt = this._Kd[rounds][i];
-	            result[4 * i    ] = (Si[(t[ i         ] >> 24) & 0xff] ^ (tt >> 24)) & 0xff;
-	            result[4 * i + 1] = (Si[(t[(i + 3) % 4] >> 16) & 0xff] ^ (tt >> 16)) & 0xff;
-	            result[4 * i + 2] = (Si[(t[(i + 2) % 4] >>  8) & 0xff] ^ (tt >>  8)) & 0xff;
-	            result[4 * i + 3] = (Si[ t[(i + 1) % 4]        & 0xff] ^  tt       ) & 0xff;
-	        }
-
-	        return result;
-	    };
-
-
-	    /**
-	     *  Mode Of Operation - Electonic Codebook (ECB)
-	     */
-	    var ModeOfOperationECB = function(key) {
-	        if (!(this instanceof ModeOfOperationECB)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
-
-	        this.description = "Electronic Code Block";
-	        this.name = "ecb";
-
-	        this._aes = new AES(key);
-	    };
-
-	    ModeOfOperationECB.prototype.encrypt = function(plaintext) {
-	        plaintext = coerceArray(plaintext);
-
-	        if ((plaintext.length % 16) !== 0) {
-	            throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
-	        }
-
-	        var ciphertext = createArray(plaintext.length);
-	        var block = createArray(16);
-
-	        for (var i = 0; i < plaintext.length; i += 16) {
-	            copyArray(plaintext, block, 0, i, i + 16);
-	            block = this._aes.encrypt(block);
-	            copyArray(block, ciphertext, i);
-	        }
-
-	        return ciphertext;
-	    };
-
-	    ModeOfOperationECB.prototype.decrypt = function(ciphertext) {
-	        ciphertext = coerceArray(ciphertext);
-
-	        if ((ciphertext.length % 16) !== 0) {
-	            throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
-	        }
-
-	        var plaintext = createArray(ciphertext.length);
-	        var block = createArray(16);
-
-	        for (var i = 0; i < ciphertext.length; i += 16) {
-	            copyArray(ciphertext, block, 0, i, i + 16);
-	            block = this._aes.decrypt(block);
-	            copyArray(block, plaintext, i);
-	        }
-
-	        return plaintext;
-	    };
-
-
-	    /**
-	     *  Mode Of Operation - Cipher Block Chaining (CBC)
-	     */
-	    var ModeOfOperationCBC = function(key, iv) {
-	        if (!(this instanceof ModeOfOperationCBC)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
-
-	        this.description = "Cipher Block Chaining";
-	        this.name = "cbc";
-
-	        if (!iv) {
-	            iv = createArray(16);
-
-	        } else if (iv.length != 16) {
-	            throw new Error('invalid initialation vector size (must be 16 bytes)');
-	        }
-
-	        this._lastCipherblock = coerceArray(iv, true);
-
-	        this._aes = new AES(key);
-	    };
-
-	    ModeOfOperationCBC.prototype.encrypt = function(plaintext) {
-	        plaintext = coerceArray(plaintext);
-
-	        if ((plaintext.length % 16) !== 0) {
-	            throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
-	        }
-
-	        var ciphertext = createArray(plaintext.length);
-	        var block = createArray(16);
-
-	        for (var i = 0; i < plaintext.length; i += 16) {
-	            copyArray(plaintext, block, 0, i, i + 16);
-
-	            for (var j = 0; j < 16; j++) {
-	                block[j] ^= this._lastCipherblock[j];
-	            }
-
-	            this._lastCipherblock = this._aes.encrypt(block);
-	            copyArray(this._lastCipherblock, ciphertext, i);
-	        }
-
-	        return ciphertext;
-	    };
-
-	    ModeOfOperationCBC.prototype.decrypt = function(ciphertext) {
-	        ciphertext = coerceArray(ciphertext);
-
-	        if ((ciphertext.length % 16) !== 0) {
-	            throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
-	        }
-
-	        var plaintext = createArray(ciphertext.length);
-	        var block = createArray(16);
-
-	        for (var i = 0; i < ciphertext.length; i += 16) {
-	            copyArray(ciphertext, block, 0, i, i + 16);
-	            block = this._aes.decrypt(block);
-
-	            for (var j = 0; j < 16; j++) {
-	                plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
-	            }
-
-	            copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
-	        }
-
-	        return plaintext;
-	    };
-
-
-	    /**
-	     *  Mode Of Operation - Cipher Feedback (CFB)
-	     */
-	    var ModeOfOperationCFB = function(key, iv, segmentSize) {
-	        if (!(this instanceof ModeOfOperationCFB)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
-
-	        this.description = "Cipher Feedback";
-	        this.name = "cfb";
-
-	        if (!iv) {
-	            iv = createArray(16);
-
-	        } else if (iv.length != 16) {
-	            throw new Error('invalid initialation vector size (must be 16 size)');
-	        }
-
-	        if (!segmentSize) { segmentSize = 1; }
-
-	        this.segmentSize = segmentSize;
-
-	        this._shiftRegister = coerceArray(iv, true);
-
-	        this._aes = new AES(key);
-	    };
-
-	    ModeOfOperationCFB.prototype.encrypt = function(plaintext) {
-	        if ((plaintext.length % this.segmentSize) != 0) {
-	            throw new Error('invalid plaintext size (must be segmentSize bytes)');
-	        }
-
-	        var encrypted = coerceArray(plaintext, true);
-
-	        var xorSegment;
-	        for (var i = 0; i < encrypted.length; i += this.segmentSize) {
-	            xorSegment = this._aes.encrypt(this._shiftRegister);
-	            for (var j = 0; j < this.segmentSize; j++) {
-	                encrypted[i + j] ^= xorSegment[j];
-	            }
-
-	            // Shift the register
-	            copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
-	            copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
-	        }
-
-	        return encrypted;
-	    };
-
-	    ModeOfOperationCFB.prototype.decrypt = function(ciphertext) {
-	        if ((ciphertext.length % this.segmentSize) != 0) {
-	            throw new Error('invalid ciphertext size (must be segmentSize bytes)');
-	        }
-
-	        var plaintext = coerceArray(ciphertext, true);
-
-	        var xorSegment;
-	        for (var i = 0; i < plaintext.length; i += this.segmentSize) {
-	            xorSegment = this._aes.encrypt(this._shiftRegister);
-
-	            for (var j = 0; j < this.segmentSize; j++) {
-	                plaintext[i + j] ^= xorSegment[j];
-	            }
-
-	            // Shift the register
-	            copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
-	            copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
-	        }
-
-	        return plaintext;
-	    };
-
-	    /**
-	     *  Mode Of Operation - Output Feedback (OFB)
-	     */
-	    var ModeOfOperationOFB = function(key, iv) {
-	        if (!(this instanceof ModeOfOperationOFB)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
-
-	        this.description = "Output Feedback";
-	        this.name = "ofb";
-
-	        if (!iv) {
-	            iv = createArray(16);
-
-	        } else if (iv.length != 16) {
-	            throw new Error('invalid initialation vector size (must be 16 bytes)');
-	        }
-
-	        this._lastPrecipher = coerceArray(iv, true);
-	        this._lastPrecipherIndex = 16;
-
-	        this._aes = new AES(key);
-	    };
-
-	    ModeOfOperationOFB.prototype.encrypt = function(plaintext) {
-	        var encrypted = coerceArray(plaintext, true);
-
-	        for (var i = 0; i < encrypted.length; i++) {
-	            if (this._lastPrecipherIndex === 16) {
-	                this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
-	                this._lastPrecipherIndex = 0;
-	            }
-	            encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
-	        }
-
-	        return encrypted;
-	    };
-
-	    // Decryption is symetric
-	    ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
-
-
-	    /**
-	     *  Counter object for CTR common mode of operation
-	     */
-	    var Counter = function(initialValue) {
-	        if (!(this instanceof Counter)) {
-	            throw Error('Counter must be instanitated with `new`');
-	        }
-
-	        // We allow 0, but anything false-ish uses the default 1
-	        if (initialValue !== 0 && !initialValue) { initialValue = 1; }
-
-	        if (typeof(initialValue) === 'number') {
-	            this._counter = createArray(16);
-	            this.setValue(initialValue);
-
-	        } else {
-	            this.setBytes(initialValue);
-	        }
-	    };
-
-	    Counter.prototype.setValue = function(value) {
-	        if (typeof(value) !== 'number' || parseInt(value) != value) {
-	            throw new Error('invalid counter value (must be an integer)');
-	        }
-
-	        // We cannot safely handle numbers beyond the safe range for integers
-	        if (value > Number.MAX_SAFE_INTEGER) {
-	            throw new Error('integer value out of safe range');
-	        }
-
-	        for (var index = 15; index >= 0; --index) {
-	            this._counter[index] = value % 256;
-	            value = parseInt(value / 256);
-	        }
-	    };
-
-	    Counter.prototype.setBytes = function(bytes) {
-	        bytes = coerceArray(bytes, true);
-
-	        if (bytes.length != 16) {
-	            throw new Error('invalid counter bytes size (must be 16 bytes)');
-	        }
-
-	        this._counter = bytes;
-	    };
-
-	    Counter.prototype.increment = function() {
-	        for (var i = 15; i >= 0; i--) {
-	            if (this._counter[i] === 255) {
-	                this._counter[i] = 0;
-	            } else {
-	                this._counter[i]++;
-	                break;
-	            }
-	        }
-	    };
-
-
-	    /**
-	     *  Mode Of Operation - Counter (CTR)
-	     */
-	    var ModeOfOperationCTR = function(key, counter) {
-	        if (!(this instanceof ModeOfOperationCTR)) {
-	            throw Error('AES must be instanitated with `new`');
-	        }
-
-	        this.description = "Counter";
-	        this.name = "ctr";
-
-	        if (!(counter instanceof Counter)) {
-	            counter = new Counter(counter);
-	        }
-
-	        this._counter = counter;
-
-	        this._remainingCounter = null;
-	        this._remainingCounterIndex = 16;
-
-	        this._aes = new AES(key);
-	    };
-
-	    ModeOfOperationCTR.prototype.encrypt = function(plaintext) {
-	        var encrypted = coerceArray(plaintext, true);
-
-	        for (var i = 0; i < encrypted.length; i++) {
-	            if (this._remainingCounterIndex === 16) {
-	                this._remainingCounter = this._aes.encrypt(this._counter._counter);
-	                this._remainingCounterIndex = 0;
-	                this._counter.increment();
-	            }
-	            encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
-	        }
-
-	        return encrypted;
-	    };
-
-	    // Decryption is symetric
-	    ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt;
-
-
-	    ///////////////////////
-	    // Padding
-
-	    // See:https://tools.ietf.org/html/rfc2315
-	    function pkcs7pad(data) {
-	        data = coerceArray(data, true);
-	        var padder = 16 - (data.length % 16);
-	        var result = createArray(data.length + padder);
-	        copyArray(data, result);
-	        for (var i = data.length; i < result.length; i++) {
-	            result[i] = padder;
-	        }
-	        return result;
-	    }
-
-	    function pkcs7strip(data) {
-	        data = coerceArray(data, true);
-	        if (data.length < 16) { throw new Error('PKCS#7 invalid length'); }
-
-	        var padder = data[data.length - 1];
-	        if (padder > 16) { throw new Error('PKCS#7 padding byte out of range'); }
-
-	        var length = data.length - padder;
-	        for (var i = 0; i < padder; i++) {
-	            if (data[length + i] !== padder) {
-	                throw new Error('PKCS#7 invalid padding byte');
-	            }
-	        }
-
-	        var result = createArray(length);
-	        copyArray(data, result, 0, 0, length);
-	        return result;
-	    }
-
-	    ///////////////////////
-	    // Exporting
-
-
-	    // The block cipher
-	    var aesjs = {
-	        AES: AES,
-	        Counter: Counter,
-
-	        ModeOfOperation: {
-	            ecb: ModeOfOperationECB,
-	            cbc: ModeOfOperationCBC,
-	            cfb: ModeOfOperationCFB,
-	            ofb: ModeOfOperationOFB,
-	            ctr: ModeOfOperationCTR
-	        },
-
-	        utils: {
-	            hex: convertHex,
-	            utf8: convertUtf8
-	        },
-
-	        padding: {
-	            pkcs7: {
-	                pad: pkcs7pad,
-	                strip: pkcs7strip
-	            }
-	        },
-
-	        _arrayTest: {
-	            coerceArray: coerceArray,
-	            createArray: createArray,
-	            copyArray: copyArray,
-	        }
-	    };
-
-
-	    // node.js
-	    {
-	        module.exports = aesjs;
-
-	    // RequireJS/AMD
-	    // http://www.requirejs.org/docs/api.html
-	    // https://github.com/amdjs/amdjs-api/wiki/AMD
-	    }
-
-
-	})();
-	});
-
-	// See https://github.com/ricmoo/aes-js
-	// We can use keys that are 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes).
-	// To generate a random key:  window.crypto.getRandomValues(new Uint8Array(16));
-
-	// This default signing key is built into iD and can be used to mask/unmask sensitive values.
-	var DEFAULT_128 = [250, 157, 60, 79, 142, 134, 229, 129, 138, 126, 210, 129, 29, 71, 160, 208];
-
-
-	function utilAesEncrypt(text, key) {
-	  key = key || DEFAULT_128;
-	  var textBytes = aesJs.utils.utf8.toBytes(text);
-	  var aesCtr = new aesJs.ModeOfOperation.ctr(key);
-	  var encryptedBytes = aesCtr.encrypt(textBytes);
-	  var encryptedHex = aesJs.utils.hex.fromBytes(encryptedBytes);
-	  return encryptedHex;
-	}
-
-
-	function utilAesDecrypt(encryptedHex, key) {
-	  key = key || DEFAULT_128;
-	  var encryptedBytes = aesJs.utils.hex.toBytes(encryptedHex);
-	  var aesCtr = new aesJs.ModeOfOperation.ctr(key);
-	  var decryptedBytes = aesCtr.decrypt(encryptedBytes);
-	  var text = aesJs.utils.utf8.fromBytes(decryptedBytes);
-	  return text;
-	}
-
-	function utilCleanTags(tags) {
-	    var out = {};
-	    for (var k in tags) {
-	        if (!k) { continue; }
-	        var v = tags[k];
-	        if (v !== undefined) {
-	            out[k] = cleanValue(k, v);
-	        }
-	    }
-
-	    return out;
-
-
-	    function cleanValue(k, v) {
-	        function keepSpaces(k) {
-	            return /_hours|_times|:conditional$/.test(k);
-	        }
-
-	        function skip(k) {
-	            return /^(description|note|fixme)$/.test(k);
-	        }
-
-	        if (skip(k)) { return v; }
-
-	        var cleaned = v
-	            .split(';')
-	            .map(function(s) { return s.trim(); })
-	            .join(keepSpaces(k) ? '; ' : ';');
-
-	        // The code below is not intended to validate websites and emails.
-	        // It is only intended to prevent obvious copy-paste errors. (#2323)
-	        // clean website- and email-like tags
-	        if (k.indexOf('website') !== -1 ||
-	            k.indexOf('email') !== -1 ||
-	            cleaned.indexOf('http') === 0) {
-	            cleaned = cleaned
-	                .replace(/[\u200B-\u200F\uFEFF]/g, '');  // strip LRM and other zero width chars
-
-	        }
-
-	        return cleaned;
-	    }
-	}
-
-	// Like selection.property('value', ...), but avoids no-op value sets,
-	// which can result in layout/repaint thrashing in some situations.
-	function utilGetSetValue(selection, value) {
-	    function d3_selection_value(value) {
-	        function valueNull() {
-	            delete this.value;
-	        }
-
-	        function valueConstant() {
-	            if (this.value !== value) {
-	                this.value = value;
-	            }
-	        }
-
-	        function valueFunction() {
-	            var x = value.apply(this, arguments);
-	            if (x == null) {
-	                delete this.value;
-	            } else if (this.value !== x) {
-	                this.value = x;
-	            }
-	        }
-
-	        return value == null
-	            ? valueNull : (typeof value === 'function'
-	            ? valueFunction : valueConstant);
-	    }
-
-	    if (arguments.length === 1) {
-	        return selection.property('value');
-	    }
-
-	    return selection.each(d3_selection_value(value));
-	}
-
-	function utilKeybinding(namespace) {
-	    var _keybindings = {};
-
-
-	    function testBindings(isCapturing) {
-	        var didMatch = false;
-	        var bindings = Object.keys(_keybindings).map(function(id) { return _keybindings[id]; });
-	        var i, binding;
-
-	        // Most key shortcuts will accept either lower or uppercase ('h' or 'H'),
-	        // so we don't strictly match on the shift key, but we prioritize
-	        // shifted keybindings first, and fallback to unshifted only if no match.
-	        // (This lets us differentiate between '←'/'⇧←' or '⌘Z'/'⌘⇧Z')
-
-	        // priority match shifted keybindings first
-	        for (i = 0; i < bindings.length; i++) {
-	            binding = bindings[i];
-	            if (!binding.event.modifiers.shiftKey) { continue; }  // no shift
-	            if (!!binding.capture !== isCapturing) { continue; }
-	            if (matches(binding, true)) {
-	                binding.callback();
-	                didMatch = true;
-	            }
-	        }
-
-	        // then unshifted keybindings
-	        if (didMatch) { return; }
-	        for (i = 0; i < bindings.length; i++) {
-	            binding = bindings[i];
-	            if (binding.event.modifiers.shiftKey) { continue; }   // shift
-	            if (!!binding.capture !== isCapturing) { continue; }
-	            if (matches(binding, false)) {
-	                binding.callback();
-	            }
-	        }
-
-
-	        function matches(binding, testShift) {
-	            var event$1 = event;
-	            var isMatch = false;
-	            var tryKeyCode = true;
-
-	            // Prefer a match on `KeyboardEvent.key`
-	            if (event$1.key !== undefined) {
-	                tryKeyCode = (event$1.key.charCodeAt(0) > 255);  // outside ISO-Latin-1
-	                isMatch = true;
-
-	                if (binding.event.key === undefined) {
-	                    isMatch = false;
-	                } else if (Array.isArray(binding.event.key)) {
-	                    if (binding.event.key.map(function(s) { return s.toLowerCase(); }).indexOf(event$1.key.toLowerCase()) === -1)
-	                        { isMatch = false; }
-	                } else {
-	                    if (event$1.key.toLowerCase() !== binding.event.key.toLowerCase())
-	                        { isMatch = false; }
-	                }
-	            }
-
-	            // Fallback match on `KeyboardEvent.keyCode`, can happen if:
-	            // - browser doesn't support `KeyboardEvent.key`
-	            // - `KeyboardEvent.key` is outside ISO-Latin-1 range (cyrillic?)
-	            if (!isMatch && tryKeyCode) {
-	                isMatch = (event$1.keyCode === binding.event.keyCode);
-	            }
-
-	            if (!isMatch) { return false; }
-
-	            // test modifier keys
-	            if (!(event$1.ctrlKey && event$1.altKey)) {  // if both are set, assume AltGr and skip it - #4096
-	                if (event$1.ctrlKey !== binding.event.modifiers.ctrlKey) { return false; }
-	                if (event$1.altKey !== binding.event.modifiers.altKey) { return false; }
-	            }
-	            if (event$1.metaKey !== binding.event.modifiers.metaKey) { return false; }
-	            if (testShift && event$1.shiftKey !== binding.event.modifiers.shiftKey) { return false; }
-
-	            return true;
-	        }
-	    }
-
-
-	    function capture() {
-	        testBindings(true);
-	    }
-
-
-	    function bubble() {
-	        var tagName = select(event.target).node().tagName;
-	        if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
-	            return;
-	        }
-	        testBindings(false);
-	    }
-
-
-	    function keybinding(selection) {
-	        selection = selection || select(document);
-	        selection.on('keydown.capture.' + namespace, capture, true);
-	        selection.on('keydown.bubble.' + namespace, bubble, false);
-	        return keybinding;
-	    }
-
-	    // was: keybinding.off()
-	    keybinding.unbind = function(selection) {
-	        _keybindings = [];
-	        selection = selection || select(document);
-	        selection.on('keydown.capture.' + namespace, null);
-	        selection.on('keydown.bubble.' + namespace, null);
-	        return keybinding;
-	    };
-
-
-	    keybinding.clear = function() {
-	        _keybindings = {};
-	        return keybinding;
-	    };
-
-
-	    // Remove one or more keycode bindings.
-	    keybinding.off = function(codes, capture) {
-	        var arr = utilArrayUniq([].concat(codes));
-
-	        for (var i = 0; i < arr.length; i++) {
-	            var id = arr[i] + (capture ? '-capture' : '-bubble');
-	            delete _keybindings[id];
-	        }
-	        return keybinding;
-	    };
-
-
-	    // Add one or more keycode bindings.
-	    keybinding.on = function(codes, callback, capture) {
-	        if (typeof callback !== 'function') {
-	            return keybinding.off(codes, capture);
-	        }
-
-	        var arr = utilArrayUniq([].concat(codes));
-
-	        for (var i = 0; i < arr.length; i++) {
-	            var id = arr[i] + (capture ? '-capture' : '-bubble');
-	            var binding = {
-	                id: id,
-	                capture: capture,
-	                callback: callback,
-	                event: {
-	                    key: undefined,  // preferred
-	                    keyCode: 0,      // fallback
-	                    modifiers: {
-	                        shiftKey: false,
-	                        ctrlKey: false,
-	                        altKey: false,
-	                        metaKey: false
-	                    }
-	                }
-	            };
-
-	            if (_keybindings[id]) {
-	                console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
-	            }
-
-	            _keybindings[id] = binding;
-
-	            var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);
-	            for (var j = 0; j < matches.length; j++) {
-	                // Normalise matching errors
-	                if (matches[j] === '++') { matches[j] = '+'; }
-
-	                if (matches[j] in utilKeybinding.modifierCodes) {
-	                    var prop = utilKeybinding.modifierProperties[utilKeybinding.modifierCodes[matches[j]]];
-	                    binding.event.modifiers[prop] = true;
-	                } else {
-	                    binding.event.key = utilKeybinding.keys[matches[j]] || matches[j];
-	                    if (matches[j] in utilKeybinding.keyCodes) {
-	                        binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
-	                    }
-	                }
-	            }
-	        }
-
-	        return keybinding;
-	    };
-
-
-	    return keybinding;
-	}
-
-
-	/*
-	 * See https://github.com/keithamus/jwerty
-	 */
-
-	utilKeybinding.modifierCodes = {
-	    // Shift key, ⇧
-	    '⇧': 16, shift: 16,
-	    // CTRL key, on Mac: ⌃
-	    '⌃': 17, ctrl: 17,
-	    // ALT key, on Mac: ⌥ (Alt)
-	    '⌥': 18, alt: 18, option: 18,
-	    // META, on Mac: ⌘ (CMD), on Windows (Win), on Linux (Super)
-	    '⌘': 91, meta: 91, cmd: 91, 'super': 91, win: 91
-	};
-
-	utilKeybinding.modifierProperties = {
-	    16: 'shiftKey',
-	    17: 'ctrlKey',
-	    18: 'altKey',
-	    91: 'metaKey'
-	};
-
-	utilKeybinding.keys = {
-	    // Backspace key, on Mac: ⌫ (Backspace)
-	    '⌫': 'Backspace', backspace: 'Backspace',
-	    // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
-	    '⇥': 'Tab', '⇆': 'Tab', tab: 'Tab',
-	    // Return key, ↩
-	    '↩': 'Enter', 'return': 'Enter', enter: 'Enter', '⌅': 'Enter',
-	    // Pause/Break key
-	    'pause': 'Pause', 'pause-break': 'Pause',
-	    // Caps Lock key, ⇪
-	    '⇪': 'CapsLock', caps: 'CapsLock', 'caps-lock': 'CapsLock',
-	    // Escape key, on Mac: ⎋, on Windows: Esc
-	    '⎋': ['Escape', 'Esc'], escape: ['Escape', 'Esc'], esc: ['Escape', 'Esc'],
-	    // Space key
-	    space: [' ', 'Spacebar'],
-	    // Page-Up key, or pgup, on Mac: ↖
-	    '↖': 'PageUp', pgup: 'PageUp', 'page-up': 'PageUp',
-	    // Page-Down key, or pgdown, on Mac: ↘
-	    '↘': 'PageDown', pgdown: 'PageDown', 'page-down': 'PageDown',
-	    // END key, on Mac: ⇟
-	    '⇟': 'End', end: 'End',
-	    // HOME key, on Mac: ⇞
-	    '⇞': 'Home', home: 'Home',
-	    // Insert key, or ins
-	    ins: 'Insert', insert: 'Insert',
-	    // Delete key, on Mac: ⌦ (Delete)
-	    '⌦': ['Delete', 'Del'], del: ['Delete', 'Del'], 'delete': ['Delete', 'Del'],
-	    // Left Arrow Key, or ←
-	    '←': ['ArrowLeft', 'Left'], left: ['ArrowLeft', 'Left'], 'arrow-left': ['ArrowLeft', 'Left'],
-	    // Up Arrow Key, or ↑
-	    '↑': ['ArrowUp', 'Up'], up: ['ArrowUp', 'Up'], 'arrow-up': ['ArrowUp', 'Up'],
-	    // Right Arrow Key, or →
-	    '→': ['ArrowRight', 'Right'], right: ['ArrowRight', 'Right'], 'arrow-right': ['ArrowRight', 'Right'],
-	    // Up Arrow Key, or ↓
-	    '↓': ['ArrowDown', 'Down'], down: ['ArrowDown', 'Down'], 'arrow-down': ['ArrowDown', 'Down'],
-	    // odities, stuff for backward compatibility (browsers and code):
-	    // Num-Multiply, or *
-	    '*': ['*', 'Multiply'], star: ['*', 'Multiply'], asterisk: ['*', 'Multiply'], multiply: ['*', 'Multiply'],
-	    // Num-Plus or +
-	    '+': ['+', 'Add'], 'plus': ['+', 'Add'],
-	    // Num-Subtract, or -
-	    '-': ['-', 'Subtract'], subtract: ['-', 'Subtract'], 'dash': ['-', 'Subtract'],
-	    // Semicolon
-	    semicolon: ';',
-	    // = or equals
-	    equals: '=',
-	    // Comma, or ,
-	    comma: ',',
-	    // Period, or ., or full-stop
-	    period: '.', 'full-stop': '.',
-	    // Slash, or /, or forward-slash
-	    slash: '/', 'forward-slash': '/',
-	    // Tick, or `, or back-quote
-	    tick: '`', 'back-quote': '`',
-	    // Open bracket, or [
-	    'open-bracket': '[',
-	    // Back slash, or \
-	    'back-slash': '\\',
-	    // Close backet, or ]
-	    'close-bracket': ']',
-	    // Apostrophe, or Quote, or '
-	    quote: '\'', apostrophe: '\'',
-	    // NUMPAD 0-9
-	    'num-0': '0',
-	    'num-1': '1',
-	    'num-2': '2',
-	    'num-3': '3',
-	    'num-4': '4',
-	    'num-5': '5',
-	    'num-6': '6',
-	    'num-7': '7',
-	    'num-8': '8',
-	    'num-9': '9',
-	    // F1-F25
-	    f1: 'F1',
-	    f2: 'F2',
-	    f3: 'F3',
-	    f4: 'F4',
-	    f5: 'F5',
-	    f6: 'F6',
-	    f7: 'F7',
-	    f8: 'F8',
-	    f9: 'F9',
-	    f10: 'F10',
-	    f11: 'F11',
-	    f12: 'F12',
-	    f13: 'F13',
-	    f14: 'F14',
-	    f15: 'F15',
-	    f16: 'F16',
-	    f17: 'F17',
-	    f18: 'F18',
-	    f19: 'F19',
-	    f20: 'F20',
-	    f21: 'F21',
-	    f22: 'F22',
-	    f23: 'F23',
-	    f24: 'F24',
-	    f25: 'F25'
-	};
-
-	utilKeybinding.keyCodes = {
-	    // Backspace key, on Mac: ⌫ (Backspace)
-	    '⌫': 8, backspace: 8,
-	    // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
-	    '⇥': 9, '⇆': 9, tab: 9,
-	    // Return key, ↩
-	    '↩': 13, 'return': 13, enter: 13, '⌅': 13,
-	    // Pause/Break key
-	    'pause': 19, 'pause-break': 19,
-	    // Caps Lock key, ⇪
-	    '⇪': 20, caps: 20, 'caps-lock': 20,
-	    // Escape key, on Mac: ⎋, on Windows: Esc
-	    '⎋': 27, escape: 27, esc: 27,
-	    // Space key
-	    space: 32,
-	    // Page-Up key, or pgup, on Mac: ↖
-	    '↖': 33, pgup: 33, 'page-up': 33,
-	    // Page-Down key, or pgdown, on Mac: ↘
-	    '↘': 34, pgdown: 34, 'page-down': 34,
-	    // END key, on Mac: ⇟
-	    '⇟': 35, end: 35,
-	    // HOME key, on Mac: ⇞
-	    '⇞': 36, home: 36,
-	    // Insert key, or ins
-	    ins: 45, insert: 45,
-	    // Delete key, on Mac: ⌦ (Delete)
-	    '⌦': 46, del: 46, 'delete': 46,
-	    // Left Arrow Key, or ←
-	    '←': 37, left: 37, 'arrow-left': 37,
-	    // Up Arrow Key, or ↑
-	    '↑': 38, up: 38, 'arrow-up': 38,
-	    // Right Arrow Key, or →
-	    '→': 39, right: 39, 'arrow-right': 39,
-	    // Up Arrow Key, or ↓
-	    '↓': 40, down: 40, 'arrow-down': 40,
-	    // odities, printing characters that come out wrong:
-	    // Firefox Equals
-	    'ffequals': 61,
-	    // Num-Multiply, or *
-	    '*': 106, star: 106, asterisk: 106, multiply: 106,
-	    // Num-Plus or +
-	    '+': 107, 'plus': 107,
-	    // Num-Subtract, or -
-	    '-': 109, subtract: 109,
-	    // Firefox Plus
-	    'ffplus': 171,
-	    // Firefox Minus
-	    'ffminus': 173,
-	    // Semicolon
-	    ';': 186, semicolon: 186,
-	    // = or equals
-	    '=': 187, 'equals': 187,
-	    // Comma, or ,
-	    ',': 188, comma: 188,
-	    // Dash / Underscore key
-	    'dash': 189,
-	    // Period, or ., or full-stop
-	    '.': 190, period: 190, 'full-stop': 190,
-	    // Slash, or /, or forward-slash
-	    '/': 191, slash: 191, 'forward-slash': 191,
-	    // Tick, or `, or back-quote
-	    '`': 192, tick: 192, 'back-quote': 192,
-	    // Open bracket, or [
-	    '[': 219, 'open-bracket': 219,
-	    // Back slash, or \
-	    '\\': 220, 'back-slash': 220,
-	    // Close backet, or ]
-	    ']': 221, 'close-bracket': 221,
-	    // Apostrophe, or Quote, or '
-	    '\'': 222, quote: 222, apostrophe: 222
-	};
-
-	// NUMPAD 0-9
-	var i$2 = 95, n = 0;
-	while (++i$2 < 106) {
-	    utilKeybinding.keyCodes['num-' + n] = i$2;
-	    ++n;
-	}
-
-	// 0-9
-	i$2 = 47; n = 0;
-	while (++i$2 < 58) {
-	    utilKeybinding.keyCodes[n] = i$2;
-	    ++n;
-	}
-
-	// F1-F25
-	i$2 = 111; n = 1;
-	while (++i$2 < 136) {
-	    utilKeybinding.keyCodes['f' + n] = i$2;
-	    ++n;
-	}
-
-	// a-z
-	i$2 = 64;
-	while (++i$2 < 91) {
-	    utilKeybinding.keyCodes[String.fromCharCode(i$2).toLowerCase()] = i$2;
-	}
-
-	function utilObjectOmit(obj, omitKeys) {
-	    return Object.keys(obj).reduce(function(result, key) {
-	        if (omitKeys.indexOf(key) === -1) {
-	            result[key] = obj[key];  // keep
-	        }
-	        return result;
-	    }, {});
-	}
-
-	// Copies a variable number of methods from source to target.
-	function utilRebind(target, source) {
-	    var arguments$1 = arguments;
-
-	    var i = 1, n = arguments.length, method;
-	    while (++i < n) {
-	        target[method = arguments$1[i]] = d3_rebind(target, source, source[method]);
-	    }
-	    return target;
-	}
-
-	// Method is assumed to be a standard D3 getter-setter:
-	// If passed with no arguments, gets the value.
-	// If passed with arguments, sets the value and returns the target.
-	function d3_rebind(target, source, method) {
-	    return function() {
-	        var value = method.apply(source, arguments);
-	        return value === source ? target : value;
-	    };
-	}
-
-	// A per-domain session mutex backed by a cookie and dead man's
-	// switch. If the session crashes, the mutex will auto-release
-	// after 5 seconds.
-
-	// This accepts a string and returns an object that complies with utilSessionMutexType
-	function utilSessionMutex(name) {
-	    var mutex = {};
-	    var intervalID;
-
-	    function renew() {
-	        var expires = new Date();
-	        expires.setSeconds(expires.getSeconds() + 5);
-	        document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
-	    }
-
-	    mutex.lock = function () {
-	        if (intervalID) { return true; }
-	        var cookie = document.cookie.replace(new RegExp('(?:(?:^|.*;)\\s*' + name + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');
-	        if (cookie) { return false; }
-	        renew();
-	        intervalID = window.setInterval(renew, 4000);
-	        return true;
-	    };
-
-	    mutex.unlock = function () {
-	        if (!intervalID) { return; }
-	        document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
-	        clearInterval(intervalID);
-	        intervalID = null;
-	    };
-
-	    mutex.locked = function () {
-	        return !!intervalID;
-	    };
-
-	    return mutex;
-	}
-
-	function utilTiler() {
-	    var _size = [256, 256];
-	    var _scale = 256;
-	    var _tileSize = 256;
-	    var _zoomExtent = [0, 20];
-	    var _translate = [_size[0] / 2, _size[1] / 2];
-	    var _margin = 0;
-	    var _skipNullIsland = false;
-
-
-	    function clamp(num, min, max) {
-	        return Math.max(min, Math.min(num, max));
-	    }
-
-
-	    function nearNullIsland(tile) {
-	        var x = tile[0];
-	        var y = tile[1];
-	        var z = tile[2];
-	        if (z >= 7) {
-	            var center = Math.pow(2, z - 1);
-	            var width = Math.pow(2, z - 6);
-	            var min = center - (width / 2);
-	            var max = center + (width / 2) - 1;
-	            return x >= min && x <= max && y >= min && y <= max;
-	        }
-	        return false;
-	    }
-
-
-	    function tiler() {
-	        var z = geoScaleToZoom(_scale / (2 * Math.PI), _tileSize);
-	        var z0 = clamp(Math.round(z), _zoomExtent[0], _zoomExtent[1]);
-	        var tileMin = 0;
-	        var tileMax = Math.pow(2, z0) - 1;
-	        var log2ts = Math.log(_tileSize) * Math.LOG2E;
-	        var k = Math.pow(2, z - z0 + log2ts);
-	        var origin = [
-	            (_translate[0] - _scale / 2) / k,
-	            (_translate[1] - _scale / 2) / k
-	        ];
-
-	        var cols = range$1(
-	            clamp(Math.floor(-origin[0]) - _margin,               tileMin, tileMax + 1),
-	            clamp(Math.ceil(_size[0] / k - origin[0]) + _margin,  tileMin, tileMax + 1)
-	        );
-	        var rows = range$1(
-	            clamp(Math.floor(-origin[1]) - _margin,               tileMin, tileMax + 1),
-	            clamp(Math.ceil(_size[1] / k - origin[1]) + _margin,  tileMin, tileMax + 1)
-	        );
-
-	        var tiles = [];
-	        for (var i = 0; i < rows.length; i++) {
-	            var y = rows[i];
-	            for (var j = 0; j < cols.length; j++) {
-	                var x = cols[j];
-
-	                if (i >= _margin && i <= rows.length - _margin &&
-	                    j >= _margin && j <= cols.length - _margin) {
-	                    tiles.unshift([x, y, z0]);  // tiles in view at beginning
-	                } else {
-	                    tiles.push([x, y, z0]);     // tiles in margin at the end
-	                }
-	            }
-	        }
-
-	        tiles.translate = origin;
-	        tiles.scale = k;
-
-	        return tiles;
-	    }
-
-
-	    /**
-	     * getTiles() returns an array of tiles that cover the map view
-	     */
-	    tiler.getTiles = function(projection) {
-	        var origin = [
-	            projection.scale() * Math.PI - projection.translate()[0],
-	            projection.scale() * Math.PI - projection.translate()[1]
-	        ];
-
-	        this
-	            .size(projection.clipExtent()[1])
-	            .scale(projection.scale() * 2 * Math.PI)
-	            .translate(projection.translate());
-
-	        var tiles = tiler();
-	        var ts = tiles.scale;
-
-	        return tiles
-	            .map(function(tile) {
-	                if (_skipNullIsland && nearNullIsland(tile)) {
-	                    return false;
-	                }
-	                var x = tile[0] * ts - origin[0];
-	                var y = tile[1] * ts - origin[1];
-	                return {
-	                    id: tile.toString(),
-	                    xyz: tile,
-	                    extent: geoExtent(
-	                        projection.invert([x, y + ts]),
-	                        projection.invert([x + ts, y])
-	                    )
-	                };
-	            }).filter(Boolean);
-	    };
-
-
-	    /**
-	     * getGeoJSON() returns a FeatureCollection for debugging tiles
-	     */
-	    tiler.getGeoJSON = function(projection) {
-	        var features = tiler.getTiles(projection).map(function(tile) {
-	            return {
-	                type: 'Feature',
-	                properties: {
-	                    id: tile.id,
-	                    name: tile.id
-	                },
-	                geometry: {
-	                    type: 'Polygon',
-	                    coordinates: [ tile.extent.polygon() ]
-	                }
-	            };
-	        });
-
-	        return {
-	            type: 'FeatureCollection',
-	            features: features
-	        };
-	    };
-
-
-	    tiler.tileSize = function(val) {
-	        if (!arguments.length) { return _tileSize; }
-	        _tileSize = val;
-	        return tiler;
-	    };
-
-
-	    tiler.zoomExtent = function(val) {
-	        if (!arguments.length) { return _zoomExtent; }
-	        _zoomExtent = val;
-	        return tiler;
-	    };
-
-
-	    tiler.size = function(val) {
-	        if (!arguments.length) { return _size; }
-	        _size = val;
-	        return tiler;
-	    };
-
-
-	    tiler.scale = function(val) {
-	        if (!arguments.length) { return _scale; }
-	        _scale = val;
-	        return tiler;
-	    };
-
-
-	    tiler.translate = function(val) {
-	        if (!arguments.length) { return _translate; }
-	        _translate = val;
-	        return tiler;
-	    };
-
-
-	    // number to extend the rows/columns beyond those covering the viewport
-	    tiler.margin = function(val) {
-	        if (!arguments.length) { return _margin; }
-	        _margin = +val;
-	        return tiler;
-	    };
-
-
-	    tiler.skipNullIsland = function(val) {
-	        if (!arguments.length) { return _skipNullIsland; }
-	        _skipNullIsland = val;
-	        return tiler;
-	    };
-
-
-	    return tiler;
-	}
-
-	function utilTriggerEvent(target, type) {
-	    target.each(function() {
-	        var evt = document.createEvent('HTMLEvents');
-	        evt.initEvent(type, true, true);
-	        this.dispatchEvent(evt);
-	    });
-	}
-
-	var _mainLocalizer = coreLocalizer(); // singleton
-	var _t = _mainLocalizer.t;
-
-	//
-	// coreLocalizer manages language and locale parameters including translated strings
-	//
-	function coreLocalizer() {
-
-	    var localizer = {};
-
-	    var _dataLanguages = {};
-
-	    // `localeData` is an object containing all _supported_ locale codes -> language info.
-	    // {
-	    // en: { rtl: false, languageNames: {…}, scriptNames: {…} },
-	    // de: { rtl: false, languageNames: {…}, scriptNames: {…} },
-	    // …
-	    // }
-	    var _dataLocales = {};
-
-	    // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
-	    // {
-	    // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-	    // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-	    // …
-	    // }
-	    var _localeStrings = {};
-
-	    // the current locale parameters
-	    var _localeCode = 'en-US';
-	    var _languageCode = 'en';
-	    var _textDirection = 'ltr';
-	    var _usesMetric = false;
-	    var _languageNames = {};
-	    var _scriptNames = {};
-
-	    // getters for the current locale parameters
-	    localizer.localeCode = function () { return _localeCode; };
-	    localizer.languageCode = function () { return _languageCode; };
-	    localizer.textDirection = function () { return _textDirection; };
-	    localizer.usesMetric = function () { return _usesMetric; };
-	    localizer.languageNames = function () { return _languageNames; };
-	    localizer.scriptNames = function () { return _scriptNames; };
-
-
-	    // The client app may want to manually set the locale, regardless of the
-	    // settings provided by the browser
-	    var _preferredLocaleCodes = [];
-	    localizer.preferredLocaleCodes = function(codes) {
-	        if (!arguments.length) { return _preferredLocaleCodes; }
-	        if (typeof codes === 'string') {
-	            // be generous and accept delimited strings as input
-	            _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
-	        } else {
-	            _preferredLocaleCodes = codes;
-	        }
-	        return localizer;
-	    };
-
-
-	    var _loadPromise;
-
-	    localizer.ensureLoaded = function () {
-
-	        if (_loadPromise) { return _loadPromise; }
-
-	        return _loadPromise = Promise.all([
-	                // load the list of langauges
-	                _mainFileFetcher.get('languages'),
-	                // load the list of supported locales
-	                _mainFileFetcher.get('locales')
-	            ])
-	            .then(function (results) {
-	                _dataLanguages = results[0];
-	                _dataLocales = results[1];
-	            })
-	            .then(function () {
-	                var requestedLocales = (_preferredLocaleCodes || [])
-	                    // list of locales preferred by the browser in priority order
-	                    .concat(utilDetect().browserLocales);
-	                _localeCode = bestSupportedLocale(requestedLocales);
-
-	                return Promise.all([
-	                    // always load the English locale strings as fallbacks
-	                    localizer.loadLocale('en'),
-	                    // load the preferred locale
-	                    localizer.loadLocale(_localeCode)
-	                ]);
-	            })
-	            .then(function () {
-	                updateForCurrentLocale();
-	            })
-	            .catch(function (err) { return console.error(err); });  // eslint-disable-line
-	    };
-
-	    // Returns the best locale from `locales` supported by iD, if any
-	    function bestSupportedLocale(locales) {
-	        var supportedLocales = _dataLocales;
-
-	        var loop = function ( i ) {
-	            var locale = locales[i];
-	            if (locale.includes('-')) { // full locale ('es-ES')
-
-	                if (supportedLocales[locale]) { return { v: locale }; }
-
-	                // If full locale not supported ('es-FAKE'), fallback to the base ('es')
-	                var langPart = locale.split('-')[0];
-	                if (supportedLocales[langPart]) { return { v: langPart }; }
-
-	            } else { // base locale ('es')
-
-	                // prefer a lower-priority full locale with this base ('es' < 'es-ES')
-	                var fullLocale = locales.find(function (locale2, index) {
-	                    return index > i &&
-	                        locale2 !== locale &&
-	                        locale2.split('-')[0] === locale &&
-	                        supportedLocales[locale2];
-	                });
-	                if (fullLocale) { return { v: fullLocale }; }
-
-	                if (supportedLocales[locale]) { return { v: locale }; }
-	            }
-	        };
-
-	        for (var i in locales) {
-	            var returned = loop( i );
-
-	            if ( returned ) return returned.v;
-	        }
-
-	        return null;
-	    }
-
-	    function updateForCurrentLocale() {
-	        if (!_localeCode) { return; }
-
-	        _languageCode = _localeCode.split('-')[0];
-
-	        var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
-
-	        var hash = utilStringQs(window.location.hash);
-
-	        if (hash.rtl === 'true') {
-	            _textDirection = 'rtl';
-	        } else if (hash.rtl === 'false') {
-	            _textDirection = 'ltr';
-	        }  else {
-	            _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
-	        }
-
-	        _languageNames = currentData && currentData.languageNames;
-	        _scriptNames = currentData && currentData.scriptNames;
-
-	        _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
-	    }
-
-
-	    /* Locales */
-	    // Returns a Promise to load the strings for the requested locale
-	    localizer.loadLocale = function (requested) {
-
-	        if (!_dataLocales) {
-	            return Promise.reject('loadLocale called before init');
-	        }
-
-	        var locale = requested;
-
-	        // US English is the default
-	        if (locale.toLowerCase() === 'en-us') { locale = 'en'; }
-
-	        if (!_dataLocales[locale]) {
-	            return Promise.reject(("Unsupported locale: " + requested));
-	        }
-
-	        if (_localeStrings[locale]) {    // already loaded
-	            return Promise.resolve(locale);
-	        }
-
-	        var fileMap = _mainFileFetcher.fileMap();
-	        var key = "locale_" + locale;
-	        fileMap[key] = "locales/" + locale + ".json";
-
-	        return _mainFileFetcher.get(key)
-	            .then(function (d) {
-	                _localeStrings[locale] = d[locale];
-	                return locale;
-	            });
-	    };
-
-	    /**
-	    * Given a string identifier, try to find that string in the current
-	    * language, and return it.  This function will be called recursively
-	    * with locale `en` if a string can not be found in the requested language.
-	    *
-	    * @param  {string}   s             string identifier
-	    * @param  {object?}  replacements  token replacements and default string
-	    * @param  {string?}  locale        locale to use (defaults to currentLocale)
-	    * @return {string?}  localized string
-	    */
-	    localizer.t = function(s, replacements, locale) {
-	        locale = locale || _localeCode;
-
-	        // US English is the default
-	        if (locale.toLowerCase() === 'en-us') { locale = 'en'; }
-
-	        var path = s
-	          .split('.')
-	          .map(function (s) { return s.replace(/<TX_DOT>/g, '.'); })
-	          .reverse();
-
-	        var result = _localeStrings[locale];
-
-	        while (result !== undefined && path.length) {
-	          result = result[path.pop()];
-	        }
-
-	        if (result !== undefined) {
-	          if (replacements) {
-	            for (var k in replacements) {
-	              var token = "{" + k + "}";
-	              var regex = new RegExp(token, 'g');
-	              result = result.replace(regex, replacements[k]);
-	            }
-	          }
-	          return result;
-	        }
-
-	        if (locale !== 'en') {
-	          return localizer.t(s, replacements, 'en');  // fallback - recurse with 'en'
-	        }
-
-	        if (replacements && 'default' in replacements) {
-	          return replacements.default;      // fallback - replacements.default
-	        }
-
-	        var missing = "Missing " + locale + " translation: " + s;
-	        if (typeof console !== 'undefined') { console.error(missing); }  // eslint-disable-line
-
-	        return missing;
-	    };
-
-	    localizer.languageName = function (code, options) {
-
-	        if (_languageNames[code]) {  // name in locale langauge
-	          // e.g. "German"
-	          return _languageNames[code];
-	        }
-
-	        // sometimes we only want the local name
-	        if (options && options.localOnly) { return null; }
-
-	        var langInfo = _dataLanguages[code];
-	        if (langInfo) {
-	          if (langInfo.nativeName) {  // name in native language
-	            // e.g. "Deutsch (de)"
-	            return localizer.t('translate.language_and_code', { language: langInfo.nativeName, code: code });
-
-	          } else if (langInfo.base && langInfo.script) {
-	            var base = langInfo.base;   // the code of the langauge this is based on
-
-	            if (_languageNames[base]) {   // base language name in locale langauge
-	              var scriptCode = langInfo.script;
-	              var script = _scriptNames[scriptCode] || scriptCode;
-	              // e.g. "Serbian (Cyrillic)"
-	              return localizer.t('translate.language_and_code', { language: _languageNames[base], code: script });
-
-	            } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
-	              // e.g. "српски (sr-Cyrl)"
-	              return localizer.t('translate.language_and_code', { language: _dataLanguages[base].nativeName, code: code });
-	            }
-	          }
-	        }
-	        return code;  // if not found, use the code
-	    };
-
-	    return localizer;
-	}
-
-	//
-	// `presetCollection` is a wrapper around an `Array` of presets `collection`,
-	// and decorated with some extra methods for searching and matching geometry
-	//
-	function presetCollection(collection) {
-	  var MAXRESULTS = 50;
-	  var _this = {};
-	  var _memo = {};
-
-	  _this.collection = collection;
-
-	  _this.item = function (id) {
-	    if (_memo[id]) { return _memo[id]; }
-	    var found = _this.collection.find(function (d) { return d.id === id; });
-	    if (found) { _memo[id] = found; }
-	    return found;
-	  };
-
-	  _this.index = function (id) { return _this.collection.findIndex(function (d) { return d.id === id; }); };
-
-	  _this.matchGeometry = function (geometry) {
-	    return presetCollection(
-	      _this.collection.filter(function (d) { return d.matchGeometry(geometry); })
-	    );
-	  };
-
-	  _this.matchAllGeometry = function (geometries) {
-	    return presetCollection(
-	      _this.collection.filter(function (d) { return d && d.matchAllGeometry(geometries); })
-	    );
-	  };
-
-	  _this.matchAnyGeometry = function (geometries) {
-	    return presetCollection(
-	      _this.collection.filter(function (d) { return geometries.some(function (geom) { return d.matchGeometry(geom); }); })
-	    );
-	  };
-
-	  _this.fallback = function (geometry) {
-	    var id = geometry;
-	    if (id === 'vertex') { id = 'point'; }
-	    return _this.item(id);
-	  };
-
-	  _this.search = function (value, geometry, countryCode) {
-	    if (!value) { return _this; }
-
-	    value = value.toLowerCase().trim();
-
-	    // match at name beginning or just after a space (e.g. "office" -> match "Law Office")
-	    function leading(a) {
-	      var index = a.indexOf(value);
-	      return index === 0 || a[index - 1] === ' ';
-	    }
-
-	    // match at name beginning only
-	    function leadingStrict(a) {
-	      var index = a.indexOf(value);
-	      return index === 0;
-	    }
-
-	    function sortNames(a, b) {
-	      var aCompare = (a.suggestion ? a.originalName : a.name()).toLowerCase();
-	      var bCompare = (b.suggestion ? b.originalName : b.name()).toLowerCase();
-
-	      // priority if search string matches preset name exactly - #4325
-	      if (value === aCompare) { return -1; }
-	      if (value === bCompare) { return 1; }
-
-	      // priority for higher matchScore
-	      var i = b.originalScore - a.originalScore;
-	      if (i !== 0) { return i; }
-
-	      // priority if search string appears earlier in preset name
-	      i = aCompare.indexOf(value) - bCompare.indexOf(value);
-	      if (i !== 0) { return i; }
-
-	      // priority for shorter preset names
-	      return aCompare.length - bCompare.length;
-	    }
-
-	    var pool = _this.collection;
-	    if (countryCode) {
-	      pool = pool.filter(function (a) {
-	        if (a.countryCodes && a.countryCodes.indexOf(countryCode) === -1) { return false; }
-	        if (a.notCountryCodes && a.notCountryCodes.indexOf(countryCode) !== -1) { return false; }
-	        return true;
-	      });
-	    }
-	    var searchable = pool.filter(function (a) { return a.searchable !== false && a.suggestion !== true; });
-	    var suggestions = pool.filter(function (a) { return a.suggestion === true; });
-
-	    // matches value to preset.name
-	    var leading_name = searchable
-	      .filter(function (a) { return leading(a.name().toLowerCase()); })
-	      .sort(sortNames);
-
-	    // matches value to preset suggestion name (original name is unhyphenated)
-	    var leading_suggestions = suggestions
-	      .filter(function (a) { return leadingStrict(a.originalName.toLowerCase()); })
-	      .sort(sortNames);
-
-	    // matches value to preset.terms values
-	    var leading_terms = searchable
-	      .filter(function (a) { return (a.terms() || []).some(leading); });
-
-	    // matches value to preset.tags values
-	    var leading_tag_values = searchable
-	      .filter(function (a) { return Object.values(a.tags || {}).filter(function (val) { return val !== '*'; }).some(leading); });
-
-	    // finds close matches to value in preset.name
-	    var similar_name = searchable
-	      .map(function (a) { return ({ preset: a, dist: utilEditDistance(value, a.name()) }); })
-	      .filter(function (a) { return a.dist + Math.min(value.length - a.preset.name().length, 0) < 3; })
-	      .sort(function (a, b) { return a.dist - b.dist; })
-	      .map(function (a) { return a.preset; });
-
-	    // finds close matches to value to preset suggestion name (original name is unhyphenated)
-	    var similar_suggestions = suggestions
-	      .map(function (a) { return ({ preset: a, dist: utilEditDistance(value, a.originalName.toLowerCase()) }); })
-	      .filter(function (a) { return a.dist + Math.min(value.length - a.preset.originalName.length, 0) < 1; })
-	      .sort(function (a, b) { return a.dist - b.dist; })
-	      .map(function (a) { return a.preset; });
-
-	    // finds close matches to value in preset.terms
-	    var similar_terms = searchable
-	      .filter(function (a) {
-	        return (a.terms() || []).some(function (b) {
-	          return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
-	        });
-	      });
-
-	    var results = leading_name.concat(
-	      leading_suggestions,
-	      leading_terms,
-	      leading_tag_values,
-	      similar_name,
-	      similar_suggestions,
-	      similar_terms
-	    ).slice(0, MAXRESULTS - 1);
-
-	    if (geometry) {
-	      if (typeof geometry === 'string') {
-	        results.push(_this.fallback(geometry));
-	      } else {
-	        geometry.forEach(function (geom) { return results.push(_this.fallback(geom)); });
-	      }
-	    }
-
-	    return presetCollection(utilArrayUniq(results));
-	  };
-
-
-	  return _this;
-	}
-
-	//
-	// `presetCategory` builds a `presetCollection` of member presets,
-	// decorated with some extra methods for searching and matching geometry
-	//
-	function presetCategory(categoryID, category, all) {
-	  var _this = Object.assign({}, category);   // shallow copy
-
-	  _this.id = categoryID;
-
-	  _this.members = presetCollection(
-	    category.members.map(function (presetID) { return all.item(presetID); }).filter(Boolean)
-	  );
-
-	  _this.geometry = _this.members.collection
-	    .reduce(function (acc, preset) {
-	      for (var i in preset.geometry) {
-	        var geometry = preset.geometry[i];
-	        if (acc.indexOf(geometry) === -1) {
-	          acc.push(geometry);
-	        }
-	      }
-	      return acc;
-	    }, []);
-
-	  _this.matchGeometry = function (geom) { return _this.geometry.indexOf(geom) >= 0; };
-
-	  _this.matchAllGeometry = function (geometries) { return _this.members.collection
-	    .some(function (preset) { return preset.matchAllGeometry(geometries); }); };
-
-	  _this.matchScore = function () { return -1; };
-
-	  _this.name = function () { return _t(("presets.categories." + categoryID + ".name"), { 'default': categoryID }); };
-
-	  _this.terms = function () { return []; };
-
-
-	  return _this;
-	}
-
-	//
-	// `presetField` decorates a given `field` Object
-	// with some extra methods for searching and matching geometry
-	//
-	function presetField(fieldID, field) {
-	  var _this = Object.assign({}, field);   // shallow copy
-
-	  _this.id = fieldID;
-
-	  // for use in classes, element ids, css selectors
-	  _this.safeid = utilSafeClassName(fieldID);
-
-	  _this.matchGeometry = function (geom) { return !_this.geometry || _this.geometry.indexOf(geom) !== -1; };
-
-	  _this.matchAllGeometry = function (geometries) {
-	    return !_this.geometry || geometries.every(function (geom) { return _this.geometry.indexOf(geom) !== -1; });
-	  };
-
-	  _this.t = function (scope, options) { return _t(("presets.fields." + fieldID + "." + scope), options); };
-
-	  _this.label = function () { return _this.overrideLabel || _this.t('label', { 'default': fieldID }); };
-
-	  var _placeholder = _this.placeholder;
-	  _this.placeholder = function () { return _this.t('placeholder', { 'default': _placeholder }); };
-
-	  _this.originalTerms = (_this.terms || []).join();
-
-	  _this.terms = function () { return _this.t('terms', { 'default': _this.originalTerms })
-	    .toLowerCase().trim().split(/\s*,+\s*/); };
-
-
-	  return _this;
-	}
-
-	//
-	// `presetPreset` decorates a given `preset` Object
-	// with some extra methods for searching and matching geometry
-	//
-	function presetPreset(presetID, preset, addable, allFields, allPresets) {
-	  allFields = allFields || {};
-	  allPresets = allPresets || {};
-	  var _this = Object.assign({}, preset);   // shallow copy
-	  var _addable = addable || false;
-	  var _resolvedFields;      // cache
-	  var _resolvedMoreFields;  // cache
-
-	  _this.id = presetID;
-
-	  _this.safeid = utilSafeClassName(presetID);  // for use in css classes, selectors, element ids
-
-	  _this.originalTerms = (_this.terms || []).join();
-
-	  _this.originalName = _this.name || '';
-
-	  _this.originalScore = _this.matchScore || 1;
-
-	  _this.originalReference = _this.reference || {};
-
-	  _this.originalFields = (_this.fields || []);
-
-	  _this.originalMoreFields = (_this.moreFields || []);
-
-	  _this.fields = function () { return _resolvedFields || (_resolvedFields = resolve('fields')); };
-
-	  _this.moreFields = function () { return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields')); };
-
-	  _this.resetFields = function () { return _resolvedFields = _resolvedMoreFields = null; };
-
-	  _this.tags = _this.tags || {};
-
-	  _this.addTags = _this.addTags || _this.tags;
-
-	  _this.removeTags = _this.removeTags || _this.addTags;
-
-	  _this.geometry = (_this.geometry || []);
-
-	  _this.matchGeometry = function (geom) { return _this.geometry.indexOf(geom) >= 0; };
-
-	  _this.matchAllGeometry = function (geoms) { return geoms.every(_this.matchGeometry); };
-
-	  _this.matchScore = function (entityTags) {
-	    var tags = _this.tags;
-	    var seen = {};
-	    var score = 0;
-
-	    // match on tags
-	    for (var k in tags) {
-	      seen[k] = true;
-	      if (entityTags[k] === tags[k]) {
-	        score += _this.originalScore;
-	      } else if (tags[k] === '*' && k in entityTags) {
-	        score += _this.originalScore / 2;
-	      } else {
-	        return -1;
-	      }
-	    }
-
-	    // boost score for additional matches in addTags - #6802
-	    var addTags = _this.addTags;
-	    for (var k$1 in addTags) {
-	      if (!seen[k$1] && entityTags[k$1] === addTags[k$1]) {
-	        score += _this.originalScore;
-	      }
-	    }
-
-	    return score;
-	  };
-
-
-	  var _textCache = {};
-	  _this.t = function (scope, options) {
-	    var textID = "presets.presets." + presetID + "." + scope;
-	    if (_textCache[textID]) { return _textCache[textID]; }
-	    return _textCache[textID] = _t(textID, options);
-	  };
-
-
-	  _this.name = function () {
-	    if (_this.suggestion) {
-	      var path = presetID.split('/');
-	      path.pop();  // remove brand name
-	      // NOTE: insert an en-dash, not a hypen (to avoid conflict with fr - nl names in Brussels etc)
-	      return _this.originalName + ' – ' + _t('presets.presets.' + path.join('/') + '.name');
-	    }
-	    return _this.t('name', { 'default': _this.originalName });
-	  };
-
-
-	  _this.terms = function () { return _this.t('terms', { 'default': _this.originalTerms })
-	    .toLowerCase().trim().split(/\s*,+\s*/); };
-
-
-	  _this.isFallback = function () {
-	    var tagCount = Object.keys(_this.tags).length;
-	    return tagCount === 0 || (tagCount === 1 && _this.tags.hasOwnProperty('area'));
-	  };
-
-
-	  _this.addable = function(val) {
-	    if (!arguments.length) { return _addable; }
-	    _addable = val;
-	    return _this;
-	  };
-
-
-	  _this.reference = function (geom) {
-	    // Lookup documentation on Wikidata...
-	    var qid = _this.tags.wikidata || _this.tags['brand:wikidata'] || _this.tags['operator:wikidata'];
-	    if (qid) {
-	      return { qid: qid };
-	    }
-
-	    // Lookup documentation on OSM Wikibase...
-	    var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
-	    var value = _this.originalReference.value || _this.tags[key];
-
-	    if (geom === 'relation' && key === 'type') {
-	      if (value in _this.tags) {
-	        key = value;
-	        value = _this.tags[key];
-	      } else {
-	        return { rtype: value };
-	      }
-	    }
-
-	    if (value === '*') {
-	      return { key: key };
-	    } else {
-	      return { key: key, value: value };
-	    }
-	  };
-
-
-	  _this.unsetTags = function (tags, geometry, skipFieldDefaults) {
-	    tags = utilObjectOmit(tags, Object.keys(_this.removeTags));
-
-	    if (geometry && !skipFieldDefaults) {
-	      _this.fields().forEach(function (field) {
-	        if (field.matchGeometry(geometry) && field.key && field.default === tags[field.key]) {
-	          delete tags[field.key];
-	        }
-	      });
-	    }
-
-	    delete tags.area;
-	    return tags;
-	  };
-
-
-	  _this.setTags = function (tags, geometry, skipFieldDefaults) {
-	    var addTags = _this.addTags;
-	    tags = Object.assign({}, tags);   // shallow copy
-
-	    for (var k in addTags) {
-	      if (addTags[k] === '*') {
-	        tags[k] = 'yes';
-	      } else {
-	        tags[k] = addTags[k];
-	      }
-	    }
-
-	    // Add area=yes if necessary.
-	    // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
-	    // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
-	    // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)
-	    if (!addTags.hasOwnProperty('area')) {
-	      delete tags.area;
-	      if (geometry === 'area') {
-	        var needsAreaTag = true;
-	        if (_this.geometry.indexOf('line') === -1) {
-	          for (var k$1 in addTags) {
-	            if (k$1 in osmAreaKeys) {
-	              needsAreaTag = false;
-	              break;
-	            }
-	          }
-	        }
-	        if (needsAreaTag) {
-	          tags.area = 'yes';
-	        }
-	      }
-	    }
-
-	    if (geometry && !skipFieldDefaults) {
-	      _this.fields().forEach(function (field) {
-	        if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field.default) {
-	          tags[field.key] = field.default;
-	        }
-	      });
-	    }
-
-	    return tags;
-	  };
-
-
-	  // For a preset without fields, use the fields of the parent preset.
-	  // Replace {preset} placeholders with the fields of the specified presets.
-	  function resolve(which) {
-	    var fieldIDs = (which === 'fields' ? _this.originalFields : _this.originalMoreFields);
-	    var resolved = [];
-
-	    fieldIDs.forEach(function (fieldID) {
-	      var match = fieldID.match(/\{(.*)\}/);
-	      if (match !== null) {    // a presetID wrapped in braces {}
-	        resolved = resolved.concat(inheritFields(match[1], which));
-	      } else if (allFields[fieldID]) {    // a normal fieldID
-	        resolved.push(allFields[fieldID]);
-	      } else {
-	        console.log(("Cannot resolve \"" + fieldID + "\" found in " + (_this.id) + "." + which));  // eslint-disable-line no-console
-	      }
-	    });
-
-	    // no fields resolved, so use the parent's if possible
-	    if (!resolved.length) {
-	      var endIndex = _this.id.lastIndexOf('/');
-	      var parentID = endIndex && _this.id.substring(0, endIndex);
-	      if (parentID) {
-	        resolved = inheritFields(parentID, which);
-	      }
-	    }
-
-	    return utilArrayUniq(resolved);
-
-
-	    // returns an array of fields to inherit from the given presetID, if found
-	    function inheritFields(presetID, which) {
-	      var parent = allPresets[presetID];
-	      if (!parent) { return []; }
-
-	      if (which === 'fields') {
-	        return parent.fields().filter(shouldInherit);
-	      } else if (which === 'moreFields') {
-	        return parent.moreFields();
-	      } else {
-	        return [];
-	      }
-	    }
-
-
-	    // Skip `fields` for the keys which define the preset.
-	    // These are usually `typeCombo` fields like `shop=*`
-	    function shouldInherit(f) {
-	      if (f.key && _this.tags[f.key] !== undefined &&
-	        // inherit anyway if multiple values are allowed or just a checkbox
-	        f.type !== 'multiCombo' && f.type !== 'semiCombo' && f.type !== 'check'
-	      ) { return false; }
-
-	      return true;
-	    }
-	  }
-
-
-	  return _this;
-	}
-
-	var _mainPresetIndex = presetIndex(); // singleton
-
-	//
-	// `presetIndex` wraps a `presetCollection`
-	// with methods for loading new data and returning defaults
-	//
-	function presetIndex() {
-	  var dispatch$1 = dispatch('favoritePreset', 'recentsChange');
-	  var MAXRECENTS = 30;
-
-	  // seed the preset lists with geometry fallbacks
-	  var POINT = presetPreset('point', { name: 'Point', tags: {}, geometry: ['point', 'vertex'], matchScore: 0.1 } );
-	  var LINE = presetPreset('line', { name: 'Line', tags: {}, geometry: ['line'], matchScore: 0.1 } );
-	  var AREA = presetPreset('area', { name: 'Area', tags: { area: 'yes' }, geometry: ['area'], matchScore: 0.1 } );
-	  var RELATION = presetPreset('relation', { name: 'Relation', tags: {}, geometry: ['relation'], matchScore: 0.1 } );
-
-	  var _this = presetCollection([POINT, LINE, AREA, RELATION]);
-	  var _presets = { point: POINT, line: LINE, area: AREA, relation: RELATION };
-
-	  var _defaults = {
-	    point: presetCollection([POINT]),
-	    vertex: presetCollection([POINT]),
-	    line: presetCollection([LINE]),
-	    area: presetCollection([AREA]),
-	    relation: presetCollection([RELATION])
-	  };
-
-	  var _fields = {};
-	  var _categories = {};
-	  var _universal = [];
-	  var _addablePresetIDs = null;   // Set of preset IDs that the user can add
-	  var _recents;
-	  var _favorites;
-
-	  // Index of presets by (geometry, tag key).
-	  var _geometryIndex = { point: {}, vertex: {}, line: {}, area: {}, relation: {} };
-
-	  var _loadPromise;
-
-	  _this.ensureLoaded = function () {
-	    if (_loadPromise) { return _loadPromise; }
-
-	    return _loadPromise = Promise.all([
-	        _mainFileFetcher.get('preset_categories'),
-	        _mainFileFetcher.get('preset_defaults'),
-	        _mainFileFetcher.get('preset_presets'),
-	        _mainFileFetcher.get('preset_fields')
-	      ])
-	      .then(function (vals) {
-	        _this.merge({
-	          categories: vals[0],
-	          defaults: vals[1],
-	          presets: vals[2],
-	          fields: vals[3]
-	        });
-	        osmSetAreaKeys(_this.areaKeys());
-	        osmSetPointTags(_this.pointTags());
-	        osmSetVertexTags(_this.vertexTags());
-	      });
-	  };
-
-
-	  _this.merge = function (d) {
-	    // Merge Fields
-	    if (d.fields) {
-	      Object.keys(d.fields).forEach(function (fieldID) {
-	        var f = d.fields[fieldID];
-	        if (f) {   // add or replace
-	          _fields[fieldID] = presetField(fieldID, f);
-	        } else {   // remove
-	          delete _fields[fieldID];
-	        }
-	      });
-	    }
-
-	    // Merge Presets
-	    if (d.presets) {
-	      Object.keys(d.presets).forEach(function (presetID) {
-	        var p = d.presets[presetID];
-	        if (p) {   // add or replace
-	          var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
-	          _presets[presetID] = presetPreset(presetID, p, isAddable, _fields, _presets);
-	        } else {   // remove (but not if it's a fallback)
-	          var existing = _presets[presetID];
-	          if (existing && !existing.isFallback()) {
-	            delete _presets[presetID];
-	          }
-	        }
-	      });
-	    }
-
-	    // Need to rebuild _this.collection before loading categories
-	    _this.collection = Object.values(_presets).concat(Object.values(_categories));
-
-	    // Merge Categories
-	    if (d.categories) {
-	      Object.keys(d.categories).forEach(function (categoryID) {
-	        var c = d.categories[categoryID];
-	        if (c) {   // add or replace
-	          _categories[categoryID] = presetCategory(categoryID, c, _this);
-	        } else {   // remove
-	          delete _categories[categoryID];
-	        }
-	      });
-	    }
-
-	    // Rebuild _this.collection after loading categories
-	    _this.collection = Object.values(_presets).concat(Object.values(_categories));
-
-	    // Merge Defaults
-	    if (d.defaults) {
-	      Object.keys(d.defaults).forEach(function (geometry) {
-	        var def = d.defaults[geometry];
-	        if (Array.isArray(def)) {   // add or replace
-	          _defaults[geometry] = presetCollection(
-	            def.map(function (id) { return _presets[id] || _categories[id]; }).filter(Boolean)
-	          );
-	        } else {   // remove
-	          delete _defaults[geometry];
-	        }
-	      });
-	    }
-
-	    // Rebuild universal fields array
-	    _universal = Object.values(_fields).filter(function (field) { return field.universal; });
-
-	    // Reset all the preset fields - they'll need to be resolved again
-	    Object.values(_presets).forEach(function (preset) { return preset.resetFields(); });
-
-	    // Rebuild geometry index
-	    _geometryIndex = { point: {}, vertex: {}, line: {}, area: {}, relation: {} };
-	    _this.collection.forEach(function (preset) {
-	      (preset.geometry || []).forEach(function (geometry) {
-	        var g = _geometryIndex[geometry];
-	        for (var key in preset.tags) {
-	          (g[key] = g[key] || []).push(preset);
-	        }
-	      });
-	    });
-
-	    return _this;
-	  };
-
-
-	  _this.match = function (entity, resolver) {
-	    return resolver.transient(entity, 'presetMatch', function () {
-	      var geometry = entity.geometry(resolver);
-	      // Treat entities on addr:interpolation lines as points, not vertices - #3241
-	      if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
-	        geometry = 'point';
-	      }
-	      return _this.matchTags(entity.tags, geometry);
-	    });
-	  };
-
-
-	  _this.matchTags = function (tags, geometry) {
-	    var geometryMatches = _geometryIndex[geometry];
-	    var address;
-	    var best = -1;
-	    var match;
-
-	    for (var k in tags) {
-	      // If any part of an address is present, allow fallback to "Address" preset - #4353
-	      if (/^addr:/.test(k) && geometryMatches['addr:*']) {
-	        address = geometryMatches['addr:*'][0];
-	      }
-
-	      var keyMatches = geometryMatches[k];
-	      if (!keyMatches) { continue; }
-
-	      for (var i = 0; i < keyMatches.length; i++) {
-	        var score = keyMatches[i].matchScore(tags);
-	        if (score > best) {
-	          best = score;
-	          match = keyMatches[i];
-	        }
-	      }
-	    }
-
-	    if (address && (!match || match.isFallback())) {
-	      match = address;
-	    }
-	    return match || _this.fallback(geometry);
-	  };
-
-
-	  _this.allowsVertex = function (entity, resolver) {
-	    if (entity.type !== 'node') { return false; }
-	    if (Object.keys(entity.tags).length === 0) { return true; }
-
-	    return resolver.transient(entity, 'vertexMatch', function () {
-	      // address lines allow vertices to act as standalone points
-	      if (entity.isOnAddressLine(resolver)) { return true; }
-
-	      var geometries = osmNodeGeometriesForTags(entity.tags);
-	      if (geometries.vertex) { return true; }
-	      if (geometries.point) { return false; }
-	      // allow vertices for unspecified points
-	      return true;
-	    });
-	  };
-
-
-	  // Because of the open nature of tagging, iD will never have a complete
-	  // list of tags used in OSM, so we want it to have logic like "assume
-	  // that a closed way with an amenity tag is an area, unless the amenity
-	  // is one of these specific types". This function computes a structure
-	  // that allows testing of such conditions, based on the presets designated
-	  // as as supporting (or not supporting) the area geometry.
-	  //
-	  // The returned object L is a keeplist/discardlist of tags. A closed way
-	  // with a tag (k, v) is considered to be an area if `k in L && !(v in L[k])`
-	  // (see `Way#isArea()`). In other words, the keys of L form the keeplist,
-	  // and the subkeys form the discardlist.
-	  _this.areaKeys = function () {
-	    // The ignore list is for keys that imply lines. (We always add `area=yes` for exceptions)
-	    var ignore = ['barrier', 'highway', 'footway', 'railway', 'junction', 'type'];
-	    var areaKeys = {};
-
-	    // ignore name-suggestion-index and deprecated presets
-	    var presets = _this.collection.filter(function (p) { return !p.suggestion && !p.replacement; });
-
-	    // keeplist
-	    presets.forEach(function (p) {
-	      var key;
-	      for (key in p.tags) { break; }  // pick the first tag
-	      if (!key) { return; }
-	      if (ignore.indexOf(key) !== -1) { return; }
-
-	      if (p.geometry.indexOf('area') !== -1) {    // probably an area..
-	        areaKeys[key] = areaKeys[key] || {};
-	      }
-	    });
-
-	    // discardlist
-	    presets.forEach(function (p) {
-	      var key;
-	      for (key in p.addTags) {
-	        // examine all addTags to get a better sense of what can be tagged on lines - #6800
-	        var value = p.addTags[key];
-	        if (key in areaKeys &&                    // probably an area...
-	          p.geometry.indexOf('line') !== -1 &&    // but sometimes a line
-	          value !== '*') {
-	          areaKeys[key][value] = true;
-	        }
-	      }
-	    });
-
-	    return areaKeys;
-	  };
-
-
-	  _this.pointTags = function () {
-	    return _this.collection.reduce(function (pointTags, d) {
-	      // ignore name-suggestion-index, deprecated, and generic presets
-	      if (d.suggestion || d.replacement || d.searchable === false) { return pointTags; }
-
-	      // only care about the primary tag
-	      var key;
-	      for (key in d.tags) { break; }  // pick the first tag
-	      if (!key) { return pointTags; }
-
-	      // if this can be a point
-	      if (d.geometry.indexOf('point') !== -1) {
-	        pointTags[key] = pointTags[key] || {};
-	        pointTags[key][d.tags[key]] = true;
-	      }
-	      return pointTags;
-	    }, {});
-	  };
-
-
-	  _this.vertexTags = function () {
-	    return _this.collection.reduce(function (vertexTags, d) {
-	      // ignore name-suggestion-index, deprecated, and generic presets
-	      if (d.suggestion || d.replacement || d.searchable === false) { return vertexTags; }
-
-	      // only care about the primary tag
-	      var key;
-	      for (key in d.tags) { break; }   // pick the first tag
-	      if (!key) { return vertexTags; }
-
-	      // if this can be a vertex
-	      if (d.geometry.indexOf('vertex') !== -1) {
-	        vertexTags[key] = vertexTags[key] || {};
-	        vertexTags[key][d.tags[key]] = true;
-	      }
-	      return vertexTags;
-	    }, {});
-	  };
-
-
-	  _this.field = function (id) { return _fields[id]; };
-
-	  _this.universal = function () { return _universal; };
-
-
-	  _this.defaults = function (geometry, n, startWithRecents) {
-	    var recents = [];
-	    if (startWithRecents) {
-	      recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
-	    }
-	    var defaults;
-	    if (_addablePresetIDs) {
-	      defaults = Array.from(_addablePresetIDs).map(function(id) {
-	        var preset = _this.item(id);
-	        if (preset && preset.matchGeometry(geometry)) { return preset; }
-	        return null;
-	      }).filter(Boolean);
-	    } else {
-	      defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
-	    }
-
-	    return presetCollection(
-	      utilArrayUniq(recents.concat(defaults)).slice(0, n - 1)
-	    );
-	  };
-
-	  // pass a Set of addable preset ids
-	  _this.addablePresetIDs = function(val) {
-	    if (!arguments.length) { return _addablePresetIDs; }
-
-	    // accept and convert arrays
-	    if (Array.isArray(val)) { val = new Set(val); }
-
-	    _addablePresetIDs = val;
-	    if (_addablePresetIDs) {   // reset all presets
-	      _this.collection.forEach(function (p) {
-	        // categories aren't addable
-	        if (p.addable) { p.addable(_addablePresetIDs.has(p.id)); }
-	      });
-	    } else {
-	      _this.collection.forEach(function (p) {
-	        if (p.addable) { p.addable(true); }
-	      });
-	    }
-
-	    return _this;
-	  };
-
-
-	  _this.recent = function () {
-	    return presetCollection(
-	      utilArrayUniq(_this.getRecents().map(function (d) { return d.preset; }))
-	    );
-	  };
-
-
-	  function RibbonItem(preset, source) {
-	    var item = {};
-	    item.preset = preset;
-	    item.source = source;
-
-	    item.isFavorite = function () { return item.source === 'favorite'; };
-	    item.isRecent = function () { return item.source === 'recent'; };
-	    item.matches = function (preset) { return item.preset.id === preset.id; };
-	    item.minified = function () { return ({ pID: item.preset.id }); };
-
-	    return item;
-	  }
-
-
-	  function ribbonItemForMinified(d, source) {
-	    if (d && d.pID) {
-	      var preset = _this.item(d.pID);
-	      if (!preset) { return null; }
-	      return RibbonItem(preset, source);
-	    }
-	    return null;
-	  }
-
-
-	  _this.getGenericRibbonItems = function () {
-	    return ['point', 'line', 'area'].map(function (id) { return RibbonItem(_this.item(id), 'generic'); });
-	  };
-
-
-	  _this.getAddable = function () {
-	      if (!_addablePresetIDs) { return []; }
-
-	      return _addablePresetIDs.map(function (id) {
-	        var preset = _this.item(id);
-	        if (preset) {
-	          return RibbonItem(preset, 'addable');
-	        }
-	      }).filter(Boolean);
-	  };
-
-
-	  function setRecents(items) {
-	    _recents = items;
-	    var minifiedItems = items.map(function (d) { return d.minified(); });
-	    corePreferences('preset_recents', JSON.stringify(minifiedItems));
-	    dispatch$1.call('recentsChange');
-	  }
-
-
-	  _this.getRecents = function () {
-	    if (!_recents) {
-	      // fetch from local storage
-	      _recents = (JSON.parse(corePreferences('preset_recents')) || [])
-	        .reduce(function (acc, d) {
-	          var item = ribbonItemForMinified(d, 'recent');
-	          if (item && item.preset.addable()) { acc.push(item); }
-	          return acc;
-	        }, []);
-	    }
-	    return _recents;
-	  };
-
-
-	  _this.addRecent = function (preset, besidePreset, after) {
-	    var recents = _this.getRecents();
-
-	    var beforeItem = _this.recentMatching(besidePreset);
-	    var toIndex = recents.indexOf(beforeItem);
-	    if (after) { toIndex += 1; }
-
-	    var newItem = RibbonItem(preset, 'recent');
-	    recents.splice(toIndex, 0, newItem);
-	    setRecents(recents);
-	  };
-
-
-	  _this.removeRecent = function (preset) {
-	    var item = _this.recentMatching(preset);
-	    if (item) {
-	      var items = _this.getRecents();
-	      items.splice(items.indexOf(item), 1);
-	      setRecents(items);
-	    }
-	  };
-
-
-	  _this.recentMatching = function (preset) {
-	    var items = _this.getRecents();
-	    for (var i in items) {
-	      if (items[i].matches(preset)) {
-	        return items[i];
-	      }
-	    }
-	    return null;
-	  };
-
-
-	  _this.moveItem = function (items, fromIndex, toIndex) {
-	    if (fromIndex === toIndex ||
-	      fromIndex < 0 || toIndex < 0 ||
-	      fromIndex >= items.length || toIndex >= items.length
-	    ) { return null; }
-
-	    items.splice(toIndex, 0, items.splice(fromIndex, 1)[0]);
-	    return items;
-	  };
-
-
-	  _this.moveRecent = function (item, beforeItem) {
-	    var recents = _this.getRecents();
-	    var fromIndex = recents.indexOf(item);
-	    var toIndex = recents.indexOf(beforeItem);
-	    var items = _this.moveItem(recents, fromIndex, toIndex);
-	    if (items) { setRecents(items); }
-	  };
-
-
-	  _this.setMostRecent = function (preset) {
-	    if (preset.searchable === false) { return; }
-
-	    var items = _this.getRecents();
-	    var item = _this.recentMatching(preset);
-	    if (item) {
-	      items.splice(items.indexOf(item), 1);
-	    } else {
-	      item = RibbonItem(preset, 'recent');
-	    }
-
-	    // remove the last recent (first in, first out)
-	    while (items.length >= MAXRECENTS) {
-	      items.pop();
-	    }
-
-	    // prepend array
-	    items.unshift(item);
-	    setRecents(items);
-	  };
-
-	  function setFavorites(items) {
-	    _favorites = items;
-	    var minifiedItems = items.map(function (d) { return d.minified(); });
-	    corePreferences('preset_favorites', JSON.stringify(minifiedItems));
-
-	    // call update
-	    dispatch$1.call('favoritePreset');
-	  }
-
-	  _this.addFavorite = function (preset, besidePreset, after) {
-	      var favorites = _this.getFavorites();
-
-	      var beforeItem = _this.favoriteMatching(besidePreset);
-	      var toIndex = favorites.indexOf(beforeItem);
-	      if (after) { toIndex += 1; }
-
-	      var newItem = RibbonItem(preset, 'favorite');
-	      favorites.splice(toIndex, 0, newItem);
-	      setFavorites(favorites);
-	  };
-
-	  _this.toggleFavorite = function (preset) {
-	    var favs = _this.getFavorites();
-	    var favorite = _this.favoriteMatching(preset);
-	    if (favorite) {
-	      favs.splice(favs.indexOf(favorite), 1);
-	    } else {
-	      // only allow 10 favorites
-	      if (favs.length === 10) {
-	          // remove the last favorite (last in, first out)
-	          favs.pop();
-	      }
-	      // append array
-	      favs.push(RibbonItem(preset, 'favorite'));
-	    }
-	    setFavorites(favs);
-	  };
-
-
-	  _this.removeFavorite = function (preset) {
-	    var item = _this.favoriteMatching(preset);
-	    if (item) {
-	      var items = _this.getFavorites();
-	      items.splice(items.indexOf(item), 1);
-	      setFavorites(items);
-	    }
-	  };
-
-
-	  _this.getFavorites = function () {
-	    if (!_favorites) {
-
-	      // fetch from local storage
-	      var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
-
-	      if (!rawFavorites) {
-	        rawFavorites = [];
-	        corePreferences('preset_favorites', JSON.stringify(rawFavorites));
-	      }
-
-	      _favorites = rawFavorites.reduce(function (output, d) {
-	        var item = ribbonItemForMinified(d, 'favorite');
-	        if (item && item.preset.addable()) { output.push(item); }
-	        return output;
-	      }, []);
-	    }
-	    return _favorites;
-	  };
-
-
-	  _this.favoriteMatching = function (preset) {
-	    var favs = _this.getFavorites();
-	    for (var index in favs) {
-	      if (favs[index].matches(preset)) {
-	        return favs[index];
-	      }
-	    }
-	    return null;
-	  };
-
-
-	  return utilRebind(_this, dispatch$1, 'on');
-	}
-
-	function utilTagText(entity) {
-	    var obj = (entity && entity.tags) || {};
-	    return Object.keys(obj)
-	        .map(function(k) { return k + '=' + obj[k]; })
-	        .join(', ');
-	}
-
-
-	function utilTotalExtent(array, graph) {
-	    var extent = geoExtent();
-	    var val, entity;
-	    for (var i = 0; i < array.length; i++) {
-	        val = array[i];
-	        entity = typeof val === 'string' ? graph.hasEntity(val) : val;
-	        if (entity) {
-	            extent._extend(entity.extent(graph));
-	        }
-	    }
-	    return extent;
-	}
-
-
-	function utilTagDiff(oldTags, newTags) {
-	    var tagDiff = [];
-	    var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
-	    keys.forEach(function(k) {
-	        var oldVal = oldTags[k];
-	        var newVal = newTags[k];
-
-	        if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
-	            tagDiff.push({
-	                type: '-',
-	                key: k,
-	                oldVal: oldVal,
-	                newVal: newVal,
-	                display: '- ' + k + '=' + oldVal
-	            });
-	        }
-	        if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
-	            tagDiff.push({
-	                type: '+',
-	                key: k,
-	                oldVal: oldVal,
-	                newVal: newVal,
-	                display: '+ ' + k + '=' + newVal
-	            });
-	        }
-	    });
-	    return tagDiff;
-	}
-
-
-	function utilEntitySelector(ids) {
-	    return ids.length ? '.' + ids.join(',.') : 'nothing';
-	}
-
-
-	// returns an selector to select entity ids for:
-	//  - entityIDs passed in
-	//  - shallow descendant entityIDs for any of those entities that are relations
-	function utilEntityOrMemberSelector(ids, graph) {
-	    var seen = new Set(ids);
-	    ids.forEach(collectShallowDescendants);
-	    return utilEntitySelector(Array.from(seen));
-
-	    function collectShallowDescendants(id) {
-	        var entity = graph.hasEntity(id);
-	        if (!entity || entity.type !== 'relation') { return; }
-
-	        entity.members
-	            .map(function(member) { return member.id; })
-	            .forEach(function(id) { seen.add(id); });
-	    }
-	}
-
-
-	// returns an selector to select entity ids for:
-	//  - entityIDs passed in
-	//  - deep descendant entityIDs for any of those entities that are relations
-	function utilEntityOrDeepMemberSelector(ids, graph) {
-	    return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
-	}
-
-
-	// returns an selector to select entity ids for:
-	//  - entityIDs passed in
-	//  - deep descendant entityIDs for any of those entities that are relations
-	function utilEntityAndDeepMemberIDs(ids, graph) {
-	    var seen = new Set();
-	    ids.forEach(collectDeepDescendants);
-	    return Array.from(seen);
-
-	    function collectDeepDescendants(id) {
-	        if (seen.has(id)) { return; }
-	        seen.add(id);
-
-	        var entity = graph.hasEntity(id);
-	        if (!entity || entity.type !== 'relation') { return; }
-
-	        entity.members
-	            .map(function(member) { return member.id; })
-	            .forEach(collectDeepDescendants);   // recurse
-	    }
-	}
-
-	// returns an selector to select entity ids for:
-	//  - deep descendant entityIDs for any of those entities that are relations
-	function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
-	    var idsSet = new Set(ids);
-	    var seen = new Set();
-	    var returners = new Set();
-	    ids.forEach(collectDeepDescendants);
-	    return utilEntitySelector(Array.from(returners));
-
-	    function collectDeepDescendants(id) {
-	        if (seen.has(id)) { return; }
-	        seen.add(id);
-
-	        if (!idsSet.has(id)) {
-	            returners.add(id);
-	        }
-
-	        var entity = graph.hasEntity(id);
-	        if (!entity || entity.type !== 'relation') { return; }
-	        if (skipMultipolgonMembers && entity.isMultipolygon()) { return; }
-	        entity.members
-	            .map(function(member) { return member.id; })
-	            .forEach(collectDeepDescendants);   // recurse
-	    }
-	}
-
-
-	// Adds or removes highlight styling for the specified entities
-	function utilHighlightEntities(ids, highlighted, context) {
-	    context.surface()
-	        .selectAll(utilEntityOrDeepMemberSelector(ids, context.graph()))
-	        .classed('highlighted', highlighted);
-	}
-
-
-	// returns an Array that is the union of:
-	//  - nodes for any nodeIDs passed in
-	//  - child nodes of any wayIDs passed in
-	//  - descendant member and child nodes of relationIDs passed in
-	function utilGetAllNodes(ids, graph) {
-	    var seen = new Set();
-	    var nodes = new Set();
-
-	    ids.forEach(collectNodes);
-	    return Array.from(nodes);
-
-	    function collectNodes(id) {
-	        if (seen.has(id)) { return; }
-	        seen.add(id);
-
-	        var entity = graph.hasEntity(id);
-	        if (!entity) { return; }
-
-	        if (entity.type === 'node') {
-	            nodes.add(entity);
-	        } else if (entity.type === 'way') {
-	            entity.nodes.forEach(collectNodes);
-	        } else {
-	            entity.members
-	                .map(function(member) { return member.id; })
-	                .forEach(collectNodes);   // recurse
-	        }
-	    }
-	}
-
-
-	function utilDisplayName(entity) {
-	    var localizedNameKey = 'name:' + _mainLocalizer.languageCode().toLowerCase();
-	    var name = entity.tags[localizedNameKey] || entity.tags.name || '';
-	    var network = entity.tags.cycle_network || entity.tags.network;
-
-	    if (!name && entity.tags.ref) {
-	        name = entity.tags.ref;
-	        if (network) {
-	            name = network + ' ' + name;
-	        }
-	    }
-
-	    return name;
-	}
-
-
-	function utilDisplayNameForPath(entity) {
-	    var name = utilDisplayName(entity);
-	    var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
-
-	    if (!isFirefox && name && rtlRegex.test(name)) {
-	        name = fixRTLTextForSvg(name);
-	    }
-
-	    return name;
-	}
-
-
-	function utilDisplayType(id) {
-	    return {
-	        n: _t('inspector.node'),
-	        w: _t('inspector.way'),
-	        r: _t('inspector.relation')
-	    }[id.charAt(0)];
-	}
-
-
-	function utilDisplayLabel(entity, graph) {
-	    var displayName = utilDisplayName(entity);
-	    if (displayName) {
-	        // use the display name if there is one
-	        return displayName;
-	    }
-	    var preset = _mainPresetIndex.match(entity, graph);
-	    if (preset && preset.name()) {
-	        // use the preset name if there is a match
-	        return preset.name();
-	    }
-	    // fallback to the display type (node/way/relation)
-	    return utilDisplayType(entity.id);
-	}
-
-
-	function utilEntityRoot(entityType) {
-	    return {
-	        node: 'n',
-	        way: 'w',
-	        relation: 'r'
-	    }[entityType];
-	}
-
-
-	// Returns a single object containing the tags of all the given entities.
-	// Example:
-	// {
-	//   highway: 'service',
-	//   service: 'parking_aisle'
-	// }
-	//           +
-	// {
-	//   highway: 'service',
-	//   service: 'driveway',
-	//   width: '3'
-	// }
-	//           =
-	// {
-	//   highway: 'service',
-	//   service: [ 'driveway', 'parking_aisle' ],
-	//   width: [ '3', undefined ]
-	// }
-	function utilCombinedTags(entityIDs, graph) {
-
-	    var tags = {};
-	    var tagCounts = {};
-	    var allKeys = new Set();
-
-	    var entities = entityIDs.map(function(entityID) {
-	        return graph.hasEntity(entityID);
-	    }).filter(Boolean);
-
-	    // gather the aggregate keys
-	    entities.forEach(function(entity) {
-	        var keys = Object.keys(entity.tags).filter(Boolean);
-	        keys.forEach(function(key) {
-	            allKeys.add(key);
-	        });
-	    });
-
-	    entities.forEach(function(entity) {
-
-	        allKeys.forEach(function(key) {
-
-	            var value = entity.tags[key]; // purposely allow `undefined`
-
-	            if (!tags.hasOwnProperty(key)) {
-	                // first value, set as raw
-	                tags[key] = value;
-	            } else {
-	                if (!Array.isArray(tags[key])) {
-	                    if (tags[key] !== value) {
-	                        // first alternate value, replace single value with array
-	                        tags[key] = [tags[key], value];
-	                    }
-	                } else { // type is array
-	                    if (tags[key].indexOf(value) === -1) {
-	                        // subsequent alternate value, add to array
-	                        tags[key].push(value);
-	                    }
-	                }
-	            }
-
-	            var tagHash = key + '=' + value;
-	            if (!tagCounts[tagHash]) { tagCounts[tagHash] = 0; }
-	            tagCounts[tagHash] += 1;
-	        });
-	    });
-
-	    for (var key in tags) {
-	        if (!Array.isArray(tags[key])) { continue; }
-
-	        // sort values by frequency then alphabetically
-	        tags[key] = tags[key].sort(function(val1, val2) {
-	            var key = key; // capture
-	            var count2 = tagCounts[key + '=' + val2];
-	            var count1 = tagCounts[key + '=' + val1];
-	            if (count2 !== count1) {
-	                return count2 - count1;
-	            }
-	            if (val2 && val1) {
-	                return val1.localeCompare(val2);
-	            }
-	            return val1 ? 1 : -1;
-	        });
-	    }
-
-	    return tags;
-	}
-
-
-	function utilStringQs(str) {
-	    var i = 0;  // advance past any leading '?' or '#' characters
-	    while (i < str.length && (str[i] === '?' || str[i] === '#')) { i++; }
-	    str = str.slice(i);
-
-	    return str.split('&').reduce(function(obj, pair){
-	        var parts = pair.split('=');
-	        if (parts.length === 2) {
-	            obj[parts[0]] = (null === parts[1]) ? '' : decodeURIComponent(parts[1]);
-	        }
-	        return obj;
-	    }, {});
-	}
-
-
-	function utilQsString(obj, noencode) {
-	    // encode everything except special characters used in certain hash parameters:
-	    // "/" in map states, ":", ",", {" and "}" in background
-	    function softEncode(s) {
-	        return encodeURIComponent(s).replace(/(%2F|%3A|%2C|%7B|%7D)/g, decodeURIComponent);
-	    }
-
-	    return Object.keys(obj).sort().map(function(key) {
-	        return encodeURIComponent(key) + '=' + (
-	            noencode ? softEncode(obj[key]) : encodeURIComponent(obj[key]));
-	    }).join('&');
-	}
-
-
-	function utilPrefixDOMProperty(property) {
-	    var prefixes = ['webkit', 'ms', 'moz', 'o'];
-	    var i = -1;
-	    var n = prefixes.length;
-	    var s = document.body;
-
-	    if (property in s)
-	        { return property; }
-
-	    property = property.substr(0, 1).toUpperCase() + property.substr(1);
-
-	    while (++i < n) {
-	        if (prefixes[i] + property in s) {
-	            return prefixes[i] + property;
-	        }
-	    }
-
-	    return false;
-	}
-
-
-	function utilPrefixCSSProperty(property) {
-	    var prefixes = ['webkit', 'ms', 'Moz', 'O'];
-	    var i = -1;
-	    var n = prefixes.length;
-	    var s = document.body.style;
-
-	    if (property.toLowerCase() in s) {
-	        return property.toLowerCase();
-	    }
-
-	    while (++i < n) {
-	        if (prefixes[i] + property in s) {
-	            return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
-	        }
-	    }
-
-	    return false;
-	}
-
-
-	var transformProperty;
-	function utilSetTransform(el, x, y, scale) {
-	    var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
-	    var translate = utilDetect().opera ? 'translate('   + x + 'px,' + y + 'px)'
-	        : 'translate3d(' + x + 'px,' + y + 'px,0)';
-	    return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
-	}
-
-
-	// Calculates Levenshtein distance between two strings
-	// see:  https://en.wikipedia.org/wiki/Levenshtein_distance
-	// first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.
-	function utilEditDistance(a, b) {
-	    a = remove$1(a.toLowerCase());
-	    b = remove$1(b.toLowerCase());
-	    if (a.length === 0) { return b.length; }
-	    if (b.length === 0) { return a.length; }
-	    var matrix = [];
-	    for (var i = 0; i <= b.length; i++) { matrix[i] = [i]; }
-	    for (var j = 0; j <= a.length; j++) { matrix[0][j] = j; }
-	    for (i = 1; i <= b.length; i++) {
-	        for (j = 1; j <= a.length; j++) {
-	            if (b.charAt(i-1) === a.charAt(j-1)) {
-	                matrix[i][j] = matrix[i-1][j-1];
-	            } else {
-	                matrix[i][j] = Math.min(matrix[i-1][j-1] + 1, // substitution
-	                    Math.min(matrix[i][j-1] + 1, // insertion
-	                    matrix[i-1][j] + 1)); // deletion
-	            }
-	        }
-	    }
-	    return matrix[b.length][a.length];
-	}
-
-
-	// a d3.mouse-alike which
-	// 1. Only works on HTML elements, not SVG
-	// 2. Does not cause style recalculation
-	function utilFastMouse(container) {
-	    var rect = container.getBoundingClientRect();
-	    var rectLeft = rect.left;
-	    var rectTop = rect.top;
-	    var clientLeft = +container.clientLeft;
-	    var clientTop = +container.clientTop;
-	    return function(e) {
-	        return [
-	            e.clientX - rectLeft - clientLeft,
-	            e.clientY - rectTop - clientTop];
-	    };
-	}
-
-
-	function utilAsyncMap(inputs, func, callback) {
-	    var remaining = inputs.length;
-	    var results = [];
-	    var errors = [];
-
-	    inputs.forEach(function(d, i) {
-	        func(d, function done(err, data) {
-	            errors[i] = err;
-	            results[i] = data;
-	            remaining--;
-	            if (!remaining) { callback(errors, results); }
-	        });
-	    });
-	}
-
-
-	// wraps an index to an interval [0..length-1]
-	function utilWrap(index, length) {
-	    if (index < 0) {
-	        index += Math.ceil(-index/length)*length;
-	    }
-	    return index % length;
-	}
-
-
-	/**
-	 * a replacement for functor
-	 *
-	 * @param {*} value any value
-	 * @returns {Function} a function that returns that value or the value if it's a function
-	 */
-	function utilFunctor(value) {
-	    if (typeof value === 'function') { return value; }
-	    return function() {
-	        return value;
-	    };
-	}
-
-
-	function utilNoAuto(selection) {
-	    var isText = (selection.size() && selection.node().tagName.toLowerCase() === 'textarea');
-
-	    return selection
-	        // assign 'new-password' even for non-password fields to prevent browsers (Chrome) ignoring 'off'
-	        .attr('autocomplete', 'new-password')
-	        .attr('autocorrect', 'off')
-	        .attr('autocapitalize', 'off')
-	        .attr('spellcheck', isText ? 'true' : 'false');
-	}
-
-
-	// https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
-	// https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
-	function utilHashcode(str) {
-	    var hash = 0;
-	    if (str.length === 0) {
-	        return hash;
-	    }
-	    for (var i = 0; i < str.length; i++) {
-	        var char = str.charCodeAt(i);
-	        hash = ((hash << 5) - hash) + char;
-	        hash = hash & hash; // Convert to 32bit integer
-	    }
-	    return hash;
-	}
-
-	// Returns version of `str` with all runs of special characters replaced by `_`;
-	// suitable for HTML ids, classes, selectors, etc.
-	function utilSafeClassName(str) {
-	    return str.toLowerCase().replace(/[^a-z0-9]+/g, '_');
-	}
-
-	// Returns string based on `val` that is highly unlikely to collide with an id
-	// used previously or that's present elsewhere in the document. Useful for preventing
-	// browser-provided autofills or when embedding iD on pages with unknown elements.
-	function utilUniqueDomId(val) {
-	    return 'ideditor-' + utilSafeClassName(val.toString()) + '-' + new Date().getTime().toString();
-	}
-
-	// Returns the length of `str` in unicode characters. This can be less than
-	// `String.length()` since a single unicode character can be composed of multiple
-	// JavaScript UTF-16 code units.
-	function utilUnicodeCharsCount(str) {
-	    // Native ES2015 implementations of `Array.from` split strings into unicode characters
-	    return Array.from(str).length;
-	}
-
-	// Returns a new string representing `str` cut from its start to `limit` length
-	// in unicode characters. Note that this runs the risk of splitting graphemes.
-	function utilUnicodeCharsTruncated(str, limit) {
-	    return Array.from(str).slice(0, limit).join('');
-	}
-
-	function osmEntity(attrs) {
-	    // For prototypal inheritance.
-	    if (this instanceof osmEntity) { return; }
-
-	    // Create the appropriate subtype.
-	    if (attrs && attrs.type) {
-	        return osmEntity[attrs.type].apply(this, arguments);
-	    } else if (attrs && attrs.id) {
-	        return osmEntity[osmEntity.id.type(attrs.id)].apply(this, arguments);
-	    }
-
-	    // Initialize a generic Entity (used only in tests).
-	    return (new osmEntity()).initialize(arguments);
-	}
-
-
-	osmEntity.id = function(type) {
-	    return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
-	};
-
-
-	osmEntity.id.next = {
-	    changeset: -1, node: -1, way: -1, relation: -1
-	};
-
-
-	osmEntity.id.fromOSM = function(type, id) {
-	    return type[0] + id;
-	};
-
-
-	osmEntity.id.toOSM = function(id) {
-	    return id.slice(1);
-	};
-
-
-	osmEntity.id.type = function(id) {
-	    return { 'c': 'changeset', 'n': 'node', 'w': 'way', 'r': 'relation' }[id[0]];
-	};
-
-
-	// A function suitable for use as the second argument to d3.selection#data().
-	osmEntity.key = function(entity) {
-	    return entity.id + 'v' + (entity.v || 0);
-	};
-
-	var _deprecatedTagValuesByKey;
-
-	osmEntity.deprecatedTagValuesByKey = function(dataDeprecated) {
-	    if (!_deprecatedTagValuesByKey) {
-	        _deprecatedTagValuesByKey = {};
-	        dataDeprecated.forEach(function(d) {
-	            var oldKeys = Object.keys(d.old);
-	            if (oldKeys.length === 1) {
-	                var oldKey = oldKeys[0];
-	                var oldValue = d.old[oldKey];
-	                if (oldValue !== '*') {
-	                    if (!_deprecatedTagValuesByKey[oldKey]) {
-	                        _deprecatedTagValuesByKey[oldKey] = [oldValue];
-	                    } else {
-	                        _deprecatedTagValuesByKey[oldKey].push(oldValue);
-	                    }
-	                }
-	            }
-	        });
-	    }
-	    return _deprecatedTagValuesByKey;
-	};
-
-
-	osmEntity.prototype = {
-
-	    tags: {},
-
-
-	    initialize: function(sources) {
-	        for (var i = 0; i < sources.length; ++i) {
-	            var source = sources[i];
-	            for (var prop in source) {
-	                if (Object.prototype.hasOwnProperty.call(source, prop)) {
-	                    if (source[prop] === undefined) {
-	                        delete this[prop];
-	                    } else {
-	                        this[prop] = source[prop];
-	                    }
-	                }
-	            }
-	        }
-
-	        if (!this.id && this.type) {
-	            this.id = osmEntity.id(this.type);
-	        }
-	        if (!this.hasOwnProperty('visible')) {
-	            this.visible = true;
-	        }
-
-	        return this;
-	    },
-
-
-	    copy: function(resolver, copies) {
-	        if (copies[this.id])
-	            { return copies[this.id]; }
-
-	        var copy = osmEntity(this, { id: undefined, user: undefined, version: undefined });
-	        copies[this.id] = copy;
-
-	        return copy;
-	    },
-
-
-	    osmId: function() {
-	        return osmEntity.id.toOSM(this.id);
-	    },
-
-
-	    isNew: function() {
-	        return this.osmId() < 0;
-	    },
-
-
-	    update: function(attrs) {
-	        return osmEntity(this, attrs, { v: 1 + (this.v || 0) });
-	    },
-
-
-	    mergeTags: function(tags) {
-	        var merged = Object.assign({}, this.tags);   // shallow copy
-	        var changed = false;
-	        for (var k in tags) {
-	            var t1 = merged[k];
-	            var t2 = tags[k];
-	            if (!t1) {
-	                changed = true;
-	                merged[k] = t2;
-	            } else if (t1 !== t2) {
-	                changed = true;
-	                merged[k] = utilUnicodeCharsTruncated(
-	                    utilArrayUnion(t1.split(/;\s*/), t2.split(/;\s*/)).join(';'),
-	                    255 // avoid exceeding character limit; see also services/osm.js -> maxCharsForTagValue()
-	                );
-	            }
-	        }
-	        return changed ? this.update({ tags: merged }) : this;
-	    },
-
-
-	    intersects: function(extent, resolver) {
-	        return this.extent(resolver).intersects(extent);
-	    },
-
-
-	    hasNonGeometryTags: function() {
-	        return Object.keys(this.tags).some(function(k) { return k !== 'area'; });
-	    },
-
-	    hasParentRelations: function(resolver) {
-	        return resolver.parentRelations(this).length > 0;
-	    },
-
-	    hasInterestingTags: function() {
-	        return Object.keys(this.tags).some(osmIsInterestingTag);
-	    },
-
-	    hasWikidata: function() {
-	        return !!this.tags.wikidata || !!this.tags['brand:wikidata'];
-	    },
-
-	    isHighwayIntersection: function() {
-	        return false;
-	    },
-
-	    isDegenerate: function() {
-	        return true;
-	    },
-
-	    deprecatedTags: function(dataDeprecated) {
-	        var tags = this.tags;
-
-	        // if there are no tags, none can be deprecated
-	        if (Object.keys(tags).length === 0) { return []; }
-
-	        var deprecated = [];
-	        dataDeprecated.forEach(function(d) {
-	            var oldKeys = Object.keys(d.old);
-	            var matchesDeprecatedTags = oldKeys.every(function(oldKey) {
-	                if (!tags[oldKey]) { return false; }
-	                if (d.old[oldKey] === '*') { return true; }
-
-	                var vals = tags[oldKey].split(';').filter(Boolean);
-	                if (vals.length === 0) {
-	                    return false;
-	                } else if (vals.length > 1) {
-	                    return vals.indexOf(d.old[oldKey]) !== -1;
-	                } else {
-	                    if (tags[oldKey] === d.old[oldKey]) {
-	                        if (d.replace && d.old[oldKey] === d.replace[oldKey]) {
-	                            var replaceKeys = Object.keys(d.replace);
-	                            return !replaceKeys.every(function(replaceKey) {
-	                                return tags[replaceKey] === d.replace[replaceKey];
-	                            });
-	                        } else {
-	                            return true;
-	                        }
-	                    }
-	                }
-	                return false;
-	            });
-	            if (matchesDeprecatedTags) {
-	                deprecated.push(d);
-	            }
-	        });
-
-	        return deprecated;
-	    }
-	};
-
-	function osmLanes(entity) {
-	    if (entity.type !== 'way') { return null; }
-	    if (!entity.tags.highway) { return null; }
-
-	    var tags = entity.tags;
-	    var isOneWay = entity.isOneWay();
-	    var laneCount = getLaneCount(tags, isOneWay);
-	    var maxspeed = parseMaxspeed(tags);
-
-	    var laneDirections = parseLaneDirections(tags, isOneWay, laneCount);
-	    var forward = laneDirections.forward;
-	    var backward = laneDirections.backward;
-	    var bothways = laneDirections.bothways;
-
-	    // parse the piped string 'x|y|z' format
-	    var turnLanes = {};
-	    turnLanes.unspecified = parseTurnLanes(tags['turn:lanes']);
-	    turnLanes.forward = parseTurnLanes(tags['turn:lanes:forward']);
-	    turnLanes.backward = parseTurnLanes(tags['turn:lanes:backward']);
-
-	    var maxspeedLanes = {};
-	    maxspeedLanes.unspecified = parseMaxspeedLanes(tags['maxspeed:lanes'], maxspeed);
-	    maxspeedLanes.forward = parseMaxspeedLanes(tags['maxspeed:lanes:forward'], maxspeed);
-	    maxspeedLanes.backward = parseMaxspeedLanes(tags['maxspeed:lanes:backward'], maxspeed);
-
-	    var psvLanes = {};
-	    psvLanes.unspecified = parseMiscLanes(tags['psv:lanes']);
-	    psvLanes.forward = parseMiscLanes(tags['psv:lanes:forward']);
-	    psvLanes.backward = parseMiscLanes(tags['psv:lanes:backward']);
-
-	    var busLanes = {};
-	    busLanes.unspecified = parseMiscLanes(tags['bus:lanes']);
-	    busLanes.forward = parseMiscLanes(tags['bus:lanes:forward']);
-	    busLanes.backward = parseMiscLanes(tags['bus:lanes:backward']);
-
-	    var taxiLanes = {};
-	    taxiLanes.unspecified = parseMiscLanes(tags['taxi:lanes']);
-	    taxiLanes.forward = parseMiscLanes(tags['taxi:lanes:forward']);
-	    taxiLanes.backward = parseMiscLanes(tags['taxi:lanes:backward']);
-
-	    var hovLanes = {};
-	    hovLanes.unspecified = parseMiscLanes(tags['hov:lanes']);
-	    hovLanes.forward = parseMiscLanes(tags['hov:lanes:forward']);
-	    hovLanes.backward = parseMiscLanes(tags['hov:lanes:backward']);
-
-	    var hgvLanes = {};
-	    hgvLanes.unspecified = parseMiscLanes(tags['hgv:lanes']);
-	    hgvLanes.forward = parseMiscLanes(tags['hgv:lanes:forward']);
-	    hgvLanes.backward = parseMiscLanes(tags['hgv:lanes:backward']);
-
-	    var bicyclewayLanes = {};
-	    bicyclewayLanes.unspecified = parseBicycleWay(tags['bicycleway:lanes']);
-	    bicyclewayLanes.forward = parseBicycleWay(tags['bicycleway:lanes:forward']);
-	    bicyclewayLanes.backward = parseBicycleWay(tags['bicycleway:lanes:backward']);
-
-	    var lanesObj = {
-	        forward: [],
-	        backward: [],
-	        unspecified: []
-	    };
-
-	    // map forward/backward/unspecified of each lane type to lanesObj
-	    mapToLanesObj(lanesObj, turnLanes, 'turnLane');
-	    mapToLanesObj(lanesObj, maxspeedLanes, 'maxspeed');
-	    mapToLanesObj(lanesObj, psvLanes, 'psv');
-	    mapToLanesObj(lanesObj, busLanes, 'bus');
-	    mapToLanesObj(lanesObj, taxiLanes, 'taxi');
-	    mapToLanesObj(lanesObj, hovLanes, 'hov');
-	    mapToLanesObj(lanesObj, hgvLanes, 'hgv');
-	    mapToLanesObj(lanesObj, bicyclewayLanes, 'bicycleway');
-
-	    return {
-	        metadata: {
-	            count: laneCount,
-	            oneway: isOneWay,
-	            forward: forward,
-	            backward: backward,
-	            bothways: bothways,
-	            turnLanes: turnLanes,
-	            maxspeed: maxspeed,
-	            maxspeedLanes: maxspeedLanes,
-	            psvLanes: psvLanes,
-	            busLanes: busLanes,
-	            taxiLanes: taxiLanes,
-	            hovLanes: hovLanes,
-	            hgvLanes: hgvLanes,
-	            bicyclewayLanes: bicyclewayLanes
-	        },
-	        lanes: lanesObj
-	    };
-	}
-
-
-	function getLaneCount(tags, isOneWay) {
-	    var count;
-	    if (tags.lanes) {
-	        count = parseInt(tags.lanes, 10);
-	        if (count > 0) {
-	            return count;
-	        }
-	    }
-
-
-	    switch (tags.highway) {
-	        case 'trunk':
-	        case 'motorway':
-	            count = isOneWay ? 2 : 4;
-	            break;
-	        default:
-	            count = isOneWay ? 1 : 2;
-	            break;
-	    }
-
-	    return count;
-	}
-
-
-	function parseMaxspeed(tags) {
-	    var maxspeed = tags.maxspeed;
-	    if (!maxspeed) { return; }
-
-	    var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
-	    if (!maxspeedRegex.test(maxspeed)) { return; }
-
-	    return parseInt(maxspeed, 10);
-	}
-
-
-	function parseLaneDirections(tags, isOneWay, laneCount) {
-	    var forward = parseInt(tags['lanes:forward'], 10);
-	    var backward = parseInt(tags['lanes:backward'], 10);
-	    var bothways = parseInt(tags['lanes:both_ways'], 10) > 0 ? 1 : 0;
-
-	    if (parseInt(tags.oneway, 10) === -1) {
-	        forward = 0;
-	        bothways = 0;
-	        backward = laneCount;
-	    }
-	    else if (isOneWay) {
-	        forward = laneCount;
-	        bothways = 0;
-	        backward = 0;
-	    }
-	    else if (isNaN(forward) && isNaN(backward)) {
-	        backward = Math.floor((laneCount - bothways) / 2);
-	        forward = laneCount - bothways - backward;
-	    }
-	    else if (isNaN(forward)) {
-	        if (backward > laneCount - bothways) {
-	            backward = laneCount - bothways;
-	        }
-	        forward = laneCount - bothways - backward;
-	    }
-	    else if (isNaN(backward)) {
-	        if (forward > laneCount - bothways) {
-	            forward = laneCount - bothways;
-	        }
-	        backward = laneCount - bothways - forward;
-	    }
-	    return {
-	        forward: forward,
-	        backward: backward,
-	        bothways: bothways
-	    };
-	}
-
-
-	function parseTurnLanes(tag){
-	    if (!tag) { return; }
-
-	    var validValues = [
-	        'left', 'slight_left', 'sharp_left', 'through', 'right', 'slight_right',
-	        'sharp_right', 'reverse', 'merge_to_left', 'merge_to_right', 'none'
-	    ];
-
-	    return tag.split('|')
-	        .map(function (s) {
-	            if (s === '') { s = 'none'; }
-	            return s.split(';')
-	                .map(function (d) {
-	                    return validValues.indexOf(d) === -1 ? 'unknown': d;
-	                });
-	        });
-	}
-
-
-	function parseMaxspeedLanes(tag, maxspeed) {
-	    if (!tag) { return; }
-
-	    return tag.split('|')
-	        .map(function (s) {
-	            if (s === 'none') { return s; }
-	            var m = parseInt(s, 10);
-	            if (s === '' || m === maxspeed) { return null; }
-	            return isNaN(m) ? 'unknown': m;
-	        });
-	}
-
-
-	function parseMiscLanes(tag) {
-	    if (!tag) { return; }
-
-	    var validValues = [
-	        'yes', 'no', 'designated'
-	    ];
-
-	    return tag.split('|')
-	        .map(function (s) {
-	            if (s === '') { s = 'no'; }
-	            return validValues.indexOf(s) === -1 ? 'unknown': s;
-	        });
-	}
-
-
-	function parseBicycleWay(tag) {
-	    if (!tag) { return; }
-
-	    var validValues = [
-	        'yes', 'no', 'designated', 'lane'
-	    ];
-
-	    return tag.split('|')
-	        .map(function (s) {
-	            if (s === '') { s = 'no'; }
-	            return validValues.indexOf(s) === -1 ? 'unknown': s;
-	        });
-	}
-
-
-	function mapToLanesObj(lanesObj, data, key) {
-	    if (data.forward) { data.forward.forEach(function(l, i) {
-	        if (!lanesObj.forward[i]) { lanesObj.forward[i] = {}; }
-	        lanesObj.forward[i][key] = l;
-	    }); }
-	    if (data.backward) { data.backward.forEach(function(l, i) {
-	        if (!lanesObj.backward[i]) { lanesObj.backward[i] = {}; }
-	        lanesObj.backward[i][key] = l;
-	    }); }
-	    if (data.unspecified) { data.unspecified.forEach(function(l, i) {
-	        if (!lanesObj.unspecified[i]) { lanesObj.unspecified[i] = {}; }
-	        lanesObj.unspecified[i][key] = l;
-	    }); }
-	}
-
-	function osmWay() {
-	    if (!(this instanceof osmWay)) {
-	        return (new osmWay()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
-	    }
-	}
-
-
-	osmEntity.way = osmWay;
-
-	osmWay.prototype = Object.create(osmEntity.prototype);
-
-
-	Object.assign(osmWay.prototype, {
-	    type: 'way',
-	    nodes: [],
-
-
-	    copy: function(resolver, copies) {
-	        if (copies[this.id]) { return copies[this.id]; }
-
-	        var copy = osmEntity.prototype.copy.call(this, resolver, copies);
-
-	        var nodes = this.nodes.map(function(id) {
-	            return resolver.entity(id).copy(resolver, copies).id;
-	        });
-
-	        copy = copy.update({ nodes: nodes });
-	        copies[this.id] = copy;
-
-	        return copy;
-	    },
-
-
-	    extent: function(resolver) {
-	        return resolver.transient(this, 'extent', function() {
-	            var extent = geoExtent();
-	            for (var i = 0; i < this.nodes.length; i++) {
-	                var node = resolver.hasEntity(this.nodes[i]);
-	                if (node) {
-	                    extent._extend(node.extent());
-	                }
-	            }
-	            return extent;
-	        });
-	    },
-
-
-	    first: function() {
-	        return this.nodes[0];
-	    },
-
-
-	    last: function() {
-	        return this.nodes[this.nodes.length - 1];
-	    },
-
-
-	    contains: function(node) {
-	        return this.nodes.indexOf(node) >= 0;
-	    },
-
-
-	    affix: function(node) {
-	        if (this.nodes[0] === node) { return 'prefix'; }
-	        if (this.nodes[this.nodes.length - 1] === node) { return 'suffix'; }
-	    },
-
-
-	    layer: function() {
-	        // explicit layer tag, clamp between -10, 10..
-	        if (isFinite(this.tags.layer)) {
-	            return Math.max(-10, Math.min(+(this.tags.layer), 10));
-	        }
-
-	        // implied layer tag..
-	        if (this.tags.covered === 'yes') { return -1; }
-	        if (this.tags.location === 'overground') { return 1; }
-	        if (this.tags.location === 'underground') { return -1; }
-	        if (this.tags.location === 'underwater') { return -10; }
-
-	        if (this.tags.power === 'line') { return 10; }
-	        if (this.tags.power === 'minor_line') { return 10; }
-	        if (this.tags.aerialway) { return 10; }
-	        if (this.tags.bridge) { return 1; }
-	        if (this.tags.cutting) { return -1; }
-	        if (this.tags.tunnel) { return -1; }
-	        if (this.tags.waterway) { return -1; }
-	        if (this.tags.man_made === 'pipeline') { return -10; }
-	        if (this.tags.boundary) { return -10; }
-	        return 0;
-	    },
-
-
-	    // the approximate width of the line based on its tags except its `width` tag
-	    impliedLineWidthMeters: function() {
-	        var averageWidths = {
-	            highway: { // width is for single lane
-	                motorway: 5, motorway_link: 5, trunk: 4.5, trunk_link: 4.5,
-	                primary: 4, secondary: 4, tertiary: 4,
-	                primary_link: 4, secondary_link: 4, tertiary_link: 4,
-	                unclassified: 4, road: 4, living_street: 4, bus_guideway: 4, pedestrian: 4,
-	                residential: 3.5, service: 3.5, track: 3, cycleway: 2.5,
-	                bridleway: 2, corridor: 2, steps: 2, path: 1.5, footway: 1.5
-	            },
-	            railway: { // width includes ties and rail bed, not just track gauge
-	                rail: 2.5, light_rail: 2.5, tram: 2.5, subway: 2.5,
-	                monorail: 2.5, funicular: 2.5, disused: 2.5, preserved: 2.5,
-	                miniature: 1.5, narrow_gauge: 1.5
-	            },
-	            waterway: {
-	                river: 50, canal: 25, stream: 5, tidal_channel: 5, fish_pass: 2.5, drain: 2.5, ditch: 1.5
-	            }
-	        };
-	        for (var key in averageWidths) {
-	            if (this.tags[key] && averageWidths[key][this.tags[key]]) {
-	                var width = averageWidths[key][this.tags[key]];
-	                if (key === 'highway') {
-	                    var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
-	                    if (!laneCount) { laneCount = this.isOneWay() ? 1 : 2; }
-
-	                    return width * laneCount;
-	                }
-	                return width;
-	            }
-	        }
-	        return null;
-	    },
-
-
-	    isOneWay: function() {
-	        // explicit oneway tag..
-	        var values = {
-	            'yes': true,
-	            '1': true,
-	            '-1': true,
-	            'reversible': true,
-	            'alternating': true,
-	            'no': false,
-	            '0': false
-	        };
-	        if (values[this.tags.oneway] !== undefined) {
-	            return values[this.tags.oneway];
-	        }
-
-	        // implied oneway tag..
-	        for (var key in this.tags) {
-	            if (key in osmOneWayTags && (this.tags[key] in osmOneWayTags[key]))
-	                { return true; }
-	        }
-	        return false;
-	    },
-
-	    // Some identifier for tag that implies that this way is "sided",
-	    // i.e. the right side is the 'inside' (e.g. the right side of a
-	    // natural=cliff is lower).
-	    sidednessIdentifier: function() {
-	        for (var key in this.tags) {
-	            var value = this.tags[key];
-	            if (key in osmRightSideIsInsideTags && (value in osmRightSideIsInsideTags[key])) {
-	                if (osmRightSideIsInsideTags[key][value] === true) {
-	                    return key;
-	                } else {
-	                    // if the map's value is something other than a
-	                    // literal true, we should use it so we can
-	                    // special case some keys (e.g. natural=coastline
-	                    // is handled differently to other naturals).
-	                    return osmRightSideIsInsideTags[key][value];
-	                }
-	            }
-	        }
-
-	        return null;
-	    },
-
-	    isSided: function() {
-	        if (this.tags.two_sided === 'yes') {
-	            return false;
-	        }
-
-	        return this.sidednessIdentifier() !== null;
-	    },
-
-	    lanes: function() {
-	        return osmLanes(this);
-	    },
-
-
-	    isClosed: function() {
-	        return this.nodes.length > 1 && this.first() === this.last();
-	    },
-
-
-	    isConvex: function(resolver) {
-	        if (!this.isClosed() || this.isDegenerate()) { return null; }
-
-	        var nodes = utilArrayUniq(resolver.childNodes(this));
-	        var coords = nodes.map(function(n) { return n.loc; });
-	        var curr = 0;
-	        var prev = 0;
-
-	        for (var i = 0; i < coords.length; i++) {
-	            var o = coords[(i+1) % coords.length];
-	            var a = coords[i];
-	            var b = coords[(i+2) % coords.length];
-	            var res = geoVecCross(a, b, o);
-
-	            curr = (res > 0) ? 1 : (res < 0) ? -1 : 0;
-	            if (curr === 0) {
-	                continue;
-	            } else if (prev && curr !== prev) {
-	                return false;
-	            }
-	            prev = curr;
-	        }
-	        return true;
-	    },
-
-	    // returns an object with the tag that implies this is an area, if any
-	    tagSuggestingArea: function() {
-	        return osmTagSuggestingArea(this.tags);
-	    },
-
-	    isArea: function() {
-	        if (this.tags.area === 'yes')
-	            { return true; }
-	        if (!this.isClosed() || this.tags.area === 'no')
-	            { return false; }
-	        return this.tagSuggestingArea() !== null;
-	    },
-
-
-	    isDegenerate: function() {
-	        return (new Set(this.nodes).size < (this.isArea() ? 3 : 2));
-	    },
-
-
-	    areAdjacent: function(n1, n2) {
-	        for (var i = 0; i < this.nodes.length; i++) {
-	            if (this.nodes[i] === n1) {
-	                if (this.nodes[i - 1] === n2) { return true; }
-	                if (this.nodes[i + 1] === n2) { return true; }
-	            }
-	        }
-	        return false;
-	    },
-
-
-	    geometry: function(graph) {
-	        return graph.transient(this, 'geometry', function() {
-	            return this.isArea() ? 'area' : 'line';
-	        });
-	    },
-
-
-	    // returns an array of objects representing the segments between the nodes in this way
-	    segments: function(graph) {
-
-	        function segmentExtent(graph) {
-	            var n1 = graph.hasEntity(this.nodes[0]);
-	            var n2 = graph.hasEntity(this.nodes[1]);
-	            return n1 && n2 && geoExtent([
-	                [
-	                    Math.min(n1.loc[0], n2.loc[0]),
-	                    Math.min(n1.loc[1], n2.loc[1])
-	                ],
-	                [
-	                    Math.max(n1.loc[0], n2.loc[0]),
-	                    Math.max(n1.loc[1], n2.loc[1])
-	                ]
-	            ]);
-	        }
-
-	        return graph.transient(this, 'segments', function() {
-	            var segments = [];
-	            for (var i = 0; i < this.nodes.length - 1; i++) {
-	                segments.push({
-	                    id: this.id + '-' + i,
-	                    wayId: this.id,
-	                    index: i,
-	                    nodes: [this.nodes[i], this.nodes[i + 1]],
-	                    extent: segmentExtent
-	                });
-	            }
-	            return segments;
-	        });
-	    },
-
-
-	    // If this way is not closed, append the beginning node to the end of the nodelist to close it.
-	    close: function() {
-	        if (this.isClosed() || !this.nodes.length) { return this; }
-
-	        var nodes = this.nodes.slice();
-	        nodes = nodes.filter(noRepeatNodes);
-	        nodes.push(nodes[0]);
-	        return this.update({ nodes: nodes });
-	    },
-
-
-	    // If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
-	    unclose: function() {
-	        if (!this.isClosed()) { return this; }
-
-	        var nodes = this.nodes.slice();
-	        var connector = this.first();
-	        var i = nodes.length - 1;
-
-	        // remove trailing connectors..
-	        while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-	            nodes.splice(i, 1);
-	            i = nodes.length - 1;
-	        }
-
-	        nodes = nodes.filter(noRepeatNodes);
-	        return this.update({ nodes: nodes });
-	    },
-
-
-	    // Adds a node (id) in front of the node which is currently at position index.
-	    // If index is undefined, the node will be added to the end of the way for linear ways,
-	    //   or just before the final connecting node for circular ways.
-	    // Consecutive duplicates are eliminated including existing ones.
-	    // Circularity is always preserved when adding a node.
-	    addNode: function(id, index) {
-	        var nodes = this.nodes.slice();
-	        var isClosed = this.isClosed();
-	        var max = isClosed ? nodes.length - 1 : nodes.length;
-
-	        if (index === undefined) {
-	            index = max;
-	        }
-
-	        if (index < 0 || index > max) {
-	            throw new RangeError('index ' + index + ' out of range 0..' + max);
-	        }
-
-	        // If this is a closed way, remove all connector nodes except the first one
-	        // (there may be duplicates) and adjust index if necessary..
-	        if (isClosed) {
-	            var connector = this.first();
-
-	            // leading connectors..
-	            var i = 1;
-	            while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-	                nodes.splice(i, 1);
-	                if (index > i) { index--; }
-	            }
-
-	            // trailing connectors..
-	            i = nodes.length - 1;
-	            while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-	                nodes.splice(i, 1);
-	                if (index > i) { index--; }
-	                i = nodes.length - 1;
-	            }
-	        }
-
-	        nodes.splice(index, 0, id);
-	        nodes = nodes.filter(noRepeatNodes);
-
-	        // If the way was closed before, append a connector node to keep it closed..
-	        if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	            nodes.push(nodes[0]);
-	        }
-
-	        return this.update({ nodes: nodes });
-	    },
-
-
-	    // Replaces the node which is currently at position index with the given node (id).
-	    // Consecutive duplicates are eliminated including existing ones.
-	    // Circularity is preserved when updating a node.
-	    updateNode: function(id, index) {
-	        var nodes = this.nodes.slice();
-	        var isClosed = this.isClosed();
-	        var max = nodes.length - 1;
-
-	        if (index === undefined || index < 0 || index > max) {
-	            throw new RangeError('index ' + index + ' out of range 0..' + max);
-	        }
-
-	        // If this is a closed way, remove all connector nodes except the first one
-	        // (there may be duplicates) and adjust index if necessary..
-	        if (isClosed) {
-	            var connector = this.first();
-
-	            // leading connectors..
-	            var i = 1;
-	            while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-	                nodes.splice(i, 1);
-	                if (index > i) { index--; }
-	            }
-
-	            // trailing connectors..
-	            i = nodes.length - 1;
-	            while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-	                nodes.splice(i, 1);
-	                if (index === i) { index = 0; }  // update leading connector instead
-	                i = nodes.length - 1;
-	            }
-	        }
-
-	        nodes.splice(index, 1, id);
-	        nodes = nodes.filter(noRepeatNodes);
-
-	        // If the way was closed before, append a connector node to keep it closed..
-	        if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	            nodes.push(nodes[0]);
-	        }
-
-	        return this.update({nodes: nodes});
-	    },
-
-
-	    // Replaces each occurrence of node id needle with replacement.
-	    // Consecutive duplicates are eliminated including existing ones.
-	    // Circularity is preserved.
-	    replaceNode: function(needleID, replacementID) {
-	        var nodes = this.nodes.slice();
-	        var isClosed = this.isClosed();
-
-	        for (var i = 0; i < nodes.length; i++) {
-	            if (nodes[i] === needleID) {
-	                nodes[i] = replacementID;
-	            }
-	        }
-
-	        nodes = nodes.filter(noRepeatNodes);
-
-	        // If the way was closed before, append a connector node to keep it closed..
-	        if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	            nodes.push(nodes[0]);
-	        }
-
-	        return this.update({nodes: nodes});
-	    },
-
-
-	    // Removes each occurrence of node id.
-	    // Consecutive duplicates are eliminated including existing ones.
-	    // Circularity is preserved.
-	    removeNode: function(id) {
-	        var nodes = this.nodes.slice();
-	        var isClosed = this.isClosed();
-
-	        nodes = nodes
-	            .filter(function(node) { return node !== id; })
-	            .filter(noRepeatNodes);
-
-	        // If the way was closed before, append a connector node to keep it closed..
-	        if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-	            nodes.push(nodes[0]);
-	        }
-
-	        return this.update({nodes: nodes});
-	    },
-
-
-	    asJXON: function(changeset_id) {
-	        var r = {
-	            way: {
-	                '@id': this.osmId(),
-	                '@version': this.version || 0,
-	                nd: this.nodes.map(function(id) {
-	                    return { keyAttributes: { ref: osmEntity.id.toOSM(id) } };
-	                }, this),
-	                tag: Object.keys(this.tags).map(function(k) {
-	                    return { keyAttributes: { k: k, v: this.tags[k] } };
-	                }, this)
-	            }
-	        };
-	        if (changeset_id) {
-	            r.way['@changeset'] = changeset_id;
-	        }
-	        return r;
-	    },
-
-
-	    asGeoJSON: function(resolver) {
-	        return resolver.transient(this, 'GeoJSON', function() {
-	            var coordinates = resolver.childNodes(this)
-	                .map(function(n) { return n.loc; });
-
-	            if (this.isArea() && this.isClosed()) {
-	                return {
-	                    type: 'Polygon',
-	                    coordinates: [coordinates]
-	                };
-	            } else {
-	                return {
-	                    type: 'LineString',
-	                    coordinates: coordinates
-	                };
-	            }
-	        });
-	    },
-
-
-	    area: function(resolver) {
-	        return resolver.transient(this, 'area', function() {
-	            var nodes = resolver.childNodes(this);
-
-	            var json = {
-	                type: 'Polygon',
-	                coordinates: [ nodes.map(function(n) { return n.loc; }) ]
-	            };
-
-	            if (!this.isClosed() && nodes.length) {
-	                json.coordinates[0].push(nodes[0].loc);
-	            }
-
-	            var area = d3_geoArea(json);
-
-	            // Heuristic for detecting counterclockwise winding order. Assumes
-	            // that OpenStreetMap polygons are not hemisphere-spanning.
-	            if (area > 2 * Math.PI) {
-	                json.coordinates[0] = json.coordinates[0].reverse();
-	                area = d3_geoArea(json);
-	            }
-
-	            return isNaN(area) ? 0 : area;
-	        });
-	    }
-	});
-
-
-	// Filter function to eliminate consecutive duplicates.
-	function noRepeatNodes(node, i, arr) {
-	    return i === 0 || node !== arr[i - 1];
-	}
-
-	// "Old" multipolyons, previously known as "simple" multipolygons, are as follows:
-	//
-	// 1. Relation tagged with `type=multipolygon` and no interesting tags.
-	// 2. One and only one member with the `outer` role. Must be a way with interesting tags.
-	// 3. No members without a role.
-	//
-	// Old multipolygons are no longer recommended but are still rendered as areas by iD.
-
-	function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
-	    if (entity.type !== 'relation' ||
-	        !entity.isMultipolygon()
-	        || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
-	        return false;
-	    }
-
-	    var outerMember;
-	    for (var memberIndex in entity.members) {
-	        var member = entity.members[memberIndex];
-	        if (!member.role || member.role === 'outer') {
-	            if (outerMember) { return false; }
-	            if (member.type !== 'way') { return false; }
-	            if (!graph.hasEntity(member.id)) { return false; }
-
-	            outerMember = graph.entity(member.id);
-
-	            if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
-	                return false;
-	            }
-	        }
-	    }
-
-	    return outerMember;
-	}
-
-	// For fixing up rendering of multipolygons with tags on the outer member.
-	// https://github.com/openstreetmap/iD/issues/613
-	function osmIsOldMultipolygonOuterMember(entity, graph) {
-	    if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0)
-	        { return false; }
-
-	    var parents = graph.parentRelations(entity);
-	    if (parents.length !== 1)
-	        { return false; }
-
-	    var parent = parents[0];
-	    if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1)
-	        { return false; }
-
-	    var members = parent.members, member;
-	    for (var i = 0; i < members.length; i++) {
-	        member = members[i];
-	        if (member.id === entity.id && member.role && member.role !== 'outer')
-	            { return false; } // Not outer member
-	        if (member.id !== entity.id && (!member.role || member.role === 'outer'))
-	            { return false; } // Not a simple multipolygon
-	    }
-
-	    return parent;
-	}
-
-
-	function osmOldMultipolygonOuterMember(entity, graph) {
-	    if (entity.type !== 'way')
-	        { return false; }
-
-	    var parents = graph.parentRelations(entity);
-	    if (parents.length !== 1)
-	        { return false; }
-
-	    var parent = parents[0];
-	    if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1)
-	        { return false; }
-
-	    var members = parent.members, member, outerMember;
-	    for (var i = 0; i < members.length; i++) {
-	        member = members[i];
-	        if (!member.role || member.role === 'outer') {
-	            if (outerMember)
-	                { return false; } // Not a simple multipolygon
-	            outerMember = member;
-	        }
-	    }
-
-	    if (!outerMember)
-	        { return false; }
-
-	    var outerEntity = graph.hasEntity(outerMember.id);
-	    if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length)
-	        { return false; }
-
-	    return outerEntity;
-	}
-
-
-	// Join `toJoin` array into sequences of connecting ways.
-
-	// Segments which share identical start/end nodes will, as much as possible,
-	// be connected with each other.
-	//
-	// The return value is a nested array. Each constituent array contains elements
-	// of `toJoin` which have been determined to connect.
-	//
-	// Each consitituent array also has a `nodes` property whose value is an
-	// ordered array of member nodes, with appropriate order reversal and
-	// start/end coordinate de-duplication.
-	//
-	// Members of `toJoin` must have, at minimum, `type` and `id` properties.
-	// Thus either an array of `osmWay`s or a relation member array may be used.
-	//
-	// If an member is an `osmWay`, its tags and childnodes may be reversed via
-	// `actionReverse` in the output.
-	//
-	// The returned sequences array also has an `actions` array property, containing
-	// any reversal actions that should be applied to the graph, should the calling
-	// code attempt to actually join the given ways.
-	//
-	// Incomplete members (those for which `graph.hasEntity(element.id)` returns
-	// false) and non-way members are ignored.
-	//
-	function osmJoinWays(toJoin, graph) {
-	    function resolve(member) {
-	        return graph.childNodes(graph.entity(member.id));
-	    }
-
-	    function reverse(item) {
-	        var action = actionReverse(item.id, { reverseOneway: true });
-	        sequences.actions.push(action);
-	        return (item instanceof osmWay) ? action(graph).entity(item.id) : item;
-	    }
-
-	    // make a copy containing only the items to join
-	    toJoin = toJoin.filter(function(member) {
-	        return member.type === 'way' && graph.hasEntity(member.id);
-	    });
-
-	    // Are the things we are joining relation members or `osmWays`?
-	    // If `osmWays`, skip the "prefer a forward path" code below (see #4872)
-	    var i;
-	    var joinAsMembers = true;
-	    for (i = 0; i < toJoin.length; i++) {
-	        if (toJoin[i] instanceof osmWay) {
-	            joinAsMembers = false;
-	            break;
-	        }
-	    }
-
-	    var sequences = [];
-	    sequences.actions = [];
-
-	    while (toJoin.length) {
-	        // start a new sequence
-	        var item = toJoin.shift();
-	        var currWays = [item];
-	        var currNodes = resolve(item).slice();
-	        var doneSequence = false;
-
-	        // add to it
-	        while (toJoin.length && !doneSequence) {
-	            var start = currNodes[0];
-	            var end = currNodes[currNodes.length - 1];
-	            var fn = null;
-	            var nodes = null;
-
-	            // Find the next way/member to join.
-	            for (i = 0; i < toJoin.length; i++) {
-	                item = toJoin[i];
-	                nodes = resolve(item);
-
-	                // (for member ordering only, not way ordering - see #4872)
-	                // Strongly prefer to generate a forward path that preserves the order
-	                // of the members array. For multipolygons and most relations, member
-	                // order does not matter - but for routes, it does. (see #4589)
-	                // If we started this sequence backwards (i.e. next member way attaches to
-	                // the start node and not the end node), reverse the initial way before continuing.
-	                if (joinAsMembers && currWays.length === 1 && nodes[0] !== end && nodes[nodes.length - 1] !== end &&
-	                    (nodes[nodes.length - 1] === start || nodes[0] === start)
-	                ) {
-	                    currWays[0] = reverse(currWays[0]);
-	                    currNodes.reverse();
-	                    start = currNodes[0];
-	                    end = currNodes[currNodes.length - 1];
-	                }
-
-	                if (nodes[0] === end) {
-	                    fn = currNodes.push;               // join to end
-	                    nodes = nodes.slice(1);
-	                    break;
-	                } else if (nodes[nodes.length - 1] === end) {
-	                    fn = currNodes.push;               // join to end
-	                    nodes = nodes.slice(0, -1).reverse();
-	                    item = reverse(item);
-	                    break;
-	                } else if (nodes[nodes.length - 1] === start) {
-	                    fn = currNodes.unshift;            // join to beginning
-	                    nodes = nodes.slice(0, -1);
-	                    break;
-	                } else if (nodes[0] === start) {
-	                    fn = currNodes.unshift;            // join to beginning
-	                    nodes = nodes.slice(1).reverse();
-	                    item = reverse(item);
-	                    break;
-	                } else {
-	                    fn = nodes = null;
-	                }
-	            }
-
-	            if (!nodes) {     // couldn't find a joinable way/member
-	                doneSequence = true;
-	                break;
-	            }
-
-	            fn.apply(currWays, [item]);
-	            fn.apply(currNodes, nodes);
-
-	            toJoin.splice(i, 1);
-	        }
-
-	        currWays.nodes = currNodes;
-	        sequences.push(currWays);
-	    }
-
-	    return sequences;
-	}
-
-	function actionAddMember(relationId, member, memberIndex, insertPair) {
-
-	    return function action(graph) {
-	        var relation = graph.entity(relationId);
-
-	        // There are some special rules for Public Transport v2 routes.
-	        var isPTv2 = /stop|platform/.test(member.role);
-
-	        if ((isNaN(memberIndex) || insertPair) && member.type === 'way' && !isPTv2) {
-	            // Try to perform sensible inserts based on how the ways join together
-	            graph = addWayMember(relation, graph);
-	        } else {
-	            // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
-	            // Stops and Platforms for PTv2 should be ordered first.
-	            // hack: We do not currently have the ability to place them in the exactly correct order.
-	            if (isPTv2 && isNaN(memberIndex)) {
-	                memberIndex = 0;
-	            }
-
-	            graph = graph.replace(relation.addMember(member, memberIndex));
-	        }
-
-	        return graph;
-	    };
-
-
-	    // Add a way member into the relation "wherever it makes sense".
-	    // In this situation we were not supplied a memberIndex.
-	    function addWayMember(relation, graph) {
-	        var groups, tempWay, item, i, j, k;
-
-	        // remove PTv2 stops and platforms before doing anything.
-	        var PTv2members = [];
-	        var members = [];
-	        for (i = 0; i < relation.members.length; i++) {
-	            var m = relation.members[i];
-	            if (/stop|platform/.test(m.role)) {
-	                PTv2members.push(m);
-	            } else {
-	                members.push(m);
-	            }
-	        }
-	        relation = relation.update({ members: members });
-
-
-	        if (insertPair) {
-	            // We're adding a member that must stay paired with an existing member.
-	            // (This feature is used by `actionSplit`)
-	            //
-	            // This is tricky because the members may exist multiple times in the
-	            // member list, and with different A-B/B-A ordering and different roles.
-	            // (e.g. a bus route that loops out and back - #4589).
-	            //
-	            // Replace the existing member with a temporary way,
-	            // so that `osmJoinWays` can treat the pair like a single way.
-	            tempWay = osmWay({ id: 'wTemp', nodes: insertPair.nodes });
-	            graph = graph.replace(tempWay);
-	            var tempMember = { id: tempWay.id, type: 'way', role: member.role };
-	            var tempRelation = relation.replaceMember({id: insertPair.originalID}, tempMember, true);
-	            groups = utilArrayGroupBy(tempRelation.members, 'type');
-	            groups.way = groups.way || [];
-
-	        } else {
-	            // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
-	            groups = utilArrayGroupBy(relation.members, 'type');
-	            groups.way = groups.way || [];
-	            groups.way.push(member);
-	        }
-
-	        members = withIndex(groups.way);
-	        var joined = osmJoinWays(members, graph);
-
-	        // `joined` might not contain all of the way members,
-	        // But will contain only the completed (downloaded) members
-	        for (i = 0; i < joined.length; i++) {
-	            var segment = joined[i];
-	            var nodes = segment.nodes.slice();
-	            var startIndex = segment[0].index;
-
-	            // j = array index in `members` where this segment starts
-	            for (j = 0; j < members.length; j++) {
-	                if (members[j].index === startIndex) {
-	                    break;
-	                }
-	            }
-
-	            // k = each member in segment
-	            for (k = 0; k < segment.length; k++) {
-	                item = segment[k];
-	                var way = graph.entity(item.id);
-
-	                // If this is a paired item, generate members in correct order and role
-	                if (tempWay && item.id === tempWay.id) {
-	                    if (nodes[0].id === insertPair.nodes[0]) {
-	                        item.pair = [
-	                            { id: insertPair.originalID, type: 'way', role: item.role },
-	                            { id: insertPair.insertedID, type: 'way', role: item.role }
-	                        ];
-	                    } else {
-	                        item.pair = [
-	                            { id: insertPair.insertedID, type: 'way', role: item.role },
-	                            { id: insertPair.originalID, type: 'way', role: item.role }
-	                        ];
-	                    }
-	                }
-
-	                // reorder `members` if necessary
-	                if (k > 0) {
-	                    if (j+k >= members.length || item.index !== members[j+k].index) {
-	                        moveMember(members, item.index, j+k);
-	                    }
-	                }
-
-	                nodes.splice(0, way.nodes.length - 1);
-	            }
-	        }
-
-	        if (tempWay) {
-	            graph = graph.remove(tempWay);
-	        }
-
-	        // Final pass: skip dead items, split pairs, remove index properties
-	        var wayMembers = [];
-	        for (i = 0; i < members.length; i++) {
-	            item = members[i];
-	            if (item.index === -1) { continue; }
-
-	            if (item.pair) {
-	                wayMembers.push(item.pair[0]);
-	                wayMembers.push(item.pair[1]);
-	            } else {
-	                wayMembers.push(utilObjectOmit(item, ['index']));
-	            }
-	        }
-
-	        // Put stops and platforms first, then nodes, ways, relations
-	        // This is recommended for Public Transport v2 routes:
-	        // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
-	        var newMembers = PTv2members.concat( (groups.node || []), wayMembers, (groups.relation || []) );
-
-	        return graph.replace(relation.update({ members: newMembers }));
-
-
-	        // `moveMember()` changes the `members` array in place by splicing
-	        // the item with `.index = findIndex` to where it belongs,
-	        // and marking the old position as "dead" with `.index = -1`
-	        //
-	        // j=5, k=0                jk
-	        // segment                 5 4 7 6
-	        // members       0 1 2 3 4 5 6 7 8 9        keep 5 in j+k
-	        //
-	        // j=5, k=1                j k
-	        // segment                 5 4 7 6
-	        // members       0 1 2 3 4 5 6 7 8 9        move 4 to j+k
-	        // members       0 1 2 3 x 5 4 6 7 8 9      moved
-	        //
-	        // j=5, k=2                j   k
-	        // segment                 5 4 7 6
-	        // members       0 1 2 3 x 5 4 6 7 8 9      move 7 to j+k
-	        // members       0 1 2 3 x 5 4 7 6 x 8 9    moved
-	        //
-	        // j=5, k=3                j     k
-	        // segment                 5 4 7 6
-	        // members       0 1 2 3 x 5 4 7 6 x 8 9    keep 6 in j+k
-	        //
-	        function moveMember(arr, findIndex, toIndex) {
-	            for (var i = 0; i < arr.length; i++) {
-	                if (arr[i].index === findIndex) {
-	                    break;
-	                }
-	            }
-
-	            var item = Object.assign({}, arr[i]);   // shallow copy
-	            arr[i].index = -1;   // mark as dead
-	            item.index = toIndex;
-	            arr.splice(toIndex, 0, item);
-	        }
-
-
-	        // This is the same as `Relation.indexedMembers`,
-	        // Except we don't want to index all the members, only the ways
-	        function withIndex(arr) {
-	            var result = new Array(arr.length);
-	            for (var i = 0; i < arr.length; i++) {
-	                result[i] = Object.assign({}, arr[i]);   // shallow copy
-	                result[i].index = i;
-	            }
-	            return result;
-	        }
-	    }
-
-	}
-
-	function actionAddMidpoint(midpoint, node) {
-	    return function(graph) {
-	        graph = graph.replace(node.move(midpoint.loc));
-
-	        var parents = utilArrayIntersection(
-	            graph.parentWays(graph.entity(midpoint.edge[0])),
-	            graph.parentWays(graph.entity(midpoint.edge[1]))
-	        );
-
-	        parents.forEach(function(way) {
-	            for (var i = 0; i < way.nodes.length - 1; i++) {
-	                if (geoEdgeEqual([way.nodes[i], way.nodes[i + 1]], midpoint.edge)) {
-	                    graph = graph.replace(graph.entity(way.id).addNode(node.id, i + 1));
-
-	                    // Add only one midpoint on doubled-back segments,
-	                    // turning them into self-intersections.
-	                    return;
-	                }
-	            }
-	        });
-
-	        return graph;
-	    };
-	}
-
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/AddNodeToWayAction.as
-	function actionAddVertex(wayId, nodeId, index) {
-	    return function(graph) {
-	        return graph.replace(graph.entity(wayId).addNode(nodeId, index));
-	    };
-	}
-
-	function actionChangeMember(relationId, member, memberIndex) {
-	    return function(graph) {
-	        return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
-	    };
-	}
-
-	function actionChangePreset(entityID, oldPreset, newPreset, skipFieldDefaults) {
-	    return function action(graph) {
-	        var entity = graph.entity(entityID);
-	        var geometry = entity.geometry(graph);
-	        var tags = entity.tags;
-
-	        if (oldPreset) { tags = oldPreset.unsetTags(tags, geometry); }
-	        if (newPreset) { tags = newPreset.setTags(tags, geometry, skipFieldDefaults); }
-
-	        return graph.replace(entity.update({tags: tags}));
-	    };
-	}
-
-	function actionChangeTags(entityId, tags) {
-	    return function(graph) {
-	        var entity = graph.entity(entityId);
-	        return graph.replace(entity.update({tags: tags}));
-	    };
-	}
-
-	function osmNode() {
-	    if (!(this instanceof osmNode)) {
-	        return (new osmNode()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
-	    }
-	}
-
-	osmEntity.node = osmNode;
-
-	osmNode.prototype = Object.create(osmEntity.prototype);
-
-	Object.assign(osmNode.prototype, {
-	    type: 'node',
-	    loc: [9999, 9999],
-
-	    extent: function() {
-	        return new geoExtent(this.loc);
-	    },
-
-
-	    geometry: function(graph) {
-	        return graph.transient(this, 'geometry', function() {
-	            return graph.isPoi(this) ? 'point' : 'vertex';
-	        });
-	    },
-
-
-	    move: function(loc) {
-	        return this.update({loc: loc});
-	    },
-
-
-	    isDegenerate: function() {
-	        return !(
-	            Array.isArray(this.loc) && this.loc.length === 2 &&
-	            this.loc[0] >= -180 && this.loc[0] <= 180 &&
-	            this.loc[1] >= -90 && this.loc[1] <= 90
-	        );
-	    },
-
-
-	    // Inspect tags and geometry to determine which direction(s) this node/vertex points
-	    directions: function(resolver, projection) {
-	        var val;
-	        var i;
-
-	        // which tag to use?
-	        if (this.isHighwayIntersection(resolver) && (this.tags.stop || '').toLowerCase() === 'all') {
-	            // all-way stop tag on a highway intersection
-	            val = 'all';
-	        } else {
-	            // generic direction tag
-	            val = (this.tags.direction || '').toLowerCase();
-
-	            // better suffix-style direction tag
-	            var re = /:direction$/i;
-	            var keys = Object.keys(this.tags);
-	            for (i = 0; i < keys.length; i++) {
-	                if (re.test(keys[i])) {
-	                    val = this.tags[keys[i]].toLowerCase();
-	                    break;
-	                }
-	            }
-	        }
-
-	        if (val === '') { return []; }
-
-	        var cardinal = {
-	            north: 0,               n: 0,
-	            northnortheast: 22,     nne: 22,
-	            northeast: 45,          ne: 45,
-	            eastnortheast: 67,      ene: 67,
-	            east: 90,               e: 90,
-	            eastsoutheast: 112,     ese: 112,
-	            southeast: 135,         se: 135,
-	            southsoutheast: 157,    sse: 157,
-	            south: 180,             s: 180,
-	            southsouthwest: 202,    ssw: 202,
-	            southwest: 225,         sw: 225,
-	            westsouthwest: 247,     wsw: 247,
-	            west: 270,              w: 270,
-	            westnorthwest: 292,     wnw: 292,
-	            northwest: 315,         nw: 315,
-	            northnorthwest: 337,    nnw: 337
-	        };
-
-
-	        var values = val.split(';');
-	        var results = [];
-
-	        values.forEach(function(v) {
-	            // swap cardinal for numeric directions
-	            if (cardinal[v] !== undefined) {
-	                v = cardinal[v];
-	            }
-
-	            // numeric direction - just add to results
-	            if (v !== '' && !isNaN(+v)) {
-	                results.push(+v);
-	                return;
-	            }
-
-	            // string direction - inspect parent ways
-	            var lookBackward =
-	                (this.tags['traffic_sign:backward'] || v === 'backward' || v === 'both' || v === 'all');
-	            var lookForward =
-	                (this.tags['traffic_sign:forward'] || v === 'forward' || v === 'both' || v === 'all');
-
-	            if (!lookForward && !lookBackward) { return; }
-
-	            var nodeIds = {};
-	            resolver.parentWays(this).forEach(function(parent) {
-	                var nodes = parent.nodes;
-	                for (i = 0; i < nodes.length; i++) {
-	                    if (nodes[i] === this.id) {  // match current entity
-	                        if (lookForward && i > 0) {
-	                            nodeIds[nodes[i - 1]] = true;  // look back to prev node
-	                        }
-	                        if (lookBackward && i < nodes.length - 1) {
-	                            nodeIds[nodes[i + 1]] = true;  // look ahead to next node
-	                        }
-	                    }
-	                }
-	            }, this);
-
-	            Object.keys(nodeIds).forEach(function(nodeId) {
-	                // +90 because geoAngle returns angle from X axis, not Y (north)
-	                results.push(
-	                    (geoAngle(this, resolver.entity(nodeId), projection) * (180 / Math.PI)) + 90
-	                );
-	            }, this);
-
-	        }, this);
-
-	        return utilArrayUniq(results);
-	    },
-
-
-	    isEndpoint: function(resolver) {
-	        return resolver.transient(this, 'isEndpoint', function() {
-	            var id = this.id;
-	            return resolver.parentWays(this).filter(function(parent) {
-	                return !parent.isClosed() && !!parent.affix(id);
-	            }).length > 0;
-	        });
-	    },
-
-
-	    isConnected: function(resolver) {
-	        return resolver.transient(this, 'isConnected', function() {
-	            var parents = resolver.parentWays(this);
-
-	            if (parents.length > 1) {
-	                // vertex is connected to multiple parent ways
-	                for (var i in parents) {
-	                    if (parents[i].geometry(resolver) === 'line' &&
-	                        parents[i].hasInterestingTags()) { return true; }
-	                }
-	            } else if (parents.length === 1) {
-	                var way = parents[0];
-	                var nodes = way.nodes.slice();
-	                if (way.isClosed()) { nodes.pop(); }  // ignore connecting node if closed
-
-	                // return true if vertex appears multiple times (way is self intersecting)
-	                return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
-	            }
-
-	            return false;
-	        });
-	    },
-
-
-	    parentIntersectionWays: function(resolver) {
-	        return resolver.transient(this, 'parentIntersectionWays', function() {
-	            return resolver.parentWays(this).filter(function(parent) {
-	                return (parent.tags.highway ||
-	                    parent.tags.waterway ||
-	                    parent.tags.railway ||
-	                    parent.tags.aeroway) &&
-	                    parent.geometry(resolver) === 'line';
-	            });
-	        });
-	    },
-
-
-	    isIntersection: function(resolver) {
-	        return this.parentIntersectionWays(resolver).length > 1;
-	    },
-
-
-	    isHighwayIntersection: function(resolver) {
-	        return resolver.transient(this, 'isHighwayIntersection', function() {
-	            return resolver.parentWays(this).filter(function(parent) {
-	                return parent.tags.highway && parent.geometry(resolver) === 'line';
-	            }).length > 1;
-	        });
-	    },
-
-
-	    isOnAddressLine: function(resolver) {
-	        return resolver.transient(this, 'isOnAddressLine', function() {
-	            return resolver.parentWays(this).filter(function(parent) {
-	                return parent.tags.hasOwnProperty('addr:interpolation') &&
-	                    parent.geometry(resolver) === 'line';
-	            }).length > 0;
-	        });
-	    },
-
-
-	    asJXON: function(changeset_id) {
-	        var r = {
-	            node: {
-	                '@id': this.osmId(),
-	                '@lon': this.loc[0],
-	                '@lat': this.loc[1],
-	                '@version': (this.version || 0),
-	                tag: Object.keys(this.tags).map(function(k) {
-	                    return { keyAttributes: { k: k, v: this.tags[k] } };
-	                }, this)
-	            }
-	        };
-	        if (changeset_id) { r.node['@changeset'] = changeset_id; }
-	        return r;
-	    },
-
-
-	    asGeoJSON: function() {
-	        return {
-	            type: 'Point',
-	            coordinates: this.loc
-	        };
-	    }
-	});
-
-	function actionCircularize(wayId, projection, maxAngle) {
-	    maxAngle = (maxAngle || 20) * Math.PI / 180;
-
-
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var way = graph.entity(wayId);
-	        var origNodes = {};
-
-	        graph.childNodes(way).forEach(function(node) {
-	            if (!origNodes[node.id]) { origNodes[node.id] = node; }
-	        });
-
-	        if (!way.isConvex(graph)) {
-	            graph = action.makeConvex(graph);
-	        }
-
-	        var nodes = utilArrayUniq(graph.childNodes(way));
-	        var keyNodes = nodes.filter(function(n) { return graph.parentWays(n).length !== 1; });
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var keyPoints = keyNodes.map(function(n) { return projection(n.loc); });
-	        var centroid = (points.length === 2) ? geoVecInterp(points[0], points[1], 0.5) : d3_polygonCentroid(points);
-	        var radius = d3_median(points, function(p) { return geoVecLength(centroid, p); });
-	        var sign = d3_polygonArea(points) > 0 ? 1 : -1;
-	        var ids, i, j, k;
-
-	        // we need atleast two key nodes for the algorithm to work
-	        if (!keyNodes.length) {
-	            keyNodes = [nodes[0]];
-	            keyPoints = [points[0]];
-	        }
-
-	        if (keyNodes.length === 1) {
-	            var index = nodes.indexOf(keyNodes[0]);
-	            var oppositeIndex = Math.floor((index + nodes.length / 2) % nodes.length);
-
-	            keyNodes.push(nodes[oppositeIndex]);
-	            keyPoints.push(points[oppositeIndex]);
-	        }
-
-	        // key points and nodes are those connected to the ways,
-	        // they are projected onto the circle, inbetween nodes are moved
-	        // to constant intervals between key nodes, extra inbetween nodes are
-	        // added if necessary.
-	        for (i = 0; i < keyPoints.length; i++) {
-	            var nextKeyNodeIndex = (i + 1) % keyNodes.length;
-	            var startNode = keyNodes[i];
-	            var endNode = keyNodes[nextKeyNodeIndex];
-	            var startNodeIndex = nodes.indexOf(startNode);
-	            var endNodeIndex = nodes.indexOf(endNode);
-	            var numberNewPoints = -1;
-	            var indexRange = endNodeIndex - startNodeIndex;
-	            var nearNodes = {};
-	            var inBetweenNodes = [];
-	            var startAngle, endAngle, totalAngle, eachAngle;
-	            var angle, loc, node, origNode;
-
-	            if (indexRange < 0) {
-	                indexRange += nodes.length;
-	            }
-
-	            // position this key node
-	            var distance = geoVecLength(centroid, keyPoints[i]) || 1e-4;
-	            keyPoints[i] = [
-	                centroid[0] + (keyPoints[i][0] - centroid[0]) / distance * radius,
-	                centroid[1] + (keyPoints[i][1] - centroid[1]) / distance * radius
-	            ];
-	            loc = projection.invert(keyPoints[i]);
-	            node = keyNodes[i];
-	            origNode = origNodes[node.id];
-	            node = node.move(geoVecInterp(origNode.loc, loc, t));
-	            graph = graph.replace(node);
-
-	            // figure out the between delta angle we want to match to
-	            startAngle = Math.atan2(keyPoints[i][1] - centroid[1], keyPoints[i][0] - centroid[0]);
-	            endAngle = Math.atan2(keyPoints[nextKeyNodeIndex][1] - centroid[1], keyPoints[nextKeyNodeIndex][0] - centroid[0]);
-	            totalAngle = endAngle - startAngle;
-
-	            // detects looping around -pi/pi
-	            if (totalAngle * sign > 0) {
-	                totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
-	            }
-
-	            do {
-	                numberNewPoints++;
-	                eachAngle = totalAngle / (indexRange + numberNewPoints);
-	            } while (Math.abs(eachAngle) > maxAngle);
-
-
-	            // move existing nodes
-	            for (j = 1; j < indexRange; j++) {
-	                angle = startAngle + j * eachAngle;
-	                loc = projection.invert([
-	                    centroid[0] + Math.cos(angle) * radius,
-	                    centroid[1] + Math.sin(angle) * radius
-	                ]);
-
-	                node = nodes[(j + startNodeIndex) % nodes.length];
-	                origNode = origNodes[node.id];
-	                nearNodes[node.id] = angle;
-
-	                node = node.move(geoVecInterp(origNode.loc, loc, t));
-	                graph = graph.replace(node);
-	            }
-
-	            // add new inbetween nodes if necessary
-	            for (j = 0; j < numberNewPoints; j++) {
-	                angle = startAngle + (indexRange + j) * eachAngle;
-	                loc = projection.invert([
-	                    centroid[0] + Math.cos(angle) * radius,
-	                    centroid[1] + Math.sin(angle) * radius
-	                ]);
-
-	                // choose a nearnode to use as the original
-	                var min = Infinity;
-	                for (var nodeId in nearNodes) {
-	                    var nearAngle = nearNodes[nodeId];
-	                    var dist = Math.abs(nearAngle - angle);
-	                    if (dist < min) {
-	                        dist = min;
-	                        origNode = origNodes[nodeId];
-	                    }
-	                }
-
-	                node = osmNode({ loc: geoVecInterp(origNode.loc, loc, t) });
-	                graph = graph.replace(node);
-
-	                nodes.splice(endNodeIndex + j, 0, node);
-	                inBetweenNodes.push(node.id);
-	            }
-
-	            // Check for other ways that share these keyNodes..
-	            // If keyNodes are adjacent in both ways,
-	            // we can add inBetween nodes to that shared way too..
-	            if (indexRange === 1 && inBetweenNodes.length) {
-	                var startIndex1 = way.nodes.lastIndexOf(startNode.id);
-	                var endIndex1 = way.nodes.lastIndexOf(endNode.id);
-	                var wayDirection1 = (endIndex1 - startIndex1);
-	                if (wayDirection1 < -1) { wayDirection1 = 1; }
-
-	                var parentWays = graph.parentWays(keyNodes[i]);
-	                for (j = 0; j < parentWays.length; j++) {
-	                    var sharedWay = parentWays[j];
-	                    if (sharedWay === way) { continue; }
-
-	                    if (sharedWay.areAdjacent(startNode.id, endNode.id)) {
-	                        var startIndex2 = sharedWay.nodes.lastIndexOf(startNode.id);
-	                        var endIndex2 = sharedWay.nodes.lastIndexOf(endNode.id);
-	                        var wayDirection2 = (endIndex2 - startIndex2);
-	                        var insertAt = endIndex2;
-	                        if (wayDirection2 < -1) { wayDirection2 = 1; }
-
-	                        if (wayDirection1 !== wayDirection2) {
-	                            inBetweenNodes.reverse();
-	                            insertAt = startIndex2;
-	                        }
-	                        for (k = 0; k < inBetweenNodes.length; k++) {
-	                            sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
-	                        }
-	                        graph = graph.replace(sharedWay);
-	                    }
-	                }
-	            }
-
-	        }
-
-	        // update the way to have all the new nodes
-	        ids = nodes.map(function(n) { return n.id; });
-	        ids.push(ids[0]);
-
-	        way = way.update({nodes: ids});
-	        graph = graph.replace(way);
-
-	        return graph;
-	    };
-
-
-	    action.makeConvex = function(graph) {
-	        var way = graph.entity(wayId);
-	        var nodes = utilArrayUniq(graph.childNodes(way));
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var sign = d3_polygonArea(points) > 0 ? 1 : -1;
-	        var hull = d3_polygonHull(points);
-	        var i, j;
-
-	        // D3 convex hulls go counterclockwise..
-	        if (sign === -1) {
-	            nodes.reverse();
-	            points.reverse();
-	        }
-
-	        for (i = 0; i < hull.length - 1; i++) {
-	            var startIndex = points.indexOf(hull[i]);
-	            var endIndex = points.indexOf(hull[i+1]);
-	            var indexRange = (endIndex - startIndex);
-
-	            if (indexRange < 0) {
-	                indexRange += nodes.length;
-	            }
-
-	            // move interior nodes to the surface of the convex hull..
-	            for (j = 1; j < indexRange; j++) {
-	                var point = geoVecInterp(hull[i], hull[i+1], j / indexRange);
-	                var node = nodes[(j + startIndex) % nodes.length].move(projection.invert(point));
-	                graph = graph.replace(node);
-	            }
-	        }
-	        return graph;
-	    };
-
-
-	    action.disabled = function(graph) {
-	        if (!graph.entity(wayId).isClosed()) {
-	            return 'not_closed';
-	        }
-
-	        //disable when already circular
-	        var way = graph.entity(wayId);
-	        var nodes = utilArrayUniq(graph.childNodes(way));
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var hull = d3_polygonHull(points);
-	        var epsilonAngle =  Math.PI / 180;
-	        if (hull.length !== points.length || hull.length < 3){
-	            return false;
-	        }
-	        var centroid = d3_polygonCentroid(points);
-	        var radius = geoVecLengthSquare(centroid, points[0]);
-
-	        // compare distances between centroid and points
-	        for (var i = 0; i<hull.length; i++){
-	            var actualPoint = hull[i];
-	            var actualDist = geoVecLengthSquare(actualPoint, centroid);
-	            var diff = Math.abs(actualDist - radius);
-	            //compare distances with epsilon-error (5%)
-	            if (diff > 0.05*radius) {
-	                return false;
-	            }
-	        }
-	        
-	        //check if central angles are smaller than maxAngle
-	        for (i = 0; i<hull.length; i++){
-	            actualPoint = hull[i];
-	            var nextPoint = hull[(i+1)%hull.length];
-	            var startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
-	            var endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
-	            var angle = endAngle - startAngle;
-	            if (angle < 0) {
-	                angle = -angle;
-	            }
-	            if (angle > Math.PI){
-	                angle = (2*Math.PI - angle);
-	            }
-	 
-	            if (angle > maxAngle + epsilonAngle) {
-	                return false;
-	            }
-	        }
-	        return 'already_circular';
-	    };
-
-
-	    action.transitionable = true;
-
-
-	    return action;
-	}
-
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/DeleteWayAction.as
-	function actionDeleteWay(wayID) {
-
-	    function canDeleteNode(node, graph) {
-	        // don't delete nodes still attached to ways or relations
-	        if (graph.parentWays(node).length ||
-	            graph.parentRelations(node).length) { return false; }
-
-	        var geometries = osmNodeGeometriesForTags(node.tags);
-	        // don't delete if this node can be a standalone point
-	        if (geometries.point) { return false; }
-	        // delete if this node only be a vertex
-	        if (geometries.vertex) { return true; }
-
-	        // iD doesn't know if this should be a point or vertex,
-	        // so only delete if there are no interesting tags
-	        return !node.hasInterestingTags();
-	    }
-
-
-	    var action = function(graph) {
-	        var way = graph.entity(wayID);
-
-	        graph.parentRelations(way).forEach(function(parent) {
-	            parent = parent.removeMembersWithID(wayID);
-	            graph = graph.replace(parent);
-
-	            if (parent.isDegenerate()) {
-	                graph = actionDeleteRelation(parent.id)(graph);
-	            }
-	        });
-
-	        (new Set(way.nodes)).forEach(function(nodeID) {
-	            graph = graph.replace(way.removeNode(nodeID));
-
-	            var node = graph.entity(nodeID);
-	            if (canDeleteNode(node, graph)) {
-	                graph = graph.remove(node);
-	            }
-	        });
-
-	        return graph.remove(way);
-	    };
-
-
-	    return action;
-	}
-
-	function actionDeleteMultiple(ids) {
-	    var actions = {
-	        way: actionDeleteWay,
-	        node: actionDeleteNode,
-	        relation: actionDeleteRelation
-	    };
-
-
-	    var action = function(graph) {
-	        ids.forEach(function(id) {
-	            if (graph.hasEntity(id)) { // It may have been deleted aready.
-	                graph = actions[graph.entity(id).type](id)(graph);
-	            }
-	        });
-
-	        return graph;
-	    };
-
-
-	    return action;
-	}
-
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/DeleteRelationAction.as
-	function actionDeleteRelation(relationID, allowUntaggedMembers) {
-
-	    function canDeleteEntity(entity, graph) {
-	        return !graph.parentWays(entity).length &&
-	            !graph.parentRelations(entity).length &&
-	            (!entity.hasInterestingTags() && !allowUntaggedMembers);
-	    }
-
-
-	    var action = function(graph) {
-	        var relation = graph.entity(relationID);
-
-	        graph.parentRelations(relation)
-	            .forEach(function(parent) {
-	                parent = parent.removeMembersWithID(relationID);
-	                graph = graph.replace(parent);
-
-	                if (parent.isDegenerate()) {
-	                    graph = actionDeleteRelation(parent.id)(graph);
-	                }
-	            });
-
-	        var memberIDs = utilArrayUniq(relation.members.map(function(m) { return m.id; }));
-	        memberIDs.forEach(function(memberID) {
-	            graph = graph.replace(relation.removeMembersWithID(memberID));
-
-	            var entity = graph.entity(memberID);
-	            if (canDeleteEntity(entity, graph)) {
-	                graph = actionDeleteMultiple([memberID])(graph);
-	            }
-	        });
-
-	        return graph.remove(relation);
-	    };
-
-
-	    return action;
-	}
-
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/DeleteNodeAction.as
-	function actionDeleteNode(nodeId) {
-	    var action = function(graph) {
-	        var node = graph.entity(nodeId);
-
-	        graph.parentWays(node)
-	            .forEach(function(parent) {
-	                parent = parent.removeNode(nodeId);
-	                graph = graph.replace(parent);
-
-	                if (parent.isDegenerate()) {
-	                    graph = actionDeleteWay(parent.id)(graph);
-	                }
-	            });
-
-	        graph.parentRelations(node)
-	            .forEach(function(parent) {
-	                parent = parent.removeMembersWithID(nodeId);
-	                graph = graph.replace(parent);
-
-	                if (parent.isDegenerate()) {
-	                    graph = actionDeleteRelation(parent.id)(graph);
-	                }
-	            });
-
-	        return graph.remove(node);
-	    };
-
-
-	    return action;
-	}
-
-	// Connect the ways at the given nodes.
-	//
-	// First choose a node to be the survivor, with preference given
-	// to an existing (not new) node.
-	//
-	// Tags and relation memberships of of non-surviving nodes are merged
-	// to the survivor.
-	//
-	// This is the inverse of `iD.actionDisconnect`.
-	//
-	// Reference:
-	//   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeNodesAction.as
-	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/MergeNodesAction.java
-	//
-	function actionConnect(nodeIDs) {
-	    var action = function(graph) {
-	        var survivor;
-	        var node;
-	        var parents;
-	        var i, j;
-
-	        // Choose a survivor node, prefer an existing (not new) node - #4974
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            survivor = graph.entity(nodeIDs[i]);
-	            if (survivor.version) { break; }  // found one
-	        }
-
-	        // Replace all non-surviving nodes with the survivor and merge tags.
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            node = graph.entity(nodeIDs[i]);
-	            if (node.id === survivor.id) { continue; }
-
-	            parents = graph.parentWays(node);
-	            for (j = 0; j < parents.length; j++) {
-	                graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
-	            }
-
-	            parents = graph.parentRelations(node);
-	            for (j = 0; j < parents.length; j++) {
-	                graph = graph.replace(parents[j].replaceMember(node, survivor));
-	            }
-
-	            survivor = survivor.mergeTags(node.tags);
-	            graph = actionDeleteNode(node.id)(graph);
-	        }
-
-	        graph = graph.replace(survivor);
-
-	        // find and delete any degenerate ways created by connecting adjacent vertices
-	        parents = graph.parentWays(survivor);
-	        for (i = 0; i < parents.length; i++) {
-	            if (parents[i].isDegenerate()) {
-	                graph = actionDeleteWay(parents[i].id)(graph);
-	            }
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.disabled = function(graph) {
-	        var seen = {};
-	        var restrictionIDs = [];
-	        var survivor;
-	        var node, way;
-	        var relations, relation, role;
-	        var i, j, k;
-
-	        // Choose a survivor node, prefer an existing (not new) node - #4974
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            survivor = graph.entity(nodeIDs[i]);
-	            if (survivor.version) { break; }  // found one
-	        }
-
-	        // 1. disable if the nodes being connected have conflicting relation roles
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            node = graph.entity(nodeIDs[i]);
-	            relations = graph.parentRelations(node);
-
-	            for (j = 0; j < relations.length; j++) {
-	                relation = relations[j];
-	                role = relation.memberById(node.id).role || '';
-
-	                // if this node is a via node in a restriction, remember for later
-	                if (relation.hasFromViaTo()) {
-	                    restrictionIDs.push(relation.id);
-	                }
-
-	                if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
-	                    return 'relation';
-	                } else {
-	                    seen[relation.id] = role;
-	                }
-	            }
-	        }
-
-	        // gather restrictions for parent ways
-	        for (i = 0; i < nodeIDs.length; i++) {
-	            node = graph.entity(nodeIDs[i]);
-
-	            var parents = graph.parentWays(node);
-	            for (j = 0; j < parents.length; j++) {
-	                var parent = parents[j];
-	                relations = graph.parentRelations(parent);
-
-	                for (k = 0; k < relations.length; k++) {
-	                    relation = relations[k];
-	                    if (relation.hasFromViaTo()) {
-	                        restrictionIDs.push(relation.id);
-	                    }
-	                }
-	            }
-	        }
-
-
-	        // test restrictions
-	        restrictionIDs = utilArrayUniq(restrictionIDs);
-	        for (i = 0; i < restrictionIDs.length; i++) {
-	            relation = graph.entity(restrictionIDs[i]);
-	            if (!relation.isComplete(graph)) { continue; }
-
-	            var memberWays = relation.members
-	                .filter(function(m) { return m.type === 'way'; })
-	                .map(function(m) { return graph.entity(m.id); });
-
-	            memberWays = utilArrayUniq(memberWays);
-	            var f = relation.memberByRole('from');
-	            var t = relation.memberByRole('to');
-	            var isUturn = (f.id === t.id);
-
-	            // 2a. disable if connection would damage a restriction
-	            // (a key node is a node at the junction of ways)
-	            var nodes = { from: [], via: [], to: [], keyfrom: [], keyto: [] };
-	            for (j = 0; j < relation.members.length; j++) {
-	                collectNodes(relation.members[j], nodes);
-	            }
-
-	            nodes.keyfrom = utilArrayUniq(nodes.keyfrom.filter(hasDuplicates));
-	            nodes.keyto = utilArrayUniq(nodes.keyto.filter(hasDuplicates));
-
-	            var filter = keyNodeFilter(nodes.keyfrom, nodes.keyto);
-	            nodes.from = nodes.from.filter(filter);
-	            nodes.via = nodes.via.filter(filter);
-	            nodes.to = nodes.to.filter(filter);
-
-	            var connectFrom = false;
-	            var connectVia = false;
-	            var connectTo = false;
-	            var connectKeyFrom = false;
-	            var connectKeyTo = false;
-
-	            for (j = 0; j < nodeIDs.length; j++) {
-	                var n = nodeIDs[j];
-	                if (nodes.from.indexOf(n) !== -1)    { connectFrom = true; }
-	                if (nodes.via.indexOf(n) !== -1)     { connectVia = true; }
-	                if (nodes.to.indexOf(n) !== -1)      { connectTo = true; }
-	                if (nodes.keyfrom.indexOf(n) !== -1) { connectKeyFrom = true; }
-	                if (nodes.keyto.indexOf(n) !== -1)   { connectKeyTo = true; }
-	            }
-	            if (connectFrom && connectTo && !isUturn) { return 'restriction'; }
-	            if (connectFrom && connectVia) { return 'restriction'; }
-	            if (connectTo   && connectVia) { return 'restriction'; }
-
-	            // connecting to a key node -
-	            // if both nodes are on a member way (i.e. part of the turn restriction),
-	            // the connecting node must be adjacent to the key node.
-	            if (connectKeyFrom || connectKeyTo) {
-	                if (nodeIDs.length !== 2) { return 'restriction'; }
-
-	                var n0 = null;
-	                var n1 = null;
-	                for (j = 0; j < memberWays.length; j++) {
-	                    way = memberWays[j];
-	                    if (way.contains(nodeIDs[0])) { n0 = nodeIDs[0]; }
-	                    if (way.contains(nodeIDs[1])) { n1 = nodeIDs[1]; }
-	                }
-
-	                if (n0 && n1) {    // both nodes are part of the restriction
-	                    var ok = false;
-	                    for (j = 0; j < memberWays.length; j++) {
-	                        way = memberWays[j];
-	                        if (way.areAdjacent(n0, n1)) {
-	                            ok = true;
-	                            break;
-	                        }
-	                    }
-	                    if (!ok) {
-	                        return 'restriction';
-	                    }
-	                }
-	            }
-
-	            // 2b. disable if nodes being connected will destroy a member way in a restriction
-	            // (to test, make a copy and try actually connecting the nodes)
-	            for (j = 0; j < memberWays.length; j++) {
-	                way = memberWays[j].update({});   // make copy
-	                for (k = 0; k < nodeIDs.length; k++) {
-	                    if (nodeIDs[k] === survivor.id) { continue; }
-
-	                    if (way.areAdjacent(nodeIDs[k], survivor.id)) {
-	                        way = way.removeNode(nodeIDs[k]);
-	                    } else {
-	                        way = way.replaceNode(nodeIDs[k], survivor.id);
-	                    }
-	                }
-	                if (way.isDegenerate()) {
-	                    return 'restriction';
-	                }
-	            }
-	        }
-
-	        return false;
-
-
-	        // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
-	        function hasDuplicates(n, i, arr) {
-	            return arr.indexOf(n) !== arr.lastIndexOf(n);
-	        }
-
-	        function keyNodeFilter(froms, tos) {
-	            return function(n) {
-	                return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
-	            };
-	        }
-
-	        function collectNodes(member, collection) {
-	            var entity = graph.hasEntity(member.id);
-	            if (!entity) { return; }
-
-	            var role = member.role || '';
-	            if (!collection[role]) {
-	                collection[role] = [];
-	            }
-
-	            if (member.type === 'node') {
-	                collection[role].push(member.id);
-	                if (role === 'via') {
-	                    collection.keyfrom.push(member.id);
-	                    collection.keyto.push(member.id);
-	                }
-
-	            } else if (member.type === 'way') {
-	                collection[role].push.apply(collection[role], entity.nodes);
-	                if (role === 'from' || role === 'via') {
-	                    collection.keyfrom.push(entity.first());
-	                    collection.keyfrom.push(entity.last());
-	                }
-	                if (role === 'to' || role === 'via') {
-	                    collection.keyto.push(entity.first());
-	                    collection.keyto.push(entity.last());
-	                }
-	            }
-	        }
-	    };
-
-
-	    return action;
-	}
-
-	function actionCopyEntities(ids, fromGraph) {
-	    var _copies = {};
-
-
-	    var action = function(graph) {
-	        ids.forEach(function(id) {
-	            fromGraph.entity(id).copy(fromGraph, _copies);
-	        });
-
-	        for (var id in _copies) {
-	            graph = graph.replace(_copies[id]);
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.copies = function() {
-	        return _copies;
-	    };
-
-
-	    return action;
-	}
-
-	function actionDeleteMember(relationId, memberIndex) {
-	    return function(graph) {
-	        var relation = graph.entity(relationId)
-	            .removeMember(memberIndex);
-
-	        graph = graph.replace(relation);
-
-	        if (relation.isDegenerate())
-	            { graph = actionDeleteRelation(relation.id)(graph); }
-
-	        return graph;
-	    };
-	}
-
-	function actionDiscardTags(difference, discardTags) {
-	  discardTags = discardTags || {};
-
-	  return function (graph) {
-	    difference.modified().forEach(checkTags);
-	    difference.created().forEach(checkTags);
-	    return graph;
-
-	    function checkTags(entity) {
-	      var keys = Object.keys(entity.tags);
-	      var didDiscard = false;
-	      var tags = {};
-
-	      for (var i = 0; i < keys.length; i++) {
-	        var k = keys[i];
-	        if (discardTags[k] || !entity.tags[k]) {
-	          didDiscard = true;
-	        } else {
-	          tags[k] = entity.tags[k];
-	        }
-	      }
-	      if (didDiscard) {
-	        graph = graph.replace(entity.update({ tags: tags }));
-	      }
-	    }
-
-	  };
-	}
-
-	// Disconect the ways at the given node.
-	//
-	// Optionally, disconnect only the given ways.
-	//
-	// For testing convenience, accepts an ID to assign to the (first) new node.
-	// Normally, this will be undefined and the way will automatically
-	// be assigned a new ID.
-	//
-	// This is the inverse of `iD.actionConnect`.
-	//
-	// Reference:
-	//   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
-	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
-	//
-	function actionDisconnect(nodeId, newNodeId) {
-	    var wayIds;
-
-
-	    var action = function(graph) {
-	        var node = graph.entity(nodeId);
-	        var connections = action.connections(graph);
-
-	        connections.forEach(function(connection) {
-	            var way = graph.entity(connection.wayID);
-	            var newNode = osmNode({id: newNodeId, loc: node.loc, tags: node.tags});
-
-	            graph = graph.replace(newNode);
-	            if (connection.index === 0 && way.isArea()) {
-	                // replace shared node with shared node..
-	                graph = graph.replace(way.replaceNode(way.nodes[0], newNode.id));
-	            } else if (way.isClosed() && connection.index === way.nodes.length - 1) {
-	                // replace closing node with new new node..
-	                graph = graph.replace(way.unclose().addNode(newNode.id));
-	            } else {
-	                // replace shared node with multiple new nodes..
-	                graph = graph.replace(way.updateNode(newNode.id, connection.index));
-	            }
-	        });
-
-	        return graph;
-	    };
-
-
-	    action.connections = function(graph) {
-	        var candidates = [];
-	        var keeping = false;
-	        var parentWays = graph.parentWays(graph.entity(nodeId));
-	        var way, waynode;
-	        for (var i = 0; i < parentWays.length; i++) {
-	            way = parentWays[i];
-	            if (wayIds && wayIds.indexOf(way.id) === -1) {
-	                keeping = true;
-	                continue;
-	            }
-	            if (way.isArea() && (way.nodes[0] === nodeId)) {
-	                candidates.push({ wayID: way.id, index: 0 });
-	            } else {
-	                for (var j = 0; j < way.nodes.length; j++) {
-	                    waynode = way.nodes[j];
-	                    if (waynode === nodeId) {
-	                        if (way.isClosed() &&
-	                            parentWays.length > 1 &&
-	                            wayIds &&
-	                            wayIds.indexOf(way.id) !== -1 &&
-	                            j === way.nodes.length - 1) {
-	                            continue;
-	                        }
-	                        candidates.push({ wayID: way.id, index: j });
-	                    }
-	                }
-	            }
-	        }
-
-	        return keeping ? candidates : candidates.slice(1);
-	    };
-
-
-	    action.disabled = function(graph) {
-	        var connections = action.connections(graph);
-	        if (connections.length === 0)
-	            { return 'not_connected'; }
-
-	        var parentWays = graph.parentWays(graph.entity(nodeId));
-	        var seenRelationIds = {};
-	        var sharedRelation;
-
-	        parentWays.forEach(function(way) {
-	            var relations = graph.parentRelations(way);
-	            relations.forEach(function(relation) {
-	                if (relation.id in seenRelationIds) {
-	                    if (wayIds) {
-	                        if (wayIds.indexOf(way.id) !== -1 ||
-	                            wayIds.indexOf(seenRelationIds[relation.id]) !== -1) {
-	                            sharedRelation = relation;
-	                        }
-	                    } else {
-	                        sharedRelation = relation;
-	                    }
-	                } else {
-	                    seenRelationIds[relation.id] = way.id;
-	                }
-	            });
-	        });
-
-	        if (sharedRelation)
-	            { return 'relation'; }
-	    };
-
-
-	    action.limitWays = function(val) {
-	        if (!arguments.length) { return wayIds; }
-	        wayIds = val;
-	        return action;
-	    };
-
-
-	    return action;
-	}
-
-	function actionExtract(entityID) {
-
-	    var extractedNodeID;
-
-	    var action = function(graph) {
-	        var entity = graph.entity(entityID);
-
-	        if (entity.type === 'node') {
-	            return extractFromNode(entity, graph);
-	        }
-
-	        return extractFromWayOrRelation(entity, graph);
-	    };
-
-	    function extractFromNode(node, graph) {
-
-	        extractedNodeID = node.id;
-
-	        // Create a new node to replace the one we will detach
-	        var replacement = osmNode({ loc: node.loc });
-	        graph = graph.replace(replacement);
-
-	        // Process each way in turn, updating the graph as we go
-	        graph = graph.parentWays(node)
-	            .reduce(function(accGraph, parentWay) {
-	                return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
-	            }, graph);
-
-	        // Process any relations too
-	        return graph.parentRelations(node)
-	            .reduce(function(accGraph, parentRel) {
-	                return accGraph.replace(parentRel.replaceMember(node, replacement));
-	            }, graph);
-	    }
-
-	    function extractFromWayOrRelation(entity, graph) {
-
-	        var fromGeometry = entity.geometry(graph);
-
-	        var keysToCopyAndRetain = ['source', 'wheelchair'];
-	        var keysToRetain = ['area'];
-	        var buildingKeysToRetain = ['architect', 'building', 'height', 'layer'];
-
-	        var extractedLoc = d3_geoCentroid(entity.asGeoJSON(graph));
-	        if (!extractedLoc  || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
-	            extractedLoc = entity.extent(graph).center();
-	        }
-
-	        var isBuilding = entity.tags.building && entity.tags.building !== 'no';
-
-	        var entityTags = Object.assign({}, entity.tags);  // shallow copy
-	        var pointTags = {};
-	        for (var key in entityTags) {
-
-	            if (entity.type === 'relation' &&
-	                key === 'type') {
-	                continue;
-	            }
-
-	            if (keysToRetain.indexOf(key) !== -1) {
-	                continue;
-	            }
-
-	            if (isBuilding) {
-	                // don't transfer building-related tags
-	                if (buildingKeysToRetain.indexOf(key) !== -1 ||
-	                    key.match(/^building:.{1,}/) ||
-	                    key.match(/^roof:.{1,}/)) { continue; }
-	            }
-
-	            // copy the tag from the entity to the point
-	            pointTags[key] = entityTags[key];
-
-	            // leave addresses and some other tags so they're on both features
-	            if (keysToCopyAndRetain.indexOf(key) !== -1 ||
-	                key.match(/^addr:.{1,}/)) {
-	                continue;
-	            }
-
-	            // remove the tag from the entity
-	            delete entityTags[key];
-	        }
-
-	        if (!isBuilding && fromGeometry === 'area') {
-	            // ensure that areas keep area geometry
-	            entityTags.area = 'yes';
-	        }
-
-	        var replacement = osmNode({ loc: extractedLoc, tags: pointTags });
-	        graph = graph.replace(replacement);
-
-	        extractedNodeID = replacement.id;
-
-	        return graph.replace(entity.update({tags: entityTags}));
-	    }
-
-	    action.getExtractedNodeID = function() {
-	        return extractedNodeID;
-	    };
-
-	    return action;
-	}
-
-	// Join ways at the end node they share.
-	//
-	// This is the inverse of `iD.actionSplit`.
-	//
-	// Reference:
-	//   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
-	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
-	//
-	function actionJoin(ids) {
-
-	    function groupEntitiesByGeometry(graph) {
-	        var entities = ids.map(function(id) { return graph.entity(id); });
-	        return Object.assign(
-	            { line: [] },
-	            utilArrayGroupBy(entities, function(entity) { return entity.geometry(graph); })
-	        );
-	    }
-
-
-	    var action = function(graph) {
-	        var ways = ids.map(graph.entity, graph);
-	        var survivorID = ways[0].id;
-
-	        // if any of the ways are sided (e.g. coastline, cliff, kerb)
-	        // sort them first so they establish the overall order - #6033
-	        ways.sort(function(a, b) {
-	            var aSided = a.isSided();
-	            var bSided = b.isSided();
-	            return (aSided && !bSided) ? -1
-	                : (bSided && !aSided) ? 1
-	                : 0;
-	        });
-
-	        // Prefer to keep an existing way.
-	        for (var i = 0; i < ways.length; i++) {
-	            if (!ways[i].isNew()) {
-	                survivorID = ways[i].id;
-	                break;
-	            }
-	        }
-
-	        var sequences = osmJoinWays(ways, graph);
-	        var joined = sequences[0];
-
-	        // We might need to reverse some of these ways before joining them.  #4688
-	        // `joined.actions` property will contain any actions we need to apply.
-	        graph = sequences.actions.reduce(function(g, action) { return action(g); }, graph);
-
-	        var survivor = graph.entity(survivorID);
-	        survivor = survivor.update({ nodes: joined.nodes.map(function(n) { return n.id; }) });
-	        graph = graph.replace(survivor);
-
-	        joined.forEach(function(way) {
-	            if (way.id === survivorID) { return; }
-
-	            graph.parentRelations(way).forEach(function(parent) {
-	                graph = graph.replace(parent.replaceMember(way, survivor));
-	            });
-
-	            survivor = survivor.mergeTags(way.tags);
-
-	            graph = graph.replace(survivor);
-	            graph = actionDeleteWay(way.id)(graph);
-	        });
-
-	        // Finds if the join created a single-member multipolygon,
-	        // and if so turns it into a basic area instead
-	        function checkForSimpleMultipolygon() {
-	            if (!survivor.isClosed()) { return; }
-
-	            var multipolygons = graph.parentMultipolygons(survivor).filter(function(multipolygon) {
-	                // find multipolygons where the survivor is the only member
-	                return multipolygon.members.length === 1;
-	            });
-
-	            // skip if this is the single member of multiple multipolygons
-	            if (multipolygons.length !== 1) { return; }
-
-	            var multipolygon = multipolygons[0];
-
-	            for (var key in survivor.tags) {
-	                if (multipolygon.tags[key] &&
-	                    // don't collapse if tags cannot be cleanly merged
-	                    multipolygon.tags[key] !== survivor.tags[key]) { return; }
-	            }
-
-	            survivor = survivor.mergeTags(multipolygon.tags);
-	            graph = graph.replace(survivor);
-	            graph = actionDeleteRelation(multipolygon.id, true /* allow untagged members */)(graph);
-
-	            var tags = Object.assign({}, survivor.tags);
-	            if (survivor.geometry(graph) !== 'area') {
-	                // ensure the feature persists as an area
-	                tags.area = 'yes';
-	            }
-	            delete tags.type; // remove type=multipolygon
-	            survivor = survivor.update({ tags: tags });
-	            graph = graph.replace(survivor);
-	        }
-	        checkForSimpleMultipolygon();
-
-	        return graph;
-	    };
-
-	    // Returns the number of nodes the resultant way is expected to have
-	    action.resultingWayNodesLength = function(graph) {
-	        return ids.reduce(function(count, id) {
-	            return count + graph.entity(id).nodes.length;
-	        }, 0) - ids.length - 1;
-	    };
-
-
-	    action.disabled = function(graph) {
-	        var geometries = groupEntitiesByGeometry(graph);
-	        if (ids.length < 2 || ids.length !== geometries.line.length) {
-	            return 'not_eligible';
-	        }
-
-	        var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
-	        if (joined.length > 1) {
-	            return 'not_adjacent';
-	        }
-
-	        // Loop through all combinations of path-pairs
-	        // to check potential intersections between all pairs
-	        for (var i = 0; i < ids.length - 1; i++) {
-	            for (var j = i + 1; j < ids.length; j++) {
-	                var path1 = graph.childNodes(graph.entity(ids[i]))
-	                    .map(function(e) { return e.loc; });
-	                var path2 = graph.childNodes(graph.entity(ids[j]))
-	                    .map(function(e) { return e.loc; });
-	                var intersections = geoPathIntersections(path1, path2);
-
-	                // Check if intersections are just nodes lying on top of
-	                // each other/the line, as opposed to crossing it
-	                var common = utilArrayIntersection(
-	                    joined[0].nodes.map(function(n) { return n.loc.toString(); }),
-	                    intersections.map(function(n) { return n.toString(); })
-	                );
-	                if (common.length !== intersections.length) {
-	                    return 'paths_intersect';
-	                }
-	            }
-	        }
-
-	        var nodeIds = joined[0].nodes.map(function(n) { return n.id; }).slice(1, -1);
-	        var relation;
-	        var tags = {};
-	        var conflicting = false;
-
-	        joined[0].forEach(function(way) {
-	            var parents = graph.parentRelations(way);
-	            parents.forEach(function(parent) {
-	                if (parent.isRestriction() && parent.members.some(function(m) { return nodeIds.indexOf(m.id) >= 0; })) {
-	                    relation = parent;
-	                }
-	            });
-
-	            for (var k in way.tags) {
-	                if (!(k in tags)) {
-	                    tags[k] = way.tags[k];
-	                } else if (tags[k] && osmIsInterestingTag(k) && tags[k] !== way.tags[k]) {
-	                    conflicting = true;
-	                }
-	            }
-	        });
-
-	        if (relation) {
-	            return 'restriction';
-	        }
-
-	        if (conflicting) {
-	            return 'conflicting_tags';
-	        }
-	    };
-
-
-	    return action;
-	}
-
-	function actionMerge(ids) {
-
-	    function groupEntitiesByGeometry(graph) {
-	        var entities = ids.map(function(id) { return graph.entity(id); });
-	        return Object.assign(
-	            { point: [], area: [], line: [], relation: [] },
-	            utilArrayGroupBy(entities, function(entity) { return entity.geometry(graph); })
-	        );
-	    }
-
-
-	    var action = function(graph) {
-	        var geometries = groupEntitiesByGeometry(graph);
-	        var target = geometries.area[0] || geometries.line[0];
-	        var points = geometries.point;
-
-	        points.forEach(function(point) {
-	            target = target.mergeTags(point.tags);
-	            graph = graph.replace(target);
-
-	            graph.parentRelations(point).forEach(function(parent) {
-	                graph = graph.replace(parent.replaceMember(point, target));
-	            });
-
-	            var nodes = utilArrayUniq(graph.childNodes(target));
-	            var removeNode = point;
-
-	            for (var i = 0; i < nodes.length; i++) {
-	                var node = nodes[i];
-	                if (graph.parentWays(node).length > 1 ||
-	                    graph.parentRelations(node).length ||
-	                    node.hasInterestingTags()) {
-	                    continue;
-	                }
-
-	                // Found an uninteresting child node on the target way.
-	                // Move orig point into its place to preserve point's history. #3683
-	                graph = graph.replace(point.update({ tags: {}, loc: node.loc }));
-	                target = target.replaceNode(node.id, point.id);
-	                graph = graph.replace(target);
-	                removeNode = node;
-	                break;
-	            }
-
-	            graph = graph.remove(removeNode);
-	        });
-
-	        if (target.tags.area === 'yes') {
-	            var tags = Object.assign({}, target.tags); // shallow copy
-	            delete tags.area;
-	            if (osmTagSuggestingArea(tags)) {
-	                // remove the `area` tag if area geometry is now implied - #3851
-	                target = target.update({ tags: tags });
-	                graph = graph.replace(target);
-	            }
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.disabled = function(graph) {
-	        var geometries = groupEntitiesByGeometry(graph);
-	        if (geometries.point.length === 0 ||
-	            (geometries.area.length + geometries.line.length) !== 1 ||
-	            geometries.relation.length !== 0) {
-	            return 'not_eligible';
-	        }
-	    };
-
-
-	    return action;
-	}
-
-	// `actionMergeNodes` is just a combination of:
-	//
-	// 1. move all the nodes to a common location
-	// 2. `actionConnect` them
-
-	function actionMergeNodes(nodeIDs, loc) {
-
-	    // If there is a single "interesting" node, use that as the location.
-	    // Otherwise return the average location of all the nodes.
-	    function chooseLoc(graph) {
-	        if (!nodeIDs.length) { return null; }
-	        var sum = [0,0];
-	        var interestingCount = 0;
-	        var interestingLoc;
-
-	        for (var i = 0; i < nodeIDs.length; i++) {
-	            var node = graph.entity(nodeIDs[i]);
-	            if (node.hasInterestingTags()) {
-	                interestingLoc = (++interestingCount === 1) ? node.loc : null;
-	            }
-	            sum = geoVecAdd(sum, node.loc);
-	        }
-
-	        return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
-	    }
-
-
-	    var action = function(graph) {
-	        if (nodeIDs.length < 2) { return graph; }
-	        var toLoc = loc;
-	        if (!toLoc) {
-	            toLoc = chooseLoc(graph);
-	        }
-
-	        for (var i = 0; i < nodeIDs.length; i++) {
-	            var node = graph.entity(nodeIDs[i]);
-	            if (node.loc !== toLoc) {
-	                graph = graph.replace(node.move(toLoc));
-	            }
-	        }
-
-	        return actionConnect(nodeIDs)(graph);
-	    };
-
-
-	    action.disabled = function(graph) {
-	        if (nodeIDs.length < 2) { return 'not_eligible'; }
-
-	        for (var i = 0; i < nodeIDs.length; i++) {
-	            var entity = graph.entity(nodeIDs[i]);
-	            if (entity.type !== 'node') { return 'not_eligible'; }
-	        }
-
-	        return actionConnect(nodeIDs).disabled(graph);
-	    };
-
-	    return action;
-	}
-
-	function osmChangeset() {
-	    if (!(this instanceof osmChangeset)) {
-	        return (new osmChangeset()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
-	    }
-	}
-
-
-	osmEntity.changeset = osmChangeset;
-
-	osmChangeset.prototype = Object.create(osmEntity.prototype);
-
-	Object.assign(osmChangeset.prototype, {
-
-	    type: 'changeset',
-
-
-	    extent: function() {
-	        return new geoExtent();
-	    },
-
-
-	    geometry: function() {
-	        return 'changeset';
-	    },
-
-
-	    asJXON: function() {
-	        return {
-	            osm: {
-	                changeset: {
-	                    tag: Object.keys(this.tags).map(function(k) {
-	                        return { '@k': k, '@v': this.tags[k] };
-	                    }, this),
-	                    '@version': 0.6,
-	                    '@generator': 'iD'
-	                }
-	            }
-	        };
-	    },
-
-
-	    // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
-	    // XML. Returns a string.
-	    osmChangeJXON: function(changes) {
-	        var changeset_id = this.id;
-
-	        function nest(x, order) {
-	            var groups = {};
-	            for (var i = 0; i < x.length; i++) {
-	                var tagName = Object.keys(x[i])[0];
-	                if (!groups[tagName]) { groups[tagName] = []; }
-	                groups[tagName].push(x[i][tagName]);
-	            }
-	            var ordered = {};
-	            order.forEach(function(o) {
-	                if (groups[o]) { ordered[o] = groups[o]; }
-	            });
-	            return ordered;
-	        }
-
-
-	        // sort relations in a changeset by dependencies
-	        function sort(changes) {
-
-	            // find a referenced relation in the current changeset
-	            function resolve(item) {
-	                return relations.find(function(relation) {
-	                    return item.keyAttributes.type === 'relation'
-	                        && item.keyAttributes.ref === relation['@id'];
-	                });
-	            }
-
-	            // a new item is an item that has not been already processed
-	            function isNew(item) {
-	                return !sorted[ item['@id'] ] && !processing.find(function(proc) {
-	                    return proc['@id'] === item['@id'];
-	                });
-	            }
-
-	            var processing = [];
-	            var sorted = {};
-	            var relations = changes.relation;
-
-	            if (!relations) { return changes; }
-
-	            for (var i = 0; i < relations.length; i++) {
-	                var relation = relations[i];
-
-	                // skip relation if already sorted
-	                if (!sorted[relation['@id']]) {
-	                    processing.push(relation);
-	                }
-
-	                while (processing.length > 0) {
-	                    var next = processing[0],
-	                    deps = next.member.map(resolve).filter(Boolean).filter(isNew);
-	                    if (deps.length === 0) {
-	                        sorted[next['@id']] = next;
-	                        processing.shift();
-	                    } else {
-	                        processing = deps.concat(processing);
-	                    }
-	                }
-	            }
-
-	            changes.relation = Object.values(sorted);
-	            return changes;
-	        }
-
-	        function rep(entity) {
-	            return entity.asJXON(changeset_id);
-	        }
-
-	        return {
-	            osmChange: {
-	                '@version': 0.6,
-	                '@generator': 'iD',
-	                'create': sort(nest(changes.created.map(rep), ['node', 'way', 'relation'])),
-	                'modify': nest(changes.modified.map(rep), ['node', 'way', 'relation']),
-	                'delete': Object.assign(nest(changes.deleted.map(rep), ['relation', 'way', 'node']), { '@if-unused': true })
-	            }
-	        };
-	    },
-
-
-	    asGeoJSON: function() {
-	        return {};
-	    }
-
-	});
-
-	function osmNote() {
-	    if (!(this instanceof osmNote)) {
-	        return (new osmNote()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
-	    }
-	}
-
-
-	osmNote.id = function() {
-	    return osmNote.id.next--;
-	};
-
-
-	osmNote.id.next = -1;
-
-
-	Object.assign(osmNote.prototype, {
-
-	    type: 'note',
-
-	    initialize: function(sources) {
-	        for (var i = 0; i < sources.length; ++i) {
-	            var source = sources[i];
-	            for (var prop in source) {
-	                if (Object.prototype.hasOwnProperty.call(source, prop)) {
-	                    if (source[prop] === undefined) {
-	                        delete this[prop];
-	                    } else {
-	                        this[prop] = source[prop];
-	                    }
-	                }
-	            }
-	        }
-
-	        if (!this.id) {
-	            this.id = osmNote.id() + '';  // as string
-	        }
-
-	        return this;
-	    },
-
-	    extent: function() {
-	        return new geoExtent(this.loc);
-	    },
-
-	    update: function(attrs) {
-	        return osmNote(this, attrs); // {v: 1 + (this.v || 0)}
-	    },
-
-	    isNew: function() {
-	        return this.id < 0;
-	    },
-
-	    move: function(loc) {
-	        return this.update({ loc: loc });
-	    }
-
-	});
-
-	function osmRelation() {
-	    if (!(this instanceof osmRelation)) {
-	        return (new osmRelation()).initialize(arguments);
-	    } else if (arguments.length) {
-	        this.initialize(arguments);
-	    }
-	}
-
-
-	osmEntity.relation = osmRelation;
-
-	osmRelation.prototype = Object.create(osmEntity.prototype);
-
-
-	osmRelation.creationOrder = function(a, b) {
-	    var aId = parseInt(osmEntity.id.toOSM(a.id), 10);
-	    var bId = parseInt(osmEntity.id.toOSM(b.id), 10);
-
-	    if (aId < 0 || bId < 0) { return aId - bId; }
-	    return bId - aId;
-	};
-
-
-	Object.assign(osmRelation.prototype, {
-	    type: 'relation',
-	    members: [],
-
-
-	    copy: function(resolver, copies) {
-	        if (copies[this.id]) { return copies[this.id]; }
-
-	        var copy = osmEntity.prototype.copy.call(this, resolver, copies);
-
-	        var members = this.members.map(function(member) {
-	            return Object.assign({}, member, { id: resolver.entity(member.id).copy(resolver, copies).id });
-	        });
-
-	        copy = copy.update({members: members});
-	        copies[this.id] = copy;
-
-	        return copy;
-	    },
-
-
-	    extent: function(resolver, memo) {
-	        return resolver.transient(this, 'extent', function() {
-	            if (memo && memo[this.id]) { return geoExtent(); }
-	            memo = memo || {};
-	            memo[this.id] = true;
-
-	            var extent = geoExtent();
-	            for (var i = 0; i < this.members.length; i++) {
-	                var member = resolver.hasEntity(this.members[i].id);
-	                if (member) {
-	                    extent._extend(member.extent(resolver, memo));
-	                }
-	            }
-	            return extent;
-	        });
-	    },
-
-
-	    geometry: function(graph) {
-	        return graph.transient(this, 'geometry', function() {
-	            return this.isMultipolygon() ? 'area' : 'relation';
-	        });
-	    },
-
-
-	    isDegenerate: function() {
-	        return this.members.length === 0;
-	    },
-
-
-	    // Return an array of members, each extended with an 'index' property whose value
-	    // is the member index.
-	    indexedMembers: function() {
-	        var result = new Array(this.members.length);
-	        for (var i = 0; i < this.members.length; i++) {
-	            result[i] = Object.assign({}, this.members[i], {index: i});
-	        }
-	        return result;
-	    },
-
-
-	    // Return the first member with the given role. A copy of the member object
-	    // is returned, extended with an 'index' property whose value is the member index.
-	    memberByRole: function(role) {
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (this.members[i].role === role) {
-	                return Object.assign({}, this.members[i], {index: i});
-	            }
-	        }
-	    },
-
-	    // Same as memberByRole, but returns all members with the given role
-	    membersByRole: function(role) {
-	        var result = [];
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (this.members[i].role === role) {
-	                result.push(Object.assign({}, this.members[i], {index: i}));
-	            }
-	        }
-	        return result;
-	    },
-
-	    // Return the first member with the given id. A copy of the member object
-	    // is returned, extended with an 'index' property whose value is the member index.
-	    memberById: function(id) {
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (this.members[i].id === id) {
-	                return Object.assign({}, this.members[i], {index: i});
-	            }
-	        }
-	    },
-
-
-	    // Return the first member with the given id and role. A copy of the member object
-	    // is returned, extended with an 'index' property whose value is the member index.
-	    memberByIdAndRole: function(id, role) {
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (this.members[i].id === id && this.members[i].role === role) {
-	                return Object.assign({}, this.members[i], {index: i});
-	            }
-	        }
-	    },
-
-
-	    addMember: function(member, index) {
-	        var members = this.members.slice();
-	        members.splice(index === undefined ? members.length : index, 0, member);
-	        return this.update({members: members});
-	    },
-
-
-	    updateMember: function(member, index) {
-	        var members = this.members.slice();
-	        members.splice(index, 1, Object.assign({}, members[index], member));
-	        return this.update({members: members});
-	    },
-
-
-	    removeMember: function(index) {
-	        var members = this.members.slice();
-	        members.splice(index, 1);
-	        return this.update({members: members});
-	    },
-
-
-	    removeMembersWithID: function(id) {
-	        var members = this.members.filter(function(m) { return m.id !== id; });
-	        return this.update({members: members});
-	    },
-
-	    moveMember: function(fromIndex, toIndex) {
-	        var members = this.members.slice();
-	        members.splice(toIndex, 0, members.splice(fromIndex, 1)[0]);
-	        return this.update({members: members});
-	    },
-
-
-	    // Wherever a member appears with id `needle.id`, replace it with a member
-	    // with id `replacement.id`, type `replacement.type`, and the original role,
-	    // By default, adding a duplicate member (by id and role) is prevented.
-	    // Return an updated relation.
-	    replaceMember: function(needle, replacement, keepDuplicates) {
-	        if (!this.memberById(needle.id)) { return this; }
-
-	        var members = [];
-
-	        for (var i = 0; i < this.members.length; i++) {
-	            var member = this.members[i];
-	            if (member.id !== needle.id) {
-	                members.push(member);
-	            } else if (keepDuplicates || !this.memberByIdAndRole(replacement.id, member.role)) {
-	                members.push({ id: replacement.id, type: replacement.type, role: member.role });
-	            }
-	        }
-
-	        return this.update({ members: members });
-	    },
-
-
-	    asJXON: function(changeset_id) {
-	        var r = {
-	            relation: {
-	                '@id': this.osmId(),
-	                '@version': this.version || 0,
-	                member: this.members.map(function(member) {
-	                    return {
-	                        keyAttributes: {
-	                            type: member.type,
-	                            role: member.role,
-	                            ref: osmEntity.id.toOSM(member.id)
-	                        }
-	                    };
-	                }, this),
-	                tag: Object.keys(this.tags).map(function(k) {
-	                    return { keyAttributes: { k: k, v: this.tags[k] } };
-	                }, this)
-	            }
-	        };
-	        if (changeset_id) {
-	            r.relation['@changeset'] = changeset_id;
-	        }
-	        return r;
-	    },
-
-
-	    asGeoJSON: function(resolver) {
-	        return resolver.transient(this, 'GeoJSON', function () {
-	            if (this.isMultipolygon()) {
-	                return {
-	                    type: 'MultiPolygon',
-	                    coordinates: this.multipolygon(resolver)
-	                };
-	            } else {
-	                return {
-	                    type: 'FeatureCollection',
-	                    properties: this.tags,
-	                    features: this.members.map(function (member) {
-	                        return Object.assign({role: member.role}, resolver.entity(member.id).asGeoJSON(resolver));
-	                    })
-	                };
-	            }
-	        });
-	    },
-
-
-	    area: function(resolver) {
-	        return resolver.transient(this, 'area', function() {
-	            return d3_geoArea(this.asGeoJSON(resolver));
-	        });
-	    },
-
-
-	    isMultipolygon: function() {
-	        return this.tags.type === 'multipolygon';
-	    },
-
-
-	    isComplete: function(resolver) {
-	        for (var i = 0; i < this.members.length; i++) {
-	            if (!resolver.hasEntity(this.members[i].id)) {
-	                return false;
-	            }
-	        }
-	        return true;
-	    },
-
-
-	    hasFromViaTo: function() {
-	        return (
-	            this.members.some(function(m) { return m.role === 'from'; }) &&
-	            this.members.some(function(m) { return m.role === 'via'; }) &&
-	            this.members.some(function(m) { return m.role === 'to'; })
-	        );
-	    },
-
-
-	    isRestriction: function() {
-	        return !!(this.tags.type && this.tags.type.match(/^restriction:?/));
-	    },
-
-
-	    isValidRestriction: function() {
-	        if (!this.isRestriction()) { return false; }
-
-	        var froms = this.members.filter(function(m) { return m.role === 'from'; });
-	        var vias = this.members.filter(function(m) { return m.role === 'via'; });
-	        var tos = this.members.filter(function(m) { return m.role === 'to'; });
-
-	        if (froms.length !== 1 && this.tags.restriction !== 'no_entry') { return false; }
-	        if (froms.some(function(m) { return m.type !== 'way'; })) { return false; }
-
-	        if (tos.length !== 1 && this.tags.restriction !== 'no_exit') { return false; }
-	        if (tos.some(function(m) { return m.type !== 'way'; })) { return false; }
-
-	        if (vias.length === 0) { return false; }
-	        if (vias.length > 1 && vias.some(function(m) { return m.type !== 'way'; })) { return false; }
-
-	        return true;
-	    },
-
-
-	    // Returns an array [A0, ... An], each Ai being an array of node arrays [Nds0, ... Ndsm],
-	    // where Nds0 is an outer ring and subsequent Ndsi's (if any i > 0) being inner rings.
-	    //
-	    // This corresponds to the structure needed for rendering a multipolygon path using a
-	    // `evenodd` fill rule, as well as the structure of a GeoJSON MultiPolygon geometry.
-	    //
-	    // In the case of invalid geometries, this function will still return a result which
-	    // includes the nodes of all way members, but some Nds may be unclosed and some inner
-	    // rings not matched with the intended outer ring.
-	    //
-	    multipolygon: function(resolver) {
-	        var outers = this.members.filter(function(m) { return 'outer' === (m.role || 'outer'); });
-	        var inners = this.members.filter(function(m) { return 'inner' === m.role; });
-
-	        outers = osmJoinWays(outers, resolver);
-	        inners = osmJoinWays(inners, resolver);
-
-	        var sequenceToLineString = function(sequence) {
-	            if (sequence.nodes.length > 2 &&
-	                sequence.nodes[0] !== sequence.nodes[sequence.nodes.length - 1]) {
-	                // close unclosed parts to ensure correct area rendering - #2945
-	                sequence.nodes.push(sequence.nodes[0]);
-	            }
-	            return sequence.nodes.map(function(node) { return node.loc; });
-	        };
-
-	        outers = outers.map(sequenceToLineString);
-	        inners = inners.map(sequenceToLineString);
-
-	        var result = outers.map(function(o) {
-	            // Heuristic for detecting counterclockwise winding order. Assumes
-	            // that OpenStreetMap polygons are not hemisphere-spanning.
-	            return [d3_geoArea({ type: 'Polygon', coordinates: [o] }) > 2 * Math.PI ? o.reverse() : o];
-	        });
-
-	        function findOuter(inner) {
-	            var o, outer;
-
-	            for (o = 0; o < outers.length; o++) {
-	                outer = outers[o];
-	                if (geoPolygonContainsPolygon(outer, inner))
-	                    { return o; }
-	            }
-
-	            for (o = 0; o < outers.length; o++) {
-	                outer = outers[o];
-	                if (geoPolygonIntersectsPolygon(outer, inner, false))
-	                    { return o; }
-	            }
-	        }
-
-	        for (var i = 0; i < inners.length; i++) {
-	            var inner = inners[i];
-
-	            if (d3_geoArea({ type: 'Polygon', coordinates: [inner] }) < 2 * Math.PI) {
-	                inner = inner.reverse();
-	            }
-
-	            var o = findOuter(inners[i]);
-	            if (o !== undefined) {
-	                result[o].push(inners[i]);
-	            } else {
-	                result.push([inners[i]]); // Invalid geometry
-	            }
-	        }
-
-	        return result;
-	    }
-	});
-
-	var QAItem = function QAItem(loc, service, itemType, id, props) {
-	  // Store required properties
-	  this.loc = loc;
-	  this.service = service.title;
-	  this.itemType = itemType;
-
-	  // All issues must have an ID for selection, use generic if none specified
-	  this.id = id ? id : ("" + (QAItem.id()));
-
-	  this.update(props);
-
-	  // Some QA services have marker icons to differentiate issues
-	  if (service && typeof service.getIcon === 'function') {
-	    this.icon = service.getIcon(itemType);
-	  }
-
-	  return this;
-	};
-
-	QAItem.prototype.update = function update (props) {
-	    var this$1 = this;
-
-	  // You can't override this inital information
-	  var ref = this;
-	    var loc = ref.loc;
-	    var service = ref.service;
-	    var itemType = ref.itemType;
-	    var id = ref.id;
-
-	  Object.keys(props).forEach(function (prop) { return this$1[prop] = props[prop]; });
-
-	  this.loc = loc;
-	  this.service = service;
-	  this.itemType = itemType;
-	  this.id = id;
-
-	  return this;
-	};
-
-	// Generic handling for newly created QAItems
-	QAItem.id = function id () {
-	  return this.nextId--;
-	};
-	QAItem.nextId = -1;
-
-	// Split a way at the given node.
-	//
-	// Optionally, split only the given ways, if multiple ways share
-	// the given node.
-	//
-	// This is the inverse of `iD.actionJoin`.
-	//
-	// For testing convenience, accepts an ID to assign to the new way.
-	// Normally, this will be undefined and the way will automatically
-	// be assigned a new ID.
-	//
-	// Reference:
-	//   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/SplitWayAction.as
-	//
-	function actionSplit(nodeId, newWayIds) {
-	    var _wayIDs;
-
-	    // The IDs of the ways actually created by running this action
-	    var createdWayIDs = [];
-
-	    // If the way is closed, we need to search for a partner node
-	    // to split the way at.
-	    //
-	    // The following looks for a node that is both far away from
-	    // the initial node in terms of way segment length and nearby
-	    // in terms of beeline-distance. This assures that areas get
-	    // split on the most "natural" points (independent of the number
-	    // of nodes).
-	    // For example: bone-shaped areas get split across their waist
-	    // line, circles across the diameter.
-	    function splitArea(nodes, idxA, graph) {
-	        var lengths = new Array(nodes.length);
-	        var length;
-	        var i;
-	        var best = 0;
-	        var idxB;
-
-	        function wrap(index) {
-	            return utilWrap(index, nodes.length);
-	        }
-
-	        function dist(nA, nB) {
-	            var locA = graph.entity(nA).loc;
-	            var locB = graph.entity(nB).loc;
-	            var epsilon = 1e-6;
-	            return (locA && locB) ? geoSphericalDistance(locA, locB) : epsilon;
-	        }
-
-	        // calculate lengths
-	        length = 0;
-	        for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
-	            length += dist(nodes[i], nodes[wrap(i - 1)]);
-	            lengths[i] = length;
-	        }
-
-	        length = 0;
-	        for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
-	            length += dist(nodes[i], nodes[wrap(i + 1)]);
-	            if (length < lengths[i]) {
-	                lengths[i] = length;
-	            }
-	        }
-
-	        // determine best opposite node to split
-	        for (i = 0; i < nodes.length; i++) {
-	            var cost = lengths[i] / dist(nodes[idxA], nodes[i]);
-	            if (cost > best) {
-	                idxB = i;
-	                best = cost;
-	            }
-	        }
-
-	        return idxB;
-	    }
-
-
-	    function split(graph, wayA, newWayId) {
-	        var wayB = osmWay({ id: newWayId, tags: wayA.tags });   // `wayB` is the NEW way
-	        var origNodes = wayA.nodes.slice();
-	        var nodesA;
-	        var nodesB;
-	        var isArea = wayA.isArea();
-	        var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
-
-	        if (wayA.isClosed()) {
-	            var nodes = wayA.nodes.slice(0, -1);
-	            var idxA = nodes.indexOf(nodeId);
-	            var idxB = splitArea(nodes, idxA, graph);
-
-	            if (idxB < idxA) {
-	                nodesA = nodes.slice(idxA).concat(nodes.slice(0, idxB + 1));
-	                nodesB = nodes.slice(idxB, idxA + 1);
-	            } else {
-	                nodesA = nodes.slice(idxA, idxB + 1);
-	                nodesB = nodes.slice(idxB).concat(nodes.slice(0, idxA + 1));
-	            }
-	        } else {
-	            var idx = wayA.nodes.indexOf(nodeId, 1);
-	            nodesA = wayA.nodes.slice(0, idx + 1);
-	            nodesB = wayA.nodes.slice(idx);
-	        }
-
-	        wayA = wayA.update({ nodes: nodesA });
-	        wayB = wayB.update({ nodes: nodesB });
-
-	        graph = graph.replace(wayA);
-	        graph = graph.replace(wayB);
-
-	        graph.parentRelations(wayA).forEach(function(relation) {
-	            var member;
-
-	            // Turn restrictions - make sure:
-	            // 1. Splitting a FROM/TO way - only `wayA` OR `wayB` remains in relation
-	            //    (whichever one is connected to the VIA node/ways)
-	            // 2. Splitting a VIA way - `wayB` remains in relation as a VIA way
-	            if (relation.hasFromViaTo()) {
-	                var f = relation.memberByRole('from');
-	                var v = relation.membersByRole('via');
-	                var t = relation.memberByRole('to');
-	                var i;
-
-	                // 1. split a FROM/TO
-	                if (f.id === wayA.id || t.id === wayA.id) {
-	                    var keepB = false;
-	                    if (v.length === 1 && v[0].type === 'node') {   // check via node
-	                        keepB = wayB.contains(v[0].id);
-	                    } else {                                        // check via way(s)
-	                        for (i = 0; i < v.length; i++) {
-	                            if (v[i].type === 'way') {
-	                                var wayVia = graph.hasEntity(v[i].id);
-	                                if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
-	                                    keepB = true;
-	                                    break;
-	                                }
-	                            }
-	                        }
-	                    }
-
-	                    if (keepB) {
-	                        relation = relation.replaceMember(wayA, wayB);
-	                        graph = graph.replace(relation);
-	                    }
-
-	                // 2. split a VIA
-	                } else {
-	                    for (i = 0; i < v.length; i++) {
-	                        if (v[i].type === 'way' && v[i].id === wayA.id) {
-	                            member = {
-	                                id: wayB.id,
-	                                type: 'way',
-	                                role: 'via'
-	                            };
-	                            graph = actionAddMember(relation.id, member, v[i].index + 1)(graph);
-	                            break;
-	                        }
-	                    }
-	                }
-
-	            // All other relations (Routes, Multipolygons, etc):
-	            // 1. Both `wayA` and `wayB` remain in the relation
-	            // 2. But must be inserted as a pair (see `actionAddMember` for details)
-	            } else {
-	                if (relation === isOuter) {
-	                    graph = graph.replace(relation.mergeTags(wayA.tags));
-	                    graph = graph.replace(wayA.update({ tags: {} }));
-	                    graph = graph.replace(wayB.update({ tags: {} }));
-	                }
-
-	                member = {
-	                    id: wayB.id,
-	                    type: 'way',
-	                    role: relation.memberById(wayA.id).role
-	                };
-
-	                var insertPair = {
-	                    originalID: wayA.id,
-	                    insertedID: wayB.id,
-	                    nodes: origNodes
-	                };
-
-	                graph = actionAddMember(relation.id, member, undefined, insertPair)(graph);
-	            }
-	        });
-
-	        if (!isOuter && isArea) {
-	            var multipolygon = osmRelation({
-	                tags: Object.assign({}, wayA.tags, { type: 'multipolygon' }),
-	                members: [
-	                    { id: wayA.id, role: 'outer', type: 'way' },
-	                    { id: wayB.id, role: 'outer', type: 'way' }
-	                ]
-	            });
-
-	            graph = graph.replace(multipolygon);
-	            graph = graph.replace(wayA.update({ tags: {} }));
-	            graph = graph.replace(wayB.update({ tags: {} }));
-	        }
-
-	        createdWayIDs.push(wayB.id);
-
-	        return graph;
-	    }
-
-	    var action = function(graph) {
-	        var candidates = action.ways(graph);
-	        createdWayIDs = [];
-	        for (var i = 0; i < candidates.length; i++) {
-	            graph = split(graph, candidates[i], newWayIds && newWayIds[i]);
-	        }
-	        return graph;
-	    };
-
-	    action.getCreatedWayIDs = function() {
-	        return createdWayIDs;
-	    };
-
-	    action.ways = function(graph) {
-	        var node = graph.entity(nodeId);
-	        var parents = graph.parentWays(node);
-	        var hasLines = parents.some(function(parent) {
-	            return parent.geometry(graph) === 'line';
-	        });
-
-	        return parents.filter(function(parent) {
-	            if (_wayIDs && _wayIDs.indexOf(parent.id) === -1)
-	                { return false; }
-
-	            if (!_wayIDs && hasLines && parent.geometry(graph) !== 'line')
-	                { return false; }
-
-	            if (parent.isClosed()) {
-	                return true;
-	            }
-
-	            for (var i = 1; i < parent.nodes.length - 1; i++) {
-	                if (parent.nodes[i] === nodeId) {
-	                    return true;
-	                }
-	            }
-
-	            return false;
-	        });
-	    };
-
-
-	    action.disabled = function(graph) {
-	        var candidates = action.ways(graph);
-	        if (candidates.length === 0 || (_wayIDs && _wayIDs.length !== candidates.length)) {
-	            return 'not_eligible';
-	        }
-	    };
-
-
-	    action.limitWays = function(val) {
-	        if (!arguments.length) { return _wayIDs; }
-	        _wayIDs = val;
-	        return action;
-	    };
-
-
-	    return action;
-	}
-
-	function coreGraph(other, mutable) {
-	    if (!(this instanceof coreGraph)) { return new coreGraph(other, mutable); }
-
-	    if (other instanceof coreGraph) {
-	        var base = other.base();
-	        this.entities = Object.assign(Object.create(base.entities), other.entities);
-	        this._parentWays = Object.assign(Object.create(base.parentWays), other._parentWays);
-	        this._parentRels = Object.assign(Object.create(base.parentRels), other._parentRels);
-
-	    } else {
-	        this.entities = Object.create({});
-	        this._parentWays = Object.create({});
-	        this._parentRels = Object.create({});
-	        this.rebase(other || [], [this]);
-	    }
-
-	    this.transients = {};
-	    this._childNodes = {};
-	    this.frozen = !mutable;
-	}
-
-
-	coreGraph.prototype = {
-
-	    hasEntity: function(id) {
-	        return this.entities[id];
-	    },
-
-
-	    entity: function(id) {
-	        var entity = this.entities[id];
-
-	        //https://github.com/openstreetmap/iD/issues/3973#issuecomment-307052376
-	        if (!entity) {
-	            entity = this.entities.__proto__[id];  // eslint-disable-line no-proto
-	        }
-
-	        if (!entity) {
-	            throw new Error('entity ' + id + ' not found');
-	        }
-	        return entity;
-	    },
-
-
-	    geometry: function(id) {
-	        return this.entity(id).geometry(this);
-	    },
-
-
-	    transient: function(entity, key, fn) {
-	        var id = entity.id;
-	        var transients = this.transients[id] || (this.transients[id] = {});
-
-	        if (transients[key] !== undefined) {
-	            return transients[key];
-	        }
-
-	        transients[key] = fn.call(entity);
-
-	        return transients[key];
-	    },
-
-
-	    parentWays: function(entity) {
-	        var parents = this._parentWays[entity.id];
-	        var result = [];
-	        if (parents) {
-	            parents.forEach(function(id) {
-	                result.push(this.entity(id));
-	            }, this);
-	        }
-	        return result;
-	    },
-
-
-	    isPoi: function(entity) {
-	        var parents = this._parentWays[entity.id];
-	        return !parents || parents.size === 0;
-	    },
-
-
-	    isShared: function(entity) {
-	        var parents = this._parentWays[entity.id];
-	        return parents && parents.size > 1;
-	    },
-
-
-	    parentRelations: function(entity) {
-	        var parents = this._parentRels[entity.id];
-	        var result = [];
-	        if (parents) {
-	            parents.forEach(function(id) {
-	                result.push(this.entity(id));
-	            }, this);
-	        }
-	        return result;
-	    },
-
-	    parentMultipolygons: function(entity) {
-	        return this.parentRelations(entity).filter(function(relation) {
-	            return relation.isMultipolygon();
-	        });
-	    },
-
-
-	    childNodes: function(entity) {
-	        if (this._childNodes[entity.id]) { return this._childNodes[entity.id]; }
-	        if (!entity.nodes) { return []; }
-
-	        var nodes = [];
-	        for (var i = 0; i < entity.nodes.length; i++) {
-	            nodes[i] = this.entity(entity.nodes[i]);
-	        }
-
-	        this._childNodes[entity.id] = nodes;
-	        return this._childNodes[entity.id];
-	    },
-
-
-	    base: function() {
-	        return {
-	            'entities': Object.getPrototypeOf(this.entities),
-	            'parentWays': Object.getPrototypeOf(this._parentWays),
-	            'parentRels': Object.getPrototypeOf(this._parentRels)
-	        };
-	    },
-
-
-	    // Unlike other graph methods, rebase mutates in place. This is because it
-	    // is used only during the history operation that merges newly downloaded
-	    // data into each state. To external consumers, it should appear as if the
-	    // graph always contained the newly downloaded data.
-	    rebase: function(entities, stack, force) {
-	        var base = this.base();
-	        var i, j, k, id;
-
-	        for (i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-
-	            if (!entity.visible || (!force && base.entities[entity.id]))
-	                { continue; }
-
-	            // Merging data into the base graph
-	            base.entities[entity.id] = entity;
-	            this._updateCalculated(undefined, entity, base.parentWays, base.parentRels);
-
-	            // Restore provisionally-deleted nodes that are discovered to have an extant parent
-	            if (entity.type === 'way') {
-	                for (j = 0; j < entity.nodes.length; j++) {
-	                    id = entity.nodes[j];
-	                    for (k = 1; k < stack.length; k++) {
-	                        var ents = stack[k].entities;
-	                        if (ents.hasOwnProperty(id) && ents[id] === undefined) {
-	                            delete ents[id];
-	                        }
-	                    }
-	                }
-	            }
-	        }
-
-	        for (i = 0; i < stack.length; i++) {
-	            stack[i]._updateRebased();
-	        }
-	    },
-
-
-	    _updateRebased: function() {
-	        var base = this.base();
-
-	        Object.keys(this._parentWays).forEach(function(child) {
-	            if (base.parentWays[child]) {
-	                base.parentWays[child].forEach(function(id) {
-	                    if (!this.entities.hasOwnProperty(id)) {
-	                        this._parentWays[child].add(id);
-	                    }
-	                }, this);
-	            }
-	        }, this);
-
-	        Object.keys(this._parentRels).forEach(function(child) {
-	            if (base.parentRels[child]) {
-	                base.parentRels[child].forEach(function(id) {
-	                    if (!this.entities.hasOwnProperty(id)) {
-	                        this._parentRels[child].add(id);
-	                    }
-	                }, this);
-	            }
-	        }, this);
-
-	        this.transients = {};
-
-	        // this._childNodes is not updated, under the assumption that
-	        // ways are always downloaded with their child nodes.
-	    },
-
-
-	    // Updates calculated properties (parentWays, parentRels) for the specified change
-	    _updateCalculated: function(oldentity, entity, parentWays, parentRels) {
-	        parentWays = parentWays || this._parentWays;
-	        parentRels = parentRels || this._parentRels;
-
-	        var type = entity && entity.type || oldentity && oldentity.type;
-	        var removed, added, i;
-
-	        if (type === 'way') {   // Update parentWays
-	            if (oldentity && entity) {
-	                removed = utilArrayDifference(oldentity.nodes, entity.nodes);
-	                added = utilArrayDifference(entity.nodes, oldentity.nodes);
-	            } else if (oldentity) {
-	                removed = oldentity.nodes;
-	                added = [];
-	            } else if (entity) {
-	                removed = [];
-	                added = entity.nodes;
-	            }
-	            for (i = 0; i < removed.length; i++) {
-	                // make a copy of prototype property, store as own property, and update..
-	                parentWays[removed[i]] = new Set(parentWays[removed[i]]);
-	                parentWays[removed[i]].delete(oldentity.id);
-	            }
-	            for (i = 0; i < added.length; i++) {
-	                // make a copy of prototype property, store as own property, and update..
-	                parentWays[added[i]] = new Set(parentWays[added[i]]);
-	                parentWays[added[i]].add(entity.id);
-	            }
-
-	        } else if (type === 'relation') {   // Update parentRels
-
-	            // diff only on the IDs since the same entity can be a member multiple times with different roles
-	            var oldentityMemberIDs = oldentity ? oldentity.members.map(function(m) { return m.id; }) : [];
-	            var entityMemberIDs = entity ? entity.members.map(function(m) { return m.id; }) : [];
-
-	            if (oldentity && entity) {
-	                removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
-	                added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
-	            } else if (oldentity) {
-	                removed = oldentityMemberIDs;
-	                added = [];
-	            } else if (entity) {
-	                removed = [];
-	                added = entityMemberIDs;
-	            }
-	            for (i = 0; i < removed.length; i++) {
-	                // make a copy of prototype property, store as own property, and update..
-	                parentRels[removed[i]] = new Set(parentRels[removed[i]]);
-	                parentRels[removed[i]].delete(oldentity.id);
-	            }
-	            for (i = 0; i < added.length; i++) {
-	                // make a copy of prototype property, store as own property, and update..
-	                parentRels[added[i]] = new Set(parentRels[added[i]]);
-	                parentRels[added[i]].add(entity.id);
-	            }
-	        }
-	    },
-
-
-	    replace: function(entity) {
-	        if (this.entities[entity.id] === entity) { return this; }
-
-	        return this.update(function() {
-	            this._updateCalculated(this.entities[entity.id], entity);
-	            this.entities[entity.id] = entity;
-	        });
-	    },
-
-
-	    remove: function(entity) {
-	        return this.update(function() {
-	            this._updateCalculated(entity, undefined);
-	            this.entities[entity.id] = undefined;
-	        });
-	    },
-
-
-	    revert: function(id) {
-	        var baseEntity = this.base().entities[id];
-	        var headEntity = this.entities[id];
-	        if (headEntity === baseEntity) { return this; }
-
-	        return this.update(function() {
-	            this._updateCalculated(headEntity, baseEntity);
-	            delete this.entities[id];
-	        });
-	    },
-
-
-	    update: function() {
-	        var arguments$1 = arguments;
-
-	        var graph = this.frozen ? coreGraph(this, true) : this;
-	        for (var i = 0; i < arguments.length; i++) {
-	            arguments$1[i].call(graph, graph);
-	        }
-
-	        if (this.frozen) { graph.frozen = true; }
-
-	        return graph;
-	    },
-
-
-	    // Obliterates any existing entities
-	    load: function(entities) {
-	        var base = this.base();
-	        this.entities = Object.create(base.entities);
-
-	        for (var i in entities) {
-	            this.entities[i] = entities[i];
-	            this._updateCalculated(base.entities[i], this.entities[i]);
-	        }
-
-	        return this;
-	    }
-	};
-
-	function osmTurn(turn) {
-	    if (!(this instanceof osmTurn)) {
-	        return new osmTurn(turn);
-	    }
-	    Object.assign(this, turn);
-	}
-
-
-	function osmIntersection(graph, startVertexId, maxDistance) {
-	    maxDistance = maxDistance || 30;    // in meters
-	    var vgraph = coreGraph();           // virtual graph
-	    var i, j, k;
-
-
-	    function memberOfRestriction(entity) {
-	        return graph.parentRelations(entity)
-	            .some(function(r) { return r.isRestriction(); });
-	    }
-
-	    function isRoad(way) {
-	        if (way.isArea() || way.isDegenerate()) { return false; }
-	        var roads = {
-	            'motorway': true,
-	            'motorway_link': true,
-	            'trunk': true,
-	            'trunk_link': true,
-	            'primary': true,
-	            'primary_link': true,
-	            'secondary': true,
-	            'secondary_link': true,
-	            'tertiary': true,
-	            'tertiary_link': true,
-	            'residential': true,
-	            'unclassified': true,
-	            'living_street': true,
-	            'service': true,
-	            'road': true,
-	            'track': true
-	        };
-	        return roads[way.tags.highway];
-	    }
-
-
-	    var startNode = graph.entity(startVertexId);
-	    var checkVertices = [startNode];
-	    var checkWays;
-	    var vertices = [];
-	    var vertexIds = [];
-	    var vertex;
-	    var ways = [];
-	    var wayIds = [];
-	    var way;
-	    var nodes = [];
-	    var node;
-	    var parents = [];
-	    var parent;
-
-	    // `actions` will store whatever actions must be performed to satisfy
-	    // preconditions for adding a turn restriction to this intersection.
-	    //  - Remove any existing degenerate turn restrictions (missing from/to, etc)
-	    //  - Reverse oneways so that they are drawn in the forward direction
-	    //  - Split ways on key vertices
-	    var actions = [];
-
-
-	    // STEP 1:  walk the graph outwards from starting vertex to search
-	    //  for more key vertices and ways to include in the intersection..
-
-	    while (checkVertices.length) {
-	        vertex = checkVertices.pop();
-
-	        // check this vertex for parent ways that are roads
-	        checkWays = graph.parentWays(vertex);
-	        var hasWays = false;
-	        for (i = 0; i < checkWays.length; i++) {
-	            way = checkWays[i];
-	            if (!isRoad(way) && !memberOfRestriction(way)) { continue; }
-
-	            ways.push(way);   // it's a road, or it's already in a turn restriction
-	            hasWays = true;
-
-	            // check the way's children for more key vertices
-	            nodes = utilArrayUniq(graph.childNodes(way));
-	            for (j = 0; j < nodes.length; j++) {
-	                node = nodes[j];
-	                if (node === vertex) { continue; }                                           // same thing
-	                if (vertices.indexOf(node) !== -1) { continue; }                             // seen it already
-	                if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) { continue; }   // too far from start
-
-	                // a key vertex will have parents that are also roads
-	                var hasParents = false;
-	                parents = graph.parentWays(node);
-	                for (k = 0; k < parents.length; k++) {
-	                    parent = parents[k];
-	                    if (parent === way) { continue; }                 // same thing
-	                    if (ways.indexOf(parent) !== -1) { continue; }    // seen it already
-	                    if (!isRoad(parent)) { continue; }                // not a road
-	                    hasParents = true;
-	                    break;
-	                }
-
-	                if (hasParents) {
-	                    checkVertices.push(node);
-	                }
-	            }
-	        }
-
-	        if (hasWays) {
-	            vertices.push(vertex);
-	        }
-	    }
-
-	    vertices = utilArrayUniq(vertices);
-	    ways = utilArrayUniq(ways);
-
-
-	    // STEP 2:  Build a virtual graph containing only the entities in the intersection..
-	    // Everything done after this step should act on the virtual graph
-	    // Any actions that must be performed later to the main graph go in `actions` array
-	    ways.forEach(function(way) {
-	        graph.childNodes(way).forEach(function(node) {
-	            vgraph = vgraph.replace(node);
-	        });
-
-	        vgraph = vgraph.replace(way);
-
-	        graph.parentRelations(way).forEach(function(relation) {
-	            if (relation.isRestriction()) {
-	                if (relation.isValidRestriction(graph)) {
-	                    vgraph = vgraph.replace(relation);
-	                } else if (relation.isComplete(graph)) {
-	                    actions.push(actionDeleteRelation(relation.id));
-	                }
-	            }
-	        });
-	    });
-
-
-	    // STEP 3:  Force all oneways to be drawn in the forward direction
-	    ways.forEach(function(w) {
-	        var way = vgraph.entity(w.id);
-	        if (way.tags.oneway === '-1') {
-	            var action = actionReverse(way.id, { reverseOneway: true });
-	            actions.push(action);
-	            vgraph = action(vgraph);
-	        }
-	    });
-
-
-	    // STEP 4:  Split ways on key vertices
-	    var origCount = osmEntity.id.next.way;
-	    vertices.forEach(function(v) {
-	        // This is an odd way to do it, but we need to find all the ways that
-	        // will be split here, then split them one at a time to ensure that these
-	        // actions can be replayed on the main graph exactly in the same order.
-	        // (It is unintuitive, but the order of ways returned from graph.parentWays()
-	        // is arbitrary, depending on how the main graph and vgraph were built)
-	        var splitAll = actionSplit(v.id);
-	        if (!splitAll.disabled(vgraph)) {
-	            splitAll.ways(vgraph).forEach(function(way) {
-	                var splitOne = actionSplit(v.id).limitWays([way.id]);
-	                actions.push(splitOne);
-	                vgraph = splitOne(vgraph);
-	            });
-	        }
-	    });
-
-	    // In here is where we should also split the intersection at nearby junction.
-	    //   for https://github.com/mapbox/iD-internal/issues/31
-	    // nearbyVertices.forEach(function(v) {
-	    // });
-
-	    // Reasons why we reset the way id count here:
-	    //  1. Continuity with way ids created by the splits so that we can replay
-	    //     these actions later if the user decides to create a turn restriction
-	    //  2. Avoids churning way ids just by hovering over a vertex
-	    //     and displaying the turn restriction editor
-	    osmEntity.id.next.way = origCount;
-
-
-	    // STEP 5:  Update arrays to point to vgraph entities
-	    vertexIds = vertices.map(function(v) { return v.id; });
-	    vertices = [];
-	    ways = [];
-
-	    vertexIds.forEach(function(id) {
-	        var vertex = vgraph.entity(id);
-	        var parents = vgraph.parentWays(vertex);
-	        vertices.push(vertex);
-	        ways = ways.concat(parents);
-	    });
-
-	    vertices = utilArrayUniq(vertices);
-	    ways = utilArrayUniq(ways);
-
-	    vertexIds = vertices.map(function(v) { return v.id; });
-	    wayIds = ways.map(function(w) { return w.id; });
-
-
-	    // STEP 6:  Update the ways with some metadata that will be useful for
-	    // walking the intersection graph later and rendering turn arrows.
-
-	    function withMetadata(way, vertexIds) {
-	        var __oneWay = way.isOneWay();
-
-	        // which affixes are key vertices?
-	        var __first = (vertexIds.indexOf(way.first()) !== -1);
-	        var __last = (vertexIds.indexOf(way.last()) !== -1);
-
-	        // what roles is this way eligible for?
-	        var __via = (__first && __last);
-	        var __from = ((__first && !__oneWay) || __last);
-	        var __to = (__first || (__last && !__oneWay));
-
-	        return way.update({
-	            __first:  __first,
-	            __last:  __last,
-	            __from:  __from,
-	            __via: __via,
-	            __to:  __to,
-	            __oneWay:  __oneWay
-	        });
-	    }
-
-	    ways = [];
-	    wayIds.forEach(function(id) {
-	        var way = withMetadata(vgraph.entity(id), vertexIds);
-	        vgraph = vgraph.replace(way);
-	        ways.push(way);
-	    });
-
-
-	    // STEP 7:  Simplify - This is an iterative process where we:
-	    //  1. Find trivial vertices with only 2 parents
-	    //  2. trim off the leaf way from those vertices and remove from vgraph
-
-	    var keepGoing;
-	    var removeWayIds = [];
-	    var removeVertexIds = [];
-
-	    do {
-	        keepGoing = false;
-	        checkVertices = vertexIds.slice();
-
-	        for (i = 0; i < checkVertices.length; i++) {
-	            var vertexId = checkVertices[i];
-	            vertex = vgraph.hasEntity(vertexId);
-
-	            if (!vertex) {
-	                if (vertexIds.indexOf(vertexId) !== -1) {
-	                    vertexIds.splice(vertexIds.indexOf(vertexId), 1);   // stop checking this one
-	                }
-	                removeVertexIds.push(vertexId);
-	                continue;
-	            }
-
-	            parents = vgraph.parentWays(vertex);
-	            if (parents.length < 3) {
-	                if (vertexIds.indexOf(vertexId) !== -1) {
-	                    vertexIds.splice(vertexIds.indexOf(vertexId), 1);   // stop checking this one
-	                }
-	            }
-
-	            if (parents.length === 2) {     // vertex with 2 parents is trivial
-	                var a = parents[0];
-	                var b = parents[1];
-	                var aIsLeaf = a && !a.__via;
-	                var bIsLeaf = b && !b.__via;
-	                var leaf, survivor;
-
-	                if (aIsLeaf && !bIsLeaf) {
-	                    leaf = a;
-	                    survivor = b;
-	                } else if (!aIsLeaf && bIsLeaf) {
-	                    leaf = b;
-	                    survivor = a;
-	                }
-
-	                if (leaf && survivor) {
-	                    survivor = withMetadata(survivor, vertexIds);      // update survivor way
-	                    vgraph = vgraph.replace(survivor).remove(leaf);    // update graph
-	                    removeWayIds.push(leaf.id);
-	                    keepGoing = true;
-	                }
-	            }
-
-	            parents = vgraph.parentWays(vertex);
-
-	            if (parents.length < 2) {     // vertex is no longer a key vertex
-	                if (vertexIds.indexOf(vertexId) !== -1) {
-	                    vertexIds.splice(vertexIds.indexOf(vertexId), 1);   // stop checking this one
-	                }
-	                removeVertexIds.push(vertexId);
-	                keepGoing = true;
-	            }
-
-	            if (parents.length < 1) {     // vertex is no longer attached to anything
-	                vgraph = vgraph.remove(vertex);
-	            }
-
-	        }
-	    } while (keepGoing);
-
-
-	    vertices = vertices
-	        .filter(function(vertex) { return removeVertexIds.indexOf(vertex.id) === -1; })
-	        .map(function(vertex) { return vgraph.entity(vertex.id); });
-	    ways = ways
-	        .filter(function(way) { return removeWayIds.indexOf(way.id) === -1; })
-	        .map(function(way) { return vgraph.entity(way.id); });
-
-
-	    // OK!  Here is our intersection..
-	    var intersection = {
-	        graph: vgraph,
-	        actions: actions,
-	        vertices: vertices,
-	        ways: ways,
-	    };
-
-
-
-	    // Get all the valid turns through this intersection given a starting way id.
-	    // This operates on the virtual graph for everything.
-	    //
-	    // Basically, walk through all possible paths from starting way,
-	    //   honoring the existing turn restrictions as we go (watch out for loops!)
-	    //
-	    // For each path found, generate and return a `osmTurn` datastructure.
-	    //
-	    intersection.turns = function(fromWayId, maxViaWay) {
-	        if (!fromWayId) { return []; }
-	        if (!maxViaWay) { maxViaWay = 0; }
-
-	        var vgraph = intersection.graph;
-	        var keyVertexIds = intersection.vertices.map(function(v) { return v.id; });
-
-	        var start = vgraph.entity(fromWayId);
-	        if (!start || !(start.__from || start.__via)) { return []; }
-
-	        // maxViaWay=0   from-*-to              (0 vias)
-	        // maxViaWay=1   from-*-via-*-to        (1 via max)
-	        // maxViaWay=2   from-*-via-*-via-*-to  (2 vias max)
-	        var maxPathLength = (maxViaWay * 2) + 3;
-	        var turns = [];
-
-	        step(start);
-	        return turns;
-
-
-	        // traverse the intersection graph and find all the valid paths
-	        function step(entity, currPath, currRestrictions, matchedRestriction) {
-	            currPath = (currPath || []).slice();  // shallow copy
-	            if (currPath.length >= maxPathLength) { return; }
-	            currPath.push(entity.id);
-	            currRestrictions = (currRestrictions || []).slice();  // shallow copy
-	            var i, j;
-
-	            if (entity.type === 'node') {
-	                var parents = vgraph.parentWays(entity);
-	                var nextWays = [];
-
-	                // which ways can we step into?
-	                for (i = 0; i < parents.length; i++) {
-	                    var way = parents[i];
-
-	                    // if next way is a oneway incoming to this vertex, skip
-	                    if (way.__oneWay && way.nodes[0] !== entity.id) { continue; }
-
-	                    // if we have seen it before (allowing for an initial u-turn), skip
-	                    if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) { continue; }
-
-	                    // Check all "current" restrictions (where we've already walked the `FROM`)
-	                    var restrict = undefined;
-	                    for (j = 0; j < currRestrictions.length; j++) {
-	                        var restriction = currRestrictions[j];
-	                        var f = restriction.memberByRole('from');
-	                        var v = restriction.membersByRole('via');
-	                        var t = restriction.memberByRole('to');
-	                        var isOnly = /^only_/.test(restriction.tags.restriction);
-
-	                        // Does the current path match this turn restriction?
-	                        var matchesFrom = (f.id === fromWayId);
-	                        var matchesViaTo = false;
-	                        var isAlongOnlyPath = false;
-
-	                        if (t.id === way.id) {     // match TO
-
-	                            if (v.length === 1 && v[0].type === 'node') {    // match VIA node
-	                                matchesViaTo = (v[0].id === entity.id && (
-	                                    (matchesFrom && currPath.length === 2) ||
-	                                    (!matchesFrom && currPath.length > 2)
-	                                ));
-
-	                            } else {                                         // match all VIA ways
-	                                var pathVias = [];
-	                                for (k = 2; k < currPath.length; k +=2 ) {   // k = 2 skips FROM
-	                                    pathVias.push(currPath[k]);              // (path goes way-node-way...)
-	                                }
-	                                var restrictionVias = [];
-	                                for (k = 0; k < v.length; k++) {
-	                                    if (v[k].type === 'way') {
-	                                        restrictionVias.push(v[k].id);
-	                                    }
-	                                }
-	                                var diff = utilArrayDifference(pathVias, restrictionVias);
-	                                matchesViaTo = !diff.length;
-	                            }
-
-	                        } else if (isOnly) {
-	                            for (k = 0; k < v.length; k++) {
-	                                // way doesn't match TO, but is one of the via ways along the path of an "only"
-	                                if (v[k].type === 'way' && v[k].id === way.id) {
-	                                    isAlongOnlyPath = true;
-	                                    break;
-	                                }
-	                            }
-	                        }
-
-	                        if (matchesViaTo) {
-	                            if (isOnly) {
-	                                restrict = { id: restriction.id, direct: matchesFrom, from: f.id, only: true, end: true };
-	                            } else {
-	                                restrict = { id: restriction.id, direct: matchesFrom, from: f.id, no: true, end: true };
-	                            }
-	                        } else {    // indirect - caused by a different nearby restriction
-	                            if (isAlongOnlyPath) {
-	                                restrict = { id: restriction.id, direct: false, from: f.id, only: true, end: false };
-	                            } else if (isOnly) {
-	                                restrict = { id: restriction.id, direct: false, from: f.id, no: true, end: true };
-	                            }
-	                        }
-
-	                        // stop looking if we find a "direct" restriction (matching FROM, VIA, TO)
-	                        if (restrict && restrict.direct)
-	                            { break; }
-	                    }
-
-	                    nextWays.push({ way: way, restrict: restrict });
-	                }
-
-	                nextWays.forEach(function(nextWay) {
-	                    step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
-	                });
-
-
-	            } else {  // entity.type === 'way'
-	                if (currPath.length >= 3) {     // this is a "complete" path..
-	                    var turnPath = currPath.slice();   // shallow copy
-
-	                    // an indirect restriction - only include the partial path (starting at FROM)
-	                    if (matchedRestriction && matchedRestriction.direct === false) {
-	                        for (i = 0; i < turnPath.length; i++) {
-	                            if (turnPath[i] === matchedRestriction.from) {
-	                                turnPath = turnPath.slice(i);
-	                                break;
-	                            }
-	                        }
-	                    }
-
-	                    var turn = pathToTurn(turnPath);
-	                    if (turn) {
-	                        if (matchedRestriction) {
-	                            turn.restrictionID = matchedRestriction.id;
-	                            turn.no = matchedRestriction.no;
-	                            turn.only = matchedRestriction.only;
-	                            turn.direct = matchedRestriction.direct;
-	                        }
-	                        turns.push(osmTurn(turn));
-	                    }
-
-	                    if (currPath[0] === currPath[2]) { return; }   // if we made a u-turn - stop here
-	                }
-
-	                if (matchedRestriction && matchedRestriction.end) { return; }  // don't advance any further
-
-	                // which nodes can we step into?
-	                var n1 = vgraph.entity(entity.first());
-	                var n2 = vgraph.entity(entity.last());
-	                var dist = geoSphericalDistance(n1.loc, n2.loc);
-	                var nextNodes = [];
-
-	                if (currPath.length > 1) {
-	                    if (dist > maxDistance) { return; }   // the next node is too far
-	                    if (!entity.__via) { return; }        // this way is a leaf / can't be a via
-	                }
-
-	                if (!entity.__oneWay &&                     // bidirectional..
-	                    keyVertexIds.indexOf(n1.id) !== -1 &&   // key vertex..
-	                    currPath.indexOf(n1.id) === -1) {       // haven't seen it yet..
-	                    nextNodes.push(n1);                     // can advance to first node
-	                }
-	                if (keyVertexIds.indexOf(n2.id) !== -1 &&   // key vertex..
-	                    currPath.indexOf(n2.id) === -1) {       // haven't seen it yet..
-	                    nextNodes.push(n2);                     // can advance to last node
-	                }
-
-	                nextNodes.forEach(function(nextNode) {
-	                    // gather restrictions FROM this way
-	                    var fromRestrictions = vgraph.parentRelations(entity).filter(function(r) {
-	                        if (!r.isRestriction()) { return false; }
-
-	                        var f = r.memberByRole('from');
-	                        if (!f || f.id !== entity.id) { return false; }
-
-	                        var isOnly = /^only_/.test(r.tags.restriction);
-	                        if (!isOnly) { return true; }
-
-	                        // `only_` restrictions only matter along the direction of the VIA - #4849
-	                        var isOnlyVia = false;
-	                        var v = r.membersByRole('via');
-	                        if (v.length === 1 && v[0].type === 'node') {   // via node
-	                            isOnlyVia = (v[0].id === nextNode.id);
-	                        } else {                                        // via way(s)
-	                            for (var i = 0; i < v.length; i++) {
-	                                if (v[i].type !== 'way') { continue; }
-	                                var viaWay = vgraph.entity(v[i].id);
-	                                if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
-	                                    isOnlyVia = true;
-	                                    break;
-	                                }
-	                            }
-	                        }
-	                        return isOnlyVia;
-	                    });
-
-	                    step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
-	                });
-	            }
-	        }
-
-
-	        // assumes path is alternating way-node-way of odd length
-	        function pathToTurn(path) {
-	            if (path.length < 3) { return; }
-	            var fromWayId, fromNodeId, fromVertexId;
-	            var toWayId, toNodeId, toVertexId;
-	            var viaWayIds, viaNodeId, isUturn;
-
-	            fromWayId = path[0];
-	            toWayId = path[path.length - 1];
-
-	            if (path.length === 3 && fromWayId === toWayId) {  // u turn
-	                var way = vgraph.entity(fromWayId);
-	                if (way.__oneWay) { return null; }
-
-	                isUturn = true;
-	                viaNodeId = fromVertexId = toVertexId = path[1];
-	                fromNodeId = toNodeId = adjacentNode(fromWayId, viaNodeId);
-
-	            } else {
-	                isUturn = false;
-	                fromVertexId = path[1];
-	                fromNodeId = adjacentNode(fromWayId, fromVertexId);
-	                toVertexId = path[path.length - 2];
-	                toNodeId = adjacentNode(toWayId, toVertexId);
-
-	                if (path.length === 3) {
-	                    viaNodeId = path[1];
-	                } else {
-	                    viaWayIds = path.filter(function(entityId) { return entityId[0] === 'w'; });
-	                    viaWayIds = viaWayIds.slice(1, viaWayIds.length - 1);  // remove first, last
-	                }
-	            }
-
-	            return {
-	                key:  path.join('_'),
-	                path: path,
-	                from: { node: fromNodeId, way:  fromWayId, vertex: fromVertexId },
-	                via:  { node: viaNodeId,  ways: viaWayIds },
-	                to:   { node: toNodeId,   way:  toWayId, vertex: toVertexId },
-	                u:    isUturn
-	            };
-
-
-	            function adjacentNode(wayId, affixId) {
-	                var nodes = vgraph.entity(wayId).nodes;
-	                return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
-	            }
-	        }
-
-	    };
-
-	    return intersection;
-	}
-
-
-	function osmInferRestriction(graph, turn, projection) {
-	    var fromWay = graph.entity(turn.from.way);
-	    var fromNode = graph.entity(turn.from.node);
-	    var fromVertex = graph.entity(turn.from.vertex);
-	    var toWay = graph.entity(turn.to.way);
-	    var toNode = graph.entity(turn.to.node);
-	    var toVertex = graph.entity(turn.to.vertex);
-
-	    var fromOneWay = (fromWay.tags.oneway === 'yes');
-	    var toOneWay = (toWay.tags.oneway === 'yes');
-	    var angle = (geoAngle(fromVertex, fromNode, projection) -
-	                geoAngle(toVertex, toNode, projection)) * 180 / Math.PI;
-
-	    while (angle < 0)
-	        { angle += 360; }
-
-	    if (fromNode === toNode)
-	        { return 'no_u_turn'; }
-	    if ((angle < 23 || angle > 336) && fromOneWay && toOneWay)
-	        { return 'no_u_turn'; }   // wider tolerance for u-turn if both ways are oneway
-	    if ((angle < 40 || angle > 319) && fromOneWay && toOneWay && turn.from.vertex !== turn.to.vertex)
-	        { return 'no_u_turn'; }   // even wider tolerance for u-turn if there is a via way (from !== to)
-	    if (angle < 158)
-	        { return 'no_right_turn'; }
-	    if (angle > 202)
-	        { return 'no_left_turn'; }
-
-	    return 'no_straight_on';
-	}
-
-	function actionMergePolygon(ids, newRelationId) {
-
-	    function groupEntities(graph) {
-	        var entities = ids.map(function (id) { return graph.entity(id); });
-	        var geometryGroups = utilArrayGroupBy(entities, function(entity) {
-	            if (entity.type === 'way' && entity.isClosed()) {
-	                return 'closedWay';
-	            } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-	                return 'multipolygon';
-	            } else {
-	                return 'other';
-	            }
-	        });
-
-	        return Object.assign(
-	            { closedWay: [], multipolygon: [], other: [] },
-	            geometryGroups
-	        );
-	    }
-
-
-	    var action = function(graph) {
-	        var entities = groupEntities(graph);
-
-	        // An array representing all the polygons that are part of the multipolygon.
-	        //
-	        // Each element is itself an array of objects with an id property, and has a
-	        // locs property which is an array of the locations forming the polygon.
-	        var polygons = entities.multipolygon.reduce(function(polygons, m) {
-	            return polygons.concat(osmJoinWays(m.members, graph));
-	        }, []).concat(entities.closedWay.map(function(d) {
-	            var member = [{id: d.id}];
-	            member.nodes = graph.childNodes(d);
-	            return member;
-	        }));
-
-	        // contained is an array of arrays of boolean values,
-	        // where contained[j][k] is true iff the jth way is
-	        // contained by the kth way.
-	        var contained = polygons.map(function(w, i) {
-	            return polygons.map(function(d, n) {
-	                if (i === n) { return null; }
-	                return geoPolygonContainsPolygon(
-	                    d.nodes.map(function(n) { return n.loc; }),
-	                    w.nodes.map(function(n) { return n.loc; })
-	                );
-	            });
-	        });
-
-	        // Sort all polygons as either outer or inner ways
-	        var members = [];
-	        var outer = true;
-
-	        while (polygons.length) {
-	            extractUncontained(polygons);
-	            polygons = polygons.filter(isContained);
-	            contained = contained.filter(isContained).map(filterContained);
-	        }
-
-	        function isContained(d, i) {
-	            return contained[i].some(function(val) { return val; });
-	        }
-
-	        function filterContained(d) {
-	            return d.filter(isContained);
-	        }
-
-	        function extractUncontained(polygons) {
-	            polygons.forEach(function(d, i) {
-	                if (!isContained(d, i)) {
-	                    d.forEach(function(member) {
-	                        members.push({
-	                            type: 'way',
-	                            id: member.id,
-	                            role: outer ? 'outer' : 'inner'
-	                        });
-	                    });
-	                }
-	            });
-	            outer = !outer;
-	        }
-
-	        // Move all tags to one relation
-	        var relation = entities.multipolygon[0] ||
-	            osmRelation({ id: newRelationId, tags: { type: 'multipolygon' }});
-
-	        entities.multipolygon.slice(1).forEach(function(m) {
-	            relation = relation.mergeTags(m.tags);
-	            graph = graph.remove(m);
-	        });
-
-	        entities.closedWay.forEach(function(way) {
-	            function isThisOuter(m) {
-	                return m.id === way.id && m.role !== 'inner';
-	            }
-	            if (members.some(isThisOuter)) {
-	                relation = relation.mergeTags(way.tags);
-	                graph = graph.replace(way.update({ tags: {} }));
-	            }
-	        });
-
-	        return graph.replace(relation.update({
-	            members: members,
-	            tags: utilObjectOmit(relation.tags, ['area'])
-	        }));
-	    };
-
-
-	    action.disabled = function(graph) {
-	        var entities = groupEntities(graph);
-	        if (entities.other.length > 0 ||
-	            entities.closedWay.length + entities.multipolygon.length < 2) {
-	            return 'not_eligible';
-	        }
-	        if (!entities.multipolygon.every(function(r) { return r.isComplete(graph); })) {
-	            return 'incomplete_relation';
-	        }
-
-	        if (!entities.multipolygon.length) {
-	            var sharedMultipolygons = [];
-	            entities.closedWay.forEach(function(way, i) {
-	                if (i === 0) {
-	                    sharedMultipolygons = graph.parentMultipolygons(way);
-	                } else {
-	                    sharedMultipolygons = utilArrayIntersection(sharedMultipolygons, graph.parentMultipolygons(way));
-	                }
-	            });
-	            sharedMultipolygons = sharedMultipolygons.filter(function(relation) {
-	                return relation.members.length === entities.closedWay.length;
-	            });
-	            if (sharedMultipolygons.length) {
-	                // don't create a new multipolygon if it'd be redundant
-	                return 'not_eligible';
-	            }
-	        } else if (entities.closedWay.some(function(way) {
-	                return utilArrayIntersection(graph.parentMultipolygons(way), entities.multipolygon).length;
-	            })) {
-	            // don't add a way to a multipolygon again if it's already a member
-	            return 'not_eligible';
-	        }
-	    };
-
-
-	    return action;
-	}
-
-	// do not edit .js files directly - edit src/index.jst
-
-
-
-	var fastDeepEqual = function equal(a, b) {
-	  if (a === b) { return true; }
-
-	  if (a && b && typeof a == 'object' && typeof b == 'object') {
-	    if (a.constructor !== b.constructor) { return false; }
-
-	    var length, i, keys;
-	    if (Array.isArray(a)) {
-	      length = a.length;
-	      if (length != b.length) { return false; }
-	      for (i = length; i-- !== 0;)
-	        { if (!equal(a[i], b[i])) { return false; } }
-	      return true;
-	    }
-
-
-
-	    if (a.constructor === RegExp) { return a.source === b.source && a.flags === b.flags; }
-	    if (a.valueOf !== Object.prototype.valueOf) { return a.valueOf() === b.valueOf(); }
-	    if (a.toString !== Object.prototype.toString) { return a.toString() === b.toString(); }
-
-	    keys = Object.keys(a);
-	    length = keys.length;
-	    if (length !== Object.keys(b).length) { return false; }
-
-	    for (i = length; i-- !== 0;)
-	      { if (!Object.prototype.hasOwnProperty.call(b, keys[i])) { return false; } }
-
-	    for (i = length; i-- !== 0;) {
-	      var key = keys[i];
-
-	      if (!equal(a[key], b[key])) { return false; }
-	    }
-
-	    return true;
-	  }
-
-	  // true if both NaN, false otherwise
-	  return a!==a && b!==b;
-	};
-
-	// Text diff algorithm following Hunt and McIlroy 1976.
-	// J. W. Hunt and M. D. McIlroy, An algorithm for differential buffer
-	// comparison, Bell Telephone Laboratories CSTR #41 (1976)
-	// http://www.cs.dartmouth.edu/~doug/
-	// https://en.wikipedia.org/wiki/Longest_common_subsequence_problem
-	//
-	// Expects two arrays, finds longest common sequence
-	function LCS(buffer1, buffer2) {
-
-	  var equivalenceClasses = {};
-	  for (var j = 0; j < buffer2.length; j++) {
-	    var item = buffer2[j];
-	    if (equivalenceClasses[item]) {
-	      equivalenceClasses[item].push(j);
-	    } else {
-	      equivalenceClasses[item] = [j];
-	    }
-	  }
-
-	  var NULLRESULT = { buffer1index: -1, buffer2index: -1, chain: null };
-	  var candidates = [NULLRESULT];
-
-	  for (var i = 0; i < buffer1.length; i++) {
-	    var item$1 = buffer1[i];
-	    var buffer2indices = equivalenceClasses[item$1] || [];
-	    var r = 0;
-	    var c = candidates[0];
-
-	    for (var jx = 0; jx < buffer2indices.length; jx++) {
-	      var j$1 = buffer2indices[jx];
-
-	      var s = (void 0);
-	      for (s = r; s < candidates.length; s++) {
-	        if ((candidates[s].buffer2index < j$1) && ((s === candidates.length - 1) || (candidates[s + 1].buffer2index > j$1))) {
-	          break;
-	        }
-	      }
-
-	      if (s < candidates.length) {
-	        var newCandidate = { buffer1index: i, buffer2index: j$1, chain: candidates[s] };
-	        if (r === candidates.length) {
-	          candidates.push(c);
-	        } else {
-	          candidates[r] = c;
-	        }
-	        r = s + 1;
-	        c = newCandidate;
-	        if (r === candidates.length) {
-	          break; // no point in examining further (j)s
-	        }
-	      }
-	    }
-
-	    candidates[r] = c;
-	  }
-
-	  // At this point, we know the LCS: it's in the reverse of the
-	  // linked-list through .chain of candidates[candidates.length - 1].
-
-	  return candidates[candidates.length - 1];
-	}
-
-
-	// We apply the LCS to give a simple representation of the
-	// offsets and lengths of mismatched chunks in the input
-	// buffers. This is used by diff3MergeRegions.
-	function diffIndices(buffer1, buffer2) {
-	  var lcs = LCS(buffer1, buffer2);
-	  var result = [];
-	  var tail1 = buffer1.length;
-	  var tail2 = buffer2.length;
-
-	  for (var candidate = lcs; candidate !== null; candidate = candidate.chain) {
-	    var mismatchLength1 = tail1 - candidate.buffer1index - 1;
-	    var mismatchLength2 = tail2 - candidate.buffer2index - 1;
-	    tail1 = candidate.buffer1index;
-	    tail2 = candidate.buffer2index;
-
-	    if (mismatchLength1 || mismatchLength2) {
-	      result.push({
-	        buffer1: [tail1 + 1, mismatchLength1],
-	        buffer1Content: buffer1.slice(tail1 + 1, tail1 + 1 + mismatchLength1),
-	        buffer2: [tail2 + 1, mismatchLength2],
-	        buffer2Content: buffer2.slice(tail2 + 1, tail2 + 1 + mismatchLength2)
-	      });
-	    }
-	  }
-
-	  result.reverse();
-	  return result;
-	}
-
-
-	// Given three buffers, A, O, and B, where both A and B are
-	// independently derived from O, returns a fairly complicated
-	// internal representation of merge decisions it's taken. The
-	// interested reader may wish to consult
-	//
-	// Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce.
-	// 'A Formal Investigation of ' In Arvind and Prasad,
-	// editors, Foundations of Software Technology and Theoretical
-	// Computer Science (FSTTCS), December 2007.
-	//
-	// (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
-	//
-	function diff3MergeRegions(a, o, b) {
-
-	  // "hunks" are array subsets where `a` or `b` are different from `o`
-	  // https://www.gnu.org/software/diffutils/manual/html_node/diff3-Hunks.html
-	  var hunks = [];
-	  function addHunk(h, ab) {
-	    hunks.push({
-	      ab: ab,
-	      oStart: h.buffer1[0],
-	      oLength: h.buffer1[1],   // length of o to remove
-	      abStart: h.buffer2[0],
-	      abLength: h.buffer2[1]   // length of a/b to insert
-	      // abContent: (ab === 'a' ? a : b).slice(h.buffer2[0], h.buffer2[0] + h.buffer2[1])
-	    });
-	  }
-
-	  diffIndices(o, a).forEach(function (item) { return addHunk(item, 'a'); });
-	  diffIndices(o, b).forEach(function (item) { return addHunk(item, 'b'); });
-	  hunks.sort(function (x,y) { return x.oStart - y.oStart; });
-
-	  var results = [];
-	  var currOffset = 0;
-
-	  function advanceTo(endOffset) {
-	    if (endOffset > currOffset) {
-	      results.push({
-	        stable: true,
-	        buffer: 'o',
-	        bufferStart: currOffset,
-	        bufferLength: endOffset - currOffset,
-	        bufferContent: o.slice(currOffset, endOffset)
-	      });
-	      currOffset = endOffset;
-	    }
-	  }
-
-	  while (hunks.length) {
-	    var hunk = hunks.shift();
-	    var regionStart = hunk.oStart;
-	    var regionEnd = hunk.oStart + hunk.oLength;
-	    var regionHunks = [hunk];
-	    advanceTo(regionStart);
-
-	    // Try to pull next overlapping hunk into this region
-	    while (hunks.length) {
-	      var nextHunk = hunks[0];
-	      var nextHunkStart = nextHunk.oStart;
-	      if (nextHunkStart > regionEnd) { break; }   // no overlap
-
-	      regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
-	      regionHunks.push(hunks.shift());
-	    }
-
-	    if (regionHunks.length === 1) {
-	      // Only one hunk touches this region, meaning that there is no conflict here.
-	      // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
-	      if (hunk.abLength > 0) {
-	        var buffer = (hunk.ab === 'a' ? a : b);
-	        results.push({
-	          stable: true,
-	          buffer: hunk.ab,
-	          bufferStart: hunk.abStart,
-	          bufferLength: hunk.abLength,
-	          bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
-	        });
-	      }
-	    } else {
-	      // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
-	      // Effectively merge all the `a` hunks into one giant hunk, then do the
-	      // same for the `b` hunks; then, correct for skew in the regions of `o`
-	      // that each side changed, and report appropriate spans for the three sides.
-	      var bounds = {
-	        a: [a.length, -1, o.length, -1],
-	        b: [b.length, -1, o.length, -1]
-	      };
-	      while (regionHunks.length) {
-	        hunk = regionHunks.shift();
-	        var oStart = hunk.oStart;
-	        var oEnd = oStart + hunk.oLength;
-	        var abStart = hunk.abStart;
-	        var abEnd = abStart + hunk.abLength;
-	        var b$1 = bounds[hunk.ab];
-	        b$1[0] = Math.min(abStart, b$1[0]);
-	        b$1[1] = Math.max(abEnd, b$1[1]);
-	        b$1[2] = Math.min(oStart, b$1[2]);
-	        b$1[3] = Math.max(oEnd, b$1[3]);
-	      }
-
-	      var aStart = bounds.a[0] + (regionStart - bounds.a[2]);
-	      var aEnd = bounds.a[1] + (regionEnd - bounds.a[3]);
-	      var bStart = bounds.b[0] + (regionStart - bounds.b[2]);
-	      var bEnd = bounds.b[1] + (regionEnd - bounds.b[3]);
-
-	      var result = {
-	        stable: false,
-	        aStart: aStart,
-	        aLength: aEnd - aStart,
-	        aContent: a.slice(aStart, aEnd),
-	        oStart: regionStart,
-	        oLength: regionEnd - regionStart,
-	        oContent: o.slice(regionStart, regionEnd),
-	        bStart: bStart,
-	        bLength: bEnd - bStart,
-	        bContent: b.slice(bStart, bEnd)
-	      };
-	      results.push(result);
-	    }
-	    currOffset = regionEnd;
-	  }
-
-	  advanceTo(o.length);
-
-	  return results;
-	}
-
-
-	// Applies the output of diff3MergeRegions to actually
-	// construct the merged buffer; the returned result alternates
-	// between 'ok' and 'conflict' blocks.
-	// A "false conflict" is where `a` and `b` both change the same from `o`
-	function diff3Merge(a, o, b, options) {
-	  var defaults = {
-	    excludeFalseConflicts: true,
-	    stringSeparator: /\s+/
-	  };
-	  options = Object.assign(defaults, options);
-
-	  var aString = (typeof a === 'string');
-	  var oString = (typeof o === 'string');
-	  var bString = (typeof b === 'string');
-
-	  if (aString) { a = a.split(options.stringSeparator); }
-	  if (oString) { o = o.split(options.stringSeparator); }
-	  if (bString) { b = b.split(options.stringSeparator); }
-
-	  var results = [];
-	  var regions = diff3MergeRegions(a, o, b);
-
-	  var okBuffer = [];
-	  function flushOk() {
-	    if (okBuffer.length) {
-	      results.push({ ok: okBuffer });
-	    }
-	    okBuffer = [];
-	  }
-
-	  function isFalseConflict(a, b) {
-	    if (a.length !== b.length) { return false; }
-	    for (var i = 0; i < a.length; i++) {
-	      if (a[i] !== b[i]) { return false; }
-	    }
-	    return true;
-	  }
-
-	  regions.forEach(function (region) {
-	    if (region.stable) {
-	      okBuffer.push.apply(okBuffer, region.bufferContent);
-	    } else {
-	      if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
-	        okBuffer.push.apply(okBuffer, region.aContent);
-	      } else {
-	        flushOk();
-	        results.push({
-	          conflict: {
-	            a: region.aContent,
-	            aIndex: region.aStart,
-	            o: region.oContent,
-	            oIndex: region.oStart,
-	            b: region.bContent,
-	            bIndex: region.bStart
-	          }
-	        });
-	      }
-	    }
-	  });
-
-	  flushOk();
-	  return results;
-	}
-
-	function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
-	    discardTags = discardTags || {};
-	    var _option = 'safe';  // 'safe', 'force_local', 'force_remote'
-	    var _conflicts = [];
-
-
-	    function user(d) {
-	        return (typeof formatUser === 'function') ? formatUser(d) : d;
-	    }
-
-
-	    function mergeLocation(remote, target) {
-	        function pointEqual(a, b) {
-	            var epsilon = 1e-6;
-	            return (Math.abs(a[0] - b[0]) < epsilon) && (Math.abs(a[1] - b[1]) < epsilon);
-	        }
-
-	        if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
-	            return target;
-	        }
-	        if (_option === 'force_remote') {
-	            return target.update({loc: remote.loc});
-	        }
-
-	        _conflicts.push(_t('merge_remote_changes.conflict.location', { user: user(remote.user) }));
-	        return target;
-	    }
-
-
-	    function mergeNodes(base, remote, target) {
-	        if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
-	            return target;
-	        }
-	        if (_option === 'force_remote') {
-	            return target.update({nodes: remote.nodes});
-	        }
-
-	        var ccount = _conflicts.length;
-	        var o = base.nodes || [];
-	        var a = target.nodes || [];
-	        var b = remote.nodes || [];
-	        var nodes = [];
-	        var hunks = diff3Merge(a, o, b, { excludeFalseConflicts: true });
-
-	        for (var i = 0; i < hunks.length; i++) {
-	            var hunk = hunks[i];
-	            if (hunk.ok) {
-	                nodes.push.apply(nodes, hunk.ok);
-	            } else {
-	                // for all conflicts, we can assume c.a !== c.b
-	                // because `diff3Merge` called with `true` option to exclude false conflicts..
-	                var c = hunk.conflict;
-	                if (fastDeepEqual(c.o, c.a)) {  // only changed remotely
-	                    nodes.push.apply(nodes, c.b);
-	                } else if (fastDeepEqual(c.o, c.b)) {  // only changed locally
-	                    nodes.push.apply(nodes, c.a);
-	                } else {       // changed both locally and remotely
-	                    _conflicts.push(_t('merge_remote_changes.conflict.nodelist', { user: user(remote.user) }));
-	                    break;
-	                }
-	            }
-	        }
-
-	        return (_conflicts.length === ccount) ? target.update({nodes: nodes}) : target;
-	    }
-
-
-	    function mergeChildren(targetWay, children, updates, graph) {
-	        function isUsed(node, targetWay) {
-	            var hasInterestingParent = graph.parentWays(node)
-	                .some(function(way) { return way.id !== targetWay.id; });
-
-	            return node.hasInterestingTags() ||
-	                hasInterestingParent ||
-	                graph.parentRelations(node).length > 0;
-	        }
-
-	        var ccount = _conflicts.length;
-
-	        for (var i = 0; i < children.length; i++) {
-	            var id = children[i];
-	            var node = graph.hasEntity(id);
-
-	            // remove unused childNodes..
-	            if (targetWay.nodes.indexOf(id) === -1) {
-	                if (node && !isUsed(node, targetWay)) {
-	                    updates.removeIds.push(id);
-	                }
-	                continue;
-	            }
-
-	            // restore used childNodes..
-	            var local = localGraph.hasEntity(id);
-	            var remote = remoteGraph.hasEntity(id);
-	            var target;
-
-	            if (_option === 'force_remote' && remote && remote.visible) {
-	                updates.replacements.push(remote);
-
-	            } else if (_option === 'force_local' && local) {
-	                target = osmEntity(local);
-	                if (remote) {
-	                    target = target.update({ version: remote.version });
-	                }
-	                updates.replacements.push(target);
-
-	            } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
-	                target = osmEntity(local, { version: remote.version });
-	                if (remote.visible) {
-	                    target = mergeLocation(remote, target);
-	                } else {
-	                    _conflicts.push(_t('merge_remote_changes.conflict.deleted', { user: user(remote.user) }));
-	                }
-
-	                if (_conflicts.length !== ccount) { break; }
-	                updates.replacements.push(target);
-	            }
-	        }
-
-	        return targetWay;
-	    }
-
-
-	    function updateChildren(updates, graph) {
-	        for (var i = 0; i < updates.replacements.length; i++) {
-	            graph = graph.replace(updates.replacements[i]);
-	        }
-	        if (updates.removeIds.length) {
-	            graph = actionDeleteMultiple(updates.removeIds)(graph);
-	        }
-	        return graph;
-	    }
-
-
-	    function mergeMembers(remote, target) {
-	        if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
-	            return target;
-	        }
-	        if (_option === 'force_remote') {
-	            return target.update({members: remote.members});
-	        }
-
-	        _conflicts.push(_t('merge_remote_changes.conflict.memberlist', { user: user(remote.user) }));
-	        return target;
-	    }
-
-
-	    function mergeTags(base, remote, target) {
-	        if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
-	            return target;
-	        }
-	        if (_option === 'force_remote') {
-	            return target.update({tags: remote.tags});
-	        }
-
-	        var ccount = _conflicts.length;
-	        var o = base.tags || {};
-	        var a = target.tags || {};
-	        var b = remote.tags || {};
-	        var keys = utilArrayUnion(utilArrayUnion(Object.keys(o), Object.keys(a)), Object.keys(b))
-	            .filter(function(k) { return !discardTags[k]; });
-	        var tags = Object.assign({}, a);   // shallow copy
-	        var changed = false;
-
-	        for (var i = 0; i < keys.length; i++) {
-	            var k = keys[i];
-
-	            if (o[k] !== b[k] && a[k] !== b[k]) {    // changed remotely..
-	                if (o[k] !== a[k]) {      // changed locally..
-	                    _conflicts.push(_t('merge_remote_changes.conflict.tags',
-	                        { tag: k, local: a[k], remote: b[k], user: user(remote.user) }));
-
-	                } else {                  // unchanged locally, accept remote change..
-	                    if (b.hasOwnProperty(k)) {
-	                        tags[k] = b[k];
-	                    } else {
-	                        delete tags[k];
-	                    }
-	                    changed = true;
-	                }
-	            }
-	        }
-
-	        return (changed && _conflicts.length === ccount) ? target.update({tags: tags}) : target;
-	    }
-
-
-	    //  `graph.base()` is the common ancestor of the two graphs.
-	    //  `localGraph` contains user's edits up to saving
-	    //  `remoteGraph` contains remote edits to modified nodes
-	    //  `graph` must be a descendent of `localGraph` and may include
-	    //      some conflict resolution actions performed on it.
-	    //
-	    //                  --- ... --- `localGraph` -- ... -- `graph`
-	    //                 /
-	    //  `graph.base()` --- ... --- `remoteGraph`
-	    //
-	    var action = function(graph) {
-	        var updates = { replacements: [], removeIds: [] };
-	        var base = graph.base().entities[id];
-	        var local = localGraph.entity(id);
-	        var remote = remoteGraph.entity(id);
-	        var target = osmEntity(local, { version: remote.version });
-
-	        // delete/undelete
-	        if (!remote.visible) {
-	            if (_option === 'force_remote') {
-	                return actionDeleteMultiple([id])(graph);
-
-	            } else if (_option === 'force_local') {
-	                if (target.type === 'way') {
-	                    target = mergeChildren(target, utilArrayUniq(local.nodes), updates, graph);
-	                    graph = updateChildren(updates, graph);
-	                }
-	                return graph.replace(target);
-
-	            } else {
-	                _conflicts.push(_t('merge_remote_changes.conflict.deleted', { user: user(remote.user) }));
-	                return graph;  // do nothing
-	            }
-	        }
-
-	        // merge
-	        if (target.type === 'node') {
-	            target = mergeLocation(remote, target);
-
-	        } else if (target.type === 'way') {
-	            // pull in any child nodes that may not be present locally..
-	            graph.rebase(remoteGraph.childNodes(remote), [graph], false);
-	            target = mergeNodes(base, remote, target);
-	            target = mergeChildren(target, utilArrayUnion(local.nodes, remote.nodes), updates, graph);
-
-	        } else if (target.type === 'relation') {
-	            target = mergeMembers(remote, target);
-	        }
-
-	        target = mergeTags(base, remote, target);
-
-	        if (!_conflicts.length) {
-	            graph = updateChildren(updates, graph).replace(target);
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.withOption = function(opt) {
-	        _option = opt;
-	        return action;
-	    };
-
-
-	    action.conflicts = function() {
-	        return _conflicts;
-	    };
-
-
-	    return action;
-	}
-
-	// https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/command/MoveCommand.java
-	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
-	function actionMove(moveIDs, tryDelta, projection, cache) {
-	    var _delta = tryDelta;
-
-	    function setupCache(graph) {
-	        function canMove(nodeID) {
-	            // Allow movement of any node that is in the selectedIDs list..
-	            if (moveIDs.indexOf(nodeID) !== -1) { return true; }
-
-	            // Allow movement of a vertex where 2 ways meet..
-	            var parents = graph.parentWays(graph.entity(nodeID));
-	            if (parents.length < 3) { return true; }
-
-	            // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..
-	            var parentsMoving = parents.every(function(way) { return cache.moving[way.id]; });
-	            if (!parentsMoving) { delete cache.moving[nodeID]; }
-
-	            return parentsMoving;
-	        }
-
-	        function cacheEntities(ids) {
-	            for (var i = 0; i < ids.length; i++) {
-	                var id = ids[i];
-	                if (cache.moving[id]) { continue; }
-	                cache.moving[id] = true;
-
-	                var entity = graph.hasEntity(id);
-	                if (!entity) { continue; }
-
-	                if (entity.type === 'node') {
-	                    cache.nodes.push(id);
-	                    cache.startLoc[id] = entity.loc;
-	                } else if (entity.type === 'way') {
-	                    cache.ways.push(id);
-	                    cacheEntities(entity.nodes);
-	                } else {
-	                    cacheEntities(entity.members.map(function(member) {
-	                        return member.id;
-	                    }));
-	                }
-	            }
-	        }
-
-	        function cacheIntersections(ids) {
-	            function isEndpoint(way, id) {
-	                return !way.isClosed() && !!way.affix(id);
-	            }
-
-	            for (var i = 0; i < ids.length; i++) {
-	                var id = ids[i];
-
-	                // consider only intersections with 1 moved and 1 unmoved way.
-	                var childNodes = graph.childNodes(graph.entity(id));
-	                for (var j = 0; j < childNodes.length; j++) {
-	                    var node = childNodes[j];
-	                    var parents = graph.parentWays(node);
-	                    if (parents.length !== 2) { continue; }
-
-	                    var moved = graph.entity(id);
-	                    var unmoved = null;
-	                    for (var k = 0; k < parents.length; k++) {
-	                        var way = parents[k];
-	                        if (!cache.moving[way.id]) {
-	                            unmoved = way;
-	                            break;
-	                        }
-	                    }
-	                    if (!unmoved) { continue; }
-
-	                    // exclude ways that are overly connected..
-	                    if (utilArrayIntersection(moved.nodes, unmoved.nodes).length > 2) { continue; }
-	                    if (moved.isArea() || unmoved.isArea()) { continue; }
-
-	                    cache.intersections.push({
-	                        nodeId: node.id,
-	                        movedId: moved.id,
-	                        unmovedId: unmoved.id,
-	                        movedIsEP: isEndpoint(moved, node.id),
-	                        unmovedIsEP: isEndpoint(unmoved, node.id)
-	                    });
-	                }
-	            }
-	        }
-
-
-	        if (!cache) {
-	            cache = {};
-	        }
-	        if (!cache.ok) {
-	            cache.moving = {};
-	            cache.intersections = [];
-	            cache.replacedVertex = {};
-	            cache.startLoc = {};
-	            cache.nodes = [];
-	            cache.ways = [];
-
-	            cacheEntities(moveIDs);
-	            cacheIntersections(cache.ways);
-	            cache.nodes = cache.nodes.filter(canMove);
-
-	            cache.ok = true;
-	        }
-	    }
-
-
-	    // Place a vertex where the moved vertex used to be, to preserve way shape..
-	    //
-	    //  Start:
-	    //      b ---- e
-	    //     / \
-	    //    /   \
-	    //   /     \
-	    //  a       c
-	    //
-	    //      *               node '*' added to preserve shape
-	    //     / \
-	    //    /   b ---- e      way `b,e` moved here:
-	    //   /     \
-	    //  a       c
-	    //
-	    //
-	    function replaceMovedVertex(nodeId, wayId, graph, delta) {
-	        var way = graph.entity(wayId);
-	        var moved = graph.entity(nodeId);
-	        var movedIndex = way.nodes.indexOf(nodeId);
-	        var len, prevIndex, nextIndex;
-
-	        if (way.isClosed()) {
-	            len = way.nodes.length - 1;
-	            prevIndex = (movedIndex + len - 1) % len;
-	            nextIndex = (movedIndex + len + 1) % len;
-	        } else {
-	            len = way.nodes.length;
-	            prevIndex = movedIndex - 1;
-	            nextIndex = movedIndex + 1;
-	        }
-
-	        var prev = graph.hasEntity(way.nodes[prevIndex]);
-	        var next = graph.hasEntity(way.nodes[nextIndex]);
-
-	        // Don't add orig vertex at endpoint..
-	        if (!prev || !next) { return graph; }
-
-	        var key = wayId + '_' + nodeId;
-	        var orig = cache.replacedVertex[key];
-	        if (!orig) {
-	            orig = osmNode();
-	            cache.replacedVertex[key] = orig;
-	            cache.startLoc[orig.id] = cache.startLoc[nodeId];
-	        }
-
-	        var start, end;
-	        if (delta) {
-	            start = projection(cache.startLoc[nodeId]);
-	            end = projection.invert(geoVecAdd(start, delta));
-	        } else {
-	            end = cache.startLoc[nodeId];
-	        }
-	        orig = orig.move(end);
-
-	        var angle = Math.abs(geoAngle(orig, prev, projection) -
-	                geoAngle(orig, next, projection)) * 180 / Math.PI;
-
-	        // Don't add orig vertex if it would just make a straight line..
-	        if (angle > 175 && angle < 185) { return graph; }
-
-	        // moving forward or backward along way?
-	        var p1 = [prev.loc, orig.loc, moved.loc, next.loc].map(projection);
-	        var p2 = [prev.loc, moved.loc, orig.loc, next.loc].map(projection);
-	        var d1 = geoPathLength(p1);
-	        var d2 = geoPathLength(p2);
-	        var insertAt = (d1 <= d2) ? movedIndex : nextIndex;
-
-	        // moving around closed loop?
-	        if (way.isClosed() && insertAt === 0) { insertAt = len; }
-
-	        way = way.addNode(orig.id, insertAt);
-	        return graph.replace(orig).replace(way);
-	    }
-
-
-	    // Remove duplicate vertex that might have been added by
-	    // replaceMovedVertex.  This is done after the unzorro checks.
-	    function removeDuplicateVertices(wayId, graph) {
-	        var way = graph.entity(wayId);
-	        var epsilon = 1e-6;
-	        var prev, curr;
-
-	        function isInteresting(node, graph) {
-	            return graph.parentWays(node).length > 1 ||
-	                graph.parentRelations(node).length ||
-	                node.hasInterestingTags();
-	        }
-
-	        for (var i = 0; i < way.nodes.length; i++) {
-	            curr = graph.entity(way.nodes[i]);
-
-	            if (prev && curr && geoVecEqual(prev.loc, curr.loc, epsilon)) {
-	                if (!isInteresting(prev, graph)) {
-	                    way = way.removeNode(prev.id);
-	                    graph = graph.replace(way).remove(prev);
-	                } else if (!isInteresting(curr, graph)) {
-	                    way = way.removeNode(curr.id);
-	                    graph = graph.replace(way).remove(curr);
-	                }
-	            }
-
-	            prev = curr;
-	        }
-
-	        return graph;
-	    }
-
-
-	    // Reorder nodes around intersections that have moved..
-	    //
-	    //  Start:                way1.nodes: b,e         (moving)
-	    //  a - b - c ----- d     way2.nodes: a,b,c,d     (static)
-	    //      |                 vertex: b
-	    //      e                 isEP1: true,  isEP2, false
-	    //
-	    //  way1 `b,e` moved here:
-	    //  a ----- c = b - d
-	    //              |
-	    //              e
-	    //
-	    //  reorder nodes         way1.nodes: b,e
-	    //  a ----- c - b - d     way2.nodes: a,c,b,d
-	    //              |
-	    //              e
-	    //
-	    function unZorroIntersection(intersection, graph) {
-	        var vertex = graph.entity(intersection.nodeId);
-	        var way1 = graph.entity(intersection.movedId);
-	        var way2 = graph.entity(intersection.unmovedId);
-	        var isEP1 = intersection.movedIsEP;
-	        var isEP2 = intersection.unmovedIsEP;
-
-	        // don't move the vertex if it is the endpoint of both ways.
-	        if (isEP1 && isEP2) { return graph; }
-
-	        var nodes1 = graph.childNodes(way1).filter(function(n) { return n !== vertex; });
-	        var nodes2 = graph.childNodes(way2).filter(function(n) { return n !== vertex; });
-
-	        if (way1.isClosed() && way1.first() === vertex.id) { nodes1.push(nodes1[0]); }
-	        if (way2.isClosed() && way2.first() === vertex.id) { nodes2.push(nodes2[0]); }
-
-	        var edge1 = !isEP1 && geoChooseEdge(nodes1, projection(vertex.loc), projection);
-	        var edge2 = !isEP2 && geoChooseEdge(nodes2, projection(vertex.loc), projection);
-	        var loc;
-
-	        // snap vertex to nearest edge (or some point between them)..
-	        if (!isEP1 && !isEP2) {
-	            var epsilon = 1e-6, maxIter = 10;
-	            for (var i = 0; i < maxIter; i++) {
-	                loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
-	                edge1 = geoChooseEdge(nodes1, projection(loc), projection);
-	                edge2 = geoChooseEdge(nodes2, projection(loc), projection);
-	                if (Math.abs(edge1.distance - edge2.distance) < epsilon) { break; }
-	            }
-	        } else if (!isEP1) {
-	            loc = edge1.loc;
-	        } else {
-	            loc = edge2.loc;
-	        }
-
-	        graph = graph.replace(vertex.move(loc));
-
-	        // if zorro happened, reorder nodes..
-	        if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
-	            way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
-	            graph = graph.replace(way1);
-	        }
-	        if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
-	            way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
-	            graph = graph.replace(way2);
-	        }
-
-	        return graph;
-	    }
-
-
-	    function cleanupIntersections(graph) {
-	        for (var i = 0; i < cache.intersections.length; i++) {
-	            var obj = cache.intersections[i];
-	            graph = replaceMovedVertex(obj.nodeId, obj.movedId, graph, _delta);
-	            graph = replaceMovedVertex(obj.nodeId, obj.unmovedId, graph, null);
-	            graph = unZorroIntersection(obj, graph);
-	            graph = removeDuplicateVertices(obj.movedId, graph);
-	            graph = removeDuplicateVertices(obj.unmovedId, graph);
-	        }
-
-	        return graph;
-	    }
-
-
-	    // check if moving way endpoint can cross an unmoved way, if so limit delta..
-	    function limitDelta(graph) {
-	        function moveNode(loc) {
-	            return geoVecAdd(projection(loc), _delta);
-	        }
-
-	        for (var i = 0; i < cache.intersections.length; i++) {
-	            var obj = cache.intersections[i];
-
-	            // Don't limit movement if this is vertex joins 2 endpoints..
-	            if (obj.movedIsEP && obj.unmovedIsEP) { continue; }
-	            // Don't limit movement if this vertex is not an endpoint anyway..
-	            if (!obj.movedIsEP) { continue; }
-
-	            var node = graph.entity(obj.nodeId);
-	            var start = projection(node.loc);
-	            var end = geoVecAdd(start, _delta);
-	            var movedNodes = graph.childNodes(graph.entity(obj.movedId));
-	            var movedPath = movedNodes.map(function(n) { return moveNode(n.loc); });
-	            var unmovedNodes = graph.childNodes(graph.entity(obj.unmovedId));
-	            var unmovedPath = unmovedNodes.map(function(n) { return projection(n.loc); });
-	            var hits = geoPathIntersections(movedPath, unmovedPath);
-
-	            for (var j = 0; i < hits.length; i++) {
-	                if (geoVecEqual(hits[j], end)) { continue; }
-	                var edge = geoChooseEdge(unmovedNodes, end, projection);
-	                _delta = geoVecSubtract(projection(edge.loc), start);
-	            }
-	        }
-	    }
-
-
-	    var action = function(graph) {
-	        if (_delta[0] === 0 && _delta[1] === 0) { return graph; }
-
-	        setupCache(graph);
-
-	        if (cache.intersections.length) {
-	            limitDelta(graph);
-	        }
-
-	        for (var i = 0; i < cache.nodes.length; i++) {
-	            var node = graph.entity(cache.nodes[i]);
-	            var start = projection(node.loc);
-	            var end = geoVecAdd(start, _delta);
-	            graph = graph.replace(node.move(projection.invert(end)));
-	        }
-
-	        if (cache.intersections.length) {
-	            graph = cleanupIntersections(graph);
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.delta = function() {
-	        return _delta;
-	    };
-
-
-	    return action;
-	}
-
-	function actionMoveMember(relationId, fromIndex, toIndex) {
-	    return function(graph) {
-	        return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
-	    };
-	}
-
-	function actionMoveNode(nodeID, toLoc) {
-
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var node = graph.entity(nodeID);
-	        return graph.replace(
-	            node.move(geoVecInterp(node.loc, toLoc, t))
-	        );
-	    };
-
-	    action.transitionable = true;
-
-	    return action;
-	}
-
-	function actionNoop() {
-	    return function(graph) {
-	        return graph;
-	    };
-	}
-
-	function actionOrthogonalize(wayID, projection, vertexID, degThresh, ep) {
-	    var epsilon = ep || 1e-4;
-	    var threshold = degThresh || 13;  // degrees within right or straight to alter
-
-	    // We test normalized dot products so we can compare as cos(angle)
-	    var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-	    var upperThreshold = Math.cos(threshold * Math.PI / 180);
-
-
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var way = graph.entity(wayID);
-	        way = way.removeNode('');   // sanity check - remove any consecutive duplicates
-
-	        if (way.tags.nonsquare) {
-	            var tags = Object.assign({}, way.tags);
-	            // since we're squaring, remove indication that this is physically unsquare
-	            delete tags.nonsquare;
-	            way = way.update({tags: tags});
-	        }
-
-	        graph = graph.replace(way);
-
-	        var isClosed = way.isClosed();
-	        var nodes = graph.childNodes(way).slice();  // shallow copy
-	        if (isClosed) { nodes.pop(); }
-
-	        if (vertexID !== undefined) {
-	            nodes = nodeSubset(nodes, vertexID, isClosed);
-	            if (nodes.length !== 3) { return graph; }
-	        }
-
-	        // note: all geometry functions here use the unclosed node/point/coord list
-
-	        var nodeCount = {};
-	        var points = [];
-	        var corner = { i: 0, dotp: 1 };
-	        var node, point, loc, score, motions, i, j;
-
-	        for (i = 0; i < nodes.length; i++) {
-	            node = nodes[i];
-	            nodeCount[node.id] = (nodeCount[node.id] || 0) + 1;
-	            points.push({ id: node.id, coord: projection(node.loc) });
-	        }
-
-
-	        if (points.length === 3) {   // move only one vertex for right triangle
-	            for (i = 0; i < 1000; i++) {
-	                motions = points.map(calcMotion);
-
-	                points[corner.i].coord = geoVecAdd(points[corner.i].coord, motions[corner.i]);
-	                score = corner.dotp;
-	                if (score < epsilon) {
-	                    break;
-	                }
-	            }
-
-	            node = graph.entity(nodes[corner.i].id);
-	            loc = projection.invert(points[corner.i].coord);
-	            graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-
-	        } else {
-	            var straights = [];
-	            var simplified = [];
-
-	            // Remove points from nearly straight sections..
-	            // This produces a simplified shape to orthogonalize
-	            for (i = 0; i < points.length; i++) {
-	                point = points[i];
-	                var dotp = 0;
-	                if (isClosed || (i > 0 && i < points.length - 1)) {
-	                    var a = points[(i - 1 + points.length) % points.length];
-	                    var b = points[(i + 1) % points.length];
-	                    dotp = Math.abs(geoOrthoNormalizedDotProduct(a.coord, b.coord, point.coord));
-	                }
-
-	                if (dotp > upperThreshold) {
-	                    straights.push(point);
-	                } else {
-	                    simplified.push(point);
-	                }
-	            }
-
-	            // Orthogonalize the simplified shape
-	            var bestPoints = clonePoints(simplified);
-	            var originalPoints = clonePoints(simplified);
-
-	            score = Infinity;
-	            for (i = 0; i < 1000; i++) {
-	                motions = simplified.map(calcMotion);
-
-	                for (j = 0; j < motions.length; j++) {
-	                    simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
-	                }
-	                var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
-	                if (newScore < score) {
-	                    bestPoints = clonePoints(simplified);
-	                    score = newScore;
-	                }
-	                if (score < epsilon) {
-	                    break;
-	                }
-	            }
-
-	            var bestCoords = bestPoints.map(function(p) { return p.coord; });
-	            if (isClosed) { bestCoords.push(bestCoords[0]); }
-
-	            // move the nodes that should move
-	            for (i = 0; i < bestPoints.length; i++) {
-	                point = bestPoints[i];
-	                if (!geoVecEqual(originalPoints[i].coord, point.coord)) {
-	                    node = graph.entity(point.id);
-	                    loc = projection.invert(point.coord);
-	                    graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-	                }
-	            }
-
-	            // move the nodes along straight segments
-	            for (i = 0; i < straights.length; i++) {
-	                point = straights[i];
-	                if (nodeCount[point.id] > 1) { continue; }   // skip self-intersections
-
-	                node = graph.entity(point.id);
-
-	                if (t === 1 &&
-	                    graph.parentWays(node).length === 1 &&
-	                    graph.parentRelations(node).length === 0 &&
-	                    !node.hasInterestingTags()
-	                ) {
-	                    // remove uninteresting points..
-	                    graph = actionDeleteNode(node.id)(graph);
-
-	                } else {
-	                    // move interesting points to the nearest edge..
-	                    var choice = geoVecProject(point.coord, bestCoords);
-	                    if (choice) {
-	                        loc = projection.invert(choice.target);
-	                        graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-	                    }
-	                }
-	            }
-	        }
-
-	        return graph;
-
-
-	        function clonePoints(array) {
-	            return array.map(function(p) {
-	                return { id: p.id, coord: [p.coord[0], p.coord[1]] };
-	            });
-	        }
-
-
-	        function calcMotion(point, i, array) {
-	            // don't try to move the endpoints of a non-closed way.
-	            if (!isClosed && (i === 0 || i === array.length - 1)) { return [0, 0]; }
-	            // don't try to move a node that appears more than once (self intersection)
-	            if (nodeCount[array[i].id] > 1) { return [0, 0]; }
-
-	            var a = array[(i - 1 + array.length) % array.length].coord;
-	            var origin = point.coord;
-	            var b = array[(i + 1) % array.length].coord;
-	            var p = geoVecSubtract(a, origin);
-	            var q = geoVecSubtract(b, origin);
-
-	            var scale = 2 * Math.min(geoVecLength(p), geoVecLength(q));
-	            p = geoVecNormalize(p);
-	            q = geoVecNormalize(q);
-
-	            var dotp = (p[0] * q[0] + p[1] * q[1]);
-	            var val = Math.abs(dotp);
-
-	            if (val < lowerThreshold) {  // nearly orthogonal
-	                corner.i = i;
-	                corner.dotp = val;
-	                var vec = geoVecNormalize(geoVecAdd(p, q));
-	                return geoVecScale(vec, 0.1 * dotp * scale);
-	            }
-
-	            return [0, 0];   // do nothing
-	        }
-	    };
-
-
-	    // if we are only orthogonalizing one vertex,
-	    // get that vertex and the previous and next
-	    function nodeSubset(nodes, vertexID, isClosed) {
-	        var first = isClosed ? 0 : 1;
-	        var last = isClosed ? nodes.length : nodes.length - 1;
-
-	        for (var i = first; i < last; i++) {
-	            if (nodes[i].id === vertexID) {
-	                return [
-	                    nodes[(i - 1 + nodes.length) % nodes.length],
-	                    nodes[i],
-	                    nodes[(i + 1) % nodes.length]
-	                ];
-	            }
-	        }
-
-	        return [];
-	    }
-
-
-	    action.disabled = function(graph) {
-	        var way = graph.entity(wayID);
-	        way = way.removeNode('');  // sanity check - remove any consecutive duplicates
-	        graph = graph.replace(way);
-
-	        var isClosed = way.isClosed();
-	        var nodes = graph.childNodes(way).slice();  // shallow copy
-	        if (isClosed) { nodes.pop(); }
-
-	        var allowStraightAngles = false;
-	        if (vertexID !== undefined) {
-	            allowStraightAngles = true;
-	            nodes = nodeSubset(nodes, vertexID, isClosed);
-	            if (nodes.length !== 3) { return 'end_vertex'; }
-	        }
-
-	        var coords = nodes.map(function(n) { return projection(n.loc); });
-	        var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
-
-	        if (score === null) {
-	            return 'not_squarish';
-	        } else if (score === 0) {
-	            return 'square_enough';
-	        } else {
-	            return false;
-	        }
-	    };
-
-
-	    action.transitionable = true;
-
-	    return action;
-	}
-
-	// `actionRestrictTurn` creates a turn restriction relation.
-	//
-	// `turn` must be an `osmTurn` object
-	// see osm/intersection.js, pathToTurn()
-	//
-	// This specifies a restriction of type `restriction` when traveling from
-	// `turn.from.way` toward `turn.to.way` via `turn.via.node` OR `turn.via.ways`.
-	// (The action does not check that these entities form a valid intersection.)
-	//
-	// From, to, and via ways should be split before calling this action.
-	// (old versions of the code would split the ways here, but we no longer do it)
-	//
-	// For testing convenience, accepts a restrictionID to assign to the new
-	// relation. Normally, this will be undefined and the relation will
-	// automatically be assigned a new ID.
-	//
-	function actionRestrictTurn(turn, restrictionType, restrictionID) {
-
-	    return function(graph) {
-	        var fromWay = graph.entity(turn.from.way);
-	        var toWay = graph.entity(turn.to.way);
-	        var viaNode = turn.via.node && graph.entity(turn.via.node);
-	        var viaWays = turn.via.ways && turn.via.ways.map(function(id) { return graph.entity(id); });
-	        var members = [];
-
-	        members.push({ id: fromWay.id, type: 'way',  role: 'from' });
-
-	        if (viaNode) {
-	            members.push({ id: viaNode.id,  type: 'node', role: 'via' });
-	        } else if (viaWays) {
-	            viaWays.forEach(function(viaWay) {
-	                members.push({ id: viaWay.id,  type: 'way', role: 'via' });
-	            });
-	        }
-
-	        members.push({ id: toWay.id, type: 'way',  role: 'to' });
-
-	        return graph.replace(osmRelation({
-	            id: restrictionID,
-	            tags: {
-	                type: 'restriction',
-	                restriction: restrictionType
-	            },
-	            members: members
-	        }));
-	    };
-	}
-
-	function actionRevert(id) {
-	    var action = function(graph) {
-	        var entity = graph.hasEntity(id),
-	            base = graph.base().entities[id];
-
-	        if (entity && !base) {    // entity will be removed..
-	            if (entity.type === 'node') {
-	                graph.parentWays(entity)
-	                    .forEach(function(parent) {
-	                        parent = parent.removeNode(id);
-	                        graph = graph.replace(parent);
-
-	                        if (parent.isDegenerate()) {
-	                            graph = actionDeleteWay(parent.id)(graph);
-	                        }
-	                    });
-	            }
-
-	            graph.parentRelations(entity)
-	                .forEach(function(parent) {
-	                    parent = parent.removeMembersWithID(id);
-	                    graph = graph.replace(parent);
-
-	                    if (parent.isDegenerate()) {
-	                        graph = actionDeleteRelation(parent.id)(graph);
-	                    }
-	                });
-	        }
-
-	        return graph.revert(id);
-	    };
-
-	    return action;
-	}
-
-	function actionRotate(rotateIds, pivot, angle, projection) {
-
-	    var action = function(graph) {
-	        return graph.update(function(graph) {
-	            utilGetAllNodes(rotateIds, graph).forEach(function(node) {
-	                var point = geoRotate([projection(node.loc)], angle, pivot)[0];
-	                graph = graph.replace(node.move(projection.invert(point)));
-	            });
-	        });
-	    };
-
-	    return action;
-	}
-
-	/* Align nodes along their common axis */
-	function actionStraightenNodes(nodeIDs, projection) {
-
-	    function positionAlongWay(a, o, b) {
-	        return geoVecDot(a, b, o) / geoVecDot(b, b, o);
-	    }
-
-	    // returns the endpoints of the long axis of symmetry of the `points` bounding rect 
-	    function getEndpoints(points) {
-	        var ssr = geoGetSmallestSurroundingRectangle(points);
-
-	        // Choose line pq = axis of symmetry.
-	        // The shape's surrounding rectangle has 2 axes of symmetry.
-	        // Snap points to the long axis
-	        var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2 ];
-	        var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2 ];
-	        var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2 ];
-	        var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2 ];
-
-	        var isLong = (geoVecLength(p1, q1) > geoVecLength(p2, q2));
-	        if (isLong) {
-	            return [p1, q1];
-	        }
-	        return [p2, q2];
-	    }
-
-
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var nodes = nodeIDs.map(function(id) { return graph.entity(id); });
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var endpoints = getEndpoints(points);
-	        var startPoint = endpoints[0];
-	        var endPoint = endpoints[1];
-
-	        // Move points onto the line connecting the endpoints
-	        for (var i = 0; i < points.length; i++) {
-	            var node = nodes[i];
-	            var point = points[i];
-	            var u = positionAlongWay(point, startPoint, endPoint);
-	            var point2 = geoVecInterp(startPoint, endPoint, u);
-	            var loc2 = projection.invert(point2);
-	            graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.disabled = function(graph) {
-
-	        var nodes = nodeIDs.map(function(id) { return graph.entity(id); });
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var endpoints = getEndpoints(points);
-	        var startPoint = endpoints[0];
-	        var endPoint = endpoints[1];
-
-	        var maxDistance = 0;
-
-	        for (var i = 0; i < points.length; i++) {
-	            var point = points[i];
-	            var u = positionAlongWay(point, startPoint, endPoint);
-	            var p = geoVecInterp(startPoint, endPoint, u);
-	            var dist = geoVecLength(p, point);
-
-	            if (!isNaN(dist) && dist > maxDistance) {
-	                maxDistance = dist;
-	            }
-	        }
-
-	        if (maxDistance < 0.0001) {
-	            return 'straight_enough';
-	        }
-	    };
-
-
-	    action.transitionable = true;
-
-
-	    return action;
-	}
-
-	/*
-	 * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
-	 */
-	function actionStraightenWay(selectedIDs, projection) {
-
-	    function positionAlongWay(a, o, b) {
-	        return geoVecDot(a, b, o) / geoVecDot(b, b, o);
-	    }
-
-	    // Return all selected ways as a continuous, ordered array of nodes
-	    function allNodes(graph) {
-	        var nodes = [];
-	        var startNodes = [];
-	        var endNodes = [];
-	        var remainingWays = [];
-	        var selectedWays = selectedIDs.filter(function(w) {
-	            return graph.entity(w).type === 'way';
-	        });
-	        var selectedNodes = selectedIDs.filter(function(n) {
-	            return graph.entity(n).type === 'node';
-	        });
-
-	        for (var i = 0; i < selectedWays.length; i++) {
-	            var way = graph.entity(selectedWays[i]);
-	            nodes = way.nodes.slice(0);
-	            remainingWays.push(nodes);
-	            startNodes.push(nodes[0]);
-	            endNodes.push(nodes[nodes.length-1]);
-	        }
-
-	        // Remove duplicate end/startNodes (duplicate nodes cannot be at the line end,
-	        //   and need to be removed so currNode difference calculation below works)
-	        // i.e. ["n-1", "n-1", "n-2"] => ["n-2"]
-	        startNodes = startNodes.filter(function(n) {
-	            return startNodes.indexOf(n) === startNodes.lastIndexOf(n);
-	        });
-	        endNodes = endNodes.filter(function(n) {
-	            return endNodes.indexOf(n) === endNodes.lastIndexOf(n);
-	        });
-
-	        // Choose the initial endpoint to start from
-	        var currNode = utilArrayDifference(startNodes, endNodes)
-	            .concat(utilArrayDifference(endNodes, startNodes))[0];
-	        var nextWay = [];
-	        nodes = [];
-
-	        // Create nested function outside of loop to avoid "function in loop" lint error
-	        var getNextWay = function(currNode, remainingWays) {
-	            return remainingWays.filter(function(way) {
-	                return way[0] === currNode || way[way.length-1] === currNode;
-	            })[0];
-	        };
-
-	        // Add nodes to end of nodes array, until all ways are added
-	        while (remainingWays.length) {
-	            nextWay = getNextWay(currNode, remainingWays);
-	            remainingWays = utilArrayDifference(remainingWays, [nextWay]);
-
-	            if (nextWay[0] !== currNode) {
-	                nextWay.reverse();
-	            }
-	            nodes = nodes.concat(nextWay);
-	            currNode = nodes[nodes.length-1];
-	        }
-
-	        // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
-	        if (selectedNodes.length === 2) {
-	            var startNodeIdx = nodes.indexOf(selectedNodes[0]);
-	            var endNodeIdx = nodes.indexOf(selectedNodes[1]);
-	            var sortedStartEnd = [startNodeIdx, endNodeIdx];
-
-	            sortedStartEnd.sort(function(a, b) { return a - b; });
-	            nodes = nodes.slice(sortedStartEnd[0], sortedStartEnd[1]+1);
-	        }
-
-	        return nodes.map(function(n) { return graph.entity(n); });
-	    }
-
-	    function shouldKeepNode(node, graph) {
-	        return graph.parentWays(node).length > 1 ||
-	            graph.parentRelations(node).length ||
-	            node.hasInterestingTags();
-	    }
-
-
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var nodes = allNodes(graph);
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var startPoint = points[0];
-	        var endPoint = points[points.length-1];
-	        var toDelete = [];
-	        var i;
-
-	        for (i = 1; i < points.length-1; i++) {
-	            var node = nodes[i];
-	            var point = points[i];
-
-	            if (t < 1 || shouldKeepNode(node, graph)) {
-	                var u = positionAlongWay(point, startPoint, endPoint);
-	                var p = geoVecInterp(startPoint, endPoint, u);
-	                var loc2 = projection.invert(p);
-	                graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
-
-	            } else {
-	                // safe to delete
-	                if (toDelete.indexOf(node) === -1) {
-	                    toDelete.push(node);
-	                }
-	            }
-	        }
-
-	        for (i = 0; i < toDelete.length; i++) {
-	            graph = actionDeleteNode(toDelete[i].id)(graph);
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.disabled = function(graph) {
-	        // check way isn't too bendy
-	        var nodes = allNodes(graph);
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var startPoint = points[0];
-	        var endPoint = points[points.length-1];
-	        var threshold = 0.2 * geoVecLength(startPoint, endPoint);
-	        var i;
-
-	        if (threshold === 0) {
-	            return 'too_bendy';
-	        }
-
-	        var maxDistance = 0;
-
-	        for (i = 1; i < points.length - 1; i++) {
-	            var point = points[i];
-	            var u = positionAlongWay(point, startPoint, endPoint);
-	            var p = geoVecInterp(startPoint, endPoint, u);
-	            var dist = geoVecLength(p, point);
-
-	            // to bendy if point is off by 20% of total start/end distance in projected space
-	            if (isNaN(dist) || dist > threshold) {
-	                return 'too_bendy';
-	            } else if (dist > maxDistance) {
-	                maxDistance = dist;
-	            }
-	        }
-
-	        var keepingAllNodes = nodes.every(function(node, i) {
-	            return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
-	        });
-
-	        if (maxDistance < 0.0001 &&
-	            // Allow straightening even if already straight in order to remove extraneous nodes
-	            keepingAllNodes) {
-	            return 'straight_enough';
-	        }
-	    };
-
-	    action.transitionable = true;
-
-
-	    return action;
-	}
-
-	// `actionUnrestrictTurn` deletes a turn restriction relation.
-	//
-	// `turn` must be an `osmTurn` object with a `restrictionID` property.
-	// see osm/intersection.js, pathToTurn()
-	//
-	function actionUnrestrictTurn(turn) {
-	    return function(graph) {
-	        return actionDeleteRelation(turn.restrictionID)(graph);
-	    };
-	}
-
-	/* Reflect the given area around its axis of symmetry */
-	function actionReflect(reflectIds, projection) {
-	    var _useLongAxis = true;
-
-
-	    var action = function(graph, t) {
-	        if (t === null || !isFinite(t)) { t = 1; }
-	        t = Math.min(Math.max(+t, 0), 1);
-
-	        var nodes = utilGetAllNodes(reflectIds, graph);
-	        var points = nodes.map(function(n) { return projection(n.loc); });
-	        var ssr = geoGetSmallestSurroundingRectangle(points);
-
-	        // Choose line pq = axis of symmetry.
-	        // The shape's surrounding rectangle has 2 axes of symmetry.
-	        // Reflect across the longer axis by default.
-	        var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2 ];
-	        var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2 ];
-	        var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2 ];
-	        var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2 ];
-	        var p, q;
-
-	        var isLong = (geoVecLength(p1, q1) > geoVecLength(p2, q2));
-	        if ((_useLongAxis && isLong) || (!_useLongAxis && !isLong)) {
-	            p = p1;
-	            q = q1;
-	        } else {
-	            p = p2;
-	            q = q2;
-	        }
-
-	        // reflect c across pq
-	        // http://math.stackexchange.com/questions/65503/point-reflection-over-a-line
-	        var dx = q[0] - p[0];
-	        var dy = q[1] - p[1];
-	        var a = (dx * dx - dy * dy) / (dx * dx + dy * dy);
-	        var b = 2 * dx * dy / (dx * dx + dy * dy);
-	        for (var i = 0; i < nodes.length; i++) {
-	            var node = nodes[i];
-	            var c = projection(node.loc);
-	            var c2 = [
-	                a * (c[0] - p[0]) + b * (c[1] - p[1]) + p[0],
-	                b * (c[0] - p[0]) - a * (c[1] - p[1]) + p[1]
-	            ];
-	            var loc2 = projection.invert(c2);
-	            node = node.move(geoVecInterp(node.loc, loc2, t));
-	            graph = graph.replace(node);
-	        }
-
-	        return graph;
-	    };
-
-
-	    action.useLongAxis = function(val) {
-	        if (!arguments.length) { return _useLongAxis; }
-	        _useLongAxis = val;
-	        return action;
-	    };
-
-
-	    action.transitionable = true;
-
-
-	    return action;
-	}
-
-	function actionUpgradeTags(entityId, oldTags, replaceTags) {
-
-	    return function(graph) {
-	        var entity = graph.entity(entityId);
-	        var tags = Object.assign({}, entity.tags);  // shallow copy
-	        var transferValue;
-	        var semiIndex;
-
-	        for (var oldTagKey in oldTags) {
-	            if (oldTags[oldTagKey] === '*') {
-	                transferValue = tags[oldTagKey];
-	                delete tags[oldTagKey];
-	            } else {
-	                var vals = tags[oldTagKey].split(';').filter(Boolean);
-	                var oldIndex = vals.indexOf(oldTags[oldTagKey]);
-	                if (vals.length === 1 || oldIndex === -1) {
-	                    delete tags[oldTagKey];
-	                } else {
-	                    if (replaceTags && replaceTags[oldTagKey]) {
-	                        // replacing a value within a semicolon-delimited value, note the index
-	                        semiIndex = oldIndex;
-	                    }
-	                    vals.splice(oldIndex, 1);
-	                    tags[oldTagKey] = vals.join(';');
-	                }
-	            }
-	        }
-
-	        if (replaceTags) {
-	            for (var replaceKey in replaceTags) {
-	                var replaceValue = replaceTags[replaceKey];
-	                if (replaceValue === '*') {
-	                    if (tags[replaceKey] && tags[replaceKey] !== 'no') {
-	                        // allow any pre-existing value except `no` (troll tag)
-	                        continue;
-	                    } else {
-	                        // otherwise assume `yes` is okay
-	                        tags[replaceKey] = 'yes';
-	                    }
-	                } else if (replaceValue === '$1') {
-	                    tags[replaceKey] = transferValue;
-	                } else {
-	                    if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
-	                        // don't override preexisting values
-	                        var existingVals = tags[replaceKey].split(';').filter(Boolean);
-	                        if (existingVals.indexOf(replaceValue) === -1) {
-	                            existingVals.splice(semiIndex, 0, replaceValue);
-	                            tags[replaceKey] = existingVals.join(';');
-	                        }
-	                    } else {
-	                        tags[replaceKey] = replaceValue;
-	                    }
-	                }
-	            }
-	        }
-
-	        return graph.replace(entity.update({ tags: tags }));
-	    };
-	}
-
-	function behaviorEdit(context) {
-
-	    function behavior() {
-	        context.map()
-	            .minzoom(context.minEditableZoom());
-	    }
-
-
-	    behavior.off = function() {
-	        context.map()
-	            .minzoom(0);
-	    };
-
-	    return behavior;
-	}
-
-	/*
-	   The hover behavior adds the `.hover` class on pointerover to all elements to which
-	   the identical datum is bound, and removes it on pointerout.
-
-	   The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
-	   representation may consist of several elements scattered throughout the DOM hierarchy.
-	   Only one of these elements can have the :hover pseudo-class, but all of them will
-	   have the .hover class.
-	 */
-	function behaviorHover(context) {
-	    var dispatch$1 = dispatch('hover');
-	    var _selection = select(null);
-	    var _newNodeId = null;
-	    var _initialNodeID = null;
-	    var _altDisables;
-	    var _ignoreVertex;
-	    var _targets = [];
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-
-	    function keydown() {
-	        if (_altDisables && event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            _selection.selectAll('.hover')
-	                .classed('hover-suppressed', true)
-	                .classed('hover', false);
-
-	            _selection
-	                .classed('hover-disabled', true);
-
-	            dispatch$1.call('hover', this, null);
-	        }
-	    }
-
-
-	    function keyup() {
-	        if (_altDisables && event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            _selection.selectAll('.hover-suppressed')
-	                .classed('hover-suppressed', false)
-	                .classed('hover', true);
-
-	            _selection
-	                .classed('hover-disabled', false);
-
-	            dispatch$1.call('hover', this, _targets);
-	        }
-	    }
-
-
-	    function behavior(selection) {
-	        _selection = selection;
-
-	        _targets = [];
-
-	        if (_initialNodeID) {
-	            _newNodeId = _initialNodeID;
-	            _initialNodeID = null;
-	        } else {
-	            _newNodeId = null;
-	        }
-
-	        _selection
-	            .on(_pointerPrefix + 'over.hover', pointerover)
-	            .on(_pointerPrefix + 'out.hover', pointerout)
-	            // treat pointerdown as pointerover for touch devices
-	            .on(_pointerPrefix + 'down.hover', pointerover);
-
-	        select(window)
-	            .on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true)
-	            .on('keydown.hover', keydown)
-	            .on('keyup.hover', keyup);
-
-
-	        function eventTarget() {
-	            var datum = event.target && event.target.__data__;
-	            if (typeof datum !== 'object') { return null; }
-	            if (!(datum instanceof osmEntity) && datum.properties && (datum.properties.entity instanceof osmEntity)) {
-	                return datum.properties.entity;
-	            }
-	            return datum;
-	        }
-
-	        function pointerover() {
-	            // ignore mouse hovers with buttons pressed unless dragging
-	            if (context.mode().id.indexOf('drag') === -1 &&
-	                (!event.pointerType || event.pointerType === 'mouse') &&
-	                event.buttons) { return; }
-
-	            var target = eventTarget();
-	            if (target && _targets.indexOf(target) === -1) {
-	                _targets.push(target);
-	                updateHover(_targets);
-	            }
-	        }
-
-	        function pointerout() {
-
-	            var target = eventTarget();
-	            var index = _targets.indexOf(target);
-	            if (index !== -1) {
-	                _targets.splice(index);
-	                updateHover(_targets);
-	            }
-	        }
-
-	        function allowsVertex(d) {
-	            return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-	        }
-
-	        function modeAllowsHover(target) {
-	            var mode = context.mode();
-	            if (mode.id === 'add-point') {
-	                return mode.preset.matchGeometry('vertex') ||
-	                    (target.type !== 'way' && target.geometry(context.graph()) !== 'vertex');
-	            }
-	            return true;
-	        }
-
-	        function updateHover(targets) {
-
-	            _selection.selectAll('.hover')
-	                .classed('hover', false);
-	            _selection.selectAll('.hover-suppressed')
-	                .classed('hover-suppressed', false);
-
-	            var mode = context.mode();
-
-	            if (!_newNodeId && (mode.id === 'draw-line' || mode.id === 'draw-area')) {
-	                var node = targets.find(function(target) {
-	                    return target instanceof osmEntity && target.type === 'node';
-	                });
-	                _newNodeId = node && node.id;
-	            }
-
-	            targets = targets.filter(function(datum) {
-	                if (datum instanceof osmEntity) {
-	                    // If drawing a way, don't hover on a node that was just placed. #3974
-	                    return datum.id !== _newNodeId &&
-	                        (datum.type !== 'node' || !_ignoreVertex || allowsVertex(datum)) &&
-	                        modeAllowsHover(datum);
-	                }
-	                return true;
-	            });
-
-	            var selector = '';
-
-	            for (var i in targets) {
-	                var datum = targets[i];
-
-	                // What are we hovering over?
-	                if (datum.__featurehash__) {
-	                    // hovering custom data
-	                    selector += ', .data' + datum.__featurehash__;
-
-	                } else if (datum instanceof QAItem) {
-	                    selector += ', .' + datum.service + '.itemId-' + datum.id;
-
-	                } else if (datum instanceof osmNote) {
-	                    selector += ', .note-' + datum.id;
-
-	                } else if (datum instanceof osmEntity) {
-	                    selector += ', .' + datum.id;
-	                    if (datum.type === 'relation') {
-	                        for (var j in datum.members) {
-	                            selector += ', .' + datum.members[j].id;
-	                        }
-	                    }
-	                }
-	            }
-
-	            var suppressed = _altDisables && event && event.altKey;
-
-	            if (selector.trim().length) {
-	                // remove the first comma
-	                selector = selector.slice(1);
-	                _selection.selectAll(selector)
-	                    .classed(suppressed ? 'hover-suppressed' : 'hover', true);
-	            }
-
-	            dispatch$1.call('hover', this, !suppressed && targets);
-	        }
-	    }
-
-
-	    behavior.off = function(selection) {
-	        selection.selectAll('.hover')
-	            .classed('hover', false);
-	        selection.selectAll('.hover-suppressed')
-	            .classed('hover-suppressed', false);
-	        selection
-	            .classed('hover-disabled', false);
-
-	        selection
-	            .on(_pointerPrefix + 'over.hover', null)
-	            .on(_pointerPrefix + 'out.hover', null)
-	            .on(_pointerPrefix + 'down.hover', null);
-
-	        select(window)
-	            .on(_pointerPrefix + 'up.hover pointercancel.hover', null, true)
-	            .on('keydown.hover', null)
-	            .on('keyup.hover', null);
-	    };
-
-
-	    behavior.altDisables = function(val) {
-	        if (!arguments.length) { return _altDisables; }
-	        _altDisables = val;
-	        return behavior;
-	    };
-
-	    behavior.ignoreVertex = function(val) {
-	        if (!arguments.length) { return _ignoreVertex; }
-	        _ignoreVertex = val;
-	        return behavior;
-	    };
-
-	    behavior.initialNodeID = function(nodeId) {
-	        _initialNodeID = nodeId;
-	        return behavior;
-	    };
-
-	    return utilRebind(behavior, dispatch$1, 'on');
-	}
-
-	var _disableSpace = false;
-	var _lastSpace = null;
-
-
-	function behaviorDraw(context) {
-	    var dispatch$1 = dispatch(
-	        'move', 'down', 'downcancel', 'click', 'clickWay', 'clickNode', 'undo', 'cancel', 'finish'
-	    );
-
-	    var keybinding = utilKeybinding('draw');
-
-	    var _hover = behaviorHover(context)
-	        .altDisables(true)
-	        .ignoreVertex(true)
-	        .on('hover', context.ui().sidebar.hover);
-	    var _edit = behaviorEdit(context);
-
-	    var _closeTolerance = 4;
-	    var _tolerance = 12;
-	    var _mouseLeave = false;
-	    var _lastMouse = null;
-	    var _lastPointerUpEvent;
-
-	    var _downPointer;
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-
-	    // related code
-	    // - `mode/drag_node.js` `datum()`
-	    function datum() {
-	        var mode = context.mode();
-	        var isNote = mode && (mode.id.indexOf('note') !== -1);
-	        if (event.altKey || isNote) { return {}; }
-
-	        var element;
-	        if (event.type === 'keydown') {
-	            element = _lastMouse && _lastMouse.target;
-	        } else {
-	            element = event.target;
-	        }
-
-	        // When drawing, snap only to touch targets..
-	        // (this excludes area fills and active drawing elements)
-	        var d = element.__data__;
-	        return (d && d.properties && d.properties.target) ? d : {};
-	    }
-
-	    function pointerdown() {
-
-	        if (_downPointer) { return; }
-
-	        var pointerLocGetter = utilFastMouse(this);
-	        _downPointer = {
-	            id: event.pointerId || 'mouse',
-	            pointerLocGetter: pointerLocGetter,
-	            downTime: +new Date(),
-	            downLoc: pointerLocGetter(event)
-	        };
-
-	        dispatch$1.call('down', this, datum());
-	    }
-
-	    function pointerup() {
-
-	        if (!_downPointer || _downPointer.id !== (event.pointerId || 'mouse')) { return; }
-
-	        var downPointer = _downPointer;
-	        _downPointer = null;
-
-	        _lastPointerUpEvent = event;
-
-	        if (downPointer.isCancelled) { return; }
-
-	        var t2 = +new Date();
-	        var p2 = downPointer.pointerLocGetter(event);
-	        var dist = geoVecLength(downPointer.downLoc, p2);
-
-	        if (dist < _closeTolerance || (dist < _tolerance && (t2 - downPointer.downTime) < 500)) {
-	            // Prevent a quick second click
-	            select(window).on('click.draw-block', function() {
-	                event.stopPropagation();
-	            }, true);
-
-	            context.map().dblclickZoomEnable(false);
-
-	            window.setTimeout(function() {
-	                context.map().dblclickZoomEnable(true);
-	                select(window).on('click.draw-block', null);
-	            }, 500);
-
-	            click(p2);
-	        }
-	    }
-
-	    function pointermove() {
-	        if (_downPointer &&
-	            _downPointer.id === (event.pointerId || 'mouse') &&
-	            !_downPointer.isCancelled) {
-	            var p2 = _downPointer.pointerLocGetter(event);
-	            var dist = geoVecLength(_downPointer.downLoc, p2);
-	            if (dist >= _closeTolerance) {
-	                _downPointer.isCancelled = true;
-	                dispatch$1.call('downcancel', this);
-	            }
-	        }
-
-	        if ((event.pointerType && event.pointerType !== 'mouse') ||
-	            event.buttons ||
-	            _downPointer) { return; }
-
-	        // HACK: Mobile Safari likes to send one or more `mouse` type pointermove
-	        // events immediately after non-mouse pointerup events; detect and ignore them.
-	        if (_lastPointerUpEvent &&
-	            _lastPointerUpEvent.pointerType !== 'mouse' &&
-	            event.timeStamp - _lastPointerUpEvent.timeStamp < 100) { return; }
-
-	        _lastMouse = event;
-	        dispatch$1.call('move', this, datum());
-	    }
-
-	    function pointercancel() {
-	        if (_downPointer &&
-	            _downPointer.id === (event.pointerId || 'mouse')) {
-
-	            if (!_downPointer.isCancelled) {
-	                dispatch$1.call('downcancel', this);
-	            }
-	            _downPointer = null;
-	        }
-	    }
-
-	    function mouseenter() {
-	        _mouseLeave = false;
-	    }
-
-	    function mouseleave() {
-	        _mouseLeave = true;
-	    }
-
-	    function allowsVertex(d) {
-	        return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-	    }
-
-	    // related code
-	    // - `mode/drag_node.js`     `doMove()`
-	    // - `behavior/draw.js`      `click()`
-	    // - `behavior/draw_way.js`  `move()`
-	    function click(loc) {
-	        var d = datum();
-	        var target = d && d.properties && d.properties.entity;
-
-	        var mode = context.mode();
-
-	        if (target && target.type === 'node' && allowsVertex(target)) {   // Snap to a node
-	            dispatch$1.call('clickNode', this, target, d);
-	            return;
-
-	        } else if (target && target.type === 'way' && (mode.id !== 'add-point' || mode.preset.matchGeometry('vertex'))) {   // Snap to a way
-	            var choice = geoChooseEdge(
-	                context.graph().childNodes(target), loc, context.projection, context.activeID()
-	            );
-	            if (choice) {
-	                var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
-	                dispatch$1.call('clickWay', this, choice.loc, edge, d);
-	                return;
-	            }
-	        } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
-	            var locLatLng = context.projection.invert(loc);
-	            dispatch$1.call('click', this, locLatLng, d);
-	        }
-
-	    }
-
-	    // treat a spacebar press like a click
-	    function space() {
-	        event.preventDefault();
-	        event.stopPropagation();
-
-	        var currSpace = context.map().mouse();
-	        if (_disableSpace && _lastSpace) {
-	            var dist = geoVecLength(_lastSpace, currSpace);
-	            if (dist > _tolerance) {
-	                _disableSpace = false;
-	            }
-	        }
-
-	        if (_disableSpace || _mouseLeave || !_lastMouse) { return; }
-
-	        // user must move mouse or release space bar to allow another click
-	        _lastSpace = currSpace;
-	        _disableSpace = true;
-
-	        select(window).on('keyup.space-block', function() {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            _disableSpace = false;
-	            select(window).on('keyup.space-block', null);
-	        });
-
-	        // get the current mouse position
-	        var loc = context.map().mouse() ||
-	            // or the map center if the mouse has never entered the map
-	            context.projection(context.map().center());
-	        click(loc);
-	    }
-
-
-	    function backspace() {
-	        event.preventDefault();
-	        dispatch$1.call('undo');
-	    }
-
-
-	    function del() {
-	        event.preventDefault();
-	        dispatch$1.call('cancel');
-	    }
-
-
-	    function ret() {
-	        event.preventDefault();
-	        dispatch$1.call('finish');
-	    }
-
-
-	    function behavior(selection) {
-	        context.install(_hover);
-	        context.install(_edit);
-
-	        _downPointer = null;
-
-	        keybinding
-	            .on('⌫', backspace)
-	            .on('⌦', del)
-	            .on('⎋', ret)
-	            .on('↩', ret)
-	            .on('space', space)
-	            .on('⌥space', space);
-
-	        selection
-	            .on('mouseenter.draw', mouseenter)
-	            .on('mouseleave.draw', mouseleave)
-	            .on(_pointerPrefix + 'down.draw', pointerdown)
-	            .on(_pointerPrefix + 'move.draw', pointermove);
-
-	        select(window)
-	            .on(_pointerPrefix + 'up.draw', pointerup, true)
-	            .on('pointercancel.draw', pointercancel, true);
-
-	        select(document)
-	            .call(keybinding);
-
-	        return behavior;
-	    }
-
-
-	    behavior.off = function(selection) {
-	        context.ui().sidebar.hover.cancel();
-	        context.uninstall(_hover);
-	        context.uninstall(_edit);
-
-	        selection
-	            .on('mouseenter.draw', null)
-	            .on('mouseleave.draw', null)
-	            .on(_pointerPrefix + 'down.draw', null)
-	            .on(_pointerPrefix + 'move.draw', null);
-
-	        select(window)
-	            .on(_pointerPrefix + 'up.draw', null)
-	            .on('pointercancel.draw', null);
-	            // note: keyup.space-block, click.draw-block should remain
-
-	        select(document)
-	            .call(keybinding.unbind);
-	    };
-
-
-	    behavior.hover = function() {
-	        return _hover;
-	    };
-
-
-	    return utilRebind(behavior, dispatch$1, 'on');
-	}
-
-	function initRange(domain, range) {
-	  switch (arguments.length) {
-	    case 0: break;
-	    case 1: this.range(domain); break;
-	    default: this.range(range).domain(domain); break;
-	  }
-	  return this;
-	}
-
-	var prefix = "$";
-
-	function Map$1() {}
-
-	Map$1.prototype = map$2.prototype = {
-	  constructor: Map$1,
-	  has: function(key) {
-	    return (prefix + key) in this;
-	  },
-	  get: function(key) {
-	    return this[prefix + key];
-	  },
-	  set: function(key, value) {
-	    this[prefix + key] = value;
-	    return this;
-	  },
-	  remove: function(key) {
-	    var property = prefix + key;
-	    return property in this && delete this[property];
-	  },
-	  clear: function() {
-	    for (var property in this) { if (property[0] === prefix) { delete this[property]; } }
-	  },
-	  keys: function() {
-	    var keys = [];
-	    for (var property in this) { if (property[0] === prefix) { keys.push(property.slice(1)); } }
-	    return keys;
-	  },
-	  values: function() {
-	    var values = [];
-	    for (var property in this) { if (property[0] === prefix) { values.push(this[property]); } }
-	    return values;
-	  },
-	  entries: function() {
-	    var entries = [];
-	    for (var property in this) { if (property[0] === prefix) { entries.push({key: property.slice(1), value: this[property]}); } }
-	    return entries;
-	  },
-	  size: function() {
-	    var size = 0;
-	    for (var property in this) { if (property[0] === prefix) { ++size; } }
-	    return size;
-	  },
-	  empty: function() {
-	    for (var property in this) { if (property[0] === prefix) { return false; } }
-	    return true;
-	  },
-	  each: function(f) {
-	    for (var property in this) { if (property[0] === prefix) { f(this[property], property.slice(1), this); } }
-	  }
-	};
-
-	function map$2(object, f) {
-	  var map = new Map$1;
-
-	  // Copy constructor.
-	  if (object instanceof Map$1) { object.each(function(value, key) { map.set(key, value); }); }
-
-	  // Index array by numeric index or specified key function.
-	  else if (Array.isArray(object)) {
-	    var i = -1,
-	        n = object.length,
-	        o;
-
-	    if (f == null) { while (++i < n) { map.set(i, object[i]); } }
-	    else { while (++i < n) { map.set(f(o = object[i], i, object), o); } }
-	  }
-
-	  // Convert object to map.
-	  else if (object) { for (var key in object) { map.set(key, object[key]); } }
-
-	  return map;
-	}
-
-	function Set$1() {}
-
-	var proto = map$2.prototype;
-
-	Set$1.prototype = set$2.prototype = {
-	  constructor: Set$1,
-	  has: proto.has,
-	  add: function(value) {
-	    value += "";
-	    this[prefix + value] = value;
-	    return this;
-	  },
-	  remove: proto.remove,
-	  clear: proto.clear,
-	  values: proto.keys,
-	  size: proto.size,
-	  empty: proto.empty,
-	  each: proto.each
-	};
-
-	function set$2(object, f) {
-	  var set = new Set$1;
-
-	  // Copy constructor.
-	  if (object instanceof Set$1) { object.each(function(value) { set.add(value); }); }
-
-	  // Otherwise, assume it’s an array.
-	  else if (object) {
-	    var i = -1, n = object.length;
-	    if (f == null) { while (++i < n) { set.add(object[i]); } }
-	    else { while (++i < n) { set.add(f(object[i], i, object)); } }
-	  }
-
-	  return set;
-	}
-
-	var array$1 = Array.prototype;
-
-	var map$3 = array$1.map;
-	var slice$4 = array$1.slice;
-
-	function constant$4(x) {
-	  return function() {
-	    return x;
-	  };
-	}
-
-	function number$1(x) {
-	  return +x;
-	}
-
-	var unit = [0, 1];
-
-	function identity$3(x) {
-	  return x;
-	}
-
-	function normalize(a, b) {
-	  return (b -= (a = +a))
-	      ? function(x) { return (x - a) / b; }
-	      : constant$4(isNaN(b) ? NaN : 0.5);
-	}
-
-	function clamper(domain) {
-	  var a = domain[0], b = domain[domain.length - 1], t;
-	  if (a > b) { t = a, a = b, b = t; }
-	  return function(x) { return Math.max(a, Math.min(b, x)); };
-	}
-
-	// normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
-	// interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
-	function bimap(domain, range, interpolate) {
-	  var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];
-	  if (d1 < d0) { d0 = normalize(d1, d0), r0 = interpolate(r1, r0); }
-	  else { d0 = normalize(d0, d1), r0 = interpolate(r0, r1); }
-	  return function(x) { return r0(d0(x)); };
-	}
-
-	function polymap(domain, range, interpolate) {
-	  var j = Math.min(domain.length, range.length) - 1,
-	      d = new Array(j),
-	      r = new Array(j),
-	      i = -1;
-
-	  // Reverse descending domains.
-	  if (domain[j] < domain[0]) {
-	    domain = domain.slice().reverse();
-	    range = range.slice().reverse();
-	  }
-
-	  while (++i < j) {
-	    d[i] = normalize(domain[i], domain[i + 1]);
-	    r[i] = interpolate(range[i], range[i + 1]);
-	  }
-
-	  return function(x) {
-	    var i = bisectRight(domain, x, 1, j) - 1;
-	    return r[i](d[i](x));
-	  };
-	}
-
-	function copy$1(source, target) {
-	  return target
-	      .domain(source.domain())
-	      .range(source.range())
-	      .interpolate(source.interpolate())
-	      .clamp(source.clamp())
-	      .unknown(source.unknown());
-	}
-
-	function transformer$1() {
-	  var domain = unit,
-	      range = unit,
-	      interpolate$1 = interpolate,
-	      transform,
-	      untransform,
-	      unknown,
-	      clamp = identity$3,
-	      piecewise,
-	      output,
-	      input;
-
-	  function rescale() {
-	    piecewise = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
-	    output = input = null;
-	    return scale;
-	  }
-
-	  function scale(x) {
-	    return isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate$1)))(transform(clamp(x)));
-	  }
-
-	  scale.invert = function(y) {
-	    return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
-	  };
-
-	  scale.domain = function(_) {
-	    return arguments.length ? (domain = map$3.call(_, number$1), clamp === identity$3 || (clamp = clamper(domain)), rescale()) : domain.slice();
-	  };
-
-	  scale.range = function(_) {
-	    return arguments.length ? (range = slice$4.call(_), rescale()) : range.slice();
-	  };
-
-	  scale.rangeRound = function(_) {
-	    return range = slice$4.call(_), interpolate$1 = interpolateRound, rescale();
-	  };
-
-	  scale.clamp = function(_) {
-	    return arguments.length ? (clamp = _ ? clamper(domain) : identity$3, scale) : clamp !== identity$3;
-	  };
-
-	  scale.interpolate = function(_) {
-	    return arguments.length ? (interpolate$1 = _, rescale()) : interpolate$1;
-	  };
-
-	  scale.unknown = function(_) {
-	    return arguments.length ? (unknown = _, scale) : unknown;
-	  };
-
-	  return function(t, u) {
-	    transform = t, untransform = u;
-	    return rescale();
-	  };
-	}
-
-	function continuous(transform, untransform) {
-	  return transformer$1()(transform, untransform);
-	}
-
-	// Computes the decimal coefficient and exponent of the specified number x with
-	// significant digits p, where x is positive and p is in [1, 21] or undefined.
-	// For example, formatDecimal(1.23) returns ["123", 0].
-	function formatDecimal(x, p) {
-	  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) { return null; } // NaN, ±Infinity
-	  var i, coefficient = x.slice(0, i);
-
-	  // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
-	  // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
-	  return [
-	    coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,
-	    +x.slice(i + 1)
-	  ];
-	}
-
-	function exponent(x) {
-	  return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;
-	}
-
-	function formatGroup(grouping, thousands) {
-	  return function(value, width) {
-	    var i = value.length,
-	        t = [],
-	        j = 0,
-	        g = grouping[0],
-	        length = 0;
-
-	    while (i > 0 && g > 0) {
-	      if (length + g + 1 > width) { g = Math.max(1, width - length); }
-	      t.push(value.substring(i -= g, i + g));
-	      if ((length += g + 1) > width) { break; }
-	      g = grouping[j = (j + 1) % grouping.length];
-	    }
-
-	    return t.reverse().join(thousands);
-	  };
-	}
-
-	function formatNumerals(numerals) {
-	  return function(value) {
-	    return value.replace(/[0-9]/g, function(i) {
-	      return numerals[+i];
-	    });
-	  };
-	}
-
-	// [[fill]align][sign][symbol][0][width][,][.precision][~][type]
-	var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
-
-	function formatSpecifier(specifier) {
-	  if (!(match = re.exec(specifier))) { throw new Error("invalid format: " + specifier); }
-	  var match;
-	  return new FormatSpecifier({
-	    fill: match[1],
-	    align: match[2],
-	    sign: match[3],
-	    symbol: match[4],
-	    zero: match[5],
-	    width: match[6],
-	    comma: match[7],
-	    precision: match[8] && match[8].slice(1),
-	    trim: match[9],
-	    type: match[10]
-	  });
-	}
-
-	formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
-
-	function FormatSpecifier(specifier) {
-	  this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
-	  this.align = specifier.align === undefined ? ">" : specifier.align + "";
-	  this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
-	  this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
-	  this.zero = !!specifier.zero;
-	  this.width = specifier.width === undefined ? undefined : +specifier.width;
-	  this.comma = !!specifier.comma;
-	  this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
-	  this.trim = !!specifier.trim;
-	  this.type = specifier.type === undefined ? "" : specifier.type + "";
-	}
-
-	FormatSpecifier.prototype.toString = function() {
-	  return this.fill
-	      + this.align
-	      + this.sign
-	      + this.symbol
-	      + (this.zero ? "0" : "")
-	      + (this.width === undefined ? "" : Math.max(1, this.width | 0))
-	      + (this.comma ? "," : "")
-	      + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0))
-	      + (this.trim ? "~" : "")
-	      + this.type;
-	};
-
-	// Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
-	function formatTrim(s) {
-	  out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
-	    switch (s[i]) {
-	      case ".": i0 = i1 = i; break;
-	      case "0": if (i0 === 0) { i0 = i; } i1 = i; break;
-	      default: if (!+s[i]) { break out; } if (i0 > 0) { i0 = 0; } break;
-	    }
-	  }
-	  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
-	}
-
-	var prefixExponent;
-
-	function formatPrefixAuto(x, p) {
-	  var d = formatDecimal(x, p);
-	  if (!d) { return x + ""; }
-	  var coefficient = d[0],
-	      exponent = d[1],
-	      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
-	      n = coefficient.length;
-	  return i === n ? coefficient
-	      : i > n ? coefficient + new Array(i - n + 1).join("0")
-	      : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i)
-	      : "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!
-	}
-
-	function formatRounded(x, p) {
-	  var d = formatDecimal(x, p);
-	  if (!d) { return x + ""; }
-	  var coefficient = d[0],
-	      exponent = d[1];
-	  return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient
-	      : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1)
-	      : coefficient + new Array(exponent - coefficient.length + 2).join("0");
-	}
-
-	var formatTypes = {
-	  "%": function(x, p) { return (x * 100).toFixed(p); },
-	  "b": function(x) { return Math.round(x).toString(2); },
-	  "c": function(x) { return x + ""; },
-	  "d": function(x) { return Math.round(x).toString(10); },
-	  "e": function(x, p) { return x.toExponential(p); },
-	  "f": function(x, p) { return x.toFixed(p); },
-	  "g": function(x, p) { return x.toPrecision(p); },
-	  "o": function(x) { return Math.round(x).toString(8); },
-	  "p": function(x, p) { return formatRounded(x * 100, p); },
-	  "r": formatRounded,
-	  "s": formatPrefixAuto,
-	  "X": function(x) { return Math.round(x).toString(16).toUpperCase(); },
-	  "x": function(x) { return Math.round(x).toString(16); }
-	};
-
-	function identity$4(x) {
-	  return x;
-	}
-
-	var map$4 = Array.prototype.map,
-	    prefixes = ["y","z","a","f","p","n","µ","m","","k","M","G","T","P","E","Z","Y"];
-
-	function formatLocale(locale) {
-	  var group = locale.grouping === undefined || locale.thousands === undefined ? identity$4 : formatGroup(map$4.call(locale.grouping, Number), locale.thousands + ""),
-	      currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
-	      currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
-	      decimal = locale.decimal === undefined ? "." : locale.decimal + "",
-	      numerals = locale.numerals === undefined ? identity$4 : formatNumerals(map$4.call(locale.numerals, String)),
-	      percent = locale.percent === undefined ? "%" : locale.percent + "",
-	      minus = locale.minus === undefined ? "-" : locale.minus + "",
-	      nan = locale.nan === undefined ? "NaN" : locale.nan + "";
-
-	  function newFormat(specifier) {
-	    specifier = formatSpecifier(specifier);
-
-	    var fill = specifier.fill,
-	        align = specifier.align,
-	        sign = specifier.sign,
-	        symbol = specifier.symbol,
-	        zero = specifier.zero,
-	        width = specifier.width,
-	        comma = specifier.comma,
-	        precision = specifier.precision,
-	        trim = specifier.trim,
-	        type = specifier.type;
-
-	    // The "n" type is an alias for ",g".
-	    if (type === "n") { comma = true, type = "g"; }
-
-	    // The "" type, and any invalid type, is an alias for ".12~g".
-	    else if (!formatTypes[type]) { precision === undefined && (precision = 12), trim = true, type = "g"; }
-
-	    // If zero fill is specified, padding goes after sign and before digits.
-	    if (zero || (fill === "0" && align === "=")) { zero = true, fill = "0", align = "="; }
-
-	    // Compute the prefix and suffix.
-	    // For SI-prefix, the suffix is lazily computed.
-	    var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
-	        suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : "";
-
-	    // What format function should we use?
-	    // Is this an integer type?
-	    // Can this type generate exponential notation?
-	    var formatType = formatTypes[type],
-	        maybeSuffix = /[defgprs%]/.test(type);
-
-	    // Set the default precision if not specified,
-	    // or clamp the specified precision to the supported range.
-	    // For significant precision, it must be in [1, 21].
-	    // For fixed precision, it must be in [0, 20].
-	    precision = precision === undefined ? 6
-	        : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
-	        : Math.max(0, Math.min(20, precision));
-
-	    function format(value) {
-	      var valuePrefix = prefix,
-	          valueSuffix = suffix,
-	          i, n, c;
-
-	      if (type === "c") {
-	        valueSuffix = formatType(value) + valueSuffix;
-	        value = "";
-	      } else {
-	        value = +value;
-
-	        // Determine the sign. -0 is not less than 0, but 1 / -0 is!
-	        var valueNegative = value < 0 || 1 / value < 0;
-
-	        // Perform the initial formatting.
-	        value = isNaN(value) ? nan : formatType(Math.abs(value), precision);
-
-	        // Trim insignificant zeros.
-	        if (trim) { value = formatTrim(value); }
-
-	        // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
-	        if (valueNegative && +value === 0 && sign !== "+") { valueNegative = false; }
-
-	        // Compute the prefix and suffix.
-	        valuePrefix = (valueNegative ? (sign === "(" ? sign : minus) : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
-	        valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : "");
-
-	        // Break the formatted value into the integer “value” part that can be
-	        // grouped, and fractional or exponential “suffix” part that is not.
-	        if (maybeSuffix) {
-	          i = -1, n = value.length;
-	          while (++i < n) {
-	            if (c = value.charCodeAt(i), 48 > c || c > 57) {
-	              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
-	              value = value.slice(0, i);
-	              break;
-	            }
-	          }
-	        }
-	      }
-
-	      // If the fill character is not "0", grouping is applied before padding.
-	      if (comma && !zero) { value = group(value, Infinity); }
-
-	      // Compute the padding.
-	      var length = valuePrefix.length + value.length + valueSuffix.length,
-	          padding = length < width ? new Array(width - length + 1).join(fill) : "";
-
-	      // If the fill character is "0", grouping is applied after padding.
-	      if (comma && zero) { value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; }
-
-	      // Reconstruct the final output based on the desired alignment.
-	      switch (align) {
-	        case "<": value = valuePrefix + value + valueSuffix + padding; break;
-	        case "=": value = valuePrefix + padding + value + valueSuffix; break;
-	        case "^": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;
-	        default: value = padding + valuePrefix + value + valueSuffix; break;
-	      }
-
-	      return numerals(value);
-	    }
-
-	    format.toString = function() {
-	      return specifier + "";
-	    };
-
-	    return format;
-	  }
-
-	  function formatPrefix(specifier, value) {
-	    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
-	        e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
-	        k = Math.pow(10, -e),
-	        prefix = prefixes[8 + e / 3];
-	    return function(value) {
-	      return f(k * value) + prefix;
-	    };
-	  }
-
-	  return {
-	    format: newFormat,
-	    formatPrefix: formatPrefix
-	  };
-	}
-
-	var locale;
-	var format;
-	var formatPrefix;
-
-	defaultLocale({
-	  decimal: ".",
-	  thousands: ",",
-	  grouping: [3],
-	  currency: ["$", ""],
-	  minus: "-"
-	});
-
-	function defaultLocale(definition) {
-	  locale = formatLocale(definition);
-	  format = locale.format;
-	  formatPrefix = locale.formatPrefix;
-	  return locale;
-	}
-
-	function precisionFixed(step) {
-	  return Math.max(0, -exponent(Math.abs(step)));
-	}
-
-	function precisionPrefix(step, value) {
-	  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
-	}
-
-	function precisionRound(step, max) {
-	  step = Math.abs(step), max = Math.abs(max) - step;
-	  return Math.max(0, exponent(max) - exponent(step)) + 1;
-	}
-
-	function tickFormat(start, stop, count, specifier) {
-	  var step = tickStep(start, stop, count),
-	      precision;
-	  specifier = formatSpecifier(specifier == null ? ",f" : specifier);
-	  switch (specifier.type) {
-	    case "s": {
-	      var value = Math.max(Math.abs(start), Math.abs(stop));
-	      if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) { specifier.precision = precision; }
-	      return formatPrefix(specifier, value);
-	    }
-	    case "":
-	    case "e":
-	    case "g":
-	    case "p":
-	    case "r": {
-	      if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) { specifier.precision = precision - (specifier.type === "e"); }
-	      break;
-	    }
-	    case "f":
-	    case "%": {
-	      if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) { specifier.precision = precision - (specifier.type === "%") * 2; }
-	      break;
-	    }
-	  }
-	  return format(specifier);
-	}
-
-	function linearish(scale) {
-	  var domain = scale.domain;
-
-	  scale.ticks = function(count) {
-	    var d = domain();
-	    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
-	  };
-
-	  scale.tickFormat = function(count, specifier) {
-	    var d = domain();
-	    return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
-	  };
-
-	  scale.nice = function(count) {
-	    if (count == null) { count = 10; }
-
-	    var d = domain(),
-	        i0 = 0,
-	        i1 = d.length - 1,
-	        start = d[i0],
-	        stop = d[i1],
-	        step;
-
-	    if (stop < start) {
-	      step = start, start = stop, stop = step;
-	      step = i0, i0 = i1, i1 = step;
-	    }
-
-	    step = tickIncrement(start, stop, count);
-
-	    if (step > 0) {
-	      start = Math.floor(start / step) * step;
-	      stop = Math.ceil(stop / step) * step;
-	      step = tickIncrement(start, stop, count);
-	    } else if (step < 0) {
-	      start = Math.ceil(start * step) / step;
-	      stop = Math.floor(stop * step) / step;
-	      step = tickIncrement(start, stop, count);
-	    }
-
-	    if (step > 0) {
-	      d[i0] = Math.floor(start / step) * step;
-	      d[i1] = Math.ceil(stop / step) * step;
-	      domain(d);
-	    } else if (step < 0) {
-	      d[i0] = Math.ceil(start * step) / step;
-	      d[i1] = Math.floor(stop * step) / step;
-	      domain(d);
-	    }
-
-	    return scale;
-	  };
-
-	  return scale;
-	}
-
-	function linear$2() {
-	  var scale = continuous(identity$3, identity$3);
-
-	  scale.copy = function() {
-	    return copy$1(scale, linear$2());
-	  };
-
-	  initRange.apply(scale, arguments);
-
-	  return linearish(scale);
-	}
-
-	function quantize() {
-	  var x0 = 0,
-	      x1 = 1,
-	      n = 1,
-	      domain = [0.5],
-	      range = [0, 1],
-	      unknown;
-
-	  function scale(x) {
-	    return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
-	  }
-
-	  function rescale() {
-	    var i = -1;
-	    domain = new Array(n);
-	    while (++i < n) { domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1); }
-	    return scale;
-	  }
-
-	  scale.domain = function(_) {
-	    return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];
-	  };
-
-	  scale.range = function(_) {
-	    return arguments.length ? (n = (range = slice$4.call(_)).length - 1, rescale()) : range.slice();
-	  };
-
-	  scale.invertExtent = function(y) {
-	    var i = range.indexOf(y);
-	    return i < 0 ? [NaN, NaN]
-	        : i < 1 ? [x0, domain[0]]
-	        : i >= n ? [domain[n - 1], x1]
-	        : [domain[i - 1], domain[i]];
-	  };
-
-	  scale.unknown = function(_) {
-	    return arguments.length ? (unknown = _, scale) : scale;
-	  };
-
-	  scale.thresholds = function() {
-	    return domain.slice();
-	  };
-
-	  scale.copy = function() {
-	    return quantize()
-	        .domain([x0, x1])
-	        .range(range)
-	        .unknown(unknown);
-	  };
-
-	  return initRange.apply(linearish(scale), arguments);
-	}
-
-	function behaviorBreathe() {
-	    var duration = 800;
-	    var steps = 4;
-	    var selector = '.selected.shadow, .selected .shadow';
-	    var _selected = select(null);
-	    var _classed = '';
-	    var _params = {};
-	    var _done = false;
-	    var _timer;
-
-
-	    function ratchetyInterpolator(a, b, steps, units) {
-	        a = parseFloat(a);
-	        b = parseFloat(b);
-	        var sample = quantize()
-	            .domain([0, 1])
-	            .range(d3_quantize(d3_interpolateNumber(a, b), steps));
-
-	        return function(t) {
-	            return String(sample(t)) + (units || '');
-	        };
-	    }
-
-
-	    function reset(selection) {
-	        selection
-	            .style('stroke-opacity', null)
-	            .style('stroke-width', null)
-	            .style('fill-opacity', null)
-	            .style('r', null);
-	    }
-
-
-	    function setAnimationParams(transition, fromTo) {
-	        var toFrom = (fromTo === 'from' ? 'to' : 'from');
-
-	        transition
-	            .styleTween('stroke-opacity', function(d) {
-	                return ratchetyInterpolator(
-	                    _params[d.id][toFrom].opacity,
-	                    _params[d.id][fromTo].opacity,
-	                    steps
-	                );
-	            })
-	            .styleTween('stroke-width', function(d) {
-	                return ratchetyInterpolator(
-	                    _params[d.id][toFrom].width,
-	                    _params[d.id][fromTo].width,
-	                    steps,
-	                    'px'
-	                );
-	            })
-	            .styleTween('fill-opacity', function(d) {
-	                return ratchetyInterpolator(
-	                    _params[d.id][toFrom].opacity,
-	                    _params[d.id][fromTo].opacity,
-	                    steps
-	                );
-	            })
-	            .styleTween('r', function(d) {
-	                return ratchetyInterpolator(
-	                    _params[d.id][toFrom].width,
-	                    _params[d.id][fromTo].width,
-	                    steps,
-	                    'px'
-	                );
-	            });
-	    }
-
-
-	    function calcAnimationParams(selection) {
-	        selection
-	            .call(reset)
-	            .each(function(d) {
-	                var s = select(this);
-	                var tag = s.node().tagName;
-	                var p = {'from': {}, 'to': {}};
-	                var opacity;
-	                var width;
-
-	                // determine base opacity and width
-	                if (tag === 'circle') {
-	                    opacity = parseFloat(s.style('fill-opacity') || 0.5);
-	                    width = parseFloat(s.style('r') || 15.5);
-	                } else {
-	                    opacity = parseFloat(s.style('stroke-opacity') || 0.7);
-	                    width = parseFloat(s.style('stroke-width') || 10);
-	                }
-
-	                // calculate from/to interpolation params..
-	                p.tag = tag;
-	                p.from.opacity = opacity * 0.6;
-	                p.to.opacity = opacity * 1.25;
-	                p.from.width = width * 0.7;
-	                p.to.width = width * (tag === 'circle' ? 1.5 : 1);
-	                _params[d.id] = p;
-	            });
-	    }
-
-
-	    function run(surface, fromTo) {
-	        var toFrom = (fromTo === 'from' ? 'to' : 'from');
-	        var currSelected = surface.selectAll(selector);
-	        var currClassed = surface.attr('class');
-
-	        if (_done || currSelected.empty()) {
-	            _selected.call(reset);
-	            _selected = select(null);
-	            return;
-	        }
-
-	        if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
-	            _selected.call(reset);
-	            _classed = currClassed;
-	            _selected = currSelected.call(calcAnimationParams);
-	        }
-
-	        var didCallNextRun = false;
-
-	        _selected
-	            .transition()
-	            .duration(duration)
-	            .call(setAnimationParams, fromTo)
-	            .on('end', function() {
-	                // `end` event is called for each selected element, but we want
-	                // it to run only once
-	                if (!didCallNextRun) {
-	                    surface.call(run, toFrom);
-	                    didCallNextRun = true;
-	                }
-
-	                // if entity was deselected, remove breathe styling
-	                if (!select(this).classed('selected')) {
-	                    reset(select(this));
-	                }
-	            });
-	    }
-
-	    function behavior(surface) {
-	        _done = false;
-	        _timer = timer(function() {
-	            // wait for elements to actually become selected
-	            if (surface.selectAll(selector).empty()) {
-	                return false;
-	            }
-
-	            surface.call(run, 'from');
-	            _timer.stop();
-	            return true;
-	        }, 20);
-	    }
-
-	    behavior.restartIfNeeded = function(surface) {
-	        if (_selected.empty()) {
-	            surface.call(run, 'from');
-	            if (_timer) {
-	                _timer.stop();
-	            }
-	        }
-	    };
-
-	    behavior.off = function() {
-	        _done = true;
-	        if (_timer) {
-	            _timer.stop();
-	        }
-	        _selected
-	            .interrupt()
-	            .call(reset);
-	    };
-
-
-	    return behavior;
-	}
-
-	/* Creates a keybinding behavior for an operation */
-	function behaviorOperation(context) {
-	    var _operation;
-
-	    function keypress() {
-	        // prevent operations during low zoom selection
-	        if (!context.map().withinEditableZoom()) { return; }
-
-	        event.preventDefault();
-	        var disabled = _operation.disabled();
-
-	        if (disabled) {
-	            context.ui().flash
-	                .duration(4000)
-	                .iconName('#iD-operation-' + _operation.id)
-	                .iconClass('operation disabled')
-	                .text(_operation.tooltip)();
-
-	        } else {
-	            context.ui().flash
-	                .duration(2000)
-	                .iconName('#iD-operation-' + _operation.id)
-	                .iconClass('operation')
-	                .text(_operation.annotation() || _operation.title)();
-
-	            if (_operation.point) { _operation.point(null); }
-	            _operation();
-	        }
-	    }
-
-
-	    function behavior() {
-	        if (_operation && _operation.available()) {
-	            context.keybinding()
-	                .on(_operation.keys, keypress);
-	        }
-
-	        return behavior;
-	    }
-
-
-	    behavior.off = function() {
-	        context.keybinding()
-	            .off(_operation.keys);
-	    };
-
-
-	    behavior.which = function (_) {
-	        if (!arguments.length) { return _operation; }
-	        _operation = _;
-	        return behavior;
-	    };
-
-
-	    return behavior;
-	}
-
-	function operationCircularize(context, selectedIDs) {
-	    var _extent;
-	    var _actions = selectedIDs.map(getAction).filter(Boolean);
-	    var _amount = _actions.length === 1 ? 'single' : 'multiple';
-	    var _coords = utilGetAllNodes(selectedIDs, context.graph())
-	        .map(function(n) { return n.loc; });
-
-	    function getAction(entityID) {
-
-	        var entity = context.entity(entityID);
-
-	        if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) { return null; }
-
-	        if (!_extent) {
-	            _extent =  entity.extent(context.graph());
-	        } else {
-	            _extent = _extent.extend(entity.extent(context.graph()));
-	        }
-
-	        return actionCircularize(entityID, context.projection);
-	    }
-
-	    var operation = function() {
-	        if (!_actions.length) { return; }
-
-	        var combinedAction = function(graph, t) {
-	            _actions.forEach(function(action) {
-	                if (!action.disabled(graph)) {
-	                    graph = action(graph, t);
-	                }
-	            });
-	            return graph;
-	        };
-	        combinedAction.transitionable = true;
-
-	        context.perform(combinedAction, operation.annotation());
-
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
-	    };
-
-
-	    operation.available = function() {
-	        return _actions.length && selectedIDs.length === _actions.length;
-	    };
-
-
-	    // don't cache this because the visible extent could change
-	    operation.disabled = function() {
-	        if (!_actions.length) { return ''; }
-
-	        var actionDisableds = _actions.map(function(action) {
-	            return action.disabled(context.graph());
-	        }).filter(Boolean);
-
-	        if (actionDisableds.length === _actions.length) {
-	            // none of the features can be circularized
-
-	            if (new Set(actionDisableds).size > 1) {
-	                return 'multiple_blockers';
-	            }
-	            return actionDisableds[0];
-	        } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
-
-	        return false;
-
-
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-	    };
-
-
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.circularize.' + disable + '.' + _amount) :
-	            _t('operations.circularize.description.' + _amount);
-	    };
-
-
-	    operation.annotation = function() {
-	        return _t('operations.circularize.annotation.' + _amount);
-	    };
-
-
-	    operation.id = 'circularize';
-	    operation.keys = [_t('operations.circularize.key')];
-	    operation.title = _t('operations.circularize.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
-
-	    return operation;
-	}
-
-	// Translate a MacOS key command into the appropriate Windows/Linux equivalent.
-	// For example, ⌘Z -> Ctrl+Z
-	var uiCmd = function (code) {
-	    var detected = utilDetect();
-
-	    if (detected.os === 'mac') {
-	        return code;
-	    }
-
-	    if (detected.os === 'win') {
-	        if (code === '⌘⇧Z') { return 'Ctrl+Y'; }
-	    }
-
-	    var result = '',
-	        replacements = {
-	            '⌘': 'Ctrl',
-	            '⇧': 'Shift',
-	            '⌥': 'Alt',
-	            '⌫': 'Backspace',
-	            '⌦': 'Delete'
-	        };
-
-	    for (var i = 0; i < code.length; i++) {
-	        if (code[i] in replacements) {
-	            result += replacements[code[i]] + (i < code.length - 1 ? '+' : '');
-	        } else {
-	            result += code[i];
-	        }
-	    }
-
-	    return result;
-	};
-
-
-	// return a display-focused string for a given keyboard code
-	uiCmd.display = function(code) {
-	    if (code.length !== 1) { return code; }
-
-	    var detected = utilDetect();
-	    var mac = (detected.os === 'mac');
-	    var replacements = {
-	        '⌘': mac ? '⌘ ' + _t('shortcuts.key.cmd')    : _t('shortcuts.key.ctrl'),
-	        '⇧': mac ? '⇧ ' + _t('shortcuts.key.shift')  : _t('shortcuts.key.shift'),
-	        '⌥': mac ? '⌥ ' + _t('shortcuts.key.option') : _t('shortcuts.key.alt'),
-	        '⌃': mac ? '⌃ ' + _t('shortcuts.key.ctrl')   : _t('shortcuts.key.ctrl'),
-	        '⌫': mac ? '⌫ ' + _t('shortcuts.key.delete') : _t('shortcuts.key.backspace'),
-	        '⌦': mac ? '⌦ ' + _t('shortcuts.key.del')    : _t('shortcuts.key.del'),
-	        '↖': mac ? '↖ ' + _t('shortcuts.key.pgup')   : _t('shortcuts.key.pgup'),
-	        '↘': mac ? '↘ ' + _t('shortcuts.key.pgdn')   : _t('shortcuts.key.pgdn'),
-	        '⇞': mac ? '⇞ ' + _t('shortcuts.key.home')   : _t('shortcuts.key.home'),
-	        '⇟': mac ? '⇟ ' + _t('shortcuts.key.end')    : _t('shortcuts.key.end'),
-	        '↵': mac ? '⏎ ' + _t('shortcuts.key.return') : _t('shortcuts.key.enter'),
-	        '⎋': mac ? '⎋ ' + _t('shortcuts.key.esc')    : _t('shortcuts.key.esc'),
-	        '☰': mac ? '☰ ' + _t('shortcuts.key.menu')  : _t('shortcuts.key.menu'),
-	    };
-
-	    return replacements[code] || code;
-	};
-
-	function operationDelete(context, selectedIDs) {
-	    var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-	    var action = actionDeleteMultiple(selectedIDs);
-	    var nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var coords = nodes.map(function(n) { return n.loc; });
-	    var extent = utilTotalExtent(selectedIDs, context.graph());
-
-
-	    var operation = function() {
-	        var nextSelectedID;
-	        var nextSelectedLoc;
-
-	        if (selectedIDs.length === 1) {
-	            var id = selectedIDs[0];
-	            var entity = context.entity(id);
-	            var geometry = entity.geometry(context.graph());
-	            var parents = context.graph().parentWays(entity);
-	            var parent = parents[0];
-
-	            // Select the next closest node in the way.
-	            if (geometry === 'vertex') {
-	                var nodes = parent.nodes;
-	                var i = nodes.indexOf(id);
-
-	                if (i === 0) {
-	                    i++;
-	                } else if (i === nodes.length - 1) {
-	                    i--;
-	                } else {
-	                    var a = geoSphericalDistance(entity.loc, context.entity(nodes[i - 1]).loc);
-	                    var b = geoSphericalDistance(entity.loc, context.entity(nodes[i + 1]).loc);
-	                    i = a < b ? i - 1 : i + 1;
-	                }
-
-	                nextSelectedID = nodes[i];
-	                nextSelectedLoc = context.entity(nextSelectedID).loc;
-	            }
-	        }
-
-	        context.perform(action, operation.annotation());
-	        context.validator().validate();
-
-	        if (nextSelectedID && nextSelectedLoc) {
-	            if (context.hasEntity(nextSelectedID)) {
-	                context.enter(modeSelect(context, [nextSelectedID]).follow(true));
-	            } else {
-	                context.map().centerEase(nextSelectedLoc);
-	                context.enter(modeBrowse(context));
-	            }
-	        } else {
-	            context.enter(modeBrowse(context));
-	        }
-
-	    };
-
-
-	    operation.available = function() {
-	        return true;
-	    };
-
-
-	    operation.disabled = function() {
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        } else if (selectedIDs.some(protectedMember)) {
-	            return 'part_of_relation';
-	        } else if (selectedIDs.some(incompleteRelation)) {
-	            return 'incomplete_relation';
-	        } else if (selectedIDs.some(hasWikidataTag)) {
-	            return 'has_wikidata_tag';
-	        }
-
-	        return false;
-
-
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-
-	        function hasWikidataTag(id) {
-	            var entity = context.entity(id);
-	            return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-	        }
-
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
-
-	        function protectedMember(id) {
-	            var entity = context.entity(id);
-	            if (entity.type !== 'way') { return false; }
-
-	            var parents = context.graph().parentRelations(entity);
-	            for (var i = 0; i < parents.length; i++) {
-	                var parent = parents[i];
-	                var type = parent.tags.type;
-	                var role = parent.memberById(id).role || 'outer';
-	                if (type === 'route' || type === 'boundary' || (type === 'multipolygon' && role === 'outer')) {
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-	    };
-
-
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.delete.' + disable + '.' + multi) :
-	            _t('operations.delete.description' + '.' + multi);
-	    };
-
-
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) :
-	            _t('operations.delete.annotation.multiple', { n: selectedIDs.length });
-	    };
-
-
-	    operation.id = 'delete';
-	    operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-	    operation.title = _t('operations.delete.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
-
-	    return operation;
-	}
-
-	function operationOrthogonalize(context, selectedIDs) {
-	    var _extent;
-	    var _type;
-	    var _actions = selectedIDs.map(chooseAction).filter(Boolean);
-	    var _amount = _actions.length === 1 ? 'single' : 'multiple';
-	    var _coords = utilGetAllNodes(selectedIDs, context.graph())
-	        .map(function(n) { return n.loc; });
-
-
-	    function chooseAction(entityID) {
-
-	        var entity = context.entity(entityID);
-	        var geometry = entity.geometry(context.graph());
-
-	        if (!_extent) {
-	            _extent =  entity.extent(context.graph());
-	        } else {
-	            _extent = _extent.extend(entity.extent(context.graph()));
-	        }
-
-	        // square a line/area
-	        if (entity.type === 'way' && new Set(entity.nodes).size > 2 ) {
-	            if (_type && _type !== 'feature') { return null; }
-	            _type = 'feature';
-	            return actionOrthogonalize(entityID, context.projection);
-
-	        // square a single vertex
-	        } else if (geometry === 'vertex') {
-	            if (_type && _type !== 'corner') { return null; }
-	            _type = 'corner';
-	            var graph = context.graph();
-	            var parents = graph.parentWays(entity);
-	            if (parents.length === 1) {
-	                var way = parents[0];
-	                if (way.nodes.indexOf(entityID) !== -1) {
-	                    return actionOrthogonalize(way.id, context.projection, entityID);
-	                }
-	            }
-	        }
-
-	        return null;
-	    }
-
-
-	    var operation = function() {
-	        if (!_actions.length) { return; }
-
-	        var combinedAction = function(graph, t) {
-	            _actions.forEach(function(action) {
-	                if (!action.disabled(graph)) {
-	                    graph = action(graph, t);
-	                }
-	            });
-	            return graph;
-	        };
-	        combinedAction.transitionable = true;
-
-	        context.perform(combinedAction, operation.annotation());
-
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
-	    };
-
-
-	    operation.available = function() {
-	        return _actions.length && selectedIDs.length === _actions.length;
-	    };
-
-
-	    // don't cache this because the visible extent could change
-	    operation.disabled = function() {
-	        if (!_actions.length) { return ''; }
-
-	        var actionDisableds = _actions.map(function(action) {
-	            return action.disabled(context.graph());
-	        }).filter(Boolean);
-
-	        if (actionDisableds.length === _actions.length) {
-	            // none of the features can be squared
-
-	            if (new Set(actionDisableds).size > 1) {
-	                return 'multiple_blockers';
-	            }
-	            return actionDisableds[0];
-	        } else if (_extent &&
-	                   _extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
-
-	        return false;
-
-
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-	    };
-
-
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.orthogonalize.' + disable + '.' + _amount) :
-	            _t('operations.orthogonalize.description.' + _type + '.' + _amount);
-	    };
-
-
-	    operation.annotation = function() {
-	        return _t('operations.orthogonalize.annotation.' + _type + '.' + _amount);
-	    };
-
-
-	    operation.id = 'orthogonalize';
-	    operation.keys = [_t('operations.orthogonalize.key')];
-	    operation.title = _t('operations.orthogonalize.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
-
-	    return operation;
-	}
-
-	function operationReflectShort(context, selectedIDs) {
-	    return operationReflect(context, selectedIDs, 'short');
-	}
-
-
-	function operationReflectLong(context, selectedIDs) {
-	    return operationReflect(context, selectedIDs, 'long');
-	}
-
-
-	function operationReflect(context, selectedIDs, axis) {
-	    axis = axis || 'long';
-	    var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-	    var nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var coords = nodes.map(function(n) { return n.loc; });
-	    var extent = utilTotalExtent(selectedIDs, context.graph());
-
-
-	    var operation = function() {
-	        var action = actionReflect(selectedIDs, context.projection)
-	            .useLongAxis(Boolean(axis === 'long'));
-
-	        context.perform(action, operation.annotation());
-
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
-	    };
-
-
-	    operation.available = function() {
-	        return nodes.length >= 3;
-	    };
-
-
-	    // don't cache this because the visible extent could change
-	    operation.disabled = function() {
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        } else if (selectedIDs.some(incompleteRelation)) {
-	            return 'incomplete_relation';
-	        }
-
-	        return false;
-
-
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
-	    };
-
-
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.reflect.' + disable + '.' + multi) :
-	            _t('operations.reflect.description.' + axis + '.' + multi);
-	    };
-
-
-	    operation.annotation = function() {
-	        return _t('operations.reflect.annotation.' + axis + '.' + multi);
-	    };
-
-
-	    operation.id = 'reflect-' + axis;
-	    operation.keys = [_t('operations.reflect.key.' + axis)];
-	    operation.title = _t('operations.reflect.title.' + axis);
-	    operation.behavior = behaviorOperation(context).which(operation);
-
-	    return operation;
+	function d3_timeout (callback, delay, time) {
+	  var t = new Timer();
+	  delay = delay == null ? 0 : +delay;
+	  t.restart(function (elapsed) {
+	    t.stop();
+	    callback(elapsed + delay);
+	  }, delay, time);
+	  return t;
 	}
 
-	function operationMove(context, selectedIDs) {
-	    var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-	    var nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var coords = nodes.map(function(n) { return n.loc; });
-	    var extent = utilTotalExtent(selectedIDs, context.graph());
-
-
-	    var operation = function() {
-	        context.enter(modeMove(context, selectedIDs));
-	    };
-
-
-	    operation.available = function() {
-	        return selectedIDs.length > 1 ||
-	            context.entity(selectedIDs[0]).type !== 'node';
-	    };
-
-
-	    operation.disabled = function() {
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        } else if (selectedIDs.some(incompleteRelation)) {
-	            return 'incomplete_relation';
-	        }
-
-	        return false;
-
-
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
-	    };
-
-
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.move.' + disable + '.' + multi) :
-	            _t('operations.move.description.' + multi);
-	    };
-
-
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) :
-	            _t('operations.move.annotation.multiple');
-	    };
-
-
-	    operation.id = 'move';
-	    operation.keys = [_t('operations.move.key')];
-	    operation.title = _t('operations.move.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
-
-	    operation.mouseOnly = true;
-
-	    return operation;
+	var emptyOn = dispatch("start", "end", "cancel", "interrupt");
+	var emptyTween = [];
+	var CREATED = 0;
+	var SCHEDULED = 1;
+	var STARTING = 2;
+	var STARTED = 3;
+	var RUNNING = 4;
+	var ENDING = 5;
+	var ENDED = 6;
+	function schedule (node, name, id, index, group, timing) {
+	  var schedules = node.__transition;
+	  if (!schedules) node.__transition = {};else if (id in schedules) return;
+	  create(node, id, {
+	    name: name,
+	    index: index,
+	    // For context during callback.
+	    group: group,
+	    // For context during callback.
+	    on: emptyOn,
+	    tween: emptyTween,
+	    time: timing.time,
+	    delay: timing.delay,
+	    duration: timing.duration,
+	    ease: timing.ease,
+	    timer: null,
+	    state: CREATED
+	  });
 	}
-
-	function modeRotate(context, entityIDs) {
-	    var mode = {
-	        id: 'rotate',
-	        button: 'browse'
-	    };
-
-	    var keybinding = utilKeybinding('rotate');
-	    var behaviors = [
-	        behaviorEdit(context),
-	        operationCircularize(context, entityIDs).behavior,
-	        operationDelete(context, entityIDs).behavior,
-	        operationMove(context, entityIDs).behavior,
-	        operationOrthogonalize(context, entityIDs).behavior,
-	        operationReflectLong(context, entityIDs).behavior,
-	        operationReflectShort(context, entityIDs).behavior
-	    ];
-	    var annotation = entityIDs.length === 1 ?
-	        _t('operations.rotate.annotation.' + context.graph().geometry(entityIDs[0])) :
-	        _t('operations.rotate.annotation.multiple');
-
-	    var _prevGraph;
-	    var _prevAngle;
-	    var _prevTransform;
-	    var _pivot;
-
-
-	    function doRotate() {
-	        var fn;
-	        if (context.graph() !== _prevGraph) {
-	            fn = context.perform;
-	        } else {
-	            fn = context.replace;
-	        }
-
-	        // projection changed, recalculate _pivot
-	        var projection = context.projection;
-	        var currTransform = projection.transform();
-	        if (!_prevTransform ||
-	            currTransform.k !== _prevTransform.k ||
-	            currTransform.x !== _prevTransform.x ||
-	            currTransform.y !== _prevTransform.y) {
-
-	            var nodes = utilGetAllNodes(entityIDs, context.graph());
-	            var points = nodes.map(function(n) { return projection(n.loc); });
-	            _pivot = getPivot(points);
-	            _prevAngle = undefined;
-	        }
-
-
-	        var currMouse = context.map().mouse();
-	        var currAngle = Math.atan2(currMouse[1] - _pivot[1], currMouse[0] - _pivot[0]);
-
-	        if (typeof _prevAngle === 'undefined') { _prevAngle = currAngle; }
-	        var delta = currAngle - _prevAngle;
-
-	        fn(actionRotate(entityIDs, _pivot, delta, projection));
-
-	        _prevTransform = currTransform;
-	        _prevAngle = currAngle;
-	        _prevGraph = context.graph();
-	    }
-
-	    function getPivot(points) {
-	        var _pivot;
-	        if (points.length === 1) {
-	            _pivot = points[0];
-	        } else if (points.length === 2) {
-	            _pivot = geoVecInterp(points[0], points[1], 0.5);
-	        } else {
-	            var polygonHull = d3_polygonHull(points);
-	            if (polygonHull.length === 2) {
-	                _pivot = geoVecInterp(points[0], points[1], 0.5);
-	            } else {
-	                _pivot = d3_polygonCentroid(d3_polygonHull(points));
-	            }
-	        }
-	        return _pivot;
-	    }
-
-
-	    function finish() {
-	        event.stopPropagation();
-	        context.replace(actionNoop(), annotation);
-	        context.enter(modeSelect(context, entityIDs));
-	    }
-
-
-	    function cancel() {
-	        context.pop();
-	        context.enter(modeSelect(context, entityIDs));
-	    }
-
-
-	    function undone() {
-	        context.enter(modeBrowse(context));
-	    }
-
-
-	    mode.enter = function() {
-	        context.features().forceVisible(entityIDs);
-
-	        behaviors.forEach(context.install);
-
-	        context.surface()
-	            .on('mousemove.rotate', doRotate)
-	            .on('click.rotate', finish);
-
-	        context.history()
-	            .on('undone.rotate', undone);
-
-	        keybinding
-	            .on('⎋', cancel)
-	            .on('↩', finish);
-
-	        select(document)
-	            .call(keybinding);
-	    };
-
-
-	    mode.exit = function() {
-	        behaviors.forEach(context.uninstall);
-
-	        context.surface()
-	            .on('mousemove.rotate', null)
-	            .on('click.rotate', null);
-
-	        context.history()
-	            .on('undone.rotate', null);
-
-	        select(document)
-	            .call(keybinding.unbind);
-
-	        context.features().forceVisible([]);
-	    };
-
-
-	    mode.selectedIDs = function() {
-	        if (!arguments.length) { return entityIDs; }
-	        // no assign
-	        return mode;
-	    };
-
-
-	    return mode;
+	function init(node, id) {
+	  var schedule = get$4(node, id);
+	  if (schedule.state > CREATED) throw new Error("too late; already scheduled");
+	  return schedule;
+	}
+	function set$4(node, id) {
+	  var schedule = get$4(node, id);
+	  if (schedule.state > STARTED) throw new Error("too late; already running");
+	  return schedule;
+	}
+	function get$4(node, id) {
+	  var schedule = node.__transition;
+	  if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
+	  return schedule;
 	}
 
-	function operationRotate(context, selectedIDs) {
-	    var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-	    var nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var coords = nodes.map(function(n) { return n.loc; });
-	    var extent = utilTotalExtent(selectedIDs, context.graph());
-
-
-	    var operation = function() {
-	        context.enter(modeRotate(context, selectedIDs));
-	    };
-
+	function create(node, id, self) {
+	  var schedules = node.__transition,
+	      tween; // Initialize the self timer when the transition is created.
+	  // Note the actual delay is not known until the first callback!
 
-	    operation.available = function() {
-	        return nodes.length >= 2;
-	    };
+	  schedules[id] = self;
+	  self.timer = timer(schedule, 0, self.time);
 
+	  function schedule(elapsed) {
+	    self.state = SCHEDULED;
+	    self.timer.restart(start, self.delay, self.time); // If the elapsed delay is less than our first sleep, start immediately.
 
-	    operation.disabled = function() {
+	    if (self.delay <= elapsed) start(elapsed - self.delay);
+	  }
 
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        } else if (selectedIDs.some(incompleteRelation)) {
-	            return 'incomplete_relation';
-	        }
+	  function start(elapsed) {
+	    var i, j, n, o; // If the state is not SCHEDULED, then we previously errored on start.
 
-	        return false;
+	    if (self.state !== SCHEDULED) return stop();
 
+	    for (i in schedules) {
+	      o = schedules[i];
+	      if (o.name !== self.name) continue; // While this element already has a starting transition during this frame,
+	      // defer starting an interrupting transition until that transition has a
+	      // chance to tick (and possibly end); see d3/d3-transition#54!
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
+	      if (o.state === STARTED) return d3_timeout(start); // Interrupt the active transition, if any.
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
+	      if (o.state === RUNNING) {
+	        o.state = ENDED;
+	        o.timer.stop();
+	        o.on.call("interrupt", node, node.__data__, o.index, o.group);
+	        delete schedules[i];
+	      } // Cancel any pre-empted transitions.
+	      else if (+i < id) {
+	          o.state = ENDED;
+	          o.timer.stop();
+	          o.on.call("cancel", node, node.__data__, o.index, o.group);
+	          delete schedules[i];
 	        }
-	    };
-
-
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.rotate.' + disable + '.' + multi) :
-	            _t('operations.rotate.description.' + multi);
-	    };
-
-
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) :
-	            _t('operations.rotate.annotation.multiple');
-	    };
-
-
-	    operation.id = 'rotate';
-	    operation.keys = [_t('operations.rotate.key')];
-	    operation.title = _t('operations.rotate.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	    } // Defer the first tick to end of the current frame; see d3/d3#1576.
+	    // Note the transition may be canceled after start and before the first tick!
+	    // Note this must be scheduled before the start event; see d3/d3-transition#16!
+	    // Assuming this is successful, subsequent callbacks go straight to tick.
 
-	    operation.mouseOnly = true;
 
-	    return operation;
-	}
+	    d3_timeout(function () {
+	      if (self.state === STARTED) {
+	        self.state = RUNNING;
+	        self.timer.restart(tick, self.delay, self.time);
+	        tick(elapsed);
+	      }
+	    }); // Dispatch the start event.
+	    // Note this must be done before the tween are initialized.
 
-	function modeMove(context, entityIDs, baseGraph) {
-	    var mode = {
-	        id: 'move',
-	        button: 'browse'
-	    };
+	    self.state = STARTING;
+	    self.on.call("start", node, node.__data__, self.index, self.group);
+	    if (self.state !== STARTING) return; // interrupted
 
-	    var keybinding = utilKeybinding('move');
-	    var behaviors = [
-	        behaviorEdit(context),
-	        operationCircularize(context, entityIDs).behavior,
-	        operationDelete(context, entityIDs).behavior,
-	        operationOrthogonalize(context, entityIDs).behavior,
-	        operationReflectLong(context, entityIDs).behavior,
-	        operationReflectShort(context, entityIDs).behavior,
-	        operationRotate(context, entityIDs).behavior
-	    ];
-	    var annotation = entityIDs.length === 1 ?
-	        _t('operations.move.annotation.' + context.graph().geometry(entityIDs[0])) :
-	        _t('operations.move.annotation.multiple');
-
-	    var _prevGraph;
-	    var _cache;
-	    var _origin;
-	    var _nudgeInterval;
-
-
-	    function doMove(nudge) {
-	        nudge = nudge || [0, 0];
-
-	        var fn;
-	        if (_prevGraph !== context.graph()) {
-	            _cache = {};
-	            _origin = context.map().mouseCoordinates();
-	            fn = context.perform;
-	        } else {
-	            fn = context.overwrite;
-	        }
+	    self.state = STARTED; // Initialize the tween, deleting null tween.
 
-	        var currMouse = context.map().mouse();
-	        var origMouse = context.projection(_origin);
-	        var delta = geoVecSubtract(geoVecSubtract(currMouse, origMouse), nudge);
+	    tween = new Array(n = self.tween.length);
 
-	        fn(actionMove(entityIDs, delta, context.projection, _cache));
-	        _prevGraph = context.graph();
+	    for (i = 0, j = -1; i < n; ++i) {
+	      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
+	        tween[++j] = o;
+	      }
 	    }
 
+	    tween.length = j + 1;
+	  }
 
-	    function startNudge(nudge) {
-	        if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-	        _nudgeInterval = window.setInterval(function() {
-	            context.map().pan(nudge);
-	            doMove(nudge);
-	        }, 50);
-	    }
-
+	  function tick(elapsed) {
+	    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
+	        i = -1,
+	        n = tween.length;
 
-	    function stopNudge() {
-	        if (_nudgeInterval) {
-	            window.clearInterval(_nudgeInterval);
-	            _nudgeInterval = null;
-	        }
-	    }
+	    while (++i < n) {
+	      tween[i].call(node, t);
+	    } // Dispatch the end event.
 
 
-	    function move() {
-	        doMove();
-	        var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
-	        if (nudge) {
-	            startNudge(nudge);
-	        } else {
-	            stopNudge();
-	        }
+	    if (self.state === ENDING) {
+	      self.on.call("end", node, node.__data__, self.index, self.group);
+	      stop();
 	    }
+	  }
 
+	  function stop() {
+	    self.state = ENDED;
+	    self.timer.stop();
+	    delete schedules[id];
 
-	    function finish() {
-	        event.stopPropagation();
-	        context.replace(actionNoop(), annotation);
-	        context.enter(modeSelect(context, entityIDs));
-	        stopNudge();
-	    }
+	    for (var i in schedules) {
+	      return;
+	    } // eslint-disable-line no-unused-vars
 
 
-	    function cancel() {
-	        if (baseGraph) {
-	            while (context.graph() !== baseGraph) { context.pop(); }
-	            context.enter(modeBrowse(context));
-	        } else {
-	            context.pop();
-	            context.enter(modeSelect(context, entityIDs));
-	        }
-	        stopNudge();
-	    }
+	    delete node.__transition;
+	  }
+	}
 
+	function interrupt (node, name) {
+	  var schedules = node.__transition,
+	      schedule,
+	      active,
+	      empty = true,
+	      i;
+	  if (!schedules) return;
+	  name = name == null ? null : name + "";
 
-	    function undone() {
-	        context.enter(modeBrowse(context));
+	  for (i in schedules) {
+	    if ((schedule = schedules[i]).name !== name) {
+	      empty = false;
+	      continue;
 	    }
 
+	    active = schedule.state > STARTING && schedule.state < ENDING;
+	    schedule.state = ENDED;
+	    schedule.timer.stop();
+	    schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
+	    delete schedules[i];
+	  }
 
-	    mode.enter = function() {
-	        _origin = context.map().mouseCoordinates();
-	        _prevGraph = null;
-	        _cache = {};
-
-	        context.features().forceVisible(entityIDs);
-
-	        behaviors.forEach(context.install);
-
-	        context.surface()
-	            .on('mousemove.move', move)
-	            .on('click.move', finish);
-
-	        context.history()
-	            .on('undone.move', undone);
-
-	        keybinding
-	            .on('⎋', cancel)
-	            .on('↩', finish);
-
-	        select(document)
-	            .call(keybinding);
-	    };
-
-
-	    mode.exit = function() {
-	        stopNudge();
-
-	        behaviors.forEach(function(behavior) {
-	            context.uninstall(behavior);
-	        });
-
-	        context.surface()
-	            .on('mousemove.move', null)
-	            .on('click.move', null);
-
-	        context.history()
-	            .on('undone.move', null);
-
-	        select(document)
-	            .call(keybinding.unbind);
-
-	        context.features().forceVisible([]);
-	    };
-
-
-	    mode.selectedIDs = function() {
-	        if (!arguments.length) { return entityIDs; }
-	        // no assign
-	        return mode;
-	    };
-
-
-	    return mode;
+	  if (empty) delete node.__transition;
 	}
 
-	// see also `operationPaste`
-	function behaviorPaste(context) {
-
-	    function doPaste() {
-	        // prevent paste during low zoom selection
-	        if (!context.map().withinEditableZoom()) { return; }
-
-	        event.preventDefault();
-
-	        var baseGraph = context.graph();
-	        var mouse = context.map().mouse();
-	        var projection = context.projection;
-	        var viewport = geoExtent(projection.clipExtent()).polygon();
-
-	        if (!geoPointInPolygon(mouse, viewport)) { return; }
-
-	        var oldIDs = context.copyIDs();
-	        if (!oldIDs.length) { return; }
-
-	        var extent = geoExtent();
-	        var oldGraph = context.copyGraph();
-	        var newIDs = [];
-
-	        var action = actionCopyEntities(oldIDs, oldGraph);
-	        context.perform(action);
-
-	        var copies = action.copies();
-	        var originals = new Set();
-	        Object.values(copies).forEach(function(entity) { originals.add(entity.id); });
-
-	        for (var id in copies) {
-	            var oldEntity = oldGraph.entity(id);
-	            var newEntity = copies[id];
+	function selection_interrupt (name) {
+	  return this.each(function () {
+	    interrupt(this, name);
+	  });
+	}
 
-	            extent._extend(oldEntity.extent(oldGraph));
+	function tweenRemove(id, name) {
+	  var tween0, tween1;
+	  return function () {
+	    var schedule = set$4(this, id),
+	        tween = schedule.tween; // If this node shared tween with the previous node,
+	    // just assign the updated shared tween and we’re done!
+	    // Otherwise, copy-on-write.
 
-	            // Exclude child nodes from newIDs if their parent way was also copied.
-	            var parents = context.graph().parentWays(newEntity);
-	            var parentCopied = parents.some(function(parent) {
-	                return originals.has(parent.id);
-	            });
+	    if (tween !== tween0) {
+	      tween1 = tween0 = tween;
 
-	            if (!parentCopied) {
-	                newIDs.push(newEntity.id);
-	            }
+	      for (var i = 0, n = tween1.length; i < n; ++i) {
+	        if (tween1[i].name === name) {
+	          tween1 = tween1.slice();
+	          tween1.splice(i, 1);
+	          break;
 	        }
-
-	        // Put pasted objects where mouse pointer is..
-	        var copyPoint = (context.copyLonLat() && projection(context.copyLonLat())) || projection(extent.center());
-	        var delta = geoVecSubtract(mouse, copyPoint);
-
-	        context.perform(actionMove(newIDs, delta, projection));
-	        context.enter(modeMove(context, newIDs, baseGraph));
-	    }
-
-
-	    function behavior() {
-	        context.keybinding().on(uiCmd('⌘V'), doPaste);
-	        return behavior;
+	      }
 	    }
 
-
-	    behavior.off = function() {
-	        context.keybinding().off(uiCmd('⌘V'));
-	    };
-
-
-	    return behavior;
+	    schedule.tween = tween1;
+	  };
 	}
 
-	/*
-	    `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
-
-	    * The `origin` function is expected to return an [x, y] tuple rather than an
-	      {x, y} object.
-	    * The events are `start`, `move`, and `end`.
-	      (https://github.com/mbostock/d3/issues/563)
-	    * The `start` event is not dispatched until the first cursor movement occurs.
-	      (https://github.com/mbostock/d3/pull/368)
-	    * The `move` event has a `point` and `delta` [x, y] tuple properties rather
-	      than `x`, `y`, `dx`, and `dy` properties.
-	    * The `end` event is not dispatched if no movement occurs.
-	    * An `off` function is available that unbinds the drag's internal event handlers.
-	 */
-
-	function behaviorDrag() {
-	    var dispatch$1 = dispatch('start', 'move', 'end');
-
-	    // see also behaviorSelect
-	    var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
-	    var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
-
-	    var _origin = null;
-	    var _selector = '';
-	    var _event;
-	    var _target;
-	    var _surface;
-	    var _pointerId;
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-	    var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
-	    var d3_event_userSelectSuppress = function() {
-	            var selection$1 = selection();
-	            var select = selection$1.style(d3_event_userSelectProperty);
-	            selection$1.style(d3_event_userSelectProperty, 'none');
-	            return function() {
-	                selection$1.style(d3_event_userSelectProperty, select);
-	            };
-	        };
-
-
-	    function eventOf(thiz, argumentz) {
-	        return function(e1) {
-	            e1.target = behavior;
-	            customEvent(e1, dispatch$1.apply, dispatch$1, [e1.type, thiz, argumentz]);
-	        };
-	    }
-
-
-	    function pointerdown() {
-
-	        if (_pointerId) { return; }
-
-	        _pointerId = event.pointerId || 'mouse';
-
-	        _target = this;
-	        _event = eventOf(_target, arguments);
-
-	        // only force reflow once per drag
-	        var pointerLocGetter = utilFastMouse(_surface || _target.parentNode);
-
-	        var offset;
-	        var startOrigin = pointerLocGetter(event);
-	        var started = false;
-	        var selectEnable = d3_event_userSelectSuppress();
-
-	        select(window)
-	            .on(_pointerPrefix + 'move.drag', pointermove)
-	            .on(_pointerPrefix + 'up.drag pointercancel.drag', pointerup, true);
-
-	        if (_origin) {
-	            offset = _origin.apply(_target, arguments);
-	            offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
-	        } else {
-	            offset = [0, 0];
-	        }
-
-	        event.stopPropagation();
-
-
-	        function pointermove() {
-	            if (_pointerId !== (event.pointerId || 'mouse')) { return; }
-
-	            var p = pointerLocGetter(event);
-
-	            if (!started) {
-	                var dist = geoVecLength(startOrigin,  p);
-	                var tolerance = event.pointerType === 'pen' ? _penTolerancePx : _tolerancePx;
-	                // don't start until the drag has actually moved somewhat
-	                if (dist < tolerance) { return; }
-
-	                started = true;
-	                _event({ type: 'start' });
-
-	            // Don't send a `move` event in the same cycle as `start` since dragging
-	            // a midpoint will convert the target to a node.
-	            } else {
+	function tweenFunction(id, name, value) {
+	  var tween0, tween1;
+	  if (typeof value !== "function") throw new Error();
+	  return function () {
+	    var schedule = set$4(this, id),
+	        tween = schedule.tween; // If this node shared tween with the previous node,
+	    // just assign the updated shared tween and we’re done!
+	    // Otherwise, copy-on-write.
 
-	                startOrigin = p;
-	                event.stopPropagation();
-	                event.preventDefault();
+	    if (tween !== tween0) {
+	      tween1 = (tween0 = tween).slice();
 
-	                var dx = p[0] - startOrigin[0];
-	                var dy = p[1] - startOrigin[1];
-	                _event({
-	                    type: 'move',
-	                    point: [p[0] + offset[0],  p[1] + offset[1]],
-	                    delta: [dx, dy]
-	                });
-	            }
+	      for (var t = {
+	        name: name,
+	        value: value
+	      }, i = 0, n = tween1.length; i < n; ++i) {
+	        if (tween1[i].name === name) {
+	          tween1[i] = t;
+	          break;
 	        }
+	      }
 
-
-	        function pointerup() {
-	            if (_pointerId !== (event.pointerId || 'mouse')) { return; }
-
-	            _pointerId = null;
-
-	            if (started) {
-	                _event({ type: 'end' });
-
-	                event.preventDefault();
-	            }
-
-	            select(window)
-	                .on(_pointerPrefix + 'move.drag', null)
-	                .on(_pointerPrefix + 'up.drag pointercancel.drag', null);
-
-	            selectEnable();
-	        }
+	      if (i === n) tween1.push(t);
 	    }
 
+	    schedule.tween = tween1;
+	  };
+	}
 
-	    function behavior(selection) {
-	        _pointerId = null;
-	        var matchesSelector = utilPrefixDOMProperty('matchesSelector');
-	        var delegate = pointerdown;
-
-	        if (_selector) {
-	            delegate = function() {
-	                var root = this;
-	                var target = event.target;
-	                for (; target && target !== root; target = target.parentNode) {
-	                    var datum = target.__data__;
-
-	                    var entity = datum instanceof osmNote ? datum
-	                        : datum && datum.properties && datum.properties.entity;
+	function transition_tween (name, value) {
+	  var id = this._id;
+	  name += "";
 
-	                    if (entity && target[matchesSelector](_selector)) {
-	                        return pointerdown.call(target, entity);
-	                    }
-	                }
-	            };
-	        }
+	  if (arguments.length < 2) {
+	    var tween = get$4(this.node(), id).tween;
 
-	        selection
-	            .on(_pointerPrefix + 'down.drag' + _selector, delegate);
+	    for (var i = 0, n = tween.length, t; i < n; ++i) {
+	      if ((t = tween[i]).name === name) {
+	        return t.value;
+	      }
 	    }
 
+	    return null;
+	  }
 
-	    behavior.off = function(selection) {
-	        selection
-	            .on(_pointerPrefix + 'down.drag' + _selector, null);
-	    };
-
-
-	    behavior.selector = function(_) {
-	        if (!arguments.length) { return _selector; }
-	        _selector = _;
-	        return behavior;
-	    };
-
-
-	    behavior.origin = function(_) {
-	        if (!arguments.length) { return _origin; }
-	        _origin = _;
-	        return behavior;
-	    };
-
-
-	    behavior.cancel = function() {
-	        select(window)
-	            .on(_pointerPrefix + 'move.drag', null)
-	            .on(_pointerPrefix + 'up.drag pointercancel.drag', null);
-	        return behavior;
-	    };
-
-
-	    behavior.target = function() {
-	        if (!arguments.length) { return _target; }
-	        _target = arguments[0];
-	        _event = eventOf(_target, Array.prototype.slice.call(arguments, 1));
-	        return behavior;
-	    };
-
-
-	    behavior.surface = function() {
-	        if (!arguments.length) { return _surface; }
-	        _surface = arguments[0];
-	        return behavior;
-	    };
-
-
-	    return utilRebind(behavior, dispatch$1, 'on');
+	  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
+	}
+	function tweenValue(transition, name, value) {
+	  var id = transition._id;
+	  transition.each(function () {
+	    var schedule = set$4(this, id);
+	    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
+	  });
+	  return function (node) {
+	    return get$4(node, id).value[name];
+	  };
 	}
 
-	function modeDragNode(context) {
-	    var mode = {
-	        id: 'drag-node',
-	        button: 'browse'
-	    };
-	    var hover = behaviorHover(context).altDisables(true)
-	        .on('hover', context.ui().sidebar.hover);
-	    var edit = behaviorEdit(context);
+	function interpolate$1 (a, b) {
+	  var c;
+	  return (typeof b === "number" ? d3_interpolateNumber : b instanceof color ? d3_interpolateRgb : (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString)(a, b);
+	}
 
-	    var _nudgeInterval;
-	    var _restoreSelectedIDs = [];
-	    var _wasMidpoint = false;
-	    var _isCancelled = false;
-	    var _activeEntity;
-	    var _startLoc;
-	    var _lastLoc;
+	function attrRemove$1(name) {
+	  return function () {
+	    this.removeAttribute(name);
+	  };
+	}
 
+	function attrRemoveNS$1(fullname) {
+	  return function () {
+	    this.removeAttributeNS(fullname.space, fullname.local);
+	  };
+	}
 
-	    function startNudge(entity, nudge) {
-	        if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-	        _nudgeInterval = window.setInterval(function() {
-	            context.map().pan(nudge);
-	            doMove(entity, nudge);
-	        }, 50);
-	    }
+	function attrConstant$1(name, interpolate, value1) {
+	  var string00,
+	      string1 = value1 + "",
+	      interpolate0;
+	  return function () {
+	    var string0 = this.getAttribute(name);
+	    return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
+	  };
+	}
 
+	function attrConstantNS$1(fullname, interpolate, value1) {
+	  var string00,
+	      string1 = value1 + "",
+	      interpolate0;
+	  return function () {
+	    var string0 = this.getAttributeNS(fullname.space, fullname.local);
+	    return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
+	  };
+	}
 
-	    function stopNudge() {
-	        if (_nudgeInterval) {
-	            window.clearInterval(_nudgeInterval);
-	            _nudgeInterval = null;
-	        }
-	    }
+	function attrFunction$1(name, interpolate, value) {
+	  var string00, string10, interpolate0;
+	  return function () {
+	    var string0,
+	        value1 = value(this),
+	        string1;
+	    if (value1 == null) return void this.removeAttribute(name);
+	    string0 = this.getAttribute(name);
+	    string1 = value1 + "";
+	    return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+	  };
+	}
 
+	function attrFunctionNS$1(fullname, interpolate, value) {
+	  var string00, string10, interpolate0;
+	  return function () {
+	    var string0,
+	        value1 = value(this),
+	        string1;
+	    if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
+	    string0 = this.getAttributeNS(fullname.space, fullname.local);
+	    string1 = value1 + "";
+	    return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+	  };
+	}
 
-	    function moveAnnotation(entity) {
-	        return _t('operations.move.annotation.' + entity.geometry(context.graph()));
-	    }
+	function transition_attr (name, value) {
+	  var fullname = namespace(name),
+	      i = fullname === "transform" ? interpolateTransformSvg : interpolate$1;
+	  return this.attrTween(name, typeof value === "function" ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value)) : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname) : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value));
+	}
 
+	function attrInterpolate(name, i) {
+	  return function (t) {
+	    this.setAttribute(name, i.call(this, t));
+	  };
+	}
 
-	    function connectAnnotation(nodeEntity, targetEntity) {
-	        var nodeGeometry = nodeEntity.geometry(context.graph());
-	        var targetGeometry = targetEntity.geometry(context.graph());
-	        if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
-	            var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
-	            var targetParentWayIDs = context.graph().parentWays(targetEntity);
-	            var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs);
-	            // if both vertices are part of the same way
-	            if (sharedParentWays.length !== 0) {
-	                // if the nodes are next to each other, they are merged
-	                if (sharedParentWays[0].areAdjacent(nodeEntity.id, targetEntity.id)) {
-	                    return _t('operations.connect.annotation.from_vertex.to_adjacent_vertex');
-	                }
-	                return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
-	            }
-	        }
-	        return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
-	    }
+	function attrInterpolateNS(fullname, i) {
+	  return function (t) {
+	    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
+	  };
+	}
 
+	function attrTweenNS(fullname, value) {
+	  var t0, i0;
 
-	    function shouldSnapToNode(target) {
-	        if (!_activeEntity) { return false; }
-	        return _activeEntity.geometry(context.graph()) !== 'vertex' ||
-	            (target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph()));
-	    }
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && attrInterpolateNS(fullname, i);
+	    return t0;
+	  }
 
+	  tween._value = value;
+	  return tween;
+	}
 
-	    function origin(entity) {
-	        return context.projection(entity.loc);
-	    }
+	function attrTween(name, value) {
+	  var t0, i0;
 
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && attrInterpolate(name, i);
+	    return t0;
+	  }
 
-	    function keydown() {
-	        if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            if (context.surface().classed('nope')) {
-	                context.surface()
-	                    .classed('nope-suppressed', true);
-	            }
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-disabled', true);
-	        }
-	    }
+	  tween._value = value;
+	  return tween;
+	}
 
+	function transition_attrTween (name, value) {
+	  var key = "attr." + name;
+	  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+	  if (value == null) return this.tween(key, null);
+	  if (typeof value !== "function") throw new Error();
+	  var fullname = namespace(name);
+	  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
+	}
 
-	    function keyup() {
-	        if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            if (context.surface().classed('nope-suppressed')) {
-	                context.surface()
-	                    .classed('nope', true);
-	            }
-	            context.surface()
-	                .classed('nope-suppressed', false)
-	                .classed('nope-disabled', false);
-	        }
-	    }
+	function delayFunction(id, value) {
+	  return function () {
+	    init(this, id).delay = +value.apply(this, arguments);
+	  };
+	}
 
+	function delayConstant(id, value) {
+	  return value = +value, function () {
+	    init(this, id).delay = value;
+	  };
+	}
 
-	    function start(entity) {
-	        _wasMidpoint = entity.type === 'midpoint';
-	        var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
-	        _isCancelled = !context.editable() || event.sourceEvent.shiftKey || hasHidden;
+	function transition_delay (value) {
+	  var id = this._id;
+	  return arguments.length ? this.each((typeof value === "function" ? delayFunction : delayConstant)(id, value)) : get$4(this.node(), id).delay;
+	}
 
+	function durationFunction(id, value) {
+	  return function () {
+	    set$4(this, id).duration = +value.apply(this, arguments);
+	  };
+	}
 
-	        if (_isCancelled) {
-	            if (hasHidden) {
-	                context.ui().flash
-	                    .duration(4000)
-	                    .text(_t('modes.drag_node.connected_to_hidden'))();
-	            }
-	            return drag.cancel();
-	        }
+	function durationConstant(id, value) {
+	  return value = +value, function () {
+	    set$4(this, id).duration = value;
+	  };
+	}
 
-	        if (_wasMidpoint) {
-	            var midpoint = entity;
-	            entity = osmNode();
-	            context.perform(actionAddMidpoint(midpoint, entity));
-	            entity = context.entity(entity.id);   // get post-action entity
+	function transition_duration (value) {
+	  var id = this._id;
+	  return arguments.length ? this.each((typeof value === "function" ? durationFunction : durationConstant)(id, value)) : get$4(this.node(), id).duration;
+	}
 
-	            var vertex = context.surface().selectAll('.' + entity.id);
-	            drag.target(vertex.node(), entity);
+	function easeConstant(id, value) {
+	  if (typeof value !== "function") throw new Error();
+	  return function () {
+	    set$4(this, id).ease = value;
+	  };
+	}
 
-	        } else {
-	            context.perform(actionNoop());
-	        }
+	function transition_ease (value) {
+	  var id = this._id;
+	  return arguments.length ? this.each(easeConstant(id, value)) : get$4(this.node(), id).ease;
+	}
 
-	        _activeEntity = entity;
-	        _startLoc = entity.loc;
+	function easeVarying(id, value) {
+	  return function () {
+	    var v = value.apply(this, arguments);
+	    if (typeof v !== "function") throw new Error();
+	    set$4(this, id).ease = v;
+	  };
+	}
 
-	        hover.ignoreVertex(entity.geometry(context.graph()) === 'vertex');
+	function transition_easeVarying (value) {
+	  if (typeof value !== "function") throw new Error();
+	  return this.each(easeVarying(this._id, value));
+	}
 
-	        context.surface().selectAll('.' + _activeEntity.id)
-	            .classed('active', true);
+	function transition_filter (match) {
+	  if (typeof match !== "function") match = matcher(match);
 
-	        context.enter(mode);
+	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+	      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+	        subgroup.push(node);
+	      }
 	    }
+	  }
 
+	  return new Transition(subgroups, this._parents, this._name, this._id);
+	}
 
-	    // related code
-	    // - `behavior/draw.js` `datum()`
-	    function datum() {
-	        var event$1 = event && event.sourceEvent;
-	        if (!event$1 || event$1.altKey) {
-	            return {};
-	        } else {
-	            // When dragging, snap only to touch targets..
-	            // (this excludes area fills and active drawing elements)
-	            var d = event$1.target.__data__;
-	            return (d && d.properties && d.properties.target) ? d : {};
-	        }
+	function transition_merge (transition) {
+	  if (transition._id !== this._id) throw new Error();
+
+	  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+	    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+	      if (node = group0[i] || group1[i]) {
+	        merge[i] = node;
+	      }
 	    }
+	  }
 
+	  for (; j < m0; ++j) {
+	    merges[j] = groups0[j];
+	  }
 
-	    function doMove(entity, nudge) {
-	        nudge = nudge || [0, 0];
+	  return new Transition(merges, this._parents, this._name, this._id);
+	}
 
-	        var currPoint = (event && event.point) || context.projection(_lastLoc);
-	        var currMouse = geoVecSubtract(currPoint, nudge);
-	        var loc = context.projection.invert(currMouse);
+	function start(name) {
+	  return (name + "").trim().split(/^|\s+/).every(function (t) {
+	    var i = t.indexOf(".");
+	    if (i >= 0) t = t.slice(0, i);
+	    return !t || t === "start";
+	  });
+	}
 
-	        if (!_nudgeInterval) {   // If not nudging at the edge of the viewport, try to snap..
-	            // related code
-	            // - `mode/drag_node.js`     `doMove()`
-	            // - `behavior/draw.js`      `click()`
-	            // - `behavior/draw_way.js`  `move()`
-	            var d = datum();
-	            var target = d && d.properties && d.properties.entity;
-	            var targetLoc = target && target.loc;
-	            var targetNodes = d && d.properties && d.properties.nodes;
-	            var edge;
+	function onFunction(id, name, listener) {
+	  var on0,
+	      on1,
+	      sit = start(name) ? init : set$4;
+	  return function () {
+	    var schedule = sit(this, id),
+	        on = schedule.on; // If this node shared a dispatch with the previous node,
+	    // just assign the updated shared dispatch and we’re done!
+	    // Otherwise, copy-on-write.
 
-	            if (targetLoc) {   // snap to node/vertex - a point target with `.loc`
-	                if (shouldSnapToNode(target)) {
-	                    loc = targetLoc;
-	                }
+	    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
+	    schedule.on = on1;
+	  };
+	}
 
-	            } else if (targetNodes) {   // snap to way - a line target with `.nodes`
-	                edge = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, end.id);
-	                if (edge) {
-	                    loc = edge.loc;
-	                }
-	            }
-	        }
+	function transition_on (name, listener) {
+	  var id = this._id;
+	  return arguments.length < 2 ? get$4(this.node(), id).on.on(name) : this.each(onFunction(id, name, listener));
+	}
 
-	        context.replace(
-	            actionMoveNode(entity.id, loc)
-	        );
+	function removeFunction(id) {
+	  return function () {
+	    var parent = this.parentNode;
 
-	        // Below here: validations
-	        var isInvalid = false;
+	    for (var i in this.__transition) {
+	      if (+i !== id) return;
+	    }
 
-	        // Check if this connection to `target` could cause relations to break..
-	        if (target) {
-	            isInvalid = hasRelationConflict(entity, target, edge, context.graph());
-	        }
+	    if (parent) parent.removeChild(this);
+	  };
+	}
 
-	        // Check if this drag causes the geometry to break..
-	        if (!isInvalid) {
-	            isInvalid = hasInvalidGeometry(entity, context.graph());
-	        }
+	function transition_remove () {
+	  return this.on("end.remove", removeFunction(this._id));
+	}
 
+	function transition_select (select) {
+	  var name = this._name,
+	      id = this._id;
+	  if (typeof select !== "function") select = selector(select);
 
-	        var nope = context.surface().classed('nope');
-	        if (isInvalid === 'relation' || isInvalid === 'restriction') {
-	            if (!nope) {   // about to nope - show hint
-	                context.ui().flash
-	                    .duration(4000)
-	                    .text(_t('operations.connect.' + isInvalid,
-	                        { relation: _mainPresetIndex.item('type/restriction').name() }
-	                    ))();
-	            }
-	        } else if (isInvalid) {
-	            var errorID = isInvalid === 'line' ? 'lines' : 'areas';
-	            context.ui().flash
-	                .duration(3000)
-	                .text(_t('self_intersection.error.' + errorID))();
-	        } else {
-	            if (nope) {   // about to un-nope, remove hint
-	                context.ui().flash
-	                    .duration(1)
-	                    .text('')();
-	            }
-	        }
+	  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+	      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+	        if ("__data__" in node) subnode.__data__ = node.__data__;
+	        subgroup[i] = subnode;
+	        schedule(subgroup[i], name, id, i, subgroup, get$4(node, id));
+	      }
+	    }
+	  }
 
+	  return new Transition(subgroups, this._parents, name, id);
+	}
 
-	        var nopeDisabled = context.surface().classed('nope-disabled');
-	        if (nopeDisabled) {
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-suppressed', isInvalid);
-	        } else {
-	            context.surface()
-	                .classed('nope', isInvalid)
-	                .classed('nope-suppressed', false);
+	function transition_selectAll (select) {
+	  var name = this._name,
+	      id = this._id;
+	  if (typeof select !== "function") select = selectorAll(select);
+
+	  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        for (var children = select.call(node, node.__data__, i, group), child, inherit = get$4(node, id), k = 0, l = children.length; k < l; ++k) {
+	          if (child = children[k]) {
+	            schedule(child, name, id, k, children, inherit);
+	          }
 	        }
 
-	        _lastLoc = loc;
+	        subgroups.push(children);
+	        parents.push(node);
+	      }
 	    }
+	  }
 
+	  return new Transition(subgroups, parents, name, id);
+	}
 
-	    // Uses `actionConnect.disabled()` to know whether this connection is ok..
-	    function hasRelationConflict(entity, target, edge, graph) {
-	        var testGraph = graph.update();  // copy
-
-	        // if snapping to way - add midpoint there and consider that the target..
-	        if (edge) {
-	            var midpoint = osmNode();
-	            var action = actionAddMidpoint({
-	                loc: edge.loc,
-	                edge: [target.nodes[edge.index - 1], target.nodes[edge.index]]
-	            }, midpoint);
-
-	            testGraph = action(testGraph);
-	            target = midpoint;
-	        }
+	var Selection$1 = selection.prototype.constructor;
+	function transition_selection () {
+	  return new Selection$1(this._groups, this._parents);
+	}
 
-	        // can we connect to it?
-	        var ids = [entity.id, target.id];
-	        return actionConnect(ids).disabled(testGraph);
-	    }
+	function styleNull(name, interpolate) {
+	  var string00, string10, interpolate0;
+	  return function () {
+	    var string0 = styleValue(this, name),
+	        string1 = (this.style.removeProperty(name), styleValue(this, name));
+	    return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : interpolate0 = interpolate(string00 = string0, string10 = string1);
+	  };
+	}
 
+	function styleRemove$1(name) {
+	  return function () {
+	    this.style.removeProperty(name);
+	  };
+	}
 
-	    function hasInvalidGeometry(entity, graph) {
-	        var parents = graph.parentWays(entity);
-	        var i, j, k;
+	function styleConstant$1(name, interpolate, value1) {
+	  var string00,
+	      string1 = value1 + "",
+	      interpolate0;
+	  return function () {
+	    var string0 = styleValue(this, name);
+	    return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
+	  };
+	}
 
-	        for (i = 0; i < parents.length; i++) {
-	            var parent = parents[i];
-	            var nodes = [];
-	            var activeIndex = null;    // which multipolygon ring contains node being dragged
-
-	            // test any parent multipolygons for valid geometry
-	            var relations = graph.parentRelations(parent);
-	            for (j = 0; j < relations.length; j++) {
-	                if (!relations[j].isMultipolygon()) { continue; }
-
-	                var rings = osmJoinWays(relations[j].members, graph);
-
-	                // find active ring and test it for self intersections
-	                for (k = 0; k < rings.length; k++) {
-	                    nodes = rings[k].nodes;
-	                    if (nodes.find(function(n) { return n.id === entity.id; })) {
-	                        activeIndex = k;
-	                        if (geoHasSelfIntersections(nodes, entity.id)) {
-	                            return 'multipolygonMember';
-	                        }
-	                    }
-	                    rings[k].coords = nodes.map(function(n) { return n.loc; });
-	                }
+	function styleFunction$1(name, interpolate, value) {
+	  var string00, string10, interpolate0;
+	  return function () {
+	    var string0 = styleValue(this, name),
+	        value1 = value(this),
+	        string1 = value1 + "";
+	    if (value1 == null) string1 = value1 = (this.style.removeProperty(name), styleValue(this, name));
+	    return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+	  };
+	}
 
-	                // test active ring for intersections with other rings in the multipolygon
-	                for (k = 0; k < rings.length; k++) {
-	                    if (k === activeIndex) { continue; }
+	function styleMaybeRemove(id, name) {
+	  var on0,
+	      on1,
+	      listener0,
+	      key = "style." + name,
+	      event = "end." + key,
+	      remove;
+	  return function () {
+	    var schedule = set$4(this, id),
+	        on = schedule.on,
+	        listener = schedule.value[key] == null ? remove || (remove = styleRemove$1(name)) : undefined; // If this node shared a dispatch with the previous node,
+	    // just assign the updated shared dispatch and we’re done!
+	    // Otherwise, copy-on-write.
 
-	                    // make sure active ring doesnt cross passive rings
-	                    if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
-	                        return 'multipolygonRing';
-	                    }
-	                }
-	            }
+	    if (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);
+	    schedule.on = on1;
+	  };
+	}
 
+	function transition_style (name, value, priority) {
+	  var i = (name += "") === "transform" ? interpolateTransformCss : interpolate$1;
+	  return value == null ? this.styleTween(name, styleNull(name, i)).on("end.style." + name, styleRemove$1(name)) : typeof value === "function" ? this.styleTween(name, styleFunction$1(name, i, tweenValue(this, "style." + name, value))).each(styleMaybeRemove(this._id, name)) : this.styleTween(name, styleConstant$1(name, i, value), priority).on("end.style." + name, null);
+	}
 
-	            // If we still haven't tested this node's parent way for self-intersections.
-	            // (because it's not a member of a multipolygon), test it now.
-	            if (activeIndex === null) {
-	                nodes = parent.nodes.map(function(nodeID) { return graph.entity(nodeID); });
-	                if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
-	                    return parent.geometry(graph);
-	                }
-	            }
+	function styleInterpolate(name, i, priority) {
+	  return function (t) {
+	    this.style.setProperty(name, i.call(this, t), priority);
+	  };
+	}
 
-	        }
+	function styleTween(name, value, priority) {
+	  var t, i0;
 
-	        return false;
-	    }
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t = (i0 = i) && styleInterpolate(name, i, priority);
+	    return t;
+	  }
 
+	  tween._value = value;
+	  return tween;
+	}
 
-	    function move(entity) {
-	        if (_isCancelled) { return; }
-	        event.sourceEvent.stopPropagation();
+	function transition_styleTween (name, value, priority) {
+	  var key = "style." + (name += "");
+	  if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+	  if (value == null) return this.tween(key, null);
+	  if (typeof value !== "function") throw new Error();
+	  return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
+	}
 
-	        context.surface().classed('nope-disabled', event.sourceEvent.altKey);
+	function textConstant$1(value) {
+	  return function () {
+	    this.textContent = value;
+	  };
+	}
 
-	        _lastLoc = context.projection.invert(event.point);
+	function textFunction$1(value) {
+	  return function () {
+	    var value1 = value(this);
+	    this.textContent = value1 == null ? "" : value1;
+	  };
+	}
 
-	        doMove(entity);
-	        var nudge = geoViewportEdge(event.point, context.map().dimensions());
-	        if (nudge) {
-	            startNudge(entity, nudge);
-	        } else {
-	            stopNudge();
-	        }
-	    }
+	function transition_text (value) {
+	  return this.tween("text", typeof value === "function" ? textFunction$1(tweenValue(this, "text", value)) : textConstant$1(value == null ? "" : value + ""));
+	}
 
-	    function end(entity) {
-	        if (_isCancelled) { return; }
+	function textInterpolate(i) {
+	  return function (t) {
+	    this.textContent = i.call(this, t);
+	  };
+	}
 
-	        var wasPoint = entity.geometry(context.graph()) === 'point';
+	function textTween(value) {
+	  var t0, i0;
 
-	        var d = datum();
-	        var nope = (d && d.properties && d.properties.nope) || context.surface().classed('nope');
-	        var target = d && d.properties && d.properties.entity;   // entity to snap to
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && textInterpolate(i);
+	    return t0;
+	  }
 
-	        if (nope) {   // bounce back
-	            context.perform(
-	                _actionBounceBack(entity.id, _startLoc)
-	            );
+	  tween._value = value;
+	  return tween;
+	}
 
-	        } else if (target && target.type === 'way') {
-	            var choice = geoChooseEdge(context.graph().childNodes(target), context.map().mouse(), context.projection, entity.id);
-	            context.replace(
-	                actionAddMidpoint({
-	                    loc: choice.loc,
-	                    edge: [target.nodes[choice.index - 1], target.nodes[choice.index]]
-	                }, entity),
-	                connectAnnotation(entity, target)
-	            );
+	function transition_textTween (value) {
+	  var key = "text";
+	  if (arguments.length < 1) return (key = this.tween(key)) && key._value;
+	  if (value == null) return this.tween(key, null);
+	  if (typeof value !== "function") throw new Error();
+	  return this.tween(key, textTween(value));
+	}
 
-	        } else if (target && target.type === 'node' && shouldSnapToNode(target)) {
-	            context.replace(
-	                actionConnect([target.id, entity.id]),
-	                connectAnnotation(entity, target)
-	            );
+	function transition_transition () {
+	  var name = this._name,
+	      id0 = this._id,
+	      id1 = newId();
 
-	        } else if (_wasMidpoint) {
-	            context.replace(
-	                actionNoop(),
-	                _t('operations.add.annotation.vertex')
-	            );
+	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        var inherit = get$4(node, id0);
+	        schedule(node, name, id1, i, group, {
+	          time: inherit.time + inherit.delay + inherit.duration,
+	          delay: 0,
+	          duration: inherit.duration,
+	          ease: inherit.ease
+	        });
+	      }
+	    }
+	  }
 
-	        } else {
-	            context.replace(
-	                actionNoop(),
-	                moveAnnotation(entity)
-	            );
-	        }
+	  return new Transition(groups, this._parents, name, id1);
+	}
 
-	        if (wasPoint) {
-	            context.enter(modeSelect(context, [entity.id]));
+	function transition_end () {
+	  var on0,
+	      on1,
+	      that = this,
+	      id = that._id,
+	      size = that.size();
+	  return new Promise(function (resolve, reject) {
+	    var cancel = {
+	      value: reject
+	    },
+	        end = {
+	      value: function value() {
+	        if (--size === 0) resolve();
+	      }
+	    };
+	    that.each(function () {
+	      var schedule = set$4(this, id),
+	          on = schedule.on; // If this node shared a dispatch with the previous node,
+	      // just assign the updated shared dispatch and we’re done!
+	      // Otherwise, copy-on-write.
 
-	        } else {
-	            var reselection = _restoreSelectedIDs.filter(function(id) {
-	                return context.graph().hasEntity(id);
-	            });
+	      if (on !== on0) {
+	        on1 = (on0 = on).copy();
 
-	            if (reselection.length) {
-	                context.enter(modeSelect(context, reselection));
-	            } else {
-	                context.enter(modeBrowse(context));
-	            }
-	        }
-	    }
+	        on1._.cancel.push(cancel);
 
+	        on1._.interrupt.push(cancel);
 
-	    function _actionBounceBack(nodeID, toLoc) {
-	        var moveNode = actionMoveNode(nodeID, toLoc);
-	        var action = function(graph, t) {
-	            // last time through, pop off the bounceback perform.
-	            // it will then overwrite the initial perform with a moveNode that does nothing
-	            if (t === 1) { context.pop(); }
-	            return moveNode(graph, t);
-	        };
-	        action.transitionable = true;
-	        return action;
-	    }
+	        on1._.end.push(end);
+	      }
 
+	      schedule.on = on1;
+	    }); // The selection was empty, resolve end immediately
 
-	    function cancel() {
-	        drag.cancel();
-	        context.enter(modeBrowse(context));
-	    }
+	    if (size === 0) resolve();
+	  });
+	}
 
+	var id$1 = 0;
+	function Transition(groups, parents, name, id) {
+	  this._groups = groups;
+	  this._parents = parents;
+	  this._name = name;
+	  this._id = id;
+	}
+	function transition(name) {
+	  return selection().transition(name);
+	}
+	function newId() {
+	  return ++id$1;
+	}
+	var selection_prototype = selection.prototype;
+	Transition.prototype = transition.prototype = _defineProperty({
+	  constructor: Transition,
+	  select: transition_select,
+	  selectAll: transition_selectAll,
+	  filter: transition_filter,
+	  merge: transition_merge,
+	  selection: transition_selection,
+	  transition: transition_transition,
+	  call: selection_prototype.call,
+	  nodes: selection_prototype.nodes,
+	  node: selection_prototype.node,
+	  size: selection_prototype.size,
+	  empty: selection_prototype.empty,
+	  each: selection_prototype.each,
+	  on: transition_on,
+	  attr: transition_attr,
+	  attrTween: transition_attrTween,
+	  style: transition_style,
+	  styleTween: transition_styleTween,
+	  text: transition_text,
+	  textTween: transition_textTween,
+	  remove: transition_remove,
+	  tween: transition_tween,
+	  delay: transition_delay,
+	  duration: transition_duration,
+	  ease: transition_ease,
+	  easeVarying: transition_easeVarying,
+	  end: transition_end
+	}, Symbol.iterator, selection_prototype[Symbol.iterator]);
 
-	    var drag = behaviorDrag()
-	        .selector('.layer-touch.points .target')
-	        .surface(context.container().select('.main-map').node())
-	        .origin(origin)
-	        .on('start', start)
-	        .on('move', move)
-	        .on('end', end);
+	var linear$1 = function linear(t) {
+	  return +t;
+	};
 
+	function cubicInOut(t) {
+	  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
+	}
 
-	    mode.enter = function() {
-	        context.install(hover);
-	        context.install(edit);
+	var defaultTiming = {
+	  time: null,
+	  // Set on use.
+	  delay: 0,
+	  duration: 250,
+	  ease: cubicInOut
+	};
 
-	        select(window)
-	            .on('keydown.dragNode', keydown)
-	            .on('keyup.dragNode', keyup);
+	function inherit(node, id) {
+	  var timing;
 
-	        context.history()
-	            .on('undone.drag-node', cancel);
-	    };
+	  while (!(timing = node.__transition) || !(timing = timing[id])) {
+	    if (!(node = node.parentNode)) {
+	      throw new Error("transition ".concat(id, " not found"));
+	    }
+	  }
 
+	  return timing;
+	}
 
-	    mode.exit = function() {
-	        context.ui().sidebar.hover.cancel();
-	        context.uninstall(hover);
-	        context.uninstall(edit);
+	function selection_transition (name) {
+	  var id, timing;
 
-	        select(window)
-	            .on('keydown.dragNode', null)
-	            .on('keyup.dragNode', null);
+	  if (name instanceof Transition) {
+	    id = name._id, name = name._name;
+	  } else {
+	    id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
+	  }
 
-	        context.history()
-	            .on('undone.drag-node', null);
+	  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+	    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+	      if (node = group[i]) {
+	        schedule(node, name, id, i, group, timing || inherit(node, id));
+	      }
+	    }
+	  }
 
-	        _activeEntity = null;
+	  return new Transition(groups, this._parents, name, id);
+	}
 
-	        context.surface()
-	            .classed('nope', false)
-	            .classed('nope-suppressed', false)
-	            .classed('nope-disabled', false)
-	            .selectAll('.active')
-	            .classed('active', false);
+	selection.prototype.interrupt = selection_interrupt;
+	selection.prototype.transition = selection_transition;
 
-	        stopNudge();
-	    };
+	var constant$3 = (function (x) {
+	  return function () {
+	    return x;
+	  };
+	});
 
+	function ZoomEvent(type, _ref) {
+	  var sourceEvent = _ref.sourceEvent,
+	      target = _ref.target,
+	      transform = _ref.transform,
+	      dispatch = _ref.dispatch;
+	  Object.defineProperties(this, {
+	    type: {
+	      value: type,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    sourceEvent: {
+	      value: sourceEvent,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    target: {
+	      value: target,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    transform: {
+	      value: transform,
+	      enumerable: true,
+	      configurable: true
+	    },
+	    _: {
+	      value: dispatch
+	    }
+	  });
+	}
 
-	    mode.selectedIDs = function() {
-	        if (!arguments.length) { return _activeEntity ? [_activeEntity.id] : []; }
-	        // no assign
-	        return mode;
-	    };
+	function Transform(k, x, y) {
+	  this.k = k;
+	  this.x = x;
+	  this.y = y;
+	}
+	Transform.prototype = {
+	  constructor: Transform,
+	  scale: function scale(k) {
+	    return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
+	  },
+	  translate: function translate(x, y) {
+	    return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
+	  },
+	  apply: function apply(point) {
+	    return [point[0] * this.k + this.x, point[1] * this.k + this.y];
+	  },
+	  applyX: function applyX(x) {
+	    return x * this.k + this.x;
+	  },
+	  applyY: function applyY(y) {
+	    return y * this.k + this.y;
+	  },
+	  invert: function invert(location) {
+	    return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
+	  },
+	  invertX: function invertX(x) {
+	    return (x - this.x) / this.k;
+	  },
+	  invertY: function invertY(y) {
+	    return (y - this.y) / this.k;
+	  },
+	  rescaleX: function rescaleX(x) {
+	    return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
+	  },
+	  rescaleY: function rescaleY(y) {
+	    return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
+	  },
+	  toString: function toString() {
+	    return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
+	  }
+	};
+	var identity$2 = new Transform(1, 0, 0);
 
+	function nopropagation$1(event) {
+	  event.stopImmediatePropagation();
+	}
+	function noevent$1 (event) {
+	  event.preventDefault();
+	  event.stopImmediatePropagation();
+	}
 
-	    mode.activeID = function() {
-	        if (!arguments.length) { return _activeEntity && _activeEntity.id; }
-	        // no assign
-	        return mode;
-	    };
+	// except for pinch-to-zoom, which is sent as a wheel+ctrlKey event
 
+	function defaultFilter$1(event) {
+	  return (!event.ctrlKey || event.type === 'wheel') && !event.button;
+	}
 
-	    mode.restoreSelectedIDs = function(_) {
-	        if (!arguments.length) { return _restoreSelectedIDs; }
-	        _restoreSelectedIDs = _;
-	        return mode;
-	    };
+	function defaultExtent() {
+	  var e = this;
 
+	  if (e instanceof SVGElement) {
+	    e = e.ownerSVGElement || e;
 
-	    mode.behavior = drag;
+	    if (e.hasAttribute("viewBox")) {
+	      e = e.viewBox.baseVal;
+	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+	    }
 
+	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+	  }
 
-	    return mode;
+	  return [[0, 0], [e.clientWidth, e.clientHeight]];
 	}
 
-	function quickselect(arr, k, left, right, compare) {
-	    quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);
+	function defaultTransform() {
+	  return this.__zoom || identity$2;
 	}
 
-	function quickselectStep(arr, k, left, right, compare) {
+	function defaultWheelDelta(event) {
+	  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * (event.ctrlKey ? 10 : 1);
+	}
 
-	    while (right > left) {
-	        if (right - left > 600) {
-	            var n = right - left + 1;
-	            var m = k - left + 1;
-	            var z = Math.log(n);
-	            var s = 0.5 * Math.exp(2 * z / 3);
-	            var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
-	            var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
-	            var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
-	            quickselectStep(arr, k, newLeft, newRight, compare);
-	        }
+	function defaultTouchable$1() {
+	  return navigator.maxTouchPoints || "ontouchstart" in this;
+	}
 
-	        var t = arr[k];
-	        var i = left;
-	        var j = right;
+	function defaultConstrain(transform, extent, translateExtent) {
+	  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+	      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+	      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+	      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+	  return transform.translate(dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1));
+	}
 
-	        swap(arr, left, k);
-	        if (compare(arr[right], t) > 0) { swap(arr, left, right); }
+	function d3_zoom () {
+	  var filter = defaultFilter$1,
+	      extent = defaultExtent,
+	      constrain = defaultConstrain,
+	      wheelDelta = defaultWheelDelta,
+	      touchable = defaultTouchable$1,
+	      scaleExtent = [0, Infinity],
+	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+	      duration = 250,
+	      interpolate = interpolateZoom,
+	      listeners = dispatch("start", "zoom", "end"),
+	      touchstarting,
+	      touchfirst,
+	      touchending,
+	      touchDelay = 500,
+	      wheelDelay = 150,
+	      clickDistance2 = 0,
+	      tapDistance = 10;
 
-	        while (i < j) {
-	            swap(arr, i, j);
-	            i++;
-	            j--;
-	            while (compare(arr[i], t) < 0) { i++; }
-	            while (compare(arr[j], t) > 0) { j--; }
-	        }
+	  function zoom(selection) {
+	    selection.property("__zoom", defaultTransform).on("wheel.zoom", wheeled).on("mousedown.zoom", mousedowned).on("dblclick.zoom", dblclicked).filter(touchable).on("touchstart.zoom", touchstarted).on("touchmove.zoom", touchmoved).on("touchend.zoom touchcancel.zoom", touchended).style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+	  }
 
-	        if (compare(arr[left], t) === 0) { swap(arr, left, j); }
-	        else {
-	            j++;
-	            swap(arr, j, right);
-	        }
+	  zoom.transform = function (collection, transform, point, event) {
+	    var selection = collection.selection ? collection.selection() : collection;
+	    selection.property("__zoom", defaultTransform);
 
-	        if (j <= k) { left = j + 1; }
-	        if (k <= j) { right = j - 1; }
+	    if (collection !== selection) {
+	      schedule(collection, transform, point, event);
+	    } else {
+	      selection.interrupt().each(function () {
+	        gesture(this, arguments).event(event).start().zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform).end();
+	      });
 	    }
-	}
-
-	function swap(arr, i, j) {
-	    var tmp = arr[i];
-	    arr[i] = arr[j];
-	    arr[j] = tmp;
-	}
+	  };
 
-	function defaultCompare(a, b) {
-	    return a < b ? -1 : a > b ? 1 : 0;
-	}
+	  zoom.scaleBy = function (selection, k, p, event) {
+	    zoom.scaleTo(selection, function () {
+	      var k0 = this.__zoom.k,
+	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+	      return k0 * k1;
+	    }, p, event);
+	  };
 
-	var RBush = function RBush(maxEntries) {
-	    if ( maxEntries === void 0 ) maxEntries = 9;
+	  zoom.scaleTo = function (selection, k, p, event) {
+	    zoom.transform(selection, function () {
+	      var e = extent.apply(this, arguments),
+	          t0 = this.__zoom,
+	          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
+	          p1 = t0.invert(p0),
+	          k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+	      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
+	    }, p, event);
+	  };
 
-	    // max entries in a node is 9 by default; min node fill is 40% for best performance
-	    this._maxEntries = Math.max(4, maxEntries);
-	    this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
-	    this.clear();
-	};
+	  zoom.translateBy = function (selection, x, y, event) {
+	    zoom.transform(selection, function () {
+	      return constrain(this.__zoom.translate(typeof x === "function" ? x.apply(this, arguments) : x, typeof y === "function" ? y.apply(this, arguments) : y), extent.apply(this, arguments), translateExtent);
+	    }, null, event);
+	  };
 
-	RBush.prototype.all = function all () {
-	    return this._all(this.data, []);
-	};
+	  zoom.translateTo = function (selection, x, y, p, event) {
+	    zoom.transform(selection, function () {
+	      var e = extent.apply(this, arguments),
+	          t = this.__zoom,
+	          p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
+	      return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(typeof x === "function" ? -x.apply(this, arguments) : -x, typeof y === "function" ? -y.apply(this, arguments) : -y), e, translateExtent);
+	    }, p, event);
+	  };
 
-	RBush.prototype.search = function search (bbox) {
-	    var node = this.data;
-	    var result = [];
+	  function scale(transform, k) {
+	    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
+	    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+	  }
 
-	    if (!intersects(bbox, node)) { return result; }
+	  function translate(transform, p0, p1) {
+	    var x = p0[0] - p1[0] * transform.k,
+	        y = p0[1] - p1[1] * transform.k;
+	    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+	  }
 
-	    var toBBox = this.toBBox;
-	    var nodesToSearch = [];
+	  function centroid(extent) {
+	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+	  }
 
-	    while (node) {
-	        for (var i = 0; i < node.children.length; i++) {
-	            var child = node.children[i];
-	            var childBBox = node.leaf ? toBBox(child) : child;
+	  function schedule(transition, transform, point, event) {
+	    transition.on("start.zoom", function () {
+	      gesture(this, arguments).event(event).start();
+	    }).on("interrupt.zoom end.zoom", function () {
+	      gesture(this, arguments).event(event).end();
+	    }).tween("zoom", function () {
+	      var that = this,
+	          args = arguments,
+	          g = gesture(that, args).event(event),
+	          e = extent.apply(that, args),
+	          p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
+	          w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+	          a = that.__zoom,
+	          b = typeof transform === "function" ? transform.apply(that, args) : transform,
+	          i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+	      return function (t) {
+	        if (t === 1) t = b; // Avoid rounding error on end.
+	        else {
+	            var l = i(t),
+	                k = w / l[2];
+	            t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
+	          }
+	        g.zoom(null, t);
+	      };
+	    });
+	  }
 
-	            if (intersects(bbox, childBBox)) {
-	                if (node.leaf) { result.push(child); }
-	                else if (contains$1(bbox, childBBox)) { this._all(child, result); }
-	                else { nodesToSearch.push(child); }
-	            }
-	        }
-	        node = nodesToSearch.pop();
-	    }
+	  function gesture(that, args, clean) {
+	    return !clean && that.__zooming || new Gesture(that, args);
+	  }
 
-	    return result;
-	};
+	  function Gesture(that, args) {
+	    this.that = that;
+	    this.args = args;
+	    this.active = 0;
+	    this.sourceEvent = null;
+	    this.extent = extent.apply(that, args);
+	    this.taps = 0;
+	  }
 
-	RBush.prototype.collides = function collides (bbox) {
-	    var node = this.data;
+	  Gesture.prototype = {
+	    event: function event(_event) {
+	      if (_event) this.sourceEvent = _event;
+	      return this;
+	    },
+	    start: function start() {
+	      if (++this.active === 1) {
+	        this.that.__zooming = this;
+	        this.emit("start");
+	      }
 
-	    if (!intersects(bbox, node)) { return false; }
+	      return this;
+	    },
+	    zoom: function zoom(key, transform) {
+	      if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]);
+	      if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]);
+	      if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]);
+	      this.that.__zoom = transform;
+	      this.emit("zoom");
+	      return this;
+	    },
+	    end: function end() {
+	      if (--this.active === 0) {
+	        delete this.that.__zooming;
+	        this.emit("end");
+	      }
 
-	    var nodesToSearch = [];
-	    while (node) {
-	        for (var i = 0; i < node.children.length; i++) {
-	            var child = node.children[i];
-	            var childBBox = node.leaf ? this.toBBox(child) : child;
+	      return this;
+	    },
+	    emit: function emit(type) {
+	      var d = select(this.that).datum();
+	      listeners.call(type, this.that, new ZoomEvent(type, {
+	        sourceEvent: this.sourceEvent,
+	        target: zoom,
+	        type: type,
+	        transform: this.that.__zoom,
+	        dispatch: listeners
+	      }), d);
+	    }
+	  };
 
-	            if (intersects(bbox, childBBox)) {
-	                if (node.leaf || contains$1(bbox, childBBox)) { return true; }
-	                nodesToSearch.push(child);
-	            }
-	        }
-	        node = nodesToSearch.pop();
+	  function wheeled(event) {
+	    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+	      args[_key - 1] = arguments[_key];
 	    }
 
-	    return false;
-	};
+	    if (!filter.apply(this, arguments)) return;
+	    var g = gesture(this, args).event(event),
+	        t = this.__zoom,
+	        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
+	        p = pointer(event); // If the mouse is in the same location as before, reuse it.
+	    // If there were recent wheel events, reset the wheel idle timeout.
 
-	RBush.prototype.load = function load (data) {
-	    if (!(data && data.length)) { return this; }
+	    if (g.wheel) {
+	      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
+	        g.mouse[1] = t.invert(g.mouse[0] = p);
+	      }
 
-	    if (data.length < this._minEntries) {
-	        for (var i = 0; i < data.length; i++) {
-	            this.insert(data[i]);
+	      clearTimeout(g.wheel);
+	    } // If this wheel event won’t trigger a transform change, ignore it.
+	    else if (t.k === k) return; // Otherwise, capture the mouse point and location at the start.
+	      else {
+	          g.mouse = [p, t.invert(p)];
+	          interrupt(this);
+	          g.start();
 	        }
-	        return this;
+
+	    noevent$1(event);
+	    g.wheel = setTimeout(wheelidled, wheelDelay);
+	    g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+
+	    function wheelidled() {
+	      g.wheel = null;
+	      g.end();
 	    }
+	  }
 
-	    // recursively build the tree with the given data from scratch using OMT algorithm
-	    var node = this._build(data.slice(), 0, data.length - 1, 0);
+	  function mousedowned(event) {
+	    for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
+	      args[_key2 - 1] = arguments[_key2];
+	    }
 
-	    if (!this.data.children.length) {
-	        // save as is if tree is empty
-	        this.data = node;
+	    if (touchending || !filter.apply(this, arguments)) return;
+	    var g = gesture(this, args, true).event(event),
+	        v = select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
+	        p = pointer(event, currentTarget),
+	        currentTarget = event.currentTarget,
+	        x0 = event.clientX,
+	        y0 = event.clientY;
+	    dragDisable(event.view);
+	    nopropagation$1(event);
+	    g.mouse = [p, this.__zoom.invert(p)];
+	    interrupt(this);
+	    g.start();
 
-	    } else if (this.data.height === node.height) {
-	        // split root if trees have the same height
-	        this._splitRoot(this.data, node);
+	    function mousemoved(event) {
+	      noevent$1(event);
 
-	    } else {
-	        if (this.data.height < node.height) {
-	            // swap trees if inserted one is bigger
-	            var tmpNode = this.data;
-	            this.data = node;
-	            node = tmpNode;
-	        }
+	      if (!g.moved) {
+	        var dx = event.clientX - x0,
+	            dy = event.clientY - y0;
+	        g.moved = dx * dx + dy * dy > clickDistance2;
+	      }
 
-	        // insert the small tree into the large tree at appropriate level
-	        this._insert(node, this.data.height - node.height - 1, true);
+	      g.event(event).zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = pointer(event, currentTarget), g.mouse[1]), g.extent, translateExtent));
 	    }
 
-	    return this;
-	};
+	    function mouseupped(event) {
+	      v.on("mousemove.zoom mouseup.zoom", null);
+	      yesdrag(event.view, g.moved);
+	      noevent$1(event);
+	      g.event(event).end();
+	    }
+	  }
 
-	RBush.prototype.insert = function insert (item) {
-	    if (item) { this._insert(item, this.data.height - 1); }
-	    return this;
-	};
+	  function dblclicked(event) {
+	    for (var _len3 = arguments.length, args = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
+	      args[_key3 - 1] = arguments[_key3];
+	    }
 
-	RBush.prototype.clear = function clear () {
-	    this.data = createNode([]);
-	    return this;
-	};
+	    if (!filter.apply(this, arguments)) return;
+	    var t0 = this.__zoom,
+	        p0 = pointer(event.changedTouches ? event.changedTouches[0] : event, this),
+	        p1 = t0.invert(p0),
+	        k1 = t0.k * (event.shiftKey ? 0.5 : 2),
+	        t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, args), translateExtent);
+	    noevent$1(event);
+	    if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0, event);else select(this).call(zoom.transform, t1, p0, event);
+	  }
 
-	RBush.prototype.remove = function remove (item, equalsFn) {
-	    if (!item) { return this; }
+	  function touchstarted(event) {
+	    for (var _len4 = arguments.length, args = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
+	      args[_key4 - 1] = arguments[_key4];
+	    }
 
-	    var node = this.data;
-	    var bbox = this.toBBox(item);
-	    var path = [];
-	    var indexes = [];
-	    var i, parent, goingUp;
+	    if (!filter.apply(this, arguments)) return;
+	    var touches = event.touches,
+	        n = touches.length,
+	        g = gesture(this, args, event.changedTouches.length === n).event(event),
+	        started,
+	        i,
+	        t,
+	        p;
+	    nopropagation$1(event);
 
-	    // depth-first iterative tree traversal
-	    while (node || path.length) {
+	    for (i = 0; i < n; ++i) {
+	      t = touches[i], p = pointer(t, this);
+	      p = [p, this.__zoom.invert(p), t.identifier];
+	      if (!g.touch0) g.touch0 = p, started = true, g.taps = 1 + !!touchstarting;else if (!g.touch1 && g.touch0[2] !== p[2]) g.touch1 = p, g.taps = 0;
+	    }
 
-	        if (!node) { // go up
-	            node = path.pop();
-	            parent = path[path.length - 1];
-	            i = indexes.pop();
-	            goingUp = true;
-	        }
+	    if (touchstarting) touchstarting = clearTimeout(touchstarting);
 
-	        if (node.leaf) { // check current node
-	            var index = findItem(item, node.children, equalsFn);
+	    if (started) {
+	      if (g.taps < 2) touchfirst = p[0], touchstarting = setTimeout(function () {
+	        touchstarting = null;
+	      }, touchDelay);
+	      interrupt(this);
+	      g.start();
+	    }
+	  }
 
-	            if (index !== -1) {
-	                // item found, remove the item and condense tree upwards
-	                node.children.splice(index, 1);
-	                path.push(node);
-	                this._condense(path);
-	                return this;
-	            }
-	        }
+	  function touchmoved(event) {
+	    if (!this.__zooming) return;
 
-	        if (!goingUp && !node.leaf && contains$1(node, bbox)) { // go down
-	            path.push(node);
-	            indexes.push(i);
-	            i = 0;
-	            parent = node;
-	            node = node.children[0];
+	    for (var _len5 = arguments.length, args = new Array(_len5 > 1 ? _len5 - 1 : 0), _key5 = 1; _key5 < _len5; _key5++) {
+	      args[_key5 - 1] = arguments[_key5];
+	    }
 
-	        } else if (parent) { // go right
-	            i++;
-	            node = parent.children[i];
-	            goingUp = false;
+	    var g = gesture(this, args).event(event),
+	        touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        t,
+	        p,
+	        l;
+	    noevent$1(event);
 
-	        } else { node = null; } // nothing found
+	    for (i = 0; i < n; ++i) {
+	      t = touches[i], p = pointer(t, this);
+	      if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
 	    }
 
-	    return this;
-	};
-
-	RBush.prototype.toBBox = function toBBox (item) { return item; };
+	    t = g.that.__zoom;
 
-	RBush.prototype.compareMinX = function compareMinX (a, b) { return a.minX - b.minX; };
-	RBush.prototype.compareMinY = function compareMinY (a, b) { return a.minY - b.minY; };
+	    if (g.touch1) {
+	      var p0 = g.touch0[0],
+	          l0 = g.touch0[1],
+	          p1 = g.touch1[0],
+	          l1 = g.touch1[1],
+	          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
+	          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
+	      t = scale(t, Math.sqrt(dp / dl));
+	      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
+	      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
+	    } else if (g.touch0) p = g.touch0[0], l = g.touch0[1];else return;
 
-	RBush.prototype.toJSON = function toJSON () { return this.data; };
+	    g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
+	  }
 
-	RBush.prototype.fromJSON = function fromJSON (data) {
-	    this.data = data;
-	    return this;
-	};
+	  function touchended(event) {
+	    for (var _len6 = arguments.length, args = new Array(_len6 > 1 ? _len6 - 1 : 0), _key6 = 1; _key6 < _len6; _key6++) {
+	      args[_key6 - 1] = arguments[_key6];
+	    }
 
-	RBush.prototype._all = function _all (node, result) {
-	    var nodesToSearch = [];
-	    while (node) {
-	        if (node.leaf) { result.push.apply(result, node.children); }
-	        else { nodesToSearch.push.apply(nodesToSearch, node.children); }
+	    if (!this.__zooming) return;
+	    var g = gesture(this, args).event(event),
+	        touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        t;
+	    nopropagation$1(event);
+	    if (touchending) clearTimeout(touchending);
+	    touchending = setTimeout(function () {
+	      touchending = null;
+	    }, touchDelay);
 
-	        node = nodesToSearch.pop();
+	    for (i = 0; i < n; ++i) {
+	      t = touches[i];
+	      if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
 	    }
-	    return result;
-	};
 
-	RBush.prototype._build = function _build (items, left, right, height) {
+	    if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
+	    if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);else {
+	      g.end(); // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.
 
-	    var N = right - left + 1;
-	    var M = this._maxEntries;
-	    var node;
+	      if (g.taps === 2) {
+	        t = pointer(t, this);
 
-	    if (N <= M) {
-	        // reached leaf level; return leaf
-	        node = createNode(items.slice(left, right + 1));
-	        calcBBox(node, this.toBBox);
-	        return node;
+	        if (Math.hypot(touchfirst[0] - t[0], touchfirst[1] - t[1]) < tapDistance) {
+	          var p = select(this).on("dblclick.zoom");
+	          if (p) p.apply(this, arguments);
+	        }
+	      }
 	    }
+	  }
 
-	    if (!height) {
-	        // target height of the bulk-loaded tree
-	        height = Math.ceil(Math.log(N) / Math.log(M));
+	  zoom.wheelDelta = function (_) {
+	    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$3(+_), zoom) : wheelDelta;
+	  };
 
-	        // target number of root entries to maximize storage utilization
-	        M = Math.ceil(N / Math.pow(M, height - 1));
-	    }
+	  zoom.filter = function (_) {
+	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$3(!!_), zoom) : filter;
+	  };
 
-	    node = createNode([]);
-	    node.leaf = false;
-	    node.height = height;
+	  zoom.touchable = function (_) {
+	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$3(!!_), zoom) : touchable;
+	  };
 
-	    // split the items into M mostly square tiles
+	  zoom.extent = function (_) {
+	    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$3([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+	  };
 
-	    var N2 = Math.ceil(N / M);
-	    var N1 = N2 * Math.ceil(Math.sqrt(M));
+	  zoom.scaleExtent = function (_) {
+	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+	  };
 
-	    multiSelect(items, left, right, N1, this.compareMinX);
+	  zoom.translateExtent = function (_) {
+	    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+	  };
 
-	    for (var i = left; i <= right; i += N1) {
+	  zoom.constrain = function (_) {
+	    return arguments.length ? (constrain = _, zoom) : constrain;
+	  };
 
-	        var right2 = Math.min(i + N1 - 1, right);
+	  zoom.duration = function (_) {
+	    return arguments.length ? (duration = +_, zoom) : duration;
+	  };
 
-	        multiSelect(items, i, right2, N2, this.compareMinY);
+	  zoom.interpolate = function (_) {
+	    return arguments.length ? (interpolate = _, zoom) : interpolate;
+	  };
 
-	        for (var j = i; j <= right2; j += N2) {
+	  zoom.on = function () {
+	    var value = listeners.on.apply(listeners, arguments);
+	    return value === listeners ? zoom : value;
+	  };
 
-	            var right3 = Math.min(j + N2 - 1, right2);
+	  zoom.clickDistance = function (_) {
+	    return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+	  };
 
-	            // pack each entry recursively
-	            node.children.push(this._build(items, j, right3, height - 1));
-	        }
-	    }
+	  zoom.tapDistance = function (_) {
+	    return arguments.length ? (tapDistance = +_, zoom) : tapDistance;
+	  };
 
-	    calcBBox(node, this.toBBox);
+	  return zoom;
+	}
 
-	    return node;
-	};
+	/*
+	    Bypasses features of D3's default projection stream pipeline that are unnecessary:
+	    * Antimeridian clipping
+	    * Spherical rotation
+	    * Resampling
+	*/
 
-	RBush.prototype._chooseSubtree = function _chooseSubtree (bbox, node, level, path) {
-	    while (true) {
-	        path.push(node);
+	function geoRawMercator() {
+	  var project = mercatorRaw;
+	  var k = 512 / Math.PI; // scale
 
-	        if (node.leaf || path.length - 1 === level) { break; }
+	  var x = 0;
+	  var y = 0; // translate
 
-	        var minArea = Infinity;
-	        var minEnlargement = Infinity;
-	        var targetNode = (void 0);
+	  var clipExtent = [[0, 0], [0, 0]];
 
-	        for (var i = 0; i < node.children.length; i++) {
-	            var child = node.children[i];
-	            var area = bboxArea(child);
-	            var enlargement = enlargedArea(bbox, child) - area;
-
-	            // choose entry with the least area enlargement
-	            if (enlargement < minEnlargement) {
-	                minEnlargement = enlargement;
-	                minArea = area < minArea ? area : minArea;
-	                targetNode = child;
-
-	            } else if (enlargement === minEnlargement) {
-	                // otherwise choose one with the smallest area
-	                if (area < minArea) {
-	                    minArea = area;
-	                    targetNode = child;
-	                }
-	            }
-	        }
+	  function projection(point) {
+	    point = project(point[0] * Math.PI / 180, point[1] * Math.PI / 180);
+	    return [point[0] * k + x, y - point[1] * k];
+	  }
 
-	        node = targetNode || node.children[0];
-	    }
+	  projection.invert = function (point) {
+	    point = project.invert((point[0] - x) / k, (y - point[1]) / k);
+	    return point && [point[0] * 180 / Math.PI, point[1] * 180 / Math.PI];
+	  };
 
-	    return node;
-	};
+	  projection.scale = function (_) {
+	    if (!arguments.length) return k;
+	    k = +_;
+	    return projection;
+	  };
 
-	RBush.prototype._insert = function _insert (item, level, isNode) {
-	    var bbox = isNode ? item : this.toBBox(item);
-	    var insertPath = [];
+	  projection.translate = function (_) {
+	    if (!arguments.length) return [x, y];
+	    x = +_[0];
+	    y = +_[1];
+	    return projection;
+	  };
 
-	    // find the best node for accommodating the item, saving all nodes along the path too
-	    var node = this._chooseSubtree(bbox, this.data, level, insertPath);
+	  projection.clipExtent = function (_) {
+	    if (!arguments.length) return clipExtent;
+	    clipExtent = _;
+	    return projection;
+	  };
 
-	    // put the item into the node
-	    node.children.push(item);
-	    extend$1(node, bbox);
+	  projection.transform = function (obj) {
+	    if (!arguments.length) return identity$2.translate(x, y).scale(k);
+	    x = +obj.x;
+	    y = +obj.y;
+	    k = +obj.k;
+	    return projection;
+	  };
 
-	    // split on node overflow; propagate upwards if necessary
-	    while (level >= 0) {
-	        if (insertPath[level].children.length > this._maxEntries) {
-	            this._split(insertPath, level);
-	            level--;
-	        } else { break; }
+	  projection.stream = d3_geoTransform({
+	    point: function point(x, y) {
+	      var vec = projection([x, y]);
+	      this.stream.point(vec[0], vec[1]);
 	    }
+	  }).stream;
+	  return projection;
+	}
 
-	    // adjust bboxes along the insertion path
-	    this._adjustParentBBoxes(bbox, insertPath, level);
-	};
+	function geoOrthoNormalizedDotProduct(a, b, origin) {
+	  if (geoVecEqual(origin, a) || geoVecEqual(origin, b)) {
+	    return 1; // coincident points, treat as straight and try to remove
+	  }
 
-	// split overflowed node into two
-	RBush.prototype._split = function _split (insertPath, level) {
-	    var node = insertPath[level];
-	    var M = node.children.length;
-	    var m = this._minEntries;
+	  return geoVecNormalizedDot(a, b, origin);
+	}
 
-	    this._chooseSplitAxis(node, m, M);
+	function geoOrthoFilterDotProduct(dotp, epsilon, lowerThreshold, upperThreshold, allowStraightAngles) {
+	  var val = Math.abs(dotp);
+
+	  if (val < epsilon) {
+	    return 0; // already orthogonal
+	  } else if (allowStraightAngles && Math.abs(val - 1) < epsilon) {
+	    return 0; // straight angle, which is okay in this case
+	  } else if (val < lowerThreshold || val > upperThreshold) {
+	    return dotp; // can be adjusted
+	  } else {
+	    return null; // ignore vertex
+	  }
+	}
 
-	    var splitIndex = this._chooseSplitIndex(node, m, M);
+	function geoOrthoCalcScore(points, isClosed, epsilon, threshold) {
+	  var score = 0;
+	  var first = isClosed ? 0 : 1;
+	  var last = isClosed ? points.length : points.length - 1;
+	  var coords = points.map(function (p) {
+	    return p.coord;
+	  });
+	  var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+	  var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-	    var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
-	    newNode.height = node.height;
-	    newNode.leaf = node.leaf;
+	  for (var i = first; i < last; i++) {
+	    var a = coords[(i - 1 + coords.length) % coords.length];
+	    var origin = coords[i];
+	    var b = coords[(i + 1) % coords.length];
+	    var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold);
+	    if (dotp === null) continue; // ignore vertex
 
-	    calcBBox(node, this.toBBox);
-	    calcBBox(newNode, this.toBBox);
+	    score = score + 2.0 * Math.min(Math.abs(dotp - 1.0), Math.min(Math.abs(dotp), Math.abs(dotp + 1)));
+	  }
 
-	    if (level) { insertPath[level - 1].children.push(newNode); }
-	    else { this._splitRoot(node, newNode); }
-	};
+	  return score;
+	} // returns the maximum angle less than `lessThan` between the actual corner and a 0° or 90° corner
 
-	RBush.prototype._splitRoot = function _splitRoot (node, newNode) {
-	    // split root node
-	    this.data = createNode([node, newNode]);
-	    this.data.height = node.height + 1;
-	    this.data.leaf = false;
-	    calcBBox(this.data, this.toBBox);
-	};
+	function geoOrthoMaxOffsetAngle(coords, isClosed, lessThan) {
+	  var max = -Infinity;
+	  var first = isClosed ? 0 : 1;
+	  var last = isClosed ? coords.length : coords.length - 1;
 
-	RBush.prototype._chooseSplitIndex = function _chooseSplitIndex (node, m, M) {
-	    var index;
-	    var minOverlap = Infinity;
-	    var minArea = Infinity;
+	  for (var i = first; i < last; i++) {
+	    var a = coords[(i - 1 + coords.length) % coords.length];
+	    var origin = coords[i];
+	    var b = coords[(i + 1) % coords.length];
+	    var normalizedDotP = geoOrthoNormalizedDotProduct(a, b, origin);
+	    var angle = Math.acos(Math.abs(normalizedDotP)) * 180 / Math.PI;
+	    if (angle > 45) angle = 90 - angle;
+	    if (angle >= lessThan) continue;
+	    if (angle > max) max = angle;
+	  }
 
-	    for (var i = m; i <= M - m; i++) {
-	        var bbox1 = distBBox(node, 0, i, this.toBBox);
-	        var bbox2 = distBBox(node, i, M, this.toBBox);
+	  if (max === -Infinity) return null;
+	  return max;
+	} // similar to geoOrthoCalcScore, but returns quickly if there is something to do
 
-	        var overlap = intersectionArea(bbox1, bbox2);
-	        var area = bboxArea(bbox1) + bboxArea(bbox2);
+	function geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles) {
+	  var score = null;
+	  var first = isClosed ? 0 : 1;
+	  var last = isClosed ? coords.length : coords.length - 1;
+	  var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+	  var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-	        // choose distribution with minimum overlap
-	        if (overlap < minOverlap) {
-	            minOverlap = overlap;
-	            index = i;
+	  for (var i = first; i < last; i++) {
+	    var a = coords[(i - 1 + coords.length) % coords.length];
+	    var origin = coords[i];
+	    var b = coords[(i + 1) % coords.length];
+	    var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold, allowStraightAngles);
+	    if (dotp === null) continue; // ignore vertex
 
-	            minArea = area < minArea ? area : minArea;
+	    if (Math.abs(dotp) > 0) return 1; // something to do
 
-	        } else if (overlap === minOverlap) {
-	            // otherwise choose distribution with minimum area
-	            if (area < minArea) {
-	                minArea = area;
-	                index = i;
-	            }
-	        }
-	    }
+	    score = 0; // already square
+	  }
 
-	    return index || M - m;
-	};
+	  return score;
+	}
 
-	// sorts node children by the best axis for split
-	RBush.prototype._chooseSplitAxis = function _chooseSplitAxis (node, m, M) {
-	    var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
-	    var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
-	    var xMargin = this._allDistMargin(node, m, M, compareMinX);
-	    var yMargin = this._allDistMargin(node, m, M, compareMinY);
+	var onFreeze = internalMetadata.onFreeze;
 
-	    // if total distributions margin value is minimal for x, sort by minX,
-	    // otherwise it's already sorted by minY
-	    if (xMargin < yMargin) { node.children.sort(compareMinX); }
-	};
+	var nativeFreeze = Object.freeze;
+	var FAILS_ON_PRIMITIVES$4 = fails(function () { nativeFreeze(1); });
 
-	// total margin of all possible split distributions where each node is at least m full
-	RBush.prototype._allDistMargin = function _allDistMargin (node, m, M, compare) {
-	    node.children.sort(compare);
+	// `Object.freeze` method
+	// https://tc39.github.io/ecma262/#sec-object.freeze
+	_export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$4, sham: !freezing }, {
+	  freeze: function freeze(it) {
+	    return nativeFreeze && isObject(it) ? nativeFreeze(onFreeze(it)) : it;
+	  }
+	});
 
-	    var toBBox = this.toBBox;
-	    var leftBBox = distBBox(node, 0, m, toBBox);
-	    var rightBBox = distBBox(node, M - m, M, toBBox);
-	    var margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);
+	// Returns true if a and b have the same elements at the same indices.
+	function utilArrayIdentical(a, b) {
+	  // an array is always identical to itself
+	  if (a === b) return true;
+	  var i = a.length;
+	  if (i !== b.length) return false;
 
-	    for (var i = m; i < M - m; i++) {
-	        var child = node.children[i];
-	        extend$1(leftBBox, node.leaf ? toBBox(child) : child);
-	        margin += bboxMargin(leftBBox);
-	    }
+	  while (i--) {
+	    if (a[i] !== b[i]) return false;
+	  }
 
-	    for (var i$1 = M - m - 1; i$1 >= m; i$1--) {
-	        var child$1 = node.children[i$1];
-	        extend$1(rightBBox, node.leaf ? toBBox(child$1) : child$1);
-	        margin += bboxMargin(rightBBox);
-	    }
+	  return true;
+	} // http://2ality.com/2015/01/es6-set-operations.html
+	// Difference (a \ b): create a set that contains those elements of set a that are not in set b.
+	// This operation is also sometimes called minus (-).
+	// var a = [1,2,3];
+	// var b = [4,3,2];
+	// utilArrayDifference(a, b)
+	//   [1]
+	// utilArrayDifference(b, a)
+	//   [4]
 
-	    return margin;
-	};
+	function utilArrayDifference(a, b) {
+	  var other = new Set(b);
+	  return Array.from(new Set(a)).filter(function (v) {
+	    return !other.has(v);
+	  });
+	} // Intersection (a ∩ b): create a set that contains those elements of set a that are also in set b.
+	// var a = [1,2,3];
+	// var b = [4,3,2];
+	// utilArrayIntersection(a, b)
+	//   [2,3]
 
-	RBush.prototype._adjustParentBBoxes = function _adjustParentBBoxes (bbox, path, level) {
-	    // adjust bboxes along the given tree path
-	    for (var i = level; i >= 0; i--) {
-	        extend$1(path[i], bbox);
-	    }
-	};
+	function utilArrayIntersection(a, b) {
+	  var other = new Set(b);
+	  return Array.from(new Set(a)).filter(function (v) {
+	    return other.has(v);
+	  });
+	} // Union (a ∪ b): create a set that contains the elements of both set a and set b.
+	// var a = [1,2,3];
+	// var b = [4,3,2];
+	// utilArrayUnion(a, b)
+	//   [1,2,3,4]
 
-	RBush.prototype._condense = function _condense (path) {
-	    // go through the path, removing empty nodes and updating bboxes
-	    for (var i = path.length - 1, siblings = (void 0); i >= 0; i--) {
-	        if (path[i].children.length === 0) {
-	            if (i > 0) {
-	                siblings = path[i - 1].children;
-	                siblings.splice(siblings.indexOf(path[i]), 1);
+	function utilArrayUnion(a, b) {
+	  var result = new Set(a);
+	  b.forEach(function (v) {
+	    result.add(v);
+	  });
+	  return Array.from(result);
+	} // Returns an Array with all the duplicates removed
+	// var a = [1,1,2,3,3];
+	// utilArrayUniq(a)
+	//   [1,2,3]
+
+	function utilArrayUniq(a) {
+	  return Array.from(new Set(a));
+	} // Splits array into chunks of given chunk size
+	// var a = [1,2,3,4,5,6,7];
+	// utilArrayChunk(a, 3);
+	//   [[1,2,3],[4,5,6],[7]];
 
-	            } else { this.clear(); }
+	function utilArrayChunk(a, chunkSize) {
+	  if (!chunkSize || chunkSize < 0) return [a.slice()];
+	  var result = new Array(Math.ceil(a.length / chunkSize));
+	  return Array.from(result, function (item, i) {
+	    return a.slice(i * chunkSize, i * chunkSize + chunkSize);
+	  });
+	} // Flattens two level array into a single level
+	// var a = [[1,2,3],[4,5,6],[7]];
+	// utilArrayFlatten(a);
+	//   [1,2,3,4,5,6,7];
 
-	        } else { calcBBox(path[i], this.toBBox); }
-	    }
-	};
+	function utilArrayFlatten(a) {
+	  return a.reduce(function (acc, val) {
+	    return acc.concat(val);
+	  }, []);
+	} // Groups the items of the Array according to the given key
+	// `key` can be passed as a property or as a key function
+	//
+	// var pets = [
+	//     { type: 'Dog', name: 'Spot' },
+	//     { type: 'Cat', name: 'Tiger' },
+	//     { type: 'Dog', name: 'Rover' },
+	//     { type: 'Cat', name: 'Leo' }
+	// ];
+	//
+	// utilArrayGroupBy(pets, 'type')
+	//   {
+	//     'Dog': [{type: 'Dog', name: 'Spot'}, {type: 'Dog', name: 'Rover'}],
+	//     'Cat': [{type: 'Cat', name: 'Tiger'}, {type: 'Cat', name: 'Leo'}]
+	//   }
+	//
+	// utilArrayGroupBy(pets, function(item) { return item.name.length; })
+	//   {
+	//     3: [{type: 'Cat', name: 'Leo'}],
+	//     4: [{type: 'Dog', name: 'Spot'}],
+	//     5: [{type: 'Cat', name: 'Tiger'}, {type: 'Dog', name: 'Rover'}]
+	//   }
 
-	function findItem(item, items, equalsFn) {
-	    if (!equalsFn) { return items.indexOf(item); }
+	function utilArrayGroupBy(a, key) {
+	  return a.reduce(function (acc, item) {
+	    var group = typeof key === 'function' ? key(item) : item[key];
+	    (acc[group] = acc[group] || []).push(item);
+	    return acc;
+	  }, {});
+	} // Returns an Array with all the duplicates removed
+	// where uniqueness determined by the given key
+	// `key` can be passed as a property or as a key function
+	//
+	// var pets = [
+	//     { type: 'Dog', name: 'Spot' },
+	//     { type: 'Cat', name: 'Tiger' },
+	//     { type: 'Dog', name: 'Rover' },
+	//     { type: 'Cat', name: 'Leo' }
+	// ];
+	//
+	// utilArrayUniqBy(pets, 'type')
+	//   [
+	//     { type: 'Dog', name: 'Spot' },
+	//     { type: 'Cat', name: 'Tiger' }
+	//   ]
+	//
+	// utilArrayUniqBy(pets, function(item) { return item.name.length; })
+	//   [
+	//     { type: 'Dog', name: 'Spot' },
+	//     { type: 'Cat', name: 'Tiger' },
+	//     { type: 'Cat', name: 'Leo' }
+	//   }
+
+	function utilArrayUniqBy(a, key) {
+	  var seen = new Set();
+	  return a.reduce(function (acc, item) {
+	    var val = typeof key === 'function' ? key(item) : item[key];
 
-	    for (var i = 0; i < items.length; i++) {
-	        if (equalsFn(item, items[i])) { return i; }
+	    if (val && !seen.has(val)) {
+	      seen.add(val);
+	      acc.push(item);
 	    }
-	    return -1;
-	}
 
-	// calculate node's bbox from bboxes of its children
-	function calcBBox(node, toBBox) {
-	    distBBox(node, 0, node.children.length, toBBox, node);
+	    return acc;
+	  }, []);
 	}
 
-	// min bounding rectangle of node children from k to p-1
-	function distBBox(node, k, p, toBBox, destNode) {
-	    if (!destNode) { destNode = createNode(null); }
-	    destNode.minX = Infinity;
-	    destNode.minY = Infinity;
-	    destNode.maxX = -Infinity;
-	    destNode.maxY = -Infinity;
-
-	    for (var i = k; i < p; i++) {
-	        var child = node.children[i];
-	        extend$1(destNode, node.leaf ? toBBox(child) : child);
+	// @@match logic
+	fixRegexpWellKnownSymbolLogic('match', 1, function (MATCH, nativeMatch, maybeCallNative) {
+	  return [
+	    // `String.prototype.match` method
+	    // https://tc39.github.io/ecma262/#sec-string.prototype.match
+	    function match(regexp) {
+	      var O = requireObjectCoercible(this);
+	      var matcher = regexp == undefined ? undefined : regexp[MATCH];
+	      return matcher !== undefined ? matcher.call(regexp, O) : new RegExp(regexp)[MATCH](String(O));
+	    },
+	    // `RegExp.prototype[@@match]` method
+	    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@match
+	    function (regexp) {
+	      var res = maybeCallNative(nativeMatch, regexp, this);
+	      if (res.done) return res.value;
+
+	      var rx = anObject(regexp);
+	      var S = String(this);
+
+	      if (!rx.global) return regexpExecAbstract(rx, S);
+
+	      var fullUnicode = rx.unicode;
+	      rx.lastIndex = 0;
+	      var A = [];
+	      var n = 0;
+	      var result;
+	      while ((result = regexpExecAbstract(rx, S)) !== null) {
+	        var matchStr = String(result[0]);
+	        A[n] = matchStr;
+	        if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);
+	        n++;
+	      }
+	      return n === 0 ? null : A;
 	    }
+	  ];
+	});
+
+	var remove$1 = removeDiacritics;
+	var replacementList = [{
+	  base: ' ',
+	  chars: "\xA0"
+	}, {
+	  base: '0',
+	  chars: "\u07C0"
+	}, {
+	  base: 'A',
+	  chars: "\u24B6\uFF21\xC0\xC1\xC2\u1EA6\u1EA4\u1EAA\u1EA8\xC3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\xC4\u01DE\u1EA2\xC5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F"
+	}, {
+	  base: 'AA',
+	  chars: "\uA732"
+	}, {
+	  base: 'AE',
+	  chars: "\xC6\u01FC\u01E2"
+	}, {
+	  base: 'AO',
+	  chars: "\uA734"
+	}, {
+	  base: 'AU',
+	  chars: "\uA736"
+	}, {
+	  base: 'AV',
+	  chars: "\uA738\uA73A"
+	}, {
+	  base: 'AY',
+	  chars: "\uA73C"
+	}, {
+	  base: 'B',
+	  chars: "\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0181"
+	}, {
+	  base: 'C',
+	  chars: "\u24B8\uFF23\uA73E\u1E08\u0106C\u0108\u010A\u010C\xC7\u0187\u023B"
+	}, {
+	  base: 'D',
+	  chars: "\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018A\u0189\u1D05\uA779"
+	}, {
+	  base: 'Dh',
+	  chars: "\xD0"
+	}, {
+	  base: 'DZ',
+	  chars: "\u01F1\u01C4"
+	}, {
+	  base: 'Dz',
+	  chars: "\u01F2\u01C5"
+	}, {
+	  base: 'E',
+	  chars: "\u025B\u24BA\uFF25\xC8\xC9\xCA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\xCB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E\u1D07"
+	}, {
+	  base: 'F',
+	  chars: "\uA77C\u24BB\uFF26\u1E1E\u0191\uA77B"
+	}, {
+	  base: 'G',
+	  chars: "\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E\u0262"
+	}, {
+	  base: 'H',
+	  chars: "\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D"
+	}, {
+	  base: 'I',
+	  chars: "\u24BE\uFF29\xCC\xCD\xCE\u0128\u012A\u012C\u0130\xCF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197"
+	}, {
+	  base: 'J',
+	  chars: "\u24BF\uFF2A\u0134\u0248\u0237"
+	}, {
+	  base: 'K',
+	  chars: "\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2"
+	}, {
+	  base: 'L',
+	  chars: "\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780"
+	}, {
+	  base: 'LJ',
+	  chars: "\u01C7"
+	}, {
+	  base: 'Lj',
+	  chars: "\u01C8"
+	}, {
+	  base: 'M',
+	  chars: "\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C\u03FB"
+	}, {
+	  base: 'N',
+	  chars: "\uA7A4\u0220\u24C3\uFF2E\u01F8\u0143\xD1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u019D\uA790\u1D0E"
+	}, {
+	  base: 'NJ',
+	  chars: "\u01CA"
+	}, {
+	  base: 'Nj',
+	  chars: "\u01CB"
+	}, {
+	  base: 'O',
+	  chars: "\u24C4\uFF2F\xD2\xD3\xD4\u1ED2\u1ED0\u1ED6\u1ED4\xD5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\xD6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\xD8\u01FE\u0186\u019F\uA74A\uA74C"
+	}, {
+	  base: 'OE',
+	  chars: "\u0152"
+	}, {
+	  base: 'OI',
+	  chars: "\u01A2"
+	}, {
+	  base: 'OO',
+	  chars: "\uA74E"
+	}, {
+	  base: 'OU',
+	  chars: "\u0222"
+	}, {
+	  base: 'P',
+	  chars: "\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754"
+	}, {
+	  base: 'Q',
+	  chars: "\u24C6\uFF31\uA756\uA758\u024A"
+	}, {
+	  base: 'R',
+	  chars: "\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782"
+	}, {
+	  base: 'S',
+	  chars: "\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784"
+	}, {
+	  base: 'T',
+	  chars: "\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786"
+	}, {
+	  base: 'Th',
+	  chars: "\xDE"
+	}, {
+	  base: 'TZ',
+	  chars: "\uA728"
+	}, {
+	  base: 'U',
+	  chars: "\u24CA\uFF35\xD9\xDA\xDB\u0168\u1E78\u016A\u1E7A\u016C\xDC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244"
+	}, {
+	  base: 'V',
+	  chars: "\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245"
+	}, {
+	  base: 'VY',
+	  chars: "\uA760"
+	}, {
+	  base: 'W',
+	  chars: "\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72"
+	}, {
+	  base: 'X',
+	  chars: "\u24CD\uFF38\u1E8A\u1E8C"
+	}, {
+	  base: 'Y',
+	  chars: "\u24CE\uFF39\u1EF2\xDD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE"
+	}, {
+	  base: 'Z',
+	  chars: "\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762"
+	}, {
+	  base: 'a',
+	  chars: "\u24D0\uFF41\u1E9A\xE0\xE1\xE2\u1EA7\u1EA5\u1EAB\u1EA9\xE3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\xE4\u01DF\u1EA3\xE5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250\u0251"
+	}, {
+	  base: 'aa',
+	  chars: "\uA733"
+	}, {
+	  base: 'ae',
+	  chars: "\xE6\u01FD\u01E3"
+	}, {
+	  base: 'ao',
+	  chars: "\uA735"
+	}, {
+	  base: 'au',
+	  chars: "\uA737"
+	}, {
+	  base: 'av',
+	  chars: "\uA739\uA73B"
+	}, {
+	  base: 'ay',
+	  chars: "\uA73D"
+	}, {
+	  base: 'b',
+	  chars: "\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253\u0182"
+	}, {
+	  base: 'c',
+	  chars: "\uFF43\u24D2\u0107\u0109\u010B\u010D\xE7\u1E09\u0188\u023C\uA73F\u2184"
+	}, {
+	  base: 'd',
+	  chars: "\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\u018B\u13E7\u0501\uA7AA"
+	}, {
+	  base: 'dh',
+	  chars: "\xF0"
+	}, {
+	  base: 'dz',
+	  chars: "\u01F3\u01C6"
+	}, {
+	  base: 'e',
+	  chars: "\u24D4\uFF45\xE8\xE9\xEA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\xEB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u01DD"
+	}, {
+	  base: 'f',
+	  chars: "\u24D5\uFF46\u1E1F\u0192"
+	}, {
+	  base: 'ff',
+	  chars: "\uFB00"
+	}, {
+	  base: 'fi',
+	  chars: "\uFB01"
+	}, {
+	  base: 'fl',
+	  chars: "\uFB02"
+	}, {
+	  base: 'ffi',
+	  chars: "\uFB03"
+	}, {
+	  base: 'ffl',
+	  chars: "\uFB04"
+	}, {
+	  base: 'g',
+	  chars: "\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\uA77F\u1D79"
+	}, {
+	  base: 'h',
+	  chars: "\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265"
+	}, {
+	  base: 'hv',
+	  chars: "\u0195"
+	}, {
+	  base: 'i',
+	  chars: "\u24D8\uFF49\xEC\xED\xEE\u0129\u012B\u012D\xEF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131"
+	}, {
+	  base: 'j',
+	  chars: "\u24D9\uFF4A\u0135\u01F0\u0249"
+	}, {
+	  base: 'k',
+	  chars: "\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3"
+	}, {
+	  base: 'l',
+	  chars: "\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747\u026D"
+	}, {
+	  base: 'lj',
+	  chars: "\u01C9"
+	}, {
+	  base: 'm',
+	  chars: "\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F"
+	}, {
+	  base: 'n',
+	  chars: "\u24DD\uFF4E\u01F9\u0144\xF1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5\u043B\u0509"
+	}, {
+	  base: 'nj',
+	  chars: "\u01CC"
+	}, {
+	  base: 'o',
+	  chars: "\u24DE\uFF4F\xF2\xF3\xF4\u1ED3\u1ED1\u1ED7\u1ED5\xF5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\xF6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\xF8\u01FF\uA74B\uA74D\u0275\u0254\u1D11"
+	}, {
+	  base: 'oe',
+	  chars: "\u0153"
+	}, {
+	  base: 'oi',
+	  chars: "\u01A3"
+	}, {
+	  base: 'oo',
+	  chars: "\uA74F"
+	}, {
+	  base: 'ou',
+	  chars: "\u0223"
+	}, {
+	  base: 'p',
+	  chars: "\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755\u03C1"
+	}, {
+	  base: 'q',
+	  chars: "\u24E0\uFF51\u024B\uA757\uA759"
+	}, {
+	  base: 'r',
+	  chars: "\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783"
+	}, {
+	  base: 's',
+	  chars: "\u24E2\uFF53\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B\u0282"
+	}, {
+	  base: 'ss',
+	  chars: "\xDF"
+	}, {
+	  base: 't',
+	  chars: "\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787"
+	}, {
+	  base: 'th',
+	  chars: "\xFE"
+	}, {
+	  base: 'tz',
+	  chars: "\uA729"
+	}, {
+	  base: 'u',
+	  chars: "\u24E4\uFF55\xF9\xFA\xFB\u0169\u1E79\u016B\u1E7B\u016D\xFC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289"
+	}, {
+	  base: 'v',
+	  chars: "\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C"
+	}, {
+	  base: 'vy',
+	  chars: "\uA761"
+	}, {
+	  base: 'w',
+	  chars: "\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73"
+	}, {
+	  base: 'x',
+	  chars: "\u24E7\uFF58\u1E8B\u1E8D"
+	}, {
+	  base: 'y',
+	  chars: "\u24E8\uFF59\u1EF3\xFD\u0177\u1EF9\u0233\u1E8F\xFF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF"
+	}, {
+	  base: 'z',
+	  chars: "\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763"
+	}];
+	var diacriticsMap = {};
+
+	for (var i = 0; i < replacementList.length; i += 1) {
+	  var chars = replacementList[i].chars;
 
-	    return destNode;
+	  for (var j$1 = 0; j$1 < chars.length; j$1 += 1) {
+	    diacriticsMap[chars[j$1]] = replacementList[i].base;
+	  }
 	}
 
-	function extend$1(a, b) {
-	    a.minX = Math.min(a.minX, b.minX);
-	    a.minY = Math.min(a.minY, b.minY);
-	    a.maxX = Math.max(a.maxX, b.maxX);
-	    a.maxY = Math.max(a.maxY, b.maxY);
-	    return a;
+	function removeDiacritics(str) {
+	  return str.replace(/[^\u0000-\u007e]/g, function (c) {
+	    return diacriticsMap[c] || c;
+	  });
 	}
 
-	function compareNodeMinX(a, b) { return a.minX - b.minX; }
-	function compareNodeMinY(a, b) { return a.minY - b.minY; }
+	var replacementList_1 = replacementList;
+	var diacriticsMap_1 = diacriticsMap;
+	var diacritics = {
+	  remove: remove$1,
+	  replacementList: replacementList_1,
+	  diacriticsMap: diacriticsMap_1
+	};
 
-	function bboxArea(a)   { return (a.maxX - a.minX) * (a.maxY - a.minY); }
-	function bboxMargin(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }
+	var isArabic_1 = createCommonjsModule(function (module, exports) {
 
-	function enlargedArea(a, b) {
-	    return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *
-	           (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
-	}
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
+	  var arabicBlocks = [[0x0600, 0x06FF], [0x0750, 0x077F], [0x08A0, 0x08FF], [0xFB50, 0xFDFF], [0xFE70, 0xFEFF], [0x10E60, 0x10E7F], [0x1EC70, 0x1ECBF], [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
+	  ];
 
-	function intersectionArea(a, b) {
-	    var minX = Math.max(a.minX, b.minX);
-	    var minY = Math.max(a.minY, b.minY);
-	    var maxX = Math.min(a.maxX, b.maxX);
-	    var maxY = Math.min(a.maxY, b.maxY);
+	  function isArabic(_char) {
+	    if (_char.length > 1) {
+	      // allow the newer chars?
+	      throw new Error('isArabic works on only one-character strings');
+	    }
 
-	    return Math.max(0, maxX - minX) *
-	           Math.max(0, maxY - minY);
-	}
+	    var code = _char.charCodeAt(0);
 
-	function contains$1(a, b) {
-	    return a.minX <= b.minX &&
-	           a.minY <= b.minY &&
-	           b.maxX <= a.maxX &&
-	           b.maxY <= a.maxY;
-	}
+	    for (var i = 0; i < arabicBlocks.length; i++) {
+	      var block = arabicBlocks[i];
 
-	function intersects(a, b) {
-	    return b.minX <= a.maxX &&
-	           b.minY <= a.maxY &&
-	           b.maxX >= a.minX &&
-	           b.maxY >= a.minY;
-	}
+	      if (code >= block[0] && code <= block[1]) {
+	        return true;
+	      }
+	    }
 
-	function createNode(children) {
-	    return {
-	        children: children,
-	        height: 1,
-	        leaf: true,
-	        minX: Infinity,
-	        minY: Infinity,
-	        maxX: -Infinity,
-	        maxY: -Infinity
-	    };
-	}
+	    return false;
+	  }
 
-	// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
-	// combines selection algorithm with binary divide & conquer approach
+	  exports.isArabic = isArabic;
 
-	function multiSelect(arr, left, right, n, compare) {
-	    var stack = [left, right];
+	  function isMath(_char2) {
+	    if (_char2.length > 2) {
+	      // allow the newer chars?
+	      throw new Error('isMath works on only one-character strings');
+	    }
+
+	    var code = _char2.charCodeAt(0);
 
-	    while (stack.length) {
-	        right = stack.pop();
-	        left = stack.pop();
+	    return code >= 0x660 && code <= 0x66C || code >= 0x6F0 && code <= 0x6F9;
+	  }
 
-	        if (right - left <= n) { continue; }
+	  exports.isMath = isMath;
+	});
 
-	        var mid = left + Math.ceil((right - left) / n / 2) * n;
-	        quickselect(arr, mid, left, right, compare);
+	var unicodeArabic = createCommonjsModule(function (module, exports) {
 
-	        stack.push(left, mid, mid, right);
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
+	  var arabicReference = {
+	    "alef": {
+	      "normal": ["\u0627"],
+	      "madda_above": {
+	        "normal": ["\u0627\u0653", "\u0622"],
+	        "isolated": "\uFE81",
+	        "final": "\uFE82"
+	      },
+	      "hamza_above": {
+	        "normal": ["\u0627\u0654", "\u0623"],
+	        "isolated": "\uFE83",
+	        "final": "\uFE84"
+	      },
+	      "hamza_below": {
+	        "normal": ["\u0627\u0655", "\u0625"],
+	        "isolated": "\uFE87",
+	        "final": "\uFE88"
+	      },
+	      "wasla": {
+	        "normal": "\u0671",
+	        "isolated": "\uFB50",
+	        "final": "\uFB51"
+	      },
+	      "wavy_hamza_above": ["\u0672"],
+	      "wavy_hamza_below": ["\u0627\u065F", "\u0673"],
+	      "high_hamza": ["\u0675", "\u0627\u0674"],
+	      "indic_two_above": ["\u0773"],
+	      "indic_three_above": ["\u0774"],
+	      "fathatan": {
+	        "normal": ["\u0627\u064B"],
+	        "final": "\uFD3C",
+	        "isolated": "\uFD3D"
+	      },
+	      "isolated": "\uFE8D",
+	      "final": "\uFE8E"
+	    },
+	    "beh": {
+	      "normal": ["\u0628"],
+	      "dotless": ["\u066E"],
+	      "three_dots_horizontally_below": ["\u0750"],
+	      "dot_below_three_dots_above": ["\u0751"],
+	      "three_dots_pointing_upwards_below": ["\u0752"],
+	      "three_dots_pointing_upwards_below_two_dots_above": ["\u0753"],
+	      "two_dots_below_dot_above": ["\u0754"],
+	      "inverted_small_v_below": ["\u0755"],
+	      "small_v": ["\u0756"],
+	      "small_v_below": ["\u08A0"],
+	      "hamza_above": ["\u08A1"],
+	      "small_meem_above": ["\u08B6"],
+	      "isolated": "\uFE8F",
+	      "final": "\uFE90",
+	      "initial": "\uFE91",
+	      "medial": "\uFE92"
+	    },
+	    "teh marbuta": {
+	      "normal": ["\u0629"],
+	      "isolated": "\uFE93",
+	      "final": "\uFE94"
+	    },
+	    "teh": {
+	      "normal": ["\u062A"],
+	      "ring": ["\u067C"],
+	      "three_dots_above_downwards": ["\u067D"],
+	      "small_teh_above": ["\u08B8"],
+	      "isolated": "\uFE95",
+	      "final": "\uFE96",
+	      "initial": "\uFE97",
+	      "medial": "\uFE98"
+	    },
+	    "theh": {
+	      "normal": ["\u062B"],
+	      "isolated": "\uFE99",
+	      "final": "\uFE9A",
+	      "initial": "\uFE9B",
+	      "medial": "\uFE9C"
+	    },
+	    "jeem": {
+	      "normal": ["\u062C"],
+	      "two_dots_above": ["\u08A2"],
+	      "isolated": "\uFE9D",
+	      "final": "\uFE9E",
+	      "initial": "\uFE9F",
+	      "medial": "\uFEA0"
+	    },
+	    "hah": {
+	      "normal": ["\u062D"],
+	      "hamza_above": ["\u0681"],
+	      "two_dots_vertical_above": ["\u0682"],
+	      "three_dots_above": ["\u0685"],
+	      "two_dots_above": ["\u0757"],
+	      "three_dots_pointing_upwards_below": ["\u0758"],
+	      "small_tah_below": ["\u076E"],
+	      "small_tah_two_dots": ["\u076F"],
+	      "small_tah_above": ["\u0772"],
+	      "indic_four_below": ["\u077C"],
+	      "isolated": "\uFEA1",
+	      "final": "\uFEA2",
+	      "initial": "\uFEA3",
+	      "medial": "\uFEA4"
+	    },
+	    "khah": {
+	      "normal": ["\u062E"],
+	      "isolated": "\uFEA5",
+	      "final": "\uFEA6",
+	      "initial": "\uFEA7",
+	      "medial": "\uFEA8"
+	    },
+	    "dal": {
+	      "normal": ["\u062F"],
+	      "ring": ["\u0689"],
+	      "dot_below": ["\u068A"],
+	      "dot_below_small_tah": ["\u068B"],
+	      "three_dots_above_downwards": ["\u068F"],
+	      "four_dots_above": ["\u0690"],
+	      "inverted_v": ["\u06EE"],
+	      "two_dots_vertically_below_small_tah": ["\u0759"],
+	      "inverted_small_v_below": ["\u075A"],
+	      "three_dots_below": ["\u08AE"],
+	      "isolated": "\uFEA9",
+	      "final": "\uFEAA"
+	    },
+	    "thal": {
+	      "normal": ["\u0630"],
+	      "isolated": "\uFEAB",
+	      "final": "\uFEAC"
+	    },
+	    "reh": {
+	      "normal": ["\u0631"],
+	      "small_v": ["\u0692"],
+	      "ring": ["\u0693"],
+	      "dot_below": ["\u0694"],
+	      "small_v_below": ["\u0695"],
+	      "dot_below_dot_above": ["\u0696"],
+	      "two_dots_above": ["\u0697"],
+	      "four_dots_above": ["\u0699"],
+	      "inverted_v": ["\u06EF"],
+	      "stroke": ["\u075B"],
+	      "two_dots_vertically_above": ["\u076B"],
+	      "hamza_above": ["\u076C"],
+	      "small_tah_two_dots": ["\u0771"],
+	      "loop": ["\u08AA"],
+	      "small_noon_above": ["\u08B9"],
+	      "isolated": "\uFEAD",
+	      "final": "\uFEAE"
+	    },
+	    "zain": {
+	      "normal": ["\u0632"],
+	      "inverted_v_above": ["\u08B2"],
+	      "isolated": "\uFEAF",
+	      "final": "\uFEB0"
+	    },
+	    "seen": {
+	      "normal": ["\u0633"],
+	      "dot_below_dot_above": ["\u069A"],
+	      "three_dots_below": ["\u069B"],
+	      "three_dots_below_three_dots_above": ["\u069C"],
+	      "four_dots_above": ["\u075C"],
+	      "two_dots_vertically_above": ["\u076D"],
+	      "small_tah_two_dots": ["\u0770"],
+	      "indic_four_above": ["\u077D"],
+	      "inverted_v": ["\u077E"],
+	      "isolated": "\uFEB1",
+	      "final": "\uFEB2",
+	      "initial": "\uFEB3",
+	      "medial": "\uFEB4"
+	    },
+	    "sheen": {
+	      "normal": ["\u0634"],
+	      "dot_below": ["\u06FA"],
+	      "isolated": "\uFEB5",
+	      "final": "\uFEB6",
+	      "initial": "\uFEB7",
+	      "medial": "\uFEB8"
+	    },
+	    "sad": {
+	      "normal": ["\u0635"],
+	      "two_dots_below": ["\u069D"],
+	      "three_dots_above": ["\u069E"],
+	      "three_dots_below": ["\u08AF"],
+	      "isolated": "\uFEB9",
+	      "final": "\uFEBA",
+	      "initial": "\uFEBB",
+	      "medial": "\uFEBC"
+	    },
+	    "dad": {
+	      "normal": ["\u0636"],
+	      "dot_below": ["\u06FB"],
+	      "isolated": "\uFEBD",
+	      "final": "\uFEBE",
+	      "initial": "\uFEBF",
+	      "medial": "\uFEC0"
+	    },
+	    "tah": {
+	      "normal": ["\u0637"],
+	      "three_dots_above": ["\u069F"],
+	      "two_dots_above": ["\u08A3"],
+	      "isolated": "\uFEC1",
+	      "final": "\uFEC2",
+	      "initial": "\uFEC3",
+	      "medial": "\uFEC4"
+	    },
+	    "zah": {
+	      "normal": ["\u0638"],
+	      "isolated": "\uFEC5",
+	      "final": "\uFEC6",
+	      "initial": "\uFEC7",
+	      "medial": "\uFEC8"
+	    },
+	    "ain": {
+	      "normal": ["\u0639"],
+	      "three_dots_above": ["\u06A0"],
+	      "two_dots_above": ["\u075D"],
+	      "three_dots_pointing_downwards_above": ["\u075E"],
+	      "two_dots_vertically_above": ["\u075F"],
+	      "three_dots_below": ["\u08B3"],
+	      "isolated": "\uFEC9",
+	      "final": "\uFECA",
+	      "initial": "\uFECB",
+	      "medial": "\uFECC"
+	    },
+	    "ghain": {
+	      "normal": ["\u063A"],
+	      "dot_below": ["\u06FC"],
+	      "isolated": "\uFECD",
+	      "final": "\uFECE",
+	      "initial": "\uFECF",
+	      "medial": "\uFED0"
+	    },
+	    "feh": {
+	      "normal": ["\u0641"],
+	      "dotless": ["\u06A1"],
+	      "dot_moved_below": ["\u06A2"],
+	      "dot_below": ["\u06A3"],
+	      "three_dots_below": ["\u06A5"],
+	      "two_dots_below": ["\u0760"],
+	      "three_dots_pointing_upwards_below": ["\u0761"],
+	      "dot_below_three_dots_above": ["\u08A4"],
+	      "isolated": "\uFED1",
+	      "final": "\uFED2",
+	      "initial": "\uFED3",
+	      "medial": "\uFED4"
+	    },
+	    "qaf": {
+	      "normal": ["\u0642"],
+	      "dotless": ["\u066F"],
+	      "dot_above": ["\u06A7"],
+	      "three_dots_above": ["\u06A8"],
+	      "dot_below": ["\u08A5"],
+	      "isolated": "\uFED5",
+	      "final": "\uFED6",
+	      "initial": "\uFED7",
+	      "medial": "\uFED8"
+	    },
+	    "kaf": {
+	      "normal": ["\u0643"],
+	      "swash": ["\u06AA"],
+	      "ring": ["\u06AB"],
+	      "dot_above": ["\u06AC"],
+	      "three_dots_below": ["\u06AE"],
+	      "two_dots_above": ["\u077F"],
+	      "dot_below": ["\u08B4"],
+	      "isolated": "\uFED9",
+	      "final": "\uFEDA",
+	      "initial": "\uFEDB",
+	      "medial": "\uFEDC"
+	    },
+	    "lam": {
+	      "normal": ["\u0644"],
+	      "small_v": ["\u06B5"],
+	      "dot_above": ["\u06B6"],
+	      "three_dots_above": ["\u06B7"],
+	      "three_dots_below": ["\u06B8"],
+	      "bar": ["\u076A"],
+	      "double_bar": ["\u08A6"],
+	      "isolated": "\uFEDD",
+	      "final": "\uFEDE",
+	      "initial": "\uFEDF",
+	      "medial": "\uFEE0"
+	    },
+	    "meem": {
+	      "normal": ["\u0645"],
+	      "dot_above": ["\u0765"],
+	      "dot_below": ["\u0766"],
+	      "three_dots_above": ["\u08A7"],
+	      "isolated": "\uFEE1",
+	      "final": "\uFEE2",
+	      "initial": "\uFEE3",
+	      "medial": "\uFEE4"
+	    },
+	    "noon": {
+	      "normal": ["\u0646"],
+	      "dot_below": ["\u06B9"],
+	      "ring": ["\u06BC"],
+	      "three_dots_above": ["\u06BD"],
+	      "two_dots_below": ["\u0767"],
+	      "small_tah": ["\u0768"],
+	      "small_v": ["\u0769"],
+	      "isolated": "\uFEE5",
+	      "final": "\uFEE6",
+	      "initial": "\uFEE7",
+	      "medial": "\uFEE8"
+	    },
+	    "heh": {
+	      "normal": ["\u0647"],
+	      "isolated": "\uFEE9",
+	      "final": "\uFEEA",
+	      "initial": "\uFEEB",
+	      "medial": "\uFEEC"
+	    },
+	    "waw": {
+	      "normal": ["\u0648"],
+	      "hamza_above": {
+	        "normal": ["\u0624", "\u0648\u0654"],
+	        "isolated": "\uFE85",
+	        "final": "\uFE86"
+	      },
+	      "high_hamza": ["\u0676", "\u0648\u0674"],
+	      "ring": ["\u06C4"],
+	      "two_dots_above": ["\u06CA"],
+	      "dot_above": ["\u06CF"],
+	      "indic_two_above": ["\u0778"],
+	      "indic_three_above": ["\u0779"],
+	      "dot_within": ["\u08AB"],
+	      "isolated": "\uFEED",
+	      "final": "\uFEEE"
+	    },
+	    "alef_maksura": {
+	      "normal": ["\u0649"],
+	      "hamza_above": ["\u0626", "\u064A\u0654"],
+	      "initial": "\uFBE8",
+	      "medial": "\uFBE9",
+	      "isolated": "\uFEEF",
+	      "final": "\uFEF0"
+	    },
+	    "yeh": {
+	      "normal": ["\u064A"],
+	      "hamza_above": {
+	        "normal": ["\u0626", "\u0649\u0654"],
+	        "isolated": "\uFE89",
+	        "final": "\uFE8A",
+	        "initial": "\uFE8B",
+	        "medial": "\uFE8C"
+	      },
+	      "two_dots_below_hamza_above": ["\u08A8"],
+	      "high_hamza": ["\u0678", "\u064A\u0674"],
+	      "tail": ["\u06CD"],
+	      "small_v": ["\u06CE"],
+	      "three_dots_below": ["\u06D1"],
+	      "two_dots_below_dot_above": ["\u08A9"],
+	      "two_dots_below_small_noon_above": ["\u08BA"],
+	      "isolated": "\uFEF1",
+	      "final": "\uFEF2",
+	      "initial": "\uFEF3",
+	      "medial": "\uFEF4"
+	    },
+	    "tteh": {
+	      "normal": ["\u0679"],
+	      "isolated": "\uFB66",
+	      "final": "\uFB67",
+	      "initial": "\uFB68",
+	      "medial": "\uFB69"
+	    },
+	    "tteheh": {
+	      "normal": ["\u067A"],
+	      "isolated": "\uFB5E",
+	      "final": "\uFB5F",
+	      "initial": "\uFB60",
+	      "medial": "\uFB61"
+	    },
+	    "beeh": {
+	      "normal": ["\u067B"],
+	      "isolated": "\uFB52",
+	      "final": "\uFB53",
+	      "initial": "\uFB54",
+	      "medial": "\uFB55"
+	    },
+	    "peh": {
+	      "normal": ["\u067E"],
+	      "small_meem_above": ["\u08B7"],
+	      "isolated": "\uFB56",
+	      "final": "\uFB57",
+	      "initial": "\uFB58",
+	      "medial": "\uFB59"
+	    },
+	    "teheh": {
+	      "normal": ["\u067F"],
+	      "isolated": "\uFB62",
+	      "final": "\uFB63",
+	      "initial": "\uFB64",
+	      "medial": "\uFB65"
+	    },
+	    "beheh": {
+	      "normal": ["\u0680"],
+	      "isolated": "\uFB5A",
+	      "final": "\uFB5B",
+	      "initial": "\uFB5C",
+	      "medial": "\uFB5D"
+	    },
+	    "nyeh": {
+	      "normal": ["\u0683"],
+	      "isolated": "\uFB76",
+	      "final": "\uFB77",
+	      "initial": "\uFB78",
+	      "medial": "\uFB79"
+	    },
+	    "dyeh": {
+	      "normal": ["\u0684"],
+	      "isolated": "\uFB72",
+	      "final": "\uFB73",
+	      "initial": "\uFB74",
+	      "medial": "\uFB75"
+	    },
+	    "tcheh": {
+	      "normal": ["\u0686"],
+	      "dot_above": ["\u06BF"],
+	      "isolated": "\uFB7A",
+	      "final": "\uFB7B",
+	      "initial": "\uFB7C",
+	      "medial": "\uFB7D"
+	    },
+	    "tcheheh": {
+	      "normal": ["\u0687"],
+	      "isolated": "\uFB7E",
+	      "final": "\uFB7F",
+	      "initial": "\uFB80",
+	      "medial": "\uFB81"
+	    },
+	    "ddal": {
+	      "normal": ["\u0688"],
+	      "isolated": "\uFB88",
+	      "final": "\uFB89"
+	    },
+	    "dahal": {
+	      "normal": ["\u068C"],
+	      "isolated": "\uFB84",
+	      "final": "\uFB85"
+	    },
+	    "ddahal": {
+	      "normal": ["\u068D"],
+	      "isolated": "\uFB82",
+	      "final": "\uFB83"
+	    },
+	    "dul": {
+	      "normal": ["\u068F", "\u068E"],
+	      "isolated": "\uFB86",
+	      "final": "\uFB87"
+	    },
+	    "rreh": {
+	      "normal": ["\u0691"],
+	      "isolated": "\uFB8C",
+	      "final": "\uFB8D"
+	    },
+	    "jeh": {
+	      "normal": ["\u0698"],
+	      "isolated": "\uFB8A",
+	      "final": "\uFB8B"
+	    },
+	    "veh": {
+	      "normal": ["\u06A4"],
+	      "isolated": "\uFB6A",
+	      "final": "\uFB6B",
+	      "initial": "\uFB6C",
+	      "medial": "\uFB6D"
+	    },
+	    "peheh": {
+	      "normal": ["\u06A6"],
+	      "isolated": "\uFB6E",
+	      "final": "\uFB6F",
+	      "initial": "\uFB70",
+	      "medial": "\uFB71"
+	    },
+	    "keheh": {
+	      "normal": ["\u06A9"],
+	      "dot_above": ["\u0762"],
+	      "three_dots_above": ["\u0763"],
+	      "three_dots_pointing_upwards_below": ["\u0764"],
+	      "isolated": "\uFB8E",
+	      "final": "\uFB8F",
+	      "initial": "\uFB90",
+	      "medial": "\uFB91"
+	    },
+	    "ng": {
+	      "normal": ["\u06AD"],
+	      "isolated": "\uFBD3",
+	      "final": "\uFBD4",
+	      "initial": "\uFBD5",
+	      "medial": "\uFBD6"
+	    },
+	    "gaf": {
+	      "normal": ["\u06AF"],
+	      "ring": ["\u06B0"],
+	      "two_dots_below": ["\u06B2"],
+	      "three_dots_above": ["\u06B4"],
+	      "inverted_stroke": ["\u08B0"],
+	      "isolated": "\uFB92",
+	      "final": "\uFB93",
+	      "initial": "\uFB94",
+	      "medial": "\uFB95"
+	    },
+	    "ngoeh": {
+	      "normal": ["\u06B1"],
+	      "isolated": "\uFB9A",
+	      "final": "\uFB9B",
+	      "initial": "\uFB9C",
+	      "medial": "\uFB9D"
+	    },
+	    "gueh": {
+	      "normal": ["\u06B3"],
+	      "isolated": "\uFB96",
+	      "final": "\uFB97",
+	      "initial": "\uFB98",
+	      "medial": "\uFB99"
+	    },
+	    "noon ghunna": {
+	      "normal": ["\u06BA"],
+	      "isolated": "\uFB9E",
+	      "final": "\uFB9F"
+	    },
+	    "rnoon": {
+	      "normal": ["\u06BB"],
+	      "isolated": "\uFBA0",
+	      "final": "\uFBA1",
+	      "initial": "\uFBA2",
+	      "medial": "\uFBA3"
+	    },
+	    "heh doachashmee": {
+	      "normal": ["\u06BE"],
+	      "isolated": "\uFBAA",
+	      "final": "\uFBAB",
+	      "initial": "\uFBAC",
+	      "medial": "\uFBAD"
+	    },
+	    "heh goal": {
+	      "normal": ["\u06C1"],
+	      "hamza_above": ["\u06C1\u0654", "\u06C2"],
+	      "isolated": "\uFBA6",
+	      "final": "\uFBA7",
+	      "initial": "\uFBA8",
+	      "medial": "\uFBA9"
+	    },
+	    "teh marbuta goal": {
+	      "normal": ["\u06C3"]
+	    },
+	    "kirghiz oe": {
+	      "normal": ["\u06C5"],
+	      "isolated": "\uFBE0",
+	      "final": "\uFBE1"
+	    },
+	    "oe": {
+	      "normal": ["\u06C6"],
+	      "isolated": "\uFBD9",
+	      "final": "\uFBDA"
+	    },
+	    "u": {
+	      "normal": ["\u06C7"],
+	      "hamza_above": {
+	        "normal": ["\u0677", "\u06C7\u0674"],
+	        "isolated": "\uFBDD"
+	      },
+	      "isolated": "\uFBD7",
+	      "final": "\uFBD8"
+	    },
+	    "yu": {
+	      "normal": ["\u06C8"],
+	      "isolated": "\uFBDB",
+	      "final": "\uFBDC"
+	    },
+	    "kirghiz yu": {
+	      "normal": ["\u06C9"],
+	      "isolated": "\uFBE2",
+	      "final": "\uFBE3"
+	    },
+	    "ve": {
+	      "normal": ["\u06CB"],
+	      "isolated": "\uFBDE",
+	      "final": "\uFBDF"
+	    },
+	    "farsi yeh": {
+	      "normal": ["\u06CC"],
+	      "indic_two_above": ["\u0775"],
+	      "indic_three_above": ["\u0776"],
+	      "indic_four_above": ["\u0777"],
+	      "isolated": "\uFBFC",
+	      "final": "\uFBFD",
+	      "initial": "\uFBFE",
+	      "medial": "\uFBFF"
+	    },
+	    "e": {
+	      "normal": ["\u06D0"],
+	      "isolated": "\uFBE4",
+	      "final": "\uFBE5",
+	      "initial": "\uFBE6",
+	      "medial": "\uFBE7"
+	    },
+	    "yeh barree": {
+	      "normal": ["\u06D2"],
+	      "hamza_above": {
+	        "normal": ["\u06D2\u0654", "\u06D3"],
+	        "isolated": "\uFBB0",
+	        "final": "\uFBB1"
+	      },
+	      "indic_two_above": ["\u077A"],
+	      "indic_three_above": ["\u077B"],
+	      "isolated": "\uFBAE",
+	      "final": "\uFBAF"
+	    },
+	    "ae": {
+	      "normal": ["\u06D5"],
+	      "isolated": "\u06D5",
+	      "final": "\uFEEA",
+	      "yeh_above": {
+	        "normal": ["\u06C0", "\u06D5\u0654"],
+	        "isolated": "\uFBA4",
+	        "final": "\uFBA5"
+	      }
+	    },
+	    "rohingya yeh": {
+	      "normal": ["\u08AC"]
+	    },
+	    "low alef": {
+	      "normal": ["\u08AD"]
+	    },
+	    "straight waw": {
+	      "normal": ["\u08B1"]
+	    },
+	    "african feh": {
+	      "normal": ["\u08BB"]
+	    },
+	    "african qaf": {
+	      "normal": ["\u08BC"]
+	    },
+	    "african noon": {
+	      "normal": ["\u08BD"]
 	    }
-	}
-
-	var tiler = utilTiler();
-	var dispatch$1 = dispatch('loaded');
-	var _tileZoom = 14;
-	var _krUrlRoot = 'https://www.keepright.at';
-	var _krData = { errorTypes: {}, localizeStrings: {} };
-
-	// This gets reassigned if reset
-	var _cache;
+	  };
+	  exports["default"] = arabicReference;
+	});
 
-	var _krRuleset = [
-	  // no 20 - multiple node on same spot - these are mostly boundaries overlapping roads
-	  30, 40, 50, 60, 70, 90, 100, 110, 120, 130, 150, 160, 170, 180,
-	  190, 191, 192, 193, 194, 195, 196, 197, 198,
-	  200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 220,
-	  230, 231, 232, 270, 280, 281, 282, 283, 284, 285,
-	  290, 291, 292, 293, 294, 295, 296, 297, 298, 300, 310, 311, 312, 313,
-	  320, 350, 360, 370, 380, 390, 400, 401, 402, 410, 411, 412, 413
-	];
+	var unicodeLigatures = createCommonjsModule(function (module, exports) {
 
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
+	  var ligatureReference = {
+	    "\u0626\u0627": {
+	      "isolated": "\uFBEA",
+	      "final": "\uFBEB"
+	    },
+	    "\u0626\u06D5": {
+	      "isolated": "\uFBEC",
+	      "final": "\uFBED"
+	    },
+	    "\u0626\u0648": {
+	      "isolated": "\uFBEE",
+	      "final": "\uFBEF"
+	    },
+	    "\u0626\u06C7": {
+	      "isolated": "\uFBF0",
+	      "final": "\uFBF1"
+	    },
+	    "\u0626\u06C6": {
+	      "isolated": "\uFBF2",
+	      "final": "\uFBF3"
+	    },
+	    "\u0626\u06C8": {
+	      "isolated": "\uFBF4",
+	      "final": "\uFBF5"
+	    },
+	    "\u0626\u06D0": {
+	      "isolated": "\uFBF6",
+	      "final": "\uFBF7",
+	      "initial": "\uFBF8"
+	    },
+	    "\u0626\u0649": {
+	      "uighur_kirghiz": {
+	        "isolated": "\uFBF9",
+	        "final": "\uFBFA",
+	        "initial": "\uFBFB"
+	      },
+	      "isolated": "\uFC03",
+	      "final": "\uFC68"
+	    },
+	    "\u0626\u062C": {
+	      "isolated": "\uFC00",
+	      "initial": "\uFC97"
+	    },
+	    "\u0626\u062D": {
+	      "isolated": "\uFC01",
+	      "initial": "\uFC98"
+	    },
+	    "\u0626\u0645": {
+	      "isolated": "\uFC02",
+	      "final": "\uFC66",
+	      "initial": "\uFC9A",
+	      "medial": "\uFCDF"
+	    },
+	    "\u0626\u064A": {
+	      "isolated": "\uFC04",
+	      "final": "\uFC69"
+	    },
+	    "\u0628\u062C": {
+	      "isolated": "\uFC05",
+	      "initial": "\uFC9C"
+	    },
+	    "\u0628\u062D": {
+	      "isolated": "\uFC06",
+	      "initial": "\uFC9D"
+	    },
+	    "\u0628\u062E": {
+	      "isolated": "\uFC07",
+	      "initial": "\uFC9E"
+	    },
+	    "\u0628\u0645": {
+	      "isolated": "\uFC08",
+	      "final": "\uFC6C",
+	      "initial": "\uFC9F",
+	      "medial": "\uFCE1"
+	    },
+	    "\u0628\u0649": {
+	      "isolated": "\uFC09",
+	      "final": "\uFC6E"
+	    },
+	    "\u0628\u064A": {
+	      "isolated": "\uFC0A",
+	      "final": "\uFC6F"
+	    },
+	    "\u062A\u062C": {
+	      "isolated": "\uFC0B",
+	      "initial": "\uFCA1"
+	    },
+	    "\u062A\u062D": {
+	      "isolated": "\uFC0C",
+	      "initial": "\uFCA2"
+	    },
+	    "\u062A\u062E": {
+	      "isolated": "\uFC0D",
+	      "initial": "\uFCA3"
+	    },
+	    "\u062A\u0645": {
+	      "isolated": "\uFC0E",
+	      "final": "\uFC72",
+	      "initial": "\uFCA4",
+	      "medial": "\uFCE3"
+	    },
+	    "\u062A\u0649": {
+	      "isolated": "\uFC0F",
+	      "final": "\uFC74"
+	    },
+	    "\u062A\u064A": {
+	      "isolated": "\uFC10",
+	      "final": "\uFC75"
+	    },
+	    "\u062B\u062C": {
+	      "isolated": "\uFC11"
+	    },
+	    "\u062B\u0645": {
+	      "isolated": "\uFC12",
+	      "final": "\uFC78",
+	      "initial": "\uFCA6",
+	      "medial": "\uFCE5"
+	    },
+	    "\u062B\u0649": {
+	      "isolated": "\uFC13",
+	      "final": "\uFC7A"
+	    },
+	    "\u062B\u0648": {
+	      "isolated": "\uFC14"
+	    },
+	    "\u062C\u062D": {
+	      "isolated": "\uFC15",
+	      "initial": "\uFCA7"
+	    },
+	    "\u062C\u0645": {
+	      "isolated": "\uFC16",
+	      "initial": "\uFCA8"
+	    },
+	    "\u062D\u062C": {
+	      "isolated": "\uFC17",
+	      "initial": "\uFCA9"
+	    },
+	    "\u062D\u0645": {
+	      "isolated": "\uFC18",
+	      "initial": "\uFCAA"
+	    },
+	    "\u062E\u062C": {
+	      "isolated": "\uFC19",
+	      "initial": "\uFCAB"
+	    },
+	    "\u062E\u062D": {
+	      "isolated": "\uFC1A"
+	    },
+	    "\u062E\u0645": {
+	      "isolated": "\uFC1B",
+	      "initial": "\uFCAC"
+	    },
+	    "\u0633\u062C": {
+	      "isolated": "\uFC1C",
+	      "initial": "\uFCAD",
+	      "medial": "\uFD34"
+	    },
+	    "\u0633\u062D": {
+	      "isolated": "\uFC1D",
+	      "initial": "\uFCAE",
+	      "medial": "\uFD35"
+	    },
+	    "\u0633\u062E": {
+	      "isolated": "\uFC1E",
+	      "initial": "\uFCAF",
+	      "medial": "\uFD36"
+	    },
+	    "\u0633\u0645": {
+	      "isolated": "\uFC1F",
+	      "initial": "\uFCB0",
+	      "medial": "\uFCE7"
+	    },
+	    "\u0635\u062D": {
+	      "isolated": "\uFC20",
+	      "initial": "\uFCB1"
+	    },
+	    "\u0635\u0645": {
+	      "isolated": "\uFC21",
+	      "initial": "\uFCB3"
+	    },
+	    "\u0636\u062C": {
+	      "isolated": "\uFC22",
+	      "initial": "\uFCB4"
+	    },
+	    "\u0636\u062D": {
+	      "isolated": "\uFC23",
+	      "initial": "\uFCB5"
+	    },
+	    "\u0636\u062E": {
+	      "isolated": "\uFC24",
+	      "initial": "\uFCB6"
+	    },
+	    "\u0636\u0645": {
+	      "isolated": "\uFC25",
+	      "initial": "\uFCB7"
+	    },
+	    "\u0637\u062D": {
+	      "isolated": "\uFC26",
+	      "initial": "\uFCB8"
+	    },
+	    "\u0637\u0645": {
+	      "isolated": "\uFC27",
+	      "initial": "\uFD33",
+	      "medial": "\uFD3A"
+	    },
+	    "\u0638\u0645": {
+	      "isolated": "\uFC28",
+	      "initial": "\uFCB9",
+	      "medial": "\uFD3B"
+	    },
+	    "\u0639\u062C": {
+	      "isolated": "\uFC29",
+	      "initial": "\uFCBA"
+	    },
+	    "\u0639\u0645": {
+	      "isolated": "\uFC2A",
+	      "initial": "\uFCBB"
+	    },
+	    "\u063A\u062C": {
+	      "isolated": "\uFC2B",
+	      "initial": "\uFCBC"
+	    },
+	    "\u063A\u0645": {
+	      "isolated": "\uFC2C",
+	      "initial": "\uFCBD"
+	    },
+	    "\u0641\u062C": {
+	      "isolated": "\uFC2D",
+	      "initial": "\uFCBE"
+	    },
+	    "\u0641\u062D": {
+	      "isolated": "\uFC2E",
+	      "initial": "\uFCBF"
+	    },
+	    "\u0641\u062E": {
+	      "isolated": "\uFC2F",
+	      "initial": "\uFCC0"
+	    },
+	    "\u0641\u0645": {
+	      "isolated": "\uFC30",
+	      "initial": "\uFCC1"
+	    },
+	    "\u0641\u0649": {
+	      "isolated": "\uFC31",
+	      "final": "\uFC7C"
+	    },
+	    "\u0641\u064A": {
+	      "isolated": "\uFC32",
+	      "final": "\uFC7D"
+	    },
+	    "\u0642\u062D": {
+	      "isolated": "\uFC33",
+	      "initial": "\uFCC2"
+	    },
+	    "\u0642\u0645": {
+	      "isolated": "\uFC34",
+	      "initial": "\uFCC3"
+	    },
+	    "\u0642\u0649": {
+	      "isolated": "\uFC35",
+	      "final": "\uFC7E"
+	    },
+	    "\u0642\u064A": {
+	      "isolated": "\uFC36",
+	      "final": "\uFC7F"
+	    },
+	    "\u0643\u0627": {
+	      "isolated": "\uFC37",
+	      "final": "\uFC80"
+	    },
+	    "\u0643\u062C": {
+	      "isolated": "\uFC38",
+	      "initial": "\uFCC4"
+	    },
+	    "\u0643\u062D": {
+	      "isolated": "\uFC39",
+	      "initial": "\uFCC5"
+	    },
+	    "\u0643\u062E": {
+	      "isolated": "\uFC3A",
+	      "initial": "\uFCC6"
+	    },
+	    "\u0643\u0644": {
+	      "isolated": "\uFC3B",
+	      "final": "\uFC81",
+	      "initial": "\uFCC7",
+	      "medial": "\uFCEB"
+	    },
+	    "\u0643\u0645": {
+	      "isolated": "\uFC3C",
+	      "final": "\uFC82",
+	      "initial": "\uFCC8",
+	      "medial": "\uFCEC"
+	    },
+	    "\u0643\u0649": {
+	      "isolated": "\uFC3D",
+	      "final": "\uFC83"
+	    },
+	    "\u0643\u064A": {
+	      "isolated": "\uFC3E",
+	      "final": "\uFC84"
+	    },
+	    "\u0644\u062C": {
+	      "isolated": "\uFC3F",
+	      "initial": "\uFCC9"
+	    },
+	    "\u0644\u062D": {
+	      "isolated": "\uFC40",
+	      "initial": "\uFCCA"
+	    },
+	    "\u0644\u062E": {
+	      "isolated": "\uFC41",
+	      "initial": "\uFCCB"
+	    },
+	    "\u0644\u0645": {
+	      "isolated": "\uFC42",
+	      "final": "\uFC85",
+	      "initial": "\uFCCC",
+	      "medial": "\uFCED"
+	    },
+	    "\u0644\u0649": {
+	      "isolated": "\uFC43",
+	      "final": "\uFC86"
+	    },
+	    "\u0644\u064A": {
+	      "isolated": "\uFC44",
+	      "final": "\uFC87"
+	    },
+	    "\u0645\u062C": {
+	      "isolated": "\uFC45",
+	      "initial": "\uFCCE"
+	    },
+	    "\u0645\u062D": {
+	      "isolated": "\uFC46",
+	      "initial": "\uFCCF"
+	    },
+	    "\u0645\u062E": {
+	      "isolated": "\uFC47",
+	      "initial": "\uFCD0"
+	    },
+	    "\u0645\u0645": {
+	      "isolated": "\uFC48",
+	      "final": "\uFC89",
+	      "initial": "\uFCD1"
+	    },
+	    "\u0645\u0649": {
+	      "isolated": "\uFC49"
+	    },
+	    "\u0645\u064A": {
+	      "isolated": "\uFC4A"
+	    },
+	    "\u0646\u062C": {
+	      "isolated": "\uFC4B",
+	      "initial": "\uFCD2"
+	    },
+	    "\u0646\u062D": {
+	      "isolated": "\uFC4C",
+	      "initial": "\uFCD3"
+	    },
+	    "\u0646\u062E": {
+	      "isolated": "\uFC4D",
+	      "initial": "\uFCD4"
+	    },
+	    "\u0646\u0645": {
+	      "isolated": "\uFC4E",
+	      "final": "\uFC8C",
+	      "initial": "\uFCD5",
+	      "medial": "\uFCEE"
+	    },
+	    "\u0646\u0649": {
+	      "isolated": "\uFC4F",
+	      "final": "\uFC8E"
+	    },
+	    "\u0646\u064A": {
+	      "isolated": "\uFC50",
+	      "final": "\uFC8F"
+	    },
+	    "\u0647\u062C": {
+	      "isolated": "\uFC51",
+	      "initial": "\uFCD7"
+	    },
+	    "\u0647\u0645": {
+	      "isolated": "\uFC52",
+	      "initial": "\uFCD8"
+	    },
+	    "\u0647\u0649": {
+	      "isolated": "\uFC53"
+	    },
+	    "\u0647\u064A": {
+	      "isolated": "\uFC54"
+	    },
+	    "\u064A\u062C": {
+	      "isolated": "\uFC55",
+	      "initial": "\uFCDA"
+	    },
+	    "\u064A\u062D": {
+	      "isolated": "\uFC56",
+	      "initial": "\uFCDB"
+	    },
+	    "\u064A\u062E": {
+	      "isolated": "\uFC57",
+	      "initial": "\uFCDC"
+	    },
+	    "\u064A\u0645": {
+	      "isolated": "\uFC58",
+	      "final": "\uFC93",
+	      "initial": "\uFCDD",
+	      "medial": "\uFCF0"
+	    },
+	    "\u064A\u0649": {
+	      "isolated": "\uFC59",
+	      "final": "\uFC95"
+	    },
+	    "\u064A\u064A": {
+	      "isolated": "\uFC5A",
+	      "final": "\uFC96"
+	    },
+	    "\u0630\u0670": {
+	      "isolated": "\uFC5B"
+	    },
+	    "\u0631\u0670": {
+	      "isolated": "\uFC5C"
+	    },
+	    "\u0649\u0670": {
+	      "isolated": "\uFC5D",
+	      "final": "\uFC90"
+	    },
+	    "\u064C\u0651": {
+	      "isolated": "\uFC5E"
+	    },
+	    "\u064D\u0651": {
+	      "isolated": "\uFC5F"
+	    },
+	    "\u064E\u0651": {
+	      "isolated": "\uFC60"
+	    },
+	    "\u064F\u0651": {
+	      "isolated": "\uFC61"
+	    },
+	    "\u0650\u0651": {
+	      "isolated": "\uFC62"
+	    },
+	    "\u0651\u0670": {
+	      "isolated": "\uFC63"
+	    },
+	    "\u0626\u0631": {
+	      "final": "\uFC64"
+	    },
+	    "\u0626\u0632": {
+	      "final": "\uFC65"
+	    },
+	    "\u0626\u0646": {
+	      "final": "\uFC67"
+	    },
+	    "\u0628\u0631": {
+	      "final": "\uFC6A"
+	    },
+	    "\u0628\u0632": {
+	      "final": "\uFC6B"
+	    },
+	    "\u0628\u0646": {
+	      "final": "\uFC6D"
+	    },
+	    "\u062A\u0631": {
+	      "final": "\uFC70"
+	    },
+	    "\u062A\u0632": {
+	      "final": "\uFC71"
+	    },
+	    "\u062A\u0646": {
+	      "final": "\uFC73"
+	    },
+	    "\u062B\u0631": {
+	      "final": "\uFC76"
+	    },
+	    "\u062B\u0632": {
+	      "final": "\uFC77"
+	    },
+	    "\u062B\u0646": {
+	      "final": "\uFC79"
+	    },
+	    "\u062B\u064A": {
+	      "final": "\uFC7B"
+	    },
+	    "\u0645\u0627": {
+	      "final": "\uFC88"
+	    },
+	    "\u0646\u0631": {
+	      "final": "\uFC8A"
+	    },
+	    "\u0646\u0632": {
+	      "final": "\uFC8B"
+	    },
+	    "\u0646\u0646": {
+	      "final": "\uFC8D"
+	    },
+	    "\u064A\u0631": {
+	      "final": "\uFC91"
+	    },
+	    "\u064A\u0632": {
+	      "final": "\uFC92"
+	    },
+	    "\u064A\u0646": {
+	      "final": "\uFC94"
+	    },
+	    "\u0626\u062E": {
+	      "initial": "\uFC99"
+	    },
+	    "\u0626\u0647": {
+	      "initial": "\uFC9B",
+	      "medial": "\uFCE0"
+	    },
+	    "\u0628\u0647": {
+	      "initial": "\uFCA0",
+	      "medial": "\uFCE2"
+	    },
+	    "\u062A\u0647": {
+	      "initial": "\uFCA5",
+	      "medial": "\uFCE4"
+	    },
+	    "\u0635\u062E": {
+	      "initial": "\uFCB2"
+	    },
+	    "\u0644\u0647": {
+	      "initial": "\uFCCD"
+	    },
+	    "\u0646\u0647": {
+	      "initial": "\uFCD6",
+	      "medial": "\uFCEF"
+	    },
+	    "\u0647\u0670": {
+	      "initial": "\uFCD9"
+	    },
+	    "\u064A\u0647": {
+	      "initial": "\uFCDE",
+	      "medial": "\uFCF1"
+	    },
+	    "\u062B\u0647": {
+	      "medial": "\uFCE6"
+	    },
+	    "\u0633\u0647": {
+	      "medial": "\uFCE8",
+	      "initial": "\uFD31"
+	    },
+	    "\u0634\u0645": {
+	      "medial": "\uFCE9",
+	      "isolated": "\uFD0C",
+	      "final": "\uFD28",
+	      "initial": "\uFD30"
+	    },
+	    "\u0634\u0647": {
+	      "medial": "\uFCEA",
+	      "initial": "\uFD32"
+	    },
+	    "\u0640\u064E\u0651": {
+	      "medial": "\uFCF2"
+	    },
+	    "\u0640\u064F\u0651": {
+	      "medial": "\uFCF3"
+	    },
+	    "\u0640\u0650\u0651": {
+	      "medial": "\uFCF4"
+	    },
+	    "\u0637\u0649": {
+	      "isolated": "\uFCF5",
+	      "final": "\uFD11"
+	    },
+	    "\u0637\u064A": {
+	      "isolated": "\uFCF6",
+	      "final": "\uFD12"
+	    },
+	    "\u0639\u0649": {
+	      "isolated": "\uFCF7",
+	      "final": "\uFD13"
+	    },
+	    "\u0639\u064A": {
+	      "isolated": "\uFCF8",
+	      "final": "\uFD14"
+	    },
+	    "\u063A\u0649": {
+	      "isolated": "\uFCF9",
+	      "final": "\uFD15"
+	    },
+	    "\u063A\u064A": {
+	      "isolated": "\uFCFA",
+	      "final": "\uFD16"
+	    },
+	    "\u0633\u0649": {
+	      "isolated": "\uFCFB"
+	    },
+	    "\u0633\u064A": {
+	      "isolated": "\uFCFC",
+	      "final": "\uFD18"
+	    },
+	    "\u0634\u0649": {
+	      "isolated": "\uFCFD",
+	      "final": "\uFD19"
+	    },
+	    "\u0634\u064A": {
+	      "isolated": "\uFCFE",
+	      "final": "\uFD1A"
+	    },
+	    "\u062D\u0649": {
+	      "isolated": "\uFCFF",
+	      "final": "\uFD1B"
+	    },
+	    "\u062D\u064A": {
+	      "isolated": "\uFD00",
+	      "final": "\uFD1C"
+	    },
+	    "\u062C\u0649": {
+	      "isolated": "\uFD01",
+	      "final": "\uFD1D"
+	    },
+	    "\u062C\u064A": {
+	      "isolated": "\uFD02",
+	      "final": "\uFD1E"
+	    },
+	    "\u062E\u0649": {
+	      "isolated": "\uFD03",
+	      "final": "\uFD1F"
+	    },
+	    "\u062E\u064A": {
+	      "isolated": "\uFD04",
+	      "final": "\uFD20"
+	    },
+	    "\u0635\u0649": {
+	      "isolated": "\uFD05",
+	      "final": "\uFD21"
+	    },
+	    "\u0635\u064A": {
+	      "isolated": "\uFD06",
+	      "final": "\uFD22"
+	    },
+	    "\u0636\u0649": {
+	      "isolated": "\uFD07",
+	      "final": "\uFD23"
+	    },
+	    "\u0636\u064A": {
+	      "isolated": "\uFD08",
+	      "final": "\uFD24"
+	    },
+	    "\u0634\u062C": {
+	      "isolated": "\uFD09",
+	      "final": "\uFD25",
+	      "initial": "\uFD2D",
+	      "medial": "\uFD37"
+	    },
+	    "\u0634\u062D": {
+	      "isolated": "\uFD0A",
+	      "final": "\uFD26",
+	      "initial": "\uFD2E",
+	      "medial": "\uFD38"
+	    },
+	    "\u0634\u062E": {
+	      "isolated": "\uFD0B",
+	      "final": "\uFD27",
+	      "initial": "\uFD2F",
+	      "medial": "\uFD39"
+	    },
+	    "\u0634\u0631": {
+	      "isolated": "\uFD0D",
+	      "final": "\uFD29"
+	    },
+	    "\u0633\u0631": {
+	      "isolated": "\uFD0E",
+	      "final": "\uFD2A"
+	    },
+	    "\u0635\u0631": {
+	      "isolated": "\uFD0F",
+	      "final": "\uFD2B"
+	    },
+	    "\u0636\u0631": {
+	      "isolated": "\uFD10",
+	      "final": "\uFD2C"
+	    },
+	    "\u0633\u0639": {
+	      "final": "\uFD17"
+	    },
+	    "\u062A\u062C\u0645": {
+	      "initial": "\uFD50"
+	    },
+	    "\u062A\u062D\u062C": {
+	      "final": "\uFD51",
+	      "initial": "\uFD52"
+	    },
+	    "\u062A\u062D\u0645": {
+	      "initial": "\uFD53"
+	    },
+	    "\u062A\u062E\u0645": {
+	      "initial": "\uFD54"
+	    },
+	    "\u062A\u0645\u062C": {
+	      "initial": "\uFD55"
+	    },
+	    "\u062A\u0645\u062D": {
+	      "initial": "\uFD56"
+	    },
+	    "\u062A\u0645\u062E": {
+	      "initial": "\uFD57"
+	    },
+	    "\u062C\u0645\u062D": {
+	      "final": "\uFD58",
+	      "initial": "\uFD59"
+	    },
+	    "\u062D\u0645\u064A": {
+	      "final": "\uFD5A"
+	    },
+	    "\u062D\u0645\u0649": {
+	      "final": "\uFD5B"
+	    },
+	    "\u0633\u062D\u062C": {
+	      "initial": "\uFD5C"
+	    },
+	    "\u0633\u062C\u062D": {
+	      "initial": "\uFD5D"
+	    },
+	    "\u0633\u062C\u0649": {
+	      "final": "\uFD5E"
+	    },
+	    "\u0633\u0645\u062D": {
+	      "final": "\uFD5F",
+	      "initial": "\uFD60"
+	    },
+	    "\u0633\u0645\u062C": {
+	      "initial": "\uFD61"
+	    },
+	    "\u0633\u0645\u0645": {
+	      "final": "\uFD62",
+	      "initial": "\uFD63"
+	    },
+	    "\u0635\u062D\u062D": {
+	      "final": "\uFD64",
+	      "initial": "\uFD65"
+	    },
+	    "\u0635\u0645\u0645": {
+	      "final": "\uFD66",
+	      "initial": "\uFDC5"
+	    },
+	    "\u0634\u062D\u0645": {
+	      "final": "\uFD67",
+	      "initial": "\uFD68"
+	    },
+	    "\u0634\u062C\u064A": {
+	      "final": "\uFD69"
+	    },
+	    "\u0634\u0645\u062E": {
+	      "final": "\uFD6A",
+	      "initial": "\uFD6B"
+	    },
+	    "\u0634\u0645\u0645": {
+	      "final": "\uFD6C",
+	      "initial": "\uFD6D"
+	    },
+	    "\u0636\u062D\u0649": {
+	      "final": "\uFD6E"
+	    },
+	    "\u0636\u062E\u0645": {
+	      "final": "\uFD6F",
+	      "initial": "\uFD70"
+	    },
+	    "\u0636\u0645\u062D": {
+	      "final": "\uFD71"
+	    },
+	    "\u0637\u0645\u062D": {
+	      "initial": "\uFD72"
+	    },
+	    "\u0637\u0645\u0645": {
+	      "initial": "\uFD73"
+	    },
+	    "\u0637\u0645\u064A": {
+	      "final": "\uFD74"
+	    },
+	    "\u0639\u062C\u0645": {
+	      "final": "\uFD75",
+	      "initial": "\uFDC4"
+	    },
+	    "\u0639\u0645\u0645": {
+	      "final": "\uFD76",
+	      "initial": "\uFD77"
+	    },
+	    "\u0639\u0645\u0649": {
+	      "final": "\uFD78"
+	    },
+	    "\u063A\u0645\u0645": {
+	      "final": "\uFD79"
+	    },
+	    "\u063A\u0645\u064A": {
+	      "final": "\uFD7A"
+	    },
+	    "\u063A\u0645\u0649": {
+	      "final": "\uFD7B"
+	    },
+	    "\u0641\u062E\u0645": {
+	      "final": "\uFD7C",
+	      "initial": "\uFD7D"
+	    },
+	    "\u0642\u0645\u062D": {
+	      "final": "\uFD7E",
+	      "initial": "\uFDB4"
+	    },
+	    "\u0642\u0645\u0645": {
+	      "final": "\uFD7F"
+	    },
+	    "\u0644\u062D\u0645": {
+	      "final": "\uFD80",
+	      "initial": "\uFDB5"
+	    },
+	    "\u0644\u062D\u064A": {
+	      "final": "\uFD81"
+	    },
+	    "\u0644\u062D\u0649": {
+	      "final": "\uFD82"
+	    },
+	    "\u0644\u062C\u062C": {
+	      "initial": "\uFD83",
+	      "final": "\uFD84"
+	    },
+	    "\u0644\u062E\u0645": {
+	      "final": "\uFD85",
+	      "initial": "\uFD86"
+	    },
+	    "\u0644\u0645\u062D": {
+	      "final": "\uFD87",
+	      "initial": "\uFD88"
+	    },
+	    "\u0645\u062D\u062C": {
+	      "initial": "\uFD89"
+	    },
+	    "\u0645\u062D\u0645": {
+	      "initial": "\uFD8A"
+	    },
+	    "\u0645\u062D\u064A": {
+	      "final": "\uFD8B"
+	    },
+	    "\u0645\u062C\u062D": {
+	      "initial": "\uFD8C"
+	    },
+	    "\u0645\u062C\u0645": {
+	      "initial": "\uFD8D"
+	    },
+	    "\u0645\u062E\u062C": {
+	      "initial": "\uFD8E"
+	    },
+	    "\u0645\u062E\u0645": {
+	      "initial": "\uFD8F"
+	    },
+	    "\u0645\u062C\u062E": {
+	      "initial": "\uFD92"
+	    },
+	    "\u0647\u0645\u062C": {
+	      "initial": "\uFD93"
+	    },
+	    "\u0647\u0645\u0645": {
+	      "initial": "\uFD94"
+	    },
+	    "\u0646\u062D\u0645": {
+	      "initial": "\uFD95"
+	    },
+	    "\u0646\u062D\u0649": {
+	      "final": "\uFD96"
+	    },
+	    "\u0646\u062C\u0645": {
+	      "final": "\uFD97",
+	      "initial": "\uFD98"
+	    },
+	    "\u0646\u062C\u0649": {
+	      "final": "\uFD99"
+	    },
+	    "\u0646\u0645\u064A": {
+	      "final": "\uFD9A"
+	    },
+	    "\u0646\u0645\u0649": {
+	      "final": "\uFD9B"
+	    },
+	    "\u064A\u0645\u0645": {
+	      "final": "\uFD9C",
+	      "initial": "\uFD9D"
+	    },
+	    "\u0628\u062E\u064A": {
+	      "final": "\uFD9E"
+	    },
+	    "\u062A\u062C\u064A": {
+	      "final": "\uFD9F"
+	    },
+	    "\u062A\u062C\u0649": {
+	      "final": "\uFDA0"
+	    },
+	    "\u062A\u062E\u064A": {
+	      "final": "\uFDA1"
+	    },
+	    "\u062A\u062E\u0649": {
+	      "final": "\uFDA2"
+	    },
+	    "\u062A\u0645\u064A": {
+	      "final": "\uFDA3"
+	    },
+	    "\u062A\u0645\u0649": {
+	      "final": "\uFDA4"
+	    },
+	    "\u062C\u0645\u064A": {
+	      "final": "\uFDA5"
+	    },
+	    "\u062C\u062D\u0649": {
+	      "final": "\uFDA6"
+	    },
+	    "\u062C\u0645\u0649": {
+	      "final": "\uFDA7"
+	    },
+	    "\u0633\u062E\u0649": {
+	      "final": "\uFDA8"
+	    },
+	    "\u0635\u062D\u064A": {
+	      "final": "\uFDA9"
+	    },
+	    "\u0634\u062D\u064A": {
+	      "final": "\uFDAA"
+	    },
+	    "\u0636\u062D\u064A": {
+	      "final": "\uFDAB"
+	    },
+	    "\u0644\u062C\u064A": {
+	      "final": "\uFDAC"
+	    },
+	    "\u0644\u0645\u064A": {
+	      "final": "\uFDAD"
+	    },
+	    "\u064A\u062D\u064A": {
+	      "final": "\uFDAE"
+	    },
+	    "\u064A\u062C\u064A": {
+	      "final": "\uFDAF"
+	    },
+	    "\u064A\u0645\u064A": {
+	      "final": "\uFDB0"
+	    },
+	    "\u0645\u0645\u064A": {
+	      "final": "\uFDB1"
+	    },
+	    "\u0642\u0645\u064A": {
+	      "final": "\uFDB2"
+	    },
+	    "\u0646\u062D\u064A": {
+	      "final": "\uFDB3"
+	    },
+	    "\u0639\u0645\u064A": {
+	      "final": "\uFDB6"
+	    },
+	    "\u0643\u0645\u064A": {
+	      "final": "\uFDB7"
+	    },
+	    "\u0646\u062C\u062D": {
+	      "initial": "\uFDB8",
+	      "final": "\uFDBD"
+	    },
+	    "\u0645\u062E\u064A": {
+	      "final": "\uFDB9"
+	    },
+	    "\u0644\u062C\u0645": {
+	      "initial": "\uFDBA",
+	      "final": "\uFDBC"
+	    },
+	    "\u0643\u0645\u0645": {
+	      "final": "\uFDBB",
+	      "initial": "\uFDC3"
+	    },
+	    "\u062C\u062D\u064A": {
+	      "final": "\uFDBE"
+	    },
+	    "\u062D\u062C\u064A": {
+	      "final": "\uFDBF"
+	    },
+	    "\u0645\u062C\u064A": {
+	      "final": "\uFDC0"
+	    },
+	    "\u0641\u0645\u064A": {
+	      "final": "\uFDC1"
+	    },
+	    "\u0628\u062D\u064A": {
+	      "final": "\uFDC2"
+	    },
+	    "\u0633\u062E\u064A": {
+	      "final": "\uFDC6"
+	    },
+	    "\u0646\u062C\u064A": {
+	      "final": "\uFDC7"
+	    },
+	    "\u0644\u0622": {
+	      "isolated": "\uFEF5",
+	      "final": "\uFEF6"
+	    },
+	    "\u0644\u0623": {
+	      "isolated": "\uFEF7",
+	      "final": "\uFEF8"
+	    },
+	    "\u0644\u0625": {
+	      "isolated": "\uFEF9",
+	      "final": "\uFEFA"
+	    },
+	    "\u0644\u0627": {
+	      "isolated": "\uFEFB",
+	      "final": "\uFEFC"
+	    },
+	    "words": {
+	      "\u0635\u0644\u06D2": "\uFDF0",
+	      "\u0642\u0644\u06D2": "\uFDF1",
+	      "\u0627\u0644\u0644\u0647": "\uFDF2",
+	      "\u0627\u0643\u0628\u0631": "\uFDF3",
+	      "\u0645\u062D\u0645\u062F": "\uFDF4",
+	      "\u0635\u0644\u0639\u0645": "\uFDF5",
+	      "\u0631\u0633\u0648\u0644": "\uFDF6",
+	      "\u0639\u0644\u064A\u0647": "\uFDF7",
+	      "\u0648\u0633\u0644\u0645": "\uFDF8",
+	      "\u0635\u0644\u0649": "\uFDF9",
+	      "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
+	      "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
+	      "\u0631\u06CC\u0627\u0644": "\uFDFC"
+	    }
+	  };
+	  exports["default"] = ligatureReference;
+	});
 
-	function abortRequest(controller) {
-	  if (controller) {
-	    controller.abort();
-	  }
-	}
+	var reference = createCommonjsModule(function (module, exports) {
 
-	function abortUnwantedRequests(cache, tiles) {
-	  Object.keys(cache.inflightTile).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) { return k === tile.id; });
-	    if (!wanted) {
-	      abortRequest(cache.inflightTile[k]);
-	      delete cache.inflightTile[k];
-	    }
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
 	  });
-	}
-
-
-	function encodeIssueRtree(d) {
-	  return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-	}
-
-
-	// Replace or remove QAItem from rtree
-	function updateRtree(item, replace) {
-	  _cache.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });
-
-	  if (replace) {
-	    _cache.rtree.insert(item);
-	  }
-	}
-
-
-	function tokenReplacements(d) {
-	  if (!(d instanceof QAItem)) { return; }
-
-	  var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
-	  var replacements = {};
-
-	  var issueTemplate = _krData.errorTypes[d.whichType];
-	  if (!issueTemplate) {
-	    /* eslint-disable no-console */
-	    console.log('No Template: ', d.whichType);
-	    console.log('  ', d.description);
-	    /* eslint-enable no-console */
-	    return;
-	  }
-
-	  // some descriptions are just fixed text
-	  if (!issueTemplate.regex) { return; }
-
-	  // regex pattern should match description with variable details captured
-	  var errorRegex = new RegExp(issueTemplate.regex, 'i');
-	  var errorMatch = errorRegex.exec(d.description);
-	  if (!errorMatch) {
-	    /* eslint-disable no-console */
-	    console.log('Unmatched: ', d.whichType);
-	    console.log('  ', d.description);
-	    console.log('  ', errorRegex);
-	    /* eslint-enable no-console */
-	    return;
-	  }
+	  var letterList = Object.keys(unicodeArabic["default"]);
+	  exports.letterList = letterList;
+	  var ligatureList = Object.keys(unicodeLigatures["default"]);
+	  exports.ligatureList = ligatureList;
+	  var ligatureWordList = Object.keys(unicodeLigatures["default"].words);
+	  exports.ligatureWordList = ligatureWordList;
+	  var lams = "\u0644\u06B5\u06B6\u06B7\u06B8";
+	  exports.lams = lams;
+	  var alefs = "\u0627\u0622\u0623\u0625\u0671\u0672\u0673\u0675\u0773\u0774";
+	  exports.alefs = alefs; // for (var l = 1; l < lams.length; l++) {
+	  //   console.log('-');
+	  //   for (var a = 0; a < alefs.length; a++) {
+	  //     console.log(a + ': ' + lams[l] + alefs[a]);
+	  //   }
+	  // }
 
-	  for (var i = 1; i < errorMatch.length; i++) {   // skip first
-	    var capture = errorMatch[i];
-	    var idType = (void 0);
+	  var tashkeel = "\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8";
+	  exports.tashkeel = tashkeel;
 
-	    idType = 'IDs' in issueTemplate ? issueTemplate.IDs[i-1] : '';
-	    if (idType && capture) {   // link IDs if present in the capture
-	      capture = parseError(capture, idType);
-	    } else if (htmlRegex.test(capture)) {   // escape any html in non-IDs
-	      capture = '\\' +  capture + '\\';
-	    } else {
-	      var compare = capture.toLowerCase();
-	      if (_krData.localizeStrings[compare]) {   // some replacement strings can be localized
-	        capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
-	      }
+	  function addToTashkeel(start, finish) {
+	    for (var i = start; i <= finish; i++) {
+	      exports.tashkeel = tashkeel += String.fromCharCode(i);
 	    }
-
-	    replacements['var' + i] = capture;
 	  }
 
-	  return replacements;
-	}
-
+	  addToTashkeel(0x0610, 0x061A);
+	  addToTashkeel(0x064B, 0x065F);
+	  addToTashkeel(0x06D6, 0x06DC);
+	  addToTashkeel(0x06E0, 0x06E4);
+	  addToTashkeel(0x06EA, 0x06ED);
+	  addToTashkeel(0x08D3, 0x08E1);
+	  addToTashkeel(0x08E3, 0x08FF);
+	  addToTashkeel(0xFE70, 0xFE7F);
+	  var lineBreakers = "\u0627\u0629\u0648\u06C0\u06CF\u06FD\u06FE\u076B\u076C\u0771\u0773\u0774\u0778\u0779\u08E2\u08B1\u08B2\u08B9";
+	  exports.lineBreakers = lineBreakers;
 
-	function parseError(capture, idType) {
-	  var compare = capture.toLowerCase();
-	  if (_krData.localizeStrings[compare]) {   // some replacement strings can be localized
-	    capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+	  function addToLineBreakers(start, finish) {
+	    for (var i = start; i <= finish; i++) {
+	      exports.lineBreakers = lineBreakers += String.fromCharCode(i);
+	    }
 	  }
 
-	  switch (idType) {
-	    // link a string like "this node"
-	    case 'this':
-	      capture = linkErrorObject(capture);
-	      break;
+	  addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored
 
-	    case 'url':
-	      capture = linkURL(capture);
-	      break;
+	  addToLineBreakers(0x0621, 0x0625);
+	  addToLineBreakers(0x062F, 0x0632);
+	  addToLineBreakers(0x0660, 0x066D); // numerals, math
 
-	    // link an entity ID
-	    case 'n':
-	    case 'w':
-	    case 'r':
-	      capture = linkEntity(idType + capture);
-	      break;
+	  addToLineBreakers(0x0671, 0x0677);
+	  addToLineBreakers(0x0688, 0x0699);
+	  addToLineBreakers(0x06C3, 0x06CB);
+	  addToLineBreakers(0x06D2, 0x06F9);
+	  addToLineBreakers(0x0759, 0x075B);
+	  addToLineBreakers(0x08AA, 0x08AE);
+	  addToLineBreakers(0xFB50, 0xFDFD); // presentation forms look like they could connect, but never do
+	  // Presentation Forms A includes diacritics but they are meant to stand alone
 
-	    // some errors have more complex ID lists/variance
-	    case '20':
-	      capture = parse20(capture);
-	      break;
-	    case '211':
-	      capture = parse211(capture);
-	      break;
-	    case '231':
-	      capture = parse231(capture);
-	      break;
-	    case '294':
-	      capture = parse294(capture);
-	      break;
-	    case '370':
-	      capture = parse370(capture);
-	      break;
-	  }
+	  addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
+	  // numerals, math
 
-	  return capture;
+	  addToLineBreakers(0x10E60, 0x10E7F);
+	  addToLineBreakers(0x1EC70, 0x1ECBF);
+	  addToLineBreakers(0x1EE00, 0x1EEFF);
+	});
 
+	var GlyphSplitter_1 = createCommonjsModule(function (module, exports) {
 
-	  function linkErrorObject(d) {
-	    return ("<a class=\"error_object_link\">" + d + "</a>");
-	  }
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
 
-	  function linkEntity(d) {
-	    return ("<a class=\"error_entity_link\">" + d + "</a>");
-	  }
+	  function GlyphSplitter(word) {
+	    var letters = [];
+	    var lastLetter = '';
+	    word.split('').forEach(function (letter) {
+	      if (isArabic_1.isArabic(letter)) {
+	        if (reference.tashkeel.indexOf(letter) > -1) {
+	          letters[letters.length - 1] += letter;
+	        } else if (lastLetter.length && (reference.lams.indexOf(lastLetter) === 0 && reference.alefs.indexOf(letter) > -1 || reference.lams.indexOf(lastLetter) > 0 && reference.alefs.indexOf(letter) === 0)) {
+	          // valid LA forms
+	          letters[letters.length - 1] += letter;
+	        } else {
+	          letters.push(letter);
+	        }
+	      } else {
+	        letters.push(letter);
+	      }
 
-	  function linkURL(d) {
-	    return ("<a class=\"kr_external_link\" target=\"_blank\" href=\"" + d + "\">" + d + "</a>");
+	      if (reference.tashkeel.indexOf(letter) === -1) {
+	        lastLetter = letter;
+	      }
+	    });
+	    return letters;
 	  }
 
-	  // arbitrary node list of form: #ID, #ID, #ID...
-	  function parse211(capture) {
-	    var newList = [];
-	    var items = capture.split(', ');
+	  exports.GlyphSplitter = GlyphSplitter;
+	});
 
-	    items.forEach(function (item) {
-	      // ID has # at the front
-	      var id = linkEntity('n' + item.slice(1));
-	      newList.push(id);
-	    });
+	var BaselineSplitter_1 = createCommonjsModule(function (module, exports) {
 
-	    return newList.join(', ');
-	  }
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
 
-	  // arbitrary way list of form: #ID(layer),#ID(layer),#ID(layer)...
-	  function parse231(capture) {
-	    var newList = [];
-	    // unfortunately 'layer' can itself contain commas, so we split on '),'
-	    var items = capture.split('),');
+	  function BaselineSplitter(word) {
+	    var letters = [];
+	    var lastLetter = '';
+	    word.split('').forEach(function (letter) {
+	      if (isArabic_1.isArabic(letter) && isArabic_1.isArabic(lastLetter)) {
+	        if (lastLetter.length && reference.tashkeel.indexOf(letter) > -1) {
+	          letters[letters.length - 1] += letter;
+	        } else if (reference.lineBreakers.indexOf(lastLetter) > -1) {
+	          letters.push(letter);
+	        } else {
+	          letters[letters.length - 1] += letter;
+	        }
+	      } else {
+	        letters.push(letter);
+	      }
 
-	    items.forEach(function (item) {
-	      var match = item.match(/\#(\d+)\((.+)\)?/);
-	      if (match !== null && match.length > 2) {
-	        newList.push(linkEntity('w' + match[1]) + ' ' +
-	          _t('QA.keepRight.errorTypes.231.layer', { layer: match[2] })
-	        );
+	      if (reference.tashkeel.indexOf(letter) === -1) {
+	        // don't allow tashkeel to hide line break
+	        lastLetter = letter;
 	      }
 	    });
-
-	    return newList.join(', ');
+	    return letters;
 	  }
 
-	  // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
-	  function parse294(capture) {
-	    var newList = [];
-	    var items = capture.split(',');
-
-	    items.forEach(function (item) {
-	      // item of form "from/to node/relation #ID"
-	      item = item.split(' ');
-
-	      // to/from role is more clear in quotes
-	      var role = "\"" + (item[0]) + "\"";
-
-	      // first letter of node/relation provides the type
-	      var idType = item[1].slice(0,1);
-
-	      // ID has # at the front
-	      var id = item[2].slice(1);
-	      id = linkEntity(idType + id);
-
-	      newList.push((role + " " + (item[1]) + " " + id));
-	    });
+	  exports.BaselineSplitter = BaselineSplitter;
+	});
 
-	    return newList.join(', ');
-	  }
+	var Normalization = createCommonjsModule(function (module, exports) {
 
-	  // may or may not include the string "(including the name 'name')"
-	  function parse370(capture) {
-	    if (!capture) { return ''; }
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
 
-	    var match = capture.match(/\(including the name (\'.+\')\)/);
-	    if (match && match.length) {
-	      return _t('QA.keepRight.errorTypes.370.including_the_name', { name: match[1] });
+	  function Normal(word, breakPresentationForm) {
+	    // default is to turn initial/isolated/medial/final presentation form to generic
+	    if (typeof breakPresentationForm === 'undefined') {
+	      breakPresentationForm = true;
 	    }
-	    return '';
-	  }
-
-	  // arbitrary node list of form: #ID,#ID,#ID...
-	  function parse20(capture) {
-	    var newList = [];
-	    var items = capture.split(',');
 
-	    items.forEach(function (item) {
-	      // ID has # at the front
-	      var id = linkEntity('n' + item.slice(1));
-	      newList.push(id);
-	    });
+	    var returnable = '';
+	    word.split('').forEach(function (letter) {
+	      if (!isArabic_1.isArabic(letter)) {
+	        returnable += letter;
+	        return;
+	      }
 
-	    return newList.join(', ');
-	  }
-	}
+	      for (var w = 0; w < reference.letterList.length; w++) {
+	        // ok so we are checking this potential lettertron
+	        var letterForms = unicodeArabic["default"][reference.letterList[w]];
+	        var versions = Object.keys(letterForms);
 
+	        for (var v = 0; v < versions.length; v++) {
+	          var localVersion = letterForms[versions[v]];
 
-	var serviceKeepRight = {
-	  title: 'keepRight',
+	          if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	            // look at this embedded object
+	            var embeddedForms = Object.keys(localVersion);
 
-	  init: function init() {
-	    _mainFileFetcher.get('keepRight')
-	      .then(function (d) { return _krData = d; });
+	            for (var ef = 0; ef < embeddedForms.length; ef++) {
+	              var form = localVersion[embeddedForms[ef]];
 
-	    if (!_cache) {
-	      this.reset();
-	    }
+	              if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+	                // match
+	                // console.log('embedded match');
+	                if (form === letter) {
+	                  // match exact
+	                  if (breakPresentationForm && localVersion['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(embeddedForms[ef]) > -1) {
+	                    // replace presentation form
+	                    // console.log('keeping normal form of the letter');
+	                    if (_typeof(localVersion['normal']) === 'object') {
+	                      returnable += localVersion['normal'][0];
+	                    } else {
+	                      returnable += localVersion['normal'];
+	                    }
 
-	    this.event = utilRebind(this, dispatch$1, 'on');
-	  },
+	                    return;
+	                  } // console.log('keeping this letter');
 
-	  reset: function reset() {
-	    if (_cache) {
-	      Object.values(_cache.inflightTile).forEach(abortRequest);
-	    }
 
-	    _cache = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush()
-	    };
-	  },
+	                  returnable += letter;
+	                  return;
+	                } else if (_typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+	                  // match
+	                  returnable += form[0]; // console.log('added the first letter from the same array');
 
+	                  return;
+	                }
+	              }
+	            }
+	          } else if (localVersion === letter) {
+	            // match exact
+	            if (breakPresentationForm && letterForms['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(versions[v]) > -1) {
+	              // replace presentation form
+	              // console.log('keeping normal form of the letter');
+	              if (_typeof(letterForms['normal']) === 'object') {
+	                returnable += letterForms['normal'][0];
+	              } else {
+	                returnable += letterForms['normal'];
+	              }
 
-	  // KeepRight API:  http://osm.mueschelsoft.de/keepright/interfacing.php
-	  loadIssues: function loadIssues(projection) {
-	    var this$1 = this;
+	              return;
+	            } // console.log('keeping this letter');
 
-	    var options = {
-	      format: 'geojson',
-	      ch: _krRuleset
-	    };
 
-	    // determine the needed tiles to cover the view
-	    var tiles = tiler
-	      .zoomExtent([_tileZoom, _tileZoom])
-	      .getTiles(projection);
+	            returnable += letter;
+	            return;
+	          } else if (_typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+	            // match
+	            returnable += localVersion[0]; // console.log('added the first letter from the same array');
 
-	    // abort inflight requests that are no longer needed
-	    abortUnwantedRequests(_cache, tiles);
+	            return;
+	          }
+	        }
+	      } // try ligatures
 
-	    // issue new requests..
-	    tiles.forEach(function (tile) {
-	      if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) { return; }
-
-	      var ref = tile.extent.rectangle();
-	      var left = ref[0];
-	      var top = ref[1];
-	      var right = ref[2];
-	      var bottom = ref[3];
-	      var params = Object.assign({}, options, { left: left, bottom: bottom, right: right, top: top });
-	      var url = _krUrlRoot + "/export.php?" + utilQsString(params);
-	      var controller = new AbortController();
 
-	      _cache.inflightTile[tile.id] = controller;
+	      for (var v2 = 0; v2 < reference.ligatureList.length; v2++) {
+	        var normalForm = reference.ligatureList[v2];
 
-	      d3_json(url, { signal: controller.signal })
-	        .then(function (data) {
-	          delete _cache.inflightTile[tile.id];
-	          _cache.loadedTile[tile.id] = true;
-	          if (!data || !data.features || !data.features.length) {
-	            throw new Error('No Data');
-	          }
+	        if (normalForm !== 'words') {
+	          var ligForms = Object.keys(unicodeLigatures["default"][normalForm]);
 
-	          data.features.forEach(function (feature) {
-	            var feature_properties = feature.properties;
-	            var itemType = feature_properties.error_type;
-	            var id = feature_properties.error_id;
-	            var comment = feature_properties.comment; if ( comment === void 0 ) comment = null;
-	            var objectId = feature_properties.object_id;
-	            var objectType = feature_properties.object_type;
-	            var schema = feature_properties.schema;
-	            var title = feature_properties.title;
-	            var loc = feature.geometry.coordinates;
-	            var description = feature.properties.description; if ( description === void 0 ) description = '';
-
-	            // if there is a parent, save its error type e.g.:
-	            //  Error 191 = "highway-highway"
-	            //  Error 190 = "intersections without junctions"  (parent)
-	            var issueTemplate = _krData.errorTypes[itemType];
-	            var parentIssueType = (Math.floor(itemType / 10) * 10).toString();
-
-	            // try to handle error type directly, fallback to parent error type.
-	            var whichType = issueTemplate ? itemType : parentIssueType;
-	            var whichTemplate = _krData.errorTypes[whichType];
-
-	            // Rewrite a few of the errors at this point..
-	            // This is done to make them easier to linkify and translate.
-	            switch (whichType) {
-	              case '170':
-	                description = "This feature has a FIXME tag: " + description;
-	                break;
-	              case '292':
-	              case '293':
-	                description = description.replace('A turn-', 'This turn-');
-	                break;
-	              case '294':
-	              case '295':
-	              case '296':
-	              case '297':
-	              case '298':
-	                description = "This turn-restriction~" + description;
-	                break;
-	              case '300':
-	                description = 'This highway is missing a maxspeed tag';
-	                break;
-	              case '411':
-	              case '412':
-	              case '413':
-	                description = "This feature~" + description;
-	                break;
+	          for (var f = 0; f < ligForms.length; f++) {
+	            if (unicodeLigatures["default"][normalForm][ligForms[f]] === letter) {
+	              returnable += normalForm;
+	              return;
 	            }
+	          }
+	        }
+	      } // try words ligatures
 
-	            // move markers slightly so it doesn't obscure the geometry,
-	            // then move markers away from other coincident markers
-	            var coincident = false;
-	            do {
-	              // first time, move marker up. after that, move marker right.
-	              var delta = coincident ? [0.00001, 0] : [0, 0.00001];
-	              loc = geoVecAdd(loc, delta);
-	              var bbox = geoExtent(loc).bbox();
-	              coincident = _cache.rtree.search(bbox).length;
-	            } while (coincident);
-
-	            var d = new QAItem(loc, this$1, itemType, id, {
-	              comment: comment,
-	              description: description,
-	              whichType: whichType,
-	              parentIssueType: parentIssueType,
-	              severity: whichTemplate.severity || 'error',
-	              objectId: objectId,
-	              objectType: objectType,
-	              schema: schema,
-	              title: title
-	            });
-
-	            d.replacements = tokenReplacements(d);
 
-	            _cache.data[id] = d;
-	            _cache.rtree.insert(encodeIssueRtree(d));
-	          });
+	      for (var v3 = 0; v3 < reference.ligatureWordList.length; v3++) {
+	        var _normalForm = reference.ligatureWordList[v3];
 
-	          dispatch$1.call('loaded');
-	        })
-	        .catch(function () {
-	          delete _cache.inflightTile[tile.id];
-	          _cache.loadedTile[tile.id] = true;
-	        });
+	        if (unicodeLigatures["default"].words[_normalForm] === letter) {
+	          returnable += _normalForm;
+	          return;
+	        }
+	      }
 
+	      returnable += letter; // console.log('kept the letter')
 	    });
-	  },
-
+	    return returnable;
+	  }
 
-	  postUpdate: function postUpdate(d, callback) {
-	    var this$1 = this;
+	  exports.Normal = Normal;
+	});
 
-	    if (_cache.inflightPost[d.id]) {
-	      return callback({ message: 'Error update already inflight', status: -2 }, d);
-	    }
+	var CharShaper_1 = createCommonjsModule(function (module, exports) {
 
-	    var params = { schema: d.schema, id: d.id };
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
 
-	    if (d.newStatus) {
-	      params.st = d.newStatus;
+	  function CharShaper(letter, form) {
+	    if (!isArabic_1.isArabic(letter)) {
+	      // fail not Arabic
+	      throw new Error('Not Arabic');
 	    }
-	    if (d.newComment !== undefined) {
-	      params.co = d.newComment;
+
+	    if (letter === "\u0621") {
+	      // hamza alone
+	      return "\u0621";
 	    }
 
-	    // NOTE: This throws a CORS err, but it seems successful.
-	    // We don't care too much about the response, so this is fine.
-	    var url = _krUrlRoot + "/comment.php?" + utilQsString(params);
-	    var controller = new AbortController();
+	    for (var w = 0; w < reference.letterList.length; w++) {
+	      // ok so we are checking this potential lettertron
+	      var letterForms = unicodeArabic["default"][reference.letterList[w]];
+	      var versions = Object.keys(letterForms);
 
-	    _cache.inflightPost[d.id] = controller;
+	      for (var v = 0; v < versions.length; v++) {
+	        var localVersion = letterForms[versions[v]];
 
-	    // Since this is expected to throw an error just continue as if it worked
-	    // (worst case scenario the request truly fails and issue will show up if iD restarts)
-	    d3_json(url, { signal: controller.signal })
-	      .finally(function () {
-	        delete _cache.inflightPost[d.id];
-
-	        if (d.newStatus === 'ignore') {
-	          // ignore permanently (false positive)
-	          this$1.removeItem(d);
-	        } else if (d.newStatus === 'ignore_t') {
-	          // ignore temporarily (error fixed)
-	          this$1.removeItem(d);
-	          _cache.closed[((d.schema) + ":" + (d.id))] = true;
-	        } else {
-	          d = this$1.replaceItem(d.update({
-	            comment: d.newComment,
-	            newComment: undefined,
-	            newState: undefined
-	          }));
+	        if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+	          if (versions.indexOf(form) > -1) {
+	            return letterForms[form];
+	          }
+	        } else if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	          // check embedded
+	          var embeddedVersions = Object.keys(localVersion);
+
+	          for (var ev = 0; ev < embeddedVersions.length; ev++) {
+	            if (localVersion[embeddedVersions[ev]] === letter || _typeof(localVersion[embeddedVersions[ev]]) === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1) {
+	              if (embeddedVersions.indexOf(form) > -1) {
+	                return localVersion[form];
+	              }
+	            }
+	          }
 	        }
-
-	        if (callback) { callback(null, d); }
-	      });
-	  },
-
-	  // Get all cached QAItems covering the viewport
-	  getItems: function getItems(projection) {
-	    var viewport = projection.clipExtent();
-	    var min = [viewport[0][0], viewport[1][1]];
-	    var max = [viewport[1][0], viewport[0][1]];
-	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-
-	    return _cache.rtree.search(bbox).map(function (d) { return d.data; });
-	  },
-
-	  // Get a QAItem from cache
-	  // NOTE: Don't change method name until UI v3 is merged
-	  getError: function getError(id) {
-	    return _cache.data[id];
-	  },
-
-	  // Replace a single QAItem in the cache
-	  replaceItem: function replaceItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
-
-	    _cache.data[item.id] = item;
-	    updateRtree(encodeIssueRtree(item), true); // true = replace
-	    return item;
-	  },
-
-	  // Remove a single QAItem from the cache
-	  removeItem: function removeItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
-
-	    delete _cache.data[item.id];
-	    updateRtree(encodeIssueRtree(item), false); // false = remove
-	  },
-
-	  issueURL: function issueURL(item) {
-	    return (_krUrlRoot + "/report_map.php?schema=" + (item.schema) + "&error=" + (item.id));
-	  },
-
-	  // Get an array of issues closed during this session.
-	  // Used to populate `closed:keepright` changeset tag
-	  getClosedIDs: function getClosedIDs() {
-	    return Object.keys(_cache.closed).sort();
+	      }
+	    }
 	  }
 
-	};
-
-	var tiler$1 = utilTiler();
-	var dispatch$2 = dispatch('loaded');
-	var _tileZoom$1 = 14;
-	var _impOsmUrls = {
-	  ow: 'https://grab.community.improve-osm.org/directionOfFlowService',
-	  mr: 'https://grab.community.improve-osm.org/missingGeoService',
-	  tr: 'https://grab.community.improve-osm.org/turnRestrictionService'
-	};
-	var _impOsmData = { icons: {} };
-
-
-	// This gets reassigned if reset
-	var _cache$1;
+	  exports.CharShaper = CharShaper;
+	});
 
-	function abortRequest$1(i) {
-	  Object.values(i).forEach(function (controller) {
-	    if (controller) {
-	      controller.abort();
-	    }
-	  });
-	}
+	var WordShaper_1 = createCommonjsModule(function (module, exports) {
 
-	function abortUnwantedRequests$1(cache, tiles) {
-	  Object.keys(cache.inflightTile).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) { return k === tile.id; });
-	    if (!wanted) {
-	      abortRequest$1(cache.inflightTile[k]);
-	      delete cache.inflightTile[k];
-	    }
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
 	  });
-	}
 
-	function encodeIssueRtree$1(d) {
-	  return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-	}
+	  function WordShaper(word) {
+	    var state = 'initial';
+	    var output = '';
 
-	// Replace or remove QAItem from rtree
-	function updateRtree$1(item, replace) {
-	  _cache$1.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });
+	    for (var w = 0; w < word.length; w++) {
+	      var nextLetter = ' ';
 
-	  if (replace) {
-	    _cache$1.rtree.insert(item);
-	  }
-	}
+	      for (var nxw = w + 1; nxw < word.length; nxw++) {
+	        if (!isArabic_1.isArabic(word[nxw])) {
+	          break;
+	        }
 
-	function linkErrorObject(d) {
-	  return ("<a class=\"error_object_link\">" + d + "</a>");
-	}
+	        if (reference.tashkeel.indexOf(word[nxw]) === -1) {
+	          nextLetter = word[nxw];
+	          break;
+	        }
+	      }
 
-	function linkEntity(d) {
-	  return ("<a class=\"error_entity_link\">" + d + "</a>");
-	}
+	      if (!isArabic_1.isArabic(word[w]) || isArabic_1.isMath(word[w])) {
+	        // space or other non-Arabic
+	        output += word[w];
+	        state = 'initial';
+	      } else if (reference.tashkeel.indexOf(word[w]) > -1) {
+	        // tashkeel - add without changing state
+	        output += word[w];
+	      } else if (nextLetter === ' ' || // last Arabic letter in this word
+	      reference.lineBreakers.indexOf(word[w]) > -1) {
+	        // the current letter is known to break lines
+	        output += CharShaper_1.CharShaper(word[w], state === 'initial' ? 'isolated' : 'final');
+	        state = 'initial';
+	      } else if (reference.lams.indexOf(word[w]) > -1 && reference.alefs.indexOf(nextLetter) > -1) {
+	        // LA letters - advance an additional letter after this
+	        output += unicodeLigatures["default"][word[w] + nextLetter][state === 'initial' ? 'isolated' : 'final'];
+
+	        while (word[w] !== nextLetter) {
+	          w++;
+	        }
+
+	        state = 'initial';
+	      } else {
+	        output += CharShaper_1.CharShaper(word[w], state);
+	        state = 'medial';
+	      }
+	    }
 
-	function pointAverage(points) {
-	  if (points.length) {
-	    var sum = points.reduce(
-	      function (acc, point) { return geoVecAdd(acc, [point.lon, point.lat]); },
-	      [0,0]
-	    );
-	    return geoVecScale(sum, 1 / points.length);
-	  } else {
-	    return [0,0];
+	    return output;
 	  }
-	}
 
-	function relativeBearing(p1, p2) {
-	  var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
-	  if (angle < 0) {
-	    angle += 2 * Math.PI;
-	  }
+	  exports.WordShaper = WordShaper;
+	});
 
-	  // Return degrees
-	  return angle * 180 / Math.PI;
-	}
+	var ParentLetter_1 = createCommonjsModule(function (module, exports) {
 
-	// Assuming range [0,360)
-	function cardinalDirection(bearing) {
-	  var dir = 45 * Math.round(bearing / 45);
-	  var compass = {
-	    0: 'north',
-	    45: 'northeast',
-	    90: 'east',
-	    135: 'southeast',
-	    180: 'south',
-	    225: 'southwest',
-	    270: 'west',
-	    315: 'northwest',
-	    360: 'north'
-	  };
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
 
-	  return _t(("QA.improveOSM.directions." + (compass[dir])));
-	}
+	  function ParentLetter(letter) {
+	    if (!isArabic_1.isArabic(letter)) {
+	      throw new Error('Not an Arabic letter');
+	    }
 
-	// Errors shouldn't obscure eachother
-	function preventCoincident(loc, bumpUp) {
-	  var coincident = false;
-	  do {
-	    // first time, move marker up. after that, move marker right.
-	    var delta = coincident ? [0.00001, 0] : (bumpUp ? [0, 0.00001] : [0, 0]);
-	    loc = geoVecAdd(loc, delta);
-	    var bbox = geoExtent(loc).bbox();
-	    coincident = _cache$1.rtree.search(bbox).length;
-	  } while (coincident);
+	    for (var w = 0; w < reference.letterList.length; w++) {
+	      // ok so we are checking this potential lettertron
+	      var letterForms = unicodeArabic["default"][reference.letterList[w]];
+	      var versions = Object.keys(letterForms);
 
-	  return loc;
-	}
+	      for (var v = 0; v < versions.length; v++) {
+	        var localVersion = letterForms[versions[v]];
 
-	var serviceImproveOSM = {
-	  title: 'improveOSM',
+	        if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	          // look at this embedded object
+	          var embeddedForms = Object.keys(localVersion);
 
-	  init: function init() {
-	    _mainFileFetcher.get('qa_data')
-	      .then(function (d) { return _impOsmData = d.improveOSM; });
+	          for (var ef = 0; ef < embeddedForms.length; ef++) {
+	            var form = localVersion[embeddedForms[ef]];
 
-	    if (!_cache$1) {
-	      this.reset();
+	            if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+	              // match
+	              return localVersion;
+	            }
+	          }
+	        } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+	          // match
+	          return letterForms;
+	        }
+	      }
+
+	      return null;
 	    }
+	  }
 
-	    this.event = utilRebind(this, dispatch$2, 'on');
-	  },
+	  exports.ParentLetter = ParentLetter;
 
-	  reset: function reset() {
-	    if (_cache$1) {
-	      Object.values(_cache$1.inflightTile).forEach(abortRequest$1);
+	  function GrandparentLetter(letter) {
+	    if (!isArabic_1.isArabic(letter)) {
+	      throw new Error('Not an Arabic letter');
 	    }
-	    _cache$1 = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush()
-	    };
-	  },
 
-	  loadIssues: function loadIssues(projection) {
-	    var this$1 = this;
+	    for (var w = 0; w < reference.letterList.length; w++) {
+	      // ok so we are checking this potential lettertron
+	      var letterForms = unicodeArabic["default"][reference.letterList[w]];
+	      var versions = Object.keys(letterForms);
 
-	    var options = {
-	      client: 'iD',
-	      status: 'OPEN',
-	      zoom: '19' // Use a high zoom so that clusters aren't returned
-	    };
+	      for (var v = 0; v < versions.length; v++) {
+	        var localVersion = letterForms[versions[v]];
 
-	    // determine the needed tiles to cover the view
-	    var tiles = tiler$1
-	      .zoomExtent([_tileZoom$1, _tileZoom$1])
-	      .getTiles(projection);
+	        if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	          // look at this embedded object
+	          var embeddedForms = Object.keys(localVersion);
 
-	    // abort inflight requests that are no longer needed
-	    abortUnwantedRequests$1(_cache$1, tiles);
+	          for (var ef = 0; ef < embeddedForms.length; ef++) {
+	            var form = localVersion[embeddedForms[ef]];
 
-	    // issue new requests..
-	    tiles.forEach(function (tile) {
-	      if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) { return; }
+	            if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+	              // match
+	              return letterForms;
+	            }
+	          }
+	        } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+	          // match
+	          return letterForms;
+	        }
+	      }
 
-	      var ref = tile.extent.rectangle();
-	      var east = ref[0];
-	      var north = ref[1];
-	      var west = ref[2];
-	      var south = ref[3];
-	      var params = Object.assign({}, options, { east: east, south: south, west: west, north: north });
+	      return null;
+	    }
+	  }
 
-	      // 3 separate requests to store for each tile
-	      var requests = {};
+	  exports.GrandparentLetter = GrandparentLetter;
+	});
 
-	      Object.keys(_impOsmUrls).forEach(function (k) {
-	        // We exclude WATER from missing geometry as it doesn't seem useful
-	        // We use most confident one-way and turn restrictions only, still have false positives
-	        var kParams = Object.assign({},
-	          params,
-	          (k === 'mr') ? { type: 'PARKING,ROAD,BOTH,PATH' } : { confidenceLevel: 'C1' }
-	        );
-	        var url = (_impOsmUrls[k]) + "/search?" + utilQsString(kParams);
-	        var controller = new AbortController();
+	var lib = createCommonjsModule(function (module, exports) {
 
-	        requests[k] = controller;
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
+	  exports.isArabic = isArabic_1.isArabic;
+	  exports.GlyphSplitter = GlyphSplitter_1.GlyphSplitter;
+	  exports.BaselineSplitter = BaselineSplitter_1.BaselineSplitter;
+	  exports.Normal = Normalization.Normal;
+	  exports.CharShaper = CharShaper_1.CharShaper;
+	  exports.WordShaper = WordShaper_1.WordShaper;
+	  exports.ParentLetter = ParentLetter_1.ParentLetter;
+	  exports.GrandparentLetter = ParentLetter_1.GrandparentLetter;
+	});
 
-	        d3_json(url, { signal: controller.signal })
-	          .then(function (data) {
-	            delete _cache$1.inflightTile[tile.id][k];
-	            if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-	              delete _cache$1.inflightTile[tile.id];
-	              _cache$1.loadedTile[tile.id] = true;
-	            }
+	var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u07BF\u08A0–\u08BF]/;
+	function fixRTLTextForSvg(inputText) {
+	  var ret = '',
+	      rtlBuffer = [];
+	  var arabicRegex = /[\u0600-\u06FF]/g;
+	  var arabicDiacritics = /[\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06ED]/g;
+	  var arabicMath = /[\u0660-\u066C\u06F0-\u06F9]+/g;
+	  var thaanaVowel = /[\u07A6-\u07B0]/;
+	  var hebrewSign = /[\u0591-\u05bd\u05bf\u05c1-\u05c5\u05c7]/; // Arabic word shaping
 
-	            // Road segments at high zoom == oneways
-	            if (data.roadSegments) {
-	              data.roadSegments.forEach(function (feature) {
-	                // Position error at the approximate middle of the segment
-	                var points = feature.points;
-	                var wayId = feature.wayId;
-	                var fromNodeId = feature.fromNodeId;
-	                var toNodeId = feature.toNodeId;
-	                var itemId = "" + wayId + fromNodeId + toNodeId;
-	                var mid = points.length / 2;
-	                var loc;
-
-	                // Even number of points, find midpoint of the middle two
-	                // Odd number of points, use position of very middle point
-	                if (mid % 1 === 0) {
-	                  loc = pointAverage([points[mid - 1], points[mid]]);
-	                } else {
-	                  mid = points[Math.floor(mid)];
-	                  loc = [mid.lon, mid.lat];
-	                }
+	  if (arabicRegex.test(inputText)) {
+	    inputText = lib.WordShaper(inputText);
+	  }
 
-	                // One-ways can land on same segment in opposite direction
-	                loc = preventCoincident(loc, false);
-
-	                var d = new QAItem(loc, this$1, k, itemId, {
-	                  issueKey: k, // used as a category
-	                  identifier: { // used to post changes
-	                    wayId: wayId,
-	                    fromNodeId: fromNodeId,
-	                    toNodeId: toNodeId
-	                  },
-	                  objectId: wayId,
-	                  objectType: 'way'
-	                });
+	  for (var n = 0; n < inputText.length; n++) {
+	    var c = inputText[n];
 
-	                // Variables used in the description
-	                d.replacements = {
-	                  percentage: feature.percentOfTrips,
-	                  num_trips: feature.numberOfTrips,
-	                  highway: linkErrorObject(_t('QA.keepRight.error_parts.highway')),
-	                  from_node: linkEntity('n' + feature.fromNodeId),
-	                  to_node: linkEntity('n' + feature.toNodeId)
-	                };
+	    if (arabicMath.test(c)) {
+	      // Arabic numbers go LTR
+	      ret += rtlBuffer.reverse().join('');
+	      rtlBuffer = [c];
+	    } else {
+	      if (rtlBuffer.length && arabicMath.test(rtlBuffer[rtlBuffer.length - 1])) {
+	        ret += rtlBuffer.reverse().join('');
+	        rtlBuffer = [];
+	      }
 
-	                _cache$1.data[d.id] = d;
-	                _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	              });
-	            }
+	      if ((thaanaVowel.test(c) || hebrewSign.test(c) || arabicDiacritics.test(c)) && rtlBuffer.length) {
+	        rtlBuffer[rtlBuffer.length - 1] += c;
+	      } else if (rtlRegex.test(c) // include Arabic presentation forms
+	      || c.charCodeAt(0) >= 64336 && c.charCodeAt(0) <= 65023 || c.charCodeAt(0) >= 65136 && c.charCodeAt(0) <= 65279) {
+	        rtlBuffer.push(c);
+	      } else if (c === ' ' && rtlBuffer.length) {
+	        // whitespace within RTL text
+	        rtlBuffer = [rtlBuffer.reverse().join('') + ' '];
+	      } else {
+	        // non-RTL character
+	        ret += rtlBuffer.reverse().join('') + c;
+	        rtlBuffer = [];
+	      }
+	    }
+	  }
 
-	            // Tiles at high zoom == missing roads
-	            if (data.tiles) {
-	              data.tiles.forEach(function (feature) {
-	                var type = feature.type;
-	                var x = feature.x;
-	                var y = feature.y;
-	                var numberOfTrips = feature.numberOfTrips;
-	                var geoType = type.toLowerCase();
-	                var itemId = "" + geoType + x + y + numberOfTrips;
-
-	                // Average of recorded points should land on the missing geometry
-	                // Missing geometry could happen to land on another error
-	                var loc = pointAverage(feature.points);
-	                loc = preventCoincident(loc, false);
-
-	                var d = new QAItem(loc, this$1, (k + "-" + geoType), itemId, {
-	                  issueKey: k,
-	                  identifier: { x: x, y: y }
-	                });
+	  ret += rtlBuffer.reverse().join('');
+	  return ret;
+	}
 
-	                d.replacements = {
-	                  num_trips: numberOfTrips,
-	                  geometry_type: _t(("QA.improveOSM.geometry_types." + geoType))
-	                };
+	var propertyIsEnumerable = objectPropertyIsEnumerable.f;
 
-	                // -1 trips indicates data came from a 3rd party
-	                if (numberOfTrips === -1) {
-	                  d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
-	                }
+	// `Object.{ entries, values }` methods implementation
+	var createMethod$5 = function (TO_ENTRIES) {
+	  return function (it) {
+	    var O = toIndexedObject(it);
+	    var keys = objectKeys(O);
+	    var length = keys.length;
+	    var i = 0;
+	    var result = [];
+	    var key;
+	    while (length > i) {
+	      key = keys[i++];
+	      if (!descriptors || propertyIsEnumerable.call(O, key)) {
+	        result.push(TO_ENTRIES ? [key, O[key]] : O[key]);
+	      }
+	    }
+	    return result;
+	  };
+	};
 
-	                _cache$1.data[d.id] = d;
-	                _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	              });
-	            }
+	var objectToArray = {
+	  // `Object.entries` method
+	  // https://tc39.github.io/ecma262/#sec-object.entries
+	  entries: createMethod$5(true),
+	  // `Object.values` method
+	  // https://tc39.github.io/ecma262/#sec-object.values
+	  values: createMethod$5(false)
+	};
 
-	            // Entities at high zoom == turn restrictions
-	            if (data.entities) {
-	              data.entities.forEach(function (feature) {
-	                var point = feature.point;
-	                var id = feature.id;
-	                var segments = feature.segments;
-	                var numberOfPasses = feature.numberOfPasses;
-	                var turnType = feature.turnType;
-	                var itemId = "" + (id.replace(/[,:+#]/g, '_'));
-
-	                // Turn restrictions could be missing at same junction
-	                // We also want to bump the error up so node is accessible
-	                var loc = preventCoincident([point.lon, point.lat], true);
-
-	                // Elements are presented in a strange way
-	                var ids = id.split(',');
-	                var from_way = ids[0];
-	                var via_node = ids[3];
-	                var to_way = ids[2].split(':')[1];
-
-	                var d = new QAItem(loc, this$1, k, itemId, {
-	                  issueKey: k,
-	                  identifier: id,
-	                  objectId: via_node,
-	                  objectType: 'node'
-	                });
+	var $values = objectToArray.values;
 
-	                // Travel direction along from_way clarifies the turn restriction
-	                var ref = segments[0].points;
-	                var p1 = ref[0];
-	                var p2 = ref[1];
-	                var dir_of_travel = cardinalDirection(relativeBearing(p1, p2));
-
-	                // Variables used in the description
-	                d.replacements = {
-	                  num_passed: numberOfPasses,
-	                  num_trips: segments[0].numberOfTrips,
-	                  turn_restriction: turnType.toLowerCase(),
-	                  from_way: linkEntity('w' + from_way),
-	                  to_way: linkEntity('w' + to_way),
-	                  travel_direction: dir_of_travel,
-	                  junction: linkErrorObject(_t('QA.keepRight.error_parts.this_node'))
-	                };
+	// `Object.values` method
+	// https://tc39.github.io/ecma262/#sec-object.values
+	_export({ target: 'Object', stat: true }, {
+	  values: function values(O) {
+	    return $values(O);
+	  }
+	});
 
-	                _cache$1.data[d.id] = d;
-	                _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	                dispatch$2.call('loaded');
-	              });
-	            }
-	          })
-	          .catch(function () {
-	            delete _cache$1.inflightTile[tile.id][k];
-	            if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-	              delete _cache$1.inflightTile[tile.id];
-	              _cache$1.loadedTile[tile.id] = true;
-	            }
-	          });
-	      });
+	// https://github.com/openstreetmap/iD/issues/772
+	// http://mathiasbynens.be/notes/localstorage-pattern#comment-9
+	var _storage;
 
-	      _cache$1.inflightTile[tile.id] = requests;
-	    });
-	  },
+	try {
+	  _storage = localStorage;
+	} catch (e) {} // eslint-disable-line no-empty
 
-	  getComments: function getComments(item) {
-	    var this$1 = this;
 
-	    // If comments already retrieved no need to do so again
-	    if (item.comments) {
-	      return Promise.resolve(item);
+	_storage = _storage || function () {
+	  var s = {};
+	  return {
+	    getItem: function getItem(k) {
+	      return s[k];
+	    },
+	    setItem: function setItem(k, v) {
+	      return s[k] = v;
+	    },
+	    removeItem: function removeItem(k) {
+	      return delete s[k];
 	    }
+	  };
+	}(); //
+	// corePreferences is an interface for persisting basic key-value strings
+	// within and between iD sessions on the same site.
+	//
 
-	    var key = item.issueKey;
-	    var qParams = {};
 
-	    if (key === 'ow') {
-	      qParams = item.identifier;
-	    } else if (key === 'mr') {
-	      qParams.tileX = item.identifier.x;
-	      qParams.tileY = item.identifier.y;
-	    } else if (key === 'tr') {
-	      qParams.targetId = item.identifier;
+	function corePreferences(k, v) {
+	  try {
+	    if (arguments.length === 1) return _storage.getItem(k);else if (v === null) _storage.removeItem(k);else _storage.setItem(k, v);
+	  } catch (e) {
+	    /* eslint-disable no-console */
+	    if (typeof console !== 'undefined') {
+	      console.error('localStorage quota exceeded');
 	    }
+	    /* eslint-enable no-console */
 
-	    var url = (_impOsmUrls[key]) + "/retrieveComments?" + utilQsString(qParams);
-	    var cacheComments = function (data) {
-	      // Assign directly for immediate use afterwards
-	      // comments are served newest to oldest
-	      item.comments = data.comments ? data.comments.reverse() : [];
-	      this$1.replaceItem(item);
-	    };
+	  }
+	}
 
-	    return d3_json(url).then(cacheComments).then(function () { return item; });
-	  },
+	function responseText(response) {
+	  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+	  return response.text();
+	}
 
-	  postUpdate: function postUpdate(d, callback) {
-	    if (!serviceOsm.authenticated()) { // Username required in payload
-	      return callback({ message: 'Not Authenticated', status: -3}, d);
-	    }
-	    if (_cache$1.inflightPost[d.id]) {
-	      return callback({ message: 'Error update already inflight', status: -2 }, d);
-	    }
+	function d3_text (input, init) {
+	  return fetch(input, init).then(responseText);
+	}
 
-	    // Payload can only be sent once username is established
-	    serviceOsm.userDetails(sendPayload.bind(this));
+	function responseJson(response) {
+	  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+	  if (response.status === 204 || response.status === 205) return;
+	  return response.json();
+	}
 
-	    function sendPayload(err, user) {
-	      var this$1 = this;
+	function d3_json (input, init) {
+	  return fetch(input, init).then(responseJson);
+	}
 
-	      if (err) { return callback(err, d); }
+	function parser(type) {
+	  return function (input, init) {
+	    return d3_text(input, init).then(function (text) {
+	      return new DOMParser().parseFromString(text, type);
+	    });
+	  };
+	}
 
-	      var key = d.issueKey;
-	      var url = (_impOsmUrls[key]) + "/comment";
-	      var payload = {
-	        username: user.display_name,
-	        targetIds: [ d.identifier ]
-	      };
+	var d3_xml = parser("application/xml");
+	var svg = parser("image/svg+xml");
 
-	      if (d.newStatus) {
-	        payload.status = d.newStatus;
-	        payload.text = 'status changed';
-	      }
+	var _mainFileFetcher = coreFileFetcher(); // singleton
+	// coreFileFetcher asynchronously fetches data from JSON files
+	//
 
-	      // Comment take place of default text
-	      if (d.newComment) {
-	        payload.text = d.newComment;
-	      }
+	function coreFileFetcher() {
+	  var _this = {};
+	  var _inflight = {};
+	  var _fileMap = {
+	    'address_formats': 'data/address_formats.min.json',
+	    'deprecated': 'data/deprecated.min.json',
+	    'discarded': 'data/discarded.min.json',
+	    'imagery': 'data/imagery.min.json',
+	    'intro_graph': 'data/intro_graph.min.json',
+	    'keepRight': 'data/keepRight.min.json',
+	    'languages': 'data/languages.min.json',
+	    'locales': 'data/locales.min.json',
+	    'nsi_brands': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@4/dist/brands.min.json',
+	    'nsi_filters': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@4/dist/filters.min.json',
+	    'oci_features': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/features.min.json',
+	    'oci_resources': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/resources.min.json',
+	    'preset_categories': 'data/preset_categories.min.json',
+	    'preset_defaults': 'data/preset_defaults.min.json',
+	    'preset_fields': 'data/preset_fields.min.json',
+	    'preset_presets': 'data/preset_presets.min.json',
+	    'phone_formats': 'data/phone_formats.min.json',
+	    'qa_data': 'data/qa_data.min.json',
+	    'shortcuts': 'data/shortcuts.min.json',
+	    'territory_languages': 'data/territory_languages.min.json',
+	    'wmf_sitematrix': 'https://cdn.jsdelivr.net/npm/wmf-sitematrix@0.1/wikipedia.min.json'
+	  };
+	  var _cachedData = {}; // expose the cache; useful for tests
 
-	      var controller = new AbortController();
-	      _cache$1.inflightPost[d.id] = controller;
+	  _this.cache = function () {
+	    return _cachedData;
+	  }; // Returns a Promise to fetch data
+	  // (resolved with the data if we have it already)
 
-	      var options = {
-	        method: 'POST',
-	        signal: controller.signal,
-	        body: JSON.stringify(payload)
-	      };
 
-	      d3_json(url, options)
-	        .then(function () {
-	          delete _cache$1.inflightPost[d.id];
+	  _this.get = function (which) {
+	    if (_cachedData[which]) {
+	      return Promise.resolve(_cachedData[which]);
+	    }
 
-	          // Just a comment, update error in cache
-	          if (!d.newStatus) {
-	            var now = new Date();
-	            var comments = d.comments ? d.comments : [];
+	    var file = _fileMap[which];
 
-	            comments.push({
-	              username: payload.username,
-	              text: payload.text,
-	              timestamp: now.getTime() / 1000
-	            });
+	    var url = file && _this.asset(file);
 
-	            this$1.replaceItem(d.update({
-	              comments: comments,
-	              newComment: undefined
-	            }));
-	          } else {
-	            this$1.removeItem(d);
-	            if (d.newStatus === 'SOLVED') {
-	              // Keep track of the number of issues closed per type to tag the changeset
-	              if (!(d.issueKey in _cache$1.closed)) {
-	                _cache$1.closed[d.issueKey] = 0;
-	              }
-	              _cache$1.closed[d.issueKey] += 1;
-	            }
-	          }
-	          if (callback) { callback(null, d); }
-	        })
-	        .catch(function (err) {
-	          delete _cache$1.inflightPost[d.id];
-	          if (callback) { callback(err.message); }
-	        });
+	    if (!url) {
+	      return Promise.reject("Unknown data file for \"".concat(which, "\""));
 	    }
-	  },
 
+	    var prom = _inflight[url];
 
-	  // Get all cached QAItems covering the viewport
-	  getItems: function getItems(projection) {
-	    var viewport = projection.clipExtent();
-	    var min = [viewport[0][0], viewport[1][1]];
-	    var max = [viewport[1][0], viewport[0][1]];
-	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    if (!prom) {
+	      _inflight[url] = prom = d3_json(url).then(function (result) {
+	        delete _inflight[url];
 
-	    return _cache$1.rtree.search(bbox).map(function (d) { return d.data; });
-	  },
+	        if (!result) {
+	          throw new Error("No data loaded for \"".concat(which, "\""));
+	        }
 
-	  // Get a QAItem from cache
-	  // NOTE: Don't change method name until UI v3 is merged
-	  getError: function getError(id) {
-	    return _cache$1.data[id];
-	  },
+	        _cachedData[which] = result;
+	        return result;
+	      })["catch"](function (err) {
+	        delete _inflight[url];
+	        throw err;
+	      });
+	    }
 
-	  // get the name of the icon to display for this item
-	  getIcon: function getIcon(itemType) {
-	    return _impOsmData.icons[itemType];
-	  },
+	    return prom;
+	  }; // Accessor for the file map
 
-	  // Replace a single QAItem in the cache
-	  replaceItem: function replaceItem(issue) {
-	    if (!(issue instanceof QAItem) || !issue.id) { return; }
 
-	    _cache$1.data[issue.id] = issue;
-	    updateRtree$1(encodeIssueRtree$1(issue), true); // true = replace
-	    return issue;
-	  },
+	  _this.fileMap = function (val) {
+	    if (!arguments.length) return _fileMap;
+	    _fileMap = val;
+	    return _this;
+	  };
 
-	  // Remove a single QAItem from the cache
-	  removeItem: function removeItem(issue) {
-	    if (!(issue instanceof QAItem) || !issue.id) { return; }
+	  var _assetPath = '';
 
-	    delete _cache$1.data[issue.id];
-	    updateRtree$1(encodeIssueRtree$1(issue), false); // false = remove
-	  },
+	  _this.assetPath = function (val) {
+	    if (!arguments.length) return _assetPath;
+	    _assetPath = val;
+	    return _this;
+	  };
 
-	  // Used to populate `closed:improveosm:*` changeset tags
-	  getClosedCounts: function getClosedCounts() {
-	    return _cache$1.closed;
-	  }
-	};
+	  var _assetMap = {};
 
-	var defaults = createCommonjsModule(function (module) {
-	function getDefaults() {
-	  return {
-	    baseUrl: null,
-	    breaks: false,
-	    gfm: true,
-	    headerIds: true,
-	    headerPrefix: '',
-	    highlight: null,
-	    langPrefix: 'language-',
-	    mangle: true,
-	    pedantic: false,
-	    renderer: null,
-	    sanitize: false,
-	    sanitizer: null,
-	    silent: false,
-	    smartLists: false,
-	    smartypants: false,
-	    tokenizer: null,
-	    xhtml: false
-	  };
-	}
-
-	function changeDefaults(newDefaults) {
-	  module.exports.defaults = newDefaults;
-	}
-
-	module.exports = {
-	  defaults: getDefaults(),
-	  getDefaults: getDefaults,
-	  changeDefaults: changeDefaults
-	};
-	});
+	  _this.assetMap = function (val) {
+	    if (!arguments.length) return _assetMap;
+	    _assetMap = val;
+	    return _this;
+	  };
 
-	/**
-	 * Helpers
-	 */
-	var escapeTest = /[&<>"']/;
-	var escapeReplace = /[&<>"']/g;
-	var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
-	var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
-	var escapeReplacements = {
-	  '&': '&amp;',
-	  '<': '&lt;',
-	  '>': '&gt;',
-	  '"': '&quot;',
-	  "'": '&#39;'
-	};
-	var getEscapeReplacement = function (ch) { return escapeReplacements[ch]; };
-	function escape$1(html, encode) {
-	  if (encode) {
-	    if (escapeTest.test(html)) {
-	      return html.replace(escapeReplace, getEscapeReplacement);
-	    }
-	  } else {
-	    if (escapeTestNoEncode.test(html)) {
-	      return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
-	    }
-	  }
+	  _this.asset = function (val) {
+	    if (/^http(s)?:\/\//i.test(val)) return val;
+	    var filename = _assetPath + val;
+	    return _assetMap[filename] || filename;
+	  };
 
-	  return html;
+	  return _this;
 	}
 
-	var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
+	var $findIndex$1 = arrayIteration.findIndex;
 
-	function unescape$1(html) {
-	  // explicitly match decimal, hex, and named HTML entities
-	  return html.replace(unescapeTest, function (_, n) {
-	    n = n.toLowerCase();
-	    if (n === 'colon') { return ':'; }
-	    if (n.charAt(0) === '#') {
-	      return n.charAt(1) === 'x'
-	        ? String.fromCharCode(parseInt(n.substring(2), 16))
-	        : String.fromCharCode(+n.substring(1));
-	    }
-	    return '';
-	  });
-	}
 
-	var caret = /(^|[^\[])\^/g;
-	function edit(regex, opt) {
-	  regex = regex.source || regex;
-	  opt = opt || '';
-	  var obj = {
-	    replace: function (name, val) {
-	      val = val.source || val;
-	      val = val.replace(caret, '$1');
-	      regex = regex.replace(name, val);
-	      return obj;
-	    },
-	    getRegex: function () {
-	      return new RegExp(regex, opt);
-	    }
-	  };
-	  return obj;
-	}
 
-	var nonWordAndColonTest = /[^\w:]/g;
-	var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
-	function cleanUrl(sanitize, base, href) {
-	  if (sanitize) {
-	    var prot;
-	    try {
-	      prot = decodeURIComponent(unescape$1(href))
-	        .replace(nonWordAndColonTest, '')
-	        .toLowerCase();
-	    } catch (e) {
-	      return null;
-	    }
-	    if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
-	      return null;
-	    }
-	  }
-	  if (base && !originIndependentUrl.test(href)) {
-	    href = resolveUrl(base, href);
-	  }
-	  try {
-	    href = encodeURI(href).replace(/%25/g, '%');
-	  } catch (e$1) {
-	    return null;
-	  }
-	  return href;
-	}
+	var FIND_INDEX = 'findIndex';
+	var SKIPS_HOLES$1 = true;
 
-	var baseUrls = {};
-	var justDomain = /^[^:]+:\/*[^/]*$/;
-	var protocol = /^([^:]+:)[\s\S]*$/;
-	var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
+	var USES_TO_LENGTH$b = arrayMethodUsesToLength(FIND_INDEX);
 
-	function resolveUrl(base, href) {
-	  if (!baseUrls[' ' + base]) {
-	    // we can ignore everything in base after the last slash of its path component,
-	    // but we might need to add _that_
-	    // https://tools.ietf.org/html/rfc3986#section-3
-	    if (justDomain.test(base)) {
-	      baseUrls[' ' + base] = base + '/';
-	    } else {
-	      baseUrls[' ' + base] = rtrim(base, '/', true);
-	    }
-	  }
-	  base = baseUrls[' ' + base];
-	  var relativeBase = base.indexOf(':') === -1;
+	// Shouldn't skip holes
+	if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES$1 = false; });
 
-	  if (href.substring(0, 2) === '//') {
-	    if (relativeBase) {
-	      return href;
-	    }
-	    return base.replace(protocol, '$1') + href;
-	  } else if (href.charAt(0) === '/') {
-	    if (relativeBase) {
-	      return href;
-	    }
-	    return base.replace(domain, '$1') + href;
-	  } else {
-	    return base + href;
+	// `Array.prototype.findIndex` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.findindex
+	_export({ target: 'Array', proto: true, forced: SKIPS_HOLES$1 || !USES_TO_LENGTH$b }, {
+	  findIndex: function findIndex(callbackfn /* , that = undefined */) {
+	    return $findIndex$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
 	  }
-	}
+	});
 
-	var noopTest = { exec: function noopTest() {} };
+	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables(FIND_INDEX);
 
-	function merge$1(obj) {
-	  var arguments$1 = arguments;
+	var $includes$1 = arrayIncludes.includes;
 
-	  var i = 1,
-	    target,
-	    key;
 
-	  for (; i < arguments.length; i++) {
-	    target = arguments$1[i];
-	    for (key in target) {
-	      if (Object.prototype.hasOwnProperty.call(target, key)) {
-	        obj[key] = target[key];
-	      }
-	    }
+
+	var USES_TO_LENGTH$c = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });
+
+	// `Array.prototype.includes` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.includes
+	_export({ target: 'Array', proto: true, forced: !USES_TO_LENGTH$c }, {
+	  includes: function includes(el /* , fromIndex = 0 */) {
+	    return $includes$1(this, el, arguments.length > 1 ? arguments[1] : undefined);
 	  }
+	});
 
-	  return obj;
-	}
+	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables('includes');
 
-	function splitCells(tableRow, count) {
-	  // ensure that every cell-delimiting pipe has a space
-	  // before it to distinguish it from an escaped pipe
-	  var row = tableRow.replace(/\|/g, function (match, offset, str) {
-	      var escaped = false,
-	        curr = offset;
-	      while (--curr >= 0 && str[curr] === '\\') { escaped = !escaped; }
-	      if (escaped) {
-	        // odd number of slashes means | is escaped
-	        // so we leave it alone
-	        return '|';
-	      } else {
-	        // add space before unescaped |
-	        return ' |';
-	      }
-	    }),
-	    cells = row.split(/ \|/);
-	  var i = 0;
+	var notARegexp = function (it) {
+	  if (isRegexp(it)) {
+	    throw TypeError("The method doesn't accept regular expressions");
+	  } return it;
+	};
 
-	  if (cells.length > count) {
-	    cells.splice(count);
-	  } else {
-	    while (cells.length < count) { cells.push(''); }
-	  }
+	var MATCH$2 = wellKnownSymbol('match');
 
-	  for (; i < cells.length; i++) {
-	    // leading or trailing whitespace is ignored per the gfm spec
-	    cells[i] = cells[i].trim().replace(/\\\|/g, '|');
+	var correctIsRegexpLogic = function (METHOD_NAME) {
+	  var regexp = /./;
+	  try {
+	    '/./'[METHOD_NAME](regexp);
+	  } catch (e) {
+	    try {
+	      regexp[MATCH$2] = false;
+	      return '/./'[METHOD_NAME](regexp);
+	    } catch (f) { /* empty */ }
+	  } return false;
+	};
+
+	// `String.prototype.includes` method
+	// https://tc39.github.io/ecma262/#sec-string.prototype.includes
+	_export({ target: 'String', proto: true, forced: !correctIsRegexpLogic('includes') }, {
+	  includes: function includes(searchString /* , position = 0 */) {
+	    return !!~String(requireObjectCoercible(this))
+	      .indexOf(notARegexp(searchString), arguments.length > 1 ? arguments[1] : undefined);
 	  }
-	  return cells;
-	}
+	});
 
-	// Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
-	// /c*$/ is vulnerable to REDOS.
-	// invert: Remove suffix of non-c chars instead. Default falsey.
-	function rtrim(str, c, invert) {
-	  var l = str.length;
-	  if (l === 0) {
-	    return '';
+	var _detected;
+
+	function utilDetect(refresh) {
+	  if (_detected && !refresh) return _detected;
+	  _detected = {};
+	  var ua = navigator.userAgent;
+	  var m = null;
+	  /* Browser */
+
+	  m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i); // Edge
+
+	  if (m !== null) {
+	    _detected.browser = m[1];
+	    _detected.version = m[2];
 	  }
 
-	  // Length of suffix matching the invert condition.
-	  var suffLen = 0;
+	  if (!_detected.browser) {
+	    m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i); // IE11
 
-	  // Step left until we fail to match the invert condition.
-	  while (suffLen < l) {
-	    var currChar = str.charAt(l - suffLen - 1);
-	    if (currChar === c && !invert) {
-	      suffLen++;
-	    } else if (currChar !== c && invert) {
-	      suffLen++;
-	    } else {
-	      break;
+	    if (m !== null) {
+	      _detected.browser = 'msie';
+	      _detected.version = m[1];
 	    }
 	  }
 
-	  return str.substr(0, l - suffLen);
-	}
+	  if (!_detected.browser) {
+	    m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i); // Opera 15+
 
-	function findClosingBracket(str, b) {
-	  if (str.indexOf(b[1]) === -1) {
-	    return -1;
+	    if (m !== null) {
+	      _detected.browser = 'Opera';
+	      _detected.version = m[2];
+	    }
 	  }
-	  var l = str.length;
-	  var level = 0,
-	    i = 0;
-	  for (; i < l; i++) {
-	    if (str[i] === '\\') {
-	      i++;
-	    } else if (str[i] === b[0]) {
-	      level++;
-	    } else if (str[i] === b[1]) {
-	      level--;
-	      if (level < 0) {
-	        return i;
-	      }
+
+	  if (!_detected.browser) {
+	    m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
+
+	    if (m !== null) {
+	      _detected.browser = m[1];
+	      _detected.version = m[2];
+	      m = ua.match(/version\/([\.\d]+)/i);
+	      if (m !== null) _detected.version = m[1];
 	    }
 	  }
-	  return -1;
-	}
 
-	function checkSanitizeDeprecation(opt) {
-	  if (opt && opt.sanitize && !opt.silent) {
-	    console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
+	  if (!_detected.browser) {
+	    _detected.browser = navigator.appName;
+	    _detected.version = navigator.appVersion;
+	  } // keep major.minor version only..
+
+
+	  _detected.version = _detected.version.split(/\W/).slice(0, 2).join('.'); // detect other browser capabilities
+	  // Legacy Opera has incomplete svg style support. See #715
+
+	  _detected.opera = _detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15;
+
+	  if (_detected.browser.toLowerCase() === 'msie') {
+	    _detected.ie = true;
+	    _detected.browser = 'Internet Explorer';
+	    _detected.support = parseFloat(_detected.version) >= 11;
+	  } else {
+	    _detected.ie = false;
+	    _detected.support = true;
+	  }
+
+	  _detected.filedrop = window.FileReader && 'ondrop' in window;
+	  _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+	  _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+	  /* Platform */
+
+	  if (/Win/.test(ua)) {
+	    _detected.os = 'win';
+	    _detected.platform = 'Windows';
+	  } else if (/Mac/.test(ua)) {
+	    _detected.os = 'mac';
+	    _detected.platform = 'Macintosh';
+	  } else if (/X11/.test(ua) || /Linux/.test(ua)) {
+	    _detected.os = 'linux';
+	    _detected.platform = 'Linux';
+	  } else {
+	    _detected.os = 'win';
+	    _detected.platform = 'Unknown';
 	  }
-	}
 
-	var helpers = {
-	  escape: escape$1,
-	  unescape: unescape$1,
-	  edit: edit,
-	  cleanUrl: cleanUrl,
-	  resolveUrl: resolveUrl,
-	  noopTest: noopTest,
-	  merge: merge$1,
-	  splitCells: splitCells,
-	  rtrim: rtrim,
-	  findClosingBracket: findClosingBracket,
-	  checkSanitizeDeprecation: checkSanitizeDeprecation
-	};
+	  _detected.isMobileWebKit = (/\b(iPad|iPhone|iPod)\b/.test(ua) || // HACK: iPadOS 13+ requests desktop sites by default by using a Mac user agent,
+	  // so assume any "mac" with multitouch is actually iOS
+	  navigator.platform === 'MacIntel' && 'maxTouchPoints' in navigator && navigator.maxTouchPoints > 1) && /WebKit/.test(ua) && !/Edge/.test(ua) && !window.MSStream;
+	  /* Locale */
+	  // An array of locales requested by the browser in priority order.
 
-	var defaults$1 = defaults.defaults;
-	var rtrim$1 = helpers.rtrim;
-	var splitCells$1 = helpers.splitCells;
-	var escape$2 = helpers.escape;
-	var findClosingBracket$1 = helpers.findClosingBracket;
+	  _detected.browserLocales = Array.from(new Set( // remove duplicates
+	  [navigator.language].concat(navigator.languages || []).concat([// old property for backwards compatibility
+	  navigator.userLanguage]) // remove any undefined values
+	  .filter(Boolean)));
+	  /* Host */
 
-	function outputLink(cap, link, raw) {
-	  var href = link.href;
-	  var title = link.title ? escape$2(link.title) : null;
+	  var loc = window.top.location;
+	  var origin = loc.origin;
 
-	  if (cap[0].charAt(0) !== '!') {
-	    return {
-	      type: 'link',
-	      raw: raw,
-	      href: href,
-	      title: title,
-	      text: cap[1]
-	    };
-	  } else {
-	    return {
-	      type: 'image',
-	      raw: raw,
-	      text: escape$2(cap[1]),
-	      href: href,
-	      title: title
-	    };
+	  if (!origin) {
+	    // for unpatched IE11
+	    origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port : '');
 	  }
-	}
 
-	/**
-	 * Tokenizer
-	 */
-	var Tokenizer_1 = /*@__PURE__*/(function () {
-	  function Tokenizer(options) {
-	    this.options = options || defaults$1;
-	  }
+	  _detected.host = origin + loc.pathname;
+	  return _detected;
+	}
 
-	  Tokenizer.prototype.space = function space (src) {
-	    var cap = this.rules.block.newline.exec(src);
-	    if (cap) {
-	      if (cap[0].length > 1) {
-	        return {
-	          type: 'space',
-	          raw: cap[0]
-	        };
+	var getOwnPropertyNames$2 = objectGetOwnPropertyNames.f;
+	var getOwnPropertyDescriptor$3 = objectGetOwnPropertyDescriptor.f;
+	var defineProperty$a = objectDefineProperty.f;
+	var trim$2 = stringTrim.trim;
+
+	var NUMBER = 'Number';
+	var NativeNumber = global_1[NUMBER];
+	var NumberPrototype = NativeNumber.prototype;
+
+	// Opera ~12 has broken Object#toString
+	var BROKEN_CLASSOF = classofRaw(objectCreate(NumberPrototype)) == NUMBER;
+
+	// `ToNumber` abstract operation
+	// https://tc39.github.io/ecma262/#sec-tonumber
+	var toNumber = function (argument) {
+	  var it = toPrimitive(argument, false);
+	  var first, third, radix, maxCode, digits, length, index, code;
+	  if (typeof it == 'string' && it.length > 2) {
+	    it = trim$2(it);
+	    first = it.charCodeAt(0);
+	    if (first === 43 || first === 45) {
+	      third = it.charCodeAt(2);
+	      if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix
+	    } else if (first === 48) {
+	      switch (it.charCodeAt(1)) {
+	        case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i
+	        case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i
+	        default: return +it;
 	      }
-	      return { raw: '\n' };
+	      digits = it.slice(2);
+	      length = digits.length;
+	      for (index = 0; index < length; index++) {
+	        code = digits.charCodeAt(index);
+	        // parseInt parses a string to a first unavailable symbol
+	        // but ToNumber should return NaN if a string contains unavailable symbols
+	        if (code < 48 || code > maxCode) return NaN;
+	      } return parseInt(digits, radix);
+	    }
+	  } return +it;
+	};
+
+	// `Number` constructor
+	// https://tc39.github.io/ecma262/#sec-number-constructor
+	if (isForced_1(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {
+	  var NumberWrapper = function Number(value) {
+	    var it = arguments.length < 1 ? 0 : value;
+	    var dummy = this;
+	    return dummy instanceof NumberWrapper
+	      // check on 1..constructor(foo) case
+	      && (BROKEN_CLASSOF ? fails(function () { NumberPrototype.valueOf.call(dummy); }) : classofRaw(dummy) != NUMBER)
+	        ? inheritIfRequired(new NativeNumber(toNumber(it)), dummy, NumberWrapper) : toNumber(it);
+	  };
+	  for (var keys$3 = descriptors ? getOwnPropertyNames$2(NativeNumber) : (
+	    // ES3:
+	    'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +
+	    // ES2015 (in case, if modules with ES2015 Number statics required before):
+	    'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +
+	    'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger'
+	  ).split(','), j$2 = 0, key$1; keys$3.length > j$2; j$2++) {
+	    if (has(NativeNumber, key$1 = keys$3[j$2]) && !has(NumberWrapper, key$1)) {
+	      defineProperty$a(NumberWrapper, key$1, getOwnPropertyDescriptor$3(NativeNumber, key$1));
+	    }
+	  }
+	  NumberWrapper.prototype = NumberPrototype;
+	  NumberPrototype.constructor = NumberWrapper;
+	  redefine(global_1, NUMBER, NumberWrapper);
+	}
+
+	// `Number.MAX_SAFE_INTEGER` constant
+	// https://tc39.github.io/ecma262/#sec-number.max_safe_integer
+	_export({ target: 'Number', stat: true }, {
+	  MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF
+	});
+
+	var aesJs = createCommonjsModule(function (module, exports) {
+	  /*! MIT License. Copyright 2015-2018 Richard Moore <me@ricmoo.com>. See LICENSE.txt. */
+	  (function (root) {
+
+	    function checkInt(value) {
+	      return parseInt(value) === value;
 	    }
-	  };
 
-	  Tokenizer.prototype.code = function code (src, tokens) {
-	    var cap = this.rules.block.code.exec(src);
-	    if (cap) {
-	      var lastToken = tokens[tokens.length - 1];
-	      // An indented code block cannot interrupt a paragraph.
-	      if (lastToken && lastToken.type === 'paragraph') {
-	        tokens.pop();
-	        lastToken.text += '\n' + cap[0].trimRight();
-	        lastToken.raw += '\n' + cap[0];
-	        return lastToken;
-	      } else {
-	        var text = cap[0].replace(/^ {4}/gm, '');
-	        return {
-	          type: 'code',
-	          raw: cap[0],
-	          codeBlockStyle: 'indented',
-	          text: !this.options.pedantic
-	            ? rtrim$1(text, '\n')
-	            : text
-	        };
+	    function checkInts(arrayish) {
+	      if (!checkInt(arrayish.length)) {
+	        return false;
 	      }
-	    }
-	  };
 
-	  Tokenizer.prototype.fences = function fences (src) {
-	    var cap = this.rules.block.fences.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'code',
-	        raw: cap[0],
-	        lang: cap[2] ? cap[2].trim() : cap[2],
-	        text: cap[3] || ''
-	      };
-	    }
-	  };
+	      for (var i = 0; i < arrayish.length; i++) {
+	        if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
+	          return false;
+	        }
+	      }
 
-	  Tokenizer.prototype.heading = function heading (src) {
-	    var cap = this.rules.block.heading.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'heading',
-	        raw: cap[0],
-	        depth: cap[1].length,
-	        text: cap[2]
-	      };
+	      return true;
 	    }
-	  };
-
-	  Tokenizer.prototype.nptable = function nptable (src) {
-	    var cap = this.rules.block.nptable.exec(src);
-	    if (cap) {
-	      var item = {
-	        type: 'table',
-	        header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
-	        align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
-	        cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
-	        raw: cap[0]
-	      };
 
-	      if (item.header.length === item.align.length) {
-	        var l = item.align.length;
-	        var i;
-	        for (i = 0; i < l; i++) {
-	          if (/^ *-+: *$/.test(item.align[i])) {
-	            item.align[i] = 'right';
-	          } else if (/^ *:-+: *$/.test(item.align[i])) {
-	            item.align[i] = 'center';
-	          } else if (/^ *:-+ *$/.test(item.align[i])) {
-	            item.align[i] = 'left';
+	    function coerceArray(arg, copy) {
+	      // ArrayBuffer view
+	      if (arg.buffer && arg.name === 'Uint8Array') {
+	        if (copy) {
+	          if (arg.slice) {
+	            arg = arg.slice();
 	          } else {
-	            item.align[i] = null;
+	            arg = Array.prototype.slice.call(arg);
 	          }
 	        }
 
-	        l = item.cells.length;
-	        for (i = 0; i < l; i++) {
-	          item.cells[i] = splitCells$1(item.cells[i], item.header.length);
+	        return arg;
+	      } // It's an array; check it is a valid representation of a byte
+
+
+	      if (Array.isArray(arg)) {
+	        if (!checkInts(arg)) {
+	          throw new Error('Array contains invalid value: ' + arg);
 	        }
 
-	        return item;
+	        return new Uint8Array(arg);
+	      } // Something else, but behaves like an array (maybe a Buffer? Arguments?)
+
+
+	      if (checkInt(arg.length) && checkInts(arg)) {
+	        return new Uint8Array(arg);
 	      }
+
+	      throw new Error('unsupported array-like object');
 	    }
-	  };
 
-	  Tokenizer.prototype.hr = function hr (src) {
-	    var cap = this.rules.block.hr.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'hr',
-	        raw: cap[0]
-	      };
+	    function createArray(length) {
+	      return new Uint8Array(length);
 	    }
-	  };
 
-	  Tokenizer.prototype.blockquote = function blockquote (src) {
-	    var cap = this.rules.block.blockquote.exec(src);
-	    if (cap) {
-	      var text = cap[0].replace(/^ *> ?/gm, '');
+	    function copyArray(sourceArray, targetArray, targetStart, sourceStart, sourceEnd) {
+	      if (sourceStart != null || sourceEnd != null) {
+	        if (sourceArray.slice) {
+	          sourceArray = sourceArray.slice(sourceStart, sourceEnd);
+	        } else {
+	          sourceArray = Array.prototype.slice.call(sourceArray, sourceStart, sourceEnd);
+	        }
+	      }
 
-	      return {
-	        type: 'blockquote',
-	        raw: cap[0],
-	        text: text
-	      };
+	      targetArray.set(sourceArray, targetStart);
 	    }
-	  };
 
-	  Tokenizer.prototype.list = function list (src) {
-	    var cap = this.rules.block.list.exec(src);
-	    if (cap) {
-	      var raw = cap[0];
-	      var bull = cap[2];
-	      var isordered = bull.length > 1;
+	    var convertUtf8 = function () {
+	      function toBytes(text) {
+	        var result = [],
+	            i = 0;
+	        text = encodeURI(text);
 
-	      var list = {
-	        type: 'list',
-	        raw: raw,
-	        ordered: isordered,
-	        start: isordered ? +bull : '',
-	        loose: false,
-	        items: []
-	      };
+	        while (i < text.length) {
+	          var c = text.charCodeAt(i++); // if it is a % sign, encode the following 2 bytes as a hex value
 
-	      // Get each top-level item.
-	      var itemMatch = cap[0].match(this.rules.block.item);
-
-	      var next = false,
-	        item,
-	        space,
-	        b,
-	        addBack,
-	        loose,
-	        istask,
-	        ischecked;
-
-	      var l = itemMatch.length;
-	      for (var i = 0; i < l; i++) {
-	        item = itemMatch[i];
-	        raw = item;
-
-	        // Remove the list item's bullet
-	        // so it is seen as the next token.
-	        space = item.length;
-	        item = item.replace(/^ *([*+-]|\d+\.) */, '');
-
-	        // Outdent whatever the
-	        // list item contains. Hacky.
-	        if (~item.indexOf('\n ')) {
-	          space -= item.length;
-	          item = !this.options.pedantic
-	            ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '')
-	            : item.replace(/^ {1,4}/gm, '');
-	        }
-
-	        // Determine whether the next list item belongs here.
-	        // Backpedal if it does not belong in this list.
-	        if (i !== l - 1) {
-	          b = this.rules.block.bullet.exec(itemMatch[i + 1])[0];
-	          if (bull.length > 1 ? b.length === 1
-	            : (b.length > 1 || (this.options.smartLists && b !== bull))) {
-	            addBack = itemMatch.slice(i + 1).join('\n');
-	            list.raw = list.raw.substring(0, list.raw.length - addBack.length);
-	            i = l - 1;
+	          if (c === 37) {
+	            result.push(parseInt(text.substr(i, 2), 16));
+	            i += 2; // otherwise, just the actual byte
+	          } else {
+	            result.push(c);
 	          }
 	        }
 
-	        // Determine whether item is loose or not.
-	        // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
-	        // for discount behavior.
-	        loose = next || /\n\n(?!\s*$)/.test(item);
-	        if (i !== l - 1) {
-	          next = item.charAt(item.length - 1) === '\n';
-	          if (!loose) { loose = next; }
-	        }
-
-	        if (loose) {
-	          list.loose = true;
-	        }
-
-	        // Check for task list items
-	        istask = /^\[[ xX]\] /.test(item);
-	        ischecked = undefined;
-	        if (istask) {
-	          ischecked = item[1] !== ' ';
-	          item = item.replace(/^\[[ xX]\] +/, '');
-	        }
-
-	        list.items.push({
-	          raw: raw,
-	          task: istask,
-	          checked: ischecked,
-	          loose: loose,
-	          text: item
-	        });
+	        return coerceArray(result);
 	      }
 
-	      return list;
-	    }
-	  };
-
-	  Tokenizer.prototype.html = function html (src) {
-	    var cap = this.rules.block.html.exec(src);
-	    if (cap) {
-	      return {
-	        type: this.options.sanitize
-	          ? 'paragraph'
-	          : 'html',
-	        raw: cap[0],
-	        pre: !this.options.sanitizer
-	          && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
-	        text: this.options.sanitize ? (this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape$2(cap[0])) : cap[0]
-	      };
-	    }
-	  };
-
-	  Tokenizer.prototype.def = function def (src) {
-	    var cap = this.rules.block.def.exec(src);
-	    if (cap) {
-	      if (cap[3]) { cap[3] = cap[3].substring(1, cap[3].length - 1); }
-	      var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
-	      return {
-	        tag: tag,
-	        raw: cap[0],
-	        href: cap[2],
-	        title: cap[3]
-	      };
-	    }
-	  };
-
-	  Tokenizer.prototype.table = function table (src) {
-	    var cap = this.rules.block.table.exec(src);
-	    if (cap) {
-	      var item = {
-	        type: 'table',
-	        header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
-	        align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
-	        cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
-	      };
+	      function fromBytes(bytes) {
+	        var result = [],
+	            i = 0;
 
-	      if (item.header.length === item.align.length) {
-	        item.raw = cap[0];
+	        while (i < bytes.length) {
+	          var c = bytes[i];
 
-	        var l = item.align.length;
-	        var i;
-	        for (i = 0; i < l; i++) {
-	          if (/^ *-+: *$/.test(item.align[i])) {
-	            item.align[i] = 'right';
-	          } else if (/^ *:-+: *$/.test(item.align[i])) {
-	            item.align[i] = 'center';
-	          } else if (/^ *:-+ *$/.test(item.align[i])) {
-	            item.align[i] = 'left';
+	          if (c < 128) {
+	            result.push(String.fromCharCode(c));
+	            i++;
+	          } else if (c > 191 && c < 224) {
+	            result.push(String.fromCharCode((c & 0x1f) << 6 | bytes[i + 1] & 0x3f));
+	            i += 2;
 	          } else {
-	            item.align[i] = null;
+	            result.push(String.fromCharCode((c & 0x0f) << 12 | (bytes[i + 1] & 0x3f) << 6 | bytes[i + 2] & 0x3f));
+	            i += 3;
 	          }
 	        }
 
-	        l = item.cells.length;
-	        for (i = 0; i < l; i++) {
-	          item.cells[i] = splitCells$1(
-	            item.cells[i].replace(/^ *\| *| *\| *$/g, ''),
-	            item.header.length);
-	        }
-
-	        return item;
+	        return result.join('');
 	      }
-	    }
-	  };
 
-	  Tokenizer.prototype.lheading = function lheading (src) {
-	    var cap = this.rules.block.lheading.exec(src);
-	    if (cap) {
 	      return {
-	        type: 'heading',
-	        raw: cap[0],
-	        depth: cap[2].charAt(0) === '=' ? 1 : 2,
-	        text: cap[1]
+	        toBytes: toBytes,
+	        fromBytes: fromBytes
 	      };
-	    }
-	  };
+	    }();
 
-	  Tokenizer.prototype.paragraph = function paragraph (src) {
-	    var cap = this.rules.block.paragraph.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'paragraph',
-	        raw: cap[0],
-	        text: cap[1].charAt(cap[1].length - 1) === '\n'
-	          ? cap[1].slice(0, -1)
-	          : cap[1]
-	      };
-	    }
-	  };
+	    var convertHex = function () {
+	      function toBytes(text) {
+	        var result = [];
 
-	  Tokenizer.prototype.text = function text (src) {
-	    var cap = this.rules.block.text.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'text',
-	        raw: cap[0],
-	        text: cap[0]
-	      };
-	    }
-	  };
+	        for (var i = 0; i < text.length; i += 2) {
+	          result.push(parseInt(text.substr(i, 2), 16));
+	        }
 
-	  Tokenizer.prototype.escape = function escape$1 (src) {
-	    var cap = this.rules.inline.escape.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'escape',
-	        raw: cap[0],
-	        text: escape$2(cap[1])
-	      };
-	    }
-	  };
+	        return result;
+	      } // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
 
-	  Tokenizer.prototype.tag = function tag (src, inLink, inRawBlock) {
-	    var cap = this.rules.inline.tag.exec(src);
-	    if (cap) {
-	      if (!inLink && /^<a /i.test(cap[0])) {
-	        inLink = true;
-	      } else if (inLink && /^<\/a>/i.test(cap[0])) {
-	        inLink = false;
-	      }
-	      if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
-	        inRawBlock = true;
-	      } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
-	        inRawBlock = false;
-	      }
 
-	      return {
-	        type: this.options.sanitize
-	          ? 'text'
-	          : 'html',
-	        raw: cap[0],
-	        inLink: inLink,
-	        inRawBlock: inRawBlock,
-	        text: this.options.sanitize
-	          ? (this.options.sanitizer
-	            ? this.options.sanitizer(cap[0])
-	            : escape$2(cap[0]))
-	          : cap[0]
-	      };
-	    }
-	  };
+	      var Hex = '0123456789abcdef';
 
-	  Tokenizer.prototype.link = function link (src) {
-	    var cap = this.rules.inline.link.exec(src);
-	    if (cap) {
-	      var lastParenIndex = findClosingBracket$1(cap[2], '()');
-	      if (lastParenIndex > -1) {
-	        var start = cap[0].indexOf('!') === 0 ? 5 : 4;
-	        var linkLen = start + cap[1].length + lastParenIndex;
-	        cap[2] = cap[2].substring(0, lastParenIndex);
-	        cap[0] = cap[0].substring(0, linkLen).trim();
-	        cap[3] = '';
-	      }
-	      var href = cap[2];
-	      var title = '';
-	      if (this.options.pedantic) {
-	        var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
+	      function fromBytes(bytes) {
+	        var result = [];
 
-	        if (link) {
-	          href = link[1];
-	          title = link[3];
-	        } else {
-	          title = '';
+	        for (var i = 0; i < bytes.length; i++) {
+	          var v = bytes[i];
+	          result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
 	        }
-	      } else {
-	        title = cap[3] ? cap[3].slice(1, -1) : '';
-	      }
-	      href = href.trim().replace(/^<([\s\S]*)>$/, '$1');
-	      var token = outputLink(cap, {
-	        href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
-	        title: title ? title.replace(this.rules.inline._escapes, '$1') : title
-	      }, cap[0]);
-	      return token;
-	    }
-	  };
 
-	  Tokenizer.prototype.reflink = function reflink (src, links) {
-	    var cap;
-	    if ((cap = this.rules.inline.reflink.exec(src))
-	        || (cap = this.rules.inline.nolink.exec(src))) {
-	      var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
-	      link = links[link.toLowerCase()];
-	      if (!link || !link.href) {
-	        var text = cap[0].charAt(0);
-	        return {
-	          type: 'text',
-	          raw: text,
-	          text: text
-	        };
+	        return result.join('');
 	      }
-	      var token = outputLink(cap, link, cap[0]);
-	      return token;
-	    }
-	  };
 
-	  Tokenizer.prototype.strong = function strong (src) {
-	    var cap = this.rules.inline.strong.exec(src);
-	    if (cap) {
 	      return {
-	        type: 'strong',
-	        raw: cap[0],
-	        text: cap[4] || cap[3] || cap[2] || cap[1]
+	        toBytes: toBytes,
+	        fromBytes: fromBytes
 	      };
-	    }
-	  };
+	    }(); // Number of rounds by keysize
 
-	  Tokenizer.prototype.em = function em (src) {
-	    var cap = this.rules.inline.em.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'em',
-	        raw: cap[0],
-	        text: cap[6] || cap[5] || cap[4] || cap[3] || cap[2] || cap[1]
-	      };
-	    }
-	  };
 
-	  Tokenizer.prototype.codespan = function codespan (src) {
-	    var cap = this.rules.inline.code.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'codespan',
-	        raw: cap[0],
-	        text: escape$2(cap[2].trim(), true)
-	      };
-	    }
-	  };
+	    var numberOfRounds = {
+	      16: 10,
+	      24: 12,
+	      32: 14
+	    }; // Round constant words
 
-	  Tokenizer.prototype.br = function br (src) {
-	    var cap = this.rules.inline.br.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'br',
-	        raw: cap[0]
-	      };
-	    }
-	  };
+	    var rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91]; // S-box and Inverse S-box (S is for Substitution)
 
-	  Tokenizer.prototype.del = function del (src) {
-	    var cap = this.rules.inline.del.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'del',
-	        raw: cap[0],
-	        text: cap[1]
-	      };
-	    }
-	  };
+	    var S = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16];
+	    var Si = [0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d]; // Transformations for encryption
 
-	  Tokenizer.prototype.autolink = function autolink (src, mangle) {
-	    var cap = this.rules.inline.autolink.exec(src);
-	    if (cap) {
-	      var text, href;
-	      if (cap[2] === '@') {
-	        text = escape$2(this.options.mangle ? mangle(cap[1]) : cap[1]);
-	        href = 'mailto:' + text;
-	      } else {
-	        text = escape$2(cap[1]);
-	        href = text;
-	      }
+	    var T1 = [0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a];
+	    var T2 = [0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616];
+	    var T3 = [0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16];
+	    var T4 = [0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c]; // Transformations for decryption
 
-	      return {
-	        type: 'link',
-	        raw: cap[0],
-	        text: text,
-	        href: href,
-	        tokens: [
-	          {
-	            type: 'text',
-	            raw: text,
-	            text: text
-	          }
-	        ]
-	      };
-	    }
-	  };
+	    var T5 = [0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742];
+	    var T6 = [0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857];
+	    var T7 = [0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8];
+	    var T8 = [0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0]; // Transformations for decryption key expansion
 
-	  Tokenizer.prototype.url = function url (src, mangle) {
-	    var cap;
-	    if (cap = this.rules.inline.url.exec(src)) {
-	      var text, href;
-	      if (cap[2] === '@') {
-	        text = escape$2(this.options.mangle ? mangle(cap[0]) : cap[0]);
-	        href = 'mailto:' + text;
-	      } else {
-	        // do extended autolink path validation
-	        var prevCapZero;
-	        do {
-	          prevCapZero = cap[0];
-	          cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
-	        } while (prevCapZero !== cap[0]);
-	        text = escape$2(cap[0]);
-	        if (cap[1] === 'www.') {
-	          href = 'http://' + text;
-	        } else {
-	          href = text;
-	        }
-	      }
-	      return {
-	        type: 'link',
-	        raw: cap[0],
-	        text: text,
-	        href: href,
-	        tokens: [
-	          {
-	            type: 'text',
-	            raw: text,
-	            text: text
-	          }
-	        ]
-	      };
-	    }
-	  };
+	    var U1 = [0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3];
+	    var U2 = [0x00000000, 0x0b0e090d, 0x161c121a, 0x1d121b17, 0x2c382434, 0x27362d39, 0x3a24362e, 0x312a3f23, 0x58704868, 0x537e4165, 0x4e6c5a72, 0x4562537f, 0x74486c5c, 0x7f466551, 0x62547e46, 0x695a774b, 0xb0e090d0, 0xbbee99dd, 0xa6fc82ca, 0xadf28bc7, 0x9cd8b4e4, 0x97d6bde9, 0x8ac4a6fe, 0x81caaff3, 0xe890d8b8, 0xe39ed1b5, 0xfe8ccaa2, 0xf582c3af, 0xc4a8fc8c, 0xcfa6f581, 0xd2b4ee96, 0xd9bae79b, 0x7bdb3bbb, 0x70d532b6, 0x6dc729a1, 0x66c920ac, 0x57e31f8f, 0x5ced1682, 0x41ff0d95, 0x4af10498, 0x23ab73d3, 0x28a57ade, 0x35b761c9, 0x3eb968c4, 0x0f9357e7, 0x049d5eea, 0x198f45fd, 0x12814cf0, 0xcb3bab6b, 0xc035a266, 0xdd27b971, 0xd629b07c, 0xe7038f5f, 0xec0d8652, 0xf11f9d45, 0xfa119448, 0x934be303, 0x9845ea0e, 0x8557f119, 0x8e59f814, 0xbf73c737, 0xb47dce3a, 0xa96fd52d, 0xa261dc20, 0xf6ad766d, 0xfda37f60, 0xe0b16477, 0xebbf6d7a, 0xda955259, 0xd19b5b54, 0xcc894043, 0xc787494e, 0xaedd3e05, 0xa5d33708, 0xb8c12c1f, 0xb3cf2512, 0x82e51a31, 0x89eb133c, 0x94f9082b, 0x9ff70126, 0x464de6bd, 0x4d43efb0, 0x5051f4a7, 0x5b5ffdaa, 0x6a75c289, 0x617bcb84, 0x7c69d093, 0x7767d99e, 0x1e3daed5, 0x1533a7d8, 0x0821bccf, 0x032fb5c2, 0x32058ae1, 0x390b83ec, 0x241998fb, 0x2f1791f6, 0x8d764dd6, 0x867844db, 0x9b6a5fcc, 0x906456c1, 0xa14e69e2, 0xaa4060ef, 0xb7527bf8, 0xbc5c72f5, 0xd50605be, 0xde080cb3, 0xc31a17a4, 0xc8141ea9, 0xf93e218a, 0xf2302887, 0xef223390, 0xe42c3a9d, 0x3d96dd06, 0x3698d40b, 0x2b8acf1c, 0x2084c611, 0x11aef932, 0x1aa0f03f, 0x07b2eb28, 0x0cbce225, 0x65e6956e, 0x6ee89c63, 0x73fa8774, 0x78f48e79, 0x49deb15a, 0x42d0b857, 0x5fc2a340, 0x54ccaa4d, 0xf741ecda, 0xfc4fe5d7, 0xe15dfec0, 0xea53f7cd, 0xdb79c8ee, 0xd077c1e3, 0xcd65daf4, 0xc66bd3f9, 0xaf31a4b2, 0xa43fadbf, 0xb92db6a8, 0xb223bfa5, 0x83098086, 0x8807898b, 0x9515929c, 0x9e1b9b91, 0x47a17c0a, 0x4caf7507, 0x51bd6e10, 0x5ab3671d, 0x6b99583e, 0x60975133, 0x7d854a24, 0x768b4329, 0x1fd13462, 0x14df3d6f, 0x09cd2678, 0x02c32f75, 0x33e91056, 0x38e7195b, 0x25f5024c, 0x2efb0b41, 0x8c9ad761, 0x8794de6c, 0x9a86c57b, 0x9188cc76, 0xa0a2f355, 0xabacfa58, 0xb6bee14f, 0xbdb0e842, 0xd4ea9f09, 0xdfe49604, 0xc2f68d13, 0xc9f8841e, 0xf8d2bb3d, 0xf3dcb230, 0xeecea927, 0xe5c0a02a, 0x3c7a47b1, 0x37744ebc, 0x2a6655ab, 0x21685ca6, 0x10426385, 0x1b4c6a88, 0x065e719f, 0x0d507892, 0x640a0fd9, 0x6f0406d4, 0x72161dc3, 0x791814ce, 0x48322bed, 0x433c22e0, 0x5e2e39f7, 0x552030fa, 0x01ec9ab7, 0x0ae293ba, 0x17f088ad, 0x1cfe81a0, 0x2dd4be83, 0x26dab78e, 0x3bc8ac99, 0x30c6a594, 0x599cd2df, 0x5292dbd2, 0x4f80c0c5, 0x448ec9c8, 0x75a4f6eb, 0x7eaaffe6, 0x63b8e4f1, 0x68b6edfc, 0xb10c0a67, 0xba02036a, 0xa710187d, 0xac1e1170, 0x9d342e53, 0x963a275e, 0x8b283c49, 0x80263544, 0xe97c420f, 0xe2724b02, 0xff605015, 0xf46e5918, 0xc544663b, 0xce4a6f36, 0xd3587421, 0xd8567d2c, 0x7a37a10c, 0x7139a801, 0x6c2bb316, 0x6725ba1b, 0x560f8538, 0x5d018c35, 0x40139722, 0x4b1d9e2f, 0x2247e964, 0x2949e069, 0x345bfb7e, 0x3f55f273, 0x0e7fcd50, 0x0571c45d, 0x1863df4a, 0x136dd647, 0xcad731dc, 0xc1d938d1, 0xdccb23c6, 0xd7c52acb, 0xe6ef15e8, 0xede11ce5, 0xf0f307f2, 0xfbfd0eff, 0x92a779b4, 0x99a970b9, 0x84bb6bae, 0x8fb562a3, 0xbe9f5d80, 0xb591548d, 0xa8834f9a, 0xa38d4697];
+	    var U3 = [0x00000000, 0x0d0b0e09, 0x1a161c12, 0x171d121b, 0x342c3824, 0x3927362d, 0x2e3a2436, 0x23312a3f, 0x68587048, 0x65537e41, 0x724e6c5a, 0x7f456253, 0x5c74486c, 0x517f4665, 0x4662547e, 0x4b695a77, 0xd0b0e090, 0xddbbee99, 0xcaa6fc82, 0xc7adf28b, 0xe49cd8b4, 0xe997d6bd, 0xfe8ac4a6, 0xf381caaf, 0xb8e890d8, 0xb5e39ed1, 0xa2fe8cca, 0xaff582c3, 0x8cc4a8fc, 0x81cfa6f5, 0x96d2b4ee, 0x9bd9bae7, 0xbb7bdb3b, 0xb670d532, 0xa16dc729, 0xac66c920, 0x8f57e31f, 0x825ced16, 0x9541ff0d, 0x984af104, 0xd323ab73, 0xde28a57a, 0xc935b761, 0xc43eb968, 0xe70f9357, 0xea049d5e, 0xfd198f45, 0xf012814c, 0x6bcb3bab, 0x66c035a2, 0x71dd27b9, 0x7cd629b0, 0x5fe7038f, 0x52ec0d86, 0x45f11f9d, 0x48fa1194, 0x03934be3, 0x0e9845ea, 0x198557f1, 0x148e59f8, 0x37bf73c7, 0x3ab47dce, 0x2da96fd5, 0x20a261dc, 0x6df6ad76, 0x60fda37f, 0x77e0b164, 0x7aebbf6d, 0x59da9552, 0x54d19b5b, 0x43cc8940, 0x4ec78749, 0x05aedd3e, 0x08a5d337, 0x1fb8c12c, 0x12b3cf25, 0x3182e51a, 0x3c89eb13, 0x2b94f908, 0x269ff701, 0xbd464de6, 0xb04d43ef, 0xa75051f4, 0xaa5b5ffd, 0x896a75c2, 0x84617bcb, 0x937c69d0, 0x9e7767d9, 0xd51e3dae, 0xd81533a7, 0xcf0821bc, 0xc2032fb5, 0xe132058a, 0xec390b83, 0xfb241998, 0xf62f1791, 0xd68d764d, 0xdb867844, 0xcc9b6a5f, 0xc1906456, 0xe2a14e69, 0xefaa4060, 0xf8b7527b, 0xf5bc5c72, 0xbed50605, 0xb3de080c, 0xa4c31a17, 0xa9c8141e, 0x8af93e21, 0x87f23028, 0x90ef2233, 0x9de42c3a, 0x063d96dd, 0x0b3698d4, 0x1c2b8acf, 0x112084c6, 0x3211aef9, 0x3f1aa0f0, 0x2807b2eb, 0x250cbce2, 0x6e65e695, 0x636ee89c, 0x7473fa87, 0x7978f48e, 0x5a49deb1, 0x5742d0b8, 0x405fc2a3, 0x4d54ccaa, 0xdaf741ec, 0xd7fc4fe5, 0xc0e15dfe, 0xcdea53f7, 0xeedb79c8, 0xe3d077c1, 0xf4cd65da, 0xf9c66bd3, 0xb2af31a4, 0xbfa43fad, 0xa8b92db6, 0xa5b223bf, 0x86830980, 0x8b880789, 0x9c951592, 0x919e1b9b, 0x0a47a17c, 0x074caf75, 0x1051bd6e, 0x1d5ab367, 0x3e6b9958, 0x33609751, 0x247d854a, 0x29768b43, 0x621fd134, 0x6f14df3d, 0x7809cd26, 0x7502c32f, 0x5633e910, 0x5b38e719, 0x4c25f502, 0x412efb0b, 0x618c9ad7, 0x6c8794de, 0x7b9a86c5, 0x769188cc, 0x55a0a2f3, 0x58abacfa, 0x4fb6bee1, 0x42bdb0e8, 0x09d4ea9f, 0x04dfe496, 0x13c2f68d, 0x1ec9f884, 0x3df8d2bb, 0x30f3dcb2, 0x27eecea9, 0x2ae5c0a0, 0xb13c7a47, 0xbc37744e, 0xab2a6655, 0xa621685c, 0x85104263, 0x881b4c6a, 0x9f065e71, 0x920d5078, 0xd9640a0f, 0xd46f0406, 0xc372161d, 0xce791814, 0xed48322b, 0xe0433c22, 0xf75e2e39, 0xfa552030, 0xb701ec9a, 0xba0ae293, 0xad17f088, 0xa01cfe81, 0x832dd4be, 0x8e26dab7, 0x993bc8ac, 0x9430c6a5, 0xdf599cd2, 0xd25292db, 0xc54f80c0, 0xc8448ec9, 0xeb75a4f6, 0xe67eaaff, 0xf163b8e4, 0xfc68b6ed, 0x67b10c0a, 0x6aba0203, 0x7da71018, 0x70ac1e11, 0x539d342e, 0x5e963a27, 0x498b283c, 0x44802635, 0x0fe97c42, 0x02e2724b, 0x15ff6050, 0x18f46e59, 0x3bc54466, 0x36ce4a6f, 0x21d35874, 0x2cd8567d, 0x0c7a37a1, 0x017139a8, 0x166c2bb3, 0x1b6725ba, 0x38560f85, 0x355d018c, 0x22401397, 0x2f4b1d9e, 0x642247e9, 0x692949e0, 0x7e345bfb, 0x733f55f2, 0x500e7fcd, 0x5d0571c4, 0x4a1863df, 0x47136dd6, 0xdccad731, 0xd1c1d938, 0xc6dccb23, 0xcbd7c52a, 0xe8e6ef15, 0xe5ede11c, 0xf2f0f307, 0xfffbfd0e, 0xb492a779, 0xb999a970, 0xae84bb6b, 0xa38fb562, 0x80be9f5d, 0x8db59154, 0x9aa8834f, 0x97a38d46];
+	    var U4 = [0x00000000, 0x090d0b0e, 0x121a161c, 0x1b171d12, 0x24342c38, 0x2d392736, 0x362e3a24, 0x3f23312a, 0x48685870, 0x4165537e, 0x5a724e6c, 0x537f4562, 0x6c5c7448, 0x65517f46, 0x7e466254, 0x774b695a, 0x90d0b0e0, 0x99ddbbee, 0x82caa6fc, 0x8bc7adf2, 0xb4e49cd8, 0xbde997d6, 0xa6fe8ac4, 0xaff381ca, 0xd8b8e890, 0xd1b5e39e, 0xcaa2fe8c, 0xc3aff582, 0xfc8cc4a8, 0xf581cfa6, 0xee96d2b4, 0xe79bd9ba, 0x3bbb7bdb, 0x32b670d5, 0x29a16dc7, 0x20ac66c9, 0x1f8f57e3, 0x16825ced, 0x0d9541ff, 0x04984af1, 0x73d323ab, 0x7ade28a5, 0x61c935b7, 0x68c43eb9, 0x57e70f93, 0x5eea049d, 0x45fd198f, 0x4cf01281, 0xab6bcb3b, 0xa266c035, 0xb971dd27, 0xb07cd629, 0x8f5fe703, 0x8652ec0d, 0x9d45f11f, 0x9448fa11, 0xe303934b, 0xea0e9845, 0xf1198557, 0xf8148e59, 0xc737bf73, 0xce3ab47d, 0xd52da96f, 0xdc20a261, 0x766df6ad, 0x7f60fda3, 0x6477e0b1, 0x6d7aebbf, 0x5259da95, 0x5b54d19b, 0x4043cc89, 0x494ec787, 0x3e05aedd, 0x3708a5d3, 0x2c1fb8c1, 0x2512b3cf, 0x1a3182e5, 0x133c89eb, 0x082b94f9, 0x01269ff7, 0xe6bd464d, 0xefb04d43, 0xf4a75051, 0xfdaa5b5f, 0xc2896a75, 0xcb84617b, 0xd0937c69, 0xd99e7767, 0xaed51e3d, 0xa7d81533, 0xbccf0821, 0xb5c2032f, 0x8ae13205, 0x83ec390b, 0x98fb2419, 0x91f62f17, 0x4dd68d76, 0x44db8678, 0x5fcc9b6a, 0x56c19064, 0x69e2a14e, 0x60efaa40, 0x7bf8b752, 0x72f5bc5c, 0x05bed506, 0x0cb3de08, 0x17a4c31a, 0x1ea9c814, 0x218af93e, 0x2887f230, 0x3390ef22, 0x3a9de42c, 0xdd063d96, 0xd40b3698, 0xcf1c2b8a, 0xc6112084, 0xf93211ae, 0xf03f1aa0, 0xeb2807b2, 0xe2250cbc, 0x956e65e6, 0x9c636ee8, 0x877473fa, 0x8e7978f4, 0xb15a49de, 0xb85742d0, 0xa3405fc2, 0xaa4d54cc, 0xecdaf741, 0xe5d7fc4f, 0xfec0e15d, 0xf7cdea53, 0xc8eedb79, 0xc1e3d077, 0xdaf4cd65, 0xd3f9c66b, 0xa4b2af31, 0xadbfa43f, 0xb6a8b92d, 0xbfa5b223, 0x80868309, 0x898b8807, 0x929c9515, 0x9b919e1b, 0x7c0a47a1, 0x75074caf, 0x6e1051bd, 0x671d5ab3, 0x583e6b99, 0x51336097, 0x4a247d85, 0x4329768b, 0x34621fd1, 0x3d6f14df, 0x267809cd, 0x2f7502c3, 0x105633e9, 0x195b38e7, 0x024c25f5, 0x0b412efb, 0xd7618c9a, 0xde6c8794, 0xc57b9a86, 0xcc769188, 0xf355a0a2, 0xfa58abac, 0xe14fb6be, 0xe842bdb0, 0x9f09d4ea, 0x9604dfe4, 0x8d13c2f6, 0x841ec9f8, 0xbb3df8d2, 0xb230f3dc, 0xa927eece, 0xa02ae5c0, 0x47b13c7a, 0x4ebc3774, 0x55ab2a66, 0x5ca62168, 0x63851042, 0x6a881b4c, 0x719f065e, 0x78920d50, 0x0fd9640a, 0x06d46f04, 0x1dc37216, 0x14ce7918, 0x2bed4832, 0x22e0433c, 0x39f75e2e, 0x30fa5520, 0x9ab701ec, 0x93ba0ae2, 0x88ad17f0, 0x81a01cfe, 0xbe832dd4, 0xb78e26da, 0xac993bc8, 0xa59430c6, 0xd2df599c, 0xdbd25292, 0xc0c54f80, 0xc9c8448e, 0xf6eb75a4, 0xffe67eaa, 0xe4f163b8, 0xedfc68b6, 0x0a67b10c, 0x036aba02, 0x187da710, 0x1170ac1e, 0x2e539d34, 0x275e963a, 0x3c498b28, 0x35448026, 0x420fe97c, 0x4b02e272, 0x5015ff60, 0x5918f46e, 0x663bc544, 0x6f36ce4a, 0x7421d358, 0x7d2cd856, 0xa10c7a37, 0xa8017139, 0xb3166c2b, 0xba1b6725, 0x8538560f, 0x8c355d01, 0x97224013, 0x9e2f4b1d, 0xe9642247, 0xe0692949, 0xfb7e345b, 0xf2733f55, 0xcd500e7f, 0xc45d0571, 0xdf4a1863, 0xd647136d, 0x31dccad7, 0x38d1c1d9, 0x23c6dccb, 0x2acbd7c5, 0x15e8e6ef, 0x1ce5ede1, 0x07f2f0f3, 0x0efffbfd, 0x79b492a7, 0x70b999a9, 0x6bae84bb, 0x62a38fb5, 0x5d80be9f, 0x548db591, 0x4f9aa883, 0x4697a38d];
 
-	  Tokenizer.prototype.inlineText = function inlineText (src, inRawBlock, smartypants) {
-	    var cap = this.rules.inline.text.exec(src);
-	    if (cap) {
-	      var text;
-	      if (inRawBlock) {
-	        text = this.options.sanitize ? (this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape$2(cap[0])) : cap[0];
-	      } else {
-	        text = escape$2(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
+	    function convertToInt32(bytes) {
+	      var result = [];
+
+	      for (var i = 0; i < bytes.length; i += 4) {
+	        result.push(bytes[i] << 24 | bytes[i + 1] << 16 | bytes[i + 2] << 8 | bytes[i + 3]);
 	      }
-	      return {
-	        type: 'text',
-	        raw: cap[0],
-	        text: text
-	      };
+
+	      return result;
 	    }
-	  };
 
-	  return Tokenizer;
-	}());
+	    var AES = function AES(key) {
+	      if (!(this instanceof AES)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	var noopTest$1 = helpers.noopTest;
-	var edit$1 = helpers.edit;
-	var merge$2 = helpers.merge;
+	      Object.defineProperty(this, 'key', {
+	        value: coerceArray(key, true)
+	      });
 
-	/**
-	 * Block-Level Grammar
-	 */
-	var block = {
-	  newline: /^\n+/,
-	  code: /^( {4}[^\n]+\n*)+/,
-	  fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
-	  hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
-	  heading: /^ {0,3}(#{1,6}) +([^\n]*?)(?: +#+)? *(?:\n+|$)/,
-	  blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
-	  list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
-	  html: '^ {0,3}(?:' // optional indentation
-	    + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
-	    + '|comment[^\\n]*(\\n+|$)' // (2)
-	    + '|<\\?[\\s\\S]*?\\?>\\n*' // (3)
-	    + '|<![A-Z][\\s\\S]*?>\\n*' // (4)
-	    + '|<!\\[CDATA\\[[\\s\\S]*?\\]\\]>\\n*' // (5)
-	    + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:\\n{2,}|$)' // (6)
-	    + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) open tag
-	    + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) closing tag
-	    + ')',
-	  def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
-	  nptable: noopTest$1,
-	  table: noopTest$1,
-	  lheading: /^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)/,
-	  // regex template, placeholders will be replaced according to different paragraph
-	  // interruption rules of commonmark and the original markdown spec:
-	  _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html)[^\n]+)*)/,
-	  text: /^[^\n]+/
-	};
+	      this._prepare();
+	    };
 
-	block._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
-	block._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
-	block.def = edit$1(block.def)
-	  .replace('label', block._label)
-	  .replace('title', block._title)
-	  .getRegex();
+	    AES.prototype._prepare = function () {
+	      var rounds = numberOfRounds[this.key.length];
 
-	block.bullet = /(?:[*+-]|\d{1,9}\.)/;
-	block.item = /^( *)(bull) ?[^\n]*(?:\n(?!\1bull ?)[^\n]*)*/;
-	block.item = edit$1(block.item, 'gm')
-	  .replace(/bull/g, block.bullet)
-	  .getRegex();
-
-	block.list = edit$1(block.list)
-	  .replace(/bull/g, block.bullet)
-	  .replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))')
-	  .replace('def', '\\n+(?=' + block.def.source + ')')
-	  .getRegex();
-
-	block._tag = 'address|article|aside|base|basefont|blockquote|body|caption'
-	  + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption'
-	  + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe'
-	  + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option'
-	  + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr'
-	  + '|track|ul';
-	block._comment = /<!--(?!-?>)[\s\S]*?-->/;
-	block.html = edit$1(block.html, 'i')
-	  .replace('comment', block._comment)
-	  .replace('tag', block._tag)
-	  .replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/)
-	  .getRegex();
-
-	block.paragraph = edit$1(block._paragraph)
-	  .replace('hr', block.hr)
-	  .replace('heading', ' {0,3}#{1,6} ')
-	  .replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
-	  .replace('blockquote', ' {0,3}>')
-	  .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
-	  .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-	  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)')
-	  .replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
-	  .getRegex();
-
-	block.blockquote = edit$1(block.blockquote)
-	  .replace('paragraph', block.paragraph)
-	  .getRegex();
+	      if (rounds == null) {
+	        throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
+	      } // encryption round keys
 
-	/**
-	 * Normal Block Grammar
-	 */
 
-	block.normal = merge$2({}, block);
+	      this._Ke = []; // decryption round keys
 
-	/**
-	 * GFM Block Grammar
-	 */
+	      this._Kd = [];
 
-	block.gfm = merge$2({}, block.normal, {
-	  nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
-	    + ' *([-:]+ *\\|[-| :]*)' // Align
-	    + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)', // Cells
-	  table: '^ *\\|(.+)\\n' // Header
-	    + ' *\\|?( *[-:]+[-| :]*)' // Align
-	    + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells
-	});
+	      for (var i = 0; i <= rounds; i++) {
+	        this._Ke.push([0, 0, 0, 0]);
 
-	block.gfm.nptable = edit$1(block.gfm.nptable)
-	  .replace('hr', block.hr)
-	  .replace('heading', ' {0,3}#{1,6} ')
-	  .replace('blockquote', ' {0,3}>')
-	  .replace('code', ' {4}[^\\n]')
-	  .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
-	  .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-	  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)')
-	  .replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
-	  .getRegex();
-
-	block.gfm.table = edit$1(block.gfm.table)
-	  .replace('hr', block.hr)
-	  .replace('heading', ' {0,3}#{1,6} ')
-	  .replace('blockquote', ' {0,3}>')
-	  .replace('code', ' {4}[^\\n]')
-	  .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
-	  .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-	  .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)')
-	  .replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
-	  .getRegex();
+	        this._Kd.push([0, 0, 0, 0]);
+	      }
 
-	/**
-	 * Pedantic grammar (original John Gruber's loose markdown specification)
-	 */
+	      var roundKeyCount = (rounds + 1) * 4;
+	      var KC = this.key.length / 4; // convert the key into ints
 
-	block.pedantic = merge$2({}, block.normal, {
-	  html: edit$1(
-	    '^ *(?:comment *(?:\\n|\\s*$)'
-	    + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
-	    + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))')
-	    .replace('comment', block._comment)
-	    .replace(/tag/g, '(?!(?:'
-	      + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub'
-	      + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)'
-	      + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b')
-	    .getRegex(),
-	  def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
-	  heading: /^ *(#{1,6}) *([^\n]+?) *(?:#+ *)?(?:\n+|$)/,
-	  fences: noopTest$1, // fences not supported
-	  paragraph: edit$1(block.normal._paragraph)
-	    .replace('hr', block.hr)
-	    .replace('heading', ' *#{1,6} *[^\n]')
-	    .replace('lheading', block.lheading)
-	    .replace('blockquote', ' {0,3}>')
-	    .replace('|fences', '')
-	    .replace('|list', '')
-	    .replace('|html', '')
-	    .getRegex()
-	});
+	      var tk = convertToInt32(this.key); // copy values into round key arrays
 
-	/**
-	 * Inline-Level Grammar
-	 */
-	var inline = {
-	  escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
-	  autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
-	  url: noopTest$1,
-	  tag: '^comment'
-	    + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
-	    + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
-	    + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
-	    + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
-	    + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>', // CDATA section
-	  link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
-	  reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
-	  nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
-	  strong: /^__([^\s_])__(?!_)|^\*\*([^\s*])\*\*(?!\*)|^__([^\s][\s\S]*?[^\s])__(?!_)|^\*\*([^\s][\s\S]*?[^\s])\*\*(?!\*)/,
-	  em: /^_([^\s_])_(?!_)|^_([^\s_<][\s\S]*?[^\s_])_(?!_|[^\spunctuation])|^_([^\s_<][\s\S]*?[^\s])_(?!_|[^\spunctuation])|^\*([^\s*<\[])\*(?!\*)|^\*([^\s<"][\s\S]*?[^\s\[\*])\*(?![\]`punctuation])|^\*([^\s*"<\[][\s\S]*[^\s])\*(?!\*)/,
-	  code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
-	  br: /^( {2,}|\\)\n(?!\s*$)/,
-	  del: noopTest$1,
-	  text: /^(`+|[^`])(?:[\s\S]*?(?:(?=[\\<!\[`*]|\b_|$)|[^ ](?= {2,}\n))|(?= {2,}\n))/
-	};
+	      var index;
 
-	// list of punctuation marks from common mark spec
-	// without ` and ] to workaround Rule 17 (inline code blocks/links)
-	inline._punctuation = '!"#$%&\'()*+\\-./:;<=>?@\\[^_{|}~';
-	inline.em = edit$1(inline.em).replace(/punctuation/g, inline._punctuation).getRegex();
+	      for (var i = 0; i < KC; i++) {
+	        index = i >> 2;
+	        this._Ke[index][i % 4] = tk[i];
+	        this._Kd[rounds - index][i % 4] = tk[i];
+	      } // key expansion (fips-197 section 5.2)
 
-	inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
 
-	inline._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
-	inline._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
-	inline.autolink = edit$1(inline.autolink)
-	  .replace('scheme', inline._scheme)
-	  .replace('email', inline._email)
-	  .getRegex();
+	      var rconpointer = 0;
+	      var t = KC,
+	          tt;
 
-	inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
+	      while (t < roundKeyCount) {
+	        tt = tk[KC - 1];
+	        tk[0] ^= S[tt >> 16 & 0xFF] << 24 ^ S[tt >> 8 & 0xFF] << 16 ^ S[tt & 0xFF] << 8 ^ S[tt >> 24 & 0xFF] ^ rcon[rconpointer] << 24;
+	        rconpointer += 1; // key expansion (for non-256 bit)
 
-	inline.tag = edit$1(inline.tag)
-	  .replace('comment', block._comment)
-	  .replace('attribute', inline._attribute)
-	  .getRegex();
+	        if (KC != 8) {
+	          for (var i = 1; i < KC; i++) {
+	            tk[i] ^= tk[i - 1];
+	          } // key expansion for 256-bit keys is "slightly different" (fips-197)
 
-	inline._label = /(?:\[[^\[\]]*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
-	inline._href = /<(?:\\[<>]?|[^\s<>\\])*>|[^\s\x00-\x1f]*/;
-	inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
+	        } else {
+	          for (var i = 1; i < KC / 2; i++) {
+	            tk[i] ^= tk[i - 1];
+	          }
 
-	inline.link = edit$1(inline.link)
-	  .replace('label', inline._label)
-	  .replace('href', inline._href)
-	  .replace('title', inline._title)
-	  .getRegex();
+	          tt = tk[KC / 2 - 1];
+	          tk[KC / 2] ^= S[tt & 0xFF] ^ S[tt >> 8 & 0xFF] << 8 ^ S[tt >> 16 & 0xFF] << 16 ^ S[tt >> 24 & 0xFF] << 24;
 
-	inline.reflink = edit$1(inline.reflink)
-	  .replace('label', inline._label)
-	  .getRegex();
+	          for (var i = KC / 2 + 1; i < KC; i++) {
+	            tk[i] ^= tk[i - 1];
+	          }
+	        } // copy values into round key arrays
 
-	/**
-	 * Normal Inline Grammar
-	 */
 
-	inline.normal = merge$2({}, inline);
+	        var i = 0,
+	            r,
+	            c;
 
-	/**
-	 * Pedantic Inline Grammar
-	 */
+	        while (i < KC && t < roundKeyCount) {
+	          r = t >> 2;
+	          c = t % 4;
+	          this._Ke[r][c] = tk[i];
+	          this._Kd[rounds - r][c] = tk[i++];
+	          t++;
+	        }
+	      } // inverse-cipher-ify the decryption round key (fips-197 section 5.3)
 
-	inline.pedantic = merge$2({}, inline.normal, {
-	  strong: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
-	  em: /^_(?=\S)([\s\S]*?\S)_(?!_)|^\*(?=\S)([\s\S]*?\S)\*(?!\*)/,
-	  link: edit$1(/^!?\[(label)\]\((.*?)\)/)
-	    .replace('label', inline._label)
-	    .getRegex(),
-	  reflink: edit$1(/^!?\[(label)\]\s*\[([^\]]*)\]/)
-	    .replace('label', inline._label)
-	    .getRegex()
-	});
 
-	/**
-	 * GFM Inline Grammar
-	 */
+	      for (var r = 1; r < rounds; r++) {
+	        for (var c = 0; c < 4; c++) {
+	          tt = this._Kd[r][c];
+	          this._Kd[r][c] = U1[tt >> 24 & 0xFF] ^ U2[tt >> 16 & 0xFF] ^ U3[tt >> 8 & 0xFF] ^ U4[tt & 0xFF];
+	        }
+	      }
+	    };
 
-	inline.gfm = merge$2({}, inline.normal, {
-	  escape: edit$1(inline.escape).replace('])', '~|])').getRegex(),
-	  _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
-	  url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
-	  _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
-	  del: /^~+(?=\S)([\s\S]*?\S)~+/,
-	  text: /^(`+|[^`])(?:[\s\S]*?(?:(?=[\\<!\[`*~]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))|(?= {2,}\n|[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))/
-	});
+	    AES.prototype.encrypt = function (plaintext) {
+	      if (plaintext.length != 16) {
+	        throw new Error('invalid plaintext size (must be 16 bytes)');
+	      }
 
-	inline.gfm.url = edit$1(inline.gfm.url, 'i')
-	  .replace('email', inline.gfm._extended_email)
-	  .getRegex();
-	/**
-	 * GFM + Line Breaks Inline Grammar
-	 */
+	      var rounds = this._Ke.length - 1;
+	      var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
 
-	inline.breaks = merge$2({}, inline.gfm, {
-	  br: edit$1(inline.br).replace('{2,}', '*').getRegex(),
-	  text: edit$1(inline.gfm.text)
-	    .replace('\\b_', '\\b_| {2,}\\n')
-	    .replace(/\{2,\}/g, '*')
-	    .getRegex()
-	});
+	      var t = convertToInt32(plaintext);
 
-	var rules = {
-	  block: block,
-	  inline: inline
-	};
+	      for (var i = 0; i < 4; i++) {
+	        t[i] ^= this._Ke[0][i];
+	      } // apply round transforms
 
-	var defaults$2 = defaults.defaults;
-	var block$1 = rules.block;
-	var inline$1 = rules.inline;
 
-	/**
-	 * smartypants text replacement
-	 */
-	function smartypants(text) {
-	  return text
-	    // em-dashes
-	    .replace(/---/g, '\u2014')
-	    // en-dashes
-	    .replace(/--/g, '\u2013')
-	    // opening singles
-	    .replace(/(^|[-\u2014/(\[{"\s])'/g, '$1\u2018')
-	    // closing singles & apostrophes
-	    .replace(/'/g, '\u2019')
-	    // opening doubles
-	    .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, '$1\u201c')
-	    // closing doubles
-	    .replace(/"/g, '\u201d')
-	    // ellipses
-	    .replace(/\.{3}/g, '\u2026');
-	}
+	      for (var r = 1; r < rounds; r++) {
+	        for (var i = 0; i < 4; i++) {
+	          a[i] = T1[t[i] >> 24 & 0xff] ^ T2[t[(i + 1) % 4] >> 16 & 0xff] ^ T3[t[(i + 2) % 4] >> 8 & 0xff] ^ T4[t[(i + 3) % 4] & 0xff] ^ this._Ke[r][i];
+	        }
 
-	/**
-	 * mangle email addresses
-	 */
-	function mangle(text) {
-	  var out = '',
-	    i,
-	    ch;
+	        t = a.slice();
+	      } // the last round is special
 
-	  var l = text.length;
-	  for (i = 0; i < l; i++) {
-	    ch = text.charCodeAt(i);
-	    if (Math.random() > 0.5) {
-	      ch = 'x' + ch.toString(16);
-	    }
-	    out += '&#' + ch + ';';
-	  }
 
-	  return out;
-	}
+	      var result = createArray(16),
+	          tt;
 
-	/**
-	 * Block Lexer
-	 */
-	var Lexer_1 = /*@__PURE__*/(function () {
-	  function Lexer(options) {
-	    this.tokens = [];
-	    this.tokens.links = Object.create(null);
-	    this.options = options || defaults$2;
-	    this.options.tokenizer = this.options.tokenizer || new Tokenizer_1();
-	    this.tokenizer = this.options.tokenizer;
-	    this.tokenizer.options = this.options;
+	      for (var i = 0; i < 4; i++) {
+	        tt = this._Ke[rounds][i];
+	        result[4 * i] = (S[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
+	        result[4 * i + 1] = (S[t[(i + 1) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
+	        result[4 * i + 2] = (S[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
+	        result[4 * i + 3] = (S[t[(i + 3) % 4] & 0xff] ^ tt) & 0xff;
+	      }
 
-	    var rules = {
-	      block: block$1.normal,
-	      inline: inline$1.normal
+	      return result;
 	    };
 
-	    if (this.options.pedantic) {
-	      rules.block = block$1.pedantic;
-	      rules.inline = inline$1.pedantic;
-	    } else if (this.options.gfm) {
-	      rules.block = block$1.gfm;
-	      if (this.options.breaks) {
-	        rules.inline = inline$1.breaks;
-	      } else {
-	        rules.inline = inline$1.gfm;
+	    AES.prototype.decrypt = function (ciphertext) {
+	      if (ciphertext.length != 16) {
+	        throw new Error('invalid ciphertext size (must be 16 bytes)');
 	      }
-	    }
-	    this.tokenizer.rules = rules;
-	  }
 
-	  var staticAccessors = { rules: { configurable: true } };
+	      var rounds = this._Kd.length - 1;
+	      var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
 
-	  /**
-	   * Expose Rules
-	   */
-	  staticAccessors.rules.get = function () {
-	    return {
-	      block: block$1,
-	      inline: inline$1
-	    };
-	  };
+	      var t = convertToInt32(ciphertext);
 
-	  /**
-	   * Static Lex Method
-	   */
-	  Lexer.lex = function lex (src, options) {
-	    var lexer = new Lexer(options);
-	    return lexer.lex(src);
-	  };
+	      for (var i = 0; i < 4; i++) {
+	        t[i] ^= this._Kd[0][i];
+	      } // apply round transforms
 
-	  /**
-	   * Preprocessing
-	   */
-	  Lexer.prototype.lex = function lex (src) {
-	    src = src
-	      .replace(/\r\n|\r/g, '\n')
-	      .replace(/\t/g, '    ');
 
-	    this.blockTokens(src, this.tokens, true);
+	      for (var r = 1; r < rounds; r++) {
+	        for (var i = 0; i < 4; i++) {
+	          a[i] = T5[t[i] >> 24 & 0xff] ^ T6[t[(i + 3) % 4] >> 16 & 0xff] ^ T7[t[(i + 2) % 4] >> 8 & 0xff] ^ T8[t[(i + 1) % 4] & 0xff] ^ this._Kd[r][i];
+	        }
 
-	    this.inline(this.tokens);
+	        t = a.slice();
+	      } // the last round is special
 
-	    return this.tokens;
-	  };
 
-	  /**
-	   * Lexing
-	   */
-	  Lexer.prototype.blockTokens = function blockTokens (src, tokens, top) {
-	    if ( tokens === void 0 ) tokens = [];
-	    if ( top === void 0 ) top = true;
-
-	    src = src.replace(/^ +$/gm, '');
-	    var token, i, l;
-
-	    while (src) {
-	      // newline
-	      if (token = this.tokenizer.space(src)) {
-	        src = src.substring(token.raw.length);
-	        if (token.type) {
-	          tokens.push(token);
-	        }
-	        continue;
-	      }
+	      var result = createArray(16),
+	          tt;
 
-	      // code
-	      if (token = this.tokenizer.code(src, tokens)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
+	      for (var i = 0; i < 4; i++) {
+	        tt = this._Kd[rounds][i];
+	        result[4 * i] = (Si[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
+	        result[4 * i + 1] = (Si[t[(i + 3) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
+	        result[4 * i + 2] = (Si[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
+	        result[4 * i + 3] = (Si[t[(i + 1) % 4] & 0xff] ^ tt) & 0xff;
 	      }
 
-	      // fences
-	      if (token = this.tokenizer.fences(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      return result;
+	    };
+	    /**
+	     *  Mode Of Operation - Electonic Codebook (ECB)
+	     */
 
-	      // heading
-	      if (token = this.tokenizer.heading(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
 
-	      // table no leading pipe (gfm)
-	      if (token = this.tokenizer.nptable(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
+	    var ModeOfOperationECB = function ModeOfOperationECB(key) {
+	      if (!(this instanceof ModeOfOperationECB)) {
+	        throw Error('AES must be instanitated with `new`');
 	      }
 
-	      // hr
-	      if (token = this.tokenizer.hr(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      this.description = "Electronic Code Block";
+	      this.name = "ecb";
+	      this._aes = new AES(key);
+	    };
 
-	      // blockquote
-	      if (token = this.tokenizer.blockquote(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.blockTokens(token.text, [], top);
-	        tokens.push(token);
-	        continue;
-	      }
+	    ModeOfOperationECB.prototype.encrypt = function (plaintext) {
+	      plaintext = coerceArray(plaintext);
 
-	      // list
-	      if (token = this.tokenizer.list(src)) {
-	        src = src.substring(token.raw.length);
-	        l = token.items.length;
-	        for (i = 0; i < l; i++) {
-	          token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
-	        }
-	        tokens.push(token);
-	        continue;
+	      if (plaintext.length % 16 !== 0) {
+	        throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
 	      }
 
-	      // html
-	      if (token = this.tokenizer.html(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      var ciphertext = createArray(plaintext.length);
+	      var block = createArray(16);
 
-	      // def
-	      if (top && (token = this.tokenizer.def(src))) {
-	        src = src.substring(token.raw.length);
-	        if (!this.tokens.links[token.tag]) {
-	          this.tokens.links[token.tag] = {
-	            href: token.href,
-	            title: token.title
-	          };
-	        }
-	        continue;
+	      for (var i = 0; i < plaintext.length; i += 16) {
+	        copyArray(plaintext, block, 0, i, i + 16);
+	        block = this._aes.encrypt(block);
+	        copyArray(block, ciphertext, i);
 	      }
 
-	      // table (gfm)
-	      if (token = this.tokenizer.table(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      return ciphertext;
+	    };
 
-	      // lheading
-	      if (token = this.tokenizer.lheading(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	    ModeOfOperationECB.prototype.decrypt = function (ciphertext) {
+	      ciphertext = coerceArray(ciphertext);
 
-	      // top-level paragraph
-	      if (top && (token = this.tokenizer.paragraph(src))) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
+	      if (ciphertext.length % 16 !== 0) {
+	        throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
 	      }
 
-	      // text
-	      if (token = this.tokenizer.text(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      var plaintext = createArray(ciphertext.length);
+	      var block = createArray(16);
 
-	      if (src) {
-	        var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
-	        if (this.options.silent) {
-	          console.error(errMsg);
-	          break;
-	        } else {
-	          throw new Error(errMsg);
-	        }
+	      for (var i = 0; i < ciphertext.length; i += 16) {
+	        copyArray(ciphertext, block, 0, i, i + 16);
+	        block = this._aes.decrypt(block);
+	        copyArray(block, plaintext, i);
 	      }
-	    }
-
-	    return tokens;
-	  };
 
-	  Lexer.prototype.inline = function inline (tokens) {
-	    var i,
-	      j,
-	      k,
-	      l2,
-	      row,
-	      token;
+	      return plaintext;
+	    };
+	    /**
+	     *  Mode Of Operation - Cipher Block Chaining (CBC)
+	     */
 
-	    var l = tokens.length;
-	    for (i = 0; i < l; i++) {
-	      token = tokens[i];
-	      switch (token.type) {
-	        case 'paragraph':
-	        case 'text':
-	        case 'heading': {
-	          token.tokens = [];
-	          this.inlineTokens(token.text, token.tokens);
-	          break;
-	        }
-	        case 'table': {
-	          token.tokens = {
-	            header: [],
-	            cells: []
-	          };
 
-	          // header
-	          l2 = token.header.length;
-	          for (j = 0; j < l2; j++) {
-	            token.tokens.header[j] = [];
-	            this.inlineTokens(token.header[j], token.tokens.header[j]);
-	          }
+	    var ModeOfOperationCBC = function ModeOfOperationCBC(key, iv) {
+	      if (!(this instanceof ModeOfOperationCBC)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	          // cells
-	          l2 = token.cells.length;
-	          for (j = 0; j < l2; j++) {
-	            row = token.cells[j];
-	            token.tokens.cells[j] = [];
-	            for (k = 0; k < row.length; k++) {
-	              token.tokens.cells[j][k] = [];
-	              this.inlineTokens(row[k], token.tokens.cells[j][k]);
-	            }
-	          }
+	      this.description = "Cipher Block Chaining";
+	      this.name = "cbc";
 
-	          break;
-	        }
-	        case 'blockquote': {
-	          this.inline(token.tokens);
-	          break;
-	        }
-	        case 'list': {
-	          l2 = token.items.length;
-	          for (j = 0; j < l2; j++) {
-	            this.inline(token.items[j].tokens);
-	          }
-	          break;
-	        }
+	      if (!iv) {
+	        iv = createArray(16);
+	      } else if (iv.length != 16) {
+	        throw new Error('invalid initialation vector size (must be 16 bytes)');
 	      }
-	    }
 
-	    return tokens;
-	  };
+	      this._lastCipherblock = coerceArray(iv, true);
+	      this._aes = new AES(key);
+	    };
 
-	  /**
-	   * Lexing/Compiling
-	   */
-	  Lexer.prototype.inlineTokens = function inlineTokens (src, tokens, inLink, inRawBlock) {
-	    if ( tokens === void 0 ) tokens = [];
-	    if ( inLink === void 0 ) inLink = false;
-	    if ( inRawBlock === void 0 ) inRawBlock = false;
-
-	    var token;
-
-	    while (src) {
-	      // escape
-	      if (token = this.tokenizer.escape(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	    ModeOfOperationCBC.prototype.encrypt = function (plaintext) {
+	      plaintext = coerceArray(plaintext);
 
-	      // tag
-	      if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
-	        src = src.substring(token.raw.length);
-	        inLink = token.inLink;
-	        inRawBlock = token.inRawBlock;
-	        tokens.push(token);
-	        continue;
+	      if (plaintext.length % 16 !== 0) {
+	        throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
 	      }
 
-	      // link
-	      if (token = this.tokenizer.link(src)) {
-	        src = src.substring(token.raw.length);
-	        if (token.type === 'link') {
-	          token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
-	        }
-	        tokens.push(token);
-	        continue;
-	      }
+	      var ciphertext = createArray(plaintext.length);
+	      var block = createArray(16);
+
+	      for (var i = 0; i < plaintext.length; i += 16) {
+	        copyArray(plaintext, block, 0, i, i + 16);
 
-	      // reflink, nolink
-	      if (token = this.tokenizer.reflink(src, this.tokens.links)) {
-	        src = src.substring(token.raw.length);
-	        if (token.type === 'link') {
-	          token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+	        for (var j = 0; j < 16; j++) {
+	          block[j] ^= this._lastCipherblock[j];
 	        }
-	        tokens.push(token);
-	        continue;
-	      }
 
-	      // strong
-	      if (token = this.tokenizer.strong(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-	        tokens.push(token);
-	        continue;
+	        this._lastCipherblock = this._aes.encrypt(block);
+	        copyArray(this._lastCipherblock, ciphertext, i);
 	      }
 
-	      // em
-	      if (token = this.tokenizer.em(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-	        tokens.push(token);
-	        continue;
-	      }
+	      return ciphertext;
+	    };
 
-	      // code
-	      if (token = this.tokenizer.codespan(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	    ModeOfOperationCBC.prototype.decrypt = function (ciphertext) {
+	      ciphertext = coerceArray(ciphertext);
 
-	      // br
-	      if (token = this.tokenizer.br(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
+	      if (ciphertext.length % 16 !== 0) {
+	        throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
 	      }
 
-	      // del (gfm)
-	      if (token = this.tokenizer.del(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-	        tokens.push(token);
-	        continue;
-	      }
+	      var plaintext = createArray(ciphertext.length);
+	      var block = createArray(16);
 
-	      // autolink
-	      if (token = this.tokenizer.autolink(src, mangle)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      for (var i = 0; i < ciphertext.length; i += 16) {
+	        copyArray(ciphertext, block, 0, i, i + 16);
+	        block = this._aes.decrypt(block);
 
-	      // url (gfm)
-	      if (!inLink && (token = this.tokenizer.url(src, mangle))) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	        for (var j = 0; j < 16; j++) {
+	          plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
+	        }
 
-	      // text
-	      if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
+	        copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
 	      }
 
-	      if (src) {
-	        var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
-	        if (this.options.silent) {
-	          console.error(errMsg);
-	          break;
-	        } else {
-	          throw new Error(errMsg);
-	        }
-	      }
-	    }
+	      return plaintext;
+	    };
+	    /**
+	     *  Mode Of Operation - Cipher Feedback (CFB)
+	     */
 
-	    return tokens;
-	  };
 
-	  Object.defineProperties( Lexer, staticAccessors );
+	    var ModeOfOperationCFB = function ModeOfOperationCFB(key, iv, segmentSize) {
+	      if (!(this instanceof ModeOfOperationCFB)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	  return Lexer;
-	}());
+	      this.description = "Cipher Feedback";
+	      this.name = "cfb";
 
-	var defaults$3 = defaults.defaults;
-	var cleanUrl$1 = helpers.cleanUrl;
-	var escape$3 = helpers.escape;
+	      if (!iv) {
+	        iv = createArray(16);
+	      } else if (iv.length != 16) {
+	        throw new Error('invalid initialation vector size (must be 16 size)');
+	      }
 
-	/**
-	 * Renderer
-	 */
-	var Renderer_1 = /*@__PURE__*/(function () {
-	  function Renderer(options) {
-	    this.options = options || defaults$3;
-	  }
+	      if (!segmentSize) {
+	        segmentSize = 1;
+	      }
+
+	      this.segmentSize = segmentSize;
+	      this._shiftRegister = coerceArray(iv, true);
+	      this._aes = new AES(key);
+	    };
 
-	  Renderer.prototype.code = function code (code$1, infostring, escaped) {
-	    var lang = (infostring || '').match(/\S*/)[0];
-	    if (this.options.highlight) {
-	      var out = this.options.highlight(code$1, lang);
-	      if (out != null && out !== code$1) {
-	        escaped = true;
-	        code$1 = out;
+	    ModeOfOperationCFB.prototype.encrypt = function (plaintext) {
+	      if (plaintext.length % this.segmentSize != 0) {
+	        throw new Error('invalid plaintext size (must be segmentSize bytes)');
 	      }
-	    }
 
-	    if (!lang) {
-	      return '<pre><code>'
-	        + (escaped ? code$1 : escape$3(code$1, true))
-	        + '</code></pre>';
-	    }
+	      var encrypted = coerceArray(plaintext, true);
+	      var xorSegment;
 
-	    return '<pre><code class="'
-	      + this.options.langPrefix
-	      + escape$3(lang, true)
-	      + '">'
-	      + (escaped ? code$1 : escape$3(code$1, true))
-	      + '</code></pre>\n';
-	  };
+	      for (var i = 0; i < encrypted.length; i += this.segmentSize) {
+	        xorSegment = this._aes.encrypt(this._shiftRegister);
 
-	  Renderer.prototype.blockquote = function blockquote (quote) {
-	    return '<blockquote>\n' + quote + '</blockquote>\n';
-	  };
+	        for (var j = 0; j < this.segmentSize; j++) {
+	          encrypted[i + j] ^= xorSegment[j];
+	        } // Shift the register
 
-	  Renderer.prototype.html = function html (html$1) {
-	    return html$1;
-	  };
 
-	  Renderer.prototype.heading = function heading (text, level, raw, slugger) {
-	    if (this.options.headerIds) {
-	      return '<h'
-	        + level
-	        + ' id="'
-	        + this.options.headerPrefix
-	        + slugger.slug(raw)
-	        + '">'
-	        + text
-	        + '</h'
-	        + level
-	        + '>\n';
-	    }
-	    // ignore IDs
-	    return '<h' + level + '>' + text + '</h' + level + '>\n';
-	  };
+	        copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
+	        copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+	      }
 
-	  Renderer.prototype.hr = function hr () {
-	    return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
-	  };
+	      return encrypted;
+	    };
 
-	  Renderer.prototype.list = function list (body, ordered, start) {
-	    var type = ordered ? 'ol' : 'ul',
-	      startatt = (ordered && start !== 1) ? (' start="' + start + '"') : '';
-	    return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
-	  };
+	    ModeOfOperationCFB.prototype.decrypt = function (ciphertext) {
+	      if (ciphertext.length % this.segmentSize != 0) {
+	        throw new Error('invalid ciphertext size (must be segmentSize bytes)');
+	      }
 
-	  Renderer.prototype.listitem = function listitem (text) {
-	    return '<li>' + text + '</li>\n';
-	  };
+	      var plaintext = coerceArray(ciphertext, true);
+	      var xorSegment;
 
-	  Renderer.prototype.checkbox = function checkbox (checked) {
-	    return '<input '
-	      + (checked ? 'checked="" ' : '')
-	      + 'disabled="" type="checkbox"'
-	      + (this.options.xhtml ? ' /' : '')
-	      + '> ';
-	  };
+	      for (var i = 0; i < plaintext.length; i += this.segmentSize) {
+	        xorSegment = this._aes.encrypt(this._shiftRegister);
 
-	  Renderer.prototype.paragraph = function paragraph (text) {
-	    return '<p>' + text + '</p>\n';
-	  };
+	        for (var j = 0; j < this.segmentSize; j++) {
+	          plaintext[i + j] ^= xorSegment[j];
+	        } // Shift the register
 
-	  Renderer.prototype.table = function table (header, body) {
-	    if (body) { body = '<tbody>' + body + '</tbody>'; }
 
-	    return '<table>\n'
-	      + '<thead>\n'
-	      + header
-	      + '</thead>\n'
-	      + body
-	      + '</table>\n';
-	  };
+	        copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
+	        copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+	      }
 
-	  Renderer.prototype.tablerow = function tablerow (content) {
-	    return '<tr>\n' + content + '</tr>\n';
-	  };
+	      return plaintext;
+	    };
+	    /**
+	     *  Mode Of Operation - Output Feedback (OFB)
+	     */
 
-	  Renderer.prototype.tablecell = function tablecell (content, flags) {
-	    var type = flags.header ? 'th' : 'td';
-	    var tag = flags.align
-	      ? '<' + type + ' align="' + flags.align + '">'
-	      : '<' + type + '>';
-	    return tag + content + '</' + type + '>\n';
-	  };
 
-	  // span level renderer
-	  Renderer.prototype.strong = function strong (text) {
-	    return '<strong>' + text + '</strong>';
-	  };
+	    var ModeOfOperationOFB = function ModeOfOperationOFB(key, iv) {
+	      if (!(this instanceof ModeOfOperationOFB)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	  Renderer.prototype.em = function em (text) {
-	    return '<em>' + text + '</em>';
-	  };
+	      this.description = "Output Feedback";
+	      this.name = "ofb";
 
-	  Renderer.prototype.codespan = function codespan (text) {
-	    return '<code>' + text + '</code>';
-	  };
+	      if (!iv) {
+	        iv = createArray(16);
+	      } else if (iv.length != 16) {
+	        throw new Error('invalid initialation vector size (must be 16 bytes)');
+	      }
 
-	  Renderer.prototype.br = function br () {
-	    return this.options.xhtml ? '<br/>' : '<br>';
-	  };
+	      this._lastPrecipher = coerceArray(iv, true);
+	      this._lastPrecipherIndex = 16;
+	      this._aes = new AES(key);
+	    };
 
-	  Renderer.prototype.del = function del (text) {
-	    return '<del>' + text + '</del>';
-	  };
+	    ModeOfOperationOFB.prototype.encrypt = function (plaintext) {
+	      var encrypted = coerceArray(plaintext, true);
 
-	  Renderer.prototype.link = function link (href, title, text) {
-	    href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
-	    if (href === null) {
-	      return text;
-	    }
-	    var out = '<a href="' + escape$3(href) + '"';
-	    if (title) {
-	      out += ' title="' + title + '"';
-	    }
-	    out += '>' + text + '</a>';
-	    return out;
-	  };
+	      for (var i = 0; i < encrypted.length; i++) {
+	        if (this._lastPrecipherIndex === 16) {
+	          this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
+	          this._lastPrecipherIndex = 0;
+	        }
 
-	  Renderer.prototype.image = function image (href, title, text) {
-	    href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
-	    if (href === null) {
-	      return text;
-	    }
+	        encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
+	      }
 
-	    var out = '<img src="' + href + '" alt="' + text + '"';
-	    if (title) {
-	      out += ' title="' + title + '"';
-	    }
-	    out += this.options.xhtml ? '/>' : '>';
-	    return out;
-	  };
+	      return encrypted;
+	    }; // Decryption is symetric
 
-	  Renderer.prototype.text = function text (text$1) {
-	    return text$1;
-	  };
 
-	  return Renderer;
-	}());
+	    ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
+	    /**
+	     *  Counter object for CTR common mode of operation
+	     */
 
-	/**
-	 * TextRenderer
-	 * returns only the textual part of the token
-	 */
-	var TextRenderer_1 = /*@__PURE__*/(function () {
-	  function TextRenderer () {}
+	    var Counter = function Counter(initialValue) {
+	      if (!(this instanceof Counter)) {
+	        throw Error('Counter must be instanitated with `new`');
+	      } // We allow 0, but anything false-ish uses the default 1
 
-	  TextRenderer.prototype.strong = function strong (text) {
-	    return text;
-	  };
 
-	  TextRenderer.prototype.em = function em (text) {
-	    return text;
-	  };
+	      if (initialValue !== 0 && !initialValue) {
+	        initialValue = 1;
+	      }
 
-	  TextRenderer.prototype.codespan = function codespan (text) {
-	    return text;
-	  };
+	      if (typeof initialValue === 'number') {
+	        this._counter = createArray(16);
+	        this.setValue(initialValue);
+	      } else {
+	        this.setBytes(initialValue);
+	      }
+	    };
 
-	  TextRenderer.prototype.del = function del (text) {
-	    return text;
-	  };
+	    Counter.prototype.setValue = function (value) {
+	      if (typeof value !== 'number' || parseInt(value) != value) {
+	        throw new Error('invalid counter value (must be an integer)');
+	      } // We cannot safely handle numbers beyond the safe range for integers
 
-	  TextRenderer.prototype.html = function html (text) {
-	    return text;
-	  };
 
-	  TextRenderer.prototype.text = function text (text$1) {
-	    return text$1;
-	  };
+	      if (value > Number.MAX_SAFE_INTEGER) {
+	        throw new Error('integer value out of safe range');
+	      }
 
-	  TextRenderer.prototype.link = function link (href, title, text) {
-	    return '' + text;
-	  };
+	      for (var index = 15; index >= 0; --index) {
+	        this._counter[index] = value % 256;
+	        value = parseInt(value / 256);
+	      }
+	    };
 
-	  TextRenderer.prototype.image = function image (href, title, text) {
-	    return '' + text;
-	  };
+	    Counter.prototype.setBytes = function (bytes) {
+	      bytes = coerceArray(bytes, true);
 
-	  TextRenderer.prototype.br = function br () {
-	    return '';
-	  };
+	      if (bytes.length != 16) {
+	        throw new Error('invalid counter bytes size (must be 16 bytes)');
+	      }
 
-	  return TextRenderer;
-	}());
+	      this._counter = bytes;
+	    };
 
-	/**
-	 * Slugger generates header id
-	 */
-	var Slugger_1 = /*@__PURE__*/(function () {
-	  function Slugger() {
-	    this.seen = {};
-	  }
+	    Counter.prototype.increment = function () {
+	      for (var i = 15; i >= 0; i--) {
+	        if (this._counter[i] === 255) {
+	          this._counter[i] = 0;
+	        } else {
+	          this._counter[i]++;
+	          break;
+	        }
+	      }
+	    };
+	    /**
+	     *  Mode Of Operation - Counter (CTR)
+	     */
 
-	  /**
-	   * Convert string to unique id
-	   */
-	  Slugger.prototype.slug = function slug (value) {
-	    var slug = value
-	      .toLowerCase()
-	      .trim()
-	      // remove html tags
-	      .replace(/<[!\/a-z].*?>/ig, '')
-	      // remove unwanted chars
-	      .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '')
-	      .replace(/\s/g, '-');
-
-	    if (this.seen.hasOwnProperty(slug)) {
-	      var originalSlug = slug;
-	      do {
-	        this.seen[originalSlug]++;
-	        slug = originalSlug + '-' + this.seen[originalSlug];
-	      } while (this.seen.hasOwnProperty(slug));
-	    }
-	    this.seen[slug] = 0;
 
-	    return slug;
-	  };
+	    var ModeOfOperationCTR = function ModeOfOperationCTR(key, counter) {
+	      if (!(this instanceof ModeOfOperationCTR)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	  return Slugger;
-	}());
+	      this.description = "Counter";
+	      this.name = "ctr";
 
-	var defaults$4 = defaults.defaults;
-	var unescape$2 = helpers.unescape;
+	      if (!(counter instanceof Counter)) {
+	        counter = new Counter(counter);
+	      }
 
-	/**
-	 * Parsing & Compiling
-	 */
-	var Parser_1 = /*@__PURE__*/(function () {
-	  function Parser(options) {
-	    this.options = options || defaults$4;
-	    this.options.renderer = this.options.renderer || new Renderer_1();
-	    this.renderer = this.options.renderer;
-	    this.renderer.options = this.options;
-	    this.textRenderer = new TextRenderer_1();
-	    this.slugger = new Slugger_1();
-	  }
+	      this._counter = counter;
+	      this._remainingCounter = null;
+	      this._remainingCounterIndex = 16;
+	      this._aes = new AES(key);
+	    };
 
-	  /**
-	   * Static Parse Method
-	   */
-	  Parser.parse = function parse (tokens, options) {
-	    var parser = new Parser(options);
-	    return parser.parse(tokens);
-	  };
+	    ModeOfOperationCTR.prototype.encrypt = function (plaintext) {
+	      var encrypted = coerceArray(plaintext, true);
 
-	  /**
-	   * Parse Loop
-	   */
-	  Parser.prototype.parse = function parse (tokens, top) {
-	    if ( top === void 0 ) top = true;
+	      for (var i = 0; i < encrypted.length; i++) {
+	        if (this._remainingCounterIndex === 16) {
+	          this._remainingCounter = this._aes.encrypt(this._counter._counter);
+	          this._remainingCounterIndex = 0;
 
-	    var out = '',
-	      i,
-	      j,
-	      k,
-	      l2,
-	      l3,
-	      row,
-	      cell,
-	      header,
-	      body,
-	      token,
-	      ordered,
-	      start,
-	      loose,
-	      itemBody,
-	      item,
-	      checked,
-	      task,
-	      checkbox;
-
-	    var l = tokens.length;
-	    for (i = 0; i < l; i++) {
-	      token = tokens[i];
-	      switch (token.type) {
-	        case 'space': {
-	          continue;
-	        }
-	        case 'hr': {
-	          out += this.renderer.hr();
-	          continue;
-	        }
-	        case 'heading': {
-	          out += this.renderer.heading(
-	            this.parseInline(token.tokens),
-	            token.depth,
-	            unescape$2(this.parseInline(token.tokens, this.textRenderer)),
-	            this.slugger);
-	          continue;
-	        }
-	        case 'code': {
-	          out += this.renderer.code(token.text,
-	            token.lang,
-	            token.escaped);
-	          continue;
+	          this._counter.increment();
 	        }
-	        case 'table': {
-	          header = '';
-
-	          // header
-	          cell = '';
-	          l2 = token.header.length;
-	          for (j = 0; j < l2; j++) {
-	            cell += this.renderer.tablecell(
-	              this.parseInline(token.tokens.header[j]),
-	              { header: true, align: token.align[j] }
-	            );
-	          }
-	          header += this.renderer.tablerow(cell);
-
-	          body = '';
-	          l2 = token.cells.length;
-	          for (j = 0; j < l2; j++) {
-	            row = token.tokens.cells[j];
-
-	            cell = '';
-	            l3 = row.length;
-	            for (k = 0; k < l3; k++) {
-	              cell += this.renderer.tablecell(
-	                this.parseInline(row[k]),
-	                { header: false, align: token.align[k] }
-	              );
-	            }
 
-	            body += this.renderer.tablerow(cell);
-	          }
-	          out += this.renderer.table(header, body);
-	          continue;
-	        }
-	        case 'blockquote': {
-	          body = this.parse(token.tokens);
-	          out += this.renderer.blockquote(body);
-	          continue;
-	        }
-	        case 'list': {
-	          ordered = token.ordered;
-	          start = token.start;
-	          loose = token.loose;
-	          l2 = token.items.length;
-
-	          body = '';
-	          for (j = 0; j < l2; j++) {
-	            item = token.items[j];
-	            checked = item.checked;
-	            task = item.task;
-
-	            itemBody = '';
-	            if (item.task) {
-	              checkbox = this.renderer.checkbox(checked);
-	              if (loose) {
-	                if (item.tokens[0].type === 'text') {
-	                  item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
-	                  if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
-	                    item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
-	                  }
-	                } else {
-	                  item.tokens.unshift({
-	                    type: 'text',
-	                    text: checkbox
-	                  });
-	                }
-	              } else {
-	                itemBody += checkbox;
-	              }
-	            }
+	        encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
+	      }
 
-	            itemBody += this.parse(item.tokens, loose);
-	            body += this.renderer.listitem(itemBody, task, checked);
-	          }
+	      return encrypted;
+	    }; // Decryption is symetric
 
-	          out += this.renderer.list(body, ordered, start);
-	          continue;
-	        }
-	        case 'html': {
-	          // TODO parse inline content if parameter markdown=1
-	          out += this.renderer.html(token.text);
-	          continue;
-	        }
-	        case 'paragraph': {
-	          out += this.renderer.paragraph(this.parseInline(token.tokens));
-	          continue;
-	        }
-	        case 'text': {
-	          body = token.tokens ? this.parseInline(token.tokens) : token.text;
-	          while (i + 1 < l && tokens[i + 1].type === 'text') {
-	            token = tokens[++i];
-	            body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
-	          }
-	          out += top ? this.renderer.paragraph(body) : body;
-	          continue;
-	        }
-	        default: {
-	          var errMsg = 'Token with "' + token.type + '" type was not found.';
-	          if (this.options.silent) {
-	            console.error(errMsg);
-	            return;
-	          } else {
-	            throw new Error(errMsg);
-	          }
-	        }
+
+	    ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt; ///////////////////////
+	    // Padding
+	    // See:https://tools.ietf.org/html/rfc2315
+
+	    function pkcs7pad(data) {
+	      data = coerceArray(data, true);
+	      var padder = 16 - data.length % 16;
+	      var result = createArray(data.length + padder);
+	      copyArray(data, result);
+
+	      for (var i = data.length; i < result.length; i++) {
+	        result[i] = padder;
 	      }
+
+	      return result;
 	    }
 
-	    return out;
-	  };
+	    function pkcs7strip(data) {
+	      data = coerceArray(data, true);
 
-	  /**
-	   * Parse Inline Tokens
-	   */
-	  Parser.prototype.parseInline = function parseInline (tokens, renderer) {
-	    renderer = renderer || this.renderer;
-	    var out = '',
-	      i,
-	      token;
+	      if (data.length < 16) {
+	        throw new Error('PKCS#7 invalid length');
+	      }
 
-	    var l = tokens.length;
-	    for (i = 0; i < l; i++) {
-	      token = tokens[i];
-	      switch (token.type) {
-	        case 'escape': {
-	          out += renderer.text(token.text);
-	          break;
-	        }
-	        case 'html': {
-	          out += renderer.html(token.text);
-	          break;
-	        }
-	        case 'link': {
-	          out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
-	          break;
-	        }
-	        case 'image': {
-	          out += renderer.image(token.href, token.title, token.text);
-	          break;
-	        }
-	        case 'strong': {
-	          out += renderer.strong(this.parseInline(token.tokens, renderer));
-	          break;
-	        }
-	        case 'em': {
-	          out += renderer.em(this.parseInline(token.tokens, renderer));
-	          break;
-	        }
-	        case 'codespan': {
-	          out += renderer.codespan(token.text);
-	          break;
-	        }
-	        case 'br': {
-	          out += renderer.br();
-	          break;
-	        }
-	        case 'del': {
-	          out += renderer.del(this.parseInline(token.tokens, renderer));
-	          break;
-	        }
-	        case 'text': {
-	          out += renderer.text(token.text);
-	          break;
-	        }
-	        default: {
-	          var errMsg = 'Token with "' + token.type + '" type was not found.';
-	          if (this.options.silent) {
-	            console.error(errMsg);
-	            return;
-	          } else {
-	            throw new Error(errMsg);
-	          }
+	      var padder = data[data.length - 1];
+
+	      if (padder > 16) {
+	        throw new Error('PKCS#7 padding byte out of range');
+	      }
+
+	      var length = data.length - padder;
+
+	      for (var i = 0; i < padder; i++) {
+	        if (data[length + i] !== padder) {
+	          throw new Error('PKCS#7 invalid padding byte');
 	        }
 	      }
-	    }
-	    return out;
-	  };
 
-	  return Parser;
-	}());
+	      var result = createArray(length);
+	      copyArray(data, result, 0, 0, length);
+	      return result;
+	    } ///////////////////////
+	    // Exporting
+	    // The block cipher
 
-	var merge$3 = helpers.merge;
-	var checkSanitizeDeprecation$1 = helpers.checkSanitizeDeprecation;
-	var escape$4 = helpers.escape;
-	var getDefaults = defaults.getDefaults;
-	var changeDefaults = defaults.changeDefaults;
-	var defaults$5 = defaults.defaults;
 
-	/**
-	 * Marked
-	 */
-	function marked(src, opt, callback) {
-	  // throw error in case of non string input
-	  if (typeof src === 'undefined' || src === null) {
-	    throw new Error('marked(): input parameter is undefined or null');
-	  }
-	  if (typeof src !== 'string') {
-	    throw new Error('marked(): input parameter is of type '
-	      + Object.prototype.toString.call(src) + ', string expected');
-	  }
+	    var aesjs = {
+	      AES: AES,
+	      Counter: Counter,
+	      ModeOfOperation: {
+	        ecb: ModeOfOperationECB,
+	        cbc: ModeOfOperationCBC,
+	        cfb: ModeOfOperationCFB,
+	        ofb: ModeOfOperationOFB,
+	        ctr: ModeOfOperationCTR
+	      },
+	      utils: {
+	        hex: convertHex,
+	        utf8: convertUtf8
+	      },
+	      padding: {
+	        pkcs7: {
+	          pad: pkcs7pad,
+	          strip: pkcs7strip
+	        }
+	      },
+	      _arrayTest: {
+	        coerceArray: coerceArray,
+	        createArray: createArray,
+	        copyArray: copyArray
+	      }
+	    }; // node.js
 
-	  if (callback || typeof opt === 'function') {
-	    if (!callback) {
-	      callback = opt;
-	      opt = null;
+	    {
+	      module.exports = aesjs; // RequireJS/AMD
+	      // http://www.requirejs.org/docs/api.html
+	      // https://github.com/amdjs/amdjs-api/wiki/AMD
 	    }
+	  })();
+	});
 
-	    opt = merge$3({}, marked.defaults, opt || {});
-	    checkSanitizeDeprecation$1(opt);
-	    var highlight = opt.highlight;
-	    var tokens,
-	      pending,
-	      i = 0;
+	// We can use keys that are 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes).
+	// To generate a random key:  window.crypto.getRandomValues(new Uint8Array(16));
+	// This default signing key is built into iD and can be used to mask/unmask sensitive values.
 
-	    try {
-	      tokens = Lexer_1.lex(src, opt);
-	    } catch (e) {
-	      return callback(e);
+	var DEFAULT_128 = [250, 157, 60, 79, 142, 134, 229, 129, 138, 126, 210, 129, 29, 71, 160, 208];
+	function utilAesEncrypt(text, key) {
+	  key = key || DEFAULT_128;
+	  var textBytes = aesJs.utils.utf8.toBytes(text);
+	  var aesCtr = new aesJs.ModeOfOperation.ctr(key);
+	  var encryptedBytes = aesCtr.encrypt(textBytes);
+	  var encryptedHex = aesJs.utils.hex.fromBytes(encryptedBytes);
+	  return encryptedHex;
+	}
+	function utilAesDecrypt(encryptedHex, key) {
+	  key = key || DEFAULT_128;
+	  var encryptedBytes = aesJs.utils.hex.toBytes(encryptedHex);
+	  var aesCtr = new aesJs.ModeOfOperation.ctr(key);
+	  var decryptedBytes = aesCtr.decrypt(encryptedBytes);
+	  var text = aesJs.utils.utf8.fromBytes(decryptedBytes);
+	  return text;
+	}
+
+	function utilCleanTags(tags) {
+	  var out = {};
+
+	  for (var k in tags) {
+	    if (!k) continue;
+	    var v = tags[k];
+
+	    if (v !== undefined) {
+	      out[k] = cleanValue(k, v);
 	    }
+	  }
 
-	    pending = tokens.length;
+	  return out;
 
-	    var done = function(err) {
-	      if (err) {
-	        opt.highlight = highlight;
-	        return callback(err);
-	      }
+	  function cleanValue(k, v) {
+	    function keepSpaces(k) {
+	      return /_hours|_times|:conditional$/.test(k);
+	    }
 
-	      var out;
+	    function skip(k) {
+	      return /^(description|note|fixme)$/.test(k);
+	    }
 
-	      try {
-	        out = Parser_1.parse(tokens, opt);
-	      } catch (e) {
-	        err = e;
-	      }
+	    if (skip(k)) return v;
+	    var cleaned = v.split(';').map(function (s) {
+	      return s.trim();
+	    }).join(keepSpaces(k) ? '; ' : ';'); // The code below is not intended to validate websites and emails.
+	    // It is only intended to prevent obvious copy-paste errors. (#2323)
+	    // clean website- and email-like tags
 
-	      opt.highlight = highlight;
+	    if (k.indexOf('website') !== -1 || k.indexOf('email') !== -1 || cleaned.indexOf('http') === 0) {
+	      cleaned = cleaned.replace(/[\u200B-\u200F\uFEFF]/g, ''); // strip LRM and other zero width chars
+	    }
 
-	      return err
-	        ? callback(err)
-	        : callback(null, out);
-	    };
+	    return cleaned;
+	  }
+	}
 
-	    if (!highlight || highlight.length < 3) {
-	      return done();
+	// Like selection.property('value', ...), but avoids no-op value sets,
+	// which can result in layout/repaint thrashing in some situations.
+	function utilGetSetValue(selection, value) {
+	  function d3_selection_value(value) {
+	    function valueNull() {
+	      delete this.value;
 	    }
 
-	    delete opt.highlight;
+	    function valueConstant() {
+	      if (this.value !== value) {
+	        this.value = value;
+	      }
+	    }
 
-	    if (!pending) { return done(); }
+	    function valueFunction() {
+	      var x = value.apply(this, arguments);
 
-	    for (; i < tokens.length; i++) {
-	      (function(token) {
-	        if (token.type !== 'code') {
-	          return --pending || done();
-	        }
-	        return highlight(token.text, token.lang, function(err, code) {
-	          if (err) { return done(err); }
-	          if (code == null || code === token.text) {
-	            return --pending || done();
-	          }
-	          token.text = code;
-	          token.escaped = true;
-	          --pending || done();
-	        });
-	      })(tokens[i]);
+	      if (x === null || x === undefined) {
+	        delete this.value;
+	      } else if (this.value !== x) {
+	        this.value = x;
+	      }
 	    }
 
-	    return;
+	    return value === null || value === undefined ? valueNull : typeof value === 'function' ? valueFunction : valueConstant;
 	  }
-	  try {
-	    opt = merge$3({}, marked.defaults, opt || {});
-	    checkSanitizeDeprecation$1(opt);
-	    return Parser_1.parse(Lexer_1.lex(src, opt), opt);
-	  } catch (e$1) {
-	    e$1.message += '\nPlease report this to https://github.com/markedjs/marked.';
-	    if ((opt || marked.defaults).silent) {
-	      return '<p>An error occurred:</p><pre>'
-	        + escape$4(e$1.message + '', true)
-	        + '</pre>';
-	    }
-	    throw e$1;
+
+	  if (arguments.length === 1) {
+	    return selection.property('value');
 	  }
+
+	  return selection.each(d3_selection_value(value));
 	}
 
-	/**
-	 * Options
-	 */
+	function utilKeybinding(namespace) {
+	  var _keybindings = {};
 
-	marked.options =
-	marked.setOptions = function(opt) {
-	  merge$3(marked.defaults, opt);
-	  changeDefaults(marked.defaults);
-	  return marked;
-	};
+	  function testBindings(d3_event, isCapturing) {
+	    var didMatch = false;
+	    var bindings = Object.keys(_keybindings).map(function (id) {
+	      return _keybindings[id];
+	    });
+	    var i, binding; // Most key shortcuts will accept either lower or uppercase ('h' or 'H'),
+	    // so we don't strictly match on the shift key, but we prioritize
+	    // shifted keybindings first, and fallback to unshifted only if no match.
+	    // (This lets us differentiate between '←'/'⇧←' or '⌘Z'/'⌘⇧Z')
+	    // priority match shifted keybindings first
 
-	marked.getDefaults = getDefaults;
+	    for (i = 0; i < bindings.length; i++) {
+	      binding = bindings[i];
+	      if (!binding.event.modifiers.shiftKey) continue; // no shift
 
-	marked.defaults = defaults$5;
+	      if (!!binding.capture !== isCapturing) continue;
 
-	/**
-	 * Use Extension
-	 */
+	      if (matches(d3_event, binding, true)) {
+	        binding.callback(d3_event);
+	        didMatch = true; // match a max of one binding per event
 
-	marked.use = function(extension) {
-	  var opts = merge$3({}, extension);
-	  if (extension.renderer) {
-	    var renderer = marked.defaults.renderer || new Renderer_1();
-	    var loop = function ( prop ) {
-	      var prevRenderer = renderer[prop];
-	      renderer[prop] = function () {
-	        var args = [], len = arguments.length;
-	        while ( len-- ) args[ len ] = arguments[ len ];
-
-	        var ret = extension.renderer[prop].apply(renderer, args);
-	        if (ret === false) {
-	          ret = prevRenderer.apply(renderer, args);
-	        }
-	        return ret;
-	      };
-	    };
+	        break;
+	      }
+	    }
 
-	    for (var prop in extension.renderer) loop( prop );
-	    opts.renderer = renderer;
-	  }
-	  if (extension.tokenizer) {
-	    var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();
-	    var loop$1 = function ( prop ) {
-	      var prevTokenizer = tokenizer[prop$1];
-	      tokenizer[prop$1] = function () {
-	        var args = [], len = arguments.length;
-	        while ( len-- ) args[ len ] = arguments[ len ];
-
-	        var ret = extension.tokenizer[prop$1].apply(tokenizer, args);
-	        if (ret === false) {
-	          ret = prevTokenizer.apply(tokenizer, args);
-	        }
-	        return ret;
-	      };
-	    };
+	    if (didMatch) return; // then unshifted keybindings
 
-	    for (var prop$1 in extension.tokenizer) loop$1( prop );
-	    opts.tokenizer = tokenizer;
-	  }
-	  marked.setOptions(opts);
-	};
+	    for (i = 0; i < bindings.length; i++) {
+	      binding = bindings[i];
+	      if (binding.event.modifiers.shiftKey) continue; // shift
 
-	/**
-	 * Expose
-	 */
+	      if (!!binding.capture !== isCapturing) continue;
 
-	marked.Parser = Parser_1;
-	marked.parser = Parser_1.parse;
+	      if (matches(d3_event, binding, false)) {
+	        binding.callback(d3_event);
+	        break;
+	      }
+	    }
 
-	marked.Renderer = Renderer_1;
-	marked.TextRenderer = TextRenderer_1;
+	    function matches(d3_event, binding, testShift) {
+	      var event = d3_event;
+	      var isMatch = false;
+	      var tryKeyCode = true; // Prefer a match on `KeyboardEvent.key`
 
-	marked.Lexer = Lexer_1;
-	marked.lexer = Lexer_1.lex;
+	      if (event.key !== undefined) {
+	        tryKeyCode = event.key.charCodeAt(0) > 255; // outside ISO-Latin-1
 
-	marked.Tokenizer = Tokenizer_1;
+	        isMatch = true;
 
-	marked.Slugger = Slugger_1;
+	        if (binding.event.key === undefined) {
+	          isMatch = false;
+	        } else if (Array.isArray(binding.event.key)) {
+	          if (binding.event.key.map(function (s) {
+	            return s.toLowerCase();
+	          }).indexOf(event.key.toLowerCase()) === -1) isMatch = false;
+	        } else {
+	          if (event.key.toLowerCase() !== binding.event.key.toLowerCase()) isMatch = false;
+	        }
+	      } // Fallback match on `KeyboardEvent.keyCode`, can happen if:
+	      // - browser doesn't support `KeyboardEvent.key`
+	      // - `KeyboardEvent.key` is outside ISO-Latin-1 range (cyrillic?)
 
-	marked.parse = marked;
 
-	var marked_1 = marked;
+	      if (!isMatch && tryKeyCode) {
+	        isMatch = event.keyCode === binding.event.keyCode;
+	      }
 
-	var tiler$2 = utilTiler();
-	var dispatch$3 = dispatch('loaded');
-	var _tileZoom$2 = 14;
-	var _osmoseUrlRoot = 'https://osmose.openstreetmap.fr/api/0.3';
-	var _osmoseData = { icons: {}, items: [] };
+	      if (!isMatch) return false; // test modifier keys
 
-	// This gets reassigned if reset
-	var _cache$2;
+	      if (!(event.ctrlKey && event.altKey)) {
+	        // if both are set, assume AltGr and skip it - #4096
+	        if (event.ctrlKey !== binding.event.modifiers.ctrlKey) return false;
+	        if (event.altKey !== binding.event.modifiers.altKey) return false;
+	      }
 
-	function abortRequest$2(controller) {
-	  if (controller) {
-	    controller.abort();
+	      if (event.metaKey !== binding.event.modifiers.metaKey) return false;
+	      if (testShift && event.shiftKey !== binding.event.modifiers.shiftKey) return false;
+	      return true;
+	    }
 	  }
-	}
 
-	function abortUnwantedRequests$2(cache, tiles) {
-	  Object.keys(cache.inflightTile).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) { return k === tile.id; });
-	    if (!wanted) {
-	      abortRequest$2(cache.inflightTile[k]);
-	      delete cache.inflightTile[k];
-	    }
-	  });
-	}
+	  function capture(d3_event) {
+	    testBindings(d3_event, true);
+	  }
 
-	function encodeIssueRtree$2(d) {
-	  return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-	}
+	  function bubble(d3_event) {
+	    var tagName = select(d3_event.target).node().tagName;
 
-	// Replace or remove QAItem from rtree
-	function updateRtree$2(item, replace) {
-	  _cache$2.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });
+	    if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
+	      return;
+	    }
 
-	  if (replace) {
-	    _cache$2.rtree.insert(item);
+	    testBindings(d3_event, false);
 	  }
-	}
 
-	// Issues shouldn't obscure eachother
-	function preventCoincident$1(loc) {
-	  var coincident = false;
-	  do {
-	    // first time, move marker up. after that, move marker right.
-	    var delta = coincident ? [0.00001, 0] : [0, 0.00001];
-	    loc = geoVecAdd(loc, delta);
-	    var bbox = geoExtent(loc).bbox();
-	    coincident = _cache$2.rtree.search(bbox).length;
-	  } while (coincident);
+	  function keybinding(selection) {
+	    selection = selection || select(document);
+	    selection.on('keydown.capture.' + namespace, capture, true);
+	    selection.on('keydown.bubble.' + namespace, bubble, false);
+	    return keybinding;
+	  } // was: keybinding.off()
 
-	  return loc;
-	}
 
-	var serviceOsmose = {
-	  title: 'osmose',
+	  keybinding.unbind = function (selection) {
+	    _keybindings = [];
+	    selection = selection || select(document);
+	    selection.on('keydown.capture.' + namespace, null);
+	    selection.on('keydown.bubble.' + namespace, null);
+	    return keybinding;
+	  };
 
-	  init: function init() {
-	    _mainFileFetcher.get('qa_data')
-	      .then(function (d) {
-	        _osmoseData = d.osmose;
-	        _osmoseData.items = Object.keys(d.osmose.icons)
-	          .map(function (s) { return s.split('-')[0]; })
-	          .reduce(function (unique, item) { return unique.indexOf(item) !== -1 ? unique : unique.concat( [item]); }, []);
-	      });
+	  keybinding.clear = function () {
+	    _keybindings = {};
+	    return keybinding;
+	  }; // Remove one or more keycode bindings.
 
-	    if (!_cache$2) {
-	      this.reset();
-	    }
 
-	    this.event = utilRebind(this, dispatch$3, 'on');
-	  },
+	  keybinding.off = function (codes, capture) {
+	    var arr = utilArrayUniq([].concat(codes));
 
-	  reset: function reset() {
-	    var _strings = {};
-	    var _colors = {};
-	    if (_cache$2) {
-	      Object.values(_cache$2.inflightTile).forEach(abortRequest$2);
-	      // Strings and colors are static and should not be re-populated
-	      _strings = _cache$2.strings;
-	      _colors = _cache$2.colors;
+	    for (var i = 0; i < arr.length; i++) {
+	      var id = arr[i] + (capture ? '-capture' : '-bubble');
+	      delete _keybindings[id];
 	    }
-	    _cache$2 = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush(),
-	      strings: _strings,
-	      colors: _colors
-	    };
-	  },
-
-	  loadIssues: function loadIssues(projection) {
-	    var this$1 = this;
-
-	    var params = {
-	      // Tiles return a maximum # of issues
-	      // So we want to filter our request for only types iD supports
-	      item: _osmoseData.items
-	    };
 
-	    // determine the needed tiles to cover the view
-	    var tiles = tiler$2
-	      .zoomExtent([_tileZoom$2, _tileZoom$2])
-	      .getTiles(projection);
-
-	    // abort inflight requests that are no longer needed
-	    abortUnwantedRequests$2(_cache$2, tiles);
+	    return keybinding;
+	  }; // Add one or more keycode bindings.
+
+
+	  keybinding.on = function (codes, callback, capture) {
+	    if (typeof callback !== 'function') {
+	      return keybinding.off(codes, capture);
+	    }
+
+	    var arr = utilArrayUniq([].concat(codes));
+
+	    for (var i = 0; i < arr.length; i++) {
+	      var id = arr[i] + (capture ? '-capture' : '-bubble');
+	      var binding = {
+	        id: id,
+	        capture: capture,
+	        callback: callback,
+	        event: {
+	          key: undefined,
+	          // preferred
+	          keyCode: 0,
+	          // fallback
+	          modifiers: {
+	            shiftKey: false,
+	            ctrlKey: false,
+	            altKey: false,
+	            metaKey: false
+	          }
+	        }
+	      };
 
-	    // issue new requests..
-	    tiles.forEach(function (tile) {
-	      if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) { return; }
+	      if (_keybindings[id]) {
+	        console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
+	      }
 
-	      var ref = tile.xyz;
-	      var x = ref[0];
-	      var y = ref[1];
-	      var z = ref[2];
-	      var url = _osmoseUrlRoot + "/issues/" + z + "/" + x + "/" + y + ".json?" + utilQsString(params);
+	      _keybindings[id] = binding;
+	      var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);
 
-	      var controller = new AbortController();
-	      _cache$2.inflightTile[tile.id] = controller;
+	      for (var j = 0; j < matches.length; j++) {
+	        // Normalise matching errors
+	        if (matches[j] === '++') matches[j] = '+';
 
-	      d3_json(url, { signal: controller.signal })
-	        .then(function (data) {
-	          delete _cache$2.inflightTile[tile.id];
-	          _cache$2.loadedTile[tile.id] = true;
-
-	          if (data.features) {
-	            data.features.forEach(function (issue) {
-	              var ref = issue.properties;
-	              var item = ref.item;
-	              var cl = ref.class;
-	              var id = ref.uuid;
-	              /* Osmose issues are uniquely identified by a unique
-	                `item` and `class` combination (both integer values) */
-	              var itemType = item + "-" + cl;
-
-	              // Filter out unsupported issue types (some are too specific or advanced)
-	              if (itemType in _osmoseData.icons) {
-	                var loc = issue.geometry.coordinates; // lon, lat
-	                loc = preventCoincident$1(loc);
-
-	                var d = new QAItem(loc, this$1, itemType, id, { item: item });
-
-	                // Setting elems here prevents UI detail requests
-	                if (item === 8300 || item === 8360) {
-	                  d.elems = [];
-	                }
+	        if (matches[j] in utilKeybinding.modifierCodes) {
+	          var prop = utilKeybinding.modifierProperties[utilKeybinding.modifierCodes[matches[j]]];
+	          binding.event.modifiers[prop] = true;
+	        } else {
+	          binding.event.key = utilKeybinding.keys[matches[j]] || matches[j];
 
-	                _cache$2.data[d.id] = d;
-	                _cache$2.rtree.insert(encodeIssueRtree$2(d));
-	              }
-	            });
+	          if (matches[j] in utilKeybinding.keyCodes) {
+	            binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
 	          }
+	        }
+	      }
+	    }
 
-	          dispatch$3.call('loaded');
-	        })
-	        .catch(function () {
-	          delete _cache$2.inflightTile[tile.id];
-	          _cache$2.loadedTile[tile.id] = true;
-	        });
-	    });
-	  },
+	    return keybinding;
+	  };
 
-	  loadIssueDetail: function loadIssueDetail(issue) {
-	    var this$1 = this;
+	  return keybinding;
+	}
+	/*
+	 * See https://github.com/keithamus/jwerty
+	 */
 
-	    // Issue details only need to be fetched once
-	    if (issue.elems !== undefined) {
-	      return Promise.resolve(issue);
+	utilKeybinding.modifierCodes = {
+	  // Shift key, ⇧
+	  '⇧': 16,
+	  shift: 16,
+	  // CTRL key, on Mac: ⌃
+	  '⌃': 17,
+	  ctrl: 17,
+	  // ALT key, on Mac: ⌥ (Alt)
+	  '⌥': 18,
+	  alt: 18,
+	  option: 18,
+	  // META, on Mac: ⌘ (CMD), on Windows (Win), on Linux (Super)
+	  '⌘': 91,
+	  meta: 91,
+	  cmd: 91,
+	  'super': 91,
+	  win: 91
+	};
+	utilKeybinding.modifierProperties = {
+	  16: 'shiftKey',
+	  17: 'ctrlKey',
+	  18: 'altKey',
+	  91: 'metaKey'
+	};
+	utilKeybinding.plusKeys = ['plus', 'ffplus', '=', 'ffequals', '≠', '±'];
+	utilKeybinding.minusKeys = ['_', '-', 'ffminus', 'dash', '–', '—'];
+	utilKeybinding.keys = {
+	  // Backspace key, on Mac: ⌫ (Backspace)
+	  '⌫': 'Backspace',
+	  backspace: 'Backspace',
+	  // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
+	  '⇥': 'Tab',
+	  '⇆': 'Tab',
+	  tab: 'Tab',
+	  // Return key, ↩
+	  '↩': 'Enter',
+	  '↵': 'Enter',
+	  '⏎': 'Enter',
+	  'return': 'Enter',
+	  enter: 'Enter',
+	  '⌅': 'Enter',
+	  // Pause/Break key
+	  'pause': 'Pause',
+	  'pause-break': 'Pause',
+	  // Caps Lock key, ⇪
+	  '⇪': 'CapsLock',
+	  caps: 'CapsLock',
+	  'caps-lock': 'CapsLock',
+	  // Escape key, on Mac: ⎋, on Windows: Esc
+	  '⎋': ['Escape', 'Esc'],
+	  escape: ['Escape', 'Esc'],
+	  esc: ['Escape', 'Esc'],
+	  // Space key
+	  space: [' ', 'Spacebar'],
+	  // Page-Up key, or pgup, on Mac: ↖
+	  '↖': 'PageUp',
+	  pgup: 'PageUp',
+	  'page-up': 'PageUp',
+	  // Page-Down key, or pgdown, on Mac: ↘
+	  '↘': 'PageDown',
+	  pgdown: 'PageDown',
+	  'page-down': 'PageDown',
+	  // END key, on Mac: ⇟
+	  '⇟': 'End',
+	  end: 'End',
+	  // HOME key, on Mac: ⇞
+	  '⇞': 'Home',
+	  home: 'Home',
+	  // Insert key, or ins
+	  ins: 'Insert',
+	  insert: 'Insert',
+	  // Delete key, on Mac: ⌦ (Delete)
+	  '⌦': ['Delete', 'Del'],
+	  del: ['Delete', 'Del'],
+	  'delete': ['Delete', 'Del'],
+	  // Left Arrow Key, or ←
+	  '←': ['ArrowLeft', 'Left'],
+	  left: ['ArrowLeft', 'Left'],
+	  'arrow-left': ['ArrowLeft', 'Left'],
+	  // Up Arrow Key, or ↑
+	  '↑': ['ArrowUp', 'Up'],
+	  up: ['ArrowUp', 'Up'],
+	  'arrow-up': ['ArrowUp', 'Up'],
+	  // Right Arrow Key, or →
+	  '→': ['ArrowRight', 'Right'],
+	  right: ['ArrowRight', 'Right'],
+	  'arrow-right': ['ArrowRight', 'Right'],
+	  // Up Arrow Key, or ↓
+	  '↓': ['ArrowDown', 'Down'],
+	  down: ['ArrowDown', 'Down'],
+	  'arrow-down': ['ArrowDown', 'Down'],
+	  // odities, stuff for backward compatibility (browsers and code):
+	  // Num-Multiply, or *
+	  '*': ['*', 'Multiply'],
+	  star: ['*', 'Multiply'],
+	  asterisk: ['*', 'Multiply'],
+	  multiply: ['*', 'Multiply'],
+	  // Num-Plus or +
+	  '+': ['+', 'Add'],
+	  'plus': ['+', 'Add'],
+	  // Num-Subtract, or -
+	  '-': ['-', 'Subtract'],
+	  subtract: ['-', 'Subtract'],
+	  'dash': ['-', 'Subtract'],
+	  // Semicolon
+	  semicolon: ';',
+	  // = or equals
+	  equals: '=',
+	  // Comma, or ,
+	  comma: ',',
+	  // Period, or ., or full-stop
+	  period: '.',
+	  'full-stop': '.',
+	  // Slash, or /, or forward-slash
+	  slash: '/',
+	  'forward-slash': '/',
+	  // Tick, or `, or back-quote
+	  tick: '`',
+	  'back-quote': '`',
+	  // Open bracket, or [
+	  'open-bracket': '[',
+	  // Back slash, or \
+	  'back-slash': '\\',
+	  // Close backet, or ]
+	  'close-bracket': ']',
+	  // Apostrophe, or Quote, or '
+	  quote: '\'',
+	  apostrophe: '\'',
+	  // NUMPAD 0-9
+	  'num-0': '0',
+	  'num-1': '1',
+	  'num-2': '2',
+	  'num-3': '3',
+	  'num-4': '4',
+	  'num-5': '5',
+	  'num-6': '6',
+	  'num-7': '7',
+	  'num-8': '8',
+	  'num-9': '9',
+	  // F1-F25
+	  f1: 'F1',
+	  f2: 'F2',
+	  f3: 'F3',
+	  f4: 'F4',
+	  f5: 'F5',
+	  f6: 'F6',
+	  f7: 'F7',
+	  f8: 'F8',
+	  f9: 'F9',
+	  f10: 'F10',
+	  f11: 'F11',
+	  f12: 'F12',
+	  f13: 'F13',
+	  f14: 'F14',
+	  f15: 'F15',
+	  f16: 'F16',
+	  f17: 'F17',
+	  f18: 'F18',
+	  f19: 'F19',
+	  f20: 'F20',
+	  f21: 'F21',
+	  f22: 'F22',
+	  f23: 'F23',
+	  f24: 'F24',
+	  f25: 'F25'
+	};
+	utilKeybinding.keyCodes = {
+	  // Backspace key, on Mac: ⌫ (Backspace)
+	  '⌫': 8,
+	  backspace: 8,
+	  // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
+	  '⇥': 9,
+	  '⇆': 9,
+	  tab: 9,
+	  // Return key, ↩
+	  '↩': 13,
+	  '↵': 13,
+	  '⏎': 13,
+	  'return': 13,
+	  enter: 13,
+	  '⌅': 13,
+	  // Pause/Break key
+	  'pause': 19,
+	  'pause-break': 19,
+	  // Caps Lock key, ⇪
+	  '⇪': 20,
+	  caps: 20,
+	  'caps-lock': 20,
+	  // Escape key, on Mac: ⎋, on Windows: Esc
+	  '⎋': 27,
+	  escape: 27,
+	  esc: 27,
+	  // Space key
+	  space: 32,
+	  // Page-Up key, or pgup, on Mac: ↖
+	  '↖': 33,
+	  pgup: 33,
+	  'page-up': 33,
+	  // Page-Down key, or pgdown, on Mac: ↘
+	  '↘': 34,
+	  pgdown: 34,
+	  'page-down': 34,
+	  // END key, on Mac: ⇟
+	  '⇟': 35,
+	  end: 35,
+	  // HOME key, on Mac: ⇞
+	  '⇞': 36,
+	  home: 36,
+	  // Insert key, or ins
+	  ins: 45,
+	  insert: 45,
+	  // Delete key, on Mac: ⌦ (Delete)
+	  '⌦': 46,
+	  del: 46,
+	  'delete': 46,
+	  // Left Arrow Key, or ←
+	  '←': 37,
+	  left: 37,
+	  'arrow-left': 37,
+	  // Up Arrow Key, or ↑
+	  '↑': 38,
+	  up: 38,
+	  'arrow-up': 38,
+	  // Right Arrow Key, or →
+	  '→': 39,
+	  right: 39,
+	  'arrow-right': 39,
+	  // Up Arrow Key, or ↓
+	  '↓': 40,
+	  down: 40,
+	  'arrow-down': 40,
+	  // odities, printing characters that come out wrong:
+	  // Firefox Equals
+	  'ffequals': 61,
+	  // Num-Multiply, or *
+	  '*': 106,
+	  star: 106,
+	  asterisk: 106,
+	  multiply: 106,
+	  // Num-Plus or +
+	  '+': 107,
+	  'plus': 107,
+	  // Num-Subtract, or -
+	  '-': 109,
+	  subtract: 109,
+	  // Firefox Plus
+	  'ffplus': 171,
+	  // Firefox Minus
+	  'ffminus': 173,
+	  // Semicolon
+	  ';': 186,
+	  semicolon: 186,
+	  // = or equals
+	  '=': 187,
+	  'equals': 187,
+	  // Comma, or ,
+	  ',': 188,
+	  comma: 188,
+	  // Dash / Underscore key
+	  'dash': 189,
+	  // Period, or ., or full-stop
+	  '.': 190,
+	  period: 190,
+	  'full-stop': 190,
+	  // Slash, or /, or forward-slash
+	  '/': 191,
+	  slash: 191,
+	  'forward-slash': 191,
+	  // Tick, or `, or back-quote
+	  '`': 192,
+	  tick: 192,
+	  'back-quote': 192,
+	  // Open bracket, or [
+	  '[': 219,
+	  'open-bracket': 219,
+	  // Back slash, or \
+	  '\\': 220,
+	  'back-slash': 220,
+	  // Close backet, or ]
+	  ']': 221,
+	  'close-bracket': 221,
+	  // Apostrophe, or Quote, or '
+	  '\'': 222,
+	  quote: 222,
+	  apostrophe: 222
+	}; // NUMPAD 0-9
+
+	var i$1 = 95,
+	    n = 0;
+
+	while (++i$1 < 106) {
+	  utilKeybinding.keyCodes['num-' + n] = i$1;
+	  ++n;
+	} // 0-9
+
+
+	i$1 = 47;
+	n = 0;
+
+	while (++i$1 < 58) {
+	  utilKeybinding.keyCodes[n] = i$1;
+	  ++n;
+	} // F1-F25
+
+
+	i$1 = 111;
+	n = 1;
+
+	while (++i$1 < 136) {
+	  utilKeybinding.keyCodes['f' + n] = i$1;
+	  ++n;
+	} // a-z
+
+
+	i$1 = 64;
+
+	while (++i$1 < 91) {
+	  utilKeybinding.keyCodes[String.fromCharCode(i$1).toLowerCase()] = i$1;
+	}
+
+	function utilObjectOmit(obj, omitKeys) {
+	  return Object.keys(obj).reduce(function (result, key) {
+	    if (omitKeys.indexOf(key) === -1) {
+	      result[key] = obj[key]; // keep
 	    }
 
-	    var url = _osmoseUrlRoot + "/issue/" + (issue.id) + "?langs=" + (_mainLocalizer.localeCode());
-	    var cacheDetails = function (data) {
-	      // Associated elements used for highlighting
-	      // Assign directly for immediate use in the callback
-	      issue.elems = data.elems.map(function (e) { return e.type.substring(0,1) + e.id; });
+	    return result;
+	  }, {});
+	}
 
-	      // Some issues have instance specific detail in a subtitle
-	      issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
+	// Copies a variable number of methods from source to target.
+	function utilRebind(target, source) {
+	  var i = 1,
+	      n = arguments.length,
+	      method;
 
-	      this$1.replaceItem(issue);
-	    };
+	  while (++i < n) {
+	    target[method = arguments[i]] = d3_rebind(target, source, source[method]);
+	  }
 
-	    return d3_json(url).then(cacheDetails).then(function () { return issue; });
-	  },
+	  return target;
+	} // Method is assumed to be a standard D3 getter-setter:
+	// If passed with no arguments, gets the value.
+	// If passed with arguments, sets the value and returns the target.
 
-	  loadStrings: function loadStrings(locale) {
-	    if ( locale === void 0 ) locale=_mainLocalizer.localeCode();
+	function d3_rebind(target, source, method) {
+	  return function () {
+	    var value = method.apply(source, arguments);
+	    return value === source ? target : value;
+	  };
+	}
 
-	    var items = Object.keys(_osmoseData.icons);
+	// A per-domain session mutex backed by a cookie and dead man's
+	// switch. If the session crashes, the mutex will auto-release
+	// after 5 seconds.
+	// This accepts a string and returns an object that complies with utilSessionMutexType
+	function utilSessionMutex(name) {
+	  var mutex = {};
+	  var intervalID;
 
-	    if (
-	      locale in _cache$2.strings
-	      && Object.keys(_cache$2.strings[locale]).length === items.length
-	    ) {
-	        return Promise.resolve(_cache$2.strings[locale]);
-	    }
+	  function renew() {
+	    var expires = new Date();
+	    expires.setSeconds(expires.getSeconds() + 5);
+	    document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
+	  }
 
-	    // May be partially populated already if some requests were successful
-	    if (!(locale in _cache$2.strings)) {
-	      _cache$2.strings[locale] = {};
-	    }
+	  mutex.lock = function () {
+	    if (intervalID) return true;
+	    var cookie = document.cookie.replace(new RegExp('(?:(?:^|.*;)\\s*' + name + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');
+	    if (cookie) return false;
+	    renew();
+	    intervalID = window.setInterval(renew, 4000);
+	    return true;
+	  };
 
-	    // Only need to cache strings for supported issue types
-	    // Using multiple individual item + class requests to reduce fetched data size
-	    var allRequests = items.map(function (itemType) {
-	      // No need to request data we already have
-	      if (itemType in _cache$2.strings[locale]) { return; }
+	  mutex.unlock = function () {
+	    if (!intervalID) return;
+	    document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
+	    clearInterval(intervalID);
+	    intervalID = null;
+	  };
 
-	      var cacheData = function (data) {
-	        // Bunch of nested single value arrays of objects
-	        var ref = data.categories;
-	        var cat = ref[0]; if ( cat === void 0 ) cat = {items:[]};
-	        var ref$1 = cat.items;
-	        var item = ref$1[0]; if ( item === void 0 ) item = {class:[]};
-	        var ref$2 = item.class;
-	        var cl = ref$2[0]; if ( cl === void 0 ) cl = null;
-
-	        // If null default value is reached, data wasn't as expected (or was empty)
-	        if (!cl) {
-	          /* eslint-disable no-console */
-	          console.log(("Osmose strings request (" + itemType + ") had unexpected data"));
-	          /* eslint-enable no-console */
-	          return;
-	        }
+	  mutex.locked = function () {
+	    return !!intervalID;
+	  };
 
-	        // Cache served item colors to automatically style issue markers later
-	        var itemInt = item.item;
-	        var color = item.color;
-	        if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
-	          _cache$2.colors[itemInt] = color;
-	        }
+	  return mutex;
+	}
 
-	        // Value of root key will be null if no string exists
-	        // If string exists, value is an object with key 'auto' for string
-	        var title = cl.title;
-	        var detail = cl.detail;
-	        var fix = cl.fix;
-	        var trap = cl.trap;
+	function utilTiler() {
+	  var _size = [256, 256];
+	  var _scale = 256;
+	  var _tileSize = 256;
+	  var _zoomExtent = [0, 20];
+	  var _translate = [_size[0] / 2, _size[1] / 2];
+	  var _margin = 0;
+	  var _skipNullIsland = false;
+
+	  function clamp(num, min, max) {
+	    return Math.max(min, Math.min(num, max));
+	  }
 
-	        // Osmose titles shouldn't contain markdown
-	        var issueStrings = {};
-	        if (title) { issueStrings.title = title.auto; }
-	        if (detail) { issueStrings.detail = marked_1(detail.auto); }
-	        if (trap) { issueStrings.trap = marked_1(trap.auto); }
-	        if (fix) { issueStrings.fix = marked_1(fix.auto); }
+	  function nearNullIsland(tile) {
+	    var x = tile[0];
+	    var y = tile[1];
+	    var z = tile[2];
 
-	        _cache$2.strings[locale][itemType] = issueStrings;
-	      };
+	    if (z >= 7) {
+	      var center = Math.pow(2, z - 1);
+	      var width = Math.pow(2, z - 6);
+	      var min = center - width / 2;
+	      var max = center + width / 2 - 1;
+	      return x >= min && x <= max && y >= min && y <= max;
+	    }
 
-	      var ref = itemType.split('-');
-	      var item = ref[0];
-	      var cl = ref[1];
+	    return false;
+	  }
 
-	      // Osmose API falls back to English strings where untranslated or if locale doesn't exist
-	      var url = _osmoseUrlRoot + "/items/" + item + "/class/" + cl + "?langs=" + locale;
+	  function tiler() {
+	    var z = geoScaleToZoom(_scale / (2 * Math.PI), _tileSize);
+	    var z0 = clamp(Math.round(z), _zoomExtent[0], _zoomExtent[1]);
+	    var tileMin = 0;
+	    var tileMax = Math.pow(2, z0) - 1;
+	    var log2ts = Math.log(_tileSize) * Math.LOG2E;
+	    var k = Math.pow(2, z - z0 + log2ts);
+	    var origin = [(_translate[0] - _scale / 2) / k, (_translate[1] - _scale / 2) / k];
+	    var cols = range(clamp(Math.floor(-origin[0]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[0] / k - origin[0]) + _margin, tileMin, tileMax + 1));
+	    var rows = range(clamp(Math.floor(-origin[1]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[1] / k - origin[1]) + _margin, tileMin, tileMax + 1));
+	    var tiles = [];
 
-	      return d3_json(url).then(cacheData);
-	    });
+	    for (var i = 0; i < rows.length; i++) {
+	      var y = rows[i];
 
-	    return Promise.all(allRequests).then(function () { return _cache$2.strings[locale]; });
-	  },
+	      for (var j = 0; j < cols.length; j++) {
+	        var x = cols[j];
 
-	  getStrings: function getStrings(itemType, locale) {
-	    if ( locale === void 0 ) locale=_mainLocalizer.localeCode();
+	        if (i >= _margin && i <= rows.length - _margin && j >= _margin && j <= cols.length - _margin) {
+	          tiles.unshift([x, y, z0]); // tiles in view at beginning
+	        } else {
+	          tiles.push([x, y, z0]); // tiles in margin at the end
+	        }
+	      }
+	    }
 
-	    // No need to fallback to English, Osmose API handles this for us
-	    return (locale in _cache$2.strings) ? _cache$2.strings[locale][itemType] : {};
-	  },
+	    tiles.translate = origin;
+	    tiles.scale = k;
+	    return tiles;
+	  }
+	  /**
+	   * getTiles() returns an array of tiles that cover the map view
+	   */
 
-	  getColor: function getColor(itemType) {
-	    return (itemType in _cache$2.colors) ? _cache$2.colors[itemType] : '#FFFFFF';
-	  },
 
-	  postUpdate: function postUpdate(issue, callback) {
-	    var this$1 = this;
+	  tiler.getTiles = function (projection) {
+	    var origin = [projection.scale() * Math.PI - projection.translate()[0], projection.scale() * Math.PI - projection.translate()[1]];
+	    this.size(projection.clipExtent()[1]).scale(projection.scale() * 2 * Math.PI).translate(projection.translate());
+	    var tiles = tiler();
+	    var ts = tiles.scale;
+	    return tiles.map(function (tile) {
+	      if (_skipNullIsland && nearNullIsland(tile)) {
+	        return false;
+	      }
 
-	    if (_cache$2.inflightPost[issue.id]) {
-	      return callback({ message: 'Issue update already inflight', status: -2 }, issue);
-	    }
+	      var x = tile[0] * ts - origin[0];
+	      var y = tile[1] * ts - origin[1];
+	      return {
+	        id: tile.toString(),
+	        xyz: tile,
+	        extent: geoExtent(projection.invert([x, y + ts]), projection.invert([x + ts, y]))
+	      };
+	    }).filter(Boolean);
+	  };
+	  /**
+	   * getGeoJSON() returns a FeatureCollection for debugging tiles
+	   */
 
-	    // UI sets the status to either 'done' or 'false'
-	    var url = _osmoseUrlRoot + "/issue/" + (issue.id) + "/" + (issue.newStatus);
-	    var controller = new AbortController();
-	    var after = function () {
-	      delete _cache$2.inflightPost[issue.id];
 
-	      this$1.removeItem(issue);
-	      if (issue.newStatus === 'done') {
-	        // Keep track of the number of issues closed per `item` to tag the changeset
-	        if (!(issue.item in _cache$2.closed)) {
-	          _cache$2.closed[issue.item] = 0;
+	  tiler.getGeoJSON = function (projection) {
+	    var features = tiler.getTiles(projection).map(function (tile) {
+	      return {
+	        type: 'Feature',
+	        properties: {
+	          id: tile.id,
+	          name: tile.id
+	        },
+	        geometry: {
+	          type: 'Polygon',
+	          coordinates: [tile.extent.polygon()]
 	        }
-	        _cache$2.closed[issue.item] += 1;
-	      }
-	      if (callback) { callback(null, issue); }
+	      };
+	    });
+	    return {
+	      type: 'FeatureCollection',
+	      features: features
 	    };
+	  };
 
-	    _cache$2.inflightPost[issue.id] = controller;
+	  tiler.tileSize = function (val) {
+	    if (!arguments.length) return _tileSize;
+	    _tileSize = val;
+	    return tiler;
+	  };
 
-	    fetch(url, { signal: controller.signal })
-	      .then(after)
-	      .catch(function (err) {
-	        delete _cache$2.inflightPost[issue.id];
-	        if (callback) { callback(err.message); }
-	      });
-	  },
+	  tiler.zoomExtent = function (val) {
+	    if (!arguments.length) return _zoomExtent;
+	    _zoomExtent = val;
+	    return tiler;
+	  };
 
-	  // Get all cached QAItems covering the viewport
-	  getItems: function getItems(projection) {
-	    var viewport = projection.clipExtent();
-	    var min = [viewport[0][0], viewport[1][1]];
-	    var max = [viewport[1][0], viewport[0][1]];
-	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	  tiler.size = function (val) {
+	    if (!arguments.length) return _size;
+	    _size = val;
+	    return tiler;
+	  };
 
-	    return _cache$2.rtree.search(bbox).map(function (d) { return d.data; });
-	  },
+	  tiler.scale = function (val) {
+	    if (!arguments.length) return _scale;
+	    _scale = val;
+	    return tiler;
+	  };
 
-	  // Get a QAItem from cache
-	  // NOTE: Don't change method name until UI v3 is merged
-	  getError: function getError(id) {
-	    return _cache$2.data[id];
-	  },
+	  tiler.translate = function (val) {
+	    if (!arguments.length) return _translate;
+	    _translate = val;
+	    return tiler;
+	  }; // number to extend the rows/columns beyond those covering the viewport
 
-	  // get the name of the icon to display for this item
-	  getIcon: function getIcon(itemType) {
-	    return _osmoseData.icons[itemType];
-	  },
 
-	  // Replace a single QAItem in the cache
-	  replaceItem: function replaceItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	  tiler.margin = function (val) {
+	    if (!arguments.length) return _margin;
+	    _margin = +val;
+	    return tiler;
+	  };
 
-	    _cache$2.data[item.id] = item;
-	    updateRtree$2(encodeIssueRtree$2(item), true); // true = replace
-	    return item;
-	  },
+	  tiler.skipNullIsland = function (val) {
+	    if (!arguments.length) return _skipNullIsland;
+	    _skipNullIsland = val;
+	    return tiler;
+	  };
 
-	  // Remove a single QAItem from the cache
-	  removeItem: function removeItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	  return tiler;
+	}
 
-	    delete _cache$2.data[item.id];
-	    updateRtree$2(encodeIssueRtree$2(item), false); // false = remove
-	  },
+	function utilTriggerEvent(target, type) {
+	  target.each(function () {
+	    var evt = document.createEvent('HTMLEvents');
+	    evt.initEvent(type, true, true);
+	    this.dispatchEvent(evt);
+	  });
+	}
 
-	  // Used to populate `closed:osmose:*` changeset tags
-	  getClosedCounts: function getClosedCounts() {
-	    return _cache$2.closed;
-	  },
+	var _mainLocalizer = coreLocalizer(); // singleton
 
-	  itemURL: function itemURL(item) {
-	    return ("https://osmose.openstreetmap.fr/en/error/" + (item.id));
-	  }
-	};
 
-	/*
-	    A standalone SVG element that contains only a `defs` sub-element. To be
-	    used once globally, since defs IDs must be unique within a document.
-	*/
-	function svgDefs(context) {
+	var _t = _mainLocalizer.t;
+	// coreLocalizer manages language and locale parameters including translated strings
+	//
 
-	    function drawDefs(selection) {
-	        var defs = selection.append('defs');
-
-	        // add markers
-	        defs
-	            .append('marker')
-	            .attr('id', 'ideditor-oneway-marker')
-	            .attr('viewBox', '0 0 10 5')
-	            .attr('refX', 2.5)
-	            .attr('refY', 2.5)
-	            .attr('markerWidth', 2)
-	            .attr('markerHeight', 2)
-	            .attr('markerUnits', 'strokeWidth')
-	            .attr('orient', 'auto')
-	            .append('path')
-	            .attr('class', 'oneway-marker-path')
-	            .attr('d', 'M 5,3 L 0,3 L 0,2 L 5,2 L 5,0 L 10,2.5 L 5,5 z')
-	            .attr('stroke', 'none')
-	            .attr('fill', '#000')
-	            .attr('opacity', '0.75');
-
-	        // SVG markers have to be given a colour where they're defined
-	        // (they can't inherit it from the line they're attached to),
-	        // so we need to manually define markers for each color of tag
-	        // (also, it's slightly nicer if we can control the
-	        // positioning for different tags)
-	        function addSidedMarker(name, color, offset) {
-	            defs
-	                .append('marker')
-	                .attr('id', 'ideditor-sided-marker-' + name)
-	                .attr('viewBox', '0 0 2 2')
-	                .attr('refX', 1)
-	                .attr('refY', -offset)
-	                .attr('markerWidth', 1.5)
-	                .attr('markerHeight', 1.5)
-	                .attr('markerUnits', 'strokeWidth')
-	                .attr('orient', 'auto')
-	                .append('path')
-	                .attr('class', 'sided-marker-path sided-marker-' + name + '-path')
-	                .attr('d', 'M 0,0 L 1,1 L 2,0 z')
-	                .attr('stroke', 'none')
-	                .attr('fill', color);
-	        }
-	        addSidedMarker('natural', 'rgb(170, 170, 170)', 0);
-	        // for a coastline, the arrows are (somewhat unintuitively) on
-	        // the water side, so let's color them blue (with a gap) to
-	        // give a stronger indication
-	        addSidedMarker('coastline', '#77dede', 1);
-	        addSidedMarker('waterway', '#77dede', 1);
-	        // barriers have a dashed line, and separating the triangle
-	        // from the line visually suits that
-	        addSidedMarker('barrier', '#ddd', 1);
-	        addSidedMarker('man_made', '#fff', 0);
-
-	        defs
-	            .append('marker')
-	            .attr('id', 'ideditor-viewfield-marker')
-	            .attr('viewBox', '0 0 16 16')
-	            .attr('refX', 8)
-	            .attr('refY', 16)
-	            .attr('markerWidth', 4)
-	            .attr('markerHeight', 4)
-	            .attr('markerUnits', 'strokeWidth')
-	            .attr('orient', 'auto')
-	            .append('path')
-	            .attr('class', 'viewfield-marker-path')
-	            .attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z')
-	            .attr('fill', '#333')
-	            .attr('fill-opacity', '0.75')
-	            .attr('stroke', '#fff')
-	            .attr('stroke-width', '0.5px')
-	            .attr('stroke-opacity', '0.75');
-
-	        defs
-	            .append('marker')
-	            .attr('id', 'ideditor-viewfield-marker-wireframe')
-	            .attr('viewBox', '0 0 16 16')
-	            .attr('refX', 8)
-	            .attr('refY', 16)
-	            .attr('markerWidth', 4)
-	            .attr('markerHeight', 4)
-	            .attr('markerUnits', 'strokeWidth')
-	            .attr('orient', 'auto')
-	            .append('path')
-	            .attr('class', 'viewfield-marker-path')
-	            .attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z')
-	            .attr('fill', 'none')
-	            .attr('stroke', '#fff')
-	            .attr('stroke-width', '0.5px')
-	            .attr('stroke-opacity', '0.75');
-
-	        // add patterns
-	        var patterns = defs.selectAll('pattern')
-	            .data([
-	                // pattern name, pattern image name
-	                ['beach', 'dots'],
-	                ['construction', 'construction'],
-	                ['cemetery', 'cemetery'],
-	                ['cemetery_christian', 'cemetery_christian'],
-	                ['cemetery_buddhist', 'cemetery_buddhist'],
-	                ['cemetery_muslim', 'cemetery_muslim'],
-	                ['cemetery_jewish', 'cemetery_jewish'],
-	                ['farmland', 'farmland'],
-	                ['farmyard', 'farmyard'],
-	                ['forest', 'forest'],
-	                ['forest_broadleaved', 'forest_broadleaved'],
-	                ['forest_needleleaved', 'forest_needleleaved'],
-	                ['forest_leafless', 'forest_leafless'],
-	                ['golf_green', 'grass'],
-	                ['grass', 'grass'],
-	                ['landfill', 'landfill'],
-	                ['meadow', 'grass'],
-	                ['orchard', 'orchard'],
-	                ['pond', 'pond'],
-	                ['quarry', 'quarry'],
-	                ['scrub', 'bushes'],
-	                ['vineyard', 'vineyard'],
-	                ['water_standing', 'lines'],
-	                ['waves', 'waves'],
-	                ['wetland', 'wetland'],
-	                ['wetland_marsh', 'wetland_marsh'],
-	                ['wetland_swamp', 'wetland_swamp'],
-	                ['wetland_bog', 'wetland_bog'],
-	                ['wetland_reedbed', 'wetland_reedbed']
-	            ])
-	            .enter()
-	            .append('pattern')
-	            .attr('id', function (d) { return 'ideditor-pattern-' + d[0]; })
-	            .attr('width', 32)
-	            .attr('height', 32)
-	            .attr('patternUnits', 'userSpaceOnUse');
-
-	        patterns
-	            .append('rect')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('width', 32)
-	            .attr('height', 32)
-	            .attr('class', function (d) { return 'pattern-color-' + d[0]; });
-
-	        patterns
-	            .append('image')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('width', 32)
-	            .attr('height', 32)
-	            .attr('xlink:href', function (d) {
-	                return context.imagePath('pattern/' + d[1] + '.png');
-	            });
+	function coreLocalizer() {
+	  var localizer = {};
+	  var _dataLanguages = {}; // `_dataLocales` is an object containing all _supported_ locale codes -> language info.
+	  // * `rtl` - right-to-left or left-to-right text direction
+	  // * `pct` - the percent of strings translated; 1 = 100%, full coverage
+	  //
+	  // {
+	  // en: { rtl: false, pct: {…} },
+	  // de: { rtl: false, pct: {…} },
+	  // …
+	  // }
 
-	        // add clip paths
-	        defs.selectAll('clipPath')
-	            .data([12, 18, 20, 32, 45])
-	            .enter()
-	            .append('clipPath')
-	            .attr('id', function (d) { return 'ideditor-clip-square-' + d; })
-	            .append('rect')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('width', function (d) { return d; })
-	            .attr('height', function (d) { return d; });
+	  var _dataLocales = {}; // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
+	  // {
+	  // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+	  // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+	  // …
+	  // }
 
-	        // add symbol spritesheets
-	        defs
-	            .call(drawDefs.addSprites, [
-	                'iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'tnp-sprite', 'community-sprite'
-	            ], true);
-	    }
+	  var _localeStrings = {}; // the current locale
 
+	  var _localeCode = 'en-US'; // `_localeCodes` must contain `_localeCode` first, optionally followed by fallbacks
 
-	    drawDefs.addSprites = function(selection, ids, overrideColors) {
-	        var spritesheets = selection.selectAll('.spritesheet');
-	        var currData = spritesheets.data();
-	        var data = utilArrayUniq(currData.concat(ids));
+	  var _localeCodes = ['en-US', 'en'];
+	  var _languageCode = 'en';
+	  var _textDirection = 'ltr';
+	  var _usesMetric = false;
+	  var _languageNames = {};
+	  var _scriptNames = {}; // getters for the current locale parameters
 
-	        spritesheets
-	            .data(data)
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'spritesheet spritesheet-' + d; })
-	            .each(function(d) {
-	                var url = context.imagePath(d + '.svg');
-	                var node = select(this).node();
-
-	                svg(url)
-	                    .then(function(svg) {
-	                        node.appendChild(
-	                            select(svg.documentElement).attr('id', 'ideditor-' + d).node()
-	                        );
-	                        if (overrideColors && d !== 'iD-sprite') {   // allow icon colors to be overridden..
-	                            select(node).selectAll('path')
-	                                .attr('fill', 'currentColor');
-	                        }
-	                    })
-	                    .catch(function() {
-	                        /* ignore */
-	                    });
-	            });
-	    };
+	  localizer.localeCode = function () {
+	    return _localeCode;
+	  };
 
+	  localizer.localeCodes = function () {
+	    return _localeCodes;
+	  };
 
-	    return drawDefs;
-	}
+	  localizer.languageCode = function () {
+	    return _languageCode;
+	  };
 
-	/* global Mapillary:false */
+	  localizer.textDirection = function () {
+	    return _textDirection;
+	  };
 
+	  localizer.usesMetric = function () {
+	    return _usesMetric;
+	  };
 
-	var apibase = 'https://a.mapillary.com/v3/';
-	var viewercss = 'mapillary-js/mapillary.min.css';
-	var viewerjs = 'mapillary-js/mapillary.min.js';
-	var clientId = 'NzNRM2otQkR2SHJzaXJmNmdQWVQ0dzo1ZWYyMmYwNjdmNDdlNmVi';
-	var mapFeatureConfig = {
-	    values: [
-	        'construction--flat--crosswalk-plain',
-	        'marking--discrete--crosswalk-zebra',
-	        'object--banner',
-	        'object--bench',
-	        'object--bike-rack',
-	        'object--billboard',
-	        'object--catch-basin',
-	        'object--cctv-camera',
-	        'object--fire-hydrant',
-	        'object--mailbox',
-	        'object--manhole',
-	        'object--phone-booth',
-	        'object--sign--advertisement',
-	        'object--sign--information',
-	        'object--sign--store',
-	        'object--street-light',
-	        'object--support--utility-pole',
-	        'object--traffic-light--*',
-	        'object--traffic-light--pedestrians',
-	        'object--trash-can'
-	    ].join(',')
-	};
-	var maxResults = 1000;
-	var tileZoom = 14;
-	var tiler$3 = utilTiler().zoomExtent([tileZoom, tileZoom]).skipNullIsland(true);
-	var dispatch$4 = dispatch('loadedImages', 'loadedSigns', 'loadedMapFeatures', 'bearingChanged');
-	var _mlyFallback = false;
-	var _mlyCache;
-	var _mlyClicks;
-	var _mlySelectedImageKey;
-	var _mlyViewer;
+	  localizer.languageNames = function () {
+	    return _languageNames;
+	  };
 
+	  localizer.scriptNames = function () {
+	    return _scriptNames;
+	  }; // The client app may want to manually set the locale, regardless of the
+	  // settings provided by the browser
 
-	function abortRequest$3(controller) {
-	    controller.abort();
-	}
 
+	  var _preferredLocaleCodes = [];
 
-	function maxPageAtZoom(z) {
-	    if (z < 15)   { return 2; }
-	    if (z === 15) { return 5; }
-	    if (z === 16) { return 10; }
-	    if (z === 17) { return 20; }
-	    if (z === 18) { return 40; }
-	    if (z > 18)   { return 80; }
-	}
+	  localizer.preferredLocaleCodes = function (codes) {
+	    if (!arguments.length) return _preferredLocaleCodes;
 
+	    if (typeof codes === 'string') {
+	      // be generous and accept delimited strings as input
+	      _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
+	    } else {
+	      _preferredLocaleCodes = codes;
+	    }
 
-	function loadTiles(which, url, projection) {
-	    var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-	    var tiles = tiler$3.getTiles(projection);
+	    return localizer;
+	  };
 
-	    // abort inflight requests that are no longer needed
-	    var cache = _mlyCache[which];
-	    Object.keys(cache.inflight).forEach(function(k) {
-	        var wanted = tiles.find(function(tile) { return k.indexOf(tile.id + ',') === 0; });
-	        if (!wanted) {
-	            abortRequest$3(cache.inflight[k]);
-	            delete cache.inflight[k];
-	        }
-	    });
+	  var _loadPromise;
 
-	    tiles.forEach(function(tile) {
-	        loadNextTilePage(which, currZoom, url, tile);
-	    });
-	}
+	  localizer.ensureLoaded = function () {
+	    if (_loadPromise) return _loadPromise;
+	    return _loadPromise = Promise.all([// load the list of languages
+	    _mainFileFetcher.get('languages'), // load the list of supported locales
+	    _mainFileFetcher.get('locales')]).then(function (results) {
+	      _dataLanguages = results[0];
+	      _dataLocales = results[1];
+	    }).then(function () {
+	      var requestedLocales = (_preferredLocaleCodes || []). // List of locales preferred by the browser in priority order.
+	      concat(utilDetect().browserLocales) // fallback to English since it's the only guaranteed complete language
+	      .concat(['en']);
 
+	      _localeCodes = localesToUseFrom(requestedLocales); // Run iD in the highest-priority locale; the rest are fallbacks
 
-	function loadNextTilePage(which, currZoom, url, tile) {
-	    var cache = _mlyCache[which];
-	    var rect = tile.extent.rectangle();
-	    var maxPages = maxPageAtZoom(currZoom);
-	    var nextPage = cache.nextPage[tile.id] || 0;
-	    var nextURL = cache.nextURL[tile.id] || url +
-	        utilQsString({
-	            per_page: maxResults,
-	            page: nextPage,
-	            client_id: clientId,
-	            bbox: [rect[0], rect[1], rect[2], rect[3]].join(','),
-	        });
+	      _localeCode = _localeCodes[0]; // Will always return the index for `en` if nothing else
 
-	    if (nextPage > maxPages) { return; }
+	      var fullCoverageIndex = _localeCodes.findIndex(function (locale) {
+	        return _dataLocales[locale].pct === 1;
+	      }); // We only need to load locales up until we find one with full coverage
 
-	    var id = tile.id + ',' + String(nextPage);
-	    if (cache.loaded[id] || cache.inflight[id]) { return; }
 
-	    var controller = new AbortController();
-	    cache.inflight[id] = controller;
+	      var loadStringsPromises = _localeCodes.slice(0, fullCoverageIndex + 1).map(function (code) {
+	        return localizer.loadLocale(code);
+	      });
 
-	    var options = {
-	        method: 'GET',
-	        signal: controller.signal,
-	        headers: { 'Content-Type': 'application/json' }
-	    };
+	      return Promise.all(loadStringsPromises);
+	    }).then(function () {
+	      updateForCurrentLocale();
+	    })["catch"](function (err) {
+	      return console.error(err);
+	    }); // eslint-disable-line
+	  }; // Returns the locales from `requestedLocales` supported by iD that we should use
 
-	    fetch(nextURL, options)
-	        .then(function(response) {
-	            if (!response.ok) {
-	                throw new Error(response.status + ' ' + response.statusText);
-	            }
-	            var linkHeader = response.headers.get('Link');
-	            if (linkHeader) {
-	                var pagination = parsePagination(linkHeader);
-	                if (pagination.next) {
-	                    cache.nextURL[tile.id] = pagination.next;
-	                }
-	            }
-	            return response.json();
-	        })
-	        .then(function(data) {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	            if (!data || !data.features || !data.features.length) {
-	                throw new Error('No Data');
-	            }
 
-	            var features = data.features.map(function(feature) {
-	                var loc = feature.geometry.coordinates;
-	                var d;
-
-	                // An image (shown as a green dot on the map) is a single street photo with extra
-	                // information such as location, camera angle (CA), camera model, and so on.
-	                // Each image feature is a GeoJSON Point
-	                if (which === 'images') {
-	                    d = {
-	                        loc: loc,
-	                        key: feature.properties.key,
-	                        ca: feature.properties.ca,
-	                        captured_at: feature.properties.captured_at,
-	                        captured_by: feature.properties.username,
-	                        pano: feature.properties.pano
-	                    };
-
-	                    cache.forImageKey[d.key] = d;     // cache imageKey -> image
-
-	                // Mapillary organizes images as sequences. A sequence of images are continuously captured
-	                // by a user at a give time. Sequences are shown on the map as green lines.
-	                // Each sequence feature is a GeoJSON LineString
-	                } else if (which === 'sequences') {
-	                    var sequenceKey = feature.properties.key;
-	                    cache.lineString[sequenceKey] = feature;           // cache sequenceKey -> lineString
-	                    feature.properties.coordinateProperties.image_keys.forEach(function(imageKey) {
-	                        cache.forImageKey[imageKey] = sequenceKey;     // cache imageKey -> sequenceKey
-	                    });
-	                    return false;    // because no `d` data worth loading into an rbush
-
-	                // An image detection is a semantic pixel area on an image. The area could indicate
-	                // sky, trees, sidewalk in the image. A detection can be a polygon, a bounding box, or a point.
-	                // Each image_detection feature is a GeoJSON Point (located where the image was taken)
-	                } else if (which === 'image_detections') {
-	                    d = {
-	                        key: feature.properties.key,
-	                        image_key: feature.properties.image_key,
-	                        value: feature.properties.value,
-	                        package: feature.properties.package,
-	                        shape: feature.properties.shape
-	                    };
-
-	                    // cache imageKey -> image_detections
-	                    if (!cache.forImageKey[d.image_key]) {
-	                        cache.forImageKey[d.image_key] = [];
-	                    }
-	                    cache.forImageKey[d.image_key].push(d);
-	                    return false;    // because no `d` data worth loading into an rbush
-
-
-	                // A map feature is a real world object that can be shown on a map. It could be any object
-	                // recognized from images, manually added in images, or added on the map.
-	                // Each map feature is a GeoJSON Point (located where the feature is)
-	                } else if (which === 'map_features' || which === 'points') {
-	                    d = {
-	                        loc: loc,
-	                        key: feature.properties.key,
-	                        value: feature.properties.value,
-	                        package: feature.properties.package,
-	                        detections: feature.properties.detections
-	                    };
-	                }
+	  function localesToUseFrom(requestedLocales) {
+	    var supportedLocales = _dataLocales;
+	    var toUse = [];
 
-	                return {
-	                    minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-	                };
+	    for (var i in requestedLocales) {
+	      var locale = requestedLocales[i];
+	      if (supportedLocales[locale]) toUse.push(locale);
 
-	            }).filter(Boolean);
+	      if (locale.includes('-')) {
+	        // Full locale ('es-ES'), add fallback to the base ('es')
+	        var langPart = locale.split('-')[0];
+	        if (supportedLocales[langPart]) toUse.push(langPart);
+	      }
+	    } // remove duplicates
 
-	            if (cache.rtree && features) {
-	                cache.rtree.load(features);
-	            }
 
-	            if (data.features.length === maxResults) {  // more pages to load
-	                cache.nextPage[tile.id] = nextPage + 1;
-	                loadNextTilePage(which, currZoom, url, tile);
-	            } else {
-	                cache.nextPage[tile.id] = Infinity;     // no more pages to load
-	            }
+	    return utilArrayUniq(toUse);
+	  }
 
-	            if (which === 'images' || which === 'sequences') {
-	                dispatch$4.call('loadedImages');
-	            } else if (which === 'map_features') {
-	                dispatch$4.call('loadedSigns');
-	            } else if (which === 'points') {
-	                dispatch$4.call('loadedMapFeatures');
-	            }
-	        })
-	        .catch(function() {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	        });
-	}
+	  function updateForCurrentLocale() {
+	    if (!_localeCode) return;
+	    _languageCode = _localeCode.split('-')[0];
+	    var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
+	    var hash = utilStringQs(window.location.hash);
 
-	// extract links to pages of API results
-	function parsePagination(links) {
-	    return links.split(',').map(function(rel) {
-	        var elements = rel.split(';');
-	        if (elements.length === 2) {
-	            return [
-	                /<(.+)>/.exec(elements[0])[1],
-	                /rel="(.+)"/.exec(elements[1])[1]
-	            ];
-	        } else {
-	            return ['',''];
-	        }
-	    }).reduce(function(pagination, val) {
-	        pagination[val[1]] = val[0];
-	        return pagination;
-	    }, {});
-	}
+	    if (hash.rtl === 'true') {
+	      _textDirection = 'rtl';
+	    } else if (hash.rtl === 'false') {
+	      _textDirection = 'ltr';
+	    } else {
+	      _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
+	    }
 
+	    var locale = _localeCode;
+	    if (locale.toLowerCase() === 'en-us') locale = 'en';
+	    _languageNames = _localeStrings[locale].languageNames;
+	    _scriptNames = _localeStrings[locale].scriptNames;
+	    _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
+	  }
+	  /* Locales */
+	  // Returns a Promise to load the strings for the requested locale
 
-	// partition viewport into higher zoom tiles
-	function partitionViewport(projection) {
-	    var z = geoScaleToZoom(projection.scale());
-	    var z2 = (Math.ceil(z * 2) / 2) + 2.5;   // round to next 0.5 and add 2.5
-	    var tiler = utilTiler().zoomExtent([z2, z2]);
 
-	    return tiler.getTiles(projection)
-	        .map(function(tile) { return tile.extent; });
-	}
+	  localizer.loadLocale = function (requested) {
+	    if (!_dataLocales) {
+	      return Promise.reject('loadLocale called before init');
+	    }
 
+	    var locale = requested; // US English is the default
 
-	// no more than `limit` results per partition.
-	function searchLimited(limit, projection, rtree) {
-	    limit = limit || 5;
+	    if (locale.toLowerCase() === 'en-us') locale = 'en';
 
-	    return partitionViewport(projection)
-	        .reduce(function(result, extent) {
-	            var found = rtree.search(extent.bbox())
-	                .slice(0, limit)
-	                .map(function(d) { return d.data; });
+	    if (!_dataLocales[locale]) {
+	      return Promise.reject("Unsupported locale: ".concat(requested));
+	    }
 
-	            return (found.length ? result.concat(found) : result);
-	        }, []);
-	}
+	    if (_localeStrings[locale]) {
+	      // already loaded
+	      return Promise.resolve(locale);
+	    }
 
+	    var fileMap = _mainFileFetcher.fileMap();
+	    var key = "locale_".concat(locale);
+	    fileMap[key] = "locales/".concat(locale, ".json");
+	    return _mainFileFetcher.get(key).then(function (d) {
+	      _localeStrings[locale] = d[locale];
+	      return locale;
+	    });
+	  };
 
+	  localizer.pluralRule = function (number) {
+	    return pluralRule(number, _localeCode);
+	  }; // Returns the plural rule for the given `number` with the given `localeCode`.
+	  // One of: `zero`, `one`, `two`, `few`, `many`, `other`
 
-	var serviceMapillary = {
 
-	    init: function() {
-	        if (!_mlyCache) {
-	            this.reset();
-	        }
+	  function pluralRule(number, localeCode) {
+	    // modern browsers have this functionality built-in
+	    var rules = 'Intl' in window && Intl.PluralRules && new Intl.PluralRules(localeCode);
 
-	        this.event = utilRebind(this, dispatch$4, 'on');
-	    },
+	    if (rules) {
+	      return rules.select(number);
+	    } // fallback to basic one/other, as in English
 
-	    reset: function() {
-	        if (_mlyCache) {
-	            Object.values(_mlyCache.images.inflight).forEach(abortRequest$3);
-	            Object.values(_mlyCache.image_detections.inflight).forEach(abortRequest$3);
-	            Object.values(_mlyCache.map_features.inflight).forEach(abortRequest$3);
-	            Object.values(_mlyCache.points.inflight).forEach(abortRequest$3);
-	            Object.values(_mlyCache.sequences.inflight).forEach(abortRequest$3);
-	        }
-
-	        _mlyCache = {
-	            images: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush(), forImageKey: {} },
-	            image_detections: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, forImageKey: {} },
-	            map_features: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush() },
-	            points: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush() },
-	            sequences: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush(), forImageKey: {}, lineString: {} }
-	        };
 
-	        _mlySelectedImageKey = null;
-	        _mlyClicks = [];
-	    },
+	    if (number === 1) return 'one';
+	    return 'other';
+	  }
+	  /**
+	  * Try to find that string in `locale` or the current `_localeCode` matching
+	  * the given `stringId`. If no string can be found in the requested locale,
+	  * we'll recurse down all the `_localeCodes` until one is found.
+	  *
+	  * @param  {string}   stringId      string identifier
+	  * @param  {object?}  replacements  token replacements and default string
+	  * @param  {string?}  locale        locale to use (defaults to currentLocale)
+	  * @return {string?}  localized string
+	  */
 
 
-	    images: function(projection) {
-	        var limit = 5;
-	        return searchLimited(limit, projection, _mlyCache.images.rtree);
-	    },
+	  localizer.tInfo = function (stringId, replacements, locale) {
+	    locale = locale || _localeCode;
+	    var path = stringId.split('.').map(function (s) {
+	      return s.replace(/<TX_DOT>/g, '.');
+	    }).reverse();
+	    var stringsKey = locale; // US English is the default
 
+	    if (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
+	    var result = _localeStrings[stringsKey];
 
-	    signs: function(projection) {
-	        var limit = 5;
-	        return searchLimited(limit, projection, _mlyCache.map_features.rtree);
-	    },
+	    while (result !== undefined && path.length) {
+	      result = result[path.pop()];
+	    }
 
+	    if (result !== undefined) {
+	      if (replacements) {
+	        if (_typeof(result) === 'object' && Object.keys(result).length) {
+	          // If plural forms are provided, dig one level deeper based on the
+	          // first numeric token replacement provided.
+	          var number = Object.values(replacements).find(function (value) {
+	            return typeof value === 'number';
+	          });
 
-	    mapFeatures: function(projection) {
-	        var limit = 5;
-	        return searchLimited(limit, projection, _mlyCache.points.rtree);
-	    },
+	          if (number !== undefined) {
+	            var rule = pluralRule(number, locale);
 
+	            if (result[rule]) {
+	              result = result[rule];
+	            } else {
+	              // We're pretty sure this should be a plural but no string
+	              // could be found for the given rule. Just pick the first
+	              // string and hope it makes sense.
+	              result = Object.values(result)[0];
+	            }
+	          }
+	        }
 
-	    cachedImage: function(imageKey) {
-	        return _mlyCache.images.forImageKey[imageKey];
-	    },
+	        if (typeof result === 'string') {
+	          for (var key in replacements) {
+	            var value = replacements[key];
 
+	            if (typeof value === 'number' && value.toLocaleString) {
+	              // format numbers for the locale
+	              value = value.toLocaleString(locale, {
+	                style: 'decimal',
+	                useGrouping: true,
+	                minimumFractionDigits: 0
+	              });
+	            }
 
-	    sequences: function(projection) {
-	        var viewport = projection.clipExtent();
-	        var min = [viewport[0][0], viewport[1][1]];
-	        var max = [viewport[1][0], viewport[0][1]];
-	        var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-	        var sequenceKeys = {};
+	            var token = "{".concat(key, "}");
+	            var regex = new RegExp(token, 'g');
+	            result = result.replace(regex, value);
+	          }
+	        }
+	      }
 
-	        // all sequences for images in viewport
-	        _mlyCache.images.rtree.search(bbox)
-	            .forEach(function(d) {
-	                var sequenceKey = _mlyCache.sequences.forImageKey[d.data.key];
-	                if (sequenceKey) {
-	                    sequenceKeys[sequenceKey] = true;
-	                }
-	            });
+	      if (typeof result === 'string') {
+	        // found a localized string!
+	        return {
+	          text: result,
+	          locale: locale
+	        };
+	      }
+	    } // no localized string found...
+	    // attempt to fallback to a lower-priority language
 
-	        // Return lineStrings for the sequences
-	        return Object.keys(sequenceKeys).map(function(sequenceKey) {
-	            return _mlyCache.sequences.lineString[sequenceKey];
-	        });
-	    },
 
+	    var index = _localeCodes.indexOf(locale);
 
-	    signsSupported: function() {
-	        return true;
-	    },
+	    if (index >= 0 && index < _localeCodes.length - 1) {
+	      // eventually this will be 'en' or another locale with 100% coverage
+	      var fallback = _localeCodes[index + 1];
+	      return localizer.tInfo(stringId, replacements, fallback);
+	    }
+
+	    if (replacements && 'default' in replacements) {
+	      // Fallback to a default value if one is specified in `replacements`
+	      return {
+	        text: replacements["default"],
+	        locale: null
+	      };
+	    }
 
+	    var missing = "Missing ".concat(locale, " translation: ").concat(stringId);
+	    if (typeof console !== 'undefined') console.error(missing); // eslint-disable-line
 
-	    loadImages: function(projection) {
-	        loadTiles('images', apibase + 'images?sort_by=key&', projection);
-	        loadTiles('sequences', apibase + 'sequences?sort_by=key&', projection);
-	    },
+	    return {
+	      text: missing,
+	      locale: 'en'
+	    };
+	  }; // Returns only the localized text, discarding the locale info
 
 
-	    loadSigns: function(projection) {
-	        // if we are looking at signs, we'll actually need to fetch images too
-	        loadTiles('images', apibase + 'images?sort_by=key&', projection);
-	        loadTiles('map_features', apibase + 'map_features?layers=trafficsigns&min_nbr_image_detections=2&sort_by=key&', projection);
-	        loadTiles('image_detections', apibase + 'image_detections?layers=trafficsigns&sort_by=key&', projection);
-	    },
+	  localizer.t = function (stringId, replacements, locale) {
+	    return localizer.tInfo(stringId, replacements, locale).text;
+	  }; // Returns the localized text wrapped in an HTML element encoding the locale info
 
 
-	    loadMapFeatures: function(projection) {
-	        // if we are looking at signs, we'll actually need to fetch images too
-	        loadTiles('images', apibase + 'images?sort_by=key', projection);
-	        loadTiles('points', apibase + 'map_features?layers=points&min_nbr_image_detections=2&sort_by=key&values=' + mapFeatureConfig.values + '&', projection);
-	        loadTiles('image_detections', apibase + 'image_detections?layers=points&sort_by=key&values=' + mapFeatureConfig.values + '&', projection);
-	    },
+	  localizer.t.html = function (stringId, replacements, locale) {
+	    var info = localizer.tInfo(stringId, replacements, locale); // text may be empty or undefined if `replacements.default` is
 
+	    return info.text ? localizer.htmlForLocalizedText(info.text, info.locale) : '';
+	  };
 
-	    loadViewer: function(context) {
-	        // add mly-wrapper
-	        var wrap = context.container().select('.photoviewer')
-	            .selectAll('.mly-wrapper')
-	            .data([0]);
+	  localizer.htmlForLocalizedText = function (text, localeCode) {
+	    return "<span class=\"localized-text\" lang=\"".concat(localeCode || 'unknown', "\">").concat(text, "</span>");
+	  };
 
-	        wrap.enter()
-	            .append('div')
-	            .attr('id', 'ideditor-mly')
-	            .attr('class', 'photo-wrapper mly-wrapper')
-	            .classed('hide', true);
+	  localizer.languageName = function (code, options) {
+	    if (_languageNames[code]) {
+	      // name in locale language
+	      // e.g. "German"
+	      return _languageNames[code];
+	    } // sometimes we only want the local name
 
-	        // load mapillary-viewercss
-	        select('head').selectAll('#ideditor-mapillary-viewercss')
-	            .data([0])
-	            .enter()
-	            .append('link')
-	            .attr('id', 'ideditor-mapillary-viewercss')
-	            .attr('rel', 'stylesheet')
-	            .attr('href', context.asset(viewercss));
 
-	        // load mapillary-viewerjs
-	        select('head').selectAll('#ideditor-mapillary-viewerjs')
-	            .data([0])
-	            .enter()
-	            .append('script')
-	            .attr('id', 'ideditor-mapillary-viewerjs')
-	            .attr('src', context.asset(viewerjs));
-
-	        // load mapillary signs sprite
-	        var defs = context.container().select('defs');
-	        defs.call(svgDefs(context).addSprites, ['mapillary-sprite', 'mapillary-object-sprite'], false /* don't override colors */ );
-
-	        // Register viewer resize handler
-	        context.ui().photoviewer.on('resize.mapillary', function() {
-	            if (_mlyViewer) {
-	                _mlyViewer.resize();
-	            }
+	    if (options && options.localOnly) return null;
+	    var langInfo = _dataLanguages[code];
+
+	    if (langInfo) {
+	      if (langInfo.nativeName) {
+	        // name in native language
+	        // e.g. "Deutsch (de)"
+	        return localizer.t('translate.language_and_code', {
+	          language: langInfo.nativeName,
+	          code: code
 	        });
-	    },
+	      } else if (langInfo.base && langInfo.script) {
+	        var base = langInfo.base; // the code of the language this is based on
 
+	        if (_languageNames[base]) {
+	          // base language name in locale language
+	          var scriptCode = langInfo.script;
+	          var script = _scriptNames[scriptCode] || scriptCode; // e.g. "Serbian (Cyrillic)"
 
-	    showViewer: function(context) {
-	        var wrap = context.container().select('.photoviewer')
-	            .classed('hide', false);
+	          return localizer.t('translate.language_and_code', {
+	            language: _languageNames[base],
+	            code: script
+	          });
+	        } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
+	          // e.g. "српски (sr-Cyrl)"
+	          return localizer.t('translate.language_and_code', {
+	            language: _dataLanguages[base].nativeName,
+	            code: code
+	          });
+	        }
+	      }
+	    }
 
-	        var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();
+	    return code; // if not found, use the code
+	  };
 
-	        if (isHidden && _mlyViewer) {
-	            wrap
-	                .selectAll('.photo-wrapper:not(.mly-wrapper)')
-	                .classed('hide', true);
+	  return localizer;
+	}
 
-	            wrap
-	                .selectAll('.photo-wrapper.mly-wrapper')
-	                .classed('hide', false);
+	// `presetCollection` is a wrapper around an `Array` of presets `collection`,
+	// and decorated with some extra methods for searching and matching geometry
+	//
 
-	            _mlyViewer.resize();
-	        }
+	function presetCollection(collection) {
+	  var MAXRESULTS = 50;
+	  var _this = {};
+	  var _memo = {};
+	  _this.collection = collection;
 
-	        return this;
-	    },
+	  _this.item = function (id) {
+	    if (_memo[id]) return _memo[id];
 
+	    var found = _this.collection.find(function (d) {
+	      return d.id === id;
+	    });
 
-	    hideViewer: function(context) {
-	        _mlySelectedImageKey = null;
+	    if (found) _memo[id] = found;
+	    return found;
+	  };
 
-	        if (!_mlyFallback && _mlyViewer) {
-	            _mlyViewer.getComponent('sequence').stop();
-	        }
+	  _this.index = function (id) {
+	    return _this.collection.findIndex(function (d) {
+	      return d.id === id;
+	    });
+	  };
 
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(null); }
+	  _this.matchGeometry = function (geometry) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return d.matchGeometry(geometry);
+	    }));
+	  };
 
-	        viewer
-	            .classed('hide', true)
-	            .selectAll('.photo-wrapper')
-	            .classed('hide', true);
+	  _this.matchAllGeometry = function (geometries) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return d && d.matchAllGeometry(geometries);
+	    }));
+	  };
 
-	        context.container().selectAll('.viewfield-group, .sequence, .icon-detected')
-	            .classed('currentView', false);
+	  _this.matchAnyGeometry = function (geometries) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return geometries.some(function (geom) {
+	        return d.matchGeometry(geom);
+	      });
+	    }));
+	  };
 
-	        return this.setStyles(context, null, true);
-	    },
+	  _this.fallback = function (geometry) {
+	    var id = geometry;
+	    if (id === 'vertex') id = 'point';
+	    return _this.item(id);
+	  };
 
+	  _this.search = function (value, geometry, countryCode) {
+	    if (!value) return _this;
+	    value = value.toLowerCase().trim(); // match at name beginning or just after a space (e.g. "office" -> match "Law Office")
 
-	    parsePagination: parsePagination,
+	    function leading(a) {
+	      var index = a.indexOf(value);
+	      return index === 0 || a[index - 1] === ' ';
+	    } // match at name beginning only
 
 
-	    updateViewer: function(context, imageKey) {
-	        if (!imageKey) { return this; }
+	    function leadingStrict(a) {
+	      var index = a.indexOf(value);
+	      return index === 0;
+	    }
 
-	        if (!_mlyViewer) {
-	            this.initViewer(context, imageKey);
-	        } else {
-	            _mlyViewer.moveToKey(imageKey)
-	                .catch(function(e) { console.error('mly3', e); });  // eslint-disable-line no-console
-	        }
+	    function sortNames(a, b) {
+	      var aCompare = (a.suggestion ? a.originalName : a.name()).toLowerCase();
+	      var bCompare = (b.suggestion ? b.originalName : b.name()).toLowerCase(); // priority if search string matches preset name exactly - #4325
 
-	        return this;
-	    },
+	      if (value === aCompare) return -1;
+	      if (value === bCompare) return 1; // priority for higher matchScore
 
+	      var i = b.originalScore - a.originalScore;
+	      if (i !== 0) return i; // priority if search string appears earlier in preset name
 
-	    initViewer: function(context, imageKey) {
-	        var that = this;
-	        if (window.Mapillary && imageKey) {
-	            var opts = {
-	                baseImageSize: 320,
-	                component: {
-	                    cover: false,
-	                    keyboard: false,
-	                    tag: true
-	                }
-	            };
+	      i = aCompare.indexOf(value) - bCompare.indexOf(value);
+	      if (i !== 0) return i; // priority for shorter preset names
 
-	            // Disable components requiring WebGL support
-	            if (!Mapillary.isSupported() && Mapillary.isFallbackSupported()) {
-	                _mlyFallback = true;
-	                opts.component = {
-	                    cover: false,
-	                    direction: false,
-	                    imagePlane: false,
-	                    keyboard: false,
-	                    mouse: false,
-	                    sequence: false,
-	                    tag: false,
-	                    image: true,        // fallback
-	                    navigation: true    // fallback
-	                };
-	            }
+	      return aCompare.length - bCompare.length;
+	    }
 
-	            _mlyViewer = new Mapillary.Viewer('ideditor-mly', clientId, null, opts);
-	            _mlyViewer.on('nodechanged', nodeChanged);
-	            _mlyViewer.on('bearingchanged', bearingChanged);
-	            _mlyViewer.moveToKey(imageKey)
-	                .catch(function(e) { console.error('mly3', e); });  // eslint-disable-line no-console
-	        }
-
-	        // nodeChanged: called after the viewer has changed images and is ready.
-	        //
-	        // There is some logic here to batch up clicks into a _mlyClicks array
-	        // because the user might click on a lot of markers quickly and nodechanged
-	        // may be called out of order asychronously.
-	        //
-	        // Clicks are added to the array in `selectedImage` and removed here.
-	        //
-	        function nodeChanged(node) {
-	            if (!_mlyFallback) {
-	                _mlyViewer.getComponent('tag').removeAll();  // remove previous detections
-	            }
+	    var pool = _this.collection;
 
-	            var clicks = _mlyClicks;
-	            var index = clicks.indexOf(node.key);
-	            var selectedKey = _mlySelectedImageKey;
+	    if (countryCode) {
+	      pool = pool.filter(function (a) {
+	        if (a.countryCodes && a.countryCodes.indexOf(countryCode) === -1) return false;
+	        if (a.notCountryCodes && a.notCountryCodes.indexOf(countryCode) !== -1) return false;
+	        return true;
+	      });
+	    }
 
-	            if (index > -1) {              // `nodechanged` initiated from clicking on a marker..
-	                clicks.splice(index, 1);   // remove the click
-	                // If `node.key` matches the current _mlySelectedImageKey, call `selectImage()`
-	                // one more time to update the detections and attribution..
-	                if (node.key === selectedKey) {
-	                    that.selectImage(context, _mlySelectedImageKey, true);
-	                }
-	            } else {             // `nodechanged` initiated from the Mapillary viewer controls..
-	                var loc = node.computedLatLon ? [node.computedLatLon.lon, node.computedLatLon.lat] : [node.latLon.lon, node.latLon.lat];
-	                context.map().centerEase(loc);
-	                that.selectImage(context, node.key, true);
-	            }
-	        }
+	    var searchable = pool.filter(function (a) {
+	      return a.searchable !== false && a.suggestion !== true;
+	    });
+	    var suggestions = pool.filter(function (a) {
+	      return a.suggestion === true;
+	    }); // matches value to preset.name
 
-	        function bearingChanged(e) {
-	            dispatch$4.call('bearingChanged', undefined, e);
-	        }
-	    },
+	    var leading_name = searchable.filter(function (a) {
+	      return leading(a.name().toLowerCase());
+	    }).sort(sortNames); // matches value to preset suggestion name (original name is unhyphenated)
 
+	    var leading_suggestions = suggestions.filter(function (a) {
+	      return leadingStrict(a.originalName.toLowerCase());
+	    }).sort(sortNames); // matches value to preset.terms values
 
-	    // Pass in the image key string as `imageKey`.
-	    // This allows images to be selected from places that dont have access
-	    // to the full image datum (like the street signs layer or the js viewer)
-	    selectImage: function(context, imageKey, fromViewer) {
+	    var leading_terms = searchable.filter(function (a) {
+	      return (a.terms() || []).some(leading);
+	    }); // matches value to preset.tags values
 
-	        _mlySelectedImageKey = imageKey;
+	    var leading_tag_values = searchable.filter(function (a) {
+	      return Object.values(a.tags || {}).filter(function (val) {
+	        return val !== '*';
+	      }).some(leading);
+	    }); // finds close matches to value in preset.name
 
-	        // Note the datum could be missing, but we'll try to carry on anyway.
-	        // There just might be a delay before user sees detections, captured_at, etc.
-	        var d = _mlyCache.images.forImageKey[imageKey];
+	    var similar_name = searchable.map(function (a) {
+	      return {
+	        preset: a,
+	        dist: utilEditDistance(value, a.name())
+	      };
+	    }).filter(function (a) {
+	      return a.dist + Math.min(value.length - a.preset.name().length, 0) < 3;
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    }).map(function (a) {
+	      return a.preset;
+	    }); // finds close matches to value to preset suggestion name (original name is unhyphenated)
+
+	    var similar_suggestions = suggestions.map(function (a) {
+	      return {
+	        preset: a,
+	        dist: utilEditDistance(value, a.originalName.toLowerCase())
+	      };
+	    }).filter(function (a) {
+	      return a.dist + Math.min(value.length - a.preset.originalName.length, 0) < 1;
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    }).map(function (a) {
+	      return a.preset;
+	    }); // finds close matches to value in preset.terms
+
+	    var similar_terms = searchable.filter(function (a) {
+	      return (a.terms() || []).some(function (b) {
+	        return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
+	      });
+	    });
+	    var results = leading_name.concat(leading_suggestions, leading_terms, leading_tag_values, similar_name, similar_suggestions, similar_terms).slice(0, MAXRESULTS - 1);
 
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(d); }
+	    if (geometry) {
+	      if (typeof geometry === 'string') {
+	        results.push(_this.fallback(geometry));
+	      } else {
+	        geometry.forEach(function (geom) {
+	          return results.push(_this.fallback(geom));
+	        });
+	      }
+	    }
 
-	        imageKey = (d && d.key) || imageKey;
-	        if (!fromViewer && imageKey) {
-	            _mlyClicks.push(imageKey);
-	        }
+	    return presetCollection(utilArrayUniq(results));
+	  };
 
-	        this.setStyles(context, null, true);
+	  return _this;
+	}
 
-	        // if signs signs are shown, highlight the ones that appear in this image
-	        context.container().selectAll('.layer-mapillary-signs .icon-detected')
-	            .classed('currentView', function(d) {
-	                return d.detections.some(function(detection) {
-	                    return detection.image_key === imageKey;
-	                });
-	            });
+	// `presetCategory` builds a `presetCollection` of member presets,
+	// decorated with some extra methods for searching and matching geometry
+	//
 
-	        if (d) {
-	            this.updateDetections(d);
-	        }
+	function presetCategory(categoryID, category, all) {
+	  var _this = Object.assign({}, category); // shallow copy
 
-	        return this;
-	    },
 
+	  _this.id = categoryID;
+	  _this.members = presetCollection(category.members.map(function (presetID) {
+	    return all.item(presetID);
+	  }).filter(Boolean));
+	  _this.geometry = _this.members.collection.reduce(function (acc, preset) {
+	    for (var i in preset.geometry) {
+	      var geometry = preset.geometry[i];
+
+	      if (acc.indexOf(geometry) === -1) {
+	        acc.push(geometry);
+	      }
+	    }
 
-	    getSelectedImageKey: function() {
-	        return _mlySelectedImageKey;
-	    },
+	    return acc;
+	  }, []);
 
+	  _this.matchGeometry = function (geom) {
+	    return _this.geometry.indexOf(geom) >= 0;
+	  };
 
-	    getSequenceKeyForImageKey: function(imageKey) {
-	        return _mlyCache.sequences.forImageKey[imageKey];
-	    },
+	  _this.matchAllGeometry = function (geometries) {
+	    return _this.members.collection.some(function (preset) {
+	      return preset.matchAllGeometry(geometries);
+	    });
+	  };
 
+	  _this.matchScore = function () {
+	    return -1;
+	  };
 
-	    // Updates the currently highlighted sequence and selected bubble.
-	    // Reset is only necessary when interacting with the viewport because
-	    // this implicitly changes the currently selected bubble/sequence
-	    setStyles: function(context, hovered, reset) {
-	        if (reset) {  // reset all layers
-	            context.container().selectAll('.viewfield-group')
-	                .classed('highlighted', false)
-	                .classed('hovered', false)
-	                .classed('currentView', false);
+	  _this.name = function () {
+	    return _t("presets.categories.".concat(categoryID, ".name"), {
+	      'default': categoryID
+	    });
+	  };
 
-	            context.container().selectAll('.sequence')
-	                .classed('highlighted', false)
-	                .classed('currentView', false);
-	        }
+	  _this.nameLabel = function () {
+	    return _t.html("presets.categories.".concat(categoryID, ".name"), {
+	      'default': categoryID
+	    });
+	  };
 
-	        var hoveredImageKey = hovered && hovered.key;
-	        var hoveredSequenceKey = hoveredImageKey && this.getSequenceKeyForImageKey(hoveredImageKey);
-	        var hoveredLineString = hoveredSequenceKey && _mlyCache.sequences.lineString[hoveredSequenceKey];
-	        var hoveredImageKeys = (hoveredLineString && hoveredLineString.properties.coordinateProperties.image_keys) || [];
+	  _this.terms = function () {
+	    return [];
+	  };
 
-	        var selectedImageKey = _mlySelectedImageKey;
-	        var selectedSequenceKey = selectedImageKey && this.getSequenceKeyForImageKey(selectedImageKey);
-	        var selectedLineString = selectedSequenceKey && _mlyCache.sequences.lineString[selectedSequenceKey];
-	        var selectedImageKeys = (selectedLineString && selectedLineString.properties.coordinateProperties.image_keys) || [];
+	  return _this;
+	}
 
-	        // highlight sibling viewfields on either the selected or the hovered sequences
-	        var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
+	// `presetField` decorates a given `field` Object
+	// with some extra methods for searching and matching geometry
+	//
 
-	        context.container().selectAll('.layer-mapillary .viewfield-group')
-	            .classed('highlighted', function(d) { return highlightedImageKeys.indexOf(d.key) !== -1; })
-	            .classed('hovered', function(d) { return d.key === hoveredImageKey; })
-	            .classed('currentView', function(d) { return d.key === selectedImageKey; });
+	function presetField(fieldID, field) {
+	  var _this = Object.assign({}, field); // shallow copy
 
-	        context.container().selectAll('.layer-mapillary .sequence')
-	            .classed('highlighted', function(d) { return d.properties.key === hoveredSequenceKey; })
-	            .classed('currentView', function(d) { return d.properties.key === selectedSequenceKey; });
 
-	        // update viewfields if needed
-	        context.container().selectAll('.viewfield-group .viewfield')
-	            .attr('d', viewfieldPath);
+	  _this.id = fieldID; // for use in classes, element ids, css selectors
 
-	        function viewfieldPath() {
-	            var d = this.parentNode.__data__;
-	            if (d.pano && d.key !== selectedImageKey) {
-	                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	            } else {
-	                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-	            }
-	        }
+	  _this.safeid = utilSafeClassName(fieldID);
 
-	        return this;
-	    },
+	  _this.matchGeometry = function (geom) {
+	    return !_this.geometry || _this.geometry.indexOf(geom) !== -1;
+	  };
 
+	  _this.matchAllGeometry = function (geometries) {
+	    return !_this.geometry || geometries.every(function (geom) {
+	      return _this.geometry.indexOf(geom) !== -1;
+	    });
+	  };
 
-	    updateDetections: function(d) {
-	        if (!_mlyViewer || _mlyFallback) { return; }
+	  _this.t = function (scope, options) {
+	    return _t("presets.fields.".concat(fieldID, ".").concat(scope), options);
+	  };
 
-	        var imageKey = d && d.key;
-	        if (!imageKey) { return; }
+	  _this.t.html = function (scope, options) {
+	    return _t.html("presets.fields.".concat(fieldID, ".").concat(scope), options);
+	  };
 
-	        var detections = _mlyCache.image_detections.forImageKey[imageKey] || [];
-	        detections.forEach(function(data) {
-	            var tag = makeTag(data);
-	            if (tag) {
-	                var tagComponent = _mlyViewer.getComponent('tag');
-	                tagComponent.add([tag]);
-	            }
-	        });
+	  _this.title = function () {
+	    return _this.overrideLabel || _this.t('label', {
+	      'default': fieldID
+	    });
+	  };
 
-	        function makeTag(data) {
-	            var valueParts = data.value.split('--');
-	            if (valueParts.length !== 3) { return; }
-
-	            var text = valueParts[1].replace(/-/g, ' ');
-	            var tag;
-
-	            // Currently only two shapes <Polygon|Point>
-	            if (data.shape.type === 'Polygon') {
-	                var polygonGeometry = new Mapillary
-	                    .TagComponent
-	                    .PolygonGeometry(data.shape.coordinates[0]);
-
-	                tag = new Mapillary.TagComponent.OutlineTag(
-	                    data.key,
-	                    polygonGeometry,
-	                    {
-	                        text: text,
-	                        textColor: 0xffff00,
-	                        lineColor: 0xffff00,
-	                        lineWidth: 2,
-	                        fillColor: 0xffff00,
-	                        fillOpacity: 0.3,
-	                    }
-	                );
+	  _this.label = function () {
+	    return _this.overrideLabel || _this.t.html('label', {
+	      'default': fieldID
+	    });
+	  };
 
-	            } else if (data.shape.type === 'Point') {
-	                var pointGeometry = new Mapillary
-	                    .TagComponent
-	                    .PointGeometry(data.shape.coordinates[0]);
-
-	                tag = new Mapillary.TagComponent.SpotTag(
-	                    data.key,
-	                    pointGeometry,
-	                    {
-	                        text: text,
-	                        color: 0xffff00,
-	                        textColor: 0xffff00
-	                    }
-	                );
-	            }
+	  var _placeholder = _this.placeholder;
 
-	            return tag;
-	        }
-	    },
+	  _this.placeholder = function () {
+	    return _this.t('placeholder', {
+	      'default': _placeholder
+	    });
+	  };
 
+	  _this.originalTerms = (_this.terms || []).join();
 
-	    cache: function() {
-	        return _mlyCache;
-	    }
+	  _this.terms = function () {
+	    return _this.t('terms', {
+	      'default': _this.originalTerms
+	    }).toLowerCase().trim().split(/\s*,+\s*/);
+	  };
 
-	};
+	  _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
+	  return _this;
+	}
 
-	function validationIssue(attrs) {
-	    this.type = attrs.type;                // required - name of rule that created the issue (e.g. 'missing_tag')
-	    this.subtype = attrs.subtype;          // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
-	    this.severity = attrs.severity;        // required - 'warning' or 'error'
-	    this.message = attrs.message;          // required - function returning localized string
-	    this.reference = attrs.reference;      // optional - function(selection) to render reference information
-	    this.entityIds = attrs.entityIds;      // optional - array of IDs of entities involved in the issue
-	    this.loc = attrs.loc;                  // optional - [lon, lat] to zoom in on to see the issue
-	    this.data = attrs.data;                // optional - object containing extra data for the fixes
-	    this.dynamicFixes = attrs.dynamicFixes;// optional - function(context) returning fixes
-	    this.hash = attrs.hash;                // optional - string to further differentiate the issue
+	// `Array.prototype.lastIndexOf` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof
+	_export({ target: 'Array', proto: true, forced: arrayLastIndexOf !== [].lastIndexOf }, {
+	  lastIndexOf: arrayLastIndexOf
+	});
 
-	    this.id = generateID.apply(this);      // generated - see below
-	    this.autoFix = null;                   // generated - if autofix exists, will be set below
+	// `presetPreset` decorates a given `preset` Object
+	// with some extra methods for searching and matching geometry
+	//
 
-	    // A unique, deterministic string hash.
-	    // Issues with identical id values are considered identical.
-	    function generateID() {
-	        var parts = [this.type];
+	function presetPreset(presetID, preset, addable, allFields, allPresets) {
+	  allFields = allFields || {};
+	  allPresets = allPresets || {};
 
-	        if (this.hash) {   // subclasses can pass in their own differentiator
-	            parts.push(this.hash);
-	        }
+	  var _this = Object.assign({}, preset); // shallow copy
 
-	        if (this.subtype) {
-	            parts.push(this.subtype);
-	        }
 
-	        // include the entities this issue is for
-	        // (sort them so the id is deterministic)
-	        if (this.entityIds) {
-	            var entityKeys = this.entityIds.slice().sort();
-	            parts.push.apply(parts, entityKeys);
-	        }
+	  var _addable = addable || false;
 
-	        return parts.join(':');
-	    }
+	  var _resolvedFields; // cache
 
-	    this.extent = function(resolver) {
-	        if (this.loc) {
-	            return geoExtent(this.loc);
-	        }
-	        if (this.entityIds && this.entityIds.length) {
-	            return this.entityIds.reduce(function(extent, entityId) {
-	                return extent.extend(resolver.entity(entityId).extent(resolver));
-	            }, geoExtent());
-	        }
-	        return null;
-	    };
 
-	    this.fixes = function(context) {
-	        var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
-	        var issue = this;
+	  var _resolvedMoreFields; // cache
 
-	        if (issue.severity === 'warning') {
-	            // allow ignoring any issue that's not an error
-	            fixes.push(new validationIssueFix({
-	                title: _t('issues.fix.ignore_issue.title'),
-	                icon: 'iD-icon-close',
-	                onClick: function() {
-	                    context.validator().ignoreIssue(this.issue.id);
-	                }
-	            }));
-	        }
 
-	        fixes.forEach(function(fix) {
-	            fix.id = fix.title;
-	            // add a reference to the issue for use in actions
-	            fix.issue = issue;
-	            if (fix.autoArgs) {
-	                issue.autoFix = fix;
-	            }
-	        });
-	        return fixes;
-	    };
+	  _this.id = presetID;
+	  _this.safeid = utilSafeClassName(presetID); // for use in css classes, selectors, element ids
 
-	}
+	  _this.originalTerms = (_this.terms || []).join();
+	  _this.originalName = _this.name || '';
+	  _this.originalScore = _this.matchScore || 1;
+	  _this.originalReference = _this.reference || {};
+	  _this.originalFields = _this.fields || [];
+	  _this.originalMoreFields = _this.moreFields || [];
 
+	  _this.fields = function () {
+	    return _resolvedFields || (_resolvedFields = resolve('fields'));
+	  };
 
-	function validationIssueFix(attrs) {
-	    this.title = attrs.title;                   // Required
-	    this.onClick = attrs.onClick;               // Optional - the function to run to apply the fix
-	    this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
-	    this.icon = attrs.icon;                     // Optional - shows 'iD-icon-wrench' if not set
-	    this.entityIds = attrs.entityIds || [];     // Optional - used for hover-higlighting.
-	    this.autoArgs = attrs.autoArgs;             // Optional - pass [actions, annotation] arglist if this fix can automatically run
+	  _this.moreFields = function () {
+	    return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
+	  };
 
-	    this.issue = null;    // Generated link - added by validationIssue
-	}
+	  _this.resetFields = function () {
+	    return _resolvedFields = _resolvedMoreFields = null;
+	  };
 
-	var buildRuleChecks = function() {
-	    return {
-	        equals: function (equals) {
-	            return function(tags) {
-	                return Object.keys(equals).every(function(k) {
-	                    return equals[k] === tags[k];
-	                });
-	            };
-	        },
-	        notEquals: function (notEquals) {
-	            return function(tags) {
-	                return Object.keys(notEquals).some(function(k) {
-	                    return notEquals[k] !== tags[k];
-	                });
-	            };
-	        },
-	        absence: function(absence) {
-	            return function(tags) {
-	                return Object.keys(tags).indexOf(absence) === -1;
-	            };
-	        },
-	        presence: function(presence) {
-	            return function(tags) {
-	                return Object.keys(tags).indexOf(presence) > -1;
-	            };
-	        },
-	        greaterThan: function(greaterThan) {
-	            var key = Object.keys(greaterThan)[0];
-	            var value = greaterThan[key];
+	  _this.tags = _this.tags || {};
+	  _this.addTags = _this.addTags || _this.tags;
+	  _this.removeTags = _this.removeTags || _this.addTags;
+	  _this.geometry = _this.geometry || [];
 
-	            return function(tags) {
-	                return tags[key] > value;
-	            };
-	        },
-	        greaterThanEqual: function(greaterThanEqual) {
-	            var key = Object.keys(greaterThanEqual)[0];
-	            var value = greaterThanEqual[key];
+	  _this.matchGeometry = function (geom) {
+	    return _this.geometry.indexOf(geom) >= 0;
+	  };
 
-	            return function(tags) {
-	                return tags[key] >= value;
-	            };
-	        },
-	        lessThan: function(lessThan) {
-	            var key = Object.keys(lessThan)[0];
-	            var value = lessThan[key];
+	  _this.matchAllGeometry = function (geoms) {
+	    return geoms.every(_this.matchGeometry);
+	  };
 
-	            return function(tags) {
-	                return tags[key] < value;
-	            };
-	        },
-	        lessThanEqual: function(lessThanEqual) {
-	            var key = Object.keys(lessThanEqual)[0];
-	            var value = lessThanEqual[key];
+	  _this.matchScore = function (entityTags) {
+	    var tags = _this.tags;
+	    var seen = {};
+	    var score = 0; // match on tags
 
-	            return function(tags) {
-	                return tags[key] <= value;
-	            };
-	        },
-	        positiveRegex: function(positiveRegex) {
-	            var tagKey = Object.keys(positiveRegex)[0];
-	            var expression = positiveRegex[tagKey].join('|');
-	            var regex = new RegExp(expression);
+	    for (var k in tags) {
+	      seen[k] = true;
 
-	            return function(tags) {
-	                return regex.test(tags[tagKey]);
-	            };
-	        },
-	        negativeRegex: function(negativeRegex) {
-	            var tagKey = Object.keys(negativeRegex)[0];
-	            var expression = negativeRegex[tagKey].join('|');
-	            var regex = new RegExp(expression);
+	      if (entityTags[k] === tags[k]) {
+	        score += _this.originalScore;
+	      } else if (tags[k] === '*' && k in entityTags) {
+	        score += _this.originalScore / 2;
+	      } else {
+	        return -1;
+	      }
+	    } // boost score for additional matches in addTags - #6802
 
-	            return function(tags) {
-	                return !regex.test(tags[tagKey]);
-	            };
-	        }
-	    };
-	};
 
-	var buildLineKeys = function() {
-	    return {
-	        highway: {
-	            rest_area: true,
-	            services: true
-	        },
-	        railway: {
-	            roundhouse: true,
-	            station: true,
-	            traverser: true,
-	            turntable: true,
-	            wash: true
-	        }
-	    };
-	};
+	    var addTags = _this.addTags;
 
-	var serviceMapRules = {
-	    init: function() {
-	        this._ruleChecks  = buildRuleChecks();
-	        this._validationRules = [];
-	        this._areaKeys = osmAreaKeys;
-	        this._lineKeys = buildLineKeys();
-	    },
+	    for (var _k in addTags) {
+	      if (!seen[_k] && entityTags[_k] === addTags[_k]) {
+	        score += _this.originalScore;
+	      }
+	    }
 
-	    // list of rules only relevant to tag checks...
-	    filterRuleChecks: function(selector) {
-	        var _ruleChecks = this._ruleChecks;
-	        return Object.keys(selector).reduce(function(rules, key) {
-	            if (['geometry', 'error', 'warning'].indexOf(key) === -1) {
-	                rules.push(_ruleChecks[key](selector[key]));
-	            }
-	            return rules;
-	        }, []);
-	    },
+	    return score;
+	  };
 
-	    // builds tagMap from mapcss-parse selector object...
-	    buildTagMap: function(selector) {
-	        var getRegexValues = function(regexes) {
-	            return regexes.map(function(regex) {
-	                return regex.replace(/\$|\^/g, '');
-	            });
-	        };
+	  _this.t = function (scope, options) {
+	    var textID = "presets.presets.".concat(presetID, ".").concat(scope);
+	    return _t(textID, options);
+	  };
 
-	        var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
-	            var values;
-	            var isRegex = /regex/gi.test(key);
-	            var isEqual = /equals/gi.test(key);
+	  _this.t.html = function (scope, options) {
+	    var textID = "presets.presets.".concat(presetID, ".").concat(scope);
+	    return _t.html(textID, options);
+	  };
 
-	            if (isRegex || isEqual) {
-	                Object.keys(selector[key]).forEach(function(selectorKey) {
-	                    values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
+	  _this.name = function () {
+	    return _this.t('name', {
+	      'default': _this.originalName
+	    });
+	  };
 
-	                    if (expectedTags.hasOwnProperty(selectorKey)) {
-	                        values = values.concat(expectedTags[selectorKey]);
-	                    }
+	  _this.nameLabel = function () {
+	    return _this.t.html('name', {
+	      'default': _this.originalName
+	    });
+	  };
 
-	                    expectedTags[selectorKey] = values;
-	                });
+	  _this.subtitle = function () {
+	    if (_this.suggestion) {
+	      var path = presetID.split('/');
+	      path.pop(); // remove brand name
 
-	            } else if (/(greater|less)Than(Equal)?|presence/g.test(key)) {
-	                var tagKey = /presence/.test(key) ? selector[key] : Object.keys(selector[key])[0];
+	      return _t('presets.presets.' + path.join('/') + '.name');
+	    }
 
-	                values = [selector[key][tagKey]];
+	    return null;
+	  };
 
-	                if (expectedTags.hasOwnProperty(tagKey)) {
-	                    values = values.concat(expectedTags[tagKey]);
-	                }
+	  _this.subtitleLabel = function () {
+	    if (_this.suggestion) {
+	      var path = presetID.split('/');
+	      path.pop(); // remove brand name
 
-	                expectedTags[tagKey] = values;
-	            }
+	      return _t.html('presets.presets.' + path.join('/') + '.name');
+	    }
 
-	            return expectedTags;
-	        }, {});
+	    return null;
+	  };
 
-	        return tagMap;
-	    },
+	  _this.terms = function () {
+	    return _this.t('terms', {
+	      'default': _this.originalTerms
+	    }).toLowerCase().trim().split(/\s*,+\s*/);
+	  };
 
-	    // inspired by osmWay#isArea()
-	    inferGeometry: function(tagMap) {
-	        var _lineKeys = this._lineKeys;
-	        var _areaKeys = this._areaKeys;
+	  _this.isFallback = function () {
+	    var tagCount = Object.keys(_this.tags).length;
+	    return tagCount === 0 || tagCount === 1 && _this.tags.hasOwnProperty('area');
+	  };
 
-	        var keyValueDoesNotImplyArea = function(key) {
-	            return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
-	        };
-	        var keyValueImpliesLine = function(key) {
-	            return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
-	        };
+	  _this.addable = function (val) {
+	    if (!arguments.length) return _addable;
+	    _addable = val;
+	    return _this;
+	  };
 
-	        if (tagMap.hasOwnProperty('area')) {
-	            if (tagMap.area.indexOf('yes') > -1) {
-	                return 'area';
-	            }
-	            if (tagMap.area.indexOf('no') > -1) {
-	                return 'line';
-	            }
-	        }
+	  _this.reference = function () {
+	    // Lookup documentation on Wikidata...
+	    var qid = _this.tags.wikidata || _this.tags['brand:wikidata'] || _this.tags['operator:wikidata'];
 
-	        for (var key in tagMap) {
-	            if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
-	                return 'area';
-	            }
-	            if (key in _lineKeys && keyValueImpliesLine(key)) {
-	                return 'area';
-	            }
-	        }
+	    if (qid) {
+	      return {
+	        qid: qid
+	      };
+	    } // Lookup documentation on OSM Wikibase...
 
-	        return 'line';
-	    },
 
-	    // adds from mapcss-parse selector check...
-	    addRule: function(selector) {
-	        var rule = {
-	            // checks relevant to mapcss-selector
-	            checks: this.filterRuleChecks(selector),
-	            // true if all conditions for a tag error are true..
-	            matches: function(entity) {
-	                return this.checks.every(function(check) {
-	                    return check(entity.tags);
-	                });
-	            },
-	            // borrowed from Way#isArea()
-	            inferredGeometry: this.inferGeometry(this.buildTagMap(selector), this._areaKeys),
-	            geometryMatches: function(entity, graph) {
-	                if (entity.type === 'node' || entity.type === 'relation') {
-	                    return selector.geometry === entity.type;
-	                } else if (entity.type === 'way') {
-	                    return this.inferredGeometry === entity.geometry(graph);
-	                }
-	            },
-	            // when geometries match and tag matches are present, return a warning...
-	            findIssues: function (entity, graph, issues) {
-	                if (this.geometryMatches(entity, graph) && this.matches(entity)) {
-	                    var severity = Object.keys(selector).indexOf('error') > -1
-	                            ? 'error'
-	                            : 'warning';
-	                    var message = selector[severity];
-	                    issues.push(new validationIssue({
-	                        type: 'maprules',
-	                        severity: severity,
-	                        message: function() {
-	                            return message;
-	                        },
-	                        entityIds: [entity.id]
-	                    }));
-	                }
-	            }
-	        };
-	        this._validationRules.push(rule);
-	    },
+	    var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
+	    var value = _this.originalReference.value || _this.tags[key];
 
-	    clearRules: function() { this._validationRules = []; },
+	    if (value === '*') {
+	      return {
+	        key: key
+	      };
+	    } else {
+	      return {
+	        key: key,
+	        value: value
+	      };
+	    }
+	  };
 
-	    // returns validationRules...
-	    validationRules: function() { return this._validationRules; },
+	  _this.unsetTags = function (tags, geometry, skipFieldDefaults) {
+	    tags = utilObjectOmit(tags, Object.keys(_this.removeTags));
 
-	    // returns ruleChecks
-	    ruleChecks: function() { return this._ruleChecks; }
-	};
+	    if (geometry && !skipFieldDefaults) {
+	      _this.fields().forEach(function (field) {
+	        if (field.matchGeometry(geometry) && field.key && field["default"] === tags[field.key]) {
+	          delete tags[field.key];
+	        }
+	      });
+	    }
 
-	var apibase$1 = 'https://nominatim.openstreetmap.org/';
-	var _inflight = {};
-	var _nominatimCache;
+	    delete tags.area;
+	    return tags;
+	  };
 
+	  _this.setTags = function (tags, geometry, skipFieldDefaults) {
+	    var addTags = _this.addTags;
+	    tags = Object.assign({}, tags); // shallow copy
 
-	var serviceNominatim = {
+	    for (var k in addTags) {
+	      if (addTags[k] === '*') {
+	        tags[k] = 'yes';
+	      } else {
+	        tags[k] = addTags[k];
+	      }
+	    } // Add area=yes if necessary.
+	    // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
+	    // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
+	    // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)
 
-	    init: function() {
-	        _inflight = {};
-	        _nominatimCache = new RBush();
-	    },
 
-	    reset: function() {
-	        Object.values(_inflight).forEach(function(controller) { controller.abort(); });
-	        _inflight = {};
-	        _nominatimCache = new RBush();
-	    },
+	    if (!addTags.hasOwnProperty('area')) {
+	      delete tags.area;
 
+	      if (geometry === 'area') {
+	        var needsAreaTag = true;
 
-	    countryCode: function (location, callback) {
-	        this.reverse(location, function(err, result) {
-	            if (err) {
-	                return callback(err);
-	            } else if (result.address) {
-	                return callback(null, result.address.country_code);
-	            } else {
-	                return callback('Unable to geocode', null);
+	        if (_this.geometry.indexOf('line') === -1) {
+	          for (var _k2 in addTags) {
+	            if (_k2 in osmAreaKeys) {
+	              needsAreaTag = false;
+	              break;
 	            }
-	        });
-	    },
-
+	          }
+	        }
 
-	    reverse: function (loc, callback) {
-	        var cached = _nominatimCache.search(
-	            { minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1] }
-	        );
+	        if (needsAreaTag) {
+	          tags.area = 'yes';
+	        }
+	      }
+	    }
 
-	        if (cached.length > 0) {
-	            if (callback) { callback(null, cached[0].data); }
-	            return;
+	    if (geometry && !skipFieldDefaults) {
+	      _this.fields().forEach(function (field) {
+	        if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field["default"]) {
+	          tags[field.key] = field["default"];
 	        }
+	      });
+	    }
 
-	        var params = { zoom: 13, format: 'json', addressdetails: 1, lat: loc[1], lon: loc[0] };
-	        var url = apibase$1 + 'reverse?' + utilQsString(params);
+	    return tags;
+	  }; // For a preset without fields, use the fields of the parent preset.
+	  // Replace {preset} placeholders with the fields of the specified presets.
 
-	        if (_inflight[url]) { return; }
-	        var controller = new AbortController();
-	        _inflight[url] = controller;
 
-	        d3_json(url, { signal: controller.signal })
-	            .then(function(result) {
-	                delete _inflight[url];
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                var extent = geoExtent(loc).padByMeters(200);
-	                _nominatimCache.insert(Object.assign(extent.bbox(), {data: result}));
-	                if (callback) { callback(null, result); }
-	            })
-	            .catch(function(err) {
-	                delete _inflight[url];
-	                if (err.name === 'AbortError') { return; }
-	                if (callback) { callback(err.message); }
-	            });
-	    },
+	  function resolve(which) {
+	    var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
+	    var resolved = [];
+	    fieldIDs.forEach(function (fieldID) {
+	      var match = fieldID.match(/\{(.*)\}/);
 
+	      if (match !== null) {
+	        // a presetID wrapped in braces {}
+	        resolved = resolved.concat(inheritFields(match[1], which));
+	      } else if (allFields[fieldID]) {
+	        // a normal fieldID
+	        resolved.push(allFields[fieldID]);
+	      } else {
+	        console.log("Cannot resolve \"".concat(fieldID, "\" found in ").concat(_this.id, ".").concat(which)); // eslint-disable-line no-console
+	      }
+	    }); // no fields resolved, so use the parent's if possible
 
-	    search: function (val, callback) {
-	        var searchVal = encodeURIComponent(val);
-	        var url = apibase$1 + 'search/' + searchVal + '?limit=10&format=json';
+	    if (!resolved.length) {
+	      var endIndex = _this.id.lastIndexOf('/');
 
-	        if (_inflight[url]) { return; }
-	        var controller = new AbortController();
-	        _inflight[url] = controller;
+	      var parentID = endIndex && _this.id.substring(0, endIndex);
 
-	        d3_json(url, { signal: controller.signal })
-	            .then(function(result) {
-	                delete _inflight[url];
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                if (callback) { callback(null, result); }
-	            })
-	            .catch(function(err) {
-	                delete _inflight[url];
-	                if (err.name === 'AbortError') { return; }
-	                if (callback) { callback(err.message); }
-	            });
+	      if (parentID) {
+	        resolved = inheritFields(parentID, which);
+	      }
 	    }
 
-	};
+	    return utilArrayUniq(resolved); // returns an array of fields to inherit from the given presetID, if found
 
-	var apibase$2 = 'https://openstreetcam.org';
-	var maxResults$1 = 1000;
-	var tileZoom$1 = 14;
-	var tiler$4 = utilTiler().zoomExtent([tileZoom$1, tileZoom$1]).skipNullIsland(true);
-	var dispatch$5 = dispatch('loadedImages');
-	var imgZoom = d3_zoom()
-	    .extent([[0, 0], [320, 240]])
-	    .translateExtent([[0, 0], [320, 240]])
-	    .scaleExtent([1, 15]);
-	var _oscCache;
-	var _oscSelectedImage;
+	    function inheritFields(presetID, which) {
+	      var parent = allPresets[presetID];
+	      if (!parent) return [];
 
+	      if (which === 'fields') {
+	        return parent.fields().filter(shouldInherit);
+	      } else if (which === 'moreFields') {
+	        return parent.moreFields();
+	      } else {
+	        return [];
+	      }
+	    } // Skip `fields` for the keys which define the preset.
+	    // These are usually `typeCombo` fields like `shop=*`
 
-	function abortRequest$4(controller) {
-	    controller.abort();
-	}
 
+	    function shouldInherit(f) {
+	      if (f.key && _this.tags[f.key] !== undefined && // inherit anyway if multiple values are allowed or just a checkbox
+	      f.type !== 'multiCombo' && f.type !== 'semiCombo' && f.type !== 'manyCombo' && f.type !== 'check') return false;
+	      return true;
+	    }
+	  }
 
-	function maxPageAtZoom$1(z) {
-	    if (z < 15)   { return 2; }
-	    if (z === 15) { return 5; }
-	    if (z === 16) { return 10; }
-	    if (z === 17) { return 20; }
-	    if (z === 18) { return 40; }
-	    if (z > 18)   { return 80; }
+	  return _this;
 	}
 
+	var _mainPresetIndex = presetIndex(); // singleton
+	// `presetIndex` wraps a `presetCollection`
+	// with methods for loading new data and returning defaults
+	//
 
-	function loadTiles$1(which, url, projection) {
-	    var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-	    var tiles = tiler$4.getTiles(projection);
-
-	    // abort inflight requests that are no longer needed
-	    var cache = _oscCache[which];
-	    Object.keys(cache.inflight).forEach(function(k) {
-	        var wanted = tiles.find(function(tile) { return k.indexOf(tile.id + ',') === 0; });
-	        if (!wanted) {
-	            abortRequest$4(cache.inflight[k]);
-	            delete cache.inflight[k];
-	        }
-	    });
+	function presetIndex() {
+	  var dispatch$1 = dispatch('favoritePreset', 'recentsChange');
+	  var MAXRECENTS = 30; // seed the preset lists with geometry fallbacks
 
-	    tiles.forEach(function(tile) {
-	        loadNextTilePage$1(which, currZoom, url, tile);
-	    });
-	}
+	  var POINT = presetPreset('point', {
+	    name: 'Point',
+	    tags: {},
+	    geometry: ['point', 'vertex'],
+	    matchScore: 0.1
+	  });
+	  var LINE = presetPreset('line', {
+	    name: 'Line',
+	    tags: {},
+	    geometry: ['line'],
+	    matchScore: 0.1
+	  });
+	  var AREA = presetPreset('area', {
+	    name: 'Area',
+	    tags: {
+	      area: 'yes'
+	    },
+	    geometry: ['area'],
+	    matchScore: 0.1
+	  });
+	  var RELATION = presetPreset('relation', {
+	    name: 'Relation',
+	    tags: {},
+	    geometry: ['relation'],
+	    matchScore: 0.1
+	  });
 
+	  var _this = presetCollection([POINT, LINE, AREA, RELATION]);
 
-	function loadNextTilePage$1(which, currZoom, url, tile) {
-	    var cache = _oscCache[which];
-	    var bbox = tile.extent.bbox();
-	    var maxPages = maxPageAtZoom$1(currZoom);
-	    var nextPage = cache.nextPage[tile.id] || 1;
-	    var params = utilQsString({
-	        ipp: maxResults$1,
-	        page: nextPage,
-	        // client_id: clientId,
-	        bbTopLeft: [bbox.maxY, bbox.minX].join(','),
-	        bbBottomRight: [bbox.minY, bbox.maxX].join(',')
-	    }, true);
-
-	    if (nextPage > maxPages) { return; }
-
-	    var id = tile.id + ',' + String(nextPage);
-	    if (cache.loaded[id] || cache.inflight[id]) { return; }
+	  var _presets = {
+	    point: POINT,
+	    line: LINE,
+	    area: AREA,
+	    relation: RELATION
+	  };
+	  var _defaults = {
+	    point: presetCollection([POINT]),
+	    vertex: presetCollection([POINT]),
+	    line: presetCollection([LINE]),
+	    area: presetCollection([AREA]),
+	    relation: presetCollection([RELATION])
+	  };
+	  var _fields = {};
+	  var _categories = {};
+	  var _universal = [];
+	  var _addablePresetIDs = null; // Set of preset IDs that the user can add
 
-	    var controller = new AbortController();
-	    cache.inflight[id] = controller;
+	  var _recents;
 
-	    var options = {
-	        method: 'POST',
-	        signal: controller.signal,
-	        body: params,
-	        headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
-	    };
+	  var _favorites; // Index of presets by (geometry, tag key).
 
-	    d3_json(url, options)
-	        .then(function(data) {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	            if (!data || !data.currentPageItems || !data.currentPageItems.length) {
-	                throw new Error('No Data');
-	            }
 
-	            var features = data.currentPageItems.map(function(item) {
-	                var loc = [+item.lng, +item.lat];
-	                var d;
-
-	                if (which === 'images') {
-	                    d = {
-	                        loc: loc,
-	                        key: item.id,
-	                        ca: +item.heading,
-	                        captured_at: (item.shot_date || item.date_added),
-	                        captured_by: item.username,
-	                        imagePath: item.lth_name,
-	                        sequence_id: item.sequence_id,
-	                        sequence_index: +item.sequence_index
-	                    };
-
-	                    // cache sequence info
-	                    var seq = _oscCache.sequences[d.sequence_id];
-	                    if (!seq) {
-	                        seq = { rotation: 0, images: [] };
-	                        _oscCache.sequences[d.sequence_id] = seq;
-	                    }
-	                    seq.images[d.sequence_index] = d;
-	                }
+	  var _geometryIndex = {
+	    point: {},
+	    vertex: {},
+	    line: {},
+	    area: {},
+	    relation: {}
+	  };
 
-	                return {
-	                    minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-	                };
-	            });
+	  var _loadPromise;
 
-	            cache.rtree.load(features);
+	  _this.ensureLoaded = function () {
+	    if (_loadPromise) return _loadPromise;
+	    return _loadPromise = Promise.all([_mainFileFetcher.get('preset_categories'), _mainFileFetcher.get('preset_defaults'), _mainFileFetcher.get('preset_presets'), _mainFileFetcher.get('preset_fields')]).then(function (vals) {
+	      _this.merge({
+	        categories: vals[0],
+	        defaults: vals[1],
+	        presets: vals[2],
+	        fields: vals[3]
+	      });
 
-	            if (data.currentPageItems.length === maxResults$1) {  // more pages to load
-	                cache.nextPage[tile.id] = nextPage + 1;
-	                loadNextTilePage$1(which, currZoom, url, tile);
-	            } else {
-	                cache.nextPage[tile.id] = Infinity;     // no more pages to load
-	            }
+	      osmSetAreaKeys(_this.areaKeys());
+	      osmSetPointTags(_this.pointTags());
+	      osmSetVertexTags(_this.vertexTags());
+	    });
+	  };
 
-	            if (which === 'images') {
-	                dispatch$5.call('loadedImages');
-	            }
-	        })
-	        .catch(function() {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	        });
-	}
+	  _this.merge = function (d) {
+	    // Merge Fields
+	    if (d.fields) {
+	      Object.keys(d.fields).forEach(function (fieldID) {
+	        var f = d.fields[fieldID];
 
+	        if (f) {
+	          // add or replace
+	          _fields[fieldID] = presetField(fieldID, f);
+	        } else {
+	          // remove
+	          delete _fields[fieldID];
+	        }
+	      });
+	    } // Merge Presets
 
-	// partition viewport into higher zoom tiles
-	function partitionViewport$1(projection) {
-	    var z = geoScaleToZoom(projection.scale());
-	    var z2 = (Math.ceil(z * 2) / 2) + 2.5;   // round to next 0.5 and add 2.5
-	    var tiler = utilTiler().zoomExtent([z2, z2]);
 
-	    return tiler.getTiles(projection)
-	        .map(function(tile) { return tile.extent; });
-	}
+	    if (d.presets) {
+	      Object.keys(d.presets).forEach(function (presetID) {
+	        var p = d.presets[presetID];
 
+	        if (p) {
+	          // add or replace
+	          var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
 
-	// no more than `limit` results per partition.
-	function searchLimited$1(limit, projection, rtree) {
-	    limit = limit || 5;
+	          _presets[presetID] = presetPreset(presetID, p, isAddable, _fields, _presets);
+	        } else {
+	          // remove (but not if it's a fallback)
+	          var existing = _presets[presetID];
 
-	    return partitionViewport$1(projection)
-	        .reduce(function(result, extent) {
-	            var found = rtree.search(extent.bbox())
-	                .slice(0, limit)
-	                .map(function(d) { return d.data; });
+	          if (existing && !existing.isFallback()) {
+	            delete _presets[presetID];
+	          }
+	        }
+	      });
+	    } // Need to rebuild _this.collection before loading categories
 
-	            return (found.length ? result.concat(found) : result);
-	        }, []);
-	}
 
+	    _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Categories
 
-	var serviceOpenstreetcam = {
+	    if (d.categories) {
+	      Object.keys(d.categories).forEach(function (categoryID) {
+	        var c = d.categories[categoryID];
 
-	    init: function() {
-	        if (!_oscCache) {
-	            this.reset();
+	        if (c) {
+	          // add or replace
+	          _categories[categoryID] = presetCategory(categoryID, c, _this);
+	        } else {
+	          // remove
+	          delete _categories[categoryID];
 	        }
+	      });
+	    } // Rebuild _this.collection after loading categories
 
-	        this.event = utilRebind(this, dispatch$5, 'on');
-	    },
 
-	    reset: function() {
-	        if (_oscCache) {
-	            Object.values(_oscCache.images.inflight).forEach(abortRequest$4);
-	        }
+	    _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Defaults
 
-	        _oscCache = {
-	            images: { inflight: {}, loaded: {}, nextPage: {}, rtree: new RBush() },
-	            sequences: {}
-	        };
+	    if (d.defaults) {
+	      Object.keys(d.defaults).forEach(function (geometry) {
+	        var def = d.defaults[geometry];
 
-	        _oscSelectedImage = null;
-	    },
+	        if (Array.isArray(def)) {
+	          // add or replace
+	          _defaults[geometry] = presetCollection(def.map(function (id) {
+	            return _presets[id] || _categories[id];
+	          }).filter(Boolean));
+	        } else {
+	          // remove
+	          delete _defaults[geometry];
+	        }
+	      });
+	    } // Rebuild universal fields array
 
 
-	    images: function(projection) {
-	        var limit = 5;
-	        return searchLimited$1(limit, projection, _oscCache.images.rtree);
-	    },
+	    _universal = Object.values(_fields).filter(function (field) {
+	      return field.universal;
+	    }); // Reset all the preset fields - they'll need to be resolved again
 
+	    Object.values(_presets).forEach(function (preset) {
+	      return preset.resetFields();
+	    }); // Rebuild geometry index
 
-	    sequences: function(projection) {
-	        var viewport = projection.clipExtent();
-	        var min = [viewport[0][0], viewport[1][1]];
-	        var max = [viewport[1][0], viewport[0][1]];
-	        var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-	        var sequenceKeys = {};
-
-	        // all sequences for images in viewport
-	        _oscCache.images.rtree.search(bbox)
-	            .forEach(function(d) { sequenceKeys[d.data.sequence_id] = true; });
-
-	        // make linestrings from those sequences
-	        var lineStrings = [];
-	        Object.keys(sequenceKeys)
-	            .forEach(function(sequenceKey) {
-	                var seq = _oscCache.sequences[sequenceKey];
-	                var images = seq && seq.images;
-	                if (images) {
-	                    lineStrings.push({
-	                        type: 'LineString',
-	                        coordinates: images.map(function (d) { return d.loc; }).filter(Boolean),
-	                        properties: { key: sequenceKey }
-	                    });
-	                }
-	            });
-	        return lineStrings;
-	    },
+	    _geometryIndex = {
+	      point: {},
+	      vertex: {},
+	      line: {},
+	      area: {},
+	      relation: {}
+	    };
 
+	    _this.collection.forEach(function (preset) {
+	      (preset.geometry || []).forEach(function (geometry) {
+	        var g = _geometryIndex[geometry];
 
-	    loadImages: function(projection) {
-	        var url = apibase$2 + '/1.0/list/nearby-photos/';
-	        loadTiles$1('images', url, projection);
-	    },
+	        for (var key in preset.tags) {
+	          (g[key] = g[key] || []).push(preset);
+	        }
+	      });
+	    });
 
+	    return _this;
+	  };
 
-	    loadViewer: function(context) {
-	        var that = this;
+	  _this.match = function (entity, resolver) {
+	    return resolver["transient"](entity, 'presetMatch', function () {
+	      var geometry = entity.geometry(resolver); // Treat entities on addr:interpolation lines as points, not vertices - #3241
 
-	        // add osc-wrapper
-	        var wrap = context.container().select('.photoviewer').selectAll('.osc-wrapper')
-	            .data([0]);
+	      if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
+	        geometry = 'point';
+	      }
 
-	        var wrapEnter = wrap.enter()
-	            .append('div')
-	            .attr('class', 'photo-wrapper osc-wrapper')
-	            .classed('hide', true)
-	            .call(imgZoom.on('zoom', zoomPan))
-	            .on('dblclick.zoom', null);
+	      return _this.matchTags(entity.tags, geometry);
+	    });
+	  };
 
-	        wrapEnter
-	            .append('div')
-	            .attr('class', 'photo-attribution fillD');
+	  _this.matchTags = function (tags, geometry) {
+	    var geometryMatches = _geometryIndex[geometry];
+	    var address;
+	    var best = -1;
+	    var match;
 
-	        var controlsEnter = wrapEnter
-	            .append('div')
-	            .attr('class', 'photo-controls-wrap')
-	            .append('div')
-	            .attr('class', 'photo-controls');
+	    for (var k in tags) {
+	      // If any part of an address is present, allow fallback to "Address" preset - #4353
+	      if (/^addr:/.test(k) && geometryMatches['addr:*']) {
+	        address = geometryMatches['addr:*'][0];
+	      }
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.back', step(-1))
-	            .text('◄');
+	      var keyMatches = geometryMatches[k];
+	      if (!keyMatches) continue;
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.rotate-ccw', rotate(-90))
-	            .text('⤿');
+	      for (var i = 0; i < keyMatches.length; i++) {
+	        var score = keyMatches[i].matchScore(tags);
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.rotate-cw', rotate(90))
-	            .text('⤾');
+	        if (score > best) {
+	          best = score;
+	          match = keyMatches[i];
+	        }
+	      }
+	    }
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.forward', step(1))
-	            .text('►');
+	    if (address && (!match || match.isFallback())) {
+	      match = address;
+	    }
 
-	        wrapEnter
-	            .append('div')
-	            .attr('class', 'osc-image-wrap');
+	    return match || _this.fallback(geometry);
+	  };
 
+	  _this.allowsVertex = function (entity, resolver) {
+	    if (entity.type !== 'node') return false;
+	    if (Object.keys(entity.tags).length === 0) return true;
+	    return resolver["transient"](entity, 'vertexMatch', function () {
+	      // address lines allow vertices to act as standalone points
+	      if (entity.isOnAddressLine(resolver)) return true;
+	      var geometries = osmNodeGeometriesForTags(entity.tags);
+	      if (geometries.vertex) return true;
+	      if (geometries.point) return false; // allow vertices for unspecified points
 
-	        // Register viewer resize handler
-	        context.ui().photoviewer.on('resize.openstreetcam', function(dimensions) {
-	            imgZoom = d3_zoom()
-	                .extent([[0, 0], dimensions])
-	                .translateExtent([[0, 0], dimensions])
-	                .scaleExtent([1, 15])
-	                .on('zoom', zoomPan);
-	        });
+	      return true;
+	    });
+	  }; // Because of the open nature of tagging, iD will never have a complete
+	  // list of tags used in OSM, so we want it to have logic like "assume
+	  // that a closed way with an amenity tag is an area, unless the amenity
+	  // is one of these specific types". This function computes a structure
+	  // that allows testing of such conditions, based on the presets designated
+	  // as as supporting (or not supporting) the area geometry.
+	  //
+	  // The returned object L is a keeplist/discardlist of tags. A closed way
+	  // with a tag (k, v) is considered to be an area if `k in L && !(v in L[k])`
+	  // (see `Way#isArea()`). In other words, the keys of L form the keeplist,
+	  // and the subkeys form the discardlist.
 
 
-	        function zoomPan() {
-	            var t = event.transform;
-	            context.container().select('.photoviewer .osc-image-wrap')
-	                .call(utilSetTransform, t.x, t.y, t.k);
-	        }
+	  _this.areaKeys = function () {
+	    // The ignore list is for keys that imply lines. (We always add `area=yes` for exceptions)
+	    var ignore = ['barrier', 'highway', 'footway', 'railway', 'junction', 'type'];
+	    var areaKeys = {}; // ignore name-suggestion-index and deprecated presets
 
+	    var presets = _this.collection.filter(function (p) {
+	      return !p.suggestion && !p.replacement;
+	    }); // keeplist
 
-	        function rotate(deg) {
-	            return function() {
-	                if (!_oscSelectedImage) { return; }
-	                var sequenceKey = _oscSelectedImage.sequence_id;
-	                var sequence = _oscCache.sequences[sequenceKey];
-	                if (!sequence) { return; }
 
-	                var r = sequence.rotation || 0;
-	                r += deg;
+	    presets.forEach(function (p) {
+	      var keys = p.tags && Object.keys(p.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	                if (r > 180) { r -= 360; }
-	                if (r < -180) { r += 360; }
-	                sequence.rotation = r;
+	      if (!key) return;
+	      if (ignore.indexOf(key) !== -1) return;
 
-	                var wrap = context.container().select('.photoviewer .osc-wrapper');
+	      if (p.geometry.indexOf('area') !== -1) {
+	        // probably an area..
+	        areaKeys[key] = areaKeys[key] || {};
+	      }
+	    }); // discardlist
 
-	                wrap
-	                    .transition()
-	                    .duration(100)
-	                    .call(imgZoom.transform, identity$2);
+	    presets.forEach(function (p) {
+	      var key;
 
-	                wrap.selectAll('.osc-image')
-	                    .transition()
-	                    .duration(100)
-	                    .style('transform', 'rotate(' + r + 'deg)');
-	            };
+	      for (key in p.addTags) {
+	        // examine all addTags to get a better sense of what can be tagged on lines - #6800
+	        var value = p.addTags[key];
+
+	        if (key in areaKeys && // probably an area...
+	        p.geometry.indexOf('line') !== -1 && // but sometimes a line
+	        value !== '*') {
+	          areaKeys[key][value] = true;
 	        }
+	      }
+	    });
+	    return areaKeys;
+	  };
+
+	  _this.pointTags = function () {
+	    return _this.collection.reduce(function (pointTags, d) {
+	      // ignore name-suggestion-index, deprecated, and generic presets
+	      if (d.suggestion || d.replacement || d.searchable === false) return pointTags; // only care about the primary tag
 
-	        function step(stepBy) {
-	            return function() {
-	                if (!_oscSelectedImage) { return; }
-	                var sequenceKey = _oscSelectedImage.sequence_id;
-	                var sequence = _oscCache.sequences[sequenceKey];
-	                if (!sequence) { return; }
+	      var keys = d.tags && Object.keys(d.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	                var nextIndex = _oscSelectedImage.sequence_index + stepBy;
-	                var nextImage = sequence.images[nextIndex];
-	                if (!nextImage) { return; }
+	      if (!key) return pointTags; // if this can be a point
 
-	                context.map().centerEase(nextImage.loc);
+	      if (d.geometry.indexOf('point') !== -1) {
+	        pointTags[key] = pointTags[key] || {};
+	        pointTags[key][d.tags[key]] = true;
+	      }
 
-	                that
-	                    .selectImage(context, nextImage)
-	                    .updateViewer(context, nextImage);
-	            };
-	        }
-	    },
+	      return pointTags;
+	    }, {});
+	  };
 
+	  _this.vertexTags = function () {
+	    return _this.collection.reduce(function (vertexTags, d) {
+	      // ignore name-suggestion-index, deprecated, and generic presets
+	      if (d.suggestion || d.replacement || d.searchable === false) return vertexTags; // only care about the primary tag
 
-	    showViewer: function(context) {
-	        var viewer = context.container().select('.photoviewer')
-	            .classed('hide', false);
+	      var keys = d.tags && Object.keys(d.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	        var isHidden = viewer.selectAll('.photo-wrapper.osc-wrapper.hide').size();
+	      if (!key) return vertexTags; // if this can be a vertex
 
-	        if (isHidden) {
-	            viewer
-	                .selectAll('.photo-wrapper:not(.osc-wrapper)')
-	                .classed('hide', true);
+	      if (d.geometry.indexOf('vertex') !== -1) {
+	        vertexTags[key] = vertexTags[key] || {};
+	        vertexTags[key][d.tags[key]] = true;
+	      }
 
-	            viewer
-	                .selectAll('.photo-wrapper.osc-wrapper')
-	                .classed('hide', false);
-	        }
+	      return vertexTags;
+	    }, {});
+	  };
 
-	        return this;
-	    },
+	  _this.field = function (id) {
+	    return _fields[id];
+	  };
 
+	  _this.universal = function () {
+	    return _universal;
+	  };
 
-	    hideViewer: function(context) {
-	        _oscSelectedImage = null;
+	  _this.defaults = function (geometry, n, startWithRecents) {
+	    var recents = [];
 
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(null); }
+	    if (startWithRecents) {
+	      recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
+	    }
 
-	        viewer
-	            .classed('hide', true)
-	            .selectAll('.photo-wrapper')
-	            .classed('hide', true);
+	    var defaults;
 
-	        context.container().selectAll('.viewfield-group, .sequence, .icon-sign')
-	            .classed('currentView', false);
+	    if (_addablePresetIDs) {
+	      defaults = Array.from(_addablePresetIDs).map(function (id) {
+	        var preset = _this.item(id);
 
-	        return this.setStyles(context, null, true);
-	    },
+	        if (preset && preset.matchGeometry(geometry)) return preset;
+	        return null;
+	      }).filter(Boolean);
+	    } else {
+	      defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
+	    }
 
+	    return presetCollection(utilArrayUniq(recents.concat(defaults)).slice(0, n - 1));
+	  }; // pass a Set of addable preset ids
 
-	    updateViewer: function(context, d) {
-	        var wrap = context.container().select('.photoviewer .osc-wrapper');
-	        var imageWrap = wrap.selectAll('.osc-image-wrap');
-	        var attribution = wrap.selectAll('.photo-attribution').html('');
-
-	        wrap
-	            .transition()
-	            .duration(100)
-	            .call(imgZoom.transform, identity$2);
-
-	        imageWrap
-	            .selectAll('.osc-image')
-	            .remove();
-
-	        if (d) {
-	            var sequence = _oscCache.sequences[d.sequence_id];
-	            var r = (sequence && sequence.rotation) || 0;
-
-	            imageWrap
-	                .append('img')
-	                .attr('class', 'osc-image')
-	                .attr('src', apibase$2 + '/' + d.imagePath)
-	                .style('transform', 'rotate(' + r + 'deg)');
-
-	            if (d.captured_by) {
-	                attribution
-	                    .append('a')
-	                    .attr('class', 'captured_by')
-	                    .attr('target', '_blank')
-	                    .attr('href', 'https://openstreetcam.org/user/' + encodeURIComponent(d.captured_by))
-	                    .text('@' + d.captured_by);
-
-	                attribution
-	                    .append('span')
-	                    .text('|');
-	            }
 
-	            if (d.captured_at) {
-	                attribution
-	                    .append('span')
-	                    .attr('class', 'captured_at')
-	                    .text(localeDateString(d.captured_at));
+	  _this.addablePresetIDs = function (val) {
+	    if (!arguments.length) return _addablePresetIDs; // accept and convert arrays
 
-	                attribution
-	                    .append('span')
-	                    .text('|');
-	            }
+	    if (Array.isArray(val)) val = new Set(val);
+	    _addablePresetIDs = val;
 
-	            attribution
-	                .append('a')
-	                .attr('class', 'image-link')
-	                .attr('target', '_blank')
-	                .attr('href', 'https://openstreetcam.org/details/' + d.sequence_id + '/' + d.sequence_index)
-	                .text('openstreetcam.org');
-	        }
+	    if (_addablePresetIDs) {
+	      // reset all presets
+	      _this.collection.forEach(function (p) {
+	        // categories aren't addable
+	        if (p.addable) p.addable(_addablePresetIDs.has(p.id));
+	      });
+	    } else {
+	      _this.collection.forEach(function (p) {
+	        if (p.addable) p.addable(true);
+	      });
+	    }
 
-	        return this;
+	    return _this;
+	  };
 
+	  _this.recent = function () {
+	    return presetCollection(utilArrayUniq(_this.getRecents().map(function (d) {
+	      return d.preset;
+	    })));
+	  };
 
-	        function localeDateString(s) {
-	            if (!s) { return null; }
-	            var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	            var d = new Date(s);
-	            if (isNaN(d.getTime())) { return null; }
-	            return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-	        }
-	    },
+	  function RibbonItem(preset, source) {
+	    var item = {};
+	    item.preset = preset;
+	    item.source = source;
 
+	    item.isFavorite = function () {
+	      return item.source === 'favorite';
+	    };
 
-	    selectImage: function(context, d) {
-	        _oscSelectedImage = d;
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(d); }
+	    item.isRecent = function () {
+	      return item.source === 'recent';
+	    };
 
-	        this.setStyles(context, null, true);
+	    item.matches = function (preset) {
+	      return item.preset.id === preset.id;
+	    };
 
-	        context.container().selectAll('.icon-sign')
-	            .classed('currentView', false);
+	    item.minified = function () {
+	      return {
+	        pID: item.preset.id
+	      };
+	    };
 
-	        return this;
-	    },
+	    return item;
+	  }
 
+	  function ribbonItemForMinified(d, source) {
+	    if (d && d.pID) {
+	      var preset = _this.item(d.pID);
 
-	    getSelectedImage: function() {
-	        return _oscSelectedImage;
-	    },
+	      if (!preset) return null;
+	      return RibbonItem(preset, source);
+	    }
 
+	    return null;
+	  }
 
-	    getSequenceKeyForImage: function(d) {
-	        return d && d.sequence_id;
-	    },
+	  _this.getGenericRibbonItems = function () {
+	    return ['point', 'line', 'area'].map(function (id) {
+	      return RibbonItem(_this.item(id), 'generic');
+	    });
+	  };
 
+	  _this.getAddable = function () {
+	    if (!_addablePresetIDs) return [];
+	    return _addablePresetIDs.map(function (id) {
+	      var preset = _this.item(id);
 
-	    // Updates the currently highlighted sequence and selected bubble.
-	    // Reset is only necessary when interacting with the viewport because
-	    // this implicitly changes the currently selected bubble/sequence
-	    setStyles: function(context, hovered, reset) {
-	        if (reset) {  // reset all layers
-	            context.container().selectAll('.viewfield-group')
-	                .classed('highlighted', false)
-	                .classed('hovered', false)
-	                .classed('currentView', false);
+	      if (preset) return RibbonItem(preset, 'addable');
+	      return null;
+	    }).filter(Boolean);
+	  };
 
-	            context.container().selectAll('.sequence')
-	                .classed('highlighted', false)
-	                .classed('currentView', false);
-	        }
+	  function setRecents(items) {
+	    _recents = items;
+	    var minifiedItems = items.map(function (d) {
+	      return d.minified();
+	    });
+	    corePreferences('preset_recents', JSON.stringify(minifiedItems));
+	    dispatch$1.call('recentsChange');
+	  }
 
-	        var hoveredImageKey = hovered && hovered.key;
-	        var hoveredSequenceKey = this.getSequenceKeyForImage(hovered);
-	        var hoveredSequence = hoveredSequenceKey && _oscCache.sequences[hoveredSequenceKey];
-	        var hoveredImageKeys = (hoveredSequence && hoveredSequence.images.map(function (d) { return d.key; })) || [];
+	  _this.getRecents = function () {
+	    if (!_recents) {
+	      // fetch from local storage
+	      _recents = (JSON.parse(corePreferences('preset_recents')) || []).reduce(function (acc, d) {
+	        var item = ribbonItemForMinified(d, 'recent');
+	        if (item && item.preset.addable()) acc.push(item);
+	        return acc;
+	      }, []);
+	    }
 
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
-	        var selectedImageKey = selected && selected.key;
-	        var selectedSequenceKey = this.getSequenceKeyForImage(selected);
-	        var selectedSequence = selectedSequenceKey && _oscCache.sequences[selectedSequenceKey];
-	        var selectedImageKeys = (selectedSequence && selectedSequence.images.map(function (d) { return d.key; })) || [];
-
-	        // highlight sibling viewfields on either the selected or the hovered sequences
-	        var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
-
-	        context.container().selectAll('.layer-openstreetcam .viewfield-group')
-	            .classed('highlighted', function(d) { return highlightedImageKeys.indexOf(d.key) !== -1; })
-	            .classed('hovered', function(d) { return d.key === hoveredImageKey; })
-	            .classed('currentView', function(d) { return d.key === selectedImageKey; });
-
-	        context.container().selectAll('.layer-openstreetcam .sequence')
-	            .classed('highlighted', function(d) { return d.properties.key === hoveredSequenceKey; })
-	            .classed('currentView', function(d) { return d.properties.key === selectedSequenceKey; });
-
-	        // update viewfields if needed
-	        context.container().selectAll('.viewfield-group .viewfield')
-	            .attr('d', viewfieldPath);
-
-	        function viewfieldPath() {
-	            var d = this.parentNode.__data__;
-	            if (d.pano && d.key !== selectedImageKey) {
-	                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	            } else {
-	                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-	            }
-	        }
+	    return _recents;
+	  };
 
-	        return this;
-	    },
+	  _this.addRecent = function (preset, besidePreset, after) {
+	    var recents = _this.getRecents();
 
+	    var beforeItem = _this.recentMatching(besidePreset);
 
-	    cache: function() {
-	        return _oscCache;
-	    }
+	    var toIndex = recents.indexOf(beforeItem);
+	    if (after) toIndex += 1;
+	    var newItem = RibbonItem(preset, 'recent');
+	    recents.splice(toIndex, 0, newItem);
+	    setRecents(recents);
+	  };
 
-	};
+	  _this.removeRecent = function (preset) {
+	    var item = _this.recentMatching(preset);
 
-	/**
-	 * Checks if `value` is the
-	 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
-	 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 0.1.0
-	 * @category Lang
-	 * @param {*} value The value to check.
-	 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
-	 * @example
-	 *
-	 * _.isObject({});
-	 * // => true
-	 *
-	 * _.isObject([1, 2, 3]);
-	 * // => true
-	 *
-	 * _.isObject(_.noop);
-	 * // => true
-	 *
-	 * _.isObject(null);
-	 * // => false
-	 */
-	function isObject$1(value) {
-	  var type = typeof value;
-	  return value != null && (type == 'object' || type == 'function');
-	}
+	    if (item) {
+	      var items = _this.getRecents();
+
+	      items.splice(items.indexOf(item), 1);
+	      setRecents(items);
+	    }
+	  };
 
-	/** Detect free variable `global` from Node.js. */
-	var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+	  _this.recentMatching = function (preset) {
+	    var items = _this.getRecents();
 
-	/** Detect free variable `self`. */
-	var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+	    for (var i in items) {
+	      if (items[i].matches(preset)) {
+	        return items[i];
+	      }
+	    }
 
-	/** Used as a reference to the global object. */
-	var root$2 = freeGlobal || freeSelf || Function('return this')();
+	    return null;
+	  };
 
-	/**
-	 * Gets the timestamp of the number of milliseconds that have elapsed since
-	 * the Unix epoch (1 January 1970 00:00:00 UTC).
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 2.4.0
-	 * @category Date
-	 * @returns {number} Returns the timestamp.
-	 * @example
-	 *
-	 * _.defer(function(stamp) {
-	 *   console.log(_.now() - stamp);
-	 * }, _.now());
-	 * // => Logs the number of milliseconds it took for the deferred invocation.
-	 */
-	var now$1 = function() {
-	  return root$2.Date.now();
-	};
+	  _this.moveItem = function (items, fromIndex, toIndex) {
+	    if (fromIndex === toIndex || fromIndex < 0 || toIndex < 0 || fromIndex >= items.length || toIndex >= items.length) return null;
+	    items.splice(toIndex, 0, items.splice(fromIndex, 1)[0]);
+	    return items;
+	  };
 
-	/** Built-in value references. */
-	var Symbol$1 = root$2.Symbol;
+	  _this.moveRecent = function (item, beforeItem) {
+	    var recents = _this.getRecents();
 
-	/** Used for built-in method references. */
-	var objectProto = Object.prototype;
+	    var fromIndex = recents.indexOf(item);
+	    var toIndex = recents.indexOf(beforeItem);
 
-	/** Used to check objects for own properties. */
-	var hasOwnProperty$2 = objectProto.hasOwnProperty;
+	    var items = _this.moveItem(recents, fromIndex, toIndex);
 
-	/**
-	 * Used to resolve the
-	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-	 * of values.
-	 */
-	var nativeObjectToString = objectProto.toString;
+	    if (items) setRecents(items);
+	  };
 
-	/** Built-in value references. */
-	var symToStringTag = Symbol$1 ? Symbol$1.toStringTag : undefined;
+	  _this.setMostRecent = function (preset) {
+	    if (preset.searchable === false) return;
 
-	/**
-	 * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
-	 *
-	 * @private
-	 * @param {*} value The value to query.
-	 * @returns {string} Returns the raw `toStringTag`.
-	 */
-	function getRawTag(value) {
-	  var isOwn = hasOwnProperty$2.call(value, symToStringTag),
-	      tag = value[symToStringTag];
+	    var items = _this.getRecents();
 
-	  try {
-	    value[symToStringTag] = undefined;
-	    var unmasked = true;
-	  } catch (e) {}
+	    var item = _this.recentMatching(preset);
 
-	  var result = nativeObjectToString.call(value);
-	  if (unmasked) {
-	    if (isOwn) {
-	      value[symToStringTag] = tag;
+	    if (item) {
+	      items.splice(items.indexOf(item), 1);
 	    } else {
-	      delete value[symToStringTag];
-	    }
-	  }
-	  return result;
-	}
+	      item = RibbonItem(preset, 'recent');
+	    } // remove the last recent (first in, first out)
 
-	/** Used for built-in method references. */
-	var objectProto$1 = Object.prototype;
 
-	/**
-	 * Used to resolve the
-	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-	 * of values.
-	 */
-	var nativeObjectToString$1 = objectProto$1.toString;
+	    while (items.length >= MAXRECENTS) {
+	      items.pop();
+	    } // prepend array
 
-	/**
-	 * Converts `value` to a string using `Object.prototype.toString`.
-	 *
-	 * @private
-	 * @param {*} value The value to convert.
-	 * @returns {string} Returns the converted string.
-	 */
-	function objectToString$2(value) {
-	  return nativeObjectToString$1.call(value);
-	}
 
-	/** `Object#toString` result references. */
-	var nullTag = '[object Null]',
-	    undefinedTag = '[object Undefined]';
+	    items.unshift(item);
+	    setRecents(items);
+	  };
 
-	/** Built-in value references. */
-	var symToStringTag$1 = Symbol$1 ? Symbol$1.toStringTag : undefined;
+	  function setFavorites(items) {
+	    _favorites = items;
+	    var minifiedItems = items.map(function (d) {
+	      return d.minified();
+	    });
+	    corePreferences('preset_favorites', JSON.stringify(minifiedItems)); // call update
 
-	/**
-	 * The base implementation of `getTag` without fallbacks for buggy environments.
-	 *
-	 * @private
-	 * @param {*} value The value to query.
-	 * @returns {string} Returns the `toStringTag`.
-	 */
-	function baseGetTag(value) {
-	  if (value == null) {
-	    return value === undefined ? undefinedTag : nullTag;
+	    dispatch$1.call('favoritePreset');
 	  }
-	  return (symToStringTag$1 && symToStringTag$1 in Object(value))
-	    ? getRawTag(value)
-	    : objectToString$2(value);
-	}
 
-	/**
-	 * Checks if `value` is object-like. A value is object-like if it's not `null`
-	 * and has a `typeof` result of "object".
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 4.0.0
-	 * @category Lang
-	 * @param {*} value The value to check.
-	 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
-	 * @example
-	 *
-	 * _.isObjectLike({});
-	 * // => true
-	 *
-	 * _.isObjectLike([1, 2, 3]);
-	 * // => true
-	 *
-	 * _.isObjectLike(_.noop);
-	 * // => false
-	 *
-	 * _.isObjectLike(null);
-	 * // => false
-	 */
-	function isObjectLike(value) {
-	  return value != null && typeof value == 'object';
-	}
+	  _this.addFavorite = function (preset, besidePreset, after) {
+	    var favorites = _this.getFavorites();
 
-	/** `Object#toString` result references. */
-	var symbolTag = '[object Symbol]';
+	    var beforeItem = _this.favoriteMatching(besidePreset);
 
-	/**
-	 * Checks if `value` is classified as a `Symbol` primitive or object.
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 4.0.0
-	 * @category Lang
-	 * @param {*} value The value to check.
-	 * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
-	 * @example
-	 *
-	 * _.isSymbol(Symbol.iterator);
-	 * // => true
-	 *
-	 * _.isSymbol('abc');
-	 * // => false
-	 */
-	function isSymbol$4(value) {
-	  return typeof value == 'symbol' ||
-	    (isObjectLike(value) && baseGetTag(value) == symbolTag);
-	}
+	    var toIndex = favorites.indexOf(beforeItem);
+	    if (after) toIndex += 1;
+	    var newItem = RibbonItem(preset, 'favorite');
+	    favorites.splice(toIndex, 0, newItem);
+	    setFavorites(favorites);
+	  };
 
-	/** Used as references for various `Number` constants. */
-	var NAN = 0 / 0;
+	  _this.toggleFavorite = function (preset) {
+	    var favs = _this.getFavorites();
 
-	/** Used to match leading and trailing whitespace. */
-	var reTrim = /^\s+|\s+$/g;
+	    var favorite = _this.favoriteMatching(preset);
 
-	/** Used to detect bad signed hexadecimal string values. */
-	var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+	    if (favorite) {
+	      favs.splice(favs.indexOf(favorite), 1);
+	    } else {
+	      // only allow 10 favorites
+	      if (favs.length === 10) {
+	        // remove the last favorite (last in, first out)
+	        favs.pop();
+	      } // append array
 
-	/** Used to detect binary string values. */
-	var reIsBinary = /^0b[01]+$/i;
 
-	/** Used to detect octal string values. */
-	var reIsOctal = /^0o[0-7]+$/i;
+	      favs.push(RibbonItem(preset, 'favorite'));
+	    }
 
-	/** Built-in method references without a dependency on `root`. */
-	var freeParseInt = parseInt;
+	    setFavorites(favs);
+	  };
 
-	/**
-	 * Converts `value` to a number.
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 4.0.0
-	 * @category Lang
-	 * @param {*} value The value to process.
-	 * @returns {number} Returns the number.
-	 * @example
-	 *
-	 * _.toNumber(3.2);
-	 * // => 3.2
-	 *
-	 * _.toNumber(Number.MIN_VALUE);
-	 * // => 5e-324
-	 *
-	 * _.toNumber(Infinity);
-	 * // => Infinity
-	 *
-	 * _.toNumber('3.2');
-	 * // => 3.2
-	 */
-	function toNumber(value) {
-	  if (typeof value == 'number') {
-	    return value;
-	  }
-	  if (isSymbol$4(value)) {
-	    return NAN;
-	  }
-	  if (isObject$1(value)) {
-	    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
-	    value = isObject$1(other) ? (other + '') : other;
-	  }
-	  if (typeof value != 'string') {
-	    return value === 0 ? value : +value;
-	  }
-	  value = value.replace(reTrim, '');
-	  var isBinary = reIsBinary.test(value);
-	  return (isBinary || reIsOctal.test(value))
-	    ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
-	    : (reIsBadHex.test(value) ? NAN : +value);
-	}
+	  _this.removeFavorite = function (preset) {
+	    var item = _this.favoriteMatching(preset);
 
-	/** Error message constants. */
-	var FUNC_ERROR_TEXT = 'Expected a function';
+	    if (item) {
+	      var items = _this.getFavorites();
 
-	/* Built-in method references for those with the same name as other `lodash` methods. */
-	var nativeMax = Math.max,
-	    nativeMin = Math.min;
+	      items.splice(items.indexOf(item), 1);
+	      setFavorites(items);
+	    }
+	  };
 
-	/**
-	 * Creates a debounced function that delays invoking `func` until after `wait`
-	 * milliseconds have elapsed since the last time the debounced function was
-	 * invoked. The debounced function comes with a `cancel` method to cancel
-	 * delayed `func` invocations and a `flush` method to immediately invoke them.
-	 * Provide `options` to indicate whether `func` should be invoked on the
-	 * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
-	 * with the last arguments provided to the debounced function. Subsequent
-	 * calls to the debounced function return the result of the last `func`
-	 * invocation.
-	 *
-	 * **Note:** If `leading` and `trailing` options are `true`, `func` is
-	 * invoked on the trailing edge of the timeout only if the debounced function
-	 * is invoked more than once during the `wait` timeout.
-	 *
-	 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
-	 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
-	 *
-	 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
-	 * for details over the differences between `_.debounce` and `_.throttle`.
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 0.1.0
-	 * @category Function
-	 * @param {Function} func The function to debounce.
-	 * @param {number} [wait=0] The number of milliseconds to delay.
-	 * @param {Object} [options={}] The options object.
-	 * @param {boolean} [options.leading=false]
-	 *  Specify invoking on the leading edge of the timeout.
-	 * @param {number} [options.maxWait]
-	 *  The maximum time `func` is allowed to be delayed before it's invoked.
-	 * @param {boolean} [options.trailing=true]
-	 *  Specify invoking on the trailing edge of the timeout.
-	 * @returns {Function} Returns the new debounced function.
-	 * @example
-	 *
-	 * // Avoid costly calculations while the window size is in flux.
-	 * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
-	 *
-	 * // Invoke `sendMail` when clicked, debouncing subsequent calls.
-	 * jQuery(element).on('click', _.debounce(sendMail, 300, {
-	 *   'leading': true,
-	 *   'trailing': false
-	 * }));
-	 *
-	 * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
-	 * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
-	 * var source = new EventSource('/stream');
-	 * jQuery(source).on('message', debounced);
-	 *
-	 * // Cancel the trailing debounced invocation.
-	 * jQuery(window).on('popstate', debounced.cancel);
-	 */
-	function debounce(func, wait, options) {
-	  var lastArgs,
-	      lastThis,
-	      maxWait,
-	      result,
-	      timerId,
-	      lastCallTime,
-	      lastInvokeTime = 0,
-	      leading = false,
-	      maxing = false,
-	      trailing = true;
+	  _this.getFavorites = function () {
+	    if (!_favorites) {
+	      // fetch from local storage
+	      var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
 
-	  if (typeof func != 'function') {
-	    throw new TypeError(FUNC_ERROR_TEXT);
-	  }
-	  wait = toNumber(wait) || 0;
-	  if (isObject$1(options)) {
-	    leading = !!options.leading;
-	    maxing = 'maxWait' in options;
-	    maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
-	    trailing = 'trailing' in options ? !!options.trailing : trailing;
-	  }
+	      if (!rawFavorites) {
+	        rawFavorites = [];
+	        corePreferences('preset_favorites', JSON.stringify(rawFavorites));
+	      }
 
-	  function invokeFunc(time) {
-	    var args = lastArgs,
-	        thisArg = lastThis;
+	      _favorites = rawFavorites.reduce(function (output, d) {
+	        var item = ribbonItemForMinified(d, 'favorite');
+	        if (item && item.preset.addable()) output.push(item);
+	        return output;
+	      }, []);
+	    }
 
-	    lastArgs = lastThis = undefined;
-	    lastInvokeTime = time;
-	    result = func.apply(thisArg, args);
-	    return result;
-	  }
+	    return _favorites;
+	  };
 
-	  function leadingEdge(time) {
-	    // Reset any `maxWait` timer.
-	    lastInvokeTime = time;
-	    // Start the timer for the trailing edge.
-	    timerId = setTimeout(timerExpired, wait);
-	    // Invoke the leading edge.
-	    return leading ? invokeFunc(time) : result;
-	  }
+	  _this.favoriteMatching = function (preset) {
+	    var favs = _this.getFavorites();
 
-	  function remainingWait(time) {
-	    var timeSinceLastCall = time - lastCallTime,
-	        timeSinceLastInvoke = time - lastInvokeTime,
-	        timeWaiting = wait - timeSinceLastCall;
+	    for (var index in favs) {
+	      if (favs[index].matches(preset)) {
+	        return favs[index];
+	      }
+	    }
 
-	    return maxing
-	      ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
-	      : timeWaiting;
-	  }
+	    return null;
+	  };
 
-	  function shouldInvoke(time) {
-	    var timeSinceLastCall = time - lastCallTime,
-	        timeSinceLastInvoke = time - lastInvokeTime;
+	  return utilRebind(_this, dispatch$1, 'on');
+	}
 
-	    // Either this is the first call, activity has stopped and we're at the
-	    // trailing edge, the system time has gone backwards and we're treating
-	    // it as the trailing edge, or we've hit the `maxWait` limit.
-	    return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
-	      (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
-	  }
+	function utilTagText(entity) {
+	  var obj = entity && entity.tags || {};
+	  return Object.keys(obj).map(function (k) {
+	    return k + '=' + obj[k];
+	  }).join(', ');
+	}
+	function utilTotalExtent(array, graph) {
+	  var extent = geoExtent();
+	  var val, entity;
 
-	  function timerExpired() {
-	    var time = now$1();
-	    if (shouldInvoke(time)) {
-	      return trailingEdge(time);
+	  for (var i = 0; i < array.length; i++) {
+	    val = array[i];
+	    entity = typeof val === 'string' ? graph.hasEntity(val) : val;
+
+	    if (entity) {
+	      extent._extend(entity.extent(graph));
 	    }
-	    // Restart the timer.
-	    timerId = setTimeout(timerExpired, remainingWait(time));
 	  }
 
-	  function trailingEdge(time) {
-	    timerId = undefined;
-
-	    // Only invoke if we have `lastArgs` which means `func` has been
-	    // debounced at least once.
-	    if (trailing && lastArgs) {
-	      return invokeFunc(time);
+	  return extent;
+	}
+	function utilTagDiff(oldTags, newTags) {
+	  var tagDiff = [];
+	  var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
+	  keys.forEach(function (k) {
+	    var oldVal = oldTags[k];
+	    var newVal = newTags[k];
+
+	    if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
+	      tagDiff.push({
+	        type: '-',
+	        key: k,
+	        oldVal: oldVal,
+	        newVal: newVal,
+	        display: '- ' + k + '=' + oldVal
+	      });
 	    }
-	    lastArgs = lastThis = undefined;
-	    return result;
-	  }
 
-	  function cancel() {
-	    if (timerId !== undefined) {
-	      clearTimeout(timerId);
+	    if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
+	      tagDiff.push({
+	        type: '+',
+	        key: k,
+	        oldVal: oldVal,
+	        newVal: newVal,
+	        display: '+ ' + k + '=' + newVal
+	      });
 	    }
-	    lastInvokeTime = 0;
-	    lastArgs = lastCallTime = lastThis = timerId = undefined;
-	  }
+	  });
+	  return tagDiff;
+	}
+	function utilEntitySelector(ids) {
+	  return ids.length ? '.' + ids.join(',.') : 'nothing';
+	} // returns an selector to select entity ids for:
+	//  - entityIDs passed in
+	//  - shallow descendant entityIDs for any of those entities that are relations
 
-	  function flush() {
-	    return timerId === undefined ? result : trailingEdge(now$1());
+	function utilEntityOrMemberSelector(ids, graph) {
+	  var seen = new Set(ids);
+	  ids.forEach(collectShallowDescendants);
+	  return utilEntitySelector(Array.from(seen));
+
+	  function collectShallowDescendants(id) {
+	    var entity = graph.hasEntity(id);
+	    if (!entity || entity.type !== 'relation') return;
+	    entity.members.map(function (member) {
+	      return member.id;
+	    }).forEach(function (id) {
+	      seen.add(id);
+	    });
 	  }
+	} // returns an selector to select entity ids for:
+	//  - entityIDs passed in
+	//  - deep descendant entityIDs for any of those entities that are relations
 
-	  function debounced() {
-	    var time = now$1(),
-	        isInvoking = shouldInvoke(time);
+	function utilEntityOrDeepMemberSelector(ids, graph) {
+	  return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
+	} // returns an selector to select entity ids for:
+	//  - entityIDs passed in
+	//  - deep descendant entityIDs for any of those entities that are relations
 
-	    lastArgs = arguments;
-	    lastThis = this;
-	    lastCallTime = time;
+	function utilEntityAndDeepMemberIDs(ids, graph) {
+	  var seen = new Set();
+	  ids.forEach(collectDeepDescendants);
+	  return Array.from(seen);
+
+	  function collectDeepDescendants(id) {
+	    if (seen.has(id)) return;
+	    seen.add(id);
+	    var entity = graph.hasEntity(id);
+	    if (!entity || entity.type !== 'relation') return;
+	    entity.members.map(function (member) {
+	      return member.id;
+	    }).forEach(collectDeepDescendants); // recurse
+	  }
+	} // returns an selector to select entity ids for:
+	//  - deep descendant entityIDs for any of those entities that are relations
 
-	    if (isInvoking) {
-	      if (timerId === undefined) {
-	        return leadingEdge(lastCallTime);
-	      }
-	      if (maxing) {
-	        // Handle invocations in a tight loop.
-	        clearTimeout(timerId);
-	        timerId = setTimeout(timerExpired, wait);
-	        return invokeFunc(lastCallTime);
-	      }
-	    }
-	    if (timerId === undefined) {
-	      timerId = setTimeout(timerExpired, wait);
-	    }
-	    return result;
-	  }
-	  debounced.cancel = cancel;
-	  debounced.flush = flush;
-	  return debounced;
-	}
+	function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
+	  var idsSet = new Set(ids);
+	  var seen = new Set();
+	  var returners = new Set();
+	  ids.forEach(collectDeepDescendants);
+	  return utilEntitySelector(Array.from(returners));
 
-	/** Error message constants. */
-	var FUNC_ERROR_TEXT$1 = 'Expected a function';
+	  function collectDeepDescendants(id) {
+	    if (seen.has(id)) return;
+	    seen.add(id);
 
-	/**
-	 * Creates a throttled function that only invokes `func` at most once per
-	 * every `wait` milliseconds. The throttled function comes with a `cancel`
-	 * method to cancel delayed `func` invocations and a `flush` method to
-	 * immediately invoke them. Provide `options` to indicate whether `func`
-	 * should be invoked on the leading and/or trailing edge of the `wait`
-	 * timeout. The `func` is invoked with the last arguments provided to the
-	 * throttled function. Subsequent calls to the throttled function return the
-	 * result of the last `func` invocation.
-	 *
-	 * **Note:** If `leading` and `trailing` options are `true`, `func` is
-	 * invoked on the trailing edge of the timeout only if the throttled function
-	 * is invoked more than once during the `wait` timeout.
-	 *
-	 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
-	 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
-	 *
-	 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
-	 * for details over the differences between `_.throttle` and `_.debounce`.
-	 *
-	 * @static
-	 * @memberOf _
-	 * @since 0.1.0
-	 * @category Function
-	 * @param {Function} func The function to throttle.
-	 * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
-	 * @param {Object} [options={}] The options object.
-	 * @param {boolean} [options.leading=true]
-	 *  Specify invoking on the leading edge of the timeout.
-	 * @param {boolean} [options.trailing=true]
-	 *  Specify invoking on the trailing edge of the timeout.
-	 * @returns {Function} Returns the new throttled function.
-	 * @example
-	 *
-	 * // Avoid excessively updating the position while scrolling.
-	 * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
-	 *
-	 * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
-	 * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
-	 * jQuery(element).on('click', throttled);
-	 *
-	 * // Cancel the trailing throttled invocation.
-	 * jQuery(window).on('popstate', throttled.cancel);
-	 */
-	function throttle(func, wait, options) {
-	  var leading = true,
-	      trailing = true;
+	    if (!idsSet.has(id)) {
+	      returners.add(id);
+	    }
 
-	  if (typeof func != 'function') {
-	    throw new TypeError(FUNC_ERROR_TEXT$1);
-	  }
-	  if (isObject$1(options)) {
-	    leading = 'leading' in options ? !!options.leading : leading;
-	    trailing = 'trailing' in options ? !!options.trailing : trailing;
+	    var entity = graph.hasEntity(id);
+	    if (!entity || entity.type !== 'relation') return;
+	    if (skipMultipolgonMembers && entity.isMultipolygon()) return;
+	    entity.members.map(function (member) {
+	      return member.id;
+	    }).forEach(collectDeepDescendants); // recurse
 	  }
-	  return debounce(func, wait, {
-	    'leading': leading,
-	    'maxWait': wait,
-	    'trailing': trailing
-	  });
-	}
+	} // Adds or removes highlight styling for the specified entities
 
-	var hashes = createCommonjsModule(function (module, exports) {
-	/**
-	 * jshashes - https://github.com/h2non/jshashes
-	 * Released under the "New BSD" license
-	 *
-	 * Algorithms specification:
-	 *
-	 * MD5 - http://www.ietf.org/rfc/rfc1321.txt
-	 * RIPEMD-160 - http://homes.esat.kuleuven.be/~bosselae/ripemd160.html
-	 * SHA1   - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-	 * SHA256 - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-	 * SHA512 - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-	 * HMAC - http://www.ietf.org/rfc/rfc2104.txt
-	 */
-	(function() {
-	  var Hashes;
+	function utilHighlightEntities(ids, highlighted, context) {
+	  context.surface().selectAll(utilEntityOrDeepMemberSelector(ids, context.graph())).classed('highlighted', highlighted);
+	} // returns an Array that is the union of:
+	//  - nodes for any nodeIDs passed in
+	//  - child nodes of any wayIDs passed in
+	//  - descendant member and child nodes of relationIDs passed in
 
-	  function utf8Encode(str) {
-	    var x, y, output = '',
-	      i = -1,
-	      l;
-
-	    if (str && str.length) {
-	      l = str.length;
-	      while ((i += 1) < l) {
-	        /* Decode utf-16 surrogate pairs */
-	        x = str.charCodeAt(i);
-	        y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
-	        if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
-	          x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
-	          i += 1;
-	        }
-	        /* Encode output as utf-8 */
-	        if (x <= 0x7F) {
-	          output += String.fromCharCode(x);
-	        } else if (x <= 0x7FF) {
-	          output += String.fromCharCode(0xC0 | ((x >>> 6) & 0x1F),
-	            0x80 | (x & 0x3F));
-	        } else if (x <= 0xFFFF) {
-	          output += String.fromCharCode(0xE0 | ((x >>> 12) & 0x0F),
-	            0x80 | ((x >>> 6) & 0x3F),
-	            0x80 | (x & 0x3F));
-	        } else if (x <= 0x1FFFFF) {
-	          output += String.fromCharCode(0xF0 | ((x >>> 18) & 0x07),
-	            0x80 | ((x >>> 12) & 0x3F),
-	            0x80 | ((x >>> 6) & 0x3F),
-	            0x80 | (x & 0x3F));
-	        }
-	      }
+	function utilGetAllNodes(ids, graph) {
+	  var seen = new Set();
+	  var nodes = new Set();
+	  ids.forEach(collectNodes);
+	  return Array.from(nodes);
+
+	  function collectNodes(id) {
+	    if (seen.has(id)) return;
+	    seen.add(id);
+	    var entity = graph.hasEntity(id);
+	    if (!entity) return;
+
+	    if (entity.type === 'node') {
+	      nodes.add(entity);
+	    } else if (entity.type === 'way') {
+	      entity.nodes.forEach(collectNodes);
+	    } else {
+	      entity.members.map(function (member) {
+	        return member.id;
+	      }).forEach(collectNodes); // recurse
 	    }
-	    return output;
 	  }
+	}
+	function utilDisplayName(entity) {
+	  var localizedNameKey = 'name:' + _mainLocalizer.languageCode().toLowerCase();
+	  var name = entity.tags[localizedNameKey] || entity.tags.name || '';
+	  var network = entity.tags.cycle_network || entity.tags.network;
 
-	  function utf8Decode(str) {
-	    var i, ac, c1, c2, c3, arr = [],
-	      l;
-	    i = ac = c1 = c2 = c3 = 0;
-
-	    if (str && str.length) {
-	      l = str.length;
-	      str += '';
-
-	      while (i < l) {
-	        c1 = str.charCodeAt(i);
-	        ac += 1;
-	        if (c1 < 128) {
-	          arr[ac] = String.fromCharCode(c1);
-	          i += 1;
-	        } else if (c1 > 191 && c1 < 224) {
-	          c2 = str.charCodeAt(i + 1);
-	          arr[ac] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
-	          i += 2;
-	        } else {
-	          c2 = str.charCodeAt(i + 1);
-	          c3 = str.charCodeAt(i + 2);
-	          arr[ac] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
-	          i += 3;
-	        }
-	      }
+	  if (!name && entity.tags.ref) {
+	    name = entity.tags.ref;
+
+	    if (network) {
+	      name = network + ' ' + name;
 	    }
-	    return arr.join('');
 	  }
 
-	  /**
-	   * Add integers, wrapping at 2^32. This uses 16-bit operations internally
-	   * to work around bugs in some JS interpreters.
-	   */
+	  return name;
+	}
+	function utilDisplayNameForPath(entity) {
+	  var name = utilDisplayName(entity);
+	  var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
 
-	  function safe_add(x, y) {
-	    var lsw = (x & 0xFFFF) + (y & 0xFFFF),
-	      msw = (x >> 16) + (y >> 16) + (lsw >> 16);
-	    return (msw << 16) | (lsw & 0xFFFF);
+	  if (!isFirefox && name && rtlRegex.test(name)) {
+	    name = fixRTLTextForSvg(name);
 	  }
 
-	  /**
-	   * Bitwise rotate a 32-bit number to the left.
-	   */
+	  return name;
+	}
+	function utilDisplayType(id) {
+	  return {
+	    n: _t('inspector.node'),
+	    w: _t('inspector.way'),
+	    r: _t('inspector.relation')
+	  }[id.charAt(0)];
+	}
+	function utilDisplayLabel(entity, graphOrGeometry) {
+	  var displayName = utilDisplayName(entity);
 
-	  function bit_rol(num, cnt) {
-	    return (num << cnt) | (num >>> (32 - cnt));
+	  if (displayName) {
+	    // use the display name if there is one
+	    return displayName;
 	  }
 
-	  /**
-	   * Convert a raw string to a hex string
-	   */
+	  var preset = typeof graphOrGeometry === 'string' ? _mainPresetIndex.matchTags(entity.tags, graphOrGeometry) : _mainPresetIndex.match(entity, graphOrGeometry);
 
-	  function rstr2hex(input, hexcase) {
-	    var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
-	      output = '',
-	      x, i = 0,
-	      l = input.length;
-	    for (; i < l; i += 1) {
-	      x = input.charCodeAt(i);
-	      output += hex_tab.charAt((x >>> 4) & 0x0F) + hex_tab.charAt(x & 0x0F);
-	    }
-	    return output;
-	  }
+	  if (preset && preset.name()) {
+	    // use the preset name if there is a match
+	    return preset.name();
+	  } // fallback to the display type (node/way/relation)
 
-	  /**
-	   * Convert an array of big-endian words to a string
-	   */
 
-	  function binb2rstr(input) {
-	    var i, l = input.length * 32,
-	      output = '';
-	    for (i = 0; i < l; i += 8) {
-	      output += String.fromCharCode((input[i >> 5] >>> (24 - i % 32)) & 0xFF);
-	    }
-	    return output;
+	  return utilDisplayType(entity.id);
+	}
+	function utilEntityRoot(entityType) {
+	  return {
+	    node: 'n',
+	    way: 'w',
+	    relation: 'r'
+	  }[entityType];
+	} // Returns a single object containing the tags of all the given entities.
+	// Example:
+	// {
+	//   highway: 'service',
+	//   service: 'parking_aisle'
+	// }
+	//           +
+	// {
+	//   highway: 'service',
+	//   service: 'driveway',
+	//   width: '3'
+	// }
+	//           =
+	// {
+	//   highway: 'service',
+	//   service: [ 'driveway', 'parking_aisle' ],
+	//   width: [ '3', undefined ]
+	// }
+
+	function utilCombinedTags(entityIDs, graph) {
+	  var tags = {};
+	  var tagCounts = {};
+	  var allKeys = new Set();
+	  var entities = entityIDs.map(function (entityID) {
+	    return graph.hasEntity(entityID);
+	  }).filter(Boolean); // gather the aggregate keys
+
+	  entities.forEach(function (entity) {
+	    var keys = Object.keys(entity.tags).filter(Boolean);
+	    keys.forEach(function (key) {
+	      allKeys.add(key);
+	    });
+	  });
+	  entities.forEach(function (entity) {
+	    allKeys.forEach(function (key) {
+	      var value = entity.tags[key]; // purposely allow `undefined`
+
+	      if (!tags.hasOwnProperty(key)) {
+	        // first value, set as raw
+	        tags[key] = value;
+	      } else {
+	        if (!Array.isArray(tags[key])) {
+	          if (tags[key] !== value) {
+	            // first alternate value, replace single value with array
+	            tags[key] = [tags[key], value];
+	          }
+	        } else {
+	          // type is array
+	          if (tags[key].indexOf(value) === -1) {
+	            // subsequent alternate value, add to array
+	            tags[key].push(value);
+	          }
+	        }
+	      }
+
+	      var tagHash = key + '=' + value;
+	      if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
+	      tagCounts[tagHash] += 1;
+	    });
+	  });
+
+	  for (var key in tags) {
+	    if (!Array.isArray(tags[key])) continue; // sort values by frequency then alphabetically
+
+	    tags[key] = tags[key].sort(function (val1, val2) {
+	      var key = key; // capture
+
+	      var count2 = tagCounts[key + '=' + val2];
+	      var count1 = tagCounts[key + '=' + val1];
+
+	      if (count2 !== count1) {
+	        return count2 - count1;
+	      }
+
+	      if (val2 && val1) {
+	        return val1.localeCompare(val2);
+	      }
+
+	      return val1 ? 1 : -1;
+	    });
 	  }
 
-	  /**
-	   * Convert an array of little-endian words to a string
-	   */
+	  return tags;
+	}
+	function utilStringQs(str) {
+	  var i = 0; // advance past any leading '?' or '#' characters
 
-	  function binl2rstr(input) {
-	    var i, l = input.length * 32,
-	      output = '';
-	    for (i = 0; i < l; i += 8) {
-	      output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF);
-	    }
-	    return output;
+	  while (i < str.length && (str[i] === '?' || str[i] === '#')) {
+	    i++;
 	  }
 
-	  /**
-	   * Convert a raw string to an array of little-endian words
-	   * Characters >255 have their high-byte silently ignored.
-	   */
+	  str = str.slice(i);
+	  return str.split('&').reduce(function (obj, pair) {
+	    var parts = pair.split('=');
 
-	  function rstr2binl(input) {
-	    var i, l = input.length * 8,
-	      output = Array(input.length >> 2),
-	      lo = output.length;
-	    for (i = 0; i < lo; i += 1) {
-	      output[i] = 0;
+	    if (parts.length === 2) {
+	      obj[parts[0]] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
 	    }
-	    for (i = 0; i < l; i += 8) {
-	      output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (i % 32);
-	    }
-	    return output;
+
+	    return obj;
+	  }, {});
+	}
+	function utilQsString(obj, noencode) {
+	  // encode everything except special characters used in certain hash parameters:
+	  // "/" in map states, ":", ",", {" and "}" in background
+	  function softEncode(s) {
+	    return encodeURIComponent(s).replace(/(%2F|%3A|%2C|%7B|%7D)/g, decodeURIComponent);
 	  }
 
-	  /**
-	   * Convert a raw string to an array of big-endian words
-	   * Characters >255 have their high-byte silently ignored.
-	   */
+	  return Object.keys(obj).sort().map(function (key) {
+	    return encodeURIComponent(key) + '=' + (noencode ? softEncode(obj[key]) : encodeURIComponent(obj[key]));
+	  }).join('&');
+	}
+	function utilPrefixDOMProperty(property) {
+	  var prefixes = ['webkit', 'ms', 'moz', 'o'];
+	  var i = -1;
+	  var n = prefixes.length;
+	  var s = document.body;
+	  if (property in s) return property;
+	  property = property.substr(0, 1).toUpperCase() + property.substr(1);
 
-	  function rstr2binb(input) {
-	    var i, l = input.length * 8,
-	      output = Array(input.length >> 2),
-	      lo = output.length;
-	    for (i = 0; i < lo; i += 1) {
-	      output[i] = 0;
-	    }
-	    for (i = 0; i < l; i += 8) {
-	      output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (24 - i % 32);
+	  while (++i < n) {
+	    if (prefixes[i] + property in s) {
+	      return prefixes[i] + property;
 	    }
-	    return output;
 	  }
 
-	  /**
-	   * Convert a raw string to an arbitrary string encoding
-	   */
+	  return false;
+	}
+	function utilPrefixCSSProperty(property) {
+	  var prefixes = ['webkit', 'ms', 'Moz', 'O'];
+	  var i = -1;
+	  var n = prefixes.length;
+	  var s = document.body.style;
 
-	  function rstr2any(input, encoding) {
-	    var divisor = encoding.length,
-	      remainders = Array(),
-	      i, q, x, ld, quotient, dividend, output, full_length;
+	  if (property.toLowerCase() in s) {
+	    return property.toLowerCase();
+	  }
 
-	    /* Convert to an array of 16-bit big-endian values, forming the dividend */
-	    dividend = Array(Math.ceil(input.length / 2));
-	    ld = dividend.length;
-	    for (i = 0; i < ld; i += 1) {
-	      dividend[i] = (input.charCodeAt(i * 2) << 8) | input.charCodeAt(i * 2 + 1);
+	  while (++i < n) {
+	    if (prefixes[i] + property in s) {
+	      return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
 	    }
+	  }
 
-	    /**
-	     * Repeatedly perform a long division. The binary array forms the dividend,
-	     * the length of the encoding is the divisor. Once computed, the quotient
-	     * forms the dividend for the next step. We stop when the dividend is zerHashes.
-	     * All remainders are stored for later use.
-	     */
-	    while (dividend.length > 0) {
-	      quotient = Array();
-	      x = 0;
-	      for (i = 0; i < dividend.length; i += 1) {
-	        x = (x << 16) + dividend[i];
-	        q = Math.floor(x / divisor);
-	        x -= q * divisor;
-	        if (quotient.length > 0 || q > 0) {
-	          quotient[quotient.length] = q;
-	        }
-	      }
-	      remainders[remainders.length] = x;
-	      dividend = quotient;
-	    }
+	  return false;
+	}
+	var transformProperty;
+	function utilSetTransform(el, x, y, scale) {
+	  var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
+	  var translate = utilDetect().opera ? 'translate(' + x + 'px,' + y + 'px)' : 'translate3d(' + x + 'px,' + y + 'px,0)';
+	  return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
+	} // Calculates Levenshtein distance between two strings
+	// see:  https://en.wikipedia.org/wiki/Levenshtein_distance
+	// first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.
 
-	    /* Convert the remainders to the output string */
-	    output = '';
-	    for (i = remainders.length - 1; i >= 0; i--) {
-	      output += encoding.charAt(remainders[i]);
-	    }
+	function utilEditDistance(a, b) {
+	  a = remove$1(a.toLowerCase());
+	  b = remove$1(b.toLowerCase());
+	  if (a.length === 0) return b.length;
+	  if (b.length === 0) return a.length;
+	  var matrix = [];
+	  var i, j;
 
-	    /* Append leading zero equivalents */
-	    full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
-	    for (i = output.length; i < full_length; i += 1) {
-	      output = encoding[0] + output;
-	    }
-	    return output;
+	  for (i = 0; i <= b.length; i++) {
+	    matrix[i] = [i];
 	  }
 
-	  /**
-	   * Convert a raw string to a base-64 string
-	   */
+	  for (j = 0; j <= a.length; j++) {
+	    matrix[0][j] = j;
+	  }
 
-	  function rstr2b64(input, b64pad) {
-	    var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-	      output = '',
-	      len = input.length,
-	      i, j, triplet;
-	    b64pad = b64pad || '=';
-	    for (i = 0; i < len; i += 3) {
-	      triplet = (input.charCodeAt(i) << 16) | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
-	      for (j = 0; j < 4; j += 1) {
-	        if (i * 8 + j * 6 > input.length * 8) {
-	          output += b64pad;
-	        } else {
-	          output += tab.charAt((triplet >>> 6 * (3 - j)) & 0x3F);
-	        }
+	  for (i = 1; i <= b.length; i++) {
+	    for (j = 1; j <= a.length; j++) {
+	      if (b.charAt(i - 1) === a.charAt(j - 1)) {
+	        matrix[i][j] = matrix[i - 1][j - 1];
+	      } else {
+	        matrix[i][j] = Math.min(matrix[i - 1][j - 1] + 1, // substitution
+	        Math.min(matrix[i][j - 1] + 1, // insertion
+	        matrix[i - 1][j] + 1)); // deletion
 	      }
 	    }
-	    return output;
 	  }
 
-	  Hashes = {
-	    /**
-	     * @property {String} version
-	     * @readonly
-	     */
-	    VERSION: '1.0.6',
-	    /**
-	     * @member Hashes
-	     * @class Base64
-	     * @constructor
-	     */
-	    Base64: function() {
-	      // private properties
-	      var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-	        pad = '=', // default pad according with the RFC standard
-	        utf8 = true; // by default enable UTF-8 support encoding
+	  return matrix[b.length][a.length];
+	} // a d3.mouse-alike which
+	// 1. Only works on HTML elements, not SVG
+	// 2. Does not cause style recalculation
 
-	      // public method for encoding
-	      this.encode = function(input) {
-	        var i, j, triplet,
-	          output = '',
-	          len = input.length;
+	function utilFastMouse(container) {
+	  var rect = container.getBoundingClientRect();
+	  var rectLeft = rect.left;
+	  var rectTop = rect.top;
+	  var clientLeft = +container.clientLeft;
+	  var clientTop = +container.clientTop;
+	  return function (e) {
+	    return [e.clientX - rectLeft - clientLeft, e.clientY - rectTop - clientTop];
+	  };
+	}
+	function utilAsyncMap(inputs, func, callback) {
+	  var remaining = inputs.length;
+	  var results = [];
+	  var errors = [];
+	  inputs.forEach(function (d, i) {
+	    func(d, function done(err, data) {
+	      errors[i] = err;
+	      results[i] = data;
+	      remaining--;
+	      if (!remaining) callback(errors, results);
+	    });
+	  });
+	} // wraps an index to an interval [0..length-1]
 
-	        pad = pad || '=';
-	        input = (utf8) ? utf8Encode(input) : input;
+	function utilWrap(index, length) {
+	  if (index < 0) {
+	    index += Math.ceil(-index / length) * length;
+	  }
 
-	        for (i = 0; i < len; i += 3) {
-	          triplet = (input.charCodeAt(i) << 16) | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
-	          for (j = 0; j < 4; j += 1) {
-	            if (i * 8 + j * 6 > len * 8) {
-	              output += pad;
-	            } else {
-	              output += tab.charAt((triplet >>> 6 * (3 - j)) & 0x3F);
-	            }
-	          }
-	        }
-	        return output;
-	      };
+	  return index % length;
+	}
+	/**
+	 * a replacement for functor
+	 *
+	 * @param {*} value any value
+	 * @returns {Function} a function that returns that value or the value if it's a function
+	 */
 
-	      // public method for decoding
-	      this.decode = function(input) {
-	        // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
-	        var i, o1, o2, o3, h1, h2, h3, h4, bits, ac,
-	          dec = '',
-	          arr = [];
-	        if (!input) {
-	          return input;
-	        }
+	function utilFunctor(value) {
+	  if (typeof value === 'function') return value;
+	  return function () {
+	    return value;
+	  };
+	}
+	function utilNoAuto(selection) {
+	  var isText = selection.size() && selection.node().tagName.toLowerCase() === 'textarea';
+	  return selection // assign 'new-password' even for non-password fields to prevent browsers (Chrome) ignoring 'off'
+	  .attr('autocomplete', 'new-password').attr('autocorrect', 'off').attr('autocapitalize', 'off').attr('spellcheck', isText ? 'true' : 'false');
+	} // https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
+	// https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
 
-	        i = ac = 0;
-	        input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
-	        //input += '';
+	function utilHashcode(str) {
+	  var hash = 0;
 
-	        do { // unpack four hexets into three octets using index points in b64
-	          h1 = tab.indexOf(input.charAt(i += 1));
-	          h2 = tab.indexOf(input.charAt(i += 1));
-	          h3 = tab.indexOf(input.charAt(i += 1));
-	          h4 = tab.indexOf(input.charAt(i += 1));
+	  if (str.length === 0) {
+	    return hash;
+	  }
 
-	          bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
+	  for (var i = 0; i < str.length; i++) {
+	    var _char = str.charCodeAt(i);
 
-	          o1 = bits >> 16 & 0xff;
-	          o2 = bits >> 8 & 0xff;
-	          o3 = bits & 0xff;
-	          ac += 1;
+	    hash = (hash << 5) - hash + _char;
+	    hash = hash & hash; // Convert to 32bit integer
+	  }
 
-	          if (h3 === 64) {
-	            arr[ac] = String.fromCharCode(o1);
-	          } else if (h4 === 64) {
-	            arr[ac] = String.fromCharCode(o1, o2);
-	          } else {
-	            arr[ac] = String.fromCharCode(o1, o2, o3);
-	          }
-	        } while (i < input.length);
+	  return hash;
+	} // Returns version of `str` with all runs of special characters replaced by `_`;
+	// suitable for HTML ids, classes, selectors, etc.
 
-	        dec = arr.join('');
-	        dec = (utf8) ? utf8Decode(dec) : dec;
+	function utilSafeClassName(str) {
+	  return str.toLowerCase().replace(/[^a-z0-9]+/g, '_');
+	} // Returns string based on `val` that is highly unlikely to collide with an id
+	// used previously or that's present elsewhere in the document. Useful for preventing
+	// browser-provided autofills or when embedding iD on pages with unknown elements.
 
-	        return dec;
-	      };
+	function utilUniqueDomId(val) {
+	  return 'ideditor-' + utilSafeClassName(val.toString()) + '-' + new Date().getTime().toString();
+	} // Returns the length of `str` in unicode characters. This can be less than
+	// `String.length()` since a single unicode character can be composed of multiple
+	// JavaScript UTF-16 code units.
 
-	      // set custom pad string
-	      this.setPad = function(str) {
-	        pad = str || pad;
-	        return this;
-	      };
-	      // set custom tab string characters
-	      this.setTab = function(str) {
-	        tab = str || tab;
-	        return this;
-	      };
-	      this.setUTF8 = function(bool) {
-	        if (typeof bool === 'boolean') {
-	          utf8 = bool;
-	        }
-	        return this;
-	      };
-	    },
+	function utilUnicodeCharsCount(str) {
+	  // Native ES2015 implementations of `Array.from` split strings into unicode characters
+	  return Array.from(str).length;
+	} // Returns a new string representing `str` cut from its start to `limit` length
+	// in unicode characters. Note that this runs the risk of splitting graphemes.
 
-	    /**
-	     * CRC-32 calculation
-	     * @member Hashes
-	     * @method CRC32
-	     * @static
-	     * @param {String} str Input String
-	     * @return {String}
-	     */
-	    CRC32: function(str) {
-	      var crc = 0,
-	        x = 0,
-	        y = 0,
-	        table, i, iTop;
-	      str = utf8Encode(str);
-
-	      table = [
-	        '00000000 77073096 EE0E612C 990951BA 076DC419 706AF48F E963A535 9E6495A3 0EDB8832 ',
-	        '79DCB8A4 E0D5E91E 97D2D988 09B64C2B 7EB17CBD E7B82D07 90BF1D91 1DB71064 6AB020F2 F3B97148 ',
-	        '84BE41DE 1ADAD47D 6DDDE4EB F4D4B551 83D385C7 136C9856 646BA8C0 FD62F97A 8A65C9EC 14015C4F ',
-	        '63066CD9 FA0F3D63 8D080DF5 3B6E20C8 4C69105E D56041E4 A2677172 3C03E4D1 4B04D447 D20D85FD ',
-	        'A50AB56B 35B5A8FA 42B2986C DBBBC9D6 ACBCF940 32D86CE3 45DF5C75 DCD60DCF ABD13D59 26D930AC ',
-	        '51DE003A C8D75180 BFD06116 21B4F4B5 56B3C423 CFBA9599 B8BDA50F 2802B89E 5F058808 C60CD9B2 ',
-	        'B10BE924 2F6F7C87 58684C11 C1611DAB B6662D3D 76DC4190 01DB7106 98D220BC EFD5102A 71B18589 ',
-	        '06B6B51F 9FBFE4A5 E8B8D433 7807C9A2 0F00F934 9609A88E E10E9818 7F6A0DBB 086D3D2D 91646C97 ',
-	        'E6635C01 6B6B51F4 1C6C6162 856530D8 F262004E 6C0695ED 1B01A57B 8208F4C1 F50FC457 65B0D9C6 ',
-	        '12B7E950 8BBEB8EA FCB9887C 62DD1DDF 15DA2D49 8CD37CF3 FBD44C65 4DB26158 3AB551CE A3BC0074 ',
-	        'D4BB30E2 4ADFA541 3DD895D7 A4D1C46D D3D6F4FB 4369E96A 346ED9FC AD678846 DA60B8D0 44042D73 ',
-	        '33031DE5 AA0A4C5F DD0D7CC9 5005713C 270241AA BE0B1010 C90C2086 5768B525 206F85B3 B966D409 ',
-	        'CE61E49F 5EDEF90E 29D9C998 B0D09822 C7D7A8B4 59B33D17 2EB40D81 B7BD5C3B C0BA6CAD EDB88320 ',
-	        '9ABFB3B6 03B6E20C 74B1D29A EAD54739 9DD277AF 04DB2615 73DC1683 E3630B12 94643B84 0D6D6A3E ',
-	        '7A6A5AA8 E40ECF0B 9309FF9D 0A00AE27 7D079EB1 F00F9344 8708A3D2 1E01F268 6906C2FE F762575D ',
-	        '806567CB 196C3671 6E6B06E7 FED41B76 89D32BE0 10DA7A5A 67DD4ACC F9B9DF6F 8EBEEFF9 17B7BE43 ',
-	        '60B08ED5 D6D6A3E8 A1D1937E 38D8C2C4 4FDFF252 D1BB67F1 A6BC5767 3FB506DD 48B2364B D80D2BDA ',
-	        'AF0A1B4C 36034AF6 41047A60 DF60EFC3 A867DF55 316E8EEF 4669BE79 CB61B38C BC66831A 256FD2A0 ',
-	        '5268E236 CC0C7795 BB0B4703 220216B9 5505262F C5BA3BBE B2BD0B28 2BB45A92 5CB36A04 C2D7FFA7 ',
-	        'B5D0CF31 2CD99E8B 5BDEAE1D 9B64C2B0 EC63F226 756AA39C 026D930A 9C0906A9 EB0E363F 72076785 ',
-	        '05005713 95BF4A82 E2B87A14 7BB12BAE 0CB61B38 92D28E9B E5D5BE0D 7CDCEFB7 0BDBDF21 86D3D2D4 ',
-	        'F1D4E242 68DDB3F8 1FDA836E 81BE16CD F6B9265B 6FB077E1 18B74777 88085AE6 FF0F6A70 66063BCA ',
-	        '11010B5C 8F659EFF F862AE69 616BFFD3 166CCF45 A00AE278 D70DD2EE 4E048354 3903B3C2 A7672661 ',
-	        'D06016F7 4969474D 3E6E77DB AED16A4A D9D65ADC 40DF0B66 37D83BF0 A9BCAE53 DEBB9EC5 47B2CF7F ',
-	        '30B5FFE9 BDBDF21C CABAC28A 53B39330 24B4A3A6 BAD03605 CDD70693 54DE5729 23D967BF B3667A2E ',
-	        'C4614AB8 5D681B02 2A6F2B94 B40BBE37 C30C8EA1 5A05DF1B 2D02EF8D'
-	      ].join('');
-
-	      crc = crc ^ (-1);
-	      for (i = 0, iTop = str.length; i < iTop; i += 1) {
-	        y = (crc ^ str.charCodeAt(i)) & 0xFF;
-	        x = '0x' + table.substr(y * 9, 8);
-	        crc = (crc >>> 8) ^ x;
-	      }
-	      // always return a positive number (that's what >>> 0 does)
-	      return (crc ^ (-1)) >>> 0;
-	    },
-	    /**
-	     * @member Hashes
-	     * @class MD5
-	     * @constructor
-	     * @param {Object} [config]
-	     *
-	     * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
-	     * Digest Algorithm, as defined in RFC 1321.
-	     * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See <http://pajhome.org.uk/crypt/md5> for more infHashes.
-	     */
-	    MD5: function(options) {
-	      /**
-	       * Private config properties. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
-	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false, // hexadecimal output case format. false - lowercase; true - uppercase
-	        b64pad = (options && typeof options.pad === 'string') ? options.pad : '=', // base-64 pad character. Defaults to '=' for strict RFC compliance
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true; // enable/disable utf8 encoding
+	function utilUnicodeCharsTruncated(str, limit) {
+	  return Array.from(str).slice(0, limit).join('');
+	}
 
-	      // privileged (public) methods
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s), hexcase);
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d), hexcase);
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
-	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
-	      /**
-	       * Enable/disable uppercase hexadecimal returned string
-	       * @param {Boolean}
-	       * @return {Object} this
-	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
-	        }
-	        return this;
-	      };
-	      /**
-	       * Defines a base64 pad string
-	       * @param {String} Pad
-	       * @return {Object} this
-	       */
-	      this.setPad = function(a) {
-	        b64pad = a || b64pad;
-	        return this;
-	      };
-	      /**
-	       * Defines a base64 pad string
-	       * @param {Boolean}
-	       * @return {Object} [this]
-	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
-	        }
-	        return this;
-	      };
+	function osmEntity(attrs) {
+	  // For prototypal inheritance.
+	  if (this instanceof osmEntity) return; // Create the appropriate subtype.
 
-	      // private methods
+	  if (attrs && attrs.type) {
+	    return osmEntity[attrs.type].apply(this, arguments);
+	  } else if (attrs && attrs.id) {
+	    return osmEntity[osmEntity.id.type(attrs.id)].apply(this, arguments);
+	  } // Initialize a generic Entity (used only in tests).
 
-	      /**
-	       * Calculate the MD5 of a raw string
-	       */
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binl2rstr(binl(rstr2binl(s), s.length * 8));
-	      }
+	  return new osmEntity().initialize(arguments);
+	}
 
-	      /**
-	       * Calculate the HMAC-MD5, of a key and some data (raw strings)
-	       */
+	osmEntity.id = function (type) {
+	  return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
+	};
 
-	      function rstr_hmac(key, data) {
-	        var bkey, ipad, opad, hash, i;
+	osmEntity.id.next = {
+	  changeset: -1,
+	  node: -1,
+	  way: -1,
+	  relation: -1
+	};
 
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        bkey = rstr2binl(key);
-	        if (bkey.length > 16) {
-	          bkey = binl(bkey, key.length * 8);
-	        }
+	osmEntity.id.fromOSM = function (type, id) {
+	  return type[0] + id;
+	};
 
-	        ipad = Array(16), opad = Array(16);
-	        for (i = 0; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	        }
-	        hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
-	        return binl2rstr(binl(opad.concat(hash), 512 + 128));
-	      }
+	osmEntity.id.toOSM = function (id) {
+	  return id.slice(1);
+	};
 
-	      /**
-	       * Calculate the MD5 of an array of little-endian words, and a bit length.
-	       */
+	osmEntity.id.type = function (id) {
+	  return {
+	    'c': 'changeset',
+	    'n': 'node',
+	    'w': 'way',
+	    'r': 'relation'
+	  }[id[0]];
+	}; // A function suitable for use as the second argument to d3.selection#data().
 
-	      function binl(x, len) {
-	        var i, olda, oldb, oldc, oldd,
-	          a = 1732584193,
-	          b = -271733879,
-	          c = -1732584194,
-	          d = 271733878;
-
-	        /* append padding */
-	        x[len >> 5] |= 0x80 << ((len) % 32);
-	        x[(((len + 64) >>> 9) << 4) + 14] = len;
-
-	        for (i = 0; i < x.length; i += 16) {
-	          olda = a;
-	          oldb = b;
-	          oldc = c;
-	          oldd = d;
-
-	          a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
-	          d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
-	          c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
-	          b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
-	          a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
-	          d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
-	          c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
-	          b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
-	          a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
-	          d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
-	          c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
-	          b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
-	          a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
-	          d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
-	          c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
-	          b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
-
-	          a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
-	          d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
-	          c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
-	          b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
-	          a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
-	          d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
-	          c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
-	          b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
-	          a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
-	          d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
-	          c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
-	          b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
-	          a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
-	          d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
-	          c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
-	          b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
-
-	          a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
-	          d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
-	          c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
-	          b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
-	          a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
-	          d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
-	          c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
-	          b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
-	          a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
-	          d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
-	          c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
-	          b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
-	          a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
-	          d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
-	          c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
-	          b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
-
-	          a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
-	          d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
-	          c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
-	          b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
-	          a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
-	          d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
-	          c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
-	          b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
-	          a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
-	          d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
-	          c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
-	          b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
-	          a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
-	          d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
-	          c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
-	          b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
-
-	          a = safe_add(a, olda);
-	          b = safe_add(b, oldb);
-	          c = safe_add(c, oldc);
-	          d = safe_add(d, oldd);
-	        }
-	        return Array(a, b, c, d);
-	      }
 
-	      /**
-	       * These functions implement the four basic operations the algorithm uses.
-	       */
+	osmEntity.key = function (entity) {
+	  return entity.id + 'v' + (entity.v || 0);
+	};
 
-	      function md5_cmn(q, a, b, x, s, t) {
-	        return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
-	      }
+	var _deprecatedTagValuesByKey;
 
-	      function md5_ff(a, b, c, d, x, s, t) {
-	        return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
-	      }
+	osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
+	  if (!_deprecatedTagValuesByKey) {
+	    _deprecatedTagValuesByKey = {};
+	    dataDeprecated.forEach(function (d) {
+	      var oldKeys = Object.keys(d.old);
 
-	      function md5_gg(a, b, c, d, x, s, t) {
-	        return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
-	      }
+	      if (oldKeys.length === 1) {
+	        var oldKey = oldKeys[0];
+	        var oldValue = d.old[oldKey];
 
-	      function md5_hh(a, b, c, d, x, s, t) {
-	        return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+	        if (oldValue !== '*') {
+	          if (!_deprecatedTagValuesByKey[oldKey]) {
+	            _deprecatedTagValuesByKey[oldKey] = [oldValue];
+	          } else {
+	            _deprecatedTagValuesByKey[oldKey].push(oldValue);
+	          }
+	        }
 	      }
+	    });
+	  }
 
-	      function md5_ii(a, b, c, d, x, s, t) {
-	        return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
-	      }
-	    },
-	    /**
-	     * @member Hashes
-	     * @class Hashes.SHA1
-	     * @param {Object} [config]
-	     * @constructor
-	     *
-	     * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined in FIPS 180-1
-	     * Version 2.2 Copyright Paul Johnston 2000 - 2009.
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See http://pajhome.org.uk/crypt/md5 for details.
-	     */
-	    SHA1: function(options) {
-	      /**
-	       * Private config properties. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
-	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false, // hexadecimal output case format. false - lowercase; true - uppercase
-	        b64pad = (options && typeof options.pad === 'string') ? options.pad : '=', // base-64 pad character. Defaults to '=' for strict RFC compliance
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true; // enable/disable utf8 encoding
+	  return _deprecatedTagValuesByKey;
+	};
 
-	      // public methods
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s), hexcase);
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d));
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
-	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       * @public
-	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
-	      /**
-	       * @description Enable/disable uppercase hexadecimal returned string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
-	        }
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {string} Pad
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setPad = function(a) {
-	        b64pad = a || b64pad;
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
+	osmEntity.prototype = {
+	  tags: {},
+	  initialize: function initialize(sources) {
+	    for (var i = 0; i < sources.length; ++i) {
+	      var source = sources[i];
+
+	      for (var prop in source) {
+	        if (Object.prototype.hasOwnProperty.call(source, prop)) {
+	          if (source[prop] === undefined) {
+	            delete this[prop];
+	          } else {
+	            this[prop] = source[prop];
+	          }
 	        }
-	        return this;
-	      };
+	      }
+	    }
 
-	      // private methods
+	    if (!this.id && this.type) {
+	      this.id = osmEntity.id(this.type);
+	    }
 
-	      /**
-	       * Calculate the SHA-512 of a raw string
-	       */
+	    if (!this.hasOwnProperty('visible')) {
+	      this.visible = true;
+	    }
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binb2rstr(binb(rstr2binb(s), s.length * 8));
-	      }
+	    return this;
+	  },
+	  copy: function copy(resolver, copies) {
+	    if (copies[this.id]) return copies[this.id];
+	    var copy = osmEntity(this, {
+	      id: undefined,
+	      user: undefined,
+	      version: undefined
+	    });
+	    copies[this.id] = copy;
+	    return copy;
+	  },
+	  osmId: function osmId() {
+	    return osmEntity.id.toOSM(this.id);
+	  },
+	  isNew: function isNew() {
+	    return this.osmId() < 0;
+	  },
+	  update: function update(attrs) {
+	    return osmEntity(this, attrs, {
+	      v: 1 + (this.v || 0)
+	    });
+	  },
+	  mergeTags: function mergeTags(tags) {
+	    var merged = Object.assign({}, this.tags); // shallow copy
 
-	      /**
-	       * Calculate the HMAC-SHA1 of a key and some data (raw strings)
-	       */
+	    var changed = false;
 
-	      function rstr_hmac(key, data) {
-	        var bkey, ipad, opad, i, hash;
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        bkey = rstr2binb(key);
+	    for (var k in tags) {
+	      var t1 = merged[k];
+	      var t2 = tags[k];
+
+	      if (!t1) {
+	        changed = true;
+	        merged[k] = t2;
+	      } else if (t1 !== t2) {
+	        changed = true;
+	        merged[k] = utilUnicodeCharsTruncated(utilArrayUnion(t1.split(/;\s*/), t2.split(/;\s*/)).join(';'), 255 // avoid exceeding character limit; see also services/osm.js -> maxCharsForTagValue()
+	        );
+	      }
+	    }
 
-	        if (bkey.length > 16) {
-	          bkey = binb(bkey, key.length * 8);
-	        }
-	        ipad = Array(16), opad = Array(16);
-	        for (i = 0; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	        }
-	        hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
-	        return binb2rstr(binb(opad.concat(hash), 512 + 160));
+	    return changed ? this.update({
+	      tags: merged
+	    }) : this;
+	  },
+	  intersects: function intersects(extent, resolver) {
+	    return this.extent(resolver).intersects(extent);
+	  },
+	  hasNonGeometryTags: function hasNonGeometryTags() {
+	    return Object.keys(this.tags).some(function (k) {
+	      return k !== 'area';
+	    });
+	  },
+	  hasParentRelations: function hasParentRelations(resolver) {
+	    return resolver.parentRelations(this).length > 0;
+	  },
+	  hasInterestingTags: function hasInterestingTags() {
+	    return Object.keys(this.tags).some(osmIsInterestingTag);
+	  },
+	  hasWikidata: function hasWikidata() {
+	    return !!this.tags.wikidata || !!this.tags['brand:wikidata'];
+	  },
+	  isHighwayIntersection: function isHighwayIntersection() {
+	    return false;
+	  },
+	  isDegenerate: function isDegenerate() {
+	    return true;
+	  },
+	  deprecatedTags: function deprecatedTags(dataDeprecated) {
+	    var tags = this.tags; // if there are no tags, none can be deprecated
+
+	    if (Object.keys(tags).length === 0) return [];
+	    var deprecated = [];
+	    dataDeprecated.forEach(function (d) {
+	      var oldKeys = Object.keys(d.old);
+
+	      if (d.replace) {
+	        var hasExistingValues = Object.keys(d.replace).some(function (replaceKey) {
+	          if (!tags[replaceKey] || d.old[replaceKey]) return false;
+	          var replaceValue = d.replace[replaceKey];
+	          if (replaceValue === '*') return false;
+	          if (replaceValue === tags[replaceKey]) return false;
+	          return true;
+	        }); // don't flag deprecated tags if the upgrade path would overwrite existing data - #7843
+
+	        if (hasExistingValues) return;
 	      }
 
-	      /**
-	       * Calculate the SHA-1 of an array of big-endian words, and a bit length
-	       */
+	      var matchesDeprecatedTags = oldKeys.every(function (oldKey) {
+	        if (!tags[oldKey]) return false;
+	        if (d.old[oldKey] === '*') return true;
+	        if (d.old[oldKey] === tags[oldKey]) return true;
+	        var vals = tags[oldKey].split(';').filter(Boolean);
 
-	      function binb(x, len) {
-	        var i, j, t, olda, oldb, oldc, oldd, olde,
-	          w = Array(80),
-	          a = 1732584193,
-	          b = -271733879,
-	          c = -1732584194,
-	          d = 271733878,
-	          e = -1009589776;
-
-	        /* append padding */
-	        x[len >> 5] |= 0x80 << (24 - len % 32);
-	        x[((len + 64 >> 9) << 4) + 15] = len;
-
-	        for (i = 0; i < x.length; i += 16) {
-	          olda = a;
-	          oldb = b;
-	          oldc = c;
-	          oldd = d;
-	          olde = e;
-
-	          for (j = 0; j < 80; j += 1) {
-	            if (j < 16) {
-	              w[j] = x[i + j];
+	        if (vals.length === 0) {
+	          return false;
+	        } else if (vals.length > 1) {
+	          return vals.indexOf(d.old[oldKey]) !== -1;
+	        } else {
+	          if (tags[oldKey] === d.old[oldKey]) {
+	            if (d.replace && d.old[oldKey] === d.replace[oldKey]) {
+	              var replaceKeys = Object.keys(d.replace);
+	              return !replaceKeys.every(function (replaceKey) {
+	                return tags[replaceKey] === d.replace[replaceKey];
+	              });
 	            } else {
-	              w[j] = bit_rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
+	              return true;
 	            }
-	            t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)),
-	              safe_add(safe_add(e, w[j]), sha1_kt(j)));
-	            e = d;
-	            d = c;
-	            c = bit_rol(b, 30);
-	            b = a;
-	            a = t;
 	          }
-
-	          a = safe_add(a, olda);
-	          b = safe_add(b, oldb);
-	          c = safe_add(c, oldc);
-	          d = safe_add(d, oldd);
-	          e = safe_add(e, olde);
 	        }
-	        return Array(a, b, c, d, e);
-	      }
 
-	      /**
-	       * Perform the appropriate triplet combination function for the current
-	       * iteration
-	       */
+	        return false;
+	      });
 
-	      function sha1_ft(t, b, c, d) {
-	        if (t < 20) {
-	          return (b & c) | ((~b) & d);
-	        }
-	        if (t < 40) {
-	          return b ^ c ^ d;
-	        }
-	        if (t < 60) {
-	          return (b & c) | (b & d) | (c & d);
-	        }
-	        return b ^ c ^ d;
+	      if (matchesDeprecatedTags) {
+	        deprecated.push(d);
 	      }
+	    });
+	    return deprecated;
+	  }
+	};
 
-	      /**
-	       * Determine the appropriate additive constant for the current iteration
-	       */
+	function osmLanes(entity) {
+	  if (entity.type !== 'way') return null;
+	  if (!entity.tags.highway) return null;
+	  var tags = entity.tags;
+	  var isOneWay = entity.isOneWay();
+	  var laneCount = getLaneCount(tags, isOneWay);
+	  var maxspeed = parseMaxspeed(tags);
+	  var laneDirections = parseLaneDirections(tags, isOneWay, laneCount);
+	  var forward = laneDirections.forward;
+	  var backward = laneDirections.backward;
+	  var bothways = laneDirections.bothways; // parse the piped string 'x|y|z' format
+
+	  var turnLanes = {};
+	  turnLanes.unspecified = parseTurnLanes(tags['turn:lanes']);
+	  turnLanes.forward = parseTurnLanes(tags['turn:lanes:forward']);
+	  turnLanes.backward = parseTurnLanes(tags['turn:lanes:backward']);
+	  var maxspeedLanes = {};
+	  maxspeedLanes.unspecified = parseMaxspeedLanes(tags['maxspeed:lanes'], maxspeed);
+	  maxspeedLanes.forward = parseMaxspeedLanes(tags['maxspeed:lanes:forward'], maxspeed);
+	  maxspeedLanes.backward = parseMaxspeedLanes(tags['maxspeed:lanes:backward'], maxspeed);
+	  var psvLanes = {};
+	  psvLanes.unspecified = parseMiscLanes(tags['psv:lanes']);
+	  psvLanes.forward = parseMiscLanes(tags['psv:lanes:forward']);
+	  psvLanes.backward = parseMiscLanes(tags['psv:lanes:backward']);
+	  var busLanes = {};
+	  busLanes.unspecified = parseMiscLanes(tags['bus:lanes']);
+	  busLanes.forward = parseMiscLanes(tags['bus:lanes:forward']);
+	  busLanes.backward = parseMiscLanes(tags['bus:lanes:backward']);
+	  var taxiLanes = {};
+	  taxiLanes.unspecified = parseMiscLanes(tags['taxi:lanes']);
+	  taxiLanes.forward = parseMiscLanes(tags['taxi:lanes:forward']);
+	  taxiLanes.backward = parseMiscLanes(tags['taxi:lanes:backward']);
+	  var hovLanes = {};
+	  hovLanes.unspecified = parseMiscLanes(tags['hov:lanes']);
+	  hovLanes.forward = parseMiscLanes(tags['hov:lanes:forward']);
+	  hovLanes.backward = parseMiscLanes(tags['hov:lanes:backward']);
+	  var hgvLanes = {};
+	  hgvLanes.unspecified = parseMiscLanes(tags['hgv:lanes']);
+	  hgvLanes.forward = parseMiscLanes(tags['hgv:lanes:forward']);
+	  hgvLanes.backward = parseMiscLanes(tags['hgv:lanes:backward']);
+	  var bicyclewayLanes = {};
+	  bicyclewayLanes.unspecified = parseBicycleWay(tags['bicycleway:lanes']);
+	  bicyclewayLanes.forward = parseBicycleWay(tags['bicycleway:lanes:forward']);
+	  bicyclewayLanes.backward = parseBicycleWay(tags['bicycleway:lanes:backward']);
+	  var lanesObj = {
+	    forward: [],
+	    backward: [],
+	    unspecified: []
+	  }; // map forward/backward/unspecified of each lane type to lanesObj
+
+	  mapToLanesObj(lanesObj, turnLanes, 'turnLane');
+	  mapToLanesObj(lanesObj, maxspeedLanes, 'maxspeed');
+	  mapToLanesObj(lanesObj, psvLanes, 'psv');
+	  mapToLanesObj(lanesObj, busLanes, 'bus');
+	  mapToLanesObj(lanesObj, taxiLanes, 'taxi');
+	  mapToLanesObj(lanesObj, hovLanes, 'hov');
+	  mapToLanesObj(lanesObj, hgvLanes, 'hgv');
+	  mapToLanesObj(lanesObj, bicyclewayLanes, 'bicycleway');
+	  return {
+	    metadata: {
+	      count: laneCount,
+	      oneway: isOneWay,
+	      forward: forward,
+	      backward: backward,
+	      bothways: bothways,
+	      turnLanes: turnLanes,
+	      maxspeed: maxspeed,
+	      maxspeedLanes: maxspeedLanes,
+	      psvLanes: psvLanes,
+	      busLanes: busLanes,
+	      taxiLanes: taxiLanes,
+	      hovLanes: hovLanes,
+	      hgvLanes: hgvLanes,
+	      bicyclewayLanes: bicyclewayLanes
+	    },
+	    lanes: lanesObj
+	  };
+	}
 
-	      function sha1_kt(t) {
-	        return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
-	          (t < 60) ? -1894007588 : -899497514;
-	      }
-	    },
-	    /**
-	     * @class Hashes.SHA256
-	     * @param {config}
-	     *
-	     * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined in FIPS 180-2
-	     * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See http://pajhome.org.uk/crypt/md5 for details.
-	     * Also http://anmar.eu.org/projects/jssha2/
-	     */
-	    SHA256: function(options) {
-	      /**
-	       * Private properties configuration variables. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * @see this.setUpperCase() method
-	       * @see this.setPad() method
-	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false, // hexadecimal output case format. false - lowercase; true - uppercase  */
-	        b64pad = (options && typeof options.pad === 'string') ? options.pad : '=',
-	        /* base-64 pad character. Default '=' for strict RFC compliance   */
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true,
-	        /* enable/disable utf8 encoding */
-	        sha256_K;
+	function getLaneCount(tags, isOneWay) {
+	  var count;
 
-	      /* privileged (public) methods */
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s, utf8));
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s, utf8), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s, utf8), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s, utf8);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d));
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
-	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       * @public
-	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
-	      /**
-	       * Enable/disable uppercase hexadecimal returned string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
-	        }
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {string} Pad
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setPad = function(a) {
-	        b64pad = a || b64pad;
-	        return this;
-	      };
-	      /**
-	       * Defines a base64 pad string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
-	        }
-	        return this;
-	      };
+	  if (tags.lanes) {
+	    count = parseInt(tags.lanes, 10);
+
+	    if (count > 0) {
+	      return count;
+	    }
+	  }
 
-	      // private methods
+	  switch (tags.highway) {
+	    case 'trunk':
+	    case 'motorway':
+	      count = isOneWay ? 2 : 4;
+	      break;
 
-	      /**
-	       * Calculate the SHA-512 of a raw string
-	       */
+	    default:
+	      count = isOneWay ? 1 : 2;
+	      break;
+	  }
 
-	      function rstr(s, utf8) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binb2rstr(binb(rstr2binb(s), s.length * 8));
-	      }
+	  return count;
+	}
 
-	      /**
-	       * Calculate the HMAC-sha256 of a key and some data (raw strings)
-	       */
+	function parseMaxspeed(tags) {
+	  var maxspeed = tags.maxspeed;
+	  if (!maxspeed) return;
+	  var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
+	  if (!maxspeedRegex.test(maxspeed)) return;
+	  return parseInt(maxspeed, 10);
+	}
 
-	      function rstr_hmac(key, data) {
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        var hash, i = 0,
-	          bkey = rstr2binb(key),
-	          ipad = Array(16),
-	          opad = Array(16);
+	function parseLaneDirections(tags, isOneWay, laneCount) {
+	  var forward = parseInt(tags['lanes:forward'], 10);
+	  var backward = parseInt(tags['lanes:backward'], 10);
+	  var bothways = parseInt(tags['lanes:both_ways'], 10) > 0 ? 1 : 0;
 
-	        if (bkey.length > 16) {
-	          bkey = binb(bkey, key.length * 8);
-	        }
+	  if (parseInt(tags.oneway, 10) === -1) {
+	    forward = 0;
+	    bothways = 0;
+	    backward = laneCount;
+	  } else if (isOneWay) {
+	    forward = laneCount;
+	    bothways = 0;
+	    backward = 0;
+	  } else if (isNaN(forward) && isNaN(backward)) {
+	    backward = Math.floor((laneCount - bothways) / 2);
+	    forward = laneCount - bothways - backward;
+	  } else if (isNaN(forward)) {
+	    if (backward > laneCount - bothways) {
+	      backward = laneCount - bothways;
+	    }
 
-	        for (; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	        }
+	    forward = laneCount - bothways - backward;
+	  } else if (isNaN(backward)) {
+	    if (forward > laneCount - bothways) {
+	      forward = laneCount - bothways;
+	    }
 
-	        hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
-	        return binb2rstr(binb(opad.concat(hash), 512 + 256));
-	      }
+	    backward = laneCount - bothways - forward;
+	  }
 
-	      /*
-	       * Main sha256 function, with its support functions
-	       */
+	  return {
+	    forward: forward,
+	    backward: backward,
+	    bothways: bothways
+	  };
+	}
 
-	      function sha256_S(X, n) {
-	        return (X >>> n) | (X << (32 - n));
-	      }
+	function parseTurnLanes(tag) {
+	  if (!tag) return;
+	  var validValues = ['left', 'slight_left', 'sharp_left', 'through', 'right', 'slight_right', 'sharp_right', 'reverse', 'merge_to_left', 'merge_to_right', 'none'];
+	  return tag.split('|').map(function (s) {
+	    if (s === '') s = 'none';
+	    return s.split(';').map(function (d) {
+	      return validValues.indexOf(d) === -1 ? 'unknown' : d;
+	    });
+	  });
+	}
 
-	      function sha256_R(X, n) {
-	        return (X >>> n);
-	      }
+	function parseMaxspeedLanes(tag, maxspeed) {
+	  if (!tag) return;
+	  return tag.split('|').map(function (s) {
+	    if (s === 'none') return s;
+	    var m = parseInt(s, 10);
+	    if (s === '' || m === maxspeed) return null;
+	    return isNaN(m) ? 'unknown' : m;
+	  });
+	}
 
-	      function sha256_Ch(x, y, z) {
-	        return ((x & y) ^ ((~x) & z));
-	      }
+	function parseMiscLanes(tag) {
+	  if (!tag) return;
+	  var validValues = ['yes', 'no', 'designated'];
+	  return tag.split('|').map(function (s) {
+	    if (s === '') s = 'no';
+	    return validValues.indexOf(s) === -1 ? 'unknown' : s;
+	  });
+	}
 
-	      function sha256_Maj(x, y, z) {
-	        return ((x & y) ^ (x & z) ^ (y & z));
-	      }
+	function parseBicycleWay(tag) {
+	  if (!tag) return;
+	  var validValues = ['yes', 'no', 'designated', 'lane'];
+	  return tag.split('|').map(function (s) {
+	    if (s === '') s = 'no';
+	    return validValues.indexOf(s) === -1 ? 'unknown' : s;
+	  });
+	}
 
-	      function sha256_Sigma0256(x) {
-	        return (sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22));
-	      }
+	function mapToLanesObj(lanesObj, data, key) {
+	  if (data.forward) data.forward.forEach(function (l, i) {
+	    if (!lanesObj.forward[i]) lanesObj.forward[i] = {};
+	    lanesObj.forward[i][key] = l;
+	  });
+	  if (data.backward) data.backward.forEach(function (l, i) {
+	    if (!lanesObj.backward[i]) lanesObj.backward[i] = {};
+	    lanesObj.backward[i][key] = l;
+	  });
+	  if (data.unspecified) data.unspecified.forEach(function (l, i) {
+	    if (!lanesObj.unspecified[i]) lanesObj.unspecified[i] = {};
+	    lanesObj.unspecified[i][key] = l;
+	  });
+	}
 
-	      function sha256_Sigma1256(x) {
-	        return (sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25));
-	      }
+	function osmWay() {
+	  if (!(this instanceof osmWay)) {
+	    return new osmWay().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
+	}
+	osmEntity.way = osmWay;
+	osmWay.prototype = Object.create(osmEntity.prototype);
+	Object.assign(osmWay.prototype, {
+	  type: 'way',
+	  nodes: [],
+	  copy: function copy(resolver, copies) {
+	    if (copies[this.id]) return copies[this.id];
+	    var copy = osmEntity.prototype.copy.call(this, resolver, copies);
+	    var nodes = this.nodes.map(function (id) {
+	      return resolver.entity(id).copy(resolver, copies).id;
+	    });
+	    copy = copy.update({
+	      nodes: nodes
+	    });
+	    copies[this.id] = copy;
+	    return copy;
+	  },
+	  extent: function extent(resolver) {
+	    return resolver["transient"](this, 'extent', function () {
+	      var extent = geoExtent();
 
-	      function sha256_Gamma0256(x) {
-	        return (sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3));
-	      }
+	      for (var i = 0; i < this.nodes.length; i++) {
+	        var node = resolver.hasEntity(this.nodes[i]);
 
-	      function sha256_Gamma1256(x) {
-	        return (sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10));
+	        if (node) {
+	          extent._extend(node.extent());
+	        }
 	      }
 
-	      sha256_K = [
-	        1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993, -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987,
-	        1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522,
-	        264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986, -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585,
-	        113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291,
-	        1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885, -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344,
-	        430227734, 506948616, 659060556, 883997877, 958139571, 1322822218,
-	        1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872, -1866530822, -1538233109, -1090935817, -965641998
-	      ];
-
-	      function binb(m, l) {
-	        var HASH = [1779033703, -1150833019, 1013904242, -1521486534,
-	          1359893119, -1694144372, 528734635, 1541459225
-	        ];
-	        var W = new Array(64);
-	        var a, b, c, d, e, f, g, h;
-	        var i, j, T1, T2;
-
-	        /* append padding */
-	        m[l >> 5] |= 0x80 << (24 - l % 32);
-	        m[((l + 64 >> 9) << 4) + 15] = l;
-
-	        for (i = 0; i < m.length; i += 16) {
-	          a = HASH[0];
-	          b = HASH[1];
-	          c = HASH[2];
-	          d = HASH[3];
-	          e = HASH[4];
-	          f = HASH[5];
-	          g = HASH[6];
-	          h = HASH[7];
-
-	          for (j = 0; j < 64; j += 1) {
-	            if (j < 16) {
-	              W[j] = m[j + i];
-	            } else {
-	              W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]),
-	                sha256_Gamma0256(W[j - 15])), W[j - 16]);
-	            }
+	      return extent;
+	    });
+	  },
+	  first: function first() {
+	    return this.nodes[0];
+	  },
+	  last: function last() {
+	    return this.nodes[this.nodes.length - 1];
+	  },
+	  contains: function contains(node) {
+	    return this.nodes.indexOf(node) >= 0;
+	  },
+	  affix: function affix(node) {
+	    if (this.nodes[0] === node) return 'prefix';
+	    if (this.nodes[this.nodes.length - 1] === node) return 'suffix';
+	  },
+	  layer: function layer() {
+	    // explicit layer tag, clamp between -10, 10..
+	    if (isFinite(this.tags.layer)) {
+	      return Math.max(-10, Math.min(+this.tags.layer, 10));
+	    } // implied layer tag..
+
+
+	    if (this.tags.covered === 'yes') return -1;
+	    if (this.tags.location === 'overground') return 1;
+	    if (this.tags.location === 'underground') return -1;
+	    if (this.tags.location === 'underwater') return -10;
+	    if (this.tags.power === 'line') return 10;
+	    if (this.tags.power === 'minor_line') return 10;
+	    if (this.tags.aerialway) return 10;
+	    if (this.tags.bridge) return 1;
+	    if (this.tags.cutting) return -1;
+	    if (this.tags.tunnel) return -1;
+	    if (this.tags.waterway) return -1;
+	    if (this.tags.man_made === 'pipeline') return -10;
+	    if (this.tags.boundary) return -10;
+	    return 0;
+	  },
+	  // the approximate width of the line based on its tags except its `width` tag
+	  impliedLineWidthMeters: function impliedLineWidthMeters() {
+	    var averageWidths = {
+	      highway: {
+	        // width is for single lane
+	        motorway: 5,
+	        motorway_link: 5,
+	        trunk: 4.5,
+	        trunk_link: 4.5,
+	        primary: 4,
+	        secondary: 4,
+	        tertiary: 4,
+	        primary_link: 4,
+	        secondary_link: 4,
+	        tertiary_link: 4,
+	        unclassified: 4,
+	        road: 4,
+	        living_street: 4,
+	        bus_guideway: 4,
+	        pedestrian: 4,
+	        residential: 3.5,
+	        service: 3.5,
+	        track: 3,
+	        cycleway: 2.5,
+	        bridleway: 2,
+	        corridor: 2,
+	        steps: 2,
+	        path: 1.5,
+	        footway: 1.5
+	      },
+	      railway: {
+	        // width includes ties and rail bed, not just track gauge
+	        rail: 2.5,
+	        light_rail: 2.5,
+	        tram: 2.5,
+	        subway: 2.5,
+	        monorail: 2.5,
+	        funicular: 2.5,
+	        disused: 2.5,
+	        preserved: 2.5,
+	        miniature: 1.5,
+	        narrow_gauge: 1.5
+	      },
+	      waterway: {
+	        river: 50,
+	        canal: 25,
+	        stream: 5,
+	        tidal_channel: 5,
+	        fish_pass: 2.5,
+	        drain: 2.5,
+	        ditch: 1.5
+	      }
+	    };
 
-	            T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)),
-	              sha256_K[j]), W[j]);
-	            T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
-	            h = g;
-	            g = f;
-	            f = e;
-	            e = safe_add(d, T1);
-	            d = c;
-	            c = b;
-	            b = a;
-	            a = safe_add(T1, T2);
-	          }
+	    for (var key in averageWidths) {
+	      if (this.tags[key] && averageWidths[key][this.tags[key]]) {
+	        var width = averageWidths[key][this.tags[key]];
 
-	          HASH[0] = safe_add(a, HASH[0]);
-	          HASH[1] = safe_add(b, HASH[1]);
-	          HASH[2] = safe_add(c, HASH[2]);
-	          HASH[3] = safe_add(d, HASH[3]);
-	          HASH[4] = safe_add(e, HASH[4]);
-	          HASH[5] = safe_add(f, HASH[5]);
-	          HASH[6] = safe_add(g, HASH[6]);
-	          HASH[7] = safe_add(h, HASH[7]);
+	        if (key === 'highway') {
+	          var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
+	          if (!laneCount) laneCount = this.isOneWay() ? 1 : 2;
+	          return width * laneCount;
 	        }
-	        return HASH;
+
+	        return width;
 	      }
+	    }
 
-	    },
+	    return null;
+	  },
+	  isOneWay: function isOneWay() {
+	    // explicit oneway tag..
+	    var values = {
+	      'yes': true,
+	      '1': true,
+	      '-1': true,
+	      'reversible': true,
+	      'alternating': true,
+	      'no': false,
+	      '0': false
+	    };
 
-	    /**
-	     * @class Hashes.SHA512
-	     * @param {config}
-	     *
-	     * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined in FIPS 180-2
-	     * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See http://pajhome.org.uk/crypt/md5 for details.
-	     */
-	    SHA512: function(options) {
-	      /**
-	       * Private properties configuration variables. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * @see this.setUpperCase() method
-	       * @see this.setPad() method
-	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false,
-	        /* hexadecimal output case format. false - lowercase; true - uppercase  */
-	        b64pad = (options && typeof options.pad === 'string') ? options.pad : '=',
-	        /* base-64 pad character. Default '=' for strict RFC compliance   */
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true,
-	        /* enable/disable utf8 encoding */
-	        sha512_k;
+	    if (values[this.tags.oneway] !== undefined) {
+	      return values[this.tags.oneway];
+	    } // implied oneway tag..
 
-	      /* privileged (public) methods */
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s));
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d));
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
-	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       * @public
-	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
-	      /**
-	       * @description Enable/disable uppercase hexadecimal returned string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
-	        }
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {string} Pad
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setPad = function(a) {
-	        b64pad = a || b64pad;
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
+
+	    for (var key in this.tags) {
+	      if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) return true;
+	    }
+
+	    return false;
+	  },
+	  // Some identifier for tag that implies that this way is "sided",
+	  // i.e. the right side is the 'inside' (e.g. the right side of a
+	  // natural=cliff is lower).
+	  sidednessIdentifier: function sidednessIdentifier() {
+	    for (var key in this.tags) {
+	      var value = this.tags[key];
+
+	      if (key in osmRightSideIsInsideTags && value in osmRightSideIsInsideTags[key]) {
+	        if (osmRightSideIsInsideTags[key][value] === true) {
+	          return key;
+	        } else {
+	          // if the map's value is something other than a
+	          // literal true, we should use it so we can
+	          // special case some keys (e.g. natural=coastline
+	          // is handled differently to other naturals).
+	          return osmRightSideIsInsideTags[key][value];
 	        }
-	        return this;
-	      };
+	      }
+	    }
+
+	    return null;
+	  },
+	  isSided: function isSided() {
+	    if (this.tags.two_sided === 'yes') {
+	      return false;
+	    }
 
-	      /* private methods */
+	    return this.sidednessIdentifier() !== null;
+	  },
+	  lanes: function lanes() {
+	    return osmLanes(this);
+	  },
+	  isClosed: function isClosed() {
+	    return this.nodes.length > 1 && this.first() === this.last();
+	  },
+	  isConvex: function isConvex(resolver) {
+	    if (!this.isClosed() || this.isDegenerate()) return null;
+	    var nodes = utilArrayUniq(resolver.childNodes(this));
+	    var coords = nodes.map(function (n) {
+	      return n.loc;
+	    });
+	    var curr = 0;
+	    var prev = 0;
 
-	      /**
-	       * Calculate the SHA-512 of a raw string
-	       */
+	    for (var i = 0; i < coords.length; i++) {
+	      var o = coords[(i + 1) % coords.length];
+	      var a = coords[i];
+	      var b = coords[(i + 2) % coords.length];
+	      var res = geoVecCross(a, b, o);
+	      curr = res > 0 ? 1 : res < 0 ? -1 : 0;
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binb2rstr(binb(rstr2binb(s), s.length * 8));
+	      if (curr === 0) {
+	        continue;
+	      } else if (prev && curr !== prev) {
+	        return false;
 	      }
-	      /*
-	       * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
-	       */
 
-	      function rstr_hmac(key, data) {
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
+	      prev = curr;
+	    }
 
-	        var hash, i = 0,
-	          bkey = rstr2binb(key),
-	          ipad = Array(32),
-	          opad = Array(32);
+	    return true;
+	  },
+	  // returns an object with the tag that implies this is an area, if any
+	  tagSuggestingArea: function tagSuggestingArea() {
+	    return osmTagSuggestingArea(this.tags);
+	  },
+	  isArea: function isArea() {
+	    if (this.tags.area === 'yes') return true;
+	    if (!this.isClosed() || this.tags.area === 'no') return false;
+	    return this.tagSuggestingArea() !== null;
+	  },
+	  isDegenerate: function isDegenerate() {
+	    return new Set(this.nodes).size < (this.isArea() ? 3 : 2);
+	  },
+	  areAdjacent: function areAdjacent(n1, n2) {
+	    for (var i = 0; i < this.nodes.length; i++) {
+	      if (this.nodes[i] === n1) {
+	        if (this.nodes[i - 1] === n2) return true;
+	        if (this.nodes[i + 1] === n2) return true;
+	      }
+	    }
 
-	        if (bkey.length > 32) {
-	          bkey = binb(bkey, key.length * 8);
-	        }
+	    return false;
+	  },
+	  geometry: function geometry(graph) {
+	    return graph["transient"](this, 'geometry', function () {
+	      return this.isArea() ? 'area' : 'line';
+	    });
+	  },
+	  // returns an array of objects representing the segments between the nodes in this way
+	  segments: function segments(graph) {
+	    function segmentExtent(graph) {
+	      var n1 = graph.hasEntity(this.nodes[0]);
+	      var n2 = graph.hasEntity(this.nodes[1]);
+	      return n1 && n2 && geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]);
+	    }
+
+	    return graph["transient"](this, 'segments', function () {
+	      var segments = [];
+
+	      for (var i = 0; i < this.nodes.length - 1; i++) {
+	        segments.push({
+	          id: this.id + '-' + i,
+	          wayId: this.id,
+	          index: i,
+	          nodes: [this.nodes[i], this.nodes[i + 1]],
+	          extent: segmentExtent
+	        });
+	      }
 
-	        for (; i < 32; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	        }
+	      return segments;
+	    });
+	  },
+	  // If this way is not closed, append the beginning node to the end of the nodelist to close it.
+	  close: function close() {
+	    if (this.isClosed() || !this.nodes.length) return this;
+	    var nodes = this.nodes.slice();
+	    nodes = nodes.filter(noRepeatNodes);
+	    nodes.push(nodes[0]);
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
+	  unclose: function unclose() {
+	    if (!this.isClosed()) return this;
+	    var nodes = this.nodes.slice();
+	    var connector = this.first();
+	    var i = nodes.length - 1; // remove trailing connectors..
 
-	        hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
-	        return binb2rstr(binb(opad.concat(hash), 1024 + 512));
-	      }
+	    while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	      nodes.splice(i, 1);
+	      i = nodes.length - 1;
+	    }
 
-	      /**
-	       * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
-	       */
+	    nodes = nodes.filter(noRepeatNodes);
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // Adds a node (id) in front of the node which is currently at position index.
+	  // If index is undefined, the node will be added to the end of the way for linear ways,
+	  //   or just before the final connecting node for circular ways.
+	  // Consecutive duplicates are eliminated including existing ones.
+	  // Circularity is always preserved when adding a node.
+	  addNode: function addNode(id, index) {
+	    var nodes = this.nodes.slice();
+	    var isClosed = this.isClosed();
+	    var max = isClosed ? nodes.length - 1 : nodes.length;
 
-	      function binb(x, len) {
-	        var j, i, l,
-	          W = new Array(80),
-	          hash = new Array(16),
-	          //Initial hash values
-	          H = [
-	            new int64(0x6a09e667, -205731576),
-	            new int64(-1150833019, -2067093701),
-	            new int64(0x3c6ef372, -23791573),
-	            new int64(-1521486534, 0x5f1d36f1),
-	            new int64(0x510e527f, -1377402159),
-	            new int64(-1694144372, 0x2b3e6c1f),
-	            new int64(0x1f83d9ab, -79577749),
-	            new int64(0x5be0cd19, 0x137e2179)
-	          ],
-	          T1 = new int64(0, 0),
-	          T2 = new int64(0, 0),
-	          a = new int64(0, 0),
-	          b = new int64(0, 0),
-	          c = new int64(0, 0),
-	          d = new int64(0, 0),
-	          e = new int64(0, 0),
-	          f = new int64(0, 0),
-	          g = new int64(0, 0),
-	          h = new int64(0, 0),
-	          //Temporary variables not specified by the document
-	          s0 = new int64(0, 0),
-	          s1 = new int64(0, 0),
-	          Ch = new int64(0, 0),
-	          Maj = new int64(0, 0),
-	          r1 = new int64(0, 0),
-	          r2 = new int64(0, 0),
-	          r3 = new int64(0, 0);
-
-	        if (sha512_k === undefined) {
-	          //SHA512 constants
-	          sha512_k = [
-	            new int64(0x428a2f98, -685199838), new int64(0x71374491, 0x23ef65cd),
-	            new int64(-1245643825, -330482897), new int64(-373957723, -2121671748),
-	            new int64(0x3956c25b, -213338824), new int64(0x59f111f1, -1241133031),
-	            new int64(-1841331548, -1357295717), new int64(-1424204075, -630357736),
-	            new int64(-670586216, -1560083902), new int64(0x12835b01, 0x45706fbe),
-	            new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, -704662302),
-	            new int64(0x72be5d74, -226784913), new int64(-2132889090, 0x3b1696b1),
-	            new int64(-1680079193, 0x25c71235), new int64(-1046744716, -815192428),
-	            new int64(-459576895, -1628353838), new int64(-272742522, 0x384f25e3),
-	            new int64(0xfc19dc6, -1953704523), new int64(0x240ca1cc, 0x77ac9c65),
-	            new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483),
-	            new int64(0x5cb0a9dc, -1119749164), new int64(0x76f988da, -2096016459),
-	            new int64(-1740746414, -295247957), new int64(-1473132947, 0x2db43210),
-	            new int64(-1341970488, -1728372417), new int64(-1084653625, -1091629340),
-	            new int64(-958395405, 0x3da88fc2), new int64(-710438585, -1828018395),
-	            new int64(0x6ca6351, -536640913), new int64(0x14292967, 0xa0e6e70),
-	            new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926),
-	            new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, -1651133473),
-	            new int64(0x650a7354, -1951439906), new int64(0x766a0abb, 0x3c77b2a8),
-	            new int64(-2117940946, 0x47edaee6), new int64(-1838011259, 0x1482353b),
-	            new int64(-1564481375, 0x4cf10364), new int64(-1474664885, -1136513023),
-	            new int64(-1035236496, -789014639), new int64(-949202525, 0x654be30),
-	            new int64(-778901479, -688958952), new int64(-694614492, 0x5565a910),
-	            new int64(-200395387, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8),
-	            new int64(0x19a4c116, -1194143544), new int64(0x1e376c08, 0x5141ab53),
-	            new int64(0x2748774c, -544281703), new int64(0x34b0bcb5, -509917016),
-	            new int64(0x391c0cb3, -976659869), new int64(0x4ed8aa4a, -482243893),
-	            new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, -692930397),
-	            new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60),
-	            new int64(-2067236844, -1578062990), new int64(-1933114872, 0x1a6439ec),
-	            new int64(-1866530822, 0x23631e28), new int64(-1538233109, -561857047),
-	            new int64(-1090935817, -1295615723), new int64(-965641998, -479046869),
-	            new int64(-903397682, -366583396), new int64(-779700025, 0x21c0c207),
-	            new int64(-354779690, -840897762), new int64(-176337025, -294727304),
-	            new int64(0x6f067aa, 0x72176fba), new int64(0xa637dc5, -1563912026),
-	            new int64(0x113f9804, -1090974290), new int64(0x1b710b35, 0x131c471b),
-	            new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493),
-	            new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, -1676669620),
-	            new int64(0x4cc5d4be, -885112138), new int64(0x597f299c, -60457430),
-	            new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817)
-	          ];
-	        }
-
-	        for (i = 0; i < 80; i += 1) {
-	          W[i] = new int64(0, 0);
-	        }
-
-	        // append padding to the source string. The format is described in the FIPS.
-	        x[len >> 5] |= 0x80 << (24 - (len & 0x1f));
-	        x[((len + 128 >> 10) << 5) + 31] = len;
-	        l = x.length;
-	        for (i = 0; i < l; i += 32) { //32 dwords is the block size
-	          int64copy(a, H[0]);
-	          int64copy(b, H[1]);
-	          int64copy(c, H[2]);
-	          int64copy(d, H[3]);
-	          int64copy(e, H[4]);
-	          int64copy(f, H[5]);
-	          int64copy(g, H[6]);
-	          int64copy(h, H[7]);
-
-	          for (j = 0; j < 16; j += 1) {
-	            W[j].h = x[i + 2 * j];
-	            W[j].l = x[i + 2 * j + 1];
-	          }
+	    if (index === undefined) {
+	      index = max;
+	    }
 
-	          for (j = 16; j < 80; j += 1) {
-	            //sigma1
-	            int64rrot(r1, W[j - 2], 19);
-	            int64revrrot(r2, W[j - 2], 29);
-	            int64shr(r3, W[j - 2], 6);
-	            s1.l = r1.l ^ r2.l ^ r3.l;
-	            s1.h = r1.h ^ r2.h ^ r3.h;
-	            //sigma0
-	            int64rrot(r1, W[j - 15], 1);
-	            int64rrot(r2, W[j - 15], 8);
-	            int64shr(r3, W[j - 15], 7);
-	            s0.l = r1.l ^ r2.l ^ r3.l;
-	            s0.h = r1.h ^ r2.h ^ r3.h;
-
-	            int64add4(W[j], s1, W[j - 7], s0, W[j - 16]);
-	          }
+	    if (index < 0 || index > max) {
+	      throw new RangeError('index ' + index + ' out of range 0..' + max);
+	    } // If this is a closed way, remove all connector nodes except the first one
+	    // (there may be duplicates) and adjust index if necessary..
 
-	          for (j = 0; j < 80; j += 1) {
-	            //Ch
-	            Ch.l = (e.l & f.l) ^ (~e.l & g.l);
-	            Ch.h = (e.h & f.h) ^ (~e.h & g.h);
-
-	            //Sigma1
-	            int64rrot(r1, e, 14);
-	            int64rrot(r2, e, 18);
-	            int64revrrot(r3, e, 9);
-	            s1.l = r1.l ^ r2.l ^ r3.l;
-	            s1.h = r1.h ^ r2.h ^ r3.h;
-
-	            //Sigma0
-	            int64rrot(r1, a, 28);
-	            int64revrrot(r2, a, 2);
-	            int64revrrot(r3, a, 7);
-	            s0.l = r1.l ^ r2.l ^ r3.l;
-	            s0.h = r1.h ^ r2.h ^ r3.h;
-
-	            //Maj
-	            Maj.l = (a.l & b.l) ^ (a.l & c.l) ^ (b.l & c.l);
-	            Maj.h = (a.h & b.h) ^ (a.h & c.h) ^ (b.h & c.h);
-
-	            int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
-	            int64add(T2, s0, Maj);
-
-	            int64copy(h, g);
-	            int64copy(g, f);
-	            int64copy(f, e);
-	            int64add(e, d, T1);
-	            int64copy(d, c);
-	            int64copy(c, b);
-	            int64copy(b, a);
-	            int64add(a, T1, T2);
-	          }
-	          int64add(H[0], H[0], a);
-	          int64add(H[1], H[1], b);
-	          int64add(H[2], H[2], c);
-	          int64add(H[3], H[3], d);
-	          int64add(H[4], H[4], e);
-	          int64add(H[5], H[5], f);
-	          int64add(H[6], H[6], g);
-	          int64add(H[7], H[7], h);
-	        }
 
-	        //represent the hash as an array of 32-bit dwords
-	        for (i = 0; i < 8; i += 1) {
-	          hash[2 * i] = H[i].h;
-	          hash[2 * i + 1] = H[i].l;
-	        }
-	        return hash;
-	      }
+	    if (isClosed) {
+	      var connector = this.first(); // leading connectors..
 
-	      //A constructor for 64-bit numbers
+	      var i = 1;
 
-	      function int64(h, l) {
-	        this.h = h;
-	        this.l = l;
-	        //this.toString = int64toString;
-	      }
+	      while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	      } // trailing connectors..
 
-	      //Copies src into dst, assuming both are 64-bit numbers
 
-	      function int64copy(dst, src) {
-	        dst.h = src.h;
-	        dst.l = src.l;
+	      i = nodes.length - 1;
+
+	      while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	        i = nodes.length - 1;
 	      }
+	    }
 
-	      //Right-rotates a 64-bit number by shift
-	      //Won't handle cases of shift>=32
-	      //The function revrrot() is for that
+	    nodes.splice(index, 0, id);
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-	      function int64rrot(dst, x, shift) {
-	        dst.l = (x.l >>> shift) | (x.h << (32 - shift));
-	        dst.h = (x.h >>> shift) | (x.l << (32 - shift));
-	      }
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
-	      //Reverses the dwords of the source and then rotates right by shift.
-	      //This is equivalent to rotation by 32+shift
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // Replaces the node which is currently at position index with the given node (id).
+	  // Consecutive duplicates are eliminated including existing ones.
+	  // Circularity is preserved when updating a node.
+	  updateNode: function updateNode(id, index) {
+	    var nodes = this.nodes.slice();
+	    var isClosed = this.isClosed();
+	    var max = nodes.length - 1;
 
-	      function int64revrrot(dst, x, shift) {
-	        dst.l = (x.h >>> shift) | (x.l << (32 - shift));
-	        dst.h = (x.l >>> shift) | (x.h << (32 - shift));
-	      }
+	    if (index === undefined || index < 0 || index > max) {
+	      throw new RangeError('index ' + index + ' out of range 0..' + max);
+	    } // If this is a closed way, remove all connector nodes except the first one
+	    // (there may be duplicates) and adjust index if necessary..
 
-	      //Bitwise-shifts right a 64-bit number by shift
-	      //Won't handle shift>=32, but it's never needed in SHA512
 
-	      function int64shr(dst, x, shift) {
-	        dst.l = (x.l >>> shift) | (x.h << (32 - shift));
-	        dst.h = (x.h >>> shift);
-	      }
+	    if (isClosed) {
+	      var connector = this.first(); // leading connectors..
 
-	      //Adds two 64-bit numbers
-	      //Like the original implementation, does not rely on 32-bit operations
+	      var i = 1;
 
-	      function int64add(dst, x, y) {
-	        var w0 = (x.l & 0xffff) + (y.l & 0xffff);
-	        var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
-	        var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
-	        var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
-	        dst.l = (w0 & 0xffff) | (w1 << 16);
-	        dst.h = (w2 & 0xffff) | (w3 << 16);
-	      }
+	      while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	      } // trailing connectors..
 
-	      //Same, except with 4 addends. Works faster than adding them one by one.
 
-	      function int64add4(dst, a, b, c, d) {
-	        var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
-	        var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
-	        var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
-	        var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
-	        dst.l = (w0 & 0xffff) | (w1 << 16);
-	        dst.h = (w2 & 0xffff) | (w3 << 16);
-	      }
+	      i = nodes.length - 1;
 
-	      //Same, except with 5 addends
+	      while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index === i) index = 0; // update leading connector instead
 
-	      function int64add5(dst, a, b, c, d, e) {
-	        var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff),
-	          w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16),
-	          w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16),
-	          w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
-	        dst.l = (w0 & 0xffff) | (w1 << 16);
-	        dst.h = (w2 & 0xffff) | (w3 << 16);
+	        i = nodes.length - 1;
 	      }
-	    },
-	    /**
-	     * @class Hashes.RMD160
-	     * @constructor
-	     * @param {Object} [config]
-	     *
-	     * A JavaScript implementation of the RIPEMD-160 Algorithm
-	     * Version 2.2 Copyright Jeremy Lin, Paul Johnston 2000 - 2009.
-	     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-	     * See http://pajhome.org.uk/crypt/md5 for details.
-	     * Also http://www.ocf.berkeley.edu/~jjlin/jsotp/
-	     */
-	    RMD160: function(options) {
-	      /**
-	       * Private properties configuration variables. You may need to tweak these to be compatible with
-	       * the server-side, but the defaults work in most cases.
-	       * @see this.setUpperCase() method
-	       * @see this.setPad() method
-	       */
-	      var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false,
-	        /* hexadecimal output case format. false - lowercase; true - uppercase  */
-	        b64pad = (options && typeof options.pad === 'string') ? options.pa : '=',
-	        /* base-64 pad character. Default '=' for strict RFC compliance   */
-	        utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true,
-	        /* enable/disable utf8 encoding */
-	        rmd160_r1 = [
-	          0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
-	          7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
-	          3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
-	          1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
-	          4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
-	        ],
-	        rmd160_r2 = [
-	          5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
-	          6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
-	          15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
-	          8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
-	          12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
-	        ],
-	        rmd160_s1 = [
-	          11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
-	          7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
-	          11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
-	          11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
-	          9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
-	        ],
-	        rmd160_s2 = [
-	          8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
-	          9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
-	          9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
-	          15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
-	          8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
-	        ];
+	    }
 
-	      /* privileged (public) methods */
-	      this.hex = function(s) {
-	        return rstr2hex(rstr(s));
-	      };
-	      this.b64 = function(s) {
-	        return rstr2b64(rstr(s), b64pad);
-	      };
-	      this.any = function(s, e) {
-	        return rstr2any(rstr(s), e);
-	      };
-	      this.raw = function(s) {
-	        return rstr(s);
-	      };
-	      this.hex_hmac = function(k, d) {
-	        return rstr2hex(rstr_hmac(k, d));
-	      };
-	      this.b64_hmac = function(k, d) {
-	        return rstr2b64(rstr_hmac(k, d), b64pad);
-	      };
-	      this.any_hmac = function(k, d, e) {
-	        return rstr2any(rstr_hmac(k, d), e);
-	      };
-	      /**
-	       * Perform a simple self-test to see if the VM is working
-	       * @return {String} Hexadecimal hash sample
-	       * @public
-	       */
-	      this.vm_test = function() {
-	        return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-	      };
-	      /**
-	       * @description Enable/disable uppercase hexadecimal returned string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUpperCase = function(a) {
-	        if (typeof a === 'boolean') {
-	          hexcase = a;
-	        }
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {string} Pad
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setPad = function(a) {
-	        if (typeof a !== 'undefined') {
-	          b64pad = a;
-	        }
-	        return this;
-	      };
-	      /**
-	       * @description Defines a base64 pad string
-	       * @param {boolean}
-	       * @return {Object} this
-	       * @public
-	       */
-	      this.setUTF8 = function(a) {
-	        if (typeof a === 'boolean') {
-	          utf8 = a;
-	        }
-	        return this;
-	      };
+	    nodes.splice(index, 1, id);
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-	      /* private methods */
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
-	      /**
-	       * Calculate the rmd160 of a raw string
-	       */
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // Replaces each occurrence of node id needle with replacement.
+	  // Consecutive duplicates are eliminated including existing ones.
+	  // Circularity is preserved.
+	  replaceNode: function replaceNode(needleID, replacementID) {
+	    var nodes = this.nodes.slice();
+	    var isClosed = this.isClosed();
+
+	    for (var i = 0; i < nodes.length; i++) {
+	      if (nodes[i] === needleID) {
+	        nodes[i] = replacementID;
+	      }
+	    }
+
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binl2rstr(binl(rstr2binl(s), s.length * 8));
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  // Removes each occurrence of node id.
+	  // Consecutive duplicates are eliminated including existing ones.
+	  // Circularity is preserved.
+	  removeNode: function removeNode(id) {
+	    var nodes = this.nodes.slice();
+	    var isClosed = this.isClosed();
+	    nodes = nodes.filter(function (node) {
+	      return node !== id;
+	    }).filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
+
+	    return this.update({
+	      nodes: nodes
+	    });
+	  },
+	  asJXON: function asJXON(changeset_id) {
+	    var r = {
+	      way: {
+	        '@id': this.osmId(),
+	        '@version': this.version || 0,
+	        nd: this.nodes.map(function (id) {
+	          return {
+	            keyAttributes: {
+	              ref: osmEntity.id.toOSM(id)
+	            }
+	          };
+	        }, this),
+	        tag: Object.keys(this.tags).map(function (k) {
+	          return {
+	            keyAttributes: {
+	              k: k,
+	              v: this.tags[k]
+	            }
+	          };
+	        }, this)
 	      }
+	    };
 
-	      /**
-	       * Calculate the HMAC-rmd160 of a key and some data (raw strings)
-	       */
+	    if (changeset_id) {
+	      r.way['@changeset'] = changeset_id;
+	    }
 
-	      function rstr_hmac(key, data) {
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        var i, hash,
-	          bkey = rstr2binl(key),
-	          ipad = Array(16),
-	          opad = Array(16);
+	    return r;
+	  },
+	  asGeoJSON: function asGeoJSON(resolver) {
+	    return resolver["transient"](this, 'GeoJSON', function () {
+	      var coordinates = resolver.childNodes(this).map(function (n) {
+	        return n.loc;
+	      });
 
-	        if (bkey.length > 16) {
-	          bkey = binl(bkey, key.length * 8);
-	        }
+	      if (this.isArea() && this.isClosed()) {
+	        return {
+	          type: 'Polygon',
+	          coordinates: [coordinates]
+	        };
+	      } else {
+	        return {
+	          type: 'LineString',
+	          coordinates: coordinates
+	        };
+	      }
+	    });
+	  },
+	  area: function area(resolver) {
+	    return resolver["transient"](this, 'area', function () {
+	      var nodes = resolver.childNodes(this);
+	      var json = {
+	        type: 'Polygon',
+	        coordinates: [nodes.map(function (n) {
+	          return n.loc;
+	        })]
+	      };
 
-	        for (i = 0; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
-	        }
-	        hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
-	        return binl2rstr(binl(opad.concat(hash), 512 + 160));
+	      if (!this.isClosed() && nodes.length) {
+	        json.coordinates[0].push(nodes[0].loc);
 	      }
 
-	      /**
-	       * Convert an array of little-endian words to a string
-	       */
+	      var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
+	      // that OpenStreetMap polygons are not hemisphere-spanning.
 
-	      function binl2rstr(input) {
-	        var i, output = '',
-	          l = input.length * 32;
-	        for (i = 0; i < l; i += 8) {
-	          output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF);
-	        }
-	        return output;
+	      if (area > 2 * Math.PI) {
+	        json.coordinates[0] = json.coordinates[0].reverse();
+	        area = d3_geoArea(json);
 	      }
 
-	      /**
-	       * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
-	       */
+	      return isNaN(area) ? 0 : area;
+	    });
+	  }
+	}); // Filter function to eliminate consecutive duplicates.
 
-	      function binl(x, len) {
-	        var T, j, i, l,
-	          h0 = 0x67452301,
-	          h1 = 0xefcdab89,
-	          h2 = 0x98badcfe,
-	          h3 = 0x10325476,
-	          h4 = 0xc3d2e1f0,
-	          A1, B1, C1, D1, E1,
-	          A2, B2, C2, D2, E2;
-
-	        /* append padding */
-	        x[len >> 5] |= 0x80 << (len % 32);
-	        x[(((len + 64) >>> 9) << 4) + 14] = len;
-	        l = x.length;
-
-	        for (i = 0; i < l; i += 16) {
-	          A1 = A2 = h0;
-	          B1 = B2 = h1;
-	          C1 = C2 = h2;
-	          D1 = D2 = h3;
-	          E1 = E2 = h4;
-	          for (j = 0; j <= 79; j += 1) {
-	            T = safe_add(A1, rmd160_f(j, B1, C1, D1));
-	            T = safe_add(T, x[i + rmd160_r1[j]]);
-	            T = safe_add(T, rmd160_K1(j));
-	            T = safe_add(bit_rol(T, rmd160_s1[j]), E1);
-	            A1 = E1;
-	            E1 = D1;
-	            D1 = bit_rol(C1, 10);
-	            C1 = B1;
-	            B1 = T;
-	            T = safe_add(A2, rmd160_f(79 - j, B2, C2, D2));
-	            T = safe_add(T, x[i + rmd160_r2[j]]);
-	            T = safe_add(T, rmd160_K2(j));
-	            T = safe_add(bit_rol(T, rmd160_s2[j]), E2);
-	            A2 = E2;
-	            E2 = D2;
-	            D2 = bit_rol(C2, 10);
-	            C2 = B2;
-	            B2 = T;
-	          }
+	function noRepeatNodes(node, i, arr) {
+	  return i === 0 || node !== arr[i - 1];
+	}
 
-	          T = safe_add(h1, safe_add(C1, D2));
-	          h1 = safe_add(h2, safe_add(D1, E2));
-	          h2 = safe_add(h3, safe_add(E1, A2));
-	          h3 = safe_add(h4, safe_add(A1, B2));
-	          h4 = safe_add(h0, safe_add(B1, C2));
-	          h0 = T;
-	        }
-	        return [h0, h1, h2, h3, h4];
-	      }
+	//
+	// 1. Relation tagged with `type=multipolygon` and no interesting tags.
+	// 2. One and only one member with the `outer` role. Must be a way with interesting tags.
+	// 3. No members without a role.
+	//
+	// Old multipolygons are no longer recommended but are still rendered as areas by iD.
 
-	      // specific algorithm methods
+	function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
+	  if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
+	    return false;
+	  }
 
-	      function rmd160_f(j, x, y, z) {
-	        return (0 <= j && j <= 15) ? (x ^ y ^ z) :
-	          (16 <= j && j <= 31) ? (x & y) | (~x & z) :
-	          (32 <= j && j <= 47) ? (x | ~y) ^ z :
-	          (48 <= j && j <= 63) ? (x & z) | (y & ~z) :
-	          (64 <= j && j <= 79) ? x ^ (y | ~z) :
-	          'rmd160_f: j out of range';
-	      }
+	  var outerMember;
 
-	      function rmd160_K1(j) {
-	        return (0 <= j && j <= 15) ? 0x00000000 :
-	          (16 <= j && j <= 31) ? 0x5a827999 :
-	          (32 <= j && j <= 47) ? 0x6ed9eba1 :
-	          (48 <= j && j <= 63) ? 0x8f1bbcdc :
-	          (64 <= j && j <= 79) ? 0xa953fd4e :
-	          'rmd160_K1: j out of range';
-	      }
+	  for (var memberIndex in entity.members) {
+	    var member = entity.members[memberIndex];
 
-	      function rmd160_K2(j) {
-	        return (0 <= j && j <= 15) ? 0x50a28be6 :
-	          (16 <= j && j <= 31) ? 0x5c4dd124 :
-	          (32 <= j && j <= 47) ? 0x6d703ef3 :
-	          (48 <= j && j <= 63) ? 0x7a6d76e9 :
-	          (64 <= j && j <= 79) ? 0x00000000 :
-	          'rmd160_K2: j out of range';
-	      }
-	    }
-	  };
+	    if (!member.role || member.role === 'outer') {
+	      if (outerMember) return false;
+	      if (member.type !== 'way') return false;
+	      if (!graph.hasEntity(member.id)) return false;
+	      outerMember = graph.entity(member.id);
 
-	  // exposes Hashes
-	  (function(window, undefined$1) {
-	    var freeExports = false;
-	    {
-	      freeExports = exports;
-	      if (exports && typeof commonjsGlobal === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
-	        window = commonjsGlobal;
+	      if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
+	        return false;
 	      }
 	    }
+	  }
 
-	    if (typeof undefined$1 === 'function' && typeof undefined$1.amd === 'object' && undefined$1.amd) {
-	      // define as an anonymous module, so, through path mapping, it can be aliased
-	      undefined$1(function() {
-	        return Hashes;
-	      });
-	    } else if (freeExports) {
-	      // in Node.js or RingoJS v0.8.0+
-	      if ( module && module.exports === freeExports) {
-	        module.exports = Hashes;
-	      }
-	      // in Narwhal or RingoJS v0.7.0-
-	      else {
-	        freeExports.Hashes = Hashes;
-	      }
-	    } else {
-	      // in a browser or Rhino
-	      window.Hashes = Hashes;
-	    }
-	  }(this));
-	}()); // IIFE
-	});
+	  return outerMember;
+	} // For fixing up rendering of multipolygons with tags on the outer member.
+	// https://github.com/openstreetmap/iD/issues/613
 
-	var immutable = extend$2;
+	function osmIsOldMultipolygonOuterMember(entity, graph) {
+	  if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0) return false;
+	  var parents = graph.parentRelations(entity);
+	  if (parents.length !== 1) return false;
+	  var parent = parents[0];
+	  if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) return false;
+	  var members = parent.members,
+	      member;
 
-	var hasOwnProperty$3 = Object.prototype.hasOwnProperty;
+	  for (var i = 0; i < members.length; i++) {
+	    member = members[i];
+	    if (member.id === entity.id && member.role && member.role !== 'outer') return false; // Not outer member
 
-	function extend$2() {
-	    var arguments$1 = arguments;
+	    if (member.id !== entity.id && (!member.role || member.role === 'outer')) return false; // Not a simple multipolygon
+	  }
 
-	    var target = {};
+	  return parent;
+	}
+	function osmOldMultipolygonOuterMember(entity, graph) {
+	  if (entity.type !== 'way') return false;
+	  var parents = graph.parentRelations(entity);
+	  if (parents.length !== 1) return false;
+	  var parent = parents[0];
+	  if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) return false;
+	  var members = parent.members,
+	      member,
+	      outerMember;
 
-	    for (var i = 0; i < arguments.length; i++) {
-	        var source = arguments$1[i];
+	  for (var i = 0; i < members.length; i++) {
+	    member = members[i];
 
-	        for (var key in source) {
-	            if (hasOwnProperty$3.call(source, key)) {
-	                target[key] = source[key];
-	            }
-	        }
-	    }
+	    if (!member.role || member.role === 'outer') {
+	      if (outerMember) return false; // Not a simple multipolygon
 
-	    return target
-	}
+	      outerMember = member;
+	    }
+	  }
 
-	var sha1 = new hashes.SHA1();
+	  if (!outerMember) return false;
+	  var outerEntity = graph.hasEntity(outerMember.id);
+	  if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length) return false;
+	  return outerEntity;
+	} // Join `toJoin` array into sequences of connecting ways.
+	// Segments which share identical start/end nodes will, as much as possible,
+	// be connected with each other.
+	//
+	// The return value is a nested array. Each constituent array contains elements
+	// of `toJoin` which have been determined to connect.
+	//
+	// Each consitituent array also has a `nodes` property whose value is an
+	// ordered array of member nodes, with appropriate order reversal and
+	// start/end coordinate de-duplication.
+	//
+	// Members of `toJoin` must have, at minimum, `type` and `id` properties.
+	// Thus either an array of `osmWay`s or a relation member array may be used.
+	//
+	// If an member is an `osmWay`, its tags and childnodes may be reversed via
+	// `actionReverse` in the output.
+	//
+	// The returned sequences array also has an `actions` array property, containing
+	// any reversal actions that should be applied to the graph, should the calling
+	// code attempt to actually join the given ways.
+	//
+	// Incomplete members (those for which `graph.hasEntity(element.id)` returns
+	// false) and non-way members are ignored.
+	//
 
-	var ohauth = {};
+	function osmJoinWays(toJoin, graph) {
+	  function resolve(member) {
+	    return graph.childNodes(graph.entity(member.id));
+	  }
 
-	ohauth.qsString = function(obj) {
-	    return Object.keys(obj).sort().map(function(key) {
-	        return ohauth.percentEncode(key) + '=' +
-	            ohauth.percentEncode(obj[key]);
-	    }).join('&');
-	};
+	  function reverse(item) {
+	    var action = actionReverse(item.id, {
+	      reverseOneway: true
+	    });
+	    sequences.actions.push(action);
+	    return item instanceof osmWay ? action(graph).entity(item.id) : item;
+	  } // make a copy containing only the items to join
 
-	ohauth.stringQs = function(str) {
-	    return str.split('&').filter(function (pair) {
-	        return pair !== '';
-	    }).reduce(function(obj, pair){
-	        var parts = pair.split('=');
-	        obj[decodeURIComponent(parts[0])] = (null === parts[1]) ?
-	            '' : decodeURIComponent(parts[1]);
-	        return obj;
-	    }, {});
-	};
 
-	ohauth.rawxhr = function(method, url, data, headers, callback) {
-	    var xhr = new XMLHttpRequest(),
-	        twoHundred = /^20\d$/;
-	    xhr.onreadystatechange = function() {
-	        if (4 === xhr.readyState && 0 !== xhr.status) {
-	            if (twoHundred.test(xhr.status)) { callback(null, xhr); }
-	            else { return callback(xhr, null); }
-	        }
-	    };
-	    xhr.onerror = function(e) { return callback(e, null); };
-	    xhr.open(method, url, true);
-	    for (var h in headers) { xhr.setRequestHeader(h, headers[h]); }
-	    xhr.send(data);
-	    return xhr;
-	};
+	  toJoin = toJoin.filter(function (member) {
+	    return member.type === 'way' && graph.hasEntity(member.id);
+	  }); // Are the things we are joining relation members or `osmWays`?
+	  // If `osmWays`, skip the "prefer a forward path" code below (see #4872)
 
-	ohauth.xhr = function(method, url, auth, data, options, callback) {
-	    var headers = (options && options.header) || {
-	        'Content-Type': 'application/x-www-form-urlencoded'
-	    };
-	    headers.Authorization = 'OAuth ' + ohauth.authHeader(auth);
-	    return ohauth.rawxhr(method, url, data, headers, callback);
-	};
+	  var i;
+	  var joinAsMembers = true;
 
-	ohauth.nonce = function() {
-	    for (var o = ''; o.length < 6;) {
-	        o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
+	  for (i = 0; i < toJoin.length; i++) {
+	    if (toJoin[i] instanceof osmWay) {
+	      joinAsMembers = false;
+	      break;
 	    }
-	    return o;
-	};
-
-	ohauth.authHeader = function(obj) {
-	    return Object.keys(obj).sort().map(function(key) {
-	        return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
-	    }).join(', ');
-	};
-
-	ohauth.timestamp = function() { return ~~((+new Date()) / 1000); };
+	  }
 
-	ohauth.percentEncode = function(s) {
-	    return encodeURIComponent(s)
-	        .replace(/\!/g, '%21').replace(/\'/g, '%27')
-	        .replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
-	};
+	  var sequences = [];
+	  sequences.actions = [];
 
-	ohauth.baseString = function(method, url, params) {
-	    if (params.oauth_signature) { delete params.oauth_signature; }
-	    return [
-	        method,
-	        ohauth.percentEncode(url),
-	        ohauth.percentEncode(ohauth.qsString(params))].join('&');
-	};
+	  while (toJoin.length) {
+	    // start a new sequence
+	    var item = toJoin.shift();
+	    var currWays = [item];
+	    var currNodes = resolve(item).slice(); // add to it
 
-	ohauth.signature = function(oauth_secret, token_secret, baseString) {
-	    return sha1.b64_hmac(
-	        ohauth.percentEncode(oauth_secret) + '&' +
-	        ohauth.percentEncode(token_secret),
-	        baseString);
-	};
+	    while (toJoin.length) {
+	      var start = currNodes[0];
+	      var end = currNodes[currNodes.length - 1];
+	      var fn = null;
+	      var nodes = null; // Find the next way/member to join.
+
+	      for (i = 0; i < toJoin.length; i++) {
+	        item = toJoin[i];
+	        nodes = resolve(item); // (for member ordering only, not way ordering - see #4872)
+	        // Strongly prefer to generate a forward path that preserves the order
+	        // of the members array. For multipolygons and most relations, member
+	        // order does not matter - but for routes, it does. (see #4589)
+	        // If we started this sequence backwards (i.e. next member way attaches to
+	        // the start node and not the end node), reverse the initial way before continuing.
+
+	        if (joinAsMembers && currWays.length === 1 && nodes[0] !== end && nodes[nodes.length - 1] !== end && (nodes[nodes.length - 1] === start || nodes[0] === start)) {
+	          currWays[0] = reverse(currWays[0]);
+	          currNodes.reverse();
+	          start = currNodes[0];
+	          end = currNodes[currNodes.length - 1];
+	        }
+
+	        if (nodes[0] === end) {
+	          fn = currNodes.push; // join to end
+
+	          nodes = nodes.slice(1);
+	          break;
+	        } else if (nodes[nodes.length - 1] === end) {
+	          fn = currNodes.push; // join to end
 
-	/**
-	 * Takes an options object for configuration (consumer_key,
-	 * consumer_secret, version, signature_method, token, token_secret)
-	 * and returns a function that generates the Authorization header
-	 * for given data.
-	 *
-	 * The returned function takes these parameters:
-	 * - method: GET/POST/...
-	 * - uri: full URI with protocol, port, path and query string
-	 * - extra_params: any extra parameters (that are passed in the POST data),
-	 *   can be an object or a from-urlencoded string.
-	 *
-	 * Returned function returns full OAuth header with "OAuth" string in it.
-	 */
+	          nodes = nodes.slice(0, -1).reverse();
+	          item = reverse(item);
+	          break;
+	        } else if (nodes[nodes.length - 1] === start) {
+	          fn = currNodes.unshift; // join to beginning
 
-	ohauth.headerGenerator = function(options) {
-	    options = options || {};
-	    var consumer_key = options.consumer_key || '',
-	        consumer_secret = options.consumer_secret || '',
-	        signature_method = options.signature_method || 'HMAC-SHA1',
-	        version = options.version || '1.0',
-	        token = options.token || '',
-	        token_secret = options.token_secret || '';
+	          nodes = nodes.slice(0, -1);
+	          break;
+	        } else if (nodes[0] === start) {
+	          fn = currNodes.unshift; // join to beginning
 
-	    return function(method, uri, extra_params) {
-	        method = method.toUpperCase();
-	        if (typeof extra_params === 'string' && extra_params.length > 0) {
-	            extra_params = ohauth.stringQs(extra_params);
+	          nodes = nodes.slice(1).reverse();
+	          item = reverse(item);
+	          break;
+	        } else {
+	          fn = nodes = null;
 	        }
+	      }
 
-	        var uri_parts = uri.split('?', 2),
-	        base_uri = uri_parts[0];
+	      if (!nodes) {
+	        // couldn't find a joinable way/member
+	        break;
+	      }
 
-	        var query_params = uri_parts.length === 2 ?
-	            ohauth.stringQs(uri_parts[1]) : {};
+	      fn.apply(currWays, [item]);
+	      fn.apply(currNodes, nodes);
+	      toJoin.splice(i, 1);
+	    }
 
-	        var oauth_params = {
-	            oauth_consumer_key: consumer_key,
-	            oauth_signature_method: signature_method,
-	            oauth_version: version,
-	            oauth_timestamp: ohauth.timestamp(),
-	            oauth_nonce: ohauth.nonce()
-	        };
+	    currWays.nodes = currNodes;
+	    sequences.push(currWays);
+	  }
 
-	        if (token) { oauth_params.oauth_token = token; }
+	  return sequences;
+	}
 
-	        var all_params = immutable({}, oauth_params, query_params, extra_params),
-	            base_str = ohauth.baseString(method, base_uri, all_params);
+	function actionAddMember(relationId, member, memberIndex, insertPair) {
+	  return function action(graph) {
+	    var relation = graph.entity(relationId); // There are some special rules for Public Transport v2 routes.
 
-	        oauth_params.oauth_signature = ohauth.signature(consumer_secret, token_secret, base_str);
+	    var isPTv2 = /stop|platform/.test(member.role);
 
-	        return 'OAuth ' + ohauth.authHeader(oauth_params);
-	    };
-	};
+	    if ((isNaN(memberIndex) || insertPair) && member.type === 'way' && !isPTv2) {
+	      // Try to perform sensible inserts based on how the ways join together
+	      graph = addWayMember(relation, graph);
+	    } else {
+	      // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
+	      // Stops and Platforms for PTv2 should be ordered first.
+	      // hack: We do not currently have the ability to place them in the exactly correct order.
+	      if (isPTv2 && isNaN(memberIndex)) {
+	        memberIndex = 0;
+	      }
 
-	var ohauth_1 = ohauth;
+	      graph = graph.replace(relation.addMember(member, memberIndex));
+	    }
 
-	var resolveUrl$1 = createCommonjsModule(function (module, exports) {
-	// Copyright 2014 Simon Lydell
-	// X11 (“MIT”) Licensed. (See LICENSE.)
+	    return graph;
+	  }; // Add a way member into the relation "wherever it makes sense".
+	  // In this situation we were not supplied a memberIndex.
 
-	void (function(root, factory) {
-	  {
-	    module.exports = factory();
-	  }
-	}(commonjsGlobal, function() {
+	  function addWayMember(relation, graph) {
+	    var groups, tempWay, item, i, j, k; // remove PTv2 stops and platforms before doing anything.
 
-	  function resolveUrl(/* ...urls */) {
-	    var arguments$1 = arguments;
+	    var PTv2members = [];
+	    var members = [];
 
-	    var numUrls = arguments.length;
+	    for (i = 0; i < relation.members.length; i++) {
+	      var m = relation.members[i];
 
-	    if (numUrls === 0) {
-	      throw new Error("resolveUrl requires at least one argument; got none.")
+	      if (/stop|platform/.test(m.role)) {
+	        PTv2members.push(m);
+	      } else {
+	        members.push(m);
+	      }
 	    }
 
-	    var base = document.createElement("base");
-	    base.href = arguments[0];
+	    relation = relation.update({
+	      members: members
+	    });
 
-	    if (numUrls === 1) {
-	      return base.href
+	    if (insertPair) {
+	      // We're adding a member that must stay paired with an existing member.
+	      // (This feature is used by `actionSplit`)
+	      //
+	      // This is tricky because the members may exist multiple times in the
+	      // member list, and with different A-B/B-A ordering and different roles.
+	      // (e.g. a bus route that loops out and back - #4589).
+	      //
+	      // Replace the existing member with a temporary way,
+	      // so that `osmJoinWays` can treat the pair like a single way.
+	      tempWay = osmWay({
+	        id: 'wTemp',
+	        nodes: insertPair.nodes
+	      });
+	      graph = graph.replace(tempWay);
+	      var tempMember = {
+	        id: tempWay.id,
+	        type: 'way',
+	        role: member.role
+	      };
+	      var tempRelation = relation.replaceMember({
+	        id: insertPair.originalID
+	      }, tempMember, true);
+	      groups = utilArrayGroupBy(tempRelation.members, 'type');
+	      groups.way = groups.way || [];
+	    } else {
+	      // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
+	      groups = utilArrayGroupBy(relation.members, 'type');
+	      groups.way = groups.way || [];
+	      groups.way.push(member);
 	    }
 
-	    var head = document.getElementsByTagName("head")[0];
-	    head.insertBefore(base, head.firstChild);
+	    members = withIndex(groups.way);
+	    var joined = osmJoinWays(members, graph); // `joined` might not contain all of the way members,
+	    // But will contain only the completed (downloaded) members
 
-	    var a = document.createElement("a");
-	    var resolved;
+	    for (i = 0; i < joined.length; i++) {
+	      var segment = joined[i];
+	      var nodes = segment.nodes.slice();
+	      var startIndex = segment[0].index; // j = array index in `members` where this segment starts
 
-	    for (var index = 1; index < numUrls; index++) {
-	      a.href = arguments$1[index];
-	      resolved = a.href;
-	      base.href = resolved;
-	    }
-
-	    head.removeChild(base);
+	      for (j = 0; j < members.length; j++) {
+	        if (members[j].index === startIndex) {
+	          break;
+	        }
+	      } // k = each member in segment
 
-	    return resolved
-	  }
 
-	  return resolveUrl
+	      for (k = 0; k < segment.length; k++) {
+	        item = segment[k];
+	        var way = graph.entity(item.id); // If this is a paired item, generate members in correct order and role
 
-	}));
-	});
+	        if (tempWay && item.id === tempWay.id) {
+	          if (nodes[0].id === insertPair.nodes[0]) {
+	            item.pair = [{
+	              id: insertPair.originalID,
+	              type: 'way',
+	              role: item.role
+	            }, {
+	              id: insertPair.insertedID,
+	              type: 'way',
+	              role: item.role
+	            }];
+	          } else {
+	            item.pair = [{
+	              id: insertPair.insertedID,
+	              type: 'way',
+	              role: item.role
+	            }, {
+	              id: insertPair.originalID,
+	              type: 'way',
+	              role: item.role
+	            }];
+	          }
+	        } // reorder `members` if necessary
 
-	var assign$1 = make_assign();
-	var create$8 = make_create();
-	var trim = make_trim();
-	var Global = (typeof window !== 'undefined' ? window : commonjsGlobal);
 
-	var util = {
-		assign: assign$1,
-		create: create$8,
-		trim: trim,
-		bind: bind$3,
-		slice: slice$5,
-		each: each,
-		map: map$5,
-		pluck: pluck,
-		isList: isList,
-		isFunction: isFunction$2,
-		isObject: isObject$2,
-		Global: Global
-	};
+	        if (k > 0) {
+	          if (j + k >= members.length || item.index !== members[j + k].index) {
+	            moveMember(members, item.index, j + k);
+	          }
+	        }
 
-	function make_assign() {
-		if (Object.assign) {
-			return Object.assign
-		} else {
-			return function shimAssign(obj, props1, props2, etc) {
-				var arguments$1 = arguments;
-
-				for (var i = 1; i < arguments.length; i++) {
-					each(Object(arguments$1[i]), function(val, key) {
-						obj[key] = val;
-					});
-				}			
-				return obj
-			}
-		}
-	}
+	        nodes.splice(0, way.nodes.length - 1);
+	      }
+	    }
 
-	function make_create() {
-		if (Object.create) {
-			return function create(obj, assignProps1, assignProps2, etc) {
-				var assignArgsList = slice$5(arguments, 1);
-				return assign$1.apply(this, [Object.create(obj)].concat(assignArgsList))
-			}
-		} else {
-			function F() {} // eslint-disable-line no-inner-declarations
-			return function create(obj, assignProps1, assignProps2, etc) {
-				var assignArgsList = slice$5(arguments, 1);
-				F.prototype = obj;
-				return assign$1.apply(this, [new F()].concat(assignArgsList))
-			}
-		}
-	}
+	    if (tempWay) {
+	      graph = graph.remove(tempWay);
+	    } // Final pass: skip dead items, split pairs, remove index properties
 
-	function make_trim() {
-		if (String.prototype.trim) {
-			return function trim(str) {
-				return String.prototype.trim.call(str)
-			}
-		} else {
-			return function trim(str) {
-				return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '')
-			}
-		}
-	}
 
-	function bind$3(obj, fn) {
-		return function() {
-			return fn.apply(obj, Array.prototype.slice.call(arguments, 0))
-		}
-	}
+	    var wayMembers = [];
 
-	function slice$5(arr, index) {
-		return Array.prototype.slice.call(arr, index || 0)
-	}
+	    for (i = 0; i < members.length; i++) {
+	      item = members[i];
+	      if (item.index === -1) continue;
 
-	function each(obj, fn) {
-		pluck(obj, function(val, key) {
-			fn(val, key);
-			return false
-		});
-	}
+	      if (item.pair) {
+	        wayMembers.push(item.pair[0]);
+	        wayMembers.push(item.pair[1]);
+	      } else {
+	        wayMembers.push(utilObjectOmit(item, ['index']));
+	      }
+	    } // Put stops and platforms first, then nodes, ways, relations
+	    // This is recommended for Public Transport v2 routes:
+	    // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
 
-	function map$5(obj, fn) {
-		var res = (isList(obj) ? [] : {});
-		pluck(obj, function(v, k) {
-			res[k] = fn(v, k);
-			return false
-		});
-		return res
-	}
 
-	function pluck(obj, fn) {
-		if (isList(obj)) {
-			for (var i=0; i<obj.length; i++) {
-				if (fn(obj[i], i)) {
-					return obj[i]
-				}
-			}
-		} else {
-			for (var key in obj) {
-				if (obj.hasOwnProperty(key)) {
-					if (fn(obj[key], key)) {
-						return obj[key]
-					}
-				}
-			}
-		}
-	}
+	    var newMembers = PTv2members.concat(groups.node || [], wayMembers, groups.relation || []);
+	    return graph.replace(relation.update({
+	      members: newMembers
+	    })); // `moveMember()` changes the `members` array in place by splicing
+	    // the item with `.index = findIndex` to where it belongs,
+	    // and marking the old position as "dead" with `.index = -1`
+	    //
+	    // j=5, k=0                jk
+	    // segment                 5 4 7 6
+	    // members       0 1 2 3 4 5 6 7 8 9        keep 5 in j+k
+	    //
+	    // j=5, k=1                j k
+	    // segment                 5 4 7 6
+	    // members       0 1 2 3 4 5 6 7 8 9        move 4 to j+k
+	    // members       0 1 2 3 x 5 4 6 7 8 9      moved
+	    //
+	    // j=5, k=2                j   k
+	    // segment                 5 4 7 6
+	    // members       0 1 2 3 x 5 4 6 7 8 9      move 7 to j+k
+	    // members       0 1 2 3 x 5 4 7 6 x 8 9    moved
+	    //
+	    // j=5, k=3                j     k
+	    // segment                 5 4 7 6
+	    // members       0 1 2 3 x 5 4 7 6 x 8 9    keep 6 in j+k
+	    //
 
-	function isList(val) {
-		return (val != null && typeof val != 'function' && typeof val.length == 'number')
-	}
+	    function moveMember(arr, findIndex, toIndex) {
+	      var i;
 
-	function isFunction$2(val) {
-		return val && {}.toString.call(val) === '[object Function]'
-	}
+	      for (i = 0; i < arr.length; i++) {
+	        if (arr[i].index === findIndex) {
+	          break;
+	        }
+	      }
 
-	function isObject$2(val) {
-		return val && {}.toString.call(val) === '[object Object]'
-	}
+	      var item = Object.assign({}, arr[i]); // shallow copy
 
-	var slice$6 = util.slice;
-	var pluck$1 = util.pluck;
-	var each$1 = util.each;
-	var bind$4 = util.bind;
-	var create$9 = util.create;
-	var isList$1 = util.isList;
-	var isFunction$3 = util.isFunction;
-	var isObject$3 = util.isObject;
+	      arr[i].index = -1; // mark as dead
 
-	var storeEngine = {
-		createStore: createStore
-	};
+	      item.index = toIndex;
+	      arr.splice(toIndex, 0, item);
+	    } // This is the same as `Relation.indexedMembers`,
+	    // Except we don't want to index all the members, only the ways
 
-	var storeAPI = {
-		version: '2.0.12',
-		enabled: false,
-		
-		// get returns the value of the given key. If that value
-		// is undefined, it returns optionalDefaultValue instead.
-		get: function(key, optionalDefaultValue) {
-			var data = this.storage.read(this._namespacePrefix + key);
-			return this._deserialize(data, optionalDefaultValue)
-		},
-
-		// set will store the given value at key and returns value.
-		// Calling set with value === undefined is equivalent to calling remove.
-		set: function(key, value) {
-			if (value === undefined) {
-				return this.remove(key)
-			}
-			this.storage.write(this._namespacePrefix + key, this._serialize(value));
-			return value
-		},
-
-		// remove deletes the key and value stored at the given key.
-		remove: function(key) {
-			this.storage.remove(this._namespacePrefix + key);
-		},
-
-		// each will call the given callback once for each key-value pair
-		// in this store.
-		each: function(callback) {
-			var self = this;
-			this.storage.each(function(val, namespacedKey) {
-				callback.call(self, self._deserialize(val), (namespacedKey || '').replace(self._namespaceRegexp, ''));
-			});
-		},
-
-		// clearAll will remove all the stored key-value pairs in this store.
-		clearAll: function() {
-			this.storage.clearAll();
-		},
-
-		// additional functionality that can't live in plugins
-		// ---------------------------------------------------
-
-		// hasNamespace returns true if this store instance has the given namespace.
-		hasNamespace: function(namespace) {
-			return (this._namespacePrefix == '__storejs_'+namespace+'_')
-		},
-
-		// createStore creates a store.js instance with the first
-		// functioning storage in the list of storage candidates,
-		// and applies the the given mixins to the instance.
-		createStore: function() {
-			return createStore.apply(this, arguments)
-		},
-		
-		addPlugin: function(plugin) {
-			this._addPlugin(plugin);
-		},
-		
-		namespace: function(namespace) {
-			return createStore(this.storage, this.plugins, namespace)
-		}
-	};
 
-	function _warn() {
-		var _console = (typeof console == 'undefined' ? null : console);
-		if (!_console) { return }
-		var fn = (_console.warn ? _console.warn : _console.log);
-		fn.apply(_console, arguments);
-	}
-
-	function createStore(storages, plugins, namespace) {
-		if (!namespace) {
-			namespace = '';
-		}
-		if (storages && !isList$1(storages)) {
-			storages = [storages];
-		}
-		if (plugins && !isList$1(plugins)) {
-			plugins = [plugins];
-		}
-
-		var namespacePrefix = (namespace ? '__storejs_'+namespace+'_' : '');
-		var namespaceRegexp = (namespace ? new RegExp('^'+namespacePrefix) : null);
-		var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
-		if (!legalNamespaces.test(namespace)) {
-			throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes')
-		}
-		
-		var _privateStoreProps = {
-			_namespacePrefix: namespacePrefix,
-			_namespaceRegexp: namespaceRegexp,
-
-			_testStorage: function(storage) {
-				try {
-					var testStr = '__storejs__test__';
-					storage.write(testStr, testStr);
-					var ok = (storage.read(testStr) === testStr);
-					storage.remove(testStr);
-					return ok
-				} catch(e) {
-					return false
-				}
-			},
-
-			_assignPluginFnProp: function(pluginFnProp, propName) {
-				var oldFn = this[propName];
-				this[propName] = function pluginFn() {
-					var args = slice$6(arguments, 0);
-					var self = this;
-
-					// super_fn calls the old function which was overwritten by
-					// this mixin.
-					function super_fn() {
-						if (!oldFn) { return }
-						each$1(arguments, function(arg, i) {
-							args[i] = arg;
-						});
-						return oldFn.apply(self, args)
-					}
-
-					// Give mixing function access to super_fn by prefixing all mixin function
-					// arguments with super_fn.
-					var newFnArgs = [super_fn].concat(args);
-
-					return pluginFnProp.apply(self, newFnArgs)
-				};
-			},
-
-			_serialize: function(obj) {
-				return JSON.stringify(obj)
-			},
-
-			_deserialize: function(strVal, defaultVal) {
-				if (!strVal) { return defaultVal }
-				// It is possible that a raw string value has been previously stored
-				// in a storage without using store.js, meaning it will be a raw
-				// string value instead of a JSON serialized string. By defaulting
-				// to the raw string value in case of a JSON parse error, we allow
-				// for past stored values to be forwards-compatible with store.js
-				var val = '';
-				try { val = JSON.parse(strVal); }
-				catch(e) { val = strVal; }
-
-				return (val !== undefined ? val : defaultVal)
-			},
-			
-			_addStorage: function(storage) {
-				if (this.enabled) { return }
-				if (this._testStorage(storage)) {
-					this.storage = storage;
-					this.enabled = true;
-				}
-			},
-
-			_addPlugin: function(plugin) {
-				var self = this;
-
-				// If the plugin is an array, then add all plugins in the array.
-				// This allows for a plugin to depend on other plugins.
-				if (isList$1(plugin)) {
-					each$1(plugin, function(plugin) {
-						self._addPlugin(plugin);
-					});
-					return
-				}
-
-				// Keep track of all plugins we've seen so far, so that we
-				// don't add any of them twice.
-				var seenPlugin = pluck$1(this.plugins, function(seenPlugin) {
-					return (plugin === seenPlugin)
-				});
-				if (seenPlugin) {
-					return
-				}
-				this.plugins.push(plugin);
-
-				// Check that the plugin is properly formed
-				if (!isFunction$3(plugin)) {
-					throw new Error('Plugins must be function values that return objects')
-				}
-
-				var pluginProperties = plugin.call(this);
-				if (!isObject$3(pluginProperties)) {
-					throw new Error('Plugins must return an object of function properties')
-				}
-
-				// Add the plugin function properties to this store instance.
-				each$1(pluginProperties, function(pluginFnProp, propName) {
-					if (!isFunction$3(pluginFnProp)) {
-						throw new Error('Bad plugin property: '+propName+' from plugin '+plugin.name+'. Plugins should only return functions.')
-					}
-					self._assignPluginFnProp(pluginFnProp, propName);
-				});
-			},
-			
-			// Put deprecated properties in the private API, so as to not expose it to accidential
-			// discovery through inspection of the store object.
-			
-			// Deprecated: addStorage
-			addStorage: function(storage) {
-				_warn('store.addStorage(storage) is deprecated. Use createStore([storages])');
-				this._addStorage(storage);
-			}
-		};
-
-		var store = create$9(_privateStoreProps, storeAPI, {
-			plugins: []
-		});
-		store.raw = {};
-		each$1(store, function(prop, propName) {
-			if (isFunction$3(prop)) {
-				store.raw[propName] = bind$4(store, prop);			
-			}
-		});
-		each$1(storages, function(storage) {
-			store._addStorage(storage);
-		});
-		each$1(plugins, function(plugin) {
-			store._addPlugin(plugin);
-		});
-		return store
-	}
+	    function withIndex(arr) {
+	      var result = new Array(arr.length);
 
-	var Global$1 = util.Global;
+	      for (var i = 0; i < arr.length; i++) {
+	        result[i] = Object.assign({}, arr[i]); // shallow copy
 
-	var localStorage_1 = {
-		name: 'localStorage',
-		read: read,
-		write: write,
-		each: each$2,
-		remove: remove$2,
-		clearAll: clearAll,
-	};
+	        result[i].index = i;
+	      }
 
-	function localStorage$1() {
-		return Global$1.localStorage
+	      return result;
+	    }
+	  }
 	}
 
-	function read(key) {
-		return localStorage$1().getItem(key)
-	}
+	function actionAddMidpoint(midpoint, node) {
+	  return function (graph) {
+	    graph = graph.replace(node.move(midpoint.loc));
+	    var parents = utilArrayIntersection(graph.parentWays(graph.entity(midpoint.edge[0])), graph.parentWays(graph.entity(midpoint.edge[1])));
+	    parents.forEach(function (way) {
+	      for (var i = 0; i < way.nodes.length - 1; i++) {
+	        if (geoEdgeEqual([way.nodes[i], way.nodes[i + 1]], midpoint.edge)) {
+	          graph = graph.replace(graph.entity(way.id).addNode(node.id, i + 1)); // Add only one midpoint on doubled-back segments,
+	          // turning them into self-intersections.
 
-	function write(key, data) {
-		return localStorage$1().setItem(key, data)
+	          return;
+	        }
+	      }
+	    });
+	    return graph;
+	  };
 	}
 
-	function each$2(fn) {
-		for (var i = localStorage$1().length - 1; i >= 0; i--) {
-			var key = localStorage$1().key(i);
-			fn(read(key), key);
-		}
+	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/AddNodeToWayAction.as
+	function actionAddVertex(wayId, nodeId, index) {
+	  return function (graph) {
+	    return graph.replace(graph.entity(wayId).addNode(nodeId, index));
+	  };
 	}
 
-	function remove$2(key) {
-		return localStorage$1().removeItem(key)
+	function actionChangeMember(relationId, member, memberIndex) {
+	  return function (graph) {
+	    return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
+	  };
 	}
 
-	function clearAll() {
-		return localStorage$1().clear()
+	function actionChangePreset(entityID, oldPreset, newPreset, skipFieldDefaults) {
+	  return function action(graph) {
+	    var entity = graph.entity(entityID);
+	    var geometry = entity.geometry(graph);
+	    var tags = entity.tags;
+	    if (oldPreset) tags = oldPreset.unsetTags(tags, geometry);
+	    if (newPreset) tags = newPreset.setTags(tags, geometry, skipFieldDefaults);
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
+	  };
 	}
 
-	// oldFF-globalStorage provides storage for Firefox
-	// versions 6 and 7, where no localStorage, etc
-	// is available.
-
-
-	var Global$2 = util.Global;
-
-	var oldFFGlobalStorage = {
-		name: 'oldFF-globalStorage',
-		read: read$1,
-		write: write$1,
-		each: each$3,
-		remove: remove$3,
-		clearAll: clearAll$1,
-	};
-
-	var globalStorage = Global$2.globalStorage;
-
-	function read$1(key) {
-		return globalStorage[key]
+	function actionChangeTags(entityId, tags) {
+	  return function (graph) {
+	    var entity = graph.entity(entityId);
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
+	  };
 	}
 
-	function write$1(key, data) {
-		globalStorage[key] = data;
+	function osmNode() {
+	  if (!(this instanceof osmNode)) {
+	    return new osmNode().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
 	}
+	osmEntity.node = osmNode;
+	osmNode.prototype = Object.create(osmEntity.prototype);
+	Object.assign(osmNode.prototype, {
+	  type: 'node',
+	  loc: [9999, 9999],
+	  extent: function extent() {
+	    return new geoExtent(this.loc);
+	  },
+	  geometry: function geometry(graph) {
+	    return graph["transient"](this, 'geometry', function () {
+	      return graph.isPoi(this) ? 'point' : 'vertex';
+	    });
+	  },
+	  move: function move(loc) {
+	    return this.update({
+	      loc: loc
+	    });
+	  },
+	  isDegenerate: function isDegenerate() {
+	    return !(Array.isArray(this.loc) && this.loc.length === 2 && this.loc[0] >= -180 && this.loc[0] <= 180 && this.loc[1] >= -90 && this.loc[1] <= 90);
+	  },
+	  // Inspect tags and geometry to determine which direction(s) this node/vertex points
+	  directions: function directions(resolver, projection) {
+	    var val;
+	    var i; // which tag to use?
+
+	    if (this.isHighwayIntersection(resolver) && (this.tags.stop || '').toLowerCase() === 'all') {
+	      // all-way stop tag on a highway intersection
+	      val = 'all';
+	    } else {
+	      // generic direction tag
+	      val = (this.tags.direction || '').toLowerCase(); // better suffix-style direction tag
 
-	function each$3(fn) {
-		for (var i = globalStorage.length - 1; i >= 0; i--) {
-			var key = globalStorage.key(i);
-			fn(globalStorage[key], key);
-		}
-	}
+	      var re = /:direction$/i;
+	      var keys = Object.keys(this.tags);
 
-	function remove$3(key) {
-		return globalStorage.removeItem(key)
-	}
+	      for (i = 0; i < keys.length; i++) {
+	        if (re.test(keys[i])) {
+	          val = this.tags[keys[i]].toLowerCase();
+	          break;
+	        }
+	      }
+	    }
 
-	function clearAll$1() {
-		each$3(function(key, _) {
-			delete globalStorage[key];
-		});
-	}
+	    if (val === '') return [];
+	    var cardinal = {
+	      north: 0,
+	      n: 0,
+	      northnortheast: 22,
+	      nne: 22,
+	      northeast: 45,
+	      ne: 45,
+	      eastnortheast: 67,
+	      ene: 67,
+	      east: 90,
+	      e: 90,
+	      eastsoutheast: 112,
+	      ese: 112,
+	      southeast: 135,
+	      se: 135,
+	      southsoutheast: 157,
+	      sse: 157,
+	      south: 180,
+	      s: 180,
+	      southsouthwest: 202,
+	      ssw: 202,
+	      southwest: 225,
+	      sw: 225,
+	      westsouthwest: 247,
+	      wsw: 247,
+	      west: 270,
+	      w: 270,
+	      westnorthwest: 292,
+	      wnw: 292,
+	      northwest: 315,
+	      nw: 315,
+	      northnorthwest: 337,
+	      nnw: 337
+	    };
+	    var values = val.split(';');
+	    var results = [];
+	    values.forEach(function (v) {
+	      // swap cardinal for numeric directions
+	      if (cardinal[v] !== undefined) {
+	        v = cardinal[v];
+	      } // numeric direction - just add to results
 
-	// oldIE-userDataStorage provides storage for Internet Explorer
-	// versions 6 and 7, where no localStorage, sessionStorage, etc
-	// is available.
 
+	      if (v !== '' && !isNaN(+v)) {
+	        results.push(+v);
+	        return;
+	      } // string direction - inspect parent ways
 
-	var Global$3 = util.Global;
 
-	var oldIEUserDataStorage = {
-		name: 'oldIE-userDataStorage',
-		write: write$2,
-		read: read$2,
-		each: each$4,
-		remove: remove$4,
-		clearAll: clearAll$2,
-	};
+	      var lookBackward = this.tags['traffic_sign:backward'] || v === 'backward' || v === 'both' || v === 'all';
+	      var lookForward = this.tags['traffic_sign:forward'] || v === 'forward' || v === 'both' || v === 'all';
+	      if (!lookForward && !lookBackward) return;
+	      var nodeIds = {};
+	      resolver.parentWays(this).forEach(function (parent) {
+	        var nodes = parent.nodes;
 
-	var storageName = 'storejs';
-	var doc = Global$3.document;
-	var _withStorageEl = _makeIEStorageElFunction();
-	var disable = (Global$3.navigator ? Global$3.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
+	        for (i = 0; i < nodes.length; i++) {
+	          if (nodes[i] === this.id) {
+	            // match current entity
+	            if (lookForward && i > 0) {
+	              nodeIds[nodes[i - 1]] = true; // look back to prev node
+	            }
 
-	function write$2(unfixedKey, data) {
-		if (disable) { return }
-		var fixedKey = fixKey(unfixedKey);
-		_withStorageEl(function(storageEl) {
-			storageEl.setAttribute(fixedKey, data);
-			storageEl.save(storageName);
-		});
-	}
+	            if (lookBackward && i < nodes.length - 1) {
+	              nodeIds[nodes[i + 1]] = true; // look ahead to next node
+	            }
+	          }
+	        }
+	      }, this);
+	      Object.keys(nodeIds).forEach(function (nodeId) {
+	        // +90 because geoAngle returns angle from X axis, not Y (north)
+	        results.push(geoAngle(this, resolver.entity(nodeId), projection) * (180 / Math.PI) + 90);
+	      }, this);
+	    }, this);
+	    return utilArrayUniq(results);
+	  },
+	  isEndpoint: function isEndpoint(resolver) {
+	    return resolver["transient"](this, 'isEndpoint', function () {
+	      var id = this.id;
+	      return resolver.parentWays(this).filter(function (parent) {
+	        return !parent.isClosed() && !!parent.affix(id);
+	      }).length > 0;
+	    });
+	  },
+	  isConnected: function isConnected(resolver) {
+	    return resolver["transient"](this, 'isConnected', function () {
+	      var parents = resolver.parentWays(this);
 
-	function read$2(unfixedKey) {
-		if (disable) { return }
-		var fixedKey = fixKey(unfixedKey);
-		var res = null;
-		_withStorageEl(function(storageEl) {
-			res = storageEl.getAttribute(fixedKey);
-		});
-		return res
-	}
+	      if (parents.length > 1) {
+	        // vertex is connected to multiple parent ways
+	        for (var i in parents) {
+	          if (parents[i].geometry(resolver) === 'line' && parents[i].hasInterestingTags()) return true;
+	        }
+	      } else if (parents.length === 1) {
+	        var way = parents[0];
+	        var nodes = way.nodes.slice();
 
-	function each$4(callback) {
-		_withStorageEl(function(storageEl) {
-			var attributes = storageEl.XMLDocument.documentElement.attributes;
-			for (var i=attributes.length-1; i>=0; i--) {
-				var attr = attributes[i];
-				callback(storageEl.getAttribute(attr.name), attr.name);
-			}
-		});
-	}
+	        if (way.isClosed()) {
+	          nodes.pop();
+	        } // ignore connecting node if closed
+	        // return true if vertex appears multiple times (way is self intersecting)
 
-	function remove$4(unfixedKey) {
-		var fixedKey = fixKey(unfixedKey);
-		_withStorageEl(function(storageEl) {
-			storageEl.removeAttribute(fixedKey);
-			storageEl.save(storageName);
-		});
-	}
 
-	function clearAll$2() {
-		_withStorageEl(function(storageEl) {
-			var attributes = storageEl.XMLDocument.documentElement.attributes;
-			storageEl.load(storageName);
-			for (var i=attributes.length-1; i>=0; i--) {
-				storageEl.removeAttribute(attributes[i].name);
-			}
-			storageEl.save(storageName);
-		});
-	}
+	        return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
+	      }
 
-	// Helpers
-	//////////
+	      return false;
+	    });
+	  },
+	  parentIntersectionWays: function parentIntersectionWays(resolver) {
+	    return resolver["transient"](this, 'parentIntersectionWays', function () {
+	      return resolver.parentWays(this).filter(function (parent) {
+	        return (parent.tags.highway || parent.tags.waterway || parent.tags.railway || parent.tags.aeroway) && parent.geometry(resolver) === 'line';
+	      });
+	    });
+	  },
+	  isIntersection: function isIntersection(resolver) {
+	    return this.parentIntersectionWays(resolver).length > 1;
+	  },
+	  isHighwayIntersection: function isHighwayIntersection(resolver) {
+	    return resolver["transient"](this, 'isHighwayIntersection', function () {
+	      return resolver.parentWays(this).filter(function (parent) {
+	        return parent.tags.highway && parent.geometry(resolver) === 'line';
+	      }).length > 1;
+	    });
+	  },
+	  isOnAddressLine: function isOnAddressLine(resolver) {
+	    return resolver["transient"](this, 'isOnAddressLine', function () {
+	      return resolver.parentWays(this).filter(function (parent) {
+	        return parent.tags.hasOwnProperty('addr:interpolation') && parent.geometry(resolver) === 'line';
+	      }).length > 0;
+	    });
+	  },
+	  asJXON: function asJXON(changeset_id) {
+	    var r = {
+	      node: {
+	        '@id': this.osmId(),
+	        '@lon': this.loc[0],
+	        '@lat': this.loc[1],
+	        '@version': this.version || 0,
+	        tag: Object.keys(this.tags).map(function (k) {
+	          return {
+	            keyAttributes: {
+	              k: k,
+	              v: this.tags[k]
+	            }
+	          };
+	        }, this)
+	      }
+	    };
+	    if (changeset_id) r.node['@changeset'] = changeset_id;
+	    return r;
+	  },
+	  asGeoJSON: function asGeoJSON() {
+	    return {
+	      type: 'Point',
+	      coordinates: this.loc
+	    };
+	  }
+	});
 
-	// In IE7, keys cannot start with a digit or contain certain chars.
-	// See https://github.com/marcuswestin/store.js/issues/40
-	// See https://github.com/marcuswestin/store.js/issues/83
-	var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
-	function fixKey(key) {
-		return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___')
-	}
+	function actionCircularize(wayId, projection, maxAngle) {
+	  maxAngle = (maxAngle || 20) * Math.PI / 180;
+
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var way = graph.entity(wayId);
+	    var origNodes = {};
+	    graph.childNodes(way).forEach(function (node) {
+	      if (!origNodes[node.id]) origNodes[node.id] = node;
+	    });
 
-	function _makeIEStorageElFunction() {
-		if (!doc || !doc.documentElement || !doc.documentElement.addBehavior) {
-			return null
-		}
-		var scriptTag = 'script',
-			storageOwner,
-			storageContainer,
-			storageEl;
-
-		// Since #userData storage applies only to specific paths, we need to
-		// somehow link our data to a specific path.  We choose /favicon.ico
-		// as a pretty safe option, since all browsers already make a request to
-		// this URL anyway and being a 404 will not hurt us here.  We wrap an
-		// iframe pointing to the favicon in an ActiveXObject(htmlfile) object
-		// (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
-		// since the iframe access rules appear to allow direct access and
-		// manipulation of the document element, even for a 404 page.  This
-		// document can be used instead of the current document (which would
-		// have been limited to the current path) to perform #userData storage.
-		try {
-			/* global ActiveXObject */
-			storageContainer = new ActiveXObject('htmlfile');
-			storageContainer.open();
-			storageContainer.write('<'+scriptTag+'>document.w=window</'+scriptTag+'><iframe src="/favicon.ico"></iframe>');
-			storageContainer.close();
-			storageOwner = storageContainer.w.frames[0].document;
-			storageEl = storageOwner.createElement('div');
-		} catch(e) {
-			// somehow ActiveXObject instantiation failed (perhaps some special
-			// security settings or otherwse), fall back to per-path storage
-			storageEl = doc.createElement('div');
-			storageOwner = doc.body;
-		}
-
-		return function(storeFunction) {
-			var args = [].slice.call(arguments, 0);
-			args.unshift(storageEl);
-			// See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
-			// and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
-			storageOwner.appendChild(storageEl);
-			storageEl.addBehavior('#default#userData');
-			storageEl.load(storageName);
-			storeFunction.apply(this, args);
-			storageOwner.removeChild(storageEl);
-			return
-		}
-	}
-
-	// cookieStorage is useful Safari private browser mode, where localStorage
-	// doesn't work but cookies do. This implementation is adopted from
-	// https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
+	    if (!way.isConvex(graph)) {
+	      graph = action.makeConvex(graph);
+	    }
+
+	    var nodes = utilArrayUniq(graph.childNodes(way));
+	    var keyNodes = nodes.filter(function (n) {
+	      return graph.parentWays(n).length !== 1;
+	    });
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var keyPoints = keyNodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var centroid = points.length === 2 ? geoVecInterp(points[0], points[1], 0.5) : d3_polygonCentroid(points);
+	    var radius = d3_median(points, function (p) {
+	      return geoVecLength(centroid, p);
+	    });
+	    var sign = d3_polygonArea(points) > 0 ? 1 : -1;
+	    var ids, i, j, k; // we need at least two key nodes for the algorithm to work
+
+	    if (!keyNodes.length) {
+	      keyNodes = [nodes[0]];
+	      keyPoints = [points[0]];
+	    }
+
+	    if (keyNodes.length === 1) {
+	      var index = nodes.indexOf(keyNodes[0]);
+	      var oppositeIndex = Math.floor((index + nodes.length / 2) % nodes.length);
+	      keyNodes.push(nodes[oppositeIndex]);
+	      keyPoints.push(points[oppositeIndex]);
+	    } // key points and nodes are those connected to the ways,
+	    // they are projected onto the circle, in between nodes are moved
+	    // to constant intervals between key nodes, extra in between nodes are
+	    // added if necessary.
+
+
+	    for (i = 0; i < keyPoints.length; i++) {
+	      var nextKeyNodeIndex = (i + 1) % keyNodes.length;
+	      var startNode = keyNodes[i];
+	      var endNode = keyNodes[nextKeyNodeIndex];
+	      var startNodeIndex = nodes.indexOf(startNode);
+	      var endNodeIndex = nodes.indexOf(endNode);
+	      var numberNewPoints = -1;
+	      var indexRange = endNodeIndex - startNodeIndex;
+	      var nearNodes = {};
+	      var inBetweenNodes = [];
+	      var startAngle, endAngle, totalAngle, eachAngle;
+	      var angle, loc, node, origNode;
+
+	      if (indexRange < 0) {
+	        indexRange += nodes.length;
+	      } // position this key node
+
+
+	      var distance = geoVecLength(centroid, keyPoints[i]) || 1e-4;
+	      keyPoints[i] = [centroid[0] + (keyPoints[i][0] - centroid[0]) / distance * radius, centroid[1] + (keyPoints[i][1] - centroid[1]) / distance * radius];
+	      loc = projection.invert(keyPoints[i]);
+	      node = keyNodes[i];
+	      origNode = origNodes[node.id];
+	      node = node.move(geoVecInterp(origNode.loc, loc, t));
+	      graph = graph.replace(node); // figure out the between delta angle we want to match to
+
+	      startAngle = Math.atan2(keyPoints[i][1] - centroid[1], keyPoints[i][0] - centroid[0]);
+	      endAngle = Math.atan2(keyPoints[nextKeyNodeIndex][1] - centroid[1], keyPoints[nextKeyNodeIndex][0] - centroid[0]);
+	      totalAngle = endAngle - startAngle; // detects looping around -pi/pi
+
+	      if (totalAngle * sign > 0) {
+	        totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
+	      }
 
+	      do {
+	        numberNewPoints++;
+	        eachAngle = totalAngle / (indexRange + numberNewPoints);
+	      } while (Math.abs(eachAngle) > maxAngle); // move existing nodes
 
-	var Global$4 = util.Global;
-	var trim$1 = util.trim;
 
-	var cookieStorage = {
-		name: 'cookieStorage',
-		read: read$3,
-		write: write$3,
-		each: each$5,
-		remove: remove$5,
-		clearAll: clearAll$3,
-	};
+	      for (j = 1; j < indexRange; j++) {
+	        angle = startAngle + j * eachAngle;
+	        loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]);
+	        node = nodes[(j + startNodeIndex) % nodes.length];
+	        origNode = origNodes[node.id];
+	        nearNodes[node.id] = angle;
+	        node = node.move(geoVecInterp(origNode.loc, loc, t));
+	        graph = graph.replace(node);
+	      } // add new in between nodes if necessary
 
-	var doc$1 = Global$4.document;
 
-	function read$3(key) {
-		if (!key || !_has(key)) { return null }
-		var regexpStr = "(?:^|.*;\\s*)" +
-			escape(key).replace(/[\-\.\+\*]/g, "\\$&") +
-			"\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
-		return unescape(doc$1.cookie.replace(new RegExp(regexpStr), "$1"))
-	}
+	      for (j = 0; j < numberNewPoints; j++) {
+	        angle = startAngle + (indexRange + j) * eachAngle;
+	        loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]); // choose a nearnode to use as the original
 
-	function each$5(callback) {
-		var cookies = doc$1.cookie.split(/; ?/g);
-		for (var i = cookies.length - 1; i >= 0; i--) {
-			if (!trim$1(cookies[i])) {
-				continue
-			}
-			var kvp = cookies[i].split('=');
-			var key = unescape(kvp[0]);
-			var val = unescape(kvp[1]);
-			callback(val, key);
-		}
-	}
+	        var min = Infinity;
 
-	function write$3(key, data) {
-		if(!key) { return }
-		doc$1.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
-	}
+	        for (var nodeId in nearNodes) {
+	          var nearAngle = nearNodes[nodeId];
+	          var dist = Math.abs(nearAngle - angle);
 
-	function remove$5(key) {
-		if (!key || !_has(key)) {
-			return
-		}
-		doc$1.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
-	}
+	          if (dist < min) {
+	            min = dist;
+	            origNode = origNodes[nodeId];
+	          }
+	        }
 
-	function clearAll$3() {
-		each$5(function(_, key) {
-			remove$5(key);
-		});
-	}
+	        node = osmNode({
+	          loc: geoVecInterp(origNode.loc, loc, t)
+	        });
+	        graph = graph.replace(node);
+	        nodes.splice(endNodeIndex + j, 0, node);
+	        inBetweenNodes.push(node.id);
+	      } // Check for other ways that share these keyNodes..
+	      // If keyNodes are adjacent in both ways,
+	      // we can add inBetweenNodes to that shared way too..
 
-	function _has(key) {
-		return (new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=")).test(doc$1.cookie)
-	}
 
-	var Global$5 = util.Global;
+	      if (indexRange === 1 && inBetweenNodes.length) {
+	        var startIndex1 = way.nodes.lastIndexOf(startNode.id);
+	        var endIndex1 = way.nodes.lastIndexOf(endNode.id);
+	        var wayDirection1 = endIndex1 - startIndex1;
 
-	var sessionStorage_1 = {
-		name: 'sessionStorage',
-		read: read$4,
-		write: write$4,
-		each: each$6,
-		remove: remove$6,
-		clearAll: clearAll$4
-	};
+	        if (wayDirection1 < -1) {
+	          wayDirection1 = 1;
+	        }
 
-	function sessionStorage() {
-		return Global$5.sessionStorage
-	}
+	        var parentWays = graph.parentWays(keyNodes[i]);
+
+	        for (j = 0; j < parentWays.length; j++) {
+	          var sharedWay = parentWays[j];
+	          if (sharedWay === way) continue;
 
-	function read$4(key) {
-		return sessionStorage().getItem(key)
-	}
+	          if (sharedWay.areAdjacent(startNode.id, endNode.id)) {
+	            var startIndex2 = sharedWay.nodes.lastIndexOf(startNode.id);
+	            var endIndex2 = sharedWay.nodes.lastIndexOf(endNode.id);
+	            var wayDirection2 = endIndex2 - startIndex2;
+	            var insertAt = endIndex2;
 
-	function write$4(key, data) {
-		return sessionStorage().setItem(key, data)
-	}
+	            if (wayDirection2 < -1) {
+	              wayDirection2 = 1;
+	            }
 
-	function each$6(fn) {
-		for (var i = sessionStorage().length - 1; i >= 0; i--) {
-			var key = sessionStorage().key(i);
-			fn(read$4(key), key);
-		}
-	}
+	            if (wayDirection1 !== wayDirection2) {
+	              inBetweenNodes.reverse();
+	              insertAt = startIndex2;
+	            }
 
-	function remove$6(key) {
-		return sessionStorage().removeItem(key)
-	}
+	            for (k = 0; k < inBetweenNodes.length; k++) {
+	              sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
+	            }
 
-	function clearAll$4() {
-		return sessionStorage().clear()
-	}
+	            graph = graph.replace(sharedWay);
+	          }
+	        }
+	      }
+	    } // update the way to have all the new nodes
 
-	// memoryStorage is a useful last fallback to ensure that the store
-	// is functions (meaning store.get(), store.set(), etc will all function).
-	// However, stored values will not persist when the browser navigates to
-	// a new page or reloads the current page.
 
-	var memoryStorage_1 = {
-		name: 'memoryStorage',
-		read: read$5,
-		write: write$5,
-		each: each$7,
-		remove: remove$7,
-		clearAll: clearAll$5,
-	};
+	    ids = nodes.map(function (n) {
+	      return n.id;
+	    });
+	    ids.push(ids[0]);
+	    way = way.update({
+	      nodes: ids
+	    });
+	    graph = graph.replace(way);
+	    return graph;
+	  };
 
-	var memoryStorage = {};
+	  action.makeConvex = function (graph) {
+	    var way = graph.entity(wayId);
+	    var nodes = utilArrayUniq(graph.childNodes(way));
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var sign = d3_polygonArea(points) > 0 ? 1 : -1;
+	    var hull = d3_polygonHull(points);
+	    var i, j; // D3 convex hulls go counterclockwise..
 
-	function read$5(key) {
-		return memoryStorage[key]
-	}
+	    if (sign === -1) {
+	      nodes.reverse();
+	      points.reverse();
+	    }
 
-	function write$5(key, data) {
-		memoryStorage[key] = data;
-	}
+	    for (i = 0; i < hull.length - 1; i++) {
+	      var startIndex = points.indexOf(hull[i]);
+	      var endIndex = points.indexOf(hull[i + 1]);
+	      var indexRange = endIndex - startIndex;
 
-	function each$7(callback) {
-		for (var key in memoryStorage) {
-			if (memoryStorage.hasOwnProperty(key)) {
-				callback(memoryStorage[key], key);
-			}
-		}
-	}
+	      if (indexRange < 0) {
+	        indexRange += nodes.length;
+	      } // move interior nodes to the surface of the convex hull..
 
-	function remove$7(key) {
-		delete memoryStorage[key];
-	}
 
-	function clearAll$5(key) {
-		memoryStorage = {};
-	}
+	      for (j = 1; j < indexRange; j++) {
+	        var point = geoVecInterp(hull[i], hull[i + 1], j / indexRange);
+	        var node = nodes[(j + startIndex) % nodes.length].move(projection.invert(point));
+	        graph = graph.replace(node);
+	      }
+	    }
 
-	var all = [
-		// Listed in order of usage preference
-		localStorage_1,
-		oldFFGlobalStorage,
-		oldIEUserDataStorage,
-		cookieStorage,
-		sessionStorage_1,
-		memoryStorage_1
-	];
+	    return graph;
+	  };
 
-	/* eslint-disable */
+	  action.disabled = function (graph) {
+	    if (!graph.entity(wayId).isClosed()) {
+	      return 'not_closed';
+	    } //disable when already circular
 
-	//  json2.js
-	//  2016-10-28
-	//  Public Domain.
-	//  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
-	//  See http://www.JSON.org/js.html
-	//  This code should be minified before deployment.
-	//  See http://javascript.crockford.com/jsmin.html
 
-	//  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
-	//  NOT CONTROL.
+	    var way = graph.entity(wayId);
+	    var nodes = utilArrayUniq(graph.childNodes(way));
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var hull = d3_polygonHull(points);
+	    var epsilonAngle = Math.PI / 180;
 
-	//  This file creates a global JSON object containing two methods: stringify
-	//  and parse. This file provides the ES5 JSON capability to ES3 systems.
-	//  If a project might run on IE8 or earlier, then this file should be included.
-	//  This file does nothing on ES5 systems.
+	    if (hull.length !== points.length || hull.length < 3) {
+	      return false;
+	    }
 
-	//      JSON.stringify(value, replacer, space)
-	//          value       any JavaScript value, usually an object or array.
-	//          replacer    an optional parameter that determines how object
-	//                      values are stringified for objects. It can be a
-	//                      function or an array of strings.
-	//          space       an optional parameter that specifies the indentation
-	//                      of nested structures. If it is omitted, the text will
-	//                      be packed without extra whitespace. If it is a number,
-	//                      it will specify the number of spaces to indent at each
-	//                      level. If it is a string (such as "\t" or "&nbsp;"),
-	//                      it contains the characters used to indent at each level.
-	//          This method produces a JSON text from a JavaScript value.
-	//          When an object value is found, if the object contains a toJSON
-	//          method, its toJSON method will be called and the result will be
-	//          stringified. A toJSON method does not serialize: it returns the
-	//          value represented by the name/value pair that should be serialized,
-	//          or undefined if nothing should be serialized. The toJSON method
-	//          will be passed the key associated with the value, and this will be
-	//          bound to the value.
+	    var centroid = d3_polygonCentroid(points);
+	    var radius = geoVecLengthSquare(centroid, points[0]);
+	    var i, actualPoint; // compare distances between centroid and points
 
-	//          For example, this would serialize Dates as ISO strings.
+	    for (i = 0; i < hull.length; i++) {
+	      actualPoint = hull[i];
+	      var actualDist = geoVecLengthSquare(actualPoint, centroid);
+	      var diff = Math.abs(actualDist - radius); //compare distances with epsilon-error (5%)
 
-	//              Date.prototype.toJSON = function (key) {
-	//                  function f(n) {
-	//                      // Format integers to have at least two digits.
-	//                      return (n < 10)
-	//                          ? "0" + n
-	//                          : n;
-	//                  }
-	//                  return this.getUTCFullYear()   + "-" +
-	//                       f(this.getUTCMonth() + 1) + "-" +
-	//                       f(this.getUTCDate())      + "T" +
-	//                       f(this.getUTCHours())     + ":" +
-	//                       f(this.getUTCMinutes())   + ":" +
-	//                       f(this.getUTCSeconds())   + "Z";
-	//              };
+	      if (diff > 0.05 * radius) {
+	        return false;
+	      }
+	    } //check if central angles are smaller than maxAngle
 
-	//          You can provide an optional replacer method. It will be passed the
-	//          key and value of each member, with this bound to the containing
-	//          object. The value that is returned from your method will be
-	//          serialized. If your method returns undefined, then the member will
-	//          be excluded from the serialization.
 
-	//          If the replacer parameter is an array of strings, then it will be
-	//          used to select the members to be serialized. It filters the results
-	//          such that only members with keys listed in the replacer array are
-	//          stringified.
+	    for (i = 0; i < hull.length; i++) {
+	      actualPoint = hull[i];
+	      var nextPoint = hull[(i + 1) % hull.length];
+	      var startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
+	      var endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
+	      var angle = endAngle - startAngle;
 
-	//          Values that do not have JSON representations, such as undefined or
-	//          functions, will not be serialized. Such values in objects will be
-	//          dropped; in arrays they will be replaced with null. You can use
-	//          a replacer function to replace those with JSON values.
+	      if (angle < 0) {
+	        angle = -angle;
+	      }
 
-	//          JSON.stringify(undefined) returns undefined.
+	      if (angle > Math.PI) {
+	        angle = 2 * Math.PI - angle;
+	      }
 
-	//          The optional space parameter produces a stringification of the
-	//          value that is filled with line breaks and indentation to make it
-	//          easier to read.
+	      if (angle > maxAngle + epsilonAngle) {
+	        return false;
+	      }
+	    }
 
-	//          If the space parameter is a non-empty string, then that string will
-	//          be used for indentation. If the space parameter is a number, then
-	//          the indentation will be that many spaces.
+	    return 'already_circular';
+	  };
 
-	//          Example:
+	  action.transitionable = true;
+	  return action;
+	}
 
-	//          text = JSON.stringify(["e", {pluribus: "unum"}]);
-	//          // text is '["e",{"pluribus":"unum"}]'
+	function actionDeleteWay(wayID) {
+	  function canDeleteNode(node, graph) {
+	    // don't delete nodes still attached to ways or relations
+	    if (graph.parentWays(node).length || graph.parentRelations(node).length) return false;
+	    var geometries = osmNodeGeometriesForTags(node.tags); // don't delete if this node can be a standalone point
 
-	//          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
-	//          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+	    if (geometries.point) return false; // delete if this node only be a vertex
 
-	//          text = JSON.stringify([new Date()], function (key, value) {
-	//              return this[key] instanceof Date
-	//                  ? "Date(" + this[key] + ")"
-	//                  : value;
-	//          });
-	//          // text is '["Date(---current time---)"]'
+	    if (geometries.vertex) return true; // iD doesn't know if this should be a point or vertex,
+	    // so only delete if there are no interesting tags
 
-	//      JSON.parse(text, reviver)
-	//          This method parses a JSON text to produce an object or array.
-	//          It can throw a SyntaxError exception.
+	    return !node.hasInterestingTags();
+	  }
 
-	//          The optional reviver parameter is a function that can filter and
-	//          transform the results. It receives each of the keys and values,
-	//          and its return value is used instead of the original value.
-	//          If it returns what it received, then the structure is not modified.
-	//          If it returns undefined then the member is deleted.
+	  var action = function action(graph) {
+	    var way = graph.entity(wayID);
+	    graph.parentRelations(way).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(wayID);
+	      graph = graph.replace(parent);
 
-	//          Example:
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteRelation(parent.id)(graph);
+	      }
+	    });
+	    new Set(way.nodes).forEach(function (nodeID) {
+	      graph = graph.replace(way.removeNode(nodeID));
+	      var node = graph.entity(nodeID);
 
-	//          // Parse the text. Values that look like ISO date strings will
-	//          // be converted to Date objects.
+	      if (canDeleteNode(node, graph)) {
+	        graph = graph.remove(node);
+	      }
+	    });
+	    return graph.remove(way);
+	  };
 
-	//          myData = JSON.parse(text, function (key, value) {
-	//              var a;
-	//              if (typeof value === "string") {
-	//                  a =
-	//   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
-	//                  if (a) {
-	//                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
-	//                          +a[5], +a[6]));
-	//                  }
-	//              }
-	//              return value;
-	//          });
+	  return action;
+	}
 
-	//          myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
-	//              var d;
-	//              if (typeof value === "string" &&
-	//                      value.slice(0, 5) === "Date(" &&
-	//                      value.slice(-1) === ")") {
-	//                  d = new Date(value.slice(5, -1));
-	//                  if (d) {
-	//                      return d;
-	//                  }
-	//              }
-	//              return value;
-	//          });
+	function actionDeleteMultiple(ids) {
+	  var actions = {
+	    way: actionDeleteWay,
+	    node: actionDeleteNode,
+	    relation: actionDeleteRelation
+	  };
 
-	//  This is a reference implementation. You are free to copy, modify, or
-	//  redistribute.
+	  var action = function action(graph) {
+	    ids.forEach(function (id) {
+	      if (graph.hasEntity(id)) {
+	        // It may have been deleted already.
+	        graph = actions[graph.entity(id).type](id)(graph);
+	      }
+	    });
+	    return graph;
+	  };
 
-	/*jslint
-	    eval, for, this
-	*/
+	  return action;
+	}
 
-	/*property
-	    JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
-	    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
-	    lastIndex, length, parse, prototype, push, replace, slice, stringify,
-	    test, toJSON, toString, valueOf
-	*/
+	function actionDeleteRelation(relationID, allowUntaggedMembers) {
+	  function canDeleteEntity(entity, graph) {
+	    return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
+	  }
 
+	  var action = function action(graph) {
+	    var relation = graph.entity(relationID);
+	    graph.parentRelations(relation).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(relationID);
+	      graph = graph.replace(parent);
 
-	// Create a JSON object only if one does not already exist. We create the
-	// methods in a closure to avoid creating global variables.
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteRelation(parent.id)(graph);
+	      }
+	    });
+	    var memberIDs = utilArrayUniq(relation.members.map(function (m) {
+	      return m.id;
+	    }));
+	    memberIDs.forEach(function (memberID) {
+	      graph = graph.replace(relation.removeMembersWithID(memberID));
+	      var entity = graph.entity(memberID);
+
+	      if (canDeleteEntity(entity, graph)) {
+	        graph = actionDeleteMultiple([memberID])(graph);
+	      }
+	    });
+	    return graph.remove(relation);
+	  };
 
-	if (typeof JSON !== "object") {
-	    JSON = {};
+	  return action;
 	}
 
-	(function () {
+	function actionDeleteNode(nodeId) {
+	  var action = function action(graph) {
+	    var node = graph.entity(nodeId);
+	    graph.parentWays(node).forEach(function (parent) {
+	      parent = parent.removeNode(nodeId);
+	      graph = graph.replace(parent);
+
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteWay(parent.id)(graph);
+	      }
+	    });
+	    graph.parentRelations(node).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(nodeId);
+	      graph = graph.replace(parent);
 
-	    var rx_one = /^[\],:{}\s]*$/;
-	    var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
-	    var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
-	    var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
-	    var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
-	    var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteRelation(parent.id)(graph);
+	      }
+	    });
+	    return graph.remove(node);
+	  };
 
-	    function f(n) {
-	        // Format integers to have at least two digits.
-	        return n < 10
-	            ? "0" + n
-	            : n;
-	    }
+	  return action;
+	}
 
-	    function this_value() {
-	        return this.valueOf();
-	    }
+	//
+	// First choose a node to be the survivor, with preference given
+	// to an existing (not new) node.
+	//
+	// Tags and relation memberships of of non-surviving nodes are merged
+	// to the survivor.
+	//
+	// This is the inverse of `iD.actionDisconnect`.
+	//
+	// Reference:
+	//   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeNodesAction.as
+	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/MergeNodesAction.java
+	//
+
+	function actionConnect(nodeIDs) {
+	  var action = function action(graph) {
+	    var survivor;
+	    var node;
+	    var parents;
+	    var i, j; // Choose a survivor node, prefer an existing (not new) node - #4974
 
-	    if (typeof Date.prototype.toJSON !== "function") {
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      survivor = graph.entity(nodeIDs[i]);
+	      if (survivor.version) break; // found one
+	    } // Replace all non-surviving nodes with the survivor and merge tags.
 
-	        Date.prototype.toJSON = function () {
 
-	            return isFinite(this.valueOf())
-	                ? this.getUTCFullYear() + "-" +
-	                        f(this.getUTCMonth() + 1) + "-" +
-	                        f(this.getUTCDate()) + "T" +
-	                        f(this.getUTCHours()) + ":" +
-	                        f(this.getUTCMinutes()) + ":" +
-	                        f(this.getUTCSeconds()) + "Z"
-	                : null;
-	        };
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      if (node.id === survivor.id) continue;
+	      parents = graph.parentWays(node);
 
-	        Boolean.prototype.toJSON = this_value;
-	        Number.prototype.toJSON = this_value;
-	        String.prototype.toJSON = this_value;
-	    }
+	      for (j = 0; j < parents.length; j++) {
+	        graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
+	      }
+
+	      parents = graph.parentRelations(node);
 
-	    var gap;
-	    var indent;
-	    var meta;
-	    var rep;
+	      for (j = 0; j < parents.length; j++) {
+	        graph = graph.replace(parents[j].replaceMember(node, survivor));
+	      }
 
+	      survivor = survivor.mergeTags(node.tags);
+	      graph = actionDeleteNode(node.id)(graph);
+	    }
 
-	    function quote(string) {
+	    graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices
 
-	// If the string contains no control characters, no quote characters, and no
-	// backslash characters, then we can safely slap some quotes around it.
-	// Otherwise we must also replace the offending characters with safe escape
-	// sequences.
+	    parents = graph.parentWays(survivor);
 
-	        rx_escapable.lastIndex = 0;
-	        return rx_escapable.test(string)
-	            ? "\"" + string.replace(rx_escapable, function (a) {
-	                var c = meta[a];
-	                return typeof c === "string"
-	                    ? c
-	                    : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
-	            }) + "\""
-	            : "\"" + string + "\"";
+	    for (i = 0; i < parents.length; i++) {
+	      if (parents[i].isDegenerate()) {
+	        graph = actionDeleteWay(parents[i].id)(graph);
+	      }
 	    }
 
+	    return graph;
+	  };
+
+	  action.disabled = function (graph) {
+	    var seen = {};
+	    var restrictionIDs = [];
+	    var survivor;
+	    var node, way;
+	    var relations, relation, role;
+	    var i, j, k; // Choose a survivor node, prefer an existing (not new) node - #4974
 
-	    function str(key, holder) {
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      survivor = graph.entity(nodeIDs[i]);
+	      if (survivor.version) break; // found one
+	    } // 1. disable if the nodes being connected have conflicting relation roles
 
-	// Produce a string from holder[key].
 
-	        var i;          // The loop counter.
-	        var k;          // The member key.
-	        var v;          // The member value.
-	        var length;
-	        var mind = gap;
-	        var partial;
-	        var value = holder[key];
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      relations = graph.parentRelations(node);
 
-	// If the value has a toJSON method, call it to obtain a replacement value.
+	      for (j = 0; j < relations.length; j++) {
+	        relation = relations[j];
+	        role = relation.memberById(node.id).role || ''; // if this node is a via node in a restriction, remember for later
 
-	        if (value && typeof value === "object" &&
-	                typeof value.toJSON === "function") {
-	            value = value.toJSON(key);
+	        if (relation.hasFromViaTo()) {
+	          restrictionIDs.push(relation.id);
 	        }
 
-	// If we were called with a replacer function, then call the replacer to
-	// obtain a replacement value.
-
-	        if (typeof rep === "function") {
-	            value = rep.call(holder, key, value);
+	        if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
+	          return 'relation';
+	        } else {
+	          seen[relation.id] = role;
 	        }
+	      }
+	    } // gather restrictions for parent ways
 
-	// What happens next depends on the value's type.
 
-	        switch (typeof value) {
-	        case "string":
-	            return quote(value);
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      var parents = graph.parentWays(node);
 
-	        case "number":
+	      for (j = 0; j < parents.length; j++) {
+	        var parent = parents[j];
+	        relations = graph.parentRelations(parent);
 
-	// JSON numbers must be finite. Encode non-finite numbers as null.
+	        for (k = 0; k < relations.length; k++) {
+	          relation = relations[k];
+
+	          if (relation.hasFromViaTo()) {
+	            restrictionIDs.push(relation.id);
+	          }
+	        }
+	      }
+	    } // test restrictions
 
-	            return isFinite(value)
-	                ? String(value)
-	                : "null";
 
-	        case "boolean":
-	        case "null":
+	    restrictionIDs = utilArrayUniq(restrictionIDs);
 
-	// If the value is a boolean or null, convert it to a string. Note:
-	// typeof null does not produce "null". The case is included here in
-	// the remote chance that this gets fixed someday.
+	    for (i = 0; i < restrictionIDs.length; i++) {
+	      relation = graph.entity(restrictionIDs[i]);
+	      if (!relation.isComplete(graph)) continue;
+	      var memberWays = relation.members.filter(function (m) {
+	        return m.type === 'way';
+	      }).map(function (m) {
+	        return graph.entity(m.id);
+	      });
+	      memberWays = utilArrayUniq(memberWays);
+	      var f = relation.memberByRole('from');
+	      var t = relation.memberByRole('to');
+	      var isUturn = f.id === t.id; // 2a. disable if connection would damage a restriction
+	      // (a key node is a node at the junction of ways)
+
+	      var nodes = {
+	        from: [],
+	        via: [],
+	        to: [],
+	        keyfrom: [],
+	        keyto: []
+	      };
 
-	            return String(value);
+	      for (j = 0; j < relation.members.length; j++) {
+	        collectNodes(relation.members[j], nodes);
+	      }
 
-	// If the type is "object", we might be dealing with an object or an array or
-	// null.
+	      nodes.keyfrom = utilArrayUniq(nodes.keyfrom.filter(hasDuplicates));
+	      nodes.keyto = utilArrayUniq(nodes.keyto.filter(hasDuplicates));
+	      var filter = keyNodeFilter(nodes.keyfrom, nodes.keyto);
+	      nodes.from = nodes.from.filter(filter);
+	      nodes.via = nodes.via.filter(filter);
+	      nodes.to = nodes.to.filter(filter);
+	      var connectFrom = false;
+	      var connectVia = false;
+	      var connectTo = false;
+	      var connectKeyFrom = false;
+	      var connectKeyTo = false;
 
-	        case "object":
+	      for (j = 0; j < nodeIDs.length; j++) {
+	        var n = nodeIDs[j];
 
-	// Due to a specification blunder in ECMAScript, typeof null is "object",
-	// so watch out for that case.
+	        if (nodes.from.indexOf(n) !== -1) {
+	          connectFrom = true;
+	        }
 
-	            if (!value) {
-	                return "null";
-	            }
+	        if (nodes.via.indexOf(n) !== -1) {
+	          connectVia = true;
+	        }
 
-	// Make an array to hold the partial results of stringifying this object value.
+	        if (nodes.to.indexOf(n) !== -1) {
+	          connectTo = true;
+	        }
 
-	            gap += indent;
-	            partial = [];
+	        if (nodes.keyfrom.indexOf(n) !== -1) {
+	          connectKeyFrom = true;
+	        }
 
-	// Is the value an array?
+	        if (nodes.keyto.indexOf(n) !== -1) {
+	          connectKeyTo = true;
+	        }
+	      }
 
-	            if (Object.prototype.toString.apply(value) === "[object Array]") {
+	      if (connectFrom && connectTo && !isUturn) {
+	        return 'restriction';
+	      }
 
-	// The value is an array. Stringify every element. Use null as a placeholder
-	// for non-JSON values.
+	      if (connectFrom && connectVia) {
+	        return 'restriction';
+	      }
 
-	                length = value.length;
-	                for (i = 0; i < length; i += 1) {
-	                    partial[i] = str(i, value) || "null";
-	                }
+	      if (connectTo && connectVia) {
+	        return 'restriction';
+	      } // connecting to a key node -
+	      // if both nodes are on a member way (i.e. part of the turn restriction),
+	      // the connecting node must be adjacent to the key node.
 
-	// Join all of the elements together, separated with commas, and wrap them in
-	// brackets.
 
-	                v = partial.length === 0
-	                    ? "[]"
-	                    : gap
-	                        ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]"
-	                        : "[" + partial.join(",") + "]";
-	                gap = mind;
-	                return v;
-	            }
+	      if (connectKeyFrom || connectKeyTo) {
+	        if (nodeIDs.length !== 2) {
+	          return 'restriction';
+	        }
 
-	// If the replacer is an array, use it to select the members to be stringified.
-
-	            if (rep && typeof rep === "object") {
-	                length = rep.length;
-	                for (i = 0; i < length; i += 1) {
-	                    if (typeof rep[i] === "string") {
-	                        k = rep[i];
-	                        v = str(k, value);
-	                        if (v) {
-	                            partial.push(quote(k) + (
-	                                gap
-	                                    ? ": "
-	                                    : ":"
-	                            ) + v);
-	                        }
-	                    }
-	                }
-	            } else {
+	        var n0 = null;
+	        var n1 = null;
 
-	// Otherwise, iterate through all of the keys in the object.
-
-	                for (k in value) {
-	                    if (Object.prototype.hasOwnProperty.call(value, k)) {
-	                        v = str(k, value);
-	                        if (v) {
-	                            partial.push(quote(k) + (
-	                                gap
-	                                    ? ": "
-	                                    : ":"
-	                            ) + v);
-	                        }
-	                    }
-	                }
-	            }
+	        for (j = 0; j < memberWays.length; j++) {
+	          way = memberWays[j];
 
-	// Join all of the member texts together, separated with commas,
-	// and wrap them in braces.
+	          if (way.contains(nodeIDs[0])) {
+	            n0 = nodeIDs[0];
+	          }
 
-	            v = partial.length === 0
-	                ? "{}"
-	                : gap
-	                    ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}"
-	                    : "{" + partial.join(",") + "}";
-	            gap = mind;
-	            return v;
+	          if (way.contains(nodeIDs[1])) {
+	            n1 = nodeIDs[1];
+	          }
 	        }
-	    }
 
-	// If the JSON object does not yet have a stringify method, give it one.
+	        if (n0 && n1) {
+	          // both nodes are part of the restriction
+	          var ok = false;
 
-	    if (typeof JSON.stringify !== "function") {
-	        meta = {    // table of character substitutions
-	            "\b": "\\b",
-	            "\t": "\\t",
-	            "\n": "\\n",
-	            "\f": "\\f",
-	            "\r": "\\r",
-	            "\"": "\\\"",
-	            "\\": "\\\\"
-	        };
-	        JSON.stringify = function (value, replacer, space) {
+	          for (j = 0; j < memberWays.length; j++) {
+	            way = memberWays[j];
 
-	// The stringify method takes a value and an optional replacer, and an optional
-	// space parameter, and returns a JSON text. The replacer can be a function
-	// that can replace values, or an array of strings that will select the keys.
-	// A default replacer method can be provided. Use of the space parameter can
-	// produce text that is more easily readable.
+	            if (way.areAdjacent(n0, n1)) {
+	              ok = true;
+	              break;
+	            }
+	          }
 
-	            var i;
-	            gap = "";
-	            indent = "";
+	          if (!ok) {
+	            return 'restriction';
+	          }
+	        }
+	      } // 2b. disable if nodes being connected will destroy a member way in a restriction
+	      // (to test, make a copy and try actually connecting the nodes)
 
-	// If the space parameter is a number, make an indent string containing that
-	// many spaces.
 
-	            if (typeof space === "number") {
-	                for (i = 0; i < space; i += 1) {
-	                    indent += " ";
-	                }
+	      for (j = 0; j < memberWays.length; j++) {
+	        way = memberWays[j].update({}); // make copy
 
-	// If the space parameter is a string, it will be used as the indent string.
+	        for (k = 0; k < nodeIDs.length; k++) {
+	          if (nodeIDs[k] === survivor.id) continue;
 
-	            } else if (typeof space === "string") {
-	                indent = space;
-	            }
+	          if (way.areAdjacent(nodeIDs[k], survivor.id)) {
+	            way = way.removeNode(nodeIDs[k]);
+	          } else {
+	            way = way.replaceNode(nodeIDs[k], survivor.id);
+	          }
+	        }
 
-	// If there is a replacer, it must be a function or an array.
-	// Otherwise, throw an error.
+	        if (way.isDegenerate()) {
+	          return 'restriction';
+	        }
+	      }
+	    }
 
-	            rep = replacer;
-	            if (replacer && typeof replacer !== "function" &&
-	                    (typeof replacer !== "object" ||
-	                    typeof replacer.length !== "number")) {
-	                throw new Error("JSON.stringify");
-	            }
+	    return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
 
-	// Make a fake root object containing our value under the key of "".
-	// Return the result of stringifying the value.
+	    function hasDuplicates(n, i, arr) {
+	      return arr.indexOf(n) !== arr.lastIndexOf(n);
+	    }
 
-	            return str("", {"": value});
-	        };
+	    function keyNodeFilter(froms, tos) {
+	      return function (n) {
+	        return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
+	      };
 	    }
 
+	    function collectNodes(member, collection) {
+	      var entity = graph.hasEntity(member.id);
+	      if (!entity) return;
+	      var role = member.role || '';
 
-	// If the JSON object does not yet have a parse method, give it one.
+	      if (!collection[role]) {
+	        collection[role] = [];
+	      }
 
-	    if (typeof JSON.parse !== "function") {
-	        JSON.parse = function (text, reviver) {
+	      if (member.type === 'node') {
+	        collection[role].push(member.id);
 
-	// The parse method takes a text and an optional reviver function, and returns
-	// a JavaScript value if the text is a valid JSON text.
+	        if (role === 'via') {
+	          collection.keyfrom.push(member.id);
+	          collection.keyto.push(member.id);
+	        }
+	      } else if (member.type === 'way') {
+	        collection[role].push.apply(collection[role], entity.nodes);
 
-	            var j;
+	        if (role === 'from' || role === 'via') {
+	          collection.keyfrom.push(entity.first());
+	          collection.keyfrom.push(entity.last());
+	        }
 
-	            function walk(holder, key) {
-
-	// The walk method is used to recursively walk the resulting structure so
-	// that modifications can be made.
-
-	                var k;
-	                var v;
-	                var value = holder[key];
-	                if (value && typeof value === "object") {
-	                    for (k in value) {
-	                        if (Object.prototype.hasOwnProperty.call(value, k)) {
-	                            v = walk(value, k);
-	                            if (v !== undefined) {
-	                                value[k] = v;
-	                            } else {
-	                                delete value[k];
-	                            }
-	                        }
-	                    }
-	                }
-	                return reviver.call(holder, key, value);
-	            }
+	        if (role === 'to' || role === 'via') {
+	          collection.keyto.push(entity.first());
+	          collection.keyto.push(entity.last());
+	        }
+	      }
+	    }
+	  };
 
+	  return action;
+	}
 
-	// Parsing happens in four stages. In the first stage, we replace certain
-	// Unicode characters with escape sequences. JavaScript handles many characters
-	// incorrectly, either silently deleting them, or treating them as line endings.
+	function actionCopyEntities(ids, fromGraph) {
+	  var _copies = {};
 
-	            text = String(text);
-	            rx_dangerous.lastIndex = 0;
-	            if (rx_dangerous.test(text)) {
-	                text = text.replace(rx_dangerous, function (a) {
-	                    return "\\u" +
-	                            ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
-	                });
-	            }
+	  var action = function action(graph) {
+	    ids.forEach(function (id) {
+	      fromGraph.entity(id).copy(fromGraph, _copies);
+	    });
 
-	// In the second stage, we run the text against regular expressions that look
-	// for non-JSON patterns. We are especially concerned with "()" and "new"
-	// because they can cause invocation, and "=" because it can cause mutation.
-	// But just to be safe, we want to reject all unexpected forms.
-
-	// We split the second stage into 4 regexp operations in order to work around
-	// crippling inefficiencies in IE's and Safari's regexp engines. First we
-	// replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
-	// replace all simple value tokens with "]" characters. Third, we delete all
-	// open brackets that follow a colon or comma or that begin the text. Finally,
-	// we look to see that the remaining characters are only whitespace or "]" or
-	// "," or ":" or "{" or "}". If that is so, then the text is safe for eval.
-
-	            if (
-	                rx_one.test(
-	                    text
-	                        .replace(rx_two, "@")
-	                        .replace(rx_three, "]")
-	                        .replace(rx_four, "")
-	                )
-	            ) {
-
-	// In the third stage we use the eval function to compile the text into a
-	// JavaScript structure. The "{" operator is subject to a syntactic ambiguity
-	// in JavaScript: it can begin a block or an object literal. We wrap the text
-	// in parens to eliminate the ambiguity.
-
-	                j = eval("(" + text + ")");
-
-	// In the optional fourth stage, we recursively walk the new structure, passing
-	// each name/value pair to a reviver function for possible transformation.
-
-	                return (typeof reviver === "function")
-	                    ? walk({"": j}, "")
-	                    : j;
-	            }
+	    for (var id in _copies) {
+	      graph = graph.replace(_copies[id]);
+	    }
 
-	// If the text is not JSON parseable, then a SyntaxError is thrown.
+	    return graph;
+	  };
 
-	            throw new SyntaxError("JSON.parse");
-	        };
-	    }
-	}());
+	  action.copies = function () {
+	    return _copies;
+	  };
 
-	var json2 = json2Plugin;
+	  return action;
+	}
 
-	function json2Plugin() {
-		
-		return {}
+	function actionDeleteMember(relationId, memberIndex) {
+	  return function (graph) {
+	    var relation = graph.entity(relationId).removeMember(memberIndex);
+	    graph = graph.replace(relation);
+	    if (relation.isDegenerate()) graph = actionDeleteRelation(relation.id)(graph);
+	    return graph;
+	  };
 	}
 
-	var plugins = [json2];
+	function actionDiscardTags(difference, discardTags) {
+	  discardTags = discardTags || {};
+	  return function (graph) {
+	    difference.modified().forEach(checkTags);
+	    difference.created().forEach(checkTags);
+	    return graph;
 
-	var store_legacy = storeEngine.createStore(all, plugins);
+	    function checkTags(entity) {
+	      var keys = Object.keys(entity.tags);
+	      var didDiscard = false;
+	      var tags = {};
 
-	// # osm-auth
-	//
-	// This code is only compatible with IE10+ because the [XDomainRequest](http://bit.ly/LfO7xo)
-	// object, IE<10's idea of [CORS](http://en.wikipedia.org/wiki/Cross-origin_resource_sharing),
-	// does not support custom headers, which this uses everywhere.
-	var osmAuth = function(o) {
+	      for (var i = 0; i < keys.length; i++) {
+	        var k = keys[i];
 
-	    var oauth = {};
+	        if (discardTags[k] || !entity.tags[k]) {
+	          didDiscard = true;
+	        } else {
+	          tags[k] = entity.tags[k];
+	        }
+	      }
 
-	    // authenticated users will also have a request token secret, but it's
-	    // not used in transactions with the server
-	    oauth.authenticated = function() {
-	        return !!(token('oauth_token') && token('oauth_token_secret'));
-	    };
+	      if (didDiscard) {
+	        graph = graph.replace(entity.update({
+	          tags: tags
+	        }));
+	      }
+	    }
+	  };
+	}
 
-	    oauth.logout = function() {
-	        token('oauth_token', '');
-	        token('oauth_token_secret', '');
-	        token('oauth_request_token_secret', '');
-	        return oauth;
-	    };
+	//
+	// Optionally, disconnect only the given ways.
+	//
+	// For testing convenience, accepts an ID to assign to the (first) new node.
+	// Normally, this will be undefined and the way will automatically
+	// be assigned a new ID.
+	//
+	// This is the inverse of `iD.actionConnect`.
+	//
+	// Reference:
+	//   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
+	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
+	//
 
-	    // TODO: detect lack of click event
-	    oauth.authenticate = function(callback) {
-	        if (oauth.authenticated()) { return callback(); }
-
-	        oauth.logout();
-
-	        // ## Getting a request token
-	        var params = timenonce(getAuth(o)),
-	            url = o.url + '/oauth/request_token';
-
-	        params.oauth_signature = ohauth_1.signature(
-	            o.oauth_secret, '',
-	            ohauth_1.baseString('POST', url, params));
-
-	        if (!o.singlepage) {
-	            // Create a 600x550 popup window in the center of the screen
-	            var w = 600, h = 550,
-	                settings = [
-	                    ['width', w], ['height', h],
-	                    ['left', screen.width / 2 - w / 2],
-	                    ['top', screen.height / 2 - h / 2]].map(function(x) {
-	                        return x.join('=');
-	                    }).join(','),
-	                popup = window.open('about:blank', 'oauth_window', settings);
-	        }
-
-	        // Request a request token. When this is complete, the popup
-	        // window is redirected to OSM's authorization page.
-	        ohauth_1.xhr('POST', url, params, null, {}, reqTokenDone);
-	        o.loading();
-
-	        function reqTokenDone(err, xhr) {
-	            o.done();
-	            if (err) { return callback(err); }
-	            var resp = ohauth_1.stringQs(xhr.response);
-	            token('oauth_request_token_secret', resp.oauth_token_secret);
-	            var authorize_url = o.url + '/oauth/authorize?' + ohauth_1.qsString({
-	                oauth_token: resp.oauth_token,
-	                oauth_callback: resolveUrl$1(o.landing)
-	            });
+	function actionDisconnect(nodeId, newNodeId) {
+	  var wayIds;
+
+	  var action = function action(graph) {
+	    var node = graph.entity(nodeId);
+	    var connections = action.connections(graph);
+	    connections.forEach(function (connection) {
+	      var way = graph.entity(connection.wayID);
+	      var newNode = osmNode({
+	        id: newNodeId,
+	        loc: node.loc,
+	        tags: node.tags
+	      });
+	      graph = graph.replace(newNode);
+
+	      if (connection.index === 0 && way.isArea()) {
+	        // replace shared node with shared node..
+	        graph = graph.replace(way.replaceNode(way.nodes[0], newNode.id));
+	      } else if (way.isClosed() && connection.index === way.nodes.length - 1) {
+	        // replace closing node with new new node..
+	        graph = graph.replace(way.unclose().addNode(newNode.id));
+	      } else {
+	        // replace shared node with multiple new nodes..
+	        graph = graph.replace(way.updateNode(newNode.id, connection.index));
+	      }
+	    });
+	    return graph;
+	  };
 
-	            if (o.singlepage) {
-	                location.href = authorize_url;
-	            } else {
-	                popup.location = authorize_url;
-	            }
-	        }
+	  action.connections = function (graph) {
+	    var candidates = [];
+	    var keeping = false;
+	    var parentWays = graph.parentWays(graph.entity(nodeId));
+	    var way, waynode;
 
-	        // Called by a function in a landing page, in the popup window. The
-	        // window closes itself.
-	        window.authComplete = function(token) {
-	            var oauth_token = ohauth_1.stringQs(token.split('?')[1]);
-	            get_access_token(oauth_token.oauth_token);
-	            delete window.authComplete;
-	        };
+	    for (var i = 0; i < parentWays.length; i++) {
+	      way = parentWays[i];
 
-	        // ## Getting an request token
-	        //
-	        // At this point we have an `oauth_token`, brought in from a function
-	        // call on a landing page popup.
-	        function get_access_token(oauth_token) {
-	            var url = o.url + '/oauth/access_token',
-	                params = timenonce(getAuth(o)),
-	                request_token_secret = token('oauth_request_token_secret');
-	            params.oauth_token = oauth_token;
-	            params.oauth_signature = ohauth_1.signature(
-	                o.oauth_secret,
-	                request_token_secret,
-	                ohauth_1.baseString('POST', url, params));
-
-	            // ## Getting an access token
-	            //
-	            // The final token required for authentication. At this point
-	            // we have a `request token secret`
-	            ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-	            o.loading();
-	        }
-
-	        function accessTokenDone(err, xhr) {
-	            o.done();
-	            if (err) { return callback(err); }
-	            var access_token = ohauth_1.stringQs(xhr.response);
-	            token('oauth_token', access_token.oauth_token);
-	            token('oauth_token_secret', access_token.oauth_token_secret);
-	            callback(null, oauth);
-	        }
-	    };
+	      if (wayIds && wayIds.indexOf(way.id) === -1) {
+	        keeping = true;
+	        continue;
+	      }
 
-	    oauth.bootstrapToken = function(oauth_token, callback) {
-	        // ## Getting an request token
-	        // At this point we have an `oauth_token`, brought in from a function
-	        // call on a landing page popup.
-	        function get_access_token(oauth_token) {
-	            var url = o.url + '/oauth/access_token',
-	                params = timenonce(getAuth(o)),
-	                request_token_secret = token('oauth_request_token_secret');
-	            params.oauth_token = oauth_token;
-	            params.oauth_signature = ohauth_1.signature(
-	                o.oauth_secret,
-	                request_token_secret,
-	                ohauth_1.baseString('POST', url, params));
-
-	            // ## Getting an access token
-	            // The final token required for authentication. At this point
-	            // we have a `request token secret`
-	            ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-	            o.loading();
-	        }
-
-	        function accessTokenDone(err, xhr) {
-	            o.done();
-	            if (err) { return callback(err); }
-	            var access_token = ohauth_1.stringQs(xhr.response);
-	            token('oauth_token', access_token.oauth_token);
-	            token('oauth_token_secret', access_token.oauth_token_secret);
-	            callback(null, oauth);
-	        }
-
-	        get_access_token(oauth_token);
-	    };
+	      if (way.isArea() && way.nodes[0] === nodeId) {
+	        candidates.push({
+	          wayID: way.id,
+	          index: 0
+	        });
+	      } else {
+	        for (var j = 0; j < way.nodes.length; j++) {
+	          waynode = way.nodes[j];
 
-	    // # xhr
-	    //
-	    // A single XMLHttpRequest wrapper that does authenticated calls if the
-	    // user has logged in.
-	    oauth.xhr = function(options, callback) {
-	        if (!oauth.authenticated()) {
-	            if (o.auto) {
-	                return oauth.authenticate(run);
-	            } else {
-	                callback('not authenticated', null);
-	                return;
-	            }
-	        } else {
-	            return run();
-	        }
-
-	        function run() {
-	            var params = timenonce(getAuth(o)),
-	                oauth_token_secret = token('oauth_token_secret'),
-	                url = (options.prefix !== false) ? o.url + options.path : options.path,
-	                url_parts = url.replace(/#.*$/, '').split('?', 2),
-	                base_url = url_parts[0],
-	                query = (url_parts.length === 2) ? url_parts[1] : '';
-
-	            // https://tools.ietf.org/html/rfc5849#section-3.4.1.3.1
-	            if ((!options.options || !options.options.header ||
-	                options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') &&
-	                options.content) {
-	                params = immutable(params, ohauth_1.stringQs(options.content));
+	          if (waynode === nodeId) {
+	            if (way.isClosed() && parentWays.length > 1 && wayIds && wayIds.indexOf(way.id) !== -1 && j === way.nodes.length - 1) {
+	              continue;
 	            }
 
-	            params.oauth_token = token('oauth_token');
-	            params.oauth_signature = ohauth_1.signature(
-	                o.oauth_secret,
-	                oauth_token_secret,
-	                ohauth_1.baseString(options.method, base_url, immutable(params, ohauth_1.stringQs(query)))
-	            );
-
-	            return ohauth_1.xhr(options.method, url, params, options.content, options.options, done);
-	        }
-
-	        function done(err, xhr) {
-	            if (err) { return callback(err); }
-	            else if (xhr.responseXML) { return callback(err, xhr.responseXML); }
-	            else { return callback(err, xhr.response); }
+	            candidates.push({
+	              wayID: way.id,
+	              index: j
+	            });
+	          }
 	        }
-	    };
-
-	    // pre-authorize this object, if we can just get a token and token_secret
-	    // from the start
-	    oauth.preauth = function(c) {
-	        if (!c) { return; }
-	        if (c.oauth_token) { token('oauth_token', c.oauth_token); }
-	        if (c.oauth_token_secret) { token('oauth_token_secret', c.oauth_token_secret); }
-	        return oauth;
-	    };
+	      }
+	    }
 
-	    oauth.options = function(_) {
-	        if (!arguments.length) { return o; }
+	    return keeping ? candidates : candidates.slice(1);
+	  };
 
-	        o = _;
-	        o.url = o.url || 'https://www.openstreetmap.org';
-	        o.landing = o.landing || 'land.html';
-	        o.singlepage = o.singlepage || false;
+	  action.disabled = function (graph) {
+	    var connections = action.connections(graph);
+	    if (connections.length === 0) return 'not_connected';
+	    var parentWays = graph.parentWays(graph.entity(nodeId));
+	    var seenRelationIds = {};
+	    var sharedRelation;
+	    parentWays.forEach(function (way) {
+	      var relations = graph.parentRelations(way);
+	      relations.forEach(function (relation) {
+	        if (relation.id in seenRelationIds) {
+	          if (wayIds) {
+	            if (wayIds.indexOf(way.id) !== -1 || wayIds.indexOf(seenRelationIds[relation.id]) !== -1) {
+	              sharedRelation = relation;
+	            }
+	          } else {
+	            sharedRelation = relation;
+	          }
+	        } else {
+	          seenRelationIds[relation.id] = way.id;
+	        }
+	      });
+	    });
+	    if (sharedRelation) return 'relation';
+	  };
 
-	        // Optional loading and loading-done functions for nice UI feedback.
-	        // by default, no-ops
-	        o.loading = o.loading || function() {};
-	        o.done = o.done || function() {};
+	  action.limitWays = function (val) {
+	    if (!arguments.length) return wayIds;
+	    wayIds = val;
+	    return action;
+	  };
 
-	        return oauth.preauth(o);
-	    };
+	  return action;
+	}
 
-	    // 'stamp' an authentication object from `getAuth()`
-	    // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
-	    // and timestamp
-	    function timenonce(o) {
-	        o.oauth_timestamp = ohauth_1.timestamp();
-	        o.oauth_nonce = ohauth_1.nonce();
-	        return o;
-	    }
+	function actionExtract(entityID) {
+	  var extractedNodeID;
 
-	    // get/set tokens. These are prefixed with the base URL so that `osm-auth`
-	    // can be used with multiple APIs and the keys in `localStorage`
-	    // will not clash
-	    var token;
+	  var action = function action(graph) {
+	    var entity = graph.entity(entityID);
 
-	    if (store_legacy.enabled) {
-	        token = function (x, y) {
-	            if (arguments.length === 1) { return store_legacy.get(o.url + x); }
-	            else if (arguments.length === 2) { return store_legacy.set(o.url + x, y); }
-	        };
-	    } else {
-	        var storage = {};
-	        token = function (x, y) {
-	            if (arguments.length === 1) { return storage[o.url + x]; }
-	            else if (arguments.length === 2) { return storage[o.url + x] = y; }
-	        };
+	    if (entity.type === 'node') {
+	      return extractFromNode(entity, graph);
 	    }
 
-	    // Get an authentication object. If you just add and remove properties
-	    // from a single object, you'll need to use `delete` to make sure that
-	    // it doesn't contain undesired properties for authentication
-	    function getAuth(o) {
-	        return {
-	            oauth_consumer_key: o.oauth_consumer_key,
-	            oauth_signature_method: 'HMAC-SHA1'
-	        };
-	    }
+	    return extractFromWayOrRelation(entity, graph);
+	  };
 
-	    // potentially pre-authorize
-	    oauth.options(o);
+	  function extractFromNode(node, graph) {
+	    extractedNodeID = node.id; // Create a new node to replace the one we will detach
 
-	    return oauth;
-	};
+	    var replacement = osmNode({
+	      loc: node.loc
+	    });
+	    graph = graph.replace(replacement); // Process each way in turn, updating the graph as we go
 
-	var JXON = new (function () {
-	  var
-	    sValueProp = 'keyValue', sAttributesProp = 'keyAttributes', sAttrPref = '@', /* you can customize these values */
-	    aCache = [], rIsNull = /^\s*$/, rIsBool = /^(?:true|false)$/i;
+	    graph = graph.parentWays(node).reduce(function (accGraph, parentWay) {
+	      return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
+	    }, graph); // Process any relations too
 
-	  function parseText (sValue) {
-	    if (rIsNull.test(sValue)) { return null; }
-	    if (rIsBool.test(sValue)) { return sValue.toLowerCase() === 'true'; }
-	    if (isFinite(sValue)) { return parseFloat(sValue); }
-	    if (isFinite(Date.parse(sValue))) { return new Date(sValue); }
-	    return sValue;
+	    return graph.parentRelations(node).reduce(function (accGraph, parentRel) {
+	      return accGraph.replace(parentRel.replaceMember(node, replacement));
+	    }, graph);
 	  }
 
-	  function EmptyTree () { }
-	  EmptyTree.prototype.toString = function () { return 'null'; };
-	  EmptyTree.prototype.valueOf = function () { return null; };
+	  function extractFromWayOrRelation(entity, graph) {
+	    var fromGeometry = entity.geometry(graph);
+	    var keysToCopyAndRetain = ['source', 'wheelchair'];
+	    var keysToRetain = ['area'];
+	    var buildingKeysToRetain = ['architect', 'building', 'height', 'layer'];
+	    var extractedLoc = d3_geoCentroid(entity.asGeoJSON(graph));
 
-	  function objectify (vValue) {
-	    return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
-	  }
+	    if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
+	      extractedLoc = entity.extent(graph).center();
+	    }
 
-	  function createObjTree (oParentNode, nVerb, bFreeze, bNesteAttr) {
-	    var
-	      nLevelStart = aCache.length, bChildren = oParentNode.hasChildNodes(),
-	      bAttributes = oParentNode.hasAttributes(), bHighVerb = Boolean(nVerb & 2);
+	    var indoorAreaValues = {
+	      area: true,
+	      corridor: true,
+	      elevator: true,
+	      level: true,
+	      room: true
+	    };
+	    var isBuilding = entity.tags.building && entity.tags.building !== 'no' || entity.tags['building:part'] && entity.tags['building:part'] !== 'no';
+	    var isIndoorArea = fromGeometry === 'area' && entity.tags.indoor && indoorAreaValues[entity.tags.indoor];
+	    var entityTags = Object.assign({}, entity.tags); // shallow copy
 
-	    var
-	      sProp, vContent, nLength = 0, sCollectedTxt = '',
-	      vResult = bHighVerb ? {} : /* put here the default value for empty nodes: */ true;
+	    var pointTags = {};
 
-	    if (bChildren) {
-	      for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
-	        oNode = oParentNode.childNodes.item(nItem);
-	        if (oNode.nodeType === 4) { sCollectedTxt += oNode.nodeValue; } /* nodeType is 'CDATASection' (4) */
-	        else if (oNode.nodeType === 3) { sCollectedTxt += oNode.nodeValue.trim(); } /* nodeType is 'Text' (3) */
-	        else if (oNode.nodeType === 1 && !oNode.prefix) { aCache.push(oNode); } /* nodeType is 'Element' (1) */
+	    for (var key in entityTags) {
+	      if (entity.type === 'relation' && key === 'type') {
+	        continue;
 	      }
-	    }
-
-	    var nLevelEnd = aCache.length, vBuiltVal = parseText(sCollectedTxt);
 
-	    if (!bHighVerb && (bChildren || bAttributes)) { vResult = nVerb === 0 ? objectify(vBuiltVal) : {}; }
-
-	    for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
-	      sProp = aCache[nElId].nodeName.toLowerCase();
-	      vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
-	      if (vResult.hasOwnProperty(sProp)) {
-	        if (vResult[sProp].constructor !== Array) { vResult[sProp] = [vResult[sProp]]; }
-	        vResult[sProp].push(vContent);
-	      } else {
-	        vResult[sProp] = vContent;
-	        nLength++;
+	      if (keysToRetain.indexOf(key) !== -1) {
+	        continue;
 	      }
-	    }
 
-	    if (bAttributes) {
-	      var
-	        nAttrLen = oParentNode.attributes.length,
-	        sAPrefix = bNesteAttr ? '' : sAttrPref, oAttrParent = bNesteAttr ? {} : vResult;
+	      if (isBuilding) {
+	        // don't transfer building-related tags
+	        if (buildingKeysToRetain.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+	      } // leave `indoor` tag on the area
 
-	      for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
-	        oAttrib = oParentNode.attributes.item(nAttrib);
-	        oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
-	      }
 
-	      if (bNesteAttr) {
-	        if (bFreeze) { Object.freeze(oAttrParent); }
-	        vResult[sAttributesProp] = oAttrParent;
-	        nLength -= nAttrLen - 1;
-	      }
-	    }
+	      if (isIndoorArea && key === 'indoor') {
+	        continue;
+	      } // copy the tag from the entity to the point
 
-	    if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
-	      vResult[sValueProp] = vBuiltVal;
-	    } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
-	      vResult = vBuiltVal;
-	    }
 
-	    if (bFreeze && (bHighVerb || nLength > 0)) { Object.freeze(vResult); }
+	      pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features
 
-	    aCache.length = nLevelStart;
+	      if (keysToCopyAndRetain.indexOf(key) !== -1 || key.match(/^addr:.{1,}/)) {
+	        continue;
+	      } else if (isIndoorArea && key === 'level') {
+	        // leave `level` on both features
+	        continue;
+	      } // remove the tag from the entity
 
-	    return vResult;
-	  }
 
-	  function loadObjTree (oXMLDoc, oParentEl, oParentObj) {
-	    var vValue, oChild;
+	      delete entityTags[key];
+	    }
 
-	    if (oParentObj instanceof String || oParentObj instanceof Number || oParentObj instanceof Boolean) {
-	      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toString())); /* verbosity level is 0 */
-	    } else if (oParentObj.constructor === Date) {
-	      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toGMTString()));    
+	    if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
+	      // ensure that areas keep area geometry
+	      entityTags.area = 'yes';
 	    }
 
-	    for (var sName in oParentObj) {
-	      vValue = oParentObj[sName];
-	      if (isFinite(sName) || vValue instanceof Function) { continue; } /* verbosity level is 0 */
-	      if (sName === sValueProp) {
-	        if (vValue !== null && vValue !== true) { oParentEl.appendChild(oXMLDoc.createTextNode(vValue.constructor === Date ? vValue.toGMTString() : String(vValue))); }
-	      } else if (sName === sAttributesProp) { /* verbosity level is 3 */
-	        for (var sAttrib in vValue) { oParentEl.setAttribute(sAttrib, vValue[sAttrib]); }
-	      } else if (sName.charAt(0) === sAttrPref) {
-	        oParentEl.setAttribute(sName.slice(1), vValue);
-	      } else if (vValue.constructor === Array) {
-	        for (var nItem = 0; nItem < vValue.length; nItem++) {
-	          oChild = oXMLDoc.createElement(sName);
-	          loadObjTree(oXMLDoc, oChild, vValue[nItem]);
-	          oParentEl.appendChild(oChild);
-	        }
-	      } else {
-	        oChild = oXMLDoc.createElement(sName);
-	        if (vValue instanceof Object) {
-	          loadObjTree(oXMLDoc, oChild, vValue);
-	        } else if (vValue !== null && vValue !== true) {
-	          oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
-	        }
-	        oParentEl.appendChild(oChild);
-	     }
-	   }
+	    var replacement = osmNode({
+	      loc: extractedLoc,
+	      tags: pointTags
+	    });
+	    graph = graph.replace(replacement);
+	    extractedNodeID = replacement.id;
+	    return graph.replace(entity.update({
+	      tags: entityTags
+	    }));
 	  }
 
-	  this.build = function (oXMLParent, nVerbosity /* optional */, bFreeze /* optional */, bNesteAttributes /* optional */) {
-	    var _nVerb = arguments.length > 1 && typeof nVerbosity === 'number' ? nVerbosity & 3 : /* put here the default verbosity level: */ 1;
-	    return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);    
+	  action.getExtractedNodeID = function () {
+	    return extractedNodeID;
 	  };
 
-	  this.unbuild = function (oObjTree) {    
-	    var oNewDoc = document.implementation.createDocument('', '', null);
-	    loadObjTree(oNewDoc, oNewDoc, oObjTree);
-	    return oNewDoc;
-	  };
+	  return action;
+	}
 
-	  this.stringify = function (oObjTree) {
-	    return (new XMLSerializer()).serializeToString(JXON.unbuild(oObjTree));
-	  };
-	})();
+	//
+	// This is the inverse of `iD.actionSplit`.
+	//
+	// Reference:
+	//   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
+	//   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
+	//
 
-	// var myObject = JXON.build(doc);
-	// we got our javascript object! try: alert(JSON.stringify(myObject));
+	function actionJoin(ids) {
+	  function groupEntitiesByGeometry(graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    return Object.assign({
+	      line: []
+	    }, utilArrayGroupBy(entities, function (entity) {
+	      return entity.geometry(graph);
+	    }));
+	  }
+
+	  var action = function action(graph) {
+	    var ways = ids.map(graph.entity, graph);
+	    var survivorID = ways[0].id; // if any of the ways are sided (e.g. coastline, cliff, kerb)
+	    // sort them first so they establish the overall order - #6033
+
+	    ways.sort(function (a, b) {
+	      var aSided = a.isSided();
+	      var bSided = b.isSided();
+	      return aSided && !bSided ? -1 : bSided && !aSided ? 1 : 0;
+	    }); // Prefer to keep an existing way.
+
+	    for (var i = 0; i < ways.length; i++) {
+	      if (!ways[i].isNew()) {
+	        survivorID = ways[i].id;
+	        break;
+	      }
+	    }
 
-	// var newDoc = JXON.unbuild(myObject);
-	// we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc));
+	    var sequences = osmJoinWays(ways, graph);
+	    var joined = sequences[0]; // We might need to reverse some of these ways before joining them.  #4688
+	    // `joined.actions` property will contain any actions we need to apply.
 
-	var tiler$5 = utilTiler();
-	var dispatch$6 = dispatch('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
-	var urlroot = 'https://www.openstreetmap.org';
-	var oauth = osmAuth({
-	    url: urlroot,
-	    oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
-	    oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
-	    loading: authLoading,
-	    done: authDone
-	});
+	    graph = sequences.actions.reduce(function (g, action) {
+	      return action(g);
+	    }, graph);
+	    var survivor = graph.entity(survivorID);
+	    survivor = survivor.update({
+	      nodes: joined.nodes.map(function (n) {
+	        return n.id;
+	      })
+	    });
+	    graph = graph.replace(survivor);
+	    joined.forEach(function (way) {
+	      if (way.id === survivorID) return;
+	      graph.parentRelations(way).forEach(function (parent) {
+	        graph = graph.replace(parent.replaceMember(way, survivor));
+	      });
+	      survivor = survivor.mergeTags(way.tags);
+	      graph = graph.replace(survivor);
+	      graph = actionDeleteWay(way.id)(graph);
+	    }); // Finds if the join created a single-member multipolygon,
+	    // and if so turns it into a basic area instead
+
+	    function checkForSimpleMultipolygon() {
+	      if (!survivor.isClosed()) return;
+	      var multipolygons = graph.parentMultipolygons(survivor).filter(function (multipolygon) {
+	        // find multipolygons where the survivor is the only member
+	        return multipolygon.members.length === 1;
+	      }); // skip if this is the single member of multiple multipolygons
+
+	      if (multipolygons.length !== 1) return;
+	      var multipolygon = multipolygons[0];
+
+	      for (var key in survivor.tags) {
+	        if (multipolygon.tags[key] && // don't collapse if tags cannot be cleanly merged
+	        multipolygon.tags[key] !== survivor.tags[key]) return;
+	      }
 
-	var _blacklists = ['.*\.google(apis)?\..*/(vt|kh)[\?/].*([xyz]=.*){3}.*'];
-	var _tileCache = { toLoad: {}, loaded: {}, inflight: {}, seen: {}, rtree: new RBush() };
-	var _noteCache = { toLoad: {}, loaded: {}, inflight: {}, inflightPost: {}, note: {}, closed: {}, rtree: new RBush() };
-	var _userCache = { toLoad: {}, user: {} };
-	var _cachedApiStatus;
-	var _changeset = {};
+	      survivor = survivor.mergeTags(multipolygon.tags);
+	      graph = graph.replace(survivor);
+	      graph = actionDeleteRelation(multipolygon.id, true
+	      /* allow untagged members */
+	      )(graph);
+	      var tags = Object.assign({}, survivor.tags);
 
-	var _deferred = new Set();
-	var _connectionID = 1;
-	var _tileZoom$3 = 16;
-	var _noteZoom = 12;
-	var _rateLimitError;
-	var _userChangesets;
-	var _userDetails;
-	var _off;
+	      if (survivor.geometry(graph) !== 'area') {
+	        // ensure the feature persists as an area
+	        tags.area = 'yes';
+	      }
 
-	// set a default but also load this from the API status
-	var _maxWayNodes = 2000;
+	      delete tags.type; // remove type=multipolygon
 
+	      survivor = survivor.update({
+	        tags: tags
+	      });
+	      graph = graph.replace(survivor);
+	    }
 
-	function authLoading() {
-	    dispatch$6.call('authLoading');
-	}
+	    checkForSimpleMultipolygon();
+	    return graph;
+	  }; // Returns the number of nodes the resultant way is expected to have
 
 
-	function authDone() {
-	    dispatch$6.call('authDone');
-	}
+	  action.resultingWayNodesLength = function (graph) {
+	    return ids.reduce(function (count, id) {
+	      return count + graph.entity(id).nodes.length;
+	    }, 0) - ids.length - 1;
+	  };
 
+	  action.disabled = function (graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
 
-	function abortRequest$5(controllerOrXHR) {
-	    if (controllerOrXHR) {
-	        controllerOrXHR.abort();
+	    if (ids.length < 2 || ids.length !== geometries.line.length) {
+	      return 'not_eligible';
 	    }
-	}
 
+	    var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
 
-	function hasInflightRequests(cache) {
-	    return Object.keys(cache.inflight).length;
-	}
+	    if (joined.length > 1) {
+	      return 'not_adjacent';
+	    } // Loop through all combinations of path-pairs
+	    // to check potential intersections between all pairs
 
 
-	function abortUnwantedRequests$3(cache, visibleTiles) {
-	    Object.keys(cache.inflight).forEach(function(k) {
-	        if (cache.toLoad[k]) { return; }
-	        if (visibleTiles.find(function(tile) { return k === tile.id; })) { return; }
+	    for (var i = 0; i < ids.length - 1; i++) {
+	      for (var j = i + 1; j < ids.length; j++) {
+	        var path1 = graph.childNodes(graph.entity(ids[i])).map(function (e) {
+	          return e.loc;
+	        });
+	        var path2 = graph.childNodes(graph.entity(ids[j])).map(function (e) {
+	          return e.loc;
+	        });
+	        var intersections = geoPathIntersections(path1, path2); // Check if intersections are just nodes lying on top of
+	        // each other/the line, as opposed to crossing it
 
-	        abortRequest$5(cache.inflight[k]);
-	        delete cache.inflight[k];
-	    });
-	}
+	        var common = utilArrayIntersection(joined[0].nodes.map(function (n) {
+	          return n.loc.toString();
+	        }), intersections.map(function (n) {
+	          return n.toString();
+	        }));
 
+	        if (common.length !== intersections.length) {
+	          return 'paths_intersect';
+	        }
+	      }
+	    }
 
-	function getLoc(attrs) {
-	    var lon = attrs.lon && attrs.lon.value;
-	    var lat = attrs.lat && attrs.lat.value;
-	    return [parseFloat(lon), parseFloat(lat)];
-	}
+	    var nodeIds = joined[0].nodes.map(function (n) {
+	      return n.id;
+	    }).slice(1, -1);
+	    var relation;
+	    var tags = {};
+	    var conflicting = false;
+	    joined[0].forEach(function (way) {
+	      var parents = graph.parentRelations(way);
+	      parents.forEach(function (parent) {
+	        if (parent.isRestriction() && parent.members.some(function (m) {
+	          return nodeIds.indexOf(m.id) >= 0;
+	        })) {
+	          relation = parent;
+	        }
+	      });
 
+	      for (var k in way.tags) {
+	        if (!(k in tags)) {
+	          tags[k] = way.tags[k];
+	        } else if (tags[k] && osmIsInterestingTag(k) && tags[k] !== way.tags[k]) {
+	          conflicting = true;
+	        }
+	      }
+	    });
 
-	function getNodes(obj) {
-	    var elems = obj.getElementsByTagName('nd');
-	    var nodes = new Array(elems.length);
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        nodes[i] = 'n' + elems[i].attributes.ref.value;
+	    if (relation) {
+	      return 'restriction';
 	    }
-	    return nodes;
-	}
 
-	function getNodesJSON(obj) {
-	    var elems = obj.nodes;
-	    var nodes = new Array(elems.length);
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        nodes[i] = 'n' + elems[i];
+	    if (conflicting) {
+	      return 'conflicting_tags';
 	    }
-	    return nodes;
+	  };
+
+	  return action;
 	}
 
-	function getTags(obj) {
-	    var elems = obj.getElementsByTagName('tag');
-	    var tags = {};
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        var attrs = elems[i].attributes;
-	        tags[attrs.k.value] = attrs.v.value;
-	    }
+	function actionMerge(ids) {
+	  function groupEntitiesByGeometry(graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    return Object.assign({
+	      point: [],
+	      area: [],
+	      line: [],
+	      relation: []
+	    }, utilArrayGroupBy(entities, function (entity) {
+	      return entity.geometry(graph);
+	    }));
+	  }
+
+	  var action = function action(graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
+	    var target = geometries.area[0] || geometries.line[0];
+	    var points = geometries.point;
+	    points.forEach(function (point) {
+	      target = target.mergeTags(point.tags);
+	      graph = graph.replace(target);
+	      graph.parentRelations(point).forEach(function (parent) {
+	        graph = graph.replace(parent.replaceMember(point, target));
+	      });
+	      var nodes = utilArrayUniq(graph.childNodes(target));
+	      var removeNode = point;
 
-	    return tags;
-	}
+	      for (var i = 0; i < nodes.length; i++) {
+	        var node = nodes[i];
 
+	        if (graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags()) {
+	          continue;
+	        } // Found an uninteresting child node on the target way.
+	        // Move orig point into its place to preserve point's history. #3683
 
-	function getMembers(obj) {
-	    var elems = obj.getElementsByTagName('member');
-	    var members = new Array(elems.length);
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        var attrs = elems[i].attributes;
-	        members[i] = {
-	            id: attrs.type.value[0] + attrs.ref.value,
-	            type: attrs.type.value,
-	            role: attrs.role.value
-	        };
-	    }
-	    return members;
-	}
 
-	function getMembersJSON(obj) {
-	    var elems = obj.members;
-	    var members = new Array(elems.length);
-	    for (var i = 0, l = elems.length; i < l; i++) {
-	        var attrs = elems[i];
-	        members[i] = {
-	            id: attrs.type[0] + attrs.ref,
-	            type: attrs.type,
-	            role: attrs.role
-	        };
-	    }
-	    return members;
-	}
+	        graph = graph.replace(point.update({
+	          tags: {},
+	          loc: node.loc
+	        }));
+	        target = target.replaceNode(node.id, point.id);
+	        graph = graph.replace(target);
+	        removeNode = node;
+	        break;
+	      }
 
-	function getVisible(attrs) {
-	    return (!attrs.visible || attrs.visible.value !== 'false');
-	}
+	      graph = graph.remove(removeNode);
+	    });
 
+	    if (target.tags.area === 'yes') {
+	      var tags = Object.assign({}, target.tags); // shallow copy
 
-	function parseComments(comments) {
-	    var parsedComments = [];
-
-	    // for each comment
-	    for (var i = 0; i < comments.length; i++) {
-	        var comment = comments[i];
-	        if (comment.nodeName === 'comment') {
-	            var childNodes = comment.childNodes;
-	            var parsedComment = {};
-
-	            for (var j = 0; j < childNodes.length; j++) {
-	                var node = childNodes[j];
-	                var nodeName = node.nodeName;
-	                if (nodeName === '#text') { continue; }
-	                parsedComment[nodeName] = node.textContent;
-
-	                if (nodeName === 'uid') {
-	                    var uid = node.textContent;
-	                    if (uid && !_userCache.user[uid]) {
-	                        _userCache.toLoad[uid] = true;
-	                    }
-	                }
-	            }
+	      delete tags.area;
 
-	            if (parsedComment) {
-	                parsedComments.push(parsedComment);
-	            }
-	        }
+	      if (osmTagSuggestingArea(tags)) {
+	        // remove the `area` tag if area geometry is now implied - #3851
+	        target = target.update({
+	          tags: tags
+	        });
+	        graph = graph.replace(target);
+	      }
 	    }
-	    return parsedComments;
-	}
 
+	    return graph;
+	  };
 
-	function encodeNoteRtree(note) {
-	    return {
-	        minX: note.loc[0],
-	        minY: note.loc[1],
-	        maxX: note.loc[0],
-	        maxY: note.loc[1],
-	        data: note
-	    };
-	}
+	  action.disabled = function (graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
 
+	    if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
+	      return 'not_eligible';
+	    }
+	  };
 
-	var jsonparsers = {
+	  return action;
+	}
 
-	    node: function nodeData(obj, uid) {
-	        return new osmNode({
-	            id:  uid,
-	            visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-	            version: obj.version.toString(),
-	            changeset: obj.changeset.toString(),
-	            timestamp: obj.timestamp,
-	            user: obj.user,
-	            uid: obj.uid.toString(),
-	            loc: [parseFloat(obj.lon), parseFloat(obj.lat)],
-	            tags: obj.tags
-	        });
-	    },
+	//
+	// 1. move all the nodes to a common location
+	// 2. `actionConnect` them
 
-	    way: function wayData(obj, uid) {
-	        return new osmWay({
-	            id:  uid,
-	            visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-	            version: obj.version.toString(),
-	            changeset: obj.changeset.toString(),
-	            timestamp: obj.timestamp,
-	            user: obj.user,
-	            uid: obj.uid.toString(),
-	            tags: obj.tags,
-	            nodes: getNodesJSON(obj)
-	        });
-	    },
+	function actionMergeNodes(nodeIDs, loc) {
+	  // If there is a single "interesting" node, use that as the location.
+	  // Otherwise return the average location of all the nodes.
+	  function chooseLoc(graph) {
+	    if (!nodeIDs.length) return null;
+	    var sum = [0, 0];
+	    var interestingCount = 0;
+	    var interestingLoc;
+
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var node = graph.entity(nodeIDs[i]);
+
+	      if (node.hasInterestingTags()) {
+	        interestingLoc = ++interestingCount === 1 ? node.loc : null;
+	      }
 
-	    relation: function relationData(obj, uid) {
-	        return new osmRelation({
-	            id:  uid,
-	            visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-	            version: obj.version.toString(),
-	            changeset: obj.changeset.toString(),
-	            timestamp: obj.timestamp,
-	            user: obj.user,
-	            uid: obj.uid.toString(),
-	            tags: obj.tags,
-	            members: getMembersJSON(obj)
-	        });
+	      sum = geoVecAdd(sum, node.loc);
 	    }
-	};
 
-	function parseJSON(payload, callback, options) {
-	    options = Object.assign({ skipSeen: true }, options);
-	    if (!payload)  {
-	        return callback({ message: 'No JSON', status: -1 });
+	    return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
+	  }
+
+	  var action = function action(graph) {
+	    if (nodeIDs.length < 2) return graph;
+	    var toLoc = loc;
+
+	    if (!toLoc) {
+	      toLoc = chooseLoc(graph);
 	    }
 
-	    var json = payload;
-	    if (typeof json !== 'object')
-	       { json = JSON.parse(payload); }
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var node = graph.entity(nodeIDs[i]);
 
-	    if (!json.elements)
-	        { return callback({ message: 'No JSON', status: -1 }); }
+	      if (node.loc !== toLoc) {
+	        graph = graph.replace(node.move(toLoc));
+	      }
+	    }
 
-	    var children = json.elements;
+	    return actionConnect(nodeIDs)(graph);
+	  };
 
-	    var handle = window.requestIdleCallback(function() {
-	        var results = [];
-	        var result;
-	        for (var i = 0; i < children.length; i++) {
-	            result = parseChild(children[i]);
-	            if (result) { results.push(result); }
-	        }
-	        callback(null, results);
-	    });
+	  action.disabled = function (graph) {
+	    if (nodeIDs.length < 2) return 'not_eligible';
 
-	    _deferred.add(handle);
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var entity = graph.entity(nodeIDs[i]);
+	      if (entity.type !== 'node') return 'not_eligible';
+	    }
 
-	    function parseChild(child) {
-	        var parser = jsonparsers[child.type];
-	        if (!parser) { return null; }
+	    return actionConnect(nodeIDs).disabled(graph);
+	  };
 
-	        var uid;
+	  return action;
+	}
 
-	        uid = osmEntity.id.fromOSM(child.type, child.id);
-	        if (options.skipSeen) {
-	            if (_tileCache.seen[uid]) { return null; }  // avoid reparsing a "seen" entity
-	            _tileCache.seen[uid] = true;
+	function osmChangeset() {
+	  if (!(this instanceof osmChangeset)) {
+	    return new osmChangeset().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
+	}
+	osmEntity.changeset = osmChangeset;
+	osmChangeset.prototype = Object.create(osmEntity.prototype);
+	Object.assign(osmChangeset.prototype, {
+	  type: 'changeset',
+	  extent: function extent() {
+	    return new geoExtent();
+	  },
+	  geometry: function geometry() {
+	    return 'changeset';
+	  },
+	  asJXON: function asJXON() {
+	    return {
+	      osm: {
+	        changeset: {
+	          tag: Object.keys(this.tags).map(function (k) {
+	            return {
+	              '@k': k,
+	              '@v': this.tags[k]
+	            };
+	          }, this),
+	          '@version': 0.6,
+	          '@generator': 'iD'
 	        }
+	      }
+	    };
+	  },
+	  // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
+	  // XML. Returns a string.
+	  osmChangeJXON: function osmChangeJXON(changes) {
+	    var changeset_id = this.id;
+
+	    function nest(x, order) {
+	      var groups = {};
+
+	      for (var i = 0; i < x.length; i++) {
+	        var tagName = Object.keys(x[i])[0];
+	        if (!groups[tagName]) groups[tagName] = [];
+	        groups[tagName].push(x[i][tagName]);
+	      }
 
-	        return parser(child, uid);
-	    }
-	}
+	      var ordered = {};
+	      order.forEach(function (o) {
+	        if (groups[o]) ordered[o] = groups[o];
+	      });
+	      return ordered;
+	    } // sort relations in a changeset by dependencies
 
-	var parsers = {
-	    node: function nodeData(obj, uid) {
-	        var attrs = obj.attributes;
-	        return new osmNode({
-	            id: uid,
-	            visible: getVisible(attrs),
-	            version: attrs.version.value,
-	            changeset: attrs.changeset && attrs.changeset.value,
-	            timestamp: attrs.timestamp && attrs.timestamp.value,
-	            user: attrs.user && attrs.user.value,
-	            uid: attrs.uid && attrs.uid.value,
-	            loc: getLoc(attrs),
-	            tags: getTags(obj)
-	        });
-	    },
 
-	    way: function wayData(obj, uid) {
-	        var attrs = obj.attributes;
-	        return new osmWay({
-	            id: uid,
-	            visible: getVisible(attrs),
-	            version: attrs.version.value,
-	            changeset: attrs.changeset && attrs.changeset.value,
-	            timestamp: attrs.timestamp && attrs.timestamp.value,
-	            user: attrs.user && attrs.user.value,
-	            uid: attrs.uid && attrs.uid.value,
-	            tags: getTags(obj),
-	            nodes: getNodes(obj),
+	    function sort(changes) {
+	      // find a referenced relation in the current changeset
+	      function resolve(item) {
+	        return relations.find(function (relation) {
+	          return item.keyAttributes.type === 'relation' && item.keyAttributes.ref === relation['@id'];
 	        });
-	    },
+	      } // a new item is an item that has not been already processed
 
-	    relation: function relationData(obj, uid) {
-	        var attrs = obj.attributes;
-	        return new osmRelation({
-	            id: uid,
-	            visible: getVisible(attrs),
-	            version: attrs.version.value,
-	            changeset: attrs.changeset && attrs.changeset.value,
-	            timestamp: attrs.timestamp && attrs.timestamp.value,
-	            user: attrs.user && attrs.user.value,
-	            uid: attrs.uid && attrs.uid.value,
-	            tags: getTags(obj),
-	            members: getMembers(obj)
+
+	      function isNew(item) {
+	        return !sorted[item['@id']] && !processing.find(function (proc) {
+	          return proc['@id'] === item['@id'];
 	        });
-	    },
+	      }
 
-	    note: function parseNote(obj, uid) {
-	        var attrs = obj.attributes;
-	        var childNodes = obj.childNodes;
-	        var props = {};
+	      var processing = [];
+	      var sorted = {};
+	      var relations = changes.relation;
+	      if (!relations) return changes;
 
-	        props.id = uid;
-	        props.loc = getLoc(attrs);
+	      for (var i = 0; i < relations.length; i++) {
+	        var relation = relations[i]; // skip relation if already sorted
 
-	        // if notes are coincident, move them apart slightly
-	        var coincident = false;
-	        var epsilon = 0.00001;
-	        do {
-	            if (coincident) {
-	                props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
-	            }
-	            var bbox = geoExtent(props.loc).bbox();
-	            coincident = _noteCache.rtree.search(bbox).length;
-	        } while (coincident);
-
-	        // parse note contents
-	        for (var i = 0; i < childNodes.length; i++) {
-	            var node = childNodes[i];
-	            var nodeName = node.nodeName;
-	            if (nodeName === '#text') { continue; }
-
-	            // if the element is comments, parse the comments
-	            if (nodeName === 'comments') {
-	                props[nodeName] = parseComments(node.childNodes);
-	            } else {
-	                props[nodeName] = node.textContent;
-	            }
+	        if (!sorted[relation['@id']]) {
+	          processing.push(relation);
 	        }
 
-	        var note = new osmNote(props);
-	        var item = encodeNoteRtree(note);
-	        _noteCache.note[note.id] = note;
-	        _noteCache.rtree.insert(item);
+	        while (processing.length > 0) {
+	          var next = processing[0],
+	              deps = next.member.map(resolve).filter(Boolean).filter(isNew);
 
-	        return note;
-	    },
+	          if (deps.length === 0) {
+	            sorted[next['@id']] = next;
+	            processing.shift();
+	          } else {
+	            processing = deps.concat(processing);
+	          }
+	        }
+	      }
 
-	    user: function parseUser(obj, uid) {
-	        var attrs = obj.attributes;
-	        var user = {
-	            id: uid,
-	            display_name: attrs.display_name && attrs.display_name.value,
-	            account_created: attrs.account_created && attrs.account_created.value,
-	            changesets_count: '0',
-	            active_blocks: '0'
-	        };
+	      changes.relation = Object.values(sorted);
+	      return changes;
+	    }
 
-	        var img = obj.getElementsByTagName('img');
-	        if (img && img[0] && img[0].getAttribute('href')) {
-	            user.image_url = img[0].getAttribute('href');
-	        }
+	    function rep(entity) {
+	      return entity.asJXON(changeset_id);
+	    }
 
-	        var changesets = obj.getElementsByTagName('changesets');
-	        if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
-	            user.changesets_count = changesets[0].getAttribute('count');
-	        }
+	    return {
+	      osmChange: {
+	        '@version': 0.6,
+	        '@generator': 'iD',
+	        'create': sort(nest(changes.created.map(rep), ['node', 'way', 'relation'])),
+	        'modify': nest(changes.modified.map(rep), ['node', 'way', 'relation']),
+	        'delete': Object.assign(nest(changes.deleted.map(rep), ['relation', 'way', 'node']), {
+	          '@if-unused': true
+	        })
+	      }
+	    };
+	  },
+	  asGeoJSON: function asGeoJSON() {
+	    return {};
+	  }
+	});
 
-	        var blocks = obj.getElementsByTagName('blocks');
-	        if (blocks && blocks[0]) {
-	            var received = blocks[0].getElementsByTagName('received');
-	            if (received && received[0] && received[0].getAttribute('active')) {
-	                user.active_blocks = received[0].getAttribute('active');
-	            }
-	        }
+	function osmNote() {
+	  if (!(this instanceof osmNote)) {
+	    return new osmNote().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
+	}
 
-	        _userCache.user[uid] = user;
-	        delete _userCache.toLoad[uid];
-	        return user;
-	    }
+	osmNote.id = function () {
+	  return osmNote.id.next--;
 	};
 
-
-	function parseXML(xml, callback, options) {
-	    options = Object.assign({ skipSeen: true }, options);
-	    if (!xml || !xml.childNodes) {
-	        return callback({ message: 'No XML', status: -1 });
+	osmNote.id.next = -1;
+	Object.assign(osmNote.prototype, {
+	  type: 'note',
+	  initialize: function initialize(sources) {
+	    for (var i = 0; i < sources.length; ++i) {
+	      var source = sources[i];
+
+	      for (var prop in source) {
+	        if (Object.prototype.hasOwnProperty.call(source, prop)) {
+	          if (source[prop] === undefined) {
+	            delete this[prop];
+	          } else {
+	            this[prop] = source[prop];
+	          }
+	        }
+	      }
 	    }
 
-	    var root = xml.childNodes[0];
-	    var children = root.childNodes;
+	    if (!this.id) {
+	      this.id = osmNote.id().toString();
+	    }
 
-	    var handle = window.requestIdleCallback(function() {
-	        var results = [];
-	        var result;
-	        for (var i = 0; i < children.length; i++) {
-	            result = parseChild(children[i]);
-	            if (result) { results.push(result); }
-	        }
-	        callback(null, results);
+	    return this;
+	  },
+	  extent: function extent() {
+	    return new geoExtent(this.loc);
+	  },
+	  update: function update(attrs) {
+	    return osmNote(this, attrs); // {v: 1 + (this.v || 0)}
+	  },
+	  isNew: function isNew() {
+	    return this.id < 0;
+	  },
+	  move: function move(loc) {
+	    return this.update({
+	      loc: loc
 	    });
+	  }
+	});
 
-	    _deferred.add(handle);
-
+	function osmRelation() {
+	  if (!(this instanceof osmRelation)) {
+	    return new osmRelation().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
+	  }
+	}
+	osmEntity.relation = osmRelation;
+	osmRelation.prototype = Object.create(osmEntity.prototype);
 
-	    function parseChild(child) {
-	        var parser = parsers[child.nodeName];
-	        if (!parser) { return null; }
+	osmRelation.creationOrder = function (a, b) {
+	  var aId = parseInt(osmEntity.id.toOSM(a.id), 10);
+	  var bId = parseInt(osmEntity.id.toOSM(b.id), 10);
+	  if (aId < 0 || bId < 0) return aId - bId;
+	  return bId - aId;
+	};
 
-	        var uid;
-	        if (child.nodeName === 'user') {
-	            uid = child.attributes.id.value;
-	            if (options.skipSeen && _userCache.user[uid]) {
-	                delete _userCache.toLoad[uid];
-	                return null;
-	            }
+	Object.assign(osmRelation.prototype, {
+	  type: 'relation',
+	  members: [],
+	  copy: function copy(resolver, copies) {
+	    if (copies[this.id]) return copies[this.id];
+	    var copy = osmEntity.prototype.copy.call(this, resolver, copies);
+	    var members = this.members.map(function (member) {
+	      return Object.assign({}, member, {
+	        id: resolver.entity(member.id).copy(resolver, copies).id
+	      });
+	    });
+	    copy = copy.update({
+	      members: members
+	    });
+	    copies[this.id] = copy;
+	    return copy;
+	  },
+	  extent: function extent(resolver, memo) {
+	    return resolver["transient"](this, 'extent', function () {
+	      if (memo && memo[this.id]) return geoExtent();
+	      memo = memo || {};
+	      memo[this.id] = true;
+	      var extent = geoExtent();
 
-	        } else if (child.nodeName === 'note') {
-	            uid = child.getElementsByTagName('id')[0].textContent;
+	      for (var i = 0; i < this.members.length; i++) {
+	        var member = resolver.hasEntity(this.members[i].id);
 
-	        } else {
-	            uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);
-	            if (options.skipSeen) {
-	                if (_tileCache.seen[uid]) { return null; }  // avoid reparsing a "seen" entity
-	                _tileCache.seen[uid] = true;
-	            }
+	        if (member) {
+	          extent._extend(member.extent(resolver, memo));
 	        }
+	      }
 
-	        return parser(child, uid);
+	      return extent;
+	    });
+	  },
+	  geometry: function geometry(graph) {
+	    return graph["transient"](this, 'geometry', function () {
+	      return this.isMultipolygon() ? 'area' : 'relation';
+	    });
+	  },
+	  isDegenerate: function isDegenerate() {
+	    return this.members.length === 0;
+	  },
+	  // Return an array of members, each extended with an 'index' property whose value
+	  // is the member index.
+	  indexedMembers: function indexedMembers() {
+	    var result = new Array(this.members.length);
+
+	    for (var i = 0; i < this.members.length; i++) {
+	      result[i] = Object.assign({}, this.members[i], {
+	        index: i
+	      });
 	    }
-	}
-
 
-	// replace or remove note from rtree
-	function updateRtree$3(item, replace) {
-	    _noteCache.rtree.remove(item, function isEql(a, b) { return a.data.id === b.data.id; });
+	    return result;
+	  },
+	  // Return the first member with the given role. A copy of the member object
+	  // is returned, extended with an 'index' property whose value is the member index.
+	  memberByRole: function memberByRole(role) {
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].role === role) {
+	        return Object.assign({}, this.members[i], {
+	          index: i
+	        });
+	      }
+	    }
+	  },
+	  // Same as memberByRole, but returns all members with the given role
+	  membersByRole: function membersByRole(role) {
+	    var result = [];
 
-	    if (replace) {
-	        _noteCache.rtree.insert(item);
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].role === role) {
+	        result.push(Object.assign({}, this.members[i], {
+	          index: i
+	        }));
+	      }
 	    }
-	}
 
+	    return result;
+	  },
+	  // Return the first member with the given id. A copy of the member object
+	  // is returned, extended with an 'index' property whose value is the member index.
+	  memberById: function memberById(id) {
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].id === id) {
+	        return Object.assign({}, this.members[i], {
+	          index: i
+	        });
+	      }
+	    }
+	  },
+	  // Return the first member with the given id and role. A copy of the member object
+	  // is returned, extended with an 'index' property whose value is the member index.
+	  memberByIdAndRole: function memberByIdAndRole(id, role) {
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].id === id && this.members[i].role === role) {
+	        return Object.assign({}, this.members[i], {
+	          index: i
+	        });
+	      }
+	    }
+	  },
+	  addMember: function addMember(member, index) {
+	    var members = this.members.slice();
+	    members.splice(index === undefined ? members.length : index, 0, member);
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  updateMember: function updateMember(member, index) {
+	    var members = this.members.slice();
+	    members.splice(index, 1, Object.assign({}, members[index], member));
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  removeMember: function removeMember(index) {
+	    var members = this.members.slice();
+	    members.splice(index, 1);
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  removeMembersWithID: function removeMembersWithID(id) {
+	    var members = this.members.filter(function (m) {
+	      return m.id !== id;
+	    });
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  moveMember: function moveMember(fromIndex, toIndex) {
+	    var members = this.members.slice();
+	    members.splice(toIndex, 0, members.splice(fromIndex, 1)[0]);
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  // Wherever a member appears with id `needle.id`, replace it with a member
+	  // with id `replacement.id`, type `replacement.type`, and the original role,
+	  // By default, adding a duplicate member (by id and role) is prevented.
+	  // Return an updated relation.
+	  replaceMember: function replaceMember(needle, replacement, keepDuplicates) {
+	    if (!this.memberById(needle.id)) return this;
+	    var members = [];
+
+	    for (var i = 0; i < this.members.length; i++) {
+	      var member = this.members[i];
+
+	      if (member.id !== needle.id) {
+	        members.push(member);
+	      } else if (keepDuplicates || !this.memberByIdAndRole(replacement.id, member.role)) {
+	        members.push({
+	          id: replacement.id,
+	          type: replacement.type,
+	          role: member.role
+	        });
+	      }
+	    }
 
-	function wrapcb(thisArg, callback, cid) {
-	    return function(err, result) {
-	        if (err) {
-	            // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
-	            if (err.status === 400 || err.status === 401 || err.status === 403) {
-	                thisArg.logout();
+	    return this.update({
+	      members: members
+	    });
+	  },
+	  asJXON: function asJXON(changeset_id) {
+	    var r = {
+	      relation: {
+	        '@id': this.osmId(),
+	        '@version': this.version || 0,
+	        member: this.members.map(function (member) {
+	          return {
+	            keyAttributes: {
+	              type: member.type,
+	              role: member.role,
+	              ref: osmEntity.id.toOSM(member.id)
 	            }
-	            return callback.call(thisArg, err);
+	          };
+	        }, this),
+	        tag: Object.keys(this.tags).map(function (k) {
+	          return {
+	            keyAttributes: {
+	              k: k,
+	              v: this.tags[k]
+	            }
+	          };
+	        }, this)
+	      }
+	    };
 
-	        } else if (thisArg.getConnectionId() !== cid) {
-	            return callback.call(thisArg, { message: 'Connection Switched', status: -1 });
+	    if (changeset_id) {
+	      r.relation['@changeset'] = changeset_id;
+	    }
 
-	        } else {
-	            return callback.call(thisArg, err, result);
-	        }
-	    };
-	}
+	    return r;
+	  },
+	  asGeoJSON: function asGeoJSON(resolver) {
+	    return resolver["transient"](this, 'GeoJSON', function () {
+	      if (this.isMultipolygon()) {
+	        return {
+	          type: 'MultiPolygon',
+	          coordinates: this.multipolygon(resolver)
+	        };
+	      } else {
+	        return {
+	          type: 'FeatureCollection',
+	          properties: this.tags,
+	          features: this.members.map(function (member) {
+	            return Object.assign({
+	              role: member.role
+	            }, resolver.entity(member.id).asGeoJSON(resolver));
+	          })
+	        };
+	      }
+	    });
+	  },
+	  area: function area(resolver) {
+	    return resolver["transient"](this, 'area', function () {
+	      return d3_geoArea(this.asGeoJSON(resolver));
+	    });
+	  },
+	  isMultipolygon: function isMultipolygon() {
+	    return this.tags.type === 'multipolygon';
+	  },
+	  isComplete: function isComplete(resolver) {
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (!resolver.hasEntity(this.members[i].id)) {
+	        return false;
+	      }
+	    }
 
+	    return true;
+	  },
+	  hasFromViaTo: function hasFromViaTo() {
+	    return this.members.some(function (m) {
+	      return m.role === 'from';
+	    }) && this.members.some(function (m) {
+	      return m.role === 'via';
+	    }) && this.members.some(function (m) {
+	      return m.role === 'to';
+	    });
+	  },
+	  isRestriction: function isRestriction() {
+	    return !!(this.tags.type && this.tags.type.match(/^restriction:?/));
+	  },
+	  isValidRestriction: function isValidRestriction() {
+	    if (!this.isRestriction()) return false;
+	    var froms = this.members.filter(function (m) {
+	      return m.role === 'from';
+	    });
+	    var vias = this.members.filter(function (m) {
+	      return m.role === 'via';
+	    });
+	    var tos = this.members.filter(function (m) {
+	      return m.role === 'to';
+	    });
+	    if (froms.length !== 1 && this.tags.restriction !== 'no_entry') return false;
+	    if (froms.some(function (m) {
+	      return m.type !== 'way';
+	    })) return false;
+	    if (tos.length !== 1 && this.tags.restriction !== 'no_exit') return false;
+	    if (tos.some(function (m) {
+	      return m.type !== 'way';
+	    })) return false;
+	    if (vias.length === 0) return false;
+	    if (vias.length > 1 && vias.some(function (m) {
+	      return m.type !== 'way';
+	    })) return false;
+	    return true;
+	  },
+	  // Returns an array [A0, ... An], each Ai being an array of node arrays [Nds0, ... Ndsm],
+	  // where Nds0 is an outer ring and subsequent Ndsi's (if any i > 0) being inner rings.
+	  //
+	  // This corresponds to the structure needed for rendering a multipolygon path using a
+	  // `evenodd` fill rule, as well as the structure of a GeoJSON MultiPolygon geometry.
+	  //
+	  // In the case of invalid geometries, this function will still return a result which
+	  // includes the nodes of all way members, but some Nds may be unclosed and some inner
+	  // rings not matched with the intended outer ring.
+	  //
+	  multipolygon: function multipolygon(resolver) {
+	    var outers = this.members.filter(function (m) {
+	      return 'outer' === (m.role || 'outer');
+	    });
+	    var inners = this.members.filter(function (m) {
+	      return 'inner' === m.role;
+	    });
+	    outers = osmJoinWays(outers, resolver);
+	    inners = osmJoinWays(inners, resolver);
 
-	var serviceOsm = {
+	    var sequenceToLineString = function sequenceToLineString(sequence) {
+	      if (sequence.nodes.length > 2 && sequence.nodes[0] !== sequence.nodes[sequence.nodes.length - 1]) {
+	        // close unclosed parts to ensure correct area rendering - #2945
+	        sequence.nodes.push(sequence.nodes[0]);
+	      }
 
-	    init: function() {
-	        utilRebind(this, dispatch$6, 'on');
-	    },
+	      return sequence.nodes.map(function (node) {
+	        return node.loc;
+	      });
+	    };
 
+	    outers = outers.map(sequenceToLineString);
+	    inners = inners.map(sequenceToLineString);
+	    var result = outers.map(function (o) {
+	      // Heuristic for detecting counterclockwise winding order. Assumes
+	      // that OpenStreetMap polygons are not hemisphere-spanning.
+	      return [d3_geoArea({
+	        type: 'Polygon',
+	        coordinates: [o]
+	      }) > 2 * Math.PI ? o.reverse() : o];
+	    });
 
-	    reset: function() {
-	        Array.from(_deferred).forEach(function(handle) {
-	            window.cancelIdleCallback(handle);
-	            _deferred.delete(handle);
-	        });
+	    function findOuter(inner) {
+	      var o, outer;
 
-	        _connectionID++;
-	        _userChangesets = undefined;
-	        _userDetails = undefined;
-	        _rateLimitError = undefined;
+	      for (o = 0; o < outers.length; o++) {
+	        outer = outers[o];
+	        if (geoPolygonContainsPolygon(outer, inner)) return o;
+	      }
 
-	        Object.values(_tileCache.inflight).forEach(abortRequest$5);
-	        Object.values(_noteCache.inflight).forEach(abortRequest$5);
-	        Object.values(_noteCache.inflightPost).forEach(abortRequest$5);
-	        if (_changeset.inflight) { abortRequest$5(_changeset.inflight); }
+	      for (o = 0; o < outers.length; o++) {
+	        outer = outers[o];
+	        if (geoPolygonIntersectsPolygon(outer, inner, false)) return o;
+	      }
+	    }
 
-	        _tileCache = { toLoad: {}, loaded: {}, inflight: {}, seen: {}, rtree: new RBush() };
-	        _noteCache = { toLoad: {}, loaded: {}, inflight: {}, inflightPost: {}, note: {}, closed: {}, rtree: new RBush() };
-	        _userCache = { toLoad: {}, user: {} };
-	        _cachedApiStatus = undefined;
-	        _changeset = {};
+	    for (var i = 0; i < inners.length; i++) {
+	      var inner = inners[i];
 
-	        return this;
-	    },
+	      if (d3_geoArea({
+	        type: 'Polygon',
+	        coordinates: [inner]
+	      }) < 2 * Math.PI) {
+	        inner = inner.reverse();
+	      }
 
+	      var o = findOuter(inners[i]);
 
-	    getConnectionId: function() {
-	        return _connectionID;
-	    },
+	      if (o !== undefined) {
+	        result[o].push(inners[i]);
+	      } else {
+	        result.push([inners[i]]); // Invalid geometry
+	      }
+	    }
 
+	    return result;
+	  }
+	});
 
-	    changesetURL: function(changesetID) {
-	        return urlroot + '/changeset/' + changesetID;
-	    },
+	var QAItem = /*#__PURE__*/function () {
+	  function QAItem(loc, service, itemType, id, props) {
+	    _classCallCheck(this, QAItem);
 
+	    // Store required properties
+	    this.loc = loc;
+	    this.service = service.title;
+	    this.itemType = itemType; // All issues must have an ID for selection, use generic if none specified
 
-	    changesetsURL: function(center, zoom) {
-	        var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
-	        return urlroot + '/history#map=' +
-	            Math.floor(zoom) + '/' +
-	            center[1].toFixed(precision) + '/' +
-	            center[0].toFixed(precision);
-	    },
+	    this.id = id ? id : "".concat(QAItem.id());
+	    this.update(props); // Some QA services have marker icons to differentiate issues
 
+	    if (service && typeof service.getIcon === 'function') {
+	      this.icon = service.getIcon(itemType);
+	    }
+	  }
 
-	    entityURL: function(entity) {
-	        return urlroot + '/' + entity.type + '/' + entity.osmId();
-	    },
+	  _createClass(QAItem, [{
+	    key: "update",
+	    value: function update(props) {
+	      var _this = this;
 
+	      // You can't override this initial information
+	      var loc = this.loc,
+	          service = this.service,
+	          itemType = this.itemType,
+	          id = this.id;
+	      Object.keys(props).forEach(function (prop) {
+	        return _this[prop] = props[prop];
+	      });
+	      this.loc = loc;
+	      this.service = service;
+	      this.itemType = itemType;
+	      this.id = id;
+	      return this;
+	    } // Generic handling for newly created QAItems
 
-	    historyURL: function(entity) {
-	        return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
-	    },
+	  }], [{
+	    key: "id",
+	    value: function id() {
+	      return this.nextId--;
+	    }
+	  }]);
 
+	  return QAItem;
+	}();
+	QAItem.nextId = -1;
 
-	    userURL: function(username) {
-	        return urlroot + '/user/' + username;
-	    },
+	//
+	// Optionally, split only the given ways, if multiple ways share
+	// the given node.
+	//
+	// This is the inverse of `iD.actionJoin`.
+	//
+	// For testing convenience, accepts an ID to assign to the new way.
+	// Normally, this will be undefined and the way will automatically
+	// be assigned a new ID.
+	//
+	// Reference:
+	//   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/SplitWayAction.as
+	//
 
+	function actionSplit(nodeIds, newWayIds) {
+	  // accept single ID for backwards-compatiblity
+	  if (typeof nodeIds === 'string') nodeIds = [nodeIds];
 
-	    noteURL: function(note) {
-	        return urlroot + '/note/' + note.id;
-	    },
+	  var _wayIDs; // the strategy for picking which way will have a new version and which way is newly created
 
 
-	    noteReportURL: function(note) {
-	        return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
-	    },
+	  var _keepHistoryOn = 'longest'; // 'longest', 'first'
+	  // The IDs of the ways actually created by running this action
 
+	  var _createdWayIDs = [];
 
-	    // Generic method to load data from the OSM API
-	    // Can handle either auth or unauth calls.
-	    loadFromAPI: function(path, callback, options) {
-	        options = Object.assign({ skipSeen: true }, options);
-	        var that = this;
-	        var cid = _connectionID;
+	  function dist(graph, nA, nB) {
+	    var locA = graph.entity(nA).loc;
+	    var locB = graph.entity(nB).loc;
+	    var epsilon = 1e-6;
+	    return locA && locB ? geoSphericalDistance(locA, locB) : epsilon;
+	  } // If the way is closed, we need to search for a partner node
+	  // to split the way at.
+	  //
+	  // The following looks for a node that is both far away from
+	  // the initial node in terms of way segment length and nearby
+	  // in terms of beeline-distance. This assures that areas get
+	  // split on the most "natural" points (independent of the number
+	  // of nodes).
+	  // For example: bone-shaped areas get split across their waist
+	  // line, circles across the diameter.
+
+
+	  function splitArea(nodes, idxA, graph) {
+	    var lengths = new Array(nodes.length);
+	    var length;
+	    var i;
+	    var best = 0;
+	    var idxB;
 
-	        function done(err, payload) {
-	            if (that.getConnectionId() !== cid) {
-	                if (callback) { callback({ message: 'Connection Switched', status: -1 }); }
-	                return;
-	            }
+	    function wrap(index) {
+	      return utilWrap(index, nodes.length);
+	    } // calculate lengths
 
-	            var isAuthenticated = that.authenticated();
 
-	            // 400 Bad Request, 401 Unauthorized, 403 Forbidden
-	            // Logout and retry the request..
-	            if (isAuthenticated && err && err.status &&
-	                    (err.status === 400 || err.status === 401 || err.status === 403)) {
-	                that.logout();
-	                that.loadFromAPI(path, callback, options);
+	    length = 0;
 
-	            // else, no retry..
-	            } else {
-	                // 509 Bandwidth Limit Exceeded, 429 Too Many Requests
-	                // Set the rateLimitError flag and trigger a warning..
-	                if (!isAuthenticated && !_rateLimitError && err && err.status &&
-	                        (err.status === 509 || err.status === 429)) {
-	                    _rateLimitError = err;
-	                    dispatch$6.call('change');
-	                    that.reloadApiStatus();
-
-	                } else if ((err && _cachedApiStatus === 'online') ||
-	                    (!err && _cachedApiStatus !== 'online')) {
-	                    // If the response's error state doesn't match the status,
-	                    // it's likely we lost or gained the connection so reload the status
-	                    that.reloadApiStatus();
-	                }
+	    for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
+	      length += dist(graph, nodes[i], nodes[wrap(i - 1)]);
+	      lengths[i] = length;
+	    }
 
-	                if (callback) {
-	                    if (err) {
-	                        return callback(err);
-	                    } else {
-	                        if (path.indexOf('.json') !== -1) {
-	                            return parseJSON(payload, callback, options);
-	                        } else {
-	                            return parseXML(payload, callback, options);
-	                        }
-	                    }
-	                }
-	            }
-	        }
+	    length = 0;
 
-	        if (this.authenticated()) {
-	            return oauth.xhr({ method: 'GET', path: path }, done);
-	        } else {
-	            var url = urlroot + path;
-	            var controller = new AbortController();
-	            d3_json(url, { signal: controller.signal })
-	                .then(function(data) {
-	                    done(null, data);
-	                })
-	                .catch(function(err) {
-	                    if (err.name === 'AbortError') { return; }
-	                    // d3-fetch includes status in the error message,
-	                    // but we can't access the response itself
-	                    // https://github.com/d3/d3-fetch/issues/27
-	                    var match = err.message.match(/^\d{3}/);
-	                    if (match) {
-	                        done({ status: +match[0], statusText: err.message });
-	                    } else {
-	                        done(err.message);
-	                    }
-	                });
-	            return controller;
-	        }
-	    },
+	    for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
+	      length += dist(graph, nodes[i], nodes[wrap(i + 1)]);
 
+	      if (length < lengths[i]) {
+	        lengths[i] = length;
+	      }
+	    } // determine best opposite node to split
 
-	    // Load a single entity by id (ways and relations use the `/full` call)
-	    // GET /api/0.6/node/#id
-	    // GET /api/0.6/[way|relation]/#id/full
-	    loadEntity: function(id, callback) {
-	        var type = osmEntity.id.type(id);
-	        var osmID = osmEntity.id.toOSM(id);
-	        var options = { skipSeen: false };
 
-	        this.loadFromAPI(
-	            '/api/0.6/' + type + '/' + osmID + (type !== 'node' ? '/full' : '') + '.json',
-	            function(err, entities) {
-	                if (callback) { callback(err, { data: entities }); }
-	            },
-	            options
-	        );
-	    },
+	    for (i = 0; i < nodes.length; i++) {
+	      var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);
 
+	      if (cost > best) {
+	        idxB = i;
+	        best = cost;
+	      }
+	    }
 
-	    // Load a single entity with a specific version
-	    // GET /api/0.6/[node|way|relation]/#id/#version
-	    loadEntityVersion: function(id, version, callback) {
-	        var type = osmEntity.id.type(id);
-	        var osmID = osmEntity.id.toOSM(id);
-	        var options = { skipSeen: false };
+	    return idxB;
+	  }
 
-	        this.loadFromAPI(
-	            '/api/0.6/' + type + '/' + osmID + '/' + version + '.json',
-	            function(err, entities) {
-	                if (callback) { callback(err, { data: entities }); }
-	            },
-	            options
-	        );
-	    },
+	  function totalLengthBetweenNodes(graph, nodes) {
+	    var totalLength = 0;
 
+	    for (var i = 0; i < nodes.length - 1; i++) {
+	      totalLength += dist(graph, nodes[i], nodes[i + 1]);
+	    }
 
-	    // Load multiple entities in chunks
-	    // (note: callback may be called multiple times)
-	    // Unlike `loadEntity`, child nodes and members are not fetched
-	    // GET /api/0.6/[nodes|ways|relations]?#parameters
-	    loadMultiple: function(ids, callback) {
-	        var that = this;
-	        var groups = utilArrayGroupBy(utilArrayUniq(ids), osmEntity.id.type);
-
-	        Object.keys(groups).forEach(function(k) {
-	            var type = k + 's';   // nodes, ways, relations
-	            var osmIDs = groups[k].map(function(id) { return osmEntity.id.toOSM(id); });
-	            var options = { skipSeen: false };
-
-	            utilArrayChunk(osmIDs, 150).forEach(function(arr) {
-	                that.loadFromAPI(
-	                    '/api/0.6/' + type + '.json?' + type + '=' + arr.join(),
-	                    function(err, entities) {
-	                        if (callback) { callback(err, { data: entities }); }
-	                    },
-	                    options
-	                );
-	            });
-	        });
-	    },
+	    return totalLength;
+	  }
+
+	  function split(graph, nodeId, wayA, newWayId) {
+	    var wayB = osmWay({
+	      id: newWayId,
+	      tags: wayA.tags
+	    }); // `wayB` is the NEW way
 
+	    var origNodes = wayA.nodes.slice();
+	    var nodesA;
+	    var nodesB;
+	    var isArea = wayA.isArea();
+	    var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
 
-	    // Create, upload, and close a changeset
-	    // PUT /api/0.6/changeset/create
-	    // POST /api/0.6/changeset/#id/upload
-	    // PUT /api/0.6/changeset/#id/close
-	    putChangeset: function(changeset, changes, callback) {
-	        var cid = _connectionID;
+	    if (wayA.isClosed()) {
+	      var nodes = wayA.nodes.slice(0, -1);
+	      var idxA = nodes.indexOf(nodeId);
+	      var idxB = splitArea(nodes, idxA, graph);
 
-	        if (_changeset.inflight) {
-	            return callback({ message: 'Changeset already inflight', status: -2 }, changeset);
+	      if (idxB < idxA) {
+	        nodesA = nodes.slice(idxA).concat(nodes.slice(0, idxB + 1));
+	        nodesB = nodes.slice(idxB, idxA + 1);
+	      } else {
+	        nodesA = nodes.slice(idxA, idxB + 1);
+	        nodesB = nodes.slice(idxB).concat(nodes.slice(0, idxA + 1));
+	      }
+	    } else {
+	      var idx = wayA.nodes.indexOf(nodeId, 1);
+	      nodesA = wayA.nodes.slice(0, idx + 1);
+	      nodesB = wayA.nodes.slice(idx);
+	    }
 
-	        } else if (_changeset.open) {   // reuse existing open changeset..
-	            return createdChangeset.call(this, null, _changeset.open);
+	    var lengthA = totalLengthBetweenNodes(graph, nodesA);
+	    var lengthB = totalLengthBetweenNodes(graph, nodesB);
 
-	        } else {   // Open a new changeset..
-	            var options = {
-	                method: 'PUT',
-	                path: '/api/0.6/changeset/create',
-	                options: { header: { 'Content-Type': 'text/xml' } },
-	                content: JXON.stringify(changeset.asJXON())
-	            };
-	            _changeset.inflight = oauth.xhr(
-	                options,
-	                wrapcb(this, createdChangeset, cid)
-	            );
-	        }
+	    if (_keepHistoryOn === 'longest' && lengthB > lengthA) {
+	      // keep the history on the longer way, regardless of the node count
+	      wayA = wayA.update({
+	        nodes: nodesB
+	      });
+	      wayB = wayB.update({
+	        nodes: nodesA
+	      });
+	      var temp = lengthA;
+	      lengthA = lengthB;
+	      lengthB = temp;
+	    } else {
+	      wayA = wayA.update({
+	        nodes: nodesA
+	      });
+	      wayB = wayB.update({
+	        nodes: nodesB
+	      });
+	    }
 
+	    if (wayA.tags.step_count) {
+	      // divide up the the step count proportionally between the two ways
+	      var stepCount = parseFloat(wayA.tags.step_count);
+
+	      if (stepCount && // ensure a number
+	      isFinite(stepCount) && // ensure positive
+	      stepCount > 0 && // ensure integer
+	      Math.round(stepCount) === stepCount) {
+	        var tagsA = Object.assign({}, wayA.tags);
+	        var tagsB = Object.assign({}, wayB.tags);
+	        var ratioA = lengthA / (lengthA + lengthB);
+	        var countA = Math.round(stepCount * ratioA);
+	        tagsA.step_count = countA.toString();
+	        tagsB.step_count = (stepCount - countA).toString();
+	        wayA = wayA.update({
+	          tags: tagsA
+	        });
+	        wayB = wayB.update({
+	          tags: tagsB
+	        });
+	      }
+	    }
 
-	        function createdChangeset(err, changesetID) {
-	            _changeset.inflight = null;
-	            if (err) { return callback(err, changeset); }
+	    graph = graph.replace(wayA);
+	    graph = graph.replace(wayB);
+	    graph.parentRelations(wayA).forEach(function (relation) {
+	      var member; // Turn restrictions - make sure:
+	      // 1. Splitting a FROM/TO way - only `wayA` OR `wayB` remains in relation
+	      //    (whichever one is connected to the VIA node/ways)
+	      // 2. Splitting a VIA way - `wayB` remains in relation as a VIA way
 
-	            _changeset.open = changesetID;
-	            changeset = changeset.update({ id: changesetID });
+	      if (relation.hasFromViaTo()) {
+	        var f = relation.memberByRole('from');
+	        var v = relation.membersByRole('via');
+	        var t = relation.memberByRole('to');
+	        var i; // 1. split a FROM/TO
 
-	            // Upload the changeset..
-	            var options = {
-	                method: 'POST',
-	                path: '/api/0.6/changeset/' + changesetID + '/upload',
-	                options: { header: { 'Content-Type': 'text/xml' } },
-	                content: JXON.stringify(changeset.osmChangeJXON(changes))
-	            };
-	            _changeset.inflight = oauth.xhr(
-	                options,
-	                wrapcb(this, uploadedChangeset, cid)
-	            );
-	        }
-
-
-	        function uploadedChangeset(err) {
-	            _changeset.inflight = null;
-	            if (err) { return callback(err, changeset); }
-
-	            // Upload was successful, safe to call the callback.
-	            // Add delay to allow for postgres replication #1646 #2678
-	            window.setTimeout(function() { callback(null, changeset); }, 2500);
-	            _changeset.open = null;
-
-	            // At this point, we don't really care if the connection was switched..
-	            // Only try to close the changeset if we're still talking to the same server.
-	            if (this.getConnectionId() === cid) {
-	                // Still attempt to close changeset, but ignore response because #2667
-	                oauth.xhr({
-	                    method: 'PUT',
-	                    path: '/api/0.6/changeset/' + changeset.id + '/close',
-	                    options: { header: { 'Content-Type': 'text/xml' } }
-	                }, function() { return true; });
-	            }
-	        }
-	    },
+	        if (f.id === wayA.id || t.id === wayA.id) {
+	          var keepB = false;
 
+	          if (v.length === 1 && v[0].type === 'node') {
+	            // check via node
+	            keepB = wayB.contains(v[0].id);
+	          } else {
+	            // check via way(s)
+	            for (i = 0; i < v.length; i++) {
+	              if (v[i].type === 'way') {
+	                var wayVia = graph.hasEntity(v[i].id);
+
+	                if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
+	                  keepB = true;
+	                  break;
+	                }
+	              }
+	            }
+	          }
 
-	    // Load multiple users in chunks
-	    // (note: callback may be called multiple times)
-	    // GET /api/0.6/users?users=#id1,#id2,...,#idn
-	    loadUsers: function(uids, callback) {
-	        var toLoad = [];
-	        var cached = [];
+	          if (keepB) {
+	            relation = relation.replaceMember(wayA, wayB);
+	            graph = graph.replace(relation);
+	          } // 2. split a VIA
 
-	        utilArrayUniq(uids).forEach(function(uid) {
-	            if (_userCache.user[uid]) {
-	                delete _userCache.toLoad[uid];
-	                cached.push(_userCache.user[uid]);
-	            } else {
-	                toLoad.push(uid);
+	        } else {
+	          for (i = 0; i < v.length; i++) {
+	            if (v[i].type === 'way' && v[i].id === wayA.id) {
+	              member = {
+	                id: wayB.id,
+	                type: 'way',
+	                role: 'via'
+	              };
+	              graph = actionAddMember(relation.id, member, v[i].index + 1)(graph);
+	              break;
 	            }
-	        });
+	          }
+	        } // All other relations (Routes, Multipolygons, etc):
+	        // 1. Both `wayA` and `wayB` remain in the relation
+	        // 2. But must be inserted as a pair (see `actionAddMember` for details)
 
-	        if (cached.length || !this.authenticated()) {
-	            callback(undefined, cached);
-	            if (!this.authenticated()) { return; }  // require auth
+	      } else {
+	        if (relation === isOuter) {
+	          graph = graph.replace(relation.mergeTags(wayA.tags));
+	          graph = graph.replace(wayA.update({
+	            tags: {}
+	          }));
+	          graph = graph.replace(wayB.update({
+	            tags: {}
+	          }));
 	        }
 
-	        utilArrayChunk(toLoad, 150).forEach(function(arr) {
-	            oauth.xhr(
-	                { method: 'GET', path: '/api/0.6/users?users=' + arr.join() },
-	                wrapcb(this, done, _connectionID)
-	            );
-	        }.bind(this));
+	        member = {
+	          id: wayB.id,
+	          type: 'way',
+	          role: relation.memberById(wayA.id).role
+	        };
+	        var insertPair = {
+	          originalID: wayA.id,
+	          insertedID: wayB.id,
+	          nodes: origNodes
+	        };
+	        graph = actionAddMember(relation.id, member, undefined, insertPair)(graph);
+	      }
+	    });
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	    if (!isOuter && isArea) {
+	      var multipolygon = osmRelation({
+	        tags: Object.assign({}, wayA.tags, {
+	          type: 'multipolygon'
+	        }),
+	        members: [{
+	          id: wayA.id,
+	          role: 'outer',
+	          type: 'way'
+	        }, {
+	          id: wayB.id,
+	          role: 'outer',
+	          type: 'way'
+	        }]
+	      });
+	      graph = graph.replace(multipolygon);
+	      graph = graph.replace(wayA.update({
+	        tags: {}
+	      }));
+	      graph = graph.replace(wayB.update({
+	        tags: {}
+	      }));
+	    }
 
-	            var options = { skipSeen: true };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results);
-	                }
-	            }, options);
-	        }
-	    },
+	    _createdWayIDs.push(wayB.id);
 
+	    return graph;
+	  }
 
-	    // Load a given user by id
-	    // GET /api/0.6/user/#id
-	    loadUser: function(uid, callback) {
-	        if (_userCache.user[uid] || !this.authenticated()) {   // require auth
-	            delete _userCache.toLoad[uid];
-	            return callback(undefined, _userCache.user[uid]);
-	        }
+	  var action = function action(graph) {
+	    _createdWayIDs = [];
+	    var newWayIndex = 0;
 
-	        oauth.xhr(
-	            { method: 'GET', path: '/api/0.6/user/' + uid },
-	            wrapcb(this, done, _connectionID)
-	        );
+	    for (var i = 0; i < nodeIds.length; i++) {
+	      var nodeId = nodeIds[i];
+	      var candidates = action.waysForNode(nodeId, graph);
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	      for (var j = 0; j < candidates.length; j++) {
+	        graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
+	        newWayIndex += 1;
+	      }
+	    }
 
-	            var options = { skipSeen: true };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results[0]);
-	                }
-	            }, options);
-	        }
-	    },
+	    return graph;
+	  };
 
+	  action.getCreatedWayIDs = function () {
+	    return _createdWayIDs;
+	  };
 
-	    // Load the details of the logged-in user
-	    // GET /api/0.6/user/details
-	    userDetails: function(callback) {
-	        if (_userDetails) {    // retrieve cached
-	            return callback(undefined, _userDetails);
-	        }
+	  action.waysForNode = function (nodeId, graph) {
+	    var node = graph.entity(nodeId);
+	    var splittableParents = graph.parentWays(node).filter(isSplittable);
 
-	        oauth.xhr(
-	            { method: 'GET', path: '/api/0.6/user/details' },
-	            wrapcb(this, done, _connectionID)
-	        );
+	    if (!_wayIDs) {
+	      // If the ways to split aren't specified, only split the lines.
+	      // If there are no lines to split, split the areas.
+	      var hasLine = splittableParents.some(function (parent) {
+	        return parent.geometry(graph) === 'line';
+	      });
+
+	      if (hasLine) {
+	        return splittableParents.filter(function (parent) {
+	          return parent.geometry(graph) === 'line';
+	        });
+	      }
+	    }
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	    return splittableParents;
 
-	            var options = { skipSeen: false };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    _userDetails = results[0];
-	                    return callback(undefined, _userDetails);
-	                }
-	            }, options);
-	        }
-	    },
+	    function isSplittable(parent) {
+	      // If the ways to split are specified, ignore everything else.
+	      if (_wayIDs && _wayIDs.indexOf(parent.id) === -1) return false; // We can fake splitting closed ways at their endpoints...
 
+	      if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.
 
-	    // Load previous changesets for the logged in user
-	    // GET /api/0.6/changesets?user=#id
-	    userChangesets: function(callback) {
-	        if (_userChangesets) {    // retrieve cached
-	            return callback(undefined, _userChangesets);
-	        }
+	      for (var i = 1; i < parent.nodes.length - 1; i++) {
+	        if (parent.nodes[i] === nodeId) return true;
+	      }
 
-	        this.userDetails(
-	            wrapcb(this, gotDetails, _connectionID)
-	        );
+	      return false;
+	    }
+	  };
 
+	  action.ways = function (graph) {
+	    return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
+	      return action.waysForNode(nodeId, graph);
+	    })));
+	  };
 
-	        function gotDetails(err, user) {
-	            if (err) { return callback(err); }
+	  action.disabled = function (graph) {
+	    for (var i = 0; i < nodeIds.length; i++) {
+	      var nodeId = nodeIds[i];
+	      var candidates = action.waysForNode(nodeId, graph);
 
-	            oauth.xhr(
-	                { method: 'GET', path: '/api/0.6/changesets?user=' + user.id },
-	                wrapcb(this, done, _connectionID)
-	            );
-	        }
+	      if (candidates.length === 0 || _wayIDs && _wayIDs.length !== candidates.length) {
+	        return 'not_eligible';
+	      }
+	    }
+	  };
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	  action.limitWays = function (val) {
+	    if (!arguments.length) return _wayIDs;
+	    _wayIDs = val;
+	    return action;
+	  };
 
-	            _userChangesets = Array.prototype.map.call(
-	                xml.getElementsByTagName('changeset'),
-	                function (changeset) { return { tags: getTags(changeset) }; }
-	            ).filter(function (changeset) {
-	                var comment = changeset.tags.comment;
-	                return comment && comment !== '';
-	            });
+	  action.keepHistoryOn = function (val) {
+	    if (!arguments.length) return _keepHistoryOn;
+	    _keepHistoryOn = val;
+	    return action;
+	  };
 
-	            return callback(undefined, _userChangesets);
-	        }
-	    },
+	  return action;
+	}
 
+	function coreGraph(other, mutable) {
+	  if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);
 
-	    // Fetch the status of the OSM API
-	    // GET /api/capabilities
-	    status: function(callback) {
-	        var url = urlroot + '/api/capabilities';
-	        var errback = wrapcb(this, done, _connectionID);
-	        d3_xml(url)
-	            .then(function(data) { errback(null, data); })
-	            .catch(function(err) { errback(err.message); });
+	  if (other instanceof coreGraph) {
+	    var base = other.base();
+	    this.entities = Object.assign(Object.create(base.entities), other.entities);
+	    this._parentWays = Object.assign(Object.create(base.parentWays), other._parentWays);
+	    this._parentRels = Object.assign(Object.create(base.parentRels), other._parentRels);
+	  } else {
+	    this.entities = Object.create({});
+	    this._parentWays = Object.create({});
+	    this._parentRels = Object.create({});
+	    this.rebase(other || [], [this]);
+	  }
 
-	        function done(err, xml) {
-	            if (err) {
-	                // the status is null if no response could be retrieved
-	                return callback(err, null);
-	            }
+	  this.transients = {};
+	  this._childNodes = {};
+	  this.frozen = !mutable;
+	}
+	coreGraph.prototype = {
+	  hasEntity: function hasEntity(id) {
+	    return this.entities[id];
+	  },
+	  entity: function entity(id) {
+	    var entity = this.entities[id]; //https://github.com/openstreetmap/iD/issues/3973#issuecomment-307052376
 
-	            // update blacklists
-	            var elements = xml.getElementsByTagName('blacklist');
-	            var regexes = [];
-	            for (var i = 0; i < elements.length; i++) {
-	                var regex = elements[i].getAttribute('regex');  // needs unencode?
-	                if (regex) {
-	                    regexes.push(regex);
-	                }
-	            }
-	            if (regexes.length) {
-	                _blacklists = regexes;
-	            }
+	    if (!entity) {
+	      entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
+	    }
 
-	            if (_rateLimitError) {
-	                return callback(_rateLimitError, 'rateLimited');
-	            } else {
-	                var waynodes = xml.getElementsByTagName('waynodes');
-	                var maxWayNodes = waynodes.length && parseInt(waynodes[0].getAttribute('maximum'), 10);
-	                if (maxWayNodes && isFinite(maxWayNodes)) { _maxWayNodes = maxWayNodes; }
+	    if (!entity) {
+	      throw new Error('entity ' + id + ' not found');
+	    }
 
-	                var apiStatus = xml.getElementsByTagName('status');
-	                var val = apiStatus[0].getAttribute('api');
-	                return callback(undefined, val);
-	            }
-	        }
-	    },
+	    return entity;
+	  },
+	  geometry: function geometry(id) {
+	    return this.entity(id).geometry(this);
+	  },
+	  "transient": function transient(entity, key, fn) {
+	    var id = entity.id;
+	    var transients = this.transients[id] || (this.transients[id] = {});
 
-	    // Calls `status` and dispatches an `apiStatusChange` event if the returned
-	    // status differs from the cached status.
-	    reloadApiStatus: function() {
-	        // throttle to avoid unncessary API calls
-	        if (!this.throttledReloadApiStatus) {
-	            var that = this;
-	            this.throttledReloadApiStatus = throttle(function() {
-	                that.status(function(err, status) {
-	                    if (status !== _cachedApiStatus) {
-	                        _cachedApiStatus = status;
-	                        dispatch$6.call('apiStatusChange', that, err, status);
-	                    }
-	                });
-	            }, 500);
-	        }
-	        this.throttledReloadApiStatus();
-	    },
+	    if (transients[key] !== undefined) {
+	      return transients[key];
+	    }
 
+	    transients[key] = fn.call(entity);
+	    return transients[key];
+	  },
+	  parentWays: function parentWays(entity) {
+	    var parents = this._parentWays[entity.id];
+	    var result = [];
 
-	    // Returns the maximum number of nodes a single way can have
-	    maxWayNodes: function() {
-	        return _maxWayNodes;
-	    },
+	    if (parents) {
+	      parents.forEach(function (id) {
+	        result.push(this.entity(id));
+	      }, this);
+	    }
 
+	    return result;
+	  },
+	  isPoi: function isPoi(entity) {
+	    var parents = this._parentWays[entity.id];
+	    return !parents || parents.size === 0;
+	  },
+	  isShared: function isShared(entity) {
+	    var parents = this._parentWays[entity.id];
+	    return parents && parents.size > 1;
+	  },
+	  parentRelations: function parentRelations(entity) {
+	    var parents = this._parentRels[entity.id];
+	    var result = [];
 
-	    // Load data (entities) from the API in tiles
-	    // GET /api/0.6/map?bbox=
-	    loadTiles: function(projection, callback) {
-	        if (_off) { return; }
+	    if (parents) {
+	      parents.forEach(function (id) {
+	        result.push(this.entity(id));
+	      }, this);
+	    }
 
-	        // determine the needed tiles to cover the view
-	        var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection);
+	    return result;
+	  },
+	  parentMultipolygons: function parentMultipolygons(entity) {
+	    return this.parentRelations(entity).filter(function (relation) {
+	      return relation.isMultipolygon();
+	    });
+	  },
+	  childNodes: function childNodes(entity) {
+	    if (this._childNodes[entity.id]) return this._childNodes[entity.id];
+	    if (!entity.nodes) return [];
+	    var nodes = [];
 
-	        // abort inflight requests that are no longer needed
-	        var hadRequests = hasInflightRequests(_tileCache);
-	        abortUnwantedRequests$3(_tileCache, tiles);
-	        if (hadRequests && !hasInflightRequests(_tileCache)) {
-	            dispatch$6.call('loaded');    // stop the spinner
-	        }
+	    for (var i = 0; i < entity.nodes.length; i++) {
+	      nodes[i] = this.entity(entity.nodes[i]);
+	    }
+	    this._childNodes[entity.id] = nodes;
+	    return this._childNodes[entity.id];
+	  },
+	  base: function base() {
+	    return {
+	      'entities': Object.getPrototypeOf(this.entities),
+	      'parentWays': Object.getPrototypeOf(this._parentWays),
+	      'parentRels': Object.getPrototypeOf(this._parentRels)
+	    };
+	  },
+	  // Unlike other graph methods, rebase mutates in place. This is because it
+	  // is used only during the history operation that merges newly downloaded
+	  // data into each state. To external consumers, it should appear as if the
+	  // graph always contained the newly downloaded data.
+	  rebase: function rebase(entities, stack, force) {
+	    var base = this.base();
+	    var i, j, k, id;
 
-	        // issue new requests..
-	        tiles.forEach(function(tile) {
-	            this.loadTile(tile, callback);
-	        }, this);
-	    },
+	    for (i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (!entity.visible || !force && base.entities[entity.id]) continue; // Merging data into the base graph
 
+	      base.entities[entity.id] = entity;
 
-	    // Load a single data tile
-	    // GET /api/0.6/map?bbox=
-	    loadTile: function(tile, callback) {
-	        if (_off) { return; }
-	        if (_tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) { return; }
+	      this._updateCalculated(undefined, entity, base.parentWays, base.parentRels); // Restore provisionally-deleted nodes that are discovered to have an extant parent
 
-	        if (!hasInflightRequests(_tileCache)) {
-	            dispatch$6.call('loading');   // start the spinner
-	        }
 
-	        var path = '/api/0.6/map.json?bbox=';
-	        var options = { skipSeen: true };
+	      if (entity.type === 'way') {
+	        for (j = 0; j < entity.nodes.length; j++) {
+	          id = entity.nodes[j];
 
-	        _tileCache.inflight[tile.id] = this.loadFromAPI(
-	            path + tile.extent.toParam(),
-	            tileCallback,
-	            options
-	        );
+	          for (k = 1; k < stack.length; k++) {
+	            var ents = stack[k].entities;
 
-	        function tileCallback(err, parsed) {
-	            delete _tileCache.inflight[tile.id];
-	            if (!err) {
-	                delete _tileCache.toLoad[tile.id];
-	                _tileCache.loaded[tile.id] = true;
-	                var bbox = tile.extent.bbox();
-	                bbox.id = tile.id;
-	                _tileCache.rtree.insert(bbox);
-	            }
-	            if (callback) {
-	                callback(err, Object.assign({ data: parsed }, tile));
-	            }
-	            if (!hasInflightRequests(_tileCache)) {
-	                dispatch$6.call('loaded');     // stop the spinner
+	            if (ents.hasOwnProperty(id) && ents[id] === undefined) {
+	              delete ents[id];
 	            }
+	          }
 	        }
-	    },
-
-
-	    isDataLoaded: function(loc) {
-	        var bbox = { minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1] };
-	        return _tileCache.rtree.collides(bbox);
-	    },
+	      }
+	    }
 
+	    for (i = 0; i < stack.length; i++) {
+	      stack[i]._updateRebased();
+	    }
+	  },
+	  _updateRebased: function _updateRebased() {
+	    var base = this.base();
+	    Object.keys(this._parentWays).forEach(function (child) {
+	      if (base.parentWays[child]) {
+	        base.parentWays[child].forEach(function (id) {
+	          if (!this.entities.hasOwnProperty(id)) {
+	            this._parentWays[child].add(id);
+	          }
+	        }, this);
+	      }
+	    }, this);
+	    Object.keys(this._parentRels).forEach(function (child) {
+	      if (base.parentRels[child]) {
+	        base.parentRels[child].forEach(function (id) {
+	          if (!this.entities.hasOwnProperty(id)) {
+	            this._parentRels[child].add(id);
+	          }
+	        }, this);
+	      }
+	    }, this);
+	    this.transients = {}; // this._childNodes is not updated, under the assumption that
+	    // ways are always downloaded with their child nodes.
+	  },
+	  // Updates calculated properties (parentWays, parentRels) for the specified change
+	  _updateCalculated: function _updateCalculated(oldentity, entity, parentWays, parentRels) {
+	    parentWays = parentWays || this._parentWays;
+	    parentRels = parentRels || this._parentRels;
+	    var type = entity && entity.type || oldentity && oldentity.type;
+	    var removed, added, i;
+
+	    if (type === 'way') {
+	      // Update parentWays
+	      if (oldentity && entity) {
+	        removed = utilArrayDifference(oldentity.nodes, entity.nodes);
+	        added = utilArrayDifference(entity.nodes, oldentity.nodes);
+	      } else if (oldentity) {
+	        removed = oldentity.nodes;
+	        added = [];
+	      } else if (entity) {
+	        removed = [];
+	        added = entity.nodes;
+	      }
 
-	    // load the tile that covers the given `loc`
-	    loadTileAtLoc: function(loc, callback) {
-	        // Back off if the toLoad queue is filling up.. re #6417
-	        // (Currently `loadTileAtLoc` requests are considered low priority - used by operations to
-	        // let users safely edit geometries which extend to unloaded tiles.  We can drop some.)
-	        if (Object.keys(_tileCache.toLoad).length > 50) { return; }
+	      for (i = 0; i < removed.length; i++) {
+	        // make a copy of prototype property, store as own property, and update..
+	        parentWays[removed[i]] = new Set(parentWays[removed[i]]);
+	        parentWays[removed[i]]["delete"](oldentity.id);
+	      }
 
-	        var k = geoZoomToScale(_tileZoom$3 + 1);
-	        var offset = geoRawMercator().scale(k)(loc);
-	        var projection = geoRawMercator().transform({ k: k, x: -offset[0], y: -offset[1] });
-	        var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection);
+	      for (i = 0; i < added.length; i++) {
+	        // make a copy of prototype property, store as own property, and update..
+	        parentWays[added[i]] = new Set(parentWays[added[i]]);
+	        parentWays[added[i]].add(entity.id);
+	      }
+	    } else if (type === 'relation') {
+	      // Update parentRels
+	      // diff only on the IDs since the same entity can be a member multiple times with different roles
+	      var oldentityMemberIDs = oldentity ? oldentity.members.map(function (m) {
+	        return m.id;
+	      }) : [];
+	      var entityMemberIDs = entity ? entity.members.map(function (m) {
+	        return m.id;
+	      }) : [];
+
+	      if (oldentity && entity) {
+	        removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
+	        added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
+	      } else if (oldentity) {
+	        removed = oldentityMemberIDs;
+	        added = [];
+	      } else if (entity) {
+	        removed = [];
+	        added = entityMemberIDs;
+	      }
 
-	        tiles.forEach(function(tile) {
-	            if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) { return; }
+	      for (i = 0; i < removed.length; i++) {
+	        // make a copy of prototype property, store as own property, and update..
+	        parentRels[removed[i]] = new Set(parentRels[removed[i]]);
+	        parentRels[removed[i]]["delete"](oldentity.id);
+	      }
 
-	            _tileCache.toLoad[tile.id] = true;
-	            this.loadTile(tile, callback);
-	        }, this);
-	    },
+	      for (i = 0; i < added.length; i++) {
+	        // make a copy of prototype property, store as own property, and update..
+	        parentRels[added[i]] = new Set(parentRels[added[i]]);
+	        parentRels[added[i]].add(entity.id);
+	      }
+	    }
+	  },
+	  replace: function replace(entity) {
+	    if (this.entities[entity.id] === entity) return this;
+	    return this.update(function () {
+	      this._updateCalculated(this.entities[entity.id], entity);
 
+	      this.entities[entity.id] = entity;
+	    });
+	  },
+	  remove: function remove(entity) {
+	    return this.update(function () {
+	      this._updateCalculated(entity, undefined);
 
-	    // Load notes from the API in tiles
-	    // GET /api/0.6/notes?bbox=
-	    loadNotes: function(projection, noteOptions) {
-	        noteOptions = Object.assign({ limit: 10000, closed: 7 }, noteOptions);
-	        if (_off) { return; }
+	      this.entities[entity.id] = undefined;
+	    });
+	  },
+	  revert: function revert(id) {
+	    var baseEntity = this.base().entities[id];
+	    var headEntity = this.entities[id];
+	    if (headEntity === baseEntity) return this;
+	    return this.update(function () {
+	      this._updateCalculated(headEntity, baseEntity);
+
+	      delete this.entities[id];
+	    });
+	  },
+	  update: function update() {
+	    var graph = this.frozen ? coreGraph(this, true) : this;
 
-	        var that = this;
-	        var path = '/api/0.6/notes?limit=' + noteOptions.limit + '&closed=' + noteOptions.closed + '&bbox=';
-	        var throttleLoadUsers = throttle(function() {
-	            var uids = Object.keys(_userCache.toLoad);
-	            if (!uids.length) { return; }
-	            that.loadUsers(uids, function() {});  // eagerly load user details
-	        }, 750);
-
-	        // determine the needed tiles to cover the view
-	        var tiles = tiler$5.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection);
-
-	        // abort inflight requests that are no longer needed
-	        abortUnwantedRequests$3(_noteCache, tiles);
-
-	        // issue new requests..
-	        tiles.forEach(function(tile) {
-	            if (_noteCache.loaded[tile.id] || _noteCache.inflight[tile.id]) { return; }
-
-	            var options = { skipSeen: false };
-	            _noteCache.inflight[tile.id] = that.loadFromAPI(
-	                path + tile.extent.toParam(),
-	                function(err) {
-	                    delete _noteCache.inflight[tile.id];
-	                    if (!err) {
-	                        _noteCache.loaded[tile.id] = true;
-	                    }
-	                    throttleLoadUsers();
-	                    dispatch$6.call('loadedNotes');
-	                },
-	                options
-	            );
-	        });
-	    },
+	    for (var i = 0; i < arguments.length; i++) {
+	      arguments[i].call(graph, graph);
+	    }
 
+	    if (this.frozen) graph.frozen = true;
+	    return graph;
+	  },
+	  // Obliterates any existing entities
+	  load: function load(entities) {
+	    var base = this.base();
+	    this.entities = Object.create(base.entities);
 
-	    // Create a note
-	    // POST /api/0.6/notes?params
-	    postNoteCreate: function(note, callback) {
-	        if (!this.authenticated()) {
-	            return callback({ message: 'Not Authenticated', status: -3 }, note);
-	        }
-	        if (_noteCache.inflightPost[note.id]) {
-	            return callback({ message: 'Note update already inflight', status: -2 }, note);
-	        }
+	    for (var i in entities) {
+	      this.entities[i] = entities[i];
 
-	        if (!note.loc[0] || !note.loc[1] || !note.newComment) { return; } // location & description required
+	      this._updateCalculated(base.entities[i], this.entities[i]);
+	    }
 
-	        var comment = note.newComment;
-	        if (note.newCategory && note.newCategory !== 'None') { comment += ' #' + note.newCategory; }
+	    return this;
+	  }
+	};
 
-	        var path = '/api/0.6/notes?' + utilQsString({ lon: note.loc[0], lat: note.loc[1], text: comment });
+	function osmTurn(turn) {
+	  if (!(this instanceof osmTurn)) {
+	    return new osmTurn(turn);
+	  }
 
-	        _noteCache.inflightPost[note.id] = oauth.xhr(
-	            { method: 'POST', path: path },
-	            wrapcb(this, done, _connectionID)
-	        );
+	  Object.assign(this, turn);
+	}
+	function osmIntersection(graph, startVertexId, maxDistance) {
+	  maxDistance = maxDistance || 30; // in meters
 
+	  var vgraph = coreGraph(); // virtual graph
 
-	        function done(err, xml) {
-	            delete _noteCache.inflightPost[note.id];
-	            if (err) { return callback(err); }
+	  var i, j, k;
 
-	            // we get the updated note back, remove from caches and reparse..
-	            this.removeNote(note);
+	  function memberOfRestriction(entity) {
+	    return graph.parentRelations(entity).some(function (r) {
+	      return r.isRestriction();
+	    });
+	  }
 
-	            var options = { skipSeen: false };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results[0]);
-	                }
-	            }, options);
+	  function isRoad(way) {
+	    if (way.isArea() || way.isDegenerate()) return false;
+	    var roads = {
+	      'motorway': true,
+	      'motorway_link': true,
+	      'trunk': true,
+	      'trunk_link': true,
+	      'primary': true,
+	      'primary_link': true,
+	      'secondary': true,
+	      'secondary_link': true,
+	      'tertiary': true,
+	      'tertiary_link': true,
+	      'residential': true,
+	      'unclassified': true,
+	      'living_street': true,
+	      'service': true,
+	      'road': true,
+	      'track': true
+	    };
+	    return roads[way.tags.highway];
+	  }
+
+	  var startNode = graph.entity(startVertexId);
+	  var checkVertices = [startNode];
+	  var checkWays;
+	  var vertices = [];
+	  var vertexIds = [];
+	  var vertex;
+	  var ways = [];
+	  var wayIds = [];
+	  var way;
+	  var nodes = [];
+	  var node;
+	  var parents = [];
+	  var parent; // `actions` will store whatever actions must be performed to satisfy
+	  // preconditions for adding a turn restriction to this intersection.
+	  //  - Remove any existing degenerate turn restrictions (missing from/to, etc)
+	  //  - Reverse oneways so that they are drawn in the forward direction
+	  //  - Split ways on key vertices
+
+	  var actions = []; // STEP 1:  walk the graph outwards from starting vertex to search
+	  //  for more key vertices and ways to include in the intersection..
+
+	  while (checkVertices.length) {
+	    vertex = checkVertices.pop(); // check this vertex for parent ways that are roads
+
+	    checkWays = graph.parentWays(vertex);
+	    var hasWays = false;
+
+	    for (i = 0; i < checkWays.length; i++) {
+	      way = checkWays[i];
+	      if (!isRoad(way) && !memberOfRestriction(way)) continue;
+	      ways.push(way); // it's a road, or it's already in a turn restriction
+
+	      hasWays = true; // check the way's children for more key vertices
+
+	      nodes = utilArrayUniq(graph.childNodes(way));
+
+	      for (j = 0; j < nodes.length; j++) {
+	        node = nodes[j];
+	        if (node === vertex) continue; // same thing
+
+	        if (vertices.indexOf(node) !== -1) continue; // seen it already
+
+	        if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) continue; // too far from start
+	        // a key vertex will have parents that are also roads
+
+	        var hasParents = false;
+	        parents = graph.parentWays(node);
+
+	        for (k = 0; k < parents.length; k++) {
+	          parent = parents[k];
+	          if (parent === way) continue; // same thing
+
+	          if (ways.indexOf(parent) !== -1) continue; // seen it already
+
+	          if (!isRoad(parent)) continue; // not a road
+
+	          hasParents = true;
+	          break;
 	        }
-	    },
 
-
-	    // Update a note
-	    // POST /api/0.6/notes/#id/comment?text=comment
-	    // POST /api/0.6/notes/#id/close?text=comment
-	    // POST /api/0.6/notes/#id/reopen?text=comment
-	    postNoteUpdate: function(note, newStatus, callback) {
-	        if (!this.authenticated()) {
-	            return callback({ message: 'Not Authenticated', status: -3 }, note);
-	        }
-	        if (_noteCache.inflightPost[note.id]) {
-	            return callback({ message: 'Note update already inflight', status: -2 }, note);
+	        if (hasParents) {
+	          checkVertices.push(node);
 	        }
+	      }
+	    }
 
-	        var action;
-	        if (note.status !== 'closed' && newStatus === 'closed') {
-	            action = 'close';
-	        } else if (note.status !== 'open' && newStatus === 'open') {
-	            action = 'reopen';
-	        } else {
-	            action = 'comment';
-	            if (!note.newComment) { return; } // when commenting, comment required
-	        }
+	    if (hasWays) {
+	      vertices.push(vertex);
+	    }
+	  }
 
-	        var path = '/api/0.6/notes/' + note.id + '/' + action;
-	        if (note.newComment) {
-	            path += '?' + utilQsString({ text: note.newComment });
-	        }
+	  vertices = utilArrayUniq(vertices);
+	  ways = utilArrayUniq(ways); // STEP 2:  Build a virtual graph containing only the entities in the intersection..
+	  // Everything done after this step should act on the virtual graph
+	  // Any actions that must be performed later to the main graph go in `actions` array
 
-	        _noteCache.inflightPost[note.id] = oauth.xhr(
-	            { method: 'POST', path: path },
-	            wrapcb(this, done, _connectionID)
-	        );
+	  ways.forEach(function (way) {
+	    graph.childNodes(way).forEach(function (node) {
+	      vgraph = vgraph.replace(node);
+	    });
+	    vgraph = vgraph.replace(way);
+	    graph.parentRelations(way).forEach(function (relation) {
+	      if (relation.isRestriction()) {
+	        if (relation.isValidRestriction(graph)) {
+	          vgraph = vgraph.replace(relation);
+	        } else if (relation.isComplete(graph)) {
+	          actions.push(actionDeleteRelation(relation.id));
+	        }
+	      }
+	    });
+	  }); // STEP 3:  Force all oneways to be drawn in the forward direction
 
+	  ways.forEach(function (w) {
+	    var way = vgraph.entity(w.id);
 
-	        function done(err, xml) {
-	            delete _noteCache.inflightPost[note.id];
-	            if (err) { return callback(err); }
+	    if (way.tags.oneway === '-1') {
+	      var action = actionReverse(way.id, {
+	        reverseOneway: true
+	      });
+	      actions.push(action);
+	      vgraph = action(vgraph);
+	    }
+	  }); // STEP 4:  Split ways on key vertices
+
+	  var origCount = osmEntity.id.next.way;
+	  vertices.forEach(function (v) {
+	    // This is an odd way to do it, but we need to find all the ways that
+	    // will be split here, then split them one at a time to ensure that these
+	    // actions can be replayed on the main graph exactly in the same order.
+	    // (It is unintuitive, but the order of ways returned from graph.parentWays()
+	    // is arbitrary, depending on how the main graph and vgraph were built)
+	    var splitAll = actionSplit([v.id]).keepHistoryOn('first');
+
+	    if (!splitAll.disabled(vgraph)) {
+	      splitAll.ways(vgraph).forEach(function (way) {
+	        var splitOne = actionSplit([v.id]).limitWays([way.id]).keepHistoryOn('first');
+	        actions.push(splitOne);
+	        vgraph = splitOne(vgraph);
+	      });
+	    }
+	  }); // In here is where we should also split the intersection at nearby junction.
+	  //   for https://github.com/mapbox/iD-internal/issues/31
+	  // nearbyVertices.forEach(function(v) {
+	  // });
+	  // Reasons why we reset the way id count here:
+	  //  1. Continuity with way ids created by the splits so that we can replay
+	  //     these actions later if the user decides to create a turn restriction
+	  //  2. Avoids churning way ids just by hovering over a vertex
+	  //     and displaying the turn restriction editor
 
-	            // we get the updated note back, remove from caches and reparse..
-	            this.removeNote(note);
+	  osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities
 
-	            // update closed note cache - used to populate `closed:note` changeset tag
-	            if (action === 'close') {
-	                _noteCache.closed[note.id] = true;
-	            } else if (action === 'reopen') {
-	                delete _noteCache.closed[note.id];
-	            }
+	  vertexIds = vertices.map(function (v) {
+	    return v.id;
+	  });
+	  vertices = [];
+	  ways = [];
+	  vertexIds.forEach(function (id) {
+	    var vertex = vgraph.entity(id);
+	    var parents = vgraph.parentWays(vertex);
+	    vertices.push(vertex);
+	    ways = ways.concat(parents);
+	  });
+	  vertices = utilArrayUniq(vertices);
+	  ways = utilArrayUniq(ways);
+	  vertexIds = vertices.map(function (v) {
+	    return v.id;
+	  });
+	  wayIds = ways.map(function (w) {
+	    return w.id;
+	  }); // STEP 6:  Update the ways with some metadata that will be useful for
+	  // walking the intersection graph later and rendering turn arrows.
 
-	            var options = { skipSeen: false };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results[0]);
-	                }
-	            }, options);
-	        }
-	    },
+	  function withMetadata(way, vertexIds) {
+	    var __oneWay = way.isOneWay(); // which affixes are key vertices?
 
 
-	    switch: function(options) {
-	        urlroot = options.urlroot;
+	    var __first = vertexIds.indexOf(way.first()) !== -1;
 
-	        oauth.options(Object.assign({
-	            url: urlroot,
-	            loading: authLoading,
-	            done: authDone
-	        }, options));
+	    var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?
 
-	        this.reset();
-	        this.userChangesets(function() {});  // eagerly load user details/changesets
-	        dispatch$6.call('change');
-	        return this;
-	    },
 
+	    var __via = __first && __last;
 
-	    toggle: function(val) {
-	        _off = !val;
-	        return this;
-	    },
+	    var __from = __first && !__oneWay || __last;
 
+	    var __to = __first || __last && !__oneWay;
 
-	    isChangesetInflight: function() {
-	        return !!_changeset.inflight;
-	    },
+	    return way.update({
+	      __first: __first,
+	      __last: __last,
+	      __from: __from,
+	      __via: __via,
+	      __to: __to,
+	      __oneWay: __oneWay
+	    });
+	  }
 
+	  ways = [];
+	  wayIds.forEach(function (id) {
+	    var way = withMetadata(vgraph.entity(id), vertexIds);
+	    vgraph = vgraph.replace(way);
+	    ways.push(way);
+	  }); // STEP 7:  Simplify - This is an iterative process where we:
+	  //  1. Find trivial vertices with only 2 parents
+	  //  2. trim off the leaf way from those vertices and remove from vgraph
 
-	    // get/set cached data
-	    // This is used to save/restore the state when entering/exiting the walkthrough
-	    // Also used for testing purposes.
-	    caches: function(obj) {
-	        function cloneCache(source) {
-	            var target = {};
-	            Object.keys(source).forEach(function(k) {
-	                if (k === 'rtree') {
-	                    target.rtree = new RBush().fromJSON(source.rtree.toJSON());  // clone rbush
-	                } else if (k === 'note') {
-	                    target.note = {};
-	                    Object.keys(source.note).forEach(function(id) {
-	                        target.note[id] = osmNote(source.note[id]);   // copy notes
-	                    });
-	                } else {
-	                    target[k] = JSON.parse(JSON.stringify(source[k]));   // clone deep
-	                }
-	            });
-	            return target;
-	        }
+	  var keepGoing;
+	  var removeWayIds = [];
+	  var removeVertexIds = [];
 
-	        if (!arguments.length) {
-	            return {
-	                tile: cloneCache(_tileCache),
-	                note: cloneCache(_noteCache),
-	                user: cloneCache(_userCache)
-	            };
-	        }
+	  do {
+	    keepGoing = false;
+	    checkVertices = vertexIds.slice();
 
-	        // access caches directly for testing (e.g., loading notes rtree)
-	        if (obj === 'get') {
-	            return {
-	                tile: _tileCache,
-	                note: _noteCache,
-	                user: _userCache
-	            };
-	        }
+	    for (i = 0; i < checkVertices.length; i++) {
+	      var vertexId = checkVertices[i];
+	      vertex = vgraph.hasEntity(vertexId);
 
-	        if (obj.tile) {
-	            _tileCache = obj.tile;
-	            _tileCache.inflight = {};
+	      if (!vertex) {
+	        if (vertexIds.indexOf(vertexId) !== -1) {
+	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
 	        }
-	        if (obj.note) {
-	            _noteCache = obj.note;
-	            _noteCache.inflight = {};
-	            _noteCache.inflightPost = {};
-	        }
-	        if (obj.user) {
-	            _userCache = obj.user;
-	        }
-
-	        return this;
-	    },
-
-
-	    logout: function() {
-	        _userChangesets = undefined;
-	        _userDetails = undefined;
-	        oauth.logout();
-	        dispatch$6.call('change');
-	        return this;
-	    },
 
+	        removeVertexIds.push(vertexId);
+	        continue;
+	      }
 
-	    authenticated: function() {
-	        return oauth.authenticated();
-	    },
+	      parents = vgraph.parentWays(vertex);
 
+	      if (parents.length < 3) {
+	        if (vertexIds.indexOf(vertexId) !== -1) {
+	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+	        }
+	      }
 
-	    authenticate: function(callback) {
-	        var that = this;
-	        var cid = _connectionID;
-	        _userChangesets = undefined;
-	        _userDetails = undefined;
+	      if (parents.length === 2) {
+	        // vertex with 2 parents is trivial
+	        var a = parents[0];
+	        var b = parents[1];
+	        var aIsLeaf = a && !a.__via;
+	        var bIsLeaf = b && !b.__via;
+	        var leaf, survivor;
 
-	        function done(err, res) {
-	            if (err) {
-	                if (callback) { callback(err); }
-	                return;
-	            }
-	            if (that.getConnectionId() !== cid) {
-	                if (callback) { callback({ message: 'Connection Switched', status: -1 }); }
-	                return;
-	            }
-	            _rateLimitError = undefined;
-	            dispatch$6.call('change');
-	            if (callback) { callback(err, res); }
-	            that.userChangesets(function() {});  // eagerly load user details/changesets
+	        if (aIsLeaf && !bIsLeaf) {
+	          leaf = a;
+	          survivor = b;
+	        } else if (!aIsLeaf && bIsLeaf) {
+	          leaf = b;
+	          survivor = a;
 	        }
 
-	        return oauth.authenticate(done);
-	    },
-
+	        if (leaf && survivor) {
+	          survivor = withMetadata(survivor, vertexIds); // update survivor way
 
-	    imageryBlacklists: function() {
-	        return _blacklists;
-	    },
+	          vgraph = vgraph.replace(survivor).remove(leaf); // update graph
 
+	          removeWayIds.push(leaf.id);
+	          keepGoing = true;
+	        }
+	      }
 
-	    tileZoom: function(val) {
-	        if (!arguments.length) { return _tileZoom$3; }
-	        _tileZoom$3 = val;
-	        return this;
-	    },
+	      parents = vgraph.parentWays(vertex);
 
+	      if (parents.length < 2) {
+	        // vertex is no longer a key vertex
+	        if (vertexIds.indexOf(vertexId) !== -1) {
+	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+	        }
 
-	    // get all cached notes covering the viewport
-	    notes: function(projection) {
-	        var viewport = projection.clipExtent();
-	        var min = [viewport[0][0], viewport[1][1]];
-	        var max = [viewport[1][0], viewport[0][1]];
-	        var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	        removeVertexIds.push(vertexId);
+	        keepGoing = true;
+	      }
 
-	        return _noteCache.rtree.search(bbox)
-	            .map(function(d) { return d.data; });
-	    },
+	      if (parents.length < 1) {
+	        // vertex is no longer attached to anything
+	        vgraph = vgraph.remove(vertex);
+	      }
+	    }
+	  } while (keepGoing);
 
+	  vertices = vertices.filter(function (vertex) {
+	    return removeVertexIds.indexOf(vertex.id) === -1;
+	  }).map(function (vertex) {
+	    return vgraph.entity(vertex.id);
+	  });
+	  ways = ways.filter(function (way) {
+	    return removeWayIds.indexOf(way.id) === -1;
+	  }).map(function (way) {
+	    return vgraph.entity(way.id);
+	  }); // OK!  Here is our intersection..
+
+	  var intersection = {
+	    graph: vgraph,
+	    actions: actions,
+	    vertices: vertices,
+	    ways: ways
+	  }; // Get all the valid turns through this intersection given a starting way id.
+	  // This operates on the virtual graph for everything.
+	  //
+	  // Basically, walk through all possible paths from starting way,
+	  //   honoring the existing turn restrictions as we go (watch out for loops!)
+	  //
+	  // For each path found, generate and return a `osmTurn` datastructure.
+	  //
 
-	    // get a single note from the cache
-	    getNote: function(id) {
-	        return _noteCache.note[id];
-	    },
+	  intersection.turns = function (fromWayId, maxViaWay) {
+	    if (!fromWayId) return [];
+	    if (!maxViaWay) maxViaWay = 0;
+	    var vgraph = intersection.graph;
+	    var keyVertexIds = intersection.vertices.map(function (v) {
+	      return v.id;
+	    });
+	    var start = vgraph.entity(fromWayId);
+	    if (!start || !(start.__from || start.__via)) return []; // maxViaWay=0   from-*-to              (0 vias)
+	    // maxViaWay=1   from-*-via-*-to        (1 via max)
+	    // maxViaWay=2   from-*-via-*-via-*-to  (2 vias max)
 
+	    var maxPathLength = maxViaWay * 2 + 3;
+	    var turns = [];
+	    step(start);
+	    return turns; // traverse the intersection graph and find all the valid paths
 
-	    // remove a single note from the cache
-	    removeNote: function(note) {
-	        if (!(note instanceof osmNote) || !note.id) { return; }
+	    function step(entity, currPath, currRestrictions, matchedRestriction) {
+	      currPath = (currPath || []).slice(); // shallow copy
 
-	        delete _noteCache.note[note.id];
-	        updateRtree$3(encodeNoteRtree(note), false);  // false = remove
-	    },
+	      if (currPath.length >= maxPathLength) return;
+	      currPath.push(entity.id);
+	      currRestrictions = (currRestrictions || []).slice(); // shallow copy
 
+	      var i, j;
 
-	    // replace a single note in the cache
-	    replaceNote: function(note) {
-	        if (!(note instanceof osmNote) || !note.id) { return; }
+	      if (entity.type === 'node') {
+	        var parents = vgraph.parentWays(entity);
+	        var nextWays = []; // which ways can we step into?
 
-	        _noteCache.note[note.id] = note;
-	        updateRtree$3(encodeNoteRtree(note), true);  // true = replace
-	        return note;
-	    },
+	        for (i = 0; i < parents.length; i++) {
+	          var way = parents[i]; // if next way is a oneway incoming to this vertex, skip
 
+	          if (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip
 
-	    // Get an array of note IDs closed during this session.
-	    // Used to populate `closed:note` changeset tag
-	    getClosedIDs: function() {
-	        return Object.keys(_noteCache.closed).sort();
-	    }
+	          if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)
 
-	};
+	          var restrict = null;
 
-	var apibase$3 = 'https://wiki.openstreetmap.org/w/api.php';
-	var _inflight$1 = {};
-	var _wikibaseCache = {};
-	var _localeIDs = { en: false };
+	          for (j = 0; j < currRestrictions.length; j++) {
+	            var restriction = currRestrictions[j];
+	            var f = restriction.memberByRole('from');
+	            var v = restriction.membersByRole('via');
+	            var t = restriction.memberByRole('to');
+	            var isOnly = /^only_/.test(restriction.tags.restriction); // Does the current path match this turn restriction?
 
+	            var matchesFrom = f.id === fromWayId;
+	            var matchesViaTo = false;
+	            var isAlongOnlyPath = false;
 
-	var debouncedRequest = debounce(request, 500, { leading: false });
+	            if (t.id === way.id) {
+	              // match TO
+	              if (v.length === 1 && v[0].type === 'node') {
+	                // match VIA node
+	                matchesViaTo = v[0].id === entity.id && (matchesFrom && currPath.length === 2 || !matchesFrom && currPath.length > 2);
+	              } else {
+	                // match all VIA ways
+	                var pathVias = [];
 
-	function request(url, callback) {
-	    if (_inflight$1[url]) { return; }
-	    var controller = new AbortController();
-	    _inflight$1[url] = controller;
+	                for (k = 2; k < currPath.length; k += 2) {
+	                  // k = 2 skips FROM
+	                  pathVias.push(currPath[k]); // (path goes way-node-way...)
+	                }
 
-	    d3_json(url, { signal: controller.signal })
-	        .then(function(result) {
-	            delete _inflight$1[url];
-	            if (callback) { callback(null, result); }
-	        })
-	        .catch(function(err) {
-	            delete _inflight$1[url];
-	            if (err.name === 'AbortError') { return; }
-	            if (callback) { callback(err.message); }
-	        });
-	}
+	                var restrictionVias = [];
 
+	                for (k = 0; k < v.length; k++) {
+	                  if (v[k].type === 'way') {
+	                    restrictionVias.push(v[k].id);
+	                  }
+	                }
 
-	/**
-	 * Get the best string value from the descriptions/labels result
-	 * Note that if mediawiki doesn't recognize language code, it will return all values.
-	 * In that case, fallback to use English.
-	 * @param values object - either descriptions or labels
-	 * @param langCode String
-	 * @returns localized string
-	 */
-	function localizedToString(values, langCode) {
-	    if (values) {
-	        values = values[langCode] || values.en;
-	    }
-	    return values ? values.value : '';
-	}
+	                var diff = utilArrayDifference(pathVias, restrictionVias);
+	                matchesViaTo = !diff.length;
+	              }
+	            } else if (isOnly) {
+	              for (k = 0; k < v.length; k++) {
+	                // way doesn't match TO, but is one of the via ways along the path of an "only"
+	                if (v[k].type === 'way' && v[k].id === way.id) {
+	                  isAlongOnlyPath = true;
+	                  break;
+	                }
+	              }
+	            }
 
+	            if (matchesViaTo) {
+	              if (isOnly) {
+	                restrict = {
+	                  id: restriction.id,
+	                  direct: matchesFrom,
+	                  from: f.id,
+	                  only: true,
+	                  end: true
+	                };
+	              } else {
+	                restrict = {
+	                  id: restriction.id,
+	                  direct: matchesFrom,
+	                  from: f.id,
+	                  no: true,
+	                  end: true
+	                };
+	              }
+	            } else {
+	              // indirect - caused by a different nearby restriction
+	              if (isAlongOnlyPath) {
+	                restrict = {
+	                  id: restriction.id,
+	                  direct: false,
+	                  from: f.id,
+	                  only: true,
+	                  end: false
+	                };
+	              } else if (isOnly) {
+	                restrict = {
+	                  id: restriction.id,
+	                  direct: false,
+	                  from: f.id,
+	                  no: true,
+	                  end: true
+	                };
+	              }
+	            } // stop looking if we find a "direct" restriction (matching FROM, VIA, TO)
 
-	var serviceOsmWikibase = {
 
-	    init: function() {
-	        _inflight$1 = {};
-	        _wikibaseCache = {};
-	        _localeIDs = {};
-	    },
+	            if (restrict && restrict.direct) break;
+	          }
 
+	          nextWays.push({
+	            way: way,
+	            restrict: restrict
+	          });
+	        }
 
-	    reset: function() {
-	        Object.values(_inflight$1).forEach(function(controller) { controller.abort(); });
-	        _inflight$1 = {};
-	    },
+	        nextWays.forEach(function (nextWay) {
+	          step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
+	        });
+	      } else {
+	        // entity.type === 'way'
+	        if (currPath.length >= 3) {
+	          // this is a "complete" path..
+	          var turnPath = currPath.slice(); // shallow copy
+	          // an indirect restriction - only include the partial path (starting at FROM)
+
+	          if (matchedRestriction && matchedRestriction.direct === false) {
+	            for (i = 0; i < turnPath.length; i++) {
+	              if (turnPath[i] === matchedRestriction.from) {
+	                turnPath = turnPath.slice(i);
+	                break;
+	              }
+	            }
+	          }
 
+	          var turn = pathToTurn(turnPath);
 
-	    /**
-	     * Get the best value for the property, or undefined if not found
-	     * @param entity object from wikibase
-	     * @param property string e.g. 'P4' for image
-	     * @param langCode string e.g. 'fr' for French
-	     */
-	    claimToValue: function(entity, property, langCode) {
-	        if (!entity.claims[property]) { return undefined; }
-	        var locale = _localeIDs[langCode];
-	        var preferredPick, localePick;
-
-	        entity.claims[property].forEach(function(stmt) {
-	            // If exists, use value limited to the needed language (has a qualifier P26 = locale)
-	            // Or if not found, use the first value with the "preferred" rank
-	            if (!preferredPick && stmt.rank === 'preferred') {
-	                preferredPick = stmt;
+	          if (turn) {
+	            if (matchedRestriction) {
+	              turn.restrictionID = matchedRestriction.id;
+	              turn.no = matchedRestriction.no;
+	              turn.only = matchedRestriction.only;
+	              turn.direct = matchedRestriction.direct;
 	            }
-	            if (locale && stmt.qualifiers && stmt.qualifiers.P26 &&
-	                stmt.qualifiers.P26[0].datavalue.value.id === locale
-	            ) {
-	                localePick = stmt;
-	            }
-	        });
-
-	        var result = localePick || preferredPick;
-	        if (result) {
-	            var datavalue = result.mainsnak.datavalue;
-	            return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
-	        } else {
-	            return undefined;
-	        }
-	    },
 
+	            turns.push(osmTurn(turn));
+	          }
 
-	    /**
-	     * Convert monolingual property into a key-value object (language -> value)
-	     * @param entity object from wikibase
-	     * @param property string e.g. 'P31' for monolingual wiki page title
-	     */
-	    monolingualClaimToValueObj: function(entity, property) {
-	        if (!entity || !entity.claims[property]) { return undefined; }
-
-	        return entity.claims[property].reduce(function(acc, obj) {
-	            var value = obj.mainsnak.datavalue.value;
-	            acc[value.language] = value.text;
-	            return acc;
-	        }, {});
-	    },
+	          if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
+	        }
 
+	        if (matchedRestriction && matchedRestriction.end) return; // don't advance any further
+	        // which nodes can we step into?
 
-	    toSitelink: function(key, value) {
-	        var result = value ? ('Tag:' + key + '=' + value) : 'Key:' + key;
-	        return result.replace(/_/g, ' ').trim();
-	    },
+	        var n1 = vgraph.entity(entity.first());
+	        var n2 = vgraph.entity(entity.last());
+	        var dist = geoSphericalDistance(n1.loc, n2.loc);
+	        var nextNodes = [];
 
+	        if (currPath.length > 1) {
+	          if (dist > maxDistance) return; // the next node is too far
 
-	    //
-	    // Pass params object of the form:
-	    // {
-	    //   key: 'string',
-	    //   value: 'string',
-	    //   rtype: 'string',
-	    //   langCode: 'string'
-	    // }
-	    //
-	    getEntity: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest : request;
-	        var that = this;
-	        var titles = [];
-	        var result = {};
-	        var rtypeSitelink = params.rtype ? ('Relation:' + params.rtype).replace(/_/g, ' ').trim() : false;
-	        var keySitelink = params.key ? this.toSitelink(params.key) : false;
-	        var tagSitelink = (params.key && params.value) ? this.toSitelink(params.key, params.value) : false;
-	        var localeSitelink;
-
-	        if (params.langCode && _localeIDs[params.langCode] === undefined) {
-	            // If this is the first time we are asking about this locale,
-	            // fetch corresponding entity (if it exists), and cache it.
-	            // If there is no such entry, cache `false` value to avoid re-requesting it.
-	            localeSitelink = ('Locale:' + params.langCode).replace(/_/g, ' ').trim();
-	            titles.push(localeSitelink);
-	        }
-
-	        if (rtypeSitelink) {
-	            if (_wikibaseCache[rtypeSitelink]) {
-	                result.rtype = _wikibaseCache[rtypeSitelink];
-	            } else {
-	                titles.push(rtypeSitelink);
-	            }
+	          if (!entity.__via) return; // this way is a leaf / can't be a via
 	        }
 
-	        if (keySitelink) {
-	            if (_wikibaseCache[keySitelink]) {
-	                result.key = _wikibaseCache[keySitelink];
-	            } else {
-	                titles.push(keySitelink);
-	            }
+	        if (!entity.__oneWay && // bidirectional..
+	        keyVertexIds.indexOf(n1.id) !== -1 && // key vertex..
+	        currPath.indexOf(n1.id) === -1) {
+	          // haven't seen it yet..
+	          nextNodes.push(n1); // can advance to first node
 	        }
 
-	        if (tagSitelink) {
-	            if (_wikibaseCache[tagSitelink]) {
-	                result.tag = _wikibaseCache[tagSitelink];
-	            } else {
-	                titles.push(tagSitelink);
-	            }
+	        if (keyVertexIds.indexOf(n2.id) !== -1 && // key vertex..
+	        currPath.indexOf(n2.id) === -1) {
+	          // haven't seen it yet..
+	          nextNodes.push(n2); // can advance to last node
 	        }
 
-	        if (!titles.length) {
-	            // Nothing to do, we already had everything in the cache
-	            return callback(null, result);
-	        }
-
-	        // Requesting just the user language code
-	        // If backend recognizes the code, it will perform proper fallbacks,
-	        // and the result will contain the requested code. If not, all values are returned:
-	        // {"zh-tw":{"value":"...","language":"zh-tw","source-language":"zh-hant"}
-	        // {"pt-br":{"value":"...","language":"pt","for-language":"pt-br"}}
-	        var obj = {
-	            action: 'wbgetentities',
-	            sites: 'wiki',
-	            titles: titles.join('|'),
-	            languages: params.langCode,
-	            languagefallback: 1,
-	            origin: '*',
-	            format: 'json',
-	            // There is an MW Wikibase API bug https://phabricator.wikimedia.org/T212069
-	            // We shouldn't use v1 until it gets fixed, but should switch to it afterwards
-	            // formatversion: 2,
-	        };
+	        nextNodes.forEach(function (nextNode) {
+	          // gather restrictions FROM this way
+	          var fromRestrictions = vgraph.parentRelations(entity).filter(function (r) {
+	            if (!r.isRestriction()) return false;
+	            var f = r.memberByRole('from');
+	            if (!f || f.id !== entity.id) return false;
+	            var isOnly = /^only_/.test(r.tags.restriction);
+	            if (!isOnly) return true; // `only_` restrictions only matter along the direction of the VIA - #4849
 
-	        var url = apibase$3 + '?' + utilQsString(obj);
-	        doRequest(url, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else if (!d.success || d.error) {
-	                callback(d.error.messages.map(function(v) { return v.html['*']; }).join('<br>'));
-	            } else {
-	                var localeID = false;
-	                Object.values(d.entities).forEach(function(res) {
-	                    if (res.missing !== '') {
-	                        // Simplify access to the localized values
-	                        res.description = localizedToString(res.descriptions, params.langCode);
-	                        res.label = localizedToString(res.labels, params.langCode);
-
-	                        var title = res.sitelinks.wiki.title;
-	                        if (title === rtypeSitelink) {
-	                            _wikibaseCache[rtypeSitelink] = res;
-	                            result.rtype = res;
-	                        } else if (title === keySitelink) {
-	                            _wikibaseCache[keySitelink] = res;
-	                            result.key = res;
-	                        } else if (title === tagSitelink) {
-	                            _wikibaseCache[tagSitelink] = res;
-	                            result.tag = res;
-	                        } else if (title === localeSitelink) {
-	                            localeID = res.id;
-	                        } else {
-	                            console.log('Unexpected title ' + title);  // eslint-disable-line no-console
-	                        }
-	                    }
-	                });
+	            var isOnlyVia = false;
+	            var v = r.membersByRole('via');
 
-	                if (localeSitelink) {
-	                    // If locale ID is not found, store false to prevent repeated queries
-	                    that.addLocale(params.langCode, localeID);
+	            if (v.length === 1 && v[0].type === 'node') {
+	              // via node
+	              isOnlyVia = v[0].id === nextNode.id;
+	            } else {
+	              // via way(s)
+	              for (var i = 0; i < v.length; i++) {
+	                if (v[i].type !== 'way') continue;
+	                var viaWay = vgraph.entity(v[i].id);
+
+	                if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
+	                  isOnlyVia = true;
+	                  break;
 	                }
-
-	                callback(null, result);
+	              }
 	            }
+
+	            return isOnlyVia;
+	          });
+	          step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
 	        });
-	    },
+	      }
+	    } // assumes path is alternating way-node-way of odd length
+
+
+	    function pathToTurn(path) {
+	      if (path.length < 3) return;
+	      var fromWayId, fromNodeId, fromVertexId;
+	      var toWayId, toNodeId, toVertexId;
+	      var viaWayIds, viaNodeId, isUturn;
+	      fromWayId = path[0];
+	      toWayId = path[path.length - 1];
+
+	      if (path.length === 3 && fromWayId === toWayId) {
+	        // u turn
+	        var way = vgraph.entity(fromWayId);
+	        if (way.__oneWay) return null;
+	        isUturn = true;
+	        viaNodeId = fromVertexId = toVertexId = path[1];
+	        fromNodeId = toNodeId = adjacentNode(fromWayId, viaNodeId);
+	      } else {
+	        isUturn = false;
+	        fromVertexId = path[1];
+	        fromNodeId = adjacentNode(fromWayId, fromVertexId);
+	        toVertexId = path[path.length - 2];
+	        toNodeId = adjacentNode(toWayId, toVertexId);
+
+	        if (path.length === 3) {
+	          viaNodeId = path[1];
+	        } else {
+	          viaWayIds = path.filter(function (entityId) {
+	            return entityId[0] === 'w';
+	          });
+	          viaWayIds = viaWayIds.slice(1, viaWayIds.length - 1); // remove first, last
+	        }
+	      }
 
+	      return {
+	        key: path.join('_'),
+	        path: path,
+	        from: {
+	          node: fromNodeId,
+	          way: fromWayId,
+	          vertex: fromVertexId
+	        },
+	        via: {
+	          node: viaNodeId,
+	          ways: viaWayIds
+	        },
+	        to: {
+	          node: toNodeId,
+	          way: toWayId,
+	          vertex: toVertexId
+	        },
+	        u: isUturn
+	      };
 
-	    //
-	    // Pass params object of the form:
-	    // {
-	    //   key: 'string',     // required
-	    //   value: 'string'    // optional
-	    // }
-	    //   -or-
-	    // {
-	    //   rtype: 'rtype'     // relation type  (e.g. 'multipolygon')
-	    // }
-	    //
-	    // Get an result object used to display tag documentation
-	    // {
-	    //   title:        'string',
-	    //   description:  'string',
-	    //   editURL:      'string',
-	    //   imageURL:     'string',
-	    //   wiki:         { title: 'string', text: 'string', url: 'string' }
-	    // }
-	    //
-	    getDocs: function(params, callback) {
-	        var that = this;
-	        var langCode = _mainLocalizer.localeCode().toLowerCase();
-	        params.langCode = langCode;
+	      function adjacentNode(wayId, affixId) {
+	        var nodes = vgraph.entity(wayId).nodes;
+	        return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
+	      }
+	    }
+	  };
 
-	        this.getEntity(params, function(err, data) {
-	            if (err) {
-	                callback(err);
-	                return;
-	            }
+	  return intersection;
+	}
+	function osmInferRestriction(graph, turn, projection) {
+	  var fromWay = graph.entity(turn.from.way);
+	  var fromNode = graph.entity(turn.from.node);
+	  var fromVertex = graph.entity(turn.from.vertex);
+	  var toWay = graph.entity(turn.to.way);
+	  var toNode = graph.entity(turn.to.node);
+	  var toVertex = graph.entity(turn.to.vertex);
+	  var fromOneWay = fromWay.tags.oneway === 'yes';
+	  var toOneWay = toWay.tags.oneway === 'yes';
+	  var angle = (geoAngle(fromVertex, fromNode, projection) - geoAngle(toVertex, toNode, projection)) * 180 / Math.PI;
 
-	            var entity = data.rtype || data.tag || data.key;
-	            if (!entity) {
-	                callback('No entity');
-	                return;
-	            }
+	  while (angle < 0) {
+	    angle += 360;
+	  }
 
-	            // prepare result
-	            var result = {
-	                title: entity.title,
-	                description: entity.description,
-	                editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
-	            };
+	  if (fromNode === toNode) return 'no_u_turn';
+	  if ((angle < 23 || angle > 336) && fromOneWay && toOneWay) return 'no_u_turn'; // wider tolerance for u-turn if both ways are oneway
 
-	            // add image
-	            if (entity.claims) {
-	                var imageroot;
-	                var image = that.claimToValue(entity, 'P4', langCode);
-	                if (image) {
-	                    imageroot = 'https://commons.wikimedia.org/w/index.php';
-	                } else {
-	                    image = that.claimToValue(entity, 'P28', langCode);
-	                    if (image) {
-	                        imageroot = 'https://wiki.openstreetmap.org/w/index.php';
-	                    }
-	                }
-	                if (imageroot && image) {
-	                    result.imageURL = imageroot + '?' + utilQsString({
-	                        title: 'Special:Redirect/file/' + image,
-	                        width: 400
-	                    });
-	                }
-	            }
+	  if ((angle < 40 || angle > 319) && fromOneWay && toOneWay && turn.from.vertex !== turn.to.vertex) return 'no_u_turn'; // even wider tolerance for u-turn if there is a via way (from !== to)
 
-	            // Try to get a wiki page from tag data item first, followed by the corresponding key data item.
-	            // If neither tag nor key data item contain a wiki page in the needed language nor English,
-	            // get the first found wiki page from either the tag or the key item.
-	            var rtypeWiki = that.monolingualClaimToValueObj(data.rtype, 'P31');
-	            var tagWiki = that.monolingualClaimToValueObj(data.tag, 'P31');
-	            var keyWiki = that.monolingualClaimToValueObj(data.key, 'P31');
-
-	            // If exact language code does not exist, try to find the first part before the '-'
-	            // BUG: in some cases, a more elaborate fallback logic might be needed
-	            var langPrefix = langCode.split('-', 2)[0];
-
-	            // use the first acceptable wiki page
-	            result.wiki =
-	                getWikiInfo(rtypeWiki, langCode, 'inspector.wiki_reference') ||
-	                getWikiInfo(rtypeWiki, langPrefix, 'inspector.wiki_reference') ||
-	                getWikiInfo(rtypeWiki, 'en', 'inspector.wiki_en_reference') ||
-	                getWikiInfo(tagWiki, langCode, 'inspector.wiki_reference') ||
-	                getWikiInfo(tagWiki, langPrefix, 'inspector.wiki_reference') ||
-	                getWikiInfo(tagWiki, 'en', 'inspector.wiki_en_reference') ||
-	                getWikiInfo(keyWiki, langCode, 'inspector.wiki_reference') ||
-	                getWikiInfo(keyWiki, langPrefix, 'inspector.wiki_reference') ||
-	                getWikiInfo(keyWiki, 'en', 'inspector.wiki_en_reference');
-
-	            callback(null, result);
-
-
-	            // Helper method to get wiki info if a given language exists
-	            function getWikiInfo(wiki, langCode, tKey) {
-	                if (wiki && wiki[langCode]) {
-	                    return {
-	                        title: wiki[langCode],
-	                        text: tKey,
-	                        url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
-	                    };
-	                }
-	            }
-	        });
-	    },
+	  if (angle < 158) return 'no_right_turn';
+	  if (angle > 202) return 'no_left_turn';
+	  return 'no_straight_on';
+	}
 
+	function actionMergePolygon(ids, newRelationId) {
+	  function groupEntities(graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    var geometryGroups = utilArrayGroupBy(entities, function (entity) {
+	      if (entity.type === 'way' && entity.isClosed()) {
+	        return 'closedWay';
+	      } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+	        return 'multipolygon';
+	      } else {
+	        return 'other';
+	      }
+	    });
+	    return Object.assign({
+	      closedWay: [],
+	      multipolygon: [],
+	      other: []
+	    }, geometryGroups);
+	  }
 
-	    addLocale: function(langCode, qid) {
-	        // Makes it easier to unit test
-	        _localeIDs[langCode] = qid;
-	    },
+	  var action = function action(graph) {
+	    var entities = groupEntities(graph); // An array representing all the polygons that are part of the multipolygon.
+	    //
+	    // Each element is itself an array of objects with an id property, and has a
+	    // locs property which is an array of the locations forming the polygon.
+
+	    var polygons = entities.multipolygon.reduce(function (polygons, m) {
+	      return polygons.concat(osmJoinWays(m.members, graph));
+	    }, []).concat(entities.closedWay.map(function (d) {
+	      var member = [{
+	        id: d.id
+	      }];
+	      member.nodes = graph.childNodes(d);
+	      return member;
+	    })); // contained is an array of arrays of boolean values,
+	    // where contained[j][k] is true iff the jth way is
+	    // contained by the kth way.
+
+	    var contained = polygons.map(function (w, i) {
+	      return polygons.map(function (d, n) {
+	        if (i === n) return null;
+	        return geoPolygonContainsPolygon(d.nodes.map(function (n) {
+	          return n.loc;
+	        }), w.nodes.map(function (n) {
+	          return n.loc;
+	        }));
+	      });
+	    }); // Sort all polygons as either outer or inner ways
 
+	    var members = [];
+	    var outer = true;
 
-	    apibase: function(val) {
-	        if (!arguments.length) { return apibase$3; }
-	        apibase$3 = val;
-	        return this;
+	    while (polygons.length) {
+	      extractUncontained(polygons);
+	      polygons = polygons.filter(isContained);
+	      contained = contained.filter(isContained).map(filterContained);
 	    }
 
-	};
+	    function isContained(d, i) {
+	      return contained[i].some(function (val) {
+	        return val;
+	      });
+	    }
 
-	var jsonpCache = {};
-	window.jsonpCache = jsonpCache;
+	    function filterContained(d) {
+	      return d.filter(isContained);
+	    }
 
-	function jsonpRequest(url, callback) {
-	    var request = {
-	        abort: function() {}
-	    };
+	    function extractUncontained(polygons) {
+	      polygons.forEach(function (d, i) {
+	        if (!isContained(d, i)) {
+	          d.forEach(function (member) {
+	            members.push({
+	              type: 'way',
+	              id: member.id,
+	              role: outer ? 'outer' : 'inner'
+	            });
+	          });
+	        }
+	      });
+	      outer = !outer;
+	    } // Move all tags to one relation
 
-	    if (window.JSONP_FIX) {
-	        if (window.JSONP_DELAY === 0) {
-	            callback(window.JSONP_FIX);
-	        } else {
-	            var t = window.setTimeout(function() {
-	                callback(window.JSONP_FIX);
-	            }, window.JSONP_DELAY || 0);
 
-	            request.abort = function() { window.clearTimeout(t); };
-	        }
+	    var relation = entities.multipolygon[0] || osmRelation({
+	      id: newRelationId,
+	      tags: {
+	        type: 'multipolygon'
+	      }
+	    });
+	    entities.multipolygon.slice(1).forEach(function (m) {
+	      relation = relation.mergeTags(m.tags);
+	      graph = graph.remove(m);
+	    });
+	    entities.closedWay.forEach(function (way) {
+	      function isThisOuter(m) {
+	        return m.id === way.id && m.role !== 'inner';
+	      }
 
-	        return request;
-	    }
+	      if (members.some(isThisOuter)) {
+	        relation = relation.mergeTags(way.tags);
+	        graph = graph.replace(way.update({
+	          tags: {}
+	        }));
+	      }
+	    });
+	    return graph.replace(relation.update({
+	      members: members,
+	      tags: utilObjectOmit(relation.tags, ['area'])
+	    }));
+	  };
 
-	    function rand() {
-	        var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
-	        var c = '';
-	        var i = -1;
-	        while (++i < 15) { c += chars.charAt(Math.floor(Math.random() * 52)); }
-	        return c;
-	    }
+	  action.disabled = function (graph) {
+	    var entities = groupEntities(graph);
 
-	    function create(url) {
-	        var e = url.match(/callback=(\w+)/);
-	        var c = e ? e[1] : rand();
+	    if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
+	      return 'not_eligible';
+	    }
 
-	        jsonpCache[c] = function(data) {
-	            if (jsonpCache[c]) {
-	                callback(data);
-	            }
-	            finalize();
-	        };
+	    if (!entities.multipolygon.every(function (r) {
+	      return r.isComplete(graph);
+	    })) {
+	      return 'incomplete_relation';
+	    }
 
-	        function finalize() {
-	            delete jsonpCache[c];
-	            script.remove();
+	    if (!entities.multipolygon.length) {
+	      var sharedMultipolygons = [];
+	      entities.closedWay.forEach(function (way, i) {
+	        if (i === 0) {
+	          sharedMultipolygons = graph.parentMultipolygons(way);
+	        } else {
+	          sharedMultipolygons = utilArrayIntersection(sharedMultipolygons, graph.parentMultipolygons(way));
 	        }
+	      });
+	      sharedMultipolygons = sharedMultipolygons.filter(function (relation) {
+	        return relation.members.length === entities.closedWay.length;
+	      });
 
-	        request.abort = finalize;
-	        return 'jsonpCache.' + c;
+	      if (sharedMultipolygons.length) {
+	        // don't create a new multipolygon if it'd be redundant
+	        return 'not_eligible';
+	      }
+	    } else if (entities.closedWay.some(function (way) {
+	      return utilArrayIntersection(graph.parentMultipolygons(way), entities.multipolygon).length;
+	    })) {
+	      // don't add a way to a multipolygon again if it's already a member
+	      return 'not_eligible';
 	    }
+	  };
 
-	    var cb = create(url);
+	  return action;
+	}
 
-	    var script = select('head')
-	        .append('script')
-	        .attr('type', 'text/javascript')
-	        .attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
+	var UNSUPPORTED_Y$3 = regexpStickyHelpers.UNSUPPORTED_Y;
 
-	    return request;
+	// `RegExp.prototype.flags` getter
+	// https://tc39.github.io/ecma262/#sec-get-regexp.prototype.flags
+	if (descriptors && (/./g.flags != 'g' || UNSUPPORTED_Y$3)) {
+	  objectDefineProperty.f(RegExp.prototype, 'flags', {
+	    configurable: true,
+	    get: regexpFlags
+	  });
 	}
 
-	var bubbleApi = 'https://dev.virtualearth.net/mapcontrol/HumanScaleServices/GetBubbles.ashx?';
-	var streetsideImagesApi = 'https://t.ssl.ak.tiles.virtualearth.net/tiles/';
-	var bubbleAppKey = 'AuftgJsO0Xs8Ts4M1xZUQJQXJNsvmh3IV8DkNieCiy3tCwCUMq76-WpkrBtNAuEm';
-	var pannellumViewerCSS = 'pannellum-streetside/pannellum.css';
-	var pannellumViewerJS = 'pannellum-streetside/pannellum.js';
-	var maxResults$2 = 2000;
-	var tileZoom$2 = 16.5;
-	var tiler$6 = utilTiler().zoomExtent([tileZoom$2, tileZoom$2]).skipNullIsland(true);
-	var dispatch$7 = dispatch('loadedBubbles', 'viewerChanged');
-	var minHfov = 10;         // zoom in degrees:  20, 10, 5
-	var maxHfov = 90;         // zoom out degrees
-	var defaultHfov = 45;
-
-	var _hires = false;
-	var _resolution = 512;    // higher numbers are slower - 512, 1024, 2048, 4096
-	var _currScene = 0;
-	var _ssCache;
-	var _pannellumViewer;
-	var _sceneOptions;
-	var _dataUrlArray = [];
+	var fastDeepEqual = function equal(a, b) {
+	  if (a === b) return true;
 
+	  if (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
+	    if (a.constructor !== b.constructor) return false;
+	    var length, i, keys;
 
-	/**
-	 * abortRequest().
-	 */
-	function abortRequest$6(i) {
-	  i.abort();
-	}
+	    if (Array.isArray(a)) {
+	      length = a.length;
+	      if (length != b.length) return false;
 
+	      for (i = length; i-- !== 0;) {
+	        if (!equal(a[i], b[i])) return false;
+	      }
 
-	/**
-	 * localeTimeStamp().
-	 */
-	function localeTimestamp(s) {
-	  if (!s) { return null; }
-	  var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	  var d = new Date(s);
-	  if (isNaN(d.getTime())) { return null; }
-	  return d.toLocaleString(_mainLocalizer.localeCode(), options);
-	}
+	      return true;
+	    }
 
+	    if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
+	    if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
+	    if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();
+	    keys = Object.keys(a);
+	    length = keys.length;
+	    if (length !== Object.keys(b).length) return false;
 
-	/**
-	 * loadTiles() wraps the process of generating tiles and then fetching image points for each tile.
-	 */
-	function loadTiles$2(which, url, projection, margin) {
-	  var tiles = tiler$6.margin(margin).getTiles(projection);
+	    for (i = length; i-- !== 0;) {
+	      if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
+	    }
 
-	  // abort inflight requests that are no longer needed
-	  var cache = _ssCache[which];
-	  Object.keys(cache.inflight).forEach(function (k) {
-	    var wanted = tiles.find(function (tile) { return k.indexOf(tile.id + ',') === 0; });
-	    if (!wanted) {
-	      abortRequest$6(cache.inflight[k]);
-	      delete cache.inflight[k];
+	    for (i = length; i-- !== 0;) {
+	      var key = keys[i];
+	      if (!equal(a[key], b[key])) return false;
 	    }
-	  });
 
-	  tiles.forEach(function (tile) { return loadNextTilePage$2(which, url, tile); });
-	}
+	    return true;
+	  } // true if both NaN, false otherwise
 
 
-	/**
-	 * loadNextTilePage() load data for the next tile page in line.
-	 */
-	function loadNextTilePage$2(which, url, tile) {
-	  var cache = _ssCache[which];
-	  var nextPage = cache.nextPage[tile.id] || 0;
-	  var id = tile.id + ',' + String(nextPage);
-	  if (cache.loaded[id] || cache.inflight[id]) { return; }
+	  return a !== a && b !== b;
+	};
 
-	  cache.inflight[id] = getBubbles(url, tile, function (bubbles) {
-	    cache.loaded[id] = true;
-	    delete cache.inflight[id];
-	    if (!bubbles) { return; }
+	// J. W. Hunt and M. D. McIlroy, An algorithm for differential buffer
+	// comparison, Bell Telephone Laboratories CSTR #41 (1976)
+	// http://www.cs.dartmouth.edu/~doug/
+	// https://en.wikipedia.org/wiki/Longest_common_subsequence_problem
+	//
+	// Expects two arrays, finds longest common sequence
 
-	    // [].shift() removes the first element, some statistics info, not a bubble point
-	    bubbles.shift();
+	function LCS(buffer1, buffer2) {
+	  var equivalenceClasses = {};
 
-	    var features = bubbles.map(function (bubble) {
-	      if (cache.points[bubble.id]) { return null; }  // skip duplicates
+	  for (var j = 0; j < buffer2.length; j++) {
+	    var item = buffer2[j];
 
-	      var loc = [bubble.lo, bubble.la];
-	      var d = {
-	        loc: loc,
-	        key: bubble.id,
-	        ca: bubble.he,
-	        captured_at: bubble.cd,
-	        captured_by: 'microsoft',
-	        // nbn: bubble.nbn,
-	        // pbn: bubble.pbn,
-	        // ad: bubble.ad,
-	        // rn: bubble.rn,
-	        pr: bubble.pr,  // previous
-	        ne: bubble.ne,  // next
-	        pano: true,
-	        sequenceKey: null
-	      };
+	    if (equivalenceClasses[item]) {
+	      equivalenceClasses[item].push(j);
+	    } else {
+	      equivalenceClasses[item] = [j];
+	    }
+	  }
 
-	      cache.points[bubble.id] = d;
+	  var NULLRESULT = {
+	    buffer1index: -1,
+	    buffer2index: -1,
+	    chain: null
+	  };
+	  var candidates = [NULLRESULT];
 
-	      // a sequence starts here
-	      if (bubble.pr === undefined) {
-	        cache.leaders.push(bubble.id);
-	      }
+	  for (var i = 0; i < buffer1.length; i++) {
+	    var _item = buffer1[i];
+	    var buffer2indices = equivalenceClasses[_item] || [];
+	    var r = 0;
+	    var c = candidates[0];
 
-	      return {
-	        minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-	      };
+	    for (var jx = 0; jx < buffer2indices.length; jx++) {
+	      var _j = buffer2indices[jx];
+	      var s = void 0;
 
-	    }).filter(Boolean);
+	      for (s = r; s < candidates.length; s++) {
+	        if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
+	          break;
+	        }
+	      }
 
-	    cache.rtree.load(features);
+	      if (s < candidates.length) {
+	        var newCandidate = {
+	          buffer1index: i,
+	          buffer2index: _j,
+	          chain: candidates[s]
+	        };
 
-	    connectSequences();
+	        if (r === candidates.length) {
+	          candidates.push(c);
+	        } else {
+	          candidates[r] = c;
+	        }
 
-	    if (which === 'bubbles') {
-	      dispatch$7.call('loadedBubbles');
+	        r = s + 1;
+	        c = newCandidate;
+
+	        if (r === candidates.length) {
+	          break; // no point in examining further (j)s
+	        }
+	      }
 	    }
-	  });
-	}
 
+	    candidates[r] = c;
+	  } // At this point, we know the LCS: it's in the reverse of the
+	  // linked-list through .chain of candidates[candidates.length - 1].
 
-	// call this sometimes to connect the bubbles into sequences
-	function connectSequences() {
-	  var cache = _ssCache.bubbles;
-	  var keepLeaders = [];
 
-	  for (var i = 0; i < cache.leaders.length; i++) {
-	    var bubble = cache.points[cache.leaders[i]];
-	    var seen = {};
+	  return candidates[candidates.length - 1];
+	} // We apply the LCS to build a 'comm'-style picture of the
+	// offsets and lengths of mismatched chunks in the input
+	// buffers. This is used by diff3MergeRegions.
 
-	    // try to make a sequence.. use the key of the leader bubble.
-	    var sequence = { key: bubble.key, bubbles: [] };
-	    var complete = false;
 
-	    do {
-	      sequence.bubbles.push(bubble);
-	      seen[bubble.key] = true;
+	function diffIndices(buffer1, buffer2) {
+	  var lcs = LCS(buffer1, buffer2);
+	  var result = [];
+	  var tail1 = buffer1.length;
+	  var tail2 = buffer2.length;
 
-	      if (bubble.ne === undefined) {
-	        complete = true;
-	      } else {
-	        bubble = cache.points[bubble.ne];  // advance to next
-	      }
-	    } while (bubble && !seen[bubble.key] && !complete);
+	  for (var candidate = lcs; candidate !== null; candidate = candidate.chain) {
+	    var mismatchLength1 = tail1 - candidate.buffer1index - 1;
+	    var mismatchLength2 = tail2 - candidate.buffer2index - 1;
+	    tail1 = candidate.buffer1index;
+	    tail2 = candidate.buffer2index;
+
+	    if (mismatchLength1 || mismatchLength2) {
+	      result.push({
+	        buffer1: [tail1 + 1, mismatchLength1],
+	        buffer1Content: buffer1.slice(tail1 + 1, tail1 + 1 + mismatchLength1),
+	        buffer2: [tail2 + 1, mismatchLength2],
+	        buffer2Content: buffer2.slice(tail2 + 1, tail2 + 1 + mismatchLength2)
+	      });
+	    }
+	  }
 
+	  result.reverse();
+	  return result;
+	} // We apply the LCS to build a JSON representation of a
+	// independently derived from O, returns a fairly complicated
+	// internal representation of merge decisions it's taken. The
+	// interested reader may wish to consult
+	//
+	// Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce.
+	// 'A Formal Investigation of ' In Arvind and Prasad,
+	// editors, Foundations of Software Technology and Theoretical
+	// Computer Science (FSTTCS), December 2007.
+	//
+	// (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
+	//
 
-	    if (complete) {
-	      _ssCache.sequences[sequence.key] = sequence;
 
-	      // assign bubbles to the sequence
-	      for (var j = 0; j < sequence.bubbles.length; j++) {
-	        sequence.bubbles[j].sequenceKey = sequence.key;
-	      }
+	function diff3MergeRegions(a, o, b) {
+	  // "hunks" are array subsets where `a` or `b` are different from `o`
+	  // https://www.gnu.org/software/diffutils/manual/html_node/diff3-Hunks.html
+	  var hunks = [];
 
-	      // create a GeoJSON LineString
-	      sequence.geojson = {
-	        type: 'LineString',
-	        properties: { key: sequence.key },
-	        coordinates: sequence.bubbles.map(function (d) { return d.loc; })
-	      };
+	  function addHunk(h, ab) {
+	    hunks.push({
+	      ab: ab,
+	      oStart: h.buffer1[0],
+	      oLength: h.buffer1[1],
+	      // length of o to remove
+	      abStart: h.buffer2[0],
+	      abLength: h.buffer2[1] // length of a/b to insert
+	      // abContent: (ab === 'a' ? a : b).slice(h.buffer2[0], h.buffer2[0] + h.buffer2[1])
 
-	    } else {
-	      keepLeaders.push(cache.leaders[i]);
-	    }
+	    });
 	  }
 
-	  // couldn't complete these, save for later
-	  cache.leaders = keepLeaders;
-	}
-
-
-	/**
-	 * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
-	 */
-	function getBubbles(url, tile, callback) {
-	  var rect = tile.extent.rectangle();
-	  var urlForRequest = url + utilQsString({
-	    n: rect[3],
-	    s: rect[1],
-	    e: rect[2],
-	    w: rect[0],
-	    c: maxResults$2,
-	    appkey: bubbleAppKey,
-	    jsCallback: '{callback}'
+	  diffIndices(o, a).forEach(function (item) {
+	    return addHunk(item, 'a');
 	  });
-
-	  return jsonpRequest(urlForRequest, function (data) {
-	    if (!data || data.error) {
-	      callback(null);
-	    } else {
-	      callback(data);
-	    }
+	  diffIndices(o, b).forEach(function (item) {
+	    return addHunk(item, 'b');
 	  });
-	}
-
-
-	// partition viewport into higher zoom tiles
-	function partitionViewport$2(projection) {
-	  var z = geoScaleToZoom(projection.scale());
-	  var z2 = (Math.ceil(z * 2) / 2) + 2.5;   // round to next 0.5 and add 2.5
-	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  hunks.sort(function (x, y) {
+	    return x.oStart - y.oStart;
+	  });
+	  var results = [];
+	  var currOffset = 0;
 
-	  return tiler.getTiles(projection)
-	    .map(function (tile) { return tile.extent; });
-	}
+	  function advanceTo(endOffset) {
+	    if (endOffset > currOffset) {
+	      results.push({
+	        stable: true,
+	        buffer: 'o',
+	        bufferStart: currOffset,
+	        bufferLength: endOffset - currOffset,
+	        bufferContent: o.slice(currOffset, endOffset)
+	      });
+	      currOffset = endOffset;
+	    }
+	  }
 
+	  while (hunks.length) {
+	    var hunk = hunks.shift();
+	    var regionStart = hunk.oStart;
+	    var regionEnd = hunk.oStart + hunk.oLength;
+	    var regionHunks = [hunk];
+	    advanceTo(regionStart); // Try to pull next overlapping hunk into this region
 
-	// no more than `limit` results per partition.
-	function searchLimited$2(limit, projection, rtree) {
-	  limit = limit || 5;
+	    while (hunks.length) {
+	      var nextHunk = hunks[0];
+	      var nextHunkStart = nextHunk.oStart;
+	      if (nextHunkStart > regionEnd) break; // no overlap
 
-	  return partitionViewport$2(projection)
-	    .reduce(function (result, extent) {
-	      var found = rtree.search(extent.bbox())
-	        .slice(0, limit)
-	        .map(function (d) { return d.data; });
+	      regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
+	      regionHunks.push(hunks.shift());
+	    }
 
-	      return (found.length ? result.concat(found) : result);
-	    }, []);
-	}
+	    if (regionHunks.length === 1) {
+	      // Only one hunk touches this region, meaning that there is no conflict here.
+	      // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
+	      if (hunk.abLength > 0) {
+	        var buffer = hunk.ab === 'a' ? a : b;
+	        results.push({
+	          stable: true,
+	          buffer: hunk.ab,
+	          bufferStart: hunk.abStart,
+	          bufferLength: hunk.abLength,
+	          bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
+	        });
+	      }
+	    } else {
+	      // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
+	      // Effectively merge all the `a` hunks into one giant hunk, then do the
+	      // same for the `b` hunks; then, correct for skew in the regions of `o`
+	      // that each side changed, and report appropriate spans for the three sides.
+	      var bounds = {
+	        a: [a.length, -1, o.length, -1],
+	        b: [b.length, -1, o.length, -1]
+	      };
 
+	      while (regionHunks.length) {
+	        hunk = regionHunks.shift();
+	        var oStart = hunk.oStart;
+	        var oEnd = oStart + hunk.oLength;
+	        var abStart = hunk.abStart;
+	        var abEnd = abStart + hunk.abLength;
+	        var _b = bounds[hunk.ab];
+	        _b[0] = Math.min(abStart, _b[0]);
+	        _b[1] = Math.max(abEnd, _b[1]);
+	        _b[2] = Math.min(oStart, _b[2]);
+	        _b[3] = Math.max(oEnd, _b[3]);
+	      }
 
-	/**
-	 * loadImage()
-	 */
-	function loadImage(imgInfo) {
-	  return new Promise(function (resolve) {
-	    var img = new Image();
-	    img.onload = function () {
-	      var canvas = document.getElementById('ideditor-canvas' + imgInfo.face);
-	      var ctx = canvas.getContext('2d');
-	      ctx.drawImage(img, imgInfo.x, imgInfo.y);
-	      resolve({ imgInfo: imgInfo, status: 'ok' });
-	    };
-	    img.onerror = function () {
-	      resolve({ data: imgInfo, status: 'error' });
-	    };
-	    img.setAttribute('crossorigin', '');
-	    img.src = imgInfo.url;
-	  });
-	}
+	      var aStart = bounds.a[0] + (regionStart - bounds.a[2]);
+	      var aEnd = bounds.a[1] + (regionEnd - bounds.a[3]);
+	      var bStart = bounds.b[0] + (regionStart - bounds.b[2]);
+	      var bEnd = bounds.b[1] + (regionEnd - bounds.b[3]);
+	      var result = {
+	        stable: false,
+	        aStart: aStart,
+	        aLength: aEnd - aStart,
+	        aContent: a.slice(aStart, aEnd),
+	        oStart: regionStart,
+	        oLength: regionEnd - regionStart,
+	        oContent: o.slice(regionStart, regionEnd),
+	        bStart: bStart,
+	        bLength: bEnd - bStart,
+	        bContent: b.slice(bStart, bEnd)
+	      };
+	      results.push(result);
+	    }
 
+	    currOffset = regionEnd;
+	  }
 
-	/**
-	 * loadCanvas()
-	 */
-	function loadCanvas(imageGroup) {
-	  return Promise.all(imageGroup.map(loadImage))
-	    .then(function (data) {
-	      var canvas = document.getElementById('ideditor-canvas' + data[0].imgInfo.face);
-	      var which = { '01': 0, '02': 1, '03': 2, '10': 3, '11': 4, '12': 5 };
-	      var face = data[0].imgInfo.face;
-	      _dataUrlArray[which[face]] = canvas.toDataURL('image/jpeg', 1.0);
-	      return { status: 'loadCanvas for face ' + data[0].imgInfo.face + 'ok'};
-	    });
-	}
+	  advanceTo(o.length);
+	  return results;
+	} // Applies the output of diff3MergeRegions to actually
+	// construct the merged buffer; the returned result alternates
+	// between 'ok' and 'conflict' blocks.
+	// A "false conflict" is where `a` and `b` both change the same from `o`
 
 
-	/**
-	 * loadFaces()
-	 */
-	function loadFaces(faceGroup) {
-	  return Promise.all(faceGroup.map(loadCanvas))
-	    .then(function () { return { status: 'loadFaces done' }; });
-	}
+	function diff3Merge(a, o, b, options) {
+	  var defaults = {
+	    excludeFalseConflicts: true,
+	    stringSeparator: /\s+/
+	  };
+	  options = Object.assign(defaults, options);
+	  var aString = typeof a === 'string';
+	  var oString = typeof o === 'string';
+	  var bString = typeof b === 'string';
+	  if (aString) a = a.split(options.stringSeparator);
+	  if (oString) o = o.split(options.stringSeparator);
+	  if (bString) b = b.split(options.stringSeparator);
+	  var results = [];
+	  var regions = diff3MergeRegions(a, o, b);
+	  var okBuffer = [];
 
+	  function flushOk() {
+	    if (okBuffer.length) {
+	      results.push({
+	        ok: okBuffer
+	      });
+	    }
 
-	function setupCanvas(selection, reset) {
-	  if (reset) {
-	    selection.selectAll('#ideditor-stitcher-canvases')
-	      .remove();
+	    okBuffer = [];
 	  }
 
-	  // Add the Streetside working canvases. These are used for 'stitching', or combining,
-	  // multiple images for each of the six faces, before passing to the Pannellum control as DataUrls
-	  selection.selectAll('#ideditor-stitcher-canvases')
-	    .data([0])
-	    .enter()
-	    .append('div')
-	    .attr('id', 'ideditor-stitcher-canvases')
-	    .attr('display', 'none')
-	    .selectAll('canvas')
-	    .data(['canvas01', 'canvas02', 'canvas03', 'canvas10', 'canvas11', 'canvas12'])
-	    .enter()
-	    .append('canvas')
-	    .attr('id', function (d) { return 'ideditor-' + d; })
-	    .attr('width', _resolution)
-	    .attr('height', _resolution);
-	}
+	  function isFalseConflict(a, b) {
+	    if (a.length !== b.length) return false;
 
+	    for (var i = 0; i < a.length; i++) {
+	      if (a[i] !== b[i]) return false;
+	    }
 
-	function qkToXY(qk) {
-	  var x = 0;
-	  var y = 0;
-	  var scale = 256;
-	  for (var i = qk.length; i > 0; i--) {
-	    var key = qk[i-1];
-	    x += (+(key === '1' || key === '3')) * scale;
-	    y += (+(key === '2' || key === '3')) * scale;
-	    scale *= 2;
+	    return true;
 	  }
-	  return [x, y];
-	}
-
 
-	function getQuadKeys() {
-	  var dim = _resolution / 256;
-	  var quadKeys;
+	  regions.forEach(function (region) {
+	    if (region.stable) {
+	      var _okBuffer;
 
-	  if (dim === 16) {
-	    quadKeys = [
-	      '0000','0001','0010','0011','0100','0101','0110','0111',  '1000','1001','1010','1011','1100','1101','1110','1111',
-	      '0002','0003','0012','0013','0102','0103','0112','0113',  '1002','1003','1012','1013','1102','1103','1112','1113',
-	      '0020','0021','0030','0031','0120','0121','0130','0131',  '1020','1021','1030','1031','1120','1121','1130','1131',
-	      '0022','0023','0032','0033','0122','0123','0132','0133',  '1022','1023','1032','1033','1122','1123','1132','1133',
-	      '0200','0201','0210','0211','0300','0301','0310','0311',  '1200','1201','1210','1211','1300','1301','1310','1311',
-	      '0202','0203','0212','0213','0302','0303','0312','0313',  '1202','1203','1212','1213','1302','1303','1312','1313',
-	      '0220','0221','0230','0231','0320','0321','0330','0331',  '1220','1221','1230','1231','1320','1321','1330','1331',
-	      '0222','0223','0232','0233','0322','0323','0332','0333',  '1222','1223','1232','1233','1322','1323','1332','1333',
-
-	      '2000','2001','2010','2011','2100','2101','2110','2111',  '3000','3001','3010','3011','3100','3101','3110','3111',
-	      '2002','2003','2012','2013','2102','2103','2112','2113',  '3002','3003','3012','3013','3102','3103','3112','3113',
-	      '2020','2021','2030','2031','2120','2121','2130','2131',  '3020','3021','3030','3031','3120','3121','3130','3131',
-	      '2022','2023','2032','2033','2122','2123','2132','2133',  '3022','3023','3032','3033','3122','3123','3132','3133',
-	      '2200','2201','2210','2211','2300','2301','2310','2311',  '3200','3201','3210','3211','3300','3301','3310','3311',
-	      '2202','2203','2212','2213','2302','2303','2312','2313',  '3202','3203','3212','3213','3302','3303','3312','3313',
-	      '2220','2221','2230','2231','2320','2321','2330','2331',  '3220','3221','3230','3231','3320','3321','3330','3331',
-	      '2222','2223','2232','2233','2322','2323','2332','2333',  '3222','3223','3232','3233','3322','3323','3332','3333'
-	    ];
+	      (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
+	    } else {
+	      if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
+	        var _okBuffer2;
 
-	  } else if (dim === 8) {
-	    quadKeys = [
-	      '000','001','010','011',  '100','101','110','111',
-	      '002','003','012','013',  '102','103','112','113',
-	      '020','021','030','031',  '120','121','130','131',
-	      '022','023','032','033',  '122','123','132','133',
-
-	      '200','201','210','211',  '300','301','310','311',
-	      '202','203','212','213',  '302','303','312','313',
-	      '220','221','230','231',  '320','321','330','331',
-	      '222','223','232','233',  '322','323','332','333'
-	    ];
+	        (_okBuffer2 = okBuffer).push.apply(_okBuffer2, _toConsumableArray(region.aContent));
+	      } else {
+	        flushOk();
+	        results.push({
+	          conflict: {
+	            a: region.aContent,
+	            aIndex: region.aStart,
+	            o: region.oContent,
+	            oIndex: region.oStart,
+	            b: region.bContent,
+	            bIndex: region.bStart
+	          }
+	        });
+	      }
+	    }
+	  });
+	  flushOk();
+	  return results;
+	}
 
-	  } else if (dim === 4) {
-	    quadKeys = [
-	      '00','01',  '10','11',
-	      '02','03',  '12','13',
+	function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
+	  discardTags = discardTags || {};
+	  var _option = 'safe'; // 'safe', 'force_local', 'force_remote'
 
-	      '20','21',  '30','31',
-	      '22','23',  '32','33'
-	    ];
+	  var _conflicts = [];
 
-	  } else {  // dim === 2
-	    quadKeys = [
-	      '0', '1',
-	      '2', '3'
-	    ];
+	  function user(d) {
+	    return typeof formatUser === 'function' ? formatUser(d) : d;
 	  }
 
-	  return quadKeys;
-	}
-
-
-
-	var serviceStreetside = {
-	  /**
-	   * init() initialize streetside.
-	   */
-	  init: function() {
-	    if (!_ssCache) {
-	      this.reset();
+	  function mergeLocation(remote, target) {
+	    function pointEqual(a, b) {
+	      var epsilon = 1e-6;
+	      return Math.abs(a[0] - b[0]) < epsilon && Math.abs(a[1] - b[1]) < epsilon;
 	    }
 
-	    this.event = utilRebind(this, dispatch$7, 'on');
-	  },
-
-	  /**
-	   * reset() reset the cache.
-	   */
-	  reset: function() {
-	    if (_ssCache) {
-	      Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$6);
+	    if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
+	      return target;
 	    }
 
-	    _ssCache = {
-	      bubbles: { inflight: {}, loaded: {}, nextPage: {}, rtree: new RBush(), points: {}, leaders: [] },
-	      sequences: {}
-	    };
-	  },
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        loc: remote.loc
+	      });
+	    }
 
-	  /**
-	   * bubbles()
-	   */
-	  bubbles: function(projection) {
-	    var limit = 5;
-	    return searchLimited$2(limit, projection, _ssCache.bubbles.rtree);
-	  },
+	    _conflicts.push(_t('merge_remote_changes.conflict.location', {
+	      user: user(remote.user)
+	    }));
 
+	    return target;
+	  }
 
-	  sequences: function(projection) {
-	    var viewport = projection.clipExtent();
-	    var min = [viewport[0][0], viewport[1][1]];
-	    var max = [viewport[1][0], viewport[0][1]];
-	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-	    var seen = {};
-	    var results = [];
+	  function mergeNodes(base, remote, target) {
+	    if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
+	      return target;
+	    }
 
-	    // all sequences for bubbles in viewport
-	    _ssCache.bubbles.rtree.search(bbox)
-	      .forEach(function (d) {
-	        var key = d.data.sequenceKey;
-	        if (key && !seen[key]) {
-	            seen[key] = true;
-	            results.push(_ssCache.sequences[key].geojson);
-	        }
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        nodes: remote.nodes
 	      });
+	    }
 
-	    return results;
-	  },
+	    var ccount = _conflicts.length;
+	    var o = base.nodes || [];
+	    var a = target.nodes || [];
+	    var b = remote.nodes || [];
+	    var nodes = [];
+	    var hunks = diff3Merge(a, o, b, {
+	      excludeFalseConflicts: true
+	    });
 
+	    for (var i = 0; i < hunks.length; i++) {
+	      var hunk = hunks[i];
 
-	  /**
-	   * loadBubbles()
-	   */
-	  loadBubbles: function(projection, margin) {
-	    // by default: request 2 nearby tiles so we can connect sequences.
-	    if (margin === undefined) { margin = 2; }
+	      if (hunk.ok) {
+	        nodes.push.apply(nodes, hunk.ok);
+	      } else {
+	        // for all conflicts, we can assume c.a !== c.b
+	        // because `diff3Merge` called with `true` option to exclude false conflicts..
+	        var c = hunk.conflict;
+
+	        if (fastDeepEqual(c.o, c.a)) {
+	          // only changed remotely
+	          nodes.push.apply(nodes, c.b);
+	        } else if (fastDeepEqual(c.o, c.b)) {
+	          // only changed locally
+	          nodes.push.apply(nodes, c.a);
+	        } else {
+	          // changed both locally and remotely
+	          _conflicts.push(_t('merge_remote_changes.conflict.nodelist', {
+	            user: user(remote.user)
+	          }));
 
-	    loadTiles$2('bubbles', bubbleApi, projection, margin);
-	  },
+	          break;
+	        }
+	      }
+	    }
 
+	    return _conflicts.length === ccount ? target.update({
+	      nodes: nodes
+	    }) : target;
+	  }
 
-	  viewer: function() {
-	    return _pannellumViewer;
-	  },
+	  function mergeChildren(targetWay, children, updates, graph) {
+	    function isUsed(node, targetWay) {
+	      var hasInterestingParent = graph.parentWays(node).some(function (way) {
+	        return way.id !== targetWay.id;
+	      });
+	      return node.hasInterestingTags() || hasInterestingParent || graph.parentRelations(node).length > 0;
+	    }
 
+	    var ccount = _conflicts.length;
 
-	  initViewer: function () {
-	    if (!window.pannellum) { return; }
-	    if (_pannellumViewer) { return; }
+	    for (var i = 0; i < children.length; i++) {
+	      var id = children[i];
+	      var node = graph.hasEntity(id); // remove unused childNodes..
 
-	    var sceneID = ++_currScene + '';
-	    var options = {
-	      'default': { firstScene: sceneID },
-	      scenes: {}
-	    };
-	    options.scenes[sceneID] = _sceneOptions;
+	      if (targetWay.nodes.indexOf(id) === -1) {
+	        if (node && !isUsed(node, targetWay)) {
+	          updates.removeIds.push(id);
+	        }
 
-	    _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
-	  },
+	        continue;
+	      } // restore used childNodes..
 
 
-	  /**
-	   * loadViewer() create the streeside viewer.
-	   */
-	  loadViewer: function(context) {
-	    var that = this;
+	      var local = localGraph.hasEntity(id);
+	      var remote = remoteGraph.hasEntity(id);
+	      var target;
 
-	    var pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	      if (_option === 'force_remote' && remote && remote.visible) {
+	        updates.replacements.push(remote);
+	      } else if (_option === 'force_local' && local) {
+	        target = osmEntity(local);
 
-	    // create ms-wrapper, a photo wrapper class
-	    var wrap = context.container().select('.photoviewer').selectAll('.ms-wrapper')
-	      .data([0]);
+	        if (remote) {
+	          target = target.update({
+	            version: remote.version
+	          });
+	        }
 
-	    // inject ms-wrapper into the photoviewer div
-	    // (used by all to house each custom photo viewer)
-	    var wrapEnter = wrap.enter()
-	      .append('div')
-	      .attr('class', 'photo-wrapper ms-wrapper')
-	      .classed('hide', true);
-
-	    // inject div to support streetside viewer (pannellum) and attribution line
-	    wrapEnter
-	      .append('div')
-	      .attr('id', 'ideditor-viewer-streetside')
-	      .on(pointerPrefix + 'down.streetside', function () {
-	        select(window)
-	          .on(pointerPrefix + 'move.streetside', function () {
-	            dispatch$7.call('viewerChanged');
-	          }, true);
-	      })
-	      .on(pointerPrefix + 'up.streetside pointercancel.streetside', function () {
-	        select(window)
-	          .on(pointerPrefix + 'move.streetside', null);
-
-	        // continue dispatching events for a few seconds, in case viewer has inertia.
-	        var t = timer(function (elapsed) {
-	          dispatch$7.call('viewerChanged');
-	          if (elapsed > 2000) {
-	            t.stop();
-	          }
+	        updates.replacements.push(target);
+	      } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
+	        target = osmEntity(local, {
+	          version: remote.version
 	        });
-	      })
-	      .append('div')
-	      .attr('class', 'photo-attribution fillD');
-
-	    var controlsEnter = wrapEnter
-	      .append('div')
-	      .attr('class', 'photo-controls-wrap')
-	      .append('div')
-	      .attr('class', 'photo-controls');
-
-	    controlsEnter
-	      .append('button')
-	      .on('click.back', step(-1))
-	      .text('◄');
-
-	    controlsEnter
-	      .append('button')
-	      .on('click.forward', step(1))
-	      .text('►');
-
-
-	    // create working canvas for stitching together images
-	    wrap = wrap
-	      .merge(wrapEnter)
-	      .call(setupCanvas, true);
-
-	    // load streetside pannellum viewer css
-	    select('head').selectAll('#ideditor-streetside-viewercss')
-	      .data([0])
-	      .enter()
-	      .append('link')
-	      .attr('id', 'ideditor-streetside-viewercss')
-	      .attr('rel', 'stylesheet')
-	      .attr('href', context.asset(pannellumViewerCSS));
-
-	    // load streetside pannellum viewer js
-	    select('head').selectAll('#ideditor-streetside-viewerjs')
-	      .data([0])
-	      .enter()
-	      .append('script')
-	      .attr('id', 'ideditor-streetside-viewerjs')
-	      .attr('src', context.asset(pannellumViewerJS));
-
-
-	    // Register viewer resize handler
-	    context.ui().photoviewer.on('resize.streetside', function () {
-	      if (_pannellumViewer) {
-	        _pannellumViewer.resize();
-	      }
-	    });
 
+	        if (remote.visible) {
+	          target = mergeLocation(remote, target);
+	        } else {
+	          _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
+	            user: user(remote.user)
+	          }));
+	        }
 
-	    function step(stepBy) {
-	      return function () {
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
-	        if (!selected) { return; }
-
-	        var nextID = (stepBy === 1 ? selected.ne : selected.pr);
-	        var yaw = _pannellumViewer.getYaw();
-	        var ca = selected.ca + yaw;
-	        var origin = selected.loc;
+	        if (_conflicts.length !== ccount) break;
+	        updates.replacements.push(target);
+	      }
+	    }
 
-	        // construct a search trapezoid pointing out from current bubble
-	        var meters = 35;
-	        var p1 = [
-	          origin[0] + geoMetersToLon(meters / 5, origin[1]),
-	          origin[1]
-	        ];
-	        var p2 = [
-	          origin[0] + geoMetersToLon(meters / 2, origin[1]),
-	          origin[1] + geoMetersToLat(meters)
-	        ];
-	        var p3 = [
-	          origin[0] - geoMetersToLon(meters / 2, origin[1]),
-	          origin[1] + geoMetersToLat(meters)
-	        ];
-	        var p4 = [
-	          origin[0] - geoMetersToLon(meters / 5, origin[1]),
-	          origin[1]
-	        ];
+	    return targetWay;
+	  }
 
-	        var poly = [p1, p2, p3, p4, p1];
+	  function updateChildren(updates, graph) {
+	    for (var i = 0; i < updates.replacements.length; i++) {
+	      graph = graph.replace(updates.replacements[i]);
+	    }
 
-	        // rotate it to face forward/backward
-	        var angle = (stepBy === 1 ? ca : ca + 180) * (Math.PI / 180);
-	        poly = geoRotate(poly, -angle, origin);
+	    if (updates.removeIds.length) {
+	      graph = actionDeleteMultiple(updates.removeIds)(graph);
+	    }
 
-	        var extent = poly.reduce(function (extent, point) {
-	          return extent.extend(geoExtent(point));
-	        }, geoExtent());
+	    return graph;
+	  }
 
-	        // find nearest other bubble in the search polygon
-	        var minDist = Infinity;
-	        _ssCache.bubbles.rtree.search(extent.bbox())
-	          .forEach(function (d) {
-	            if (d.data.key === selected.key) { return; }
-	            if (!geoPointInPolygon(d.data.loc, poly)) { return; }
-
-	            var dist = geoVecLength(d.data.loc, selected.loc);
-	            var theta = selected.ca - d.data.ca;
-	            var minTheta = Math.min(Math.abs(theta), 360 - Math.abs(theta));
-	            if (minTheta > 20) {
-	              dist += 5;  // penalize distance if camera angles don't match
-	            }
+	  function mergeMembers(remote, target) {
+	    if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
+	      return target;
+	    }
 
-	            if (dist < minDist) {
-	              nextID = d.data.key;
-	              minDist = dist;
-	            }
-	          });
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        members: remote.members
+	      });
+	    }
 
-	        var nextBubble = nextID && _ssCache.bubbles.points[nextID];
-	        if (!nextBubble) { return; }
+	    _conflicts.push(_t('merge_remote_changes.conflict.memberlist', {
+	      user: user(remote.user)
+	    }));
 
-	        context.map().centerEase(nextBubble.loc);
+	    return target;
+	  }
 
-	        that.selectImage(context, nextBubble)
-	          .then(function (response) {
-	            if (response.status === 'ok') {
-	              _sceneOptions.yaw = yaw;
-	              that.showViewer(context);
-	            }
-	          });
-	      };
+	  function mergeTags(base, remote, target) {
+	    if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
+	      return target;
 	    }
-	  },
 
-
-	  /**
-	   * showViewer()
-	   */
-	  showViewer: function(context, yaw) {
-	    if (!_sceneOptions) { return; }
-
-	    if (yaw !== undefined) {
-	      _sceneOptions.yaw = yaw;
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        tags: remote.tags
+	      });
 	    }
 
-	    if (!_pannellumViewer) {
-	      this.initViewer();
-	    } else {
-	      // make a new scene
-	      var sceneID = ++_currScene + '';
-	      _pannellumViewer
-	        .addScene(sceneID, _sceneOptions)
-	        .loadScene(sceneID);
+	    var ccount = _conflicts.length;
+	    var o = base.tags || {};
+	    var a = target.tags || {};
+	    var b = remote.tags || {};
+	    var keys = utilArrayUnion(utilArrayUnion(Object.keys(o), Object.keys(a)), Object.keys(b)).filter(function (k) {
+	      return !discardTags[k];
+	    });
+	    var tags = Object.assign({}, a); // shallow copy
+
+	    var changed = false;
+
+	    for (var i = 0; i < keys.length; i++) {
+	      var k = keys[i];
+
+	      if (o[k] !== b[k] && a[k] !== b[k]) {
+	        // changed remotely..
+	        if (o[k] !== a[k]) {
+	          // changed locally..
+	          _conflicts.push(_t('merge_remote_changes.conflict.tags', {
+	            tag: k,
+	            local: a[k],
+	            remote: b[k],
+	            user: user(remote.user)
+	          }));
+	        } else {
+	          // unchanged locally, accept remote change..
+	          if (b.hasOwnProperty(k)) {
+	            tags[k] = b[k];
+	          } else {
+	            delete tags[k];
+	          }
 
-	      // remove previous scene
-	      if (_currScene > 2) {
-	        sceneID = (_currScene - 1) + '';
-	        _pannellumViewer
-	          .removeScene(sceneID);
+	          changed = true;
+	        }
 	      }
 	    }
 
-	    var wrap = context.container().select('.photoviewer')
-	      .classed('hide', false);
+	    return changed && _conflicts.length === ccount ? target.update({
+	      tags: tags
+	    }) : target;
+	  } //  `graph.base()` is the common ancestor of the two graphs.
+	  //  `localGraph` contains user's edits up to saving
+	  //  `remoteGraph` contains remote edits to modified nodes
+	  //  `graph` must be a descendent of `localGraph` and may include
+	  //      some conflict resolution actions performed on it.
+	  //
+	  //                  --- ... --- `localGraph` -- ... -- `graph`
+	  //                 /
+	  //  `graph.base()` --- ... --- `remoteGraph`
+	  //
 
-	    var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
 
-	    if (isHidden) {
-	      wrap
-	        .selectAll('.photo-wrapper:not(.ms-wrapper)')
-	        .classed('hide', true);
+	  var action = function action(graph) {
+	    var updates = {
+	      replacements: [],
+	      removeIds: []
+	    };
+	    var base = graph.base().entities[id];
+	    var local = localGraph.entity(id);
+	    var remote = remoteGraph.entity(id);
+	    var target = osmEntity(local, {
+	      version: remote.version
+	    }); // delete/undelete
 
-	      wrap
-	        .selectAll('.photo-wrapper.ms-wrapper')
-	        .classed('hide', false);
-	    }
+	    if (!remote.visible) {
+	      if (_option === 'force_remote') {
+	        return actionDeleteMultiple([id])(graph);
+	      } else if (_option === 'force_local') {
+	        if (target.type === 'way') {
+	          target = mergeChildren(target, utilArrayUniq(local.nodes), updates, graph);
+	          graph = updateChildren(updates, graph);
+	        }
 
-	    return this;
-	  },
+	        return graph.replace(target);
+	      } else {
+	        _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
+	          user: user(remote.user)
+	        }));
 
+	        return graph; // do nothing
+	      }
+	    } // merge
 
-	  /**
-	   * hideViewer()
-	   */
-	  hideViewer: function (context) {
-	    var viewer = context.container().select('.photoviewer');
-	    if (!viewer.empty()) { viewer.datum(null); }
 
-	    viewer
-	      .classed('hide', true)
-	      .selectAll('.photo-wrapper')
-	      .classed('hide', true);
+	    if (target.type === 'node') {
+	      target = mergeLocation(remote, target);
+	    } else if (target.type === 'way') {
+	      // pull in any child nodes that may not be present locally..
+	      graph.rebase(remoteGraph.childNodes(remote), [graph], false);
+	      target = mergeNodes(base, remote, target);
+	      target = mergeChildren(target, utilArrayUnion(local.nodes, remote.nodes), updates, graph);
+	    } else if (target.type === 'relation') {
+	      target = mergeMembers(remote, target);
+	    }
 
-	    context.container().selectAll('.viewfield-group, .sequence, .icon-sign')
-	      .classed('currentView', false);
+	    target = mergeTags(base, remote, target);
 
-	    return this.setStyles(context, null, true);
-	  },
+	    if (!_conflicts.length) {
+	      graph = updateChildren(updates, graph).replace(target);
+	    }
 
+	    return graph;
+	  };
 
-	  /**
-	   * selectImage().
-	   */
-	  selectImage: function (context, d) {
-	    var that = this;
-	    var viewer = context.container().select('.photoviewer');
-	    if (!viewer.empty()) { viewer.datum(d); }
+	  action.withOption = function (opt) {
+	    _option = opt;
+	    return action;
+	  };
 
-	    this.setStyles(context, null, true);
+	  action.conflicts = function () {
+	    return _conflicts;
+	  };
 
-	    var wrap = context.container().select('.photoviewer .ms-wrapper');
-	    var attribution = wrap.selectAll('.photo-attribution').html('');
+	  return action;
+	}
 
-	    wrap.selectAll('.pnlm-load-box')   // display "loading.."
-	      .style('display', 'block');
+	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
 
-	    if (!d) {
-	      return Promise.resolve({ status: 'ok' });
-	    }
+	function actionMove(moveIDs, tryDelta, projection, cache) {
+	  var _delta = tryDelta;
 
-	    var line1 = attribution
-	      .append('div')
-	      .attr('class', 'attribution-row');
+	  function setupCache(graph) {
+	    function canMove(nodeID) {
+	      // Allow movement of any node that is in the selectedIDs list..
+	      if (moveIDs.indexOf(nodeID) !== -1) return true; // Allow movement of a vertex where 2 ways meet..
 
-	    var hiresDomId = utilUniqueDomId('streetside-hires');
+	      var parents = graph.parentWays(graph.entity(nodeID));
+	      if (parents.length < 3) return true; // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..
 
-	    // Add hires checkbox
-	    var label = line1
-	      .append('label')
-	      .attr('for', hiresDomId)
-	      .attr('class', 'streetside-hires');
+	      var parentsMoving = parents.every(function (way) {
+	        return cache.moving[way.id];
+	      });
+	      if (!parentsMoving) delete cache.moving[nodeID];
+	      return parentsMoving;
+	    }
 
-	    label
-	      .append('input')
-	      .attr('type', 'checkbox')
-	      .attr('id', hiresDomId)
-	      .property('checked', _hires)
-	      .on('click', function () {
-	        event.stopPropagation();
+	    function cacheEntities(ids) {
+	      for (var i = 0; i < ids.length; i++) {
+	        var id = ids[i];
+	        if (cache.moving[id]) continue;
+	        cache.moving[id] = true;
+	        var entity = graph.hasEntity(id);
+	        if (!entity) continue;
 
-	        _hires = !_hires;
-	        _resolution = _hires ? 1024 : 512;
-	        wrap.call(setupCanvas, true);
+	        if (entity.type === 'node') {
+	          cache.nodes.push(id);
+	          cache.startLoc[id] = entity.loc;
+	        } else if (entity.type === 'way') {
+	          cache.ways.push(id);
+	          cacheEntities(entity.nodes);
+	        } else {
+	          cacheEntities(entity.members.map(function (member) {
+	            return member.id;
+	          }));
+	        }
+	      }
+	    }
 
-	        var viewstate = {
-	          yaw: _pannellumViewer.getYaw(),
-	          pitch: _pannellumViewer.getPitch(),
-	          hfov: _pannellumViewer.getHfov()
-	        };
+	    function cacheIntersections(ids) {
+	      function isEndpoint(way, id) {
+	        return !way.isClosed() && !!way.affix(id);
+	      }
 
-	        that.selectImage(context, d)
-	          .then(function (response) {
-	            if (response.status === 'ok') {
-	              _sceneOptions = Object.assign(_sceneOptions, viewstate);
-	              that.showViewer(context);
-	            }
-	          });
-	      });
+	      for (var i = 0; i < ids.length; i++) {
+	        var id = ids[i]; // consider only intersections with 1 moved and 1 unmoved way.
 
-	    label
-	      .append('span')
-	      .text(_t('streetside.hires'));
+	        var childNodes = graph.childNodes(graph.entity(id));
 
+	        for (var j = 0; j < childNodes.length; j++) {
+	          var node = childNodes[j];
+	          var parents = graph.parentWays(node);
+	          if (parents.length !== 2) continue;
+	          var moved = graph.entity(id);
+	          var unmoved = null;
 
-	    var captureInfo = line1
-	      .append('div')
-	      .attr('class', 'attribution-capture-info');
+	          for (var k = 0; k < parents.length; k++) {
+	            var way = parents[k];
 
-	    // Add capture date
-	    if (d.captured_by) {
-	      var yyyy = (new Date()).getFullYear();
+	            if (!cache.moving[way.id]) {
+	              unmoved = way;
+	              break;
+	            }
+	          }
 
-	      captureInfo
-	        .append('a')
-	        .attr('class', 'captured_by')
-	        .attr('target', '_blank')
-	        .attr('href', 'https://www.microsoft.com/en-us/maps/streetside')
-	        .text('©' + yyyy + ' Microsoft');
+	          if (!unmoved) continue; // exclude ways that are overly connected..
 
-	      captureInfo
-	        .append('span')
-	        .text('|');
+	          if (utilArrayIntersection(moved.nodes, unmoved.nodes).length > 2) continue;
+	          if (moved.isArea() || unmoved.isArea()) continue;
+	          cache.intersections.push({
+	            nodeId: node.id,
+	            movedId: moved.id,
+	            unmovedId: unmoved.id,
+	            movedIsEP: isEndpoint(moved, node.id),
+	            unmovedIsEP: isEndpoint(unmoved, node.id)
+	          });
+	        }
+	      }
 	    }
 
-	    if (d.captured_at) {
-	      captureInfo
-	        .append('span')
-	        .attr('class', 'captured_at')
-	        .text(localeTimestamp(d.captured_at));
+	    if (!cache) {
+	      cache = {};
 	    }
 
-	    // Add image links
-	    var line2 = attribution
-	      .append('div')
-	      .attr('class', 'attribution-row');
-
-	    line2
-	      .append('a')
-	      .attr('class', 'image-view-link')
-	      .attr('target', '_blank')
-	      .attr('href', 'https://www.bing.com/maps?cp=' + d.loc[1] + '~' + d.loc[0] +
-	        '&lvl=17&dir=' + d.ca + '&style=x&v=2&sV=1')
-	      .text(_t('streetside.view_on_bing'));
+	    if (!cache.ok) {
+	      cache.moving = {};
+	      cache.intersections = [];
+	      cache.replacedVertex = {};
+	      cache.startLoc = {};
+	      cache.nodes = [];
+	      cache.ways = [];
+	      cacheEntities(moveIDs);
+	      cacheIntersections(cache.ways);
+	      cache.nodes = cache.nodes.filter(canMove);
+	      cache.ok = true;
+	    }
+	  } // Place a vertex where the moved vertex used to be, to preserve way shape..
+	  //
+	  //  Start:
+	  //      b ---- e
+	  //     / \
+	  //    /   \
+	  //   /     \
+	  //  a       c
+	  //
+	  //      *               node '*' added to preserve shape
+	  //     / \
+	  //    /   b ---- e      way `b,e` moved here:
+	  //   /     \
+	  //  a       c
+	  //
+	  //
 
-	    line2
-	      .append('a')
-	      .attr('class', 'image-report-link')
-	      .attr('target', '_blank')
-	      .attr('href', 'https://www.bing.com/maps/privacyreport/streetsideprivacyreport?bubbleid=' +
-	        encodeURIComponent(d.key) + '&focus=photo&lat=' + d.loc[1] + '&lng=' + d.loc[0] + '&z=17')
-	      .text(_t('streetside.report'));
 
+	  function replaceMovedVertex(nodeId, wayId, graph, delta) {
+	    var way = graph.entity(wayId);
+	    var moved = graph.entity(nodeId);
+	    var movedIndex = way.nodes.indexOf(nodeId);
+	    var len, prevIndex, nextIndex;
 
-	    var bubbleIdQuadKey = d.key.toString(4);
-	    var paddingNeeded = 16 - bubbleIdQuadKey.length;
-	    for (var i = 0; i < paddingNeeded; i++) {
-	      bubbleIdQuadKey = '0' + bubbleIdQuadKey;
+	    if (way.isClosed()) {
+	      len = way.nodes.length - 1;
+	      prevIndex = (movedIndex + len - 1) % len;
+	      nextIndex = (movedIndex + len + 1) % len;
+	    } else {
+	      len = way.nodes.length;
+	      prevIndex = movedIndex - 1;
+	      nextIndex = movedIndex + 1;
 	    }
-	    var imgUrlPrefix = streetsideImagesApi + 'hs' + bubbleIdQuadKey;
-	    var imgUrlSuffix = '.jpg?g=6338&n=z';
 
-	    // Cubemap face code order matters here: front=01, right=02, back=03, left=10, up=11, down=12
-	    var faceKeys = ['01','02','03','10','11','12'];
-
-	    // Map images to cube faces
-	    var quadKeys = getQuadKeys();
-	    var faces = faceKeys.map(function (faceKey) {
-	      return quadKeys.map(function (quadKey) {
-	        var xy = qkToXY(quadKey);
-	        return {
-	          face: faceKey,
-	          url: imgUrlPrefix + faceKey + quadKey + imgUrlSuffix,
-	          x: xy[0],
-	          y: xy[1]
-	        };
-	      });
-	    });
+	    var prev = graph.hasEntity(way.nodes[prevIndex]);
+	    var next = graph.hasEntity(way.nodes[nextIndex]); // Don't add orig vertex at endpoint..
 
-	    return loadFaces(faces)
-	      .then(function () {
-	        _sceneOptions = {
-	          showFullscreenCtrl: false,
-	          autoLoad: true,
-	          compass: true,
-	          northOffset: d.ca,
-	          yaw: 0,
-	          minHfov: minHfov,
-	          maxHfov: maxHfov,
-	          hfov: defaultHfov,
-	          type: 'cubemap',
-	          cubeMap: [
-	            _dataUrlArray[0],
-	            _dataUrlArray[1],
-	            _dataUrlArray[2],
-	            _dataUrlArray[3],
-	            _dataUrlArray[4],
-	            _dataUrlArray[5]
-	          ]
-	        };
-	        return { status: 'ok' };
-	      });
-	  },
+	    if (!prev || !next) return graph;
+	    var key = wayId + '_' + nodeId;
+	    var orig = cache.replacedVertex[key];
 
+	    if (!orig) {
+	      orig = osmNode();
+	      cache.replacedVertex[key] = orig;
+	      cache.startLoc[orig.id] = cache.startLoc[nodeId];
+	    }
 
-	  getSequenceKeyForBubble: function(d) {
-	    return d && d.sequenceKey;
-	  },
+	    var start, end;
 
+	    if (delta) {
+	      start = projection(cache.startLoc[nodeId]);
+	      end = projection.invert(geoVecAdd(start, delta));
+	    } else {
+	      end = cache.startLoc[nodeId];
+	    }
 
-	  // Updates the currently highlighted sequence and selected bubble.
-	  // Reset is only necessary when interacting with the viewport because
-	  // this implicitly changes the currently selected bubble/sequence
-	  setStyles: function (context, hovered, reset) {
-	    if (reset) {  // reset all layers
-	      context.container().selectAll('.viewfield-group')
-	        .classed('highlighted', false)
-	        .classed('hovered', false)
-	        .classed('currentView', false);
+	    orig = orig.move(end);
+	    var angle = Math.abs(geoAngle(orig, prev, projection) - geoAngle(orig, next, projection)) * 180 / Math.PI; // Don't add orig vertex if it would just make a straight line..
 
-	      context.container().selectAll('.sequence')
-	        .classed('highlighted', false)
-	        .classed('currentView', false);
-	    }
+	    if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?
 
-	    var hoveredBubbleKey = hovered && hovered.key;
-	    var hoveredSequenceKey = this.getSequenceKeyForBubble(hovered);
-	    var hoveredSequence = hoveredSequenceKey && _ssCache.sequences[hoveredSequenceKey];
-	    var hoveredBubbleKeys =  (hoveredSequence && hoveredSequence.bubbles.map(function (d) { return d.key; })) || [];
+	    var p1 = [prev.loc, orig.loc, moved.loc, next.loc].map(projection);
+	    var p2 = [prev.loc, moved.loc, orig.loc, next.loc].map(projection);
+	    var d1 = geoPathLength(p1);
+	    var d2 = geoPathLength(p2);
+	    var insertAt = d1 <= d2 ? movedIndex : nextIndex; // moving around closed loop?
 
-	    var viewer = context.container().select('.photoviewer');
-	    var selected = viewer.empty() ? undefined : viewer.datum();
-	    var selectedBubbleKey = selected && selected.key;
-	    var selectedSequenceKey = this.getSequenceKeyForBubble(selected);
-	    var selectedSequence = selectedSequenceKey && _ssCache.sequences[selectedSequenceKey];
-	    var selectedBubbleKeys = (selectedSequence && selectedSequence.bubbles.map(function (d) { return d.key; })) || [];
+	    if (way.isClosed() && insertAt === 0) insertAt = len;
+	    way = way.addNode(orig.id, insertAt);
+	    return graph.replace(orig).replace(way);
+	  } // Remove duplicate vertex that might have been added by
+	  // replaceMovedVertex.  This is done after the unzorro checks.
 
-	    // highlight sibling viewfields on either the selected or the hovered sequences
-	    var highlightedBubbleKeys = utilArrayUnion(hoveredBubbleKeys, selectedBubbleKeys);
 
-	    context.container().selectAll('.layer-streetside-images .viewfield-group')
-	      .classed('highlighted', function (d) { return highlightedBubbleKeys.indexOf(d.key) !== -1; })
-	      .classed('hovered',     function (d) { return d.key === hoveredBubbleKey; })
-	      .classed('currentView', function (d) { return d.key === selectedBubbleKey; });
+	  function removeDuplicateVertices(wayId, graph) {
+	    var way = graph.entity(wayId);
+	    var epsilon = 1e-6;
+	    var prev, curr;
 
-	    context.container().selectAll('.layer-streetside-images .sequence')
-	      .classed('highlighted', function (d) { return d.properties.key === hoveredSequenceKey; })
-	      .classed('currentView', function (d) { return d.properties.key === selectedSequenceKey; });
+	    function isInteresting(node, graph) {
+	      return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+	    }
 
-	    // update viewfields if needed
-	    context.container().selectAll('.viewfield-group .viewfield')
-	      .attr('d', viewfieldPath);
+	    for (var i = 0; i < way.nodes.length; i++) {
+	      curr = graph.entity(way.nodes[i]);
 
-	    function viewfieldPath() {
-	      var d = this.parentNode.__data__;
-	      if (d.pano && d.key !== selectedBubbleKey) {
-	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	      } else {
-	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      if (prev && curr && geoVecEqual(prev.loc, curr.loc, epsilon)) {
+	        if (!isInteresting(prev, graph)) {
+	          way = way.removeNode(prev.id);
+	          graph = graph.replace(way).remove(prev);
+	        } else if (!isInteresting(curr, graph)) {
+	          way = way.removeNode(curr.id);
+	          graph = graph.replace(way).remove(curr);
+	        }
 	      }
-	    }
 
-	    return this;
-	  },
+	      prev = curr;
+	    }
 
+	    return graph;
+	  } // Reorder nodes around intersections that have moved..
+	  //
+	  //  Start:                way1.nodes: b,e         (moving)
+	  //  a - b - c ----- d     way2.nodes: a,b,c,d     (static)
+	  //      |                 vertex: b
+	  //      e                 isEP1: true,  isEP2, false
+	  //
+	  //  way1 `b,e` moved here:
+	  //  a ----- c = b - d
+	  //              |
+	  //              e
+	  //
+	  //  reorder nodes         way1.nodes: b,e
+	  //  a ----- c - b - d     way2.nodes: a,c,b,d
+	  //              |
+	  //              e
+	  //
 
-	  /**
-	   * cache().
-	   */
-	  cache: function () {
-	    return _ssCache;
-	  }
-	};
 
-	var apibase$4 = 'https://taginfo.openstreetmap.org/api/4/';
-	var _inflight$2 = {};
-	var _popularKeys = {};
-	var _taginfoCache = {};
+	  function unZorroIntersection(intersection, graph) {
+	    var vertex = graph.entity(intersection.nodeId);
+	    var way1 = graph.entity(intersection.movedId);
+	    var way2 = graph.entity(intersection.unmovedId);
+	    var isEP1 = intersection.movedIsEP;
+	    var isEP2 = intersection.unmovedIsEP; // don't move the vertex if it is the endpoint of both ways.
 
-	var tag_sorts = {
-	    point: 'count_nodes',
-	    vertex: 'count_nodes',
-	    area: 'count_ways',
-	    line: 'count_ways'
-	};
-	var tag_sort_members = {
-	    point: 'count_node_members',
-	    vertex: 'count_node_members',
-	    area: 'count_way_members',
-	    line: 'count_way_members',
-	    relation: 'count_relation_members'
-	};
-	var tag_filters = {
-	    point: 'nodes',
-	    vertex: 'nodes',
-	    area: 'ways',
-	    line: 'ways'
-	};
-	var tag_members_fractions = {
-	    point: 'count_node_members_fraction',
-	    vertex: 'count_node_members_fraction',
-	    area: 'count_way_members_fraction',
-	    line: 'count_way_members_fraction',
-	    relation: 'count_relation_members_fraction'
-	};
+	    if (isEP1 && isEP2) return graph;
+	    var nodes1 = graph.childNodes(way1).filter(function (n) {
+	      return n !== vertex;
+	    });
+	    var nodes2 = graph.childNodes(way2).filter(function (n) {
+	      return n !== vertex;
+	    });
+	    if (way1.isClosed() && way1.first() === vertex.id) nodes1.push(nodes1[0]);
+	    if (way2.isClosed() && way2.first() === vertex.id) nodes2.push(nodes2[0]);
+	    var edge1 = !isEP1 && geoChooseEdge(nodes1, projection(vertex.loc), projection);
+	    var edge2 = !isEP2 && geoChooseEdge(nodes2, projection(vertex.loc), projection);
+	    var loc; // snap vertex to nearest edge (or some point between them)..
+
+	    if (!isEP1 && !isEP2) {
+	      var epsilon = 1e-6,
+	          maxIter = 10;
+
+	      for (var i = 0; i < maxIter; i++) {
+	        loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
+	        edge1 = geoChooseEdge(nodes1, projection(loc), projection);
+	        edge2 = geoChooseEdge(nodes2, projection(loc), projection);
+	        if (Math.abs(edge1.distance - edge2.distance) < epsilon) break;
+	      }
+	    } else if (!isEP1) {
+	      loc = edge1.loc;
+	    } else {
+	      loc = edge2.loc;
+	    }
 
+	    graph = graph.replace(vertex.move(loc)); // if zorro happened, reorder nodes..
 
-	function sets(params, n, o) {
-	    if (params.geometry && o[params.geometry]) {
-	        params[n] = o[params.geometry];
+	    if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
+	      way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
+	      graph = graph.replace(way1);
 	    }
-	    return params;
-	}
 
+	    if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
+	      way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
+	      graph = graph.replace(way2);
+	    }
 
-	function setFilter(params) {
-	    return sets(params, 'filter', tag_filters);
-	}
+	    return graph;
+	  }
 
+	  function cleanupIntersections(graph) {
+	    for (var i = 0; i < cache.intersections.length; i++) {
+	      var obj = cache.intersections[i];
+	      graph = replaceMovedVertex(obj.nodeId, obj.movedId, graph, _delta);
+	      graph = replaceMovedVertex(obj.nodeId, obj.unmovedId, graph, null);
+	      graph = unZorroIntersection(obj, graph);
+	      graph = removeDuplicateVertices(obj.movedId, graph);
+	      graph = removeDuplicateVertices(obj.unmovedId, graph);
+	    }
 
-	function setSort(params) {
-	    return sets(params, 'sortname', tag_sorts);
-	}
+	    return graph;
+	  } // check if moving way endpoint can cross an unmoved way, if so limit delta..
 
 
-	function setSortMembers(params) {
-	    return sets(params, 'sortname', tag_sort_members);
-	}
+	  function limitDelta(graph) {
+	    function moveNode(loc) {
+	      return geoVecAdd(projection(loc), _delta);
+	    }
 
+	    for (var i = 0; i < cache.intersections.length; i++) {
+	      var obj = cache.intersections[i]; // Don't limit movement if this is vertex joins 2 endpoints..
 
-	function clean(params) {
-	    return utilObjectOmit(params, ['geometry', 'debounce']);
-	}
+	      if (obj.movedIsEP && obj.unmovedIsEP) continue; // Don't limit movement if this vertex is not an endpoint anyway..
 
+	      if (!obj.movedIsEP) continue;
+	      var node = graph.entity(obj.nodeId);
+	      var start = projection(node.loc);
+	      var end = geoVecAdd(start, _delta);
+	      var movedNodes = graph.childNodes(graph.entity(obj.movedId));
+	      var movedPath = movedNodes.map(function (n) {
+	        return moveNode(n.loc);
+	      });
+	      var unmovedNodes = graph.childNodes(graph.entity(obj.unmovedId));
+	      var unmovedPath = unmovedNodes.map(function (n) {
+	        return projection(n.loc);
+	      });
+	      var hits = geoPathIntersections(movedPath, unmovedPath);
 
-	function filterKeys(type) {
-	    var count_type = type ? 'count_' + type : 'count_all';
-	    return function(d) {
-	        return parseFloat(d[count_type]) > 2500 || d.in_wiki;
-	    };
-	}
+	      for (var j = 0; i < hits.length; i++) {
+	        if (geoVecEqual(hits[j], end)) continue;
+	        var edge = geoChooseEdge(unmovedNodes, end, projection);
+	        _delta = geoVecSubtract(projection(edge.loc), start);
+	      }
+	    }
+	  }
 
+	  var action = function action(graph) {
+	    if (_delta[0] === 0 && _delta[1] === 0) return graph;
+	    setupCache(graph);
 
-	function filterMultikeys(prefix) {
-	    return function(d) {
-	        // d.key begins with prefix, and d.key contains no additional ':'s
-	        var re = new RegExp('^' + prefix + '(.*)$');
-	        var matches = d.key.match(re) || [];
-	        return (matches.length === 2 && matches[1].indexOf(':') === -1);
-	    };
-	}
+	    if (cache.intersections.length) {
+	      limitDelta(graph);
+	    }
 
+	    for (var i = 0; i < cache.nodes.length; i++) {
+	      var node = graph.entity(cache.nodes[i]);
+	      var start = projection(node.loc);
+	      var end = geoVecAdd(start, _delta);
+	      graph = graph.replace(node.move(projection.invert(end)));
+	    }
 
-	function filterValues(allowUpperCase) {
-	    return function(d) {
-	        if (d.value.match(/[;,]/) !== null) { return false; }  // exclude some punctuation
-	        if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) { return false; }  // exclude uppercase letters
-	        return parseFloat(d.fraction) > 0.0;
-	    };
-	}
+	    if (cache.intersections.length) {
+	      graph = cleanupIntersections(graph);
+	    }
 
+	    return graph;
+	  };
 
-	function filterRoles(geometry) {
-	    return function(d) {
-	        if (d.role === '') { return false; } // exclude empty role
-	        if (d.role.match(/[A-Z*;,]/) !== null) { return false; }  // exclude uppercase letters and some punctuation
-	        return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
-	    };
-	}
+	  action.delta = function () {
+	    return _delta;
+	  };
 
+	  return action;
+	}
 
-	function valKey(d) {
-	    return {
-	        value: d.key,
-	        title: d.key
-	    };
+	function actionMoveMember(relationId, fromIndex, toIndex) {
+	  return function (graph) {
+	    return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
+	  };
 	}
 
+	function actionMoveNode(nodeID, toLoc) {
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var node = graph.entity(nodeID);
+	    return graph.replace(node.move(geoVecInterp(node.loc, toLoc, t)));
+	  };
 
-	function valKeyDescription(d) {
-	    var obj = {
-	        value: d.value,
-	        title: d.description || d.value
-	    };
-	    if (d.count) {
-	        obj.count = d.count;
-	    }
-	    return obj;
+	  action.transitionable = true;
+	  return action;
 	}
 
-
-	function roleKey(d) {
-	    return {
-	        value: d.role,
-	        title: d.role
-	    };
+	function actionNoop() {
+	  return function (graph) {
+	    return graph;
+	  };
 	}
 
+	function actionOrthogonalize(wayID, projection, vertexID, degThresh, ep) {
+	  var epsilon = ep || 1e-4;
+	  var threshold = degThresh || 13; // degrees within right or straight to alter
+	  // We test normalized dot products so we can compare as cos(angle)
 
-	// sort keys with ':' lower than keys without ':'
-	function sortKeys(a, b) {
-	    return (a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1) ? -1
-	        : (a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1) ? 1
-	        : 0;
-	}
+	  var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+	  var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var way = graph.entity(wayID);
+	    way = way.removeNode(''); // sanity check - remove any consecutive duplicates
 
-	var debouncedRequest$1 = debounce(request$1, 300, { leading: false });
+	    if (way.tags.nonsquare) {
+	      var tags = Object.assign({}, way.tags); // since we're squaring, remove indication that this is physically unsquare
 
-	function request$1(url, params, exactMatch, callback, loaded) {
-	    if (_inflight$2[url]) { return; }
+	      delete tags.nonsquare;
+	      way = way.update({
+	        tags: tags
+	      });
+	    }
 
-	    if (checkCache(url, params, exactMatch, callback)) { return; }
+	    graph = graph.replace(way);
+	    var isClosed = way.isClosed();
+	    var nodes = graph.childNodes(way).slice(); // shallow copy
 
-	    var controller = new AbortController();
-	    _inflight$2[url] = controller;
+	    if (isClosed) nodes.pop();
 
-	    d3_json(url, { signal: controller.signal })
-	        .then(function(result) {
-	            delete _inflight$2[url];
-	            if (loaded) { loaded(null, result); }
-	        })
-	        .catch(function(err) {
-	            delete _inflight$2[url];
-	            if (err.name === 'AbortError') { return; }
-	            if (loaded) { loaded(err.message); }
-	        });
-	}
+	    if (vertexID !== undefined) {
+	      nodes = nodeSubset(nodes, vertexID, isClosed);
+	      if (nodes.length !== 3) return graph;
+	    } // note: all geometry functions here use the unclosed node/point/coord list
 
 
-	function checkCache(url, params, exactMatch, callback) {
-	    var rp = params.rp || 25;
-	    var testQuery = params.query || '';
-	    var testUrl = url;
+	    var nodeCount = {};
+	    var points = [];
+	    var corner = {
+	      i: 0,
+	      dotp: 1
+	    };
+	    var node, point, loc, score, motions, i, j;
+
+	    for (i = 0; i < nodes.length; i++) {
+	      node = nodes[i];
+	      nodeCount[node.id] = (nodeCount[node.id] || 0) + 1;
+	      points.push({
+	        id: node.id,
+	        coord: projection(node.loc)
+	      });
+	    }
 
-	    do {
-	        var hit = _taginfoCache[testUrl];
+	    if (points.length === 3) {
+	      // move only one vertex for right triangle
+	      for (i = 0; i < 1000; i++) {
+	        motions = points.map(calcMotion);
+	        points[corner.i].coord = geoVecAdd(points[corner.i].coord, motions[corner.i]);
+	        score = corner.dotp;
 
-	        // exact match, or shorter match yielding fewer than max results (rp)
-	        if (hit && (url === testUrl || hit.length < rp)) {
-	            callback(null, hit);
-	            return true;
+	        if (score < epsilon) {
+	          break;
 	        }
+	      }
 
-	        // don't try to shorten the query
-	        if (exactMatch || !testQuery.length) { return false; }
+	      node = graph.entity(nodes[corner.i].id);
+	      loc = projection.invert(points[corner.i].coord);
+	      graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	    } else {
+	      var straights = [];
+	      var simplified = []; // Remove points from nearly straight sections..
+	      // This produces a simplified shape to orthogonalize
 
-	        // do shorten the query to see if we already have a cached result
-	        // that has returned fewer than max results (rp)
-	        testQuery = testQuery.slice(0, -1);
-	        testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
-	    } while (testQuery.length >= 0);
+	      for (i = 0; i < points.length; i++) {
+	        point = points[i];
+	        var dotp = 0;
 
-	    return false;
-	}
+	        if (isClosed || i > 0 && i < points.length - 1) {
+	          var a = points[(i - 1 + points.length) % points.length];
+	          var b = points[(i + 1) % points.length];
+	          dotp = Math.abs(geoOrthoNormalizedDotProduct(a.coord, b.coord, point.coord));
+	        }
 
+	        if (dotp > upperThreshold) {
+	          straights.push(point);
+	        } else {
+	          simplified.push(point);
+	        }
+	      } // Orthogonalize the simplified shape
 
-	var serviceTaginfo = {
 
-	    init: function() {
-	        _inflight$2 = {};
-	        _taginfoCache = {};
-	        _popularKeys = {
-	            // manually exclude some keys – #5377, #7485
-	            postal_code: true,
-	            full_name: true,
-	            loc_name: true,
-	            reg_name: true,
-	            short_name: true,
-	            sorting_name: true,
-	            artist_name: true,
-	            nat_name: true,
-	            long_name: true,
-	            'bridge:name': true
-	        };
+	      var bestPoints = clonePoints(simplified);
+	      var originalPoints = clonePoints(simplified);
+	      score = Infinity;
 
-	        // Fetch popular keys.  We'll exclude these from `values`
-	        // lookups because they stress taginfo, and they aren't likely
-	        // to yield meaningful autocomplete results.. see #3955
-	        var params = {
-	            rp: 100,
-	            sortname: 'values_all',
-	            sortorder: 'desc',
-	            page: 1,
-	            debounce: false,
-	            lang: _mainLocalizer.languageCode()
-	        };
-	        this.keys(params, function(err, data) {
-	            if (err) { return; }
-	            data.forEach(function(d) {
-	                if (d.value === 'opening_hours') { return; }  // exception
-	                _popularKeys[d.value] = true;
-	            });
-	        });
-	    },
+	      for (i = 0; i < 1000; i++) {
+	        motions = simplified.map(calcMotion);
 
+	        for (j = 0; j < motions.length; j++) {
+	          simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
+	        }
 
-	    reset: function() {
-	        Object.values(_inflight$2).forEach(function(controller) { controller.abort(); });
-	        _inflight$2 = {};
-	    },
+	        var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
 
+	        if (newScore < score) {
+	          bestPoints = clonePoints(simplified);
+	          score = newScore;
+	        }
 
-	    keys: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(params));
-	        params = Object.assign({
-	            rp: 10,
-	            sortname: 'count_all',
-	            sortorder: 'desc',
-	            page: 1,
-	            lang: _mainLocalizer.languageCode()
-	        }, params);
+	        if (score < epsilon) {
+	          break;
+	        }
+	      }
 
-	        var url = apibase$4 + 'keys/all?' + utilQsString(params);
-	        doRequest(url, params, false, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                var f = filterKeys(params.filter);
-	                var result = d.data.filter(f).sort(sortKeys).map(valKey);
-	                _taginfoCache[url] = result;
-	                callback(null, result);
-	            }
-	        });
-	    },
+	      var bestCoords = bestPoints.map(function (p) {
+	        return p.coord;
+	      });
+	      if (isClosed) bestCoords.push(bestCoords[0]); // move the nodes that should move
 
+	      for (i = 0; i < bestPoints.length; i++) {
+	        point = bestPoints[i];
 
-	    multikeys: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(params));
-	        params = Object.assign({
-	            rp: 25,
-	            sortname: 'count_all',
-	            sortorder: 'desc',
-	            page: 1,
-	            lang: _mainLocalizer.languageCode()
-	        }, params);
-
-	        var prefix = params.query;
-	        var url = apibase$4 + 'keys/all?' + utilQsString(params);
-	        doRequest(url, params, true, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                var f = filterMultikeys(prefix);
-	                var result = d.data.filter(f).map(valKey);
-	                _taginfoCache[url] = result;
-	                callback(null, result);
-	            }
-	        });
-	    },
+	        if (!geoVecEqual(originalPoints[i].coord, point.coord)) {
+	          node = graph.entity(point.id);
+	          loc = projection.invert(point.coord);
+	          graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	        }
+	      } // move the nodes along straight segments
 
 
-	    values: function(params, callback) {
-	        // Exclude popular keys from values lookups.. see #3955
-	        var key = params.key;
-	        if (key && _popularKeys[key]) {
-	            callback(null, []);
-	            return;
-	        }
+	      for (i = 0; i < straights.length; i++) {
+	        point = straights[i];
+	        if (nodeCount[point.id] > 1) continue; // skip self-intersections
 
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(setFilter(params)));
-	        params = Object.assign({
-	            rp: 25,
-	            sortname: 'count_all',
-	            sortorder: 'desc',
-	            page: 1,
-	            lang: _mainLocalizer.languageCode()
-	        }, params);
+	        node = graph.entity(point.id);
 
-	        var url = apibase$4 + 'key/values?' + utilQsString(params);
-	        doRequest(url, params, false, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                // In most cases we prefer taginfo value results with lowercase letters.
-	                // A few OSM keys expect values to contain uppercase values (see #3377).
-	                // This is not an exhaustive list (e.g. `name` also has uppercase values)
-	                // but these are the fields where taginfo value lookup is most useful.
-	                var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery/;
-	                var allowUpperCase = re.test(params.key);
-	                var f = filterValues(allowUpperCase);
-
-	                var result = d.data.filter(f).map(valKeyDescription);
-	                _taginfoCache[url] = result;
-	                callback(null, result);
-	            }
-	        });
-	    },
+	        if (t === 1 && graph.parentWays(node).length === 1 && graph.parentRelations(node).length === 0 && !node.hasInterestingTags()) {
+	          // remove uninteresting points..
+	          graph = actionDeleteNode(node.id)(graph);
+	        } else {
+	          // move interesting points to the nearest edge..
+	          var choice = geoVecProject(point.coord, bestCoords);
 
+	          if (choice) {
+	            loc = projection.invert(choice.target);
+	            graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	          }
+	        }
+	      }
+	    }
 
-	    roles: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        var geometry = params.geometry;
-	        params = clean(setSortMembers(params));
-	        params = Object.assign({
-	            rp: 25,
-	            sortname: 'count_all_members',
-	            sortorder: 'desc',
-	            page: 1,
-	            lang: _mainLocalizer.languageCode()
-	        }, params);
-
-	        var url = apibase$4 + 'relation/roles?' + utilQsString(params);
-	        doRequest(url, params, true, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                var f = filterRoles(geometry);
-	                var result = d.data.filter(f).map(roleKey);
-	                _taginfoCache[url] = result;
-	                callback(null, result);
-	            }
-	        });
-	    },
+	    return graph;
 
+	    function clonePoints(array) {
+	      return array.map(function (p) {
+	        return {
+	          id: p.id,
+	          coord: [p.coord[0], p.coord[1]]
+	        };
+	      });
+	    }
 
-	    docs: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(params));
+	    function calcMotion(point, i, array) {
+	      // don't try to move the endpoints of a non-closed way.
+	      if (!isClosed && (i === 0 || i === array.length - 1)) return [0, 0]; // don't try to move a node that appears more than once (self intersection)
+
+	      if (nodeCount[array[i].id] > 1) return [0, 0];
+	      var a = array[(i - 1 + array.length) % array.length].coord;
+	      var origin = point.coord;
+	      var b = array[(i + 1) % array.length].coord;
+	      var p = geoVecSubtract(a, origin);
+	      var q = geoVecSubtract(b, origin);
+	      var scale = 2 * Math.min(geoVecLength(p), geoVecLength(q));
+	      p = geoVecNormalize(p);
+	      q = geoVecNormalize(q);
+	      var dotp = p[0] * q[0] + p[1] * q[1];
+	      var val = Math.abs(dotp);
+
+	      if (val < lowerThreshold) {
+	        // nearly orthogonal
+	        corner.i = i;
+	        corner.dotp = val;
+	        var vec = geoVecNormalize(geoVecAdd(p, q));
+	        return geoVecScale(vec, 0.1 * dotp * scale);
+	      }
 
-	        var path = 'key/wiki_pages?';
-	        if (params.value) {
-	            path = 'tag/wiki_pages?';
-	        } else if (params.rtype) {
-	            path = 'relation/wiki_pages?';
-	        }
+	      return [0, 0]; // do nothing
+	    }
+	  }; // if we are only orthogonalizing one vertex,
+	  // get that vertex and the previous and next
 
-	        var url = apibase$4 + path + utilQsString(params);
-	        doRequest(url, params, true, callback, function(err, d) {
-	            if (err) {
-	                callback(err);
-	            } else {
-	                _taginfoCache[url] = d.data;
-	                callback(null, d.data);
-	            }
-	        });
-	    },
 
+	  function nodeSubset(nodes, vertexID, isClosed) {
+	    var first = isClosed ? 0 : 1;
+	    var last = isClosed ? nodes.length : nodes.length - 1;
 
-	    apibase: function(_) {
-	        if (!arguments.length) { return apibase$4; }
-	        apibase$4 = _;
-	        return this;
+	    for (var i = first; i < last; i++) {
+	      if (nodes[i].id === vertexID) {
+	        return [nodes[(i - 1 + nodes.length) % nodes.length], nodes[i], nodes[(i + 1) % nodes.length]];
+	      }
 	    }
 
-	};
+	    return [];
+	  }
 
-	var helpers$1 = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
-	/**
-	 * @module helpers
-	 */
-	/**
-	 * Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.
-	 *
-	 * @memberof helpers
-	 * @type {number}
-	 */
-	exports.earthRadius = 6371008.8;
-	/**
-	 * Unit of measurement factors using a spherical (non-ellipsoid) earth radius.
-	 *
-	 * @memberof helpers
-	 * @type {Object}
-	 */
-	exports.factors = {
-	    centimeters: exports.earthRadius * 100,
-	    centimetres: exports.earthRadius * 100,
-	    degrees: exports.earthRadius / 111325,
-	    feet: exports.earthRadius * 3.28084,
-	    inches: exports.earthRadius * 39.370,
-	    kilometers: exports.earthRadius / 1000,
-	    kilometres: exports.earthRadius / 1000,
-	    meters: exports.earthRadius,
-	    metres: exports.earthRadius,
-	    miles: exports.earthRadius / 1609.344,
-	    millimeters: exports.earthRadius * 1000,
-	    millimetres: exports.earthRadius * 1000,
-	    nauticalmiles: exports.earthRadius / 1852,
-	    radians: 1,
-	    yards: exports.earthRadius / 1.0936,
-	};
-	/**
-	 * Units of measurement factors based on 1 meter.
-	 *
-	 * @memberof helpers
-	 * @type {Object}
-	 */
-	exports.unitsFactors = {
-	    centimeters: 100,
-	    centimetres: 100,
-	    degrees: 1 / 111325,
-	    feet: 3.28084,
-	    inches: 39.370,
-	    kilometers: 1 / 1000,
-	    kilometres: 1 / 1000,
-	    meters: 1,
-	    metres: 1,
-	    miles: 1 / 1609.344,
-	    millimeters: 1000,
-	    millimetres: 1000,
-	    nauticalmiles: 1 / 1852,
-	    radians: 1 / exports.earthRadius,
-	    yards: 1 / 1.0936,
-	};
-	/**
-	 * Area of measurement factors based on 1 square meter.
-	 *
-	 * @memberof helpers
-	 * @type {Object}
-	 */
-	exports.areaFactors = {
-	    acres: 0.000247105,
-	    centimeters: 10000,
-	    centimetres: 10000,
-	    feet: 10.763910417,
-	    inches: 1550.003100006,
-	    kilometers: 0.000001,
-	    kilometres: 0.000001,
-	    meters: 1,
-	    metres: 1,
-	    miles: 3.86e-7,
-	    millimeters: 1000000,
-	    millimetres: 1000000,
-	    yards: 1.195990046,
-	};
-	/**
-	 * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
-	 *
-	 * @name feature
-	 * @param {Geometry} geometry input geometry
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature} a GeoJSON Feature
-	 * @example
-	 * var geometry = {
-	 *   "type": "Point",
-	 *   "coordinates": [110, 50]
-	 * };
-	 *
-	 * var feature = turf.feature(geometry);
-	 *
-	 * //=feature
-	 */
-	function feature(geom, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var feat = { type: "Feature" };
-	    if (options.id === 0 || options.id) {
-	        feat.id = options.id;
+	  action.disabled = function (graph) {
+	    var way = graph.entity(wayID);
+	    way = way.removeNode(''); // sanity check - remove any consecutive duplicates
+
+	    graph = graph.replace(way);
+	    var isClosed = way.isClosed();
+	    var nodes = graph.childNodes(way).slice(); // shallow copy
+
+	    if (isClosed) nodes.pop();
+	    var allowStraightAngles = false;
+
+	    if (vertexID !== undefined) {
+	      allowStraightAngles = true;
+	      nodes = nodeSubset(nodes, vertexID, isClosed);
+	      if (nodes.length !== 3) return 'end_vertex';
 	    }
-	    if (options.bbox) {
-	        feat.bbox = options.bbox;
+
+	    var coords = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
+
+	    if (score === null) {
+	      return 'not_squarish';
+	    } else if (score === 0) {
+	      return 'square_enough';
+	    } else {
+	      return false;
 	    }
-	    feat.properties = properties || {};
-	    feat.geometry = geom;
-	    return feat;
+	  };
+
+	  action.transitionable = true;
+	  return action;
 	}
-	exports.feature = feature;
-	/**
-	 * Creates a GeoJSON {@link Geometry} from a Geometry string type & coordinates.
-	 * For GeometryCollection type use `helpers.geometryCollection`
-	 *
-	 * @name geometry
-	 * @param {string} type Geometry Type
-	 * @param {Array<any>} coordinates Coordinates
-	 * @param {Object} [options={}] Optional Parameters
-	 * @returns {Geometry} a GeoJSON Geometry
-	 * @example
-	 * var type = "Point";
-	 * var coordinates = [110, 50];
-	 * var geometry = turf.geometry(type, coordinates);
-	 * // => geometry
-	 */
-	function geometry(type, coordinates, options) {
-	    switch (type) {
-	        case "Point": return point(coordinates).geometry;
-	        case "LineString": return lineString(coordinates).geometry;
-	        case "Polygon": return polygon(coordinates).geometry;
-	        case "MultiPoint": return multiPoint(coordinates).geometry;
-	        case "MultiLineString": return multiLineString(coordinates).geometry;
-	        case "MultiPolygon": return multiPolygon(coordinates).geometry;
-	        default: throw new Error(type + " is invalid");
+
+	//
+	// `turn` must be an `osmTurn` object
+	// see osm/intersection.js, pathToTurn()
+	//
+	// This specifies a restriction of type `restriction` when traveling from
+	// `turn.from.way` toward `turn.to.way` via `turn.via.node` OR `turn.via.ways`.
+	// (The action does not check that these entities form a valid intersection.)
+	//
+	// From, to, and via ways should be split before calling this action.
+	// (old versions of the code would split the ways here, but we no longer do it)
+	//
+	// For testing convenience, accepts a restrictionID to assign to the new
+	// relation. Normally, this will be undefined and the relation will
+	// automatically be assigned a new ID.
+	//
+
+	function actionRestrictTurn(turn, restrictionType, restrictionID) {
+	  return function (graph) {
+	    var fromWay = graph.entity(turn.from.way);
+	    var toWay = graph.entity(turn.to.way);
+	    var viaNode = turn.via.node && graph.entity(turn.via.node);
+	    var viaWays = turn.via.ways && turn.via.ways.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    var members = [];
+	    members.push({
+	      id: fromWay.id,
+	      type: 'way',
+	      role: 'from'
+	    });
+
+	    if (viaNode) {
+	      members.push({
+	        id: viaNode.id,
+	        type: 'node',
+	        role: 'via'
+	      });
+	    } else if (viaWays) {
+	      viaWays.forEach(function (viaWay) {
+	        members.push({
+	          id: viaWay.id,
+	          type: 'way',
+	          role: 'via'
+	        });
+	      });
 	    }
+
+	    members.push({
+	      id: toWay.id,
+	      type: 'way',
+	      role: 'to'
+	    });
+	    return graph.replace(osmRelation({
+	      id: restrictionID,
+	      tags: {
+	        type: 'restriction',
+	        restriction: restrictionType
+	      },
+	      members: members
+	    }));
+	  };
 	}
-	exports.geometry = geometry;
-	/**
-	 * Creates a {@link Point} {@link Feature} from a Position.
-	 *
-	 * @name point
-	 * @param {Array<number>} coordinates longitude, latitude position (each in decimal degrees)
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<Point>} a Point feature
-	 * @example
-	 * var point = turf.point([-75.343, 39.984]);
-	 *
-	 * //=point
-	 */
-	function point(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "Point",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.point = point;
-	/**
-	 * Creates a {@link Point} {@link FeatureCollection} from an Array of Point coordinates.
-	 *
-	 * @name points
-	 * @param {Array<Array<number>>} coordinates an array of Points
-	 * @param {Object} [properties={}] Translate these properties to each Feature
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]
-	 * associated with the FeatureCollection
-	 * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-	 * @returns {FeatureCollection<Point>} Point Feature
-	 * @example
-	 * var points = turf.points([
-	 *   [-75, 39],
-	 *   [-80, 45],
-	 *   [-78, 50]
-	 * ]);
-	 *
-	 * //=points
-	 */
-	function points(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    return featureCollection(coordinates.map(function (coords) {
-	        return point(coords, properties);
-	    }), options);
-	}
-	exports.points = points;
-	/**
-	 * Creates a {@link Polygon} {@link Feature} from an Array of LinearRings.
-	 *
-	 * @name polygon
-	 * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<Polygon>} Polygon Feature
-	 * @example
-	 * var polygon = turf.polygon([[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]], { name: 'poly1' });
-	 *
-	 * //=polygon
-	 */
-	function polygon(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
-	        var ring = coordinates_1[_i];
-	        if (ring.length < 4) {
-	            throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
-	        }
-	        for (var j = 0; j < ring[ring.length - 1].length; j++) {
-	            // Check if first point of Polygon contains two numbers
-	            if (ring[ring.length - 1][j] !== ring[0][j]) {
-	                throw new Error("First and last Position are not equivalent.");
-	            }
+
+	function actionRevert(id) {
+	  var action = function action(graph) {
+	    var entity = graph.hasEntity(id),
+	        base = graph.base().entities[id];
+
+	    if (entity && !base) {
+	      // entity will be removed..
+	      if (entity.type === 'node') {
+	        graph.parentWays(entity).forEach(function (parent) {
+	          parent = parent.removeNode(id);
+	          graph = graph.replace(parent);
+
+	          if (parent.isDegenerate()) {
+	            graph = actionDeleteWay(parent.id)(graph);
+	          }
+	        });
+	      }
+
+	      graph.parentRelations(entity).forEach(function (parent) {
+	        parent = parent.removeMembersWithID(id);
+	        graph = graph.replace(parent);
+
+	        if (parent.isDegenerate()) {
+	          graph = actionDeleteRelation(parent.id)(graph);
 	        }
+	      });
 	    }
-	    var geom = {
-	        type: "Polygon",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.polygon = polygon;
-	/**
-	 * Creates a {@link Polygon} {@link FeatureCollection} from an Array of Polygon coordinates.
-	 *
-	 * @name polygons
-	 * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygon coordinates
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-	 * @returns {FeatureCollection<Polygon>} Polygon FeatureCollection
-	 * @example
-	 * var polygons = turf.polygons([
-	 *   [[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]],
-	 *   [[[-15, 42], [-14, 46], [-12, 41], [-17, 44], [-15, 42]]],
-	 * ]);
-	 *
-	 * //=polygons
-	 */
-	function polygons(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    return featureCollection(coordinates.map(function (coords) {
-	        return polygon(coords, properties);
-	    }), options);
-	}
-	exports.polygons = polygons;
-	/**
-	 * Creates a {@link LineString} {@link Feature} from an Array of Positions.
-	 *
-	 * @name lineString
-	 * @param {Array<Array<number>>} coordinates an array of Positions
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<LineString>} LineString Feature
-	 * @example
-	 * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});
-	 * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});
-	 *
-	 * //=linestring1
-	 * //=linestring2
-	 */
-	function lineString(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    if (coordinates.length < 2) {
-	        throw new Error("coordinates must be an array of two or more positions");
-	    }
-	    var geom = {
-	        type: "LineString",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.lineString = lineString;
-	/**
-	 * Creates a {@link LineString} {@link FeatureCollection} from an Array of LineString coordinates.
-	 *
-	 * @name lineStrings
-	 * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]
-	 * associated with the FeatureCollection
-	 * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-	 * @returns {FeatureCollection<LineString>} LineString FeatureCollection
-	 * @example
-	 * var linestrings = turf.lineStrings([
-	 *   [[-24, 63], [-23, 60], [-25, 65], [-20, 69]],
-	 *   [[-14, 43], [-13, 40], [-15, 45], [-10, 49]]
-	 * ]);
-	 *
-	 * //=linestrings
-	 */
-	function lineStrings(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    return featureCollection(coordinates.map(function (coords) {
-	        return lineString(coords, properties);
-	    }), options);
-	}
-	exports.lineStrings = lineStrings;
-	/**
-	 * Takes one or more {@link Feature|Features} and creates a {@link FeatureCollection}.
-	 *
-	 * @name featureCollection
-	 * @param {Feature[]} features input features
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {FeatureCollection} FeatureCollection of Features
-	 * @example
-	 * var locationA = turf.point([-75.343, 39.984], {name: 'Location A'});
-	 * var locationB = turf.point([-75.833, 39.284], {name: 'Location B'});
-	 * var locationC = turf.point([-75.534, 39.123], {name: 'Location C'});
-	 *
-	 * var collection = turf.featureCollection([
-	 *   locationA,
-	 *   locationB,
-	 *   locationC
-	 * ]);
-	 *
-	 * //=collection
-	 */
-	function featureCollection(features, options) {
-	    if (options === void 0) { options = {}; }
-	    var fc = { type: "FeatureCollection" };
-	    if (options.id) {
-	        fc.id = options.id;
-	    }
-	    if (options.bbox) {
-	        fc.bbox = options.bbox;
-	    }
-	    fc.features = features;
-	    return fc;
-	}
-	exports.featureCollection = featureCollection;
-	/**
-	 * Creates a {@link Feature<MultiLineString>} based on a
-	 * coordinate array. Properties can be added optionally.
-	 *
-	 * @name multiLineString
-	 * @param {Array<Array<Array<number>>>} coordinates an array of LineStrings
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<MultiLineString>} a MultiLineString feature
-	 * @throws {Error} if no coordinates are passed
-	 * @example
-	 * var multiLine = turf.multiLineString([[[0,0],[10,10]]]);
-	 *
-	 * //=multiLine
-	 */
-	function multiLineString(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "MultiLineString",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.multiLineString = multiLineString;
-	/**
-	 * Creates a {@link Feature<MultiPoint>} based on a
-	 * coordinate array. Properties can be added optionally.
-	 *
-	 * @name multiPoint
-	 * @param {Array<Array<number>>} coordinates an array of Positions
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<MultiPoint>} a MultiPoint feature
-	 * @throws {Error} if no coordinates are passed
-	 * @example
-	 * var multiPt = turf.multiPoint([[0,0],[10,10]]);
-	 *
-	 * //=multiPt
-	 */
-	function multiPoint(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "MultiPoint",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.multiPoint = multiPoint;
-	/**
-	 * Creates a {@link Feature<MultiPolygon>} based on a
-	 * coordinate array. Properties can be added optionally.
-	 *
-	 * @name multiPolygon
-	 * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<MultiPolygon>} a multipolygon feature
-	 * @throws {Error} if no coordinates are passed
-	 * @example
-	 * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);
-	 *
-	 * //=multiPoly
-	 *
-	 */
-	function multiPolygon(coordinates, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "MultiPolygon",
-	        coordinates: coordinates,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.multiPolygon = multiPolygon;
-	/**
-	 * Creates a {@link Feature<GeometryCollection>} based on a
-	 * coordinate array. Properties can be added optionally.
-	 *
-	 * @name geometryCollection
-	 * @param {Array<Geometry>} geometries an array of GeoJSON Geometries
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature<GeometryCollection>} a GeoJSON GeometryCollection Feature
-	 * @example
-	 * var pt = turf.geometry("Point", [100, 0]);
-	 * var line = turf.geometry("LineString", [[101, 0], [102, 1]]);
-	 * var collection = turf.geometryCollection([pt, line]);
-	 *
-	 * // => collection
-	 */
-	function geometryCollection(geometries, properties, options) {
-	    if (options === void 0) { options = {}; }
-	    var geom = {
-	        type: "GeometryCollection",
-	        geometries: geometries,
-	    };
-	    return feature(geom, properties, options);
-	}
-	exports.geometryCollection = geometryCollection;
-	/**
-	 * Round number to precision
-	 *
-	 * @param {number} num Number
-	 * @param {number} [precision=0] Precision
-	 * @returns {number} rounded number
-	 * @example
-	 * turf.round(120.4321)
-	 * //=120
-	 *
-	 * turf.round(120.4321, 2)
-	 * //=120.43
-	 */
-	function round(num, precision) {
-	    if (precision === void 0) { precision = 0; }
-	    if (precision && !(precision >= 0)) {
-	        throw new Error("precision must be a positive number");
-	    }
-	    var multiplier = Math.pow(10, precision || 0);
-	    return Math.round(num * multiplier) / multiplier;
-	}
-	exports.round = round;
-	/**
-	 * Convert a distance measurement (assuming a spherical Earth) from radians to a more friendly unit.
-	 * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-	 *
-	 * @name radiansToLength
-	 * @param {number} radians in radians across the sphere
-	 * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-	 * meters, kilometres, kilometers.
-	 * @returns {number} distance
-	 */
-	function radiansToLength(radians, units) {
-	    if (units === void 0) { units = "kilometers"; }
-	    var factor = exports.factors[units];
-	    if (!factor) {
-	        throw new Error(units + " units is invalid");
-	    }
-	    return radians * factor;
-	}
-	exports.radiansToLength = radiansToLength;
-	/**
-	 * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into radians
-	 * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-	 *
-	 * @name lengthToRadians
-	 * @param {number} distance in real units
-	 * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-	 * meters, kilometres, kilometers.
-	 * @returns {number} radians
-	 */
-	function lengthToRadians(distance, units) {
-	    if (units === void 0) { units = "kilometers"; }
-	    var factor = exports.factors[units];
-	    if (!factor) {
-	        throw new Error(units + " units is invalid");
-	    }
-	    return distance / factor;
-	}
-	exports.lengthToRadians = lengthToRadians;
-	/**
-	 * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into degrees
-	 * Valid units: miles, nauticalmiles, inches, yards, meters, metres, centimeters, kilometres, feet
-	 *
-	 * @name lengthToDegrees
-	 * @param {number} distance in real units
-	 * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-	 * meters, kilometres, kilometers.
-	 * @returns {number} degrees
-	 */
-	function lengthToDegrees(distance, units) {
-	    return radiansToDegrees(lengthToRadians(distance, units));
-	}
-	exports.lengthToDegrees = lengthToDegrees;
-	/**
-	 * Converts any bearing angle from the north line direction (positive clockwise)
-	 * and returns an angle between 0-360 degrees (positive clockwise), 0 being the north line
-	 *
-	 * @name bearingToAzimuth
-	 * @param {number} bearing angle, between -180 and +180 degrees
-	 * @returns {number} angle between 0 and 360 degrees
-	 */
-	function bearingToAzimuth(bearing) {
-	    var angle = bearing % 360;
-	    if (angle < 0) {
-	        angle += 360;
-	    }
-	    return angle;
+
+	    return graph.revert(id);
+	  };
+
+	  return action;
 	}
-	exports.bearingToAzimuth = bearingToAzimuth;
-	/**
-	 * Converts an angle in radians to degrees
-	 *
-	 * @name radiansToDegrees
-	 * @param {number} radians angle in radians
-	 * @returns {number} degrees between 0 and 360 degrees
-	 */
-	function radiansToDegrees(radians) {
-	    var degrees = radians % (2 * Math.PI);
-	    return degrees * 180 / Math.PI;
+
+	function actionRotate(rotateIds, pivot, angle, projection) {
+	  var action = function action(graph) {
+	    return graph.update(function (graph) {
+	      utilGetAllNodes(rotateIds, graph).forEach(function (node) {
+	        var point = geoRotate([projection(node.loc)], angle, pivot)[0];
+	        graph = graph.replace(node.move(projection.invert(point)));
+	      });
+	    });
+	  };
+
+	  return action;
 	}
-	exports.radiansToDegrees = radiansToDegrees;
-	/**
-	 * Converts an angle in degrees to radians
-	 *
-	 * @name degreesToRadians
-	 * @param {number} degrees angle between 0 and 360 degrees
-	 * @returns {number} angle in radians
-	 */
-	function degreesToRadians(degrees) {
-	    var radians = degrees % 360;
-	    return radians * Math.PI / 180;
+
+	function actionScale(ids, pivotLoc, scaleFactor, projection) {
+	  return function (graph) {
+	    return graph.update(function (graph) {
+	      var point, radial;
+	      utilGetAllNodes(ids, graph).forEach(function (node) {
+	        point = projection(node.loc);
+	        radial = [point[0] - pivotLoc[0], point[1] - pivotLoc[1]];
+	        point = [pivotLoc[0] + scaleFactor * radial[0], pivotLoc[1] + scaleFactor * radial[1]];
+	        graph = graph.replace(node.move(projection.invert(point)));
+	      });
+	    });
+	  };
 	}
-	exports.degreesToRadians = degreesToRadians;
-	/**
-	 * Converts a length to the requested unit.
-	 * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-	 *
-	 * @param {number} length to be converted
-	 * @param {Units} [originalUnit="kilometers"] of the length
-	 * @param {Units} [finalUnit="kilometers"] returned unit
-	 * @returns {number} the converted length
-	 */
-	function convertLength(length, originalUnit, finalUnit) {
-	    if (originalUnit === void 0) { originalUnit = "kilometers"; }
-	    if (finalUnit === void 0) { finalUnit = "kilometers"; }
-	    if (!(length >= 0)) {
-	        throw new Error("length must be a positive number");
+
+	/* Align nodes along their common axis */
+
+	function actionStraightenNodes(nodeIDs, projection) {
+	  function positionAlongWay(a, o, b) {
+	    return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+	  } // returns the endpoints of the long axis of symmetry of the `points` bounding rect
+
+
+	  function getEndpoints(points) {
+	    var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
+	    // The shape's surrounding rectangle has 2 axes of symmetry.
+	    // Snap points to the long axis
+
+	    var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
+	    var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
+	    var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
+	    var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
+	    var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
+
+	    if (isLong) {
+	      return [p1, q1];
 	    }
-	    return radiansToLength(lengthToRadians(length, originalUnit), finalUnit);
-	}
-	exports.convertLength = convertLength;
-	/**
-	 * Converts a area to the requested unit.
-	 * Valid units: kilometers, kilometres, meters, metres, centimetres, millimeters, acres, miles, yards, feet, inches
-	 * @param {number} area to be converted
-	 * @param {Units} [originalUnit="meters"] of the distance
-	 * @param {Units} [finalUnit="kilometers"] returned unit
-	 * @returns {number} the converted distance
-	 */
-	function convertArea(area, originalUnit, finalUnit) {
-	    if (originalUnit === void 0) { originalUnit = "meters"; }
-	    if (finalUnit === void 0) { finalUnit = "kilometers"; }
-	    if (!(area >= 0)) {
-	        throw new Error("area must be a positive number");
+
+	    return [p2, q2];
+	  }
+
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var nodes = nodeIDs.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var endpoints = getEndpoints(points);
+	    var startPoint = endpoints[0];
+	    var endPoint = endpoints[1]; // Move points onto the line connecting the endpoints
+
+	    for (var i = 0; i < points.length; i++) {
+	      var node = nodes[i];
+	      var point = points[i];
+	      var u = positionAlongWay(point, startPoint, endPoint);
+	      var point2 = geoVecInterp(startPoint, endPoint, u);
+	      var loc2 = projection.invert(point2);
+	      graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
 	    }
-	    var startFactor = exports.areaFactors[originalUnit];
-	    if (!startFactor) {
-	        throw new Error("invalid original units");
+
+	    return graph;
+	  };
+
+	  action.disabled = function (graph) {
+	    var nodes = nodeIDs.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var endpoints = getEndpoints(points);
+	    var startPoint = endpoints[0];
+	    var endPoint = endpoints[1];
+	    var maxDistance = 0;
+
+	    for (var i = 0; i < points.length; i++) {
+	      var point = points[i];
+	      var u = positionAlongWay(point, startPoint, endPoint);
+	      var p = geoVecInterp(startPoint, endPoint, u);
+	      var dist = geoVecLength(p, point);
+
+	      if (!isNaN(dist) && dist > maxDistance) {
+	        maxDistance = dist;
+	      }
 	    }
-	    var finalFactor = exports.areaFactors[finalUnit];
-	    if (!finalFactor) {
-	        throw new Error("invalid final units");
+
+	    if (maxDistance < 0.0001) {
+	      return 'straight_enough';
 	    }
-	    return (area / startFactor) * finalFactor;
-	}
-	exports.convertArea = convertArea;
-	/**
-	 * isNumber
-	 *
-	 * @param {*} num Number to validate
-	 * @returns {boolean} true/false
-	 * @example
-	 * turf.isNumber(123)
-	 * //=true
-	 * turf.isNumber('foo')
-	 * //=false
-	 */
-	function isNumber(num) {
-	    return !isNaN(num) && num !== null && !Array.isArray(num) && !/^\s*$/.test(num);
-	}
-	exports.isNumber = isNumber;
-	/**
-	 * isObject
-	 *
-	 * @param {*} input variable to validate
-	 * @returns {boolean} true/false
-	 * @example
-	 * turf.isObject({elevation: 10})
-	 * //=true
-	 * turf.isObject('foo')
-	 * //=false
-	 */
-	function isObject(input) {
-	    return (!!input) && (input.constructor === Object);
+	  };
+
+	  action.transitionable = true;
+	  return action;
 	}
-	exports.isObject = isObject;
-	/**
-	 * Validate BBox
-	 *
-	 * @private
-	 * @param {Array<number>} bbox BBox to validate
-	 * @returns {void}
-	 * @throws Error if BBox is not valid
-	 * @example
-	 * validateBBox([-180, -40, 110, 50])
-	 * //=OK
-	 * validateBBox([-180, -40])
-	 * //=Error
-	 * validateBBox('Foo')
-	 * //=Error
-	 * validateBBox(5)
-	 * //=Error
-	 * validateBBox(null)
-	 * //=Error
-	 * validateBBox(undefined)
-	 * //=Error
+
+	/*
+	 * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
 	 */
-	function validateBBox(bbox) {
-	    if (!bbox) {
-	        throw new Error("bbox is required");
+
+	function actionStraightenWay(selectedIDs, projection) {
+	  function positionAlongWay(a, o, b) {
+	    return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+	  } // Return all selected ways as a continuous, ordered array of nodes
+
+
+	  function allNodes(graph) {
+	    var nodes = [];
+	    var startNodes = [];
+	    var endNodes = [];
+	    var remainingWays = [];
+	    var selectedWays = selectedIDs.filter(function (w) {
+	      return graph.entity(w).type === 'way';
+	    });
+	    var selectedNodes = selectedIDs.filter(function (n) {
+	      return graph.entity(n).type === 'node';
+	    });
+
+	    for (var i = 0; i < selectedWays.length; i++) {
+	      var way = graph.entity(selectedWays[i]);
+	      nodes = way.nodes.slice(0);
+	      remainingWays.push(nodes);
+	      startNodes.push(nodes[0]);
+	      endNodes.push(nodes[nodes.length - 1]);
+	    } // Remove duplicate end/startNodes (duplicate nodes cannot be at the line end,
+	    //   and need to be removed so currNode difference calculation below works)
+	    // i.e. ["n-1", "n-1", "n-2"] => ["n-2"]
+
+
+	    startNodes = startNodes.filter(function (n) {
+	      return startNodes.indexOf(n) === startNodes.lastIndexOf(n);
+	    });
+	    endNodes = endNodes.filter(function (n) {
+	      return endNodes.indexOf(n) === endNodes.lastIndexOf(n);
+	    }); // Choose the initial endpoint to start from
+
+	    var currNode = utilArrayDifference(startNodes, endNodes).concat(utilArrayDifference(endNodes, startNodes))[0];
+	    var nextWay = [];
+	    nodes = []; // Create nested function outside of loop to avoid "function in loop" lint error
+
+	    var getNextWay = function getNextWay(currNode, remainingWays) {
+	      return remainingWays.filter(function (way) {
+	        return way[0] === currNode || way[way.length - 1] === currNode;
+	      })[0];
+	    }; // Add nodes to end of nodes array, until all ways are added
+
+
+	    while (remainingWays.length) {
+	      nextWay = getNextWay(currNode, remainingWays);
+	      remainingWays = utilArrayDifference(remainingWays, [nextWay]);
+
+	      if (nextWay[0] !== currNode) {
+	        nextWay.reverse();
+	      }
+
+	      nodes = nodes.concat(nextWay);
+	      currNode = nodes[nodes.length - 1];
+	    } // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
+
+
+	    if (selectedNodes.length === 2) {
+	      var startNodeIdx = nodes.indexOf(selectedNodes[0]);
+	      var endNodeIdx = nodes.indexOf(selectedNodes[1]);
+	      var sortedStartEnd = [startNodeIdx, endNodeIdx];
+	      sortedStartEnd.sort(function (a, b) {
+	        return a - b;
+	      });
+	      nodes = nodes.slice(sortedStartEnd[0], sortedStartEnd[1] + 1);
 	    }
-	    if (!Array.isArray(bbox)) {
-	        throw new Error("bbox must be an Array");
+
+	    return nodes.map(function (n) {
+	      return graph.entity(n);
+	    });
+	  }
+
+	  function shouldKeepNode(node, graph) {
+	    return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+	  }
+
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var nodes = allNodes(graph);
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var startPoint = points[0];
+	    var endPoint = points[points.length - 1];
+	    var toDelete = [];
+	    var i;
+
+	    for (i = 1; i < points.length - 1; i++) {
+	      var node = nodes[i];
+	      var point = points[i];
+
+	      if (t < 1 || shouldKeepNode(node, graph)) {
+	        var u = positionAlongWay(point, startPoint, endPoint);
+	        var p = geoVecInterp(startPoint, endPoint, u);
+	        var loc2 = projection.invert(p);
+	        graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
+	      } else {
+	        // safe to delete
+	        if (toDelete.indexOf(node) === -1) {
+	          toDelete.push(node);
+	        }
+	      }
 	    }
-	    if (bbox.length !== 4 && bbox.length !== 6) {
-	        throw new Error("bbox must be an Array of 4 or 6 numbers");
+
+	    for (i = 0; i < toDelete.length; i++) {
+	      graph = actionDeleteNode(toDelete[i].id)(graph);
 	    }
-	    bbox.forEach(function (num) {
-	        if (!isNumber(num)) {
-	            throw new Error("bbox must only contain numbers");
-	        }
+
+	    return graph;
+	  };
+
+	  action.disabled = function (graph) {
+	    // check way isn't too bendy
+	    var nodes = allNodes(graph);
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
 	    });
-	}
-	exports.validateBBox = validateBBox;
-	/**
-	 * Validate Id
-	 *
-	 * @private
-	 * @param {string|number} id Id to validate
-	 * @returns {void}
-	 * @throws Error if Id is not valid
-	 * @example
-	 * validateId([-180, -40, 110, 50])
-	 * //=Error
-	 * validateId([-180, -40])
-	 * //=Error
-	 * validateId('Foo')
-	 * //=OK
-	 * validateId(5)
-	 * //=OK
-	 * validateId(null)
-	 * //=Error
-	 * validateId(undefined)
-	 * //=Error
-	 */
-	function validateId(id) {
-	    if (!id) {
-	        throw new Error("id is required");
+	    var startPoint = points[0];
+	    var endPoint = points[points.length - 1];
+	    var threshold = 0.2 * geoVecLength(startPoint, endPoint);
+	    var i;
+
+	    if (threshold === 0) {
+	      return 'too_bendy';
 	    }
-	    if (["string", "number"].indexOf(typeof id) === -1) {
-	        throw new Error("id must be a number or a string");
+
+	    var maxDistance = 0;
+
+	    for (i = 1; i < points.length - 1; i++) {
+	      var point = points[i];
+	      var u = positionAlongWay(point, startPoint, endPoint);
+	      var p = geoVecInterp(startPoint, endPoint, u);
+	      var dist = geoVecLength(p, point); // to bendy if point is off by 20% of total start/end distance in projected space
+
+	      if (isNaN(dist) || dist > threshold) {
+	        return 'too_bendy';
+	      } else if (dist > maxDistance) {
+	        maxDistance = dist;
+	      }
 	    }
+
+	    var keepingAllNodes = nodes.every(function (node, i) {
+	      return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
+	    });
+
+	    if (maxDistance < 0.0001 && // Allow straightening even if already straight in order to remove extraneous nodes
+	    keepingAllNodes) {
+	      return 'straight_enough';
+	    }
+	  };
+
+	  action.transitionable = true;
+	  return action;
 	}
-	exports.validateId = validateId;
-	// Deprecated methods
-	function radians2degrees() {
-	    throw new Error("method has been renamed to `radiansToDegrees`");
-	}
-	exports.radians2degrees = radians2degrees;
-	function degrees2radians() {
-	    throw new Error("method has been renamed to `degreesToRadians`");
-	}
-	exports.degrees2radians = degrees2radians;
-	function distanceToDegrees() {
-	    throw new Error("method has been renamed to `lengthToDegrees`");
-	}
-	exports.distanceToDegrees = distanceToDegrees;
-	function distanceToRadians() {
-	    throw new Error("method has been renamed to `lengthToRadians`");
-	}
-	exports.distanceToRadians = distanceToRadians;
-	function radiansToDistance() {
-	    throw new Error("method has been renamed to `radiansToLength`");
-	}
-	exports.radiansToDistance = radiansToDistance;
-	function bearingToAngle() {
-	    throw new Error("method has been renamed to `bearingToAzimuth`");
-	}
-	exports.bearingToAngle = bearingToAngle;
-	function convertDistance() {
-	    throw new Error("method has been renamed to `convertLength`");
+
+	//
+	// `turn` must be an `osmTurn` object with a `restrictionID` property.
+	// see osm/intersection.js, pathToTurn()
+	//
+
+	function actionUnrestrictTurn(turn) {
+	  return function (graph) {
+	    return actionDeleteRelation(turn.restrictionID)(graph);
+	  };
 	}
-	exports.convertDistance = convertDistance;
-	});
 
-	var invariant = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
+	/* Reflect the given area around its axis of symmetry */
 
-	/**
-	 * Unwrap a coordinate from a Point Feature, Geometry or a single coordinate.
-	 *
-	 * @name getCoord
-	 * @param {Array<number>|Geometry<Point>|Feature<Point>} coord GeoJSON Point or an Array of numbers
-	 * @returns {Array<number>} coordinates
-	 * @example
-	 * var pt = turf.point([10, 10]);
-	 *
-	 * var coord = turf.getCoord(pt);
-	 * //= [10, 10]
-	 */
-	function getCoord(coord) {
-	    if (!coord) {
-	        throw new Error("coord is required");
-	    }
-	    if (!Array.isArray(coord)) {
-	        if (coord.type === "Feature" && coord.geometry !== null && coord.geometry.type === "Point") {
-	            return coord.geometry.coordinates;
-	        }
-	        if (coord.type === "Point") {
-	            return coord.coordinates;
-	        }
-	    }
-	    if (Array.isArray(coord) && coord.length >= 2 && !Array.isArray(coord[0]) && !Array.isArray(coord[1])) {
-	        return coord;
+	function actionReflect(reflectIds, projection) {
+	  var _useLongAxis = true;
+
+	  var action = function action(graph, t) {
+	    if (t === null || !isFinite(t)) t = 1;
+	    t = Math.min(Math.max(+t, 0), 1);
+	    var nodes = utilGetAllNodes(reflectIds, graph);
+	    var points = nodes.map(function (n) {
+	      return projection(n.loc);
+	    });
+	    var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
+	    // The shape's surrounding rectangle has 2 axes of symmetry.
+	    // Reflect across the longer axis by default.
+
+	    var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
+	    var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
+	    var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
+	    var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
+	    var p, q;
+	    var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
+
+	    if (_useLongAxis && isLong || !_useLongAxis && !isLong) {
+	      p = p1;
+	      q = q1;
+	    } else {
+	      p = p2;
+	      q = q2;
+	    } // reflect c across pq
+	    // http://math.stackexchange.com/questions/65503/point-reflection-over-a-line
+
+
+	    var dx = q[0] - p[0];
+	    var dy = q[1] - p[1];
+	    var a = (dx * dx - dy * dy) / (dx * dx + dy * dy);
+	    var b = 2 * dx * dy / (dx * dx + dy * dy);
+
+	    for (var i = 0; i < nodes.length; i++) {
+	      var node = nodes[i];
+	      var c = projection(node.loc);
+	      var c2 = [a * (c[0] - p[0]) + b * (c[1] - p[1]) + p[0], b * (c[0] - p[0]) - a * (c[1] - p[1]) + p[1]];
+	      var loc2 = projection.invert(c2);
+	      node = node.move(geoVecInterp(node.loc, loc2, t));
+	      graph = graph.replace(node);
 	    }
-	    throw new Error("coord must be GeoJSON Point or an Array of numbers");
+
+	    return graph;
+	  };
+
+	  action.useLongAxis = function (val) {
+	    if (!arguments.length) return _useLongAxis;
+	    _useLongAxis = val;
+	    return action;
+	  };
+
+	  action.transitionable = true;
+	  return action;
 	}
-	exports.getCoord = getCoord;
-	/**
-	 * Unwrap coordinates from a Feature, Geometry Object or an Array
-	 *
-	 * @name getCoords
-	 * @param {Array<any>|Geometry|Feature} coords Feature, Geometry Object or an Array
-	 * @returns {Array<any>} coordinates
-	 * @example
-	 * var poly = turf.polygon([[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]);
-	 *
-	 * var coords = turf.getCoords(poly);
-	 * //= [[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]
-	 */
-	function getCoords(coords) {
-	    if (Array.isArray(coords)) {
-	        return coords;
-	    }
-	    // Feature
-	    if (coords.type === "Feature") {
-	        if (coords.geometry !== null) {
-	            return coords.geometry.coordinates;
+
+	function actionUpgradeTags(entityId, oldTags, replaceTags) {
+	  return function (graph) {
+	    var entity = graph.entity(entityId);
+	    var tags = Object.assign({}, entity.tags); // shallow copy
+
+	    var transferValue;
+	    var semiIndex;
+
+	    for (var oldTagKey in oldTags) {
+	      if (!(oldTagKey in tags)) continue; // wildcard match
+
+	      if (oldTags[oldTagKey] === '*') {
+	        // note the value since we might need to transfer it
+	        transferValue = tags[oldTagKey];
+	        delete tags[oldTagKey]; // exact match
+	      } else if (oldTags[oldTagKey] === tags[oldTagKey]) {
+	        delete tags[oldTagKey]; // match is within semicolon-delimited values
+	      } else {
+	        var vals = tags[oldTagKey].split(';').filter(Boolean);
+	        var oldIndex = vals.indexOf(oldTags[oldTagKey]);
+
+	        if (vals.length === 1 || oldIndex === -1) {
+	          delete tags[oldTagKey];
+	        } else {
+	          if (replaceTags && replaceTags[oldTagKey]) {
+	            // replacing a value within a semicolon-delimited value, note the index
+	            semiIndex = oldIndex;
+	          }
+
+	          vals.splice(oldIndex, 1);
+	          tags[oldTagKey] = vals.join(';');
 	        }
+	      }
 	    }
-	    else {
-	        // Geometry
-	        if (coords.coordinates) {
-	            return coords.coordinates;
+
+	    if (replaceTags) {
+	      for (var replaceKey in replaceTags) {
+	        var replaceValue = replaceTags[replaceKey];
+
+	        if (replaceValue === '*') {
+	          if (tags[replaceKey] && tags[replaceKey] !== 'no') {
+	            // allow any pre-existing value except `no` (troll tag)
+	            continue;
+	          } else {
+	            // otherwise assume `yes` is okay
+	            tags[replaceKey] = 'yes';
+	          }
+	        } else if (replaceValue === '$1') {
+	          tags[replaceKey] = transferValue;
+	        } else {
+	          if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
+	            // don't override preexisting values
+	            var existingVals = tags[replaceKey].split(';').filter(Boolean);
+
+	            if (existingVals.indexOf(replaceValue) === -1) {
+	              existingVals.splice(semiIndex, 0, replaceValue);
+	              tags[replaceKey] = existingVals.join(';');
+	            }
+	          } else {
+	            tags[replaceKey] = replaceValue;
+	          }
 	        }
+	      }
 	    }
-	    throw new Error("coords must be GeoJSON Feature, Geometry Object or an Array");
+
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
+	  };
 	}
-	exports.getCoords = getCoords;
-	/**
-	 * Checks if coordinates contains a number
-	 *
-	 * @name containsNumber
-	 * @param {Array<any>} coordinates GeoJSON Coordinates
-	 * @returns {boolean} true if Array contains a number
-	 */
-	function containsNumber(coordinates) {
-	    if (coordinates.length > 1 && helpers$1.isNumber(coordinates[0]) && helpers$1.isNumber(coordinates[1])) {
-	        return true;
-	    }
-	    if (Array.isArray(coordinates[0]) && coordinates[0].length) {
-	        return containsNumber(coordinates[0]);
-	    }
-	    throw new Error("coordinates must only contain numbers");
+
+	function behaviorEdit(context) {
+	  function behavior() {
+	    context.map().minzoom(context.minEditableZoom());
+	  }
+
+	  behavior.off = function () {
+	    context.map().minzoom(0);
+	  };
+
+	  return behavior;
 	}
-	exports.containsNumber = containsNumber;
-	/**
-	 * Enforce expectations about types of GeoJSON objects for Turf.
-	 *
-	 * @name geojsonType
-	 * @param {GeoJSON} value any GeoJSON object
-	 * @param {string} type expected GeoJSON type
-	 * @param {string} name name of calling function
-	 * @throws {Error} if value is not the expected type.
+
+	/*
+	   The hover behavior adds the `.hover` class on pointerover to all elements to which
+	   the identical datum is bound, and removes it on pointerout.
+
+	   The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
+	   representation may consist of several elements scattered throughout the DOM hierarchy.
+	   Only one of these elements can have the :hover pseudo-class, but all of them will
+	   have the .hover class.
 	 */
-	function geojsonType(value, type, name) {
-	    if (!type || !name) {
-	        throw new Error("type and name required");
-	    }
-	    if (!value || value.type !== type) {
-	        throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + value.type);
+
+	function behaviorHover(context) {
+	  var dispatch$1 = dispatch('hover');
+
+	  var _selection = select(null);
+
+	  var _newNodeId = null;
+	  var _initialNodeID = null;
+
+	  var _altDisables;
+
+	  var _ignoreVertex;
+
+	  var _targets = []; // use pointer events on supported platforms; fallback to mouse events
+
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+
+	  function keydown(d3_event) {
+	    if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);
+
+	      _selection.classed('hover-disabled', true);
+
+	      dispatch$1.call('hover', this, null);
 	    }
-	}
-	exports.geojsonType = geojsonType;
-	/**
-	 * Enforce expectations about types of {@link Feature} inputs for Turf.
-	 * Internally this uses {@link geojsonType} to judge geometry types.
-	 *
-	 * @name featureOf
-	 * @param {Feature} feature a feature with an expected geometry type
-	 * @param {string} type expected GeoJSON type
-	 * @param {string} name name of calling function
-	 * @throws {Error} error if value is not the expected type.
-	 */
-	function featureOf(feature, type, name) {
-	    if (!feature) {
-	        throw new Error("No feature passed");
+	  }
+
+	  function keyup(d3_event) {
+	    if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);
+
+	      _selection.classed('hover-disabled', false);
+
+	      dispatch$1.call('hover', this, _targets);
 	    }
-	    if (!name) {
-	        throw new Error(".featureOf() requires a name");
+	  }
+
+	  function behavior(selection) {
+	    _selection = selection;
+	    _targets = [];
+
+	    if (_initialNodeID) {
+	      _newNodeId = _initialNodeID;
+	      _initialNodeID = null;
+	    } else {
+	      _newNodeId = null;
 	    }
-	    if (!feature || feature.type !== "Feature" || !feature.geometry) {
-	        throw new Error("Invalid input to " + name + ", Feature with geometry required");
+
+	    _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
+	    .on(_pointerPrefix + 'down.hover', pointerover);
+
+	    select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);
+
+	    function eventTarget(d3_event) {
+	      var datum = d3_event.target && d3_event.target.__data__;
+	      if (_typeof(datum) !== 'object') return null;
+
+	      if (!(datum instanceof osmEntity) && datum.properties && datum.properties.entity instanceof osmEntity) {
+	        return datum.properties.entity;
+	      }
+
+	      return datum;
 	    }
-	    if (!feature.geometry || feature.geometry.type !== type) {
-	        throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
+
+	    function pointerover(d3_event) {
+	      // ignore mouse hovers with buttons pressed unless dragging
+	      if (context.mode().id.indexOf('drag') === -1 && (!d3_event.pointerType || d3_event.pointerType === 'mouse') && d3_event.buttons) return;
+	      var target = eventTarget(d3_event);
+
+	      if (target && _targets.indexOf(target) === -1) {
+	        _targets.push(target);
+
+	        updateHover(d3_event, _targets);
+	      }
 	    }
-	}
-	exports.featureOf = featureOf;
-	/**
-	 * Enforce expectations about types of {@link FeatureCollection} inputs for Turf.
-	 * Internally this uses {@link geojsonType} to judge geometry types.
-	 *
-	 * @name collectionOf
-	 * @param {FeatureCollection} featureCollection a FeatureCollection for which features will be judged
-	 * @param {string} type expected GeoJSON type
-	 * @param {string} name name of calling function
-	 * @throws {Error} if value is not the expected type.
-	 */
-	function collectionOf(featureCollection, type, name) {
-	    if (!featureCollection) {
-	        throw new Error("No featureCollection passed");
+
+	    function pointerout(d3_event) {
+	      var target = eventTarget(d3_event);
+
+	      var index = _targets.indexOf(target);
+
+	      if (index !== -1) {
+	        _targets.splice(index);
+
+	        updateHover(d3_event, _targets);
+	      }
 	    }
-	    if (!name) {
-	        throw new Error(".collectionOf() requires a name");
+
+	    function allowsVertex(d) {
+	      return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
 	    }
-	    if (!featureCollection || featureCollection.type !== "FeatureCollection") {
-	        throw new Error("Invalid input to " + name + ", FeatureCollection required");
+
+	    function modeAllowsHover(target) {
+	      var mode = context.mode();
+
+	      if (mode.id === 'add-point') {
+	        return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
+	      }
+
+	      return true;
 	    }
-	    for (var _i = 0, _a = featureCollection.features; _i < _a.length; _i++) {
-	        var feature = _a[_i];
-	        if (!feature || feature.type !== "Feature" || !feature.geometry) {
-	            throw new Error("Invalid input to " + name + ", Feature with geometry required");
+
+	    function updateHover(d3_event, targets) {
+	      _selection.selectAll('.hover').classed('hover', false);
+
+	      _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
+
+	      var mode = context.mode();
+
+	      if (!_newNodeId && (mode.id === 'draw-line' || mode.id === 'draw-area')) {
+	        var node = targets.find(function (target) {
+	          return target instanceof osmEntity && target.type === 'node';
+	        });
+	        _newNodeId = node && node.id;
+	      }
+
+	      targets = targets.filter(function (datum) {
+	        if (datum instanceof osmEntity) {
+	          // If drawing a way, don't hover on a node that was just placed. #3974
+	          return datum.id !== _newNodeId && (datum.type !== 'node' || !_ignoreVertex || allowsVertex(datum)) && modeAllowsHover(datum);
 	        }
-	        if (!feature.geometry || feature.geometry.type !== type) {
-	            throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
+
+	        return true;
+	      });
+	      var selector = '';
+
+	      for (var i in targets) {
+	        var datum = targets[i]; // What are we hovering over?
+
+	        if (datum.__featurehash__) {
+	          // hovering custom data
+	          selector += ', .data' + datum.__featurehash__;
+	        } else if (datum instanceof QAItem) {
+	          selector += ', .' + datum.service + '.itemId-' + datum.id;
+	        } else if (datum instanceof osmNote) {
+	          selector += ', .note-' + datum.id;
+	        } else if (datum instanceof osmEntity) {
+	          selector += ', .' + datum.id;
+
+	          if (datum.type === 'relation') {
+	            for (var j in datum.members) {
+	              selector += ', .' + datum.members[j].id;
+	            }
+	          }
 	        }
+	      }
+
+	      var suppressed = _altDisables && d3_event && d3_event.altKey;
+
+	      if (selector.trim().length) {
+	        // remove the first comma
+	        selector = selector.slice(1);
+
+	        _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);
+	      }
+
+	      dispatch$1.call('hover', this, !suppressed && targets);
 	    }
+	  }
+
+	  behavior.off = function (selection) {
+	    selection.selectAll('.hover').classed('hover', false);
+	    selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
+	    selection.classed('hover-disabled', false);
+	    selection.on(_pointerPrefix + 'over.hover', null).on(_pointerPrefix + 'out.hover', null).on(_pointerPrefix + 'down.hover', null);
+	    select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', null, true).on('keydown.hover', null).on('keyup.hover', null);
+	  };
+
+	  behavior.altDisables = function (val) {
+	    if (!arguments.length) return _altDisables;
+	    _altDisables = val;
+	    return behavior;
+	  };
+
+	  behavior.ignoreVertex = function (val) {
+	    if (!arguments.length) return _ignoreVertex;
+	    _ignoreVertex = val;
+	    return behavior;
+	  };
+
+	  behavior.initialNodeID = function (nodeId) {
+	    _initialNodeID = nodeId;
+	    return behavior;
+	  };
+
+	  return utilRebind(behavior, dispatch$1, 'on');
 	}
-	exports.collectionOf = collectionOf;
-	/**
-	 * Get Geometry from Feature or Geometry Object
-	 *
-	 * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
-	 * @returns {Geometry|null} GeoJSON Geometry Object
-	 * @throws {Error} if geojson is not a Feature or Geometry Object
-	 * @example
-	 * var point = {
-	 *   "type": "Feature",
-	 *   "properties": {},
-	 *   "geometry": {
-	 *     "type": "Point",
-	 *     "coordinates": [110, 40]
-	 *   }
-	 * }
-	 * var geom = turf.getGeom(point)
-	 * //={"type": "Point", "coordinates": [110, 40]}
-	 */
-	function getGeom(geojson) {
-	    if (geojson.type === "Feature") {
-	        return geojson.geometry;
+
+	var _disableSpace = false;
+	var _lastSpace = null;
+	function behaviorDraw(context) {
+	  var dispatch$1 = dispatch('move', 'down', 'downcancel', 'click', 'clickWay', 'clickNode', 'undo', 'cancel', 'finish');
+	  var keybinding = utilKeybinding('draw');
+
+	  var _hover = behaviorHover(context).altDisables(true).ignoreVertex(true).on('hover', context.ui().sidebar.hover);
+
+	  var _edit = behaviorEdit(context);
+
+	  var _closeTolerance = 4;
+	  var _tolerance = 12;
+	  var _mouseLeave = false;
+	  var _lastMouse = null;
+
+	  var _lastPointerUpEvent;
+
+	  var _downPointer; // use pointer events on supported platforms; fallback to mouse events
+
+
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
+	  // - `mode/drag_node.js` `datum()`
+
+
+	  function datum(d3_event) {
+	    var mode = context.mode();
+	    var isNote = mode && mode.id.indexOf('note') !== -1;
+	    if (d3_event.altKey || isNote) return {};
+	    var element;
+
+	    if (d3_event.type === 'keydown') {
+	      element = _lastMouse && _lastMouse.target;
+	    } else {
+	      element = d3_event.target;
+	    } // When drawing, snap only to touch targets..
+	    // (this excludes area fills and active drawing elements)
+
+
+	    var d = element.__data__;
+	    return d && d.properties && d.properties.target ? d : {};
+	  }
+
+	  function pointerdown(d3_event) {
+	    if (_downPointer) return;
+	    var pointerLocGetter = utilFastMouse(this);
+	    _downPointer = {
+	      id: d3_event.pointerId || 'mouse',
+	      pointerLocGetter: pointerLocGetter,
+	      downTime: +new Date(),
+	      downLoc: pointerLocGetter(d3_event)
+	    };
+	    dispatch$1.call('down', this, d3_event, datum(d3_event));
+	  }
+
+	  function pointerup(d3_event) {
+	    if (!_downPointer || _downPointer.id !== (d3_event.pointerId || 'mouse')) return;
+	    var downPointer = _downPointer;
+	    _downPointer = null;
+	    _lastPointerUpEvent = d3_event;
+	    if (downPointer.isCancelled) return;
+	    var t2 = +new Date();
+	    var p2 = downPointer.pointerLocGetter(d3_event);
+	    var dist = geoVecLength(downPointer.downLoc, p2);
+
+	    if (dist < _closeTolerance || dist < _tolerance && t2 - downPointer.downTime < 500) {
+	      // Prevent a quick second click
+	      select(window).on('click.draw-block', function () {
+	        d3_event.stopPropagation();
+	      }, true);
+	      context.map().dblclickZoomEnable(false);
+	      window.setTimeout(function () {
+	        context.map().dblclickZoomEnable(true);
+	        select(window).on('click.draw-block', null);
+	      }, 500);
+	      click(d3_event, p2);
 	    }
-	    return geojson;
-	}
-	exports.getGeom = getGeom;
-	/**
-	 * Get GeoJSON object's type, Geometry type is prioritize.
-	 *
-	 * @param {GeoJSON} geojson GeoJSON object
-	 * @param {string} [name="geojson"] name of the variable to display in error message
-	 * @returns {string} GeoJSON type
-	 * @example
-	 * var point = {
-	 *   "type": "Feature",
-	 *   "properties": {},
-	 *   "geometry": {
-	 *     "type": "Point",
-	 *     "coordinates": [110, 40]
-	 *   }
-	 * }
-	 * var geom = turf.getType(point)
-	 * //="Point"
-	 */
-	function getType(geojson, name) {
-	    if (geojson.type === "FeatureCollection") {
-	        return "FeatureCollection";
+	  }
+
+	  function pointermove(d3_event) {
+	    if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
+	      var p2 = _downPointer.pointerLocGetter(d3_event);
+
+	      var dist = geoVecLength(_downPointer.downLoc, p2);
+
+	      if (dist >= _closeTolerance) {
+	        _downPointer.isCancelled = true;
+	        dispatch$1.call('downcancel', this);
+	      }
 	    }
-	    if (geojson.type === "GeometryCollection") {
-	        return "GeometryCollection";
+
+	    if (d3_event.pointerType && d3_event.pointerType !== 'mouse' || d3_event.buttons || _downPointer) return; // HACK: Mobile Safari likes to send one or more `mouse` type pointermove
+	    // events immediately after non-mouse pointerup events; detect and ignore them.
+
+	    if (_lastPointerUpEvent && _lastPointerUpEvent.pointerType !== 'mouse' && d3_event.timeStamp - _lastPointerUpEvent.timeStamp < 100) return;
+	    _lastMouse = d3_event;
+	    dispatch$1.call('move', this, d3_event, datum(d3_event));
+	  }
+
+	  function pointercancel(d3_event) {
+	    if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
+	      if (!_downPointer.isCancelled) {
+	        dispatch$1.call('downcancel', this);
+	      }
+
+	      _downPointer = null;
 	    }
-	    if (geojson.type === "Feature" && geojson.geometry !== null) {
-	        return geojson.geometry.type;
+	  }
+
+	  function mouseenter() {
+	    _mouseLeave = false;
+	  }
+
+	  function mouseleave() {
+	    _mouseLeave = true;
+	  }
+
+	  function allowsVertex(d) {
+	    return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+	  } // related code
+	  // - `mode/drag_node.js`     `doMove()`
+	  // - `behavior/draw.js`      `click()`
+	  // - `behavior/draw_way.js`  `move()`
+
+
+	  function click(d3_event, loc) {
+	    var d = datum(d3_event);
+	    var target = d && d.properties && d.properties.entity;
+	    var mode = context.mode();
+
+	    if (target && target.type === 'node' && allowsVertex(target)) {
+	      // Snap to a node
+	      dispatch$1.call('clickNode', this, target, d);
+	      return;
+	    } else if (target && target.type === 'way' && (mode.id !== 'add-point' || mode.preset.matchGeometry('vertex'))) {
+	      // Snap to a way
+	      var choice = geoChooseEdge(context.graph().childNodes(target), loc, context.projection, context.activeID());
+
+	      if (choice) {
+	        var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
+	        dispatch$1.call('clickWay', this, choice.loc, edge, d);
+	        return;
+	      }
+	    } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
+	      var locLatLng = context.projection.invert(loc);
+	      dispatch$1.call('click', this, locLatLng, d);
 	    }
-	    return geojson.type;
+	  } // treat a spacebar press like a click
+
+
+	  function space(d3_event) {
+	    d3_event.preventDefault();
+	    d3_event.stopPropagation();
+	    var currSpace = context.map().mouse();
+
+	    if (_disableSpace && _lastSpace) {
+	      var dist = geoVecLength(_lastSpace, currSpace);
+
+	      if (dist > _tolerance) {
+	        _disableSpace = false;
+	      }
+	    }
+
+	    if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click
+
+	    _lastSpace = currSpace;
+	    _disableSpace = true;
+	    select(window).on('keyup.space-block', function () {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      _disableSpace = false;
+	      select(window).on('keyup.space-block', null);
+	    }); // get the current mouse position
+
+	    var loc = context.map().mouse() || // or the map center if the mouse has never entered the map
+	    context.projection(context.map().center());
+	    click(d3_event, loc);
+	  }
+
+	  function backspace(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch$1.call('undo');
+	  }
+
+	  function del(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch$1.call('cancel');
+	  }
+
+	  function ret(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch$1.call('finish');
+	  }
+
+	  function behavior(selection) {
+	    context.install(_hover);
+	    context.install(_edit);
+	    _downPointer = null;
+	    keybinding.on('⌫', backspace).on('⌦', del).on('⎋', ret).on('↩', ret).on('space', space).on('⌥space', space);
+	    selection.on('mouseenter.draw', mouseenter).on('mouseleave.draw', mouseleave).on(_pointerPrefix + 'down.draw', pointerdown).on(_pointerPrefix + 'move.draw', pointermove);
+	    select(window).on(_pointerPrefix + 'up.draw', pointerup, true).on('pointercancel.draw', pointercancel, true);
+	    select(document).call(keybinding);
+	    return behavior;
+	  }
+
+	  behavior.off = function (selection) {
+	    context.ui().sidebar.hover.cancel();
+	    context.uninstall(_hover);
+	    context.uninstall(_edit);
+	    selection.on('mouseenter.draw', null).on('mouseleave.draw', null).on(_pointerPrefix + 'down.draw', null).on(_pointerPrefix + 'move.draw', null);
+	    select(window).on(_pointerPrefix + 'up.draw', null).on('pointercancel.draw', null); // note: keyup.space-block, click.draw-block should remain
+
+	    select(document).call(keybinding.unbind);
+	  };
+
+	  behavior.hover = function () {
+	    return _hover;
+	  };
+
+	  return utilRebind(behavior, dispatch$1, 'on');
+	}
+
+	function initRange(domain, range) {
+	  switch (arguments.length) {
+	    case 0:
+	      break;
+
+	    case 1:
+	      this.range(domain);
+	      break;
+
+	    default:
+	      this.range(range).domain(domain);
+	      break;
+	  }
+
+	  return this;
+	}
+
+	function constants(x) {
+	  return function () {
+	    return x;
+	  };
+	}
+
+	function number$1(x) {
+	  return +x;
+	}
+
+	var unit = [0, 1];
+	function identity$3(x) {
+	  return x;
+	}
+
+	function normalize$1(a, b) {
+	  return (b -= a = +a) ? function (x) {
+	    return (x - a) / b;
+	  } : constants(isNaN(b) ? NaN : 0.5);
+	}
+
+	function clamper(a, b) {
+	  var t;
+	  if (a > b) t = a, a = b, b = t;
+	  return function (x) {
+	    return Math.max(a, Math.min(b, x));
+	  };
+	} // normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
+	// interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
+
+
+	function bimap(domain, range, interpolate) {
+	  var d0 = domain[0],
+	      d1 = domain[1],
+	      r0 = range[0],
+	      r1 = range[1];
+	  if (d1 < d0) d0 = normalize$1(d1, d0), r0 = interpolate(r1, r0);else d0 = normalize$1(d0, d1), r0 = interpolate(r0, r1);
+	  return function (x) {
+	    return r0(d0(x));
+	  };
+	}
+
+	function polymap(domain, range, interpolate) {
+	  var j = Math.min(domain.length, range.length) - 1,
+	      d = new Array(j),
+	      r = new Array(j),
+	      i = -1; // Reverse descending domains.
+
+	  if (domain[j] < domain[0]) {
+	    domain = domain.slice().reverse();
+	    range = range.slice().reverse();
+	  }
+
+	  while (++i < j) {
+	    d[i] = normalize$1(domain[i], domain[i + 1]);
+	    r[i] = interpolate(range[i], range[i + 1]);
+	  }
+
+	  return function (x) {
+	    var i = bisectRight(domain, x, 1, j) - 1;
+	    return r[i](d[i](x));
+	  };
+	}
+
+	function copy(source, target) {
+	  return target.domain(source.domain()).range(source.range()).interpolate(source.interpolate()).clamp(source.clamp()).unknown(source.unknown());
+	}
+	function transformer$1() {
+	  var domain = unit,
+	      range = unit,
+	      interpolate$1 = interpolate,
+	      transform,
+	      untransform,
+	      unknown,
+	      clamp = identity$3,
+	      piecewise,
+	      output,
+	      input;
+
+	  function rescale() {
+	    var n = Math.min(domain.length, range.length);
+	    if (clamp !== identity$3) clamp = clamper(domain[0], domain[n - 1]);
+	    piecewise = n > 2 ? polymap : bimap;
+	    output = input = null;
+	    return scale;
+	  }
+
+	  function scale(x) {
+	    return isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate$1)))(transform(clamp(x)));
+	  }
+
+	  scale.invert = function (y) {
+	    return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
+	  };
+
+	  scale.domain = function (_) {
+	    return arguments.length ? (domain = Array.from(_, number$1), rescale()) : domain.slice();
+	  };
+
+	  scale.range = function (_) {
+	    return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
+	  };
+
+	  scale.rangeRound = function (_) {
+	    return range = Array.from(_), interpolate$1 = interpolateRound, rescale();
+	  };
+
+	  scale.clamp = function (_) {
+	    return arguments.length ? (clamp = _ ? true : identity$3, rescale()) : clamp !== identity$3;
+	  };
+
+	  scale.interpolate = function (_) {
+	    return arguments.length ? (interpolate$1 = _, rescale()) : interpolate$1;
+	  };
+
+	  scale.unknown = function (_) {
+	    return arguments.length ? (unknown = _, scale) : unknown;
+	  };
+
+	  return function (t, u) {
+	    transform = t, untransform = u;
+	    return rescale();
+	  };
+	}
+	function continuous() {
+	  return transformer$1()(identity$3, identity$3);
+	}
+
+	function formatDecimal (x) {
+	  return Math.abs(x = Math.round(x)) >= 1e21 ? x.toLocaleString("en").replace(/,/g, "") : x.toString(10);
+	} // Computes the decimal coefficient and exponent of the specified number x with
+	// significant digits p, where x is positive and p is in [1, 21] or undefined.
+	// For example, formatDecimalParts(1.23) returns ["123", 0].
+
+	function formatDecimalParts(x, p) {
+	  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
+
+	  var i,
+	      coefficient = x.slice(0, i); // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
+	  // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
+
+	  return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
+	}
+
+	function exponent (x) {
+	  return x = formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
+	}
+
+	function formatGroup (grouping, thousands) {
+	  return function (value, width) {
+	    var i = value.length,
+	        t = [],
+	        j = 0,
+	        g = grouping[0],
+	        length = 0;
+
+	    while (i > 0 && g > 0) {
+	      if (length + g + 1 > width) g = Math.max(1, width - length);
+	      t.push(value.substring(i -= g, i + g));
+	      if ((length += g + 1) > width) break;
+	      g = grouping[j = (j + 1) % grouping.length];
+	    }
+
+	    return t.reverse().join(thousands);
+	  };
+	}
+
+	function formatNumerals (numerals) {
+	  return function (value) {
+	    return value.replace(/[0-9]/g, function (i) {
+	      return numerals[+i];
+	    });
+	  };
+	}
+
+	// [[fill]align][sign][symbol][0][width][,][.precision][~][type]
+	var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
+	function formatSpecifier(specifier) {
+	  if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
+	  var match;
+	  return new FormatSpecifier({
+	    fill: match[1],
+	    align: match[2],
+	    sign: match[3],
+	    symbol: match[4],
+	    zero: match[5],
+	    width: match[6],
+	    comma: match[7],
+	    precision: match[8] && match[8].slice(1),
+	    trim: match[9],
+	    type: match[10]
+	  });
+	}
+	formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
+
+	function FormatSpecifier(specifier) {
+	  this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
+	  this.align = specifier.align === undefined ? ">" : specifier.align + "";
+	  this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
+	  this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
+	  this.zero = !!specifier.zero;
+	  this.width = specifier.width === undefined ? undefined : +specifier.width;
+	  this.comma = !!specifier.comma;
+	  this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
+	  this.trim = !!specifier.trim;
+	  this.type = specifier.type === undefined ? "" : specifier.type + "";
 	}
-	exports.getType = getType;
-	});
-
-	var lineclip_1 = lineclip;
-	var _default = lineclip;
-
-	lineclip.polyline = lineclip;
-	lineclip.polygon = polygonclip;
 
+	FormatSpecifier.prototype.toString = function () {
+	  return this.fill + this.align + this.sign + this.symbol + (this.zero ? "0" : "") + (this.width === undefined ? "" : Math.max(1, this.width | 0)) + (this.comma ? "," : "") + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0)) + (this.trim ? "~" : "") + this.type;
+	};
 
-	// Cohen-Sutherland line clippign algorithm, adapted to efficiently
-	// handle polylines rather than just segments
+	// Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
+	function formatTrim (s) {
+	  out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
+	    switch (s[i]) {
+	      case ".":
+	        i0 = i1 = i;
+	        break;
 
-	function lineclip(points, bbox, result) {
+	      case "0":
+	        if (i0 === 0) i0 = i;
+	        i1 = i;
+	        break;
 
-	    var len = points.length,
-	        codeA = bitCode(points[0], bbox),
-	        part = [],
-	        i, a, b, codeB, lastCode;
+	      default:
+	        if (!+s[i]) break out;
+	        if (i0 > 0) i0 = 0;
+	        break;
+	    }
+	  }
 
-	    if (!result) { result = []; }
+	  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
+	}
 
-	    for (i = 1; i < len; i++) {
-	        a = points[i - 1];
-	        b = points[i];
-	        codeB = lastCode = bitCode(b, bbox);
+	// `thisNumberValue` abstract operation
+	// https://tc39.github.io/ecma262/#sec-thisnumbervalue
+	var thisNumberValue = function (value) {
+	  if (typeof value != 'number' && classofRaw(value) != 'Number') {
+	    throw TypeError('Incorrect invocation');
+	  }
+	  return +value;
+	};
 
-	        while (true) {
+	// `String.prototype.repeat` method implementation
+	// https://tc39.github.io/ecma262/#sec-string.prototype.repeat
+	var stringRepeat = ''.repeat || function repeat(count) {
+	  var str = String(requireObjectCoercible(this));
+	  var result = '';
+	  var n = toInteger(count);
+	  if (n < 0 || n == Infinity) throw RangeError('Wrong number of repetitions');
+	  for (;n > 0; (n >>>= 1) && (str += str)) if (n & 1) result += str;
+	  return result;
+	};
 
-	            if (!(codeA | codeB)) { // accept
-	                part.push(a);
+	var nativeToFixed = 1.0.toFixed;
+	var floor$6 = Math.floor;
 
-	                if (codeB !== lastCode) { // segment went outside
-	                    part.push(b);
+	var pow$2 = function (x, n, acc) {
+	  return n === 0 ? acc : n % 2 === 1 ? pow$2(x, n - 1, acc * x) : pow$2(x * x, n / 2, acc);
+	};
 
-	                    if (i < len - 1) { // start a new line
-	                        result.push(part);
-	                        part = [];
-	                    }
-	                } else if (i === len - 1) {
-	                    part.push(b);
-	                }
-	                break;
+	var log$2 = function (x) {
+	  var n = 0;
+	  var x2 = x;
+	  while (x2 >= 4096) {
+	    n += 12;
+	    x2 /= 4096;
+	  }
+	  while (x2 >= 2) {
+	    n += 1;
+	    x2 /= 2;
+	  } return n;
+	};
 
-	            } else if (codeA & codeB) { // trivial reject
-	                break;
+	var FORCED$c = nativeToFixed && (
+	  0.00008.toFixed(3) !== '0.000' ||
+	  0.9.toFixed(0) !== '1' ||
+	  1.255.toFixed(2) !== '1.25' ||
+	  1000000000000000128.0.toFixed(0) !== '1000000000000000128'
+	) || !fails(function () {
+	  // V8 ~ Android 4.3-
+	  nativeToFixed.call({});
+	});
 
-	            } else if (codeA) { // a outside, intersect with clip edge
-	                a = intersect(a, b, codeA, bbox);
-	                codeA = bitCode(a, bbox);
+	// `Number.prototype.toFixed` method
+	// https://tc39.github.io/ecma262/#sec-number.prototype.tofixed
+	_export({ target: 'Number', proto: true, forced: FORCED$c }, {
+	  // eslint-disable-next-line max-statements
+	  toFixed: function toFixed(fractionDigits) {
+	    var number = thisNumberValue(this);
+	    var fractDigits = toInteger(fractionDigits);
+	    var data = [0, 0, 0, 0, 0, 0];
+	    var sign = '';
+	    var result = '0';
+	    var e, z, j, k;
+
+	    var multiply = function (n, c) {
+	      var index = -1;
+	      var c2 = c;
+	      while (++index < 6) {
+	        c2 += n * data[index];
+	        data[index] = c2 % 1e7;
+	        c2 = floor$6(c2 / 1e7);
+	      }
+	    };
 
-	            } else { // b outside
-	                b = intersect(a, b, codeB, bbox);
-	                codeB = bitCode(b, bbox);
-	            }
-	        }
+	    var divide = function (n) {
+	      var index = 6;
+	      var c = 0;
+	      while (--index >= 0) {
+	        c += data[index];
+	        data[index] = floor$6(c / n);
+	        c = (c % n) * 1e7;
+	      }
+	    };
 
-	        codeA = lastCode;
+	    var dataToString = function () {
+	      var index = 6;
+	      var s = '';
+	      while (--index >= 0) {
+	        if (s !== '' || index === 0 || data[index] !== 0) {
+	          var t = String(data[index]);
+	          s = s === '' ? t : s + stringRepeat.call('0', 7 - t.length) + t;
+	        }
+	      } return s;
+	    };
+
+	    if (fractDigits < 0 || fractDigits > 20) throw RangeError('Incorrect fraction digits');
+	    // eslint-disable-next-line no-self-compare
+	    if (number != number) return 'NaN';
+	    if (number <= -1e21 || number >= 1e21) return String(number);
+	    if (number < 0) {
+	      sign = '-';
+	      number = -number;
+	    }
+	    if (number > 1e-21) {
+	      e = log$2(number * pow$2(2, 69, 1)) - 69;
+	      z = e < 0 ? number * pow$2(2, -e, 1) : number / pow$2(2, e, 1);
+	      z *= 0x10000000000000;
+	      e = 52 - e;
+	      if (e > 0) {
+	        multiply(0, z);
+	        j = fractDigits;
+	        while (j >= 7) {
+	          multiply(1e7, 0);
+	          j -= 7;
+	        }
+	        multiply(pow$2(10, j, 1), 0);
+	        j = e - 1;
+	        while (j >= 23) {
+	          divide(1 << 23);
+	          j -= 23;
+	        }
+	        divide(1 << j);
+	        multiply(1, 1);
+	        divide(2);
+	        result = dataToString();
+	      } else {
+	        multiply(0, z);
+	        multiply(1 << -e, 0);
+	        result = dataToString() + stringRepeat.call('0', fractDigits);
+	      }
 	    }
+	    if (fractDigits > 0) {
+	      k = result.length;
+	      result = sign + (k <= fractDigits
+	        ? '0.' + stringRepeat.call('0', fractDigits - k) + result
+	        : result.slice(0, k - fractDigits) + '.' + result.slice(k - fractDigits));
+	    } else {
+	      result = sign + result;
+	    } return result;
+	  }
+	});
 
-	    if (part.length) { result.push(part); }
-
-	    return result;
-	}
+	var nativeToPrecision = 1.0.toPrecision;
 
-	// Sutherland-Hodgeman polygon clipping algorithm
+	var FORCED$d = fails(function () {
+	  // IE7-
+	  return nativeToPrecision.call(1, undefined) !== '1';
+	}) || !fails(function () {
+	  // V8 ~ Android 4.3-
+	  nativeToPrecision.call({});
+	});
 
-	function polygonclip(points, bbox) {
+	// `Number.prototype.toPrecision` method
+	// https://tc39.github.io/ecma262/#sec-number.prototype.toprecision
+	_export({ target: 'Number', proto: true, forced: FORCED$d }, {
+	  toPrecision: function toPrecision(precision) {
+	    return precision === undefined
+	      ? nativeToPrecision.call(thisNumberValue(this))
+	      : nativeToPrecision.call(thisNumberValue(this), precision);
+	  }
+	});
 
-	    var result, edge, prev, prevInside, i, p, inside;
+	var prefixExponent;
+	function formatPrefixAuto (x, p) {
+	  var d = formatDecimalParts(x, p);
+	  if (!d) return x + "";
+	  var coefficient = d[0],
+	      exponent = d[1],
+	      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
+	      n = coefficient.length;
+	  return i === n ? coefficient : i > n ? coefficient + new Array(i - n + 1).join("0") : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i) : "0." + new Array(1 - i).join("0") + formatDecimalParts(x, Math.max(0, p + i - 1))[0]; // less than 1y!
+	}
 
-	    // clip against each side of the clip rectangle
-	    for (edge = 1; edge <= 8; edge *= 2) {
-	        result = [];
-	        prev = points[points.length - 1];
-	        prevInside = !(bitCode(prev, bbox) & edge);
+	function formatRounded (x, p) {
+	  var d = formatDecimalParts(x, p);
+	  if (!d) return x + "";
+	  var coefficient = d[0],
+	      exponent = d[1];
+	  return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1) : coefficient + new Array(exponent - coefficient.length + 2).join("0");
+	}
 
-	        for (i = 0; i < points.length; i++) {
-	            p = points[i];
-	            inside = !(bitCode(p, bbox) & edge);
+	var formatTypes = {
+	  "%": function _(x, p) {
+	    return (x * 100).toFixed(p);
+	  },
+	  "b": function b(x) {
+	    return Math.round(x).toString(2);
+	  },
+	  "c": function c(x) {
+	    return x + "";
+	  },
+	  "d": formatDecimal,
+	  "e": function e(x, p) {
+	    return x.toExponential(p);
+	  },
+	  "f": function f(x, p) {
+	    return x.toFixed(p);
+	  },
+	  "g": function g(x, p) {
+	    return x.toPrecision(p);
+	  },
+	  "o": function o(x) {
+	    return Math.round(x).toString(8);
+	  },
+	  "p": function p(x, _p) {
+	    return formatRounded(x * 100, _p);
+	  },
+	  "r": formatRounded,
+	  "s": formatPrefixAuto,
+	  "X": function X(x) {
+	    return Math.round(x).toString(16).toUpperCase();
+	  },
+	  "x": function x(_x) {
+	    return Math.round(_x).toString(16);
+	  }
+	};
 
-	            // if segment goes through the clip window, add an intersection
-	            if (inside !== prevInside) { result.push(intersect(prev, p, edge, bbox)); }
+	function identity$4 (x) {
+	  return x;
+	}
 
-	            if (inside) { result.push(p); } // add a point if it's inside
+	var map = Array.prototype.map,
+	    prefixes = ["y", "z", "a", "f", "p", "n", "µ", "m", "", "k", "M", "G", "T", "P", "E", "Z", "Y"];
+	function formatLocale (locale) {
+	  var group = locale.grouping === undefined || locale.thousands === undefined ? identity$4 : formatGroup(map.call(locale.grouping, Number), locale.thousands + ""),
+	      currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
+	      currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
+	      decimal = locale.decimal === undefined ? "." : locale.decimal + "",
+	      numerals = locale.numerals === undefined ? identity$4 : formatNumerals(map.call(locale.numerals, String)),
+	      percent = locale.percent === undefined ? "%" : locale.percent + "",
+	      minus = locale.minus === undefined ? "−" : locale.minus + "",
+	      nan = locale.nan === undefined ? "NaN" : locale.nan + "";
 
-	            prev = p;
-	            prevInside = inside;
-	        }
+	  function newFormat(specifier) {
+	    specifier = formatSpecifier(specifier);
+	    var fill = specifier.fill,
+	        align = specifier.align,
+	        sign = specifier.sign,
+	        symbol = specifier.symbol,
+	        zero = specifier.zero,
+	        width = specifier.width,
+	        comma = specifier.comma,
+	        precision = specifier.precision,
+	        trim = specifier.trim,
+	        type = specifier.type; // The "n" type is an alias for ",g".
 
-	        points = result;
+	    if (type === "n") comma = true, type = "g"; // The "" type, and any invalid type, is an alias for ".12~g".
+	    else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = "g"; // If zero fill is specified, padding goes after sign and before digits.
 
-	        if (!points.length) { break; }
-	    }
+	    if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "="; // Compute the prefix and suffix.
+	    // For SI-prefix, the suffix is lazily computed.
 
-	    return result;
-	}
+	    var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
+	        suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : ""; // What format function should we use?
+	    // Is this an integer type?
+	    // Can this type generate exponential notation?
 
-	// intersect a segment against one of the 4 lines that make up the bbox
+	    var formatType = formatTypes[type],
+	        maybeSuffix = /[defgprs%]/.test(type); // Set the default precision if not specified,
+	    // or clamp the specified precision to the supported range.
+	    // For significant precision, it must be in [1, 21].
+	    // For fixed precision, it must be in [0, 20].
 
-	function intersect(a, b, edge, bbox) {
-	    return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
-	           edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
-	           edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
-	           edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
-	           null;
-	}
+	    precision = precision === undefined ? 6 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));
 
-	// bit code reflects the point position relative to the bbox:
+	    function format(value) {
+	      var valuePrefix = prefix,
+	          valueSuffix = suffix,
+	          i,
+	          n,
+	          c;
 
-	//         left  mid  right
-	//    top  1001  1000  1010
-	//    mid  0001  0000  0010
-	// bottom  0101  0100  0110
+	      if (type === "c") {
+	        valueSuffix = formatType(value) + valueSuffix;
+	        value = "";
+	      } else {
+	        value = +value; // Determine the sign. -0 is not less than 0, but 1 / -0 is!
 
-	function bitCode(p, bbox) {
-	    var code = 0;
+	        var valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.
 
-	    if (p[0] < bbox[0]) { code |= 1; } // left
-	    else if (p[0] > bbox[2]) { code |= 2; } // right
+	        value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.
 
-	    if (p[1] < bbox[1]) { code |= 4; } // bottom
-	    else if (p[1] > bbox[3]) { code |= 8; } // top
+	        if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
 
-	    return code;
-	}
-	lineclip_1.default = _default;
+	        if (valueNegative && +value === 0 && sign !== "+") valueNegative = false; // Compute the prefix and suffix.
 
-	var bboxClip_1 = createCommonjsModule(function (module, exports) {
-	var __importStar = (commonjsGlobal && commonjsGlobal.__importStar) || function (mod) {
-	    if (mod && mod.__esModule) { return mod; }
-	    var result = {};
-	    if (mod != null) { for (var k in mod) { if (Object.hasOwnProperty.call(mod, k)) { result[k] = mod[k]; } } }
-	    result["default"] = mod;
-	    return result;
-	};
-	Object.defineProperty(exports, "__esModule", { value: true });
+	        valuePrefix = (valueNegative ? sign === "(" ? sign : minus : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
+	        valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : ""); // Break the formatted value into the integer “value” part that can be
+	        // grouped, and fractional or exponential “suffix” part that is not.
 
+	        if (maybeSuffix) {
+	          i = -1, n = value.length;
 
-	var lineclip = __importStar(lineclip_1);
-	/**
-	 * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
-	 * [lineclip](https://github.com/mapbox/lineclip).
-	 * May result in degenerate edges when clipping Polygons.
-	 *
-	 * @name bboxClip
-	 * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
-	 * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
-	 * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
-	 * @example
-	 * var bbox = [0, 0, 10, 10];
-	 * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
-	 *
-	 * var clipped = turf.bboxClip(poly, bbox);
-	 *
-	 * //addToMap
-	 * var addToMap = [bbox, poly, clipped]
-	 */
-	function bboxClip(feature, bbox) {
-	    var geom = invariant.getGeom(feature);
-	    var type = geom.type;
-	    var properties = feature.type === "Feature" ? feature.properties : {};
-	    var coords = geom.coordinates;
-	    switch (type) {
-	        case "LineString":
-	        case "MultiLineString":
-	            var lines_1 = [];
-	            if (type === "LineString") {
-	                coords = [coords];
-	            }
-	            coords.forEach(function (line) {
-	                lineclip.polyline(line, bbox, lines_1);
-	            });
-	            if (lines_1.length === 1) {
-	                return helpers$1.lineString(lines_1[0], properties);
-	            }
-	            return helpers$1.multiLineString(lines_1, properties);
-	        case "Polygon":
-	            return helpers$1.polygon(clipPolygon(coords, bbox), properties);
-	        case "MultiPolygon":
-	            return helpers$1.multiPolygon(coords.map(function (poly) {
-	                return clipPolygon(poly, bbox);
-	            }), properties);
-	        default:
-	            throw new Error("geometry " + type + " not supported");
-	    }
-	}
-	exports.default = bboxClip;
-	function clipPolygon(rings, bbox) {
-	    var outRings = [];
-	    for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
-	        var ring = rings_1[_i];
-	        var clipped = lineclip.polygon(ring, bbox);
-	        if (clipped.length > 0) {
-	            if (clipped[0][0] !== clipped[clipped.length - 1][0] || clipped[0][1] !== clipped[clipped.length - 1][1]) {
-	                clipped.push(clipped[0]);
-	            }
-	            if (clipped.length >= 4) {
-	                outRings.push(clipped);
+	          while (++i < n) {
+	            if (c = value.charCodeAt(i), 48 > c || c > 57) {
+	              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
+	              value = value.slice(0, i);
+	              break;
 	            }
+	          }
 	        }
-	    }
-	    return outRings;
-	}
-	});
+	      } // If the fill character is not "0", grouping is applied before padding.
 
-	var fastJsonStableStringify = function (data, opts) {
-	    if (!opts) { opts = {}; }
-	    if (typeof opts === 'function') { opts = { cmp: opts }; }
-	    var cycles = (typeof opts.cycles === 'boolean') ? opts.cycles : false;
-
-	    var cmp = opts.cmp && (function (f) {
-	        return function (node) {
-	            return function (a, b) {
-	                var aobj = { key: a, value: node[a] };
-	                var bobj = { key: b, value: node[b] };
-	                return f(aobj, bobj);
-	            };
-	        };
-	    })(opts.cmp);
 
-	    var seen = [];
-	    return (function stringify (node) {
-	        if (node && node.toJSON && typeof node.toJSON === 'function') {
-	            node = node.toJSON();
-	        }
+	      if (comma && !zero) value = group(value, Infinity); // Compute the padding.
 
-	        if (node === undefined) { return; }
-	        if (typeof node == 'number') { return isFinite(node) ? '' + node : 'null'; }
-	        if (typeof node !== 'object') { return JSON.stringify(node); }
+	      var length = valuePrefix.length + value.length + valueSuffix.length,
+	          padding = length < width ? new Array(width - length + 1).join(fill) : ""; // If the fill character is "0", grouping is applied after padding.
 
-	        var i, out;
-	        if (Array.isArray(node)) {
-	            out = '[';
-	            for (i = 0; i < node.length; i++) {
-	                if (i) { out += ','; }
-	                out += stringify(node[i]) || 'null';
-	            }
-	            return out + ']';
-	        }
+	      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; // Reconstruct the final output based on the desired alignment.
 
-	        if (node === null) { return 'null'; }
+	      switch (align) {
+	        case "<":
+	          value = valuePrefix + value + valueSuffix + padding;
+	          break;
 
-	        if (seen.indexOf(node) !== -1) {
-	            if (cycles) { return JSON.stringify('__cycle__'); }
-	            throw new TypeError('Converting circular structure to JSON');
-	        }
+	        case "=":
+	          value = valuePrefix + padding + value + valueSuffix;
+	          break;
 
-	        var seenIndex = seen.push(node) - 1;
-	        var keys = Object.keys(node).sort(cmp && cmp(node));
-	        out = '';
-	        for (i = 0; i < keys.length; i++) {
-	            var key = keys[i];
-	            var value = stringify(node[key]);
+	        case "^":
+	          value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
+	          break;
 
-	            if (!value) { continue; }
-	            if (out) { out += ','; }
-	            out += JSON.stringify(key) + ':' + value;
-	        }
-	        seen.splice(seenIndex, 1);
-	        return '{' + out + '}';
-	    })(data);
-	};
+	        default:
+	          value = padding + valuePrefix + value + valueSuffix;
+	          break;
+	      }
 
-	function DEFAULT_COMPARE (a, b) { return a > b ? 1 : a < b ? -1 : 0; }
+	      return numerals(value);
+	    }
 
-	var SplayTree = function SplayTree(compare, noDuplicates) {
-	  if ( compare === void 0 ) compare = DEFAULT_COMPARE;
-	  if ( noDuplicates === void 0 ) noDuplicates = false;
+	    format.toString = function () {
+	      return specifier + "";
+	    };
 
-	  this._compare = compare;
-	  this._root = null;
-	  this._size = 0;
-	  this._noDuplicates = !!noDuplicates;
-	};
+	    return format;
+	  }
+
+	  function formatPrefix(specifier, value) {
+	    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
+	        e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
+	        k = Math.pow(10, -e),
+	        prefix = prefixes[8 + e / 3];
+	    return function (value) {
+	      return f(k * value) + prefix;
+	    };
+	  }
 
-	var prototypeAccessors = { size: { configurable: true } };
+	  return {
+	    format: newFormat,
+	    formatPrefix: formatPrefix
+	  };
+	}
 
+	var locale;
+	var format;
+	var formatPrefix;
+	defaultLocale({
+	  thousands: ",",
+	  grouping: [3],
+	  currency: ["$", ""]
+	});
+	function defaultLocale(definition) {
+	  locale = formatLocale(definition);
+	  format = locale.format;
+	  formatPrefix = locale.formatPrefix;
+	  return locale;
+	}
 
-	SplayTree.prototype.rotateLeft = function rotateLeft (x) {
-	  var y = x.right;
-	  if (y) {
-	    x.right = y.left;
-	    if (y.left) { y.left.parent = x; }
-	    y.parent = x.parent;
-	  }
+	function precisionFixed (step) {
+	  return Math.max(0, -exponent(Math.abs(step)));
+	}
 
-	  if (!x.parent)              { this._root = y; }
-	  else if (x === x.parent.left) { x.parent.left = y; }
-	  else                        { x.parent.right = y; }
-	  if (y) { y.left = x; }
-	  x.parent = y;
-	};
+	function precisionPrefix (step, value) {
+	  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
+	}
 
+	function precisionRound (step, max) {
+	  step = Math.abs(step), max = Math.abs(max) - step;
+	  return Math.max(0, exponent(max) - exponent(step)) + 1;
+	}
 
-	SplayTree.prototype.rotateRight = function rotateRight (x) {
-	  var y = x.left;
-	  if (y) {
-	    x.left = y.right;
-	    if (y.right) { y.right.parent = x; }
-	    y.parent = x.parent;
-	  }
+	function tickFormat(start, stop, count, specifier) {
+	  var step = tickStep(start, stop, count),
+	      precision;
+	  specifier = formatSpecifier(specifier == null ? ",f" : specifier);
 
-	  if (!x.parent)             { this._root = y; }
-	  else if(x === x.parent.left) { x.parent.left = y; }
-	  else                       { x.parent.right = y; }
-	  if (y) { y.right = x; }
-	  x.parent = y;
-	};
+	  switch (specifier.type) {
+	    case "s":
+	      {
+	        var value = Math.max(Math.abs(start), Math.abs(stop));
+	        if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
+	        return formatPrefix(specifier, value);
+	      }
 
+	    case "":
+	    case "e":
+	    case "g":
+	    case "p":
+	    case "r":
+	      {
+	        if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
+	        break;
+	      }
 
-	SplayTree.prototype._splay = function _splay (x) {
-	  while (x.parent) {
-	    var p = x.parent;
-	    if (!p.parent) {
-	      if (p.left === x) { this.rotateRight(p); }
-	      else            { this.rotateLeft(p); }
-	    } else if (p.left === x && p.parent.left === p) {
-	      this.rotateRight(p.parent);
-	      this.rotateRight(p);
-	    } else if (p.right === x && p.parent.right === p) {
-	      this.rotateLeft(p.parent);
-	      this.rotateLeft(p);
-	    } else if (p.left === x && p.parent.right === p) {
-	      this.rotateRight(p);
-	      this.rotateLeft(p);
-	    } else {
-	      this.rotateLeft(p);
-	      this.rotateRight(p);
-	    }
+	    case "f":
+	    case "%":
+	      {
+	        if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
+	        break;
+	      }
 	  }
-	};
 
+	  return format(specifier);
+	}
 
-	SplayTree.prototype.splay = function splay (x) {
-	  var p, gp, ggp, l, r;
+	function linearish(scale) {
+	  var domain = scale.domain;
 
-	  while (x.parent) {
-	    p = x.parent;
-	    gp = p.parent;
+	  scale.ticks = function (count) {
+	    var d = domain();
+	    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+	  };
 
-	    if (gp && gp.parent) {
-	      ggp = gp.parent;
-	      if (ggp.left === gp) { ggp.left= x; }
-	      else               { ggp.right = x; }
-	      x.parent = ggp;
-	    } else {
-	      x.parent = null;
-	      this._root = x;
-	    }
+	  scale.tickFormat = function (count, specifier) {
+	    var d = domain();
+	    return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
+	  };
 
-	    l = x.left; r = x.right;
+	  scale.nice = function (count) {
+	    if (count == null) count = 10;
+	    var d = domain();
+	    var i0 = 0;
+	    var i1 = d.length - 1;
+	    var start = d[i0];
+	    var stop = d[i1];
+	    var prestep;
+	    var step;
+	    var maxIter = 10;
 
-	    if (x === p.left) { // left
-	      if (gp) {
-	        if (gp.left === p) {
-	          /* zig-zig */
-	          if (p.right) {
-	            gp.left = p.right;
-	            gp.left.parent = gp;
-	          } else { gp.left = null; }
+	    if (stop < start) {
+	      step = start, start = stop, stop = step;
+	      step = i0, i0 = i1, i1 = step;
+	    }
 
-	          p.right = gp;
-	          gp.parent = p;
-	        } else {
-	          /* zig-zag */
-	          if (l) {
-	            gp.right = l;
-	            l.parent = gp;
-	          } else { gp.right = null; }
-
-	          x.left  = gp;
-	          gp.parent = x;
-	        }
-	      }
-	      if (r) {
-	        p.left = r;
-	        r.parent = p;
-	      } else { p.left = null; }
-
-	      x.right= p;
-	      p.parent = x;
-	    } else { // right
-	      if (gp) {
-	        if (gp.right === p) {
-	          /* zig-zig */
-	          if (p.left) {
-	            gp.right = p.left;
-	            gp.right.parent = gp;
-	          } else { gp.right = null; }
-
-	          p.left = gp;
-	          gp.parent = p;
-	        } else {
-	          /* zig-zag */
-	          if (r) {
-	            gp.left = r;
-	            r.parent = gp;
-	          } else { gp.left = null; }
+	    while (maxIter-- > 0) {
+	      step = tickIncrement(start, stop, count);
 
-	          x.right = gp;
-	          gp.parent = x;
-	        }
+	      if (step === prestep) {
+	        d[i0] = start;
+	        d[i1] = stop;
+	        return domain(d);
+	      } else if (step > 0) {
+	        start = Math.floor(start / step) * step;
+	        stop = Math.ceil(stop / step) * step;
+	      } else if (step < 0) {
+	        start = Math.ceil(start * step) / step;
+	        stop = Math.floor(stop * step) / step;
+	      } else {
+	        break;
 	      }
-	      if (l) {
-	        p.right = l;
-	        l.parent = p;
-	      } else { p.right = null; }
 
-	      x.left = p;
-	      p.parent = x;
+	      prestep = step;
 	    }
-	  }
-	};
 
+	    return scale;
+	  };
 
-	SplayTree.prototype.replace = function replace (u, v) {
-	  if (!u.parent) { this._root = v; }
-	  else if (u === u.parent.left) { u.parent.left = v; }
-	  else { u.parent.right = v; }
-	  if (v) { v.parent = u.parent; }
-	};
-
+	  return scale;
+	}
+	function linear$2() {
+	  var scale = continuous();
 
-	SplayTree.prototype.minNode = function minNode (u) {
-	    if ( u === void 0 ) u = this._root;
+	  scale.copy = function () {
+	    return copy(scale, linear$2());
+	  };
 
-	  if (u) { while (u.left) { u = u.left; } }
-	  return u;
-	};
+	  initRange.apply(scale, arguments);
+	  return linearish(scale);
+	}
 
+	var nativeExpm1 = Math.expm1;
+	var exp$1 = Math.exp;
 
-	SplayTree.prototype.maxNode = function maxNode (u) {
-	    if ( u === void 0 ) u = this._root;
+	// `Math.expm1` method implementation
+	// https://tc39.github.io/ecma262/#sec-math.expm1
+	var mathExpm1 = (!nativeExpm1
+	  // Old FF bug
+	  || nativeExpm1(10) > 22025.465794806719 || nativeExpm1(10) < 22025.4657948067165168
+	  // Tor Browser bug
+	  || nativeExpm1(-2e-17) != -2e-17
+	) ? function expm1(x) {
+	  return (x = +x) == 0 ? x : x > -1e-6 && x < 1e-6 ? x + x * x / 2 : exp$1(x) - 1;
+	} : nativeExpm1;
 
-	  if (u) { while (u.right) { u = u.right; } }
-	  return u;
-	};
+	function quantize() {
+	  var x0 = 0,
+	      x1 = 1,
+	      n = 1,
+	      domain = [0.5],
+	      range = [0, 1],
+	      unknown;
 
+	  function scale(x) {
+	    return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
+	  }
 
-	SplayTree.prototype.insert = function insert (key, data) {
-	  var z = this._root;
-	  var p = null;
-	  var comp = this._compare;
-	  var cmp;
+	  function rescale() {
+	    var i = -1;
+	    domain = new Array(n);
 
-	  if (this._noDuplicates) {
-	    while (z) {
-	      p = z;
-	      cmp = comp(z.key, key);
-	      if (cmp === 0) { return; }
-	      else if (comp(z.key, key) < 0) { z = z.right; }
-	      else { z = z.left; }
-	    }
-	  } else {
-	    while (z) {
-	      p = z;
-	      if (comp(z.key, key) < 0) { z = z.right; }
-	      else { z = z.left; }
+	    while (++i < n) {
+	      domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
 	    }
+
+	    return scale;
 	  }
 
-	  z = { key: key, data: data, left: null, right: null, parent: p };
+	  scale.domain = function (_) {
+	    var _ref, _ref2;
+
+	    return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
+	  };
 
-	  if (!p)                        { this._root = z; }
-	  else if (comp(p.key, z.key) < 0) { p.right = z; }
-	  else                           { p.left= z; }
+	  scale.range = function (_) {
+	    return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
+	  };
 
-	  this.splay(z);
-	  this._size++;
-	  return z;
-	};
+	  scale.invertExtent = function (y) {
+	    var i = range.indexOf(y);
+	    return i < 0 ? [NaN, NaN] : i < 1 ? [x0, domain[0]] : i >= n ? [domain[n - 1], x1] : [domain[i - 1], domain[i]];
+	  };
 
+	  scale.unknown = function (_) {
+	    return arguments.length ? (unknown = _, scale) : scale;
+	  };
 
-	SplayTree.prototype.find = function find (key) {
-	  var z  = this._root;
-	  var comp = this._compare;
-	  while (z) {
-	    var cmp = comp(z.key, key);
-	    if    (cmp < 0) { z = z.right; }
-	    else if (cmp > 0) { z = z.left; }
-	    else            { return z; }
-	  }
-	  return null;
-	};
+	  scale.thresholds = function () {
+	    return domain.slice();
+	  };
 
-	/**
-	 * Whether the tree contains a node with the given key
-	 * @param{Key} key
-	 * @return {boolean} true/false
-	 */
-	SplayTree.prototype.contains = function contains (key) {
-	  var node     = this._root;
-	  var comparator = this._compare;
-	  while (node){
-	    var cmp = comparator(key, node.key);
-	    if    (cmp === 0) { return true; }
-	    else if (cmp < 0) { node = node.left; }
-	    else              { node = node.right; }
-	  }
+	  scale.copy = function () {
+	    return quantize().domain([x0, x1]).range(range).unknown(unknown);
+	  };
 
-	  return false;
-	};
+	  return initRange.apply(linearish(scale), arguments);
+	}
 
+	// https://github.com/tc39/proposal-string-pad-start-end
+
+
+
+
+	var ceil$1 = Math.ceil;
+
+	// `String.prototype.{ padStart, padEnd }` methods implementation
+	var createMethod$6 = function (IS_END) {
+	  return function ($this, maxLength, fillString) {
+	    var S = String(requireObjectCoercible($this));
+	    var stringLength = S.length;
+	    var fillStr = fillString === undefined ? ' ' : String(fillString);
+	    var intMaxLength = toLength(maxLength);
+	    var fillLen, stringFiller;
+	    if (intMaxLength <= stringLength || fillStr == '') return S;
+	    fillLen = intMaxLength - stringLength;
+	    stringFiller = stringRepeat.call(fillStr, ceil$1(fillLen / fillStr.length));
+	    if (stringFiller.length > fillLen) stringFiller = stringFiller.slice(0, fillLen);
+	    return IS_END ? S + stringFiller : stringFiller + S;
+	  };
+	};
+
+	var stringPad = {
+	  // `String.prototype.padStart` method
+	  // https://tc39.github.io/ecma262/#sec-string.prototype.padstart
+	  start: createMethod$6(false),
+	  // `String.prototype.padEnd` method
+	  // https://tc39.github.io/ecma262/#sec-string.prototype.padend
+	  end: createMethod$6(true)
+	};
+
+	var padStart = stringPad.start;
+
+	var abs$3 = Math.abs;
+	var DatePrototype$1 = Date.prototype;
+	var getTime$1 = DatePrototype$1.getTime;
+	var nativeDateToISOString = DatePrototype$1.toISOString;
+
+	// `Date.prototype.toISOString` method implementation
+	// https://tc39.github.io/ecma262/#sec-date.prototype.toisostring
+	// PhantomJS / old WebKit fails here:
+	var dateToIsoString = (fails(function () {
+	  return nativeDateToISOString.call(new Date(-5e13 - 1)) != '0385-07-25T07:06:39.999Z';
+	}) || !fails(function () {
+	  nativeDateToISOString.call(new Date(NaN));
+	})) ? function toISOString() {
+	  if (!isFinite(getTime$1.call(this))) throw RangeError('Invalid time value');
+	  var date = this;
+	  var year = date.getUTCFullYear();
+	  var milliseconds = date.getUTCMilliseconds();
+	  var sign = year < 0 ? '-' : year > 9999 ? '+' : '';
+	  return sign + padStart(abs$3(year), sign ? 6 : 4, 0) +
+	    '-' + padStart(date.getUTCMonth() + 1, 2, 0) +
+	    '-' + padStart(date.getUTCDate(), 2, 0) +
+	    'T' + padStart(date.getUTCHours(), 2, 0) +
+	    ':' + padStart(date.getUTCMinutes(), 2, 0) +
+	    ':' + padStart(date.getUTCSeconds(), 2, 0) +
+	    '.' + padStart(milliseconds, 3, 0) +
+	    'Z';
+	} : nativeDateToISOString;
+
+	// `Date.prototype.toISOString` method
+	// https://tc39.github.io/ecma262/#sec-date.prototype.toisostring
+	// PhantomJS / old WebKit has a broken implementations
+	_export({ target: 'Date', proto: true, forced: Date.prototype.toISOString !== dateToIsoString }, {
+	  toISOString: dateToIsoString
+	});
 
-	SplayTree.prototype.remove = function remove (key) {
-	  var z = this.find(key);
+	function behaviorBreathe() {
+	  var duration = 800;
+	  var steps = 4;
+	  var selector = '.selected.shadow, .selected .shadow';
 
-	  if (!z) { return false; }
+	  var _selected = select(null);
 
-	  this.splay(z);
+	  var _classed = '';
+	  var _params = {};
+	  var _done = false;
 
-	  if (!z.left) { this.replace(z, z.right); }
-	  else if (!z.right) { this.replace(z, z.left); }
-	  else {
-	    var y = this.minNode(z.right);
-	    if (y.parent !== z) {
-	      this.replace(y, y.right);
-	      y.right = z.right;
-	      y.right.parent = y;
-	    }
-	    this.replace(z, y);
-	    y.left = z.left;
-	    y.left.parent = y;
+	  var _timer;
+
+	  function ratchetyInterpolator(a, b, steps, units) {
+	    a = parseFloat(a);
+	    b = parseFloat(b);
+	    var sample = quantize().domain([0, 1]).range(d3_quantize(d3_interpolateNumber(a, b), steps));
+	    return function (t) {
+	      return String(sample(t)) + (units || '');
+	    };
 	  }
 
-	  this._size--;
-	  return true;
-	};
+	  function reset(selection) {
+	    selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
+	  }
+
+	  function setAnimationParams(transition, fromTo) {
+	    var toFrom = fromTo === 'from' ? 'to' : 'from';
+	    transition.styleTween('stroke-opacity', function (d) {
+	      return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
+	    }).styleTween('stroke-width', function (d) {
+	      return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
+	    }).styleTween('fill-opacity', function (d) {
+	      return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
+	    }).styleTween('r', function (d) {
+	      return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
+	    });
+	  }
 
+	  function calcAnimationParams(selection) {
+	    selection.call(reset).each(function (d) {
+	      var s = select(this);
+	      var tag = s.node().tagName;
+	      var p = {
+	        'from': {},
+	        'to': {}
+	      };
+	      var opacity;
+	      var width; // determine base opacity and width
 
-	SplayTree.prototype.removeNode = function removeNode (z) {
-	  if (!z) { return false; }
+	      if (tag === 'circle') {
+	        opacity = parseFloat(s.style('fill-opacity') || 0.5);
+	        width = parseFloat(s.style('r') || 15.5);
+	      } else {
+	        opacity = parseFloat(s.style('stroke-opacity') || 0.7);
+	        width = parseFloat(s.style('stroke-width') || 10);
+	      } // calculate from/to interpolation params..
 
-	  this.splay(z);
 
-	  if (!z.left) { this.replace(z, z.right); }
-	  else if (!z.right) { this.replace(z, z.left); }
-	  else {
-	    var y = this.minNode(z.right);
-	    if (y.parent !== z) {
-	      this.replace(y, y.right);
-	      y.right = z.right;
-	      y.right.parent = y;
-	    }
-	    this.replace(z, y);
-	    y.left = z.left;
-	    y.left.parent = y;
+	      p.tag = tag;
+	      p.from.opacity = opacity * 0.6;
+	      p.to.opacity = opacity * 1.25;
+	      p.from.width = width * 0.7;
+	      p.to.width = width * (tag === 'circle' ? 1.5 : 1);
+	      _params[d.id] = p;
+	    });
 	  }
 
-	  this._size--;
-	  return true;
-	};
+	  function run(surface, fromTo) {
+	    var toFrom = fromTo === 'from' ? 'to' : 'from';
+	    var currSelected = surface.selectAll(selector);
+	    var currClassed = surface.attr('class');
 
+	    if (_done || currSelected.empty()) {
+	      _selected.call(reset);
 
-	SplayTree.prototype.erase = function erase (key) {
-	  var z = this.find(key);
-	  if (!z) { return; }
+	      _selected = select(null);
+	      return;
+	    }
 
-	  this.splay(z);
+	    if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
+	      _selected.call(reset);
 
-	  var s = z.left;
-	  var t = z.right;
+	      _classed = currClassed;
+	      _selected = currSelected.call(calcAnimationParams);
+	    }
 
-	  var sMax = null;
-	  if (s) {
-	    s.parent = null;
-	    sMax = this.maxNode(s);
-	    this.splay(sMax);
-	    this._root = sMax;
-	  }
-	  if (t) {
-	    if (s) { sMax.right = t; }
-	    else { this._root = t; }
-	    t.parent = sMax;
-	  }
+	    var didCallNextRun = false;
 
-	  this._size--;
-	};
+	    _selected.transition().duration(duration).call(setAnimationParams, fromTo).on('end', function () {
+	      // `end` event is called for each selected element, but we want
+	      // it to run only once
+	      if (!didCallNextRun) {
+	        surface.call(run, toFrom);
+	        didCallNextRun = true;
+	      } // if entity was deselected, remove breathe styling
 
-	/**
-	 * Removes and returns the node with smallest key
-	 * @return {?Node}
-	 */
-	SplayTree.prototype.pop = function pop () {
-	  var node = this._root, returnValue = null;
-	  if (node) {
-	    while (node.left) { node = node.left; }
-	    returnValue = { key: node.key, data: node.data };
-	    this.remove(node.key);
+
+	      if (!select(this).classed('selected')) {
+	        reset(select(this));
+	      }
+	    });
 	  }
-	  return returnValue;
-	};
 
+	  function behavior(surface) {
+	    _done = false;
+	    _timer = timer(function () {
+	      // wait for elements to actually become selected
+	      if (surface.selectAll(selector).empty()) {
+	        return false;
+	      }
 
-	/* eslint-disable class-methods-use-this */
+	      surface.call(run, 'from');
 
-	/**
-	 * Successor node
-	 * @param{Node} node
-	 * @return {?Node}
-	 */
-	SplayTree.prototype.next = function next (node) {
-	  var successor = node;
-	  if (successor) {
-	    if (successor.right) {
-	      successor = successor.right;
-	      while (successor && successor.left) { successor = successor.left; }
-	    } else {
-	      successor = node.parent;
-	      while (successor && successor.right === node) {
-	        node = successor; successor = successor.parent;
-	      }
-	    }
+	      _timer.stop();
+
+	      return true;
+	    }, 20);
 	  }
-	  return successor;
-	};
 
+	  behavior.restartIfNeeded = function (surface) {
+	    if (_selected.empty()) {
+	      surface.call(run, 'from');
 
-	/**
-	 * Predecessor node
-	 * @param{Node} node
-	 * @return {?Node}
-	 */
-	SplayTree.prototype.prev = function prev (node) {
-	  var predecessor = node;
-	  if (predecessor) {
-	    if (predecessor.left) {
-	      predecessor = predecessor.left;
-	      while (predecessor && predecessor.right) { predecessor = predecessor.right; }
-	    } else {
-	      predecessor = node.parent;
-	      while (predecessor && predecessor.left === node) {
-	        node = predecessor;
-	        predecessor = predecessor.parent;
+	      if (_timer) {
+	        _timer.stop();
 	      }
 	    }
-	  }
-	  return predecessor;
-	};
-	/* eslint-enable class-methods-use-this */
-
+	  };
 
-	/**
-	 * @param{forEachCallback} callback
-	 * @return {SplayTree}
-	 */
-	SplayTree.prototype.forEach = function forEach (callback) {
-	  var current = this._root;
-	  var s = [], done = false, i = 0;
+	  behavior.off = function () {
+	    _done = true;
 
-	  while (!done) {
-	    // Reach the left most Node of the current Node
-	    if (current) {
-	      // Place pointer to a tree node on the stack
-	      // before traversing the node's left subtree
-	      s.push(current);
-	      current = current.left;
-	    } else {
-	      // BackTrack from the empty subtree and visit the Node
-	      // at the top of the stack; however, if the stack is
-	      // empty you are done
-	      if (s.length > 0) {
-	        current = s.pop();
-	        callback(current, i++);
-
-	        // We have visited the node and its left
-	        // subtree. Now, it's right subtree's turn
-	        current = current.right;
-	      } else { done = true; }
+	    if (_timer) {
+	      _timer.stop();
 	    }
-	  }
-	  return this;
-	};
 
+	    _selected.interrupt().call(reset);
+	  };
 
-	/**
-	 * Walk key range from `low` to `high`. Stops if `fn` returns a value.
-	 * @param{Key}    low
-	 * @param{Key}    high
-	 * @param{Function} fn
-	 * @param{*?}     ctx
-	 * @return {SplayTree}
-	 */
-	SplayTree.prototype.range = function range (low, high, fn, ctx) {
-	  var Q = [];
-	  var compare = this._compare;
-	  var node = this._root, cmp;
+	  return behavior;
+	}
 
-	  while (Q.length !== 0 || node) {
-	    if (node) {
-	      Q.push(node);
-	      node = node.left;
+	/* Creates a keybinding behavior for an operation */
+	function behaviorOperation(context) {
+	  var _operation;
+
+	  function keypress(d3_event) {
+	    // prevent operations during low zoom selection
+	    if (!context.map().withinEditableZoom()) return;
+	    if (_operation.availableForKeypress && !_operation.availableForKeypress()) return;
+	    d3_event.preventDefault();
+
+	    var disabled = _operation.disabled();
+
+	    if (disabled) {
+	      context.ui().flash.duration(4000).iconName('#iD-operation-' + _operation.id).iconClass('operation disabled').label(_operation.tooltip)();
 	    } else {
-	      node = Q.pop();
-	      cmp = compare(node.key, high);
-	      if (cmp > 0) {
-	        break;
-	      } else if (compare(node.key, low) >= 0) {
-	        if (fn.call(ctx, node)) { return this; } // stop if smth is returned
-	      }
-	      node = node.right;
+	      context.ui().flash.duration(2000).iconName('#iD-operation-' + _operation.id).iconClass('operation').label(_operation.annotation() || _operation.title)();
+	      if (_operation.point) _operation.point(null);
+
+	      _operation();
 	    }
 	  }
-	  return this;
-	};
-
-	/**
-	 * Returns all keys in order
-	 * @return {Array<Key>}
-	 */
-	SplayTree.prototype.keys = function keys () {
-	  var current = this._root;
-	  var s = [], r = [], done = false;
 
-	  while (!done) {
-	    if (current) {
-	      s.push(current);
-	      current = current.left;
-	    } else {
-	      if (s.length > 0) {
-	        current = s.pop();
-	        r.push(current.key);
-	        current = current.right;
-	      } else { done = true; }
+	  function behavior() {
+	    if (_operation && _operation.available()) {
+	      context.keybinding().on(_operation.keys, keypress);
 	    }
+
+	    return behavior;
 	  }
-	  return r;
-	};
 
+	  behavior.off = function () {
+	    context.keybinding().off(_operation.keys);
+	  };
 
-	/**
-	 * Returns `data` fields of all nodes in order.
-	 * @return {Array<Value>}
-	 */
-	SplayTree.prototype.values = function values () {
-	  var current = this._root;
-	  var s = [], r = [], done = false;
+	  behavior.which = function (_) {
+	    if (!arguments.length) return _operation;
+	    _operation = _;
+	    return behavior;
+	  };
 
-	  while (!done) {
-	    if (current) {
-	      s.push(current);
-	      current = current.left;
-	    } else {
-	      if (s.length > 0) {
-	        current = s.pop();
-	        r.push(current.data);
-	        current = current.right;
-	      } else { done = true; }
-	    }
-	  }
-	  return r;
-	};
+	  return behavior;
+	}
 
+	function operationCircularize(context, selectedIDs) {
+	  var _extent;
 
-	/**
-	 * Returns node at given index
-	 * @param{number} index
-	 * @return {?Node}
-	 */
-	SplayTree.prototype.at = function at (index) {
-	  // removed after a consideration, more misleading than useful
-	  // index = index % this.size;
-	  // if (index < 0) index = this.size - index;
+	  var _actions = selectedIDs.map(getAction).filter(Boolean);
 
-	  var current = this._root;
-	  var s = [], done = false, i = 0;
+	  var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-	  while (!done) {
-	    if (current) {
-	      s.push(current);
-	      current = current.left;
+	  var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+	    return n.loc;
+	  });
+
+	  function getAction(entityID) {
+	    var entity = context.entity(entityID);
+	    if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) return null;
+
+	    if (!_extent) {
+	      _extent = entity.extent(context.graph());
 	    } else {
-	      if (s.length > 0) {
-	        current = s.pop();
-	        if (i === index) { return current; }
-	        i++;
-	        current = current.right;
-	      } else { done = true; }
+	      _extent = _extent.extend(entity.extent(context.graph()));
 	    }
+
+	    return actionCircularize(entityID, context.projection);
 	  }
-	  return null;
-	};
 
-	/**
-	 * Bulk-load items. Both array have to be same size
-	 * @param{Array<Key>}  keys
-	 * @param{Array<Value>}[values]
-	 * @param{Boolean}     [presort=false] Pre-sort keys and values, using
-	 *                                       tree's comparator. Sorting is done
-	 *                                       in-place
-	 * @return {AVLTree}
-	 */
-	SplayTree.prototype.load = function load (keys, values, presort) {
-	    if ( keys === void 0 ) keys = [];
-	    if ( values === void 0 ) values = [];
-	    if ( presort === void 0 ) presort = false;
-
-	  if (this._size !== 0) { throw new Error('bulk-load: tree is not empty'); }
-	  var size = keys.length;
-	  if (presort) { sort(keys, values, 0, size - 1, this._compare); }
-	  this._root = loadRecursive(null, keys, values, 0, size);
-	  this._size = size;
-	  return this;
-	};
+	  var operation = function operation() {
+	    if (!_actions.length) return;
 
+	    var combinedAction = function combinedAction(graph, t) {
+	      _actions.forEach(function (action) {
+	        if (!action.disabled(graph)) {
+	          graph = action(graph, t);
+	        }
+	      });
 
-	SplayTree.prototype.min = function min () {
-	  var node = this.minNode(this._root);
-	  if (node) { return node.key; }
-	  else    { return null; }
-	};
+	      return graph;
+	    };
 
+	    combinedAction.transitionable = true;
+	    context.perform(combinedAction, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  };
 
-	SplayTree.prototype.max = function max () {
-	  var node = this.maxNode(this._root);
-	  if (node) { return node.key; }
-	  else    { return null; }
-	};
+	  operation.available = function () {
+	    return _actions.length && selectedIDs.length === _actions.length;
+	  }; // don't cache this because the visible extent could change
 
-	SplayTree.prototype.isEmpty = function isEmpty () { return this._root === null; };
-	prototypeAccessors.size.get = function () { return this._size; };
 
+	  operation.disabled = function () {
+	    if (!_actions.length) return '';
 
-	/**
-	 * Create a tree and load it with items
-	 * @param{Array<Key>}        keys
-	 * @param{Array<Value>?}      [values]
-
-	 * @param{Function?}          [comparator]
-	 * @param{Boolean?}           [presort=false] Pre-sort keys and values, using
-	 *                                             tree's comparator. Sorting is done
-	 *                                             in-place
-	 * @param{Boolean?}           [noDuplicates=false] Allow duplicates
-	 * @return {SplayTree}
-	 */
-	SplayTree.createTree = function createTree (keys, values, comparator, presort, noDuplicates) {
-	  return new SplayTree(comparator, noDuplicates).load(keys, values, presort);
-	};
+	    var actionDisableds = _actions.map(function (action) {
+	      return action.disabled(context.graph());
+	    }).filter(Boolean);
 
-	Object.defineProperties( SplayTree.prototype, prototypeAccessors );
+	    if (actionDisableds.length === _actions.length) {
+	      // none of the features can be circularized
+	      if (new Set(actionDisableds).size > 1) {
+	        return 'multiple_blockers';
+	      }
 
+	      return actionDisableds[0];
+	    } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
 
-	function loadRecursive (parent, keys, values, start, end) {
-	  var size = end - start;
-	  if (size > 0) {
-	    var middle = start + Math.floor(size / 2);
-	    var key    = keys[middle];
-	    var data   = values[middle];
-	    var node   = { key: key, data: data, parent: parent };
-	    node.left    = loadRecursive(node, keys, values, start, middle);
-	    node.right   = loadRecursive(node, keys, values, middle + 1, end);
-	    return node;
-	  }
-	  return null;
-	}
+	    return false;
 
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	function sort(keys, values, left, right, compare) {
-	  if (left >= right) { return; }
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	  var pivot = keys[(left + right) >> 1];
-	  var i = left - 1;
-	  var j = right + 1;
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	  while (true) {
-	    do { i++; } while (compare(keys[i], pivot) < 0);
-	    do { j--; } while (compare(keys[j], pivot) > 0);
-	    if (i >= j) { break; }
+	      return false;
+	    }
+	  };
 
-	    var tmp = keys[i];
-	    keys[i] = keys[j];
-	    keys[j] = tmp;
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
+	  };
 
-	    tmp = values[i];
-	    values[i] = values[j];
-	    values[j] = tmp;
-	  }
+	  operation.annotation = function () {
+	    return _t('operations.circularize.annotation.feature', {
+	      n: _actions.length
+	    });
+	  };
 
-	  sort(keys, values,  left,     j, compare);
-	  sort(keys, values, j + 1, right, compare);
+	  operation.id = 'circularize';
+	  operation.keys = [_t('operations.circularize.key')];
+	  operation.title = _t('operations.circularize.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	var NORMAL               = 0;
-	var NON_CONTRIBUTING     = 1;
-	var SAME_TRANSITION      = 2;
-	var DIFFERENT_TRANSITION = 3;
+	// For example, ⌘Z -> Ctrl+Z
 
-	var INTERSECTION = 0;
-	var UNION        = 1;
-	var DIFFERENCE   = 2;
-	var XOR          = 3;
+	var uiCmd = function uiCmd(code) {
+	  var detected = utilDetect();
 
-	/**
-	 * @param  {SweepEvent} event
-	 * @param  {SweepEvent} prev
-	 * @param  {Operation} operation
-	 */
-	function computeFields (event, prev, operation) {
-	  // compute inOut and otherInOut fields
-	  if (prev === null) {
-	    event.inOut      = false;
-	    event.otherInOut = true;
+	  if (detected.os === 'mac') {
+	    return code;
+	  }
+
+	  if (detected.os === 'win') {
+	    if (code === '⌘⇧Z') return 'Ctrl+Y';
+	  }
+
+	  var result = '',
+	      replacements = {
+	    '⌘': 'Ctrl',
+	    '⇧': 'Shift',
+	    '⌥': 'Alt',
+	    '⌫': 'Backspace',
+	    '⌦': 'Delete'
+	  };
+
+	  for (var i = 0; i < code.length; i++) {
+	    if (code[i] in replacements) {
+	      result += replacements[code[i]] + (i < code.length - 1 ? '+' : '');
+	    } else {
+	      result += code[i];
+	    }
+	  }
+
+	  return result;
+	}; // return a display-focused string for a given keyboard code
+
+	uiCmd.display = function (code) {
+	  if (code.length !== 1) return code;
+	  var detected = utilDetect();
+	  var mac = detected.os === 'mac';
+	  var replacements = {
+	    '⌘': mac ? '⌘ ' + _t('shortcuts.key.cmd') : _t('shortcuts.key.ctrl'),
+	    '⇧': mac ? '⇧ ' + _t('shortcuts.key.shift') : _t('shortcuts.key.shift'),
+	    '⌥': mac ? '⌥ ' + _t('shortcuts.key.option') : _t('shortcuts.key.alt'),
+	    '⌃': mac ? '⌃ ' + _t('shortcuts.key.ctrl') : _t('shortcuts.key.ctrl'),
+	    '⌫': mac ? '⌫ ' + _t('shortcuts.key.delete') : _t('shortcuts.key.backspace'),
+	    '⌦': mac ? '⌦ ' + _t('shortcuts.key.del') : _t('shortcuts.key.del'),
+	    '↖': mac ? '↖ ' + _t('shortcuts.key.pgup') : _t('shortcuts.key.pgup'),
+	    '↘': mac ? '↘ ' + _t('shortcuts.key.pgdn') : _t('shortcuts.key.pgdn'),
+	    '⇞': mac ? '⇞ ' + _t('shortcuts.key.home') : _t('shortcuts.key.home'),
+	    '⇟': mac ? '⇟ ' + _t('shortcuts.key.end') : _t('shortcuts.key.end'),
+	    '↵': mac ? '⏎ ' + _t('shortcuts.key.return') : _t('shortcuts.key.enter'),
+	    '⎋': mac ? '⎋ ' + _t('shortcuts.key.esc') : _t('shortcuts.key.esc'),
+	    '☰': mac ? '☰ ' + _t('shortcuts.key.menu') : _t('shortcuts.key.menu')
+	  };
+	  return replacements[code] || code;
+	};
+
+	function operationDelete(context, selectedIDs) {
+	  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  var action = actionDeleteMultiple(selectedIDs);
+	  var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  var coords = nodes.map(function (n) {
+	    return n.loc;
+	  });
+	  var extent = utilTotalExtent(selectedIDs, context.graph());
+
+	  var operation = function operation() {
+	    var nextSelectedID;
+	    var nextSelectedLoc;
+
+	    if (selectedIDs.length === 1) {
+	      var id = selectedIDs[0];
+	      var entity = context.entity(id);
+	      var geometry = entity.geometry(context.graph());
+	      var parents = context.graph().parentWays(entity);
+	      var parent = parents[0]; // Select the next closest node in the way.
+
+	      if (geometry === 'vertex') {
+	        var nodes = parent.nodes;
+	        var i = nodes.indexOf(id);
+
+	        if (i === 0) {
+	          i++;
+	        } else if (i === nodes.length - 1) {
+	          i--;
+	        } else {
+	          var a = geoSphericalDistance(entity.loc, context.entity(nodes[i - 1]).loc);
+	          var b = geoSphericalDistance(entity.loc, context.entity(nodes[i + 1]).loc);
+	          i = a < b ? i - 1 : i + 1;
+	        }
 
-	  // previous line segment in sweepline belongs to the same polygon
-	  } else {
-	    if (event.isSubject === prev.isSubject) {
-	      event.inOut      = !prev.inOut;
-	      event.otherInOut = prev.otherInOut;
+	        nextSelectedID = nodes[i];
+	        nextSelectedLoc = context.entity(nextSelectedID).loc;
+	      }
+	    }
 
-	    // previous line segment in sweepline belongs to the clipping polygon
+	    context.perform(action, operation.annotation());
+	    context.validator().validate();
+
+	    if (nextSelectedID && nextSelectedLoc) {
+	      if (context.hasEntity(nextSelectedID)) {
+	        context.enter(modeSelect(context, [nextSelectedID]).follow(true));
+	      } else {
+	        context.map().centerEase(nextSelectedLoc);
+	        context.enter(modeBrowse(context));
+	      }
 	    } else {
-	      event.inOut      = !prev.otherInOut;
-	      event.otherInOut = prev.isVertical() ? !prev.inOut : prev.inOut;
+	      context.enter(modeBrowse(context));
 	    }
+	  };
 
-	    // compute prevInResult field
-	    if (prev) {
-	      event.prevInResult = (!inResult(prev, operation) || prev.isVertical())
-	        ? prev.prevInResult : prev;
+	  operation.available = function () {
+	    return true;
+	  };
+
+	  operation.disabled = function () {
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    } else if (selectedIDs.some(protectedMember)) {
+	      return 'part_of_relation';
+	    } else if (selectedIDs.some(incompleteRelation)) {
+	      return 'incomplete_relation';
+	    } else if (selectedIDs.some(hasWikidataTag)) {
+	      return 'has_wikidata_tag';
 	    }
-	  }
 
-	  // check if the line segment belongs to the Boolean operation
-	  var isInResult = inResult(event, operation);
-	  if (isInResult) {
-	    event.resultTransition = determineResultTransition(event, operation);
-	  } else {
-	    event.resultTransition = 0;
-	  }
-	}
+	    return false;
 
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	/* eslint-disable indent */
-	function inResult(event, operation) {
-	  switch (event.type) {
-	    case NORMAL:
-	      switch (operation) {
-	        case INTERSECTION:
-	          return !event.otherInOut;
-	        case UNION:
-	          return event.otherInOut;
-	        case DIFFERENCE:
-	          // return (event.isSubject && !event.otherInOut) ||
-	          //         (!event.isSubject && event.otherInOut);
-	          return (event.isSubject && event.otherInOut) ||
-	                  (!event.isSubject && !event.otherInOut);
-	        case XOR:
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
+
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
 	          return true;
+	        }
 	      }
-	      break;
-	    case SAME_TRANSITION:
-	      return operation === INTERSECTION || operation === UNION;
-	    case DIFFERENT_TRANSITION:
-	      return operation === DIFFERENCE;
-	    case NON_CONTRIBUTING:
+
 	      return false;
-	  }
-	  return false;
-	}
-	/* eslint-enable indent */
+	    }
 
+	    function hasWikidataTag(id) {
+	      var entity = context.entity(id);
+	      return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+	    }
 
-	function determineResultTransition(event, operation) {
-	  var thisIn = !event.inOut;
-	  var thatIn = !event.otherInOut;
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
 
-	  var isIn;
-	  switch (operation) {
-	    case INTERSECTION:
-	      isIn = thisIn && thatIn; break;
-	    case UNION:
-	      isIn = thisIn || thatIn; break;
-	    case XOR:
-	      isIn = thisIn ^ thatIn; break;
-	    case DIFFERENCE:
-	      if (event.isSubject) {
-	        isIn = thisIn && !thatIn;
-	      } else {
-	        isIn = thatIn && !thisIn;
+	    function protectedMember(id) {
+	      var entity = context.entity(id);
+	      if (entity.type !== 'way') return false;
+	      var parents = context.graph().parentRelations(entity);
+
+	      for (var i = 0; i < parents.length; i++) {
+	        var parent = parents[i];
+	        var type = parent.tags.type;
+	        var role = parent.memberById(id).role || 'outer';
+
+	        if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
+	          return true;
+	        }
 	      }
-	      break;
-	  }
-	  return isIn ? +1 : -1;
-	}
 
-	var SweepEvent = function SweepEvent (point, left, otherEvent, isSubject, edgeType) {
+	      return false;
+	    }
+	  };
 
-	  /**
-	   * Is left endpoint?
-	   * @type {Boolean}
-	   */
-	  this.left = left;
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
+	  };
 
-	  /**
-	   * @type {Array.<Number>}
-	   */
-	  this.point = point;
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.delete.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	  /**
-	   * Other edge reference
-	   * @type {SweepEvent}
-	   */
-	  this.otherEvent = otherEvent;
+	  operation.id = 'delete';
+	  operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
+	  operation.title = _t('operations.delete.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	  /**
-	   * Belongs to source or clipping polygon
-	   * @type {Boolean}
-	   */
-	  this.isSubject = isSubject;
+	function operationOrthogonalize(context, selectedIDs) {
+	  var _extent;
 
-	  /**
-	   * Edge contribution type
-	   * @type {Number}
-	   */
-	  this.type = edgeType || NORMAL;
+	  var _type;
 
+	  var _actions = selectedIDs.map(chooseAction).filter(Boolean);
 
-	  /**
-	   * In-out transition for the sweepline crossing polygon
-	   * @type {Boolean}
-	   */
-	  this.inOut = false;
+	  var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
+	  var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+	    return n.loc;
+	  });
 
-	  /**
-	   * @type {Boolean}
-	   */
-	  this.otherInOut = false;
+	  function chooseAction(entityID) {
+	    var entity = context.entity(entityID);
+	    var geometry = entity.geometry(context.graph());
 
-	  /**
-	   * Previous event in result?
-	   * @type {SweepEvent}
-	   */
-	  this.prevInResult = null;
+	    if (!_extent) {
+	      _extent = entity.extent(context.graph());
+	    } else {
+	      _extent = _extent.extend(entity.extent(context.graph()));
+	    } // square a line/area
 
-	  /**
-	   * Type of result transition (0 = not in result, +1 = out-in, -1, in-out)
-	   * @type {Number}
-	   */
-	  this.resultTransition = 0;
 
-	  // connection step
+	    if (entity.type === 'way' && new Set(entity.nodes).size > 2) {
+	      if (_type && _type !== 'feature') return null;
+	      _type = 'feature';
+	      return actionOrthogonalize(entityID, context.projection); // square a single vertex
+	    } else if (geometry === 'vertex') {
+	      if (_type && _type !== 'corner') return null;
+	      _type = 'corner';
+	      var graph = context.graph();
+	      var parents = graph.parentWays(entity);
 
-	  /**
-	   * @type {Number}
-	   */
-	  this.otherPos = -1;
+	      if (parents.length === 1) {
+	        var way = parents[0];
 
-	  /**
-	   * @type {Number}
-	   */
-	  this.outputContourId = -1;
+	        if (way.nodes.indexOf(entityID) !== -1) {
+	          return actionOrthogonalize(way.id, context.projection, entityID);
+	        }
+	      }
+	    }
 
-	  this.isExteriorRing = true; // TODO: Looks unused, remove?
-	};
+	    return null;
+	  }
 
-	var prototypeAccessors$1 = { inResult: { configurable: true } };
+	  var operation = function operation() {
+	    if (!_actions.length) return;
 
+	    var combinedAction = function combinedAction(graph, t) {
+	      _actions.forEach(function (action) {
+	        if (!action.disabled(graph)) {
+	          graph = action(graph, t);
+	        }
+	      });
 
-	/**
-	 * @param{Array.<Number>}p
-	 * @return {Boolean}
-	 */
-	SweepEvent.prototype.isBelow = function isBelow (p) {
-	  var p0 = this.point, p1 = this.otherEvent.point;
-	  return this.left
-	    ? (p0[0] - p[0]) * (p1[1] - p[1]) - (p1[0] - p[0]) * (p0[1] - p[1]) > 0
-	    // signedArea(this.point, this.otherEvent.point, p) > 0 :
-	    : (p1[0] - p[0]) * (p0[1] - p[1]) - (p0[0] - p[0]) * (p1[1] - p[1]) > 0;
-	    //signedArea(this.otherEvent.point, this.point, p) > 0;
-	};
+	      return graph;
+	    };
 
+	    combinedAction.transitionable = true;
+	    context.perform(combinedAction, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  };
 
-	/**
-	 * @param{Array.<Number>}p
-	 * @return {Boolean}
-	 */
-	SweepEvent.prototype.isAbove = function isAbove (p) {
-	  return !this.isBelow(p);
-	};
+	  operation.available = function () {
+	    return _actions.length && selectedIDs.length === _actions.length;
+	  }; // don't cache this because the visible extent could change
 
 
-	/**
-	 * @return {Boolean}
-	 */
-	SweepEvent.prototype.isVertical = function isVertical () {
-	  return this.point[0] === this.otherEvent.point[0];
-	};
+	  operation.disabled = function () {
+	    if (!_actions.length) return '';
 
+	    var actionDisableds = _actions.map(function (action) {
+	      return action.disabled(context.graph());
+	    }).filter(Boolean);
 
-	/**
-	 * Does event belong to result?
-	 * @return {Boolean}
-	 */
-	prototypeAccessors$1.inResult.get = function () {
-	  return this.resultTransition !== 0;
-	};
+	    if (actionDisableds.length === _actions.length) {
+	      // none of the features can be squared
+	      if (new Set(actionDisableds).size > 1) {
+	        return 'multiple_blockers';
+	      }
 
+	      return actionDisableds[0];
+	    } else if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
 
-	SweepEvent.prototype.clone = function clone () {
-	  var copy = new SweepEvent(
-	    this.point, this.left, this.otherEvent, this.isSubject, this.type);
+	    return false;
 
-	  copy.contourId      = this.contourId;
-	  copy.resultTransition = this.resultTransition;
-	  copy.prevInResult   = this.prevInResult;
-	  copy.isExteriorRing = this.isExteriorRing;
-	  copy.inOut          = this.inOut;
-	  copy.otherInOut     = this.otherInOut;
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	  return copy;
-	};
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	Object.defineProperties( SweepEvent.prototype, prototypeAccessors$1 );
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	function equals(p1, p2) {
-	  if (p1[0] === p2[0]) {
-	    if (p1[1] === p2[1]) {
-	      return true;
-	    } else {
 	      return false;
 	    }
-	  }
-	  return false;
-	}
+	  };
 
-	// const EPSILON = 1e-9;
-	// const abs = Math.abs;
-	// TODO https://github.com/w8r/martinez/issues/6#issuecomment-262847164
-	// Precision problem.
-	//
-	// module.exports = function equals(p1, p2) {
-	//   return abs(p1[0] - p2[0]) <= EPSILON && abs(p1[1] - p2[1]) <= EPSILON;
-	// };
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
+	  };
 
-	var epsilon$1 = 1.1102230246251565e-16;
-	var splitter = 134217729;
-	var resulterrbound = (3 + 8 * epsilon$1) * epsilon$1;
-
-	// fast_expansion_sum_zeroelim routine from oritinal code
-	function sum$1(elen, e, flen, f, h) {
-	    var Q, Qnew, hh, bvirt;
-	    var enow = e[0];
-	    var fnow = f[0];
-	    var eindex = 0;
-	    var findex = 0;
-	    if ((fnow > enow) === (fnow > -enow)) {
-	        Q = enow;
-	        enow = e[++eindex];
-	    } else {
-	        Q = fnow;
-	        fnow = f[++findex];
-	    }
-	    var hindex = 0;
-	    if (eindex < elen && findex < flen) {
-	        if ((fnow > enow) === (fnow > -enow)) {
-	            Qnew = enow + Q;
-	            hh = Q - (Qnew - enow);
-	            enow = e[++eindex];
-	        } else {
-	            Qnew = fnow + Q;
-	            hh = Q - (Qnew - fnow);
-	            fnow = f[++findex];
-	        }
-	        Q = Qnew;
-	        if (hh !== 0) {
-	            h[hindex++] = hh;
-	        }
-	        while (eindex < elen && findex < flen) {
-	            if ((fnow > enow) === (fnow > -enow)) {
-	                Qnew = Q + enow;
-	                bvirt = Qnew - Q;
-	                hh = Q - (Qnew - bvirt) + (enow - bvirt);
-	                enow = e[++eindex];
-	            } else {
-	                Qnew = Q + fnow;
-	                bvirt = Qnew - Q;
-	                hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-	                fnow = f[++findex];
-	            }
-	            Q = Qnew;
-	            if (hh !== 0) {
-	                h[hindex++] = hh;
-	            }
-	        }
-	    }
-	    while (eindex < elen) {
-	        Qnew = Q + enow;
-	        bvirt = Qnew - Q;
-	        hh = Q - (Qnew - bvirt) + (enow - bvirt);
-	        enow = e[++eindex];
-	        Q = Qnew;
-	        if (hh !== 0) {
-	            h[hindex++] = hh;
-	        }
-	    }
-	    while (findex < flen) {
-	        Qnew = Q + fnow;
-	        bvirt = Qnew - Q;
-	        hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-	        fnow = f[++findex];
-	        Q = Qnew;
-	        if (hh !== 0) {
-	            h[hindex++] = hh;
-	        }
-	    }
-	    if (Q !== 0 || hindex === 0) {
-	        h[hindex++] = Q;
-	    }
-	    return hindex;
-	}
+	  operation.annotation = function () {
+	    return _t('operations.orthogonalize.annotation.' + _type, {
+	      n: _actions.length
+	    });
+	  };
 
-	function estimate(elen, e) {
-	    var Q = e[0];
-	    for (var i = 1; i < elen; i++) { Q += e[i]; }
-	    return Q;
+	  operation.id = 'orthogonalize';
+	  operation.keys = [_t('operations.orthogonalize.key')];
+	  operation.title = _t('operations.orthogonalize.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	function vec(n) {
-	    return new Float64Array(n);
+	function operationReflectShort(context, selectedIDs) {
+	  return operationReflect(context, selectedIDs, 'short');
+	}
+	function operationReflectLong(context, selectedIDs) {
+	  return operationReflect(context, selectedIDs, 'long');
 	}
+	function operationReflect(context, selectedIDs, axis) {
+	  axis = axis || 'long';
+	  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  var coords = nodes.map(function (n) {
+	    return n.loc;
+	  });
+	  var extent = utilTotalExtent(selectedIDs, context.graph());
 
-	var ccwerrboundA = (3 + 16 * epsilon$1) * epsilon$1;
-	var ccwerrboundB = (2 + 12 * epsilon$1) * epsilon$1;
-	var ccwerrboundC = (9 + 64 * epsilon$1) * epsilon$1 * epsilon$1;
+	  var operation = function operation() {
+	    var action = actionReflect(selectedIDs, context.projection).useLongAxis(Boolean(axis === 'long'));
+	    context.perform(action, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  };
 
-	var B = vec(4);
-	var C1 = vec(8);
-	var C2 = vec(12);
-	var D = vec(16);
-	var u = vec(4);
+	  operation.available = function () {
+	    return nodes.length >= 3;
+	  }; // don't cache this because the visible extent could change
 
-	function orient2dadapt(ax, ay, bx, by, cx, cy, detsum) {
-	    var acxtail, acytail, bcxtail, bcytail;
-	    var bvirt, c, ahi, alo, bhi, blo, _i, _j, _0, s1, s0, t1, t0, u3;
-
-	    var acx = ax - cx;
-	    var bcx = bx - cx;
-	    var acy = ay - cy;
-	    var bcy = by - cy;
-
-	    s1 = acx * bcy;
-	    c = splitter * acx;
-	    ahi = c - (c - acx);
-	    alo = acx - ahi;
-	    c = splitter * bcy;
-	    bhi = c - (c - bcy);
-	    blo = bcy - bhi;
-	    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-	    t1 = acy * bcx;
-	    c = splitter * acy;
-	    ahi = c - (c - acy);
-	    alo = acy - ahi;
-	    c = splitter * bcx;
-	    bhi = c - (c - bcx);
-	    blo = bcx - bhi;
-	    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-	    _i = s0 - t0;
-	    bvirt = s0 - _i;
-	    B[0] = s0 - (_i + bvirt) + (bvirt - t0);
-	    _j = s1 + _i;
-	    bvirt = _j - s1;
-	    _0 = s1 - (_j - bvirt) + (_i - bvirt);
-	    _i = _0 - t1;
-	    bvirt = _0 - _i;
-	    B[1] = _0 - (_i + bvirt) + (bvirt - t1);
-	    u3 = _j + _i;
-	    bvirt = u3 - _j;
-	    B[2] = _j - (u3 - bvirt) + (_i - bvirt);
-	    B[3] = u3;
-
-	    var det = estimate(4, B);
-	    var errbound = ccwerrboundB * detsum;
-	    if (det >= errbound || -det >= errbound) {
-	        return det;
-	    }
-
-	    bvirt = ax - acx;
-	    acxtail = ax - (acx + bvirt) + (bvirt - cx);
-	    bvirt = bx - bcx;
-	    bcxtail = bx - (bcx + bvirt) + (bvirt - cx);
-	    bvirt = ay - acy;
-	    acytail = ay - (acy + bvirt) + (bvirt - cy);
-	    bvirt = by - bcy;
-	    bcytail = by - (bcy + bvirt) + (bvirt - cy);
-
-	    if (acxtail === 0 && acytail === 0 && bcxtail === 0 && bcytail === 0) {
-	        return det;
-	    }
-
-	    errbound = ccwerrboundC * detsum + resulterrbound * Math.abs(det);
-	    det += (acx * bcytail + bcy * acxtail) - (acy * bcxtail + bcx * acytail);
-	    if (det >= errbound || -det >= errbound) { return det; }
-
-	    s1 = acxtail * bcy;
-	    c = splitter * acxtail;
-	    ahi = c - (c - acxtail);
-	    alo = acxtail - ahi;
-	    c = splitter * bcy;
-	    bhi = c - (c - bcy);
-	    blo = bcy - bhi;
-	    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-	    t1 = acytail * bcx;
-	    c = splitter * acytail;
-	    ahi = c - (c - acytail);
-	    alo = acytail - ahi;
-	    c = splitter * bcx;
-	    bhi = c - (c - bcx);
-	    blo = bcx - bhi;
-	    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-	    _i = s0 - t0;
-	    bvirt = s0 - _i;
-	    u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-	    _j = s1 + _i;
-	    bvirt = _j - s1;
-	    _0 = s1 - (_j - bvirt) + (_i - bvirt);
-	    _i = _0 - t1;
-	    bvirt = _0 - _i;
-	    u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-	    u3 = _j + _i;
-	    bvirt = u3 - _j;
-	    u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-	    u[3] = u3;
-	    var C1len = sum$1(4, B, 4, u, C1);
-
-	    s1 = acx * bcytail;
-	    c = splitter * acx;
-	    ahi = c - (c - acx);
-	    alo = acx - ahi;
-	    c = splitter * bcytail;
-	    bhi = c - (c - bcytail);
-	    blo = bcytail - bhi;
-	    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-	    t1 = acy * bcxtail;
-	    c = splitter * acy;
-	    ahi = c - (c - acy);
-	    alo = acy - ahi;
-	    c = splitter * bcxtail;
-	    bhi = c - (c - bcxtail);
-	    blo = bcxtail - bhi;
-	    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-	    _i = s0 - t0;
-	    bvirt = s0 - _i;
-	    u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-	    _j = s1 + _i;
-	    bvirt = _j - s1;
-	    _0 = s1 - (_j - bvirt) + (_i - bvirt);
-	    _i = _0 - t1;
-	    bvirt = _0 - _i;
-	    u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-	    u3 = _j + _i;
-	    bvirt = u3 - _j;
-	    u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-	    u[3] = u3;
-	    var C2len = sum$1(C1len, C1, 4, u, C2);
-
-	    s1 = acxtail * bcytail;
-	    c = splitter * acxtail;
-	    ahi = c - (c - acxtail);
-	    alo = acxtail - ahi;
-	    c = splitter * bcytail;
-	    bhi = c - (c - bcytail);
-	    blo = bcytail - bhi;
-	    s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-	    t1 = acytail * bcxtail;
-	    c = splitter * acytail;
-	    ahi = c - (c - acytail);
-	    alo = acytail - ahi;
-	    c = splitter * bcxtail;
-	    bhi = c - (c - bcxtail);
-	    blo = bcxtail - bhi;
-	    t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-	    _i = s0 - t0;
-	    bvirt = s0 - _i;
-	    u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-	    _j = s1 + _i;
-	    bvirt = _j - s1;
-	    _0 = s1 - (_j - bvirt) + (_i - bvirt);
-	    _i = _0 - t1;
-	    bvirt = _0 - _i;
-	    u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-	    u3 = _j + _i;
-	    bvirt = u3 - _j;
-	    u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-	    u[3] = u3;
-	    var Dlen = sum$1(C2len, C2, 4, u, D);
-
-	    return D[Dlen - 1];
-	}
 
-	function orient2d(ax, ay, bx, by, cx, cy) {
-	    var detleft = (ay - cy) * (bx - cx);
-	    var detright = (ax - cx) * (by - cy);
-	    var det = detleft - detright;
+	  operation.disabled = function () {
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    } else if (selectedIDs.some(incompleteRelation)) {
+	      return 'incomplete_relation';
+	    }
 
-	    if (detleft === 0 || detright === 0 || (detleft > 0) !== (detright > 0)) { return det; }
+	    return false;
 
-	    var detsum = Math.abs(detleft + detright);
-	    if (Math.abs(det) >= ccwerrboundA * detsum) { return det; }
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	    return -orient2dadapt(ax, ay, bx, by, cx, cy, detsum);
-	}
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	/**
-	 * Signed area of the triangle (p0, p1, p2)
-	 * @param  {Array.<Number>} p0
-	 * @param  {Array.<Number>} p1
-	 * @param  {Array.<Number>} p2
-	 * @return {Number}
-	 */
-	function signedArea(p0, p1, p2) {
-	  var res = orient2d(p0[0], p0[1], p1[0], p1[1], p2[0], p2[1]);
-	  if (res > 0) { return -1; }
-	  if (res < 0) { return 1; }
-	  return 0;
-	}
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	/**
-	 * @param  {SweepEvent} e1
-	 * @param  {SweepEvent} e2
-	 * @return {Number}
-	 */
-	function compareEvents(e1, e2) {
-	  var p1 = e1.point;
-	  var p2 = e2.point;
+	      return false;
+	    }
 
-	  // Different x-coordinate
-	  if (p1[0] > p2[0]) { return 1; }
-	  if (p1[0] < p2[0]) { return -1; }
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
+	  };
 
-	  // Different points, but same x-coordinate
-	  // Event with lower y-coordinate is processed first
-	  if (p1[1] !== p2[1]) { return p1[1] > p2[1] ? 1 : -1; }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.reflect.' + disable + '.' + multi) : _t('operations.reflect.description.' + axis + '.' + multi);
+	  };
 
-	  return specialCases(e1, e2, p1);
+	  operation.annotation = function () {
+	    return _t('operations.reflect.annotation.' + axis + '.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
+
+	  operation.id = 'reflect-' + axis;
+	  operation.keys = [_t('operations.reflect.key.' + axis)];
+	  operation.title = _t('operations.reflect.title.' + axis);
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
+	function operationMove(context, selectedIDs) {
+	  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  var coords = nodes.map(function (n) {
+	    return n.loc;
+	  });
+	  var extent = utilTotalExtent(selectedIDs, context.graph());
 
-	/* eslint-disable no-unused-vars */
-	function specialCases(e1, e2, p1, p2) {
-	  // Same coordinates, but one is a left endpoint and the other is
-	  // a right endpoint. The right endpoint is processed first
-	  if (e1.left !== e2.left)
-	    { return e1.left ? 1 : -1; }
+	  var operation = function operation() {
+	    context.enter(modeMove(context, selectedIDs));
+	  };
 
-	  // const p2 = e1.otherEvent.point, p3 = e2.otherEvent.point;
-	  // const sa = (p1[0] - p3[0]) * (p2[1] - p3[1]) - (p2[0] - p3[0]) * (p1[1] - p3[1])
-	  // Same coordinates, both events
-	  // are left endpoints or right endpoints.
-	  // not collinear
-	  if (signedArea(p1, e1.otherEvent.point, e2.otherEvent.point) !== 0) {
-	    // the event associate to the bottom segment is processed first
-	    return (!e1.isBelow(e2.otherEvent.point)) ? 1 : -1;
-	  }
+	  operation.available = function () {
+	    return selectedIDs.length > 1 || context.entity(selectedIDs[0]).type !== 'node';
+	  };
 
-	  return (!e1.isSubject && e2.isSubject) ? 1 : -1;
-	}
-	/* eslint-enable no-unused-vars */
+	  operation.disabled = function () {
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    } else if (selectedIDs.some(incompleteRelation)) {
+	      return 'incomplete_relation';
+	    }
 
-	/**
-	 * @param  {SweepEvent} se
-	 * @param  {Array.<Number>} p
-	 * @param  {Queue} queue
-	 * @return {Queue}
-	 */
-	function divideSegment(se, p, queue)  {
-	  var r = new SweepEvent(p, false, se,            se.isSubject);
-	  var l = new SweepEvent(p, true,  se.otherEvent, se.isSubject);
+	    return false;
 
-	  /* eslint-disable no-console */
-	  if (equals(se.point, se.otherEvent.point)) {
-	    console.warn('what is that, a collapsed segment?', se);
-	  }
-	  /* eslint-enable no-console */
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	  r.contourId = l.contourId = se.contourId;
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	  // avoid a rounding error. The left event would be processed after the right event
-	  if (compareEvents(l, se.otherEvent) > 0) {
-	    se.otherEvent.left = true;
-	    l.left = false;
-	  }
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	  // avoid a rounding error. The left event would be processed after the right event
-	  // if (compareEvents(se, r) > 0) {}
+	      return false;
+	    }
 
-	  se.otherEvent.otherEvent = l;
-	  se.otherEvent = r;
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
+	  };
 
-	  queue.push(l);
-	  queue.push(r);
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
+	  };
 
-	  return queue;
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.move.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
+
+	  operation.id = 'move';
+	  operation.keys = [_t('operations.move.key')];
+	  operation.title = _t('operations.move.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  operation.mouseOnly = true;
+	  return operation;
 	}
 
-	//const EPS = 1e-9;
+	function modeRotate(context, entityIDs) {
+	  var mode = {
+	    id: 'rotate',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('rotate');
+	  var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationMove(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior];
+	  var annotation = entityIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.rotate.annotation.feature', {
+	    n: entityIDs.length
+	  });
 
-	/**
-	 * Finds the magnitude of the cross product of two vectors (if we pretend
-	 * they're in three dimensions)
-	 *
-	 * @param {Object} a First vector
-	 * @param {Object} b Second vector
-	 * @private
-	 * @returns {Number} The magnitude of the cross product
-	 */
-	function crossProduct(a, b) {
-	  return (a[0] * b[1]) - (a[1] * b[0]);
-	}
+	  var _prevGraph;
 
-	/**
-	 * Finds the dot product of two vectors.
-	 *
-	 * @param {Object} a First vector
-	 * @param {Object} b Second vector
-	 * @private
-	 * @returns {Number} The dot product
-	 */
-	function dotProduct(a, b) {
-	  return (a[0] * b[0]) + (a[1] * b[1]);
-	}
+	  var _prevAngle;
 
-	/**
-	 * Finds the intersection (if any) between two line segments a and b, given the
-	 * line segments' end points a1, a2 and b1, b2.
-	 *
-	 * This algorithm is based on Schneider and Eberly.
-	 * http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf
-	 * Page 244.
-	 *
-	 * @param {Array.<Number>} a1 point of first line
-	 * @param {Array.<Number>} a2 point of first line
-	 * @param {Array.<Number>} b1 point of second line
-	 * @param {Array.<Number>} b2 point of second line
-	 * @param {Boolean=}       noEndpointTouch whether to skip single touchpoints
-	 *                                         (meaning connected segments) as
-	 *                                         intersections
-	 * @returns {Array.<Array.<Number>>|Null} If the lines intersect, the point of
-	 * intersection. If they overlap, the two end points of the overlapping segment.
-	 * Otherwise, null.
-	 */
-	function intersection (a1, a2, b1, b2, noEndpointTouch) {
-	  // The algorithm expects our lines in the form P + sd, where P is a point,
-	  // s is on the interval [0, 1], and d is a vector.
-	  // We are passed two points. P can be the first point of each pair. The
-	  // vector, then, could be thought of as the distance (in x and y components)
-	  // from the first point to the second point.
-	  // So first, let's make our vectors:
-	  var va = [a2[0] - a1[0], a2[1] - a1[1]];
-	  var vb = [b2[0] - b1[0], b2[1] - b1[1]];
-	  // We also define a function to convert back to regular point form:
+	  var _prevTransform;
 
-	  /* eslint-disable arrow-body-style */
+	  var _pivot;
 
-	  function toPoint(p, s, d) {
-	    return [
-	      p[0] + s * d[0],
-	      p[1] + s * d[1]
-	    ];
-	  }
+	  function doRotate() {
+	    var fn;
 
-	  /* eslint-enable arrow-body-style */
+	    if (context.graph() !== _prevGraph) {
+	      fn = context.perform;
+	    } else {
+	      fn = context.replace;
+	    } // projection changed, recalculate _pivot
 
-	  // The rest is pretty much a straight port of the algorithm.
-	  var e = [b1[0] - a1[0], b1[1] - a1[1]];
-	  var kross    = crossProduct(va, vb);
-	  var sqrKross = kross * kross;
-	  var sqrLenA  = dotProduct(va, va);
-	  //const sqrLenB  = dotProduct(vb, vb);
 
-	  // Check for line intersection. This works because of the properties of the
-	  // cross product -- specifically, two vectors are parallel if and only if the
-	  // cross product is the 0 vector. The full calculation involves relative error
-	  // to account for possible very small line segments. See Schneider & Eberly
-	  // for details.
-	  if (sqrKross > 0/* EPS * sqrLenB * sqLenA */) {
-	    // If they're not parallel, then (because these are line segments) they
-	    // still might not actually intersect. This code checks that the
-	    // intersection point of the lines is actually on both line segments.
-	    var s = crossProduct(e, vb) / kross;
-	    if (s < 0 || s > 1) {
-	      // not on line segment a
-	      return null;
-	    }
-	    var t = crossProduct(e, va) / kross;
-	    if (t < 0 || t > 1) {
-	      // not on line segment b
-	      return null;
-	    }
-	    if (s === 0 || s === 1) {
-	      // on an endpoint of line segment a
-	      return noEndpointTouch ? null : [toPoint(a1, s, va)];
-	    }
-	    if (t === 0 || t === 1) {
-	      // on an endpoint of line segment b
-	      return noEndpointTouch ? null : [toPoint(b1, t, vb)];
-	    }
-	    return [toPoint(a1, s, va)];
-	  }
+	    var projection = context.projection;
+	    var currTransform = projection.transform();
 
-	  // If we've reached this point, then the lines are either parallel or the
-	  // same, but the segments could overlap partially or fully, or not at all.
-	  // So we need to find the overlap, if any. To do that, we can use e, which is
-	  // the (vector) difference between the two initial points. If this is parallel
-	  // with the line itself, then the two lines are the same line, and there will
-	  // be overlap.
-	  //const sqrLenE = dotProduct(e, e);
-	  kross = crossProduct(e, va);
-	  sqrKross = kross * kross;
+	    if (!_prevTransform || currTransform.k !== _prevTransform.k || currTransform.x !== _prevTransform.x || currTransform.y !== _prevTransform.y) {
+	      var nodes = utilGetAllNodes(entityIDs, context.graph());
+	      var points = nodes.map(function (n) {
+	        return projection(n.loc);
+	      });
+	      _pivot = getPivot(points);
+	      _prevAngle = undefined;
+	    }
 
-	  if (sqrKross > 0 /* EPS * sqLenB * sqLenE */) {
-	  // Lines are just parallel, not the same. No overlap.
-	    return null;
+	    var currMouse = context.map().mouse();
+	    var currAngle = Math.atan2(currMouse[1] - _pivot[1], currMouse[0] - _pivot[0]);
+	    if (typeof _prevAngle === 'undefined') _prevAngle = currAngle;
+	    var delta = currAngle - _prevAngle;
+	    fn(actionRotate(entityIDs, _pivot, delta, projection));
+	    _prevTransform = currTransform;
+	    _prevAngle = currAngle;
+	    _prevGraph = context.graph();
 	  }
 
-	  var sa = dotProduct(va, e) / sqrLenA;
-	  var sb = sa + dotProduct(va, vb) / sqrLenA;
-	  var smin = Math.min(sa, sb);
-	  var smax = Math.max(sa, sb);
+	  function getPivot(points) {
+	    var _pivot;
 
-	  // this is, essentially, the FindIntersection acting on floats from
-	  // Schneider & Eberly, just inlined into this function.
-	  if (smin <= 1 && smax >= 0) {
+	    if (points.length === 1) {
+	      _pivot = points[0];
+	    } else if (points.length === 2) {
+	      _pivot = geoVecInterp(points[0], points[1], 0.5);
+	    } else {
+	      var polygonHull = d3_polygonHull(points);
 
-	    // overlap on an end point
-	    if (smin === 1) {
-	      return noEndpointTouch ? null : [toPoint(a1, smin > 0 ? smin : 0, va)];
+	      if (polygonHull.length === 2) {
+	        _pivot = geoVecInterp(points[0], points[1], 0.5);
+	      } else {
+	        _pivot = d3_polygonCentroid(d3_polygonHull(points));
+	      }
 	    }
 
-	    if (smax === 0) {
-	      return noEndpointTouch ? null : [toPoint(a1, smax < 1 ? smax : 1, va)];
-	    }
+	    return _pivot;
+	  }
 
-	    if (noEndpointTouch && smin === 0 && smax === 1) { return null; }
+	  function finish(d3_event) {
+	    d3_event.stopPropagation();
+	    context.replace(actionNoop(), annotation);
+	    context.enter(modeSelect(context, entityIDs));
+	  }
 
-	    // There's overlap on a segment -- two points of intersection. Return both.
-	    return [
-	      toPoint(a1, smin > 0 ? smin : 0, va),
-	      toPoint(a1, smax < 1 ? smax : 1, va)
-	    ];
+	  function cancel() {
+	    context.pop();
+	    context.enter(modeSelect(context, entityIDs));
 	  }
 
-	  return null;
-	}
+	  function undone() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	/**
-	 * @param  {SweepEvent} se1
-	 * @param  {SweepEvent} se2
-	 * @param  {Queue}      queue
-	 * @return {Number}
-	 */
-	function possibleIntersection (se1, se2, queue) {
-	  // that disallows self-intersecting polygons,
-	  // did cost us half a day, so I'll leave it
-	  // out of respect
-	  // if (se1.isSubject === se2.isSubject) return;
-	  var inter = intersection(
-	    se1.point, se1.otherEvent.point,
-	    se2.point, se2.otherEvent.point
-	  );
+	  mode.enter = function () {
+	    context.features().forceVisible(entityIDs);
+	    behaviors.forEach(context.install);
+	    context.surface().on('mousemove.rotate', doRotate).on('click.rotate', finish);
+	    context.history().on('undone.rotate', undone);
+	    keybinding.on('⎋', cancel).on('↩', finish);
+	    select(document).call(keybinding);
+	  };
 
-	  var nintersections = inter ? inter.length : 0;
-	  if (nintersections === 0) { return 0; } // no intersection
+	  mode.exit = function () {
+	    behaviors.forEach(context.uninstall);
+	    context.surface().on('mousemove.rotate', null).on('click.rotate', null);
+	    context.history().on('undone.rotate', null);
+	    select(document).call(keybinding.unbind);
+	    context.features().forceVisible([]);
+	  };
 
-	  // the line segments intersect at an endpoint of both line segments
-	  if ((nintersections === 1) &&
-	      (equals(se1.point, se2.point) ||
-	       equals(se1.otherEvent.point, se2.otherEvent.point))) {
-	    return 0;
-	  }
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return entityIDs; // no assign
 
-	  if (nintersections === 2 && se1.isSubject === se2.isSubject) {
-	    // if(se1.contourId === se2.contourId){
-	    // console.warn('Edges of the same polygon overlap',
-	    //   se1.point, se1.otherEvent.point, se2.point, se2.otherEvent.point);
-	    // }
-	    //throw new Error('Edges of the same polygon overlap');
-	    return 0;
-	  }
+	    return mode;
+	  };
 
-	  // The line segments associated to se1 and se2 intersect
-	  if (nintersections === 1) {
+	  return mode;
+	}
 
-	    // if the intersection point is not an endpoint of se1
-	    if (!equals(se1.point, inter[0]) && !equals(se1.otherEvent.point, inter[0])) {
-	      divideSegment(se1, inter[0], queue);
-	    }
+	function operationRotate(context, selectedIDs) {
+	  var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	  var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	  var coords = nodes.map(function (n) {
+	    return n.loc;
+	  });
+	  var extent = utilTotalExtent(selectedIDs, context.graph());
 
-	    // if the intersection point is not an endpoint of se2
-	    if (!equals(se2.point, inter[0]) && !equals(se2.otherEvent.point, inter[0])) {
-	      divideSegment(se2, inter[0], queue);
+	  var operation = function operation() {
+	    context.enter(modeRotate(context, selectedIDs));
+	  };
+
+	  operation.available = function () {
+	    return nodes.length >= 2;
+	  };
+
+	  operation.disabled = function () {
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    } else if (selectedIDs.some(incompleteRelation)) {
+	      return 'incomplete_relation';
 	    }
-	    return 1;
-	  }
 
-	  // The line segments associated to se1 and se2 overlap
-	  var events        = [];
-	  var leftCoincide  = false;
-	  var rightCoincide = false;
+	    return false;
 
-	  if (equals(se1.point, se2.point)) {
-	    leftCoincide = true; // linked
-	  } else if (compareEvents(se1, se2) === 1) {
-	    events.push(se2, se1);
-	  } else {
-	    events.push(se1, se2);
-	  }
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	  if (equals(se1.otherEvent.point, se2.otherEvent.point)) {
-	    rightCoincide = true;
-	  } else if (compareEvents(se1.otherEvent, se2.otherEvent) === 1) {
-	    events.push(se2.otherEvent, se1.otherEvent);
-	  } else {
-	    events.push(se1.otherEvent, se2.otherEvent);
-	  }
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	  if ((leftCoincide && rightCoincide) || leftCoincide) {
-	    // both line segments are equal or share the left endpoint
-	    se2.type = NON_CONTRIBUTING;
-	    se1.type = (se2.inOut === se1.inOut)
-	      ? SAME_TRANSITION : DIFFERENT_TRANSITION;
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	    if (leftCoincide && !rightCoincide) {
-	      // honestly no idea, but changing events selection from [2, 1]
-	      // to [0, 1] fixes the overlapping self-intersecting polygons issue
-	      divideSegment(events[1].otherEvent, events[0].point, queue);
+	      return false;
 	    }
-	    return 2;
-	  }
 
-	  // the line segments share the right endpoint
-	  if (rightCoincide) {
-	    divideSegment(events[0], events[1].point, queue);
-	    return 3;
-	  }
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
+	  };
 
-	  // no line segment includes totally the other one
-	  if (events[0] !== events[3].otherEvent) {
-	    divideSegment(events[0], events[1].point, queue);
-	    divideSegment(events[1], events[2].point, queue);
-	    return 3;
-	  }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.rotate.' + disable + '.' + multi) : _t('operations.rotate.description.' + multi);
+	  };
 
-	  // one line segment includes the other one
-	  divideSegment(events[0], events[1].point, queue);
-	  divideSegment(events[3].otherEvent, events[2].point, queue);
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	  return 3;
+	  operation.id = 'rotate';
+	  operation.keys = [_t('operations.rotate.key')];
+	  operation.title = _t('operations.rotate.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  operation.mouseOnly = true;
+	  return operation;
 	}
 
-	/**
-	 * @param  {SweepEvent} le1
-	 * @param  {SweepEvent} le2
-	 * @return {Number}
-	 */
-	function compareSegments(le1, le2) {
-	  if (le1 === le2) { return 0; }
+	function modeMove(context, entityIDs, baseGraph) {
+	  var mode = {
+	    id: 'move',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('move');
+	  var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior, operationRotate(context, entityIDs).behavior];
+	  var annotation = entityIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.move.annotation.feature', {
+	    n: entityIDs.length
+	  });
 
-	  // Segments are not collinear
-	  if (signedArea(le1.point, le1.otherEvent.point, le2.point) !== 0 ||
-	    signedArea(le1.point, le1.otherEvent.point, le2.otherEvent.point) !== 0) {
+	  var _prevGraph;
 
-	    // If they share their left endpoint use the right endpoint to sort
-	    if (equals(le1.point, le2.point)) { return le1.isBelow(le2.otherEvent.point) ? -1 : 1; }
+	  var _cache;
+
+	  var _origin;
+
+	  var _nudgeInterval;
+
+	  function doMove(nudge) {
+	    nudge = nudge || [0, 0];
+	    var fn;
+
+	    if (_prevGraph !== context.graph()) {
+	      _cache = {};
+	      _origin = context.map().mouseCoordinates();
+	      fn = context.perform;
+	    } else {
+	      fn = context.overwrite;
+	    }
+
+	    var currMouse = context.map().mouse();
+	    var origMouse = context.projection(_origin);
+	    var delta = geoVecSubtract(geoVecSubtract(currMouse, origMouse), nudge);
+	    fn(actionMove(entityIDs, delta, context.projection, _cache));
+	    _prevGraph = context.graph();
+	  }
+
+	  function startNudge(nudge) {
+	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+	    _nudgeInterval = window.setInterval(function () {
+	      context.map().pan(nudge);
+	      doMove(nudge);
+	    }, 50);
+	  }
+
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
+	    }
+	  }
 
-	    // Different left endpoint: use the left endpoint to sort
-	    if (le1.point[0] === le2.point[0]) { return le1.point[1] < le2.point[1] ? -1 : 1; }
+	  function move() {
+	    doMove();
+	    var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
 
-	    // has the line segment associated to e1 been inserted
-	    // into S after the line segment associated to e2 ?
-	    if (compareEvents(le1, le2) === 1) { return le2.isAbove(le1.point) ? -1 : 1; }
+	    if (nudge) {
+	      startNudge(nudge);
+	    } else {
+	      stopNudge();
+	    }
+	  }
 
-	    // The line segment associated to e2 has been inserted
-	    // into S after the line segment associated to e1
-	    return le1.isBelow(le2.point) ? -1 : 1;
+	  function finish(d3_event) {
+	    d3_event.stopPropagation();
+	    context.replace(actionNoop(), annotation);
+	    context.enter(modeSelect(context, entityIDs));
+	    stopNudge();
 	  }
 
-	  if (le1.isSubject === le2.isSubject) { // same polygon
-	    var p1 = le1.point, p2 = le2.point;
-	    if (p1[0] === p2[0] && p1[1] === p2[1]/*equals(le1.point, le2.point)*/) {
-	      p1 = le1.otherEvent.point; p2 = le2.otherEvent.point;
-	      if (p1[0] === p2[0] && p1[1] === p2[1]) { return 0; }
-	      else { return le1.contourId > le2.contourId ? 1 : -1; }
+	  function cancel() {
+	    if (baseGraph) {
+	      while (context.graph() !== baseGraph) {
+	        context.pop();
+	      }
+
+	      context.enter(modeBrowse(context));
+	    } else {
+	      context.pop();
+	      context.enter(modeSelect(context, entityIDs));
 	    }
-	  } else { // Segments are collinear, but belong to separate polygons
-	    return le1.isSubject ? -1 : 1;
+
+	    stopNudge();
 	  }
 
-	  return compareEvents(le1, le2) === 1 ? 1 : -1;
-	}
+	  function undone() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	function subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation) {
-	  var sweepLine = new SplayTree(compareSegments);
-	  var sortedEvents = [];
+	  mode.enter = function () {
+	    _origin = context.map().mouseCoordinates();
+	    _prevGraph = null;
+	    _cache = {};
+	    context.features().forceVisible(entityIDs);
+	    behaviors.forEach(context.install);
+	    context.surface().on('mousemove.move', move).on('click.move', finish);
+	    context.history().on('undone.move', undone);
+	    keybinding.on('⎋', cancel).on('↩', finish);
+	    select(document).call(keybinding);
+	  };
 
-	  var rightbound = Math.min(sbbox[2], cbbox[2]);
+	  mode.exit = function () {
+	    stopNudge();
+	    behaviors.forEach(function (behavior) {
+	      context.uninstall(behavior);
+	    });
+	    context.surface().on('mousemove.move', null).on('click.move', null);
+	    context.history().on('undone.move', null);
+	    select(document).call(keybinding.unbind);
+	    context.features().forceVisible([]);
+	  };
 
-	  var prev, next, begin;
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return entityIDs; // no assign
 
-	  while (eventQueue.length !== 0) {
-	    var event = eventQueue.pop();
-	    sortedEvents.push(event);
+	    return mode;
+	  };
 
-	    // optimization by bboxes for intersection and difference goes here
-	    if ((operation === INTERSECTION && event.point[0] > rightbound) ||
-	        (operation === DIFFERENCE   && event.point[0] > sbbox[2])) {
-	      break;
-	    }
+	  return mode;
+	}
 
-	    if (event.left) {
-	      next  = prev = sweepLine.insert(event);
-	      begin = sweepLine.minNode();
+	function behaviorPaste(context) {
+	  function doPaste(d3_event) {
+	    // prevent paste during low zoom selection
+	    if (!context.map().withinEditableZoom()) return;
+	    d3_event.preventDefault();
+	    var baseGraph = context.graph();
+	    var mouse = context.map().mouse();
+	    var projection = context.projection;
+	    var viewport = geoExtent(projection.clipExtent()).polygon();
+	    if (!geoPointInPolygon(mouse, viewport)) return;
+	    var oldIDs = context.copyIDs();
+	    if (!oldIDs.length) return;
+	    var extent = geoExtent();
+	    var oldGraph = context.copyGraph();
+	    var newIDs = [];
+	    var action = actionCopyEntities(oldIDs, oldGraph);
+	    context.perform(action);
+	    var copies = action.copies();
+	    var originals = new Set();
+	    Object.values(copies).forEach(function (entity) {
+	      originals.add(entity.id);
+	    });
 
-	      if (prev !== begin) { prev = sweepLine.prev(prev); }
-	      else                { prev = null; }
+	    for (var id in copies) {
+	      var oldEntity = oldGraph.entity(id);
+	      var newEntity = copies[id];
 
-	      next = sweepLine.next(next);
+	      extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-	      var prevEvent = prev ? prev.key : null;
-	      var prevprevEvent = (void 0);
-	      computeFields(event, prevEvent, operation);
-	      if (next) {
-	        if (possibleIntersection(event, next.key, eventQueue) === 2) {
-	          computeFields(event, prevEvent, operation);
-	          computeFields(event, next.key, operation);
-	        }
-	      }
 
-	      if (prev) {
-	        if (possibleIntersection(prev.key, event, eventQueue) === 2) {
-	          var prevprev = prev;
-	          if (prevprev !== begin) { prevprev = sweepLine.prev(prevprev); }
-	          else                    { prevprev = null; }
+	      var parents = context.graph().parentWays(newEntity);
+	      var parentCopied = parents.some(function (parent) {
+	        return originals.has(parent.id);
+	      });
 
-	          prevprevEvent = prevprev ? prevprev.key : null;
-	          computeFields(prevEvent, prevprevEvent, operation);
-	          computeFields(event,     prevEvent,     operation);
-	        }
+	      if (!parentCopied) {
+	        newIDs.push(newEntity.id);
 	      }
-	    } else {
-	      event = event.otherEvent;
-	      next = prev = sweepLine.find(event);
-
-	      if (prev && next) {
+	    } // Put pasted objects where mouse pointer is..
 
-	        if (prev !== begin) { prev = sweepLine.prev(prev); }
-	        else                { prev = null; }
 
-	        next = sweepLine.next(next);
-	        sweepLine.remove(event);
+	    var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
+	    var delta = geoVecSubtract(mouse, copyPoint);
+	    context.perform(actionMove(newIDs, delta, projection));
+	    context.enter(modeMove(context, newIDs, baseGraph));
+	  }
 
-	        if (next && prev) {
-	          possibleIntersection(prev.key, next.key, eventQueue);
-	        }
-	      }
-	    }
+	  function behavior() {
+	    context.keybinding().on(uiCmd('⌘V'), doPaste);
+	    return behavior;
 	  }
-	  return sortedEvents;
+
+	  behavior.off = function () {
+	    context.keybinding().off(uiCmd('⌘V'));
+	  };
+
+	  return behavior;
 	}
 
-	var Contour = function Contour() {
-	  this.points = [];
-	  this.holeIds = [];
-	  this.holeOf = null;
-	  this.depth = null;
-	};
+	// `String.prototype.repeat` method
+	// https://tc39.github.io/ecma262/#sec-string.prototype.repeat
+	_export({ target: 'String', proto: true }, {
+	  repeat: stringRepeat
+	});
 
-	Contour.prototype.isExterior = function isExterior () {
-	  return this.holeOf == null;
-	};
+	/*
+	    `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
 
-	/**
-	 * @param  {Array.<SweepEvent>} sortedEvents
-	 * @return {Array.<SweepEvent>}
+	    * The `origin` function is expected to return an [x, y] tuple rather than an
+	      {x, y} object.
+	    * The events are `start`, `move`, and `end`.
+	      (https://github.com/mbostock/d3/issues/563)
+	    * The `start` event is not dispatched until the first cursor movement occurs.
+	      (https://github.com/mbostock/d3/pull/368)
+	    * The `move` event has a `point` and `delta` [x, y] tuple properties rather
+	      than `x`, `y`, `dx`, and `dy` properties.
+	    * The `end` event is not dispatched if no movement occurs.
+	    * An `off` function is available that unbinds the drag's internal event handlers.
 	 */
-	function orderEvents(sortedEvents) {
-	  var event, i, len, tmp;
-	  var resultEvents = [];
-	  for (i = 0, len = sortedEvents.length; i < len; i++) {
-	    event = sortedEvents[i];
-	    if ((event.left && event.inResult) ||
-	      (!event.left && event.otherEvent.inResult)) {
-	      resultEvents.push(event);
-	    }
-	  }
-	  // Due to overlapping edges the resultEvents array can be not wholly sorted
-	  var sorted = false;
-	  while (!sorted) {
-	    sorted = true;
-	    for (i = 0, len = resultEvents.length; i < len; i++) {
-	      if ((i + 1) < len &&
-	        compareEvents(resultEvents[i], resultEvents[i + 1]) === 1) {
-	        tmp = resultEvents[i];
-	        resultEvents[i] = resultEvents[i + 1];
-	        resultEvents[i + 1] = tmp;
-	        sorted = false;
-	      }
-	    }
-	  }
 
+	function behaviorDrag() {
+	  var dispatch$1 = dispatch('start', 'move', 'end'); // see also behaviorSelect
 
-	  for (i = 0, len = resultEvents.length; i < len; i++) {
-	    event = resultEvents[i];
-	    event.otherPos = i;
-	  }
+	  var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
 
-	  // imagine, the right event is found in the beginning of the queue,
-	  // when his left counterpart is not marked yet
-	  for (i = 0, len = resultEvents.length; i < len; i++) {
-	    event = resultEvents[i];
-	    if (!event.left) {
-	      tmp = event.otherPos;
-	      event.otherPos = event.otherEvent.otherPos;
-	      event.otherEvent.otherPos = tmp;
-	    }
-	  }
+	  var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
 
-	  return resultEvents;
-	}
+	  var _origin = null;
+	  var _selector = '';
 
+	  var _targetNode;
 
-	/**
-	 * @param  {Number} pos
-	 * @param  {Array.<SweepEvent>} resultEvents
-	 * @param  {Object>}    processed
-	 * @return {Number}
-	 */
-	function nextPos(pos, resultEvents, processed, origPos) {
-	  var newPos = pos + 1,
-	      p = resultEvents[pos].point,
-	      p1;
-	  var length = resultEvents.length;
+	  var _targetEntity;
 
-	  if (newPos < length)
-	    { p1 = resultEvents[newPos].point; }
+	  var _surface;
 
-	  while (newPos < length && p1[0] === p[0] && p1[1] === p[1]) {
-	    if (!processed[newPos]) {
-	      return newPos;
-	    } else   {
-	      newPos++;
-	    }
-	    p1 = resultEvents[newPos].point;
-	  }
+	  var _pointerId; // use pointer events on supported platforms; fallback to mouse events
 
-	  newPos = pos - 1;
 
-	  while (processed[newPos] && newPos > origPos) {
-	    newPos--;
-	  }
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	  return newPos;
-	}
+	  var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
 
+	  var d3_event_userSelectSuppress = function d3_event_userSelectSuppress() {
+	    var selection$1 = selection();
+	    var select = selection$1.style(d3_event_userSelectProperty);
+	    selection$1.style(d3_event_userSelectProperty, 'none');
+	    return function () {
+	      selection$1.style(d3_event_userSelectProperty, select);
+	    };
+	  };
 
-	function initializeContourFromContext(event, contours, contourId) {
-	  var contour = new Contour();
-	  if (event.prevInResult != null) {
-	    var prevInResult = event.prevInResult;
-	    // Note that it is valid to query the "previous in result" for its output contour id,
-	    // because we must have already processed it (i.e., assigned an output contour id)
-	    // in an earlier iteration, otherwise it wouldn't be possible that it is "previous in
-	    // result".
-	    var lowerContourId = prevInResult.outputContourId;
-	    var lowerResultTransition = prevInResult.resultTransition;
-	    if (lowerResultTransition > 0) {
-	      // We are inside. Now we have to check if the thing below us is another hole or
-	      // an exterior contour.
-	      var lowerContour = contours[lowerContourId];
-	      if (lowerContour.holeOf != null) {
-	        // The lower contour is a hole => Connect the new contour as a hole to its parent,
-	        // and use same depth.
-	        var parentContourId = lowerContour.holeOf;
-	        contours[parentContourId].holeIds.push(contourId);
-	        contour.holeOf = parentContourId;
-	        contour.depth = contours[lowerContourId].depth;
-	      } else {
-	        // The lower contour is an exterior contour => Connect the new contour as a hole,
-	        // and increment depth.
-	        contours[lowerContourId].holeIds.push(contourId);
-	        contour.holeOf = lowerContourId;
-	        contour.depth = contours[lowerContourId].depth + 1;
-	      }
+	  function pointerdown(d3_event) {
+	    if (_pointerId) return;
+	    _pointerId = d3_event.pointerId || 'mouse';
+	    _targetNode = this; // only force reflow once per drag
+
+	    var pointerLocGetter = utilFastMouse(_surface || _targetNode.parentNode);
+	    var offset;
+	    var startOrigin = pointerLocGetter(d3_event);
+	    var started = false;
+	    var selectEnable = d3_event_userSelectSuppress();
+	    select(window).on(_pointerPrefix + 'move.drag', pointermove).on(_pointerPrefix + 'up.drag pointercancel.drag', pointerup, true);
+
+	    if (_origin) {
+	      offset = _origin.call(_targetNode, _targetEntity);
+	      offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
 	    } else {
-	      // We are outside => this contour is an exterior contour of same depth.
-	      contour.holeOf = null;
-	      contour.depth = contours[lowerContourId].depth;
+	      offset = [0, 0];
 	    }
-	  } else {
-	    // There is no lower/previous contour => this contour is an exterior contour of depth 0.
-	    contour.holeOf = null;
-	    contour.depth = 0;
-	  }
-	  return contour;
-	}
 
-	/**
-	 * @param  {Array.<SweepEvent>} sortedEvents
-	 * @return {Array.<*>} polygons
-	 */
-	function connectEdges(sortedEvents) {
-	  var i, len;
-	  var resultEvents = orderEvents(sortedEvents);
+	    d3_event.stopPropagation();
 
-	  // "false"-filled array
-	  var processed = {};
-	  var contours = [];
+	    function pointermove(d3_event) {
+	      if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      var p = pointerLocGetter(d3_event);
 
-	  var loop = function (  ) {
+	      if (!started) {
+	        var dist = geoVecLength(startOrigin, p);
+	        var tolerance = d3_event.pointerType === 'pen' ? _penTolerancePx : _tolerancePx; // don't start until the drag has actually moved somewhat
 
-	    if (processed[i]) {
-	      return;
+	        if (dist < tolerance) return;
+	        started = true;
+	        dispatch$1.call('start', this, d3_event, _targetEntity); // Don't send a `move` event in the same cycle as `start` since dragging
+	        // a midpoint will convert the target to a node.
+	      } else {
+	        startOrigin = p;
+	        d3_event.stopPropagation();
+	        d3_event.preventDefault();
+	        var dx = p[0] - startOrigin[0];
+	        var dy = p[1] - startOrigin[1];
+	        dispatch$1.call('move', this, d3_event, _targetEntity, [p[0] + offset[0], p[1] + offset[1]], [dx, dy]);
+	      }
 	    }
 
-	    var contourId = contours.length;
-	    var contour = initializeContourFromContext(resultEvents[i], contours, contourId);
+	    function pointerup(d3_event) {
+	      if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      _pointerId = null;
 
-	    // Helper function that combines marking an event as processed with assigning its output contour ID
-	    var markAsProcessed = function (pos) {
-	      processed[pos] = true;
-	      resultEvents[pos].outputContourId = contourId;
-	    };
+	      if (started) {
+	        dispatch$1.call('end', this, d3_event, _targetEntity);
+	        d3_event.preventDefault();
+	      }
 
-	    var pos = i;
-	    var origPos = i;
+	      select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+	      selectEnable();
+	    }
+	  }
 
-	    var initial = resultEvents[i].point;
-	    contour.points.push(initial);
+	  function behavior(selection) {
+	    var matchesSelector = utilPrefixDOMProperty('matchesSelector');
+	    var delegate = pointerdown;
 
-	    /* eslint no-constant-condition: "off" */
-	    while (true) {
-	      markAsProcessed(pos);
+	    if (_selector) {
+	      delegate = function delegate(d3_event) {
+	        var root = this;
+	        var target = d3_event.target;
 
-	      pos = resultEvents[pos].otherPos;
+	        for (; target && target !== root; target = target.parentNode) {
+	          var datum = target.__data__;
+	          _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;
 
-	      markAsProcessed(pos);
-	      contour.points.push(resultEvents[pos].point);
+	          if (_targetEntity && target[matchesSelector](_selector)) {
+	            return pointerdown.call(target, d3_event);
+	          }
+	        }
+	      };
+	    }
 
-	      pos = nextPos(pos, resultEvents, processed, origPos);
+	    selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
+	  }
 
-	      if (pos == origPos) {
-	        break;
-	      }
-	    }
+	  behavior.off = function (selection) {
+	    selection.on(_pointerPrefix + 'down.drag' + _selector, null);
+	  };
 
-	    contours.push(contour);
+	  behavior.selector = function (_) {
+	    if (!arguments.length) return _selector;
+	    _selector = _;
+	    return behavior;
 	  };
 
-	  for (i = 0, len = resultEvents.length; i < len; i++) loop(  );
+	  behavior.origin = function (_) {
+	    if (!arguments.length) return _origin;
+	    _origin = _;
+	    return behavior;
+	  };
 
-	  return contours;
-	}
+	  behavior.cancel = function () {
+	    select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+	    return behavior;
+	  };
 
-	var tinyqueue = TinyQueue;
-	var _default$1 = TinyQueue;
+	  behavior.targetNode = function (_) {
+	    if (!arguments.length) return _targetNode;
+	    _targetNode = _;
+	    return behavior;
+	  };
 
-	function TinyQueue(data, compare) {
-	    if (!(this instanceof TinyQueue)) { return new TinyQueue(data, compare); }
+	  behavior.targetEntity = function (_) {
+	    if (!arguments.length) return _targetEntity;
+	    _targetEntity = _;
+	    return behavior;
+	  };
 
-	    this.data = data || [];
-	    this.length = this.data.length;
-	    this.compare = compare || defaultCompare$1;
+	  behavior.surface = function (_) {
+	    if (!arguments.length) return _surface;
+	    _surface = _;
+	    return behavior;
+	  };
 
-	    if (this.length > 0) {
-	        for (var i = (this.length >> 1) - 1; i >= 0; i--) { this._down(i); }
-	    }
+	  return utilRebind(behavior, dispatch$1, 'on');
 	}
 
-	function defaultCompare$1(a, b) {
-	    return a < b ? -1 : a > b ? 1 : 0;
-	}
+	function modeDragNode(context) {
+	  var mode = {
+	    id: 'drag-node',
+	    button: 'browse'
+	  };
+	  var hover = behaviorHover(context).altDisables(true).on('hover', context.ui().sidebar.hover);
+	  var edit = behaviorEdit(context);
 
-	TinyQueue.prototype = {
+	  var _nudgeInterval;
 
-	    push: function (item) {
-	        this.data.push(item);
-	        this.length++;
-	        this._up(this.length - 1);
-	    },
+	  var _restoreSelectedIDs = [];
+	  var _wasMidpoint = false;
+	  var _isCancelled = false;
 
-	    pop: function () {
-	        if (this.length === 0) { return undefined; }
+	  var _activeEntity;
 
-	        var top = this.data[0];
-	        this.length--;
+	  var _startLoc;
 
-	        if (this.length > 0) {
-	            this.data[0] = this.data[this.length];
-	            this._down(0);
-	        }
-	        this.data.pop();
+	  var _lastLoc;
 
-	        return top;
-	    },
+	  function startNudge(d3_event, entity, nudge) {
+	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+	    _nudgeInterval = window.setInterval(function () {
+	      context.map().pan(nudge);
+	      doMove(d3_event, entity, nudge);
+	    }, 50);
+	  }
 
-	    peek: function () {
-	        return this.data[0];
-	    },
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
+	    }
+	  }
+
+	  function moveAnnotation(entity) {
+	    return _t('operations.move.annotation.' + entity.geometry(context.graph()));
+	  }
+
+	  function connectAnnotation(nodeEntity, targetEntity) {
+	    var nodeGeometry = nodeEntity.geometry(context.graph());
+	    var targetGeometry = targetEntity.geometry(context.graph());
 
-	    _up: function (pos) {
-	        var data = this.data;
-	        var compare = this.compare;
-	        var item = data[pos];
+	    if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
+	      var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
+	      var targetParentWayIDs = context.graph().parentWays(targetEntity);
+	      var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs); // if both vertices are part of the same way
 
-	        while (pos > 0) {
-	            var parent = (pos - 1) >> 1;
-	            var current = data[parent];
-	            if (compare(item, current) >= 0) { break; }
-	            data[pos] = current;
-	            pos = parent;
+	      if (sharedParentWays.length !== 0) {
+	        // if the nodes are next to each other, they are merged
+	        if (sharedParentWays[0].areAdjacent(nodeEntity.id, targetEntity.id)) {
+	          return _t('operations.connect.annotation.from_vertex.to_adjacent_vertex');
 	        }
 
-	        data[pos] = item;
-	    },
+	        return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
+	      }
+	    }
 
-	    _down: function (pos) {
-	        var data = this.data;
-	        var compare = this.compare;
-	        var halfLength = this.length >> 1;
-	        var item = data[pos];
+	    return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
+	  }
 
-	        while (pos < halfLength) {
-	            var left = (pos << 1) + 1;
-	            var right = left + 1;
-	            var best = data[left];
+	  function shouldSnapToNode(target) {
+	    if (!_activeEntity) return false;
+	    return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
+	  }
 
-	            if (right < this.length && compare(data[right], best) < 0) {
-	                left = right;
-	                best = data[right];
-	            }
-	            if (compare(best, item) >= 0) { break; }
+	  function origin(entity) {
+	    return context.projection(entity.loc);
+	  }
 
-	            data[pos] = best;
-	            pos = left;
-	        }
+	  function keydown(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope')) {
+	        context.surface().classed('nope-suppressed', true);
+	      }
 
-	        data[pos] = item;
+	      context.surface().classed('nope', false).classed('nope-disabled', true);
 	    }
-	};
-	tinyqueue.default = _default$1;
+	  }
 
-	var max$2 = Math.max;
-	var min = Math.min;
+	  function keyup(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope-suppressed')) {
+	        context.surface().classed('nope', true);
+	      }
 
-	var contourId = 0;
+	      context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+	    }
+	  }
 
+	  function start(d3_event, entity) {
+	    _wasMidpoint = entity.type === 'midpoint';
+	    var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
+	    _isCancelled = !context.editable() || d3_event.shiftKey || hasHidden;
 
-	function processPolygon(contourOrHole, isSubject, depth, Q, bbox, isExteriorRing) {
-	  var i, len, s1, s2, e1, e2;
-	  for (i = 0, len = contourOrHole.length - 1; i < len; i++) {
-	    s1 = contourOrHole[i];
-	    s2 = contourOrHole[i + 1];
-	    e1 = new SweepEvent(s1, false, undefined, isSubject);
-	    e2 = new SweepEvent(s2, false, e1,        isSubject);
-	    e1.otherEvent = e2;
+	    if (_isCancelled) {
+	      if (hasHidden) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
+	      }
 
-	    if (s1[0] === s2[0] && s1[1] === s2[1]) {
-	      continue; // skip collapsed edges, or it breaks
+	      return drag.cancel();
 	    }
 
-	    e1.contourId = e2.contourId = depth;
-	    if (!isExteriorRing) {
-	      e1.isExteriorRing = false;
-	      e2.isExteriorRing = false;
+	    if (_wasMidpoint) {
+	      var midpoint = entity;
+	      entity = osmNode();
+	      context.perform(actionAddMidpoint(midpoint, entity));
+	      entity = context.entity(entity.id); // get post-action entity
+
+	      var vertex = context.surface().selectAll('.' + entity.id);
+	      drag.targetNode(vertex.node()).targetEntity(entity);
+	    } else {
+	      context.perform(actionNoop());
 	    }
-	    if (compareEvents(e1, e2) > 0) {
-	      e2.left = true;
+
+	    _activeEntity = entity;
+	    _startLoc = entity.loc;
+	    hover.ignoreVertex(entity.geometry(context.graph()) === 'vertex');
+	    context.surface().selectAll('.' + _activeEntity.id).classed('active', true);
+	    context.enter(mode);
+	  } // related code
+	  // - `behavior/draw.js` `datum()`
+
+
+	  function datum(d3_event) {
+	    if (!d3_event || d3_event.altKey) {
+	      return {};
 	    } else {
-	      e1.left = true;
+	      // When dragging, snap only to touch targets..
+	      // (this excludes area fills and active drawing elements)
+	      var d = d3_event.target.__data__;
+	      return d && d.properties && d.properties.target ? d : {};
+	    }
+	  }
+
+	  function doMove(d3_event, entity, nudge) {
+	    nudge = nudge || [0, 0];
+	    var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
+	    var currMouse = geoVecSubtract(currPoint, nudge);
+	    var loc = context.projection.invert(currMouse);
+	    var target, edge;
+
+	    if (!_nudgeInterval) {
+	      // If not nudging at the edge of the viewport, try to snap..
+	      // related code
+	      // - `mode/drag_node.js`     `doMove()`
+	      // - `behavior/draw.js`      `click()`
+	      // - `behavior/draw_way.js`  `move()`
+	      var d = datum(d3_event);
+	      target = d && d.properties && d.properties.entity;
+	      var targetLoc = target && target.loc;
+	      var targetNodes = d && d.properties && d.properties.nodes;
+
+	      if (targetLoc) {
+	        // snap to node/vertex - a point target with `.loc`
+	        if (shouldSnapToNode(target)) {
+	          loc = targetLoc;
+	        }
+	      } else if (targetNodes) {
+	        // snap to way - a line target with `.nodes`
+	        edge = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, end.id);
+
+	        if (edge) {
+	          loc = edge.loc;
+	        }
+	      }
 	    }
 
-	    var x = s1[0], y = s1[1];
-	    bbox[0] = min(bbox[0], x);
-	    bbox[1] = min(bbox[1], y);
-	    bbox[2] = max$2(bbox[2], x);
-	    bbox[3] = max$2(bbox[3], y);
+	    context.replace(actionMoveNode(entity.id, loc)); // Below here: validations
 
-	    // Pushing it so the queue is sorted from left to right,
-	    // with object on the left having the highest priority.
-	    Q.push(e1);
-	    Q.push(e2);
-	  }
-	}
+	    var isInvalid = false; // Check if this connection to `target` could cause relations to break..
 
+	    if (target) {
+	      isInvalid = hasRelationConflict(entity, target, edge, context.graph());
+	    } // Check if this drag causes the geometry to break..
 
-	function fillQueue(subject, clipping, sbbox, cbbox, operation) {
-	  var eventQueue = new tinyqueue(null, compareEvents);
-	  var polygonSet, isExteriorRing, i, ii, j, jj; //, k, kk;
 
-	  for (i = 0, ii = subject.length; i < ii; i++) {
-	    polygonSet = subject[i];
-	    for (j = 0, jj = polygonSet.length; j < jj; j++) {
-	      isExteriorRing = j === 0;
-	      if (isExteriorRing) { contourId++; }
-	      processPolygon(polygonSet[j], true, contourId, eventQueue, sbbox, isExteriorRing);
+	    if (!isInvalid) {
+	      isInvalid = hasInvalidGeometry(entity, context.graph());
 	    }
-	  }
 
-	  for (i = 0, ii = clipping.length; i < ii; i++) {
-	    polygonSet = clipping[i];
-	    for (j = 0, jj = polygonSet.length; j < jj; j++) {
-	      isExteriorRing = j === 0;
-	      if (operation === DIFFERENCE) { isExteriorRing = false; }
-	      if (isExteriorRing) { contourId++; }
-	      processPolygon(polygonSet[j], false, contourId, eventQueue, cbbox, isExteriorRing);
+	    var nope = context.surface().classed('nope');
+
+	    if (isInvalid === 'relation' || isInvalid === 'restriction') {
+	      if (!nope) {
+	        // about to nope - show hint
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('operations.connect.' + isInvalid, {
+	          relation: _mainPresetIndex.item('type/restriction').name()
+	        }))();
+	      }
+	    } else if (isInvalid) {
+	      var errorID = isInvalid === 'line' ? 'lines' : 'areas';
+	      context.ui().flash.duration(3000).iconName('#iD-icon-no').label(_t('self_intersection.error.' + errorID))();
+	    } else {
+	      if (nope) {
+	        // about to un-nope, remove hint
+	        context.ui().flash.duration(1).label('')();
+	      }
 	    }
-	  }
 
-	  return eventQueue;
-	}
+	    var nopeDisabled = context.surface().classed('nope-disabled');
 
-	var EMPTY = [];
+	    if (nopeDisabled) {
+	      context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+	    } else {
+	      context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+	    }
 
+	    _lastLoc = loc;
+	  } // Uses `actionConnect.disabled()` to know whether this connection is ok..
 
-	function trivialOperation(subject, clipping, operation) {
-	  var result = null;
-	  if (subject.length * clipping.length === 0) {
-	    if        (operation === INTERSECTION) {
-	      result = EMPTY;
-	    } else if (operation === DIFFERENCE) {
-	      result = subject;
-	    } else if (operation === UNION ||
-	               operation === XOR) {
-	      result = (subject.length === 0) ? clipping : subject;
-	    }
-	  }
-	  return result;
-	}
 
+	  function hasRelationConflict(entity, target, edge, graph) {
+	    var testGraph = graph.update(); // copy
+	    // if snapping to way - add midpoint there and consider that the target..
 
-	function compareBBoxes(subject, clipping, sbbox, cbbox, operation) {
-	  var result = null;
-	  if (sbbox[0] > cbbox[2] ||
-	      cbbox[0] > sbbox[2] ||
-	      sbbox[1] > cbbox[3] ||
-	      cbbox[1] > sbbox[3]) {
-	    if        (operation === INTERSECTION) {
-	      result = EMPTY;
-	    } else if (operation === DIFFERENCE) {
-	      result = subject;
-	    } else if (operation === UNION ||
-	               operation === XOR) {
-	      result = subject.concat(clipping);
-	    }
-	  }
-	  return result;
-	}
+	    if (edge) {
+	      var midpoint = osmNode();
+	      var action = actionAddMidpoint({
+	        loc: edge.loc,
+	        edge: [target.nodes[edge.index - 1], target.nodes[edge.index]]
+	      }, midpoint);
+	      testGraph = action(testGraph);
+	      target = midpoint;
+	    } // can we connect to it?
 
 
-	function boolean(subject, clipping, operation) {
-	  if (typeof subject[0][0][0] === 'number') {
-	    subject = [subject];
-	  }
-	  if (typeof clipping[0][0][0] === 'number') {
-	    clipping = [clipping];
-	  }
-	  var trivial = trivialOperation(subject, clipping, operation);
-	  if (trivial) {
-	    return trivial === EMPTY ? null : trivial;
+	    var ids = [entity.id, target.id];
+	    return actionConnect(ids).disabled(testGraph);
 	  }
-	  var sbbox = [Infinity, Infinity, -Infinity, -Infinity];
-	  var cbbox = [Infinity, Infinity, -Infinity, -Infinity];
 
-	  // console.time('fill queue');
-	  var eventQueue = fillQueue(subject, clipping, sbbox, cbbox, operation);
-	  //console.timeEnd('fill queue');
+	  function hasInvalidGeometry(entity, graph) {
+	    var parents = graph.parentWays(entity);
+	    var i, j, k;
 
-	  trivial = compareBBoxes(subject, clipping, sbbox, cbbox, operation);
-	  if (trivial) {
-	    return trivial === EMPTY ? null : trivial;
-	  }
-	  // console.time('subdivide edges');
-	  var sortedEvents = subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation);
-	  //console.timeEnd('subdivide edges');
+	    for (i = 0; i < parents.length; i++) {
+	      var parent = parents[i];
+	      var nodes = [];
+	      var activeIndex = null; // which multipolygon ring contains node being dragged
+	      // test any parent multipolygons for valid geometry
 
-	  // console.time('connect vertices');
-	  var contours = connectEdges(sortedEvents);
-	  //console.timeEnd('connect vertices');
+	      var relations = graph.parentRelations(parent);
 
-	  // Convert contours to polygons
-	  var polygons = [];
-	  for (var i = 0; i < contours.length; i++) {
-	    var contour = contours[i];
-	    if (contour.isExterior()) {
-	      // The exterior ring goes first
-	      var rings = [contour.points];
-	      // Followed by holes if any
-	      for (var j = 0; j < contour.holeIds.length; j++) {
-	        var holeId = contour.holeIds[j];
-	        rings.push(contours[holeId].points);
-	      }
-	      polygons.push(rings);
-	    }
-	  }
+	      for (j = 0; j < relations.length; j++) {
+	        if (!relations[j].isMultipolygon()) continue;
+	        var rings = osmJoinWays(relations[j].members, graph); // find active ring and test it for self intersections
 
-	  return polygons;
-	}
+	        for (k = 0; k < rings.length; k++) {
+	          nodes = rings[k].nodes;
 
-	function union (subject, clipping) {
-	  return boolean(subject, clipping, UNION);
-	}
+	          if (nodes.find(function (n) {
+	            return n.id === entity.id;
+	          })) {
+	            activeIndex = k;
 
-	var read$6 = function (buffer, offset, isLE, mLen, nBytes) {
-	  var e, m;
-	  var eLen = (nBytes * 8) - mLen - 1;
-	  var eMax = (1 << eLen) - 1;
-	  var eBias = eMax >> 1;
-	  var nBits = -7;
-	  var i = isLE ? (nBytes - 1) : 0;
-	  var d = isLE ? -1 : 1;
-	  var s = buffer[offset + i];
+	            if (geoHasSelfIntersections(nodes, entity.id)) {
+	              return 'multipolygonMember';
+	            }
+	          }
 
-	  i += d;
+	          rings[k].coords = nodes.map(function (n) {
+	            return n.loc;
+	          });
+	        } // test active ring for intersections with other rings in the multipolygon
 
-	  e = s & ((1 << (-nBits)) - 1);
-	  s >>= (-nBits);
-	  nBits += eLen;
-	  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
 
-	  m = e & ((1 << (-nBits)) - 1);
-	  e >>= (-nBits);
-	  nBits += mLen;
-	  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+	        for (k = 0; k < rings.length; k++) {
+	          if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings
 
-	  if (e === 0) {
-	    e = 1 - eBias;
-	  } else if (e === eMax) {
-	    return m ? NaN : ((s ? -1 : 1) * Infinity)
-	  } else {
-	    m = m + Math.pow(2, mLen);
-	    e = e - eBias;
-	  }
-	  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
-	};
+	          if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
+	            return 'multipolygonRing';
+	          }
+	        }
+	      } // If we still haven't tested this node's parent way for self-intersections.
+	      // (because it's not a member of a multipolygon), test it now.
 
-	var write$6 = function (buffer, value, offset, isLE, mLen, nBytes) {
-	  var e, m, c;
-	  var eLen = (nBytes * 8) - mLen - 1;
-	  var eMax = (1 << eLen) - 1;
-	  var eBias = eMax >> 1;
-	  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0);
-	  var i = isLE ? 0 : (nBytes - 1);
-	  var d = isLE ? 1 : -1;
-	  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0;
 
-	  value = Math.abs(value);
+	      if (activeIndex === null) {
+	        nodes = parent.nodes.map(function (nodeID) {
+	          return graph.entity(nodeID);
+	        });
 
-	  if (isNaN(value) || value === Infinity) {
-	    m = isNaN(value) ? 1 : 0;
-	    e = eMax;
-	  } else {
-	    e = Math.floor(Math.log(value) / Math.LN2);
-	    if (value * (c = Math.pow(2, -e)) < 1) {
-	      e--;
-	      c *= 2;
+	        if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
+	          return parent.geometry(graph);
+	        }
+	      }
 	    }
-	    if (e + eBias >= 1) {
-	      value += rt / c;
+
+	    return false;
+	  }
+
+	  function move(d3_event, entity, point) {
+	    if (_isCancelled) return;
+	    d3_event.stopPropagation();
+	    context.surface().classed('nope-disabled', d3_event.altKey);
+	    _lastLoc = context.projection.invert(point);
+	    doMove(d3_event, entity);
+	    var nudge = geoViewportEdge(point, context.map().dimensions());
+
+	    if (nudge) {
+	      startNudge(d3_event, entity, nudge);
 	    } else {
-	      value += rt * Math.pow(2, 1 - eBias);
-	    }
-	    if (value * c >= 2) {
-	      e++;
-	      c /= 2;
+	      stopNudge();
+	    }
+	  }
+
+	  function end(d3_event, entity) {
+	    if (_isCancelled) return;
+	    var wasPoint = entity.geometry(context.graph()) === 'point';
+	    var d = datum(d3_event);
+	    var nope = d && d.properties && d.properties.nope || context.surface().classed('nope');
+	    var target = d && d.properties && d.properties.entity; // entity to snap to
+
+	    if (nope) {
+	      // bounce back
+	      context.perform(_actionBounceBack(entity.id, _startLoc));
+	    } else if (target && target.type === 'way') {
+	      var choice = geoChooseEdge(context.graph().childNodes(target), context.map().mouse(), context.projection, entity.id);
+	      context.replace(actionAddMidpoint({
+	        loc: choice.loc,
+	        edge: [target.nodes[choice.index - 1], target.nodes[choice.index]]
+	      }, entity), connectAnnotation(entity, target));
+	    } else if (target && target.type === 'node' && shouldSnapToNode(target)) {
+	      context.replace(actionConnect([target.id, entity.id]), connectAnnotation(entity, target));
+	    } else if (_wasMidpoint) {
+	      context.replace(actionNoop(), _t('operations.add.annotation.vertex'));
+	    } else {
+	      context.replace(actionNoop(), moveAnnotation(entity));
 	    }
 
-	    if (e + eBias >= eMax) {
-	      m = 0;
-	      e = eMax;
-	    } else if (e + eBias >= 1) {
-	      m = ((value * c) - 1) * Math.pow(2, mLen);
-	      e = e + eBias;
+	    if (wasPoint) {
+	      context.enter(modeSelect(context, [entity.id]));
 	    } else {
-	      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
-	      e = 0;
+	      var reselection = _restoreSelectedIDs.filter(function (id) {
+	        return context.graph().hasEntity(id);
+	      });
+
+	      if (reselection.length) {
+	        context.enter(modeSelect(context, reselection));
+	      } else {
+	        context.enter(modeBrowse(context));
+	      }
 	    }
 	  }
 
-	  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
+	  function _actionBounceBack(nodeID, toLoc) {
+	    var moveNode = actionMoveNode(nodeID, toLoc);
 
-	  e = (e << mLen) | m;
-	  eLen += mLen;
-	  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+	    var action = function action(graph, t) {
+	      // last time through, pop off the bounceback perform.
+	      // it will then overwrite the initial perform with a moveNode that does nothing
+	      if (t === 1) context.pop();
+	      return moveNode(graph, t);
+	    };
 
-	  buffer[offset + i - d] |= s * 128;
-	};
+	    action.transitionable = true;
+	    return action;
+	  }
 
-	var ieee754 = {
-		read: read$6,
-		write: write$6
-	};
+	  function cancel() {
+	    drag.cancel();
+	    context.enter(modeBrowse(context));
+	  }
 
-	var pbf = Pbf;
+	  var drag = behaviorDrag().selector('.layer-touch.points .target').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);
+
+	  mode.enter = function () {
+	    context.install(hover);
+	    context.install(edit);
+	    select(window).on('keydown.dragNode', keydown).on('keyup.dragNode', keyup);
+	    context.history().on('undone.drag-node', cancel);
+	  };
 
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
+	    context.uninstall(hover);
+	    context.uninstall(edit);
+	    select(window).on('keydown.dragNode', null).on('keyup.dragNode', null);
+	    context.history().on('undone.drag-node', null);
+	    _activeEntity = null;
+	    context.surface().classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false).selectAll('.active').classed('active', false);
+	    stopNudge();
+	  };
 
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign
 
-	function Pbf(buf) {
-	    this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);
-	    this.pos = 0;
-	    this.type = 0;
-	    this.length = this.buf.length;
+	    return mode;
+	  };
+
+	  mode.activeID = function () {
+	    if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign
+
+	    return mode;
+	  };
+
+	  mode.restoreSelectedIDs = function (_) {
+	    if (!arguments.length) return _restoreSelectedIDs;
+	    _restoreSelectedIDs = _;
+	    return mode;
+	  };
+
+	  mode.behavior = drag;
+	  return mode;
 	}
 
-	Pbf.Varint  = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
-	Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
-	Pbf.Bytes   = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
-	Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
+	// Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829
+	var NON_GENERIC = !!nativePromiseConstructor && fails(function () {
+	  nativePromiseConstructor.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });
+	});
 
-	var SHIFT_LEFT_32 = (1 << 16) * (1 << 16),
-	    SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32;
+	// `Promise.prototype.finally` method
+	// https://tc39.github.io/ecma262/#sec-promise.prototype.finally
+	_export({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {
+	  'finally': function (onFinally) {
+	    var C = speciesConstructor(this, getBuiltIn('Promise'));
+	    var isFunction = typeof onFinally == 'function';
+	    return this.then(
+	      isFunction ? function (x) {
+	        return promiseResolve(C, onFinally()).then(function () { return x; });
+	      } : onFinally,
+	      isFunction ? function (e) {
+	        return promiseResolve(C, onFinally()).then(function () { throw e; });
+	      } : onFinally
+	    );
+	  }
+	});
 
-	// Threshold chosen based on both benchmarking and knowledge about browser string
-	// data structures (which currently switch structure types at 12 bytes or more)
-	var TEXT_DECODER_MIN_LENGTH = 12;
-	var utf8TextDecoder = typeof TextDecoder === 'undefined' ? null : new TextDecoder('utf8');
+	// patch native Promise.prototype for native async functions
+	if ( typeof nativePromiseConstructor == 'function' && !nativePromiseConstructor.prototype['finally']) {
+	  redefine(nativePromiseConstructor.prototype, 'finally', getBuiltIn('Promise').prototype['finally']);
+	}
+
+	// @@search logic
+	fixRegexpWellKnownSymbolLogic('search', 1, function (SEARCH, nativeSearch, maybeCallNative) {
+	  return [
+	    // `String.prototype.search` method
+	    // https://tc39.github.io/ecma262/#sec-string.prototype.search
+	    function search(regexp) {
+	      var O = requireObjectCoercible(this);
+	      var searcher = regexp == undefined ? undefined : regexp[SEARCH];
+	      return searcher !== undefined ? searcher.call(regexp, O) : new RegExp(regexp)[SEARCH](String(O));
+	    },
+	    // `RegExp.prototype[@@search]` method
+	    // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@search
+	    function (regexp) {
+	      var res = maybeCallNative(nativeSearch, regexp, this);
+	      if (res.done) return res.value;
+
+	      var rx = anObject(regexp);
+	      var S = String(this);
+
+	      var previousLastIndex = rx.lastIndex;
+	      if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;
+	      var result = regexpExecAbstract(rx, S);
+	      if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;
+	      return result === null ? -1 : result.index;
+	    }
+	  ];
+	});
+
+	function quickselect$1(arr, k, left, right, compare) {
+	  quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+	}
+
+	function quickselectStep(arr, k, left, right, compare) {
+	  while (right > left) {
+	    if (right - left > 600) {
+	      var n = right - left + 1;
+	      var m = k - left + 1;
+	      var z = Math.log(n);
+	      var s = 0.5 * Math.exp(2 * z / 3);
+	      var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+	      var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+	      var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+	      quickselectStep(arr, k, newLeft, newRight, compare);
+	    }
+
+	    var t = arr[k];
+	    var i = left;
+	    var j = right;
+	    swap$1(arr, left, k);
+	    if (compare(arr[right], t) > 0) swap$1(arr, left, right);
+
+	    while (i < j) {
+	      swap$1(arr, i, j);
+	      i++;
+	      j--;
+
+	      while (compare(arr[i], t) < 0) {
+	        i++;
+	      }
+
+	      while (compare(arr[j], t) > 0) {
+	        j--;
+	      }
+	    }
+
+	    if (compare(arr[left], t) === 0) swap$1(arr, left, j);else {
+	      j++;
+	      swap$1(arr, j, right);
+	    }
+	    if (j <= k) left = j + 1;
+	    if (k <= j) right = j - 1;
+	  }
+	}
 
-	Pbf.prototype = {
+	function swap$1(arr, i, j) {
+	  var tmp = arr[i];
+	  arr[i] = arr[j];
+	  arr[j] = tmp;
+	}
 
-	    destroy: function() {
-	        this.buf = null;
-	    },
+	function defaultCompare(a, b) {
+	  return a < b ? -1 : a > b ? 1 : 0;
+	}
 
-	    // === READING =================================================================
+	var RBush = /*#__PURE__*/function () {
+	  function RBush() {
+	    var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;
 
-	    readFields: function(readField, result, end) {
-	        end = end || this.length;
+	    _classCallCheck(this, RBush);
 
-	        while (this.pos < end) {
-	            var val = this.readVarint(),
-	                tag = val >> 3,
-	                startPos = this.pos;
+	    // max entries in a node is 9 by default; min node fill is 40% for best performance
+	    this._maxEntries = Math.max(4, maxEntries);
+	    this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
+	    this.clear();
+	  }
 
-	            this.type = val & 0x7;
-	            readField(tag, result, this);
+	  _createClass(RBush, [{
+	    key: "all",
+	    value: function all() {
+	      return this._all(this.data, []);
+	    }
+	  }, {
+	    key: "search",
+	    value: function search(bbox) {
+	      var node = this.data;
+	      var result = [];
+	      if (!intersects(bbox, node)) return result;
+	      var toBBox = this.toBBox;
+	      var nodesToSearch = [];
+
+	      while (node) {
+	        for (var i = 0; i < node.children.length; i++) {
+	          var child = node.children[i];
+	          var childBBox = node.leaf ? toBBox(child) : child;
 
-	            if (this.pos === startPos) { this.skip(val); }
+	          if (intersects(bbox, childBBox)) {
+	            if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
+	          }
 	        }
-	        return result;
-	    },
 
-	    readMessage: function(readField, result) {
-	        return this.readFields(readField, result, this.readVarint() + this.pos);
-	    },
+	        node = nodesToSearch.pop();
+	      }
 
-	    readFixed32: function() {
-	        var val = readUInt32(this.buf, this.pos);
-	        this.pos += 4;
-	        return val;
-	    },
+	      return result;
+	    }
+	  }, {
+	    key: "collides",
+	    value: function collides(bbox) {
+	      var node = this.data;
+	      if (!intersects(bbox, node)) return false;
+	      var nodesToSearch = [];
 
-	    readSFixed32: function() {
-	        var val = readInt32(this.buf, this.pos);
-	        this.pos += 4;
-	        return val;
-	    },
+	      while (node) {
+	        for (var i = 0; i < node.children.length; i++) {
+	          var child = node.children[i];
+	          var childBBox = node.leaf ? this.toBBox(child) : child;
 
-	    // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
+	          if (intersects(bbox, childBBox)) {
+	            if (node.leaf || contains(bbox, childBBox)) return true;
+	            nodesToSearch.push(child);
+	          }
+	        }
 
-	    readFixed64: function() {
-	        var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
-	        this.pos += 8;
-	        return val;
-	    },
+	        node = nodesToSearch.pop();
+	      }
 
-	    readSFixed64: function() {
-	        var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
-	        this.pos += 8;
-	        return val;
-	    },
+	      return false;
+	    }
+	  }, {
+	    key: "load",
+	    value: function load(data) {
+	      if (!(data && data.length)) return this;
 
-	    readFloat: function() {
-	        var val = ieee754.read(this.buf, this.pos, true, 23, 4);
-	        this.pos += 4;
-	        return val;
-	    },
+	      if (data.length < this._minEntries) {
+	        for (var i = 0; i < data.length; i++) {
+	          this.insert(data[i]);
+	        }
 
-	    readDouble: function() {
-	        var val = ieee754.read(this.buf, this.pos, true, 52, 8);
-	        this.pos += 8;
-	        return val;
-	    },
+	        return this;
+	      } // recursively build the tree with the given data from scratch using OMT algorithm
 
-	    readVarint: function(isSigned) {
-	        var buf = this.buf,
-	            val, b;
 
-	        b = buf[this.pos++]; val  =  b & 0x7f;        if (b < 0x80) { return val; }
-	        b = buf[this.pos++]; val |= (b & 0x7f) << 7;  if (b < 0x80) { return val; }
-	        b = buf[this.pos++]; val |= (b & 0x7f) << 14; if (b < 0x80) { return val; }
-	        b = buf[this.pos++]; val |= (b & 0x7f) << 21; if (b < 0x80) { return val; }
-	        b = buf[this.pos];   val |= (b & 0x0f) << 28;
+	      var node = this._build(data.slice(), 0, data.length - 1, 0);
 
-	        return readVarintRemainder(val, isSigned, this);
-	    },
+	      if (!this.data.children.length) {
+	        // save as is if tree is empty
+	        this.data = node;
+	      } else if (this.data.height === node.height) {
+	        // split root if trees have the same height
+	        this._splitRoot(this.data, node);
+	      } else {
+	        if (this.data.height < node.height) {
+	          // swap trees if inserted one is bigger
+	          var tmpNode = this.data;
+	          this.data = node;
+	          node = tmpNode;
+	        } // insert the small tree into the large tree at appropriate level
 
-	    readVarint64: function() { // for compatibility with v2.0.1
-	        return this.readVarint(true);
-	    },
 
-	    readSVarint: function() {
-	        var num = this.readVarint();
-	        return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
-	    },
+	        this._insert(node, this.data.height - node.height - 1, true);
+	      }
 
-	    readBoolean: function() {
-	        return Boolean(this.readVarint());
-	    },
+	      return this;
+	    }
+	  }, {
+	    key: "insert",
+	    value: function insert(item) {
+	      if (item) this._insert(item, this.data.height - 1);
+	      return this;
+	    }
+	  }, {
+	    key: "clear",
+	    value: function clear() {
+	      this.data = createNode([]);
+	      return this;
+	    }
+	  }, {
+	    key: "remove",
+	    value: function remove(item, equalsFn) {
+	      if (!item) return this;
+	      var node = this.data;
+	      var bbox = this.toBBox(item);
+	      var path = [];
+	      var indexes = [];
+	      var i, parent, goingUp; // depth-first iterative tree traversal
+
+	      while (node || path.length) {
+	        if (!node) {
+	          // go up
+	          node = path.pop();
+	          parent = path[path.length - 1];
+	          i = indexes.pop();
+	          goingUp = true;
+	        }
+
+	        if (node.leaf) {
+	          // check current node
+	          var index = findItem(item, node.children, equalsFn);
+
+	          if (index !== -1) {
+	            // item found, remove the item and condense tree upwards
+	            node.children.splice(index, 1);
+	            path.push(node);
 
-	    readString: function() {
-	        var end = this.readVarint() + this.pos;
-	        var pos = this.pos;
-	        this.pos = end;
+	            this._condense(path);
 
-	        if (end - pos >= TEXT_DECODER_MIN_LENGTH && utf8TextDecoder) {
-	            // longer strings are fast with the built-in browser TextDecoder API
-	            return readUtf8TextDecoder(this.buf, pos, end);
+	            return this;
+	          }
 	        }
-	        // short strings are fast with our custom implementation
-	        return readUtf8(this.buf, pos, end);
-	    },
 
-	    readBytes: function() {
-	        var end = this.readVarint() + this.pos,
-	            buffer = this.buf.subarray(this.pos, end);
-	        this.pos = end;
-	        return buffer;
-	    },
+	        if (!goingUp && !node.leaf && contains(node, bbox)) {
+	          // go down
+	          path.push(node);
+	          indexes.push(i);
+	          i = 0;
+	          parent = node;
+	          node = node.children[0];
+	        } else if (parent) {
+	          // go right
+	          i++;
+	          node = parent.children[i];
+	          goingUp = false;
+	        } else node = null; // nothing found
 
-	    // verbose for performance reasons; doesn't affect gzipped size
+	      }
 
-	    readPackedVarint: function(arr, isSigned) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readVarint(isSigned)); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readVarint(isSigned)); }
-	        return arr;
-	    },
-	    readPackedSVarint: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readSVarint()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readSVarint()); }
-	        return arr;
-	    },
-	    readPackedBoolean: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readBoolean()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readBoolean()); }
-	        return arr;
-	    },
-	    readPackedFloat: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readFloat()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readFloat()); }
-	        return arr;
-	    },
-	    readPackedDouble: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readDouble()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readDouble()); }
-	        return arr;
-	    },
-	    readPackedFixed32: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readFixed32()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readFixed32()); }
-	        return arr;
-	    },
-	    readPackedSFixed32: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readSFixed32()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readSFixed32()); }
-	        return arr;
-	    },
-	    readPackedFixed64: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readFixed64()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readFixed64()); }
-	        return arr;
-	    },
-	    readPackedSFixed64: function(arr) {
-	        if (this.type !== Pbf.Bytes) { return arr.push(this.readSFixed64()); }
-	        var end = readPackedEnd(this);
-	        arr = arr || [];
-	        while (this.pos < end) { arr.push(this.readSFixed64()); }
-	        return arr;
-	    },
+	      return this;
+	    }
+	  }, {
+	    key: "toBBox",
+	    value: function toBBox(item) {
+	      return item;
+	    }
+	  }, {
+	    key: "compareMinX",
+	    value: function compareMinX(a, b) {
+	      return a.minX - b.minX;
+	    }
+	  }, {
+	    key: "compareMinY",
+	    value: function compareMinY(a, b) {
+	      return a.minY - b.minY;
+	    }
+	  }, {
+	    key: "toJSON",
+	    value: function toJSON() {
+	      return this.data;
+	    }
+	  }, {
+	    key: "fromJSON",
+	    value: function fromJSON(data) {
+	      this.data = data;
+	      return this;
+	    }
+	  }, {
+	    key: "_all",
+	    value: function _all(node, result) {
+	      var nodesToSearch = [];
 
-	    skip: function(val) {
-	        var type = val & 0x7;
-	        if (type === Pbf.Varint) { while (this.buf[this.pos++] > 0x7f) {} }
-	        else if (type === Pbf.Bytes) { this.pos = this.readVarint() + this.pos; }
-	        else if (type === Pbf.Fixed32) { this.pos += 4; }
-	        else if (type === Pbf.Fixed64) { this.pos += 8; }
-	        else { throw new Error('Unimplemented type: ' + type); }
-	    },
+	      while (node) {
+	        if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
+	        node = nodesToSearch.pop();
+	      }
 
-	    // === WRITING =================================================================
+	      return result;
+	    }
+	  }, {
+	    key: "_build",
+	    value: function _build(items, left, right, height) {
+	      var N = right - left + 1;
+	      var M = this._maxEntries;
+	      var node;
 
-	    writeTag: function(tag, type) {
-	        this.writeVarint((tag << 3) | type);
-	    },
+	      if (N <= M) {
+	        // reached leaf level; return leaf
+	        node = createNode(items.slice(left, right + 1));
+	        calcBBox(node, this.toBBox);
+	        return node;
+	      }
 
-	    realloc: function(min) {
-	        var length = this.length || 16;
+	      if (!height) {
+	        // target height of the bulk-loaded tree
+	        height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization
 
-	        while (length < this.pos + min) { length *= 2; }
+	        M = Math.ceil(N / Math.pow(M, height - 1));
+	      }
 
-	        if (length !== this.length) {
-	            var buf = new Uint8Array(length);
-	            buf.set(this.buf);
-	            this.buf = buf;
-	            this.length = length;
-	        }
-	    },
+	      node = createNode([]);
+	      node.leaf = false;
+	      node.height = height; // split the items into M mostly square tiles
 
-	    finish: function() {
-	        this.length = this.pos;
-	        this.pos = 0;
-	        return this.buf.subarray(0, this.length);
-	    },
+	      var N2 = Math.ceil(N / M);
+	      var N1 = N2 * Math.ceil(Math.sqrt(M));
+	      multiSelect(items, left, right, N1, this.compareMinX);
 
-	    writeFixed32: function(val) {
-	        this.realloc(4);
-	        writeInt32(this.buf, val, this.pos);
-	        this.pos += 4;
-	    },
+	      for (var i = left; i <= right; i += N1) {
+	        var right2 = Math.min(i + N1 - 1, right);
+	        multiSelect(items, i, right2, N2, this.compareMinY);
 
-	    writeSFixed32: function(val) {
-	        this.realloc(4);
-	        writeInt32(this.buf, val, this.pos);
-	        this.pos += 4;
-	    },
+	        for (var j = i; j <= right2; j += N2) {
+	          var right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
-	    writeFixed64: function(val) {
-	        this.realloc(8);
-	        writeInt32(this.buf, val & -1, this.pos);
-	        writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
-	        this.pos += 8;
-	    },
+	          node.children.push(this._build(items, j, right3, height - 1));
+	        }
+	      }
 
-	    writeSFixed64: function(val) {
-	        this.realloc(8);
-	        writeInt32(this.buf, val & -1, this.pos);
-	        writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
-	        this.pos += 8;
-	    },
+	      calcBBox(node, this.toBBox);
+	      return node;
+	    }
+	  }, {
+	    key: "_chooseSubtree",
+	    value: function _chooseSubtree(bbox, node, level, path) {
+	      while (true) {
+	        path.push(node);
+	        if (node.leaf || path.length - 1 === level) break;
+	        var minArea = Infinity;
+	        var minEnlargement = Infinity;
+	        var targetNode = void 0;
 
-	    writeVarint: function(val) {
-	        val = +val || 0;
+	        for (var i = 0; i < node.children.length; i++) {
+	          var child = node.children[i];
+	          var area = bboxArea(child);
+	          var enlargement = enlargedArea(bbox, child) - area; // choose entry with the least area enlargement
 
-	        if (val > 0xfffffff || val < 0) {
-	            writeBigVarint(val, this);
-	            return;
+	          if (enlargement < minEnlargement) {
+	            minEnlargement = enlargement;
+	            minArea = area < minArea ? area : minArea;
+	            targetNode = child;
+	          } else if (enlargement === minEnlargement) {
+	            // otherwise choose one with the smallest area
+	            if (area < minArea) {
+	              minArea = area;
+	              targetNode = child;
+	            }
+	          }
 	        }
 
-	        this.realloc(4);
+	        node = targetNode || node.children[0];
+	      }
 
-	        this.buf[this.pos++] =           val & 0x7f  | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) { return; }
-	        this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) { return; }
-	        this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) { return; }
-	        this.buf[this.pos++] =   (val >>> 7) & 0x7f;
-	    },
+	      return node;
+	    }
+	  }, {
+	    key: "_insert",
+	    value: function _insert(item, level, isNode) {
+	      var bbox = isNode ? item : this.toBBox(item);
+	      var insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too
 
-	    writeSVarint: function(val) {
-	        this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
-	    },
+	      var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
-	    writeBoolean: function(val) {
-	        this.writeVarint(Boolean(val));
-	    },
 
-	    writeString: function(str) {
-	        str = String(str);
-	        this.realloc(str.length * 4);
+	      node.children.push(item);
+	      extend$1(node, bbox); // split on node overflow; propagate upwards if necessary
 
-	        this.pos++; // reserve 1 byte for short string length
+	      while (level >= 0) {
+	        if (insertPath[level].children.length > this._maxEntries) {
+	          this._split(insertPath, level);
 
-	        var startPos = this.pos;
-	        // write the string directly to the buffer and see how much was written
-	        this.pos = writeUtf8(this.buf, str, this.pos);
-	        var len = this.pos - startPos;
+	          level--;
+	        } else break;
+	      } // adjust bboxes along the insertion path
 
-	        if (len >= 0x80) { makeRoomForExtraLength(startPos, len, this); }
 
-	        // finally, write the message length in the reserved place and restore the position
-	        this.pos = startPos - 1;
-	        this.writeVarint(len);
-	        this.pos += len;
-	    },
+	      this._adjustParentBBoxes(bbox, insertPath, level);
+	    } // split overflowed node into two
 
-	    writeFloat: function(val) {
-	        this.realloc(4);
-	        ieee754.write(this.buf, val, this.pos, true, 23, 4);
-	        this.pos += 4;
-	    },
+	  }, {
+	    key: "_split",
+	    value: function _split(insertPath, level) {
+	      var node = insertPath[level];
+	      var M = node.children.length;
+	      var m = this._minEntries;
 
-	    writeDouble: function(val) {
-	        this.realloc(8);
-	        ieee754.write(this.buf, val, this.pos, true, 52, 8);
-	        this.pos += 8;
-	    },
+	      this._chooseSplitAxis(node, m, M);
 
-	    writeBytes: function(buffer) {
-	        var len = buffer.length;
-	        this.writeVarint(len);
-	        this.realloc(len);
-	        for (var i = 0; i < len; i++) { this.buf[this.pos++] = buffer[i]; }
-	    },
+	      var splitIndex = this._chooseSplitIndex(node, m, M);
+
+	      var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
+	      newNode.height = node.height;
+	      newNode.leaf = node.leaf;
+	      calcBBox(node, this.toBBox);
+	      calcBBox(newNode, this.toBBox);
+	      if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
+	    }
+	  }, {
+	    key: "_splitRoot",
+	    value: function _splitRoot(node, newNode) {
+	      // split root node
+	      this.data = createNode([node, newNode]);
+	      this.data.height = node.height + 1;
+	      this.data.leaf = false;
+	      calcBBox(this.data, this.toBBox);
+	    }
+	  }, {
+	    key: "_chooseSplitIndex",
+	    value: function _chooseSplitIndex(node, m, M) {
+	      var index;
+	      var minOverlap = Infinity;
+	      var minArea = Infinity;
 
-	    writeRawMessage: function(fn, obj) {
-	        this.pos++; // reserve 1 byte for short message length
+	      for (var i = m; i <= M - m; i++) {
+	        var bbox1 = distBBox(node, 0, i, this.toBBox);
+	        var bbox2 = distBBox(node, i, M, this.toBBox);
+	        var overlap = intersectionArea(bbox1, bbox2);
+	        var area = bboxArea(bbox1) + bboxArea(bbox2); // choose distribution with minimum overlap
 
-	        // write the message directly to the buffer and see how much was written
-	        var startPos = this.pos;
-	        fn(obj, this);
-	        var len = this.pos - startPos;
+	        if (overlap < minOverlap) {
+	          minOverlap = overlap;
+	          index = i;
+	          minArea = area < minArea ? area : minArea;
+	        } else if (overlap === minOverlap) {
+	          // otherwise choose distribution with minimum area
+	          if (area < minArea) {
+	            minArea = area;
+	            index = i;
+	          }
+	        }
+	      }
 
-	        if (len >= 0x80) { makeRoomForExtraLength(startPos, len, this); }
+	      return index || M - m;
+	    } // sorts node children by the best axis for split
 
-	        // finally, write the message length in the reserved place and restore the position
-	        this.pos = startPos - 1;
-	        this.writeVarint(len);
-	        this.pos += len;
-	    },
+	  }, {
+	    key: "_chooseSplitAxis",
+	    value: function _chooseSplitAxis(node, m, M) {
+	      var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
+	      var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
 
-	    writeMessage: function(tag, fn, obj) {
-	        this.writeTag(tag, Pbf.Bytes);
-	        this.writeRawMessage(fn, obj);
-	    },
+	      var xMargin = this._allDistMargin(node, m, M, compareMinX);
 
-	    writePackedVarint:   function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedVarint, arr); }   },
-	    writePackedSVarint:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedSVarint, arr); }  },
-	    writePackedBoolean:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedBoolean, arr); }  },
-	    writePackedFloat:    function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedFloat, arr); }    },
-	    writePackedDouble:   function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedDouble, arr); }   },
-	    writePackedFixed32:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedFixed32, arr); }  },
-	    writePackedSFixed32: function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedSFixed32, arr); } },
-	    writePackedFixed64:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedFixed64, arr); }  },
-	    writePackedSFixed64: function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedSFixed64, arr); } },
-
-	    writeBytesField: function(tag, buffer) {
-	        this.writeTag(tag, Pbf.Bytes);
-	        this.writeBytes(buffer);
-	    },
-	    writeFixed32Field: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed32);
-	        this.writeFixed32(val);
-	    },
-	    writeSFixed32Field: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed32);
-	        this.writeSFixed32(val);
-	    },
-	    writeFixed64Field: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed64);
-	        this.writeFixed64(val);
-	    },
-	    writeSFixed64Field: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed64);
-	        this.writeSFixed64(val);
-	    },
-	    writeVarintField: function(tag, val) {
-	        this.writeTag(tag, Pbf.Varint);
-	        this.writeVarint(val);
-	    },
-	    writeSVarintField: function(tag, val) {
-	        this.writeTag(tag, Pbf.Varint);
-	        this.writeSVarint(val);
-	    },
-	    writeStringField: function(tag, str) {
-	        this.writeTag(tag, Pbf.Bytes);
-	        this.writeString(str);
-	    },
-	    writeFloatField: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed32);
-	        this.writeFloat(val);
-	    },
-	    writeDoubleField: function(tag, val) {
-	        this.writeTag(tag, Pbf.Fixed64);
-	        this.writeDouble(val);
-	    },
-	    writeBooleanField: function(tag, val) {
-	        this.writeVarintField(tag, Boolean(val));
-	    }
-	};
+	      var yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
+	      // otherwise it's already sorted by minY
 
-	function readVarintRemainder(l, s, p) {
-	    var buf = p.buf,
-	        h, b;
 
-	    b = buf[p.pos++]; h  = (b & 0x70) >> 4;  if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x7f) << 3;  if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x7f) << 10; if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x7f) << 17; if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x7f) << 24; if (b < 0x80) { return toNum(l, h, s); }
-	    b = buf[p.pos++]; h |= (b & 0x01) << 31; if (b < 0x80) { return toNum(l, h, s); }
+	      if (xMargin < yMargin) node.children.sort(compareMinX);
+	    } // total margin of all possible split distributions where each node is at least m full
 
-	    throw new Error('Expected varint not more than 10 bytes');
-	}
+	  }, {
+	    key: "_allDistMargin",
+	    value: function _allDistMargin(node, m, M, compare) {
+	      node.children.sort(compare);
+	      var toBBox = this.toBBox;
+	      var leftBBox = distBBox(node, 0, m, toBBox);
+	      var rightBBox = distBBox(node, M - m, M, toBBox);
+	      var margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);
+
+	      for (var i = m; i < M - m; i++) {
+	        var child = node.children[i];
+	        extend$1(leftBBox, node.leaf ? toBBox(child) : child);
+	        margin += bboxMargin(leftBBox);
+	      }
 
-	function readPackedEnd(pbf) {
-	    return pbf.type === Pbf.Bytes ?
-	        pbf.readVarint() + pbf.pos : pbf.pos + 1;
-	}
+	      for (var _i = M - m - 1; _i >= m; _i--) {
+	        var _child = node.children[_i];
+	        extend$1(rightBBox, node.leaf ? toBBox(_child) : _child);
+	        margin += bboxMargin(rightBBox);
+	      }
 
-	function toNum(low, high, isSigned) {
-	    if (isSigned) {
-	        return high * 0x100000000 + (low >>> 0);
+	      return margin;
+	    }
+	  }, {
+	    key: "_adjustParentBBoxes",
+	    value: function _adjustParentBBoxes(bbox, path, level) {
+	      // adjust bboxes along the given tree path
+	      for (var i = level; i >= 0; i--) {
+	        extend$1(path[i], bbox);
+	      }
+	    }
+	  }, {
+	    key: "_condense",
+	    value: function _condense(path) {
+	      // go through the path, removing empty nodes and updating bboxes
+	      for (var i = path.length - 1, siblings; i >= 0; i--) {
+	        if (path[i].children.length === 0) {
+	          if (i > 0) {
+	            siblings = path[i - 1].children;
+	            siblings.splice(siblings.indexOf(path[i]), 1);
+	          } else this.clear();
+	        } else calcBBox(path[i], this.toBBox);
+	      }
 	    }
+	  }]);
 
-	    return ((high >>> 0) * 0x100000000) + (low >>> 0);
-	}
+	  return RBush;
+	}();
 
-	function writeBigVarint(val, pbf) {
-	    var low, high;
+	function findItem(item, items, equalsFn) {
+	  if (!equalsFn) return items.indexOf(item);
 
-	    if (val >= 0) {
-	        low  = (val % 0x100000000) | 0;
-	        high = (val / 0x100000000) | 0;
-	    } else {
-	        low  = ~(-val % 0x100000000);
-	        high = ~(-val / 0x100000000);
+	  for (var i = 0; i < items.length; i++) {
+	    if (equalsFn(item, items[i])) return i;
+	  }
 
-	        if (low ^ 0xffffffff) {
-	            low = (low + 1) | 0;
-	        } else {
-	            low = 0;
-	            high = (high + 1) | 0;
-	        }
-	    }
+	  return -1;
+	} // calculate node's bbox from bboxes of its children
 
-	    if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
-	        throw new Error('Given varint doesn\'t fit into 10 bytes');
-	    }
 
-	    pbf.realloc(10);
+	function calcBBox(node, toBBox) {
+	  distBBox(node, 0, node.children.length, toBBox, node);
+	} // min bounding rectangle of node children from k to p-1
 
-	    writeBigVarintLow(low, high, pbf);
-	    writeBigVarintHigh(high, pbf);
-	}
 
-	function writeBigVarintLow(low, high, pbf) {
-	    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-	    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-	    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-	    pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-	    pbf.buf[pbf.pos]   = low & 0x7f;
-	}
+	function distBBox(node, k, p, toBBox, destNode) {
+	  if (!destNode) destNode = createNode(null);
+	  destNode.minX = Infinity;
+	  destNode.minY = Infinity;
+	  destNode.maxX = -Infinity;
+	  destNode.maxY = -Infinity;
 
-	function writeBigVarintHigh(high, pbf) {
-	    var lsb = (high & 0x07) << 4;
+	  for (var i = k; i < p; i++) {
+	    var child = node.children[i];
+	    extend$1(destNode, node.leaf ? toBBox(child) : child);
+	  }
 
-	    pbf.buf[pbf.pos++] |= lsb         | ((high >>>= 3) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-	    pbf.buf[pbf.pos++]  = high & 0x7f;
+	  return destNode;
 	}
 
-	function makeRoomForExtraLength(startPos, len, pbf) {
-	    var extraLen =
-	        len <= 0x3fff ? 1 :
-	        len <= 0x1fffff ? 2 :
-	        len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7));
+	function extend$1(a, b) {
+	  a.minX = Math.min(a.minX, b.minX);
+	  a.minY = Math.min(a.minY, b.minY);
+	  a.maxX = Math.max(a.maxX, b.maxX);
+	  a.maxY = Math.max(a.maxY, b.maxY);
+	  return a;
+	}
 
-	    // if 1 byte isn't enough for encoding message length, shift the data to the right
-	    pbf.realloc(extraLen);
-	    for (var i = pbf.pos - 1; i >= startPos; i--) { pbf.buf[i + extraLen] = pbf.buf[i]; }
+	function compareNodeMinX(a, b) {
+	  return a.minX - b.minX;
 	}
 
-	function writePackedVarint(arr, pbf)   { for (var i = 0; i < arr.length; i++) { pbf.writeVarint(arr[i]); }   }
-	function writePackedSVarint(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeSVarint(arr[i]); }  }
-	function writePackedFloat(arr, pbf)    { for (var i = 0; i < arr.length; i++) { pbf.writeFloat(arr[i]); }    }
-	function writePackedDouble(arr, pbf)   { for (var i = 0; i < arr.length; i++) { pbf.writeDouble(arr[i]); }   }
-	function writePackedBoolean(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeBoolean(arr[i]); }  }
-	function writePackedFixed32(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeFixed32(arr[i]); }  }
-	function writePackedSFixed32(arr, pbf) { for (var i = 0; i < arr.length; i++) { pbf.writeSFixed32(arr[i]); } }
-	function writePackedFixed64(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeFixed64(arr[i]); }  }
-	function writePackedSFixed64(arr, pbf) { for (var i = 0; i < arr.length; i++) { pbf.writeSFixed64(arr[i]); } }
+	function compareNodeMinY(a, b) {
+	  return a.minY - b.minY;
+	}
 
-	// Buffer code below from https://github.com/feross/buffer, MIT-licensed
+	function bboxArea(a) {
+	  return (a.maxX - a.minX) * (a.maxY - a.minY);
+	}
 
-	function readUInt32(buf, pos) {
-	    return ((buf[pos]) |
-	        (buf[pos + 1] << 8) |
-	        (buf[pos + 2] << 16)) +
-	        (buf[pos + 3] * 0x1000000);
+	function bboxMargin(a) {
+	  return a.maxX - a.minX + (a.maxY - a.minY);
 	}
 
-	function writeInt32(buf, val, pos) {
-	    buf[pos] = val;
-	    buf[pos + 1] = (val >>> 8);
-	    buf[pos + 2] = (val >>> 16);
-	    buf[pos + 3] = (val >>> 24);
+	function enlargedArea(a, b) {
+	  return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
 	}
 
-	function readInt32(buf, pos) {
-	    return ((buf[pos]) |
-	        (buf[pos + 1] << 8) |
-	        (buf[pos + 2] << 16)) +
-	        (buf[pos + 3] << 24);
+	function intersectionArea(a, b) {
+	  var minX = Math.max(a.minX, b.minX);
+	  var minY = Math.max(a.minY, b.minY);
+	  var maxX = Math.min(a.maxX, b.maxX);
+	  var maxY = Math.min(a.maxY, b.maxY);
+	  return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
 	}
 
-	function readUtf8(buf, pos, end) {
-	    var str = '';
-	    var i = pos;
+	function contains(a, b) {
+	  return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+	}
 
-	    while (i < end) {
-	        var b0 = buf[i];
-	        var c = null; // codepoint
-	        var bytesPerSequence =
-	            b0 > 0xEF ? 4 :
-	            b0 > 0xDF ? 3 :
-	            b0 > 0xBF ? 2 : 1;
+	function intersects(a, b) {
+	  return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+	}
 
-	        if (i + bytesPerSequence > end) { break; }
+	function createNode(children) {
+	  return {
+	    children: children,
+	    height: 1,
+	    leaf: true,
+	    minX: Infinity,
+	    minY: Infinity,
+	    maxX: -Infinity,
+	    maxY: -Infinity
+	  };
+	} // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
+	// combines selection algorithm with binary divide & conquer approach
 
-	        var b1, b2, b3;
 
-	        if (bytesPerSequence === 1) {
-	            if (b0 < 0x80) {
-	                c = b0;
-	            }
-	        } else if (bytesPerSequence === 2) {
-	            b1 = buf[i + 1];
-	            if ((b1 & 0xC0) === 0x80) {
-	                c = (b0 & 0x1F) << 0x6 | (b1 & 0x3F);
-	                if (c <= 0x7F) {
-	                    c = null;
-	                }
-	            }
-	        } else if (bytesPerSequence === 3) {
-	            b1 = buf[i + 1];
-	            b2 = buf[i + 2];
-	            if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
-	                c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | (b2 & 0x3F);
-	                if (c <= 0x7FF || (c >= 0xD800 && c <= 0xDFFF)) {
-	                    c = null;
-	                }
-	            }
-	        } else if (bytesPerSequence === 4) {
-	            b1 = buf[i + 1];
-	            b2 = buf[i + 2];
-	            b3 = buf[i + 3];
-	            if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
-	                c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | (b3 & 0x3F);
-	                if (c <= 0xFFFF || c >= 0x110000) {
-	                    c = null;
-	                }
-	            }
-	        }
+	function multiSelect(arr, left, right, n, compare) {
+	  var stack = [left, right];
 
-	        if (c === null) {
-	            c = 0xFFFD;
-	            bytesPerSequence = 1;
+	  while (stack.length) {
+	    right = stack.pop();
+	    left = stack.pop();
+	    if (right - left <= n) continue;
+	    var mid = left + Math.ceil((right - left) / n / 2) * n;
+	    quickselect$1(arr, mid, left, right, compare);
+	    stack.push(left, mid, mid, right);
+	  }
+	}
 
-	        } else if (c > 0xFFFF) {
-	            c -= 0x10000;
-	            str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
-	            c = 0xDC00 | c & 0x3FF;
-	        }
+	var tiler = utilTiler();
+	var dispatch$1 = dispatch('loaded');
+	var _tileZoom = 14;
+	var _krUrlRoot = 'https://www.keepright.at';
+	var _krData = {
+	  errorTypes: {},
+	  localizeStrings: {}
+	}; // This gets reassigned if reset
 
-	        str += String.fromCharCode(c);
-	        i += bytesPerSequence;
-	    }
+	var _cache;
 
-	    return str;
-	}
+	var _krRuleset = [// no 20 - multiple node on same spot - these are mostly boundaries overlapping roads
+	30, 40, 50, 60, 70, 90, 100, 110, 120, 130, 150, 160, 170, 180, 190, 191, 192, 193, 194, 195, 196, 197, 198, 200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 220, 230, 231, 232, 270, 280, 281, 282, 283, 284, 285, 290, 291, 292, 293, 294, 295, 296, 297, 298, 300, 310, 311, 312, 313, 320, 350, 360, 370, 380, 390, 400, 401, 402, 410, 411, 412, 413];
 
-	function readUtf8TextDecoder(buf, pos, end) {
-	    return utf8TextDecoder.decode(buf.subarray(pos, end));
+	function abortRequest(controller) {
+	  if (controller) {
+	    controller.abort();
+	  }
 	}
 
-	function writeUtf8(buf, str, pos) {
-	    for (var i = 0, c, lead; i < str.length; i++) {
-	        c = str.charCodeAt(i); // code point
-
-	        if (c > 0xD7FF && c < 0xE000) {
-	            if (lead) {
-	                if (c < 0xDC00) {
-	                    buf[pos++] = 0xEF;
-	                    buf[pos++] = 0xBF;
-	                    buf[pos++] = 0xBD;
-	                    lead = c;
-	                    continue;
-	                } else {
-	                    c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;
-	                    lead = null;
-	                }
-	            } else {
-	                if (c > 0xDBFF || (i + 1 === str.length)) {
-	                    buf[pos++] = 0xEF;
-	                    buf[pos++] = 0xBF;
-	                    buf[pos++] = 0xBD;
-	                } else {
-	                    lead = c;
-	                }
-	                continue;
-	            }
-	        } else if (lead) {
-	            buf[pos++] = 0xEF;
-	            buf[pos++] = 0xBF;
-	            buf[pos++] = 0xBD;
-	            lead = null;
-	        }
+	function abortUnwantedRequests(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
-	        if (c < 0x80) {
-	            buf[pos++] = c;
-	        } else {
-	            if (c < 0x800) {
-	                buf[pos++] = c >> 0x6 | 0xC0;
-	            } else {
-	                if (c < 0x10000) {
-	                    buf[pos++] = c >> 0xC | 0xE0;
-	                } else {
-	                    buf[pos++] = c >> 0x12 | 0xF0;
-	                    buf[pos++] = c >> 0xC & 0x3F | 0x80;
-	                }
-	                buf[pos++] = c >> 0x6 & 0x3F | 0x80;
-	            }
-	            buf[pos++] = c & 0x3F | 0x80;
-	        }
+	    if (!wanted) {
+	      abortRequest(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
 	    }
-	    return pos;
+	  });
 	}
 
-	var pointGeometry = Point;
+	function encodeIssueRtree(d) {
+	  return {
+	    minX: d.loc[0],
+	    minY: d.loc[1],
+	    maxX: d.loc[0],
+	    maxY: d.loc[1],
+	    data: d
+	  };
+	} // Replace or remove QAItem from rtree
 
-	/**
-	 * A standalone point geometry with useful accessor, comparison, and
-	 * modification methods.
-	 *
-	 * @class Point
-	 * @param {Number} x the x-coordinate. this could be longitude or screen
-	 * pixels, or any other sort of unit.
-	 * @param {Number} y the y-coordinate. this could be latitude or screen
-	 * pixels, or any other sort of unit.
-	 * @example
-	 * var point = new Point(-77, 38);
-	 */
-	function Point(x, y) {
-	    this.x = x;
-	    this.y = y;
+
+	function updateRtree(item, replace) {
+	  _cache.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
+
+	  if (replace) {
+	    _cache.rtree.insert(item);
+	  }
 	}
 
-	Point.prototype = {
+	function tokenReplacements(d) {
+	  if (!(d instanceof QAItem)) return;
+	  var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
+	  var replacements = {};
+	  var issueTemplate = _krData.errorTypes[d.whichType];
 
-	    /**
-	     * Clone this point, returning a new point that can be modified
-	     * without affecting the old one.
-	     * @return {Point} the clone
-	     */
-	    clone: function() { return new Point(this.x, this.y); },
+	  if (!issueTemplate) {
+	    /* eslint-disable no-console */
+	    console.log('No Template: ', d.whichType);
+	    console.log('  ', d.description);
+	    /* eslint-enable no-console */
 
-	    /**
-	     * Add this point's x & y coordinates to another point,
-	     * yielding a new point.
-	     * @param {Point} p the other point
-	     * @return {Point} output point
-	     */
-	    add:     function(p) { return this.clone()._add(p); },
+	    return;
+	  } // some descriptions are just fixed text
 
-	    /**
-	     * Subtract this point's x & y coordinates to from point,
-	     * yielding a new point.
-	     * @param {Point} p the other point
-	     * @return {Point} output point
-	     */
-	    sub:     function(p) { return this.clone()._sub(p); },
 
-	    /**
-	     * Multiply this point's x & y coordinates by point,
-	     * yielding a new point.
-	     * @param {Point} p the other point
-	     * @return {Point} output point
-	     */
-	    multByPoint:    function(p) { return this.clone()._multByPoint(p); },
+	  if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured
 
-	    /**
-	     * Divide this point's x & y coordinates by point,
-	     * yielding a new point.
-	     * @param {Point} p the other point
-	     * @return {Point} output point
-	     */
-	    divByPoint:     function(p) { return this.clone()._divByPoint(p); },
+	  var errorRegex = new RegExp(issueTemplate.regex, 'i');
+	  var errorMatch = errorRegex.exec(d.description);
 
-	    /**
-	     * Multiply this point's x & y coordinates by a factor,
-	     * yielding a new point.
-	     * @param {Point} k factor
-	     * @return {Point} output point
-	     */
-	    mult:    function(k) { return this.clone()._mult(k); },
+	  if (!errorMatch) {
+	    /* eslint-disable no-console */
+	    console.log('Unmatched: ', d.whichType);
+	    console.log('  ', d.description);
+	    console.log('  ', errorRegex);
+	    /* eslint-enable no-console */
 
-	    /**
-	     * Divide this point's x & y coordinates by a factor,
-	     * yielding a new point.
-	     * @param {Point} k factor
-	     * @return {Point} output point
-	     */
-	    div:     function(k) { return this.clone()._div(k); },
+	    return;
+	  }
 
-	    /**
-	     * Rotate this point around the 0, 0 origin by an angle a,
-	     * given in radians
-	     * @param {Number} a angle to rotate around, in radians
-	     * @return {Point} output point
-	     */
-	    rotate:  function(a) { return this.clone()._rotate(a); },
+	  for (var i = 1; i < errorMatch.length; i++) {
+	    // skip first
+	    var capture = errorMatch[i];
+	    var idType = void 0;
+	    idType = 'IDs' in issueTemplate ? issueTemplate.IDs[i - 1] : '';
 
-	    /**
-	     * Rotate this point around p point by an angle a,
-	     * given in radians
-	     * @param {Number} a angle to rotate around, in radians
-	     * @param {Point} p Point to rotate around
-	     * @return {Point} output point
-	     */
-	    rotateAround:  function(a,p) { return this.clone()._rotateAround(a,p); },
+	    if (idType && capture) {
+	      // link IDs if present in the capture
+	      capture = parseError(capture, idType);
+	    } else if (htmlRegex.test(capture)) {
+	      // escape any html in non-IDs
+	      capture = '\\' + capture + '\\';
+	    } else {
+	      var compare = capture.toLowerCase();
 
-	    /**
-	     * Multiply this point by a 4x1 transformation matrix
-	     * @param {Array<Number>} m transformation matrix
-	     * @return {Point} output point
-	     */
-	    matMult: function(m) { return this.clone()._matMult(m); },
+	      if (_krData.localizeStrings[compare]) {
+	        // some replacement strings can be localized
+	        capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+	      }
+	    }
 
-	    /**
-	     * Calculate this point but as a unit vector from 0, 0, meaning
-	     * that the distance from the resulting point to the 0, 0
-	     * coordinate will be equal to 1 and the angle from the resulting
-	     * point to the 0, 0 coordinate will be the same as before.
-	     * @return {Point} unit vector point
-	     */
-	    unit:    function() { return this.clone()._unit(); },
+	    replacements['var' + i] = capture;
+	  }
 
-	    /**
-	     * Compute a perpendicular point, where the new y coordinate
-	     * is the old x coordinate and the new x coordinate is the old y
-	     * coordinate multiplied by -1
-	     * @return {Point} perpendicular point
-	     */
-	    perp:    function() { return this.clone()._perp(); },
+	  return replacements;
+	}
 
-	    /**
-	     * Return a version of this point with the x & y coordinates
-	     * rounded to integers.
-	     * @return {Point} rounded point
-	     */
-	    round:   function() { return this.clone()._round(); },
+	function parseError(capture, idType) {
+	  var compare = capture.toLowerCase();
 
-	    /**
-	     * Return the magitude of this point: this is the Euclidean
-	     * distance from the 0, 0 coordinate to this point's x and y
-	     * coordinates.
-	     * @return {Number} magnitude
-	     */
-	    mag: function() {
-	        return Math.sqrt(this.x * this.x + this.y * this.y);
-	    },
+	  if (_krData.localizeStrings[compare]) {
+	    // some replacement strings can be localized
+	    capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+	  }
 
-	    /**
-	     * Judge whether this point is equal to another point, returning
-	     * true or false.
-	     * @param {Point} other the other point
-	     * @return {boolean} whether the points are equal
-	     */
-	    equals: function(other) {
-	        return this.x === other.x &&
-	               this.y === other.y;
-	    },
+	  switch (idType) {
+	    // link a string like "this node"
+	    case 'this':
+	      capture = linkErrorObject(capture);
+	      break;
 
-	    /**
-	     * Calculate the distance from this point to another point
-	     * @param {Point} p the other point
-	     * @return {Number} distance
-	     */
-	    dist: function(p) {
-	        return Math.sqrt(this.distSqr(p));
-	    },
+	    case 'url':
+	      capture = linkURL(capture);
+	      break;
+	    // link an entity ID
 
-	    /**
-	     * Calculate the distance from this point to another point,
-	     * without the square root step. Useful if you're comparing
-	     * relative distances.
-	     * @param {Point} p the other point
-	     * @return {Number} distance
-	     */
-	    distSqr: function(p) {
-	        var dx = p.x - this.x,
-	            dy = p.y - this.y;
-	        return dx * dx + dy * dy;
-	    },
+	    case 'n':
+	    case 'w':
+	    case 'r':
+	      capture = linkEntity(idType + capture);
+	      break;
+	    // some errors have more complex ID lists/variance
 
-	    /**
-	     * Get the angle from the 0, 0 coordinate to this point, in radians
-	     * coordinates.
-	     * @return {Number} angle
-	     */
-	    angle: function() {
-	        return Math.atan2(this.y, this.x);
-	    },
+	    case '20':
+	      capture = parse20(capture);
+	      break;
 
-	    /**
-	     * Get the angle from this point to another point, in radians
-	     * @param {Point} b the other point
-	     * @return {Number} angle
-	     */
-	    angleTo: function(b) {
-	        return Math.atan2(this.y - b.y, this.x - b.x);
-	    },
+	    case '211':
+	      capture = parse211(capture);
+	      break;
 
-	    /**
-	     * Get the angle between this point and another point, in radians
-	     * @param {Point} b the other point
-	     * @return {Number} angle
-	     */
-	    angleWith: function(b) {
-	        return this.angleWithSep(b.x, b.y);
-	    },
+	    case '231':
+	      capture = parse231(capture);
+	      break;
 
-	    /*
-	     * Find the angle of the two vectors, solving the formula for
-	     * the cross product a x b = |a||b|sin(θ) for θ.
-	     * @param {Number} x the x-coordinate
-	     * @param {Number} y the y-coordinate
-	     * @return {Number} the angle in radians
-	     */
-	    angleWithSep: function(x, y) {
-	        return Math.atan2(
-	            this.x * y - this.y * x,
-	            this.x * x + this.y * y);
-	    },
+	    case '294':
+	      capture = parse294(capture);
+	      break;
 
-	    _matMult: function(m) {
-	        var x = m[0] * this.x + m[1] * this.y,
-	            y = m[2] * this.x + m[3] * this.y;
-	        this.x = x;
-	        this.y = y;
-	        return this;
-	    },
+	    case '370':
+	      capture = parse370(capture);
+	      break;
+	  }
 
-	    _add: function(p) {
-	        this.x += p.x;
-	        this.y += p.y;
-	        return this;
-	    },
+	  return capture;
 
-	    _sub: function(p) {
-	        this.x -= p.x;
-	        this.y -= p.y;
-	        return this;
-	    },
+	  function linkErrorObject(d) {
+	    return "<a class=\"error_object_link\">".concat(d, "</a>");
+	  }
 
-	    _mult: function(k) {
-	        this.x *= k;
-	        this.y *= k;
-	        return this;
-	    },
+	  function linkEntity(d) {
+	    return "<a class=\"error_entity_link\">".concat(d, "</a>");
+	  }
 
-	    _div: function(k) {
-	        this.x /= k;
-	        this.y /= k;
-	        return this;
-	    },
+	  function linkURL(d) {
+	    return "<a class=\"kr_external_link\" target=\"_blank\" href=\"".concat(d, "\">").concat(d, "</a>");
+	  } // arbitrary node list of form: #ID, #ID, #ID...
 
-	    _multByPoint: function(p) {
-	        this.x *= p.x;
-	        this.y *= p.y;
-	        return this;
-	    },
 
-	    _divByPoint: function(p) {
-	        this.x /= p.x;
-	        this.y /= p.y;
-	        return this;
-	    },
+	  function parse211(capture) {
+	    var newList = [];
+	    var items = capture.split(', ');
+	    items.forEach(function (item) {
+	      // ID has # at the front
+	      var id = linkEntity('n' + item.slice(1));
+	      newList.push(id);
+	    });
+	    return newList.join(', ');
+	  } // arbitrary way list of form: #ID(layer),#ID(layer),#ID(layer)...
 
-	    _unit: function() {
-	        this._div(this.mag());
-	        return this;
-	    },
 
-	    _perp: function() {
-	        var y = this.y;
-	        this.y = this.x;
-	        this.x = -y;
-	        return this;
-	    },
+	  function parse231(capture) {
+	    var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'
 
-	    _rotate: function(angle) {
-	        var cos = Math.cos(angle),
-	            sin = Math.sin(angle),
-	            x = cos * this.x - sin * this.y,
-	            y = sin * this.x + cos * this.y;
-	        this.x = x;
-	        this.y = y;
-	        return this;
-	    },
+	    var items = capture.split('),');
+	    items.forEach(function (item) {
+	      var match = item.match(/\#(\d+)\((.+)\)?/);
 
-	    _rotateAround: function(angle, p) {
-	        var cos = Math.cos(angle),
-	            sin = Math.sin(angle),
-	            x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),
-	            y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);
-	        this.x = x;
-	        this.y = y;
-	        return this;
-	    },
+	      if (match !== null && match.length > 2) {
+	        newList.push(linkEntity('w' + match[1]) + ' ' + _t('QA.keepRight.errorTypes.231.layer', {
+	          layer: match[2]
+	        }));
+	      }
+	    });
+	    return newList.join(', ');
+	  } // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
 
-	    _round: function() {
-	        this.x = Math.round(this.x);
-	        this.y = Math.round(this.y);
-	        return this;
-	    }
-	};
 
-	/**
-	 * Construct a point from an array if necessary, otherwise if the input
-	 * is already a Point, or an unknown type, return it unchanged
-	 * @param {Array<Number>|Point|*} a any kind of input value
-	 * @return {Point} constructed point, or passed-through value.
-	 * @example
-	 * // this
-	 * var point = Point.convert([0, 1]);
-	 * // is equivalent to
-	 * var point = new Point(0, 1);
-	 */
-	Point.convert = function (a) {
-	    if (a instanceof Point) {
-	        return a;
-	    }
-	    if (Array.isArray(a)) {
-	        return new Point(a[0], a[1]);
-	    }
-	    return a;
-	};
+	  function parse294(capture) {
+	    var newList = [];
+	    var items = capture.split(',');
+	    items.forEach(function (item) {
+	      // item of form "from/to node/relation #ID"
+	      item = item.split(' '); // to/from role is more clear in quotes
 
-	var vectortilefeature = VectorTileFeature;
+	      var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type
 
-	function VectorTileFeature(pbf, end, extent, keys, values) {
-	    // Public
-	    this.properties = {};
-	    this.extent = extent;
-	    this.type = 0;
+	      var idType = item[1].slice(0, 1); // ID has # at the front
+
+	      var id = item[2].slice(1);
+	      id = linkEntity(idType + id);
+	      newList.push("".concat(role, " ").concat(item[1], " ").concat(id));
+	    });
+	    return newList.join(', ');
+	  } // may or may not include the string "(including the name 'name')"
 
-	    // Private
-	    this._pbf = pbf;
-	    this._geometry = -1;
-	    this._keys = keys;
-	    this._values = values;
 
-	    pbf.readFields(readFeature, this, end);
+	  function parse370(capture) {
+	    if (!capture) return '';
+	    var match = capture.match(/\(including the name (\'.+\')\)/);
+
+	    if (match && match.length) {
+	      return _t('QA.keepRight.errorTypes.370.including_the_name', {
+	        name: match[1]
+	      });
+	    }
+
+	    return '';
+	  } // arbitrary node list of form: #ID,#ID,#ID...
+
+
+	  function parse20(capture) {
+	    var newList = [];
+	    var items = capture.split(',');
+	    items.forEach(function (item) {
+	      // ID has # at the front
+	      var id = linkEntity('n' + item.slice(1));
+	      newList.push(id);
+	    });
+	    return newList.join(', ');
+	  }
 	}
 
-	function readFeature(tag, feature, pbf) {
-	    if (tag == 1) { feature.id = pbf.readVarint(); }
-	    else if (tag == 2) { readTag(pbf, feature); }
-	    else if (tag == 3) { feature.type = pbf.readVarint(); }
-	    else if (tag == 4) { feature._geometry = pbf.pos; }
-	}
+	var serviceKeepRight = {
+	  title: 'keepRight',
+	  init: function init() {
+	    _mainFileFetcher.get('keepRight').then(function (d) {
+	      return _krData = d;
+	    });
 
-	function readTag(pbf, feature) {
-	    var end = pbf.readVarint() + pbf.pos;
+	    if (!_cache) {
+	      this.reset();
+	    }
 
-	    while (pbf.pos < end) {
-	        var key = feature._keys[pbf.readVarint()],
-	            value = feature._values[pbf.readVarint()];
-	        feature.properties[key] = value;
+	    this.event = utilRebind(this, dispatch$1, 'on');
+	  },
+	  reset: function reset() {
+	    if (_cache) {
+	      Object.values(_cache.inflightTile).forEach(abortRequest);
 	    }
-	}
 
-	VectorTileFeature.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
+	    _cache = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush()
+	    };
+	  },
+	  // KeepRight API:  http://osm.mueschelsoft.de/keepright/interfacing.php
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
 
-	VectorTileFeature.prototype.loadGeometry = function() {
-	    var pbf = this._pbf;
-	    pbf.pos = this._geometry;
+	    var options = {
+	      format: 'geojson',
+	      ch: _krRuleset
+	    }; // determine the needed tiles to cover the view
 
-	    var end = pbf.readVarint() + pbf.pos,
-	        cmd = 1,
-	        length = 0,
-	        x = 0,
-	        y = 0,
-	        lines = [],
-	        line;
+	    var tiles = tiler.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    while (pbf.pos < end) {
-	        if (length <= 0) {
-	            var cmdLen = pbf.readVarint();
-	            cmd = cmdLen & 0x7;
-	            length = cmdLen >> 3;
-	        }
+	    abortUnwantedRequests(_cache, tiles); // issue new requests..
 
-	        length--;
+	    tiles.forEach(function (tile) {
+	      if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) return;
+
+	      var _tile$extent$rectangl = tile.extent.rectangle(),
+	          _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
+	          left = _tile$extent$rectangl2[0],
+	          top = _tile$extent$rectangl2[1],
+	          right = _tile$extent$rectangl2[2],
+	          bottom = _tile$extent$rectangl2[3];
+
+	      var params = Object.assign({}, options, {
+	        left: left,
+	        bottom: bottom,
+	        right: right,
+	        top: top
+	      });
+	      var url = "".concat(_krUrlRoot, "/export.php?") + utilQsString(params);
+	      var controller = new AbortController();
+	      _cache.inflightTile[tile.id] = controller;
+	      d3_json(url, {
+	        signal: controller.signal
+	      }).then(function (data) {
+	        delete _cache.inflightTile[tile.id];
+	        _cache.loadedTile[tile.id] = true;
+
+	        if (!data || !data.features || !data.features.length) {
+	          throw new Error('No Data');
+	        }
+
+	        data.features.forEach(function (feature) {
+	          var _feature$properties = feature.properties,
+	              itemType = _feature$properties.error_type,
+	              id = _feature$properties.error_id,
+	              _feature$properties$c = _feature$properties.comment,
+	              comment = _feature$properties$c === void 0 ? null : _feature$properties$c,
+	              objectId = _feature$properties.object_id,
+	              objectType = _feature$properties.object_type,
+	              schema = _feature$properties.schema,
+	              title = _feature$properties.title;
+	          var loc = feature.geometry.coordinates,
+	              _feature$properties$d = feature.properties.description,
+	              description = _feature$properties$d === void 0 ? '' : _feature$properties$d; // if there is a parent, save its error type e.g.:
+	          //  Error 191 = "highway-highway"
+	          //  Error 190 = "intersections without junctions"  (parent)
+
+	          var issueTemplate = _krData.errorTypes[itemType];
+	          var parentIssueType = (Math.floor(itemType / 10) * 10).toString(); // try to handle error type directly, fallback to parent error type.
+
+	          var whichType = issueTemplate ? itemType : parentIssueType;
+	          var whichTemplate = _krData.errorTypes[whichType]; // Rewrite a few of the errors at this point..
+	          // This is done to make them easier to linkify and translate.
+
+	          switch (whichType) {
+	            case '170':
+	              description = "This feature has a FIXME tag: ".concat(description);
+	              break;
 
-	        if (cmd === 1 || cmd === 2) {
-	            x += pbf.readSVarint();
-	            y += pbf.readSVarint();
+	            case '292':
+	            case '293':
+	              description = description.replace('A turn-', 'This turn-');
+	              break;
 
-	            if (cmd === 1) { // moveTo
-	                if (line) { lines.push(line); }
-	                line = [];
-	            }
+	            case '294':
+	            case '295':
+	            case '296':
+	            case '297':
+	            case '298':
+	              description = "This turn-restriction~".concat(description);
+	              break;
 
-	            line.push(new pointGeometry(x, y));
+	            case '300':
+	              description = 'This highway is missing a maxspeed tag';
+	              break;
 
-	        } else if (cmd === 7) {
+	            case '411':
+	            case '412':
+	            case '413':
+	              description = "This feature~".concat(description);
+	              break;
+	          } // move markers slightly so it doesn't obscure the geometry,
+	          // then move markers away from other coincident markers
+
+
+	          var coincident = false;
+
+	          do {
+	            // first time, move marker up. after that, move marker right.
+	            var delta = coincident ? [0.00001, 0] : [0, 0.00001];
+	            loc = geoVecAdd(loc, delta);
+	            var bbox = geoExtent(loc).bbox();
+	            coincident = _cache.rtree.search(bbox).length;
+	          } while (coincident);
+
+	          var d = new QAItem(loc, _this, itemType, id, {
+	            comment: comment,
+	            description: description,
+	            whichType: whichType,
+	            parentIssueType: parentIssueType,
+	            severity: whichTemplate.severity || 'error',
+	            objectId: objectId,
+	            objectType: objectType,
+	            schema: schema,
+	            title: title
+	          });
+	          d.replacements = tokenReplacements(d);
+	          _cache.data[id] = d;
 
-	            // Workaround for https://github.com/mapbox/mapnik-vector-tile/issues/90
-	            if (line) {
-	                line.push(line[0].clone()); // closePolygon
-	            }
+	          _cache.rtree.insert(encodeIssueRtree(d));
+	        });
+	        dispatch$1.call('loaded');
+	      })["catch"](function () {
+	        delete _cache.inflightTile[tile.id];
+	        _cache.loadedTile[tile.id] = true;
+	      });
+	    });
+	  },
+	  postUpdate: function postUpdate(d, callback) {
+	    var _this2 = this;
 
-	        } else {
-	            throw new Error('unknown command ' + cmd);
-	        }
+	    if (_cache.inflightPost[d.id]) {
+	      return callback({
+	        message: 'Error update already inflight',
+	        status: -2
+	      }, d);
 	    }
 
-	    if (line) { lines.push(line); }
-
-	    return lines;
-	};
-
-	VectorTileFeature.prototype.bbox = function() {
-	    var pbf = this._pbf;
-	    pbf.pos = this._geometry;
+	    var params = {
+	      schema: d.schema,
+	      id: d.id
+	    };
 
-	    var end = pbf.readVarint() + pbf.pos,
-	        cmd = 1,
-	        length = 0,
-	        x = 0,
-	        y = 0,
-	        x1 = Infinity,
-	        x2 = -Infinity,
-	        y1 = Infinity,
-	        y2 = -Infinity;
+	    if (d.newStatus) {
+	      params.st = d.newStatus;
+	    }
 
-	    while (pbf.pos < end) {
-	        if (length <= 0) {
-	            var cmdLen = pbf.readVarint();
-	            cmd = cmdLen & 0x7;
-	            length = cmdLen >> 3;
-	        }
+	    if (d.newComment !== undefined) {
+	      params.co = d.newComment;
+	    } // NOTE: This throws a CORS err, but it seems successful.
+	    // We don't care too much about the response, so this is fine.
 
-	        length--;
 
-	        if (cmd === 1 || cmd === 2) {
-	            x += pbf.readSVarint();
-	            y += pbf.readSVarint();
-	            if (x < x1) { x1 = x; }
-	            if (x > x2) { x2 = x; }
-	            if (y < y1) { y1 = y; }
-	            if (y > y2) { y2 = y; }
+	    var url = "".concat(_krUrlRoot, "/comment.php?") + utilQsString(params);
+	    var controller = new AbortController();
+	    _cache.inflightPost[d.id] = controller; // Since this is expected to throw an error just continue as if it worked
+	    // (worst case scenario the request truly fails and issue will show up if iD restarts)
 
-	        } else if (cmd !== 7) {
-	            throw new Error('unknown command ' + cmd);
-	        }
-	    }
+	    d3_json(url, {
+	      signal: controller.signal
+	    })["finally"](function () {
+	      delete _cache.inflightPost[d.id];
 
-	    return [x1, y1, x2, y2];
-	};
+	      if (d.newStatus === 'ignore') {
+	        // ignore permanently (false positive)
+	        _this2.removeItem(d);
+	      } else if (d.newStatus === 'ignore_t') {
+	        // ignore temporarily (error fixed)
+	        _this2.removeItem(d);
 
-	VectorTileFeature.prototype.toGeoJSON = function(x, y, z) {
-	    var size = this.extent * Math.pow(2, z),
-	        x0 = this.extent * x,
-	        y0 = this.extent * y,
-	        coords = this.loadGeometry(),
-	        type = VectorTileFeature.types[this.type],
-	        i, j;
+	        _cache.closed["".concat(d.schema, ":").concat(d.id)] = true;
+	      } else {
+	        d = _this2.replaceItem(d.update({
+	          comment: d.newComment,
+	          newComment: undefined,
+	          newState: undefined
+	        }));
+	      }
 
-	    function project(line) {
-	        for (var j = 0; j < line.length; j++) {
-	            var p = line[j], y2 = 180 - (p.y + y0) * 360 / size;
-	            line[j] = [
-	                (p.x + x0) * 360 / size - 180,
-	                360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90
-	            ];
-	        }
-	    }
+	      if (callback) callback(null, d);
+	    });
+	  },
+	  // Get all cached QAItems covering the viewport
+	  getItems: function getItems(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return _cache.rtree.search(bbox).map(function (d) {
+	      return d.data;
+	    });
+	  },
+	  // Get a QAItem from cache
+	  // NOTE: Don't change method name until UI v3 is merged
+	  getError: function getError(id) {
+	    return _cache.data[id];
+	  },
+	  // Replace a single QAItem in the cache
+	  replaceItem: function replaceItem(item) {
+	    if (!(item instanceof QAItem) || !item.id) return;
+	    _cache.data[item.id] = item;
+	    updateRtree(encodeIssueRtree(item), true); // true = replace
 
-	    switch (this.type) {
-	    case 1:
-	        var points = [];
-	        for (i = 0; i < coords.length; i++) {
-	            points[i] = coords[i][0];
-	        }
-	        coords = points;
-	        project(coords);
-	        break;
+	    return item;
+	  },
+	  // Remove a single QAItem from the cache
+	  removeItem: function removeItem(item) {
+	    if (!(item instanceof QAItem) || !item.id) return;
+	    delete _cache.data[item.id];
+	    updateRtree(encodeIssueRtree(item), false); // false = remove
+	  },
+	  issueURL: function issueURL(item) {
+	    return "".concat(_krUrlRoot, "/report_map.php?schema=").concat(item.schema, "&error=").concat(item.id);
+	  },
+	  // Get an array of issues closed during this session.
+	  // Used to populate `closed:keepright` changeset tag
+	  getClosedIDs: function getClosedIDs() {
+	    return Object.keys(_cache.closed).sort();
+	  }
+	};
 
-	    case 2:
-	        for (i = 0; i < coords.length; i++) {
-	            project(coords[i]);
-	        }
-	        break;
+	var tiler$1 = utilTiler();
+	var dispatch$2 = dispatch('loaded');
+	var _tileZoom$1 = 14;
+	var _impOsmUrls = {
+	  ow: 'https://grab.community.improve-osm.org/directionOfFlowService',
+	  mr: 'https://grab.community.improve-osm.org/missingGeoService',
+	  tr: 'https://grab.community.improve-osm.org/turnRestrictionService'
+	};
+	var _impOsmData = {
+	  icons: {}
+	}; // This gets reassigned if reset
 
-	    case 3:
-	        coords = classifyRings(coords);
-	        for (i = 0; i < coords.length; i++) {
-	            for (j = 0; j < coords[i].length; j++) {
-	                project(coords[i][j]);
-	            }
-	        }
-	        break;
-	    }
+	var _cache$1;
 
-	    if (coords.length === 1) {
-	        coords = coords[0];
-	    } else {
-	        type = 'Multi' + type;
+	function abortRequest$1(i) {
+	  Object.values(i).forEach(function (controller) {
+	    if (controller) {
+	      controller.abort();
 	    }
+	  });
+	}
 
-	    var result = {
-	        type: "Feature",
-	        geometry: {
-	            type: type,
-	            coordinates: coords
-	        },
-	        properties: this.properties
-	    };
+	function abortUnwantedRequests$1(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
-	    if ('id' in this) {
-	        result.id = this.id;
+	    if (!wanted) {
+	      abortRequest$1(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
 	    }
+	  });
+	}
 
-	    return result;
-	};
+	function encodeIssueRtree$1(d) {
+	  return {
+	    minX: d.loc[0],
+	    minY: d.loc[1],
+	    maxX: d.loc[0],
+	    maxY: d.loc[1],
+	    data: d
+	  };
+	} // Replace or remove QAItem from rtree
 
-	// classifies an array of rings into polygons with outer rings and holes
 
-	function classifyRings(rings) {
-	    var len = rings.length;
+	function updateRtree$1(item, replace) {
+	  _cache$1.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	    if (len <= 1) { return [rings]; }
+	  if (replace) {
+	    _cache$1.rtree.insert(item);
+	  }
+	}
 
-	    var polygons = [],
-	        polygon,
-	        ccw;
+	function linkErrorObject(d) {
+	  return "<a class=\"error_object_link\">".concat(d, "</a>");
+	}
 
-	    for (var i = 0; i < len; i++) {
-	        var area = signedArea$1(rings[i]);
-	        if (area === 0) { continue; }
+	function linkEntity(d) {
+	  return "<a class=\"error_entity_link\">".concat(d, "</a>");
+	}
 
-	        if (ccw === undefined) { ccw = area < 0; }
+	function pointAverage(points) {
+	  if (points.length) {
+	    var sum = points.reduce(function (acc, point) {
+	      return geoVecAdd(acc, [point.lon, point.lat]);
+	    }, [0, 0]);
+	    return geoVecScale(sum, 1 / points.length);
+	  } else {
+	    return [0, 0];
+	  }
+	}
 
-	        if (ccw === area < 0) {
-	            if (polygon) { polygons.push(polygon); }
-	            polygon = [rings[i]];
+	function relativeBearing(p1, p2) {
+	  var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
 
-	        } else {
-	            polygon.push(rings[i]);
-	        }
-	    }
-	    if (polygon) { polygons.push(polygon); }
+	  if (angle < 0) {
+	    angle += 2 * Math.PI;
+	  } // Return degrees
 
-	    return polygons;
-	}
 
-	function signedArea$1(ring) {
-	    var sum = 0;
-	    for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
-	        p1 = ring[i];
-	        p2 = ring[j];
-	        sum += (p2.x - p1.x) * (p1.y + p2.y);
-	    }
-	    return sum;
-	}
+	  return angle * 180 / Math.PI;
+	} // Assuming range [0,360)
 
-	var vectortilelayer = VectorTileLayer;
 
-	function VectorTileLayer(pbf, end) {
-	    // Public
-	    this.version = 1;
-	    this.name = null;
-	    this.extent = 4096;
-	    this.length = 0;
+	function cardinalDirection(bearing) {
+	  var dir = 45 * Math.round(bearing / 45);
+	  var compass = {
+	    0: 'north',
+	    45: 'northeast',
+	    90: 'east',
+	    135: 'southeast',
+	    180: 'south',
+	    225: 'southwest',
+	    270: 'west',
+	    315: 'northwest',
+	    360: 'north'
+	  };
+	  return _t("QA.improveOSM.directions.".concat(compass[dir]));
+	} // Errors shouldn't obscure each other
 
-	    // Private
-	    this._pbf = pbf;
-	    this._keys = [];
-	    this._values = [];
-	    this._features = [];
 
-	    pbf.readFields(readLayer, this, end);
+	function preventCoincident(loc, bumpUp) {
+	  var coincident = false;
 
-	    this.length = this._features.length;
-	}
+	  do {
+	    // first time, move marker up. after that, move marker right.
+	    var delta = coincident ? [0.00001, 0] : bumpUp ? [0, 0.00001] : [0, 0];
+	    loc = geoVecAdd(loc, delta);
+	    var bbox = geoExtent(loc).bbox();
+	    coincident = _cache$1.rtree.search(bbox).length;
+	  } while (coincident);
 
-	function readLayer(tag, layer, pbf) {
-	    if (tag === 15) { layer.version = pbf.readVarint(); }
-	    else if (tag === 1) { layer.name = pbf.readString(); }
-	    else if (tag === 5) { layer.extent = pbf.readVarint(); }
-	    else if (tag === 2) { layer._features.push(pbf.pos); }
-	    else if (tag === 3) { layer._keys.push(pbf.readString()); }
-	    else if (tag === 4) { layer._values.push(readValueMessage(pbf)); }
+	  return loc;
 	}
 
-	function readValueMessage(pbf) {
-	    var value = null,
-	        end = pbf.readVarint() + pbf.pos;
+	var serviceImproveOSM = {
+	  title: 'improveOSM',
+	  init: function init() {
+	    _mainFileFetcher.get('qa_data').then(function (d) {
+	      return _impOsmData = d.improveOSM;
+	    });
 
-	    while (pbf.pos < end) {
-	        var tag = pbf.readVarint() >> 3;
+	    if (!_cache$1) {
+	      this.reset();
+	    }
 
-	        value = tag === 1 ? pbf.readString() :
-	            tag === 2 ? pbf.readFloat() :
-	            tag === 3 ? pbf.readDouble() :
-	            tag === 4 ? pbf.readVarint64() :
-	            tag === 5 ? pbf.readVarint() :
-	            tag === 6 ? pbf.readSVarint() :
-	            tag === 7 ? pbf.readBoolean() : null;
+	    this.event = utilRebind(this, dispatch$2, 'on');
+	  },
+	  reset: function reset() {
+	    if (_cache$1) {
+	      Object.values(_cache$1.inflightTile).forEach(abortRequest$1);
 	    }
 
-	    return value;
-	}
+	    _cache$1 = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush()
+	    };
+	  },
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
 
-	// return feature `i` from this layer as a `VectorTileFeature`
-	VectorTileLayer.prototype.feature = function(i) {
-	    if (i < 0 || i >= this._features.length) { throw new Error('feature index out of bounds'); }
+	    var options = {
+	      client: 'iD',
+	      status: 'OPEN',
+	      zoom: '19' // Use a high zoom so that clusters aren't returned
 
-	    this._pbf.pos = this._features[i];
+	    }; // determine the needed tiles to cover the view
 
-	    var end = this._pbf.readVarint() + this._pbf.pos;
-	    return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
-	};
+	    var tiles = tiler$1.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	var vectortile = VectorTile;
+	    abortUnwantedRequests$1(_cache$1, tiles); // issue new requests..
 
-	function VectorTile(pbf, end) {
-	    this.layers = pbf.readFields(readTile, {}, end);
-	}
+	    tiles.forEach(function (tile) {
+	      if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) return;
+
+	      var _tile$extent$rectangl = tile.extent.rectangle(),
+	          _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
+	          east = _tile$extent$rectangl2[0],
+	          north = _tile$extent$rectangl2[1],
+	          west = _tile$extent$rectangl2[2],
+	          south = _tile$extent$rectangl2[3];
+
+	      var params = Object.assign({}, options, {
+	        east: east,
+	        south: south,
+	        west: west,
+	        north: north
+	      }); // 3 separate requests to store for each tile
 
-	function readTile(tag, layers, pbf) {
-	    if (tag === 3) {
-	        var layer = new vectortilelayer(pbf, pbf.readVarint() + pbf.pos);
-	        if (layer.length) { layers[layer.name] = layer; }
-	    }
-	}
+	      var requests = {};
+	      Object.keys(_impOsmUrls).forEach(function (k) {
+	        // We exclude WATER from missing geometry as it doesn't seem useful
+	        // We use most confident one-way and turn restrictions only, still have false positives
+	        var kParams = Object.assign({}, params, k === 'mr' ? {
+	          type: 'PARKING,ROAD,BOTH,PATH'
+	        } : {
+	          confidenceLevel: 'C1'
+	        });
+	        var url = "".concat(_impOsmUrls[k], "/search?") + utilQsString(kParams);
+	        var controller = new AbortController();
+	        requests[k] = controller;
+	        d3_json(url, {
+	          signal: controller.signal
+	        }).then(function (data) {
+	          delete _cache$1.inflightTile[tile.id][k];
+
+	          if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
+	            delete _cache$1.inflightTile[tile.id];
+	            _cache$1.loadedTile[tile.id] = true;
+	          } // Road segments at high zoom == oneways
+
+
+	          if (data.roadSegments) {
+	            data.roadSegments.forEach(function (feature) {
+	              // Position error at the approximate middle of the segment
+	              var points = feature.points,
+	                  wayId = feature.wayId,
+	                  fromNodeId = feature.fromNodeId,
+	                  toNodeId = feature.toNodeId;
+	              var itemId = "".concat(wayId).concat(fromNodeId).concat(toNodeId);
+	              var mid = points.length / 2;
+	              var loc; // Even number of points, find midpoint of the middle two
+	              // Odd number of points, use position of very middle point
+
+	              if (mid % 1 === 0) {
+	                loc = pointAverage([points[mid - 1], points[mid]]);
+	              } else {
+	                mid = points[Math.floor(mid)];
+	                loc = [mid.lon, mid.lat];
+	              } // One-ways can land on same segment in opposite direction
+
+
+	              loc = preventCoincident(loc, false);
+	              var d = new QAItem(loc, _this, k, itemId, {
+	                issueKey: k,
+	                // used as a category
+	                identifier: {
+	                  // used to post changes
+	                  wayId: wayId,
+	                  fromNodeId: fromNodeId,
+	                  toNodeId: toNodeId
+	                },
+	                objectId: wayId,
+	                objectType: 'way'
+	              }); // Variables used in the description
+
+	              d.replacements = {
+	                percentage: feature.percentOfTrips,
+	                num_trips: feature.numberOfTrips,
+	                highway: linkErrorObject(_t('QA.keepRight.error_parts.highway')),
+	                from_node: linkEntity('n' + feature.fromNodeId),
+	                to_node: linkEntity('n' + feature.toNodeId)
+	              };
+	              _cache$1.data[d.id] = d;
+
+	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
+	            });
+	          } // Tiles at high zoom == missing roads
+
+
+	          if (data.tiles) {
+	            data.tiles.forEach(function (feature) {
+	              var type = feature.type,
+	                  x = feature.x,
+	                  y = feature.y,
+	                  numberOfTrips = feature.numberOfTrips;
+	              var geoType = type.toLowerCase();
+	              var itemId = "".concat(geoType).concat(x).concat(y).concat(numberOfTrips); // Average of recorded points should land on the missing geometry
+	              // Missing geometry could happen to land on another error
+
+	              var loc = pointAverage(feature.points);
+	              loc = preventCoincident(loc, false);
+	              var d = new QAItem(loc, _this, "".concat(k, "-").concat(geoType), itemId, {
+	                issueKey: k,
+	                identifier: {
+	                  x: x,
+	                  y: y
+	                }
+	              });
+	              d.replacements = {
+	                num_trips: numberOfTrips,
+	                geometry_type: _t("QA.improveOSM.geometry_types.".concat(geoType))
+	              }; // -1 trips indicates data came from a 3rd party
 
-	var VectorTile$1 = vectortile;
-	var VectorTileFeature$1 = vectortilefeature;
-	var VectorTileLayer$1 = vectortilelayer;
+	              if (numberOfTrips === -1) {
+	                d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
+	              }
 
-	var vectorTile = {
-		VectorTile: VectorTile$1,
-		VectorTileFeature: VectorTileFeature$1,
-		VectorTileLayer: VectorTileLayer$1
-	};
+	              _cache$1.data[d.id] = d;
 
-	var tiler$7 = utilTiler().tileSize(512).margin(1);
-	var dispatch$8 = dispatch('loadedData');
-	var _vtCache;
+	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
+	            });
+	          } // Entities at high zoom == turn restrictions
+
+
+	          if (data.entities) {
+	            data.entities.forEach(function (feature) {
+	              var point = feature.point,
+	                  id = feature.id,
+	                  segments = feature.segments,
+	                  numberOfPasses = feature.numberOfPasses,
+	                  turnType = feature.turnType;
+	              var itemId = "".concat(id.replace(/[,:+#]/g, '_')); // Turn restrictions could be missing at same junction
+	              // We also want to bump the error up so node is accessible
+
+	              var loc = preventCoincident([point.lon, point.lat], true); // Elements are presented in a strange way
+
+	              var ids = id.split(',');
+	              var from_way = ids[0];
+	              var via_node = ids[3];
+	              var to_way = ids[2].split(':')[1];
+	              var d = new QAItem(loc, _this, k, itemId, {
+	                issueKey: k,
+	                identifier: id,
+	                objectId: via_node,
+	                objectType: 'node'
+	              }); // Travel direction along from_way clarifies the turn restriction
+
+	              var _segments$0$points = _slicedToArray(segments[0].points, 2),
+	                  p1 = _segments$0$points[0],
+	                  p2 = _segments$0$points[1];
+
+	              var dir_of_travel = cardinalDirection(relativeBearing(p1, p2)); // Variables used in the description
+
+	              d.replacements = {
+	                num_passed: numberOfPasses,
+	                num_trips: segments[0].numberOfTrips,
+	                turn_restriction: turnType.toLowerCase(),
+	                from_way: linkEntity('w' + from_way),
+	                to_way: linkEntity('w' + to_way),
+	                travel_direction: dir_of_travel,
+	                junction: linkErrorObject(_t('QA.keepRight.error_parts.this_node'))
+	              };
+	              _cache$1.data[d.id] = d;
+
+	              _cache$1.rtree.insert(encodeIssueRtree$1(d));
+
+	              dispatch$2.call('loaded');
+	            });
+	          }
+	        })["catch"](function () {
+	          delete _cache$1.inflightTile[tile.id][k];
 
+	          if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
+	            delete _cache$1.inflightTile[tile.id];
+	            _cache$1.loadedTile[tile.id] = true;
+	          }
+	        });
+	      });
+	      _cache$1.inflightTile[tile.id] = requests;
+	    });
+	  },
+	  getComments: function getComments(item) {
+	    var _this2 = this;
 
-	function abortRequest$7(controller) {
-	    controller.abort();
-	}
+	    // If comments already retrieved no need to do so again
+	    if (item.comments) {
+	      return Promise.resolve(item);
+	    }
 
+	    var key = item.issueKey;
+	    var qParams = {};
 
-	function vtToGeoJSON(data, tile, mergeCache) {
-	    var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
-	    var layers = Object.keys(vectorTile$1.layers);
-	    if (!Array.isArray(layers)) { layers = [layers]; }
-
-	    var features = [];
-	    layers.forEach(function(layerID) {
-	        var layer = vectorTile$1.layers[layerID];
-	        if (layer) {
-	            for (var i = 0; i < layer.length; i++) {
-	                var feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
-	                var geometry = feature.geometry;
-
-	                // Treat all Polygons as MultiPolygons
-	                if (geometry.type === 'Polygon') {
-	                    geometry.type = 'MultiPolygon';
-	                    geometry.coordinates = [geometry.coordinates];
-	                }
+	    if (key === 'ow') {
+	      qParams = item.identifier;
+	    } else if (key === 'mr') {
+	      qParams.tileX = item.identifier.x;
+	      qParams.tileY = item.identifier.y;
+	    } else if (key === 'tr') {
+	      qParams.targetId = item.identifier;
+	    }
 
-	                // Clip to tile bounds
-	                if (geometry.type === 'MultiPolygon') {
-	                    var isClipped = false;
-	                    var featureClip = bboxClip_1(feature, tile.extent.rectangle());
-	                    if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
-	                        // feature = featureClip;
-	                        isClipped = true;
-	                    }
-	                    if (!feature.geometry.coordinates.length) { continue; }   // not actually on this tile
-	                    if (!feature.geometry.coordinates[0].length) { continue; }   // not actually on this tile
-	                }
+	    var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);
 
-	                // Generate some unique IDs and add some metadata
-	                var featurehash = utilHashcode(fastJsonStableStringify(feature));
-	                var propertyhash = utilHashcode(fastJsonStableStringify(feature.properties || {}));
-	                feature.__layerID__ = layerID.replace(/[^_a-zA-Z0-9\-]/g, '_');
-	                feature.__featurehash__ = featurehash;
-	                feature.__propertyhash__ = propertyhash;
-	                features.push(feature);
-
-	                // Clipped Polygons at same zoom with identical properties can get merged
-	                if (isClipped && geometry.type === 'MultiPolygon') {
-	                    var merged = mergeCache[propertyhash];
-	                    if (merged && merged.length) {
-	                        var other = merged[0];
-	                        var coords = union(
-	                            feature.geometry.coordinates,
-	                            other.geometry.coordinates
-	                        );
-
-	                        if (!coords || !coords.length) {
-	                            continue;  // something failed in martinez union
-	                        }
-
-	                        merged.push(feature);
-	                        for (var j = 0; j < merged.length; j++) {      // all these features get...
-	                            merged[j].geometry.coordinates = coords;   // same coords
-	                            merged[j].__featurehash__ = featurehash;   // same hash, so deduplication works
-	                        }
-	                    } else {
-	                        mergeCache[propertyhash] = [feature];
-	                    }
-	                }
-	            }
-	        }
-	    });
+	    var cacheComments = function cacheComments(data) {
+	      // Assign directly for immediate use afterwards
+	      // comments are served newest to oldest
+	      item.comments = data.comments ? data.comments.reverse() : [];
 
-	    return features;
-	}
+	      _this2.replaceItem(item);
+	    };
 
+	    return d3_json(url).then(cacheComments).then(function () {
+	      return item;
+	    });
+	  },
+	  postUpdate: function postUpdate(d, callback) {
+	    if (!serviceOsm.authenticated()) {
+	      // Username required in payload
+	      return callback({
+	        message: 'Not Authenticated',
+	        status: -3
+	      }, d);
+	    }
 
-	function loadTile(source, tile) {
-	    if (source.loaded[tile.id] || source.inflight[tile.id]) { return; }
-
-	    var url = source.template
-	        .replace('{x}', tile.xyz[0])
-	        .replace('{y}', tile.xyz[1])
-	        // TMS-flipped y coordinate
-	        .replace(/\{[t-]y\}/, Math.pow(2, tile.xyz[2]) - tile.xyz[1] - 1)
-	        .replace(/\{z(oom)?\}/, tile.xyz[2])
-	        .replace(/\{switch:([^}]+)\}/, function(s, r) {
-	            var subdomains = r.split(',');
-	            return subdomains[(tile.xyz[0] + tile.xyz[1]) % subdomains.length];
-	        });
+	    if (_cache$1.inflightPost[d.id]) {
+	      return callback({
+	        message: 'Error update already inflight',
+	        status: -2
+	      }, d);
+	    } // Payload can only be sent once username is established
 
 
-	    var controller = new AbortController();
-	    source.inflight[tile.id] = controller;
+	    serviceOsm.userDetails(sendPayload.bind(this));
 
-	    fetch(url, { signal: controller.signal })
-	        .then(function(response) {
-	            if (!response.ok) {
-	                throw new Error(response.status + ' ' + response.statusText);
-	            }
-	            source.loaded[tile.id] = [];
-	            delete source.inflight[tile.id];
-	            return response.arrayBuffer();
-	        })
-	        .then(function(data) {
-	            if (!data) {
-	                throw new Error('No Data');
-	            }
+	    function sendPayload(err, user) {
+	      var _this3 = this;
 
-	            var z = tile.xyz[2];
-	            if (!source.canMerge[z]) {
-	                source.canMerge[z] = {};  // initialize mergeCache
-	            }
+	      if (err) {
+	        return callback(err, d);
+	      }
 
-	            source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
-	            dispatch$8.call('loadedData');
-	        })
-	        .catch(function() {
-	            source.loaded[tile.id] = [];
-	            delete source.inflight[tile.id];
-	        });
-	}
+	      var key = d.issueKey;
+	      var url = "".concat(_impOsmUrls[key], "/comment");
+	      var payload = {
+	        username: user.display_name,
+	        targetIds: [d.identifier]
+	      };
 
+	      if (d.newStatus) {
+	        payload.status = d.newStatus;
+	        payload.text = 'status changed';
+	      } // Comment take place of default text
 
-	var serviceVectorTile = {
 
-	    init: function() {
-	        if (!_vtCache) {
-	            this.reset();
-	        }
+	      if (d.newComment) {
+	        payload.text = d.newComment;
+	      }
 
-	        this.event = utilRebind(this, dispatch$8, 'on');
-	    },
+	      var controller = new AbortController();
+	      _cache$1.inflightPost[d.id] = controller;
+	      var options = {
+	        method: 'POST',
+	        signal: controller.signal,
+	        body: JSON.stringify(payload)
+	      };
+	      d3_json(url, options).then(function () {
+	        delete _cache$1.inflightPost[d.id]; // Just a comment, update error in cache
+
+	        if (!d.newStatus) {
+	          var now = new Date();
+	          var comments = d.comments ? d.comments : [];
+	          comments.push({
+	            username: payload.username,
+	            text: payload.text,
+	            timestamp: now.getTime() / 1000
+	          });
 
+	          _this3.replaceItem(d.update({
+	            comments: comments,
+	            newComment: undefined
+	          }));
+	        } else {
+	          _this3.removeItem(d);
 
-	    reset: function() {
-	        for (var sourceID in _vtCache) {
-	            var source = _vtCache[sourceID];
-	            if (source && source.inflight) {
-	                Object.values(source.inflight).forEach(abortRequest$7);
+	          if (d.newStatus === 'SOLVED') {
+	            // Keep track of the number of issues closed per type to tag the changeset
+	            if (!(d.issueKey in _cache$1.closed)) {
+	              _cache$1.closed[d.issueKey] = 0;
 	            }
+
+	            _cache$1.closed[d.issueKey] += 1;
+	          }
 	        }
 
-	        _vtCache = {};
-	    },
+	        if (callback) callback(null, d);
+	      })["catch"](function (err) {
+	        delete _cache$1.inflightPost[d.id];
+	        if (callback) callback(err.message);
+	      });
+	    }
+	  },
+	  // Get all cached QAItems covering the viewport
+	  getItems: function getItems(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return _cache$1.rtree.search(bbox).map(function (d) {
+	      return d.data;
+	    });
+	  },
+	  // Get a QAItem from cache
+	  // NOTE: Don't change method name until UI v3 is merged
+	  getError: function getError(id) {
+	    return _cache$1.data[id];
+	  },
+	  // get the name of the icon to display for this item
+	  getIcon: function getIcon(itemType) {
+	    return _impOsmData.icons[itemType];
+	  },
+	  // Replace a single QAItem in the cache
+	  replaceItem: function replaceItem(issue) {
+	    if (!(issue instanceof QAItem) || !issue.id) return;
+	    _cache$1.data[issue.id] = issue;
+	    updateRtree$1(encodeIssueRtree$1(issue), true); // true = replace
 
+	    return issue;
+	  },
+	  // Remove a single QAItem from the cache
+	  removeItem: function removeItem(issue) {
+	    if (!(issue instanceof QAItem) || !issue.id) return;
+	    delete _cache$1.data[issue.id];
+	    updateRtree$1(encodeIssueRtree$1(issue), false); // false = remove
+	  },
+	  // Used to populate `closed:improveosm:*` changeset tags
+	  getClosedCounts: function getClosedCounts() {
+	    return _cache$1.closed;
+	  }
+	};
 
-	    addSource: function(sourceID, template) {
-	        _vtCache[sourceID] = { template: template, inflight: {}, loaded: {}, canMerge: {} };
-	        return _vtCache[sourceID];
-	    },
+	var quot = /"/g;
 
+	// B.2.3.2.1 CreateHTML(string, tag, attribute, value)
+	// https://tc39.github.io/ecma262/#sec-createhtml
+	var createHtml = function (string, tag, attribute, value) {
+	  var S = String(requireObjectCoercible(string));
+	  var p1 = '<' + tag;
+	  if (attribute !== '') p1 += ' ' + attribute + '="' + String(value).replace(quot, '&quot;') + '"';
+	  return p1 + '>' + S + '</' + tag + '>';
+	};
 
-	    data: function(sourceID, projection) {
-	        var source = _vtCache[sourceID];
-	        if (!source) { return []; }
+	// check the existence of a method, lowercase
+	// of a tag and escaping quotes in arguments
+	var stringHtmlForced = function (METHOD_NAME) {
+	  return fails(function () {
+	    var test = ''[METHOD_NAME]('"');
+	    return test !== test.toLowerCase() || test.split('"').length > 3;
+	  });
+	};
 
-	        var tiles = tiler$7.getTiles(projection);
-	        var seen = {};
-	        var results = [];
+	// `String.prototype.link` method
+	// https://tc39.github.io/ecma262/#sec-string.prototype.link
+	_export({ target: 'String', proto: true, forced: stringHtmlForced('link') }, {
+	  link: function link(url) {
+	    return createHtml(this, 'a', 'href', url);
+	  }
+	});
 
-	        for (var i = 0; i < tiles.length; i++) {
-	            var features = source.loaded[tiles[i].id];
-	            if (!features || !features.length) { continue; }
+	var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;
 
-	            for (var j = 0; j < features.length; j++) {
-	                var feature = features[j];
-	                var hash = feature.__featurehash__;
-	                if (seen[hash]) { continue; }
-	                seen[hash] = true;
 
-	                // return a shallow copy, because the hash may change
-	                // later if this feature gets merged with another
-	                results.push(Object.assign({}, feature));  // shallow copy
-	            }
-	        }
 
-	        return results;
-	    },
 
 
-	    loadTiles: function(sourceID, template, projection) {
-	        var source = _vtCache[sourceID];
-	        if (!source) {
-	            source = this.addSource(sourceID, template);
-	        }
 
-	        var tiles = tiler$7.getTiles(projection);
+	var nativeEndsWith = ''.endsWith;
+	var min$8 = Math.min;
 
-	        // abort inflight requests that are no longer needed
-	        Object.keys(source.inflight).forEach(function(k) {
-	            var wanted = tiles.find(function(tile) { return k === tile.id; });
-	            if (!wanted) {
-	                abortRequest$7(source.inflight[k]);
-	                delete source.inflight[k];
-	            }
-	        });
+	var CORRECT_IS_REGEXP_LOGIC = correctIsRegexpLogic('endsWith');
+	// https://github.com/zloirock/core-js/pull/702
+	var MDN_POLYFILL_BUG =  !CORRECT_IS_REGEXP_LOGIC && !!function () {
+	  var descriptor = getOwnPropertyDescriptor$4(String.prototype, 'endsWith');
+	  return descriptor && !descriptor.writable;
+	}();
 
-	        tiles.forEach(function(tile) {
-	            loadTile(source, tile);
-	        });
-	    },
+	// `String.prototype.endsWith` method
+	// https://tc39.github.io/ecma262/#sec-string.prototype.endswith
+	_export({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {
+	  endsWith: function endsWith(searchString /* , endPosition = @length */) {
+	    var that = String(requireObjectCoercible(this));
+	    notARegexp(searchString);
+	    var endPosition = arguments.length > 1 ? arguments[1] : undefined;
+	    var len = toLength(that.length);
+	    var end = endPosition === undefined ? len : min$8(toLength(endPosition), len);
+	    var search = String(searchString);
+	    return nativeEndsWith
+	      ? nativeEndsWith.call(that, search, end)
+	      : that.slice(end - search.length, end) === search;
+	  }
+	});
 
+	var getOwnPropertyDescriptor$5 = objectGetOwnPropertyDescriptor.f;
 
-	    cache: function() {
-	        return _vtCache;
-	    }
 
-	};
 
-	var apibase$5 = 'https://www.wikidata.org/w/api.php?';
-	var _wikidataCache = {};
 
 
-	var serviceWikidata = {
 
-	    init: function() {},
+	var nativeStartsWith = ''.startsWith;
+	var min$9 = Math.min;
 
-	    reset: function() {
-	        _wikidataCache = {};
-	    },
+	var CORRECT_IS_REGEXP_LOGIC$1 = correctIsRegexpLogic('startsWith');
+	// https://github.com/zloirock/core-js/pull/702
+	var MDN_POLYFILL_BUG$1 =  !CORRECT_IS_REGEXP_LOGIC$1 && !!function () {
+	  var descriptor = getOwnPropertyDescriptor$5(String.prototype, 'startsWith');
+	  return descriptor && !descriptor.writable;
+	}();
 
+	// `String.prototype.startsWith` method
+	// https://tc39.github.io/ecma262/#sec-string.prototype.startswith
+	_export({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG$1 && !CORRECT_IS_REGEXP_LOGIC$1 }, {
+	  startsWith: function startsWith(searchString /* , position = 0 */) {
+	    var that = String(requireObjectCoercible(this));
+	    notARegexp(searchString);
+	    var index = toLength(min$9(arguments.length > 1 ? arguments[1] : undefined, that.length));
+	    var search = String(searchString);
+	    return nativeStartsWith
+	      ? nativeStartsWith.call(that, search, index)
+	      : that.slice(index, index + search.length) === search;
+	  }
+	});
 
-	    // Search for Wikidata items matching the query
-	    itemsForSearchQuery: function(query, callback) {
-	        if (!query) {
-	            if (callback) { callback('No query', {}); }
-	            return;
-	        }
+	var $trimEnd = stringTrim.end;
 
-	        var lang = this.languagesToQuery()[0];
-
-	        var url = apibase$5 + utilQsString({
-	            action: 'wbsearchentities',
-	            format: 'json',
-	            formatversion: 2,
-	            search: query,
-	            type: 'item',
-	            // the language to search
-	            language: lang,
-	            // the langauge for the label and description in the result
-	            uselang: lang,
-	            limit: 10,
-	            origin: '*'
-	        });
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                if (callback) { callback(null, result.search || {}); }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message, {}); }
-	            });
-	    },
+	var FORCED$e = stringTrimForced('trimEnd');
 
+	var trimEnd = FORCED$e ? function trimEnd() {
+	  return $trimEnd(this);
+	} : ''.trimEnd;
 
-	    // Given a Wikipedia language and article title,
-	    // return an array of corresponding Wikidata entities.
-	    itemsByTitle: function(lang, title, callback) {
-	        if (!title) {
-	            if (callback) { callback('No title', {}); }
-	            return;
-	        }
+	// `String.prototype.{ trimEnd, trimRight }` methods
+	// https://github.com/tc39/ecmascript-string-left-right-trim
+	_export({ target: 'String', proto: true, forced: FORCED$e }, {
+	  trimEnd: trimEnd,
+	  trimRight: trimEnd
+	});
 
-	        lang = lang || 'en';
-	        var url = apibase$5 + utilQsString({
-	            action: 'wbgetentities',
-	            format: 'json',
-	            formatversion: 2,
-	            sites: lang.replace(/-/g, '_') + 'wiki',
-	            titles: title,
-	            languages: 'en', // shrink response by filtering to one language
-	            origin: '*'
-	        });
+	var defaults = createCommonjsModule(function (module) {
+	  function getDefaults() {
+	    return {
+	      baseUrl: null,
+	      breaks: false,
+	      gfm: true,
+	      headerIds: true,
+	      headerPrefix: '',
+	      highlight: null,
+	      langPrefix: 'language-',
+	      mangle: true,
+	      pedantic: false,
+	      renderer: null,
+	      sanitize: false,
+	      sanitizer: null,
+	      silent: false,
+	      smartLists: false,
+	      smartypants: false,
+	      tokenizer: null,
+	      walkTokens: null,
+	      xhtml: false
+	    };
+	  }
+
+	  function changeDefaults(newDefaults) {
+	    module.exports.defaults = newDefaults;
+	  }
+
+	  module.exports = {
+	    defaults: getDefaults(),
+	    getDefaults: getDefaults,
+	    changeDefaults: changeDefaults
+	  };
+	});
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                if (callback) { callback(null, result.entities || {}); }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message, {}); }
-	            });
-	    },
+	/**
+	 * Helpers
+	 */
+	var escapeTest = /[&<>"']/;
+	var escapeReplace = /[&<>"']/g;
+	var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
+	var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
+	var escapeReplacements = {
+	  '&': '&amp;',
+	  '<': '&lt;',
+	  '>': '&gt;',
+	  '"': '&quot;',
+	  "'": '&#39;'
+	};
 
+	var getEscapeReplacement = function getEscapeReplacement(ch) {
+	  return escapeReplacements[ch];
+	};
 
-	    languagesToQuery: function() {
-	        var localeCode = _mainLocalizer.localeCode().toLowerCase();
-	        // HACK: en-us isn't a wikidata language. We should really be filtering by
-	        // the languages known to be supported by wikidata.
-	        if (localeCode === 'en-us') { localeCode = 'en'; }
-	        return utilArrayUniq([
-	            localeCode,
-	            _mainLocalizer.languageCode().toLowerCase(),
-	            'en'
-	        ]);
-	    },
+	function escape$1(html, encode) {
+	  if (encode) {
+	    if (escapeTest.test(html)) {
+	      return html.replace(escapeReplace, getEscapeReplacement);
+	    }
+	  } else {
+	    if (escapeTestNoEncode.test(html)) {
+	      return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
+	    }
+	  }
 
+	  return html;
+	}
 
-	    entityByQID: function(qid, callback) {
-	        if (!qid) {
-	            callback('No qid', {});
-	            return;
-	        }
-	        if (_wikidataCache[qid]) {
-	            if (callback) { callback(null, _wikidataCache[qid]); }
-	            return;
-	        }
+	var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
 
-	        var langs = this.languagesToQuery();
-	        var url = apibase$5 + utilQsString({
-	            action: 'wbgetentities',
-	            format: 'json',
-	            formatversion: 2,
-	            ids: qid,
-	            props: 'labels|descriptions|claims|sitelinks',
-	            sitefilter: langs.map(function(d) { return d + 'wiki'; }).join('|'),
-	            languages: langs.join('|'),
-	            languagefallback: 1,
-	            origin: '*'
-	        });
+	function unescape$1(html) {
+	  // explicitly match decimal, hex, and named HTML entities
+	  return html.replace(unescapeTest, function (_, n) {
+	    n = n.toLowerCase();
+	    if (n === 'colon') return ':';
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                }
-	                if (callback) { callback(null, result.entities[qid] || {}); }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message, {}); }
-	            });
-	    },
+	    if (n.charAt(0) === '#') {
+	      return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));
+	    }
 
+	    return '';
+	  });
+	}
 
-	    // Pass `params` object of the form:
-	    // {
-	    //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-	    // }
-	    //
-	    // Get an result object used to display tag documentation
-	    // {
-	    //   title:        'string',
-	    //   description:  'string',
-	    //   editURL:      'string',
-	    //   imageURL:     'string',
-	    //   wiki:         { title: 'string', text: 'string', url: 'string' }
-	    // }
-	    //
-	    getDocs: function(params, callback) {
-	        var langs = this.languagesToQuery();
-	        this.entityByQID(params.qid, function(err, entity) {
-	            if (err || !entity) {
-	                callback(err || 'No entity');
-	                return;
-	            }
+	var caret = /(^|[^\[])\^/g;
 
-	            var i;
-	            var description;
-	            if (entity.descriptions && Object.keys(entity.descriptions).length > 0) {
-	                description = entity.descriptions[Object.keys(entity.descriptions)[0]].value;
-	            }
+	function edit(regex, opt) {
+	  regex = regex.source || regex;
+	  opt = opt || '';
+	  var obj = {
+	    replace: function replace(name, val) {
+	      val = val.source || val;
+	      val = val.replace(caret, '$1');
+	      regex = regex.replace(name, val);
+	      return obj;
+	    },
+	    getRegex: function getRegex() {
+	      return new RegExp(regex, opt);
+	    }
+	  };
+	  return obj;
+	}
 
-	            // prepare result
-	            var result = {
-	                title: entity.id,
-	                description: description,
-	                editURL: 'https://www.wikidata.org/wiki/' + entity.id
-	            };
+	var nonWordAndColonTest = /[^\w:]/g;
+	var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
 
-	            // add image
-	            if (entity.claims) {
-	                var imageroot = 'https://commons.wikimedia.org/w/index.php';
-	                var props = ['P154','P18'];  // logo image, image
-	                var prop, image;
-	                for (i = 0; i < props.length; i++) {
-	                    prop = entity.claims[props[i]];
-	                    if (prop && Object.keys(prop).length > 0) {
-	                        image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
-	                        if (image) {
-	                            result.imageURL = imageroot + '?' + utilQsString({
-	                                title: 'Special:Redirect/file/' + image,
-	                                width: 400
-	                            });
-	                            break;
-	                        }
-	                    }
-	                }
-	            }
+	function cleanUrl(sanitize, base, href) {
+	  if (sanitize) {
+	    var prot;
 
-	            if (entity.sitelinks) {
-	                var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en';
-
-	                // must be one of these that we requested..
-	                for (i = 0; i < langs.length; i++) {   // check each, in order of preference
-	                    var w = langs[i] + 'wiki';
-	                    if (entity.sitelinks[w]) {
-	                        var title = entity.sitelinks[w].title;
-	                        var tKey = 'inspector.wiki_reference';
-	                        if (!englishLocale && langs[i] === 'en') {   // user's locale isn't English but
-	                            tKey = 'inspector.wiki_en_reference';    // we are sending them to enwiki anyway..
-	                        }
-
-	                        result.wiki = {
-	                            title: title,
-	                            text: tKey,
-	                            url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
-	                        };
-	                        break;
-	                    }
-	                }
-	            }
+	    try {
+	      prot = decodeURIComponent(unescape$1(href)).replace(nonWordAndColonTest, '').toLowerCase();
+	    } catch (e) {
+	      return null;
+	    }
 
-	            callback(null, result);
-	        });
+	    if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
+	      return null;
 	    }
+	  }
 
-	};
+	  if (base && !originIndependentUrl.test(href)) {
+	    href = resolveUrl(base, href);
+	  }
 
-	var endpoint = 'https://en.wikipedia.org/w/api.php?';
+	  try {
+	    href = encodeURI(href).replace(/%25/g, '%');
+	  } catch (e) {
+	    return null;
+	  }
 
-	var serviceWikipedia = {
+	  return href;
+	}
 
-	    init: function() {},
-	    reset: function() {},
+	var baseUrls = {};
+	var justDomain = /^[^:]+:\/*[^/]*$/;
+	var protocol = /^([^:]+:)[\s\S]*$/;
+	var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
 
+	function resolveUrl(base, href) {
+	  if (!baseUrls[' ' + base]) {
+	    // we can ignore everything in base after the last slash of its path component,
+	    // but we might need to add _that_
+	    // https://tools.ietf.org/html/rfc3986#section-3
+	    if (justDomain.test(base)) {
+	      baseUrls[' ' + base] = base + '/';
+	    } else {
+	      baseUrls[' ' + base] = rtrim$1(base, '/', true);
+	    }
+	  }
 
-	    search: function(lang, query, callback) {
-	        if (!query) {
-	            if (callback) { callback('No Query', []); }
-	            return;
-	        }
+	  base = baseUrls[' ' + base];
+	  var relativeBase = base.indexOf(':') === -1;
 
-	        lang = lang || 'en';
-	        var url = endpoint.replace('en', lang) +
-	            utilQsString({
-	                action: 'query',
-	                list: 'search',
-	                srlimit: '10',
-	                srinfo: 'suggestion',
-	                format: 'json',
-	                origin: '*',
-	                srsearch: query
-	            });
+	  if (href.substring(0, 2) === '//') {
+	    if (relativeBase) {
+	      return href;
+	    }
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                } else if (!result || !result.query || !result.query.search) {
-	                    throw new Error('No Results');
-	                }
-	                if (callback) {
-	                    var titles = result.query.search.map(function(d) { return d.title; });
-	                    callback(null, titles);
-	                }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err, []); }
-	            });
-	    },
+	    return base.replace(protocol, '$1') + href;
+	  } else if (href.charAt(0) === '/') {
+	    if (relativeBase) {
+	      return href;
+	    }
 
+	    return base.replace(domain, '$1') + href;
+	  } else {
+	    return base + href;
+	  }
+	}
 
-	    suggestions: function(lang, query, callback) {
-	        if (!query) {
-	            if (callback) { callback('', []); }
-	            return;
-	        }
+	var noopTest = {
+	  exec: function noopTest() {}
+	};
 
-	        lang = lang || 'en';
-	        var url = endpoint.replace('en', lang) +
-	            utilQsString({
-	                action: 'opensearch',
-	                namespace: 0,
-	                suggest: '',
-	                format: 'json',
-	                origin: '*',
-	                search: query
-	            });
+	function merge$1(obj) {
+	  var i = 1,
+	      target,
+	      key;
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                } else if (!result || result.length < 2) {
-	                    throw new Error('No Results');
-	                }
-	                if (callback) { callback(null, result[1] || []); }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message, []); }
-	            });
-	    },
+	  for (; i < arguments.length; i++) {
+	    target = arguments[i];
 
+	    for (key in target) {
+	      if (Object.prototype.hasOwnProperty.call(target, key)) {
+	        obj[key] = target[key];
+	      }
+	    }
+	  }
 
-	    translations: function(lang, title, callback) {
-	        if (!title) {
-	            if (callback) { callback('No Title'); }
-	            return;
-	        }
+	  return obj;
+	}
 
-	        var url = endpoint.replace('en', lang) +
-	            utilQsString({
-	                action: 'query',
-	                prop: 'langlinks',
-	                format: 'json',
-	                origin: '*',
-	                lllimit: 500,
-	                titles: title
-	            });
+	function splitCells(tableRow, count) {
+	  // ensure that every cell-delimiting pipe has a space
+	  // before it to distinguish it from an escaped pipe
+	  var row = tableRow.replace(/\|/g, function (match, offset, str) {
+	    var escaped = false,
+	        curr = offset;
 
-	        d3_json(url)
-	            .then(function(result) {
-	                if (result && result.error) {
-	                    throw new Error(result.error);
-	                } else if (!result || !result.query || !result.query.pages) {
-	                    throw new Error('No Results');
-	                }
-	                if (callback) {
-	                    var list = result.query.pages[Object.keys(result.query.pages)[0]];
-	                    var translations = {};
-	                    if (list && list.langlinks) {
-	                        list.langlinks.forEach(function(d) { translations[d.lang] = d['*']; });
-	                    }
-	                    callback(null, translations);
-	                }
-	            })
-	            .catch(function(err) {
-	                if (callback) { callback(err.message); }
-	            });
+	    while (--curr >= 0 && str[curr] === '\\') {
+	      escaped = !escaped;
 	    }
 
-	};
+	    if (escaped) {
+	      // odd number of slashes means | is escaped
+	      // so we leave it alone
+	      return '|';
+	    } else {
+	      // add space before unescaped |
+	      return ' |';
+	    }
+	  }),
+	      cells = row.split(/ \|/);
+	  var i = 0;
 
-	var services = {
-	    geocoder: serviceNominatim,
-	    keepRight: serviceKeepRight,
-	    improveOSM: serviceImproveOSM,
-	    osmose: serviceOsmose,
-	    mapillary: serviceMapillary,
-	    openstreetcam: serviceOpenstreetcam,
-	    osm: serviceOsm,
-	    osmWikibase: serviceOsmWikibase,
-	    maprules: serviceMapRules,
-	    streetside: serviceStreetside,
-	    taginfo: serviceTaginfo,
-	    vectorTile: serviceVectorTile,
-	    wikidata: serviceWikidata,
-	    wikipedia: serviceWikipedia
-	};
+	  if (cells.length > count) {
+	    cells.splice(count);
+	  } else {
+	    while (cells.length < count) {
+	      cells.push('');
+	    }
+	  }
 
-	function svgIcon(name, svgklass, useklass) {
-	    return function drawIcon(selection) {
-	        selection.selectAll('svg.icon' + (svgklass ? '.' + svgklass.split(' ')[0] : ''))
-	            .data([0])
-	            .enter()
-	            .append('svg')
-	            .attr('class', 'icon ' + (svgklass || ''))
-	            .append('use')
-	            .attr('xlink:href', name)
-	            .attr('class', useklass);
-	    };
-	}
+	  for (; i < cells.length; i++) {
+	    // leading or trailing whitespace is ignored per the gfm spec
+	    cells[i] = cells[i].trim().replace(/\\\|/g, '|');
+	  }
 
-	function uiNoteComments() {
-	    var _note;
+	  return cells;
+	} // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
+	// /c*$/ is vulnerable to REDOS.
+	// invert: Remove suffix of non-c chars instead. Default falsey.
 
 
-	    function noteComments(selection) {
-	        if (_note.isNew()) { return; } // don't draw .comments-container
+	function rtrim$1(str, c, invert) {
+	  var l = str.length;
 
-	        var comments = selection.selectAll('.comments-container')
-	            .data([0]);
+	  if (l === 0) {
+	    return '';
+	  } // Length of suffix matching the invert condition.
 
-	        comments = comments.enter()
-	            .append('div')
-	            .attr('class', 'comments-container')
-	            .merge(comments);
 
-	        var commentEnter = comments.selectAll('.comment')
-	            .data(_note.comments)
-	            .enter()
-	            .append('div')
-	            .attr('class', 'comment');
+	  var suffLen = 0; // Step left until we fail to match the invert condition.
 
-	        commentEnter
-	            .append('div')
-	            .attr('class', function(d) { return 'comment-avatar user-' + d.uid; })
-	            .call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+	  while (suffLen < l) {
+	    var currChar = str.charAt(l - suffLen - 1);
 
-	        var mainEnter = commentEnter
-	            .append('div')
-	            .attr('class', 'comment-main');
+	    if (currChar === c && !invert) {
+	      suffLen++;
+	    } else if (currChar !== c && invert) {
+	      suffLen++;
+	    } else {
+	      break;
+	    }
+	  }
 
-	        var metadataEnter = mainEnter
-	            .append('div')
-	            .attr('class', 'comment-metadata');
+	  return str.substr(0, l - suffLen);
+	}
 
-	        metadataEnter
-	            .append('div')
-	            .attr('class', 'comment-author')
-	            .each(function(d) {
-	                var selection = select(this);
-	                var osm = services.osm;
-	                if (osm && d.user) {
-	                    selection = selection
-	                        .append('a')
-	                        .attr('class', 'comment-author-link')
-	                        .attr('href', osm.userURL(d.user))
-	                        .attr('tabindex', -1)
-	                        .attr('target', '_blank');
-	                }
-	                selection
-	                    .text(function(d) { return d.user || _t('note.anonymous'); });
-	            });
+	function findClosingBracket(str, b) {
+	  if (str.indexOf(b[1]) === -1) {
+	    return -1;
+	  }
 
-	        metadataEnter
-	            .append('div')
-	            .attr('class', 'comment-date')
-	            .text(function(d) {
-	                return _t('note.status.' + d.action, { when: localeDateString(d.date) });
-	            });
+	  var l = str.length;
+	  var level = 0,
+	      i = 0;
 
-	        mainEnter
-	            .append('div')
-	            .attr('class', 'comment-text')
-	            .html(function(d) { return d.html; });
+	  for (; i < l; i++) {
+	    if (str[i] === '\\') {
+	      i++;
+	    } else if (str[i] === b[0]) {
+	      level++;
+	    } else if (str[i] === b[1]) {
+	      level--;
 
-	        comments
-	            .call(replaceAvatars);
+	      if (level < 0) {
+	        return i;
+	      }
 	    }
+	  }
 
+	  return -1;
+	}
 
-	    function replaceAvatars(selection) {
-	        var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
-	        var osm = services.osm;
-	        if (showThirdPartyIcons !== 'true' || !osm) { return; }
-
-	        var uids = {};  // gather uids in the comment thread
-	        _note.comments.forEach(function(d) {
-	            if (d.uid) { uids[d.uid] = true; }
-	        });
+	function checkSanitizeDeprecation(opt) {
+	  if (opt && opt.sanitize && !opt.silent) {
+	    console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
+	  }
+	} // copied from https://stackoverflow.com/a/5450113/806777
 
-	        Object.keys(uids).forEach(function(uid) {
-	            osm.loadUser(uid, function(err, user) {
-	                if (!user || !user.image_url) { return; }
 
-	                selection.selectAll('.comment-avatar.user-' + uid)
-	                    .html('')
-	                    .append('img')
-	                    .attr('class', 'icon comment-avatar-icon')
-	                    .attr('src', user.image_url)
-	                    .attr('alt', user.display_name);
-	            });
-	        });
-	    }
+	function repeatString(pattern, count) {
+	  if (count < 1) {
+	    return '';
+	  }
 
+	  var result = '';
 
-	    function localeDateString(s) {
-	        if (!s) { return null; }
-	        var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	        s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
-	        var d = new Date(s);
-	        if (isNaN(d.getTime())) { return null; }
-	        return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  while (count > 1) {
+	    if (count & 1) {
+	      result += pattern;
 	    }
 
+	    count >>= 1;
+	    pattern += pattern;
+	  }
 
-	    noteComments.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteComments;
-	    };
-
-
-	    return noteComments;
+	  return result + pattern;
 	}
 
-	function uiNoteHeader() {
-	    var _note;
+	var helpers = {
+	  escape: escape$1,
+	  unescape: unescape$1,
+	  edit: edit,
+	  cleanUrl: cleanUrl,
+	  resolveUrl: resolveUrl,
+	  noopTest: noopTest,
+	  merge: merge$1,
+	  splitCells: splitCells,
+	  rtrim: rtrim$1,
+	  findClosingBracket: findClosingBracket,
+	  checkSanitizeDeprecation: checkSanitizeDeprecation,
+	  repeatString: repeatString
+	};
 
+	var defaults$1 = defaults.defaults;
+	var rtrim$2 = helpers.rtrim,
+	    splitCells$1 = helpers.splitCells,
+	    _escape = helpers.escape,
+	    findClosingBracket$1 = helpers.findClosingBracket;
 
-	    function noteHeader(selection) {
-	        var header = selection.selectAll('.note-header')
-	            .data(
-	                (_note ? [_note] : []),
-	                function(d) { return d.status + d.id; }
-	            );
+	function outputLink(cap, link, raw) {
+	  var href = link.href;
+	  var title = link.title ? _escape(link.title) : null;
+	  var text = cap[1].replace(/\\([\[\]])/g, '$1');
 
-	        header.exit()
-	            .remove();
+	  if (cap[0].charAt(0) !== '!') {
+	    return {
+	      type: 'link',
+	      raw: raw,
+	      href: href,
+	      title: title,
+	      text: text
+	    };
+	  } else {
+	    return {
+	      type: 'image',
+	      raw: raw,
+	      href: href,
+	      title: title,
+	      text: _escape(text)
+	    };
+	  }
+	}
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'note-header');
+	function indentCodeCompensation(raw, text) {
+	  var matchIndentToCode = raw.match(/^(\s+)(?:```)/);
 
-	        var iconEnter = headerEnter
-	            .append('div')
-	            .attr('class', function(d) { return 'note-header-icon ' + d.status; })
-	            .classed('new', function(d) { return d.id < 0; });
+	  if (matchIndentToCode === null) {
+	    return text;
+	  }
 
-	        iconEnter
-	            .append('div')
-	            .attr('class', 'preset-icon-28')
-	            .call(svgIcon('#iD-icon-note', 'note-fill'));
-
-	        iconEnter.each(function(d) {
-	            var statusIcon = '#iD-icon-' + (d.id < 0 ? 'plus' : (d.status === 'open' ? 'close' : 'apply'));
-	            iconEnter
-	                .append('div')
-	                .attr('class', 'note-icon-annotation')
-	                .call(svgIcon(statusIcon, 'icon-annotation'));
-	        });
+	  var indentToCode = matchIndentToCode[1];
+	  return text.split('\n').map(function (node) {
+	    var matchIndentInNode = node.match(/^\s+/);
 
-	        headerEnter
-	            .append('div')
-	            .attr('class', 'note-header-label')
-	            .text(function(d) {
-	                if (_note.isNew()) { return _t('note.new'); }
-	                return _t('note.note') + ' ' + d.id + ' ' +
-	                    (d.status === 'closed' ? _t('note.closed') : '');
-	            });
+	    if (matchIndentInNode === null) {
+	      return node;
 	    }
 
+	    var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
+	        indentInNode = _matchIndentInNode[0];
 
-	    noteHeader.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteHeader;
-	    };
-
+	    if (indentInNode.length >= indentToCode.length) {
+	      return node.slice(indentToCode.length);
+	    }
 
-	    return noteHeader;
+	    return node;
+	  }).join('\n');
 	}
+	/**
+	 * Tokenizer
+	 */
 
-	function uiNoteReport() {
-	    var _note;
 
-	    function noteReport(selection) {
-	        var url;
-	        if (services.osm && (_note instanceof osmNote) && (!_note.isNew())) {
-	            url = services.osm.noteReportURL(_note);
-	        }
+	var Tokenizer_1 = /*#__PURE__*/function () {
+	  function Tokenizer(options) {
+	    _classCallCheck(this, Tokenizer);
 
-	        var link = selection.selectAll('.note-report')
-	            .data(url ? [url] : []);
+	    this.options = options || defaults$1;
+	  }
 
-	        // exit
-	        link.exit()
-	            .remove();
+	  _createClass(Tokenizer, [{
+	    key: "space",
+	    value: function space(src) {
+	      var cap = this.rules.block.newline.exec(src);
 
-	        // enter
-	        var linkEnter = link.enter()
-	            .append('a')
-	            .attr('class', 'note-report')
-	            .attr('target', '_blank')
-	            .attr('href', function(d) { return d; })
-	            .call(svgIcon('#iD-icon-out-link', 'inline'));
+	      if (cap) {
+	        if (cap[0].length > 1) {
+	          return {
+	            type: 'space',
+	            raw: cap[0]
+	          };
+	        }
 
-	        linkEnter
-	            .append('span')
-	            .text(_t('note.report'));
+	        return {
+	          raw: '\n'
+	        };
+	      }
 	    }
+	  }, {
+	    key: "code",
+	    value: function code(src, tokens) {
+	      var cap = this.rules.block.code.exec(src);
 
+	      if (cap) {
+	        var lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.
 
-	    noteReport.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteReport;
-	    };
+	        if (lastToken && lastToken.type === 'paragraph') {
+	          return {
+	            raw: cap[0],
+	            text: cap[0].trimRight()
+	          };
+	        }
 
-	    return noteReport;
-	}
+	        var text = cap[0].replace(/^ {4}/gm, '');
+	        return {
+	          type: 'code',
+	          raw: cap[0],
+	          codeBlockStyle: 'indented',
+	          text: !this.options.pedantic ? rtrim$2(text, '\n') : text
+	        };
+	      }
+	    }
+	  }, {
+	    key: "fences",
+	    value: function fences(src) {
+	      var cap = this.rules.block.fences.exec(src);
 
-	function uiViewOnOSM(context) {
-	    var _what;   // an osmEntity or osmNote
+	      if (cap) {
+	        var raw = cap[0];
+	        var text = indentCodeCompensation(raw, cap[3] || '');
+	        return {
+	          type: 'code',
+	          raw: raw,
+	          lang: cap[2] ? cap[2].trim() : cap[2],
+	          text: text
+	        };
+	      }
+	    }
+	  }, {
+	    key: "heading",
+	    value: function heading(src) {
+	      var cap = this.rules.block.heading.exec(src);
 
+	      if (cap) {
+	        return {
+	          type: 'heading',
+	          raw: cap[0],
+	          depth: cap[1].length,
+	          text: cap[2]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "nptable",
+	    value: function nptable(src) {
+	      var cap = this.rules.block.nptable.exec(src);
+
+	      if (cap) {
+	        var item = {
+	          type: 'table',
+	          header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
+	          align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+	          cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
+	          raw: cap[0]
+	        };
 
-	    function viewOnOSM(selection) {
-	        var url;
-	        if (_what instanceof osmEntity) {
-	            url = context.connection().entityURL(_what);
-	        } else if (_what instanceof osmNote) {
-	            url = context.connection().noteURL(_what);
-	        }
+	        if (item.header.length === item.align.length) {
+	          var l = item.align.length;
+	          var i;
+
+	          for (i = 0; i < l; i++) {
+	            if (/^ *-+: *$/.test(item.align[i])) {
+	              item.align[i] = 'right';
+	            } else if (/^ *:-+: *$/.test(item.align[i])) {
+	              item.align[i] = 'center';
+	            } else if (/^ *:-+ *$/.test(item.align[i])) {
+	              item.align[i] = 'left';
+	            } else {
+	              item.align[i] = null;
+	            }
+	          }
 
-	        var data = ((!_what || _what.isNew()) ? [] : [_what]);
-	        var link = selection.selectAll('.view-on-osm')
-	            .data(data, function(d) { return d.id; });
+	          l = item.cells.length;
 
-	        // exit
-	        link.exit()
-	            .remove();
+	          for (i = 0; i < l; i++) {
+	            item.cells[i] = splitCells$1(item.cells[i], item.header.length);
+	          }
 
-	        // enter
-	        var linkEnter = link.enter()
-	            .append('a')
-	            .attr('class', 'view-on-osm')
-	            .attr('target', '_blank')
-	            .attr('href', url)
-	            .call(svgIcon('#iD-icon-out-link', 'inline'));
+	          return item;
+	        }
+	      }
+	    }
+	  }, {
+	    key: "hr",
+	    value: function hr(src) {
+	      var cap = this.rules.block.hr.exec(src);
 
-	        linkEnter
-	            .append('span')
-	            .text(_t('inspector.view_on_osm'));
+	      if (cap) {
+	        return {
+	          type: 'hr',
+	          raw: cap[0]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "blockquote",
+	    value: function blockquote(src) {
+	      var cap = this.rules.block.blockquote.exec(src);
 
+	      if (cap) {
+	        var text = cap[0].replace(/^ *> ?/gm, '');
+	        return {
+	          type: 'blockquote',
+	          raw: cap[0],
+	          text: text
+	        };
+	      }
+	    }
+	  }, {
+	    key: "list",
+	    value: function list(src) {
+	      var cap = this.rules.block.list.exec(src);
+
+	      if (cap) {
+	        var raw = cap[0];
+	        var bull = cap[2];
+	        var isordered = bull.length > 1;
+	        var isparen = bull[bull.length - 1] === ')';
+	        var list = {
+	          type: 'list',
+	          raw: raw,
+	          ordered: isordered,
+	          start: isordered ? +bull.slice(0, -1) : '',
+	          loose: false,
+	          items: []
+	        }; // Get each top-level item.
+
+	        var itemMatch = cap[0].match(this.rules.block.item);
+	        var next = false,
+	            item,
+	            space,
+	            b,
+	            addBack,
+	            loose,
+	            istask,
+	            ischecked;
+	        var l = itemMatch.length;
+
+	        for (var i = 0; i < l; i++) {
+	          item = itemMatch[i];
+	          raw = item; // Remove the list item's bullet
+	          // so it is seen as the next token.
+
+	          space = item.length;
+	          item = item.replace(/^ *([*+-]|\d+[.)]) ?/, ''); // Outdent whatever the
+	          // list item contains. Hacky.
+
+	          if (~item.indexOf('\n ')) {
+	            space -= item.length;
+	            item = !this.options.pedantic ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '') : item.replace(/^ {1,4}/gm, '');
+	          } // Determine whether the next list item belongs here.
+	          // Backpedal if it does not belong in this list.
+
+
+	          if (i !== l - 1) {
+	            b = this.rules.block.bullet.exec(itemMatch[i + 1])[0];
+
+	            if (isordered ? b.length === 1 || !isparen && b[b.length - 1] === ')' : b.length > 1 || this.options.smartLists && b !== bull) {
+	              addBack = itemMatch.slice(i + 1).join('\n');
+	              list.raw = list.raw.substring(0, list.raw.length - addBack.length);
+	              i = l - 1;
+	            }
+	          } // Determine whether item is loose or not.
+	          // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
+	          // for discount behavior.
+
+
+	          loose = next || /\n\n(?!\s*$)/.test(item);
+
+	          if (i !== l - 1) {
+	            next = item.charAt(item.length - 1) === '\n';
+	            if (!loose) loose = next;
+	          }
 
-	    viewOnOSM.what = function(_) {
-	        if (!arguments.length) { return _what; }
-	        _what = _;
-	        return viewOnOSM;
-	    };
+	          if (loose) {
+	            list.loose = true;
+	          } // Check for task list items
 
-	    return viewOnOSM;
-	}
 
-	function uiNoteEditor(context) {
-	    var dispatch$1 = dispatch('change');
-	    var noteComments = uiNoteComments();
-	    var noteHeader = uiNoteHeader();
+	          istask = /^\[[ xX]\] /.test(item);
+	          ischecked = undefined;
 
-	    // var formFields = uiFormFields(context);
+	          if (istask) {
+	            ischecked = item[1] !== ' ';
+	            item = item.replace(/^\[[ xX]\] +/, '');
+	          }
 
-	    var _note;
-	    var _newNote;
-	    // var _fieldsArr;
+	          list.items.push({
+	            type: 'list_item',
+	            raw: raw,
+	            task: istask,
+	            checked: ischecked,
+	            loose: loose,
+	            text: item
+	          });
+	        }
 
+	        return list;
+	      }
+	    }
+	  }, {
+	    key: "html",
+	    value: function html(src) {
+	      var cap = this.rules.block.html.exec(src);
 
-	    function noteEditor(selection) {
+	      if (cap) {
+	        return {
+	          type: this.options.sanitize ? 'paragraph' : 'html',
+	          raw: cap[0],
+	          pre: !this.options.sanitizer && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
+	          text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "def",
+	    value: function def(src) {
+	      var cap = this.rules.block.def.exec(src);
 
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	      if (cap) {
+	        if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1);
+	        var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
+	        return {
+	          tag: tag,
+	          raw: cap[0],
+	          href: cap[2],
+	          title: cap[3]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "table",
+	    value: function table(src) {
+	      var cap = this.rules.block.table.exec(src);
+
+	      if (cap) {
+	        var item = {
+	          type: 'table',
+	          header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
+	          align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+	          cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
+	        };
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL');
+	        if (item.header.length === item.align.length) {
+	          item.raw = cap[0];
+	          var l = item.align.length;
+	          var i;
+
+	          for (i = 0; i < l; i++) {
+	            if (/^ *-+: *$/.test(item.align[i])) {
+	              item.align[i] = 'right';
+	            } else if (/^ *:-+: *$/.test(item.align[i])) {
+	              item.align[i] = 'center';
+	            } else if (/^ *:-+ *$/.test(item.align[i])) {
+	              item.align[i] = 'left';
+	            } else {
+	              item.align[i] = null;
+	            }
+	          }
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() {
-	                context.enter(modeBrowse(context));
-	            })
-	            .call(svgIcon('#iD-icon-close'));
+	          l = item.cells.length;
 
-	        headerEnter
-	            .append('h3')
-	            .text(_t('note.title'));
+	          for (i = 0; i < l; i++) {
+	            item.cells[i] = splitCells$1(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
+	          }
 
+	          return item;
+	        }
+	      }
+	    }
+	  }, {
+	    key: "lheading",
+	    value: function lheading(src) {
+	      var cap = this.rules.block.lheading.exec(src);
 
-	        var body = selection.selectAll('.body')
-	            .data([0]);
+	      if (cap) {
+	        return {
+	          type: 'heading',
+	          raw: cap[0],
+	          depth: cap[2].charAt(0) === '=' ? 1 : 2,
+	          text: cap[1]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "paragraph",
+	    value: function paragraph(src) {
+	      var cap = this.rules.block.paragraph.exec(src);
 
-	        body = body.enter()
-	            .append('div')
-	            .attr('class', 'body')
-	            .merge(body);
+	      if (cap) {
+	        return {
+	          type: 'paragraph',
+	          raw: cap[0],
+	          text: cap[1].charAt(cap[1].length - 1) === '\n' ? cap[1].slice(0, -1) : cap[1]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "text",
+	    value: function text(src, tokens) {
+	      var cap = this.rules.block.text.exec(src);
 
-	        var editor = body.selectAll('.note-editor')
-	            .data([0]);
+	      if (cap) {
+	        var lastToken = tokens[tokens.length - 1];
 
-	        editor.enter()
-	            .append('div')
-	            .attr('class', 'modal-section note-editor')
-	            .merge(editor)
-	            .call(noteHeader.note(_note))
-	            .call(noteComments.note(_note))
-	            .call(noteSaveSection);
+	        if (lastToken && lastToken.type === 'text') {
+	          return {
+	            raw: cap[0],
+	            text: cap[0]
+	          };
+	        }
 
-	        var footer = selection.selectAll('.footer')
-	            .data([0]);
+	        return {
+	          type: 'text',
+	          raw: cap[0],
+	          text: cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "escape",
+	    value: function escape(src) {
+	      var cap = this.rules.inline.escape.exec(src);
 
-	        footer.enter()
-	            .append('div')
-	            .attr('class', 'footer')
-	            .merge(footer)
-	            .call(uiViewOnOSM(context).what(_note))
-	            .call(uiNoteReport().note(_note));
+	      if (cap) {
+	        return {
+	          type: 'escape',
+	          raw: cap[0],
+	          text: _escape(cap[1])
+	        };
+	      }
+	    }
+	  }, {
+	    key: "tag",
+	    value: function tag(src, inLink, inRawBlock) {
+	      var cap = this.rules.inline.tag.exec(src);
 
+	      if (cap) {
+	        if (!inLink && /^<a /i.test(cap[0])) {
+	          inLink = true;
+	        } else if (inLink && /^<\/a>/i.test(cap[0])) {
+	          inLink = false;
+	        }
 
-	        // rerender the note editor on any auth change
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.on('change.note-save', function() {
-	                selection.call(noteEditor);
-	            });
+	        if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+	          inRawBlock = true;
+	        } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+	          inRawBlock = false;
 	        }
-	    }
 
+	        return {
+	          type: this.options.sanitize ? 'text' : 'html',
+	          raw: cap[0],
+	          inLink: inLink,
+	          inRawBlock: inRawBlock,
+	          text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "link",
+	    value: function link(src) {
+	      var cap = this.rules.inline.link.exec(src);
 
-	    function noteSaveSection(selection) {
-	        var isSelected = (_note && _note.id === context.selectedNoteID());
-	        var noteSave = selection.selectAll('.note-save')
-	            .data((isSelected ? [_note] : []), function(d) { return d.status + d.id; });
+	      if (cap) {
+	        var lastParenIndex = findClosingBracket$1(cap[2], '()');
 
-	        // exit
-	        noteSave.exit()
-	            .remove();
+	        if (lastParenIndex > -1) {
+	          var start = cap[0].indexOf('!') === 0 ? 5 : 4;
+	          var linkLen = start + cap[1].length + lastParenIndex;
+	          cap[2] = cap[2].substring(0, lastParenIndex);
+	          cap[0] = cap[0].substring(0, linkLen).trim();
+	          cap[3] = '';
+	        }
 
-	        // enter
-	        var noteSaveEnter = noteSave.enter()
-	            .append('div')
-	            .attr('class', 'note-save save-section cf');
-
-	        // // if new note, show categories to pick from
-	        // if (_note.isNew()) {
-	        //     var presets = presetManager;
-
-	        //     // NOTE: this key isn't a age and therefore there is no documentation (yet)
-	        //     _fieldsArr = [
-	        //         uiField(context, presets.field('category'), null, { show: true, revert: false }),
-	        //     ];
-
-	        //     _fieldsArr.forEach(function(field) {
-	        //         field
-	        //             .on('change', changeCategory);
-	        //     });
-
-	        //     noteSaveEnter
-	        //         .append('div')
-	        //         .attr('class', 'note-category')
-	        //         .call(formFields.fieldsArr(_fieldsArr));
-	        // }
-
-	        // function changeCategory() {
-	        //     // NOTE: perhaps there is a better way to get value
-	        //     var val = context.container().select('input[name=\'category\']:checked').property('__data__') || undefined;
-
-	        //     // store the unsaved category with the note itself
-	        //     _note = _note.update({ newCategory: val });
-	        //     var osm = services.osm;
-	        //     if (osm) {
-	        //         osm.replaceNote(_note);  // update note cache
-	        //     }
-	        //     noteSave
-	        //         .call(noteSaveButtons);
-	        // }
-
-	        noteSaveEnter
-	            .append('h4')
-	            .attr('class', '.note-save-header')
-	            .text(function() {
-	                return _note.isNew() ? _t('note.newDescription') : _t('note.newComment');
-	            });
+	        var href = cap[2];
+	        var title = '';
 
-	        var commentTextarea = noteSaveEnter
-	            .append('textarea')
-	            .attr('class', 'new-comment-input')
-	            .attr('placeholder', _t('note.inputPlaceholder'))
-	            .attr('maxlength', 1000)
-	            .property('value', function(d) { return d.newComment; })
-	            .call(utilNoAuto)
-	            .on('keydown.note-input', keydown)
-	            .on('input.note-input', changeInput)
-	            .on('blur.note-input', changeInput);
+	        if (this.options.pedantic) {
+	          var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
 
-	        if (_newNote) {
-	            // autofocus the comment field for new notes
-	            commentTextarea.node().focus();
+	          if (link) {
+	            href = link[1];
+	            title = link[3];
+	          } else {
+	            title = '';
+	          }
+	        } else {
+	          title = cap[3] ? cap[3].slice(1, -1) : '';
 	        }
 
-	        // update
-	        noteSave = noteSaveEnter
-	            .merge(noteSave)
-	            .call(userDetails)
-	            .call(noteSaveButtons);
-
-
-	        // fast submit if user presses cmd+enter
-	        function keydown() {
-	            if (!(event.keyCode === 13 && event.metaKey)) { return; }
+	        href = href.trim().replace(/^<([\s\S]*)>$/, '$1');
+	        var token = outputLink(cap, {
+	          href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
+	          title: title ? title.replace(this.rules.inline._escapes, '$1') : title
+	        }, cap[0]);
+	        return token;
+	      }
+	    }
+	  }, {
+	    key: "reflink",
+	    value: function reflink(src, links) {
+	      var cap;
 
-	            var osm = services.osm;
-	            if (!osm) { return; }
+	      if ((cap = this.rules.inline.reflink.exec(src)) || (cap = this.rules.inline.nolink.exec(src))) {
+	        var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
+	        link = links[link.toLowerCase()];
 
-	            var hasAuth = osm.authenticated();
-	            if (!hasAuth) { return; }
+	        if (!link || !link.href) {
+	          var text = cap[0].charAt(0);
+	          return {
+	            type: 'text',
+	            raw: text,
+	            text: text
+	          };
+	        }
 
-	            if (!_note.newComment) { return; }
+	        var token = outputLink(cap, link, cap[0]);
+	        return token;
+	      }
+	    }
+	  }, {
+	    key: "strong",
+	    value: function strong(src, maskedSrc) {
+	      var prevChar = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';
+	      var match = this.rules.inline.strong.start.exec(src);
 
-	            event.preventDefault();
+	      if (match && (!match[1] || match[1] && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar)))) {
+	        maskedSrc = maskedSrc.slice(-1 * src.length);
+	        var endReg = match[0] === '**' ? this.rules.inline.strong.endAst : this.rules.inline.strong.endUnd;
+	        endReg.lastIndex = 0;
+	        var cap;
 
-	            select(this)
-	                .on('keydown.note-input', null);
+	        while ((match = endReg.exec(maskedSrc)) != null) {
+	          cap = this.rules.inline.strong.middle.exec(maskedSrc.slice(0, match.index + 3));
 
-	            // focus on button and submit
-	            window.setTimeout(function() {
-	                if (_note.isNew()) {
-	                    noteSave.selectAll('.save-button').node().focus();
-	                    clickSave(_note);
-	                } else  {
-	                    noteSave.selectAll('.comment-button').node().focus();
-	                    clickComment(_note);
-	                }
-	            }, 10);
+	          if (cap) {
+	            return {
+	              type: 'strong',
+	              raw: src.slice(0, cap[0].length),
+	              text: src.slice(2, cap[0].length - 2)
+	            };
+	          }
 	        }
+	      }
+	    }
+	  }, {
+	    key: "em",
+	    value: function em(src, maskedSrc) {
+	      var prevChar = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';
+	      var match = this.rules.inline.em.start.exec(src);
 
+	      if (match && (!match[1] || match[1] && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar)))) {
+	        maskedSrc = maskedSrc.slice(-1 * src.length);
+	        var endReg = match[0] === '*' ? this.rules.inline.em.endAst : this.rules.inline.em.endUnd;
+	        endReg.lastIndex = 0;
+	        var cap;
 
-	        function changeInput() {
-	            var input = select(this);
-	            var val = input.property('value').trim() || undefined;
-
-	            // store the unsaved comment with the note itself
-	            _note = _note.update({ newComment: val });
-
-	            var osm = services.osm;
-	            if (osm) {
-	                osm.replaceNote(_note);  // update note cache
-	            }
+	        while ((match = endReg.exec(maskedSrc)) != null) {
+	          cap = this.rules.inline.em.middle.exec(maskedSrc.slice(0, match.index + 2));
 
-	            noteSave
-	                .call(noteSaveButtons);
+	          if (cap) {
+	            return {
+	              type: 'em',
+	              raw: src.slice(0, cap[0].length),
+	              text: src.slice(1, cap[0].length - 1)
+	            };
+	          }
 	        }
+	      }
 	    }
+	  }, {
+	    key: "codespan",
+	    value: function codespan(src) {
+	      var cap = this.rules.inline.code.exec(src);
 
+	      if (cap) {
+	        var text = cap[2].replace(/\n/g, ' ');
+	        var hasNonSpaceChars = /[^ ]/.test(text);
+	        var hasSpaceCharsOnBothEnds = text.startsWith(' ') && text.endsWith(' ');
 
-	    function userDetails(selection) {
-	        var detailSection = selection.selectAll('.detail-section')
-	            .data([0]);
+	        if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
+	          text = text.substring(1, text.length - 1);
+	        }
 
-	        detailSection = detailSection.enter()
-	            .append('div')
-	            .attr('class', 'detail-section')
-	            .merge(detailSection);
+	        text = _escape(text, true);
+	        return {
+	          type: 'codespan',
+	          raw: cap[0],
+	          text: text
+	        };
+	      }
+	    }
+	  }, {
+	    key: "br",
+	    value: function br(src) {
+	      var cap = this.rules.inline.br.exec(src);
 
-	        var osm = services.osm;
-	        if (!osm) { return; }
-
-	        // Add warning if user is not logged in
-	        var hasAuth = osm.authenticated();
-	        var authWarning = detailSection.selectAll('.auth-warning')
-	            .data(hasAuth ? [] : [0]);
-
-	        authWarning.exit()
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 0)
-	            .remove();
-
-	        var authEnter = authWarning.enter()
-	            .insert('div', '.tag-reference-body')
-	            .attr('class', 'field-warning auth-warning')
-	            .style('opacity', 0);
-
-	        authEnter
-	            .call(svgIcon('#iD-icon-alert', 'inline'));
-
-	        authEnter
-	            .append('span')
-	            .text(_t('note.login'));
-
-	        authEnter
-	            .append('a')
-	            .attr('target', '_blank')
-	            .call(svgIcon('#iD-icon-out-link', 'inline'))
-	            .append('span')
-	            .text(_t('login'))
-	            .on('click.note-login', function() {
-	                event.preventDefault();
-	                osm.authenticate();
-	            });
+	      if (cap) {
+	        return {
+	          type: 'br',
+	          raw: cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "del",
+	    value: function del(src) {
+	      var cap = this.rules.inline.del.exec(src);
 
-	        authEnter
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 1);
+	      if (cap) {
+	        return {
+	          type: 'del',
+	          raw: cap[0],
+	          text: cap[1]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "autolink",
+	    value: function autolink(src, mangle) {
+	      var cap = this.rules.inline.autolink.exec(src);
 
+	      if (cap) {
+	        var text, href;
 
-	        var prose = detailSection.selectAll('.note-save-prose')
-	            .data(hasAuth ? [0] : []);
+	        if (cap[2] === '@') {
+	          text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
+	          href = 'mailto:' + text;
+	        } else {
+	          text = _escape(cap[1]);
+	          href = text;
+	        }
 
-	        prose.exit()
-	            .remove();
+	        return {
+	          type: 'link',
+	          raw: cap[0],
+	          text: text,
+	          href: href,
+	          tokens: [{
+	            type: 'text',
+	            raw: text,
+	            text: text
+	          }]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "url",
+	    value: function url(src, mangle) {
+	      var cap;
 
-	        prose = prose.enter()
-	            .append('p')
-	            .attr('class', 'note-save-prose')
-	            .text(_t('note.upload_explanation'))
-	            .merge(prose);
+	      if (cap = this.rules.inline.url.exec(src)) {
+	        var text, href;
 
-	        osm.userDetails(function(err, user) {
-	            if (err) { return; }
+	        if (cap[2] === '@') {
+	          text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
+	          href = 'mailto:' + text;
+	        } else {
+	          // do extended autolink path validation
+	          var prevCapZero;
 
-	            var userLink = select(document.createElement('div'));
+	          do {
+	            prevCapZero = cap[0];
+	            cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
+	          } while (prevCapZero !== cap[0]);
 
-	            if (user.image_url) {
-	                userLink
-	                    .append('img')
-	                    .attr('src', user.image_url)
-	                    .attr('class', 'icon pre-text user-icon');
-	            }
+	          text = _escape(cap[0]);
 
-	            userLink
-	                .append('a')
-	                .attr('class', 'user-info')
-	                .text(user.display_name)
-	                .attr('href', osm.userURL(user.display_name))
-	                .attr('tabindex', -1)
-	                .attr('target', '_blank');
+	          if (cap[1] === 'www.') {
+	            href = 'http://' + text;
+	          } else {
+	            href = text;
+	          }
+	        }
 
-	            prose
-	                .html(_t('note.upload_explanation_with_user', { user: userLink.html() }));
-	        });
+	        return {
+	          type: 'link',
+	          raw: cap[0],
+	          text: text,
+	          href: href,
+	          tokens: [{
+	            type: 'text',
+	            raw: text,
+	            text: text
+	          }]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "inlineText",
+	    value: function inlineText(src, inRawBlock, smartypants) {
+	      var cap = this.rules.inline.text.exec(src);
 
+	      if (cap) {
+	        var text;
 
-	    function noteSaveButtons(selection) {
-	        var osm = services.osm;
-	        var hasAuth = osm && osm.authenticated();
-
-	        var isSelected = (_note && _note.id === context.selectedNoteID());
-	        var buttonSection = selection.selectAll('.buttons')
-	            .data((isSelected ? [_note] : []), function(d) { return d.status + d.id; });
-
-	        // exit
-	        buttonSection.exit()
-	            .remove();
+	        if (inRawBlock) {
+	          text = this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0];
+	        } else {
+	          text = _escape(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
+	        }
 
-	        // enter
-	        var buttonEnter = buttonSection.enter()
-	            .append('div')
-	            .attr('class', 'buttons');
+	        return {
+	          type: 'text',
+	          raw: cap[0],
+	          text: text
+	        };
+	      }
+	    }
+	  }]);
 
-	        if (_note.isNew()) {
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button cancel-button secondary-action')
-	                .text(_t('confirm.cancel'));
+	  return Tokenizer;
+	}();
 
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button save-button action')
-	                .text(_t('note.save'));
+	var noopTest$1 = helpers.noopTest,
+	    edit$1 = helpers.edit,
+	    merge$2 = helpers.merge;
+	/**
+	 * Block-Level Grammar
+	 */
 
-	        } else {
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button status-button action');
+	var block = {
+	  newline: /^\n+/,
+	  code: /^( {4}[^\n]+\n*)+/,
+	  fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
+	  hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
+	  heading: /^ {0,3}(#{1,6}) +([^\n]*?)(?: +#+)? *(?:\n+|$)/,
+	  blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
+	  list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
+	  html: '^ {0,3}(?:' // optional indentation
+	  + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
+	  + '|comment[^\\n]*(\\n+|$)' // (2)
+	  + '|<\\?[\\s\\S]*?(?:\\?>\\n*|$)' // (3)
+	  + '|<![A-Z][\\s\\S]*?(?:>\\n*|$)' // (4)
+	  + '|<!\\[CDATA\\[[\\s\\S]*?(?:\\]\\]>\\n*|$)' // (5)
+	  + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:\\n{2,}|$)' // (6)
+	  + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) open tag
+	  + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) closing tag
+	  + ')',
+	  def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
+	  nptable: noopTest$1,
+	  table: noopTest$1,
+	  lheading: /^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)/,
+	  // regex template, placeholders will be replaced according to different paragraph
+	  // interruption rules of commonmark and the original markdown spec:
+	  _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html)[^\n]+)*)/,
+	  text: /^[^\n]+/
+	};
+	block._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
+	block._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
+	block.def = edit$1(block.def).replace('label', block._label).replace('title', block._title).getRegex();
+	block.bullet = /(?:[*+-]|\d{1,9}[.)])/;
+	block.item = /^( *)(bull) ?[^\n]*(?:\n(?!\1bull ?)[^\n]*)*/;
+	block.item = edit$1(block.item, 'gm').replace(/bull/g, block.bullet).getRegex();
+	block.list = edit$1(block.list).replace(/bull/g, block.bullet).replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))').replace('def', '\\n+(?=' + block.def.source + ')').getRegex();
+	block._tag = 'address|article|aside|base|basefont|blockquote|body|caption' + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption' + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe' + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option' + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr' + '|track|ul';
+	block._comment = /<!--(?!-?>)[\s\S]*?(?:-->|$)/;
+	block.html = edit$1(block.html, 'i').replace('comment', block._comment).replace('tag', block._tag).replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/).getRegex();
+	block.paragraph = edit$1(block._paragraph).replace('hr', block.hr).replace('heading', ' {0,3}#{1,6} ').replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
+	.replace('blockquote', ' {0,3}>').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+	.replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
+	.getRegex();
+	block.blockquote = edit$1(block.blockquote).replace('paragraph', block.paragraph).getRegex();
+	/**
+	 * Normal Block Grammar
+	 */
 
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button comment-button action')
-	                .text(_t('note.comment'));
-	        }
+	block.normal = merge$2({}, block);
+	/**
+	 * GFM Block Grammar
+	 */
 
+	block.gfm = merge$2({}, block.normal, {
+	  nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
+	  + ' {0,3}([-:]+ *\\|[-| :]*)' // Align
+	  + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)',
+	  // Cells
+	  table: '^ *\\|(.+)\\n' // Header
+	  + ' {0,3}\\|?( *[-:]+[-| :]*)' // Align
+	  + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells
 
-	        // update
-	        buttonSection = buttonSection
-	            .merge(buttonEnter);
+	});
+	block.gfm.nptable = edit$1(block.gfm.nptable).replace('hr', block.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+	.replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
+	.getRegex();
+	block.gfm.table = edit$1(block.gfm.table).replace('hr', block.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+	.replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
+	.getRegex();
+	/**
+	 * Pedantic grammar (original John Gruber's loose markdown specification)
+	 */
 
-	        buttonSection.select('.cancel-button')   // select and propagate data
-	            .on('click.cancel', clickCancel);
+	block.pedantic = merge$2({}, block.normal, {
+	  html: edit$1('^ *(?:comment *(?:\\n|\\s*$)' + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
+	  + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))').replace('comment', block._comment).replace(/tag/g, '(?!(?:' + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub' + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)' + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b').getRegex(),
+	  def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
+	  heading: /^ *(#{1,6}) *([^\n]+?) *(?:#+ *)?(?:\n+|$)/,
+	  fences: noopTest$1,
+	  // fences not supported
+	  paragraph: edit$1(block.normal._paragraph).replace('hr', block.hr).replace('heading', ' *#{1,6} *[^\n]').replace('lheading', block.lheading).replace('blockquote', ' {0,3}>').replace('|fences', '').replace('|list', '').replace('|html', '').getRegex()
+	});
+	/**
+	 * Inline-Level Grammar
+	 */
 
-	        buttonSection.select('.save-button')     // select and propagate data
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.save', clickSave);
+	var inline = {
+	  escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
+	  autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
+	  url: noopTest$1,
+	  tag: '^comment' + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
+	  + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
+	  + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
+	  + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
+	  + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>',
+	  // CDATA section
+	  link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
+	  reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
+	  nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
+	  reflinkSearch: 'reflink|nolink(?!\\()',
+	  strong: {
+	    start: /^(?:(\*\*(?=[*punctuation]))|\*\*)(?![\s])|__/,
+	    // (1) returns if starts w/ punctuation
+	    middle: /^\*\*(?:(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)|\*(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)*?\*)+?\*\*$|^__(?![\s])((?:(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)|_(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)*?_)+?)__$/,
+	    endAst: /[^punctuation\s]\*\*(?!\*)|[punctuation]\*\*(?!\*)(?:(?=[punctuation_\s]|$))/,
+	    // last char can't be punct, or final * must also be followed by punct (or endline)
+	    endUnd: /[^\s]__(?!_)(?:(?=[punctuation*\s])|$)/ // last char can't be a space, and final _ must preceed punct or \s (or endline)
 
-	        buttonSection.select('.status-button')   // select and propagate data
-	            .attr('disabled', (hasAuth ? null : true))
-	            .text(function(d) {
-	                var action = (d.status === 'open' ? 'close' : 'open');
-	                var andComment = (d.newComment ? '_comment' : '');
-	                return _t('note.' + action + andComment);
-	            })
-	            .on('click.status', clickStatus);
+	  },
+	  em: {
+	    start: /^(?:(\*(?=[punctuation]))|\*)(?![*\s])|_/,
+	    // (1) returns if starts w/ punctuation
+	    middle: /^\*(?:(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)|\*(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)*?\*)+?\*$|^_(?![_\s])(?:(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)|_(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)*?_)+?_$/,
+	    endAst: /[^punctuation\s]\*(?!\*)|[punctuation]\*(?!\*)(?:(?=[punctuation_\s]|$))/,
+	    // last char can't be punct, or final * must also be followed by punct (or endline)
+	    endUnd: /[^\s]_(?!_)(?:(?=[punctuation*\s])|$)/ // last char can't be a space, and final _ must preceed punct or \s (or endline)
 
-	        buttonSection.select('.comment-button')   // select and propagate data
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.comment', clickComment);
+	  },
+	  code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
+	  br: /^( {2,}|\\)\n(?!\s*$)/,
+	  del: noopTest$1,
+	  text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*]|\b_|$)|[^ ](?= {2,}\n)))/,
+	  punctuation: /^([\s*punctuation])/
+	}; // list of punctuation marks from common mark spec
+	// without * and _ to workaround cases with double emphasis
+
+	inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
+	inline.punctuation = edit$1(inline.punctuation).replace(/punctuation/g, inline._punctuation).getRegex(); // sequences em should skip over [title](link), `code`, <html>
+
+	inline._blockSkip = '\\[[^\\]]*?\\]\\([^\\)]*?\\)|`[^`]*?`|<[^>]*?>';
+	inline._overlapSkip = '__[^_]*?__|\\*\\*\\[^\\*\\]*?\\*\\*';
+	inline._comment = edit$1(block._comment).replace('(?:-->|$)', '-->').getRegex();
+	inline.em.start = edit$1(inline.em.start).replace(/punctuation/g, inline._punctuation).getRegex();
+	inline.em.middle = edit$1(inline.em.middle).replace(/punctuation/g, inline._punctuation).replace(/overlapSkip/g, inline._overlapSkip).getRegex();
+	inline.em.endAst = edit$1(inline.em.endAst, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
+	inline.em.endUnd = edit$1(inline.em.endUnd, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
+	inline.strong.start = edit$1(inline.strong.start).replace(/punctuation/g, inline._punctuation).getRegex();
+	inline.strong.middle = edit$1(inline.strong.middle).replace(/punctuation/g, inline._punctuation).replace(/overlapSkip/g, inline._overlapSkip).getRegex();
+	inline.strong.endAst = edit$1(inline.strong.endAst, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
+	inline.strong.endUnd = edit$1(inline.strong.endUnd, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
+	inline.blockSkip = edit$1(inline._blockSkip, 'g').getRegex();
+	inline.overlapSkip = edit$1(inline._overlapSkip, 'g').getRegex();
+	inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
+	inline._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
+	inline._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
+	inline.autolink = edit$1(inline.autolink).replace('scheme', inline._scheme).replace('email', inline._email).getRegex();
+	inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
+	inline.tag = edit$1(inline.tag).replace('comment', inline._comment).replace('attribute', inline._attribute).getRegex();
+	inline._label = /(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
+	inline._href = /<(?:\\[<>]?|[^\s<>\\])*>|[^\s\x00-\x1f]*/;
+	inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
+	inline.link = edit$1(inline.link).replace('label', inline._label).replace('href', inline._href).replace('title', inline._title).getRegex();
+	inline.reflink = edit$1(inline.reflink).replace('label', inline._label).getRegex();
+	inline.reflinkSearch = edit$1(inline.reflinkSearch, 'g').replace('reflink', inline.reflink).replace('nolink', inline.nolink).getRegex();
+	/**
+	 * Normal Inline Grammar
+	 */
 
+	inline.normal = merge$2({}, inline);
+	/**
+	 * Pedantic Inline Grammar
+	 */
 
-	        function isSaveDisabled(d) {
-	            return (hasAuth && d.status === 'open' && d.newComment) ? null : true;
-	        }
-	    }
+	inline.pedantic = merge$2({}, inline.normal, {
+	  strong: {
+	    start: /^__|\*\*/,
+	    middle: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
+	    endAst: /\*\*(?!\*)/g,
+	    endUnd: /__(?!_)/g
+	  },
+	  em: {
+	    start: /^_|\*/,
+	    middle: /^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,
+	    endAst: /\*(?!\*)/g,
+	    endUnd: /_(?!_)/g
+	  },
+	  link: edit$1(/^!?\[(label)\]\((.*?)\)/).replace('label', inline._label).getRegex(),
+	  reflink: edit$1(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace('label', inline._label).getRegex()
+	});
+	/**
+	 * GFM Inline Grammar
+	 */
 
+	inline.gfm = merge$2({}, inline.normal, {
+	  escape: edit$1(inline.escape).replace('])', '~|])').getRegex(),
+	  _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
+	  url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
+	  _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
+	  del: /^~+(?=\S)([\s\S]*?\S)~+/,
+	  text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*~]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))/
+	});
+	inline.gfm.url = edit$1(inline.gfm.url, 'i').replace('email', inline.gfm._extended_email).getRegex();
+	/**
+	 * GFM + Line Breaks Inline Grammar
+	 */
 
+	inline.breaks = merge$2({}, inline.gfm, {
+	  br: edit$1(inline.br).replace('{2,}', '*').getRegex(),
+	  text: edit$1(inline.gfm.text).replace('\\b_', '\\b_| {2,}\\n').replace(/\{2,\}/g, '*').getRegex()
+	});
+	var rules = {
+	  block: block,
+	  inline: inline
+	};
 
-	    function clickCancel(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.removeNote(d);
-	        }
-	        context.enter(modeBrowse(context));
-	        dispatch$1.call('change');
-	    }
+	var defaults$2 = defaults.defaults;
+	var block$1 = rules.block,
+	    inline$1 = rules.inline;
+	var repeatString$1 = helpers.repeatString;
+	/**
+	 * smartypants text replacement
+	 */
 
+	function smartypants(text) {
+	  return text // em-dashes
+	  .replace(/---/g, "\u2014") // en-dashes
+	  .replace(/--/g, "\u2013") // opening singles
+	  .replace(/(^|[-\u2014/(\[{"\s])'/g, "$1\u2018") // closing singles & apostrophes
+	  .replace(/'/g, "\u2019") // opening doubles
+	  .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, "$1\u201C") // closing doubles
+	  .replace(/"/g, "\u201D") // ellipses
+	  .replace(/\.{3}/g, "\u2026");
+	}
+	/**
+	 * mangle email addresses
+	 */
 
-	    function clickSave(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.postNoteCreate(d, function(err, note) {
-	                dispatch$1.call('change', note);
-	            });
-	        }
-	    }
 
+	function mangle(text) {
+	  var out = '',
+	      i,
+	      ch;
+	  var l = text.length;
 
-	    function clickStatus(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var osm = services.osm;
-	        if (osm) {
-	            var setStatus = (d.status === 'open' ? 'closed' : 'open');
-	            osm.postNoteUpdate(d, setStatus, function(err, note) {
-	                dispatch$1.call('change', note);
-	            });
-	        }
-	    }
+	  for (i = 0; i < l; i++) {
+	    ch = text.charCodeAt(i);
 
-	    function clickComment(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.postNoteUpdate(d, d.status, function(err, note) {
-	                dispatch$1.call('change', note);
-	            });
-	        }
+	    if (Math.random() > 0.5) {
+	      ch = 'x' + ch.toString(16);
 	    }
 
+	    out += '&#' + ch + ';';
+	  }
 
-	    noteEditor.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteEditor;
-	    };
-
-	    noteEditor.newNote = function(val) {
-	        if (!arguments.length) { return _newNote; }
-	        _newNote = val;
-	        return noteEditor;
-	    };
-
-
-	    return utilRebind(noteEditor, dispatch$1, 'on');
+	  return out;
 	}
+	/**
+	 * Block Lexer
+	 */
 
-	function modeSelectNote(context, selectedNoteID) {
-	    var mode = {
-	        id: 'select-note',
-	        button: 'browse'
-	    };
-
-	    var _keybinding = utilKeybinding('select-note');
-	    var _noteEditor = uiNoteEditor(context)
-	        .on('change', function() {
-	            context.map().pan([0,0]);  // trigger a redraw
-	            var note = checkSelectedID();
-	            if (!note) { return; }
-	            context.ui().sidebar
-	                .show(_noteEditor.note(note));
-	        });
 
-	    var _behaviors = [
-	        behaviorBreathe(),
-	        behaviorHover(context),
-	        behaviorSelect(context),
-	        behaviorLasso(context),
-	        modeDragNode(context).behavior,
-	        modeDragNote(context).behavior
-	    ];
+	var Lexer_1 = /*#__PURE__*/function () {
+	  function Lexer(options) {
+	    _classCallCheck(this, Lexer);
 
-	    var _newFeature = false;
+	    this.tokens = [];
+	    this.tokens.links = Object.create(null);
+	    this.options = options || defaults$2;
+	    this.options.tokenizer = this.options.tokenizer || new Tokenizer_1();
+	    this.tokenizer = this.options.tokenizer;
+	    this.tokenizer.options = this.options;
+	    var rules = {
+	      block: block$1.normal,
+	      inline: inline$1.normal
+	    };
 
+	    if (this.options.pedantic) {
+	      rules.block = block$1.pedantic;
+	      rules.inline = inline$1.pedantic;
+	    } else if (this.options.gfm) {
+	      rules.block = block$1.gfm;
 
-	    function checkSelectedID() {
-	        if (!services.osm) { return; }
-	        var note = services.osm.getNote(selectedNoteID);
-	        if (!note) {
-	            context.enter(modeBrowse(context));
-	        }
-	        return note;
+	      if (this.options.breaks) {
+	        rules.inline = inline$1.breaks;
+	      } else {
+	        rules.inline = inline$1.gfm;
+	      }
 	    }
 
+	    this.tokenizer.rules = rules;
+	  }
+	  /**
+	   * Expose Rules
+	   */
 
-	    // class the note as selected, or return to browse mode if the note is gone
-	    function selectNote(drawn) {
-	        if (!checkSelectedID()) { return; }
-
-	        var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
-
-	        if (selection.empty()) {
-	            // Return to browse mode if selected DOM elements have
-	            // disappeared because the user moved them out of view..
-	            var source = event && event.type === 'zoom' && event.sourceEvent;
-	            if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-	                context.enter(modeBrowse(context));
-	            }
-
-	        } else {
-	            selection
-	                .classed('selected', true);
-
-	            context.selectedNoteID(selectedNoteID);
-	        }
-	    }
 
+	  _createClass(Lexer, [{
+	    key: "lex",
 
-	    function esc() {
-	        if (context.container().select('.combobox').size()) { return; }
-	        context.enter(modeBrowse(context));
+	    /**
+	     * Preprocessing
+	     */
+	    value: function lex(src) {
+	      src = src.replace(/\r\n|\r/g, '\n').replace(/\t/g, '    ');
+	      this.blockTokens(src, this.tokens, true);
+	      this.inline(this.tokens);
+	      return this.tokens;
 	    }
+	    /**
+	     * Lexing
+	     */
 
+	  }, {
+	    key: "blockTokens",
+	    value: function blockTokens(src) {
+	      var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+	      var top = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;
+	      src = src.replace(/^ +$/gm, '');
+	      var token, i, l, lastToken;
+
+	      while (src) {
+	        // newline
+	        if (token = this.tokenizer.space(src)) {
+	          src = src.substring(token.raw.length);
+
+	          if (token.type) {
+	            tokens.push(token);
+	          }
 
-	    mode.zoomToSelected = function() {
-	        if (!services.osm) { return; }
-	        var note = services.osm.getNote(selectedNoteID);
-	        if (note) {
-	            context.map().centerZoomEase(note.loc, 20);
-	        }
-	    };
-
-
-	    mode.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return mode;
-	    };
+	          continue;
+	        } // code
 
 
-	    mode.enter = function() {
-	        var note = checkSelectedID();
-	        if (!note) { return; }
+	        if (token = this.tokenizer.code(src, tokens)) {
+	          src = src.substring(token.raw.length);
 
-	        _behaviors.forEach(context.install);
+	          if (token.type) {
+	            tokens.push(token);
+	          } else {
+	            lastToken = tokens[tokens.length - 1];
+	            lastToken.raw += '\n' + token.raw;
+	            lastToken.text += '\n' + token.text;
+	          }
 
-	        _keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on('⎋', esc, true);
+	          continue;
+	        } // fences
 
-	        select(document)
-	            .call(_keybinding);
 
-	        selectNote();
+	        if (token = this.tokenizer.fences(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // heading
 
-	        var sidebar = context.ui().sidebar;
-	        sidebar.show(_noteEditor.note(note).newNote(_newFeature));
 
-	        // expand the sidebar, avoid obscuring the note if needed
-	        sidebar.expand(sidebar.intersects(note.extent()));
+	        if (token = this.tokenizer.heading(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // table no leading pipe (gfm)
 
-	        context.map()
-	            .on('drawn.select', selectNote);
-	    };
 
+	        if (token = this.tokenizer.nptable(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // hr
 
-	    mode.exit = function() {
-	        _behaviors.forEach(context.uninstall);
 
-	        select(document)
-	            .call(_keybinding.unbind);
+	        if (token = this.tokenizer.hr(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // blockquote
 
-	        context.surface()
-	            .selectAll('.layer-notes .selected')
-	            .classed('selected hover', false);
 
-	        context.map()
-	            .on('drawn.select', null);
+	        if (token = this.tokenizer.blockquote(src)) {
+	          src = src.substring(token.raw.length);
+	          token.tokens = this.blockTokens(token.text, [], top);
+	          tokens.push(token);
+	          continue;
+	        } // list
 
-	        context.ui().sidebar
-	            .hide();
 
-	        context.selectedNoteID(null);
-	    };
+	        if (token = this.tokenizer.list(src)) {
+	          src = src.substring(token.raw.length);
+	          l = token.items.length;
 
+	          for (i = 0; i < l; i++) {
+	            token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
+	          }
 
-	    return mode;
-	}
+	          tokens.push(token);
+	          continue;
+	        } // html
 
-	function modeDragNote(context) {
-	    var mode = {
-	        id: 'drag-note',
-	        button: 'browse'
-	    };
 
-	    var edit = behaviorEdit(context);
+	        if (token = this.tokenizer.html(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // def
 
-	    var _nudgeInterval;
-	    var _lastLoc;
-	    var _note;    // most current note.. dragged note may have stale datum.
 
+	        if (top && (token = this.tokenizer.def(src))) {
+	          src = src.substring(token.raw.length);
 
-	    function startNudge(nudge) {
-	        if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-	        _nudgeInterval = window.setInterval(function() {
-	            context.map().pan(nudge);
-	            doMove(nudge);
-	        }, 50);
-	    }
+	          if (!this.tokens.links[token.tag]) {
+	            this.tokens.links[token.tag] = {
+	              href: token.href,
+	              title: token.title
+	            };
+	          }
 
+	          continue;
+	        } // table (gfm)
 
-	    function stopNudge() {
-	        if (_nudgeInterval) {
-	            window.clearInterval(_nudgeInterval);
-	            _nudgeInterval = null;
-	        }
-	    }
 
+	        if (token = this.tokenizer.table(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // lheading
 
-	    function origin(note) {
-	        return context.projection(note.loc);
-	    }
 
+	        if (token = this.tokenizer.lheading(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // top-level paragraph
 
-	    function start(note) {
-	        _note = note;
-	        var osm = services.osm;
-	        if (osm) {
-	            // Get latest note from cache.. The marker may have a stale datum bound to it
-	            // and dragging it around can sometimes delete the users note comment.
-	            _note = osm.getNote(_note.id);
-	        }
 
-	        context.surface().selectAll('.note-' + _note.id)
-	            .classed('active', true);
+	        if (top && (token = this.tokenizer.paragraph(src))) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // text
 
-	        context.perform(actionNoop());
-	        context.enter(mode);
-	        context.selectedNoteID(_note.id);
-	    }
 
+	        if (token = this.tokenizer.text(src, tokens)) {
+	          src = src.substring(token.raw.length);
 
-	    function move() {
-	        event.sourceEvent.stopPropagation();
-	        _lastLoc = context.projection.invert(event.point);
+	          if (token.type) {
+	            tokens.push(token);
+	          } else {
+	            lastToken = tokens[tokens.length - 1];
+	            lastToken.raw += '\n' + token.raw;
+	            lastToken.text += '\n' + token.text;
+	          }
 
-	        doMove();
-	        var nudge = geoViewportEdge(event.point, context.map().dimensions());
-	        if (nudge) {
-	            startNudge(nudge);
-	        } else {
-	            stopNudge();
+	          continue;
 	        }
-	    }
-
-
-	    function doMove(nudge) {
-	        nudge = nudge || [0, 0];
 
-	        var currPoint = (event && event.point) || context.projection(_lastLoc);
-	        var currMouse = geoVecSubtract(currPoint, nudge);
-	        var loc = context.projection.invert(currMouse);
+	        if (src) {
+	          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
 
-	        _note = _note.move(loc);
-
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.replaceNote(_note);  // update note cache
+	          if (this.options.silent) {
+	            console.error(errMsg);
+	            break;
+	          } else {
+	            throw new Error(errMsg);
+	          }
 	        }
+	      }
 
-	        context.replace(actionNoop());   // trigger redraw
-	    }
-
-
-	    function end() {
-	        context.replace(actionNoop());   // trigger redraw
-
-	        context
-	            .selectedNoteID(_note.id)
-	            .enter(modeSelectNote(context, _note.id));
+	      return tokens;
 	    }
+	  }, {
+	    key: "inline",
+	    value: function inline(tokens) {
+	      var i, j, k, l2, row, token;
+	      var l = tokens.length;
+
+	      for (i = 0; i < l; i++) {
+	        token = tokens[i];
+
+	        switch (token.type) {
+	          case 'paragraph':
+	          case 'text':
+	          case 'heading':
+	            {
+	              token.tokens = [];
+	              this.inlineTokens(token.text, token.tokens);
+	              break;
+	            }
 
+	          case 'table':
+	            {
+	              token.tokens = {
+	                header: [],
+	                cells: []
+	              }; // header
 
-	    var drag = behaviorDrag()
-	        .selector('.layer-touch.markers .target.note.new')
-	        .surface(context.container().select('.main-map').node())
-	        .origin(origin)
-	        .on('start', start)
-	        .on('move', move)
-	        .on('end', end);
-
-
-	    mode.enter = function() {
-	        context.install(edit);
-	    };
-
-
-	    mode.exit = function() {
-	        context.ui().sidebar.hover.cancel();
-	        context.uninstall(edit);
-
-	        context.surface()
-	            .selectAll('.active')
-	            .classed('active', false);
+	              l2 = token.header.length;
 
-	        stopNudge();
-	    };
+	              for (j = 0; j < l2; j++) {
+	                token.tokens.header[j] = [];
+	                this.inlineTokens(token.header[j], token.tokens.header[j]);
+	              } // cells
 
-	    mode.behavior = drag;
 
-	    return mode;
-	}
+	              l2 = token.cells.length;
 
-	function uiDataHeader() {
-	    var _datum;
+	              for (j = 0; j < l2; j++) {
+	                row = token.cells[j];
+	                token.tokens.cells[j] = [];
 
+	                for (k = 0; k < row.length; k++) {
+	                  token.tokens.cells[j][k] = [];
+	                  this.inlineTokens(row[k], token.tokens.cells[j][k]);
+	                }
+	              }
 
-	    function dataHeader(selection) {
-	        var header = selection.selectAll('.data-header')
-	            .data(
-	                (_datum ? [_datum] : []),
-	                function(d) { return d.__featurehash__; }
-	            );
+	              break;
+	            }
 
-	        header.exit()
-	            .remove();
+	          case 'blockquote':
+	            {
+	              this.inline(token.tokens);
+	              break;
+	            }
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'data-header');
+	          case 'list':
+	            {
+	              l2 = token.items.length;
 
-	        var iconEnter = headerEnter
-	            .append('div')
-	            .attr('class', 'data-header-icon');
+	              for (j = 0; j < l2; j++) {
+	                this.inline(token.items[j].tokens);
+	              }
 
-	        iconEnter
-	            .append('div')
-	            .attr('class', 'preset-icon-28')
-	            .call(svgIcon('#iD-icon-data', 'note-fill'));
+	              break;
+	            }
+	        }
+	      }
 
-	        headerEnter
-	            .append('div')
-	            .attr('class', 'data-header-label')
-	            .text(_t('map_data.layers.custom.title'));
+	      return tokens;
 	    }
+	    /**
+	     * Lexing/Compiling
+	     */
 
+	  }, {
+	    key: "inlineTokens",
+	    value: function inlineTokens(src) {
+	      var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+	      var inLink = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+	      var inRawBlock = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
+	      var prevChar = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : '';
+	      var token; // String with links masked to avoid interference with em and strong
 
-	    dataHeader.datum = function(val) {
-	        if (!arguments.length) { return _datum; }
-	        _datum = val;
-	        return this;
-	    };
-
-
-	    return dataHeader;
-	}
+	      var maskedSrc = src;
+	      var match; // Mask out reflinks
 
-	// This code assumes that the combobox values will not have duplicate entries.
-	// It is keyed on the `value` of the entry. Data should be an array of objects like:
-	//   [{
-	//       value:  'display text',  // required
-	//       title:  'hover text'     // optional
-	//   }, ...]
+	      if (this.tokens.links) {
+	        var links = Object.keys(this.tokens.links);
 
-	var _comboHideTimerID;
+	        if (links.length > 0) {
+	          while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
+	            if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
+	              maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString$1('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
+	            }
+	          }
+	        }
+	      } // Mask out other blocks
 
-	function uiCombobox(context, klass) {
-	    var dispatch$1 = dispatch('accept', 'cancel');
-	    var container = context.container();
 
-	    var _suggestions = [];
-	    var _data = [];
-	    var _fetched = {};
-	    var _selected = null;
-	    var _canAutocomplete = true;
-	    var _caseSensitive = false;
-	    var _cancelFetch = false;
-	    var _minItems = 2;
-	    var _tDown = 0;
-	    var _mouseEnterHandler, _mouseLeaveHandler;
-
-	    var _fetcher = function(val, cb) {
-	        cb(_data.filter(function(d) {
-	            var terms = d.terms || [];
-	            terms.push(d.value);
-	            return terms.some(function(term) {
-	                return term
-	                    .toString()
-	                    .toLowerCase()
-	                    .indexOf(val.toLowerCase()) !== -1;
-	            });
-	        }));
-	    };
+	      while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
+	        maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString$1('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
+	      }
 
-	    var combobox = function(input, attachTo) {
-	        if (!input || input.empty()) { return; }
-
-	        input
-	            .classed('combobox-input', true)
-	            .on('focus.combo-input', focus)
-	            .on('blur.combo-input', blur)
-	            .on('keydown.combo-input', keydown)
-	            .on('keyup.combo-input', keyup)
-	            .on('input.combo-input', change)
-	            .on('mousedown.combo-input', mousedown)
-	            .each(function() {
-	                var parent = this.parentNode;
-	                var sibling = this.nextSibling;
-
-	                select(parent).selectAll('.combobox-caret')
-	                    .filter(function(d) { return d === input.node(); })
-	                    .data([input.node()])
-	                    .enter()
-	                    .insert('div', function() { return sibling; })
-	                    .attr('class', 'combobox-caret')
-	                    .on('mousedown.combo-caret', function() {
-	                        event.preventDefault(); // don't steal focus from input
-	                        input.node().focus(); // focus the input as if it was clicked
-	                        mousedown();
-	                    })
-	                    .on('mouseup.combo-caret', function() {
-	                        event.preventDefault(); // don't steal focus from input
-	                        mouseup();
-	                    });
-	            });
+	      while (src) {
+	        // escape
+	        if (token = this.tokenizer.escape(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // tag
 
 
-	        function mousedown() {
-	            if (event.button !== 0) { return; }    // left click only
-	            _tDown = +new Date();
+	        if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
+	          src = src.substring(token.raw.length);
+	          inLink = token.inLink;
+	          inRawBlock = token.inRawBlock;
+	          tokens.push(token);
+	          continue;
+	        } // link
 
-	            // clear selection
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
-	            if (start !== end) {
-	                var val = utilGetSetValue(input);
-	                input.node().setSelectionRange(val.length, val.length);
-	                return;
-	            }
 
-	            input.on('mouseup.combo-input', mouseup);
-	        }
+	        if (token = this.tokenizer.link(src)) {
+	          src = src.substring(token.raw.length);
 
+	          if (token.type === 'link') {
+	            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+	          }
 
-	        function mouseup() {
-	            input.on('mouseup.combo-input', null);
-	            if (event.button !== 0) { return; }    // left click only
-	            if (input.node() !== document.activeElement) { return; }   // exit if this input is not focused
+	          tokens.push(token);
+	          continue;
+	        } // reflink, nolink
 
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
-	            if (start !== end) { return; }  // exit if user is selecting
-
-	            // not showing or showing for a different field - try to show it.
-	            var combo = container.selectAll('.combobox');
-	            if (combo.empty() || combo.datum() !== input.node()) {
-	                var tOrig = _tDown;
-	                window.setTimeout(function() {
-	                    if (tOrig !== _tDown) { return; }   // exit if user double clicked
-	                    fetchComboData('', function() {
-	                        show();
-	                        render();
-	                    });
-	                }, 250);
 
-	            } else {
-	                hide();
-	            }
-	        }
+	        if (token = this.tokenizer.reflink(src, this.tokens.links)) {
+	          src = src.substring(token.raw.length);
 
+	          if (token.type === 'link') {
+	            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+	          }
 
-	        function focus() {
-	            fetchComboData('');   // prefetch values (may warm taginfo cache)
-	        }
+	          tokens.push(token);
+	          continue;
+	        } // strong
 
 
-	        function blur() {
-	            _comboHideTimerID = window.setTimeout(hide, 75);
-	        }
+	        if (token = this.tokenizer.strong(src, maskedSrc, prevChar)) {
+	          src = src.substring(token.raw.length);
+	          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
+	          tokens.push(token);
+	          continue;
+	        } // em
 
 
-	        function show() {
-	            hide();   // remove any existing
+	        if (token = this.tokenizer.em(src, maskedSrc, prevChar)) {
+	          src = src.substring(token.raw.length);
+	          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
+	          tokens.push(token);
+	          continue;
+	        } // code
 
-	            container
-	                .insert('div', ':first-child')
-	                .datum(input.node())
-	                .attr('class', 'combobox' + (klass ? ' combobox-' + klass : ''))
-	                .style('position', 'absolute')
-	                .style('display', 'block')
-	                .style('left', '0px')
-	                .on('mousedown.combo-container', function () {
-	                    // prevent moving focus out of the input field
-	                    event.preventDefault();
-	                });
 
-	            container
-	                .on('scroll.combo-scroll', render, true);
-	        }
+	        if (token = this.tokenizer.codespan(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // br
 
 
-	        function hide() {
-	            if (_comboHideTimerID) {
-	                window.clearTimeout(_comboHideTimerID);
-	                _comboHideTimerID = undefined;
-	            }
+	        if (token = this.tokenizer.br(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // del (gfm)
 
-	            container.selectAll('.combobox')
-	                .remove();
 
-	            container
-	                .on('scroll.combo-scroll', null);
-	        }
+	        if (token = this.tokenizer.del(src)) {
+	          src = src.substring(token.raw.length);
+	          token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
+	          tokens.push(token);
+	          continue;
+	        } // autolink
 
 
-	        function keydown() {
-	            var shown = !container.selectAll('.combobox').empty();
-	            var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
+	        if (token = this.tokenizer.autolink(src, mangle)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // url (gfm)
 
-	            switch (event.keyCode) {
-	                case 8:   // ⌫ Backspace
-	                case 46:  // ⌦ Delete
-	                    event.stopPropagation();
-	                    _selected = null;
-	                    render();
-	                    input.on('input.combo-input', function() {
-	                        var start = input.property('selectionStart');
-	                        input.node().setSelectionRange(start, start);
-	                        input.on('input.combo-input', change);
-	                    });
-	                    break;
-
-	                case 9:   // ⇥ Tab
-	                    accept();
-	                    break;
-
-	                case 13:  // ↩ Return
-	                    event.preventDefault();
-	                    event.stopPropagation();
-	                    break;
-
-	                case 38:  // ↑ Up arrow
-	                    if (tagName === 'textarea' && !shown) { return; }
-	                    event.preventDefault();
-	                    if (tagName === 'input' && !shown) {
-	                        show();
-	                    }
-	                    nav(-1);
-	                    break;
-
-	                case 40:  // ↓ Down arrow
-	                    if (tagName === 'textarea' && !shown) { return; }
-	                    event.preventDefault();
-	                    if (tagName === 'input' && !shown) {
-	                        show();
-	                    }
-	                    nav(+1);
-	                    break;
-	            }
-	        }
 
+	        if (!inLink && (token = this.tokenizer.url(src, mangle))) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // text
 
-	        function keyup() {
-	            switch (event.keyCode) {
-	                case 27:  // ⎋ Escape
-	                    cancel();
-	                    break;
 
-	                case 13:  // ↩ Return
-	                    accept();
-	                    break;
-	            }
+	        if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
+	          src = src.substring(token.raw.length);
+	          prevChar = token.raw.slice(-1);
+	          tokens.push(token);
+	          continue;
 	        }
 
+	        if (src) {
+	          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
 
-	        // Called whenever the input value is changed (e.g. on typing)
-	        function change() {
-	            fetchComboData(value(), function() {
-	                _selected = null;
-	                var val = input.property('value');
-
-	                if (_suggestions.length) {
-	                    if (input.property('selectionEnd') === val.length) {
-	                        _selected = tryAutocomplete();
-	                    }
-
-	                    if (!_selected) {
-	                        _selected = val;
-	                    }
-	                }
-
-	                if (val.length) {
-	                    var combo = container.selectAll('.combobox');
-	                    if (combo.empty()) {
-	                        show();
-	                    }
-	                } else {
-	                    hide();
-	                }
-
-	                render();
-	            });
+	          if (this.options.silent) {
+	            console.error(errMsg);
+	            break;
+	          } else {
+	            throw new Error(errMsg);
+	          }
 	        }
+	      }
 
+	      return tokens;
+	    }
+	  }], [{
+	    key: "lex",
 
-	        // Called when the user presses up/down arrows to navigate the list
-	        function nav(dir) {
-	            if (_suggestions.length) {
-	                // try to determine previously selected index..
-	                var index = -1;
-	                for (var i = 0; i < _suggestions.length; i++) {
-	                    if (_selected && _suggestions[i].value === _selected) {
-	                        index = i;
-	                        break;
-	                    }
-	                }
-
-	                // pick new _selected
-	                index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
-	                _selected = _suggestions[index].value;
-	                input.property('value', _selected);
-	            }
+	    /**
+	     * Static Lex Method
+	     */
+	    value: function lex(src, options) {
+	      var lexer = new Lexer(options);
+	      return lexer.lex(src);
+	    }
+	    /**
+	     * Static Lex Inline Method
+	     */
 
-	            render();
-	            ensureVisible();
-	        }
+	  }, {
+	    key: "lexInline",
+	    value: function lexInline(src, options) {
+	      var lexer = new Lexer(options);
+	      return lexer.inlineTokens(src);
+	    }
+	  }, {
+	    key: "rules",
+	    get: function get() {
+	      return {
+	        block: block$1,
+	        inline: inline$1
+	      };
+	    }
+	  }]);
 
+	  return Lexer;
+	}();
 
-	        function ensureVisible() {
-	            var combo = container.selectAll('.combobox');
-	            if (combo.empty()) { return; }
+	var defaults$3 = defaults.defaults;
+	var cleanUrl$1 = helpers.cleanUrl,
+	    escape$2 = helpers.escape;
+	/**
+	 * Renderer
+	 */
 
-	            var containerRect = container.node().getBoundingClientRect();
-	            var comboRect = combo.node().getBoundingClientRect();
+	var Renderer_1 = /*#__PURE__*/function () {
+	  function Renderer(options) {
+	    _classCallCheck(this, Renderer);
 
-	            if (comboRect.bottom > containerRect.bottom) {
-	                var node = attachTo ? attachTo.node() : input.node();
-	                node.scrollIntoView({ behavior: 'instant', block: 'center' });
-	                render();
-	            }
+	    this.options = options || defaults$3;
+	  }
 
-	            // https://stackoverflow.com/questions/11039885/scrollintoview-causing-the-whole-page-to-move
-	            var selected = combo.selectAll('.combobox-option.selected').node();
-	            if (selected) {
-	                selected.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
-	            }
-	        }
+	  _createClass(Renderer, [{
+	    key: "code",
+	    value: function code(_code, infostring, escaped) {
+	      var lang = (infostring || '').match(/\S*/)[0];
 
+	      if (this.options.highlight) {
+	        var out = this.options.highlight(_code, lang);
 
-	        function value() {
-	            var value = input.property('value');
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
+	        if (out != null && out !== _code) {
+	          escaped = true;
+	          _code = out;
+	        }
+	      }
 
-	            if (start && end) {
-	                value = value.substring(0, start);
-	            }
+	      if (!lang) {
+	        return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+	      }
 
-	            return value;
-	        }
+	      return '<pre><code class="' + this.options.langPrefix + escape$2(lang, true) + '">' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+	    }
+	  }, {
+	    key: "blockquote",
+	    value: function blockquote(quote) {
+	      return '<blockquote>\n' + quote + '</blockquote>\n';
+	    }
+	  }, {
+	    key: "html",
+	    value: function html(_html) {
+	      return _html;
+	    }
+	  }, {
+	    key: "heading",
+	    value: function heading(text, level, raw, slugger) {
+	      if (this.options.headerIds) {
+	        return '<h' + level + ' id="' + this.options.headerPrefix + slugger.slug(raw) + '">' + text + '</h' + level + '>\n';
+	      } // ignore IDs
 
 
-	        function fetchComboData(v, cb) {
-	            _cancelFetch = false;
+	      return '<h' + level + '>' + text + '</h' + level + '>\n';
+	    }
+	  }, {
+	    key: "hr",
+	    value: function hr() {
+	      return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
+	    }
+	  }, {
+	    key: "list",
+	    value: function list(body, ordered, start) {
+	      var type = ordered ? 'ol' : 'ul',
+	          startatt = ordered && start !== 1 ? ' start="' + start + '"' : '';
+	      return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
+	    }
+	  }, {
+	    key: "listitem",
+	    value: function listitem(text) {
+	      return '<li>' + text + '</li>\n';
+	    }
+	  }, {
+	    key: "checkbox",
+	    value: function checkbox(checked) {
+	      return '<input ' + (checked ? 'checked="" ' : '') + 'disabled="" type="checkbox"' + (this.options.xhtml ? ' /' : '') + '> ';
+	    }
+	  }, {
+	    key: "paragraph",
+	    value: function paragraph(text) {
+	      return '<p>' + text + '</p>\n';
+	    }
+	  }, {
+	    key: "table",
+	    value: function table(header, body) {
+	      if (body) body = '<tbody>' + body + '</tbody>';
+	      return '<table>\n' + '<thead>\n' + header + '</thead>\n' + body + '</table>\n';
+	    }
+	  }, {
+	    key: "tablerow",
+	    value: function tablerow(content) {
+	      return '<tr>\n' + content + '</tr>\n';
+	    }
+	  }, {
+	    key: "tablecell",
+	    value: function tablecell(content, flags) {
+	      var type = flags.header ? 'th' : 'td';
+	      var tag = flags.align ? '<' + type + ' align="' + flags.align + '">' : '<' + type + '>';
+	      return tag + content + '</' + type + '>\n';
+	    } // span level renderer
 
-	            _fetcher.call(input, v, function(results) {
-	                // already chose a value, don't overwrite or autocomplete it
-	                if (_cancelFetch) { return; }
+	  }, {
+	    key: "strong",
+	    value: function strong(text) {
+	      return '<strong>' + text + '</strong>';
+	    }
+	  }, {
+	    key: "em",
+	    value: function em(text) {
+	      return '<em>' + text + '</em>';
+	    }
+	  }, {
+	    key: "codespan",
+	    value: function codespan(text) {
+	      return '<code>' + text + '</code>';
+	    }
+	  }, {
+	    key: "br",
+	    value: function br() {
+	      return this.options.xhtml ? '<br/>' : '<br>';
+	    }
+	  }, {
+	    key: "del",
+	    value: function del(text) {
+	      return '<del>' + text + '</del>';
+	    }
+	  }, {
+	    key: "link",
+	    value: function link(href, title, text) {
+	      href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
 
-	                _suggestions = results;
-	                results.forEach(function(d) { _fetched[d.value] = d; });
+	      if (href === null) {
+	        return text;
+	      }
 
-	                if (cb) {
-	                    cb();
-	                }
-	            });
-	        }
+	      var out = '<a href="' + escape$2(href) + '"';
 
+	      if (title) {
+	        out += ' title="' + title + '"';
+	      }
 
-	        function tryAutocomplete() {
-	            if (!_canAutocomplete) { return; }
+	      out += '>' + text + '</a>';
+	      return out;
+	    }
+	  }, {
+	    key: "image",
+	    value: function image(href, title, text) {
+	      href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
 
-	            var val = _caseSensitive ? value() : value().toLowerCase();
-	            if (!val) { return; }
+	      if (href === null) {
+	        return text;
+	      }
 
-	            // Don't autocomplete if user is typing a number - #4935
-	            if (!isNaN(parseFloat(val)) && isFinite(val)) { return; }
+	      var out = '<img src="' + href + '" alt="' + text + '"';
 
-	            var bestIndex = -1;
-	            for (var i = 0; i < _suggestions.length; i++) {
-	                var suggestion = _suggestions[i].value;
-	                var compare = _caseSensitive ? suggestion : suggestion.toLowerCase();
+	      if (title) {
+	        out += ' title="' + title + '"';
+	      }
 
-	                // if search string matches suggestion exactly, pick it..
-	                if (compare === val) {
-	                    bestIndex = i;
-	                    break;
+	      out += this.options.xhtml ? '/>' : '>';
+	      return out;
+	    }
+	  }, {
+	    key: "text",
+	    value: function text(_text) {
+	      return _text;
+	    }
+	  }]);
 
-	                // otherwise lock in the first result that starts with the search string..
-	                } else if (bestIndex === -1 && compare.indexOf(val) === 0) {
-	                    bestIndex = i;
-	                }
-	            }
+	  return Renderer;
+	}();
 
-	            if (bestIndex !== -1) {
-	                var bestVal = _suggestions[bestIndex].value;
-	                input.property('value', bestVal);
-	                input.node().setSelectionRange(val.length, bestVal.length);
-	                return bestVal;
-	            }
-	        }
+	/**
+	 * TextRenderer
+	 * returns only the textual part of the token
+	 */
+	var TextRenderer_1 = /*#__PURE__*/function () {
+	  function TextRenderer() {
+	    _classCallCheck(this, TextRenderer);
+	  }
 
+	  _createClass(TextRenderer, [{
+	    key: "strong",
+	    // no need for block level renderers
+	    value: function strong(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "em",
+	    value: function em(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "codespan",
+	    value: function codespan(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "del",
+	    value: function del(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "html",
+	    value: function html(text) {
+	      return text;
+	    }
+	  }, {
+	    key: "text",
+	    value: function text(_text) {
+	      return _text;
+	    }
+	  }, {
+	    key: "link",
+	    value: function link(href, title, text) {
+	      return '' + text;
+	    }
+	  }, {
+	    key: "image",
+	    value: function image(href, title, text) {
+	      return '' + text;
+	    }
+	  }, {
+	    key: "br",
+	    value: function br() {
+	      return '';
+	    }
+	  }]);
 
-	        function render() {
-	            if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
-	                hide();
-	                return;
-	            }
+	  return TextRenderer;
+	}();
 
-	            var shown = !container.selectAll('.combobox').empty();
-	            if (!shown) { return; }
-
-	            var combo = container.selectAll('.combobox');
-	            var options = combo.selectAll('.combobox-option')
-	                .data(_suggestions, function(d) { return d.value; });
-
-	            options.exit()
-	                .remove();
-
-	            // enter/update
-	            options.enter()
-	                .append('a')
-	                .attr('class', 'combobox-option')
-	                .attr('title', function(d) { return d.title; })
-	                .text(function(d) { return d.display || d.value; })
-	                .on('mouseenter', _mouseEnterHandler)
-	                .on('mouseleave', _mouseLeaveHandler)
-	                .merge(options)
-	                .classed('selected', function(d) { return d.value === _selected; })
-	                .on('click.combo-option', accept)
-	                .order();
-
-	            var node = attachTo ? attachTo.node() : input.node();
-	            var containerRect = container.node().getBoundingClientRect();
-	            var rect = node.getBoundingClientRect();
-
-	            combo
-	                .style('left', (rect.left + 5 - containerRect.left) + 'px')
-	                .style('width', (rect.width - 10) + 'px')
-	                .style('top', (rect.height + rect.top - containerRect.top) + 'px');
-	        }
-
-
-	        // Dispatches an 'accept' event
-	        // Then hides the combobox.
-	        function accept(d) {
-	            _cancelFetch = true;
-	            var thiz = input.node();
-
-	            if (d) {   // user clicked on a suggestion
-	                utilGetSetValue(input, d.value);    // replace field contents
-	                utilTriggerEvent(input, 'change');
-	            }
+	/**
+	 * Slugger generates header id
+	 */
+	var Slugger_1 = /*#__PURE__*/function () {
+	  function Slugger() {
+	    _classCallCheck(this, Slugger);
 
-	            // clear (and keep) selection
-	            var val = utilGetSetValue(input);
-	            thiz.setSelectionRange(val.length, val.length);
+	    this.seen = {};
+	  }
 
-	            d = _fetched[val];
-	            dispatch$1.call('accept', thiz, d, val);
-	            hide();
-	        }
+	  _createClass(Slugger, [{
+	    key: "serialize",
+	    value: function serialize(value) {
+	      return value.toLowerCase().trim() // remove html tags
+	      .replace(/<[!\/a-z].*?>/ig, '') // remove unwanted chars
+	      .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '').replace(/\s/g, '-');
+	    }
+	    /**
+	     * Finds the next safe (unique) slug to use
+	     */
 
+	  }, {
+	    key: "getNextSafeSlug",
+	    value: function getNextSafeSlug(originalSlug, isDryRun) {
+	      var slug = originalSlug;
+	      var occurenceAccumulator = 0;
 
-	        // Dispatches an 'cancel' event
-	        // Then hides the combobox.
-	        function cancel() {
-	            _cancelFetch = true;
-	            var thiz = input.node();
+	      if (this.seen.hasOwnProperty(slug)) {
+	        occurenceAccumulator = this.seen[originalSlug];
 
-	            // clear (and remove) selection, and replace field contents
-	            var val = utilGetSetValue(input);
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
-	            val = val.slice(0, start) + val.slice(end);
-	            utilGetSetValue(input, val);
-	            thiz.setSelectionRange(val.length, val.length);
+	        do {
+	          occurenceAccumulator++;
+	          slug = originalSlug + '-' + occurenceAccumulator;
+	        } while (this.seen.hasOwnProperty(slug));
+	      }
 
-	            dispatch$1.call('cancel', thiz);
-	            hide();
-	        }
+	      if (!isDryRun) {
+	        this.seen[originalSlug] = occurenceAccumulator;
+	        this.seen[slug] = 0;
+	      }
 
-	    };
+	      return slug;
+	    }
+	    /**
+	     * Convert string to unique id
+	     * @param {object} options
+	     * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
+	     */
 
+	  }, {
+	    key: "slug",
+	    value: function slug(value) {
+	      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+	      var slug = this.serialize(value);
+	      return this.getNextSafeSlug(slug, options.dryrun);
+	    }
+	  }]);
 
-	    combobox.canAutocomplete = function(val) {
-	        if (!arguments.length) { return _canAutocomplete; }
-	        _canAutocomplete = val;
-	        return combobox;
-	    };
+	  return Slugger;
+	}();
 
-	    combobox.caseSensitive = function(val) {
-	        if (!arguments.length) { return _caseSensitive; }
-	        _caseSensitive = val;
-	        return combobox;
-	    };
+	var defaults$4 = defaults.defaults;
+	var unescape$2 = helpers.unescape;
+	/**
+	 * Parsing & Compiling
+	 */
 
-	    combobox.data = function(val) {
-	        if (!arguments.length) { return _data; }
-	        _data = val;
-	        return combobox;
-	    };
+	var Parser_1 = /*#__PURE__*/function () {
+	  function Parser(options) {
+	    _classCallCheck(this, Parser);
 
-	    combobox.fetcher = function(val) {
-	        if (!arguments.length) { return _fetcher; }
-	        _fetcher = val;
-	        return combobox;
-	    };
+	    this.options = options || defaults$4;
+	    this.options.renderer = this.options.renderer || new Renderer_1();
+	    this.renderer = this.options.renderer;
+	    this.renderer.options = this.options;
+	    this.textRenderer = new TextRenderer_1();
+	    this.slugger = new Slugger_1();
+	  }
+	  /**
+	   * Static Parse Method
+	   */
 
-	    combobox.minItems = function(val) {
-	        if (!arguments.length) { return _minItems; }
-	        _minItems = val;
-	        return combobox;
-	    };
 
-	    combobox.itemsMouseEnter = function(val) {
-	        if (!arguments.length) { return _mouseEnterHandler; }
-	        _mouseEnterHandler = val;
-	        return combobox;
-	    };
+	  _createClass(Parser, [{
+	    key: "parse",
 
-	    combobox.itemsMouseLeave = function(val) {
-	        if (!arguments.length) { return _mouseLeaveHandler; }
-	        _mouseLeaveHandler = val;
-	        return combobox;
-	    };
+	    /**
+	     * Parse Loop
+	     */
+	    value: function parse(tokens) {
+	      var top = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
+	      var out = '',
+	          i,
+	          j,
+	          k,
+	          l2,
+	          l3,
+	          row,
+	          cell,
+	          header,
+	          body,
+	          token,
+	          ordered,
+	          start,
+	          loose,
+	          itemBody,
+	          item,
+	          checked,
+	          task,
+	          checkbox;
+	      var l = tokens.length;
+
+	      for (i = 0; i < l; i++) {
+	        token = tokens[i];
+
+	        switch (token.type) {
+	          case 'space':
+	            {
+	              continue;
+	            }
 
-	    return utilRebind(combobox, dispatch$1, 'on');
-	}
+	          case 'hr':
+	            {
+	              out += this.renderer.hr();
+	              continue;
+	            }
 
+	          case 'heading':
+	            {
+	              out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$2(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
+	              continue;
+	            }
 
-	uiCombobox.off = function(input, context) {
-	    input
-	        .on('focus.combo-input', null)
-	        .on('blur.combo-input', null)
-	        .on('keydown.combo-input', null)
-	        .on('keyup.combo-input', null)
-	        .on('input.combo-input', null)
-	        .on('mousedown.combo-input', null)
-	        .on('mouseup.combo-input', null);
+	          case 'code':
+	            {
+	              out += this.renderer.code(token.text, token.lang, token.escaped);
+	              continue;
+	            }
 
+	          case 'table':
+	            {
+	              header = ''; // header
 
-	    context.container()
-	        .on('scroll.combo-scroll', null);
-	};
+	              cell = '';
+	              l2 = token.header.length;
 
-	// toggles the visibility of ui elements, using a combination of the
-	// hide class, which sets display=none, and a d3 transition for opacity.
-	// this will cause blinking when called repeatedly, so check that the
-	// value actually changes between calls.
-	function uiToggle(show, callback) {
-	    return function(selection) {
-	        selection
-	            .style('opacity', show ? 0 : 1)
-	            .classed('hide', false)
-	            .transition()
-	            .style('opacity', show ? 1 : 0)
-	            .on('end', function() {
-	                select(this)
-	                    .classed('hide', !show)
-	                    .style('opacity', null);
-	                if (callback) { callback.apply(this); }
-	            });
-	    };
-	}
+	              for (j = 0; j < l2; j++) {
+	                cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
+	                  header: true,
+	                  align: token.align[j]
+	                });
+	              }
 
-	function uiDisclosure(context, key, expandedDefault) {
-	    var dispatch$1 = dispatch('toggled');
-	    var _expanded;
-	    var _title = utilFunctor('');
-	    var _updatePreference = true;
-	    var _content = function () {};
+	              header += this.renderer.tablerow(cell);
+	              body = '';
+	              l2 = token.cells.length;
 
+	              for (j = 0; j < l2; j++) {
+	                row = token.tokens.cells[j];
+	                cell = '';
+	                l3 = row.length;
 
-	    var disclosure = function(selection) {
+	                for (k = 0; k < l3; k++) {
+	                  cell += this.renderer.tablecell(this.parseInline(row[k]), {
+	                    header: false,
+	                    align: token.align[k]
+	                  });
+	                }
 
-	        if (_expanded === undefined || _expanded === null) {
-	            // loading _expanded here allows it to be reset by calling `disclosure.expanded(null)`
+	                body += this.renderer.tablerow(cell);
+	              }
 
-	            var preference = corePreferences('disclosure.' + key + '.expanded');
-	            _expanded = preference === null ? !!expandedDefault : (preference === 'true');
-	        }
+	              out += this.renderer.table(header, body);
+	              continue;
+	            }
 
-	        var hideToggle = selection.selectAll('.hide-toggle-' + key)
-	            .data([0]);
+	          case 'blockquote':
+	            {
+	              body = this.parse(token.tokens);
+	              out += this.renderer.blockquote(body);
+	              continue;
+	            }
 
-	        // enter
-	        var hideToggleEnter = hideToggle.enter()
-	            .append('a')
-	            .attr('href', '#')
-	            .attr('class', 'hide-toggle hide-toggle-' + key)
-	            .call(svgIcon('', 'pre-text', 'hide-toggle-icon'));
+	          case 'list':
+	            {
+	              ordered = token.ordered;
+	              start = token.start;
+	              loose = token.loose;
+	              l2 = token.items.length;
+	              body = '';
+
+	              for (j = 0; j < l2; j++) {
+	                item = token.items[j];
+	                checked = item.checked;
+	                task = item.task;
+	                itemBody = '';
+
+	                if (item.task) {
+	                  checkbox = this.renderer.checkbox(checked);
+
+	                  if (loose) {
+	                    if (item.tokens.length > 0 && item.tokens[0].type === 'text') {
+	                      item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
+
+	                      if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
+	                        item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
+	                      }
+	                    } else {
+	                      item.tokens.unshift({
+	                        type: 'text',
+	                        text: checkbox
+	                      });
+	                    }
+	                  } else {
+	                    itemBody += checkbox;
+	                  }
+	                }
 
-	        hideToggleEnter
-	            .append('span')
-	            .attr('class', 'hide-toggle-text');
+	                itemBody += this.parse(item.tokens, loose);
+	                body += this.renderer.listitem(itemBody, task, checked);
+	              }
 
-	        // update
-	        hideToggle = hideToggleEnter
-	            .merge(hideToggle);
+	              out += this.renderer.list(body, ordered, start);
+	              continue;
+	            }
 
-	        hideToggle
-	            .on('click', toggle)
-	            .classed('expanded', _expanded);
+	          case 'html':
+	            {
+	              // TODO parse inline content if parameter markdown=1
+	              out += this.renderer.html(token.text);
+	              continue;
+	            }
 
-	        hideToggle.selectAll('.hide-toggle-text')
-	            .text(_title());
+	          case 'paragraph':
+	            {
+	              out += this.renderer.paragraph(this.parseInline(token.tokens));
+	              continue;
+	            }
 
-	        hideToggle.selectAll('.hide-toggle-icon')
-	            .attr('xlink:href', _expanded ? '#iD-icon-down'
-	                : (_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'
-	            );
+	          case 'text':
+	            {
+	              body = token.tokens ? this.parseInline(token.tokens) : token.text;
 
+	              while (i + 1 < l && tokens[i + 1].type === 'text') {
+	                token = tokens[++i];
+	                body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
+	              }
 
-	        var wrap = selection.selectAll('.disclosure-wrap')
-	            .data([0]);
+	              out += top ? this.renderer.paragraph(body) : body;
+	              continue;
+	            }
 
-	        // enter/update
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'disclosure-wrap disclosure-wrap-' + key)
-	            .merge(wrap)
-	            .classed('hide', !_expanded);
+	          default:
+	            {
+	              var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-	        if (_expanded) {
-	            wrap
-	                .call(_content);
+	              if (this.options.silent) {
+	                console.error(errMsg);
+	                return;
+	              } else {
+	                throw new Error(errMsg);
+	              }
+	            }
 	        }
+	      }
 
+	      return out;
+	    }
+	    /**
+	     * Parse Inline Tokens
+	     */
 
-	        function toggle() {
-	            event.preventDefault();
+	  }, {
+	    key: "parseInline",
+	    value: function parseInline(tokens, renderer) {
+	      renderer = renderer || this.renderer;
+	      var out = '',
+	          i,
+	          token;
+	      var l = tokens.length;
+
+	      for (i = 0; i < l; i++) {
+	        token = tokens[i];
+
+	        switch (token.type) {
+	          case 'escape':
+	            {
+	              out += renderer.text(token.text);
+	              break;
+	            }
 
-	            _expanded = !_expanded;
+	          case 'html':
+	            {
+	              out += renderer.html(token.text);
+	              break;
+	            }
 
-	            if (_updatePreference) {
-	                corePreferences('disclosure.' + key + '.expanded', _expanded);
+	          case 'link':
+	            {
+	              out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
+	              break;
 	            }
 
-	            hideToggle
-	                .classed('expanded', _expanded);
+	          case 'image':
+	            {
+	              out += renderer.image(token.href, token.title, token.text);
+	              break;
+	            }
 
-	            hideToggle.selectAll('.hide-toggle-icon')
-	                .attr('xlink:href', _expanded ? '#iD-icon-down'
-	                    : (_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'
-	                );
+	          case 'strong':
+	            {
+	              out += renderer.strong(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	            wrap
-	                .call(uiToggle(_expanded));
+	          case 'em':
+	            {
+	              out += renderer.em(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	            if (_expanded) {
-	                wrap
-	                    .call(_content);
+	          case 'codespan':
+	            {
+	              out += renderer.codespan(token.text);
+	              break;
 	            }
 
-	            dispatch$1.call('toggled', this, _expanded);
-	        }
-	    };
+	          case 'br':
+	            {
+	              out += renderer.br();
+	              break;
+	            }
 
+	          case 'del':
+	            {
+	              out += renderer.del(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	    disclosure.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = utilFunctor(val);
-	        return disclosure;
-	    };
+	          case 'text':
+	            {
+	              out += renderer.text(token.text);
+	              break;
+	            }
 
+	          default:
+	            {
+	              var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-	    disclosure.expanded = function(val) {
-	        if (!arguments.length) { return _expanded; }
-	        _expanded = val;
-	        return disclosure;
-	    };
+	              if (this.options.silent) {
+	                console.error(errMsg);
+	                return;
+	              } else {
+	                throw new Error(errMsg);
+	              }
+	            }
+	        }
+	      }
 
+	      return out;
+	    }
+	  }], [{
+	    key: "parse",
+	    value: function parse(tokens, options) {
+	      var parser = new Parser(options);
+	      return parser.parse(tokens);
+	    }
+	    /**
+	     * Static Parse Inline Method
+	     */
 
-	    disclosure.updatePreference = function(val) {
-	        if (!arguments.length) { return _updatePreference; }
-	        _updatePreference = val;
-	        return disclosure;
-	    };
+	  }, {
+	    key: "parseInline",
+	    value: function parseInline(tokens, options) {
+	      var parser = new Parser(options);
+	      return parser.parseInline(tokens);
+	    }
+	  }]);
 
+	  return Parser;
+	}();
+
+	var merge$3 = helpers.merge,
+	    checkSanitizeDeprecation$1 = helpers.checkSanitizeDeprecation,
+	    escape$3 = helpers.escape;
+	var getDefaults = defaults.getDefaults,
+	    changeDefaults = defaults.changeDefaults,
+	    defaults$5 = defaults.defaults;
+	/**
+	 * Marked
+	 */
 
-	    disclosure.content = function(val) {
-	        if (!arguments.length) { return _content; }
-	        _content = val;
-	        return disclosure;
-	    };
+	function marked(src, opt, callback) {
+	  // throw error in case of non string input
+	  if (typeof src === 'undefined' || src === null) {
+	    throw new Error('marked(): input parameter is undefined or null');
+	  }
 
+	  if (typeof src !== 'string') {
+	    throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+	  }
 
-	    return utilRebind(disclosure, dispatch$1, 'on');
-	}
+	  if (typeof opt === 'function') {
+	    callback = opt;
+	    opt = null;
+	  }
 
-	// A unit of controls or info to be used in a layout, such as within a pane.
-	// Can be labeled and collapsible.
-	function uiSection(id, context) {
+	  opt = merge$3({}, marked.defaults, opt || {});
+	  checkSanitizeDeprecation$1(opt);
 
-	    var _classes = utilFunctor('');
-	    var _shouldDisplay;
-	    var _content;
+	  if (callback) {
+	    var highlight = opt.highlight;
+	    var tokens;
 
-	    var _disclosure;
-	    var _title;
-	    var _expandedByDefault = utilFunctor(true);
-	    var _disclosureContent;
-	    var _disclosureExpanded;
+	    try {
+	      tokens = Lexer_1.lex(src, opt);
+	    } catch (e) {
+	      return callback(e);
+	    }
 
-	    var _containerSelection = select(null);
+	    var done = function done(err) {
+	      var out;
 
-	    var section = {
-	        id: id
-	    };
+	      if (!err) {
+	        try {
+	          out = Parser_1.parse(tokens, opt);
+	        } catch (e) {
+	          err = e;
+	        }
+	      }
 
-	    section.classes = function(val) {
-	        if (!arguments.length) { return _classes; }
-	        _classes = utilFunctor(val);
-	        return section;
+	      opt.highlight = highlight;
+	      return err ? callback(err) : callback(null, out);
 	    };
 
-	    section.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = utilFunctor(val);
-	        return section;
-	    };
+	    if (!highlight || highlight.length < 3) {
+	      return done();
+	    }
 
-	    section.expandedByDefault = function(val) {
-	        if (!arguments.length) { return _expandedByDefault; }
-	        _expandedByDefault = utilFunctor(val);
-	        return section;
-	    };
+	    delete opt.highlight;
+	    if (!tokens.length) return done();
+	    var pending = 0;
+	    marked.walkTokens(tokens, function (token) {
+	      if (token.type === 'code') {
+	        pending++;
+	        setTimeout(function () {
+	          highlight(token.text, token.lang, function (err, code) {
+	            if (err) {
+	              return done(err);
+	            }
 
-	    section.shouldDisplay = function(val) {
-	        if (!arguments.length) { return _shouldDisplay; }
-	        _shouldDisplay = utilFunctor(val);
-	        return section;
-	    };
+	            if (code != null && code !== token.text) {
+	              token.text = code;
+	              token.escaped = true;
+	            }
 
-	    section.content = function(val) {
-	        if (!arguments.length) { return _content; }
-	        _content = val;
-	        return section;
-	    };
+	            pending--;
 
-	    section.disclosureContent = function(val) {
-	        if (!arguments.length) { return _disclosureContent; }
-	        _disclosureContent = val;
-	        return section;
-	    };
+	            if (pending === 0) {
+	              done();
+	            }
+	          });
+	        }, 0);
+	      }
+	    });
 
-	    section.disclosureExpanded = function(val) {
-	        if (!arguments.length) { return _disclosureExpanded; }
-	        _disclosureExpanded = val;
-	        return section;
-	    };
+	    if (pending === 0) {
+	      done();
+	    }
 
-	    // may be called multiple times
-	    section.render = function(selection) {
+	    return;
+	  }
 
-	        _containerSelection = selection
-	            .selectAll('.section-' + id)
-	            .data([0]);
+	  try {
+	    var _tokens = Lexer_1.lex(src, opt);
 
-	        var sectionEnter = _containerSelection
-	            .enter()
-	            .append('div')
-	            .attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
+	    if (opt.walkTokens) {
+	      marked.walkTokens(_tokens, opt.walkTokens);
+	    }
 
-	        _containerSelection = sectionEnter
-	            .merge(_containerSelection);
+	    return Parser_1.parse(_tokens, opt);
+	  } catch (e) {
+	    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-	        _containerSelection
-	            .call(renderContent);
-	    };
+	    if (opt.silent) {
+	      return '<p>An error occurred:</p><pre>' + escape$3(e.message + '', true) + '</pre>';
+	    }
 
-	    section.reRender = function() {
-	        _containerSelection
-	            .call(renderContent);
-	    };
+	    throw e;
+	  }
+	}
+	/**
+	 * Options
+	 */
 
-	    section.selection = function() {
-	        return _containerSelection;
-	    };
 
-	    section.disclosure = function() {
-	        return _disclosure;
-	    };
+	marked.options = marked.setOptions = function (opt) {
+	  merge$3(marked.defaults, opt);
+	  changeDefaults(marked.defaults);
+	  return marked;
+	};
 
-	    // may be called multiple times
-	    function renderContent(selection) {
-	        if (_shouldDisplay) {
-	            var shouldDisplay = _shouldDisplay();
-	            selection.classed('hide', !shouldDisplay);
-	            if (!shouldDisplay) {
-	                selection.html('');
-	                return;
-	            }
-	        }
+	marked.getDefaults = getDefaults;
+	marked.defaults = defaults$5;
+	/**
+	 * Use Extension
+	 */
 
-	        if (_disclosureContent) {
-	            if (!_disclosure) {
-	                _disclosure = uiDisclosure(context, id.replace(/-/g, '_'), _expandedByDefault())
-	                    .title(_title || '')
-	                    /*.on('toggled', function(expanded) {
-	                        if (expanded) { selection.node().parentNode.scrollTop += 200; }
-	                    })*/
-	                    .content(_disclosureContent);
-	            }
-	            if (_disclosureExpanded !== undefined) {
-	                _disclosure.expanded(_disclosureExpanded);
-	                _disclosureExpanded = undefined;
-	            }
-	            selection
-	                .call(_disclosure);
+	marked.use = function (extension) {
+	  var opts = merge$3({}, extension);
 
-	            return;
-	        }
+	  if (extension.renderer) {
+	    (function () {
+	      var renderer = marked.defaults.renderer || new Renderer_1();
 
-	        if (_content) {
-	            selection
-	                .call(_content);
-	        }
-	    }
+	      var _loop = function _loop(prop) {
+	        var prevRenderer = renderer[prop];
 
-	    return section;
-	}
+	        renderer[prop] = function () {
+	          for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+	            args[_key] = arguments[_key];
+	          }
 
-	// Pass `which` object of the form:
-	// {
-	//   key: 'string',     // required
-	//   value: 'string'    // optional
-	// }
-	//   -or-
-	// {
-	//   rtype: 'string'    // relation type  (e.g. 'multipolygon')
-	// }
-	//   -or-
-	// {
-	//   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-	// }
-	//
-	function uiTagReference(what) {
-	    var wikibase = what.qid ? services.wikidata : services.osmWikibase;
-	    var tagReference = {};
+	          var ret = extension.renderer[prop].apply(renderer, args);
 
-	    var _button = select(null);
-	    var _body = select(null);
-	    var _loaded;
-	    var _showing;
+	          if (ret === false) {
+	            ret = prevRenderer.apply(renderer, args);
+	          }
+
+	          return ret;
+	        };
+	      };
 
+	      for (var prop in extension.renderer) {
+	        _loop(prop);
+	      }
 
-	    function load() {
-	        if (!wikibase) { return; }
+	      opts.renderer = renderer;
+	    })();
+	  }
 
-	        _button
-	            .classed('tag-reference-loading', true);
+	  if (extension.tokenizer) {
+	    (function () {
+	      var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();
 
-	        wikibase.getDocs(what, gotDocs);
-	    }
+	      var _loop2 = function _loop2(prop) {
+	        var prevTokenizer = tokenizer[prop];
 
+	        tokenizer[prop] = function () {
+	          for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+	            args[_key2] = arguments[_key2];
+	          }
 
-	    function gotDocs(err, docs) {
-	        _body.html('');
+	          var ret = extension.tokenizer[prop].apply(tokenizer, args);
 
-	        if (!docs || !docs.title) {
-	            _body
-	                .append('p')
-	                .attr('class', 'tag-reference-description')
-	                .text(_t('inspector.no_documentation_key'));
-	            done();
-	            return;
-	        }
+	          if (ret === false) {
+	            ret = prevTokenizer.apply(tokenizer, args);
+	          }
 
-	        if (docs.imageURL) {
-	            _body
-	                .append('img')
-	                .attr('class', 'tag-reference-wiki-image')
-	                .attr('src', docs.imageURL)
-	                .on('load', function() { done(); })
-	                .on('error', function() { select(this).remove(); done(); });
-	        } else {
-	            done();
-	        }
-
-	        _body
-	            .append('p')
-	            .attr('class', 'tag-reference-description')
-	            .text(docs.description || _t('inspector.no_documentation_key'))
-	            .append('a')
-	            .attr('class', 'tag-reference-edit')
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .attr('title', _t('inspector.edit_reference'))
-	            .attr('href', docs.editURL)
-	            .call(svgIcon('#iD-icon-edit', 'inline'));
-
-	        if (docs.wiki) {
-	            _body
-	              .append('a')
-	              .attr('class', 'tag-reference-link')
-	              .attr('target', '_blank')
-	              .attr('tabindex', -1)
-	              .attr('href', docs.wiki.url)
-	              .call(svgIcon('#iD-icon-out-link', 'inline'))
-	              .append('span')
-	              .text(_t(docs.wiki.text));
-	        }
-
-	        // Add link to info about "good changeset comments" - #2923
-	        if (what.key === 'comment') {
-	            _body
-	                .append('a')
-	                .attr('class', 'tag-reference-comment-link')
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .call(svgIcon('#iD-icon-out-link', 'inline'))
-	                .attr('href', _t('commit.about_changeset_comments_link'))
-	                .append('span')
-	                .text(_t('commit.about_changeset_comments'));
-	        }
-	    }
+	          return ret;
+	        };
+	      };
 
+	      for (var prop in extension.tokenizer) {
+	        _loop2(prop);
+	      }
 
-	    function done() {
-	        _loaded = true;
+	      opts.tokenizer = tokenizer;
+	    })();
+	  }
 
-	        _button
-	            .classed('tag-reference-loading', false);
+	  if (extension.walkTokens) {
+	    var walkTokens = marked.defaults.walkTokens;
 
-	        _body
-	            .classed('expanded', true)
-	            .transition()
-	            .duration(200)
-	            .style('max-height', '200px')
-	            .style('opacity', '1');
+	    opts.walkTokens = function (token) {
+	      extension.walkTokens(token);
 
-	        _showing = true;
+	      if (walkTokens) {
+	        walkTokens(token);
+	      }
+	    };
+	  }
 
-	        _button.selectAll('svg.icon use').each(function() {
-	            var iconUse = select(this);
-	            if (iconUse.attr('href') === '#iD-icon-info') {
-	                iconUse.attr('href', '#iD-icon-info-filled');
-	            }
-	        });
-	    }
+	  marked.setOptions(opts);
+	};
+	/**
+	 * Run callback for every token
+	 */
 
 
-	    function hide() {
-	        _body
-	            .transition()
-	            .duration(200)
-	            .style('max-height', '0px')
-	            .style('opacity', '0')
-	            .on('end', function () {
-	                _body.classed('expanded', false);
-	            });
+	marked.walkTokens = function (tokens, callback) {
+	  var _iterator = _createForOfIteratorHelper(tokens),
+	      _step;
 
-	        _showing = false;
+	  try {
+	    for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	      var token = _step.value;
+	      callback(token);
 
-	        _button.selectAll('svg.icon use').each(function() {
-	            var iconUse = select(this);
-	            if (iconUse.attr('href') === '#iD-icon-info-filled') {
-	                iconUse.attr('href', '#iD-icon-info');
-	            }
-	        });
+	      switch (token.type) {
+	        case 'table':
+	          {
+	            var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
+	                _step2;
 
-	    }
+	            try {
+	              for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+	                var cell = _step2.value;
+	                marked.walkTokens(cell, callback);
+	              }
+	            } catch (err) {
+	              _iterator2.e(err);
+	            } finally {
+	              _iterator2.f();
+	            }
 
+	            var _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
+	                _step3;
 
-	    tagReference.button = function(selection, klass, iconName) {
-	        _button = selection.selectAll('.tag-reference-button')
-	            .data([0]);
+	            try {
+	              for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
+	                var row = _step3.value;
 
-	        _button = _button.enter()
-	            .append('button')
-	            .attr('class', 'tag-reference-button ' + klass)
-	            .attr('title', _t('icons.information'))
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-' + (iconName || 'inspect')))
-	            .merge(_button);
+	                var _iterator4 = _createForOfIteratorHelper(row),
+	                    _step4;
 
-	        _button
-	            .on('click', function () {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                this.blur();    // avoid keeping focus on the button - #4641
-	                if (_showing) {
-	                    hide();
-	                } else if (_loaded) {
-	                    done();
-	                } else {
-	                    load();
+	                try {
+	                  for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
+	                    var _cell = _step4.value;
+	                    marked.walkTokens(_cell, callback);
+	                  }
+	                } catch (err) {
+	                  _iterator4.e(err);
+	                } finally {
+	                  _iterator4.f();
 	                }
-	            });
-	    };
-
+	              }
+	            } catch (err) {
+	              _iterator3.e(err);
+	            } finally {
+	              _iterator3.f();
+	            }
 
-	    tagReference.body = function(selection) {
-	        var itemID = what.qid || what.rtype || (what.key + '-' + what.value);
-	        _body = selection.selectAll('.tag-reference-body')
-	            .data([itemID], function(d) { return d; });
+	            break;
+	          }
 
-	        _body.exit()
-	            .remove();
+	        case 'list':
+	          {
+	            marked.walkTokens(token.items, callback);
+	            break;
+	          }
 
-	        _body = _body.enter()
-	            .append('div')
-	            .attr('class', 'tag-reference-body')
-	            .style('max-height', '0')
-	            .style('opacity', '0')
-	            .merge(_body);
+	        default:
+	          {
+	            if (token.tokens) {
+	              marked.walkTokens(token.tokens, callback);
+	            }
+	          }
+	      }
+	    }
+	  } catch (err) {
+	    _iterator.e(err);
+	  } finally {
+	    _iterator.f();
+	  }
+	};
+	/**
+	 * Parse Inline
+	 */
 
-	        if (_showing === false) {
-	            hide();
-	        }
-	    };
 
+	marked.parseInline = function (src, opt) {
+	  // throw error in case of non string input
+	  if (typeof src === 'undefined' || src === null) {
+	    throw new Error('marked.parseInline(): input parameter is undefined or null');
+	  }
 
-	    tagReference.showing = function(val) {
-	        if (!arguments.length) { return _showing; }
-	        _showing = val;
-	        return tagReference;
-	    };
+	  if (typeof src !== 'string') {
+	    throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+	  }
 
+	  opt = merge$3({}, marked.defaults, opt || {});
+	  checkSanitizeDeprecation$1(opt);
 
-	    return tagReference;
-	}
+	  try {
+	    var tokens = Lexer_1.lexInline(src, opt);
 
-	function uiSectionRawTagEditor(id, context) {
+	    if (opt.walkTokens) {
+	      marked.walkTokens(tokens, opt.walkTokens);
+	    }
 
-	    var section = uiSection(id, context)
-	        .classes('raw-tag-editor')
-	        .title(function() {
-	            var count = Object.keys(_tags).filter(function(d) { return d; }).length;
-	            return _t('inspector.title_count', { title: _t('inspector.tags'), count: count });
-	        })
-	        .expandedByDefault(false)
-	        .disclosureContent(renderDisclosureContent);
-
-	    var taginfo = services.taginfo;
-	    var dispatch$1 = dispatch('change');
-	    var availableViews = [
-	        { id: 'text', icon: '#fas-i-cursor' },
-	        { id: 'list', icon: '#fas-th-list' }
-	    ];
-
-	    var _tagView = (corePreferences('raw-tag-editor-view') || 'list');   // 'list, 'text'
-	    var _readOnlyTags = [];
-	    // the keys in the order we want them to display
-	    var _orderedKeys = [];
-	    var _showBlank = false;
-	    var _pendingChange = null;
-	    var _state;
-	    var _presets;
-	    var _tags;
-	    var _entityIDs;
-
-	    function renderDisclosureContent(wrap) {
-
-	        // remove deleted keys
-	        _orderedKeys = _orderedKeys.filter(function(key) {
-	            return _tags[key] !== undefined;
-	        });
+	    return Parser_1.parseInline(tokens, opt);
+	  } catch (e) {
+	    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-	        // When switching to a different entity or changing the state (hover/select)
-	        // reorder the keys alphabetically.
-	        // We trigger this by emptying the `_orderedKeys` array, then it will be rebuilt here.
-	        // Otherwise leave their order alone - #5857, #5927
-	        var all = Object.keys(_tags).sort();
-	        var missingKeys = utilArrayDifference(all, _orderedKeys);
-	        for (var i in missingKeys) {
-	            _orderedKeys.push(missingKeys[i]);
-	        }
+	    if (opt.silent) {
+	      return '<p>An error occurred:</p><pre>' + escape$3(e.message + '', true) + '</pre>';
+	    }
 
-	        // assemble row data
-	        var rowData = _orderedKeys.map(function(key, i) {
-	            return { index: i, key: key, value: _tags[key] };
-	        });
+	    throw e;
+	  }
+	};
+	/**
+	 * Expose
+	 */
 
-	        // append blank row last, if necessary
-	        if (!rowData.length || _showBlank) {
-	            _showBlank = false;
-	            rowData.push({ index: rowData.length, key: '', value: '' });
-	        }
 
+	marked.Parser = Parser_1;
+	marked.parser = Parser_1.parse;
+	marked.Renderer = Renderer_1;
+	marked.TextRenderer = TextRenderer_1;
+	marked.Lexer = Lexer_1;
+	marked.lexer = Lexer_1.lex;
+	marked.Tokenizer = Tokenizer_1;
+	marked.Slugger = Slugger_1;
+	marked.parse = marked;
+	var marked_1 = marked;
 
-	        // View Options
-	        var options = wrap.selectAll('.raw-tag-options')
-	            .data([0]);
+	var tiler$2 = utilTiler();
+	var dispatch$3 = dispatch('loaded');
+	var _tileZoom$2 = 14;
+	var _osmoseUrlRoot = 'https://osmose.openstreetmap.fr/api/0.3';
+	var _osmoseData = {
+	  icons: {},
+	  items: []
+	}; // This gets reassigned if reset
 
-	        options.exit()
-	            .remove();
+	var _cache$2;
 
-	        var optionsEnter = options.enter()
-	            .insert('div', ':first-child')
-	            .attr('class', 'raw-tag-options');
+	function abortRequest$2(controller) {
+	  if (controller) {
+	    controller.abort();
+	  }
+	}
 
-	        var optionEnter = optionsEnter.selectAll('.raw-tag-option')
-	            .data(availableViews, function(d) { return d.id; })
-	            .enter();
+	function abortUnwantedRequests$2(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
-	        optionEnter
-	            .append('button')
-	            .attr('class', function(d) {
-	                return 'raw-tag-option raw-tag-option-' + d.id + (_tagView === d.id ? ' selected' : '');
-	            })
-	            .attr('title', function(d) { return _t('icons.' + d.id); })
-	            .on('click', function(d) {
-	                _tagView = d.id;
-	                corePreferences('raw-tag-editor-view', d.id);
+	    if (!wanted) {
+	      abortRequest$2(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
+	    }
+	  });
+	}
 
-	                wrap.selectAll('.raw-tag-option')
-	                    .classed('selected', function(datum) { return datum === d; });
+	function encodeIssueRtree$2(d) {
+	  return {
+	    minX: d.loc[0],
+	    minY: d.loc[1],
+	    maxX: d.loc[0],
+	    maxY: d.loc[1],
+	    data: d
+	  };
+	} // Replace or remove QAItem from rtree
 
-	                wrap.selectAll('.tag-text')
-	                    .classed('hide', (d.id !== 'text'))
-	                    .each(setTextareaHeight);
 
-	                wrap.selectAll('.tag-list, .add-row')
-	                    .classed('hide', (d.id !== 'list'));
-	            })
-	            .each(function(d) {
-	                select(this)
-	                    .call(svgIcon(d.icon));
-	            });
+	function updateRtree$2(item, replace) {
+	  _cache$2.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
+	  if (replace) {
+	    _cache$2.rtree.insert(item);
+	  }
+	} // Issues shouldn't obscure each other
 
-	        // View as Text
-	        var textData = rowsToText(rowData);
-	        var textarea = wrap.selectAll('.tag-text')
-	            .data([0]);
 
-	        textarea = textarea.enter()
-	            .append('textarea')
-	            .attr('class', 'tag-text' + (_tagView !== 'text' ? ' hide' : ''))
-	            .call(utilNoAuto)
-	            .attr('placeholder', _t('inspector.key_value'))
-	            .attr('spellcheck', 'false')
-	            .merge(textarea);
+	function preventCoincident$1(loc) {
+	  var coincident = false;
 
-	        textarea
-	            .call(utilGetSetValue, textData)
-	            .each(setTextareaHeight)
-	            .on('input', setTextareaHeight)
-	            .on('blur', textChanged)
-	            .on('change', textChanged);
+	  do {
+	    // first time, move marker up. after that, move marker right.
+	    var delta = coincident ? [0.00001, 0] : [0, 0.00001];
+	    loc = geoVecAdd(loc, delta);
+	    var bbox = geoExtent(loc).bbox();
+	    coincident = _cache$2.rtree.search(bbox).length;
+	  } while (coincident);
 
+	  return loc;
+	}
 
-	        // View as List
-	        var list = wrap.selectAll('.tag-list')
-	            .data([0]);
+	var serviceOsmose = {
+	  title: 'osmose',
+	  init: function init() {
+	    _mainFileFetcher.get('qa_data').then(function (d) {
+	      _osmoseData = d.osmose;
+	      _osmoseData.items = Object.keys(d.osmose.icons).map(function (s) {
+	        return s.split('-')[0];
+	      }).reduce(function (unique, item) {
+	        return unique.indexOf(item) !== -1 ? unique : [].concat(_toConsumableArray(unique), [item]);
+	      }, []);
+	    });
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'tag-list' + (_tagView !== 'list' ? ' hide' : ''))
-	            .merge(list);
+	    if (!_cache$2) {
+	      this.reset();
+	    }
 
+	    this.event = utilRebind(this, dispatch$3, 'on');
+	  },
+	  reset: function reset() {
+	    var _strings = {};
+	    var _colors = {};
 
-	        // Container for the Add button
-	        var addRowEnter = wrap.selectAll('.add-row')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'add-row' + (_tagView !== 'list' ? ' hide' : ''));
+	    if (_cache$2) {
+	      Object.values(_cache$2.inflightTile).forEach(abortRequest$2); // Strings and colors are static and should not be re-populated
 
-	        addRowEnter
-	            .append('button')
-	            .attr('class', 'add-tag')
-	            .call(svgIcon('#iD-icon-plus', 'light'))
-	            .on('click', addTag);
+	      _strings = _cache$2.strings;
+	      _colors = _cache$2.colors;
+	    }
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-value');   // preserve space
+	    _cache$2 = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush(),
+	      strings: _strings,
+	      colors: _colors
+	    };
+	  },
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-buttons');  // preserve space
+	    var params = {
+	      // Tiles return a maximum # of issues
+	      // So we want to filter our request for only types iD supports
+	      item: _osmoseData.items
+	    }; // determine the needed tiles to cover the view
 
+	    var tiles = tiler$2.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	        // Tag list items
-	        var items = list.selectAll('.tag-row')
-	            .data(rowData, function(d) { return d.key; });
+	    abortUnwantedRequests$2(_cache$2, tiles); // issue new requests..
 
-	        items.exit()
-	            .each(unbind)
-	            .remove();
+	    tiles.forEach(function (tile) {
+	      if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
 
+	      var _tile$xyz = _slicedToArray(tile.xyz, 3),
+	          x = _tile$xyz[0],
+	          y = _tile$xyz[1],
+	          z = _tile$xyz[2];
 
-	        // Enter
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'tag-row')
-	            .classed('readonly', isReadOnly);
+	      var url = "".concat(_osmoseUrlRoot, "/issues/").concat(z, "/").concat(x, "/").concat(y, ".json?") + utilQsString(params);
+	      var controller = new AbortController();
+	      _cache$2.inflightTile[tile.id] = controller;
+	      d3_json(url, {
+	        signal: controller.signal
+	      }).then(function (data) {
+	        delete _cache$2.inflightTile[tile.id];
+	        _cache$2.loadedTile[tile.id] = true;
+
+	        if (data.features) {
+	          data.features.forEach(function (issue) {
+	            var _issue$properties = issue.properties,
+	                item = _issue$properties.item,
+	                cl = _issue$properties["class"],
+	                id = _issue$properties.uuid;
+	            /* Osmose issues are uniquely identified by a unique
+	              `item` and `class` combination (both integer values) */
+
+	            var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)
+
+	            if (itemType in _osmoseData.icons) {
+	              var loc = issue.geometry.coordinates; // lon, lat
+
+	              loc = preventCoincident$1(loc);
+	              var d = new QAItem(loc, _this, itemType, id, {
+	                item: item
+	              }); // Setting elems here prevents UI detail requests
+
+	              if (item === 8300 || item === 8360) {
+	                d.elems = [];
+	              }
 
-	        var innerWrap = itemsEnter.append('div')
-	            .attr('class', 'inner-wrap');
+	              _cache$2.data[d.id] = d;
 
-	        innerWrap
-	            .append('div')
-	            .attr('class', 'key-wrap')
-	            .append('input')
-	            .property('type', 'text')
-	            .attr('class', 'key')
-	            .call(utilNoAuto)
-	            .on('blur', keyChange)
-	            .on('change', keyChange);
-
-	        innerWrap
-	            .append('div')
-	            .attr('class', 'value-wrap')
-	            .append('input')
-	            .property('type', 'text')
-	            .attr('class', 'value')
-	            .call(utilNoAuto)
-	            .on('blur', valueChange)
-	            .on('change', valueChange)
-	            .on('keydown.push-more', pushMore);
-
-	        innerWrap
-	            .append('button')
-	            .attr('tabindex', -1)
-	            .attr('class', 'form-field-button remove')
-	            .attr('title', _t('icons.remove'))
-	            .call(svgIcon('#iD-operation-delete'));
-
-
-	        // Update
-	        items = items
-	            .merge(itemsEnter)
-	            .sort(function(a, b) { return a.index - b.index; });
-
-	        items
-	            .each(function(d) {
-	                var row = select(this);
-	                var key = row.select('input.key');      // propagate bound data
-	                var value = row.select('input.value');  // propagate bound data
-
-	                if (_entityIDs && taginfo && _state !== 'hover') {
-	                    bindTypeahead(key, value);
-	                }
+	              _cache$2.rtree.insert(encodeIssueRtree$2(d));
+	            }
+	          });
+	        }
 
-	                var reference;
+	        dispatch$3.call('loaded');
+	      })["catch"](function () {
+	        delete _cache$2.inflightTile[tile.id];
+	        _cache$2.loadedTile[tile.id] = true;
+	      });
+	    });
+	  },
+	  loadIssueDetail: function loadIssueDetail(issue) {
+	    var _this2 = this;
 
-	                if (typeof d.value !== 'string') {
-	                    reference = uiTagReference({ key: d.key });
-	                } else {
-	                    var isRelation = _entityIDs && _entityIDs.some(function(entityID) {
-	                        return context.entity(entityID).type === 'relation';
-	                    });
-	                    if (isRelation && d.key === 'type') {
-	                        reference = uiTagReference({ rtype: d.value });
-	                    } else {
-	                        reference = uiTagReference({ key: d.key, value: d.value });
-	                    }
-	                }
+	    // Issue details only need to be fetched once
+	    if (issue.elems !== undefined) {
+	      return Promise.resolve(issue);
+	    }
 
-	                if (_state === 'hover') {
-	                    reference.showing(false);
-	                }
+	    var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "?langs=").concat(_mainLocalizer.localeCode());
 
-	                row.select('.inner-wrap')      // propagate bound data
-	                    .call(reference.button);
+	    var cacheDetails = function cacheDetails(data) {
+	      // Associated elements used for highlighting
+	      // Assign directly for immediate use in the callback
+	      issue.elems = data.elems.map(function (e) {
+	        return e.type.substring(0, 1) + e.id;
+	      }); // Some issues have instance specific detail in a subtitle
 
-	                row.call(reference.body);
+	      issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
 
-	                row.select('button.remove');   // propagate bound data
-	            });
+	      _this2.replaceItem(issue);
+	    };
 
-	        items.selectAll('input.key')
-	            .attr('title', function(d) { return d.key; })
-	            .call(utilGetSetValue, function(d) { return d.key; })
-	            .attr('readonly', function(d) {
-	                return (isReadOnly(d) || (typeof d.value !== 'string')) || null;
-	            });
+	    return d3_json(url).then(cacheDetails).then(function () {
+	      return issue;
+	    });
+	  },
+	  loadStrings: function loadStrings() {
+	    var locale = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : _mainLocalizer.localeCode();
+	    var items = Object.keys(_osmoseData.icons);
 
-	        items.selectAll('input.value')
-	            .attr('title', function(d) {
-	                return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : d.value;
-	            })
-	            .classed('mixed', function(d) {
-	                return Array.isArray(d.value);
-	            })
-	            .attr('placeholder', function(d) {
-	                return typeof d.value === 'string' ? null : _t('inspector.multiple_values');
-	            })
-	            .call(utilGetSetValue, function(d) {
-	                return typeof d.value === 'string' ? d.value : '';
-	            })
-	            .attr('readonly', function(d) {
-	                return isReadOnly(d) || null;
-	            });
+	    if (locale in _cache$2.strings && Object.keys(_cache$2.strings[locale]).length === items.length) {
+	      return Promise.resolve(_cache$2.strings[locale]);
+	    } // May be partially populated already if some requests were successful
 
-	        items.selectAll('button.remove')
-	            .on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'down', removeTag);  // 'click' fires too late - #5878
 
-	    }
+	    if (!(locale in _cache$2.strings)) {
+	      _cache$2.strings[locale] = {};
+	    } // Only need to cache strings for supported issue types
+	    // Using multiple individual item + class requests to reduce fetched data size
 
-	    function isReadOnly(d) {
-	        for (var i = 0; i < _readOnlyTags.length; i++) {
-	            if (d.key.match(_readOnlyTags[i]) !== null) {
-	                return true;
-	            }
-	        }
-	        return false;
-	    }
 
-	    function setTextareaHeight() {
-	        if (_tagView !== 'text') { return; }
+	    var allRequests = items.map(function (itemType) {
+	      // No need to request data we already have
+	      if (itemType in _cache$2.strings[locale]) return null;
 
-	        var selection = select(this);
-	        selection.style('height', null);
-	        selection.style('height', selection.node().scrollHeight + 5 + 'px');
-	    }
+	      var cacheData = function cacheData(data) {
+	        // Bunch of nested single value arrays of objects
+	        var _data$categories = _slicedToArray(data.categories, 1),
+	            _data$categories$ = _data$categories[0],
+	            cat = _data$categories$ === void 0 ? {
+	          items: []
+	        } : _data$categories$;
 
-	    function stringify(s) {
-	        return JSON.stringify(s).slice(1, -1);   // without leading/trailing "
-	    }
+	        var _cat$items = _slicedToArray(cat.items, 1),
+	            _cat$items$ = _cat$items[0],
+	            item = _cat$items$ === void 0 ? {
+	          "class": []
+	        } : _cat$items$;
 
-	    function unstringify(s) {
-	        var leading = '';
-	        var trailing = '';
-	        if (s.length < 1 || s.charAt(0) !== '"') {
-	            leading = '"';
-	        }
-	        if (s.length < 2 || s.charAt(s.length - 1) !== '"' ||
-	            (s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\')
-	        ) {
-	            trailing = '"';
-	        }
-	        return JSON.parse(leading + s + trailing);
-	    }
+	        var _item$class = _slicedToArray(item["class"], 1),
+	            _item$class$ = _item$class[0],
+	            cl = _item$class$ === void 0 ? null : _item$class$; // If null default value is reached, data wasn't as expected (or was empty)
 
-	    function rowsToText(rows) {
-	        var str = rows
-	            .filter(function(row) { return row.key && row.key.trim() !== ''; })
-	            .map(function(row) {
-	                var rawVal = row.value;
-	                if (typeof rawVal !== 'string') { rawVal = '*'; }
-	                var val = rawVal ? stringify(rawVal) : '';
-	                return stringify(row.key) + '=' + val;
-	            })
-	            .join('\n');
 
-	        if (_state !== 'hover' && str.length) {
-	            return str + '\n';
-	        }
-	        return  str;
-	    }
+	        if (!cl) {
+	          /* eslint-disable no-console */
+	          console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
+	          /* eslint-enable no-console */
 
-	    function textChanged() {
-	        var newText = this.value.trim();
-	        var newTags = {};
-	        newText.split('\n').forEach(function(row) {
-	            var m = row.match(/^\s*([^=]+)=(.*)$/);
-	            if (m !== null) {
-	                var k = context.cleanTagKey(unstringify(m[1].trim()));
-	                var v = context.cleanTagValue(unstringify(m[2].trim()));
-	                newTags[k] = v;
-	            }
-	        });
+	          return;
+	        } // Cache served item colors to automatically style issue markers later
 
-	        var tagDiff = utilTagDiff(_tags, newTags);
-	        if (!tagDiff.length) { return; }
 
-	        _pendingChange  = _pendingChange || {};
+	        var itemInt = item.item,
+	            color = item.color;
 
-	        tagDiff.forEach(function(change) {
-	            if (isReadOnly({ key: change.key })) { return; }
+	        if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
+	          _cache$2.colors[itemInt] = color;
+	        } // Value of root key will be null if no string exists
+	        // If string exists, value is an object with key 'auto' for string
 
-	            // skip unchanged multiselection placeholders
-	            if (change.newVal === '*' && typeof change.oldVal !== 'string') { return; }
 
-	            if (change.type === '-') {
-	                _pendingChange[change.key] = undefined;
-	            } else if (change.type === '+') {
-	                _pendingChange[change.key] = change.newVal || '';
-	            }
-	        });
+	        var title = cl.title,
+	            detail = cl.detail,
+	            fix = cl.fix,
+	            trap = cl.trap; // Osmose titles shouldn't contain markdown
 
-	        if (Object.keys(_pendingChange).length === 0) {
-	            _pendingChange = null;
-	            return;
-	        }
+	        var issueStrings = {};
+	        if (title) issueStrings.title = title.auto;
+	        if (detail) issueStrings.detail = marked_1(detail.auto);
+	        if (trap) issueStrings.trap = marked_1(trap.auto);
+	        if (fix) issueStrings.fix = marked_1(fix.auto);
+	        _cache$2.strings[locale][itemType] = issueStrings;
+	      };
 
-	        scheduleChange();
-	    }
+	      var _itemType$split = itemType.split('-'),
+	          _itemType$split2 = _slicedToArray(_itemType$split, 2),
+	          item = _itemType$split2[0],
+	          cl = _itemType$split2[1]; // Osmose API falls back to English strings where untranslated or if locale doesn't exist
 
-	    function pushMore() {
-	        // if pressing Tab on the last value field with content, add a blank row
-	        if (event.keyCode === 9 && !event.shiftKey &&
-	            section.selection().selectAll('.tag-list li:last-child input.value').node() === this &&
-	            utilGetSetValue(select(this))) {
-	            addTag();
-	        }
-	    }
 
-	    function bindTypeahead(key, value) {
-	        if (isReadOnly(key.datum())) { return; }
+	      var url = "".concat(_osmoseUrlRoot, "/items/").concat(item, "/class/").concat(cl, "?langs=").concat(locale);
+	      return d3_json(url).then(cacheData);
+	    }).filter(Boolean);
+	    return Promise.all(allRequests).then(function () {
+	      return _cache$2.strings[locale];
+	    });
+	  },
+	  getStrings: function getStrings(itemType) {
+	    var locale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : _mainLocalizer.localeCode();
+	    // No need to fallback to English, Osmose API handles this for us
+	    return locale in _cache$2.strings ? _cache$2.strings[locale][itemType] : {};
+	  },
+	  getColor: function getColor(itemType) {
+	    return itemType in _cache$2.colors ? _cache$2.colors[itemType] : '#FFFFFF';
+	  },
+	  postUpdate: function postUpdate(issue, callback) {
+	    var _this3 = this;
 
-	        if (Array.isArray(value.datum().value)) {
-	            value.call(uiCombobox(context, 'tag-value')
-	                .minItems(1)
-	                .fetcher(function(value, callback) {
-	                    var keyString = utilGetSetValue(key);
-	                    if (!_tags[keyString]) { return; }
-	                    var data = _tags[keyString].filter(Boolean).map(function(tagValue) {
-	                        return {
-	                            value: tagValue,
-	                            title: tagValue
-	                        };
-	                    });
-	                    callback(data);
-	                }));
-	            return;
-	        }
+	    if (_cache$2.inflightPost[issue.id]) {
+	      return callback({
+	        message: 'Issue update already inflight',
+	        status: -2
+	      }, issue);
+	    } // UI sets the status to either 'done' or 'false'
 
-	        var geometry = context.graph().geometry(_entityIDs[0]);
 
-	        key.call(uiCombobox(context, 'tag-key')
-	            .fetcher(function(value, callback) {
-	                taginfo.keys({
-	                    debounce: true,
-	                    geometry: geometry,
-	                    query: value
-	                }, function(err, data) {
-	                    if (!err) {
-	                        var filtered = data.filter(function(d) { return _tags[d.value] === undefined; });
-	                        callback(sort(value, filtered));
-	                    }
-	                });
-	            }));
+	    var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
+	    var controller = new AbortController();
 
-	        value.call(uiCombobox(context, 'tag-value')
-	            .fetcher(function(value, callback) {
-	                taginfo.values({
-	                    debounce: true,
-	                    key: utilGetSetValue(key),
-	                    geometry: geometry,
-	                    query: value
-	                }, function(err, data) {
-	                    if (!err) { callback(sort(value, data)); }
-	                });
-	            }));
+	    var after = function after() {
+	      delete _cache$2.inflightPost[issue.id];
 
+	      _this3.removeItem(issue);
 
-	        function sort(value, data) {
-	            var sameletter = [];
-	            var other = [];
-	            for (var i = 0; i < data.length; i++) {
-	                if (data[i].value.substring(0, value.length) === value) {
-	                    sameletter.push(data[i]);
-	                } else {
-	                    other.push(data[i]);
-	                }
-	            }
-	            return sameletter.concat(other);
+	      if (issue.newStatus === 'done') {
+	        // Keep track of the number of issues closed per `item` to tag the changeset
+	        if (!(issue.item in _cache$2.closed)) {
+	          _cache$2.closed[issue.item] = 0;
 	        }
-	    }
 
-	    function unbind() {
-	        var row = select(this);
+	        _cache$2.closed[issue.item] += 1;
+	      }
+
+	      if (callback) callback(null, issue);
+	    };
 
-	        row.selectAll('input.key')
-	            .call(uiCombobox.off, context);
+	    _cache$2.inflightPost[issue.id] = controller;
+	    fetch(url, {
+	      signal: controller.signal
+	    }).then(after)["catch"](function (err) {
+	      delete _cache$2.inflightPost[issue.id];
+	      if (callback) callback(err.message);
+	    });
+	  },
+	  // Get all cached QAItems covering the viewport
+	  getItems: function getItems(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return _cache$2.rtree.search(bbox).map(function (d) {
+	      return d.data;
+	    });
+	  },
+	  // Get a QAItem from cache
+	  // NOTE: Don't change method name until UI v3 is merged
+	  getError: function getError(id) {
+	    return _cache$2.data[id];
+	  },
+	  // get the name of the icon to display for this item
+	  getIcon: function getIcon(itemType) {
+	    return _osmoseData.icons[itemType];
+	  },
+	  // Replace a single QAItem in the cache
+	  replaceItem: function replaceItem(item) {
+	    if (!(item instanceof QAItem) || !item.id) return;
+	    _cache$2.data[item.id] = item;
+	    updateRtree$2(encodeIssueRtree$2(item), true); // true = replace
 
-	        row.selectAll('input.value')
-	            .call(uiCombobox.off, context);
-	    }
+	    return item;
+	  },
+	  // Remove a single QAItem from the cache
+	  removeItem: function removeItem(item) {
+	    if (!(item instanceof QAItem) || !item.id) return;
+	    delete _cache$2.data[item.id];
+	    updateRtree$2(encodeIssueRtree$2(item), false); // false = remove
+	  },
+	  // Used to populate `closed:osmose:*` changeset tags
+	  getClosedCounts: function getClosedCounts() {
+	    return _cache$2.closed;
+	  },
+	  itemURL: function itemURL(item) {
+	    return "https://osmose.openstreetmap.fr/en/error/".concat(item.id);
+	  }
+	};
 
-	    function keyChange(d) {
-	        if (select(this).attr('readonly')) { return; }
+	var apibase = 'https://a.mapillary.com/v3/';
+	var viewercss = 'mapillary-js/mapillary.min.css';
+	var viewerjs = 'mapillary-js/mapillary.min.js';
+	var clientId = 'NzNRM2otQkR2SHJzaXJmNmdQWVQ0dzo1ZWYyMmYwNjdmNDdlNmVi';
+	var mapFeatureConfig = {
+	  values: ['construction--flat--crosswalk-plain', 'marking--discrete--crosswalk-zebra', 'object--banner', 'object--bench', 'object--bike-rack', 'object--billboard', 'object--catch-basin', 'object--cctv-camera', 'object--fire-hydrant', 'object--mailbox', 'object--manhole', 'object--phone-booth', 'object--sign--advertisement', 'object--sign--information', 'object--sign--store', 'object--street-light', 'object--support--utility-pole', 'object--traffic-light--*', 'object--traffic-light--pedestrians', 'object--trash-can'].join(',')
+	};
+	var maxResults = 1000;
+	var tileZoom = 14;
+	var tiler$3 = utilTiler().zoomExtent([tileZoom, tileZoom]).skipNullIsland(true);
+	var dispatch$4 = dispatch('change', 'loadedImages', 'loadedSigns', 'loadedMapFeatures', 'bearingChanged', 'nodeChanged');
+	var _mlyFallback = false;
 
-	        var kOld = d.key;
+	var _mlyCache;
 
-	        // exit if we are currently about to delete this row anyway - #6366
-	        if (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) { return; }
+	var _mlyClicks;
 
-	        var kNew = context.cleanTagKey(this.value.trim());
+	var _mlyActiveImage;
 
-	        // allow no change if the key should be readonly
-	        if (isReadOnly({ key: kNew })) {
-	            this.value = kOld;
-	            return;
-	        }
+	var _mlySelectedImageKey;
 
-	        if (kNew &&
-	            kNew !== kOld &&
-	            _tags[kNew] !== undefined) {
-	            // new key is already in use, switch focus to the existing row
+	var _mlyViewer;
 
-	            this.value = kOld;                // reset the key
-	            section.selection().selectAll('.tag-list input.value')
-	                .each(function(d) {
-	                    if (d.key === kNew) {     // send focus to that other value combo instead
-	                        var input = select(this).node();
-	                        input.focus();
-	                        input.select();
-	                    }
-	                });
-	            return;
-	        }
+	var _mlyViewerFilter = ['all'];
 
+	var _loadViewerPromise;
 
-	        var row = this.parentNode.parentNode;
-	        var inputVal = select(row).selectAll('input.value');
-	        var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
+	var _mlyHighlightedDetection;
 
-	        _pendingChange = _pendingChange || {};
+	var _mlyShowFeatureDetections = false;
+	var _mlyShowSignDetections = false;
 
-	        if (kOld) {
-	            _pendingChange[kOld] = undefined;
-	        }
+	function abortRequest$3(controller) {
+	  controller.abort();
+	}
 
-	        _pendingChange[kNew] = vNew;
+	function loadTiles(which, url, projection) {
+	  var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
+	  var tiles = tiler$3.getTiles(projection); // abort inflight requests that are no longer needed
 
-	        // update the ordered key index so this row doesn't change position
-	        var existingKeyIndex = _orderedKeys.indexOf(kOld);
-	        if (existingKeyIndex !== -1) { _orderedKeys[existingKeyIndex] = kNew; }
+	  var cache = _mlyCache[which];
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k.indexOf(tile.id + ',') === 0;
+	    });
 
-	        d.key = kNew;    // update datum to avoid exit/enter on tag update
-	        d.value = vNew;
+	    if (!wanted) {
+	      abortRequest$3(cache.inflight[k]);
+	      delete cache.inflight[k];
+	    }
+	  });
+	  tiles.forEach(function (tile) {
+	    loadNextTilePage(which, currZoom, url, tile);
+	  });
+	}
 
-	        this.value = kNew;
-	        utilGetSetValue(inputVal, vNew);
-	        scheduleChange();
+	function loadNextTilePage(which, currZoom, url, tile) {
+	  var cache = _mlyCache[which];
+	  var rect = tile.extent.rectangle();
+	  var maxPages = maxPageAtZoom(currZoom);
+	  var nextPage = cache.nextPage[tile.id] || 0;
+	  var nextURL = cache.nextURL[tile.id] || url + utilQsString({
+	    per_page: maxResults,
+	    page: nextPage,
+	    client_id: clientId,
+	    bbox: [rect[0], rect[1], rect[2], rect[3]].join(',')
+	  });
+	  if (nextPage > maxPages) return;
+	  var id = tile.id + ',' + String(nextPage);
+	  if (cache.loaded[id] || cache.inflight[id]) return;
+	  var controller = new AbortController();
+	  cache.inflight[id] = controller;
+	  var options = {
+	    method: 'GET',
+	    signal: controller.signal,
+	    headers: {
+	      'Content-Type': 'application/json'
+	    }
+	  };
+	  fetch(nextURL, options).then(function (response) {
+	    if (!response.ok) {
+	      throw new Error(response.status + ' ' + response.statusText);
 	    }
 
-	    function valueChange(d) {
-	        if (isReadOnly(d)) { return; }
+	    var linkHeader = response.headers.get('Link');
 
-	        // exit if this is a multiselection and no value was entered
-	        if (typeof d.value !== 'string' && !this.value) { return; }
+	    if (linkHeader) {
+	      var pagination = parsePagination(linkHeader);
 
-	        // exit if we are currently about to delete this row anyway - #6366
-	        if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) { return; }
+	      if (pagination.next) {
+	        cache.nextURL[tile.id] = pagination.next;
+	      }
+	    }
 
-	        _pendingChange = _pendingChange || {};
+	    return response.json();
+	  }).then(function (data) {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
 
-	        _pendingChange[d.key] = context.cleanTagValue(this.value);
-	        scheduleChange();
+	    if (!data || !data.features || !data.features.length) {
+	      throw new Error('No Data');
 	    }
 
-	    function removeTag(d) {
-	        if (isReadOnly(d)) { return; }
+	    var features = data.features.map(function (feature) {
+	      var loc = feature.geometry.coordinates;
+	      var d; // An image (shown as a green dot on the map) is a single street photo with extra
+	      // information such as location, camera angle (CA), camera model, and so on.
+	      // Each image feature is a GeoJSON Point
 
-	        if (d.key === '') {    // removing the blank row
-	            _showBlank = false;
-	            section.reRender();
+	      if (which === 'images') {
+	        d = {
+	          loc: loc,
+	          key: feature.properties.key,
+	          ca: feature.properties.ca,
+	          captured_at: feature.properties.captured_at,
+	          captured_by: feature.properties.username,
+	          pano: feature.properties.pano
+	        };
+	        cache.forImageKey[d.key] = d; // cache imageKey -> image
+	        // Mapillary organizes images as sequences. A sequence of images are continuously captured
+	        // by a user at a give time. Sequences are shown on the map as green lines.
+	        // Each sequence feature is a GeoJSON LineString
+	      } else if (which === 'sequences') {
+	        var sequenceKey = feature.properties.key;
+	        cache.lineString[sequenceKey] = feature; // cache sequenceKey -> lineString
+
+	        feature.properties.coordinateProperties.image_keys.forEach(function (imageKey) {
+	          cache.forImageKey[imageKey] = sequenceKey; // cache imageKey -> sequenceKey
+	        });
+	        return false; // because no `d` data worth loading into an rbush
+	        // A map feature is a real world object that can be shown on a map. It could be any object
+	        // recognized from images, manually added in images, or added on the map.
+	        // Each map feature is a GeoJSON Point (located where the feature is)
+	      } else if (which === 'map_features' || which === 'points') {
+	        d = {
+	          loc: loc,
+	          key: feature.properties.key,
+	          value: feature.properties.value,
+	          "package": feature.properties["package"],
+	          detections: feature.properties.detections
+	        };
+	      }
 
-	        } else {
-	            // remove the key from the ordered key index
-	            _orderedKeys = _orderedKeys.filter(function(key) { return key !== d.key; });
+	      return {
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      };
+	    }).filter(Boolean);
 
-	            _pendingChange  = _pendingChange || {};
-	            _pendingChange[d.key] = undefined;
-	            scheduleChange();
-	        }
+	    if (cache.rtree && features) {
+	      cache.rtree.load(features);
 	    }
 
-	    function addTag() {
-	        // Delay render in case this click is blurring an edited combo.
-	        // Without the setTimeout, the `content` render would wipe out the pending tag change.
-	        window.setTimeout(function() {
-	            _showBlank = true;
-	            section.reRender();
-	            section.selection().selectAll('.tag-list li:last-child input.key').node().focus();
-	        }, 20);
+	    if (data.features.length === maxResults) {
+	      // more pages to load
+	      cache.nextPage[tile.id] = nextPage + 1;
+	      loadNextTilePage(which, currZoom, url, tile);
+	    } else {
+	      cache.nextPage[tile.id] = Infinity; // no more pages to load
 	    }
 
-	    function scheduleChange() {
-	        // Cache IDs in case the editor is reloaded before the change event is called. - #6028
-	        var entityIDs = _entityIDs;
-
-	        // Delay change in case this change is blurring an edited combo. - #5878
-	        window.setTimeout(function() {
-	            if (!_pendingChange) { return; }
+	    if (which === 'images' || which === 'sequences') {
+	      dispatch$4.call('loadedImages');
+	    } else if (which === 'map_features') {
+	      dispatch$4.call('loadedSigns');
+	    } else if (which === 'points') {
+	      dispatch$4.call('loadedMapFeatures');
+	    }
+	  })["catch"](function () {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
+	  });
+	}
 
-	            dispatch$1.call('change', this, entityIDs, _pendingChange);
-	            _pendingChange = null;
-	        }, 10);
+	function loadData(which, url) {
+	  var cache = _mlyCache[which];
+	  var options = {
+	    method: 'GET',
+	    headers: {
+	      'Content-Type': 'application/json'
+	    }
+	  };
+	  var nextUrl = url + '&client_id=' + clientId;
+	  return fetch(nextUrl, options).then(function (response) {
+	    if (!response.ok) {
+	      throw new Error(response.status + ' ' + response.statusText);
 	    }
 
+	    return response.json();
+	  }).then(function (data) {
+	    if (!data || !data.features || !data.features.length) {
+	      throw new Error('No Data');
+	    }
 
-	    section.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        if (_state !== val) {
-	            _orderedKeys = [];
-	            _state = val;
-	        }
-	        return section;
-	    };
+	    data.features.forEach(function (feature) {
+	      var d;
 
+	      if (which === 'image_detections') {
+	        d = {
+	          key: feature.properties.key,
+	          image_key: feature.properties.image_key,
+	          value: feature.properties.value,
+	          "package": feature.properties["package"],
+	          shape: feature.properties.shape
+	        };
 
-	    section.presets = function(val) {
-	        if (!arguments.length) { return _presets; }
-	        _presets = val;
-	        if (_presets && _presets.length && _presets[0].isFallback()) {
-	            section.disclosureExpanded(true);
-	        } else {
-	            section.disclosureExpanded(null);
+	        if (!cache.forImageKey[d.image_key]) {
+	          cache.forImageKey[d.image_key] = [];
 	        }
-	        return section;
-	    };
-
-
-	    section.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-	        return section;
-	    };
-
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-	            _entityIDs = val;
-	            _orderedKeys = [];
-	        }
-	        return section;
-	    };
+	        cache.forImageKey[d.image_key].push(d);
+	      }
+	    });
+	  });
+	}
 
+	function maxPageAtZoom(z) {
+	  if (z < 15) return 2;
+	  if (z === 15) return 5;
+	  if (z === 16) return 10;
+	  if (z === 17) return 20;
+	  if (z === 18) return 40;
+	  if (z > 18) return 80;
+	} // extract links to pages of API results
 
-	    // pass an array of regular expressions to test against the tag key
-	    section.readOnlyTags = function(val) {
-	        if (!arguments.length) { return _readOnlyTags; }
-	        _readOnlyTags = val;
-	        return section;
-	    };
 
+	function parsePagination(links) {
+	  return links.split(',').map(function (rel) {
+	    var elements = rel.split(';');
 
-	    return utilRebind(section, dispatch$1, 'on');
-	}
+	    if (elements.length === 2) {
+	      return [/<(.+)>/.exec(elements[0])[1], /rel="(.+)"/.exec(elements[1])[1]];
+	    } else {
+	      return ['', ''];
+	    }
+	  }).reduce(function (pagination, val) {
+	    pagination[val[1]] = val[0];
+	    return pagination;
+	  }, {});
+	} // partition viewport into higher zoom tiles
 
-	function uiDataEditor(context) {
-	    var dataHeader = uiDataHeader();
-	    var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context)
-	        .expandedByDefault(true)
-	        .readOnlyTags([/./]);
-	    var _datum;
 
+	function partitionViewport(projection) {
+	  var z = geoScaleToZoom(projection.scale());
+	  var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
 
-	    function dataEditor(selection) {
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // no more than `limit` results per partition.
 
-	        var header = selection.selectAll('.header')
-	            .data([0]);
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL');
+	function searchLimited(limit, projection, rtree) {
+	  limit = limit || 5;
+	  return partitionViewport(projection).reduce(function (result, extent) {
+	    var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+	      return d.data;
+	    });
+	    return found.length ? result.concat(found) : result;
+	  }, []);
+	}
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() {
-	                context.enter(modeBrowse(context));
-	            })
-	            .call(svgIcon('#iD-icon-close'));
+	var serviceMapillary = {
+	  init: function init() {
+	    if (!_mlyCache) {
+	      this.reset();
+	    }
 
-	        headerEnter
-	            .append('h3')
-	            .text(_t('map_data.title'));
+	    this.event = utilRebind(this, dispatch$4, 'on');
+	  },
+	  reset: function reset() {
+	    if (_mlyCache) {
+	      Object.values(_mlyCache.images.inflight).forEach(abortRequest$3);
+	      Object.values(_mlyCache.image_detections.inflight).forEach(abortRequest$3);
+	      Object.values(_mlyCache.map_features.inflight).forEach(abortRequest$3);
+	      Object.values(_mlyCache.points.inflight).forEach(abortRequest$3);
+	      Object.values(_mlyCache.sequences.inflight).forEach(abortRequest$3);
+	    }
+
+	    _mlyCache = {
+	      images: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        nextURL: {},
+	        rtree: new RBush(),
+	        forImageKey: {}
+	      },
+	      image_detections: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        nextURL: {},
+	        forImageKey: {}
+	      },
+	      map_features: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        nextURL: {},
+	        rtree: new RBush()
+	      },
+	      points: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        nextURL: {},
+	        rtree: new RBush()
+	      },
+	      sequences: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        nextURL: {},
+	        rtree: new RBush(),
+	        forImageKey: {},
+	        lineString: {}
+	      }
+	    };
+	    _mlySelectedImageKey = null;
+	    _mlyActiveImage = null;
+	    _mlyClicks = [];
+	  },
+	  images: function images(projection) {
+	    var limit = 5;
+	    return searchLimited(limit, projection, _mlyCache.images.rtree);
+	  },
+	  signs: function signs(projection) {
+	    var limit = 5;
+	    return searchLimited(limit, projection, _mlyCache.map_features.rtree);
+	  },
+	  mapFeatures: function mapFeatures(projection) {
+	    var limit = 5;
+	    return searchLimited(limit, projection, _mlyCache.points.rtree);
+	  },
+	  cachedImage: function cachedImage(imageKey) {
+	    return _mlyCache.images.forImageKey[imageKey];
+	  },
+	  sequences: function sequences(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    var sequenceKeys = {}; // all sequences for images in viewport
 
+	    _mlyCache.images.rtree.search(bbox).forEach(function (d) {
+	      var sequenceKey = _mlyCache.sequences.forImageKey[d.data.key];
 
-	        var body = selection.selectAll('.body')
-	            .data([0]);
+	      if (sequenceKey) {
+	        sequenceKeys[sequenceKey] = true;
+	      }
+	    }); // Return lineStrings for the sequences
 
-	        body = body.enter()
-	            .append('div')
-	            .attr('class', 'body')
-	            .merge(body);
 
-	        var editor = body.selectAll('.data-editor')
-	            .data([0]);
+	    return Object.keys(sequenceKeys).map(function (sequenceKey) {
+	      return _mlyCache.sequences.lineString[sequenceKey];
+	    });
+	  },
+	  signsSupported: function signsSupported() {
+	    return true;
+	  },
+	  loadImages: function loadImages(projection) {
+	    loadTiles('images', apibase + 'images?sort_by=key&', projection);
+	    loadTiles('sequences', apibase + 'sequences?sort_by=key&', projection);
+	  },
+	  loadSigns: function loadSigns(projection) {
+	    loadTiles('map_features', apibase + 'map_features?layers=trafficsigns&min_nbr_image_detections=2&sort_by=key&', projection);
+	  },
+	  loadMapFeatures: function loadMapFeatures(projection) {
+	    loadTiles('points', apibase + 'map_features?layers=points&min_nbr_image_detections=2&sort_by=key&values=' + mapFeatureConfig.values + '&', projection);
+	  },
+	  ensureViewerLoaded: function ensureViewerLoaded(context) {
+	    if (_loadViewerPromise) return _loadViewerPromise; // add mly-wrapper
 
-	        // enter/update
-	        editor.enter()
-	            .append('div')
-	            .attr('class', 'modal-section data-editor')
-	            .merge(editor)
-	            .call(dataHeader.datum(_datum));
+	    var wrap = context.container().select('.photoviewer').selectAll('.mly-wrapper').data([0]);
+	    wrap.enter().append('div').attr('id', 'ideditor-mly').attr('class', 'photo-wrapper mly-wrapper').classed('hide', true);
+	    var that = this;
+	    _loadViewerPromise = new Promise(function (resolve, reject) {
+	      var loadedCount = 0;
 
-	        var rte = body.selectAll('.raw-tag-editor')
-	            .data([0]);
+	      function loaded() {
+	        loadedCount += 1; // wait until both files are loaded
 
-	        // enter/update
-	        rte.enter()
-	            .append('div')
-	            .attr('class', 'raw-tag-editor data-editor')
-	            .merge(rte)
-	            .call(rawTagEditor
-	                .tags((_datum && _datum.properties) || {})
-	                .state('hover')
-	                .render
-	            )
-	            .selectAll('textarea.tag-text')
-	            .attr('readonly', true)
-	            .classed('readonly', true);
-	    }
-
-
-	    dataEditor.datum = function(val) {
-	        if (!arguments.length) { return _datum; }
-	        _datum = val;
-	        return this;
-	    };
+	        if (loadedCount === 2) resolve();
+	      }
 
+	      var head = select('head'); // load mapillary-viewercss
 
-	    return dataEditor;
-	}
+	      head.selectAll('#ideditor-mapillary-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-mapillary-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(viewercss)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
+	        reject();
+	      }); // load mapillary-viewerjs
 
-	function modeSelectData(context, selectedDatum) {
-	    var mode = {
-	        id: 'select-data',
-	        button: 'browse'
-	    };
+	      head.selectAll('#ideditor-mapillary-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-mapillary-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(viewerjs)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
+	        reject();
+	      });
+	    })["catch"](function () {
+	      _loadViewerPromise = null;
+	    }).then(function () {
+	      that.initViewer(context);
+	    });
+	    return _loadViewerPromise;
+	  },
+	  loadSignResources: function loadSignResources(context) {
+	    context.ui().svgDefs.addSprites(['mapillary-sprite'], false
+	    /* don't override colors */
+	    );
+	    return this;
+	  },
+	  loadObjectResources: function loadObjectResources(context) {
+	    context.ui().svgDefs.addSprites(['mapillary-object-sprite'], false
+	    /* don't override colors */
+	    );
+	    return this;
+	  },
+	  resetTags: function resetTags() {
+	    if (_mlyViewer && !_mlyFallback) {
+	      _mlyViewer.getComponent('tag').removeAll(); // remove previous detections
 
-	    var keybinding = utilKeybinding('select-data');
-	    var dataEditor = uiDataEditor(context);
-
-	    var behaviors = [
-	        behaviorBreathe(),
-	        behaviorHover(context),
-	        behaviorSelect(context),
-	        behaviorLasso(context),
-	        modeDragNode(context).behavior,
-	        modeDragNote(context).behavior
-	    ];
-
-
-	    // class the data as selected, or return to browse mode if the data is gone
-	    function selectData(drawn) {
-	        var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
-
-	        if (selection.empty()) {
-	            // Return to browse mode if selected DOM elements have
-	            // disappeared because the user moved them out of view..
-	            var source = event && event.type === 'zoom' && event.sourceEvent;
-	            if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-	                context.enter(modeBrowse(context));
-	            }
-	        } else {
-	            selection.classed('selected', true);
-	        }
 	    }
+	  },
+	  showFeatureDetections: function showFeatureDetections(value) {
+	    _mlyShowFeatureDetections = value;
 
-
-	    function esc() {
-	        if (context.container().select('.combobox').size()) { return; }
-	        context.enter(modeBrowse(context));
+	    if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+	      this.resetTags();
 	    }
+	  },
+	  showSignDetections: function showSignDetections(value) {
+	    _mlyShowSignDetections = value;
 
+	    if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+	      this.resetTags();
+	    }
+	  },
+	  filterViewer: function filterViewer(context) {
+	    var showsPano = context.photos().showsPanoramic();
+	    var showsFlat = context.photos().showsFlat();
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
+	    var filter = ['all'];
+	    if (!showsPano) filter.push(['==', 'pano', false]);
+	    if (!showsFlat && showsPano) filter.push(['==', 'pano', true]);
+	    if (usernames && usernames.length) filter.push(['==', 'username', usernames[0]]);
 
-	    mode.zoomToSelected = function() {
-	        var extent = geoExtent(d3_geoBounds(selectedDatum));
-	        context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
-	    };
-
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      filter.push(['>=', 'capturedAt', fromTimestamp]);
+	    }
 
-	    mode.enter = function() {
-	        behaviors.forEach(context.install);
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      filter.push(['>=', 'capturedAt', toTimestamp]);
+	    }
 
-	        keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on('⎋', esc, true);
+	    if (_mlyViewer) {
+	      _mlyViewer.setFilter(filter);
+	    }
 
-	        select(document)
-	            .call(keybinding);
+	    _mlyViewerFilter = filter;
+	    return filter;
+	  },
+	  showViewer: function showViewer(context) {
+	    var wrap = context.container().select('.photoviewer').classed('hide', false);
+	    var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();
 
-	        selectData();
+	    if (isHidden && _mlyViewer) {
+	      wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
+	      wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);
 
-	        var sidebar = context.ui().sidebar;
-	        sidebar.show(dataEditor.datum(selectedDatum));
+	      _mlyViewer.resize();
+	    }
 
-	        // expand the sidebar, avoid obscuring the data if needed
-	        var extent = geoExtent(d3_geoBounds(selectedDatum));
-	        sidebar.expand(sidebar.intersects(extent));
+	    return this;
+	  },
+	  hideViewer: function hideViewer(context) {
+	    _mlyActiveImage = null;
+	    _mlySelectedImageKey = null;
 
-	        context.map()
-	            .on('drawn.select-data', selectData);
-	    };
+	    if (!_mlyFallback && _mlyViewer) {
+	      _mlyViewer.getComponent('sequence').stop();
+	    }
 
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(null);
+	    viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+	    this.updateUrlImage(null);
+	    dispatch$4.call('nodeChanged');
+	    return this.setStyles(context, null, true);
+	  },
+	  parsePagination: parsePagination,
+	  updateUrlImage: function updateUrlImage(imageKey) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	    mode.exit = function() {
-	        behaviors.forEach(context.uninstall);
+	      if (imageKey) {
+	        hash.photo = 'mapillary/' + imageKey;
+	      } else {
+	        delete hash.photo;
+	      }
 
-	        select(document)
-	            .call(keybinding.unbind);
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
+	  },
+	  highlightDetection: function highlightDetection(detection) {
+	    if (detection) {
+	      _mlyHighlightedDetection = detection.detection_key;
+	    }
 
-	        context.surface()
-	            .selectAll('.layer-mapdata .selected')
-	            .classed('selected hover', false);
+	    return this;
+	  },
+	  initViewer: function initViewer(context) {
+	    var that = this;
+	    if (!window.Mapillary) return;
+	    var opts = {
+	      baseImageSize: 320,
+	      component: {
+	        cover: false,
+	        keyboard: false,
+	        tag: true
+	      }
+	    }; // Disable components requiring WebGL support
+
+	    if (!Mapillary.isSupported() && Mapillary.isFallbackSupported()) {
+	      _mlyFallback = true;
+	      opts.component = {
+	        cover: false,
+	        direction: false,
+	        imagePlane: false,
+	        keyboard: false,
+	        mouse: false,
+	        sequence: false,
+	        tag: false,
+	        image: true,
+	        // fallback
+	        navigation: true // fallback
 
-	        context.map()
-	            .on('drawn.select-data', null);
+	      };
+	    }
 
-	        context.ui().sidebar
-	            .hide();
-	    };
+	    _mlyViewer = new Mapillary.Viewer('ideditor-mly', clientId, null, opts);
 
+	    _mlyViewer.on('nodechanged', nodeChanged);
 
-	    return mode;
-	}
+	    _mlyViewer.on('bearingchanged', bearingChanged);
 
-	function uiImproveOsmComments() {
-	  var _qaItem;
+	    if (_mlyViewerFilter) {
+	      _mlyViewer.setFilter(_mlyViewerFilter);
+	    } // Register viewer resize handler
 
-	  function issueComments(selection) {
-	    // make the div immediately so it appears above the buttons
-	    var comments = selection.selectAll('.comments-container')
-	      .data([0]);
-
-	    comments = comments.enter()
-	      .append('div')
-	        .attr('class', 'comments-container')
-	      .merge(comments);
-
-	    // must retrieve comments from API before they can be displayed
-	    services.improveOSM.getComments(_qaItem)
-	      .then(function (d) {
-	        if (!d.comments) { return; } // nothing to do here
-
-	        var commentEnter = comments.selectAll('.comment')
-	          .data(d.comments)
-	          .enter()
-	          .append('div')
-	            .attr('class', 'comment');
-
-	        commentEnter
-	          .append('div')
-	            .attr('class', 'comment-avatar')
-	            .call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
-
-	        var mainEnter = commentEnter
-	          .append('div')
-	          .attr('class', 'comment-main');
-
-	        var metadataEnter = mainEnter
-	          .append('div')
-	            .attr('class', 'comment-metadata');
-
-	        metadataEnter
-	          .append('div')
-	            .attr('class', 'comment-author')
-	            .each(function(d) {
-	              var osm = services.osm;
-	              var selection = select(this);
-	              if (osm && d.username) {
-	                selection = selection
-	                  .append('a')
-	                  .attr('class', 'comment-author-link')
-	                  .attr('href', osm.userURL(d.username))
-	                  .attr('tabindex', -1)
-	                  .attr('target', '_blank');
-	              }
-	              selection
-	                .text(function (d) { return d.username; });
-	            });
 
-	        metadataEnter
-	          .append('div')
-	            .attr('class', 'comment-date')
-	            .text(function (d) { return _t('note.status.commented', { when: localeDateString(d.timestamp) }); });
+	    context.ui().photoviewer.on('resize.mapillary', function () {
+	      if (_mlyViewer) _mlyViewer.resize();
+	    }); // nodeChanged: called after the viewer has changed images and is ready.
+	    //
+	    // There is some logic here to batch up clicks into a _mlyClicks array
+	    // because the user might click on a lot of markers quickly and nodechanged
+	    // may be called out of order asynchronously.
+	    //
+	    // Clicks are added to the array in `selectedImage` and removed here.
+	    //
 
-	        mainEnter
-	          .append('div')
-	            .attr('class', 'comment-text')
-	          .append('p')
-	            .text(function (d) { return d.text; });
-	    })
-	    .catch(function (err) {
-	      console.log(err); // eslint-disable-line no-console
-	    });
-	  }
+	    function nodeChanged(node) {
+	      that.resetTags();
+	      var clicks = _mlyClicks;
+	      var index = clicks.indexOf(node.key);
+	      var selectedKey = _mlySelectedImageKey;
+	      that.setActiveImage(node);
 
-	  function localeDateString(s) {
-	    if (!s) { return null; }
-	    var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	    var d = new Date(s * 1000); // timestamp is served in seconds, date takes ms
-	    if (isNaN(d.getTime())) { return null; }
-	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-	  }
+	      if (index > -1) {
+	        // `nodechanged` initiated from clicking on a marker..
+	        clicks.splice(index, 1); // remove the click
+	        // If `node.key` matches the current _mlySelectedImageKey, call `selectImage()`
+	        // one more time to update the detections and attribution..
 
-	  issueComments.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return issueComments;
-	  };
+	        if (node.key === selectedKey) {
+	          that.selectImage(context, _mlySelectedImageKey, true);
+	        }
+	      } else {
+	        // `nodechanged` initiated from the Mapillary viewer controls..
+	        var loc = node.computedLatLon ? [node.computedLatLon.lon, node.computedLatLon.lat] : [node.latLon.lon, node.latLon.lat];
+	        context.map().centerEase(loc);
+	        that.selectImage(context, node.key, true);
+	      }
 
-	  return issueComments;
-	}
+	      dispatch$4.call('nodeChanged');
+	    }
 
-	function uiImproveOsmDetails(context) {
-	  var _qaItem;
+	    function bearingChanged(e) {
+	      dispatch$4.call('bearingChanged', undefined, e);
+	    }
+	  },
+	  // Pass in the image key string as `imageKey`.
+	  // This allows images to be selected from places that dont have access
+	  // to the full image datum (like the street signs layer or the js viewer)
+	  selectImage: function selectImage(context, imageKey, fromViewer) {
+	    _mlySelectedImageKey = imageKey;
+	    this.updateUrlImage(imageKey);
+	    var d = _mlyCache.images.forImageKey[imageKey];
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(d);
+	    imageKey = d && d.key || imageKey;
 
+	    if (!fromViewer && imageKey) {
+	      _mlyClicks.push(imageKey);
+	    }
 
-	  function issueDetail(d) {
-	    if (d.desc) { return d.desc; }
-	    var issueKey = d.issueKey;
-	    d.replacements = d.replacements || {};
-	    d.replacements.default = _t('inspector.unknown');  // special key `default` works as a fallback string
-	    return _t(("QA.improveOSM.error_types." + issueKey + ".description"), d.replacements);
-	  }
+	    this.setStyles(context, null, true);
 
+	    if (_mlyShowFeatureDetections) {
+	      this.updateDetections(imageKey, apibase + 'image_detections?layers=points&values=' + mapFeatureConfig.values + '&image_keys=' + imageKey);
+	    }
 
-	  function improveOsmDetails(selection) {
-	    var details = selection.selectAll('.error-details')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	    if (_mlyShowSignDetections) {
+	      this.updateDetections(imageKey, apibase + 'image_detections?layers=trafficsigns&image_keys=' + imageKey);
+	    }
 
-	    details.exit()
-	      .remove();
+	    if (_mlyViewer && imageKey) {
+	      _mlyViewer.moveToKey(imageKey)["catch"](function (e) {
+	        console.error('mly3', e);
+	      }); // eslint-disable-line no-console
 
-	    var detailsEnter = details.enter()
-	      .append('div')
-	        .attr('class', 'error-details qa-details-container');
+	    }
 
+	    return this;
+	  },
+	  getActiveImage: function getActiveImage() {
+	    return _mlyActiveImage;
+	  },
+	  getSelectedImageKey: function getSelectedImageKey() {
+	    return _mlySelectedImageKey;
+	  },
+	  getSequenceKeyForImageKey: function getSequenceKeyForImageKey(imageKey) {
+	    return _mlyCache.sequences.forImageKey[imageKey];
+	  },
+	  setActiveImage: function setActiveImage(node) {
+	    if (node) {
+	      _mlyActiveImage = {
+	        ca: node.originalCA,
+	        key: node.key,
+	        loc: [node.originalLatLon.lon, node.originalLatLon.lat],
+	        pano: node.pano
+	      };
+	    } else {
+	      _mlyActiveImage = null;
+	    }
+	  },
+	  // Updates the currently highlighted sequence and selected bubble.
+	  // Reset is only necessary when interacting with the viewport because
+	  // this implicitly changes the currently selected bubble/sequence
+	  setStyles: function setStyles(context, hovered, reset) {
+	    if (reset) {
+	      // reset all layers
+	      context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false);
+	      context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
+	    }
+
+	    var hoveredImageKey = hovered && hovered.key;
+	    var hoveredSequenceKey = hoveredImageKey && this.getSequenceKeyForImageKey(hoveredImageKey);
+	    var hoveredLineString = hoveredSequenceKey && _mlyCache.sequences.lineString[hoveredSequenceKey];
+	    var hoveredImageKeys = hoveredLineString && hoveredLineString.properties.coordinateProperties.image_keys || [];
+	    var selectedImageKey = _mlySelectedImageKey;
+	    var selectedSequenceKey = selectedImageKey && this.getSequenceKeyForImageKey(selectedImageKey);
+	    var selectedLineString = selectedSequenceKey && _mlyCache.sequences.lineString[selectedSequenceKey];
+	    var selectedImageKeys = selectedLineString && selectedLineString.properties.coordinateProperties.image_keys || []; // highlight sibling viewfields on either the selected or the hovered sequences
+
+	    var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
+	    context.container().selectAll('.layer-mapillary .viewfield-group').classed('highlighted', function (d) {
+	      return highlightedImageKeys.indexOf(d.key) !== -1;
+	    }).classed('hovered', function (d) {
+	      return d.key === hoveredImageKey;
+	    });
+	    context.container().selectAll('.layer-mapillary .sequence').classed('highlighted', function (d) {
+	      return d.properties.key === hoveredSequenceKey;
+	    }).classed('currentView', function (d) {
+	      return d.properties.key === selectedSequenceKey;
+	    }); // update viewfields if needed
 
-	    // description
-	    var descriptionEnter = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	    context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
 
-	    descriptionEnter
-	      .append('h4')
-	        .text(function () { return _t('QA.keepRight.detail_description'); });
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	    descriptionEnter
-	      .append('div')
-	        .attr('class', 'qa-details-description-text')
-	        .html(issueDetail);
+	      if (d.pano && d.key !== selectedImageKey) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
+	    }
 
-	    // If there are entity links in the error message..
-	    var relatedEntities = [];
-	    descriptionEnter.selectAll('.error_entity_link, .error_object_link')
-	      .each(function() {
-	        var link = select(this);
-	        var isObjectLink = link.classed('error_object_link');
-	        var entityID = isObjectLink ?
-	          (utilEntityRoot(_qaItem.objectType) + _qaItem.objectId)
-	          : this.textContent;
-	        var entity = context.hasEntity(entityID);
+	    return this;
+	  },
+	  updateDetections: function updateDetections(imageKey, url) {
+	    if (!_mlyViewer || _mlyFallback) return;
+	    if (!imageKey) return;
 
-	        relatedEntities.push(entityID);
+	    if (!_mlyCache.image_detections.forImageKey[imageKey]) {
+	      loadData('image_detections', url).then(function () {
+	        showDetections(_mlyCache.image_detections.forImageKey[imageKey] || []);
+	      });
+	    } else {
+	      showDetections(_mlyCache.image_detections.forImageKey[imageKey]);
+	    }
 
-	        // Add click handler
-	        link
-	          .on('mouseenter', function () {
-	            utilHighlightEntities([entityID], true, context);
-	          })
-	          .on('mouseleave', function () {
-	            utilHighlightEntities([entityID], false, context);
-	          })
-	          .on('click', function () {
-	            event.preventDefault();
+	    function showDetections(detections) {
+	      detections.forEach(function (data) {
+	        var tag = makeTag(data);
 
-	            utilHighlightEntities([entityID], false, context);
+	        if (tag) {
+	          var tagComponent = _mlyViewer.getComponent('tag');
 
-	            var osmlayer = context.layers().layer('osm');
-	            if (!osmlayer.enabled()) {
-	              osmlayer.enabled(true);
-	            }
+	          tagComponent.add([tag]);
+	        }
+	      });
+	    }
 
-	            context.map().centerZoom(_qaItem.loc, 20);
+	    function makeTag(data) {
+	      var valueParts = data.value.split('--');
+	      if (!valueParts.length) return;
+	      var tag;
+	      var text;
+	      var color = 0xffffff;
 
-	            if (entity) {
-	              context.enter(modeSelect(context, [entityID]));
-	            } else {
-	              context.loadEntity(entityID, function () {
-	                context.enter(modeSelect(context, [entityID]));
-	              });
-	            }
-	          });
+	      if (_mlyHighlightedDetection === data.key) {
+	        color = 0xffff00;
+	        text = valueParts[1];
 
-	        // Replace with friendly name if possible
-	        // (The entity may not yet be loaded into the graph)
-	        if (entity) {
-	          var name = utilDisplayName(entity);  // try to use common name
+	        if (text === 'flat' || text === 'discrete' || text === 'sign') {
+	          text = valueParts[2];
+	        }
 
-	          if (!name && !isObjectLink) {
-	            var preset = _mainPresetIndex.match(entity, context.graph());
-	            name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-	          }
+	        text = text.replace(/-/g, ' ');
+	        text = text.charAt(0).toUpperCase() + text.slice(1);
+	        _mlyHighlightedDetection = null;
+	      }
 
-	          if (name) {
-	            this.innerText = name;
-	          }
-	        }
-	      });
+	      if (data.shape.type === 'Polygon') {
+	        var polygonGeometry = new Mapillary.TagComponent.PolygonGeometry(data.shape.coordinates[0]);
+	        tag = new Mapillary.TagComponent.OutlineTag(data.key, polygonGeometry, {
+	          text: text,
+	          textColor: color,
+	          lineColor: color,
+	          lineWidth: 2,
+	          fillColor: color,
+	          fillOpacity: 0.3
+	        });
+	      } else if (data.shape.type === 'Point') {
+	        var pointGeometry = new Mapillary.TagComponent.PointGeometry(data.shape.coordinates[0]);
+	        tag = new Mapillary.TagComponent.SpotTag(data.key, pointGeometry, {
+	          text: text,
+	          color: color,
+	          textColor: color
+	        });
+	      }
 
-	    // Don't hide entities related to this error - #5880
-	    context.features().forceVisible(relatedEntities);
-	    context.map().pan([0,0]);  // trigger a redraw
+	      return tag;
+	    }
+	  },
+	  cache: function cache() {
+	    return _mlyCache;
 	  }
+	};
 
-	  improveOsmDetails.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return improveOsmDetails;
-	  };
-
-	  return improveOsmDetails;
-	}
+	function validationIssue(attrs) {
+	  this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')
 
-	function uiImproveOsmHeader() {
-	  var _qaItem;
+	  this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
 
+	  this.severity = attrs.severity; // required - 'warning' or 'error'
 
-	  function issueTitle(d) {
-	    var issueKey = d.issueKey;
-	    d.replacements = d.replacements || {};
-	    d.replacements.default = _t('inspector.unknown');  // special key `default` works as a fallback string
-	    return _t(("QA.improveOSM.error_types." + issueKey + ".title"), d.replacements);
-	  }
+	  this.message = attrs.message; // required - function returning localized string
 
+	  this.reference = attrs.reference; // optional - function(selection) to render reference information
 
-	  function improveOsmHeader(selection) {
-	    var header = selection.selectAll('.qa-header')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	  this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue
 
-	    header.exit()
-	      .remove();
-
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'qa-header');
-
-	    var svgEnter = headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-icon')
-	        .classed('new', function (d) { return d.id < 0; })
-	      .append('svg')
-	        .attr('width', '20px')
-	        .attr('height', '30px')
-	        .attr('viewbox', '0 0 20 30')
-	        .attr('class', function (d) { return ("preset-icon-28 qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-	    svgEnter
-	      .append('polygon')
-	        .attr('fill', 'currentColor')
-	        .attr('class', 'qaItem-fill')
-	        .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-
-	    svgEnter
-	      .append('use')
-	        .attr('class', 'icon-annotation')
-	        .attr('width', '13px')
-	        .attr('height', '13px')
-	        .attr('transform', 'translate(3.5, 5)')
-	        .attr('xlink:href', function (d) {
-	          var picon = d.icon;
-	          if (!picon) {
-	            return '';
-	          } else {
-	            var isMaki = /^maki-/.test(picon);
-	            return ("#" + picon + (isMaki ? '-11' : ''));
-	          }
-	        });
+	  this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue
 
-	    headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-label')
-	        .text(issueTitle);
-	  }
+	  this.data = attrs.data; // optional - object containing extra data for the fixes
 
-	  improveOsmHeader.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return improveOsmHeader;
-	  };
+	  this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes
 
-	  return improveOsmHeader;
-	}
+	  this.hash = attrs.hash; // optional - string to further differentiate the issue
 
-	function uiImproveOsmEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiImproveOsmDetails(context);
-	  var qaComments = uiImproveOsmComments();
-	  var qaHeader = uiImproveOsmHeader();
+	  this.id = generateID.apply(this); // generated - see below
 
-	  var _qaItem;
+	  this.autoFix = null; // generated - if autofix exists, will be set below
+	  // A unique, deterministic string hash.
+	  // Issues with identical id values are considered identical.
 
-	  function improveOsmEditor(selection) {
+	  function generateID() {
+	    var parts = [this.type];
 
-	    var headerEnter = selection.selectAll('.header')
-	      .data([0])
-	      .enter()
-	      .append('div')
-	        .attr('class', 'header fillL');
+	    if (this.hash) {
+	      // subclasses can pass in their own differentiator
+	      parts.push(this.hash);
+	    }
 
-	    headerEnter
-	      .append('button')
-	        .attr('class', 'close')
-	        .on('click', function () { return context.enter(modeBrowse(context)); })
-	        .call(svgIcon('#iD-icon-close'));
+	    if (this.subtype) {
+	      parts.push(this.subtype);
+	    } // include the entities this issue is for
+	    // (sort them so the id is deterministic)
 
-	    headerEnter
-	      .append('h3')
-	        .text(_t('QA.improveOSM.title'));
 
-	    var body = selection.selectAll('.body')
-	      .data([0]);
+	    if (this.entityIds) {
+	      var entityKeys = this.entityIds.slice().sort();
+	      parts.push.apply(parts, entityKeys);
+	    }
 
-	    body = body.enter()
-	      .append('div')
-	        .attr('class', 'body')
-	      .merge(body);
+	    return parts.join(':');
+	  }
 
-	    var editor = body.selectAll('.qa-editor')
-	      .data([0]);
+	  this.extent = function (resolver) {
+	    if (this.loc) {
+	      return geoExtent(this.loc);
+	    }
 
-	    editor.enter()
-	      .append('div')
-	        .attr('class', 'modal-section qa-editor')
-	      .merge(editor)
-	        .call(qaHeader.issue(_qaItem))
-	        .call(qaDetails.issue(_qaItem))
-	        .call(qaComments.issue(_qaItem))
-	        .call(improveOsmSaveSection);
-	  }
+	    if (this.entityIds && this.entityIds.length) {
+	      return this.entityIds.reduce(function (extent, entityId) {
+	        return extent.extend(resolver.entity(entityId).extent(resolver));
+	      }, geoExtent());
+	    }
 
-	  function improveOsmSaveSection(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var isShown = (_qaItem && (isSelected || _qaItem.newComment || _qaItem.comment));
-	    var saveSection = selection.selectAll('.qa-save')
-	      .data(
-	        (isShown ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	    return null;
+	  };
 
-	    // exit
-	    saveSection.exit()
-	      .remove();
+	  this.fixes = function (context) {
+	    var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
+	    var issue = this;
 
-	    // enter
-	    var saveSectionEnter = saveSection.enter()
-	      .append('div')
-	        .attr('class', 'qa-save save-section cf');
-
-	    saveSectionEnter
-	      .append('h4')
-	        .attr('class', '.qa-save-header')
-	        .text(_t('note.newComment'));
-
-	    saveSectionEnter
-	      .append('textarea')
-	        .attr('class', 'new-comment-input')
-	        .attr('placeholder', _t('QA.keepRight.comment_placeholder'))
-	        .attr('maxlength', 1000)
-	        .property('value', function (d) { return d.newComment; })
-	        .call(utilNoAuto)
-	        .on('input', changeInput)
-	        .on('blur', changeInput);
+	    if (issue.severity === 'warning') {
+	      // allow ignoring any issue that's not an error
+	      fixes.push(new validationIssueFix({
+	        title: _t.html('issues.fix.ignore_issue.title'),
+	        icon: 'iD-icon-close',
+	        onClick: function onClick() {
+	          context.validator().ignoreIssue(this.issue.id);
+	        }
+	      }));
+	    }
 
-	    // update
-	    saveSection = saveSectionEnter
-	      .merge(saveSection)
-	        .call(qaSaveButtons);
+	    fixes.forEach(function (fix) {
+	      // the id doesn't matter as long as it's unique to this issue/fix
+	      fix.id = fix.title; // add a reference to the issue for use in actions
 
-	    function changeInput() {
-	      var input = select(this);
-	      var val = input.property('value').trim();
+	      fix.issue = issue;
 
-	      if (val === '') {
-	        val = undefined;
+	      if (fix.autoArgs) {
+	        issue.autoFix = fix;
 	      }
+	    });
+	    return fixes;
+	  };
+	}
+	function validationIssueFix(attrs) {
+	  this.title = attrs.title; // Required
 
-	      // store the unsaved comment with the issue itself
-	      _qaItem = _qaItem.update({ newComment: val });
+	  this.onClick = attrs.onClick; // Optional - the function to run to apply the fix
 
-	      var qaService = services.improveOSM;
-	      if (qaService) {
-	        qaService.replaceItem(_qaItem);
-	      }
+	  this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
 
-	      saveSection
-	        .call(qaSaveButtons);
-	    }
-	  }
+	  this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set
 
-	  function qaSaveButtons(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var buttonSection = selection.selectAll('.buttons')
-	      .data((isSelected ? [_qaItem] : []), function (d) { return d.status + d.id; });
+	  this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.
 
-	    // exit
-	    buttonSection.exit()
-	      .remove();
+	  this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run
 
-	    // enter
-	    var buttonEnter = buttonSection.enter()
-	      .append('div')
-	        .attr('class', 'buttons');
+	  this.issue = null; // Generated link - added by validationIssue
+	}
+
+	var buildRuleChecks = function buildRuleChecks() {
+	  return {
+	    equals: function equals(_equals) {
+	      return function (tags) {
+	        return Object.keys(_equals).every(function (k) {
+	          return _equals[k] === tags[k];
+	        });
+	      };
+	    },
+	    notEquals: function notEquals(_notEquals) {
+	      return function (tags) {
+	        return Object.keys(_notEquals).some(function (k) {
+	          return _notEquals[k] !== tags[k];
+	        });
+	      };
+	    },
+	    absence: function absence(_absence) {
+	      return function (tags) {
+	        return Object.keys(tags).indexOf(_absence) === -1;
+	      };
+	    },
+	    presence: function presence(_presence) {
+	      return function (tags) {
+	        return Object.keys(tags).indexOf(_presence) > -1;
+	      };
+	    },
+	    greaterThan: function greaterThan(_greaterThan) {
+	      var key = Object.keys(_greaterThan)[0];
+	      var value = _greaterThan[key];
+	      return function (tags) {
+	        return tags[key] > value;
+	      };
+	    },
+	    greaterThanEqual: function greaterThanEqual(_greaterThanEqual) {
+	      var key = Object.keys(_greaterThanEqual)[0];
+	      var value = _greaterThanEqual[key];
+	      return function (tags) {
+	        return tags[key] >= value;
+	      };
+	    },
+	    lessThan: function lessThan(_lessThan) {
+	      var key = Object.keys(_lessThan)[0];
+	      var value = _lessThan[key];
+	      return function (tags) {
+	        return tags[key] < value;
+	      };
+	    },
+	    lessThanEqual: function lessThanEqual(_lessThanEqual) {
+	      var key = Object.keys(_lessThanEqual)[0];
+	      var value = _lessThanEqual[key];
+	      return function (tags) {
+	        return tags[key] <= value;
+	      };
+	    },
+	    positiveRegex: function positiveRegex(_positiveRegex) {
+	      var tagKey = Object.keys(_positiveRegex)[0];
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button comment-button action')
-	        .text(_t('QA.keepRight.save_comment'));
+	      var expression = _positiveRegex[tagKey].join('|');
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button close-button action');
+	      var regex = new RegExp(expression);
+	      return function (tags) {
+	        return regex.test(tags[tagKey]);
+	      };
+	    },
+	    negativeRegex: function negativeRegex(_negativeRegex) {
+	      var tagKey = Object.keys(_negativeRegex)[0];
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button ignore-button action');
+	      var expression = _negativeRegex[tagKey].join('|');
 
-	    // update
-	    buttonSection = buttonSection
-	      .merge(buttonEnter);
+	      var regex = new RegExp(expression);
+	      return function (tags) {
+	        return !regex.test(tags[tagKey]);
+	      };
+	    }
+	  };
+	};
 
-	    buttonSection.select('.comment-button')
-	      .attr('disabled', function (d) { return d.newComment ? null : true; })
-	      .on('click.comment', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.improveOSM;
-	        if (qaService) {
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	var buildLineKeys = function buildLineKeys() {
+	  return {
+	    highway: {
+	      rest_area: true,
+	      services: true
+	    },
+	    railway: {
+	      roundhouse: true,
+	      station: true,
+	      traverser: true,
+	      turntable: true,
+	      wash: true
+	    }
+	  };
+	};
 
-	    buttonSection.select('.close-button')
-	      .text(function (d) {
-	        var andComment = (d.newComment ? '_comment' : '');
-	        return _t(("QA.keepRight.close" + andComment));
-	      })
-	      .on('click.close', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.improveOSM;
-	        if (qaService) {
-	          d.newStatus = 'SOLVED';
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	var serviceMapRules = {
+	  init: function init() {
+	    this._ruleChecks = buildRuleChecks();
+	    this._validationRules = [];
+	    this._areaKeys = osmAreaKeys;
+	    this._lineKeys = buildLineKeys();
+	  },
+	  // list of rules only relevant to tag checks...
+	  filterRuleChecks: function filterRuleChecks(selector) {
+	    var _ruleChecks = this._ruleChecks;
+	    return Object.keys(selector).reduce(function (rules, key) {
+	      if (['geometry', 'error', 'warning'].indexOf(key) === -1) {
+	        rules.push(_ruleChecks[key](selector[key]));
+	      }
 
-	    buttonSection.select('.ignore-button')
-	      .text(function (d) {
-	        var andComment = (d.newComment ? '_comment' : '');
-	        return _t(("QA.keepRight.ignore" + andComment));
-	      })
-	      .on('click.ignore', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.improveOSM;
-	        if (qaService) {
-	          d.newStatus = 'INVALID';
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
+	      return rules;
+	    }, []);
+	  },
+	  // builds tagMap from mapcss-parse selector object...
+	  buildTagMap: function buildTagMap(selector) {
+	    var getRegexValues = function getRegexValues(regexes) {
+	      return regexes.map(function (regex) {
+	        return regex.replace(/\$|\^/g, '');
 	      });
-	  }
+	    };
 
-	  // NOTE: Don't change method name until UI v3 is merged
-	  improveOsmEditor.error = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return improveOsmEditor;
-	  };
+	    var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
+	      var values;
+	      var isRegex = /regex/gi.test(key);
+	      var isEqual = /equals/gi.test(key);
 
-	  return utilRebind(improveOsmEditor, dispatch$1, 'on');
-	}
+	      if (isRegex || isEqual) {
+	        Object.keys(selector[key]).forEach(function (selectorKey) {
+	          values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
 
-	function uiKeepRightDetails(context) {
-	  var _qaItem;
+	          if (expectedTags.hasOwnProperty(selectorKey)) {
+	            values = values.concat(expectedTags[selectorKey]);
+	          }
 
+	          expectedTags[selectorKey] = values;
+	        });
+	      } else if (/(greater|less)Than(Equal)?|presence/g.test(key)) {
+	        var tagKey = /presence/.test(key) ? selector[key] : Object.keys(selector[key])[0];
+	        values = [selector[key][tagKey]];
 
-	  function issueDetail(d) {
-	    var itemType = d.itemType;
-	    var parentIssueType = d.parentIssueType;
-	    var unknown = _t('inspector.unknown');
-	    var replacements = d.replacements || {};
-	    replacements.default = unknown;  // special key `default` works as a fallback string
+	        if (expectedTags.hasOwnProperty(tagKey)) {
+	          values = values.concat(expectedTags[tagKey]);
+	        }
 
-	    var detail = _t(("QA.keepRight.errorTypes." + itemType + ".description"), replacements);
-	    if (detail === unknown) {
-	      detail = _t(("QA.keepRight.errorTypes." + parentIssueType + ".description"), replacements);
-	    }
-	    return detail;
-	  }
+	        expectedTags[tagKey] = values;
+	      }
 
+	      return expectedTags;
+	    }, {});
+	    return tagMap;
+	  },
+	  // inspired by osmWay#isArea()
+	  inferGeometry: function inferGeometry(tagMap) {
+	    var _lineKeys = this._lineKeys;
+	    var _areaKeys = this._areaKeys;
 
-	  function keepRightDetails(selection) {
-	    var details = selection.selectAll('.error-details')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	    var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
+	      return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
+	    };
 
-	    details.exit()
-	      .remove();
+	    var keyValueImpliesLine = function keyValueImpliesLine(key) {
+	      return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
+	    };
 
-	    var detailsEnter = details.enter()
-	      .append('div')
-	        .attr('class', 'error-details qa-details-container');
+	    if (tagMap.hasOwnProperty('area')) {
+	      if (tagMap.area.indexOf('yes') > -1) {
+	        return 'area';
+	      }
 
-	    // description
-	    var descriptionEnter = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	      if (tagMap.area.indexOf('no') > -1) {
+	        return 'line';
+	      }
+	    }
 
-	    descriptionEnter
-	      .append('h4')
-	        .text(function () { return _t('QA.keepRight.detail_description'); });
+	    for (var key in tagMap) {
+	      if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
+	        return 'area';
+	      }
 
-	    descriptionEnter
-	      .append('div')
-	        .attr('class', 'qa-details-description-text')
-	        .html(issueDetail);
+	      if (key in _lineKeys && keyValueImpliesLine(key)) {
+	        return 'area';
+	      }
+	    }
 
-	    // If there are entity links in the error message..
-	    var relatedEntities = [];
-	    descriptionEnter.selectAll('.error_entity_link, .error_object_link')
-	      .each(function() {
-	        var link = select(this);
-	        var isObjectLink = link.classed('error_object_link');
-	        var entityID = isObjectLink ?
-	          (utilEntityRoot(_qaItem.objectType) + _qaItem.objectId)
-	          : this.textContent;
-	        var entity = context.hasEntity(entityID);
+	    return 'line';
+	  },
+	  // adds from mapcss-parse selector check...
+	  addRule: function addRule(selector) {
+	    var rule = {
+	      // checks relevant to mapcss-selector
+	      checks: this.filterRuleChecks(selector),
+	      // true if all conditions for a tag error are true..
+	      matches: function matches(entity) {
+	        return this.checks.every(function (check) {
+	          return check(entity.tags);
+	        });
+	      },
+	      // borrowed from Way#isArea()
+	      inferredGeometry: this.inferGeometry(this.buildTagMap(selector), this._areaKeys),
+	      geometryMatches: function geometryMatches(entity, graph) {
+	        if (entity.type === 'node' || entity.type === 'relation') {
+	          return selector.geometry === entity.type;
+	        } else if (entity.type === 'way') {
+	          return this.inferredGeometry === entity.geometry(graph);
+	        }
+	      },
+	      // when geometries match and tag matches are present, return a warning...
+	      findIssues: function findIssues(entity, graph, issues) {
+	        if (this.geometryMatches(entity, graph) && this.matches(entity)) {
+	          var severity = Object.keys(selector).indexOf('error') > -1 ? 'error' : 'warning';
+	          var _message = selector[severity];
+	          issues.push(new validationIssue({
+	            type: 'maprules',
+	            severity: severity,
+	            message: function message() {
+	              return _message;
+	            },
+	            entityIds: [entity.id]
+	          }));
+	        }
+	      }
+	    };
 
-	        relatedEntities.push(entityID);
+	    this._validationRules.push(rule);
+	  },
+	  clearRules: function clearRules() {
+	    this._validationRules = [];
+	  },
+	  // returns validationRules...
+	  validationRules: function validationRules() {
+	    return this._validationRules;
+	  },
+	  // returns ruleChecks
+	  ruleChecks: function ruleChecks() {
+	    return this._ruleChecks;
+	  }
+	};
 
-	        // Add click handler
-	        link
-	          .on('mouseenter', function () {
-	            utilHighlightEntities([entityID], true, context);
-	          })
-	          .on('mouseleave', function () {
-	            utilHighlightEntities([entityID], false, context);
-	          })
-	          .on('click', function () {
-	            event.preventDefault();
+	var apibase$1 = 'https://nominatim.openstreetmap.org/';
+	var _inflight = {};
 
-	            utilHighlightEntities([entityID], false, context);
+	var _nominatimCache;
 
-	            var osmlayer = context.layers().layer('osm');
-	            if (!osmlayer.enabled()) {
-	              osmlayer.enabled(true);
-	            }
+	var serviceNominatim = {
+	  init: function init() {
+	    _inflight = {};
+	    _nominatimCache = new RBush();
+	  },
+	  reset: function reset() {
+	    Object.values(_inflight).forEach(function (controller) {
+	      controller.abort();
+	    });
+	    _inflight = {};
+	    _nominatimCache = new RBush();
+	  },
+	  countryCode: function countryCode(location, callback) {
+	    this.reverse(location, function (err, result) {
+	      if (err) {
+	        return callback(err);
+	      } else if (result.address) {
+	        return callback(null, result.address.country_code);
+	      } else {
+	        return callback('Unable to geocode', null);
+	      }
+	    });
+	  },
+	  reverse: function reverse(loc, callback) {
+	    var cached = _nominatimCache.search({
+	      minX: loc[0],
+	      minY: loc[1],
+	      maxX: loc[0],
+	      maxY: loc[1]
+	    });
 
-	            context.map().centerZoomEase(_qaItem.loc, 20);
+	    if (cached.length > 0) {
+	      if (callback) callback(null, cached[0].data);
+	      return;
+	    }
 
-	            if (entity) {
-	              context.enter(modeSelect(context, [entityID]));
-	            } else {
-	              context.loadEntity(entityID, function () {
-	                context.enter(modeSelect(context, [entityID]));
-	              });
-	            }
-	          });
+	    var params = {
+	      zoom: 13,
+	      format: 'json',
+	      addressdetails: 1,
+	      lat: loc[1],
+	      lon: loc[0]
+	    };
+	    var url = apibase$1 + 'reverse?' + utilQsString(params);
+	    if (_inflight[url]) return;
+	    var controller = new AbortController();
+	    _inflight[url] = controller;
+	    d3_json(url, {
+	      signal: controller.signal
+	    }).then(function (result) {
+	      delete _inflight[url];
+
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	        // Replace with friendly name if possible
-	        // (The entity may not yet be loaded into the graph)
-	        if (entity) {
-	          var name = utilDisplayName(entity);  // try to use common name
+	      var extent = geoExtent(loc).padByMeters(200);
 
-	          if (!name && !isObjectLink) {
-	            var preset = _mainPresetIndex.match(entity, context.graph());
-	            name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-	          }
+	      _nominatimCache.insert(Object.assign(extent.bbox(), {
+	        data: result
+	      }));
 
-	          if (name) {
-	            this.innerText = name;
-	          }
-	        }
-	      });
+	      if (callback) callback(null, result);
+	    })["catch"](function (err) {
+	      delete _inflight[url];
+	      if (err.name === 'AbortError') return;
+	      if (callback) callback(err.message);
+	    });
+	  },
+	  search: function search(val, callback) {
+	    var searchVal = encodeURIComponent(val);
+	    var url = apibase$1 + 'search/' + searchVal + '?limit=10&format=json';
+	    if (_inflight[url]) return;
+	    var controller = new AbortController();
+	    _inflight[url] = controller;
+	    d3_json(url, {
+	      signal: controller.signal
+	    }).then(function (result) {
+	      delete _inflight[url];
+
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	    // Don't hide entities related to this issue - #5880
-	    context.features().forceVisible(relatedEntities);
-	    context.map().pan([0,0]);  // trigger a redraw
+	      if (callback) callback(null, result);
+	    })["catch"](function (err) {
+	      delete _inflight[url];
+	      if (err.name === 'AbortError') return;
+	      if (callback) callback(err.message);
+	    });
 	  }
+	};
 
-	  keepRightDetails.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return keepRightDetails;
-	  };
+	var apibase$2 = 'https://openstreetcam.org';
+	var maxResults$1 = 1000;
+	var tileZoom$1 = 14;
+	var tiler$4 = utilTiler().zoomExtent([tileZoom$1, tileZoom$1]).skipNullIsland(true);
+	var dispatch$5 = dispatch('loadedImages');
+	var imgZoom = d3_zoom().extent([[0, 0], [320, 240]]).translateExtent([[0, 0], [320, 240]]).scaleExtent([1, 15]);
 
-	  return keepRightDetails;
-	}
+	var _oscCache;
 
-	function uiKeepRightHeader() {
-	  var _qaItem;
+	var _oscSelectedImage;
 
+	var _loadViewerPromise$1;
 
-	  function issueTitle(d) {
-	    var itemType = d.itemType;
-	    var parentIssueType = d.parentIssueType;
-	    var unknown = _t('inspector.unknown');
-	    var replacements = d.replacements || {};
-	    replacements.default = unknown;  // special key `default` works as a fallback string
+	function abortRequest$4(controller) {
+	  controller.abort();
+	}
 
-	    var title = _t(("QA.keepRight.errorTypes." + itemType + ".title"), replacements);
-	    if (title === unknown) {
-	      title = _t(("QA.keepRight.errorTypes." + parentIssueType + ".title"), replacements);
-	    }
-	    return title;
-	  }
+	function maxPageAtZoom$1(z) {
+	  if (z < 15) return 2;
+	  if (z === 15) return 5;
+	  if (z === 16) return 10;
+	  if (z === 17) return 20;
+	  if (z === 18) return 40;
+	  if (z > 18) return 80;
+	}
 
+	function loadTiles$1(which, url, projection) {
+	  var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
+	  var tiles = tiler$4.getTiles(projection); // abort inflight requests that are no longer needed
 
-	  function keepRightHeader(selection) {
-	    var header = selection.selectAll('.qa-header')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	  var cache = _oscCache[which];
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k.indexOf(tile.id + ',') === 0;
+	    });
 
-	    header.exit()
-	      .remove();
+	    if (!wanted) {
+	      abortRequest$4(cache.inflight[k]);
+	      delete cache.inflight[k];
+	    }
+	  });
+	  tiles.forEach(function (tile) {
+	    loadNextTilePage$1(which, currZoom, url, tile);
+	  });
+	}
 
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'qa-header');
+	function loadNextTilePage$1(which, currZoom, url, tile) {
+	  var cache = _oscCache[which];
+	  var bbox = tile.extent.bbox();
+	  var maxPages = maxPageAtZoom$1(currZoom);
+	  var nextPage = cache.nextPage[tile.id] || 1;
+	  var params = utilQsString({
+	    ipp: maxResults$1,
+	    page: nextPage,
+	    // client_id: clientId,
+	    bbTopLeft: [bbox.maxY, bbox.minX].join(','),
+	    bbBottomRight: [bbox.minY, bbox.maxX].join(',')
+	  }, true);
+	  if (nextPage > maxPages) return;
+	  var id = tile.id + ',' + String(nextPage);
+	  if (cache.loaded[id] || cache.inflight[id]) return;
+	  var controller = new AbortController();
+	  cache.inflight[id] = controller;
+	  var options = {
+	    method: 'POST',
+	    signal: controller.signal,
+	    body: params,
+	    headers: {
+	      'Content-Type': 'application/x-www-form-urlencoded'
+	    }
+	  };
+	  d3_json(url, options).then(function (data) {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
 
-	    var iconEnter = headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-icon')
-	        .classed('new', function (d) { return d.id < 0; });
+	    if (!data || !data.currentPageItems || !data.currentPageItems.length) {
+	      throw new Error('No Data');
+	    }
 
-	    iconEnter
-	      .append('div')
-	        .attr('class', function (d) { return ("preset-icon-28 qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.parentIssueType)); })
-	        .call(svgIcon('#iD-icon-bolt', 'qaItem-fill'));
+	    var features = data.currentPageItems.map(function (item) {
+	      var loc = [+item.lng, +item.lat];
+	      var d;
 
-	    headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-label')
-	        .text(issueTitle);
-	  }
+	      if (which === 'images') {
+	        d = {
+	          loc: loc,
+	          key: item.id,
+	          ca: +item.heading,
+	          captured_at: item.shot_date || item.date_added,
+	          captured_by: item.username,
+	          imagePath: item.lth_name,
+	          sequence_id: item.sequence_id,
+	          sequence_index: +item.sequence_index
+	        }; // cache sequence info
 
+	        var seq = _oscCache.sequences[d.sequence_id];
 
-	  keepRightHeader.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return keepRightHeader;
-	  };
+	        if (!seq) {
+	          seq = {
+	            rotation: 0,
+	            images: []
+	          };
+	          _oscCache.sequences[d.sequence_id] = seq;
+	        }
 
-	  return keepRightHeader;
-	}
+	        seq.images[d.sequence_index] = d;
+	        _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
+	      }
 
-	function uiViewOnKeepRight() {
-	  var _qaItem;
+	      return {
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      };
+	    });
+	    cache.rtree.load(features);
 
-	  function viewOnKeepRight(selection) {
-	    var url;
-	    if (services.keepRight && (_qaItem instanceof QAItem)) {
-	      url = services.keepRight.issueURL(_qaItem);
+	    if (data.currentPageItems.length === maxResults$1) {
+	      // more pages to load
+	      cache.nextPage[tile.id] = nextPage + 1;
+	      loadNextTilePage$1(which, currZoom, url, tile);
+	    } else {
+	      cache.nextPage[tile.id] = Infinity; // no more pages to load
 	    }
 
-	    var link = selection.selectAll('.view-on-keepRight')
-	      .data(url ? [url] : []);
+	    if (which === 'images') {
+	      dispatch$5.call('loadedImages');
+	    }
+	  })["catch"](function () {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
+	  });
+	} // partition viewport into higher zoom tiles
 
-	    // exit
-	    link.exit()
-	      .remove();
 
-	    // enter
-	    var linkEnter = link.enter()
-	      .append('a')
-	        .attr('class', 'view-on-keepRight')
-	        .attr('target', '_blank')
-	        .attr('rel', 'noopener') // security measure
-	        .attr('href', function (d) { return d; })
-	        .call(svgIcon('#iD-icon-out-link', 'inline'));
+	function partitionViewport$1(projection) {
+	  var z = geoScaleToZoom(projection.scale());
+	  var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
 
-	    linkEnter
-	      .append('span')
-	        .text(_t('inspector.view_on_keepRight'));
-	  }
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // no more than `limit` results per partition.
 
-	  viewOnKeepRight.what = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return viewOnKeepRight;
-	  };
 
-	  return viewOnKeepRight;
+	function searchLimited$1(limit, projection, rtree) {
+	  limit = limit || 5;
+	  return partitionViewport$1(projection).reduce(function (result, extent) {
+	    var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+	      return d.data;
+	    });
+	    return found.length ? result.concat(found) : result;
+	  }, []);
 	}
 
-	function uiKeepRightEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiKeepRightDetails(context);
-	  var qaHeader = uiKeepRightHeader();
+	var serviceOpenstreetcam = {
+	  init: function init() {
+	    if (!_oscCache) {
+	      this.reset();
+	    }
 
-	  var _qaItem;
+	    this.event = utilRebind(this, dispatch$5, 'on');
+	  },
+	  reset: function reset() {
+	    if (_oscCache) {
+	      Object.values(_oscCache.images.inflight).forEach(abortRequest$4);
+	    }
 
-	  function keepRightEditor(selection) {
+	    _oscCache = {
+	      images: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        rtree: new RBush(),
+	        forImageKey: {}
+	      },
+	      sequences: {}
+	    };
+	    _oscSelectedImage = null;
+	  },
+	  images: function images(projection) {
+	    var limit = 5;
+	    return searchLimited$1(limit, projection, _oscCache.images.rtree);
+	  },
+	  sequences: function sequences(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    var sequenceKeys = {}; // all sequences for images in viewport
 
-	    var headerEnter = selection.selectAll('.header')
-	      .data([0])
-	      .enter()
-	      .append('div')
-	        .attr('class', 'header fillL');
+	    _oscCache.images.rtree.search(bbox).forEach(function (d) {
+	      sequenceKeys[d.data.sequence_id] = true;
+	    }); // make linestrings from those sequences
 
-	    headerEnter
-	      .append('button')
-	        .attr('class', 'close')
-	        .on('click', function () { return context.enter(modeBrowse(context)); })
-	        .call(svgIcon('#iD-icon-close'));
 
-	    headerEnter
-	      .append('h3')
-	        .text(_t('QA.keepRight.title'));
+	    var lineStrings = [];
+	    Object.keys(sequenceKeys).forEach(function (sequenceKey) {
+	      var seq = _oscCache.sequences[sequenceKey];
+	      var images = seq && seq.images;
+
+	      if (images) {
+	        lineStrings.push({
+	          type: 'LineString',
+	          coordinates: images.map(function (d) {
+	            return d.loc;
+	          }).filter(Boolean),
+	          properties: {
+	            captured_at: images[0] ? images[0].captured_at : null,
+	            captured_by: images[0] ? images[0].captured_by : null,
+	            key: sequenceKey
+	          }
+	        });
+	      }
+	    });
+	    return lineStrings;
+	  },
+	  cachedImage: function cachedImage(imageKey) {
+	    return _oscCache.images.forImageKey[imageKey];
+	  },
+	  loadImages: function loadImages(projection) {
+	    var url = apibase$2 + '/1.0/list/nearby-photos/';
+	    loadTiles$1('images', url, projection);
+	  },
+	  ensureViewerLoaded: function ensureViewerLoaded(context) {
+	    if (_loadViewerPromise$1) return _loadViewerPromise$1; // add osc-wrapper
 
+	    var wrap = context.container().select('.photoviewer').selectAll('.osc-wrapper').data([0]);
+	    var that = this;
+	    var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper osc-wrapper').classed('hide', true).call(imgZoom.on('zoom', zoomPan)).on('dblclick.zoom', null);
+	    wrapEnter.append('div').attr('class', 'photo-attribution fillD');
+	    var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
+	    controlsEnter.append('button').on('click.back', step(-1)).html('◄');
+	    controlsEnter.append('button').on('click.rotate-ccw', rotate(-90)).html('⤿');
+	    controlsEnter.append('button').on('click.rotate-cw', rotate(90)).html('⤾');
+	    controlsEnter.append('button').on('click.forward', step(1)).html('►');
+	    wrapEnter.append('div').attr('class', 'osc-image-wrap'); // Register viewer resize handler
+
+	    context.ui().photoviewer.on('resize.openstreetcam', function (dimensions) {
+	      imgZoom = d3_zoom().extent([[0, 0], dimensions]).translateExtent([[0, 0], dimensions]).scaleExtent([1, 15]).on('zoom', zoomPan);
+	    });
 
-	    var body = selection.selectAll('.body')
-	      .data([0]);
+	    function zoomPan(d3_event) {
+	      var t = d3_event.transform;
+	      context.container().select('.photoviewer .osc-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
+	    }
 
-	    body = body.enter()
-	      .append('div')
-	        .attr('class', 'body')
-	      .merge(body);
+	    function rotate(deg) {
+	      return function () {
+	        if (!_oscSelectedImage) return;
+	        var sequenceKey = _oscSelectedImage.sequence_id;
+	        var sequence = _oscCache.sequences[sequenceKey];
+	        if (!sequence) return;
+	        var r = sequence.rotation || 0;
+	        r += deg;
+	        if (r > 180) r -= 360;
+	        if (r < -180) r += 360;
+	        sequence.rotation = r;
+	        var wrap = context.container().select('.photoviewer .osc-wrapper');
+	        wrap.transition().duration(100).call(imgZoom.transform, identity$2);
+	        wrap.selectAll('.osc-image').transition().duration(100).style('transform', 'rotate(' + r + 'deg)');
+	      };
+	    }
 
-	    var editor = body.selectAll('.qa-editor')
-	      .data([0]);
+	    function step(stepBy) {
+	      return function () {
+	        if (!_oscSelectedImage) return;
+	        var sequenceKey = _oscSelectedImage.sequence_id;
+	        var sequence = _oscCache.sequences[sequenceKey];
+	        if (!sequence) return;
+	        var nextIndex = _oscSelectedImage.sequence_index + stepBy;
+	        var nextImage = sequence.images[nextIndex];
+	        if (!nextImage) return;
+	        context.map().centerEase(nextImage.loc);
+	        that.selectImage(context, nextImage.key);
+	      };
+	    } // don't need any async loading so resolve immediately
 
-	    editor.enter()
-	      .append('div')
-	        .attr('class', 'modal-section qa-editor')
-	      .merge(editor)
-	        .call(qaHeader.issue(_qaItem))
-	        .call(qaDetails.issue(_qaItem))
-	        .call(keepRightSaveSection);
 
+	    _loadViewerPromise$1 = Promise.resolve();
+	    return _loadViewerPromise$1;
+	  },
+	  showViewer: function showViewer(context) {
+	    var viewer = context.container().select('.photoviewer').classed('hide', false);
+	    var isHidden = viewer.selectAll('.photo-wrapper.osc-wrapper.hide').size();
 
-	    var footer = selection.selectAll('.footer')
-	      .data([0]);
+	    if (isHidden) {
+	      viewer.selectAll('.photo-wrapper:not(.osc-wrapper)').classed('hide', true);
+	      viewer.selectAll('.photo-wrapper.osc-wrapper').classed('hide', false);
+	    }
 
-	    footer.enter()
-	      .append('div')
-	      .attr('class', 'footer')
-	      .merge(footer)
-	      .call(uiViewOnKeepRight().what(_qaItem));
-	  }
+	    return this;
+	  },
+	  hideViewer: function hideViewer(context) {
+	    _oscSelectedImage = null;
+	    this.updateUrlImage(null);
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(null);
+	    viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+	    context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
+	    return this.setStyles(context, null, true);
+	  },
+	  selectImage: function selectImage(context, imageKey) {
+	    var d = this.cachedImage(imageKey);
+	    _oscSelectedImage = d;
+	    this.updateUrlImage(imageKey);
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(d);
+	    this.setStyles(context, null, true);
+	    context.container().selectAll('.icon-sign').classed('currentView', false);
+	    if (!d) return this;
+	    var wrap = context.container().select('.photoviewer .osc-wrapper');
+	    var imageWrap = wrap.selectAll('.osc-image-wrap');
+	    var attribution = wrap.selectAll('.photo-attribution').html('');
+	    wrap.transition().duration(100).call(imgZoom.transform, identity$2);
+	    imageWrap.selectAll('.osc-image').remove();
 
+	    if (d) {
+	      var sequence = _oscCache.sequences[d.sequence_id];
+	      var r = sequence && sequence.rotation || 0;
+	      imageWrap.append('img').attr('class', 'osc-image').attr('src', apibase$2 + '/' + d.imagePath).style('transform', 'rotate(' + r + 'deg)');
 
-	  function keepRightSaveSection(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var isShown = (_qaItem && (isSelected || _qaItem.newComment || _qaItem.comment));
-	    var saveSection = selection.selectAll('.qa-save')
-	      .data(
-	        (isShown ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	      if (d.captured_by) {
+	        attribution.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://openstreetcam.org/user/' + encodeURIComponent(d.captured_by)).html('@' + d.captured_by);
+	        attribution.append('span').html('|');
+	      }
 
-	    // exit
-	    saveSection.exit()
-	      .remove();
+	      if (d.captured_at) {
+	        attribution.append('span').attr('class', 'captured_at').html(localeDateString(d.captured_at));
+	        attribution.append('span').html('|');
+	      }
 
-	    // enter
-	    var saveSectionEnter = saveSection.enter()
-	      .append('div')
-	        .attr('class', 'qa-save save-section cf');
-
-	    saveSectionEnter
-	      .append('h4')
-	        .attr('class', '.qa-save-header')
-	        .text(_t('QA.keepRight.comment'));
-
-	    saveSectionEnter
-	      .append('textarea')
-	        .attr('class', 'new-comment-input')
-	        .attr('placeholder', _t('QA.keepRight.comment_placeholder'))
-	        .attr('maxlength', 1000)
-	        .property('value', function (d) { return d.newComment || d.comment; })
-	        .call(utilNoAuto)
-	        .on('input', changeInput)
-	        .on('blur', changeInput);
+	      attribution.append('a').attr('class', 'image-link').attr('target', '_blank').attr('href', 'https://openstreetcam.org/details/' + d.sequence_id + '/' + d.sequence_index).html('openstreetcam.org');
+	    }
 
-	    // update
-	    saveSection = saveSectionEnter
-	      .merge(saveSection)
-	        .call(qaSaveButtons);
+	    return this;
 
-	    function changeInput() {
-	      var input = select(this);
-	      var val = input.property('value').trim();
+	    function localeDateString(s) {
+	      if (!s) return null;
+	      var options = {
+	        day: 'numeric',
+	        month: 'short',
+	        year: 'numeric'
+	      };
+	      var d = new Date(s);
+	      if (isNaN(d.getTime())) return null;
+	      return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	    }
+	  },
+	  getSelectedImage: function getSelectedImage() {
+	    return _oscSelectedImage;
+	  },
+	  getSequenceKeyForImage: function getSequenceKeyForImage(d) {
+	    return d && d.sequence_id;
+	  },
+	  // Updates the currently highlighted sequence and selected bubble.
+	  // Reset is only necessary when interacting with the viewport because
+	  // this implicitly changes the currently selected bubble/sequence
+	  setStyles: function setStyles(context, hovered, reset) {
+	    if (reset) {
+	      // reset all layers
+	      context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
+	      context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
+	    }
+
+	    var hoveredImageKey = hovered && hovered.key;
+	    var hoveredSequenceKey = this.getSequenceKeyForImage(hovered);
+	    var hoveredSequence = hoveredSequenceKey && _oscCache.sequences[hoveredSequenceKey];
+	    var hoveredImageKeys = hoveredSequence && hoveredSequence.images.map(function (d) {
+	      return d.key;
+	    }) || [];
+	    var viewer = context.container().select('.photoviewer');
+	    var selected = viewer.empty() ? undefined : viewer.datum();
+	    var selectedImageKey = selected && selected.key;
+	    var selectedSequenceKey = this.getSequenceKeyForImage(selected);
+	    var selectedSequence = selectedSequenceKey && _oscCache.sequences[selectedSequenceKey];
+	    var selectedImageKeys = selectedSequence && selectedSequence.images.map(function (d) {
+	      return d.key;
+	    }) || []; // highlight sibling viewfields on either the selected or the hovered sequences
+
+	    var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
+	    context.container().selectAll('.layer-openstreetcam .viewfield-group').classed('highlighted', function (d) {
+	      return highlightedImageKeys.indexOf(d.key) !== -1;
+	    }).classed('hovered', function (d) {
+	      return d.key === hoveredImageKey;
+	    }).classed('currentView', function (d) {
+	      return d.key === selectedImageKey;
+	    });
+	    context.container().selectAll('.layer-openstreetcam .sequence').classed('highlighted', function (d) {
+	      return d.properties.key === hoveredSequenceKey;
+	    }).classed('currentView', function (d) {
+	      return d.properties.key === selectedSequenceKey;
+	    }); // update viewfields if needed
 
-	      if (val === _qaItem.comment) {
-	        val = undefined;
+	    context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
+
+	      if (d.pano && d.key !== selectedImageKey) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
 	      }
+	    }
 
-	      // store the unsaved comment with the issue itself
-	      _qaItem = _qaItem.update({ newComment: val });
+	    return this;
+	  },
+	  updateUrlImage: function updateUrlImage(imageKey) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	      var qaService = services.keepRight;
-	      if (qaService) {
-	        qaService.replaceItem(_qaItem);  // update keepright cache
+	      if (imageKey) {
+	        hash.photo = 'openstreetcam/' + imageKey;
+	      } else {
+	        delete hash.photo;
 	      }
 
-	      saveSection
-	        .call(qaSaveButtons);
+	      window.location.replace('#' + utilQsString(hash, true));
 	    }
+	  },
+	  cache: function cache() {
+	    return _oscCache;
 	  }
+	};
 
+	var FORCED$f = fails(function () {
+	  return new Date(NaN).toJSON() !== null
+	    || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
+	});
 
-	  function qaSaveButtons(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var buttonSection = selection.selectAll('.buttons')
-	      .data((isSelected ? [_qaItem] : []), function (d) { return d.status + d.id; });
+	// `Date.prototype.toJSON` method
+	// https://tc39.github.io/ecma262/#sec-date.prototype.tojson
+	_export({ target: 'Date', proto: true, forced: FORCED$f }, {
+	  // eslint-disable-next-line no-unused-vars
+	  toJSON: function toJSON(key) {
+	    var O = toObject(this);
+	    var pv = toPrimitive(O);
+	    return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
+	  }
+	});
 
-	    // exit
-	    buttonSection.exit()
-	      .remove();
+	// `URL.prototype.toJSON` method
+	// https://url.spec.whatwg.org/#dom-url-tojson
+	_export({ target: 'URL', proto: true, enumerable: true }, {
+	  toJSON: function toJSON() {
+	    return URL.prototype.toString.call(this);
+	  }
+	});
 
-	    // enter
-	    var buttonEnter = buttonSection.enter()
-	      .append('div')
-	        .attr('class', 'buttons');
+	/**
+	 * Checks if `value` is the
+	 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
+	 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.1.0
+	 * @category Lang
+	 * @param {*} value The value to check.
+	 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+	 * @example
+	 *
+	 * _.isObject({});
+	 * // => true
+	 *
+	 * _.isObject([1, 2, 3]);
+	 * // => true
+	 *
+	 * _.isObject(_.noop);
+	 * // => true
+	 *
+	 * _.isObject(null);
+	 * // => false
+	 */
+	function isObject$1(value) {
+	  var type = _typeof(value);
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button comment-button action')
-	        .text(_t('QA.keepRight.save_comment'));
+	  return value != null && (type == 'object' || type == 'function');
+	}
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button close-button action');
+	/** Detect free variable `global` from Node.js. */
+	var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button ignore-button action');
+	/** Detect free variable `self`. */
 
-	    // update
-	    buttonSection = buttonSection
-	      .merge(buttonEnter);
+	var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
+	/** Used as a reference to the global object. */
 
-	    buttonSection.select('.comment-button')   // select and propagate data
-	      .attr('disabled', function (d) { return d.newComment ? null : true; })
-	      .on('click.comment', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.keepRight;
-	        if (qaService) {
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	var root$1 = freeGlobal || freeSelf || Function('return this')();
 
-	    buttonSection.select('.close-button')   // select and propagate data
-	      .text(function (d) {
-	        var andComment = (d.newComment ? '_comment' : '');
-	        return _t(("QA.keepRight.close" + andComment));
-	      })
-	      .on('click.close', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.keepRight;
-	        if (qaService) {
-	          d.newStatus = 'ignore_t';   // ignore temporarily (item fixed)
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	/**
+	 * Gets the timestamp of the number of milliseconds that have elapsed since
+	 * the Unix epoch (1 January 1970 00:00:00 UTC).
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 2.4.0
+	 * @category Date
+	 * @returns {number} Returns the timestamp.
+	 * @example
+	 *
+	 * _.defer(function(stamp) {
+	 *   console.log(_.now() - stamp);
+	 * }, _.now());
+	 * // => Logs the number of milliseconds it took for the deferred invocation.
+	 */
 
-	    buttonSection.select('.ignore-button')   // select and propagate data
-	      .text(function (d) {
-	        var andComment = (d.newComment ? '_comment' : '');
-	        return _t(("QA.keepRight.ignore" + andComment));
-	      })
-	      .on('click.ignore', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.keepRight;
-	        if (qaService) {
-	          d.newStatus = 'ignore';   // ignore permanently (false positive)
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
-	  }
+	var now$1 = function now() {
+	  return root$1.Date.now();
+	};
 
-	  // NOTE: Don't change method name until UI v3 is merged
-	  keepRightEditor.error = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return keepRightEditor;
-	  };
+	/** Built-in value references. */
 
-	  return utilRebind(keepRightEditor, dispatch$1, 'on');
-	}
+	var _Symbol = root$1.Symbol;
 
-	function uiOsmoseDetails(context) {
-	  var _qaItem;
+	/** Used for built-in method references. */
 
-	  function issueString(d, type) {
-	    if (!d) { return ''; }
+	var objectProto = Object.prototype;
+	/** Used to check objects for own properties. */
 
-	    // Issue strings are cached from Osmose API
-	    var s = services.osmose.getStrings(d.itemType);
-	    return (type in s) ? s[type] : '';
-	  }
+	var hasOwnProperty$1 = objectProto.hasOwnProperty;
+	/**
+	 * Used to resolve the
+	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+	 * of values.
+	 */
 
+	var nativeObjectToString = objectProto.toString;
+	/** Built-in value references. */
 
-	  function osmoseDetails(selection) {
-	    var details = selection.selectAll('.error-details')
-	      .data(
-	        _qaItem ? [_qaItem] : [],
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	var symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;
+	/**
+	 * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+	 *
+	 * @private
+	 * @param {*} value The value to query.
+	 * @returns {string} Returns the raw `toStringTag`.
+	 */
 
-	    details.exit()
-	      .remove();
+	function getRawTag(value) {
+	  var isOwn = hasOwnProperty$1.call(value, symToStringTag),
+	      tag = value[symToStringTag];
 
-	    var detailsEnter = details.enter()
-	      .append('div')
-	        .attr('class', 'error-details qa-details-container');
+	  try {
+	    value[symToStringTag] = undefined;
+	    var unmasked = true;
+	  } catch (e) {}
 
+	  var result = nativeObjectToString.call(value);
 
-	    // Description
-	    if (issueString(_qaItem, 'detail')) {
-	      var div = detailsEnter
-	        .append('div')
-	          .attr('class', 'qa-details-subsection');
+	  if (unmasked) {
+	    if (isOwn) {
+	      value[symToStringTag] = tag;
+	    } else {
+	      delete value[symToStringTag];
+	    }
+	  }
 
-	      div
-	        .append('h4')
-	          .text(function () { return _t('QA.keepRight.detail_description'); });
+	  return result;
+	}
 
-	      div
-	        .append('p')
-	          .attr('class', 'qa-details-description-text')
-	          .html(function (d) { return issueString(d, 'detail'); })
-	        .selectAll('a')
-	          .attr('rel', 'noopener')
-	          .attr('target', '_blank');
-	    }
+	/** Used for built-in method references. */
+	var objectProto$1 = Object.prototype;
+	/**
+	 * Used to resolve the
+	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+	 * of values.
+	 */
 
-	    // Elements (populated later as data is requested)
-	    var detailsDiv = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	var nativeObjectToString$1 = objectProto$1.toString;
+	/**
+	 * Converts `value` to a string using `Object.prototype.toString`.
+	 *
+	 * @private
+	 * @param {*} value The value to convert.
+	 * @returns {string} Returns the converted string.
+	 */
 
-	    var elemsDiv = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	function objectToString$1(value) {
+	  return nativeObjectToString$1.call(value);
+	}
 
-	    // Suggested Fix (musn't exist for every issue type)
-	    if (issueString(_qaItem, 'fix')) {
-	      var div$1 = detailsEnter
-	        .append('div')
-	          .attr('class', 'qa-details-subsection');
+	/** `Object#toString` result references. */
 
-	      div$1
-	        .append('h4')
-	          .text(function () { return _t('QA.osmose.fix_title'); });
+	var nullTag = '[object Null]',
+	    undefinedTag = '[object Undefined]';
+	/** Built-in value references. */
 
-	      div$1
-	        .append('p')
-	          .html(function (d) { return issueString(d, 'fix'); })
-	        .selectAll('a')
-	          .attr('rel', 'noopener')
-	          .attr('target', '_blank');
-	    }
+	var symToStringTag$1 = _Symbol ? _Symbol.toStringTag : undefined;
+	/**
+	 * The base implementation of `getTag` without fallbacks for buggy environments.
+	 *
+	 * @private
+	 * @param {*} value The value to query.
+	 * @returns {string} Returns the `toStringTag`.
+	 */
 
-	    // Common Pitfalls (musn't exist for every issue type)
-	    if (issueString(_qaItem, 'trap')) {
-	      var div$2 = detailsEnter
-	        .append('div')
-	          .attr('class', 'qa-details-subsection');
+	function baseGetTag(value) {
+	  if (value == null) {
+	    return value === undefined ? undefinedTag : nullTag;
+	  }
 
-	      div$2
-	        .append('h4')
-	          .text(function () { return _t('QA.osmose.trap_title'); });
+	  return symToStringTag$1 && symToStringTag$1 in Object(value) ? getRawTag(value) : objectToString$1(value);
+	}
 
-	      div$2
-	        .append('p')
-	          .html(function (d) { return issueString(d, 'trap'); })
-	        .selectAll('a')
-	          .attr('rel', 'noopener')
-	          .attr('target', '_blank');
-	    }
+	/**
+	 * Checks if `value` is object-like. A value is object-like if it's not `null`
+	 * and has a `typeof` result of "object".
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 4.0.0
+	 * @category Lang
+	 * @param {*} value The value to check.
+	 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+	 * @example
+	 *
+	 * _.isObjectLike({});
+	 * // => true
+	 *
+	 * _.isObjectLike([1, 2, 3]);
+	 * // => true
+	 *
+	 * _.isObjectLike(_.noop);
+	 * // => false
+	 *
+	 * _.isObjectLike(null);
+	 * // => false
+	 */
+	function isObjectLike(value) {
+	  return value != null && _typeof(value) == 'object';
+	}
 
-	    // Save current item to check if UI changed by time request resolves
-	    var thisItem = _qaItem;
-	    services.osmose.loadIssueDetail(_qaItem)
-	      .then(function (d) {
-	        // No details to add if there are no associated issue elements
-	        if (!d.elems || d.elems.length === 0) { return; }
+	/** `Object#toString` result references. */
 
-	        // Do nothing if UI has moved on by the time this resolves
-	        if (
-	          context.selectedErrorID() !== thisItem.id
-	          && context.container().selectAll((".qaItem.osmose.hover.itemId-" + (thisItem.id))).empty()
-	        ) { return; }
-
-	        // Things like keys and values are dynamically added to a subtitle string
-	        if (d.detail) {
-	          detailsDiv
-	            .append('h4')
-	              .text(function () { return _t('QA.osmose.detail_title'); });
-
-	          detailsDiv
-	            .append('p')
-	              .html(function (d) { return d.detail; })
-	            .selectAll('a')
-	              .attr('rel', 'noopener')
-	              .attr('target', '_blank');
-	        }
-
-	        // Create list of linked issue elements
-	        elemsDiv
-	          .append('h4')
-	            .text(function () { return _t('QA.osmose.elems_title'); });
-
-	        elemsDiv
-	          .append('ul').selectAll('li')
-	          .data(d.elems)
-	          .enter()
-	          .append('li')
-	          .append('a')
-	            .attr('class', 'error_entity_link')
-	            .text(function (d) { return d; })
-	            .each(function() {
-	              var link = select(this);
-	              var entityID = this.textContent;
-	              var entity = context.hasEntity(entityID);
-
-	              // Add click handler
-	              link
-	                .on('mouseenter', function () {
-	                  utilHighlightEntities([entityID], true, context);
-	                })
-	                .on('mouseleave', function () {
-	                  utilHighlightEntities([entityID], false, context);
-	                })
-	                .on('click', function () {
-	                  event.preventDefault();
+	var symbolTag = '[object Symbol]';
+	/**
+	 * Checks if `value` is classified as a `Symbol` primitive or object.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 4.0.0
+	 * @category Lang
+	 * @param {*} value The value to check.
+	 * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+	 * @example
+	 *
+	 * _.isSymbol(Symbol.iterator);
+	 * // => true
+	 *
+	 * _.isSymbol('abc');
+	 * // => false
+	 */
 
-	                  utilHighlightEntities([entityID], false, context);
+	function isSymbol$1(value) {
+	  return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
+	}
 
-	                  var osmlayer = context.layers().layer('osm');
-	                  if (!osmlayer.enabled()) {
-	                    osmlayer.enabled(true);
-	                  }
+	/** Used as references for various `Number` constants. */
 
-	                  context.map().centerZoom(d.loc, 20);
+	var NAN = 0 / 0;
+	/** Used to match leading and trailing whitespace. */
 
-	                  if (entity) {
-	                    context.enter(modeSelect(context, [entityID]));
-	                  } else {
-	                    context.loadEntity(entityID, function () {
-	                      context.enter(modeSelect(context, [entityID]));
-	                    });
-	                  }
-	                });
+	var reTrim = /^\s+|\s+$/g;
+	/** Used to detect bad signed hexadecimal string values. */
 
-	              // Replace with friendly name if possible
-	              // (The entity may not yet be loaded into the graph)
-	              if (entity) {
-	                var name = utilDisplayName(entity);  // try to use common name
+	var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+	/** Used to detect binary string values. */
 
-	                if (!name) {
-	                  var preset = _mainPresetIndex.match(entity, context.graph());
-	                  name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-	                }
+	var reIsBinary = /^0b[01]+$/i;
+	/** Used to detect octal string values. */
 
-	                if (name) {
-	                  this.innerText = name;
-	                }
-	              }
-	            });
+	var reIsOctal = /^0o[0-7]+$/i;
+	/** Built-in method references without a dependency on `root`. */
 
-	        // Don't hide entities related to this issue - #5880
-	        context.features().forceVisible(d.elems);
-	        context.map().pan([0,0]);  // trigger a redraw
-	      })
-	      .catch(function (err) {
-	        console.log(err); // eslint-disable-line no-console
-	      });
+	var freeParseInt = parseInt;
+	/**
+	 * Converts `value` to a number.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 4.0.0
+	 * @category Lang
+	 * @param {*} value The value to process.
+	 * @returns {number} Returns the number.
+	 * @example
+	 *
+	 * _.toNumber(3.2);
+	 * // => 3.2
+	 *
+	 * _.toNumber(Number.MIN_VALUE);
+	 * // => 5e-324
+	 *
+	 * _.toNumber(Infinity);
+	 * // => Infinity
+	 *
+	 * _.toNumber('3.2');
+	 * // => 3.2
+	 */
+
+	function toNumber$1(value) {
+	  if (typeof value == 'number') {
+	    return value;
 	  }
 
+	  if (isSymbol$1(value)) {
+	    return NAN;
+	  }
 
-	  osmoseDetails.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return osmoseDetails;
-	  };
+	  if (isObject$1(value)) {
+	    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
+	    value = isObject$1(other) ? other + '' : other;
+	  }
 
+	  if (typeof value != 'string') {
+	    return value === 0 ? value : +value;
+	  }
 
-	  return osmoseDetails;
+	  value = value.replace(reTrim, '');
+	  var isBinary = reIsBinary.test(value);
+	  return isBinary || reIsOctal.test(value) ? freeParseInt(value.slice(2), isBinary ? 2 : 8) : reIsBadHex.test(value) ? NAN : +value;
 	}
 
-	function uiOsmoseHeader() {
-	  var _qaItem;
+	/** Error message constants. */
 
-	  function issueTitle(d) {
-	    var unknown = _t('inspector.unknown');
+	var FUNC_ERROR_TEXT = 'Expected a function';
+	/* Built-in method references for those with the same name as other `lodash` methods. */
+
+	var nativeMax = Math.max,
+	    nativeMin = Math.min;
+	/**
+	 * Creates a debounced function that delays invoking `func` until after `wait`
+	 * milliseconds have elapsed since the last time the debounced function was
+	 * invoked. The debounced function comes with a `cancel` method to cancel
+	 * delayed `func` invocations and a `flush` method to immediately invoke them.
+	 * Provide `options` to indicate whether `func` should be invoked on the
+	 * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
+	 * with the last arguments provided to the debounced function. Subsequent
+	 * calls to the debounced function return the result of the last `func`
+	 * invocation.
+	 *
+	 * **Note:** If `leading` and `trailing` options are `true`, `func` is
+	 * invoked on the trailing edge of the timeout only if the debounced function
+	 * is invoked more than once during the `wait` timeout.
+	 *
+	 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+	 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+	 *
+	 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+	 * for details over the differences between `_.debounce` and `_.throttle`.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.1.0
+	 * @category Function
+	 * @param {Function} func The function to debounce.
+	 * @param {number} [wait=0] The number of milliseconds to delay.
+	 * @param {Object} [options={}] The options object.
+	 * @param {boolean} [options.leading=false]
+	 *  Specify invoking on the leading edge of the timeout.
+	 * @param {number} [options.maxWait]
+	 *  The maximum time `func` is allowed to be delayed before it's invoked.
+	 * @param {boolean} [options.trailing=true]
+	 *  Specify invoking on the trailing edge of the timeout.
+	 * @returns {Function} Returns the new debounced function.
+	 * @example
+	 *
+	 * // Avoid costly calculations while the window size is in flux.
+	 * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
+	 *
+	 * // Invoke `sendMail` when clicked, debouncing subsequent calls.
+	 * jQuery(element).on('click', _.debounce(sendMail, 300, {
+	 *   'leading': true,
+	 *   'trailing': false
+	 * }));
+	 *
+	 * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
+	 * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
+	 * var source = new EventSource('/stream');
+	 * jQuery(source).on('message', debounced);
+	 *
+	 * // Cancel the trailing debounced invocation.
+	 * jQuery(window).on('popstate', debounced.cancel);
+	 */
 
-	    if (!d) { return unknown; }
+	function debounce(func, wait, options) {
+	  var lastArgs,
+	      lastThis,
+	      maxWait,
+	      result,
+	      timerId,
+	      lastCallTime,
+	      lastInvokeTime = 0,
+	      leading = false,
+	      maxing = false,
+	      trailing = true;
 
-	    // Issue titles supplied by Osmose
-	    var s = services.osmose.getStrings(d.itemType);
-	    return ('title' in s) ? s.title : unknown;
+	  if (typeof func != 'function') {
+	    throw new TypeError(FUNC_ERROR_TEXT);
 	  }
 
-	  function osmoseHeader(selection) {
-	    var header = selection.selectAll('.qa-header')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
-
-	    header.exit()
-	      .remove();
-
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'qa-header');
-
-	    var svgEnter = headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-icon')
-	        .classed('new', function (d) { return d.id < 0; })
-	      .append('svg')
-	        .attr('width', '20px')
-	        .attr('height', '30px')
-	        .attr('viewbox', '0 0 20 30')
-	        .attr('class', function (d) { return ("preset-icon-28 qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-	    svgEnter
-	      .append('polygon')
-	        .attr('fill', function (d) { return services.osmose.getColor(d.item); })
-	        .attr('class', 'qaItem-fill')
-	        .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-
-	    svgEnter
-	      .append('use')
-	        .attr('class', 'icon-annotation')
-	        .attr('width', '13px')
-	        .attr('height', '13px')
-	        .attr('transform', 'translate(3.5, 5)')
-	        .attr('xlink:href', function (d) {
-	          var picon = d.icon;
-
-	          if (!picon) {
-	            return '';
-	          } else {
-	            var isMaki = /^maki-/.test(picon);
-	            return ("#" + picon + (isMaki ? '-11' : ''));
-	          }
-	        });
+	  wait = toNumber$1(wait) || 0;
 
-	    headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-label')
-	        .text(issueTitle);
+	  if (isObject$1(options)) {
+	    leading = !!options.leading;
+	    maxing = 'maxWait' in options;
+	    maxWait = maxing ? nativeMax(toNumber$1(options.maxWait) || 0, wait) : maxWait;
+	    trailing = 'trailing' in options ? !!options.trailing : trailing;
 	  }
 
-	  osmoseHeader.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return osmoseHeader;
-	  };
-
-	  return osmoseHeader;
-	}
-
-	function uiViewOnOsmose() {
-	  var _qaItem;
-
-	  function viewOnOsmose(selection) {
-	    var url;
-	    if (services.osmose && (_qaItem instanceof QAItem)) {
-	      url = services.osmose.itemURL(_qaItem);
-	    }
-
-	    var link = selection.selectAll('.view-on-osmose')
-	      .data(url ? [url] : []);
-
-	    // exit
-	    link.exit()
-	      .remove();
-
-	    // enter
-	    var linkEnter = link.enter()
-	      .append('a')
-	        .attr('class', 'view-on-osmose')
-	        .attr('target', '_blank')
-	        .attr('rel', 'noopener') // security measure
-	        .attr('href', function (d) { return d; })
-	        .call(svgIcon('#iD-icon-out-link', 'inline'));
-
-	    linkEnter
-	      .append('span')
-	        .text(_t('inspector.view_on_osmose'));
+	  function invokeFunc(time) {
+	    var args = lastArgs,
+	        thisArg = lastThis;
+	    lastArgs = lastThis = undefined;
+	    lastInvokeTime = time;
+	    result = func.apply(thisArg, args);
+	    return result;
 	  }
 
-	  viewOnOsmose.what = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return viewOnOsmose;
-	  };
-
-	  return viewOnOsmose;
-	}
-
-	function uiOsmoseEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiOsmoseDetails(context);
-	  var qaHeader = uiOsmoseHeader();
-
-	  var _qaItem;
-
-	  function osmoseEditor(selection) {
-
-	    var header = selection.selectAll('.header')
-	      .data([0]);
-
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'header fillL');
-
-	    headerEnter
-	      .append('button')
-	        .attr('class', 'close')
-	        .on('click', function () { return context.enter(modeBrowse(context)); })
-	        .call(svgIcon('#iD-icon-close'));
-
-	    headerEnter
-	      .append('h3')
-	        .text(_t('QA.osmose.title'));
-
-	    var body = selection.selectAll('.body')
-	      .data([0]);
+	  function leadingEdge(time) {
+	    // Reset any `maxWait` timer.
+	    lastInvokeTime = time; // Start the timer for the trailing edge.
 
-	    body = body.enter()
-	        .append('div')
-	        .attr('class', 'body')
-	      .merge(body);
+	    timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
 
-	    var editor = body.selectAll('.qa-editor')
-	      .data([0]);
+	    return leading ? invokeFunc(time) : result;
+	  }
 
-	    editor.enter()
-	      .append('div')
-	        .attr('class', 'modal-section qa-editor')
-	      .merge(editor)
-	        .call(qaHeader.issue(_qaItem))
-	        .call(qaDetails.issue(_qaItem))
-	        .call(osmoseSaveSection);
+	  function remainingWait(time) {
+	    var timeSinceLastCall = time - lastCallTime,
+	        timeSinceLastInvoke = time - lastInvokeTime,
+	        timeWaiting = wait - timeSinceLastCall;
+	    return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
+	  }
 
-	    var footer = selection.selectAll('.footer')
-	      .data([0]);
+	  function shouldInvoke(time) {
+	    var timeSinceLastCall = time - lastCallTime,
+	        timeSinceLastInvoke = time - lastInvokeTime; // Either this is the first call, activity has stopped and we're at the
+	    // trailing edge, the system time has gone backwards and we're treating
+	    // it as the trailing edge, or we've hit the `maxWait` limit.
 
-	    footer.enter()
-	      .append('div')
-	      .attr('class', 'footer')
-	      .merge(footer)
-	      .call(uiViewOnOsmose().what(_qaItem));
+	    return lastCallTime === undefined || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
 	  }
 
-	  function osmoseSaveSection(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var isShown = (_qaItem && isSelected);
-	    var saveSection = selection.selectAll('.qa-save')
-	      .data(
-	        (isShown ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	  function timerExpired() {
+	    var time = now$1();
 
-	    // exit
-	    saveSection.exit()
-	      .remove();
+	    if (shouldInvoke(time)) {
+	      return trailingEdge(time);
+	    } // Restart the timer.
 
-	    // enter
-	    var saveSectionEnter = saveSection.enter()
-	      .append('div')
-	        .attr('class', 'qa-save save-section cf');
 
-	    // update
-	    saveSection = saveSectionEnter
-	      .merge(saveSection)
-	        .call(qaSaveButtons);
+	    timerId = setTimeout(timerExpired, remainingWait(time));
 	  }
 
-	  function qaSaveButtons(selection) {
-	    var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-	    var buttonSection = selection.selectAll('.buttons')
-	      .data((isSelected ? [_qaItem] : []), function (d) { return d.status + d.id; });
-
-	    // exit
-	    buttonSection.exit()
-	      .remove();
-
-	    // enter
-	    var buttonEnter = buttonSection.enter()
-	      .append('div')
-	        .attr('class', 'buttons');
-
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button close-button action');
+	  function trailingEdge(time) {
+	    timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
+	    // debounced at least once.
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button ignore-button action');
+	    if (trailing && lastArgs) {
+	      return invokeFunc(time);
+	    }
 
-	    // update
-	    buttonSection = buttonSection
-	      .merge(buttonEnter);
+	    lastArgs = lastThis = undefined;
+	    return result;
+	  }
 
-	    buttonSection.select('.close-button')
-	      .text(function () { return _t('QA.keepRight.close'); })
-	      .on('click.close', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.osmose;
-	        if (qaService) {
-	          d.newStatus = 'done';
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	  function cancel() {
+	    if (timerId !== undefined) {
+	      clearTimeout(timerId);
+	    }
 
-	    buttonSection.select('.ignore-button')
-	      .text(function () { return _t('QA.keepRight.ignore'); })
-	      .on('click.ignore', function(d) {
-	        this.blur();    // avoid keeping focus on the button - #4641
-	        var qaService = services.osmose;
-	        if (qaService) {
-	          d.newStatus = 'false';
-	          qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-	        }
-	      });
+	    lastInvokeTime = 0;
+	    lastArgs = lastCallTime = lastThis = timerId = undefined;
 	  }
 
-	  // NOTE: Don't change method name until UI v3 is merged
-	  osmoseEditor.error = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return osmoseEditor;
-	  };
+	  function flush() {
+	    return timerId === undefined ? result : trailingEdge(now$1());
+	  }
 
-	  return utilRebind(osmoseEditor, dispatch$1, 'on');
-	}
+	  function debounced() {
+	    var time = now$1(),
+	        isInvoking = shouldInvoke(time);
+	    lastArgs = arguments;
+	    lastThis = this;
+	    lastCallTime = time;
 
-	// NOTE: Don't change name of this until UI v3 is merged
-	function modeSelectError(context, selectedErrorID, selectedErrorService) {
-	    var mode = {
-	        id: 'select-error',
-	        button: 'browse'
-	    };
+	    if (isInvoking) {
+	      if (timerId === undefined) {
+	        return leadingEdge(lastCallTime);
+	      }
 
-	    var keybinding = utilKeybinding('select-error');
-
-	    var errorService = services[selectedErrorService];
-	    var errorEditor;
-	    switch (selectedErrorService) {
-	        case 'improveOSM':
-	            errorEditor = uiImproveOsmEditor(context)
-	            .on('change', function() {
-	                context.map().pan([0,0]);  // trigger a redraw
-	                var error = checkSelectedID();
-	                if (!error) { return; }
-	                context.ui().sidebar
-	                    .show(errorEditor.error(error));
-	            });
-	            break;
-	        case 'keepRight':
-	            errorEditor = uiKeepRightEditor(context)
-	            .on('change', function() {
-	                context.map().pan([0,0]);  // trigger a redraw
-	                var error = checkSelectedID();
-	                if (!error) { return; }
-	                context.ui().sidebar
-	                    .show(errorEditor.error(error));
-	            });
-	            break;
-	        case 'osmose':
-	            errorEditor = uiOsmoseEditor(context)
-	            .on('change', function() {
-	                context.map().pan([0,0]);  // trigger a redraw
-	                var error = checkSelectedID();
-	                if (!error) { return; }
-	                context.ui().sidebar
-	                    .show(errorEditor.error(error));
-	            });
-	            break;
+	      if (maxing) {
+	        // Handle invocations in a tight loop.
+	        clearTimeout(timerId);
+	        timerId = setTimeout(timerExpired, wait);
+	        return invokeFunc(lastCallTime);
+	      }
 	    }
 
-
-	    var behaviors = [
-	        behaviorBreathe(),
-	        behaviorHover(context),
-	        behaviorSelect(context),
-	        behaviorLasso(context),
-	        modeDragNode(context).behavior,
-	        modeDragNote(context).behavior
-	    ];
-
-
-	    function checkSelectedID() {
-	        if (!errorService) { return; }
-	        var error = errorService.getError(selectedErrorID);
-	        if (!error) {
-	            context.enter(modeBrowse(context));
-	        }
-	        return error;
+	    if (timerId === undefined) {
+	      timerId = setTimeout(timerExpired, wait);
 	    }
 
+	    return result;
+	  }
 
-	    mode.zoomToSelected = function() {
-	        if (!errorService) { return; }
-	        var error = errorService.getError(selectedErrorID);
-	        if (error) {
-	            context.map().centerZoomEase(error.loc, 20);
-	        }
-	    };
+	  debounced.cancel = cancel;
+	  debounced.flush = flush;
+	  return debounced;
+	}
 
+	/** Error message constants. */
 
-	    mode.enter = function() {
-	        var error = checkSelectedID();
-	        if (!error) { return; }
+	var FUNC_ERROR_TEXT$1 = 'Expected a function';
+	/**
+	 * Creates a throttled function that only invokes `func` at most once per
+	 * every `wait` milliseconds. The throttled function comes with a `cancel`
+	 * method to cancel delayed `func` invocations and a `flush` method to
+	 * immediately invoke them. Provide `options` to indicate whether `func`
+	 * should be invoked on the leading and/or trailing edge of the `wait`
+	 * timeout. The `func` is invoked with the last arguments provided to the
+	 * throttled function. Subsequent calls to the throttled function return the
+	 * result of the last `func` invocation.
+	 *
+	 * **Note:** If `leading` and `trailing` options are `true`, `func` is
+	 * invoked on the trailing edge of the timeout only if the throttled function
+	 * is invoked more than once during the `wait` timeout.
+	 *
+	 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+	 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+	 *
+	 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+	 * for details over the differences between `_.throttle` and `_.debounce`.
+	 *
+	 * @static
+	 * @memberOf _
+	 * @since 0.1.0
+	 * @category Function
+	 * @param {Function} func The function to throttle.
+	 * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
+	 * @param {Object} [options={}] The options object.
+	 * @param {boolean} [options.leading=true]
+	 *  Specify invoking on the leading edge of the timeout.
+	 * @param {boolean} [options.trailing=true]
+	 *  Specify invoking on the trailing edge of the timeout.
+	 * @returns {Function} Returns the new throttled function.
+	 * @example
+	 *
+	 * // Avoid excessively updating the position while scrolling.
+	 * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
+	 *
+	 * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
+	 * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
+	 * jQuery(element).on('click', throttled);
+	 *
+	 * // Cancel the trailing throttled invocation.
+	 * jQuery(window).on('popstate', throttled.cancel);
+	 */
 
-	        behaviors.forEach(context.install);
-	        keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on('⎋', esc, true);
+	function throttle(func, wait, options) {
+	  var leading = true,
+	      trailing = true;
 
-	        select(document)
-	            .call(keybinding);
+	  if (typeof func != 'function') {
+	    throw new TypeError(FUNC_ERROR_TEXT$1);
+	  }
 
-	        selectError();
+	  if (isObject$1(options)) {
+	    leading = 'leading' in options ? !!options.leading : leading;
+	    trailing = 'trailing' in options ? !!options.trailing : trailing;
+	  }
 
-	        var sidebar = context.ui().sidebar;
-	        sidebar.show(errorEditor.error(error));
+	  return debounce(func, wait, {
+	    'leading': leading,
+	    'maxWait': wait,
+	    'trailing': trailing
+	  });
+	}
 
-	        context.map()
-	            .on('drawn.select-error', selectError);
+	var hashes = createCommonjsModule(function (module, exports) {
+	  /**
+	   * jshashes - https://github.com/h2non/jshashes
+	   * Released under the "New BSD" license
+	   *
+	   * Algorithms specification:
+	   *
+	   * MD5 - http://www.ietf.org/rfc/rfc1321.txt
+	   * RIPEMD-160 - http://homes.esat.kuleuven.be/~bosselae/ripemd160.html
+	   * SHA1   - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
+	   * SHA256 - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
+	   * SHA512 - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
+	   * HMAC - http://www.ietf.org/rfc/rfc2104.txt
+	   */
+	  (function () {
+	    var Hashes;
 
+	    function utf8Encode(str) {
+	      var x,
+	          y,
+	          output = '',
+	          i = -1,
+	          l;
 
-	        // class the error as selected, or return to browse mode if the error is gone
-	        function selectError(drawn) {
-	            if (!checkSelectedID()) { return; }
+	      if (str && str.length) {
+	        l = str.length;
 
-	            var selection = context.surface()
-	                .selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
+	        while ((i += 1) < l) {
+	          /* Decode utf-16 surrogate pairs */
+	          x = str.charCodeAt(i);
+	          y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
 
-	            if (selection.empty()) {
-	                // Return to browse mode if selected DOM elements have
-	                // disappeared because the user moved them out of view..
-	                var source = event && event.type === 'zoom' && event.sourceEvent;
-	                if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-	                    context.enter(modeBrowse(context));
-	                }
+	          if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
+	            x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
+	            i += 1;
+	          }
+	          /* Encode output as utf-8 */
 
-	            } else {
-	                selection
-	                    .classed('selected', true);
 
-	                context.selectedErrorID(selectedErrorID);
-	            }
+	          if (x <= 0x7F) {
+	            output += String.fromCharCode(x);
+	          } else if (x <= 0x7FF) {
+	            output += String.fromCharCode(0xC0 | x >>> 6 & 0x1F, 0x80 | x & 0x3F);
+	          } else if (x <= 0xFFFF) {
+	            output += String.fromCharCode(0xE0 | x >>> 12 & 0x0F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
+	          } else if (x <= 0x1FFFFF) {
+	            output += String.fromCharCode(0xF0 | x >>> 18 & 0x07, 0x80 | x >>> 12 & 0x3F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
+	          }
 	        }
+	      }
 
-	        function esc() {
-	            if (context.container().select('.combobox').size()) { return; }
-	            context.enter(modeBrowse(context));
-	        }
-	    };
+	      return output;
+	    }
 
+	    function utf8Decode(str) {
+	      var i,
+	          ac,
+	          c1,
+	          c2,
+	          c3,
+	          arr = [],
+	          l;
+	      i = ac = c1 = c2 = c3 = 0;
 
-	    mode.exit = function() {
-	        behaviors.forEach(context.uninstall);
+	      if (str && str.length) {
+	        l = str.length;
+	        str += '';
 
-	        select(document)
-	            .call(keybinding.unbind);
+	        while (i < l) {
+	          c1 = str.charCodeAt(i);
+	          ac += 1;
 
-	        context.surface()
-	            .selectAll('.qaItem.selected')
-	            .classed('selected hover', false);
+	          if (c1 < 128) {
+	            arr[ac] = String.fromCharCode(c1);
+	            i += 1;
+	          } else if (c1 > 191 && c1 < 224) {
+	            c2 = str.charCodeAt(i + 1);
+	            arr[ac] = String.fromCharCode((c1 & 31) << 6 | c2 & 63);
+	            i += 2;
+	          } else {
+	            c2 = str.charCodeAt(i + 1);
+	            c3 = str.charCodeAt(i + 2);
+	            arr[ac] = String.fromCharCode((c1 & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
+	            i += 3;
+	          }
+	        }
+	      }
+
+	      return arr.join('');
+	    }
+	    /**
+	     * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+	     * to work around bugs in some JS interpreters.
+	     */
 
-	        context.map()
-	            .on('drawn.select-error', null);
 
-	        context.ui().sidebar
-	            .hide();
+	    function safe_add(x, y) {
+	      var lsw = (x & 0xFFFF) + (y & 0xFFFF),
+	          msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+	      return msw << 16 | lsw & 0xFFFF;
+	    }
+	    /**
+	     * Bitwise rotate a 32-bit number to the left.
+	     */
 
-	        context.selectedErrorID(null);
-	        context.features().forceVisible([]);
-	    };
 
+	    function bit_rol(num, cnt) {
+	      return num << cnt | num >>> 32 - cnt;
+	    }
+	    /**
+	     * Convert a raw string to a hex string
+	     */
 
-	    return mode;
-	}
 
-	function behaviorSelect(context) {
-	    var _tolerancePx = 4; // see also behaviorDrag
-	    var _lastMouseEvent = null;
-	    var _showMenu = false;
-	    var _downPointers = {};
-	    var _longPressTimeout = null;
-	    var _lastInteractionType = null;
-	    // the id of the down pointer that's enabling multiselection while down
-	    var _multiselectionPointerId = null;
+	    function rstr2hex(input, hexcase) {
+	      var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
+	          output = '',
+	          x,
+	          i = 0,
+	          l = input.length;
 
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	      for (; i < l; i += 1) {
+	        x = input.charCodeAt(i);
+	        output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
+	      }
 
+	      return output;
+	    }
+	    /**
+	     * Convert an array of big-endian words to a string
+	     */
 
-	    function keydown() {
 
-	        if (event.keyCode === 32) {
-	            // don't react to spacebar events during text input
-	            var activeNode = document.activeElement;
-	            if (activeNode && new Set(['INPUT', 'TEXTAREA']).has(activeNode.nodeName)) { return; }
-	        }
+	    function binb2rstr(input) {
+	      var i,
+	          l = input.length * 32,
+	          output = '';
 
-	        if (event.keyCode === 93 ||  // context menu key
-	            event.keyCode === 32) {  // spacebar
-	            event.preventDefault();
-	        }
+	      for (i = 0; i < l; i += 8) {
+	        output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
+	      }
 
-	        if (event.repeat) { return; } // ignore repeated events for held keys
+	      return output;
+	    }
+	    /**
+	     * Convert an array of little-endian words to a string
+	     */
 
-	        // if any key is pressed the user is probably doing something other than long-pressing
-	        cancelLongPress();
 
-	        if (event.shiftKey) {
-	            context.surface()
-	                .classed('behavior-multiselect', true);
-	        }
+	    function binl2rstr(input) {
+	      var i,
+	          l = input.length * 32,
+	          output = '';
 
-	        if (event.keyCode === 32) {  // spacebar
-	            if (!_downPointers.spacebar && _lastMouseEvent) {
-	                cancelLongPress();
-	                _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
+	      for (i = 0; i < l; i += 8) {
+	        output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+	      }
 
-	                _downPointers.spacebar = {
-	                    firstEvent: _lastMouseEvent,
-	                    lastEvent: _lastMouseEvent
-	                };
-	            }
-	        }
+	      return output;
 	    }
+	    /**
+	     * Convert a raw string to an array of little-endian words
+	     * Characters >255 have their high-byte silently ignored.
+	     */
 
 
-	    function keyup() {
-	        cancelLongPress();
-
-	        if (!event.shiftKey) {
-	            context.surface()
-	                .classed('behavior-multiselect', false);
-	        }
+	    function rstr2binl(input) {
+	      var i,
+	          l = input.length * 8,
+	          output = Array(input.length >> 2),
+	          lo = output.length;
 
-	        if (event.keyCode === 93) {  // context menu key
-	            event.preventDefault();
-	            _lastInteractionType = 'menukey';
-	            contextmenu();
-	        } else if (event.keyCode === 32) {  // spacebar
-	            var pointer = _downPointers.spacebar;
-	            if (pointer) {
-	                delete _downPointers.spacebar;
+	      for (i = 0; i < lo; i += 1) {
+	        output[i] = 0;
+	      }
 
-	                if (pointer.done) { return; }
+	      for (i = 0; i < l; i += 8) {
+	        output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
+	      }
 
-	                event.preventDefault();
-	                _lastInteractionType = 'spacebar';
-	                click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
-	            }
-	        }
+	      return output;
 	    }
+	    /**
+	     * Convert a raw string to an array of big-endian words
+	     * Characters >255 have their high-byte silently ignored.
+	     */
 
 
-	    function pointerdown() {
-	        var id = (event.pointerId || 'mouse').toString();
-
-	        cancelLongPress();
-
-	        if (event.buttons && event.buttons !== 1) { return; }
+	    function rstr2binb(input) {
+	      var i,
+	          l = input.length * 8,
+	          output = Array(input.length >> 2),
+	          lo = output.length;
 
-	        context.ui().closeEditMenu();
+	      for (i = 0; i < lo; i += 1) {
+	        output[i] = 0;
+	      }
 
-	        _longPressTimeout = window.setTimeout(didLongPress, 500, id, 'longdown-' + (event.pointerType || 'mouse'));
+	      for (i = 0; i < l; i += 8) {
+	        output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
+	      }
 
-	        _downPointers[id] = {
-	            firstEvent: event,
-	            lastEvent: event
-	        };
+	      return output;
 	    }
+	    /**
+	     * Convert a raw string to an arbitrary string encoding
+	     */
 
 
-	    function didLongPress(id, interactionType) {
-	        var pointer = _downPointers[id];
-	        if (!pointer) { return; }
-
-	        for (var i in _downPointers) {
-	            // don't allow this or any currently down pointer to trigger another click
-	            _downPointers[i].done = true;
-	        }
+	    function rstr2any(input, encoding) {
+	      var divisor = encoding.length,
+	          remainders = Array(),
+	          i,
+	          q,
+	          x,
+	          ld,
+	          quotient,
+	          dividend,
+	          output,
+	          full_length;
+	      /* Convert to an array of 16-bit big-endian values, forming the dividend */
+
+	      dividend = Array(Math.ceil(input.length / 2));
+	      ld = dividend.length;
+
+	      for (i = 0; i < ld; i += 1) {
+	        dividend[i] = input.charCodeAt(i * 2) << 8 | input.charCodeAt(i * 2 + 1);
+	      }
+	      /**
+	       * Repeatedly perform a long division. The binary array forms the dividend,
+	       * the length of the encoding is the divisor. Once computed, the quotient
+	       * forms the dividend for the next step. We stop when the dividend is zerHashes.
+	       * All remainders are stored for later use.
+	       */
 
-	        // treat long presses like right-clicks
-	        _longPressTimeout = null;
-	        _lastInteractionType = interactionType;
-	        _showMenu = true;
 
-	        click(pointer.firstEvent, pointer.lastEvent, id);
-	    }
+	      while (dividend.length > 0) {
+	        quotient = Array();
+	        x = 0;
 
+	        for (i = 0; i < dividend.length; i += 1) {
+	          x = (x << 16) + dividend[i];
+	          q = Math.floor(x / divisor);
+	          x -= q * divisor;
 
-	    function pointermove() {
-	        var id = (event.pointerId || 'mouse').toString();
-	        if (_downPointers[id]) {
-	            _downPointers[id].lastEvent = event;
-	        }
-	        if (!event.pointerType || event.pointerType === 'mouse') {
-	            _lastMouseEvent = event;
-	            if (_downPointers.spacebar) {
-	                _downPointers.spacebar.lastEvent = event;
-	            }
+	          if (quotient.length > 0 || q > 0) {
+	            quotient[quotient.length] = q;
+	          }
 	        }
-	    }
 
+	        remainders[remainders.length] = x;
+	        dividend = quotient;
+	      }
+	      /* Convert the remainders to the output string */
 
-	    function pointerup() {
-	        var id = (event.pointerId || 'mouse').toString();
-	        var pointer = _downPointers[id];
-	        if (!pointer) { return; }
 
-	        delete _downPointers[id];
+	      output = '';
 
-	        if (_multiselectionPointerId === id) {
-	            _multiselectionPointerId = null;
-	        }
+	      for (i = remainders.length - 1; i >= 0; i--) {
+	        output += encoding.charAt(remainders[i]);
+	      }
+	      /* Append leading zero equivalents */
 
-	        if (pointer.done) { return; }
 
-	        click(pointer.firstEvent, event, id);
-	    }
+	      full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
 
+	      for (i = output.length; i < full_length; i += 1) {
+	        output = encoding[0] + output;
+	      }
 
-	    function pointercancel() {
-	        var id = (event.pointerId || 'mouse').toString();
-	        if (!_downPointers[id]) { return; }
+	      return output;
+	    }
+	    /**
+	     * Convert a raw string to a base-64 string
+	     */
 
-	        delete _downPointers[id];
 
-	        if (_multiselectionPointerId === id) {
-	            _multiselectionPointerId = null;
+	    function rstr2b64(input, b64pad) {
+	      var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+	          output = '',
+	          len = input.length,
+	          i,
+	          j,
+	          triplet;
+	      b64pad = b64pad || '=';
+
+	      for (i = 0; i < len; i += 3) {
+	        triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
+
+	        for (j = 0; j < 4; j += 1) {
+	          if (i * 8 + j * 6 > input.length * 8) {
+	            output += b64pad;
+	          } else {
+	            output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
+	          }
 	        }
+	      }
+
+	      return output;
 	    }
 
+	    Hashes = {
+	      /**
+	       * @property {String} version
+	       * @readonly
+	       */
+	      VERSION: '1.0.6',
 
-	    function contextmenu() {
-	        var e = event;
-	        e.preventDefault();
+	      /**
+	       * @member Hashes
+	       * @class Base64
+	       * @constructor
+	       */
+	      Base64: function Base64() {
+	        // private properties
+	        var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+	            pad = '=',
+	            // URL encoding support @todo
+	        utf8 = true; // by default enable UTF-8 support encoding
+	        // public method for encoding
+
+	        this.encode = function (input) {
+	          var i,
+	              j,
+	              triplet,
+	              output = '',
+	              len = input.length;
+	          pad = pad || '=';
+	          input = utf8 ? utf8Encode(input) : input;
+
+	          for (i = 0; i < len; i += 3) {
+	            triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
+
+	            for (j = 0; j < 4; j += 1) {
+	              if (i * 8 + j * 6 > len * 8) {
+	                output += pad;
+	              } else {
+	                output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
+	              }
+	            }
+	          }
+
+	          return output;
+	        }; // public method for decoding
+
+
+	        this.decode = function (input) {
+	          // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+	          var i,
+	              o1,
+	              o2,
+	              o3,
+	              h1,
+	              h2,
+	              h3,
+	              h4,
+	              bits,
+	              ac,
+	              dec = '',
+	              arr = [];
+
+	          if (!input) {
+	            return input;
+	          }
 
-	        if (!+e.clientX && !+e.clientY) {
-	            if (_lastMouseEvent) {
-	                e.sourceEvent = _lastMouseEvent;
+	          i = ac = 0;
+	          input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
+	          //input += '';
+
+	          do {
+	            // unpack four hexets into three octets using index points in b64
+	            h1 = tab.indexOf(input.charAt(i += 1));
+	            h2 = tab.indexOf(input.charAt(i += 1));
+	            h3 = tab.indexOf(input.charAt(i += 1));
+	            h4 = tab.indexOf(input.charAt(i += 1));
+	            bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
+	            o1 = bits >> 16 & 0xff;
+	            o2 = bits >> 8 & 0xff;
+	            o3 = bits & 0xff;
+	            ac += 1;
+
+	            if (h3 === 64) {
+	              arr[ac] = String.fromCharCode(o1);
+	            } else if (h4 === 64) {
+	              arr[ac] = String.fromCharCode(o1, o2);
 	            } else {
-	                return;
+	              arr[ac] = String.fromCharCode(o1, o2, o3);
 	            }
-	        } else {
-	            _lastMouseEvent = event;
-	            _lastInteractionType = 'rightclick';
-	        }
+	          } while (i < input.length);
 
-	        _showMenu = true;
-	        click(event, event);
-	    }
+	          dec = arr.join('');
+	          dec = utf8 ? utf8Decode(dec) : dec;
+	          return dec;
+	        }; // set custom pad string
 
 
-	    function click(firstEvent, lastEvent, pointerId) {
-	        cancelLongPress();
+	        this.setPad = function (str) {
+	          pad = str || pad;
+	          return this;
+	        }; // set custom tab string characters
 
-	        var mapNode = context.container().select('.main-map').node();
 
-	        // Use the `main-map` coordinate system since the surface and supersurface
-	        // are transformed when drag-panning.
-	        var pointGetter = utilFastMouse(mapNode);
-	        var p1 = pointGetter(firstEvent);
-	        var p2 = pointGetter(lastEvent);
-	        var dist = geoVecLength(p1, p2);
+	        this.setTab = function (str) {
+	          tab = str || tab;
+	          return this;
+	        };
 
-	        if (dist > _tolerancePx ||
-	            !mapContains(lastEvent)) {
+	        this.setUTF8 = function (bool) {
+	          if (typeof bool === 'boolean') {
+	            utf8 = bool;
+	          }
 
-	            resetProperties();
-	            return;
-	        }
+	          return this;
+	        };
+	      },
 
-	        var targetDatum = lastEvent.target.__data__;
+	      /**
+	       * CRC-32 calculation
+	       * @member Hashes
+	       * @method CRC32
+	       * @static
+	       * @param {String} str Input String
+	       * @return {String}
+	       */
+	      CRC32: function CRC32(str) {
+	        var crc = 0,
+	            x = 0,
+	            y = 0,
+	            table,
+	            i,
+	            iTop;
+	        str = utf8Encode(str);
+	        table = ['00000000 77073096 EE0E612C 990951BA 076DC419 706AF48F E963A535 9E6495A3 0EDB8832 ', '79DCB8A4 E0D5E91E 97D2D988 09B64C2B 7EB17CBD E7B82D07 90BF1D91 1DB71064 6AB020F2 F3B97148 ', '84BE41DE 1ADAD47D 6DDDE4EB F4D4B551 83D385C7 136C9856 646BA8C0 FD62F97A 8A65C9EC 14015C4F ', '63066CD9 FA0F3D63 8D080DF5 3B6E20C8 4C69105E D56041E4 A2677172 3C03E4D1 4B04D447 D20D85FD ', 'A50AB56B 35B5A8FA 42B2986C DBBBC9D6 ACBCF940 32D86CE3 45DF5C75 DCD60DCF ABD13D59 26D930AC ', '51DE003A C8D75180 BFD06116 21B4F4B5 56B3C423 CFBA9599 B8BDA50F 2802B89E 5F058808 C60CD9B2 ', 'B10BE924 2F6F7C87 58684C11 C1611DAB B6662D3D 76DC4190 01DB7106 98D220BC EFD5102A 71B18589 ', '06B6B51F 9FBFE4A5 E8B8D433 7807C9A2 0F00F934 9609A88E E10E9818 7F6A0DBB 086D3D2D 91646C97 ', 'E6635C01 6B6B51F4 1C6C6162 856530D8 F262004E 6C0695ED 1B01A57B 8208F4C1 F50FC457 65B0D9C6 ', '12B7E950 8BBEB8EA FCB9887C 62DD1DDF 15DA2D49 8CD37CF3 FBD44C65 4DB26158 3AB551CE A3BC0074 ', 'D4BB30E2 4ADFA541 3DD895D7 A4D1C46D D3D6F4FB 4369E96A 346ED9FC AD678846 DA60B8D0 44042D73 ', '33031DE5 AA0A4C5F DD0D7CC9 5005713C 270241AA BE0B1010 C90C2086 5768B525 206F85B3 B966D409 ', 'CE61E49F 5EDEF90E 29D9C998 B0D09822 C7D7A8B4 59B33D17 2EB40D81 B7BD5C3B C0BA6CAD EDB88320 ', '9ABFB3B6 03B6E20C 74B1D29A EAD54739 9DD277AF 04DB2615 73DC1683 E3630B12 94643B84 0D6D6A3E ', '7A6A5AA8 E40ECF0B 9309FF9D 0A00AE27 7D079EB1 F00F9344 8708A3D2 1E01F268 6906C2FE F762575D ', '806567CB 196C3671 6E6B06E7 FED41B76 89D32BE0 10DA7A5A 67DD4ACC F9B9DF6F 8EBEEFF9 17B7BE43 ', '60B08ED5 D6D6A3E8 A1D1937E 38D8C2C4 4FDFF252 D1BB67F1 A6BC5767 3FB506DD 48B2364B D80D2BDA ', 'AF0A1B4C 36034AF6 41047A60 DF60EFC3 A867DF55 316E8EEF 4669BE79 CB61B38C BC66831A 256FD2A0 ', '5268E236 CC0C7795 BB0B4703 220216B9 5505262F C5BA3BBE B2BD0B28 2BB45A92 5CB36A04 C2D7FFA7 ', 'B5D0CF31 2CD99E8B 5BDEAE1D 9B64C2B0 EC63F226 756AA39C 026D930A 9C0906A9 EB0E363F 72076785 ', '05005713 95BF4A82 E2B87A14 7BB12BAE 0CB61B38 92D28E9B E5D5BE0D 7CDCEFB7 0BDBDF21 86D3D2D4 ', 'F1D4E242 68DDB3F8 1FDA836E 81BE16CD F6B9265B 6FB077E1 18B74777 88085AE6 FF0F6A70 66063BCA ', '11010B5C 8F659EFF F862AE69 616BFFD3 166CCF45 A00AE278 D70DD2EE 4E048354 3903B3C2 A7672661 ', 'D06016F7 4969474D 3E6E77DB AED16A4A D9D65ADC 40DF0B66 37D83BF0 A9BCAE53 DEBB9EC5 47B2CF7F ', '30B5FFE9 BDBDF21C CABAC28A 53B39330 24B4A3A6 BAD03605 CDD70693 54DE5729 23D967BF B3667A2E ', 'C4614AB8 5D681B02 2A6F2B94 B40BBE37 C30C8EA1 5A05DF1B 2D02EF8D'].join('');
+	        crc = crc ^ -1;
+
+	        for (i = 0, iTop = str.length; i < iTop; i += 1) {
+	          y = (crc ^ str.charCodeAt(i)) & 0xFF;
+	          x = '0x' + table.substr(y * 9, 8);
+	          crc = crc >>> 8 ^ x;
+	        } // always return a positive number (that's what >>> 0 does)
+
+
+	        return (crc ^ -1) >>> 0;
+	      },
 
-	        var multiselectEntityId;
+	      /**
+	       * @member Hashes
+	       * @class MD5
+	       * @constructor
+	       * @param {Object} [config]
+	       *
+	       * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+	       * Digest Algorithm, as defined in RFC 1321.
+	       * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See <http://pajhome.org.uk/crypt/md5> for more infHashes.
+	       */
+	      MD5: function MD5(options) {
+	        /**
+	         * Private config properties. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
+	         */
+	        var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+	            // hexadecimal output case format. false - lowercase; true - uppercase
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+	            // base-64 pad character. Defaults to '=' for strict RFC compliance
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
+	        // privileged (public) methods
+
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s), hexcase);
+	        };
 
-	        if (!_multiselectionPointerId) {
-	            // If a different pointer than the one triggering this click is down on a
-	            // feature, treat this and all future clicks as multiselection until that
-	            // pointer is raised.
-	            var selectPointerInfo = pointerDownOnSelection(pointerId);
-	            if (selectPointerInfo) {
-	                _multiselectionPointerId = selectPointerInfo.pointerId;
-	                // if the other feature isn't selected yet, make sure we select it
-	                multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
-	                _downPointers[selectPointerInfo.pointerId].done = true;
-	            }
-	        }
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	        // support multiselect if data is already selected
-	        var isMultiselect = context.mode().id === 'select' && (
-	            // and shift key is down
-	            (event && event.shiftKey) ||
-	            // or we're lasso-selecting
-	            context.surface().select('.lasso').node() ||
-	            // or a pointer is down over a selected feature
-	            (_multiselectionPointerId && !multiselectEntityId)
-	        );
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	        processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	        function mapContains(event) {
-	            var rect = mapNode.getBoundingClientRect();
-	            return event.clientX >= rect.left &&
-	                event.clientX <= rect.right &&
-	                event.clientY >= rect.top &&
-	                event.clientY <= rect.bottom;
-	        }
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d), hexcase);
+	        };
 
-	        function pointerDownOnSelection(skipPointerId) {
-	            var mode = context.mode();
-	            var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
-	            for (var pointerId in _downPointers) {
-	                if (pointerId === 'spacebar' || pointerId === skipPointerId) { continue; }
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	                var pointerInfo = _downPointers[pointerId];
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         */
 
-	                var p1 = pointGetter(pointerInfo.firstEvent);
-	                var p2 = pointGetter(pointerInfo.lastEvent);
-	                if (geoVecLength(p1, p2) > _tolerancePx) { continue; }
 
-	                var datum = pointerInfo.firstEvent.target.__data__;
-	                var entity = (datum && datum.properties && datum.properties.entity) || datum;
-	                if (context.graph().hasEntity(entity.id)) { return {
-	                    pointerId: pointerId,
-	                    entityId: entity.id,
-	                    selected: selectedIDs.indexOf(entity.id) !== -1
-	                }; }
-	            }
-	            return null;
-	        }
-	    }
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * Enable/disable uppercase hexadecimal returned string
+	         * @param {Boolean}
+	         * @return {Object} this
+	         */
 
 
-	    function processClick(datum, isMultiselect, point, alsoSelectId) {
-	        var mode = context.mode();
-	        var showMenu = _showMenu;
-	        var interactionType = _lastInteractionType;
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	        var entity = datum && datum.properties && datum.properties.entity;
-	        if (entity) { datum = entity; }
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {String} Pad
+	         * @return {Object} this
+	         */
 
-	        if (datum && datum.type === 'midpoint') {
-	            // treat targeting midpoints as if targeting the parent way
-	            datum = datum.parents[0];
-	        }
 
-	        var newMode;
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {Boolean}
+	         * @return {Object} [this]
+	         */
 
-	        if (datum instanceof osmEntity) {
-	            // targeting an entity
-	            var selectedIDs = context.selectedIDs();
-	            context.selectedNoteID(null);
-	            context.selectedErrorID(null);
-
-	            if (!isMultiselect) {
-	                // don't change the selection if we're toggling the menu atop a multiselection
-	                if (!showMenu ||
-	                    selectedIDs.length <= 1 ||
-	                    selectedIDs.indexOf(datum.id) === -1) {
-
-	                    if (alsoSelectId === datum.id) { alsoSelectId = null; }
-
-	                    selectedIDs = (alsoSelectId ? [alsoSelectId] : []).concat([datum.id]);
-	                    // always enter modeSelect even if the entity is already
-	                    // selected since listeners may expect `context.enter` events,
-	                    // e.g. in the walkthrough
-	                    newMode = mode.id === 'select' ? mode.selectedIDs(selectedIDs) : modeSelect(context, selectedIDs).selectBehavior(behavior);
-	                    context.enter(newMode);
-	                }
 
-	            } else {
-	                if (selectedIDs.indexOf(datum.id) !== -1) {
-	                    // clicked entity is already in the selectedIDs list..
-	                    if (!showMenu) {
-	                        // deselect clicked entity, then reenter select mode or return to browse mode..
-	                        selectedIDs = selectedIDs.filter(function(id) { return id !== datum.id; });
-	                        newMode = selectedIDs.length ? mode.selectedIDs(selectedIDs) : modeBrowse(context).selectBehavior(behavior);
-	                        context.enter(newMode);
-	                    }
-	                } else {
-	                    // clicked entity is not in the selected list, add it..
-	                    selectedIDs = selectedIDs.concat([datum.id]);
-	                    newMode = mode.selectedIDs(selectedIDs);
-	                    context.enter(newMode);
-	                }
-	            }
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	        } else if (datum && datum.__featurehash__ && !isMultiselect) {
-	            // targeting custom data
-	            context
-	                .selectedNoteID(null)
-	                .enter(modeSelectData(context, datum));
+	          return this;
+	        }; // private methods
 
-	        } else if (datum instanceof osmNote && !isMultiselect) {
-	            // targeting a note
-	            context
-	                .selectedNoteID(datum.id)
-	                .enter(modeSelectNote(context, datum.id));
+	        /**
+	         * Calculate the MD5 of a raw string
+	         */
 
-	        } else if (datum instanceof QAItem & !isMultiselect) {
-	            // targeting an external QA issue
-	            context
-	                .selectedErrorID(datum.id)
-	                .enter(modeSelectError(context, datum.id, datum.service));
 
-	        } else {
-	            // targeting nothing
-	            context.selectedNoteID(null);
-	            context.selectedErrorID(null);
-	            if (!isMultiselect && mode.id !== 'browse') {
-	                context.enter(modeBrowse(context));
-	            }
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binl2rstr(binl(rstr2binl(s), s.length * 8));
 	        }
+	        /**
+	         * Calculate the HMAC-MD5, of a key and some data (raw strings)
+	         */
 
-	        context.ui().closeEditMenu();
 
-	        // always request to show the edit menu in case the mode needs it
-	        if (showMenu) { context.ui().showEditMenu(point, interactionType); }
+	        function rstr_hmac(key, data) {
+	          var bkey, ipad, opad, hash, i;
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          bkey = rstr2binl(key);
 
-	        resetProperties();
-	    }
+	          if (bkey.length > 16) {
+	            bkey = binl(bkey, key.length * 8);
+	          }
 
+	          ipad = Array(16), opad = Array(16);
 
-	    function cancelLongPress() {
-	        if (_longPressTimeout) { window.clearTimeout(_longPressTimeout); }
-	        _longPressTimeout = null;
-	    }
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
+	          hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
+	          return binl2rstr(binl(opad.concat(hash), 512 + 128));
+	        }
+	        /**
+	         * Calculate the MD5 of an array of little-endian words, and a bit length.
+	         */
+
+
+	        function binl(x, len) {
+	          var i,
+	              olda,
+	              oldb,
+	              oldc,
+	              oldd,
+	              a = 1732584193,
+	              b = -271733879,
+	              c = -1732584194,
+	              d = 271733878;
+	          /* append padding */
+
+	          x[len >> 5] |= 0x80 << len % 32;
+	          x[(len + 64 >>> 9 << 4) + 14] = len;
+
+	          for (i = 0; i < x.length; i += 16) {
+	            olda = a;
+	            oldb = b;
+	            oldc = c;
+	            oldd = d;
+	            a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
+	            d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
+	            c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
+	            b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
+	            a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
+	            d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
+	            c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
+	            b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
+	            a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
+	            d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
+	            c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
+	            b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
+	            a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
+	            d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
+	            c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
+	            b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
+	            a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
+	            d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
+	            c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
+	            b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
+	            a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
+	            d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
+	            c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
+	            b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
+	            a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
+	            d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
+	            c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
+	            b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
+	            a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
+	            d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
+	            c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
+	            b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
+	            a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
+	            d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
+	            c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
+	            b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
+	            a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
+	            d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
+	            c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
+	            b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
+	            a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
+	            d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
+	            c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
+	            b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
+	            a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
+	            d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
+	            c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
+	            b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
+	            a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
+	            d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
+	            c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
+	            b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
+	            a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
+	            d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
+	            c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
+	            b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
+	            a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
+	            d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
+	            c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
+	            b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
+	            a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
+	            d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
+	            c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
+	            b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
+	            a = safe_add(a, olda);
+	            b = safe_add(b, oldb);
+	            c = safe_add(c, oldc);
+	            d = safe_add(d, oldd);
+	          }
 
-	    function resetProperties() {
-	        cancelLongPress();
-	        _showMenu = false;
-	        _lastInteractionType = null;
-	        // don't reset _lastMouseEvent since it might still be useful
-	    }
-
-
-	    function behavior(selection) {
-	        resetProperties();
-	        _lastMouseEvent = context.map().lastPointerEvent();
-
-	        select(window)
-	            .on('keydown.select', keydown)
-	            .on('keyup.select', keyup)
-	            .on(_pointerPrefix + 'move.select', pointermove, true)
-	            .on(_pointerPrefix + 'up.select', pointerup, true)
-	            .on('pointercancel.select', pointercancel, true)
-	            .on('contextmenu.select-window', function() {
-	                // Edge and IE really like to show the contextmenu on the
-	                // menubar when user presses a keyboard menu button
-	                // even after we've already preventdefaulted the key event.
-	                var e = event;
-	                if (+e.clientX === 0 && +e.clientY === 0) {
-	                    event.preventDefault();
-	                }
-	            });
+	          return Array(a, b, c, d);
+	        }
+	        /**
+	         * These functions implement the four basic operations the algorithm uses.
+	         */
 
-	        selection
-	            .on(_pointerPrefix + 'down.select', pointerdown)
-	            .on('contextmenu.select', contextmenu);
 
-	        if (event && event.shiftKey) {
-	            context.surface()
-	                .classed('behavior-multiselect', true);
+	        function md5_cmn(q, a, b, x, s, t) {
+	          return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
 	        }
-	    }
 
+	        function md5_ff(a, b, c, d, x, s, t) {
+	          return md5_cmn(b & c | ~b & d, a, b, x, s, t);
+	        }
 
-	    behavior.off = function(selection) {
-	        cancelLongPress();
+	        function md5_gg(a, b, c, d, x, s, t) {
+	          return md5_cmn(b & d | c & ~d, a, b, x, s, t);
+	        }
 
-	        select(window)
-	            .on('keydown.select', null)
-	            .on('keyup.select', null)
-	            .on('contextmenu.select-window', null)
-	            .on(_pointerPrefix + 'move.select', null, true)
-	            .on(_pointerPrefix + 'up.select', null, true)
-	            .on('pointercancel.select', null, true);
+	        function md5_hh(a, b, c, d, x, s, t) {
+	          return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+	        }
 
-	        selection
-	            .on(_pointerPrefix + 'down.select', null)
-	            .on('contextmenu.select', null);
+	        function md5_ii(a, b, c, d, x, s, t) {
+	          return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
+	        }
+	      },
 
-	        context.surface()
-	            .classed('behavior-multiselect', false);
-	    };
+	      /**
+	       * @member Hashes
+	       * @class Hashes.SHA1
+	       * @param {Object} [config]
+	       * @constructor
+	       *
+	       * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined in FIPS 180-1
+	       * Version 2.2 Copyright Paul Johnston 2000 - 2009.
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See http://pajhome.org.uk/crypt/md5 for details.
+	       */
+	      SHA1: function SHA1(options) {
+	        /**
+	         * Private config properties. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
+	         */
+	        var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+	            // hexadecimal output case format. false - lowercase; true - uppercase
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+	            // base-64 pad character. Defaults to '=' for strict RFC compliance
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
+	        // public methods
+
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s), hexcase);
+	        };
 
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	    return behavior;
-	}
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	function behaviorDrawWay(context, wayID, mode, startGraph) {
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	    var dispatch$1 = dispatch('rejectedSelfIntersection');
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	    var behavior = behaviorDraw(context);
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	    // Must be set by `drawWay.nodeIndex` before each install of this behavior.
-	    var _nodeIndex;
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         * @public
+	         */
 
-	    var _origWay;
-	    var _wayGeometry;
-	    var _headNodeID;
-	    var _annotation;
 
-	    var _pointerHasMoved = false;
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    // The osmNode to be placed.
-	    // This is temporary and just follows the mouse cursor until an "add" event occurs.
-	    var _drawNode;
 
-	    var _didResolveTempEdit = false;
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	    function createDrawNode(loc) {
-	        // don't make the draw node until we actually need it
-	        _drawNode = osmNode({ loc: loc });
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	        context.pauseChangeDispatch();
-	        context.replace(function actionAddDrawNode(graph) {
-	            // add the draw node to the graph and insert it into the way
-	            var way = graph.entity(wayID);
-	            return graph
-	                .replace(_drawNode)
-	                .replace(way.addNode(_drawNode.id, _nodeIndex));
-	        }, _annotation);
-	        context.resumeChangeDispatch();
 
-	        setActiveElements();
-	    }
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    function removeDrawNode() {
 
-	        context.pauseChangeDispatch();
-	        context.replace(
-	            function actionDeleteDrawNode(graph) {
-	               var way = graph.entity(wayID);
-	               return graph
-	                   .replace(way.removeNode(_drawNode.id))
-	                   .remove(_drawNode);
-	           },
-	            _annotation
-	        );
-	        _drawNode = undefined;
-	        context.resumeChangeDispatch();
-	    }
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
+	          return this;
+	        }; // private methods
 
-	    function keydown() {
-	        if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            if (context.surface().classed('nope')) {
-	                context.surface()
-	                    .classed('nope-suppressed', true);
-	            }
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-disabled', true);
-	        }
-	    }
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
 
-	    function keyup() {
-	        if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-	            if (context.surface().classed('nope-suppressed')) {
-	                context.surface()
-	                    .classed('nope', true);
-	            }
-	            context.surface()
-	                .classed('nope-suppressed', false)
-	                .classed('nope-disabled', false);
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binb2rstr(binb(rstr2binb(s), s.length * 8));
 	        }
-	    }
+	        /**
+	         * Calculate the HMAC-SHA1 of a key and some data (raw strings)
+	         */
 
 
-	    function allowsVertex(d) {
-	        return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-	    }
-
-
-	    // related code
-	    // - `mode/drag_node.js`     `doMove()`
-	    // - `behavior/draw.js`      `click()`
-	    // - `behavior/draw_way.js`  `move()`
-	    function move(datum) {
+	        function rstr_hmac(key, data) {
+	          var bkey, ipad, opad, i, hash;
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          bkey = rstr2binb(key);
 
-	        var loc = context.map().mouseCoordinates();
-
-	        if (!_drawNode) { createDrawNode(loc); }
+	          if (bkey.length > 16) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	        context.surface().classed('nope-disabled', event.altKey);
+	          ipad = Array(16), opad = Array(16);
 
-	        var targetLoc = datum && datum.properties && datum.properties.entity &&
-	            allowsVertex(datum.properties.entity) && datum.properties.entity.loc;
-	        var targetNodes = datum && datum.properties && datum.properties.nodes;
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	        if (targetLoc) {   // snap to node/vertex - a point target with `.loc`
-	            loc = targetLoc;
+	          hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
+	          return binb2rstr(binb(opad.concat(hash), 512 + 160));
+	        }
+	        /**
+	         * Calculate the SHA-1 of an array of big-endian words, and a bit length
+	         */
+
+
+	        function binb(x, len) {
+	          var i,
+	              j,
+	              t,
+	              olda,
+	              oldb,
+	              oldc,
+	              oldd,
+	              olde,
+	              w = Array(80),
+	              a = 1732584193,
+	              b = -271733879,
+	              c = -1732584194,
+	              d = 271733878,
+	              e = -1009589776;
+	          /* append padding */
+
+	          x[len >> 5] |= 0x80 << 24 - len % 32;
+	          x[(len + 64 >> 9 << 4) + 15] = len;
+
+	          for (i = 0; i < x.length; i += 16) {
+	            olda = a;
+	            oldb = b;
+	            oldc = c;
+	            oldd = d;
+	            olde = e;
+
+	            for (j = 0; j < 80; j += 1) {
+	              if (j < 16) {
+	                w[j] = x[i + j];
+	              } else {
+	                w[j] = bit_rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
+	              }
 
-	        } else if (targetNodes) {   // snap to way - a line target with `.nodes`
-	            var choice = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, _drawNode.id);
-	            if (choice) {
-	                loc = choice.loc;
+	              t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w[j]), sha1_kt(j)));
+	              e = d;
+	              d = c;
+	              c = bit_rol(b, 30);
+	              b = a;
+	              a = t;
 	            }
-	        }
-
-	        context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
-	        _drawNode = context.entity(_drawNode.id);
-	        checkGeometry(true /* includeDrawNode */);
-	    }
 
+	            a = safe_add(a, olda);
+	            b = safe_add(b, oldb);
+	            c = safe_add(c, oldc);
+	            d = safe_add(d, oldd);
+	            e = safe_add(e, olde);
+	          }
 
-	    // Check whether this edit causes the geometry to break.
-	    // If so, class the surface with a nope cursor.
-	    // `includeDrawNode` - Only check the relevant line segments if finishing drawing
-	    function checkGeometry(includeDrawNode) {
-	        var nopeDisabled = context.surface().classed('nope-disabled');
-	        var isInvalid = isInvalidGeometry(includeDrawNode);
-
-	        if (nopeDisabled) {
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-suppressed', isInvalid);
-	        } else {
-	            context.surface()
-	                .classed('nope', isInvalid)
-	                .classed('nope-suppressed', false);
+	          return Array(a, b, c, d, e);
 	        }
-	    }
+	        /**
+	         * Perform the appropriate triplet combination function for the current
+	         * iteration
+	         */
 
 
-	    function isInvalidGeometry(includeDrawNode) {
-
-	        var testNode = _drawNode;
+	        function sha1_ft(t, b, c, d) {
+	          if (t < 20) {
+	            return b & c | ~b & d;
+	          }
 
-	        // we only need to test the single way we're drawing
-	        var parentWay = context.graph().entity(wayID);
-	        var nodes = context.graph().childNodes(parentWay).slice();  // shallow copy
+	          if (t < 40) {
+	            return b ^ c ^ d;
+	          }
 
-	        if (includeDrawNode) {
-	            if (parentWay.isClosed()) {
-	                // don't test the last segment for closed ways - #4655
-	                // (still test the first segement)
-	                nodes.pop();
-	            }
-	        } else { // discount the draw node
+	          if (t < 60) {
+	            return b & c | b & d | c & d;
+	          }
 
-	            if (parentWay.isClosed()) {
-	                if (nodes.length < 3) { return false; }
-	                if (_drawNode) { nodes.splice(-2, 1); }
-	                testNode = nodes[nodes.length - 2];
-	            } else {
-	                // there's nothing we need to test if we ignore the draw node on open ways
-	                return false;
-	            }
+	          return b ^ c ^ d;
 	        }
+	        /**
+	         * Determine the appropriate additive constant for the current iteration
+	         */
 
-	        return testNode && geoHasSelfIntersections(nodes, testNode.id);
-	    }
-
-
-	    function undone() {
-
-	        // undoing removed the temp edit
-	        _didResolveTempEdit = true;
-
-	        context.pauseChangeDispatch();
-
-	        var nextMode;
-
-	        if (context.graph() === startGraph) { // we've undone back to the beginning
-	            nextMode = modeSelect(context, [wayID]);
-	        } else {
-	            context.history()
-	                .on('undone.draw', null);
-	            // remove whatever segment was drawn previously
-	            context.undo();
 
-	            if (context.graph() === startGraph) { // we've undone back to the beginning
-	                nextMode = modeSelect(context, [wayID]);
-	            } else {
-	                // continue drawing
-	                nextMode = mode;
-	            }
+	        function sha1_kt(t) {
+	          return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
 	        }
+	      },
 
-	        // clear the redo stack by adding and removing an edit
-	        context.perform(actionNoop());
-	        context.pop(1);
+	      /**
+	       * @class Hashes.SHA256
+	       * @param {config}
+	       *
+	       * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined in FIPS 180-2
+	       * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See http://pajhome.org.uk/crypt/md5 for details.
+	       * Also http://anmar.eu.org/projects/jssha2/
+	       */
+	      SHA256: function SHA256(options) {
+	        /**
+	         * Private properties configuration variables. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * @see this.setUpperCase() method
+	         * @see this.setPad() method
+	         */
+	        var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+	            // hexadecimal output case format. false - lowercase; true - uppercase  */
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
 
-	        context.resumeChangeDispatch();
-	        context.enter(nextMode);
-	    }
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
+	        /* enable/disable utf8 encoding */
+	        sha256_K;
+	        /* privileged (public) methods */
 
-	    function setActiveElements() {
-	        if (!_drawNode) { return; }
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s, utf8));
+	        };
 
-	        context.surface().selectAll('.' + _drawNode.id)
-	            .classed('active', true);
-	    }
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s, utf8), b64pad);
+	        };
 
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s, utf8), e);
+	        };
 
-	    function resetToStartGraph() {
-	        while (context.graph() !== startGraph) {
-	            context.pop();
-	        }
-	    }
+	        this.raw = function (s) {
+	          return rstr(s, utf8);
+	        };
 
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	    var drawWay = function(surface) {
-	        _drawNode = undefined;
-	        _didResolveTempEdit = false;
-	        _origWay = context.entity(wayID);
-	        _headNodeID = typeof _nodeIndex === 'number' ? _origWay.nodes[_nodeIndex] :
-	            (_origWay.isClosed() ? _origWay.nodes[_origWay.nodes.length - 2] : _origWay.nodes[_origWay.nodes.length - 1]);
-	        _wayGeometry = _origWay.geometry(context.graph());
-	        _annotation = _t((_origWay.isDegenerate() ?
-	            'operations.start.annotation.' :
-	            'operations.continue.annotation.') + _wayGeometry
-	        );
-	        _pointerHasMoved = false;
-
-	        // Push an annotated state for undo to return back to.
-	        // We must make sure to replace or remove it later.
-	        context.pauseChangeDispatch();
-	        context.perform(actionNoop(), _annotation);
-	        context.resumeChangeDispatch();
-
-	        behavior.hover()
-	            .initialNodeID(_headNodeID);
-
-	        behavior
-	            .on('move', function() {
-	                _pointerHasMoved = true;
-	                move.apply(this, arguments);
-	            })
-	            .on('down', function() {
-	                move.apply(this, arguments);
-	            })
-	            .on('downcancel', function() {
-	                if (_drawNode) { removeDrawNode(); }
-	            })
-	            .on('click', drawWay.add)
-	            .on('clickWay', drawWay.addWay)
-	            .on('clickNode', drawWay.addNode)
-	            .on('undo', context.undo)
-	            .on('cancel', drawWay.cancel)
-	            .on('finish', drawWay.finish);
-
-	        select(window)
-	            .on('keydown.drawWay', keydown)
-	            .on('keyup.drawWay', keyup);
-
-	        context.map()
-	            .dblclickZoomEnable(false)
-	            .on('drawn.draw', setActiveElements);
-
-	        setActiveElements();
-
-	        surface.call(behavior);
-
-	        context.history()
-	            .on('undone.draw', undone);
-	    };
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         * @public
+	         */
 
-	    drawWay.off = function(surface) {
 
-	        if (!_didResolveTempEdit) {
-	            // Drawing was interrupted unexpectedly.
-	            // This can happen if the user changes modes,
-	            // clicks geolocate button, a hashchange event occurs, etc.
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	            context.pauseChangeDispatch();
-	            resetToStartGraph();
-	            context.resumeChangeDispatch();
-	        }
 
-	        _drawNode = undefined;
-	        _nodeIndex = undefined;
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	        context.map()
-	            .on('drawn.draw', null);
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	        surface.call(behavior.off)
-	            .selectAll('.active')
-	            .classed('active', false);
 
-	        surface
-	            .classed('nope', false)
-	            .classed('nope-suppressed', false)
-	            .classed('nope-disabled', false);
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	        select(window)
-	            .on('keydown.drawWay', null)
-	            .on('keyup.drawWay', null);
 
-	        context.history()
-	            .on('undone.draw', null);
-	    };
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
+	          return this;
+	        }; // private methods
 
-	    function attemptAdd(d, loc, doAdd) {
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
-	        if (_drawNode) {
-	            // move the node to the final loc in case move wasn't called
-	            // consistently (e.g. on touch devices)
-	            context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
-	            _drawNode = context.entity(_drawNode.id);
-	        } else {
-	            createDrawNode(loc);
-	        }
 
-	        checkGeometry(true /* includeDrawNode */);
-	        if ((d && d.properties && d.properties.nope) || context.surface().classed('nope')) {
-	            if (!_pointerHasMoved) {
-	                // prevent the temporary draw node from appearing on touch devices
-	                removeDrawNode();
-	            }
-	            dispatch$1.call('rejectedSelfIntersection', this);
-	            return;   // can't click here
+	        function rstr(s, utf8) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binb2rstr(binb(rstr2binb(s), s.length * 8));
 	        }
-
-	        context.pauseChangeDispatch();
-	        doAdd();
-	        // we just replaced the temporary edit with the real one
-	        _didResolveTempEdit = true;
-	        context.resumeChangeDispatch();
-
-	        context.enter(mode);
-	    }
+	        /**
+	         * Calculate the HMAC-sha256 of a key and some data (raw strings)
+	         */
 
 
-	    // Accept the current position of the drawing node
-	    drawWay.add = function(loc, d) {
-	        attemptAdd(d, loc, function() {
-	            // don't need to do anything extra
-	        });
-	    };
+	        function rstr_hmac(key, data) {
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          var hash,
+	              i = 0,
+	              bkey = rstr2binb(key),
+	              ipad = Array(16),
+	              opad = Array(16);
 
+	          if (bkey.length > 16) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	    // Connect the way to an existing way
-	    drawWay.addWay = function(loc, edge, d) {
-	        attemptAdd(d, loc, function() {
-	            context.replace(
-	                actionAddMidpoint({ loc: loc, edge: edge }, _drawNode),
-	                _annotation
-	            );
-	        });
-	    };
+	          for (; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
+	          hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
+	          return binb2rstr(binb(opad.concat(hash), 512 + 256));
+	        }
+	        /*
+	         * Main sha256 function, with its support functions
+	         */
 
-	    // Connect the way to an existing node
-	    drawWay.addNode = function(node, d) {
 
-	        // finish drawing if the mapper targets the prior node
-	        if (node.id === _headNodeID ||
-	            // or the first node when drawing an area
-	            (_origWay.isClosed() && node.id === _origWay.first())) {
-	            drawWay.finish();
-	            return;
+	        function sha256_S(X, n) {
+	          return X >>> n | X << 32 - n;
 	        }
 
-	        attemptAdd(d, node.loc, function() {
-	            context.replace(
-	                function actionReplaceDrawNode(graph) {
-	                    // remove the temporary draw node and insert the existing node
-	                    // at the same index
+	        function sha256_R(X, n) {
+	          return X >>> n;
+	        }
 
-	                    graph = graph
-	                        .replace(graph.entity(wayID).removeNode(_drawNode.id))
-	                        .remove(_drawNode);
-	                    return graph
-	                        .replace(graph.entity(wayID).addNode(node.id, _nodeIndex));
-	                },
-	                _annotation
-	            );
-	        });
-	    };
+	        function sha256_Ch(x, y, z) {
+	          return x & y ^ ~x & z;
+	        }
 
+	        function sha256_Maj(x, y, z) {
+	          return x & y ^ x & z ^ y & z;
+	        }
 
-	    // Finish the draw operation, removing the temporary edit.
-	    // If the way has enough nodes to be valid, it's selected.
-	    // Otherwise, delete everything and return to browse mode.
-	    drawWay.finish = function() {
-	        checkGeometry(false /* includeDrawNode */);
-	        if (context.surface().classed('nope')) {
-	            dispatch$1.call('rejectedSelfIntersection', this);
-	            return;   // can't click here
+	        function sha256_Sigma0256(x) {
+	          return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
 	        }
 
-	        context.pauseChangeDispatch();
-	        // remove the temporary edit
-	        context.pop(1);
-	        _didResolveTempEdit = true;
-	        context.resumeChangeDispatch();
+	        function sha256_Sigma1256(x) {
+	          return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
+	        }
 
-	        var way = context.hasEntity(wayID);
-	        if (!way || way.isDegenerate()) {
-	            drawWay.cancel();
-	            return;
+	        function sha256_Gamma0256(x) {
+	          return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
 	        }
 
-	        window.setTimeout(function() {
-	            context.map().dblclickZoomEnable(true);
-	        }, 1000);
+	        function sha256_Gamma1256(x) {
+	          return sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10);
+	        }
 
-	        var isNewFeature = !mode.isContinuing;
-	        context.enter(modeSelect(context, [wayID]).newFeature(isNewFeature));
-	    };
+	        sha256_K = [1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993, -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987, 1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522, 264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986, -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585, 113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291, 1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885, -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344, 430227734, 506948616, 659060556, 883997877, 958139571, 1322822218, 1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872, -1866530822, -1538233109, -1090935817, -965641998];
 
+	        function binb(m, l) {
+	          var HASH = [1779033703, -1150833019, 1013904242, -1521486534, 1359893119, -1694144372, 528734635, 1541459225];
+	          var W = new Array(64);
+	          var a, b, c, d, e, f, g, h;
+	          var i, j, T1, T2;
+	          /* append padding */
 
-	    // Cancel the draw operation, delete everything, and return to browse mode.
-	    drawWay.cancel = function() {
-	        context.pauseChangeDispatch();
-	        resetToStartGraph();
-	        context.resumeChangeDispatch();
+	          m[l >> 5] |= 0x80 << 24 - l % 32;
+	          m[(l + 64 >> 9 << 4) + 15] = l;
 
-	        window.setTimeout(function() {
-	            context.map().dblclickZoomEnable(true);
-	        }, 1000);
+	          for (i = 0; i < m.length; i += 16) {
+	            a = HASH[0];
+	            b = HASH[1];
+	            c = HASH[2];
+	            d = HASH[3];
+	            e = HASH[4];
+	            f = HASH[5];
+	            g = HASH[6];
+	            h = HASH[7];
 
-	        context.surface()
-	            .classed('nope', false)
-	            .classed('nope-disabled', false)
-	            .classed('nope-suppressed', false);
+	            for (j = 0; j < 64; j += 1) {
+	              if (j < 16) {
+	                W[j] = m[j + i];
+	              } else {
+	                W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]), sha256_Gamma0256(W[j - 15])), W[j - 16]);
+	              }
 
-	        context.enter(modeBrowse(context));
-	    };
+	              T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)), sha256_K[j]), W[j]);
+	              T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
+	              h = g;
+	              g = f;
+	              f = e;
+	              e = safe_add(d, T1);
+	              d = c;
+	              c = b;
+	              b = a;
+	              a = safe_add(T1, T2);
+	            }
+
+	            HASH[0] = safe_add(a, HASH[0]);
+	            HASH[1] = safe_add(b, HASH[1]);
+	            HASH[2] = safe_add(c, HASH[2]);
+	            HASH[3] = safe_add(d, HASH[3]);
+	            HASH[4] = safe_add(e, HASH[4]);
+	            HASH[5] = safe_add(f, HASH[5]);
+	            HASH[6] = safe_add(g, HASH[6]);
+	            HASH[7] = safe_add(h, HASH[7]);
+	          }
 
+	          return HASH;
+	        }
+	      },
 
-	    drawWay.nodeIndex = function(val) {
-	        if (!arguments.length) { return _nodeIndex; }
-	        _nodeIndex = val;
-	        return drawWay;
-	    };
+	      /**
+	       * @class Hashes.SHA512
+	       * @param {config}
+	       *
+	       * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined in FIPS 180-2
+	       * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See http://pajhome.org.uk/crypt/md5 for details.
+	       */
+	      SHA512: function SHA512(options) {
+	        /**
+	         * Private properties configuration variables. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * @see this.setUpperCase() method
+	         * @see this.setPad() method
+	         */
+	        var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
 
+	        /* hexadecimal output case format. false - lowercase; true - uppercase  */
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
 
-	    drawWay.activeID = function() {
-	        if (!arguments.length) { return _drawNode && _drawNode.id; }
-	        // no assign
-	        return drawWay;
-	    };
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
+	        /* enable/disable utf8 encoding */
+	        sha512_k;
+	        /* privileged (public) methods */
 
-	    return utilRebind(drawWay, dispatch$1, 'on');
-	}
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s));
+	        };
 
-	function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
-	    var mode = {
-	        button: button,
-	        id: 'draw-line'
-	    };
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	    var behavior = behaviorDrawWay(context, wayID, mode, startGraph)
-	        .on('rejectedSelfIntersection.modeDrawLine', function() {
-	            context.ui().flash
-	                .text(_t('self_intersection.error.lines'))();
-	        });
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	    mode.wayID = wayID;
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	    mode.isContinuing = continuing;
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	    mode.enter = function() {
-	        behavior
-	            .nodeIndex(affix === 'prefix' ? 0 : undefined);
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	        context.install(behavior);
-	    };
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         * @public
+	         */
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
 
-	    mode.selectedIDs = function() {
-	        return [wayID];
-	    };
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    mode.activeID = function() {
-	        return (behavior && behavior.activeID()) || [];
-	    };
 
-	    return mode;
-	}
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	function operationContinue(context, selectedIDs) {
-	    var graph = context.graph();
-	    var entities = selectedIDs.map(function(id) { return graph.entity(id); });
-	    var geometries = Object.assign(
-	        { line: [], vertex: [] },
-	        utilArrayGroupBy(entities, function(entity) { return entity.geometry(graph); })
-	    );
-	    var vertex = geometries.vertex[0];
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
 
-	    function candidateWays() {
-	        return graph.parentWays(vertex).filter(function(parent) {
-	            return parent.geometry(graph) === 'line' &&
-	                !parent.isClosed() &&
-	                parent.affix(vertex.id) &&
-	                (geometries.line.length === 0 || geometries.line[0] === parent);
-	        });
-	    }
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
 
-	    var operation = function() {
-	        var candidate = candidateWays()[0];
-	        context.enter(
-	            modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(vertex.id), true)
-	        );
-	    };
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
+	          return this;
+	        };
+	        /* private methods */
 
-	    operation.available = function() {
-	        return geometries.vertex.length === 1 &&
-	            geometries.line.length <= 1 &&
-	            !context.features().hasHiddenConnections(vertex, context.graph());
-	    };
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
 
-	    operation.disabled = function() {
-	        var candidates = candidateWays();
-	        if (candidates.length === 0) {
-	            return 'not_eligible';
-	        } else if (candidates.length > 1) {
-	            return 'multiple';
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binb2rstr(binb(rstr2binb(s), s.length * 8));
 	        }
-
-	        return false;
-	    };
+	        /*
+	         * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
+	         */
 
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.continue.' + disable) :
-	            _t('operations.continue.description');
-	    };
+	        function rstr_hmac(key, data) {
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          var hash,
+	              i = 0,
+	              bkey = rstr2binb(key),
+	              ipad = Array(32),
+	              opad = Array(32);
 
+	          if (bkey.length > 32) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	    operation.annotation = function() {
-	        return _t('operations.continue.annotation.line');
-	    };
+	          for (; i < 32; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
+	          hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
+	          return binb2rstr(binb(opad.concat(hash), 1024 + 512));
+	        }
+	        /**
+	         * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
+	         */
+
+
+	        function binb(x, len) {
+	          var j,
+	              i,
+	              l,
+	              W = new Array(80),
+	              hash = new Array(16),
+	              //Initial hash values
+	          H = [new int64(0x6a09e667, -205731576), new int64(-1150833019, -2067093701), new int64(0x3c6ef372, -23791573), new int64(-1521486534, 0x5f1d36f1), new int64(0x510e527f, -1377402159), new int64(-1694144372, 0x2b3e6c1f), new int64(0x1f83d9ab, -79577749), new int64(0x5be0cd19, 0x137e2179)],
+	              T1 = new int64(0, 0),
+	              T2 = new int64(0, 0),
+	              a = new int64(0, 0),
+	              b = new int64(0, 0),
+	              c = new int64(0, 0),
+	              d = new int64(0, 0),
+	              e = new int64(0, 0),
+	              f = new int64(0, 0),
+	              g = new int64(0, 0),
+	              h = new int64(0, 0),
+	              //Temporary variables not specified by the document
+	          s0 = new int64(0, 0),
+	              s1 = new int64(0, 0),
+	              Ch = new int64(0, 0),
+	              Maj = new int64(0, 0),
+	              r1 = new int64(0, 0),
+	              r2 = new int64(0, 0),
+	              r3 = new int64(0, 0);
+
+	          if (sha512_k === undefined) {
+	            //SHA512 constants
+	            sha512_k = [new int64(0x428a2f98, -685199838), new int64(0x71374491, 0x23ef65cd), new int64(-1245643825, -330482897), new int64(-373957723, -2121671748), new int64(0x3956c25b, -213338824), new int64(0x59f111f1, -1241133031), new int64(-1841331548, -1357295717), new int64(-1424204075, -630357736), new int64(-670586216, -1560083902), new int64(0x12835b01, 0x45706fbe), new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, -704662302), new int64(0x72be5d74, -226784913), new int64(-2132889090, 0x3b1696b1), new int64(-1680079193, 0x25c71235), new int64(-1046744716, -815192428), new int64(-459576895, -1628353838), new int64(-272742522, 0x384f25e3), new int64(0xfc19dc6, -1953704523), new int64(0x240ca1cc, 0x77ac9c65), new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483), new int64(0x5cb0a9dc, -1119749164), new int64(0x76f988da, -2096016459), new int64(-1740746414, -295247957), new int64(-1473132947, 0x2db43210), new int64(-1341970488, -1728372417), new int64(-1084653625, -1091629340), new int64(-958395405, 0x3da88fc2), new int64(-710438585, -1828018395), new int64(0x6ca6351, -536640913), new int64(0x14292967, 0xa0e6e70), new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926), new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, -1651133473), new int64(0x650a7354, -1951439906), new int64(0x766a0abb, 0x3c77b2a8), new int64(-2117940946, 0x47edaee6), new int64(-1838011259, 0x1482353b), new int64(-1564481375, 0x4cf10364), new int64(-1474664885, -1136513023), new int64(-1035236496, -789014639), new int64(-949202525, 0x654be30), new int64(-778901479, -688958952), new int64(-694614492, 0x5565a910), new int64(-200395387, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8), new int64(0x19a4c116, -1194143544), new int64(0x1e376c08, 0x5141ab53), new int64(0x2748774c, -544281703), new int64(0x34b0bcb5, -509917016), new int64(0x391c0cb3, -976659869), new int64(0x4ed8aa4a, -482243893), new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, -692930397), new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60), new int64(-2067236844, -1578062990), new int64(-1933114872, 0x1a6439ec), new int64(-1866530822, 0x23631e28), new int64(-1538233109, -561857047), new int64(-1090935817, -1295615723), new int64(-965641998, -479046869), new int64(-903397682, -366583396), new int64(-779700025, 0x21c0c207), new int64(-354779690, -840897762), new int64(-176337025, -294727304), new int64(0x6f067aa, 0x72176fba), new int64(0xa637dc5, -1563912026), new int64(0x113f9804, -1090974290), new int64(0x1b710b35, 0x131c471b), new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493), new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, -1676669620), new int64(0x4cc5d4be, -885112138), new int64(0x597f299c, -60457430), new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817)];
+	          }
 
-	    operation.id = 'continue';
-	    operation.keys = [_t('operations.continue.key')];
-	    operation.title = _t('operations.continue.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	          for (i = 0; i < 80; i += 1) {
+	            W[i] = new int64(0, 0);
+	          } // append padding to the source string. The format is described in the FIPS.
+
+
+	          x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
+	          x[(len + 128 >> 10 << 5) + 31] = len;
+	          l = x.length;
+
+	          for (i = 0; i < l; i += 32) {
+	            //32 dwords is the block size
+	            int64copy(a, H[0]);
+	            int64copy(b, H[1]);
+	            int64copy(c, H[2]);
+	            int64copy(d, H[3]);
+	            int64copy(e, H[4]);
+	            int64copy(f, H[5]);
+	            int64copy(g, H[6]);
+	            int64copy(h, H[7]);
+
+	            for (j = 0; j < 16; j += 1) {
+	              W[j].h = x[i + 2 * j];
+	              W[j].l = x[i + 2 * j + 1];
+	            }
+
+	            for (j = 16; j < 80; j += 1) {
+	              //sigma1
+	              int64rrot(r1, W[j - 2], 19);
+	              int64revrrot(r2, W[j - 2], 29);
+	              int64shr(r3, W[j - 2], 6);
+	              s1.l = r1.l ^ r2.l ^ r3.l;
+	              s1.h = r1.h ^ r2.h ^ r3.h; //sigma0
+
+	              int64rrot(r1, W[j - 15], 1);
+	              int64rrot(r2, W[j - 15], 8);
+	              int64shr(r3, W[j - 15], 7);
+	              s0.l = r1.l ^ r2.l ^ r3.l;
+	              s0.h = r1.h ^ r2.h ^ r3.h;
+	              int64add4(W[j], s1, W[j - 7], s0, W[j - 16]);
+	            }
+
+	            for (j = 0; j < 80; j += 1) {
+	              //Ch
+	              Ch.l = e.l & f.l ^ ~e.l & g.l;
+	              Ch.h = e.h & f.h ^ ~e.h & g.h; //Sigma1
+
+	              int64rrot(r1, e, 14);
+	              int64rrot(r2, e, 18);
+	              int64revrrot(r3, e, 9);
+	              s1.l = r1.l ^ r2.l ^ r3.l;
+	              s1.h = r1.h ^ r2.h ^ r3.h; //Sigma0
+
+	              int64rrot(r1, a, 28);
+	              int64revrrot(r2, a, 2);
+	              int64revrrot(r3, a, 7);
+	              s0.l = r1.l ^ r2.l ^ r3.l;
+	              s0.h = r1.h ^ r2.h ^ r3.h; //Maj
+
+	              Maj.l = a.l & b.l ^ a.l & c.l ^ b.l & c.l;
+	              Maj.h = a.h & b.h ^ a.h & c.h ^ b.h & c.h;
+	              int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
+	              int64add(T2, s0, Maj);
+	              int64copy(h, g);
+	              int64copy(g, f);
+	              int64copy(f, e);
+	              int64add(e, d, T1);
+	              int64copy(d, c);
+	              int64copy(c, b);
+	              int64copy(b, a);
+	              int64add(a, T1, T2);
+	            }
+
+	            int64add(H[0], H[0], a);
+	            int64add(H[1], H[1], b);
+	            int64add(H[2], H[2], c);
+	            int64add(H[3], H[3], d);
+	            int64add(H[4], H[4], e);
+	            int64add(H[5], H[5], f);
+	            int64add(H[6], H[6], g);
+	            int64add(H[7], H[7], h);
+	          } //represent the hash as an array of 32-bit dwords
+
+
+	          for (i = 0; i < 8; i += 1) {
+	            hash[2 * i] = H[i].h;
+	            hash[2 * i + 1] = H[i].l;
+	          }
 
-	    return operation;
-	}
+	          return hash;
+	        } //A constructor for 64-bit numbers
 
-	function operationCopy(context, selectedIDs) {
 
-	    var _multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	        function int64(h, l) {
+	          this.h = h;
+	          this.l = l; //this.toString = int64toString;
+	        } //Copies src into dst, assuming both are 64-bit numbers
 
-	    function getFilteredIdsToCopy() {
-	        return selectedIDs.filter(function(selectedID) {
-	            var entity = context.graph().hasEntity(selectedID);
-	            // don't copy untagged vertices separately from ways
-	            return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
-	        });
-	    }
 
-	    var operation = function() {
+	        function int64copy(dst, src) {
+	          dst.h = src.h;
+	          dst.l = src.l;
+	        } //Right-rotates a 64-bit number by shift
+	        //Won't handle cases of shift>=32
+	        //The function revrrot() is for that
 
-	        if (!getSelectionText()) {
-	            event.preventDefault();
-	        }
 
-	        var graph = context.graph();
-	        var selected = groupEntities(getFilteredIdsToCopy(), graph);
-	        var canCopy = [];
-	        var skip = {};
-	        var entity;
-	        var i;
+	        function int64rrot(dst, x, shift) {
+	          dst.l = x.l >>> shift | x.h << 32 - shift;
+	          dst.h = x.h >>> shift | x.l << 32 - shift;
+	        } //Reverses the dwords of the source and then rotates right by shift.
+	        //This is equivalent to rotation by 32+shift
 
-	        for (i = 0; i < selected.relation.length; i++) {
-	            entity = selected.relation[i];
-	            if (!skip[entity.id] && entity.isComplete(graph)) {
-	                canCopy.push(entity.id);
-	                skip = getDescendants(entity.id, graph, skip);
-	            }
-	        }
-	        for (i = 0; i < selected.way.length; i++) {
-	            entity = selected.way[i];
-	            if (!skip[entity.id]) {
-	                canCopy.push(entity.id);
-	                skip = getDescendants(entity.id, graph, skip);
-	            }
-	        }
-	        for (i = 0; i < selected.node.length; i++) {
-	            entity = selected.node[i];
-	            if (!skip[entity.id]) {
-	                canCopy.push(entity.id);
-	            }
-	        }
 
-	        context.copyIDs(canCopy);
-	        if (_point &&
-	            (canCopy.length !== 1 || graph.entity(canCopy[0]).type !== 'node')) {
-	            // store the anchor coordinates if copying more than a single node
-	            context.copyLonLat(context.projection.invert(_point));
-	        } else {
-	            context.copyLonLat(null);
-	        }
+	        function int64revrrot(dst, x, shift) {
+	          dst.l = x.h >>> shift | x.l << 32 - shift;
+	          dst.h = x.l >>> shift | x.h << 32 - shift;
+	        } //Bitwise-shifts right a 64-bit number by shift
+	        //Won't handle shift>=32, but it's never needed in SHA512
 
-	    };
 
+	        function int64shr(dst, x, shift) {
+	          dst.l = x.l >>> shift | x.h << 32 - shift;
+	          dst.h = x.h >>> shift;
+	        } //Adds two 64-bit numbers
+	        //Like the original implementation, does not rely on 32-bit operations
 
-	    function groupEntities(ids, graph) {
-	        var entities = ids.map(function (id) { return graph.entity(id); });
-	        return Object.assign(
-	            { relation: [], way: [], node: [] },
-	            utilArrayGroupBy(entities, 'type')
-	        );
-	    }
 
+	        function int64add(dst, x, y) {
+	          var w0 = (x.l & 0xffff) + (y.l & 0xffff);
+	          var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
+	          var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
+	          var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
+	          dst.l = w0 & 0xffff | w1 << 16;
+	          dst.h = w2 & 0xffff | w3 << 16;
+	        } //Same, except with 4 addends. Works faster than adding them one by one.
 
-	    function getDescendants(id, graph, descendants) {
-	        var entity = graph.entity(id);
-	        var children;
 
-	        descendants = descendants || {};
+	        function int64add4(dst, a, b, c, d) {
+	          var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
+	          var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
+	          var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
+	          var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
+	          dst.l = w0 & 0xffff | w1 << 16;
+	          dst.h = w2 & 0xffff | w3 << 16;
+	        } //Same, except with 5 addends
 
-	        if (entity.type === 'relation') {
-	            children = entity.members.map(function(m) { return m.id; });
-	        } else if (entity.type === 'way') {
-	            children = entity.nodes;
-	        } else {
-	            children = [];
-	        }
 
-	        for (var i = 0; i < children.length; i++) {
-	            if (!descendants[children[i]]) {
-	                descendants[children[i]] = true;
-	                descendants = getDescendants(children[i], graph, descendants);
-	            }
+	        function int64add5(dst, a, b, c, d, e) {
+	          var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff),
+	              w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16),
+	              w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16),
+	              w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
+	          dst.l = w0 & 0xffff | w1 << 16;
+	          dst.h = w2 & 0xffff | w3 << 16;
 	        }
+	      },
 
-	        return descendants;
-	    }
+	      /**
+	       * @class Hashes.RMD160
+	       * @constructor
+	       * @param {Object} [config]
+	       *
+	       * A JavaScript implementation of the RIPEMD-160 Algorithm
+	       * Version 2.2 Copyright Jeremy Lin, Paul Johnston 2000 - 2009.
+	       * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+	       * See http://pajhome.org.uk/crypt/md5 for details.
+	       * Also http://www.ocf.berkeley.edu/~jjlin/jsotp/
+	       */
+	      RMD160: function RMD160(options) {
+	        /**
+	         * Private properties configuration variables. You may need to tweak these to be compatible with
+	         * the server-side, but the defaults work in most cases.
+	         * @see this.setUpperCase() method
+	         * @see this.setPad() method
+	         */
+	        var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
 
+	        /* hexadecimal output case format. false - lowercase; true - uppercase  */
+	        b64pad = options && typeof options.pad === 'string' ? options.pa : '=',
 
-	    function getSelectionText() {
-	        return window.getSelection().toString();
-	    }
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
+	        /* enable/disable utf8 encoding */
+	        rmd160_r1 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8, 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12, 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2, 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13],
+	            rmd160_r2 = [5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12, 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2, 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13, 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14, 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11],
+	            rmd160_s1 = [11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8, 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12, 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5, 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12, 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6],
+	            rmd160_s2 = [8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6, 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11, 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5, 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8, 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11];
+	        /* privileged (public) methods */
+
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s));
+	        };
 
-	    operation.available = function() {
-	        return getFilteredIdsToCopy().length > 0;
-	    };
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	    operation.disabled = function() {
-	        var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        }
-	        return false;
-	    };
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.copy.' + disable + '.' + _multi) :
-	            _t('operations.copy.description' + '.' + _multi);
-	    };
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
+	        this.any_hmac = function (k, d, e) {
+	          return rstr2any(rstr_hmac(k, d), e);
+	        };
+	        /**
+	         * Perform a simple self-test to see if the VM is working
+	         * @return {String} Hexadecimal hash sample
+	         * @public
+	         */
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.copy.annotation.single') :
-	            _t('operations.copy.annotation.multiple', { n: selectedIDs.length.toString() });
-	    };
 
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    var _point;
-	    operation.point = function(val) {
-	        _point = val;
-	        return operation;
-	    };
 
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	    operation.id = 'copy';
-	    operation.keys = [uiCmd('⌘C')];
-	    operation.title = _t('operations.copy.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    return operation;
-	}
 
-	function operationDisconnect(context, selectedIDs) {
-	    var _vertexIDs = [];
-	    var _wayIDs = [];
-	    var _otherIDs = [];
-	    var _actions = [];
+	        this.setPad = function (a) {
+	          if (typeof a !== 'undefined') {
+	            b64pad = a;
+	          }
 
-	    selectedIDs.forEach(function(id) {
-	        var entity = context.entity(id);
-	        if (entity.type === 'way'){
-	            _wayIDs.push(id);
-	        } else if (entity.geometry(context.graph()) === 'vertex') {
-	            _vertexIDs.push(id);
-	        } else {
-	            _otherIDs.push(id);
-	        }
-	    });
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    var _extent, _nodes, _coords, _descriptionID = '', _annotationID = 'features';
 
-	    if (_vertexIDs.length > 0) {
-	        // At the selected vertices, disconnect the selected ways, if any, else
-	        // disconnect all connected ways
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	        _extent = utilTotalExtent(_vertexIDs, context.graph());
+	          return this;
+	        };
+	        /* private methods */
 
-	        _vertexIDs.forEach(function(vertexID) {
-	            var action = actionDisconnect(vertexID);
+	        /**
+	         * Calculate the rmd160 of a raw string
+	         */
 
-	            if (_wayIDs.length > 0) {
-	                var waysIDsForVertex = _wayIDs.filter(function(wayID) {
-	                    var way = context.entity(wayID);
-	                    return way.nodes.indexOf(vertexID) !== -1;
-	                });
-	                action.limitWays(waysIDsForVertex);
-	            }
-	            _actions.push(action);
-	        });
 
-	        _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
-	        if (_wayIDs.length === 1) {
-	            _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
-	        } else {
-	            _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binl2rstr(binl(rstr2binl(s), s.length * 8));
 	        }
+	        /**
+	         * Calculate the HMAC-rmd160 of a key and some data (raw strings)
+	         */
 
-	    } else if (_wayIDs.length > 0) {
-	        // Disconnect the selected ways from each other, if they're connected,
-	        // else disconnect them from all connected ways
 
-	        var ways = _wayIDs.map(function(id) {
-	            return context.entity(id);
-	        });
-	        _nodes = utilGetAllNodes(_wayIDs, context.graph());
-	        _coords = _nodes.map(function(n) { return n.loc; });
-	        _extent = utilTotalExtent(ways, context.graph());
-
-	        // actions for connected nodes shared by at least two selected ways
-	        var sharedActions = [];
-	        // actions for connected nodes
-	        var unsharedActions = [];
-
-	        _nodes.forEach(function(node) {
-	            var action = actionDisconnect(node.id).limitWays(_wayIDs);
-	            if (action.disabled(context.graph()) !== 'not_connected') {
-
-	                var count = 0;
-	                for (var i in ways) {
-	                    var way = ways[i];
-	                    if (way.nodes.indexOf(node.id) !== -1) {
-	                        count += 1;
-	                    }
-	                    if (count > 1) { break; }
-	                }
+	        function rstr_hmac(key, data) {
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          var i,
+	              hash,
+	              bkey = rstr2binl(key),
+	              ipad = Array(16),
+	              opad = Array(16);
 
-	                if (count > 1) {
-	                    sharedActions.push(action);
-	                } else {
-	                    unsharedActions.push(action);
-	                }
-	            }
-	        });
+	          if (bkey.length > 16) {
+	            bkey = binl(bkey, key.length * 8);
+	          }
 
-	        _descriptionID += 'no_points.';
-	        _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	        if (sharedActions.length) {
-	            // if any nodes are shared, only disconnect the selected ways from each other
-	            _actions = sharedActions;
-	            _descriptionID += 'conjoined';
-	            _annotationID = 'from_each_other';
-	        } else {
-	            // if no nodes are shared, disconnect the selected ways from all connected ways
-	            _actions = unsharedActions;
-	            if (_wayIDs.length === 1) {
-	                _descriptionID += context.graph().geometry(_wayIDs[0]);
-	            } else {
-	                _descriptionID += 'separate';
-	            }
+	          hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
+	          return binl2rstr(binl(opad.concat(hash), 512 + 160));
 	        }
-	    }
-
+	        /**
+	         * Convert an array of little-endian words to a string
+	         */
 
-	    var operation = function() {
-	        context.perform(function(graph) {
-	            return _actions.reduce(function(graph, action) { return action(graph); }, graph);
-	        }, operation.annotation());
 
-	        context.validator().validate();
-	    };
-
-
-	    operation.available = function() {
-	        if (_actions.length === 0) { return false; }
-	        if (_otherIDs.length !== 0) { return false; }
+	        function binl2rstr(input) {
+	          var i,
+	              output = '',
+	              l = input.length * 32;
 
-	        if (_vertexIDs.length !== 0 && _wayIDs.length !== 0 && !_wayIDs.every(function(wayID) {
-	            return _vertexIDs.some(function(vertexID) {
-	                var way = context.entity(wayID);
-	                return way.nodes.indexOf(vertexID) !== -1;
-	            });
-	        })) { return false; }
+	          for (i = 0; i < l; i += 8) {
+	            output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+	          }
 
-	        return true;
-	    };
+	          return output;
+	        }
+	        /**
+	         * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
+	         */
+
+
+	        function binl(x, len) {
+	          var T,
+	              j,
+	              i,
+	              l,
+	              h0 = 0x67452301,
+	              h1 = 0xefcdab89,
+	              h2 = 0x98badcfe,
+	              h3 = 0x10325476,
+	              h4 = 0xc3d2e1f0,
+	              A1,
+	              B1,
+	              C1,
+	              D1,
+	              E1,
+	              A2,
+	              B2,
+	              C2,
+	              D2,
+	              E2;
+	          /* append padding */
+
+	          x[len >> 5] |= 0x80 << len % 32;
+	          x[(len + 64 >>> 9 << 4) + 14] = len;
+	          l = x.length;
+
+	          for (i = 0; i < l; i += 16) {
+	            A1 = A2 = h0;
+	            B1 = B2 = h1;
+	            C1 = C2 = h2;
+	            D1 = D2 = h3;
+	            E1 = E2 = h4;
+
+	            for (j = 0; j <= 79; j += 1) {
+	              T = safe_add(A1, rmd160_f(j, B1, C1, D1));
+	              T = safe_add(T, x[i + rmd160_r1[j]]);
+	              T = safe_add(T, rmd160_K1(j));
+	              T = safe_add(bit_rol(T, rmd160_s1[j]), E1);
+	              A1 = E1;
+	              E1 = D1;
+	              D1 = bit_rol(C1, 10);
+	              C1 = B1;
+	              B1 = T;
+	              T = safe_add(A2, rmd160_f(79 - j, B2, C2, D2));
+	              T = safe_add(T, x[i + rmd160_r2[j]]);
+	              T = safe_add(T, rmd160_K2(j));
+	              T = safe_add(bit_rol(T, rmd160_s2[j]), E2);
+	              A2 = E2;
+	              E2 = D2;
+	              D2 = bit_rol(C2, 10);
+	              C2 = B2;
+	              B2 = T;
+	            }
+
+	            T = safe_add(h1, safe_add(C1, D2));
+	            h1 = safe_add(h2, safe_add(D1, E2));
+	            h2 = safe_add(h3, safe_add(E1, A2));
+	            h3 = safe_add(h4, safe_add(A1, B2));
+	            h4 = safe_add(h0, safe_add(B1, C2));
+	            h0 = T;
+	          }
 
+	          return [h0, h1, h2, h3, h4];
+	        } // specific algorithm methods
 
-	    operation.disabled = function() {
-	        var reason;
-	        for (var actionIndex in _actions) {
-	            reason = _actions[actionIndex].disabled(context.graph());
-	            if (reason) { return reason; }
-	        }
 
-	        if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large.' + ((_vertexIDs.length ? _vertexIDs : _wayIDs).length === 1 ? 'single' : 'multiple');
-	        } else if (_coords && someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
+	        function rmd160_f(j, x, y, z) {
+	          return 0 <= j && j <= 15 ? x ^ y ^ z : 16 <= j && j <= 31 ? x & y | ~x & z : 32 <= j && j <= 47 ? (x | ~y) ^ z : 48 <= j && j <= 63 ? x & z | y & ~z : 64 <= j && j <= 79 ? x ^ (y | ~z) : 'rmd160_f: j out of range';
 	        }
 
-	        return false;
-
-
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
+	        function rmd160_K1(j) {
+	          return 0 <= j && j <= 15 ? 0x00000000 : 16 <= j && j <= 31 ? 0x5a827999 : 32 <= j && j <= 47 ? 0x6ed9eba1 : 48 <= j && j <= 63 ? 0x8f1bbcdc : 64 <= j && j <= 79 ? 0xa953fd4e : 'rmd160_K1: j out of range';
 	        }
-	    };
-
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        if (disable) {
-	            return _t('operations.disconnect.' + disable);
+	        function rmd160_K2(j) {
+	          return 0 <= j && j <= 15 ? 0x50a28be6 : 16 <= j && j <= 31 ? 0x5c4dd124 : 32 <= j && j <= 47 ? 0x6d703ef3 : 48 <= j && j <= 63 ? 0x7a6d76e9 : 64 <= j && j <= 79 ? 0x00000000 : 'rmd160_K2: j out of range';
 	        }
-	        return _t('operations.disconnect.description.' + _descriptionID);
-	    };
+	      }
+	    }; // exposes Hashes
 
+	    (function (window, undefined$1) {
+	      var freeExports = false;
 
-	    operation.annotation = function() {
-	        return _t('operations.disconnect.annotation.' + _annotationID);
-	    };
+	      {
+	        freeExports = exports;
 
+	        if (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
+	          window = commonjsGlobal;
+	        }
+	      }
 
-	    operation.id = 'disconnect';
-	    operation.keys = [_t('operations.disconnect.key')];
-	    operation.title = _t('operations.disconnect.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	      if (typeof undefined$1 === 'function' && _typeof(undefined$1.amd) === 'object' && undefined$1.amd) {
+	        // define as an anonymous module, so, through path mapping, it can be aliased
+	        undefined$1(function () {
+	          return Hashes;
+	        });
+	      } else if (freeExports) {
+	        // in Node.js or RingoJS v0.8.0+
+	        if ( module && module.exports === freeExports) {
+	          module.exports = Hashes;
+	        } // in Narwhal or RingoJS v0.7.0-
+	        else {
+	            freeExports.Hashes = Hashes;
+	          }
+	      } else {
+	        // in a browser or Rhino
+	        window.Hashes = Hashes;
+	      }
+	    })(this);
+	  })(); // IIFE
 
-	    return operation;
-	}
+	});
 
-	function operationDowngrade(context, selectedIDs) {
-	    var affectedFeatureCount = 0;
-	    var downgradeType;
+	var immutable = extend$2;
+	var hasOwnProperty$2 = Object.prototype.hasOwnProperty;
 
-	    setDowngradeTypeForEntityIDs();
+	function extend$2() {
+	  var target = {};
 
-	    var multi = affectedFeatureCount === 1 ? 'single' : 'multiple';
+	  for (var i = 0; i < arguments.length; i++) {
+	    var source = arguments[i];
 
-	    function setDowngradeTypeForEntityIDs() {
-	        for (var i in selectedIDs) {
-	            var entityID = selectedIDs[i];
-	            var type = downgradeTypeForEntityID(entityID);
-	            if (type) {
-	                affectedFeatureCount += 1;
-	                if (downgradeType && type !== downgradeType) {
-	                    downgradeType = 'building_address';
-	                } else {
-	                    downgradeType = type;
-	                }
-	            }
-	        }
+	    for (var key in source) {
+	      if (hasOwnProperty$2.call(source, key)) {
+	        target[key] = source[key];
+	      }
 	    }
+	  }
 
-	    function downgradeTypeForEntityID(entityID) {
-	        var graph = context.graph();
-	        var entity = graph.entity(entityID);
-	        var preset = _mainPresetIndex.match(entity, graph);
+	  return target;
+	}
 
-	        if (!preset || preset.isFallback()) { return null; }
+	var sha1 = new hashes.SHA1();
+	var ohauth = {};
 
-	        if (entity.type === 'node' &&
-	            preset.id !== 'address' &&
-	            Object.keys(entity.tags).some(function(key) {
-	                return key.match(/^addr:.{1,}/);
-	            })) {
+	ohauth.qsString = function (obj) {
+	  return Object.keys(obj).sort().map(function (key) {
+	    return ohauth.percentEncode(key) + '=' + ohauth.percentEncode(obj[key]);
+	  }).join('&');
+	};
 
-	            return 'address';
-	        }
-	        if (entity.geometry(graph) === 'area' &&
-	            entity.tags.building &&
-	            !preset.tags.building) {
+	ohauth.stringQs = function (str) {
+	  return str.split('&').filter(function (pair) {
+	    return pair !== '';
+	  }).reduce(function (obj, pair) {
+	    var parts = pair.split('=');
+	    obj[decodeURIComponent(parts[0])] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
+	    return obj;
+	  }, {});
+	};
 
-	            return 'building';
-	        }
+	ohauth.rawxhr = function (method, url, data, headers, callback) {
+	  var xhr = new XMLHttpRequest(),
+	      twoHundred = /^20\d$/;
 
-	        return null;
+	  xhr.onreadystatechange = function () {
+	    if (4 === xhr.readyState && 0 !== xhr.status) {
+	      if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);
 	    }
+	  };
 
-	    var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
-	    var addressKeysToKeep = ['source'];
+	  xhr.onerror = function (e) {
+	    return callback(e, null);
+	  };
 
-	    var operation = function () {
-	        context.perform(function(graph) {
+	  xhr.open(method, url, true);
 
-	            for (var i in selectedIDs) {
-	                var entityID = selectedIDs[i];
-	                var type = downgradeTypeForEntityID(entityID);
-	                if (!type) { continue; }
+	  for (var h in headers) {
+	    xhr.setRequestHeader(h, headers[h]);
+	  }
 
-	                var tags = Object.assign({}, graph.entity(entityID).tags);  // shallow copy
-	                for (var key in tags) {
-	                    if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) { continue; }
-	                    if (type === 'building') {
-	                        if (buildingKeysToKeep.indexOf(key) !== -1 ||
-	                            key.match(/^building:.{1,}/) ||
-	                            key.match(/^roof:.{1,}/)) { continue; }
-	                    }
-	                    // keep address tags for buildings too
-	                    if (key.match(/^addr:.{1,}/)) { continue; }
+	  xhr.send(data);
+	  return xhr;
+	};
 
-	                    delete tags[key];
-	                }
-	                graph = actionChangeTags(entityID, tags)(graph);
-	            }
-	            return graph;
-	        }, operation.annotation());
+	ohauth.xhr = function (method, url, auth, data, options, callback) {
+	  var headers = options && options.header || {
+	    'Content-Type': 'application/x-www-form-urlencoded'
+	  };
+	  headers.Authorization = 'OAuth ' + ohauth.authHeader(auth);
+	  return ohauth.rawxhr(method, url, data, headers, callback);
+	};
 
-	        context.validator().validate();
+	ohauth.nonce = function () {
+	  for (var o = ''; o.length < 6;) {
+	    o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
+	  }
 
-	        // refresh the select mode to enable the delete operation
-	        context.enter(modeSelect(context, selectedIDs));
-	    };
+	  return o;
+	};
 
+	ohauth.authHeader = function (obj) {
+	  return Object.keys(obj).sort().map(function (key) {
+	    return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
+	  }).join(', ');
+	};
 
-	    operation.available = function () {
-	        return downgradeType;
-	    };
+	ohauth.timestamp = function () {
+	  return ~~(+new Date() / 1000);
+	};
 
+	ohauth.percentEncode = function (s) {
+	  return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
+	};
 
-	    operation.disabled = function () {
-	        if (selectedIDs.some(hasWikidataTag)) {
-	            return 'has_wikidata_tag';
-	        }
-	        return false;
+	ohauth.baseString = function (method, url, params) {
+	  if (params.oauth_signature) delete params.oauth_signature;
+	  return [method, ohauth.percentEncode(url), ohauth.percentEncode(ohauth.qsString(params))].join('&');
+	};
 
-	        function hasWikidataTag(id) {
-	            var entity = context.entity(id);
-	            return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-	        }
-	    };
+	ohauth.signature = function (oauth_secret, token_secret, baseString) {
+	  return sha1.b64_hmac(ohauth.percentEncode(oauth_secret) + '&' + ohauth.percentEncode(token_secret), baseString);
+	};
+	/**
+	 * Takes an options object for configuration (consumer_key,
+	 * consumer_secret, version, signature_method, token, token_secret)
+	 * and returns a function that generates the Authorization header
+	 * for given data.
+	 *
+	 * The returned function takes these parameters:
+	 * - method: GET/POST/...
+	 * - uri: full URI with protocol, port, path and query string
+	 * - extra_params: any extra parameters (that are passed in the POST data),
+	 *   can be an object or a from-urlencoded string.
+	 *
+	 * Returned function returns full OAuth header with "OAuth" string in it.
+	 */
 
 
-	    operation.tooltip = function () {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.downgrade.' + disable + '.' + multi) :
-	            _t('operations.downgrade.description.' + downgradeType);
-	    };
+	ohauth.headerGenerator = function (options) {
+	  options = options || {};
+	  var consumer_key = options.consumer_key || '',
+	      consumer_secret = options.consumer_secret || '',
+	      signature_method = options.signature_method || 'HMAC-SHA1',
+	      version = options.version || '1.0',
+	      token = options.token || '',
+	      token_secret = options.token_secret || '';
+	  return function (method, uri, extra_params) {
+	    method = method.toUpperCase();
 
+	    if (typeof extra_params === 'string' && extra_params.length > 0) {
+	      extra_params = ohauth.stringQs(extra_params);
+	    }
 
-	    operation.annotation = function () {
-	        var suffix;
-	        if (downgradeType === 'building_address') {
-	            suffix = 'multiple';
-	        } else {
-	            suffix = downgradeType + '.' + multi;
-	        }
-	        return _t('operations.downgrade.annotation.' + suffix, { n: affectedFeatureCount});
+	    var uri_parts = uri.split('?', 2),
+	        base_uri = uri_parts[0];
+	    var query_params = uri_parts.length === 2 ? ohauth.stringQs(uri_parts[1]) : {};
+	    var oauth_params = {
+	      oauth_consumer_key: consumer_key,
+	      oauth_signature_method: signature_method,
+	      oauth_version: version,
+	      oauth_timestamp: ohauth.timestamp(),
+	      oauth_nonce: ohauth.nonce()
 	    };
+	    if (token) oauth_params.oauth_token = token;
+	    var all_params = immutable({}, oauth_params, query_params, extra_params),
+	        base_str = ohauth.baseString(method, base_uri, all_params);
+	    oauth_params.oauth_signature = ohauth.signature(consumer_secret, token_secret, base_str);
+	    return 'OAuth ' + ohauth.authHeader(oauth_params);
+	  };
+	};
 
+	var ohauth_1 = ohauth;
 
-	    operation.id = 'downgrade';
-	    operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-	    operation.title = _t('operations.downgrade.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
-
+	var resolveUrl$1 = createCommonjsModule(function (module, exports) {
+	  // Copyright 2014 Simon Lydell
+	  // X11 (“MIT”) Licensed. (See LICENSE.)
+	  void function (root, factory) {
+	    {
+	      module.exports = factory();
+	    }
+	  }(commonjsGlobal, function () {
+	    function resolveUrl()
+	    /* ...urls */
+	    {
+	      var numUrls = arguments.length;
 
-	    return operation;
-	}
+	      if (numUrls === 0) {
+	        throw new Error("resolveUrl requires at least one argument; got none.");
+	      }
 
-	function operationExtract(context, selectedIDs) {
+	      var base = document.createElement("base");
+	      base.href = arguments[0];
 
-	    var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
-	    var _geometries = utilArrayUniq(selectedIDs.map(function(entityID) {
-	        return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
-	    }).filter(Boolean));
-	    var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
+	      if (numUrls === 1) {
+	        return base.href;
+	      }
 
-	    var _extent;
-	    var _actions = selectedIDs.map(function(entityID) {
-	        var graph = context.graph();
-	        var entity = graph.hasEntity(entityID);
-	        if (!entity || !entity.hasInterestingTags()) { return; }
+	      var head = document.getElementsByTagName("head")[0];
+	      head.insertBefore(base, head.firstChild);
+	      var a = document.createElement("a");
+	      var resolved;
 
-	        if (entity.type === 'node' && graph.parentWays(entity).length === 0) { return; }
+	      for (var index = 1; index < numUrls; index++) {
+	        a.href = arguments[index];
+	        resolved = a.href;
+	        base.href = resolved;
+	      }
 
-	        if (entity.type !== 'node') {
-	            var preset = _mainPresetIndex.match(entity, graph);
-	            // only allow extraction from ways/relations if the preset supports points
-	            if (preset.geometry.indexOf('point') === -1) { return; }
-	        }
+	      head.removeChild(base);
+	      return resolved;
+	    }
 
-	        _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+	    return resolveUrl;
+	  });
+	});
 
-	        return actionExtract(entityID);
-	    }).filter(Boolean);
+	var assign = make_assign();
+	var create$1 = make_create();
+	var trim$3 = make_trim();
+	var Global = typeof window !== 'undefined' ? window : commonjsGlobal;
+	var util = {
+	  assign: assign,
+	  create: create$1,
+	  trim: trim$3,
+	  bind: bind$1,
+	  slice: slice$2,
+	  each: each,
+	  map: map$1,
+	  pluck: pluck,
+	  isList: isList,
+	  isFunction: isFunction,
+	  isObject: isObject$2,
+	  Global: Global
+	};
 
+	function make_assign() {
+	  if (Object.assign) {
+	    return Object.assign;
+	  } else {
+	    return function shimAssign(obj, props1, props2, etc) {
+	      for (var i = 1; i < arguments.length; i++) {
+	        each(Object(arguments[i]), function (val, key) {
+	          obj[key] = val;
+	        });
+	      }
 
-	    var operation = function () {
-	        var combinedAction = function(graph) {
-	            _actions.forEach(function(action) {
-	                graph = action(graph);
-	            });
-	            return graph;
-	        };
-	        context.perform(combinedAction, operation.annotation());  // do the extract
+	      return obj;
+	    };
+	  }
+	}
 
-	        var extractedNodeIDs = _actions.map(function(action) {
-	            return action.getExtractedNodeID();
-	        });
-	        context.enter(modeSelect(context, extractedNodeIDs));
+	function make_create() {
+	  if (Object.create) {
+	    return function create(obj, assignProps1, assignProps2, etc) {
+	      var assignArgsList = slice$2(arguments, 1);
+	      return assign.apply(this, [Object.create(obj)].concat(assignArgsList));
 	    };
+	  } else {
+	    var F = function F() {}; // eslint-disable-line no-inner-declarations
 
 
-	    operation.available = function () {
-	        return _actions.length && selectedIDs.length === _actions.length;
+	    return function create(obj, assignProps1, assignProps2, etc) {
+	      var assignArgsList = slice$2(arguments, 1);
+	      F.prototype = obj;
+	      return assign.apply(this, [new F()].concat(assignArgsList));
 	    };
+	  }
+	}
 
+	function make_trim() {
+	  if (String.prototype.trim) {
+	    return function trim(str) {
+	      return String.prototype.trim.call(str);
+	    };
+	  } else {
+	    return function trim(str) {
+	      return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
+	    };
+	  }
+	}
 
-	    operation.disabled = function () {
+	function bind$1(obj, fn) {
+	  return function () {
+	    return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
+	  };
+	}
 
-	        if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (selectedIDs.some(function(entityID) {
-	            return context.graph().geometry(entityID) === 'vertex' && context.hasHiddenConnections(entityID);
-	        })) {
-	            return 'connected_to_hidden';
-	        }
+	function slice$2(arr, index) {
+	  return Array.prototype.slice.call(arr, index || 0);
+	}
 
-	        return false;
-	    };
+	function each(obj, fn) {
+	  pluck(obj, function (val, key) {
+	    fn(val, key);
+	    return false;
+	  });
+	}
 
+	function map$1(obj, fn) {
+	  var res = isList(obj) ? [] : {};
+	  pluck(obj, function (v, k) {
+	    res[k] = fn(v, k);
+	    return false;
+	  });
+	  return res;
+	}
 
-	    operation.tooltip = function () {
-	        var disableReason = operation.disabled();
-	        if (disableReason) {
-	            return _t('operations.extract.' + disableReason + '.' + _amount);
-	        } else {
-	            return _t('operations.extract.description.' + _geometryID + '.' + _amount);
+	function pluck(obj, fn) {
+	  if (isList(obj)) {
+	    for (var i = 0; i < obj.length; i++) {
+	      if (fn(obj[i], i)) {
+	        return obj[i];
+	      }
+	    }
+	  } else {
+	    for (var key in obj) {
+	      if (obj.hasOwnProperty(key)) {
+	        if (fn(obj[key], key)) {
+	          return obj[key];
 	        }
-	    };
+	      }
+	    }
+	  }
+	}
 
+	function isList(val) {
+	  return val != null && typeof val != 'function' && typeof val.length == 'number';
+	}
 
-	    operation.annotation = function () {
-	        return _t('operations.extract.annotation.' + _amount, { n: selectedIDs.length });
-	    };
+	function isFunction(val) {
+	  return val && {}.toString.call(val) === '[object Function]';
+	}
+
+	function isObject$2(val) {
+	  return val && {}.toString.call(val) === '[object Object]';
+	}
 
+	var slice$3 = util.slice;
+	var pluck$1 = util.pluck;
+	var each$1 = util.each;
+	var bind$2 = util.bind;
+	var create$2 = util.create;
+	var isList$1 = util.isList;
+	var isFunction$1 = util.isFunction;
+	var isObject$3 = util.isObject;
+	var storeEngine = {
+	  createStore: _createStore
+	};
+	var storeAPI = {
+	  version: '2.0.12',
+	  enabled: false,
+	  // get returns the value of the given key. If that value
+	  // is undefined, it returns optionalDefaultValue instead.
+	  get: function get(key, optionalDefaultValue) {
+	    var data = this.storage.read(this._namespacePrefix + key);
+	    return this._deserialize(data, optionalDefaultValue);
+	  },
+	  // set will store the given value at key and returns value.
+	  // Calling set with value === undefined is equivalent to calling remove.
+	  set: function set(key, value) {
+	    if (value === undefined) {
+	      return this.remove(key);
+	    }
+
+	    this.storage.write(this._namespacePrefix + key, this._serialize(value));
+	    return value;
+	  },
+	  // remove deletes the key and value stored at the given key.
+	  remove: function remove(key) {
+	    this.storage.remove(this._namespacePrefix + key);
+	  },
+	  // each will call the given callback once for each key-value pair
+	  // in this store.
+	  each: function each(callback) {
+	    var self = this;
+	    this.storage.each(function (val, namespacedKey) {
+	      callback.call(self, self._deserialize(val), (namespacedKey || '').replace(self._namespaceRegexp, ''));
+	    });
+	  },
+	  // clearAll will remove all the stored key-value pairs in this store.
+	  clearAll: function clearAll() {
+	    this.storage.clearAll();
+	  },
+	  // additional functionality that can't live in plugins
+	  // ---------------------------------------------------
+	  // hasNamespace returns true if this store instance has the given namespace.
+	  hasNamespace: function hasNamespace(namespace) {
+	    return this._namespacePrefix == '__storejs_' + namespace + '_';
+	  },
+	  // createStore creates a store.js instance with the first
+	  // functioning storage in the list of storage candidates,
+	  // and applies the the given mixins to the instance.
+	  createStore: function createStore() {
+	    return _createStore.apply(this, arguments);
+	  },
+	  addPlugin: function addPlugin(plugin) {
+	    this._addPlugin(plugin);
+	  },
+	  namespace: function namespace(_namespace) {
+	    return _createStore(this.storage, this.plugins, _namespace);
+	  }
+	};
 
-	    operation.id = 'extract';
-	    operation.keys = [_t('operations.extract.key')];
-	    operation.title = _t('operations.extract.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	function _warn() {
+	  var _console = typeof console == 'undefined' ? null : console;
 
+	  if (!_console) {
+	    return;
+	  }
 
-	    return operation;
+	  var fn = _console.warn ? _console.warn : _console.log;
+	  fn.apply(_console, arguments);
 	}
 
-	function operationMerge(context, selectedIDs) {
+	function _createStore(storages, plugins, namespace) {
+	  if (!namespace) {
+	    namespace = '';
+	  }
 
-	    var _action = getAction();
+	  if (storages && !isList$1(storages)) {
+	    storages = [storages];
+	  }
 
-	    function getAction() {
-	        // prefer a non-disabled action first
-	        var join = actionJoin(selectedIDs);
-	        if (!join.disabled(context.graph())) { return join; }
+	  if (plugins && !isList$1(plugins)) {
+	    plugins = [plugins];
+	  }
 
-	        var merge = actionMerge(selectedIDs);
-	        if (!merge.disabled(context.graph())) { return merge; }
+	  var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
+	  var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
+	  var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
 
-	        var mergePolygon = actionMergePolygon(selectedIDs);
-	        if (!mergePolygon.disabled(context.graph())) { return mergePolygon; }
+	  if (!legalNamespaces.test(namespace)) {
+	    throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
+	  }
 
-	        var mergeNodes = actionMergeNodes(selectedIDs);
-	        if (!mergeNodes.disabled(context.graph())) { return mergeNodes; }
+	  var _privateStoreProps = {
+	    _namespacePrefix: namespacePrefix,
+	    _namespaceRegexp: namespaceRegexp,
+	    _testStorage: function _testStorage(storage) {
+	      try {
+	        var testStr = '__storejs__test__';
+	        storage.write(testStr, testStr);
+	        var ok = storage.read(testStr) === testStr;
+	        storage.remove(testStr);
+	        return ok;
+	      } catch (e) {
+	        return false;
+	      }
+	    },
+	    _assignPluginFnProp: function _assignPluginFnProp(pluginFnProp, propName) {
+	      var oldFn = this[propName];
 
-	        // otherwise prefer an action with an interesting disabled reason
-	        if (join.disabled(context.graph()) !== 'not_eligible') { return join; }
-	        if (merge.disabled(context.graph()) !== 'not_eligible') { return merge; }
-	        if (mergePolygon.disabled(context.graph()) !== 'not_eligible') { return mergePolygon; }
+	      this[propName] = function pluginFn() {
+	        var args = slice$3(arguments, 0);
+	        var self = this; // super_fn calls the old function which was overwritten by
+	        // this mixin.
 
-	        return mergeNodes;
-	    }
+	        function super_fn() {
+	          if (!oldFn) {
+	            return;
+	          }
 
-	    var operation = function() {
+	          each$1(arguments, function (arg, i) {
+	            args[i] = arg;
+	          });
+	          return oldFn.apply(self, args);
+	        } // Give mixing function access to super_fn by prefixing all mixin function
+	        // arguments with super_fn.
 
-	        if (operation.disabled()) { return; }
 
-	        context.perform(_action, operation.annotation());
+	        var newFnArgs = [super_fn].concat(args);
+	        return pluginFnProp.apply(self, newFnArgs);
+	      };
+	    },
+	    _serialize: function _serialize(obj) {
+	      return JSON.stringify(obj);
+	    },
+	    _deserialize: function _deserialize(strVal, defaultVal) {
+	      if (!strVal) {
+	        return defaultVal;
+	      } // It is possible that a raw string value has been previously stored
+	      // in a storage without using store.js, meaning it will be a raw
+	      // string value instead of a JSON serialized string. By defaulting
+	      // to the raw string value in case of a JSON parse error, we allow
+	      // for past stored values to be forwards-compatible with store.js
 
-	        context.validator().validate();
 
-	        var resultIDs = selectedIDs.filter(context.hasEntity);
-	        if (resultIDs.length > 1) {
-	            var interestingIDs = resultIDs.filter(function(id) {
-	                return context.entity(id).hasInterestingTags();
-	            });
-	            if (interestingIDs.length) { resultIDs = interestingIDs; }
-	        }
-	        context.enter(modeSelect(context, resultIDs));
-	    };
+	      var val = '';
 
-	    operation.available = function() {
-	        return selectedIDs.length >= 2;
-	    };
+	      try {
+	        val = JSON.parse(strVal);
+	      } catch (e) {
+	        val = strVal;
+	      }
 
-	    operation.disabled = function() {
-	        var actionDisabled = _action.disabled(context.graph());
-	        if (actionDisabled) { return actionDisabled; }
+	      return val !== undefined ? val : defaultVal;
+	    },
+	    _addStorage: function _addStorage(storage) {
+	      if (this.enabled) {
+	        return;
+	      }
 
-	        var osm = context.connection();
-	        if (osm &&
-	            _action.resultingWayNodesLength &&
-	            _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
-	            return 'too_many_vertices';
-	        }
+	      if (this._testStorage(storage)) {
+	        this.storage = storage;
+	        this.enabled = true;
+	      }
+	    },
+	    _addPlugin: function _addPlugin(plugin) {
+	      var self = this; // If the plugin is an array, then add all plugins in the array.
+	      // This allows for a plugin to depend on other plugins.
 
-	        return false;
-	    };
+	      if (isList$1(plugin)) {
+	        each$1(plugin, function (plugin) {
+	          self._addPlugin(plugin);
+	        });
+	        return;
+	      } // Keep track of all plugins we've seen so far, so that we
+	      // don't add any of them twice.
 
-	    operation.tooltip = function() {
-	        var disabled = operation.disabled();
-	        if (disabled) {
-	            if (disabled === 'restriction') {
-	                return _t('operations.merge.restriction',
-	                    { relation: _mainPresetIndex.item('type/restriction').name() });
-	            }
-	            return _t('operations.merge.' + disabled);
-	        }
-	        return _t('operations.merge.description');
-	    };
 
-	    operation.annotation = function() {
-	        return _t('operations.merge.annotation', { n: selectedIDs.length });
-	    };
+	      var seenPlugin = pluck$1(this.plugins, function (seenPlugin) {
+	        return plugin === seenPlugin;
+	      });
 
-	    operation.id = 'merge';
-	    operation.keys = [_t('operations.merge.key')];
-	    operation.title = _t('operations.merge.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	      if (seenPlugin) {
+	        return;
+	      }
 
-	    return operation;
-	}
+	      this.plugins.push(plugin); // Check that the plugin is properly formed
 
-	// see also `behaviorPaste`
-	function operationPaste(context) {
+	      if (!isFunction$1(plugin)) {
+	        throw new Error('Plugins must be function values that return objects');
+	      }
 
-	    var _pastePoint;
+	      var pluginProperties = plugin.call(this);
 
-	    var operation = function() {
+	      if (!isObject$3(pluginProperties)) {
+	        throw new Error('Plugins must return an object of function properties');
+	      } // Add the plugin function properties to this store instance.
 
-	        if (!_pastePoint) { return; }
 
-	        var oldIDs = context.copyIDs();
-	        if (!oldIDs.length) { return; }
+	      each$1(pluginProperties, function (pluginFnProp, propName) {
+	        if (!isFunction$1(pluginFnProp)) {
+	          throw new Error('Bad plugin property: ' + propName + ' from plugin ' + plugin.name + '. Plugins should only return functions.');
+	        }
 
-	        var projection = context.projection;
-	        var extent = geoExtent();
-	        var oldGraph = context.copyGraph();
-	        var newIDs = [];
+	        self._assignPluginFnProp(pluginFnProp, propName);
+	      });
+	    },
+	    // Put deprecated properties in the private API, so as to not expose it to accidential
+	    // discovery through inspection of the store object.
+	    // Deprecated: addStorage
+	    addStorage: function addStorage(storage) {
+	      _warn('store.addStorage(storage) is deprecated. Use createStore([storages])');
 
-	        var action = actionCopyEntities(oldIDs, oldGraph);
-	        context.perform(action);
+	      this._addStorage(storage);
+	    }
+	  };
+	  var store = create$2(_privateStoreProps, storeAPI, {
+	    plugins: []
+	  });
+	  store.raw = {};
+	  each$1(store, function (prop, propName) {
+	    if (isFunction$1(prop)) {
+	      store.raw[propName] = bind$2(store, prop);
+	    }
+	  });
+	  each$1(storages, function (storage) {
+	    store._addStorage(storage);
+	  });
+	  each$1(plugins, function (plugin) {
+	    store._addPlugin(plugin);
+	  });
+	  return store;
+	}
 
-	        var copies = action.copies();
-	        var originals = new Set();
-	        Object.values(copies).forEach(function(entity) { originals.add(entity.id); });
+	var Global$1 = util.Global;
+	var localStorage_1 = {
+	  name: 'localStorage',
+	  read: read,
+	  write: write,
+	  each: each$2,
+	  remove: remove$2,
+	  clearAll: clearAll
+	};
 
-	        for (var id in copies) {
-	            var oldEntity = oldGraph.entity(id);
-	            var newEntity = copies[id];
+	function localStorage$1() {
+	  return Global$1.localStorage;
+	}
 
-	            extent._extend(oldEntity.extent(oldGraph));
+	function read(key) {
+	  return localStorage$1().getItem(key);
+	}
 
-	            // Exclude child nodes from newIDs if their parent way was also copied.
-	            var parents = context.graph().parentWays(newEntity);
-	            var parentCopied = parents.some(function(parent) {
-	                return originals.has(parent.id);
-	            });
+	function write(key, data) {
+	  return localStorage$1().setItem(key, data);
+	}
 
-	            if (!parentCopied) {
-	                newIDs.push(newEntity.id);
-	            }
-	        }
+	function each$2(fn) {
+	  for (var i = localStorage$1().length - 1; i >= 0; i--) {
+	    var key = localStorage$1().key(i);
+	    fn(read(key), key);
+	  }
+	}
 
-	        // Use the location of the copy operation to offset the paste location,
-	        // or else use the center of the pasted extent
-	        var copyPoint = (context.copyLonLat() && projection(context.copyLonLat())) ||
-	            projection(extent.center());
-	        var delta = geoVecSubtract(_pastePoint, copyPoint);
+	function remove$2(key) {
+	  return localStorage$1().removeItem(key);
+	}
 
-	        // Move the pasted objects to be anchored at the paste location
-	        context.replace(actionMove(newIDs, delta, projection), operation.annotation());
-	        context.enter(modeSelect(context, newIDs));
-	    };
+	function clearAll() {
+	  return localStorage$1().clear();
+	}
 
-	    operation.point = function(val) {
-	        _pastePoint = val;
-	        return operation;
-	    };
+	// versions 6 and 7, where no localStorage, etc
+	// is available.
 
-	    operation.available = function() {
-	        return context.mode().id === 'browse';
-	    };
+	var Global$2 = util.Global;
+	var oldFFGlobalStorage = {
+	  name: 'oldFF-globalStorage',
+	  read: read$1,
+	  write: write$1,
+	  each: each$3,
+	  remove: remove$3,
+	  clearAll: clearAll$1
+	};
+	var globalStorage = Global$2.globalStorage;
 
-	    operation.disabled = function() {
-	        return !context.copyIDs().length;
-	    };
+	function read$1(key) {
+	  return globalStorage[key];
+	}
 
-	    operation.tooltip = function() {
-	        var oldGraph = context.copyGraph();
-	        var ids = context.copyIDs();
-	        if (!ids.length) {
-	            return _t('operations.paste.nothing_copied');
-	        }
-	        return ids.length === 1 ?
-	            _t('operations.paste.description.single', { feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph) }) :
-	            _t('operations.paste.description.multiple', { n: ids.length.toString() });
-	    };
+	function write$1(key, data) {
+	  globalStorage[key] = data;
+	}
 
-	    operation.annotation = function() {
-	        var ids = context.copyIDs();
-	        return ids.length === 1 ?
-	            _t('operations.paste.annotation.single') :
-	            _t('operations.paste.annotation.multiple', { n: ids.length.toString() });
-	    };
+	function each$3(fn) {
+	  for (var i = globalStorage.length - 1; i >= 0; i--) {
+	    var key = globalStorage.key(i);
+	    fn(globalStorage[key], key);
+	  }
+	}
 
-	    operation.id = 'paste';
-	    operation.keys = [uiCmd('⌘V')];
-	    operation.title = _t('operations.paste.title');
+	function remove$3(key) {
+	  return globalStorage.removeItem(key);
+	}
 
-	    return operation;
+	function clearAll$1() {
+	  each$3(function (key, _) {
+	    delete globalStorage[key];
+	  });
 	}
 
-	function operationReverse(context, selectedIDs) {
+	// versions 6 and 7, where no localStorage, sessionStorage, etc
+	// is available.
 
-	    var operation = function() {
-	        context.perform(function combinedReverseAction(graph) {
-	            actions().forEach(function(action) {
-	                graph = action(graph);
-	            });
-	            return graph;
-	        }, operation.annotation());
-	        context.validator().validate();
-	    };
+	var Global$3 = util.Global;
+	var oldIEUserDataStorage = {
+	  name: 'oldIE-userDataStorage',
+	  write: write$2,
+	  read: read$2,
+	  each: each$4,
+	  remove: remove$4,
+	  clearAll: clearAll$2
+	};
+	var storageName = 'storejs';
+	var doc = Global$3.document;
 
-	    function actions(situation) {
-	        return selectedIDs.map(function(entityID) {
-	            var entity = context.hasEntity(entityID);
-	            if (!entity) { return; }
+	var _withStorageEl = _makeIEStorageElFunction();
 
-	            if (situation === 'toolbar') {
-	                if (entity.type === 'way' &&
-	                    (!entity.isOneWay() && !entity.isSided())) { return; }
-	            }
+	var disable = (Global$3.navigator ? Global$3.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
 
-	            var geometry = entity.geometry(context.graph());
-	            if (entity.type !== 'node' && geometry !== 'line') { return; }
+	function write$2(unfixedKey, data) {
+	  if (disable) {
+	    return;
+	  }
 
-	            var action = actionReverse(entityID);
-	            if (action.disabled(context.graph())) { return; }
+	  var fixedKey = fixKey(unfixedKey);
 
-	            return action;
-	        }).filter(Boolean);
-	    }
+	  _withStorageEl(function (storageEl) {
+	    storageEl.setAttribute(fixedKey, data);
+	    storageEl.save(storageName);
+	  });
+	}
 
-	    function reverseTypeID() {
-	        var acts = actions();
-	        var nodeActionCount = acts.filter(function(act) {
-	            var entity = context.hasEntity(act.entityID());
-	            return entity && entity.type === 'node';
-	        }).length;
-	        var typeID = nodeActionCount === 0 ? 'line' : (nodeActionCount === acts.length ? 'point' : 'features');
-	        if (typeID !== 'features' && acts.length > 1) { typeID += 's'; }
-	        return typeID;
-	    }
+	function read$2(unfixedKey) {
+	  if (disable) {
+	    return;
+	  }
 
+	  var fixedKey = fixKey(unfixedKey);
+	  var res = null;
 
-	    operation.available = function(situation) {
-	        return actions(situation).length > 0;
-	    };
+	  _withStorageEl(function (storageEl) {
+	    res = storageEl.getAttribute(fixedKey);
+	  });
 
+	  return res;
+	}
 
-	    operation.disabled = function() {
-	        return false;
-	    };
+	function each$4(callback) {
+	  _withStorageEl(function (storageEl) {
+	    var attributes = storageEl.XMLDocument.documentElement.attributes;
 
+	    for (var i = attributes.length - 1; i >= 0; i--) {
+	      var attr = attributes[i];
+	      callback(storageEl.getAttribute(attr.name), attr.name);
+	    }
+	  });
+	}
 
-	    operation.tooltip = function() {
-	        return _t('operations.reverse.description.' + reverseTypeID());
-	    };
+	function remove$4(unfixedKey) {
+	  var fixedKey = fixKey(unfixedKey);
 
+	  _withStorageEl(function (storageEl) {
+	    storageEl.removeAttribute(fixedKey);
+	    storageEl.save(storageName);
+	  });
+	}
 
-	    operation.annotation = function() {
-	        return _t('operations.reverse.annotation.' + reverseTypeID());
-	    };
+	function clearAll$2() {
+	  _withStorageEl(function (storageEl) {
+	    var attributes = storageEl.XMLDocument.documentElement.attributes;
+	    storageEl.load(storageName);
 
+	    for (var i = attributes.length - 1; i >= 0; i--) {
+	      storageEl.removeAttribute(attributes[i].name);
+	    }
 
-	    operation.id = 'reverse';
-	    operation.keys = [_t('operations.reverse.key')];
-	    operation.title = _t('operations.reverse.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	    storageEl.save(storageName);
+	  });
+	} // Helpers
+	//////////
+	// In IE7, keys cannot start with a digit or contain certain chars.
+	// See https://github.com/marcuswestin/store.js/issues/40
+	// See https://github.com/marcuswestin/store.js/issues/83
 
-	    return operation;
-	}
 
-	function operationSplit(context, selectedIDs) {
-	    var vertices = selectedIDs
-	        .filter(function(id) { return context.graph().geometry(id) === 'vertex'; });
-	    var entityID = vertices[0];
-	    var action = actionSplit(entityID);
-	    var ways = [];
+	var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
 
-	    if (vertices.length === 1) {
-	        if (entityID && selectedIDs.length > 1) {
-	            var ids = selectedIDs.filter(function(id) { return id !== entityID; });
-	            action.limitWays(ids);
-	        }
-	        ways = action.ways(context.graph());
-	    }
+	function fixKey(key) {
+	  return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
+	}
 
+	function _makeIEStorageElFunction() {
+	  if (!doc || !doc.documentElement || !doc.documentElement.addBehavior) {
+	    return null;
+	  }
 
-	    var operation = function() {
-	        var difference = context.perform(action, operation.annotation());
-	        context.enter(modeSelect(context, difference.extantIDs()));
-	    };
+	  var scriptTag = 'script',
+	      storageOwner,
+	      storageContainer,
+	      storageEl; // Since #userData storage applies only to specific paths, we need to
+	  // somehow link our data to a specific path.  We choose /favicon.ico
+	  // as a pretty safe option, since all browsers already make a request to
+	  // this URL anyway and being a 404 will not hurt us here.  We wrap an
+	  // iframe pointing to the favicon in an ActiveXObject(htmlfile) object
+	  // (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
+	  // since the iframe access rules appear to allow direct access and
+	  // manipulation of the document element, even for a 404 page.  This
+	  // document can be used instead of the current document (which would
+	  // have been limited to the current path) to perform #userData storage.
 
+	  try {
+	    /* global ActiveXObject */
+	    storageContainer = new ActiveXObject('htmlfile');
+	    storageContainer.open();
+	    storageContainer.write('<' + scriptTag + '>document.w=window</' + scriptTag + '><iframe src="/favicon.ico"></iframe>');
+	    storageContainer.close();
+	    storageOwner = storageContainer.w.frames[0].document;
+	    storageEl = storageOwner.createElement('div');
+	  } catch (e) {
+	    // somehow ActiveXObject instantiation failed (perhaps some special
+	    // security settings or otherwse), fall back to per-path storage
+	    storageEl = doc.createElement('div');
+	    storageOwner = doc.body;
+	  }
+
+	  return function (storeFunction) {
+	    var args = [].slice.call(arguments, 0);
+	    args.unshift(storageEl); // See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
+	    // and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
+
+	    storageOwner.appendChild(storageEl);
+	    storageEl.addBehavior('#default#userData');
+	    storageEl.load(storageName);
+	    storeFunction.apply(this, args);
+	    storageOwner.removeChild(storageEl);
+	    return;
+	  };
+	}
 
-	    operation.available = function() {
-	        return vertices.length === 1;
-	    };
+	// doesn't work but cookies do. This implementation is adopted from
+	// https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
 
+	var Global$4 = util.Global;
+	var trim$4 = util.trim;
+	var cookieStorage = {
+	  name: 'cookieStorage',
+	  read: read$3,
+	  write: write$3,
+	  each: each$5,
+	  remove: remove$5,
+	  clearAll: clearAll$3
+	};
+	var doc$1 = Global$4.document;
 
-	    operation.disabled = function() {
-	        var reason = action.disabled(context.graph());
-	        if (reason) {
-	            return reason;
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
+	function read$3(key) {
+	  if (!key || !_has(key)) {
+	    return null;
+	  }
 
-	        return false;
-	    };
+	  var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
+	  return unescape(doc$1.cookie.replace(new RegExp(regexpStr), "$1"));
+	}
 
+	function each$5(callback) {
+	  var cookies = doc$1.cookie.split(/; ?/g);
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        if (disable) {
-	            return _t('operations.split.' + disable);
-	        } else if (ways.length === 1) {
-	            return _t('operations.split.description.' + context.graph().geometry(ways[0].id));
-	        } else {
-	            return _t('operations.split.description.multiple');
-	        }
-	    };
+	  for (var i = cookies.length - 1; i >= 0; i--) {
+	    if (!trim$4(cookies[i])) {
+	      continue;
+	    }
 
+	    var kvp = cookies[i].split('=');
+	    var key = unescape(kvp[0]);
+	    var val = unescape(kvp[1]);
+	    callback(val, key);
+	  }
+	}
 
-	    operation.annotation = function() {
-	        return ways.length === 1 ?
-	            _t('operations.split.annotation.' + context.graph().geometry(ways[0].id)) :
-	            _t('operations.split.annotation.multiple', { n: ways.length });
-	    };
+	function write$3(key, data) {
+	  if (!key) {
+	    return;
+	  }
 
+	  doc$1.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
+	}
 
-	    operation.id = 'split';
-	    operation.keys = [_t('operations.split.key')];
-	    operation.title = _t('operations.split.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	function remove$5(key) {
+	  if (!key || !_has(key)) {
+	    return;
+	  }
 
-	    return operation;
+	  doc$1.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
 	}
 
-	function operationStraighten(context, selectedIDs) {
-	    var _wayIDs = selectedIDs.filter(function(id) { return id.charAt(0) === 'w'; });
-	    var _nodeIDs = selectedIDs.filter(function(id) { return id.charAt(0) === 'n'; });
-	    var _amount = ((_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple');
-
-	    var _nodes = utilGetAllNodes(selectedIDs, context.graph());
-	    var _coords = _nodes.map(function(n) { return n.loc; });
-	    var _extent = utilTotalExtent(selectedIDs, context.graph());
-	    var _action = chooseAction();
-	    var _geometry;
-
-
-	    function chooseAction() {
-	        // straighten selected nodes
-	        if (_wayIDs.length === 0 && _nodeIDs.length > 2) {
-	            _geometry = 'points';
-	            return actionStraightenNodes(_nodeIDs, context.projection);
-
-	        // straighten selected ways (possibly between range of 2 selected nodes)
-	        } else if (_wayIDs.length > 0 && (_nodeIDs.length === 0 || _nodeIDs.length === 2)) {
-	            var startNodeIDs = [];
-	            var endNodeIDs = [];
-
-	            for (var i = 0; i < selectedIDs.length; i++) {
-	                var entity = context.entity(selectedIDs[i]);
-	                if (entity.type === 'node') {
-	                    continue;
-	                } else if (entity.type !== 'way' || entity.isClosed()) {
-	                    return null;  // exit early, can't straighten these
-	                }
+	function clearAll$3() {
+	  each$5(function (_, key) {
+	    remove$5(key);
+	  });
+	}
 
-	                startNodeIDs.push(entity.first());
-	                endNodeIDs.push(entity.last());
-	            }
+	function _has(key) {
+	  return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc$1.cookie);
+	}
 
-	            // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
-	            startNodeIDs = startNodeIDs.filter(function(n) {
-	                return startNodeIDs.indexOf(n) === startNodeIDs.lastIndexOf(n);
-	            });
-	            endNodeIDs = endNodeIDs.filter(function(n) {
-	                return endNodeIDs.indexOf(n) === endNodeIDs.lastIndexOf(n);
-	            });
+	var Global$5 = util.Global;
+	var sessionStorage_1 = {
+	  name: 'sessionStorage',
+	  read: read$4,
+	  write: write$4,
+	  each: each$6,
+	  remove: remove$6,
+	  clearAll: clearAll$4
+	};
 
-	            // Ensure all ways are connected (i.e. only 2 unique endpoints/startpoints)
-	            if (utilArrayDifference(startNodeIDs, endNodeIDs).length +
-	                utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) { return null; }
+	function sessionStorage() {
+	  return Global$5.sessionStorage;
+	}
 
-	            // Ensure path contains at least 3 unique nodes
-	            var wayNodeIDs = utilGetAllNodes(_wayIDs, context.graph())
-	                .map(function(node) { return node.id; });
-	            if (wayNodeIDs.length <= 2) { return null; }
+	function read$4(key) {
+	  return sessionStorage().getItem(key);
+	}
 
-	            // If range of 2 selected nodes is supplied, ensure nodes lie on the selected path
-	            if (_nodeIDs.length === 2 && (
-	                wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1
-	            )) { return null; }
+	function write$4(key, data) {
+	  return sessionStorage().setItem(key, data);
+	}
 
-	            if (_nodeIDs.length) {
-	                // If we're only straightenting between two points, we only need that extent visible
-	                _extent = utilTotalExtent(_nodeIDs, context.graph());
-	            }
+	function each$6(fn) {
+	  for (var i = sessionStorage().length - 1; i >= 0; i--) {
+	    var key = sessionStorage().key(i);
+	    fn(read$4(key), key);
+	  }
+	}
 
-	            _geometry = _wayIDs.length === 1 ? 'line' : 'lines';
-	            return actionStraightenWay(selectedIDs, context.projection);
-	        }
+	function remove$6(key) {
+	  return sessionStorage().removeItem(key);
+	}
 
-	        return null;
-	    }
+	function clearAll$4() {
+	  return sessionStorage().clear();
+	}
 
+	// memoryStorage is a useful last fallback to ensure that the store
+	// is functions (meaning store.get(), store.set(), etc will all function).
+	// However, stored values will not persist when the browser navigates to
+	// a new page or reloads the current page.
+	var memoryStorage_1 = {
+	  name: 'memoryStorage',
+	  read: read$5,
+	  write: write$5,
+	  each: each$7,
+	  remove: remove$7,
+	  clearAll: clearAll$5
+	};
+	var memoryStorage = {};
 
-	    function operation() {
-	        if (!_action) { return; }
+	function read$5(key) {
+	  return memoryStorage[key];
+	}
 
-	        context.perform(_action, operation.annotation());
+	function write$5(key, data) {
+	  memoryStorage[key] = data;
+	}
 
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
+	function each$7(callback) {
+	  for (var key in memoryStorage) {
+	    if (memoryStorage.hasOwnProperty(key)) {
+	      callback(memoryStorage[key], key);
 	    }
+	  }
+	}
 
+	function remove$7(key) {
+	  delete memoryStorage[key];
+	}
 
-	    operation.available = function() {
-	        return Boolean(_action);
-	    };
+	function clearAll$5(key) {
+	  memoryStorage = {};
+	}
 
+	var all = [// Listed in order of usage preference
+	localStorage_1, oldFFGlobalStorage, oldIEUserDataStorage, cookieStorage, sessionStorage_1, memoryStorage_1];
 
-	    operation.disabled = function() {
-	        var reason = _action.disabled(context.graph());
-	        if (reason) {
-	            return reason;
-	        } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        } else if (someMissing()) {
-	            return 'not_downloaded';
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
+	/* eslint-disable */
+	//  json2.js
+	//  2016-10-28
+	//  Public Domain.
+	//  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
+	//  See http://www.JSON.org/js.html
+	//  This code should be minified before deployment.
+	//  See http://javascript.crockford.com/jsmin.html
+	//  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
+	//  NOT CONTROL.
+	//  This file creates a global JSON object containing two methods: stringify
+	//  and parse. This file provides the ES5 JSON capability to ES3 systems.
+	//  If a project might run on IE8 or earlier, then this file should be included.
+	//  This file does nothing on ES5 systems.
+	//      JSON.stringify(value, replacer, space)
+	//          value       any JavaScript value, usually an object or array.
+	//          replacer    an optional parameter that determines how object
+	//                      values are stringified for objects. It can be a
+	//                      function or an array of strings.
+	//          space       an optional parameter that specifies the indentation
+	//                      of nested structures. If it is omitted, the text will
+	//                      be packed without extra whitespace. If it is a number,
+	//                      it will specify the number of spaces to indent at each
+	//                      level. If it is a string (such as "\t" or "&nbsp;"),
+	//                      it contains the characters used to indent at each level.
+	//          This method produces a JSON text from a JavaScript value.
+	//          When an object value is found, if the object contains a toJSON
+	//          method, its toJSON method will be called and the result will be
+	//          stringified. A toJSON method does not serialize: it returns the
+	//          value represented by the name/value pair that should be serialized,
+	//          or undefined if nothing should be serialized. The toJSON method
+	//          will be passed the key associated with the value, and this will be
+	//          bound to the value.
+	//          For example, this would serialize Dates as ISO strings.
+	//              Date.prototype.toJSON = function (key) {
+	//                  function f(n) {
+	//                      // Format integers to have at least two digits.
+	//                      return (n < 10)
+	//                          ? "0" + n
+	//                          : n;
+	//                  }
+	//                  return this.getUTCFullYear()   + "-" +
+	//                       f(this.getUTCMonth() + 1) + "-" +
+	//                       f(this.getUTCDate())      + "T" +
+	//                       f(this.getUTCHours())     + ":" +
+	//                       f(this.getUTCMinutes())   + ":" +
+	//                       f(this.getUTCSeconds())   + "Z";
+	//              };
+	//          You can provide an optional replacer method. It will be passed the
+	//          key and value of each member, with this bound to the containing
+	//          object. The value that is returned from your method will be
+	//          serialized. If your method returns undefined, then the member will
+	//          be excluded from the serialization.
+	//          If the replacer parameter is an array of strings, then it will be
+	//          used to select the members to be serialized. It filters the results
+	//          such that only members with keys listed in the replacer array are
+	//          stringified.
+	//          Values that do not have JSON representations, such as undefined or
+	//          functions, will not be serialized. Such values in objects will be
+	//          dropped; in arrays they will be replaced with null. You can use
+	//          a replacer function to replace those with JSON values.
+	//          JSON.stringify(undefined) returns undefined.
+	//          The optional space parameter produces a stringification of the
+	//          value that is filled with line breaks and indentation to make it
+	//          easier to read.
+	//          If the space parameter is a non-empty string, then that string will
+	//          be used for indentation. If the space parameter is a number, then
+	//          the indentation will be that many spaces.
+	//          Example:
+	//          text = JSON.stringify(["e", {pluribus: "unum"}]);
+	//          // text is '["e",{"pluribus":"unum"}]'
+	//          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
+	//          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+	//          text = JSON.stringify([new Date()], function (key, value) {
+	//              return this[key] instanceof Date
+	//                  ? "Date(" + this[key] + ")"
+	//                  : value;
+	//          });
+	//          // text is '["Date(---current time---)"]'
+	//      JSON.parse(text, reviver)
+	//          This method parses a JSON text to produce an object or array.
+	//          It can throw a SyntaxError exception.
+	//          The optional reviver parameter is a function that can filter and
+	//          transform the results. It receives each of the keys and values,
+	//          and its return value is used instead of the original value.
+	//          If it returns what it received, then the structure is not modified.
+	//          If it returns undefined then the member is deleted.
+	//          Example:
+	//          // Parse the text. Values that look like ISO date strings will
+	//          // be converted to Date objects.
+	//          myData = JSON.parse(text, function (key, value) {
+	//              var a;
+	//              if (typeof value === "string") {
+	//                  a =
+	//   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
+	//                  if (a) {
+	//                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+	//                          +a[5], +a[6]));
+	//                  }
+	//              }
+	//              return value;
+	//          });
+	//          myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
+	//              var d;
+	//              if (typeof value === "string" &&
+	//                      value.slice(0, 5) === "Date(" &&
+	//                      value.slice(-1) === ")") {
+	//                  d = new Date(value.slice(5, -1));
+	//                  if (d) {
+	//                      return d;
+	//                  }
+	//              }
+	//              return value;
+	//          });
+	//  This is a reference implementation. You are free to copy, modify, or
+	//  redistribute.
 
-	        return false;
+	/*jslint
+	    eval, for, this
+	*/
 
+	/*property
+	    JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
+	    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
+	    lastIndex, length, parse, prototype, push, replace, slice, stringify,
+	    test, toJSON, toString, valueOf
+	*/
+	// Create a JSON object only if one does not already exist. We create the
+	// methods in a closure to avoid creating global variables.
+	if ((typeof JSON === "undefined" ? "undefined" : _typeof(JSON)) !== "object") {
+	  JSON = {};
+	}
 
-	        function someMissing() {
-	            if (context.inIntro()) { return false; }
-	            var osm = context.connection();
-	            if (osm) {
-	                var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-	                if (missing.length) {
-	                    missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
-	    };
+	(function () {
 
+	  var rx_one = /^[\],:{}\s]*$/;
+	  var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
+	  var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
+	  var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
+	  var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+	  var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.straighten.' + disable + '.' + _amount) :
-	            _t('operations.straighten.description.' + _geometry);
-	    };
+	  function f(n) {
+	    // Format integers to have at least two digits.
+	    return n < 10 ? "0" + n : n;
+	  }
 
+	  function this_value() {
+	    return this.valueOf();
+	  }
 
-	    operation.annotation = function() {
-	        return _t('operations.straighten.annotation.' + _geometry);
+	  if (typeof Date.prototype.toJSON !== "function") {
+	    Date.prototype.toJSON = function () {
+	      return isFinite(this.valueOf()) ? this.getUTCFullYear() + "-" + f(this.getUTCMonth() + 1) + "-" + f(this.getUTCDate()) + "T" + f(this.getUTCHours()) + ":" + f(this.getUTCMinutes()) + ":" + f(this.getUTCSeconds()) + "Z" : null;
 	    };
 
+	    Boolean.prototype.toJSON = this_value;
+	    Number.prototype.toJSON = this_value;
+	    String.prototype.toJSON = this_value;
+	  }
 
-	    operation.id = 'straighten';
-	    operation.keys = [_t('operations.straighten.key')];
-	    operation.title = _t('operations.straighten.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
-
-	    return operation;
-	}
+	  var gap;
+	  var indent;
+	  var meta;
+	  var rep;
 
-	var Operations = /*#__PURE__*/Object.freeze({
-		__proto__: null,
-		operationCircularize: operationCircularize,
-		operationContinue: operationContinue,
-		operationCopy: operationCopy,
-		operationDelete: operationDelete,
-		operationDisconnect: operationDisconnect,
-		operationDowngrade: operationDowngrade,
-		operationExtract: operationExtract,
-		operationMerge: operationMerge,
-		operationMove: operationMove,
-		operationOrthogonalize: operationOrthogonalize,
-		operationPaste: operationPaste,
-		operationReflectShort: operationReflectShort,
-		operationReflectLong: operationReflectLong,
-		operationReverse: operationReverse,
-		operationRotate: operationRotate,
-		operationSplit: operationSplit,
-		operationStraighten: operationStraighten
-	});
+	  function quote(string) {
+	    // If the string contains no control characters, no quote characters, and no
+	    // backslash characters, then we can safely slap some quotes around it.
+	    // Otherwise we must also replace the offending characters with safe escape
+	    // sequences.
+	    rx_escapable.lastIndex = 0;
+	    return rx_escapable.test(string) ? "\"" + string.replace(rx_escapable, function (a) {
+	      var c = meta[a];
+	      return typeof c === "string" ? c : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
+	    }) + "\"" : "\"" + string + "\"";
+	  }
 
-	var _relatedParent;
+	  function str(key, holder) {
+	    // Produce a string from holder[key].
+	    var i; // The loop counter.
 
+	    var k; // The member key.
 
-	function modeSelect(context, selectedIDs) {
-	    var mode = {
-	        id: 'select',
-	        button: 'browse'
-	    };
+	    var v; // The member value.
 
-	    var keybinding = utilKeybinding('select');
+	    var length;
+	    var mind = gap;
+	    var partial;
+	    var value = holder[key]; // If the value has a toJSON method, call it to obtain a replacement value.
 
-	    var _breatheBehavior = behaviorBreathe();
-	    var _modeDragNode = modeDragNode(context);
-	    var _selectBehavior;
-	    var _behaviors = [];
+	    if (value && _typeof(value) === "object" && typeof value.toJSON === "function") {
+	      value = value.toJSON(key);
+	    } // If we were called with a replacer function, then call the replacer to
+	    // obtain a replacement value.
 
-	    var _operations = [];
-	    var _newFeature = false;
-	    var _follow = false;
 
+	    if (typeof rep === "function") {
+	      value = rep.call(holder, key, value);
+	    } // What happens next depends on the value's type.
 
-	    function singular() {
-	        if (selectedIDs && selectedIDs.length === 1) {
-	            return context.hasEntity(selectedIDs[0]);
-	        }
-	    }
 
-	    function selectedEntities() {
-	        return selectedIDs.map(function(id) {
-	            return context.hasEntity(id);
-	        }).filter(Boolean);
-	    }
+	    switch (_typeof(value)) {
+	      case "string":
+	        return quote(value);
 
+	      case "number":
+	        // JSON numbers must be finite. Encode non-finite numbers as null.
+	        return isFinite(value) ? String(value) : "null";
 
-	    function checkSelectedIDs() {
-	        var ids = [];
-	        if (Array.isArray(selectedIDs)) {
-	            ids = selectedIDs.filter(function(id) {
-	                return context.hasEntity(id);
-	            });
-	        }
+	      case "boolean":
+	      case "null":
+	        // If the value is a boolean or null, convert it to a string. Note:
+	        // typeof null does not produce "null". The case is included here in
+	        // the remote chance that this gets fixed someday.
+	        return String(value);
+	      // If the type is "object", we might be dealing with an object or an array or
+	      // null.
 
-	        if (!ids.length) {
-	            context.enter(modeBrowse(context));
-	            return false;
-	        } else if ((selectedIDs.length > 1 && ids.length === 1) ||
-	            (selectedIDs.length === 1 && ids.length > 1)) {
-	            // switch between single- and multi-select UI
-	            context.enter(modeSelect(context, ids));
-	            return false;
-	        }
+	      case "object":
+	        // Due to a specification blunder in ECMAScript, typeof null is "object",
+	        // so watch out for that case.
+	        if (!value) {
+	          return "null";
+	        } // Make an array to hold the partial results of stringifying this object value.
 
-	        selectedIDs = ids;
-	        return true;
-	    }
 
+	        gap += indent;
+	        partial = []; // Is the value an array?
 
-	    // find the common parent ways for nextVertex, previousVertex
-	    function commonParents() {
-	        var graph = context.graph();
-	        var commonParents = [];
+	        if (Object.prototype.toString.apply(value) === "[object Array]") {
+	          // The value is an array. Stringify every element. Use null as a placeholder
+	          // for non-JSON values.
+	          length = value.length;
 
-	        for (var i = 0; i < selectedIDs.length; i++) {
-	            var entity = context.hasEntity(selectedIDs[i]);
-	            if (!entity || entity.geometry(graph) !== 'vertex') {
-	                return [];  // selection includes some not vertexes
-	            }
+	          for (i = 0; i < length; i += 1) {
+	            partial[i] = str(i, value) || "null";
+	          } // Join all of the elements together, separated with commas, and wrap them in
+	          // brackets.
 
-	            var currParents = graph.parentWays(entity).map(function(w) { return w.id; });
-	            if (!commonParents.length) {
-	                commonParents = currParents;
-	                continue;
-	            }
 
-	            commonParents = utilArrayIntersection(commonParents, currParents);
-	            if (!commonParents.length) {
-	                return [];
-	            }
-	        }
+	          v = partial.length === 0 ? "[]" : gap ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]" : "[" + partial.join(",") + "]";
+	          gap = mind;
+	          return v;
+	        } // If the replacer is an array, use it to select the members to be stringified.
 
-	        return commonParents;
-	    }
 
+	        if (rep && _typeof(rep) === "object") {
+	          length = rep.length;
 
-	    function singularParent() {
-	        var parents = commonParents();
-	        if (!parents || parents.length === 0) {
-	            _relatedParent = null;
-	            return null;
-	        }
+	          for (i = 0; i < length; i += 1) {
+	            if (typeof rep[i] === "string") {
+	              k = rep[i];
+	              v = str(k, value);
 
-	        // relatedParent is used when we visit a vertex with multiple
-	        // parents, and we want to remember which parent line we started on.
+	              if (v) {
+	                partial.push(quote(k) + (gap ? ": " : ":") + v);
+	              }
+	            }
+	          }
+	        } else {
+	          // Otherwise, iterate through all of the keys in the object.
+	          for (k in value) {
+	            if (Object.prototype.hasOwnProperty.call(value, k)) {
+	              v = str(k, value);
 
-	        if (parents.length === 1) {
-	            _relatedParent = parents[0];  // remember this parent for later
-	            return _relatedParent;
-	        }
+	              if (v) {
+	                partial.push(quote(k) + (gap ? ": " : ":") + v);
+	              }
+	            }
+	          }
+	        } // Join all of the member texts together, separated with commas,
+	        // and wrap them in braces.
 
-	        if (parents.indexOf(_relatedParent) !== -1) {
-	            return _relatedParent;   // prefer the previously seen parent
-	        }
 
-	        return parents[0];
+	        v = partial.length === 0 ? "{}" : gap ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}" : "{" + partial.join(",") + "}";
+	        gap = mind;
+	        return v;
 	    }
+	  } // If the JSON object does not yet have a stringify method, give it one.
 
 
-	    mode.selectedIDs = function(val) {
-	        if (!arguments.length) { return selectedIDs; }
-	        selectedIDs = val;
-	        return mode;
+	  if (typeof JSON.stringify !== "function") {
+	    meta = {
+	      // table of character substitutions
+	      "\b": "\\b",
+	      "\t": "\\t",
+	      "\n": "\\n",
+	      "\f": "\\f",
+	      "\r": "\\r",
+	      "\"": "\\\"",
+	      "\\": "\\\\"
 	    };
 
+	    JSON.stringify = function (value, replacer, space) {
+	      // The stringify method takes a value and an optional replacer, and an optional
+	      // space parameter, and returns a JSON text. The replacer can be a function
+	      // that can replace values, or an array of strings that will select the keys.
+	      // A default replacer method can be provided. Use of the space parameter can
+	      // produce text that is more easily readable.
+	      var i;
+	      gap = "";
+	      indent = ""; // If the space parameter is a number, make an indent string containing that
+	      // many spaces.
 
-	    mode.zoomToSelected = function() {
-	        context.map().zoomToEase(selectedEntities());
-	    };
+	      if (typeof space === "number") {
+	        for (i = 0; i < space; i += 1) {
+	          indent += " ";
+	        } // If the space parameter is a string, it will be used as the indent string.
 
+	      } else if (typeof space === "string") {
+	        indent = space;
+	      } // If there is a replacer, it must be a function or an array.
+	      // Otherwise, throw an error.
 
-	    mode.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return mode;
-	    };
 
+	      rep = replacer;
 
-	    mode.selectBehavior = function(val) {
-	        if (!arguments.length) { return _selectBehavior; }
-	        _selectBehavior = val;
-	        return mode;
-	    };
+	      if (replacer && typeof replacer !== "function" && (_typeof(replacer) !== "object" || typeof replacer.length !== "number")) {
+	        throw new Error("JSON.stringify");
+	      } // Make a fake root object containing our value under the key of "".
+	      // Return the result of stringifying the value.
 
 
-	    mode.follow = function(val) {
-	        if (!arguments.length) { return _follow; }
-	        _follow = val;
-	        return mode;
+	      return str("", {
+	        "": value
+	      });
 	    };
+	  } // If the JSON object does not yet have a parse method, give it one.
 
-	    function loadOperations() {
-
-	        _operations.forEach(function(operation) {
-	            if (operation.behavior) {
-	                context.uninstall(operation.behavior);
-	            }
-	        });
-
-	        _operations = Object.values(Operations)
-	            .map(function(o) { return o(context, selectedIDs); })
-	            .filter(function(o) { return o.available() && o.id !== 'delete' && o.id !== 'downgrade' && o.id !== 'copy'; });
 
-	        var copyOperation = operationCopy(context, selectedIDs);
-	        if (copyOperation.available()) {
-	            // group copy operation with delete/downgrade
-	            _operations.push(copyOperation);
-	        }
+	  if (typeof JSON.parse !== "function") {
+	    JSON.parse = function (text, reviver) {
+	      // The parse method takes a text and an optional reviver function, and returns
+	      // a JavaScript value if the text is a valid JSON text.
+	      var j;
 
-	        var downgradeOperation = operationDowngrade(context, selectedIDs);
-	        // don't allow delete if downgrade is available
-	        var lastOperation = !context.inIntro() && downgradeOperation.available() ? downgradeOperation : operationDelete(context, selectedIDs);
+	      function walk(holder, key) {
+	        // The walk method is used to recursively walk the resulting structure so
+	        // that modifications can be made.
+	        var k;
+	        var v;
+	        var value = holder[key];
 
-	        _operations.push(lastOperation);
+	        if (value && _typeof(value) === "object") {
+	          for (k in value) {
+	            if (Object.prototype.hasOwnProperty.call(value, k)) {
+	              v = walk(value, k);
 
-	        _operations.forEach(function(operation) {
-	            if (operation.behavior) {
-	                context.install(operation.behavior);
+	              if (v !== undefined) {
+	                value[k] = v;
+	              } else {
+	                delete value[k];
+	              }
 	            }
-	        });
-
-	        // remove any displayed menu
-	        context.ui().closeEditMenu();
-	    }
-
-	    mode.operations = function() {
-	        return _operations;
-	    };
-
+	          }
+	        }
 
-	    mode.enter = function() {
-	        if (!checkSelectedIDs()) { return; }
-
-	        context.features().forceVisible(selectedIDs);
-
-	        _modeDragNode.restoreSelectedIDs(selectedIDs);
-
-	        loadOperations();
-
-	        if (!_behaviors.length) {
-	            if (!_selectBehavior) { _selectBehavior = behaviorSelect(context); }
-
-	            _behaviors = [
-	                behaviorPaste(context),
-	                _breatheBehavior,
-	                behaviorHover(context).on('hover', context.ui().sidebar.hoverModeSelect),
-	                _selectBehavior,
-	                behaviorLasso(context),
-	                _modeDragNode.behavior,
-	                modeDragNote(context).behavior
-	            ];
-	        }
-	        _behaviors.forEach(context.install);
-
-	        keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on(['[', 'pgup'], previousVertex)
-	            .on([']', 'pgdown'], nextVertex)
-	            .on(['{', uiCmd('⌘['), 'home'], firstVertex)
-	            .on(['}', uiCmd('⌘]'), 'end'], lastVertex)
-	            .on(uiCmd('⇧←'), nudgeSelection([-10, 0]))
-	            .on(uiCmd('⇧↑'), nudgeSelection([0, -10]))
-	            .on(uiCmd('⇧→'), nudgeSelection([10, 0]))
-	            .on(uiCmd('⇧↓'), nudgeSelection([0, 10]))
-	            .on(uiCmd('⇧⌘←'), nudgeSelection([-100, 0]))
-	            .on(uiCmd('⇧⌘↑'), nudgeSelection([0, -100]))
-	            .on(uiCmd('⇧⌘→'), nudgeSelection([100, 0]))
-	            .on(uiCmd('⇧⌘↓'), nudgeSelection([0, 100]))
-	            .on(['\\', 'pause'], nextParent)
-	            .on('⎋', esc, true);
-
-	        select(document)
-	            .call(keybinding);
-
-	        context.ui().sidebar
-	            .select(selectedIDs, _newFeature);
-
-	        context.history()
-	            .on('change.select', function() {
-	                loadOperations();
-	                // reselect after change in case relation members were removed or added
-	                selectElements();
-	            })
-	            .on('undone.select', checkSelectedIDs)
-	            .on('redone.select', checkSelectedIDs);
-
-	        context.map()
-	            .on('drawn.select', selectElements)
-	            .on('crossEditableZoom.select', function() {
-	                selectElements();
-	                _breatheBehavior.restartIfNeeded(context.surface());
-	            });
+	        return reviver.call(holder, key, value);
+	      } // Parsing happens in four stages. In the first stage, we replace certain
+	      // Unicode characters with escape sequences. JavaScript handles many characters
+	      // incorrectly, either silently deleting them, or treating them as line endings.
 
-	        context.map().doubleUpHandler()
-	            .on('doubleUp.modeSelect', didDoubleUp);
 
+	      text = String(text);
+	      rx_dangerous.lastIndex = 0;
 
-	        selectElements();
+	      if (rx_dangerous.test(text)) {
+	        text = text.replace(rx_dangerous, function (a) {
+	          return "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
+	        });
+	      } // In the second stage, we run the text against regular expressions that look
+	      // for non-JSON patterns. We are especially concerned with "()" and "new"
+	      // because they can cause invocation, and "=" because it can cause mutation.
+	      // But just to be safe, we want to reject all unexpected forms.
+	      // We split the second stage into 4 regexp operations in order to work around
+	      // crippling inefficiencies in IE's and Safari's regexp engines. First we
+	      // replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
+	      // replace all simple value tokens with "]" characters. Third, we delete all
+	      // open brackets that follow a colon or comma or that begin the text. Finally,
+	      // we look to see that the remaining characters are only whitespace or "]" or
+	      // "," or ":" or "{" or "}". If that is so, then the text is safe for eval.
 
-	        if (_follow) {
-	            var extent = geoExtent();
-	            var graph = context.graph();
-	            selectedIDs.forEach(function(id) {
-	                var entity = context.entity(id);
-	                extent._extend(entity.extent(graph));
-	            });
 
-	            var loc = extent.center();
-	            context.map().centerEase(loc);
-	        }
+	      if (rx_one.test(text.replace(rx_two, "@").replace(rx_three, "]").replace(rx_four, ""))) {
+	        // In the third stage we use the eval function to compile the text into a
+	        // JavaScript structure. The "{" operator is subject to a syntactic ambiguity
+	        // in JavaScript: it can begin a block or an object literal. We wrap the text
+	        // in parens to eliminate the ambiguity.
+	        j = eval("(" + text + ")"); // In the optional fourth stage, we recursively walk the new structure, passing
+	        // each name/value pair to a reviver function for possible transformation.
 
+	        return typeof reviver === "function" ? walk({
+	          "": j
+	        }, "") : j;
+	      } // If the text is not JSON parseable, then a SyntaxError is thrown.
 
-	        function nudgeSelection(delta) {
-	            return function() {
-	                // prevent nudging during low zoom selection
-	                if (!context.map().withinEditableZoom()) { return; }
 
-	                var moveOp = operationMove(context, selectedIDs);
-	                if (moveOp.disabled()) {
-	                    context.ui().flash
-	                        .duration(4000)
-	                        .iconName('#iD-operation-' + moveOp.id)
-	                        .iconClass('operation disabled')
-	                        .text(moveOp.tooltip)();
-	                } else {
-	                    context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
-	                }
-	            };
-	        }
+	      throw new SyntaxError("JSON.parse");
+	    };
+	  }
+	})();
 
+	var json2 = json2Plugin;
 
-	        function didDoubleUp(loc) {
-	            if (!context.map().withinEditableZoom()) { return; }
+	function json2Plugin() {
+	  return {};
+	}
 
-	            var target = select(event.target);
+	var plugins = [json2];
+	var store_legacy = storeEngine.createStore(all, plugins);
 
-	            var datum = target.datum();
-	            var entity = datum && datum.properties && datum.properties.entity;
-	            if (!entity) { return; }
+	//
+	// This code is only compatible with IE10+ because the [XDomainRequest](http://bit.ly/LfO7xo)
+	// object, IE<10's idea of [CORS](http://en.wikipedia.org/wiki/Cross-origin_resource_sharing),
+	// does not support custom headers, which this uses everywhere.
 
-	            if (entity instanceof osmWay && target.classed('target')) {
-	                var choice = geoChooseEdge(context.graph().childNodes(entity), loc, context.projection);
-	                var prev = entity.nodes[choice.index - 1];
-	                var next = entity.nodes[choice.index];
 
-	                context.perform(
-	                    actionAddMidpoint({ loc: choice.loc, edge: [prev, next] }, osmNode()),
-	                    _t('operations.add.annotation.vertex')
-	                );
+	var osmAuth = function osmAuth(o) {
+	  var oauth = {}; // authenticated users will also have a request token secret, but it's
+	  // not used in transactions with the server
 
-	            } else if (entity.type === 'midpoint') {
-	                context.perform(
-	                    actionAddMidpoint({ loc: entity.loc, edge: entity.edge }, osmNode()),
-	                    _t('operations.add.annotation.vertex'));
-	            }
-	        }
+	  oauth.authenticated = function () {
+	    return !!(token('oauth_token') && token('oauth_token_secret'));
+	  };
 
+	  oauth.logout = function () {
+	    token('oauth_token', '');
+	    token('oauth_token_secret', '');
+	    token('oauth_request_token_secret', '');
+	    return oauth;
+	  }; // TODO: detect lack of click event
+
+
+	  oauth.authenticate = function (callback) {
+	    if (oauth.authenticated()) return callback();
+	    oauth.logout(); // ## Getting a request token
+
+	    var params = timenonce(getAuth(o)),
+	        url = o.url + '/oauth/request_token';
+	    params.oauth_signature = ohauth_1.signature(o.oauth_secret, '', ohauth_1.baseString('POST', url, params));
+
+	    if (!o.singlepage) {
+	      // Create a 600x550 popup window in the center of the screen
+	      var w = 600,
+	          h = 550,
+	          settings = [['width', w], ['height', h], ['left', screen.width / 2 - w / 2], ['top', screen.height / 2 - h / 2]].map(function (x) {
+	        return x.join('=');
+	      }).join(','),
+	          popup = window.open('about:blank', 'oauth_window', settings);
+	      oauth.popupWindow = popup;
+
+	      if (!popup) {
+	        var error = new Error('Popup was blocked');
+	        error.status = 'popup-blocked';
+	        throw error;
+	      }
+	    } // Request a request token. When this is complete, the popup
+	    // window is redirected to OSM's authorization page.
 
-	        function selectElements() {
-	            if (!checkSelectedIDs()) { return; }
 
-	            var surface = context.surface();
+	    ohauth_1.xhr('POST', url, params, null, {}, reqTokenDone);
+	    o.loading();
 
-	            surface.selectAll('.selected-member')
-	                .classed('selected-member', false);
+	    function reqTokenDone(err, xhr) {
+	      o.done();
+	      if (err) return callback(err);
+	      var resp = ohauth_1.stringQs(xhr.response);
+	      token('oauth_request_token_secret', resp.oauth_token_secret);
+	      var authorize_url = o.url + '/oauth/authorize?' + ohauth_1.qsString({
+	        oauth_token: resp.oauth_token,
+	        oauth_callback: resolveUrl$1(o.landing)
+	      });
 
-	            surface.selectAll('.selected')
-	                .classed('selected', false);
+	      if (o.singlepage) {
+	        location.href = authorize_url;
+	      } else {
+	        popup.location = authorize_url;
+	      }
+	    } // Called by a function in a landing page, in the popup window. The
+	    // window closes itself.
 
-	            surface.selectAll('.related')
-	                .classed('related', false);
 
-	            singularParent();
-	            if (_relatedParent) {
-	                surface.selectAll(utilEntitySelector([_relatedParent]))
-	                    .classed('related', true);
-	            }
+	    window.authComplete = function (token) {
+	      var oauth_token = ohauth_1.stringQs(token.split('?')[1]);
+	      get_access_token(oauth_token.oauth_token);
+	      delete window.authComplete;
+	    }; // ## Getting an request token
+	    //
+	    // At this point we have an `oauth_token`, brought in from a function
+	    // call on a landing page popup.
 
-	            if (context.map().withinEditableZoom()) {
-	                // Apply selection styling if not in wide selection
 
-	                surface
-	                    .selectAll(utilDeepMemberSelector(selectedIDs, context.graph(), true /* skipMultipolgonMembers */))
-	                    .classed('selected-member', true);
-	                surface
-	                    .selectAll(utilEntityOrDeepMemberSelector(selectedIDs, context.graph()))
-	                    .classed('selected', true);
-	            }
+	    function get_access_token(oauth_token) {
+	      var url = o.url + '/oauth/access_token',
+	          params = timenonce(getAuth(o)),
+	          request_token_secret = token('oauth_request_token_secret');
+	      params.oauth_token = oauth_token;
+	      params.oauth_signature = ohauth_1.signature(o.oauth_secret, request_token_secret, ohauth_1.baseString('POST', url, params)); // ## Getting an access token
+	      //
+	      // The final token required for authentication. At this point
+	      // we have a `request token secret`
 
-	        }
+	      ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
+	      o.loading();
+	    }
 
+	    function accessTokenDone(err, xhr) {
+	      o.done();
+	      if (err) return callback(err);
+	      var access_token = ohauth_1.stringQs(xhr.response);
+	      token('oauth_token', access_token.oauth_token);
+	      token('oauth_token_secret', access_token.oauth_token_secret);
+	      callback(null, oauth);
+	    }
+	  };
 
-	        function esc() {
-	            if (context.container().select('.combobox').size()) { return; }
-	            context.enter(modeBrowse(context));
-	        }
+	  oauth.bringPopupWindowToFront = function () {
+	    var brougtPopupToFront = false;
 
+	    try {
+	      // This may cause a cross-origin error:
+	      // `DOMException: Blocked a frame with origin "..." from accessing a cross-origin frame.`
+	      if (oauth.popupWindow && !oauth.popupWindow.closed) {
+	        oauth.popupWindow.focus();
+	        brougtPopupToFront = true;
+	      }
+	    } catch (err) {// Bringing popup window to front failed (probably because of the cross-origin error mentioned above)
+	    }
 
-	        function firstVertex() {
-	            event.preventDefault();
-	            var entity = singular();
-	            var parent = singularParent();
-	            var way;
+	    return brougtPopupToFront;
+	  };
 
-	            if (entity && entity.type === 'way') {
-	                way = entity;
-	            } else if (parent) {
-	                way = context.entity(parent);
-	            }
+	  oauth.bootstrapToken = function (oauth_token, callback) {
+	    // ## Getting an request token
+	    // At this point we have an `oauth_token`, brought in from a function
+	    // call on a landing page popup.
+	    function get_access_token(oauth_token) {
+	      var url = o.url + '/oauth/access_token',
+	          params = timenonce(getAuth(o)),
+	          request_token_secret = token('oauth_request_token_secret');
+	      params.oauth_token = oauth_token;
+	      params.oauth_signature = ohauth_1.signature(o.oauth_secret, request_token_secret, ohauth_1.baseString('POST', url, params)); // ## Getting an access token
+	      // The final token required for authentication. At this point
+	      // we have a `request token secret`
 
-	            if (way) {
-	                context.enter(
-	                    modeSelect(context, [way.first()]).follow(true)
-	                );
-	            }
-	        }
+	      ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
+	      o.loading();
+	    }
 
+	    function accessTokenDone(err, xhr) {
+	      o.done();
+	      if (err) return callback(err);
+	      var access_token = ohauth_1.stringQs(xhr.response);
+	      token('oauth_token', access_token.oauth_token);
+	      token('oauth_token_secret', access_token.oauth_token_secret);
+	      callback(null, oauth);
+	    }
 
-	        function lastVertex() {
-	            event.preventDefault();
-	            var entity = singular();
-	            var parent = singularParent();
-	            var way;
+	    get_access_token(oauth_token);
+	  }; // # xhr
+	  //
+	  // A single XMLHttpRequest wrapper that does authenticated calls if the
+	  // user has logged in.
 
-	            if (entity && entity.type === 'way') {
-	                way = entity;
-	            } else if (parent) {
-	                way = context.entity(parent);
-	            }
 
-	            if (way) {
-	                context.enter(
-	                    modeSelect(context, [way.last()]).follow(true)
-	                );
-	            }
-	        }
+	  oauth.xhr = function (options, callback) {
+	    if (!oauth.authenticated()) {
+	      if (o.auto) {
+	        return oauth.authenticate(run);
+	      } else {
+	        callback('not authenticated', null);
+	        return;
+	      }
+	    } else {
+	      return run();
+	    }
 
+	    function run() {
+	      var params = timenonce(getAuth(o)),
+	          oauth_token_secret = token('oauth_token_secret'),
+	          url = options.prefix !== false ? o.url + options.path : options.path,
+	          url_parts = url.replace(/#.*$/, '').split('?', 2),
+	          base_url = url_parts[0],
+	          query = url_parts.length === 2 ? url_parts[1] : ''; // https://tools.ietf.org/html/rfc5849#section-3.4.1.3.1
 
-	        function previousVertex() {
-	            event.preventDefault();
-	            var parent = singularParent();
-	            if (!parent) { return; }
+	      if ((!options.options || !options.options.header || options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') && options.content) {
+	        params = immutable(params, ohauth_1.stringQs(options.content));
+	      }
 
-	            var way = context.entity(parent);
-	            var length = way.nodes.length;
-	            var curr = way.nodes.indexOf(selectedIDs[0]);
-	            var index = -1;
+	      params.oauth_token = token('oauth_token');
+	      params.oauth_signature = ohauth_1.signature(o.oauth_secret, oauth_token_secret, ohauth_1.baseString(options.method, base_url, immutable(params, ohauth_1.stringQs(query))));
+	      return ohauth_1.xhr(options.method, url, params, options.content, options.options, done);
+	    }
 
-	            if (curr > 0) {
-	                index = curr - 1;
-	            } else if (way.isClosed()) {
-	                index = length - 2;
-	            }
+	    function done(err, xhr) {
+	      if (err) return callback(err);else if (xhr.responseXML) return callback(err, xhr.responseXML);else return callback(err, xhr.response);
+	    }
+	  }; // pre-authorize this object, if we can just get a token and token_secret
+	  // from the start
 
-	            if (index !== -1) {
-	                context.enter(
-	                    modeSelect(context, [way.nodes[index]]).follow(true)
-	                );
-	            }
-	        }
 
+	  oauth.preauth = function (c) {
+	    if (!c) return;
+	    if (c.oauth_token) token('oauth_token', c.oauth_token);
+	    if (c.oauth_token_secret) token('oauth_token_secret', c.oauth_token_secret);
+	    return oauth;
+	  };
 
-	        function nextVertex() {
-	            event.preventDefault();
-	            var parent = singularParent();
-	            if (!parent) { return; }
+	  oauth.options = function (_) {
+	    if (!arguments.length) return o;
+	    o = _;
+	    o.url = o.url || 'https://www.openstreetmap.org';
+	    o.landing = o.landing || 'land.html';
+	    o.singlepage = o.singlepage || false; // Optional loading and loading-done functions for nice UI feedback.
+	    // by default, no-ops
 
-	            var way = context.entity(parent);
-	            var length = way.nodes.length;
-	            var curr = way.nodes.indexOf(selectedIDs[0]);
-	            var index = -1;
+	    o.loading = o.loading || function () {};
 
-	            if (curr < length - 1) {
-	                index = curr + 1;
-	            } else if (way.isClosed()) {
-	                index = 0;
-	            }
+	    o.done = o.done || function () {};
 
-	            if (index !== -1) {
-	                context.enter(
-	                    modeSelect(context, [way.nodes[index]]).follow(true)
-	                );
-	            }
-	        }
+	    return oauth.preauth(o);
+	  }; // 'stamp' an authentication object from `getAuth()`
+	  // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
+	  // and timestamp
 
 
-	        function nextParent() {
-	            event.preventDefault();
-	            var parents = commonParents();
-	            if (!parents || parents.length < 2) { return; }
+	  function timenonce(o) {
+	    o.oauth_timestamp = ohauth_1.timestamp();
+	    o.oauth_nonce = ohauth_1.nonce();
+	    return o;
+	  } // get/set tokens. These are prefixed with the base URL so that `osm-auth`
+	  // can be used with multiple APIs and the keys in `localStorage`
+	  // will not clash
 
-	            var index = parents.indexOf(_relatedParent);
-	            if (index < 0 || index > parents.length - 2) {
-	                _relatedParent = parents[0];
-	            } else {
-	                _relatedParent = parents[index + 1];
-	            }
 
-	            var surface = context.surface();
-	            surface.selectAll('.related')
-	                .classed('related', false);
+	  var token;
 
-	            if (_relatedParent) {
-	                surface.selectAll(utilEntitySelector([_relatedParent]))
-	                    .classed('related', true);
-	            }
-	        }
+	  if (store_legacy.enabled) {
+	    token = function token(x, y) {
+	      if (arguments.length === 1) return store_legacy.get(o.url + x);else if (arguments.length === 2) return store_legacy.set(o.url + x, y);
 	    };
+	  } else {
+	    var storage = {};
 
+	    token = function token(x, y) {
+	      if (arguments.length === 1) return storage[o.url + x];else if (arguments.length === 2) return storage[o.url + x] = y;
+	    };
+	  } // Get an authentication object. If you just add and remove properties
+	  // from a single object, you'll need to use `delete` to make sure that
+	  // it doesn't contain undesired properties for authentication
 
-	    mode.exit = function() {
-
-	        _newFeature = false;
-
-	        _operations.forEach(function(operation) {
-	            if (operation.behavior) {
-	                context.uninstall(operation.behavior);
-	            }
-	        });
-	        _operations = [];
-
-	        _behaviors.forEach(context.uninstall);
 
-	        select(document)
-	            .call(keybinding.unbind);
+	  function getAuth(o) {
+	    return {
+	      oauth_consumer_key: o.oauth_consumer_key,
+	      oauth_signature_method: 'HMAC-SHA1'
+	    };
+	  } // potentially pre-authorize
 
-	        context.ui().closeEditMenu();
 
-	        context.history()
-	            .on('change.select', null)
-	            .on('undone.select', null)
-	            .on('redone.select', null);
+	  oauth.options(o);
+	  return oauth;
+	};
 
-	        var surface = context.surface();
+	var JXON = new function () {
+	  var sValueProp = 'keyValue',
+	      sAttributesProp = 'keyAttributes',
+	      sAttrPref = '@',
 
-	        surface
-	            .selectAll('.selected-member')
-	            .classed('selected-member', false);
+	  /* you can customize these values */
+	  aCache = [],
+	      rIsNull = /^\s*$/,
+	      rIsBool = /^(?:true|false)$/i;
 
-	        surface
-	            .selectAll('.selected')
-	            .classed('selected', false);
+	  function parseText(sValue) {
+	    if (rIsNull.test(sValue)) {
+	      return null;
+	    }
 
-	        surface
-	            .selectAll('.highlighted')
-	            .classed('highlighted', false);
+	    if (rIsBool.test(sValue)) {
+	      return sValue.toLowerCase() === 'true';
+	    }
 
-	        surface
-	            .selectAll('.related')
-	            .classed('related', false);
+	    if (isFinite(sValue)) {
+	      return parseFloat(sValue);
+	    }
 
-	        context.map().on('drawn.select', null);
-	        context.ui().sidebar.hide();
-	        context.features().forceVisible([]);
+	    if (isFinite(Date.parse(sValue))) {
+	      return new Date(sValue);
+	    }
 
-	        var entity = singular();
-	        if (_newFeature && entity && entity.type === 'relation' &&
-	            // no tags
-	            Object.keys(entity.tags).length === 0 &&
-	            // no parent relations
-	            context.graph().parentRelations(entity).length === 0 &&
-	            // no members or one member with no role
-	            (entity.members.length === 0 || (entity.members.length === 1 && !entity.members[0].role))
-	        ) {
-	            // the user added this relation but didn't edit it at all, so just delete it
-	            var deleteAction = actionDeleteRelation(entity.id, true /* don't delete untagged members */);
-	            context.perform(deleteAction, _t('operations.delete.annotation.relation'));
-	        }
-	    };
+	    return sValue;
+	  }
 
+	  function EmptyTree() {}
 
-	    return mode;
-	}
+	  EmptyTree.prototype.toString = function () {
+	    return 'null';
+	  };
 
-	function uiLasso(context) {
-	    var group, polygon;
+	  EmptyTree.prototype.valueOf = function () {
+	    return null;
+	  };
 
-	    lasso.coordinates = [];
+	  function objectify(vValue) {
+	    return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
+	  }
 
-	    function lasso(selection) {
-	        context.container()
-	            .classed('lasso', true);
+	  function createObjTree(oParentNode, nVerb, bFreeze, bNesteAttr) {
+	    var nLevelStart = aCache.length,
+	        bChildren = oParentNode.hasChildNodes(),
+	        bAttributes = oParentNode.hasAttributes(),
+	        bHighVerb = Boolean(nVerb & 2);
+	    var sProp,
+	        vContent,
+	        nLength = 0,
+	        sCollectedTxt = '',
+	        vResult = bHighVerb ? {} :
+	    /* put here the default value for empty nodes: */
+	    true;
 
-	        group = selection
-	            .append('g')
-	            .attr('class', 'lasso hide');
+	    if (bChildren) {
+	      for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
+	        oNode = oParentNode.childNodes.item(nItem);
 
-	        polygon = group
-	            .append('path')
-	            .attr('class', 'lasso-path');
+	        if (oNode.nodeType === 4) {
+	          sCollectedTxt += oNode.nodeValue;
+	        }
+	        /* nodeType is 'CDATASection' (4) */
+	        else if (oNode.nodeType === 3) {
+	            sCollectedTxt += oNode.nodeValue.trim();
+	          }
+	          /* nodeType is 'Text' (3) */
+	          else if (oNode.nodeType === 1 && !oNode.prefix) {
+	              aCache.push(oNode);
+	            }
+	        /* nodeType is 'Element' (1) */
 
-	        group
-	            .call(uiToggle(true));
+	      }
 	    }
 
+	    var nLevelEnd = aCache.length,
+	        vBuiltVal = parseText(sCollectedTxt);
 
-	    function draw() {
-	        if (polygon) {
-	            polygon.data([lasso.coordinates])
-	                .attr('d', function(d) { return 'M' + d.join(' L') + ' Z'; });
-	        }
+	    if (!bHighVerb && (bChildren || bAttributes)) {
+	      vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
 	    }
 
+	    for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
+	      sProp = aCache[nElId].nodeName.toLowerCase();
+	      vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
 
-	    lasso.extent = function () {
-	        return lasso.coordinates.reduce(function(extent, point) {
-	            return extent.extend(geoExtent(point));
-	        }, geoExtent());
-	    };
+	      if (vResult.hasOwnProperty(sProp)) {
+	        if (vResult[sProp].constructor !== Array) {
+	          vResult[sProp] = [vResult[sProp]];
+	        }
 
+	        vResult[sProp].push(vContent);
+	      } else {
+	        vResult[sProp] = vContent;
+	        nLength++;
+	      }
+	    }
 
-	    lasso.p = function(_) {
-	        if (!arguments.length) { return lasso; }
-	        lasso.coordinates.push(_);
-	        draw();
-	        return lasso;
-	    };
+	    if (bAttributes) {
+	      var nAttrLen = oParentNode.attributes.length,
+	          sAPrefix = bNesteAttr ? '' : sAttrPref,
+	          oAttrParent = bNesteAttr ? {} : vResult;
 
+	      for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
+	        oAttrib = oParentNode.attributes.item(nAttrib);
+	        oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
+	      }
 
-	    lasso.close = function() {
-	        if (group) {
-	            group.call(uiToggle(false, function() {
-	                select(this).remove();
-	            }));
+	      if (bNesteAttr) {
+	        if (bFreeze) {
+	          Object.freeze(oAttrParent);
 	        }
-	        context.container().classed('lasso', false);
-	    };
-
 
-	    return lasso;
-	}
+	        vResult[sAttributesProp] = oAttrParent;
+	        nLength -= nAttrLen - 1;
+	      }
+	    }
 
-	function behaviorLasso(context) {
+	    if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
+	      vResult[sValueProp] = vBuiltVal;
+	    } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
+	      vResult = vBuiltVal;
+	    }
 
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	    if (bFreeze && (bHighVerb || nLength > 0)) {
+	      Object.freeze(vResult);
+	    }
 
-	    var behavior = function(selection) {
-	        var lasso;
+	    aCache.length = nLevelStart;
+	    return vResult;
+	  }
 
+	  function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
+	    var vValue, oChild;
 
-	        function pointerdown() {
-	            var button = 0;  // left
-	            if (event.button === button && event.shiftKey === true) {
-	                lasso = null;
+	    if (oParentObj instanceof String || oParentObj instanceof Number || oParentObj instanceof Boolean) {
+	      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toString()));
+	      /* verbosity level is 0 */
+	    } else if (oParentObj.constructor === Date) {
+	      oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toGMTString()));
+	    }
 
-	                select(window)
-	                    .on(_pointerPrefix + 'move.lasso', pointermove)
-	                    .on(_pointerPrefix + 'up.lasso', pointerup);
+	    for (var sName in oParentObj) {
+	      vValue = oParentObj[sName];
 
-	                event.stopPropagation();
-	            }
-	        }
+	      if (isFinite(sName) || vValue instanceof Function) {
+	        continue;
+	      }
+	      /* verbosity level is 0 */
 
 
-	        function pointermove() {
-	            if (!lasso) {
-	                lasso = uiLasso(context);
-	                context.surface().call(lasso);
-	            }
+	      if (sName === sValueProp) {
+	        if (vValue !== null && vValue !== true) {
+	          oParentEl.appendChild(oXMLDoc.createTextNode(vValue.constructor === Date ? vValue.toGMTString() : String(vValue)));
+	        }
+	      } else if (sName === sAttributesProp) {
+	        /* verbosity level is 3 */
+	        for (var sAttrib in vValue) {
+	          oParentEl.setAttribute(sAttrib, vValue[sAttrib]);
+	        }
+	      } else if (sName.charAt(0) === sAttrPref) {
+	        oParentEl.setAttribute(sName.slice(1), vValue);
+	      } else if (vValue.constructor === Array) {
+	        for (var nItem = 0; nItem < vValue.length; nItem++) {
+	          oChild = oXMLDoc.createElement(sName);
+	          loadObjTree(oXMLDoc, oChild, vValue[nItem]);
+	          oParentEl.appendChild(oChild);
+	        }
+	      } else {
+	        oChild = oXMLDoc.createElement(sName);
 
-	            lasso.p(context.map().mouse());
+	        if (vValue instanceof Object) {
+	          loadObjTree(oXMLDoc, oChild, vValue);
+	        } else if (vValue !== null && vValue !== true) {
+	          oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
 	        }
 
+	        oParentEl.appendChild(oChild);
+	      }
+	    }
+	  }
 
-	        function normalize(a, b) {
-	            return [
-	                [Math.min(a[0], b[0]), Math.min(a[1], b[1])],
-	                [Math.max(a[0], b[0]), Math.max(a[1], b[1])]
-	            ];
-	        }
+	  this.build = function (oXMLParent, nVerbosity
+	  /* optional */
+	  , bFreeze
+	  /* optional */
+	  , bNesteAttributes
+	  /* optional */
+	  ) {
+	    var _nVerb = arguments.length > 1 && typeof nVerbosity === 'number' ? nVerbosity & 3 :
+	    /* put here the default verbosity level: */
+	    1;
 
+	    return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);
+	  };
 
-	        function lassoed() {
-	            if (!lasso) { return []; }
+	  this.unbuild = function (oObjTree) {
+	    var oNewDoc = document.implementation.createDocument('', '', null);
+	    loadObjTree(oNewDoc, oNewDoc, oObjTree);
+	    return oNewDoc;
+	  };
 
-	            var graph = context.graph();
-	            var limitToNodes;
+	  this.stringify = function (oObjTree) {
+	    return new XMLSerializer().serializeToString(JXON.unbuild(oObjTree));
+	  };
+	}(); // var myObject = JXON.build(doc);
+	// we got our javascript object! try: alert(JSON.stringify(myObject));
+	// var newDoc = JXON.unbuild(myObject);
+	// we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc));
 
-	            if (context.map().editableDataEnabled(true /* skipZoomCheck */) && context.map().isInWideSelection()) {
-	                // only select from the visible nodes
-	                limitToNodes = new Set(utilGetAllNodes(context.selectedIDs(), graph));
-	            } else if (!context.map().editableDataEnabled()) {
-	                return [];
-	            }
+	var tiler$5 = utilTiler();
+	var dispatch$6 = dispatch('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
+	var urlroot = 'https://www.openstreetmap.org';
+	var oauth = osmAuth({
+	  url: urlroot,
+	  oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
+	  oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
+	  loading: authLoading,
+	  done: authDone
+	}); // hardcode default block of Google Maps
+
+	var _imageryBlocklists = [/.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/];
+	var _tileCache = {
+	  toLoad: {},
+	  loaded: {},
+	  inflight: {},
+	  seen: {},
+	  rtree: new RBush()
+	};
+	var _noteCache = {
+	  toLoad: {},
+	  loaded: {},
+	  inflight: {},
+	  inflightPost: {},
+	  note: {},
+	  closed: {},
+	  rtree: new RBush()
+	};
+	var _userCache = {
+	  toLoad: {},
+	  user: {}
+	};
 
-	            var bounds = lasso.extent().map(context.projection.invert);
-	            var extent = geoExtent(normalize(bounds[0], bounds[1]));
+	var _cachedApiStatus;
 
-	            var intersects = context.history().intersects(extent).filter(function(entity) {
-	                return entity.type === 'node' &&
-	                    (!limitToNodes || limitToNodes.has(entity)) &&
-	                    geoPointInPolygon(context.projection(entity.loc), lasso.coordinates) &&
-	                    !context.features().isHidden(entity, graph, entity.geometry(graph));
-	            });
+	var _changeset = {};
 
-	            // sort the lassoed nodes as best we can
-	            intersects.sort(function(node1, node2) {
-	                var parents1 = graph.parentWays(node1);
-	                var parents2 = graph.parentWays(node2);
-	                if (parents1.length && parents2.length) {
-	                    // both nodes are vertices
-
-	                    var sharedParents = utilArrayIntersection(parents1, parents2);
-	                    if (sharedParents.length) {
-	                        var sharedParentNodes = sharedParents[0].nodes;
-	                        // vertices are members of the same way; sort them in their listed order
-	                        return sharedParentNodes.indexOf(node1.id) -
-	                            sharedParentNodes.indexOf(node2.id);
-	                    } else {
-	                        // vertices do not share a way; group them by their respective parent ways
-	                        return parseFloat(parents1[0].id.slice(1)) -
-	                            parseFloat(parents2[0].id.slice(1));
-	                    }
+	var _deferred = new Set();
 
-	                } else if (parents1.length || parents2.length) {
-	                    // only one node is a vertex; sort standalone points before vertices
-	                    return parents1.length - parents2.length;
-	                }
-	                // both nodes are standalone points; sort left to right
-	                return node1.loc[0] - node2.loc[0];
-	            });
+	var _connectionID = 1;
+	var _tileZoom$3 = 16;
+	var _noteZoom = 12;
 
-	            return intersects.map(function(entity) { return entity.id; });
-	        }
+	var _rateLimitError;
 
+	var _userChangesets;
 
-	        function pointerup() {
-	            select(window)
-	                .on(_pointerPrefix + 'move.lasso', null)
-	                .on(_pointerPrefix + 'up.lasso', null);
+	var _userDetails;
 
-	            if (!lasso) { return; }
+	var _off; // set a default but also load this from the API status
 
-	            var ids = lassoed();
-	            lasso.close();
 
-	            if (ids.length) {
-	                context.enter(modeSelect(context, ids));
-	            }
-	        }
+	var _maxWayNodes = 2000;
 
-	        selection
-	            .on(_pointerPrefix + 'down.lasso', pointerdown);
-	    };
+	function authLoading() {
+	  dispatch$6.call('authLoading');
+	}
+
+	function authDone() {
+	  dispatch$6.call('authDone');
+	}
 
+	function abortRequest$5(controllerOrXHR) {
+	  if (controllerOrXHR) {
+	    controllerOrXHR.abort();
+	  }
+	}
 
-	    behavior.off = function(selection) {
-	        selection.on(_pointerPrefix + 'down.lasso', null);
-	    };
+	function hasInflightRequests(cache) {
+	  return Object.keys(cache.inflight).length;
+	}
 
+	function abortUnwantedRequests$3(cache, visibleTiles) {
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    if (cache.toLoad[k]) return;
+	    if (visibleTiles.find(function (tile) {
+	      return k === tile.id;
+	    })) return;
+	    abortRequest$5(cache.inflight[k]);
+	    delete cache.inflight[k];
+	  });
+	}
 
-	    return behavior;
+	function getLoc(attrs) {
+	  var lon = attrs.lon && attrs.lon.value;
+	  var lat = attrs.lat && attrs.lat.value;
+	  return [parseFloat(lon), parseFloat(lat)];
 	}
 
-	function modeBrowse(context) {
-	    var mode = {
-	        button: 'browse',
-	        id: 'browse',
-	        title: _t('modes.browse.title'),
-	        description: _t('modes.browse.description')
-	    };
-	    var sidebar;
+	function getNodes(obj) {
+	  var elems = obj.getElementsByTagName('nd');
+	  var nodes = new Array(elems.length);
 
-	    var _selectBehavior;
-	    var _behaviors = [];
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    nodes[i] = 'n' + elems[i].attributes.ref.value;
+	  }
 
+	  return nodes;
+	}
 
-	    mode.selectBehavior = function(val) {
-	        if (!arguments.length) { return _selectBehavior; }
-	        _selectBehavior = val;
-	        return mode;
-	    };
+	function getNodesJSON(obj) {
+	  var elems = obj.nodes;
+	  var nodes = new Array(elems.length);
 
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    nodes[i] = 'n' + elems[i];
+	  }
 
-	    mode.enter = function() {
-	        if (!_behaviors.length) {
-	            if (!_selectBehavior) { _selectBehavior = behaviorSelect(context); }
-	            _behaviors = [
-	                behaviorPaste(context),
-	                behaviorHover(context).on('hover', context.ui().sidebar.hover),
-	                _selectBehavior,
-	                behaviorLasso(context),
-	                modeDragNode(context).behavior,
-	                modeDragNote(context).behavior
-	            ];
-	        }
-	        _behaviors.forEach(context.install);
+	  return nodes;
+	}
 
-	        // Get focus on the body.
-	        if (document.activeElement && document.activeElement.blur) {
-	            document.activeElement.blur();
-	        }
+	function getTags(obj) {
+	  var elems = obj.getElementsByTagName('tag');
+	  var tags = {};
 
-	        if (sidebar) {
-	            context.ui().sidebar.show(sidebar);
-	        } else {
-	            context.ui().sidebar.select(null);
-	        }
-	    };
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    var attrs = elems[i].attributes;
+	    tags[attrs.k.value] = attrs.v.value;
+	  }
 
+	  return tags;
+	}
 
-	    mode.exit = function() {
-	        context.ui().sidebar.hover.cancel();
-	        _behaviors.forEach(context.uninstall);
+	function getMembers(obj) {
+	  var elems = obj.getElementsByTagName('member');
+	  var members = new Array(elems.length);
 
-	        if (sidebar) {
-	            context.ui().sidebar.hide();
-	        }
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    var attrs = elems[i].attributes;
+	    members[i] = {
+	      id: attrs.type.value[0] + attrs.ref.value,
+	      type: attrs.type.value,
+	      role: attrs.role.value
 	    };
+	  }
 
+	  return members;
+	}
 
-	    mode.sidebar = function(_) {
-	        if (!arguments.length) { return sidebar; }
-	        sidebar = _;
-	        return mode;
-	    };
-
+	function getMembersJSON(obj) {
+	  var elems = obj.members;
+	  var members = new Array(elems.length);
 
-	    mode.operations = function() {
-	        return [operationPaste(context)];
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    var attrs = elems[i];
+	    members[i] = {
+	      id: attrs.type[0] + attrs.ref,
+	      type: attrs.type,
+	      role: attrs.role
 	    };
+	  }
 
-
-	    return mode;
+	  return members;
 	}
 
-	function behaviorAddWay(context) {
-	    var dispatch$1 = dispatch('start', 'startFromWay', 'startFromNode');
-	    var draw = behaviorDraw(context);
-
-	    function behavior(surface) {
-	        draw.on('click', function() { dispatch$1.apply('start', this, arguments); })
-	            .on('clickWay', function() { dispatch$1.apply('startFromWay', this, arguments); })
-	            .on('clickNode', function() { dispatch$1.apply('startFromNode', this, arguments); })
-	            .on('cancel', behavior.cancel)
-	            .on('finish', behavior.cancel);
-
-	        context.map()
-	            .dblclickZoomEnable(false);
+	function getVisible(attrs) {
+	  return !attrs.visible || attrs.visible.value !== 'false';
+	}
 
-	        surface.call(draw);
-	    }
+	function parseComments(comments) {
+	  var parsedComments = []; // for each comment
 
+	  for (var i = 0; i < comments.length; i++) {
+	    var comment = comments[i];
 
-	    behavior.off = function(surface) {
-	        surface.call(draw.off);
-	    };
+	    if (comment.nodeName === 'comment') {
+	      var childNodes = comment.childNodes;
+	      var parsedComment = {};
 
+	      for (var j = 0; j < childNodes.length; j++) {
+	        var node = childNodes[j];
+	        var nodeName = node.nodeName;
+	        if (nodeName === '#text') continue;
+	        parsedComment[nodeName] = node.textContent;
 
-	    behavior.cancel = function() {
-	        window.setTimeout(function() {
-	            context.map().dblclickZoomEnable(true);
-	        }, 1000);
+	        if (nodeName === 'uid') {
+	          var uid = node.textContent;
 
-	        context.enter(modeBrowse(context));
-	    };
+	          if (uid && !_userCache.user[uid]) {
+	            _userCache.toLoad[uid] = true;
+	          }
+	        }
+	      }
 
+	      if (parsedComment) {
+	        parsedComments.push(parsedComment);
+	      }
+	    }
+	  }
 
-	    return utilRebind(behavior, dispatch$1, 'on');
+	  return parsedComments;
 	}
 
-	function behaviorHash(context) {
-
-	    // cached window.location.hash
-	    var _cachedHash = null;
-	    // allowable latitude range
-	    var _latitudeLimit = 90 - 1e-8;
-
-	    function computedHashParameters() {
-	        var map = context.map();
-	        var center = map.center();
-	        var zoom = map.zoom();
-	        var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
-	        var oldParams = utilObjectOmit(utilStringQs(window.location.hash),
-	            ['comment', 'source', 'hashtags', 'walkthrough']
-	        );
-	        var newParams = {};
+	function encodeNoteRtree(note) {
+	  return {
+	    minX: note.loc[0],
+	    minY: note.loc[1],
+	    maxX: note.loc[0],
+	    maxY: note.loc[1],
+	    data: note
+	  };
+	}
 
-	        delete oldParams.id;
-	        var selected = context.selectedIDs().filter(function(id) {
-	            return context.hasEntity(id);
-	        });
-	        if (selected.length) {
-	            newParams.id = selected.join(',');
-	        }
+	var jsonparsers = {
+	  node: function nodeData(obj, uid) {
+	    return new osmNode({
+	      id: uid,
+	      visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+	      version: obj.version && obj.version.toString(),
+	      changeset: obj.changeset && obj.changeset.toString(),
+	      timestamp: obj.timestamp,
+	      user: obj.user,
+	      uid: obj.uid && obj.uid.toString(),
+	      loc: [parseFloat(obj.lon), parseFloat(obj.lat)],
+	      tags: obj.tags
+	    });
+	  },
+	  way: function wayData(obj, uid) {
+	    return new osmWay({
+	      id: uid,
+	      visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+	      version: obj.version && obj.version.toString(),
+	      changeset: obj.changeset && obj.changeset.toString(),
+	      timestamp: obj.timestamp,
+	      user: obj.user,
+	      uid: obj.uid && obj.uid.toString(),
+	      tags: obj.tags,
+	      nodes: getNodesJSON(obj)
+	    });
+	  },
+	  relation: function relationData(obj, uid) {
+	    return new osmRelation({
+	      id: uid,
+	      visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+	      version: obj.version && obj.version.toString(),
+	      changeset: obj.changeset && obj.changeset.toString(),
+	      timestamp: obj.timestamp,
+	      user: obj.user,
+	      uid: obj.uid && obj.uid.toString(),
+	      tags: obj.tags,
+	      members: getMembersJSON(obj)
+	    });
+	  }
+	};
 
-	        newParams.map = zoom.toFixed(2) +
-	            '/' + center[1].toFixed(precision) +
-	            '/' + center[0].toFixed(precision);
+	function parseJSON(payload, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
+
+	  if (!payload) {
+	    return callback({
+	      message: 'No JSON',
+	      status: -1
+	    });
+	  }
 
-	        return Object.assign(oldParams, newParams);
-	    }
+	  var json = payload;
+	  if (_typeof(json) !== 'object') json = JSON.parse(payload);
+	  if (!json.elements) return callback({
+	    message: 'No JSON',
+	    status: -1
+	  });
+	  var children = json.elements;
+	  var handle = window.requestIdleCallback(function () {
+	    var results = [];
+	    var result;
 
-	    function computedHash() {
-	        return '#' + utilQsString(computedHashParameters(), true);
+	    for (var i = 0; i < children.length; i++) {
+	      result = parseChild(children[i]);
+	      if (result) results.push(result);
 	    }
 
-	    function computedTitle(includeChangeCount) {
-
-	        var baseTitle = context.documentTitleBase() || 'iD';
-	        var contextual;
-	        var changeCount;
-	        var titleID;
+	    callback(null, results);
+	  });
 
-	        var selected = context.selectedIDs().filter(function(id) {
-	            return context.hasEntity(id);
-	        });
-	        if (selected.length) {
-	            var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
-	            if (selected.length > 1 ) {
-	                contextual = _t('title.labeled_and_more', {
-	                    labeled: firstLabel,
-	                    count: (selected.length - 1).toString()
-	                });
-	            } else {
-	                contextual = firstLabel;
-	            }
-	            titleID = 'context';
-	        }
+	  _deferred.add(handle);
 
-	        if (includeChangeCount) {
-	            changeCount = context.history().difference().summary().length;
-	            if (changeCount > 0) {
-	                titleID = contextual ? 'changes_context' : 'changes';
-	            }
-	        }
+	  function parseChild(child) {
+	    var parser = jsonparsers[child.type];
+	    if (!parser) return null;
+	    var uid;
+	    uid = osmEntity.id.fromOSM(child.type, child.id);
 
-	        if (titleID) {
-	            return _t('title.format.' + titleID, {
-	                changes: changeCount,
-	                base: baseTitle,
-	                context: contextual
-	            });
-	        }
+	    if (options.skipSeen) {
+	      if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-	        return baseTitle;
+	      _tileCache.seen[uid] = true;
 	    }
 
-	    function updateTitle(includeChangeCount) {
-	        if (!context.setsDocumentTitle()) { return; }
-
-	        var newTitle = computedTitle(includeChangeCount);
-	        if (document.title !== newTitle) {
-	            document.title = newTitle;
-	        }
-	    }
+	    return parser(child, uid);
+	  }
+	}
 
-	    function updateHashIfNeeded() {
-	        if (context.inIntro()) { return; }
+	var parsers = {
+	  node: function nodeData(obj, uid) {
+	    var attrs = obj.attributes;
+	    return new osmNode({
+	      id: uid,
+	      visible: getVisible(attrs),
+	      version: attrs.version.value,
+	      changeset: attrs.changeset && attrs.changeset.value,
+	      timestamp: attrs.timestamp && attrs.timestamp.value,
+	      user: attrs.user && attrs.user.value,
+	      uid: attrs.uid && attrs.uid.value,
+	      loc: getLoc(attrs),
+	      tags: getTags(obj)
+	    });
+	  },
+	  way: function wayData(obj, uid) {
+	    var attrs = obj.attributes;
+	    return new osmWay({
+	      id: uid,
+	      visible: getVisible(attrs),
+	      version: attrs.version.value,
+	      changeset: attrs.changeset && attrs.changeset.value,
+	      timestamp: attrs.timestamp && attrs.timestamp.value,
+	      user: attrs.user && attrs.user.value,
+	      uid: attrs.uid && attrs.uid.value,
+	      tags: getTags(obj),
+	      nodes: getNodes(obj)
+	    });
+	  },
+	  relation: function relationData(obj, uid) {
+	    var attrs = obj.attributes;
+	    return new osmRelation({
+	      id: uid,
+	      visible: getVisible(attrs),
+	      version: attrs.version.value,
+	      changeset: attrs.changeset && attrs.changeset.value,
+	      timestamp: attrs.timestamp && attrs.timestamp.value,
+	      user: attrs.user && attrs.user.value,
+	      uid: attrs.uid && attrs.uid.value,
+	      tags: getTags(obj),
+	      members: getMembers(obj)
+	    });
+	  },
+	  note: function parseNote(obj, uid) {
+	    var attrs = obj.attributes;
+	    var childNodes = obj.childNodes;
+	    var props = {};
+	    props.id = uid;
+	    props.loc = getLoc(attrs); // if notes are coincident, move them apart slightly
 
-	        var latestHash = computedHash();
-	        if (_cachedHash !== latestHash) {
-	            _cachedHash = latestHash;
+	    var coincident = false;
+	    var epsilon = 0.00001;
 
-	            // Update the URL hash without affecting the browser navigation stack,
-	            // though unavoidably creating a browser history entry
-	            window.history.replaceState(null, computedTitle(false /* includeChangeCount */), latestHash);
+	    do {
+	      if (coincident) {
+	        props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
+	      }
 
-	            // set the title we want displayed for the browser tab/window
-	            updateTitle(true /* includeChangeCount */);
-	        }
-	    }
+	      var bbox = geoExtent(props.loc).bbox();
+	      coincident = _noteCache.rtree.search(bbox).length;
+	    } while (coincident); // parse note contents
 
-	    var _throttledUpdate = throttle(updateHashIfNeeded, 500);
-	    var _throttledUpdateTitle = throttle(function() {
-	        updateTitle(true /* includeChangeCount */);
-	    }, 500);
 
-	    function hashchange() {
+	    for (var i = 0; i < childNodes.length; i++) {
+	      var node = childNodes[i];
+	      var nodeName = node.nodeName;
+	      if (nodeName === '#text') continue; // if the element is comments, parse the comments
 
-	        // ignore spurious hashchange events
-	        if (window.location.hash === _cachedHash) { return; }
+	      if (nodeName === 'comments') {
+	        props[nodeName] = parseComments(node.childNodes);
+	      } else {
+	        props[nodeName] = node.textContent;
+	      }
+	    }
 
-	        _cachedHash = window.location.hash;
+	    var note = new osmNote(props);
+	    var item = encodeNoteRtree(note);
+	    _noteCache.note[note.id] = note;
 
-	        var q = utilStringQs(_cachedHash);
-	        var mapArgs = (q.map || '').split('/').map(Number);
+	    _noteCache.rtree.insert(item);
 
-	        if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
-	            // replace bogus hash
-	            updateHashIfNeeded();
+	    return note;
+	  },
+	  user: function parseUser(obj, uid) {
+	    var attrs = obj.attributes;
+	    var user = {
+	      id: uid,
+	      display_name: attrs.display_name && attrs.display_name.value,
+	      account_created: attrs.account_created && attrs.account_created.value,
+	      changesets_count: '0',
+	      active_blocks: '0'
+	    };
+	    var img = obj.getElementsByTagName('img');
 
-	        } else {
-	            // don't update if the new hash already reflects the state of iD
-	            if (_cachedHash === computedHash()) { return; }
+	    if (img && img[0] && img[0].getAttribute('href')) {
+	      user.image_url = img[0].getAttribute('href');
+	    }
 
-	            var mode = context.mode();
+	    var changesets = obj.getElementsByTagName('changesets');
 
-	            context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);
+	    if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
+	      user.changesets_count = changesets[0].getAttribute('count');
+	    }
 
-	            if (q.id) {
-	                var ids = q.id.split(',').filter(function(id) {
-	                    return context.hasEntity(id);
-	                });
-	                var skip = mode && mode.id === 'select' && utilArrayIdentical(mode.selectedIDs(), ids);
-	                if (ids.length && !skip) {
-	                    context.enter(modeSelect(context, ids));
-	                    return;
-	                }
-	            }
+	    var blocks = obj.getElementsByTagName('blocks');
 
-	            var center = context.map().center();
-	            var dist = geoSphericalDistance(center, [mapArgs[2], mapArgs[1]]);
-	            var maxdist = 500;
+	    if (blocks && blocks[0]) {
+	      var received = blocks[0].getElementsByTagName('received');
 
-	            // Don't allow the hash location to change too much while drawing
-	            // This can happen if the user accidently hit the back button.  #3996
-	            if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
-	                context.enter(modeBrowse(context));
-	                return;
-	            }
-	        }
+	      if (received && received[0] && received[0].getAttribute('active')) {
+	        user.active_blocks = received[0].getAttribute('active');
+	      }
 	    }
 
-	    function behavior() {
-	        context.map()
-	            .on('move.behaviorHash', _throttledUpdate);
+	    _userCache.user[uid] = user;
+	    delete _userCache.toLoad[uid];
+	    return user;
+	  }
+	};
+
+	function parseXML(xml, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
+
+	  if (!xml || !xml.childNodes) {
+	    return callback({
+	      message: 'No XML',
+	      status: -1
+	    });
+	  }
 
-	        context.history()
-	            .on('change.behaviorHash', _throttledUpdateTitle);
+	  var root = xml.childNodes[0];
+	  var children = root.childNodes;
+	  var handle = window.requestIdleCallback(function () {
+	    var results = [];
+	    var result;
 
-	        context
-	            .on('enter.behaviorHash', _throttledUpdate);
+	    for (var i = 0; i < children.length; i++) {
+	      result = parseChild(children[i]);
+	      if (result) results.push(result);
+	    }
 
-	        select(window)
-	            .on('hashchange.behaviorHash', hashchange);
+	    callback(null, results);
+	  });
 
-	        if (window.location.hash) {
-	            var q = utilStringQs(window.location.hash);
+	  _deferred.add(handle);
 
-	            if (q.id) {
-	                //if (!context.history().hasRestorableChanges()) {
-	                    // targeting specific features: download, select, and zoom to them
-	                    context.zoomToEntity(q.id.split(',')[0], !q.map);
-	                //}
-	            }
+	  function parseChild(child) {
+	    var parser = parsers[child.nodeName];
+	    if (!parser) return null;
+	    var uid;
 
-	            if (q.walkthrough === 'true') {
-	                behavior.startWalkthrough = true;
-	            }
+	    if (child.nodeName === 'user') {
+	      uid = child.attributes.id.value;
 
-	            if (q.map) {
-	                behavior.hadHash = true;
-	            }
+	      if (options.skipSeen && _userCache.user[uid]) {
+	        delete _userCache.toLoad[uid];
+	        return null;
+	      }
+	    } else if (child.nodeName === 'note') {
+	      uid = child.getElementsByTagName('id')[0].textContent;
+	    } else {
+	      uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);
 
-	            hashchange();
+	      if (options.skipSeen) {
+	        if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-	            updateTitle(false);
-	        }
+	        _tileCache.seen[uid] = true;
+	      }
 	    }
 
-	    behavior.off = function() {
-	        _throttledUpdate.cancel();
-	        _throttledUpdateTitle.cancel();
+	    return parser(child, uid);
+	  }
+	} // replace or remove note from rtree
 
-	        context.map()
-	            .on('move.behaviorHash', null);
 
-	        context
-	            .on('enter.behaviorHash', null);
+	function updateRtree$3(item, replace) {
+	  _noteCache.rtree.remove(item, function isEql(a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	        select(window)
-	            .on('hashchange.behaviorHash', null);
+	  if (replace) {
+	    _noteCache.rtree.insert(item);
+	  }
+	}
 
-	        window.location.hash = '';
-	    };
+	function wrapcb(thisArg, callback, cid) {
+	  return function (err, result) {
+	    if (err) {
+	      // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
+	      if (err.status === 400 || err.status === 401 || err.status === 403) {
+	        thisArg.logout();
+	      }
 
-	    return behavior;
+	      return callback.call(thisArg, err);
+	    } else if (thisArg.getConnectionId() !== cid) {
+	      return callback.call(thisArg, {
+	        message: 'Connection Switched',
+	        status: -1
+	      });
+	    } else {
+	      return callback.call(thisArg, err, result);
+	    }
+	  };
 	}
 
-	/*
-	    iD.coreDifference represents the difference between two graphs.
-	    It knows how to calculate the set of entities that were
-	    created, modified, or deleted, and also contains the logic
-	    for recursively extending a difference to the complete set
-	    of entities that will require a redraw, taking into account
-	    child and parent relationships.
-	 */
-	function coreDifference(base, head) {
-	    var _changes = {};
-	    var _didChange = {};  // 'addition', 'deletion', 'geometry', 'properties'
-	    var _diff = {};
+	var serviceOsm = {
+	  init: function init() {
+	    utilRebind(this, dispatch$6, 'on');
+	  },
+	  reset: function reset() {
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	    function checkEntityID(id) {
-	        var h = head.entities[id];
-	        var b = base.entities[id];
+	      _deferred["delete"](handle);
+	    });
+	    _connectionID++;
+	    _userChangesets = undefined;
+	    _userDetails = undefined;
+	    _rateLimitError = undefined;
+	    Object.values(_tileCache.inflight).forEach(abortRequest$5);
+	    Object.values(_noteCache.inflight).forEach(abortRequest$5);
+	    Object.values(_noteCache.inflightPost).forEach(abortRequest$5);
+	    if (_changeset.inflight) abortRequest$5(_changeset.inflight);
+	    _tileCache = {
+	      toLoad: {},
+	      loaded: {},
+	      inflight: {},
+	      seen: {},
+	      rtree: new RBush()
+	    };
+	    _noteCache = {
+	      toLoad: {},
+	      loaded: {},
+	      inflight: {},
+	      inflightPost: {},
+	      note: {},
+	      closed: {},
+	      rtree: new RBush()
+	    };
+	    _userCache = {
+	      toLoad: {},
+	      user: {}
+	    };
+	    _cachedApiStatus = undefined;
+	    _changeset = {};
+	    return this;
+	  },
+	  getConnectionId: function getConnectionId() {
+	    return _connectionID;
+	  },
+	  changesetURL: function changesetURL(changesetID) {
+	    return urlroot + '/changeset/' + changesetID;
+	  },
+	  changesetsURL: function changesetsURL(center, zoom) {
+	    var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+	    return urlroot + '/history#map=' + Math.floor(zoom) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+	  },
+	  entityURL: function entityURL(entity) {
+	    return urlroot + '/' + entity.type + '/' + entity.osmId();
+	  },
+	  historyURL: function historyURL(entity) {
+	    return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
+	  },
+	  userURL: function userURL(username) {
+	    return urlroot + '/user/' + username;
+	  },
+	  noteURL: function noteURL(note) {
+	    return urlroot + '/note/' + note.id;
+	  },
+	  noteReportURL: function noteReportURL(note) {
+	    return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
+	  },
+	  // Generic method to load data from the OSM API
+	  // Can handle either auth or unauth calls.
+	  loadFromAPI: function loadFromAPI(path, callback, options) {
+	    options = Object.assign({
+	      skipSeen: true
+	    }, options);
+	    var that = this;
+	    var cid = _connectionID;
 
-	        if (h === b) { return; }
-	        if (_changes[id]) { return; }
+	    function done(err, payload) {
+	      if (that.getConnectionId() !== cid) {
+	        if (callback) callback({
+	          message: 'Connection Switched',
+	          status: -1
+	        });
+	        return;
+	      }
 
-	        if (!h && b) {
-	            _changes[id] = { base: b, head: h };
-	            _didChange.deletion = true;
-	            return;
-	        }
-	        if (h && !b) {
-	            _changes[id] = { base: b, head: h };
-	            _didChange.addition = true;
-	            return;
-	        }
+	      var isAuthenticated = that.authenticated(); // 400 Bad Request, 401 Unauthorized, 403 Forbidden
+	      // Logout and retry the request..
 
-	        if (h && b) {
-	            if (h.members && b.members && !fastDeepEqual(h.members, b.members)) {
-	                _changes[id] = { base: b, head: h };
-	                _didChange.geometry = true;
-	                _didChange.properties = true;
-	                return;
-	            }
-	            if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
-	                _changes[id] = { base: b, head: h };
-	                _didChange.geometry = true;
-	            }
-	            if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
-	                _changes[id] = { base: b, head: h };
-	                _didChange.geometry = true;
-	            }
-	            if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
-	                _changes[id] = { base: b, head: h };
-	                _didChange.properties = true;
+	      if (isAuthenticated && err && err.status && (err.status === 400 || err.status === 401 || err.status === 403)) {
+	        that.logout();
+	        that.loadFromAPI(path, callback, options); // else, no retry..
+	      } else {
+	        // 509 Bandwidth Limit Exceeded, 429 Too Many Requests
+	        // Set the rateLimitError flag and trigger a warning..
+	        if (!isAuthenticated && !_rateLimitError && err && err.status && (err.status === 509 || err.status === 429)) {
+	          _rateLimitError = err;
+	          dispatch$6.call('change');
+	          that.reloadApiStatus();
+	        } else if (err && _cachedApiStatus === 'online' || !err && _cachedApiStatus !== 'online') {
+	          // If the response's error state doesn't match the status,
+	          // it's likely we lost or gained the connection so reload the status
+	          that.reloadApiStatus();
+	        }
+
+	        if (callback) {
+	          if (err) {
+	            return callback(err);
+	          } else {
+	            if (path.indexOf('.json') !== -1) {
+	              return parseJSON(payload, callback, options);
+	            } else {
+	              return parseXML(payload, callback, options);
 	            }
+	          }
 	        }
+	      }
 	    }
 
-	    function load() {
-	        // HOT CODE: there can be many thousands of downloaded entities, so looping
-	        // through them all can become a performance bottleneck. Optimize by
-	        // resolving duplicates and using a basic `for` loop
-	        var ids = utilArrayUniq(Object.keys(head.entities).concat(Object.keys(base.entities)));
-	        for (var i = 0; i < ids.length; i++) {
-	            checkEntityID(ids[i]);
+	    if (this.authenticated()) {
+	      return oauth.xhr({
+	        method: 'GET',
+	        path: path
+	      }, done);
+	    } else {
+	      var url = urlroot + path;
+	      var controller = new AbortController();
+	      d3_json(url, {
+	        signal: controller.signal
+	      }).then(function (data) {
+	        done(null, data);
+	      })["catch"](function (err) {
+	        if (err.name === 'AbortError') return; // d3-fetch includes status in the error message,
+	        // but we can't access the response itself
+	        // https://github.com/d3/d3-fetch/issues/27
+
+	        var match = err.message.match(/^\d{3}/);
+
+	        if (match) {
+	          done({
+	            status: +match[0],
+	            statusText: err.message
+	          });
+	        } else {
+	          done(err.message);
 	        }
+	      });
+	      return controller;
 	    }
-	    load();
-
-
-	    _diff.length = function length() {
-	        return Object.keys(_changes).length;
+	  },
+	  // Load a single entity by id (ways and relations use the `/full` call)
+	  // GET /api/0.6/node/#id
+	  // GET /api/0.6/[way|relation]/#id/full
+	  loadEntity: function loadEntity(id, callback) {
+	    var type = osmEntity.id.type(id);
+	    var osmID = osmEntity.id.toOSM(id);
+	    var options = {
+	      skipSeen: false
 	    };
-
-
-	    _diff.changes = function changes() {
-	        return _changes;
+	    this.loadFromAPI('/api/0.6/' + type + '/' + osmID + (type !== 'node' ? '/full' : '') + '.json', function (err, entities) {
+	      if (callback) callback(err, {
+	        data: entities
+	      });
+	    }, options);
+	  },
+	  // Load a single entity with a specific version
+	  // GET /api/0.6/[node|way|relation]/#id/#version
+	  loadEntityVersion: function loadEntityVersion(id, version, callback) {
+	    var type = osmEntity.id.type(id);
+	    var osmID = osmEntity.id.toOSM(id);
+	    var options = {
+	      skipSeen: false
 	    };
+	    this.loadFromAPI('/api/0.6/' + type + '/' + osmID + '/' + version + '.json', function (err, entities) {
+	      if (callback) callback(err, {
+	        data: entities
+	      });
+	    }, options);
+	  },
+	  // Load multiple entities in chunks
+	  // (note: callback may be called multiple times)
+	  // Unlike `loadEntity`, child nodes and members are not fetched
+	  // GET /api/0.6/[nodes|ways|relations]?#parameters
+	  loadMultiple: function loadMultiple(ids, callback) {
+	    var that = this;
+	    var groups = utilArrayGroupBy(utilArrayUniq(ids), osmEntity.id.type);
+	    Object.keys(groups).forEach(function (k) {
+	      var type = k + 's'; // nodes, ways, relations
 
-	    _diff.didChange = _didChange;
-
-
-	    // pass true to include affected relation members
-	    _diff.extantIDs = function extantIDs(includeRelMembers) {
-	        var result = new Set();
-	        Object.keys(_changes).forEach(function(id) {
-	            if (_changes[id].head) {
-	                result.add(id);
-	            }
-
-	            var h = _changes[id].head;
-	            var b = _changes[id].base;
-	            var entity = h || b;
-
-	            if (includeRelMembers && entity.type === 'relation') {
-	                var mh = h ? h.members.map(function(m) { return m.id; }) : [];
-	                var mb = b ? b.members.map(function(m) { return m.id; }) : [];
-	                utilArrayUnion(mh, mb).forEach(function(memberID) {
-	                    if (head.hasEntity(memberID)) {
-	                        result.add(memberID);
-	                    }
-	                });
-	            }
-	        });
+	      var osmIDs = groups[k].map(function (id) {
+	        return osmEntity.id.toOSM(id);
+	      });
+	      var options = {
+	        skipSeen: false
+	      };
+	      utilArrayChunk(osmIDs, 150).forEach(function (arr) {
+	        that.loadFromAPI('/api/0.6/' + type + '.json?' + type + '=' + arr.join(), function (err, entities) {
+	          if (callback) callback(err, {
+	            data: entities
+	          });
+	        }, options);
+	      });
+	    });
+	  },
+	  // Create, upload, and close a changeset
+	  // PUT /api/0.6/changeset/create
+	  // POST /api/0.6/changeset/#id/upload
+	  // PUT /api/0.6/changeset/#id/close
+	  putChangeset: function putChangeset(changeset, changes, callback) {
+	    var cid = _connectionID;
+
+	    if (_changeset.inflight) {
+	      return callback({
+	        message: 'Changeset already inflight',
+	        status: -2
+	      }, changeset);
+	    } else if (_changeset.open) {
+	      // reuse existing open changeset..
+	      return createdChangeset.call(this, null, _changeset.open);
+	    } else {
+	      // Open a new changeset..
+	      var options = {
+	        method: 'PUT',
+	        path: '/api/0.6/changeset/create',
+	        options: {
+	          header: {
+	            'Content-Type': 'text/xml'
+	          }
+	        },
+	        content: JXON.stringify(changeset.asJXON())
+	      };
+	      _changeset.inflight = oauth.xhr(options, wrapcb(this, createdChangeset, cid));
+	    }
 
-	        return Array.from(result);
-	    };
+	    function createdChangeset(err, changesetID) {
+	      _changeset.inflight = null;
 
+	      if (err) {
+	        return callback(err, changeset);
+	      }
 
-	    _diff.modified = function modified() {
-	        var result = [];
-	        Object.values(_changes).forEach(function(change) {
-	            if (change.base && change.head) {
-	                result.push(change.head);
-	            }
-	        });
-	        return result;
-	    };
+	      _changeset.open = changesetID;
+	      changeset = changeset.update({
+	        id: changesetID
+	      }); // Upload the changeset..
 
+	      var options = {
+	        method: 'POST',
+	        path: '/api/0.6/changeset/' + changesetID + '/upload',
+	        options: {
+	          header: {
+	            'Content-Type': 'text/xml'
+	          }
+	        },
+	        content: JXON.stringify(changeset.osmChangeJXON(changes))
+	      };
+	      _changeset.inflight = oauth.xhr(options, wrapcb(this, uploadedChangeset, cid));
+	    }
 
-	    _diff.created = function created() {
-	        var result = [];
-	        Object.values(_changes).forEach(function(change) {
-	            if (!change.base && change.head) {
-	                result.push(change.head);
-	            }
-	        });
-	        return result;
-	    };
+	    function uploadedChangeset(err) {
+	      _changeset.inflight = null;
+	      if (err) return callback(err, changeset); // Upload was successful, safe to call the callback.
+	      // Add delay to allow for postgres replication #1646 #2678
 
+	      window.setTimeout(function () {
+	        callback(null, changeset);
+	      }, 2500);
+	      _changeset.open = null; // At this point, we don't really care if the connection was switched..
+	      // Only try to close the changeset if we're still talking to the same server.
 
-	    _diff.deleted = function deleted() {
-	        var result = [];
-	        Object.values(_changes).forEach(function(change) {
-	            if (change.base && !change.head) {
-	                result.push(change.base);
+	      if (this.getConnectionId() === cid) {
+	        // Still attempt to close changeset, but ignore response because #2667
+	        oauth.xhr({
+	          method: 'PUT',
+	          path: '/api/0.6/changeset/' + changeset.id + '/close',
+	          options: {
+	            header: {
+	              'Content-Type': 'text/xml'
 	            }
+	          }
+	        }, function () {
+	          return true;
 	        });
-	        return result;
-	    };
+	      }
+	    }
+	  },
+	  // Load multiple users in chunks
+	  // (note: callback may be called multiple times)
+	  // GET /api/0.6/users?users=#id1,#id2,...,#idn
+	  loadUsers: function loadUsers(uids, callback) {
+	    var toLoad = [];
+	    var cached = [];
+	    utilArrayUniq(uids).forEach(function (uid) {
+	      if (_userCache.user[uid]) {
+	        delete _userCache.toLoad[uid];
+	        cached.push(_userCache.user[uid]);
+	      } else {
+	        toLoad.push(uid);
+	      }
+	    });
 
+	    if (cached.length || !this.authenticated()) {
+	      callback(undefined, cached);
+	      if (!this.authenticated()) return; // require auth
+	    }
 
-	    _diff.summary = function summary() {
-	        var relevant = {};
+	    utilArrayChunk(toLoad, 150).forEach(function (arr) {
+	      oauth.xhr({
+	        method: 'GET',
+	        path: '/api/0.6/users?users=' + arr.join()
+	      }, wrapcb(this, done, _connectionID));
+	    }.bind(this));
 
-	        var keys = Object.keys(_changes);
-	        for (var i = 0; i < keys.length; i++) {
-	            var change = _changes[keys[i]];
+	    function done(err, xml) {
+	      if (err) {
+	        return callback(err);
+	      }
 
-	            if (change.head && change.head.geometry(head) !== 'vertex') {
-	                addEntity(change.head, head, change.base ? 'modified' : 'created');
+	      var options = {
+	        skipSeen: true
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
+	        } else {
+	          return callback(undefined, results);
+	        }
+	      }, options);
+	    }
+	  },
+	  // Load a given user by id
+	  // GET /api/0.6/user/#id
+	  loadUser: function loadUser(uid, callback) {
+	    if (_userCache.user[uid] || !this.authenticated()) {
+	      // require auth
+	      delete _userCache.toLoad[uid];
+	      return callback(undefined, _userCache.user[uid]);
+	    }
 
-	            } else if (change.base && change.base.geometry(base) !== 'vertex') {
-	                addEntity(change.base, base, 'deleted');
+	    oauth.xhr({
+	      method: 'GET',
+	      path: '/api/0.6/user/' + uid
+	    }, wrapcb(this, done, _connectionID));
 
-	            } else if (change.base && change.head) { // modified vertex
-	                var moved    = !fastDeepEqual(change.base.loc,  change.head.loc);
-	                var retagged = !fastDeepEqual(change.base.tags, change.head.tags);
+	    function done(err, xml) {
+	      if (err) {
+	        return callback(err);
+	      }
 
-	                if (moved) {
-	                    addParents(change.head);
-	                }
+	      var options = {
+	        skipSeen: true
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
+	        } else {
+	          return callback(undefined, results[0]);
+	        }
+	      }, options);
+	    }
+	  },
+	  // Load the details of the logged-in user
+	  // GET /api/0.6/user/details
+	  userDetails: function userDetails(callback) {
+	    if (_userDetails) {
+	      // retrieve cached
+	      return callback(undefined, _userDetails);
+	    }
 
-	                if (retagged || (moved && change.head.hasInterestingTags())) {
-	                    addEntity(change.head, head, 'modified');
-	                }
+	    oauth.xhr({
+	      method: 'GET',
+	      path: '/api/0.6/user/details'
+	    }, wrapcb(this, done, _connectionID));
 
-	            } else if (change.head && change.head.hasInterestingTags()) { // created vertex
-	                addEntity(change.head, head, 'created');
+	    function done(err, xml) {
+	      if (err) {
+	        return callback(err);
+	      }
 
-	            } else if (change.base && change.base.hasInterestingTags()) { // deleted vertex
-	                addEntity(change.base, base, 'deleted');
-	            }
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
+	        } else {
+	          _userDetails = results[0];
+	          return callback(undefined, _userDetails);
 	        }
+	      }, options);
+	    }
+	  },
+	  // Load previous changesets for the logged in user
+	  // GET /api/0.6/changesets?user=#id
+	  userChangesets: function userChangesets(callback) {
+	    if (_userChangesets) {
+	      // retrieve cached
+	      return callback(undefined, _userChangesets);
+	    }
 
-	        return Object.values(relevant);
-
+	    this.userDetails(wrapcb(this, gotDetails, _connectionID));
 
-	        function addEntity(entity, graph, changeType) {
-	            relevant[entity.id] = {
-	                entity: entity,
-	                graph: graph,
-	                changeType: changeType
-	            };
-	        }
+	    function gotDetails(err, user) {
+	      if (err) {
+	        return callback(err);
+	      }
 
-	        function addParents(entity) {
-	            var parents = head.parentWays(entity);
-	            for (var j = parents.length - 1; j >= 0; j--) {
-	                var parent = parents[j];
-	                if (!(parent.id in relevant)) {
-	                    addEntity(parent, head, 'modified');
-	                }
-	            }
-	        }
-	    };
+	      oauth.xhr({
+	        method: 'GET',
+	        path: '/api/0.6/changesets?user=' + user.id
+	      }, wrapcb(this, done, _connectionID));
+	    }
 
+	    function done(err, xml) {
+	      if (err) {
+	        return callback(err);
+	      }
 
-	    // returns complete set of entities that require a redraw
-	    //  (optionally within given `extent`)
-	    _diff.complete = function complete(extent) {
-	        var result = {};
-	        var id, change;
+	      _userChangesets = Array.prototype.map.call(xml.getElementsByTagName('changeset'), function (changeset) {
+	        return {
+	          tags: getTags(changeset)
+	        };
+	      }).filter(function (changeset) {
+	        var comment = changeset.tags.comment;
+	        return comment && comment !== '';
+	      });
+	      return callback(undefined, _userChangesets);
+	    }
+	  },
+	  // Fetch the status of the OSM API
+	  // GET /api/capabilities
+	  status: function status(callback) {
+	    var url = urlroot + '/api/capabilities';
+	    var errback = wrapcb(this, done, _connectionID);
+	    d3_xml(url).then(function (data) {
+	      errback(null, data);
+	    })["catch"](function (err) {
+	      errback(err.message);
+	    });
 
-	        for (id in _changes) {
-	            change = _changes[id];
+	    function done(err, xml) {
+	      if (err) {
+	        // the status is null if no response could be retrieved
+	        return callback(err, null);
+	      } // update blocklists
 
-	            var h = change.head;
-	            var b = change.base;
-	            var entity = h || b;
-	            var i;
 
-	            if (extent &&
-	                (!h || !h.intersects(extent, head)) &&
-	                (!b || !b.intersects(extent, base)))
-	                { continue; }
+	      var elements = xml.getElementsByTagName('blacklist');
+	      var regexes = [];
 
-	            result[id] = h;
+	      for (var i = 0; i < elements.length; i++) {
+	        var regexString = elements[i].getAttribute('regex'); // needs unencode?
 
-	            if (entity.type === 'way') {
-	                var nh = h ? h.nodes : [];
-	                var nb = b ? b.nodes : [];
-	                var diff;
+	        if (regexString) {
+	          try {
+	            var regex = new RegExp(regexString);
+	            regexes.push(regex);
+	          } catch (e) {
+	            /* noop */
+	          }
+	        }
+	      }
 
-	                diff = utilArrayDifference(nh, nb);
-	                for (i = 0; i < diff.length; i++) {
-	                    result[diff[i]] = head.hasEntity(diff[i]);
-	                }
+	      if (regexes.length) {
+	        _imageryBlocklists = regexes;
+	      }
 
-	                diff = utilArrayDifference(nb, nh);
-	                for (i = 0; i < diff.length; i++) {
-	                    result[diff[i]] = head.hasEntity(diff[i]);
-	                }
-	            }
+	      if (_rateLimitError) {
+	        return callback(_rateLimitError, 'rateLimited');
+	      } else {
+	        var waynodes = xml.getElementsByTagName('waynodes');
+	        var maxWayNodes = waynodes.length && parseInt(waynodes[0].getAttribute('maximum'), 10);
+	        if (maxWayNodes && isFinite(maxWayNodes)) _maxWayNodes = maxWayNodes;
+	        var apiStatus = xml.getElementsByTagName('status');
+	        var val = apiStatus[0].getAttribute('api');
+	        return callback(undefined, val);
+	      }
+	    }
+	  },
+	  // Calls `status` and dispatches an `apiStatusChange` event if the returned
+	  // status differs from the cached status.
+	  reloadApiStatus: function reloadApiStatus() {
+	    // throttle to avoid unnecessary API calls
+	    if (!this.throttledReloadApiStatus) {
+	      var that = this;
+	      this.throttledReloadApiStatus = throttle(function () {
+	        that.status(function (err, status) {
+	          if (status !== _cachedApiStatus) {
+	            _cachedApiStatus = status;
+	            dispatch$6.call('apiStatusChange', that, err, status);
+	          }
+	        });
+	      }, 500);
+	    }
 
-	            if (entity.type === 'relation' && entity.isMultipolygon()) {
-	                var mh = h ? h.members.map(function(m) { return m.id; }) : [];
-	                var mb = b ? b.members.map(function(m) { return m.id; }) : [];
-	                var ids = utilArrayUnion(mh, mb);
-	                for (i = 0; i < ids.length; i++) {
-	                    var member = head.hasEntity(ids[i]);
-	                    if (!member) { continue; }   // not downloaded
-	                    if (extent && !member.intersects(extent, head)) { continue; }   // not visible
-	                    result[ids[i]] = member;
-	                }
-	            }
+	    this.throttledReloadApiStatus();
+	  },
+	  // Returns the maximum number of nodes a single way can have
+	  maxWayNodes: function maxWayNodes() {
+	    return _maxWayNodes;
+	  },
+	  // Load data (entities) from the API in tiles
+	  // GET /api/0.6/map?bbox=
+	  loadTiles: function loadTiles(projection, callback) {
+	    if (_off) return; // determine the needed tiles to cover the view
 
-	            addParents(head.parentWays(entity), result);
-	            addParents(head.parentRelations(entity), result);
-	        }
+	    var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	        return result;
+	    var hadRequests = hasInflightRequests(_tileCache);
+	    abortUnwantedRequests$3(_tileCache, tiles);
 
+	    if (hadRequests && !hasInflightRequests(_tileCache)) {
+	      dispatch$6.call('loaded'); // stop the spinner
+	    } // issue new requests..
 
-	        function addParents(parents, result) {
-	            for (var i = 0; i < parents.length; i++) {
-	                var parent = parents[i];
-	                if (parent.id in result) { continue; }
 
-	                result[parent.id] = parent;
-	                addParents(head.parentRelations(parent), result);
-	            }
-	        }
-	    };
+	    tiles.forEach(function (tile) {
+	      this.loadTile(tile, callback);
+	    }, this);
+	  },
+	  // Load a single data tile
+	  // GET /api/0.6/map?bbox=
+	  loadTile: function loadTile(tile, callback) {
+	    if (_off) return;
+	    if (_tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
 
+	    if (!hasInflightRequests(_tileCache)) {
+	      dispatch$6.call('loading'); // start the spinner
+	    }
 
-	    return _diff;
-	}
+	    var path = '/api/0.6/map.json?bbox=';
+	    var options = {
+	      skipSeen: true
+	    };
+	    _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);
 
-	function coreTree(head) {
-	    // tree for entities
-	    var _rtree = new RBush();
-	    var _bboxes = {};
+	    function tileCallback(err, parsed) {
+	      delete _tileCache.inflight[tile.id];
 
-	    // maintain a separate tree for granular way segments
-	    var _segmentsRTree = new RBush();
-	    var _segmentsBBoxes = {};
-	    var _segmentsByWayId = {};
+	      if (!err) {
+	        delete _tileCache.toLoad[tile.id];
+	        _tileCache.loaded[tile.id] = true;
+	        var bbox = tile.extent.bbox();
+	        bbox.id = tile.id;
 
-	    var tree = {};
+	        _tileCache.rtree.insert(bbox);
+	      }
 
+	      if (callback) {
+	        callback(err, Object.assign({
+	          data: parsed
+	        }, tile));
+	      }
 
-	    function entityBBox(entity) {
-	        var bbox = entity.extent(head).bbox();
-	        bbox.id = entity.id;
-	        _bboxes[entity.id] = bbox;
-	        return bbox;
+	      if (!hasInflightRequests(_tileCache)) {
+	        dispatch$6.call('loaded'); // stop the spinner
+	      }
 	    }
+	  },
+	  isDataLoaded: function isDataLoaded(loc) {
+	    var bbox = {
+	      minX: loc[0],
+	      minY: loc[1],
+	      maxX: loc[0],
+	      maxY: loc[1]
+	    };
+	    return _tileCache.rtree.collides(bbox);
+	  },
+	  // load the tile that covers the given `loc`
+	  loadTileAtLoc: function loadTileAtLoc(loc, callback) {
+	    // Back off if the toLoad queue is filling up.. re #6417
+	    // (Currently `loadTileAtLoc` requests are considered low priority - used by operations to
+	    // let users safely edit geometries which extend to unloaded tiles.  We can drop some.)
+	    if (Object.keys(_tileCache.toLoad).length > 50) return;
+	    var k = geoZoomToScale(_tileZoom$3 + 1);
+	    var offset = geoRawMercator().scale(k)(loc);
+	    var projection = geoRawMercator().transform({
+	      k: k,
+	      x: -offset[0],
+	      y: -offset[1]
+	    });
+	    var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection);
+	    tiles.forEach(function (tile) {
+	      if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
+	      _tileCache.toLoad[tile.id] = true;
+	      this.loadTile(tile, callback);
+	    }, this);
+	  },
+	  // Load notes from the API in tiles
+	  // GET /api/0.6/notes?bbox=
+	  loadNotes: function loadNotes(projection, noteOptions) {
+	    noteOptions = Object.assign({
+	      limit: 10000,
+	      closed: 7
+	    }, noteOptions);
+	    if (_off) return;
+	    var that = this;
+	    var path = '/api/0.6/notes?limit=' + noteOptions.limit + '&closed=' + noteOptions.closed + '&bbox=';
 
+	    var throttleLoadUsers = throttle(function () {
+	      var uids = Object.keys(_userCache.toLoad);
+	      if (!uids.length) return;
+	      that.loadUsers(uids, function () {}); // eagerly load user details
+	    }, 750); // determine the needed tiles to cover the view
 
-	    function segmentBBox(segment) {
-	        var extent = segment.extent(head);
-	        // extent can be null if the node entites aren't in the graph for some reason
-	        if (!extent) { return null; }
 
-	        var bbox = extent.bbox();
-	        bbox.segment = segment;
-	        _segmentsBBoxes[segment.id] = bbox;
-	        return bbox;
-	    }
+	    var tiles = tiler$5.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
+	    abortUnwantedRequests$3(_noteCache, tiles); // issue new requests..
 
-	    function removeEntity(entity) {
-	        _rtree.remove(_bboxes[entity.id]);
-	        delete _bboxes[entity.id];
+	    tiles.forEach(function (tile) {
+	      if (_noteCache.loaded[tile.id] || _noteCache.inflight[tile.id]) return;
+	      var options = {
+	        skipSeen: false
+	      };
+	      _noteCache.inflight[tile.id] = that.loadFromAPI(path + tile.extent.toParam(), function (err) {
+	        delete _noteCache.inflight[tile.id];
 
-	        if (_segmentsByWayId[entity.id]) {
-	            _segmentsByWayId[entity.id].forEach(function(segment) {
-	                _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
-	                delete _segmentsBBoxes[segment.id];
-	            });
-	            delete _segmentsByWayId[entity.id];
+	        if (!err) {
+	          _noteCache.loaded[tile.id] = true;
 	        }
-	    }
 
+	        throttleLoadUsers();
+	        dispatch$6.call('loadedNotes');
+	      }, options);
+	    });
+	  },
+	  // Create a note
+	  // POST /api/0.6/notes?params
+	  postNoteCreate: function postNoteCreate(note, callback) {
+	    if (!this.authenticated()) {
+	      return callback({
+	        message: 'Not Authenticated',
+	        status: -3
+	      }, note);
+	    }
 
-	    function loadEntities(entities) {
-	        _rtree.load(entities.map(entityBBox));
-
-	        var segments = [];
-	        entities.forEach(function(entity) {
-	            if (entity.segments) {
-	                var entitySegments = entity.segments(head);
-	                // cache these to make them easy to remove later
-	                _segmentsByWayId[entity.id] = entitySegments;
-	                segments = segments.concat(entitySegments);
-	            }
-	        });
-	        if (segments.length) { _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean)); }
+	    if (_noteCache.inflightPost[note.id]) {
+	      return callback({
+	        message: 'Note update already inflight',
+	        status: -2
+	      }, note);
 	    }
 
+	    if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required
 
-	    function updateParents(entity, insertions, memo) {
-	        head.parentWays(entity).forEach(function(way) {
-	            if (_bboxes[way.id]) {
-	                removeEntity(way);
-	                insertions[way.id] = way;
-	            }
-	            updateParents(way, insertions, memo);
-	        });
+	    var comment = note.newComment;
 
-	        head.parentRelations(entity).forEach(function(relation) {
-	            if (memo[entity.id]) { return; }
-	            memo[entity.id] = true;
-	            if (_bboxes[relation.id]) {
-	                removeEntity(relation);
-	                insertions[relation.id] = relation;
-	            }
-	            updateParents(relation, insertions, memo);
-	        });
+	    if (note.newCategory && note.newCategory !== 'None') {
+	      comment += ' #' + note.newCategory;
 	    }
 
+	    var path = '/api/0.6/notes?' + utilQsString({
+	      lon: note.loc[0],
+	      lat: note.loc[1],
+	      text: comment
+	    });
+	    _noteCache.inflightPost[note.id] = oauth.xhr({
+	      method: 'POST',
+	      path: path
+	    }, wrapcb(this, done, _connectionID));
 
-	    tree.rebase = function(entities, force) {
-	        var insertions = {};
+	    function done(err, xml) {
+	      delete _noteCache.inflightPost[note.id];
 
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            if (!entity.visible) { continue; }
+	      if (err) {
+	        return callback(err);
+	      } // we get the updated note back, remove from caches and reparse..
 
-	            if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
-	                if (!force) {
-	                    continue;
-	                } else if (_bboxes[entity.id]) {
-	                    removeEntity(entity);
-	                }
-	            }
 
-	            insertions[entity.id] = entity;
-	            updateParents(entity, insertions, {});
+	      this.removeNote(note);
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
+	        } else {
+	          return callback(undefined, results[0]);
 	        }
+	      }, options);
+	    }
+	  },
+	  // Update a note
+	  // POST /api/0.6/notes/#id/comment?text=comment
+	  // POST /api/0.6/notes/#id/close?text=comment
+	  // POST /api/0.6/notes/#id/reopen?text=comment
+	  postNoteUpdate: function postNoteUpdate(note, newStatus, callback) {
+	    if (!this.authenticated()) {
+	      return callback({
+	        message: 'Not Authenticated',
+	        status: -3
+	      }, note);
+	    }
+
+	    if (_noteCache.inflightPost[note.id]) {
+	      return callback({
+	        message: 'Note update already inflight',
+	        status: -2
+	      }, note);
+	    }
+
+	    var action;
+
+	    if (note.status !== 'closed' && newStatus === 'closed') {
+	      action = 'close';
+	    } else if (note.status !== 'open' && newStatus === 'open') {
+	      action = 'reopen';
+	    } else {
+	      action = 'comment';
+	      if (!note.newComment) return; // when commenting, comment required
+	    }
 
-	        loadEntities(Object.values(insertions));
-
-	        return tree;
-	    };
+	    var path = '/api/0.6/notes/' + note.id + '/' + action;
 
+	    if (note.newComment) {
+	      path += '?' + utilQsString({
+	        text: note.newComment
+	      });
+	    }
 
-	    function updateToGraph(graph) {
-	        if (graph === head) { return; }
+	    _noteCache.inflightPost[note.id] = oauth.xhr({
+	      method: 'POST',
+	      path: path
+	    }, wrapcb(this, done, _connectionID));
 
-	        var diff = coreDifference(head, graph);
+	    function done(err, xml) {
+	      delete _noteCache.inflightPost[note.id];
 
-	        head = graph;
+	      if (err) {
+	        return callback(err);
+	      } // we get the updated note back, remove from caches and reparse..
 
-	        var changed = diff.didChange;
-	        if (!changed.addition && !changed.deletion && !changed.geometry) { return; }
 
-	        var insertions = {};
+	      this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag
 
-	        if (changed.deletion) {
-	            diff.deleted().forEach(function(entity) {
-	                removeEntity(entity);
-	            });
-	        }
+	      if (action === 'close') {
+	        _noteCache.closed[note.id] = true;
+	      } else if (action === 'reopen') {
+	        delete _noteCache.closed[note.id];
+	      }
 
-	        if (changed.geometry) {
-	            diff.modified().forEach(function(entity) {
-	                removeEntity(entity);
-	                insertions[entity.id] = entity;
-	                updateParents(entity, insertions, {});
-	            });
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
+	        } else {
+	          return callback(undefined, results[0]);
 	        }
-
-	        if (changed.addition) {
-	            diff.created().forEach(function(entity) {
-	                insertions[entity.id] = entity;
-	            });
+	      }, options);
+	    }
+	  },
+	  "switch": function _switch(options) {
+	    urlroot = options.urlroot;
+	    oauth.options(Object.assign({
+	      url: urlroot,
+	      loading: authLoading,
+	      done: authDone
+	    }, options));
+	    this.reset();
+	    this.userChangesets(function () {}); // eagerly load user details/changesets
+
+	    dispatch$6.call('change');
+	    return this;
+	  },
+	  toggle: function toggle(val) {
+	    _off = !val;
+	    return this;
+	  },
+	  isChangesetInflight: function isChangesetInflight() {
+	    return !!_changeset.inflight;
+	  },
+	  // get/set cached data
+	  // This is used to save/restore the state when entering/exiting the walkthrough
+	  // Also used for testing purposes.
+	  caches: function caches(obj) {
+	    function cloneCache(source) {
+	      var target = {};
+	      Object.keys(source).forEach(function (k) {
+	        if (k === 'rtree') {
+	          target.rtree = new RBush().fromJSON(source.rtree.toJSON()); // clone rbush
+	        } else if (k === 'note') {
+	          target.note = {};
+	          Object.keys(source.note).forEach(function (id) {
+	            target.note[id] = osmNote(source.note[id]); // copy notes
+	          });
+	        } else {
+	          target[k] = JSON.parse(JSON.stringify(source[k])); // clone deep
 	        }
-
-	        loadEntities(Object.values(insertions));
+	      });
+	      return target;
 	    }
 
-	    // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
-	    tree.intersects = function(extent, graph) {
-	        updateToGraph(graph);
-	        return _rtree.search(extent.bbox())
-	            .map(function(bbox) { return graph.entity(bbox.id); });
-	    };
-
-	    // returns an array of segment objects with bounding boxes overlapping `extent` for the given `graph`
-	    tree.waySegments = function(extent, graph) {
-	        updateToGraph(graph);
-	        return _segmentsRTree.search(extent.bbox())
-	            .map(function(bbox) { return bbox.segment; });
-	    };
-
-
-	    return tree;
-	}
-
-	function uiModal(selection, blocking) {
-	  var this$1 = this;
-
-	  var keybinding = utilKeybinding('modal');
-	  var previous = selection.select('div.modal');
-	  var animate = previous.empty();
+	    if (!arguments.length) {
+	      return {
+	        tile: cloneCache(_tileCache),
+	        note: cloneCache(_noteCache),
+	        user: cloneCache(_userCache)
+	      };
+	    } // access caches directly for testing (e.g., loading notes rtree)
 
-	  previous.transition()
-	    .duration(200)
-	    .style('opacity', 0)
-	    .remove();
 
-	  var shaded = selection
-	    .append('div')
-	    .attr('class', 'shaded')
-	    .style('opacity', 0);
+	    if (obj === 'get') {
+	      return {
+	        tile: _tileCache,
+	        note: _noteCache,
+	        user: _userCache
+	      };
+	    }
 
-	  shaded.close = function () {
-	    shaded
-	      .transition()
-	      .duration(200)
-	      .style('opacity',0)
-	      .remove();
+	    if (obj.tile) {
+	      _tileCache = obj.tile;
+	      _tileCache.inflight = {};
+	    }
 
-	    modal
-	      .transition()
-	      .duration(200)
-	      .style('top','0px');
+	    if (obj.note) {
+	      _noteCache = obj.note;
+	      _noteCache.inflight = {};
+	      _noteCache.inflightPost = {};
+	    }
 
-	    select(document)
-	      .call(keybinding.unbind);
-	  };
+	    if (obj.user) {
+	      _userCache = obj.user;
+	    }
 
+	    return this;
+	  },
+	  logout: function logout() {
+	    _userChangesets = undefined;
+	    _userDetails = undefined;
+	    oauth.logout();
+	    dispatch$6.call('change');
+	    return this;
+	  },
+	  authenticated: function authenticated() {
+	    return oauth.authenticated();
+	  },
+	  authenticate: function authenticate(callback) {
+	    var that = this;
+	    var cid = _connectionID;
+	    _userChangesets = undefined;
+	    _userDetails = undefined;
 
-	  var modal = shaded
-	    .append('div')
-	    .attr('class', 'modal fillL');
+	    function done(err, res) {
+	      if (err) {
+	        if (callback) callback(err);
+	        return;
+	      }
 
-	  if (!blocking) {
-	    shaded.on('click.remove-modal', function () {
-	      if (event.target === this$1) {
-	        shaded.close();
+	      if (that.getConnectionId() !== cid) {
+	        if (callback) callback({
+	          message: 'Connection Switched',
+	          status: -1
+	        });
+	        return;
 	      }
-	    });
 
-	    modal
-	      .append('button')
-	      .attr('class', 'close')
-	      .on('click', shaded.close)
-	      .call(svgIcon('#iD-icon-close'));
+	      _rateLimitError = undefined;
+	      dispatch$6.call('change');
+	      if (callback) callback(err, res);
+	      that.userChangesets(function () {}); // eagerly load user details/changesets
+	    }
 
-	    keybinding
-	      .on('⌫', shaded.close)
-	      .on('⎋', shaded.close);
+	    return oauth.authenticate(done);
+	  },
+	  imageryBlocklists: function imageryBlocklists() {
+	    return _imageryBlocklists;
+	  },
+	  tileZoom: function tileZoom(val) {
+	    if (!arguments.length) return _tileZoom$3;
+	    _tileZoom$3 = val;
+	    return this;
+	  },
+	  // get all cached notes covering the viewport
+	  notes: function notes(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    return _noteCache.rtree.search(bbox).map(function (d) {
+	      return d.data;
+	    });
+	  },
+	  // get a single note from the cache
+	  getNote: function getNote(id) {
+	    return _noteCache.note[id];
+	  },
+	  // remove a single note from the cache
+	  removeNote: function removeNote(note) {
+	    if (!(note instanceof osmNote) || !note.id) return;
+	    delete _noteCache.note[note.id];
+	    updateRtree$3(encodeNoteRtree(note), false); // false = remove
+	  },
+	  // replace a single note in the cache
+	  replaceNote: function replaceNote(note) {
+	    if (!(note instanceof osmNote) || !note.id) return;
+	    _noteCache.note[note.id] = note;
+	    updateRtree$3(encodeNoteRtree(note), true); // true = replace
 
-	    select(document)
-	      .call(keybinding);
+	    return note;
+	  },
+	  // Get an array of note IDs closed during this session.
+	  // Used to populate `closed:note` changeset tag
+	  getClosedIDs: function getClosedIDs() {
+	    return Object.keys(_noteCache.closed).sort();
 	  }
+	};
 
-	  modal
-	    .append('div')
-	    .attr('class', 'content');
+	var _apibase = 'https://wiki.openstreetmap.org/w/api.php';
+	var _inflight$1 = {};
+	var _wikibaseCache = {};
+	var _localeIDs = {
+	  en: false
+	};
 
-	  if (animate) {
-	    shaded.transition().style('opacity', 1);
-	  } else {
-	    shaded.style('opacity', 1);
-	  }
+	var debouncedRequest = debounce(request, 500, {
+	  leading: false
+	});
 
-	  return shaded;
+	function request(url, callback) {
+	  if (_inflight$1[url]) return;
+	  var controller = new AbortController();
+	  _inflight$1[url] = controller;
+	  d3_json(url, {
+	    signal: controller.signal
+	  }).then(function (result) {
+	    delete _inflight$1[url];
+	    if (callback) callback(null, result);
+	  })["catch"](function (err) {
+	    delete _inflight$1[url];
+	    if (err.name === 'AbortError') return;
+	    if (callback) callback(err.message);
+	  });
 	}
 
-	function uiLoading(context) {
-	  var _modalSelection = select(null);
-	  var _message = '';
-	  var _blocking = false;
-
-
-	  var loading = function (selection) {
-	    _modalSelection = uiModal(selection, _blocking);
-
-	    var loadertext = _modalSelection.select('.content')
-	      .classed('loading-modal', true)
-	      .append('div')
-	      .attr('class', 'modal-section fillL');
+	var serviceOsmWikibase = {
+	  init: function init() {
+	    _inflight$1 = {};
+	    _wikibaseCache = {};
+	    _localeIDs = {};
+	  },
+	  reset: function reset() {
+	    Object.values(_inflight$1).forEach(function (controller) {
+	      controller.abort();
+	    });
+	    _inflight$1 = {};
+	  },
 
-	    loadertext
-	      .append('img')
-	      .attr('class', 'loader')
-	      .attr('src', context.imagePath('loader-white.gif'));
+	  /**
+	   * Get the best value for the property, or undefined if not found
+	   * @param entity object from wikibase
+	   * @param property string e.g. 'P4' for image
+	   * @param langCode string e.g. 'fr' for French
+	   */
+	  claimToValue: function claimToValue(entity, property, langCode) {
+	    if (!entity.claims[property]) return undefined;
+	    var locale = _localeIDs[langCode];
+	    var preferredPick, localePick;
+	    entity.claims[property].forEach(function (stmt) {
+	      // If exists, use value limited to the needed language (has a qualifier P26 = locale)
+	      // Or if not found, use the first value with the "preferred" rank
+	      if (!preferredPick && stmt.rank === 'preferred') {
+	        preferredPick = stmt;
+	      }
 
-	    loadertext
-	      .append('h3')
-	      .text(_message);
+	      if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
+	        localePick = stmt;
+	      }
+	    });
+	    var result = localePick || preferredPick;
 
-	    _modalSelection.select('button.close')
-	      .attr('class', 'hide');
+	    if (result) {
+	      var datavalue = result.mainsnak.datavalue;
+	      return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
+	    } else {
+	      return undefined;
+	    }
+	  },
 
-	    return loading;
-	  };
+	  /**
+	   * Convert monolingual property into a key-value object (language -> value)
+	   * @param entity object from wikibase
+	   * @param property string e.g. 'P31' for monolingual wiki page title
+	   */
+	  monolingualClaimToValueObj: function monolingualClaimToValueObj(entity, property) {
+	    if (!entity || !entity.claims[property]) return undefined;
+	    return entity.claims[property].reduce(function (acc, obj) {
+	      var value = obj.mainsnak.datavalue.value;
+	      acc[value.language] = value.text;
+	      return acc;
+	    }, {});
+	  },
+	  toSitelink: function toSitelink(key, value) {
+	    var result = value ? 'Tag:' + key + '=' + value : 'Key:' + key;
+	    return result.replace(/_/g, ' ').trim();
+	  },
+	  //
+	  // Pass params object of the form:
+	  // {
+	  //   key: 'string',
+	  //   value: 'string',
+	  //   langCode: 'string'
+	  // }
+	  //
+	  getEntity: function getEntity(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest : request;
+	    var that = this;
+	    var titles = [];
+	    var result = {};
+	    var rtypeSitelink = params.key === 'type' && params.value ? ('Relation:' + params.value).replace(/_/g, ' ').trim() : false;
+	    var keySitelink = params.key ? this.toSitelink(params.key) : false;
+	    var tagSitelink = params.key && params.value ? this.toSitelink(params.key, params.value) : false;
+	    var localeSitelink;
+
+	    if (params.langCodes) {
+	      params.langCodes.forEach(function (langCode) {
+	        if (_localeIDs[langCode] === undefined) {
+	          // If this is the first time we are asking about this locale,
+	          // fetch corresponding entity (if it exists), and cache it.
+	          // If there is no such entry, cache `false` value to avoid re-requesting it.
+	          localeSitelink = ('Locale:' + langCode).replace(/_/g, ' ').trim();
+	          titles.push(localeSitelink);
+	        }
+	      });
+	    }
 
+	    if (rtypeSitelink) {
+	      if (_wikibaseCache[rtypeSitelink]) {
+	        result.rtype = _wikibaseCache[rtypeSitelink];
+	      } else {
+	        titles.push(rtypeSitelink);
+	      }
+	    }
 
-	  loading.message = function(val) {
-	    if (!arguments.length) { return _message; }
-	    _message = val;
-	    return loading;
-	  };
+	    if (keySitelink) {
+	      if (_wikibaseCache[keySitelink]) {
+	        result.key = _wikibaseCache[keySitelink];
+	      } else {
+	        titles.push(keySitelink);
+	      }
+	    }
 
+	    if (tagSitelink) {
+	      if (_wikibaseCache[tagSitelink]) {
+	        result.tag = _wikibaseCache[tagSitelink];
+	      } else {
+	        titles.push(tagSitelink);
+	      }
+	    }
 
-	  loading.blocking = function(val) {
-	    if (!arguments.length) { return _blocking; }
-	    _blocking = val;
-	    return loading;
-	  };
+	    if (!titles.length) {
+	      // Nothing to do, we already had everything in the cache
+	      return callback(null, result);
+	    } // Requesting just the user language code
+	    // If backend recognizes the code, it will perform proper fallbacks,
+	    // and the result will contain the requested code. If not, all values are returned:
+	    // {"zh-tw":{"value":"...","language":"zh-tw","source-language":"zh-hant"}
+	    // {"pt-br":{"value":"...","language":"pt","for-language":"pt-br"}}
 
 
-	  loading.close = function () {
-	    _modalSelection.remove();
-	  };
+	    var obj = {
+	      action: 'wbgetentities',
+	      sites: 'wiki',
+	      titles: titles.join('|'),
+	      languages: params.langCodes.join('|'),
+	      languagefallback: 1,
+	      origin: '*',
+	      format: 'json' // There is an MW Wikibase API bug https://phabricator.wikimedia.org/T212069
+	      // We shouldn't use v1 until it gets fixed, but should switch to it afterwards
+	      // formatversion: 2,
+
+	    };
+	    var url = _apibase + '?' + utilQsString(obj);
+	    doRequest(url, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else if (!d.success || d.error) {
+	        callback(d.error.messages.map(function (v) {
+	          return v.html['*'];
+	        }).join('<br>'));
+	      } else {
+	        var localeID = false;
+	        Object.values(d.entities).forEach(function (res) {
+	          if (res.missing !== '') {
+	            var title = res.sitelinks.wiki.title;
+
+	            if (title === rtypeSitelink) {
+	              _wikibaseCache[rtypeSitelink] = res;
+	              result.rtype = res;
+	            } else if (title === keySitelink) {
+	              _wikibaseCache[keySitelink] = res;
+	              result.key = res;
+	            } else if (title === tagSitelink) {
+	              _wikibaseCache[tagSitelink] = res;
+	              result.tag = res;
+	            } else if (title === localeSitelink) {
+	              localeID = res.id;
+	            } else {
+	              console.log('Unexpected title ' + title); // eslint-disable-line no-console
+	            }
+	          }
+	        });
 
+	        if (localeSitelink) {
+	          // If locale ID is not found, store false to prevent repeated queries
+	          that.addLocale(params.langCodes[0], localeID);
+	        }
 
-	  loading.isShown = function () {
-	    return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
-	  };
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  //
+	  // Pass params object of the form:
+	  // {
+	  //   key: 'string',     // required
+	  //   value: 'string'    // optional
+	  // }
+	  //
+	  // Get an result object used to display tag documentation
+	  // {
+	  //   title:        'string',
+	  //   description:  'string',
+	  //   editURL:      'string',
+	  //   imageURL:     'string',
+	  //   wiki:         { title: 'string', text: 'string', url: 'string' }
+	  // }
+	  //
+	  getDocs: function getDocs(params, callback) {
+	    var that = this;
+	    var langCodes = _mainLocalizer.localeCodes().map(function (code) {
+	      return code.toLowerCase();
+	    });
+	    params.langCodes = langCodes;
+	    this.getEntity(params, function (err, data) {
+	      if (err) {
+	        callback(err);
+	        return;
+	      }
 
+	      var entity = data.rtype || data.tag || data.key;
 
-	  return loading;
-	}
+	      if (!entity) {
+	        callback('No entity');
+	        return;
+	      }
 
-	function coreHistory(context) {
-	    var dispatch$1 = dispatch('change', 'merge', 'restore', 'undone', 'redone');
-	    var lock = utilSessionMutex('lock');
+	      var i;
+	      var description;
 
-	    // restorable if iD not open in another window/tab and a saved history exists in localStorage
-	    var _hasUnresolvedRestorableChanges = lock.lock() && !!corePreferences(getKey('saved_history'));
+	      for (i in langCodes) {
+	        var _code = langCodes[i];
 
-	    var duration = 150;
-	    var _imageryUsed = [];
-	    var _photoOverlaysUsed = [];
-	    var _checkpoints = {};
-	    var _pausedGraph;
-	    var _stack;
-	    var _index;
-	    var _tree;
+	        if (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
+	          description = entity.descriptions[_code];
+	          break;
+	        }
+	      }
 
+	      if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-	    // internal _act, accepts list of actions and eased time
-	    function _act(actions, t) {
-	        actions = Array.prototype.slice.call(actions);
+	      var result = {
+	        title: entity.title,
+	        description: description ? description.value : '',
+	        descriptionLocaleCode: description ? description.language : '',
+	        editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
+	      }; // add image
+
+	      if (entity.claims) {
+	        var imageroot;
+	        var image = that.claimToValue(entity, 'P4', langCodes[0]);
+
+	        if (image) {
+	          imageroot = 'https://commons.wikimedia.org/w/index.php';
+	        } else {
+	          image = that.claimToValue(entity, 'P28', langCodes[0]);
 
-	        var annotation;
-	        if (typeof actions[actions.length - 1] !== 'function') {
-	            annotation = actions.pop();
+	          if (image) {
+	            imageroot = 'https://wiki.openstreetmap.org/w/index.php';
+	          }
 	        }
 
-	        var graph = _stack[_index].graph;
-	        for (var i = 0; i < actions.length; i++) {
-	            graph = actions[i](graph, t);
+	        if (imageroot && image) {
+	          result.imageURL = imageroot + '?' + utilQsString({
+	            title: 'Special:Redirect/file/' + image,
+	            width: 400
+	          });
 	        }
+	      } // Try to get a wiki page from tag data item first, followed by the corresponding key data item.
+	      // If neither tag nor key data item contain a wiki page in the needed language nor English,
+	      // get the first found wiki page from either the tag or the key item.
 
-	        return {
-	            graph: graph,
-	            annotation: annotation,
-	            imageryUsed: _imageryUsed,
-	            photoOverlaysUsed: _photoOverlaysUsed,
-	            transform: context.projection.transform(),
-	            selectedIDs: context.selectedIDs()
-	        };
-	    }
-
-
-	    // internal _perform with eased time
-	    function _perform(args, t) {
-	        var previous = _stack[_index].graph;
-	        _stack = _stack.slice(0, _index + 1);
-	        var actionResult = _act(args, t);
-	        _stack.push(actionResult);
-	        _index++;
-	        return change(previous);
-	    }
 
+	      var rtypeWiki = that.monolingualClaimToValueObj(data.rtype, 'P31');
+	      var tagWiki = that.monolingualClaimToValueObj(data.tag, 'P31');
+	      var keyWiki = that.monolingualClaimToValueObj(data.key, 'P31');
+	      var wikis = [rtypeWiki, tagWiki, keyWiki];
 
-	    // internal _replace with eased time
-	    function _replace(args, t) {
-	        var previous = _stack[_index].graph;
-	        // assert(_index == _stack.length - 1)
-	        var actionResult = _act(args, t);
-	        _stack[_index] = actionResult;
-	        return change(previous);
-	    }
+	      for (i in wikis) {
+	        var wiki = wikis[i];
 
+	        for (var j in langCodes) {
+	          var code = langCodes[j];
+	          var referenceId = langCodes[0].split('-')[0] !== 'en' && code.split('-')[0] === 'en' ? 'inspector.wiki_en_reference' : 'inspector.wiki_reference';
+	          var info = getWikiInfo(wiki, code, referenceId);
 
-	    // internal _overwrite with eased time
-	    function _overwrite(args, t) {
-	        var previous = _stack[_index].graph;
-	        if (_index > 0) {
-	            _index--;
-	            _stack.pop();
+	          if (info) {
+	            result.wiki = info;
+	            break;
+	          }
 	        }
-	        _stack = _stack.slice(0, _index + 1);
-	        var actionResult = _act(args, t);
-	        _stack.push(actionResult);
-	        _index++;
-	        return change(previous);
-	    }
 
+	        if (result.wiki) break;
+	      }
+
+	      callback(null, result); // Helper method to get wiki info if a given language exists
 
-	    // determine difference and dispatch a change event
-	    function change(previous) {
-	        var difference = coreDifference(previous, history.graph());
-	        if (!_pausedGraph) {
-	            dispatch$1.call('change', this, difference);
+	      function getWikiInfo(wiki, langCode, tKey) {
+	        if (wiki && wiki[langCode]) {
+	          return {
+	            title: wiki[langCode],
+	            text: tKey,
+	            url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
+	          };
 	        }
-	        return difference;
-	    }
+	      }
+	    });
+	  },
+	  addLocale: function addLocale(langCode, qid) {
+	    // Makes it easier to unit test
+	    _localeIDs[langCode] = qid;
+	  },
+	  apibase: function apibase(val) {
+	    if (!arguments.length) return _apibase;
+	    _apibase = val;
+	    return this;
+	  }
+	};
+
+	var jsonpCache = {};
+	window.jsonpCache = jsonpCache;
+	function jsonpRequest(url, callback) {
+	  var request = {
+	    abort: function abort() {}
+	  };
 
+	  if (window.JSONP_FIX) {
+	    if (window.JSONP_DELAY === 0) {
+	      callback(window.JSONP_FIX);
+	    } else {
+	      var t = window.setTimeout(function () {
+	        callback(window.JSONP_FIX);
+	      }, window.JSONP_DELAY || 0);
 
-	    // iD uses namespaced keys so multiple installations do not conflict
-	    function getKey(n) {
-	        return 'iD_' + window.location.origin + '_' + n;
+	      request.abort = function () {
+	        window.clearTimeout(t);
+	      };
 	    }
 
+	    return request;
+	  }
 
-	    var history = {
+	  function rand() {
+	    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+	    var c = '';
+	    var i = -1;
 
-	        graph: function() {
-	            return _stack[_index].graph;
-	        },
+	    while (++i < 15) {
+	      c += chars.charAt(Math.floor(Math.random() * 52));
+	    }
 
+	    return c;
+	  }
 
-	        tree: function() {
-	            return _tree;
-	        },
+	  function create(url) {
+	    var e = url.match(/callback=(\w+)/);
+	    var c = e ? e[1] : rand();
 
+	    jsonpCache[c] = function (data) {
+	      if (jsonpCache[c]) {
+	        callback(data);
+	      }
 
-	        base: function() {
-	            return _stack[0].graph;
-	        },
+	      finalize();
+	    };
 
+	    function finalize() {
+	      delete jsonpCache[c];
+	      script.remove();
+	    }
 
-	        merge: function(entities/*, extent*/) {
-	            var stack = _stack.map(function(state) { return state.graph; });
-	            _stack[0].graph.rebase(entities, stack, false);
-	            _tree.rebase(entities, false);
+	    request.abort = finalize;
+	    return 'jsonpCache.' + c;
+	  }
 
-	            dispatch$1.call('merge', this, entities);
-	        },
+	  var cb = create(url);
+	  var script = select('head').append('script').attr('type', 'text/javascript').attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
+	  return request;
+	}
 
+	var bubbleApi = 'https://dev.virtualearth.net/mapcontrol/HumanScaleServices/GetBubbles.ashx?';
+	var streetsideImagesApi = 'https://t.ssl.ak.tiles.virtualearth.net/tiles/';
+	var bubbleAppKey = 'AuftgJsO0Xs8Ts4M1xZUQJQXJNsvmh3IV8DkNieCiy3tCwCUMq76-WpkrBtNAuEm';
+	var pannellumViewerCSS = 'pannellum-streetside/pannellum.css';
+	var pannellumViewerJS = 'pannellum-streetside/pannellum.js';
+	var maxResults$2 = 2000;
+	var tileZoom$2 = 16.5;
+	var tiler$6 = utilTiler().zoomExtent([tileZoom$2, tileZoom$2]).skipNullIsland(true);
+	var dispatch$7 = dispatch('loadedImages', 'viewerChanged');
+	var minHfov = 10; // zoom in degrees:  20, 10, 5
 
-	        perform: function() {
-	            // complete any transition already in progress
-	            select(document).interrupt('history.perform');
+	var maxHfov = 90; // zoom out degrees
 
-	            var transitionable = false;
-	            var action0 = arguments[0];
+	var defaultHfov = 45;
+	var _hires = false;
+	var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096
 
-	            if (arguments.length === 1 ||
-	                (arguments.length === 2 && (typeof arguments[1] !== 'function'))) {
-	                transitionable = !!action0.transitionable;
-	            }
+	var _currScene = 0;
 
-	            if (transitionable) {
-	                var origArguments = arguments;
-	                select(document)
-	                    .transition('history.perform')
-	                    .duration(duration)
-	                    .ease(linear$1)
-	                    .tween('history.tween', function() {
-	                        return function(t) {
-	                            if (t < 1) { _overwrite([action0], t); }
-	                        };
-	                    })
-	                    .on('start', function() {
-	                        _perform([action0], 0);
-	                    })
-	                    .on('end interrupt', function() {
-	                        _overwrite(origArguments, 1);
-	                    });
+	var _ssCache;
 
-	            } else {
-	                return _perform(arguments);
-	            }
-	        },
+	var _pannellumViewer;
 
+	var _sceneOptions = {
+	  showFullscreenCtrl: false,
+	  autoLoad: true,
+	  compass: true,
+	  yaw: 0,
+	  minHfov: minHfov,
+	  maxHfov: maxHfov,
+	  hfov: defaultHfov,
+	  type: 'cubemap',
+	  cubeMap: []
+	};
 
-	        replace: function() {
-	            select(document).interrupt('history.perform');
-	            return _replace(arguments, 1);
-	        },
+	var _loadViewerPromise$2;
+	/**
+	 * abortRequest().
+	 */
 
 
-	        // Same as calling pop and then perform
-	        overwrite: function() {
-	            select(document).interrupt('history.perform');
-	            return _overwrite(arguments, 1);
-	        },
+	function abortRequest$6(i) {
+	  i.abort();
+	}
+	/**
+	 * localeTimeStamp().
+	 */
 
 
-	        pop: function(n) {
-	            select(document).interrupt('history.perform');
+	function localeTimestamp(s) {
+	  if (!s) return null;
+	  var options = {
+	    day: 'numeric',
+	    month: 'short',
+	    year: 'numeric'
+	  };
+	  var d = new Date(s);
+	  if (isNaN(d.getTime())) return null;
+	  return d.toLocaleString(_mainLocalizer.localeCode(), options);
+	}
+	/**
+	 * loadTiles() wraps the process of generating tiles and then fetching image points for each tile.
+	 */
 
-	            var previous = _stack[_index].graph;
-	            if (isNaN(+n) || +n < 0) {
-	                n = 1;
-	            }
-	            while (n-- > 0 && _index > 0) {
-	                _index--;
-	                _stack.pop();
-	            }
-	            return change(previous);
-	        },
 
+	function loadTiles$2(which, url, projection, margin) {
+	  var tiles = tiler$6.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed
 
-	        // Back to the previous annotated state or _index = 0.
-	        undo: function() {
-	            select(document).interrupt('history.perform');
+	  var cache = _ssCache[which];
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k.indexOf(tile.id + ',') === 0;
+	    });
 
-	            var previousStack = _stack[_index];
-	            var previous = previousStack.graph;
-	            while (_index > 0) {
-	                _index--;
-	                if (_stack[_index].annotation) { break; }
-	            }
+	    if (!wanted) {
+	      abortRequest$6(cache.inflight[k]);
+	      delete cache.inflight[k];
+	    }
+	  });
+	  tiles.forEach(function (tile) {
+	    return loadNextTilePage$2(which, url, tile);
+	  });
+	}
+	/**
+	 * loadNextTilePage() load data for the next tile page in line.
+	 */
 
-	            dispatch$1.call('undone', this, _stack[_index], previousStack);
-	            return change(previous);
-	        },
 
+	function loadNextTilePage$2(which, url, tile) {
+	  var cache = _ssCache[which];
+	  var nextPage = cache.nextPage[tile.id] || 0;
+	  var id = tile.id + ',' + String(nextPage);
+	  if (cache.loaded[id] || cache.inflight[id]) return;
+	  cache.inflight[id] = getBubbles(url, tile, function (bubbles) {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
+	    if (!bubbles) return; // [].shift() removes the first element, some statistics info, not a bubble point
 
-	        // Forward to the next annotated state.
-	        redo: function() {
-	            select(document).interrupt('history.perform');
+	    bubbles.shift();
+	    var features = bubbles.map(function (bubble) {
+	      if (cache.points[bubble.id]) return null; // skip duplicates
 
-	            var previousStack = _stack[_index];
-	            var previous = previousStack.graph;
-	            var tryIndex = _index;
-	            while (tryIndex < _stack.length - 1) {
-	                tryIndex++;
-	                if (_stack[tryIndex].annotation) {
-	                    _index = tryIndex;
-	                    dispatch$1.call('redone', this, _stack[_index], previousStack);
-	                    break;
-	                }
-	            }
+	      var loc = [bubble.lo, bubble.la];
+	      var d = {
+	        loc: loc,
+	        key: bubble.id,
+	        ca: bubble.he,
+	        captured_at: bubble.cd,
+	        captured_by: 'microsoft',
+	        // nbn: bubble.nbn,
+	        // pbn: bubble.pbn,
+	        // ad: bubble.ad,
+	        // rn: bubble.rn,
+	        pr: bubble.pr,
+	        // previous
+	        ne: bubble.ne,
+	        // next
+	        pano: true,
+	        sequenceKey: null
+	      };
+	      cache.points[bubble.id] = d; // a sequence starts here
 
-	            return change(previous);
-	        },
+	      if (bubble.pr === undefined) {
+	        cache.leaders.push(bubble.id);
+	      }
 
+	      return {
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      };
+	    }).filter(Boolean);
+	    cache.rtree.load(features);
+	    connectSequences();
 
-	        pauseChangeDispatch: function() {
-	            if (!_pausedGraph) {
-	                _pausedGraph = _stack[_index].graph;
-	            }
-	        },
+	    if (which === 'bubbles') {
+	      dispatch$7.call('loadedImages');
+	    }
+	  });
+	} // call this sometimes to connect the bubbles into sequences
 
 
-	        resumeChangeDispatch: function() {
-	            if (_pausedGraph) {
-	                var previous = _pausedGraph;
-	                _pausedGraph = null;
-	                return change(previous);
-	            }
-	        },
+	function connectSequences() {
+	  var cache = _ssCache.bubbles;
+	  var keepLeaders = [];
 
+	  for (var i = 0; i < cache.leaders.length; i++) {
+	    var bubble = cache.points[cache.leaders[i]];
+	    var seen = {}; // try to make a sequence.. use the key of the leader bubble.
 
-	        undoAnnotation: function() {
-	            var i = _index;
-	            while (i >= 0) {
-	                if (_stack[i].annotation) { return _stack[i].annotation; }
-	                i--;
-	            }
-	        },
+	    var sequence = {
+	      key: bubble.key,
+	      bubbles: []
+	    };
+	    var complete = false;
 
+	    do {
+	      sequence.bubbles.push(bubble);
+	      seen[bubble.key] = true;
 
-	        redoAnnotation: function() {
-	            var i = _index + 1;
-	            while (i <= _stack.length - 1) {
-	                if (_stack[i].annotation) { return _stack[i].annotation; }
-	                i++;
-	            }
-	        },
+	      if (bubble.ne === undefined) {
+	        complete = true;
+	      } else {
+	        bubble = cache.points[bubble.ne]; // advance to next
+	      }
+	    } while (bubble && !seen[bubble.key] && !complete);
 
+	    if (complete) {
+	      _ssCache.sequences[sequence.key] = sequence; // assign bubbles to the sequence
 
-	        // Returns the entities from the active graph with bounding boxes
-	        // overlapping the given `extent`.
-	        intersects: function(extent) {
-	            return _tree.intersects(extent, _stack[_index].graph);
-	        },
+	      for (var j = 0; j < sequence.bubbles.length; j++) {
+	        sequence.bubbles[j].sequenceKey = sequence.key;
+	      } // create a GeoJSON LineString
 
 
-	        difference: function() {
-	            var base = _stack[0].graph;
-	            var head = _stack[_index].graph;
-	            return coreDifference(base, head);
+	      sequence.geojson = {
+	        type: 'LineString',
+	        properties: {
+	          captured_at: sequence.bubbles[0] ? sequence.bubbles[0].captured_at : null,
+	          captured_by: sequence.bubbles[0] ? sequence.bubbles[0].captured_by : null,
+	          key: sequence.key
 	        },
+	        coordinates: sequence.bubbles.map(function (d) {
+	          return d.loc;
+	        })
+	      };
+	    } else {
+	      keepLeaders.push(cache.leaders[i]);
+	    }
+	  } // couldn't complete these, save for later
 
 
-	        changes: function(action) {
-	            var base = _stack[0].graph;
-	            var head = _stack[_index].graph;
-
-	            if (action) {
-	                head = action(head);
-	            }
-
-	            var difference = coreDifference(base, head);
+	  cache.leaders = keepLeaders;
+	}
+	/**
+	 * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
+	 */
 
-	            return {
-	                modified: difference.modified(),
-	                created: difference.created(),
-	                deleted: difference.deleted()
-	            };
-	        },
 
+	function getBubbles(url, tile, callback) {
+	  var rect = tile.extent.rectangle();
+	  var urlForRequest = url + utilQsString({
+	    n: rect[3],
+	    s: rect[1],
+	    e: rect[2],
+	    w: rect[0],
+	    c: maxResults$2,
+	    appkey: bubbleAppKey,
+	    jsCallback: '{callback}'
+	  });
+	  return jsonpRequest(urlForRequest, function (data) {
+	    if (!data || data.error) {
+	      callback(null);
+	    } else {
+	      callback(data);
+	    }
+	  });
+	} // partition viewport into higher zoom tiles
 
-	        hasChanges: function() {
-	            return this.difference().length() > 0;
-	        },
 
+	function partitionViewport$2(projection) {
+	  var z = geoScaleToZoom(projection.scale());
+	  var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
 
-	        imageryUsed: function(sources) {
-	            if (sources) {
-	                _imageryUsed = sources;
-	                return history;
-	            } else {
-	                var s = new Set();
-	                _stack.slice(1, _index + 1).forEach(function(state) {
-	                    state.imageryUsed.forEach(function(source) {
-	                        if (source !== 'Custom') {
-	                            s.add(source);
-	                        }
-	                    });
-	                });
-	                return Array.from(s);
-	            }
-	        },
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // no more than `limit` results per partition.
 
 
-	        photoOverlaysUsed: function(sources) {
-	            if (sources) {
-	                _photoOverlaysUsed = sources;
-	                return history;
-	            } else {
-	                var s = new Set();
-	                _stack.slice(1, _index + 1).forEach(function(state) {
-	                    if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
-	                        state.photoOverlaysUsed.forEach(function(photoOverlay) {
-	                            s.add(photoOverlay);
-	                        });
-	                    }
-	                });
-	                return Array.from(s);
-	            }
-	        },
+	function searchLimited$2(limit, projection, rtree) {
+	  limit = limit || 5;
+	  return partitionViewport$2(projection).reduce(function (result, extent) {
+	    var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+	      return d.data;
+	    });
+	    return found.length ? result.concat(found) : result;
+	  }, []);
+	}
+	/**
+	 * loadImage()
+	 */
 
 
-	        // save the current history state
-	        checkpoint: function(key) {
-	            _checkpoints[key] = {
-	                stack: _stack,
-	                index: _index
-	            };
-	            return history;
-	        },
+	function loadImage(imgInfo) {
+	  return new Promise(function (resolve) {
+	    var img = new Image();
 
+	    img.onload = function () {
+	      var canvas = document.getElementById('ideditor-canvas' + imgInfo.face);
+	      var ctx = canvas.getContext('2d');
+	      ctx.drawImage(img, imgInfo.x, imgInfo.y);
+	      resolve({
+	        imgInfo: imgInfo,
+	        status: 'ok'
+	      });
+	    };
 
-	        // restore history state to a given checkpoint or reset completely
-	        reset: function(key) {
-	            if (key !== undefined && _checkpoints.hasOwnProperty(key)) {
-	                _stack = _checkpoints[key].stack;
-	                _index = _checkpoints[key].index;
-	            } else {
-	                _stack = [{graph: coreGraph()}];
-	                _index = 0;
-	                _tree = coreTree(_stack[0].graph);
-	                _checkpoints = {};
-	            }
-	            dispatch$1.call('change');
-	            return history;
-	        },
+	    img.onerror = function () {
+	      resolve({
+	        data: imgInfo,
+	        status: 'error'
+	      });
+	    };
 
+	    img.setAttribute('crossorigin', '');
+	    img.src = imgInfo.url;
+	  });
+	}
+	/**
+	 * loadCanvas()
+	 */
 
-	        // `toIntroGraph()` is used to export the intro graph used by the walkthrough.
-	        //
-	        // To use it:
-	        //  1. Start the walkthrough.
-	        //  2. Get to a "free editing" tutorial step
-	        //  3. Make your edits to the walkthrough map
-	        //  4. In your browser dev console run:
-	        //        `id.history().toIntroGraph()`
-	        //  5. This outputs stringified JSON to the browser console
-	        //  6. Copy it to `data/intro_graph.json` and prettify it in your code editor
-	        toIntroGraph: function() {
-	            var nextID = { n: 0, r: 0, w: 0 };
-	            var permIDs = {};
-	            var graph = this.graph();
-	            var baseEntities = {};
-
-	            // clone base entities..
-	            Object.values(graph.base().entities).forEach(function(entity) {
-	                var copy = copyIntroEntity(entity);
-	                baseEntities[copy.id] = copy;
-	            });
 
-	            // replace base entities with head entities..
-	            Object.keys(graph.entities).forEach(function(id) {
-	                var entity = graph.entities[id];
-	                if (entity) {
-	                    var copy = copyIntroEntity(entity);
-	                    baseEntities[copy.id] = copy;
-	                } else {
-	                    delete baseEntities[id];
-	                }
-	            });
+	function loadCanvas(imageGroup) {
+	  return Promise.all(imageGroup.map(loadImage)).then(function (data) {
+	    var canvas = document.getElementById('ideditor-canvas' + data[0].imgInfo.face);
+	    var which = {
+	      '01': 0,
+	      '02': 1,
+	      '03': 2,
+	      '10': 3,
+	      '11': 4,
+	      '12': 5
+	    };
+	    var face = data[0].imgInfo.face;
+	    _sceneOptions.cubeMap[which[face]] = canvas.toDataURL('image/jpeg', 1.0);
+	    return {
+	      status: 'loadCanvas for face ' + data[0].imgInfo.face + 'ok'
+	    };
+	  });
+	}
+	/**
+	 * loadFaces()
+	 */
 
-	            // swap temporary for permanent ids..
-	            Object.values(baseEntities).forEach(function(entity) {
-	                if (Array.isArray(entity.nodes)) {
-	                    entity.nodes = entity.nodes.map(function(node) {
-	                        return permIDs[node] || node;
-	                    });
-	                }
-	                if (Array.isArray(entity.members)) {
-	                    entity.members = entity.members.map(function(member) {
-	                        member.id = permIDs[member.id] || member.id;
-	                        return member;
-	                    });
-	                }
-	            });
 
-	            return JSON.stringify({ dataIntroGraph: baseEntities });
+	function loadFaces(faceGroup) {
+	  return Promise.all(faceGroup.map(loadCanvas)).then(function () {
+	    return {
+	      status: 'loadFaces done'
+	    };
+	  });
+	}
 
+	function setupCanvas(selection, reset) {
+	  if (reset) {
+	    selection.selectAll('#ideditor-stitcher-canvases').remove();
+	  } // Add the Streetside working canvases. These are used for 'stitching', or combining,
+	  // multiple images for each of the six faces, before passing to the Pannellum control as DataUrls
 
-	            function copyIntroEntity(source) {
-	                var copy = utilObjectOmit(source, ['type', 'user', 'v', 'version', 'visible']);
 
-	                // Note: the copy is no longer an osmEntity, so it might not have `tags`
-	                if (copy.tags && !Object.keys(copy.tags)) {
-	                    delete copy.tags;
-	                }
+	  selection.selectAll('#ideditor-stitcher-canvases').data([0]).enter().append('div').attr('id', 'ideditor-stitcher-canvases').attr('display', 'none').selectAll('canvas').data(['canvas01', 'canvas02', 'canvas03', 'canvas10', 'canvas11', 'canvas12']).enter().append('canvas').attr('id', function (d) {
+	    return 'ideditor-' + d;
+	  }).attr('width', _resolution).attr('height', _resolution);
+	}
 
-	                if (Array.isArray(copy.loc)) {
-	                    copy.loc[0] = +copy.loc[0].toFixed(6);
-	                    copy.loc[1] = +copy.loc[1].toFixed(6);
-	                }
+	function qkToXY(qk) {
+	  var x = 0;
+	  var y = 0;
+	  var scale = 256;
 
-	                var match = source.id.match(/([nrw])-\d*/);  // temporary id
-	                if (match !== null) {
-	                    var nrw = match[1];
-	                    var permID;
-	                    do { permID = nrw + (++nextID[nrw]); }
-	                    while (baseEntities.hasOwnProperty(permID));
+	  for (var i = qk.length; i > 0; i--) {
+	    var key = qk[i - 1];
+	    x += +(key === '1' || key === '3') * scale;
+	    y += +(key === '2' || key === '3') * scale;
+	    scale *= 2;
+	  }
 
-	                    copy.id = permIDs[source.id] = permID;
-	                }
-	                return copy;
-	            }
-	        },
+	  return [x, y];
+	}
 
+	function getQuadKeys() {
+	  var dim = _resolution / 256;
+	  var quadKeys;
 
-	        toJSON: function() {
-	            if (!this.hasChanges()) { return; }
+	  if (dim === 16) {
+	    quadKeys = ['0000', '0001', '0010', '0011', '0100', '0101', '0110', '0111', '1000', '1001', '1010', '1011', '1100', '1101', '1110', '1111', '0002', '0003', '0012', '0013', '0102', '0103', '0112', '0113', '1002', '1003', '1012', '1013', '1102', '1103', '1112', '1113', '0020', '0021', '0030', '0031', '0120', '0121', '0130', '0131', '1020', '1021', '1030', '1031', '1120', '1121', '1130', '1131', '0022', '0023', '0032', '0033', '0122', '0123', '0132', '0133', '1022', '1023', '1032', '1033', '1122', '1123', '1132', '1133', '0200', '0201', '0210', '0211', '0300', '0301', '0310', '0311', '1200', '1201', '1210', '1211', '1300', '1301', '1310', '1311', '0202', '0203', '0212', '0213', '0302', '0303', '0312', '0313', '1202', '1203', '1212', '1213', '1302', '1303', '1312', '1313', '0220', '0221', '0230', '0231', '0320', '0321', '0330', '0331', '1220', '1221', '1230', '1231', '1320', '1321', '1330', '1331', '0222', '0223', '0232', '0233', '0322', '0323', '0332', '0333', '1222', '1223', '1232', '1233', '1322', '1323', '1332', '1333', '2000', '2001', '2010', '2011', '2100', '2101', '2110', '2111', '3000', '3001', '3010', '3011', '3100', '3101', '3110', '3111', '2002', '2003', '2012', '2013', '2102', '2103', '2112', '2113', '3002', '3003', '3012', '3013', '3102', '3103', '3112', '3113', '2020', '2021', '2030', '2031', '2120', '2121', '2130', '2131', '3020', '3021', '3030', '3031', '3120', '3121', '3130', '3131', '2022', '2023', '2032', '2033', '2122', '2123', '2132', '2133', '3022', '3023', '3032', '3033', '3122', '3123', '3132', '3133', '2200', '2201', '2210', '2211', '2300', '2301', '2310', '2311', '3200', '3201', '3210', '3211', '3300', '3301', '3310', '3311', '2202', '2203', '2212', '2213', '2302', '2303', '2312', '2313', '3202', '3203', '3212', '3213', '3302', '3303', '3312', '3313', '2220', '2221', '2230', '2231', '2320', '2321', '2330', '2331', '3220', '3221', '3230', '3231', '3320', '3321', '3330', '3331', '2222', '2223', '2232', '2233', '2322', '2323', '2332', '2333', '3222', '3223', '3232', '3233', '3322', '3323', '3332', '3333'];
+	  } else if (dim === 8) {
+	    quadKeys = ['000', '001', '010', '011', '100', '101', '110', '111', '002', '003', '012', '013', '102', '103', '112', '113', '020', '021', '030', '031', '120', '121', '130', '131', '022', '023', '032', '033', '122', '123', '132', '133', '200', '201', '210', '211', '300', '301', '310', '311', '202', '203', '212', '213', '302', '303', '312', '313', '220', '221', '230', '231', '320', '321', '330', '331', '222', '223', '232', '233', '322', '323', '332', '333'];
+	  } else if (dim === 4) {
+	    quadKeys = ['00', '01', '10', '11', '02', '03', '12', '13', '20', '21', '30', '31', '22', '23', '32', '33'];
+	  } else {
+	    // dim === 2
+	    quadKeys = ['0', '1', '2', '3'];
+	  }
 
-	            var allEntities = {};
-	            var baseEntities = {};
-	            var base = _stack[0];
+	  return quadKeys;
+	}
 
-	            var s = _stack.map(function(i) {
-	                var modified = [];
-	                var deleted = [];
+	var serviceStreetside = {
+	  /**
+	   * init() initialize streetside.
+	   */
+	  init: function init() {
+	    if (!_ssCache) {
+	      this.reset();
+	    }
 
-	                Object.keys(i.graph.entities).forEach(function(id) {
-	                    var entity = i.graph.entities[id];
-	                    if (entity) {
-	                        var key = osmEntity.key(entity);
-	                        allEntities[key] = entity;
-	                        modified.push(key);
-	                    } else {
-	                        deleted.push(id);
-	                    }
+	    this.event = utilRebind(this, dispatch$7, 'on');
+	  },
 
-	                    // make sure that the originals of changed or deleted entities get merged
-	                    // into the base of the _stack after restoring the data from JSON.
-	                    if (id in base.graph.entities) {
-	                        baseEntities[id] = base.graph.entities[id];
-	                    }
-	                    if (entity && entity.nodes) {
-	                        // get originals of pre-existing child nodes
-	                        entity.nodes.forEach(function(nodeID) {
-	                            if (nodeID in base.graph.entities) {
-	                                baseEntities[nodeID] = base.graph.entities[nodeID];
-	                            }
-	                        });
-	                    }
-	                    // get originals of parent entities too
-	                    var baseParents = base.graph._parentWays[id];
-	                    if (baseParents) {
-	                        baseParents.forEach(function(parentID) {
-	                            if (parentID in base.graph.entities) {
-	                                baseEntities[parentID] = base.graph.entities[parentID];
-	                            }
-	                        });
-	                    }
-	                });
+	  /**
+	   * reset() reset the cache.
+	   */
+	  reset: function reset() {
+	    if (_ssCache) {
+	      Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$6);
+	    }
 
-	                var x = {};
+	    _ssCache = {
+	      bubbles: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        rtree: new RBush(),
+	        points: {},
+	        leaders: []
+	      },
+	      sequences: {}
+	    };
+	  },
 
-	                if (modified.length) { x.modified = modified; }
-	                if (deleted.length) { x.deleted = deleted; }
-	                if (i.imageryUsed) { x.imageryUsed = i.imageryUsed; }
-	                if (i.photoOverlaysUsed) { x.photoOverlaysUsed = i.photoOverlaysUsed; }
-	                if (i.annotation) { x.annotation = i.annotation; }
-	                if (i.transform) { x.transform = i.transform; }
-	                if (i.selectedIDs) { x.selectedIDs = i.selectedIDs; }
+	  /**
+	   * bubbles()
+	   */
+	  bubbles: function bubbles(projection) {
+	    var limit = 5;
+	    return searchLimited$2(limit, projection, _ssCache.bubbles.rtree);
+	  },
+	  cachedImage: function cachedImage(imageKey) {
+	    return _ssCache.bubbles.points[imageKey];
+	  },
+	  sequences: function sequences(projection) {
+	    var viewport = projection.clipExtent();
+	    var min = [viewport[0][0], viewport[1][1]];
+	    var max = [viewport[1][0], viewport[0][1]];
+	    var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+	    var seen = {};
+	    var results = []; // all sequences for bubbles in viewport
 
-	                return x;
-	            });
+	    _ssCache.bubbles.rtree.search(bbox).forEach(function (d) {
+	      var key = d.data.sequenceKey;
 
-	            return JSON.stringify({
-	                version: 3,
-	                entities: Object.values(allEntities),
-	                baseEntities: Object.values(baseEntities),
-	                stack: s,
-	                nextIDs: osmEntity.id.next,
-	                index: _index,
-	                // note the time the changes were saved
-	                timestamp: (new Date()).getTime()
-	            });
-	        },
+	      if (key && !seen[key]) {
+	        seen[key] = true;
+	        results.push(_ssCache.sequences[key].geojson);
+	      }
+	    });
 
+	    return results;
+	  },
 
-	        fromJSON: function(json, loadChildNodes) {
-	            var h = JSON.parse(json);
-	            var loadComplete = true;
+	  /**
+	   * loadBubbles()
+	   */
+	  loadBubbles: function loadBubbles(projection, margin) {
+	    // by default: request 2 nearby tiles so we can connect sequences.
+	    if (margin === undefined) margin = 2;
+	    loadTiles$2('bubbles', bubbleApi, projection, margin);
+	  },
+	  viewer: function viewer() {
+	    return _pannellumViewer;
+	  },
+	  initViewer: function initViewer() {
+	    if (!window.pannellum) return;
+	    if (_pannellumViewer) return;
+	    _currScene += 1;
 
-	            osmEntity.id.next = h.nextIDs;
-	            _index = h.index;
+	    var sceneID = _currScene.toString();
 
-	            if (h.version === 2 || h.version === 3) {
-	                var allEntities = {};
+	    var options = {
+	      'default': {
+	        firstScene: sceneID
+	      },
+	      scenes: {}
+	    };
+	    options.scenes[sceneID] = _sceneOptions;
+	    _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
+	  },
+	  ensureViewerLoaded: function ensureViewerLoaded(context) {
+	    if (_loadViewerPromise$2) return _loadViewerPromise$2; // create ms-wrapper, a photo wrapper class
 
-	                h.entities.forEach(function(entity) {
-	                    allEntities[osmEntity.key(entity)] = osmEntity(entity);
-	                });
+	    var wrap = context.container().select('.photoviewer').selectAll('.ms-wrapper').data([0]); // inject ms-wrapper into the photoviewer div
+	    // (used by all to house each custom photo viewer)
 
-	                if (h.version === 3) {
-	                    // This merges originals for changed entities into the base of
-	                    // the _stack even if the current _stack doesn't have them (for
-	                    // example when iD has been restarted in a different region)
-	                    var baseEntities = h.baseEntities.map(function(d) { return osmEntity(d); });
-	                    var stack = _stack.map(function(state) { return state.graph; });
-	                    _stack[0].graph.rebase(baseEntities, stack, true);
-	                    _tree.rebase(baseEntities, true);
-
-	                    // When we restore a modified way, we also need to fetch any missing
-	                    // childnodes that would normally have been downloaded with it.. #2142
-	                    if (loadChildNodes) {
-	                        var osm = context.connection();
-	                        var baseWays = baseEntities
-	                            .filter(function(e) { return e.type === 'way'; });
-	                        var nodeIDs = baseWays
-	                            .reduce(function(acc, way) { return utilArrayUnion(acc, way.nodes); }, []);
-	                        var missing = nodeIDs
-	                            .filter(function(n) { return !_stack[0].graph.hasEntity(n); });
-
-	                        if (missing.length && osm) {
-	                            loadComplete = false;
-	                            context.map().redrawEnable(false);
-
-	                            var loading = uiLoading(context).blocking(true);
-	                            context.container().call(loading);
-
-	                            var childNodesLoaded = function(err, result) {
-	                                if (!err) {
-	                                    var visibleGroups = utilArrayGroupBy(result.data, 'visible');
-	                                    var visibles = visibleGroups.true || [];      // alive nodes
-	                                    var invisibles = visibleGroups.false || [];   // deleted nodes
-
-	                                    if (visibles.length) {
-	                                        var visibleIDs = visibles.map(function(entity) { return entity.id; });
-	                                        var stack = _stack.map(function(state) { return state.graph; });
-	                                        missing = utilArrayDifference(missing, visibleIDs);
-	                                        _stack[0].graph.rebase(visibles, stack, true);
-	                                        _tree.rebase(visibles, true);
-	                                    }
-
-	                                    // fetch older versions of nodes that were deleted..
-	                                    invisibles.forEach(function(entity) {
-	                                        osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
-	                                    });
-	                                }
-
-	                                if (err || !missing.length) {
-	                                    loading.close();
-	                                    context.map().redrawEnable(true);
-	                                    dispatch$1.call('change');
-	                                    dispatch$1.call('restore', this);
-	                                }
-	                            };
-
-	                            osm.loadMultiple(missing, childNodesLoaded);
-	                        }
-	                    }
-	                }
+	    var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper ms-wrapper').classed('hide', true);
+	    var that = this;
+	    var pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // inject div to support streetside viewer (pannellum) and attribution line
 
-	                _stack = h.stack.map(function(d) {
-	                    var entities = {}, entity;
+	    wrapEnter.append('div').attr('id', 'ideditor-viewer-streetside').on(pointerPrefix + 'down.streetside', function () {
+	      select(window).on(pointerPrefix + 'move.streetside', function () {
+	        dispatch$7.call('viewerChanged');
+	      }, true);
+	    }).on(pointerPrefix + 'up.streetside pointercancel.streetside', function () {
+	      select(window).on(pointerPrefix + 'move.streetside', null); // continue dispatching events for a few seconds, in case viewer has inertia.
 
-	                    if (d.modified) {
-	                        d.modified.forEach(function(key) {
-	                            entity = allEntities[key];
-	                            entities[entity.id] = entity;
-	                        });
-	                    }
+	      var t = timer(function (elapsed) {
+	        dispatch$7.call('viewerChanged');
 
-	                    if (d.deleted) {
-	                        d.deleted.forEach(function(id) {
-	                            entities[id] = undefined;
-	                        });
-	                    }
+	        if (elapsed > 2000) {
+	          t.stop();
+	        }
+	      });
+	    }).append('div').attr('class', 'photo-attribution fillD');
+	    var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
+	    controlsEnter.append('button').on('click.back', step(-1)).html('◄');
+	    controlsEnter.append('button').on('click.forward', step(1)).html('►'); // create working canvas for stitching together images
 
-	                    return {
-	                        graph: coreGraph(_stack[0].graph).load(entities),
-	                        annotation: d.annotation,
-	                        imageryUsed: d.imageryUsed,
-	                        photoOverlaysUsed: d.photoOverlaysUsed,
-	                        transform: d.transform,
-	                        selectedIDs: d.selectedIDs
-	                    };
-	                });
+	    wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler
 
-	            } else { // original version
-	                _stack = h.stack.map(function(d) {
-	                    var entities = {};
+	    context.ui().photoviewer.on('resize.streetside', function () {
+	      if (_pannellumViewer) {
+	        _pannellumViewer.resize();
+	      }
+	    });
+	    _loadViewerPromise$2 = new Promise(function (resolve, reject) {
+	      var loadedCount = 0;
 
-	                    for (var i in d.entities) {
-	                        var entity = d.entities[i];
-	                        entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
-	                    }
+	      function loaded() {
+	        loadedCount += 1; // wait until both files are loaded
 
-	                    d.graph = coreGraph(_stack[0].graph).load(entities);
-	                    return d;
-	                });
-	            }
+	        if (loadedCount === 2) resolve();
+	      }
 
-	            var transform = _stack[_index].transform;
-	            if (transform) {
-	                context.map().transformEase(transform, 0);   // 0 = immediate, no easing
-	            }
+	      var head = select('head'); // load streetside pannellum viewer css
 
-	            if (loadComplete) {
-	                dispatch$1.call('change');
-	                dispatch$1.call('restore', this);
-	            }
+	      head.selectAll('#ideditor-streetside-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-streetside-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(pannellumViewerCSS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
+	        reject();
+	      }); // load streetside pannellum viewer js
 
-	            return history;
-	        },
+	      head.selectAll('#ideditor-streetside-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-streetside-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(pannellumViewerJS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
+	        reject();
+	      });
+	    })["catch"](function () {
+	      _loadViewerPromise$2 = null;
+	    });
+	    return _loadViewerPromise$2;
 
+	    function step(stepBy) {
+	      return function () {
+	        var viewer = context.container().select('.photoviewer');
+	        var selected = viewer.empty() ? undefined : viewer.datum();
+	        if (!selected) return;
+	        var nextID = stepBy === 1 ? selected.ne : selected.pr;
 
-	        lock: function() {
-	            return lock.lock();
-	        },
+	        var yaw = _pannellumViewer.getYaw();
 
+	        var ca = selected.ca + yaw;
+	        var origin = selected.loc; // construct a search trapezoid pointing out from current bubble
 
-	        unlock: function() {
-	            lock.unlock();
-	        },
+	        var meters = 35;
+	        var p1 = [origin[0] + geoMetersToLon(meters / 5, origin[1]), origin[1]];
+	        var p2 = [origin[0] + geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
+	        var p3 = [origin[0] - geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
+	        var p4 = [origin[0] - geoMetersToLon(meters / 5, origin[1]), origin[1]];
+	        var poly = [p1, p2, p3, p4, p1]; // rotate it to face forward/backward
 
+	        var angle = (stepBy === 1 ? ca : ca + 180) * (Math.PI / 180);
+	        poly = geoRotate(poly, -angle, origin);
+	        var extent = poly.reduce(function (extent, point) {
+	          return extent.extend(geoExtent(point));
+	        }, geoExtent()); // find nearest other bubble in the search polygon
 
-	        save: function() {
-	            if (lock.locked() &&
-	                // don't overwrite existing, unresolved changes
-	                !_hasUnresolvedRestorableChanges) {
+	        var minDist = Infinity;
 
-	                corePreferences(getKey('saved_history'), history.toJSON() || null);
-	            }
-	            return history;
-	        },
+	        _ssCache.bubbles.rtree.search(extent.bbox()).forEach(function (d) {
+	          if (d.data.key === selected.key) return;
+	          if (!geoPointInPolygon(d.data.loc, poly)) return;
+	          var dist = geoVecLength(d.data.loc, selected.loc);
+	          var theta = selected.ca - d.data.ca;
+	          var minTheta = Math.min(Math.abs(theta), 360 - Math.abs(theta));
 
+	          if (minTheta > 20) {
+	            dist += 5; // penalize distance if camera angles don't match
+	          }
 
-	        // delete the history version saved in localStorage
-	        clearSaved: function() {
-	            context.debouncedSave.cancel();
-	            if (lock.locked()) {
-	                _hasUnresolvedRestorableChanges = false;
-	                corePreferences(getKey('saved_history'), null);
+	          if (dist < minDist) {
+	            nextID = d.data.key;
+	            minDist = dist;
+	          }
+	        });
 
-	                // clear the changeset metadata associated with the saved history
-	                corePreferences('comment', null);
-	                corePreferences('hashtags', null);
-	                corePreferences('source', null);
-	            }
-	            return history;
-	        },
+	        var nextBubble = nextID && that.cachedImage(nextID);
+	        if (!nextBubble) return;
+	        context.map().centerEase(nextBubble.loc);
+	        that.selectImage(context, nextBubble.key).yaw(yaw).showViewer(context);
+	      };
+	    }
+	  },
+	  yaw: function yaw(_yaw) {
+	    if (typeof _yaw !== 'number') return _yaw;
+	    _sceneOptions.yaw = _yaw;
+	    return this;
+	  },
 
+	  /**
+	   * showViewer()
+	   */
+	  showViewer: function showViewer(context) {
+	    var wrap = context.container().select('.photoviewer').classed('hide', false);
+	    var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
 
-	        savedHistoryJSON: function() {
-	            return corePreferences(getKey('saved_history'));
-	        },
+	    if (isHidden) {
+	      wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
+	      wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
+	    }
 
+	    return this;
+	  },
 
-	        hasRestorableChanges: function() {
-	            return _hasUnresolvedRestorableChanges;
-	        },
+	  /**
+	   * hideViewer()
+	   */
+	  hideViewer: function hideViewer(context) {
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(null);
+	    viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+	    context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
+	    this.updateUrlImage(null);
+	    return this.setStyles(context, null, true);
+	  },
 
+	  /**
+	   * selectImage().
+	   */
+	  selectImage: function selectImage(context, key) {
+	    var that = this;
+	    var d = this.cachedImage(key);
+	    var viewer = context.container().select('.photoviewer');
+	    if (!viewer.empty()) viewer.datum(d);
+	    this.setStyles(context, null, true);
+	    var wrap = context.container().select('.photoviewer .ms-wrapper');
+	    var attribution = wrap.selectAll('.photo-attribution').html('');
+	    wrap.selectAll('.pnlm-load-box') // display "loading.."
+	    .style('display', 'block');
+	    if (!d) return this;
+	    this.updateUrlImage(key);
+	    _sceneOptions.northOffset = d.ca;
+	    var line1 = attribution.append('div').attr('class', 'attribution-row');
+	    var hiresDomId = utilUniqueDomId('streetside-hires'); // Add hires checkbox
+
+	    var label = line1.append('label').attr('for', hiresDomId).attr('class', 'streetside-hires');
+	    label.append('input').attr('type', 'checkbox').attr('id', hiresDomId).property('checked', _hires).on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      _hires = !_hires;
+	      _resolution = _hires ? 1024 : 512;
+	      wrap.call(setupCanvas, true);
+	      var viewstate = {
+	        yaw: _pannellumViewer.getYaw(),
+	        pitch: _pannellumViewer.getPitch(),
+	        hfov: _pannellumViewer.getHfov()
+	      };
+	      _sceneOptions = Object.assign(_sceneOptions, viewstate);
+	      that.selectImage(context, d.key).showViewer(context);
+	    });
+	    label.append('span').html(_t.html('streetside.hires'));
+	    var captureInfo = line1.append('div').attr('class', 'attribution-capture-info'); // Add capture date
 
-	        // load history from a version stored in localStorage
-	        restore: function() {
-	            if (lock.locked()) {
-	                _hasUnresolvedRestorableChanges = false;
-	                var json = this.savedHistoryJSON();
-	                if (json) { history.fromJSON(json, true); }
-	            }
-	        },
+	    if (d.captured_by) {
+	      var yyyy = new Date().getFullYear();
+	      captureInfo.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://www.microsoft.com/en-us/maps/streetside').html('©' + yyyy + ' Microsoft');
+	      captureInfo.append('span').html('|');
+	    }
 
+	    if (d.captured_at) {
+	      captureInfo.append('span').attr('class', 'captured_at').html(localeTimestamp(d.captured_at));
+	    } // Add image links
 
-	        _getKey: getKey
 
-	    };
+	    var line2 = attribution.append('div').attr('class', 'attribution-row');
+	    line2.append('a').attr('class', 'image-view-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps?cp=' + d.loc[1] + '~' + d.loc[0] + '&lvl=17&dir=' + d.ca + '&style=x&v=2&sV=1').html(_t.html('streetside.view_on_bing'));
+	    line2.append('a').attr('class', 'image-report-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps/privacyreport/streetsideprivacyreport?bubbleid=' + encodeURIComponent(d.key) + '&focus=photo&lat=' + d.loc[1] + '&lng=' + d.loc[0] + '&z=17').html(_t.html('streetside.report'));
+	    var bubbleIdQuadKey = d.key.toString(4);
+	    var paddingNeeded = 16 - bubbleIdQuadKey.length;
 
+	    for (var i = 0; i < paddingNeeded; i++) {
+	      bubbleIdQuadKey = '0' + bubbleIdQuadKey;
+	    }
 
-	    history.reset();
+	    var imgUrlPrefix = streetsideImagesApi + 'hs' + bubbleIdQuadKey;
+	    var imgUrlSuffix = '.jpg?g=6338&n=z'; // Cubemap face code order matters here: front=01, right=02, back=03, left=10, up=11, down=12
 
-	    return utilRebind(history, dispatch$1, 'on');
-	}
+	    var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces
 
-	/**
-	 * Look for roads that can be connected to other roads with a short extension
-	 */
-	function validationAlmostJunction(context) {
-	  var type = 'almost_junction';
-	  var EXTEND_TH_METERS = 5;
-	  var WELD_TH_METERS = 0.75;
-	  // Comes from considering bounding case of parallel ways
-	  var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS;
-	  // Comes from considering bounding case of perpendicular ways
-	  var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
+	    var quadKeys = getQuadKeys();
+	    var faces = faceKeys.map(function (faceKey) {
+	      return quadKeys.map(function (quadKey) {
+	        var xy = qkToXY(quadKey);
+	        return {
+	          face: faceKey,
+	          url: imgUrlPrefix + faceKey + quadKey + imgUrlSuffix,
+	          x: xy[0],
+	          y: xy[1]
+	        };
+	      });
+	    });
+	    loadFaces(faces).then(function () {
+	      if (!_pannellumViewer) {
+	        that.initViewer();
+	      } else {
+	        // make a new scene
+	        _currScene += 1;
 
-	  function isHighway(entity) {
-	    return entity.type === 'way'
-	      && osmRoutableHighwayTagValues[entity.tags.highway];
-	  }
+	        var sceneID = _currScene.toString();
 
-	  function isTaggedAsNotContinuing(node) {
-	    return node.tags.noexit === 'yes'
-	      || node.tags.amenity === 'parking_entrance'
-	      || (node.tags.entrance && node.tags.entrance !== 'no');
-	  }
+	        _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene
 
 
-	  var validation = function checkAlmostJunction(entity, graph) {
-	    if (!isHighway(entity)) { return []; }
-	    if (entity.isDegenerate()) { return []; }
+	        if (_currScene > 2) {
+	          sceneID = (_currScene - 1).toString();
 
-	    var tree = context.history().tree();
-	    var extendableNodeInfos = findConnectableEndNodesByExtension(entity);
+	          _pannellumViewer.removeScene(sceneID);
+	        }
+	      }
+	    });
+	    return this;
+	  },
+	  getSequenceKeyForBubble: function getSequenceKeyForBubble(d) {
+	    return d && d.sequenceKey;
+	  },
+	  // Updates the currently highlighted sequence and selected bubble.
+	  // Reset is only necessary when interacting with the viewport because
+	  // this implicitly changes the currently selected bubble/sequence
+	  setStyles: function setStyles(context, hovered, reset) {
+	    if (reset) {
+	      // reset all layers
+	      context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
+	      context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
+	    }
 
-	    var issues = [];
+	    var hoveredBubbleKey = hovered && hovered.key;
+	    var hoveredSequenceKey = this.getSequenceKeyForBubble(hovered);
+	    var hoveredSequence = hoveredSequenceKey && _ssCache.sequences[hoveredSequenceKey];
+	    var hoveredBubbleKeys = hoveredSequence && hoveredSequence.bubbles.map(function (d) {
+	      return d.key;
+	    }) || [];
+	    var viewer = context.container().select('.photoviewer');
+	    var selected = viewer.empty() ? undefined : viewer.datum();
+	    var selectedBubbleKey = selected && selected.key;
+	    var selectedSequenceKey = this.getSequenceKeyForBubble(selected);
+	    var selectedSequence = selectedSequenceKey && _ssCache.sequences[selectedSequenceKey];
+	    var selectedBubbleKeys = selectedSequence && selectedSequence.bubbles.map(function (d) {
+	      return d.key;
+	    }) || []; // highlight sibling viewfields on either the selected or the hovered sequences
 
-	    extendableNodeInfos.forEach(function (extendableNodeInfo) {
-	      issues.push(new validationIssue({
-	        type: type,
-	        subtype: 'highway-highway',
-	        severity: 'warning',
-	        message: function message(context) {
-	          var entity1 = context.hasEntity(this.entityIds[0]);
-	          if (this.entityIds[0] === this.entityIds[2]) {
-	            return entity1 ? _t('issues.almost_junction.self.message', {
-	              feature: utilDisplayLabel(entity1, context.graph())
-	            }) : '';
-	          } else {
-	            var entity2 = context.hasEntity(this.entityIds[2]);
-	            return (entity1 && entity2) ? _t('issues.almost_junction.message', {
-	              feature: utilDisplayLabel(entity1, context.graph()),
-	              feature2: utilDisplayLabel(entity2, context.graph())
-	            }) : '';
-	          }
-	        },
-	        reference: showReference,
-	        entityIds: [
-	          entity.id,
-	          extendableNodeInfo.node.id,
-	          extendableNodeInfo.wid ],
-	        loc: extendableNodeInfo.node.loc,
-	        hash: JSON.stringify(extendableNodeInfo.node.loc),
-	        data: {
-	          midId: extendableNodeInfo.mid.id,
-	          edge: extendableNodeInfo.edge,
-	          cross_loc: extendableNodeInfo.cross_loc
-	        },
-	        dynamicFixes: makeFixes
-	      }));
+	    var highlightedBubbleKeys = utilArrayUnion(hoveredBubbleKeys, selectedBubbleKeys);
+	    context.container().selectAll('.layer-streetside-images .viewfield-group').classed('highlighted', function (d) {
+	      return highlightedBubbleKeys.indexOf(d.key) !== -1;
+	    }).classed('hovered', function (d) {
+	      return d.key === hoveredBubbleKey;
+	    }).classed('currentView', function (d) {
+	      return d.key === selectedBubbleKey;
 	    });
+	    context.container().selectAll('.layer-streetside-images .sequence').classed('highlighted', function (d) {
+	      return d.properties.key === hoveredSequenceKey;
+	    }).classed('currentView', function (d) {
+	      return d.properties.key === selectedSequenceKey;
+	    }); // update viewfields if needed
 
-	    return issues;
-
-	    function makeFixes(context) {
-	      var fixes = [new validationIssueFix({
-	        icon: 'iD-icon-abutment',
-	        title: _t('issues.fix.connect_features.title'),
-	        onClick: function onClick(context) {
-	          var annotation = _t('issues.fix.connect_almost_junction.annotation');
-	          var ref = this.issue.entityIds;
-	          var endNodeId = ref[1];
-	          var crossWayId = ref[2];
-	          var midNode = context.entity(this.issue.data.midId);
-	          var endNode = context.entity(endNodeId);
-	          var crossWay = context.entity(crossWayId);
+	    context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
 
-	          // When endpoints are close, just join if resulting small change in angle (#7201)
-	          var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
-	          if (nearEndNodes.length > 0) {
-	            var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
-	            if (collinear) {
-	              context.perform(
-	                actionMergeNodes([collinear.id, endNode.id], collinear.loc),
-	                annotation
-	              );
-	              return;
-	            }
-	          }
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	          var targetEdge = this.issue.data.edge;
-	          var crossLoc = this.issue.data.cross_loc;
-	          var edgeNodes = [context.entity(targetEdge[0]), context.entity(targetEdge[1])];
-	          var closestNodeInfo = geoSphericalClosestNode(edgeNodes, crossLoc);
+	      if (d.pano && d.key !== selectedBubbleKey) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
+	    }
 
-	          // already a point nearby, just connect to that
-	          if (closestNodeInfo.distance < WELD_TH_METERS) {
-	            context.perform(
-	              actionMergeNodes([closestNodeInfo.node.id, endNode.id], closestNodeInfo.node.loc),
-	              annotation
-	            );
-	          // else add the end node to the edge way
-	          } else {
-	            context.perform(
-	              actionAddMidpoint({loc: crossLoc, edge: targetEdge}, endNode),
-	              annotation
-	            );
-	          }
-	        }
-	      })];
+	    return this;
+	  },
+	  updateUrlImage: function updateUrlImage(imageKey) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	      var node = context.hasEntity(this.entityIds[1]);
-	      if (node && !node.hasInterestingTags()) {
-	        // node has no descriptive tags, suggest noexit fix
-	        fixes.push(new validationIssueFix({
-	          icon: 'maki-barrier',
-	          title: _t('issues.fix.tag_as_disconnected.title'),
-	          onClick: function onClick(context) {
-	            var nodeID = this.issue.entityIds[1];
-	            var tags = Object.assign({}, context.entity(nodeID).tags);
-	            tags.noexit = 'yes';
-	            context.perform(
-	              actionChangeTags(nodeID, tags),
-	              _t('issues.fix.tag_as_disconnected.annotation')
-	            );
-	          }
-	        }));
+	      if (imageKey) {
+	        hash.photo = 'streetside/' + imageKey;
+	      } else {
+	        delete hash.photo;
 	      }
 
-	      return fixes;
+	      window.location.replace('#' + utilQsString(hash, true));
 	    }
+	  },
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.almost_junction.highway-highway.reference'));
-	    }
+	  /**
+	   * cache().
+	   */
+	  cache: function cache() {
+	    return _ssCache;
+	  }
+	};
 
-	    function isExtendableCandidate(node, way) {
-	      // can not accurately test vertices on tiles not downloaded from osm - #5938
-	      var osm = services.osm;
-	      if (osm && !osm.isDataLoaded(node.loc)) {
-	        return false;
-	      }
-	      if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
-	        return false;
-	      }
+	var _apibase$1 = 'https://taginfo.openstreetmap.org/api/4/';
+	var _inflight$2 = {};
+	var _popularKeys = {};
+	var _taginfoCache = {};
+	var tag_sorts = {
+	  point: 'count_nodes',
+	  vertex: 'count_nodes',
+	  area: 'count_ways',
+	  line: 'count_ways'
+	};
+	var tag_sort_members = {
+	  point: 'count_node_members',
+	  vertex: 'count_node_members',
+	  area: 'count_way_members',
+	  line: 'count_way_members',
+	  relation: 'count_relation_members'
+	};
+	var tag_filters = {
+	  point: 'nodes',
+	  vertex: 'nodes',
+	  area: 'ways',
+	  line: 'ways'
+	};
+	var tag_members_fractions = {
+	  point: 'count_node_members_fraction',
+	  vertex: 'count_node_members_fraction',
+	  area: 'count_way_members_fraction',
+	  line: 'count_way_members_fraction',
+	  relation: 'count_relation_members_fraction'
+	};
 
-	      var occurences = 0;
-	      for (var index in way.nodes) {
-	        if (way.nodes[index] === node.id) {
-	          occurences += 1;
-	          if (occurences > 1) {
-	            return false;
-	          }
-	        }
-	      }
-	      return true;
-	    }
+	function sets(params, n, o) {
+	  if (params.geometry && o[params.geometry]) {
+	    params[n] = o[params.geometry];
+	  }
 
-	    function findConnectableEndNodesByExtension(way) {
-	      var results = [];
-	      if (way.isClosed()) { return results; }
+	  return params;
+	}
 
-	      var testNodes;
-	      var indices = [0, way.nodes.length - 1];
-	      indices.forEach(function (nodeIndex) {
-	        var nodeID = way.nodes[nodeIndex];
-	        var node = graph.entity(nodeID);
+	function setFilter(params) {
+	  return sets(params, 'filter', tag_filters);
+	}
 
-	        if (!isExtendableCandidate(node, way)) { return; }
+	function setSort(params) {
+	  return sets(params, 'sortname', tag_sorts);
+	}
 
-	        var connectionInfo = canConnectByExtend(way, nodeIndex);
-	        if (!connectionInfo) { return; }
+	function setSortMembers(params) {
+	  return sets(params, 'sortname', tag_sort_members);
+	}
 
-	        testNodes = graph.childNodes(way).slice();   // shallow copy
-	        testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc);
+	function clean(params) {
+	  return utilObjectOmit(params, ['geometry', 'debounce']);
+	}
 
-	        // don't flag issue if connecting the ways would cause self-intersection
-	        if (geoHasSelfIntersections(testNodes, nodeID)) { return; }
+	function filterKeys(type) {
+	  var count_type = type ? 'count_' + type : 'count_all';
+	  return function (d) {
+	    return parseFloat(d[count_type]) > 2500 || d.in_wiki;
+	  };
+	}
 
-	        results.push(connectionInfo);
-	      });
+	function filterMultikeys(prefix) {
+	  return function (d) {
+	    // d.key begins with prefix, and d.key contains no additional ':'s
+	    var re = new RegExp('^' + prefix + '(.*)$');
+	    var matches = d.key.match(re) || [];
+	    return matches.length === 2 && matches[1].indexOf(':') === -1;
+	  };
+	}
 
-	      return results;
-	    }
+	function filterValues(allowUpperCase) {
+	  return function (d) {
+	    if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation
 
-	    function findNearbyEndNodes(node, way) {
-	      return [
-	        way.nodes[0],
-	        way.nodes[way.nodes.length - 1]
-	      ].map(function (d) { return graph.entity(d); })
-	      .filter(function (d) {
-	        // Node cannot be near to itself, but other endnode of same way could be
-	        return d.id !== node.id
-	          && geoSphericalDistance(node.loc, d.loc) <= CLOSE_NODE_TH;
-	      });
-	    }
+	    if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters
 
-	    function findSmallJoinAngle(midNode, tipNode, endNodes) {
-	      // Both nodes could be close, so want to join whichever is closest to collinear
-	      var joinTo;
-	      var minAngle = Infinity;
+	    return parseFloat(d.fraction) > 0.0;
+	  };
+	}
 
-	      // Checks midNode -> tipNode -> endNode for collinearity
-	      endNodes.forEach(function (endNode) {
-	        var a1 = geoAngle(midNode, tipNode, context.projection) + Math.PI;
-	        var a2 = geoAngle(midNode, endNode, context.projection) + Math.PI;
-	        var diff = Math.max(a1, a2) - Math.min(a1, a2);
+	function filterRoles(geometry) {
+	  return function (d) {
+	    if (d.role === '') return false; // exclude empty role
 
-	        if (diff < minAngle) {
-	          joinTo = endNode;
-	          minAngle = diff;
-	        }
-	      });
+	    if (d.role.match(/[A-Z*;,]/) !== null) return false; // exclude uppercase letters and some punctuation
 
-	      /* Threshold set by considering right angle triangle
-	      based on node joining threshold and extension distance */
-	      if (minAngle <= SIG_ANGLE_TH) { return joinTo; }
+	    return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
+	  };
+	}
 
-	      return null;
-	    }
+	function valKey(d) {
+	  return {
+	    value: d.key,
+	    title: d.key
+	  };
+	}
 
-	    function hasTag(tags, key) {
-	      return tags[key] !== undefined && tags[key] !== 'no';
-	    }
+	function valKeyDescription(d) {
+	  var obj = {
+	    value: d.value,
+	    title: d.description || d.value
+	  };
 
-	    function canConnectWays(way, way2) {
+	  if (d.count) {
+	    obj.count = d.count;
+	  }
 
-	      // allow self-connections
-	      if (way.id === way2.id) { return true; }
+	  return obj;
+	}
 
-	      // if one is bridge or tunnel, both must be bridge or tunnel
-	      if ((hasTag(way.tags, 'bridge') || hasTag(way2.tags, 'bridge')) &&
-	        !(hasTag(way.tags, 'bridge') && hasTag(way2.tags, 'bridge'))) { return false; }
-	      if ((hasTag(way.tags, 'tunnel') || hasTag(way2.tags, 'tunnel')) &&
-	        !(hasTag(way.tags, 'tunnel') && hasTag(way2.tags, 'tunnel'))) { return false; }
+	function roleKey(d) {
+	  return {
+	    value: d.role,
+	    title: d.role
+	  };
+	} // sort keys with ':' lower than keys without ':'
 
-	      // must have equivalent layers and levels
-	      var layer1 = way.tags.layer || '0',
-	        layer2 = way2.tags.layer || '0';
-	      if (layer1 !== layer2) { return false; }
 
-	      var level1 = way.tags.level || '0',
-	        level2 = way2.tags.level || '0';
-	      if (level1 !== level2) { return false; }
+	function sortKeys(a, b) {
+	  return a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1 ? -1 : a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1 ? 1 : 0;
+	}
 
-	      return true;
-	    }
+	var debouncedRequest$1 = debounce(request$1, 300, {
+	  leading: false
+	});
 
-	    function canConnectByExtend(way, endNodeIdx) {
-	      var tipNid = way.nodes[endNodeIdx];  // the 'tip' node for extension point
-	      var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2];  // the other node of the edge
-	      var tipNode = graph.entity(tipNid);
-	      var midNode = graph.entity(midNid);
-	      var lon = tipNode.loc[0];
-	      var lat = tipNode.loc[1];
-	      var lon_range = geoMetersToLon(EXTEND_TH_METERS, lat) / 2;
-	      var lat_range = geoMetersToLat(EXTEND_TH_METERS) / 2;
-	      var queryExtent = geoExtent([
-	        [lon - lon_range, lat - lat_range],
-	        [lon + lon_range, lat + lat_range]
-	      ]);
+	function request$1(url, params, exactMatch, callback, loaded) {
+	  if (_inflight$2[url]) return;
+	  if (checkCache(url, params, exactMatch, callback)) return;
+	  var controller = new AbortController();
+	  _inflight$2[url] = controller;
+	  d3_json(url, {
+	    signal: controller.signal
+	  }).then(function (result) {
+	    delete _inflight$2[url];
+	    if (loaded) loaded(null, result);
+	  })["catch"](function (err) {
+	    delete _inflight$2[url];
+	    if (err.name === 'AbortError') return;
+	    if (loaded) loaded(err.message);
+	  });
+	}
 
-	      // first, extend the edge of [midNode -> tipNode] by EXTEND_TH_METERS and find the "extended tip" location
-	      var edgeLen = geoSphericalDistance(midNode.loc, tipNode.loc);
-	      var t = EXTEND_TH_METERS / edgeLen + 1.0;
-	      var extTipLoc = geoVecInterp(midNode.loc, tipNode.loc, t);
+	function checkCache(url, params, exactMatch, callback) {
+	  var rp = params.rp || 25;
+	  var testQuery = params.query || '';
+	  var testUrl = url;
 
-	      // then, check if the extension part [tipNode.loc -> extTipLoc] intersects any other ways
-	      var segmentInfos = tree.waySegments(queryExtent, graph);
-	      for (var i = 0; i < segmentInfos.length; i++) {
-	        var segmentInfo = segmentInfos[i];
+	  do {
+	    var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)
 
-	        var way2 = graph.entity(segmentInfo.wayId);
+	    if (hit && (url === testUrl || hit.length < rp)) {
+	      callback(null, hit);
+	      return true;
+	    } // don't try to shorten the query
 
-	        if (!isHighway(way2)) { continue; }
 
-	        if (!canConnectWays(way, way2)) { continue; }
+	    if (exactMatch || !testQuery.length) return false; // do shorten the query to see if we already have a cached result
+	    // that has returned fewer than max results (rp)
 
-	        var nAid = segmentInfo.nodes[0],
-	          nBid = segmentInfo.nodes[1];
+	    testQuery = testQuery.slice(0, -1);
+	    testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
+	  } while (testQuery.length >= 0);
 
-	        if (nAid === tipNid || nBid === tipNid) { continue; }
+	  return false;
+	}
 
-	        var nA = graph.entity(nAid),
-	          nB = graph.entity(nBid);
-	        var crossLoc = geoLineIntersection([tipNode.loc, extTipLoc], [nA.loc, nB.loc]);
-	        if (crossLoc) {
-	          return {
-	            mid: midNode,
-	            node: tipNode,
-	            wid: way2.id,
-	            edge: [nA.id, nB.id],
-	            cross_loc: crossLoc
-	          };
-	        }
+	var serviceTaginfo = {
+	  init: function init() {
+	    _inflight$2 = {};
+	    _taginfoCache = {};
+	    _popularKeys = {
+	      // manually exclude some keys – #5377, #7485
+	      postal_code: true,
+	      full_name: true,
+	      loc_name: true,
+	      reg_name: true,
+	      short_name: true,
+	      sorting_name: true,
+	      artist_name: true,
+	      nat_name: true,
+	      long_name: true,
+	      'bridge:name': true
+	    }; // Fetch popular keys.  We'll exclude these from `values`
+	    // lookups because they stress taginfo, and they aren't likely
+	    // to yield meaningful autocomplete results.. see #3955
+
+	    var params = {
+	      rp: 100,
+	      sortname: 'values_all',
+	      sortorder: 'desc',
+	      page: 1,
+	      debounce: false,
+	      lang: _mainLocalizer.languageCode()
+	    };
+	    this.keys(params, function (err, data) {
+	      if (err) return;
+	      data.forEach(function (d) {
+	        if (d.value === 'opening_hours') return; // exception
+
+	        _popularKeys[d.value] = true;
+	      });
+	    });
+	  },
+	  reset: function reset() {
+	    Object.values(_inflight$2).forEach(function (controller) {
+	      controller.abort();
+	    });
+	    _inflight$2 = {};
+	  },
+	  keys: function keys(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest$1 : request$1;
+	    params = clean(setSort(params));
+	    params = Object.assign({
+	      rp: 10,
+	      sortname: 'count_all',
+	      sortorder: 'desc',
+	      page: 1,
+	      lang: _mainLocalizer.languageCode()
+	    }, params);
+	    var url = _apibase$1 + 'keys/all?' + utilQsString(params);
+	    doRequest(url, params, false, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        var f = filterKeys(params.filter);
+	        var result = d.data.filter(f).sort(sortKeys).map(valKey);
+	        _taginfoCache[url] = result;
+	        callback(null, result);
 	      }
-	      return null;
-	    }
-	  };
+	    });
+	  },
+	  multikeys: function multikeys(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest$1 : request$1;
+	    params = clean(setSort(params));
+	    params = Object.assign({
+	      rp: 25,
+	      sortname: 'count_all',
+	      sortorder: 'desc',
+	      page: 1,
+	      lang: _mainLocalizer.languageCode()
+	    }, params);
+	    var prefix = params.query;
+	    var url = _apibase$1 + 'keys/all?' + utilQsString(params);
+	    doRequest(url, params, true, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        var f = filterMultikeys(prefix);
+	        var result = d.data.filter(f).map(valKey);
+	        _taginfoCache[url] = result;
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  values: function values(params, callback) {
+	    // Exclude popular keys from values lookups.. see #3955
+	    var key = params.key;
 
-	  validation.type = type;
+	    if (key && _popularKeys[key]) {
+	      callback(null, []);
+	      return;
+	    }
 
-	  return validation;
-	}
+	    var doRequest = params.debounce ? debouncedRequest$1 : request$1;
+	    params = clean(setSort(setFilter(params)));
+	    params = Object.assign({
+	      rp: 25,
+	      sortname: 'count_all',
+	      sortorder: 'desc',
+	      page: 1,
+	      lang: _mainLocalizer.languageCode()
+	    }, params);
+	    var url = _apibase$1 + 'key/values?' + utilQsString(params);
+	    doRequest(url, params, false, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        // In most cases we prefer taginfo value results with lowercase letters.
+	        // A few OSM keys expect values to contain uppercase values (see #3377).
+	        // This is not an exhaustive list (e.g. `name` also has uppercase values)
+	        // but these are the fields where taginfo value lookup is most useful.
+	        var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery/;
+	        var allowUpperCase = re.test(params.key);
+	        var f = filterValues(allowUpperCase);
+	        var result = d.data.filter(f).map(valKeyDescription);
+	        _taginfoCache[url] = result;
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  roles: function roles(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest$1 : request$1;
+	    var geometry = params.geometry;
+	    params = clean(setSortMembers(params));
+	    params = Object.assign({
+	      rp: 25,
+	      sortname: 'count_all_members',
+	      sortorder: 'desc',
+	      page: 1,
+	      lang: _mainLocalizer.languageCode()
+	    }, params);
+	    var url = _apibase$1 + 'relation/roles?' + utilQsString(params);
+	    doRequest(url, params, true, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        var f = filterRoles(geometry);
+	        var result = d.data.filter(f).map(roleKey);
+	        _taginfoCache[url] = result;
+	        callback(null, result);
+	      }
+	    });
+	  },
+	  docs: function docs(params, callback) {
+	    var doRequest = params.debounce ? debouncedRequest$1 : request$1;
+	    params = clean(setSort(params));
+	    var path = 'key/wiki_pages?';
 
-	function validationCloseNodes(context) {
-	    var type = 'close_nodes';
+	    if (params.value) {
+	      path = 'tag/wiki_pages?';
+	    } else if (params.rtype) {
+	      path = 'relation/wiki_pages?';
+	    }
 
-	    var pointThresholdMeters = 0.2;
+	    var url = _apibase$1 + path + utilQsString(params);
+	    doRequest(url, params, true, callback, function (err, d) {
+	      if (err) {
+	        callback(err);
+	      } else {
+	        _taginfoCache[url] = d.data;
+	        callback(null, d.data);
+	      }
+	    });
+	  },
+	  apibase: function apibase(_) {
+	    if (!arguments.length) return _apibase$1;
+	    _apibase$1 = _;
+	    return this;
+	  }
+	};
 
-	    var validation = function(entity, graph) {
-	        if (entity.type === 'node') {
-	            return getIssuesForNode(entity);
-	        } else if (entity.type === 'way') {
-	            return getIssuesForWay(entity);
-	        }
-	        return [];
+	var helpers$1 = createCommonjsModule(function (module, exports) {
 
-	        function getIssuesForNode(node) {
-	            var parentWays = graph.parentWays(node);
-	            if (parentWays.length) {
-	                return getIssuesForVertex(node, parentWays);
-	            } else {
-	                return getIssuesForDetachedPoint(node);
-	            }
-	        }
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
+	  /**
+	   * @module helpers
+	   */
 
-	        function wayTypeFor(way) {
+	  /**
+	   * Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.
+	   *
+	   * @memberof helpers
+	   * @type {number}
+	   */
 
-	            if (way.tags.boundary && way.tags.boundary !== 'no') { return 'boundary'; }
-	            if (way.tags.indoor && way.tags.indoor !== 'no') { return 'indoor'; }
-	            if ((way.tags.building && way.tags.building !== 'no') ||
-	                (way.tags['building:part'] && way.tags['building:part'] !== 'no')) { return 'building'; }
-	            if (osmPathHighwayTagValues[way.tags.highway]) { return 'path'; }
+	  exports.earthRadius = 6371008.8;
+	  /**
+	   * Unit of measurement factors using a spherical (non-ellipsoid) earth radius.
+	   *
+	   * @memberof helpers
+	   * @type {Object}
+	   */
 
-	            var parentRelations = graph.parentRelations(way);
-	            for (var i in parentRelations) {
-	                var relation = parentRelations[i];
+	  exports.factors = {
+	    centimeters: exports.earthRadius * 100,
+	    centimetres: exports.earthRadius * 100,
+	    degrees: exports.earthRadius / 111325,
+	    feet: exports.earthRadius * 3.28084,
+	    inches: exports.earthRadius * 39.370,
+	    kilometers: exports.earthRadius / 1000,
+	    kilometres: exports.earthRadius / 1000,
+	    meters: exports.earthRadius,
+	    metres: exports.earthRadius,
+	    miles: exports.earthRadius / 1609.344,
+	    millimeters: exports.earthRadius * 1000,
+	    millimetres: exports.earthRadius * 1000,
+	    nauticalmiles: exports.earthRadius / 1852,
+	    radians: 1,
+	    yards: exports.earthRadius / 1.0936
+	  };
+	  /**
+	   * Units of measurement factors based on 1 meter.
+	   *
+	   * @memberof helpers
+	   * @type {Object}
+	   */
 
-	                if (relation.tags.type === 'boundary') { return 'boundary'; }
+	  exports.unitsFactors = {
+	    centimeters: 100,
+	    centimetres: 100,
+	    degrees: 1 / 111325,
+	    feet: 3.28084,
+	    inches: 39.370,
+	    kilometers: 1 / 1000,
+	    kilometres: 1 / 1000,
+	    meters: 1,
+	    metres: 1,
+	    miles: 1 / 1609.344,
+	    millimeters: 1000,
+	    millimetres: 1000,
+	    nauticalmiles: 1 / 1852,
+	    radians: 1 / exports.earthRadius,
+	    yards: 1 / 1.0936
+	  };
+	  /**
+	   * Area of measurement factors based on 1 square meter.
+	   *
+	   * @memberof helpers
+	   * @type {Object}
+	   */
 
-	                if (relation.isMultipolygon()) {
-	                    if (relation.tags.indoor && relation.tags.indoor !== 'no') { return 'indoor'; }
-	                    if ((relation.tags.building && relation.tags.building !== 'no') ||
-	                        (relation.tags['building:part'] && relation.tags['building:part'] !== 'no')) { return 'building'; }
-	                }
-	            }
+	  exports.areaFactors = {
+	    acres: 0.000247105,
+	    centimeters: 10000,
+	    centimetres: 10000,
+	    feet: 10.763910417,
+	    inches: 1550.003100006,
+	    kilometers: 0.000001,
+	    kilometres: 0.000001,
+	    meters: 1,
+	    metres: 1,
+	    miles: 3.86e-7,
+	    millimeters: 1000000,
+	    millimetres: 1000000,
+	    yards: 1.195990046
+	  };
+	  /**
+	   * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
+	   *
+	   * @name feature
+	   * @param {Geometry} geometry input geometry
+	   * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	   * @param {Object} [options={}] Optional Parameters
+	   * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	   * @param {string|number} [options.id] Identifier associated with the Feature
+	   * @returns {Feature} a GeoJSON Feature
+	   * @example
+	   * var geometry = {
+	   *   "type": "Point",
+	   *   "coordinates": [110, 50]
+	   * };
+	   *
+	   * var feature = turf.feature(geometry);
+	   *
+	   * //=feature
+	   */
 
-	            return 'other';
-	        }
+	  function feature(geom, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	        function shouldCheckWay(way) {
+	    var feat = {
+	      type: "Feature"
+	    };
 
-	            // don't flag issues where merging would create degenerate ways
-	            if (way.nodes.length <= 2 ||
-	                (way.isClosed() && way.nodes.length <= 4)) { return false; }
+	    if (options.id === 0 || options.id) {
+	      feat.id = options.id;
+	    }
 
-	            var bbox = way.extent(graph).bbox();
-	            var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]);
-	            // don't flag close nodes in very small ways
-	            if (hypotenuseMeters < 1.5) { return false; }
+	    if (options.bbox) {
+	      feat.bbox = options.bbox;
+	    }
 
-	            return true;
-	        }
+	    feat.properties = properties || {};
+	    feat.geometry = geom;
+	    return feat;
+	  }
 
-	        function getIssuesForWay(way) {
-	            if (!shouldCheckWay(way)) { return []; }
+	  exports.feature = feature;
+	  /**
+	   * Creates a GeoJSON {@link Geometry} from a Geometry string type & coordinates.
+	   * For GeometryCollection type use `helpers.geometryCollection`
+	   *
+	   * @name geometry
+	   * @param {string} type Geometry Type
+	   * @param {Array<any>} coordinates Coordinates
+	   * @param {Object} [options={}] Optional Parameters
+	   * @returns {Geometry} a GeoJSON Geometry
+	   * @example
+	   * var type = "Point";
+	   * var coordinates = [110, 50];
+	   * var geometry = turf.geometry(type, coordinates);
+	   * // => geometry
+	   */
 
-	            var issues = [],
-	                nodes = graph.childNodes(way);
-	            for (var i = 0; i < nodes.length - 1; i++) {
-	                var node1 = nodes[i];
-	                var node2 = nodes[i+1];
+	  function geometry(type, coordinates, options) {
 
-	                var issue = getWayIssueIfAny(node1, node2, way);
-	                if (issue) { issues.push(issue); }
-	            }
-	            return issues;
-	        }
+	    switch (type) {
+	      case "Point":
+	        return point(coordinates).geometry;
 
-	        function getIssuesForVertex(node, parentWays) {
-	            var issues = [];
+	      case "LineString":
+	        return lineString(coordinates).geometry;
 
-	            function checkForCloseness(node1, node2, way) {
-	                var issue = getWayIssueIfAny(node1, node2, way);
-	                if (issue) { issues.push(issue); }
-	            }
+	      case "Polygon":
+	        return polygon(coordinates).geometry;
 
-	            for (var i = 0; i < parentWays.length; i++) {
-	                var parentWay = parentWays[i];
+	      case "MultiPoint":
+	        return multiPoint(coordinates).geometry;
 
-	                if (!shouldCheckWay(parentWay)) { continue; }
+	      case "MultiLineString":
+	        return multiLineString(coordinates).geometry;
 
-	                var lastIndex = parentWay.nodes.length - 1;
-	                for (var j = 0; j < parentWay.nodes.length; j++) {
-	                    if (j !== 0) {
-	                        if (parentWay.nodes[j-1] === node.id) {
-	                            checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);
-	                        }
-	                    }
-	                    if (j !== lastIndex) {
-	                        if (parentWay.nodes[j+1] === node.id) {
-	                            checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
-	                        }
-	                    }
-	                }
-	            }
-	            return issues;
-	        }
+	      case "MultiPolygon":
+	        return multiPolygon(coordinates).geometry;
 
-	        function thresholdMetersForWay(way) {
-	            if (!shouldCheckWay(way)) { return 0; }
+	      default:
+	        throw new Error(type + " is invalid");
+	    }
+	  }
 
-	            var wayType = wayTypeFor(way);
+	  exports.geometry = geometry;
+	  /**
+	   * Creates a {@link Point} {@link Feature} from a Position.
+	   *
+	   * @name point
+	   * @param {Array<number>} coordinates longitude, latitude position (each in decimal degrees)
+	   * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	   * @param {Object} [options={}] Optional Parameters
+	   * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	   * @param {string|number} [options.id] Identifier associated with the Feature
+	   * @returns {Feature<Point>} a Point feature
+	   * @example
+	   * var point = turf.point([-75.343, 39.984]);
+	   *
+	   * //=point
+	   */
 
-	            // don't flag boundaries since they might be highly detailed and can't be easily verified
-	            if (wayType === 'boundary') { return 0; }
-	            // expect some features to be mapped with higher levels of detail
-	            if (wayType === 'indoor') { return 0.01; }
-	            if (wayType === 'building') { return 0.05; }
-	            if (wayType === 'path') { return 0.1; }
-	            return 0.2;
-	        }
+	  function point(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	        function getIssuesForDetachedPoint(node) {
+	    var geom = {
+	      type: "Point",
+	      coordinates: coordinates
+	    };
+	    return feature(geom, properties, options);
+	  }
 
-	            var issues = [];
+	  exports.point = point;
+	  /**
+	   * Creates a {@link Point} {@link FeatureCollection} from an Array of Point coordinates.
+	   *
+	   * @name points
+	   * @param {Array<Array<number>>} coordinates an array of Points
+	   * @param {Object} [properties={}] Translate these properties to each Feature
+	   * @param {Object} [options={}] Optional Parameters
+	   * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]
+	   * associated with the FeatureCollection
+	   * @param {string|number} [options.id] Identifier associated with the FeatureCollection
+	   * @returns {FeatureCollection<Point>} Point Feature
+	   * @example
+	   * var points = turf.points([
+	   *   [-75, 39],
+	   *   [-80, 45],
+	   *   [-78, 50]
+	   * ]);
+	   *
+	   * //=points
+	   */
 
-	            var lon = node.loc[0];
-	            var lat = node.loc[1];
-	            var lon_range = geoMetersToLon(pointThresholdMeters, lat) / 2;
-	            var lat_range = geoMetersToLat(pointThresholdMeters) / 2;
-	            var queryExtent = geoExtent([
-	                [lon - lon_range, lat - lat_range],
-	                [lon + lon_range, lat + lat_range]
-	            ]);
+	  function points(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	            var intersected = context.history().tree().intersects(queryExtent, graph);
-	            for (var j = 0; j < intersected.length; j++) {
-	                var nearby = intersected[j];
+	    return featureCollection(coordinates.map(function (coords) {
+	      return point(coords, properties);
+	    }), options);
+	  }
 
-	                if (nearby.id === node.id) { continue; }
-	                if (nearby.type !== 'node' || nearby.geometry(graph) !== 'point') { continue; }
+	  exports.points = points;
+	  /**
+	   * Creates a {@link Polygon} {@link Feature} from an Array of LinearRings.
+	   *
+	   * @name polygon
+	   * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
+	   * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	   * @param {Object} [options={}] Optional Parameters
+	   * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	   * @param {string|number} [options.id] Identifier associated with the Feature
+	   * @returns {Feature<Polygon>} Polygon Feature
+	   * @example
+	   * var polygon = turf.polygon([[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]], { name: 'poly1' });
+	   *
+	   * //=polygon
+	   */
 
-	                if (nearby.loc === node.loc ||
-	                    geoSphericalDistance(node.loc, nearby.loc) < pointThresholdMeters) {
+	  function polygon(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	                    // allow very close points if tags indicate the z-axis might vary
-	                    var zAxisKeys = { layer: true, level: true, 'addr:housenumber': true, 'addr:unit': true };
-	                    var zAxisDifferentiates = false;
-	                    for (var key in zAxisKeys) {
-	                        var nodeValue = node.tags[key] || '0';
-	                        var nearbyValue = nearby.tags[key] || '0';
-	                        if (nodeValue !== nearbyValue) {
-	                            zAxisDifferentiates = true;
-	                            break;
-	                        }
-	                    }
-	                    if (zAxisDifferentiates) { continue; }
-
-	                    issues.push(new validationIssue({
-	                        type: type,
-	                        subtype: 'detached',
-	                        severity: 'warning',
-	                        message: function(context) {
-	                            var entity = context.hasEntity(this.entityIds[0]),
-	                                entity2 = context.hasEntity(this.entityIds[1]);
-	                            return (entity && entity2) ? _t('issues.close_nodes.detached.message', {
-	                                feature: utilDisplayLabel(entity, context.graph()),
-	                                feature2: utilDisplayLabel(entity2, context.graph())
-	                            }) : '';
-	                        },
-	                        reference: showReference,
-	                        entityIds: [node.id, nearby.id],
-	                        dynamicFixes: function() {
-	                            return [
-	                                new validationIssueFix({
-	                                    icon: 'iD-operation-disconnect',
-	                                    title: _t('issues.fix.move_points_apart.title')
-	                                }),
-	                                new validationIssueFix({
-	                                    icon: 'iD-icon-layers',
-	                                    title: _t('issues.fix.use_different_layers_or_levels.title')
-	                                })
-	                            ];
-	                        }
-	                    }));
-	                }
-	            }
+	    for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
+	      var ring = coordinates_1[_i];
 
-	            return issues;
+	      if (ring.length < 4) {
+	        throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
+	      }
 
-	            function showReference(selection) {
-	                var referenceText = _t('issues.close_nodes.detached.reference');
-	                selection.selectAll('.issue-reference')
-	                    .data([0])
-	                    .enter()
-	                    .append('div')
-	                    .attr('class', 'issue-reference')
-	                    .text(referenceText);
-	            }
+	      for (var j = 0; j < ring[ring.length - 1].length; j++) {
+	        // Check if first point of Polygon contains two numbers
+	        if (ring[ring.length - 1][j] !== ring[0][j]) {
+	          throw new Error("First and last Position are not equivalent.");
 	        }
+	      }
+	    }
 
-	        function getWayIssueIfAny(node1, node2, way) {
-	            if (node1.id === node2.id ||
-	                (node1.hasInterestingTags() && node2.hasInterestingTags())) {
-	                return null;
-	            }
+	    var geom = {
+	      type: "Polygon",
+	      coordinates: coordinates
+	    };
+	    return feature(geom, properties, options);
+	  }
 
-	            if (node1.loc !== node2.loc) {
-	                var parentWays1 = graph.parentWays(node1);
-	                var parentWays2 = new Set(graph.parentWays(node2));
+	  exports.polygon = polygon;
+	  /**
+	   * Creates a {@link Polygon} {@link FeatureCollection} from an Array of Polygon coordinates.
+	   *
+	   * @name polygons
+	   * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygon coordinates
+	   * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	   * @param {Object} [options={}] Optional Parameters
+	   * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	   * @param {string|number} [options.id] Identifier associated with the FeatureCollection
+	   * @returns {FeatureCollection<Polygon>} Polygon FeatureCollection
+	   * @example
+	   * var polygons = turf.polygons([
+	   *   [[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]],
+	   *   [[[-15, 42], [-14, 46], [-12, 41], [-17, 44], [-15, 42]]],
+	   * ]);
+	   *
+	   * //=polygons
+	   */
 
-	                var sharedWays = parentWays1.filter(function(parentWay) {
-	                    return parentWays2.has(parentWay);
-	                });
+	  function polygons(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	                var thresholds = sharedWays.map(function(parentWay) {
-	                    return thresholdMetersForWay(parentWay);
-	                });
+	    return featureCollection(coordinates.map(function (coords) {
+	      return polygon(coords, properties);
+	    }), options);
+	  }
 
-	                var threshold = Math.min.apply(Math, thresholds);
-	                var distance = geoSphericalDistance(node1.loc, node2.loc);
-	                if (distance > threshold) { return null; }
-	            }
+	  exports.polygons = polygons;
+	  /**
+	   * Creates a {@link LineString} {@link Feature} from an Array of Positions.
+	   *
+	   * @name lineString
+	   * @param {Array<Array<number>>} coordinates an array of Positions
+	   * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	   * @param {Object} [options={}] Optional Parameters
+	   * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	   * @param {string|number} [options.id] Identifier associated with the Feature
+	   * @returns {Feature<LineString>} LineString Feature
+	   * @example
+	   * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});
+	   * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});
+	   *
+	   * //=linestring1
+	   * //=linestring2
+	   */
 
-	            return new validationIssue({
-	                type: type,
-	                subtype: 'vertices',
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.close_nodes.message', { way: utilDisplayLabel(entity, context.graph()) }) : '';
-	                },
-	                reference: showReference,
-	                entityIds: [way.id, node1.id, node2.id],
-	                loc: node1.loc,
-	                dynamicFixes: function() {
-	                    return [
-	                        new validationIssueFix({
-	                            icon: 'iD-icon-plus',
-	                            title: _t('issues.fix.merge_points.title'),
-	                            onClick: function(context) {
-	                                var entityIds = this.issue.entityIds;
-	                                var action = actionMergeNodes([entityIds[1], entityIds[2]]);
-	                                context.perform(action, _t('issues.fix.merge_close_vertices.annotation'));
-	                            }
-	                        }),
-	                        new validationIssueFix({
-	                            icon: 'iD-operation-disconnect',
-	                            title: _t('issues.fix.move_points_apart.title')
-	                        })
-	                    ];
-	                }
-	            });
+	  function lineString(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	            function showReference(selection) {
-	                var referenceText = _t('issues.close_nodes.reference');
-	                selection.selectAll('.issue-reference')
-	                    .data([0])
-	                    .enter()
-	                    .append('div')
-	                    .attr('class', 'issue-reference')
-	                    .text(referenceText);
-	            }
-	        }
+	    if (coordinates.length < 2) {
+	      throw new Error("coordinates must be an array of two or more positions");
+	    }
 
+	    var geom = {
+	      type: "LineString",
+	      coordinates: coordinates
 	    };
+	    return feature(geom, properties, options);
+	  }
 
+	  exports.lineString = lineString;
+	  /**
+	   * Creates a {@link LineString} {@link FeatureCollection} from an Array of LineString coordinates.
+	   *
+	   * @name lineStrings
+	   * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
+	   * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	   * @param {Object} [options={}] Optional Parameters
+	   * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]
+	   * associated with the FeatureCollection
+	   * @param {string|number} [options.id] Identifier associated with the FeatureCollection
+	   * @returns {FeatureCollection<LineString>} LineString FeatureCollection
+	   * @example
+	   * var linestrings = turf.lineStrings([
+	   *   [[-24, 63], [-23, 60], [-25, 65], [-20, 69]],
+	   *   [[-14, 43], [-13, 40], [-15, 45], [-10, 49]]
+	   * ]);
+	   *
+	   * //=linestrings
+	   */
 
-	    validation.type = type;
+	  function lineStrings(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	    return validation;
-	}
+	    return featureCollection(coordinates.map(function (coords) {
+	      return lineString(coords, properties);
+	    }), options);
+	  }
 
-	function validationCrossingWays(context) {
-	    var type = 'crossing_ways';
-
-	    // returns the way or its parent relation, whichever has a useful feature type
-	    function getFeatureWithFeatureTypeTagsForWay(way, graph) {
-	        if (getFeatureType(way, graph) === null) {
-	            // if the way doesn't match a feature type, check its parent relations
-	            var parentRels = graph.parentRelations(way);
-	            for (var i = 0; i < parentRels.length; i++) {
-	                var rel = parentRels[i];
-	                if (getFeatureType(rel, graph) !== null) {
-	                    return rel;
-	                }
-	            }
-	        }
-	        return way;
+	  exports.lineStrings = lineStrings;
+	  /**
+	   * Takes one or more {@link Feature|Features} and creates a {@link FeatureCollection}.
+	   *
+	   * @name featureCollection
+	   * @param {Feature[]} features input features
+	   * @param {Object} [options={}] Optional Parameters
+	   * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	   * @param {string|number} [options.id] Identifier associated with the Feature
+	   * @returns {FeatureCollection} FeatureCollection of Features
+	   * @example
+	   * var locationA = turf.point([-75.343, 39.984], {name: 'Location A'});
+	   * var locationB = turf.point([-75.833, 39.284], {name: 'Location B'});
+	   * var locationC = turf.point([-75.534, 39.123], {name: 'Location C'});
+	   *
+	   * var collection = turf.featureCollection([
+	   *   locationA,
+	   *   locationB,
+	   *   locationC
+	   * ]);
+	   *
+	   * //=collection
+	   */
+
+	  function featureCollection(features, options) {
+	    if (options === void 0) {
+	      options = {};
 	    }
 
+	    var fc = {
+	      type: "FeatureCollection"
+	    };
 
-	    function hasTag(tags, key) {
-	        return tags[key] !== undefined && tags[key] !== 'no';
+	    if (options.id) {
+	      fc.id = options.id;
 	    }
 
-	    function taggedAsIndoor(tags) {
-	        return hasTag(tags, 'indoor') ||
-	            hasTag(tags, 'level') ||
-	            tags.highway === 'corridor';
+	    if (options.bbox) {
+	      fc.bbox = options.bbox;
 	    }
 
-	    function allowsBridge(featureType) {
-	        return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-	    }
-	    function allowsTunnel(featureType) {
-	        return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-	    }
+	    fc.features = features;
+	    return fc;
+	  }
 
+	  exports.featureCollection = featureCollection;
+	  /**
+	   * Creates a {@link Feature<MultiLineString>} based on a
+	   * coordinate array. Properties can be added optionally.
+	   *
+	   * @name multiLineString
+	   * @param {Array<Array<Array<number>>>} coordinates an array of LineStrings
+	   * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	   * @param {Object} [options={}] Optional Parameters
+	   * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	   * @param {string|number} [options.id] Identifier associated with the Feature
+	   * @returns {Feature<MultiLineString>} a MultiLineString feature
+	   * @throws {Error} if no coordinates are passed
+	   * @example
+	   * var multiLine = turf.multiLineString([[[0,0],[10,10]]]);
+	   *
+	   * //=multiLine
+	   */
 
-	    function getFeatureTypeForCrossingCheck(way, graph) {
-	        var feature = getFeatureWithFeatureTypeTagsForWay(way, graph);
-	        return getFeatureType(feature, graph);
+	  function multiLineString(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
 	    }
 
-	    // discard
-	    var ignoredBuildings = {
-	        demolished: true, dismantled: true, proposed: true, razed: true
+	    var geom = {
+	      type: "MultiLineString",
+	      coordinates: coordinates
 	    };
+	    return feature(geom, properties, options);
+	  }
 
+	  exports.multiLineString = multiLineString;
+	  /**
+	   * Creates a {@link Feature<MultiPoint>} based on a
+	   * coordinate array. Properties can be added optionally.
+	   *
+	   * @name multiPoint
+	   * @param {Array<Array<number>>} coordinates an array of Positions
+	   * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	   * @param {Object} [options={}] Optional Parameters
+	   * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	   * @param {string|number} [options.id] Identifier associated with the Feature
+	   * @returns {Feature<MultiPoint>} a MultiPoint feature
+	   * @throws {Error} if no coordinates are passed
+	   * @example
+	   * var multiPt = turf.multiPoint([[0,0],[10,10]]);
+	   *
+	   * //=multiPt
+	   */
 
-	    function getFeatureType(entity, graph) {
+	  function multiPoint(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	        var geometry = entity.geometry(graph);
-	        if (geometry !== 'line' && geometry !== 'area') { return null; }
+	    var geom = {
+	      type: "MultiPoint",
+	      coordinates: coordinates
+	    };
+	    return feature(geom, properties, options);
+	  }
 
-	        var tags = entity.tags;
+	  exports.multiPoint = multiPoint;
+	  /**
+	   * Creates a {@link Feature<MultiPolygon>} based on a
+	   * coordinate array. Properties can be added optionally.
+	   *
+	   * @name multiPolygon
+	   * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons
+	   * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	   * @param {Object} [options={}] Optional Parameters
+	   * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	   * @param {string|number} [options.id] Identifier associated with the Feature
+	   * @returns {Feature<MultiPolygon>} a multipolygon feature
+	   * @throws {Error} if no coordinates are passed
+	   * @example
+	   * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);
+	   *
+	   * //=multiPoly
+	   *
+	   */
 
-	        if (hasTag(tags, 'building') && !ignoredBuildings[tags.building]) { return 'building'; }
-	        if (hasTag(tags, 'highway') && osmRoutableHighwayTagValues[tags.highway]) { return 'highway'; }
+	  function multiPolygon(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	        // don't check railway or waterway areas
-	        if (geometry !== 'line') { return null; }
+	    var geom = {
+	      type: "MultiPolygon",
+	      coordinates: coordinates
+	    };
+	    return feature(geom, properties, options);
+	  }
 
-	        if (hasTag(tags, 'railway') && osmRailwayTrackTagValues[tags.railway]) { return 'railway'; }
-	        if (hasTag(tags, 'waterway') && osmFlowingWaterwayTagValues[tags.waterway]) { return 'waterway'; }
+	  exports.multiPolygon = multiPolygon;
+	  /**
+	   * Creates a {@link Feature<GeometryCollection>} based on a
+	   * coordinate array. Properties can be added optionally.
+	   *
+	   * @name geometryCollection
+	   * @param {Array<Geometry>} geometries an array of GeoJSON Geometries
+	   * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+	   * @param {Object} [options={}] Optional Parameters
+	   * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+	   * @param {string|number} [options.id] Identifier associated with the Feature
+	   * @returns {Feature<GeometryCollection>} a GeoJSON GeometryCollection Feature
+	   * @example
+	   * var pt = turf.geometry("Point", [100, 0]);
+	   * var line = turf.geometry("LineString", [[101, 0], [102, 1]]);
+	   * var collection = turf.geometryCollection([pt, line]);
+	   *
+	   * // => collection
+	   */
 
-	        return null;
+	  function geometryCollection(geometries, properties, options) {
+	    if (options === void 0) {
+	      options = {};
 	    }
 
+	    var geom = {
+	      type: "GeometryCollection",
+	      geometries: geometries
+	    };
+	    return feature(geom, properties, options);
+	  }
 
-	    function isLegitCrossing(way1, featureType1, way2, featureType2) {
-	        var tags1 = way1.tags;
-	        var tags2 = way2.tags;
+	  exports.geometryCollection = geometryCollection;
+	  /**
+	   * Round number to precision
+	   *
+	   * @param {number} num Number
+	   * @param {number} [precision=0] Precision
+	   * @returns {number} rounded number
+	   * @example
+	   * turf.round(120.4321)
+	   * //=120
+	   *
+	   * turf.round(120.4321, 2)
+	   * //=120.43
+	   */
 
-	        // assume 0 by default
-	        var level1 = tags1.level || '0';
-	        var level2 = tags2.level || '0';
+	  function round(num, precision) {
+	    if (precision === void 0) {
+	      precision = 0;
+	    }
 
-	        if (taggedAsIndoor(tags1) && taggedAsIndoor(tags2) && level1 !== level2) {
-	            // assume features don't interact if they're indoor on different levels
-	            return true;
-	        }
+	    if (precision && !(precision >= 0)) {
+	      throw new Error("precision must be a positive number");
+	    }
 
-	        // assume 0 by default; don't use way.layer() since we account for structures here
-	        var layer1 = tags1.layer || '0';
-	        var layer2 = tags2.layer || '0';
+	    var multiplier = Math.pow(10, precision || 0);
+	    return Math.round(num * multiplier) / multiplier;
+	  }
 
-	        if (allowsBridge(featureType1) && allowsBridge(featureType2)) {
-	            if (hasTag(tags1, 'bridge') && !hasTag(tags2, 'bridge')) { return true; }
-	            if (!hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge')) { return true; }
-	            // crossing bridges must use different layers
-	            if (hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge') && layer1 !== layer2) { return true; }
-	        } else if (allowsBridge(featureType1) && hasTag(tags1, 'bridge')) { return true; }
-	        else if (allowsBridge(featureType2) && hasTag(tags2, 'bridge')) { return true; }
+	  exports.round = round;
+	  /**
+	   * Convert a distance measurement (assuming a spherical Earth) from radians to a more friendly unit.
+	   * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
+	   *
+	   * @name radiansToLength
+	   * @param {number} radians in radians across the sphere
+	   * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
+	   * meters, kilometres, kilometers.
+	   * @returns {number} distance
+	   */
 
-	        if (allowsTunnel(featureType1) && allowsTunnel(featureType2)) {
-	            if (hasTag(tags1, 'tunnel') && !hasTag(tags2, 'tunnel')) { return true; }
-	            if (!hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel')) { return true; }
-	            // crossing tunnels must use different layers
-	            if (hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel') && layer1 !== layer2) { return true; }
-	        } else if (allowsTunnel(featureType1) && hasTag(tags1, 'tunnel')) { return true; }
-	        else if (allowsTunnel(featureType2) && hasTag(tags2, 'tunnel')) { return true; }
+	  function radiansToLength(radians, units) {
+	    if (units === void 0) {
+	      units = "kilometers";
+	    }
 
-	        // don't flag crossing waterways and pier/highways
-	        if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') { return true; }
-	        if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') { return true; }
+	    var factor = exports.factors[units];
 
-	        if (featureType1 === 'building' || featureType2 === 'building') {
-	            // for building crossings, different layers are enough
-	            if (layer1 !== layer2) { return true; }
-	        }
-	        return false;
+	    if (!factor) {
+	      throw new Error(units + " units is invalid");
 	    }
 
+	    return radians * factor;
+	  }
 
-	    // highway values for which we shouldn't recommend connecting to waterways
-	    var highwaysDisallowingFords = {
-	        motorway: true, motorway_link: true, trunk: true, trunk_link: true,
-	        primary: true, primary_link: true, secondary: true, secondary_link: true
-	    };
-	    var nonCrossingHighways = { track: true };
-
-	    function tagsForConnectionNodeIfAllowed(entity1, entity2, graph) {
-	        var featureType1 = getFeatureType(entity1, graph);
-	        var featureType2 = getFeatureType(entity2, graph);
-
-	        var geometry1 = entity1.geometry(graph);
-	        var geometry2 = entity2.geometry(graph);
-	        var bothLines = geometry1 === 'line' && geometry2 === 'line';
-
-	        if (featureType1 === featureType2) {
-	            if (featureType1 === 'highway') {
-	                var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
-	                var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
-	                if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
-	                    // one feature is a path but not both
-
-	                    var roadFeature = entity1IsPath ? entity2 : entity1;
-	                    if (nonCrossingHighways[roadFeature.tags.highway]) {
-	                        // don't mark path connections with certain roads as crossings
-	                        return {};
-	                    }
-	                    var pathFeature = entity1IsPath ? entity1 : entity2;
-	                    if (['marked', 'unmarked'].indexOf(pathFeature.tags.crossing) !== -1) {
-	                        // if the path is a crossing, match the crossing type
-	                        return bothLines ? { highway: 'crossing', crossing: pathFeature.tags.crossing } : {};
-	                    }
-	                    // don't add a `crossing` subtag to ambiguous crossings
-	                    return bothLines ? { highway: 'crossing' } : {};
-	                }
-	                return {};
-	            }
-	            if (featureType1 === 'waterway') { return {}; }
-	            if (featureType1 === 'railway') { return {}; }
+	  exports.radiansToLength = radiansToLength;
+	  /**
+	   * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into radians
+	   * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
+	   *
+	   * @name lengthToRadians
+	   * @param {number} distance in real units
+	   * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
+	   * meters, kilometres, kilometers.
+	   * @returns {number} radians
+	   */
 
-	        } else {
-	            var featureTypes = [featureType1, featureType2];
-	            if (featureTypes.indexOf('highway') !== -1) {
-	                if (featureTypes.indexOf('railway') !== -1) {
-	                    if (osmPathHighwayTagValues[entity1.tags.highway] ||
-	                        osmPathHighwayTagValues[entity2.tags.highway]) {
-	                        // path-rail connections use this tag
-	                        return bothLines ? { railway: 'crossing' } : {};
-	                    } else {
-	                        // road-rail connections use this tag
-	                        return bothLines ? { railway: 'level_crossing' } : {};
-	                    }
-	                }
+	  function lengthToRadians(distance, units) {
+	    if (units === void 0) {
+	      units = "kilometers";
+	    }
 
-	                if (featureTypes.indexOf('waterway') !== -1) {
-	                    // do not allow fords on structures
-	                    if (hasTag(entity1.tags, 'tunnel') && hasTag(entity2.tags, 'tunnel')) { return null; }
-	                    if (hasTag(entity1.tags, 'bridge') && hasTag(entity2.tags, 'bridge')) { return null; }
+	    var factor = exports.factors[units];
 
-	                    if (highwaysDisallowingFords[entity1.tags.highway] ||
-	                        highwaysDisallowingFords[entity2.tags.highway]) {
-	                        // do not allow fords on major highways
-	                        return null;
-	                    }
-	                    return bothLines ? { ford: 'yes' } : {};
-	                }
-	            }
-	        }
-	        return null;
+	    if (!factor) {
+	      throw new Error(units + " units is invalid");
 	    }
 
+	    return distance / factor;
+	  }
 
-	    function findCrossingsByWay(way1, graph, tree) {
-	        var edgeCrossInfos = [];
-	        if (way1.type !== 'way') { return edgeCrossInfos; }
-
-	        var way1FeatureType = getFeatureTypeForCrossingCheck(way1, graph);
-	        if (way1FeatureType === null) { return edgeCrossInfos; }
-
-	        var checkedSingleCrossingWays = {};
-
-	        // declare vars ahead of time to reduce garbage collection
-	        var i, j;
-	        var extent;
-	        var n1, n2, nA, nB, nAId, nBId;
-	        var segment1, segment2;
-	        var oneOnly;
-	        var segmentInfos, segment2Info, way2, way2FeatureType;
-	        var way1Nodes = graph.childNodes(way1);
-	        var comparedWays = {};
-	        for (i = 0; i < way1Nodes.length - 1; i++) {
-	            n1 = way1Nodes[i];
-	            n2 = way1Nodes[i + 1];
-	            extent = geoExtent([
-	                [
-	                    Math.min(n1.loc[0], n2.loc[0]),
-	                    Math.min(n1.loc[1], n2.loc[1])
-	                ],
-	                [
-	                    Math.max(n1.loc[0], n2.loc[0]),
-	                    Math.max(n1.loc[1], n2.loc[1])
-	                ]
-	            ]);
-
-	            // Optimize by only checking overlapping segments, not every segment
-	            // of overlapping ways
-	            segmentInfos = tree.waySegments(extent, graph);
-
-	            for (j = 0; j < segmentInfos.length; j++) {
-	                segment2Info = segmentInfos[j];
-
-	                // don't check for self-intersection in this validation
-	                if (segment2Info.wayId === way1.id) { continue; }
-
-	                // skip if this way was already checked and only one issue is needed
-	                if (checkedSingleCrossingWays[segment2Info.wayId]) { continue; }
-
-	                // mark this way as checked even if there are no crossings
-	                comparedWays[segment2Info.wayId] = true;
-
-	                way2 = graph.hasEntity(segment2Info.wayId);
-	                if (!way2) { continue; }
-
-	                // only check crossing highway, waterway, building, and railway
-	                way2FeatureType = getFeatureTypeForCrossingCheck(way2, graph);
-	                if (way2FeatureType === null ||
-	                    isLegitCrossing(way1, way1FeatureType, way2, way2FeatureType)) {
-	                    continue;
-	                }
-
-	                // create only one issue for building crossings
-	                oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+	  exports.lengthToRadians = lengthToRadians;
+	  /**
+	   * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into degrees
+	   * Valid units: miles, nauticalmiles, inches, yards, meters, metres, centimeters, kilometres, feet
+	   *
+	   * @name lengthToDegrees
+	   * @param {number} distance in real units
+	   * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
+	   * meters, kilometres, kilometers.
+	   * @returns {number} degrees
+	   */
 
-	                nAId = segment2Info.nodes[0];
-	                nBId = segment2Info.nodes[1];
-	                if (nAId === n1.id || nAId === n2.id ||
-	                    nBId === n1.id || nBId === n2.id) {
-	                    // n1 or n2 is a connection node; skip
-	                    continue;
-	                }
-	                nA = graph.hasEntity(nAId);
-	                if (!nA) { continue; }
-	                nB = graph.hasEntity(nBId);
-	                if (!nB) { continue; }
-
-	                segment1 = [n1.loc, n2.loc];
-	                segment2 = [nA.loc, nB.loc];
-	                var point = geoLineIntersection(segment1, segment2);
-	                if (point) {
-	                    edgeCrossInfos.push({
-	                        wayInfos: [
-	                            {
-	                                way: way1,
-	                                featureType: way1FeatureType,
-	                                edge: [n1.id, n2.id]
-	                            },
-	                            {
-	                                way: way2,
-	                                featureType: way2FeatureType,
-	                                edge: [nA.id, nB.id]
-	                            }
-	                        ],
-	                        crossPoint: point
-	                    });
-	                    if (oneOnly) {
-	                        checkedSingleCrossingWays[way2.id] = true;
-	                        break;
-	                    }
-	                }
-	            }
-	        }
-	        return edgeCrossInfos;
-	    }
+	  function lengthToDegrees(distance, units) {
+	    return radiansToDegrees(lengthToRadians(distance, units));
+	  }
 
+	  exports.lengthToDegrees = lengthToDegrees;
+	  /**
+	   * Converts any bearing angle from the north line direction (positive clockwise)
+	   * and returns an angle between 0-360 degrees (positive clockwise), 0 being the north line
+	   *
+	   * @name bearingToAzimuth
+	   * @param {number} bearing angle, between -180 and +180 degrees
+	   * @returns {number} angle between 0 and 360 degrees
+	   */
 
-	    function waysToCheck(entity, graph) {
-	        var featureType = getFeatureType(entity, graph);
-	        if (!featureType) { return []; }
+	  function bearingToAzimuth(bearing) {
+	    var angle = bearing % 360;
 
-	        if (entity.type === 'way') {
-	            return [entity];
-	        } else if (entity.type === 'relation') {
-	            return entity.members.reduce(function(array, member) {
-	                if (member.type === 'way' &&
-	                    // only look at geometry ways
-	                    (!member.role || member.role === 'outer' || member.role === 'inner')) {
-	                    var entity = graph.hasEntity(member.id);
-	                    // don't add duplicates
-	                    if (entity && array.indexOf(entity) === -1) {
-	                        array.push(entity);
-	                    }
-	                }
-	                return array;
-	            }, []);
-	        }
-	        return [];
+	    if (angle < 0) {
+	      angle += 360;
 	    }
 
+	    return angle;
+	  }
 
-	    var validation = function checkCrossingWays(entity, graph) {
+	  exports.bearingToAzimuth = bearingToAzimuth;
+	  /**
+	   * Converts an angle in radians to degrees
+	   *
+	   * @name radiansToDegrees
+	   * @param {number} radians angle in radians
+	   * @returns {number} degrees between 0 and 360 degrees
+	   */
 
-	        var tree = context.history().tree();
+	  function radiansToDegrees(radians) {
+	    var degrees = radians % (2 * Math.PI);
+	    return degrees * 180 / Math.PI;
+	  }
 
-	        var ways = waysToCheck(entity, graph);
+	  exports.radiansToDegrees = radiansToDegrees;
+	  /**
+	   * Converts an angle in degrees to radians
+	   *
+	   * @name degreesToRadians
+	   * @param {number} degrees angle between 0 and 360 degrees
+	   * @returns {number} angle in radians
+	   */
 
-	        var issues = [];
-	        // declare these here to reduce garbage collection
-	        var wayIndex, crossingIndex, crossings;
-	        for (wayIndex in ways) {
-	            crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
-	            for (crossingIndex in crossings) {
-	                issues.push(createIssue(crossings[crossingIndex], graph));
-	            }
-	        }
-	        return issues;
-	    };
+	  function degreesToRadians(degrees) {
+	    var radians = degrees % 360;
+	    return radians * Math.PI / 180;
+	  }
 
+	  exports.degreesToRadians = degreesToRadians;
+	  /**
+	   * Converts a length to the requested unit.
+	   * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
+	   *
+	   * @param {number} length to be converted
+	   * @param {Units} [originalUnit="kilometers"] of the length
+	   * @param {Units} [finalUnit="kilometers"] returned unit
+	   * @returns {number} the converted length
+	   */
 
-	    function createIssue(crossing, graph) {
+	  function convertLength(length, originalUnit, finalUnit) {
+	    if (originalUnit === void 0) {
+	      originalUnit = "kilometers";
+	    }
 
-	        // use the entities with the tags that define the feature type
-	        crossing.wayInfos.sort(function(way1Info, way2Info) {
-	            var type1 = way1Info.featureType;
-	            var type2 = way2Info.featureType;
-	            if (type1 === type2) {
-	                return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
-	            } else if (type1 === 'waterway') {
-	                return true;
-	            } else if (type2 === 'waterway') {
-	                return false;
-	            }
-	            return type1 < type2;
-	        });
-	        var entities = crossing.wayInfos.map(function(wayInfo) {
-	            return getFeatureWithFeatureTypeTagsForWay(wayInfo.way, graph);
-	        });
-	        var edges = [crossing.wayInfos[0].edge, crossing.wayInfos[1].edge];
-	        var featureTypes = [crossing.wayInfos[0].featureType, crossing.wayInfos[1].featureType];
+	    if (finalUnit === void 0) {
+	      finalUnit = "kilometers";
+	    }
 
-	        var connectionTags = tagsForConnectionNodeIfAllowed(entities[0], entities[1], graph);
+	    if (!(length >= 0)) {
+	      throw new Error("length must be a positive number");
+	    }
 
-	        var featureType1 = crossing.wayInfos[0].featureType;
-	        var featureType2 = crossing.wayInfos[1].featureType;
+	    return radiansToLength(lengthToRadians(length, originalUnit), finalUnit);
+	  }
 
-	        var isCrossingIndoors = taggedAsIndoor(entities[0].tags) && taggedAsIndoor(entities[1].tags);
-	        var isCrossingTunnels = allowsTunnel(featureType1) && hasTag(entities[0].tags, 'tunnel') &&
-	                                allowsTunnel(featureType2) && hasTag(entities[1].tags, 'tunnel');
-	        var isCrossingBridges = allowsBridge(featureType1) && hasTag(entities[0].tags, 'bridge') &&
-	                                allowsBridge(featureType2) && hasTag(entities[1].tags, 'bridge');
+	  exports.convertLength = convertLength;
+	  /**
+	   * Converts a area to the requested unit.
+	   * Valid units: kilometers, kilometres, meters, metres, centimetres, millimeters, acres, miles, yards, feet, inches
+	   * @param {number} area to be converted
+	   * @param {Units} [originalUnit="meters"] of the distance
+	   * @param {Units} [finalUnit="kilometers"] returned unit
+	   * @returns {number} the converted distance
+	   */
 
-	        var subtype = [featureType1, featureType2].sort().join('-');
+	  function convertArea(area, originalUnit, finalUnit) {
+	    if (originalUnit === void 0) {
+	      originalUnit = "meters";
+	    }
 
-	        var crossingTypeID = subtype;
+	    if (finalUnit === void 0) {
+	      finalUnit = "kilometers";
+	    }
 
-	        if (isCrossingIndoors) {
-	            crossingTypeID = 'indoor-indoor';
-	        } else if (isCrossingTunnels) {
-	            crossingTypeID = 'tunnel-tunnel';
-	        } else if (isCrossingBridges) {
-	            crossingTypeID = 'bridge-bridge';
-	        }
-	        if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
-	            crossingTypeID += '_connectable';
-	        }
+	    if (!(area >= 0)) {
+	      throw new Error("area must be a positive number");
+	    }
 
-	        return new validationIssue({
-	            type: type,
-	            subtype: subtype,
-	            severity: 'warning',
-	            message: function(context) {
-	                var graph = context.graph();
-	                var entity1 = graph.hasEntity(this.entityIds[0]),
-	                    entity2 = graph.hasEntity(this.entityIds[1]);
-	                return (entity1 && entity2) ? _t('issues.crossing_ways.message', {
-	                    feature: utilDisplayLabel(entity1, graph),
-	                    feature2: utilDisplayLabel(entity2, graph)
-	                }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: entities.map(function(entity) {
-	                return entity.id;
-	            }),
-	            data: {
-	                edges: edges,
-	                featureTypes: featureTypes,
-	                connectionTags: connectionTags
-	            },
-	            // differentiate based on the loc since two ways can cross multiple times
-	            hash: crossing.crossPoint.toString() +
-	                // if the edges change then so does the fix
-	                edges.slice().sort(function(edge1, edge2) {
-	                    // order to assure hash is deterministic
-	                    return edge1[0] < edge2[0] ? -1 : 1;
-	                }).toString() +
-	                // ensure the correct connection tags are added in the fix
-	                JSON.stringify(connectionTags),
-	            loc: crossing.crossPoint,
-	            dynamicFixes: function(context) {
-	                var mode = context.mode();
-	                if (!mode || mode.id !== 'select' || mode.selectedIDs().length !== 1) { return []; }
-
-	                var selectedIndex = this.entityIds[0] === mode.selectedIDs()[0] ? 0 : 1;
-	                var selectedFeatureType = this.data.featureTypes[selectedIndex];
-	                var otherFeatureType = this.data.featureTypes[selectedIndex === 0 ? 1 : 0];
-
-	                var fixes = [];
-
-	                if (connectionTags) {
-	                    fixes.push(makeConnectWaysFix(this.data.connectionTags));
-	                }
+	    var startFactor = exports.areaFactors[originalUnit];
 
-	                if (isCrossingIndoors) {
-	                    fixes.push(new validationIssueFix({
-	                        icon: 'iD-icon-layers',
-	                        title: _t('issues.fix.use_different_levels.title')
-	                    }));
-	                } else if (isCrossingTunnels ||
-	                    isCrossingBridges ||
-	                    featureType1 === 'building' ||
-	                    featureType2 === 'building')  {
-
-	                    fixes.push(makeChangeLayerFix('higher'));
-	                    fixes.push(makeChangeLayerFix('lower'));
-
-	                // can only add bridge/tunnel if both features are lines
-	                } else if (context.graph().geometry(this.entityIds[0]) === 'line' &&
-	                    context.graph().geometry(this.entityIds[1]) === 'line') {
-
-	                    // don't recommend adding bridges to waterways since they're uncommmon
-	                    if (allowsBridge(selectedFeatureType) && selectedFeatureType !== 'waterway') {
-	                        fixes.push(makeAddBridgeOrTunnelFix('add_a_bridge', 'temaki-bridge', 'bridge'));
-	                    }
+	    if (!startFactor) {
+	      throw new Error("invalid original units");
+	    }
 
-	                    // don't recommend adding tunnels under waterways since they're uncommmon
-	                    var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
-	                    if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
-	                        fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
-	                    }
-	                }
+	    var finalFactor = exports.areaFactors[finalUnit];
 
-	                // repositioning the features is always an option
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-operation-move',
-	                    title: _t('issues.fix.reposition_features.title')
-	                }));
+	    if (!finalFactor) {
+	      throw new Error("invalid final units");
+	    }
 
-	                return fixes;
-	            }
-	        });
+	    return area / startFactor * finalFactor;
+	  }
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.crossing_ways.' + crossingTypeID + '.reference'));
-	        }
-	    }
+	  exports.convertArea = convertArea;
+	  /**
+	   * isNumber
+	   *
+	   * @param {*} num Number to validate
+	   * @returns {boolean} true/false
+	   * @example
+	   * turf.isNumber(123)
+	   * //=true
+	   * turf.isNumber('foo')
+	   * //=false
+	   */
 
-	    function makeAddBridgeOrTunnelFix(fixTitleID, iconName, bridgeOrTunnel){
-	        return new validationIssueFix({
-	            icon: iconName,
-	            title: _t('issues.fix.' + fixTitleID + '.title'),
-	            onClick: function(context) {
-	                var mode = context.mode();
-	                if (!mode || mode.id !== 'select') { return; }
-
-	                var selectedIDs = mode.selectedIDs();
-	                if (selectedIDs.length !== 1) { return; }
-
-	                var selectedWayID = selectedIDs[0];
-	                if (!context.hasEntity(selectedWayID)) { return; }
-
-	                var resultWayIDs = [selectedWayID];
-
-	                var edge, crossedEdge, crossedWayID;
-	                if (this.issue.entityIds[0] === selectedWayID) {
-	                    edge = this.issue.data.edges[0];
-	                    crossedEdge = this.issue.data.edges[1];
-	                    crossedWayID = this.issue.entityIds[1];
-	                } else {
-	                    edge = this.issue.data.edges[1];
-	                    crossedEdge = this.issue.data.edges[0];
-	                    crossedWayID = this.issue.entityIds[0];
-	                }
+	  function isNumber(num) {
+	    return !isNaN(num) && num !== null && !Array.isArray(num) && !/^\s*$/.test(num);
+	  }
 
-	                var crossingLoc = this.issue.loc;
+	  exports.isNumber = isNumber;
+	  /**
+	   * isObject
+	   *
+	   * @param {*} input variable to validate
+	   * @returns {boolean} true/false
+	   * @example
+	   * turf.isObject({elevation: 10})
+	   * //=true
+	   * turf.isObject('foo')
+	   * //=false
+	   */
 
-	                var projection = context.projection;
+	  function isObject(input) {
+	    return !!input && input.constructor === Object;
+	  }
 
-	                var action = function actionAddStructure(graph) {
+	  exports.isObject = isObject;
+	  /**
+	   * Validate BBox
+	   *
+	   * @private
+	   * @param {Array<number>} bbox BBox to validate
+	   * @returns {void}
+	   * @throws Error if BBox is not valid
+	   * @example
+	   * validateBBox([-180, -40, 110, 50])
+	   * //=OK
+	   * validateBBox([-180, -40])
+	   * //=Error
+	   * validateBBox('Foo')
+	   * //=Error
+	   * validateBBox(5)
+	   * //=Error
+	   * validateBBox(null)
+	   * //=Error
+	   * validateBBox(undefined)
+	   * //=Error
+	   */
 
-	                    var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+	  function validateBBox(bbox) {
+	    if (!bbox) {
+	      throw new Error("bbox is required");
+	    }
 
-	                    var crossedWay = graph.hasEntity(crossedWayID);
-	                    // use the explicit width of the crossed feature as the structure length, if available
-	                    var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
-	                    if (!structLengthMeters) {
-	                        // if no explicit width is set, approximate the width based on the tags
-	                        structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
-	                    }
-	                    if (structLengthMeters) {
-	                        if (getFeatureType(crossedWay, graph) === 'railway') {
-	                            // bridges over railways are generally much longer than the rail bed itself, compensate
-	                            structLengthMeters *= 2;
-	                        }
-	                    } else {
-	                        // should ideally never land here since all rail/water/road tags should have an implied width
-	                        structLengthMeters = 8;
-	                    }
+	    if (!Array.isArray(bbox)) {
+	      throw new Error("bbox must be an Array");
+	    }
 
-	                    var a1 = geoAngle(edgeNodes[0], edgeNodes[1], projection) + Math.PI;
-	                    var a2 = geoAngle(graph.entity(crossedEdge[0]), graph.entity(crossedEdge[1]), projection) + Math.PI;
-	                    var crossingAngle = Math.max(a1, a2) - Math.min(a1, a2);
-	                    if (crossingAngle > Math.PI) { crossingAngle -= Math.PI; }
-	                    // lengthen the structure to account for the angle of the crossing
-	                    structLengthMeters = ((structLengthMeters / 2) / Math.sin(crossingAngle)) * 2;
+	    if (bbox.length !== 4 && bbox.length !== 6) {
+	      throw new Error("bbox must be an Array of 4 or 6 numbers");
+	    }
 
-	                    // add padding since the structure must extend past the edges of the crossed feature
-	                    structLengthMeters += 4;
+	    bbox.forEach(function (num) {
+	      if (!isNumber(num)) {
+	        throw new Error("bbox must only contain numbers");
+	      }
+	    });
+	  }
 
-	                    // clamp the length to a reasonable range
-	                    structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
+	  exports.validateBBox = validateBBox;
+	  /**
+	   * Validate Id
+	   *
+	   * @private
+	   * @param {string|number} id Id to validate
+	   * @returns {void}
+	   * @throws Error if Id is not valid
+	   * @example
+	   * validateId([-180, -40, 110, 50])
+	   * //=Error
+	   * validateId([-180, -40])
+	   * //=Error
+	   * validateId('Foo')
+	   * //=OK
+	   * validateId(5)
+	   * //=OK
+	   * validateId(null)
+	   * //=Error
+	   * validateId(undefined)
+	   * //=Error
+	   */
 
-	                    function geomToProj(geoPoint) {
-	                        return [
-	                            geoLonToMeters(geoPoint[0], geoPoint[1]),
-	                            geoLatToMeters(geoPoint[1])
-	                        ];
-	                    }
-	                    function projToGeom(projPoint) {
-	                        var lat = geoMetersToLat(projPoint[1]);
-	                        return [
-	                            geoMetersToLon(projPoint[0], lat),
-	                            lat
-	                        ];
-	                    }
+	  function validateId(id) {
+	    if (!id) {
+	      throw new Error("id is required");
+	    }
 
-	                    var projEdgeNode1 = geomToProj(edgeNodes[0].loc);
-	                    var projEdgeNode2 = geomToProj(edgeNodes[1].loc);
+	    if (["string", "number"].indexOf(_typeof(id)) === -1) {
+	      throw new Error("id must be a number or a string");
+	    }
+	  }
 
-	                    var projectedAngle = geoVecAngle(projEdgeNode1, projEdgeNode2);
+	  exports.validateId = validateId; // Deprecated methods
 
-	                    var projectedCrossingLoc = geomToProj(crossingLoc);
-	                    var linearToSphericalMetersRatio = geoVecLength(projEdgeNode1, projEdgeNode2) /
-	                        geoSphericalDistance(edgeNodes[0].loc, edgeNodes[1].loc);
+	  function radians2degrees() {
+	    throw new Error("method has been renamed to `radiansToDegrees`");
+	  }
 
-	                    function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
-	                        var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
-	                        return projToGeom([
-	                            projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters,
-	                            projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters
-	                        ]);
-	                    }
+	  exports.radians2degrees = radians2degrees;
 
-	                    var endpointLocGetter1 = function(lengthMeters) {
-	                        return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
-	                    };
-	                    var endpointLocGetter2 = function(lengthMeters) {
-	                        return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
-	                    };
-
-	                    // avoid creating very short edges from splitting too close to another node
-	                    var minEdgeLengthMeters = 0.55;
-
-	                    // decide where to bound the structure along the way, splitting as necessary
-	                    function determineEndpoint(edge, endNode, locGetter) {
-	                        var newNode;
-
-	                        var idealLengthMeters = structLengthMeters / 2;
-
-	                        // distance between the crossing location and the end of the edge,
-	                        // the maximum length of this side of the structure
-	                        var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
-
-	                        if (crossingToEdgeEndDistance - idealLengthMeters > minEdgeLengthMeters) {
-	                            // the edge is long enough to insert a new node
-
-	                            // the loc that would result in the full expected length
-	                            var idealNodeLoc = locGetter(idealLengthMeters);
-
-	                            newNode = osmNode();
-	                            graph = actionAddMidpoint({ loc: idealNodeLoc, edge: edge }, newNode)(graph);
-
-	                        } else {
-	                            var edgeCount = 0;
-	                            endNode.parentIntersectionWays(graph).forEach(function(way) {
-	                                way.nodes.forEach(function(nodeID) {
-	                                    if (nodeID === endNode.id) {
-	                                        if ((endNode.id === way.first() && endNode.id !== way.last()) ||
-	                                            (endNode.id === way.last() && endNode.id !== way.first())) {
-	                                            edgeCount += 1;
-	                                        } else {
-	                                            edgeCount += 2;
-	                                        }
-	                                    }
-	                                });
-	                            });
-
-	                            if (edgeCount >= 3) {
-	                                // the end node is a junction, try to leave a segment
-	                                // between it and the structure - #7202
-
-	                                var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
-	                                if (insetLength > minEdgeLengthMeters) {
-	                                    var insetNodeLoc = locGetter(insetLength);
-	                                    newNode = osmNode();
-	                                    graph = actionAddMidpoint({ loc: insetNodeLoc, edge: edge }, newNode)(graph);
-	                                }
-	                            }
-	                        }
-
-	                        // if the edge is too short to subdivide as desired, then
-	                        // just bound the structure at the existing end node
-	                        if (!newNode) { newNode = endNode; }
-
-	                        var splitAction = actionSplit(newNode.id)
-	                            .limitWays(resultWayIDs); // only split selected or created ways
-
-	                        // do the split
-	                        graph = splitAction(graph);
-	                        if (splitAction.getCreatedWayIDs().length) {
-	                            resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
-	                        }
-
-	                        return newNode;
-	                    }
+	  function degrees2radians() {
+	    throw new Error("method has been renamed to `degreesToRadians`");
+	  }
 
-	                    var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
-	                    var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
+	  exports.degrees2radians = degrees2radians;
 
-	                    var structureWay = resultWayIDs.map(function(id) {
-	                        return graph.entity(id);
-	                    }).find(function(way) {
-	                        return way.nodes.indexOf(structEndNode1.id) !== -1 &&
-	                            way.nodes.indexOf(structEndNode2.id) !== -1;
-	                    });
+	  function distanceToDegrees() {
+	    throw new Error("method has been renamed to `lengthToDegrees`");
+	  }
 
-	                    var tags = Object.assign({}, structureWay.tags); // copy tags
-	                    if (bridgeOrTunnel === 'bridge'){
-	                        tags.bridge = 'yes';
-	                        tags.layer = '1';
-	                    } else {
-	                        var tunnelValue = 'yes';
-	                        if (getFeatureType(structureWay, graph) === 'waterway') {
-	                            // use `tunnel=culvert` for waterways by default
-	                            tunnelValue = 'culvert';
-	                        }
-	                        tags.tunnel = tunnelValue;
-	                        tags.layer = '-1';
-	                    }
-	                    // apply the structure tags to the way
-	                    graph = actionChangeTags(structureWay.id, tags)(graph);
-	                    return graph;
-	                };
+	  exports.distanceToDegrees = distanceToDegrees;
 
-	                context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
-	                context.enter(modeSelect(context, resultWayIDs));
-	            }
-	        });
-	    }
+	  function distanceToRadians() {
+	    throw new Error("method has been renamed to `lengthToRadians`");
+	  }
 
-	    function makeConnectWaysFix(connectionTags) {
+	  exports.distanceToRadians = distanceToRadians;
 
-	        var fixTitleID = 'connect_features';
-	        if (connectionTags.ford) {
-	            fixTitleID = 'connect_using_ford';
-	        }
+	  function radiansToDistance() {
+	    throw new Error("method has been renamed to `radiansToLength`");
+	  }
 
-	        return new validationIssueFix({
-	            icon: 'iD-icon-crossing',
-	            title: _t('issues.fix.' + fixTitleID + '.title'),
-	            onClick: function(context) {
-	                var loc = this.issue.loc;
-	                var connectionTags = this.issue.data.connectionTags;
-	                var edges = this.issue.data.edges;
+	  exports.radiansToDistance = radiansToDistance;
 
-	                context.perform(
-	                    function actionConnectCrossingWays(graph) {
-	                        // create the new node for the points
-	                        var node = osmNode({ loc: loc, tags: connectionTags });
-	                        graph = graph.replace(node);
-
-	                        var nodesToMerge = [node.id];
-	                        var mergeThresholdInMeters = 0.75;
-
-	                        edges.forEach(function(edge) {
-	                            var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
-	                            var closestNodeInfo = geoSphericalClosestNode(edgeNodes, loc);
-	                            // if there is already a point nearby, use that
-	                            if (closestNodeInfo.distance < mergeThresholdInMeters) {
-	                                nodesToMerge.push(closestNodeInfo.node.id);
-	                            // else add the new node to the way
-	                            } else {
-	                                graph = actionAddMidpoint({loc: loc, edge: edge}, node)(graph);
-	                            }
-	                        });
-
-	                        if (nodesToMerge.length > 1) {
-	                            // if we're using nearby nodes, merge them with the new node
-	                            graph = actionMergeNodes(nodesToMerge, loc)(graph);
-	                        }
-
-	                        return graph;
-	                    },
-	                    _t('issues.fix.connect_crossing_features.annotation')
-	                );
-	            }
-	        });
-	    }
+	  function bearingToAngle() {
+	    throw new Error("method has been renamed to `bearingToAzimuth`");
+	  }
 
-	    function makeChangeLayerFix(higherOrLower) {
-	        return new validationIssueFix({
-	            icon: 'iD-icon-' + (higherOrLower === 'higher' ? 'up' : 'down'),
-	            title: _t('issues.fix.tag_this_as_' + higherOrLower + '.title'),
-	            onClick: function(context) {
+	  exports.bearingToAngle = bearingToAngle;
 
-	                var mode = context.mode();
-	                if (!mode || mode.id !== 'select') { return; }
+	  function convertDistance() {
+	    throw new Error("method has been renamed to `convertLength`");
+	  }
 
-	                var selectedIDs = mode.selectedIDs();
-	                if (selectedIDs.length !== 1) { return; }
+	  exports.convertDistance = convertDistance;
+	});
 
-	                var selectedID = selectedIDs[0];
-	                if (!this.issue.entityIds.some(function(entityId) {
-	                    return entityId === selectedID;
-	                })) { return; }
+	var invariant = createCommonjsModule(function (module, exports) {
 
-	                var entity = context.hasEntity(selectedID);
-	                if (!entity) { return; }
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
+	  /**
+	   * Unwrap a coordinate from a Point Feature, Geometry or a single coordinate.
+	   *
+	   * @name getCoord
+	   * @param {Array<number>|Geometry<Point>|Feature<Point>} coord GeoJSON Point or an Array of numbers
+	   * @returns {Array<number>} coordinates
+	   * @example
+	   * var pt = turf.point([10, 10]);
+	   *
+	   * var coord = turf.getCoord(pt);
+	   * //= [10, 10]
+	   */
 
-	                var tags = Object.assign({}, entity.tags);   // shallow copy
-	                var layer = tags.layer && Number(tags.layer);
-	                if (layer && !isNaN(layer)) {
-	                    if (higherOrLower === 'higher') {
-	                        layer += 1;
-	                    } else {
-	                        layer -= 1;
-	                    }
-	                } else {
-	                    if (higherOrLower === 'higher') {
-	                        layer = 1;
-	                    } else {
-	                        layer = -1;
-	                    }
-	                }
-	                tags.layer = layer.toString();
-	                context.perform(
-	                    actionChangeTags(entity.id, tags),
-	                    _t('operations.change_tags.annotation')
-	                );
-	            }
-	        });
+	  function getCoord(coord) {
+	    if (!coord) {
+	      throw new Error("coord is required");
 	    }
 
-	    validation.type = type;
-
-	    return validation;
-	}
+	    if (!Array.isArray(coord)) {
+	      if (coord.type === "Feature" && coord.geometry !== null && coord.geometry.type === "Point") {
+	        return coord.geometry.coordinates;
+	      }
 
-	function validationDisconnectedWay() {
-	    var type = 'disconnected_way';
+	      if (coord.type === "Point") {
+	        return coord.coordinates;
+	      }
+	    }
 
-	    function isTaggedAsHighway(entity) {
-	        return osmRoutableHighwayTagValues[entity.tags.highway];
+	    if (Array.isArray(coord) && coord.length >= 2 && !Array.isArray(coord[0]) && !Array.isArray(coord[1])) {
+	      return coord;
 	    }
 
-	    var validation = function checkDisconnectedWay(entity, graph) {
+	    throw new Error("coord must be GeoJSON Point or an Array of numbers");
+	  }
 
-	        var routingIslandWays = routingIslandForEntity(entity);
-	        if (!routingIslandWays) { return []; }
+	  exports.getCoord = getCoord;
+	  /**
+	   * Unwrap coordinates from a Feature, Geometry Object or an Array
+	   *
+	   * @name getCoords
+	   * @param {Array<any>|Geometry|Feature} coords Feature, Geometry Object or an Array
+	   * @returns {Array<any>} coordinates
+	   * @example
+	   * var poly = turf.polygon([[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]);
+	   *
+	   * var coords = turf.getCoords(poly);
+	   * //= [[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]
+	   */
 
-	        return [new validationIssue({
-	            type: type,
-	            subtype: 'highway',
-	            severity: 'warning',
-	            message: function(context) {
-	                if (this.entityIds.length === 1) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.disconnected_way.highway.message', { highway: utilDisplayLabel(entity, context.graph()) }) : '';
-	                }
-	                return _t('issues.disconnected_way.routable.message.multiple', { count: this.entityIds.length.toString() });
-	            },
-	            reference: showReference,
-	            entityIds: Array.from(routingIslandWays).map(function(way) { return way.id; }),
-	            dynamicFixes: makeFixes
-	        })];
+	  function getCoords(coords) {
+	    if (Array.isArray(coords)) {
+	      return coords;
+	    } // Feature
 
 
-	        function makeFixes(context) {
+	    if (coords.type === "Feature") {
+	      if (coords.geometry !== null) {
+	        return coords.geometry.coordinates;
+	      }
+	    } else {
+	      // Geometry
+	      if (coords.coordinates) {
+	        return coords.coordinates;
+	      }
+	    }
 
-	            var fixes = [];
+	    throw new Error("coords must be GeoJSON Feature, Geometry Object or an Array");
+	  }
 
-	            var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
+	  exports.getCoords = getCoords;
+	  /**
+	   * Checks if coordinates contains a number
+	   *
+	   * @name containsNumber
+	   * @param {Array<any>} coordinates GeoJSON Coordinates
+	   * @returns {boolean} true if Array contains a number
+	   */
 
-	            if (singleEntity) {
+	  function containsNumber(coordinates) {
+	    if (coordinates.length > 1 && helpers$1.isNumber(coordinates[0]) && helpers$1.isNumber(coordinates[1])) {
+	      return true;
+	    }
 
-	                if (singleEntity.type === 'way' && !singleEntity.isClosed()) {
+	    if (Array.isArray(coordinates[0]) && coordinates[0].length) {
+	      return containsNumber(coordinates[0]);
+	    }
 
-	                    var textDirection = _mainLocalizer.textDirection();
+	    throw new Error("coordinates must only contain numbers");
+	  }
 
-	                    var startFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.first(), 'start');
-	                    if (startFix) { fixes.push(startFix); }
+	  exports.containsNumber = containsNumber;
+	  /**
+	   * Enforce expectations about types of GeoJSON objects for Turf.
+	   *
+	   * @name geojsonType
+	   * @param {GeoJSON} value any GeoJSON object
+	   * @param {string} type expected GeoJSON type
+	   * @param {string} name name of calling function
+	   * @throws {Error} if value is not the expected type.
+	   */
 
-	                    var endFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.last(), 'end');
-	                    if (endFix) { fixes.push(endFix); }
-	                }
-	                if (!fixes.length) {
-	                    fixes.push(new validationIssueFix({
-	                        title: _t('issues.fix.connect_feature.title')
-	                    }));
-	                }
+	  function geojsonType(value, type, name) {
+	    if (!type || !name) {
+	      throw new Error("type and name required");
+	    }
 
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-operation-delete',
-	                    title: _t('issues.fix.delete_feature.title'),
-	                    entityIds: [singleEntity.id],
-	                    onClick: function(context) {
-	                        var id = this.issue.entityIds[0];
-	                        var operation = operationDelete(context, [id]);
-	                        if (!operation.disabled()) {
-	                            operation();
-	                        }
-	                    }
-	                }));
-	            } else {
-	                fixes.push(new validationIssueFix({
-	                    title: _t('issues.fix.connect_features.title')
-	                }));
-	            }
+	    if (!value || value.type !== type) {
+	      throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + value.type);
+	    }
+	  }
 
-	            return fixes;
-	        }
+	  exports.geojsonType = geojsonType;
+	  /**
+	   * Enforce expectations about types of {@link Feature} inputs for Turf.
+	   * Internally this uses {@link geojsonType} to judge geometry types.
+	   *
+	   * @name featureOf
+	   * @param {Feature} feature a feature with an expected geometry type
+	   * @param {string} type expected GeoJSON type
+	   * @param {string} name name of calling function
+	   * @throws {Error} error if value is not the expected type.
+	   */
 
+	  function featureOf(feature, type, name) {
+	    if (!feature) {
+	      throw new Error("No feature passed");
+	    }
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.disconnected_way.routable.reference'));
-	        }
+	    if (!name) {
+	      throw new Error(".featureOf() requires a name");
+	    }
 
-	        function routingIslandForEntity(entity) {
+	    if (!feature || feature.type !== "Feature" || !feature.geometry) {
+	      throw new Error("Invalid input to " + name + ", Feature with geometry required");
+	    }
 
-	            var routingIsland = new Set();  // the interconnected routable features
-	            var waysToCheck = [];           // the queue of remaining routable ways to traverse
+	    if (!feature.geometry || feature.geometry.type !== type) {
+	      throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
+	    }
+	  }
 
-	            function queueParentWays(node) {
-	                graph.parentWays(node).forEach(function(parentWay) {
-	                    if (!routingIsland.has(parentWay) &&    // only check each feature once
-	                        isRoutableWay(parentWay, false)) {  // only check routable features
-	                        routingIsland.add(parentWay);
-	                        waysToCheck.push(parentWay);
-	                    }
-	                });
-	            }
+	  exports.featureOf = featureOf;
+	  /**
+	   * Enforce expectations about types of {@link FeatureCollection} inputs for Turf.
+	   * Internally this uses {@link geojsonType} to judge geometry types.
+	   *
+	   * @name collectionOf
+	   * @param {FeatureCollection} featureCollection a FeatureCollection for which features will be judged
+	   * @param {string} type expected GeoJSON type
+	   * @param {string} name name of calling function
+	   * @throws {Error} if value is not the expected type.
+	   */
 
-	            if (entity.type === 'way' && isRoutableWay(entity, true)) {
+	  function collectionOf(featureCollection, type, name) {
+	    if (!featureCollection) {
+	      throw new Error("No featureCollection passed");
+	    }
 
-	                routingIsland.add(entity);
-	                waysToCheck.push(entity);
+	    if (!name) {
+	      throw new Error(".collectionOf() requires a name");
+	    }
 
-	            } else if (entity.type === 'node' && isRoutableNode(entity)) {
+	    if (!featureCollection || featureCollection.type !== "FeatureCollection") {
+	      throw new Error("Invalid input to " + name + ", FeatureCollection required");
+	    }
 
-	                routingIsland.add(entity);
-	                queueParentWays(entity);
+	    for (var _i = 0, _a = featureCollection.features; _i < _a.length; _i++) {
+	      var feature = _a[_i];
 
-	            } else {
-	                // this feature isn't routable, cannot be a routing island
-	                return null;
-	            }
+	      if (!feature || feature.type !== "Feature" || !feature.geometry) {
+	        throw new Error("Invalid input to " + name + ", Feature with geometry required");
+	      }
 
-	            while (waysToCheck.length) {
-	                var wayToCheck = waysToCheck.pop();
-	                var childNodes = graph.childNodes(wayToCheck);
-	                for (var i in childNodes) {
-	                    var vertex = childNodes[i];
+	      if (!feature.geometry || feature.geometry.type !== type) {
+	        throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
+	      }
+	    }
+	  }
 
-	                    if (isConnectedVertex(vertex)) {
-	                        // found a link to the wider network, not a routing island
-	                        return null;
-	                    }
+	  exports.collectionOf = collectionOf;
+	  /**
+	   * Get Geometry from Feature or Geometry Object
+	   *
+	   * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
+	   * @returns {Geometry|null} GeoJSON Geometry Object
+	   * @throws {Error} if geojson is not a Feature or Geometry Object
+	   * @example
+	   * var point = {
+	   *   "type": "Feature",
+	   *   "properties": {},
+	   *   "geometry": {
+	   *     "type": "Point",
+	   *     "coordinates": [110, 40]
+	   *   }
+	   * }
+	   * var geom = turf.getGeom(point)
+	   * //={"type": "Point", "coordinates": [110, 40]}
+	   */
 
-	                    if (isRoutableNode(vertex)) {
-	                        routingIsland.add(vertex);
-	                    }
+	  function getGeom(geojson) {
+	    if (geojson.type === "Feature") {
+	      return geojson.geometry;
+	    }
 
-	                    queueParentWays(vertex);
-	                }
-	            }
+	    return geojson;
+	  }
 
-	            // no network link found, this is a routing island, return its members
-	            return routingIsland;
-	        }
+	  exports.getGeom = getGeom;
+	  /**
+	   * Get GeoJSON object's type, Geometry type is prioritize.
+	   *
+	   * @param {GeoJSON} geojson GeoJSON object
+	   * @param {string} [name="geojson"] name of the variable to display in error message
+	   * @returns {string} GeoJSON type
+	   * @example
+	   * var point = {
+	   *   "type": "Feature",
+	   *   "properties": {},
+	   *   "geometry": {
+	   *     "type": "Point",
+	   *     "coordinates": [110, 40]
+	   *   }
+	   * }
+	   * var geom = turf.getType(point)
+	   * //="Point"
+	   */
 
-	        function isConnectedVertex(vertex) {
-	            // assume ways overlapping unloaded tiles are connected to the wider road network  - #5938
-	            var osm = services.osm;
-	            if (osm && !osm.isDataLoaded(vertex.loc)) { return true; }
+	  function getType(geojson, name) {
+	    if (geojson.type === "FeatureCollection") {
+	      return "FeatureCollection";
+	    }
 
-	            // entrances are considered connected
-	            if (vertex.tags.entrance &&
-	                vertex.tags.entrance !== 'no') { return true; }
-	            if (vertex.tags.amenity === 'parking_entrance') { return true; }
+	    if (geojson.type === "GeometryCollection") {
+	      return "GeometryCollection";
+	    }
 
-	            return false;
-	        }
+	    if (geojson.type === "Feature" && geojson.geometry !== null) {
+	      return geojson.geometry.type;
+	    }
 
-	        function isRoutableNode(node) {
-	            // treat elevators as distinct features in the highway network
-	            if (node.tags.highway === 'elevator') { return true; }
-	            return false;
-	        }
+	    return geojson.type;
+	  }
 
-	        function isRoutableWay(way, ignoreInnerWays) {
-	            if (isTaggedAsHighway(way) || way.tags.route === 'ferry') { return true; }
+	  exports.getType = getType;
+	});
 
-	            return graph.parentRelations(way).some(function(parentRelation) {
-	                if (parentRelation.tags.type === 'route' &&
-	                    parentRelation.tags.route === 'ferry') { return true; }
+	var lineclip_1 = lineclip;
+	var _default = lineclip;
+	lineclip.polyline = lineclip;
+	lineclip.polygon = polygonclip; // Cohen-Sutherland line clippign algorithm, adapted to efficiently
+	// handle polylines rather than just segments
 
-	                if (parentRelation.isMultipolygon() &&
-	                    isTaggedAsHighway(parentRelation) &&
-	                    (!ignoreInnerWays || parentRelation.memberById(way.id).role !== 'inner')) { return true; }
-	            });
+	function lineclip(points, bbox, result) {
+	  var len = points.length,
+	      codeA = bitCode(points[0], bbox),
+	      part = [],
+	      i,
+	      a,
+	      b,
+	      codeB,
+	      lastCode;
+	  if (!result) result = [];
+
+	  for (i = 1; i < len; i++) {
+	    a = points[i - 1];
+	    b = points[i];
+	    codeB = lastCode = bitCode(b, bbox);
+
+	    while (true) {
+	      if (!(codeA | codeB)) {
+	        // accept
+	        part.push(a);
+
+	        if (codeB !== lastCode) {
+	          // segment went outside
+	          part.push(b);
+
+	          if (i < len - 1) {
+	            // start a new line
+	            result.push(part);
+	            part = [];
+	          }
+	        } else if (i === len - 1) {
+	          part.push(b);
 	        }
 
-	        function makeContinueDrawingFixIfAllowed(textDirection, vertexID, whichEnd) {
-	            var vertex = graph.hasEntity(vertexID);
-	            if (!vertex || vertex.tags.noexit === 'yes') { return null; }
+	        break;
+	      } else if (codeA & codeB) {
+	        // trivial reject
+	        break;
+	      } else if (codeA) {
+	        // a outside, intersect with clip edge
+	        a = intersect(a, b, codeA, bbox);
+	        codeA = bitCode(a, bbox);
+	      } else {
+	        // b outside
+	        b = intersect(a, b, codeB, bbox);
+	        codeB = bitCode(b, bbox);
+	      }
+	    }
 
-	            var useLeftContinue = (whichEnd === 'start' && textDirection === 'ltr') ||
-	                (whichEnd === 'end' && textDirection === 'rtl');
+	    codeA = lastCode;
+	  }
 
-	            return new validationIssueFix({
-	                icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
-	                title: _t('issues.fix.continue_from_' + whichEnd + '.title'),
-	                entityIds: [vertexID],
-	                onClick: function(context) {
-	                    var wayId = this.issue.entityIds[0];
-	                    var way = context.hasEntity(wayId);
-	                    var vertexId = this.entityIds[0];
-	                    var vertex = context.hasEntity(vertexId);
+	  if (part.length) result.push(part);
+	  return result;
+	} // Sutherland-Hodgeman polygon clipping algorithm
 
-	                    if (!way || !vertex) { return; }
 
-	                    // make sure the vertex is actually visible and editable
-	                    var map = context.map();
-	                    if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-	                        map.zoomToEase(vertex);
-	                    }
+	function polygonclip(points, bbox) {
+	  var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
-	                    context.enter(
-	                        modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true)
-	                    );
-	                }
-	            });
-	        }
+	  for (edge = 1; edge <= 8; edge *= 2) {
+	    result = [];
+	    prev = points[points.length - 1];
+	    prevInside = !(bitCode(prev, bbox) & edge);
 
-	    };
+	    for (i = 0; i < points.length; i++) {
+	      p = points[i];
+	      inside = !(bitCode(p, bbox) & edge); // if segment goes through the clip window, add an intersection
 
-	    validation.type = type;
+	      if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
+	      if (inside) result.push(p); // add a point if it's inside
 
-	    return validation;
-	}
+	      prev = p;
+	      prevInside = inside;
+	    }
 
-	function validationFormatting() {
-	    var type = 'invalid_format';
+	    points = result;
+	    if (!points.length) break;
+	  }
 
-	    var validation = function(entity) {
-	        var issues = [];
+	  return result;
+	} // intersect a segment against one of the 4 lines that make up the bbox
 
-	        function isValidEmail(email) {
-	            // Emails in OSM are going to be official so they should be pretty simple
-	            // Using negated lists to better support all possible unicode characters (#6494)
-	            var valid_email = /^[^\(\)\\,":;<>@\[\]]+@[^\(\)\\,":;<>@\[\]\.]+(?:\.[a-z0-9-]+)*$/i;
 
-	            // An empty value is also acceptable
-	            return (!email || valid_email.test(email));
-	        }
-	        /*
-	        function isSchemePresent(url) {
-	            var valid_scheme = /^https?:\/\//i;
-	            return (!url || valid_scheme.test(url));
-	        }
-	        */
-	        function showReferenceEmail(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.invalid_format.email.reference'));
-	        }
-	        /*
-	        function showReferenceWebsite(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(t('issues.invalid_format.website.reference'));
-	        }
-
-	        if (entity.tags.website) {
-	            // Multiple websites are possible
-	            // If ever we support ES6, arrow functions make this nicer
-	            var websites = entity.tags.website
-	                .split(';')
-	                .map(function(s) { return s.trim(); })
-	                .filter(function(x) { return !isSchemePresent(x); });
-
-	            if (websites.length) {
-	                issues.push(new validationIssue({
-	                    type: type,
-	                    subtype: 'website',
-	                    severity: 'warning',
-	                    message: function(context) {
-	                        var entity = context.hasEntity(this.entityIds[0]);
-	                        return entity ? t('issues.invalid_format.website.message' + this.data,
-	                            { feature: utilDisplayLabel(entity, context.graph()), site: websites.join(', ') }) : '';
-	                    },
-	                    reference: showReferenceWebsite,
-	                    entityIds: [entity.id],
-	                    hash: websites.join(),
-	                    data: (websites.length > 1) ? '_multi' : ''
-	                }));
-	            }
-	        }
-	        */
-	        if (entity.tags.email) {
-	            // Multiple emails are possible
-	            var emails = entity.tags.email
-	                .split(';')
-	                .map(function(s) { return s.trim(); })
-	                .filter(function(x) { return !isValidEmail(x); });
-
-	            if (emails.length) {
-	                issues.push(new validationIssue({
-	                    type: type,
-	                    subtype: 'email',
-	                    severity: 'warning',
-	                    message: function(context) {
-	                        var entity = context.hasEntity(this.entityIds[0]);
-	                        return entity ? _t('issues.invalid_format.email.message' + this.data,
-	                            { feature: utilDisplayLabel(entity, context.graph()), email: emails.join(', ') }) : '';
-	                    },
-	                    reference: showReferenceEmail,
-	                    entityIds: [entity.id],
-	                    hash: emails.join(),
-	                    data: (emails.length > 1) ? '_multi' : ''
-	                }));
-	            }
-	        }
+	function intersect(a, b, edge, bbox) {
+	  return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
+	  edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
+	  edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
+	  edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
+	  null;
+	} // bit code reflects the point position relative to the bbox:
+	//         left  mid  right
+	//    top  1001  1000  1010
+	//    mid  0001  0000  0010
+	// bottom  0101  0100  0110
 
-	        return issues;
-	    };
 
-	    validation.type = type;
+	function bitCode(p, bbox) {
+	  var code = 0;
+	  if (p[0] < bbox[0]) code |= 1; // left
+	  else if (p[0] > bbox[2]) code |= 2; // right
+
+	  if (p[1] < bbox[1]) code |= 4; // bottom
+	  else if (p[1] > bbox[3]) code |= 8; // top
 
-	    return validation;
+	  return code;
 	}
+	lineclip_1["default"] = _default;
 
-	function validationHelpRequest(context) {
-	    var type = 'help_request';
+	var bboxClip_1 = createCommonjsModule(function (module, exports) {
 
-	    var validation = function checkFixmeTag(entity) {
+	  var __importStar = commonjsGlobal && commonjsGlobal.__importStar || function (mod) {
+	    if (mod && mod.__esModule) return mod;
+	    var result = {};
+	    if (mod != null) for (var k in mod) {
+	      if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
+	    }
+	    result["default"] = mod;
+	    return result;
+	  };
 
-	        if (!entity.tags.fixme) { return []; }
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
 
-	        // don't flag fixmes on features added by the user
-	        if (entity.version === undefined) { return []; }
+	  var lineclip = __importStar(lineclip_1);
+	  /**
+	   * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
+	   * [lineclip](https://github.com/mapbox/lineclip).
+	   * May result in degenerate edges when clipping Polygons.
+	   *
+	   * @name bboxClip
+	   * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
+	   * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
+	   * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
+	   * @example
+	   * var bbox = [0, 0, 10, 10];
+	   * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
+	   *
+	   * var clipped = turf.bboxClip(poly, bbox);
+	   *
+	   * //addToMap
+	   * var addToMap = [bbox, poly, clipped]
+	   */
 
-	        if (entity.v !== undefined) {
-	            var baseEntity = context.history().base().hasEntity(entity.id);
-	            // don't flag fixmes added by the user on existing features
-	            if (!baseEntity || !baseEntity.tags.fixme) { return []; }
-	        }
 
-	        return [new validationIssue({
-	            type: type,
-	            subtype: 'fixme_tag',
-	            severity: 'warning',
-	            message: function(context) {
-	                var entity = context.hasEntity(this.entityIds[0]);
-	                return entity ? _t('issues.fixme_tag.message', { feature: utilDisplayLabel(entity, context.graph()) }) : '';
-	            },
-	            dynamicFixes: function() {
-	                return [
-	                    new validationIssueFix({
-	                        title: _t('issues.fix.address_the_concern.title')
-	                    })
-	                ];
-	            },
-	            reference: showReference,
-	            entityIds: [entity.id]
-	        })];
+	  function bboxClip(feature, bbox) {
+	    var geom = invariant.getGeom(feature);
+	    var type = geom.type;
+	    var properties = feature.type === "Feature" ? feature.properties : {};
+	    var coords = geom.coordinates;
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.fixme_tag.reference'));
-	        }
-	    };
+	    switch (type) {
+	      case "LineString":
+	      case "MultiLineString":
+	        var lines_1 = [];
 
-	    validation.type = type;
+	        if (type === "LineString") {
+	          coords = [coords];
+	        }
 
-	    return validation;
-	}
+	        coords.forEach(function (line) {
+	          lineclip.polyline(line, bbox, lines_1);
+	        });
 
-	function validationImpossibleOneway() {
-	    var type = 'impossible_oneway';
+	        if (lines_1.length === 1) {
+	          return helpers$1.lineString(lines_1[0], properties);
+	        }
 
-	    var validation = function checkImpossibleOneway(entity, graph) {
+	        return helpers$1.multiLineString(lines_1, properties);
 
-	        if (entity.type !== 'way' || entity.geometry(graph) !== 'line') { return []; }
+	      case "Polygon":
+	        return helpers$1.polygon(clipPolygon(coords, bbox), properties);
 
-	        if (entity.isClosed()) { return []; }
+	      case "MultiPolygon":
+	        return helpers$1.multiPolygon(coords.map(function (poly) {
+	          return clipPolygon(poly, bbox);
+	        }), properties);
 
-	        if (!typeForWay(entity)) { return []; }
+	      default:
+	        throw new Error("geometry " + type + " not supported");
+	    }
+	  }
 
-	        if (!isOneway(entity)) { return []; }
+	  exports["default"] = bboxClip;
 
-	        var firstIssues = issuesForNode(entity, entity.first());
-	        var lastIssues = issuesForNode(entity, entity.last());
+	  function clipPolygon(rings, bbox) {
+	    var outRings = [];
 
-	        return firstIssues.concat(lastIssues);
+	    for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
+	      var ring = rings_1[_i];
+	      var clipped = lineclip.polygon(ring, bbox);
 
-	        function typeForWay(way) {
-	            if (way.geometry(graph) !== 'line') { return null; }
+	      if (clipped.length > 0) {
+	        if (clipped[0][0] !== clipped[clipped.length - 1][0] || clipped[0][1] !== clipped[clipped.length - 1][1]) {
+	          clipped.push(clipped[0]);
+	        }
 
-	            if (osmRoutableHighwayTagValues[way.tags.highway]) { return 'highway'; }
-	            if (osmFlowingWaterwayTagValues[way.tags.waterway]) { return 'waterway'; }
-	            return null;
+	        if (clipped.length >= 4) {
+	          outRings.push(clipped);
 	        }
+	      }
+	    }
 
-	        function isOneway(way) {
-	            if (way.tags.oneway === 'yes') { return true; }
-	            if (way.tags.oneway) { return false; }
+	    return outRings;
+	  }
+	});
+	var turf_bboxClip = /*@__PURE__*/getDefaultExportFromCjs(bboxClip_1);
 
-	            for (var key in way.tags) {
-	                if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
-	                    return true;
-	                }
-	            }
-	            return false;
-	        }
+	var fastJsonStableStringify = function fastJsonStableStringify(data, opts) {
+	  if (!opts) opts = {};
+	  if (typeof opts === 'function') opts = {
+	    cmp: opts
+	  };
+	  var cycles = typeof opts.cycles === 'boolean' ? opts.cycles : false;
 
-	        function nodeOccursMoreThanOnce(way, nodeID) {
-	            var occurences = 0;
-	            for (var index in way.nodes) {
-	                if (way.nodes[index] === nodeID) {
-	                    occurences += 1;
-	                    if (occurences > 1) { return true; }
-	                }
-	            }
-	            return false;
-	        }
+	  var cmp = opts.cmp && function (f) {
+	    return function (node) {
+	      return function (a, b) {
+	        var aobj = {
+	          key: a,
+	          value: node[a]
+	        };
+	        var bobj = {
+	          key: b,
+	          value: node[b]
+	        };
+	        return f(aobj, bobj);
+	      };
+	    };
+	  }(opts.cmp);
 
-	        function isConnectedViaOtherTypes(way, node) {
+	  var seen = [];
+	  return function stringify(node) {
+	    if (node && node.toJSON && typeof node.toJSON === 'function') {
+	      node = node.toJSON();
+	    }
 
-	            var wayType = typeForWay(way);
+	    if (node === undefined) return;
+	    if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
+	    if (_typeof(node) !== 'object') return JSON.stringify(node);
+	    var i, out;
 
-	            if (wayType === 'highway') {
-	                // entrances are considered connected
-	                if (node.tags.entrance && node.tags.entrance !== 'no') { return true; }
-	                if (node.tags.amenity === 'parking_entrance') { return true; }
-	            } else if (wayType === 'waterway') {
-	                if (node.id === way.first()) {
-	                    // multiple waterways may start at the same spring
-	                    if (node.tags.natural === 'spring') { return true; }
-	                } else {
-	                    // multiple waterways may end at the same drain
-	                    if (node.tags.manhole === 'drain') { return true; }
-	                }
-	            }
+	    if (Array.isArray(node)) {
+	      out = '[';
 
-	            return graph.parentWays(node).some(function(parentWay) {
-	                if (parentWay.id === way.id) { return false; }
+	      for (i = 0; i < node.length; i++) {
+	        if (i) out += ',';
+	        out += stringify(node[i]) || 'null';
+	      }
 
-	                if (wayType === 'highway') {
+	      return out + ']';
+	    }
 
-	                    // allow connections to highway areas
-	                    if (parentWay.geometry(graph) === 'area' &&
-	                        osmRoutableHighwayTagValues[parentWay.tags.highway]) { return true; }
+	    if (node === null) return 'null';
 
-	                    // count connections to ferry routes as connected
-	                    if (parentWay.tags.route === 'ferry') { return true; }
+	    if (seen.indexOf(node) !== -1) {
+	      if (cycles) return JSON.stringify('__cycle__');
+	      throw new TypeError('Converting circular structure to JSON');
+	    }
 
-	                    return graph.parentRelations(parentWay).some(function(parentRelation) {
-	                        if (parentRelation.tags.type === 'route' &&
-	                            parentRelation.tags.route === 'ferry') { return true; }
+	    var seenIndex = seen.push(node) - 1;
+	    var keys = Object.keys(node).sort(cmp && cmp(node));
+	    out = '';
 
-	                        // allow connections to highway multipolygons
-	                        return parentRelation.isMultipolygon() && osmRoutableHighwayTagValues[parentRelation.tags.highway];
-	                    });
-	                } else if (wayType === 'waterway') {
-	                    // multiple waterways may start or end at a water body at the same node
-	                    if (parentWay.tags.natural === 'water' ||
-	                        parentWay.tags.natural === 'coastline') { return true; }
-	                }
-	                return false;
-	            });
-	        }
+	    for (i = 0; i < keys.length; i++) {
+	      var key = keys[i];
+	      var value = stringify(node[key]);
+	      if (!value) continue;
+	      if (out) out += ',';
+	      out += JSON.stringify(key) + ':' + value;
+	    }
 
-	        function issuesForNode(way, nodeID) {
+	    seen.splice(seenIndex, 1);
+	    return '{' + out + '}';
+	  }(data);
+	};
 
-	            var isFirst = nodeID === way.first();
+	function DEFAULT_COMPARE(a, b) {
+	  return a > b ? 1 : a < b ? -1 : 0;
+	}
 
-	            var wayType = typeForWay(way);
+	var SplayTree = /*#__PURE__*/function () {
+	  function SplayTree() {
+	    var compare = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : DEFAULT_COMPARE;
+	    var noDuplicates = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
 
-	            // ignore if this way is self-connected at this node
-	            if (nodeOccursMoreThanOnce(way, nodeID)) { return []; }
+	    _classCallCheck(this, SplayTree);
 
-	            var osm = services.osm;
-	            if (!osm) { return []; }
+	    this._compare = compare;
+	    this._root = null;
+	    this._size = 0;
+	    this._noDuplicates = !!noDuplicates;
+	  }
 
-	            var node = graph.hasEntity(nodeID);
+	  _createClass(SplayTree, [{
+	    key: "rotateLeft",
+	    value: function rotateLeft(x) {
+	      var y = x.right;
 
-	            // ignore if this node or its tile are unloaded
-	            if (!node || !osm.isDataLoaded(node.loc)) { return []; }
+	      if (y) {
+	        x.right = y.left;
+	        if (y.left) y.left.parent = x;
+	        y.parent = x.parent;
+	      }
 
-	            if (isConnectedViaOtherTypes(way, node)) { return []; }
+	      if (!x.parent) this._root = y;else if (x === x.parent.left) x.parent.left = y;else x.parent.right = y;
+	      if (y) y.left = x;
+	      x.parent = y;
+	    }
+	  }, {
+	    key: "rotateRight",
+	    value: function rotateRight(x) {
+	      var y = x.left;
+
+	      if (y) {
+	        x.left = y.right;
+	        if (y.right) y.right.parent = x;
+	        y.parent = x.parent;
+	      }
 
-	            var attachedWaysOfSameType = graph.parentWays(node).filter(function(parentWay) {
-	                if (parentWay.id === way.id) { return false; }
-	                return typeForWay(parentWay) === wayType;
-	            });
+	      if (!x.parent) this._root = y;else if (x === x.parent.left) x.parent.left = y;else x.parent.right = y;
+	      if (y) y.right = x;
+	      x.parent = y;
+	    }
+	  }, {
+	    key: "_splay",
+	    value: function _splay(x) {
+	      while (x.parent) {
+	        var p = x.parent;
+
+	        if (!p.parent) {
+	          if (p.left === x) this.rotateRight(p);else this.rotateLeft(p);
+	        } else if (p.left === x && p.parent.left === p) {
+	          this.rotateRight(p.parent);
+	          this.rotateRight(p);
+	        } else if (p.right === x && p.parent.right === p) {
+	          this.rotateLeft(p.parent);
+	          this.rotateLeft(p);
+	        } else if (p.left === x && p.parent.right === p) {
+	          this.rotateRight(p);
+	          this.rotateLeft(p);
+	        } else {
+	          this.rotateLeft(p);
+	          this.rotateRight(p);
+	        }
+	      }
+	    }
+	  }, {
+	    key: "splay",
+	    value: function splay(x) {
+	      var p, gp, ggp, l, r;
+
+	      while (x.parent) {
+	        p = x.parent;
+	        gp = p.parent;
+
+	        if (gp && gp.parent) {
+	          ggp = gp.parent;
+	          if (ggp.left === gp) ggp.left = x;else ggp.right = x;
+	          x.parent = ggp;
+	        } else {
+	          x.parent = null;
+	          this._root = x;
+	        }
 
-	            // assume it's okay for waterways to start or end disconnected for now
-	            if (wayType === 'waterway' && attachedWaysOfSameType.length === 0) { return []; }
+	        l = x.left;
+	        r = x.right;
 
-	            var attachedOneways = attachedWaysOfSameType.filter(function(attachedWay) {
-	                return isOneway(attachedWay);
-	            });
+	        if (x === p.left) {
+	          // left
+	          if (gp) {
+	            if (gp.left === p) {
+	              /* zig-zig */
+	              if (p.right) {
+	                gp.left = p.right;
+	                gp.left.parent = gp;
+	              } else gp.left = null;
 
-	            // ignore if the way is connected to some non-oneway features
-	            if (attachedOneways.length < attachedWaysOfSameType.length) { return []; }
+	              p.right = gp;
+	              gp.parent = p;
+	            } else {
+	              /* zig-zag */
+	              if (l) {
+	                gp.right = l;
+	                l.parent = gp;
+	              } else gp.right = null;
 
-	            if (attachedOneways.length) {
-	                var connectedEndpointsOkay = attachedOneways.some(function(attachedOneway) {
-	                    if ((isFirst ? attachedOneway.first() : attachedOneway.last()) !== nodeID) { return true; }
-	                    if (nodeOccursMoreThanOnce(attachedOneway, nodeID)) { return true; }
-	                    return false;
-	                });
-	                if (connectedEndpointsOkay) { return []; }
+	              x.left = gp;
+	              gp.parent = x;
 	            }
+	          }
 
-	            var placement = isFirst ? 'start' : 'end',
-	                messageID = wayType + '.',
-	                referenceID = wayType + '.';
+	          if (r) {
+	            p.left = r;
+	            r.parent = p;
+	          } else p.left = null;
 
-	            if (wayType === 'waterway') {
-	                messageID += 'connected.' + placement;
-	                referenceID += 'connected';
+	          x.right = p;
+	          p.parent = x;
+	        } else {
+	          // right
+	          if (gp) {
+	            if (gp.right === p) {
+	              /* zig-zig */
+	              if (p.left) {
+	                gp.right = p.left;
+	                gp.right.parent = gp;
+	              } else gp.right = null;
+
+	              p.left = gp;
+	              gp.parent = p;
 	            } else {
-	                messageID += placement;
-	                referenceID += placement;
+	              /* zig-zag */
+	              if (r) {
+	                gp.left = r;
+	                r.parent = gp;
+	              } else gp.left = null;
+
+	              x.right = gp;
+	              gp.parent = x;
 	            }
+	          }
 
-	            return [new validationIssue({
-	                type: type,
-	                subtype: wayType,
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.impossible_oneway.' + messageID + '.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: getReference(referenceID),
-	                entityIds: [way.id, node.id],
-	                dynamicFixes: function() {
-
-	                    var fixes = [];
-
-	                    if (attachedOneways.length) {
-	                        fixes.push(new validationIssueFix({
-	                            icon: 'iD-operation-reverse',
-	                            title: _t('issues.fix.reverse_feature.title'),
-	                            entityIds: [way.id],
-	                            onClick: function(context) {
-	                                var id = this.issue.entityIds[0];
-	                                context.perform(actionReverse(id), _t('operations.reverse.annotation'));
-	                            }
-	                        }));
-	                    }
-	                    if (node.tags.noexit !== 'yes') {
-	                        var textDirection = _mainLocalizer.textDirection();
-	                        var useLeftContinue = (isFirst && textDirection === 'ltr') ||
-	                            (!isFirst && textDirection === 'rtl');
-	                        fixes.push(new validationIssueFix({
-	                            icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
-	                            title: _t('issues.fix.continue_from_' + (isFirst ? 'start' : 'end') + '.title'),
-	                            onClick: function(context) {
-	                                var entityID = this.issue.entityIds[0];
-	                                var vertexID = this.issue.entityIds[1];
-	                                var way = context.entity(entityID);
-	                                var vertex = context.entity(vertexID);
-	                                continueDrawing(way, vertex, context);
-	                            }
-	                        }));
-	                    }
+	          if (l) {
+	            p.right = l;
+	            l.parent = p;
+	          } else p.right = null;
 
-	                    return fixes;
-	                },
-	                loc: node.loc
-	            })];
-
-	            function getReference(referenceID) {
-	                return function showReference(selection) {
-	                    selection.selectAll('.issue-reference')
-	                        .data([0])
-	                        .enter()
-	                        .append('div')
-	                        .attr('class', 'issue-reference')
-	                        .text(_t('issues.impossible_oneway.' + referenceID + '.reference'));
-	                };
-	            }
+	          x.left = p;
+	          p.parent = x;
 	        }
-	    };
-
-	    function continueDrawing(way, vertex, context) {
-	        // make sure the vertex is actually visible and editable
-	        var map = context.map();
-	        if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-	            map.zoomToEase(vertex);
+	      }
+	    }
+	  }, {
+	    key: "replace",
+	    value: function replace(u, v) {
+	      if (!u.parent) this._root = v;else if (u === u.parent.left) u.parent.left = v;else u.parent.right = v;
+	      if (v) v.parent = u.parent;
+	    }
+	  }, {
+	    key: "minNode",
+	    value: function minNode() {
+	      var u = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._root;
+	      if (u) while (u.left) {
+	        u = u.left;
+	      }
+	      return u;
+	    }
+	  }, {
+	    key: "maxNode",
+	    value: function maxNode() {
+	      var u = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._root;
+	      if (u) while (u.right) {
+	        u = u.right;
+	      }
+	      return u;
+	    }
+	  }, {
+	    key: "insert",
+	    value: function insert(key, data) {
+	      var z = this._root;
+	      var p = null;
+	      var comp = this._compare;
+	      var cmp;
+
+	      if (this._noDuplicates) {
+	        while (z) {
+	          p = z;
+	          cmp = comp(z.key, key);
+	          if (cmp === 0) return;else if (comp(z.key, key) < 0) z = z.right;else z = z.left;
+	        }
+	      } else {
+	        while (z) {
+	          p = z;
+	          if (comp(z.key, key) < 0) z = z.right;else z = z.left;
 	        }
+	      }
 
-	        context.enter(
-	            modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true)
-	        );
+	      z = {
+	        key: key,
+	        data: data,
+	        left: null,
+	        right: null,
+	        parent: p
+	      };
+	      if (!p) this._root = z;else if (comp(p.key, z.key) < 0) p.right = z;else p.left = z;
+	      this.splay(z);
+	      this._size++;
+	      return z;
 	    }
+	  }, {
+	    key: "find",
+	    value: function find(key) {
+	      var z = this._root;
+	      var comp = this._compare;
+
+	      while (z) {
+	        var cmp = comp(z.key, key);
+	        if (cmp < 0) z = z.right;else if (cmp > 0) z = z.left;else return z;
+	      }
 
-	    validation.type = type;
+	      return null;
+	    }
+	    /**
+	     * Whether the tree contains a node with the given key
+	     * @param  {Key} key
+	     * @return {boolean} true/false
+	     */
 
-	    return validation;
-	}
+	  }, {
+	    key: "contains",
+	    value: function contains(key) {
+	      var node = this._root;
+	      var comparator = this._compare;
+
+	      while (node) {
+	        var cmp = comparator(key, node.key);
+	        if (cmp === 0) return true;else if (cmp < 0) node = node.left;else node = node.right;
+	      }
 
-	function validationIncompatibleSource() {
-	    var type = 'incompatible_source';
-	    var invalidSources = [
-	        {
-	            id:'google', regex:'google', exceptRegex: 'books.google|Google Books|drive.google|googledrive|Google Drive'
-	        }
-	    ];
+	      return false;
+	    }
+	  }, {
+	    key: "remove",
+	    value: function remove(key) {
+	      var z = this.find(key);
+	      if (!z) return false;
+	      this.splay(z);
+	      if (!z.left) this.replace(z, z.right);else if (!z.right) this.replace(z, z.left);else {
+	        var y = this.minNode(z.right);
+
+	        if (y.parent !== z) {
+	          this.replace(y, y.right);
+	          y.right = z.right;
+	          y.right.parent = y;
+	        }
+
+	        this.replace(z, y);
+	        y.left = z.left;
+	        y.left.parent = y;
+	      }
+	      this._size--;
+	      return true;
+	    }
+	  }, {
+	    key: "removeNode",
+	    value: function removeNode(z) {
+	      if (!z) return false;
+	      this.splay(z);
+	      if (!z.left) this.replace(z, z.right);else if (!z.right) this.replace(z, z.left);else {
+	        var y = this.minNode(z.right);
+
+	        if (y.parent !== z) {
+	          this.replace(y, y.right);
+	          y.right = z.right;
+	          y.right.parent = y;
+	        }
+
+	        this.replace(z, y);
+	        y.left = z.left;
+	        y.left.parent = y;
+	      }
+	      this._size--;
+	      return true;
+	    }
+	  }, {
+	    key: "erase",
+	    value: function erase(key) {
+	      var z = this.find(key);
+	      if (!z) return;
+	      this.splay(z);
+	      var s = z.left;
+	      var t = z.right;
+	      var sMax = null;
+
+	      if (s) {
+	        s.parent = null;
+	        sMax = this.maxNode(s);
+	        this.splay(sMax);
+	        this._root = sMax;
+	      }
 
-	    var validation = function checkIncompatibleSource(entity) {
+	      if (t) {
+	        if (s) sMax.right = t;else this._root = t;
+	        t.parent = sMax;
+	      }
 
-	        var entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
+	      this._size--;
+	    }
+	    /**
+	     * Removes and returns the node with smallest key
+	     * @return {?Node}
+	     */
 
-	        if (!entitySources) { return []; }
+	  }, {
+	    key: "pop",
+	    value: function pop() {
+	      var node = this._root,
+	          returnValue = null;
 
-	        var issues = [];
+	      if (node) {
+	        while (node.left) {
+	          node = node.left;
+	        }
 
-	        invalidSources.forEach(function(invalidSource) {
+	        returnValue = {
+	          key: node.key,
+	          data: node.data
+	        };
+	        this.remove(node.key);
+	      }
 
-	            var hasInvalidSource = entitySources.some(function(source) {
-	                if (!source.match(new RegExp(invalidSource.regex, 'i'))) { return false; }
-	                if (invalidSource.exceptRegex && source.match(new RegExp(invalidSource.exceptRegex, 'i'))) { return false; }
-	                return true;
-	            });
+	      return returnValue;
+	    }
+	    /* eslint-disable class-methods-use-this */
 
-	            if (!hasInvalidSource) { return; }
+	    /**
+	     * Successor node
+	     * @param  {Node} node
+	     * @return {?Node}
+	     */
 
-	            issues.push(new validationIssue({
-	                type: type,
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.incompatible_source.' + invalidSource.id + '.feature.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: getReference(invalidSource.id),
-	                entityIds: [entity.id],
-	                dynamicFixes: function() {
-	                    return [
-	                        new validationIssueFix({
-	                            title: _t('issues.fix.remove_proprietary_data.title')
-	                        })
-	                    ];
-	                }
-	            }));
-	        });
+	  }, {
+	    key: "next",
+	    value: function next(node) {
+	      var successor = node;
 
-	        return issues;
+	      if (successor) {
+	        if (successor.right) {
+	          successor = successor.right;
 
+	          while (successor && successor.left) {
+	            successor = successor.left;
+	          }
+	        } else {
+	          successor = node.parent;
 
-	        function getReference(id) {
-	            return function showReference(selection) {
-	                selection.selectAll('.issue-reference')
-	                    .data([0])
-	                    .enter()
-	                    .append('div')
-	                    .attr('class', 'issue-reference')
-	                    .text(_t('issues.incompatible_source.' + id + '.reference'));
-	            };
+	          while (successor && successor.right === node) {
+	            node = successor;
+	            successor = successor.parent;
+	          }
 	        }
-	    };
-
-	    validation.type = type;
+	      }
 
-	    return validation;
-	}
+	      return successor;
+	    }
+	    /**
+	     * Predecessor node
+	     * @param  {Node} node
+	     * @return {?Node}
+	     */
 
-	function validationMaprules() {
-	    var type = 'maprules';
+	  }, {
+	    key: "prev",
+	    value: function prev(node) {
+	      var predecessor = node;
 
-	    var validation = function checkMaprules(entity, graph) {
-	        if (!services.maprules) { return []; }
+	      if (predecessor) {
+	        if (predecessor.left) {
+	          predecessor = predecessor.left;
 
-	        var rules = services.maprules.validationRules();
-	        var issues = [];
+	          while (predecessor && predecessor.right) {
+	            predecessor = predecessor.right;
+	          }
+	        } else {
+	          predecessor = node.parent;
 
-	        for (var i = 0; i < rules.length; i++) {
-	            var rule = rules[i];
-	            rule.findIssues(entity, graph, issues);
+	          while (predecessor && predecessor.left === node) {
+	            node = predecessor;
+	            predecessor = predecessor.parent;
+	          }
 	        }
+	      }
 
-	        return issues;
-	    };
+	      return predecessor;
+	    }
+	    /* eslint-enable class-methods-use-this */
 
+	    /**
+	     * @param  {forEachCallback} callback
+	     * @return {SplayTree}
+	     */
 
-	    validation.type = type;
+	  }, {
+	    key: "forEach",
+	    value: function forEach(callback) {
+	      var current = this._root;
+	      var s = [],
+	          done = false,
+	          i = 0;
+
+	      while (!done) {
+	        // Reach the left most Node of the current Node
+	        if (current) {
+	          // Place pointer to a tree node on the stack
+	          // before traversing the node's left subtree
+	          s.push(current);
+	          current = current.left;
+	        } else {
+	          // BackTrack from the empty subtree and visit the Node
+	          // at the top of the stack; however, if the stack is
+	          // empty you are done
+	          if (s.length > 0) {
+	            current = s.pop();
+	            callback(current, i++); // We have visited the node and its left
+	            // subtree. Now, it's right subtree's turn
 
-	    return validation;
-	}
+	            current = current.right;
+	          } else done = true;
+	        }
+	      }
 
-	function validationMismatchedGeometry() {
-	    var type = 'mismatched_geometry';
+	      return this;
+	    }
+	    /**
+	     * Walk key range from `low` to `high`. Stops if `fn` returns a value.
+	     * @param  {Key}      low
+	     * @param  {Key}      high
+	     * @param  {Function} fn
+	     * @param  {*?}       ctx
+	     * @return {SplayTree}
+	     */
 
-	    function tagSuggestingLineIsArea(entity) {
-	        if (entity.type !== 'way' || entity.isClosed()) { return null; }
+	  }, {
+	    key: "range",
+	    value: function range(low, high, fn, ctx) {
+	      var Q = [];
+	      var compare = this._compare;
+	      var node = this._root,
+	          cmp;
+
+	      while (Q.length !== 0 || node) {
+	        if (node) {
+	          Q.push(node);
+	          node = node.left;
+	        } else {
+	          node = Q.pop();
+	          cmp = compare(node.key, high);
 
-	        var tagSuggestingArea = entity.tagSuggestingArea();
-	        if (!tagSuggestingArea) {
-	            return null;
-	        }
+	          if (cmp > 0) {
+	            break;
+	          } else if (compare(node.key, low) >= 0) {
+	            if (fn.call(ctx, node)) return this; // stop if smth is returned
+	          }
 
-	        var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
-	        var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
-	        if (asLine && asArea && (asLine === asArea)) {
-	            // these tags also allow lines and making this an area wouldn't matter
-	            return null;
+	          node = node.right;
 	        }
+	      }
 
-	        return tagSuggestingArea;
+	      return this;
 	    }
+	    /**
+	     * Returns all keys in order
+	     * @return {Array<Key>}
+	     */
 
+	  }, {
+	    key: "keys",
+	    value: function keys() {
+	      var current = this._root;
+	      var s = [],
+	          r = [],
+	          done = false;
+
+	      while (!done) {
+	        if (current) {
+	          s.push(current);
+	          current = current.left;
+	        } else {
+	          if (s.length > 0) {
+	            current = s.pop();
+	            r.push(current.key);
+	            current = current.right;
+	          } else done = true;
+	        }
+	      }
 
-	    function makeConnectEndpointsFixOnClick(way, graph) {
-	        // must have at least three nodes to close this automatically
-	        if (way.nodes.length < 3) { return null; }
-
-	        var nodes = graph.childNodes(way), testNodes;
-	        var firstToLastDistanceMeters = geoSphericalDistance(nodes[0].loc, nodes[nodes.length-1].loc);
+	      return r;
+	    }
+	    /**
+	     * Returns `data` fields of all nodes in order.
+	     * @return {Array<Value>}
+	     */
 
-	        // if the distance is very small, attempt to merge the endpoints
-	        if (firstToLastDistanceMeters < 0.75) {
-	            testNodes = nodes.slice();   // shallow copy
-	            testNodes.pop();
-	            testNodes.push(testNodes[0]);
-	            // make sure this will not create a self-intersection
-	            if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
-	                return function(context) {
-	                    var way = context.entity(this.issue.entityIds[0]);
-	                    context.perform(
-	                        actionMergeNodes([way.nodes[0], way.nodes[way.nodes.length-1]], nodes[0].loc),
-	                        _t('issues.fix.connect_endpoints.annotation')
-	                    );
-	                };
-	            }
+	  }, {
+	    key: "values",
+	    value: function values() {
+	      var current = this._root;
+	      var s = [],
+	          r = [],
+	          done = false;
+
+	      while (!done) {
+	        if (current) {
+	          s.push(current);
+	          current = current.left;
+	        } else {
+	          if (s.length > 0) {
+	            current = s.pop();
+	            r.push(current.data);
+	            current = current.right;
+	          } else done = true;
 	        }
+	      }
 
-	        // if the points were not merged, attempt to close the way
-	        testNodes = nodes.slice();   // shallow copy
-	        testNodes.push(testNodes[0]);
-	        // make sure this will not create a self-intersection
-	        if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
-	            return function(context) {
-	                var wayId = this.issue.entityIds[0];
-	                var way = context.entity(wayId);
-	                var nodeId = way.nodes[0];
-	                var index = way.nodes.length;
-	                context.perform(
-	                    actionAddVertex(wayId, nodeId, index),
-	                    _t('issues.fix.connect_endpoints.annotation')
-	                );
-	            };
+	      return r;
+	    }
+	    /**
+	     * Returns node at given index
+	     * @param  {number} index
+	     * @return {?Node}
+	     */
+
+	  }, {
+	    key: "at",
+	    value: function at(index) {
+	      // removed after a consideration, more misleading than useful
+	      // index = index % this.size;
+	      // if (index < 0) index = this.size - index;
+	      var current = this._root;
+	      var s = [],
+	          done = false,
+	          i = 0;
+
+	      while (!done) {
+	        if (current) {
+	          s.push(current);
+	          current = current.left;
+	        } else {
+	          if (s.length > 0) {
+	            current = s.pop();
+	            if (i === index) return current;
+	            i++;
+	            current = current.right;
+	          } else done = true;
 	        }
+	      }
+
+	      return null;
 	    }
+	    /**
+	     * Bulk-load items. Both array have to be same size
+	     * @param  {Array<Key>}    keys
+	     * @param  {Array<Value>}  [values]
+	     * @param  {Boolean}       [presort=false] Pre-sort keys and values, using
+	     *                                         tree's comparator. Sorting is done
+	     *                                         in-place
+	     * @return {AVLTree}
+	     */
 
-	    function lineTaggedAsAreaIssue(entity) {
+	  }, {
+	    key: "load",
+	    value: function load() {
+	      var keys = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
+	      var values = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+	      var presort = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+	      if (this._size !== 0) throw new Error('bulk-load: tree is not empty');
+	      var size = keys.length;
+	      if (presort) sort(keys, values, 0, size - 1, this._compare);
+	      this._root = loadRecursive(null, keys, values, 0, size);
+	      this._size = size;
+	      return this;
+	    }
+	  }, {
+	    key: "min",
+	    value: function min() {
+	      var node = this.minNode(this._root);
+	      if (node) return node.key;else return null;
+	    }
+	  }, {
+	    key: "max",
+	    value: function max() {
+	      var node = this.maxNode(this._root);
+	      if (node) return node.key;else return null;
+	    }
+	  }, {
+	    key: "isEmpty",
+	    value: function isEmpty() {
+	      return this._root === null;
+	    }
+	  }, {
+	    key: "size",
+	    get: function get() {
+	      return this._size;
+	    }
+	    /**
+	     * Create a tree and load it with items
+	     * @param  {Array<Key>}          keys
+	     * @param  {Array<Value>?}        [values]
+	      * @param  {Function?}            [comparator]
+	     * @param  {Boolean?}             [presort=false] Pre-sort keys and values, using
+	     *                                               tree's comparator. Sorting is done
+	     *                                               in-place
+	     * @param  {Boolean?}             [noDuplicates=false]   Allow duplicates
+	     * @return {SplayTree}
+	     */
 
-	        var tagSuggestingArea = tagSuggestingLineIsArea(entity);
-	        if (!tagSuggestingArea) { return null; }
+	  }], [{
+	    key: "createTree",
+	    value: function createTree(keys, values, comparator, presort, noDuplicates) {
+	      return new SplayTree(comparator, noDuplicates).load(keys, values, presort);
+	    }
+	  }]);
 
-	        return new validationIssue({
-	            type: type,
-	            subtype: 'area_as_line',
-	            severity: 'warning',
-	            message: function(context) {
-	                var entity = context.hasEntity(this.entityIds[0]);
-	                return entity ? _t('issues.tag_suggests_area.message', {
-	                    feature: utilDisplayLabel(entity, context.graph()),
-	                    tag: utilTagText({ tags: tagSuggestingArea })
-	                }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: [entity.id],
-	            hash: JSON.stringify(tagSuggestingArea),
-	            dynamicFixes: function(context) {
+	  return SplayTree;
+	}();
 
-	                var fixes = [];
+	function loadRecursive(parent, keys, values, start, end) {
+	  var size = end - start;
 
-	                var entity = context.entity(this.entityIds[0]);
-	                var connectEndsOnClick = makeConnectEndpointsFixOnClick(entity, context.graph());
+	  if (size > 0) {
+	    var middle = start + Math.floor(size / 2);
+	    var key = keys[middle];
+	    var data = values[middle];
+	    var node = {
+	      key: key,
+	      data: data,
+	      parent: parent
+	    };
+	    node.left = loadRecursive(node, keys, values, start, middle);
+	    node.right = loadRecursive(node, keys, values, middle + 1, end);
+	    return node;
+	  }
 
-	                fixes.push(new validationIssueFix({
-	                    title: _t('issues.fix.connect_endpoints.title'),
-	                    onClick: connectEndsOnClick
-	                }));
+	  return null;
+	}
 
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-operation-delete',
-	                    title: _t('issues.fix.remove_tag.title'),
-	                    onClick: function(context) {
-	                        var entityId = this.issue.entityIds[0];
-	                        var entity = context.entity(entityId);
-	                        var tags = Object.assign({}, entity.tags);  // shallow copy
-	                        for (var key in tagSuggestingArea) {
-	                            delete tags[key];
-	                        }
-	                        context.perform(
-	                            actionChangeTags(entityId, tags),
-	                            _t('issues.fix.remove_tag.annotation')
-	                        );
-	                    }
-	                }));
+	function sort(keys, values, left, right, compare) {
+	  if (left >= right) return;
+	  var pivot = keys[left + right >> 1];
+	  var i = left - 1;
+	  var j = right + 1;
 
-	                return fixes;
-	            }
-	        });
+	  while (true) {
+	    do {
+	      i++;
+	    } while (compare(keys[i], pivot) < 0);
 
+	    do {
+	      j--;
+	    } while (compare(keys[j], pivot) > 0);
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.tag_suggests_area.reference'));
-	        }
-	    }
+	    if (i >= j) break;
+	    var tmp = keys[i];
+	    keys[i] = keys[j];
+	    keys[j] = tmp;
+	    tmp = values[i];
+	    values[i] = values[j];
+	    values[j] = tmp;
+	  }
 
-	    function vertexTaggedAsPointIssue(entity, graph) {
-	        // we only care about nodes
-	        if (entity.type !== 'node') { return null; }
+	  sort(keys, values, left, j, compare);
+	  sort(keys, values, j + 1, right, compare);
+	}
 
-	        // ignore tagless points
-	        if (Object.keys(entity.tags).length === 0) { return null; }
+	var NORMAL = 0;
+	var NON_CONTRIBUTING = 1;
+	var SAME_TRANSITION = 2;
+	var DIFFERENT_TRANSITION = 3;
 
-	        // address lines are special so just ignore them
-	        if (entity.isOnAddressLine(graph)) { return null; }
+	var INTERSECTION = 0;
+	var UNION = 1;
+	var DIFFERENCE = 2;
+	var XOR = 3;
 
-	        var geometry = entity.geometry(graph);
-	        var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
+	/**
+	 * @param  {SweepEvent} event
+	 * @param  {SweepEvent} prev
+	 * @param  {Operation} operation
+	 */
 
-	        if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
+	function computeFields(event, prev, operation) {
+	  // compute inOut and otherInOut fields
+	  if (prev === null) {
+	    event.inOut = false;
+	    event.otherInOut = true; // previous line segment in sweepline belongs to the same polygon
+	  } else {
+	    if (event.isSubject === prev.isSubject) {
+	      event.inOut = !prev.inOut;
+	      event.otherInOut = prev.otherInOut; // previous line segment in sweepline belongs to the clipping polygon
+	    } else {
+	      event.inOut = !prev.otherInOut;
+	      event.otherInOut = prev.isVertical() ? !prev.inOut : prev.inOut;
+	    } // compute prevInResult field
 
-	            return new validationIssue({
-	                type: type,
-	                subtype: 'vertex_as_point',
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.vertex_as_point.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: function showReference(selection) {
-	                    selection.selectAll('.issue-reference')
-	                        .data([0])
-	                        .enter()
-	                        .append('div')
-	                        .attr('class', 'issue-reference')
-	                        .text(_t('issues.vertex_as_point.reference'));
-	                },
-	                entityIds: [entity.id]
-	            });
 
-	        } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
+	    if (prev) {
+	      event.prevInResult = !inResult(prev, operation) || prev.isVertical() ? prev.prevInResult : prev;
+	    }
+	  } // check if the line segment belongs to the Boolean operation
 
-	            return new validationIssue({
-	                type: type,
-	                subtype: 'point_as_vertex',
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.point_as_vertex.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: function showReference(selection) {
-	                    selection.selectAll('.issue-reference')
-	                        .data([0])
-	                        .enter()
-	                        .append('div')
-	                        .attr('class', 'issue-reference')
-	                        .text(_t('issues.point_as_vertex.reference'));
-	                },
-	                entityIds: [entity.id],
-	                dynamicFixes: function(context) {
-
-	                    var entityId = this.entityIds[0];
-
-	                    var extractOnClick = null;
-	                    if (!context.hasHiddenConnections(entityId)) {
-
-	                        extractOnClick = function(context) {
-	                            var entityId = this.issue.entityIds[0];
-	                            var action = actionExtract(entityId);
-	                            context.perform(
-	                                action,
-	                                _t('operations.extract.annotation.single')
-	                            );
-	                            // re-enter mode to trigger updates
-	                            context.enter(modeSelect(context, [action.getExtractedNodeID()]));
-	                        };
-	                    }
 
-	                    return [
-	                        new validationIssueFix({
-	                            icon: 'iD-operation-extract',
-	                            title: _t('issues.fix.extract_point.title'),
-	                            onClick: extractOnClick
-	                        })
-	                    ];
-	                }
-	            });
-	        }
+	  var isInResult = inResult(event, operation);
 
-	        return null;
-	    }
+	  if (isInResult) {
+	    event.resultTransition = determineResultTransition(event, operation);
+	  } else {
+	    event.resultTransition = 0;
+	  }
+	}
+	/* eslint-disable indent */
 
-	    function unclosedMultipolygonPartIssues(entity, graph) {
+	function inResult(event, operation) {
+	  switch (event.type) {
+	    case NORMAL:
+	      switch (operation) {
+	        case INTERSECTION:
+	          return !event.otherInOut;
 
-	        if (entity.type !== 'relation' ||
-	            !entity.isMultipolygon() ||
-	            entity.isDegenerate() ||
-	            // cannot determine issues for incompletely-downloaded relations
-	            !entity.isComplete(graph)) { return null; }
+	        case UNION:
+	          return event.otherInOut;
 
-	        var sequences = osmJoinWays(entity.members, graph);
+	        case DIFFERENCE:
+	          // return (event.isSubject && !event.otherInOut) ||
+	          //         (!event.isSubject && event.otherInOut);
+	          return event.isSubject && event.otherInOut || !event.isSubject && !event.otherInOut;
 
-	        var issues = [];
+	        case XOR:
+	          return true;
+	      }
 
-	        for (var i in sequences) {
-	            var sequence = sequences[i];
+	      break;
 
-	            if (!sequence.nodes) { continue; }
+	    case SAME_TRANSITION:
+	      return operation === INTERSECTION || operation === UNION;
 
-	            var firstNode = sequence.nodes[0];
-	            var lastNode = sequence.nodes[sequence.nodes.length - 1];
+	    case DIFFERENT_TRANSITION:
+	      return operation === DIFFERENCE;
 
-	            // part is closed if the first and last nodes are the same
-	            if (firstNode === lastNode) { continue; }
+	    case NON_CONTRIBUTING:
+	      return false;
+	  }
 
-	            var issue = new validationIssue({
-	                type: type,
-	                subtype: 'unclosed_multipolygon_part',
-	                severity: 'warning',
-	                message: function(context) {
-	                    var entity = context.hasEntity(this.entityIds[0]);
-	                    return entity ? _t('issues.unclosed_multipolygon_part.message', {
-	                        feature: utilDisplayLabel(entity, context.graph())
-	                    }) : '';
-	                },
-	                reference: showReference,
-	                loc: sequence.nodes[0].loc,
-	                entityIds: [entity.id],
-	                hash: sequence.map(function(way) {
-	                    return way.id;
-	                }).join()
-	            });
-	            issues.push(issue);
-	        }
+	  return false;
+	}
+	/* eslint-enable indent */
 
-	        return issues;
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.unclosed_multipolygon_part.reference'));
-	        }
-	    }
+	function determineResultTransition(event, operation) {
+	  var thisIn = !event.inOut;
+	  var thatIn = !event.otherInOut;
+	  var isIn;
 
-	    var validation = function checkMismatchedGeometry(entity, graph) {
-	        var issues = [
-	            vertexTaggedAsPointIssue(entity, graph),
-	            lineTaggedAsAreaIssue(entity)
-	        ];
-	        issues = issues.concat(unclosedMultipolygonPartIssues(entity, graph));
-	        return issues.filter(Boolean);
-	    };
+	  switch (operation) {
+	    case INTERSECTION:
+	      isIn = thisIn && thatIn;
+	      break;
 
-	    validation.type = type;
+	    case UNION:
+	      isIn = thisIn || thatIn;
+	      break;
 
-	    return validation;
-	}
+	    case XOR:
+	      isIn = thisIn ^ thatIn;
+	      break;
 
-	function validationMissingRole() {
-	    var type = 'missing_role';
+	    case DIFFERENCE:
+	      if (event.isSubject) {
+	        isIn = thisIn && !thatIn;
+	      } else {
+	        isIn = thatIn && !thisIn;
+	      }
 
-	    var validation = function checkMissingRole(entity, graph) {
-	        var issues = [];
-	        if (entity.type === 'way') {
-	            graph.parentRelations(entity).forEach(function(relation) {
-	                if (!relation.isMultipolygon()) { return; }
+	      break;
+	  }
 
-	                var member = relation.memberById(entity.id);
-	                if (member && isMissingRole(member)) {
-	                    issues.push(makeIssue(entity, relation, member));
-	                }
-	            });
-	        } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-	            entity.indexedMembers().forEach(function(member) {
-	                var way = graph.hasEntity(member.id);
-	                if (way && isMissingRole(member)) {
-	                    issues.push(makeIssue(way, entity, member));
-	                }
-	            });
-	        }
+	  return isIn ? +1 : -1;
+	}
 
-	        return issues;
-	    };
+	var SweepEvent = /*#__PURE__*/function () {
+	  /**
+	   * Sweepline event
+	   *
+	   * @class {SweepEvent}
+	   * @param {Array.<Number>}  point
+	   * @param {Boolean}         left
+	   * @param {SweepEvent=}     otherEvent
+	   * @param {Boolean}         isSubject
+	   * @param {Number}          edgeType
+	   */
+	  function SweepEvent(point, left, otherEvent, isSubject, edgeType) {
+	    _classCallCheck(this, SweepEvent);
 
+	    /**
+	     * Is left endpoint?
+	     * @type {Boolean}
+	     */
+	    this.left = left;
+	    /**
+	     * @type {Array.<Number>}
+	     */
 
-	    function isMissingRole(member) {
-	        return !member.role || !member.role.trim().length;
-	    }
+	    this.point = point;
+	    /**
+	     * Other edge reference
+	     * @type {SweepEvent}
+	     */
 
+	    this.otherEvent = otherEvent;
+	    /**
+	     * Belongs to source or clipping polygon
+	     * @type {Boolean}
+	     */
 
-	    function makeIssue(way, relation, member) {
-	        return new validationIssue({
-	            type: type,
-	            severity: 'warning',
-	            message: function(context) {
-	                var member = context.hasEntity(this.entityIds[1]),
-	                    relation = context.hasEntity(this.entityIds[0]);
-	                return (member && relation) ? _t('issues.missing_role.message', {
-	                    member: utilDisplayLabel(member, context.graph()),
-	                    relation: utilDisplayLabel(relation, context.graph())
-	                }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: [relation.id, way.id],
-	            data: {
-	                member: member
-	            },
-	            hash: member.index.toString(),
-	            dynamicFixes: function() {
-	                return [
-	                    makeAddRoleFix('inner'),
-	                    makeAddRoleFix('outer'),
-	                    new validationIssueFix({
-	                        icon: 'iD-operation-delete',
-	                        title: _t('issues.fix.remove_from_relation.title'),
-	                        onClick: function(context) {
-	                            context.perform(
-	                                actionDeleteMember(this.issue.entityIds[0], this.issue.data.member.index),
-	                                _t('operations.delete_member.annotation')
-	                            );
-	                        }
-	                    })
-	                ];
-	            }
-	        });
+	    this.isSubject = isSubject;
+	    /**
+	     * Edge contribution type
+	     * @type {Number}
+	     */
 
+	    this.type = edgeType || NORMAL;
+	    /**
+	     * In-out transition for the sweepline crossing polygon
+	     * @type {Boolean}
+	     */
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.missing_role.multipolygon.reference'));
-	        }
-	    }
+	    this.inOut = false;
+	    /**
+	     * @type {Boolean}
+	     */
 
+	    this.otherInOut = false;
+	    /**
+	     * Previous event in result?
+	     * @type {SweepEvent}
+	     */
 
-	    function makeAddRoleFix(role) {
-	        return new validationIssueFix({
-	            title: _t('issues.fix.set_as_' + role + '.title'),
-	            onClick: function(context) {
-	                var oldMember = this.issue.data.member;
-	                var member = { id: this.issue.entityIds[1], type: oldMember.type, role: role };
-	                context.perform(
-	                    actionChangeMember(this.issue.entityIds[0], member, oldMember.index),
-	                    _t('operations.change_role.annotation')
-	                );
-	            }
-	        });
-	    }
+	    this.prevInResult = null;
+	    /**
+	     * Type of result transition (0 = not in result, +1 = out-in, -1, in-out)
+	     * @type {Number}
+	     */
 
-	    validation.type = type;
+	    this.resultTransition = 0; // connection step
 
-	    return validation;
-	}
+	    /**
+	     * @type {Number}
+	     */
 
-	function validationMissingTag(context) {
-	    var type = 'missing_tag';
-
-	    function hasDescriptiveTags(entity, graph) {
-	        var keys = Object.keys(entity.tags)
-	            .filter(function(k) {
-	                if (k === 'area' || k === 'name') {
-	                    return false;
-	                } else {
-	                    return osmIsInterestingTag(k);
-	                }
-	            });
+	    this.otherPos = -1;
+	    /**
+	     * @type {Number}
+	     */
 
-	        if (entity.type === 'relation' &&
-	            keys.length === 1 &&
-	            entity.tags.type === 'multipolygon') {
-	            // this relation's only interesting tag just says its a multipolygon,
-	            // which is not descriptive enough
+	    this.outputContourId = -1;
+	    this.isExteriorRing = true; // TODO: Looks unused, remove?
+	  }
+	  /**
+	   * @param  {Array.<Number>}  p
+	   * @return {Boolean}
+	   */
 
-	            // It's okay for a simple multipolygon to have no descriptive tags
-	            // if its outer way has them (old model, see `outdated_tags.js`)
-	            return osmOldMultipolygonOuterMemberOfRelation(entity, graph);
-	        }
 
-	        return keys.length > 0;
+	  _createClass(SweepEvent, [{
+	    key: "isBelow",
+	    value: function isBelow(p) {
+	      var p0 = this.point,
+	          p1 = this.otherEvent.point;
+	      return this.left ? (p0[0] - p[0]) * (p1[1] - p[1]) - (p1[0] - p[0]) * (p0[1] - p[1]) > 0 // signedArea(this.point, this.otherEvent.point, p) > 0 :
+	      : (p1[0] - p[0]) * (p0[1] - p[1]) - (p0[0] - p[0]) * (p1[1] - p[1]) > 0; //signedArea(this.otherEvent.point, this.point, p) > 0;
 	    }
+	    /**
+	     * @param  {Array.<Number>}  p
+	     * @return {Boolean}
+	     */
 
-	    function isUnknownRoad(entity) {
-	        return entity.type === 'way' && entity.tags.highway === 'road';
+	  }, {
+	    key: "isAbove",
+	    value: function isAbove(p) {
+	      return !this.isBelow(p);
 	    }
+	    /**
+	     * @return {Boolean}
+	     */
 
-	    function isUntypedRelation(entity) {
-	        return entity.type === 'relation' && !entity.tags.type;
+	  }, {
+	    key: "isVertical",
+	    value: function isVertical() {
+	      return this.point[0] === this.otherEvent.point[0];
 	    }
+	    /**
+	     * Does event belong to result?
+	     * @return {Boolean}
+	     */
 
-	    var validation = function checkMissingTag(entity, graph) {
+	  }, {
+	    key: "clone",
+	    value: function clone() {
+	      var copy = new SweepEvent(this.point, this.left, this.otherEvent, this.isSubject, this.type);
+	      copy.contourId = this.contourId;
+	      copy.resultTransition = this.resultTransition;
+	      copy.prevInResult = this.prevInResult;
+	      copy.isExteriorRing = this.isExteriorRing;
+	      copy.inOut = this.inOut;
+	      copy.otherInOut = this.otherInOut;
+	      return copy;
+	    }
+	  }, {
+	    key: "inResult",
+	    get: function get() {
+	      return this.resultTransition !== 0;
+	    }
+	  }]);
 
-	        var subtype;
+	  return SweepEvent;
+	}();
 
-	        var osm = context.connection();
-	        var isUnloadedNode = entity.type === 'node' && osm && !osm.isDataLoaded(entity.loc);
+	function equals(p1, p2) {
+	  if (p1[0] === p2[0]) {
+	    if (p1[1] === p2[1]) {
+	      return true;
+	    } else {
+	      return false;
+	    }
+	  }
 
-	        // we can't know if the node is a vertex if the tile is undownloaded
-	        if (!isUnloadedNode &&
-	            // allow untagged nodes that are part of ways
-	            entity.geometry(graph) !== 'vertex' &&
-	            // allow untagged entities that are part of relations
-	            !entity.hasParentRelations(graph)) {
+	  return false;
+	} // const EPSILON = 1e-9;
+	// const abs = Math.abs;
+	// TODO https://github.com/w8r/martinez/issues/6#issuecomment-262847164
+	// Precision problem.
+	//
+	// module.exports = function equals(p1, p2) {
+	//   return abs(p1[0] - p2[0]) <= EPSILON && abs(p1[1] - p2[1]) <= EPSILON;
+	// };
 
-	            if (Object.keys(entity.tags).length === 0) {
-	                subtype = 'any';
-	            } else if (!hasDescriptiveTags(entity, graph)) {
-	                subtype = 'descriptive';
-	            } else if (isUntypedRelation(entity)) {
-	                subtype = 'relation_type';
-	            }
-	        }
+	var epsilon$1 = 1.1102230246251565e-16;
+	var splitter = 134217729;
+	var resulterrbound = (3 + 8 * epsilon$1) * epsilon$1; // fast_expansion_sum_zeroelim routine from oritinal code
+
+	function sum(elen, e, flen, f, h) {
+	  var Q, Qnew, hh, bvirt;
+	  var enow = e[0];
+	  var fnow = f[0];
+	  var eindex = 0;
+	  var findex = 0;
+
+	  if (fnow > enow === fnow > -enow) {
+	    Q = enow;
+	    enow = e[++eindex];
+	  } else {
+	    Q = fnow;
+	    fnow = f[++findex];
+	  }
 
-	        // flag an unknown road even if it's a member of a relation
-	        if (!subtype && isUnknownRoad(entity)) {
-	            subtype = 'highway_classification';
-	        }
+	  var hindex = 0;
 
-	        if (!subtype) { return []; }
+	  if (eindex < elen && findex < flen) {
+	    if (fnow > enow === fnow > -enow) {
+	      Qnew = enow + Q;
+	      hh = Q - (Qnew - enow);
+	      enow = e[++eindex];
+	    } else {
+	      Qnew = fnow + Q;
+	      hh = Q - (Qnew - fnow);
+	      fnow = f[++findex];
+	    }
 
-	        var messageID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag.' + subtype;
-	        var referenceID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag';
+	    Q = Qnew;
 
-	        // can always delete if the user created it in the first place..
-	        var canDelete = (entity.version === undefined || entity.v !== undefined);
-	        var severity = (canDelete && subtype !== 'highway_classification') ? 'error' : 'warning';
+	    if (hh !== 0) {
+	      h[hindex++] = hh;
+	    }
 
-	        return [new validationIssue({
-	            type: type,
-	            subtype: subtype,
-	            severity: severity,
-	            message: function(context) {
-	                var entity = context.hasEntity(this.entityIds[0]);
-	                return entity ? _t('issues.' + messageID + '.message', {
-	                    feature: utilDisplayLabel(entity, context.graph())
-	                }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: [entity.id],
-	            dynamicFixes: function(context) {
+	    while (eindex < elen && findex < flen) {
+	      if (fnow > enow === fnow > -enow) {
+	        Qnew = Q + enow;
+	        bvirt = Qnew - Q;
+	        hh = Q - (Qnew - bvirt) + (enow - bvirt);
+	        enow = e[++eindex];
+	      } else {
+	        Qnew = Q + fnow;
+	        bvirt = Qnew - Q;
+	        hh = Q - (Qnew - bvirt) + (fnow - bvirt);
+	        fnow = f[++findex];
+	      }
 
-	                var fixes = [];
+	      Q = Qnew;
 
-	                var selectFixType = subtype === 'highway_classification' ? 'select_road_type' : 'select_preset';
+	      if (hh !== 0) {
+	        h[hindex++] = hh;
+	      }
+	    }
+	  }
 
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-icon-search',
-	                    title: _t('issues.fix.' + selectFixType + '.title'),
-	                    onClick: function(context) {
-	                        context.ui().sidebar.showPresetList();
-	                    }
-	                }));
+	  while (eindex < elen) {
+	    Qnew = Q + enow;
+	    bvirt = Qnew - Q;
+	    hh = Q - (Qnew - bvirt) + (enow - bvirt);
+	    enow = e[++eindex];
+	    Q = Qnew;
 
-	                var deleteOnClick;
-
-	                var id = this.entityIds[0];
-	                var operation = operationDelete(context, [id]);
-	                var disabledReasonID = operation.disabled();
-	                if (!disabledReasonID) {
-	                    deleteOnClick = function(context) {
-	                        var id = this.issue.entityIds[0];
-	                        var operation = operationDelete(context, [id]);
-	                        if (!operation.disabled()) {
-	                            operation();
-	                        }
-	                    };
-	                }
+	    if (hh !== 0) {
+	      h[hindex++] = hh;
+	    }
+	  }
 
-	                fixes.push(
-	                    new validationIssueFix({
-	                        icon: 'iD-operation-delete',
-	                        title: _t('issues.fix.delete_feature.title'),
-	                        disabledReason: disabledReasonID ? _t('operations.delete.' + disabledReasonID + '.single') : undefined,
-	                        onClick: deleteOnClick
-	                    })
-	                );
+	  while (findex < flen) {
+	    Qnew = Q + fnow;
+	    bvirt = Qnew - Q;
+	    hh = Q - (Qnew - bvirt) + (fnow - bvirt);
+	    fnow = f[++findex];
+	    Q = Qnew;
 
-	                return fixes;
-	            }
-	        })];
+	    if (hh !== 0) {
+	      h[hindex++] = hh;
+	    }
+	  }
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.' + referenceID + '.reference'));
-	        }
-	    };
+	  if (Q !== 0 || hindex === 0) {
+	    h[hindex++] = Q;
+	  }
+
+	  return hindex;
+	}
+	function estimate(elen, e) {
+	  var Q = e[0];
 
-	    validation.type = type;
+	  for (var i = 1; i < elen; i++) {
+	    Q += e[i];
+	  }
 
-	    return validation;
+	  return Q;
+	}
+	function vec(n) {
+	  return new Float64Array(n);
 	}
 
-	// remove spaces, punctuation, diacritics
-	var simplify = function (str) {
-	  return diacritics.remove(
-	    str
-	      .replace(/&/g, 'and')
-	      .replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u2016\u2017\u2020-\u2027\u2030-\u2038\u203b-\u203e\u2041-\u2043\u2047-\u2051\u2053\u2055-\u205e\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00\u2e01\u2e06-\u2e08\u2e0b\u2e0e-\u2e16\u2e18\u2e19\u2e1b\u2e1e\u2e1f\u2e2a-\u2e2e\u2e30-\u2e39\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g,'')
-	      .toLowerCase()
-	  );
-	};
+	var ccwerrboundA = (3 + 16 * epsilon$1) * epsilon$1;
+	var ccwerrboundB = (2 + 12 * epsilon$1) * epsilon$1;
+	var ccwerrboundC = (9 + 64 * epsilon$1) * epsilon$1 * epsilon$1;
+	var B = vec(4);
+	var C1 = vec(8);
+	var C2 = vec(12);
+	var D = vec(16);
+	var u = vec(4);
 
-	// toParts - split a name-suggestion-index key into parts
-	// {
-	//   kvnd:        "amenity/fast_food|Thaï Express~(North America)",
-	//   kvn:         "amenity/fast_food|Thaï Express",
-	//   kv:          "amenity/fast_food",
-	//   k:           "amenity",
-	//   v:           "fast_food",
-	//   n:           "Thaï Express",
-	//   d:           "(North America)",
-	//   nsimple:     "thaiexpress",
-	//   kvnnsimple:  "amenity/fast_food|thaiexpress"
-	// }
-	var to_parts = function (kvnd) {
-	  var parts = {};
-	  parts.kvnd = kvnd;
+	function orient2dadapt(ax, ay, bx, by, cx, cy, detsum) {
+	  var acxtail, acytail, bcxtail, bcytail;
+
+	  var bvirt, c, ahi, alo, bhi, blo, _i, _j, _0, s1, s0, t1, t0, u3;
+
+	  var acx = ax - cx;
+	  var bcx = bx - cx;
+	  var acy = ay - cy;
+	  var bcy = by - cy;
+	  s1 = acx * bcy;
+	  c = splitter * acx;
+	  ahi = c - (c - acx);
+	  alo = acx - ahi;
+	  c = splitter * bcy;
+	  bhi = c - (c - bcy);
+	  blo = bcy - bhi;
+	  s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
+	  t1 = acy * bcx;
+	  c = splitter * acy;
+	  ahi = c - (c - acy);
+	  alo = acy - ahi;
+	  c = splitter * bcx;
+	  bhi = c - (c - bcx);
+	  blo = bcx - bhi;
+	  t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
+	  _i = s0 - t0;
+	  bvirt = s0 - _i;
+	  B[0] = s0 - (_i + bvirt) + (bvirt - t0);
+	  _j = s1 + _i;
+	  bvirt = _j - s1;
+	  _0 = s1 - (_j - bvirt) + (_i - bvirt);
+	  _i = _0 - t1;
+	  bvirt = _0 - _i;
+	  B[1] = _0 - (_i + bvirt) + (bvirt - t1);
+	  u3 = _j + _i;
+	  bvirt = u3 - _j;
+	  B[2] = _j - (u3 - bvirt) + (_i - bvirt);
+	  B[3] = u3;
+	  var det = estimate(4, B);
+	  var errbound = ccwerrboundB * detsum;
 
-	  var kvndparts = kvnd.split('~', 2);
-	  if (kvndparts.length > 1) { parts.d = kvndparts[1]; }
+	  if (det >= errbound || -det >= errbound) {
+	    return det;
+	  }
+
+	  bvirt = ax - acx;
+	  acxtail = ax - (acx + bvirt) + (bvirt - cx);
+	  bvirt = bx - bcx;
+	  bcxtail = bx - (bcx + bvirt) + (bvirt - cx);
+	  bvirt = ay - acy;
+	  acytail = ay - (acy + bvirt) + (bvirt - cy);
+	  bvirt = by - bcy;
+	  bcytail = by - (bcy + bvirt) + (bvirt - cy);
+
+	  if (acxtail === 0 && acytail === 0 && bcxtail === 0 && bcytail === 0) {
+	    return det;
+	  }
+
+	  errbound = ccwerrboundC * detsum + resulterrbound * Math.abs(det);
+	  det += acx * bcytail + bcy * acxtail - (acy * bcxtail + bcx * acytail);
+	  if (det >= errbound || -det >= errbound) return det;
+	  s1 = acxtail * bcy;
+	  c = splitter * acxtail;
+	  ahi = c - (c - acxtail);
+	  alo = acxtail - ahi;
+	  c = splitter * bcy;
+	  bhi = c - (c - bcy);
+	  blo = bcy - bhi;
+	  s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
+	  t1 = acytail * bcx;
+	  c = splitter * acytail;
+	  ahi = c - (c - acytail);
+	  alo = acytail - ahi;
+	  c = splitter * bcx;
+	  bhi = c - (c - bcx);
+	  blo = bcx - bhi;
+	  t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
+	  _i = s0 - t0;
+	  bvirt = s0 - _i;
+	  u[0] = s0 - (_i + bvirt) + (bvirt - t0);
+	  _j = s1 + _i;
+	  bvirt = _j - s1;
+	  _0 = s1 - (_j - bvirt) + (_i - bvirt);
+	  _i = _0 - t1;
+	  bvirt = _0 - _i;
+	  u[1] = _0 - (_i + bvirt) + (bvirt - t1);
+	  u3 = _j + _i;
+	  bvirt = u3 - _j;
+	  u[2] = _j - (u3 - bvirt) + (_i - bvirt);
+	  u[3] = u3;
+	  var C1len = sum(4, B, 4, u, C1);
+	  s1 = acx * bcytail;
+	  c = splitter * acx;
+	  ahi = c - (c - acx);
+	  alo = acx - ahi;
+	  c = splitter * bcytail;
+	  bhi = c - (c - bcytail);
+	  blo = bcytail - bhi;
+	  s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
+	  t1 = acy * bcxtail;
+	  c = splitter * acy;
+	  ahi = c - (c - acy);
+	  alo = acy - ahi;
+	  c = splitter * bcxtail;
+	  bhi = c - (c - bcxtail);
+	  blo = bcxtail - bhi;
+	  t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
+	  _i = s0 - t0;
+	  bvirt = s0 - _i;
+	  u[0] = s0 - (_i + bvirt) + (bvirt - t0);
+	  _j = s1 + _i;
+	  bvirt = _j - s1;
+	  _0 = s1 - (_j - bvirt) + (_i - bvirt);
+	  _i = _0 - t1;
+	  bvirt = _0 - _i;
+	  u[1] = _0 - (_i + bvirt) + (bvirt - t1);
+	  u3 = _j + _i;
+	  bvirt = u3 - _j;
+	  u[2] = _j - (u3 - bvirt) + (_i - bvirt);
+	  u[3] = u3;
+	  var C2len = sum(C1len, C1, 4, u, C2);
+	  s1 = acxtail * bcytail;
+	  c = splitter * acxtail;
+	  ahi = c - (c - acxtail);
+	  alo = acxtail - ahi;
+	  c = splitter * bcytail;
+	  bhi = c - (c - bcytail);
+	  blo = bcytail - bhi;
+	  s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
+	  t1 = acytail * bcxtail;
+	  c = splitter * acytail;
+	  ahi = c - (c - acytail);
+	  alo = acytail - ahi;
+	  c = splitter * bcxtail;
+	  bhi = c - (c - bcxtail);
+	  blo = bcxtail - bhi;
+	  t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
+	  _i = s0 - t0;
+	  bvirt = s0 - _i;
+	  u[0] = s0 - (_i + bvirt) + (bvirt - t0);
+	  _j = s1 + _i;
+	  bvirt = _j - s1;
+	  _0 = s1 - (_j - bvirt) + (_i - bvirt);
+	  _i = _0 - t1;
+	  bvirt = _0 - _i;
+	  u[1] = _0 - (_i + bvirt) + (bvirt - t1);
+	  u3 = _j + _i;
+	  bvirt = u3 - _j;
+	  u[2] = _j - (u3 - bvirt) + (_i - bvirt);
+	  u[3] = u3;
+	  var Dlen = sum(C2len, C2, 4, u, D);
+	  return D[Dlen - 1];
+	}
+
+	function orient2d(ax, ay, bx, by, cx, cy) {
+	  var detleft = (ay - cy) * (bx - cx);
+	  var detright = (ax - cx) * (by - cy);
+	  var det = detleft - detright;
+	  if (detleft === 0 || detright === 0 || detleft > 0 !== detright > 0) return det;
+	  var detsum = Math.abs(detleft + detright);
+	  if (Math.abs(det) >= ccwerrboundA * detsum) return det;
+	  return -orient2dadapt(ax, ay, bx, by, cx, cy, detsum);
+	}
+
+	/**
+	 * Signed area of the triangle (p0, p1, p2)
+	 * @param  {Array.<Number>} p0
+	 * @param  {Array.<Number>} p1
+	 * @param  {Array.<Number>} p2
+	 * @return {Number}
+	 */
+
+	function signedArea(p0, p1, p2) {
+	  var res = orient2d(p0[0], p0[1], p1[0], p1[1], p2[0], p2[1]);
+	  if (res > 0) return -1;
+	  if (res < 0) return 1;
+	  return 0;
+	}
 
-	  parts.kvn = kvndparts[0];
-	  var kvnparts = parts.kvn.split('|', 2);
-	  if (kvnparts.length > 1) { parts.n = kvnparts[1]; }
+	/**
+	 * @param  {SweepEvent} e1
+	 * @param  {SweepEvent} e2
+	 * @return {Number}
+	 */
 
-	  parts.kv = kvnparts[0];
-	  var kvparts = parts.kv.split('/', 2);
-	  parts.k = kvparts[0];
-	  parts.v = kvparts[1];
+	function compareEvents(e1, e2) {
+	  var p1 = e1.point;
+	  var p2 = e2.point; // Different x-coordinate
 
-	  parts.nsimple = simplify(parts.n);
-	  parts.kvnsimple = parts.kv + '|' + parts.nsimple;
-	  return parts;
-	};
+	  if (p1[0] > p2[0]) return 1;
+	  if (p1[0] < p2[0]) return -1; // Different points, but same x-coordinate
+	  // Event with lower y-coordinate is processed first
 
-	var matchGroups = {adult_gaming_centre:["amenity/casino","amenity/gambling","leisure/adult_gaming_centre"],beauty:["shop/beauty","shop/hairdresser_supply"],bed:["shop/bed","shop/furniture"],beverages:["shop/alcohol","shop/beverages"],camping:["leisure/park","tourism/camp_site","tourism/caravan_site"],car_parts:["shop/car_parts","shop/car_repair","shop/tires","shop/tyres"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/newsagent"],coworking:["amenity/coworking_space","office/coworking","office/coworking_space"],electronics:["office/telecommunication","shop/computer","shop/electronics","shop/hifi","shop/mobile","shop/mobile_phone","shop/telecommunication"],fashion:["shop/accessories","shop/bag","shop/botique","shop/clothes","shop/department_store","shop/fashion","shop/fashion_accessories","shop/sports","shop/shoes"],financial:["amenity/bank","office/accountant","office/financial","office/financial_advisor","office/tax_advisor","shop/tax"],fitness:["leisure/fitness_centre","leisure/fitness_center","leisure/sports_centre","leisure/sports_center"],food:["amenity/cafe","amenity/fast_food","amenity/ice_cream","amenity/restaurant","shop/bakery","shop/ice_cream","shop/pastry","shop/tea","shop/coffee"],fuel:["amenity/fuel","shop/gas","shop/convenience;gas","shop/gas;convenience"],gift:["shop/gift","shop/card","shop/cards","shop/stationery"],hardware:["shop/carpet","shop/diy","shop/doityourself","shop/doors","shop/electrical","shop/flooring","shop/hardware","shop/power_tools","shop/tool_hire","shop/tools","shop/trade"],health_food:["shop/health","shop/health_food","shop/herbalist","shop/nutrition_supplements"],houseware:["shop/houseware","shop/interior_decoration"],lodging:["tourism/hotel","tourism/motel"],money_transfer:["amenity/money_transfer","shop/money_transfer"],outdoor:["shop/outdoor","shop/sports"],rental:["amenity/bicycle_rental","amenity/boat_rental","amenity/car_rental","amenity/truck_rental","amenity/vehicle_rental","shop/rental"],school:["amenity/childcare","amenity/college","amenity/kindergarten","amenity/language_school","amenity/prep_school","amenity/school","amenity/university"],supermarket:["shop/food","shop/frozen_food","shop/greengrocer","shop/grocery","shop/supermarket","shop/wholesale"],variety_store:["shop/variety_store","shop/supermarket","shop/discount","shop/convenience"],vending:["amenity/vending_machine","shop/vending_machine"],wholesale:["shop/wholesale","shop/supermarket","shop/department_store"]};
-	var match_groups = {
-	matchGroups: matchGroups
-	};
+	  if (p1[1] !== p2[1]) return p1[1] > p2[1] ? 1 : -1;
+	  return specialCases(e1, e2, p1);
+	}
+	/* eslint-disable no-unused-vars */
 
-	var match_groups$1 = /*#__PURE__*/Object.freeze({
-		__proto__: null,
-		matchGroups: matchGroups,
-		'default': match_groups
-	});
+	function specialCases(e1, e2, p1, p2) {
+	  // Same coordinates, but one is a left endpoint and the other is
+	  // a right endpoint. The right endpoint is processed first
+	  if (e1.left !== e2.left) return e1.left ? 1 : -1; // const p2 = e1.otherEvent.point, p3 = e2.otherEvent.point;
+	  // const sa = (p1[0] - p3[0]) * (p2[1] - p3[1]) - (p2[0] - p3[0]) * (p1[1] - p3[1])
+	  // Same coordinates, both events
+	  // are left endpoints or right endpoints.
+	  // not collinear
 
-	var require$$0 = getCjsExportFromNamespace(match_groups$1);
+	  if (signedArea(p1, e1.otherEvent.point, e2.otherEvent.point) !== 0) {
+	    // the event associate to the bottom segment is processed first
+	    return !e1.isBelow(e2.otherEvent.point) ? 1 : -1;
+	  }
 
-	var matchGroups$1 = require$$0.matchGroups;
+	  return !e1.isSubject && e2.isSubject ? 1 : -1;
+	}
+	/* eslint-enable no-unused-vars */
 
+	/**
+	 * @param  {SweepEvent} se
+	 * @param  {Array.<Number>} p
+	 * @param  {Queue} queue
+	 * @return {Queue}
+	 */
 
-	var matcher$1 = function () {
-	  var _warnings = [];  // array of match conflict pairs
-	  var _ambiguous = {};
-	  var _matchIndex = {};
-	  var matcher = {};
+	function divideSegment(se, p, queue) {
+	  var r = new SweepEvent(p, false, se, se.isSubject);
+	  var l = new SweepEvent(p, true, se.otherEvent, se.isSubject);
+	  /* eslint-disable no-console */
 
+	  if (equals(se.point, se.otherEvent.point)) {
+	    console.warn('what is that, a collapsed segment?', se);
+	  }
+	  /* eslint-enable no-console */
 
-	  // Create an index of all the keys/simplenames for fast matching
-	  matcher.buildMatchIndex = function (brands) {
-	    // two passes - once for primary names, once for secondary/alternate names
-	    Object.keys(brands).forEach(function (kvnd) { return insertNames(kvnd, 'primary'); });
-	    Object.keys(brands).forEach(function (kvnd) { return insertNames(kvnd, 'secondary'); });
 
+	  r.contourId = l.contourId = se.contourId; // avoid a rounding error. The left event would be processed after the right event
 
-	    function insertNames(kvnd, which) {
-	      var obj = brands[kvnd];
-	      var parts = to_parts(kvnd);
+	  if (compareEvents(l, se.otherEvent) > 0) {
+	    se.otherEvent.left = true;
+	    l.left = false;
+	  } // avoid a rounding error. The left event would be processed after the right event
+	  // if (compareEvents(se, r) > 0) {}
 
-	      // Exit early for ambiguous names in the second pass.
-	      // They were collected in the first pass and we don't gather alt names for them.
-	      if (which === 'secondary' && parts.d) { return; }
 
+	  se.otherEvent.otherEvent = l;
+	  se.otherEvent = r;
+	  queue.push(l);
+	  queue.push(r);
+	  return queue;
+	}
 
-	      if (obj.countryCodes) {
-	        parts.countryCodes = obj.countryCodes.slice();  // copy
-	      }
+	//const EPS = 1e-9;
 
-	      var nomatches = (obj.nomatch || []);
-	      if (nomatches.some(function (s) { return s === kvnd; })) {
-	        console.log(("WARNING match/nomatch conflict for " + kvnd));
-	        return;
-	      }
+	/**
+	 * Finds the magnitude of the cross product of two vectors (if we pretend
+	 * they're in three dimensions)
+	 *
+	 * @param {Object} a First vector
+	 * @param {Object} b Second vector
+	 * @private
+	 * @returns {Number} The magnitude of the cross product
+	 */
+	function crossProduct(a, b) {
+	  return a[0] * b[1] - a[1] * b[0];
+	}
+	/**
+	 * Finds the dot product of two vectors.
+	 *
+	 * @param {Object} a First vector
+	 * @param {Object} b Second vector
+	 * @private
+	 * @returns {Number} The dot product
+	 */
 
-	      var match_kv = [parts.kv]
-	        .concat(obj.matchTags || [])
-	        .concat([((parts.k) + "/yes"), "building/yes"])   // #3454 - match some generic tags
-	        .map(function (s) { return s.toLowerCase(); });
 
-	      var match_nsimple = [];
-	      if (which === 'primary') {
-	        match_nsimple = [parts.n]
-	          .concat(obj.matchNames || [])
-	          .concat(obj.tags.official_name || [])   // #2732 - match alternate names
-	          .map(simplify);
+	function dotProduct(a, b) {
+	  return a[0] * b[0] + a[1] * b[1];
+	}
+	/**
+	 * Finds the intersection (if any) between two line segments a and b, given the
+	 * line segments' end points a1, a2 and b1, b2.
+	 *
+	 * This algorithm is based on Schneider and Eberly.
+	 * http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf
+	 * Page 244.
+	 *
+	 * @param {Array.<Number>} a1 point of first line
+	 * @param {Array.<Number>} a2 point of first line
+	 * @param {Array.<Number>} b1 point of second line
+	 * @param {Array.<Number>} b2 point of second line
+	 * @param {Boolean=}       noEndpointTouch whether to skip single touchpoints
+	 *                                         (meaning connected segments) as
+	 *                                         intersections
+	 * @returns {Array.<Array.<Number>>|Null} If the lines intersect, the point of
+	 * intersection. If they overlap, the two end points of the overlapping segment.
+	 * Otherwise, null.
+	 */
 
-	      } else if (which === 'secondary') {
-	        match_nsimple = []
-	          .concat(obj.tags.alt_name || [])        // #2732 - match alternate names
-	          .concat(obj.tags.short_name || [])      // #2732 - match alternate names
-	          .map(simplify);
-	      }
 
-	      if (!match_nsimple.length) { return; }  // nothing to do
+	function intersection (a1, a2, b1, b2, noEndpointTouch) {
+	  // The algorithm expects our lines in the form P + sd, where P is a point,
+	  // s is on the interval [0, 1], and d is a vector.
+	  // We are passed two points. P can be the first point of each pair. The
+	  // vector, then, could be thought of as the distance (in x and y components)
+	  // from the first point to the second point.
+	  // So first, let's make our vectors:
+	  var va = [a2[0] - a1[0], a2[1] - a1[1]];
+	  var vb = [b2[0] - b1[0], b2[1] - b1[1]]; // We also define a function to convert back to regular point form:
 
-	      match_kv.forEach(function (kv) {
-	        match_nsimple.forEach(function (nsimple) {
-	          if (parts.d) {
-	            // Known ambiguous names with disambiguation string ~(USA) / ~(Canada)
-	            // FIXME: Name collisions will overwrite the initial entry (ok for now)
-	            if (!_ambiguous[kv]) { _ambiguous[kv] = {}; }
-	            _ambiguous[kv][nsimple] = parts;
+	  /* eslint-disable arrow-body-style */
 
-	          } else {
-	            // Names we mostly expect to be unique..
-	            if (!_matchIndex[kv]) { _matchIndex[kv] = {}; }
+	  function toPoint(p, s, d) {
+	    return [p[0] + s * d[0], p[1] + s * d[1]];
+	  }
+	  /* eslint-enable arrow-body-style */
+	  // The rest is pretty much a straight port of the algorithm.
 
-	            var m = _matchIndex[kv][nsimple];
-	            if (m) {  // There already is a match for this name, skip it
-	              // Warn if we detect collisions in a primary name.
-	              // Skip warning if a secondary name or a generic `*=yes` tag - #2972 / #3454
-	              if (which === 'primary' && !/\/yes$/.test(kv)) {
-	                _warnings.push([m.kvnd, (kvnd + " (" + kv + "/" + nsimple + ")")]);
-	              }
-	            } else {
-	              _matchIndex[kv][nsimple] = parts;   // insert
-	            }
-	          }
-	        });
-	      });
 
-	    }
-	  };
+	  var e = [b1[0] - a1[0], b1[1] - a1[1]];
+	  var kross = crossProduct(va, vb);
+	  var sqrKross = kross * kross;
+	  var sqrLenA = dotProduct(va, va); //const sqrLenB  = dotProduct(vb, vb);
+	  // Check for line intersection. This works because of the properties of the
+	  // cross product -- specifically, two vectors are parallel if and only if the
+	  // cross product is the 0 vector. The full calculation involves relative error
+	  // to account for possible very small line segments. See Schneider & Eberly
+	  // for details.
 
+	  if (sqrKross > 0
+	  /* EPS * sqrLenB * sqLenA */
+	  ) {
+	      // If they're not parallel, then (because these are line segments) they
+	      // still might not actually intersect. This code checks that the
+	      // intersection point of the lines is actually on both line segments.
+	      var s = crossProduct(e, vb) / kross;
 
-	  // pass a `key`, `value`, `name` and return the best match,
-	  // `countryCode` optional (if supplied, must match that too)
-	  matcher.matchKVN = function (key, value, name, countryCode) {
-	    return matcher.matchParts(to_parts((key + "/" + value + "|" + name)), countryCode);
-	  };
+	      if (s < 0 || s > 1) {
+	        // not on line segment a
+	        return null;
+	      }
 
+	      var t = crossProduct(e, va) / kross;
 
-	  // pass a parts object and return the best match,
-	  // `countryCode` optional (if supplied, must match that too)
-	  matcher.matchParts = function (parts, countryCode) {
-	    var match = null;
-	    var inGroup = false;
+	      if (t < 0 || t > 1) {
+	        // not on line segment b
+	        return null;
+	      }
 
-	    // fixme: we currently return a single match for ambiguous
-	    match = _ambiguous[parts.kv] && _ambiguous[parts.kv][parts.nsimple];
-	    if (match && matchesCountryCode(match)) { return match; }
+	      if (s === 0 || s === 1) {
+	        // on an endpoint of line segment a
+	        return noEndpointTouch ? null : [toPoint(a1, s, va)];
+	      }
 
-	    // try to return an exact match
-	    match = _matchIndex[parts.kv] && _matchIndex[parts.kv][parts.nsimple];
-	    if (match && matchesCountryCode(match)) { return match; }
+	      if (t === 0 || t === 1) {
+	        // on an endpoint of line segment b
+	        return noEndpointTouch ? null : [toPoint(b1, t, vb)];
+	      }
 
-	    // look in match groups
-	    for (var mg in matchGroups$1) {
-	      var matchGroup = matchGroups$1[mg];
-	      match = null;
-	      inGroup = false;
+	      return [toPoint(a1, s, va)];
+	    } // If we've reached this point, then the lines are either parallel or the
+	  // same, but the segments could overlap partially or fully, or not at all.
+	  // So we need to find the overlap, if any. To do that, we can use e, which is
+	  // the (vector) difference between the two initial points. If this is parallel
+	  // with the line itself, then the two lines are the same line, and there will
+	  // be overlap.
+	  //const sqrLenE = dotProduct(e, e);
 
-	      for (var i = 0; i < matchGroup.length; i++) {
-	        var otherkv = matchGroup[i].toLowerCase();
-	        if (!inGroup) {
-	          inGroup = otherkv === parts.kv;
-	        }
-	        if (!match) {
-	          // fixme: we currently return a single match for ambiguous
-	          match = _ambiguous[otherkv] && _ambiguous[otherkv][parts.nsimple];
-	        }
-	        if (!match) {
-	          match = _matchIndex[otherkv] && _matchIndex[otherkv][parts.nsimple];
-	        }
 
-	        if (match && !matchesCountryCode(match)) {
-	          match = null;
-	        }
+	  kross = crossProduct(e, va);
+	  sqrKross = kross * kross;
 
-	        if (inGroup && match) {
-	          return match;
-	        }
-	      }
+	  if (sqrKross > 0
+	  /* EPS * sqLenB * sqLenE */
+	  ) {
+	      // Lines are just parallel, not the same. No overlap.
+	      return null;
 	    }
 
-	    return null;
+	  var sa = dotProduct(va, e) / sqrLenA;
+	  var sb = sa + dotProduct(va, vb) / sqrLenA;
+	  var smin = Math.min(sa, sb);
+	  var smax = Math.max(sa, sb); // this is, essentially, the FindIntersection acting on floats from
+	  // Schneider & Eberly, just inlined into this function.
 
-	    function matchesCountryCode(match) {
-	      if (!countryCode) { return true; }
-	      if (!match.countryCodes) { return true; }
-	      return match.countryCodes.indexOf(countryCode) !== -1;
+	  if (smin <= 1 && smax >= 0) {
+	    // overlap on an end point
+	    if (smin === 1) {
+	      return noEndpointTouch ? null : [toPoint(a1, smin > 0 ? smin : 0, va)];
 	    }
-	  };
 
+	    if (smax === 0) {
+	      return noEndpointTouch ? null : [toPoint(a1, smax < 1 ? smax : 1, va)];
+	    }
 
-	  matcher.getWarnings = function () { return _warnings; };
+	    if (noEndpointTouch && smin === 0 && smax === 1) return null; // There's overlap on a segment -- two points of intersection. Return both.
 
-	  return matcher;
-	};
+	    return [toPoint(a1, smin > 0 ? smin : 0, va), toPoint(a1, smax < 1 ? smax : 1, va)];
+	  }
 
-	var quickselect$1 = createCommonjsModule(function (module, exports) {
-	(function (global, factory) {
-		 module.exports = factory() ;
-	}(commonjsGlobal, (function () {
-	function quickselect(arr, k, left, right, compare) {
-	    quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);
+	  return null;
 	}
 
-	function quickselectStep(arr, k, left, right, compare) {
+	/**
+	 * @param  {SweepEvent} se1
+	 * @param  {SweepEvent} se2
+	 * @param  {Queue}      queue
+	 * @return {Number}
+	 */
 
-	    while (right > left) {
-	        if (right - left > 600) {
-	            var n = right - left + 1;
-	            var m = k - left + 1;
-	            var z = Math.log(n);
-	            var s = 0.5 * Math.exp(2 * z / 3);
-	            var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
-	            var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
-	            var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
-	            quickselectStep(arr, k, newLeft, newRight, compare);
-	        }
+	function possibleIntersection(se1, se2, queue) {
+	  // that disallows self-intersecting polygons,
+	  // did cost us half a day, so I'll leave it
+	  // out of respect
+	  // if (se1.isSubject === se2.isSubject) return;
+	  var inter = intersection(se1.point, se1.otherEvent.point, se2.point, se2.otherEvent.point);
+	  var nintersections = inter ? inter.length : 0;
+	  if (nintersections === 0) return 0; // no intersection
+	  // the line segments intersect at an endpoint of both line segments
 
-	        var t = arr[k];
-	        var i = left;
-	        var j = right;
+	  if (nintersections === 1 && (equals(se1.point, se2.point) || equals(se1.otherEvent.point, se2.otherEvent.point))) {
+	    return 0;
+	  }
 
-	        swap(arr, left, k);
-	        if (compare(arr[right], t) > 0) { swap(arr, left, right); }
+	  if (nintersections === 2 && se1.isSubject === se2.isSubject) {
+	    // if(se1.contourId === se2.contourId){
+	    // console.warn('Edges of the same polygon overlap',
+	    //   se1.point, se1.otherEvent.point, se2.point, se2.otherEvent.point);
+	    // }
+	    //throw new Error('Edges of the same polygon overlap');
+	    return 0;
+	  } // The line segments associated to se1 and se2 intersect
 
-	        while (i < j) {
-	            swap(arr, i, j);
-	            i++;
-	            j--;
-	            while (compare(arr[i], t) < 0) { i++; }
-	            while (compare(arr[j], t) > 0) { j--; }
-	        }
 
-	        if (compare(arr[left], t) === 0) { swap(arr, left, j); }
-	        else {
-	            j++;
-	            swap(arr, j, right);
-	        }
+	  if (nintersections === 1) {
+	    // if the intersection point is not an endpoint of se1
+	    if (!equals(se1.point, inter[0]) && !equals(se1.otherEvent.point, inter[0])) {
+	      divideSegment(se1, inter[0], queue);
+	    } // if the intersection point is not an endpoint of se2
+
 
-	        if (j <= k) { left = j + 1; }
-	        if (k <= j) { right = j - 1; }
+	    if (!equals(se2.point, inter[0]) && !equals(se2.otherEvent.point, inter[0])) {
+	      divideSegment(se2, inter[0], queue);
 	    }
-	}
 
-	function swap(arr, i, j) {
-	    var tmp = arr[i];
-	    arr[i] = arr[j];
-	    arr[j] = tmp;
-	}
+	    return 1;
+	  } // The line segments associated to se1 and se2 overlap
 
-	function defaultCompare(a, b) {
-	    return a < b ? -1 : a > b ? 1 : 0;
-	}
 
-	return quickselect;
+	  var events = [];
+	  var leftCoincide = false;
+	  var rightCoincide = false;
 
-	})));
-	});
+	  if (equals(se1.point, se2.point)) {
+	    leftCoincide = true; // linked
+	  } else if (compareEvents(se1, se2) === 1) {
+	    events.push(se2, se1);
+	  } else {
+	    events.push(se1, se2);
+	  }
 
-	var rbush_1 = rbush;
-	var _default$2 = rbush;
+	  if (equals(se1.otherEvent.point, se2.otherEvent.point)) {
+	    rightCoincide = true;
+	  } else if (compareEvents(se1.otherEvent, se2.otherEvent) === 1) {
+	    events.push(se2.otherEvent, se1.otherEvent);
+	  } else {
+	    events.push(se1.otherEvent, se2.otherEvent);
+	  }
 
+	  if (leftCoincide && rightCoincide || leftCoincide) {
+	    // both line segments are equal or share the left endpoint
+	    se2.type = NON_CONTRIBUTING;
+	    se1.type = se2.inOut === se1.inOut ? SAME_TRANSITION : DIFFERENT_TRANSITION;
 
+	    if (leftCoincide && !rightCoincide) {
+	      // honestly no idea, but changing events selection from [2, 1]
+	      // to [0, 1] fixes the overlapping self-intersecting polygons issue
+	      divideSegment(events[1].otherEvent, events[0].point, queue);
+	    }
 
-	function rbush(maxEntries, format) {
-	    if (!(this instanceof rbush)) { return new rbush(maxEntries, format); }
+	    return 2;
+	  } // the line segments share the right endpoint
 
-	    // max entries in a node is 9 by default; min node fill is 40% for best performance
-	    this._maxEntries = Math.max(4, maxEntries || 9);
-	    this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
 
-	    if (format) {
-	        this._initFormat(format);
-	    }
+	  if (rightCoincide) {
+	    divideSegment(events[0], events[1].point, queue);
+	    return 3;
+	  } // no line segment includes totally the other one
 
-	    this.clear();
-	}
 
-	rbush.prototype = {
+	  if (events[0] !== events[3].otherEvent) {
+	    divideSegment(events[0], events[1].point, queue);
+	    divideSegment(events[1], events[2].point, queue);
+	    return 3;
+	  } // one line segment includes the other one
 
-	    all: function () {
-	        return this._all(this.data, []);
-	    },
 
-	    search: function (bbox) {
+	  divideSegment(events[0], events[1].point, queue);
+	  divideSegment(events[3].otherEvent, events[2].point, queue);
+	  return 3;
+	}
 
-	        var node = this.data,
-	            result = [],
-	            toBBox = this.toBBox;
+	/**
+	 * @param  {SweepEvent} le1
+	 * @param  {SweepEvent} le2
+	 * @return {Number}
+	 */
 
-	        if (!intersects$1(bbox, node)) { return result; }
+	function compareSegments(le1, le2) {
+	  if (le1 === le2) return 0; // Segments are not collinear
 
-	        var nodesToSearch = [],
-	            i, len, child, childBBox;
+	  if (signedArea(le1.point, le1.otherEvent.point, le2.point) !== 0 || signedArea(le1.point, le1.otherEvent.point, le2.otherEvent.point) !== 0) {
+	    // If they share their left endpoint use the right endpoint to sort
+	    if (equals(le1.point, le2.point)) return le1.isBelow(le2.otherEvent.point) ? -1 : 1; // Different left endpoint: use the left endpoint to sort
 
-	        while (node) {
-	            for (i = 0, len = node.children.length; i < len; i++) {
+	    if (le1.point[0] === le2.point[0]) return le1.point[1] < le2.point[1] ? -1 : 1; // has the line segment associated to e1 been inserted
+	    // into S after the line segment associated to e2 ?
 
-	                child = node.children[i];
-	                childBBox = node.leaf ? toBBox(child) : child;
+	    if (compareEvents(le1, le2) === 1) return le2.isAbove(le1.point) ? -1 : 1; // The line segment associated to e2 has been inserted
+	    // into S after the line segment associated to e1
 
-	                if (intersects$1(bbox, childBBox)) {
-	                    if (node.leaf) { result.push(child); }
-	                    else if (contains$2(bbox, childBBox)) { this._all(child, result); }
-	                    else { nodesToSearch.push(child); }
-	                }
-	            }
-	            node = nodesToSearch.pop();
-	        }
+	    return le1.isBelow(le2.point) ? -1 : 1;
+	  }
 
-	        return result;
-	    },
+	  if (le1.isSubject === le2.isSubject) {
+	    // same polygon
+	    var p1 = le1.point,
+	        p2 = le2.point;
 
-	    collides: function (bbox) {
+	    if (p1[0] === p2[0] && p1[1] === p2[1]
+	    /*equals(le1.point, le2.point)*/
+	    ) {
+	        p1 = le1.otherEvent.point;
+	        p2 = le2.otherEvent.point;
+	        if (p1[0] === p2[0] && p1[1] === p2[1]) return 0;else return le1.contourId > le2.contourId ? 1 : -1;
+	      }
+	  } else {
+	    // Segments are collinear, but belong to separate polygons
+	    return le1.isSubject ? -1 : 1;
+	  }
 
-	        var node = this.data,
-	            toBBox = this.toBBox;
+	  return compareEvents(le1, le2) === 1 ? 1 : -1;
+	}
 
-	        if (!intersects$1(bbox, node)) { return false; }
+	function subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation) {
+	  var sweepLine = new SplayTree(compareSegments);
+	  var sortedEvents = [];
+	  var rightbound = Math.min(sbbox[2], cbbox[2]);
+	  var prev, next, begin;
 
-	        var nodesToSearch = [],
-	            i, len, child, childBBox;
+	  while (eventQueue.length !== 0) {
+	    var event = eventQueue.pop();
+	    sortedEvents.push(event); // optimization by bboxes for intersection and difference goes here
 
-	        while (node) {
-	            for (i = 0, len = node.children.length; i < len; i++) {
+	    if (operation === INTERSECTION && event.point[0] > rightbound || operation === DIFFERENCE && event.point[0] > sbbox[2]) {
+	      break;
+	    }
 
-	                child = node.children[i];
-	                childBBox = node.leaf ? toBBox(child) : child;
+	    if (event.left) {
+	      next = prev = sweepLine.insert(event);
+	      begin = sweepLine.minNode();
+	      if (prev !== begin) prev = sweepLine.prev(prev);else prev = null;
+	      next = sweepLine.next(next);
+	      var prevEvent = prev ? prev.key : null;
+	      var prevprevEvent = void 0;
+	      computeFields(event, prevEvent, operation);
 
-	                if (intersects$1(bbox, childBBox)) {
-	                    if (node.leaf || contains$2(bbox, childBBox)) { return true; }
-	                    nodesToSearch.push(child);
-	                }
-	            }
-	            node = nodesToSearch.pop();
+	      if (next) {
+	        if (possibleIntersection(event, next.key, eventQueue) === 2) {
+	          computeFields(event, prevEvent, operation);
+	          computeFields(event, next.key, operation);
 	        }
+	      }
 
-	        return false;
-	    },
-
-	    load: function (data) {
-	        if (!(data && data.length)) { return this; }
-
-	        if (data.length < this._minEntries) {
-	            for (var i = 0, len = data.length; i < len; i++) {
-	                this.insert(data[i]);
-	            }
-	            return this;
+	      if (prev) {
+	        if (possibleIntersection(prev.key, event, eventQueue) === 2) {
+	          var prevprev = prev;
+	          if (prevprev !== begin) prevprev = sweepLine.prev(prevprev);else prevprev = null;
+	          prevprevEvent = prevprev ? prevprev.key : null;
+	          computeFields(prevEvent, prevprevEvent, operation);
+	          computeFields(event, prevEvent, operation);
 	        }
+	      }
+	    } else {
+	      event = event.otherEvent;
+	      next = prev = sweepLine.find(event);
 
-	        // recursively build the tree with the given data from scratch using OMT algorithm
-	        var node = this._build(data.slice(), 0, data.length - 1, 0);
+	      if (prev && next) {
+	        if (prev !== begin) prev = sweepLine.prev(prev);else prev = null;
+	        next = sweepLine.next(next);
+	        sweepLine.remove(event);
 
-	        if (!this.data.children.length) {
-	            // save as is if tree is empty
-	            this.data = node;
+	        if (next && prev) {
+	          possibleIntersection(prev.key, next.key, eventQueue);
+	        }
+	      }
+	    }
+	  }
 
-	        } else if (this.data.height === node.height) {
-	            // split root if trees have the same height
-	            this._splitRoot(this.data, node);
+	  return sortedEvents;
+	}
 
-	        } else {
-	            if (this.data.height < node.height) {
-	                // swap trees if inserted one is bigger
-	                var tmpNode = this.data;
-	                this.data = node;
-	                node = tmpNode;
-	            }
+	var Contour = /*#__PURE__*/function () {
+	  /**
+	   * Contour
+	   *
+	   * @class {Contour}
+	   */
+	  function Contour() {
+	    _classCallCheck(this, Contour);
 
-	            // insert the small tree into the large tree at appropriate level
-	            this._insert(node, this.data.height - node.height - 1, true);
-	        }
+	    this.points = [];
+	    this.holeIds = [];
+	    this.holeOf = null;
+	    this.depth = null;
+	  }
 
-	        return this;
-	    },
+	  _createClass(Contour, [{
+	    key: "isExterior",
+	    value: function isExterior() {
+	      return this.holeOf == null;
+	    }
+	  }]);
 
-	    insert: function (item) {
-	        if (item) { this._insert(item, this.data.height - 1); }
-	        return this;
-	    },
+	  return Contour;
+	}();
 
-	    clear: function () {
-	        this.data = createNode$1([]);
-	        return this;
-	    },
+	/**
+	 * @param  {Array.<SweepEvent>} sortedEvents
+	 * @return {Array.<SweepEvent>}
+	 */
 
-	    remove: function (item, equalsFn) {
-	        if (!item) { return this; }
+	function orderEvents(sortedEvents) {
+	  var event, i, len, tmp;
+	  var resultEvents = [];
 
-	        var node = this.data,
-	            bbox = this.toBBox(item),
-	            path = [],
-	            indexes = [],
-	            i, parent, index, goingUp;
+	  for (i = 0, len = sortedEvents.length; i < len; i++) {
+	    event = sortedEvents[i];
 
-	        // depth-first iterative tree traversal
-	        while (node || path.length) {
+	    if (event.left && event.inResult || !event.left && event.otherEvent.inResult) {
+	      resultEvents.push(event);
+	    }
+	  } // Due to overlapping edges the resultEvents array can be not wholly sorted
 
-	            if (!node) { // go up
-	                node = path.pop();
-	                parent = path[path.length - 1];
-	                i = indexes.pop();
-	                goingUp = true;
-	            }
 
-	            if (node.leaf) { // check current node
-	                index = findItem$1(item, node.children, equalsFn);
+	  var sorted = false;
 
-	                if (index !== -1) {
-	                    // item found, remove the item and condense tree upwards
-	                    node.children.splice(index, 1);
-	                    path.push(node);
-	                    this._condense(path);
-	                    return this;
-	                }
-	            }
+	  while (!sorted) {
+	    sorted = true;
 
-	            if (!goingUp && !node.leaf && contains$2(node, bbox)) { // go down
-	                path.push(node);
-	                indexes.push(i);
-	                i = 0;
-	                parent = node;
-	                node = node.children[0];
+	    for (i = 0, len = resultEvents.length; i < len; i++) {
+	      if (i + 1 < len && compareEvents(resultEvents[i], resultEvents[i + 1]) === 1) {
+	        tmp = resultEvents[i];
+	        resultEvents[i] = resultEvents[i + 1];
+	        resultEvents[i + 1] = tmp;
+	        sorted = false;
+	      }
+	    }
+	  }
 
-	            } else if (parent) { // go right
-	                i++;
-	                node = parent.children[i];
-	                goingUp = false;
+	  for (i = 0, len = resultEvents.length; i < len; i++) {
+	    event = resultEvents[i];
+	    event.otherPos = i;
+	  } // imagine, the right event is found in the beginning of the queue,
+	  // when his left counterpart is not marked yet
 
-	            } else { node = null; } // nothing found
-	        }
 
-	        return this;
-	    },
+	  for (i = 0, len = resultEvents.length; i < len; i++) {
+	    event = resultEvents[i];
 
-	    toBBox: function (item) { return item; },
+	    if (!event.left) {
+	      tmp = event.otherPos;
+	      event.otherPos = event.otherEvent.otherPos;
+	      event.otherEvent.otherPos = tmp;
+	    }
+	  }
 
-	    compareMinX: compareNodeMinX$1,
-	    compareMinY: compareNodeMinY$1,
+	  return resultEvents;
+	}
+	/**
+	 * @param  {Number} pos
+	 * @param  {Array.<SweepEvent>} resultEvents
+	 * @param  {Object>}    processed
+	 * @return {Number}
+	 */
 
-	    toJSON: function () { return this.data; },
 
-	    fromJSON: function (data) {
-	        this.data = data;
-	        return this;
-	    },
+	function nextPos(pos, resultEvents, processed, origPos) {
+	  var newPos = pos + 1,
+	      p = resultEvents[pos].point,
+	      p1;
+	  var length = resultEvents.length;
+	  if (newPos < length) p1 = resultEvents[newPos].point;
 
-	    _all: function (node, result) {
-	        var nodesToSearch = [];
-	        while (node) {
-	            if (node.leaf) { result.push.apply(result, node.children); }
-	            else { nodesToSearch.push.apply(nodesToSearch, node.children); }
+	  while (newPos < length && p1[0] === p[0] && p1[1] === p[1]) {
+	    if (!processed[newPos]) {
+	      return newPos;
+	    } else {
+	      newPos++;
+	    }
 
-	            node = nodesToSearch.pop();
-	        }
-	        return result;
-	    },
+	    p1 = resultEvents[newPos].point;
+	  }
 
-	    _build: function (items, left, right, height) {
+	  newPos = pos - 1;
 
-	        var N = right - left + 1,
-	            M = this._maxEntries,
-	            node;
+	  while (processed[newPos] && newPos > origPos) {
+	    newPos--;
+	  }
 
-	        if (N <= M) {
-	            // reached leaf level; return leaf
-	            node = createNode$1(items.slice(left, right + 1));
-	            calcBBox$1(node, this.toBBox);
-	            return node;
-	        }
+	  return newPos;
+	}
 
-	        if (!height) {
-	            // target height of the bulk-loaded tree
-	            height = Math.ceil(Math.log(N) / Math.log(M));
+	function initializeContourFromContext(event, contours, contourId) {
+	  var contour = new Contour();
 
-	            // target number of root entries to maximize storage utilization
-	            M = Math.ceil(N / Math.pow(M, height - 1));
-	        }
+	  if (event.prevInResult != null) {
+	    var prevInResult = event.prevInResult; // Note that it is valid to query the "previous in result" for its output contour id,
+	    // because we must have already processed it (i.e., assigned an output contour id)
+	    // in an earlier iteration, otherwise it wouldn't be possible that it is "previous in
+	    // result".
 
-	        node = createNode$1([]);
-	        node.leaf = false;
-	        node.height = height;
+	    var lowerContourId = prevInResult.outputContourId;
+	    var lowerResultTransition = prevInResult.resultTransition;
 
-	        // split the items into M mostly square tiles
+	    if (lowerResultTransition > 0) {
+	      // We are inside. Now we have to check if the thing below us is another hole or
+	      // an exterior contour.
+	      var lowerContour = contours[lowerContourId];
 
-	        var N2 = Math.ceil(N / M),
-	            N1 = N2 * Math.ceil(Math.sqrt(M)),
-	            i, j, right2, right3;
+	      if (lowerContour.holeOf != null) {
+	        // The lower contour is a hole => Connect the new contour as a hole to its parent,
+	        // and use same depth.
+	        var parentContourId = lowerContour.holeOf;
+	        contours[parentContourId].holeIds.push(contourId);
+	        contour.holeOf = parentContourId;
+	        contour.depth = contours[lowerContourId].depth;
+	      } else {
+	        // The lower contour is an exterior contour => Connect the new contour as a hole,
+	        // and increment depth.
+	        contours[lowerContourId].holeIds.push(contourId);
+	        contour.holeOf = lowerContourId;
+	        contour.depth = contours[lowerContourId].depth + 1;
+	      }
+	    } else {
+	      // We are outside => this contour is an exterior contour of same depth.
+	      contour.holeOf = null;
+	      contour.depth = contours[lowerContourId].depth;
+	    }
+	  } else {
+	    // There is no lower/previous contour => this contour is an exterior contour of depth 0.
+	    contour.holeOf = null;
+	    contour.depth = 0;
+	  }
 
-	        multiSelect$1(items, left, right, N1, this.compareMinX);
+	  return contour;
+	}
+	/**
+	 * @param  {Array.<SweepEvent>} sortedEvents
+	 * @return {Array.<*>} polygons
+	 */
 
-	        for (i = left; i <= right; i += N1) {
 
-	            right2 = Math.min(i + N1 - 1, right);
+	function connectEdges(sortedEvents) {
+	  var i, len;
+	  var resultEvents = orderEvents(sortedEvents); // "false"-filled array
 
-	            multiSelect$1(items, i, right2, N2, this.compareMinY);
+	  var processed = {};
+	  var contours = [];
 
-	            for (j = i; j <= right2; j += N2) {
+	  var _loop = function _loop() {
+	    if (processed[i]) {
+	      return "continue";
+	    }
 
-	                right3 = Math.min(j + N2 - 1, right2);
+	    var contourId = contours.length;
+	    var contour = initializeContourFromContext(resultEvents[i], contours, contourId); // Helper function that combines marking an event as processed with assigning its output contour ID
 
-	                // pack each entry recursively
-	                node.children.push(this._build(items, j, right3, height - 1));
-	            }
-	        }
+	    var markAsProcessed = function markAsProcessed(pos) {
+	      processed[pos] = true;
+	      resultEvents[pos].outputContourId = contourId;
+	    };
 
-	        calcBBox$1(node, this.toBBox);
+	    var pos = i;
+	    var origPos = i;
+	    var initial = resultEvents[i].point;
+	    contour.points.push(initial);
+	    /* eslint no-constant-condition: "off" */
 
-	        return node;
-	    },
+	    while (true) {
+	      markAsProcessed(pos);
+	      pos = resultEvents[pos].otherPos;
+	      markAsProcessed(pos);
+	      contour.points.push(resultEvents[pos].point);
+	      pos = nextPos(pos, resultEvents, processed, origPos);
 
-	    _chooseSubtree: function (bbox, node, level, path) {
+	      if (pos == origPos) {
+	        break;
+	      }
+	    }
 
-	        var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
+	    contours.push(contour);
+	  };
 
-	        while (true) {
-	            path.push(node);
+	  for (i = 0, len = resultEvents.length; i < len; i++) {
+	    var _ret = _loop();
 
-	            if (node.leaf || path.length - 1 === level) { break; }
+	    if (_ret === "continue") continue;
+	  }
 
-	            minArea = minEnlargement = Infinity;
+	  return contours;
+	}
 
-	            for (i = 0, len = node.children.length; i < len; i++) {
-	                child = node.children[i];
-	                area = bboxArea$1(child);
-	                enlargement = enlargedArea$1(bbox, child) - area;
+	var tinyqueue = TinyQueue;
+	var _default$1 = TinyQueue;
 
-	                // choose entry with the least area enlargement
-	                if (enlargement < minEnlargement) {
-	                    minEnlargement = enlargement;
-	                    minArea = area < minArea ? area : minArea;
-	                    targetNode = child;
+	function TinyQueue(data, compare) {
+	  if (!(this instanceof TinyQueue)) return new TinyQueue(data, compare);
+	  this.data = data || [];
+	  this.length = this.data.length;
+	  this.compare = compare || defaultCompare$1;
 
-	                } else if (enlargement === minEnlargement) {
-	                    // otherwise choose one with the smallest area
-	                    if (area < minArea) {
-	                        minArea = area;
-	                        targetNode = child;
-	                    }
-	                }
-	            }
+	  if (this.length > 0) {
+	    for (var i = (this.length >> 1) - 1; i >= 0; i--) {
+	      this._down(i);
+	    }
+	  }
+	}
 
-	            node = targetNode || node.children[0];
-	        }
+	function defaultCompare$1(a, b) {
+	  return a < b ? -1 : a > b ? 1 : 0;
+	}
 
-	        return node;
-	    },
+	TinyQueue.prototype = {
+	  push: function push(item) {
+	    this.data.push(item);
+	    this.length++;
 
-	    _insert: function (item, level, isNode) {
+	    this._up(this.length - 1);
+	  },
+	  pop: function pop() {
+	    if (this.length === 0) return undefined;
+	    var top = this.data[0];
+	    this.length--;
 
-	        var toBBox = this.toBBox,
-	            bbox = isNode ? item : toBBox(item),
-	            insertPath = [];
+	    if (this.length > 0) {
+	      this.data[0] = this.data[this.length];
 
-	        // find the best node for accommodating the item, saving all nodes along the path too
-	        var node = this._chooseSubtree(bbox, this.data, level, insertPath);
+	      this._down(0);
+	    }
 
-	        // put the item into the node
-	        node.children.push(item);
-	        extend$3(node, bbox);
+	    this.data.pop();
+	    return top;
+	  },
+	  peek: function peek() {
+	    return this.data[0];
+	  },
+	  _up: function _up(pos) {
+	    var data = this.data;
+	    var compare = this.compare;
+	    var item = data[pos];
 
-	        // split on node overflow; propagate upwards if necessary
-	        while (level >= 0) {
-	            if (insertPath[level].children.length > this._maxEntries) {
-	                this._split(insertPath, level);
-	                level--;
-	            } else { break; }
-	        }
+	    while (pos > 0) {
+	      var parent = pos - 1 >> 1;
+	      var current = data[parent];
+	      if (compare(item, current) >= 0) break;
+	      data[pos] = current;
+	      pos = parent;
+	    }
 
-	        // adjust bboxes along the insertion path
-	        this._adjustParentBBoxes(bbox, insertPath, level);
-	    },
+	    data[pos] = item;
+	  },
+	  _down: function _down(pos) {
+	    var data = this.data;
+	    var compare = this.compare;
+	    var halfLength = this.length >> 1;
+	    var item = data[pos];
+
+	    while (pos < halfLength) {
+	      var left = (pos << 1) + 1;
+	      var right = left + 1;
+	      var best = data[left];
+
+	      if (right < this.length && compare(data[right], best) < 0) {
+	        left = right;
+	        best = data[right];
+	      }
 
-	    // split overflowed node into two
-	    _split: function (insertPath, level) {
+	      if (compare(best, item) >= 0) break;
+	      data[pos] = best;
+	      pos = left;
+	    }
 
-	        var node = insertPath[level],
-	            M = node.children.length,
-	            m = this._minEntries;
+	    data[pos] = item;
+	  }
+	};
+	tinyqueue["default"] = _default$1;
 
-	        this._chooseSplitAxis(node, m, M);
+	var max$5 = Math.max;
+	var min$a = Math.min;
+	var contourId = 0;
 
-	        var splitIndex = this._chooseSplitIndex(node, m, M);
+	function processPolygon(contourOrHole, isSubject, depth, Q, bbox, isExteriorRing) {
+	  var i, len, s1, s2, e1, e2;
 
-	        var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
-	        newNode.height = node.height;
-	        newNode.leaf = node.leaf;
+	  for (i = 0, len = contourOrHole.length - 1; i < len; i++) {
+	    s1 = contourOrHole[i];
+	    s2 = contourOrHole[i + 1];
+	    e1 = new SweepEvent(s1, false, undefined, isSubject);
+	    e2 = new SweepEvent(s2, false, e1, isSubject);
+	    e1.otherEvent = e2;
 
-	        calcBBox$1(node, this.toBBox);
-	        calcBBox$1(newNode, this.toBBox);
+	    if (s1[0] === s2[0] && s1[1] === s2[1]) {
+	      continue; // skip collapsed edges, or it breaks
+	    }
 
-	        if (level) { insertPath[level - 1].children.push(newNode); }
-	        else { this._splitRoot(node, newNode); }
-	    },
+	    e1.contourId = e2.contourId = depth;
 
-	    _splitRoot: function (node, newNode) {
-	        // split root node
-	        this.data = createNode$1([node, newNode]);
-	        this.data.height = node.height + 1;
-	        this.data.leaf = false;
-	        calcBBox$1(this.data, this.toBBox);
-	    },
+	    if (!isExteriorRing) {
+	      e1.isExteriorRing = false;
+	      e2.isExteriorRing = false;
+	    }
 
-	    _chooseSplitIndex: function (node, m, M) {
+	    if (compareEvents(e1, e2) > 0) {
+	      e2.left = true;
+	    } else {
+	      e1.left = true;
+	    }
 
-	        var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
+	    var x = s1[0],
+	        y = s1[1];
+	    bbox[0] = min$a(bbox[0], x);
+	    bbox[1] = min$a(bbox[1], y);
+	    bbox[2] = max$5(bbox[2], x);
+	    bbox[3] = max$5(bbox[3], y); // Pushing it so the queue is sorted from left to right,
+	    // with object on the left having the highest priority.
 
-	        minOverlap = minArea = Infinity;
+	    Q.push(e1);
+	    Q.push(e2);
+	  }
+	}
 
-	        for (i = m; i <= M - m; i++) {
-	            bbox1 = distBBox$1(node, 0, i, this.toBBox);
-	            bbox2 = distBBox$1(node, i, M, this.toBBox);
+	function fillQueue(subject, clipping, sbbox, cbbox, operation) {
+	  var eventQueue = new tinyqueue(null, compareEvents);
+	  var polygonSet, isExteriorRing, i, ii, j, jj; //, k, kk;
 
-	            overlap = intersectionArea$1(bbox1, bbox2);
-	            area = bboxArea$1(bbox1) + bboxArea$1(bbox2);
+	  for (i = 0, ii = subject.length; i < ii; i++) {
+	    polygonSet = subject[i];
 
-	            // choose distribution with minimum overlap
-	            if (overlap < minOverlap) {
-	                minOverlap = overlap;
-	                index = i;
+	    for (j = 0, jj = polygonSet.length; j < jj; j++) {
+	      isExteriorRing = j === 0;
+	      if (isExteriorRing) contourId++;
+	      processPolygon(polygonSet[j], true, contourId, eventQueue, sbbox, isExteriorRing);
+	    }
+	  }
 
-	                minArea = area < minArea ? area : minArea;
+	  for (i = 0, ii = clipping.length; i < ii; i++) {
+	    polygonSet = clipping[i];
 
-	            } else if (overlap === minOverlap) {
-	                // otherwise choose distribution with minimum area
-	                if (area < minArea) {
-	                    minArea = area;
-	                    index = i;
-	                }
-	            }
-	        }
+	    for (j = 0, jj = polygonSet.length; j < jj; j++) {
+	      isExteriorRing = j === 0;
+	      if (operation === DIFFERENCE) isExteriorRing = false;
+	      if (isExteriorRing) contourId++;
+	      processPolygon(polygonSet[j], false, contourId, eventQueue, cbbox, isExteriorRing);
+	    }
+	  }
 
-	        return index;
-	    },
+	  return eventQueue;
+	}
 
-	    // sorts node children by the best axis for split
-	    _chooseSplitAxis: function (node, m, M) {
+	var EMPTY = [];
 
-	        var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX$1,
-	            compareMinY = node.leaf ? this.compareMinY : compareNodeMinY$1,
-	            xMargin = this._allDistMargin(node, m, M, compareMinX),
-	            yMargin = this._allDistMargin(node, m, M, compareMinY);
+	function trivialOperation(subject, clipping, operation) {
+	  var result = null;
 
-	        // if total distributions margin value is minimal for x, sort by minX,
-	        // otherwise it's already sorted by minY
-	        if (xMargin < yMargin) { node.children.sort(compareMinX); }
-	    },
+	  if (subject.length * clipping.length === 0) {
+	    if (operation === INTERSECTION) {
+	      result = EMPTY;
+	    } else if (operation === DIFFERENCE) {
+	      result = subject;
+	    } else if (operation === UNION || operation === XOR) {
+	      result = subject.length === 0 ? clipping : subject;
+	    }
+	  }
 
-	    // total margin of all possible split distributions where each node is at least m full
-	    _allDistMargin: function (node, m, M, compare) {
+	  return result;
+	}
 
-	        node.children.sort(compare);
+	function compareBBoxes(subject, clipping, sbbox, cbbox, operation) {
+	  var result = null;
 
-	        var toBBox = this.toBBox,
-	            leftBBox = distBBox$1(node, 0, m, toBBox),
-	            rightBBox = distBBox$1(node, M - m, M, toBBox),
-	            margin = bboxMargin$1(leftBBox) + bboxMargin$1(rightBBox),
-	            i, child;
+	  if (sbbox[0] > cbbox[2] || cbbox[0] > sbbox[2] || sbbox[1] > cbbox[3] || cbbox[1] > sbbox[3]) {
+	    if (operation === INTERSECTION) {
+	      result = EMPTY;
+	    } else if (operation === DIFFERENCE) {
+	      result = subject;
+	    } else if (operation === UNION || operation === XOR) {
+	      result = subject.concat(clipping);
+	    }
+	  }
 
-	        for (i = m; i < M - m; i++) {
-	            child = node.children[i];
-	            extend$3(leftBBox, node.leaf ? toBBox(child) : child);
-	            margin += bboxMargin$1(leftBBox);
-	        }
+	  return result;
+	}
 
-	        for (i = M - m - 1; i >= m; i--) {
-	            child = node.children[i];
-	            extend$3(rightBBox, node.leaf ? toBBox(child) : child);
-	            margin += bboxMargin$1(rightBBox);
-	        }
+	function _boolean(subject, clipping, operation) {
+	  if (typeof subject[0][0][0] === 'number') {
+	    subject = [subject];
+	  }
 
-	        return margin;
-	    },
+	  if (typeof clipping[0][0][0] === 'number') {
+	    clipping = [clipping];
+	  }
 
-	    _adjustParentBBoxes: function (bbox, path, level) {
-	        // adjust bboxes along the given tree path
-	        for (var i = level; i >= 0; i--) {
-	            extend$3(path[i], bbox);
-	        }
-	    },
+	  var trivial = trivialOperation(subject, clipping, operation);
 
-	    _condense: function (path) {
-	        // go through the path, removing empty nodes and updating bboxes
-	        for (var i = path.length - 1, siblings; i >= 0; i--) {
-	            if (path[i].children.length === 0) {
-	                if (i > 0) {
-	                    siblings = path[i - 1].children;
-	                    siblings.splice(siblings.indexOf(path[i]), 1);
+	  if (trivial) {
+	    return trivial === EMPTY ? null : trivial;
+	  }
 
-	                } else { this.clear(); }
+	  var sbbox = [Infinity, Infinity, -Infinity, -Infinity];
+	  var cbbox = [Infinity, Infinity, -Infinity, -Infinity]; // console.time('fill queue');
 
-	            } else { calcBBox$1(path[i], this.toBBox); }
-	        }
-	    },
+	  var eventQueue = fillQueue(subject, clipping, sbbox, cbbox, operation); //console.timeEnd('fill queue');
 
-	    _initFormat: function (format) {
-	        // data format (minX, minY, maxX, maxY accessors)
+	  trivial = compareBBoxes(subject, clipping, sbbox, cbbox, operation);
 
-	        // uses eval-type function compilation instead of just accepting a toBBox function
-	        // because the algorithms are very sensitive to sorting functions performance,
-	        // so they should be dead simple and without inner calls
+	  if (trivial) {
+	    return trivial === EMPTY ? null : trivial;
+	  } // console.time('subdivide edges');
 
-	        var compareArr = ['return a', ' - b', ';'];
 
-	        this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));
-	        this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));
+	  var sortedEvents = subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation); //console.timeEnd('subdivide edges');
+	  // console.time('connect vertices');
 
-	        this.toBBox = new Function('a',
-	            'return {minX: a' + format[0] +
-	            ', minY: a' + format[1] +
-	            ', maxX: a' + format[2] +
-	            ', maxY: a' + format[3] + '};');
-	    }
-	};
+	  var contours = connectEdges(sortedEvents); //console.timeEnd('connect vertices');
+	  // Convert contours to polygons
 
-	function findItem$1(item, items, equalsFn) {
-	    if (!equalsFn) { return items.indexOf(item); }
+	  var polygons = [];
 
-	    for (var i = 0; i < items.length; i++) {
-	        if (equalsFn(item, items[i])) { return i; }
-	    }
-	    return -1;
-	}
+	  for (var i = 0; i < contours.length; i++) {
+	    var contour = contours[i];
 
-	// calculate node's bbox from bboxes of its children
-	function calcBBox$1(node, toBBox) {
-	    distBBox$1(node, 0, node.children.length, toBBox, node);
-	}
+	    if (contour.isExterior()) {
+	      // The exterior ring goes first
+	      var rings = [contour.points]; // Followed by holes if any
 
-	// min bounding rectangle of node children from k to p-1
-	function distBBox$1(node, k, p, toBBox, destNode) {
-	    if (!destNode) { destNode = createNode$1(null); }
-	    destNode.minX = Infinity;
-	    destNode.minY = Infinity;
-	    destNode.maxX = -Infinity;
-	    destNode.maxY = -Infinity;
+	      for (var j = 0; j < contour.holeIds.length; j++) {
+	        var holeId = contour.holeIds[j];
+	        rings.push(contours[holeId].points);
+	      }
 
-	    for (var i = k, child; i < p; i++) {
-	        child = node.children[i];
-	        extend$3(destNode, node.leaf ? toBBox(child) : child);
+	      polygons.push(rings);
 	    }
+	  }
 
-	    return destNode;
-	}
-
-	function extend$3(a, b) {
-	    a.minX = Math.min(a.minX, b.minX);
-	    a.minY = Math.min(a.minY, b.minY);
-	    a.maxX = Math.max(a.maxX, b.maxX);
-	    a.maxY = Math.max(a.maxY, b.maxY);
-	    return a;
+	  return polygons;
 	}
 
-	function compareNodeMinX$1(a, b) { return a.minX - b.minX; }
-	function compareNodeMinY$1(a, b) { return a.minY - b.minY; }
-
-	function bboxArea$1(a)   { return (a.maxX - a.minX) * (a.maxY - a.minY); }
-	function bboxMargin$1(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }
-
-	function enlargedArea$1(a, b) {
-	    return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *
-	           (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
+	function union(subject, clipping) {
+	  return _boolean(subject, clipping, UNION);
 	}
 
-	function intersectionArea$1(a, b) {
-	    var minX = Math.max(a.minX, b.minX),
-	        minY = Math.max(a.minY, b.minY),
-	        maxX = Math.min(a.maxX, b.maxX),
-	        maxY = Math.min(a.maxY, b.maxY);
-
-	    return Math.max(0, maxX - minX) *
-	           Math.max(0, maxY - minY);
-	}
+	var read$6 = function read(buffer, offset, isLE, mLen, nBytes) {
+	  var e, m;
+	  var eLen = nBytes * 8 - mLen - 1;
+	  var eMax = (1 << eLen) - 1;
+	  var eBias = eMax >> 1;
+	  var nBits = -7;
+	  var i = isLE ? nBytes - 1 : 0;
+	  var d = isLE ? -1 : 1;
+	  var s = buffer[offset + i];
+	  i += d;
+	  e = s & (1 << -nBits) - 1;
+	  s >>= -nBits;
+	  nBits += eLen;
 
-	function contains$2(a, b) {
-	    return a.minX <= b.minX &&
-	           a.minY <= b.minY &&
-	           b.maxX <= a.maxX &&
-	           b.maxY <= a.maxY;
-	}
+	  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
-	function intersects$1(a, b) {
-	    return b.minX <= a.maxX &&
-	           b.minY <= a.maxY &&
-	           b.maxX >= a.minX &&
-	           b.maxY >= a.minY;
-	}
+	  m = e & (1 << -nBits) - 1;
+	  e >>= -nBits;
+	  nBits += mLen;
 
-	function createNode$1(children) {
-	    return {
-	        children: children,
-	        height: 1,
-	        leaf: true,
-	        minX: Infinity,
-	        minY: Infinity,
-	        maxX: -Infinity,
-	        maxY: -Infinity
-	    };
-	}
+	  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
-	// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
-	// combines selection algorithm with binary divide & conquer approach
+	  if (e === 0) {
+	    e = 1 - eBias;
+	  } else if (e === eMax) {
+	    return m ? NaN : (s ? -1 : 1) * Infinity;
+	  } else {
+	    m = m + Math.pow(2, mLen);
+	    e = e - eBias;
+	  }
 
-	function multiSelect$1(arr, left, right, n, compare) {
-	    var stack = [left, right],
-	        mid;
+	  return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
+	};
 
-	    while (stack.length) {
-	        right = stack.pop();
-	        left = stack.pop();
+	var write$6 = function write(buffer, value, offset, isLE, mLen, nBytes) {
+	  var e, m, c;
+	  var eLen = nBytes * 8 - mLen - 1;
+	  var eMax = (1 << eLen) - 1;
+	  var eBias = eMax >> 1;
+	  var rt = mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0;
+	  var i = isLE ? 0 : nBytes - 1;
+	  var d = isLE ? 1 : -1;
+	  var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;
+	  value = Math.abs(value);
 
-	        if (right - left <= n) { continue; }
+	  if (isNaN(value) || value === Infinity) {
+	    m = isNaN(value) ? 1 : 0;
+	    e = eMax;
+	  } else {
+	    e = Math.floor(Math.log(value) / Math.LN2);
 
-	        mid = left + Math.ceil((right - left) / n / 2) * n;
-	        quickselect$1(arr, mid, left, right, compare);
+	    if (value * (c = Math.pow(2, -e)) < 1) {
+	      e--;
+	      c *= 2;
+	    }
 
-	        stack.push(left, mid, mid, right);
+	    if (e + eBias >= 1) {
+	      value += rt / c;
+	    } else {
+	      value += rt * Math.pow(2, 1 - eBias);
 	    }
-	}
-	rbush_1.default = _default$2;
 
-	var lineclip_1$1 = lineclip$1;
+	    if (value * c >= 2) {
+	      e++;
+	      c /= 2;
+	    }
 
-	lineclip$1.polyline = lineclip$1;
-	lineclip$1.polygon = polygonclip$1;
+	    if (e + eBias >= eMax) {
+	      m = 0;
+	      e = eMax;
+	    } else if (e + eBias >= 1) {
+	      m = (value * c - 1) * Math.pow(2, mLen);
+	      e = e + eBias;
+	    } else {
+	      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
+	      e = 0;
+	    }
+	  }
 
+	  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
-	// Cohen-Sutherland line clippign algorithm, adapted to efficiently
-	// handle polylines rather than just segments
+	  e = e << mLen | m;
+	  eLen += mLen;
 
-	function lineclip$1(points, bbox, result) {
+	  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
 
-	    var len = points.length,
-	        codeA = bitCode$1(points[0], bbox),
-	        part = [],
-	        i, a, b, codeB, lastCode;
+	  buffer[offset + i - d] |= s * 128;
+	};
 
-	    if (!result) { result = []; }
+	var ieee754$1 = {
+	  read: read$6,
+	  write: write$6
+	};
 
-	    for (i = 1; i < len; i++) {
-	        a = points[i - 1];
-	        b = points[i];
-	        codeB = lastCode = bitCode$1(b, bbox);
+	var pbf = Pbf;
 
-	        while (true) {
+	function Pbf(buf) {
+	  this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);
+	  this.pos = 0;
+	  this.type = 0;
+	  this.length = this.buf.length;
+	}
 
-	            if (!(codeA | codeB)) { // accept
-	                part.push(a);
+	Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
 
-	                if (codeB !== lastCode) { // segment went outside
-	                    part.push(b);
+	Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
 
-	                    if (i < len - 1) { // start a new line
-	                        result.push(part);
-	                        part = [];
-	                    }
-	                } else if (i === len - 1) {
-	                    part.push(b);
-	                }
-	                break;
+	Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
 
-	            } else if (codeA & codeB) { // trivial reject
-	                break;
+	Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
 
-	            } else if (codeA) { // a outside, intersect with clip edge
-	                a = intersect$1(a, b, codeA, bbox);
-	                codeA = bitCode$1(a, bbox);
+	var SHIFT_LEFT_32 = (1 << 16) * (1 << 16),
+	    SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32; // Threshold chosen based on both benchmarking and knowledge about browser string
+	// data structures (which currently switch structure types at 12 bytes or more)
 
-	            } else { // b outside
-	                b = intersect$1(a, b, codeB, bbox);
-	                codeB = bitCode$1(b, bbox);
-	            }
-	        }
+	var TEXT_DECODER_MIN_LENGTH = 12;
+	var utf8TextDecoder = typeof TextDecoder === 'undefined' ? null : new TextDecoder('utf8');
+	Pbf.prototype = {
+	  destroy: function destroy() {
+	    this.buf = null;
+	  },
+	  // === READING =================================================================
+	  readFields: function readFields(readField, result, end) {
+	    end = end || this.length;
 
-	        codeA = lastCode;
+	    while (this.pos < end) {
+	      var val = this.readVarint(),
+	          tag = val >> 3,
+	          startPos = this.pos;
+	      this.type = val & 0x7;
+	      readField(tag, result, this);
+	      if (this.pos === startPos) this.skip(val);
 	    }
 
-	    if (part.length) { result.push(part); }
-
 	    return result;
-	}
+	  },
+	  readMessage: function readMessage(readField, result) {
+	    return this.readFields(readField, result, this.readVarint() + this.pos);
+	  },
+	  readFixed32: function readFixed32() {
+	    var val = readUInt32(this.buf, this.pos);
+	    this.pos += 4;
+	    return val;
+	  },
+	  readSFixed32: function readSFixed32() {
+	    var val = readInt32(this.buf, this.pos);
+	    this.pos += 4;
+	    return val;
+	  },
+	  // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
+	  readFixed64: function readFixed64() {
+	    var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
+	    this.pos += 8;
+	    return val;
+	  },
+	  readSFixed64: function readSFixed64() {
+	    var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
+	    this.pos += 8;
+	    return val;
+	  },
+	  readFloat: function readFloat() {
+	    var val = ieee754$1.read(this.buf, this.pos, true, 23, 4);
+	    this.pos += 4;
+	    return val;
+	  },
+	  readDouble: function readDouble() {
+	    var val = ieee754$1.read(this.buf, this.pos, true, 52, 8);
+	    this.pos += 8;
+	    return val;
+	  },
+	  readVarint: function readVarint(isSigned) {
+	    var buf = this.buf,
+	        val,
+	        b;
+	    b = buf[this.pos++];
+	    val = b & 0x7f;
+	    if (b < 0x80) return val;
+	    b = buf[this.pos++];
+	    val |= (b & 0x7f) << 7;
+	    if (b < 0x80) return val;
+	    b = buf[this.pos++];
+	    val |= (b & 0x7f) << 14;
+	    if (b < 0x80) return val;
+	    b = buf[this.pos++];
+	    val |= (b & 0x7f) << 21;
+	    if (b < 0x80) return val;
+	    b = buf[this.pos];
+	    val |= (b & 0x0f) << 28;
+	    return readVarintRemainder(val, isSigned, this);
+	  },
+	  readVarint64: function readVarint64() {
+	    // for compatibility with v2.0.1
+	    return this.readVarint(true);
+	  },
+	  readSVarint: function readSVarint() {
+	    var num = this.readVarint();
+	    return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
+	  },
+	  readBoolean: function readBoolean() {
+	    return Boolean(this.readVarint());
+	  },
+	  readString: function readString() {
+	    var end = this.readVarint() + this.pos;
+	    var pos = this.pos;
+	    this.pos = end;
 
-	// Sutherland-Hodgeman polygon clipping algorithm
+	    if (end - pos >= TEXT_DECODER_MIN_LENGTH && utf8TextDecoder) {
+	      // longer strings are fast with the built-in browser TextDecoder API
+	      return readUtf8TextDecoder(this.buf, pos, end);
+	    } // short strings are fast with our custom implementation
 
-	function polygonclip$1(points, bbox) {
 
-	    var result, edge, prev, prevInside, i, p, inside;
+	    return readUtf8(this.buf, pos, end);
+	  },
+	  readBytes: function readBytes() {
+	    var end = this.readVarint() + this.pos,
+	        buffer = this.buf.subarray(this.pos, end);
+	    this.pos = end;
+	    return buffer;
+	  },
+	  // verbose for performance reasons; doesn't affect gzipped size
+	  readPackedVarint: function readPackedVarint(arr, isSigned) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readVarint(isSigned));
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	    // clip against each side of the clip rectangle
-	    for (edge = 1; edge <= 8; edge *= 2) {
-	        result = [];
-	        prev = points[points.length - 1];
-	        prevInside = !(bitCode$1(prev, bbox) & edge);
+	    while (this.pos < end) {
+	      arr.push(this.readVarint(isSigned));
+	    }
 
-	        for (i = 0; i < points.length; i++) {
-	            p = points[i];
-	            inside = !(bitCode$1(p, bbox) & edge);
+	    return arr;
+	  },
+	  readPackedSVarint: function readPackedSVarint(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	            // if segment goes through the clip window, add an intersection
-	            if (inside !== prevInside) { result.push(intersect$1(prev, p, edge, bbox)); }
+	    while (this.pos < end) {
+	      arr.push(this.readSVarint());
+	    }
 
-	            if (inside) { result.push(p); } // add a point if it's inside
+	    return arr;
+	  },
+	  readPackedBoolean: function readPackedBoolean(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	            prev = p;
-	            prevInside = inside;
-	        }
+	    while (this.pos < end) {
+	      arr.push(this.readBoolean());
+	    }
 
-	        points = result;
+	    return arr;
+	  },
+	  readPackedFloat: function readPackedFloat(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	        if (!points.length) { break; }
+	    while (this.pos < end) {
+	      arr.push(this.readFloat());
 	    }
 
-	    return result;
-	}
-
-	// intersect a segment against one of the 4 lines that make up the bbox
+	    return arr;
+	  },
+	  readPackedDouble: function readPackedDouble(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	function intersect$1(a, b, edge, bbox) {
-	    return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
-	           edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
-	           edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
-	           edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
-	           null;
-	}
+	    while (this.pos < end) {
+	      arr.push(this.readDouble());
+	    }
 
-	// bit code reflects the point position relative to the bbox:
+	    return arr;
+	  },
+	  readPackedFixed32: function readPackedFixed32(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	//         left  mid  right
-	//    top  1001  1000  1010
-	//    mid  0001  0000  0010
-	// bottom  0101  0100  0110
+	    while (this.pos < end) {
+	      arr.push(this.readFixed32());
+	    }
 
-	function bitCode$1(p, bbox) {
-	    var code = 0;
+	    return arr;
+	  },
+	  readPackedSFixed32: function readPackedSFixed32(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	    if (p[0] < bbox[0]) { code |= 1; } // left
-	    else if (p[0] > bbox[2]) { code |= 2; } // right
+	    while (this.pos < end) {
+	      arr.push(this.readSFixed32());
+	    }
 
-	    if (p[1] < bbox[1]) { code |= 4; } // bottom
-	    else if (p[1] > bbox[3]) { code |= 8; } // top
+	    return arr;
+	  },
+	  readPackedFixed64: function readPackedFixed64(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	    return code;
-	}
+	    while (this.pos < end) {
+	      arr.push(this.readFixed64());
+	    }
 
-	var whichPolygon_1 = whichPolygon;
+	    return arr;
+	  },
+	  readPackedSFixed64: function readPackedSFixed64(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	function whichPolygon(data) {
-	    var bboxes = [];
-	    for (var i = 0; i < data.features.length; i++) {
-	        var feature = data.features[i];
-	        var coords = feature.geometry.coordinates;
+	    while (this.pos < end) {
+	      arr.push(this.readSFixed64());
+	    }
 
-	        if (feature.geometry.type === 'Polygon') {
-	            bboxes.push(treeItem(coords, feature.properties));
+	    return arr;
+	  },
+	  skip: function skip(val) {
+	    var type = val & 0x7;
+	    if (type === Pbf.Varint) while (this.buf[this.pos++] > 0x7f) {} else if (type === Pbf.Bytes) this.pos = this.readVarint() + this.pos;else if (type === Pbf.Fixed32) this.pos += 4;else if (type === Pbf.Fixed64) this.pos += 8;else throw new Error('Unimplemented type: ' + type);
+	  },
+	  // === WRITING =================================================================
+	  writeTag: function writeTag(tag, type) {
+	    this.writeVarint(tag << 3 | type);
+	  },
+	  realloc: function realloc(min) {
+	    var length = this.length || 16;
 
-	        } else if (feature.geometry.type === 'MultiPolygon') {
-	            for (var j = 0; j < coords.length; j++) {
-	                bboxes.push(treeItem(coords[j], feature.properties));
-	            }
-	        }
+	    while (length < this.pos + min) {
+	      length *= 2;
 	    }
 
-	    var tree = rbush_1().load(bboxes);
+	    if (length !== this.length) {
+	      var buf = new Uint8Array(length);
+	      buf.set(this.buf);
+	      this.buf = buf;
+	      this.length = length;
+	    }
+	  },
+	  finish: function finish() {
+	    this.length = this.pos;
+	    this.pos = 0;
+	    return this.buf.subarray(0, this.length);
+	  },
+	  writeFixed32: function writeFixed32(val) {
+	    this.realloc(4);
+	    writeInt32(this.buf, val, this.pos);
+	    this.pos += 4;
+	  },
+	  writeSFixed32: function writeSFixed32(val) {
+	    this.realloc(4);
+	    writeInt32(this.buf, val, this.pos);
+	    this.pos += 4;
+	  },
+	  writeFixed64: function writeFixed64(val) {
+	    this.realloc(8);
+	    writeInt32(this.buf, val & -1, this.pos);
+	    writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
+	    this.pos += 8;
+	  },
+	  writeSFixed64: function writeSFixed64(val) {
+	    this.realloc(8);
+	    writeInt32(this.buf, val & -1, this.pos);
+	    writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
+	    this.pos += 8;
+	  },
+	  writeVarint: function writeVarint(val) {
+	    val = +val || 0;
 
-	    function query(p, multi) {
-	        var output = [],
-	            result = tree.search({
-	                minX: p[0],
-	                minY: p[1],
-	                maxX: p[0],
-	                maxY: p[1]
-	            });
-	        for (var i = 0; i < result.length; i++) {
-	            if (insidePolygon(result[i].coords, p)) {
-	                if (multi)
-	                    { output.push(result[i].props); }
-	                else
-	                    { return result[i].props; }
-	            }
-	        }
-	        return multi && output.length ? output : null;
+	    if (val > 0xfffffff || val < 0) {
+	      writeBigVarint(val, this);
+	      return;
 	    }
 
-	    query.tree = tree;
-	    query.bbox = function queryBBox(bbox) {
-	        var output = [];
-	        var result = tree.search({
-	            minX: bbox[0],
-	            minY: bbox[1],
-	            maxX: bbox[2],
-	            maxY: bbox[3]
-	        });
-	        for (var i = 0; i < result.length; i++) {
-	            if (polygonIntersectsBBox(result[i].coords, bbox)) {
-	                output.push(result[i].props);
-	            }
-	        }
-	        return output;
-	    };
+	    this.realloc(4);
+	    this.buf[this.pos++] = val & 0x7f | (val > 0x7f ? 0x80 : 0);
+	    if (val <= 0x7f) return;
+	    this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
+	    if (val <= 0x7f) return;
+	    this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
+	    if (val <= 0x7f) return;
+	    this.buf[this.pos++] = val >>> 7 & 0x7f;
+	  },
+	  writeSVarint: function writeSVarint(val) {
+	    this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
+	  },
+	  writeBoolean: function writeBoolean(val) {
+	    this.writeVarint(Boolean(val));
+	  },
+	  writeString: function writeString(str) {
+	    str = String(str);
+	    this.realloc(str.length * 4);
+	    this.pos++; // reserve 1 byte for short string length
 
-	    return query;
-	}
+	    var startPos = this.pos; // write the string directly to the buffer and see how much was written
 
-	function polygonIntersectsBBox(polygon, bbox) {
-	    var bboxCenter = [
-	        (bbox[0] + bbox[2]) / 2,
-	        (bbox[1] + bbox[3]) / 2
-	    ];
-	    if (insidePolygon(polygon, bboxCenter)) { return true; }
-	    for (var i = 0; i < polygon.length; i++) {
-	        if (lineclip_1$1(polygon[i], bbox).length > 0) { return true; }
-	    }
-	    return false;
-	}
+	    this.pos = writeUtf8(this.buf, str, this.pos);
+	    var len = this.pos - startPos;
+	    if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position
 
-	// ray casting algorithm for detecting if point is in polygon
-	function insidePolygon(rings, p) {
-	    var inside = false;
-	    for (var i = 0, len = rings.length; i < len; i++) {
-	        var ring = rings[i];
-	        for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
-	            if (rayIntersect(p, ring[j], ring[k])) { inside = !inside; }
-	        }
+	    this.pos = startPos - 1;
+	    this.writeVarint(len);
+	    this.pos += len;
+	  },
+	  writeFloat: function writeFloat(val) {
+	    this.realloc(4);
+	    ieee754$1.write(this.buf, val, this.pos, true, 23, 4);
+	    this.pos += 4;
+	  },
+	  writeDouble: function writeDouble(val) {
+	    this.realloc(8);
+	    ieee754$1.write(this.buf, val, this.pos, true, 52, 8);
+	    this.pos += 8;
+	  },
+	  writeBytes: function writeBytes(buffer) {
+	    var len = buffer.length;
+	    this.writeVarint(len);
+	    this.realloc(len);
+
+	    for (var i = 0; i < len; i++) {
+	      this.buf[this.pos++] = buffer[i];
 	    }
-	    return inside;
+	  },
+	  writeRawMessage: function writeRawMessage(fn, obj) {
+	    this.pos++; // reserve 1 byte for short message length
+	    // write the message directly to the buffer and see how much was written
+
+	    var startPos = this.pos;
+	    fn(obj, this);
+	    var len = this.pos - startPos;
+	    if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position
+
+	    this.pos = startPos - 1;
+	    this.writeVarint(len);
+	    this.pos += len;
+	  },
+	  writeMessage: function writeMessage(tag, fn, obj) {
+	    this.writeTag(tag, Pbf.Bytes);
+	    this.writeRawMessage(fn, obj);
+	  },
+	  writePackedVarint: function writePackedVarint(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedVarint, arr);
+	  },
+	  writePackedSVarint: function writePackedSVarint(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedSVarint, arr);
+	  },
+	  writePackedBoolean: function writePackedBoolean(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedBoolean, arr);
+	  },
+	  writePackedFloat: function writePackedFloat(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedFloat, arr);
+	  },
+	  writePackedDouble: function writePackedDouble(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedDouble, arr);
+	  },
+	  writePackedFixed32: function writePackedFixed32(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedFixed, arr);
+	  },
+	  writePackedSFixed32: function writePackedSFixed32(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedSFixed, arr);
+	  },
+	  writePackedFixed64: function writePackedFixed64(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedFixed2, arr);
+	  },
+	  writePackedSFixed64: function writePackedSFixed64(tag, arr) {
+	    if (arr.length) this.writeMessage(tag, _writePackedSFixed2, arr);
+	  },
+	  writeBytesField: function writeBytesField(tag, buffer) {
+	    this.writeTag(tag, Pbf.Bytes);
+	    this.writeBytes(buffer);
+	  },
+	  writeFixed32Field: function writeFixed32Field(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed32);
+	    this.writeFixed32(val);
+	  },
+	  writeSFixed32Field: function writeSFixed32Field(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed32);
+	    this.writeSFixed32(val);
+	  },
+	  writeFixed64Field: function writeFixed64Field(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed64);
+	    this.writeFixed64(val);
+	  },
+	  writeSFixed64Field: function writeSFixed64Field(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed64);
+	    this.writeSFixed64(val);
+	  },
+	  writeVarintField: function writeVarintField(tag, val) {
+	    this.writeTag(tag, Pbf.Varint);
+	    this.writeVarint(val);
+	  },
+	  writeSVarintField: function writeSVarintField(tag, val) {
+	    this.writeTag(tag, Pbf.Varint);
+	    this.writeSVarint(val);
+	  },
+	  writeStringField: function writeStringField(tag, str) {
+	    this.writeTag(tag, Pbf.Bytes);
+	    this.writeString(str);
+	  },
+	  writeFloatField: function writeFloatField(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed32);
+	    this.writeFloat(val);
+	  },
+	  writeDoubleField: function writeDoubleField(tag, val) {
+	    this.writeTag(tag, Pbf.Fixed64);
+	    this.writeDouble(val);
+	  },
+	  writeBooleanField: function writeBooleanField(tag, val) {
+	    this.writeVarintField(tag, Boolean(val));
+	  }
+	};
+
+	function readVarintRemainder(l, s, p) {
+	  var buf = p.buf,
+	      h,
+	      b;
+	  b = buf[p.pos++];
+	  h = (b & 0x70) >> 4;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x7f) << 3;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x7f) << 10;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x7f) << 17;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x7f) << 24;
+	  if (b < 0x80) return toNum(l, h, s);
+	  b = buf[p.pos++];
+	  h |= (b & 0x01) << 31;
+	  if (b < 0x80) return toNum(l, h, s);
+	  throw new Error('Expected varint not more than 10 bytes');
 	}
 
-	function rayIntersect(p, p1, p2) {
-	    return ((p1[1] > p[1]) !== (p2[1] > p[1])) && (p[0] < (p2[0] - p1[0]) * (p[1] - p1[1]) / (p2[1] - p1[1]) + p1[0]);
+	function readPackedEnd(pbf) {
+	  return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
 	}
 
-	function treeItem(coords, props) {
-	    var item = {
-	        minX: Infinity,
-	        minY: Infinity,
-	        maxX: -Infinity,
-	        maxY: -Infinity,
-	        coords: coords,
-	        props: props
-	    };
+	function toNum(low, high, isSigned) {
+	  if (isSigned) {
+	    return high * 0x100000000 + (low >>> 0);
+	  }
 
-	    for (var i = 0; i < coords[0].length; i++) {
-	        var p = coords[0][i];
-	        item.minX = Math.min(item.minX, p[0]);
-	        item.minY = Math.min(item.minY, p[1]);
-	        item.maxX = Math.max(item.maxX, p[0]);
-	        item.maxY = Math.max(item.maxY, p[1]);
-	    }
-	    return item;
+	  return (high >>> 0) * 0x100000000 + (low >>> 0);
 	}
 
-	var type = "FeatureCollection";
-	var features = [{type:"Feature",properties:{m49:"680",wikidata:"Q3405693",nameEn:"Sark",country:"GB",groups:["GG","830","154","150"],level:"subterritory",driveSide:"left",roadSpeedUnit:"mph",callingCodes:["44 01481"]},geometry:{type:"MultiPolygon",coordinates:[[[[-2.36485,49.48223],[-2.65349,49.15373],[-2.09454,49.46288],[-2.36485,49.48223]]]]}},{type:"Feature",properties:{m49:"001",wikidata:"Q2",nameEn:"World",aliases:["Earth","Planet"],level:"world"},geometry:null},{type:"Feature",properties:{m49:"142",wikidata:"Q48",nameEn:"Asia",level:"region"},geometry:null},{type:"Feature",properties:{m49:"143",wikidata:"Q27275",nameEn:"Central Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"145",wikidata:"Q27293",nameEn:"Western Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"150",wikidata:"Q46",nameEn:"Europe",level:"region"},geometry:null},{type:"Feature",properties:{m49:"151",wikidata:"Q27468",nameEn:"Eastern Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"154",wikidata:"Q27479",nameEn:"Northern Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"155",wikidata:"Q27496",nameEn:"Western Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"202",wikidata:"Q132959",nameEn:"Sub-Saharan Africa",groups:["002"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"419",wikidata:"Q72829598",nameEn:"Latin America and the Caribbean",groups:["019"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"830",wikidata:"Q42314",nameEn:"Channel Islands",groups:["150","154"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"019",wikidata:"Q828",nameEn:"Americas",level:"region"},geometry:null},{type:"Feature",properties:{m49:"029",wikidata:"Q664609",nameEn:"Caribbean",groups:["419","019","003"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"034",wikidata:"Q771405",nameEn:"Southern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"002",wikidata:"Q15",nameEn:"Africa",level:"region"},geometry:null},{type:"Feature",properties:{m49:"003",wikidata:"Q49",nameEn:"North America",groups:["019"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"017",wikidata:"Q27433",nameEn:"Middle Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"039",wikidata:"Q27449",nameEn:"Southern Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"005",wikidata:"Q18",nameEn:"South America",groups:["419","019"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"009",wikidata:"Q538",nameEn:"Oceania",level:"region"},geometry:null},{type:"Feature",properties:{m49:"061",wikidata:"Q35942",nameEn:"Polynesia",groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"014",wikidata:"Q27407",nameEn:"Eastern Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"053",wikidata:"Q45256",nameEn:"Australia and New Zealand",aliases:["Australasia"],groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"011",wikidata:"Q4412",nameEn:"Western Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"013",wikidata:"Q27611",nameEn:"Central America",groups:["419","019","003"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"021",wikidata:"Q2017699",nameEn:"Northern America",groups:["019","003"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"035",wikidata:"Q11708",nameEn:"South-eastern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"018",wikidata:"Q27394",nameEn:"Southern Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"030",wikidata:"Q27231",nameEn:"Eastern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"015",wikidata:"Q27381",nameEn:"Northern Africa",groups:["002"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"054",wikidata:"Q37394",nameEn:"Melanesia",groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"057",wikidata:"Q3359409",nameEn:"Micronesia",groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{iso1A2:"AC",iso1A3:"ASC",wikidata:"Q46197",nameEn:"Ascension Island",country:"GB",groups:["SH","011","202","002"],isoStatus:"excRes",driveSide:"left",roadSpeedUnit:"mph",callingCodes:["247"]},geometry:{type:"MultiPolygon",coordinates:[[[[-14.82771,-8.70814],[-13.33271,-8.07391],[-14.91926,-6.63386],[-14.82771,-8.70814]]]]}},{type:"Feature",properties:{iso1A2:"AD",iso1A3:"AND",iso1N3:"020",wikidata:"Q228",nameEn:"Andorra",groups:["039","150"],callingCodes:["376"]},geometry:{type:"MultiPolygon",coordinates:[[[[1.72515,42.50338],[1.73683,42.55492],[1.7858,42.57698],[1.72588,42.59098],[1.73452,42.61515],[1.68267,42.62533],[1.6625,42.61982],[1.63485,42.62957],[1.60085,42.62703],[1.55418,42.65669],[1.50867,42.64483],[1.48043,42.65203],[1.46718,42.63296],[1.47986,42.61346],[1.44197,42.60217],[1.42512,42.58292],[1.44529,42.56722],[1.4234,42.55959],[1.41245,42.53539],[1.44759,42.54431],[1.46661,42.50949],[1.41648,42.48315],[1.43838,42.47848],[1.44529,42.43724],[1.5127,42.42959],[1.55073,42.43299],[1.55937,42.45808],[1.57953,42.44957],[1.58933,42.46275],[1.65674,42.47125],[1.66826,42.50779],[1.70571,42.48867],[1.72515,42.50338]]]]}},{type:"Feature",properties:{iso1A2:"AE",iso1A3:"ARE",iso1N3:"784",wikidata:"Q878",nameEn:"United 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-	var rawBorders = {
-	type: type,
-	features: features
-	};
+	function writeBigVarint(val, pbf) {
+	  var low, high;
 
-	var borders = rawBorders;
-	var whichPolygonGetter = {};
-	var featuresByCode = {};
-	var idFilterRegex = /\bThe\b|\bthe\b|\band\b|\bof\b|[-_ .,()&[\]/]/g;
-	var levels = [
-	  'subterritory',
-	  'territory',
-	  'country',
-	  'intermediateRegion',
-	  'subregion',
-	  'region',
-	  'union',
-	  'world'
-	];
-	loadDerivedDataAndCaches(borders);
-	function loadDerivedDataAndCaches(borders) {
-	  var identifierProps = ['iso1A2', 'iso1A3', 'm49', 'wikidata', 'emojiFlag', 'nameEn'];
-	  var geometryFeatures = [];
-	  for (var i in borders.features) {
-	    var feature = borders.features[i];
-	    feature.properties.id = feature.properties.iso1A2 || feature.properties.m49;
-	    loadM49(feature);
-	    loadIsoStatus(feature);
-	    loadLevel(feature);
-	    loadGroups(feature);
-	    loadRoadSpeedUnit(feature);
-	    loadDriveSide(feature);
-	    loadFlag(feature);
-	    cacheFeatureByIDs(feature);
-	    if (feature.geometry) { geometryFeatures.push(feature); }
-	  }
-	  for (var i$1 in borders.features) {
-	    var feature$1 = borders.features[i$1];
-	    feature$1.properties.groups.sort(function(groupID1, groupID2) {
-	      return (
-	        levels.indexOf(featuresByCode[groupID1].properties.level) -
-	        levels.indexOf(featuresByCode[groupID2].properties.level)
-	      );
-	    });
-	    loadMembersForGroupsOf(feature$1);
-	  }
-	  var geometryOnlyCollection = {
-	    type: 'RegionFeatureCollection',
-	    features: geometryFeatures
-	  };
-	  whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
-	  function loadGroups(feature) {
-	    var props = feature.properties;
-	    if (!props.groups) {
-	      props.groups = [];
-	    }
-	    if (props.country) {
-	      props.groups.push(props.country);
-	    }
-	    if (props.m49 !== '001') {
-	      props.groups.push('001');
-	    }
-	  }
-	  function loadM49(feature) {
-	    var props = feature.properties;
-	    if (!props.m49 && props.iso1N3) {
-	      props.m49 = props.iso1N3;
-	    }
-	  }
-	  function loadIsoStatus(feature) {
-	    var props = feature.properties;
-	    if (!props.isoStatus && props.iso1A2) {
-	      props.isoStatus = 'official';
-	    }
-	  }
-	  function loadLevel(feature) {
-	    var props = feature.properties;
-	    if (props.level) { return; }
-	    if (!props.country) {
-	      props.level = 'country';
-	    } else if (props.isoStatus === 'official') {
-	      props.level = 'territory';
-	    } else {
-	      props.level = 'subterritory';
-	    }
-	  }
-	  function loadRoadSpeedUnit(feature) {
-	    var props = feature.properties;
-	    if (props.roadSpeedUnit === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-	      props.roadSpeedUnit = 'km/h';
-	    }
-	  }
-	  function loadDriveSide(feature) {
-	    var props = feature.properties;
-	    if (props.driveSide === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-	      props.driveSide = 'right';
-	    }
-	  }
-	  function loadFlag(feature) {
-	    if (!feature.properties.iso1A2) { return; }
-	    var flag = feature.properties.iso1A2.replace(/./g, function(char) {
-	      return String.fromCodePoint(char.charCodeAt(0) + 127397);
-	    });
-	    feature.properties.emojiFlag = flag;
-	  }
-	  function loadMembersForGroupsOf(feature) {
-	    var featureID = feature.properties.id;
-	    var standardizedGroupIDs = [];
-	    for (var j in feature.properties.groups) {
-	      var groupID = feature.properties.groups[j];
-	      var groupFeature = featuresByCode[groupID];
-	      standardizedGroupIDs.push(groupFeature.properties.id);
-	      if (groupFeature.properties.members) {
-	        groupFeature.properties.members.push(featureID);
-	      } else {
-	        groupFeature.properties.members = [featureID];
-	      }
-	    }
-	    feature.properties.groups = standardizedGroupIDs;
-	  }
-	  function cacheFeatureByIDs(feature) {
-	    for (var k in identifierProps) {
-	      var prop = identifierProps[k];
-	      var id = prop && feature.properties[prop];
-	      if (id) {
-	        id = id.replace(idFilterRegex, '').toUpperCase();
-	        featuresByCode[id] = feature;
-	      }
-	    }
-	    if (feature.properties.aliases) {
-	      for (var j in feature.properties.aliases) {
-	        var alias = feature.properties.aliases[j].replace(idFilterRegex, '').toUpperCase();
-	        featuresByCode[alias] = feature;
-	      }
+	  if (val >= 0) {
+	    low = val % 0x100000000 | 0;
+	    high = val / 0x100000000 | 0;
+	  } else {
+	    low = ~(-val % 0x100000000);
+	    high = ~(-val / 0x100000000);
+
+	    if (low ^ 0xffffffff) {
+	      low = low + 1 | 0;
+	    } else {
+	      low = 0;
+	      high = high + 1 | 0;
 	    }
 	  }
-	}
-	function locArray(loc) {
-	  if (Array.isArray(loc)) {
-	    return loc;
-	  } else if (loc.coordinates) {
-	    return loc.coordinates;
+
+	  if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
+	    throw new Error('Given varint doesn\'t fit into 10 bytes');
 	  }
-	  return loc.geometry.coordinates;
+
+	  pbf.realloc(10);
+	  writeBigVarintLow(low, high, pbf);
+	  writeBigVarintHigh(high, pbf);
 	}
-	function smallestFeature(loc) {
-	  var query = locArray(loc);
-	  var featureProperties = whichPolygonGetter(query);
-	  if (!featureProperties) { return null; }
-	  return featuresByCode[featureProperties.id];
+
+	function writeBigVarintLow(low, high, pbf) {
+	  pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+	  low >>>= 7;
+	  pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+	  low >>>= 7;
+	  pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+	  low >>>= 7;
+	  pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+	  low >>>= 7;
+	  pbf.buf[pbf.pos] = low & 0x7f;
 	}
-	function countryFeature(loc) {
-	  var feature = smallestFeature(loc);
-	  if (!feature) { return null; }
-	  var countryCode = feature.properties.country || feature.properties.iso1A2;
-	  return featuresByCode[countryCode];
+
+	function writeBigVarintHigh(high, pbf) {
+	  var lsb = (high & 0x07) << 4;
+	  pbf.buf[pbf.pos++] |= lsb | ((high >>>= 3) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+	  if (!high) return;
+	  pbf.buf[pbf.pos++] = high & 0x7f;
 	}
-	function featureForLoc(loc, opts) {
-	  if (opts && opts.level && opts.level !== 'country') {
-	    var features = featuresContaining(loc);
-	    var targetLevel = opts.level;
-	    var targetLevelIndex = levels.indexOf(targetLevel);
-	    if (targetLevelIndex === -1) { return null; }
-	    for (var i in features) {
-	      var feature = features[i];
-	      if (
-	        feature.properties.level === targetLevel ||
-	        levels.indexOf(feature.properties.level) > targetLevelIndex
-	      ) {
-	        return feature;
-	      }
-	    }
-	    return null;
+
+	function makeRoomForExtraLength(startPos, len, pbf) {
+	  var extraLen = len <= 0x3fff ? 1 : len <= 0x1fffff ? 2 : len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7)); // if 1 byte isn't enough for encoding message length, shift the data to the right
+
+	  pbf.realloc(extraLen);
+
+	  for (var i = pbf.pos - 1; i >= startPos; i--) {
+	    pbf.buf[i + extraLen] = pbf.buf[i];
 	  }
-	  return countryFeature(loc);
 	}
-	function featureForID(id) {
-	  var stringID;
-	  if (typeof id === 'number') {
-	    stringID = id.toString();
-	    if (stringID.length === 1) {
-	      stringID = '00' + stringID;
-	    } else if (stringID.length === 2) {
-	      stringID = '0' + stringID;
-	    }
-	  } else {
-	    stringID = id.replace(idFilterRegex, '').toUpperCase();
+
+	function _writePackedVarint(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeVarint(arr[i]);
 	  }
-	  return featuresByCode[stringID] || null;
 	}
-	function smallestOrMatchingFeature(query) {
-	  if (typeof query === 'object') {
-	    return smallestFeature(query);
+
+	function _writePackedSVarint(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSVarint(arr[i]);
 	  }
-	  return featureForID(query);
 	}
-	function feature(query, opts) {
-	  if (typeof query === 'object') {
-	    return featureForLoc(query, opts);
+
+	function _writePackedFloat(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFloat(arr[i]);
 	  }
-	  return featureForID(query);
-	}
-	function iso1A2Code(query, opts) {
-	  var match = feature(query, opts);
-	  if (!match) { return null; }
-	  return match.properties.iso1A2 || null;
 	}
-	function featuresContaining(query, strict) {
-	  var feature = smallestOrMatchingFeature(query);
-	  if (!feature) { return []; }
-	  var features = [];
-	  if (!strict || typeof query === 'object') {
-	    features.push(feature);
+
+	function _writePackedDouble(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeDouble(arr[i]);
 	  }
-	  var properties = feature.properties;
-	  for (var i in properties.groups) {
-	    var groupID = properties.groups[i];
-	    features.push(featuresByCode[groupID]);
+	}
+
+	function _writePackedBoolean(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeBoolean(arr[i]);
 	  }
-	  return features;
 	}
-	function roadSpeedUnit(query) {
-	  var feature = smallestOrMatchingFeature(query);
-	  return (feature && feature.properties.roadSpeedUnit) || null;
+
+	function _writePackedFixed(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFixed32(arr[i]);
+	  }
 	}
 
-	var _dataDeprecated;
-	var _nsi;
+	function _writePackedSFixed(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSFixed32(arr[i]);
+	  }
+	}
 
-	function validationOutdatedTags() {
-	  var type = 'outdated_tags';
-	  var nsiKeys = ['amenity', 'shop', 'tourism', 'leisure', 'office'];
+	function _writePackedFixed2(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFixed64(arr[i]);
+	  }
+	}
 
-	  // A concern here in switching to async data means that `_dataDeprecated`
-	  // and `_nsi` will not be available at first, so the data on early tiles
-	  // may not have tags validated fully.
+	function _writePackedSFixed2(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSFixed64(arr[i]);
+	  }
+	} // Buffer code below from https://github.com/feross/buffer, MIT-licensed
 
-	  // initialize deprecated tags array
-	  _mainFileFetcher.get('deprecated')
-	    .then(function (d) { return _dataDeprecated = d; })
-	    .catch(function () { /* ignore */ });
-
-	  _mainFileFetcher.get('nsi_brands')
-	    .then(function (d) {
-	      _nsi = {
-	        brands: d.brands,
-	        matcher: matcher$1(),
-	        wikidata: {},
-	        wikipedia: {}
-	      };
 
-	      // initialize name-suggestion-index matcher
-	      _nsi.matcher.buildMatchIndex(d.brands);
+	function readUInt32(buf, pos) {
+	  return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
+	}
 
-	      // index all known wikipedia and wikidata tags
-	      Object.keys(d.brands).forEach(function (kvnd) {
-	        var brand = d.brands[kvnd];
-	        var wd = brand.tags['brand:wikidata'];
-	        var wp = brand.tags['brand:wikipedia'];
-	        if (wd) { _nsi.wikidata[wd] = kvnd; }
-	        if (wp) { _nsi.wikipedia[wp] = kvnd; }
-	      });
+	function writeInt32(buf, val, pos) {
+	  buf[pos] = val;
+	  buf[pos + 1] = val >>> 8;
+	  buf[pos + 2] = val >>> 16;
+	  buf[pos + 3] = val >>> 24;
+	}
 
-	      return _nsi;
-	    })
-	    .catch(function () { /* ignore */ });
+	function readInt32(buf, pos) {
+	  return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
+	}
 
+	function readUtf8(buf, pos, end) {
+	  var str = '';
+	  var i = pos;
 
-	  function oldTagIssues(entity, graph) {
-	    var oldTags = Object.assign({}, entity.tags);  // shallow copy
-	    var preset = _mainPresetIndex.match(entity, graph);
-	    var subtype = 'deprecated_tags';
-	    if (!preset) { return []; }
+	  while (i < end) {
+	    var b0 = buf[i];
+	    var c = null; // codepoint
 
-	    // upgrade preset..
-	    if (preset.replacement) {
-	      var newPreset = _mainPresetIndex.item(preset.replacement);
-	      graph = actionChangePreset(entity.id, preset, newPreset, true /* skip field defaults */)(graph);
-	      entity = graph.entity(entity.id);
-	      preset = newPreset;
-	    }
+	    var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
+	    if (i + bytesPerSequence > end) break;
+	    var b1, b2, b3;
 
-	    // upgrade tags..
-	    if (_dataDeprecated) {
-	      var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
-	      if (deprecatedTags.length) {
-	        deprecatedTags.forEach(function (tag) {
-	          graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
-	        });
-	        entity = graph.entity(entity.id);
+	    if (bytesPerSequence === 1) {
+	      if (b0 < 0x80) {
+	        c = b0;
 	      }
-	    }
+	    } else if (bytesPerSequence === 2) {
+	      b1 = buf[i + 1];
 
-	    // add missing addTags..
-	    var newTags = Object.assign({}, entity.tags);  // shallow copy
-	    if (preset.tags !== preset.addTags) {
-	      Object.keys(preset.addTags).forEach(function (k) {
-	        if (!newTags[k]) {
-	          if (preset.addTags[k] === '*') {
-	            newTags[k] = 'yes';
-	          } else {
-	            newTags[k] = preset.addTags[k];
-	          }
-	        }
-	      });
-	    }
+	      if ((b1 & 0xC0) === 0x80) {
+	        c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;
 
-	    if (_nsi) {
-	      // Do `wikidata` or `wikipedia` identify this entity as a brand?  #6416
-	      // If so, these tags can be swapped to `brand:wikidata`/`brand:wikipedia`
-	      var isBrand;
-	      if (newTags.wikidata) {                 // try matching `wikidata`
-	        isBrand = _nsi.wikidata[newTags.wikidata];
-	      }
-	      if (!isBrand && newTags.wikipedia) {    // fallback to `wikipedia`
-	        isBrand = _nsi.wikipedia[newTags.wikipedia];
-	      }
-	      if (isBrand && !newTags.office) {       // but avoid doing this for corporate offices
-	        if (newTags.wikidata) {
-	          newTags['brand:wikidata'] = newTags.wikidata;
-	          delete newTags.wikidata;
+	        if (c <= 0x7F) {
+	          c = null;
 	        }
-	        if (newTags.wikipedia) {
-	          newTags['brand:wikipedia'] = newTags.wikipedia;
-	          delete newTags.wikipedia;
+	      }
+	    } else if (bytesPerSequence === 3) {
+	      b1 = buf[i + 1];
+	      b2 = buf[i + 2];
+
+	      if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
+	        c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | b2 & 0x3F;
+
+	        if (c <= 0x7FF || c >= 0xD800 && c <= 0xDFFF) {
+	          c = null;
 	        }
-	        // I considered setting `name` and other tags here, but they aren't unique per wikidata
-	        // (Q2759586 -> in USA "Papa John's", in Russia "Папа Джонс")
-	        // So users will really need to use a preset or assign `name` themselves.
 	      }
+	    } else if (bytesPerSequence === 4) {
+	      b1 = buf[i + 1];
+	      b2 = buf[i + 2];
+	      b3 = buf[i + 3];
 
-	      // try key/value|name match against name-suggestion-index
-	      if (newTags.name) {
-	        for (var i = 0; i < nsiKeys.length; i++) {
-	          var k = nsiKeys[i];
-	          if (!newTags[k]) { continue; }
+	      if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
+	        c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | b3 & 0x3F;
 
-	          var center = entity.extent(graph).center();
-	          var countryCode = iso1A2Code(center);
-	          var match = _nsi.matcher.matchKVN(k, newTags[k], newTags.name, countryCode && countryCode.toLowerCase());
-	          if (!match) { continue; }
+	        if (c <= 0xFFFF || c >= 0x110000) {
+	          c = null;
+	        }
+	      }
+	    }
 
-	          // for now skip ambiguous matches (like Target~(USA) vs Target~(Australia))
-	          if (match.d) { continue; }
+	    if (c === null) {
+	      c = 0xFFFD;
+	      bytesPerSequence = 1;
+	    } else if (c > 0xFFFF) {
+	      c -= 0x10000;
+	      str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
+	      c = 0xDC00 | c & 0x3FF;
+	    }
 
-	          var brand = _nsi.brands[match.kvnd];
-	          if (brand && brand.tags['brand:wikidata'] &&
-	            brand.tags['brand:wikidata'] !== entity.tags['not:brand:wikidata']) {
-	            subtype = 'noncanonical_brand';
+	    str += String.fromCharCode(c);
+	    i += bytesPerSequence;
+	  }
 
-	            var keepTags = ['takeaway'].reduce(function (acc, k) {
-	              if (newTags[k]) {
-	                acc[k] = newTags[k];
-	              }
-	              return acc;
-	            }, {});
+	  return str;
+	}
 
-	            nsiKeys.forEach(function (k) { return delete newTags[k]; });
-	            Object.assign(newTags, brand.tags, keepTags);
-	            break;
-	          }
+	function readUtf8TextDecoder(buf, pos, end) {
+	  return utf8TextDecoder.decode(buf.subarray(pos, end));
+	}
+
+	function writeUtf8(buf, str, pos) {
+	  for (var i = 0, c, lead; i < str.length; i++) {
+	    c = str.charCodeAt(i); // code point
+
+	    if (c > 0xD7FF && c < 0xE000) {
+	      if (lead) {
+	        if (c < 0xDC00) {
+	          buf[pos++] = 0xEF;
+	          buf[pos++] = 0xBF;
+	          buf[pos++] = 0xBD;
+	          lead = c;
+	          continue;
+	        } else {
+	          c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;
+	          lead = null;
+	        }
+	      } else {
+	        if (c > 0xDBFF || i + 1 === str.length) {
+	          buf[pos++] = 0xEF;
+	          buf[pos++] = 0xBF;
+	          buf[pos++] = 0xBD;
+	        } else {
+	          lead = c;
 	        }
+
+	        continue;
 	      }
+	    } else if (lead) {
+	      buf[pos++] = 0xEF;
+	      buf[pos++] = 0xBF;
+	      buf[pos++] = 0xBD;
+	      lead = null;
 	    }
 
-	    // determine diff
-	    var tagDiff = utilTagDiff(oldTags, newTags);
-	    if (!tagDiff.length) { return []; }
+	    if (c < 0x80) {
+	      buf[pos++] = c;
+	    } else {
+	      if (c < 0x800) {
+	        buf[pos++] = c >> 0x6 | 0xC0;
+	      } else {
+	        if (c < 0x10000) {
+	          buf[pos++] = c >> 0xC | 0xE0;
+	        } else {
+	          buf[pos++] = c >> 0x12 | 0xF0;
+	          buf[pos++] = c >> 0xC & 0x3F | 0x80;
+	        }
 
-	    var isOnlyAddingTags = tagDiff.every(function (d) { return d.type === '+'; });
+	        buf[pos++] = c >> 0x6 & 0x3F | 0x80;
+	      }
 
-	    var prefix = '';
-	    if (subtype === 'noncanonical_brand') {
-	      prefix = 'noncanonical_brand.';
-	    } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
-	      subtype = 'incomplete_tags';
-	      prefix = 'incomplete.';
+	      buf[pos++] = c & 0x3F | 0x80;
 	    }
+	  }
 
-	    // don't allow autofixing brand tags
-	    var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;
+	  return pos;
+	}
 
-	    return [new validationIssue({
-	      type: type,
-	      subtype: subtype,
-	      severity: 'warning',
-	      message: showMessage,
-	      reference: showReference,
-	      entityIds: [entity.id],
-	      hash: JSON.stringify(tagDiff),
-	      dynamicFixes: function () {
-	        return [
-	          new validationIssueFix({
-	            autoArgs: autoArgs,
-	            title: _t('issues.fix.upgrade_tags.title'),
-	            onClick: function (context) {
-	              context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
-	            }
-	          })
-	        ];
-	      }
-	    })];
+	var pointGeometry = Point;
+	/**
+	 * A standalone point geometry with useful accessor, comparison, and
+	 * modification methods.
+	 *
+	 * @class Point
+	 * @param {Number} x the x-coordinate. this could be longitude or screen
+	 * pixels, or any other sort of unit.
+	 * @param {Number} y the y-coordinate. this could be latitude or screen
+	 * pixels, or any other sort of unit.
+	 * @example
+	 * var point = new Point(-77, 38);
+	 */
 
+	function Point(x, y) {
+	  this.x = x;
+	  this.y = y;
+	}
 
-	    function doUpgrade(graph) {
-	      var currEntity = graph.hasEntity(entity.id);
-	      if (!currEntity) { return graph; }
+	Point.prototype = {
+	  /**
+	   * Clone this point, returning a new point that can be modified
+	   * without affecting the old one.
+	   * @return {Point} the clone
+	   */
+	  clone: function clone() {
+	    return new Point(this.x, this.y);
+	  },
 
-	      var newTags = Object.assign({}, currEntity.tags);  // shallow copy
-	      tagDiff.forEach(function (diff) {
-	        if (diff.type === '-') {
-	          delete newTags[diff.key];
-	        } else if (diff.type === '+') {
-	          newTags[diff.key] = diff.newVal;
-	        }
-	      });
+	  /**
+	   * Add this point's x & y coordinates to another point,
+	   * yielding a new point.
+	   * @param {Point} p the other point
+	   * @return {Point} output point
+	   */
+	  add: function add(p) {
+	    return this.clone()._add(p);
+	  },
 
-	      return actionChangeTags(currEntity.id, newTags)(graph);
+	  /**
+	   * Subtract this point's x & y coordinates to from point,
+	   * yielding a new point.
+	   * @param {Point} p the other point
+	   * @return {Point} output point
+	   */
+	  sub: function sub(p) {
+	    return this.clone()._sub(p);
+	  },
+
+	  /**
+	   * Multiply this point's x & y coordinates by point,
+	   * yielding a new point.
+	   * @param {Point} p the other point
+	   * @return {Point} output point
+	   */
+	  multByPoint: function multByPoint(p) {
+	    return this.clone()._multByPoint(p);
+	  },
+
+	  /**
+	   * Divide this point's x & y coordinates by point,
+	   * yielding a new point.
+	   * @param {Point} p the other point
+	   * @return {Point} output point
+	   */
+	  divByPoint: function divByPoint(p) {
+	    return this.clone()._divByPoint(p);
+	  },
+
+	  /**
+	   * Multiply this point's x & y coordinates by a factor,
+	   * yielding a new point.
+	   * @param {Point} k factor
+	   * @return {Point} output point
+	   */
+	  mult: function mult(k) {
+	    return this.clone()._mult(k);
+	  },
+
+	  /**
+	   * Divide this point's x & y coordinates by a factor,
+	   * yielding a new point.
+	   * @param {Point} k factor
+	   * @return {Point} output point
+	   */
+	  div: function div(k) {
+	    return this.clone()._div(k);
+	  },
+
+	  /**
+	   * Rotate this point around the 0, 0 origin by an angle a,
+	   * given in radians
+	   * @param {Number} a angle to rotate around, in radians
+	   * @return {Point} output point
+	   */
+	  rotate: function rotate(a) {
+	    return this.clone()._rotate(a);
+	  },
+
+	  /**
+	   * Rotate this point around p point by an angle a,
+	   * given in radians
+	   * @param {Number} a angle to rotate around, in radians
+	   * @param {Point} p Point to rotate around
+	   * @return {Point} output point
+	   */
+	  rotateAround: function rotateAround(a, p) {
+	    return this.clone()._rotateAround(a, p);
+	  },
+
+	  /**
+	   * Multiply this point by a 4x1 transformation matrix
+	   * @param {Array<Number>} m transformation matrix
+	   * @return {Point} output point
+	   */
+	  matMult: function matMult(m) {
+	    return this.clone()._matMult(m);
+	  },
+
+	  /**
+	   * Calculate this point but as a unit vector from 0, 0, meaning
+	   * that the distance from the resulting point to the 0, 0
+	   * coordinate will be equal to 1 and the angle from the resulting
+	   * point to the 0, 0 coordinate will be the same as before.
+	   * @return {Point} unit vector point
+	   */
+	  unit: function unit() {
+	    return this.clone()._unit();
+	  },
+
+	  /**
+	   * Compute a perpendicular point, where the new y coordinate
+	   * is the old x coordinate and the new x coordinate is the old y
+	   * coordinate multiplied by -1
+	   * @return {Point} perpendicular point
+	   */
+	  perp: function perp() {
+	    return this.clone()._perp();
+	  },
+
+	  /**
+	   * Return a version of this point with the x & y coordinates
+	   * rounded to integers.
+	   * @return {Point} rounded point
+	   */
+	  round: function round() {
+	    return this.clone()._round();
+	  },
+
+	  /**
+	   * Return the magitude of this point: this is the Euclidean
+	   * distance from the 0, 0 coordinate to this point's x and y
+	   * coordinates.
+	   * @return {Number} magnitude
+	   */
+	  mag: function mag() {
+	    return Math.sqrt(this.x * this.x + this.y * this.y);
+	  },
+
+	  /**
+	   * Judge whether this point is equal to another point, returning
+	   * true or false.
+	   * @param {Point} other the other point
+	   * @return {boolean} whether the points are equal
+	   */
+	  equals: function equals(other) {
+	    return this.x === other.x && this.y === other.y;
+	  },
+
+	  /**
+	   * Calculate the distance from this point to another point
+	   * @param {Point} p the other point
+	   * @return {Number} distance
+	   */
+	  dist: function dist(p) {
+	    return Math.sqrt(this.distSqr(p));
+	  },
+
+	  /**
+	   * Calculate the distance from this point to another point,
+	   * without the square root step. Useful if you're comparing
+	   * relative distances.
+	   * @param {Point} p the other point
+	   * @return {Number} distance
+	   */
+	  distSqr: function distSqr(p) {
+	    var dx = p.x - this.x,
+	        dy = p.y - this.y;
+	    return dx * dx + dy * dy;
+	  },
+
+	  /**
+	   * Get the angle from the 0, 0 coordinate to this point, in radians
+	   * coordinates.
+	   * @return {Number} angle
+	   */
+	  angle: function angle() {
+	    return Math.atan2(this.y, this.x);
+	  },
+
+	  /**
+	   * Get the angle from this point to another point, in radians
+	   * @param {Point} b the other point
+	   * @return {Number} angle
+	   */
+	  angleTo: function angleTo(b) {
+	    return Math.atan2(this.y - b.y, this.x - b.x);
+	  },
+
+	  /**
+	   * Get the angle between this point and another point, in radians
+	   * @param {Point} b the other point
+	   * @return {Number} angle
+	   */
+	  angleWith: function angleWith(b) {
+	    return this.angleWithSep(b.x, b.y);
+	  },
+
+	  /*
+	   * Find the angle of the two vectors, solving the formula for
+	   * the cross product a x b = |a||b|sin(θ) for θ.
+	   * @param {Number} x the x-coordinate
+	   * @param {Number} y the y-coordinate
+	   * @return {Number} the angle in radians
+	   */
+	  angleWithSep: function angleWithSep(x, y) {
+	    return Math.atan2(this.x * y - this.y * x, this.x * x + this.y * y);
+	  },
+	  _matMult: function _matMult(m) {
+	    var x = m[0] * this.x + m[1] * this.y,
+	        y = m[2] * this.x + m[3] * this.y;
+	    this.x = x;
+	    this.y = y;
+	    return this;
+	  },
+	  _add: function _add(p) {
+	    this.x += p.x;
+	    this.y += p.y;
+	    return this;
+	  },
+	  _sub: function _sub(p) {
+	    this.x -= p.x;
+	    this.y -= p.y;
+	    return this;
+	  },
+	  _mult: function _mult(k) {
+	    this.x *= k;
+	    this.y *= k;
+	    return this;
+	  },
+	  _div: function _div(k) {
+	    this.x /= k;
+	    this.y /= k;
+	    return this;
+	  },
+	  _multByPoint: function _multByPoint(p) {
+	    this.x *= p.x;
+	    this.y *= p.y;
+	    return this;
+	  },
+	  _divByPoint: function _divByPoint(p) {
+	    this.x /= p.x;
+	    this.y /= p.y;
+	    return this;
+	  },
+	  _unit: function _unit() {
+	    this._div(this.mag());
+
+	    return this;
+	  },
+	  _perp: function _perp() {
+	    var y = this.y;
+	    this.y = this.x;
+	    this.x = -y;
+	    return this;
+	  },
+	  _rotate: function _rotate(angle) {
+	    var cos = Math.cos(angle),
+	        sin = Math.sin(angle),
+	        x = cos * this.x - sin * this.y,
+	        y = sin * this.x + cos * this.y;
+	    this.x = x;
+	    this.y = y;
+	    return this;
+	  },
+	  _rotateAround: function _rotateAround(angle, p) {
+	    var cos = Math.cos(angle),
+	        sin = Math.sin(angle),
+	        x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),
+	        y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);
+	    this.x = x;
+	    this.y = y;
+	    return this;
+	  },
+	  _round: function _round() {
+	    this.x = Math.round(this.x);
+	    this.y = Math.round(this.y);
+	    return this;
+	  }
+	};
+	/**
+	 * Construct a point from an array if necessary, otherwise if the input
+	 * is already a Point, or an unknown type, return it unchanged
+	 * @param {Array<Number>|Point|*} a any kind of input value
+	 * @return {Point} constructed point, or passed-through value.
+	 * @example
+	 * // this
+	 * var point = Point.convert([0, 1]);
+	 * // is equivalent to
+	 * var point = new Point(0, 1);
+	 */
+
+	Point.convert = function (a) {
+	  if (a instanceof Point) {
+	    return a;
+	  }
+
+	  if (Array.isArray(a)) {
+	    return new Point(a[0], a[1]);
+	  }
+
+	  return a;
+	};
+
+	var vectortilefeature = VectorTileFeature;
+
+	function VectorTileFeature(pbf, end, extent, keys, values) {
+	  // Public
+	  this.properties = {};
+	  this.extent = extent;
+	  this.type = 0; // Private
+
+	  this._pbf = pbf;
+	  this._geometry = -1;
+	  this._keys = keys;
+	  this._values = values;
+	  pbf.readFields(readFeature, this, end);
+	}
+
+	function readFeature(tag, feature, pbf) {
+	  if (tag == 1) feature.id = pbf.readVarint();else if (tag == 2) readTag(pbf, feature);else if (tag == 3) feature.type = pbf.readVarint();else if (tag == 4) feature._geometry = pbf.pos;
+	}
+
+	function readTag(pbf, feature) {
+	  var end = pbf.readVarint() + pbf.pos;
+
+	  while (pbf.pos < end) {
+	    var key = feature._keys[pbf.readVarint()],
+	        value = feature._values[pbf.readVarint()];
+
+	    feature.properties[key] = value;
+	  }
+	}
+
+	VectorTileFeature.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
+
+	VectorTileFeature.prototype.loadGeometry = function () {
+	  var pbf = this._pbf;
+	  pbf.pos = this._geometry;
+	  var end = pbf.readVarint() + pbf.pos,
+	      cmd = 1,
+	      length = 0,
+	      x = 0,
+	      y = 0,
+	      lines = [],
+	      line;
+
+	  while (pbf.pos < end) {
+	    if (length <= 0) {
+	      var cmdLen = pbf.readVarint();
+	      cmd = cmdLen & 0x7;
+	      length = cmdLen >> 3;
 	    }
 
+	    length--;
 
-	    function showMessage(context) {
-	      var currEntity = context.hasEntity(entity.id);
-	      if (!currEntity) { return ''; }
+	    if (cmd === 1 || cmd === 2) {
+	      x += pbf.readSVarint();
+	      y += pbf.readSVarint();
 
-	      var messageID = "issues.outdated_tags." + prefix + "message";
-	      if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
-	        messageID += '_incomplete';
+	      if (cmd === 1) {
+	        // moveTo
+	        if (line) lines.push(line);
+	        line = [];
 	      }
-	      return _t(messageID, { feature: utilDisplayLabel(currEntity, context.graph()) });
+
+	      line.push(new pointGeometry(x, y));
+	    } else if (cmd === 7) {
+	      // Workaround for https://github.com/mapbox/mapnik-vector-tile/issues/90
+	      if (line) {
+	        line.push(line[0].clone()); // closePolygon
+	      }
+	    } else {
+	      throw new Error('unknown command ' + cmd);
+	    }
+	  }
+
+	  if (line) lines.push(line);
+	  return lines;
+	};
+
+	VectorTileFeature.prototype.bbox = function () {
+	  var pbf = this._pbf;
+	  pbf.pos = this._geometry;
+	  var end = pbf.readVarint() + pbf.pos,
+	      cmd = 1,
+	      length = 0,
+	      x = 0,
+	      y = 0,
+	      x1 = Infinity,
+	      x2 = -Infinity,
+	      y1 = Infinity,
+	      y2 = -Infinity;
+
+	  while (pbf.pos < end) {
+	    if (length <= 0) {
+	      var cmdLen = pbf.readVarint();
+	      cmd = cmdLen & 0x7;
+	      length = cmdLen >> 3;
 	    }
 
+	    length--;
 
-	    function showReference(selection) {
-	      var enter = selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter();
-
-	      enter
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t(("issues.outdated_tags." + prefix + "reference")));
-
-	      enter
-	        .append('strong')
-	        .text(_t('issues.suggested'));
-
-	      enter
-	        .append('table')
-	        .attr('class', 'tagDiff-table')
-	        .selectAll('.tagDiff-row')
-	        .data(tagDiff)
-	        .enter()
-	        .append('tr')
-	        .attr('class', 'tagDiff-row')
-	        .append('td')
-	        .attr('class', function (d) {
-	          var klass = d.type === '+' ? 'add' : 'remove';
-	          return ("tagDiff-cell tagDiff-cell-" + klass);
-	        })
-	        .text(function (d) { return d.display; });
+	    if (cmd === 1 || cmd === 2) {
+	      x += pbf.readSVarint();
+	      y += pbf.readSVarint();
+	      if (x < x1) x1 = x;
+	      if (x > x2) x2 = x;
+	      if (y < y1) y1 = y;
+	      if (y > y2) y2 = y;
+	    } else if (cmd !== 7) {
+	      throw new Error('unknown command ' + cmd);
 	    }
 	  }
 
+	  return [x1, y1, x2, y2];
+	};
 
-	  function oldMultipolygonIssues(entity, graph) {
-	    var multipolygon, outerWay;
-	    if (entity.type === 'relation') {
-	      outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
-	      multipolygon = entity;
-	    } else if (entity.type === 'way') {
-	      multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
-	      outerWay = entity;
-	    } else {
-	      return [];
+	VectorTileFeature.prototype.toGeoJSON = function (x, y, z) {
+	  var size = this.extent * Math.pow(2, z),
+	      x0 = this.extent * x,
+	      y0 = this.extent * y,
+	      coords = this.loadGeometry(),
+	      type = VectorTileFeature.types[this.type],
+	      i,
+	      j;
+
+	  function project(line) {
+	    for (var j = 0; j < line.length; j++) {
+	      var p = line[j],
+	          y2 = 180 - (p.y + y0) * 360 / size;
+	      line[j] = [(p.x + x0) * 360 / size - 180, 360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90];
 	    }
+	  }
 
-	    if (!multipolygon || !outerWay) { return []; }
+	  switch (this.type) {
+	    case 1:
+	      var points = [];
 
-	    return [new validationIssue({
-	      type: type,
-	      subtype: 'old_multipolygon',
-	      severity: 'warning',
-	      message: showMessage,
-	      reference: showReference,
-	      entityIds: [outerWay.id, multipolygon.id],
-	      dynamicFixes: function () {
-	        return [
-	          new validationIssueFix({
-	            autoArgs: [doUpgrade, _t('issues.fix.move_tags.annotation')],
-	            title: _t('issues.fix.move_tags.title'),
-	            onClick: function (context) {
-	              context.perform(doUpgrade, _t('issues.fix.move_tags.annotation'));
-	            }
-	          })
-	        ];
+	      for (i = 0; i < coords.length; i++) {
+	        points[i] = coords[i][0];
 	      }
-	    })];
 
+	      coords = points;
+	      project(coords);
+	      break;
 
-	    function doUpgrade(graph) {
-	      var currMultipolygon = graph.hasEntity(multipolygon.id);
-	      var currOuterWay = graph.hasEntity(outerWay.id);
-	      if (!currMultipolygon || !currOuterWay) { return graph; }
+	    case 2:
+	      for (i = 0; i < coords.length; i++) {
+	        project(coords[i]);
+	      }
 
-	      currMultipolygon = currMultipolygon.mergeTags(currOuterWay.tags);
-	      graph = graph.replace(currMultipolygon);
-	      return actionChangeTags(currOuterWay.id, {})(graph);
-	    }
+	      break;
 
+	    case 3:
+	      coords = classifyRings(coords);
 
-	    function showMessage(context) {
-	      var currMultipolygon = context.hasEntity(multipolygon.id);
-	      if (!currMultipolygon) { return ''; }
+	      for (i = 0; i < coords.length; i++) {
+	        for (j = 0; j < coords[i].length; j++) {
+	          project(coords[i][j]);
+	        }
+	      }
 
-	      return _t('issues.old_multipolygon.message',
-	          { multipolygon: utilDisplayLabel(currMultipolygon, context.graph()) }
-	      );
-	    }
+	      break;
+	  }
+
+	  if (coords.length === 1) {
+	    coords = coords[0];
+	  } else {
+	    type = 'Multi' + type;
+	  }
+
+	  var result = {
+	    type: "Feature",
+	    geometry: {
+	      type: type,
+	      coordinates: coords
+	    },
+	    properties: this.properties
+	  };
 
+	  if ('id' in this) {
+	    result.id = this.id;
+	  }
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.old_multipolygon.reference'));
+	  return result;
+	}; // classifies an array of rings into polygons with outer rings and holes
+
+
+	function classifyRings(rings) {
+	  var len = rings.length;
+	  if (len <= 1) return [rings];
+	  var polygons = [],
+	      polygon,
+	      ccw;
+
+	  for (var i = 0; i < len; i++) {
+	    var area = signedArea$1(rings[i]);
+	    if (area === 0) continue;
+	    if (ccw === undefined) ccw = area < 0;
+
+	    if (ccw === area < 0) {
+	      if (polygon) polygons.push(polygon);
+	      polygon = [rings[i]];
+	    } else {
+	      polygon.push(rings[i]);
 	    }
 	  }
 
+	  if (polygon) polygons.push(polygon);
+	  return polygons;
+	}
 
-	  var validation = function checkOutdatedTags(entity, graph) {
-	    var issues = oldMultipolygonIssues(entity, graph);
-	    if (!issues.length) { issues = oldTagIssues(entity, graph); }
-	    return issues;
-	  };
+	function signedArea$1(ring) {
+	  var sum = 0;
+
+	  for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
+	    p1 = ring[i];
+	    p2 = ring[j];
+	    sum += (p2.x - p1.x) * (p1.y + p2.y);
+	  }
 
+	  return sum;
+	}
 
-	  validation.type = type;
+	var vectortilelayer = VectorTileLayer;
 
-	  return validation;
+	function VectorTileLayer(pbf, end) {
+	  // Public
+	  this.version = 1;
+	  this.name = null;
+	  this.extent = 4096;
+	  this.length = 0; // Private
+
+	  this._pbf = pbf;
+	  this._keys = [];
+	  this._values = [];
+	  this._features = [];
+	  pbf.readFields(readLayer, this, end);
+	  this.length = this._features.length;
 	}
 
-	function validationPrivateData() {
-	    var type = 'private_data';
-
-	    // assume that some buildings are private
-	    var privateBuildingValues = {
-	        detached: true,
-	        farm: true,
-	        house: true,
-	        houseboat: true,
-	        residential: true,
-	        semidetached_house: true,
-	        static_caravan: true
-	    };
+	function readLayer(tag, layer, pbf) {
+	  if (tag === 15) layer.version = pbf.readVarint();else if (tag === 1) layer.name = pbf.readString();else if (tag === 5) layer.extent = pbf.readVarint();else if (tag === 2) layer._features.push(pbf.pos);else if (tag === 3) layer._keys.push(pbf.readString());else if (tag === 4) layer._values.push(readValueMessage(pbf));
+	}
 
-	    // but they might be public if they have one of these other tags
-	    var publicKeys = {
-	        amenity: true,
-	        craft: true,
-	        historic: true,
-	        leisure: true,
-	        office: true,
-	        shop: true,
-	        tourism: true
-	    };
+	function readValueMessage(pbf) {
+	  var value = null,
+	      end = pbf.readVarint() + pbf.pos;
 
-	    // these tags may contain personally identifying info
-	    var personalTags = {
-	        'contact:email': true,
-	        'contact:fax': true,
-	        'contact:phone': true,
-	        email: true,
-	        fax: true,
-	        phone: true
-	    };
+	  while (pbf.pos < end) {
+	    var tag = pbf.readVarint() >> 3;
+	    value = tag === 1 ? pbf.readString() : tag === 2 ? pbf.readFloat() : tag === 3 ? pbf.readDouble() : tag === 4 ? pbf.readVarint64() : tag === 5 ? pbf.readVarint() : tag === 6 ? pbf.readSVarint() : tag === 7 ? pbf.readBoolean() : null;
+	  }
 
+	  return value;
+	} // return feature `i` from this layer as a `VectorTileFeature`
 
-	    var validation = function checkPrivateData(entity) {
-	        var tags = entity.tags;
-	        if (!tags.building || !privateBuildingValues[tags.building]) { return []; }
 
-	        var keepTags = {};
-	        for (var k in tags) {
-	            if (publicKeys[k]) { return []; }  // probably a public feature
-	            if (!personalTags[k]) {
-	                keepTags[k] = tags[k];
-	            }
-	        }
+	VectorTileLayer.prototype.feature = function (i) {
+	  if (i < 0 || i >= this._features.length) throw new Error('feature index out of bounds');
+	  this._pbf.pos = this._features[i];
 
-	        var tagDiff = utilTagDiff(tags, keepTags);
-	        if (!tagDiff.length) { return []; }
+	  var end = this._pbf.readVarint() + this._pbf.pos;
 
-	        var fixID = tagDiff.length === 1 ? 'remove_tag' : 'remove_tags';
+	  return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
+	};
 
-	        return [new validationIssue({
-	            type: type,
-	            severity: 'warning',
-	            message: showMessage,
-	            reference: showReference,
-	            entityIds: [entity.id],
-	            dynamicFixes: function() {
-	                return [
-	                    new validationIssueFix({
-	                        icon: 'iD-operation-delete',
-	                        title: _t('issues.fix.' + fixID + '.title'),
-	                        onClick: function(context) {
-	                            context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
-	                        }
-	                    })
-	                ];
-	            }
-	        })];
+	var vectortile = VectorTile;
+
+	function VectorTile(pbf, end) {
+	  this.layers = pbf.readFields(readTile, {}, end);
+	}
+
+	function readTile(tag, layers, pbf) {
+	  if (tag === 3) {
+	    var layer = new vectortilelayer(pbf, pbf.readVarint() + pbf.pos);
+	    if (layer.length) layers[layer.name] = layer;
+	  }
+	}
 
+	var VectorTile$1 = vectortile;
+	var VectorTileFeature$1 = vectortilefeature;
+	var VectorTileLayer$1 = vectortilelayer;
+	var vectorTile = {
+	  VectorTile: VectorTile$1,
+	  VectorTileFeature: VectorTileFeature$1,
+	  VectorTileLayer: VectorTileLayer$1
+	};
 
-	        function doUpgrade(graph) {
-	            var currEntity = graph.hasEntity(entity.id);
-	            if (!currEntity) { return graph; }
+	var tiler$7 = utilTiler().tileSize(512).margin(1);
+	var dispatch$8 = dispatch('loadedData');
 
-	            var newTags = Object.assign({}, currEntity.tags);  // shallow copy
-	            tagDiff.forEach(function(diff) {
-	                if (diff.type === '-') {
-	                    delete newTags[diff.key];
-	                } else if (diff.type === '+') {
-	                    newTags[diff.key] = diff.newVal;
-	                }
-	            });
+	var _vtCache;
 
-	            return actionChangeTags(currEntity.id, newTags)(graph);
-	        }
+	function abortRequest$7(controller) {
+	  controller.abort();
+	}
 
+	function vtToGeoJSON(data, tile, mergeCache) {
+	  var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
+	  var layers = Object.keys(vectorTile$1.layers);
 
-	        function showMessage(context) {
-	            var currEntity = context.hasEntity(this.entityIds[0]);
-	            if (!currEntity) { return ''; }
+	  if (!Array.isArray(layers)) {
+	    layers = [layers];
+	  }
 
-	            return _t('issues.private_data.contact.message',
-	                { feature: utilDisplayLabel(currEntity, context.graph()) }
-	            );
-	        }
+	  var features = [];
+	  layers.forEach(function (layerID) {
+	    var layer = vectorTile$1.layers[layerID];
 
+	    if (layer) {
+	      for (var i = 0; i < layer.length; i++) {
+	        var feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+	        var geometry = feature.geometry; // Treat all Polygons as MultiPolygons
 
-	        function showReference(selection) {
-	            var enter = selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter();
+	        if (geometry.type === 'Polygon') {
+	          geometry.type = 'MultiPolygon';
+	          geometry.coordinates = [geometry.coordinates];
+	        }
 
-	            enter
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.private_data.reference'));
+	        var isClipped = false; // Clip to tile bounds
 
-	            enter
-	                .append('strong')
-	                .text(_t('issues.suggested'));
+	        if (geometry.type === 'MultiPolygon') {
+	          var featureClip = turf_bboxClip(feature, tile.extent.rectangle());
 
-	            enter
-	                .append('table')
-	                .attr('class', 'tagDiff-table')
-	                .selectAll('.tagDiff-row')
-	                .data(tagDiff)
-	                .enter()
-	                .append('tr')
-	                .attr('class', 'tagDiff-row')
-	                .append('td')
-	                .attr('class', function(d) {
-	                    var klass = d.type === '+' ? 'add' : 'remove';
-	                    return 'tagDiff-cell tagDiff-cell-' + klass;
-	                })
-	                .text(function(d) { return d.display; });
-	        }
-	    };
+	          if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
+	            // feature = featureClip;
+	            isClipped = true;
+	          }
 
+	          if (!feature.geometry.coordinates.length) continue; // not actually on this tile
 
-	    validation.type = type;
+	          if (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
+	        } // Generate some unique IDs and add some metadata
 
-	    return validation;
-	}
 
-	var _discardNameRegexes = [];
+	        var featurehash = utilHashcode(fastJsonStableStringify(feature));
+	        var propertyhash = utilHashcode(fastJsonStableStringify(feature.properties || {}));
+	        feature.__layerID__ = layerID.replace(/[^_a-zA-Z0-9\-]/g, '_');
+	        feature.__featurehash__ = featurehash;
+	        feature.__propertyhash__ = propertyhash;
+	        features.push(feature); // Clipped Polygons at same zoom with identical properties can get merged
 
-	function validationSuspiciousName() {
-	  var type = 'suspicious_name';
-	  var keysToTestForGenericValues = [
-	    'aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway',
-	    'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway'
-	  ];
+	        if (isClipped && geometry.type === 'MultiPolygon') {
+	          var merged = mergeCache[propertyhash];
 
-	  // A concern here in switching to async data means that `_nsiFilters` will not
-	  // be available at first, so the data on early tiles may not have tags validated fully.
+	          if (merged && merged.length) {
+	            var other = merged[0];
+	            var coords = union(feature.geometry.coordinates, other.geometry.coordinates);
 
-	  _mainFileFetcher.get('nsi_filters')
-	    .then(function (filters) {
-	      // known list of generic names (e.g. "bar")
-	      _discardNameRegexes = filters.discardNames
-	        .map(function (discardName) { return new RegExp(discardName, 'i'); });
-	    })
-	    .catch(function () { /* ignore */ });
+	            if (!coords || !coords.length) {
+	              continue; // something failed in martinez union
+	            }
 
+	            merged.push(feature);
 
-	  function isDiscardedSuggestionName(lowercaseName) {
-	    return _discardNameRegexes.some(function (regex) { return regex.test(lowercaseName); });
-	  }
+	            for (var j = 0; j < merged.length; j++) {
+	              // all these features get...
+	              merged[j].geometry.coordinates = coords; // same coords
 
-	  // test if the name is just the key or tag value (e.g. "park")
-	  function nameMatchesRawTag(lowercaseName, tags) {
-	    for (var i = 0; i < keysToTestForGenericValues.length; i++) {
-	      var key = keysToTestForGenericValues[i];
-	      var val = tags[key];
-	      if (val) {
-	        val = val.toLowerCase();
-	        if (key === lowercaseName ||
-	          val === lowercaseName ||
-	          key.replace(/\_/g, ' ') === lowercaseName ||
-	          val.replace(/\_/g, ' ') === lowercaseName) {
-	          return true;
+	              merged[j].__featurehash__ = featurehash; // same hash, so deduplication works
+	            }
+	          } else {
+	            mergeCache[propertyhash] = [feature];
+	          }
 	        }
 	      }
 	    }
-	    return false;
-	  }
-
-	  function isGenericName(name, tags) {
-	    name = name.toLowerCase();
-	    return nameMatchesRawTag(name, tags) || isDiscardedSuggestionName(name);
-	  }
+	  });
+	  return features;
+	}
 
-	  function makeGenericNameIssue(entityId, nameKey, genericName, langCode) {
-	    return new validationIssue({
-	      type: type,
-	      subtype: 'generic_name',
-	      severity: 'warning',
-	      message: function(context) {
-	        var entity = context.hasEntity(this.entityIds[0]);
-	        if (!entity) { return ''; }
-	        var preset = _mainPresetIndex.match(entity, context.graph());
-	        var langName = langCode && _mainLocalizer.languageName(langCode);
-	        return _t('issues.generic_name.message' + (langName ? '_language' : ''),
-	          { feature: preset.name(), name: genericName, language: langName }
-	        );
-	      },
-	      reference: showReference,
-	      entityIds: [entityId],
-	      hash: nameKey + '=' + genericName,
-	      dynamicFixes: function() {
-	        return [
-	          new validationIssueFix({
-	            icon: 'iD-operation-delete',
-	            title: _t('issues.fix.remove_the_name.title'),
-	            onClick: function(context) {
-	              var entityId = this.issue.entityIds[0];
-	              var entity = context.entity(entityId);
-	              var tags = Object.assign({}, entity.tags);   // shallow copy
-	              delete tags[nameKey];
-	              context.perform(
-	                actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation')
-	              );
-	            }
-	          })
-	        ];
-	      }
-	    });
+	function loadTile(source, tile) {
+	  if (source.loaded[tile.id] || source.inflight[tile.id]) return;
+	  var url = source.template.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]) // TMS-flipped y coordinate
+	  .replace(/\{[t-]y\}/, Math.pow(2, tile.xyz[2]) - tile.xyz[1] - 1).replace(/\{z(oom)?\}/, tile.xyz[2]).replace(/\{switch:([^}]+)\}/, function (s, r) {
+	    var subdomains = r.split(',');
+	    return subdomains[(tile.xyz[0] + tile.xyz[1]) % subdomains.length];
+	  });
+	  var controller = new AbortController();
+	  source.inflight[tile.id] = controller;
+	  fetch(url, {
+	    signal: controller.signal
+	  }).then(function (response) {
+	    if (!response.ok) {
+	      throw new Error(response.status + ' ' + response.statusText);
+	    }
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.generic_name.reference'));
+	    source.loaded[tile.id] = [];
+	    delete source.inflight[tile.id];
+	    return response.arrayBuffer();
+	  }).then(function (data) {
+	    if (!data) {
+	      throw new Error('No Data');
 	    }
-	  }
 
-	  function makeIncorrectNameIssue(entityId, nameKey, incorrectName, langCode) {
-	    return new validationIssue({
-	      type: type,
-	      subtype: 'not_name',
-	      severity: 'warning',
-	      message: function(context) {
-	        var entity = context.hasEntity(this.entityIds[0]);
-	        if (!entity) { return ''; }
-	        var preset = _mainPresetIndex.match(entity, context.graph());
-	        var langName = langCode && _mainLocalizer.languageName(langCode);
-	        return _t('issues.incorrect_name.message' + (langName ? '_language' : ''),
-	          { feature: preset.name(), name: incorrectName, language: langName }
-	        );
-	      },
-	      reference: showReference,
-	      entityIds: [entityId],
-	      hash: nameKey + '=' + incorrectName,
-	      dynamicFixes: function() {
-	        return [
-	          new validationIssueFix({
-	            icon: 'iD-operation-delete',
-	            title: _t('issues.fix.remove_the_name.title'),
-	            onClick: function(context) {
-	              var entityId = this.issue.entityIds[0];
-	              var entity = context.entity(entityId);
-	              var tags = Object.assign({}, entity.tags);   // shallow copy
-	              delete tags[nameKey];
-	              context.perform(
-	                actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation')
-	              );
-	            }
-	          })
-	        ];
-	      }
-	    });
+	    var z = tile.xyz[2];
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.generic_name.reference'));
+	    if (!source.canMerge[z]) {
+	      source.canMerge[z] = {}; // initialize mergeCache
 	    }
-	  }
-
 
-	  var validation = function checkGenericName(entity) {
-	    // a generic name is okay if it's a known brand or entity
-	    if (entity.hasWikidata()) { return []; }
+	    source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
+	    dispatch$8.call('loadedData');
+	  })["catch"](function () {
+	    source.loaded[tile.id] = [];
+	    delete source.inflight[tile.id];
+	  });
+	}
 
-	    var issues = [];
-	    var notNames = (entity.tags['not:name'] || '').split(';');
+	var serviceVectorTile = {
+	  init: function init() {
+	    if (!_vtCache) {
+	      this.reset();
+	    }
 
-	    for (var key in entity.tags) {
-	      var m = key.match(/^name(?:(?::)([a-zA-Z_-]+))?$/);
-	      if (!m) { continue; }
+	    this.event = utilRebind(this, dispatch$8, 'on');
+	  },
+	  reset: function reset() {
+	    for (var sourceID in _vtCache) {
+	      var source = _vtCache[sourceID];
 
-	      var langCode = m.length >= 2 ? m[1] : null;
-	      var value = entity.tags[key];
-	      if (notNames.length) {
-	        for (var i in notNames) {
-	          var notName = notNames[i];
-	          if (notName && value === notName) {
-	            issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
-	            continue;
-	          }
-	        }
-	      }
-	      if (isGenericName(value, entity.tags)) {
-	        issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
+	      if (source && source.inflight) {
+	        Object.values(source.inflight).forEach(abortRequest$7);
 	      }
 	    }
 
-	    return issues;
-	  };
-
+	    _vtCache = {};
+	  },
+	  addSource: function addSource(sourceID, template) {
+	    _vtCache[sourceID] = {
+	      template: template,
+	      inflight: {},
+	      loaded: {},
+	      canMerge: {}
+	    };
+	    return _vtCache[sourceID];
+	  },
+	  data: function data(sourceID, projection) {
+	    var source = _vtCache[sourceID];
+	    if (!source) return [];
+	    var tiles = tiler$7.getTiles(projection);
+	    var seen = {};
+	    var results = [];
 
-	  validation.type = type;
+	    for (var i = 0; i < tiles.length; i++) {
+	      var features = source.loaded[tiles[i].id];
+	      if (!features || !features.length) continue;
 
-	  return validation;
-	}
+	      for (var j = 0; j < features.length; j++) {
+	        var feature = features[j];
+	        var hash = feature.__featurehash__;
+	        if (seen[hash]) continue;
+	        seen[hash] = true; // return a shallow copy, because the hash may change
+	        // later if this feature gets merged with another
 
-	function validationUnsquareWay(context) {
-	    var type = 'unsquare_way';
-	    var DEFAULT_DEG_THRESHOLD = 5;   // see also issues.js
+	        results.push(Object.assign({}, feature)); // shallow copy
+	      }
+	    }
 
-	    // use looser epsilon for detection to reduce warnings of buildings that are essentially square already
-	    var epsilon = 0.05;
-	    var nodeThreshold = 10;
+	    return results;
+	  },
+	  loadTiles: function loadTiles(sourceID, template, projection) {
+	    var source = _vtCache[sourceID];
 
-	    function isBuilding(entity, graph) {
-	        if (entity.type !== 'way' || entity.geometry(graph) !== 'area') { return false; }
-	        return entity.tags.building && entity.tags.building !== 'no';
+	    if (!source) {
+	      source = this.addSource(sourceID, template);
 	    }
 
+	    var tiles = tiler$7.getTiles(projection); // abort inflight requests that are no longer needed
 
-	    var validation = function checkUnsquareWay(entity, graph) {
-
-	        if (!isBuilding(entity, graph)) { return []; }
+	    Object.keys(source.inflight).forEach(function (k) {
+	      var wanted = tiles.find(function (tile) {
+	        return k === tile.id;
+	      });
 
-	        // don't flag ways marked as physically unsquare
-	        if (entity.tags.nonsquare === 'yes') { return []; }
+	      if (!wanted) {
+	        abortRequest$7(source.inflight[k]);
+	        delete source.inflight[k];
+	      }
+	    });
+	    tiles.forEach(function (tile) {
+	      loadTile(source, tile);
+	    });
+	  },
+	  cache: function cache() {
+	    return _vtCache;
+	  }
+	};
 
-	        var isClosed = entity.isClosed();
-	        if (!isClosed) { return []; }        // this building has bigger problems
+	var apibase$3 = 'https://www.wikidata.org/w/api.php?';
+	var _wikidataCache = {};
+	var serviceWikidata = {
+	  init: function init() {},
+	  reset: function reset() {
+	    _wikidataCache = {};
+	  },
+	  // Search for Wikidata items matching the query
+	  itemsForSearchQuery: function itemsForSearchQuery(query, callback) {
+	    if (!query) {
+	      if (callback) callback('No query', {});
+	      return;
+	    }
 
-	        // don't flag ways with lots of nodes since they are likely detail-mapped
-	        var nodes = graph.childNodes(entity).slice();    // shallow copy
-	        if (nodes.length > nodeThreshold + 1) { return []; }   // +1 because closing node appears twice
+	    var lang = this.languagesToQuery()[0];
+	    var url = apibase$3 + utilQsString({
+	      action: 'wbsearchentities',
+	      format: 'json',
+	      formatversion: 2,
+	      search: query,
+	      type: 'item',
+	      // the language to search
+	      language: lang,
+	      // the language for the label and description in the result
+	      uselang: lang,
+	      limit: 10,
+	      origin: '*'
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	        // ignore if not all nodes are fully downloaded
-	        var osm = services.osm;
-	        if (!osm || nodes.some(function(node) { return !osm.isDataLoaded(node.loc); })) { return []; }
-
-	        // don't flag connected ways to avoid unresolvable unsquare loops
-	        var hasConnectedSquarableWays = nodes.some(function(node) {
-	            return graph.parentWays(node).some(function(way) {
-	                if (way.id === entity.id) { return false; }
-	                if (isBuilding(way, graph)) { return true; }
-	                return graph.parentRelations(way).some(function(parentRelation) {
-	                    return parentRelation.isMultipolygon() &&
-	                        parentRelation.tags.building &&
-	                        parentRelation.tags.building !== 'no';
-	                });
-	            });
-	        });
-	        if (hasConnectedSquarableWays) { return []; }
+	      if (callback) callback(null, result.search || {});
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message, {});
+	    });
+	  },
+	  // Given a Wikipedia language and article title,
+	  // return an array of corresponding Wikidata entities.
+	  itemsByTitle: function itemsByTitle(lang, title, callback) {
+	    if (!title) {
+	      if (callback) callback('No title', {});
+	      return;
+	    }
 
+	    lang = lang || 'en';
+	    var url = apibase$3 + utilQsString({
+	      action: 'wbgetentities',
+	      format: 'json',
+	      formatversion: 2,
+	      sites: lang.replace(/-/g, '_') + 'wiki',
+	      titles: title,
+	      languages: 'en',
+	      // shrink response by filtering to one language
+	      origin: '*'
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	        // user-configurable square threshold
-	        var storedDegreeThreshold = corePreferences('validate-square-degrees');
-	        var degreeThreshold = isNaN(storedDegreeThreshold) ? DEFAULT_DEG_THRESHOLD : parseFloat(storedDegreeThreshold);
+	      if (callback) callback(null, result.entities || {});
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message, {});
+	    });
+	  },
+	  languagesToQuery: function languagesToQuery() {
+	    return _mainLocalizer.localeCodes().map(function (code) {
+	      return code.toLowerCase();
+	    }).filter(function (code) {
+	      // HACK: en-us isn't a wikidata language. We should really be filtering by
+	      // the languages known to be supported by wikidata.
+	      return code !== 'en-us';
+	    });
+	  },
+	  entityByQID: function entityByQID(qid, callback) {
+	    if (!qid) {
+	      callback('No qid', {});
+	      return;
+	    }
 
-	        var points = nodes.map(function(node) { return context.projection(node.loc); });
-	        if (!geoOrthoCanOrthogonalize(points, isClosed, epsilon, degreeThreshold, true)) { return []; }
+	    if (_wikidataCache[qid]) {
+	      if (callback) callback(null, _wikidataCache[qid]);
+	      return;
+	    }
 
-	        var autoArgs;
-	        // don't allow autosquaring features linked to wikidata
-	        if (!entity.tags.wikidata) {
-	            // use same degree threshold as for detection
-	            var autoAction = actionOrthogonalize(entity.id, context.projection, undefined, degreeThreshold);
-	            autoAction.transitionable = false;  // when autofixing, do it instantly
-	            autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature.single')];
-	        }
+	    var langs = this.languagesToQuery();
+	    var url = apibase$3 + utilQsString({
+	      action: 'wbgetentities',
+	      format: 'json',
+	      formatversion: 2,
+	      ids: qid,
+	      props: 'labels|descriptions|claims|sitelinks',
+	      sitefilter: langs.map(function (d) {
+	        return d + 'wiki';
+	      }).join('|'),
+	      languages: langs.join('|'),
+	      languagefallback: 1,
+	      origin: '*'
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      }
 
-	        return [new validationIssue({
-	            type: type,
-	            subtype: 'building',
-	            severity: 'warning',
-	            message: function(context) {
-	                var entity = context.hasEntity(this.entityIds[0]);
-	                return entity ? _t('issues.unsquare_way.message', { feature: utilDisplayLabel(entity, context.graph()) }) : '';
-	            },
-	            reference: showReference,
-	            entityIds: [entity.id],
-	            hash: JSON.stringify(autoArgs !== undefined) + degreeThreshold,
-	            dynamicFixes: function() {
-	                return [
-	                    new validationIssueFix({
-	                        icon: 'iD-operation-orthogonalize',
-	                        title: _t('issues.fix.square_feature.title'),
-	                        autoArgs: autoArgs,
-	                        onClick: function(context, completionHandler) {
-	                            var entityId = this.issue.entityIds[0];
-	                            // use same degree threshold as for detection
-	                            context.perform(
-	                                actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold),
-	                                _t('operations.orthogonalize.annotation.feature.single')
-	                            );
-	                            // run after the squaring transition (currently 150ms)
-	                            window.setTimeout(function() { completionHandler(); }, 175);
-	                        }
-	                    }) ];
-	            }
-	        })];
+	      if (callback) callback(null, result.entities[qid] || {});
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message, {});
+	    });
+	  },
+	  // Pass `params` object of the form:
+	  // {
+	  //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+	  // }
+	  //
+	  // Get an result object used to display tag documentation
+	  // {
+	  //   title:        'string',
+	  //   description:  'string',
+	  //   editURL:      'string',
+	  //   imageURL:     'string',
+	  //   wiki:         { title: 'string', text: 'string', url: 'string' }
+	  // }
+	  //
+	  getDocs: function getDocs(params, callback) {
+	    var langs = this.languagesToQuery();
+	    this.entityByQID(params.qid, function (err, entity) {
+	      if (err || !entity) {
+	        callback(err || 'No entity');
+	        return;
+	      }
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.unsquare_way.buildings.reference'));
-	        }
-	    };
+	      var i;
+	      var description;
 
-	    validation.type = type;
+	      for (i in langs) {
+	        var code = langs[i];
 
-	    return validation;
-	}
+	        if (entity.descriptions[code] && entity.descriptions[code].language === code) {
+	          description = entity.descriptions[code];
+	          break;
+	        }
+	      }
 
-	var Validations = /*#__PURE__*/Object.freeze({
-		__proto__: null,
-		validationAlmostJunction: validationAlmostJunction,
-		validationCloseNodes: validationCloseNodes,
-		validationCrossingWays: validationCrossingWays,
-		validationDisconnectedWay: validationDisconnectedWay,
-		validationFormatting: validationFormatting,
-		validationHelpRequest: validationHelpRequest,
-		validationImpossibleOneway: validationImpossibleOneway,
-		validationIncompatibleSource: validationIncompatibleSource,
-		validationMaprules: validationMaprules,
-		validationMismatchedGeometry: validationMismatchedGeometry,
-		validationMissingRole: validationMissingRole,
-		validationMissingTag: validationMissingTag,
-		validationOutdatedTags: validationOutdatedTags,
-		validationPrivateData: validationPrivateData,
-		validationSuspiciousName: validationSuspiciousName,
-		validationUnsquareWay: validationUnsquareWay
-	});
+	      if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-	function coreValidator(context) {
-	    var dispatch$1 = dispatch('validated', 'focusedIssue');
-	    var validator = utilRebind({}, dispatch$1, 'on');
+	      var result = {
+	        title: entity.id,
+	        description: description ? description.value : '',
+	        descriptionLocaleCode: description ? description.language : '',
+	        editURL: 'https://www.wikidata.org/wiki/' + entity.id
+	      }; // add image
 
-	    var _rules = {};
-	    var _disabledRules = {};
+	      if (entity.claims) {
+	        var imageroot = 'https://commons.wikimedia.org/w/index.php';
+	        var props = ['P154', 'P18']; // logo image, image
 
-	    var _ignoredIssueIDs = {};          // issue.id -> true
-	    var _baseCache = validationCache(); // issues before any user edits
-	    var _headCache = validationCache(); // issues after all user edits
-	    var _validatedGraph = null;
-	    var _deferred = new Set();
+	        var prop, image;
 
-	    //
-	    // initialize the validator rulesets
-	    //
-	    validator.init = function() {
-	        Object.values(Validations).forEach(function(validation) {
-	            if (typeof validation !== 'function') { return; }
+	        for (i = 0; i < props.length; i++) {
+	          prop = entity.claims[props[i]];
 
-	            var fn = validation(context);
-	            var key = fn.type;
-	            _rules[key] = fn;
-	        });
+	          if (prop && Object.keys(prop).length > 0) {
+	            image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
 
-	        var disabledRules = corePreferences('validate-disabledRules');
-	        if (disabledRules) {
-	            disabledRules.split(',')
-	                .forEach(function(key) { _disabledRules[key] = true; });
+	            if (image) {
+	              result.imageURL = imageroot + '?' + utilQsString({
+	                title: 'Special:Redirect/file/' + image,
+	                width: 400
+	              });
+	              break;
+	            }
+	          }
 	        }
-	    };
-
-
-	    //
-	    // clear caches, called whenever iD resets after a save
-	    //
-	    validator.reset = function() {
-	        Array.from(_deferred).forEach(function(handle) {
-	            window.cancelIdleCallback(handle);
-	            _deferred.delete(handle);
-	        });
-
-	        // clear caches
-	        _ignoredIssueIDs = {};
-	        _baseCache = validationCache();
-	        _headCache = validationCache();
-	        _validatedGraph = null;
-	    };
-
-	    validator.resetIgnoredIssues = function() {
-	        _ignoredIssueIDs = {};
-	        // reload UI
-	        dispatch$1.call('validated');
-	    };
+	      }
 
+	      if (entity.sitelinks) {
+	        var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en'; // must be one of these that we requested..
 
-	    // must update issues when the user changes the unsquare thereshold
-	    validator.reloadUnsquareIssues = function() {
+	        for (i = 0; i < langs.length; i++) {
+	          // check each, in order of preference
+	          var w = langs[i] + 'wiki';
 
-	        reloadUnsquareIssues(_headCache, context.graph());
-	        reloadUnsquareIssues(_baseCache, context.history().base());
+	          if (entity.sitelinks[w]) {
+	            var title = entity.sitelinks[w].title;
+	            var tKey = 'inspector.wiki_reference';
 
-	        dispatch$1.call('validated');
-	    };
+	            if (!englishLocale && langs[i] === 'en') {
+	              // user's locale isn't English but
+	              tKey = 'inspector.wiki_en_reference'; // we are sending them to enwiki anyway..
+	            }
 
-	    function reloadUnsquareIssues(cache, graph) {
+	            result.wiki = {
+	              title: title,
+	              text: tKey,
+	              url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
+	            };
+	            break;
+	          }
+	        }
+	      }
 
-	        var checkUnsquareWay = _rules.unsquare_way;
-	        if (typeof checkUnsquareWay !== 'function') { return; }
+	      callback(null, result);
+	    });
+	  }
+	};
 
-	        // uncache existing
-	        cache.uncacheIssuesOfType('unsquare_way');
+	var endpoint = 'https://en.wikipedia.org/w/api.php?';
+	var serviceWikipedia = {
+	  init: function init() {},
+	  reset: function reset() {},
+	  search: function search(lang, query, callback) {
+	    if (!query) {
+	      if (callback) callback('No Query', []);
+	      return;
+	    }
 
-	        var buildings = context.history().tree().intersects(geoExtent([-180,-90],[180, 90]), graph)  // everywhere
-	            .filter(function(entity) {
-	                return entity.type === 'way' && entity.tags.building && entity.tags.building !== 'no';
-	            });
+	    lang = lang || 'en';
+	    var url = endpoint.replace('en', lang) + utilQsString({
+	      action: 'query',
+	      list: 'search',
+	      srlimit: '10',
+	      srinfo: 'suggestion',
+	      format: 'json',
+	      origin: '*',
+	      srsearch: query
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      } else if (!result || !result.query || !result.query.search) {
+	        throw new Error('No Results');
+	      }
 
-	        // rerun for all buildings
-	        buildings.forEach(function(entity) {
-	            var detected = checkUnsquareWay(entity, graph);
-	            if (detected.length !== 1) { return; }
-	            var issue = detected[0];
-	            if (!cache.issuesByEntityID[entity.id]) {
-	                cache.issuesByEntityID[entity.id] = new Set();
-	            }
-	            cache.issuesByEntityID[entity.id].add(issue.id);
-	            cache.issuesByIssueID[issue.id] = issue;
+	      if (callback) {
+	        var titles = result.query.search.map(function (d) {
+	          return d.title;
 	        });
+	        callback(null, titles);
+	      }
+	    })["catch"](function (err) {
+	      if (callback) callback(err, []);
+	    });
+	  },
+	  suggestions: function suggestions(lang, query, callback) {
+	    if (!query) {
+	      if (callback) callback('', []);
+	      return;
 	    }
 
-	    // options = {
-	    //     what: 'all',     // 'all' or 'edited'
-	    //     where: 'all',   // 'all' or 'visible'
-	    //     includeIgnored: false   // true, false, or 'only'
-	    //     includeDisabledRules: false   // true, false, or 'only'
-	    // };
-	    validator.getIssues = function(options) {
-	        var opts = Object.assign({ what: 'all', where: 'all', includeIgnored: false, includeDisabledRules: false }, options);
-	        var issues = Object.values(_headCache.issuesByIssueID);
-	        var view = context.map().extent();
-
-	        return issues.filter(function(issue) {
-	            if (!issue) { return false; }
-	            if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) { return false; }
-	            if (!opts.includeDisabledRules && _disabledRules[issue.type]) { return false; }
-
-	            if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) { return false; }
-	            if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) { return false; }
-
-	            // Sanity check:  This issue may be for an entity that not longer exists.
-	            // If we detect this, uncache and return false so it is not included..
-	            var entityIds = issue.entityIds || [];
-	            for (var i = 0; i < entityIds.length; i++) {
-	                var entityId = entityIds[i];
-	                if (!context.hasEntity(entityId)) {
-	                    delete _headCache.issuesByEntityID[entityId];
-	                    delete _headCache.issuesByIssueID[issue.id];
-	                    return false;
-	                }
-	            }
-
-	            if (opts.what === 'edited' && _baseCache.issuesByIssueID[issue.id]) { return false; }
-
-	            if (opts.where === 'visible') {
-	                var extent = issue.extent(context.graph());
-	                if (!view.intersects(extent)) { return false; }
-	            }
+	    lang = lang || 'en';
+	    var url = endpoint.replace('en', lang) + utilQsString({
+	      action: 'opensearch',
+	      namespace: 0,
+	      suggest: '',
+	      format: 'json',
+	      origin: '*',
+	      search: query
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      } else if (!result || result.length < 2) {
+	        throw new Error('No Results');
+	      }
 
-	            return true;
-	        });
-	    };
+	      if (callback) callback(null, result[1] || []);
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message, []);
+	    });
+	  },
+	  translations: function translations(lang, title, callback) {
+	    if (!title) {
+	      if (callback) callback('No Title');
+	      return;
+	    }
 
-	    validator.getResolvedIssues = function() {
-	        var baseIssues = Object.values(_baseCache.issuesByIssueID);
-	        return baseIssues.filter(function(issue) {
-	            return !_headCache.issuesByIssueID[issue.id];
-	        });
-	    };
+	    var url = endpoint.replace('en', lang) + utilQsString({
+	      action: 'query',
+	      prop: 'langlinks',
+	      format: 'json',
+	      origin: '*',
+	      lllimit: 500,
+	      titles: title
+	    });
+	    d3_json(url).then(function (result) {
+	      if (result && result.error) {
+	        throw new Error(result.error);
+	      } else if (!result || !result.query || !result.query.pages) {
+	        throw new Error('No Results');
+	      }
 
-	    validator.focusIssue = function(issue) {
-	        var extent = issue.extent(context.graph());
+	      if (callback) {
+	        var list = result.query.pages[Object.keys(result.query.pages)[0]];
+	        var translations = {};
 
-	        if (extent) {
-	            var setZoom = Math.max(context.map().zoom(), 19);
-	            context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
-
-	            // select the first entity
-	            if (issue.entityIds && issue.entityIds.length) {
-	                window.setTimeout(function() {
-	                    var ids = issue.entityIds;
-	                    context.enter(modeSelect(context, [ids[0]]));
-	                    dispatch$1.call('focusedIssue', this, issue);
-	                }, 250);  // after ease
-	            }
+	        if (list && list.langlinks) {
+	          list.langlinks.forEach(function (d) {
+	            translations[d.lang] = d['*'];
+	          });
 	        }
-	    };
 
+	        callback(null, translations);
+	      }
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message);
+	    });
+	  }
+	};
 
-	    validator.getIssuesBySeverity = function(options) {
-	        var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
-	        groups.error = groups.error || [];
-	        groups.warning = groups.warning || [];
-	        return groups;
-	    };
+	var services = {
+	  geocoder: serviceNominatim,
+	  keepRight: serviceKeepRight,
+	  improveOSM: serviceImproveOSM,
+	  osmose: serviceOsmose,
+	  mapillary: serviceMapillary,
+	  openstreetcam: serviceOpenstreetcam,
+	  osm: serviceOsm,
+	  osmWikibase: serviceOsmWikibase,
+	  maprules: serviceMapRules,
+	  streetside: serviceStreetside,
+	  taginfo: serviceTaginfo,
+	  vectorTile: serviceVectorTile,
+	  wikidata: serviceWikidata,
+	  wikipedia: serviceWikipedia
+	};
 
-	    // show some issue types in a particular order
-	    var orderedIssueTypes = [
-	        // flag missing data first
-	        'missing_tag', 'missing_role',
-	        // then flag identity issues
-	        'outdated_tags', 'mismatched_geometry',
-	        // flag geometry issues where fixing them might solve connectivity issues
-	        'crossing_ways', 'almost_junction',
-	        // then flag connectivity issues
-	        'disconnected_way', 'impossible_oneway'
-	    ];
-
-	    // returns the issues that the given entity IDs have in common, matching the given options
-	    validator.getSharedEntityIssues = function(entityIDs, options) {
-	        var cache = _headCache;
-
-	        // gather the issues that are common to all the entities
-	        var issueIDs = entityIDs.reduce(function(acc, entityID) {
-	            var entityIssueIDs = cache.issuesByEntityID[entityID] || new Set();
-	            if (!acc) {
-	                return new Set(entityIssueIDs);
-	            }
-	            return new Set([].concat( acc ).filter(function(elem) {
-	                return entityIssueIDs.has(elem);
-	            }));
-	        }, null) || [];
+	function svgIcon(name, svgklass, useklass) {
+	  return function drawIcon(selection) {
+	    selection.selectAll('svg.icon' + (svgklass ? '.' + svgklass.split(' ')[0] : '')).data([0]).enter().append('svg').attr('class', 'icon ' + (svgklass || '')).append('use').attr('xlink:href', name).attr('class', useklass);
+	  };
+	}
 
-	        var opts = options || {};
+	function uiNoteComments() {
+	  var _note;
+
+	  function noteComments(selection) {
+	    if (_note.isNew()) return; // don't draw .comments-container
+
+	    var comments = selection.selectAll('.comments-container').data([0]);
+	    comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments);
+	    var commentEnter = comments.selectAll('.comment').data(_note.comments).enter().append('div').attr('class', 'comment');
+	    commentEnter.append('div').attr('class', function (d) {
+	      return 'comment-avatar user-' + d.uid;
+	    }).call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+	    var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
+	    var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
+	    metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
+	      var selection = select(this);
+	      var osm = services.osm;
 
-	        return Array.from(issueIDs)
-	            .map(function(id) { return cache.issuesByIssueID[id]; })
-	            .filter(function(issue) {
-	                if (!issue) { return false; }
-	                if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) { return false; }
-	                if (!opts.includeDisabledRules && _disabledRules[issue.type]) { return false; }
+	      if (osm && d.user) {
+	        selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
+	      }
 
-	                if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) { return false; }
-	                if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) { return false; }
+	      selection.html(function (d) {
+	        return d.user || _t.html('note.anonymous');
+	      });
+	    });
+	    metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+	      return _t('note.status.' + d.action, {
+	        when: localeDateString(d.date)
+	      });
+	    });
+	    mainEnter.append('div').attr('class', 'comment-text').html(function (d) {
+	      return d.html;
+	    }).selectAll('a').attr('rel', 'noopener nofollow').attr('target', '_blank');
+	    comments.call(replaceAvatars);
+	  }
 
-	                return true;
-	            }).sort(function(issue1, issue2) {
-	                if (issue1.type === issue2.type) {
-	                    // issues of the same type, sort deterministically
-	                    return issue1.id < issue2.id ? -1 : 1;
-	                }
-	                var index1 = orderedIssueTypes.indexOf(issue1.type);
-	                var index2 = orderedIssueTypes.indexOf(issue2.type);
-	                if (index1 !== -1 && index2 !== -1) {
-	                    // both issue types have explicit sort orders
-	                    return index1 - index2;
-	                } else if (index1 === -1 && index2 === -1) {
-	                    // neither issue type has an explicit sort order, sort by type
-	                    return issue1.type < issue2.type ? -1 : 1;
-	                } else {
-	                    // order explicit types before everything else
-	                    return index1 !== -1 ? -1 : 1;
-	                }
-	            });
-	    };
+	  function replaceAvatars(selection) {
+	    var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+	    var osm = services.osm;
+	    if (showThirdPartyIcons !== 'true' || !osm) return;
+	    var uids = {}; // gather uids in the comment thread
+
+	    _note.comments.forEach(function (d) {
+	      if (d.uid) uids[d.uid] = true;
+	    });
 
+	    Object.keys(uids).forEach(function (uid) {
+	      osm.loadUser(uid, function (err, user) {
+	        if (!user || !user.image_url) return;
+	        selection.selectAll('.comment-avatar.user-' + uid).html('').append('img').attr('class', 'icon comment-avatar-icon').attr('src', user.image_url).attr('alt', user.display_name);
+	      });
+	    });
+	  }
 
-	    validator.getEntityIssues = function(entityID, options) {
-	        return validator.getSharedEntityIssues([entityID], options);
+	  function localeDateString(s) {
+	    if (!s) return null;
+	    var options = {
+	      day: 'numeric',
+	      month: 'short',
+	      year: 'numeric'
 	    };
+	    s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
 
+	    var d = new Date(s);
+	    if (isNaN(d.getTime())) return null;
+	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  }
 
-	    validator.getRuleKeys = function() {
-	        return Object.keys(_rules);
-	    };
+	  noteComments.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteComments;
+	  };
 
+	  return noteComments;
+	}
 
-	    validator.isRuleEnabled = function(key) {
-	        return !_disabledRules[key];
-	    };
+	function uiNoteHeader() {
+	  var _note;
 
+	  function noteHeader(selection) {
+	    var header = selection.selectAll('.note-header').data(_note ? [_note] : [], function (d) {
+	      return d.status + d.id;
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'note-header');
+	    var iconEnter = headerEnter.append('div').attr('class', function (d) {
+	      return 'note-header-icon ' + d.status;
+	    }).classed('new', function (d) {
+	      return d.id < 0;
+	    });
+	    iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-note', 'note-fill'));
+	    iconEnter.each(function (d) {
+	      var statusIcon = '#iD-icon-' + (d.id < 0 ? 'plus' : d.status === 'open' ? 'close' : 'apply');
+	      iconEnter.append('div').attr('class', 'note-icon-annotation').call(svgIcon(statusIcon, 'icon-annotation'));
+	    });
+	    headerEnter.append('div').attr('class', 'note-header-label').html(function (d) {
+	      if (_note.isNew()) {
+	        return _t('note.new');
+	      }
 
-	    validator.toggleRule = function(key) {
-	        if (_disabledRules[key]) {
-	            delete _disabledRules[key];
-	        } else {
-	            _disabledRules[key] = true;
-	        }
+	      return _t('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t('note.closed') : '');
+	    });
+	  }
 
-	        corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-	        validator.validate();
-	    };
+	  noteHeader.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteHeader;
+	  };
 
+	  return noteHeader;
+	}
 
-	    validator.disableRules = function(keys) {
-	        _disabledRules = {};
-	        keys.forEach(function(k) {
-	            _disabledRules[k] = true;
-	        });
+	function uiNoteReport() {
+	  var _note;
 
-	        corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-	        validator.validate();
-	    };
+	  function noteReport(selection) {
+	    var url;
 
+	    if (services.osm && _note instanceof osmNote && !_note.isNew()) {
+	      url = services.osm.noteReportURL(_note);
+	    }
 
-	    validator.ignoreIssue = function(id) {
-	        _ignoredIssueIDs[id] = true;
-	    };
+	    var link = selection.selectAll('.note-report').data(url ? [url] : []); // exit
 
+	    link.exit().remove(); // enter
 
-	    //
-	    // Run validation on a single entity for the given graph
-	    //
-	    function validateEntity(entity, graph) {
-	        var entityIssues = [];
+	    var linkEnter = link.enter().append('a').attr('class', 'note-report').attr('target', '_blank').attr('href', function (d) {
+	      return d;
+	    }).call(svgIcon('#iD-icon-out-link', 'inline'));
+	    linkEnter.append('span').html(_t.html('note.report'));
+	  }
 
-	        // runs validation and appends resulting issues
-	        function runValidation(key) {
+	  noteReport.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteReport;
+	  };
 
-	            var fn = _rules[key];
-	            if (typeof fn !== 'function') {
-	                console.error('no such validation rule = ' + key);  // eslint-disable-line no-console
-	                return;
-	            }
+	  return noteReport;
+	}
+
+	function uiViewOnOSM(context) {
+	  var _what; // an osmEntity or osmNote
 
-	            var detected = fn(entity, graph);
-	            entityIssues = entityIssues.concat(detected);
-	        }
 
-	        // run all rules
-	        Object.keys(_rules).forEach(runValidation);
+	  function viewOnOSM(selection) {
+	    var url;
 
-	        return entityIssues;
+	    if (_what instanceof osmEntity) {
+	      url = context.connection().entityURL(_what);
+	    } else if (_what instanceof osmNote) {
+	      url = context.connection().noteURL(_what);
 	    }
 
-	    function entityIDsToValidate(entityIDs, graph) {
-	        var processedIDs = new Set();
-	        return entityIDs.reduce(function(acc, entityID) {
-	            // keep redundancy check separate from `acc` because an `entityID`
-	            // could have been added to `acc` as a related entity through an earlier pass
-	            if (processedIDs.has(entityID)) { return acc; }
-	            processedIDs.add(entityID);
+	    var data = !_what || _what.isNew() ? [] : [_what];
+	    var link = selection.selectAll('.view-on-osm').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	            var entity = graph.hasEntity(entityID);
-	            if (!entity) { return acc; }
+	    link.exit().remove(); // enter
 
-	            acc.add(entityID);
+	    var linkEnter = link.enter().append('a').attr('class', 'view-on-osm').attr('target', '_blank').attr('href', url).call(svgIcon('#iD-icon-out-link', 'inline'));
+	    linkEnter.append('span').html(_t.html('inspector.view_on_osm'));
+	  }
 
-	            var checkParentRels = [entity];
+	  viewOnOSM.what = function (_) {
+	    if (!arguments.length) return _what;
+	    _what = _;
+	    return viewOnOSM;
+	  };
 
-	            if (entity.type === 'node') {
-	                graph.parentWays(entity).forEach(function(parentWay) {
-	                    acc.add(parentWay.id); // include parent ways
-	                    checkParentRels.push(parentWay);
-	                });
-	            } else if (entity.type === 'relation') {
-	                entity.members.forEach(function(member) {
-	                    acc.add(member.id); // include members
-	                });
-	            } else if (entity.type === 'way') {
-	                entity.nodes.forEach(function(nodeID) {
-	                    acc.add(nodeID); // include child nodes
-	                    graph._parentWays[nodeID].forEach(function(wayID) {
-	                        acc.add(wayID); // include connected ways
-	                    });
-	                });
-	            }
+	  return viewOnOSM;
+	}
 
-	            checkParentRels.forEach(function(entity) {   // include parent relations
-	                if (entity.type !== 'relation') {        // but not super-relations
-	                    graph.parentRelations(entity).forEach(function(parentRelation) {
-	                        acc.add(parentRelation.id);
-	                    });
-	                }
-	            });
+	function uiNoteEditor(context) {
+	  var dispatch$1 = dispatch('change');
+	  var noteComments = uiNoteComments();
+	  var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);
 
-	            return acc;
+	  var _note;
 
-	        }, new Set());
-	    }
+	  var _newNote; // var _fieldsArr;
 
-	    //
-	    // Run validation for several entities, supplied `entityIDs`,
-	    // against `graph` for the given `cache`
-	    //
-	    function validateEntities(entityIDs, graph, cache) {
 
-	        // clear caches for existing issues related to these entities
-	        entityIDs.forEach(cache.uncacheEntityID);
+	  function noteEditor(selection) {
+	    var header = selection.selectAll('.header').data([0]);
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').on('click', function () {
+	      context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h3').html(_t.html('note.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.note-editor').data([0]);
+	    editor.enter().append('div').attr('class', 'modal-section note-editor').merge(editor).call(noteHeader.note(_note)).call(noteComments.note(_note)).call(noteSaveSection);
+	    var footer = selection.selectAll('.footer').data([0]);
+	    footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOSM(context).what(_note)).call(uiNoteReport().note(_note)); // rerender the note editor on any auth change
+
+	    var osm = services.osm;
+
+	    if (osm) {
+	      osm.on('change.note-save', function () {
+	        selection.call(noteEditor);
+	      });
+	    }
+	  }
 
-	        // detect new issues and update caches
-	        entityIDs.forEach(function(entityID) {
-	            var entity = graph.hasEntity(entityID);
-	            // don't validate deleted entities
-	            if (!entity) { return; }
+	  function noteSaveSection(selection) {
+	    var isSelected = _note && _note.id === context.selectedNoteID();
 
-	            var issues = validateEntity(entity, graph);
-	            cache.cacheIssues(issues);
-	        });
-	    }
+	    var noteSave = selection.selectAll('.note-save').data(isSelected ? [_note] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
+	    noteSave.exit().remove(); // enter
 
-	    //
-	    // Validates anything that has changed since the last time it was run.
-	    // Also updates the "validatedGraph" to be the current graph
-	    // and dispatches a `validated` event when finished.
-	    //
-	    validator.validate = function() {
+	    var noteSaveEnter = noteSave.enter().append('div').attr('class', 'note-save save-section cf'); // // if new note, show categories to pick from
+	    // if (_note.isNew()) {
+	    //     var presets = presetManager;
+	    //     // NOTE: this key isn't a age and therefore there is no documentation (yet)
+	    //     _fieldsArr = [
+	    //         uiField(context, presets.field('category'), null, { show: true, revert: false }),
+	    //     ];
+	    //     _fieldsArr.forEach(function(field) {
+	    //         field
+	    //             .on('change', changeCategory);
+	    //     });
+	    //     noteSaveEnter
+	    //         .append('div')
+	    //         .attr('class', 'note-category')
+	    //         .call(formFields.fieldsArr(_fieldsArr));
+	    // }
+	    // function changeCategory() {
+	    //     // NOTE: perhaps there is a better way to get value
+	    //     var val = context.container().select('input[name=\'category\']:checked').property('__data__') || undefined;
+	    //     // store the unsaved category with the note itself
+	    //     _note = _note.update({ newCategory: val });
+	    //     var osm = services.osm;
+	    //     if (osm) {
+	    //         osm.replaceNote(_note);  // update note cache
+	    //     }
+	    //     noteSave
+	    //         .call(noteSaveButtons);
+	    // }
 
-	        var currGraph = context.graph();
-	        _validatedGraph = _validatedGraph || context.history().base();
-	        if (currGraph === _validatedGraph) {
-	            dispatch$1.call('validated');
-	            return;
-	        }
-	        var oldGraph = _validatedGraph;
-	        var difference = coreDifference(oldGraph, currGraph);
-	        _validatedGraph = currGraph;
+	    noteSaveEnter.append('h4').attr('class', '.note-save-header').html(function () {
+	      return _note.isNew() ? _t('note.newDescription') : _t('note.newComment');
+	    });
+	    var commentTextarea = noteSaveEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('note.inputPlaceholder')).attr('maxlength', 1000).property('value', function (d) {
+	      return d.newComment;
+	    }).call(utilNoAuto).on('keydown.note-input', keydown).on('input.note-input', changeInput).on('blur.note-input', changeInput);
 
-	        var createdAndModifiedEntityIDs = difference.extantIDs(true);   // created/modified (true = w/relation members)
-	        var entityIDsToCheck = entityIDsToValidate(createdAndModifiedEntityIDs, currGraph);
+	    if (!commentTextarea.empty() && _newNote) {
+	      // autofocus the comment field for new notes
+	      commentTextarea.node().focus();
+	    } // update
 
-	        // check modified and deleted entities against the old graph in order to update their related entities
-	        // (e.g. deleting the only highway connected to a road should create a disconnected highway issue)
-	        var modifiedAndDeletedEntityIDs = difference.deleted().concat(difference.modified())
-	            .map(function(entity) { return entity.id; });
-	        var entityIDsToCheckForOldGraph = entityIDsToValidate(modifiedAndDeletedEntityIDs, oldGraph);
 
-	        // concat the sets
-	        entityIDsToCheckForOldGraph.forEach(entityIDsToCheck.add, entityIDsToCheck);
+	    noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter
 
-	        validateEntities(entityIDsToCheck, context.graph(), _headCache);
+	    function keydown(d3_event) {
+	      if (!(d3_event.keyCode === 13 && // ↩ Return
+	      d3_event.metaKey)) return;
+	      var osm = services.osm;
+	      if (!osm) return;
+	      var hasAuth = osm.authenticated();
+	      if (!hasAuth) return;
+	      if (!_note.newComment) return;
+	      d3_event.preventDefault();
+	      select(this).on('keydown.note-input', null); // focus on button and submit
+
+	      window.setTimeout(function () {
+	        if (_note.isNew()) {
+	          noteSave.selectAll('.save-button').node().focus();
+	          clickSave();
+	        } else {
+	          noteSave.selectAll('.comment-button').node().focus();
+	          clickComment();
+	        }
+	      }, 10);
+	    }
 
-	        dispatch$1.call('validated');
-	    };
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim() || undefined; // store the unsaved comment with the note itself
 
+	      _note = _note.update({
+	        newComment: val
+	      });
+	      var osm = services.osm;
 
-	    // WHEN TO RUN VALIDATION:
-	    // When graph changes:
-	    context.history()
-	        .on('restore.validator', validator.validate)   // restore saved history
-	        .on('undone.validator', validator.validate)    // undo
-	        .on('redone.validator', validator.validate);   // redo
-	        // but not on 'change' (e.g. while drawing)
+	      if (osm) {
+	        osm.replaceNote(_note); // update note cache
+	      }
 
-	    // When user chages editing modes:
-	    context
-	        .on('exit.validator', validator.validate);
+	      noteSave.call(noteSaveButtons);
+	    }
+	  }
 
-	    // When merging fetched data:
-	    context.history()
-	        .on('merge.validator', function(entities) {
-	            if (!entities) { return; }
-	            var handle = window.requestIdleCallback(function() {
-	                var entityIDs = entities.map(function(entity) { return entity.id; });
-	                var headGraph = context.graph();
-	                validateEntities(entityIDsToValidate(entityIDs, headGraph), headGraph, _headCache);
+	  function userDetails(selection) {
+	    var detailSection = selection.selectAll('.detail-section').data([0]);
+	    detailSection = detailSection.enter().append('div').attr('class', 'detail-section').merge(detailSection);
+	    var osm = services.osm;
+	    if (!osm) return; // Add warning if user is not logged in
 
-	                var baseGraph = context.history().base();
-	                validateEntities(entityIDsToValidate(entityIDs, baseGraph), baseGraph, _baseCache);
+	    var hasAuth = osm.authenticated();
+	    var authWarning = detailSection.selectAll('.auth-warning').data(hasAuth ? [] : [0]);
+	    authWarning.exit().transition().duration(200).style('opacity', 0).remove();
+	    var authEnter = authWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning auth-warning').style('opacity', 0);
+	    authEnter.call(svgIcon('#iD-icon-alert', 'inline'));
+	    authEnter.append('span').html(_t.html('note.login'));
+	    authEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('login')).on('click.note-login', function (d3_event) {
+	      d3_event.preventDefault();
+	      osm.authenticate();
+	    });
+	    authEnter.transition().duration(200).style('opacity', 1);
+	    var prose = detailSection.selectAll('.note-save-prose').data(hasAuth ? [0] : []);
+	    prose.exit().remove();
+	    prose = prose.enter().append('p').attr('class', 'note-save-prose').html(_t.html('note.upload_explanation')).merge(prose);
+	    osm.userDetails(function (err, user) {
+	      if (err) return;
+	      var userLink = select(document.createElement('div'));
+
+	      if (user.image_url) {
+	        userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+	      }
 
-	                dispatch$1.call('validated');
-	            });
-	            _deferred.add(handle);
-	        });
+	      userLink.append('a').attr('class', 'user-info').html(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
+	      prose.html(_t.html('note.upload_explanation_with_user', {
+	        user: userLink.html()
+	      }));
+	    });
+	  }
 
+	  function noteSaveButtons(selection) {
+	    var osm = services.osm;
+	    var hasAuth = osm && osm.authenticated();
 
-	    return validator;
-	}
+	    var isSelected = _note && _note.id === context.selectedNoteID();
 
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	function validationCache() {
+	    buttonSection.exit().remove(); // enter
 
-	    var cache = {
-	        issuesByIssueID: {},  // issue.id -> issue
-	        issuesByEntityID: {} // entity.id -> set(issue.id)
-	    };
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
 
-	    cache.cacheIssues = function(issues) {
-	        issues.forEach(function(issue) {
-	            var entityIds = issue.entityIds || [];
-	            entityIds.forEach(function(entityId) {
-	                if (!cache.issuesByEntityID[entityId]) {
-	                    cache.issuesByEntityID[entityId] = new Set();
-	                }
-	                cache.issuesByEntityID[entityId].add(issue.id);
-	            });
-	            cache.issuesByIssueID[issue.id] = issue;
-	        });
-	    };
+	    if (_note.isNew()) {
+	      buttonEnter.append('button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
+	      buttonEnter.append('button').attr('class', 'button save-button action').html(_t.html('note.save'));
+	    } else {
+	      buttonEnter.append('button').attr('class', 'button status-button action');
+	      buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('note.comment'));
+	    } // update
 
-	    cache.uncacheIssue = function(issue) {
-	        // When multiple entities are involved (e.g. crossing_ways),
-	        // remove this issue from the other entity caches too..
-	        var entityIds = issue.entityIds || [];
-	        entityIds.forEach(function(entityId) {
-	            if (cache.issuesByEntityID[entityId]) {
-	                cache.issuesByEntityID[entityId].delete(issue.id);
-	            }
-	        });
-	        delete cache.issuesByIssueID[issue.id];
-	    };
 
-	    cache.uncacheIssues = function(issues) {
-	        issues.forEach(cache.uncacheIssue);
-	    };
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.cancel-button') // select and propagate data
+	    .on('click.cancel', clickCancel);
+	    buttonSection.select('.save-button') // select and propagate data
+	    .attr('disabled', isSaveDisabled).on('click.save', clickSave);
+	    buttonSection.select('.status-button') // select and propagate data
+	    .attr('disabled', hasAuth ? null : true).html(function (d) {
+	      var action = d.status === 'open' ? 'close' : 'open';
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t('note.' + action + andComment);
+	    }).on('click.status', clickStatus);
+	    buttonSection.select('.comment-button') // select and propagate data
+	    .attr('disabled', isSaveDisabled).on('click.comment', clickComment);
 
-	    cache.uncacheIssuesOfType = function(type) {
-	        var issuesOfType = Object.values(cache.issuesByIssueID)
-	            .filter(function(issue) { return issue.type === type; });
-	        cache.uncacheIssues(issuesOfType);
-	    };
+	    function isSaveDisabled(d) {
+	      return hasAuth && d.status === 'open' && d.newComment ? null : true;
+	    }
+	  }
 
-	    //
-	    // Remove a single entity and all its related issues from the caches
-	    //
-	    cache.uncacheEntityID = function(entityID) {
-	        var issueIDs = cache.issuesByEntityID[entityID];
-	        if (!issueIDs) { return; }
-
-	        issueIDs.forEach(function(issueID) {
-	            var issue = cache.issuesByIssueID[issueID];
-	            if (issue) {
-	                cache.uncacheIssue(issue);
-	            } else {
-	                delete cache.issuesByIssueID[issueID];
-	            }
-	        });
+	  function clickCancel(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	        delete cache.issuesByEntityID[entityID];
-	    };
+	    var osm = services.osm;
 
-	    return cache;
-	}
+	    if (osm) {
+	      osm.removeNote(d);
+	    }
 
-	function coreUploader(context) {
+	    context.enter(modeBrowse(context));
+	    dispatch$1.call('change');
+	  }
 
-	    var dispatch$1 = dispatch(
-	        // Start and end events are dispatched exactly once each per legitimate outside call to `save`
-	        'saveStarted', // dispatched as soon as a call to `save` has been deemed legitimate
-	        'saveEnded',   // dispatched after the result event has been dispatched
+	  function clickSave(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	        'willAttemptUpload', // dispatched before the actual upload call occurs, if it will
-	        'progressChanged',
+	    var osm = services.osm;
 
-	        // Each save results in one of these outcomes:
-	        'resultNoChanges', // upload wasn't attempted since there were no edits
-	        'resultErrors',    // upload failed due to errors
-	        'resultConflicts', // upload failed due to data conflicts
-	        'resultSuccess'    // upload completed without errors
-	    );
+	    if (osm) {
+	      osm.postNoteCreate(d, function (err, note) {
+	        dispatch$1.call('change', note);
+	      });
+	    }
+	  }
 
-	    var _isSaving = false;
+	  function clickStatus(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	    var _conflicts = [];
-	    var _errors = [];
-	    var _origChanges;
+	    var osm = services.osm;
 
-	    var _discardTags = {};
-	    _mainFileFetcher.get('discarded')
-	        .then(function(d) { _discardTags = d; })
-	        .catch(function() { /* ignore */ });
+	    if (osm) {
+	      var setStatus = d.status === 'open' ? 'closed' : 'open';
+	      osm.postNoteUpdate(d, setStatus, function (err, note) {
+	        dispatch$1.call('change', note);
+	      });
+	    }
+	  }
 
-	    var uploader = utilRebind({}, dispatch$1, 'on');
+	  function clickComment(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	    uploader.isSaving = function() {
-	        return _isSaving;
-	    };
+	    var osm = services.osm;
 
-	    uploader.save = function(changeset, tryAgain, checkConflicts) {
-	        // Guard against accidentally entering save code twice - #4641
-	        if (_isSaving && !tryAgain) {
-	            return;
-	        }
+	    if (osm) {
+	      osm.postNoteUpdate(d, d.status, function (err, note) {
+	        dispatch$1.call('change', note);
+	      });
+	    }
+	  }
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	  noteEditor.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteEditor;
+	  };
 
-	        // If user somehow got logged out mid-save, try to reauthenticate..
-	        // This can happen if they were logged in from before, but the tokens are no longer valid.
-	        if (!osm.authenticated()) {
-	            osm.authenticate(function(err) {
-	                if (!err) {
-	                    uploader.save(changeset, tryAgain, checkConflicts);  // continue where we left off..
-	                }
-	            });
-	            return;
-	        }
+	  noteEditor.newNote = function (val) {
+	    if (!arguments.length) return _newNote;
+	    _newNote = val;
+	    return noteEditor;
+	  };
 
-	        if (!_isSaving) {
-	            _isSaving = true;
-	            dispatch$1.call('saveStarted', this);
-	        }
+	  return utilRebind(noteEditor, dispatch$1, 'on');
+	}
 
-	        var history = context.history();
+	function modeSelectNote(context, selectedNoteID) {
+	  var mode = {
+	    id: 'select-note',
+	    button: 'browse'
+	  };
 
-	        _conflicts = [];
-	        _errors = [];
+	  var _keybinding = utilKeybinding('select-note');
 
-	        // Store original changes, in case user wants to download them as an .osc file
-	        _origChanges = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	  var _noteEditor = uiNoteEditor(context).on('change', function () {
+	    context.map().pan([0, 0]); // trigger a redraw
 
-	        // First time, `history.perform` a no-op action.
-	        // Any conflict resolutions will be done as `history.replace`
-	        // Remember to pop this later if needed
-	        if (!tryAgain) {
-	            history.perform(actionNoop());
-	        }
+	    var note = checkSelectedID();
+	    if (!note) return;
+	    context.ui().sidebar.show(_noteEditor.note(note));
+	  });
 
-	        // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
-	        if (!checkConflicts) {
-	            upload(changeset);
+	  var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+	  var _newFeature = false;
 
-	        // Do the full (slow) conflict check..
-	        } else {
-	            performFullConflictCheck(changeset);
-	        }
+	  function checkSelectedID() {
+	    if (!services.osm) return;
+	    var note = services.osm.getNote(selectedNoteID);
 
-	    };
+	    if (!note) {
+	      context.enter(modeBrowse(context));
+	    }
 
+	    return note;
+	  } // class the note as selected, or return to browse mode if the note is gone
 
-	    function performFullConflictCheck(changeset) {
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	  function selectNote(d3_event, drawn) {
+	    if (!checkSelectedID()) return;
+	    var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
 
-	        var history = context.history();
+	    if (selection.empty()) {
+	      // Return to browse mode if selected DOM elements have
+	      // disappeared because the user moved them out of view..
+	      var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
 
-	        var localGraph = context.graph();
-	        var remoteGraph = coreGraph(history.base(), true);
+	      if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	        context.enter(modeBrowse(context));
+	      }
+	    } else {
+	      selection.classed('selected', true);
+	      context.selectedNoteID(selectedNoteID);
+	    }
+	  }
 
-	        var summary = history.difference().summary();
-	        var _toCheck = [];
-	        for (var i = 0; i < summary.length; i++) {
-	            var item = summary[i];
-	            if (item.changeType === 'modified') {
-	                _toCheck.push(item.entity.id);
-	            }
-	        }
+	  function esc() {
+	    if (context.container().select('.combobox').size()) return;
+	    context.enter(modeBrowse(context));
+	  }
 
-	        var _toLoad = withChildNodes(_toCheck, localGraph);
-	        var _loaded = {};
-	        var _toLoadCount = 0;
-	        var _toLoadTotal = _toLoad.length;
+	  mode.zoomToSelected = function () {
+	    if (!services.osm) return;
+	    var note = services.osm.getNote(selectedNoteID);
 
-	        if (_toCheck.length) {
-	            dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
-	            _toLoad.forEach(function(id) { _loaded[id] = false; });
-	            osm.loadMultiple(_toLoad, loaded);
-	        } else {
-	            upload(changeset);
-	        }
+	    if (note) {
+	      context.map().centerZoomEase(note.loc, 20);
+	    }
+	  };
 
-	        return;
+	  mode.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return mode;
+	  };
 
-	        function withChildNodes(ids, graph) {
-	            var s = new Set(ids);
-	            ids.forEach(function(id) {
-	                var entity = graph.entity(id);
-	                if (entity.type !== 'way') { return; }
+	  mode.enter = function () {
+	    var note = checkSelectedID();
+	    if (!note) return;
 
-	                graph.childNodes(entity).forEach(function(child) {
-	                    if (child.version !== undefined) {
-	                        s.add(child.id);
-	                    }
-	                });
-	            });
+	    _behaviors.forEach(context.install);
 
-	            return Array.from(s);
-	        }
+	    _keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
 
+	    select(document).call(_keybinding);
+	    selectNote();
+	    var sidebar = context.ui().sidebar;
+	    sidebar.show(_noteEditor.note(note).newNote(_newFeature)); // expand the sidebar, avoid obscuring the note if needed
 
-	        // Reload modified entities into an alternate graph and check for conflicts..
-	        function loaded(err, result) {
-	            if (_errors.length) { return; }
+	    sidebar.expand(sidebar.intersects(note.extent()));
+	    context.map().on('drawn.select', selectNote);
+	  };
 
-	            if (err) {
-	                _errors.push({
-	                    msg: err.message || err.responseText,
-	                    details: [ _t('save.status_code', { code: err.status }) ]
-	                });
-	                didResultInErrors();
+	  mode.exit = function () {
+	    _behaviors.forEach(context.uninstall);
 
-	            } else {
-	                var loadMore = [];
-
-	                result.data.forEach(function(entity) {
-	                    remoteGraph.replace(entity);
-	                    _loaded[entity.id] = true;
-	                    _toLoad = _toLoad.filter(function(val) { return val !== entity.id; });
-
-	                    if (!entity.visible) { return; }
-
-	                    // Because loadMultiple doesn't download /full like loadEntity,
-	                    // need to also load children that aren't already being checked..
-	                    var i, id;
-	                    if (entity.type === 'way') {
-	                        for (i = 0; i < entity.nodes.length; i++) {
-	                            id = entity.nodes[i];
-	                            if (_loaded[id] === undefined) {
-	                                _loaded[id] = false;
-	                                loadMore.push(id);
-	                            }
-	                        }
-	                    } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-	                        for (i = 0; i < entity.members.length; i++) {
-	                            id = entity.members[i].id;
-	                            if (_loaded[id] === undefined) {
-	                                _loaded[id] = false;
-	                                loadMore.push(id);
-	                            }
-	                        }
-	                    }
-	                });
+	    select(document).call(_keybinding.unbind);
+	    context.surface().selectAll('.layer-notes .selected').classed('selected hover', false);
+	    context.map().on('drawn.select', null);
+	    context.ui().sidebar.hide();
+	    context.selectedNoteID(null);
+	  };
 
-	                _toLoadCount += result.data.length;
-	                _toLoadTotal += loadMore.length;
-	                dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+	  return mode;
+	}
 
-	                if (loadMore.length) {
-	                    _toLoad.push.apply(_toLoad, loadMore);
-	                    osm.loadMultiple(loadMore, loaded);
-	                }
+	function modeDragNote(context) {
+	  var mode = {
+	    id: 'drag-note',
+	    button: 'browse'
+	  };
+	  var edit = behaviorEdit(context);
 
-	                if (!_toLoad.length) {
-	                    detectConflicts();
-	                    upload(changeset);
-	                }
-	            }
-	        }
+	  var _nudgeInterval;
 
+	  var _lastLoc;
 
-	        function detectConflicts() {
-	            function choice(id, text, action) {
-	                return {
-	                    id: id,
-	                    text: text,
-	                    action: function() {
-	                        history.replace(action);
-	                    }
-	                };
-	            }
-	            function formatUser(d) {
-	                return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
-	            }
-	            function entityName(entity) {
-	                return utilDisplayName(entity) || (utilDisplayType(entity.id) + ' ' + entity.id);
-	            }
+	  var _note; // most current note.. dragged note may have stale datum.
 
-	            function sameVersions(local, remote) {
-	                if (local.version !== remote.version) { return false; }
 
-	                if (local.type === 'way') {
-	                    var children = utilArrayUnion(local.nodes, remote.nodes);
-	                    for (var i = 0; i < children.length; i++) {
-	                        var a = localGraph.hasEntity(children[i]);
-	                        var b = remoteGraph.hasEntity(children[i]);
-	                        if (a && b && a.version !== b.version) { return false; }
-	                    }
-	                }
+	  function startNudge(d3_event, nudge) {
+	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+	    _nudgeInterval = window.setInterval(function () {
+	      context.map().pan(nudge);
+	      doMove(d3_event, nudge);
+	    }, 50);
+	  }
 
-	                return true;
-	            }
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
+	    }
+	  }
+
+	  function origin(note) {
+	    return context.projection(note.loc);
+	  }
 
-	            _toCheck.forEach(function(id) {
-	                var local = localGraph.entity(id);
-	                var remote = remoteGraph.entity(id);
+	  function start(d3_event, note) {
+	    _note = note;
+	    var osm = services.osm;
 
-	                if (sameVersions(local, remote)) { return; }
+	    if (osm) {
+	      // Get latest note from cache.. The marker may have a stale datum bound to it
+	      // and dragging it around can sometimes delete the users note comment.
+	      _note = osm.getNote(_note.id);
+	    }
 
-	                var merge = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags, formatUser);
+	    context.surface().selectAll('.note-' + _note.id).classed('active', true);
+	    context.perform(actionNoop());
+	    context.enter(mode);
+	    context.selectedNoteID(_note.id);
+	  }
 
-	                history.replace(merge);
+	  function move(d3_event, entity, point) {
+	    d3_event.stopPropagation();
+	    _lastLoc = context.projection.invert(point);
+	    doMove(d3_event);
+	    var nudge = geoViewportEdge(point, context.map().dimensions());
 
-	                var mergeConflicts = merge.conflicts();
-	                if (!mergeConflicts.length) { return; }  // merged safely
+	    if (nudge) {
+	      startNudge(d3_event, nudge);
+	    } else {
+	      stopNudge();
+	    }
+	  }
 
-	                var forceLocal = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_local');
-	                var forceRemote = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_remote');
-	                var keepMine = _t('save.conflict.' + (remote.visible ? 'keep_local' : 'restore'));
-	                var keepTheirs = _t('save.conflict.' + (remote.visible ? 'keep_remote' : 'delete'));
+	  function doMove(d3_event, nudge) {
+	    nudge = nudge || [0, 0];
+	    var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
+	    var currMouse = geoVecSubtract(currPoint, nudge);
+	    var loc = context.projection.invert(currMouse);
+	    _note = _note.move(loc);
+	    var osm = services.osm;
 
-	                _conflicts.push({
-	                    id: id,
-	                    name: entityName(local),
-	                    details: mergeConflicts,
-	                    chosen: 1,
-	                    choices: [
-	                        choice(id, keepMine, forceLocal),
-	                        choice(id, keepTheirs, forceRemote)
-	                    ]
-	                });
-	            });
-	        }
+	    if (osm) {
+	      osm.replaceNote(_note); // update note cache
 	    }
 
+	    context.replace(actionNoop()); // trigger redraw
+	  }
 
-	    function upload(changeset) {
-	        var osm = context.connection();
-	        if (!osm) {
-	            _errors.push({ msg: 'No OSM Service' });
-	        }
-
-	        if (_conflicts.length) {
-	            didResultInConflicts(changeset);
+	  function end() {
+	    context.replace(actionNoop()); // trigger redraw
 
-	        } else if (_errors.length) {
-	            didResultInErrors();
+	    context.selectedNoteID(_note.id).enter(modeSelectNote(context, _note.id));
+	  }
 
-	        } else {
-	            var history = context.history();
-	            var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
-	            if (changes.modified.length || changes.created.length || changes.deleted.length) {
+	  var drag = behaviorDrag().selector('.layer-touch.markers .target.note.new').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);
 
-	                dispatch$1.call('willAttemptUpload', this);
+	  mode.enter = function () {
+	    context.install(edit);
+	  };
 
-	                osm.putChangeset(changeset, changes, uploadCallback);
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
+	    context.uninstall(edit);
+	    context.surface().selectAll('.active').classed('active', false);
+	    stopNudge();
+	  };
 
-	            } else {
-	                // changes were insignificant or reverted by user
-	                didResultInNoChanges();
-	            }
-	        }
-	    }
+	  mode.behavior = drag;
+	  return mode;
+	}
 
+	function uiDataHeader() {
+	  var _datum;
 
-	    function uploadCallback(err, changeset) {
-	        if (err) {
-	            if (err.status === 409) {  // 409 Conflict
-	                uploader.save(changeset, true, true);  // tryAgain = true, checkConflicts = true
-	            } else {
-	                _errors.push({
-	                    msg: err.message || err.responseText,
-	                    details: [ _t('save.status_code', { code: err.status }) ]
-	                });
-	                didResultInErrors();
-	            }
+	  function dataHeader(selection) {
+	    var header = selection.selectAll('.data-header').data(_datum ? [_datum] : [], function (d) {
+	      return d.__featurehash__;
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'data-header');
+	    var iconEnter = headerEnter.append('div').attr('class', 'data-header-icon');
+	    iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-data', 'note-fill'));
+	    headerEnter.append('div').attr('class', 'data-header-label').html(_t.html('map_data.layers.custom.title'));
+	  }
 
-	        } else {
-	            didResultInSuccess(changeset);
-	        }
-	    }
+	  dataHeader.datum = function (val) {
+	    if (!arguments.length) return _datum;
+	    _datum = val;
+	    return this;
+	  };
 
-	    function didResultInNoChanges() {
+	  return dataHeader;
+	}
 
-	        dispatch$1.call('resultNoChanges', this);
+	// It is keyed on the `value` of the entry. Data should be an array of objects like:
+	//   [{
+	//       value:   'string value',  // required
+	//       display: 'label html'     // optional
+	//       title:   'hover text'     // optional
+	//       terms:   ['search terms'] // optional
+	//   }, ...]
 
-	        endSave();
+	var _comboHideTimerID;
 
-	        context.flush(); // reset iD
-	    }
+	function uiCombobox(context, klass) {
+	  var dispatch$1 = dispatch('accept', 'cancel');
+	  var container = context.container();
+	  var _suggestions = [];
+	  var _data = [];
+	  var _fetched = {};
+	  var _selected = null;
+	  var _canAutocomplete = true;
+	  var _caseSensitive = false;
+	  var _cancelFetch = false;
+	  var _minItems = 2;
+	  var _tDown = 0;
+
+	  var _mouseEnterHandler, _mouseLeaveHandler;
+
+	  var _fetcher = function _fetcher(val, cb) {
+	    cb(_data.filter(function (d) {
+	      var terms = d.terms || [];
+	      terms.push(d.value);
+	      return terms.some(function (term) {
+	        return term.toString().toLowerCase().indexOf(val.toLowerCase()) !== -1;
+	      });
+	    }));
+	  };
 
-	    function didResultInErrors() {
+	  var combobox = function combobox(input, attachTo) {
+	    if (!input || input.empty()) return;
+	    input.classed('combobox-input', true).on('focus.combo-input', focus).on('blur.combo-input', blur).on('keydown.combo-input', keydown).on('keyup.combo-input', keyup).on('input.combo-input', change).on('mousedown.combo-input', mousedown).each(function () {
+	      var parent = this.parentNode;
+	      var sibling = this.nextSibling;
+	      select(parent).selectAll('.combobox-caret').filter(function (d) {
+	        return d === input.node();
+	      }).data([input.node()]).enter().insert('div', function () {
+	        return sibling;
+	      }).attr('class', 'combobox-caret').on('mousedown.combo-caret', function (d3_event) {
+	        d3_event.preventDefault(); // don't steal focus from input
 
-	        context.history().pop();
+	        input.node().focus(); // focus the input as if it was clicked
 
-	        dispatch$1.call('resultErrors', this, _errors);
+	        mousedown(d3_event);
+	      }).on('mouseup.combo-caret', function (d3_event) {
+	        d3_event.preventDefault(); // don't steal focus from input
 
-	        endSave();
-	    }
+	        mouseup(d3_event);
+	      });
+	    });
 
+	    function mousedown(d3_event) {
+	      if (d3_event.button !== 0) return; // left click only
 
-	    function didResultInConflicts(changeset) {
+	      _tDown = +new Date(); // clear selection
 
-	        _conflicts.sort(function(a, b) { return b.id.localeCompare(a.id); });
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
 
-	        dispatch$1.call('resultConflicts', this, changeset, _conflicts, _origChanges);
+	      if (start !== end) {
+	        var val = utilGetSetValue(input);
+	        input.node().setSelectionRange(val.length, val.length);
+	        return;
+	      }
 
-	        endSave();
+	      input.on('mouseup.combo-input', mouseup);
 	    }
 
+	    function mouseup(d3_event) {
+	      input.on('mouseup.combo-input', null);
+	      if (d3_event.button !== 0) return; // left click only
 
-	    function didResultInSuccess(changeset) {
+	      if (input.node() !== document.activeElement) return; // exit if this input is not focused
 
-	        // delete the edit stack cached to local storage
-	        context.history().clearSaved();
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
+	      if (start !== end) return; // exit if user is selecting
+	      // not showing or showing for a different field - try to show it.
 
-	        dispatch$1.call('resultSuccess', this, changeset);
+	      var combo = container.selectAll('.combobox');
 
-	        // Add delay to allow for postgres replication #1646 #2678
-	        window.setTimeout(function() {
+	      if (combo.empty() || combo.datum() !== input.node()) {
+	        var tOrig = _tDown;
+	        window.setTimeout(function () {
+	          if (tOrig !== _tDown) return; // exit if user double clicked
 
-	            endSave();
+	          fetchComboData('', function () {
+	            show();
+	            render();
+	          });
+	        }, 250);
+	      } else {
+	        hide();
+	      }
+	    }
 
-	            context.flush(); // reset iD
-	        }, 2500);
+	    function focus() {
+	      fetchComboData(''); // prefetch values (may warm taginfo cache)
 	    }
 
+	    function blur() {
+	      _comboHideTimerID = window.setTimeout(hide, 75);
+	    }
 
-	    function endSave() {
-	        _isSaving = false;
+	    function show() {
+	      hide(); // remove any existing
 
-	        dispatch$1.call('saveEnded', this);
+	      container.insert('div', ':first-child').datum(input.node()).attr('class', 'combobox' + (klass ? ' combobox-' + klass : '')).style('position', 'absolute').style('display', 'block').style('left', '0px').on('mousedown.combo-container', function (d3_event) {
+	        // prevent moving focus out of the input field
+	        d3_event.preventDefault();
+	      });
+	      container.on('scroll.combo-scroll', render, true);
 	    }
 
+	    function hide() {
+	      if (_comboHideTimerID) {
+	        window.clearTimeout(_comboHideTimerID);
+	        _comboHideTimerID = undefined;
+	      }
 
-	    uploader.cancelConflictResolution = function() {
-	        context.history().pop();
-	    };
+	      container.selectAll('.combobox').remove();
+	      container.on('scroll.combo-scroll', null);
+	    }
 
+	    function keydown(d3_event) {
+	      var shown = !container.selectAll('.combobox').empty();
+	      var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
 
-	    uploader.processResolvedConflicts = function(changeset) {
-	        var history = context.history();
+	      switch (d3_event.keyCode) {
+	        case 8: // ⌫ Backspace
 
-	        for (var i = 0; i < _conflicts.length; i++) {
-	            if (_conflicts[i].chosen === 1) {  // user chose "use theirs"
-	                var entity = context.hasEntity(_conflicts[i].id);
-	                if (entity && entity.type === 'way') {
-	                    var children = utilArrayUniq(entity.nodes);
-	                    for (var j = 0; j < children.length; j++) {
-	                        history.replace(actionRevert(children[j]));
-	                    }
-	                }
-	                history.replace(actionRevert(_conflicts[i].id));
-	            }
-	        }
+	        case 46:
+	          // ⌦ Delete
+	          d3_event.stopPropagation();
+	          _selected = null;
+	          render();
+	          input.on('input.combo-input', function () {
+	            var start = input.property('selectionStart');
+	            input.node().setSelectionRange(start, start);
+	            input.on('input.combo-input', change);
+	          });
+	          break;
 
-	        uploader.save(changeset, true, false);  // tryAgain = true, checkConflicts = false
-	    };
+	        case 9:
+	          // ⇥ Tab
+	          accept();
+	          break;
 
+	        case 13:
+	          // ↩ Return
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation();
+	          break;
 
-	    uploader.reset = function() {
+	        case 38:
+	          // ↑ Up arrow
+	          if (tagName === 'textarea' && !shown) return;
+	          d3_event.preventDefault();
 
-	    };
+	          if (tagName === 'input' && !shown) {
+	            show();
+	          }
 
+	          nav(-1);
+	          break;
 
-	    return uploader;
-	}
+	        case 40:
+	          // ↓ Down arrow
+	          if (tagName === 'textarea' && !shown) return;
+	          d3_event.preventDefault();
 
-	var isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
+	          if (tagName === 'input' && !shown) {
+	            show();
+	          }
 
-	// listen for DPI change, e.g. when dragging a browser window from a retina to non-retina screen
-	window.matchMedia("\n        (-webkit-min-device-pixel-ratio: 2), /* Safari */\n        (min-resolution: 2dppx),             /* standard */\n        (min-resolution: 192dpi)             /* fallback */\n    ").addListener(function() {
+	          nav(+1);
+	          break;
+	      }
+	    }
 
-	    isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
-	});
+	    function keyup(d3_event) {
+	      switch (d3_event.keyCode) {
+	        case 27:
+	          // ⎋ Escape
+	          cancel();
+	          break;
 
+	        case 13:
+	          // ↩ Return
+	          accept();
+	          break;
+	      }
+	    } // Called whenever the input value is changed (e.g. on typing)
 
-	function localeDateString(s) {
-	    if (!s) { return null; }
-	    var options = { day: 'numeric', month: 'short', year: 'numeric' };
-	    var d = new Date(s);
-	    if (isNaN(d.getTime())) { return null; }
-	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-	}
 
-	function vintageRange(vintage) {
-	    var s;
-	    if (vintage.start || vintage.end) {
-	        s = (vintage.start || '?');
-	        if (vintage.start !== vintage.end) {
-	            s += ' - ' + (vintage.end || '?');
+	    function change() {
+	      fetchComboData(value(), function () {
+	        _selected = null;
+	        var val = input.property('value');
+
+	        if (_suggestions.length) {
+	          if (input.property('selectionEnd') === val.length) {
+	            _selected = tryAutocomplete();
+	          }
+
+	          if (!_selected) {
+	            _selected = val;
+	          }
 	        }
-	    }
-	    return s;
-	}
 
+	        if (val.length) {
+	          var combo = container.selectAll('.combobox');
 
-	function rendererBackgroundSource(data) {
-	    var source = Object.assign({}, data);   // shallow copy
-	    var _offset = [0, 0];
-	    var _name = source.name;
-	    var _description = source.description;
-	    var _best = !!source.best;
-	    var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
-
-	    source.tileSize = data.tileSize || 256;
-	    source.zoomExtent = data.zoomExtent || [0, 22];
-	    source.overzoom = data.overzoom !== false;
-
-	    source.offset = function(val) {
-	        if (!arguments.length) { return _offset; }
-	        _offset = val;
-	        return source;
-	    };
+	          if (combo.empty()) {
+	            show();
+	          }
+	        } else {
+	          hide();
+	        }
 
+	        render();
+	      });
+	    } // Called when the user presses up/down arrows to navigate the list
 
-	    source.nudge = function(val, zoomlevel) {
-	        _offset[0] += val[0] / Math.pow(2, zoomlevel);
-	        _offset[1] += val[1] / Math.pow(2, zoomlevel);
-	        return source;
-	    };
 
+	    function nav(dir) {
+	      if (_suggestions.length) {
+	        // try to determine previously selected index..
+	        var index = -1;
 
-	    source.name = function() {
-	        var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-	        return _t('imagery.' + id_safe + '.name', { default: _name });
-	    };
+	        for (var i = 0; i < _suggestions.length; i++) {
+	          if (_selected && _suggestions[i].value === _selected) {
+	            index = i;
+	            break;
+	          }
+	        } // pick new _selected
 
 
-	    source.description = function() {
-	        var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-	        return _t('imagery.' + id_safe + '.description', { default: _description });
-	    };
+	        index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
+	        _selected = _suggestions[index].value;
+	        input.property('value', _selected);
+	      }
 
+	      render();
+	      ensureVisible();
+	    }
 
-	    source.best = function() {
-	        return _best;
-	    };
+	    function ensureVisible() {
+	      var combo = container.selectAll('.combobox');
+	      if (combo.empty()) return;
+	      var containerRect = container.node().getBoundingClientRect();
+	      var comboRect = combo.node().getBoundingClientRect();
 
+	      if (comboRect.bottom > containerRect.bottom) {
+	        var node = attachTo ? attachTo.node() : input.node();
+	        node.scrollIntoView({
+	          behavior: 'instant',
+	          block: 'center'
+	        });
+	        render();
+	      } // https://stackoverflow.com/questions/11039885/scrollintoview-causing-the-whole-page-to-move
 
-	    source.area = function() {
-	        if (!data.polygon) { return Number.MAX_VALUE; }  // worldwide
-	        var area = d3_geoArea({ type: 'MultiPolygon', coordinates: [ data.polygon ] });
-	        return isNaN(area) ? 0 : area;
-	    };
 
+	      var selected = combo.selectAll('.combobox-option.selected').node();
 
-	    source.imageryUsed = function() {
-	        return name || source.id;
-	    };
+	      if (selected) {
+	        selected.scrollIntoView({
+	          behavior: 'smooth',
+	          block: 'nearest'
+	        });
+	      }
+	    }
 
+	    function value() {
+	      var value = input.property('value');
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
 
-	    source.template = function(val) {
-	        if (!arguments.length) { return _template; }
-	        if (source.id === 'custom') {
-	            _template = val;
-	        }
-	        return source;
-	    };
+	      if (start && end) {
+	        value = value.substring(0, start);
+	      }
 
+	      return value;
+	    }
 
-	    source.url = function(coord) {
-	        var result = _template;
-	        if (result === '') { return result; }   // source 'none'
+	    function fetchComboData(v, cb) {
+	      _cancelFetch = false;
 
+	      _fetcher.call(input, v, function (results) {
+	        // already chose a value, don't overwrite or autocomplete it
+	        if (_cancelFetch) return;
+	        _suggestions = results;
+	        results.forEach(function (d) {
+	          _fetched[d.value] = d;
+	        });
 
-	        // Guess a type based on the tokens present in the template
-	        // (This is for 'custom' source, where we don't know)
-	        if (!source.type) {
-	            if (/\{(proj|wkid|bbox)\}/.test(_template)) {
-	                source.type = 'wms';
-	                source.projection = 'EPSG:3857';  // guess
-	            } else if (/\{(x|y)\}/.test(_template)) {
-	                source.type = 'tms';
-	            } else if (/\{u\}/.test(_template)) {
-	                source.type = 'bing';
-	            }
+	        if (cb) {
+	          cb();
 	        }
+	      });
+	    }
 
+	    function tryAutocomplete() {
+	      if (!_canAutocomplete) return;
+	      var val = _caseSensitive ? value() : value().toLowerCase();
+	      if (!val) return; // Don't autocomplete if user is typing a number - #4935
 
-	        if (source.type === 'wms') {
-	            var tileToProjectedCoords = (function(x, y, z) {
-	                //polyfill for IE11, PhantomJS
-	                var sinh = Math.sinh || function(x) {
-	                    var y = Math.exp(x);
-	                    return (y - 1 / y) / 2;
-	                };
-
-	                var zoomSize = Math.pow(2, z);
-	                var lon = x / zoomSize * Math.PI * 2 - Math.PI;
-	                var lat = Math.atan(sinh(Math.PI * (1 - 2 * y / zoomSize)));
-
-	                switch (source.projection) {
-	                    case 'EPSG:4326':
-	                        return {
-	                            x: lon * 180 / Math.PI,
-	                            y: lat * 180 / Math.PI
-	                        };
-	                    default: // EPSG:3857 and synonyms
-	                        var mercCoords = mercatorRaw(lon, lat);
-	                        return {
-	                            x: 20037508.34 / Math.PI * mercCoords[0],
-	                            y: 20037508.34 / Math.PI * mercCoords[1]
-	                        };
-	                }
-	            });
+	      if (!isNaN(parseFloat(val)) && isFinite(val)) return;
+	      var bestIndex = -1;
 
-	            var tileSize = source.tileSize;
-	            var projection = source.projection;
-	            var minXmaxY = tileToProjectedCoords(coord[0], coord[1], coord[2]);
-	            var maxXminY = tileToProjectedCoords(coord[0]+1, coord[1]+1, coord[2]);
-
-	            result = result.replace(/\{(\w+)\}/g, function (token, key) {
-	              switch (key) {
-	                case 'width':
-	                case 'height':
-	                  return tileSize;
-	                case 'proj':
-	                  return projection;
-	                case 'wkid':
-	                  return projection.replace(/^EPSG:/, '');
-	                case 'bbox':
-	                  return minXmaxY.x + ',' + maxXminY.y + ',' + maxXminY.x + ',' + minXmaxY.y;
-	                case 'w':
-	                  return minXmaxY.x;
-	                case 's':
-	                  return maxXminY.y;
-	                case 'n':
-	                  return maxXminY.x;
-	                case 'e':
-	                  return minXmaxY.y;
-	                default:
-	                  return token;
-	              }
-	            });
+	      for (var i = 0; i < _suggestions.length; i++) {
+	        var suggestion = _suggestions[i].value;
+	        var compare = _caseSensitive ? suggestion : suggestion.toLowerCase(); // if search string matches suggestion exactly, pick it..
 
-	        } else if (source.type === 'tms') {
-	            result = result
-	                .replace('{x}', coord[0])
-	                .replace('{y}', coord[1])
-	                // TMS-flipped y coordinate
-	                .replace(/\{[t-]y\}/, Math.pow(2, coord[2]) - coord[1] - 1)
-	                .replace(/\{z(oom)?\}/, coord[2])
-	                // only fetch retina tiles for retina screens
-	                .replace(/\{@2x\}|\{r\}/, isRetina ? '@2x' : '');
-
-	        } else if (source.type === 'bing') {
-	            result = result
-	                .replace('{u}', function() {
-	                    var u = '';
-	                    for (var zoom = coord[2]; zoom > 0; zoom--) {
-	                        var b = 0;
-	                        var mask = 1 << (zoom - 1);
-	                        if ((coord[0] & mask) !== 0) { b++; }
-	                        if ((coord[1] & mask) !== 0) { b += 2; }
-	                        u += b.toString();
-	                    }
-	                    return u;
-	                });
+	        if (compare === val) {
+	          bestIndex = i;
+	          break; // otherwise lock in the first result that starts with the search string..
+	        } else if (bestIndex === -1 && compare.indexOf(val) === 0) {
+	          bestIndex = i;
 	        }
+	      }
 
-	        // these apply to any type..
-	        result = result.replace(/\{switch:([^}]+)\}/, function(s, r) {
-	            var subdomains = r.split(',');
-	            return subdomains[(coord[0] + coord[1]) % subdomains.length];
-	        });
+	      if (bestIndex !== -1) {
+	        var bestVal = _suggestions[bestIndex].value;
+	        input.property('value', bestVal);
+	        input.node().setSelectionRange(val.length, bestVal.length);
+	        return bestVal;
+	      }
+	    }
 
+	    function render() {
+	      if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
+	        hide();
+	        return;
+	      }
 
-	        return result;
-	    };
+	      var shown = !container.selectAll('.combobox').empty();
+	      if (!shown) return;
+	      var combo = container.selectAll('.combobox');
+	      var options = combo.selectAll('.combobox-option').data(_suggestions, function (d) {
+	        return d.value;
+	      });
+	      options.exit().remove(); // enter/update
 
+	      options.enter().append('a').attr('class', 'combobox-option').attr('title', function (d) {
+	        return d.title;
+	      }).html(function (d) {
+	        return d.display || d.value;
+	      }).on('mouseenter', _mouseEnterHandler).on('mouseleave', _mouseLeaveHandler).merge(options).classed('selected', function (d) {
+	        return d.value === _selected;
+	      }).on('click.combo-option', accept).order();
+	      var node = attachTo ? attachTo.node() : input.node();
+	      var containerRect = container.node().getBoundingClientRect();
+	      var rect = node.getBoundingClientRect();
+	      combo.style('left', rect.left + 5 - containerRect.left + 'px').style('width', rect.width - 10 + 'px').style('top', rect.height + rect.top - containerRect.top + 'px');
+	    } // Dispatches an 'accept' event
+	    // Then hides the combobox.
 
-	    source.validZoom = function(z) {
-	        return source.zoomExtent[0] <= z &&
-	            (source.overzoom || source.zoomExtent[1] > z);
-	    };
 
+	    function accept(d3_event, d) {
+	      _cancelFetch = true;
+	      var thiz = input.node();
 
-	    source.isLocatorOverlay = function() {
-	        return source.id === 'mapbox_locator_overlay';
-	    };
+	      if (d) {
+	        // user clicked on a suggestion
+	        utilGetSetValue(input, d.value); // replace field contents
 
+	        utilTriggerEvent(input, 'change');
+	      } // clear (and keep) selection
 
-	    /* hides a source from the list, but leaves it available for use */
-	    source.isHidden = function() {
-	        return source.id === 'DigitalGlobe-Premium-vintage' ||
-	            source.id === 'DigitalGlobe-Standard-vintage';
-	    };
 
+	      var val = utilGetSetValue(input);
+	      thiz.setSelectionRange(val.length, val.length);
+	      d = _fetched[val];
+	      dispatch$1.call('accept', thiz, d, val);
+	      hide();
+	    } // Dispatches an 'cancel' event
+	    // Then hides the combobox.
 
-	    source.copyrightNotices = function() {};
 
+	    function cancel() {
+	      _cancelFetch = true;
+	      var thiz = input.node(); // clear (and remove) selection, and replace field contents
 
-	    source.getMetadata = function(center, tileCoord, callback) {
-	        var vintage = {
-	            start: localeDateString(source.startDate),
-	            end: localeDateString(source.endDate)
-	        };
-	        vintage.range = vintageRange(vintage);
+	      var val = utilGetSetValue(input);
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
+	      val = val.slice(0, start) + val.slice(end);
+	      utilGetSetValue(input, val);
+	      thiz.setSelectionRange(val.length, val.length);
+	      dispatch$1.call('cancel', thiz);
+	      hide();
+	    }
+	  };
 
-	        var metadata = { vintage: vintage };
-	        callback(null, metadata);
-	    };
+	  combobox.canAutocomplete = function (val) {
+	    if (!arguments.length) return _canAutocomplete;
+	    _canAutocomplete = val;
+	    return combobox;
+	  };
 
+	  combobox.caseSensitive = function (val) {
+	    if (!arguments.length) return _caseSensitive;
+	    _caseSensitive = val;
+	    return combobox;
+	  };
 
-	    return source;
-	}
+	  combobox.data = function (val) {
+	    if (!arguments.length) return _data;
+	    _data = val;
+	    return combobox;
+	  };
 
+	  combobox.fetcher = function (val) {
+	    if (!arguments.length) return _fetcher;
+	    _fetcher = val;
+	    return combobox;
+	  };
 
-	rendererBackgroundSource.Bing = function(data, dispatch) {
-	    // http://msdn.microsoft.com/en-us/library/ff701716.aspx
-	    // http://msdn.microsoft.com/en-us/library/ff701701.aspx
+	  combobox.minItems = function (val) {
+	    if (!arguments.length) return _minItems;
+	    _minItems = val;
+	    return combobox;
+	  };
 
-	    data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&mkt=en-gb&n=z';
+	  combobox.itemsMouseEnter = function (val) {
+	    if (!arguments.length) return _mouseEnterHandler;
+	    _mouseEnterHandler = val;
+	    return combobox;
+	  };
 
-	    var bing = rendererBackgroundSource(data);
-	    // var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc
-	    var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q';    // iD
+	  combobox.itemsMouseLeave = function (val) {
+	    if (!arguments.length) return _mouseLeaveHandler;
+	    _mouseLeaveHandler = val;
+	    return combobox;
+	  };
 
+	  return utilRebind(combobox, dispatch$1, 'on');
+	}
 
-	    var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&key=' + key;
-	    var cache = {};
-	    var inflight = {};
-	    var providers = [];
+	uiCombobox.off = function (input, context) {
+	  input.on('focus.combo-input', null).on('blur.combo-input', null).on('keydown.combo-input', null).on('keyup.combo-input', null).on('input.combo-input', null).on('mousedown.combo-input', null).on('mouseup.combo-input', null);
+	  context.container().on('scroll.combo-scroll', null);
+	};
 
-	    d3_json(url)
-	        .then(function(json) {
-	            providers = json.resourceSets[0].resources[0].imageryProviders.map(function(provider) {
-	                return {
-	                    attribution: provider.attribution,
-	                    areas: provider.coverageAreas.map(function(area) {
-	                        return {
-	                            zoom: [area.zoomMin, area.zoomMax],
-	                            extent: geoExtent([area.bbox[1], area.bbox[0]], [area.bbox[3], area.bbox[2]])
-	                        };
-	                    })
-	                };
-	            });
-	            dispatch.call('change');
-	        })
-	        .catch(function() {
-	            /* ignore */
-	        });
+	// hide class, which sets display=none, and a d3 transition for opacity.
+	// this will cause blinking when called repeatedly, so check that the
+	// value actually changes between calls.
 
+	function uiToggle(show, callback) {
+	  return function (selection) {
+	    selection.style('opacity', show ? 0 : 1).classed('hide', false).transition().style('opacity', show ? 1 : 0).on('end', function () {
+	      select(this).classed('hide', !show).style('opacity', null);
+	      if (callback) callback.apply(this);
+	    });
+	  };
+	}
 
-	    bing.copyrightNotices = function(zoom, extent) {
-	        zoom = Math.min(zoom, 21);
-	        return providers.filter(function(provider) {
-	            return provider.areas.some(function(area) {
-	                return extent.intersects(area.extent) &&
-	                    area.zoom[0] <= zoom &&
-	                    area.zoom[1] >= zoom;
-	            });
-	        }).map(function(provider) {
-	            return provider.attribution;
-	        }).join(', ');
-	    };
+	function uiDisclosure(context, key, expandedDefault) {
+	  var dispatch$1 = dispatch('toggled');
 
+	  var _expanded;
 
-	    bing.getMetadata = function(center, tileCoord, callback) {
-	        var tileID = tileCoord.slice(0, 3).join('/');
-	        var zoom = Math.min(tileCoord[2], 21);
-	        var centerPoint = center[1] + ',' + center[0];  // lat,lng
-	        var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint +
-	                '?zl=' + zoom + '&key=' + key;
+	  var _label = utilFunctor('');
 
-	        if (inflight[tileID]) { return; }
+	  var _updatePreference = true;
 
-	        if (!cache[tileID]) {
-	            cache[tileID] = {};
-	        }
-	        if (cache[tileID] && cache[tileID].metadata) {
-	            return callback(null, cache[tileID].metadata);
-	        }
+	  var _content = function _content() {};
 
-	        inflight[tileID] = true;
-	        d3_json(url)
-	            .then(function(result) {
-	                delete inflight[tileID];
-	                if (!result) {
-	                    throw new Error('Unknown Error');
-	                }
-	                var vintage = {
-	                    start: localeDateString(result.resourceSets[0].resources[0].vintageStart),
-	                    end: localeDateString(result.resourceSets[0].resources[0].vintageEnd)
-	                };
-	                vintage.range = vintageRange(vintage);
-
-	                var metadata = { vintage: vintage };
-	                cache[tileID].metadata = metadata;
-	                if (callback) { callback(null, metadata); }
-	            })
-	            .catch(function(err) {
-	                delete inflight[tileID];
-	                if (callback) { callback(err.message); }
-	            });
-	    };
+	  var disclosure = function disclosure(selection) {
+	    if (_expanded === undefined || _expanded === null) {
+	      // loading _expanded here allows it to be reset by calling `disclosure.expanded(null)`
+	      var preference = corePreferences('disclosure.' + key + '.expanded');
+	      _expanded = preference === null ? !!expandedDefault : preference === 'true';
+	    }
 
+	    var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter
 
-	    bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+	    var hideToggleEnter = hideToggle.enter().append('a').attr('href', '#').attr('class', 'hide-toggle hide-toggle-' + key).call(svgIcon('', 'pre-text', 'hide-toggle-icon'));
+	    hideToggleEnter.append('span').attr('class', 'hide-toggle-text'); // update
 
+	    hideToggle = hideToggleEnter.merge(hideToggle);
+	    hideToggle.on('click', toggle).classed('expanded', _expanded);
+	    hideToggle.selectAll('.hide-toggle-text').html(_label());
+	    hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
+	    var wrap = selection.selectAll('.disclosure-wrap').data([0]); // enter/update
 
-	    return bing;
-	};
+	    wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);
+
+	    if (_expanded) {
+	      wrap.call(_content);
+	    }
+
+	    function toggle(d3_event) {
+	      d3_event.preventDefault();
+	      _expanded = !_expanded;
 
+	      if (_updatePreference) {
+	        corePreferences('disclosure.' + key + '.expanded', _expanded);
+	      }
+
+	      hideToggle.classed('expanded', _expanded);
+	      hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
+	      wrap.call(uiToggle(_expanded));
 
+	      if (_expanded) {
+	        wrap.call(_content);
+	      }
 
-	rendererBackgroundSource.Esri = function(data) {
-	    // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
-	    if (data.template.match(/blankTile/) === null) {
-	        data.template = data.template + '?blankTile=false';
+	      dispatch$1.call('toggled', this, _expanded);
 	    }
+	  };
 
-	    var esri = rendererBackgroundSource(data);
-	    var cache = {};
-	    var inflight = {};
-	    var _prevCenter;
+	  disclosure.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = utilFunctor(val);
+	    return disclosure;
+	  };
 
-	    // use a tilemap service to set maximum zoom for esri tiles dynamically
-	    // https://developers.arcgis.com/documentation/tiled-elevation-service/
-	    esri.fetchTilemap = function(center) {
-	        // skip if we have already fetched a tilemap within 5km
-	        if (_prevCenter && geoSphericalDistance(center, _prevCenter) < 5000) { return; }
-	        _prevCenter = center;
+	  disclosure.expanded = function (val) {
+	    if (!arguments.length) return _expanded;
+	    _expanded = val;
+	    return disclosure;
+	  };
 
-	        // tiles are available globally to zoom level 19, afterward they may or may not be present
-	        var z = 20;
+	  disclosure.updatePreference = function (val) {
+	    if (!arguments.length) return _updatePreference;
+	    _updatePreference = val;
+	    return disclosure;
+	  };
 
-	        // first generate a random url using the template
-	        var dummyUrl = esri.url([1,2,3]);
+	  disclosure.content = function (val) {
+	    if (!arguments.length) return _content;
+	    _content = val;
+	    return disclosure;
+	  };
 
-	        // calculate url z/y/x from the lat/long of the center of the map
-	        var x = (Math.floor((center[0] + 180) / 360 * Math.pow(2, z)));
-	        var y = (Math.floor((1 - Math.log(Math.tan(center[1] * Math.PI / 180) + 1 / Math.cos(center[1] * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, z)));
+	  return utilRebind(disclosure, dispatch$1, 'on');
+	}
 
-	        // fetch an 8x8 grid to leverage cache
-	        var tilemapUrl = dummyUrl.replace(/tile\/[0-9]+\/[0-9]+\/[0-9]+\?blankTile=false/, 'tilemap') + '/' + z + '/' + y + '/' + x + '/8/8';
+	// Can be labeled and collapsible.
 
-	        // make the request and introspect the response from the tilemap server
-	        d3_json(tilemapUrl)
-	            .then(function(tilemap) {
-	                if (!tilemap) {
-	                    throw new Error('Unknown Error');
-	                }
-	                var hasTiles = true;
-	                for (var i = 0; i < tilemap.data.length; i++) {
-	                    // 0 means an individual tile in the grid doesn't exist
-	                    if (!tilemap.data[i]) {
-	                        hasTiles = false;
-	                        break;
-	                    }
-	                }
+	function uiSection(id, context) {
+	  var _classes = utilFunctor('');
 
-	                // if any tiles are missing at level 20 we restrict maxZoom to 19
-	                esri.zoomExtent[1] = (hasTiles ? 22 : 19);
-	            })
-	            .catch(function() {
-	                /* ignore */
-	            });
-	    };
+	  var _shouldDisplay;
 
+	  var _content;
 
-	    esri.getMetadata = function(center, tileCoord, callback) {
-	        var tileID = tileCoord.slice(0, 3).join('/');
-	        var zoom = Math.min(tileCoord[2], esri.zoomExtent[1]);
-	        var centerPoint = center[0] + ',' + center[1];  // long, lat (as it should be)
-	        var unknown = _t('info_panels.background.unknown');
-	        var metadataLayer;
-	        var vintage = {};
-	        var metadata = {};
+	  var _disclosure;
 
-	        if (inflight[tileID]) { return; }
+	  var _label;
 
-	        switch (true) {
-	            case (zoom >= 20 && esri.id === 'EsriWorldImageryClarity'):
-	                metadataLayer = 4;
-	                break;
-	            case zoom >= 19:
-	                metadataLayer = 3;
-	                break;
-	            case zoom >= 17:
-	                metadataLayer = 2;
-	                break;
-	            case zoom >= 13:
-	                metadataLayer = 0;
-	                break;
-	            default:
-	                metadataLayer = 99;
-	        }
+	  var _expandedByDefault = utilFunctor(true);
 
-	        var url;
-	        // build up query using the layer appropriate to the current zoom
-	        if (esri.id === 'EsriWorldImagery') {
-	            url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/';
-	        } else if (esri.id === 'EsriWorldImageryClarity') {
-	            url = 'https://serviceslab.arcgisonline.com/arcgis/rest/services/Clarity_World_Imagery/MapServer/';
-	        }
+	  var _disclosureContent;
 
-	        url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
+	  var _disclosureExpanded;
 
-	        if (!cache[tileID]) {
-	            cache[tileID] = {};
-	        }
-	        if (cache[tileID] && cache[tileID].metadata) {
-	            return callback(null, cache[tileID].metadata);
-	        }
+	  var _containerSelection = select(null);
 
-	        // accurate metadata is only available >= 13
-	        if (metadataLayer === 99) {
-	            vintage = {
-	                start: null,
-	                end: null,
-	                range: null
-	            };
-	            metadata = {
-	                vintage: null,
-	                source: unknown,
-	                description: unknown,
-	                resolution: unknown,
-	                accuracy: unknown
-	            };
+	  var section = {
+	    id: id
+	  };
 
-	            callback(null, metadata);
+	  section.classes = function (val) {
+	    if (!arguments.length) return _classes;
+	    _classes = utilFunctor(val);
+	    return section;
+	  };
 
-	        } else {
-	            inflight[tileID] = true;
-	            d3_json(url)
-	                .then(function(result) {
-	                    delete inflight[tileID];
-	                    if (!result) {
-	                        throw new Error('Unknown Error');
-	                    } else if (result.features && result.features.length < 1) {
-	                        throw new Error('No Results');
-	                    } else if (result.error && result.error.message) {
-	                        throw new Error(result.error.message);
-	                    }
+	  section.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = utilFunctor(val);
+	    return section;
+	  };
 
-	                    // pass through the discrete capture date from metadata
-	                    var captureDate = localeDateString(result.features[0].attributes.SRC_DATE2);
-	                    vintage = {
-	                        start: captureDate,
-	                        end: captureDate,
-	                        range: captureDate
-	                    };
-	                    metadata = {
-	                        vintage: vintage,
-	                        source: clean(result.features[0].attributes.NICE_NAME),
-	                        description: clean(result.features[0].attributes.NICE_DESC),
-	                        resolution: clean(+parseFloat(result.features[0].attributes.SRC_RES).toFixed(4)),
-	                        accuracy: clean(+parseFloat(result.features[0].attributes.SRC_ACC).toFixed(4))
-	                    };
-
-	                    // append units - meters
-	                    if (isFinite(metadata.resolution)) {
-	                        metadata.resolution += ' m';
-	                    }
-	                    if (isFinite(metadata.accuracy)) {
-	                        metadata.accuracy += ' m';
-	                    }
+	  section.expandedByDefault = function (val) {
+	    if (!arguments.length) return _expandedByDefault;
+	    _expandedByDefault = utilFunctor(val);
+	    return section;
+	  };
 
-	                    cache[tileID].metadata = metadata;
-	                    if (callback) { callback(null, metadata); }
-	                })
-	                .catch(function(err) {
-	                    delete inflight[tileID];
-	                    if (callback) { callback(err.message); }
-	                });
-	        }
+	  section.shouldDisplay = function (val) {
+	    if (!arguments.length) return _shouldDisplay;
+	    _shouldDisplay = utilFunctor(val);
+	    return section;
+	  };
 
+	  section.content = function (val) {
+	    if (!arguments.length) return _content;
+	    _content = val;
+	    return section;
+	  };
 
-	        function clean(val) {
-	            return String(val).trim() || unknown;
-	        }
-	    };
+	  section.disclosureContent = function (val) {
+	    if (!arguments.length) return _disclosureContent;
+	    _disclosureContent = val;
+	    return section;
+	  };
 
-	    return esri;
-	};
+	  section.disclosureExpanded = function (val) {
+	    if (!arguments.length) return _disclosureExpanded;
+	    _disclosureExpanded = val;
+	    return section;
+	  }; // may be called multiple times
 
 
-	rendererBackgroundSource.None = function() {
-	    var source = rendererBackgroundSource({ id: 'none', template: '' });
+	  section.render = function (selection) {
+	    _containerSelection = selection.selectAll('.section-' + id).data([0]);
 
+	    var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
 
-	    source.name = function() {
-	        return _t('background.none');
-	    };
+	    _containerSelection = sectionEnter.merge(_containerSelection);
 
+	    _containerSelection.call(renderContent);
+	  };
 
-	    source.imageryUsed = function() {
-	        return null;
-	    };
+	  section.reRender = function () {
+	    _containerSelection.call(renderContent);
+	  };
 
+	  section.selection = function () {
+	    return _containerSelection;
+	  };
 
-	    source.area = function() {
-	        return -1;  // sources in background pane are sorted by area
-	    };
+	  section.disclosure = function () {
+	    return _disclosure;
+	  }; // may be called multiple times
 
 
-	    return source;
-	};
+	  function renderContent(selection) {
+	    if (_shouldDisplay) {
+	      var shouldDisplay = _shouldDisplay();
 
+	      selection.classed('hide', !shouldDisplay);
 
-	rendererBackgroundSource.Custom = function(template) {
-	    var source = rendererBackgroundSource({ id: 'custom', template: template });
+	      if (!shouldDisplay) {
+	        selection.html('');
+	        return;
+	      }
+	    }
 
+	    if (_disclosureContent) {
+	      if (!_disclosure) {
+	        _disclosure = uiDisclosure(context, id.replace(/-/g, '_'), _expandedByDefault()).label(_label || '')
+	        /*.on('toggled', function(expanded) {
+	            if (expanded) { selection.node().parentNode.scrollTop += 200; }
+	        })*/
+	        .content(_disclosureContent);
+	      }
 
-	    source.name = function() {
-	        return _t('background.custom');
-	    };
+	      if (_disclosureExpanded !== undefined) {
+	        _disclosure.expanded(_disclosureExpanded);
 
+	        _disclosureExpanded = undefined;
+	      }
 
-	    source.imageryUsed = function() {
-	        // sanitize personal connection tokens - #6801
-	        var cleaned = source.template();
+	      selection.call(_disclosure);
+	      return;
+	    }
 
-	        // from query string parameters
-	        if (cleaned.indexOf('?') !== -1) {
-	            var parts = cleaned.split('?', 2);
-	            var qs = utilStringQs(parts[1]);
+	    if (_content) {
+	      selection.call(_content);
+	    }
+	  }
 
-	            ['access_token', 'connectId', 'token'].forEach(function(param) {
-	                if (qs[param]) {
-	                    qs[param] = '{apikey}';
-	                }
-	            });
-	            cleaned = parts[0] + '?' + utilQsString(qs, true);  // true = soft encode
-	        }
+	  return section;
+	}
 
-	        // from wms/wmts api path parameters
-	        cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+	// {
+	//   key: 'string',     // required
+	//   value: 'string'    // optional
+	// }
+	//   -or-
+	// {
+	//   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+	// }
+	//
 
-	        return 'Custom (' + cleaned + ' )';
-	    };
+	function uiTagReference(what) {
+	  var wikibase = what.qid ? services.wikidata : services.osmWikibase;
+	  var tagReference = {};
 
+	  var _button = select(null);
 
-	    source.area = function() {
-	        return -2;  // sources in background pane are sorted by area
-	    };
+	  var _body = select(null);
 
+	  var _loaded;
 
-	    return source;
-	};
+	  var _showing;
 
-	function rendererTileLayer(context) {
-	    var transformProp = utilPrefixCSSProperty('Transform');
-	    var tiler = utilTiler();
+	  function load() {
+	    if (!wikibase) return;
 
-	    var _tileSize = 256;
-	    var _projection;
-	    var _cache = {};
-	    var _tileOrigin;
-	    var _zoom;
-	    var _source;
+	    _button.classed('tag-reference-loading', true);
 
+	    wikibase.getDocs(what, gotDocs);
+	  }
 
-	    function tileSizeAtZoom(d, z) {
-	        var EPSILON = 0.002;    // close seams
-	        return ((_tileSize * Math.pow(2, z - d[2])) / _tileSize) + EPSILON;
-	    }
+	  function gotDocs(err, docs) {
+	    _body.html('');
 
+	    if (!docs || !docs.title) {
+	      _body.append('p').attr('class', 'tag-reference-description').html(_t.html('inspector.no_documentation_key'));
 
-	    function atZoom(t, distance) {
-	        var power = Math.pow(2, distance);
-	        return [
-	            Math.floor(t[0] * power),
-	            Math.floor(t[1] * power),
-	            t[2] + distance
-	        ];
+	      done();
+	      return;
 	    }
 
-
-	    function lookUp(d) {
-	        for (var up = -1; up > -d[2]; up--) {
-	            var tile = atZoom(d, up);
-	            if (_cache[_source.url(tile)] !== false) {
-	                return tile;
-	            }
-	        }
+	    if (docs.imageURL) {
+	      _body.append('img').attr('class', 'tag-reference-wiki-image').attr('src', docs.imageURL).on('load', function () {
+	        done();
+	      }).on('error', function () {
+	        select(this).remove();
+	        done();
+	      });
+	    } else {
+	      done();
 	    }
 
+	    _body.append('p').attr('class', 'tag-reference-description').html(docs.description ? _mainLocalizer.htmlForLocalizedText(docs.description, docs.descriptionLocaleCode) : _t.html('inspector.no_documentation_key')).append('a').attr('class', 'tag-reference-edit').attr('target', '_blank').attr('title', _t('inspector.edit_reference')).attr('href', docs.editURL).call(svgIcon('#iD-icon-edit', 'inline'));
 
-	    function uniqueBy(a, n) {
-	        var o = [];
-	        var seen = {};
-	        for (var i = 0; i < a.length; i++) {
-	            if (seen[a[i][n]] === undefined) {
-	                o.push(a[i]);
-	                seen[a[i][n]] = true;
-	            }
-	        }
-	        return o;
-	    }
+	    if (docs.wiki) {
+	      _body.append('a').attr('class', 'tag-reference-link').attr('target', '_blank').attr('href', docs.wiki.url).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html(docs.wiki.text));
+	    } // Add link to info about "good changeset comments" - #2923
 
 
-	    function addSource(d) {
-	        d.push(_source.url(d));
-	        return d;
+	    if (what.key === 'comment') {
+	      _body.append('a').attr('class', 'tag-reference-comment-link').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', _t('commit.about_changeset_comments_link')).append('span').html(_t.html('commit.about_changeset_comments'));
 	    }
+	  }
 
+	  function done() {
+	    _loaded = true;
 
-	    // Update tiles based on current state of `projection`.
-	    function background(selection) {
-	        _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+	    _button.classed('tag-reference-loading', false);
 
-	        var pixelOffset;
-	        if (_source) {
-	            pixelOffset = [
-	                _source.offset()[0] * Math.pow(2, _zoom),
-	                _source.offset()[1] * Math.pow(2, _zoom)
-	            ];
-	        } else {
-	            pixelOffset = [0, 0];
-	        }
+	    _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');
 
-	        var translate = [
-	            _projection.translate()[0] + pixelOffset[0],
-	            _projection.translate()[1] + pixelOffset[1]
-	        ];
+	    _showing = true;
 
-	        tiler
-	            .scale(_projection.scale() * 2 * Math.PI)
-	            .translate(translate);
+	    _button.selectAll('svg.icon use').each(function () {
+	      var iconUse = select(this);
 
-	        _tileOrigin = [
-	            _projection.scale() * Math.PI - translate[0],
-	            _projection.scale() * Math.PI - translate[1]
-	        ];
+	      if (iconUse.attr('href') === '#iD-icon-info') {
+	        iconUse.attr('href', '#iD-icon-info-filled');
+	      }
+	    });
+	  }
 
-	        render(selection);
-	    }
+	  function hide() {
+	    _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+	      _body.classed('expanded', false);
+	    });
 
+	    _showing = false;
 
-	    // Derive the tiles onscreen, remove those offscreen and position them.
-	    // Important that this part not depend on `_projection` because it's
-	    // rentered when tiles load/error (see #644).
-	    function render(selection) {
-	        if (!_source) { return; }
-	        var requests = [];
-	        var showDebug = context.getDebug('tile') && !_source.overlay;
+	    _button.selectAll('svg.icon use').each(function () {
+	      var iconUse = select(this);
 
-	        if (_source.validZoom(_zoom)) {
-	            tiler.skipNullIsland(!!_source.overlay);
+	      if (iconUse.attr('href') === '#iD-icon-info-filled') {
+	        iconUse.attr('href', '#iD-icon-info');
+	      }
+	    });
+	  }
 
-	            tiler().forEach(function(d) {
-	                addSource(d);
-	                if (d[3] === '') { return; }
-	                if (typeof d[3] !== 'string') { return; } // Workaround for #2295
-	                requests.push(d);
-	                if (_cache[d[3]] === false && lookUp(d)) {
-	                    requests.push(addSource(lookUp(d)));
-	                }
-	            });
+	  tagReference.button = function (selection, klass, iconName) {
+	    _button = selection.selectAll('.tag-reference-button').data([0]);
+	    _button = _button.enter().append('button').attr('class', 'tag-reference-button ' + (klass || '')).attr('title', _t('icons.information')).call(svgIcon('#iD-icon-' + (iconName || 'inspect'))).merge(_button);
 
-	            requests = uniqueBy(requests, 3).filter(function(r) {
-	                // don't re-request tiles which have failed in the past
-	                return _cache[r[3]] !== false;
-	            });
-	        }
+	    _button.on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	        function load(d) {
-	            _cache[d[3]] = true;
-	            select(this)
-	                .on('error', null)
-	                .on('load', null)
-	                .classed('tile-loaded', true);
-	            render(selection);
-	        }
+	      if (_showing) {
+	        hide();
+	      } else if (_loaded) {
+	        done();
+	      } else {
+	        load();
+	      }
+	    });
+	  };
 
-	        function error(d) {
-	            _cache[d[3]] = false;
-	            select(this)
-	                .on('error', null)
-	                .on('load', null)
-	                .remove();
-	            render(selection);
-	        }
+	  tagReference.body = function (selection) {
+	    var itemID = what.qid || what.key + '-' + (what.value || '');
+	    _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
+	      return d;
+	    });
 
-	        function imageTransform(d) {
-	            var ts = _tileSize * Math.pow(2, _zoom - d[2]);
-	            var scale = tileSizeAtZoom(d, _zoom);
-	            return 'translate(' +
-	                ((d[0] * ts) - _tileOrigin[0]) + 'px,' +
-	                ((d[1] * ts) - _tileOrigin[1]) + 'px) ' +
-	                'scale(' + scale + ',' + scale + ')';
-	        }
+	    _body.exit().remove();
 
-	        function tileCenter(d) {
-	            var ts = _tileSize * Math.pow(2, _zoom - d[2]);
-	            return [
-	                ((d[0] * ts) - _tileOrigin[0] + (ts / 2)),
-	                ((d[1] * ts) - _tileOrigin[1] + (ts / 2))
-	            ];
-	        }
+	    _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);
 
-	        function debugTransform(d) {
-	            var coord = tileCenter(d);
-	            return 'translate(' + coord[0] + 'px,' + coord[1] + 'px)';
-	        }
+	    if (_showing === false) {
+	      hide();
+	    }
+	  };
 
+	  tagReference.showing = function (val) {
+	    if (!arguments.length) return _showing;
+	    _showing = val;
+	    return tagReference;
+	  };
 
-	        // Pick a representative tile near the center of the viewport
-	        // (This is useful for sampling the imagery vintage)
-	        var dims = tiler.size();
-	        var mapCenter = [dims[0] / 2, dims[1] / 2];
-	        var minDist = Math.max(dims[0], dims[1]);
-	        var nearCenter;
+	  return tagReference;
+	}
 
-	        requests.forEach(function(d) {
-	            var c = tileCenter(d);
-	            var dist = geoVecLength(c, mapCenter);
-	            if (dist < minDist) {
-	                minDist = dist;
-	                nearCenter = d;
-	            }
-	        });
+	function uiSectionRawTagEditor(id, context) {
+	  var section = uiSection(id, context).classes('raw-tag-editor').label(function () {
+	    var count = Object.keys(_tags).filter(function (d) {
+	      return d;
+	    }).length;
+	    return _t('inspector.title_count', {
+	      title: _t.html('inspector.tags'),
+	      count: count
+	    });
+	  }).expandedByDefault(false).disclosureContent(renderDisclosureContent);
+	  var taginfo = services.taginfo;
+	  var dispatch$1 = dispatch('change');
+	  var availableViews = [{
+	    id: 'list',
+	    icon: '#fas-th-list'
+	  }, {
+	    id: 'text',
+	    icon: '#fas-i-cursor'
+	  }];
 
+	  var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'
 
-	        var image = selection.selectAll('img')
-	            .data(requests, function(d) { return d[3]; });
 
-	        image.exit()
-	            .style(transformProp, imageTransform)
-	            .classed('tile-removing', true)
-	            .classed('tile-center', false)
-	            .each(function() {
-	                var tile = select(this);
-	                window.setTimeout(function() {
-	                    if (tile.classed('tile-removing')) {
-	                        tile.remove();
-	                    }
-	                }, 300);
-	            });
+	  var _readOnlyTags = []; // the keys in the order we want them to display
 
-	        image.enter()
-	          .append('img')
-	            .attr('class', 'tile')
-	            .attr('draggable', 'false')
-	            .style('width', _tileSize + 'px')
-	            .style('height', _tileSize + 'px')
-	            .attr('src', function(d) { return d[3]; })
-	            .on('error', error)
-	            .on('load', load)
-	          .merge(image)
-	            .style(transformProp, imageTransform)
-	            .classed('tile-debug', showDebug)
-	            .classed('tile-removing', false)
-	            .classed('tile-center', function(d) { return d === nearCenter; });
-
-
-
-	        var debug = selection.selectAll('.tile-label-debug')
-	            .data(showDebug ? requests : [], function(d) { return d[3]; });
-
-	        debug.exit()
-	            .remove();
-
-	        if (showDebug) {
-	            var debugEnter = debug.enter()
-	                .append('div')
-	                .attr('class', 'tile-label-debug');
-
-	            debugEnter
-	                .append('div')
-	                .attr('class', 'tile-label-debug-coord');
-
-	            debugEnter
-	                .append('div')
-	                .attr('class', 'tile-label-debug-vintage');
-
-	            debug = debug.merge(debugEnter);
-
-	            debug
-	                .style(transformProp, debugTransform);
-
-	            debug
-	                .selectAll('.tile-label-debug-coord')
-	                .text(function(d) { return d[2] + ' / ' + d[0] + ' / ' + d[1]; });
-
-	            debug
-	                .selectAll('.tile-label-debug-vintage')
-	                .each(function(d) {
-	                    var span = select(this);
-	                    var center = context.projection.invert(tileCenter(d));
-	                    _source.getMetadata(center, d, function(err, result) {
-	                        span.text((result && result.vintage && result.vintage.range) ||
-	                            _t('info_panels.background.vintage') + ': ' + _t('info_panels.background.unknown')
-	                        );
-	                    });
-	                });
-	        }
+	  var _orderedKeys = [];
+	  var _showBlank = false;
+	  var _pendingChange = null;
 
-	    }
+	  var _state;
 
+	  var _presets;
 
-	    background.projection = function(val) {
-	        if (!arguments.length) { return _projection; }
-	        _projection = val;
-	        return background;
-	    };
+	  var _tags;
 
+	  var _entityIDs;
 
-	    background.dimensions = function(val) {
-	        if (!arguments.length) { return tiler.size(); }
-	        tiler.size(val);
-	        return background;
-	    };
+	  var _didInteract = false;
 
+	  function interacted() {
+	    _didInteract = true;
+	  }
 
-	    background.source = function(val) {
-	        if (!arguments.length) { return _source; }
-	        _source = val;
-	        _tileSize = _source.tileSize;
-	        _cache = {};
-	        tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
-	        return background;
-	    };
+	  function renderDisclosureContent(wrap) {
+	    // remove deleted keys
+	    _orderedKeys = _orderedKeys.filter(function (key) {
+	      return _tags[key] !== undefined;
+	    }); // When switching to a different entity or changing the state (hover/select)
+	    // reorder the keys alphabetically.
+	    // We trigger this by emptying the `_orderedKeys` array, then it will be rebuilt here.
+	    // Otherwise leave their order alone - #5857, #5927
 
+	    var all = Object.keys(_tags).sort();
+	    var missingKeys = utilArrayDifference(all, _orderedKeys);
 
-	    return background;
-	}
+	    for (var i in missingKeys) {
+	      _orderedKeys.push(missingKeys[i]);
+	    } // assemble row data
 
-	var _imageryIndex = null;
 
-	function rendererBackground(context) {
-	  var dispatch$1 = dispatch('change');
-	  var detected = utilDetect();
-	  var baseLayer = rendererTileLayer(context).projection(context.projection);
-	  var _isValid = true;
-	  var _overlayLayers = [];
-	  var _brightness = 1;
-	  var _contrast = 1;
-	  var _saturation = 1;
-	  var _sharpness = 1;
+	    var rowData = _orderedKeys.map(function (key, i) {
+	      return {
+	        index: i,
+	        key: key,
+	        value: _tags[key]
+	      };
+	    }); // append blank row last, if necessary
 
 
-	  function ensureImageryIndex() {
-	    return _mainFileFetcher.get('imagery')
-	      .then(function (sources) {
-	        if (_imageryIndex) { return _imageryIndex; }
+	    if (!rowData.length || _showBlank) {
+	      _showBlank = false;
+	      rowData.push({
+	        index: rowData.length,
+	        key: '',
+	        value: ''
+	      });
+	    } // View Options
+
+
+	    var options = wrap.selectAll('.raw-tag-options').data([0]);
+	    options.exit().remove();
+	    var optionsEnter = options.enter().insert('div', ':first-child').attr('class', 'raw-tag-options');
+	    var optionEnter = optionsEnter.selectAll('.raw-tag-option').data(availableViews, function (d) {
+	      return d.id;
+	    }).enter();
+	    optionEnter.append('button').attr('class', function (d) {
+	      return 'raw-tag-option raw-tag-option-' + d.id + (_tagView === d.id ? ' selected' : '');
+	    }).attr('title', function (d) {
+	      return _t('icons.' + d.id);
+	    }).on('click', function (d3_event, d) {
+	      _tagView = d.id;
+	      corePreferences('raw-tag-editor-view', d.id);
+	      wrap.selectAll('.raw-tag-option').classed('selected', function (datum) {
+	        return datum === d;
+	      });
+	      wrap.selectAll('.tag-text').classed('hide', d.id !== 'text').each(setTextareaHeight);
+	      wrap.selectAll('.tag-list, .add-row').classed('hide', d.id !== 'list');
+	    }).each(function (d) {
+	      select(this).call(svgIcon(d.icon));
+	    }); // View as Text
 
-	        _imageryIndex = {
-	          imagery: sources,
-	          features: {}
-	        };
+	    var textData = rowsToText(rowData);
+	    var textarea = wrap.selectAll('.tag-text').data([0]);
+	    textarea = textarea.enter().append('textarea').attr('class', 'tag-text' + (_tagView !== 'text' ? ' hide' : '')).call(utilNoAuto).attr('placeholder', _t('inspector.key_value')).attr('spellcheck', 'false').merge(textarea);
+	    textarea.call(utilGetSetValue, textData).each(setTextareaHeight).on('input', setTextareaHeight).on('focus', interacted).on('blur', textChanged).on('change', textChanged); // View as List
 
-	        // use which-polygon to support efficient index and querying for imagery
-	        var features = sources.map(function (source) {
-	          if (!source.polygon) { return null; }
-	          // workaround for editor-layer-index weirdness..
-	          // Add an extra array nest to each element in `source.polygon`
-	          // so the rings are not treated as a bunch of holes:
-	          // what we have: [ [[outer],[hole],[hole]] ]
-	          // what we want: [ [[outer]],[[outer]],[[outer]] ]
-	          var rings = source.polygon.map(function (ring) { return [ring]; });
+	    var list = wrap.selectAll('.tag-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'tag-list' + (_tagView !== 'list' ? ' hide' : '')).merge(list); // Container for the Add button
 
-	          var feature = {
-	            type: 'Feature',
-	            properties: { id: source.id },
-	            geometry: { type: 'MultiPolygon', coordinates: rings }
-	          };
+	    var addRowEnter = wrap.selectAll('.add-row').data([0]).enter().append('div').attr('class', 'add-row' + (_tagView !== 'list' ? ' hide' : ''));
+	    addRowEnter.append('button').attr('class', 'add-tag').call(svgIcon('#iD-icon-plus', 'light')).on('click', addTag);
+	    addRowEnter.append('div').attr('class', 'space-value'); // preserve space
 
-	          _imageryIndex.features[source.id] = feature;
-	          return feature;
+	    addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+	    // Tag list items
 
-	        }).filter(Boolean);
+	    var items = list.selectAll('.tag-row').data(rowData, function (d) {
+	      return d.key;
+	    });
+	    items.exit().each(unbind).remove(); // Enter
 
-	        _imageryIndex.query = whichPolygon_1({ type: 'FeatureCollection', features: features });
+	    var itemsEnter = items.enter().append('li').attr('class', 'tag-row').classed('readonly', isReadOnly);
+	    var innerWrap = itemsEnter.append('div').attr('class', 'inner-wrap');
+	    innerWrap.append('div').attr('class', 'key-wrap').append('input').property('type', 'text').attr('class', 'key').call(utilNoAuto).on('focus', interacted).on('blur', keyChange).on('change', keyChange);
+	    innerWrap.append('div').attr('class', 'value-wrap').append('input').property('type', 'text').attr('class', 'value').call(utilNoAuto).on('focus', interacted).on('blur', valueChange).on('change', valueChange).on('keydown.push-more', pushMore);
+	    innerWrap.append('button').attr('class', 'form-field-button remove').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete')); // Update
 
+	    items = items.merge(itemsEnter).sort(function (a, b) {
+	      return a.index - b.index;
+	    });
+	    items.each(function (d) {
+	      var row = select(this);
+	      var key = row.select('input.key'); // propagate bound data
 
-	        // Instantiate `rendererBackgroundSource` objects for each source
-	        _imageryIndex.backgrounds = sources.map(function (source) {
-	          if (source.type === 'bing') {
-	            return rendererBackgroundSource.Bing(source, dispatch$1);
-	          } else if (/^EsriWorldImagery/.test(source.id)) {
-	            return rendererBackgroundSource.Esri(source);
-	          } else {
-	            return rendererBackgroundSource(source);
-	          }
-	        });
+	      var value = row.select('input.value'); // propagate bound data
 
-	        // Add 'None'
-	        _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None());
+	      if (_entityIDs && taginfo && _state !== 'hover') {
+	        bindTypeahead(key, value);
+	      }
 
-	        // Add 'Custom'
-	        var template = corePreferences('background-custom-template') || '';
-	        var custom = rendererBackgroundSource.Custom(template);
-	        _imageryIndex.backgrounds.unshift(custom);
+	      var referenceOptions = {
+	        key: d.key
+	      };
 
-	        return _imageryIndex;
-	      });
-	  }
+	      if (typeof d.value === 'string') {
+	        referenceOptions.value = d.value;
+	      }
 
+	      var reference = uiTagReference(referenceOptions);
 
-	  function background(selection) {
-	    var currSource = baseLayer.source();
+	      if (_state === 'hover') {
+	        reference.showing(false);
+	      }
 
-	    // If we are displaying an Esri basemap at high zoom,
-	    // check its tilemap to see how high the zoom can go
-	    if (context.map().zoom() > 18) {
-	      if (currSource && /^EsriWorldImagery/.test(currSource.id)) {
-	        var center = context.map().center();
-	        currSource.fetchTilemap(center);
+	      row.select('.inner-wrap') // propagate bound data
+	      .call(reference.button);
+	      row.call(reference.body);
+	      row.select('button.remove'); // propagate bound data
+	    });
+	    items.selectAll('input.key').attr('title', function (d) {
+	      return d.key;
+	    }).call(utilGetSetValue, function (d) {
+	      return d.key;
+	    }).attr('readonly', function (d) {
+	      return isReadOnly(d) || typeof d.value !== 'string' || null;
+	    });
+	    items.selectAll('input.value').attr('title', function (d) {
+	      return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : d.value;
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(d.value);
+	    }).attr('placeholder', function (d) {
+	      return typeof d.value === 'string' ? null : _t('inspector.multiple_values');
+	    }).call(utilGetSetValue, function (d) {
+	      return typeof d.value === 'string' ? d.value : '';
+	    }).attr('readonly', function (d) {
+	      return isReadOnly(d) || null;
+	    });
+	    items.selectAll('button.remove').on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'down', removeTag); // 'click' fires too late - #5878
+	  }
+
+	  function isReadOnly(d) {
+	    for (var i = 0; i < _readOnlyTags.length; i++) {
+	      if (d.key.match(_readOnlyTags[i]) !== null) {
+	        return true;
 	      }
 	    }
 
-	    // Is the imagery valid here? - #4827
-	    var sources = background.sources(context.map().extent());
-	    var wasValid = _isValid;
-	    _isValid = !!sources.filter(function (d) { return d === currSource; }).length;
+	    return false;
+	  }
 
-	    if (wasValid !== _isValid) {      // change in valid status
-	      background.updateImagery();
-	    }
+	  function setTextareaHeight() {
+	    if (_tagView !== 'text') return;
+	    var selection = select(this);
+	    var matches = selection.node().value.match(/\n/g);
+	    var lineCount = 2 + Number(matches && matches.length);
+	    var lineHeight = 20;
+	    selection.style('height', lineCount * lineHeight + 'px');
+	  }
 
+	  function stringify(s) {
+	    return JSON.stringify(s).slice(1, -1); // without leading/trailing "
+	  }
 
-	    var baseFilter = '';
-	    if (detected.cssfilters) {
-	      if (_brightness !== 1) {
-	        baseFilter += " brightness(" + _brightness + ")";
-	      }
-	      if (_contrast !== 1) {
-	        baseFilter += " contrast(" + _contrast + ")";
-	      }
-	      if (_saturation !== 1) {
-	        baseFilter += " saturate(" + _saturation + ")";
-	      }
-	      if (_sharpness < 1) {  // gaussian blur
-	        var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
-	        baseFilter += " blur(" + blur + "px)";
-	      }
+	  function unstringify(s) {
+	    var leading = '';
+	    var trailing = '';
+
+	    if (s.length < 1 || s.charAt(0) !== '"') {
+	      leading = '"';
 	    }
 
-	    var base = selection.selectAll('.layer-background')
-	      .data([0]);
+	    if (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
+	      trailing = '"';
+	    }
 
-	    base = base.enter()
-	      .insert('div', '.layer-data')
-	      .attr('class', 'layer layer-background')
-	      .merge(base);
+	    return JSON.parse(leading + s + trailing);
+	  }
 
-	    if (detected.cssfilters) {
-	      base.style('filter', baseFilter || null);
-	    } else {
-	      base.style('opacity', _brightness);
-	    }
+	  function rowsToText(rows) {
+	    var str = rows.filter(function (row) {
+	      return row.key && row.key.trim() !== '';
+	    }).map(function (row) {
+	      var rawVal = row.value;
+	      if (typeof rawVal !== 'string') rawVal = '*';
+	      var val = rawVal ? stringify(rawVal) : '';
+	      return stringify(row.key) + '=' + val;
+	    }).join('\n');
 
+	    if (_state !== 'hover' && str.length) {
+	      return str + '\n';
+	    }
 
-	    var imagery = base.selectAll('.layer-imagery')
-	      .data([0]);
+	    return str;
+	  }
 
-	    imagery.enter()
-	      .append('div')
-	      .attr('class', 'layer layer-imagery')
-	      .merge(imagery)
-	      .call(baseLayer);
+	  function textChanged() {
+	    var newText = this.value.trim();
+	    var newTags = {};
+	    newText.split('\n').forEach(function (row) {
+	      var m = row.match(/^\s*([^=]+)=(.*)$/);
 
+	      if (m !== null) {
+	        var k = context.cleanTagKey(unstringify(m[1].trim()));
+	        var v = context.cleanTagValue(unstringify(m[2].trim()));
+	        newTags[k] = v;
+	      }
+	    });
+	    var tagDiff = utilTagDiff(_tags, newTags);
+	    if (!tagDiff.length) return;
+	    _pendingChange = _pendingChange || {};
+	    tagDiff.forEach(function (change) {
+	      if (isReadOnly({
+	        key: change.key
+	      })) return; // skip unchanged multiselection placeholders
+
+	      if (change.newVal === '*' && typeof change.oldVal !== 'string') return;
+
+	      if (change.type === '-') {
+	        _pendingChange[change.key] = undefined;
+	      } else if (change.type === '+') {
+	        _pendingChange[change.key] = change.newVal || '';
+	      }
+	    });
 
-	    var maskFilter = '';
-	    var mixBlendMode = '';
-	    if (detected.cssfilters && _sharpness > 1) {  // apply unsharp mask
-	      mixBlendMode = 'overlay';
-	      maskFilter = 'saturate(0) blur(3px) invert(1)';
+	    if (Object.keys(_pendingChange).length === 0) {
+	      _pendingChange = null;
+	      return;
+	    }
 
-	      var contrast = _sharpness - 1;
-	      maskFilter += " contrast(" + contrast + ")";
+	    scheduleChange();
+	  }
 
-	      var brightness = d3_interpolateNumber(1, 0.85)(_sharpness - 1);
-	      maskFilter += " brightness(" + brightness + ")";
+	  function pushMore(d3_event) {
+	    // if pressing Tab on the last value field with content, add a blank row
+	    if (d3_event.keyCode === 9 && !d3_event.shiftKey && section.selection().selectAll('.tag-list li:last-child input.value').node() === this && utilGetSetValue(select(this))) {
+	      addTag();
 	    }
+	  }
 
-	    var mask = base.selectAll('.layer-unsharp-mask')
-	      .data(detected.cssfilters && _sharpness > 1 ? [0] : []);
+	  function bindTypeahead(key, value) {
+	    if (isReadOnly(key.datum())) return;
 
-	    mask.exit()
-	      .remove();
+	    if (Array.isArray(value.datum().value)) {
+	      value.call(uiCombobox(context, 'tag-value').minItems(1).fetcher(function (value, callback) {
+	        var keyString = utilGetSetValue(key);
+	        if (!_tags[keyString]) return;
+
+	        var data = _tags[keyString].filter(Boolean).map(function (tagValue) {
+	          return {
+	            value: tagValue,
+	            title: tagValue
+	          };
+	        });
 
-	    mask.enter()
-	      .append('div')
-	      .attr('class', 'layer layer-mask layer-unsharp-mask')
-	      .merge(mask)
-	      .call(baseLayer)
-	      .style('filter', maskFilter || null)
-	      .style('mix-blend-mode', mixBlendMode || null);
+	        callback(data);
+	      }));
+	      return;
+	    }
 
+	    var geometry = context.graph().geometry(_entityIDs[0]);
+	    key.call(uiCombobox(context, 'tag-key').fetcher(function (value, callback) {
+	      taginfo.keys({
+	        debounce: true,
+	        geometry: geometry,
+	        query: value
+	      }, function (err, data) {
+	        if (!err) {
+	          var filtered = data.filter(function (d) {
+	            return _tags[d.value] === undefined;
+	          });
+	          callback(sort(value, filtered));
+	        }
+	      });
+	    }));
+	    value.call(uiCombobox(context, 'tag-value').fetcher(function (value, callback) {
+	      taginfo.values({
+	        debounce: true,
+	        key: utilGetSetValue(key),
+	        geometry: geometry,
+	        query: value
+	      }, function (err, data) {
+	        if (!err) callback(sort(value, data));
+	      });
+	    }));
 
-	    var overlays = selection.selectAll('.layer-overlay')
-	      .data(_overlayLayers, function (d) { return d.source().name(); });
+	    function sort(value, data) {
+	      var sameletter = [];
+	      var other = [];
 
-	    overlays.exit()
-	      .remove();
+	      for (var i = 0; i < data.length; i++) {
+	        if (data[i].value.substring(0, value.length) === value) {
+	          sameletter.push(data[i]);
+	        } else {
+	          other.push(data[i]);
+	        }
+	      }
 
-	    overlays.enter()
-	      .insert('div', '.layer-data')
-	      .attr('class', 'layer layer-overlay')
-	      .merge(overlays)
-	      .each(function (layer, i, nodes) { return select(nodes[i]).call(layer); });
+	      return sameletter.concat(other);
+	    }
 	  }
 
+	  function unbind() {
+	    var row = select(this);
+	    row.selectAll('input.key').call(uiCombobox.off, context);
+	    row.selectAll('input.value').call(uiCombobox.off, context);
+	  }
 
-	  background.updateImagery = function() {
-	    var currSource = baseLayer.source();
-	    if (context.inIntro() || !currSource) { return; }
-
-	    var o = _overlayLayers
-	      .filter(function (d) { return !d.source().isLocatorOverlay() && !d.source().isHidden(); })
-	      .map(function (d) { return d.source().id; })
-	      .join(',');
+	  function keyChange(d3_event, d) {
+	    if (select(this).attr('readonly')) return;
+	    var kOld = d.key; // exit if we are currently about to delete this row anyway - #6366
 
-	    var meters = geoOffsetToMeters(currSource.offset());
-	    var EPSILON = 0.01;
-	    var x = +meters[0].toFixed(2);
-	    var y = +meters[1].toFixed(2);
-	    var hash = utilStringQs(window.location.hash);
+	    if (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) return;
+	    var kNew = context.cleanTagKey(this.value.trim()); // allow no change if the key should be readonly
 
-	    var id = currSource.id;
-	    if (id === 'custom') {
-	      id = "custom:" + (currSource.template());
+	    if (isReadOnly({
+	      key: kNew
+	    })) {
+	      this.value = kOld;
+	      return;
 	    }
 
-	    if (id) {
-	      hash.background = id;
-	    } else {
-	      delete hash.background;
-	    }
+	    if (kNew && kNew !== kOld && _tags[kNew] !== undefined) {
+	      // new key is already in use, switch focus to the existing row
+	      this.value = kOld; // reset the key
 
-	    if (o) {
-	      hash.overlays = o;
-	    } else {
-	      delete hash.overlays;
+	      section.selection().selectAll('.tag-list input.value').each(function (d) {
+	        if (d.key === kNew) {
+	          // send focus to that other value combo instead
+	          var input = select(this).node();
+	          input.focus();
+	          input.select();
+	        }
+	      });
+	      return;
 	    }
 
-	    if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
-	      hash.offset = x + "," + y;
-	    } else {
-	      delete hash.offset;
-	    }
+	    var row = this.parentNode.parentNode;
+	    var inputVal = select(row).selectAll('input.value');
+	    var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
+	    _pendingChange = _pendingChange || {};
 
-	    if (!window.mocha) {
-	      window.location.replace('#' + utilQsString(hash, true));
+	    if (kOld) {
+	      _pendingChange[kOld] = undefined;
 	    }
 
-	    var imageryUsed = [];
-	    var photoOverlaysUsed = [];
+	    _pendingChange[kNew] = vNew; // update the ordered key index so this row doesn't change position
 
-	    var currUsed = currSource.imageryUsed();
-	    if (currUsed && _isValid) {
-	      imageryUsed.push(currUsed);
-	    }
+	    var existingKeyIndex = _orderedKeys.indexOf(kOld);
 
-	    _overlayLayers
-	      .filter(function (d) { return !d.source().isLocatorOverlay() && !d.source().isHidden(); })
-	      .forEach(function (d) { return imageryUsed.push(d.source().imageryUsed()); });
+	    if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
+	    d.key = kNew; // update datum to avoid exit/enter on tag update
 
-	    var dataLayer = context.layers().layer('data');
-	    if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
-	      imageryUsed.push(dataLayer.getSrc());
-	    }
+	    d.value = vNew;
+	    this.value = kNew;
+	    utilGetSetValue(inputVal, vNew);
+	    scheduleChange();
+	  }
 
-	    var photoOverlayLayers = {
-	      streetside: 'Bing Streetside',
-	      mapillary: 'Mapillary Images',
-	      'mapillary-map-features': 'Mapillary Map Features',
-	      'mapillary-signs': 'Mapillary Signs',
-	      openstreetcam: 'OpenStreetCam Images'
-	    };
+	  function valueChange(d3_event, d) {
+	    if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered
 
-	    for (var layerID in photoOverlayLayers) {
-	      var layer = context.layers().layer(layerID);
-	      if (layer && layer.enabled()) {
-	        photoOverlaysUsed.push(layerID);
-	        imageryUsed.push(photoOverlayLayers[layerID]);
-	      }
-	    }
+	    if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366
 
-	    context.history().imageryUsed(imageryUsed);
-	    context.history().photoOverlaysUsed(photoOverlaysUsed);
-	  };
+	    if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
+	    _pendingChange = _pendingChange || {};
+	    _pendingChange[d.key] = context.cleanTagValue(this.value);
+	    scheduleChange();
+	  }
 
+	  function removeTag(d3_event, d) {
+	    if (isReadOnly(d)) return;
 
-	  background.sources = function (extent, zoom, includeCurrent) {
-	    if (!_imageryIndex) { return []; }   // called before init()?
+	    if (d.key === '') {
+	      // removing the blank row
+	      _showBlank = false;
+	      section.reRender();
+	    } else {
+	      // remove the key from the ordered key index
+	      _orderedKeys = _orderedKeys.filter(function (key) {
+	        return key !== d.key;
+	      });
+	      _pendingChange = _pendingChange || {};
+	      _pendingChange[d.key] = undefined;
+	      scheduleChange();
+	    }
+	  }
 
-	    var visible = {};
-	    (_imageryIndex.query.bbox(extent.rectangle(), true) || [])
-	      .forEach(function (d) { return visible[d.id] = true; });
+	  function addTag() {
+	    // Delay render in case this click is blurring an edited combo.
+	    // Without the setTimeout, the `content` render would wipe out the pending tag change.
+	    window.setTimeout(function () {
+	      _showBlank = true;
+	      section.reRender();
+	      section.selection().selectAll('.tag-list li:last-child input.key').node().focus();
+	    }, 20);
+	  }
 
-	    var currSource = baseLayer.source();
+	  function scheduleChange() {
+	    // Cache IDs in case the editor is reloaded before the change event is called. - #6028
+	    var entityIDs = _entityIDs; // Delay change in case this change is blurring an edited combo. - #5878
 
-	    return _imageryIndex.backgrounds.filter(function (source) {
-	      if (!source.polygon) { return true; }                          // always include imagery with worldwide coverage
-	      if (includeCurrent && currSource === source) { return true; }  // optionally include the current imagery
-	      if (zoom && zoom < 6) { return false; }                        // optionally exclude local imagery at low zooms
-	      return visible[source.id];                                 // include imagery visible in given extent
-	    });
-	  };
+	    window.setTimeout(function () {
+	      if (!_pendingChange) return;
+	      dispatch$1.call('change', this, entityIDs, _pendingChange);
+	      _pendingChange = null;
+	    }, 10);
+	  }
 
+	  section.state = function (val) {
+	    if (!arguments.length) return _state;
 
-	  background.dimensions = function (val) {
-	    if (!val) { return; }
-	    baseLayer.dimensions(val);
-	    _overlayLayers.forEach(function (layer) { return layer.dimensions(val); });
+	    if (_state !== val) {
+	      _orderedKeys = [];
+	      _state = val;
+	    }
+
+	    return section;
 	  };
 
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets;
+	    _presets = val;
 
-	  background.baseLayerSource = function(d) {
-	    if (!arguments.length) { return baseLayer.source(); }
+	    if (_presets && _presets.length && _presets[0].isFallback()) {
+	      section.disclosureExpanded(true); // don't collapse the disclosure if the mapper used the raw tag editor - #1881
+	    } else if (!_didInteract) {
+	      section.disclosureExpanded(null);
+	    }
 
-	    // test source against OSM imagery blacklists..
-	    var osm = context.connection();
-	    if (!osm) { return background; }
+	    return section;
+	  };
 
-	    var blacklists = osm.imageryBlacklists();
-	    var template = d.template();
-	    var fail = false;
-	    var tested = 0;
-	    var regex;
+	  section.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
+	    return section;
+	  };
 
-	    for (var i = 0; i < blacklists.length; i++) {
-	      try {
-	        regex = new RegExp(blacklists[i]);
-	        fail = regex.test(template);
-	        tested++;
-	        if (fail) { break; }
-	      } catch (e) {
-	        /* noop */
-	      }
-	    }
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	    // ensure at least one test was run.
-	    if (!tested) {
-	      regex = new RegExp('.*\.google(apis)?\..*/(vt|kh)[\?/].*([xyz]=.*){3}.*');
-	      fail = regex.test(template);
+	    if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _orderedKeys = [];
 	    }
 
-	    baseLayer.source(!fail ? d : background.findSource('none'));
-	    dispatch$1.call('change');
-	    background.updateImagery();
-	    return background;
-	  };
+	    return section;
+	  }; // pass an array of regular expressions to test against the tag key
 
 
-	  background.findSource = function (id) {
-	    if (!id || !_imageryIndex) { return null; }   // called before init()?
-	    return _imageryIndex.backgrounds.find(function (d) { return d.id && d.id === id; });
+	  section.readOnlyTags = function (val) {
+	    if (!arguments.length) return _readOnlyTags;
+	    _readOnlyTags = val;
+	    return section;
 	  };
 
+	  return utilRebind(section, dispatch$1, 'on');
+	}
 
-	  background.bing = function () {
-	    background.baseLayerSource(background.findSource('Bing'));
-	  };
+	function uiDataEditor(context) {
+	  var dataHeader = uiDataHeader();
+	  var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);
 
+	  var _datum;
 
-	  background.showsLayer = function (d) {
-	    var currSource = baseLayer.source();
-	    if (!d || !currSource) { return false; }
-	    return d.id === currSource.id || _overlayLayers.some(function (layer) { return d.id === layer.source().id; });
+	  function dataEditor(selection) {
+	    var header = selection.selectAll('.header').data([0]);
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').on('click', function () {
+	      context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h3').html(_t.html('map_data.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.data-editor').data([0]); // enter/update
+
+	    editor.enter().append('div').attr('class', 'modal-section data-editor').merge(editor).call(dataHeader.datum(_datum));
+	    var rte = body.selectAll('.raw-tag-editor').data([0]); // enter/update
+
+	    rte.enter().append('div').attr('class', 'raw-tag-editor data-editor').merge(rte).call(rawTagEditor.tags(_datum && _datum.properties || {}).state('hover').render).selectAll('textarea.tag-text').attr('readonly', true).classed('readonly', true);
+	  }
+
+	  dataEditor.datum = function (val) {
+	    if (!arguments.length) return _datum;
+	    _datum = val;
+	    return this;
 	  };
 
+	  return dataEditor;
+	}
 
-	  background.overlayLayerSources = function () {
-	    return _overlayLayers.map(function (layer) { return layer.source(); });
+	function modeSelectData(context, selectedDatum) {
+	  var mode = {
+	    id: 'select-data',
+	    button: 'browse'
 	  };
+	  var keybinding = utilKeybinding('select-data');
+	  var dataEditor = uiDataEditor(context);
+	  var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior]; // class the data as selected, or return to browse mode if the data is gone
 
+	  function selectData(d3_event, drawn) {
+	    var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
 
-	  background.toggleOverlayLayer = function (d) {
-	    var layer;
-	    for (var i = 0; i < _overlayLayers.length; i++) {
-	      layer = _overlayLayers[i];
-	      if (layer.source() === d) {
-	        _overlayLayers.splice(i, 1);
-	        dispatch$1.call('change');
-	        background.updateImagery();
-	        return;
+	    if (selection.empty()) {
+	      // Return to browse mode if selected DOM elements have
+	      // disappeared because the user moved them out of view..
+	      var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
+
+	      if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	        context.enter(modeBrowse(context));
 	      }
+	    } else {
+	      selection.classed('selected', true);
 	    }
+	  }
 
-	    layer = rendererTileLayer(context)
-	      .source(d)
-	      .projection(context.projection)
-	      .dimensions(baseLayer.dimensions()
-	    );
+	  function esc() {
+	    if (context.container().select('.combobox').size()) return;
+	    context.enter(modeBrowse(context));
+	  }
 
-	    _overlayLayers.push(layer);
-	    dispatch$1.call('change');
-	    background.updateImagery();
+	  mode.zoomToSelected = function () {
+	    var extent = geoExtent(d3_geoBounds(selectedDatum));
+	    context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
 	  };
 
+	  mode.enter = function () {
+	    behaviors.forEach(context.install);
+	    keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+	    select(document).call(keybinding);
+	    selectData();
+	    var sidebar = context.ui().sidebar;
+	    sidebar.show(dataEditor.datum(selectedDatum)); // expand the sidebar, avoid obscuring the data if needed
 
-	  background.nudge = function (d, zoom) {
-	    var currSource = baseLayer.source();
-	    if (currSource) {
-	      currSource.nudge(d, zoom);
-	      dispatch$1.call('change');
-	      background.updateImagery();
-	    }
-	    return background;
+	    var extent = geoExtent(d3_geoBounds(selectedDatum));
+	    sidebar.expand(sidebar.intersects(extent));
+	    context.map().on('drawn.select-data', selectData);
 	  };
 
-
-	  background.offset = function(d) {
-	    var currSource = baseLayer.source();
-	    if (!arguments.length) {
-	      return (currSource && currSource.offset()) || [0, 0];
-	    }
-	    if (currSource) {
-	      currSource.offset(d);
-	      dispatch$1.call('change');
-	      background.updateImagery();
-	    }
-	    return background;
+	  mode.exit = function () {
+	    behaviors.forEach(context.uninstall);
+	    select(document).call(keybinding.unbind);
+	    context.surface().selectAll('.layer-mapdata .selected').classed('selected hover', false);
+	    context.map().on('drawn.select-data', null);
+	    context.ui().sidebar.hide();
 	  };
 
+	  return mode;
+	}
 
-	  background.brightness = function(d) {
-	    if (!arguments.length) { return _brightness; }
-	    _brightness = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
-	    return background;
-	  };
+	function uiImproveOsmComments() {
+	  var _qaItem;
 
+	  function issueComments(selection) {
+	    // make the div immediately so it appears above the buttons
+	    var comments = selection.selectAll('.comments-container').data([0]);
+	    comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments); // must retrieve comments from API before they can be displayed
 
-	  background.contrast = function(d) {
-	    if (!arguments.length) { return _contrast; }
-	    _contrast = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
-	    return background;
-	  };
+	    services.improveOSM.getComments(_qaItem).then(function (d) {
+	      if (!d.comments) return; // nothing to do here
+
+	      var commentEnter = comments.selectAll('.comment').data(d.comments).enter().append('div').attr('class', 'comment');
+	      commentEnter.append('div').attr('class', 'comment-avatar').call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+	      var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
+	      var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
+	      metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
+	        var osm = services.osm;
+	        var selection = select(this);
 
+	        if (osm && d.username) {
+	          selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
+	        }
 
-	  background.saturation = function(d) {
-	    if (!arguments.length) { return _saturation; }
-	    _saturation = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
-	    return background;
-	  };
+	        selection.html(function (d) {
+	          return d.username;
+	        });
+	      });
+	      metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+	        return _t.html('note.status.commented', {
+	          when: localeDateString(d.timestamp)
+	        });
+	      });
+	      mainEnter.append('div').attr('class', 'comment-text').append('p').html(function (d) {
+	        return d.text;
+	      });
+	    })["catch"](function (err) {
+	      console.log(err); // eslint-disable-line no-console
+	    });
+	  }
+
+	  function localeDateString(s) {
+	    if (!s) return null;
+	    var options = {
+	      day: 'numeric',
+	      month: 'short',
+	      year: 'numeric'
+	    };
+	    var d = new Date(s * 1000); // timestamp is served in seconds, date takes ms
 
+	    if (isNaN(d.getTime())) return null;
+	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  }
 
-	  background.sharpness = function(d) {
-	    if (!arguments.length) { return _sharpness; }
-	    _sharpness = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
-	    return background;
+	  issueComments.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return issueComments;
 	  };
 
-	  var _loadPromise;
+	  return issueComments;
+	}
 
-	  background.ensureLoaded = function () {
+	function uiImproveOsmDetails(context) {
+	  var _qaItem;
+
+	  function issueDetail(d) {
+	    if (d.desc) return d.desc;
+	    var issueKey = d.issueKey;
+	    d.replacements = d.replacements || {};
+	    d.replacements["default"] = _t.html('inspector.unknown'); // special key `default` works as a fallback string
 
-	    if (_loadPromise) { return _loadPromise; }
+	    return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
+	  }
 
-	    function parseMapParams(qmap) {
-	      if (!qmap) { return false; }
-	      var params = qmap.split('/').map(Number);
-	      if (params.length < 3 || params.some(isNaN)) { return false; }
-	      return geoExtent([params[2], params[1]]);  // lon,lat
-	    }
+	  function improveOsmDetails(selection) {
+	    var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    details.exit().remove();
+	    var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
 
-	    var hash = utilStringQs(window.location.hash);
-	    var requested = hash.background || hash.layer;
-	    var extent = parseMapParams(hash.map);
+	    var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	    descriptionEnter.append('h4').html(_t.html('QA.keepRight.detail_description'));
+	    descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..
+
+	    var relatedEntities = [];
+	    descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
+	      var link = select(this);
+	      var isObjectLink = link.classed('error_object_link');
+	      var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
+	      var entity = context.hasEntity(entityID);
+	      relatedEntities.push(entityID); // Add click handler
 
-	    return _loadPromise = ensureImageryIndex()
-	      .then(function (imageryIndex) {
-	        var first = imageryIndex.backgrounds.length && imageryIndex.backgrounds[0];
+	      link.on('mouseenter', function () {
+	        utilHighlightEntities([entityID], true, context);
+	      }).on('mouseleave', function () {
+	        utilHighlightEntities([entityID], false, context);
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        utilHighlightEntities([entityID], false, context);
+	        var osmlayer = context.layers().layer('osm');
 
-	        var best;
-	        if (!requested && extent) {
-	          best = background.sources(extent).find(function (s) { return s.best(); });
+	        if (!osmlayer.enabled()) {
+	          osmlayer.enabled(true);
 	        }
 
-	        // Decide which background layer to display
-	        if (requested && requested.indexOf('custom:') === 0) {
-	          var template = requested.replace(/^custom:/, '');
-	          var custom = background.findSource('custom');
-	          background.baseLayerSource(custom.template(template));
-	          corePreferences('background-custom-template', template);
+	        context.map().centerZoom(_qaItem.loc, 20);
+
+	        if (entity) {
+	          context.enter(modeSelect(context, [entityID]));
 	        } else {
-	          background.baseLayerSource(
-	            background.findSource(requested) ||
-	            best ||
-	            background.findSource(corePreferences('background-last-used')) ||
-	            background.findSource('Bing') ||
-	            first ||
-	            background.findSource('none')
-	          );
+	          context.loadEntity(entityID, function () {
+	            context.enter(modeSelect(context, [entityID]));
+	          });
 	        }
+	      }); // Replace with friendly name if possible
+	      // (The entity may not yet be loaded into the graph)
 
-	        var locator = imageryIndex.backgrounds.find(function (d) { return d.overlay && d.default; });
-	        if (locator) {
-	          background.toggleOverlayLayer(locator);
-	        }
+	      if (entity) {
+	        var name = utilDisplayName(entity); // try to use common name
 
-	        var overlays = (hash.overlays || '').split(',');
-	        overlays.forEach(function (overlay) {
-	          overlay = background.findSource(overlay);
-	          if (overlay) {
-	            background.toggleOverlayLayer(overlay);
-	          }
-	        });
+	        if (!name && !isObjectLink) {
+	          var preset = _mainPresetIndex.match(entity, context.graph());
+	          name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+	        }
 
-	        if (hash.gpx) {
-	          var gpx = context.layers().layer('data');
-	          if (gpx) {
-	            gpx.url(hash.gpx, '.gpx');
-	          }
+	        if (name) {
+	          this.innerText = name;
 	        }
+	      }
+	    }); // Don't hide entities related to this error - #5880
 
-	        if (hash.offset) {
-	          var offset = hash.offset
-	            .replace(/;/g, ',')
-	            .split(',')
-	            .map(function (n) { return !isNaN(n) && n; });
+	    context.features().forceVisible(relatedEntities);
+	    context.map().pan([0, 0]); // trigger a redraw
+	  }
 
-	          if (offset.length === 2) {
-	            background.offset(geoMetersToOffset(offset));
-	          }
-	        }
-	      })
-	      .catch(function () { /* ignore */ });
+	  improveOsmDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmDetails;
 	  };
 
-
-	  return utilRebind(background, dispatch$1, 'on');
+	  return improveOsmDetails;
 	}
 
-	function rendererFeatures(context) {
-	    var dispatch$1 = dispatch('change', 'redraw');
-	    var features = utilRebind({}, dispatch$1, 'on');
-	    var _deferred = new Set();
-
-	    var traffic_roads = {
-	        'motorway': true,
-	        'motorway_link': true,
-	        'trunk': true,
-	        'trunk_link': true,
-	        'primary': true,
-	        'primary_link': true,
-	        'secondary': true,
-	        'secondary_link': true,
-	        'tertiary': true,
-	        'tertiary_link': true,
-	        'residential': true,
-	        'unclassified': true,
-	        'living_street': true
-	    };
-
-	    var service_roads = {
-	        'service': true,
-	        'road': true,
-	        'track': true
-	    };
-
-	    var paths = {
-	        'path': true,
-	        'footway': true,
-	        'cycleway': true,
-	        'bridleway': true,
-	        'steps': true,
-	        'pedestrian': true
-	    };
-
-	    var past_futures = {
-	        'proposed': true,
-	        'construction': true,
-	        'abandoned': true,
-	        'dismantled': true,
-	        'disused': true,
-	        'razed': true,
-	        'demolished': true,
-	        'obliterated': true
-	    };
+	function uiImproveOsmHeader() {
+	  var _qaItem;
 
-	    var _cullFactor = 1;
-	    var _cache = {};
-	    var _rules = {};
-	    var _stats = {};
-	    var _keys = [];
-	    var _hidden = [];
-	    var _forceVisible = {};
+	  function issueTitle(d) {
+	    var issueKey = d.issueKey;
+	    d.replacements = d.replacements || {};
+	    d.replacements["default"] = _t.html('inspector.unknown'); // special key `default` works as a fallback string
 
+	    return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
+	  }
 
-	    function update() {
-	        if (!window.mocha) {
-	            var hash = utilStringQs(window.location.hash);
-	            var disabled = features.disabled();
-	            if (disabled.length) {
-	                hash.disable_features = disabled.join(',');
-	            } else {
-	                delete hash.disable_features;
-	            }
-	            window.location.replace('#' + utilQsString(hash, true));
-	            corePreferences('disabled-features', disabled.join(','));
-	        }
-	        _hidden = features.hidden();
-	        dispatch$1.call('change');
-	        dispatch$1.call('redraw');
-	    }
+	  function improveOsmHeader(selection) {
+	    var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+	    var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+	      return d.id < 0;
+	    }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
+	      return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	    });
+	    svgEnter.append('polygon').attr('fill', 'currentColor').attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	    svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
+	      var picon = d.icon;
 
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
+	    });
+	    headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+	  }
 
-	    function defineRule(k, filter, max) {
-	        var isEnabled = true;
+	  improveOsmHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmHeader;
+	  };
 
-	        _keys.push(k);
-	        _rules[k] = {
-	            filter: filter,
-	            enabled: isEnabled,   // whether the user wants it enabled..
-	            count: 0,
-	            currentMax: (max || Infinity),
-	            defaultMax: (max || Infinity),
-	            enable: function() { this.enabled = true; this.currentMax = this.defaultMax; },
-	            disable: function() { this.enabled = false; this.currentMax = 0; },
-	            hidden: function() {
-	                return (this.count === 0 && !this.enabled) ||
-	                    this.count > this.currentMax * _cullFactor;
-	            },
-	            autoHidden: function() { return this.hidden() && this.currentMax > 0; }
-	        };
-	    }
+	  return improveOsmHeader;
+	}
 
+	function uiImproveOsmEditor(context) {
+	  var dispatch$1 = dispatch('change');
+	  var qaDetails = uiImproveOsmDetails(context);
+	  var qaComments = uiImproveOsmComments();
+	  var qaHeader = uiImproveOsmHeader();
 
-	    defineRule('points', function isPoint(tags, geometry) {
-	        return geometry === 'point';
-	    }, 200);
+	  var _qaItem;
 
-	    defineRule('traffic_roads', function isTrafficRoad(tags) {
-	        return traffic_roads[tags.highway];
-	    });
+	  function improveOsmEditor(selection) {
+	    var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').on('click', function () {
+	      return context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h3').html(_t.html('QA.improveOSM.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.qa-editor').data([0]);
+	    editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(qaComments.issue(_qaItem)).call(improveOsmSaveSection);
+	  }
 
-	    defineRule('service_roads', function isServiceRoad(tags) {
-	        return service_roads[tags.highway];
-	    });
+	  function improveOsmSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	    defineRule('paths', function isPath(tags) {
-	        return paths[tags.highway];
-	    });
+	    var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
+	    var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    }); // exit
 
-	    defineRule('buildings', function isBuilding(tags) {
-	        return (
-	            (!!tags.building && tags.building !== 'no') ||
-	            tags.parking === 'multi-storey' ||
-	            tags.parking === 'sheds' ||
-	            tags.parking === 'carports' ||
-	            tags.parking === 'garage_boxes'
-	        );
-	    }, 250);
-
-	    defineRule('building_parts', function isBuildingPart(tags) {
-	        return tags['building:part'];
-	    });
-
-	    defineRule('indoor', function isIndoor(tags) {
-	        return tags.indoor;
-	    });
-
-	    defineRule('landuse', function isLanduse(tags, geometry) {
-	        return geometry === 'area' &&
-	            !_rules.buildings.filter(tags) &&
-	            !_rules.building_parts.filter(tags) &&
-	            !_rules.indoor.filter(tags) &&
-	            !_rules.water.filter(tags) &&
-	            !_rules.pistes.filter(tags);
-	    });
-
-	    defineRule('boundaries', function isBoundary(tags) {
-	        return (
-	            !!tags.boundary
-	        ) && !(
-	            traffic_roads[tags.highway] ||
-	            service_roads[tags.highway] ||
-	            paths[tags.highway] ||
-	            tags.waterway ||
-	            tags.railway ||
-	            tags.landuse ||
-	            tags.natural ||
-	            tags.building ||
-	            tags.power
-	        );
-	    });
+	    saveSection.exit().remove(); // enter
 
-	    defineRule('water', function isWater(tags) {
-	        return (
-	            !!tags.waterway ||
-	            tags.natural === 'water' ||
-	            tags.natural === 'coastline' ||
-	            tags.natural === 'bay' ||
-	            tags.landuse === 'pond' ||
-	            tags.landuse === 'basin' ||
-	            tags.landuse === 'reservoir' ||
-	            tags.landuse === 'salt_pond'
-	        );
-	    });
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
+	    saveSectionEnter.append('h4').attr('class', '.qa-save-header').html(_t.html('note.newComment'));
+	    saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
+	      return d.newComment;
+	    }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update
 
-	    defineRule('rail', function isRail(tags) {
-	        return (
-	            !!tags.railway ||
-	            tags.landuse === 'railway'
-	        ) && !(
-	            traffic_roads[tags.highway] ||
-	            service_roads[tags.highway] ||
-	            paths[tags.highway]
-	        );
-	    });
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-	    defineRule('pistes', function isPiste(tags) {
-	        return tags['piste:type'];
-	    });
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim();
 
-	    defineRule('aerialways', function isPiste(tags) {
-	        return tags.aerialway &&
-	            tags.aerialway !== 'yes' &&
-	            tags.aerialway !== 'station';
-	    });
+	      if (val === '') {
+	        val = undefined;
+	      } // store the unsaved comment with the issue itself
 
-	    defineRule('power', function isPower(tags) {
-	        return !!tags.power;
-	    });
 
-	    // contains a past/future tag, but not in active use as a road/path/cycleway/etc..
-	    defineRule('past_future', function isPastFuture(tags) {
-	        if (
-	            traffic_roads[tags.highway] ||
-	            service_roads[tags.highway] ||
-	            paths[tags.highway]
-	        ) { return false; }
+	      _qaItem = _qaItem.update({
+	        newComment: val
+	      });
+	      var qaService = services.improveOSM;
 
-	        var strings = Object.keys(tags);
+	      if (qaService) {
+	        qaService.replaceItem(_qaItem);
+	      }
 
-	        for (var i = 0; i < strings.length; i++) {
-	            var s = strings[i];
-	            if (past_futures[s] || past_futures[tags[s]]) { return true; }
-	        }
-	        return false;
-	    });
+	      saveSection.call(qaSaveButtons);
+	    }
+	  }
 
-	    // Lines or areas that don't match another feature filter.
-	    // IMPORTANT: The 'others' feature must be the last one defined,
-	    //   so that code in getMatches can skip this test if `hasMatch = true`
-	    defineRule('others', function isOther(tags, geometry) {
-	        return (geometry === 'line' || geometry === 'area');
-	    });
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
+	    buttonSection.exit().remove(); // enter
 
-	    features.features = function() {
-	        return _rules;
-	    };
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+	    buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('QA.keepRight.save_comment'));
+	    buttonEnter.append('button').attr('class', 'button close-button action');
+	    buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.comment-button').attr('disabled', function (d) {
+	      return d.newComment ? null : true;
+	    }).on('click.comment', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	    features.keys = function() {
-	        return _keys;
-	    };
+	      var qaService = services.improveOSM;
 
+	      if (qaService) {
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch$1.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.close-button').html(function (d) {
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html("QA.keepRight.close".concat(andComment));
+	    }).on('click.close', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	    features.enabled = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return _rules[k].enabled; });
-	        }
-	        return _rules[k] && _rules[k].enabled;
-	    };
+	      var qaService = services.improveOSM;
 
+	      if (qaService) {
+	        d.newStatus = 'SOLVED';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch$1.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.ignore-button').html(function (d) {
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html("QA.keepRight.ignore".concat(andComment));
+	    }).on('click.ignore', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	    features.disabled = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return !_rules[k].enabled; });
-	        }
-	        return _rules[k] && !_rules[k].enabled;
-	    };
+	      var qaService = services.improveOSM;
 
+	      if (qaService) {
+	        d.newStatus = 'INVALID';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch$1.call('change', item);
+	        });
+	      }
+	    });
+	  } // NOTE: Don't change method name until UI v3 is merged
 
-	    features.hidden = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return _rules[k].hidden(); });
-	        }
-	        return _rules[k] && _rules[k].hidden();
-	    };
 
+	  improveOsmEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmEditor;
+	  };
 
-	    features.autoHidden = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return _rules[k].autoHidden(); });
-	        }
-	        return _rules[k] && _rules[k].autoHidden();
-	    };
+	  return utilRebind(improveOsmEditor, dispatch$1, 'on');
+	}
 
+	function uiKeepRightDetails(context) {
+	  var _qaItem;
 
-	    features.enable = function(k) {
-	        if (_rules[k] && !_rules[k].enabled) {
-	            _rules[k].enable();
-	            update();
-	        }
-	    };
+	  function issueDetail(d) {
+	    var itemType = d.itemType,
+	        parentIssueType = d.parentIssueType;
+	    var unknown = _t.html('inspector.unknown');
+	    var replacements = d.replacements || {};
+	    replacements["default"] = unknown; // special key `default` works as a fallback string
 
-	    features.enableAll = function() {
-	        var didEnable = false;
-	        for (var k in _rules) {
-	            if (!_rules[k].enabled) {
-	                didEnable = true;
-	                _rules[k].enable();
-	            }
-	        }
-	        if (didEnable) { update(); }
-	    };
+	    var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);
 
+	    if (detail === unknown) {
+	      detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
+	    }
 
-	    features.disable = function(k) {
-	        if (_rules[k] && _rules[k].enabled) {
-	            _rules[k].disable();
-	            update();
-	        }
-	    };
+	    return detail;
+	  }
 
-	    features.disableAll = function() {
-	        var didDisable = false;
-	        for (var k in _rules) {
-	            if (_rules[k].enabled) {
-	                didDisable = true;
-	                _rules[k].disable();
-	            }
-	        }
-	        if (didDisable) { update(); }
-	    };
+	  function keepRightDetails(selection) {
+	    var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    details.exit().remove();
+	    var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
 
+	    var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	    descriptionEnter.append('h4').html(_t.html('QA.keepRight.detail_description'));
+	    descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..
 
-	    features.toggle = function(k) {
-	        if (_rules[k]) {
-	            (function(f) { return f.enabled ? f.disable() : f.enable(); }(_rules[k]));
-	            update();
-	        }
-	    };
+	    var relatedEntities = [];
+	    descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
+	      var link = select(this);
+	      var isObjectLink = link.classed('error_object_link');
+	      var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
+	      var entity = context.hasEntity(entityID);
+	      relatedEntities.push(entityID); // Add click handler
 
+	      link.on('mouseenter', function () {
+	        utilHighlightEntities([entityID], true, context);
+	      }).on('mouseleave', function () {
+	        utilHighlightEntities([entityID], false, context);
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        utilHighlightEntities([entityID], false, context);
+	        var osmlayer = context.layers().layer('osm');
 
-	    features.resetStats = function() {
-	        for (var i = 0; i < _keys.length; i++) {
-	            _rules[_keys[i]].count = 0;
+	        if (!osmlayer.enabled()) {
+	          osmlayer.enabled(true);
 	        }
-	        dispatch$1.call('change');
-	    };
 
+	        context.map().centerZoomEase(_qaItem.loc, 20);
 
-	    features.gatherStats = function(d, resolver, dimensions) {
-	        var needsRedraw = false;
-	        var types = utilArrayGroupBy(d, 'type');
-	        var entities = [].concat(types.relation || [], types.way || [], types.node || []);
-	        var currHidden, geometry, matches, i, j;
-
-	        for (i = 0; i < _keys.length; i++) {
-	            _rules[_keys[i]].count = 0;
+	        if (entity) {
+	          context.enter(modeSelect(context, [entityID]));
+	        } else {
+	          context.loadEntity(entityID, function () {
+	            context.enter(modeSelect(context, [entityID]));
+	          });
 	        }
+	      }); // Replace with friendly name if possible
+	      // (The entity may not yet be loaded into the graph)
 
-	        // adjust the threshold for point/building culling based on viewport size..
-	        // a _cullFactor of 1 corresponds to a 1000x1000px viewport..
-	        _cullFactor = dimensions[0] * dimensions[1] / 1000000;
+	      if (entity) {
+	        var name = utilDisplayName(entity); // try to use common name
 
-	        for (i = 0; i < entities.length; i++) {
-	            geometry = entities[i].geometry(resolver);
-	            matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
-	            for (j = 0; j < matches.length; j++) {
-	                _rules[matches[j]].count++;
-	            }
+	        if (!name && !isObjectLink) {
+	          var preset = _mainPresetIndex.match(entity, context.graph());
+	          name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
 	        }
 
-	        currHidden = features.hidden();
-	        if (currHidden !== _hidden) {
-	            _hidden = currHidden;
-	            needsRedraw = true;
-	            dispatch$1.call('change');
+	        if (name) {
+	          this.innerText = name;
 	        }
+	      }
+	    }); // Don't hide entities related to this issue - #5880
 
-	        return needsRedraw;
-	    };
-
+	    context.features().forceVisible(relatedEntities);
+	    context.map().pan([0, 0]); // trigger a redraw
+	  }
 
-	    features.stats = function() {
-	        for (var i = 0; i < _keys.length; i++) {
-	            _stats[_keys[i]] = _rules[_keys[i]].count;
-	        }
+	  keepRightDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightDetails;
+	  };
 
-	        return _stats;
-	    };
+	  return keepRightDetails;
+	}
 
+	function uiKeepRightHeader() {
+	  var _qaItem;
 
-	    features.clear = function(d) {
-	        for (var i = 0; i < d.length; i++) {
-	            features.clearEntity(d[i]);
-	        }
-	    };
+	  function issueTitle(d) {
+	    var itemType = d.itemType,
+	        parentIssueType = d.parentIssueType;
+	    var unknown = _t.html('inspector.unknown');
+	    var replacements = d.replacements || {};
+	    replacements["default"] = unknown; // special key `default` works as a fallback string
 
+	    var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
 
-	    features.clearEntity = function(entity) {
-	        delete _cache[osmEntity.key(entity)];
-	    };
+	    if (title === unknown) {
+	      title = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
+	    }
 
+	    return title;
+	  }
 
-	    features.reset = function() {
-	        Array.from(_deferred).forEach(function(handle) {
-	            window.cancelIdleCallback(handle);
-	            _deferred.delete(handle);
-	        });
+	  function keepRightHeader(selection) {
+	    var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+	    var iconEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+	      return d.id < 0;
+	    });
+	    iconEnter.append('div').attr('class', function (d) {
+	      return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
+	    }).call(svgIcon('#iD-icon-bolt', 'qaItem-fill'));
+	    headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+	  }
 
-	        _cache = {};
-	    };
+	  keepRightHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightHeader;
+	  };
 
-	    // only certain relations are worth checking
-	    function relationShouldBeChecked(relation) {
-	        // multipolygon features have `area` geometry and aren't checked here
-	        return relation.tags.type === 'boundary';
-	    }
-
-	    features.getMatches = function(entity, resolver, geometry) {
-	        if (geometry === 'vertex' ||
-	            (geometry === 'relation' && !relationShouldBeChecked(entity))) { return {}; }
-
-	        var ent = osmEntity.key(entity);
-	        if (!_cache[ent]) {
-	            _cache[ent] = {};
-	        }
-
-	        if (!_cache[ent].matches) {
-	            var matches = {};
-	            var hasMatch = false;
-
-	            for (var i = 0; i < _keys.length; i++) {
-	                if (_keys[i] === 'others') {
-	                    if (hasMatch) { continue; }
-
-	                    // If an entity...
-	                    //   1. is a way that hasn't matched other 'interesting' feature rules,
-	                    if (entity.type === 'way') {
-	                        var parents = features.getParents(entity, resolver, geometry);
-
-	                        //   2a. belongs only to a single multipolygon relation
-	                        if ((parents.length === 1 && parents[0].isMultipolygon()) ||
-	                            // 2b. or belongs only to boundary relations
-	                            (parents.length > 0 && parents.every(function(parent) { return parent.tags.type === 'boundary'; }))) {
-
-	                            // ...then match whatever feature rules the parent relation has matched.
-	                            // see #2548, #2887
-	                            //
-	                            // IMPORTANT:
-	                            // For this to work, getMatches must be called on relations before ways.
-	                            //
-	                            var pkey = osmEntity.key(parents[0]);
-	                            if (_cache[pkey] && _cache[pkey].matches) {
-	                                matches = Object.assign({}, _cache[pkey].matches);  // shallow copy
-	                                continue;
-	                            }
-	                        }
-	                    }
-	                }
+	  return keepRightHeader;
+	}
 
-	                if (_rules[_keys[i]].filter(entity.tags, geometry)) {
-	                    matches[_keys[i]] = hasMatch = true;
-	                }
-	            }
-	            _cache[ent].matches = matches;
-	        }
+	function uiViewOnKeepRight() {
+	  var _qaItem;
 
-	        return _cache[ent].matches;
-	    };
+	  function viewOnKeepRight(selection) {
+	    var url;
 
+	    if (services.keepRight && _qaItem instanceof QAItem) {
+	      url = services.keepRight.issueURL(_qaItem);
+	    }
 
-	    features.getParents = function(entity, resolver, geometry) {
-	        if (geometry === 'point') { return []; }
+	    var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit
 
-	        var ent = osmEntity.key(entity);
-	        if (!_cache[ent]) {
-	            _cache[ent] = {};
-	        }
+	    link.exit().remove(); // enter
 
-	        if (!_cache[ent].parents) {
-	            var parents = [];
-	            if (geometry === 'vertex') {
-	                parents = resolver.parentWays(entity);
-	            } else {   // 'line', 'area', 'relation'
-	                parents = resolver.parentRelations(entity);
-	            }
-	            _cache[ent].parents = parents;
-	        }
-	        return _cache[ent].parents;
-	    };
+	    var linkEnter = link.enter().append('a').attr('class', 'view-on-keepRight').attr('target', '_blank').attr('rel', 'noopener') // security measure
+	    .attr('href', function (d) {
+	      return d;
+	    }).call(svgIcon('#iD-icon-out-link', 'inline'));
+	    linkEnter.append('span').html(_t.html('inspector.view_on_keepRight'));
+	  }
 
+	  viewOnKeepRight.what = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return viewOnKeepRight;
+	  };
 
-	    features.isHiddenPreset = function(preset, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!preset.tags) { return false; }
+	  return viewOnKeepRight;
+	}
 
-	        var test = preset.setTags({}, geometry);
-	        for (var key in _rules) {
-	            if (_rules[key].filter(test, geometry)) {
-	                if (_hidden.indexOf(key) !== -1) {
-	                    return key;
-	                }
-	                return false;
-	            }
-	        }
-	        return false;
-	    };
+	function uiKeepRightEditor(context) {
+	  var dispatch$1 = dispatch('change');
+	  var qaDetails = uiKeepRightDetails(context);
+	  var qaHeader = uiKeepRightHeader();
 
+	  var _qaItem;
 
-	    features.isHiddenFeature = function(entity, resolver, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!entity.version) { return false; }
-	        if (_forceVisible[entity.id]) { return false; }
+	  function keepRightEditor(selection) {
+	    var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').on('click', function () {
+	      return context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h3').html(_t.html('QA.keepRight.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.qa-editor').data([0]);
+	    editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(keepRightSaveSection);
+	    var footer = selection.selectAll('.footer').data([0]);
+	    footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnKeepRight().what(_qaItem));
+	  }
 
-	        var matches = Object.keys(features.getMatches(entity, resolver, geometry));
-	        return matches.length && matches.every(function(k) { return features.hidden(k); });
-	    };
+	  function keepRightSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
+	    var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
+	    var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    }); // exit
 
-	    features.isHiddenChild = function(entity, resolver, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!entity.version || geometry === 'point') { return false; }
-	        if (_forceVisible[entity.id]) { return false; }
+	    saveSection.exit().remove(); // enter
 
-	        var parents = features.getParents(entity, resolver, geometry);
-	        if (!parents.length) { return false; }
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
+	    saveSectionEnter.append('h4').attr('class', '.qa-save-header').html(_t.html('QA.keepRight.comment'));
+	    saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
+	      return d.newComment || d.comment;
+	    }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update
 
-	        for (var i = 0; i < parents.length; i++) {
-	            if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
-	                return false;
-	            }
-	        }
-	        return true;
-	    };
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim();
 
-	    features.hasHiddenConnections = function(entity, resolver) {
-	        if (!_hidden.length) { return false; }
+	      if (val === _qaItem.comment) {
+	        val = undefined;
+	      } // store the unsaved comment with the issue itself
 
-	        var childNodes, connections;
-	        if (entity.type === 'midpoint') {
-	            childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
-	            connections = [];
-	        } else {
-	            childNodes = entity.nodes ? resolver.childNodes(entity) : [];
-	            connections = features.getParents(entity, resolver, entity.geometry(resolver));
-	        }
 
-	        // gather ways connected to child nodes..
-	        connections = childNodes.reduce(function(result, e) {
-	            return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
-	        }, connections);
+	      _qaItem = _qaItem.update({
+	        newComment: val
+	      });
+	      var qaService = services.keepRight;
 
-	        return connections.some(function(e) {
-	            return features.isHidden(e, resolver, e.geometry(resolver));
-	        });
-	    };
+	      if (qaService) {
+	        qaService.replaceItem(_qaItem); // update keepright cache
+	      }
 
+	      saveSection.call(qaSaveButtons);
+	    }
+	  }
 
-	    features.isHidden = function(entity, resolver, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!entity.version) { return false; }
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	        var fn = (geometry === 'vertex' ? features.isHiddenChild : features.isHiddenFeature);
-	        return fn(entity, resolver, geometry);
-	    };
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
+	    buttonSection.exit().remove(); // enter
 
-	    features.filter = function(d, resolver) {
-	        if (!_hidden.length) { return d; }
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+	    buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('QA.keepRight.save_comment'));
+	    buttonEnter.append('button').attr('class', 'button close-button action');
+	    buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-	        var result = [];
-	        for (var i = 0; i < d.length; i++) {
-	            var entity = d[i];
-	            if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
-	                result.push(entity);
-	            }
-	        }
-	        return result;
-	    };
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.comment-button') // select and propagate data
+	    .attr('disabled', function (d) {
+	      return d.newComment ? null : true;
+	    }).on('click.comment', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
+	      var qaService = services.keepRight;
 
-	    features.forceVisible = function(entityIDs) {
-	        if (!arguments.length) { return Object.keys(_forceVisible); }
+	      if (qaService) {
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch$1.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.close-button') // select and propagate data
+	    .html(function (d) {
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html("QA.keepRight.close".concat(andComment));
+	    }).on('click.close', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	        _forceVisible = {};
-	        for (var i = 0; i < entityIDs.length; i++) {
-	            _forceVisible[entityIDs[i]] = true;
-	            var entity = context.hasEntity(entityIDs[i]);
-	            if (entity && entity.type === 'relation') {
-	                // also show relation members (one level deep)
-	                for (var j in entity.members) {
-	                    _forceVisible[entity.members[j].id] = true;
-	                }
-	            }
-	        }
-	        return features;
-	    };
+	      var qaService = services.keepRight;
 
+	      if (qaService) {
+	        d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)
 
-	    features.init = function() {
-	        var storage = corePreferences('disabled-features');
-	        if (storage) {
-	            var storageDisabled = storage.replace(/;/g, ',').split(',');
-	            storageDisabled.forEach(features.disable);
-	        }
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch$1.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.ignore-button') // select and propagate data
+	    .html(function (d) {
+	      var andComment = d.newComment ? '_comment' : '';
+	      return _t.html("QA.keepRight.ignore".concat(andComment));
+	    }).on('click.ignore', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	        var hash = utilStringQs(window.location.hash);
-	        if (hash.disable_features) {
-	            var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
-	            hashDisabled.forEach(features.disable);
-	        }
-	    };
+	      var qaService = services.keepRight;
 
+	      if (qaService) {
+	        d.newStatus = 'ignore'; // ignore permanently (false positive)
 
-	    // warm up the feature matching cache upon merging fetched data
-	    context.history().on('merge.features', function(newEntities) {
-	        if (!newEntities) { return; }
-	        var handle = window.requestIdleCallback(function() {
-	            var graph = context.graph();
-	            var types = utilArrayGroupBy(newEntities, 'type');
-	            // ensure that getMatches is called on relations before ways
-	            var entities = [].concat(types.relation || [], types.way || [], types.node || []);
-	            for (var i = 0; i < entities.length; i++) {
-	                var geometry = entities[i].geometry(graph);
-	                features.getMatches(entities[i], graph, geometry);
-	            }
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch$1.call('change', item);
 	        });
-	        _deferred.add(handle);
+	      }
 	    });
+	  } // NOTE: Don't change method name until UI v3 is merged
 
 
-	    return features;
+	  keepRightEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightEditor;
+	  };
+
+	  return utilRebind(keepRightEditor, dispatch$1, 'on');
 	}
 
-	// Touch targets control which other vertices we can drag a vertex onto.
-	//
-	// - the activeID - nope
-	// - 1 away (adjacent) to the activeID - yes (vertices will be merged)
-	// - 2 away from the activeID - nope (would create a self intersecting segment)
-	// - all others on a linear way - yes
-	// - all others on a closed way - nope (would create a self intersecting polygon)
-	//
-	// returns
-	// 0 = active vertex - no touch/connect
-	// 1 = passive vertex - yes touch/connect
-	// 2 = adjacent vertex - yes but pay attention segmenting a line here
-	//
-	function svgPassiveVertex(node, graph, activeID) {
-	    if (!activeID) { return 1; }
-	    if (activeID === node.id) { return 0; }
+	function uiOsmoseDetails(context) {
+	  var _qaItem;
 
-	    var parents = graph.parentWays(node);
+	  function issueString(d, type) {
+	    if (!d) return ''; // Issue strings are cached from Osmose API
 
-	    var i, j, nodes, isClosed, ix1, ix2, ix3, ix4, max;
+	    var s = services.osmose.getStrings(d.itemType);
+	    return type in s ? s[type] : '';
+	  }
 
-	    for (i = 0; i < parents.length; i++) {
-	        nodes = parents[i].nodes;
-	        isClosed = parents[i].isClosed();
-	        for (j = 0; j < nodes.length; j++) {   // find this vertex, look nearby
-	            if (nodes[j] === node.id) {
-	                ix1 = j - 2;
-	                ix2 = j - 1;
-	                ix3 = j + 1;
-	                ix4 = j + 2;
-
-	                if (isClosed) {  // wraparound if needed
-	                    max = nodes.length - 1;
-	                    if (ix1 < 0)   { ix1 = max + ix1; }
-	                    if (ix2 < 0)   { ix2 = max + ix2; }
-	                    if (ix3 > max) { ix3 = ix3 - max; }
-	                    if (ix4 > max) { ix4 = ix4 - max; }
-	                }
+	  function osmoseDetails(selection) {
+	    var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    details.exit().remove();
+	    var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // Description
 
-	                if (nodes[ix1] === activeID) { return 0; }        // no - prevent self intersect
-	                else if (nodes[ix2] === activeID) { return 2; }   // ok - adjacent
-	                else if (nodes[ix3] === activeID) { return 2; }   // ok - adjacent
-	                else if (nodes[ix4] === activeID) { return 0; }   // no - prevent self intersect
-	                else if (isClosed && nodes.indexOf(activeID) !== -1) { return 0; }  // no - prevent self intersect
-	            }
-	        }
-	    }
+	    if (issueString(_qaItem, 'detail')) {
+	      var div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	      div.append('h4').html(_t.html('QA.keepRight.detail_description'));
+	      div.append('p').attr('class', 'qa-details-description-text').html(function (d) {
+	        return issueString(d, 'detail');
+	      }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+	    } // Elements (populated later as data is requested)
 
-	    return 1;   // ok
-	}
-
-
-	function svgMarkerSegments(projection, graph, dt,
-	                                  shouldReverse,
-	                                  bothDirections) {
-	    return function(entity) {
-	        var i = 0;
-	        var offset = dt;
-	        var segments = [];
-	        var clip = d3_geoIdentity().clipExtent(projection.clipExtent()).stream;
-	        var coordinates = graph.childNodes(entity).map(function(n) { return n.loc; });
-	        var a, b;
-
-	        if (shouldReverse(entity)) {
-	            coordinates.reverse();
-	        }
-
-	        d3_geoStream({
-	            type: 'LineString',
-	            coordinates: coordinates
-	        }, projection.stream(clip({
-	            lineStart: function() {},
-	            lineEnd: function() { a = null; },
-	            point: function(x, y) {
-	                b = [x, y];
-
-	                if (a) {
-	                    var span = geoVecLength(a, b) - offset;
-
-	                    if (span >= 0) {
-	                        var heading = geoVecAngle(a, b);
-	                        var dx = dt * Math.cos(heading);
-	                        var dy = dt * Math.sin(heading);
-	                        var p = [
-	                            a[0] + offset * Math.cos(heading),
-	                            a[1] + offset * Math.sin(heading)
-	                        ];
-
-	                        // gather coordinates
-	                        var coord = [a, p];
-	                        for (span -= dt; span >= 0; span -= dt) {
-	                            p = geoVecAdd(p, [dx, dy]);
-	                            coord.push(p);
-	                        }
-	                        coord.push(b);
-
-	                        // generate svg paths
-	                        var segment = '';
-	                        var j;
-
-	                        for (j = 0; j < coord.length; j++) {
-	                            segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-	                        }
-	                        segments.push({ id: entity.id, index: i++, d: segment });
-
-	                        if (bothDirections(entity)) {
-	                            segment = '';
-	                            for (j = coord.length - 1; j >= 0; j--) {
-	                                segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-	                            }
-	                            segments.push({ id: entity.id, index: i++, d: segment });
-	                        }
-	                    }
 
-	                    offset = -span;
-	                }
+	    var detailsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+	    var elemsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection'); // Suggested Fix (mustn't exist for every issue type)
 
-	                a = b;
-	            }
-	        })));
+	    if (issueString(_qaItem, 'fix')) {
+	      var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-	        return segments;
-	    };
-	}
+	      _div.append('h4').html(_t.html('QA.osmose.fix_title'));
 
+	      _div.append('p').html(function (d) {
+	        return issueString(d, 'fix');
+	      }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+	    } // Common Pitfalls (mustn't exist for every issue type)
 
-	function svgPath(projection, graph, isArea) {
 
-	    // Explanation of magic numbers:
-	    // "padding" here allows space for strokes to extend beyond the viewport,
-	    // so that the stroke isn't drawn along the edge of the viewport when
-	    // the shape is clipped.
-	    //
-	    // When drawing lines, pad viewport by 5px.
-	    // When drawing areas, pad viewport by 65px in each direction to allow
-	    // for 60px area fill stroke (see ".fill-partial path.fill" css rule)
+	    if (issueString(_qaItem, 'trap')) {
+	      var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-	    var cache = {};
-	    var padding = isArea ? 65 : 5;
-	    var viewport = projection.clipExtent();
-	    var paddedExtent = [
-	        [viewport[0][0] - padding, viewport[0][1] - padding],
-	        [viewport[1][0] + padding, viewport[1][1] + padding]
-	    ];
-	    var clip = d3_geoIdentity().clipExtent(paddedExtent).stream;
-	    var project = projection.stream;
-	    var path = d3_geoPath()
-	        .projection({stream: function(output) { return project(clip(output)); }});
-
-	    var svgpath = function(entity) {
-	        if (entity.id in cache) {
-	            return cache[entity.id];
-	        } else {
-	            return cache[entity.id] = path(entity.asGeoJSON(graph));
-	        }
-	    };
+	      _div2.append('h4').html(_t.html('QA.osmose.trap_title'));
 
-	    svgpath.geojson = function(d) {
-	        if (d.__featurehash__ !== undefined) {
-	            if (d.__featurehash__ in cache) {
-	                return cache[d.__featurehash__];
-	            } else {
-	                return cache[d.__featurehash__] = path(d);
-	            }
-	        } else {
-	            return path(d);
-	        }
-	    };
+	      _div2.append('p').html(function (d) {
+	        return issueString(d, 'trap');
+	      }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+	    } // Save current item to check if UI changed by time request resolves
 
-	    return svgpath;
-	}
 
+	    var thisItem = _qaItem;
+	    services.osmose.loadIssueDetail(_qaItem).then(function (d) {
+	      // No details to add if there are no associated issue elements
+	      if (!d.elems || d.elems.length === 0) return; // Do nothing if UI has moved on by the time this resolves
 
-	function svgPointTransform(projection) {
-	    var svgpoint = function(entity) {
-	        // http://jsperf.com/short-array-join
-	        var pt = projection(entity.loc);
-	        return 'translate(' + pt[0] + ',' + pt[1] + ')';
-	    };
+	      if (context.selectedErrorID() !== thisItem.id && context.container().selectAll(".qaItem.osmose.hover.itemId-".concat(thisItem.id)).empty()) return; // Things like keys and values are dynamically added to a subtitle string
 
-	    svgpoint.geojson = function(d) {
-	        return svgpoint(d.properties.entity);
-	    };
+	      if (d.detail) {
+	        detailsDiv.append('h4').html(_t.html('QA.osmose.detail_title'));
+	        detailsDiv.append('p').html(function (d) {
+	          return d.detail;
+	        }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+	      } // Create list of linked issue elements
 
-	    return svgpoint;
-	}
 
+	      elemsDiv.append('h4').html(_t.html('QA.osmose.elems_title'));
+	      elemsDiv.append('ul').selectAll('li').data(d.elems).enter().append('li').append('a').attr('href', '#').attr('class', 'error_entity_link').html(function (d) {
+	        return d;
+	      }).each(function () {
+	        var link = select(this);
+	        var entityID = this.textContent;
+	        var entity = context.hasEntity(entityID); // Add click handler
+
+	        link.on('mouseenter', function () {
+	          utilHighlightEntities([entityID], true, context);
+	        }).on('mouseleave', function () {
+	          utilHighlightEntities([entityID], false, context);
+	        }).on('click', function (d3_event) {
+	          d3_event.preventDefault();
+	          utilHighlightEntities([entityID], false, context);
+	          var osmlayer = context.layers().layer('osm');
+
+	          if (!osmlayer.enabled()) {
+	            osmlayer.enabled(true);
+	          }
+
+	          context.map().centerZoom(d.loc, 20);
 
-	function svgRelationMemberTags(graph) {
-	    return function(entity) {
-	        var tags = entity.tags;
-	        var shouldCopyMultipolygonTags = !entity.hasInterestingTags();
-	        graph.parentRelations(entity).forEach(function(relation) {
-	            var type = relation.tags.type;
-	            if ((type === 'multipolygon' && shouldCopyMultipolygonTags) || type === 'boundary') {
-	                tags = Object.assign({}, relation.tags, tags);
-	            }
-	        });
-	        return tags;
-	    };
-	}
+	          if (entity) {
+	            context.enter(modeSelect(context, [entityID]));
+	          } else {
+	            context.loadEntity(entityID, function () {
+	              context.enter(modeSelect(context, [entityID]));
+	            });
+	          }
+	        }); // Replace with friendly name if possible
+	        // (The entity may not yet be loaded into the graph)
 
+	        if (entity) {
+	          var name = utilDisplayName(entity); // try to use common name
 
-	function svgSegmentWay(way, graph, activeID) {
-	    // When there is no activeID, we can memoize this expensive computation
-	    if (activeID === undefined) {
-	        return graph.transient(way, 'waySegments', getWaySegments);
-	    } else {
-	        return getWaySegments();
-	    }
-
-	    function getWaySegments() {
-	        var isActiveWay = (way.nodes.indexOf(activeID) !== -1);
-	        var features = { passive: [], active: [] };
-	        var start = {};
-	        var end = {};
-	        var node, type;
-
-	        for (var i = 0; i < way.nodes.length; i++) {
-	            node = graph.entity(way.nodes[i]);
-	            type = svgPassiveVertex(node, graph, activeID);
-	            end = { node: node, type: type };
-
-	            if (start.type !== undefined) {
-	                if (start.node.id === activeID || end.node.id === activeID) ; else if (isActiveWay && (start.type === 2 || end.type === 2)) {   // one adjacent vertex
-	                    pushActive(start, end, i);
-	                } else if (start.type === 0 && end.type === 0) {   // both active vertices
-	                    pushActive(start, end, i);
-	                } else {
-	                    pushPassive(start, end, i);
-	                }
-	            }
+	          if (!name) {
+	            var preset = _mainPresetIndex.match(entity, context.graph());
+	            name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+	          }
 
-	            start = end;
+	          if (name) {
+	            this.innerText = name;
+	          }
 	        }
+	      }); // Don't hide entities related to this issue - #5880
 
-	        return features;
+	      context.features().forceVisible(d.elems);
+	      context.map().pan([0, 0]); // trigger a redraw
+	    })["catch"](function (err) {
+	      console.log(err); // eslint-disable-line no-console
+	    });
+	  }
 
-	        function pushActive(start, end, index) {
-	            features.active.push({
-	                type: 'Feature',
-	                id: way.id + '-' + index + '-nope',
-	                properties: {
-	                    nope: true,
-	                    target: true,
-	                    entity: way,
-	                    nodes: [start.node, end.node],
-	                    index: index
-	                },
-	                geometry: {
-	                    type: 'LineString',
-	                    coordinates: [start.node.loc, end.node.loc]
-	                }
-	            });
-	        }
+	  osmoseDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseDetails;
+	  };
 
-	        function pushPassive(start, end, index) {
-	            features.passive.push({
-	                type: 'Feature',
-	                id: way.id + '-' + index,
-	                properties: {
-	                    target: true,
-	                    entity: way,
-	                    nodes: [start.node, end.node],
-	                    index: index
-	                },
-	                geometry: {
-	                    type: 'LineString',
-	                    coordinates: [start.node.loc, end.node.loc]
-	                }
-	            });
-	        }
-	    }
+	  return osmoseDetails;
 	}
 
-	function svgTagClasses() {
-	    var primaries = [
-	        'building', 'highway', 'railway', 'waterway', 'aeroway', 'aerialway',
-	        'piste:type', 'boundary', 'power', 'amenity', 'natural', 'landuse',
-	        'leisure', 'military', 'place', 'man_made', 'route', 'attraction',
-	        'building:part', 'indoor'
-	    ];
-	    var statuses = [
-	        // nonexistent, might be built
-	        'proposed', 'planned',
-	        // under maintentance or between groundbreaking and opening
-	        'construction',
-	        // existent but not functional
-	        'disused',
-	        // dilapidated to nonexistent
-	        'abandoned',
-	        // nonexistent, still may appear in imagery
-	        'dismantled', 'razed', 'demolished', 'obliterated',
-	        // existent occasionally, e.g. stormwater drainage basin
-	        'intermittent'
-	    ];
-	    var secondaries = [
-	        'oneway', 'bridge', 'tunnel', 'embankment', 'cutting', 'barrier',
-	        'surface', 'tracktype', 'footway', 'crossing', 'service', 'sport',
-	        'public_transport', 'location', 'parking', 'golf', 'type', 'leisure',
-	        'man_made', 'indoor'
-	    ];
-	    var _tags = function(entity) { return entity.tags; };
-
-
-	    var tagClasses = function(selection) {
-	        selection.each(function tagClassesEach(entity) {
-	            var value = this.className;
-
-	            if (value.baseVal !== undefined) {
-	                value = value.baseVal;
-	            }
+	function uiOsmoseHeader() {
+	  var _qaItem;
 
-	            var t = _tags(entity);
+	  function issueTitle(d) {
+	    var unknown = _t('inspector.unknown');
+	    if (!d) return unknown; // Issue titles supplied by Osmose
 
-	            var computed = tagClasses.getClassesString(t, value);
+	    var s = services.osmose.getStrings(d.itemType);
+	    return 'title' in s ? s.title : unknown;
+	  }
 
-	            if (computed !== value) {
-	                select(this).attr('class', computed);
-	            }
-	        });
-	    };
+	  function osmoseHeader(selection) {
+	    var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    });
+	    header.exit().remove();
+	    var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+	    var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+	      return d.id < 0;
+	    }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
+	      return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	    });
+	    svgEnter.append('polygon').attr('fill', function (d) {
+	      return services.osmose.getColor(d.item);
+	    }).attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	    svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
+	      var picon = d.icon;
 
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
+	    });
+	    headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+	  }
 
-	    tagClasses.getClassesString = function(t, value) {
-	        var primary, status;
-	        var i, j, k, v;
+	  osmoseHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseHeader;
+	  };
 
-	        // in some situations we want to render perimeter strokes a certain way
-	        var overrideGeometry;
-	        if (/\bstroke\b/.test(value)) {
-	            if (!!t.barrier && t.barrier !== 'no') {
-	                overrideGeometry = 'line';
-	            }
-	        }
+	  return osmoseHeader;
+	}
 
-	        // preserve base classes (nothing with `tag-`)
-	        var classes = value.trim().split(/\s+/)
-	            .filter(function(klass) {
-	                return klass.length && !/^tag-/.test(klass);
-	            })
-	            .map(function(klass) {  // special overrides for some perimeter strokes
-	                return (klass === 'line' || klass === 'area') ? (overrideGeometry || klass) : klass;
-	            });
+	function uiViewOnOsmose() {
+	  var _qaItem;
 
-	        // pick at most one primary classification tag..
-	        for (i = 0; i < primaries.length; i++) {
-	            k = primaries[i];
-	            v = t[k];
-	            if (!v || v === 'no') { continue; }
+	  function viewOnOsmose(selection) {
+	    var url;
 
-	            if (k === 'piste:type') {  // avoid a ':' in the class name
-	                k = 'piste';
-	            } else if (k === 'building:part') {  // avoid a ':' in the class name
-	                k = 'building_part';
-	            }
+	    if (services.osmose && _qaItem instanceof QAItem) {
+	      url = services.osmose.itemURL(_qaItem);
+	    }
 
-	            primary = k;
-	            if (statuses.indexOf(v) !== -1) {   // e.g. `railway=abandoned`
-	                status = v;
-	                classes.push('tag-' + k);
-	            } else {
-	                classes.push('tag-' + k);
-	                classes.push('tag-' + k + '-' + v);
-	            }
+	    var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit
 
-	            break;
-	        }
+	    link.exit().remove(); // enter
 
-	        if (!primary) {
-	            for (i = 0; i < statuses.length; i++) {
-	                for (j = 0; j < primaries.length; j++) {
-	                    k = statuses[i] + ':' + primaries[j];  // e.g. `demolished:building=yes`
-	                    v = t[k];
-	                    if (!v || v === 'no') { continue; }
+	    var linkEnter = link.enter().append('a').attr('class', 'view-on-osmose').attr('target', '_blank').attr('rel', 'noopener') // security measure
+	    .attr('href', function (d) {
+	      return d;
+	    }).call(svgIcon('#iD-icon-out-link', 'inline'));
+	    linkEnter.append('span').html(_t.html('inspector.view_on_osmose'));
+	  }
 
-	                    status = statuses[i];
-	                    break;
-	                }
-	            }
-	        }
+	  viewOnOsmose.what = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return viewOnOsmose;
+	  };
 
-	        // add at most one status tag, only if relates to primary tag..
-	        if (!status) {
-	            for (i = 0; i < statuses.length; i++) {
-	                k = statuses[i];
-	                v = t[k];
-	                if (!v || v === 'no') { continue; }
+	  return viewOnOsmose;
+	}
 
-	                if (v === 'yes') {   // e.g. `railway=rail + abandoned=yes`
-	                    status = k;
-	                }
-	                else if (primary && primary === v) {  // e.g. `railway=rail + abandoned=railway`
-	                    status = k;
-	                } else if (!primary && primaries.indexOf(v) !== -1) {  // e.g. `abandoned=railway`
-	                    status = k;
-	                    primary = v;
-	                    classes.push('tag-' + v);
-	                }  // else ignore e.g.  `highway=path + abandoned=railway`
-
-	                if (status) { break; }
-	            }
-	        }
+	function uiOsmoseEditor(context) {
+	  var dispatch$1 = dispatch('change');
+	  var qaDetails = uiOsmoseDetails(context);
+	  var qaHeader = uiOsmoseHeader();
 
-	        if (status) {
-	            classes.push('tag-status');
-	            classes.push('tag-status-' + status);
-	        }
+	  var _qaItem;
 
-	        // add any secondary tags
-	        for (i = 0; i < secondaries.length; i++) {
-	            k = secondaries[i];
-	            v = t[k];
-	            if (!v || v === 'no' || k === primary) { continue; }
-	            classes.push('tag-' + k);
-	            classes.push('tag-' + k + '-' + v);
-	        }
+	  function osmoseEditor(selection) {
+	    var header = selection.selectAll('.header').data([0]);
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'close').on('click', function () {
+	      return context.enter(modeBrowse(context));
+	    }).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h3').html(_t.html('QA.osmose.title'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body);
+	    var editor = body.selectAll('.qa-editor').data([0]);
+	    editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(osmoseSaveSection);
+	    var footer = selection.selectAll('.footer').data([0]);
+	    footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOsmose().what(_qaItem));
+	  }
 
-	        // For highways, look for surface tagging..
-	        if ((primary === 'highway' && !osmPathHighwayTagValues[t.highway]) || primary === 'aeroway') {
-	            var surface = t.highway === 'track' ? 'unpaved' : 'paved';
-	            for (k in t) {
-	                v = t[k];
-	                if (k in osmPavedTags) {
-	                    surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
-	                }
-	                if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
-	                    surface = 'semipaved';
-	                }
-	            }
-	            classes.push('tag-' + surface);
-	        }
+	  function osmoseSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	        // If this is a wikidata-tagged item, add a class for that..
-	        if (t.wikidata || t['brand:wikidata']) {
-	            classes.push('tag-wikidata');
-	        }
+	    var isShown = _qaItem && isSelected;
+	    var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    }); // exit
 
-	        return classes.join(' ').trim();
-	    };
+	    saveSection.exit().remove(); // enter
 
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update
 
-	    tagClasses.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-	        return tagClasses;
-	    };
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+	  }
 
-	    return tagClasses;
-	}
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	// Patterns only work in Firefox when set directly on element.
-	// (This is not a bug: https://bugzilla.mozilla.org/show_bug.cgi?id=750632)
-	var patterns = {
-	    // tag - pattern name
-	    // -or-
-	    // tag - value - pattern name
-	    // -or-
-	    // tag - value - rules (optional tag-values, pattern name)
-	    // (matches earlier rules first, so fallback should be last entry)
-	    amenity: {
-	        grave_yard: 'cemetery',
-	        fountain: 'water_standing'
-	    },
-	    landuse: {
-	        cemetery: [
-	            { religion: 'christian', pattern: 'cemetery_christian' },
-	            { religion: 'buddhist', pattern: 'cemetery_buddhist' },
-	            { religion: 'muslim', pattern: 'cemetery_muslim' },
-	            { religion: 'jewish', pattern: 'cemetery_jewish' },
-	            { pattern: 'cemetery' }
-	        ],
-	        construction: 'construction',
-	        farmland: 'farmland',
-	        farmyard: 'farmyard',
-	        forest: [
-	            { leaf_type: 'broadleaved', pattern: 'forest_broadleaved' },
-	            { leaf_type: 'needleleaved', pattern: 'forest_needleleaved' },
-	            { leaf_type: 'leafless', pattern: 'forest_leafless' },
-	            { pattern: 'forest' } // same as 'leaf_type:mixed'
-	        ],
-	        grave_yard: 'cemetery',
-	        grass: [
-	            { golf: 'green', pattern: 'golf_green' },
-	            { pattern: 'grass' } ],
-	        landfill: 'landfill',
-	        meadow: 'meadow',
-	        military: 'construction',
-	        orchard: 'orchard',
-	        quarry: 'quarry',
-	        vineyard: 'vineyard'
-	    },
-	    natural: {
-	        beach: 'beach',
-	        grassland: 'grass',
-	        sand: 'beach',
-	        scrub: 'scrub',
-	        water: [
-	            { water: 'pond', pattern: 'pond' },
-	            { water: 'reservoir', pattern: 'water_standing' },
-	            { pattern: 'waves' }
-	        ],
-	        wetland: [
-	            { wetland: 'marsh', pattern: 'wetland_marsh' },
-	            { wetland: 'swamp', pattern: 'wetland_swamp' },
-	            { wetland: 'bog', pattern: 'wetland_bog' },
-	            { wetland: 'reedbed', pattern: 'wetland_reedbed' },
-	            { pattern: 'wetland' }
-	        ],
-	        wood: [
-	            { leaf_type: 'broadleaved', pattern: 'forest_broadleaved' },
-	            { leaf_type: 'needleleaved', pattern: 'forest_needleleaved' },
-	            { leaf_type: 'leafless', pattern: 'forest_leafless' },
-	            { pattern: 'forest' } // same as 'leaf_type:mixed'
-	        ]
-	    },
-	    traffic_calming: {
-	        island: [
-	            { surface: 'grass', pattern: 'grass' } ],
-	        chicane: [
-	            { surface: 'grass', pattern: 'grass' } ],
-	        choker: [
-	            { surface: 'grass', pattern: 'grass' } ]
-	    }
-	};
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	function svgTagPattern(tags) {
-	    // Skip pattern filling if this is a building (buildings don't get patterns applied)
-	    if (tags.building && tags.building !== 'no') {
-	        return null;
-	    }
+	    buttonSection.exit().remove(); // enter
 
-	    for (var tag in patterns) {
-	        var entityValue = tags[tag];
-	        if (!entityValue) { continue; }
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+	    buttonEnter.append('button').attr('class', 'button close-button action');
+	    buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-	        if (typeof patterns[tag] === 'string') { // extra short syntax (just tag) - pattern name
-	            return 'pattern-' + patterns[tag];
-	        } else {
-	            var values = patterns[tag];
-	            for (var value in values) {
-	                if (entityValue !== value) { continue; }
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.select('.close-button').html(_t.html('QA.keepRight.close')).on('click.close', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	                var rules = values[value];
-	                if (typeof rules === 'string') { // short syntax - pattern name
-	                    return 'pattern-' + rules;
-	                }
+	      var qaService = services.osmose;
 
-	                // long syntax - rule array
-	                for (var ruleKey in rules) {
-	                    var rule = rules[ruleKey];
-
-	                    var pass = true;
-	                    for (var criterion in rule) {
-	                        if (criterion !== 'pattern') { // reserved for pattern name
-	                            // The only rule is a required tag-value pair
-	                            var v = tags[criterion];
-	                            if (!v || v !== rule[criterion]) {
-	                                pass = false;
-	                                break;
-	                            }
-	                        }
-	                    }
+	      if (qaService) {
+	        d.newStatus = 'done';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch$1.call('change', item);
+	        });
+	      }
+	    });
+	    buttonSection.select('.ignore-button').html(_t.html('QA.keepRight.ignore')).on('click.ignore', function (d3_event, d) {
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	                    if (pass) {
-	                        return 'pattern-' + rule.pattern;
-	                    }
-	                }
-	            }
-	        }
-	    }
+	      var qaService = services.osmose;
 
-	    return null;
-	}
+	      if (qaService) {
+	        d.newStatus = 'false';
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch$1.call('change', item);
+	        });
+	      }
+	    });
+	  } // NOTE: Don't change method name until UI v3 is merged
 
-	function svgAreas(projection, context) {
 
+	  osmoseEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseEditor;
+	  };
 
-	    function getPatternStyle(tags) {
-	        var imageID = svgTagPattern(tags);
-	        if (imageID) {
-	            return 'url("#ideditor-' + imageID + '")';
-	        }
-	        return '';
-	    }
+	  return utilRebind(osmoseEditor, dispatch$1, 'on');
+	}
 
+	function modeSelectError(context, selectedErrorID, selectedErrorService) {
+	  var mode = {
+	    id: 'select-error',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('select-error');
+	  var errorService = services[selectedErrorService];
+	  var errorEditor;
 
-	    function drawTargets(selection, graph, entities, filter) {
-	        var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-	        var getPath = svgPath(projection).geojson;
-	        var activeID = context.activeID();
-	        var base = context.history().base();
+	  switch (selectedErrorService) {
+	    case 'improveOSM':
+	      errorEditor = uiImproveOsmEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
-	        // The targets and nopes will be MultiLineString sub-segments of the ways
-	        var data = { targets: [], nopes: [] };
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
 
-	        entities.forEach(function(way) {
-	            var features = svgSegmentWay(way, graph, activeID);
-	            data.targets.push.apply(data.targets, features.passive);
-	            data.nopes.push.apply(data.nopes, features.active);
-	        });
+	    case 'keepRight':
+	      errorEditor = uiKeepRightEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
 
-	        // Targets allow hover and vertex snapping
-	        var targetData = data.targets.filter(getPath);
-	        var targets = selection.selectAll('.area.target-allowed')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(targetData, function key(d) { return d.id; });
+	    case 'osmose':
+	      errorEditor = uiOsmoseEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
+	  }
 
-	        var segmentWasEdited = function(d) {
-	            var wayID = d.properties.entity.id;
-	            // if the whole line was edited, don't draw segment changes
-	            if (!base.entities[wayID] ||
-	                !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-	                return false;
-	            }
-	            return d.properties.nodes.some(function(n) {
-	                return !base.entities[n.id] ||
-	                       !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
-	            });
-	        };
+	  var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
 
-	        // enter/update
-	        targets.enter()
-	            .append('path')
-	            .merge(targets)
-	            .attr('d', getPath)
-	            .attr('class', function(d) { return 'way area target target-allowed ' + targetClass + d.id; })
-	            .classed('segment-edited', segmentWasEdited);
-
-
-	        // NOPE
-	        var nopeData = data.nopes.filter(getPath);
-	        var nopes = selection.selectAll('.area.target-nope')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(nopeData, function key(d) { return d.id; });
-
-	        // exit
-	        nopes.exit()
-	            .remove();
-
-	        // enter/update
-	        nopes.enter()
-	            .append('path')
-	            .merge(nopes)
-	            .attr('d', getPath)
-	            .attr('class', function(d) { return 'way area target target-nope ' + nopeClass + d.id; })
-	            .classed('segment-edited', segmentWasEdited);
-	    }
-
-
-	    function drawAreas(selection, graph, entities, filter) {
-	        var path = svgPath(projection, graph, true);
-	        var areas = {};
-	        var multipolygon;
-	        var base = context.history().base();
-
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            if (entity.geometry(graph) !== 'area') { continue; }
-
-	            multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
-	            if (multipolygon) {
-	                areas[multipolygon.id] = {
-	                    entity: multipolygon.mergeTags(entity.tags),
-	                    area: Math.abs(entity.area(graph))
-	                };
-	            } else if (!areas[entity.id]) {
-	                areas[entity.id] = {
-	                    entity: entity,
-	                    area: Math.abs(entity.area(graph))
-	                };
-	            }
-	        }
+	  function checkSelectedID() {
+	    if (!errorService) return;
+	    var error = errorService.getError(selectedErrorID);
 
-	        var fills = Object.values(areas).filter(function hasPath(a) { return path(a.entity); });
-	        fills.sort(function areaSort(a, b) { return b.area - a.area; });
-	        fills = fills.map(function(a) { return a.entity; });
+	    if (!error) {
+	      context.enter(modeBrowse(context));
+	    }
 
-	        var strokes = fills.filter(function(area) { return area.type === 'way'; });
+	    return error;
+	  }
 
-	        var data = {
-	            clip: fills,
-	            shadow: strokes,
-	            stroke: strokes,
-	            fill: fills
-	        };
+	  mode.zoomToSelected = function () {
+	    if (!errorService) return;
+	    var error = errorService.getError(selectedErrorID);
 
-	        var clipPaths = context.surface().selectAll('defs').selectAll('.clipPath-osm')
-	           .filter(filter)
-	           .data(data.clip, osmEntity.key);
+	    if (error) {
+	      context.map().centerZoomEase(error.loc, 20);
+	    }
+	  };
 
-	        clipPaths.exit()
-	           .remove();
+	  mode.enter = function () {
+	    var error = checkSelectedID();
+	    if (!error) return;
+	    behaviors.forEach(context.install);
+	    keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+	    select(document).call(keybinding);
+	    selectError();
+	    var sidebar = context.ui().sidebar;
+	    sidebar.show(errorEditor.error(error));
+	    context.map().on('drawn.select-error', selectError); // class the error as selected, or return to browse mode if the error is gone
 
-	        var clipPathsEnter = clipPaths.enter()
-	           .append('clipPath')
-	           .attr('class', 'clipPath-osm')
-	           .attr('id', function(entity) { return 'ideditor-' + entity.id + '-clippath'; });
+	    function selectError(d3_event, drawn) {
+	      if (!checkSelectedID()) return;
+	      var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
 
-	        clipPathsEnter
-	           .append('path');
+	      if (selection.empty()) {
+	        // Return to browse mode if selected DOM elements have
+	        // disappeared because the user moved them out of view..
+	        var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
 
-	        clipPaths.merge(clipPathsEnter)
-	           .selectAll('path')
-	           .attr('d', path);
+	        if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	          context.enter(modeBrowse(context));
+	        }
+	      } else {
+	        selection.classed('selected', true);
+	        context.selectedErrorID(selectedErrorID);
+	      }
+	    }
 
+	    function esc() {
+	      if (context.container().select('.combobox').size()) return;
+	      context.enter(modeBrowse(context));
+	    }
+	  };
 
-	        var drawLayer = selection.selectAll('.layer-osm.areas');
-	        var touchLayer = selection.selectAll('.layer-touch.areas');
+	  mode.exit = function () {
+	    behaviors.forEach(context.uninstall);
+	    select(document).call(keybinding.unbind);
+	    context.surface().selectAll('.qaItem.selected').classed('selected hover', false);
+	    context.map().on('drawn.select-error', null);
+	    context.ui().sidebar.hide();
+	    context.selectedErrorID(null);
+	    context.features().forceVisible([]);
+	  };
 
-	        // Draw areas..
-	        var areagroup = drawLayer
-	            .selectAll('g.areagroup')
-	            .data(['fill', 'shadow', 'stroke']);
+	  return mode;
+	}
 
-	        areagroup = areagroup.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'areagroup area-' + d; })
-	            .merge(areagroup);
+	function behaviorSelect(context) {
+	  var _tolerancePx = 4; // see also behaviorDrag
 
-	        var paths = areagroup
-	            .selectAll('path')
-	            .filter(filter)
-	            .data(function(layer) { return data[layer]; }, osmEntity.key);
+	  var _lastMouseEvent = null;
+	  var _showMenu = false;
+	  var _downPointers = {};
+	  var _longPressTimeout = null;
+	  var _lastInteractionType = null; // the id of the down pointer that's enabling multiselection while down
 
-	        paths.exit()
-	            .remove();
+	  var _multiselectionPointerId = null; // use pointer events on supported platforms; fallback to mouse events
 
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	        var fillpaths = selection.selectAll('.area-fill path.area').nodes();
-	        var bisect = d3_bisector(function(node) { return -node.__data__.area(graph); }).left;
+	  function keydown(d3_event) {
+	    if (d3_event.keyCode === 32) {
+	      // don't react to spacebar events during text input
+	      var activeNode = document.activeElement;
+	      if (activeNode && new Set(['INPUT', 'TEXTAREA']).has(activeNode.nodeName)) return;
+	    }
 
-	        function sortedByArea(entity) {
-	            if (this._parent.__data__ === 'fill') {
-	                return fillpaths[bisect(fillpaths, -entity.area(graph))];
-	            }
-	        }
+	    if (d3_event.keyCode === 93 || // context menu key
+	    d3_event.keyCode === 32) {
+	      // spacebar
+	      d3_event.preventDefault();
+	    }
 
-	        paths = paths.enter()
-	            .insert('path', sortedByArea)
-	            .merge(paths)
-	            .each(function(entity) {
-	                var layer = this.parentNode.__data__;
-	                this.setAttribute('class', entity.type + ' area ' + layer + ' ' + entity.id);
+	    if (d3_event.repeat) return; // ignore repeated events for held keys
+	    // if any key is pressed the user is probably doing something other than long-pressing
 
-	                if (layer === 'fill') {
-	                    this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
-	                    this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
-	                }
-	            })
-	            .classed('added', function(d) {
-	                return !base.entities[d.id];
-	            })
-	            .classed('geometry-edited', function(d) {
-	                return graph.entities[d.id] &&
-	                    base.entities[d.id] &&
-	                    !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
-	            })
-	            .classed('retagged', function(d) {
-	                return graph.entities[d.id] &&
-	                    base.entities[d.id] &&
-	                    !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-	            })
-	            .call(svgTagClasses())
-	            .attr('d', path);
+	    cancelLongPress();
 
+	    if (d3_event.shiftKey) {
+	      context.surface().classed('behavior-multiselect', true);
+	    }
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, data.stroke, filter);
+	    if (d3_event.keyCode === 32) {
+	      // spacebar
+	      if (!_downPointers.spacebar && _lastMouseEvent) {
+	        cancelLongPress();
+	        _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
+	        _downPointers.spacebar = {
+	          firstEvent: _lastMouseEvent,
+	          lastEvent: _lastMouseEvent
+	        };
+	      }
 	    }
+	  }
 
-	    return drawAreas;
-	}
+	  function keyup(d3_event) {
+	    cancelLongPress();
 
-	//[4]   	NameStartChar	   ::=   	":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
-	//[4a]   	NameChar	   ::=   	NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
-	//[5]   	Name	   ::=   	NameStartChar (NameChar)*
-	var nameStartChar = /[A-Z_a-z\xC0-\xD6\xD8-\xF6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD]/;//\u10000-\uEFFFF
-	var nameChar = new RegExp("[\\-\\.0-9"+nameStartChar.source.slice(1,-1)+"\\u00B7\\u0300-\\u036F\\u203F-\\u2040]");
-	var tagNamePattern = new RegExp('^'+nameStartChar.source+nameChar.source+'*(?:\:'+nameStartChar.source+nameChar.source+'*)?$');
-	//var tagNamePattern = /^[a-zA-Z_][\w\-\.]*(?:\:[a-zA-Z_][\w\-\.]*)?$/
-	//var handlers = 'resolveEntity,getExternalSubset,characters,endDocument,endElement,endPrefixMapping,ignorableWhitespace,processingInstruction,setDocumentLocator,skippedEntity,startDocument,startElement,startPrefixMapping,notationDecl,unparsedEntityDecl,error,fatalError,warning,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,comment,endCDATA,endDTD,endEntity,startCDATA,startDTD,startEntity'.split(',')
+	    if (!d3_event.shiftKey) {
+	      context.surface().classed('behavior-multiselect', false);
+	    }
 
-	//S_TAG,	S_ATTR,	S_EQ,	S_ATTR_NOQUOT_VALUE
-	//S_ATTR_SPACE,	S_ATTR_END,	S_TAG_SPACE, S_TAG_CLOSE
-	var S_TAG = 0;//tag name offerring
-	var S_ATTR = 1;//attr name offerring 
-	var S_ATTR_SPACE=2;//attr name end and space offer
-	var S_EQ = 3;//=space?
-	var S_ATTR_NOQUOT_VALUE = 4;//attr value(no quot value only)
-	var S_ATTR_END = 5;//attr value end and no space(quot end)
-	var S_TAG_SPACE = 6;//(attr value end || tag end ) && (space offer)
-	var S_TAG_CLOSE = 7;//closed el<el />
+	    if (d3_event.keyCode === 93) {
+	      // context menu key
+	      d3_event.preventDefault();
+	      _lastInteractionType = 'menukey';
+	      contextmenu(d3_event);
+	    } else if (d3_event.keyCode === 32) {
+	      // spacebar
+	      var pointer = _downPointers.spacebar;
 
-	function XMLReader(){
-		
-	}
+	      if (pointer) {
+	        delete _downPointers.spacebar;
+	        if (pointer.done) return;
+	        d3_event.preventDefault();
+	        _lastInteractionType = 'spacebar';
+	        click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
+	      }
+	    }
+	  }
 
-	XMLReader.prototype = {
-		parse:function(source,defaultNSMap,entityMap){
-			var domBuilder = this.domBuilder;
-			domBuilder.startDocument();
-			_copy(defaultNSMap ,defaultNSMap = {});
-			parse(source,defaultNSMap,entityMap,
-					domBuilder,this.errorHandler);
-			domBuilder.endDocument();
-		}
-	};
-	function parse(source,defaultNSMapCopy,entityMap,domBuilder,errorHandler){
-		function fixedFromCharCode(code) {
-			// String.prototype.fromCharCode does not supports
-			// > 2 bytes unicode chars directly
-			if (code > 0xffff) {
-				code -= 0x10000;
-				var surrogate1 = 0xd800 + (code >> 10)
-					, surrogate2 = 0xdc00 + (code & 0x3ff);
-
-				return String.fromCharCode(surrogate1, surrogate2);
-			} else {
-				return String.fromCharCode(code);
-			}
-		}
-		function entityReplacer(a){
-			var k = a.slice(1,-1);
-			if(k in entityMap){
-				return entityMap[k]; 
-			}else if(k.charAt(0) === '#'){
-				return fixedFromCharCode(parseInt(k.substr(1).replace('x','0x')))
-			}else {
-				errorHandler.error('entity not found:'+a);
-				return a;
-			}
-		}
-		function appendText(end){//has some bugs
-			if(end>start){
-				var xt = source.substring(start,end).replace(/&#?\w+;/g,entityReplacer);
-				locator&&position(start);
-				domBuilder.characters(xt,0,end-start);
-				start = end;
-			}
-		}
-		function position(p,m){
-			while(p>=lineEnd && (m = linePattern.exec(source))){
-				lineStart = m.index;
-				lineEnd = lineStart + m[0].length;
-				locator.lineNumber++;
-				//console.log('line++:',locator,startPos,endPos)
-			}
-			locator.columnNumber = p-lineStart+1;
-		}
-		var lineStart = 0;
-		var lineEnd = 0;
-		var linePattern = /.*(?:\r\n?|\n)|.*$/g;
-		var locator = domBuilder.locator;
-		
-		var parseStack = [{currentNSMap:defaultNSMapCopy}];
-		var closeMap = {};
-		var start = 0;
-		while(true){
-			try{
-				var tagStart = source.indexOf('<',start);
-				if(tagStart<0){
-					if(!source.substr(start).match(/^\s*$/)){
-						var doc = domBuilder.doc;
-		    			var text = doc.createTextNode(source.substr(start));
-		    			doc.appendChild(text);
-		    			domBuilder.currentElement = text;
-					}
-					return;
-				}
-				if(tagStart>start){
-					appendText(tagStart);
-				}
-				switch(source.charAt(tagStart+1)){
-				case '/':
-					var end = source.indexOf('>',tagStart+3);
-					var tagName = source.substring(tagStart+2,end);
-					var config = parseStack.pop();
-					if(end<0){
-						
-		        		tagName = source.substring(tagStart+2).replace(/[\s<].*/,'');
-		        		//console.error('#@@@@@@'+tagName)
-		        		errorHandler.error("end tag name: "+tagName+' is not complete:'+config.tagName);
-		        		end = tagStart+1+tagName.length;
-		        	}else if(tagName.match(/\s</)){
-		        		tagName = tagName.replace(/[\s<].*/,'');
-		        		errorHandler.error("end tag name: "+tagName+' maybe not complete');
-		        		end = tagStart+1+tagName.length;
-					}
-					//console.error(parseStack.length,parseStack)
-					//console.error(config);
-					var localNSMap = config.localNSMap;
-					var endMatch = config.tagName == tagName;
-					var endIgnoreCaseMach = endMatch || config.tagName&&config.tagName.toLowerCase() == tagName.toLowerCase();
-			        if(endIgnoreCaseMach){
-			        	domBuilder.endElement(config.uri,config.localName,tagName);
-						if(localNSMap){
-							for(var prefix in localNSMap){
-								domBuilder.endPrefixMapping(prefix) ;
-							}
-						}
-						if(!endMatch){
-			            	errorHandler.fatalError("end tag name: "+tagName+' is not match the current start tagName:'+config.tagName );
-						}
-			        }else {
-			        	parseStack.push(config);
-			        }
-					
-					end++;
-					break;
-					// end elment
-				case '?':// <?...?>
-					locator&&position(tagStart);
-					end = parseInstruction(source,tagStart,domBuilder);
-					break;
-				case '!':// <!doctype,<![CDATA,<!--
-					locator&&position(tagStart);
-					end = parseDCC(source,tagStart,domBuilder,errorHandler);
-					break;
-				default:
-					locator&&position(tagStart);
-					var el = new ElementAttributes();
-					var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
-					//elStartEnd
-					var end = parseElementStartPart(source,tagStart,el,currentNSMap,entityReplacer,errorHandler);
-					var len = el.length;
-					
-					
-					if(!el.closed && fixSelfClosed(source,end,el.tagName,closeMap)){
-						el.closed = true;
-						if(!entityMap.nbsp){
-							errorHandler.warning('unclosed xml attribute');
-						}
-					}
-					if(locator && len){
-						var locator2 = copyLocator(locator,{});
-						//try{//attribute position fixed
-						for(var i = 0;i<len;i++){
-							var a = el[i];
-							position(a.offset);
-							a.locator = copyLocator(locator,{});
-						}
-						//}catch(e){console.error('@@@@@'+e)}
-						domBuilder.locator = locator2;
-						if(appendElement(el,domBuilder,currentNSMap)){
-							parseStack.push(el);
-						}
-						domBuilder.locator = locator;
-					}else {
-						if(appendElement(el,domBuilder,currentNSMap)){
-							parseStack.push(el);
-						}
-					}
-					
-					
-					
-					if(el.uri === 'http://www.w3.org/1999/xhtml' && !el.closed){
-						end = parseHtmlSpecialContent(source,end,el.tagName,entityReplacer,domBuilder);
-					}else {
-						end++;
-					}
-				}
-			}catch(e){
-				errorHandler.error('element parse error: '+e);
-				//errorHandler.error('element parse error: '+e);
-				end = -1;
-				//throw e;
-			}
-			if(end>start){
-				start = end;
-			}else {
-				//TODO: 这里有可能sax回退，有位置错误风险
-				appendText(Math.max(tagStart,start)+1);
-			}
-		}
-	}
-	function copyLocator(f,t){
-		t.lineNumber = f.lineNumber;
-		t.columnNumber = f.columnNumber;
-		return t;
-	}
+	  function pointerdown(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    cancelLongPress();
+	    if (d3_event.buttons && d3_event.buttons !== 1) return;
+	    context.ui().closeEditMenu();
+	    _longPressTimeout = window.setTimeout(didLongPress, 500, id, 'longdown-' + (d3_event.pointerType || 'mouse'));
+	    _downPointers[id] = {
+	      firstEvent: d3_event,
+	      lastEvent: d3_event
+	    };
+	  }
 
-	/**
-	 * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);
-	 * @return end of the elementStartPart(end of elementEndPart for selfClosed el)
-	 */
-	function parseElementStartPart(source,start,el,currentNSMap,entityReplacer,errorHandler){
-		var attrName;
-		var value;
-		var p = ++start;
-		var s = S_TAG;//status
-		while(true){
-			var c = source.charAt(p);
-			switch(c){
-			case '=':
-				if(s === S_ATTR){//attrName
-					attrName = source.slice(start,p);
-					s = S_EQ;
-				}else if(s === S_ATTR_SPACE){
-					s = S_EQ;
-				}else {
-					//fatalError: equal must after attrName or space after attrName
-					throw new Error('attribute equal must after attrName');
-				}
-				break;
-			case '\'':
-			case '"':
-				if(s === S_EQ || s === S_ATTR //|| s == S_ATTR_SPACE
-					){//equal
-					if(s === S_ATTR){
-						errorHandler.warning('attribute value must after "="');
-						attrName = source.slice(start,p);
-					}
-					start = p+1;
-					p = source.indexOf(c,start);
-					if(p>0){
-						value = source.slice(start,p).replace(/&#?\w+;/g,entityReplacer);
-						el.add(attrName,value,start-1);
-						s = S_ATTR_END;
-					}else {
-						//fatalError: no end quot match
-						throw new Error('attribute value no end \''+c+'\' match');
-					}
-				}else if(s == S_ATTR_NOQUOT_VALUE){
-					value = source.slice(start,p).replace(/&#?\w+;/g,entityReplacer);
-					//console.log(attrName,value,start,p)
-					el.add(attrName,value,start);
-					//console.dir(el)
-					errorHandler.warning('attribute "'+attrName+'" missed start quot('+c+')!!');
-					start = p+1;
-					s = S_ATTR_END;
-				}else {
-					//fatalError: no equal before
-					throw new Error('attribute value must after "="');
-				}
-				break;
-			case '/':
-				switch(s){
-				case S_TAG:
-					el.setTagName(source.slice(start,p));
-				case S_ATTR_END:
-				case S_TAG_SPACE:
-				case S_TAG_CLOSE:
-					s =S_TAG_CLOSE;
-					el.closed = true;
-				case S_ATTR_NOQUOT_VALUE:
-				case S_ATTR:
-				case S_ATTR_SPACE:
-					break;
-				//case S_EQ:
-				default:
-					throw new Error("attribute invalid close char('/')")
-				}
-				break;
-			case ''://end document
-				//throw new Error('unexpected end of input')
-				errorHandler.error('unexpected end of input');
-				if(s == S_TAG){
-					el.setTagName(source.slice(start,p));
-				}
-				return p;
-			case '>':
-				switch(s){
-				case S_TAG:
-					el.setTagName(source.slice(start,p));
-				case S_ATTR_END:
-				case S_TAG_SPACE:
-				case S_TAG_CLOSE:
-					break;//normal
-				case S_ATTR_NOQUOT_VALUE://Compatible state
-				case S_ATTR:
-					value = source.slice(start,p);
-					if(value.slice(-1) === '/'){
-						el.closed  = true;
-						value = value.slice(0,-1);
-					}
-				case S_ATTR_SPACE:
-					if(s === S_ATTR_SPACE){
-						value = attrName;
-					}
-					if(s == S_ATTR_NOQUOT_VALUE){
-						errorHandler.warning('attribute "'+value+'" missed quot(")!!');
-						el.add(attrName,value.replace(/&#?\w+;/g,entityReplacer),start);
-					}else {
-						if(currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !value.match(/^(?:disabled|checked|selected)$/i)){
-							errorHandler.warning('attribute "'+value+'" missed value!! "'+value+'" instead!!');
-						}
-						el.add(value,value,start);
-					}
-					break;
-				case S_EQ:
-					throw new Error('attribute value missed!!');
-				}
-	//			console.log(tagName,tagNamePattern,tagNamePattern.test(tagName))
-				return p;
-			/*xml space '\x20' | #x9 | #xD | #xA; */
-			case '\u0080':
-				c = ' ';
-			default:
-				if(c<= ' '){//space
-					switch(s){
-					case S_TAG:
-						el.setTagName(source.slice(start,p));//tagName
-						s = S_TAG_SPACE;
-						break;
-					case S_ATTR:
-						attrName = source.slice(start,p);
-						s = S_ATTR_SPACE;
-						break;
-					case S_ATTR_NOQUOT_VALUE:
-						var value = source.slice(start,p).replace(/&#?\w+;/g,entityReplacer);
-						errorHandler.warning('attribute "'+value+'" missed quot(")!!');
-						el.add(attrName,value,start);
-					case S_ATTR_END:
-						s = S_TAG_SPACE;
-						break;
-					//case S_TAG_SPACE:
-					//case S_EQ:
-					//case S_ATTR_SPACE:
-					//	void();break;
-					//case S_TAG_CLOSE:
-						//ignore warning
-					}
-				}else {//not space
-	//S_TAG,	S_ATTR,	S_EQ,	S_ATTR_NOQUOT_VALUE
-	//S_ATTR_SPACE,	S_ATTR_END,	S_TAG_SPACE, S_TAG_CLOSE
-					switch(s){
-					//case S_TAG:void();break;
-					//case S_ATTR:void();break;
-					//case S_ATTR_NOQUOT_VALUE:void();break;
-					case S_ATTR_SPACE:
-						var tagName =  el.tagName;
-						if(currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !attrName.match(/^(?:disabled|checked|selected)$/i)){
-							errorHandler.warning('attribute "'+attrName+'" missed value!! "'+attrName+'" instead2!!');
-						}
-						el.add(attrName,attrName,start);
-						start = p;
-						s = S_ATTR;
-						break;
-					case S_ATTR_END:
-						errorHandler.warning('attribute space is required"'+attrName+'"!!');
-					case S_TAG_SPACE:
-						s = S_ATTR;
-						start = p;
-						break;
-					case S_EQ:
-						s = S_ATTR_NOQUOT_VALUE;
-						start = p;
-						break;
-					case S_TAG_CLOSE:
-						throw new Error("elements closed character '/' and '>' must be connected to");
-					}
-				}
-			}//end outer switch
-			//console.log('p++',p)
-			p++;
-		}
-	}
-	/**
-	 * @return true if has new namespace define
-	 */
-	function appendElement(el,domBuilder,currentNSMap){
-		var tagName = el.tagName;
-		var localNSMap = null;
-		//var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
-		var i = el.length;
-		while(i--){
-			var a = el[i];
-			var qName = a.qName;
-			var value = a.value;
-			var nsp = qName.indexOf(':');
-			if(nsp>0){
-				var prefix = a.prefix = qName.slice(0,nsp);
-				var localName = qName.slice(nsp+1);
-				var nsPrefix = prefix === 'xmlns' && localName;
-			}else {
-				localName = qName;
-				prefix = null;
-				nsPrefix = qName === 'xmlns' && '';
-			}
-			//can not set prefix,because prefix !== ''
-			a.localName = localName ;
-			//prefix == null for no ns prefix attribute 
-			if(nsPrefix !== false){//hack!!
-				if(localNSMap == null){
-					localNSMap = {};
-					//console.log(currentNSMap,0)
-					_copy(currentNSMap,currentNSMap={});
-					//console.log(currentNSMap,1)
-				}
-				currentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;
-				a.uri = 'http://www.w3.org/2000/xmlns/';
-				domBuilder.startPrefixMapping(nsPrefix, value); 
-			}
-		}
-		var i = el.length;
-		while(i--){
-			a = el[i];
-			var prefix = a.prefix;
-			if(prefix){//no prefix attribute has no namespace
-				if(prefix === 'xml'){
-					a.uri = 'http://www.w3.org/XML/1998/namespace';
-				}if(prefix !== 'xmlns'){
-					a.uri = currentNSMap[prefix || ''];
-					
-					//{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}
-				}
-			}
-		}
-		var nsp = tagName.indexOf(':');
-		if(nsp>0){
-			prefix = el.prefix = tagName.slice(0,nsp);
-			localName = el.localName = tagName.slice(nsp+1);
-		}else {
-			prefix = null;//important!!
-			localName = el.localName = tagName;
-		}
-		//no prefix element has default namespace
-		var ns = el.uri = currentNSMap[prefix || ''];
-		domBuilder.startElement(ns,localName,tagName,el);
-		//endPrefixMapping and startPrefixMapping have not any help for dom builder
-		//localNSMap = null
-		if(el.closed){
-			domBuilder.endElement(ns,localName,tagName);
-			if(localNSMap){
-				for(prefix in localNSMap){
-					domBuilder.endPrefixMapping(prefix); 
-				}
-			}
-		}else {
-			el.currentNSMap = currentNSMap;
-			el.localNSMap = localNSMap;
-			//parseStack.push(el);
-			return true;
-		}
-	}
-	function parseHtmlSpecialContent(source,elStartEnd,tagName,entityReplacer,domBuilder){
-		if(/^(?:script|textarea)$/i.test(tagName)){
-			var elEndStart =  source.indexOf('</'+tagName+'>',elStartEnd);
-			var text = source.substring(elStartEnd+1,elEndStart);
-			if(/[&<]/.test(text)){
-				if(/^script$/i.test(tagName)){
-					//if(!/\]\]>/.test(text)){
-						//lexHandler.startCDATA();
-						domBuilder.characters(text,0,text.length);
-						//lexHandler.endCDATA();
-						return elEndStart;
-					//}
-				}//}else{//text area
-					text = text.replace(/&#?\w+;/g,entityReplacer);
-					domBuilder.characters(text,0,text.length);
-					return elEndStart;
-				//}
-				
-			}
-		}
-		return elStartEnd+1;
-	}
-	function fixSelfClosed(source,elStartEnd,tagName,closeMap){
-		//if(tagName in closeMap){
-		var pos = closeMap[tagName];
-		if(pos == null){
-			//console.log(tagName)
-			pos =  source.lastIndexOf('</'+tagName+'>');
-			if(pos<elStartEnd){//忘记闭合
-				pos = source.lastIndexOf('</'+tagName);
-			}
-			closeMap[tagName] =pos;
-		}
-		return pos<elStartEnd;
-		//} 
-	}
-	function _copy(source,target){
-		for(var n in source){target[n] = source[n];}
-	}
-	function parseDCC(source,start,domBuilder,errorHandler){//sure start with '<!'
-		var next= source.charAt(start+2);
-		switch(next){
-		case '-':
-			if(source.charAt(start + 3) === '-'){
-				var end = source.indexOf('-->',start+4);
-				//append comment source.substring(4,end)//<!--
-				if(end>start){
-					domBuilder.comment(source,start+4,end-start-4);
-					return end+3;
-				}else {
-					errorHandler.error("Unclosed comment");
-					return -1;
-				}
-			}else {
-				//error
-				return -1;
-			}
-		default:
-			if(source.substr(start+3,6) == 'CDATA['){
-				var end = source.indexOf(']]>',start+9);
-				domBuilder.startCDATA();
-				domBuilder.characters(source,start+9,end-start-9);
-				domBuilder.endCDATA(); 
-				return end+3;
-			}
-			//<!DOCTYPE
-			//startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId) 
-			var matchs = split(source,start);
-			var len = matchs.length;
-			if(len>1 && /!doctype/i.test(matchs[0][0])){
-				var name = matchs[1][0];
-				var pubid = len>3 && /^public$/i.test(matchs[2][0]) && matchs[3][0];
-				var sysid = len>4 && matchs[4][0];
-				var lastMatch = matchs[len-1];
-				domBuilder.startDTD(name,pubid && pubid.replace(/^(['"])(.*?)\1$/,'$2'),
-						sysid && sysid.replace(/^(['"])(.*?)\1$/,'$2'));
-				domBuilder.endDTD();
-				
-				return lastMatch.index+lastMatch[0].length
-			}
-		}
-		return -1;
-	}
+	  function didLongPress(id, interactionType) {
+	    var pointer = _downPointers[id];
+	    if (!pointer) return;
 
+	    for (var i in _downPointers) {
+	      // don't allow this or any currently down pointer to trigger another click
+	      _downPointers[i].done = true;
+	    } // treat long presses like right-clicks
 
 
-	function parseInstruction(source,start,domBuilder){
-		var end = source.indexOf('?>',start);
-		if(end){
-			var match = source.substring(start,end).match(/^<\?(\S*)\s*([\s\S]*?)\s*$/);
-			if(match){
-				var len = match[0].length;
-				domBuilder.processingInstruction(match[1], match[2]) ;
-				return end+2;
-			}else {//error
-				return -1;
-			}
-		}
-		return -1;
-	}
+	    _longPressTimeout = null;
+	    _lastInteractionType = interactionType;
+	    _showMenu = true;
+	    click(pointer.firstEvent, pointer.lastEvent, id);
+	  }
 
-	/**
-	 * @param source
-	 */
-	function ElementAttributes(source){
-		
-	}
-	ElementAttributes.prototype = {
-		setTagName:function(tagName){
-			if(!tagNamePattern.test(tagName)){
-				throw new Error('invalid tagName:'+tagName)
-			}
-			this.tagName = tagName;
-		},
-		add:function(qName,value,offset){
-			if(!tagNamePattern.test(qName)){
-				throw new Error('invalid attribute:'+qName)
-			}
-			this[this.length++] = {qName:qName,value:value,offset:offset};
-		},
-		length:0,
-		getLocalName:function(i){return this[i].localName},
-		getLocator:function(i){return this[i].locator},
-		getQName:function(i){return this[i].qName},
-		getURI:function(i){return this[i].uri},
-		getValue:function(i){return this[i].value}
-	//	,getIndex:function(uri, localName)){
-	//		if(localName){
-	//			
-	//		}else{
-	//			var qName = uri
-	//		}
-	//	},
-	//	getValue:function(){return this.getValue(this.getIndex.apply(this,arguments))},
-	//	getType:function(uri,localName){}
-	//	getType:function(i){},
-	};
+	  function pointermove(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
 
+	    if (_downPointers[id]) {
+	      _downPointers[id].lastEvent = d3_event;
+	    }
 
+	    if (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
+	      _lastMouseEvent = d3_event;
 
+	      if (_downPointers.spacebar) {
+	        _downPointers.spacebar.lastEvent = d3_event;
+	      }
+	    }
+	  }
 
-	function _set_proto_(thiz,parent){
-		thiz.__proto__ = parent;
-		return thiz;
-	}
-	if(!(_set_proto_({},_set_proto_.prototype) instanceof _set_proto_)){
-		_set_proto_ = function(thiz,parent){
-			function p(){}		p.prototype = parent;
-			p = new p();
-			for(parent in thiz){
-				p[parent] = thiz[parent];
-			}
-			return p;
-		};
-	}
+	  function pointerup(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    var pointer = _downPointers[id];
+	    if (!pointer) return;
+	    delete _downPointers[id];
 
-	function split(source,start){
-		var match;
-		var buf = [];
-		var reg = /'[^']+'|"[^"]+"|[^\s<>\/=]+=?|(\/?\s*>|<)/g;
-		reg.lastIndex = start;
-		reg.exec(source);//skip <
-		while(match = reg.exec(source)){
-			buf.push(match);
-			if(match[1]){ return buf; }
-		}
-	}
+	    if (_multiselectionPointerId === id) {
+	      _multiselectionPointerId = null;
+	    }
 
-	var XMLReader_1 = XMLReader;
+	    if (pointer.done) return;
+	    click(pointer.firstEvent, d3_event, id);
+	  }
 
-	var sax = {
-		XMLReader: XMLReader_1
-	};
+	  function pointercancel(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    if (!_downPointers[id]) return;
+	    delete _downPointers[id];
 
-	/*
-	 * DOM Level 2
-	 * Object DOMException
-	 * @see http://www.w3.org/TR/REC-DOM-Level-1/ecma-script-language-binding.html
-	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/ecma-script-binding.html
-	 */
+	    if (_multiselectionPointerId === id) {
+	      _multiselectionPointerId = null;
+	    }
+	  }
 
-	function copy$2(src,dest){
-		for(var p in src){
-			dest[p] = src[p];
-		}
-	}
-	/**
-	^\w+\.prototype\.([_\w]+)\s*=\s*((?:.*\{\s*?[\r\n][\s\S]*?^})|\S.*?(?=[;\r\n]));?
-	^\w+\.prototype\.([_\w]+)\s*=\s*(\S.*?(?=[;\r\n]));?
-	 */
-	function _extends(Class,Super){
-		var pt = Class.prototype;
-		if(Object.create){
-			var ppt = Object.create(Super.prototype);
-			pt.__proto__ = ppt;
-		}
-		if(!(pt instanceof Super)){
-			function t(){}		t.prototype = Super.prototype;
-			t = new t();
-			copy$2(pt,t);
-			Class.prototype = pt = t;
-		}
-		if(pt.constructor != Class){
-			if(typeof Class != 'function'){
-				console.error("unknow Class:"+Class);
-			}
-			pt.constructor = Class;
-		}
-	}
-	var htmlns = 'http://www.w3.org/1999/xhtml' ;
-	// Node Types
-	var NodeType = {};
-	var ELEMENT_NODE                = NodeType.ELEMENT_NODE                = 1;
-	var ATTRIBUTE_NODE              = NodeType.ATTRIBUTE_NODE              = 2;
-	var TEXT_NODE                   = NodeType.TEXT_NODE                   = 3;
-	var CDATA_SECTION_NODE          = NodeType.CDATA_SECTION_NODE          = 4;
-	var ENTITY_REFERENCE_NODE       = NodeType.ENTITY_REFERENCE_NODE       = 5;
-	var ENTITY_NODE                 = NodeType.ENTITY_NODE                 = 6;
-	var PROCESSING_INSTRUCTION_NODE = NodeType.PROCESSING_INSTRUCTION_NODE = 7;
-	var COMMENT_NODE                = NodeType.COMMENT_NODE                = 8;
-	var DOCUMENT_NODE               = NodeType.DOCUMENT_NODE               = 9;
-	var DOCUMENT_TYPE_NODE          = NodeType.DOCUMENT_TYPE_NODE          = 10;
-	var DOCUMENT_FRAGMENT_NODE      = NodeType.DOCUMENT_FRAGMENT_NODE      = 11;
-	var NOTATION_NODE               = NodeType.NOTATION_NODE               = 12;
+	  function contextmenu(d3_event) {
+	    d3_event.preventDefault();
 
-	// ExceptionCode
-	var ExceptionCode = {};
-	var ExceptionMessage = {};
-	var INDEX_SIZE_ERR              = ExceptionCode.INDEX_SIZE_ERR              = ((ExceptionMessage[1]="Index size error"),1);
-	var DOMSTRING_SIZE_ERR          = ExceptionCode.DOMSTRING_SIZE_ERR          = ((ExceptionMessage[2]="DOMString size error"),2);
-	var HIERARCHY_REQUEST_ERR       = ExceptionCode.HIERARCHY_REQUEST_ERR       = ((ExceptionMessage[3]="Hierarchy request error"),3);
-	var WRONG_DOCUMENT_ERR          = ExceptionCode.WRONG_DOCUMENT_ERR          = ((ExceptionMessage[4]="Wrong document"),4);
-	var INVALID_CHARACTER_ERR       = ExceptionCode.INVALID_CHARACTER_ERR       = ((ExceptionMessage[5]="Invalid character"),5);
-	var NO_DATA_ALLOWED_ERR         = ExceptionCode.NO_DATA_ALLOWED_ERR         = ((ExceptionMessage[6]="No data allowed"),6);
-	var NO_MODIFICATION_ALLOWED_ERR = ExceptionCode.NO_MODIFICATION_ALLOWED_ERR = ((ExceptionMessage[7]="No modification allowed"),7);
-	var NOT_FOUND_ERR               = ExceptionCode.NOT_FOUND_ERR               = ((ExceptionMessage[8]="Not found"),8);
-	var NOT_SUPPORTED_ERR           = ExceptionCode.NOT_SUPPORTED_ERR           = ((ExceptionMessage[9]="Not supported"),9);
-	var INUSE_ATTRIBUTE_ERR         = ExceptionCode.INUSE_ATTRIBUTE_ERR         = ((ExceptionMessage[10]="Attribute in use"),10);
-	//level2
-	var INVALID_STATE_ERR        	= ExceptionCode.INVALID_STATE_ERR        	= ((ExceptionMessage[11]="Invalid state"),11);
-	var SYNTAX_ERR               	= ExceptionCode.SYNTAX_ERR               	= ((ExceptionMessage[12]="Syntax error"),12);
-	var INVALID_MODIFICATION_ERR 	= ExceptionCode.INVALID_MODIFICATION_ERR 	= ((ExceptionMessage[13]="Invalid modification"),13);
-	var NAMESPACE_ERR            	= ExceptionCode.NAMESPACE_ERR           	= ((ExceptionMessage[14]="Invalid namespace"),14);
-	var INVALID_ACCESS_ERR       	= ExceptionCode.INVALID_ACCESS_ERR      	= ((ExceptionMessage[15]="Invalid access"),15);
+	    if (!+d3_event.clientX && !+d3_event.clientY) {
+	      if (_lastMouseEvent) {
+	        d3_event.sourceEvent = _lastMouseEvent;
+	      } else {
+	        return;
+	      }
+	    } else {
+	      _lastMouseEvent = d3_event;
+	      _lastInteractionType = 'rightclick';
+	    }
 
+	    _showMenu = true;
+	    click(d3_event, d3_event);
+	  }
 
-	function DOMException$2(code, message) {
-		if(message instanceof Error){
-			var error = message;
-		}else {
-			error = this;
-			Error.call(this, ExceptionMessage[code]);
-			this.message = ExceptionMessage[code];
-			if(Error.captureStackTrace) { Error.captureStackTrace(this, DOMException$2); }
-		}
-		error.code = code;
-		if(message) { this.message = this.message + ": " + message; }
-		return error;
-	}DOMException$2.prototype = Error.prototype;
-	copy$2(ExceptionCode,DOMException$2);
-	/**
-	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-536297177
-	 * The NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. NodeList objects in the DOM are live.
-	 * The items in the NodeList are accessible via an integral index, starting from 0.
-	 */
-	function NodeList() {
-	}NodeList.prototype = {
-		/**
-		 * The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.
-		 * @standard level1
-		 */
-		length:0, 
-		/**
-		 * Returns the indexth item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.
-		 * @standard level1
-		 * @param index  unsigned long 
-		 *   Index into the collection.
-		 * @return Node
-		 * 	The node at the indexth position in the NodeList, or null if that is not a valid index. 
-		 */
-		item: function(index) {
-			return this[index] || null;
-		},
-		toString:function(isHTML,nodeFilter){
-			for(var buf = [], i = 0;i<this.length;i++){
-				serializeToString(this[i],buf,isHTML,nodeFilter);
-			}
-			return buf.join('');
-		}
-	};
-	function LiveNodeList(node,refresh){
-		this._node = node;
-		this._refresh = refresh;
-		_updateLiveList(this);
-	}
-	function _updateLiveList(list){
-		var inc = list._node._inc || list._node.ownerDocument._inc;
-		if(list._inc != inc){
-			var ls = list._refresh(list._node);
-			//console.log(ls.length)
-			__set__(list,'length',ls.length);
-			copy$2(ls,list);
-			list._inc = inc;
-		}
-	}
-	LiveNodeList.prototype.item = function(i){
-		_updateLiveList(this);
-		return this[i];
-	};
+	  function click(firstEvent, lastEvent, pointerId) {
+	    cancelLongPress();
+	    var mapNode = context.container().select('.main-map').node(); // Use the `main-map` coordinate system since the surface and supersurface
+	    // are transformed when drag-panning.
 
-	_extends(LiveNodeList,NodeList);
-	/**
-	 * 
-	 * Objects implementing the NamedNodeMap interface are used to represent collections of nodes that can be accessed by name. Note that NamedNodeMap does not inherit from NodeList; NamedNodeMaps are not maintained in any particular order. Objects contained in an object implementing NamedNodeMap may also be accessed by an ordinal index, but this is simply to allow convenient enumeration of the contents of a NamedNodeMap, and does not imply that the DOM specifies an order to these Nodes.
-	 * NamedNodeMap objects in the DOM are live.
-	 * used for attributes or DocumentType entities 
-	 */
-	function NamedNodeMap() {
-	}
-	function _findNodeIndex(list,node){
-		var i = list.length;
-		while(i--){
-			if(list[i] === node){return i}
-		}
-	}
-
-	function _addNamedNode(el,list,newAttr,oldAttr){
-		if(oldAttr){
-			list[_findNodeIndex(list,oldAttr)] = newAttr;
-		}else {
-			list[list.length++] = newAttr;
-		}
-		if(el){
-			newAttr.ownerElement = el;
-			var doc = el.ownerDocument;
-			if(doc){
-				oldAttr && _onRemoveAttribute(doc,el,oldAttr);
-				_onAddAttribute(doc,el,newAttr);
-			}
-		}
-	}
-	function _removeNamedNode(el,list,attr){
-		//console.log('remove attr:'+attr)
-		var i = _findNodeIndex(list,attr);
-		if(i>=0){
-			var lastIndex = list.length-1;
-			while(i<lastIndex){
-				list[i] = list[++i];
-			}
-			list.length = lastIndex;
-			if(el){
-				var doc = el.ownerDocument;
-				if(doc){
-					_onRemoveAttribute(doc,el,attr);
-					attr.ownerElement = null;
-				}
-			}
-		}else {
-			throw DOMException$2(NOT_FOUND_ERR,new Error(el.tagName+'@'+attr))
-		}
-	}
-	NamedNodeMap.prototype = {
-		length:0,
-		item:NodeList.prototype.item,
-		getNamedItem: function(key) {
-	//		if(key.indexOf(':')>0 || key == 'xmlns'){
-	//			return null;
-	//		}
-			//console.log()
-			var i = this.length;
-			while(i--){
-				var attr = this[i];
-				//console.log(attr.nodeName,key)
-				if(attr.nodeName == key){
-					return attr;
-				}
-			}
-		},
-		setNamedItem: function(attr) {
-			var el = attr.ownerElement;
-			if(el && el!=this._ownerElement){
-				throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
-			}
-			var oldAttr = this.getNamedItem(attr.nodeName);
-			_addNamedNode(this._ownerElement,this,attr,oldAttr);
-			return oldAttr;
-		},
-		/* returns Node */
-		setNamedItemNS: function(attr) {// raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR
-			var el = attr.ownerElement, oldAttr;
-			if(el && el!=this._ownerElement){
-				throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
-			}
-			oldAttr = this.getNamedItemNS(attr.namespaceURI,attr.localName);
-			_addNamedNode(this._ownerElement,this,attr,oldAttr);
-			return oldAttr;
-		},
-
-		/* returns Node */
-		removeNamedItem: function(key) {
-			var attr = this.getNamedItem(key);
-			_removeNamedNode(this._ownerElement,this,attr);
-			return attr;
-			
-			
-		},// raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR
-		
-		//for level2
-		removeNamedItemNS:function(namespaceURI,localName){
-			var attr = this.getNamedItemNS(namespaceURI,localName);
-			_removeNamedNode(this._ownerElement,this,attr);
-			return attr;
-		},
-		getNamedItemNS: function(namespaceURI, localName) {
-			var i = this.length;
-			while(i--){
-				var node = this[i];
-				if(node.localName == localName && node.namespaceURI == namespaceURI){
-					return node;
-				}
-			}
-			return null;
-		}
-	};
-	/**
-	 * @see http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490
-	 */
-	function DOMImplementation(/* Object */ features) {
-		this._features = {};
-		if (features) {
-			for (var feature in features) {
-				 this._features = features[feature];
-			}
-		}
-	}
-	DOMImplementation.prototype = {
-		hasFeature: function(/* string */ feature, /* string */ version) {
-			var versions = this._features[feature.toLowerCase()];
-			if (versions && (!version || version in versions)) {
-				return true;
-			} else {
-				return false;
-			}
-		},
-		// Introduced in DOM Level 2:
-		createDocument:function(namespaceURI,  qualifiedName, doctype){// raises:INVALID_CHARACTER_ERR,NAMESPACE_ERR,WRONG_DOCUMENT_ERR
-			var doc = new Document();
-			doc.implementation = this;
-			doc.childNodes = new NodeList();
-			doc.doctype = doctype;
-			if(doctype){
-				doc.appendChild(doctype);
-			}
-			if(qualifiedName){
-				var root = doc.createElementNS(namespaceURI,qualifiedName);
-				doc.appendChild(root);
-			}
-			return doc;
-		},
-		// Introduced in DOM Level 2:
-		createDocumentType:function(qualifiedName, publicId, systemId){// raises:INVALID_CHARACTER_ERR,NAMESPACE_ERR
-			var node = new DocumentType();
-			node.name = qualifiedName;
-			node.nodeName = qualifiedName;
-			node.publicId = publicId;
-			node.systemId = systemId;
-			// Introduced in DOM Level 2:
-			//readonly attribute DOMString        internalSubset;
-			
-			//TODO:..
-			//  readonly attribute NamedNodeMap     entities;
-			//  readonly attribute NamedNodeMap     notations;
-			return node;
-		}
-	};
+	    var pointGetter = utilFastMouse(mapNode);
+	    var p1 = pointGetter(firstEvent);
+	    var p2 = pointGetter(lastEvent);
+	    var dist = geoVecLength(p1, p2);
 
+	    if (dist > _tolerancePx || !mapContains(lastEvent)) {
+	      resetProperties();
+	      return;
+	    }
 
-	/**
-	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
-	 */
+	    var targetDatum = lastEvent.target.__data__;
+	    var multiselectEntityId;
 
-	function Node() {
-	}
-	Node.prototype = {
-		firstChild : null,
-		lastChild : null,
-		previousSibling : null,
-		nextSibling : null,
-		attributes : null,
-		parentNode : null,
-		childNodes : null,
-		ownerDocument : null,
-		nodeValue : null,
-		namespaceURI : null,
-		prefix : null,
-		localName : null,
-		// Modified in DOM Level 2:
-		insertBefore:function(newChild, refChild){//raises 
-			return _insertBefore(this,newChild,refChild);
-		},
-		replaceChild:function(newChild, oldChild){//raises 
-			this.insertBefore(newChild,oldChild);
-			if(oldChild){
-				this.removeChild(oldChild);
-			}
-		},
-		removeChild:function(oldChild){
-			return _removeChild(this,oldChild);
-		},
-		appendChild:function(newChild){
-			return this.insertBefore(newChild,null);
-		},
-		hasChildNodes:function(){
-			return this.firstChild != null;
-		},
-		cloneNode:function(deep){
-			return cloneNode(this.ownerDocument||this,this,deep);
-		},
-		// Modified in DOM Level 2:
-		normalize:function(){
-			var child = this.firstChild;
-			while(child){
-				var next = child.nextSibling;
-				if(next && next.nodeType == TEXT_NODE && child.nodeType == TEXT_NODE){
-					this.removeChild(next);
-					child.appendData(next.data);
-				}else {
-					child.normalize();
-					child = next;
-				}
-			}
-		},
-	  	// Introduced in DOM Level 2:
-		isSupported:function(feature, version){
-			return this.ownerDocument.implementation.hasFeature(feature,version);
-		},
-	    // Introduced in DOM Level 2:
-	    hasAttributes:function(){
-	    	return this.attributes.length>0;
-	    },
-	    lookupPrefix:function(namespaceURI){
-	    	var el = this;
-	    	while(el){
-	    		var map = el._nsMap;
-	    		//console.dir(map)
-	    		if(map){
-	    			for(var n in map){
-	    				if(map[n] == namespaceURI){
-	    					return n;
-	    				}
-	    			}
-	    		}
-	    		el = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;
-	    	}
-	    	return null;
-	    },
-	    // Introduced in DOM Level 3:
-	    lookupNamespaceURI:function(prefix){
-	    	var el = this;
-	    	while(el){
-	    		var map = el._nsMap;
-	    		//console.dir(map)
-	    		if(map){
-	    			if(prefix in map){
-	    				return map[prefix] ;
-	    			}
-	    		}
-	    		el = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;
-	    	}
-	    	return null;
-	    },
-	    // Introduced in DOM Level 3:
-	    isDefaultNamespace:function(namespaceURI){
-	    	var prefix = this.lookupPrefix(namespaceURI);
-	    	return prefix == null;
-	    }
-	};
+	    if (!_multiselectionPointerId) {
+	      // If a different pointer than the one triggering this click is down on a
+	      // feature, treat this and all future clicks as multiselection until that
+	      // pointer is raised.
+	      var selectPointerInfo = pointerDownOnSelection(pointerId);
 
+	      if (selectPointerInfo) {
+	        _multiselectionPointerId = selectPointerInfo.pointerId; // if the other feature isn't selected yet, make sure we select it
 
-	function _xmlEncoder(c){
-		return c == '<' && '&lt;' ||
-	         c == '>' && '&gt;' ||
-	         c == '&' && '&amp;' ||
-	         c == '"' && '&quot;' ||
-	         '&#'+c.charCodeAt()+';'
-	}
+	        multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
+	        _downPointers[selectPointerInfo.pointerId].done = true;
+	      }
+	    } // support multiselect if data is already selected
 
 
-	copy$2(NodeType,Node);
-	copy$2(NodeType,Node.prototype);
+	    var isMultiselect = context.mode().id === 'select' && ( // and shift key is down
+	    lastEvent && lastEvent.shiftKey || // or we're lasso-selecting
+	    context.surface().select('.lasso').node() || // or a pointer is down over a selected feature
+	    _multiselectionPointerId && !multiselectEntityId);
 
-	/**
-	 * @param callback return true for continue,false for break
-	 * @return boolean true: break visit;
-	 */
-	function _visitNode(node,callback){
-		if(callback(node)){
-			return true;
-		}
-		if(node = node.firstChild){
-			do{
-				if(_visitNode(node,callback)){return true}
-	        }while(node=node.nextSibling)
-	    }
-	}
-
-
-
-	function Document(){
-	}
-	function _onAddAttribute(doc,el,newAttr){
-		doc && doc._inc++;
-		var ns = newAttr.namespaceURI ;
-		if(ns == 'http://www.w3.org/2000/xmlns/'){
-			//update namespace
-			el._nsMap[newAttr.prefix?newAttr.localName:''] = newAttr.value;
-		}
-	}
-	function _onRemoveAttribute(doc,el,newAttr,remove){
-		doc && doc._inc++;
-		var ns = newAttr.namespaceURI ;
-		if(ns == 'http://www.w3.org/2000/xmlns/'){
-			//update namespace
-			delete el._nsMap[newAttr.prefix?newAttr.localName:''];
-		}
-	}
-	function _onUpdateChild(doc,el,newChild){
-		if(doc && doc._inc){
-			doc._inc++;
-			//update childNodes
-			var cs = el.childNodes;
-			if(newChild){
-				cs[cs.length++] = newChild;
-			}else {
-				//console.log(1)
-				var child = el.firstChild;
-				var i = 0;
-				while(child){
-					cs[i++] = child;
-					child =child.nextSibling;
-				}
-				cs.length = i;
-			}
-		}
-	}
+	    processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
 
-	/**
-	 * attributes;
-	 * children;
-	 * 
-	 * writeable properties:
-	 * nodeValue,Attr:value,CharacterData:data
-	 * prefix
-	 */
-	function _removeChild(parentNode,child){
-		var previous = child.previousSibling;
-		var next = child.nextSibling;
-		if(previous){
-			previous.nextSibling = next;
-		}else {
-			parentNode.firstChild = next;
-		}
-		if(next){
-			next.previousSibling = previous;
-		}else {
-			parentNode.lastChild = previous;
-		}
-		_onUpdateChild(parentNode.ownerDocument,parentNode);
-		return child;
-	}
-	/**
-	 * preformance key(refChild == null)
-	 */
-	function _insertBefore(parentNode,newChild,nextChild){
-		var cp = newChild.parentNode;
-		if(cp){
-			cp.removeChild(newChild);//remove and update
-		}
-		if(newChild.nodeType === DOCUMENT_FRAGMENT_NODE){
-			var newFirst = newChild.firstChild;
-			if (newFirst == null) {
-				return newChild;
-			}
-			var newLast = newChild.lastChild;
-		}else {
-			newFirst = newLast = newChild;
-		}
-		var pre = nextChild ? nextChild.previousSibling : parentNode.lastChild;
-
-		newFirst.previousSibling = pre;
-		newLast.nextSibling = nextChild;
-		
-		
-		if(pre){
-			pre.nextSibling = newFirst;
-		}else {
-			parentNode.firstChild = newFirst;
-		}
-		if(nextChild == null){
-			parentNode.lastChild = newLast;
-		}else {
-			nextChild.previousSibling = newLast;
-		}
-		do{
-			newFirst.parentNode = parentNode;
-		}while(newFirst !== newLast && (newFirst= newFirst.nextSibling))
-		_onUpdateChild(parentNode.ownerDocument||parentNode,parentNode);
-		//console.log(parentNode.lastChild.nextSibling == null)
-		if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
-			newChild.firstChild = newChild.lastChild = null;
-		}
-		return newChild;
-	}
-	function _appendSingleChild(parentNode,newChild){
-		var cp = newChild.parentNode;
-		if(cp){
-			var pre = parentNode.lastChild;
-			cp.removeChild(newChild);//remove and update
-			var pre = parentNode.lastChild;
-		}
-		var pre = parentNode.lastChild;
-		newChild.parentNode = parentNode;
-		newChild.previousSibling = pre;
-		newChild.nextSibling = null;
-		if(pre){
-			pre.nextSibling = newChild;
-		}else {
-			parentNode.firstChild = newChild;
-		}
-		parentNode.lastChild = newChild;
-		_onUpdateChild(parentNode.ownerDocument,parentNode,newChild);
-		return newChild;
-		//console.log("__aa",parentNode.lastChild.nextSibling == null)
-	}
-	Document.prototype = {
-		//implementation : null,
-		nodeName :  '#document',
-		nodeType :  DOCUMENT_NODE,
-		doctype :  null,
-		documentElement :  null,
-		_inc : 1,
-		
-		insertBefore :  function(newChild, refChild){//raises 
-			if(newChild.nodeType == DOCUMENT_FRAGMENT_NODE){
-				var child = newChild.firstChild;
-				while(child){
-					var next = child.nextSibling;
-					this.insertBefore(child,refChild);
-					child = next;
-				}
-				return newChild;
-			}
-			if(this.documentElement == null && newChild.nodeType == ELEMENT_NODE){
-				this.documentElement = newChild;
-			}
-			
-			return _insertBefore(this,newChild,refChild),(newChild.ownerDocument = this),newChild;
-		},
-		removeChild :  function(oldChild){
-			if(this.documentElement == oldChild){
-				this.documentElement = null;
-			}
-			return _removeChild(this,oldChild);
-		},
-		// Introduced in DOM Level 2:
-		importNode : function(importedNode,deep){
-			return importNode(this,importedNode,deep);
-		},
-		// Introduced in DOM Level 2:
-		getElementById :	function(id){
-			var rtv = null;
-			_visitNode(this.documentElement,function(node){
-				if(node.nodeType == ELEMENT_NODE){
-					if(node.getAttribute('id') == id){
-						rtv = node;
-						return true;
-					}
-				}
-			});
-			return rtv;
-		},
-		
-		//document factory method:
-		createElement :	function(tagName){
-			var node = new Element();
-			node.ownerDocument = this;
-			node.nodeName = tagName;
-			node.tagName = tagName;
-			node.childNodes = new NodeList();
-			var attrs	= node.attributes = new NamedNodeMap();
-			attrs._ownerElement = node;
-			return node;
-		},
-		createDocumentFragment :	function(){
-			var node = new DocumentFragment();
-			node.ownerDocument = this;
-			node.childNodes = new NodeList();
-			return node;
-		},
-		createTextNode :	function(data){
-			var node = new Text();
-			node.ownerDocument = this;
-			node.appendData(data);
-			return node;
-		},
-		createComment :	function(data){
-			var node = new Comment();
-			node.ownerDocument = this;
-			node.appendData(data);
-			return node;
-		},
-		createCDATASection :	function(data){
-			var node = new CDATASection();
-			node.ownerDocument = this;
-			node.appendData(data);
-			return node;
-		},
-		createProcessingInstruction :	function(target,data){
-			var node = new ProcessingInstruction();
-			node.ownerDocument = this;
-			node.tagName = node.target = target;
-			node.nodeValue= node.data = data;
-			return node;
-		},
-		createAttribute :	function(name){
-			var node = new Attr();
-			node.ownerDocument	= this;
-			node.name = name;
-			node.nodeName	= name;
-			node.localName = name;
-			node.specified = true;
-			return node;
-		},
-		createEntityReference :	function(name){
-			var node = new EntityReference();
-			node.ownerDocument	= this;
-			node.nodeName	= name;
-			return node;
-		},
-		// Introduced in DOM Level 2:
-		createElementNS :	function(namespaceURI,qualifiedName){
-			var node = new Element();
-			var pl = qualifiedName.split(':');
-			var attrs	= node.attributes = new NamedNodeMap();
-			node.childNodes = new NodeList();
-			node.ownerDocument = this;
-			node.nodeName = qualifiedName;
-			node.tagName = qualifiedName;
-			node.namespaceURI = namespaceURI;
-			if(pl.length == 2){
-				node.prefix = pl[0];
-				node.localName = pl[1];
-			}else {
-				//el.prefix = null;
-				node.localName = qualifiedName;
-			}
-			attrs._ownerElement = node;
-			return node;
-		},
-		// Introduced in DOM Level 2:
-		createAttributeNS :	function(namespaceURI,qualifiedName){
-			var node = new Attr();
-			var pl = qualifiedName.split(':');
-			node.ownerDocument = this;
-			node.nodeName = qualifiedName;
-			node.name = qualifiedName;
-			node.namespaceURI = namespaceURI;
-			node.specified = true;
-			if(pl.length == 2){
-				node.prefix = pl[0];
-				node.localName = pl[1];
-			}else {
-				//el.prefix = null;
-				node.localName = qualifiedName;
-			}
-			return node;
-		}
-	};
-	_extends(Document,Node);
+	    function mapContains(event) {
+	      var rect = mapNode.getBoundingClientRect();
+	      return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;
+	    }
 
+	    function pointerDownOnSelection(skipPointerId) {
+	      var mode = context.mode();
+	      var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
 
-	function Element() {
-		this._nsMap = {};
-	}Element.prototype = {
-		nodeType : ELEMENT_NODE,
-		hasAttribute : function(name){
-			return this.getAttributeNode(name)!=null;
-		},
-		getAttribute : function(name){
-			var attr = this.getAttributeNode(name);
-			return attr && attr.value || '';
-		},
-		getAttributeNode : function(name){
-			return this.attributes.getNamedItem(name);
-		},
-		setAttribute : function(name, value){
-			var attr = this.ownerDocument.createAttribute(name);
-			attr.value = attr.nodeValue = "" + value;
-			this.setAttributeNode(attr);
-		},
-		removeAttribute : function(name){
-			var attr = this.getAttributeNode(name);
-			attr && this.removeAttributeNode(attr);
-		},
-		
-		//four real opeartion method
-		appendChild:function(newChild){
-			if(newChild.nodeType === DOCUMENT_FRAGMENT_NODE){
-				return this.insertBefore(newChild,null);
-			}else {
-				return _appendSingleChild(this,newChild);
-			}
-		},
-		setAttributeNode : function(newAttr){
-			return this.attributes.setNamedItem(newAttr);
-		},
-		setAttributeNodeNS : function(newAttr){
-			return this.attributes.setNamedItemNS(newAttr);
-		},
-		removeAttributeNode : function(oldAttr){
-			//console.log(this == oldAttr.ownerElement)
-			return this.attributes.removeNamedItem(oldAttr.nodeName);
-		},
-		//get real attribute name,and remove it by removeAttributeNode
-		removeAttributeNS : function(namespaceURI, localName){
-			var old = this.getAttributeNodeNS(namespaceURI, localName);
-			old && this.removeAttributeNode(old);
-		},
-		
-		hasAttributeNS : function(namespaceURI, localName){
-			return this.getAttributeNodeNS(namespaceURI, localName)!=null;
-		},
-		getAttributeNS : function(namespaceURI, localName){
-			var attr = this.getAttributeNodeNS(namespaceURI, localName);
-			return attr && attr.value || '';
-		},
-		setAttributeNS : function(namespaceURI, qualifiedName, value){
-			var attr = this.ownerDocument.createAttributeNS(namespaceURI, qualifiedName);
-			attr.value = attr.nodeValue = "" + value;
-			this.setAttributeNode(attr);
-		},
-		getAttributeNodeNS : function(namespaceURI, localName){
-			return this.attributes.getNamedItemNS(namespaceURI, localName);
-		},
-		
-		getElementsByTagName : function(tagName){
-			return new LiveNodeList(this,function(base){
-				var ls = [];
-				_visitNode(base,function(node){
-					if(node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)){
-						ls.push(node);
-					}
-				});
-				return ls;
-			});
-		},
-		getElementsByTagNameNS : function(namespaceURI, localName){
-			return new LiveNodeList(this,function(base){
-				var ls = [];
-				_visitNode(base,function(node){
-					if(node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)){
-						ls.push(node);
-					}
-				});
-				return ls;
-				
-			});
-		}
-	};
-	Document.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;
-	Document.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;
+	      for (var pointerId in _downPointers) {
+	        if (pointerId === 'spacebar' || pointerId === skipPointerId) continue;
+	        var pointerInfo = _downPointers[pointerId];
+	        var p1 = pointGetter(pointerInfo.firstEvent);
+	        var p2 = pointGetter(pointerInfo.lastEvent);
+	        if (geoVecLength(p1, p2) > _tolerancePx) continue;
+	        var datum = pointerInfo.firstEvent.target.__data__;
+	        var entity = datum && datum.properties && datum.properties.entity || datum;
+	        if (context.graph().hasEntity(entity.id)) return {
+	          pointerId: pointerId,
+	          entityId: entity.id,
+	          selected: selectedIDs.indexOf(entity.id) !== -1
+	        };
+	      }
 
+	      return null;
+	    }
+	  }
 
-	_extends(Element,Node);
-	function Attr() {
-	}Attr.prototype.nodeType = ATTRIBUTE_NODE;
-	_extends(Attr,Node);
-
-
-	function CharacterData() {
-	}CharacterData.prototype = {
-		data : '',
-		substringData : function(offset, count) {
-			return this.data.substring(offset, offset+count);
-		},
-		appendData: function(text) {
-			text = this.data+text;
-			this.nodeValue = this.data = text;
-			this.length = text.length;
-		},
-		insertData: function(offset,text) {
-			this.replaceData(offset,0,text);
-		
-		},
-		appendChild:function(newChild){
-			throw new Error(ExceptionMessage[HIERARCHY_REQUEST_ERR])
-		},
-		deleteData: function(offset, count) {
-			this.replaceData(offset,count,"");
-		},
-		replaceData: function(offset, count, text) {
-			var start = this.data.substring(0,offset);
-			var end = this.data.substring(offset+count);
-			text = start + text + end;
-			this.nodeValue = this.data = text;
-			this.length = text.length;
-		}
-	};
-	_extends(CharacterData,Node);
-	function Text() {
-	}Text.prototype = {
-		nodeName : "#text",
-		nodeType : TEXT_NODE,
-		splitText : function(offset) {
-			var text = this.data;
-			var newText = text.substring(offset);
-			text = text.substring(0, offset);
-			this.data = this.nodeValue = text;
-			this.length = text.length;
-			var newNode = this.ownerDocument.createTextNode(newText);
-			if(this.parentNode){
-				this.parentNode.insertBefore(newNode, this.nextSibling);
-			}
-			return newNode;
-		}
-	};
-	_extends(Text,CharacterData);
-	function Comment() {
-	}Comment.prototype = {
-		nodeName : "#comment",
-		nodeType : COMMENT_NODE
-	};
-	_extends(Comment,CharacterData);
+	  function processClick(datum, isMultiselect, point, alsoSelectId) {
+	    var mode = context.mode();
+	    var showMenu = _showMenu;
+	    var interactionType = _lastInteractionType;
+	    var entity = datum && datum.properties && datum.properties.entity;
+	    if (entity) datum = entity;
 
-	function CDATASection() {
-	}CDATASection.prototype = {
-		nodeName : "#cdata-section",
-		nodeType : CDATA_SECTION_NODE
-	};
-	_extends(CDATASection,CharacterData);
+	    if (datum && datum.type === 'midpoint') {
+	      // treat targeting midpoints as if targeting the parent way
+	      datum = datum.parents[0];
+	    }
 
+	    var newMode;
 
-	function DocumentType() {
-	}DocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;
-	_extends(DocumentType,Node);
+	    if (datum instanceof osmEntity) {
+	      // targeting an entity
+	      var selectedIDs = context.selectedIDs();
+	      context.selectedNoteID(null);
+	      context.selectedErrorID(null);
 
-	function Notation() {
-	}Notation.prototype.nodeType = NOTATION_NODE;
-	_extends(Notation,Node);
+	      if (!isMultiselect) {
+	        // don't change the selection if we're toggling the menu atop a multiselection
+	        if (!showMenu || selectedIDs.length <= 1 || selectedIDs.indexOf(datum.id) === -1) {
+	          if (alsoSelectId === datum.id) alsoSelectId = null;
+	          selectedIDs = (alsoSelectId ? [alsoSelectId] : []).concat([datum.id]); // always enter modeSelect even if the entity is already
+	          // selected since listeners may expect `context.enter` events,
+	          // e.g. in the walkthrough
 
-	function Entity() {
-	}Entity.prototype.nodeType = ENTITY_NODE;
-	_extends(Entity,Node);
+	          newMode = mode.id === 'select' ? mode.selectedIDs(selectedIDs) : modeSelect(context, selectedIDs).selectBehavior(behavior);
+	          context.enter(newMode);
+	        }
+	      } else {
+	        if (selectedIDs.indexOf(datum.id) !== -1) {
+	          // clicked entity is already in the selectedIDs list..
+	          if (!showMenu) {
+	            // deselect clicked entity, then reenter select mode or return to browse mode..
+	            selectedIDs = selectedIDs.filter(function (id) {
+	              return id !== datum.id;
+	            });
+	            newMode = selectedIDs.length ? mode.selectedIDs(selectedIDs) : modeBrowse(context).selectBehavior(behavior);
+	            context.enter(newMode);
+	          }
+	        } else {
+	          // clicked entity is not in the selected list, add it..
+	          selectedIDs = selectedIDs.concat([datum.id]);
+	          newMode = mode.selectedIDs(selectedIDs);
+	          context.enter(newMode);
+	        }
+	      }
+	    } else if (datum && datum.__featurehash__ && !isMultiselect) {
+	      // targeting custom data
+	      context.selectedNoteID(null).enter(modeSelectData(context, datum));
+	    } else if (datum instanceof osmNote && !isMultiselect) {
+	      // targeting a note
+	      context.selectedNoteID(datum.id).enter(modeSelectNote(context, datum.id));
+	    } else if (datum instanceof QAItem & !isMultiselect) {
+	      // targeting an external QA issue
+	      context.selectedErrorID(datum.id).enter(modeSelectError(context, datum.id, datum.service));
+	    } else {
+	      // targeting nothing
+	      context.selectedNoteID(null);
+	      context.selectedErrorID(null);
 
-	function EntityReference() {
-	}EntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;
-	_extends(EntityReference,Node);
+	      if (!isMultiselect && mode.id !== 'browse') {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
 
-	function DocumentFragment() {
-	}DocumentFragment.prototype.nodeName =	"#document-fragment";
-	DocumentFragment.prototype.nodeType =	DOCUMENT_FRAGMENT_NODE;
-	_extends(DocumentFragment,Node);
+	    context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it
 
+	    if (showMenu) context.ui().showEditMenu(point, interactionType);
+	    resetProperties();
+	  }
 
-	function ProcessingInstruction() {
-	}
-	ProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;
-	_extends(ProcessingInstruction,Node);
-	function XMLSerializer$1(){}
-	XMLSerializer$1.prototype.serializeToString = function(node,isHtml,nodeFilter){
-		return nodeSerializeToString.call(node,isHtml,nodeFilter);
-	};
-	Node.prototype.toString = nodeSerializeToString;
-	function nodeSerializeToString(isHtml,nodeFilter){
-		var buf = [];
-		var refNode = this.nodeType == 9?this.documentElement:this;
-		var prefix = refNode.prefix;
-		var uri = refNode.namespaceURI;
-		
-		if(uri && prefix == null){
-			//console.log(prefix)
-			var prefix = refNode.lookupPrefix(uri);
-			if(prefix == null){
-				//isHTML = true;
-				var visibleNamespaces=[
-				{namespace:uri,prefix:null} ];
-			}
-		}
-		serializeToString(this,buf,isHtml,nodeFilter,visibleNamespaces);
-		//console.log('###',this.nodeType,uri,prefix,buf.join(''))
-		return buf.join('');
-	}
-	function needNamespaceDefine(node,isHTML, visibleNamespaces) {
-		var prefix = node.prefix||'';
-		var uri = node.namespaceURI;
-		if (!prefix && !uri){
-			return false;
-		}
-		if (prefix === "xml" && uri === "http://www.w3.org/XML/1998/namespace" 
-			|| uri == 'http://www.w3.org/2000/xmlns/'){
-			return false;
-		}
-		
-		var i = visibleNamespaces.length; 
-		//console.log('@@@@',node.tagName,prefix,uri,visibleNamespaces)
-		while (i--) {
-			var ns = visibleNamespaces[i];
-			// get namespace prefix
-			//console.log(node.nodeType,node.tagName,ns.prefix,prefix)
-			if (ns.prefix == prefix){
-				return ns.namespace != uri;
-			}
-		}
-		//console.log(isHTML,uri,prefix=='')
-		//if(isHTML && prefix ==null && uri == 'http://www.w3.org/1999/xhtml'){
-		//	return false;
-		//}
-		//node.flag = '11111'
-		//console.error(3,true,node.flag,node.prefix,node.namespaceURI)
-		return true;
-	}
-	function serializeToString(node,buf,isHTML,nodeFilter,visibleNamespaces){
-		if(nodeFilter){
-			node = nodeFilter(node);
-			if(node){
-				if(typeof node == 'string'){
-					buf.push(node);
-					return;
-				}
-			}else {
-				return;
-			}
-			//buf.sort.apply(attrs, attributeSorter);
-		}
-		switch(node.nodeType){
-		case ELEMENT_NODE:
-			if (!visibleNamespaces) { visibleNamespaces = []; }
-			var startVisibleNamespaces = visibleNamespaces.length;
-			var attrs = node.attributes;
-			var len = attrs.length;
-			var child = node.firstChild;
-			var nodeName = node.tagName;
-			
-			isHTML =  (htmlns === node.namespaceURI) ||isHTML; 
-			buf.push('<',nodeName);
-			
-			
-			
-			for(var i=0;i<len;i++){
-				// add namespaces for attributes
-				var attr = attrs.item(i);
-				if (attr.prefix == 'xmlns') {
-					visibleNamespaces.push({ prefix: attr.localName, namespace: attr.value });
-				}else if(attr.nodeName == 'xmlns'){
-					visibleNamespaces.push({ prefix: '', namespace: attr.value });
-				}
-			}
-			for(var i=0;i<len;i++){
-				var attr = attrs.item(i);
-				if (needNamespaceDefine(attr,isHTML, visibleNamespaces)) {
-					var prefix = attr.prefix||'';
-					var uri = attr.namespaceURI;
-					var ns = prefix ? ' xmlns:' + prefix : " xmlns";
-					buf.push(ns, '="' , uri , '"');
-					visibleNamespaces.push({ prefix: prefix, namespace:uri });
-				}
-				serializeToString(attr,buf,isHTML,nodeFilter,visibleNamespaces);
-			}
-			// add namespace for current node		
-			if (needNamespaceDefine(node,isHTML, visibleNamespaces)) {
-				var prefix = node.prefix||'';
-				var uri = node.namespaceURI;
-				var ns = prefix ? ' xmlns:' + prefix : " xmlns";
-				buf.push(ns, '="' , uri , '"');
-				visibleNamespaces.push({ prefix: prefix, namespace:uri });
-			}
-			
-			if(child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)){
-				buf.push('>');
-				//if is cdata child node
-				if(isHTML && /^script$/i.test(nodeName)){
-					while(child){
-						if(child.data){
-							buf.push(child.data);
-						}else {
-							serializeToString(child,buf,isHTML,nodeFilter,visibleNamespaces);
-						}
-						child = child.nextSibling;
-					}
-				}else
-				{
-					while(child){
-						serializeToString(child,buf,isHTML,nodeFilter,visibleNamespaces);
-						child = child.nextSibling;
-					}
-				}
-				buf.push('</',nodeName,'>');
-			}else {
-				buf.push('/>');
-			}
-			// remove added visible namespaces
-			//visibleNamespaces.length = startVisibleNamespaces;
-			return;
-		case DOCUMENT_NODE:
-		case DOCUMENT_FRAGMENT_NODE:
-			var child = node.firstChild;
-			while(child){
-				serializeToString(child,buf,isHTML,nodeFilter,visibleNamespaces);
-				child = child.nextSibling;
-			}
-			return;
-		case ATTRIBUTE_NODE:
-			return buf.push(' ',node.name,'="',node.value.replace(/[<&"]/g,_xmlEncoder),'"');
-		case TEXT_NODE:
-			return buf.push(node.data.replace(/[<&]/g,_xmlEncoder));
-		case CDATA_SECTION_NODE:
-			return buf.push( '<![CDATA[',node.data,']]>');
-		case COMMENT_NODE:
-			return buf.push( "<!--",node.data,"-->");
-		case DOCUMENT_TYPE_NODE:
-			var pubid = node.publicId;
-			var sysid = node.systemId;
-			buf.push('<!DOCTYPE ',node.name);
-			if(pubid){
-				buf.push(' PUBLIC "',pubid);
-				if (sysid && sysid!='.') {
-					buf.push( '" "',sysid);
-				}
-				buf.push('">');
-			}else if(sysid && sysid!='.'){
-				buf.push(' SYSTEM "',sysid,'">');
-			}else {
-				var sub = node.internalSubset;
-				if(sub){
-					buf.push(" [",sub,"]");
-				}
-				buf.push(">");
-			}
-			return;
-		case PROCESSING_INSTRUCTION_NODE:
-			return buf.push( "<?",node.target," ",node.data,"?>");
-		case ENTITY_REFERENCE_NODE:
-			return buf.push( '&',node.nodeName,';');
-		//case ENTITY_NODE:
-		//case NOTATION_NODE:
-		default:
-			buf.push('??',node.nodeName);
-		}
-	}
-	function importNode(doc,node,deep){
-		var node2;
-		switch (node.nodeType) {
-		case ELEMENT_NODE:
-			node2 = node.cloneNode(false);
-			node2.ownerDocument = doc;
-			//var attrs = node2.attributes;
-			//var len = attrs.length;
-			//for(var i=0;i<len;i++){
-				//node2.setAttributeNodeNS(importNode(doc,attrs.item(i),deep));
-			//}
-		case DOCUMENT_FRAGMENT_NODE:
-			break;
-		case ATTRIBUTE_NODE:
-			deep = true;
-			break;
-		//case ENTITY_REFERENCE_NODE:
-		//case PROCESSING_INSTRUCTION_NODE:
-		////case TEXT_NODE:
-		//case CDATA_SECTION_NODE:
-		//case COMMENT_NODE:
-		//	deep = false;
-		//	break;
-		//case DOCUMENT_NODE:
-		//case DOCUMENT_TYPE_NODE:
-		//cannot be imported.
-		//case ENTITY_NODE:
-		//case NOTATION_NODE：
-		//can not hit in level3
-		//default:throw e;
-		}
-		if(!node2){
-			node2 = node.cloneNode(false);//false
-		}
-		node2.ownerDocument = doc;
-		node2.parentNode = null;
-		if(deep){
-			var child = node.firstChild;
-			while(child){
-				node2.appendChild(importNode(doc,child,deep));
-				child = child.nextSibling;
-			}
-		}
-		return node2;
-	}
-	//
-	//var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,
-	//					attributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};
-	function cloneNode(doc,node,deep){
-		var node2 = new node.constructor();
-		for(var n in node){
-			var v = node[n];
-			if(typeof v != 'object' ){
-				if(v != node2[n]){
-					node2[n] = v;
-				}
-			}
-		}
-		if(node.childNodes){
-			node2.childNodes = new NodeList();
-		}
-		node2.ownerDocument = doc;
-		switch (node2.nodeType) {
-		case ELEMENT_NODE:
-			var attrs	= node.attributes;
-			var attrs2	= node2.attributes = new NamedNodeMap();
-			var len = attrs.length;
-			attrs2._ownerElement = node2;
-			for(var i=0;i<len;i++){
-				node2.setAttributeNode(cloneNode(doc,attrs.item(i),true));
-			}
-			break;	case ATTRIBUTE_NODE:
-			deep = true;
-		}
-		if(deep){
-			var child = node.firstChild;
-			while(child){
-				node2.appendChild(cloneNode(doc,child,deep));
-				child = child.nextSibling;
-			}
-		}
-		return node2;
-	}
-
-	function __set__(object,key,value){
-		object[key] = value;
-	}
-	//do dynamic
-	try{
-		if(Object.defineProperty){
-			Object.defineProperty(LiveNodeList.prototype,'length',{
-				get:function(){
-					_updateLiveList(this);
-					return this.$$length;
-				}
-			});
-			Object.defineProperty(Node.prototype,'textContent',{
-				get:function(){
-					return getTextContent(this);
-				},
-				set:function(data){
-					switch(this.nodeType){
-					case ELEMENT_NODE:
-					case DOCUMENT_FRAGMENT_NODE:
-						while(this.firstChild){
-							this.removeChild(this.firstChild);
-						}
-						if(data || String(data)){
-							this.appendChild(this.ownerDocument.createTextNode(data));
-						}
-						break;
-					default:
-						//TODO:
-						this.data = data;
-						this.value = data;
-						this.nodeValue = data;
-					}
-				}
-			});
-			
-			function getTextContent(node){
-				switch(node.nodeType){
-				case ELEMENT_NODE:
-				case DOCUMENT_FRAGMENT_NODE:
-					var buf = [];
-					node = node.firstChild;
-					while(node){
-						if(node.nodeType!==7 && node.nodeType !==8){
-							buf.push(getTextContent(node));
-						}
-						node = node.nextSibling;
-					}
-					return buf.join('');
-				default:
-					return node.nodeValue;
-				}
-			}
-			__set__ = function(object,key,value){
-				//console.log(value)
-				object['$$'+key] = value;
-			};
-		}
-	}catch(e){//ie8
-	}
+	  function cancelLongPress() {
+	    if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
+	    _longPressTimeout = null;
+	  }
 
-	//if(typeof require == 'function'){
-		var DOMImplementation_1 = DOMImplementation;
-		var XMLSerializer_1 = XMLSerializer$1;
-	//}
+	  function resetProperties() {
+	    cancelLongPress();
+	    _showMenu = false;
+	    _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
+	  }
 
-	var dom = {
-		DOMImplementation: DOMImplementation_1,
-		XMLSerializer: XMLSerializer_1
-	};
+	  function behavior(selection) {
+	    resetProperties();
+	    _lastMouseEvent = context.map().lastPointerEvent();
+	    select(window).on('keydown.select', keydown).on('keyup.select', keyup).on(_pointerPrefix + 'move.select', pointermove, true).on(_pointerPrefix + 'up.select', pointerup, true).on('pointercancel.select', pointercancel, true).on('contextmenu.select-window', function (d3_event) {
+	      // Edge and IE really like to show the contextmenu on the
+	      // menubar when user presses a keyboard menu button
+	      // even after we've already preventdefaulted the key event.
+	      var e = d3_event;
 
-	var domParser = createCommonjsModule(function (module, exports) {
-	function DOMParser(options){
-		this.options = options ||{locator:{}};
-		
-	}
-	DOMParser.prototype.parseFromString = function(source,mimeType){
-		var options = this.options;
-		var sax =  new XMLReader();
-		var domBuilder = options.domBuilder || new DOMHandler();//contentHandler and LexicalHandler
-		var errorHandler = options.errorHandler;
-		var locator = options.locator;
-		var defaultNSMap = options.xmlns||{};
-		var entityMap = {'lt':'<','gt':'>','amp':'&','quot':'"','apos':"'"};
-		if(locator){
-			domBuilder.setDocumentLocator(locator);
-		}
-		
-		sax.errorHandler = buildErrorHandler(errorHandler,domBuilder,locator);
-		sax.domBuilder = options.domBuilder || domBuilder;
-		if(/\/x?html?$/.test(mimeType)){
-			entityMap.nbsp = '\xa0';
-			entityMap.copy = '\xa9';
-			defaultNSMap['']= 'http://www.w3.org/1999/xhtml';
-		}
-		defaultNSMap.xml = defaultNSMap.xml || 'http://www.w3.org/XML/1998/namespace';
-		if(source){
-			sax.parse(source,defaultNSMap,entityMap);
-		}else {
-			sax.errorHandler.error("invalid doc source");
-		}
-		return domBuilder.doc;
-	};
-	function buildErrorHandler(errorImpl,domBuilder,locator){
-		if(!errorImpl){
-			if(domBuilder instanceof DOMHandler){
-				return domBuilder;
-			}
-			errorImpl = domBuilder ;
-		}
-		var errorHandler = {};
-		var isCallback = errorImpl instanceof Function;
-		locator = locator||{};
-		function build(key){
-			var fn = errorImpl[key];
-			if(!fn && isCallback){
-				fn = errorImpl.length == 2?function(msg){errorImpl(key,msg);}:errorImpl;
-			}
-			errorHandler[key] = fn && function(msg){
-				fn('[xmldom '+key+']\t'+msg+_locator(locator));
-			}||function(){};
-		}
-		build('warning');
-		build('error');
-		build('fatalError');
-		return errorHandler;
-	}
+	      if (+e.clientX === 0 && +e.clientY === 0) {
+	        d3_event.preventDefault();
+	      }
+	    });
+	    selection.on(_pointerPrefix + 'down.select', pointerdown).on('contextmenu.select', contextmenu);
+	    /*if (d3_event && d3_event.shiftKey) {
+	        context.surface()
+	            .classed('behavior-multiselect', true);
+	    }*/
+	  }
 
-	//console.log('#\n\n\n\n\n\n\n####')
-	/**
-	 * +ContentHandler+ErrorHandler
-	 * +LexicalHandler+EntityResolver2
-	 * -DeclHandler-DTDHandler 
-	 * 
-	 * DefaultHandler:EntityResolver, DTDHandler, ContentHandler, ErrorHandler
-	 * DefaultHandler2:DefaultHandler,LexicalHandler, DeclHandler, EntityResolver2
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/helpers/DefaultHandler.html
-	 */
-	function DOMHandler() {
-	    this.cdata = false;
-	}
-	function position(locator,node){
-		node.lineNumber = locator.lineNumber;
-		node.columnNumber = locator.columnNumber;
-	}
-	/**
-	 * @see org.xml.sax.ContentHandler#startDocument
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html
-	 */ 
-	DOMHandler.prototype = {
-		startDocument : function() {
-	    	this.doc = new DOMImplementation().createDocument(null, null, null);
-	    	if (this.locator) {
-	        	this.doc.documentURI = this.locator.systemId;
-	    	}
-		},
-		startElement:function(namespaceURI, localName, qName, attrs) {
-			var doc = this.doc;
-		    var el = doc.createElementNS(namespaceURI, qName||localName);
-		    var len = attrs.length;
-		    appendElement(this, el);
-		    this.currentElement = el;
-		    
-			this.locator && position(this.locator,el);
-		    for (var i = 0 ; i < len; i++) {
-		        var namespaceURI = attrs.getURI(i);
-		        var value = attrs.getValue(i);
-		        var qName = attrs.getQName(i);
-				var attr = doc.createAttributeNS(namespaceURI, qName);
-				this.locator &&position(attrs.getLocator(i),attr);
-				attr.value = attr.nodeValue = value;
-				el.setAttributeNode(attr);
-		    }
-		},
-		endElement:function(namespaceURI, localName, qName) {
-			var current = this.currentElement;
-			var tagName = current.tagName;
-			this.currentElement = current.parentNode;
-		},
-		startPrefixMapping:function(prefix, uri) {
-		},
-		endPrefixMapping:function(prefix) {
-		},
-		processingInstruction:function(target, data) {
-		    var ins = this.doc.createProcessingInstruction(target, data);
-		    this.locator && position(this.locator,ins);
-		    appendElement(this, ins);
-		},
-		ignorableWhitespace:function(ch, start, length) {
-		},
-		characters:function(chars, start, length) {
-			chars = _toString.apply(this,arguments);
-			//console.log(chars)
-			if(chars){
-				if (this.cdata) {
-					var charNode = this.doc.createCDATASection(chars);
-				} else {
-					var charNode = this.doc.createTextNode(chars);
-				}
-				if(this.currentElement){
-					this.currentElement.appendChild(charNode);
-				}else if(/^\s*$/.test(chars)){
-					this.doc.appendChild(charNode);
-					//process xml
-				}
-				this.locator && position(this.locator,charNode);
-			}
-		},
-		skippedEntity:function(name) {
-		},
-		endDocument:function() {
-			this.doc.normalize();
-		},
-		setDocumentLocator:function (locator) {
-		    if(this.locator = locator){// && !('lineNumber' in locator)){
-		    	locator.lineNumber = 0;
-		    }
-		},
-		//LexicalHandler
-		comment:function(chars, start, length) {
-			chars = _toString.apply(this,arguments);
-		    var comm = this.doc.createComment(chars);
-		    this.locator && position(this.locator,comm);
-		    appendElement(this, comm);
-		},
-		
-		startCDATA:function() {
-		    //used in characters() methods
-		    this.cdata = true;
-		},
-		endCDATA:function() {
-		    this.cdata = false;
-		},
-		
-		startDTD:function(name, publicId, systemId) {
-			var impl = this.doc.implementation;
-		    if (impl && impl.createDocumentType) {
-		        var dt = impl.createDocumentType(name, publicId, systemId);
-		        this.locator && position(this.locator,dt);
-		        appendElement(this, dt);
-		    }
-		},
-		/**
-		 * @see org.xml.sax.ErrorHandler
-		 * @link http://www.saxproject.org/apidoc/org/xml/sax/ErrorHandler.html
-		 */
-		warning:function(error) {
-			console.warn('[xmldom warning]\t'+error,_locator(this.locator));
-		},
-		error:function(error) {
-			console.error('[xmldom error]\t'+error,_locator(this.locator));
-		},
-		fatalError:function(error) {
-			console.error('[xmldom fatalError]\t'+error,_locator(this.locator));
-		    throw error;
-		}
-	};
-	function _locator(l){
-		if(l){
-			return '\n@'+(l.systemId ||'')+'#[line:'+l.lineNumber+',col:'+l.columnNumber+']'
-		}
-	}
-	function _toString(chars,start,length){
-		if(typeof chars == 'string'){
-			return chars.substr(start,length)
-		}else {//java sax connect width xmldom on rhino(what about: "? && !(chars instanceof String)")
-			if(chars.length >= start+length || start){
-				return new java.lang.String(chars,start,length)+'';
-			}
-			return chars;
-		}
+	  behavior.off = function (selection) {
+	    cancelLongPress();
+	    select(window).on('keydown.select', null).on('keyup.select', null).on('contextmenu.select-window', null).on(_pointerPrefix + 'move.select', null, true).on(_pointerPrefix + 'up.select', null, true).on('pointercancel.select', null, true);
+	    selection.on(_pointerPrefix + 'down.select', null).on('contextmenu.select', null);
+	    context.surface().classed('behavior-multiselect', false);
+	  };
+
+	  return behavior;
 	}
 
-	/*
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/LexicalHandler.html
-	 * used method of org.xml.sax.ext.LexicalHandler:
-	 *  #comment(chars, start, length)
-	 *  #startCDATA()
-	 *  #endCDATA()
-	 *  #startDTD(name, publicId, systemId)
-	 *
-	 *
-	 * IGNORED method of org.xml.sax.ext.LexicalHandler:
-	 *  #endDTD()
-	 *  #startEntity(name)
-	 *  #endEntity(name)
-	 *
-	 *
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/DeclHandler.html
-	 * IGNORED method of org.xml.sax.ext.DeclHandler
-	 * 	#attributeDecl(eName, aName, type, mode, value)
-	 *  #elementDecl(name, model)
-	 *  #externalEntityDecl(name, publicId, systemId)
-	 *  #internalEntityDecl(name, value)
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/EntityResolver2.html
-	 * IGNORED method of org.xml.sax.EntityResolver2
-	 *  #resolveEntity(String name,String publicId,String baseURI,String systemId)
-	 *  #resolveEntity(publicId, systemId)
-	 *  #getExternalSubset(name, baseURI)
-	 * @link http://www.saxproject.org/apidoc/org/xml/sax/DTDHandler.html
-	 * IGNORED method of org.xml.sax.DTDHandler
-	 *  #notationDecl(name, publicId, systemId) {};
-	 *  #unparsedEntityDecl(name, publicId, systemId, notationName) {};
-	 */
-	"endDTD,startEntity,endEntity,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,resolveEntity,getExternalSubset,notationDecl,unparsedEntityDecl".replace(/\w+/g,function(key){
-		DOMHandler.prototype[key] = function(){return null};
-	});
+	function behaviorDrawWay(context, wayID, mode, startGraph) {
+	  var dispatch$1 = dispatch('rejectedSelfIntersection');
+	  var behavior = behaviorDraw(context); // Must be set by `drawWay.nodeIndex` before each install of this behavior.
 
-	/* Private static helpers treated below as private instance methods, so don't need to add these to the public API; we might use a Relator to also get rid of non-standard public properties */
-	function appendElement (hander,node) {
-	    if (!hander.currentElement) {
-	        hander.doc.appendChild(node);
-	    } else {
-	        hander.currentElement.appendChild(node);
-	    }
-	}//appendChild and setAttributeNS are preformance key
+	  var _nodeIndex;
 
-	//if(typeof require == 'function'){
-		var XMLReader = sax.XMLReader;
-		var DOMImplementation = exports.DOMImplementation = dom.DOMImplementation;
-		exports.XMLSerializer = dom.XMLSerializer ;
-		exports.DOMParser = DOMParser;
-	//}
-	});
+	  var _origWay;
 
-	var togeojson = createCommonjsModule(function (module, exports) {
-	var toGeoJSON = (function() {
+	  var _wayGeometry;
 
-	    var removeSpace = /\s*/g,
-	        trimSpace = /^\s*|\s*$/g,
-	        splitSpace = /\s+/;
-	    // generate a short, numeric hash of a string
-	    function okhash(x) {
-	        if (!x || !x.length) { return 0; }
-	        for (var i = 0, h = 0; i < x.length; i++) {
-	            h = ((h << 5) - h) + x.charCodeAt(i) | 0;
-	        } return h;
-	    }
-	    // all Y children of X
-	    function get(x, y) { return x.getElementsByTagName(y); }
-	    function attr(x, y) { return x.getAttribute(y); }
-	    function attrf(x, y) { return parseFloat(attr(x, y)); }
-	    // one Y child of X, if any, otherwise null
-	    function get1(x, y) { var n = get(x, y); return n.length ? n[0] : null; }
-	    // https://developer.mozilla.org/en-US/docs/Web/API/Node.normalize
-	    function norm(el) { if (el.normalize) { el.normalize(); } return el; }
-	    // cast array x into numbers
-	    function numarray(x) {
-	        for (var j = 0, o = []; j < x.length; j++) { o[j] = parseFloat(x[j]); }
-	        return o;
-	    }
-	    // get the content of a text node, if any
-	    function nodeVal(x) {
-	        if (x) { norm(x); }
-	        return (x && x.textContent) || '';
-	    }
-	    // get the contents of multiple text nodes, if present
-	    function getMulti(x, ys) {
-	        var o = {}, n, k;
-	        for (k = 0; k < ys.length; k++) {
-	            n = get1(x, ys[k]);
-	            if (n) { o[ys[k]] = nodeVal(n); }
-	        }
-	        return o;
-	    }
-	    // add properties of Y to X, overwriting if present in both
-	    function extend(x, y) { for (var k in y) { x[k] = y[k]; } }
-	    // get one coordinate from a coordinate array, if any
-	    function coord1(v) { return numarray(v.replace(removeSpace, '').split(',')); }
-	    // get all coordinates from a coordinate array as [[],[]]
-	    function coord(v) {
-	        var coords = v.replace(trimSpace, '').split(splitSpace),
-	            o = [];
-	        for (var i = 0; i < coords.length; i++) {
-	            o.push(coord1(coords[i]));
-	        }
-	        return o;
-	    }
-	    function coordPair(x) {
-	        var ll = [attrf(x, 'lon'), attrf(x, 'lat')],
-	            ele = get1(x, 'ele'),
-	            // handle namespaced attribute in browser
-	            heartRate = get1(x, 'gpxtpx:hr') || get1(x, 'hr'),
-	            time = get1(x, 'time'),
-	            e;
-	        if (ele) {
-	            e = parseFloat(nodeVal(ele));
-	            if (!isNaN(e)) {
-	                ll.push(e);
-	            }
-	        }
-	        return {
-	            coordinates: ll,
-	            time: time ? nodeVal(time) : null,
-	            heartRate: heartRate ? parseFloat(nodeVal(heartRate)) : null
-	        };
-	    }
+	  var _headNodeID;
 
-	    // create a new feature collection parent object
-	    function fc() {
-	        return {
-	            type: 'FeatureCollection',
-	            features: []
-	        };
-	    }
+	  var _annotation;
 
-	    var serializer;
-	    if (typeof XMLSerializer !== 'undefined') {
-	        /* istanbul ignore next */
-	        serializer = new XMLSerializer();
-	    // only require xmldom in a node environment
-	    } else if ( typeof process === 'object' && !process.browser) {
-	        serializer = new (domParser.XMLSerializer)();
-	    }
-	    function xml2str(str) {
-	        // IE9 will create a new XMLSerializer but it'll crash immediately.
-	        // This line is ignored because we don't run coverage tests in IE9
-	        /* istanbul ignore next */
-	        if (str.xml !== undefined) { return str.xml; }
-	        return serializer.serializeToString(str);
-	    }
+	  var _pointerHasMoved = false; // The osmNode to be placed.
+	  // This is temporary and just follows the mouse cursor until an "add" event occurs.
 
-	    var t = {
-	        kml: function(doc) {
-
-	            var gj = fc(),
-	                // styleindex keeps track of hashed styles in order to match features
-	                styleIndex = {}, styleByHash = {},
-	                // stylemapindex keeps track of style maps to expose in properties
-	                styleMapIndex = {},
-	                // atomic geospatial types supported by KML - MultiGeometry is
-	                // handled separately
-	                geotypes = ['Polygon', 'LineString', 'Point', 'Track', 'gx:Track'],
-	                // all root placemarks in the file
-	                placemarks = get(doc, 'Placemark'),
-	                styles = get(doc, 'Style'),
-	                styleMaps = get(doc, 'StyleMap');
-
-	            for (var k = 0; k < styles.length; k++) {
-	                var hash = okhash(xml2str(styles[k])).toString(16);
-	                styleIndex['#' + attr(styles[k], 'id')] = hash;
-	                styleByHash[hash] = styles[k];
-	            }
-	            for (var l = 0; l < styleMaps.length; l++) {
-	                styleIndex['#' + attr(styleMaps[l], 'id')] = okhash(xml2str(styleMaps[l])).toString(16);
-	                var pairs = get(styleMaps[l], 'Pair');
-	                var pairsMap = {};
-	                for (var m = 0; m < pairs.length; m++) {
-	                    pairsMap[nodeVal(get1(pairs[m], 'key'))] = nodeVal(get1(pairs[m], 'styleUrl'));
-	                }
-	                styleMapIndex['#' + attr(styleMaps[l], 'id')] = pairsMap;
+	  var _drawNode;
 
-	            }
-	            for (var j = 0; j < placemarks.length; j++) {
-	                gj.features = gj.features.concat(getPlacemark(placemarks[j]));
-	            }
-	            function kmlColor(v) {
-	                var color, opacity;
-	                v = v || '';
-	                if (v.substr(0, 1) === '#') { v = v.substr(1); }
-	                if (v.length === 6 || v.length === 3) { color = v; }
-	                if (v.length === 8) {
-	                    opacity = parseInt(v.substr(0, 2), 16) / 255;
-	                    color = '#' + v.substr(6, 2) +
-	                        v.substr(4, 2) +
-	                        v.substr(2, 2);
-	                }
-	                return [color, isNaN(opacity) ? undefined : opacity];
-	            }
-	            function gxCoord(v) { return numarray(v.split(' ')); }
-	            function gxCoords(root) {
-	                var elems = get(root, 'coord'), coords = [], times = [];
-	                if (elems.length === 0) { elems = get(root, 'gx:coord'); }
-	                for (var i = 0; i < elems.length; i++) { coords.push(gxCoord(nodeVal(elems[i]))); }
-	                var timeElems = get(root, 'when');
-	                for (var j = 0; j < timeElems.length; j++) { times.push(nodeVal(timeElems[j])); }
-	                return {
-	                    coords: coords,
-	                    times: times
-	                };
-	            }
-	            function getGeometry(root) {
-	                var geomNode, geomNodes, i, j, k, geoms = [], coordTimes = [];
-	                if (get1(root, 'MultiGeometry')) { return getGeometry(get1(root, 'MultiGeometry')); }
-	                if (get1(root, 'MultiTrack')) { return getGeometry(get1(root, 'MultiTrack')); }
-	                if (get1(root, 'gx:MultiTrack')) { return getGeometry(get1(root, 'gx:MultiTrack')); }
-	                for (i = 0; i < geotypes.length; i++) {
-	                    geomNodes = get(root, geotypes[i]);
-	                    if (geomNodes) {
-	                        for (j = 0; j < geomNodes.length; j++) {
-	                            geomNode = geomNodes[j];
-	                            if (geotypes[i] === 'Point') {
-	                                geoms.push({
-	                                    type: 'Point',
-	                                    coordinates: coord1(nodeVal(get1(geomNode, 'coordinates')))
-	                                });
-	                            } else if (geotypes[i] === 'LineString') {
-	                                geoms.push({
-	                                    type: 'LineString',
-	                                    coordinates: coord(nodeVal(get1(geomNode, 'coordinates')))
-	                                });
-	                            } else if (geotypes[i] === 'Polygon') {
-	                                var rings = get(geomNode, 'LinearRing'),
-	                                    coords = [];
-	                                for (k = 0; k < rings.length; k++) {
-	                                    coords.push(coord(nodeVal(get1(rings[k], 'coordinates'))));
-	                                }
-	                                geoms.push({
-	                                    type: 'Polygon',
-	                                    coordinates: coords
-	                                });
-	                            } else if (geotypes[i] === 'Track' ||
-	                                geotypes[i] === 'gx:Track') {
-	                                var track = gxCoords(geomNode);
-	                                geoms.push({
-	                                    type: 'LineString',
-	                                    coordinates: track.coords
-	                                });
-	                                if (track.times.length) { coordTimes.push(track.times); }
-	                            }
-	                        }
-	                    }
-	                }
-	                return {
-	                    geoms: geoms,
-	                    coordTimes: coordTimes
-	                };
-	            }
-	            function getPlacemark(root) {
-	                var geomsAndTimes = getGeometry(root), i, properties = {},
-	                    name = nodeVal(get1(root, 'name')),
-	                    address = nodeVal(get1(root, 'address')),
-	                    styleUrl = nodeVal(get1(root, 'styleUrl')),
-	                    description = nodeVal(get1(root, 'description')),
-	                    timeSpan = get1(root, 'TimeSpan'),
-	                    timeStamp = get1(root, 'TimeStamp'),
-	                    extendedData = get1(root, 'ExtendedData'),
-	                    lineStyle = get1(root, 'LineStyle'),
-	                    polyStyle = get1(root, 'PolyStyle'),
-	                    visibility = get1(root, 'visibility');
-
-	                if (!geomsAndTimes.geoms.length) { return []; }
-	                if (name) { properties.name = name; }
-	                if (address) { properties.address = address; }
-	                if (styleUrl) {
-	                    if (styleUrl[0] !== '#') {
-	                        styleUrl = '#' + styleUrl;
-	                    }
+	  var _didResolveTempEdit = false;
 
-	                    properties.styleUrl = styleUrl;
-	                    if (styleIndex[styleUrl]) {
-	                        properties.styleHash = styleIndex[styleUrl];
-	                    }
-	                    if (styleMapIndex[styleUrl]) {
-	                        properties.styleMapHash = styleMapIndex[styleUrl];
-	                        properties.styleHash = styleIndex[styleMapIndex[styleUrl].normal];
-	                    }
-	                    // Try to populate the lineStyle or polyStyle since we got the style hash
-	                    var style = styleByHash[properties.styleHash];
-	                    if (style) {
-	                        if (!lineStyle) { lineStyle = get1(style, 'LineStyle'); }
-	                        if (!polyStyle) { polyStyle = get1(style, 'PolyStyle'); }
-	                    }
-	                }
-	                if (description) { properties.description = description; }
-	                if (timeSpan) {
-	                    var begin = nodeVal(get1(timeSpan, 'begin'));
-	                    var end = nodeVal(get1(timeSpan, 'end'));
-	                    properties.timespan = { begin: begin, end: end };
-	                }
-	                if (timeStamp) {
-	                    properties.timestamp = nodeVal(get1(timeStamp, 'when'));
-	                }
-	                if (lineStyle) {
-	                    var linestyles = kmlColor(nodeVal(get1(lineStyle, 'color'))),
-	                        color = linestyles[0],
-	                        opacity = linestyles[1],
-	                        width = parseFloat(nodeVal(get1(lineStyle, 'width')));
-	                    if (color) { properties.stroke = color; }
-	                    if (!isNaN(opacity)) { properties['stroke-opacity'] = opacity; }
-	                    if (!isNaN(width)) { properties['stroke-width'] = width; }
-	                }
-	                if (polyStyle) {
-	                    var polystyles = kmlColor(nodeVal(get1(polyStyle, 'color'))),
-	                        pcolor = polystyles[0],
-	                        popacity = polystyles[1],
-	                        fill = nodeVal(get1(polyStyle, 'fill')),
-	                        outline = nodeVal(get1(polyStyle, 'outline'));
-	                    if (pcolor) { properties.fill = pcolor; }
-	                    if (!isNaN(popacity)) { properties['fill-opacity'] = popacity; }
-	                    if (fill) { properties['fill-opacity'] = fill === '1' ? properties['fill-opacity'] || 1 : 0; }
-	                    if (outline) { properties['stroke-opacity'] = outline === '1' ? properties['stroke-opacity'] || 1 : 0; }
-	                }
-	                if (extendedData) {
-	                    var datas = get(extendedData, 'Data'),
-	                        simpleDatas = get(extendedData, 'SimpleData');
+	  function createDrawNode(loc) {
+	    // don't make the draw node until we actually need it
+	    _drawNode = osmNode({
+	      loc: loc
+	    });
+	    context.pauseChangeDispatch();
+	    context.replace(function actionAddDrawNode(graph) {
+	      // add the draw node to the graph and insert it into the way
+	      var way = graph.entity(wayID);
+	      return graph.replace(_drawNode).replace(way.addNode(_drawNode.id, _nodeIndex));
+	    }, _annotation);
+	    context.resumeChangeDispatch();
+	    setActiveElements();
+	  }
+
+	  function removeDrawNode() {
+	    context.pauseChangeDispatch();
+	    context.replace(function actionDeleteDrawNode(graph) {
+	      var way = graph.entity(wayID);
+	      return graph.replace(way.removeNode(_drawNode.id)).remove(_drawNode);
+	    }, _annotation);
+	    _drawNode = undefined;
+	    context.resumeChangeDispatch();
+	  }
+
+	  function keydown(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope')) {
+	        context.surface().classed('nope-suppressed', true);
+	      }
 
-	                    for (i = 0; i < datas.length; i++) {
-	                        properties[datas[i].getAttribute('name')] = nodeVal(get1(datas[i], 'value'));
-	                    }
-	                    for (i = 0; i < simpleDatas.length; i++) {
-	                        properties[simpleDatas[i].getAttribute('name')] = nodeVal(simpleDatas[i]);
-	                    }
-	                }
-	                if (visibility) {
-	                    properties.visibility = nodeVal(visibility);
-	                }
-	                if (geomsAndTimes.coordTimes.length) {
-	                    properties.coordTimes = (geomsAndTimes.coordTimes.length === 1) ?
-	                        geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes;
-	                }
-	                var feature = {
-	                    type: 'Feature',
-	                    geometry: (geomsAndTimes.geoms.length === 1) ? geomsAndTimes.geoms[0] : {
-	                        type: 'GeometryCollection',
-	                        geometries: geomsAndTimes.geoms
-	                    },
-	                    properties: properties
-	                };
-	                if (attr(root, 'id')) { feature.id = attr(root, 'id'); }
-	                return [feature];
-	            }
-	            return gj;
-	        },
-	        gpx: function(doc) {
-	            var i,
-	                tracks = get(doc, 'trk'),
-	                routes = get(doc, 'rte'),
-	                waypoints = get(doc, 'wpt'),
-	                // a feature collection
-	                gj = fc(),
-	                feature;
-	            for (i = 0; i < tracks.length; i++) {
-	                feature = getTrack(tracks[i]);
-	                if (feature) { gj.features.push(feature); }
-	            }
-	            for (i = 0; i < routes.length; i++) {
-	                feature = getRoute(routes[i]);
-	                if (feature) { gj.features.push(feature); }
-	            }
-	            for (i = 0; i < waypoints.length; i++) {
-	                gj.features.push(getPoint(waypoints[i]));
-	            }
-	            function getPoints(node, pointname) {
-	                var pts = get(node, pointname),
-	                    line = [],
-	                    times = [],
-	                    heartRates = [],
-	                    l = pts.length;
-	                if (l < 2) { return {}; }  // Invalid line in GeoJSON
-	                for (var i = 0; i < l; i++) {
-	                    var c = coordPair(pts[i]);
-	                    line.push(c.coordinates);
-	                    if (c.time) { times.push(c.time); }
-	                    if (c.heartRate) { heartRates.push(c.heartRate); }
-	                }
-	                return {
-	                    line: line,
-	                    times: times,
-	                    heartRates: heartRates
-	                };
-	            }
-	            function getTrack(node) {
-	                var segments = get(node, 'trkseg'),
-	                    track = [],
-	                    times = [],
-	                    heartRates = [],
-	                    line;
-	                for (var i = 0; i < segments.length; i++) {
-	                    line = getPoints(segments[i], 'trkpt');
-	                    if (line) {
-	                        if (line.line) { track.push(line.line); }
-	                        if (line.times && line.times.length) { times.push(line.times); }
-	                        if (line.heartRates && line.heartRates.length) { heartRates.push(line.heartRates); }
-	                    }
-	                }
-	                if (track.length === 0) { return; }
-	                var properties = getProperties(node);
-	                extend(properties, getLineStyle(get1(node, 'extensions')));
-	                if (times.length) { properties.coordTimes = track.length === 1 ? times[0] : times; }
-	                if (heartRates.length) { properties.heartRates = track.length === 1 ? heartRates[0] : heartRates; }
-	                return {
-	                    type: 'Feature',
-	                    properties: properties,
-	                    geometry: {
-	                        type: track.length === 1 ? 'LineString' : 'MultiLineString',
-	                        coordinates: track.length === 1 ? track[0] : track
-	                    }
-	                };
-	            }
-	            function getRoute(node) {
-	                var line = getPoints(node, 'rtept');
-	                if (!line.line) { return; }
-	                var prop = getProperties(node);
-	                extend(prop, getLineStyle(get1(node, 'extensions')));
-	                var routeObj = {
-	                    type: 'Feature',
-	                    properties: prop,
-	                    geometry: {
-	                        type: 'LineString',
-	                        coordinates: line.line
-	                    }
-	                };
-	                return routeObj;
-	            }
-	            function getPoint(node) {
-	                var prop = getProperties(node);
-	                extend(prop, getMulti(node, ['sym']));
-	                return {
-	                    type: 'Feature',
-	                    properties: prop,
-	                    geometry: {
-	                        type: 'Point',
-	                        coordinates: coordPair(node).coordinates
-	                    }
-	                };
-	            }
-	            function getLineStyle(extensions) {
-	                var style = {};
-	                if (extensions) {
-	                    var lineStyle = get1(extensions, 'line');
-	                    if (lineStyle) {
-	                        var color = nodeVal(get1(lineStyle, 'color')),
-	                            opacity = parseFloat(nodeVal(get1(lineStyle, 'opacity'))),
-	                            width = parseFloat(nodeVal(get1(lineStyle, 'width')));
-	                        if (color) { style.stroke = color; }
-	                        if (!isNaN(opacity)) { style['stroke-opacity'] = opacity; }
-	                        // GPX width is in mm, convert to px with 96 px per inch
-	                        if (!isNaN(width)) { style['stroke-width'] = width * 96 / 25.4; }
-	                    }
-	                }
-	                return style;
-	            }
-	            function getProperties(node) {
-	                var prop = getMulti(node, ['name', 'cmt', 'desc', 'type', 'time', 'keywords']),
-	                    links = get(node, 'link');
-	                if (links.length) { prop.links = []; }
-	                for (var i = 0, link; i < links.length; i++) {
-	                    link = { href: attr(links[i], 'href') };
-	                    extend(link, getMulti(links[i], ['text', 'type']));
-	                    prop.links.push(link);
-	                }
-	                return prop;
-	            }
-	            return gj;
-	        }
-	    };
-	    return t;
-	})();
+	      context.surface().classed('nope', false).classed('nope-disabled', true);
+	    }
+	  }
 
-	{ module.exports = toGeoJSON; }
-	});
+	  function keyup(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope-suppressed')) {
+	        context.surface().classed('nope', true);
+	      }
 
-	var _initialized = false;
-	var _enabled = false;
-	var _geojson;
+	      context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+	    }
+	  }
+
+	  function allowsVertex(d) {
+	    return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+	  } // related code
+	  // - `mode/drag_node.js`     `doMove()`
+	  // - `behavior/draw.js`      `click()`
+	  // - `behavior/draw_way.js`  `move()`
 
 
-	function svgData(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var _showLabels = true;
-	    var detected = utilDetect();
-	    var layer = select(null);
-	    var _vtService;
-	    var _fileList;
-	    var _template;
-	    var _src;
+	  function move(d3_event, datum) {
+	    var loc = context.map().mouseCoordinates();
+	    if (!_drawNode) createDrawNode(loc);
+	    context.surface().classed('nope-disabled', d3_event.altKey);
+	    var targetLoc = datum && datum.properties && datum.properties.entity && allowsVertex(datum.properties.entity) && datum.properties.entity.loc;
+	    var targetNodes = datum && datum.properties && datum.properties.nodes;
 
+	    if (targetLoc) {
+	      // snap to node/vertex - a point target with `.loc`
+	      loc = targetLoc;
+	    } else if (targetNodes) {
+	      // snap to way - a line target with `.nodes`
+	      var choice = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, _drawNode.id);
 
-	    function init() {
-	        if (_initialized) { return; }  // run once
+	      if (choice) {
+	        loc = choice.loc;
+	      }
+	    }
 
-	        _geojson = {};
-	        _enabled = true;
+	    context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
+	    _drawNode = context.entity(_drawNode.id);
+	    checkGeometry(true
+	    /* includeDrawNode */
+	    );
+	  } // Check whether this edit causes the geometry to break.
+	  // If so, class the surface with a nope cursor.
+	  // `includeDrawNode` - Only check the relevant line segments if finishing drawing
 
-	        function over() {
-	            event.stopPropagation();
-	            event.preventDefault();
-	            event.dataTransfer.dropEffect = 'copy';
-	        }
 
-	        context.container()
-	            .attr('dropzone', 'copy')
-	            .on('drop.svgData', function() {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                if (!detected.filedrop) { return; }
-	                drawData.fileList(event.dataTransfer.files);
-	            })
-	            .on('dragenter.svgData', over)
-	            .on('dragexit.svgData', over)
-	            .on('dragover.svgData', over);
+	  function checkGeometry(includeDrawNode) {
+	    var nopeDisabled = context.surface().classed('nope-disabled');
+	    var isInvalid = isInvalidGeometry(includeDrawNode);
 
-	        _initialized = true;
+	    if (nopeDisabled) {
+	      context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+	    } else {
+	      context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
 	    }
+	  }
 
+	  function isInvalidGeometry(includeDrawNode) {
+	    var testNode = _drawNode; // we only need to test the single way we're drawing
 
-	    function getService() {
-	        if (services.vectorTile && !_vtService) {
-	            _vtService = services.vectorTile;
-	            _vtService.event.on('loadedData', throttledRedraw);
-	        } else if (!services.vectorTile && _vtService) {
-	            _vtService = null;
-	        }
+	    var parentWay = context.graph().entity(wayID);
+	    var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy
 
-	        return _vtService;
+	    if (includeDrawNode) {
+	      if (parentWay.isClosed()) {
+	        // don't test the last segment for closed ways - #4655
+	        // (still test the first segment)
+	        nodes.pop();
+	      }
+	    } else {
+	      // discount the draw node
+	      if (parentWay.isClosed()) {
+	        if (nodes.length < 3) return false;
+	        if (_drawNode) nodes.splice(-2, 1);
+	        testNode = nodes[nodes.length - 2];
+	      } else {
+	        // there's nothing we need to test if we ignore the draw node on open ways
+	        return false;
+	      }
 	    }
 
+	    return testNode && geoHasSelfIntersections(nodes, testNode.id);
+	  }
 
-	    function showLayer() {
-	        layerOn();
+	  function undone() {
+	    // undoing removed the temp edit
+	    _didResolveTempEdit = true;
+	    context.pauseChangeDispatch();
+	    var nextMode;
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
+	    if (context.graph() === startGraph) {
+	      // We've undone back to the initial state before we started drawing.
+	      // Just exit the draw mode without undoing whatever we did before
+	      // we entered the draw mode.
+	      nextMode = modeSelect(context, [wayID]);
+	    } else {
+	      // The `undo` only removed the temporary edit, so here we have to
+	      // manually undo to actually remove the last node we added. We can't
+	      // use the `undo` function since the initial "add" graph doesn't have
+	      // an annotation and so cannot be undone to.
+	      context.pop(1); // continue drawing
+
+	      nextMode = mode;
+	    } // clear the redo stack by adding and removing a blank edit
+
+
+	    context.perform(actionNoop());
+	    context.pop(1);
+	    context.resumeChangeDispatch();
+	    context.enter(nextMode);
+	  }
+
+	  function setActiveElements() {
+	    if (!_drawNode) return;
+	    context.surface().selectAll('.' + _drawNode.id).classed('active', true);
+	  }
+
+	  function resetToStartGraph() {
+	    while (context.graph() !== startGraph) {
+	      context.pop();
+	    }
+	  }
+
+	  var drawWay = function drawWay(surface) {
+	    _drawNode = undefined;
+	    _didResolveTempEdit = false;
+	    _origWay = context.entity(wayID);
+	    _headNodeID = typeof _nodeIndex === 'number' ? _origWay.nodes[_nodeIndex] : _origWay.isClosed() ? _origWay.nodes[_origWay.nodes.length - 2] : _origWay.nodes[_origWay.nodes.length - 1];
+	    _wayGeometry = _origWay.geometry(context.graph());
+	    _annotation = _t((_origWay.nodes.length === (_origWay.isClosed() ? 2 : 1) ? 'operations.start.annotation.' : 'operations.continue.annotation.') + _wayGeometry);
+	    _pointerHasMoved = false; // Push an annotated state for undo to return back to.
+	    // We must make sure to replace or remove it later.
+
+	    context.pauseChangeDispatch();
+	    context.perform(actionNoop(), _annotation);
+	    context.resumeChangeDispatch();
+	    behavior.hover().initialNodeID(_headNodeID);
+	    behavior.on('move', function () {
+	      _pointerHasMoved = true;
+	      move.apply(this, arguments);
+	    }).on('down', function () {
+	      move.apply(this, arguments);
+	    }).on('downcancel', function () {
+	      if (_drawNode) removeDrawNode();
+	    }).on('click', drawWay.add).on('clickWay', drawWay.addWay).on('clickNode', drawWay.addNode).on('undo', context.undo).on('cancel', drawWay.cancel).on('finish', drawWay.finish);
+	    select(window).on('keydown.drawWay', keydown).on('keyup.drawWay', keyup);
+	    context.map().dblclickZoomEnable(false).on('drawn.draw', setActiveElements);
+	    setActiveElements();
+	    surface.call(behavior);
+	    context.history().on('undone.draw', undone);
+	  };
+
+	  drawWay.off = function (surface) {
+	    if (!_didResolveTempEdit) {
+	      // Drawing was interrupted unexpectedly.
+	      // This can happen if the user changes modes,
+	      // clicks geolocate button, a hashchange event occurs, etc.
+	      context.pauseChangeDispatch();
+	      resetToStartGraph();
+	      context.resumeChangeDispatch();
+	    }
+
+	    _drawNode = undefined;
+	    _nodeIndex = undefined;
+	    context.map().on('drawn.draw', null);
+	    surface.call(behavior.off).selectAll('.active').classed('active', false);
+	    surface.classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false);
+	    select(window).on('keydown.drawWay', null).on('keyup.drawWay', null);
+	    context.history().on('undone.draw', null);
+	  };
+
+	  function attemptAdd(d, loc, doAdd) {
+	    if (_drawNode) {
+	      // move the node to the final loc in case move wasn't called
+	      // consistently (e.g. on touch devices)
+	      context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
+	      _drawNode = context.entity(_drawNode.id);
+	    } else {
+	      createDrawNode(loc);
 	    }
 
+	    checkGeometry(true
+	    /* includeDrawNode */
+	    );
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	    if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
+	      if (!_pointerHasMoved) {
+	        // prevent the temporary draw node from appearing on touch devices
+	        removeDrawNode();
+	      }
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', layerOff);
+	      dispatch$1.call('rejectedSelfIntersection', this);
+	      return; // can't click here
 	    }
 
+	    context.pauseChangeDispatch();
+	    doAdd(); // we just replaced the temporary edit with the real one
+
+	    _didResolveTempEdit = true;
+	    context.resumeChangeDispatch();
+	    context.enter(mode);
+	  } // Accept the current position of the drawing node
+
+
+	  drawWay.add = function (loc, d) {
+	    attemptAdd(d, loc, function () {// don't need to do anything extra
+	    });
+	  }; // Connect the way to an existing way
+
 
-	    function layerOn() {
-	        layer.style('display', 'block');
+	  drawWay.addWay = function (loc, edge, d) {
+	    attemptAdd(d, loc, function () {
+	      context.replace(actionAddMidpoint({
+	        loc: loc,
+	        edge: edge
+	      }, _drawNode), _annotation);
+	    });
+	  }; // Connect the way to an existing node
+
+
+	  drawWay.addNode = function (node, d) {
+	    // finish drawing if the mapper targets the prior node
+	    if (node.id === _headNodeID || // or the first node when drawing an area
+	    _origWay.isClosed() && node.id === _origWay.first()) {
+	      drawWay.finish();
+	      return;
 	    }
 
+	    attemptAdd(d, node.loc, function () {
+	      context.replace(function actionReplaceDrawNode(graph) {
+	        // remove the temporary draw node and insert the existing node
+	        // at the same index
+	        graph = graph.replace(graph.entity(wayID).removeNode(_drawNode.id)).remove(_drawNode);
+	        return graph.replace(graph.entity(wayID).addNode(node.id, _nodeIndex));
+	      }, _annotation);
+	    });
+	  }; // Finish the draw operation, removing the temporary edit.
+	  // If the way has enough nodes to be valid, it's selected.
+	  // Otherwise, delete everything and return to browse mode.
+
+
+	  drawWay.finish = function () {
+	    checkGeometry(false
+	    /* includeDrawNode */
+	    );
 
-	    function layerOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
+	    if (context.surface().classed('nope')) {
+	      dispatch$1.call('rejectedSelfIntersection', this);
+	      return; // can't click here
 	    }
 
+	    context.pauseChangeDispatch(); // remove the temporary edit
 
-	    // ensure that all geojson features in a collection have IDs
-	    function ensureIDs(gj) {
-	        if (!gj) { return null; }
+	    context.pop(1);
+	    _didResolveTempEdit = true;
+	    context.resumeChangeDispatch();
+	    var way = context.hasEntity(wayID);
 
-	        if (gj.type === 'FeatureCollection') {
-	            for (var i = 0; i < gj.features.length; i++) {
-	                ensureFeatureID(gj.features[i]);
-	            }
-	        } else {
-	            ensureFeatureID(gj);
-	        }
-	        return gj;
+	    if (!way || way.isDegenerate()) {
+	      drawWay.cancel();
+	      return;
 	    }
 
+	    window.setTimeout(function () {
+	      context.map().dblclickZoomEnable(true);
+	    }, 1000);
+	    var isNewFeature = !mode.isContinuing;
+	    context.enter(modeSelect(context, [wayID]).newFeature(isNewFeature));
+	  }; // Cancel the draw operation, delete everything, and return to browse mode.
 
-	    // ensure that each single Feature object has a unique ID
-	    function ensureFeatureID(feature) {
-	        if (!feature) { return; }
-	        feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
-	        return feature;
+
+	  drawWay.cancel = function () {
+	    context.pauseChangeDispatch();
+	    resetToStartGraph();
+	    context.resumeChangeDispatch();
+	    window.setTimeout(function () {
+	      context.map().dblclickZoomEnable(true);
+	    }, 1000);
+	    context.surface().classed('nope', false).classed('nope-disabled', false).classed('nope-suppressed', false);
+	    context.enter(modeBrowse(context));
+	  };
+
+	  drawWay.nodeIndex = function (val) {
+	    if (!arguments.length) return _nodeIndex;
+	    _nodeIndex = val;
+	    return drawWay;
+	  };
+
+	  drawWay.activeID = function () {
+	    if (!arguments.length) return _drawNode && _drawNode.id; // no assign
+
+	    return drawWay;
+	  };
+
+	  return utilRebind(drawWay, dispatch$1, 'on');
+	}
+
+	function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
+	  var mode = {
+	    button: button,
+	    id: 'draw-line'
+	  };
+	  var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawLine', function () {
+	    context.ui().flash.iconName('#iD-icon-no').label(_t('self_intersection.error.lines'))();
+	  });
+	  mode.wayID = wayID;
+	  mode.isContinuing = continuing;
+
+	  mode.enter = function () {
+	    behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
+	    context.install(behavior);
+	  };
+
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
+
+	  mode.selectedIDs = function () {
+	    return [wayID];
+	  };
+
+	  mode.activeID = function () {
+	    return behavior && behavior.activeID() || [];
+	  };
+
+	  return mode;
+	}
+
+	function operationContinue(context, selectedIDs) {
+	  var _entities = selectedIDs.map(function (id) {
+	    return context.graph().entity(id);
+	  });
+
+	  var _geometries = Object.assign({
+	    line: [],
+	    vertex: []
+	  }, utilArrayGroupBy(_entities, function (entity) {
+	    return entity.geometry(context.graph());
+	  }));
+
+	  var _vertex = _geometries.vertex.length && _geometries.vertex[0];
+
+	  function candidateWays() {
+	    return _vertex ? context.graph().parentWays(_vertex).filter(function (parent) {
+	      return parent.geometry(context.graph()) === 'line' && !parent.isClosed() && parent.affix(_vertex.id) && (_geometries.line.length === 0 || _geometries.line[0] === parent);
+	    }) : [];
+	  }
+
+	  var _candidates = candidateWays();
+
+	  var operation = function operation() {
+	    var candidate = _candidates[0];
+	    context.enter(modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(_vertex.id), true));
+	  };
+
+	  operation.relatedEntityIds = function () {
+	    return _candidates.length ? [_candidates[0].id] : [];
+	  };
+
+	  operation.available = function () {
+	    return _geometries.vertex.length === 1 && _geometries.line.length <= 1 && !context.features().hasHiddenConnections(_vertex, context.graph());
+	  };
+
+	  operation.disabled = function () {
+	    if (_candidates.length === 0) {
+	      return 'not_eligible';
+	    } else if (_candidates.length > 1) {
+	      return 'multiple';
 	    }
 
+	    return false;
+	  };
+
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
+	  };
 
-	    // Prefer an array of Features instead of a FeatureCollection
-	    function getFeatures(gj) {
-	        if (!gj) { return []; }
+	  operation.annotation = function () {
+	    return _t('operations.continue.annotation.line');
+	  };
 
-	        if (gj.type === 'FeatureCollection') {
-	            return gj.features;
-	        } else {
-	            return [gj];
-	        }
+	  operation.id = 'continue';
+	  operation.keys = [_t('operations.continue.key')];
+	  operation.title = _t('operations.continue.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
+
+	function operationCopy(context, selectedIDs) {
+	  function getFilteredIdsToCopy() {
+	    return selectedIDs.filter(function (selectedID) {
+	      var entity = context.graph().hasEntity(selectedID); // don't copy untagged vertices separately from ways
+
+	      return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
+	    });
+	  }
+
+	  var operation = function operation() {
+	    var graph = context.graph();
+	    var selected = groupEntities(getFilteredIdsToCopy(), graph);
+	    var canCopy = [];
+	    var skip = {};
+	    var entity;
+	    var i;
+
+	    for (i = 0; i < selected.relation.length; i++) {
+	      entity = selected.relation[i];
+
+	      if (!skip[entity.id] && entity.isComplete(graph)) {
+	        canCopy.push(entity.id);
+	        skip = getDescendants(entity.id, graph, skip);
+	      }
 	    }
 
+	    for (i = 0; i < selected.way.length; i++) {
+	      entity = selected.way[i];
 
-	    function featureKey(d) {
-	        return d.__featurehash__;
+	      if (!skip[entity.id]) {
+	        canCopy.push(entity.id);
+	        skip = getDescendants(entity.id, graph, skip);
+	      }
 	    }
 
+	    for (i = 0; i < selected.node.length; i++) {
+	      entity = selected.node[i];
 
-	    function isPolygon(d) {
-	        return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+	      if (!skip[entity.id]) {
+	        canCopy.push(entity.id);
+	      }
 	    }
 
+	    context.copyIDs(canCopy);
 
-	    function clipPathID(d) {
-	        return 'ideditor-data-' + d.__featurehash__ + '-clippath';
+	    if (_point && (canCopy.length !== 1 || graph.entity(canCopy[0]).type !== 'node')) {
+	      // store the anchor coordinates if copying more than a single node
+	      context.copyLonLat(context.projection.invert(_point));
+	    } else {
+	      context.copyLonLat(null);
 	    }
+	  };
+
+	  function groupEntities(ids, graph) {
+	    var entities = ids.map(function (id) {
+	      return graph.entity(id);
+	    });
+	    return Object.assign({
+	      relation: [],
+	      way: [],
+	      node: []
+	    }, utilArrayGroupBy(entities, 'type'));
+	  }
 
+	  function getDescendants(id, graph, descendants) {
+	    var entity = graph.entity(id);
+	    var children;
+	    descendants = descendants || {};
+
+	    if (entity.type === 'relation') {
+	      children = entity.members.map(function (m) {
+	        return m.id;
+	      });
+	    } else if (entity.type === 'way') {
+	      children = entity.nodes;
+	    } else {
+	      children = [];
+	    }
 
-	    function featureClasses(d) {
-	        return [
-	            'data' + d.__featurehash__,
-	            d.geometry.type,
-	            isPolygon(d) ? 'area' : '',
-	            d.__layerID__ || ''
-	        ].filter(Boolean).join(' ');
+	    for (var i = 0; i < children.length; i++) {
+	      if (!descendants[children[i]]) {
+	        descendants[children[i]] = true;
+	        descendants = getDescendants(children[i], graph, descendants);
+	      }
 	    }
 
+	    return descendants;
+	  }
 
-	    function drawData(selection) {
-	        var vtService = getService();
-	        var getPath = svgPath(projection).geojson;
-	        var getAreaPath = svgPath(projection, null, true).geojson;
-	        var hasData = drawData.hasData();
+	  operation.available = function () {
+	    return getFilteredIdsToCopy().length > 0;
+	  };
 
-	        layer = selection.selectAll('.layer-mapdata')
-	            .data(_enabled && hasData ? [0] : []);
+	  operation.disabled = function () {
+	    var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
 
-	        layer.exit()
-	            .remove();
+	    if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    }
 
-	        layer = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapdata')
-	            .merge(layer);
+	    return false;
+	  };
 
-	        var surface = context.surface();
-	        if (!surface || surface.empty()) { return; }  // not ready to draw yet, starting up
+	  operation.availableForKeypress = function () {
+	    var selection = window.getSelection && window.getSelection(); // if the user has text selected then let them copy that, not the selected feature
 
+	    return !selection || !selection.toString();
+	  };
 
-	        // Gather data
-	        var geoData, polygonData;
-	        if (_template && vtService) {   // fetch data from vector tile service
-	            var sourceID = _template;
-	            vtService.loadTiles(sourceID, _template, projection);
-	            geoData = vtService.data(sourceID, projection);
-	        } else {
-	            geoData = getFeatures(_geojson);
-	        }
-	        geoData = geoData.filter(getPath);
-	        polygonData = geoData.filter(isPolygon);
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.copy.' + disable, {
+	      n: selectedIDs.length
+	    }) : _t('operations.copy.description', {
+	      n: selectedIDs.length
+	    });
+	  };
+
+	  operation.annotation = function () {
+	    return _t('operations.copy.annotation', {
+	      n: selectedIDs.length
+	    });
+	  };
+
+	  var _point;
+
+	  operation.point = function (val) {
+	    _point = val;
+	    return operation;
+	  };
 
+	  operation.id = 'copy';
+	  operation.keys = [uiCmd('⌘C')];
+	  operation.title = _t('operations.copy.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        // Draw clip paths for polygons
-	        var clipPaths = surface.selectAll('defs').selectAll('.clipPath-data')
-	           .data(polygonData, featureKey);
+	function operationDisconnect(context, selectedIDs) {
+	  var _vertexIDs = [];
+	  var _wayIDs = [];
+	  var _otherIDs = [];
+	  var _actions = [];
+	  selectedIDs.forEach(function (id) {
+	    var entity = context.entity(id);
+
+	    if (entity.type === 'way') {
+	      _wayIDs.push(id);
+	    } else if (entity.geometry(context.graph()) === 'vertex') {
+	      _vertexIDs.push(id);
+	    } else {
+	      _otherIDs.push(id);
+	    }
+	  });
 
-	        clipPaths.exit()
-	           .remove();
+	  var _coords,
+	      _descriptionID = '',
+	      _annotationID = 'features';
 
-	        var clipPathsEnter = clipPaths.enter()
-	           .append('clipPath')
-	           .attr('class', 'clipPath-data')
-	           .attr('id', clipPathID);
+	  var _disconnectingVertexIds = [];
+	  var _disconnectingWayIds = [];
 
-	        clipPathsEnter
-	           .append('path');
+	  if (_vertexIDs.length > 0) {
+	    // At the selected vertices, disconnect the selected ways, if any, else
+	    // disconnect all connected ways
+	    _disconnectingVertexIds = _vertexIDs;
 
-	        clipPaths.merge(clipPathsEnter)
-	           .selectAll('path')
-	           .attr('d', getAreaPath);
+	    _vertexIDs.forEach(function (vertexID) {
+	      var action = actionDisconnect(vertexID);
 
+	      if (_wayIDs.length > 0) {
+	        var waysIDsForVertex = _wayIDs.filter(function (wayID) {
+	          var way = context.entity(wayID);
+	          return way.nodes.indexOf(vertexID) !== -1;
+	        });
 
-	        // Draw fill, shadow, stroke layers
-	        var datagroups = layer
-	            .selectAll('g.datagroup')
-	            .data(['fill', 'shadow', 'stroke']);
+	        action.limitWays(waysIDsForVertex);
+	      }
 
-	        datagroups = datagroups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'datagroup datagroup-' + d; })
-	            .merge(datagroups);
+	      _actions.push(action);
 
+	      _disconnectingWayIds = _disconnectingWayIds.concat(context.graph().parentWays(context.graph().entity(vertexID)).map(function (d) {
+	        return d.id;
+	      }));
+	    });
 
-	        // Draw paths
-	        var pathData = {
-	            fill: polygonData,
-	            shadow: geoData,
-	            stroke: geoData
-	        };
+	    _disconnectingWayIds = utilArrayUniq(_disconnectingWayIds).filter(function (id) {
+	      return _wayIDs.indexOf(id) === -1;
+	    });
+	    _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
 
-	        var paths = datagroups
-	            .selectAll('path')
-	            .data(function(layer) { return pathData[layer]; }, featureKey);
-
-	        // exit
-	        paths.exit()
-	            .remove();
-
-	        // enter/update
-	        paths = paths.enter()
-	            .append('path')
-	            .attr('class', function(d) {
-	                var datagroup = this.parentNode.__data__;
-	                return 'pathdata ' + datagroup + ' ' + featureClasses(d);
-	            })
-	            .attr('clip-path', function(d) {
-	                var datagroup = this.parentNode.__data__;
-	                return datagroup === 'fill' ? ('url(#' + clipPathID(d) + ')') : null;
-	            })
-	            .merge(paths)
-	            .attr('d', function(d) {
-	                var datagroup = this.parentNode.__data__;
-	                return datagroup === 'fill' ? getAreaPath(d) : getPath(d);
-	            });
+	    if (_wayIDs.length === 1) {
+	      _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
+	    } else {
+	      _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';
+	    }
+	  } else if (_wayIDs.length > 0) {
+	    // Disconnect the selected ways from each other, if they're connected,
+	    // else disconnect them from all connected ways
+	    var ways = _wayIDs.map(function (id) {
+	      return context.entity(id);
+	    });
 
+	    var nodes = utilGetAllNodes(_wayIDs, context.graph());
+	    _coords = nodes.map(function (n) {
+	      return n.loc;
+	    }); // actions for connected nodes shared by at least two selected ways
 
-	        // Draw labels
-	        layer
-	            .call(drawLabels, 'label-halo', geoData)
-	            .call(drawLabels, 'label', geoData);
+	    var sharedActions = [];
+	    var sharedNodes = []; // actions for connected nodes
 
+	    var unsharedActions = [];
+	    var unsharedNodes = [];
+	    nodes.forEach(function (node) {
+	      var action = actionDisconnect(node.id).limitWays(_wayIDs);
 
-	        function drawLabels(selection, textClass, data) {
-	            var labelPath = d3_geoPath(projection);
-	            var labelData = data.filter(function(d) {
-	                return _showLabels && d.properties && (d.properties.desc || d.properties.name);
-	            });
+	      if (action.disabled(context.graph()) !== 'not_connected') {
+	        var count = 0;
 
-	            var labels = selection.selectAll('text.' + textClass)
-	                .data(labelData, featureKey);
+	        for (var i in ways) {
+	          var way = ways[i];
 
-	            // exit
-	            labels.exit()
-	                .remove();
+	          if (way.nodes.indexOf(node.id) !== -1) {
+	            count += 1;
+	          }
 
-	            // enter/update
-	            labels = labels.enter()
-	                .append('text')
-	                .attr('class', function(d) { return textClass + ' ' + featureClasses(d); })
-	                .merge(labels)
-	                .text(function(d) {
-	                    return d.properties.desc || d.properties.name;
-	                })
-	                .attr('x', function(d) {
-	                    var centroid = labelPath.centroid(d);
-	                    return centroid[0] + 11;
-	                })
-	                .attr('y', function(d) {
-	                    var centroid = labelPath.centroid(d);
-	                    return centroid[1];
-	                });
+	          if (count > 1) break;
+	        }
+
+	        if (count > 1) {
+	          sharedActions.push(action);
+	          sharedNodes.push(node);
+	        } else {
+	          unsharedActions.push(action);
+	          unsharedNodes.push(node);
 	        }
+	      }
+	    });
+	    _descriptionID += 'no_points.';
+	    _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
+
+	    if (sharedActions.length) {
+	      // if any nodes are shared, only disconnect the selected ways from each other
+	      _actions = sharedActions;
+	      _disconnectingVertexIds = sharedNodes.map(function (node) {
+	        return node.id;
+	      });
+	      _descriptionID += 'conjoined';
+	      _annotationID = 'from_each_other';
+	    } else {
+	      // if no nodes are shared, disconnect the selected ways from all connected ways
+	      _actions = unsharedActions;
+	      _disconnectingVertexIds = unsharedNodes.map(function (node) {
+	        return node.id;
+	      });
+
+	      if (_wayIDs.length === 1) {
+	        _descriptionID += context.graph().geometry(_wayIDs[0]);
+	      } else {
+	        _descriptionID += 'separate';
+	      }
 	    }
+	  }
 
+	  var _extent = utilTotalExtent(_disconnectingVertexIds, context.graph());
 
-	    function getExtension(fileName) {
-	        if (!fileName) { return; }
+	  var operation = function operation() {
+	    context.perform(function (graph) {
+	      return _actions.reduce(function (graph, action) {
+	        return action(graph);
+	      }, graph);
+	    }, operation.annotation());
+	    context.validator().validate();
+	  };
 
-	        var re = /\.(gpx|kml|(geo)?json)$/i;
-	        var match = fileName.toLowerCase().match(re);
-	        return match && match.length && match[0];
+	  operation.relatedEntityIds = function () {
+	    if (_vertexIDs.length) {
+	      return _disconnectingWayIds;
 	    }
 
+	    return _disconnectingVertexIds;
+	  };
+
+	  operation.available = function () {
+	    if (_actions.length === 0) return false;
+	    if (_otherIDs.length !== 0) return false;
+	    if (_vertexIDs.length !== 0 && _wayIDs.length !== 0 && !_wayIDs.every(function (wayID) {
+	      return _vertexIDs.some(function (vertexID) {
+	        var way = context.entity(wayID);
+	        return way.nodes.indexOf(vertexID) !== -1;
+	      });
+	    })) return false;
+	    return true;
+	  };
+
+	  operation.disabled = function () {
+	    var reason;
 
-	    function xmlToDom(textdata) {
-	        return (new DOMParser()).parseFromString(textdata, 'text/xml');
+	    for (var actionIndex in _actions) {
+	      reason = _actions[actionIndex].disabled(context.graph());
+	      if (reason) return reason;
 	    }
 
+	    if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large.' + ((_vertexIDs.length ? _vertexIDs : _wayIDs).length === 1 ? 'single' : 'multiple');
+	    } else if (_coords && someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
 
-	    drawData.setFile = function(extension, data) {
-	        _template = null;
-	        _fileList = null;
-	        _geojson = null;
-	        _src = null;
+	    return false;
 
-	        var gj;
-	        switch (extension) {
-	            case '.gpx':
-	                gj = togeojson.gpx(xmlToDom(data));
-	                break;
-	            case '.kml':
-	                gj = togeojson.kml(xmlToDom(data));
-	                break;
-	            case '.geojson':
-	            case '.json':
-	                gj = JSON.parse(data);
-	                break;
-	        }
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
+
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	        gj = gj || {};
-	        if (Object.keys(gj).length) {
-	            _geojson = ensureIDs(gj);
-	            _src = extension + ' data file';
-	            this.fitZoom();
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
 	        }
+	      }
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	      return false;
+	    }
+	  };
 
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
 
-	    drawData.showLabels = function(val) {
-	        if (!arguments.length) { return _showLabels; }
+	    if (disable) {
+	      return _t('operations.disconnect.' + disable);
+	    }
 
-	        _showLabels = val;
-	        return this;
-	    };
+	    return _t('operations.disconnect.description.' + _descriptionID);
+	  };
+
+	  operation.annotation = function () {
+	    return _t('operations.disconnect.annotation.' + _annotationID);
+	  };
+
+	  operation.id = 'disconnect';
+	  operation.keys = [_t('operations.disconnect.key')];
+	  operation.title = _t('operations.disconnect.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
+
+	function operationDowngrade(context, selectedIDs) {
+	  var _affectedFeatureCount = 0;
+
+	  var _downgradeType = downgradeTypeForEntityIDs(selectedIDs);
 
+	  var _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';
 
-	    drawData.enabled = function(val) {
-	        if (!arguments.length) { return _enabled; }
+	  function downgradeTypeForEntityIDs(entityIds) {
+	    var downgradeType;
+	    _affectedFeatureCount = 0;
+
+	    for (var i in entityIds) {
+	      var entityID = entityIds[i];
+	      var type = downgradeTypeForEntityID(entityID);
 
-	        _enabled = val;
-	        if (_enabled) {
-	            showLayer();
+	      if (type) {
+	        _affectedFeatureCount += 1;
+
+	        if (downgradeType && type !== downgradeType) {
+	          if (downgradeType !== 'generic' && type !== 'generic') {
+	            downgradeType = 'building_address';
+	          } else {
+	            downgradeType = 'generic';
+	          }
 	        } else {
-	            hideLayer();
+	          downgradeType = type;
 	        }
+	      }
+	    }
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	    return downgradeType;
+	  }
 
+	  function downgradeTypeForEntityID(entityID) {
+	    var graph = context.graph();
+	    var entity = graph.entity(entityID);
+	    var preset = _mainPresetIndex.match(entity, graph);
+	    if (!preset || preset.isFallback()) return null;
 
-	    drawData.hasData = function() {
-	        var gj = _geojson || {};
-	        return !!(_template || Object.keys(gj).length);
-	    };
+	    if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
+	      return key.match(/^addr:.{1,}/);
+	    })) {
+	      return 'address';
+	    }
 
+	    var geometry = entity.geometry(graph);
 
-	    drawData.template = function(val, src) {
-	        if (!arguments.length) { return _template; }
+	    if (geometry === 'area' && entity.tags.building && !preset.tags.building) {
+	      return 'building';
+	    }
 
-	        // test source against OSM imagery blacklists..
-	        var osm = context.connection();
-	        if (osm) {
-	            var blacklists = osm.imageryBlacklists();
-	            var fail = false;
-	            var tested = 0;
-	            var regex;
+	    if (geometry === 'vertex' && Object.keys(entity.tags).length) {
+	      return 'generic';
+	    }
 
-	            for (var i = 0; i < blacklists.length; i++) {
-	                try {
-	                    regex = new RegExp(blacklists[i]);
-	                    fail = regex.test(val);
-	                    tested++;
-	                    if (fail) { break; }
-	                } catch (e) {
-	                    /* noop */
-	                }
-	            }
+	    return null;
+	  }
 
-	            // ensure at least one test was run.
-	            if (!tested) {
-	                regex = new RegExp('.*\.google(apis)?\..*/(vt|kh)[\?/].*([xyz]=.*){3}.*');
-	                fail = regex.test(val);
-	            }
-	        }
+	  var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
+	  var addressKeysToKeep = ['source'];
 
-	        _template = val;
-	        _fileList = null;
-	        _geojson = null;
+	  var operation = function operation() {
+	    context.perform(function (graph) {
+	      for (var i in selectedIDs) {
+	        var entityID = selectedIDs[i];
+	        var type = downgradeTypeForEntityID(entityID);
+	        if (!type) continue;
+	        var tags = Object.assign({}, graph.entity(entityID).tags); // shallow copy
 
-	        // strip off the querystring/hash from the template,
-	        // it often includes the access token
-	        _src = src || ('vectortile:' + val.split(/[?#]/)[0]);
+	        for (var key in tags) {
+	          if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) continue;
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	          if (type === 'building') {
+	            if (buildingKeysToKeep.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+	          }
 
+	          if (type !== 'generic' && key.match(/^addr:.{1,}/)) continue;
+	          delete tags[key];
+	        }
 
-	    drawData.geojson = function(gj, src) {
-	        if (!arguments.length) { return _geojson; }
+	        graph = actionChangeTags(entityID, tags)(graph);
+	      }
 
-	        _template = null;
-	        _fileList = null;
-	        _geojson = null;
-	        _src = null;
+	      return graph;
+	    }, operation.annotation());
+	    context.validator().validate(); // refresh the select mode to enable the delete operation
 
-	        gj = gj || {};
-	        if (Object.keys(gj).length) {
-	            _geojson = ensureIDs(gj);
-	            _src = src || 'unknown.geojson';
-	        }
+	    context.enter(modeSelect(context, selectedIDs));
+	  };
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	  operation.available = function () {
+	    return _downgradeType;
+	  };
 
+	  operation.disabled = function () {
+	    if (selectedIDs.some(hasWikidataTag)) {
+	      return 'has_wikidata_tag';
+	    }
 
-	    drawData.fileList = function(fileList) {
-	        if (!arguments.length) { return _fileList; }
+	    return false;
 
-	        _template = null;
-	        _fileList = fileList;
-	        _geojson = null;
-	        _src = null;
+	    function hasWikidataTag(id) {
+	      var entity = context.entity(id);
+	      return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+	    }
+	  };
 
-	        if (!fileList || !fileList.length) { return this; }
-	        var f = fileList[0];
-	        var extension = getExtension(f.name);
-	        var reader = new FileReader();
-	        reader.onload = (function() {
-	            return function(e) {
-	                drawData.setFile(extension, e.target.result);
-	            };
-	        })();
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
+	  };
 
-	        reader.readAsText(f);
+	  operation.annotation = function () {
+	    var suffix;
 
-	        return this;
-	    };
+	    if (_downgradeType === 'building_address') {
+	      suffix = 'generic';
+	    } else {
+	      suffix = _downgradeType;
+	    }
 
+	    return _t('operations.downgrade.annotation.' + suffix, {
+	      n: _affectedFeatureCount
+	    });
+	  };
 
-	    drawData.url = function(url, defaultExtension) {
-	        _template = null;
-	        _fileList = null;
-	        _geojson = null;
-	        _src = null;
-
-	        // strip off any querystring/hash from the url before checking extension
-	        var testUrl = url.split(/[?#]/)[0];
-	        var extension = getExtension(testUrl) || defaultExtension;
-	        if (extension) {
-	            _template = null;
-	            d3_text(url)
-	                .then(function(data) {
-	                    drawData.setFile(extension, data);
-	                })
-	                .catch(function() {
-	                    /* ignore */
-	                });
+	  operation.id = 'downgrade';
+	  operation.keys = [uiCmd('⌫')];
+	  operation.title = _t('operations.downgrade.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        } else {
-	            drawData.template(url);
-	        }
+	function operationExtract(context, selectedIDs) {
+	  var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
 
-	        return this;
-	    };
+	  var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
+	    return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
+	  }).filter(Boolean));
 
+	  var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
 
-	    drawData.getSrc = function() {
-	        return _src || '';
-	    };
+	  var _extent;
+
+	  var _actions = selectedIDs.map(function (entityID) {
+	    var graph = context.graph();
+	    var entity = graph.hasEntity(entityID);
+	    if (!entity || !entity.hasInterestingTags()) return null;
+	    if (entity.type === 'node' && graph.parentWays(entity).length === 0) return null;
 
+	    if (entity.type !== 'node') {
+	      var preset = _mainPresetIndex.match(entity, graph); // only allow extraction from ways/relations if the preset supports points
 
-	    drawData.fitZoom = function() {
-	        var features = getFeatures(_geojson);
-	        if (!features.length) { return; }
-
-	        var map = context.map();
-	        var viewport = map.trimmedExtent().polygon();
-	        var coords = features.reduce(function(coords, feature) {
-	            var geom = feature.geometry;
-	            if (!geom) { return coords; }
-
-	            var c = geom.coordinates;
-
-	            /* eslint-disable no-fallthrough */
-	            switch (geom.type) {
-	                case 'Point':
-	                    c = [c];
-	                case 'MultiPoint':
-	                case 'LineString':
-	                    break;
-
-	                case 'MultiPolygon':
-	                    c = utilArrayFlatten(c);
-	                case 'Polygon':
-	                case 'MultiLineString':
-	                    c = utilArrayFlatten(c);
-	                    break;
-	            }
-	            /* eslint-enable no-fallthrough */
+	      if (preset.geometry.indexOf('point') === -1) return null;
+	    }
 
-	            return utilArrayUnion(coords, c);
-	        }, []);
+	    _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+	    return actionExtract(entityID);
+	  }).filter(Boolean);
 
-	        if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
-	            var extent = geoExtent(d3_geoBounds({ type: 'LineString', coordinates: coords }));
-	            map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
-	        }
+	  var operation = function operation() {
+	    var combinedAction = function combinedAction(graph) {
+	      _actions.forEach(function (action) {
+	        graph = action(graph);
+	      });
 
-	        return this;
+	      return graph;
 	    };
 
+	    context.perform(combinedAction, operation.annotation()); // do the extract
 
-	    init();
-	    return drawData;
-	}
+	    var extractedNodeIDs = _actions.map(function (action) {
+	      return action.getExtractedNodeID();
+	    });
 
-	function svgDebug(projection, context) {
+	    context.enter(modeSelect(context, extractedNodeIDs));
+	  };
 
-	  function drawDebug(selection) {
-	    var showTile = context.getDebug('tile');
-	    var showCollision = context.getDebug('collision');
-	    var showImagery = context.getDebug('imagery');
-	    var showTouchTargets = context.getDebug('target');
-	    var showDownloaded = context.getDebug('downloaded');
+	  operation.available = function () {
+	    return _actions.length && selectedIDs.length === _actions.length;
+	  };
 
-	    var debugData = [];
-	    if (showTile) {
-	      debugData.push({ class: 'red', label: 'tile' });
+	  operation.disabled = function () {
+	    if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (selectedIDs.some(function (entityID) {
+	      return context.graph().geometry(entityID) === 'vertex' && context.hasHiddenConnections(entityID);
+	    })) {
+	      return 'connected_to_hidden';
 	    }
-	    if (showCollision) {
-	      debugData.push({ class: 'yellow', label: 'collision' });
+
+	    return false;
+	  };
+
+	  operation.tooltip = function () {
+	    var disableReason = operation.disabled();
+
+	    if (disableReason) {
+	      return _t('operations.extract.' + disableReason + '.' + _amount);
+	    } else {
+	      return _t('operations.extract.description.' + _geometryID + '.' + _amount);
 	    }
-	    if (showImagery) {
-	      debugData.push({ class: 'orange', label: 'imagery' });
+	  };
+
+	  operation.annotation = function () {
+	    return _t('operations.extract.annotation', {
+	      n: selectedIDs.length
+	    });
+	  };
+
+	  operation.id = 'extract';
+	  operation.keys = [_t('operations.extract.key')];
+	  operation.title = _t('operations.extract.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
+
+	function operationMerge(context, selectedIDs) {
+	  var _action = getAction();
+
+	  function getAction() {
+	    // prefer a non-disabled action first
+	    var join = actionJoin(selectedIDs);
+	    if (!join.disabled(context.graph())) return join;
+	    var merge = actionMerge(selectedIDs);
+	    if (!merge.disabled(context.graph())) return merge;
+	    var mergePolygon = actionMergePolygon(selectedIDs);
+	    if (!mergePolygon.disabled(context.graph())) return mergePolygon;
+	    var mergeNodes = actionMergeNodes(selectedIDs);
+	    if (!mergeNodes.disabled(context.graph())) return mergeNodes; // otherwise prefer an action with an interesting disabled reason
+
+	    if (join.disabled(context.graph()) !== 'not_eligible') return join;
+	    if (merge.disabled(context.graph()) !== 'not_eligible') return merge;
+	    if (mergePolygon.disabled(context.graph()) !== 'not_eligible') return mergePolygon;
+	    return mergeNodes;
+	  }
+
+	  var operation = function operation() {
+	    if (operation.disabled()) return;
+	    context.perform(_action, operation.annotation());
+	    context.validator().validate();
+	    var resultIDs = selectedIDs.filter(context.hasEntity);
+
+	    if (resultIDs.length > 1) {
+	      var interestingIDs = resultIDs.filter(function (id) {
+	        return context.entity(id).hasInterestingTags();
+	      });
+	      if (interestingIDs.length) resultIDs = interestingIDs;
 	    }
-	    if (showTouchTargets) {
-	      debugData.push({ class: 'pink', label: 'touchTargets' });
+
+	    context.enter(modeSelect(context, resultIDs));
+	  };
+
+	  operation.available = function () {
+	    return selectedIDs.length >= 2;
+	  };
+
+	  operation.disabled = function () {
+	    var actionDisabled = _action.disabled(context.graph());
+
+	    if (actionDisabled) return actionDisabled;
+	    var osm = context.connection();
+
+	    if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
+	      return 'too_many_vertices';
 	    }
-	    if (showDownloaded) {
-	      debugData.push({ class: 'purple', label: 'downloaded' });
+
+	    return false;
+	  };
+
+	  operation.tooltip = function () {
+	    var disabled = operation.disabled();
+
+	    if (disabled) {
+	      if (disabled === 'restriction') {
+	        return _t('operations.merge.restriction', {
+	          relation: _mainPresetIndex.item('type/restriction').name()
+	        });
+	      }
+
+	      return _t('operations.merge.' + disabled);
 	    }
 
+	    return _t('operations.merge.description');
+	  };
+
+	  operation.annotation = function () {
+	    return _t('operations.merge.annotation', {
+	      n: selectedIDs.length
+	    });
+	  };
+
+	  operation.id = 'merge';
+	  operation.keys = [_t('operations.merge.key')];
+	  operation.title = _t('operations.merge.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
+
+	function operationPaste(context) {
+	  var _pastePoint;
+
+	  var operation = function operation() {
+	    if (!_pastePoint) return;
+	    var oldIDs = context.copyIDs();
+	    if (!oldIDs.length) return;
+	    var projection = context.projection;
+	    var extent = geoExtent();
+	    var oldGraph = context.copyGraph();
+	    var newIDs = [];
+	    var action = actionCopyEntities(oldIDs, oldGraph);
+	    context.perform(action);
+	    var copies = action.copies();
+	    var originals = new Set();
+	    Object.values(copies).forEach(function (entity) {
+	      originals.add(entity.id);
+	    });
 
-	    var legend = context.container().select('.main-content')
-	      .selectAll('.debug-legend')
-	      .data(debugData.length ? [0] : []);
+	    for (var id in copies) {
+	      var oldEntity = oldGraph.entity(id);
+	      var newEntity = copies[id];
 
-	    legend.exit()
-	      .remove();
+	      extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-	    legend = legend.enter()
-	      .append('div')
-	      .attr('class', 'fillD debug-legend')
-	      .merge(legend);
 
+	      var parents = context.graph().parentWays(newEntity);
+	      var parentCopied = parents.some(function (parent) {
+	        return originals.has(parent.id);
+	      });
 
-	    var legendItems = legend.selectAll('.debug-legend-item')
-	      .data(debugData, function (d) { return d.label; });
+	      if (!parentCopied) {
+	        newIDs.push(newEntity.id);
+	      }
+	    } // Use the location of the copy operation to offset the paste location,
+	    // or else use the center of the pasted extent
 
-	    legendItems.exit()
-	      .remove();
 
-	    legendItems.enter()
-	      .append('span')
-	      .attr('class', function (d) { return ("debug-legend-item " + (d.class)); })
-	      .text(function (d) { return d.label; });
+	    var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
+	    var delta = geoVecSubtract(_pastePoint, copyPoint); // Move the pasted objects to be anchored at the paste location
 
+	    context.replace(actionMove(newIDs, delta, projection), operation.annotation());
+	    context.enter(modeSelect(context, newIDs));
+	  };
 
-	    var layer = selection.selectAll('.layer-debug')
-	      .data(showImagery || showDownloaded ? [0] : []);
+	  operation.point = function (val) {
+	    _pastePoint = val;
+	    return operation;
+	  };
 
-	    layer.exit()
-	      .remove();
+	  operation.available = function () {
+	    return context.mode().id === 'browse';
+	  };
 
-	    layer = layer.enter()
-	      .append('g')
-	      .attr('class', 'layer-debug')
-	      .merge(layer);
+	  operation.disabled = function () {
+	    return !context.copyIDs().length;
+	  };
 
+	  operation.tooltip = function () {
+	    var oldGraph = context.copyGraph();
+	    var ids = context.copyIDs();
 
-	    // imagery
-	    var extent = context.map().extent();
-	    _mainFileFetcher.get('imagery')
-	      .then(function (d) {
-	        var hits = (showImagery && d.query.bbox(extent.rectangle(), true)) || [];
-	        var features = hits.map(function (d) { return d.features[d.id]; });
+	    if (!ids.length) {
+	      return _t('operations.paste.nothing_copied');
+	    }
 
-	        var imagery = layer.selectAll('path.debug-imagery')
-	          .data(features);
+	    return _t('operations.paste.description', {
+	      feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
+	      n: ids.length
+	    });
+	  };
 
-	        imagery.exit()
-	          .remove();
+	  operation.annotation = function () {
+	    var ids = context.copyIDs();
+	    return _t('operations.paste.annotation', {
+	      n: ids.length
+	    });
+	  };
 
-	        imagery.enter()
-	          .append('path')
-	          .attr('class', 'debug-imagery debug orange');
-	      })
-	      .catch(function () { /* ignore */ });
+	  operation.id = 'paste';
+	  operation.keys = [uiCmd('⌘V')];
+	  operation.title = _t('operations.paste.title');
+	  return operation;
+	}
 
-	    // downloaded
-	    var osm = context.connection();
-	    var dataDownloaded = [];
-	    if (osm && showDownloaded) {
-	      var rtree = osm.caches('get').tile.rtree;
-	      dataDownloaded = rtree.all().map(function (bbox) {
-	        return {
-	          type: 'Feature',
-	          properties: { id: bbox.id },
-	          geometry: {
-	            type: 'Polygon',
-	            coordinates: [[
-	              [ bbox.minX, bbox.minY ],
-	              [ bbox.minX, bbox.maxY ],
-	              [ bbox.maxX, bbox.maxY ],
-	              [ bbox.maxX, bbox.minY ],
-	              [ bbox.minX, bbox.minY ]
-	            ]]
-	          }
-	        };
+	function operationReverse(context, selectedIDs) {
+	  var operation = function operation() {
+	    context.perform(function combinedReverseAction(graph) {
+	      actions().forEach(function (action) {
+	        graph = action(graph);
 	      });
-	    }
+	      return graph;
+	    }, operation.annotation());
+	    context.validator().validate();
+	  };
 
-	    var downloaded = layer
-	      .selectAll('path.debug-downloaded')
-	      .data(showDownloaded ? dataDownloaded : []);
+	  function actions(situation) {
+	    return selectedIDs.map(function (entityID) {
+	      var entity = context.hasEntity(entityID);
+	      if (!entity) return null;
 
-	    downloaded.exit()
-	      .remove();
+	      if (situation === 'toolbar') {
+	        if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
+	      }
 
-	    downloaded.enter()
-	      .append('path')
-	      .attr('class', 'debug-downloaded debug purple');
+	      var geometry = entity.geometry(context.graph());
+	      if (entity.type !== 'node' && geometry !== 'line') return null;
+	      var action = actionReverse(entityID);
+	      if (action.disabled(context.graph())) return null;
+	      return action;
+	    }).filter(Boolean);
+	  }
 
-	    // update
-	    layer.selectAll('path')
-	      .attr('d', svgPath(projection).geojson);
+	  function reverseTypeID() {
+	    var acts = actions();
+	    var nodeActionCount = acts.filter(function (act) {
+	      var entity = context.hasEntity(act.entityID());
+	      return entity && entity.type === 'node';
+	    }).length;
+	    if (nodeActionCount === 0) return 'line';
+	    if (nodeActionCount === acts.length) return 'point';
+	    return 'feature';
 	  }
 
+	  operation.available = function (situation) {
+	    return actions(situation).length > 0;
+	  };
 
-	  // This looks strange because `enabled` methods on other layers are
-	  // chainable getter/setters, and this one is just a getter.
-	  drawDebug.enabled = function() {
-	    if (!arguments.length) {
-	      return context.getDebug('tile') ||
-	        context.getDebug('collision') ||
-	        context.getDebug('imagery') ||
-	        context.getDebug('target') ||
-	        context.getDebug('downloaded');
-	    } else {
-	        return this;
-	    }
+	  operation.disabled = function () {
+	    return false;
 	  };
 
+	  operation.tooltip = function () {
+	    return _t('operations.reverse.description.' + reverseTypeID());
+	  };
 
-	  return drawDebug;
+	  operation.annotation = function () {
+	    var acts = actions();
+	    return _t('operations.reverse.annotation.' + reverseTypeID(), {
+	      n: acts.length
+	    });
+	  };
+
+	  operation.id = 'reverse';
+	  operation.keys = [_t('operations.reverse.key')];
+	  operation.title = _t('operations.reverse.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	var _layerEnabled = false;
-	var _qaService;
+	function operationSplit(context, selectedIDs) {
+	  var _vertexIds = selectedIDs.filter(function (id) {
+	    return context.graph().geometry(id) === 'vertex';
+	  });
 
-	function svgKeepRight(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-	  var minZoom = 12;
+	  var _selectedWayIds = selectedIDs.filter(function (id) {
+	    var entity = context.graph().hasEntity(id);
+	    return entity && entity.type === 'way';
+	  });
 
-	  var touchLayer = select(null);
-	  var drawLayer = select(null);
-	  var layerVisible = false;
+	  var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;
 
-	  function markerPath(selection, klass) {
-	    selection
-	      .attr('class', klass)
-	      .attr('transform', 'translate(-4, -24)')
-	      .attr('d', 'M11.6,6.2H7.1l1.4-5.1C8.6,0.6,8.1,0,7.5,0H2.2C1.7,0,1.3,0.3,1.3,0.8L0,10.2c-0.1,0.6,0.4,1.1,0.9,1.1h4.6l-1.8,7.6C3.6,19.4,4.1,20,4.7,20c0.3,0,0.6-0.2,0.8-0.5l6.9-11.9C12.7,7,12.3,6.2,11.6,6.2z');
-	  }
+	  var _action = actionSplit(_vertexIds);
 
-	  // Loosely-coupled keepRight service for fetching issues.
-	  function getService() {
-	    if (services.keepRight && !_qaService) {
-	      _qaService = services.keepRight;
-	      _qaService.on('loaded', throttledRedraw);
-	    } else if (!services.keepRight && _qaService) {
-	      _qaService = null;
-	    }
+	  var _ways = [];
+	  var _geometry = 'feature';
+	  var _waysAmount = 'single';
 
-	    return _qaService;
-	  }
+	  var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';
 
-	  // Show the markers
-	  function editOn() {
-	    if (!layerVisible) {
-	      layerVisible = true;
-	      drawLayer
-	        .style('display', 'block');
+	  if (_isAvailable) {
+	    if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
+	    _ways = _action.ways(context.graph());
+	    var geometries = {};
+
+	    _ways.forEach(function (way) {
+	      geometries[way.geometry(context.graph())] = true;
+	    });
+
+	    if (Object.keys(geometries).length === 1) {
+	      _geometry = Object.keys(geometries)[0];
 	    }
+
+	    _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
 	  }
 
-	  // Immediately remove the markers and their touch targets
-	  function editOff() {
-	    if (layerVisible) {
-	      layerVisible = false;
-	      drawLayer
-	        .style('display', 'none');
-	      drawLayer.selectAll('.qaItem.keepRight')
-	        .remove();
-	      touchLayer.selectAll('.qaItem.keepRight')
-	        .remove();
+	  var operation = function operation() {
+	    var difference = context.perform(_action, operation.annotation()); // select both the nodes and the ways so the mapper can immediately disconnect them if desired
+
+	    var idsToSelect = _vertexIds.concat(difference.extantIDs().filter(function (id) {
+	      // filter out relations that may have had member additions
+	      return context.entity(id).type === 'way';
+	    }));
+
+	    context.enter(modeSelect(context, idsToSelect));
+	  };
+
+	  operation.relatedEntityIds = function () {
+	    return _selectedWayIds.length ? [] : _ways.map(function (way) {
+	      return way.id;
+	    });
+	  };
+
+	  operation.available = function () {
+	    return _isAvailable;
+	  };
+
+	  operation.disabled = function () {
+	    var reason = _action.disabled(context.graph());
+
+	    if (reason) {
+	      return reason;
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
 	    }
-	  }
 
-	  // Enable the layer.  This shows the markers and transitions them to visible.
-	  function layerOn() {
-	    editOn();
+	    return false;
+	  };
 
-	    drawLayer
-	      .style('opacity', 0)
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 1)
-	      .on('end interrupt', function () { return dispatch.call('change'); });
-	  }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    if (disable) return _t('operations.split.' + disable);
+	    return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
+	  };
 
-	  // Disable the layer.  This transitions the layer invisible and then hides the markers.
-	  function layerOff() {
-	    throttledRedraw.cancel();
-	    drawLayer.interrupt();
-	    touchLayer.selectAll('.qaItem.keepRight')
-	      .remove();
-
-	    drawLayer
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 0)
-	      .on('end interrupt', function () {
-	        editOff();
-	        dispatch.call('change');
-	      });
-	  }
+	  operation.annotation = function () {
+	    return _t('operations.split.annotation.' + _geometry, {
+	      n: _ways.length
+	    });
+	  };
 
-	  // Update the issue markers
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled) { return; }
+	  operation.id = 'split';
+	  operation.keys = [_t('operations.split.key')];
+	  operation.title = _t('operations.split.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	    var service = getService();
-	    var selectedID = context.selectedErrorID();
-	    var data = (service ? service.getItems(projection) : []);
-	    var getTransform = svgPointTransform(projection);
+	function operationStraighten(context, selectedIDs) {
+	  var _wayIDs = selectedIDs.filter(function (id) {
+	    return id.charAt(0) === 'w';
+	  });
 
-	    // Draw markers..
-	    var markers = drawLayer.selectAll('.qaItem.keepRight')
-	      .data(data, function (d) { return d.id; });
+	  var _nodeIDs = selectedIDs.filter(function (id) {
+	    return id.charAt(0) === 'n';
+	  });
 
-	    // exit
-	    markers.exit()
-	      .remove();
+	  var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';
 
-	    // enter
-	    var markersEnter = markers.enter()
-	      .append('g')
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.parentIssueType)); });
-
-	    markersEnter
-	      .append('ellipse')
-	        .attr('cx', 0.5)
-	        .attr('cy', 1)
-	        .attr('rx', 6.5)
-	        .attr('ry', 3)
-	        .attr('class', 'stroke');
-
-	    markersEnter
-	      .append('path')
-	        .call(markerPath, 'shadow');
-
-	    markersEnter
-	      .append('use')
-	        .attr('class', 'qaItem-fill')
-	        .attr('width', '20px')
-	        .attr('height', '20px')
-	        .attr('x', '-8px')
-	        .attr('y', '-22px')
-	        .attr('xlink:href', '#iD-icon-bolt');
+	  var _nodes = utilGetAllNodes(selectedIDs, context.graph());
 
-	    // update
-	    markers
-	      .merge(markersEnter)
-	      .sort(sortY)
-	        .classed('selected', function (d) { return d.id === selectedID; })
-	        .attr('transform', getTransform);
+	  var _coords = _nodes.map(function (n) {
+	    return n.loc;
+	  });
 
+	  var _extent = utilTotalExtent(selectedIDs, context.graph());
 
-	    // Draw targets..
-	    if (touchLayer.empty()) { return; }
-	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	  var _action = chooseAction();
 
-	    var targets = touchLayer.selectAll('.qaItem.keepRight')
-	      .data(data, function (d) { return d.id; });
+	  var _geometry;
 
-	    // exit
-	    targets.exit()
-	      .remove();
+	  function chooseAction() {
+	    // straighten selected nodes
+	    if (_wayIDs.length === 0 && _nodeIDs.length > 2) {
+	      _geometry = 'point';
+	      return actionStraightenNodes(_nodeIDs, context.projection); // straighten selected ways (possibly between range of 2 selected nodes)
+	    } else if (_wayIDs.length > 0 && (_nodeIDs.length === 0 || _nodeIDs.length === 2)) {
+	      var startNodeIDs = [];
+	      var endNodeIDs = [];
 
-	    // enter/update
-	    targets.enter()
-	      .append('rect')
-	        .attr('width', '20px')
-	        .attr('height', '20px')
-	        .attr('x', '-8px')
-	        .attr('y', '-22px')
-	      .merge(targets)
-	      .sort(sortY)
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " target " + fillClass + " itemId-" + (d.id)); })
-	        .attr('transform', getTransform);
+	      for (var i = 0; i < selectedIDs.length; i++) {
+	        var entity = context.entity(selectedIDs[i]);
 
+	        if (entity.type === 'node') {
+	          continue;
+	        } else if (entity.type !== 'way' || entity.isClosed()) {
+	          return null; // exit early, can't straighten these
+	        }
 
-	    function sortY(a, b) {
-	      return (a.id === selectedID) ? 1
-	        : (b.id === selectedID) ? -1
-	        : (a.severity === 'error' && b.severity !== 'error') ? 1
-	        : (b.severity === 'error' && a.severity !== 'error') ? -1
-	        : b.loc[1] - a.loc[1];
-	    }
-	  }
+	        startNodeIDs.push(entity.first());
+	        endNodeIDs.push(entity.last());
+	      } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
 
-	  // Draw the keepRight layer and schedule loading issues and updating markers.
-	  function drawKeepRight(selection) {
-	    var service = getService();
 
-	    var surface = context.surface();
-	    if (surface && !surface.empty()) {
-	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	    }
+	      startNodeIDs = startNodeIDs.filter(function (n) {
+	        return startNodeIDs.indexOf(n) === startNodeIDs.lastIndexOf(n);
+	      });
+	      endNodeIDs = endNodeIDs.filter(function (n) {
+	        return endNodeIDs.indexOf(n) === endNodeIDs.lastIndexOf(n);
+	      }); // Ensure all ways are connected (i.e. only 2 unique endpoints/startpoints)
 
-	    drawLayer = selection.selectAll('.layer-keepRight')
-	      .data(service ? [0] : []);
+	      if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes
 
-	    drawLayer.exit()
-	      .remove();
+	      var wayNodeIDs = utilGetAllNodes(_wayIDs, context.graph()).map(function (node) {
+	        return node.id;
+	      });
+	      if (wayNodeIDs.length <= 2) return null; // If range of 2 selected nodes is supplied, ensure nodes lie on the selected path
 
-	    drawLayer = drawLayer.enter()
-	      .append('g')
-	        .attr('class', 'layer-keepRight')
-	        .style('display', _layerEnabled ? 'block' : 'none')
-	      .merge(drawLayer);
+	      if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;
 
-	    if (_layerEnabled) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        service.loadIssues(projection);
-	        updateMarkers();
-	      } else {
-	        editOff();
+	      if (_nodeIDs.length) {
+	        // If we're only straightenting between two points, we only need that extent visible
+	        _extent = utilTotalExtent(_nodeIDs, context.graph());
 	      }
+
+	      _geometry = 'line';
+	      return actionStraightenWay(selectedIDs, context.projection);
 	    }
+
+	    return null;
 	  }
 
-	  // Toggles the layer on and off
-	  drawKeepRight.enabled = function(val) {
-	    if (!arguments.length) { return _layerEnabled; }
+	  function operation() {
+	    if (!_action) return;
+	    context.perform(_action, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  }
 
-	    _layerEnabled = val;
-	    if (_layerEnabled) {
-	      layerOn();
-	    } else {
-	      layerOff();
-	      if (context.selectedErrorID()) {
-	        context.enter(modeBrowse(context));
+	  operation.available = function () {
+	    return Boolean(_action);
+	  };
+
+	  operation.disabled = function () {
+	    var reason = _action.disabled(context.graph());
+
+	    if (reason) {
+	      return reason;
+	    } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
+	    } else if (someMissing()) {
+	      return 'not_downloaded';
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
+	    }
+
+	    return false;
+
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
+
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
+
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
 	      }
+
+	      return false;
 	    }
+	  };
 
-	    dispatch.call('change');
-	    return this;
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
 	  };
 
-	  drawKeepRight.supported = function () { return !!getService(); };
+	  operation.annotation = function () {
+	    return _t('operations.straighten.annotation.' + _geometry, {
+	      n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
+	    });
+	  };
 
-	  return drawKeepRight;
+	  operation.id = 'straighten';
+	  operation.keys = [_t('operations.straighten.key')];
+	  operation.title = _t('operations.straighten.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	function svgGeolocate(projection) {
-	    var layer = select(null);
-	    var _position;
+	var Operations = /*#__PURE__*/Object.freeze({
+		__proto__: null,
+		operationCircularize: operationCircularize,
+		operationContinue: operationContinue,
+		operationCopy: operationCopy,
+		operationDelete: operationDelete,
+		operationDisconnect: operationDisconnect,
+		operationDowngrade: operationDowngrade,
+		operationExtract: operationExtract,
+		operationMerge: operationMerge,
+		operationMove: operationMove,
+		operationOrthogonalize: operationOrthogonalize,
+		operationPaste: operationPaste,
+		operationReflectShort: operationReflectShort,
+		operationReflectLong: operationReflectLong,
+		operationReverse: operationReverse,
+		operationRotate: operationRotate,
+		operationSplit: operationSplit,
+		operationStraighten: operationStraighten
+	});
+
+	var _relatedParent;
+
+	function modeSelect(context, selectedIDs) {
+	  var mode = {
+	    id: 'select',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('select');
 
+	  var _breatheBehavior = behaviorBreathe();
 
-	    function init() {
-	        if (svgGeolocate.initialized) { return; }  // run once
-	        svgGeolocate.enabled = false;
-	        svgGeolocate.initialized = true;
-	    }
+	  var _modeDragNode = modeDragNode(context);
 
-	    function showLayer() {
-	        layer.style('display', 'block');
-	    }
+	  var _selectBehavior;
 
+	  var _behaviors = [];
+	  var _operations = [];
+	  var _newFeature = false;
+	  var _follow = false;
 
-	    function hideLayer() {
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0);
+	  function singular() {
+	    if (selectedIDs && selectedIDs.length === 1) {
+	      return context.hasEntity(selectedIDs[0]);
 	    }
+	  }
 
-	    function layerOn() {
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1);
+	  function selectedEntities() {
+	    return selectedIDs.map(function (id) {
+	      return context.hasEntity(id);
+	    }).filter(Boolean);
+	  }
 
-	    }
+	  function checkSelectedIDs() {
+	    var ids = [];
 
-	    function layerOff() {
-	        layer.style('display', 'none');
+	    if (Array.isArray(selectedIDs)) {
+	      ids = selectedIDs.filter(function (id) {
+	        return context.hasEntity(id);
+	      });
 	    }
 
-	    function transform(d) {
-	        return svgPointTransform(projection)(d);
+	    if (!ids.length) {
+	      context.enter(modeBrowse(context));
+	      return false;
+	    } else if (selectedIDs.length > 1 && ids.length === 1 || selectedIDs.length === 1 && ids.length > 1) {
+	      // switch between single- and multi-select UI
+	      context.enter(modeSelect(context, ids));
+	      return false;
 	    }
 
-	    function accuracy(accuracy, loc) { // converts accuracy to pixels...
-	        var degreesRadius = geoMetersToLat(accuracy),
-	            tangentLoc = [loc[0], loc[1] + degreesRadius],
-	            projectedTangent = projection(tangentLoc),
-	            projectedLoc = projection([loc[0], loc[1]]);
-
-	        // southern most point will have higher pixel value...
-	       return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
-	    }
+	    selectedIDs = ids;
+	    return true;
+	  } // find the common parent ways for nextVertex, previousVertex
 
-	    function update() {
-	        var geolocation = { loc: [_position.coords.longitude, _position.coords.latitude] };
 
-	        var groups = layer.selectAll('.geolocations').selectAll('.geolocation')
-	            .data([geolocation]);
+	  function commonParents() {
+	    var graph = context.graph();
+	    var commonParents = [];
 
-	        groups.exit()
-	            .remove();
+	    for (var i = 0; i < selectedIDs.length; i++) {
+	      var entity = context.hasEntity(selectedIDs[i]);
 
-	        var pointsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'geolocation');
+	      if (!entity || entity.geometry(graph) !== 'vertex') {
+	        return []; // selection includes some not vertices
+	      }
 
-	        pointsEnter
-	            .append('circle')
-	            .attr('class', 'geolocate-radius')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('fill', 'rgb(15,128,225)')
-	            .attr('fill-opacity', '0.3')
-	            .attr('r', '0');
+	      var currParents = graph.parentWays(entity).map(function (w) {
+	        return w.id;
+	      });
 
-	        pointsEnter
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('fill', 'rgb(15,128,225)')
-	            .attr('stroke', 'white')
-	            .attr('stroke-width', '1.5')
-	            .attr('r', '6');
+	      if (!commonParents.length) {
+	        commonParents = currParents;
+	        continue;
+	      }
 
-	        groups.merge(pointsEnter)
-	            .attr('transform', transform);
+	      commonParents = utilArrayIntersection(commonParents, currParents);
 
-	        layer.select('.geolocate-radius').attr('r', accuracy(_position.coords.accuracy, geolocation.loc));
+	      if (!commonParents.length) {
+	        return [];
+	      }
 	    }
 
-	    function drawLocation(selection) {
-	        var enabled = svgGeolocate.enabled;
-
-	        layer = selection.selectAll('.layer-geolocate')
-	            .data([0]);
+	    return commonParents;
+	  }
 
-	        layer.exit()
-	            .remove();
+	  function singularParent() {
+	    var parents = commonParents();
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-geolocate')
-	            .style('display', enabled ? 'block' : 'none');
+	    if (!parents || parents.length === 0) {
+	      _relatedParent = null;
+	      return null;
+	    } // relatedParent is used when we visit a vertex with multiple
+	    // parents, and we want to remember which parent line we started on.
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'geolocations');
 
-	        layer = layerEnter
-	            .merge(layer);
+	    if (parents.length === 1) {
+	      _relatedParent = parents[0]; // remember this parent for later
 
-	        if (enabled) {
-	            update();
-	        } else {
-	            layerOff();
-	        }
+	      return _relatedParent;
 	    }
 
-	    drawLocation.enabled = function (position, enabled) {
-	        if (!arguments.length) { return svgGeolocate.enabled; }
-	        _position = position;
-	        svgGeolocate.enabled = enabled;
-	        if (svgGeolocate.enabled) {
-	            showLayer();
-	            layerOn();
-	        } else {
-	            hideLayer();
-	        }
-	        return this;
-	    };
-
-	    init();
-	    return drawLocation;
-	}
-
-	function svgLabels(projection, context) {
-	    var path = d3_geoPath(projection);
-	    var detected = utilDetect();
-	    var baselineHack = (detected.ie ||
-	        detected.browser.toLowerCase() === 'edge' ||
-	        (detected.browser.toLowerCase() === 'firefox' && detected.version >= 70));
-	    var _rdrawn = new RBush();
-	    var _rskipped = new RBush();
-	    var _textWidthCache = {};
-	    var _entitybboxes = {};
-
-	    // Listed from highest to lowest priority
-	    var labelStack = [
-	        ['line', 'aeroway', '*', 12],
-	        ['line', 'highway', 'motorway', 12],
-	        ['line', 'highway', 'trunk', 12],
-	        ['line', 'highway', 'primary', 12],
-	        ['line', 'highway', 'secondary', 12],
-	        ['line', 'highway', 'tertiary', 12],
-	        ['line', 'highway', '*', 12],
-	        ['line', 'railway', '*', 12],
-	        ['line', 'waterway', '*', 12],
-	        ['area', 'aeroway', '*', 12],
-	        ['area', 'amenity', '*', 12],
-	        ['area', 'building', '*', 12],
-	        ['area', 'historic', '*', 12],
-	        ['area', 'leisure', '*', 12],
-	        ['area', 'man_made', '*', 12],
-	        ['area', 'natural', '*', 12],
-	        ['area', 'shop', '*', 12],
-	        ['area', 'tourism', '*', 12],
-	        ['area', 'camp_site', '*', 12],
-	        ['point', 'aeroway', '*', 10],
-	        ['point', 'amenity', '*', 10],
-	        ['point', 'building', '*', 10],
-	        ['point', 'historic', '*', 10],
-	        ['point', 'leisure', '*', 10],
-	        ['point', 'man_made', '*', 10],
-	        ['point', 'natural', '*', 10],
-	        ['point', 'shop', '*', 10],
-	        ['point', 'tourism', '*', 10],
-	        ['point', 'camp_site', '*', 10],
-	        ['line', 'name', '*', 12],
-	        ['area', 'name', '*', 12],
-	        ['point', 'name', '*', 10]
-	    ];
-
-
-	    function shouldSkipIcon(preset) {
-	        var noIcons = ['building', 'landuse', 'natural'];
-	        return noIcons.some(function(s) {
-	            return preset.id.indexOf(s) >= 0;
-	        });
+	    if (parents.indexOf(_relatedParent) !== -1) {
+	      return _relatedParent; // prefer the previously seen parent
 	    }
 
+	    return parents[0];
+	  }
 
-	    function get(array, prop) {
-	        return function(d, i) { return array[i][prop]; };
-	    }
-
+	  mode.selectedIDs = function (val) {
+	    if (!arguments.length) return selectedIDs;
+	    selectedIDs = val;
+	    return mode;
+	  };
 
-	    function textWidth(text, size, elem) {
-	        var c = _textWidthCache[size];
-	        if (!c) { c = _textWidthCache[size] = {}; }
+	  mode.zoomToSelected = function () {
+	    context.map().zoomToEase(selectedEntities());
+	  };
 
-	        if (c[text]) {
-	            return c[text];
+	  mode.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return mode;
+	  };
 
-	        } else if (elem) {
-	            c[text] = elem.getComputedTextLength();
-	            return c[text];
+	  mode.selectBehavior = function (val) {
+	    if (!arguments.length) return _selectBehavior;
+	    _selectBehavior = val;
+	    return mode;
+	  };
 
-	        } else {
-	            var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
-	            if (str === null) {
-	                return size / 3 * 2 * text.length;
-	            } else {
-	                return size / 3 * (2 * text.length + str.length);
-	            }
-	        }
-	    }
+	  mode.follow = function (val) {
+	    if (!arguments.length) return _follow;
+	    _follow = val;
+	    return mode;
+	  };
 
+	  function loadOperations() {
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.uninstall(operation.behavior);
+	      }
+	    });
 
-	    function drawLinePaths(selection, entities, filter, classes, labels) {
-	        var paths = selection.selectAll('path')
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
-
-	        // exit
-	        paths.exit()
-	            .remove();
-
-	        // enter/update
-	        paths.enter()
-	            .append('path')
-	            .style('stroke-width', get(labels, 'font-size'))
-	            .attr('id', function(d) { return 'ideditor-labelpath-' + d.id; })
-	            .attr('class', classes)
-	            .merge(paths)
-	            .attr('d', get(labels, 'lineString'));
-	    }
-
-
-	    function drawLineLabels(selection, entities, filter, classes, labels) {
-	        var texts = selection.selectAll('text.' + classes)
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
-
-	        // exit
-	        texts.exit()
-	            .remove();
-
-	        // enter
-	        texts.enter()
-	            .append('text')
-	            .attr('class', function(d, i) { return classes + ' ' + labels[i].classes + ' ' + d.id; })
-	            .attr('dy', baselineHack ? '0.35em' : null)
-	            .append('textPath')
-	            .attr('class', 'textpath');
-
-	        // update
-	        selection.selectAll('text.' + classes).selectAll('.textpath')
-	            .filter(filter)
-	            .data(entities, osmEntity.key)
-	            .attr('startOffset', '50%')
-	            .attr('xlink:href', function(d) { return '#ideditor-labelpath-' + d.id; })
-	            .text(utilDisplayNameForPath);
-	    }
-
-
-	    function drawPointLabels(selection, entities, filter, classes, labels) {
-	        var texts = selection.selectAll('text.' + classes)
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
-
-	        // exit
-	        texts.exit()
-	            .remove();
-
-	        // enter/update
-	        texts.enter()
-	            .append('text')
-	            .attr('class', function(d, i) {
-	                return classes + ' ' + labels[i].classes + ' ' + d.id;
-	            })
-	            .merge(texts)
-	            .attr('x', get(labels, 'x'))
-	            .attr('y', get(labels, 'y'))
-	            .style('text-anchor', get(labels, 'textAnchor'))
-	            .text(utilDisplayName)
-	            .each(function(d, i) {
-	                textWidth(utilDisplayName(d), labels[i].height, this);
-	            });
-	    }
+	    _operations = Object.values(Operations).map(function (o) {
+	      return o(context, selectedIDs);
+	    }).filter(function (o) {
+	      return o.id !== 'delete' && o.id !== 'downgrade' && o.id !== 'copy';
+	    }).concat([// group copy/downgrade/delete operation together at the end of the list
+	    operationCopy(context, selectedIDs), operationDowngrade(context, selectedIDs), operationDelete(context, selectedIDs)]).filter(function (operation) {
+	      return operation.available();
+	    });
 
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.install(operation.behavior);
+	      }
+	    }); // remove any displayed menu
 
-	    function drawAreaLabels(selection, entities, filter, classes, labels) {
-	        entities = entities.filter(hasText);
-	        labels = labels.filter(hasText);
-	        drawPointLabels(selection, entities, filter, classes, labels);
 
-	        function hasText(d, i) {
-	            return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
-	        }
-	    }
+	    context.ui().closeEditMenu();
+	  }
 
+	  mode.operations = function () {
+	    return _operations;
+	  };
 
-	    function drawAreaIcons(selection, entities, filter, classes, labels) {
-	        var icons = selection.selectAll('use.' + classes)
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
+	  mode.enter = function () {
+	    if (!checkSelectedIDs()) return;
+	    context.features().forceVisible(selectedIDs);
 
-	        // exit
-	        icons.exit()
-	            .remove();
+	    _modeDragNode.restoreSelectedIDs(selectedIDs);
 
-	        // enter/update
-	        icons.enter()
-	            .append('use')
-	            .attr('class', 'icon ' + classes)
-	            .attr('width', '17px')
-	            .attr('height', '17px')
-	            .merge(icons)
-	            .attr('transform', get(labels, 'transform'))
-	            .attr('xlink:href', function(d) {
-	                var preset = _mainPresetIndex.match(d, context.graph());
-	                var picon = preset && preset.icon;
+	    loadOperations();
 
-	                if (!picon) {
-	                    return '';
-	                } else {
-	                    var isMaki = /^maki-/.test(picon);
-	                    return '#' + picon + (isMaki ? '-15' : '');
-	                }
-	            });
+	    if (!_behaviors.length) {
+	      if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
+	      _behaviors = [behaviorPaste(context), _breatheBehavior, behaviorHover(context).on('hover', context.ui().sidebar.hoverModeSelect), _selectBehavior, behaviorLasso(context), _modeDragNode.behavior, modeDragNote(context).behavior];
 	    }
 
+	    _behaviors.forEach(context.install);
 
-	    function drawCollisionBoxes(selection, rtree, which) {
-	        var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
-
-	        var gj = [];
-	        if (context.getDebug('collision')) {
-	            gj = rtree.all().map(function(d) {
-	                return { type: 'Polygon', coordinates: [[
-	                    [d.minX, d.minY],
-	                    [d.maxX, d.minY],
-	                    [d.maxX, d.maxY],
-	                    [d.minX, d.maxY],
-	                    [d.minX, d.minY]
-	                ]]};
-	            });
-	        }
-
-	        var boxes = selection.selectAll('.' + which)
-	            .data(gj);
-
-	        // exit
-	        boxes.exit()
-	            .remove();
+	    keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on(['[', 'pgup'], previousVertex).on([']', 'pgdown'], nextVertex).on(['{', uiCmd('⌘['), 'home'], firstVertex).on(['}', uiCmd('⌘]'), 'end'], lastVertex).on(uiCmd('⇧←'), nudgeSelection([-10, 0])).on(uiCmd('⇧↑'), nudgeSelection([0, -10])).on(uiCmd('⇧→'), nudgeSelection([10, 0])).on(uiCmd('⇧↓'), nudgeSelection([0, 10])).on(uiCmd('⇧⌥←'), nudgeSelection([-100, 0])).on(uiCmd('⇧⌥↑'), nudgeSelection([0, -100])).on(uiCmd('⇧⌥→'), nudgeSelection([100, 0])).on(uiCmd('⇧⌥↓'), nudgeSelection([0, 100])).on(utilKeybinding.plusKeys.map(function (key) {
+	      return uiCmd('⇧' + key);
+	    }), scaleSelection(1.05)).on(utilKeybinding.plusKeys.map(function (key) {
+	      return uiCmd('⇧⌥' + key);
+	    }), scaleSelection(Math.pow(1.05, 5))).on(utilKeybinding.minusKeys.map(function (key) {
+	      return uiCmd('⇧' + key);
+	    }), scaleSelection(1 / 1.05)).on(utilKeybinding.minusKeys.map(function (key) {
+	      return uiCmd('⇧⌥' + key);
+	    }), scaleSelection(1 / Math.pow(1.05, 5))).on(['\\', 'pause'], nextParent).on('⎋', esc, true);
+	    select(document).call(keybinding);
+	    context.ui().sidebar.select(selectedIDs, _newFeature);
+	    context.history().on('change.select', function () {
+	      loadOperations(); // reselect after change in case relation members were removed or added
 
-	        // enter/update
-	        boxes.enter()
-	            .append('path')
-	            .attr('class', classes)
-	            .merge(boxes)
-	            .attr('d', d3_geoPath());
-	    }
+	      selectElements();
+	    }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
+	    context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
+	      selectElements();
 
+	      _breatheBehavior.restartIfNeeded(context.surface());
+	    });
+	    context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
+	    selectElements();
 
-	    function drawLabels(selection, graph, entities, filter, dimensions, fullRedraw) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
+	    if (_follow) {
+	      var extent = geoExtent();
+	      var graph = context.graph();
+	      selectedIDs.forEach(function (id) {
+	        var entity = context.entity(id);
 
-	        var labelable = [];
-	        var renderNodeAs = {};
-	        var i, j, k, entity, geometry;
+	        extent._extend(entity.extent(graph));
+	      });
+	      var loc = extent.center();
+	      context.map().centerEase(loc); // we could enter the mode multiple times, so reset follow for next time
 
-	        for (i = 0; i < labelStack.length; i++) {
-	            labelable.push([]);
-	        }
+	      _follow = false;
+	    }
 
-	        if (fullRedraw) {
-	            _rdrawn.clear();
-	            _rskipped.clear();
-	            _entitybboxes = {};
+	    function nudgeSelection(delta) {
+	      return function () {
+	        // prevent nudging during low zoom selection
+	        if (!context.map().withinEditableZoom()) return;
+	        var moveOp = operationMove(context, selectedIDs);
 
+	        if (moveOp.disabled()) {
+	          context.ui().flash.duration(4000).iconName('#iD-operation-' + moveOp.id).iconClass('operation disabled').label(moveOp.tooltip)();
 	        } else {
-	            for (i = 0; i < entities.length; i++) {
-	                entity = entities[i];
-	                var toRemove = []
-	                    .concat(_entitybboxes[entity.id] || [])
-	                    .concat(_entitybboxes[entity.id + 'I'] || []);
-
-	                for (j = 0; j < toRemove.length; j++) {
-	                    _rdrawn.remove(toRemove[j]);
-	                    _rskipped.remove(toRemove[j]);
-	                }
-	            }
+	          context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
+	          context.validator().validate();
 	        }
+	      };
+	    }
 
-	        // Loop through all the entities to do some preprocessing
-	        for (i = 0; i < entities.length; i++) {
-	            entity = entities[i];
-	            geometry = entity.geometry(graph);
+	    function scaleSelection(factor) {
+	      return function () {
+	        // prevent scaling during low zoom selection
+	        if (!context.map().withinEditableZoom()) return;
+	        var nodes = utilGetAllNodes(selectedIDs, context.graph());
+	        var isUp = factor > 1; // can only scale if multiple nodes are selected
+
+	        if (nodes.length <= 1) return;
+	        var extent = utilTotalExtent(selectedIDs, context.graph()); // These disabled checks would normally be handled by an operation
+	        // object, but we don't want an actual scale operation at this point.
+
+	        function scalingDisabled() {
+	          if (tooSmall()) {
+	            return 'too_small';
+	          } else if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	            return 'too_large';
+	          } else if (someMissing() || selectedIDs.some(incompleteRelation)) {
+	            return 'not_downloaded';
+	          } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	            return 'connected_to_hidden';
+	          }
 
-	            // Insert collision boxes around interesting points/vertices
-	            if (geometry === 'point' || (geometry === 'vertex' && isInterestingVertex(entity))) {
-	                var hasDirections = entity.directions(graph, projection).length;
-	                var markerPadding;
+	          return false;
 
-	                if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
-	                    renderNodeAs[entity.id] = 'point';
-	                    markerPadding = 20;   // extra y for marker height
-	                } else {
-	                    renderNodeAs[entity.id] = 'vertex';
-	                    markerPadding = 0;
-	                }
+	          function tooSmall() {
+	            if (isUp) return false;
+	            var dLon = Math.abs(extent[1][0] - extent[0][0]);
+	            var dLat = Math.abs(extent[1][1] - extent[0][1]);
+	            return dLon < geoMetersToLon(1, extent[1][1]) && dLat < geoMetersToLat(1);
+	          }
 
-	                var coord = projection(entity.loc);
-	                var nodePadding = 10;
-	                var bbox = {
-	                    minX: coord[0] - nodePadding,
-	                    minY: coord[1] - nodePadding - markerPadding,
-	                    maxX: coord[0] + nodePadding,
-	                    maxY: coord[1] + nodePadding
-	                };
+	          function someMissing() {
+	            if (context.inIntro()) return false;
+	            var osm = context.connection();
 
-	                doInsert(bbox, entity.id + 'P');
-	            }
+	            if (osm) {
+	              var missing = nodes.filter(function (n) {
+	                return !osm.isDataLoaded(n.loc);
+	              });
 
-	            // From here on, treat vertices like points
-	            if (geometry === 'vertex') {
-	                geometry = 'point';
+	              if (missing.length) {
+	                missing.forEach(function (loc) {
+	                  context.loadTileAtLoc(loc);
+	                });
+	                return true;
+	              }
 	            }
 
-	            // Determine which entities are label-able
-	            var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
-	            var icon = preset && !shouldSkipIcon(preset) && preset.icon;
+	            return false;
+	          }
 
-	            if (!icon && !utilDisplayName(entity))
-	                { continue; }
+	          function incompleteRelation(id) {
+	            var entity = context.entity(id);
+	            return entity.type === 'relation' && !entity.isComplete(context.graph());
+	          }
+	        }
 
-	            for (k = 0; k < labelStack.length; k++) {
-	                var matchGeom = labelStack[k][0];
-	                var matchKey = labelStack[k][1];
-	                var matchVal = labelStack[k][2];
-	                var hasVal = entity.tags[matchKey];
+	        var disabled = scalingDisabled();
 
-	                if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
-	                    labelable[k].push(entity);
-	                    break;
-	                }
-	            }
+	        if (disabled) {
+	          var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	          context.ui().flash.duration(4000).iconName('#iD-icon-no').iconClass('operation disabled').label(_t('operations.scale.' + disabled + '.' + multi))();
+	        } else {
+	          var pivot = context.projection(extent.center());
+	          var annotation = _t('operations.scale.annotation.' + (isUp ? 'up' : 'down') + '.feature', {
+	            n: selectedIDs.length
+	          });
+	          context.perform(actionScale(selectedIDs, pivot, factor, context.projection), annotation);
+	          context.validator().validate();
 	        }
+	      };
+	    }
 
-	        var positions = {
-	            point: [],
-	            line: [],
-	            area: []
-	        };
-
-	        var labelled = {
-	            point: [],
-	            line: [],
-	            area: []
-	        };
+	    function didDoubleUp(d3_event, loc) {
+	      if (!context.map().withinEditableZoom()) return;
+	      var target = select(d3_event.target);
+	      var datum = target.datum();
+	      var entity = datum && datum.properties && datum.properties.entity;
+	      if (!entity) return;
+
+	      if (entity instanceof osmWay && target.classed('target')) {
+	        var choice = geoChooseEdge(context.graph().childNodes(entity), loc, context.projection);
+	        var prev = entity.nodes[choice.index - 1];
+	        var next = entity.nodes[choice.index];
+	        context.perform(actionAddMidpoint({
+	          loc: choice.loc,
+	          edge: [prev, next]
+	        }, osmNode()), _t('operations.add.annotation.vertex'));
+	      } else if (entity.type === 'midpoint') {
+	        context.perform(actionAddMidpoint({
+	          loc: entity.loc,
+	          edge: entity.edge
+	        }, osmNode()), _t('operations.add.annotation.vertex'));
+	      }
+	    }
 
-	        // Try and find a valid label for labellable entities
-	        for (k = 0; k < labelable.length; k++) {
-	            var fontSize = labelStack[k][3];
+	    function selectElements() {
+	      if (!checkSelectedIDs()) return;
+	      var surface = context.surface();
+	      surface.selectAll('.selected-member').classed('selected-member', false);
+	      surface.selectAll('.selected').classed('selected', false);
+	      surface.selectAll('.related').classed('related', false);
+	      singularParent();
 
-	            for (i = 0; i < labelable[k].length; i++) {
-	                entity = labelable[k][i];
-	                geometry = entity.geometry(graph);
+	      if (_relatedParent) {
+	        surface.selectAll(utilEntitySelector([_relatedParent])).classed('related', true);
+	      }
 
-	                var getName = (geometry === 'line') ? utilDisplayNameForPath : utilDisplayName;
-	                var name = getName(entity);
-	                var width = name && textWidth(name, fontSize);
-	                var p = null;
+	      if (context.map().withinEditableZoom()) {
+	        // Apply selection styling if not in wide selection
+	        surface.selectAll(utilDeepMemberSelector(selectedIDs, context.graph(), true
+	        /* skipMultipolgonMembers */
+	        )).classed('selected-member', true);
+	        surface.selectAll(utilEntityOrDeepMemberSelector(selectedIDs, context.graph())).classed('selected', true);
+	      }
+	    }
 
-	                if (geometry === 'point' || geometry === 'vertex') {
-	                    // no point or vertex labels in wireframe mode
-	                    // no vertex labels at low zooms (vertices have no icons)
-	                    if (wireframe) { continue; }
-	                    var renderAs = renderNodeAs[entity.id];
-	                    if (renderAs === 'vertex' && zoom < 17) { continue; }
+	    function esc() {
+	      if (context.container().select('.combobox').size()) return;
+	      context.enter(modeBrowse(context));
+	    }
 
-	                    p = getPointLabel(entity, width, fontSize, renderAs);
+	    function firstVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var entity = singular();
+	      var parent = singularParent();
+	      var way;
 
-	                } else if (geometry === 'line') {
-	                    p = getLineLabel(entity, width, fontSize);
+	      if (entity && entity.type === 'way') {
+	        way = entity;
+	      } else if (parent) {
+	        way = context.entity(parent);
+	      }
 
-	                } else if (geometry === 'area') {
-	                    p = getAreaLabel(entity, width, fontSize);
-	                }
+	      if (way) {
+	        context.enter(modeSelect(context, [way.first()]).follow(true));
+	      }
+	    }
 
-	                if (p) {
-	                    if (geometry === 'vertex') { geometry = 'point'; }  // treat vertex like point
-	                    p.classes = geometry + ' tag-' + labelStack[k][1];
-	                    positions[geometry].push(p);
-	                    labelled[geometry].push(entity);
-	                }
-	            }
-	        }
+	    function lastVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var entity = singular();
+	      var parent = singularParent();
+	      var way;
 
+	      if (entity && entity.type === 'way') {
+	        way = entity;
+	      } else if (parent) {
+	        way = context.entity(parent);
+	      }
 
-	        function isInterestingVertex(entity) {
-	            var selectedIDs = context.selectedIDs();
+	      if (way) {
+	        context.enter(modeSelect(context, [way.last()]).follow(true));
+	      }
+	    }
 
-	            return entity.hasInterestingTags() ||
-	                entity.isEndpoint(graph) ||
-	                entity.isConnected(graph) ||
-	                selectedIDs.indexOf(entity.id) !== -1 ||
-	                graph.parentWays(entity).some(function(parent) {
-	                    return selectedIDs.indexOf(parent.id) !== -1;
-	                });
-	        }
+	    function previousVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var parent = singularParent();
+	      if (!parent) return;
+	      var way = context.entity(parent);
+	      var length = way.nodes.length;
+	      var curr = way.nodes.indexOf(selectedIDs[0]);
+	      var index = -1;
 
+	      if (curr > 0) {
+	        index = curr - 1;
+	      } else if (way.isClosed()) {
+	        index = length - 2;
+	      }
 
-	        function getPointLabel(entity, width, height, geometry) {
-	            var y = (geometry === 'point' ? -12 : 0);
-	            var pointOffsets = {
-	                ltr: [15, y, 'start'],
-	                rtl: [-15, y, 'end']
-	            };
+	      if (index !== -1) {
+	        context.enter(modeSelect(context, [way.nodes[index]]).follow(true));
+	      }
+	    }
 
-	            var textDirection = _mainLocalizer.textDirection();
+	    function nextVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var parent = singularParent();
+	      if (!parent) return;
+	      var way = context.entity(parent);
+	      var length = way.nodes.length;
+	      var curr = way.nodes.indexOf(selectedIDs[0]);
+	      var index = -1;
 
-	            var coord = projection(entity.loc);
-	            var textPadding = 2;
-	            var offset = pointOffsets[textDirection];
-	            var p = {
-	                height: height,
-	                width: width,
-	                x: coord[0] + offset[0],
-	                y: coord[1] + offset[1],
-	                textAnchor: offset[2]
-	            };
+	      if (curr < length - 1) {
+	        index = curr + 1;
+	      } else if (way.isClosed()) {
+	        index = 0;
+	      }
 
-	            // insert a collision box for the text label..
-	            var bbox;
-	            if (textDirection === 'rtl') {
-	                bbox = {
-	                    minX: p.x - width - textPadding,
-	                    minY: p.y - (height / 2) - textPadding,
-	                    maxX: p.x + textPadding,
-	                    maxY: p.y + (height / 2) + textPadding
-	                };
-	            } else {
-	                bbox = {
-	                    minX: p.x - textPadding,
-	                    minY: p.y - (height / 2) - textPadding,
-	                    maxX: p.x + width + textPadding,
-	                    maxY: p.y + (height / 2) + textPadding
-	                };
-	            }
+	      if (index !== -1) {
+	        context.enter(modeSelect(context, [way.nodes[index]]).follow(true));
+	      }
+	    }
 
-	            if (tryInsert([bbox], entity.id, true)) {
-	                return p;
-	            }
-	        }
+	    function nextParent(d3_event) {
+	      d3_event.preventDefault();
+	      var parents = commonParents();
+	      if (!parents || parents.length < 2) return;
+	      var index = parents.indexOf(_relatedParent);
 
+	      if (index < 0 || index > parents.length - 2) {
+	        _relatedParent = parents[0];
+	      } else {
+	        _relatedParent = parents[index + 1];
+	      }
 
-	        function getLineLabel(entity, width, height) {
-	            var viewport = geoExtent(context.projection.clipExtent()).polygon();
-	            var points = graph.childNodes(entity)
-	                .map(function(node) { return projection(node.loc); });
-	            var length = geoPathLength(points);
+	      var surface = context.surface();
+	      surface.selectAll('.related').classed('related', false);
 
-	            if (length < width + 20) { return; }
+	      if (_relatedParent) {
+	        surface.selectAll(utilEntitySelector([_relatedParent])).classed('related', true);
+	      }
+	    }
+	  };
 
-	            // % along the line to attempt to place the label
-	            var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70,
-	                               25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
-	            var padding = 3;
+	  mode.exit = function () {
+	    _newFeature = false;
 
-	            for (var i = 0; i < lineOffsets.length; i++) {
-	                var offset = lineOffsets[i];
-	                var middle = offset / 100 * length;
-	                var start = middle - width / 2;
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.uninstall(operation.behavior);
+	      }
+	    });
 
-	                if (start < 0 || start + width > length) { continue; }
+	    _operations = [];
 
-	                // generate subpath and ignore paths that are invalid or don't cross viewport.
-	                var sub = subpath(points, start, start + width);
-	                if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
-	                    continue;
-	                }
+	    _behaviors.forEach(context.uninstall);
 
-	                var isReverse = reverse(sub);
-	                if (isReverse) {
-	                    sub = sub.reverse();
-	                }
+	    select(document).call(keybinding.unbind);
+	    context.ui().closeEditMenu();
+	    context.history().on('change.select', null).on('undone.select', null).on('redone.select', null);
+	    var surface = context.surface();
+	    surface.selectAll('.selected-member').classed('selected-member', false);
+	    surface.selectAll('.selected').classed('selected', false);
+	    surface.selectAll('.highlighted').classed('highlighted', false);
+	    surface.selectAll('.related').classed('related', false);
+	    context.map().on('drawn.select', null);
+	    context.ui().sidebar.hide();
+	    context.features().forceVisible([]);
+	    var entity = singular();
+
+	    if (_newFeature && entity && entity.type === 'relation' && // no tags
+	    Object.keys(entity.tags).length === 0 && // no parent relations
+	    context.graph().parentRelations(entity).length === 0 && ( // no members or one member with no role
+	    entity.members.length === 0 || entity.members.length === 1 && !entity.members[0].role)) {
+	      // the user added this relation but didn't edit it at all, so just delete it
+	      var deleteAction = actionDeleteRelation(entity.id, true
+	      /* don't delete untagged members */
+	      );
+	      context.perform(deleteAction, _t('operations.delete.annotation.relation'));
+	    }
+	  };
 
-	                var bboxes = [];
-	                var boxsize = (height + 2) / 2;
-
-	                for (var j = 0; j < sub.length - 1; j++) {
-	                    var a = sub[j];
-	                    var b = sub[j + 1];
-
-	                    // split up the text into small collision boxes
-	                    var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
-
-	                    for (var box = 0; box < num; box++) {
-	                        var p = geoVecInterp(a, b, box / num);
-	                        var x0 = p[0] - boxsize - padding;
-	                        var y0 = p[1] - boxsize - padding;
-	                        var x1 = p[0] + boxsize + padding;
-	                        var y1 = p[1] + boxsize + padding;
-
-	                        bboxes.push({
-	                            minX: Math.min(x0, x1),
-	                            minY: Math.min(y0, y1),
-	                            maxX: Math.max(x0, x1),
-	                            maxY: Math.max(y0, y1)
-	                        });
-	                    }
-	                }
+	  return mode;
+	}
 
-	                if (tryInsert(bboxes, entity.id, false)) {   // accept this one
-	                    return {
-	                        'font-size': height + 2,
-	                        lineString: lineString(sub),
-	                        startOffset: offset + '%'
-	                    };
-	                }
-	            }
+	function uiLasso(context) {
+	  var group, polygon;
+	  lasso.coordinates = [];
 
-	            function reverse(p) {
-	                var angle = Math.atan2(p[1][1] - p[0][1], p[1][0] - p[0][0]);
-	                return !(p[0][0] < p[p.length - 1][0] && angle < Math.PI/2 && angle > -Math.PI/2);
-	            }
+	  function lasso(selection) {
+	    context.container().classed('lasso', true);
+	    group = selection.append('g').attr('class', 'lasso hide');
+	    polygon = group.append('path').attr('class', 'lasso-path');
+	    group.call(uiToggle(true));
+	  }
 
-	            function lineString(points) {
-	                return 'M' + points.join('L');
-	            }
+	  function draw() {
+	    if (polygon) {
+	      polygon.data([lasso.coordinates]).attr('d', function (d) {
+	        return 'M' + d.join(' L') + ' Z';
+	      });
+	    }
+	  }
 
-	            function subpath(points, from, to) {
-	                var sofar = 0;
-	                var start, end, i0, i1;
-
-	                for (var i = 0; i < points.length - 1; i++) {
-	                    var a = points[i];
-	                    var b = points[i + 1];
-	                    var current = geoVecLength(a, b);
-	                    var portion;
-	                    if (!start && sofar + current >= from) {
-	                        portion = (from - sofar) / current;
-	                        start = [
-	                            a[0] + portion * (b[0] - a[0]),
-	                            a[1] + portion * (b[1] - a[1])
-	                        ];
-	                        i0 = i + 1;
-	                    }
-	                    if (!end && sofar + current >= to) {
-	                        portion = (to - sofar) / current;
-	                        end = [
-	                            a[0] + portion * (b[0] - a[0]),
-	                            a[1] + portion * (b[1] - a[1])
-	                        ];
-	                        i1 = i + 1;
-	                    }
-	                    sofar += current;
-	                }
+	  lasso.extent = function () {
+	    return lasso.coordinates.reduce(function (extent, point) {
+	      return extent.extend(geoExtent(point));
+	    }, geoExtent());
+	  };
 
-	                var result = points.slice(i0, i1);
-	                result.unshift(start);
-	                result.push(end);
-	                return result;
-	            }
-	        }
+	  lasso.p = function (_) {
+	    if (!arguments.length) return lasso;
+	    lasso.coordinates.push(_);
+	    draw();
+	    return lasso;
+	  };
 
+	  lasso.close = function () {
+	    if (group) {
+	      group.call(uiToggle(false, function () {
+	        select(this).remove();
+	      }));
+	    }
 
-	        function getAreaLabel(entity, width, height) {
-	            var centroid = path.centroid(entity.asGeoJSON(graph, true));
-	            var extent = entity.extent(graph);
-	            var areaWidth = projection(extent[1])[0] - projection(extent[0])[0];
+	    context.container().classed('lasso', false);
+	  };
 
-	            if (isNaN(centroid[0]) || areaWidth < 20) { return; }
+	  return lasso;
+	}
 
-	            var preset = _mainPresetIndex.match(entity, context.graph());
-	            var picon = preset && preset.icon;
-	            var iconSize = 17;
-	            var padding = 2;
-	            var p = {};
-
-	            if (picon) {  // icon and label..
-	                if (addIcon()) {
-	                    addLabel(iconSize + padding);
-	                    return p;
-	                }
-	            } else {   // label only..
-	                if (addLabel(0)) {
-	                    return p;
-	                }
-	            }
+	function behaviorLasso(context) {
+	  // use pointer events on supported platforms; fallback to mouse events
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
+	  var behavior = function behavior(selection) {
+	    var lasso;
 
-	            function addIcon() {
-	                var iconX = centroid[0] - (iconSize / 2);
-	                var iconY = centroid[1] - (iconSize / 2);
-	                var bbox = {
-	                    minX: iconX,
-	                    minY: iconY,
-	                    maxX: iconX + iconSize,
-	                    maxY: iconY + iconSize
-	                };
+	    function pointerdown(d3_event) {
+	      var button = 0; // left
 
-	                if (tryInsert([bbox], entity.id + 'I', true)) {
-	                    p.transform = 'translate(' + iconX + ',' + iconY + ')';
-	                    return true;
-	                }
-	                return false;
-	            }
+	      if (d3_event.button === button && d3_event.shiftKey === true) {
+	        lasso = null;
+	        select(window).on(_pointerPrefix + 'move.lasso', pointermove).on(_pointerPrefix + 'up.lasso', pointerup);
+	        d3_event.stopPropagation();
+	      }
+	    }
 
-	            function addLabel(yOffset) {
-	                if (width && areaWidth >= width + 20) {
-	                    var labelX = centroid[0];
-	                    var labelY = centroid[1] + yOffset;
-	                    var bbox = {
-	                        minX: labelX - (width / 2) - padding,
-	                        minY: labelY - (height / 2) - padding,
-	                        maxX: labelX + (width / 2) + padding,
-	                        maxY: labelY + (height / 2) + padding
-	                    };
-
-	                    if (tryInsert([bbox], entity.id, true)) {
-	                        p.x = labelX;
-	                        p.y = labelY;
-	                        p.textAnchor = 'middle';
-	                        p.height = height;
-	                        return true;
-	                    }
-	                }
-	                return false;
-	            }
-	        }
+	    function pointermove() {
+	      if (!lasso) {
+	        lasso = uiLasso(context);
+	        context.surface().call(lasso);
+	      }
 
+	      lasso.p(context.map().mouse());
+	    }
 
-	        // force insert a singular bounding box
-	        // singular box only, no array, id better be unique
-	        function doInsert(bbox, id) {
-	            bbox.id = id;
+	    function normalize(a, b) {
+	      return [[Math.min(a[0], b[0]), Math.min(a[1], b[1])], [Math.max(a[0], b[0]), Math.max(a[1], b[1])]];
+	    }
 
-	            var oldbox = _entitybboxes[id];
-	            if (oldbox) {
-	                _rdrawn.remove(oldbox);
-	            }
-	            _entitybboxes[id] = bbox;
-	            _rdrawn.insert(bbox);
-	        }
+	    function lassoed() {
+	      if (!lasso) return [];
+	      var graph = context.graph();
+	      var limitToNodes;
 
+	      if (context.map().editableDataEnabled(true
+	      /* skipZoomCheck */
+	      ) && context.map().isInWideSelection()) {
+	        // only select from the visible nodes
+	        limitToNodes = new Set(utilGetAllNodes(context.selectedIDs(), graph));
+	      } else if (!context.map().editableDataEnabled()) {
+	        return [];
+	      }
 
-	        function tryInsert(bboxes, id, saveSkipped) {
-	            var skipped = false;
+	      var bounds = lasso.extent().map(context.projection.invert);
+	      var extent = geoExtent(normalize(bounds[0], bounds[1]));
+	      var intersects = context.history().intersects(extent).filter(function (entity) {
+	        return entity.type === 'node' && (!limitToNodes || limitToNodes.has(entity)) && geoPointInPolygon(context.projection(entity.loc), lasso.coordinates) && !context.features().isHidden(entity, graph, entity.geometry(graph));
+	      }); // sort the lassoed nodes as best we can
 
-	            for (var i = 0; i < bboxes.length; i++) {
-	                var bbox = bboxes[i];
-	                bbox.id = id;
+	      intersects.sort(function (node1, node2) {
+	        var parents1 = graph.parentWays(node1);
+	        var parents2 = graph.parentWays(node2);
 
-	                // Check that label is visible
-	                if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
-	                    skipped = true;
-	                    break;
-	                }
-	                if (_rdrawn.collides(bbox)) {
-	                    skipped = true;
-	                    break;
-	                }
-	            }
+	        if (parents1.length && parents2.length) {
+	          // both nodes are vertices
+	          var sharedParents = utilArrayIntersection(parents1, parents2);
 
-	            _entitybboxes[id] = bboxes;
+	          if (sharedParents.length) {
+	            var sharedParentNodes = sharedParents[0].nodes; // vertices are members of the same way; sort them in their listed order
 
-	            if (skipped) {
-	                if (saveSkipped) {
-	                    _rskipped.load(bboxes);
-	                }
-	            } else {
-	                _rdrawn.load(bboxes);
-	            }
+	            return sharedParentNodes.indexOf(node1.id) - sharedParentNodes.indexOf(node2.id);
+	          } else {
+	            // vertices do not share a way; group them by their respective parent ways
+	            return parseFloat(parents1[0].id.slice(1)) - parseFloat(parents2[0].id.slice(1));
+	          }
+	        } else if (parents1.length || parents2.length) {
+	          // only one node is a vertex; sort standalone points before vertices
+	          return parents1.length - parents2.length;
+	        } // both nodes are standalone points; sort left to right
 
-	            return !skipped;
-	        }
 
+	        return node1.loc[0] - node2.loc[0];
+	      });
+	      return intersects.map(function (entity) {
+	        return entity.id;
+	      });
+	    }
 
-	        var layer = selection.selectAll('.layer-osm.labels');
-	        layer.selectAll('.labels-group')
-	            .data(['halo', 'label', 'debug'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'labels-group ' + d; });
+	    function pointerup() {
+	      select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
+	      if (!lasso) return;
+	      var ids = lassoed();
+	      lasso.close();
 
-	        var halo = layer.selectAll('.labels-group.halo');
-	        var label = layer.selectAll('.labels-group.label');
-	        var debug = layer.selectAll('.labels-group.debug');
+	      if (ids.length) {
+	        context.enter(modeSelect(context, ids));
+	      }
+	    }
 
-	        // points
-	        drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
-	        drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point);
+	    selection.on(_pointerPrefix + 'down.lasso', pointerdown);
+	  };
 
-	        // lines
-	        drawLinePaths(layer, labelled.line, filter, '', positions.line);
-	        drawLineLabels(label, labelled.line, filter, 'linelabel', positions.line);
-	        drawLineLabels(halo, labelled.line, filter, 'linelabel-halo', positions.line);
+	  behavior.off = function (selection) {
+	    selection.on(_pointerPrefix + 'down.lasso', null);
+	  };
 
-	        // areas
-	        drawAreaLabels(label, labelled.area, filter, 'arealabel', positions.area);
-	        drawAreaLabels(halo, labelled.area, filter, 'arealabel-halo', positions.area);
-	        drawAreaIcons(label, labelled.area, filter, 'areaicon', positions.area);
-	        drawAreaIcons(halo, labelled.area, filter, 'areaicon-halo', positions.area);
+	  return behavior;
+	}
 
-	        // debug
-	        drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
-	        drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
+	function modeBrowse(context) {
+	  var mode = {
+	    button: 'browse',
+	    id: 'browse',
+	    title: _t('modes.browse.title'),
+	    description: _t('modes.browse.description')
+	  };
+	  var sidebar;
 
-	        layer.call(filterLabels);
-	    }
+	  var _selectBehavior;
 
+	  var _behaviors = [];
 
-	    function filterLabels(selection) {
-	        var drawLayer = selection.selectAll('.layer-osm.labels');
-	        var layers = drawLayer.selectAll('.labels-group.halo, .labels-group.label');
+	  mode.selectBehavior = function (val) {
+	    if (!arguments.length) return _selectBehavior;
+	    _selectBehavior = val;
+	    return mode;
+	  };
 
-	        layers.selectAll('.nolabel')
-	            .classed('nolabel', false);
+	  mode.enter = function () {
+	    if (!_behaviors.length) {
+	      if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
+	      _behaviors = [behaviorPaste(context), behaviorHover(context).on('hover', context.ui().sidebar.hover), _selectBehavior, behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+	    }
 
-	        var mouse = context.map().mouse();
-	        var graph = context.graph();
-	        var selectedIDs = context.selectedIDs();
-	        var ids = [];
-	        var pad, bbox;
-
-	        // hide labels near the mouse
-	        if (mouse) {
-	            pad = 20;
-	            bbox = { minX: mouse[0] - pad, minY: mouse[1] - pad, maxX: mouse[0] + pad, maxY: mouse[1] + pad };
-	            var nearMouse = _rdrawn.search(bbox).map(function(entity) { return entity.id; });
-	            ids.push.apply(ids, nearMouse);
-	        }
-
-	        // hide labels on selected nodes (they look weird when dragging / haloed)
-	        for (var i = 0; i < selectedIDs.length; i++) {
-	            var entity = graph.hasEntity(selectedIDs[i]);
-	            if (entity && entity.type === 'node') {
-	                ids.push(selectedIDs[i]);
-	            }
-	        }
+	    _behaviors.forEach(context.install); // Get focus on the body.
 
-	        layers.selectAll(utilEntitySelector(ids))
-	            .classed('nolabel', true);
 
+	    if (document.activeElement && document.activeElement.blur) {
+	      document.activeElement.blur();
+	    }
 
-	        // draw the mouse bbox if debugging is on..
-	        var debug = selection.selectAll('.labels-group.debug');
-	        var gj = [];
-	        if (context.getDebug('collision')) {
-	            gj = bbox ? [{
-	                type: 'Polygon',
-	                coordinates: [[
-	                    [bbox.minX, bbox.minY],
-	                    [bbox.maxX, bbox.minY],
-	                    [bbox.maxX, bbox.maxY],
-	                    [bbox.minX, bbox.maxY],
-	                    [bbox.minX, bbox.minY]
-	                ]]
-	            }] : [];
-	        }
+	    if (sidebar) {
+	      context.ui().sidebar.show(sidebar);
+	    } else {
+	      context.ui().sidebar.select(null);
+	    }
+	  };
 
-	        var box = debug.selectAll('.debug-mouse')
-	            .data(gj);
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
 
-	        // exit
-	        box.exit()
-	            .remove();
+	    _behaviors.forEach(context.uninstall);
 
-	        // enter/update
-	        box.enter()
-	            .append('path')
-	            .attr('class', 'debug debug-mouse yellow')
-	            .merge(box)
-	            .attr('d', d3_geoPath());
+	    if (sidebar) {
+	      context.ui().sidebar.hide();
 	    }
+	  };
 
+	  mode.sidebar = function (_) {
+	    if (!arguments.length) return sidebar;
+	    sidebar = _;
+	    return mode;
+	  };
 
-	    var throttleFilterLabels = throttle(filterLabels, 100);
+	  mode.operations = function () {
+	    return [operationPaste(context)];
+	  };
 
+	  return mode;
+	}
 
-	    drawLabels.observe = function(selection) {
-	        var listener = function() { throttleFilterLabels(selection); };
-	        selection.on('mousemove.hidelabels', listener);
-	        context.on('enter.hidelabels', listener);
-	    };
+	function behaviorAddWay(context) {
+	  var dispatch$1 = dispatch('start', 'startFromWay', 'startFromNode');
+	  var draw = behaviorDraw(context);
 
+	  function behavior(surface) {
+	    draw.on('click', function () {
+	      dispatch$1.apply('start', this, arguments);
+	    }).on('clickWay', function () {
+	      dispatch$1.apply('startFromWay', this, arguments);
+	    }).on('clickNode', function () {
+	      dispatch$1.apply('startFromNode', this, arguments);
+	    }).on('cancel', behavior.cancel).on('finish', behavior.cancel);
+	    context.map().dblclickZoomEnable(false);
+	    surface.call(draw);
+	  }
 
-	    drawLabels.off = function(selection) {
-	        throttleFilterLabels.cancel();
-	        selection.on('mousemove.hidelabels', null);
-	        context.on('enter.hidelabels', null);
-	    };
+	  behavior.off = function (surface) {
+	    surface.call(draw.off);
+	  };
 
+	  behavior.cancel = function () {
+	    window.setTimeout(function () {
+	      context.map().dblclickZoomEnable(true);
+	    }, 1000);
+	    context.enter(modeBrowse(context));
+	  };
 
-	    return drawLabels;
+	  return utilRebind(behavior, dispatch$1, 'on');
 	}
 
-	var _layerEnabled$1 = false;
-	var _qaService$1;
+	function behaviorHash(context) {
+	  // cached window.location.hash
+	  var _cachedHash = null; // allowable latitude range
+
+	  var _latitudeLimit = 90 - 1e-8;
+
+	  function computedHashParameters() {
+	    var map = context.map();
+	    var center = map.center();
+	    var zoom = map.zoom();
+	    var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+	    var oldParams = utilObjectOmit(utilStringQs(window.location.hash), ['comment', 'source', 'hashtags', 'walkthrough']);
+	    var newParams = {};
+	    delete oldParams.id;
+	    var selected = context.selectedIDs().filter(function (id) {
+	      return context.hasEntity(id);
+	    });
 
-	function svgImproveOSM(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-	  var minZoom = 12;
+	    if (selected.length) {
+	      newParams.id = selected.join(',');
+	    }
 
-	  var touchLayer = select(null);
-	  var drawLayer = select(null);
-	  var layerVisible = false;
+	    newParams.map = zoom.toFixed(2) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+	    return Object.assign(oldParams, newParams);
+	  }
 
-	  function markerPath(selection, klass) {
-	    selection
-	      .attr('class', klass)
-	      .attr('transform', 'translate(-10, -28)')
-	      .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	  function computedHash() {
+	    return '#' + utilQsString(computedHashParameters(), true);
 	  }
 
-	  // Loosely-coupled improveOSM service for fetching issues
-	  function getService() {
-	    if (services.improveOSM && !_qaService$1) {
-	      _qaService$1 = services.improveOSM;
-	      _qaService$1.on('loaded', throttledRedraw);
-	    } else if (!services.improveOSM && _qaService$1) {
-	      _qaService$1 = null;
+	  function computedTitle(includeChangeCount) {
+	    var baseTitle = context.documentTitleBase() || 'iD';
+	    var contextual;
+	    var changeCount;
+	    var titleID;
+	    var selected = context.selectedIDs().filter(function (id) {
+	      return context.hasEntity(id);
+	    });
+
+	    if (selected.length) {
+	      var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
+
+	      if (selected.length > 1) {
+	        contextual = _t('title.labeled_and_more', {
+	          labeled: firstLabel,
+	          count: selected.length - 1
+	        });
+	      } else {
+	        contextual = firstLabel;
+	      }
+
+	      titleID = 'context';
 	    }
 
-	    return _qaService$1;
-	  }
+	    if (includeChangeCount) {
+	      changeCount = context.history().difference().summary().length;
 
-	  // Show the markers
-	  function editOn() {
-	    if (!layerVisible) {
-	      layerVisible = true;
-	      drawLayer
-	        .style('display', 'block');
+	      if (changeCount > 0) {
+	        titleID = contextual ? 'changes_context' : 'changes';
+	      }
 	    }
-	  }
 
-	  // Immediately remove the markers and their touch targets
-	  function editOff() {
-	    if (layerVisible) {
-	      layerVisible = false;
-	      drawLayer
-	        .style('display', 'none');
-	      drawLayer.selectAll('.qaItem.improveOSM')
-	        .remove();
-	      touchLayer.selectAll('.qaItem.improveOSM')
-	        .remove();
+	    if (titleID) {
+	      return _t('title.format.' + titleID, {
+	        changes: changeCount,
+	        base: baseTitle,
+	        context: contextual
+	      });
 	    }
+
+	    return baseTitle;
 	  }
 
-	  // Enable the layer.  This shows the markers and transitions them to visible.
-	  function layerOn() {
-	    editOn();
+	  function updateTitle(includeChangeCount) {
+	    if (!context.setsDocumentTitle()) return;
+	    var newTitle = computedTitle(includeChangeCount);
 
-	    drawLayer
-	      .style('opacity', 0)
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 1)
-	      .on('end interrupt', function () { return dispatch.call('change'); });
+	    if (document.title !== newTitle) {
+	      document.title = newTitle;
+	    }
 	  }
 
-	  // Disable the layer.  This transitions the layer invisible and then hides the markers.
-	  function layerOff() {
-	    throttledRedraw.cancel();
-	    drawLayer.interrupt();
-	    touchLayer.selectAll('.qaItem.improveOSM')
-	      .remove();
-
-	    drawLayer
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 0)
-	      .on('end interrupt', function () {
-	        editOff();
-	        dispatch.call('change');
-	      });
-	  }
+	  function updateHashIfNeeded() {
+	    if (context.inIntro()) return;
+	    var latestHash = computedHash();
 
-	  // Update the issue markers
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled$1) { return; }
+	    if (_cachedHash !== latestHash) {
+	      _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
+	      // though unavoidably creating a browser history entry
 
-	    var service = getService();
-	    var selectedID = context.selectedErrorID();
-	    var data = (service ? service.getItems(projection) : []);
-	    var getTransform = svgPointTransform(projection);
+	      window.history.replaceState(null, computedTitle(false
+	      /* includeChangeCount */
+	      ), latestHash); // set the title we want displayed for the browser tab/window
 
-	    // Draw markers..
-	    var markers = drawLayer.selectAll('.qaItem.improveOSM')
-	      .data(data, function (d) { return d.id; });
+	      updateTitle(true
+	      /* includeChangeCount */
+	      );
+	    }
+	  }
 
-	    // exit
-	    markers.exit()
-	      .remove();
+	  var _throttledUpdate = throttle(updateHashIfNeeded, 500);
 
-	    // enter
-	    var markersEnter = markers.enter()
-	      .append('g')
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-	    markersEnter
-	      .append('polygon')
-	        .call(markerPath, 'shadow');
-
-	    markersEnter
-	      .append('ellipse')
-	        .attr('cx', 0)
-	        .attr('cy', 0)
-	        .attr('rx', 4.5)
-	        .attr('ry', 2)
-	        .attr('class', 'stroke');
-
-	    markersEnter
-	      .append('polygon')
-	        .attr('fill', 'currentColor')
-	        .call(markerPath, 'qaItem-fill');
-
-	    markersEnter
-	      .append('use')
-	        .attr('transform', 'translate(-6.5, -23)')
-	        .attr('class', 'icon-annotation')
-	        .attr('width', '13px')
-	        .attr('height', '13px')
-	        .attr('xlink:href', function (d) {
-	          var picon = d.icon;
-
-	          if (!picon) {
-	          return '';
-	          } else {
-	          var isMaki = /^maki-/.test(picon);
-	          return ("#" + picon + (isMaki ? '-11' : ''));
-	          }
+	  var _throttledUpdateTitle = throttle(function () {
+	    updateTitle(true
+	    /* includeChangeCount */
+	    );
+	  }, 500);
+
+	  function hashchange() {
+	    // ignore spurious hashchange events
+	    if (window.location.hash === _cachedHash) return;
+	    _cachedHash = window.location.hash;
+	    var q = utilStringQs(_cachedHash);
+	    var mapArgs = (q.map || '').split('/').map(Number);
+
+	    if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
+	      // replace bogus hash
+	      updateHashIfNeeded();
+	    } else {
+	      // don't update if the new hash already reflects the state of iD
+	      if (_cachedHash === computedHash()) return;
+	      var mode = context.mode();
+	      context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);
+
+	      if (q.id && mode) {
+	        var ids = q.id.split(',').filter(function (id) {
+	          return context.hasEntity(id);
 	        });
 
-	    // update
-	    markers
-	      .merge(markersEnter)
-	      .sort(sortY)
-	        .classed('selected', function (d) { return d.id === selectedID; })
-	        .attr('transform', getTransform);
-
-
-	    // Draw targets..
-	    if (touchLayer.empty()) { return; }
-	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	        if (ids.length && (mode.id === 'browse' || mode.id === 'select' && !utilArrayIdentical(mode.selectedIDs(), ids))) {
+	          context.enter(modeSelect(context, ids));
+	          return;
+	        }
+	      }
 
-	    var targets = touchLayer.selectAll('.qaItem.improveOSM')
-	      .data(data, function (d) { return d.id; });
-
-	    // exit
-	    targets.exit()
-	      .remove();
-
-	    // enter/update
-	    targets.enter()
-	      .append('rect')
-	        .attr('width', '20px')
-	        .attr('height', '30px')
-	        .attr('x', '-10px')
-	        .attr('y', '-28px')
-	      .merge(targets)
-	      .sort(sortY)
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " target " + fillClass + " itemId-" + (d.id)); })
-	        .attr('transform', getTransform);
+	      var center = context.map().center();
+	      var dist = geoSphericalDistance(center, [mapArgs[2], mapArgs[1]]);
+	      var maxdist = 500; // Don't allow the hash location to change too much while drawing
+	      // This can happen if the user accidentally hit the back button.  #3996
 
-	    function sortY(a, b) {
-	      return (a.id === selectedID) ? 1
-	        : (b.id === selectedID) ? -1
-	        : b.loc[1] - a.loc[1];
+	      if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
+	        context.enter(modeBrowse(context));
+	        return;
+	      }
 	    }
 	  }
 
-	  // Draw the ImproveOSM layer and schedule loading issues and updating markers.
-	  function drawImproveOSM(selection) {
-	    var service = getService();
-
-	    var surface = context.surface();
-	    if (surface && !surface.empty()) {
-	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	    }
+	  function behavior() {
+	    context.map().on('move.behaviorHash', _throttledUpdate);
+	    context.history().on('change.behaviorHash', _throttledUpdateTitle);
+	    context.on('enter.behaviorHash', _throttledUpdate);
+	    select(window).on('hashchange.behaviorHash', hashchange);
 
-	    drawLayer = selection.selectAll('.layer-improveOSM')
-	      .data(service ? [0] : []);
+	    if (window.location.hash) {
+	      var q = utilStringQs(window.location.hash);
 
-	    drawLayer.exit()
-	      .remove();
+	      if (q.id) {
+	        //if (!context.history().hasRestorableChanges()) {
+	        // targeting specific features: download, select, and zoom to them
+	        context.zoomToEntity(q.id.split(',')[0], !q.map); //}
+	      }
 
-	    drawLayer = drawLayer.enter()
-	      .append('g')
-	        .attr('class', 'layer-improveOSM')
-	        .style('display', _layerEnabled$1 ? 'block' : 'none')
-	      .merge(drawLayer);
+	      if (q.walkthrough === 'true') {
+	        behavior.startWalkthrough = true;
+	      }
 
-	    if (_layerEnabled$1) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        service.loadIssues(projection);
-	        updateMarkers();
-	      } else {
-	        editOff();
+	      if (q.map) {
+	        behavior.hadHash = true;
 	      }
+
+	      hashchange();
+	      updateTitle(false);
 	    }
 	  }
 
-	  // Toggles the layer on and off
-	  drawImproveOSM.enabled = function(val) {
-	    if (!arguments.length) { return _layerEnabled$1; }
+	  behavior.off = function () {
+	    _throttledUpdate.cancel();
 
-	    _layerEnabled$1 = val;
-	    if (_layerEnabled$1) {
-	      layerOn();
-	    } else {
-	      layerOff();
-	      if (context.selectedErrorID()) {
-	        context.enter(modeBrowse(context));
-	      }
-	    }
+	    _throttledUpdateTitle.cancel();
 
-	    dispatch.call('change');
-	    return this;
+	    context.map().on('move.behaviorHash', null);
+	    context.on('enter.behaviorHash', null);
+	    select(window).on('hashchange.behaviorHash', null);
+	    window.location.hash = '';
 	  };
 
-	  drawImproveOSM.supported = function () { return !!getService(); };
-
-	  return drawImproveOSM;
+	  return behavior;
 	}
 
-	var _layerEnabled$2 = false;
-	var _qaService$2;
+	/*
+	    iD.coreDifference represents the difference between two graphs.
+	    It knows how to calculate the set of entities that were
+	    created, modified, or deleted, and also contains the logic
+	    for recursively extending a difference to the complete set
+	    of entities that will require a redraw, taking into account
+	    child and parent relationships.
+	 */
 
-	function svgOsmose(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-	  var minZoom = 12;
+	function coreDifference(base, head) {
+	  var _changes = {};
+	  var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'
 
-	  var touchLayer = select(null);
-	  var drawLayer = select(null);
-	  var layerVisible = false;
+	  var _diff = {};
 
-	  function markerPath(selection, klass) {
-	    selection
-	      .attr('class', klass)
-	      .attr('transform', 'translate(-10, -28)')
-	      .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-	  }
+	  function checkEntityID(id) {
+	    var h = head.entities[id];
+	    var b = base.entities[id];
+	    if (h === b) return;
+	    if (_changes[id]) return;
 
-	  // Loosely-coupled osmose service for fetching issues
-	  function getService() {
-	    if (services.osmose && !_qaService$2) {
-	      _qaService$2 = services.osmose;
-	      _qaService$2.on('loaded', throttledRedraw);
-	    } else if (!services.osmose && _qaService$2) {
-	      _qaService$2 = null;
+	    if (!h && b) {
+	      _changes[id] = {
+	        base: b,
+	        head: h
+	      };
+	      _didChange.deletion = true;
+	      return;
 	    }
 
-	    return _qaService$2;
-	  }
-
-	  // Show the markers
-	  function editOn() {
-	    if (!layerVisible) {
-	      layerVisible = true;
-	      drawLayer
-	        .style('display', 'block');
+	    if (h && !b) {
+	      _changes[id] = {
+	        base: b,
+	        head: h
+	      };
+	      _didChange.addition = true;
+	      return;
 	    }
-	  }
 
-	  // Immediately remove the markers and their touch targets
-	  function editOff() {
-	    if (layerVisible) {
-	      layerVisible = false;
-	      drawLayer
-	        .style('display', 'none');
-	      drawLayer.selectAll('.qaItem.osmose')
-	        .remove();
-	      touchLayer.selectAll('.qaItem.osmose')
-	        .remove();
-	    }
-	  }
+	    if (h && b) {
+	      if (h.members && b.members && !fastDeepEqual(h.members, b.members)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.geometry = true;
+	        _didChange.properties = true;
+	        return;
+	      }
 
-	  // Enable the layer.  This shows the markers and transitions them to visible.
-	  function layerOn() {
-	    editOn();
+	      if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.geometry = true;
+	      }
 
-	    drawLayer
-	      .style('opacity', 0)
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 1)
-	      .on('end interrupt', function () { return dispatch.call('change'); });
-	  }
+	      if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.geometry = true;
+	      }
 
-	  // Disable the layer.  This transitions the layer invisible and then hides the markers.
-	  function layerOff() {
-	    throttledRedraw.cancel();
-	    drawLayer.interrupt();
-	    touchLayer.selectAll('.qaItem.osmose')
-	      .remove();
-
-	    drawLayer
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 0)
-	      .on('end interrupt', function () {
-	        editOff();
-	        dispatch.call('change');
-	      });
+	      if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.properties = true;
+	      }
+	    }
 	  }
 
-	  // Update the issue markers
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled$2) { return; }
-
-	    var service = getService();
-	    var selectedID = context.selectedErrorID();
-	    var data = (service ? service.getItems(projection) : []);
-	    var getTransform = svgPointTransform(projection);
-
-	    // Draw markers..
-	    var markers = drawLayer.selectAll('.qaItem.osmose')
-	      .data(data, function (d) { return d.id; });
-
-	    // exit
-	    markers.exit()
-	      .remove();
-
-	    // enter
-	    var markersEnter = markers.enter()
-	      .append('g')
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-	    markersEnter
-	      .append('polygon')
-	        .call(markerPath, 'shadow');
-
-	    markersEnter
-	      .append('ellipse')
-	        .attr('cx', 0)
-	        .attr('cy', 0)
-	        .attr('rx', 4.5)
-	        .attr('ry', 2)
-	        .attr('class', 'stroke');
-
-	    markersEnter
-	      .append('polygon')
-	        .attr('fill', function (d) { return service.getColor(d.item); })
-	        .call(markerPath, 'qaItem-fill');
-
-	    markersEnter
-	      .append('use')
-	        .attr('transform', 'translate(-6.5, -23)')
-	        .attr('class', 'icon-annotation')
-	        .attr('width', '13px')
-	        .attr('height', '13px')
-	        .attr('xlink:href', function (d) {
-	          var picon = d.icon;
-
-	          if (!picon) {
-	            return '';
-	          } else {
-	            var isMaki = /^maki-/.test(picon);
-	            return ("#" + picon + (isMaki ? '-11' : ''));
-	          }
-	        });
-
-	    // update
-	    markers
-	      .merge(markersEnter)
-	      .sort(sortY)
-	        .classed('selected', function (d) { return d.id === selectedID; })
-	        .attr('transform', getTransform);
-
-	    // Draw targets..
-	    if (touchLayer.empty()) { return; }
-	    var fillClass = context.getDebug('target') ? 'pink' : 'nocolor';
-
-	    var targets = touchLayer.selectAll('.qaItem.osmose')
-	      .data(data, function (d) { return d.id; });
-
-	    // exit
-	    targets.exit()
-	      .remove();
-
-	    // enter/update
-	    targets.enter()
-	      .append('rect')
-	        .attr('width', '20px')
-	        .attr('height', '30px')
-	        .attr('x', '-10px')
-	        .attr('y', '-28px')
-	      .merge(targets)
-	      .sort(sortY)
-	        .attr('class', function (d) { return ("qaItem " + (d.service) + " target " + fillClass + " itemId-" + (d.id)); })
-	        .attr('transform', getTransform);
+	  function load() {
+	    // HOT CODE: there can be many thousands of downloaded entities, so looping
+	    // through them all can become a performance bottleneck. Optimize by
+	    // resolving duplicates and using a basic `for` loop
+	    var ids = utilArrayUniq(Object.keys(head.entities).concat(Object.keys(base.entities)));
 
-	    function sortY(a, b) {
-	      return (a.id === selectedID) ? 1
-	        : (b.id === selectedID) ? -1
-	        : b.loc[1] - a.loc[1];
+	    for (var i = 0; i < ids.length; i++) {
+	      checkEntityID(ids[i]);
 	    }
 	  }
 
-	  // Draw the Osmose layer and schedule loading issues and updating markers.
-	  function drawOsmose(selection) {
-	    var service = getService();
-
-	    var surface = context.surface();
-	    if (surface && !surface.empty()) {
-	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	    }
+	  load();
 
-	    drawLayer = selection.selectAll('.layer-osmose')
-	      .data(service ? [0] : []);
+	  _diff.length = function length() {
+	    return Object.keys(_changes).length;
+	  };
 
-	    drawLayer.exit()
-	      .remove();
+	  _diff.changes = function changes() {
+	    return _changes;
+	  };
 
-	    drawLayer = drawLayer.enter()
-	      .append('g')
-	        .attr('class', 'layer-osmose')
-	        .style('display', _layerEnabled$2 ? 'block' : 'none')
-	      .merge(drawLayer);
+	  _diff.didChange = _didChange; // pass true to include affected relation members
 
-	    if (_layerEnabled$2) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        service.loadIssues(projection);
-	        updateMarkers();
-	      } else {
-	        editOff();
+	  _diff.extantIDs = function extantIDs(includeRelMembers) {
+	    var result = new Set();
+	    Object.keys(_changes).forEach(function (id) {
+	      if (_changes[id].head) {
+	        result.add(id);
 	      }
-	    }
-	  }
-
-	  // Toggles the layer on and off
-	  drawOsmose.enabled = function(val) {
-	    if (!arguments.length) { return _layerEnabled$2; }
 
-	    _layerEnabled$2 = val;
-	    if (_layerEnabled$2) {
-	      // Strings supplied by Osmose fetched before showing layer for first time
-	      // NOTE: Currently no way to change locale in iD at runtime, would need to re-call this method if that's ever implemented
-	      // Also, If layer is toggled quickly multiple requests are sent
-	      getService().loadStrings()
-	        .then(layerOn)
-	        .catch(function (err) {
-	          console.log(err); // eslint-disable-line no-console
+	      var h = _changes[id].head;
+	      var b = _changes[id].base;
+	      var entity = h || b;
+
+	      if (includeRelMembers && entity.type === 'relation') {
+	        var mh = h ? h.members.map(function (m) {
+	          return m.id;
+	        }) : [];
+	        var mb = b ? b.members.map(function (m) {
+	          return m.id;
+	        }) : [];
+	        utilArrayUnion(mh, mb).forEach(function (memberID) {
+	          if (head.hasEntity(memberID)) {
+	            result.add(memberID);
+	          }
 	        });
-	    } else {
-	      layerOff();
-	      if (context.selectedErrorID()) {
-	        context.enter(modeBrowse(context));
 	      }
-	    }
-
-	    dispatch.call('change');
-	    return this;
+	    });
+	    return Array.from(result);
 	  };
 
-	  drawOsmose.supported = function () { return !!getService(); };
-
-	  return drawOsmose;
-	}
-
-	function svgStreetside(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 14;
-	    var minMarkerZoom = 16;
-	    var minViewfieldZoom = 18;
-	    var layer = select(null);
-	    var _viewerYaw = 0;
-	    var _selectedSequence = null;
-	    var _streetside;
-
-	    /**
-	     * init().
-	     */
-	    function init() {
-	        if (svgStreetside.initialized) { return; }  // run once
-	        svgStreetside.enabled = false;
-	        svgStreetside.initialized = true;
-	    }
-
-	    /**
-	     * getService().
-	     */
-	    function getService() {
-	        if (services.streetside && !_streetside) {
-	            _streetside = services.streetside;
-	            _streetside.event
-	                .on('viewerChanged.svgStreetside', viewerChanged)
-	                .on('loadedBubbles.svgStreetside', throttledRedraw);
-	        } else if (!services.streetside && _streetside) {
-	            _streetside = null;
-	        }
-
-	        return _streetside;
-	    }
-
-	    /**
-	     * showLayer().
-	     */
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
-
-	        editOn();
-
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
-	    }
+	  _diff.modified = function modified() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (change.base && change.head) {
+	        result.push(change.head);
+	      }
+	    });
+	    return result;
+	  };
 
-	    /**
-	     * hideLayer().
-	     */
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	  _diff.created = function created() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (!change.base && change.head) {
+	        result.push(change.head);
+	      }
+	    });
+	    return result;
+	  };
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', editOff);
-	    }
+	  _diff.deleted = function deleted() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (change.base && !change.head) {
+	        result.push(change.base);
+	      }
+	    });
+	    return result;
+	  };
 
-	    /**
-	     * editOn().
-	     */
-	    function editOn() {
-	        layer.style('display', 'block');
-	    }
+	  _diff.summary = function summary() {
+	    var relevant = {};
+	    var keys = Object.keys(_changes);
 
-	    /**
-	     * editOff().
-	     */
-	    function editOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
-	    }
+	    for (var i = 0; i < keys.length; i++) {
+	      var change = _changes[keys[i]];
 
-	    /**
-	     * click() Handles 'bubble' point click event.
-	     */
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	      if (change.head && change.head.geometry(head) !== 'vertex') {
+	        addEntity(change.head, head, change.base ? 'modified' : 'created');
+	      } else if (change.base && change.base.geometry(base) !== 'vertex') {
+	        addEntity(change.base, base, 'deleted');
+	      } else if (change.base && change.head) {
+	        // modified vertex
+	        var moved = !fastDeepEqual(change.base.loc, change.head.loc);
+	        var retagged = !fastDeepEqual(change.base.tags, change.head.tags);
 
-	        // try to preserve the viewer rotation when staying on the same sequence
-	        if (d.sequenceKey !== _selectedSequence) {
-	            _viewerYaw = 0;  // reset
+	        if (moved) {
+	          addParents(change.head);
 	        }
-	        _selectedSequence = d.sequenceKey;
 
-	        service
-	            .selectImage(context, d)
-	            .then(function (response) {
-	                if (response.status === 'ok'){
-	                    service.showViewer(context, _viewerYaw);
-	                }
-	            });
+	        if (retagged || moved && change.head.hasInterestingTags()) {
+	          addEntity(change.head, head, 'modified');
+	        }
+	      } else if (change.head && change.head.hasInterestingTags()) {
+	        // created vertex
+	        addEntity(change.head, head, 'created');
+	      } else if (change.base && change.base.hasInterestingTags()) {
+	        // deleted vertex
+	        addEntity(change.base, base, 'deleted');
+	      }
+	    }
 
+	    return Object.values(relevant);
 
-	        context.map().centerEase(d.loc);
+	    function addEntity(entity, graph, changeType) {
+	      relevant[entity.id] = {
+	        entity: entity,
+	        graph: graph,
+	        changeType: changeType
+	      };
 	    }
 
-	    /**
-	     * mouseover().
-	     */
-	    function mouseover(d) {
-	        var service = getService();
-	        if (service) { service.setStyles(context, d); }
-	    }
+	    function addParents(entity) {
+	      var parents = head.parentWays(entity);
 
-	    /**
-	     * mouseout().
-	     */
-	    function mouseout() {
-	        var service = getService();
-	        if (service) { service.setStyles(context, null); }
-	    }
+	      for (var j = parents.length - 1; j >= 0; j--) {
+	        var parent = parents[j];
 
-	    /**
-	     * transform().
-	     */
-	    function transform(d) {
-	        var t = svgPointTransform(projection)(d);
-	        var rot = d.ca + _viewerYaw;
-	        if (rot) {
-	            t += ' rotate(' + Math.floor(rot) + ',0,0)';
+	        if (!(parent.id in relevant)) {
+	          addEntity(parent, head, 'modified');
 	        }
-	        return t;
+	      }
 	    }
+	  }; // returns complete set of entities that require a redraw
+	  //  (optionally within given `extent`)
 
 
-	    function viewerChanged() {
-	        var service = getService();
-	        if (!service) { return; }
+	  _diff.complete = function complete(extent) {
+	    var result = {};
+	    var id, change;
 
-	        var viewer = service.viewer();
-	        if (!viewer) { return; }
+	    for (id in _changes) {
+	      change = _changes[id];
+	      var h = change.head;
+	      var b = change.base;
+	      var entity = h || b;
+	      var i;
+	      if (extent && (!h || !h.intersects(extent, head)) && (!b || !b.intersects(extent, base))) continue;
+	      result[id] = h;
 
-	        // update viewfield rotation
-	        _viewerYaw = viewer.getYaw();
+	      if (entity.type === 'way') {
+	        var nh = h ? h.nodes : [];
+	        var nb = b ? b.nodes : [];
+	        var diff;
+	        diff = utilArrayDifference(nh, nb);
 
-	        // avoid updating if the map is currently transformed
-	        // e.g. during drags or easing.
-	        if (context.map().isTransformed()) { return; }
+	        for (i = 0; i < diff.length; i++) {
+	          result[diff[i]] = head.hasEntity(diff[i]);
+	        }
 
-	        layer.selectAll('.viewfield-group.currentView')
-	            .attr('transform', transform);
-	    }
+	        diff = utilArrayDifference(nb, nh);
 
+	        for (i = 0; i < diff.length; i++) {
+	          result[diff[i]] = head.hasEntity(diff[i]);
+	        }
+	      }
 
-	    context.photos().on('change.streetside', update);
+	      if (entity.type === 'relation' && entity.isMultipolygon()) {
+	        var mh = h ? h.members.map(function (m) {
+	          return m.id;
+	        }) : [];
+	        var mb = b ? b.members.map(function (m) {
+	          return m.id;
+	        }) : [];
+	        var ids = utilArrayUnion(mh, mb);
 
-	    /**
-	     * update().
-	     */
-	    function update() {
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
-	        var z = ~~context.map().zoom();
-	        var showMarkers = (z >= minMarkerZoom);
-	        var showViewfields = (z >= minViewfieldZoom);
-	        var service = getService();
+	        for (i = 0; i < ids.length; i++) {
+	          var member = head.hasEntity(ids[i]);
+	          if (!member) continue; // not downloaded
 
-	        var sequences = [];
-	        var bubbles = [];
+	          if (extent && !member.intersects(extent, head)) continue; // not visible
 
-	        if (context.photos().showsPanoramic()) {
-	            sequences = (service ? service.sequences(projection) : []);
-	            bubbles = (service && showMarkers ? service.bubbles(projection) : []);
+	          result[ids[i]] = member;
 	        }
+	      }
+
+	      addParents(head.parentWays(entity), result);
+	      addParents(head.parentRelations(entity), result);
+	    }
 
-	        var traces = layer.selectAll('.sequences').selectAll('.sequence')
-	            .data(sequences, function(d) { return d.properties.key; });
+	    return result;
 
-	        // exit
-	        traces.exit()
-	            .remove();
+	    function addParents(parents, result) {
+	      for (var i = 0; i < parents.length; i++) {
+	        var parent = parents[i];
+	        if (parent.id in result) continue;
+	        result[parent.id] = parent;
+	        addParents(head.parentRelations(parent), result);
+	      }
+	    }
+	  };
 
-	        // enter/update
-	        traces = traces.enter()
-	            .append('path')
-	            .attr('class', 'sequence')
-	            .merge(traces)
-	            .attr('d', svgPath(projection).geojson);
+	  return _diff;
+	}
 
+	function coreTree(head) {
+	  // tree for entities
+	  var _rtree = new RBush();
 
-	        var groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-	            .data(bubbles, function(d) {
-	                // force reenter once bubbles are attached to a sequence
-	                return d.key + (d.sequenceKey ? 'v1' : 'v0');
-	            });
+	  var _bboxes = {}; // maintain a separate tree for granular way segments
 
-	        // exit
-	        groups.exit()
-	            .remove();
-
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'viewfield-group')
-	            .on('mouseenter', mouseover)
-	            .on('mouseleave', mouseout)
-	            .on('click', click);
-
-	        groupsEnter
-	            .append('g')
-	            .attr('class', 'viewfield-scale');
-
-	        // update
-	        var markers = groups
-	            .merge(groupsEnter)
-	            .sort(function(a, b) {
-	                return (a === selected) ? 1
-	                    : (b === selected) ? -1
-	                    : b.loc[1] - a.loc[1];
-	            })
-	            .attr('transform', transform)
-	            .select('.viewfield-scale');
-
-
-	        markers.selectAll('circle')
-	            .data([0])
-	            .enter()
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('r', '6');
-
-	        var viewfields = markers.selectAll('.viewfield')
-	            .data(showViewfields ? [0] : []);
-
-	        viewfields.exit()
-	            .remove();
-
-	        // viewfields may or may not be drawn...
-	        // but if they are, draw below the circles
-	        viewfields.enter()
-	            .insert('path', 'circle')
-	            .attr('class', 'viewfield')
-	            .attr('transform', 'scale(1.5,1.5),translate(-8, -13)')
-	            .attr('d', viewfieldPath);
-
-	        function viewfieldPath() {
-	            var d = this.parentNode.__data__;
-	            if (d.pano) {
-	                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	            } else {
-	                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-	            }
-	        }
+	  var _segmentsRTree = new RBush();
 
-	    }
+	  var _segmentsBBoxes = {};
+	  var _segmentsByWayId = {};
+	  var tree = {};
 
-	    /**
-	     * drawImages()
-	     * drawImages is the method that is returned (and that runs) everytime 'svgStreetside()' is called.
-	     * 'svgStreetside()' is called from index.js
-	     */
-	    function drawImages(selection) {
-	        var enabled = svgStreetside.enabled;
-	        var service = getService();
+	  function entityBBox(entity) {
+	    var bbox = entity.extent(head).bbox();
+	    bbox.id = entity.id;
+	    _bboxes[entity.id] = bbox;
+	    return bbox;
+	  }
 
-	        layer = selection.selectAll('.layer-streetside-images')
-	            .data(service ? [0] : []);
+	  function segmentBBox(segment) {
+	    var extent = segment.extent(head); // extent can be null if the node entities aren't in the graph for some reason
 
-	        layer.exit()
-	            .remove();
+	    if (!extent) return null;
+	    var bbox = extent.bbox();
+	    bbox.segment = segment;
+	    _segmentsBBoxes[segment.id] = bbox;
+	    return bbox;
+	  }
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-streetside-images')
-	            .style('display', enabled ? 'block' : 'none');
+	  function removeEntity(entity) {
+	    _rtree.remove(_bboxes[entity.id]);
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'sequences');
+	    delete _bboxes[entity.id];
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'markers');
+	    if (_segmentsByWayId[entity.id]) {
+	      _segmentsByWayId[entity.id].forEach(function (segment) {
+	        _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
 
-	        layer = layerEnter
-	            .merge(layer);
+	        delete _segmentsBBoxes[segment.id];
+	      });
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadBubbles(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	      delete _segmentsByWayId[entity.id];
 	    }
+	  }
 
+	  function loadEntities(entities) {
+	    _rtree.load(entities.map(entityBBox));
 
-	    /**
-	     * drawImages.enabled().
-	     */
-	    drawImages.enabled = function(_) {
-	        if (!arguments.length) { return svgStreetside.enabled; }
-	        svgStreetside.enabled = _;
-	        if (svgStreetside.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
+	    var segments = [];
+	    entities.forEach(function (entity) {
+	      if (entity.segments) {
+	        var entitySegments = entity.segments(head); // cache these to make them easy to remove later
 
-	    /**
-	     * drawImages.supported().
-	     */
-	    drawImages.supported = function() {
-	        return !!getService();
-	    };
+	        _segmentsByWayId[entity.id] = entitySegments;
+	        segments = segments.concat(entitySegments);
+	      }
+	    });
+	    if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
+	  }
 
-	    init();
+	  function updateParents(entity, insertions, memo) {
+	    head.parentWays(entity).forEach(function (way) {
+	      if (_bboxes[way.id]) {
+	        removeEntity(way);
+	        insertions[way.id] = way;
+	      }
 
-	    return drawImages;
-	}
+	      updateParents(way, insertions, memo);
+	    });
+	    head.parentRelations(entity).forEach(function (relation) {
+	      if (memo[entity.id]) return;
+	      memo[entity.id] = true;
 
-	function svgMapillaryImages(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var minMarkerZoom = 16;
-	    var minViewfieldZoom = 18;
-	    var layer = select(null);
-	    var _mapillary;
-	    var viewerCompassAngle;
-
-
-	    function init() {
-	        if (svgMapillaryImages.initialized) { return; }  // run once
-	        svgMapillaryImages.enabled = false;
-	        svgMapillaryImages.initialized = true;
-	    }
-
-
-	    function getService() {
-	        if (services.mapillary && !_mapillary) {
-	            _mapillary = services.mapillary;
-	            _mapillary.event.on('loadedImages', throttledRedraw);
-	            _mapillary.event.on('bearingChanged', function(e) {
-	                viewerCompassAngle = e;
-
-	                // avoid updating if the map is currently transformed
-	                // e.g. during drags or easing.
-	                if (context.map().isTransformed()) { return; }
-
-	                layer.selectAll('.viewfield-group.currentView')
-	                    .filter(function(d) {
-	                        return d.pano;
-	                    })
-	                    .attr('transform', transform);
-	            });
-	        } else if (!services.mapillary && _mapillary) {
-	            _mapillary = null;
-	        }
+	      if (_bboxes[relation.id]) {
+	        removeEntity(relation);
+	        insertions[relation.id] = relation;
+	      }
 
-	        return _mapillary;
-	    }
+	      updateParents(relation, insertions, memo);
+	    });
+	  }
 
+	  tree.rebase = function (entities, force) {
+	    var insertions = {};
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (!entity.visible) continue;
 
-	        editOn();
+	      if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
+	        if (!force) {
+	          continue;
+	        } else if (_bboxes[entity.id]) {
+	          removeEntity(entity);
+	        }
+	      }
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
+	      insertions[entity.id] = entity;
+	      updateParents(entity, insertions, {});
 	    }
 
+	    loadEntities(Object.values(insertions));
+	    return tree;
+	  };
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	  function updateToGraph(graph) {
+	    if (graph === head) return;
+	    var diff = coreDifference(head, graph);
+	    head = graph;
+	    var changed = diff.didChange;
+	    if (!changed.addition && !changed.deletion && !changed.geometry) return;
+	    var insertions = {};
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', editOff);
+	    if (changed.deletion) {
+	      diff.deleted().forEach(function (entity) {
+	        removeEntity(entity);
+	      });
 	    }
 
+	    if (changed.geometry) {
+	      diff.modified().forEach(function (entity) {
+	        removeEntity(entity);
+	        insertions[entity.id] = entity;
+	        updateParents(entity, insertions, {});
+	      });
+	    }
 
-	    function editOn() {
-	        layer.style('display', 'block');
+	    if (changed.addition) {
+	      diff.created().forEach(function (entity) {
+	        insertions[entity.id] = entity;
+	      });
 	    }
 
+	    loadEntities(Object.values(insertions));
+	  } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
 
-	    function editOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
-	    }
 
+	  tree.intersects = function (extent, graph) {
+	    updateToGraph(graph);
+	    return _rtree.search(extent.bbox()).map(function (bbox) {
+	      return graph.entity(bbox.id);
+	    });
+	  }; // returns an array of segment objects with bounding boxes overlapping `extent` for the given `graph`
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
 
-	        service
-	            .selectImage(context, d.key)
-	            .updateViewer(context, d.key)
-	            .showViewer(context);
+	  tree.waySegments = function (extent, graph) {
+	    updateToGraph(graph);
+	    return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
+	      return bbox.segment;
+	    });
+	  };
 
-	        context.map().centerEase(d.loc);
-	    }
+	  return tree;
+	}
 
+	function uiModal(selection, blocking) {
+	  var _this = this;
 
-	    function mouseover(d) {
-	        var service = getService();
-	        if (service) { service.setStyles(context, d); }
-	    }
+	  var keybinding = utilKeybinding('modal');
+	  var previous = selection.select('div.modal');
+	  var animate = previous.empty();
+	  previous.transition().duration(200).style('opacity', 0).remove();
+	  var shaded = selection.append('div').attr('class', 'shaded').style('opacity', 0);
 
+	  shaded.close = function () {
+	    shaded.transition().duration(200).style('opacity', 0).remove();
+	    modal.transition().duration(200).style('top', '0px');
+	    select(document).call(keybinding.unbind);
+	  };
 
-	    function mouseout() {
-	        var service = getService();
-	        if (service) { service.setStyles(context, null); }
-	    }
+	  var modal = shaded.append('div').attr('class', 'modal fillL');
+	  modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);
 
+	  if (!blocking) {
+	    shaded.on('click.remove-modal', function (d3_event) {
+	      if (d3_event.target === _this) {
+	        shaded.close();
+	      }
+	    });
+	    modal.append('button').attr('class', 'close').on('click', shaded.close).call(svgIcon('#iD-icon-close'));
+	    keybinding.on('⌫', shaded.close).on('⎋', shaded.close);
+	    select(document).call(keybinding);
+	  }
 
-	    function transform(d) {
-	        var t = svgPointTransform(projection)(d);
-	        if (d.pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
-	            t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
-	        } else if (d.ca) {
-	            t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
-	        }
-	        return t;
-	    }
+	  modal.append('div').attr('class', 'content');
+	  modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);
 
-	    context.photos().on('change.mapillary_images', update);
+	  if (animate) {
+	    shaded.transition().style('opacity', 1);
+	  } else {
+	    shaded.style('opacity', 1);
+	  }
 
-	    function filterImages(images) {
-	        var showsPano = context.photos().showsPanoramic();
-	        var showsFlat = context.photos().showsFlat();
-	        if (!showsPano || !showsFlat) {
-	            images = images.filter(function(image) {
-	                if (image.pano) { return showsPano; }
-	                return showsFlat;
-	            });
-	        }
-	        return images;
-	    }
-
-	    function filterSequences(sequences, service) {
-	        var showsPano = context.photos().showsPanoramic();
-	        var showsFlat = context.photos().showsFlat();
-	        if (!showsPano || !showsFlat) {
-	            sequences = sequences.filter(function(sequence) {
-	                if (sequence.properties.hasOwnProperty('pano')) {
-	                    if (sequence.properties.pano) { return showsPano; }
-	                    return showsFlat;
-	                } else {
-	                    // if the sequence doesn't specify pano or not, search its images
-	                    var cProps = sequence.properties.coordinateProperties;
-	                    if (cProps && cProps.image_keys && cProps.image_keys.length > 0) {
-	                        for (var index in cProps.image_keys) {
-	                            var imageKey = cProps.image_keys[index];
-	                            var image = service.cachedImage(imageKey);
-	                            if (image && image.hasOwnProperty('pano')) {
-	                                if (image.pano) { return showsPano; }
-	                                return showsFlat;
-	                            }
-	                        }
-	                    }
-	                }
-	            });
-	        }
-	        return sequences;
-	    }
+	  return shaded;
 
-	    function update() {
+	  function moveFocusToFirst() {
+	    var node = modal // there are additional rules about what's focusable, but this suits our purposes
+	    .select('a, button, input:not(.keytrap), select, textarea').node();
 
-	        var z = ~~context.map().zoom();
-	        var showMarkers = (z >= minMarkerZoom);
-	        var showViewfields = (z >= minViewfieldZoom);
-
-	        var service = getService();
-	        var selectedKey = service && service.getSelectedImageKey();
-	        var sequences = (service ? service.sequences(projection) : []);
-	        var images = (service && showMarkers ? service.images(projection) : []);
-
-	        images = filterImages(images);
-	        sequences = filterSequences(sequences, service);
-
-	        var traces = layer.selectAll('.sequences').selectAll('.sequence')
-	            .data(sequences, function(d) { return d.properties.key; });
-
-	        // exit
-	        traces.exit()
-	            .remove();
-
-	        // enter/update
-	        traces = traces.enter()
-	            .append('path')
-	            .attr('class', 'sequence')
-	            .merge(traces)
-	            .attr('d', svgPath(projection).geojson);
-
-
-	        var groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-	            .data(images, function(d) { return d.key; });
-
-	        // exit
-	        groups.exit()
-	            .remove();
-
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'viewfield-group')
-	            .on('mouseenter', mouseover)
-	            .on('mouseleave', mouseout)
-	            .on('click', click);
-
-	        groupsEnter
-	            .append('g')
-	            .attr('class', 'viewfield-scale');
-
-	        // update
-	        var markers = groups
-	            .merge(groupsEnter)
-	            .sort(function(a, b) {
-	                return (a.key === selectedKey) ? 1
-	                    : (b.key === selectedKey) ? -1
-	                    : b.loc[1] - a.loc[1];  // sort Y
-	            })
-	            .attr('transform', transform)
-	            .select('.viewfield-scale');
-
-
-	        markers.selectAll('circle')
-	            .data([0])
-	            .enter()
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('r', '6');
-
-	        var viewfields = markers.selectAll('.viewfield')
-	            .data(showViewfields ? [0] : []);
-
-	        viewfields.exit()
-	            .remove();
-
-	        viewfields.enter()               // viewfields may or may not be drawn...
-	            .insert('path', 'circle')    // but if they are, draw below the circles
-	            .attr('class', 'viewfield')
-	            .classed('pano', function() { return this.parentNode.__data__.pano; })
-	            .attr('transform', 'scale(1.5,1.5),translate(-8, -13)')
-	            .attr('d', viewfieldPath);
-
-	        function viewfieldPath() {
-	            var d = this.parentNode.__data__;
-	            if (d.pano) {
-	                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-	            } else {
-	                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-	            }
-	        }
+	    if (node) {
+	      node.focus();
+	    } else {
+	      select(this).node().blur();
 	    }
+	  }
 
+	  function moveFocusToLast() {
+	    var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();
 
-	    function drawImages(selection) {
-	        var enabled = svgMapillaryImages.enabled;
-	        var service = getService();
-
-	        layer = selection.selectAll('.layer-mapillary')
-	            .data(service ? [0] : []);
+	    if (nodes.length) {
+	      nodes[nodes.length - 1].focus();
+	    } else {
+	      select(this).node().blur();
+	    }
+	  }
+	}
 
-	        layer.exit()
-	            .remove();
+	function uiLoading(context) {
+	  var _modalSelection = select(null);
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapillary')
-	            .style('display', enabled ? 'block' : 'none');
+	  var _message = '';
+	  var _blocking = false;
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'sequences');
+	  var loading = function loading(selection) {
+	    _modalSelection = uiModal(selection, _blocking);
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'markers');
+	    var loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');
 
-	        layer = layerEnter
-	            .merge(layer);
+	    loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
+	    loadertext.append('h3').html(_message);
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadImages(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
-	    }
+	    _modalSelection.select('button.close').attr('class', 'hide');
 
+	    return loading;
+	  };
 
-	    drawImages.enabled = function(_) {
-	        if (!arguments.length) { return svgMapillaryImages.enabled; }
-	        svgMapillaryImages.enabled = _;
-	        if (svgMapillaryImages.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
+	  loading.message = function (val) {
+	    if (!arguments.length) return _message;
+	    _message = val;
+	    return loading;
+	  };
 
+	  loading.blocking = function (val) {
+	    if (!arguments.length) return _blocking;
+	    _blocking = val;
+	    return loading;
+	  };
 
-	    drawImages.supported = function() {
-	        return !!getService();
-	    };
+	  loading.close = function () {
+	    _modalSelection.remove();
+	  };
 
+	  loading.isShown = function () {
+	    return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
+	  };
 
-	    init();
-	    return drawImages;
+	  return loading;
 	}
 
-	function svgMapillarySigns(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var layer = select(null);
-	    var _mapillary;
+	function coreHistory(context) {
+	  var dispatch$1 = dispatch('reset', 'change', 'merge', 'restore', 'undone', 'redone');
 
+	  var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage
 
-	    function init() {
-	        if (svgMapillarySigns.initialized) { return; }  // run once
-	        svgMapillarySigns.enabled = false;
-	        svgMapillarySigns.initialized = true;
-	    }
 
+	  var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));
 
-	    function getService() {
-	        if (services.mapillary && !_mapillary) {
-	            _mapillary = services.mapillary;
-	            _mapillary.event.on('loadedSigns', throttledRedraw);
-	        } else if (!services.mapillary && _mapillary) {
-	            _mapillary = null;
-	        }
-	        return _mapillary;
-	    }
+	  var duration = 150;
+	  var _imageryUsed = [];
+	  var _photoOverlaysUsed = [];
+	  var _checkpoints = {};
 
+	  var _pausedGraph;
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	  var _stack;
 
-	        editOn();
-	    }
+	  var _index;
 
+	  var _tree; // internal _act, accepts list of actions and eased time
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
-	        editOff();
-	    }
 
+	  function _act(actions, t) {
+	    actions = Array.prototype.slice.call(actions);
+	    var annotation;
 
-	    function editOn() {
-	        layer.style('display', 'block');
+	    if (typeof actions[actions.length - 1] !== 'function') {
+	      annotation = actions.pop();
 	    }
 
+	    var graph = _stack[_index].graph;
 
-	    function editOff() {
-	        layer.selectAll('.icon-sign').remove();
-	        layer.style('display', 'none');
+	    for (var i = 0; i < actions.length; i++) {
+	      graph = actions[i](graph, t);
 	    }
 
+	    return {
+	      graph: graph,
+	      annotation: annotation,
+	      imageryUsed: _imageryUsed,
+	      photoOverlaysUsed: _photoOverlaysUsed,
+	      transform: context.projection.transform(),
+	      selectedIDs: context.selectedIDs()
+	    };
+	  } // internal _perform with eased time
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
 
-	        context.map().centerEase(d.loc);
+	  function _perform(args, t) {
+	    var previous = _stack[_index].graph;
+	    _stack = _stack.slice(0, _index + 1);
 
-	        var selectedImageKey = service.getSelectedImageKey();
-	        var imageKey;
+	    var actionResult = _act(args, t);
 
-	        // Pick one of the images the sign was detected in,
-	        // preference given to an image already selected.
-	        d.detections.forEach(function(detection) {
-	            if (!imageKey || selectedImageKey === detection.image_key) {
-	                imageKey = detection.image_key;
-	            }
-	        });
+	    _stack.push(actionResult);
 
-	        service
-	            .selectImage(context, imageKey)
-	            .updateViewer(context, imageKey)
-	            .showViewer(context);
-	    }
+	    _index++;
+	    return change(previous);
+	  } // internal _replace with eased time
 
 
-	    function update() {
-	        var service = getService();
-	        var data = (service ? service.signs(projection) : []);
-	        var selectedImageKey = service.getSelectedImageKey();
-	        var transform = svgPointTransform(projection);
-
-	        var signs = layer.selectAll('.icon-sign')
-	            .data(data, function(d) { return d.key; });
-
-	        // exit
-	        signs.exit()
-	            .remove();
-
-	        // enter
-	        var enter = signs.enter()
-	            .append('g')
-	            .attr('class', 'icon-sign icon-detected')
-	            .on('click', click);
-
-	        enter
-	            .append('use')
-	            .attr('width', '24px')
-	            .attr('height', '24px')
-	            .attr('x', '-12px')
-	            .attr('y', '-12px')
-	            .attr('xlink:href', function(d) { return '#' + d.value; });
-
-	        enter
-	            .append('rect')
-	            .attr('width', '24px')
-	            .attr('height', '24px')
-	            .attr('x', '-12px')
-	            .attr('y', '-12px');
-
-	        // update
-	        signs
-	            .merge(enter)
-	            .attr('transform', transform)
-	            .classed('currentView', function(d) {
-	                return d.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	            })
-	            .sort(function(a, b) {
-	                var aSelected = a.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	                var bSelected = b.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	                if (aSelected === bSelected) {
-	                    return b.loc[1] - a.loc[1]; // sort Y
-	                } else if (aSelected) {
-	                    return 1;
-	                }
-	                return -1;
-	            });
-	    }
+	  function _replace(args, t) {
+	    var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)
 
+	    var actionResult = _act(args, t);
 
-	    function drawSigns(selection) {
-	        var enabled = svgMapillarySigns.enabled;
-	        var service = getService();
+	    _stack[_index] = actionResult;
+	    return change(previous);
+	  } // internal _overwrite with eased time
 
-	        layer = selection.selectAll('.layer-mapillary-signs')
-	            .data(service ? [0] : []);
 
-	        layer.exit()
-	            .remove();
+	  function _overwrite(args, t) {
+	    var previous = _stack[_index].graph;
 
-	        layer = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapillary-signs layer-mapillary-detections')
-	            .style('display', enabled ? 'block' : 'none')
-	            .merge(layer);
+	    if (_index > 0) {
+	      _index--;
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadSigns(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	      _stack.pop();
 	    }
 
+	    _stack = _stack.slice(0, _index + 1);
 
-	    drawSigns.enabled = function(_) {
-	        if (!arguments.length) { return svgMapillarySigns.enabled; }
-	        svgMapillarySigns.enabled = _;
-	        if (svgMapillarySigns.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
+	    var actionResult = _act(args, t);
 
+	    _stack.push(actionResult);
 
-	    drawSigns.supported = function() {
-	        return !!getService();
-	    };
+	    _index++;
+	    return change(previous);
+	  } // determine difference and dispatch a change event
 
 
-	    init();
-	    return drawSigns;
-	}
+	  function change(previous) {
+	    var difference = coreDifference(previous, history.graph());
 
-	function svgMapillaryMapFeatures(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var layer = select(null);
-	    var _mapillary;
+	    if (!_pausedGraph) {
+	      dispatch$1.call('change', this, difference);
+	    }
 
+	    return difference;
+	  } // iD uses namespaced keys so multiple installations do not conflict
 
-	    function init() {
-	        if (svgMapillaryMapFeatures.initialized) { return; }  // run once
-	        svgMapillaryMapFeatures.enabled = false;
-	        svgMapillaryMapFeatures.initialized = true;
-	    }
 
+	  function getKey(n) {
+	    return 'iD_' + window.location.origin + '_' + n;
+	  }
 
-	    function getService() {
-	        if (services.mapillary && !_mapillary) {
-	            _mapillary = services.mapillary;
-	            _mapillary.event.on('loadedMapFeatures', throttledRedraw);
-	        } else if (!services.mapillary && _mapillary) {
-	            _mapillary = null;
-	        }
-	        return _mapillary;
-	    }
+	  var history = {
+	    graph: function graph() {
+	      return _stack[_index].graph;
+	    },
+	    tree: function tree() {
+	      return _tree;
+	    },
+	    base: function base() {
+	      return _stack[0].graph;
+	    },
+	    merge: function merge(entities
+	    /*, extent*/
+	    ) {
+	      var stack = _stack.map(function (state) {
+	        return state.graph;
+	      });
 
+	      _stack[0].graph.rebase(entities, stack, false);
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	      _tree.rebase(entities, false);
 
-	        editOn();
-	    }
+	      dispatch$1.call('merge', this, entities);
+	    },
+	    perform: function perform() {
+	      // complete any transition already in progress
+	      select(document).interrupt('history.perform');
+	      var transitionable = false;
+	      var action0 = arguments[0];
 
+	      if (arguments.length === 1 || arguments.length === 2 && typeof arguments[1] !== 'function') {
+	        transitionable = !!action0.transitionable;
+	      }
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
-	        editOff();
-	    }
+	      if (transitionable) {
+	        var origArguments = arguments;
+	        select(document).transition('history.perform').duration(duration).ease(linear$1).tween('history.tween', function () {
+	          return function (t) {
+	            if (t < 1) _overwrite([action0], t);
+	          };
+	        }).on('start', function () {
+	          _perform([action0], 0);
+	        }).on('end interrupt', function () {
+	          _overwrite(origArguments, 1);
+	        });
+	      } else {
+	        return _perform(arguments);
+	      }
+	    },
+	    replace: function replace() {
+	      select(document).interrupt('history.perform');
+	      return _replace(arguments, 1);
+	    },
+	    // Same as calling pop and then perform
+	    overwrite: function overwrite() {
+	      select(document).interrupt('history.perform');
+	      return _overwrite(arguments, 1);
+	    },
+	    pop: function pop(n) {
+	      select(document).interrupt('history.perform');
+	      var previous = _stack[_index].graph;
 
+	      if (isNaN(+n) || +n < 0) {
+	        n = 1;
+	      }
 
-	    function editOn() {
-	        layer.style('display', 'block');
-	    }
+	      while (n-- > 0 && _index > 0) {
+	        _index--;
 
+	        _stack.pop();
+	      }
 
-	    function editOff() {
-	        layer.selectAll('.icon-map-feature').remove();
-	        layer.style('display', 'none');
-	    }
+	      return change(previous);
+	    },
+	    // Back to the previous annotated state or _index = 0.
+	    undo: function undo() {
+	      select(document).interrupt('history.perform');
+	      var previousStack = _stack[_index];
+	      var previous = previousStack.graph;
 
+	      while (_index > 0) {
+	        _index--;
+	        if (_stack[_index].annotation) break;
+	      }
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	      dispatch$1.call('undone', this, _stack[_index], previousStack);
+	      return change(previous);
+	    },
+	    // Forward to the next annotated state.
+	    redo: function redo() {
+	      select(document).interrupt('history.perform');
+	      var previousStack = _stack[_index];
+	      var previous = previousStack.graph;
+	      var tryIndex = _index;
 
-	        context.map().centerEase(d.loc);
+	      while (tryIndex < _stack.length - 1) {
+	        tryIndex++;
 
-	        var selectedImageKey = service.getSelectedImageKey();
-	        var imageKey;
+	        if (_stack[tryIndex].annotation) {
+	          _index = tryIndex;
+	          dispatch$1.call('redone', this, _stack[_index], previousStack);
+	          break;
+	        }
+	      }
 
-	        // Pick one of the images the map feature was detected in,
-	        // preference given to an image already selected.
-	        d.detections.forEach(function(detection) {
-	            if (!imageKey || selectedImageKey === detection.image_key) {
-	                imageKey = detection.image_key;
-	            }
-	        });
+	      return change(previous);
+	    },
+	    pauseChangeDispatch: function pauseChangeDispatch() {
+	      if (!_pausedGraph) {
+	        _pausedGraph = _stack[_index].graph;
+	      }
+	    },
+	    resumeChangeDispatch: function resumeChangeDispatch() {
+	      if (_pausedGraph) {
+	        var previous = _pausedGraph;
+	        _pausedGraph = null;
+	        return change(previous);
+	      }
+	    },
+	    undoAnnotation: function undoAnnotation() {
+	      var i = _index;
 
-	        service
-	            .selectImage(context, imageKey)
-	            .updateViewer(context, imageKey)
-	            .showViewer(context);
-	    }
+	      while (i >= 0) {
+	        if (_stack[i].annotation) return _stack[i].annotation;
+	        i--;
+	      }
+	    },
+	    redoAnnotation: function redoAnnotation() {
+	      var i = _index + 1;
 
+	      while (i <= _stack.length - 1) {
+	        if (_stack[i].annotation) return _stack[i].annotation;
+	        i++;
+	      }
+	    },
+	    // Returns the entities from the active graph with bounding boxes
+	    // overlapping the given `extent`.
+	    intersects: function intersects(extent) {
+	      return _tree.intersects(extent, _stack[_index].graph);
+	    },
+	    difference: function difference() {
+	      var base = _stack[0].graph;
+	      var head = _stack[_index].graph;
+	      return coreDifference(base, head);
+	    },
+	    changes: function changes(action) {
+	      var base = _stack[0].graph;
+	      var head = _stack[_index].graph;
 
-	    function update() {
-	        var service = getService();
-	        var data = (service ? service.mapFeatures(projection) : []);
-	        var selectedImageKey = service && service.getSelectedImageKey();
-	        var transform = svgPointTransform(projection);
-
-	        var mapFeatures = layer.selectAll('.icon-map-feature')
-	            .data(data, function(d) { return d.key; });
-
-	        // exit
-	        mapFeatures.exit()
-	            .remove();
-
-	        // enter
-	        var enter = mapFeatures.enter()
-	            .append('g')
-	            .attr('class', 'icon-map-feature icon-detected')
-	            .on('click', click);
-
-	        enter
-	            .append('title')
-	            .text(function(d) {
-	                var id = d.value.replace(/--/g, '.').replace(/-/g, '_');
-	                return _t('mapillary_map_features.' + id);
-	            });
+	      if (action) {
+	        head = action(head);
+	      }
 
-	        enter
-	            .append('use')
-	            .attr('width', '24px')
-	            .attr('height', '24px')
-	            .attr('x', '-12px')
-	            .attr('y', '-12px')
-	            .attr('xlink:href', function(d) {
-	                if (d.value === 'object--billboard') {
-	                    // no billboard icon right now, so use the advertisement icon
-	                    return '#object--sign--advertisement';
-	                }
-	                return '#' + d.value;
-	            });
+	      var difference = coreDifference(base, head);
+	      return {
+	        modified: difference.modified(),
+	        created: difference.created(),
+	        deleted: difference.deleted()
+	      };
+	    },
+	    hasChanges: function hasChanges() {
+	      return this.difference().length() > 0;
+	    },
+	    imageryUsed: function imageryUsed(sources) {
+	      if (sources) {
+	        _imageryUsed = sources;
+	        return history;
+	      } else {
+	        var s = new Set();
 
-	        enter
-	            .append('rect')
-	            .attr('width', '24px')
-	            .attr('height', '24px')
-	            .attr('x', '-12px')
-	            .attr('y', '-12px');
-
-	        // update
-	        mapFeatures
-	            .merge(enter)
-	            .attr('transform', transform)
-	            .classed('currentView', function(d) {
-	                return d.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	            })
-	            .sort(function(a, b) {
-	                var aSelected = a.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	                var bSelected = b.detections.some(function(detection) {
-	                    return detection.image_key === selectedImageKey;
-	                });
-	                if (aSelected === bSelected) {
-	                    return b.loc[1] - a.loc[1]; // sort Y
-	                } else if (aSelected) {
-	                    return 1;
-	                }
-	                return -1;
+	        _stack.slice(1, _index + 1).forEach(function (state) {
+	          state.imageryUsed.forEach(function (source) {
+	            if (source !== 'Custom') {
+	              s.add(source);
+	            }
+	          });
+	        });
+
+	        return Array.from(s);
+	      }
+	    },
+	    photoOverlaysUsed: function photoOverlaysUsed(sources) {
+	      if (sources) {
+	        _photoOverlaysUsed = sources;
+	        return history;
+	      } else {
+	        var s = new Set();
+
+	        _stack.slice(1, _index + 1).forEach(function (state) {
+	          if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
+	            state.photoOverlaysUsed.forEach(function (photoOverlay) {
+	              s.add(photoOverlay);
 	            });
-	    }
+	          }
+	        });
 
+	        return Array.from(s);
+	      }
+	    },
+	    // save the current history state
+	    checkpoint: function checkpoint(key) {
+	      _checkpoints[key] = {
+	        stack: _stack,
+	        index: _index
+	      };
+	      return history;
+	    },
+	    // restore history state to a given checkpoint or reset completely
+	    reset: function reset(key) {
+	      if (key !== undefined && _checkpoints.hasOwnProperty(key)) {
+	        _stack = _checkpoints[key].stack;
+	        _index = _checkpoints[key].index;
+	      } else {
+	        _stack = [{
+	          graph: coreGraph()
+	        }];
+	        _index = 0;
+	        _tree = coreTree(_stack[0].graph);
+	        _checkpoints = {};
+	      }
 
-	    function drawMapFeatures(selection) {
-	        var enabled = svgMapillaryMapFeatures.enabled;
-	        var service = getService();
+	      dispatch$1.call('reset');
+	      dispatch$1.call('change');
+	      return history;
+	    },
+	    // `toIntroGraph()` is used to export the intro graph used by the walkthrough.
+	    //
+	    // To use it:
+	    //  1. Start the walkthrough.
+	    //  2. Get to a "free editing" tutorial step
+	    //  3. Make your edits to the walkthrough map
+	    //  4. In your browser dev console run:
+	    //        `id.history().toIntroGraph()`
+	    //  5. This outputs stringified JSON to the browser console
+	    //  6. Copy it to `data/intro_graph.json` and prettify it in your code editor
+	    toIntroGraph: function toIntroGraph() {
+	      var nextID = {
+	        n: 0,
+	        r: 0,
+	        w: 0
+	      };
+	      var permIDs = {};
+	      var graph = this.graph();
+	      var baseEntities = {}; // clone base entities..
 
-	        layer = selection.selectAll('.layer-mapillary-map-features')
-	            .data(service ? [0] : []);
+	      Object.values(graph.base().entities).forEach(function (entity) {
+	        var copy = copyIntroEntity(entity);
+	        baseEntities[copy.id] = copy;
+	      }); // replace base entities with head entities..
 
-	        layer.exit()
-	            .remove();
+	      Object.keys(graph.entities).forEach(function (id) {
+	        var entity = graph.entities[id];
 
-	        layer = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapillary-map-features layer-mapillary-detections')
-	            .style('display', enabled ? 'block' : 'none')
-	            .merge(layer);
+	        if (entity) {
+	          var copy = copyIntroEntity(entity);
+	          baseEntities[copy.id] = copy;
+	        } else {
+	          delete baseEntities[id];
+	        }
+	      }); // swap temporary for permanent ids..
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadMapFeatures(projection);
-	            } else {
-	                editOff();
-	            }
+	      Object.values(baseEntities).forEach(function (entity) {
+	        if (Array.isArray(entity.nodes)) {
+	          entity.nodes = entity.nodes.map(function (node) {
+	            return permIDs[node] || node;
+	          });
 	        }
-	    }
 
+	        if (Array.isArray(entity.members)) {
+	          entity.members = entity.members.map(function (member) {
+	            member.id = permIDs[member.id] || member.id;
+	            return member;
+	          });
+	        }
+	      });
+	      return JSON.stringify({
+	        dataIntroGraph: baseEntities
+	      });
 
-	    drawMapFeatures.enabled = function(_) {
-	        if (!arguments.length) { return svgMapillaryMapFeatures.enabled; }
-	        svgMapillaryMapFeatures.enabled = _;
-	        if (svgMapillaryMapFeatures.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
+	      function copyIntroEntity(source) {
+	        var copy = utilObjectOmit(source, ['type', 'user', 'v', 'version', 'visible']); // Note: the copy is no longer an osmEntity, so it might not have `tags`
+
+	        if (copy.tags && !Object.keys(copy.tags)) {
+	          delete copy.tags;
 	        }
-	        dispatch.call('change');
-	        return this;
-	    };
 
+	        if (Array.isArray(copy.loc)) {
+	          copy.loc[0] = +copy.loc[0].toFixed(6);
+	          copy.loc[1] = +copy.loc[1].toFixed(6);
+	        }
 
-	    drawMapFeatures.supported = function() {
-	        return !!getService();
-	    };
+	        var match = source.id.match(/([nrw])-\d*/); // temporary id
 
+	        if (match !== null) {
+	          var nrw = match[1];
+	          var permID;
 
-	    init();
-	    return drawMapFeatures;
-	}
+	          do {
+	            permID = nrw + ++nextID[nrw];
+	          } while (baseEntities.hasOwnProperty(permID));
 
-	function svgOpenstreetcamImages(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var minMarkerZoom = 16;
-	    var minViewfieldZoom = 18;
-	    var layer = select(null);
-	    var _openstreetcam;
+	          copy.id = permIDs[source.id] = permID;
+	        }
 
+	        return copy;
+	      }
+	    },
+	    toJSON: function toJSON() {
+	      if (!this.hasChanges()) return;
+	      var allEntities = {};
+	      var baseEntities = {};
+	      var base = _stack[0];
+
+	      var s = _stack.map(function (i) {
+	        var modified = [];
+	        var deleted = [];
+	        Object.keys(i.graph.entities).forEach(function (id) {
+	          var entity = i.graph.entities[id];
+
+	          if (entity) {
+	            var key = osmEntity.key(entity);
+	            allEntities[key] = entity;
+	            modified.push(key);
+	          } else {
+	            deleted.push(id);
+	          } // make sure that the originals of changed or deleted entities get merged
+	          // into the base of the _stack after restoring the data from JSON.
 
-	    function init() {
-	        if (svgOpenstreetcamImages.initialized) { return; }  // run once
-	        svgOpenstreetcamImages.enabled = false;
-	        svgOpenstreetcamImages.initialized = true;
-	    }
 
+	          if (id in base.graph.entities) {
+	            baseEntities[id] = base.graph.entities[id];
+	          }
 
-	    function getService() {
-	        if (services.openstreetcam && !_openstreetcam) {
-	            _openstreetcam = services.openstreetcam;
-	            _openstreetcam.event.on('loadedImages', throttledRedraw);
-	        } else if (!services.openstreetcam && _openstreetcam) {
-	            _openstreetcam = null;
-	        }
+	          if (entity && entity.nodes) {
+	            // get originals of pre-existing child nodes
+	            entity.nodes.forEach(function (nodeID) {
+	              if (nodeID in base.graph.entities) {
+	                baseEntities[nodeID] = base.graph.entities[nodeID];
+	              }
+	            });
+	          } // get originals of parent entities too
 
-	        return _openstreetcam;
-	    }
 
+	          var baseParents = base.graph._parentWays[id];
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	          if (baseParents) {
+	            baseParents.forEach(function (parentID) {
+	              if (parentID in base.graph.entities) {
+	                baseEntities[parentID] = base.graph.entities[parentID];
+	              }
+	            });
+	          }
+	        });
+	        var x = {};
+	        if (modified.length) x.modified = modified;
+	        if (deleted.length) x.deleted = deleted;
+	        if (i.imageryUsed) x.imageryUsed = i.imageryUsed;
+	        if (i.photoOverlaysUsed) x.photoOverlaysUsed = i.photoOverlaysUsed;
+	        if (i.annotation) x.annotation = i.annotation;
+	        if (i.transform) x.transform = i.transform;
+	        if (i.selectedIDs) x.selectedIDs = i.selectedIDs;
+	        return x;
+	      });
 
-	        editOn();
+	      return JSON.stringify({
+	        version: 3,
+	        entities: Object.values(allEntities),
+	        baseEntities: Object.values(baseEntities),
+	        stack: s,
+	        nextIDs: osmEntity.id.next,
+	        index: _index,
+	        // note the time the changes were saved
+	        timestamp: new Date().getTime()
+	      });
+	    },
+	    fromJSON: function fromJSON(json, loadChildNodes) {
+	      var h = JSON.parse(json);
+	      var loadComplete = true;
+	      osmEntity.id.next = h.nextIDs;
+	      _index = h.index;
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
-	    }
+	      if (h.version === 2 || h.version === 3) {
+	        var allEntities = {};
+	        h.entities.forEach(function (entity) {
+	          allEntities[osmEntity.key(entity)] = osmEntity(entity);
+	        });
 
+	        if (h.version === 3) {
+	          // This merges originals for changed entities into the base of
+	          // the _stack even if the current _stack doesn't have them (for
+	          // example when iD has been restarted in a different region)
+	          var baseEntities = h.baseEntities.map(function (d) {
+	            return osmEntity(d);
+	          });
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	          var stack = _stack.map(function (state) {
+	            return state.graph;
+	          });
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', editOff);
-	    }
+	          _stack[0].graph.rebase(baseEntities, stack, true);
 
+	          _tree.rebase(baseEntities, true); // When we restore a modified way, we also need to fetch any missing
+	          // childnodes that would normally have been downloaded with it.. #2142
 
-	    function editOn() {
-	        layer.style('display', 'block');
-	    }
 
+	          if (loadChildNodes) {
+	            var osm = context.connection();
+	            var baseWays = baseEntities.filter(function (e) {
+	              return e.type === 'way';
+	            });
+	            var nodeIDs = baseWays.reduce(function (acc, way) {
+	              return utilArrayUnion(acc, way.nodes);
+	            }, []);
+	            var missing = nodeIDs.filter(function (n) {
+	              return !_stack[0].graph.hasEntity(n);
+	            });
 
-	    function editOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
-	    }
+	            if (missing.length && osm) {
+	              loadComplete = false;
+	              context.map().redrawEnable(false);
+	              var loading = uiLoading(context).blocking(true);
+	              context.container().call(loading);
 
+	              var childNodesLoaded = function childNodesLoaded(err, result) {
+	                if (!err) {
+	                  var visibleGroups = utilArrayGroupBy(result.data, 'visible');
+	                  var visibles = visibleGroups["true"] || []; // alive nodes
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	                  var invisibles = visibleGroups["false"] || []; // deleted nodes
 
-	        service
-	            .selectImage(context, d)
-	            .updateViewer(context, d)
-	            .showViewer(context);
+	                  if (visibles.length) {
+	                    var visibleIDs = visibles.map(function (entity) {
+	                      return entity.id;
+	                    });
 
-	        context.map().centerEase(d.loc);
-	    }
+	                    var stack = _stack.map(function (state) {
+	                      return state.graph;
+	                    });
 
+	                    missing = utilArrayDifference(missing, visibleIDs);
 
-	    function mouseover(d) {
-	        var service = getService();
-	        if (service) { service.setStyles(context, d); }
-	    }
+	                    _stack[0].graph.rebase(visibles, stack, true);
 
+	                    _tree.rebase(visibles, true);
+	                  } // fetch older versions of nodes that were deleted..
 
-	    function mouseout() {
-	        var service = getService();
-	        if (service) { service.setStyles(context, null); }
-	    }
 
+	                  invisibles.forEach(function (entity) {
+	                    osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
+	                  });
+	                }
 
-	    function transform(d) {
-	        var t = svgPointTransform(projection)(d);
-	        if (d.ca) {
-	            t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
-	        }
-	        return t;
-	    }
+	                if (err || !missing.length) {
+	                  loading.close();
+	                  context.map().redrawEnable(true);
+	                  dispatch$1.call('change');
+	                  dispatch$1.call('restore', this);
+	                }
+	              };
 
+	              osm.loadMultiple(missing, childNodesLoaded);
+	            }
+	          }
+	        }
 
-	    context.photos().on('change.openstreetcam_images', update);
+	        _stack = h.stack.map(function (d) {
+	          var entities = {},
+	              entity;
 
-	    function update() {
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
+	          if (d.modified) {
+	            d.modified.forEach(function (key) {
+	              entity = allEntities[key];
+	              entities[entity.id] = entity;
+	            });
+	          }
 
-	        var z = ~~context.map().zoom();
-	        var showMarkers = (z >= minMarkerZoom);
-	        var showViewfields = (z >= minViewfieldZoom);
+	          if (d.deleted) {
+	            d.deleted.forEach(function (id) {
+	              entities[id] = undefined;
+	            });
+	          }
 
-	        var service = getService();
-	        var sequences = [];
-	        var images = [];
+	          return {
+	            graph: coreGraph(_stack[0].graph).load(entities),
+	            annotation: d.annotation,
+	            imageryUsed: d.imageryUsed,
+	            photoOverlaysUsed: d.photoOverlaysUsed,
+	            transform: d.transform,
+	            selectedIDs: d.selectedIDs
+	          };
+	        });
+	      } else {
+	        // original version
+	        _stack = h.stack.map(function (d) {
+	          var entities = {};
 
-	        if (context.photos().showsFlat()) {
-	            sequences = (service ? service.sequences(projection) : []);
-	            images = (service && showMarkers ? service.images(projection) : []);
-	        }
+	          for (var i in d.entities) {
+	            var entity = d.entities[i];
+	            entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
+	          }
 
-	        var traces = layer.selectAll('.sequences').selectAll('.sequence')
-	            .data(sequences, function(d) { return d.properties.key; });
+	          d.graph = coreGraph(_stack[0].graph).load(entities);
+	          return d;
+	        });
+	      }
 
-	        // exit
-	        traces.exit()
-	            .remove();
+	      var transform = _stack[_index].transform;
 
-	        // enter/update
-	        traces = traces.enter()
-	            .append('path')
-	            .attr('class', 'sequence')
-	            .merge(traces)
-	            .attr('d', svgPath(projection).geojson);
+	      if (transform) {
+	        context.map().transformEase(transform, 0); // 0 = immediate, no easing
+	      }
 
+	      if (loadComplete) {
+	        dispatch$1.call('change');
+	        dispatch$1.call('restore', this);
+	      }
 
-	        var groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-	            .data(images, function(d) { return d.key; });
+	      return history;
+	    },
+	    lock: function lock() {
+	      return _lock.lock();
+	    },
+	    unlock: function unlock() {
+	      _lock.unlock();
+	    },
+	    save: function save() {
+	      if (_lock.locked() && // don't overwrite existing, unresolved changes
+	      !_hasUnresolvedRestorableChanges) {
+	        corePreferences(getKey('saved_history'), history.toJSON() || null);
+	      }
 
-	        // exit
-	        groups.exit()
-	            .remove();
+	      return history;
+	    },
+	    // delete the history version saved in localStorage
+	    clearSaved: function clearSaved() {
+	      context.debouncedSave.cancel();
 
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'viewfield-group')
-	            .on('mouseenter', mouseover)
-	            .on('mouseleave', mouseout)
-	            .on('click', click);
+	      if (_lock.locked()) {
+	        _hasUnresolvedRestorableChanges = false;
+	        corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history
 
-	        groupsEnter
-	            .append('g')
-	            .attr('class', 'viewfield-scale');
+	        corePreferences('comment', null);
+	        corePreferences('hashtags', null);
+	        corePreferences('source', null);
+	      }
 
-	        // update
-	        var markers = groups
-	            .merge(groupsEnter)
-	            .sort(function(a, b) {
-	                return (a === selected) ? 1
-	                    : (b === selected) ? -1
-	                    : b.loc[1] - a.loc[1];  // sort Y
-	            })
-	            .attr('transform', transform)
-	            .select('.viewfield-scale');
+	      return history;
+	    },
+	    savedHistoryJSON: function savedHistoryJSON() {
+	      return corePreferences(getKey('saved_history'));
+	    },
+	    hasRestorableChanges: function hasRestorableChanges() {
+	      return _hasUnresolvedRestorableChanges;
+	    },
+	    // load history from a version stored in localStorage
+	    restore: function restore() {
+	      if (_lock.locked()) {
+	        _hasUnresolvedRestorableChanges = false;
+	        var json = this.savedHistoryJSON();
+	        if (json) history.fromJSON(json, true);
+	      }
+	    },
+	    _getKey: getKey
+	  };
+	  history.reset();
+	  return utilRebind(history, dispatch$1, 'on');
+	}
 
+	/**
+	 * Look for roads that can be connected to other roads with a short extension
+	 */
 
-	        markers.selectAll('circle')
-	            .data([0])
-	            .enter()
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('r', '6');
+	function validationAlmostJunction(context) {
+	  var type = 'almost_junction';
+	  var EXTEND_TH_METERS = 5;
+	  var WELD_TH_METERS = 0.75; // Comes from considering bounding case of parallel ways
 
-	        var viewfields = markers.selectAll('.viewfield')
-	            .data(showViewfields ? [0] : []);
+	  var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
 
-	        viewfields.exit()
-	            .remove();
+	  var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
 
-	        viewfields.enter()               // viewfields may or may not be drawn...
-	            .insert('path', 'circle')    // but if they are, draw below the circles
-	            .attr('class', 'viewfield')
-	            .attr('transform', 'scale(1.5,1.5),translate(-8, -13)')
-	            .attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
-	    }
+	  function isHighway(entity) {
+	    return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
+	  }
 
+	  function isTaggedAsNotContinuing(node) {
+	    return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
+	  }
 
-	    function drawImages(selection) {
-	        var enabled = svgOpenstreetcamImages.enabled,
-	            service = getService();
+	  var validation = function checkAlmostJunction(entity, graph) {
+	    if (!isHighway(entity)) return [];
+	    if (entity.isDegenerate()) return [];
+	    var tree = context.history().tree();
+	    var extendableNodeInfos = findConnectableEndNodesByExtension(entity);
+	    var issues = [];
+	    extendableNodeInfos.forEach(function (extendableNodeInfo) {
+	      issues.push(new validationIssue({
+	        type: type,
+	        subtype: 'highway-highway',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity1 = context.hasEntity(this.entityIds[0]);
 
-	        layer = selection.selectAll('.layer-openstreetcam')
-	            .data(service ? [0] : []);
+	          if (this.entityIds[0] === this.entityIds[2]) {
+	            return entity1 ? _t.html('issues.almost_junction.self.message', {
+	              feature: utilDisplayLabel(entity1, context.graph())
+	            }) : '';
+	          } else {
+	            var entity2 = context.hasEntity(this.entityIds[2]);
+	            return entity1 && entity2 ? _t.html('issues.almost_junction.message', {
+	              feature: utilDisplayLabel(entity1, context.graph()),
+	              feature2: utilDisplayLabel(entity2, context.graph())
+	            }) : '';
+	          }
+	        },
+	        reference: showReference,
+	        entityIds: [entity.id, extendableNodeInfo.node.id, extendableNodeInfo.wid],
+	        loc: extendableNodeInfo.node.loc,
+	        hash: JSON.stringify(extendableNodeInfo.node.loc),
+	        data: {
+	          midId: extendableNodeInfo.mid.id,
+	          edge: extendableNodeInfo.edge,
+	          cross_loc: extendableNodeInfo.cross_loc
+	        },
+	        dynamicFixes: makeFixes
+	      }));
+	    });
+	    return issues;
 
-	        layer.exit()
-	            .remove();
+	    function makeFixes(context) {
+	      var fixes = [new validationIssueFix({
+	        icon: 'iD-icon-abutment',
+	        title: _t.html('issues.fix.connect_features.title'),
+	        onClick: function onClick(context) {
+	          var annotation = _t('issues.fix.connect_almost_junction.annotation');
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-openstreetcam')
-	            .style('display', enabled ? 'block' : 'none');
+	          var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
+	              endNodeId = _this$issue$entityIds[1],
+	              crossWayId = _this$issue$entityIds[2];
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'sequences');
+	          var midNode = context.entity(this.issue.data.midId);
+	          var endNode = context.entity(endNodeId);
+	          var crossWay = context.entity(crossWayId); // When endpoints are close, just join if resulting small change in angle (#7201)
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'markers');
+	          var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
 
-	        layer = layerEnter
-	            .merge(layer);
+	          if (nearEndNodes.length > 0) {
+	            var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadImages(projection);
-	            } else {
-	                editOff();
+	            if (collinear) {
+	              context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
+	              return;
 	            }
+	          }
+
+	          var targetEdge = this.issue.data.edge;
+	          var crossLoc = this.issue.data.cross_loc;
+	          var edgeNodes = [context.entity(targetEdge[0]), context.entity(targetEdge[1])];
+	          var closestNodeInfo = geoSphericalClosestNode(edgeNodes, crossLoc); // already a point nearby, just connect to that
+
+	          if (closestNodeInfo.distance < WELD_TH_METERS) {
+	            context.perform(actionMergeNodes([closestNodeInfo.node.id, endNode.id], closestNodeInfo.node.loc), annotation); // else add the end node to the edge way
+	          } else {
+	            context.perform(actionAddMidpoint({
+	              loc: crossLoc,
+	              edge: targetEdge
+	            }, endNode), annotation);
+	          }
 	        }
+	      })];
+	      var node = context.hasEntity(this.entityIds[1]);
+
+	      if (node && !node.hasInterestingTags()) {
+	        // node has no descriptive tags, suggest noexit fix
+	        fixes.push(new validationIssueFix({
+	          icon: 'maki-barrier',
+	          title: _t.html('issues.fix.tag_as_disconnected.title'),
+	          onClick: function onClick(context) {
+	            var nodeID = this.issue.entityIds[1];
+	            var tags = Object.assign({}, context.entity(nodeID).tags);
+	            tags.noexit = 'yes';
+	            context.perform(actionChangeTags(nodeID, tags), _t('issues.fix.tag_as_disconnected.annotation'));
+	          }
+	        }));
+	      }
+
+	      return fixes;
 	    }
 
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.almost_junction.highway-highway.reference'));
+	    }
 
-	    drawImages.enabled = function(_) {
-	        if (!arguments.length) { return svgOpenstreetcamImages.enabled; }
-	        svgOpenstreetcamImages.enabled = _;
-	        if (svgOpenstreetcamImages.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
+	    function isExtendableCandidate(node, way) {
+	      // can not accurately test vertices on tiles not downloaded from osm - #5938
+	      var osm = services.osm;
 
+	      if (osm && !osm.isDataLoaded(node.loc)) {
+	        return false;
+	      }
 
-	    drawImages.supported = function() {
-	        return !!getService();
-	    };
+	      if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
+	        return false;
+	      }
 
+	      var occurrences = 0;
 
-	    init();
-	    return drawImages;
-	}
+	      for (var index in way.nodes) {
+	        if (way.nodes[index] === node.id) {
+	          occurrences += 1;
 
-	function svgOsm(projection, context, dispatch) {
-	    var enabled = true;
+	          if (occurrences > 1) {
+	            return false;
+	          }
+	        }
+	      }
+
+	      return true;
+	    }
+
+	    function findConnectableEndNodesByExtension(way) {
+	      var results = [];
+	      if (way.isClosed()) return results;
+	      var testNodes;
+	      var indices = [0, way.nodes.length - 1];
+	      indices.forEach(function (nodeIndex) {
+	        var nodeID = way.nodes[nodeIndex];
+	        var node = graph.entity(nodeID);
+	        if (!isExtendableCandidate(node, way)) return;
+	        var connectionInfo = canConnectByExtend(way, nodeIndex);
+	        if (!connectionInfo) return;
+	        testNodes = graph.childNodes(way).slice(); // shallow copy
+
+	        testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection
+
+	        if (geoHasSelfIntersections(testNodes, nodeID)) return;
+	        results.push(connectionInfo);
+	      });
+	      return results;
+	    }
 
+	    function findNearbyEndNodes(node, way) {
+	      return [way.nodes[0], way.nodes[way.nodes.length - 1]].map(function (d) {
+	        return graph.entity(d);
+	      }).filter(function (d) {
+	        // Node cannot be near to itself, but other endnode of same way could be
+	        return d.id !== node.id && geoSphericalDistance(node.loc, d.loc) <= CLOSE_NODE_TH;
+	      });
+	    }
 
-	    function drawOsm(selection) {
-	        selection.selectAll('.layer-osm')
-	            .data(['covered', 'areas', 'lines', 'points', 'labels'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'layer-osm ' + d; });
+	    function findSmallJoinAngle(midNode, tipNode, endNodes) {
+	      // Both nodes could be close, so want to join whichever is closest to collinear
+	      var joinTo;
+	      var minAngle = Infinity; // Checks midNode -> tipNode -> endNode for collinearity
 
-	        selection.selectAll('.layer-osm.points').selectAll('.points-group')
-	            .data(['points', 'midpoints', 'vertices', 'turns'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'points-group ' + d; });
-	    }
+	      endNodes.forEach(function (endNode) {
+	        var a1 = geoAngle(midNode, tipNode, context.projection) + Math.PI;
+	        var a2 = geoAngle(midNode, endNode, context.projection) + Math.PI;
+	        var diff = Math.max(a1, a2) - Math.min(a1, a2);
 
+	        if (diff < minAngle) {
+	          joinTo = endNode;
+	          minAngle = diff;
+	        }
+	      });
+	      /* Threshold set by considering right angle triangle
+	      based on node joining threshold and extension distance */
 
-	    function showLayer() {
-	        var layer = context.surface().selectAll('.data-layer.osm');
-	        layer.interrupt();
+	      if (minAngle <= SIG_ANGLE_TH) return joinTo;
+	      return null;
+	    }
 
-	        layer
-	            .classed('disabled', false)
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end interrupt', function () {
-	                dispatch.call('change');
-	            });
+	    function hasTag(tags, key) {
+	      return tags[key] !== undefined && tags[key] !== 'no';
 	    }
 
+	    function canConnectWays(way, way2) {
+	      // allow self-connections
+	      if (way.id === way2.id) return true; // if one is bridge or tunnel, both must be bridge or tunnel
 
-	    function hideLayer() {
-	        var layer = context.surface().selectAll('.data-layer.osm');
-	        layer.interrupt();
+	      if ((hasTag(way.tags, 'bridge') || hasTag(way2.tags, 'bridge')) && !(hasTag(way.tags, 'bridge') && hasTag(way2.tags, 'bridge'))) return false;
+	      if ((hasTag(way.tags, 'tunnel') || hasTag(way2.tags, 'tunnel')) && !(hasTag(way.tags, 'tunnel') && hasTag(way2.tags, 'tunnel'))) return false; // must have equivalent layers and levels
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end interrupt', function () {
-	                layer.classed('disabled', true);
-	                dispatch.call('change');
-	            });
+	      var layer1 = way.tags.layer || '0',
+	          layer2 = way2.tags.layer || '0';
+	      if (layer1 !== layer2) return false;
+	      var level1 = way.tags.level || '0',
+	          level2 = way2.tags.level || '0';
+	      if (level1 !== level2) return false;
+	      return true;
 	    }
 
+	    function canConnectByExtend(way, endNodeIdx) {
+	      var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point
 
-	    drawOsm.enabled = function(val) {
-	        if (!arguments.length) { return enabled; }
-	        enabled = val;
+	      var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge
 
-	        if (enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
+	      var tipNode = graph.entity(tipNid);
+	      var midNode = graph.entity(midNid);
+	      var lon = tipNode.loc[0];
+	      var lat = tipNode.loc[1];
+	      var lon_range = geoMetersToLon(EXTEND_TH_METERS, lat) / 2;
+	      var lat_range = geoMetersToLat(EXTEND_TH_METERS) / 2;
+	      var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]); // first, extend the edge of [midNode -> tipNode] by EXTEND_TH_METERS and find the "extended tip" location
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	      var edgeLen = geoSphericalDistance(midNode.loc, tipNode.loc);
+	      var t = EXTEND_TH_METERS / edgeLen + 1.0;
+	      var extTipLoc = geoVecInterp(midNode.loc, tipNode.loc, t); // then, check if the extension part [tipNode.loc -> extTipLoc] intersects any other ways
 
+	      var segmentInfos = tree.waySegments(queryExtent, graph);
 
-	    return drawOsm;
-	}
+	      for (var i = 0; i < segmentInfos.length; i++) {
+	        var segmentInfo = segmentInfos[i];
+	        var way2 = graph.entity(segmentInfo.wayId);
+	        if (!isHighway(way2)) continue;
+	        if (!canConnectWays(way, way2)) continue;
+	        var nAid = segmentInfo.nodes[0],
+	            nBid = segmentInfo.nodes[1];
+	        if (nAid === tipNid || nBid === tipNid) continue;
+	        var nA = graph.entity(nAid),
+	            nB = graph.entity(nBid);
+	        var crossLoc = geoLineIntersection([tipNode.loc, extTipLoc], [nA.loc, nB.loc]);
 
-	var _notesEnabled = false;
-	var _osmService;
+	        if (crossLoc) {
+	          return {
+	            mid: midNode,
+	            node: tipNode,
+	            wid: way2.id,
+	            edge: [nA.id, nB.id],
+	            cross_loc: crossLoc
+	          };
+	        }
+	      }
 
+	      return null;
+	    }
+	  };
 
-	function svgNotes(projection, context, dispatch$1) {
-	    if (!dispatch$1) { dispatch$1 = dispatch('change'); }
-	    var throttledRedraw = throttle(function () { dispatch$1.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var touchLayer = select(null);
-	    var drawLayer = select(null);
-	    var _notesVisible = false;
+	  validation.type = type;
+	  return validation;
+	}
 
+	function validationCloseNodes(context) {
+	  var type = 'close_nodes';
+	  var pointThresholdMeters = 0.2;
 
-	    function markerPath(selection, klass) {
-	        selection
-	            .attr('class', klass)
-	            .attr('transform', 'translate(-8, -22)')
-	            .attr('d', 'm17.5,0l-15,0c-1.37,0 -2.5,1.12 -2.5,2.5l0,11.25c0,1.37 1.12,2.5 2.5,2.5l3.75,0l0,3.28c0,0.38 0.43,0.6 0.75,0.37l4.87,-3.65l5.62,0c1.37,0 2.5,-1.12 2.5,-2.5l0,-11.25c0,-1.37 -1.12,-2.5 -2.5,-2.5z');
+	  var validation = function validation(entity, graph) {
+	    if (entity.type === 'node') {
+	      return getIssuesForNode(entity);
+	    } else if (entity.type === 'way') {
+	      return getIssuesForWay(entity);
 	    }
 
+	    return [];
 
-	    // Loosely-coupled osm service for fetching notes.
-	    function getService() {
-	        if (services.osm && !_osmService) {
-	            _osmService = services.osm;
-	            _osmService.on('loadedNotes', throttledRedraw);
-	        } else if (!services.osm && _osmService) {
-	            _osmService = null;
-	        }
+	    function getIssuesForNode(node) {
+	      var parentWays = graph.parentWays(node);
 
-	        return _osmService;
+	      if (parentWays.length) {
+	        return getIssuesForVertex(node, parentWays);
+	      } else {
+	        return getIssuesForDetachedPoint(node);
+	      }
 	    }
 
+	    function wayTypeFor(way) {
+	      if (way.tags.boundary && way.tags.boundary !== 'no') return 'boundary';
+	      if (way.tags.indoor && way.tags.indoor !== 'no') return 'indoor';
+	      if (way.tags.building && way.tags.building !== 'no' || way.tags['building:part'] && way.tags['building:part'] !== 'no') return 'building';
+	      if (osmPathHighwayTagValues[way.tags.highway]) return 'path';
+	      var parentRelations = graph.parentRelations(way);
 
-	    // Show the notes
-	    function editOn() {
-	        if (!_notesVisible) {
-	            _notesVisible = true;
-	            drawLayer
-	                .style('display', 'block');
-	        }
-	    }
-
+	      for (var i in parentRelations) {
+	        var relation = parentRelations[i];
+	        if (relation.tags.type === 'boundary') return 'boundary';
 
-	    // Immediately remove the notes and their touch targets
-	    function editOff() {
-	        if (_notesVisible) {
-	            _notesVisible = false;
-	            drawLayer
-	                .style('display', 'none');
-	            drawLayer.selectAll('.note')
-	                .remove();
-	            touchLayer.selectAll('.note')
-	                .remove();
+	        if (relation.isMultipolygon()) {
+	          if (relation.tags.indoor && relation.tags.indoor !== 'no') return 'indoor';
+	          if (relation.tags.building && relation.tags.building !== 'no' || relation.tags['building:part'] && relation.tags['building:part'] !== 'no') return 'building';
 	        }
-	    }
+	      }
 
+	      return 'other';
+	    }
 
-	    // Enable the layer.  This shows the notes and transitions them to visible.
-	    function layerOn() {
-	        editOn();
+	    function shouldCheckWay(way) {
+	      // don't flag issues where merging would create degenerate ways
+	      if (way.nodes.length <= 2 || way.isClosed() && way.nodes.length <= 4) return false;
+	      var bbox = way.extent(graph).bbox();
+	      var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]); // don't flag close nodes in very small ways
 
-	        drawLayer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end interrupt', function () {
-	                dispatch$1.call('change');
-	            });
+	      if (hypotenuseMeters < 1.5) return false;
+	      return true;
 	    }
 
+	    function getIssuesForWay(way) {
+	      if (!shouldCheckWay(way)) return [];
+	      var issues = [],
+	          nodes = graph.childNodes(way);
 
-	    // Disable the layer.  This transitions the layer invisible and then hides the notes.
-	    function layerOff() {
-	        throttledRedraw.cancel();
-	        drawLayer.interrupt();
-	        touchLayer.selectAll('.note')
-	            .remove();
+	      for (var i = 0; i < nodes.length - 1; i++) {
+	        var node1 = nodes[i];
+	        var node2 = nodes[i + 1];
+	        var issue = getWayIssueIfAny(node1, node2, way);
+	        if (issue) issues.push(issue);
+	      }
 
-	        drawLayer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end interrupt', function () {
-	                editOff();
-	                dispatch$1.call('change');
-	            });
+	      return issues;
 	    }
 
+	    function getIssuesForVertex(node, parentWays) {
+	      var issues = [];
 
-	    // Update the note markers
-	    function updateMarkers() {
-	        if (!_notesVisible || !_notesEnabled) { return; }
-
-	        var service = getService();
-	        var selectedID = context.selectedNoteID();
-	        var data = (service ? service.notes(projection) : []);
-	        var getTransform = svgPointTransform(projection);
-
-	        // Draw markers..
-	        var notes = drawLayer.selectAll('.note')
-	            .data(data, function(d) { return d.status + d.id; });
-
-	        // exit
-	        notes.exit()
-	            .remove();
-
-	        // enter
-	        var notesEnter = notes.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'note note-' + d.id + ' ' + d.status; })
-	            .classed('new', function(d) { return d.id < 0; });
-
-	        notesEnter
-	            .append('ellipse')
-	            .attr('cx', 0.5)
-	            .attr('cy', 1)
-	            .attr('rx', 6.5)
-	            .attr('ry', 3)
-	            .attr('class', 'stroke');
-
-	        notesEnter
-	            .append('path')
-	            .call(markerPath, 'shadow');
-
-	        notesEnter
-	            .append('use')
-	            .attr('class', 'note-fill')
-	            .attr('width', '20px')
-	            .attr('height', '20px')
-	            .attr('x', '-8px')
-	            .attr('y', '-22px')
-	            .attr('xlink:href', '#iD-icon-note');
-
-	        notesEnter.selectAll('.icon-annotation')
-	            .data(function(d) { return [d]; })
-	            .enter()
-	            .append('use')
-	            .attr('class', 'icon-annotation')
-	            .attr('width', '10px')
-	            .attr('height', '10px')
-	            .attr('x', '-3px')
-	            .attr('y', '-19px')
-	            .attr('xlink:href', function(d) {
-	                return '#iD-icon-' + (d.id < 0 ? 'plus' : (d.status === 'open' ? 'close' : 'apply'));
-	            });
-
-	        // update
-	        notes
-	            .merge(notesEnter)
-	            .sort(sortY)
-	            .classed('selected', function(d) {
-	                var mode = context.mode();
-	                var isMoving = mode && mode.id === 'drag-note';  // no shadows when dragging
-	                return !isMoving && d.id === selectedID;
-	            })
-	            .attr('transform', getTransform);
+	      function checkForCloseness(node1, node2, way) {
+	        var issue = getWayIssueIfAny(node1, node2, way);
+	        if (issue) issues.push(issue);
+	      }
 
+	      for (var i = 0; i < parentWays.length; i++) {
+	        var parentWay = parentWays[i];
+	        if (!shouldCheckWay(parentWay)) continue;
+	        var lastIndex = parentWay.nodes.length - 1;
 
-	        // Draw targets..
-	        if (touchLayer.empty()) { return; }
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	        for (var j = 0; j < parentWay.nodes.length; j++) {
+	          if (j !== 0) {
+	            if (parentWay.nodes[j - 1] === node.id) {
+	              checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);
+	            }
+	          }
 
-	        var targets = touchLayer.selectAll('.note')
-	            .data(data, function(d) { return d.id; });
+	          if (j !== lastIndex) {
+	            if (parentWay.nodes[j + 1] === node.id) {
+	              checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
+	            }
+	          }
+	        }
+	      }
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	      return issues;
+	    }
 
-	        // enter/update
-	        targets.enter()
-	            .append('rect')
-	            .attr('width', '20px')
-	            .attr('height', '20px')
-	            .attr('x', '-8px')
-	            .attr('y', '-22px')
-	            .merge(targets)
-	            .sort(sortY)
-	            .attr('class', function(d) {
-	                var newClass = (d.id < 0 ? 'new' : '');
-	                return 'note target note-' + d.id + ' ' + fillClass + newClass;
-	            })
-	            .attr('transform', getTransform);
+	    function thresholdMetersForWay(way) {
+	      if (!shouldCheckWay(way)) return 0;
+	      var wayType = wayTypeFor(way); // don't flag boundaries since they might be highly detailed and can't be easily verified
 
+	      if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail
 
-	        function sortY(a, b) {
-	            return (a.id === selectedID) ? 1 : (b.id === selectedID) ? -1 : b.loc[1] - a.loc[1];
-	        }
+	      if (wayType === 'indoor') return 0.01;
+	      if (wayType === 'building') return 0.05;
+	      if (wayType === 'path') return 0.1;
+	      return 0.2;
 	    }
 
+	    function getIssuesForDetachedPoint(node) {
+	      var issues = [];
+	      var lon = node.loc[0];
+	      var lat = node.loc[1];
+	      var lon_range = geoMetersToLon(pointThresholdMeters, lat) / 2;
+	      var lat_range = geoMetersToLat(pointThresholdMeters) / 2;
+	      var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]);
+	      var intersected = context.history().tree().intersects(queryExtent, graph);
 
-	    // Draw the notes layer and schedule loading notes and updating markers.
-	    function drawNotes(selection) {
-	        var service = getService();
+	      for (var j = 0; j < intersected.length; j++) {
+	        var nearby = intersected[j];
+	        if (nearby.id === node.id) continue;
+	        if (nearby.type !== 'node' || nearby.geometry(graph) !== 'point') continue;
 
-	        var surface = context.surface();
-	        if (surface && !surface.empty()) {
-	            touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	        }
-
-	        drawLayer = selection.selectAll('.layer-notes')
-	            .data(service ? [0] : []);
-
-	        drawLayer.exit()
-	            .remove();
+	        if (nearby.loc === node.loc || geoSphericalDistance(node.loc, nearby.loc) < pointThresholdMeters) {
+	          // allow very close points if tags indicate the z-axis might vary
+	          var zAxisKeys = {
+	            layer: true,
+	            level: true,
+	            'addr:housenumber': true,
+	            'addr:unit': true
+	          };
+	          var zAxisDifferentiates = false;
 
-	        drawLayer = drawLayer.enter()
-	            .append('g')
-	            .attr('class', 'layer-notes')
-	            .style('display', _notesEnabled ? 'block' : 'none')
-	            .merge(drawLayer);
+	          for (var key in zAxisKeys) {
+	            var nodeValue = node.tags[key] || '0';
+	            var nearbyValue = nearby.tags[key] || '0';
 
-	        if (_notesEnabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                service.loadNotes(projection);
-	                updateMarkers();
-	            } else {
-	                editOff();
+	            if (nodeValue !== nearbyValue) {
+	              zAxisDifferentiates = true;
+	              break;
 	            }
-	        }
-	    }
-
-
-	    // Toggles the layer on and off
-	    drawNotes.enabled = function(val) {
-	        if (!arguments.length) { return _notesEnabled; }
+	          }
 
-	        _notesEnabled = val;
-	        if (_notesEnabled) {
-	            layerOn();
-	        } else {
-	            layerOff();
-	            if (context.selectedNoteID()) {
-	                context.enter(modeBrowse(context));
+	          if (zAxisDifferentiates) continue;
+	          issues.push(new validationIssue({
+	            type: type,
+	            subtype: 'detached',
+	            severity: 'warning',
+	            message: function message(context) {
+	              var entity = context.hasEntity(this.entityIds[0]),
+	                  entity2 = context.hasEntity(this.entityIds[1]);
+	              return entity && entity2 ? _t.html('issues.close_nodes.detached.message', {
+	                feature: utilDisplayLabel(entity, context.graph()),
+	                feature2: utilDisplayLabel(entity2, context.graph())
+	              }) : '';
+	            },
+	            reference: showReference,
+	            entityIds: [node.id, nearby.id],
+	            dynamicFixes: function dynamicFixes() {
+	              return [new validationIssueFix({
+	                icon: 'iD-operation-disconnect',
+	                title: _t.html('issues.fix.move_points_apart.title')
+	              }), new validationIssueFix({
+	                icon: 'iD-icon-layers',
+	                title: _t.html('issues.fix.use_different_layers_or_levels.title')
+	              })];
 	            }
+	          }));
 	        }
+	      }
 
-	        dispatch$1.call('change');
-	        return this;
-	    };
+	      return issues;
 
+	      function showReference(selection) {
+	        var referenceText = _t('issues.close_nodes.detached.reference');
+	        selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
+	      }
+	    }
 
-	    return drawNotes;
-	}
+	    function getWayIssueIfAny(node1, node2, way) {
+	      if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
+	        return null;
+	      }
 
-	function svgTouch() {
+	      if (node1.loc !== node2.loc) {
+	        var parentWays1 = graph.parentWays(node1);
+	        var parentWays2 = new Set(graph.parentWays(node2));
+	        var sharedWays = parentWays1.filter(function (parentWay) {
+	          return parentWays2.has(parentWay);
+	        });
+	        var thresholds = sharedWays.map(function (parentWay) {
+	          return thresholdMetersForWay(parentWay);
+	        });
+	        var threshold = Math.min.apply(Math, _toConsumableArray(thresholds));
+	        var distance = geoSphericalDistance(node1.loc, node2.loc);
+	        if (distance > threshold) return null;
+	      }
 
-	    function drawTouch(selection) {
-	        selection.selectAll('.layer-touch')
-	            .data(['areas', 'lines', 'points', 'turns', 'markers'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'layer-touch ' + d; });
+	      return new validationIssue({
+	        type: type,
+	        subtype: 'vertices',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.close_nodes.message', {
+	            way: utilDisplayLabel(entity, context.graph())
+	          }) : '';
+	        },
+	        reference: showReference,
+	        entityIds: [way.id, node1.id, node2.id],
+	        loc: node1.loc,
+	        dynamicFixes: function dynamicFixes() {
+	          return [new validationIssueFix({
+	            icon: 'iD-icon-plus',
+	            title: _t.html('issues.fix.merge_points.title'),
+	            onClick: function onClick(context) {
+	              var entityIds = this.issue.entityIds;
+	              var action = actionMergeNodes([entityIds[1], entityIds[2]]);
+	              context.perform(action, _t('issues.fix.merge_close_vertices.annotation'));
+	            }
+	          }), new validationIssueFix({
+	            icon: 'iD-operation-disconnect',
+	            title: _t.html('issues.fix.move_points_apart.title')
+	          })];
+	        }
+	      });
+
+	      function showReference(selection) {
+	        var referenceText = _t('issues.close_nodes.reference');
+	        selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
+	      }
 	    }
+	  };
 
-	    return drawTouch;
+	  validation.type = type;
+	  return validation;
 	}
 
-	function refresh(selection, node) {
-	    var cr = node.getBoundingClientRect();
-	    var prop = [cr.width, cr.height];
-	    selection.property('__dimensions__', prop);
-	    return prop;
-	}
+	function validationCrossingWays(context) {
+	  var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type
 
-	function utilGetDimensions(selection, force) {
-	    if (!selection || selection.empty()) {
-	        return [0, 0];
-	    }
-	    var node = selection.node(),
-	        cached = selection.property('__dimensions__');
-	    return (!cached || force) ? refresh(selection, node) : cached;
-	}
+	  function getFeatureWithFeatureTypeTagsForWay(way, graph) {
+	    if (getFeatureType(way, graph) === null) {
+	      // if the way doesn't match a feature type, check its parent relations
+	      var parentRels = graph.parentRelations(way);
 
+	      for (var i = 0; i < parentRels.length; i++) {
+	        var rel = parentRels[i];
 
-	function utilSetDimensions(selection, dimensions) {
-	    if (!selection || selection.empty()) {
-	        return selection;
-	    }
-	    var node = selection.node();
-	    if (dimensions === null) {
-	        refresh(selection, node);
-	        return selection;
+	        if (getFeatureType(rel, graph) !== null) {
+	          return rel;
+	        }
+	      }
 	    }
-	    return selection
-	        .property('__dimensions__', [dimensions[0], dimensions[1]])
-	        .attr('width', dimensions[0])
-	        .attr('height', dimensions[1]);
-	}
 
-	function svgLayers(projection, context) {
-	    var dispatch$1 = dispatch('change');
-	    var svg = select(null);
-	    var _layers = [
-	        { id: 'osm', layer: svgOsm(projection, context, dispatch$1) },
-	        { id: 'notes', layer: svgNotes(projection, context, dispatch$1) },
-	        { id: 'data', layer: svgData(projection, context, dispatch$1) },
-	        { id: 'keepRight', layer: svgKeepRight(projection, context, dispatch$1) },
-	        { id: 'improveOSM', layer: svgImproveOSM(projection, context, dispatch$1) },
-	        { id: 'osmose', layer: svgOsmose(projection, context, dispatch$1) },
-	        { id: 'streetside', layer: svgStreetside(projection, context, dispatch$1)},
-	        { id: 'mapillary', layer: svgMapillaryImages(projection, context, dispatch$1) },
-	        { id: 'mapillary-map-features',  layer: svgMapillaryMapFeatures(projection, context, dispatch$1) },
-	        { id: 'mapillary-signs',  layer: svgMapillarySigns(projection, context, dispatch$1) },
-	        { id: 'openstreetcam', layer: svgOpenstreetcamImages(projection, context, dispatch$1) },
-	        { id: 'debug', layer: svgDebug(projection, context) },
-	        { id: 'geolocate', layer: svgGeolocate(projection) },
-	        { id: 'touch', layer: svgTouch() }
-	    ];
-
-
-	    function drawLayers(selection) {
-	        svg = selection.selectAll('.surface')
-	            .data([0]);
-
-	        svg = svg.enter()
-	            .append('svg')
-	            .attr('class', 'surface')
-	            .merge(svg);
-
-	        var defs = svg.selectAll('.surface-defs')
-	            .data([0]);
-
-	        defs.enter()
-	            .append('defs')
-	            .attr('class', 'surface-defs');
-
-	        var groups = svg.selectAll('.data-layer')
-	            .data(_layers);
-
-	        groups.exit()
-	            .remove();
-
-	        groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'data-layer ' + d.id; })
-	            .merge(groups)
-	            .each(function(d) { select(this).call(d.layer); });
-	    }
-
-
-	    drawLayers.all = function() {
-	        return _layers;
-	    };
+	    return way;
+	  }
 
+	  function hasTag(tags, key) {
+	    return tags[key] !== undefined && tags[key] !== 'no';
+	  }
 
-	    drawLayers.layer = function(id) {
-	        var obj = _layers.find(function(o) { return o.id === id; });
-	        return obj && obj.layer;
-	    };
+	  function taggedAsIndoor(tags) {
+	    return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
+	  }
 
+	  function allowsBridge(featureType) {
+	    return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+	  }
 
-	    drawLayers.only = function(what) {
-	        var arr = [].concat(what);
-	        var all = _layers.map(function(layer) { return layer.id; });
-	        return drawLayers.remove(utilArrayDifference(all, arr));
-	    };
+	  function allowsTunnel(featureType) {
+	    return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+	  } // discard
 
 
-	    drawLayers.remove = function(what) {
-	        var arr = [].concat(what);
-	        arr.forEach(function(id) {
-	            _layers = _layers.filter(function(o) { return o.id !== id; });
-	        });
-	        dispatch$1.call('change');
-	        return this;
-	    };
+	  var ignoredBuildings = {
+	    demolished: true,
+	    dismantled: true,
+	    proposed: true,
+	    razed: true
+	  };
 
+	  function getFeatureType(entity, graph) {
+	    var geometry = entity.geometry(graph);
+	    if (geometry !== 'line' && geometry !== 'area') return null;
+	    var tags = entity.tags;
+	    if (hasTag(tags, 'building') && !ignoredBuildings[tags.building]) return 'building';
+	    if (hasTag(tags, 'highway') && osmRoutableHighwayTagValues[tags.highway]) return 'highway'; // don't check railway or waterway areas
 
-	    drawLayers.add = function(what) {
-	        var arr = [].concat(what);
-	        arr.forEach(function(obj) {
-	            if ('id' in obj && 'layer' in obj) {
-	                _layers.push(obj);
-	            }
-	        });
-	        dispatch$1.call('change');
-	        return this;
-	    };
+	    if (geometry !== 'line') return null;
+	    if (hasTag(tags, 'railway') && osmRailwayTrackTagValues[tags.railway]) return 'railway';
+	    if (hasTag(tags, 'waterway') && osmFlowingWaterwayTagValues[tags.waterway]) return 'waterway';
+	    return null;
+	  }
 
+	  function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
+	    // assume 0 by default
+	    var level1 = tags1.level || '0';
+	    var level2 = tags2.level || '0';
 
-	    drawLayers.dimensions = function(val) {
-	        if (!arguments.length) { return utilGetDimensions(svg); }
-	        utilSetDimensions(svg, val);
-	        return this;
-	    };
+	    if (taggedAsIndoor(tags1) && taggedAsIndoor(tags2) && level1 !== level2) {
+	      // assume features don't interact if they're indoor on different levels
+	      return true;
+	    } // assume 0 by default; don't use way.layer() since we account for structures here
 
 
-	    return utilRebind(drawLayers, dispatch$1, 'on');
-	}
+	    var layer1 = tags1.layer || '0';
+	    var layer2 = tags2.layer || '0';
 
-	function svgLines(projection, context) {
-	    var detected = utilDetect();
+	    if (allowsBridge(featureType1) && allowsBridge(featureType2)) {
+	      if (hasTag(tags1, 'bridge') && !hasTag(tags2, 'bridge')) return true;
+	      if (!hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge')) return true; // crossing bridges must use different layers
 
-	    var highway_stack = {
-	        motorway: 0,
-	        motorway_link: 1,
-	        trunk: 2,
-	        trunk_link: 3,
-	        primary: 4,
-	        primary_link: 5,
-	        secondary: 6,
-	        tertiary: 7,
-	        unclassified: 8,
-	        residential: 9,
-	        service: 10,
-	        footway: 11
-	    };
+	      if (hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge') && layer1 !== layer2) return true;
+	    } else if (allowsBridge(featureType1) && hasTag(tags1, 'bridge')) return true;else if (allowsBridge(featureType2) && hasTag(tags2, 'bridge')) return true;
 
+	    if (allowsTunnel(featureType1) && allowsTunnel(featureType2)) {
+	      if (hasTag(tags1, 'tunnel') && !hasTag(tags2, 'tunnel')) return true;
+	      if (!hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel')) return true; // crossing tunnels must use different layers
 
-	    function drawTargets(selection, graph, entities, filter) {
-	        var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-	        var getPath = svgPath(projection).geojson;
-	        var activeID = context.activeID();
-	        var base = context.history().base();
+	      if (hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel') && layer1 !== layer2) return true;
+	    } else if (allowsTunnel(featureType1) && hasTag(tags1, 'tunnel')) return true;else if (allowsTunnel(featureType2) && hasTag(tags2, 'tunnel')) return true; // don't flag crossing waterways and pier/highways
 
-	        // The targets and nopes will be MultiLineString sub-segments of the ways
-	        var data = { targets: [], nopes: [] };
 
-	        entities.forEach(function(way) {
-	            var features = svgSegmentWay(way, graph, activeID);
-	            data.targets.push.apply(data.targets, features.passive);
-	            data.nopes.push.apply(data.nopes, features.active);
-	        });
+	    if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
+	    if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;
 
+	    if (featureType1 === 'building' || featureType2 === 'building') {
+	      // for building crossings, different layers are enough
+	      if (layer1 !== layer2) return true;
+	    }
 
-	        // Targets allow hover and vertex snapping
-	        var targetData = data.targets.filter(getPath);
-	        var targets = selection.selectAll('.line.target-allowed')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(targetData, function key(d) { return d.id; });
+	    return false;
+	  } // highway values for which we shouldn't recommend connecting to waterways
 
-	        // exit
-	        targets.exit()
-	            .remove();
 
-	        var segmentWasEdited = function(d) {
-	            var wayID = d.properties.entity.id;
-	            // if the whole line was edited, don't draw segment changes
-	            if (!base.entities[wayID] ||
-	                !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-	                return false;
-	            }
-	            return d.properties.nodes.some(function(n) {
-	                return !base.entities[n.id] ||
-	                       !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
-	            });
-	        };
+	  var highwaysDisallowingFords = {
+	    motorway: true,
+	    motorway_link: true,
+	    trunk: true,
+	    trunk_link: true,
+	    primary: true,
+	    primary_link: true,
+	    secondary: true,
+	    secondary_link: true
+	  };
+	  var nonCrossingHighways = {
+	    track: true
+	  };
 
-	        // enter/update
-	        targets.enter()
-	            .append('path')
-	            .merge(targets)
-	            .attr('d', getPath)
-	            .attr('class', function(d) {
-	                return 'way line target target-allowed ' + targetClass + d.id;
-	            })
-	            .classed('segment-edited', segmentWasEdited);
-
-	        // NOPE
-	        var nopeData = data.nopes.filter(getPath);
-	        var nopes = selection.selectAll('.line.target-nope')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(nopeData, function key(d) { return d.id; });
-
-	        // exit
-	        nopes.exit()
-	            .remove();
-
-	        // enter/update
-	        nopes.enter()
-	            .append('path')
-	            .merge(nopes)
-	            .attr('d', getPath)
-	            .attr('class', function(d) {
-	                return 'way line target target-nope ' + nopeClass + d.id;
-	            })
-	            .classed('segment-edited', segmentWasEdited);
-	    }
-
-
-	    function drawLines(selection, graph, entities, filter) {
-	        var base = context.history().base();
-
-	        function waystack(a, b) {
-	            var selected = context.selectedIDs();
-	            var scoreA = selected.indexOf(a.id) !== -1 ? 20 : 0;
-	            var scoreB = selected.indexOf(b.id) !== -1 ? 20 : 0;
-
-	            if (a.tags.highway) { scoreA -= highway_stack[a.tags.highway]; }
-	            if (b.tags.highway) { scoreB -= highway_stack[b.tags.highway]; }
-	            return scoreA - scoreB;
-	        }
-
-
-	        function drawLineGroup(selection, klass, isSelected) {
-	            // Note: Don't add `.selected` class in draw modes
-	            var mode = context.mode();
-	            var isDrawing = mode && /^draw/.test(mode.id);
-	            var selectedClass = (!isDrawing && isSelected) ? 'selected ' : '';
-
-	            var lines = selection
-	                .selectAll('path')
-	                .filter(filter)
-	                .data(getPathData(isSelected), osmEntity.key);
-
-	            lines.exit()
-	                .remove();
-
-	            // Optimization: Call expensive TagClasses only on enter selection. This
-	            // works because osmEntity.key is defined to include the entity v attribute.
-	            lines.enter()
-	                .append('path')
-	                .attr('class', function(d) {
-
-	                    var prefix = 'way line';
-
-	                    // if this line isn't styled by its own tags
-	                    if (!d.hasInterestingTags()) {
-
-	                        var parentRelations = graph.parentRelations(d);
-	                        var parentMultipolygons = parentRelations.filter(function(relation) {
-	                            return relation.isMultipolygon();
-	                        });
-
-	                        // and if it's a member of at least one multipolygon relation
-	                        if (parentMultipolygons.length > 0 &&
-	                            // and only multipolygon relations
-	                            parentRelations.length === parentMultipolygons.length) {
-	                            // then fudge the classes to style this as an area edge
-	                            prefix = 'relation area';
-	                        }
-	                    }
+	  function tagsForConnectionNodeIfAllowed(entity1, entity2, graph) {
+	    var featureType1 = getFeatureType(entity1, graph);
+	    var featureType2 = getFeatureType(entity2, graph);
+	    var geometry1 = entity1.geometry(graph);
+	    var geometry2 = entity2.geometry(graph);
+	    var bothLines = geometry1 === 'line' && geometry2 === 'line';
 
-	                    var oldMPClass = oldMultiPolygonOuters[d.id] ? 'old-multipolygon ' : '';
-	                    return prefix + ' ' + klass + ' ' + selectedClass + oldMPClass + d.id;
-	                })
-	                .classed('added', function(d) {
-	                    return !base.entities[d.id];
-	                })
-	                .classed('geometry-edited', function(d) {
-	                    return graph.entities[d.id] &&
-	                        base.entities[d.id] &&
-	                        !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
-	                })
-	                .classed('retagged', function(d) {
-	                    return graph.entities[d.id] &&
-	                        base.entities[d.id] &&
-	                        !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-	                })
-	                .call(svgTagClasses())
-	                .merge(lines)
-	                .sort(waystack)
-	                .attr('d', getPath)
-	                .call(svgTagClasses().tags(svgRelationMemberTags(graph)));
+	    if (featureType1 === featureType2) {
+	      if (featureType1 === 'highway') {
+	        var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
+	        var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
 
-	            return selection;
-	        }
+	        if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
+	          // one feature is a path but not both
+	          var roadFeature = entity1IsPath ? entity2 : entity1;
 
+	          if (nonCrossingHighways[roadFeature.tags.highway]) {
+	            // don't mark path connections with certain roads as crossings
+	            return {};
+	          }
 
-	        function getPathData(isSelected) {
-	            return function() {
-	                var layer = this.parentNode.__data__;
-	                var data = pathdata[layer] || [];
-	                return data.filter(function(d) {
-	                    if (isSelected)
-	                        { return context.selectedIDs().indexOf(d.id) !== -1; }
-	                    else
-	                        { return context.selectedIDs().indexOf(d.id) === -1; }
-	                });
-	            };
-	        }
+	          var pathFeature = entity1IsPath ? entity1 : entity2;
 
-	        function addMarkers(layergroup, pathclass, groupclass, groupdata, marker) {
-	            var markergroup = layergroup
-	                .selectAll('g.' + groupclass)
-	                .data([pathclass]);
+	          if (['marked', 'unmarked'].indexOf(pathFeature.tags.crossing) !== -1) {
+	            // if the path is a crossing, match the crossing type
+	            return bothLines ? {
+	              highway: 'crossing',
+	              crossing: pathFeature.tags.crossing
+	            } : {};
+	          } // don't add a `crossing` subtag to ambiguous crossings
 
-	            markergroup = markergroup.enter()
-	                .append('g')
-	                .attr('class', groupclass)
-	                .merge(markergroup);
 
-	            var markers = markergroup
-	                .selectAll('path')
-	                .filter(filter)
-	                .data(
-	                    function data() { return groupdata[this.parentNode.__data__] || []; },
-	                    function key(d) { return [d.id, d.index]; }
-	                );
+	          return bothLines ? {
+	            highway: 'crossing'
+	          } : {};
+	        }
 
-	            markers.exit()
-	                .remove();
+	        return {};
+	      }
 
-	            markers = markers.enter()
-	                .append('path')
-	                .attr('class', pathclass)
-	                .merge(markers)
-	                .attr('marker-mid', marker)
-	                .attr('d', function(d) { return d.d; });
+	      if (featureType1 === 'waterway') return {};
+	      if (featureType1 === 'railway') return {};
+	    } else {
+	      var featureTypes = [featureType1, featureType2];
 
-	            if (detected.ie) {
-	                markers.each(function() { this.parentNode.insertBefore(this, this); });
-	            }
-	        }
+	      if (featureTypes.indexOf('highway') !== -1) {
+	        if (featureTypes.indexOf('railway') !== -1) {
+	          if (!bothLines) return {};
+	          var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';
 
+	          if (osmPathHighwayTagValues[entity1.tags.highway] || osmPathHighwayTagValues[entity2.tags.highway]) {
+	            // path-tram connections use this tag
+	            if (isTram) return {
+	              railway: 'tram_crossing'
+	            }; // other path-rail connections use this tag
 
-	        var getPath = svgPath(projection, graph);
-	        var ways = [];
-	        var onewaydata = {};
-	        var sideddata = {};
-	        var oldMultiPolygonOuters = {};
+	            return {
+	              railway: 'crossing'
+	            };
+	          } else {
+	            // path-tram connections use this tag
+	            if (isTram) return {
+	              railway: 'tram_level_crossing'
+	            }; // other road-rail connections use this tag
 
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            var outer = osmOldMultipolygonOuterMember(entity, graph);
-	            if (outer) {
-	                ways.push(entity.mergeTags(outer.tags));
-	                oldMultiPolygonOuters[outer.id] = true;
-	            } else if (entity.geometry(graph) === 'line') {
-	                ways.push(entity);
-	            }
+	            return {
+	              railway: 'level_crossing'
+	            };
+	          }
 	        }
 
-	        ways = ways.filter(getPath);
-	        var pathdata = utilArrayGroupBy(ways, function(way) { return way.layer(); });
-
-	        Object.keys(pathdata).forEach(function(k) {
-	            var v = pathdata[k];
-	            var onewayArr = v.filter(function(d) { return d.isOneWay(); });
-	            var onewaySegments = svgMarkerSegments(
-	                projection, graph, 35,
-	                function shouldReverse(entity) { return entity.tags.oneway === '-1'; },
-	                function bothDirections(entity) {
-	                    return entity.tags.oneway === 'reversible' || entity.tags.oneway === 'alternating';
-	                }
-	            );
-	            onewaydata[k] = utilArrayFlatten(onewayArr.map(onewaySegments));
-
-	            var sidedArr = v.filter(function(d) { return d.isSided(); });
-	            var sidedSegments = svgMarkerSegments(
-	                projection, graph, 30,
-	                function shouldReverse() { return false; },
-	                function bothDirections() { return false; }
-	            );
-	            sideddata[k] = utilArrayFlatten(sidedArr.map(sidedSegments));
-	        });
-
+	        if (featureTypes.indexOf('waterway') !== -1) {
+	          // do not allow fords on structures
+	          if (hasTag(entity1.tags, 'tunnel') && hasTag(entity2.tags, 'tunnel')) return null;
+	          if (hasTag(entity1.tags, 'bridge') && hasTag(entity2.tags, 'bridge')) return null;
 
-	        var covered = selection.selectAll('.layer-osm.covered');     // under areas
-	        var uncovered = selection.selectAll('.layer-osm.lines');     // over areas
-	        var touchLayer = selection.selectAll('.layer-touch.lines');
-
-	        // Draw lines..
-	        [covered, uncovered].forEach(function(selection) {
-	            var range = (selection === covered ? range$1(-10,0) : range$1(0,11));
-	            var layergroup = selection
-	                .selectAll('g.layergroup')
-	                .data(range);
-
-	            layergroup = layergroup.enter()
-	                .append('g')
-	                .attr('class', function(d) { return 'layergroup layer' + String(d); })
-	                .merge(layergroup);
-
-	            layergroup
-	                .selectAll('g.linegroup')
-	                .data(['shadow', 'casing', 'stroke', 'shadow-highlighted', 'casing-highlighted', 'stroke-highlighted'])
-	                .enter()
-	                .append('g')
-	                .attr('class', function(d) { return 'linegroup line-' + d; });
-
-	            layergroup.selectAll('g.line-shadow')
-	                .call(drawLineGroup, 'shadow', false);
-	            layergroup.selectAll('g.line-casing')
-	                .call(drawLineGroup, 'casing', false);
-	            layergroup.selectAll('g.line-stroke')
-	                .call(drawLineGroup, 'stroke', false);
-
-	            layergroup.selectAll('g.line-shadow-highlighted')
-	                .call(drawLineGroup, 'shadow', true);
-	            layergroup.selectAll('g.line-casing-highlighted')
-	                .call(drawLineGroup, 'casing', true);
-	            layergroup.selectAll('g.line-stroke-highlighted')
-	                .call(drawLineGroup, 'stroke', true);
-
-	            addMarkers(layergroup, 'oneway', 'onewaygroup', onewaydata, 'url(#ideditor-oneway-marker)');
-	            addMarkers(layergroup, 'sided', 'sidedgroup', sideddata,
-	                function marker(d) {
-	                    var category = graph.entity(d.id).sidednessIdentifier();
-	                    return 'url(#ideditor-sided-marker-' + category + ')';
-	                }
-	            );
-	        });
+	          if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
+	            // do not allow fords on major highways
+	            return null;
+	          }
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, ways, filter);
+	          return bothLines ? {
+	            ford: 'yes'
+	          } : {};
+	        }
+	      }
 	    }
 
+	    return null;
+	  }
 
-	    return drawLines;
-	}
-
-	function svgMidpoints(projection, context) {
-	    var targetRadius = 8;
-
-	    function drawTargets(selection, graph, entities, filter) {
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var getTransform = svgPointTransform(projection).geojson;
+	  function findCrossingsByWay(way1, graph, tree) {
+	    var edgeCrossInfos = [];
+	    if (way1.type !== 'way') return edgeCrossInfos;
+	    var taggedFeature1 = getFeatureWithFeatureTypeTagsForWay(way1, graph);
+	    var way1FeatureType = getFeatureType(taggedFeature1, graph);
+	    if (way1FeatureType === null) return edgeCrossInfos;
+	    var checkedSingleCrossingWays = {}; // declare vars ahead of time to reduce garbage collection
 
-	        var data = entities.map(function(midpoint) {
-	            return {
-	                type: 'Feature',
-	                id: midpoint.id,
-	                properties: {
-	                    target: true,
-	                    entity: midpoint
-	                },
-	                geometry: {
-	                    type: 'Point',
-	                    coordinates: midpoint.loc
-	                }
-	            };
-	        });
+	    var i, j;
+	    var extent;
+	    var n1, n2, nA, nB, nAId, nBId;
+	    var segment1, segment2;
+	    var oneOnly;
+	    var segmentInfos, segment2Info, way2, taggedFeature2, way2FeatureType;
+	    var way1Nodes = graph.childNodes(way1);
+	    var comparedWays = {};
 
-	        var targets = selection.selectAll('.midpoint.target')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data, function key(d) { return d.id; });
+	    for (i = 0; i < way1Nodes.length - 1; i++) {
+	      n1 = way1Nodes[i];
+	      n2 = way1Nodes[i + 1];
+	      extent = geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]); // Optimize by only checking overlapping segments, not every segment
+	      // of overlapping ways
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	      segmentInfos = tree.waySegments(extent, graph);
 
-	        // enter/update
-	        targets.enter()
-	            .append('circle')
-	            .attr('r', targetRadius)
-	            .merge(targets)
-	            .attr('class', function(d) { return 'node midpoint target ' + fillClass + d.id; })
-	            .attr('transform', getTransform);
-	    }
+	      for (j = 0; j < segmentInfos.length; j++) {
+	        segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation
 
+	        if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed
 
-	    function drawMidpoints(selection, graph, entities, filter, extent) {
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.midpoints');
-	        var touchLayer = selection.selectAll('.layer-touch.points');
+	        if (checkedSingleCrossingWays[segment2Info.wayId]) continue; // mark this way as checked even if there are no crossings
 
-	        var mode = context.mode();
-	        if ((mode && mode.id !== 'select') || !context.map().withinEditableZoom()) {
-	            drawLayer.selectAll('.midpoint').remove();
-	            touchLayer.selectAll('.midpoint.target').remove();
-	            return;
-	        }
+	        comparedWays[segment2Info.wayId] = true;
+	        way2 = graph.hasEntity(segment2Info.wayId);
+	        if (!way2) continue;
+	        taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway
 
-	        var poly = extent.polygon();
-	        var midpoints = {};
+	        way2FeatureType = getFeatureType(taggedFeature2, graph);
 
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
+	        if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
+	          continue;
+	        } // create only one issue for building crossings
 
-	            if (entity.type !== 'way') { continue; }
-	            if (!filter(entity)) { continue; }
-	            if (context.selectedIDs().indexOf(entity.id) < 0) { continue; }
 
-	            var nodes = graph.childNodes(entity);
-	            for (var j = 0; j < nodes.length - 1; j++) {
-	                var a = nodes[j];
-	                var b = nodes[j + 1];
-	                var id = [a.id, b.id].sort().join('-');
+	        oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+	        nAId = segment2Info.nodes[0];
+	        nBId = segment2Info.nodes[1];
 
-	                if (midpoints[id]) {
-	                    midpoints[id].parents.push(entity);
-	                } else if (geoVecLength(projection(a.loc), projection(b.loc)) > 40) {
-	                    var point = geoVecInterp(a.loc, b.loc, 0.5);
-	                    var loc = null;
+	        if (nAId === n1.id || nAId === n2.id || nBId === n1.id || nBId === n2.id) {
+	          // n1 or n2 is a connection node; skip
+	          continue;
+	        }
 
-	                    if (extent.intersects(point)) {
-	                        loc = point;
-	                    } else {
-	                        for (var k = 0; k < 4; k++) {
-	                            point = geoLineIntersection([a.loc, b.loc], [poly[k], poly[k + 1]]);
-	                            if (point &&
-	                                geoVecLength(projection(a.loc), projection(point)) > 20 &&
-	                                geoVecLength(projection(b.loc), projection(point)) > 20)
-	                            {
-	                                loc = point;
-	                                break;
-	                            }
-	                        }
-	                    }
+	        nA = graph.hasEntity(nAId);
+	        if (!nA) continue;
+	        nB = graph.hasEntity(nBId);
+	        if (!nB) continue;
+	        segment1 = [n1.loc, n2.loc];
+	        segment2 = [nA.loc, nB.loc];
+	        var point = geoLineIntersection(segment1, segment2);
+
+	        if (point) {
+	          edgeCrossInfos.push({
+	            wayInfos: [{
+	              way: way1,
+	              featureType: way1FeatureType,
+	              edge: [n1.id, n2.id]
+	            }, {
+	              way: way2,
+	              featureType: way2FeatureType,
+	              edge: [nA.id, nB.id]
+	            }],
+	            crossPoint: point
+	          });
 
-	                    if (loc) {
-	                        midpoints[id] = {
-	                            type: 'midpoint',
-	                            id: id,
-	                            loc: loc,
-	                            edge: [a.id, b.id],
-	                            parents: [entity]
-	                        };
-	                    }
-	                }
-	            }
+	          if (oneOnly) {
+	            checkedSingleCrossingWays[way2.id] = true;
+	            break;
+	          }
 	        }
+	      }
+	    }
 
+	    return edgeCrossInfos;
+	  }
 
-	        function midpointFilter(d) {
-	            if (midpoints[d.id])
-	                { return true; }
+	  function waysToCheck(entity, graph) {
+	    var featureType = getFeatureType(entity, graph);
+	    if (!featureType) return [];
 
-	            for (var i = 0; i < d.parents.length; i++) {
-	                if (filter(d.parents[i])) {
-	                    return true;
-	                }
-	            }
+	    if (entity.type === 'way') {
+	      return [entity];
+	    } else if (entity.type === 'relation') {
+	      return entity.members.reduce(function (array, member) {
+	        if (member.type === 'way' && ( // only look at geometry ways
+	        !member.role || member.role === 'outer' || member.role === 'inner')) {
+	          var entity = graph.hasEntity(member.id); // don't add duplicates
 
-	            return false;
+	          if (entity && array.indexOf(entity) === -1) {
+	            array.push(entity);
+	          }
 	        }
 
+	        return array;
+	      }, []);
+	    }
 
-	        var groups = drawLayer.selectAll('.midpoint')
-	            .filter(midpointFilter)
-	            .data(Object.values(midpoints), function(d) { return d.id; });
-
-	        groups.exit()
-	            .remove();
-
-	        var enter = groups.enter()
-	            .insert('g', ':first-child')
-	            .attr('class', 'midpoint');
+	    return [];
+	  }
 
-	        enter
-	            .append('polygon')
-	            .attr('points', '-6,8 10,0 -6,-8')
-	            .attr('class', 'shadow');
+	  var validation = function checkCrossingWays(entity, graph) {
+	    var tree = context.history().tree();
+	    var ways = waysToCheck(entity, graph);
+	    var issues = []; // declare these here to reduce garbage collection
 
-	        enter
-	            .append('polygon')
-	            .attr('points', '-3,4 5,0 -3,-4')
-	            .attr('class', 'fill');
+	    var wayIndex, crossingIndex, crossings;
 
-	        groups = groups
-	            .merge(enter)
-	            .attr('transform', function(d) {
-	                var translate = svgPointTransform(projection);
-	                var a = graph.entity(d.edge[0]);
-	                var b = graph.entity(d.edge[1]);
-	                var angle = geoAngle(a, b, projection) * (180 / Math.PI);
-	                return translate(d) + ' rotate(' + angle + ')';
-	            })
-	            .call(svgTagClasses().tags(
-	                function(d) { return d.parents[0].tags; }
-	            ));
+	    for (wayIndex in ways) {
+	      crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
 
-	        // Propagate data bindings.
-	        groups.select('polygon.shadow');
-	        groups.select('polygon.fill');
+	      for (crossingIndex in crossings) {
+	        issues.push(createIssue(crossings[crossingIndex], graph));
+	      }
+	    }
 
+	    return issues;
+	  };
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, Object.values(midpoints), midpointFilter);
-	    }
+	  function createIssue(crossing, graph) {
+	    // use the entities with the tags that define the feature type
+	    crossing.wayInfos.sort(function (way1Info, way2Info) {
+	      var type1 = way1Info.featureType;
+	      var type2 = way2Info.featureType;
 
-	    return drawMidpoints;
-	}
+	      if (type1 === type2) {
+	        return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
+	      } else if (type1 === 'waterway') {
+	        return true;
+	      } else if (type2 === 'waterway') {
+	        return false;
+	      }
 
-	function svgPoints(projection, context) {
+	      return type1 < type2;
+	    });
+	    var entities = crossing.wayInfos.map(function (wayInfo) {
+	      return getFeatureWithFeatureTypeTagsForWay(wayInfo.way, graph);
+	    });
+	    var edges = [crossing.wayInfos[0].edge, crossing.wayInfos[1].edge];
+	    var featureTypes = [crossing.wayInfos[0].featureType, crossing.wayInfos[1].featureType];
+	    var connectionTags = tagsForConnectionNodeIfAllowed(entities[0], entities[1], graph);
+	    var featureType1 = crossing.wayInfos[0].featureType;
+	    var featureType2 = crossing.wayInfos[1].featureType;
+	    var isCrossingIndoors = taggedAsIndoor(entities[0].tags) && taggedAsIndoor(entities[1].tags);
+	    var isCrossingTunnels = allowsTunnel(featureType1) && hasTag(entities[0].tags, 'tunnel') && allowsTunnel(featureType2) && hasTag(entities[1].tags, 'tunnel');
+	    var isCrossingBridges = allowsBridge(featureType1) && hasTag(entities[0].tags, 'bridge') && allowsBridge(featureType2) && hasTag(entities[1].tags, 'bridge');
+	    var subtype = [featureType1, featureType2].sort().join('-');
+	    var crossingTypeID = subtype;
 
-	    function markerPath(selection, klass) {
-	        selection
-	            .attr('class', klass)
-	            .attr('transform', 'translate(-8, -23)')
-	            .attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+	    if (isCrossingIndoors) {
+	      crossingTypeID = 'indoor-indoor';
+	    } else if (isCrossingTunnels) {
+	      crossingTypeID = 'tunnel-tunnel';
+	    } else if (isCrossingBridges) {
+	      crossingTypeID = 'bridge-bridge';
 	    }
 
-	    function sortY(a, b) {
-	        return b.loc[1] - a.loc[1];
+	    if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
+	      crossingTypeID += '_connectable';
 	    }
 
-
-	    // Avoid exit/enter if we're just moving stuff around.
-	    // The node will get a new version but we only need to run the update selection.
-	    function fastEntityKey(d) {
+	    return new validationIssue({
+	      type: type,
+	      subtype: subtype,
+	      severity: 'warning',
+	      message: function message(context) {
+	        var graph = context.graph();
+	        var entity1 = graph.hasEntity(this.entityIds[0]),
+	            entity2 = graph.hasEntity(this.entityIds[1]);
+	        return entity1 && entity2 ? _t.html('issues.crossing_ways.message', {
+	          feature: utilDisplayLabel(entity1, graph),
+	          feature2: utilDisplayLabel(entity2, graph)
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: entities.map(function (entity) {
+	        return entity.id;
+	      }),
+	      data: {
+	        edges: edges,
+	        featureTypes: featureTypes,
+	        connectionTags: connectionTags
+	      },
+	      // differentiate based on the loc since two ways can cross multiple times
+	      hash: crossing.crossPoint.toString() + // if the edges change then so does the fix
+	      edges.slice().sort(function (edge1, edge2) {
+	        // order to assure hash is deterministic
+	        return edge1[0] < edge2[0] ? -1 : 1;
+	      }).toString() + // ensure the correct connection tags are added in the fix
+	      JSON.stringify(connectionTags),
+	      loc: crossing.crossPoint,
+	      dynamicFixes: function dynamicFixes(context) {
 	        var mode = context.mode();
-	        var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-	        return isMoving ? d.id : osmEntity.key(d);
-	    }
-
+	        if (!mode || mode.id !== 'select' || mode.selectedIDs().length !== 1) return [];
+	        var selectedIndex = this.entityIds[0] === mode.selectedIDs()[0] ? 0 : 1;
+	        var selectedFeatureType = this.data.featureTypes[selectedIndex];
+	        var otherFeatureType = this.data.featureTypes[selectedIndex === 0 ? 1 : 0];
+	        var fixes = [];
 
-	    function drawTargets(selection, graph, entities, filter) {
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var getTransform = svgPointTransform(projection).geojson;
-	        var activeID = context.activeID();
-	        var data = [];
-
-	        entities.forEach(function(node) {
-	            if (activeID === node.id) { return; }   // draw no target on the activeID
-
-	            data.push({
-	                type: 'Feature',
-	                id: node.id,
-	                properties: {
-	                    target: true,
-	                    entity: node
-	                },
-	                geometry: node.asGeoJSON()
-	            });
-	        });
+	        if (connectionTags) {
+	          fixes.push(makeConnectWaysFix(this.data.connectionTags));
+	        }
 
-	        var targets = selection.selectAll('.point.target')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data, function key(d) { return d.id; });
-
-	        // exit
-	        targets.exit()
-	            .remove();
-
-	        // enter/update
-	        targets.enter()
-	            .append('rect')
-	            .attr('x', -10)
-	            .attr('y', -26)
-	            .attr('width', 20)
-	            .attr('height', 30)
-	            .merge(targets)
-	            .attr('class', function(d) { return 'node point target ' + fillClass + d.id; })
-	            .attr('transform', getTransform);
-	    }
-
-
-	    function drawPoints(selection, graph, entities, filter) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
-	        var base = context.history().base();
-
-	        // Points with a direction will render as vertices at higher zooms..
-	        function renderAsPoint(entity) {
-	            return entity.geometry(graph) === 'point' &&
-	                !(zoom >= 18 && entity.directions(graph, projection).length);
-	        }
-
-	        // All points will render as vertices in wireframe mode too..
-	        var points = wireframe ? [] : entities.filter(renderAsPoint);
-	        points.sort(sortY);
-
-
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.points');
-	        var touchLayer = selection.selectAll('.layer-touch.points');
-
-	        // Draw points..
-	        var groups = drawLayer.selectAll('g.point')
-	            .filter(filter)
-	            .data(points, fastEntityKey);
-
-	        groups.exit()
-	            .remove();
-
-	        var enter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'node point ' + d.id; })
-	            .order();
-
-	        enter
-	            .append('path')
-	            .call(markerPath, 'shadow');
-
-	        enter
-	            .append('ellipse')
-	            .attr('cx', 0.5)
-	            .attr('cy', 1)
-	            .attr('rx', 6.5)
-	            .attr('ry', 3)
-	            .attr('class', 'stroke');
-
-	        enter
-	            .append('path')
-	            .call(markerPath, 'stroke');
-
-	        enter
-	            .append('use')
-	            .attr('transform', 'translate(-5, -19)')
-	            .attr('class', 'icon')
-	            .attr('width', '11px')
-	            .attr('height', '11px');
-
-	        groups = groups
-	            .merge(enter)
-	            .attr('transform', svgPointTransform(projection))
-	            .classed('added', function(d) {
-	                return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
-	            })
-	            .classed('moved', function(d) {
-	                return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
-	            })
-	            .classed('retagged', function(d) {
-	                return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-	            })
-	            .call(svgTagClasses());
-
-	        groups.select('.shadow');   // propagate bound data
-	        groups.select('.stroke');   // propagate bound data
-	        groups.select('.icon')      // propagate bound data
-	            .attr('xlink:href', function(entity) {
-	                var preset = _mainPresetIndex.match(entity, graph);
-	                var picon = preset && preset.icon;
-
-	                if (!picon) {
-	                    return '';
-	                } else {
-	                    var isMaki = /^maki-/.test(picon);
-	                    return '#' + picon + (isMaki ? '-11' : '');
-	                }
-	            });
+	        if (isCrossingIndoors) {
+	          fixes.push(new validationIssueFix({
+	            icon: 'iD-icon-layers',
+	            title: _t.html('issues.fix.use_different_levels.title')
+	          }));
+	        } else if (isCrossingTunnels || isCrossingBridges || featureType1 === 'building' || featureType2 === 'building') {
+	          fixes.push(makeChangeLayerFix('higher'));
+	          fixes.push(makeChangeLayerFix('lower')); // can only add bridge/tunnel if both features are lines
+	        } else if (context.graph().geometry(this.entityIds[0]) === 'line' && context.graph().geometry(this.entityIds[1]) === 'line') {
+	          // don't recommend adding bridges to waterways since they're uncommon
+	          if (allowsBridge(selectedFeatureType) && selectedFeatureType !== 'waterway') {
+	            fixes.push(makeAddBridgeOrTunnelFix('add_a_bridge', 'temaki-bridge', 'bridge'));
+	          } // don't recommend adding tunnels under waterways since they're uncommon
 
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, points, filter);
-	    }
+	          var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
 
+	          if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
+	            fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
+	          }
+	        } // repositioning the features is always an option
 
-	    return drawPoints;
-	}
 
-	function svgTurns(projection, context) {
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-move',
+	          title: _t.html('issues.fix.reposition_features.title')
+	        }));
+	        return fixes;
+	      }
+	    });
 
-	    function icon(turn) {
-	        var u = turn.u ? '-u' : '';
-	        if (turn.no) { return '#iD-turn-no' + u; }
-	        if (turn.only) { return '#iD-turn-only' + u; }
-	        return '#iD-turn-yes' + u;
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.crossing_ways.' + crossingTypeID + '.reference'));
 	    }
+	  }
 
-	    function drawTurns(selection, graph, turns) {
-
-	        function turnTransform(d) {
-	            var pxRadius = 50;
-	            var toWay = graph.entity(d.to.way);
-	            var toPoints = graph.childNodes(toWay)
-	                .map(function (n) { return n.loc; })
-	                .map(projection);
-	            var toLength = geoPathLength(toPoints);
-	            var mid = toLength / 2;    // midpoint of destination way
-
-	            var toNode = graph.entity(d.to.node);
-	            var toVertex = graph.entity(d.to.vertex);
-	            var a = geoAngle(toVertex, toNode, projection);
-	            var o = projection(toVertex.loc);
-	            var r = d.u ? 0                  // u-turn: no radius
-	                : !toWay.__via ? pxRadius    // leaf way: put marker at pxRadius
-	                : Math.min(mid, pxRadius);   // via way: prefer pxRadius, fallback to mid for very short ways
-
-	            return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' +
-	                'rotate(' + a * 180 / Math.PI + ')';
+	  function makeAddBridgeOrTunnelFix(fixTitleID, iconName, bridgeOrTunnel) {
+	    return new validationIssueFix({
+	      icon: iconName,
+	      title: _t.html('issues.fix.' + fixTitleID + '.title'),
+	      onClick: function onClick(context) {
+	        var mode = context.mode();
+	        if (!mode || mode.id !== 'select') return;
+	        var selectedIDs = mode.selectedIDs();
+	        if (selectedIDs.length !== 1) return;
+	        var selectedWayID = selectedIDs[0];
+	        if (!context.hasEntity(selectedWayID)) return;
+	        var resultWayIDs = [selectedWayID];
+	        var edge, crossedEdge, crossedWayID;
+
+	        if (this.issue.entityIds[0] === selectedWayID) {
+	          edge = this.issue.data.edges[0];
+	          crossedEdge = this.issue.data.edges[1];
+	          crossedWayID = this.issue.entityIds[1];
+	        } else {
+	          edge = this.issue.data.edges[1];
+	          crossedEdge = this.issue.data.edges[0];
+	          crossedWayID = this.issue.entityIds[0];
 	        }
 
+	        var crossingLoc = this.issue.loc;
+	        var projection = context.projection;
 
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
-	        var touchLayer = selection.selectAll('.layer-touch.turns');
+	        var action = function actionAddStructure(graph) {
+	          var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+	          var crossedWay = graph.hasEntity(crossedWayID); // use the explicit width of the crossed feature as the structure length, if available
 
-	        // Draw turns..
-	        var groups = drawLayer.selectAll('g.turn')
-	            .data(turns, function(d) { return d.key; });
+	          var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
 
-	        // exit
-	        groups.exit()
-	            .remove();
+	          if (!structLengthMeters) {
+	            // if no explicit width is set, approximate the width based on the tags
+	            structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
+	          }
 
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'turn ' + d.key; });
+	          if (structLengthMeters) {
+	            if (getFeatureType(crossedWay, graph) === 'railway') {
+	              // bridges over railways are generally much longer than the rail bed itself, compensate
+	              structLengthMeters *= 2;
+	            }
+	          } else {
+	            // should ideally never land here since all rail/water/road tags should have an implied width
+	            structLengthMeters = 8;
+	          }
 
-	        var turnsEnter = groupsEnter
-	            .filter(function(d) { return !d.u; });
+	          var a1 = geoAngle(edgeNodes[0], edgeNodes[1], projection) + Math.PI;
+	          var a2 = geoAngle(graph.entity(crossedEdge[0]), graph.entity(crossedEdge[1]), projection) + Math.PI;
+	          var crossingAngle = Math.max(a1, a2) - Math.min(a1, a2);
+	          if (crossingAngle > Math.PI) crossingAngle -= Math.PI; // lengthen the structure to account for the angle of the crossing
 
-	        turnsEnter.append('rect')
-	            .attr('transform', 'translate(-22, -12)')
-	            .attr('width', '44')
-	            .attr('height', '24');
+	          structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature
 
-	        turnsEnter.append('use')
-	            .attr('transform', 'translate(-22, -12)')
-	            .attr('width', '44')
-	            .attr('height', '24');
+	          structLengthMeters += 4; // clamp the length to a reasonable range
 
-	        var uEnter = groupsEnter
-	            .filter(function(d) { return d.u; });
+	          structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
 
-	        uEnter.append('circle')
-	            .attr('r', '16');
+	          function geomToProj(geoPoint) {
+	            return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
+	          }
 
-	        uEnter.append('use')
-	            .attr('transform', 'translate(-16, -16)')
-	            .attr('width', '32')
-	            .attr('height', '32');
+	          function projToGeom(projPoint) {
+	            var lat = geoMetersToLat(projPoint[1]);
+	            return [geoMetersToLon(projPoint[0], lat), lat];
+	          }
 
-	        // update
-	        groups = groups
-	            .merge(groupsEnter)
-	            .attr('opacity', function(d) { return d.direct === false ? '0.7' : null; })
-	            .attr('transform', turnTransform);
+	          var projEdgeNode1 = geomToProj(edgeNodes[0].loc);
+	          var projEdgeNode2 = geomToProj(edgeNodes[1].loc);
+	          var projectedAngle = geoVecAngle(projEdgeNode1, projEdgeNode2);
+	          var projectedCrossingLoc = geomToProj(crossingLoc);
+	          var linearToSphericalMetersRatio = geoVecLength(projEdgeNode1, projEdgeNode2) / geoSphericalDistance(edgeNodes[0].loc, edgeNodes[1].loc);
 
-	        groups.select('use')
-	            .attr('xlink:href', icon);
+	          function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
+	            var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
+	            return projToGeom([projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters, projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters]);
+	          }
 
-	        groups.select('rect');      // propagate bound data
-	        groups.select('circle');    // propagate bound data
+	          var endpointLocGetter1 = function endpointLocGetter1(lengthMeters) {
+	            return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
+	          };
 
+	          var endpointLocGetter2 = function endpointLocGetter2(lengthMeters) {
+	            return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
+	          }; // avoid creating very short edges from splitting too close to another node
 
-	        // Draw touch targets..
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        groups = touchLayer.selectAll('g.turn')
-	            .data(turns, function(d) { return d.key; });
 
-	        // exit
-	        groups.exit()
-	            .remove();
+	          var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary
 
-	        // enter
-	        groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'turn ' + d.key; });
+	          function determineEndpoint(edge, endNode, locGetter) {
+	            var newNode;
+	            var idealLengthMeters = structLengthMeters / 2; // distance between the crossing location and the end of the edge,
+	            // the maximum length of this side of the structure
 
-	        turnsEnter = groupsEnter
-	            .filter(function(d) { return !d.u; });
+	            var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
 
-	        turnsEnter.append('rect')
-	            .attr('class', 'target ' + fillClass)
-	            .attr('transform', 'translate(-22, -12)')
-	            .attr('width', '44')
-	            .attr('height', '24');
+	            if (crossingToEdgeEndDistance - idealLengthMeters > minEdgeLengthMeters) {
+	              // the edge is long enough to insert a new node
+	              // the loc that would result in the full expected length
+	              var idealNodeLoc = locGetter(idealLengthMeters);
+	              newNode = osmNode();
+	              graph = actionAddMidpoint({
+	                loc: idealNodeLoc,
+	                edge: edge
+	              }, newNode)(graph);
+	            } else {
+	              var edgeCount = 0;
+	              endNode.parentIntersectionWays(graph).forEach(function (way) {
+	                way.nodes.forEach(function (nodeID) {
+	                  if (nodeID === endNode.id) {
+	                    if (endNode.id === way.first() && endNode.id !== way.last() || endNode.id === way.last() && endNode.id !== way.first()) {
+	                      edgeCount += 1;
+	                    } else {
+	                      edgeCount += 2;
+	                    }
+	                  }
+	                });
+	              });
 
-	        uEnter = groupsEnter
-	            .filter(function(d) { return d.u; });
+	              if (edgeCount >= 3) {
+	                // the end node is a junction, try to leave a segment
+	                // between it and the structure - #7202
+	                var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
+
+	                if (insetLength > minEdgeLengthMeters) {
+	                  var insetNodeLoc = locGetter(insetLength);
+	                  newNode = osmNode();
+	                  graph = actionAddMidpoint({
+	                    loc: insetNodeLoc,
+	                    edge: edge
+	                  }, newNode)(graph);
+	                }
+	              }
+	            } // if the edge is too short to subdivide as desired, then
+	            // just bound the structure at the existing end node
 
-	        uEnter.append('circle')
-	            .attr('class', 'target ' + fillClass)
-	            .attr('r', '16');
 
-	        // update
-	        groups = groups
-	            .merge(groupsEnter)
-	            .attr('transform', turnTransform);
+	            if (!newNode) newNode = endNode;
+	            var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
+	            // do the split
 
-	        groups.select('rect');      // propagate bound data
-	        groups.select('circle');    // propagate bound data
+	            graph = splitAction(graph);
 
+	            if (splitAction.getCreatedWayIDs().length) {
+	              resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
+	            }
 
-	        return this;
-	    }
+	            return newNode;
+	          }
 
-	    return drawTurns;
-	}
+	          var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
+	          var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
+	          var structureWay = resultWayIDs.map(function (id) {
+	            return graph.entity(id);
+	          }).find(function (way) {
+	            return way.nodes.indexOf(structEndNode1.id) !== -1 && way.nodes.indexOf(structEndNode2.id) !== -1;
+	          });
+	          var tags = Object.assign({}, structureWay.tags); // copy tags
 
-	function svgVertices(projection, context) {
-	    var radiuses = {
-	        //       z16-, z17,   z18+,  w/icon
-	        shadow: [6,    7.5,   7.5,   12],
-	        stroke: [2.5,  3.5,   3.5,   8],
-	        fill:   [1,    1.5,   1.5,   1.5]
-	    };
+	          if (bridgeOrTunnel === 'bridge') {
+	            tags.bridge = 'yes';
+	            tags.layer = '1';
+	          } else {
+	            var tunnelValue = 'yes';
 
-	    var _currHoverTarget;
-	    var _currPersistent = {};
-	    var _currHover = {};
-	    var _prevHover = {};
-	    var _currSelected = {};
-	    var _prevSelected = {};
-	    var _radii = {};
+	            if (getFeatureType(structureWay, graph) === 'waterway') {
+	              // use `tunnel=culvert` for waterways by default
+	              tunnelValue = 'culvert';
+	            }
 
+	            tags.tunnel = tunnelValue;
+	            tags.layer = '-1';
+	          } // apply the structure tags to the way
 
-	    function sortY(a, b) {
-	        return b.loc[1] - a.loc[1];
-	    }
 
-	    // Avoid exit/enter if we're just moving stuff around.
-	    // The node will get a new version but we only need to run the update selection.
-	    function fastEntityKey(d) {
-	        var mode = context.mode();
-	        var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-	        return isMoving ? d.id : osmEntity.key(d);
-	    }
+	          graph = actionChangeTags(structureWay.id, tags)(graph);
+	          return graph;
+	        };
 
+	        context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
+	        context.enter(modeSelect(context, resultWayIDs));
+	      }
+	    });
+	  }
 
-	    function draw(selection, graph, vertices, sets, filter) {
-	        sets = sets || { selected: {}, important: {}, hovered: {} };
+	  function makeConnectWaysFix(connectionTags) {
+	    var fixTitleID = 'connect_features';
 
-	        var icons = {};
-	        var directions = {};
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
-	        var z = (zoom < 17 ? 0 : zoom < 18 ? 1 : 2);
-	        var activeID = context.activeID();
-	        var base = context.history().base();
+	    if (connectionTags.ford) {
+	      fixTitleID = 'connect_using_ford';
+	    }
 
+	    return new validationIssueFix({
+	      icon: 'iD-icon-crossing',
+	      title: _t.html('issues.fix.' + fixTitleID + '.title'),
+	      onClick: function onClick(context) {
+	        var loc = this.issue.loc;
+	        var connectionTags = this.issue.data.connectionTags;
+	        var edges = this.issue.data.edges;
+	        context.perform(function actionConnectCrossingWays(graph) {
+	          // create the new node for the points
+	          var node = osmNode({
+	            loc: loc,
+	            tags: connectionTags
+	          });
+	          graph = graph.replace(node);
+	          var nodesToMerge = [node.id];
+	          var mergeThresholdInMeters = 0.75;
+	          edges.forEach(function (edge) {
+	            var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+	            var closestNodeInfo = geoSphericalClosestNode(edgeNodes, loc); // if there is already a point nearby, use that
+
+	            if (closestNodeInfo.distance < mergeThresholdInMeters) {
+	              nodesToMerge.push(closestNodeInfo.node.id); // else add the new node to the way
+	            } else {
+	              graph = actionAddMidpoint({
+	                loc: loc,
+	                edge: edge
+	              }, node)(graph);
+	            }
+	          });
 
-	        function getIcon(d) {
-	            // always check latest entity, as fastEntityKey avoids enter/exit now
-	            var entity = graph.entity(d.id);
-	            if (entity.id in icons) { return icons[entity.id]; }
+	          if (nodesToMerge.length > 1) {
+	            // if we're using nearby nodes, merge them with the new node
+	            graph = actionMergeNodes(nodesToMerge, loc)(graph);
+	          }
 
-	            icons[entity.id] =
-	                entity.hasInterestingTags() &&
-	                _mainPresetIndex.match(entity, graph).icon;
+	          return graph;
+	        }, _t('issues.fix.connect_crossing_features.annotation'));
+	      }
+	    });
+	  }
 
-	            return icons[entity.id];
+	  function makeChangeLayerFix(higherOrLower) {
+	    return new validationIssueFix({
+	      icon: 'iD-icon-' + (higherOrLower === 'higher' ? 'up' : 'down'),
+	      title: _t.html('issues.fix.tag_this_as_' + higherOrLower + '.title'),
+	      onClick: function onClick(context) {
+	        var mode = context.mode();
+	        if (!mode || mode.id !== 'select') return;
+	        var selectedIDs = mode.selectedIDs();
+	        if (selectedIDs.length !== 1) return;
+	        var selectedID = selectedIDs[0];
+	        if (!this.issue.entityIds.some(function (entityId) {
+	          return entityId === selectedID;
+	        })) return;
+	        var entity = context.hasEntity(selectedID);
+	        if (!entity) return;
+	        var tags = Object.assign({}, entity.tags); // shallow copy
+
+	        var layer = tags.layer && Number(tags.layer);
+
+	        if (layer && !isNaN(layer)) {
+	          if (higherOrLower === 'higher') {
+	            layer += 1;
+	          } else {
+	            layer -= 1;
+	          }
+	        } else {
+	          if (higherOrLower === 'higher') {
+	            layer = 1;
+	          } else {
+	            layer = -1;
+	          }
 	        }
 
+	        tags.layer = layer.toString();
+	        context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
+	      }
+	    });
+	  }
 
-	        // memoize directions results, return false for empty arrays (for use in filter)
-	        function getDirections(entity) {
-	            if (entity.id in directions) { return directions[entity.id]; }
-
-	            var angles = entity.directions(graph, projection);
-	            directions[entity.id] = angles.length ? angles : false;
-	            return angles;
-	        }
+	  validation.type = type;
+	  return validation;
+	}
 
+	function validationDisconnectedWay() {
+	  var type = 'disconnected_way';
 
-	        function updateAttributes(selection) {
-	            ['shadow', 'stroke', 'fill'].forEach(function(klass) {
-	                var rads = radiuses[klass];
-	                selection.selectAll('.' + klass)
-	                    .each(function(entity) {
-	                        var i = z && getIcon(entity);
-	                        var r = rads[i ? 3 : z];
+	  function isTaggedAsHighway(entity) {
+	    return osmRoutableHighwayTagValues[entity.tags.highway];
+	  }
 
-	                        // slightly increase the size of unconnected endpoints #3775
-	                        if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
-	                            r += 1.5;
-	                        }
+	  var validation = function checkDisconnectedWay(entity, graph) {
+	    var routingIslandWays = routingIslandForEntity(entity);
+	    if (!routingIslandWays) return [];
+	    return [new validationIssue({
+	      type: type,
+	      subtype: 'highway',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = this.entityIds.length && context.hasEntity(this.entityIds[0]);
+	        var label = entity && utilDisplayLabel(entity, context.graph());
+	        return _t.html('issues.disconnected_way.routable.message', {
+	          count: this.entityIds.length,
+	          highway: label
+	        });
+	      },
+	      reference: showReference,
+	      entityIds: Array.from(routingIslandWays).map(function (way) {
+	        return way.id;
+	      }),
+	      dynamicFixes: makeFixes
+	    })];
 
-	                        if (klass === 'shadow') {   // remember this value, so we don't need to
-	                            _radii[entity.id] = r;  // recompute it when we draw the touch targets
-	                        }
+	    function makeFixes(context) {
+	      var fixes = [];
+	      var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
 
-	                        select(this)
-	                            .attr('r', r)
-	                            .attr('visibility', (i && klass === 'fill') ? 'hidden' : null);
-	                    });
-	            });
+	      if (singleEntity) {
+	        if (singleEntity.type === 'way' && !singleEntity.isClosed()) {
+	          var textDirection = _mainLocalizer.textDirection();
+	          var startFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.first(), 'start');
+	          if (startFix) fixes.push(startFix);
+	          var endFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.last(), 'end');
+	          if (endFix) fixes.push(endFix);
 	        }
 
-	        vertices.sort(sortY);
-
-	        var groups = selection.selectAll('g.vertex')
-	            .filter(filter)
-	            .data(vertices, fastEntityKey);
-
-	        // exit
-	        groups.exit()
-	            .remove();
-
-	        // enter
-	        var enter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'node vertex ' + d.id; })
-	            .order();
-
-	        enter
-	            .append('circle')
-	            .attr('class', 'shadow');
-
-	        enter
-	            .append('circle')
-	            .attr('class', 'stroke');
-
-	        // Vertices with tags get a fill.
-	        enter.filter(function(d) { return d.hasInterestingTags(); })
-	            .append('circle')
-	            .attr('class', 'fill');
-
-	        // update
-	        groups = groups
-	            .merge(enter)
-	            .attr('transform', svgPointTransform(projection))
-	            .classed('sibling', function(d) { return d.id in sets.selected; })
-	            .classed('shared', function(d) { return graph.isShared(d); })
-	            .classed('endpoint', function(d) { return d.isEndpoint(graph); })
-	            .classed('added', function(d) {
-	                return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
-	            })
-	            .classed('moved', function(d) {
-	                return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
-	            })
-	            .classed('retagged', function(d) {
-	                return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-	            })
-	            .call(updateAttributes);
-
-	        // Vertices with icons get a `use`.
-	        var iconUse = groups
-	            .selectAll('.icon')
-	            .data(function data(d) { return zoom >= 17 && getIcon(d) ? [d] : []; }, fastEntityKey);
-
-	        // exit
-	        iconUse.exit()
-	            .remove();
-
-	        // enter
-	        iconUse.enter()
-	            .append('use')
-	            .attr('class', 'icon')
-	            .attr('width', '11px')
-	            .attr('height', '11px')
-	            .attr('transform', 'translate(-5.5, -5.5)')
-	            .attr('xlink:href', function(d) {
-	                var picon = getIcon(d);
-	                var isMaki = /^maki-/.test(picon);
-	                return '#' + picon + (isMaki ? '-11' : '');
-	            });
-
-
-	        // Vertices with directions get viewfields
-	        var dgroups = groups
-	            .selectAll('.viewfieldgroup')
-	            .data(function data(d) { return zoom >= 18 && getDirections(d) ? [d] : []; }, fastEntityKey);
-
-	        // exit
-	        dgroups.exit()
-	            .remove();
-
-	        // enter/update
-	        dgroups = dgroups.enter()
-	            .insert('g', '.shadow')
-	            .attr('class', 'viewfieldgroup')
-	            .merge(dgroups);
-
-	        var viewfields = dgroups.selectAll('.viewfield')
-	            .data(getDirections, function key(d) { return osmEntity.key(d); });
-
-	        // exit
-	        viewfields.exit()
-	            .remove();
-
-	        // enter/update
-	        viewfields.enter()
-	            .append('path')
-	            .attr('class', 'viewfield')
-	            .attr('d', 'M0,0H0')
-	            .merge(viewfields)
-	            .attr('marker-start', 'url(#ideditor-viewfield-marker' + (wireframe ? '-wireframe' : '') + ')')
-	            .attr('transform', function(d) { return 'rotate(' + d + ')'; });
-	    }
-
-
-	    function drawTargets(selection, graph, entities, filter) {
-	        var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-	        var getTransform = svgPointTransform(projection).geojson;
-	        var activeID = context.activeID();
-	        var data = { targets: [], nopes: [] };
-
-	        entities.forEach(function(node) {
-	            if (activeID === node.id) { return; }   // draw no target on the activeID
-
-	            var vertexType = svgPassiveVertex(node, graph, activeID);
-	            if (vertexType !== 0) {     // passive or adjacent - allow to connect
-	                data.targets.push({
-	                    type: 'Feature',
-	                    id: node.id,
-	                    properties: {
-	                        target: true,
-	                        entity: node
-	                    },
-	                    geometry: node.asGeoJSON()
-	                });
-	            } else {
-	                data.nopes.push({
-	                    type: 'Feature',
-	                    id: node.id + '-nope',
-	                    properties: {
-	                        nope: true,
-	                        target: true,
-	                        entity: node
-	                    },
-	                    geometry: node.asGeoJSON()
-	                });
-	            }
-	        });
-
-	        // Targets allow hover and vertex snapping
-	        var targets = selection.selectAll('.vertex.target-allowed')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data.targets, function key(d) { return d.id; });
-
-	        // exit
-	        targets.exit()
-	            .remove();
-
-	        // enter/update
-	        targets.enter()
-	            .append('circle')
-	            .attr('r', function(d) {
-	                return _radii[d.id]
-	                  || radiuses.shadow[3];
-	            })
-	            .merge(targets)
-	            .attr('class', function(d) {
-	                return 'node vertex target target-allowed '
-	                + targetClass + d.id;
-	            })
-	            .attr('transform', getTransform);
-
-
-	        // NOPE
-	        var nopes = selection.selectAll('.vertex.target-nope')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data.nopes, function key(d) { return d.id; });
-
-	        // exit
-	        nopes.exit()
-	            .remove();
-
-	        // enter/update
-	        nopes.enter()
-	            .append('circle')
-	            .attr('r', function(d) { return (_radii[d.properties.entity.id] || radiuses.shadow[3]); })
-	            .merge(nopes)
-	            .attr('class', function(d) { return 'node vertex target target-nope ' + nopeClass + d.id; })
-	            .attr('transform', getTransform);
-	    }
-
-
-	    // Points can also render as vertices:
-	    // 1. in wireframe mode or
-	    // 2. at higher zooms if they have a direction
-	    function renderAsVertex(entity, graph, wireframe, zoom) {
-	        var geometry = entity.geometry(graph);
-	        return geometry === 'vertex' || (geometry === 'point' && (
-	            wireframe || (zoom >= 18 && entity.directions(graph, projection).length)
-	        ));
-	    }
-
-
-	    function isEditedNode(node, base, head) {
-	        var baseNode = base.entities[node.id];
-	        var headNode = head.entities[node.id];
-	        return !headNode ||
-	            !baseNode ||
-	            !fastDeepEqual(headNode.tags, baseNode.tags) ||
-	            !fastDeepEqual(headNode.loc, baseNode.loc);
-	    }
-
-
-	    function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
-	        var results = {};
-
-	        var seenIds = {};
-
-	        function addChildVertices(entity) {
-
-	            // avoid redunant work and infinite recursion of circular relations
-	            if (seenIds[entity.id]) { return; }
-	            seenIds[entity.id] = true;
-
-	            var geometry = entity.geometry(graph);
-	            if (!context.features().isHiddenFeature(entity, graph, geometry)) {
-	                var i;
-	                if (entity.type === 'way') {
-	                    for (i = 0; i < entity.nodes.length; i++) {
-	                        var child = graph.hasEntity(entity.nodes[i]);
-	                        if (child) {
-	                            addChildVertices(child);
-	                        }
-	                    }
-	                } else if (entity.type === 'relation') {
-	                    for (i = 0; i < entity.members.length; i++) {
-	                        var member = graph.hasEntity(entity.members[i].id);
-	                        if (member) {
-	                            addChildVertices(member);
-	                        }
-	                    }
-	                } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
-	                    results[entity.id] = entity;
-	                }
-	            }
+	        if (!fixes.length) {
+	          fixes.push(new validationIssueFix({
+	            title: _t.html('issues.fix.connect_feature.title')
+	          }));
 	        }
 
-	        ids.forEach(function(id) {
-	            var entity = graph.hasEntity(id);
-	            if (!entity) { return; }
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.delete_feature.title'),
+	          entityIds: [singleEntity.id],
+	          onClick: function onClick(context) {
+	            var id = this.issue.entityIds[0];
+	            var operation = operationDelete(context, [id]);
 
-	            if (entity.type === 'node') {
-	                if (renderAsVertex(entity, graph, wireframe, zoom)) {
-	                    results[entity.id] = entity;
-	                    graph.parentWays(entity).forEach(function(entity) {
-	                        addChildVertices(entity);
-	                    });
-	                }
-	            } else {  // way, relation
-	                addChildVertices(entity);
+	            if (!operation.disabled()) {
+	              operation();
 	            }
-	        });
+	          }
+	        }));
+	      } else {
+	        fixes.push(new validationIssueFix({
+	          title: _t.html('issues.fix.connect_features.title')
+	        }));
+	      }
 
-	        return results;
+	      return fixes;
 	    }
 
-
-	    function drawVertices(selection, graph, entities, filter, extent, fullRedraw) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var visualDiff = context.surface().classed('highlight-edited');
-	        var zoom = geoScaleToZoom(projection.scale());
-	        var mode = context.mode();
-	        var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-	        var base = context.history().base();
-
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.vertices');
-	        var touchLayer = selection.selectAll('.layer-touch.points');
-
-	        if (fullRedraw) {
-	            _currPersistent = {};
-	            _radii = {};
-	        }
-
-	        // Collect important vertices from the `entities` list..
-	        // (during a paritial redraw, it will not contain everything)
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            var geometry = entity.geometry(graph);
-	            var keep = false;
-
-	            // a point that looks like a vertex..
-	            if ((geometry === 'point') && renderAsVertex(entity, graph, wireframe, zoom)) {
-	                _currPersistent[entity.id] = entity;
-	                keep = true;
-
-	            // a vertex of some importance..
-	            } else if (geometry === 'vertex' &&
-	                (entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph)
-	                || (visualDiff && isEditedNode(entity, base, graph)))) {
-	                _currPersistent[entity.id] = entity;
-	                keep = true;
-	            }
-
-	            // whatever this is, it's not a persistent vertex..
-	            if (!keep && !fullRedraw) {
-	                delete _currPersistent[entity.id];
-	            }
-	        }
-
-	        // 3 sets of vertices to consider:
-	        var sets = {
-	            persistent: _currPersistent,  // persistent = important vertices (render always)
-	            selected: _currSelected,      // selected + siblings of selected (render always)
-	            hovered: _currHover           // hovered + siblings of hovered (render only in draw modes)
-	        };
-
-	        var all = Object.assign({}, (isMoving ? _currHover : {}), _currSelected, _currPersistent);
-
-	        // Draw the vertices..
-	        // The filter function controls the scope of what objects d3 will touch (exit/enter/update)
-	        // Adjust the filter function to expand the scope beyond whatever entities were passed in.
-	        var filterRendered = function(d) {
-	            return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
-	        };
-	        drawLayer
-	            .call(draw, graph, currentVisible(all), sets, filterRendered);
-
-	        // Draw touch targets..
-	        // When drawing, render all targets (not just those affected by a partial redraw)
-	        var filterTouch = function(d) {
-	            return isMoving ? true : filterRendered(d);
-	        };
-	        touchLayer
-	            .call(drawTargets, graph, currentVisible(all), filterTouch);
-
-
-	        function currentVisible(which) {
-	            return Object.keys(which)
-	                .map(graph.hasEntity, graph)     // the current version of this entity
-	                .filter(function (entity) { return entity && entity.intersects(extent, graph); });
-	        }
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.disconnected_way.routable.reference'));
 	    }
 
+	    function routingIslandForEntity(entity) {
+	      var routingIsland = new Set(); // the interconnected routable features
 
-	    // partial redraw - only update the selected items..
-	    drawVertices.drawSelected = function(selection, graph, extent) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
-
-	        _prevSelected = _currSelected || {};
-	        if (context.map().isInWideSelection()) {
-	            _currSelected = {};
-	            context.selectedIDs().forEach(function(id) {
-	                var entity = graph.hasEntity(id);
-	                if (!entity) { return; }
-
-	                if (entity.type === 'node') {
-	                    if (renderAsVertex(entity, graph, wireframe, zoom)) {
-	                        _currSelected[entity.id] = entity;
-	                    }
-	                }
-	            });
+	      var waysToCheck = []; // the queue of remaining routable ways to traverse
 
-	        } else {
-	            _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
-	        }
+	      function queueParentWays(node) {
+	        graph.parentWays(node).forEach(function (parentWay) {
+	          if (!routingIsland.has(parentWay) && // only check each feature once
+	          isRoutableWay(parentWay, false)) {
+	            // only check routable features
+	            routingIsland.add(parentWay);
+	            waysToCheck.push(parentWay);
+	          }
+	        });
+	      }
 
-	        // note that drawVertices will add `_currSelected` automatically if needed..
-	        var filter = function(d) { return d.id in _prevSelected; };
-	        drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
-	    };
+	      if (entity.type === 'way' && isRoutableWay(entity, true)) {
+	        routingIsland.add(entity);
+	        waysToCheck.push(entity);
+	      } else if (entity.type === 'node' && isRoutableNode(entity)) {
+	        routingIsland.add(entity);
+	        queueParentWays(entity);
+	      } else {
+	        // this feature isn't routable, cannot be a routing island
+	        return null;
+	      }
 
+	      while (waysToCheck.length) {
+	        var wayToCheck = waysToCheck.pop();
+	        var childNodes = graph.childNodes(wayToCheck);
 
-	    // partial redraw - only update the hovered items..
-	    drawVertices.drawHover = function(selection, graph, target, extent) {
-	        if (target === _currHoverTarget) { return; }  // continue only if something changed
+	        for (var i in childNodes) {
+	          var vertex = childNodes[i];
 
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
+	          if (isConnectedVertex(vertex)) {
+	            // found a link to the wider network, not a routing island
+	            return null;
+	          }
 
-	        _prevHover = _currHover || {};
-	        _currHoverTarget = target;
-	        var entity = target && target.properties && target.properties.entity;
+	          if (isRoutableNode(vertex)) {
+	            routingIsland.add(vertex);
+	          }
 
-	        if (entity) {
-	            _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
-	        } else {
-	            _currHover = {};
+	          queueParentWays(vertex);
 	        }
+	      } // no network link found, this is a routing island, return its members
 
-	        // note that drawVertices will add `_currHover` automatically if needed..
-	        var filter = function(d) { return d.id in _prevHover; };
-	        drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
-	    };
-
-	    return drawVertices;
-	}
 
-	function utilBindOnce(target, type, listener, capture) {
-	    var typeOnce = type + '.once';
-	    function one() {
-	        target.on(typeOnce, null);
-	        listener.apply(this, arguments);
+	      return routingIsland;
 	    }
-	    target.on(typeOnce, one, capture);
-	    return this;
-	}
-
-	// Adapted from d3-zoom to handle pointer events.
 
-	// Ignore right-click, since that should open the context menu.
-	function defaultFilter$2() {
-	  return !event.ctrlKey && !event.button;
-	}
+	    function isConnectedVertex(vertex) {
+	      // assume ways overlapping unloaded tiles are connected to the wider road network  - #5938
+	      var osm = services.osm;
+	      if (osm && !osm.isDataLoaded(vertex.loc)) return true; // entrances are considered connected
 
-	function defaultExtent$1() {
-	  var e = this;
-	  if (e instanceof SVGElement) {
-	    e = e.ownerSVGElement || e;
-	    if (e.hasAttribute('viewBox')) {
-	      e = e.viewBox.baseVal;
-	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+	      if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
+	      if (vertex.tags.amenity === 'parking_entrance') return true;
+	      return false;
 	    }
-	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
-	  }
-	  return [[0, 0], [e.clientWidth, e.clientHeight]];
-	}
 
-	function defaultWheelDelta$1() {
-	  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002);
-	}
+	    function isRoutableNode(node) {
+	      // treat elevators as distinct features in the highway network
+	      if (node.tags.highway === 'elevator') return true;
+	      return false;
+	    }
 
-	function defaultConstrain$1(transform, extent, translateExtent) {
-	  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
-	      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
-	      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
-	      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
-	  return transform.translate(
-	    dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
-	    dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
-	  );
-	}
+	    function isRoutableWay(way, ignoreInnerWays) {
+	      if (isTaggedAsHighway(way) || way.tags.route === 'ferry') return true;
+	      return graph.parentRelations(way).some(function (parentRelation) {
+	        if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true;
+	        if (parentRelation.isMultipolygon() && isTaggedAsHighway(parentRelation) && (!ignoreInnerWays || parentRelation.memberById(way.id).role !== 'inner')) return true;
+	        return false;
+	      });
+	    }
 
-	function utilZoomPan() {
-	  var filter = defaultFilter$2,
-	      extent = defaultExtent$1,
-	      constrain = defaultConstrain$1,
-	      wheelDelta = defaultWheelDelta$1,
-	      scaleExtent = [0, Infinity],
-	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
-	      interpolate = interpolateZoom,
-	      listeners = dispatch('start', 'zoom', 'end'),
-	      _wheelDelay = 150,
-	      _transform = identity$2,
-	      _activeGesture;
+	    function makeContinueDrawingFixIfAllowed(textDirection, vertexID, whichEnd) {
+	      var vertex = graph.hasEntity(vertexID);
+	      if (!vertex || vertex.tags.noexit === 'yes') return null;
+	      var useLeftContinue = whichEnd === 'start' && textDirection === 'ltr' || whichEnd === 'end' && textDirection === 'rtl';
+	      return new validationIssueFix({
+	        icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
+	        title: _t.html('issues.fix.continue_from_' + whichEnd + '.title'),
+	        entityIds: [vertexID],
+	        onClick: function onClick(context) {
+	          var wayId = this.issue.entityIds[0];
+	          var way = context.hasEntity(wayId);
+	          var vertexId = this.entityIds[0];
+	          var vertex = context.hasEntity(vertexId);
+	          if (!way || !vertex) return; // make sure the vertex is actually visible and editable
 
-	  function zoom(selection) {
-	    selection
-	        .on('pointerdown.zoom', pointerdown)
-	        .on('wheel.zoom', wheeled)
-	        .style('touch-action', 'none')
-	        .style('-webkit-tap-highlight-color', 'rgba(0,0,0,0)');
+	          var map = context.map();
 
-	    select(window)
-	        .on('pointermove.zoompan', pointermove)
-	        .on('pointerup.zoompan pointercancel.zoompan', pointerup);
-	  }
+	          if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+	            map.zoomToEase(vertex);
+	          }
 
-	  zoom.transform = function(collection, transform, point) {
-	    var selection = collection.selection ? collection.selection() : collection;
-	    if (collection !== selection) {
-	      schedule(collection, transform, point);
-	    } else {
-	      selection.interrupt().each(function() {
-	        gesture(this, arguments)
-	            .start()
-	            .zoom(null, typeof transform === 'function' ? transform.apply(this, arguments) : transform)
-	            .end();
+	          context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
+	        }
 	      });
-	    }
-	  };
-
-	  zoom.scaleBy = function(selection, k, p) {
-	    zoom.scaleTo(selection, function() {
-	      var k0 = _transform.k,
-	          k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
-	      return k0 * k1;
-	    }, p);
+	    }
 	  };
 
-	  zoom.scaleTo = function(selection, k, p) {
-	    zoom.transform(selection, function() {
-	      var e = extent.apply(this, arguments),
-	          t0 = _transform,
-	          p0 = p == null ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p,
-	          p1 = t0.invert(p0),
-	          k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
-	      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
-	    }, p);
-	  };
+	  validation.type = type;
+	  return validation;
+	}
 
-	  zoom.translateBy = function(selection, x, y) {
-	    zoom.transform(selection, function() {
-	      return constrain(_transform.translate(
-	        typeof x === 'function' ? x.apply(this, arguments) : x,
-	        typeof y === 'function' ? y.apply(this, arguments) : y
-	      ), extent.apply(this, arguments), translateExtent);
-	    });
-	  };
+	function validationFormatting() {
+	  var type = 'invalid_format';
 
-	  zoom.translateTo = function(selection, x, y, p) {
-	    zoom.transform(selection, function() {
-	      var e = extent.apply(this, arguments),
-	          t = _transform,
-	          p0 = p == null ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p;
-	      return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(
-	        typeof x === 'function' ? -x.apply(this, arguments) : -x,
-	        typeof y === 'function' ? -y.apply(this, arguments) : -y
-	      ), e, translateExtent);
-	    }, p);
-	  };
+	  var validation = function validation(entity) {
+	    var issues = [];
 
-	  function scale(transform, k) {
-	    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
-	    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
-	  }
+	    function isValidEmail(email) {
+	      // Emails in OSM are going to be official so they should be pretty simple
+	      // Using negated lists to better support all possible unicode characters (#6494)
+	      var valid_email = /^[^\(\)\\,":;<>@\[\]]+@[^\(\)\\,":;<>@\[\]\.]+(?:\.[a-z0-9-]+)*$/i; // An empty value is also acceptable
 
-	  function translate(transform, p0, p1) {
-	    var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
-	    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
-	  }
+	      return !email || valid_email.test(email);
+	    }
+	    /*
+	    function isSchemePresent(url) {
+	        var valid_scheme = /^https?:\/\//i;
+	        return (!url || valid_scheme.test(url));
+	    }
+	    */
 
-	  function centroid(extent) {
-	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
-	  }
 
-	  function schedule(transition, transform, point) {
-	    transition
-	        .on('start.zoom', function() { gesture(this, arguments).start(); })
-	        .on('interrupt.zoom end.zoom', function() { gesture(this, arguments).end(); })
-	        .tween('zoom', function() {
-	          var that = this,
-	              args = arguments,
-	              g = gesture(that, args),
-	              e = extent.apply(that, args),
-	              p = point == null ? centroid(e) : typeof point === 'function' ? point.apply(that, args) : point,
-	              w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
-	              a = _transform,
-	              b = typeof transform === 'function' ? transform.apply(that, args) : transform,
-	              i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
-	          return function(t) {
-	            if (t === 1) { t = b; } // Avoid rounding error on end.
-	            else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
-	            g.zoom(null, t);
-	          };
-	        });
-	  }
+	    function showReferenceEmail(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.invalid_format.email.reference'));
+	    }
+	    /*
+	    function showReferenceWebsite(selection) {
+	        selection.selectAll('.issue-reference')
+	            .data([0])
+	            .enter()
+	            .append('div')
+	            .attr('class', 'issue-reference')
+	            .html(t.html('issues.invalid_format.website.reference'));
+	    }
+	     if (entity.tags.website) {
+	        // Multiple websites are possible
+	        // If ever we support ES6, arrow functions make this nicer
+	        var websites = entity.tags.website
+	            .split(';')
+	            .map(function(s) { return s.trim(); })
+	            .filter(function(x) { return !isSchemePresent(x); });
+	         if (websites.length) {
+	            issues.push(new validationIssue({
+	                type: type,
+	                subtype: 'website',
+	                severity: 'warning',
+	                message: function(context) {
+	                    var entity = context.hasEntity(this.entityIds[0]);
+	                    return entity ? t.html('issues.invalid_format.website.message' + this.data,
+	                        { feature: utilDisplayLabel(entity, context.graph()), site: websites.join(', ') }) : '';
+	                },
+	                reference: showReferenceWebsite,
+	                entityIds: [entity.id],
+	                hash: websites.join(),
+	                data: (websites.length > 1) ? '_multi' : ''
+	            }));
+	        }
+	    }
+	    */
 
-	  function gesture(that, args, clean) {
-	    return (!clean && _activeGesture) || new Gesture(that, args);
-	  }
 
-	  function Gesture(that, args) {
-	    this.that = that;
-	    this.args = args;
-	    this.active = 0;
-	    this.extent = extent.apply(that, args);
-	  }
+	    if (entity.tags.email) {
+	      // Multiple emails are possible
+	      var emails = entity.tags.email.split(';').map(function (s) {
+	        return s.trim();
+	      }).filter(function (x) {
+	        return !isValidEmail(x);
+	      });
 
-	  Gesture.prototype = {
-	    start: function() {
-	      if (++this.active === 1) {
-	        _activeGesture = this;
-	        this.emit('start');
-	      }
-	      return this;
-	    },
-	    zoom: function(key, transform) {
-	      if (this.mouse && key !== 'mouse') { this.mouse[1] = transform.invert(this.mouse[0]); }
-	      if (this.pointer0 && key !== 'touch') { this.pointer0[1] = transform.invert(this.pointer0[0]); }
-	      if (this.pointer1 && key !== 'touch') { this.pointer1[1] = transform.invert(this.pointer1[0]); }
-	      _transform = transform;
-	      this.emit('zoom');
-	      return this;
-	    },
-	    end: function() {
-	      if (--this.active === 0) {
-	        _activeGesture = null;
-	        this.emit('end');
+	      if (emails.length) {
+	        issues.push(new validationIssue({
+	          type: type,
+	          subtype: 'email',
+	          severity: 'warning',
+	          message: function message(context) {
+	            var entity = context.hasEntity(this.entityIds[0]);
+	            return entity ? _t.html('issues.invalid_format.email.message' + this.data, {
+	              feature: utilDisplayLabel(entity, context.graph()),
+	              email: emails.join(', ')
+	            }) : '';
+	          },
+	          reference: showReferenceEmail,
+	          entityIds: [entity.id],
+	          hash: emails.join(),
+	          data: emails.length > 1 ? '_multi' : ''
+	        }));
 	      }
-	      return this;
-	    },
-	    emit: function(type) {
-	      customEvent(new ZoomEvent(zoom, type, _transform), listeners.apply, listeners, [type, this.that, this.args]);
 	    }
+
+	    return issues;
 	  };
 
-	  function wheeled() {
-	    if (!filter.apply(this, arguments)) { return; }
-	    var g = gesture(this, arguments),
-	        t = _transform,
-	        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
-	        p = utilFastMouse(this)(event);
+	  validation.type = type;
+	  return validation;
+	}
 
-	    // If the mouse is in the same location as before, reuse it.
-	    // If there were recent wheel events, reset the wheel idle timeout.
-	    if (g.wheel) {
-	      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
-	        g.mouse[1] = t.invert(g.mouse[0] = p);
-	      }
-	      clearTimeout(g.wheel);
+	function validationHelpRequest(context) {
+	  var type = 'help_request';
 
-	    // Otherwise, capture the mouse point and location at the start.
-	    } else {
-	      g.mouse = [p, t.invert(p)];
-	      interrupt(this);
-	      g.start();
-	    }
+	  var validation = function checkFixmeTag(entity) {
+	    if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user
 
-	    event.preventDefault();
-	    event.stopImmediatePropagation();
-	    g.wheel = setTimeout(wheelidled, _wheelDelay);
-	    g.zoom('mouse', constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+	    if (entity.version === undefined) return [];
 
-	    function wheelidled() {
-	      g.wheel = null;
-	      g.end();
+	    if (entity.v !== undefined) {
+	      var baseEntity = context.history().base().hasEntity(entity.id); // don't flag fixmes added by the user on existing features
+
+	      if (!baseEntity || !baseEntity.tags.fixme) return [];
 	    }
-	  }
 
-	  var _downPointerIDs = new Set();
-	  var _pointerLocGetter;
+	    return [new validationIssue({
+	      type: type,
+	      subtype: 'fixme_tag',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.fixme_tag.message', {
+	          feature: utilDisplayLabel(entity, context.graph())
+	        }) : '';
+	      },
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          title: _t.html('issues.fix.address_the_concern.title')
+	        })];
+	      },
+	      reference: showReference,
+	      entityIds: [entity.id]
+	    })];
 
-	  function pointerdown() {
-	    _downPointerIDs.add(event.pointerId);
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.fixme_tag.reference'));
+	    }
+	  };
 
-	    if (!filter.apply(this, arguments)) { return; }
+	  validation.type = type;
+	  return validation;
+	}
 
-	    var g = gesture(this, arguments, _downPointerIDs.size === 1);
-	    var started;
+	function validationImpossibleOneway() {
+	  var type = 'impossible_oneway';
+
+	  var validation = function checkImpossibleOneway(entity, graph) {
+	    if (entity.type !== 'way' || entity.geometry(graph) !== 'line') return [];
+	    if (entity.isClosed()) return [];
+	    if (!typeForWay(entity)) return [];
+	    if (!isOneway(entity)) return [];
+	    var firstIssues = issuesForNode(entity, entity.first());
+	    var lastIssues = issuesForNode(entity, entity.last());
+	    return firstIssues.concat(lastIssues);
+
+	    function typeForWay(way) {
+	      if (way.geometry(graph) !== 'line') return null;
+	      if (osmRoutableHighwayTagValues[way.tags.highway]) return 'highway';
+	      if (osmFlowingWaterwayTagValues[way.tags.waterway]) return 'waterway';
+	      return null;
+	    }
 
-	    event.stopImmediatePropagation();
-	    _pointerLocGetter = utilFastMouse(this);
-	    var loc = _pointerLocGetter(event);
-	    var p = [loc, _transform.invert(loc), event.pointerId];
-	    if (!g.pointer0) {
-	       g.pointer0 = p;
-	       started = true;
+	    function isOneway(way) {
+	      if (way.tags.oneway === 'yes') return true;
+	      if (way.tags.oneway) return false;
 
-	    } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
-	       g.pointer1 = p;
-	    }
+	      for (var key in way.tags) {
+	        if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
+	          return true;
+	        }
+	      }
 
-	    if (started) {
-	      interrupt(this);
-	      g.start();
+	      return false;
 	    }
-	  }
 
-	  function pointermove() {
-	    if (!_downPointerIDs.has(event.pointerId)) { return; }
+	    function nodeOccursMoreThanOnce(way, nodeID) {
+	      var occurrences = 0;
 
-	    if (!_activeGesture || !_pointerLocGetter) { return; }
+	      for (var index in way.nodes) {
+	        if (way.nodes[index] === nodeID) {
+	          occurrences += 1;
+	          if (occurrences > 1) return true;
+	        }
+	      }
 
-	    var g = gesture(this, arguments);
+	      return false;
+	    }
 
-	    var isPointer0 = g.pointer0 && g.pointer0[2] === event.pointerId;
-	    var isPointer1 = !isPointer0 && g.pointer1 && g.pointer1[2] === event.pointerId;
+	    function isConnectedViaOtherTypes(way, node) {
+	      var wayType = typeForWay(way);
 
-	    if ((isPointer0 || isPointer1) && 'buttons' in event && !event.buttons) {
-	      // The pointer went up without ending the gesture somehow, e.g.
-	      // a down mouse was moved off the map and released. End it here.
-	      if (g.pointer0) { _downPointerIDs.delete(g.pointer0[2]); }
-	      if (g.pointer1) { _downPointerIDs.delete(g.pointer1[2]); }
-	      g.end();
-	      return;
-	    }
+	      if (wayType === 'highway') {
+	        // entrances are considered connected
+	        if (node.tags.entrance && node.tags.entrance !== 'no') return true;
+	        if (node.tags.amenity === 'parking_entrance') return true;
+	      } else if (wayType === 'waterway') {
+	        if (node.id === way.first()) {
+	          // multiple waterways may start at the same spring
+	          if (node.tags.natural === 'spring') return true;
+	        } else {
+	          // multiple waterways may end at the same drain
+	          if (node.tags.manhole === 'drain') return true;
+	        }
+	      }
 
-	    event.preventDefault();
-	    event.stopImmediatePropagation();
+	      return graph.parentWays(node).some(function (parentWay) {
+	        if (parentWay.id === way.id) return false;
 
-	    var loc = _pointerLocGetter(event);
-	    var t, p, l;
+	        if (wayType === 'highway') {
+	          // allow connections to highway areas
+	          if (parentWay.geometry(graph) === 'area' && osmRoutableHighwayTagValues[parentWay.tags.highway]) return true; // count connections to ferry routes as connected
 
-	    if (isPointer0) { g.pointer0[0] = loc; }
-	    else if (isPointer1) { g.pointer1[0] = loc; }
+	          if (parentWay.tags.route === 'ferry') return true;
+	          return graph.parentRelations(parentWay).some(function (parentRelation) {
+	            if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true; // allow connections to highway multipolygons
 
-	    t = _transform;
-	    if (g.pointer1) {
-	      var p0 = g.pointer0[0], l0 = g.pointer0[1],
-	          p1 = g.pointer1[0], l1 = g.pointer1[1],
-	          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
-	          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
-	      t = scale(t, Math.sqrt(dp / dl));
-	      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
-	      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
-	    } else if (g.pointer0) {
-	      p = g.pointer0[0];
-	      l = g.pointer0[1];
+	            return parentRelation.isMultipolygon() && osmRoutableHighwayTagValues[parentRelation.tags.highway];
+	          });
+	        } else if (wayType === 'waterway') {
+	          // multiple waterways may start or end at a water body at the same node
+	          if (parentWay.tags.natural === 'water' || parentWay.tags.natural === 'coastline') return true;
+	        }
+
+	        return false;
+	      });
 	    }
-	    else { return; }
-	    g.zoom('touch', constrain(translate(t, p, l), g.extent, translateExtent));
-	  }
 
-	  function pointerup() {
-	    if (!_downPointerIDs.has(event.pointerId)) { return; }
+	    function issuesForNode(way, nodeID) {
+	      var isFirst = nodeID === way.first();
+	      var wayType = typeForWay(way); // ignore if this way is self-connected at this node
 
-	    _downPointerIDs.delete(event.pointerId);
+	      if (nodeOccursMoreThanOnce(way, nodeID)) return [];
+	      var osm = services.osm;
+	      if (!osm) return [];
+	      var node = graph.hasEntity(nodeID); // ignore if this node or its tile are unloaded
+
+	      if (!node || !osm.isDataLoaded(node.loc)) return [];
+	      if (isConnectedViaOtherTypes(way, node)) return [];
+	      var attachedWaysOfSameType = graph.parentWays(node).filter(function (parentWay) {
+	        if (parentWay.id === way.id) return false;
+	        return typeForWay(parentWay) === wayType;
+	      }); // assume it's okay for waterways to start or end disconnected for now
+
+	      if (wayType === 'waterway' && attachedWaysOfSameType.length === 0) return [];
+	      var attachedOneways = attachedWaysOfSameType.filter(function (attachedWay) {
+	        return isOneway(attachedWay);
+	      }); // ignore if the way is connected to some non-oneway features
+
+	      if (attachedOneways.length < attachedWaysOfSameType.length) return [];
+
+	      if (attachedOneways.length) {
+	        var connectedEndpointsOkay = attachedOneways.some(function (attachedOneway) {
+	          if ((isFirst ? attachedOneway.first() : attachedOneway.last()) !== nodeID) return true;
+	          if (nodeOccursMoreThanOnce(attachedOneway, nodeID)) return true;
+	          return false;
+	        });
+	        if (connectedEndpointsOkay) return [];
+	      }
 
-	    if (!_activeGesture) { return; }
+	      var placement = isFirst ? 'start' : 'end',
+	          messageID = wayType + '.',
+	          referenceID = wayType + '.';
 
-	    var g = gesture(this, arguments);
+	      if (wayType === 'waterway') {
+	        messageID += 'connected.' + placement;
+	        referenceID += 'connected';
+	      } else {
+	        messageID += placement;
+	        referenceID += placement;
+	      }
 
-	    event.stopImmediatePropagation();
+	      return [new validationIssue({
+	        type: type,
+	        subtype: wayType,
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.impossible_oneway.' + messageID + '.message', {
+	            feature: utilDisplayLabel(entity, context.graph())
+	          }) : '';
+	        },
+	        reference: getReference(referenceID),
+	        entityIds: [way.id, node.id],
+	        dynamicFixes: function dynamicFixes() {
+	          var fixes = [];
 
-	    if (g.pointer0 && g.pointer0[2] === event.pointerId) { delete g.pointer0; }
-	    else if (g.pointer1 && g.pointer1[2] === event.pointerId) { delete g.pointer1; }
+	          if (attachedOneways.length) {
+	            fixes.push(new validationIssueFix({
+	              icon: 'iD-operation-reverse',
+	              title: _t.html('issues.fix.reverse_feature.title'),
+	              entityIds: [way.id],
+	              onClick: function onClick(context) {
+	                var id = this.issue.entityIds[0];
+	                context.perform(actionReverse(id), _t('operations.reverse.annotation.line', {
+	                  n: 1
+	                }));
+	              }
+	            }));
+	          }
 
-	    if (g.pointer1 && !g.pointer0) {
-	      g.pointer0 = g.pointer1;
-	      delete g.pointer1;
+	          if (node.tags.noexit !== 'yes') {
+	            var textDirection = _mainLocalizer.textDirection();
+	            var useLeftContinue = isFirst && textDirection === 'ltr' || !isFirst && textDirection === 'rtl';
+	            fixes.push(new validationIssueFix({
+	              icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
+	              title: _t.html('issues.fix.continue_from_' + (isFirst ? 'start' : 'end') + '.title'),
+	              onClick: function onClick(context) {
+	                var entityID = this.issue.entityIds[0];
+	                var vertexID = this.issue.entityIds[1];
+	                var way = context.entity(entityID);
+	                var vertex = context.entity(vertexID);
+	                continueDrawing(way, vertex, context);
+	              }
+	            }));
+	          }
+
+	          return fixes;
+	        },
+	        loc: node.loc
+	      })];
+
+	      function getReference(referenceID) {
+	        return function showReference(selection) {
+	          selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.impossible_oneway.' + referenceID + '.reference'));
+	        };
+	      }
 	    }
-	    if (g.pointer0) { g.pointer0[1] = _transform.invert(g.pointer0[0]); }
-	    else {
-	      g.end();
+	  };
+
+	  function continueDrawing(way, vertex, context) {
+	    // make sure the vertex is actually visible and editable
+	    var map = context.map();
+
+	    if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+	      map.zoomToEase(vertex);
 	    }
-	  }
 
-	  zoom.wheelDelta = function(_) {
-	    return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
-	  };
+	    context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
+	  }
 
-	  zoom.filter = function(_) {
-	    return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
-	  };
+	  validation.type = type;
+	  return validation;
+	}
 
-	  zoom.extent = function(_) {
-	    return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
-	  };
+	function validationIncompatibleSource() {
+	  var type = 'incompatible_source';
+	  var invalidSources = [{
+	    id: 'google',
+	    regex: 'google',
+	    exceptRegex: 'books.google|Google Books|drive.google|googledrive|Google Drive'
+	  }];
+
+	  var validation = function checkIncompatibleSource(entity) {
+	    var entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
+	    if (!entitySources) return [];
+	    var issues = [];
+	    invalidSources.forEach(function (invalidSource) {
+	      var hasInvalidSource = entitySources.some(function (source) {
+	        if (!source.match(new RegExp(invalidSource.regex, 'i'))) return false;
+	        if (invalidSource.exceptRegex && source.match(new RegExp(invalidSource.exceptRegex, 'i'))) return false;
+	        return true;
+	      });
+	      if (!hasInvalidSource) return;
+	      issues.push(new validationIssue({
+	        type: type,
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.incompatible_source.' + invalidSource.id + '.feature.message', {
+	            feature: utilDisplayLabel(entity, context.graph())
+	          }) : '';
+	        },
+	        reference: getReference(invalidSource.id),
+	        entityIds: [entity.id],
+	        dynamicFixes: function dynamicFixes() {
+	          return [new validationIssueFix({
+	            title: _t.html('issues.fix.remove_proprietary_data.title')
+	          })];
+	        }
+	      }));
+	    });
+	    return issues;
 
-	  zoom.scaleExtent = function(_) {
-	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+	    function getReference(id) {
+	      return function showReference(selection) {
+	        selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.incompatible_source.' + id + '.reference'));
+	      };
+	    }
 	  };
 
-	  zoom.translateExtent = function(_) {
-	    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
-	  };
+	  validation.type = type;
+	  return validation;
+	}
 
-	  zoom.constrain = function(_) {
-	    return arguments.length ? (constrain = _, zoom) : constrain;
-	  };
+	function validationMaprules() {
+	  var type = 'maprules';
 
-	  zoom.interpolate = function(_) {
-	    return arguments.length ? (interpolate = _, zoom) : interpolate;
-	  };
+	  var validation = function checkMaprules(entity, graph) {
+	    if (!services.maprules) return [];
+	    var rules = services.maprules.validationRules();
+	    var issues = [];
 
-	  zoom._transform = function(_) {
-	    return arguments.length ? (_transform = _, zoom) : _transform;
-	  };
+	    for (var i = 0; i < rules.length; i++) {
+	      var rule = rules[i];
+	      rule.findIssues(entity, graph, issues);
+	    }
 
-	  zoom.on = function() {
-	    var value = listeners.on.apply(listeners, arguments);
-	    return value === listeners ? zoom : value;
+	    return issues;
 	  };
 
-	  return zoom;
+	  validation.type = type;
+	  return validation;
 	}
 
-	// A custom double-click / double-tap event detector that works on touch devices
-	// if pointer events are supported. Falls back to default `dblclick` event.
-	function utilDoubleUp() {
+	function validationMismatchedGeometry() {
+	  var type = 'mismatched_geometry';
+
+	  function tagSuggestingLineIsArea(entity) {
+	    if (entity.type !== 'way' || entity.isClosed()) return null;
+	    var tagSuggestingArea = entity.tagSuggestingArea();
 
-	    var dispatch$1 = dispatch('doubleUp');
+	    if (!tagSuggestingArea) {
+	      return null;
+	    }
 
-	    var _maxTimespan = 500; // milliseconds
-	    var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
-	    var _pointer; // object representing the pointer that could trigger double up
+	    var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
+	    var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
 
-	    function pointerIsValidFor(loc) {
-	        // second pointerup must occur within a small timeframe after the first pointerdown
-	        return new Date().getTime() - _pointer.startTime <= _maxTimespan &&
-	            // all pointer events must occur within a small distance of the first pointerdown
-	            geoVecLength(_pointer.startLoc, loc) <= _maxDistance;
+	    if (asLine && asArea && asLine === asArea) {
+	      // these tags also allow lines and making this an area wouldn't matter
+	      return null;
 	    }
 
-	    function pointerdown() {
+	    return tagSuggestingArea;
+	  }
 
-	        // ignore right-click
-	        if (event.ctrlKey || event.button === 2) { return; }
+	  function makeConnectEndpointsFixOnClick(way, graph) {
+	    // must have at least three nodes to close this automatically
+	    if (way.nodes.length < 3) return null;
+	    var nodes = graph.childNodes(way),
+	        testNodes;
+	    var firstToLastDistanceMeters = geoSphericalDistance(nodes[0].loc, nodes[nodes.length - 1].loc); // if the distance is very small, attempt to merge the endpoints
 
-	        var loc = [event.clientX, event.clientY];
+	    if (firstToLastDistanceMeters < 0.75) {
+	      testNodes = nodes.slice(); // shallow copy
 
-	        // Don't rely on pointerId here since it can change between pointerdown
-	        // events on touch devices
-	        if (_pointer && !pointerIsValidFor(loc)) {
-	            // if this pointer is no longer valid, clear it so another can be started
-	            _pointer = undefined;
-	        }
+	      testNodes.pop();
+	      testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-	        if (!_pointer) {
-	            _pointer = {
-	                startLoc: loc,
-	                startTime: new Date().getTime(),
-	                upCount: 0,
-	                pointerId: event.pointerId
-	            };
-	        } else { // double down
-	            _pointer.pointerId = event.pointerId;
-	        }
-	    }
+	      if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
+	        return function (context) {
+	          var way = context.entity(this.issue.entityIds[0]);
+	          context.perform(actionMergeNodes([way.nodes[0], way.nodes[way.nodes.length - 1]], nodes[0].loc), _t('issues.fix.connect_endpoints.annotation'));
+	        };
+	      }
+	    } // if the points were not merged, attempt to close the way
 
-	    function pointerup() {
 
-	        // ignore right-click
-	        if (event.ctrlKey || event.button === 2) { return; }
+	    testNodes = nodes.slice(); // shallow copy
+
+	    testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-	        if (!_pointer || _pointer.pointerId !== event.pointerId) { return; }
+	    if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
+	      return function (context) {
+	        var wayId = this.issue.entityIds[0];
+	        var way = context.entity(wayId);
+	        var nodeId = way.nodes[0];
+	        var index = way.nodes.length;
+	        context.perform(actionAddVertex(wayId, nodeId, index), _t('issues.fix.connect_endpoints.annotation'));
+	      };
+	    }
+	  }
 
-	        _pointer.upCount += 1;
+	  function lineTaggedAsAreaIssue(entity) {
+	    var tagSuggestingArea = tagSuggestingLineIsArea(entity);
+	    if (!tagSuggestingArea) return null;
+	    return new validationIssue({
+	      type: type,
+	      subtype: 'area_as_line',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.tag_suggests_area.message', {
+	          feature: utilDisplayLabel(entity, 'area'),
+	          tag: utilTagText({
+	            tags: tagSuggestingArea
+	          })
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      hash: JSON.stringify(tagSuggestingArea),
+	      dynamicFixes: function dynamicFixes(context) {
+	        var fixes = [];
+	        var entity = context.entity(this.entityIds[0]);
+	        var connectEndsOnClick = makeConnectEndpointsFixOnClick(entity, context.graph());
+	        fixes.push(new validationIssueFix({
+	          title: _t.html('issues.fix.connect_endpoints.title'),
+	          onClick: connectEndsOnClick
+	        }));
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.remove_tag.title'),
+	          onClick: function onClick(context) {
+	            var entityId = this.issue.entityIds[0];
+	            var entity = context.entity(entityId);
+	            var tags = Object.assign({}, entity.tags); // shallow copy
 
-	        if (_pointer.upCount === 2) { // double up!
-	            var loc = [event.clientX, event.clientY];
-	            if (pointerIsValidFor(loc)) {
-	                var locInThis = utilFastMouse(this)(event);
-	                dispatch$1.call('doubleUp', this, locInThis);
+	            for (var key in tagSuggestingArea) {
+	              delete tags[key];
 	            }
-	            // clear the pointer info in any case
-	            _pointer = undefined;
-	        }
-	    }
 
-	    function doubleUp(selection) {
-	        if ('PointerEvent' in window) {
-	            // dblclick isn't well supported on touch devices so manually use
-	            // pointer events if they're available
-	            selection
-	                .on('pointerdown.doubleUp', pointerdown)
-	                .on('pointerup.doubleUp', pointerup);
-	        } else {
-	            // fallback to dblclick
-	            selection
-	                .on('dblclick.doubleUp', function() {
-	                    dispatch$1.call('doubleUp', this, utilFastMouse(this)(event));
-	                });
-	        }
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
+	          }
+	        }));
+	        return fixes;
+	      }
+	    });
+
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.tag_suggests_area.reference'));
 	    }
+	  }
 
-	    doubleUp.off = function(selection) {
-	        selection
-	            .on('pointerdown.doubleUp', null)
-	            .on('pointerup.doubleUp', null)
-	            .on('dblclick.doubleUp', null);
-	    };
+	  function vertexTaggedAsPointIssue(entity, graph) {
+	    // we only care about nodes
+	    if (entity.type !== 'node') return null; // ignore tagless points
 
-	    return utilRebind(doubleUp, dispatch$1, 'on');
-	}
+	    if (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them
 
-	// constants
-	var TILESIZE = 256;
-	var minZoom = 2;
-	var maxZoom = 24;
-	var kMin = geoZoomToScale(minZoom, TILESIZE);
-	var kMax = geoZoomToScale(maxZoom, TILESIZE);
+	    if (entity.isOnAddressLine(graph)) return null;
+	    var geometry = entity.geometry(graph);
+	    var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
 
-	function clamp(num, min, max) {
-	    return Math.max(min, Math.min(num, max));
-	}
+	    if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
+	      return new validationIssue({
+	        type: type,
+	        subtype: 'vertex_as_point',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.vertex_as_point.message', {
+	            feature: utilDisplayLabel(entity, 'vertex')
+	          }) : '';
+	        },
+	        reference: function showReference(selection) {
+	          selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.vertex_as_point.reference'));
+	        },
+	        entityIds: [entity.id]
+	      });
+	    } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
+	      return new validationIssue({
+	        type: type,
+	        subtype: 'point_as_vertex',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.point_as_vertex.message', {
+	            feature: utilDisplayLabel(entity, 'point')
+	          }) : '';
+	        },
+	        reference: function showReference(selection) {
+	          selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.point_as_vertex.reference'));
+	        },
+	        entityIds: [entity.id],
+	        dynamicFixes: function dynamicFixes(context) {
+	          var entityId = this.entityIds[0];
+	          var extractOnClick = null;
 
+	          if (!context.hasHiddenConnections(entityId)) {
+	            extractOnClick = function extractOnClick(context) {
+	              var entityId = this.issue.entityIds[0];
+	              var action = actionExtract(entityId);
+	              context.perform(action, _t('operations.extract.annotation', {
+	                n: 1
+	              })); // re-enter mode to trigger updates
 
-	function rendererMap(context) {
-	    var dispatch$1 = dispatch(
-	        'move', 'drawn',
-	        'crossEditableZoom', 'hitMinZoom',
-	        'changeHighlighting', 'changeAreaFill'
-	    );
-	    var projection = context.projection;
-	    var curtainProjection = context.curtainProjection;
-	    var drawLayers;
-	    var drawPoints;
-	    var drawVertices;
-	    var drawLines;
-	    var drawAreas;
-	    var drawMidpoints;
-	    var drawLabels;
-
-	    var _selection = select(null);
-	    var supersurface = select(null);
-	    var wrapper = select(null);
-	    var surface = select(null);
-
-	    var _dimensions = [1, 1];
-	    var _dblClickZoomEnabled = true;
-	    var _redrawEnabled = true;
-	    var _gestureTransformStart;
-	    var _transformStart = projection.transform();
-	    var _transformLast;
-	    var _isTransformed = false;
-	    var _minzoom = 0;
-	    var _getMouseCoords;
-	    var _lastPointerEvent;
-	    var _lastWithinEditableZoom;
-
-	    // whether a pointerdown event started the zoom
-	    var _pointerDown = false;
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-	    // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
-	    var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
-
-	    var _zoomerPanner = _zoomerPannerFunction()
-	        .scaleExtent([kMin, kMax])
-	        .interpolate(interpolate)
-	        .filter(zoomEventFilter)
-	        .on('zoom.map', zoomPan)
-	        .on('start.map', function() {
-	            _pointerDown = event.sourceEvent && event.sourceEvent.type === 'pointerdown';
-	        })
-	        .on('end.map', function() {
-	            _pointerDown = false;
-	        });
-	    var _doubleUpHandler = utilDoubleUp();
-
-	    var scheduleRedraw = throttle(redraw, 750);
-	    // var isRedrawScheduled = false;
-	    // var pendingRedrawCall;
-	    // function scheduleRedraw() {
-	    //     // Only schedule the redraw if one has not already been set.
-	    //     if (isRedrawScheduled) return;
-	    //     isRedrawScheduled = true;
-	    //     var that = this;
-	    //     var args = arguments;
-	    //     pendingRedrawCall = window.requestIdleCallback(function () {
-	    //         // Reset the boolean so future redraws can be set.
-	    //         isRedrawScheduled = false;
-	    //         redraw.apply(that, args);
-	    //     }, { timeout: 1400 });
-	    // }
+	              context.enter(modeSelect(context, [action.getExtractedNodeID()]));
+	            };
+	          }
 
-	    function cancelPendingRedraw() {
-	        scheduleRedraw.cancel();
-	        // isRedrawScheduled = false;
-	        // window.cancelIdleCallback(pendingRedrawCall);
+	          return [new validationIssueFix({
+	            icon: 'iD-operation-extract',
+	            title: _t.html('issues.fix.extract_point.title'),
+	            onClick: extractOnClick
+	          })];
+	        }
+	      });
 	    }
 
+	    return null;
+	  }
 
-	    function map(selection) {
-	        _selection = selection;
+	  function unclosedMultipolygonPartIssues(entity, graph) {
+	    if (entity.type !== 'relation' || !entity.isMultipolygon() || entity.isDegenerate() || // cannot determine issues for incompletely-downloaded relations
+	    !entity.isComplete(graph)) return null;
+	    var sequences = osmJoinWays(entity.members, graph);
+	    var issues = [];
 
-	        context
-	            .on('change.map', immediateRedraw);
+	    for (var i in sequences) {
+	      var sequence = sequences[i];
+	      if (!sequence.nodes) continue;
+	      var firstNode = sequence.nodes[0];
+	      var lastNode = sequence.nodes[sequence.nodes.length - 1]; // part is closed if the first and last nodes are the same
 
-	        var osm = context.connection();
-	        if (osm) {
-	            osm.on('change.map', immediateRedraw);
-	        }
+	      if (firstNode === lastNode) continue;
+	      var issue = new validationIssue({
+	        type: type,
+	        subtype: 'unclosed_multipolygon_part',
+	        severity: 'warning',
+	        message: function message(context) {
+	          var entity = context.hasEntity(this.entityIds[0]);
+	          return entity ? _t.html('issues.unclosed_multipolygon_part.message', {
+	            feature: utilDisplayLabel(entity, context.graph())
+	          }) : '';
+	        },
+	        reference: showReference,
+	        loc: sequence.nodes[0].loc,
+	        entityIds: [entity.id],
+	        hash: sequence.map(function (way) {
+	          return way.id;
+	        }).join()
+	      });
+	      issues.push(issue);
+	    }
 
-	        function didUndoOrRedo(targetTransform) {
-	            var mode = context.mode().id;
-	            if (mode !== 'browse' && mode !== 'select') { return; }
-	            if (targetTransform) {
-	                map.transformEase(targetTransform);
-	            }
-	        }
+	    return issues;
 
-	        context.history()
-	            .on('merge.map', function() { scheduleRedraw(); })
-	            .on('change.map', immediateRedraw)
-	            .on('undone.map', function(stack, fromStack) {
-	                didUndoOrRedo(fromStack.transform);
-	            })
-	            .on('redone.map', function(stack) {
-	                didUndoOrRedo(stack.transform);
-	            });
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unclosed_multipolygon_part.reference'));
+	    }
+	  }
 
-	        context.background()
-	            .on('change.map', immediateRedraw);
+	  var validation = function checkMismatchedGeometry(entity, graph) {
+	    var issues = [vertexTaggedAsPointIssue(entity, graph), lineTaggedAsAreaIssue(entity)];
+	    issues = issues.concat(unclosedMultipolygonPartIssues(entity, graph));
+	    return issues.filter(Boolean);
+	  };
 
-	        context.features()
-	            .on('redraw.map', immediateRedraw);
+	  validation.type = type;
+	  return validation;
+	}
 
-	        drawLayers
-	            .on('change.map', function() {
-	                context.background().updateImagery();
-	                immediateRedraw();
-	            });
+	function validationMissingRole() {
+	  var type = 'missing_role';
 
-	        selection
-	            .on('wheel.map mousewheel.map', function() {
-	                // disable swipe-to-navigate browser pages on trackpad/magic mouse – #5552
-	                event.preventDefault();
-	            })
-	            .call(_zoomerPanner)
-	            .call(_zoomerPanner.transform, projection.transform())
-	            .on('dblclick.zoom', null); // override d3-zoom dblclick handling
-
-	        map.supersurface = supersurface = selection.append('div')
-	            .attr('class', 'supersurface')
-	            .call(utilSetTransform, 0, 0);
-
-	        // Need a wrapper div because Opera can't cope with an absolutely positioned
-	        // SVG element: http://bl.ocks.org/jfirebaugh/6fbfbd922552bf776c16
-	        wrapper = supersurface
-	            .append('div')
-	            .attr('class', 'layer layer-data');
-
-	        map.surface = surface = wrapper
-	            .call(drawLayers)
-	            .selectAll('.surface');
-
-	        surface
-	            .call(drawLabels.observe)
-	            .call(_doubleUpHandler)
-	            .on(_pointerPrefix + 'down.zoom', function() {
-	                _lastPointerEvent = event;
-	                if (event.button === 2) {
-	                    event.stopPropagation();
-	                }
-	            }, true)
-	            .on(_pointerPrefix + 'up.zoom', function() {
-	                _lastPointerEvent = event;
-	                if (resetTransform()) {
-	                    immediateRedraw();
-	                }
-	            })
-	            .on(_pointerPrefix + 'move.map', function() {
-	                _lastPointerEvent = event;
-	            })
-	            .on(_pointerPrefix + 'over.vertices', function() {
-	                if (map.editableDataEnabled() && !_isTransformed) {
-	                    var hover = event.target.__data__;
-	                    surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
-	                    dispatch$1.call('drawn', this, { full: false });
-	                }
-	            })
-	            .on(_pointerPrefix + 'out.vertices', function() {
-	                if (map.editableDataEnabled() && !_isTransformed) {
-	                    var hover = event.relatedTarget && event.relatedTarget.__data__;
-	                    surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
-	                    dispatch$1.call('drawn', this, { full: false });
-	                }
-	            });
+	  var validation = function checkMissingRole(entity, graph) {
+	    var issues = [];
 
-	        var detected = utilDetect();
+	    if (entity.type === 'way') {
+	      graph.parentRelations(entity).forEach(function (relation) {
+	        if (!relation.isMultipolygon()) return;
+	        var member = relation.memberById(entity.id);
 
-	        // only WebKit supports gesture events
-	        if ('GestureEvent' in window &&
-	            // Listening for gesture events on iOS 13.4+ breaks double-tapping,
-	            // but we only need to do this on desktop Safari anyway. – #7694
-	            !detected.isMobileWebKit) {
+	        if (member && isMissingRole(member)) {
+	          issues.push(makeIssue(entity, relation, member));
+	        }
+	      });
+	    } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+	      entity.indexedMembers().forEach(function (member) {
+	        var way = graph.hasEntity(member.id);
 
-	            // Desktop Safari sends gesture events for multitouch trackpad pinches.
-	            // We can listen for these and translate them into map zooms.
-	            surface
-	                .on('gesturestart.surface', function() {
-	                    event.preventDefault();
-	                    _gestureTransformStart = projection.transform();
-	                })
-	                .on('gesturechange.surface', gestureChange);
+	        if (way && isMissingRole(member)) {
+	          issues.push(makeIssue(way, entity, member));
 	        }
+	      });
+	    }
 
-	        // must call after surface init
-	        updateAreaFill();
+	    return issues;
+	  };
 
-	        _doubleUpHandler.on('doubleUp.map', function(p0) {
-	            if (!_dblClickZoomEnabled) { return; }
+	  function isMissingRole(member) {
+	    return !member.role || !member.role.trim().length;
+	  }
 
-	            // don't zoom if targeting something other than the map itself
-	            if (typeof event.target.__data__ === 'object' &&
-	                // or area fills
-	                !select(event.target).classed('fill')) { return; }
+	  function makeIssue(way, relation, member) {
+	    return new validationIssue({
+	      type: type,
+	      severity: 'warning',
+	      message: function message(context) {
+	        var member = context.hasEntity(this.entityIds[1]),
+	            relation = context.hasEntity(this.entityIds[0]);
+	        return member && relation ? _t.html('issues.missing_role.message', {
+	          member: utilDisplayLabel(member, context.graph()),
+	          relation: utilDisplayLabel(relation, context.graph())
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: [relation.id, way.id],
+	      data: {
+	        member: member
+	      },
+	      hash: member.index.toString(),
+	      dynamicFixes: function dynamicFixes() {
+	        return [makeAddRoleFix('inner'), makeAddRoleFix('outer'), new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.remove_from_relation.title'),
+	          onClick: function onClick(context) {
+	            context.perform(actionDeleteMember(this.issue.entityIds[0], this.issue.data.member.index), _t('operations.delete_member.annotation', {
+	              n: 1
+	            }));
+	          }
+	        })];
+	      }
+	    });
 
-	            var zoomOut = event.shiftKey;
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.missing_role.multipolygon.reference'));
+	    }
+	  }
 
-	            var t = projection.transform();
+	  function makeAddRoleFix(role) {
+	    return new validationIssueFix({
+	      title: _t.html('issues.fix.set_as_' + role + '.title'),
+	      onClick: function onClick(context) {
+	        var oldMember = this.issue.data.member;
+	        var member = {
+	          id: this.issue.entityIds[1],
+	          type: oldMember.type,
+	          role: role
+	        };
+	        context.perform(actionChangeMember(this.issue.entityIds[0], member, oldMember.index), _t('operations.change_role.annotation', {
+	          n: 1
+	        }));
+	      }
+	    });
+	  }
 
-	            var p1 = t.invert(p0);
+	  validation.type = type;
+	  return validation;
+	}
 
-	            t = t.scale(zoomOut ? 0.5 : 2);
+	function validationMissingTag(context) {
+	  var type = 'missing_tag';
 
-	            t.x = p0[0] - p1[0] * t.k;
-	            t.y = p0[1] - p1[1] * t.k;
+	  function hasDescriptiveTags(entity, graph) {
+	    var keys = Object.keys(entity.tags).filter(function (k) {
+	      if (k === 'area' || k === 'name') {
+	        return false;
+	      } else {
+	        return osmIsInterestingTag(k);
+	      }
+	    });
 
-	            map.transformEase(t);
-	        });
+	    if (entity.type === 'relation' && keys.length === 1 && entity.tags.type === 'multipolygon') {
+	      // this relation's only interesting tag just says its a multipolygon,
+	      // which is not descriptive enough
+	      // It's okay for a simple multipolygon to have no descriptive tags
+	      // if its outer way has them (old model, see `outdated_tags.js`)
+	      return osmOldMultipolygonOuterMemberOfRelation(entity, graph);
+	    }
 
-	        context.on('enter.map',  function() {
-	            if (!map.editableDataEnabled(true /* skip zoom check */)) { return; }
-
-	            // redraw immediately any objects affected by a change in selectedIDs.
-	            var graph = context.graph();
-	            var selectedAndParents = {};
-	            context.selectedIDs().forEach(function(id) {
-	                var entity = graph.hasEntity(id);
-	                if (entity) {
-	                    selectedAndParents[entity.id] = entity;
-	                    if (entity.type === 'node') {
-	                        graph.parentWays(entity).forEach(function(parent) {
-	                            selectedAndParents[parent.id] = parent;
-	                        });
-	                    }
-	                }
-	            });
-	            var data = Object.values(selectedAndParents);
-	            var filter = function(d) { return d.id in selectedAndParents; };
+	    return keys.length > 0;
+	  }
 
-	            data = context.features().filter(data, graph);
+	  function isUnknownRoad(entity) {
+	    return entity.type === 'way' && entity.tags.highway === 'road';
+	  }
 
-	            surface
-	                .call(drawVertices.drawSelected, graph, map.extent())
-	                .call(drawLines, graph, data, filter)
-	                .call(drawAreas, graph, data, filter)
-	                .call(drawMidpoints, graph, data, filter, map.trimmedExtent());
+	  function isUntypedRelation(entity) {
+	    return entity.type === 'relation' && !entity.tags.type;
+	  }
 
-	            dispatch$1.call('drawn', this, { full: false });
+	  var validation = function checkMissingTag(entity, graph) {
+	    var subtype;
+	    var osm = context.connection();
+	    var isUnloadedNode = entity.type === 'node' && osm && !osm.isDataLoaded(entity.loc); // we can't know if the node is a vertex if the tile is undownloaded
+
+	    if (!isUnloadedNode && // allow untagged nodes that are part of ways
+	    entity.geometry(graph) !== 'vertex' && // allow untagged entities that are part of relations
+	    !entity.hasParentRelations(graph)) {
+	      if (Object.keys(entity.tags).length === 0) {
+	        subtype = 'any';
+	      } else if (!hasDescriptiveTags(entity, graph)) {
+	        subtype = 'descriptive';
+	      } else if (isUntypedRelation(entity)) {
+	        subtype = 'relation_type';
+	      }
+	    } // flag an unknown road even if it's a member of a relation
 
-	            // redraw everything else later
-	            scheduleRedraw();
-	        });
 
-	        map.dimensions(utilGetDimensions(selection));
+	    if (!subtype && isUnknownRoad(entity)) {
+	      subtype = 'highway_classification';
 	    }
 
+	    if (!subtype) return [];
+	    var messageID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag.' + subtype;
+	    var referenceID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag'; // can always delete if the user created it in the first place..
 
-	    function zoomEventFilter() {
-	        // Fix for #2151, (see also d3/d3-zoom#60, d3/d3-brush#18)
-	        // Intercept `mousedown` and check if there is an orphaned zoom gesture.
-	        // This can happen if a previous `mousedown` occurred without a `mouseup`.
-	        // If we detect this, dispatch `mouseup` to complete the orphaned gesture,
-	        // so that d3-zoom won't stop propagation of new `mousedown` events.
-	        if (event.type === 'mousedown') {
-	            var hasOrphan = false;
-	            var listeners = window.__on;
-	            for (var i = 0; i < listeners.length; i++) {
-	                var listener = listeners[i];
-	                if (listener.name === 'zoom' && listener.type === 'mouseup') {
-	                    hasOrphan = true;
-	                    break;
-	                }
-	            }
-	            if (hasOrphan) {
-	                var event$1 = window.CustomEvent;
-	                if (event$1) {
-	                    event$1 = new event$1('mouseup');
-	                } else {
-	                    event$1 = window.document.createEvent('Event');
-	                    event$1.initEvent('mouseup', false, false);
-	                }
-	                // Event needs to be dispatched with an event.view property.
-	                event$1.view = window;
-	                window.dispatchEvent(event$1);
+	    var canDelete = entity.version === undefined || entity.v !== undefined;
+	    var severity = canDelete && subtype !== 'highway_classification' ? 'error' : 'warning';
+	    return [new validationIssue({
+	      type: type,
+	      subtype: subtype,
+	      severity: severity,
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.' + messageID + '.message', {
+	          feature: utilDisplayLabel(entity, context.graph())
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      dynamicFixes: function dynamicFixes(context) {
+	        var fixes = [];
+	        var selectFixType = subtype === 'highway_classification' ? 'select_road_type' : 'select_preset';
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-icon-search',
+	          title: _t.html('issues.fix.' + selectFixType + '.title'),
+	          onClick: function onClick(context) {
+	            context.ui().sidebar.showPresetList();
+	          }
+	        }));
+	        var deleteOnClick;
+	        var id = this.entityIds[0];
+	        var operation = operationDelete(context, [id]);
+	        var disabledReasonID = operation.disabled();
+
+	        if (!disabledReasonID) {
+	          deleteOnClick = function deleteOnClick(context) {
+	            var id = this.issue.entityIds[0];
+	            var operation = operationDelete(context, [id]);
+
+	            if (!operation.disabled()) {
+	              operation();
 	            }
+	          };
 	        }
 
-	        return event.button !== 2;   // ignore right clicks
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.delete_feature.title'),
+	          disabledReason: disabledReasonID ? _t('operations.delete.' + disabledReasonID + '.single') : undefined,
+	          onClick: deleteOnClick
+	        }));
+	        return fixes;
+	      }
+	    })];
+
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.' + referenceID + '.reference'));
 	    }
+	  };
+
+	  validation.type = type;
+	  return validation;
+	}
 
+	var simplify = function simplify(str) {
+	  return diacritics.remove(str.replace(/&/g, 'and').replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u2016\u2017\u2020-\u2027\u2030-\u2038\u203b-\u203e\u2041-\u2043\u2047-\u2051\u2053\u2055-\u205e\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00\u2e01\u2e06-\u2e08\u2e0b\u2e0e-\u2e16\u2e18\u2e19\u2e1b\u2e1e\u2e1f\u2e2a-\u2e2e\u2e30-\u2e39\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g, '').toLowerCase());
+	};
 
-	    function pxCenter() {
-	        return [_dimensions[0] / 2, _dimensions[1] / 2];
-	    }
+	// {
+	//   kvnd:        "amenity/fast_food|Thaï Express~(North America)",
+	//   kvn:         "amenity/fast_food|Thaï Express",
+	//   kv:          "amenity/fast_food",
+	//   k:           "amenity",
+	//   v:           "fast_food",
+	//   n:           "Thaï Express",
+	//   d:           "(North America)",
+	//   nsimple:     "thaiexpress",
+	//   kvnnsimple:  "amenity/fast_food|thaiexpress"
+	// }
 
+	var to_parts = function to_parts(kvnd) {
+	  var parts = {};
+	  parts.kvnd = kvnd;
+	  var kvndparts = kvnd.split('~', 2);
+	  if (kvndparts.length > 1) parts.d = kvndparts[1];
+	  parts.kvn = kvndparts[0];
+	  var kvnparts = parts.kvn.split('|', 2);
+	  if (kvnparts.length > 1) parts.n = kvnparts[1];
+	  parts.kv = kvnparts[0];
+	  var kvparts = parts.kv.split('/', 2);
+	  parts.k = kvparts[0];
+	  parts.v = kvparts[1];
+	  parts.nsimple = simplify(parts.n);
+	  parts.kvnsimple = parts.kv + '|' + parts.nsimple;
+	  return parts;
+	};
 
-	    function drawEditable(difference, extent) {
-	        var mode = context.mode();
-	        var graph = context.graph();
-	        var features = context.features();
-	        var all = context.history().intersects(map.extent());
-	        var fullRedraw = false;
-	        var data;
-	        var set;
-	        var filter;
-	        var applyFeatureLayerFilters = true;
-
-	        if (map.isInWideSelection()) {
-	            data = [];
-	            utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function(id) {
-	                var entity = context.hasEntity(id);
-	                if (entity) { data.push(entity); }
-	            });
-	            fullRedraw = true;
-	            filter = utilFunctor(true);
-	            // selected features should always be visible, so we can skip filtering
-	            applyFeatureLayerFilters = false;
-
-	        } else if (difference) {
-	            var complete = difference.complete(map.extent());
-	            data = Object.values(complete).filter(Boolean);
-	            set = new Set(Object.keys(complete));
-	            filter = function(d) { return set.has(d.id); };
-	            features.clear(data);
+	var matchGroups = {adult_gaming_centre:["amenity/casino","amenity/gambling","leisure/adult_gaming_centre"],beauty:["shop/beauty","shop/hairdresser_supply"],bed:["shop/bed","shop/furniture"],beverages:["shop/alcohol","shop/beverages"],camping:["leisure/park","tourism/camp_site","tourism/caravan_site"],car_parts:["shop/car_parts","shop/car_repair","shop/tires","shop/tyres"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/newsagent"],coworking:["amenity/coworking_space","office/coworking","office/coworking_space"],electronics:["office/telecommunication","shop/computer","shop/electronics","shop/hifi","shop/mobile","shop/mobile_phone","shop/telecommunication"],fashion:["shop/accessories","shop/bag","shop/botique","shop/clothes","shop/department_store","shop/fashion","shop/fashion_accessories","shop/sports","shop/shoes"],financial:["amenity/bank","office/accountant","office/financial","office/financial_advisor","office/tax_advisor","shop/tax"],fitness:["leisure/fitness_centre","leisure/fitness_center","leisure/sports_centre","leisure/sports_center"],food:["amenity/cafe","amenity/fast_food","amenity/ice_cream","amenity/restaurant","shop/bakery","shop/ice_cream","shop/pastry","shop/tea","shop/coffee"],fuel:["amenity/fuel","shop/gas","shop/convenience;gas","shop/gas;convenience"],gift:["shop/gift","shop/card","shop/cards","shop/stationery"],hardware:["shop/carpet","shop/diy","shop/doityourself","shop/doors","shop/electrical","shop/flooring","shop/hardware","shop/power_tools","shop/tool_hire","shop/tools","shop/trade"],health_food:["shop/health","shop/health_food","shop/herbalist","shop/nutrition_supplements"],houseware:["shop/houseware","shop/interior_decoration"],lodging:["tourism/hotel","tourism/motel"],money_transfer:["amenity/money_transfer","shop/money_transfer"],outdoor:["shop/outdoor","shop/sports"],rental:["amenity/bicycle_rental","amenity/boat_rental","amenity/car_rental","amenity/truck_rental","amenity/vehicle_rental","shop/rental"],school:["amenity/childcare","amenity/college","amenity/kindergarten","amenity/language_school","amenity/prep_school","amenity/school","amenity/university"],supermarket:["shop/food","shop/frozen_food","shop/greengrocer","shop/grocery","shop/supermarket","shop/wholesale"],variety_store:["shop/variety_store","shop/supermarket","shop/discount","shop/convenience"],vending:["amenity/vending_machine","shop/vending_machine"],wholesale:["shop/wholesale","shop/supermarket","shop/department_store"]};
+	var require$$0 = {
+	matchGroups: matchGroups
+	};
 
-	        } else {
-	            // force a full redraw if gatherStats detects that a feature
-	            // should be auto-hidden (e.g. points or buildings)..
-	            if (features.gatherStats(all, graph, _dimensions)) {
-	                extent = undefined;
-	            }
+	var matchGroups$1 = require$$0.matchGroups;
 
-	            if (extent) {
-	                data = context.history().intersects(map.extent().intersection(extent));
-	                set = new Set(data.map(function(entity) { return entity.id; }));
-	                filter = function(d) { return set.has(d.id); };
+	var matcher$1 = function matcher() {
+	  var _warnings = []; // array of match conflict pairs
 
-	            } else {
-	                data = all;
-	                fullRedraw = true;
-	                filter = utilFunctor(true);
-	            }
-	        }
+	  var _ambiguous = {};
+	  var _matchIndex = {};
+	  var matcher = {}; // Create an index of all the keys/simplenames for fast matching
 
-	        if (applyFeatureLayerFilters) {
-	            data = features.filter(data, graph);
-	        } else {
-	            context.features().resetStats();
-	        }
+	  matcher.buildMatchIndex = function (brands) {
+	    // two passes - once for primary names, once for secondary/alternate names
+	    Object.keys(brands).forEach(function (kvnd) {
+	      return insertNames(kvnd, 'primary');
+	    });
+	    Object.keys(brands).forEach(function (kvnd) {
+	      return insertNames(kvnd, 'secondary');
+	    });
 
-	        if (mode && mode.id === 'select') {
-	            // update selected vertices - the user might have just double-clicked a way,
-	            // creating a new vertex, triggering a partial redraw without a mode change
-	            surface.call(drawVertices.drawSelected, graph, map.extent());
-	        }
+	    function insertNames(kvnd, which) {
+	      var obj = brands[kvnd];
+	      var parts = to_parts(kvnd); // Exit early for ambiguous names in the second pass.
+	      // They were collected in the first pass and we don't gather alt names for them.
 
-	        surface
-	            .call(drawVertices, graph, data, filter, map.extent(), fullRedraw)
-	            .call(drawLines, graph, data, filter)
-	            .call(drawAreas, graph, data, filter)
-	            .call(drawMidpoints, graph, data, filter, map.trimmedExtent())
-	            .call(drawLabels, graph, data, filter, _dimensions, fullRedraw)
-	            .call(drawPoints, graph, data, filter);
+	      if (which === 'secondary' && parts.d) return;
 
-	        dispatch$1.call('drawn', this, {full: true});
-	    }
+	      if (obj.countryCodes) {
+	        parts.countryCodes = obj.countryCodes.slice(); // copy
+	      }
 
-	    map.init = function() {
-	        drawLayers = svgLayers(projection, context);
-	        drawPoints = svgPoints(projection, context);
-	        drawVertices = svgVertices(projection, context);
-	        drawLines = svgLines(projection, context);
-	        drawAreas = svgAreas(projection, context);
-	        drawMidpoints = svgMidpoints(projection, context);
-	        drawLabels = svgLabels(projection, context);
-	    };
+	      var nomatches = obj.nomatch || [];
 
-	    function editOff() {
-	        context.features().resetStats();
-	        surface.selectAll('.layer-osm *').remove();
-	        surface.selectAll('.layer-touch:not(.markers) *').remove();
-
-	        var allowed = {
-	            'browse': true,
-	            'save': true,
-	            'select-note': true,
-	            'select-data': true,
-	            'select-error': true
-	        };
+	      if (nomatches.some(function (s) {
+	        return s === kvnd;
+	      })) {
+	        console.log("WARNING match/nomatch conflict for ".concat(kvnd));
+	        return;
+	      }
 
-	        var mode = context.mode();
-	        if (mode && !allowed[mode.id]) {
-	            context.enter(modeBrowse(context));
-	        }
+	      var match_kv = [parts.kv].concat(obj.matchTags || []).concat(["".concat(parts.k, "/yes"), "building/yes"]) // #3454 - match some generic tags
+	      .map(function (s) {
+	        return s.toLowerCase();
+	      });
+	      var match_nsimple = [];
 
-	        dispatch$1.call('drawn', this, {full: true});
-	    }
+	      if (which === 'primary') {
+	        match_nsimple = [parts.n].concat(obj.matchNames || []).concat(obj.tags.official_name || []) // #2732 - match alternate names
+	        .map(simplify);
+	      } else if (which === 'secondary') {
+	        match_nsimple = [].concat(obj.tags.alt_name || []) // #2732 - match alternate names
+	        .concat(obj.tags.short_name || []) // #2732 - match alternate names
+	        .map(simplify);
+	      }
 
+	      if (!match_nsimple.length) return; // nothing to do
 
+	      match_kv.forEach(function (kv) {
+	        match_nsimple.forEach(function (nsimple) {
+	          if (parts.d) {
+	            // Known ambiguous names with disambiguation string ~(USA) / ~(Canada)
+	            // FIXME: Name collisions will overwrite the initial entry (ok for now)
+	            if (!_ambiguous[kv]) _ambiguous[kv] = {};
+	            _ambiguous[kv][nsimple] = parts;
+	          } else {
+	            // Names we mostly expect to be unique..
+	            if (!_matchIndex[kv]) _matchIndex[kv] = {};
+	            var m = _matchIndex[kv][nsimple];
 
+	            if (m) {
+	              // There already is a match for this name, skip it
+	              // Warn if we detect collisions in a primary name.
+	              // Skip warning if a secondary name or a generic `*=yes` tag - #2972 / #3454
+	              if (which === 'primary' && !/\/yes$/.test(kv)) {
+	                _warnings.push([m.kvnd, "".concat(kvnd, " (").concat(kv, "/").concat(nsimple, ")")]);
+	              }
+	            } else {
+	              _matchIndex[kv][nsimple] = parts; // insert
+	            }
+	          }
+	        });
+	      });
+	    }
+	  }; // pass a `key`, `value`, `name` and return the best match,
+	  // `countryCode` optional (if supplied, must match that too)
 
 
-	    function gestureChange() {
-	        // Remap Safari gesture events to wheel events - #5492
-	        // We want these disabled most places, but enabled for zoom/unzoom on map surface
-	        // https://developer.mozilla.org/en-US/docs/Web/API/GestureEvent
-	        var e = event;
-	        e.preventDefault();
+	  matcher.matchKVN = function (key, value, name, countryCode) {
+	    return matcher.matchParts(to_parts("".concat(key, "/").concat(value, "|").concat(name)), countryCode);
+	  }; // pass a parts object and return the best match,
+	  // `countryCode` optional (if supplied, must match that too)
 
-	        var props = {
-	            deltaMode: 0,    // dummy values to ignore in zoomPan
-	            deltaY: 1,       // dummy values to ignore in zoomPan
-	            clientX: e.clientX,
-	            clientY: e.clientY,
-	            screenX: e.screenX,
-	            screenY: e.screenY,
-	            x: e.x,
-	            y: e.y
-	        };
 
-	        var e2 = new WheelEvent('wheel', props);
-	        e2._scale = e.scale;         // preserve the original scale
-	        e2._rotation = e.rotation;   // preserve the original rotation
-
-	        _selection.node().dispatchEvent(e2);
-	    }
-
-
-	    function zoomPan(manualEvent) {
-	        var event$1 = (manualEvent || event);
-	        var source = event$1.sourceEvent;
-	        var eventTransform = event$1.transform;
-	        var x = eventTransform.x;
-	        var y = eventTransform.y;
-	        var k = eventTransform.k;
-
-	        // Special handling of 'wheel' events:
-	        // They might be triggered by the user scrolling the mouse wheel,
-	        // or 2-finger pinch/zoom gestures, the transform may need adjustment.
-	        if (source && source.type === 'wheel') {
-
-	            // assume that the gesture is already handled by pointer events
-	            if (_pointerDown) { return; }
-
-	            var detected = utilDetect();
-	            var dX = source.deltaX;
-	            var dY = source.deltaY;
-	            var x2 = x;
-	            var y2 = y;
-	            var k2 = k;
-	            var t0, p0, p1;
-
-	            // Normalize mousewheel scroll speed (Firefox) - #3029
-	            // If wheel delta is provided in LINE units, recalculate it in PIXEL units
-	            // We are essentially redoing the calculations that occur here:
-	            //   https://github.com/d3/d3-zoom/blob/78563a8348aa4133b07cac92e2595c2227ca7cd7/src/zoom.js#L203
-	            // See this for more info:
-	            //   https://github.com/basilfx/normalize-wheel/blob/master/src/normalizeWheel.js
-	            if (source.deltaMode === 1 /* LINE */) {
-	                // Convert from lines to pixels, more if the user is scrolling fast.
-	                // (I made up the exp function to roughly match Firefox to what Chrome does)
-	                // These numbers should be floats, because integers are treated as pan gesture below.
-	                var lines = Math.abs(source.deltaY);
-	                var sign = (source.deltaY > 0) ? 1 : -1;
-	                dY = sign * clamp(
-	                    Math.exp((lines - 1) * 0.75) * 4.000244140625,
-	                    4.000244140625,    // min
-	                    350.000244140625   // max
-	                );
+	  matcher.matchParts = function (parts, countryCode) {
+	    var match = null;
+	    var inGroup = false; // fixme: we currently return a single match for ambiguous
 
-	                // On Firefox Windows and Linux we always get +/- the scroll line amount (default 3)
-	                // There doesn't seem to be any scroll accelleration.
-	                // This multiplier increases the speed a little bit - #5512
-	                if (detected.os !== 'mac') {
-	                    dY *= 5;
-	                }
+	    match = _ambiguous[parts.kv] && _ambiguous[parts.kv][parts.nsimple];
+	    if (match && matchesCountryCode(match)) return match; // try to return an exact match
 
-	                // recalculate x2,y2,k2
-	                t0 = _isTransformed ? _transformLast : _transformStart;
-	                p0 = _getMouseCoords(source);
-	                p1 = t0.invert(p0);
-	                k2 = t0.k * Math.pow(2, -dY / 500);
-	                k2 = clamp(k2, kMin, kMax);
-	                x2 = p0[0] - p1[0] * k2;
-	                y2 = p0[1] - p1[1] * k2;
-
-	            // 2 finger map pinch zooming (Safari) - #5492
-	            // These are fake `wheel` events we made from Safari `gesturechange` events..
-	            } else if (source._scale) {
-	                // recalculate x2,y2,k2
-	                t0 = _gestureTransformStart;
-	                p0 = _getMouseCoords(source);
-	                p1 = t0.invert(p0);
-	                k2 = t0.k * source._scale;
-	                k2 = clamp(k2, kMin, kMax);
-	                x2 = p0[0] - p1[0] * k2;
-	                y2 = p0[1] - p1[1] * k2;
-
-	            // 2 finger map pinch zooming (all browsers except Safari) - #5492
-	            // Pinch zooming via the `wheel` event will always have:
-	            // - `ctrlKey = true`
-	            // - `deltaY` is not round integer pixels (ignore `deltaX`)
-	            } else if (source.ctrlKey && !isInteger(dY)) {
-	                dY *= 6;   // slightly scale up whatever the browser gave us
-
-	                // recalculate x2,y2,k2
-	                t0 = _isTransformed ? _transformLast : _transformStart;
-	                p0 = _getMouseCoords(source);
-	                p1 = t0.invert(p0);
-	                k2 = t0.k * Math.pow(2, -dY / 500);
-	                k2 = clamp(k2, kMin, kMax);
-	                x2 = p0[0] - p1[0] * k2;
-	                y2 = p0[1] - p1[1] * k2;
-
-	            // Trackpad scroll zooming with shift or alt/option key down
-	            } else if ((source.altKey || source.shiftKey) && isInteger(dY)) {
-	                // recalculate x2,y2,k2
-	                t0 = _isTransformed ? _transformLast : _transformStart;
-	                p0 = _getMouseCoords(source);
-	                p1 = t0.invert(p0);
-	                k2 = t0.k * Math.pow(2, -dY / 500);
-	                k2 = clamp(k2, kMin, kMax);
-	                x2 = p0[0] - p1[0] * k2;
-	                y2 = p0[1] - p1[1] * k2;
-
-	            // 2 finger map panning (Mac only, all browsers) - #5492, #5512
-	            // Panning via the `wheel` event will always have:
-	            // - `ctrlKey = false`
-	            // - `deltaX`,`deltaY` are round integer pixels
-	            } else if (detected.os === 'mac' && !source.ctrlKey && isInteger(dX) && isInteger(dY)) {
-	                p1 = projection.translate();
-	                x2 = p1[0] - dX;
-	                y2 = p1[1] - dY;
-	                k2 = projection.scale();
-	                k2 = clamp(k2, kMin, kMax);
-	            }
+	    match = _matchIndex[parts.kv] && _matchIndex[parts.kv][parts.nsimple];
+	    if (match && matchesCountryCode(match)) return match; // look in match groups
 
-	            // something changed - replace the event transform
-	            if (x2 !== x || y2 !== y || k2 !== k) {
-	                x = x2;
-	                y = y2;
-	                k = k2;
-	                eventTransform = identity$2.translate(x2, y2).scale(k2);
-	                if (_zoomerPanner._transform) {
-	                    // utilZoomPan interface
-	                    _zoomerPanner._transform(eventTransform);
-	                } else {
-	                    // d3_zoom interface
-	                    _selection.node().__zoom = eventTransform;
-	                }
-	            }
+	    for (var mg in matchGroups$1) {
+	      var matchGroup = matchGroups$1[mg];
+	      match = null;
+	      inGroup = false;
 
-	        }
+	      for (var i = 0; i < matchGroup.length; i++) {
+	        var otherkv = matchGroup[i].toLowerCase();
 
-	        if (_transformStart.x === x &&
-	            _transformStart.y === y &&
-	            _transformStart.k === k) {
-	            return;  // no change
+	        if (!inGroup) {
+	          inGroup = otherkv === parts.kv;
 	        }
 
-	        var withinEditableZoom = map.withinEditableZoom();
-	        if (_lastWithinEditableZoom !== withinEditableZoom) {
-	            if (_lastWithinEditableZoom !== undefined) {
-	                // notify that the map zoomed in or out over the editable zoom threshold
-	                dispatch$1.call('crossEditableZoom', this, withinEditableZoom);
-	            }
-	            _lastWithinEditableZoom = withinEditableZoom;
+	        if (!match) {
+	          // fixme: we currently return a single match for ambiguous
+	          match = _ambiguous[otherkv] && _ambiguous[otherkv][parts.nsimple];
 	        }
 
-	        if (geoScaleToZoom(k, TILESIZE) < _minzoom) {
-	            surface.interrupt();
-	            dispatch$1.call('hitMinZoom', this, map);
-	            setCenterZoom(map.center(), context.minEditableZoom(), 0, true);
-	            scheduleRedraw();
-	            dispatch$1.call('move', this, map);
-	            return;
+	        if (!match) {
+	          match = _matchIndex[otherkv] && _matchIndex[otherkv][parts.nsimple];
 	        }
 
-	        projection.transform(eventTransform);
-
-	        var scale = k / _transformStart.k;
-	        var tX = (x / scale - _transformStart.x) * scale;
-	        var tY = (y / scale - _transformStart.y) * scale;
-
-	        if (context.inIntro()) {
-	            curtainProjection.transform({
-	                x: x - tX,
-	                y: y - tY,
-	                k: k
-	            });
+	        if (match && !matchesCountryCode(match)) {
+	          match = null;
 	        }
 
-	        if (source) {
-	            _lastPointerEvent = event$1;
+	        if (inGroup && match) {
+	          return match;
 	        }
-	        _isTransformed = true;
-	        _transformLast = eventTransform;
-	        utilSetTransform(supersurface, tX, tY, scale);
-	        scheduleRedraw();
-
-	        dispatch$1.call('move', this, map);
+	      }
+	    }
 
+	    return null;
 
-	        function isInteger(val) {
-	            return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
-	        }
+	    function matchesCountryCode(match) {
+	      if (!countryCode) return true;
+	      if (!match.countryCodes) return true;
+	      return match.countryCodes.indexOf(countryCode) !== -1;
 	    }
+	  };
 
+	  matcher.getWarnings = function () {
+	    return _warnings;
+	  };
 
-	    function resetTransform() {
-	        if (!_isTransformed) { return false; }
+	  return matcher;
+	};
 
-	        utilSetTransform(supersurface, 0, 0);
-	        _isTransformed = false;
-	        if (context.inIntro()) {
-	            curtainProjection.transform(projection.transform());
-	        }
-	        return true;
-	    }
+	var fromCharCode = String.fromCharCode;
+	var nativeFromCodePoint = String.fromCodePoint;
 
+	// length should be 1, old FF problem
+	var INCORRECT_LENGTH = !!nativeFromCodePoint && nativeFromCodePoint.length != 1;
 
-	    function redraw(difference, extent) {
-	        if (surface.empty() || !_redrawEnabled) { return; }
+	// `String.fromCodePoint` method
+	// https://tc39.github.io/ecma262/#sec-string.fromcodepoint
+	_export({ target: 'String', stat: true, forced: INCORRECT_LENGTH }, {
+	  fromCodePoint: function fromCodePoint(x) { // eslint-disable-line no-unused-vars
+	    var elements = [];
+	    var length = arguments.length;
+	    var i = 0;
+	    var code;
+	    while (length > i) {
+	      code = +arguments[i++];
+	      if (toAbsoluteIndex(code, 0x10FFFF) !== code) throw RangeError(code + ' is not a valid code point');
+	      elements.push(code < 0x10000
+	        ? fromCharCode(code)
+	        : fromCharCode(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00)
+	      );
+	    } return elements.join('');
+	  }
+	});
 
-	        // If we are in the middle of a zoom/pan, we can't do differenced redraws.
-	        // It would result in artifacts where differenced entities are redrawn with
-	        // one transform and unchanged entities with another.
-	        if (resetTransform()) {
-	            difference = extent = undefined;
-	        }
+	var quickselect$2 = createCommonjsModule(function (module, exports) {
+	  (function (global, factory) {
+	     module.exports = factory() ;
+	  })(commonjsGlobal, function () {
 
-	        var zoom = map.zoom();
-	        var z = String(~~zoom);
+	    function quickselect(arr, k, left, right, compare) {
+	      quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+	    }
 
-	        if (surface.attr('data-zoom') !== z) {
-	            surface.attr('data-zoom', z);
+	    function quickselectStep(arr, k, left, right, compare) {
+	      while (right > left) {
+	        if (right - left > 600) {
+	          var n = right - left + 1;
+	          var m = k - left + 1;
+	          var z = Math.log(n);
+	          var s = 0.5 * Math.exp(2 * z / 3);
+	          var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+	          var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+	          var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+	          quickselectStep(arr, k, newLeft, newRight, compare);
 	        }
 
-	        // class surface as `lowzoom` around z17-z18.5 (based on latitude)
-	        var lat = map.center()[1];
-	        var lowzoom = linear$2()
-	            .domain([-60, 0, 60])
-	            .range([17, 18.5, 17])
-	            .clamp(true);
+	        var t = arr[k];
+	        var i = left;
+	        var j = right;
+	        swap(arr, left, k);
+	        if (compare(arr[right], t) > 0) swap(arr, left, right);
 
-	        surface
-	            .classed('low-zoom', zoom <= lowzoom(lat));
+	        while (i < j) {
+	          swap(arr, i, j);
+	          i++;
+	          j--;
 
+	          while (compare(arr[i], t) < 0) {
+	            i++;
+	          }
 
-	        if (!difference) {
-	            supersurface.call(context.background());
-	            wrapper.call(drawLayers);
+	          while (compare(arr[j], t) > 0) {
+	            j--;
+	          }
 	        }
 
-	        // OSM
-	        if (map.editableDataEnabled() || map.isInWideSelection()) {
-	            context.loadTiles(projection);
-	            drawEditable(difference, extent);
-	        } else {
-	            editOff();
+	        if (compare(arr[left], t) === 0) swap(arr, left, j);else {
+	          j++;
+	          swap(arr, j, right);
 	        }
+	        if (j <= k) left = j + 1;
+	        if (k <= j) right = j - 1;
+	      }
+	    }
 
-	        _transformStart = projection.transform();
+	    function swap(arr, i, j) {
+	      var tmp = arr[i];
+	      arr[i] = arr[j];
+	      arr[j] = tmp;
+	    }
 
-	        return map;
+	    function defaultCompare(a, b) {
+	      return a < b ? -1 : a > b ? 1 : 0;
 	    }
 
+	    return quickselect;
+	  });
+	});
 
+	var rbush_1 = rbush;
+	var _default$2 = rbush;
 
-	    var immediateRedraw = function(difference, extent) {
-	        if (!difference && !extent) { cancelPendingRedraw(); }
-	        redraw(difference, extent);
-	    };
+	function rbush(maxEntries, format) {
+	  if (!(this instanceof rbush)) return new rbush(maxEntries, format); // max entries in a node is 9 by default; min node fill is 40% for best performance
 
+	  this._maxEntries = Math.max(4, maxEntries || 9);
+	  this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
 
-	    map.lastPointerEvent = function() {
-	        return _lastPointerEvent;
-	    };
+	  if (format) {
+	    this._initFormat(format);
+	  }
+
+	  this.clear();
+	}
+
+	rbush.prototype = {
+	  all: function all() {
+	    return this._all(this.data, []);
+	  },
+	  search: function search(bbox) {
+	    var node = this.data,
+	        result = [],
+	        toBBox = this.toBBox;
+	    if (!intersects$1(bbox, node)) return result;
+	    var nodesToSearch = [],
+	        i,
+	        len,
+	        child,
+	        childBBox;
 
+	    while (node) {
+	      for (i = 0, len = node.children.length; i < len; i++) {
+	        child = node.children[i];
+	        childBBox = node.leaf ? toBBox(child) : child;
 
-	    map.mouse = function() {
-	        var event$1 = _lastPointerEvent || event;
-	        if (event$1) {
-	            var s;
-	            while ((s = event$1.sourceEvent)) { event$1 = s; }
-	            return _getMouseCoords(event$1);
+	        if (intersects$1(bbox, childBBox)) {
+	          if (node.leaf) result.push(child);else if (contains$1(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
 	        }
-	        return null;
-	    };
+	      }
 
+	      node = nodesToSearch.pop();
+	    }
 
-	    // returns Lng/Lat
-	    map.mouseCoordinates = function() {
-	        var coord = map.mouse() || pxCenter();
-	        return projection.invert(coord);
-	    };
+	    return result;
+	  },
+	  collides: function collides(bbox) {
+	    var node = this.data,
+	        toBBox = this.toBBox;
+	    if (!intersects$1(bbox, node)) return false;
+	    var nodesToSearch = [],
+	        i,
+	        len,
+	        child,
+	        childBBox;
 
+	    while (node) {
+	      for (i = 0, len = node.children.length; i < len; i++) {
+	        child = node.children[i];
+	        childBBox = node.leaf ? toBBox(child) : child;
 
-	    map.dblclickZoomEnable = function(val) {
-	        if (!arguments.length) { return _dblClickZoomEnabled; }
-	        _dblClickZoomEnabled = val;
-	        return map;
-	    };
+	        if (intersects$1(bbox, childBBox)) {
+	          if (node.leaf || contains$1(bbox, childBBox)) return true;
+	          nodesToSearch.push(child);
+	        }
+	      }
 
+	      node = nodesToSearch.pop();
+	    }
 
-	    map.redrawEnable = function(val) {
-	        if (!arguments.length) { return _redrawEnabled; }
-	        _redrawEnabled = val;
-	        return map;
-	    };
+	    return false;
+	  },
+	  load: function load(data) {
+	    if (!(data && data.length)) return this;
 
+	    if (data.length < this._minEntries) {
+	      for (var i = 0, len = data.length; i < len; i++) {
+	        this.insert(data[i]);
+	      }
 
-	    map.isTransformed = function() {
-	        return _isTransformed;
-	    };
+	      return this;
+	    } // recursively build the tree with the given data from scratch using OMT algorithm
 
 
-	    function setTransform(t2, duration, force) {
-	        var t = projection.transform();
-	        if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) { return false; }
+	    var node = this._build(data.slice(), 0, data.length - 1, 0);
 
-	        if (duration) {
-	            _selection
-	                .transition()
-	                .duration(duration)
-	                .on('start', function() { map.startEase(); })
-	                .call(_zoomerPanner.transform, identity$2.translate(t2.x, t2.y).scale(t2.k));
-	        } else {
-	            projection.transform(t2);
-	            _transformStart = t2;
-	            _selection.call(_zoomerPanner.transform, _transformStart);
-	        }
+	    if (!this.data.children.length) {
+	      // save as is if tree is empty
+	      this.data = node;
+	    } else if (this.data.height === node.height) {
+	      // split root if trees have the same height
+	      this._splitRoot(this.data, node);
+	    } else {
+	      if (this.data.height < node.height) {
+	        // swap trees if inserted one is bigger
+	        var tmpNode = this.data;
+	        this.data = node;
+	        node = tmpNode;
+	      } // insert the small tree into the large tree at appropriate level
 
-	        return true;
+
+	      this._insert(node, this.data.height - node.height - 1, true);
 	    }
 
+	    return this;
+	  },
+	  insert: function insert(item) {
+	    if (item) this._insert(item, this.data.height - 1);
+	    return this;
+	  },
+	  clear: function clear() {
+	    this.data = createNode$1([]);
+	    return this;
+	  },
+	  remove: function remove(item, equalsFn) {
+	    if (!item) return this;
+	    var node = this.data,
+	        bbox = this.toBBox(item),
+	        path = [],
+	        indexes = [],
+	        i,
+	        parent,
+	        index,
+	        goingUp; // depth-first iterative tree traversal
+
+	    while (node || path.length) {
+	      if (!node) {
+	        // go up
+	        node = path.pop();
+	        parent = path[path.length - 1];
+	        i = indexes.pop();
+	        goingUp = true;
+	      }
 
-	    function setCenterZoom(loc2, z2, duration, force) {
-	        var c = map.center();
-	        var z = map.zoom();
-	        if (loc2[0] === c[0] && loc2[1] === c[1] && z2 === z && !force) { return false; }
+	      if (node.leaf) {
+	        // check current node
+	        index = findItem$1(item, node.children, equalsFn);
 
-	        var proj = geoRawMercator().transform(projection.transform());  // copy projection
+	        if (index !== -1) {
+	          // item found, remove the item and condense tree upwards
+	          node.children.splice(index, 1);
+	          path.push(node);
 
-	        var k2 = clamp(geoZoomToScale(z2, TILESIZE), kMin, kMax);
-	        proj.scale(k2);
+	          this._condense(path);
 
-	        var t = proj.translate();
-	        var point = proj(loc2);
+	          return this;
+	        }
+	      }
 
-	        var center = pxCenter();
-	        t[0] += center[0] - point[0];
-	        t[1] += center[1] - point[1];
+	      if (!goingUp && !node.leaf && contains$1(node, bbox)) {
+	        // go down
+	        path.push(node);
+	        indexes.push(i);
+	        i = 0;
+	        parent = node;
+	        node = node.children[0];
+	      } else if (parent) {
+	        // go right
+	        i++;
+	        node = parent.children[i];
+	        goingUp = false;
+	      } else node = null; // nothing found
 
-	        return setTransform(identity$2.translate(t[0], t[1]).scale(k2), duration, force);
 	    }
 
+	    return this;
+	  },
+	  toBBox: function toBBox(item) {
+	    return item;
+	  },
+	  compareMinX: compareNodeMinX$1,
+	  compareMinY: compareNodeMinY$1,
+	  toJSON: function toJSON() {
+	    return this.data;
+	  },
+	  fromJSON: function fromJSON(data) {
+	    this.data = data;
+	    return this;
+	  },
+	  _all: function _all(node, result) {
+	    var nodesToSearch = [];
 
-	    map.pan = function(delta, duration) {
-	        var t = projection.translate();
-	        var k = projection.scale();
-
-	        t[0] += delta[0];
-	        t[1] += delta[1];
+	    while (node) {
+	      if (node.leaf) result.push.apply(result, node.children);else nodesToSearch.push.apply(nodesToSearch, node.children);
+	      node = nodesToSearch.pop();
+	    }
 
-	        if (duration) {
-	            _selection
-	                .transition()
-	                .duration(duration)
-	                .on('start', function() { map.startEase(); })
-	                .call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
-	        } else {
-	            projection.translate(t);
-	            _transformStart = projection.transform();
-	            _selection.call(_zoomerPanner.transform, _transformStart);
-	            dispatch$1.call('move', this, map);
-	            immediateRedraw();
-	        }
+	    return result;
+	  },
+	  _build: function _build(items, left, right, height) {
+	    var N = right - left + 1,
+	        M = this._maxEntries,
+	        node;
 
-	        return map;
-	    };
+	    if (N <= M) {
+	      // reached leaf level; return leaf
+	      node = createNode$1(items.slice(left, right + 1));
+	      calcBBox$1(node, this.toBBox);
+	      return node;
+	    }
 
+	    if (!height) {
+	      // target height of the bulk-loaded tree
+	      height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization
 
-	    map.dimensions = function(val) {
-	        if (!arguments.length) { return _dimensions; }
+	      M = Math.ceil(N / Math.pow(M, height - 1));
+	    }
 
-	        _dimensions = val;
-	        drawLayers.dimensions(_dimensions);
-	        context.background().dimensions(_dimensions);
-	        projection.clipExtent([[0, 0], _dimensions]);
-	        _getMouseCoords = utilFastMouse(supersurface.node());
+	    node = createNode$1([]);
+	    node.leaf = false;
+	    node.height = height; // split the items into M mostly square tiles
 
-	        scheduleRedraw();
-	        return map;
-	    };
+	    var N2 = Math.ceil(N / M),
+	        N1 = N2 * Math.ceil(Math.sqrt(M)),
+	        i,
+	        j,
+	        right2,
+	        right3;
+	    multiSelect$1(items, left, right, N1, this.compareMinX);
 
+	    for (i = left; i <= right; i += N1) {
+	      right2 = Math.min(i + N1 - 1, right);
+	      multiSelect$1(items, i, right2, N2, this.compareMinY);
 
-	    function zoomIn(delta) {
-	        setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
-	    }
+	      for (j = i; j <= right2; j += N2) {
+	        right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
-	    function zoomOut(delta) {
-	        setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
+	        node.children.push(this._build(items, j, right3, height - 1));
+	      }
 	    }
 
-	    map.zoomIn = function() { zoomIn(1); };
-	    map.zoomInFurther = function() { zoomIn(4); };
-	    map.canZoomIn = function() { return map.zoom() < maxZoom; };
-
-	    map.zoomOut = function() { zoomOut(1); };
-	    map.zoomOutFurther = function() { zoomOut(4); };
-	    map.canZoomOut = function() { return map.zoom() > minZoom; };
+	    calcBBox$1(node, this.toBBox);
+	    return node;
+	  },
+	  _chooseSubtree: function _chooseSubtree(bbox, node, level, path) {
+	    var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
 
-	    map.center = function(loc2) {
-	        if (!arguments.length) {
-	            return projection.invert(pxCenter());
-	        }
+	    while (true) {
+	      path.push(node);
+	      if (node.leaf || path.length - 1 === level) break;
+	      minArea = minEnlargement = Infinity;
 
-	        if (setCenterZoom(loc2, map.zoom())) {
-	            dispatch$1.call('move', this, map);
+	      for (i = 0, len = node.children.length; i < len; i++) {
+	        child = node.children[i];
+	        area = bboxArea$1(child);
+	        enlargement = enlargedArea$1(bbox, child) - area; // choose entry with the least area enlargement
+
+	        if (enlargement < minEnlargement) {
+	          minEnlargement = enlargement;
+	          minArea = area < minArea ? area : minArea;
+	          targetNode = child;
+	        } else if (enlargement === minEnlargement) {
+	          // otherwise choose one with the smallest area
+	          if (area < minArea) {
+	            minArea = area;
+	            targetNode = child;
+	          }
 	        }
+	      }
 
-	        scheduleRedraw();
-	        return map;
-	    };
+	      node = targetNode || node.children[0];
+	    }
 
-	    map.unobscuredCenterZoomEase = function(loc, zoom) {
-	        var offset = map.unobscuredOffsetPx();
+	    return node;
+	  },
+	  _insert: function _insert(item, level, isNode) {
+	    var toBBox = this.toBBox,
+	        bbox = isNode ? item : toBBox(item),
+	        insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too
 
-	        var proj = geoRawMercator().transform(projection.transform());  // copy projection
-	        // use the target zoom to calculate the offset center
-	        proj.scale(geoZoomToScale(zoom, TILESIZE));
+	    var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
-	        var locPx = proj(loc);
-	        var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
-	        var offsetLoc = proj.invert(offsetLocPx);
 
-	        map.centerZoomEase(offsetLoc, zoom);
-	    };
+	    node.children.push(item);
+	    extend$3(node, bbox); // split on node overflow; propagate upwards if necessary
 
-	    map.unobscuredOffsetPx = function() {
-	        var openPane = context.container().select('.map-panes .map-pane.shown');
-	        if (!openPane.empty()) {
-	            return [openPane.node().offsetWidth/2, 0];
-	        }
-	        return [0, 0];
-	    };
+	    while (level >= 0) {
+	      if (insertPath[level].children.length > this._maxEntries) {
+	        this._split(insertPath, level);
 
-	    map.zoom = function(z2) {
-	        if (!arguments.length) {
-	            return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
-	        }
+	        level--;
+	      } else break;
+	    } // adjust bboxes along the insertion path
 
-	        if (z2 < _minzoom) {
-	            surface.interrupt();
-	            dispatch$1.call('hitMinZoom', this, map);
-	            z2 = context.minEditableZoom();
-	        }
 
-	        if (setCenterZoom(map.center(), z2)) {
-	            dispatch$1.call('move', this, map);
-	        }
+	    this._adjustParentBBoxes(bbox, insertPath, level);
+	  },
+	  // split overflowed node into two
+	  _split: function _split(insertPath, level) {
+	    var node = insertPath[level],
+	        M = node.children.length,
+	        m = this._minEntries;
 
-	        scheduleRedraw();
-	        return map;
-	    };
+	    this._chooseSplitAxis(node, m, M);
 
+	    var splitIndex = this._chooseSplitIndex(node, m, M);
 
-	    map.centerZoom = function(loc2, z2) {
-	        if (setCenterZoom(loc2, z2)) {
-	            dispatch$1.call('move', this, map);
+	    var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
+	    newNode.height = node.height;
+	    newNode.leaf = node.leaf;
+	    calcBBox$1(node, this.toBBox);
+	    calcBBox$1(newNode, this.toBBox);
+	    if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
+	  },
+	  _splitRoot: function _splitRoot(node, newNode) {
+	    // split root node
+	    this.data = createNode$1([node, newNode]);
+	    this.data.height = node.height + 1;
+	    this.data.leaf = false;
+	    calcBBox$1(this.data, this.toBBox);
+	  },
+	  _chooseSplitIndex: function _chooseSplitIndex(node, m, M) {
+	    var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
+	    minOverlap = minArea = Infinity;
+
+	    for (i = m; i <= M - m; i++) {
+	      bbox1 = distBBox$1(node, 0, i, this.toBBox);
+	      bbox2 = distBBox$1(node, i, M, this.toBBox);
+	      overlap = intersectionArea$1(bbox1, bbox2);
+	      area = bboxArea$1(bbox1) + bboxArea$1(bbox2); // choose distribution with minimum overlap
+
+	      if (overlap < minOverlap) {
+	        minOverlap = overlap;
+	        index = i;
+	        minArea = area < minArea ? area : minArea;
+	      } else if (overlap === minOverlap) {
+	        // otherwise choose distribution with minimum area
+	        if (area < minArea) {
+	          minArea = area;
+	          index = i;
 	        }
+	      }
+	    }
 
-	        scheduleRedraw();
-	        return map;
-	    };
+	    return index;
+	  },
+	  // sorts node children by the best axis for split
+	  _chooseSplitAxis: function _chooseSplitAxis(node, m, M) {
+	    var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX$1,
+	        compareMinY = node.leaf ? this.compareMinY : compareNodeMinY$1,
+	        xMargin = this._allDistMargin(node, m, M, compareMinX),
+	        yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
+	    // otherwise it's already sorted by minY
 
 
-	    map.zoomTo = function(entity) {
-	        var extent = entity.extent(context.graph());
-	        if (!isFinite(extent.area())) { return map; }
+	    if (xMargin < yMargin) node.children.sort(compareMinX);
+	  },
+	  // total margin of all possible split distributions where each node is at least m full
+	  _allDistMargin: function _allDistMargin(node, m, M, compare) {
+	    node.children.sort(compare);
+	    var toBBox = this.toBBox,
+	        leftBBox = distBBox$1(node, 0, m, toBBox),
+	        rightBBox = distBBox$1(node, M - m, M, toBBox),
+	        margin = bboxMargin$1(leftBBox) + bboxMargin$1(rightBBox),
+	        i,
+	        child;
 
-	        var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-	        return map.centerZoom(extent.center(), z2);
-	    };
+	    for (i = m; i < M - m; i++) {
+	      child = node.children[i];
+	      extend$3(leftBBox, node.leaf ? toBBox(child) : child);
+	      margin += bboxMargin$1(leftBBox);
+	    }
 
+	    for (i = M - m - 1; i >= m; i--) {
+	      child = node.children[i];
+	      extend$3(rightBBox, node.leaf ? toBBox(child) : child);
+	      margin += bboxMargin$1(rightBBox);
+	    }
 
-	    map.centerEase = function(loc2, duration) {
-	        duration = duration || 250;
-	        setCenterZoom(loc2, map.zoom(), duration);
-	        return map;
-	    };
+	    return margin;
+	  },
+	  _adjustParentBBoxes: function _adjustParentBBoxes(bbox, path, level) {
+	    // adjust bboxes along the given tree path
+	    for (var i = level; i >= 0; i--) {
+	      extend$3(path[i], bbox);
+	    }
+	  },
+	  _condense: function _condense(path) {
+	    // go through the path, removing empty nodes and updating bboxes
+	    for (var i = path.length - 1, siblings; i >= 0; i--) {
+	      if (path[i].children.length === 0) {
+	        if (i > 0) {
+	          siblings = path[i - 1].children;
+	          siblings.splice(siblings.indexOf(path[i]), 1);
+	        } else this.clear();
+	      } else calcBBox$1(path[i], this.toBBox);
+	    }
+	  },
+	  _initFormat: function _initFormat(format) {
+	    // data format (minX, minY, maxX, maxY accessors)
+	    // uses eval-type function compilation instead of just accepting a toBBox function
+	    // because the algorithms are very sensitive to sorting functions performance,
+	    // so they should be dead simple and without inner calls
+	    var compareArr = ['return a', ' - b', ';'];
+	    this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));
+	    this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));
+	    this.toBBox = new Function('a', 'return {minX: a' + format[0] + ', minY: a' + format[1] + ', maxX: a' + format[2] + ', maxY: a' + format[3] + '};');
+	  }
+	};
 
+	function findItem$1(item, items, equalsFn) {
+	  if (!equalsFn) return items.indexOf(item);
 
-	    map.zoomEase = function(z2, duration) {
-	        duration = duration || 250;
-	        setCenterZoom(map.center(), z2, duration, false);
-	        return map;
-	    };
+	  for (var i = 0; i < items.length; i++) {
+	    if (equalsFn(item, items[i])) return i;
+	  }
 
+	  return -1;
+	} // calculate node's bbox from bboxes of its children
 
-	    map.centerZoomEase = function(loc2, z2, duration) {
-	        duration = duration || 250;
-	        setCenterZoom(loc2, z2, duration, false);
-	        return map;
-	    };
 
+	function calcBBox$1(node, toBBox) {
+	  distBBox$1(node, 0, node.children.length, toBBox, node);
+	} // min bounding rectangle of node children from k to p-1
 
-	    map.transformEase = function(t2, duration) {
-	        duration = duration || 250;
-	        setTransform(t2, duration, false /* don't force */);
-	        return map;
-	    };
 
+	function distBBox$1(node, k, p, toBBox, destNode) {
+	  if (!destNode) destNode = createNode$1(null);
+	  destNode.minX = Infinity;
+	  destNode.minY = Infinity;
+	  destNode.maxX = -Infinity;
+	  destNode.maxY = -Infinity;
 
-	    map.zoomToEase = function(obj, duration) {
-	        var extent;
-	        if (Array.isArray(obj)) {
-	            obj.forEach(function(entity) {
-	                var entityExtent = entity.extent(context.graph());
-	                if (!extent) {
-	                    extent = entityExtent;
-	                } else {
-	                    extent = extent.extend(entityExtent);
-	                }
-	            });
-	        } else {
-	            extent = obj.extent(context.graph());
-	        }
-	        if (!isFinite(extent.area())) { return map; }
+	  for (var i = k, child; i < p; i++) {
+	    child = node.children[i];
+	    extend$3(destNode, node.leaf ? toBBox(child) : child);
+	  }
 
-	        var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-	        return map.centerZoomEase(extent.center(), z2, duration);
-	    };
+	  return destNode;
+	}
 
+	function extend$3(a, b) {
+	  a.minX = Math.min(a.minX, b.minX);
+	  a.minY = Math.min(a.minY, b.minY);
+	  a.maxX = Math.max(a.maxX, b.maxX);
+	  a.maxY = Math.max(a.maxY, b.maxY);
+	  return a;
+	}
 
-	    map.startEase = function() {
-	        utilBindOnce(surface, _pointerPrefix + 'down.ease', function() {
-	            map.cancelEase();
-	        });
-	        return map;
-	    };
+	function compareNodeMinX$1(a, b) {
+	  return a.minX - b.minX;
+	}
 
+	function compareNodeMinY$1(a, b) {
+	  return a.minY - b.minY;
+	}
 
-	    map.cancelEase = function() {
-	        _selection.interrupt();
-	        return map;
-	    };
+	function bboxArea$1(a) {
+	  return (a.maxX - a.minX) * (a.maxY - a.minY);
+	}
 
+	function bboxMargin$1(a) {
+	  return a.maxX - a.minX + (a.maxY - a.minY);
+	}
 
-	    map.extent = function(val) {
-	        if (!arguments.length) {
-	            return new geoExtent(
-	                projection.invert([0, _dimensions[1]]),
-	                projection.invert([_dimensions[0], 0])
-	            );
-	        } else {
-	            var extent = geoExtent(val);
-	            map.centerZoom(extent.center(), map.extentZoom(extent));
-	        }
-	    };
+	function enlargedArea$1(a, b) {
+	  return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
+	}
 
+	function intersectionArea$1(a, b) {
+	  var minX = Math.max(a.minX, b.minX),
+	      minY = Math.max(a.minY, b.minY),
+	      maxX = Math.min(a.maxX, b.maxX),
+	      maxY = Math.min(a.maxY, b.maxY);
+	  return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
+	}
 
-	    map.trimmedExtent = function(val) {
-	        if (!arguments.length) {
-	            var headerY = 71;
-	            var footerY = 30;
-	            var pad = 10;
-	            return new geoExtent(
-	                projection.invert([pad, _dimensions[1] - footerY - pad]),
-	                projection.invert([_dimensions[0] - pad, headerY + pad])
-	            );
-	        } else {
-	            var extent = geoExtent(val);
-	            map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
-	        }
-	    };
+	function contains$1(a, b) {
+	  return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+	}
 
+	function intersects$1(a, b) {
+	  return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+	}
 
-	    function calcExtentZoom(extent, dim) {
-	        var tl = projection([extent[0][0], extent[1][1]]);
-	        var br = projection([extent[1][0], extent[0][1]]);
+	function createNode$1(children) {
+	  return {
+	    children: children,
+	    height: 1,
+	    leaf: true,
+	    minX: Infinity,
+	    minY: Infinity,
+	    maxX: -Infinity,
+	    maxY: -Infinity
+	  };
+	} // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
+	// combines selection algorithm with binary divide & conquer approach
 
-	        // Calculate maximum zoom that fits extent
-	        var hFactor = (br[0] - tl[0]) / dim[0];
-	        var vFactor = (br[1] - tl[1]) / dim[1];
-	        var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
-	        var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
-	        var newZoom = map.zoom() - Math.max(hZoomDiff, vZoomDiff);
 
-	        return newZoom;
-	    }
+	function multiSelect$1(arr, left, right, n, compare) {
+	  var stack = [left, right],
+	      mid;
 
+	  while (stack.length) {
+	    right = stack.pop();
+	    left = stack.pop();
+	    if (right - left <= n) continue;
+	    mid = left + Math.ceil((right - left) / n / 2) * n;
+	    quickselect$2(arr, mid, left, right, compare);
+	    stack.push(left, mid, mid, right);
+	  }
+	}
+	rbush_1["default"] = _default$2;
 
-	    map.extentZoom = function(val) {
-	        return calcExtentZoom(geoExtent(val), _dimensions);
-	    };
+	var lineclip_1$1 = lineclip$1;
+	lineclip$1.polyline = lineclip$1;
+	lineclip$1.polygon = polygonclip$1; // Cohen-Sutherland line clippign algorithm, adapted to efficiently
+	// handle polylines rather than just segments
+
+	function lineclip$1(points, bbox, result) {
+	  var len = points.length,
+	      codeA = bitCode$1(points[0], bbox),
+	      part = [],
+	      i,
+	      a,
+	      b,
+	      codeB,
+	      lastCode;
+	  if (!result) result = [];
 
+	  for (i = 1; i < len; i++) {
+	    a = points[i - 1];
+	    b = points[i];
+	    codeB = lastCode = bitCode$1(b, bbox);
 
-	    map.trimmedExtentZoom = function(val) {
-	        var trimY = 120;
-	        var trimX = 40;
-	        var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
-	        return calcExtentZoom(geoExtent(val), trimmed);
-	    };
+	    while (true) {
+	      if (!(codeA | codeB)) {
+	        // accept
+	        part.push(a);
+
+	        if (codeB !== lastCode) {
+	          // segment went outside
+	          part.push(b);
+
+	          if (i < len - 1) {
+	            // start a new line
+	            result.push(part);
+	            part = [];
+	          }
+	        } else if (i === len - 1) {
+	          part.push(b);
+	        }
 
+	        break;
+	      } else if (codeA & codeB) {
+	        // trivial reject
+	        break;
+	      } else if (codeA) {
+	        // a outside, intersect with clip edge
+	        a = intersect$1(a, b, codeA, bbox);
+	        codeA = bitCode$1(a, bbox);
+	      } else {
+	        // b outside
+	        b = intersect$1(a, b, codeB, bbox);
+	        codeB = bitCode$1(b, bbox);
+	      }
+	    }
 
-	    map.withinEditableZoom = function() {
-	        return map.zoom() >= context.minEditableZoom();
-	    };
+	    codeA = lastCode;
+	  }
 
+	  if (part.length) result.push(part);
+	  return result;
+	} // Sutherland-Hodgeman polygon clipping algorithm
 
-	    map.isInWideSelection = function() {
-	        return !map.withinEditableZoom() && context.selectedIDs().length;
-	    };
 
+	function polygonclip$1(points, bbox) {
+	  var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
-	    map.editableDataEnabled = function(skipZoomCheck) {
+	  for (edge = 1; edge <= 8; edge *= 2) {
+	    result = [];
+	    prev = points[points.length - 1];
+	    prevInside = !(bitCode$1(prev, bbox) & edge);
 
-	        var layer = context.layers().layer('osm');
-	        if (!layer || !layer.enabled()) { return false; }
+	    for (i = 0; i < points.length; i++) {
+	      p = points[i];
+	      inside = !(bitCode$1(p, bbox) & edge); // if segment goes through the clip window, add an intersection
 
-	        return skipZoomCheck || map.withinEditableZoom();
-	    };
+	      if (inside !== prevInside) result.push(intersect$1(prev, p, edge, bbox));
+	      if (inside) result.push(p); // add a point if it's inside
 
+	      prev = p;
+	      prevInside = inside;
+	    }
 
-	    map.notesEditable = function() {
-	        var layer = context.layers().layer('notes');
-	        if (!layer || !layer.enabled()) { return false; }
+	    points = result;
+	    if (!points.length) break;
+	  }
 
-	        return map.withinEditableZoom();
-	    };
+	  return result;
+	} // intersect a segment against one of the 4 lines that make up the bbox
 
 
-	    map.minzoom = function(val) {
-	        if (!arguments.length) { return _minzoom; }
-	        _minzoom = val;
-	        return map;
-	    };
+	function intersect$1(a, b, edge, bbox) {
+	  return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
+	  edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
+	  edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
+	  edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
+	  null;
+	} // bit code reflects the point position relative to the bbox:
+	//         left  mid  right
+	//    top  1001  1000  1010
+	//    mid  0001  0000  0010
+	// bottom  0101  0100  0110
 
 
-	    map.toggleHighlightEdited = function() {
-	        surface.classed('highlight-edited', !surface.classed('highlight-edited'));
-	        map.pan([0,0]);  // trigger a redraw
-	        dispatch$1.call('changeHighlighting', this);
-	    };
+	function bitCode$1(p, bbox) {
+	  var code = 0;
+	  if (p[0] < bbox[0]) code |= 1; // left
+	  else if (p[0] > bbox[2]) code |= 2; // right
 
+	  if (p[1] < bbox[1]) code |= 4; // bottom
+	  else if (p[1] > bbox[3]) code |= 8; // top
 
-	    map.areaFillOptions = ['wireframe', 'partial', 'full'];
+	  return code;
+	}
 
-	    map.activeAreaFill = function(val) {
-	        if (!arguments.length) { return corePreferences('area-fill') || 'partial'; }
+	var whichPolygon_1 = whichPolygon;
 
-	        corePreferences('area-fill', val);
-	        if (val !== 'wireframe') {
-	            corePreferences('area-fill-toggle', val);
-	        }
-	        updateAreaFill();
-	        map.pan([0,0]);  // trigger a redraw
-	        dispatch$1.call('changeAreaFill', this);
-	        return map;
-	    };
+	function whichPolygon(data) {
+	  var bboxes = [];
 
-	    map.toggleWireframe = function() {
+	  for (var i = 0; i < data.features.length; i++) {
+	    var feature = data.features[i];
+	    var coords = feature.geometry.coordinates;
 
-	        var activeFill = map.activeAreaFill();
+	    if (feature.geometry.type === 'Polygon') {
+	      bboxes.push(treeItem(coords, feature.properties));
+	    } else if (feature.geometry.type === 'MultiPolygon') {
+	      for (var j = 0; j < coords.length; j++) {
+	        bboxes.push(treeItem(coords[j], feature.properties));
+	      }
+	    }
+	  }
 
-	        if (activeFill === 'wireframe') {
-	            activeFill = corePreferences('area-fill-toggle') || 'partial';
-	        } else {
-	            activeFill = 'wireframe';
-	        }
+	  var tree = rbush_1().load(bboxes);
 
-	        map.activeAreaFill(activeFill);
-	    };
+	  function query(p, multi) {
+	    var output = [],
+	        result = tree.search({
+	      minX: p[0],
+	      minY: p[1],
+	      maxX: p[0],
+	      maxY: p[1]
+	    });
 
-	    function updateAreaFill() {
-	        var activeFill = map.activeAreaFill();
-	        map.areaFillOptions.forEach(function(opt) {
-	            surface.classed('fill-' + opt, Boolean(opt === activeFill));
-	        });
+	    for (var i = 0; i < result.length; i++) {
+	      if (insidePolygon(result[i].coords, p)) {
+	        if (multi) output.push(result[i].props);else return result[i].props;
+	      }
 	    }
 
+	    return multi && output.length ? output : null;
+	  }
 
-	    map.layers = function () { return drawLayers; };
+	  query.tree = tree;
 
+	  query.bbox = function queryBBox(bbox) {
+	    var output = [];
+	    var result = tree.search({
+	      minX: bbox[0],
+	      minY: bbox[1],
+	      maxX: bbox[2],
+	      maxY: bbox[3]
+	    });
 
-	    map.doubleUpHandler = function() {
-	        return _doubleUpHandler;
-	    };
+	    for (var i = 0; i < result.length; i++) {
+	      if (polygonIntersectsBBox(result[i].coords, bbox)) {
+	        output.push(result[i].props);
+	      }
+	    }
 
+	    return output;
+	  };
 
-	    return utilRebind(map, dispatch$1, 'on');
+	  return query;
 	}
 
-	function rendererPhotos(context) {
-	    var dispatch$1 = dispatch('change');
-	    var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
-	    var _allPhotoTypes = ['flat', 'panoramic'];
-	    var _shownPhotoTypes = _allPhotoTypes.slice();   // shallow copy
+	function polygonIntersectsBBox(polygon, bbox) {
+	  var bboxCenter = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
+	  if (insidePolygon(polygon, bboxCenter)) return true;
 
-	    function photos() {}
+	  for (var i = 0; i < polygon.length; i++) {
+	    if (lineclip_1$1(polygon[i], bbox).length > 0) return true;
+	  }
 
-	    function updateStorage() {
-	        if (window.mocha) { return; }
+	  return false;
+	} // ray casting algorithm for detecting if point is in polygon
 
-	        var hash = utilStringQs(window.location.hash);
-	        var enabled = context.layers().all().filter(function(d) {
-	            return _layerIDs.indexOf(d.id) !== -1 && d.layer && d.layer.supported() && d.layer.enabled();
-	        }).map(function(d) {
-	            return d.id;
-	        });
-	        if (enabled.length) {
-	            hash.photo_overlay = enabled.join(',');
-	        } else {
-	            delete hash.photo_overlay;
-	        }
-	        window.location.replace('#' + utilQsString(hash, true));
-	    }
 
-	    photos.overlayLayerIDs = function() {
-	        return _layerIDs;
-	    };
+	function insidePolygon(rings, p) {
+	  var inside = false;
 
-	    photos.allPhotoTypes = function() {
-	        return _allPhotoTypes;
-	    };
+	  for (var i = 0, len = rings.length; i < len; i++) {
+	    var ring = rings[i];
 
-	    function showsLayer(id) {
-	        var layer = context.layers().layer(id);
-	        return layer && layer.supported() && layer.enabled();
+	    for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
+	      if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
 	    }
+	  }
 
-	    photos.shouldFilterByPhotoType = function() {
-	        return showsLayer('mapillary') ||
-	            (showsLayer('streetside') && showsLayer('openstreetcam'));
-	    };
+	  return inside;
+	}
 
-	    photos.showsPhotoType = function(val) {
-	        if (!photos.shouldFilterByPhotoType()) { return true; }
+	function rayIntersect(p, p1, p2) {
+	  return p1[1] > p[1] !== p2[1] > p[1] && p[0] < (p2[0] - p1[0]) * (p[1] - p1[1]) / (p2[1] - p1[1]) + p1[0];
+	}
 
-	        return _shownPhotoTypes.indexOf(val) !== -1;
-	    };
+	function treeItem(coords, props) {
+	  var item = {
+	    minX: Infinity,
+	    minY: Infinity,
+	    maxX: -Infinity,
+	    maxY: -Infinity,
+	    coords: coords,
+	    props: props
+	  };
 
-	    photos.showsFlat = function() {
-	        return photos.showsPhotoType('flat');
-	    };
+	  for (var i = 0; i < coords[0].length; i++) {
+	    var p = coords[0][i];
+	    item.minX = Math.min(item.minX, p[0]);
+	    item.minY = Math.min(item.minY, p[1]);
+	    item.maxX = Math.max(item.maxX, p[0]);
+	    item.maxY = Math.max(item.maxY, p[1]);
+	  }
 
-	    photos.showsPanoramic = function() {
-	        return photos.showsPhotoType('panoramic');
-	    };
+	  return item;
+	}
 
-	    photos.togglePhotoType = function(val) {
-	        var index = _shownPhotoTypes.indexOf(val);
-	        if (index !== -1) {
-	            _shownPhotoTypes.splice(index, 1);
-	        } else {
-	            _shownPhotoTypes.push(val);
-	        }
-	        dispatch$1.call('change', this);
-	        return photos;
-	    };
+	var type = "FeatureCollection";
+	var features = [{type:"Feature",properties:{m49:"680",wikidata:"Q3405693",nameEn:"Sark",country:"GB",groups:["GG","830","154","150"],level:"subterritory",driveSide:"left",roadSpeedUnit:"mph",callingCodes:["44 01481"]},geometry:{type:"MultiPolygon",coordinates:[[[[-2.36485,49.48223],[-2.65349,49.15373],[-2.09454,49.46288],[-2.36485,49.48223]]]]}},{type:"Feature",properties:{m49:"001",wikidata:"Q2",nameEn:"World",aliases:["Earth","Planet"],level:"world"},geometry:null},{type:"Feature",properties:{m49:"142",wikidata:"Q48",nameEn:"Asia",level:"region"},geometry:null},{type:"Feature",properties:{m49:"143",wikidata:"Q27275",nameEn:"Central Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"145",wikidata:"Q27293",nameEn:"Western Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"150",wikidata:"Q46",nameEn:"Europe",level:"region"},geometry:null},{type:"Feature",properties:{m49:"151",wikidata:"Q27468",nameEn:"Eastern Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"154",wikidata:"Q27479",nameEn:"Northern Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"155",wikidata:"Q27496",nameEn:"Western Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"202",wikidata:"Q132959",nameEn:"Sub-Saharan Africa",groups:["002"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"419",wikidata:"Q72829598",nameEn:"Latin America and the Caribbean",groups:["019"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"830",wikidata:"Q42314",nameEn:"Channel Islands",groups:["150","154"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"019",wikidata:"Q828",nameEn:"Americas",level:"region"},geometry:null},{type:"Feature",properties:{m49:"029",wikidata:"Q664609",nameEn:"Caribbean",groups:["419","019","003"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"034",wikidata:"Q771405",nameEn:"Southern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"002",wikidata:"Q15",nameEn:"Africa",level:"region"},geometry:null},{type:"Feature",properties:{m49:"003",wikidata:"Q49",nameEn:"North America",groups:["019"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"017",wikidata:"Q27433",nameEn:"Middle Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"039",wikidata:"Q27449",nameEn:"Southern Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"005",wikidata:"Q18",nameEn:"South America",groups:["419","019"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"009",wikidata:"Q538",nameEn:"Oceania",level:"region"},geometry:null},{type:"Feature",properties:{m49:"061",wikidata:"Q35942",nameEn:"Polynesia",groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"014",wikidata:"Q27407",nameEn:"Eastern Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"053",wikidata:"Q45256",nameEn:"Australia and New Zealand",aliases:["Australasia"],groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"011",wikidata:"Q4412",nameEn:"Western Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"013",wikidata:"Q27611",nameEn:"Central America",groups:["419","019","003"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"021",wikidata:"Q2017699",nameEn:"Northern America",groups:["019","003"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"035",wikidata:"Q11708",nameEn:"South-eastern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"018",wikidata:"Q27394",nameEn:"Southern Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"030",wikidata:"Q27231",nameEn:"Eastern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"015",wikidata:"Q27381",nameEn:"Northern Africa",groups:["002"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"054",wikidata:"Q37394",nameEn:"Melanesia",groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"057",wikidata:"Q3359409",nameEn:"Micronesia",groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{iso1A2:"AC",iso1A3:"ASC",wikidata:"Q46197",nameEn:"Ascension 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-	    photos.init = function() {
-	        var hash = utilStringQs(window.location.hash);
-	        if (hash.photo_overlay) {
-	            var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
-	            hashOverlayIDs.forEach(function(id) {
-	                var layer = context.layers().layer(id);
-	                if (layer) { layer.enabled(true); }
-	            });
-	        }
+	var borders = rawBorders;
+	var whichPolygonGetter = {};
+	var featuresByCode = {};
+	var idFilterRegex = /\bThe\b|\bthe\b|\band\b|\bof\b|[-_ .,()&[\]/]/g;
+	var levels = ['subterritory', 'territory', 'country', 'intermediateRegion', 'subregion', 'region', 'union', 'world'];
+	loadDerivedDataAndCaches(borders);
 
-	        context.layers().on('change.rendererPhotos', updateStorage);
-	    };
+	function loadDerivedDataAndCaches(borders) {
+	  var identifierProps = ['iso1A2', 'iso1A3', 'm49', 'wikidata', 'emojiFlag', 'nameEn'];
+	  var geometryFeatures = [];
 
-	    return utilRebind(photos, dispatch$1, 'on');
-	}
+	  for (var i in borders.features) {
+	    var _feature = borders.features[i];
+	    _feature.properties.id = _feature.properties.iso1A2 || _feature.properties.m49;
+	    loadM49(_feature);
+	    loadIsoStatus(_feature);
+	    loadLevel(_feature);
+	    loadGroups(_feature);
+	    loadRoadSpeedUnit(_feature);
+	    loadDriveSide(_feature);
+	    loadFlag(_feature);
+	    cacheFeatureByIDs(_feature);
+	    if (_feature.geometry) geometryFeatures.push(_feature);
+	  }
+
+	  for (var _i in borders.features) {
+	    var _feature2 = borders.features[_i];
+
+	    _feature2.properties.groups.sort(function (groupID1, groupID2) {
+	      return levels.indexOf(featuresByCode[groupID1].properties.level) - levels.indexOf(featuresByCode[groupID2].properties.level);
+	    });
 
-	function uiAccount(context) {
-	    var osm = context.connection();
+	    loadMembersForGroupsOf(_feature2);
+	  }
 
+	  var geometryOnlyCollection = {
+	    type: 'RegionFeatureCollection',
+	    features: geometryFeatures
+	  };
+	  whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
 
-	    function update(selection) {
-	        if (!osm) { return; }
+	  function loadGroups(feature) {
+	    var props = feature.properties;
 
-	        if (!osm.authenticated()) {
-	            selection.selectAll('.userLink, .logoutLink')
-	                .classed('hide', true);
-	            return;
-	        }
+	    if (!props.groups) {
+	      props.groups = [];
+	    }
+
+	    if (props.country) {
+	      props.groups.push(props.country);
+	    }
 
-	        osm.userDetails(function(err, details) {
-	            var userLink = selection.select('.userLink'),
-	                logoutLink = selection.select('.logoutLink');
+	    if (props.m49 !== '001') {
+	      props.groups.push('001');
+	    }
+	  }
 
-	            userLink.html('');
-	            logoutLink.html('');
+	  function loadM49(feature) {
+	    var props = feature.properties;
 
-	            if (err || !details) { return; }
+	    if (!props.m49 && props.iso1N3) {
+	      props.m49 = props.iso1N3;
+	    }
+	  }
 
-	            selection.selectAll('.userLink, .logoutLink')
-	                .classed('hide', false);
+	  function loadIsoStatus(feature) {
+	    var props = feature.properties;
 
-	            // Link
-	            userLink.append('a')
-	                .attr('href', osm.userURL(details.display_name))
-	                .attr('target', '_blank');
+	    if (!props.isoStatus && props.iso1A2) {
+	      props.isoStatus = 'official';
+	    }
+	  }
 
-	            // Add thumbnail or dont
-	            if (details.image_url) {
-	                userLink.append('img')
-	                    .attr('class', 'icon pre-text user-icon')
-	                    .attr('src', details.image_url);
-	            } else {
-	                userLink
-	                    .call(svgIcon('#iD-icon-avatar', 'pre-text light'));
-	            }
+	  function loadLevel(feature) {
+	    var props = feature.properties;
+	    if (props.level) return;
 
-	            // Add user name
-	            userLink.append('span')
-	                .attr('class', 'label')
-	                .text(details.display_name);
-
-	            logoutLink.append('a')
-	                .attr('class', 'logout')
-	                .attr('href', '#')
-	                .text(_t('logout'))
-	                .on('click.logout', function() {
-	                    event.preventDefault();
-	                    osm.logout();
-	                });
-	        });
+	    if (!props.country) {
+	      props.level = 'country';
+	    } else if (props.isoStatus === 'official') {
+	      props.level = 'territory';
+	    } else {
+	      props.level = 'subterritory';
 	    }
+	  }
 
+	  function loadRoadSpeedUnit(feature) {
+	    var props = feature.properties;
 
-	    return function(selection) {
-	        selection.append('li')
-	            .attr('class', 'logoutLink')
-	            .classed('hide', true);
+	    if (props.roadSpeedUnit === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
+	      props.roadSpeedUnit = 'km/h';
+	    }
+	  }
 
-	        selection.append('li')
-	            .attr('class', 'userLink')
-	            .classed('hide', true);
+	  function loadDriveSide(feature) {
+	    var props = feature.properties;
 
-	        if (osm) {
-	            osm.on('change.account', function() { update(selection); });
-	            update(selection);
-	        }
-	    };
-	}
+	    if (props.driveSide === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
+	      props.driveSide = 'right';
+	    }
+	  }
 
-	function uiAttribution(context) {
-	  var _selection = select(null);
+	  function loadFlag(feature) {
+	    if (!feature.properties.iso1A2) return;
+	    var flag = feature.properties.iso1A2.replace(/./g, function (_char) {
+	      return String.fromCodePoint(_char.charCodeAt(0) + 127397);
+	    });
+	    feature.properties.emojiFlag = flag;
+	  }
 
+	  function loadMembersForGroupsOf(feature) {
+	    var featureID = feature.properties.id;
+	    var standardizedGroupIDs = [];
 
-	  function render(selection, data, klass) {
-	    var div = selection.selectAll(("." + klass))
-	      .data([0]);
+	    for (var j in feature.properties.groups) {
+	      var groupID = feature.properties.groups[j];
+	      var groupFeature = featuresByCode[groupID];
+	      standardizedGroupIDs.push(groupFeature.properties.id);
 
-	    div = div.enter()
-	      .append('div')
-	      .attr('class', klass)
-	      .merge(div);
+	      if (groupFeature.properties.members) {
+	        groupFeature.properties.members.push(featureID);
+	      } else {
+	        groupFeature.properties.members = [featureID];
+	      }
+	    }
 
+	    feature.properties.groups = standardizedGroupIDs;
+	  }
 
-	    var attributions = div.selectAll('.attribution')
-	      .data(data, function (d) { return d.id; });
+	  function cacheFeatureByIDs(feature) {
+	    for (var k in identifierProps) {
+	      var prop = identifierProps[k];
+	      var id = prop && feature.properties[prop];
 
-	    attributions.exit()
-	      .remove();
+	      if (id) {
+	        id = id.replace(idFilterRegex, '').toUpperCase();
+	        featuresByCode[id] = feature;
+	      }
+	    }
 
-	    attributions = attributions.enter()
-	      .append('span')
-	      .attr('class', 'attribution')
-	      .each(function (d, i, nodes) {
-	        var attribution = select(nodes[i]);
+	    if (feature.properties.aliases) {
+	      for (var j in feature.properties.aliases) {
+	        var alias = feature.properties.aliases[j].replace(idFilterRegex, '').toUpperCase();
+	        featuresByCode[alias] = feature;
+	      }
+	    }
+	  }
+	}
 
-	        if (d.terms_html) {
-	          attribution.html(d.terms_html);
-	          return;
-	        }
+	function locArray(loc) {
+	  if (Array.isArray(loc)) {
+	    return loc;
+	  } else if (loc.coordinates) {
+	    return loc.coordinates;
+	  }
 
-	        if (d.terms_url) {
-	          attribution = attribution
-	            .append('a')
-	            .attr('href', d.terms_url)
-	            .attr('target', '_blank');
-	        }
+	  return loc.geometry.coordinates;
+	}
 
-	        var sourceID = d.id.replace(/\./g, '<TX_DOT>');
-	        var terms_text = _t(("imagery." + sourceID + ".attribution.text"),
-	          { default: d.terms_text || d.id || d.name() }
-	        );
+	function smallestFeature(loc) {
+	  var query = locArray(loc);
+	  var featureProperties = whichPolygonGetter(query);
+	  if (!featureProperties) return null;
+	  return featuresByCode[featureProperties.id];
+	}
 
-	        if (d.icon && !d.overlay) {
-	          attribution
-	            .append('img')
-	            .attr('class', 'source-image')
-	            .attr('src', d.icon);
-	        }
+	function countryFeature(loc) {
+	  var feature = smallestFeature(loc);
+	  if (!feature) return null;
+	  var countryCode = feature.properties.country || feature.properties.iso1A2;
+	  return featuresByCode[countryCode];
+	}
 
-	        attribution
-	          .append('span')
-	          .attr('class', 'attribution-text')
-	          .text(terms_text);
-	      })
-	      .merge(attributions);
+	function featureForLoc(loc, opts) {
+	  if (opts && opts.level && opts.level !== 'country') {
+	    var features = featuresContaining(loc);
+	    var targetLevel = opts.level;
+	    var targetLevelIndex = levels.indexOf(targetLevel);
+	    if (targetLevelIndex === -1) return null;
 
+	    for (var i in features) {
+	      var _feature3 = features[i];
 
-	    var copyright = attributions.selectAll('.copyright-notice')
-	      .data(function (d) {
-	        var notice = d.copyrightNotices(context.map().zoom(), context.map().extent());
-	        return notice ? [notice] : [];
-	      });
+	      if (_feature3.properties.level === targetLevel || levels.indexOf(_feature3.properties.level) > targetLevelIndex) {
+	        return _feature3;
+	      }
+	    }
+
+	    return null;
+	  }
+
+	  return countryFeature(loc);
+	}
 
-	    copyright.exit()
-	      .remove();
+	function featureForID(id) {
+	  var stringID;
 
-	    copyright = copyright.enter()
-	      .append('span')
-	      .attr('class', 'copyright-notice')
-	      .merge(copyright);
+	  if (typeof id === 'number') {
+	    stringID = id.toString();
 
-	    copyright
-	      .text(String);
+	    if (stringID.length === 1) {
+	      stringID = '00' + stringID;
+	    } else if (stringID.length === 2) {
+	      stringID = '0' + stringID;
+	    }
+	  } else {
+	    stringID = id.replace(idFilterRegex, '').toUpperCase();
 	  }
 
+	  return featuresByCode[stringID] || null;
+	}
 
-	  function update() {
-	    var baselayer = context.background().baseLayerSource();
-	    _selection
-	      .call(render, (baselayer ? [baselayer] : []), 'base-layer-attribution');
+	function smallestOrMatchingFeature(query) {
+	  if (_typeof(query) === 'object') {
+	    return smallestFeature(query);
+	  }
 
-	    var z = context.map().zoom();
-	    var overlays = context.background().overlayLayerSources() || [];
-	    _selection
-	      .call(render, overlays.filter(function (s) { return s.validZoom(z); }), 'overlay-layer-attribution');
+	  return featureForID(query);
+	}
+
+	function feature(query, opts) {
+	  if (_typeof(query) === 'object') {
+	    return featureForLoc(query, opts);
 	  }
 
+	  return featureForID(query);
+	}
+	function iso1A2Code(query, opts) {
+	  var match = feature(query, opts);
+	  if (!match) return null;
+	  return match.properties.iso1A2 || null;
+	}
+	function featuresContaining(query, strict) {
+	  var feature = smallestOrMatchingFeature(query);
+	  if (!feature) return [];
+	  var features = [];
 
-	  return function(selection) {
-	    _selection = selection;
+	  if (!strict || _typeof(query) === 'object') {
+	    features.push(feature);
+	  }
 
-	    context.background()
-	      .on('change.attribution', update);
+	  var properties = feature.properties;
 
-	    context.map()
-	      .on('move.attribution', throttle(update, 400, { leading: false }));
+	  for (var i in properties.groups) {
+	    var groupID = properties.groups[i];
+	    features.push(featuresByCode[groupID]);
+	  }
 
-	    update();
-	  };
+	  return features;
+	}
+	function roadSpeedUnit(query) {
+	  var feature = smallestOrMatchingFeature(query);
+	  return feature && feature.properties.roadSpeedUnit || null;
 	}
 
-	function uiContributors(context) {
-	    var osm = context.connection(),
-	        debouncedUpdate = debounce(function() { update(); }, 1000),
-	        limit = 4,
-	        hidden = false,
-	        wrap = select(null);
+	var _dataDeprecated;
 
+	var _nsi;
 
-	    function update() {
-	        if (!osm) { return; }
+	function validationOutdatedTags() {
+	  var type = 'outdated_tags';
+	  var nsiKeys = ['amenity', 'shop', 'tourism', 'leisure', 'office']; // A concern here in switching to async data means that `_dataDeprecated`
+	  // and `_nsi` will not be available at first, so the data on early tiles
+	  // may not have tags validated fully.
+	  // initialize deprecated tags array
 
-	        var users = {},
-	            entities = context.history().intersects(context.map().extent());
+	  _mainFileFetcher.get('deprecated').then(function (d) {
+	    return _dataDeprecated = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  _mainFileFetcher.get('nsi_brands').then(function (d) {
+	    _nsi = {
+	      brands: d.brands,
+	      matcher: matcher$1(),
+	      wikidata: {},
+	      wikipedia: {}
+	    }; // initialize name-suggestion-index matcher
 
-	        entities.forEach(function(entity) {
-	            if (entity && entity.user) { users[entity.user] = true; }
-	        });
+	    _nsi.matcher.buildMatchIndex(d.brands); // index all known wikipedia and wikidata tags
 
-	        var u = Object.keys(users),
-	            subset = u.slice(0, u.length > limit ? limit - 1 : limit);
 
-	        wrap.html('')
-	            .call(svgIcon('#iD-icon-nearby', 'pre-text light'));
+	    Object.keys(d.brands).forEach(function (kvnd) {
+	      var brand = d.brands[kvnd];
+	      var wd = brand.tags['brand:wikidata'];
+	      var wp = brand.tags['brand:wikipedia'];
 
-	        var userList = select(document.createElement('span'));
+	      if (wd) {
+	        _nsi.wikidata[wd] = kvnd;
+	      }
 
-	        userList.selectAll()
-	            .data(subset)
-	            .enter()
-	            .append('a')
-	            .attr('class', 'user-link')
-	            .attr('href', function(d) { return osm.userURL(d); })
-	            .attr('target', '_blank')
-	            .text(String);
-
-	        if (u.length > limit) {
-	            var count = select(document.createElement('span'));
-
-	            count.append('a')
-	                .attr('target', '_blank')
-	                .attr('href', function() {
-	                    return osm.changesetsURL(context.map().center(), context.map().zoom());
-	                })
-	                .text(u.length - limit + 1);
+	      if (wp) {
+	        _nsi.wikipedia[wp] = kvnd;
+	      }
+	    });
+	    return _nsi;
+	  })["catch"](function () {
+	    /* ignore */
+	  });
 
-	            wrap.append('span')
-	                .html(_t('contributors.truncated_list', { users: userList.html(), count: count.html() }));
+	  function oldTagIssues(entity, graph) {
+	    var oldTags = Object.assign({}, entity.tags); // shallow copy
 
-	        } else {
-	            wrap.append('span')
-	                .html(_t('contributors.list', { users: userList.html() }));
-	        }
+	    var preset = _mainPresetIndex.match(entity, graph);
+	    var subtype = 'deprecated_tags';
+	    if (!preset) return []; // upgrade preset..
 
-	        if (!u.length) {
-	            hidden = true;
-	            wrap
-	                .transition()
-	                .style('opacity', 0);
+	    if (preset.replacement) {
+	      var newPreset = _mainPresetIndex.item(preset.replacement);
+	      graph = actionChangePreset(entity.id, preset, newPreset, true
+	      /* skip field defaults */
+	      )(graph);
+	      entity = graph.entity(entity.id);
+	      preset = newPreset;
+	    } // upgrade tags..
 
-	        } else if (hidden) {
-	            wrap
-	                .transition()
-	                .style('opacity', 1);
-	        }
-	    }
 
+	    if (_dataDeprecated) {
+	      var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
 
-	    return function(selection) {
-	        if (!osm) { return; }
-	        wrap = selection;
-	        update();
+	      if (deprecatedTags.length) {
+	        deprecatedTags.forEach(function (tag) {
+	          graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
+	        });
+	        entity = graph.entity(entity.id);
+	      }
+	    } // add missing addTags..
 
-	        osm.on('loaded.contributors', debouncedUpdate);
-	        context.map().on('move.contributors', debouncedUpdate);
-	    };
-	}
 
-	var _popoverID = 0;
+	    var newTags = Object.assign({}, entity.tags); // shallow copy
 
-	function uiPopover(klass) {
-	    var _id = _popoverID++;
-	    var _anchorSelection = select(null);
-	    var popover = function(selection) {
-	        _anchorSelection = selection;
-	        selection.each(setup);
-	    };
-	    var _animation = utilFunctor(false);
-	    var _placement = utilFunctor('top'); // top, bottom, left, right
-	    var _alignment = utilFunctor('center');  // leading, center, trailing
-	    var _scrollContainer = utilFunctor(select(null));
-	    var _content;
-	    var _displayType = utilFunctor('');
-	    var _hasArrow = utilFunctor(true);
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-	    popover.displayType = function(val) {
-	        if (arguments.length) {
-	            _displayType = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _displayType;
+	    if (preset.tags !== preset.addTags) {
+	      Object.keys(preset.addTags).forEach(function (k) {
+	        if (!newTags[k]) {
+	          if (preset.addTags[k] === '*') {
+	            newTags[k] = 'yes';
+	          } else {
+	            newTags[k] = preset.addTags[k];
+	          }
 	        }
-	    };
+	      });
+	    }
 
-	    popover.hasArrow = function(val) {
-	        if (arguments.length) {
-	            _hasArrow = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _hasArrow;
-	        }
-	    };
+	    if (_nsi) {
+	      // Do `wikidata` or `wikipedia` identify this entity as a brand?  #6416
+	      // If so, these tags can be swapped to `brand:wikidata`/`brand:wikipedia`
+	      var isBrand;
 
-	    popover.placement = function(val) {
-	        if (arguments.length) {
-	            _placement = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _placement;
-	        }
-	    };
+	      if (newTags.wikidata) {
+	        // try matching `wikidata`
+	        isBrand = _nsi.wikidata[newTags.wikidata];
+	      }
 
-	    popover.alignment = function(val) {
-	        if (arguments.length) {
-	            _alignment = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _alignment;
-	        }
-	    };
+	      if (!isBrand && newTags.wikipedia) {
+	        // fallback to `wikipedia`
+	        isBrand = _nsi.wikipedia[newTags.wikipedia];
+	      }
 
-	    popover.scrollContainer = function(val) {
-	        if (arguments.length) {
-	            _scrollContainer = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _scrollContainer;
+	      if (isBrand && !newTags.office) {
+	        // but avoid doing this for corporate offices
+	        if (newTags.wikidata) {
+	          newTags['brand:wikidata'] = newTags.wikidata;
+	          delete newTags.wikidata;
 	        }
-	    };
 
-	    popover.content = function(val) {
-	        if (arguments.length) {
-	            _content = val;
-	            return popover;
-	        } else {
-	            return _content;
-	        }
-	    };
+	        if (newTags.wikipedia) {
+	          newTags['brand:wikipedia'] = newTags.wikipedia;
+	          delete newTags.wikipedia;
+	        } // I considered setting `name` and other tags here, but they aren't unique per wikidata
+	        // (Q2759586 -> in USA "Papa John's", in Russia "Папа Джонс")
+	        // So users will really need to use a preset or assign `name` themselves.
 
-	    popover.isShown = function() {
-	        var popoverSelection = _anchorSelection.select('.popover-' + _id);
-	        return !popoverSelection.empty() && popoverSelection.classed('in');
-	    };
+	      } // try key/value|name match against name-suggestion-index
 
-	    popover.show = function() {
-	        _anchorSelection.each(show);
-	    };
 
-	    popover.updateContent = function() {
-	        _anchorSelection.each(updateContent);
-	    };
+	      if (newTags.name) {
+	        for (var i = 0; i < nsiKeys.length; i++) {
+	          var k = nsiKeys[i];
+	          if (!newTags[k]) continue;
+	          var center = entity.extent(graph).center();
+	          var countryCode = iso1A2Code(center);
 
-	    popover.hide = function() {
-	        _anchorSelection.each(hide);
-	    };
+	          var match = _nsi.matcher.matchKVN(k, newTags[k], newTags.name, countryCode && countryCode.toLowerCase());
 
-	    popover.toggle = function() {
-	        _anchorSelection.each(toggle);
-	    };
+	          if (!match) continue; // for now skip ambiguous matches (like Target~(USA) vs Target~(Australia))
 
-	    popover.destroy = function(selection, selector) {
-	        // by default, just destroy the current popover
-	        selector = selector || '.popover-' + _id;
-
-	        selection
-	            .on(_pointerPrefix + 'enter.popover', null)
-	            .on(_pointerPrefix + 'leave.popover', null)
-	            .on(_pointerPrefix + 'up.popover', null)
-	            .on(_pointerPrefix + 'down.popover', null)
-	            .on('click.popover', null)
-	            .attr('title', function() {
-	                return this.getAttribute('data-original-title') || this.getAttribute('title');
-	            })
-	            .attr('data-original-title', null)
-	            .selectAll(selector)
-	            .remove();
-	    };
+	          if (match.d) continue;
+	          var brand = _nsi.brands[match.kvnd];
 
+	          if (brand && brand.tags['brand:wikidata'] && brand.tags['brand:wikidata'] !== entity.tags['not:brand:wikidata']) {
+	            subtype = 'noncanonical_brand';
+	            var keepTags = ['takeaway'].reduce(function (acc, k) {
+	              if (newTags[k]) {
+	                acc[k] = newTags[k];
+	              }
 
-	    popover.destroyAny = function(selection) {
-	        selection.call(popover.destroy, '.popover');
-	    };
+	              return acc;
+	            }, {});
+	            nsiKeys.forEach(function (k) {
+	              return delete newTags[k];
+	            });
+	            Object.assign(newTags, brand.tags, keepTags);
+	            break;
+	          }
+	        }
+	      }
+	    } // determine diff
 
-	    function setup() {
-	        var anchor = select(this);
-	        var animate = _animation.apply(this, arguments);
-	        var popoverSelection = anchor.selectAll('.popover-' + _id)
-	            .data([0]);
 
+	    var tagDiff = utilTagDiff(oldTags, newTags);
+	    if (!tagDiff.length) return [];
+	    var isOnlyAddingTags = tagDiff.every(function (d) {
+	      return d.type === '+';
+	    });
+	    var prefix = '';
 
-	        var enter = popoverSelection.enter()
-	            .append('div')
-	            .attr('class', 'popover popover-' + _id + ' ' + (klass ? klass : ''))
-	            .classed('arrowed', _hasArrow.apply(this, arguments));
+	    if (subtype === 'noncanonical_brand') {
+	      prefix = 'noncanonical_brand.';
+	    } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
+	      subtype = 'incomplete_tags';
+	      prefix = 'incomplete.';
+	    } // don't allow autofixing brand tags
 
-	        enter
-	            .append('div')
-	            .attr('class', 'popover-arrow');
 
-	        enter
-	            .append('div')
-	            .attr('class', 'popover-inner');
+	    var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;
+	    return [new validationIssue({
+	      type: type,
+	      subtype: subtype,
+	      severity: 'warning',
+	      message: showMessage,
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      hash: JSON.stringify(tagDiff),
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          autoArgs: autoArgs,
+	          title: _t.html('issues.fix.upgrade_tags.title'),
+	          onClick: function onClick(context) {
+	            context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
+	          }
+	        })];
+	      }
+	    })];
 
-	        popoverSelection = enter
-	            .merge(popoverSelection);
+	    function doUpgrade(graph) {
+	      var currEntity = graph.hasEntity(entity.id);
+	      if (!currEntity) return graph;
+	      var newTags = Object.assign({}, currEntity.tags); // shallow copy
 
-	        if (animate) {
-	            popoverSelection.classed('fade', true);
+	      tagDiff.forEach(function (diff) {
+	        if (diff.type === '-') {
+	          delete newTags[diff.key];
+	        } else if (diff.type === '+') {
+	          newTags[diff.key] = diff.newVal;
 	        }
+	      });
+	      return actionChangeTags(currEntity.id, newTags)(graph);
+	    }
 
-	        var display = _displayType.apply(this, arguments);
+	    function showMessage(context) {
+	      var currEntity = context.hasEntity(entity.id);
+	      if (!currEntity) return '';
+	      var messageID = "issues.outdated_tags.".concat(prefix, "message");
 
-	        if (display === 'hover') {
-	            var _lastNonMouseEnterTime;
-	            anchor.on(_pointerPrefix + 'enter.popover', function() {
+	      if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
+	        messageID += '_incomplete';
+	      }
 
-	                if (event.pointerType) {
-	                    if (event.pointerType !== 'mouse') {
-	                        _lastNonMouseEnterTime = event.timeStamp;
-	                        // only allow hover behavior for mouse input
-	                        return;
-	                    } else if (_lastNonMouseEnterTime &&
-	                        event.timeStamp - _lastNonMouseEnterTime < 1500) {
-	                        // HACK: iOS 13.4 sends an erroneous `mouse` type pointerenter
-	                        // event for non-mouse interactions right after sending
-	                        // the correct type pointerenter event. Workaround by discarding
-	                        // any mouse event that occurs immediately after a non-mouse event.
-	                        return;
-	                    }
-	                }
+	      return _t.html(messageID, {
+	        feature: utilDisplayLabel(currEntity, context.graph())
+	      });
+	    }
 
-	                // don't show if buttons are pressed, e.g. during click and drag of map
-	                if (event.buttons !== 0) { return; }
+	    function showReference(selection) {
+	      var enter = selection.selectAll('.issue-reference').data([0]).enter();
+	      enter.append('div').attr('class', 'issue-reference').html(_t.html("issues.outdated_tags.".concat(prefix, "reference")));
+	      enter.append('strong').html(_t.html('issues.suggested'));
+	      enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
+	        var klass = d.type === '+' ? 'add' : 'remove';
+	        return "tagDiff-cell tagDiff-cell-".concat(klass);
+	      }).html(function (d) {
+	        return d.display;
+	      });
+	    }
+	  }
 
-	                show.apply(this, arguments);
-	            });
-	            anchor.on(_pointerPrefix + 'leave.popover', function() {
-	                hide.apply(this, arguments);
-	            });
+	  function oldMultipolygonIssues(entity, graph) {
+	    var multipolygon, outerWay;
 
-	        } else if (display === 'clickFocus') {
-	            anchor
-	                .on(_pointerPrefix + 'down.popover', function() {
-	                    event.preventDefault();
-	                    event.stopPropagation();
-	                })
-	                .on(_pointerPrefix + 'up.popover', function() {
-	                    event.preventDefault();
-	                    event.stopPropagation();
-	                })
-	                .on('click.popover', toggle);
+	    if (entity.type === 'relation') {
+	      outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
+	      multipolygon = entity;
+	    } else if (entity.type === 'way') {
+	      multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
+	      outerWay = entity;
+	    } else {
+	      return [];
+	    }
 
-	            popoverSelection
-	                .attr('tabindex', 0)
-	                .on('blur.popover', function() {
-	                    anchor.each(function() {
-	                        hide.apply(this, arguments);
-	                    });
-	                });
-	        }
+	    if (!multipolygon || !outerWay) return [];
+	    return [new validationIssue({
+	      type: type,
+	      subtype: 'old_multipolygon',
+	      severity: 'warning',
+	      message: showMessage,
+	      reference: showReference,
+	      entityIds: [outerWay.id, multipolygon.id],
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          autoArgs: [doUpgrade, _t('issues.fix.move_tags.annotation')],
+	          title: _t.html('issues.fix.move_tags.title'),
+	          onClick: function onClick(context) {
+	            context.perform(doUpgrade, _t('issues.fix.move_tags.annotation'));
+	          }
+	        })];
+	      }
+	    })];
+
+	    function doUpgrade(graph) {
+	      var currMultipolygon = graph.hasEntity(multipolygon.id);
+	      var currOuterWay = graph.hasEntity(outerWay.id);
+	      if (!currMultipolygon || !currOuterWay) return graph;
+	      currMultipolygon = currMultipolygon.mergeTags(currOuterWay.tags);
+	      graph = graph.replace(currMultipolygon);
+	      return actionChangeTags(currOuterWay.id, {})(graph);
 	    }
 
+	    function showMessage(context) {
+	      var currMultipolygon = context.hasEntity(multipolygon.id);
+	      if (!currMultipolygon) return '';
+	      return _t.html('issues.old_multipolygon.message', {
+	        multipolygon: utilDisplayLabel(currMultipolygon, context.graph())
+	      });
+	    }
 
-	    function show() {
-	        var anchor = select(this);
-	        var popoverSelection = anchor.selectAll('.popover-' + _id);
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.old_multipolygon.reference'));
+	    }
+	  }
 
-	        if (popoverSelection.empty()) {
-	            // popover was removed somehow, put it back
-	            anchor.call(popover.destroy);
-	            anchor.each(setup);
-	            popoverSelection = anchor.selectAll('.popover-' + _id);
-	        }
+	  var validation = function checkOutdatedTags(entity, graph) {
+	    var issues = oldMultipolygonIssues(entity, graph);
+	    if (!issues.length) issues = oldTagIssues(entity, graph);
+	    return issues;
+	  };
+
+	  validation.type = type;
+	  return validation;
+	}
 
-	        popoverSelection.classed('in', true);
+	function validationPrivateData() {
+	  var type = 'private_data'; // assume that some buildings are private
+
+	  var privateBuildingValues = {
+	    detached: true,
+	    farm: true,
+	    house: true,
+	    houseboat: true,
+	    residential: true,
+	    semidetached_house: true,
+	    static_caravan: true
+	  }; // but they might be public if they have one of these other tags
+
+	  var publicKeys = {
+	    amenity: true,
+	    craft: true,
+	    historic: true,
+	    leisure: true,
+	    office: true,
+	    shop: true,
+	    tourism: true
+	  }; // these tags may contain personally identifying info
+
+	  var personalTags = {
+	    'contact:email': true,
+	    'contact:fax': true,
+	    'contact:phone': true,
+	    email: true,
+	    fax: true,
+	    phone: true
+	  };
+
+	  var validation = function checkPrivateData(entity) {
+	    var tags = entity.tags;
+	    if (!tags.building || !privateBuildingValues[tags.building]) return [];
+	    var keepTags = {};
 
-	        var displayType = _displayType.apply(this, arguments);
-	        if (displayType === 'clickFocus') {
-	            anchor.classed('active', true);
-	            popoverSelection.node().focus();
-	        }
+	    for (var k in tags) {
+	      if (publicKeys[k]) return []; // probably a public feature
 
-	        anchor.each(updateContent);
+	      if (!personalTags[k]) {
+	        keepTags[k] = tags[k];
+	      }
 	    }
 
-	    function updateContent() {
-	        var anchor = select(this);
+	    var tagDiff = utilTagDiff(tags, keepTags);
+	    if (!tagDiff.length) return [];
+	    var fixID = tagDiff.length === 1 ? 'remove_tag' : 'remove_tags';
+	    return [new validationIssue({
+	      type: type,
+	      severity: 'warning',
+	      message: showMessage,
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.' + fixID + '.title'),
+	          onClick: function onClick(context) {
+	            context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
+	          }
+	        })];
+	      }
+	    })];
+
+	    function doUpgrade(graph) {
+	      var currEntity = graph.hasEntity(entity.id);
+	      if (!currEntity) return graph;
+	      var newTags = Object.assign({}, currEntity.tags); // shallow copy
 
-	        if (_content) {
-	            anchor.selectAll('.popover-' + _id + ' > .popover-inner')
-	                .call(_content.apply(this, arguments));
+	      tagDiff.forEach(function (diff) {
+	        if (diff.type === '-') {
+	          delete newTags[diff.key];
+	        } else if (diff.type === '+') {
+	          newTags[diff.key] = diff.newVal;
 	        }
+	      });
+	      return actionChangeTags(currEntity.id, newTags)(graph);
+	    }
 
-	        updatePosition.apply(this, arguments);
-	        // hack: update multiple times to fix instances where the absolute offset is
-	        // set before the dynamic popover size is calculated by the browser
-	        updatePosition.apply(this, arguments);
-	        updatePosition.apply(this, arguments);
+	    function showMessage(context) {
+	      var currEntity = context.hasEntity(this.entityIds[0]);
+	      if (!currEntity) return '';
+	      return _t.html('issues.private_data.contact.message', {
+	        feature: utilDisplayLabel(currEntity, context.graph())
+	      });
 	    }
 
+	    function showReference(selection) {
+	      var enter = selection.selectAll('.issue-reference').data([0]).enter();
+	      enter.append('div').attr('class', 'issue-reference').html(_t.html('issues.private_data.reference'));
+	      enter.append('strong').html(_t.html('issues.suggested'));
+	      enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
+	        var klass = d.type === '+' ? 'add' : 'remove';
+	        return 'tagDiff-cell tagDiff-cell-' + klass;
+	      }).html(function (d) {
+	        return d.display;
+	      });
+	    }
+	  };
 
-	    function updatePosition() {
+	  validation.type = type;
+	  return validation;
+	}
 
-	        var anchor = select(this);
-	        var popoverSelection = anchor.selectAll('.popover-' + _id);
+	var _discardNameRegexes = [];
+	function validationSuspiciousName() {
+	  var type = 'suspicious_name';
+	  var keysToTestForGenericValues = ['aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway', 'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway']; // A concern here in switching to async data means that `_nsiFilters` will not
+	  // be available at first, so the data on early tiles may not have tags validated fully.
 
-	        var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
-	        var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
-	        var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
-	        var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
+	  _mainFileFetcher.get('nsi_filters').then(function (filters) {
+	    // known list of generic names (e.g. "bar")
+	    _discardNameRegexes = filters.discardNames.map(function (discardName) {
+	      return new RegExp(discardName, 'i');
+	    });
+	  })["catch"](function () {
+	    /* ignore */
+	  });
 
-	        var placement = _placement.apply(this, arguments);
-	        popoverSelection
-	            .classed('left', false)
-	            .classed('right', false)
-	            .classed('top', false)
-	            .classed('bottom', false)
-	            .classed(placement, true);
+	  function isDiscardedSuggestionName(lowercaseName) {
+	    return _discardNameRegexes.some(function (regex) {
+	      return regex.test(lowercaseName);
+	    });
+	  } // test if the name is just the key or tag value (e.g. "park")
 
-	        var alignment = _alignment.apply(this, arguments);
-	        var alignFactor = 0.5;
-	        if (alignment === 'leading') {
-	            alignFactor = 0;
-	        } else if (alignment === 'trailing') {
-	            alignFactor = 1;
-	        }
-	        var anchorFrame = getFrame(anchor.node());
-	        var popoverFrame = getFrame(popoverSelection.node());
-	        var position;
 
-	        switch (placement) {
-	            case 'top':
-	            position = {
-	                x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-	                y: anchorFrame.y - popoverFrame.h
-	            };
-	            break;
-	            case 'bottom':
-	            position = {
-	                x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-	                y: anchorFrame.y + anchorFrame.h
-	            };
-	            break;
-	            case 'left':
-	            position = {
-	                x: anchorFrame.x - popoverFrame.w,
-	                y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-	            };
-	            break;
-	            case 'right':
-	            position = {
-	                x: anchorFrame.x + anchorFrame.w,
-	                y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-	            };
-	            break;
-	        }
+	  function nameMatchesRawTag(lowercaseName, tags) {
+	    for (var i = 0; i < keysToTestForGenericValues.length; i++) {
+	      var key = keysToTestForGenericValues[i];
+	      var val = tags[key];
 
-	        if (position) {
+	      if (val) {
+	        val = val.toLowerCase();
 
-	            if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+	        if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
+	          return true;
+	        }
+	      }
+	    }
 
-	                var initialPosX = position.x;
+	    return false;
+	  }
 
-	                if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
-	                    position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
-	                } else if (position.x < 10) {
-	                    position.x = 10;
-	                }
+	  function isGenericName(name, tags) {
+	    name = name.toLowerCase();
+	    return nameMatchesRawTag(name, tags) || isDiscardedSuggestionName(name);
+	  }
 
-	                var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow');
-	                // keep the arrow centered on the button, or as close as possible
-	                var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
-	                arrow.style('left', ~~arrowPosX + 'px');
-	            }
+	  function makeGenericNameIssue(entityId, nameKey, genericName, langCode) {
+	    return new validationIssue({
+	      type: type,
+	      subtype: 'generic_name',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        if (!entity) return '';
+	        var preset = _mainPresetIndex.match(entity, context.graph());
+	        var langName = langCode && _mainLocalizer.languageName(langCode);
+	        return _t.html('issues.generic_name.message' + (langName ? '_language' : ''), {
+	          feature: preset.name(),
+	          name: genericName,
+	          language: langName
+	        });
+	      },
+	      reference: showReference,
+	      entityIds: [entityId],
+	      hash: nameKey + '=' + genericName,
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.remove_the_name.title'),
+	          onClick: function onClick(context) {
+	            var entityId = this.issue.entityIds[0];
+	            var entity = context.entity(entityId);
+	            var tags = Object.assign({}, entity.tags); // shallow copy
 
-	            popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
-	        } else {
-	            popoverSelection.style('left', null).style('top', null);
-	        }
+	            delete tags[nameKey];
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation'));
+	          }
+	        })];
+	      }
+	    });
 
-	        function getFrame(node) {
-	            var positionStyle = select(node).style('position');
-	            if (positionStyle === 'absolute' || positionStyle === 'static') {
-	                return {
-	                    x: node.offsetLeft - scrollLeft,
-	                    y: node.offsetTop - scrollTop,
-	                    w: node.offsetWidth,
-	                    h: node.offsetHeight
-	                };
-	            } else {
-	                return {
-	                    x: 0,
-	                    y: 0,
-	                    w: node.offsetWidth,
-	                    h: node.offsetHeight
-	                };
-	            }
-	        }
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
 	    }
+	  }
 
+	  function makeIncorrectNameIssue(entityId, nameKey, incorrectName, langCode) {
+	    return new validationIssue({
+	      type: type,
+	      subtype: 'not_name',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        if (!entity) return '';
+	        var preset = _mainPresetIndex.match(entity, context.graph());
+	        var langName = langCode && _mainLocalizer.languageName(langCode);
+	        return _t.html('issues.incorrect_name.message' + (langName ? '_language' : ''), {
+	          feature: preset.name(),
+	          name: incorrectName,
+	          language: langName
+	        });
+	      },
+	      reference: showReference,
+	      entityIds: [entityId],
+	      hash: nameKey + '=' + incorrectName,
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          icon: 'iD-operation-delete',
+	          title: _t.html('issues.fix.remove_the_name.title'),
+	          onClick: function onClick(context) {
+	            var entityId = this.issue.entityIds[0];
+	            var entity = context.entity(entityId);
+	            var tags = Object.assign({}, entity.tags); // shallow copy
 
-	    function hide() {
-	        var anchor = select(this);
-	        if (_displayType.apply(this, arguments) === 'clickFocus') {
-	            anchor.classed('active', false);
-	        }
-	        anchor.selectAll('.popover-' + _id).classed('in', false);
-	    }
-
+	            delete tags[nameKey];
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
+	          }
+	        })];
+	      }
+	    });
 
-	    function toggle() {
-	        if (select(this).select('.popover-' + _id).classed('in')) {
-	            hide.apply(this, arguments);
-	        } else {
-	            show.apply(this, arguments);
-	        }
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
 	    }
+	  }
 
+	  var validation = function checkGenericName(entity) {
+	    // a generic name is okay if it's a known brand or entity
+	    if (entity.hasWikidata()) return [];
+	    var issues = [];
+	    var notNames = (entity.tags['not:name'] || '').split(';');
 
-	    return popover;
-	}
-
-	function uiTooltip(klass) {
+	    for (var key in entity.tags) {
+	      var m = key.match(/^name(?:(?::)([a-zA-Z_-]+))?$/);
+	      if (!m) continue;
+	      var langCode = m.length >= 2 ? m[1] : null;
+	      var value = entity.tags[key];
 
-	    var tooltip = uiPopover((klass || '') + ' tooltip')
-	        .displayType('hover');
+	      if (notNames.length) {
+	        for (var i in notNames) {
+	          var notName = notNames[i];
 
-	    var _title = function() {
-	        var title = this.getAttribute('data-original-title');
-	        if (title) {
-	            return title;
-	        } else {
-	            title = this.getAttribute('title');
-	            this.removeAttribute('title');
-	            this.setAttribute('data-original-title', title);
+	          if (notName && value === notName) {
+	            issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
+	            continue;
+	          }
 	        }
-	        return title;
-	    };
-
-	    var _heading = utilFunctor(null);
-	    var _keys = utilFunctor(null);
+	      }
 
-	    tooltip.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = utilFunctor(val);
-	        return tooltip;
-	    };
+	      if (isGenericName(value, entity.tags)) {
+	        issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
+	      }
+	    }
 
-	    tooltip.heading = function(val) {
-	        if (!arguments.length) { return _heading; }
-	        _heading = utilFunctor(val);
-	        return tooltip;
-	    };
+	    return issues;
+	  };
 
-	    tooltip.keys = function(val) {
-	        if (!arguments.length) { return _keys; }
-	        _keys = utilFunctor(val);
-	        return tooltip;
-	    };
+	  validation.type = type;
+	  return validation;
+	}
 
-	    tooltip.content(function() {
-	        var heading = _heading.apply(this, arguments);
-	        var text = _title.apply(this, arguments);
-	        var keys = _keys.apply(this, arguments);
+	function validationUnsquareWay(context) {
+	  var type = 'unsquare_way';
+	  var DEFAULT_DEG_THRESHOLD = 5; // see also issues.js
+	  // use looser epsilon for detection to reduce warnings of buildings that are essentially square already
 
-	        return function(selection) {
+	  var epsilon = 0.05;
+	  var nodeThreshold = 10;
 
-	            var headingSelect = selection
-	                .selectAll('.tooltip-heading')
-	                .data(heading ? [heading] :[]);
+	  function isBuilding(entity, graph) {
+	    if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
+	    return entity.tags.building && entity.tags.building !== 'no';
+	  }
 
-	            headingSelect.exit()
-	                .remove();
+	  var validation = function checkUnsquareWay(entity, graph) {
+	    if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare
 
-	            headingSelect.enter()
-	                .append('div')
-	                .attr('class', 'tooltip-heading')
-	                .merge(headingSelect)
-	                .html(heading);
+	    if (entity.tags.nonsquare === 'yes') return [];
+	    var isClosed = entity.isClosed();
+	    if (!isClosed) return []; // this building has bigger problems
+	    // don't flag ways with lots of nodes since they are likely detail-mapped
 
-	            var textSelect = selection
-	                .selectAll('.tooltip-text')
-	                .data(text ? [text] :[]);
+	    var nodes = graph.childNodes(entity).slice(); // shallow copy
 
-	            textSelect.exit()
-	                .remove();
+	    if (nodes.length > nodeThreshold + 1) return []; // +1 because closing node appears twice
+	    // ignore if not all nodes are fully downloaded
 
-	            textSelect.enter()
-	                .append('div')
-	                .attr('class', 'tooltip-text')
-	                .merge(textSelect)
-	                .html(text);
+	    var osm = services.osm;
+	    if (!osm || nodes.some(function (node) {
+	      return !osm.isDataLoaded(node.loc);
+	    })) return []; // don't flag connected ways to avoid unresolvable unsquare loops
 
-	            var keyhintWrap = selection
-	                .selectAll('.keyhint-wrap')
-	                .data(keys && keys.length ? [0] : []);
+	    var hasConnectedSquarableWays = nodes.some(function (node) {
+	      return graph.parentWays(node).some(function (way) {
+	        if (way.id === entity.id) return false;
+	        if (isBuilding(way, graph)) return true;
+	        return graph.parentRelations(way).some(function (parentRelation) {
+	          return parentRelation.isMultipolygon() && parentRelation.tags.building && parentRelation.tags.building !== 'no';
+	        });
+	      });
+	    });
+	    if (hasConnectedSquarableWays) return []; // user-configurable square threshold
 
-	            keyhintWrap.exit()
-	                .remove();
+	    var storedDegreeThreshold = corePreferences('validate-square-degrees');
+	    var degreeThreshold = isNaN(storedDegreeThreshold) ? DEFAULT_DEG_THRESHOLD : parseFloat(storedDegreeThreshold);
+	    var points = nodes.map(function (node) {
+	      return context.projection(node.loc);
+	    });
+	    if (!geoOrthoCanOrthogonalize(points, isClosed, epsilon, degreeThreshold, true)) return [];
+	    var autoArgs; // don't allow autosquaring features linked to wikidata
 
-	            var keyhintWrapEnter = keyhintWrap.enter()
-	                .append('div')
-	                .attr('class', 'keyhint-wrap');
+	    if (!entity.tags.wikidata) {
+	      // use same degree threshold as for detection
+	      var autoAction = actionOrthogonalize(entity.id, context.projection, undefined, degreeThreshold);
+	      autoAction.transitionable = false; // when autofixing, do it instantly
 
-	            keyhintWrapEnter
-	                .append('span')
-	                .html(_t('tooltip_keyhint'));
+	      autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature', {
+	        n: 1
+	      })];
+	    }
 
-	            keyhintWrap = keyhintWrapEnter.merge(keyhintWrap);
+	    return [new validationIssue({
+	      type: type,
+	      subtype: 'building',
+	      severity: 'warning',
+	      message: function message(context) {
+	        var entity = context.hasEntity(this.entityIds[0]);
+	        return entity ? _t.html('issues.unsquare_way.message', {
+	          feature: utilDisplayLabel(entity, context.graph())
+	        }) : '';
+	      },
+	      reference: showReference,
+	      entityIds: [entity.id],
+	      hash: JSON.stringify(autoArgs !== undefined) + degreeThreshold,
+	      dynamicFixes: function dynamicFixes() {
+	        return [new validationIssueFix({
+	          icon: 'iD-operation-orthogonalize',
+	          title: _t.html('issues.fix.square_feature.title'),
+	          autoArgs: autoArgs,
+	          onClick: function onClick(context, completionHandler) {
+	            var entityId = this.issue.entityIds[0]; // use same degree threshold as for detection
+
+	            context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
+	              n: 1
+	            })); // run after the squaring transition (currently 150ms)
+
+	            window.setTimeout(function () {
+	              completionHandler();
+	            }, 175);
+	          }
+	        })
+	        /*
+	        new validationIssueFix({
+	            title: t.html('issues.fix.tag_as_unsquare.title'),
+	            onClick: function(context) {
+	                var entityId = this.issue.entityIds[0];
+	                var entity = context.entity(entityId);
+	                var tags = Object.assign({}, entity.tags);  // shallow copy
+	                tags.nonsquare = 'yes';
+	                context.perform(
+	                    actionChangeTags(entityId, tags),
+	                    t('issues.fix.tag_as_unsquare.annotation')
+	                );
+	            }
+	        })
+	        */
+	        ];
+	      }
+	    })];
 
-	            keyhintWrap.selectAll('kbd.shortcut')
-	                .data(keys && keys.length ? keys : [])
-	                .enter()
-	                .append('kbd')
-	                .attr('class', 'shortcut')
-	                .html(function(d) {
-	                    return d;
-	                });
-	        };
-	    });
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unsquare_way.buildings.reference'));
+	    }
+	  };
 
-	    return tooltip;
+	  validation.type = type;
+	  return validation;
 	}
 
-	function uiEditMenu(context) {
-	    var dispatch$1 = dispatch('toggled');
+	var Validations = /*#__PURE__*/Object.freeze({
+		__proto__: null,
+		validationAlmostJunction: validationAlmostJunction,
+		validationCloseNodes: validationCloseNodes,
+		validationCrossingWays: validationCrossingWays,
+		validationDisconnectedWay: validationDisconnectedWay,
+		validationFormatting: validationFormatting,
+		validationHelpRequest: validationHelpRequest,
+		validationImpossibleOneway: validationImpossibleOneway,
+		validationIncompatibleSource: validationIncompatibleSource,
+		validationMaprules: validationMaprules,
+		validationMismatchedGeometry: validationMismatchedGeometry,
+		validationMissingRole: validationMissingRole,
+		validationMissingTag: validationMissingTag,
+		validationOutdatedTags: validationOutdatedTags,
+		validationPrivateData: validationPrivateData,
+		validationSuspiciousName: validationSuspiciousName,
+		validationUnsquareWay: validationUnsquareWay
+	});
 
-	    var _menu = select(null);
-	    var _operations = [];
-	    // the position the menu should be displayed relative to
-	    var _anchorLoc = [0, 0];
-	    var _anchorLocLonLat = [0, 0];
-	    // a string indicating how the menu was opened
-	    var _triggerType = '';
+	function coreValidator(context) {
+	  var dispatch$1 = dispatch('validated', 'focusedIssue');
+	  var validator = utilRebind({}, dispatch$1, 'on');
+	  var _rules = {};
+	  var _disabledRules = {};
+	  var _ignoredIssueIDs = {}; // issue.id -> true
 
-	    var _vpTopMargin = 85; // viewport top margin
-	    var _vpBottomMargin = 45; // viewport bottom margin
-	    var _vpSideMargin = 35;   // viewport side margin
+	  var _baseCache = validationCache(); // issues before any user edits
 
-	    var _menuTop = false;
-	    var _menuHeight;
-	    var _menuWidth;
 
-	    // hardcode these values to make menu positioning easier
-	    var _verticalPadding = 4;
+	  var _headCache = validationCache(); // issues after all user edits
 
-	    // see also `.edit-menu .tooltip` CSS; include margin
-	    var _tooltipWidth = 210;
 
-	    // offset the menu slightly from the target location
-	    var _menuSideMargin = 10;
+	  var _validatedGraph = null;
 
-	    var _tooltips = [];
+	  var _deferred = new Set(); //
+	  // initialize the validator rulesets
+	  //
 
-	    var editMenu = function(selection) {
 
-	        var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
+	  validator.init = function () {
+	    Object.values(Validations).forEach(function (validation) {
+	      if (typeof validation !== 'function') return;
+	      var fn = validation(context);
+	      var key = fn.type;
+	      _rules[key] = fn;
+	    });
+	    var disabledRules = corePreferences('validate-disabledRules');
 
-	        var ops = _operations.filter(function(op) {
-	            return !isTouchMenu || !op.mouseOnly;
-	        });
+	    if (disabledRules) {
+	      disabledRules.split(',').forEach(function (key) {
+	        _disabledRules[key] = true;
+	      });
+	    }
+	  };
 
-	        if (!ops.length) { return; }
+	  function reset(resetIgnored) {
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	        _tooltips = [];
+	      _deferred["delete"](handle);
+	    }); // clear caches
 
-	        // Position the menu above the anchor for stylus and finger input
-	        // since the mapper's hand likely obscures the screen below the anchor
-	        _menuTop = isTouchMenu;
+	    if (resetIgnored) _ignoredIssueIDs = {};
+	    _baseCache = validationCache();
+	    _headCache = validationCache();
+	    _validatedGraph = null;
+	  } //
+	  // clear caches, called whenever iD resets after a save
+	  //
 
-	        // Show labels for touch input since there aren't hover tooltips
-	        var showLabels = isTouchMenu;
 
-	        var buttonHeight = showLabels ? 32 : 34;
-	        if (showLabels) {
-	            // Get a general idea of the width based on the length of the label
-	            _menuWidth = 52 + Math.min(120, 6 * Math.max.apply(Math, ops.map(function(op) {
-	                return op.title.length;
-	            })));
-	        } else {
-	            _menuWidth = 44;
-	        }
+	  validator.reset = function () {
+	    reset(true);
+	  };
 
-	        _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+	  validator.resetIgnoredIssues = function () {
+	    _ignoredIssueIDs = {}; // reload UI
 
-	        _menu = selection
-	            .append('div')
-	            .attr('class', 'edit-menu')
-	            .classed('touch-menu', isTouchMenu)
-	            .style('padding', _verticalPadding + 'px 0');
-
-	        var buttons = _menu.selectAll('.edit-menu-item')
-	            .data(ops);
-
-	        // enter
-	        var buttonsEnter = buttons.enter()
-	            .append('button')
-	            .attr('class', function (d) { return 'edit-menu-item edit-menu-item-' + d.id; })
-	            .style('height', buttonHeight + 'px')
-	            .on('click', click)
-	            // don't listen for `mouseup` because we only care about non-mouse pointer types
-	            .on('pointerup', pointerup)
-	            .on('pointerdown mousedown', function pointerdown() {
-	                // don't let button presses also act as map input - #1869
-	                event.stopPropagation();
-	            });
+	    dispatch$1.call('validated');
+	  }; // must update issues when the user changes the unsquare thereshold
 
-	        buttonsEnter.each(function(d) {
-	            var tooltip = uiTooltip()
-	                .heading(d.title)
-	                .title(d.tooltip())
-	                .keys([d.keys[0]]);
 
-	            _tooltips.push(tooltip);
+	  validator.reloadUnsquareIssues = function () {
+	    reloadUnsquareIssues(_headCache, context.graph());
+	    reloadUnsquareIssues(_baseCache, context.history().base());
+	    dispatch$1.call('validated');
+	  };
 
-	            select(this)
-	                .call(tooltip)
-	                .append('div')
-	                .attr('class', 'icon-wrap')
-	                .call(svgIcon('#iD-operation-' + d.id, 'operation'));
-	        });
+	  function reloadUnsquareIssues(cache, graph) {
+	    var checkUnsquareWay = _rules.unsquare_way;
+	    if (typeof checkUnsquareWay !== 'function') return; // uncache existing
 
-	        if (showLabels) {
-	            buttonsEnter.append('span')
-	                .attr('class', 'label')
-	                .text(function(d) {
-	                    return d.title;
-	                });
-	        }
+	    cache.uncacheIssuesOfType('unsquare_way');
+	    var buildings = context.history().tree().intersects(geoExtent([-180, -90], [180, 90]), graph) // everywhere
+	    .filter(function (entity) {
+	      return entity.type === 'way' && entity.tags.building && entity.tags.building !== 'no';
+	    }); // rerun for all buildings
 
-	        // update
-	        buttons = buttonsEnter
-	            .merge(buttons)
-	            .classed('disabled', function(d) { return d.disabled(); });
+	    buildings.forEach(function (entity) {
+	      var detected = checkUnsquareWay(entity, graph);
+	      if (detected.length !== 1) return;
+	      var issue = detected[0];
 
-	        updatePosition();
+	      if (!cache.issuesByEntityID[entity.id]) {
+	        cache.issuesByEntityID[entity.id] = new Set();
+	      }
 
-	        var initialScale = context.projection.scale();
-	        context.map()
-	            .on('move.edit-menu', function() {
-	                if (initialScale !== context.projection.scale()) {
-	                    editMenu.close();
-	                }
-	            })
-	            .on('drawn.edit-menu', function(info) {
-	                if (info.full) { updatePosition(); }
-	            });
+	      cache.issuesByEntityID[entity.id].add(issue.id);
+	      cache.issuesByIssueID[issue.id] = issue;
+	    });
+	  } // options = {
+	  //     what: 'all',     // 'all' or 'edited'
+	  //     where: 'all',   // 'all' or 'visible'
+	  //     includeIgnored: false   // true, false, or 'only'
+	  //     includeDisabledRules: false   // true, false, or 'only'
+	  // };
+
+
+	  validator.getIssues = function (options) {
+	    var opts = Object.assign({
+	      what: 'all',
+	      where: 'all',
+	      includeIgnored: false,
+	      includeDisabledRules: false
+	    }, options);
+	    var issues = Object.values(_headCache.issuesByIssueID);
+	    var view = context.map().extent();
+	    return issues.filter(function (issue) {
+	      if (!issue) return false;
+	      if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) return false;
+	      if (!opts.includeDisabledRules && _disabledRules[issue.type]) return false;
+	      if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) return false;
+	      if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) return false; // Sanity check:  This issue may be for an entity that not longer exists.
+	      // If we detect this, uncache and return false so it is not included..
+
+	      var entityIds = issue.entityIds || [];
+
+	      for (var i = 0; i < entityIds.length; i++) {
+	        var entityId = entityIds[i];
+
+	        if (!context.hasEntity(entityId)) {
+	          delete _headCache.issuesByEntityID[entityId];
+	          delete _headCache.issuesByIssueID[issue.id];
+	          return false;
+	        }
+	      }
 
-	        var lastPointerUpType;
-	        // `pointerup` is always called before `click`
-	        function pointerup() {
-	            lastPointerUpType = event.pointerType;
-	        }
-
-	        function click(operation) {
-	            event.stopPropagation();
-	            if (operation.disabled()) {
-	                if (lastPointerUpType === 'touch' ||
-	                    lastPointerUpType === 'pen') {
-	                    // there are no tooltips for touch interactions so flash feedback instead
-	                    context.ui().flash
-	                        .duration(4000)
-	                        .iconName('#iD-operation-' + operation.id)
-	                        .iconClass('operation disabled')
-	                        .text(operation.tooltip)();
-	                }
-	            } else {
-	                if (lastPointerUpType === 'touch' ||
-	                    lastPointerUpType === 'pen') {
-	                    context.ui().flash
-	                        .duration(2000)
-	                        .iconName('#iD-operation-' + operation.id)
-	                        .iconClass('operation')
-	                        .text(operation.annotation() || operation.title)();
-	                }
+	      if (opts.what === 'edited' && _baseCache.issuesByIssueID[issue.id]) return false;
 
-	                operation();
-	                editMenu.close();
-	            }
-	            lastPointerUpType = null;
-	        }
+	      if (opts.where === 'visible') {
+	        var extent = issue.extent(context.graph());
+	        if (!view.intersects(extent)) return false;
+	      }
 
-	        dispatch$1.call('toggled', this, true);
-	    };
+	      return true;
+	    });
+	  };
 
-	    function updatePosition() {
+	  validator.getResolvedIssues = function () {
+	    var baseIssues = Object.values(_baseCache.issuesByIssueID);
+	    return baseIssues.filter(function (issue) {
+	      return !_headCache.issuesByIssueID[issue.id];
+	    });
+	  };
 
-	        if (!_menu || _menu.empty()) { return; }
+	  validator.focusIssue = function (issue) {
+	    var extent = issue.extent(context.graph());
 
-	        var anchorLoc = context.projection(_anchorLocLonLat);
+	    if (extent) {
+	      var setZoom = Math.max(context.map().zoom(), 19);
+	      context.map().unobscuredCenterZoomEase(extent.center(), setZoom); // select the first entity
 
-	        var viewport = context.surfaceRect();
+	      if (issue.entityIds && issue.entityIds.length) {
+	        window.setTimeout(function () {
+	          var ids = issue.entityIds;
+	          context.enter(modeSelect(context, [ids[0]]));
+	          dispatch$1.call('focusedIssue', this, issue);
+	        }, 250); // after ease
+	      }
+	    }
+	  };
 
-	        if (anchorLoc[0] < 0 ||
-	            anchorLoc[0] > viewport.width ||
-	            anchorLoc[1] < 0 ||
-	            anchorLoc[1] > viewport.height) {
-	            // close the menu if it's gone offscreen
+	  validator.getIssuesBySeverity = function (options) {
+	    var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
+	    groups.error = groups.error || [];
+	    groups.warning = groups.warning || [];
+	    return groups;
+	  }; // show some issue types in a particular order
 
-	            editMenu.close();
-	            return;
-	        }
 
-	        var menuLeft = displayOnLeft(viewport);
+	  var orderedIssueTypes = [// flag missing data first
+	  'missing_tag', 'missing_role', // then flag identity issues
+	  'outdated_tags', 'mismatched_geometry', // flag geometry issues where fixing them might solve connectivity issues
+	  'crossing_ways', 'almost_junction', // then flag connectivity issues
+	  'disconnected_way', 'impossible_oneway']; // returns the issues that the given entity IDs have in common, matching the given options
 
-	        var offset = [0, 0];
+	  validator.getSharedEntityIssues = function (entityIDs, options) {
+	    var cache = _headCache; // gather the issues that are common to all the entities
 
-	        offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
+	    var issueIDs = entityIDs.reduce(function (acc, entityID) {
+	      var entityIssueIDs = cache.issuesByEntityID[entityID] || new Set();
 
-	        if (_menuTop) {
-	            if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
-	                // menu is near top viewport edge, shift downward
-	                offset[1] = -anchorLoc[1] + _vpTopMargin;
-	            } else {
-	                offset[1] = -_menuHeight;
-	            }
-	        } else {
-	            if (anchorLoc[1] + _menuHeight > (viewport.height - _vpBottomMargin)) {
-	                // menu is near bottom viewport edge, shift upwards
-	                offset[1] = -anchorLoc[1] - _menuHeight + viewport.height - _vpBottomMargin;
-	            } else {
-	                offset[1] = 0;
-	            }
-	        }
+	      if (!acc) {
+	        return new Set(entityIssueIDs);
+	      }
 
-	        var origin = geoVecAdd(anchorLoc, offset);
+	      return new Set(_toConsumableArray(acc).filter(function (elem) {
+	        return entityIssueIDs.has(elem);
+	      }));
+	    }, null) || [];
+	    var opts = options || {};
+	    return Array.from(issueIDs).map(function (id) {
+	      return cache.issuesByIssueID[id];
+	    }).filter(function (issue) {
+	      if (!issue) return false;
+	      if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) return false;
+	      if (!opts.includeDisabledRules && _disabledRules[issue.type]) return false;
+	      if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) return false;
+	      if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) return false;
+	      return true;
+	    }).sort(function (issue1, issue2) {
+	      if (issue1.type === issue2.type) {
+	        // issues of the same type, sort deterministically
+	        return issue1.id < issue2.id ? -1 : 1;
+	      }
 
-	        _menu
-	            .style('left', origin[0] + 'px')
-	            .style('top', origin[1] + 'px');
+	      var index1 = orderedIssueTypes.indexOf(issue1.type);
+	      var index2 = orderedIssueTypes.indexOf(issue2.type);
 
-	        var tooltipSide = tooltipPosition(viewport, menuLeft);
-	        _tooltips.forEach(function(tooltip) {
-	            tooltip.placement(tooltipSide);
-	        });
+	      if (index1 !== -1 && index2 !== -1) {
+	        // both issue types have explicit sort orders
+	        return index1 - index2;
+	      } else if (index1 === -1 && index2 === -1) {
+	        // neither issue type has an explicit sort order, sort by type
+	        return issue1.type < issue2.type ? -1 : 1;
+	      } else {
+	        // order explicit types before everything else
+	        return index1 !== -1 ? -1 : 1;
+	      }
+	    });
+	  };
 
-	        function displayOnLeft(viewport) {
-	            if (_mainLocalizer.textDirection() === 'ltr') {
-	                if ((anchorLoc[0] + _menuSideMargin + _menuWidth) > (viewport.width - _vpSideMargin)) {
-	                    // right menu would be too close to the right viewport edge, go left
-	                    return true;
-	                }
-	                // prefer right menu
-	                return false;
+	  validator.getEntityIssues = function (entityID, options) {
+	    return validator.getSharedEntityIssues([entityID], options);
+	  };
 
-	            } else { // rtl
-	                if ((anchorLoc[0] - _menuSideMargin - _menuWidth) < _vpSideMargin) {
-	                    // left menu would be too close to the left viewport edge, go right
-	                    return false;
-	                }
-	                // prefer left menu
-	                return true;
-	            }
-	        }
+	  validator.getRuleKeys = function () {
+	    return Object.keys(_rules);
+	  };
 
-	        function tooltipPosition(viewport, menuLeft) {
-	            if (_mainLocalizer.textDirection() === 'ltr') {
-	                if (menuLeft) {
-	                    // if there's not room for a right-side menu then there definitely
-	                    // isn't room for right-side tooltips
-	                    return 'left';
-	                }
-	                if ((anchorLoc[0] + _menuSideMargin + _menuWidth + _tooltipWidth) > (viewport.width - _vpSideMargin)) {
-	                    // right tooltips would be too close to the right viewport edge, go left
-	                    return 'left';
-	                }
-	                // prefer right tooltips
-	                return 'right';
+	  validator.isRuleEnabled = function (key) {
+	    return !_disabledRules[key];
+	  };
 
-	            } else { // rtl
-	                if (!menuLeft) {
-	                    return 'right';
-	                }
-	                if ((anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth) < _vpSideMargin) {
-	                    // left tooltips would be too close to the left viewport edge, go right
-	                    return 'right';
-	                }
-	                // prefer left tooltips
-	                return 'left';
-	            }
-	        }
+	  validator.toggleRule = function (key) {
+	    if (_disabledRules[key]) {
+	      delete _disabledRules[key];
+	    } else {
+	      _disabledRules[key] = true;
 	    }
 
-	    editMenu.close = function () {
-
-	        context.map()
-	            .on('move.edit-menu', null)
-	            .on('drawn.edit-menu', null);
-
-	        _menu.remove();
-	        _tooltips = [];
+	    corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
+	    validator.validate();
+	  };
 
-	        dispatch$1.call('toggled', this, false);
-	    };
+	  validator.disableRules = function (keys) {
+	    _disabledRules = {};
+	    keys.forEach(function (k) {
+	      _disabledRules[k] = true;
+	    });
+	    corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
+	    validator.validate();
+	  };
 
-	    editMenu.anchorLoc = function(val) {
-	        if (!arguments.length) { return _anchorLoc; }
-	        _anchorLoc = val;
-	        _anchorLocLonLat = context.projection.invert(_anchorLoc);
-	        return editMenu;
-	    };
+	  validator.ignoreIssue = function (id) {
+	    _ignoredIssueIDs[id] = true;
+	  }; //
+	  // Run validation on a single entity for the given graph
+	  //
 
-	    editMenu.triggerType = function(val) {
-	        if (!arguments.length) { return _triggerType; }
-	        _triggerType = val;
-	        return editMenu;
-	    };
 
-	    editMenu.operations = function(val) {
-	        if (!arguments.length) { return _operations; }
-	        _operations = val;
-	        return editMenu;
-	    };
+	  function validateEntity(entity, graph) {
+	    var entityIssues = []; // runs validation and appends resulting issues
 
-	    return utilRebind(editMenu, dispatch$1, 'on');
-	}
+	    function runValidation(key) {
+	      var fn = _rules[key];
 
-	function uiFeatureInfo(context) {
-	    function update(selection) {
-	        var features = context.features();
-	        var stats = features.stats();
-	        var count = 0;
-	        var hiddenList = features.hidden().map(function(k) {
-	            if (stats[k]) {
-	                count += stats[k];
-	                return String(stats[k]) + ' ' + _t('feature.' + k + '.description');
-	            }
-	        }).filter(Boolean);
+	      if (typeof fn !== 'function') {
+	        console.error('no such validation rule = ' + key); // eslint-disable-line no-console
 
-	        selection.html('');
+	        return;
+	      }
 
-	        if (hiddenList.length) {
-	            var tooltipBehavior = uiTooltip()
-	                .placement('top')
-	                .title(function() {
-	                    return hiddenList.join('<br/>');
-	                });
+	      var detected = fn(entity, graph);
+	      entityIssues = entityIssues.concat(detected);
+	    } // run all rules
 
-	            selection.append('a')
-	                .attr('class', 'chip')
-	                .attr('href', '#')
-	                .attr('tabindex', -1)
-	                .html(_t('feature_info.hidden_warning', { count: count }))
-	                .call(tooltipBehavior)
-	                .on('click', function() {
-	                    tooltipBehavior.hide();
-	                    event.preventDefault();
-	                    // open the Map Data pane
-	                    context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
-	                });
-	        }
 
-	        selection
-	            .classed('hide', !hiddenList.length);
-	    }
+	    Object.keys(_rules).forEach(runValidation);
+	    return entityIssues;
+	  }
 
+	  function entityIDsToValidate(entityIDs, graph) {
+	    var processedIDs = new Set();
+	    return entityIDs.reduce(function (acc, entityID) {
+	      // keep redundancy check separate from `acc` because an `entityID`
+	      // could have been added to `acc` as a related entity through an earlier pass
+	      if (processedIDs.has(entityID)) return acc;
+	      processedIDs.add(entityID);
+	      var entity = graph.hasEntity(entityID);
+	      if (!entity) return acc;
+	      acc.add(entityID);
+	      var checkParentRels = [entity];
 
-	    return function(selection) {
-	        update(selection);
+	      if (entity.type === 'node') {
+	        graph.parentWays(entity).forEach(function (parentWay) {
+	          acc.add(parentWay.id); // include parent ways
 
-	        context.features().on('change.feature_info', function() {
-	            update(selection);
+	          checkParentRels.push(parentWay);
 	        });
-	    };
-	}
-
-	function uiFlash(context) {
-	    var _flashTimer;
+	      } else if (entity.type === 'relation') {
+	        entity.members.forEach(function (member) {
+	          acc.add(member.id); // include members
+	        });
+	      } else if (entity.type === 'way') {
+	        entity.nodes.forEach(function (nodeID) {
+	          acc.add(nodeID); // include child nodes
 
-	    var _duration = 2000;
-	    var _iconName = '#iD-icon-no';
-	    var _iconClass = 'disabled';
-	    var _text = '';
-	    var _textClass;
+	          graph._parentWays[nodeID].forEach(function (wayID) {
+	            acc.add(wayID); // include connected ways
+	          });
+	        });
+	      }
 
-	    function flash() {
-	        if (_flashTimer) {
-	            _flashTimer.stop();
+	      checkParentRels.forEach(function (entity) {
+	        // include parent relations
+	        if (entity.type !== 'relation') {
+	          // but not super-relations
+	          graph.parentRelations(entity).forEach(function (parentRelation) {
+	            acc.add(parentRelation.id);
+	          });
 	        }
+	      });
+	      return acc;
+	    }, new Set());
+	  } //
+	  // Run validation for several entities, supplied `entityIDs`,
+	  // against `graph` for the given `cache`
+	  //
 
-	        context.container().select('.main-footer-wrap')
-	            .classed('footer-hide', true)
-	            .classed('footer-show', false);
-	        context.container().select('.flash-wrap')
-	            .classed('footer-hide', false)
-	            .classed('footer-show', true);
 
-	        var content = context.container().select('.flash-wrap').selectAll('.flash-content')
-	            .data([0]);
+	  function validateEntities(entityIDs, graph, cache) {
+	    // clear caches for existing issues related to these entities
+	    entityIDs.forEach(cache.uncacheEntityID); // detect new issues and update caches
 
-	        // Enter
-	        var contentEnter = content.enter()
-	            .append('div')
-	            .attr('class', 'flash-content');
+	    entityIDs.forEach(function (entityID) {
+	      var entity = graph.hasEntity(entityID); // don't validate deleted entities
 
-	        var iconEnter = contentEnter
-	            .append('svg')
-	            .attr('class', 'flash-icon icon')
-	            .append('g')
-	            .attr('transform', 'translate(10,10)');
+	      if (!entity) return;
+	      var issues = validateEntity(entity, graph);
+	      cache.cacheIssues(issues);
+	    });
+	  } //
+	  // Validates anything that has changed since the last time it was run.
+	  // Also updates the "validatedGraph" to be the current graph
+	  // and dispatches a `validated` event when finished.
+	  //
 
-	        iconEnter
-	            .append('circle')
-	            .attr('r', 9);
 
-	        iconEnter
-	            .append('use')
-	            .attr('transform', 'translate(-7,-7)')
-	            .attr('width', '14')
-	            .attr('height', '14');
+	  validator.validate = function () {
+	    var currGraph = context.graph();
+	    _validatedGraph = _validatedGraph || context.history().base();
 
-	        contentEnter
-	            .append('div')
-	            .attr('class', 'flash-text');
+	    if (currGraph === _validatedGraph) {
+	      dispatch$1.call('validated');
+	      return;
+	    }
 
+	    var oldGraph = _validatedGraph;
+	    var difference = coreDifference(oldGraph, currGraph);
+	    _validatedGraph = currGraph;
+	    var createdAndModifiedEntityIDs = difference.extantIDs(true); // created/modified (true = w/relation members)
 
-	        // Update
-	        content = content
-	            .merge(contentEnter);
+	    var entityIDsToCheck = entityIDsToValidate(createdAndModifiedEntityIDs, currGraph); // check modified and deleted entities against the old graph in order to update their related entities
+	    // (e.g. deleting the only highway connected to a road should create a disconnected highway issue)
 
-	        content
-	            .selectAll('.flash-icon')
-	            .attr('class', 'icon flash-icon ' + (_iconClass || ''));
+	    var modifiedAndDeletedEntityIDs = difference.deleted().concat(difference.modified()).map(function (entity) {
+	      return entity.id;
+	    });
+	    var entityIDsToCheckForOldGraph = entityIDsToValidate(modifiedAndDeletedEntityIDs, oldGraph); // concat the sets
 
-	        content
-	            .selectAll('.flash-icon use')
-	            .attr('xlink:href', _iconName);
+	    entityIDsToCheckForOldGraph.forEach(entityIDsToCheck.add, entityIDsToCheck);
+	    validateEntities(entityIDsToCheck, context.graph(), _headCache);
+	    dispatch$1.call('validated');
+	  };
 
-	        content
-	            .selectAll('.flash-text')
-	            .attr('class', 'flash-text ' + (_textClass || ''))
-	            .text(_text);
+	  context.history().on('reset.validator', function () {
+	    // cached issues aren't valid any longer if the history has been reset
+	    reset(false);
+	    validator.validate();
+	  }); // WHEN TO RUN VALIDATION:
+	  // When graph changes:
 
+	  context.history().on('restore.validator', validator.validate) // restore saved history
+	  .on('undone.validator', validator.validate) // undo
+	  .on('redone.validator', validator.validate); // redo
+	  // but not on 'change' (e.g. while drawing)
+	  // When user changes editing modes:
 
-	        _flashTimer = d3_timeout(function() {
-	            _flashTimer = null;
-	            context.container().select('.main-footer-wrap')
-	                .classed('footer-hide', false)
-	                .classed('footer-show', true);
-	            context.container().select('.flash-wrap')
-	                .classed('footer-hide', true)
-	                .classed('footer-show', false);
-	        }, _duration);
+	  context.on('exit.validator', validator.validate); // When merging fetched data:
 
-	        return content;
-	    }
+	  context.history().on('merge.validator', function (entities) {
+	    if (!entities) return;
+	    var handle = window.requestIdleCallback(function () {
+	      var entityIDs = entities.map(function (entity) {
+	        return entity.id;
+	      });
+	      var headGraph = context.graph();
+	      validateEntities(entityIDsToValidate(entityIDs, headGraph), headGraph, _headCache);
+	      var baseGraph = context.history().base();
+	      validateEntities(entityIDsToValidate(entityIDs, baseGraph), baseGraph, _baseCache);
+	      dispatch$1.call('validated');
+	    });
 
+	    _deferred.add(handle);
+	  });
+	  return validator;
+	}
 
-	    flash.duration = function(_) {
-	        if (!arguments.length) { return _duration; }
-	        _duration = _;
-	        return flash;
-	    };
+	function validationCache() {
+	  var cache = {
+	    issuesByIssueID: {},
+	    // issue.id -> issue
+	    issuesByEntityID: {} // entity.id -> set(issue.id)
 
-	    flash.text = function(_) {
-	        if (!arguments.length) { return _text; }
-	        _text = _;
-	        return flash;
-	    };
+	  };
 
-	    flash.textClass = function(_) {
-	        if (!arguments.length) { return _textClass; }
-	        _textClass = _;
-	        return flash;
-	    };
+	  cache.cacheIssues = function (issues) {
+	    issues.forEach(function (issue) {
+	      var entityIds = issue.entityIds || [];
+	      entityIds.forEach(function (entityId) {
+	        if (!cache.issuesByEntityID[entityId]) {
+	          cache.issuesByEntityID[entityId] = new Set();
+	        }
 
-	    flash.iconName = function(_) {
-	        if (!arguments.length) { return _iconName; }
-	        _iconName = _;
-	        return flash;
-	    };
+	        cache.issuesByEntityID[entityId].add(issue.id);
+	      });
+	      cache.issuesByIssueID[issue.id] = issue;
+	    });
+	  };
 
-	    flash.iconClass = function(_) {
-	        if (!arguments.length) { return _iconClass; }
-	        _iconClass = _;
-	        return flash;
-	    };
+	  cache.uncacheIssue = function (issue) {
+	    // When multiple entities are involved (e.g. crossing_ways),
+	    // remove this issue from the other entity caches too..
+	    var entityIds = issue.entityIds || [];
+	    entityIds.forEach(function (entityId) {
+	      if (cache.issuesByEntityID[entityId]) {
+	        cache.issuesByEntityID[entityId]["delete"](issue.id);
+	      }
+	    });
+	    delete cache.issuesByIssueID[issue.id];
+	  };
 
-	    return flash;
-	}
+	  cache.uncacheIssues = function (issues) {
+	    issues.forEach(cache.uncacheIssue);
+	  };
 
-	function uiFullScreen(context) {
-	    var element = context.container().node();
-	    // var button = d3_select(null);
+	  cache.uncacheIssuesOfType = function (type) {
+	    var issuesOfType = Object.values(cache.issuesByIssueID).filter(function (issue) {
+	      return issue.type === type;
+	    });
+	    cache.uncacheIssues(issuesOfType);
+	  }; //
+	  // Remove a single entity and all its related issues from the caches
+	  //
 
 
-	    function getFullScreenFn() {
-	        if (element.requestFullscreen) {
-	            return element.requestFullscreen;
-	        } else if (element.msRequestFullscreen) {
-	            return element.msRequestFullscreen;
-	        } else if (element.mozRequestFullScreen) {
-	            return element.mozRequestFullScreen;
-	        } else if (element.webkitRequestFullscreen) {
-	            return element.webkitRequestFullscreen;
-	        }
-	    }
+	  cache.uncacheEntityID = function (entityID) {
+	    var issueIDs = cache.issuesByEntityID[entityID];
+	    if (!issueIDs) return;
+	    issueIDs.forEach(function (issueID) {
+	      var issue = cache.issuesByIssueID[issueID];
+
+	      if (issue) {
+	        cache.uncacheIssue(issue);
+	      } else {
+	        delete cache.issuesByIssueID[issueID];
+	      }
+	    });
+	    delete cache.issuesByEntityID[entityID];
+	  };
 
+	  return cache;
+	}
 
-	    function getExitFullScreenFn() {
-	        if (document.exitFullscreen) {
-	            return document.exitFullscreen;
-	        } else if (document.msExitFullscreen) {
-	            return document.msExitFullscreen;
-	        } else if (document.mozCancelFullScreen) {
-	            return document.mozCancelFullScreen;
-	        } else if (document.webkitExitFullscreen) {
-	            return document.webkitExitFullscreen;
-	        }
-	    }
+	function coreUploader(context) {
+	  var dispatch$1 = dispatch( // Start and end events are dispatched exactly once each per legitimate outside call to `save`
+	  'saveStarted', // dispatched as soon as a call to `save` has been deemed legitimate
+	  'saveEnded', // dispatched after the result event has been dispatched
+	  'willAttemptUpload', // dispatched before the actual upload call occurs, if it will
+	  'progressChanged', // Each save results in one of these outcomes:
+	  'resultNoChanges', // upload wasn't attempted since there were no edits
+	  'resultErrors', // upload failed due to errors
+	  'resultConflicts', // upload failed due to data conflicts
+	  'resultSuccess' // upload completed without errors
+	  );
+	  var _isSaving = false;
+	  var _conflicts = [];
+	  var _errors = [];
 
+	  var _origChanges;
 
-	    function isFullScreen() {
-	        return document.fullscreenElement ||
-	            document.mozFullScreenElement ||
-	            document.webkitFullscreenElement ||
-	            document.msFullscreenElement;
-	    }
+	  var _discardTags = {};
+	  _mainFileFetcher.get('discarded').then(function (d) {
+	    _discardTags = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  var uploader = utilRebind({}, dispatch$1, 'on');
 
+	  uploader.isSaving = function () {
+	    return _isSaving;
+	  };
 
-	    function isSupported() {
-	        return !!getFullScreenFn();
+	  uploader.save = function (changeset, tryAgain, checkConflicts) {
+	    // Guard against accidentally entering save code twice - #4641
+	    if (_isSaving && !tryAgain) {
+	      return;
 	    }
 
+	    var osm = context.connection();
+	    if (!osm) return; // If user somehow got logged out mid-save, try to reauthenticate..
+	    // This can happen if they were logged in from before, but the tokens are no longer valid.
 
-	    function fullScreen() {
-	        event.preventDefault();
-	        if (!isFullScreen()) {
-	            // button.classed('active', true);
-	            getFullScreenFn().apply(element);
-	        } else {
-	            // button.classed('active', false);
-	            getExitFullScreenFn().apply(document);
+	    if (!osm.authenticated()) {
+	      osm.authenticate(function (err) {
+	        if (!err) {
+	          uploader.save(changeset, tryAgain, checkConflicts); // continue where we left off..
 	        }
+	      });
+	      return;
 	    }
 
+	    if (!_isSaving) {
+	      _isSaving = true;
+	      dispatch$1.call('saveStarted', this);
+	    }
 
-	    return function() { // selection) {
-	        if (!isSupported()) { return; }
+	    var history = context.history();
+	    _conflicts = [];
+	    _errors = []; // Store original changes, in case user wants to download them as an .osc file
 
-	        // button = selection.append('button')
-	        //     .attr('title', t('full_screen'))
-	        //     .attr('tabindex', -1)
-	        //     .on('click', fullScreen)
-	        //     .call(tooltip);
+	    _origChanges = history.changes(actionDiscardTags(history.difference(), _discardTags)); // First time, `history.perform` a no-op action.
+	    // Any conflict resolutions will be done as `history.replace`
+	    // Remember to pop this later if needed
 
-	        // button.append('span')
-	        //     .attr('class', 'icon full-screen');
+	    if (!tryAgain) {
+	      history.perform(actionNoop());
+	    } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
 
-	        var detected = utilDetect();
-	        var keys = (detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11']);
-	        context.keybinding().on(keys, fullScreen);
-	    };
-	}
 
-	function uiGeolocate(context) {
-	    var _geolocationOptions = {
-	        // prioritize speed and power usage over precision
-	        enableHighAccuracy: false,
-	        // don't hang indefinitely getting the location
-	        timeout: 6000 // 6sec
-	    };
-	    var _locating = uiLoading(context).message(_t('geolocate.locating')).blocking(true);
-	    var _layer = context.layers().layer('geolocate');
-	    var _position;
-	    var _extent;
-	    var _timeoutID;
-	    var _button = select(null);
+	    if (!checkConflicts) {
+	      upload(changeset); // Do the full (slow) conflict check..
+	    } else {
+	      performFullConflictCheck(changeset);
+	    }
+	  };
 
-	    function click() {
-	        if (context.inIntro()) { return; }
-	        if (!_layer.enabled() && !_locating.isShown()) {
+	  function performFullConflictCheck(changeset) {
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var history = context.history();
+	    var localGraph = context.graph();
+	    var remoteGraph = coreGraph(history.base(), true);
+	    var summary = history.difference().summary();
+	    var _toCheck = [];
 
-	            // This timeout ensures that we still call finish() even if
-	            // the user declines to share their location in Firefox
-	            _timeoutID = setTimeout(error, 10000 /* 10sec */ );
+	    for (var i = 0; i < summary.length; i++) {
+	      var item = summary[i];
 
-	            context.container().call(_locating);
-	            // get the latest position even if we already have one
-	            navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
-	        } else {
-	            _locating.close();
-	            _layer.enabled(null, false);
-	            updateButtonState();
-	        }
+	      if (item.changeType === 'modified') {
+	        _toCheck.push(item.entity.id);
+	      }
 	    }
 
-	    function zoomTo() {
-	        context.enter(modeBrowse(context));
+	    var _toLoad = withChildNodes(_toCheck, localGraph);
 
-	        var map = context.map();
-	        _layer.enabled(_position, true);
-	        updateButtonState();
-	        map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
-	    }
+	    var _loaded = {};
+	    var _toLoadCount = 0;
+	    var _toLoadTotal = _toLoad.length;
 
-	    function success(geolocation) {
-	        _position = geolocation;
-	        var coords = _position.coords;
-	        _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
-	        zoomTo();
-	        finish();
-	    }
+	    if (_toCheck.length) {
+	      dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-	    function error() {
-	        if (_position) {
-	            // use the position from a previous call if we have one
-	            zoomTo();
-	        } else {
-	            context.ui().flash
-	                .text(_t('geolocate.location_unavailable'))
-	                .iconName('#iD-icon-geolocate')();
-	        }
+	      _toLoad.forEach(function (id) {
+	        _loaded[id] = false;
+	      });
 
-	        finish();
+	      osm.loadMultiple(_toLoad, loaded);
+	    } else {
+	      upload(changeset);
 	    }
 
-	    function finish() {
-	        _locating.close();  // unblock ui
-	        if (_timeoutID) { clearTimeout(_timeoutID); }
-	        _timeoutID = undefined;
-	    }
+	    return;
 
-	    function updateButtonState() {
-	        _button.classed('active', _layer.enabled());
-	    }
+	    function withChildNodes(ids, graph) {
+	      var s = new Set(ids);
+	      ids.forEach(function (id) {
+	        var entity = graph.entity(id);
+	        if (entity.type !== 'way') return;
+	        graph.childNodes(entity).forEach(function (child) {
+	          if (child.version !== undefined) {
+	            s.add(child.id);
+	          }
+	        });
+	      });
+	      return Array.from(s);
+	    } // Reload modified entities into an alternate graph and check for conflicts..
 
-	    return function(selection) {
-	        if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) { return; }
 
-	        _button = selection
-	            .append('button')
-	            .on('click', click)
-	            .call(svgIcon('#iD-icon-geolocate', 'light'))
-	            .call(uiTooltip()
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	                .title(_t('geolocate.title'))
-	                .keys([_t('geolocate.key')])
-	            );
+	    function loaded(err, result) {
+	      if (_errors.length) return;
 
-	        context.keybinding().on(_t('geolocate.key'), click);
-	    };
-	}
+	      if (err) {
+	        _errors.push({
+	          msg: err.message || err.responseText,
+	          details: [_t('save.status_code', {
+	            code: err.status
+	          })]
+	        });
 
-	function uiPanelBackground(context) {
-	    var background = context.background();
-	    var currSourceName = null;
-	    var metadata = {};
-	    var metadataKeys = [
-	        'zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'
-	    ];
+	        didResultInErrors();
+	      } else {
+	        var loadMore = [];
+	        result.data.forEach(function (entity) {
+	          remoteGraph.replace(entity);
+	          _loaded[entity.id] = true;
+	          _toLoad = _toLoad.filter(function (val) {
+	            return val !== entity.id;
+	          });
+	          if (!entity.visible) return; // Because loadMultiple doesn't download /full like loadEntity,
+	          // need to also load children that aren't already being checked..
+
+	          var i, id;
 
-	    var debouncedRedraw = debounce(redraw, 250);
+	          if (entity.type === 'way') {
+	            for (i = 0; i < entity.nodes.length; i++) {
+	              id = entity.nodes[i];
+
+	              if (_loaded[id] === undefined) {
+	                _loaded[id] = false;
+	                loadMore.push(id);
+	              }
+	            }
+	          } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+	            for (i = 0; i < entity.members.length; i++) {
+	              id = entity.members[i].id;
 
-	    function redraw(selection) {
-	        var source = background.baseLayerSource();
-	        if (!source) { return; }
+	              if (_loaded[id] === undefined) {
+	                _loaded[id] = false;
+	                loadMore.push(id);
+	              }
+	            }
+	          }
+	        });
+	        _toLoadCount += result.data.length;
+	        _toLoadTotal += loadMore.length;
+	        dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-	        var isDG = (source.id.match(/^DigitalGlobe/i) !== null);
+	        if (loadMore.length) {
+	          _toLoad.push.apply(_toLoad, loadMore);
 
-	        if (currSourceName !== source.name()) {
-	            currSourceName = source.name();
-	            metadata = {};
+	          osm.loadMultiple(loadMore, loaded);
 	        }
 
-	        selection.html('');
+	        if (!_toLoad.length) {
+	          detectConflicts();
+	          upload(changeset);
+	        }
+	      }
+	    }
 
-	        var list = selection
-	            .append('ul')
-	            .attr('class', 'background-info');
-
-	        list
-	            .append('li')
-	            .text(currSourceName);
-
-	        metadataKeys.forEach(function(k) {
-	            // DigitalGlobe vintage is available in raster layers for now.
-	            if (isDG && k === 'vintage') { return; }
-
-	            list
-	                .append('li')
-	                .attr('class', 'background-info-list-' + k)
-	                .classed('hide', !metadata[k])
-	                .text(_t('info_panels.background.' + k) + ':')
-	                .append('span')
-	                .attr('class', 'background-info-span-' + k)
-	                .text(metadata[k]);
-	        });
+	    function detectConflicts() {
+	      function choice(id, text, _action) {
+	        return {
+	          id: id,
+	          text: text,
+	          action: function action() {
+	            history.replace(_action);
+	          }
+	        };
+	      }
+
+	      function formatUser(d) {
+	        return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
+	      }
 
-	        debouncedGetMetadata(selection);
+	      function entityName(entity) {
+	        return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
+	      }
 
-	        var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
+	      function sameVersions(local, remote) {
+	        if (local.version !== remote.version) return false;
 
-	        selection
-	            .append('a')
-	            .text(_t('info_panels.background.' + toggleTiles))
-	            .attr('href', '#')
-	            .attr('class', 'button button-toggle-tiles')
-	            .on('click', function() {
-	                event.preventDefault();
-	                context.setDebug('tile', !context.getDebug('tile'));
-	                selection.call(redraw);
-	            });
+	        if (local.type === 'way') {
+	          var children = utilArrayUnion(local.nodes, remote.nodes);
 
-	        if (isDG) {
-	            var key = source.id + '-vintage';
-	            var sourceVintage = context.background().findSource(key);
-	            var showsVintage = context.background().showsLayer(sourceVintage);
-	            var toggleVintage = showsVintage ? 'hide_vintage' : 'show_vintage';
-	            selection
-	                .append('a')
-	                .text(_t('info_panels.background.' + toggleVintage))
-	                .attr('href', '#')
-	                .attr('class', 'button button-toggle-vintage')
-	                .on('click', function() {
-	                    event.preventDefault();
-	                    context.background().toggleOverlayLayer(sourceVintage);
-	                    selection.call(redraw);
-	                });
+	          for (var i = 0; i < children.length; i++) {
+	            var a = localGraph.hasEntity(children[i]);
+	            var b = remoteGraph.hasEntity(children[i]);
+	            if (a && b && a.version !== b.version) return false;
+	          }
 	        }
 
-	        // disable if necessary
-	        ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function(layerId) {
-	            if (source.id !== layerId) {
-	                var key = layerId + '-vintage';
-	                var sourceVintage = context.background().findSource(key);
-	                if (context.background().showsLayer(sourceVintage)) {
-	                    context.background().toggleOverlayLayer(sourceVintage);
-	                }
-	            }
+	        return true;
+	      }
+
+	      _toCheck.forEach(function (id) {
+	        var local = localGraph.entity(id);
+	        var remote = remoteGraph.entity(id);
+	        if (sameVersions(local, remote)) return;
+	        var merge = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags, formatUser);
+	        history.replace(merge);
+	        var mergeConflicts = merge.conflicts();
+	        if (!mergeConflicts.length) return; // merged safely
+
+	        var forceLocal = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_local');
+	        var forceRemote = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_remote');
+	        var keepMine = _t('save.conflict.' + (remote.visible ? 'keep_local' : 'restore'));
+	        var keepTheirs = _t('save.conflict.' + (remote.visible ? 'keep_remote' : 'delete'));
+
+	        _conflicts.push({
+	          id: id,
+	          name: entityName(local),
+	          details: mergeConflicts,
+	          chosen: 1,
+	          choices: [choice(id, keepMine, forceLocal), choice(id, keepTheirs, forceRemote)]
 	        });
+	      });
 	    }
+	  }
 
+	  function upload(changeset) {
+	    var osm = context.connection();
 
-	    var debouncedGetMetadata = debounce(getMetadata, 250);
+	    if (!osm) {
+	      _errors.push({
+	        msg: 'No OSM Service'
+	      });
+	    }
 
-	    function getMetadata(selection) {
-	        var tile = context.container().select('.layer-background img.tile-center');   // tile near viewport center
-	        if (tile.empty()) { return; }
+	    if (_conflicts.length) {
+	      didResultInConflicts(changeset);
+	    } else if (_errors.length) {
+	      didResultInErrors();
+	    } else {
+	      var history = context.history();
+	      var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
 
-	        var sourceName = currSourceName;
-	        var d = tile.datum();
-	        var zoom = (d && d.length >= 3 && d[2]) || Math.floor(context.map().zoom());
-	        var center = context.map().center();
+	      if (changes.modified.length || changes.created.length || changes.deleted.length) {
+	        dispatch$1.call('willAttemptUpload', this);
+	        osm.putChangeset(changeset, changes, uploadCallback);
+	      } else {
+	        // changes were insignificant or reverted by user
+	        didResultInNoChanges();
+	      }
+	    }
+	  }
 
-	        // update zoom
-	        metadata.zoom = String(zoom);
-	        selection.selectAll('.background-info-list-zoom')
-	            .classed('hide', false)
-	            .selectAll('.background-info-span-zoom')
-	            .text(metadata.zoom);
-
-	        if (!d || !d.length >= 3) { return; }
-
-	        background.baseLayerSource().getMetadata(center, d, function(err, result) {
-	            if (err || currSourceName !== sourceName) { return; }
-
-	            // update vintage
-	            var vintage = result.vintage;
-	            metadata.vintage = (vintage && vintage.range) || _t('info_panels.background.unknown');
-	            selection.selectAll('.background-info-list-vintage')
-	                .classed('hide', false)
-	                .selectAll('.background-info-span-vintage')
-	                .text(metadata.vintage);
-
-	            // update other metdata
-	            metadataKeys.forEach(function(k) {
-	                if (k === 'zoom' || k === 'vintage') { return; }  // done already
-	                var val = result[k];
-	                metadata[k] = val;
-	                selection.selectAll('.background-info-list-' + k)
-	                    .classed('hide', !val)
-	                    .selectAll('.background-info-span-' + k)
-	                    .text(val);
-	            });
+	  function uploadCallback(err, changeset) {
+	    if (err) {
+	      if (err.status === 409) {
+	        // 409 Conflict
+	        uploader.save(changeset, true, true); // tryAgain = true, checkConflicts = true
+	      } else {
+	        _errors.push({
+	          msg: err.message || err.responseText,
+	          details: [_t('save.status_code', {
+	            code: err.status
+	          })]
 	        });
+
+	        didResultInErrors();
+	      }
+	    } else {
+	      didResultInSuccess(changeset);
 	    }
+	  }
 
+	  function didResultInNoChanges() {
+	    dispatch$1.call('resultNoChanges', this);
+	    endSave();
+	    context.flush(); // reset iD
+	  }
 
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	  function didResultInErrors() {
+	    context.history().pop();
+	    dispatch$1.call('resultErrors', this, _errors);
+	    endSave();
+	  }
 
-	        context.map()
-	            .on('drawn.info-background', function() {
-	                selection.call(debouncedRedraw);
-	            })
-	            .on('move.info-background', function() {
-	                selection.call(debouncedGetMetadata);
-	            });
+	  function didResultInConflicts(changeset) {
+	    _conflicts.sort(function (a, b) {
+	      return b.id.localeCompare(a.id);
+	    });
 
-	    };
+	    dispatch$1.call('resultConflicts', this, changeset, _conflicts, _origChanges);
+	    endSave();
+	  }
 
-	    panel.off = function() {
-	        context.map()
-	            .on('drawn.info-background', null)
-	            .on('move.info-background', null);
-	    };
+	  function didResultInSuccess(changeset) {
+	    // delete the edit stack cached to local storage
+	    context.history().clearSaved();
+	    dispatch$1.call('resultSuccess', this, changeset); // Add delay to allow for postgres replication #1646 #2678
 
-	    panel.id = 'background';
-	    panel.title = _t('info_panels.background.title');
-	    panel.key = _t('info_panels.background.key');
+	    window.setTimeout(function () {
+	      endSave();
+	      context.flush(); // reset iD
+	    }, 2500);
+	  }
 
+	  function endSave() {
+	    _isSaving = false;
+	    dispatch$1.call('saveEnded', this);
+	  }
 
-	    return panel;
-	}
+	  uploader.cancelConflictResolution = function () {
+	    context.history().pop();
+	  };
 
-	function uiPanelHistory(context) {
-	    var osm;
+	  uploader.processResolvedConflicts = function (changeset) {
+	    var history = context.history();
 
-	    function displayTimestamp(timestamp) {
-	        if (!timestamp) { return _t('info_panels.history.unknown'); }
-	        var options = {
-	            day: 'numeric', month: 'short', year: 'numeric',
-	            hour: 'numeric', minute: 'numeric', second: 'numeric'
-	        };
-	        var d = new Date(timestamp);
-	        if (isNaN(d.getTime())) { return _t('info_panels.history.unknown'); }
-	        return d.toLocaleString(_mainLocalizer.localeCode(), options);
-	    }
+	    for (var i = 0; i < _conflicts.length; i++) {
+	      if (_conflicts[i].chosen === 1) {
+	        // user chose "use theirs"
+	        var entity = context.hasEntity(_conflicts[i].id);
 
+	        if (entity && entity.type === 'way') {
+	          var children = utilArrayUniq(entity.nodes);
 
-	    function displayUser(selection, userName) {
-	        if (!userName) {
-	            selection
-	                .append('span')
-	                .text(_t('info_panels.history.unknown'));
-	            return;
+	          for (var j = 0; j < children.length; j++) {
+	            history.replace(actionRevert(children[j]));
+	          }
 	        }
 
-	        selection
-	            .append('span')
-	            .attr('class', 'user-name')
-	            .text(userName);
+	        history.replace(actionRevert(_conflicts[i].id));
+	      }
+	    }
 
-	        var links = selection
-	            .append('div')
-	            .attr('class', 'links');
+	    uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
+	  };
 
-	        if (osm) {
-	            links
-	                .append('a')
-	                .attr('class', 'user-osm-link')
-	                .attr('href', osm.userURL(userName))
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .text('OSM');
-	        }
-
-	        links
-	            .append('a')
-	            .attr('class', 'user-hdyc-link')
-	            .attr('href', 'https://hdyc.neis-one.org/?' + userName)
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .text('HDYC');
-	    }
-
-
-	    function displayChangeset(selection, changeset) {
-	        if (!changeset) {
-	            selection
-	                .append('span')
-	                .text(_t('info_panels.history.unknown'));
-	            return;
-	        }
+	  uploader.reset = function () {};
 
-	        selection
-	            .append('span')
-	            .attr('class', 'changeset-id')
-	            .text(changeset);
+	  return uploader;
+	}
 
-	        var links = selection
-	            .append('div')
-	            .attr('class', 'links');
+	var abs$4 = Math.abs;
+	var exp$2 = Math.exp;
+	var E = Math.E;
 
-	        if (osm) {
-	            links
-	                .append('a')
-	                .attr('class', 'changeset-osm-link')
-	                .attr('href', osm.changesetURL(changeset))
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .text('OSM');
-	        }
-
-	        links
-	            .append('a')
-	            .attr('class', 'changeset-osmcha-link')
-	            .attr('href', 'https://osmcha.org/changesets/' + changeset)
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .text('OSMCha');
-
-	        links
-	            .append('a')
-	            .attr('class', 'changeset-achavi-link')
-	            .attr('href', 'https://overpass-api.de/achavi/?changeset=' + changeset)
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .text('Achavi');
-	    }
-
-
-	    function redraw(selection) {
-	        var selectedNoteID = context.selectedNoteID();
-	        osm = context.connection();
-
-	        var selected, note, entity;
-	        if (selectedNoteID && osm) {       // selected 1 note
-	            selected = [ _t('note.note') + ' ' + selectedNoteID ];
-	            note = osm.getNote(selectedNoteID);
-	        } else {                           // selected 1..n entities
-	            selected = context.selectedIDs()
-	                .filter(function(e) { return context.hasEntity(e); });
-	            if (selected.length) {
-	                entity = context.entity(selected[0]);
-	            }
-	        }
+	var FORCED$g = fails(function () {
+	  return Math.sinh(-2e-17) != -2e-17;
+	});
 
-	        var singular = selected.length === 1 ? selected[0] : null;
+	// `Math.sinh` method
+	// https://tc39.github.io/ecma262/#sec-math.sinh
+	// V8 near Chromium 38 has a problem with very small numbers
+	_export({ target: 'Math', stat: true, forced: FORCED$g }, {
+	  sinh: function sinh(x) {
+	    return abs$4(x = +x) < 1 ? (mathExpm1(x) - mathExpm1(-x)) / 2 : (exp$2(x - 1) - exp$2(-x - 1)) * (E / 2);
+	  }
+	});
 
-	        selection.html('');
+	var isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2; // listen for DPI change, e.g. when dragging a browser window from a retina to non-retina screen
 
-	        selection
-	            .append('h4')
-	            .attr('class', 'history-heading')
-	            .text(singular || _t('info_panels.history.selected', { n: selected.length }));
+	window.matchMedia("\n        (-webkit-min-device-pixel-ratio: 2), /* Safari */\n        (min-resolution: 2dppx),             /* standard */\n        (min-resolution: 192dpi)             /* fallback */\n    ").addListener(function () {
+	  isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
+	});
 
-	        if (!singular) { return; }
+	function localeDateString(s) {
+	  if (!s) return null;
+	  var options = {
+	    day: 'numeric',
+	    month: 'short',
+	    year: 'numeric'
+	  };
+	  var d = new Date(s);
+	  if (isNaN(d.getTime())) return null;
+	  return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	}
 
-	        if (entity) {
-	            selection.call(redrawEntity, entity);
-	        } else if (note) {
-	            selection.call(redrawNote, note);
-	        }
-	    }
+	function vintageRange(vintage) {
+	  var s;
 
+	  if (vintage.start || vintage.end) {
+	    s = vintage.start || '?';
 
-	    function redrawNote(selection, note) {
-	        if (!note || note.isNew()) {
-	            selection
-	                .append('div')
-	                .text(_t('info_panels.history.note_no_history'));
-	            return;
-	        }
+	    if (vintage.start !== vintage.end) {
+	      s += ' - ' + (vintage.end || '?');
+	    }
+	  }
 
-	        var list = selection
-	            .append('ul');
+	  return s;
+	}
 
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.note_comments') + ':')
-	            .append('span')
-	            .text(note.comments.length);
+	function rendererBackgroundSource(data) {
+	  var source = Object.assign({}, data); // shallow copy
 
-	        if (note.comments.length) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.history.note_created_date') + ':')
-	                .append('span')
-	                .text(displayTimestamp(note.comments[0].date));
+	  var _offset = [0, 0];
+	  var _name = source.name;
+	  var _description = source.description;
 
-	            list
-	                .append('li')
-	                .text(_t('info_panels.history.note_created_user') + ':')
-	                .call(displayUser, note.comments[0].user);
-	        }
+	  var _best = !!source.best;
 
-	        if (osm) {
-	            selection
-	                .append('a')
-	                .attr('class', 'view-history-on-osm')
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .attr('href', osm.noteURL(note))
-	                .call(svgIcon('#iD-icon-out-link', 'inline'))
-	                .append('span')
-	                .text(_t('info_panels.history.note_link_text'));
-	        }
-	    }
+	  var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
 
+	  source.tileSize = data.tileSize || 256;
+	  source.zoomExtent = data.zoomExtent || [0, 22];
+	  source.overzoom = data.overzoom !== false;
 
-	    function redrawEntity(selection, entity) {
-	        if (!entity || entity.isNew()) {
-	            selection
-	                .append('div')
-	                .text(_t('info_panels.history.no_history'));
-	            return;
-	        }
+	  source.offset = function (val) {
+	    if (!arguments.length) return _offset;
+	    _offset = val;
+	    return source;
+	  };
 
-	        var links = selection
-	            .append('div')
-	            .attr('class', 'links');
+	  source.nudge = function (val, zoomlevel) {
+	    _offset[0] += val[0] / Math.pow(2, zoomlevel);
+	    _offset[1] += val[1] / Math.pow(2, zoomlevel);
+	    return source;
+	  };
 
-	        if (osm) {
-	            links
-	                .append('a')
-	                .attr('class', 'view-history-on-osm')
-	                .attr('href', osm.historyURL(entity))
-	                .attr('target', '_blank')
-	                .attr('tabindex', -1)
-	                .attr('title', _t('info_panels.history.link_text'))
-	                .text('OSM');
-	        }
-	        links
-	            .append('a')
-	            .attr('class', 'pewu-history-viewer-link')
-	            .attr('href', 'https://pewu.github.io/osm-history/#/' + entity.type + '/' + entity.osmId())
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .text('PeWu');
-
-	        var list = selection
-	            .append('ul');
-
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.version') + ':')
-	            .append('span')
-	            .text(entity.version);
-
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.last_edit') + ':')
-	            .append('span')
-	            .text(displayTimestamp(entity.timestamp));
-
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.edited_by') + ':')
-	            .call(displayUser, entity.user);
-
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.changeset') + ':')
-	            .call(displayChangeset, entity.changeset);
-	    }
-
-
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	  source.name = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t('imagery.' + id_safe + '.name', {
+	      "default": _name
+	    });
+	  };
 
-	        context.map()
-	            .on('drawn.info-history', function() {
-	                selection.call(redraw);
-	            });
+	  source.label = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t.html('imagery.' + id_safe + '.name', {
+	      "default": _name
+	    });
+	  };
 
-	        context
-	            .on('enter.info-history', function() {
-	                selection.call(redraw);
-	            });
-	    };
+	  source.description = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t.html('imagery.' + id_safe + '.description', {
+	      "default": _description
+	    });
+	  };
 
-	    panel.off = function() {
-	        context.map().on('drawn.info-history', null);
-	        context.on('enter.info-history', null);
-	    };
+	  source.best = function () {
+	    return _best;
+	  };
 
-	    panel.id = 'history';
-	    panel.title = _t('info_panels.history.title');
-	    panel.key = _t('info_panels.history.key');
+	  source.area = function () {
+	    if (!data.polygon) return Number.MAX_VALUE; // worldwide
+
+	    var area = d3_geoArea({
+	      type: 'MultiPolygon',
+	      coordinates: [data.polygon]
+	    });
+	    return isNaN(area) ? 0 : area;
+	  };
 
+	  source.imageryUsed = function () {
+	    return _name || source.id;
+	  };
 
-	    return panel;
-	}
+	  source.template = function (val) {
+	    if (!arguments.length) return _template;
 
-	var OSM_PRECISION = 7;
+	    if (source.id === 'custom') {
+	      _template = val;
+	    }
 
-	/**
-	 * Returns a localized representation of the given length measurement.
-	 *
-	 * @param {Number} m area in meters
-	 * @param {Boolean} isImperial true for U.S. customary units; false for metric
-	 */
-	function displayLength(m, isImperial) {
-	    var d = m * (isImperial ? 3.28084 : 1);
-	    var unit;
+	    return source;
+	  };
 
-	    if (isImperial) {
-	        if (d >= 5280) {
-	            d /= 5280;
-	            unit = 'miles';
-	        } else {
-	            unit = 'feet';
-	        }
-	    } else {
-	        if (d >= 1000) {
-	            d /= 1000;
-	            unit = 'kilometers';
-	        } else {
-	            unit = 'meters';
-	        }
+	  source.url = function (coord) {
+	    var result = _template;
+	    if (result === '') return result; // source 'none'
+	    // Guess a type based on the tokens present in the template
+	    // (This is for 'custom' source, where we don't know)
+
+	    if (!source.type) {
+	      if (/SERVICE=WMS|\{(proj|wkid|bbox)\}/.test(_template)) {
+	        source.type = 'wms';
+	        source.projection = 'EPSG:3857'; // guess
+	      } else if (/\{(x|y)\}/.test(_template)) {
+	        source.type = 'tms';
+	      } else if (/\{u\}/.test(_template)) {
+	        source.type = 'bing';
+	      }
 	    }
 
-	    return _t('units.' + unit, {
-	        quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
-	            maximumSignificantDigits: 4
-	        })
-	    });
-	}
+	    if (source.type === 'wms') {
+	      var tileToProjectedCoords = function tileToProjectedCoords(x, y, z) {
+	        //polyfill for IE11, PhantomJS
+	        var sinh = Math.sinh || function (x) {
+	          var y = Math.exp(x);
+	          return (y - 1 / y) / 2;
+	        };
 
-	/**
-	 * Returns a localized representation of the given area measurement.
-	 *
-	 * @param {Number} m2 area in square meters
-	 * @param {Boolean} isImperial true for U.S. customary units; false for metric
-	 */
-	function displayArea(m2, isImperial) {
-	    var locale = _mainLocalizer.localeCode();
-	    var d = m2 * (isImperial ? 10.7639111056 : 1);
-	    var d1, d2, area;
-	    var unit1 = '';
-	    var unit2 = '';
+	        var zoomSize = Math.pow(2, z);
+	        var lon = x / zoomSize * Math.PI * 2 - Math.PI;
+	        var lat = Math.atan(sinh(Math.PI * (1 - 2 * y / zoomSize)));
 
-	    if (isImperial) {
-	        if (d >= 6969600) { // > 0.25mi² show mi²
-	            d1 = d / 27878400;
-	            unit1 = 'square_miles';
-	        } else {
-	            d1 = d;
-	            unit1 = 'square_feet';
-	        }
+	        switch (source.projection) {
+	          case 'EPSG:4326':
+	            return {
+	              x: lon * 180 / Math.PI,
+	              y: lat * 180 / Math.PI
+	            };
 
-	        if (d > 4356 && d < 43560000) { // 0.1 - 1000 acres
-	            d2 = d / 43560;
-	            unit2 = 'acres';
+	          default:
+	            // EPSG:3857 and synonyms
+	            var mercCoords = mercatorRaw(lon, lat);
+	            return {
+	              x: 20037508.34 / Math.PI * mercCoords[0],
+	              y: 20037508.34 / Math.PI * mercCoords[1]
+	            };
 	        }
+	      };
 
-	    } else {
-	        if (d >= 250000) { // > 0.25km² show km²
-	            d1 = d / 1000000;
-	            unit1 = 'square_kilometers';
-	        } else {
-	            d1 = d;
-	            unit1 = 'square_meters';
-	        }
+	      var tileSize = source.tileSize;
+	      var projection = source.projection;
+	      var minXmaxY = tileToProjectedCoords(coord[0], coord[1], coord[2]);
+	      var maxXminY = tileToProjectedCoords(coord[0] + 1, coord[1] + 1, coord[2]);
+	      result = result.replace(/\{(\w+)\}/g, function (token, key) {
+	        switch (key) {
+	          case 'width':
+	          case 'height':
+	            return tileSize;
+
+	          case 'proj':
+	            return projection;
+
+	          case 'wkid':
+	            return projection.replace(/^EPSG:/, '');
+
+	          case 'bbox':
+	            // WMS 1.3 flips x/y for some coordinate systems including EPSG:4326 - #7557
+	            if (projection === 'EPSG:4326' && // The CRS parameter implies version 1.3 (prior versions use SRS)
+	            /VERSION=1.3|CRS={proj}/.test(source.template())) {
+	              return maxXminY.y + ',' + minXmaxY.x + ',' + minXmaxY.y + ',' + maxXminY.x;
+	            } else {
+	              return minXmaxY.x + ',' + maxXminY.y + ',' + maxXminY.x + ',' + minXmaxY.y;
+	            }
+
+	          case 'w':
+	            return minXmaxY.x;
+
+	          case 's':
+	            return maxXminY.y;
 
-	        if (d > 1000 && d < 10000000) { // 0.1 - 1000 hectares
-	            d2 = d / 10000;
-	            unit2 = 'hectares';
+	          case 'n':
+	            return maxXminY.x;
+
+	          case 'e':
+	            return minXmaxY.y;
+
+	          default:
+	            return token;
 	        }
-	    }
+	      });
+	    } else if (source.type === 'tms') {
+	      result = result.replace('{x}', coord[0]).replace('{y}', coord[1]) // TMS-flipped y coordinate
+	      .replace(/\{[t-]y\}/, Math.pow(2, coord[2]) - coord[1] - 1).replace(/\{z(oom)?\}/, coord[2]) // only fetch retina tiles for retina screens
+	      .replace(/\{@2x\}|\{r\}/, isRetina ? '@2x' : '');
+	    } else if (source.type === 'bing') {
+	      result = result.replace('{u}', function () {
+	        var u = '';
+
+	        for (var zoom = coord[2]; zoom > 0; zoom--) {
+	          var b = 0;
+	          var mask = 1 << zoom - 1;
+	          if ((coord[0] & mask) !== 0) b++;
+	          if ((coord[1] & mask) !== 0) b += 2;
+	          u += b.toString();
+	        }
+
+	        return u;
+	      });
+	    } // these apply to any type..
 
-	    area = _t('units.' + unit1, {
-	        quantity: d1.toLocaleString(locale, {
-	            maximumSignificantDigits: 4
-	        })
+
+	    result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
+	      var subdomains = r.split(',');
+	      return subdomains[(coord[0] + coord[1]) % subdomains.length];
 	    });
+	    return result;
+	  };
 
-	    if (d2) {
-	        return _t('units.area_pair', {
-	            area1: area,
-	            area2: _t('units.' + unit2, {
-	                quantity: d2.toLocaleString(locale, {
-	                    maximumSignificantDigits: 2
-	                })
-	            })
-	        });
-	    } else {
-	        return area;
-	    }
-	}
+	  source.validZoom = function (z) {
+	    return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
+	  };
 
-	function wrap(x, min, max) {
-	    var d = max - min;
-	    return ((x - min) % d + d) % d + min;
-	}
+	  source.isLocatorOverlay = function () {
+	    return source.id === 'mapbox_locator_overlay';
+	  };
+	  /* hides a source from the list, but leaves it available for use */
 
-	function clamp$1(x, min, max) {
-	    return Math.max(min, Math.min(x, max));
-	}
 
-	function displayCoordinate(deg, pos, neg) {
-	    var locale = _mainLocalizer.localeCode();
-	    var min = (Math.abs(deg) - Math.floor(Math.abs(deg))) * 60;
-	    var sec = (min - Math.floor(min)) * 60;
-	    var displayDegrees = _t('units.arcdegrees', {
-	        quantity: Math.floor(Math.abs(deg)).toLocaleString(locale)
-	    });
-	    var displayCoordinate;
-
-	    if (Math.floor(sec) > 0) {
-	        displayCoordinate = displayDegrees +
-	            _t('units.arcminutes', {
-	                quantity: Math.floor(min).toLocaleString(locale)
-	            }) +
-	            _t('units.arcseconds', {
-	                quantity: Math.round(sec).toLocaleString(locale)
-	            });
-	    } else if (Math.floor(min) > 0) {
-	        displayCoordinate = displayDegrees +
-	            _t('units.arcminutes', {
-	                quantity: Math.round(min).toLocaleString(locale)
-	            });
-	    } else {
-	        displayCoordinate = _t('units.arcdegrees', {
-	            quantity: Math.round(Math.abs(deg)).toLocaleString(locale)
-	        });
-	    }
+	  source.isHidden = function () {
+	    return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
+	  };
 
-	    if (deg === 0) {
-	        return displayCoordinate;
-	    } else {
-	        return _t('units.coordinate', {
-	            coordinate: displayCoordinate,
-	            direction: _t('units.' + (deg > 0 ? pos : neg))
-	        });
-	    }
-	}
+	  source.copyrightNotices = function () {};
 
-	/**
-	 * Returns given coordinate pair in degree-minute-second format.
-	 *
-	 * @param {Array<Number>} coord longitude and latitude
-	 */
-	function dmsCoordinatePair(coord) {
-	    return _t('units.coordinate_pair', {
-	        latitude: displayCoordinate(clamp$1(coord[1], -90, 90), 'north', 'south'),
-	        longitude: displayCoordinate(wrap(coord[0], -180, 180), 'east', 'west')
-	    });
-	}
+	  source.getMetadata = function (center, tileCoord, callback) {
+	    var vintage = {
+	      start: localeDateString(source.startDate),
+	      end: localeDateString(source.endDate)
+	    };
+	    vintage.range = vintageRange(vintage);
+	    var metadata = {
+	      vintage: vintage
+	    };
+	    callback(null, metadata);
+	  };
 
-	/**
-	 * Returns the given coordinate pair in decimal format.
-	 * note: unlocalized to avoid comma ambiguity - see #4765
-	 *
-	 * @param {Array<Number>} coord longitude and latitude
-	 */
-	function decimalCoordinatePair(coord) {
-	    return _t('units.coordinate_pair', {
-	        latitude: clamp$1(coord[1], -90, 90).toFixed(OSM_PRECISION),
-	        longitude: wrap(coord[0], -180, 180).toFixed(OSM_PRECISION)
-	    });
+	  return source;
 	}
 
-	function uiPanelLocation(context) {
-	    var currLocation = '';
+	rendererBackgroundSource.Bing = function (data, dispatch) {
+	  // http://msdn.microsoft.com/en-us/library/ff701716.aspx
+	  // http://msdn.microsoft.com/en-us/library/ff701701.aspx
+	  data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&mkt=en-gb&n=z';
+	  var bing = rendererBackgroundSource(data); // var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc
 
+	  var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD
 
-	    function redraw(selection) {
-	        selection.html('');
+	  var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&key=' + key;
+	  var cache = {};
+	  var inflight = {};
+	  var providers = [];
+	  d3_json(url).then(function (json) {
+	    providers = json.resourceSets[0].resources[0].imageryProviders.map(function (provider) {
+	      return {
+	        attribution: provider.attribution,
+	        areas: provider.coverageAreas.map(function (area) {
+	          return {
+	            zoom: [area.zoomMin, area.zoomMax],
+	            extent: geoExtent([area.bbox[1], area.bbox[0]], [area.bbox[3], area.bbox[2]])
+	          };
+	        })
+	      };
+	    });
+	    dispatch.call('change');
+	  })["catch"](function () {
+	    /* ignore */
+	  });
 
-	        var list = selection
-	            .append('ul');
+	  bing.copyrightNotices = function (zoom, extent) {
+	    zoom = Math.min(zoom, 21);
+	    return providers.filter(function (provider) {
+	      return provider.areas.some(function (area) {
+	        return extent.intersects(area.extent) && area.zoom[0] <= zoom && area.zoom[1] >= zoom;
+	      });
+	    }).map(function (provider) {
+	      return provider.attribution;
+	    }).join(', ');
+	  };
 
-	        // Mouse coordinates
-	        var coord = context.map().mouseCoordinates();
-	        if (coord.some(isNaN)) {
-	            coord = context.map().center();
-	        }
+	  bing.getMetadata = function (center, tileCoord, callback) {
+	    var tileID = tileCoord.slice(0, 3).join('/');
+	    var zoom = Math.min(tileCoord[2], 21);
+	    var centerPoint = center[1] + ',' + center[0]; // lat,lng
 
-	        list
-	            .append('li')
-	            .text(dmsCoordinatePair(coord))
-	            .append('li')
-	            .text(decimalCoordinatePair(coord));
+	    var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
+	    if (inflight[tileID]) return;
 
-	        // Location Info
-	        selection
-	            .append('div')
-	            .attr('class', 'location-info')
-	            .text(currLocation || ' ');
+	    if (!cache[tileID]) {
+	      cache[tileID] = {};
+	    }
 
-	        debouncedGetLocation(selection, coord);
+	    if (cache[tileID] && cache[tileID].metadata) {
+	      return callback(null, cache[tileID].metadata);
 	    }
 
+	    inflight[tileID] = true;
+	    d3_json(url).then(function (result) {
+	      delete inflight[tileID];
 
-	    var debouncedGetLocation = debounce(getLocation, 250);
-	    function getLocation(selection, coord) {
-	        if (!services.geocoder) {
-	            currLocation = _t('info_panels.location.unknown_location');
-	            selection.selectAll('.location-info')
-	                .text(currLocation);
-	        } else {
-	            services.geocoder.reverse(coord, function(err, result) {
-	                currLocation = result ? result.display_name : _t('info_panels.location.unknown_location');
-	                selection.selectAll('.location-info')
-	                    .text(currLocation);
-	            });
-	        }
-	    }
+	      if (!result) {
+	        throw new Error('Unknown Error');
+	      }
 
+	      var vintage = {
+	        start: localeDateString(result.resourceSets[0].resources[0].vintageStart),
+	        end: localeDateString(result.resourceSets[0].resources[0].vintageEnd)
+	      };
+	      vintage.range = vintageRange(vintage);
+	      var metadata = {
+	        vintage: vintage
+	      };
+	      cache[tileID].metadata = metadata;
+	      if (callback) callback(null, metadata);
+	    })["catch"](function (err) {
+	      delete inflight[tileID];
+	      if (callback) callback(err.message);
+	    });
+	  };
 
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	  bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+	  return bing;
+	};
 
-	        context.surface()
-	            .on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function() {
-	                selection.call(redraw);
-	            });
-	    };
+	rendererBackgroundSource.Esri = function (data) {
+	  // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
+	  if (data.template.match(/blankTile/) === null) {
+	    data.template = data.template + '?blankTile=false';
+	  }
 
-	    panel.off = function() {
-	        context.surface()
-	            .on('.info-location', null);
-	    };
+	  var esri = rendererBackgroundSource(data);
+	  var cache = {};
+	  var inflight = {};
 
-	    panel.id = 'location';
-	    panel.title = _t('info_panels.location.title');
-	    panel.key = _t('info_panels.location.key');
+	  var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
+	  // https://developers.arcgis.com/documentation/tiled-elevation-service/
 
 
-	    return panel;
-	}
+	  esri.fetchTilemap = function (center) {
+	    // skip if we have already fetched a tilemap within 5km
+	    if (_prevCenter && geoSphericalDistance(center, _prevCenter) < 5000) return;
+	    _prevCenter = center; // tiles are available globally to zoom level 19, afterward they may or may not be present
 
-	function uiPanelMeasurement(context) {
-	    var locale = _mainLocalizer.localeCode();
-	    var isImperial = !_mainLocalizer.usesMetric();
+	    var z = 20; // first generate a random url using the template
 
+	    var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map
 
-	    function radiansToMeters(r) {
-	        // using WGS84 authalic radius (6371007.1809 m)
-	        return r * 6371007.1809;
-	    }
+	    var x = Math.floor((center[0] + 180) / 360 * Math.pow(2, z));
+	    var y = Math.floor((1 - Math.log(Math.tan(center[1] * Math.PI / 180) + 1 / Math.cos(center[1] * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, z)); // fetch an 8x8 grid to leverage cache
 
-	    function steradiansToSqmeters(r) {
-	        // http://gis.stackexchange.com/a/124857/40446
-	        return r / (4 * Math.PI) * 510065621724000;
-	    }
+	    var tilemapUrl = dummyUrl.replace(/tile\/[0-9]+\/[0-9]+\/[0-9]+\?blankTile=false/, 'tilemap') + '/' + z + '/' + y + '/' + x + '/8/8'; // make the request and introspect the response from the tilemap server
 
+	    d3_json(tilemapUrl).then(function (tilemap) {
+	      if (!tilemap) {
+	        throw new Error('Unknown Error');
+	      }
 
-	    function toLineString(feature) {
-	        if (feature.type === 'LineString') { return feature; }
+	      var hasTiles = true;
 
-	        var result = { type: 'LineString', coordinates: [] };
-	        if (feature.type === 'Polygon') {
-	            result.coordinates = feature.coordinates[0];
-	        } else if (feature.type === 'MultiPolygon') {
-	            result.coordinates = feature.coordinates[0][0];
+	      for (var i = 0; i < tilemap.data.length; i++) {
+	        // 0 means an individual tile in the grid doesn't exist
+	        if (!tilemap.data[i]) {
+	          hasTiles = false;
+	          break;
 	        }
+	      } // if any tiles are missing at level 20 we restrict maxZoom to 19
 
-	        return result;
-	    }
 
+	      esri.zoomExtent[1] = hasTiles ? 22 : 19;
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  };
 
-	    function redraw(selection) {
-	        var graph = context.graph();
-	        var selectedNoteID = context.selectedNoteID();
-	        var osm = services.osm;
+	  esri.getMetadata = function (center, tileCoord, callback) {
+	    var tileID = tileCoord.slice(0, 3).join('/');
+	    var zoom = Math.min(tileCoord[2], esri.zoomExtent[1]);
+	    var centerPoint = center[0] + ',' + center[1]; // long, lat (as it should be)
 
-	        var heading;
-	        var center, location, centroid;
-	        var closed, geometry;
-	        var totalNodeCount, length = 0, area = 0;
+	    var unknown = _t('info_panels.background.unknown');
+	    var metadataLayer;
+	    var vintage = {};
+	    var metadata = {};
+	    if (inflight[tileID]) return;
 
-	        if (selectedNoteID && osm) {       // selected 1 note
+	    switch (true) {
+	      case zoom >= 20 && esri.id === 'EsriWorldImageryClarity':
+	        metadataLayer = 4;
+	        break;
 
-	            var note = osm.getNote(selectedNoteID);
-	            heading = _t('note.note') + ' ' + selectedNoteID;
-	            location = note.loc;
-	            geometry = 'note';
+	      case zoom >= 19:
+	        metadataLayer = 3;
+	        break;
 
-	        } else {                           // selected 1..n entities
-	            var selectedIDs = context.selectedIDs().filter(function(id) {
-	                return context.hasEntity(id);
-	            });
-	            var selected = selectedIDs.map(function(id) {
-	                return context.entity(id);
-	            });
+	      case zoom >= 17:
+	        metadataLayer = 2;
+	        break;
 
-	            heading = selected.length === 1 ? selected[0].id :
-	                _t('info_panels.measurement.selected', { n: selected.length.toLocaleString(locale) });
-
-	            if (selected.length) {
-	                var extent = geoExtent();
-	                for (var i in selected) {
-	                    var entity = selected[i];
-	                    extent._extend(entity.extent(graph));
-
-	                    geometry = entity.geometry(graph);
-	                    if (geometry === 'line' || geometry === 'area') {
-	                        closed = (entity.type === 'relation') || (entity.isClosed() && !entity.isDegenerate());
-	                        var feature = entity.asGeoJSON(graph);
-	                        length += radiansToMeters(d3_geoLength(toLineString(feature)));
-	                        centroid = d3_geoCentroid(feature);
-	                        if (closed) {
-	                            area += steradiansToSqmeters(entity.area(graph));
-	                        }
-	                    }
-	                }
+	      case zoom >= 13:
+	        metadataLayer = 0;
+	        break;
 
-	                if (selected.length > 1) {
-	                    geometry = null;
-	                    closed = null;
-	                    centroid = null;
-	                }
+	      default:
+	        metadataLayer = 99;
+	    }
 
-	                if (selected.length === 1 && selected[0].type === 'node') {
-	                    location = selected[0].loc;
-	                } else {
-	                    totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
-	                }
+	    var url; // build up query using the layer appropriate to the current zoom
 
-	                if (!location && !centroid) {
-	                    center = extent.center();
-	                }
-	            }
-	        }
+	    if (esri.id === 'EsriWorldImagery') {
+	      url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/';
+	    } else if (esri.id === 'EsriWorldImageryClarity') {
+	      url = 'https://serviceslab.arcgisonline.com/arcgis/rest/services/Clarity_World_Imagery/MapServer/';
+	    }
 
-	        selection.html('');
+	    url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
 
-	        if (heading) {
-	            selection
-	                .append('h4')
-	                .attr('class', 'measurement-heading')
-	                .text(heading);
-	        }
+	    if (!cache[tileID]) {
+	      cache[tileID] = {};
+	    }
 
-	        var list = selection
-	            .append('ul');
-	        var coordItem;
+	    if (cache[tileID] && cache[tileID].metadata) {
+	      return callback(null, cache[tileID].metadata);
+	    } // accurate metadata is only available >= 13
 
-	        if (geometry) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.measurement.geometry') + ':')
-	                .append('span')
-	                .text(
-	                    closed ? _t('info_panels.measurement.closed_' + geometry) : _t('geometry.' + geometry)
-	                );
+
+	    if (metadataLayer === 99) {
+	      vintage = {
+	        start: null,
+	        end: null,
+	        range: null
+	      };
+	      metadata = {
+	        vintage: null,
+	        source: unknown,
+	        description: unknown,
+	        resolution: unknown,
+	        accuracy: unknown
+	      };
+	      callback(null, metadata);
+	    } else {
+	      inflight[tileID] = true;
+	      d3_json(url).then(function (result) {
+	        delete inflight[tileID];
+
+	        if (!result) {
+	          throw new Error('Unknown Error');
+	        } else if (result.features && result.features.length < 1) {
+	          throw new Error('No Results');
+	        } else if (result.error && result.error.message) {
+	          throw new Error(result.error.message);
+	        } // pass through the discrete capture date from metadata
+
+
+	        var captureDate = localeDateString(result.features[0].attributes.SRC_DATE2);
+	        vintage = {
+	          start: captureDate,
+	          end: captureDate,
+	          range: captureDate
+	        };
+	        metadata = {
+	          vintage: vintage,
+	          source: clean(result.features[0].attributes.NICE_NAME),
+	          description: clean(result.features[0].attributes.NICE_DESC),
+	          resolution: clean(+parseFloat(result.features[0].attributes.SRC_RES).toFixed(4)),
+	          accuracy: clean(+parseFloat(result.features[0].attributes.SRC_ACC).toFixed(4))
+	        }; // append units - meters
+
+	        if (isFinite(metadata.resolution)) {
+	          metadata.resolution += ' m';
 	        }
 
-	        if (totalNodeCount) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.measurement.node_count') + ':')
-	                .append('span')
-	                .text(totalNodeCount.toLocaleString(locale));
-	        }
-
-	        if (area) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.measurement.area') + ':')
-	                .append('span')
-	                .text(displayArea(area, isImperial));
-	        }
-
-	        if (length) {
-	            var lengthLabel = _t('info_panels.measurement.' + (closed ? 'perimeter' : 'length'));
-	            list
-	                .append('li')
-	                .text(lengthLabel + ':')
-	                .append('span')
-	                .text(displayLength(length, isImperial));
-	        }
-
-	        if (location) {
-	            coordItem = list
-	                .append('li')
-	                .text(_t('info_panels.measurement.location') + ':');
-	            coordItem.append('span')
-	                .text(dmsCoordinatePair(location));
-	            coordItem.append('span')
-	                .text(decimalCoordinatePair(location));
-	        }
-
-	        if (centroid) {
-	            coordItem = list
-	                .append('li')
-	                .text(_t('info_panels.measurement.centroid') + ':');
-	            coordItem.append('span')
-	                .text(dmsCoordinatePair(centroid));
-	            coordItem.append('span')
-	                .text(decimalCoordinatePair(centroid));
-	        }
-
-	        if (center) {
-	            coordItem = list
-	                .append('li')
-	                .text(_t('info_panels.measurement.center') + ':');
-	            coordItem.append('span')
-	                .text(dmsCoordinatePair(center));
-	            coordItem.append('span')
-	                .text(decimalCoordinatePair(center));
-	        }
-
-	        if (length || area) {
-	            var toggle  = isImperial ? 'imperial' : 'metric';
-	            selection
-	                .append('a')
-	                .text(_t('info_panels.measurement.' + toggle))
-	                .attr('href', '#')
-	                .attr('class', 'button button-toggle-units')
-	                .on('click', function() {
-	                    event.preventDefault();
-	                    isImperial = !isImperial;
-	                    selection.call(redraw);
-	                });
+	        if (isFinite(metadata.accuracy)) {
+	          metadata.accuracy += ' m';
 	        }
-	    }
 
+	        cache[tileID].metadata = metadata;
+	        if (callback) callback(null, metadata);
+	      })["catch"](function (err) {
+	        delete inflight[tileID];
+	        if (callback) callback(err.message);
+	      });
+	    }
 
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	    function clean(val) {
+	      return String(val).trim() || unknown;
+	    }
+	  };
 
-	        context.map()
-	            .on('drawn.info-measurement', function() {
-	                selection.call(redraw);
-	            });
+	  return esri;
+	};
 
-	        context
-	            .on('enter.info-measurement', function() {
-	                selection.call(redraw);
-	            });
-	    };
+	rendererBackgroundSource.None = function () {
+	  var source = rendererBackgroundSource({
+	    id: 'none',
+	    template: ''
+	  });
 
-	    panel.off = function() {
-	        context.map().on('drawn.info-measurement', null);
-	        context.on('enter.info-measurement', null);
-	    };
+	  source.name = function () {
+	    return _t('background.none');
+	  };
 
-	    panel.id = 'measurement';
-	    panel.title = _t('info_panels.measurement.title');
-	    panel.key = _t('info_panels.measurement.key');
+	  source.label = function () {
+	    return _t.html('background.none');
+	  };
 
+	  source.imageryUsed = function () {
+	    return null;
+	  };
 
-	    return panel;
-	}
+	  source.area = function () {
+	    return -1; // sources in background pane are sorted by area
+	  };
 
-	var uiInfoPanels = {
-	    background: uiPanelBackground,
-	    history: uiPanelHistory,
-	    location: uiPanelLocation,
-	    measurement: uiPanelMeasurement,
+	  return source;
 	};
 
-	function uiInfo(context) {
-	    var ids = Object.keys(uiInfoPanels);
-	    var wasActive = ['measurement'];
-	    var panels = {};
-	    var active = {};
-
-	    // create panels
-	    ids.forEach(function(k) {
-	        if (!panels[k]) {
-	            panels[k] = uiInfoPanels[k](context);
-	            active[k] = false;
-	        }
-	    });
-
-
-	    function info(selection) {
-
-	        function redraw() {
-	            var activeids = ids.filter(function(k) { return active[k]; }).sort();
-
-	            var containers = infoPanels.selectAll('.panel-container')
-	                .data(activeids, function(k) { return k; });
+	rendererBackgroundSource.Custom = function (template) {
+	  var source = rendererBackgroundSource({
+	    id: 'custom',
+	    template: template
+	  });
 
-	            containers.exit()
-	                .style('opacity', 1)
-	                .transition()
-	                .duration(200)
-	                .style('opacity', 0)
-	                .on('end', function(d) {
-	                    select(this)
-	                        .call(panels[d].off)
-	                        .remove();
-	                });
+	  source.name = function () {
+	    return _t('background.custom');
+	  };
 
-	            var enter = containers.enter()
-	                .append('div')
-	                .attr('class', function(d) { return 'fillD2 panel-container panel-container-' + d; });
+	  source.label = function () {
+	    return _t.html('background.custom');
+	  };
 
-	            enter
-	                .style('opacity', 0)
-	                .transition()
-	                .duration(200)
-	                .style('opacity', 1);
+	  source.imageryUsed = function () {
+	    // sanitize personal connection tokens - #6801
+	    var cleaned = source.template(); // from query string parameters
 
-	            var title = enter
-	                .append('div')
-	                .attr('class', 'panel-title fillD2');
+	    if (cleaned.indexOf('?') !== -1) {
+	      var parts = cleaned.split('?', 2);
+	      var qs = utilStringQs(parts[1]);
+	      ['access_token', 'connectId', 'token'].forEach(function (param) {
+	        if (qs[param]) {
+	          qs[param] = '{apikey}';
+	        }
+	      });
+	      cleaned = parts[0] + '?' + utilQsString(qs, true); // true = soft encode
+	    } // from wms/wmts api path parameters
 
-	            title
-	                .append('h3')
-	                .text(function(d) { return panels[d].title; });
 
-	            title
-	                .append('button')
-	                .attr('class', 'close')
-	                .on('click', function (d) { info.toggle(d); })
-	                .call(svgIcon('#iD-icon-close'));
+	    cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+	    return 'Custom (' + cleaned + ' )';
+	  };
 
-	            enter
-	                .append('div')
-	                .attr('class', function(d) { return 'panel-content panel-content-' + d; });
+	  source.area = function () {
+	    return -2; // sources in background pane are sorted by area
+	  };
 
+	  return source;
+	};
 
-	            // redraw the panels
-	            infoPanels.selectAll('.panel-content')
-	                .each(function(d) {
-	                    select(this).call(panels[d]);
-	                });
-	        }
+	function rendererTileLayer(context) {
+	  var transformProp = utilPrefixCSSProperty('Transform');
+	  var tiler = utilTiler();
+	  var _tileSize = 256;
 
+	  var _projection;
 
-	        info.toggle = function(which) {
-	            if (event) {
-	                event.stopImmediatePropagation();
-	                event.preventDefault();
-	            }
+	  var _cache = {};
 
-	            var activeids = ids.filter(function(k) { return active[k]; });
+	  var _tileOrigin;
 
-	            if (which) {  // toggle one
-	                active[which] = !active[which];
-	                if (activeids.length === 1 && activeids[0] === which) {  // none active anymore
-	                    wasActive = [which];
-	                }
+	  var _zoom;
 
-	                context.container().select('.' + which + '-panel-toggle-item')
-	                    .classed('active', active[which])
-	                    .select('input')
-	                    .property('checked', active[which]);
-
-	            } else {      // toggle all
-	                if (activeids.length) {
-	                    wasActive = activeids;
-	                    activeids.forEach(function(k) { active[k] = false; });
-	                } else {
-	                    wasActive.forEach(function(k) { active[k] = true; });
-	                }
-	            }
+	  var _source;
 
-	            redraw();
-	        };
+	  function tileSizeAtZoom(d, z) {
+	    var EPSILON = 0.002; // close seams
 
+	    return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
+	  }
 
-	        var infoPanels = selection.selectAll('.info-panels')
-	            .data([0]);
+	  function atZoom(t, distance) {
+	    var power = Math.pow(2, distance);
+	    return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
+	  }
 
-	        infoPanels = infoPanels.enter()
-	            .append('div')
-	            .attr('class', 'info-panels')
-	            .merge(infoPanels);
+	  function lookUp(d) {
+	    for (var up = -1; up > -d[2]; up--) {
+	      var tile = atZoom(d, up);
 
-	        redraw();
+	      if (_cache[_source.url(tile)] !== false) {
+	        return tile;
+	      }
+	    }
+	  }
 
-	        context.keybinding()
-	            .on(uiCmd('⌘' + _t('info_panels.key')), info.toggle);
+	  function uniqueBy(a, n) {
+	    var o = [];
+	    var seen = {};
 
-	        ids.forEach(function(k) {
-	            var key = _t('info_panels.' + k + '.key', { default: null });
-	            if (!key) { return; }
-	            context.keybinding()
-	                .on(uiCmd('⌘⇧' + key), function() { info.toggle(k); });
-	        });
+	    for (var i = 0; i < a.length; i++) {
+	      if (seen[a[i][n]] === undefined) {
+	        o.push(a[i]);
+	        seen[a[i][n]] = true;
+	      }
 	    }
 
-	    return info;
-	}
+	    return o;
+	  }
 
-	function pointBox(loc, context) {
-	    var rect = context.surfaceRect();
-	    var point = context.curtainProjection(loc);
-	    return {
-	        left: point[0] + rect.left - 40,
-	        top: point[1] + rect.top - 60,
-	        width: 80,
-	        height: 90
-	    };
-	}
+	  function addSource(d) {
+	    d.push(_source.url(d));
+	    return d;
+	  } // Update tiles based on current state of `projection`.
 
 
-	function pad(locOrBox, padding, context) {
-	    var box;
-	    if (locOrBox instanceof Array) {
-	        var rect = context.surfaceRect();
-	        var point = context.curtainProjection(locOrBox);
-	        box = {
-	            left: point[0] + rect.left,
-	            top: point[1] + rect.top
-	        };
+	  function background(selection) {
+	    _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+	    var pixelOffset;
+
+	    if (_source) {
+	      pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
 	    } else {
-	        box = locOrBox;
+	      pixelOffset = [0, 0];
 	    }
 
-	    return {
-	        left: box.left - padding,
-	        top: box.top - padding,
-	        width: (box.width || 0) + 2 * padding,
-	        height: (box.width || 0) + 2 * padding
-	    };
-	}
+	    var translate = [_projection.translate()[0] + pixelOffset[0], _projection.translate()[1] + pixelOffset[1]];
+	    tiler.scale(_projection.scale() * 2 * Math.PI).translate(translate);
+	    _tileOrigin = [_projection.scale() * Math.PI - translate[0], _projection.scale() * Math.PI - translate[1]];
+	    render(selection);
+	  } // Derive the tiles onscreen, remove those offscreen and position them.
+	  // Important that this part not depend on `_projection` because it's
+	  // rentered when tiles load/error (see #644).
 
 
-	function icon(name, svgklass, useklass) {
-	    return '<svg class="icon ' + (svgklass || '') + '">' +
-	         '<use xlink:href="' + name + '"' +
-	         (useklass ? ' class="' + useklass + '"' : '') + '></use></svg>';
-	}
+	  function render(selection) {
+	    if (!_source) return;
+	    var requests = [];
+	    var showDebug = context.getDebug('tile') && !_source.overlay;
 
-	var helpStringReplacements;
+	    if (_source.validZoom(_zoom)) {
+	      tiler.skipNullIsland(!!_source.overlay);
+	      tiler().forEach(function (d) {
+	        addSource(d);
+	        if (d[3] === '') return;
+	        if (typeof d[3] !== 'string') return; // Workaround for #2295
 
-	// Returns the localized string for `id` with a standardized set of icon, key, and
-	// label replacements suitable for tutorials and documentation. Optionally supplemented
-	// with custom `replacements`
-	function helpString(id, replacements) {
-	    // only load these the first time
-	    if (!helpStringReplacements) { helpStringReplacements = {
-	        // insert icons corresponding to various UI elements
-	        point_icon: icon('#iD-icon-point', 'pre-text'),
-	        line_icon: icon('#iD-icon-line', 'pre-text'),
-	        area_icon: icon('#iD-icon-area', 'pre-text'),
-	        note_icon: icon('#iD-icon-note', 'pre-text add-note'),
-	        plus: icon('#iD-icon-plus', 'pre-text'),
-	        minus: icon('#iD-icon-minus', 'pre-text'),
-	        move_icon: icon('#iD-operation-move', 'pre-text operation'),
-	        merge_icon: icon('#iD-operation-merge', 'pre-text operation'),
-	        delete_icon: icon('#iD-operation-delete', 'pre-text operation'),
-	        circularize_icon: icon('#iD-operation-circularize', 'pre-text operation'),
-	        split_icon: icon('#iD-operation-split', 'pre-text operation'),
-	        orthogonalize_icon: icon('#iD-operation-orthogonalize', 'pre-text operation'),
-	        disconnect_icon: icon('#iD-operation-disconnect', 'pre-text operation'),
-	        layers_icon: icon('#iD-icon-layers', 'pre-text'),
-	        data_icon: icon('#iD-icon-data', 'pre-text'),
-	        inspect: icon('#iD-icon-inspect', 'pre-text'),
-	        help_icon: icon('#iD-icon-help', 'pre-text'),
-	        undo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo', 'pre-text'),
-	        redo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-undo' : '#iD-icon-redo', 'pre-text'),
-	        save_icon: icon('#iD-icon-save', 'pre-text'),
-	        leftclick: icon('#iD-walkthrough-mouse-left', 'pre-text operation'),
-	        rightclick: icon('#iD-walkthrough-mouse-right', 'pre-text operation'),
-	        mousewheel_icon: icon('#iD-walkthrough-mousewheel', 'pre-text operation'),
-	        tap_icon: icon('#iD-walkthrough-tap', 'pre-text operation'),
-	        doubletap_icon: icon('#iD-walkthrough-doubletap', 'pre-text operation'),
-	        longpress_icon: icon('#iD-walkthrough-longpress', 'pre-text operation'),
-	        touchdrag_icon: icon('#iD-walkthrough-touchdrag', 'pre-text operation'),
-	        pinch_icon: icon('#iD-walkthrough-pinch-apart', 'pre-text operation'),
-
-	        // insert keys; may be localized and platform-dependent
-	        shift: uiCmd.display('⇧'),
-	        alt: uiCmd.display('⌥'),
-	        return: uiCmd.display('↵'),
-	        esc: _t('shortcuts.key.esc'),
-	        space: _t('shortcuts.key.space'),
-	        add_note_key: _t('modes.add_note.key'),
-	        help_key: _t('help.key'),
-	        shortcuts_key: _t('shortcuts.toggle.key'),
-
-	        // reference localized UI labels directly so that they'll always match
-	        save: _t('save.title'),
-	        undo: _t('undo.title'),
-	        redo: _t('redo.title'),
-	        upload: _t('commit.save'),
-	        point: _t('modes.add_point.title'),
-	        line: _t('modes.add_line.title'),
-	        area: _t('modes.add_area.title'),
-	        note: _t('modes.add_note.title'),
-	        delete: _t('operations.delete.title'),
-	        move: _t('operations.move.title'),
-	        orthogonalize: _t('operations.orthogonalize.title'),
-	        circularize: _t('operations.circularize.title'),
-	        merge: _t('operations.merge.title'),
-	        disconnect: _t('operations.disconnect.title'),
-	        split: _t('operations.split.title'),
-	        map_data: _t('map_data.title'),
-	        osm_notes: _t('map_data.layers.notes.title'),
-	        fields: _t('inspector.fields'),
-	        tags: _t('inspector.tags'),
-	        relations: _t('inspector.relations'),
-	        new_relation: _t('inspector.new_relation'),
-	        turn_restrictions: _t('presets.fields.restrictions.label'),
-	        background_settings: _t('background.description'),
-	        imagery_offset: _t('background.fix_misalignment'),
-	        start_the_walkthrough: _t('splash.walkthrough'),
-	        help: _t('help.title'),
-	        ok: _t('intro.ok')
-	    }; }
-
-	    var reps;
-	    if (replacements) {
-	        reps = Object.assign(replacements, helpStringReplacements);
-	    } else {
-	        reps = helpStringReplacements;
-	    }
+	        requests.push(d);
 
-	    return _t(id, reps)
-	         // use keyboard key styling for shortcuts
-	        .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
-	}
+	        if (_cache[d[3]] === false && lookUp(d)) {
+	          requests.push(addSource(lookUp(d)));
+	        }
+	      });
+	      requests = uniqueBy(requests, 3).filter(function (r) {
+	        // don't re-request tiles which have failed in the past
+	        return _cache[r[3]] !== false;
+	      });
+	    }
 
+	    function load(d3_event, d) {
+	      _cache[d[3]] = true;
+	      select(this).on('error', null).on('load', null).classed('tile-loaded', true);
+	      render(selection);
+	    }
 
-	function slugify(text) {
-	    return text.toString().toLowerCase()
-	        .replace(/\s+/g, '-')           // Replace spaces with -
-	        .replace(/[^\w\-]+/g, '')       // Remove all non-word chars
-	        .replace(/\-\-+/g, '-')         // Replace multiple - with single -
-	        .replace(/^-+/, '')             // Trim - from start of text
-	        .replace(/-+$/, '');            // Trim - from end of text
-	}
+	    function error(d3_event, d) {
+	      _cache[d[3]] = false;
+	      select(this).on('error', null).on('load', null).remove();
+	      render(selection);
+	    }
 
+	    function imageTransform(d) {
+	      var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
-	// console warning for missing walkthrough names
-	var missingStrings = {};
-	function checkKey(key, text) {
-	    if (_t(key, { default: undefined}) === undefined) {
-	        if (missingStrings.hasOwnProperty(key)) { return; }  // warn once
-	        missingStrings[key] = text;
-	        var missing = key + ': ' + text;
-	        if (typeof console !== 'undefined') { console.log(missing); } // eslint-disable-line
+	      var scale = tileSizeAtZoom(d, _zoom);
+	      return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
 	    }
-	}
-
 
-	function localize(obj) {
-	    var key;
+	    function tileCenter(d) {
+	      var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
-	    // Assign name if entity has one..
-	    var name = obj.tags && obj.tags.name;
-	    if (name) {
-	        key = 'intro.graph.name.' + slugify(name);
-	        obj.tags.name = _t(key, { default: name });
-	        checkKey(key, name);
-	    }
-
-	    // Assign street name if entity has one..
-	    var street = obj.tags && obj.tags['addr:street'];
-	    if (street) {
-	        key = 'intro.graph.name.' + slugify(street);
-	        obj.tags['addr:street'] = _t(key, { default: street });
-	        checkKey(key, street);
-
-	        // Add address details common across walkthrough..
-	        var addrTags = [
-	            'block_number', 'city', 'county', 'district', 'hamlet', 'neighbourhood',
-	            'postcode', 'province', 'quarter', 'state', 'subdistrict', 'suburb'
-	        ];
-	        addrTags.forEach(function(k) {
-	            var key = 'intro.graph.' + k;
-	            var tag = 'addr:' + k;
-	            var val = obj.tags && obj.tags[tag];
-	            var str = _t(key, { default: val });
-
-	            if (str) {
-	                if (str.match(/^<.*>$/) !== null) {
-	                    delete obj.tags[tag];
-	                } else {
-	                    obj.tags[tag] = str;
-	                }
-	            }
-	        });
+	      return [d[0] * ts - _tileOrigin[0] + ts / 2, d[1] * ts - _tileOrigin[1] + ts / 2];
 	    }
 
-	    return obj;
-	}
+	    function debugTransform(d) {
+	      var coord = tileCenter(d);
+	      return 'translate(' + coord[0] + 'px,' + coord[1] + 'px)';
+	    } // Pick a representative tile near the center of the viewport
+	    // (This is useful for sampling the imagery vintage)
 
 
-	// Used to detect squareness.. some duplicataion of code from actionOrthogonalize.
-	function isMostlySquare(points) {
-	    // note: uses 15 here instead of the 12 from actionOrthogonalize because
-	    // actionOrthogonalize can actually straighten some larger angles as it iterates
-	    var threshold = 15; // degrees within right or straight
-	    var lowerBound = Math.cos((90 - threshold) * Math.PI / 180);  // near right
-	    var upperBound = Math.cos(threshold * Math.PI / 180);         // near straight
-
-	    for (var i = 0; i < points.length; i++) {
-	        var a = points[(i - 1 + points.length) % points.length];
-	        var origin = points[i];
-	        var b = points[(i + 1) % points.length];
+	    var dims = tiler.size();
+	    var mapCenter = [dims[0] / 2, dims[1] / 2];
+	    var minDist = Math.max(dims[0], dims[1]);
+	    var nearCenter;
+	    requests.forEach(function (d) {
+	      var c = tileCenter(d);
+	      var dist = geoVecLength(c, mapCenter);
 
-	        var dotp = geoVecNormalizedDot(a, b, origin);
-	        var mag = Math.abs(dotp);
-	        if (mag > lowerBound && mag < upperBound) {
-	            return false;
+	      if (dist < minDist) {
+	        minDist = dist;
+	        nearCenter = d;
+	      }
+	    });
+	    var image = selection.selectAll('img').data(requests, function (d) {
+	      return d[3];
+	    });
+	    image.exit().style(transformProp, imageTransform).classed('tile-removing', true).classed('tile-center', false).each(function () {
+	      var tile = select(this);
+	      window.setTimeout(function () {
+	        if (tile.classed('tile-removing')) {
+	          tile.remove();
 	        }
-	    }
+	      }, 300);
+	    });
+	    image.enter().append('img').attr('class', 'tile').attr('draggable', 'false').style('width', _tileSize + 'px').style('height', _tileSize + 'px').attr('src', function (d) {
+	      return d[3];
+	    }).on('error', error).on('load', load).merge(image).style(transformProp, imageTransform).classed('tile-debug', showDebug).classed('tile-removing', false).classed('tile-center', function (d) {
+	      return d === nearCenter;
+	    });
+	    var debug = selection.selectAll('.tile-label-debug').data(showDebug ? requests : [], function (d) {
+	      return d[3];
+	    });
+	    debug.exit().remove();
+
+	    if (showDebug) {
+	      var debugEnter = debug.enter().append('div').attr('class', 'tile-label-debug');
+	      debugEnter.append('div').attr('class', 'tile-label-debug-coord');
+	      debugEnter.append('div').attr('class', 'tile-label-debug-vintage');
+	      debug = debug.merge(debugEnter);
+	      debug.style(transformProp, debugTransform);
+	      debug.selectAll('.tile-label-debug-coord').html(function (d) {
+	        return d[2] + ' / ' + d[0] + ' / ' + d[1];
+	      });
+	      debug.selectAll('.tile-label-debug-vintage').each(function (d) {
+	        var span = select(this);
+	        var center = context.projection.invert(tileCenter(d));
 
-	    return true;
-	}
+	        _source.getMetadata(center, d, function (err, result) {
+	          span.html(result && result.vintage && result.vintage.range || _t('info_panels.background.vintage') + ': ' + _t('info_panels.background.unknown'));
+	        });
+	      });
+	    }
+	  }
 
+	  background.projection = function (val) {
+	    if (!arguments.length) return _projection;
+	    _projection = val;
+	    return background;
+	  };
 
-	function selectMenuItem(context, operation) {
-	    return context.container().select('.edit-menu .edit-menu-item-' + operation);
-	}
+	  background.dimensions = function (val) {
+	    if (!arguments.length) return tiler.size();
+	    tiler.size(val);
+	    return background;
+	  };
 
+	  background.source = function (val) {
+	    if (!arguments.length) return _source;
+	    _source = val;
+	    _tileSize = _source.tileSize;
+	    _cache = {};
+	    tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
+	    return background;
+	  };
 
-	function transitionTime(point1, point2) {
-	    var distance = geoSphericalDistance(point1, point2);
-	    if (distance === 0)
-	        { return 0; }
-	    else if (distance < 80)
-	        { return 500; }
-	    else
-	        { return 1000; }
+	  return background;
 	}
 
-	// Tooltips and svg mask used to highlight certain features
-	function uiCurtain(containerNode) {
+	var _imageryIndex = null;
+	function rendererBackground(context) {
+	  var dispatch$1 = dispatch('change');
+	  var detected = utilDetect();
+	  var baseLayer = rendererTileLayer(context).projection(context.projection);
+	  var _isValid = true;
+	  var _overlayLayers = [];
+	  var _brightness = 1;
+	  var _contrast = 1;
+	  var _saturation = 1;
+	  var _sharpness = 1;
+
+	  function ensureImageryIndex() {
+	    return _mainFileFetcher.get('imagery').then(function (sources) {
+	      if (_imageryIndex) return _imageryIndex;
+	      _imageryIndex = {
+	        imagery: sources,
+	        features: {}
+	      }; // use which-polygon to support efficient index and querying for imagery
+
+	      var features = sources.map(function (source) {
+	        if (!source.polygon) return null; // workaround for editor-layer-index weirdness..
+	        // Add an extra array nest to each element in `source.polygon`
+	        // so the rings are not treated as a bunch of holes:
+	        // what we have: [ [[outer],[hole],[hole]] ]
+	        // what we want: [ [[outer]],[[outer]],[[outer]] ]
+
+	        var rings = source.polygon.map(function (ring) {
+	          return [ring];
+	        });
+	        var feature = {
+	          type: 'Feature',
+	          properties: {
+	            id: source.id
+	          },
+	          geometry: {
+	            type: 'MultiPolygon',
+	            coordinates: rings
+	          }
+	        };
+	        _imageryIndex.features[source.id] = feature;
+	        return feature;
+	      }).filter(Boolean);
+	      _imageryIndex.query = whichPolygon_1({
+	        type: 'FeatureCollection',
+	        features: features
+	      }); // Instantiate `rendererBackgroundSource` objects for each source
+
+	      _imageryIndex.backgrounds = sources.map(function (source) {
+	        if (source.type === 'bing') {
+	          return rendererBackgroundSource.Bing(source, dispatch$1);
+	        } else if (/^EsriWorldImagery/.test(source.id)) {
+	          return rendererBackgroundSource.Esri(source);
+	        } else {
+	          return rendererBackgroundSource(source);
+	        }
+	      }); // Add 'None'
 
-	    var surface = select(null),
-	        tooltip = select(null),
-	        darkness = select(null);
+	      _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'
 
-	    function curtain(selection) {
-	        surface = selection
-	            .append('svg')
-	            .attr('class', 'curtain')
-	            .style('top', 0)
-	            .style('left', 0);
 
-	        darkness = surface.append('path')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('class', 'curtain-darkness');
+	      var template = corePreferences('background-custom-template') || '';
+	      var custom = rendererBackgroundSource.Custom(template);
 
-	        select(window).on('resize.curtain', resize);
+	      _imageryIndex.backgrounds.unshift(custom);
 
-	        tooltip = selection.append('div')
-	            .attr('class', 'tooltip');
+	      return _imageryIndex;
+	    });
+	  }
 
-	        tooltip
-	            .append('div')
-	            .attr('class', 'popover-arrow');
+	  function background(selection) {
+	    var currSource = baseLayer.source(); // If we are displaying an Esri basemap at high zoom,
+	    // check its tilemap to see how high the zoom can go
 
-	        tooltip
-	            .append('div')
-	            .attr('class', 'popover-inner');
+	    if (context.map().zoom() > 18) {
+	      if (currSource && /^EsriWorldImagery/.test(currSource.id)) {
+	        var center = context.map().center();
+	        currSource.fetchTilemap(center);
+	      }
+	    } // Is the imagery valid here? - #4827
 
-	        resize();
 
+	    var sources = background.sources(context.map().extent());
+	    var wasValid = _isValid;
+	    _isValid = !!sources.filter(function (d) {
+	      return d === currSource;
+	    }).length;
 
-	        function resize() {
-	            surface
-	                .attr('width', containerNode.clientWidth)
-	                .attr('height', containerNode.clientHeight);
-	            curtain.cut(darkness.datum());
-	        }
+	    if (wasValid !== _isValid) {
+	      // change in valid status
+	      background.updateImagery();
 	    }
 
+	    var baseFilter = '';
 
-	    /**
-	     * Reveal cuts the curtain to highlight the given box,
-	     * and shows a tooltip with instructions next to the box.
-	     *
-	     * @param  {String|ClientRect} [box]   box used to cut the curtain
-	     * @param  {String}    [text]          text for a tooltip
-	     * @param  {Object}    [options]
-	     * @param  {string}    [options.tooltipClass]    optional class to add to the tooltip
-	     * @param  {integer}   [options.duration]        transition time in milliseconds
-	     * @param  {string}    [options.buttonText]      if set, create a button with this text label
-	     * @param  {function}  [options.buttonCallback]  if set, the callback for the button
-	     * @param  {function}  [options.padding]         extra margin in px to put around bbox
-	     * @param  {String|ClientRect} [options.tooltipBox]  box for tooltip position, if different from box for the curtain
-	     */
-	    curtain.reveal = function(box, text, options) {
-	        options = options || {};
-
-	        if (typeof box === 'string') {
-	            box = select(box).node();
-	        }
-	        if (box && box.getBoundingClientRect) {
-	            box = copyBox(box.getBoundingClientRect());
-	            var containerRect = containerNode.getBoundingClientRect();
-	            box.top -= containerRect.top;
-	            box.left -= containerRect.left;
-	        }
-	        if (box && options.padding) {
-	            box.top -= options.padding;
-	            box.left -= options.padding;
-	            box.bottom += options.padding;
-	            box.right += options.padding;
-	            box.height += options.padding * 2;
-	            box.width += options.padding * 2;
-	        }
-
-	        var tooltipBox;
-	        if (options.tooltipBox) {
-	            tooltipBox = options.tooltipBox;
-	            if (typeof tooltipBox === 'string') {
-	                tooltipBox = select(tooltipBox).node();
-	            }
-	            if (tooltipBox && tooltipBox.getBoundingClientRect) {
-	                tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
-	            }
-	        } else {
-	            tooltipBox = box;
-	        }
+	    if (detected.cssfilters) {
+	      if (_brightness !== 1) {
+	        baseFilter += " brightness(".concat(_brightness, ")");
+	      }
 
-	        if (tooltipBox && text) {
-	            // pseudo markdown bold text for the instruction section..
-	            var parts = text.split('**');
-	            var html = parts[0] ? '<span>' + parts[0] + '</span>' : '';
-	            if (parts[1]) {
-	                html += '<span class="instruction">' + parts[1] + '</span>';
-	            }
+	      if (_contrast !== 1) {
+	        baseFilter += " contrast(".concat(_contrast, ")");
+	      }
 
-	            html = html.replace(/\*(.*?)\*/g, '<em>$1</em>');   // emphasis
-	            html = html.replace(/\{br\}/g, '<br/><br/>');       // linebreak
+	      if (_saturation !== 1) {
+	        baseFilter += " saturate(".concat(_saturation, ")");
+	      }
 
-	            if (options.buttonText && options.buttonCallback) {
-	                html += '<div class="button-section">' +
-	                    '<button href="#" class="button action">' + options.buttonText + '</button></div>';
-	            }
+	      if (_sharpness < 1) {
+	        // gaussian blur
+	        var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
+	        baseFilter += " blur(".concat(blur, "px)");
+	      }
+	    }
 
-	            var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
-	            tooltip
-	                .classed(classes, true)
-	                .selectAll('.popover-inner')
-	                .html(html);
-
-	            if (options.buttonText && options.buttonCallback) {
-	                var button = tooltip.selectAll('.button-section .button.action');
-	                button
-	                    .on('click', function() {
-	                        event.preventDefault();
-	                        options.buttonCallback();
-	                    });
-	            }
+	    var base = selection.selectAll('.layer-background').data([0]);
+	    base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);
 
-	            var tip = copyBox(tooltip.node().getBoundingClientRect()),
-	                w = containerNode.clientWidth,
-	                h = containerNode.clientHeight,
-	                tooltipWidth = 200,
-	                tooltipArrow = 5,
-	                side, pos;
+	    if (detected.cssfilters) {
+	      base.style('filter', baseFilter || null);
+	    } else {
+	      base.style('opacity', _brightness);
+	    }
 
+	    var imagery = base.selectAll('.layer-imagery').data([0]);
+	    imagery.enter().append('div').attr('class', 'layer layer-imagery').merge(imagery).call(baseLayer);
+	    var maskFilter = '';
+	    var mixBlendMode = '';
 
-	            // hack: this will have bottom placement,
-	            // so need to reserve extra space for the tooltip illustration.
-	            if (options.tooltipClass === 'intro-mouse') {
-	                tip.height += 80;
-	            }
+	    if (detected.cssfilters && _sharpness > 1) {
+	      // apply unsharp mask
+	      mixBlendMode = 'overlay';
+	      maskFilter = 'saturate(0) blur(3px) invert(1)';
+	      var contrast = _sharpness - 1;
+	      maskFilter += " contrast(".concat(contrast, ")");
+	      var brightness = d3_interpolateNumber(1, 0.85)(_sharpness - 1);
+	      maskFilter += " brightness(".concat(brightness, ")");
+	    }
 
-	            // trim box dimensions to just the portion that fits in the container..
-	            if (tooltipBox.top + tooltipBox.height > h) {
-	                tooltipBox.height -= (tooltipBox.top + tooltipBox.height - h);
-	            }
-	            if (tooltipBox.left + tooltipBox.width > w) {
-	                tooltipBox.width -= (tooltipBox.left + tooltipBox.width - w);
-	            }
+	    var mask = base.selectAll('.layer-unsharp-mask').data(detected.cssfilters && _sharpness > 1 ? [0] : []);
+	    mask.exit().remove();
+	    mask.enter().append('div').attr('class', 'layer layer-mask layer-unsharp-mask').merge(mask).call(baseLayer).style('filter', maskFilter || null).style('mix-blend-mode', mixBlendMode || null);
+	    var overlays = selection.selectAll('.layer-overlay').data(_overlayLayers, function (d) {
+	      return d.source().name();
+	    });
+	    overlays.exit().remove();
+	    overlays.enter().insert('div', '.layer-data').attr('class', 'layer layer-overlay').merge(overlays).each(function (layer, i, nodes) {
+	      return select(nodes[i]).call(layer);
+	    });
+	  }
 
-	            // determine tooltip placement..
+	  background.updateImagery = function () {
+	    var currSource = baseLayer.source();
+	    if (context.inIntro() || !currSource) return;
 
-	            if (tooltipBox.top + tooltipBox.height < 100) {
-	                // tooltip below box..
-	                side = 'bottom';
-	                pos = [
-	                    tooltipBox.left + tooltipBox.width / 2 - tip.width / 2,
-	                    tooltipBox.top + tooltipBox.height
-	                ];
+	    var o = _overlayLayers.filter(function (d) {
+	      return !d.source().isLocatorOverlay() && !d.source().isHidden();
+	    }).map(function (d) {
+	      return d.source().id;
+	    }).join(',');
 
-	            } else if (tooltipBox.top > h - 140) {
-	                // tooltip above box..
-	                side = 'top';
-	                pos = [
-	                    tooltipBox.left + tooltipBox.width / 2 - tip.width / 2,
-	                    tooltipBox.top - tip.height
-	                ];
+	    var meters = geoOffsetToMeters(currSource.offset());
+	    var EPSILON = 0.01;
+	    var x = +meters[0].toFixed(2);
+	    var y = +meters[1].toFixed(2);
+	    var hash = utilStringQs(window.location.hash);
+	    var id = currSource.id;
 
-	            } else {
-	                // tooltip to the side of the tooltipBox..
-	                var tipY = tooltipBox.top + tooltipBox.height / 2 - tip.height / 2;
+	    if (id === 'custom') {
+	      id = "custom:".concat(currSource.template());
+	    }
 
-	                if (_mainLocalizer.textDirection() === 'rtl') {
-	                    if (tooltipBox.left - tooltipWidth - tooltipArrow < 70) {
-	                        side = 'right';
-	                        pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+	    if (id) {
+	      hash.background = id;
+	    } else {
+	      delete hash.background;
+	    }
 
-	                    } else {
-	                        side = 'left';
-	                        pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
-	                    }
+	    if (o) {
+	      hash.overlays = o;
+	    } else {
+	      delete hash.overlays;
+	    }
 
-	                } else {
-	                    if (tooltipBox.left + tooltipBox.width + tooltipArrow + tooltipWidth > w - 70) {
-	                        side = 'left';
-	                        pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
-	                    }
-	                    else {
-	                        side = 'right';
-	                        pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
-	                    }
-	                }
-	            }
+	    if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
+	      hash.offset = "".concat(x, ",").concat(y);
+	    } else {
+	      delete hash.offset;
+	    }
 
-	            if (options.duration !== 0 || !tooltip.classed(side)) {
-	                tooltip.call(uiToggle(true));
-	            }
+	    if (!window.mocha) {
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
 
-	            tooltip
-	                .style('top', pos[1] + 'px')
-	                .style('left', pos[0] + 'px')
-	                .attr('class', classes + ' ' + side);
+	    var imageryUsed = [];
+	    var photoOverlaysUsed = [];
+	    var currUsed = currSource.imageryUsed();
 
+	    if (currUsed && _isValid) {
+	      imageryUsed.push(currUsed);
+	    }
 
-	            // shift popover-inner if it is very close to the top or bottom edge
-	            // (doesn't affect the placement of the popover-arrow)
-	            var shiftY = 0;
-	            if (side === 'left' || side === 'right') {
-	                if (pos[1] < 60) {
-	                    shiftY = 60 - pos[1];
-	                }
-	                else if (pos[1] + tip.height > h - 100) {
-	                    shiftY = h - pos[1] - tip.height - 100;
-	                }
-	            }
-	            tooltip.selectAll('.popover-inner')
-	                .style('top', shiftY + 'px');
+	    _overlayLayers.filter(function (d) {
+	      return !d.source().isLocatorOverlay() && !d.source().isHidden();
+	    }).forEach(function (d) {
+	      return imageryUsed.push(d.source().imageryUsed());
+	    });
 
-	        } else {
-	            tooltip
-	                .classed('in', false)
-	                .call(uiToggle(false));
-	        }
+	    var dataLayer = context.layers().layer('data');
 
-	        curtain.cut(box, options.duration);
+	    if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
+	      imageryUsed.push(dataLayer.getSrc());
+	    }
 
-	        return tooltip;
+	    var photoOverlayLayers = {
+	      streetside: 'Bing Streetside',
+	      mapillary: 'Mapillary Images',
+	      'mapillary-map-features': 'Mapillary Map Features',
+	      'mapillary-signs': 'Mapillary Signs',
+	      openstreetcam: 'OpenStreetCam Images'
 	    };
 
+	    for (var layerID in photoOverlayLayers) {
+	      var layer = context.layers().layer(layerID);
 
-	    curtain.cut = function(datum, duration) {
-	        darkness.datum(datum)
-	            .interrupt();
+	      if (layer && layer.enabled()) {
+	        photoOverlaysUsed.push(layerID);
+	        imageryUsed.push(photoOverlayLayers[layerID]);
+	      }
+	    }
 
-	        var selection;
-	        if (duration === 0) {
-	            selection = darkness;
-	        } else {
-	            selection = darkness
-	                .transition()
-	                .duration(duration || 600)
-	                .ease(linear$1);
-	        }
-
-	        selection
-	            .attr('d', function(d) {
-	                var containerWidth = containerNode.clientWidth;
-	                var containerHeight = containerNode.clientHeight;
-	                var string = 'M 0,0 L 0,' + containerHeight + ' L ' +
-	                    containerWidth + ',' + containerHeight + 'L' +
-	                    containerWidth + ',0 Z';
-
-	                if (!d) { return string; }
-	                return string + 'M' +
-	                    d.left + ',' + d.top + 'L' +
-	                    d.left + ',' + (d.top + d.height) + 'L' +
-	                    (d.left + d.width) + ',' + (d.top + d.height) + 'L' +
-	                    (d.left + d.width) + ',' + (d.top) + 'Z';
+	    context.history().imageryUsed(imageryUsed);
+	    context.history().photoOverlaysUsed(photoOverlaysUsed);
+	  };
 
-	            });
-	    };
+	  var _checkedBlocklists;
 
+	  background.sources = function (extent, zoom, includeCurrent) {
+	    if (!_imageryIndex) return []; // called before init()?
 
-	    curtain.remove = function() {
-	        surface.remove();
-	        tooltip.remove();
-	        select(window).on('resize.curtain', null);
-	    };
+	    var visible = {};
+	    (_imageryIndex.query.bbox(extent.rectangle(), true) || []).forEach(function (d) {
+	      return visible[d.id] = true;
+	    });
+	    var currSource = baseLayer.source();
+	    var osm = context.connection();
+	    var blocklists = osm && osm.imageryBlocklists();
 
+	    if (blocklists && blocklists !== _checkedBlocklists) {
+	      _imageryIndex.backgrounds.forEach(function (source) {
+	        source.isBlocked = blocklists.some(function (blocklist) {
+	          return blocklist.test(source.template());
+	        });
+	      });
 
-	    // ClientRects are immutable, so copy them to an object,
-	    // in case we need to trim the height/width.
-	    function copyBox(src) {
-	        return {
-	            top: src.top,
-	            right: src.right,
-	            bottom: src.bottom,
-	            left: src.left,
-	            width: src.width,
-	            height: src.height
-	        };
+	      _checkedBlocklists = blocklists;
 	    }
 
+	    return _imageryIndex.backgrounds.filter(function (source) {
+	      if (includeCurrent && currSource === source) return true; // optionally always include the current imagery
 
-	    return curtain;
-	}
+	      if (source.isBlocked) return false; // even bundled sources may be blocked - #7905
 
-	function uiIntroWelcome(context, reveal) {
-	    var dispatch$1 = dispatch('done');
+	      if (!source.polygon) return true; // always include imagery with worldwide coverage
 
-	    var chapter = {
-	        title: 'intro.welcome.title'
-	    };
+	      if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms
 
+	      return visible[source.id]; // include imagery visible in given extent
+	    });
+	  };
 
-	    function welcome() {
-	        context.map().centerZoom([-85.63591, 41.94285], 19);
-	        reveal('.intro-nav-wrap .chapter-welcome',
-	            helpString('intro.welcome.welcome'),
-	            { buttonText: _t('intro.ok'), buttonCallback: practice }
-	        );
-	    }
+	  background.dimensions = function (val) {
+	    if (!val) return;
+	    baseLayer.dimensions(val);
 
-	    function practice() {
-	        reveal('.intro-nav-wrap .chapter-welcome',
-	            helpString('intro.welcome.practice'),
-	            { buttonText: _t('intro.ok'), buttonCallback: words }
-	        );
-	    }
+	    _overlayLayers.forEach(function (layer) {
+	      return layer.dimensions(val);
+	    });
+	  };
 
-	    function words() {
-	        reveal('.intro-nav-wrap .chapter-welcome',
-	            helpString('intro.welcome.words'),
-	            { buttonText: _t('intro.ok'), buttonCallback: chapters }
-	        );
-	    }
+	  background.baseLayerSource = function (d) {
+	    if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..
 
+	    var osm = context.connection();
+	    if (!osm) return background;
+	    var blocklists = osm.imageryBlocklists();
+	    var template = d.template();
+	    var fail = false;
+	    var tested = 0;
+	    var regex;
 
-	    function chapters() {
-	        dispatch$1.call('done');
-	        reveal('.intro-nav-wrap .chapter-navigation',
-	            helpString('intro.welcome.chapters', { next: _t('intro.navigation.title') })
-	        );
-	    }
+	    for (var i = 0; i < blocklists.length; i++) {
+	      regex = blocklists[i];
+	      fail = regex.test(template);
+	      tested++;
+	      if (fail) break;
+	    } // ensure at least one test was run.
 
 
-	    chapter.enter = function() {
-	        welcome();
-	    };
+	    if (!tested) {
+	      regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+	      fail = regex.test(template);
+	    }
 
+	    baseLayer.source(!fail ? d : background.findSource('none'));
+	    dispatch$1.call('change');
+	    background.updateImagery();
+	    return background;
+	  };
 
-	    chapter.exit = function() {
-	        context.container().select('.curtain-tooltip.intro-mouse')
-	            .selectAll('.counter')
-	            .remove();
-	    };
+	  background.findSource = function (id) {
+	    if (!id || !_imageryIndex) return null; // called before init()?
 
+	    return _imageryIndex.backgrounds.find(function (d) {
+	      return d.id && d.id === id;
+	    });
+	  };
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	  background.bing = function () {
+	    background.baseLayerSource(background.findSource('Bing'));
+	  };
 
+	  background.showsLayer = function (d) {
+	    var currSource = baseLayer.source();
+	    if (!d || !currSource) return false;
+	    return d.id === currSource.id || _overlayLayers.some(function (layer) {
+	      return d.id === layer.source().id;
+	    });
+	  };
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	  background.overlayLayerSources = function () {
+	    return _overlayLayers.map(function (layer) {
+	      return layer.source();
+	    });
+	  };
 
-	function uiIntroNavigation(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var timeouts = [];
-	    var hallId = 'n2061';
-	    var townHall = [-85.63591, 41.94285];
-	    var springStreetId = 'w397';
-	    var springStreetEndId = 'n1834';
-	    var springStreet = [-85.63582, 41.94255];
-	    var onewayField = _mainPresetIndex.field('oneway');
-	    var maxspeedField = _mainPresetIndex.field('maxspeed');
-
-
-	    var chapter = {
-	        title: 'intro.navigation.title'
-	    };
+	  background.toggleOverlayLayer = function (d) {
+	    var layer;
 
+	    for (var i = 0; i < _overlayLayers.length; i++) {
+	      layer = _overlayLayers[i];
+
+	      if (layer.source() === d) {
+	        _overlayLayers.splice(i, 1);
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
+	        dispatch$1.call('change');
+	        background.updateImagery();
+	        return;
+	      }
 	    }
 
+	    layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
-	    }
+	    _overlayLayers.push(layer);
+
+	    dispatch$1.call('change');
+	    background.updateImagery();
+	  };
 
+	  background.nudge = function (d, zoom) {
+	    var currSource = baseLayer.source();
 
-	    function isTownHallSelected() {
-	        var ids = context.selectedIDs();
-	        return ids.length === 1 && ids[0] === hallId;
+	    if (currSource) {
+	      currSource.nudge(d, zoom);
+	      dispatch$1.call('change');
+	      background.updateImagery();
 	    }
 
+	    return background;
+	  };
 
-	    function dragMap() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
+	  background.offset = function (d) {
+	    var currSource = baseLayer.source();
 
-	        var msec = transitionTime(townHall, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(townHall, 19, msec);
+	    if (!arguments.length) {
+	      return currSource && currSource.offset() || [0, 0];
+	    }
 
-	        timeout(function() {
-	            var centerStart = context.map().center();
+	    if (currSource) {
+	      currSource.offset(d);
+	      dispatch$1.call('change');
+	      background.updateImagery();
+	    }
 
-	            var textId = context.lastPointerType() === 'mouse' ? 'drag' : 'drag_touch';
-	            var dragString = helpString('intro.navigation.map_info') + '{br}' + helpString('intro.navigation.' + textId);
-	            reveal('.surface', dragString);
-	            context.map().on('drawn.intro', function() {
-	                reveal('.surface', dragString, { duration: 0 });
-	            });
+	    return background;
+	  };
 
-	            context.map().on('move.intro', function() {
-	                var centerNow = context.map().center();
-	                if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
-	                    context.map().on('move.intro', null);
-	                    timeout(function() { continueTo(zoomMap); }, 3000);
-	                }
-	            });
+	  background.brightness = function (d) {
+	    if (!arguments.length) return _brightness;
+	    _brightness = d;
+	    if (context.mode()) dispatch$1.call('change');
+	    return background;
+	  };
 
-	        }, msec + 100);
+	  background.contrast = function (d) {
+	    if (!arguments.length) return _contrast;
+	    _contrast = d;
+	    if (context.mode()) dispatch$1.call('change');
+	    return background;
+	  };
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	  background.saturation = function (d) {
+	    if (!arguments.length) return _saturation;
+	    _saturation = d;
+	    if (context.mode()) dispatch$1.call('change');
+	    return background;
+	  };
 
+	  background.sharpness = function (d) {
+	    if (!arguments.length) return _sharpness;
+	    _sharpness = d;
+	    if (context.mode()) dispatch$1.call('change');
+	    return background;
+	  };
 
-	    function zoomMap() {
-	        var zoomStart = context.map().zoom();
+	  var _loadPromise;
 
-	        var textId = context.lastPointerType() === 'mouse' ? 'zoom' : 'zoom_touch';
-	        var zoomString = helpString('intro.navigation.' + textId);
+	  background.ensureLoaded = function () {
+	    if (_loadPromise) return _loadPromise;
 
-	        reveal('.surface', zoomString);
+	    function parseMapParams(qmap) {
+	      if (!qmap) return false;
+	      var params = qmap.split('/').map(Number);
+	      if (params.length < 3 || params.some(isNaN)) return false;
+	      return geoExtent([params[2], params[1]]); // lon,lat
+	    }
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', zoomString, { duration: 0 });
-	        });
+	    var hash = utilStringQs(window.location.hash);
+	    var requested = hash.background || hash.layer;
+	    var extent = parseMapParams(hash.map);
+	    return _loadPromise = ensureImageryIndex().then(function (imageryIndex) {
+	      var first = imageryIndex.backgrounds.length && imageryIndex.backgrounds[0];
+	      var best;
 
-	        context.map().on('move.intro', function() {
-	            if (context.map().zoom() !== zoomStart) {
-	                context.map().on('move.intro', null);
-	                timeout(function() { continueTo(features); }, 3000);
-	            }
+	      if (!requested && extent) {
+	        best = background.sources(extent).find(function (s) {
+	          return s.best();
 	        });
+	      } // Decide which background layer to display
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
-	    }
 
+	      if (requested && requested.indexOf('custom:') === 0) {
+	        var template = requested.replace(/^custom:/, '');
+	        var custom = background.findSource('custom');
+	        background.baseLayerSource(custom.template(template));
+	        corePreferences('background-custom-template', template);
+	      } else {
+	        background.baseLayerSource(background.findSource(requested) || best || background.findSource(corePreferences('background-last-used')) || background.findSource('Bing') || first || background.findSource('none'));
+	      }
 
-	    function features() {
-	        var onClick = function() { continueTo(pointsLinesAreas); };
+	      var locator = imageryIndex.backgrounds.find(function (d) {
+	        return d.overlay && d["default"];
+	      });
 
-	        reveal('.surface', helpString('intro.navigation.features'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	      if (locator) {
+	        background.toggleOverlayLayer(locator);
+	      }
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', helpString('intro.navigation.features'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	      var overlays = (hash.overlays || '').split(',');
+	      overlays.forEach(function (overlay) {
+	        overlay = background.findSource(overlay);
 
-	        function continueTo(nextStep) {
-	            context.map().on('drawn.intro', null);
-	            nextStep();
+	        if (overlay) {
+	          background.toggleOverlayLayer(overlay);
 	        }
-	    }
+	      });
 
-	    function pointsLinesAreas() {
-	        var onClick = function() { continueTo(nodesWays); };
+	      if (hash.gpx) {
+	        var gpx = context.layers().layer('data');
 
-	        reveal('.surface', helpString('intro.navigation.points_lines_areas'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	        if (gpx) {
+	          gpx.url(hash.gpx, '.gpx');
+	        }
+	      }
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', helpString('intro.navigation.points_lines_areas'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
+	      if (hash.offset) {
+	        var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
+	          return !isNaN(n) && n;
 	        });
 
-	        function continueTo(nextStep) {
-	            context.map().on('drawn.intro', null);
-	            nextStep();
+	        if (offset.length === 2) {
+	          background.offset(geoMetersToOffset(offset));
 	        }
-	    }
+	      }
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  };
 
-	    function nodesWays() {
-	        var onClick = function() { continueTo(clickTownHall); };
+	  return utilRebind(background, dispatch$1, 'on');
+	}
 
-	        reveal('.surface', helpString('intro.navigation.nodes_ways'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	function rendererFeatures(context) {
+	  var dispatch$1 = dispatch('change', 'redraw');
+	  var features = utilRebind({}, dispatch$1, 'on');
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', helpString('intro.navigation.nodes_ways'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	  var _deferred = new Set();
 
-	        function continueTo(nextStep) {
-	            context.map().on('drawn.intro', null);
-	            nextStep();
-	        }
+	  var traffic_roads = {
+	    'motorway': true,
+	    'motorway_link': true,
+	    'trunk': true,
+	    'trunk_link': true,
+	    'primary': true,
+	    'primary_link': true,
+	    'secondary': true,
+	    'secondary_link': true,
+	    'tertiary': true,
+	    'tertiary_link': true,
+	    'residential': true,
+	    'unclassified': true,
+	    'living_street': true
+	  };
+	  var service_roads = {
+	    'service': true,
+	    'road': true,
+	    'track': true
+	  };
+	  var paths = {
+	    'path': true,
+	    'footway': true,
+	    'cycleway': true,
+	    'bridleway': true,
+	    'steps': true,
+	    'pedestrian': true
+	  };
+	  var past_futures = {
+	    'proposed': true,
+	    'construction': true,
+	    'abandoned': true,
+	    'dismantled': true,
+	    'disused': true,
+	    'razed': true,
+	    'demolished': true,
+	    'obliterated': true
+	  };
+	  var _cullFactor = 1;
+	  var _cache = {};
+	  var _rules = {};
+	  var _stats = {};
+	  var _keys = [];
+	  var _hidden = [];
+	  var _forceVisible = {};
+
+	  function update() {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
+	      var disabled = features.disabled();
+
+	      if (disabled.length) {
+	        hash.disable_features = disabled.join(',');
+	      } else {
+	        delete hash.disable_features;
+	      }
+
+	      window.location.replace('#' + utilQsString(hash, true));
+	      corePreferences('disabled-features', disabled.join(','));
 	    }
 
-	    function clickTownHall() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
+	    _hidden = features.hidden();
+	    dispatch$1.call('change');
+	    dispatch$1.call('redraw');
+	  }
 
-	        var entity = context.hasEntity(hallId);
-	        if (!entity) { return; }
-	        reveal(null, null, { duration: 0 });
-	        context.map().centerZoomEase(entity.loc, 19, 500);
-
-	        timeout(function() {
-	            var entity = context.hasEntity(hallId);
-	            if (!entity) { return; }
-	            var box = pointBox(entity.loc, context);
-	            var textId = context.lastPointerType() === 'mouse' ? 'click_townhall' : 'tap_townhall';
-	            reveal(box, helpString('intro.navigation.' + textId));
-
-	            context.map().on('move.intro drawn.intro', function() {
-	                var entity = context.hasEntity(hallId);
-	                if (!entity) { return; }
-	                var box = pointBox(entity.loc, context);
-	                reveal(box, helpString('intro.navigation.' + textId), { duration: 0 });
-	            });
+	  function defineRule(k, filter, max) {
+	    var isEnabled = true;
 
-	            context.on('enter.intro', function() {
-	                if (isTownHallSelected()) { continueTo(selectedTownHall); }
-	            });
+	    _keys.push(k);
 
-	        }, 550);  // after centerZoomEase
+	    _rules[k] = {
+	      filter: filter,
+	      enabled: isEnabled,
+	      // whether the user wants it enabled..
+	      count: 0,
+	      currentMax: max || Infinity,
+	      defaultMax: max || Infinity,
+	      enable: function enable() {
+	        this.enabled = true;
+	        this.currentMax = this.defaultMax;
+	      },
+	      disable: function disable() {
+	        this.enabled = false;
+	        this.currentMax = 0;
+	      },
+	      hidden: function hidden() {
+	        return this.count === 0 && !this.enabled || this.count > this.currentMax * _cullFactor;
+	      },
+	      autoHidden: function autoHidden() {
+	        return this.hidden() && this.currentMax > 0;
+	      }
+	    };
+	  }
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	  defineRule('points', function isPoint(tags, geometry) {
+	    return geometry === 'point';
+	  }, 200);
+	  defineRule('traffic_roads', function isTrafficRoad(tags) {
+	    return traffic_roads[tags.highway];
+	  });
+	  defineRule('service_roads', function isServiceRoad(tags) {
+	    return service_roads[tags.highway];
+	  });
+	  defineRule('paths', function isPath(tags) {
+	    return paths[tags.highway];
+	  });
+	  defineRule('buildings', function isBuilding(tags) {
+	    return !!tags.building && tags.building !== 'no' || tags.parking === 'multi-storey' || tags.parking === 'sheds' || tags.parking === 'carports' || tags.parking === 'garage_boxes';
+	  }, 250);
+	  defineRule('building_parts', function isBuildingPart(tags) {
+	    return tags['building:part'];
+	  });
+	  defineRule('indoor', function isIndoor(tags) {
+	    return tags.indoor;
+	  });
+	  defineRule('landuse', function isLanduse(tags, geometry) {
+	    return geometry === 'area' && !_rules.buildings.filter(tags) && !_rules.building_parts.filter(tags) && !_rules.indoor.filter(tags) && !_rules.water.filter(tags) && !_rules.pistes.filter(tags);
+	  });
+	  defineRule('boundaries', function isBoundary(tags) {
+	    return !!tags.boundary && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway] || tags.waterway || tags.railway || tags.landuse || tags.natural || tags.building || tags.power);
+	  });
+	  defineRule('water', function isWater(tags) {
+	    return !!tags.waterway || tags.natural === 'water' || tags.natural === 'coastline' || tags.natural === 'bay' || tags.landuse === 'pond' || tags.landuse === 'basin' || tags.landuse === 'reservoir' || tags.landuse === 'salt_pond';
+	  });
+	  defineRule('rail', function isRail(tags) {
+	    return (!!tags.railway || tags.landuse === 'railway') && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]);
+	  });
+	  defineRule('pistes', function isPiste(tags) {
+	    return tags['piste:type'];
+	  });
+	  defineRule('aerialways', function isPiste(tags) {
+	    return tags.aerialway && tags.aerialway !== 'yes' && tags.aerialway !== 'station';
+	  });
+	  defineRule('power', function isPower(tags) {
+	    return !!tags.power;
+	  }); // contains a past/future tag, but not in active use as a road/path/cycleway/etc..
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	  defineRule('past_future', function isPastFuture(tags) {
+	    if (traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]) {
+	      return false;
 	    }
 
+	    var strings = Object.keys(tags);
 
-	    function selectedTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
+	    for (var i = 0; i < strings.length; i++) {
+	      var s = strings[i];
 
-	        var entity = context.hasEntity(hallId);
-	        if (!entity) { return clickTownHall(); }
+	      if (past_futures[s] || past_futures[tags[s]]) {
+	        return true;
+	      }
+	    }
 
-	        var box = pointBox(entity.loc, context);
-	        var onClick = function() { continueTo(editorTownHall); };
+	    return false;
+	  }); // Lines or areas that don't match another feature filter.
+	  // IMPORTANT: The 'others' feature must be the last one defined,
+	  //   so that code in getMatches can skip this test if `hasMatch = true`
 
-	        reveal(box, helpString('intro.navigation.selected_townhall'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	  defineRule('others', function isOther(tags, geometry) {
+	    return geometry === 'line' || geometry === 'area';
+	  });
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var entity = context.hasEntity(hallId);
-	            if (!entity) { return; }
-	            var box = pointBox(entity.loc, context);
-	            reveal(box, helpString('intro.navigation.selected_townhall'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	  features.features = function () {
+	    return _rules;
+	  };
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	  features.keys = function () {
+	    return _keys;
+	  };
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	  features.enabled = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].enabled;
+	      });
 	    }
 
+	    return _rules[k] && _rules[k].enabled;
+	  };
 
-	    function editorTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
-
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-
-	        var onClick = function() { continueTo(presetTownHall); };
+	  features.disabled = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return !_rules[k].enabled;
+	      });
+	    }
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.navigation.editor_townhall'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	    return _rules[k] && !_rules[k].enabled;
+	  };
 
-	        context.on('exit.intro', function() {
-	            continueTo(clickTownHall);
-	        });
+	  features.hidden = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].hidden();
+	      });
+	    }
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	    return _rules[k] && _rules[k].hidden();
+	  };
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            nextStep();
-	        }
+	  features.autoHidden = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].autoHidden();
+	      });
 	    }
 
+	    return _rules[k] && _rules[k].autoHidden();
+	  };
 
-	    function presetTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
+	  features.enable = function (k) {
+	    if (_rules[k] && !_rules[k].enabled) {
+	      _rules[k].enable();
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	      update();
+	    }
+	  };
 
-	        // preset match, in case the user happened to change it.
-	        var entity = context.entity(context.selectedIDs()[0]);
-	        var preset = _mainPresetIndex.match(entity, context.graph());
+	  features.enableAll = function () {
+	    var didEnable = false;
 
-	        var onClick = function() { continueTo(fieldsTownHall); };
+	    for (var k in _rules) {
+	      if (!_rules[k].enabled) {
+	        didEnable = true;
 
-	        reveal('.entity-editor-pane .section-feature-type',
-	            helpString('intro.navigation.preset_townhall', { preset: preset.name() }),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	        _rules[k].enable();
+	      }
+	    }
 
-	        context.on('exit.intro', function() {
-	            continueTo(clickTownHall);
-	        });
+	    if (didEnable) update();
+	  };
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	  features.disable = function (k) {
+	    if (_rules[k] && _rules[k].enabled) {
+	      _rules[k].disable();
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            nextStep();
-	        }
+	      update();
 	    }
+	  };
 
+	  features.disableAll = function () {
+	    var didDisable = false;
 
-	    function fieldsTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
-
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-
-	        var onClick = function() { continueTo(closeTownHall); };
+	    for (var k in _rules) {
+	      if (_rules[k].enabled) {
+	        didDisable = true;
 
-	        reveal('.entity-editor-pane .section-preset-fields',
-	            helpString('intro.navigation.fields_townhall'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	        _rules[k].disable();
+	      }
+	    }
 
-	        context.on('exit.intro', function() {
-	            continueTo(clickTownHall);
-	        });
+	    if (didDisable) update();
+	  };
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	  features.toggle = function (k) {
+	    if (_rules[k]) {
+	      (function (f) {
+	        return f.enabled ? f.disable() : f.enable();
+	      })(_rules[k]);
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            nextStep();
-	        }
+	      update();
 	    }
+	  };
 
+	  features.resetStats = function () {
+	    for (var i = 0; i < _keys.length; i++) {
+	      _rules[_keys[i]].count = 0;
+	    }
 
-	    function closeTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
+	    dispatch$1.call('change');
+	  };
 
-	        var selector = '.entity-editor-pane button.close svg use';
-	        var href = select(selector).attr('href') || '#iD-icon-close';
+	  features.gatherStats = function (d, resolver, dimensions) {
+	    var needsRedraw = false;
+	    var types = utilArrayGroupBy(d, 'type');
+	    var entities = [].concat(types.relation || [], types.way || [], types.node || []);
+	    var currHidden, geometry, matches, i, j;
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.navigation.close_townhall', { button: icon(href, 'pre-text') })
-	        );
+	    for (i = 0; i < _keys.length; i++) {
+	      _rules[_keys[i]].count = 0;
+	    } // adjust the threshold for point/building culling based on viewport size..
+	    // a _cullFactor of 1 corresponds to a 1000x1000px viewport..
 
-	        context.on('exit.intro', function() {
-	            continueTo(searchStreet);
-	        });
 
-	        context.history().on('change.intro', function() {
-	            // update the close icon in the tooltip if the user edits something.
-	            var selector = '.entity-editor-pane button.close svg use';
-	            var href = select(selector).attr('href') || '#iD-icon-close';
+	    _cullFactor = dimensions[0] * dimensions[1] / 1000000;
 
-	            reveal('.entity-editor-pane',
-	                helpString('intro.navigation.close_townhall', { button: icon(href, 'pre-text') }),
-	                { duration: 0 }
-	            );
-	        });
+	    for (i = 0; i < entities.length; i++) {
+	      geometry = entities[i].geometry(resolver);
+	      matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	      for (j = 0; j < matches.length; j++) {
+	        _rules[matches[j]].count++;
+	      }
 	    }
 
+	    currHidden = features.hidden();
 
-	    function searchStreet() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');  // ensure spring street exists
+	    if (currHidden !== _hidden) {
+	      _hidden = currHidden;
+	      needsRedraw = true;
+	      dispatch$1.call('change');
+	    }
+
+	    return needsRedraw;
+	  };
 
-	        var msec = transitionTime(springStreet, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(springStreet, 19, msec);  // ..and user can see it
+	  features.stats = function () {
+	    for (var i = 0; i < _keys.length; i++) {
+	      _stats[_keys[i]] = _rules[_keys[i]].count;
+	    }
 
-	        timeout(function() {
-	            reveal('.search-header input',
-	                helpString('intro.navigation.search_street', { name: _t('intro.graph.name.spring-street') })
-	            );
+	    return _stats;
+	  };
 
-	            context.container().select('.search-header input')
-	                .on('keyup.intro', checkSearchResult);
-	        }, msec + 100);
+	  features.clear = function (d) {
+	    for (var i = 0; i < d.length; i++) {
+	      features.clearEntity(d[i]);
 	    }
+	  };
+
+	  features.clearEntity = function (entity) {
+	    delete _cache[osmEntity.key(entity)];
+	  };
 
+	  features.reset = function () {
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	    function checkSearchResult() {
-	        var first = context.container().select('.feature-list-item:nth-child(0n+2)');  // skip "No Results" item
-	        var firstName = first.select('.entity-name');
-	        var name = _t('intro.graph.name.spring-street');
+	      _deferred["delete"](handle);
+	    });
+	    _cache = {};
+	  }; // only certain relations are worth checking
 
-	        if (!firstName.empty() && firstName.text() === name) {
-	            reveal(first.node(),
-	                helpString('intro.navigation.choose_street', { name: name }),
-	                { duration: 300 }
-	            );
 
-	            context.on('exit.intro', function() {
-	                continueTo(selectedStreet);
-	            });
+	  function relationShouldBeChecked(relation) {
+	    // multipolygon features have `area` geometry and aren't checked here
+	    return relation.tags.type === 'boundary';
+	  }
 
-	            context.container().select('.search-header input')
-	                .on('keydown.intro', eventCancel, true)
-	                .on('keyup.intro', null);
-	        }
+	  features.getMatches = function (entity, resolver, geometry) {
+	    if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
+	    var ent = osmEntity.key(entity);
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.container().select('.search-header input')
-	                .on('keydown.intro', null)
-	                .on('keyup.intro', null);
-	            nextStep();
-	        }
+	    if (!_cache[ent]) {
+	      _cache[ent] = {};
 	    }
 
+	    if (!_cache[ent].matches) {
+	      var matches = {};
+	      var hasMatch = false;
 
-	    function selectedStreet() {
-	        if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-	            return searchStreet();
-	        }
+	      for (var i = 0; i < _keys.length; i++) {
+	        if (_keys[i] === 'others') {
+	          if (hasMatch) continue; // If an entity...
+	          //   1. is a way that hasn't matched other 'interesting' feature rules,
 
-	        var onClick = function() { continueTo(editorStreet); };
-	        var entity = context.entity(springStreetEndId);
-	        var box = pointBox(entity.loc, context);
-	        box.height = 500;
+	          if (entity.type === 'way') {
+	            var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation
 
-	        reveal(box,
-	            helpString('intro.navigation.selected_street', { name: _t('intro.graph.name.spring-street') }),
-	            { duration: 600, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	            if (parents.length === 1 && parents[0].isMultipolygon() || // 2b. or belongs only to boundary relations
+	            parents.length > 0 && parents.every(function (parent) {
+	              return parent.tags.type === 'boundary';
+	            })) {
+	              // ...then match whatever feature rules the parent relation has matched.
+	              // see #2548, #2887
+	              //
+	              // IMPORTANT:
+	              // For this to work, getMatches must be called on relations before ways.
+	              //
+	              var pkey = osmEntity.key(parents[0]);
 
-	        timeout(function() {
-	            context.map().on('move.intro drawn.intro', function() {
-	                var entity = context.hasEntity(springStreetEndId);
-	                if (!entity) { return; }
-	                var box = pointBox(entity.loc, context);
-	                box.height = 500;
-	                reveal(box,
-	                    helpString('intro.navigation.selected_street', { name: _t('intro.graph.name.spring-street') }),
-	                    { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	                );
-	            });
-	        }, 600);  // after reveal.
+	              if (_cache[pkey] && _cache[pkey].matches) {
+	                matches = Object.assign({}, _cache[pkey].matches); // shallow copy
 
-	        context.on('enter.intro', function(mode) {
-	            if (!context.hasEntity(springStreetId)) {
-	                return continueTo(searchStreet);
-	            }
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== springStreetId) {
-	                // keep Spring Street selected..
-	                context.enter(modeSelect(context, [springStreetId]));
+	                continue;
+	              }
 	            }
-	        });
+	          }
+	        }
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-	                timeout(function() {
-	                    continueTo(searchStreet);
-	                }, 300);  // after any transition (e.g. if user deleted intersection)
-	            }
-	        });
+	        if (_rules[_keys[i]].filter(entity.tags, geometry)) {
+	          matches[_keys[i]] = hasMatch = true;
+	        }
+	      }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	      _cache[ent].matches = matches;
 	    }
 
+	    return _cache[ent].matches;
+	  };
 
-	    function editorStreet() {
-	        var selector = '.entity-editor-pane button.close svg use';
-	        var href = select(selector).attr('href') || '#iD-icon-close';
+	  features.getParents = function (entity, resolver, geometry) {
+	    if (geometry === 'point') return [];
+	    var ent = osmEntity.key(entity);
 
-	        reveal('.entity-editor-pane', helpString('intro.navigation.street_different_fields') + '{br}' +
-	            helpString('intro.navigation.editor_street', {
-	                button: icon(href, 'pre-text'),
-	                field1: onewayField.label(),
-	                field2: maxspeedField.label()
-	            }));
+	    if (!_cache[ent]) {
+	      _cache[ent] = {};
+	    }
 
-	        context.on('exit.intro', function() {
-	            continueTo(play);
-	        });
+	    if (!_cache[ent].parents) {
+	      var parents = [];
 
-	        context.history().on('change.intro', function() {
-	            // update the close icon in the tooltip if the user edits something.
-	            var selector = '.entity-editor-pane button.close svg use';
-	            var href = select(selector).attr('href') || '#iD-icon-close';
-
-	            reveal('.entity-editor-pane', helpString('intro.navigation.street_different_fields') + '{br}' +
-	                helpString('intro.navigation.editor_street', {
-	                    button: icon(href, 'pre-text'),
-	                    field1: onewayField.label(),
-	                    field2: maxspeedField.label()
-	                }), { duration: 0 }
-	            );
-	        });
+	      if (geometry === 'vertex') {
+	        parents = resolver.parentWays(entity);
+	      } else {
+	        // 'line', 'area', 'relation'
+	        parents = resolver.parentRelations(entity);
+	      }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	      _cache[ent].parents = parents;
 	    }
 
+	    return _cache[ent].parents;
+	  };
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.navigation.play', { next: _t('intro.points.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-point',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
-	    }
+	  features.isHiddenPreset = function (preset, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!preset.tags) return false;
+	    var test = preset.setTags({}, geometry);
 
+	    for (var key in _rules) {
+	      if (_rules[key].filter(test, geometry)) {
+	        if (_hidden.indexOf(key) !== -1) {
+	          return key;
+	        }
 
-	    chapter.enter = function() {
-	        dragMap();
-	    };
+	        return false;
+	      }
+	    }
 
+	    return false;
+	  };
 
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', null);
-	        context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
-	    };
+	  features.isHiddenFeature = function (entity, resolver, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!entity.version) return false;
+	    if (_forceVisible[entity.id]) return false;
+	    var matches = Object.keys(features.getMatches(entity, resolver, geometry));
+	    return matches.length && matches.every(function (k) {
+	      return features.hidden(k);
+	    });
+	  };
 
+	  features.isHiddenChild = function (entity, resolver, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!entity.version || geometry === 'point') return false;
+	    if (_forceVisible[entity.id]) return false;
+	    var parents = features.getParents(entity, resolver, geometry);
+	    if (!parents.length) return false;
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	    for (var i = 0; i < parents.length; i++) {
+	      if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
+	        return false;
+	      }
+	    }
 
+	    return true;
+	  };
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	  features.hasHiddenConnections = function (entity, resolver) {
+	    if (!_hidden.length) return false;
+	    var childNodes, connections;
 
-	function uiIntroPoint(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var timeouts = [];
-	    var intersection = [-85.63279, 41.94394];
-	    var building = [-85.632422, 41.944045];
-	    var cafePreset = _mainPresetIndex.item('amenity/cafe');
-	    var _pointID = null;
+	    if (entity.type === 'midpoint') {
+	      childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
+	      connections = [];
+	    } else {
+	      childNodes = entity.nodes ? resolver.childNodes(entity) : [];
+	      connections = features.getParents(entity, resolver, entity.geometry(resolver));
+	    } // gather ways connected to child nodes..
 
 
-	    var chapter = {
-	        title: 'intro.points.title'
-	    };
+	    connections = childNodes.reduce(function (result, e) {
+	      return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
+	    }, connections);
+	    return connections.some(function (e) {
+	      return features.isHidden(e, resolver, e.geometry(resolver));
+	    });
+	  };
 
+	  features.isHidden = function (entity, resolver, geometry) {
+	    if (!_hidden.length) return false;
+	    if (!entity.version) return false;
+	    var fn = geometry === 'vertex' ? features.isHiddenChild : features.isHiddenFeature;
+	    return fn(entity, resolver, geometry);
+	  };
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
-	    }
+	  features.filter = function (d, resolver) {
+	    if (!_hidden.length) return d;
+	    var result = [];
 
+	    for (var i = 0; i < d.length; i++) {
+	      var entity = d[i];
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	      if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
+	        result.push(entity);
+	      }
 	    }
 
+	    return result;
+	  };
 
-	    function addPoint() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
-
-	        var msec = transitionTime(intersection, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(intersection, 19, msec);
-
-	        timeout(function() {
-	            var tooltip = reveal('button.add-point',
-	                helpString('intro.points.points_info') + '{br}' + helpString('intro.points.add_point'));
-
-	            _pointID = null;
-
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-points');
+	  features.forceVisible = function (entityIDs) {
+	    if (!arguments.length) return Object.keys(_forceVisible);
+	    _forceVisible = {};
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-point') { return; }
-	                continueTo(placePoint);
-	            });
-	        }, msec + 100);
+	    for (var i = 0; i < entityIDs.length; i++) {
+	      _forceVisible[entityIDs[i]] = true;
+	      var entity = context.hasEntity(entityIDs[i]);
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
+	      if (entity && entity.type === 'relation') {
+	        // also show relation members (one level deep)
+	        for (var j in entity.members) {
+	          _forceVisible[entity.members[j].id] = true;
 	        }
+	      }
 	    }
 
+	    return features;
+	  };
 
-	    function placePoint() {
-	        if (context.mode().id !== 'add-point') {
-	            return chapter.restart();
-	        }
-
-	        var pointBox = pad(building, 150, context);
-	        var textId = context.lastPointerType() === 'mouse' ? 'place_point' : 'place_point_touch';
-	        reveal(pointBox, helpString('intro.points.' + textId));
+	  features.init = function () {
+	    var storage = corePreferences('disabled-features');
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            pointBox = pad(building, 150, context);
-	            reveal(pointBox, helpString('intro.points.' + textId), { duration: 0 });
-	        });
+	    if (storage) {
+	      var storageDisabled = storage.replace(/;/g, ',').split(',');
+	      storageDisabled.forEach(features.disable);
+	    }
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') { return chapter.restart(); }
-	            _pointID = context.mode().selectedIDs()[0];
-	            continueTo(searchPreset);
-	        });
+	    var hash = utilStringQs(window.location.hash);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    if (hash.disable_features) {
+	      var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
+	      hashDisabled.forEach(features.disable);
 	    }
+	  }; // warm up the feature matching cache upon merging fetched data
 
 
-	    function searchPreset() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return addPoint();
-	        }
-
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	  context.history().on('merge.features', function (newEntities) {
+	    if (!newEntities) return;
+	    var handle = window.requestIdleCallback(function () {
+	      var graph = context.graph();
+	      var types = utilArrayGroupBy(newEntities, 'type'); // ensure that getMatches is called on relations before ways
 
-	        context.container().select('.preset-search-input')
-	            .on('keydown.intro', null)
-	            .on('keyup.intro', checkPresetSearch);
+	      var entities = [].concat(types.relation || [], types.way || [], types.node || []);
 
-	        reveal('.preset-search-input',
-	            helpString('intro.points.search_cafe', { preset: cafePreset.name() })
-	        );
+	      for (var i = 0; i < entities.length; i++) {
+	        var geometry = entities[i].geometry(graph);
+	        features.getMatches(entities[i], graph, geometry);
+	      }
+	    });
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_pointID || !context.hasEntity(_pointID)) {
-	                return continueTo(addPoint);
-	            }
+	    _deferred.add(handle);
+	  });
+	  return features;
+	}
 
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
-	                // keep the user's point selected..
-	                context.enter(modeSelect(context, [_pointID]));
+	//
+	// - the activeID - nope
+	// - 1 away (adjacent) to the activeID - yes (vertices will be merged)
+	// - 2 away from the activeID - nope (would create a self intersecting segment)
+	// - all others on a linear way - yes
+	// - all others on a closed way - nope (would create a self intersecting polygon)
+	//
+	// returns
+	// 0 = active vertex - no touch/connect
+	// 1 = passive vertex - yes touch/connect
+	// 2 = adjacent vertex - yes but pay attention segmenting a line here
+	//
 
-	                // disallow scrolling
-	                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	function svgPassiveVertex(node, graph, activeID) {
+	  if (!activeID) return 1;
+	  if (activeID === node.id) return 0;
+	  var parents = graph.parentWays(node);
+	  var i, j, nodes, isClosed, ix1, ix2, ix3, ix4, max;
+
+	  for (i = 0; i < parents.length; i++) {
+	    nodes = parents[i].nodes;
+	    isClosed = parents[i].isClosed();
+
+	    for (j = 0; j < nodes.length; j++) {
+	      // find this vertex, look nearby
+	      if (nodes[j] === node.id) {
+	        ix1 = j - 2;
+	        ix2 = j - 1;
+	        ix3 = j + 1;
+	        ix4 = j + 2;
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', null)
-	                    .on('keyup.intro', checkPresetSearch);
+	        if (isClosed) {
+	          // wraparound if needed
+	          max = nodes.length - 1;
+	          if (ix1 < 0) ix1 = max + ix1;
+	          if (ix2 < 0) ix2 = max + ix2;
+	          if (ix3 > max) ix3 = ix3 - max;
+	          if (ix4 > max) ix4 = ix4 - max;
+	        }
+
+	        if (nodes[ix1] === activeID) return 0; // no - prevent self intersect
+	        else if (nodes[ix2] === activeID) return 2; // ok - adjacent
+	          else if (nodes[ix3] === activeID) return 2; // ok - adjacent
+	            else if (nodes[ix4] === activeID) return 0; // no - prevent self intersect
+	              else if (isClosed && nodes.indexOf(activeID) !== -1) return 0; // no - prevent self intersect
+	      }
+	    }
+	  }
 
-	                reveal('.preset-search-input',
-	                    helpString('intro.points.search_cafe', { preset: cafePreset.name() })
-	                );
+	  return 1; // ok
+	}
+	function svgMarkerSegments(projection, graph, dt, shouldReverse, bothDirections) {
+	  return function (entity) {
+	    var i = 0;
+	    var offset = dt;
+	    var segments = [];
+	    var clip = d3_geoIdentity().clipExtent(projection.clipExtent()).stream;
+	    var coordinates = graph.childNodes(entity).map(function (n) {
+	      return n.loc;
+	    });
+	    var a, b;
 
-	                context.history().on('change.intro', null);
-	            }
-	        });
+	    if (shouldReverse(entity)) {
+	      coordinates.reverse();
+	    }
 
+	    d3_geoStream({
+	      type: 'LineString',
+	      coordinates: coordinates
+	    }, projection.stream(clip({
+	      lineStart: function lineStart() {},
+	      lineEnd: function lineEnd() {
+	        a = null;
+	      },
+	      point: function point(x, y) {
+	        b = [x, y];
 
-	        function checkPresetSearch() {
-	            var first = context.container().select('.preset-list-item:first-child');
+	        if (a) {
+	          var span = geoVecLength(a, b) - offset;
 
-	            if (first.classed('preset-amenity-cafe')) {
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', eventCancel, true)
-	                    .on('keyup.intro', null);
+	          if (span >= 0) {
+	            var heading = geoVecAngle(a, b);
+	            var dx = dt * Math.cos(heading);
+	            var dy = dt * Math.sin(heading);
+	            var p = [a[0] + offset * Math.cos(heading), a[1] + offset * Math.sin(heading)]; // gather coordinates
 
-	                reveal(first.select('.preset-list-button').node(),
-	                    helpString('intro.points.choose_cafe', { preset: cafePreset.name() }),
-	                    { duration: 300 }
-	                );
+	            var coord = [a, p];
 
-	                context.history().on('change.intro', function() {
-	                    continueTo(aboutFeatureEditor);
-	                });
+	            for (span -= dt; span >= 0; span -= dt) {
+	              p = geoVecAdd(p, [dx, dy]);
+	              coord.push(p);
 	            }
-	        }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	            nextStep();
-	        }
-	    }
+	            coord.push(b); // generate svg paths
 
+	            var segment = '';
+	            var j;
 
-	    function aboutFeatureEditor() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return addPoint();
-	        }
+	            for (j = 0; j < coord.length; j++) {
+	              segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+	            }
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane', helpString('intro.points.feature_editor'), {
-	                tooltipClass: 'intro-points-describe',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { continueTo(addName); }
+	            segments.push({
+	              id: entity.id,
+	              index: i++,
+	              d: segment
 	            });
-	        }, 400);
 
-	        context.on('exit.intro', function() {
-	            // if user leaves select mode here, just continue with the tutorial.
-	            continueTo(reselectPoint);
-	        });
+	            if (bothDirections(entity)) {
+	              segment = '';
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	              for (j = coord.length - 1; j >= 0; j--) {
+	                segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+	              }
 
+	              segments.push({
+	                id: entity.id,
+	                index: i++,
+	                d: segment
+	              });
+	            }
+	          }
 
-	    function addName() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return addPoint();
+	          offset = -span;
 	        }
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	        a = b;
+	      }
+	    })));
+	    return segments;
+	  };
+	}
+	function svgPath(projection, graph, isArea) {
+	  // Explanation of magic numbers:
+	  // "padding" here allows space for strokes to extend beyond the viewport,
+	  // so that the stroke isn't drawn along the edge of the viewport when
+	  // the shape is clipped.
+	  //
+	  // When drawing lines, pad viewport by 5px.
+	  // When drawing areas, pad viewport by 65px in each direction to allow
+	  // for 60px area fill stroke (see ".fill-partial path.fill" css rule)
+	  var cache = {};
+	  var padding = isArea ? 65 : 5;
+	  var viewport = projection.clipExtent();
+	  var paddedExtent = [[viewport[0][0] - padding, viewport[0][1] - padding], [viewport[1][0] + padding, viewport[1][1] + padding]];
+	  var clip = d3_geoIdentity().clipExtent(paddedExtent).stream;
+	  var project = projection.stream;
+	  var path = d3_geoPath().projection({
+	    stream: function stream(output) {
+	      return project(clip(output));
+	    }
+	  });
 
-	        var addNameString = helpString('intro.points.fields_info') + '{br}' + helpString('intro.points.add_name');
+	  var svgpath = function svgpath(entity) {
+	    if (entity.id in cache) {
+	      return cache[entity.id];
+	    } else {
+	      return cache[entity.id] = path(entity.asGeoJSON(graph));
+	    }
+	  };
 
-	        timeout(function() {
-	            // It's possible for the user to add a name in a previous step..
-	            // If so, don't tell them to add the name in this step.
-	            // Give them an OK button instead.
-	            var entity = context.entity(_pointID);
-	            if (entity.tags.name) {
-	                var tooltip = reveal('.entity-editor-pane', addNameString, {
-	                    tooltipClass: 'intro-points-describe',
-	                    buttonText: _t('intro.ok'),
-	                    buttonCallback: function() { continueTo(addCloseEditor); }
-	                });
-	                tooltip.select('.instruction').style('display', 'none');
+	  svgpath.geojson = function (d) {
+	    if (d.__featurehash__ !== undefined) {
+	      if (d.__featurehash__ in cache) {
+	        return cache[d.__featurehash__];
+	      } else {
+	        return cache[d.__featurehash__] = path(d);
+	      }
+	    } else {
+	      return path(d);
+	    }
+	  };
 
-	            } else {
-	                reveal('.entity-editor-pane', addNameString,
-	                    { tooltipClass: 'intro-points-describe' }
-	                );
-	            }
-	        }, 400);
+	  return svgpath;
+	}
+	function svgPointTransform(projection) {
+	  var svgpoint = function svgpoint(entity) {
+	    // http://jsperf.com/short-array-join
+	    var pt = projection(entity.loc);
+	    return 'translate(' + pt[0] + ',' + pt[1] + ')';
+	  };
 
-	        context.history().on('change.intro', function() {
-	            continueTo(addCloseEditor);
-	        });
+	  svgpoint.geojson = function (d) {
+	    return svgpoint(d.properties.entity);
+	  };
 
-	        context.on('exit.intro', function() {
-	            // if user leaves select mode here, just continue with the tutorial.
-	            continueTo(reselectPoint);
-	        });
+	  return svgpoint;
+	}
+	function svgRelationMemberTags(graph) {
+	  return function (entity) {
+	    var tags = entity.tags;
+	    var shouldCopyMultipolygonTags = !entity.hasInterestingTags();
+	    graph.parentRelations(entity).forEach(function (relation) {
+	      var type = relation.tags.type;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	      if (type === 'multipolygon' && shouldCopyMultipolygonTags || type === 'boundary') {
+	        tags = Object.assign({}, relation.tags, tags);
+	      }
+	    });
+	    return tags;
+	  };
+	}
+	function svgSegmentWay(way, graph, activeID) {
+	  // When there is no activeID, we can memoize this expensive computation
+	  if (activeID === undefined) {
+	    return graph["transient"](way, 'waySegments', getWaySegments);
+	  } else {
+	    return getWaySegments();
+	  }
+
+	  function getWaySegments() {
+	    var isActiveWay = way.nodes.indexOf(activeID) !== -1;
+	    var features = {
+	      passive: [],
+	      active: []
+	    };
+	    var start = {};
+	    var end = {};
+	    var node, type;
 
+	    for (var i = 0; i < way.nodes.length; i++) {
+	      node = graph.entity(way.nodes[i]);
+	      type = svgPassiveVertex(node, graph, activeID);
+	      end = {
+	        node: node,
+	        type: type
+	      };
 
-	    function addCloseEditor() {
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	      if (start.type !== undefined) {
+	        if (start.node.id === activeID || end.node.id === activeID) ; else if (isActiveWay && (start.type === 2 || end.type === 2)) {
+	          // one adjacent vertex
+	          pushActive(start, end, i);
+	        } else if (start.type === 0 && end.type === 0) {
+	          // both active vertices
+	          pushActive(start, end, i);
+	        } else {
+	          pushPassive(start, end, i);
+	        }
+	      }
 
-	        var selector = '.entity-editor-pane button.close svg use';
-	        var href = select(selector).attr('href') || '#iD-icon-close';
+	      start = end;
+	    }
 
-	        context.on('exit.intro', function() {
-	            continueTo(reselectPoint);
-	        });
+	    return features;
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.points.add_close', { button: icon(href, 'pre-text') })
-	        );
+	    function pushActive(start, end, index) {
+	      features.active.push({
+	        type: 'Feature',
+	        id: way.id + '-' + index + '-nope',
+	        properties: {
+	          nope: true,
+	          target: true,
+	          entity: way,
+	          nodes: [start.node, end.node],
+	          index: index
+	        },
+	        geometry: {
+	          type: 'LineString',
+	          coordinates: [start.node.loc, end.node.loc]
+	        }
+	      });
+	    }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
+	    function pushPassive(start, end, index) {
+	      features.passive.push({
+	        type: 'Feature',
+	        id: way.id + '-' + index,
+	        properties: {
+	          target: true,
+	          entity: way,
+	          nodes: [start.node, end.node],
+	          index: index
+	        },
+	        geometry: {
+	          type: 'LineString',
+	          coordinates: [start.node.loc, end.node.loc]
 	        }
+	      });
 	    }
+	  }
+	}
 
+	function svgTagClasses() {
+	  var primaries = ['building', 'highway', 'railway', 'waterway', 'aeroway', 'aerialway', 'piste:type', 'boundary', 'power', 'amenity', 'natural', 'landuse', 'leisure', 'military', 'place', 'man_made', 'route', 'attraction', 'building:part', 'indoor'];
+	  var statuses = [// nonexistent, might be built
+	  'proposed', 'planned', // under maintentance or between groundbreaking and opening
+	  'construction', // existent but not functional
+	  'disused', // dilapidated to nonexistent
+	  'abandoned', // nonexistent, still may appear in imagery
+	  'dismantled', 'razed', 'demolished', 'obliterated', // existent occasionally, e.g. stormwater drainage basin
+	  'intermittent'];
+	  var secondaries = ['oneway', 'bridge', 'tunnel', 'embankment', 'cutting', 'barrier', 'surface', 'tracktype', 'footway', 'crossing', 'service', 'sport', 'public_transport', 'location', 'parking', 'golf', 'type', 'leisure', 'man_made', 'indoor'];
+
+	  var _tags = function _tags(entity) {
+	    return entity.tags;
+	  };
+
+	  var tagClasses = function tagClasses(selection) {
+	    selection.each(function tagClassesEach(entity) {
+	      var value = this.className;
+
+	      if (value.baseVal !== undefined) {
+	        value = value.baseVal;
+	      }
 
-	    function reselectPoint() {
-	        if (!_pointID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_pointID);
-	        if (!entity) { return chapter.restart(); }
+	      var t = _tags(entity);
 
-	        // make sure it's still a cafe, in case user somehow changed it..
-	        var oldPreset = _mainPresetIndex.match(entity, context.graph());
-	        context.replace(actionChangePreset(_pointID, oldPreset, cafePreset));
+	      var computed = tagClasses.getClassesString(t, value);
 
-	        context.enter(modeBrowse(context));
+	      if (computed !== value) {
+	        select(this).attr('class', computed);
+	      }
+	    });
+	  };
 
-	        var msec = transitionTime(entity.loc, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerEase(entity.loc, msec);
+	  tagClasses.getClassesString = function (t, value) {
+	    var primary, status;
+	    var i, j, k, v; // in some situations we want to render perimeter strokes a certain way
 
-	        timeout(function() {
-	            var box = pointBox(entity.loc, context);
-	            reveal(box, helpString('intro.points.reselect'), { duration: 600 });
+	    var overrideGeometry;
 
-	            timeout(function() {
-	                context.map().on('move.intro drawn.intro', function() {
-	                    var entity = context.hasEntity(_pointID);
-	                    if (!entity) { return chapter.restart(); }
-	                    var box = pointBox(entity.loc, context);
-	                    reveal(box, helpString('intro.points.reselect'), { duration: 0 });
-	                });
-	            }, 600); // after reveal..
+	    if (/\bstroke\b/.test(value)) {
+	      if (!!t.barrier && t.barrier !== 'no') {
+	        overrideGeometry = 'line';
+	      }
+	    } // preserve base classes (nothing with `tag-`)
+
+
+	    var classes = value.trim().split(/\s+/).filter(function (klass) {
+	      return klass.length && !/^tag-/.test(klass);
+	    }).map(function (klass) {
+	      // special overrides for some perimeter strokes
+	      return klass === 'line' || klass === 'area' ? overrideGeometry || klass : klass;
+	    }); // pick at most one primary classification tag..
+
+	    for (i = 0; i < primaries.length; i++) {
+	      k = primaries[i];
+	      v = t[k];
+	      if (!v || v === 'no') continue;
+
+	      if (k === 'piste:type') {
+	        // avoid a ':' in the class name
+	        k = 'piste';
+	      } else if (k === 'building:part') {
+	        // avoid a ':' in the class name
+	        k = 'building_part';
+	      }
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'select') { return; }
-	                continueTo(updatePoint);
-	            });
+	      primary = k;
 
-	        }, msec + 100);
+	      if (statuses.indexOf(v) !== -1) {
+	        // e.g. `railway=abandoned`
+	        status = v;
+	        classes.push('tag-' + k);
+	      } else {
+	        classes.push('tag-' + k);
+	        classes.push('tag-' + k + '-' + v);
+	      }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	      break;
 	    }
 
+	    if (!primary) {
+	      for (i = 0; i < statuses.length; i++) {
+	        for (j = 0; j < primaries.length; j++) {
+	          k = statuses[i] + ':' + primaries[j]; // e.g. `demolished:building=yes`
 
-	    function updatePoint() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return continueTo(reselectPoint);
+	          v = t[k];
+	          if (!v || v === 'no') continue;
+	          status = statuses[i];
+	          break;
 	        }
+	      }
+	    } // add at most one status tag, only if relates to primary tag..
+
+
+	    if (!status) {
+	      for (i = 0; i < statuses.length; i++) {
+	        k = statuses[i];
+	        v = t[k];
+	        if (!v || v === 'no') continue;
+
+	        if (v === 'yes') {
+	          // e.g. `railway=rail + abandoned=yes`
+	          status = k;
+	        } else if (primary && primary === v) {
+	          // e.g. `railway=rail + abandoned=railway`
+	          status = k;
+	        } else if (!primary && primaries.indexOf(v) !== -1) {
+	          // e.g. `abandoned=railway`
+	          status = k;
+	          primary = v;
+	          classes.push('tag-' + v);
+	        } // else ignore e.g.  `highway=path + abandoned=railway`
+
+
+	        if (status) break;
+	      }
+	    }
 
-	        // reset pane, in case user happened to untag the point..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    if (status) {
+	      classes.push('tag-status');
+	      classes.push('tag-status-' + status);
+	    } // add any secondary tags
 
-	        context.on('exit.intro', function() {
-	            continueTo(reselectPoint);
-	        });
 
-	        context.history().on('change.intro', function() {
-	            continueTo(updateCloseEditor);
-	        });
+	    for (i = 0; i < secondaries.length; i++) {
+	      k = secondaries[i];
+	      v = t[k];
+	      if (!v || v === 'no' || k === primary) continue;
+	      classes.push('tag-' + k);
+	      classes.push('tag-' + k + '-' + v);
+	    } // For highways, look for surface tagging..
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane', helpString('intro.points.update'),
-	                { tooltipClass: 'intro-points-describe' }
-	            );
-	        }, 400);
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	    if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
+	      var surface = t.highway === 'track' ? 'unpaved' : 'paved';
 
+	      for (k in t) {
+	        v = t[k];
 
-	    function updateCloseEditor() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return continueTo(reselectPoint);
+	        if (k in osmPavedTags) {
+	          surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
 	        }
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	        if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
+	          surface = 'semipaved';
+	        }
+	      }
 
-	        context.on('exit.intro', function() {
-	            continueTo(rightClickPoint);
-	        });
+	      classes.push('tag-' + surface);
+	    } // If this is a wikidata-tagged item, add a class for that..
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.points.update_close', { button: icon('#iD-icon-close', 'pre-text') })
-	            );
-	        }, 500);
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    if (t.wikidata || t['brand:wikidata']) {
+	      classes.push('tag-wikidata');
 	    }
 
+	    return classes.join(' ').trim();
+	  };
 
-	    function rightClickPoint() {
-	        if (!_pointID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_pointID);
-	        if (!entity) { return chapter.restart(); }
+	  tagClasses.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
+	    return tagClasses;
+	  };
 
-	        context.enter(modeBrowse(context));
+	  return tagClasses;
+	}
 
-	        var box = pointBox(entity.loc, context);
-	        var textId = context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch';
-	        reveal(box, helpString('intro.points.' + textId), { duration: 600 });
-
-	        timeout(function() {
-	            context.map().on('move.intro', function() {
-	                var entity = context.hasEntity(_pointID);
-	                if (!entity) { return chapter.restart(); }
-	                var box = pointBox(entity.loc, context);
-	                reveal(box, helpString('intro.points.' + textId), { duration: 0 });
-	            });
-	        }, 600); // after reveal
-
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') { return; }
-	            var ids = context.selectedIDs();
-	            if (ids.length !== 1 || ids[0] !== _pointID) { return; }
-
-	            timeout(function() {
-	                var node = selectMenuItem(context, 'delete').node();
-	                if (!node) { return; }
-	                continueTo(enterDelete);
-	            }, 50);  // after menu visible
-	        });
+	// Patterns only work in Firefox when set directly on element.
+	// (This is not a bug: https://bugzilla.mozilla.org/show_bug.cgi?id=750632)
+	var patterns = {
+	  // tag - pattern name
+	  // -or-
+	  // tag - value - pattern name
+	  // -or-
+	  // tag - value - rules (optional tag-values, pattern name)
+	  // (matches earlier rules first, so fallback should be last entry)
+	  amenity: {
+	    grave_yard: 'cemetery',
+	    fountain: 'water_standing'
+	  },
+	  landuse: {
+	    cemetery: [{
+	      religion: 'christian',
+	      pattern: 'cemetery_christian'
+	    }, {
+	      religion: 'buddhist',
+	      pattern: 'cemetery_buddhist'
+	    }, {
+	      religion: 'muslim',
+	      pattern: 'cemetery_muslim'
+	    }, {
+	      religion: 'jewish',
+	      pattern: 'cemetery_jewish'
+	    }, {
+	      pattern: 'cemetery'
+	    }],
+	    construction: 'construction',
+	    farmland: 'farmland',
+	    farmyard: 'farmyard',
+	    forest: [{
+	      leaf_type: 'broadleaved',
+	      pattern: 'forest_broadleaved'
+	    }, {
+	      leaf_type: 'needleleaved',
+	      pattern: 'forest_needleleaved'
+	    }, {
+	      leaf_type: 'leafless',
+	      pattern: 'forest_leafless'
+	    }, {
+	      pattern: 'forest'
+	    } // same as 'leaf_type:mixed'
+	    ],
+	    grave_yard: 'cemetery',
+	    grass: [{
+	      golf: 'green',
+	      pattern: 'golf_green'
+	    }, {
+	      pattern: 'grass'
+	    }],
+	    landfill: 'landfill',
+	    meadow: 'meadow',
+	    military: 'construction',
+	    orchard: 'orchard',
+	    quarry: 'quarry',
+	    vineyard: 'vineyard'
+	  },
+	  natural: {
+	    beach: 'beach',
+	    grassland: 'grass',
+	    sand: 'beach',
+	    scrub: 'scrub',
+	    water: [{
+	      water: 'pond',
+	      pattern: 'pond'
+	    }, {
+	      water: 'reservoir',
+	      pattern: 'water_standing'
+	    }, {
+	      pattern: 'waves'
+	    }],
+	    wetland: [{
+	      wetland: 'marsh',
+	      pattern: 'wetland_marsh'
+	    }, {
+	      wetland: 'swamp',
+	      pattern: 'wetland_swamp'
+	    }, {
+	      wetland: 'bog',
+	      pattern: 'wetland_bog'
+	    }, {
+	      wetland: 'reedbed',
+	      pattern: 'wetland_reedbed'
+	    }, {
+	      pattern: 'wetland'
+	    }],
+	    wood: [{
+	      leaf_type: 'broadleaved',
+	      pattern: 'forest_broadleaved'
+	    }, {
+	      leaf_type: 'needleleaved',
+	      pattern: 'forest_needleleaved'
+	    }, {
+	      leaf_type: 'leafless',
+	      pattern: 'forest_leafless'
+	    }, {
+	      pattern: 'forest'
+	    } // same as 'leaf_type:mixed'
+	    ]
+	  },
+	  traffic_calming: {
+	    island: [{
+	      surface: 'grass',
+	      pattern: 'grass'
+	    }],
+	    chicane: [{
+	      surface: 'grass',
+	      pattern: 'grass'
+	    }],
+	    choker: [{
+	      surface: 'grass',
+	      pattern: 'grass'
+	    }]
+	  }
+	};
+	function svgTagPattern(tags) {
+	  // Skip pattern filling if this is a building (buildings don't get patterns applied)
+	  if (tags.building && tags.building !== 'no') {
+	    return null;
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro', null);
-	            nextStep();
-	        }
-	    }
+	  for (var tag in patterns) {
+	    var entityValue = tags[tag];
+	    if (!entityValue) continue;
 
+	    if (typeof patterns[tag] === 'string') {
+	      // extra short syntax (just tag) - pattern name
+	      return 'pattern-' + patterns[tag];
+	    } else {
+	      var values = patterns[tag];
 
-	    function enterDelete() {
-	        if (!_pointID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_pointID);
-	        if (!entity) { return chapter.restart(); }
+	      for (var value in values) {
+	        if (entityValue !== value) continue;
+	        var rules = values[value];
 
-	        var node = selectMenuItem(context, 'delete').node();
-	        if (!node) { return continueTo(rightClickPoint); }
+	        if (typeof rules === 'string') {
+	          // short syntax - pattern name
+	          return 'pattern-' + rules;
+	        } // long syntax - rule array
 
-	        reveal('.edit-menu',
-	            helpString('intro.points.delete'),
-	            { padding: 50 }
-	        );
 
-	        timeout(function() {
-	            context.map().on('move.intro', function() {
-	                reveal('.edit-menu',
-	                    helpString('intro.points.delete'),
-	                    { duration: 0,  padding: 50 }
-	                );
-	            });
-	        }, 300); // after menu visible
+	        for (var ruleKey in rules) {
+	          var rule = rules[ruleKey];
+	          var pass = true;
 
-	        context.on('exit.intro', function() {
-	            if (!_pointID) { return chapter.restart(); }
-	            var entity = context.hasEntity(_pointID);
-	            if (entity) { return continueTo(rightClickPoint); }  // point still exists
-	        });
+	          for (var criterion in rule) {
+	            if (criterion !== 'pattern') {
+	              // reserved for pattern name
+	              // The only rule is a required tag-value pair
+	              var v = tags[criterion];
 
-	        context.history().on('change.intro', function(changed) {
-	            if (changed.deleted().length) {
-	                continueTo(undo);
+	              if (!v || v !== rule[criterion]) {
+	                pass = false;
+	                break;
+	              }
 	            }
-	        });
+	          }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
+	          if (pass) {
+	            return 'pattern-' + rule.pattern;
+	          }
 	        }
+	      }
 	    }
+	  }
 
+	  return null;
+	}
 
-	    function undo() {
-	        context.history().on('change.intro', function() {
-	            continueTo(play);
-	        });
-
-	        reveal('.top-toolbar button.undo-button',
-	            helpString('intro.points.undo')
-	        );
+	function svgAreas(projection, context) {
+	  function getPatternStyle(tags) {
+	    var imageID = svgTagPattern(tags);
 
-	        function continueTo(nextStep) {
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    if (imageID) {
+	      return 'url("#ideditor-' + imageID + '")';
 	    }
 
+	    return '';
+	  }
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.points.play', { next: _t('intro.areas.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-area',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
-	    }
-
+	  function drawTargets(selection, graph, entities, filter) {
+	    var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+	    var getPath = svgPath(projection).geojson;
+	    var activeID = context.activeID();
+	    var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways
 
-	    chapter.enter = function() {
-	        addPoint();
+	    var data = {
+	      targets: [],
+	      nopes: []
 	    };
+	    entities.forEach(function (way) {
+	      var features = svgSegmentWay(way, graph, activeID);
+	      data.targets.push.apply(data.targets, features.passive);
+	      data.nopes.push.apply(data.nopes, features.active);
+	    }); // Targets allow hover and vertex snapping
 
+	    var targetData = data.targets.filter(getPath);
+	    var targets = selection.selectAll('.area.target-allowed').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(targetData, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-	        context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	    };
+	    targets.exit().remove();
 
+	    var segmentWasEdited = function segmentWasEdited(d) {
+	      var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	      if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+	        return false;
+	      }
 
+	      return d.properties.nodes.some(function (n) {
+	        return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
+	      });
+	    }; // enter/update
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
 
-	function uiIntroArea(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var playground = [-85.63552, 41.94159];
-	    var playgroundPreset = _mainPresetIndex.item('leisure/playground');
-	    var nameField = _mainPresetIndex.field('name');
-	    var descriptionField = _mainPresetIndex.field('description');
-	    var timeouts = [];
-	    var _areaID;
+	    targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
+	      return 'way area target target-allowed ' + targetClass + d.id;
+	    }).classed('segment-edited', segmentWasEdited); // NOPE
 
+	    var nopeData = data.nopes.filter(getPath);
+	    var nopes = selection.selectAll('.area.target-nope').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(nopeData, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	    var chapter = {
-	        title: 'intro.areas.title'
-	    };
+	    nopes.exit().remove(); // enter/update
 
+	    nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
+	      return 'way area target target-nope ' + nopeClass + d.id;
+	    }).classed('segment-edited', segmentWasEdited);
+	  }
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
-	    }
+	  function drawAreas(selection, graph, entities, filter) {
+	    var path = svgPath(projection, graph, true);
+	    var areas = {};
+	    var multipolygon;
+	    var base = context.history().base();
 
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (entity.geometry(graph) !== 'area') continue;
+	      multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	      if (multipolygon) {
+	        areas[multipolygon.id] = {
+	          entity: multipolygon.mergeTags(entity.tags),
+	          area: Math.abs(entity.area(graph))
+	        };
+	      } else if (!areas[entity.id]) {
+	        areas[entity.id] = {
+	          entity: entity,
+	          area: Math.abs(entity.area(graph))
+	        };
+	      }
 	    }
 
-
-	    function revealPlayground(center, text, options) {
-	        var padding = 180 * Math.pow(2, context.map().zoom() - 19.5);
-	        var box = pad(center, padding, context);
-	        reveal(box, text, options);
+	    var fills = Object.values(areas).filter(function hasPath(a) {
+	      return path(a.entity);
+	    });
+	    fills.sort(function areaSort(a, b) {
+	      return b.area - a.area;
+	    });
+	    fills = fills.map(function (a) {
+	      return a.entity;
+	    });
+	    var strokes = fills.filter(function (area) {
+	      return area.type === 'way';
+	    });
+	    var data = {
+	      clip: fills,
+	      shadow: strokes,
+	      stroke: strokes,
+	      fill: fills
+	    };
+	    var clipPaths = context.surface().selectAll('defs').selectAll('.clipPath-osm').filter(filter).data(data.clip, osmEntity.key);
+	    clipPaths.exit().remove();
+	    var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-osm').attr('id', function (entity) {
+	      return 'ideditor-' + entity.id + '-clippath';
+	    });
+	    clipPathsEnter.append('path');
+	    clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', path);
+	    var drawLayer = selection.selectAll('.layer-osm.areas');
+	    var touchLayer = selection.selectAll('.layer-touch.areas'); // Draw areas..
+
+	    var areagroup = drawLayer.selectAll('g.areagroup').data(['fill', 'shadow', 'stroke']);
+	    areagroup = areagroup.enter().append('g').attr('class', function (d) {
+	      return 'areagroup area-' + d;
+	    }).merge(areagroup);
+	    var paths = areagroup.selectAll('path').filter(filter).data(function (layer) {
+	      return data[layer];
+	    }, osmEntity.key);
+	    paths.exit().remove();
+	    var fillpaths = selection.selectAll('.area-fill path.area').nodes();
+	    var bisect = d3_bisector(function (node) {
+	      return -node.__data__.area(graph);
+	    }).left;
+
+	    function sortedByArea(entity) {
+	      if (this._parent.__data__ === 'fill') {
+	        return fillpaths[bisect(fillpaths, -entity.area(graph))];
+	      }
 	    }
 
+	    paths = paths.enter().insert('path', sortedByArea).merge(paths).each(function (entity) {
+	      var layer = this.parentNode.__data__;
+	      this.setAttribute('class', entity.type + ' area ' + layer + ' ' + entity.id);
 
-	    function addArea() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
-	        _areaID = null;
-
-	        var msec = transitionTime(playground, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(playground, 19, msec);
-
-	        timeout(function() {
-	            var tooltip = reveal('button.add-area',
-	                helpString('intro.areas.add_playground'));
-
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-areas');
-
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-area') { return; }
-	                continueTo(startPlayground);
-	            });
-	        }, msec + 100);
+	      if (layer === 'fill') {
+	        this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
+	        this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
+	      }
+	    }).classed('added', function (d) {
+	      return !base.entities[d.id];
+	    }).classed('geometry-edited', function (d) {
+	      return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
+	    }).classed('retagged', function (d) {
+	      return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+	    }).call(svgTagClasses()).attr('d', path); // Draw touch targets..
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	    touchLayer.call(drawTargets, graph, data.stroke, filter);
+	  }
 
+	  return drawAreas;
+	}
 
-	    function startPlayground() {
-	        if (context.mode().id !== 'add-area') {
-	            return chapter.restart();
-	        }
+	//[4]   	NameStartChar	   ::=   	":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
+	//[4a]   	NameChar	   ::=   	NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
+	//[5]   	Name	   ::=   	NameStartChar (NameChar)*
+	var nameStartChar = /[A-Z_a-z\xC0-\xD6\xD8-\xF6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD]/; //\u10000-\uEFFFF
 
-	        _areaID = null;
-	        context.map().zoomEase(19.5, 500);
+	var nameChar = new RegExp("[\\-\\.0-9" + nameStartChar.source.slice(1, -1) + "\\u00B7\\u0300-\\u036F\\u203F-\\u2040]");
+	var tagNamePattern = new RegExp('^' + nameStartChar.source + nameChar.source + '*(?:\:' + nameStartChar.source + nameChar.source + '*)?$'); //var tagNamePattern = /^[a-zA-Z_][\w\-\.]*(?:\:[a-zA-Z_][\w\-\.]*)?$/
+	//var handlers = 'resolveEntity,getExternalSubset,characters,endDocument,endElement,endPrefixMapping,ignorableWhitespace,processingInstruction,setDocumentLocator,skippedEntity,startDocument,startElement,startPrefixMapping,notationDecl,unparsedEntityDecl,error,fatalError,warning,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,comment,endCDATA,endDTD,endEntity,startCDATA,startDTD,startEntity'.split(',')
+	//S_TAG,	S_ATTR,	S_EQ,	S_ATTR_NOQUOT_VALUE
+	//S_ATTR_SPACE,	S_ATTR_END,	S_TAG_SPACE, S_TAG_CLOSE
 
-	        timeout(function() {
-	            var textId = context.lastPointerType() === 'mouse' ? 'starting_node_click' : 'starting_node_tap';
-	            var startDrawString = helpString('intro.areas.start_playground') + helpString('intro.areas.' + textId);
-	            revealPlayground(playground,
-	                startDrawString, { duration: 250 }
-	            );
+	var S_TAG = 0; //tag name offerring
 
-	            timeout(function() {
-	                context.map().on('move.intro drawn.intro', function() {
-	                    revealPlayground(playground,
-	                        startDrawString, { duration: 0 }
-	                    );
-	                });
-	                context.on('enter.intro', function(mode) {
-	                    if (mode.id !== 'draw-area') { return chapter.restart(); }
-	                    continueTo(continuePlayground);
-	                });
-	            }, 250);  // after reveal
+	var S_ATTR = 1; //attr name offerring 
 
-	        }, 550);  // after easing
+	var S_ATTR_SPACE = 2; //attr name end and space offer
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	var S_EQ = 3; //=space?
 
+	var S_ATTR_NOQUOT_VALUE = 4; //attr value(no quot value only)
 
-	    function continuePlayground() {
-	        if (context.mode().id !== 'draw-area') {
-	            return chapter.restart();
-	        }
+	var S_ATTR_END = 5; //attr value end and no space(quot end)
 
-	        _areaID = null;
-	        revealPlayground(playground,
-	            helpString('intro.areas.continue_playground'),
-	            { duration: 250 }
-	        );
+	var S_TAG_SPACE = 6; //(attr value end || tag end ) && (space offer)
 
-	        timeout(function() {
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealPlayground(playground,
-	                    helpString('intro.areas.continue_playground'),
-	                    { duration: 0 }
-	                );
-	            });
-	        }, 250);  // after reveal
-
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-area') {
-	                var entity = context.hasEntity(context.selectedIDs()[0]);
-	                if (entity && entity.nodes.length >= 6) {
-	                    return continueTo(finishPlayground);
-	                } else {
-	                    return;
-	                }
-	            } else if (mode.id === 'select') {
-	                _areaID = context.selectedIDs()[0];
-	                return continueTo(searchPresets);
-	            } else {
-	                return chapter.restart();
-	            }
-	        });
+	var S_TAG_CLOSE = 7; //closed el<el />
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	function XMLReader() {}
 
+	XMLReader.prototype = {
+	  parse: function parse(source, defaultNSMap, entityMap) {
+	    var domBuilder = this.domBuilder;
+	    domBuilder.startDocument();
 
-	    function finishPlayground() {
-	        if (context.mode().id !== 'draw-area') {
-	            return chapter.restart();
-	        }
+	    _copy(defaultNSMap, defaultNSMap = {});
 
-	        _areaID = null;
+	    _parse(source, defaultNSMap, entityMap, domBuilder, this.errorHandler);
 
-	        var finishString = helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.areas.finish_playground');
-	        revealPlayground(playground,
-	            finishString, { duration: 250 }
-	        );
+	    domBuilder.endDocument();
+	  }
+	};
 
-	        timeout(function() {
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealPlayground(playground,
-	                    finishString, { duration: 0 }
-	                );
-	            });
-	        }, 250);  // after reveal
+	function _parse(source, defaultNSMapCopy, entityMap, domBuilder, errorHandler) {
+	  function fixedFromCharCode(code) {
+	    // String.prototype.fromCharCode does not supports
+	    // > 2 bytes unicode chars directly
+	    if (code > 0xffff) {
+	      code -= 0x10000;
+	      var surrogate1 = 0xd800 + (code >> 10),
+	          surrogate2 = 0xdc00 + (code & 0x3ff);
+	      return String.fromCharCode(surrogate1, surrogate2);
+	    } else {
+	      return String.fromCharCode(code);
+	    }
+	  }
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-area') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                _areaID = context.selectedIDs()[0];
-	                return continueTo(searchPresets);
-	            } else {
-	                return chapter.restart();
-	            }
-	        });
+	  function entityReplacer(a) {
+	    var k = a.slice(1, -1);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    if (k in entityMap) {
+	      return entityMap[k];
+	    } else if (k.charAt(0) === '#') {
+	      return fixedFromCharCode(parseInt(k.substr(1).replace('x', '0x')));
+	    } else {
+	      errorHandler.error('entity not found:' + a);
+	      return a;
 	    }
+	  }
 
+	  function appendText(end) {
+	    //has some bugs
+	    if (end > start) {
+	      var xt = source.substring(start, end).replace(/&#?\w+;/g, entityReplacer);
+	      locator && position(start);
+	      domBuilder.characters(xt, 0, end - start);
+	      start = end;
+	    }
+	  }
 
-	    function searchPresets() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            context.enter(modeSelect(context, [_areaID]));
-	        }
+	  function position(p, m) {
+	    while (p >= lineEnd && (m = linePattern.exec(source))) {
+	      lineStart = m.index;
+	      lineEnd = lineStart + m[0].length;
+	      locator.lineNumber++; //console.log('line++:',locator,startPos,endPos)
+	    }
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    locator.columnNumber = p - lineStart + 1;
+	  }
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	  var lineStart = 0;
+	  var lineEnd = 0;
+	  var linePattern = /.*(?:\r\n?|\n)|.*$/g;
+	  var locator = domBuilder.locator;
+	  var parseStack = [{
+	    currentNSMap: defaultNSMapCopy
+	  }];
+	  var closeMap = {};
+	  var start = 0;
 
-	            context.container().select('.preset-search-input')
-	                .on('keydown.intro', null)
-	                .on('keyup.intro', checkPresetSearch);
+	  while (true) {
+	    try {
+	      var tagStart = source.indexOf('<', start);
 
-	            reveal('.preset-search-input',
-	                helpString('intro.areas.search_playground', { preset: playgroundPreset.name() })
-	            );
-	        }, 400);  // after preset list pane visible..
+	      if (tagStart < 0) {
+	        if (!source.substr(start).match(/^\s*$/)) {
+	          var doc = domBuilder.doc;
+	          var text = doc.createTextNode(source.substr(start));
+	          doc.appendChild(text);
+	          domBuilder.currentElement = text;
+	        }
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_areaID || !context.hasEntity(_areaID)) {
-	                return continueTo(addArea);
-	            }
+	        return;
+	      }
 
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	                // keep the user's area selected..
-	                context.enter(modeSelect(context, [_areaID]));
+	      if (tagStart > start) {
+	        appendText(tagStart);
+	      }
 
-	                // reset pane, in case user somehow happened to change it..
-	                context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-	                // disallow scrolling
-	                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	      switch (source.charAt(tagStart + 1)) {
+	        case '/':
+	          var end = source.indexOf('>', tagStart + 3);
+	          var tagName = source.substring(tagStart + 2, end);
+	          var config = parseStack.pop();
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', null)
-	                    .on('keyup.intro', checkPresetSearch);
+	          if (end < 0) {
+	            tagName = source.substring(tagStart + 2).replace(/[\s<].*/, ''); //console.error('#@@@@@@'+tagName)
 
-	                reveal('.preset-search-input',
-	                    helpString('intro.areas.search_playground', { preset: playgroundPreset.name() })
-	                );
+	            errorHandler.error("end tag name: " + tagName + ' is not complete:' + config.tagName);
+	            end = tagStart + 1 + tagName.length;
+	          } else if (tagName.match(/\s</)) {
+	            tagName = tagName.replace(/[\s<].*/, '');
+	            errorHandler.error("end tag name: " + tagName + ' maybe not complete');
+	            end = tagStart + 1 + tagName.length;
+	          } //console.error(parseStack.length,parseStack)
+	          //console.error(config);
 
-	                context.history().on('change.intro', null);
-	            }
-	        });
 
-	        function checkPresetSearch() {
-	            var first = context.container().select('.preset-list-item:first-child');
+	          var localNSMap = config.localNSMap;
+	          var endMatch = config.tagName == tagName;
+	          var endIgnoreCaseMach = endMatch || config.tagName && config.tagName.toLowerCase() == tagName.toLowerCase();
 
-	            if (first.classed('preset-leisure-playground')) {
-	                reveal(first.select('.preset-list-button').node(),
-	                    helpString('intro.areas.choose_playground', { preset: playgroundPreset.name() }),
-	                    { duration: 300 }
-	                );
+	          if (endIgnoreCaseMach) {
+	            domBuilder.endElement(config.uri, config.localName, tagName);
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', eventCancel, true)
-	                    .on('keyup.intro', null);
+	            if (localNSMap) {
+	              for (var prefix in localNSMap) {
+	                domBuilder.endPrefixMapping(prefix);
+	              }
+	            }
 
-	                context.history().on('change.intro', function() {
-	                    continueTo(clickAddField);
-	                });
+	            if (!endMatch) {
+	              errorHandler.fatalError("end tag name: " + tagName + ' is not match the current start tagName:' + config.tagName);
 	            }
-	        }
+	          } else {
+	            parseStack.push(config);
+	          }
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	            nextStep();
-	        }
-	    }
+	          end++;
+	          break;
+	        // end elment
 
+	        case '?':
+	          // <?...?>
+	          locator && position(tagStart);
+	          end = parseInstruction(source, tagStart, domBuilder);
+	          break;
 
-	    function clickAddField() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
-	        }
+	        case '!':
+	          // <!doctype,<![CDATA,<!--
+	          locator && position(tagStart);
+	          end = parseDCC(source, tagStart, domBuilder, errorHandler);
+	          break;
 
-	        if (!context.container().select('.form-field-description').empty()) {
-	            return continueTo(describePlayground);
-	        }
+	        default:
+	          locator && position(tagStart);
+	          var el = new ElementAttributes();
+	          var currentNSMap = parseStack[parseStack.length - 1].currentNSMap; //elStartEnd
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	          var end = parseElementStartPart(source, tagStart, el, currentNSMap, entityReplacer, errorHandler);
+	          var len = el.length;
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	          if (!el.closed && fixSelfClosed(source, end, el.tagName, closeMap)) {
+	            el.closed = true;
 
-	            // It's possible for the user to add a description in a previous step..
-	            // If they did this already, just continue to next step.
-	            var entity = context.entity(_areaID);
-	            if (entity.tags.description) {
-	                return continueTo(play);
+	            if (!entityMap.nbsp) {
+	              errorHandler.warning('unclosed xml attribute');
 	            }
+	          }
 
-	            // scroll "Add field" into view
-	            var box = context.container().select('.more-fields').node().getBoundingClientRect();
-	            if (box.top > 300) {
-	                var pane = context.container().select('.entity-editor-pane .inspector-body');
-	                var start = pane.node().scrollTop;
-	                var end = start + (box.top - 300);
-
-	                pane
-	                    .transition()
-	                    .duration(250)
-	                    .tween('scroll.inspector', function() {
-	                        var node = this;
-	                        var i = d3_interpolateNumber(start, end);
-	                        return function(t) {
-	                            node.scrollTop = i(t);
-	                        };
-	                    });
+	          if (locator && len) {
+	            var locator2 = copyLocator(locator, {}); //try{//attribute position fixed
+
+	            for (var i = 0; i < len; i++) {
+	              var a = el[i];
+	              position(a.offset);
+	              a.locator = copyLocator(locator, {});
+	            } //}catch(e){console.error('@@@@@'+e)}
+
+
+	            domBuilder.locator = locator2;
+
+	            if (appendElement(el, domBuilder, currentNSMap)) {
+	              parseStack.push(el);
 	            }
 
-	            timeout(function() {
-	                reveal('.more-fields .combobox-input',
-	                    helpString('intro.areas.add_field', {
-	                        name: nameField.label(),
-	                        description: descriptionField.label()
-	                    }),
-	                    { duration: 300 }
-	                );
+	            domBuilder.locator = locator;
+	          } else {
+	            if (appendElement(el, domBuilder, currentNSMap)) {
+	              parseStack.push(el);
+	            }
+	          }
 
-	                context.container().select('.more-fields .combobox-input')
-	                    .on('click.intro', function() {
-	                        // Watch for the combobox to appear...
-	                        var watcher;
-	                        watcher = window.setInterval(function() {
-	                            if (!context.container().select('div.combobox').empty()) {
-	                                window.clearInterval(watcher);
-	                                continueTo(chooseDescriptionField);
-	                            }
-	                        }, 300);
-	                    });
-	            }, 300);  // after "Add Field" visible
+	          if (el.uri === 'http://www.w3.org/1999/xhtml' && !el.closed) {
+	            end = parseHtmlSpecialContent(source, end, el.tagName, entityReplacer, domBuilder);
+	          } else {
+	            end++;
+	          }
 
-	        }, 400);  // after editor pane visible
+	      }
+	    } catch (e) {
+	      errorHandler.error('element parse error: ' + e); //errorHandler.error('element parse error: '+e);
 
-	        context.on('exit.intro', function() {
-	            return continueTo(searchPresets);
-	        });
+	      end = -1; //throw e;
+	    }
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.more-fields .combobox-input').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    if (end > start) {
+	      start = end;
+	    } else {
+	      //TODO: 这里有可能sax回退，有位置错误风险
+	      appendText(Math.max(tagStart, start) + 1);
 	    }
+	  }
+	}
 
+	function copyLocator(f, t) {
+	  t.lineNumber = f.lineNumber;
+	  t.columnNumber = f.columnNumber;
+	  return t;
+	}
+	/**
+	 * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);
+	 * @return end of the elementStartPart(end of elementEndPart for selfClosed el)
+	 */
 
-	    function chooseDescriptionField() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
-	        }
 
-	        if (!context.container().select('.form-field-description').empty()) {
-	            return continueTo(describePlayground);
-	        }
+	function parseElementStartPart(source, start, el, currentNSMap, entityReplacer, errorHandler) {
+	  var attrName;
+	  var value;
+	  var p = ++start;
+	  var s = S_TAG; //status
 
-	        // Make sure combobox is ready..
-	        if (context.container().select('div.combobox').empty()) {
-	            return continueTo(clickAddField);
+	  while (true) {
+	    var c = source.charAt(p);
+
+	    switch (c) {
+	      case '=':
+	        if (s === S_ATTR) {
+	          //attrName
+	          attrName = source.slice(start, p);
+	          s = S_EQ;
+	        } else if (s === S_ATTR_SPACE) {
+	          s = S_EQ;
+	        } else {
+	          //fatalError: equal must after attrName or space after attrName
+	          throw new Error('attribute equal must after attrName');
 	        }
-	        // Watch for the combobox to go away..
-	        var watcher;
-	        watcher = window.setInterval(function() {
-	            if (context.container().select('div.combobox').empty()) {
-	                window.clearInterval(watcher);
-	                timeout(function() {
-	                    if (context.container().select('.form-field-description').empty()) {
-	                        continueTo(retryChooseDescription);
-	                    } else {
-	                        continueTo(describePlayground);
-	                    }
-	                }, 300);  // after description field added.
-	            }
-	        }, 300);
 
-	        reveal('div.combobox',
-	            helpString('intro.areas.choose_field', { field: descriptionField.label() }),
-	            { duration: 300 }
-	        );
-
-	        context.on('exit.intro', function() {
-	            return continueTo(searchPresets);
-	        });
+	        break;
 
-	        function continueTo(nextStep) {
-	            if (watcher) { window.clearInterval(watcher); }
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	      case '\'':
+	      case '"':
+	        if (s === S_EQ || s === S_ATTR //|| s == S_ATTR_SPACE
+	        ) {
+	            //equal
+	            if (s === S_ATTR) {
+	              errorHandler.warning('attribute value must after "="');
+	              attrName = source.slice(start, p);
+	            }
 
+	            start = p + 1;
+	            p = source.indexOf(c, start);
 
-	    function describePlayground() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
-	        }
+	            if (p > 0) {
+	              value = source.slice(start, p).replace(/&#?\w+;/g, entityReplacer);
+	              el.add(attrName, value, start - 1);
+	              s = S_ATTR_END;
+	            } else {
+	              //fatalError: no end quot match
+	              throw new Error('attribute value no end \'' + c + '\' match');
+	            }
+	          } else if (s == S_ATTR_NOQUOT_VALUE) {
+	          value = source.slice(start, p).replace(/&#?\w+;/g, entityReplacer); //console.log(attrName,value,start,p)
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	          el.add(attrName, value, start); //console.dir(el)
 
-	        if (context.container().select('.form-field-description').empty()) {
-	            return continueTo(retryChooseDescription);
+	          errorHandler.warning('attribute "' + attrName + '" missed start quot(' + c + ')!!');
+	          start = p + 1;
+	          s = S_ATTR_END;
+	        } else {
+	          //fatalError: no equal before
+	          throw new Error('attribute value must after "="');
 	        }
 
-	        context.on('exit.intro', function() {
-	            continueTo(play);
-	        });
+	        break;
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.areas.describe_playground', { button: icon('#iD-icon-close', 'pre-text') }),
-	            { duration: 300 }
-	        );
+	      case '/':
+	        switch (s) {
+	          case S_TAG:
+	            el.setTagName(source.slice(start, p));
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	          case S_ATTR_END:
+	          case S_TAG_SPACE:
+	          case S_TAG_CLOSE:
+	            s = S_TAG_CLOSE;
+	            el.closed = true;
 
+	          case S_ATTR_NOQUOT_VALUE:
+	          case S_ATTR:
+	          case S_ATTR_SPACE:
+	            break;
+	          //case S_EQ:
 
-	    function retryChooseDescription() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
+	          default:
+	            throw new Error("attribute invalid close char('/')");
 	        }
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-
-	        reveal('.entity-editor-pane',
-	            helpString('intro.areas.retry_add_field', { field: descriptionField.label() }), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(clickAddField); }
-	        });
+	        break;
 
-	        context.on('exit.intro', function() {
-	            return continueTo(searchPresets);
-	        });
+	      case '':
+	        //end document
+	        //throw new Error('unexpected end of input')
+	        errorHandler.error('unexpected end of input');
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
+	        if (s == S_TAG) {
+	          el.setTagName(source.slice(start, p));
 	        }
-	    }
-
-
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.areas.play', { next: _t('intro.lines.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-line',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
-	    }
 
+	        return p;
 
-	    chapter.enter = function() {
-	        addArea();
-	    };
+	      case '>':
+	        switch (s) {
+	          case S_TAG:
+	            el.setTagName(source.slice(start, p));
 
+	          case S_ATTR_END:
+	          case S_TAG_SPACE:
+	          case S_TAG_CLOSE:
+	            break;
+	          //normal
 
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', null);
-	        context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	        context.container().select('.more-fields .combobox-input').on('click.intro', null);
-	    };
+	          case S_ATTR_NOQUOT_VALUE: //Compatible state
 
+	          case S_ATTR:
+	            value = source.slice(start, p);
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	            if (value.slice(-1) === '/') {
+	              el.closed = true;
+	              value = value.slice(0, -1);
+	            }
 
+	          case S_ATTR_SPACE:
+	            if (s === S_ATTR_SPACE) {
+	              value = attrName;
+	            }
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	            if (s == S_ATTR_NOQUOT_VALUE) {
+	              errorHandler.warning('attribute "' + value + '" missed quot(")!!');
+	              el.add(attrName, value.replace(/&#?\w+;/g, entityReplacer), start);
+	            } else {
+	              if (currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !value.match(/^(?:disabled|checked|selected)$/i)) {
+	                errorHandler.warning('attribute "' + value + '" missed value!! "' + value + '" instead!!');
+	              }
 
-	function uiIntroLine(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var timeouts = [];
-	    var _tulipRoadID = null;
-	    var flowerRoadID = 'w646';
-	    var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
-	    var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
-	    var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
-	    var roadCategory = _mainPresetIndex.item('category-road_minor');
-	    var residentialPreset = _mainPresetIndex.item('highway/residential');
-	    var woodRoadID = 'w525';
-	    var woodRoadEndID = 'n2862';
-	    var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
-	    var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
-	    var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
-	    var washingtonStreetID = 'w522';
-	    var twelfthAvenueID = 'w1';
-	    var eleventhAvenueEndID = 'n3550';
-	    var twelfthAvenueEndID = 'n5';
-	    var _washingtonSegmentID = null;
-	    var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
-	    var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
-	    var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
-	    var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
-
-
-	    var chapter = {
-	        title: 'intro.lines.title'
-	    };
+	              el.add(value, value, start);
+	            }
 
+	            break;
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
-	    }
+	          case S_EQ:
+	            throw new Error('attribute value missed!!');
+	        } //			console.log(tagName,tagNamePattern,tagNamePattern.test(tagName))
 
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
-	    }
+	        return p;
 
+	      /*xml space '\x20' | #x9 | #xD | #xA; */
 
-	    function addLine() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
+	      case "\x80":
+	        c = ' ';
 
-	        var msec = transitionTime(tulipRoadStart, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
+	      default:
+	        if (c <= ' ') {
+	          //space
+	          switch (s) {
+	            case S_TAG:
+	              el.setTagName(source.slice(start, p)); //tagName
 
-	        timeout(function() {
-	            var tooltip = reveal('button.add-line',
-	                helpString('intro.lines.add_line'));
+	              s = S_TAG_SPACE;
+	              break;
 
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-lines');
+	            case S_ATTR:
+	              attrName = source.slice(start, p);
+	              s = S_ATTR_SPACE;
+	              break;
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-line') { return; }
-	                continueTo(startLine);
-	            });
-	        }, msec + 100);
+	            case S_ATTR_NOQUOT_VALUE:
+	              var value = source.slice(start, p).replace(/&#?\w+;/g, entityReplacer);
+	              errorHandler.warning('attribute "' + value + '" missed quot(")!!');
+	              el.add(attrName, value, start);
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	            case S_ATTR_END:
+	              s = S_TAG_SPACE;
+	              break;
+	            //case S_TAG_SPACE:
+	            //case S_EQ:
+	            //case S_ATTR_SPACE:
+	            //	void();break;
+	            //case S_TAG_CLOSE:
+	            //ignore warning
+	          }
+	        } else {
+	          //not space
+	          //S_TAG,	S_ATTR,	S_EQ,	S_ATTR_NOQUOT_VALUE
+	          //S_ATTR_SPACE,	S_ATTR_END,	S_TAG_SPACE, S_TAG_CLOSE
+	          switch (s) {
+	            //case S_TAG:void();break;
+	            //case S_ATTR:void();break;
+	            //case S_ATTR_NOQUOT_VALUE:void();break;
+	            case S_ATTR_SPACE:
+	              var tagName = el.tagName;
+
+	              if (currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !attrName.match(/^(?:disabled|checked|selected)$/i)) {
+	                errorHandler.warning('attribute "' + attrName + '" missed value!! "' + attrName + '" instead2!!');
+	              }
 
+	              el.add(attrName, attrName, start);
+	              start = p;
+	              s = S_ATTR;
+	              break;
 
-	    function startLine() {
-	        if (context.mode().id !== 'add-line') { return chapter.restart(); }
+	            case S_ATTR_END:
+	              errorHandler.warning('attribute space is required"' + attrName + '"!!');
 
-	        _tulipRoadID = null;
+	            case S_TAG_SPACE:
+	              s = S_ATTR;
+	              start = p;
+	              break;
 
-	        var padding = 70 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(tulipRoadStart, padding, context);
-	        box.height = box.height + 100;
+	            case S_EQ:
+	              s = S_ATTR_NOQUOT_VALUE;
+	              start = p;
+	              break;
 
-	        var textId = context.lastPointerType() === 'mouse' ? 'start_line' : 'start_line_tap';
-	        var startLineString = helpString('intro.lines.missing_road') + '{br}' +
-	            helpString('intro.lines.line_draw_info') +
-	            helpString('intro.lines.' + textId);
-	        reveal(box, startLineString);
+	            case S_TAG_CLOSE:
+	              throw new Error("elements closed character '/' and '>' must be connected to");
+	          }
+	        }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            padding = 70 * Math.pow(2, context.map().zoom() - 18);
-	            box = pad(tulipRoadStart, padding, context);
-	            box.height = box.height + 100;
-	            reveal(box, startLineString, { duration: 0 });
-	        });
+	    } //end outer switch
+	    //console.log('p++',p)
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'draw-line') { return chapter.restart(); }
-	            continueTo(drawLine);
-	        });
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	    p++;
+	  }
+	}
+	/**
+	 * @return true if has new namespace define
+	 */
 
 
-	    function drawLine() {
-	        if (context.mode().id !== 'draw-line') { return chapter.restart(); }
+	function appendElement(el, domBuilder, currentNSMap) {
+	  var tagName = el.tagName;
+	  var localNSMap = null; //var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
 
-	        _tulipRoadID = context.mode().selectedIDs()[0];
-	        context.map().centerEase(tulipRoadMidpoint, 500);
+	  var i = el.length;
 
-	        timeout(function() {
-	            var padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
-	            var box = pad(tulipRoadMidpoint, padding, context);
-	            box.height = box.height * 2;
-	            reveal(box,
-	                helpString('intro.lines.intersect', { name: _t('intro.graph.name.flower-street') })
-	            );
+	  while (i--) {
+	    var a = el[i];
+	    var qName = a.qName;
+	    var value = a.value;
+	    var nsp = qName.indexOf(':');
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
-	                box = pad(tulipRoadMidpoint, padding, context);
-	                box.height = box.height * 2;
-	                reveal(box,
-	                    helpString('intro.lines.intersect', { name: _t('intro.graph.name.flower-street') }),
-	                    { duration: 0 }
-	                );
-	            });
-	        }, 550);  // after easing..
+	    if (nsp > 0) {
+	      var prefix = a.prefix = qName.slice(0, nsp);
+	      var localName = qName.slice(nsp + 1);
+	      var nsPrefix = prefix === 'xmlns' && localName;
+	    } else {
+	      localName = qName;
+	      prefix = null;
+	      nsPrefix = qName === 'xmlns' && '';
+	    } //can not set prefix,because prefix !== ''
 
-	        context.history().on('change.intro', function() {
-	            if (isLineConnected()) {
-	                continueTo(continueLine);
-	            }
-	        });
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-line') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                continueTo(retryIntersect);
-	                return;
-	            } else {
-	                return chapter.restart();
-	            }
-	        });
+	    a.localName = localName; //prefix == null for no ns prefix attribute 
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	    if (nsPrefix !== false) {
+	      //hack!!
+	      if (localNSMap == null) {
+	        localNSMap = {}; //console.log(currentNSMap,0)
 
+	        _copy(currentNSMap, currentNSMap = {}); //console.log(currentNSMap,1)
 
-	    function isLineConnected() {
-	        var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
-	        if (!entity) { return false; }
+	      }
 
-	        var drawNodes = context.graph().childNodes(entity);
-	        return drawNodes.some(function(node) {
-	            return context.graph().parentWays(node).some(function(parent) {
-	                return parent.id === flowerRoadID;
-	            });
-	        });
+	      currentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;
+	      a.uri = 'http://www.w3.org/2000/xmlns/';
+	      domBuilder.startPrefixMapping(nsPrefix, value);
 	    }
+	  }
 
+	  var i = el.length;
 
-	    function retryIntersect() {
-	        select(window).on('pointerdown.intro mousedown.intro', eventCancel, true);
+	  while (i--) {
+	    a = el[i];
+	    var prefix = a.prefix;
 
-	        var box = pad(tulipRoadIntersection, 80, context);
-	        reveal(box,
-	            helpString('intro.lines.retry_intersect', { name: _t('intro.graph.name.flower-street') })
-	        );
+	    if (prefix) {
+	      //no prefix attribute has no namespace
+	      if (prefix === 'xml') {
+	        a.uri = 'http://www.w3.org/XML/1998/namespace';
+	      }
 
-	        timeout(chapter.restart, 3000);
+	      if (prefix !== 'xmlns') {
+	        a.uri = currentNSMap[prefix || '']; //{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}
+	      }
 	    }
+	  }
 
+	  var nsp = tagName.indexOf(':');
 
-	    function continueLine() {
-	        if (context.mode().id !== 'draw-line') { return chapter.restart(); }
-	        var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
-	        if (!entity) { return chapter.restart(); }
+	  if (nsp > 0) {
+	    prefix = el.prefix = tagName.slice(0, nsp);
+	    localName = el.localName = tagName.slice(nsp + 1);
+	  } else {
+	    prefix = null; //important!!
 
-	        context.map().centerEase(tulipRoadIntersection, 500);
+	    localName = el.localName = tagName;
+	  } //no prefix element has default namespace
 
-	        var continueLineText = helpString('intro.lines.continue_line') + '{br}' +
-	            helpString('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.lines.finish_road');
 
-	        reveal('.surface', continueLineText);
+	  var ns = el.uri = currentNSMap[prefix || ''];
+	  domBuilder.startElement(ns, localName, tagName, el); //endPrefixMapping and startPrefixMapping have not any help for dom builder
+	  //localNSMap = null
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-line')
-	                { return; }
-	            else if (mode.id === 'select')
-	                { return continueTo(chooseCategoryRoad); }
-	            else
-	                { return chapter.restart(); }
-	        });
+	  if (el.closed) {
+	    domBuilder.endElement(ns, localName, tagName);
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    if (localNSMap) {
+	      for (prefix in localNSMap) {
+	        domBuilder.endPrefixMapping(prefix);
+	      }
 	    }
+	  } else {
+	    el.currentNSMap = currentNSMap;
+	    el.localNSMap = localNSMap; //parseStack.push(el);
 
+	    return true;
+	  }
+	}
 
-	    function chooseCategoryRoad() {
-	        if (context.mode().id !== 'select') { return chapter.restart(); }
+	function parseHtmlSpecialContent(source, elStartEnd, tagName, entityReplacer, domBuilder) {
+	  if (/^(?:script|textarea)$/i.test(tagName)) {
+	    var elEndStart = source.indexOf('</' + tagName + '>', elStartEnd);
+	    var text = source.substring(elStartEnd + 1, elEndStart);
 
-	        context.on('exit.intro', function() {
-	            return chapter.restart();
-	        });
+	    if (/[&<]/.test(text)) {
+	      if (/^script$/i.test(tagName)) {
+	        //if(!/\]\]>/.test(text)){
+	        //lexHandler.startCDATA();
+	        domBuilder.characters(text, 0, text.length); //lexHandler.endCDATA();
 
-	        var button = context.container().select('.preset-category-road_minor .preset-list-button');
-	        if (button.empty()) { return chapter.restart(); }
+	        return elEndStart; //}
+	      } //}else{//text area
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      text = text.replace(/&#?\w+;/g, entityReplacer);
+	      domBuilder.characters(text, 0, text.length);
+	      return elEndStart; //}
+	    }
+	  }
 
-	            reveal(button.node(),
-	                helpString('intro.lines.choose_category_road', { category: roadCategory.name() })
-	            );
+	  return elStartEnd + 1;
+	}
 
-	            button.on('click.intro', function() {
-	                continueTo(choosePresetResidential);
-	            });
+	function fixSelfClosed(source, elStartEnd, tagName, closeMap) {
+	  //if(tagName in closeMap){
+	  var pos = closeMap[tagName];
 
-	        }, 400);  // after editor pane visible
+	  if (pos == null) {
+	    //console.log(tagName)
+	    pos = source.lastIndexOf('</' + tagName + '>');
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    if (pos < elStartEnd) {
+	      //忘记闭合
+	      pos = source.lastIndexOf('</' + tagName);
 	    }
 
+	    closeMap[tagName] = pos;
+	  }
 
-	    function choosePresetResidential() {
-	        if (context.mode().id !== 'select') { return chapter.restart(); }
+	  return pos < elStartEnd; //} 
+	}
 
-	        context.on('exit.intro', function() {
-	            return chapter.restart();
-	        });
+	function _copy(source, target) {
+	  for (var n in source) {
+	    target[n] = source[n];
+	  }
+	}
 
-	        var subgrid = context.container().select('.preset-category-road_minor .subgrid');
-	        if (subgrid.empty()) { return chapter.restart(); }
+	function parseDCC(source, start, domBuilder, errorHandler) {
+	  //sure start with '<!'
+	  var next = source.charAt(start + 2);
 
-	        subgrid.selectAll(':not(.preset-highway-residential) .preset-list-button')
-	            .on('click.intro', function() {
-	                continueTo(retryPresetResidential);
-	            });
+	  switch (next) {
+	    case '-':
+	      if (source.charAt(start + 3) === '-') {
+	        var end = source.indexOf('-->', start + 4); //append comment source.substring(4,end)//<!--
 
-	        subgrid.selectAll('.preset-highway-residential .preset-list-button')
-	            .on('click.intro', function() {
-	                continueTo(nameRoad);
-	            });
+	        if (end > start) {
+	          domBuilder.comment(source, start + 4, end - start - 4);
+	          return end + 3;
+	        } else {
+	          errorHandler.error("Unclosed comment");
+	          return -1;
+	        }
+	      } else {
+	        //error
+	        return -1;
+	      }
 
-	        timeout(function() {
-	            reveal(subgrid.node(),
-	                helpString('intro.lines.choose_preset_residential', { preset: residentialPreset.name() }),
-	                { tooltipBox: '.preset-highway-residential .preset-list-button', duration: 300 }
-	            );
-	        }, 300);
+	    default:
+	      if (source.substr(start + 3, 6) == 'CDATA[') {
+	        var end = source.indexOf(']]>', start + 9);
+	        domBuilder.startCDATA();
+	        domBuilder.characters(source, start + 9, end - start - 9);
+	        domBuilder.endCDATA();
+	        return end + 3;
+	      } //<!DOCTYPE
+	      //startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId) 
+
+
+	      var matchs = split$1(source, start);
+	      var len = matchs.length;
+
+	      if (len > 1 && /!doctype/i.test(matchs[0][0])) {
+	        var name = matchs[1][0];
+	        var pubid = len > 3 && /^public$/i.test(matchs[2][0]) && matchs[3][0];
+	        var sysid = len > 4 && matchs[4][0];
+	        var lastMatch = matchs[len - 1];
+	        domBuilder.startDTD(name, pubid && pubid.replace(/^(['"])(.*?)\1$/, '$2'), sysid && sysid.replace(/^(['"])(.*?)\1$/, '$2'));
+	        domBuilder.endDTD();
+	        return lastMatch.index + lastMatch[0].length;
+	      }
 
-	        function continueTo(nextStep) {
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	  }
 
+	  return -1;
+	}
 
-	    // selected wrong road type
-	    function retryPresetResidential() {
-	        if (context.mode().id !== 'select') { return chapter.restart(); }
+	function parseInstruction(source, start, domBuilder) {
+	  var end = source.indexOf('?>', start);
 
-	        context.on('exit.intro', function() {
-	            return chapter.restart();
-	        });
+	  if (end) {
+	    var match = source.substring(start, end).match(/^<\?(\S*)\s*([\s\S]*?)\s*$/);
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    if (match) {
+	      var len = match[0].length;
+	      domBuilder.processingInstruction(match[1], match[2]);
+	      return end + 2;
+	    } else {
+	      //error
+	      return -1;
+	    }
+	  }
 
-	        timeout(function() {
-	            var button = context.container().select('.entity-editor-pane .preset-list-button');
+	  return -1;
+	}
+	/**
+	 * @param source
+	 */
 
-	            reveal(button.node(),
-	                helpString('intro.lines.retry_preset_residential', { preset: residentialPreset.name() })
-	            );
 
-	            button.on('click.intro', function() {
-	                continueTo(chooseCategoryRoad);
-	            });
+	function ElementAttributes(source) {}
 
-	        }, 500);
+	ElementAttributes.prototype = {
+	  setTagName: function setTagName(tagName) {
+	    if (!tagNamePattern.test(tagName)) {
+	      throw new Error('invalid tagName:' + tagName);
+	    }
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    this.tagName = tagName;
+	  },
+	  add: function add(qName, value, offset) {
+	    if (!tagNamePattern.test(qName)) {
+	      throw new Error('invalid attribute:' + qName);
 	    }
 
+	    this[this.length++] = {
+	      qName: qName,
+	      value: value,
+	      offset: offset
+	    };
+	  },
+	  length: 0,
+	  getLocalName: function getLocalName(i) {
+	    return this[i].localName;
+	  },
+	  getLocator: function getLocator(i) {
+	    return this[i].locator;
+	  },
+	  getQName: function getQName(i) {
+	    return this[i].qName;
+	  },
+	  getURI: function getURI(i) {
+	    return this[i].uri;
+	  },
+	  getValue: function getValue(i) {
+	    return this[i].value;
+	  } //	,getIndex:function(uri, localName)){
+	  //		if(localName){
+	  //			
+	  //		}else{
+	  //			var qName = uri
+	  //		}
+	  //	},
+	  //	getValue:function(){return this.getValue(this.getIndex.apply(this,arguments))},
+	  //	getType:function(uri,localName){}
+	  //	getType:function(i){},
 
-	    function nameRoad() {
-	        context.on('exit.intro', function() {
-	            continueTo(didNameRoad);
-	        });
+	};
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.lines.name_road', { button: icon('#iD-icon-close', 'pre-text') }),
-	                { tooltipClass: 'intro-lines-name_road' }
-	            );
-	        }, 500);
+	function _set_proto_(thiz, parent) {
+	  thiz.__proto__ = parent;
+	  return thiz;
+	}
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	if (!(_set_proto_({}, _set_proto_.prototype) instanceof _set_proto_)) {
+	  _set_proto_ = function _set_proto_(thiz, parent) {
+	    function p() {}
+	    p.prototype = parent;
+	    p = new p();
 
+	    for (parent in thiz) {
+	      p[parent] = thiz[parent];
+	    }
 
-	    function didNameRoad() {
-	        context.history().checkpoint('doneAddLine');
+	    return p;
+	  };
+	}
 
-	        timeout(function() {
-	            reveal('.surface', helpString('intro.lines.did_name_road'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { continueTo(updateLine); }
-	            });
-	        }, 500);
+	function split$1(source, start) {
+	  var match;
+	  var buf = [];
+	  var reg = /'[^']+'|"[^"]+"|[^\s<>\/=]+=?|(\/?\s*>|<)/g;
+	  reg.lastIndex = start;
+	  reg.exec(source); //skip <
 
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
-	    }
+	  while (match = reg.exec(source)) {
+	    buf.push(match);
+	    if (match[1]) return buf;
+	  }
+	}
 
+	var XMLReader_1 = XMLReader;
+	var sax = {
+	  XMLReader: XMLReader_1
+	};
 
-	    function updateLine() {
-	        context.history().reset('doneAddLine');
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return chapter.restart();
-	        }
+	/*
+	 * DOM Level 2
+	 * Object DOMException
+	 * @see http://www.w3.org/TR/REC-DOM-Level-1/ecma-script-language-binding.html
+	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/ecma-script-binding.html
+	 */
+	function copy$1(src, dest) {
+	  for (var p in src) {
+	    dest[p] = src[p];
+	  }
+	}
+	/**
+	^\w+\.prototype\.([_\w]+)\s*=\s*((?:.*\{\s*?[\r\n][\s\S]*?^})|\S.*?(?=[;\r\n]));?
+	^\w+\.prototype\.([_\w]+)\s*=\s*(\S.*?(?=[;\r\n]));?
+	 */
 
-	        var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
 
-	        timeout(function() {
-	            var padding = 250 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragMidpoint, padding, context);
-	            var advance = function() { continueTo(addNode); };
+	function _extends(Class, Super) {
+	  var pt = Class.prototype;
 
-	            reveal(box, helpString('intro.lines.update_line'),
-	                { buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
+	  if (Object.create) {
+	    var ppt = Object.create(Super.prototype);
+	    pt.__proto__ = ppt;
+	  }
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                var padding = 250 * Math.pow(2, context.map().zoom() - 19);
-	                var box = pad(woodRoadDragMidpoint, padding, context);
-	                reveal(box, helpString('intro.lines.update_line'),
-	                    { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-	                );
-	            });
-	        }, msec + 100);
+	  if (!(pt instanceof Super)) {
+	    var t = function t() {};
+	    t.prototype = Super.prototype;
+	    t = new t();
+	    copy$1(pt, t);
+	    Class.prototype = pt = t;
+	  }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	  if (pt.constructor != Class) {
+	    if (typeof Class != 'function') {
+	      console.error("unknow Class:" + Class);
 	    }
 
+	    pt.constructor = Class;
+	  }
+	}
 
-	    function addNode() {
-	        context.history().reset('doneAddLine');
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return chapter.restart();
-	        }
+	var htmlns = 'http://www.w3.org/1999/xhtml'; // Node Types
 
-	        var padding = 40 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadAddNode, padding, context);
-	        var addNodeString = helpString('intro.lines.add_node' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
-	        reveal(box, addNodeString);
+	var NodeType = {};
+	var ELEMENT_NODE = NodeType.ELEMENT_NODE = 1;
+	var ATTRIBUTE_NODE = NodeType.ATTRIBUTE_NODE = 2;
+	var TEXT_NODE = NodeType.TEXT_NODE = 3;
+	var CDATA_SECTION_NODE = NodeType.CDATA_SECTION_NODE = 4;
+	var ENTITY_REFERENCE_NODE = NodeType.ENTITY_REFERENCE_NODE = 5;
+	var ENTITY_NODE = NodeType.ENTITY_NODE = 6;
+	var PROCESSING_INSTRUCTION_NODE = NodeType.PROCESSING_INSTRUCTION_NODE = 7;
+	var COMMENT_NODE = NodeType.COMMENT_NODE = 8;
+	var DOCUMENT_NODE = NodeType.DOCUMENT_NODE = 9;
+	var DOCUMENT_TYPE_NODE = NodeType.DOCUMENT_TYPE_NODE = 10;
+	var DOCUMENT_FRAGMENT_NODE = NodeType.DOCUMENT_FRAGMENT_NODE = 11;
+	var NOTATION_NODE = NodeType.NOTATION_NODE = 12; // ExceptionCode
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var padding = 40 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadAddNode, padding, context);
-	            reveal(box, addNodeString, { duration: 0 });
-	        });
+	var ExceptionCode = {};
+	var ExceptionMessage = {};
+	var INDEX_SIZE_ERR = ExceptionCode.INDEX_SIZE_ERR = (ExceptionMessage[1] = "Index size error", 1);
+	var DOMSTRING_SIZE_ERR = ExceptionCode.DOMSTRING_SIZE_ERR = (ExceptionMessage[2] = "DOMString size error", 2);
+	var HIERARCHY_REQUEST_ERR = ExceptionCode.HIERARCHY_REQUEST_ERR = (ExceptionMessage[3] = "Hierarchy request error", 3);
+	var WRONG_DOCUMENT_ERR = ExceptionCode.WRONG_DOCUMENT_ERR = (ExceptionMessage[4] = "Wrong document", 4);
+	var INVALID_CHARACTER_ERR = ExceptionCode.INVALID_CHARACTER_ERR = (ExceptionMessage[5] = "Invalid character", 5);
+	var NO_DATA_ALLOWED_ERR = ExceptionCode.NO_DATA_ALLOWED_ERR = (ExceptionMessage[6] = "No data allowed", 6);
+	var NO_MODIFICATION_ALLOWED_ERR = ExceptionCode.NO_MODIFICATION_ALLOWED_ERR = (ExceptionMessage[7] = "No modification allowed", 7);
+	var NOT_FOUND_ERR = ExceptionCode.NOT_FOUND_ERR = (ExceptionMessage[8] = "Not found", 8);
+	var NOT_SUPPORTED_ERR = ExceptionCode.NOT_SUPPORTED_ERR = (ExceptionMessage[9] = "Not supported", 9);
+	var INUSE_ATTRIBUTE_ERR = ExceptionCode.INUSE_ATTRIBUTE_ERR = (ExceptionMessage[10] = "Attribute in use", 10); //level2
+
+	var INVALID_STATE_ERR = ExceptionCode.INVALID_STATE_ERR = (ExceptionMessage[11] = "Invalid state", 11);
+	var SYNTAX_ERR = ExceptionCode.SYNTAX_ERR = (ExceptionMessage[12] = "Syntax error", 12);
+	var INVALID_MODIFICATION_ERR = ExceptionCode.INVALID_MODIFICATION_ERR = (ExceptionMessage[13] = "Invalid modification", 13);
+	var NAMESPACE_ERR = ExceptionCode.NAMESPACE_ERR = (ExceptionMessage[14] = "Invalid namespace", 14);
+	var INVALID_ACCESS_ERR = ExceptionCode.INVALID_ACCESS_ERR = (ExceptionMessage[15] = "Invalid access", 15);
 
-	        context.history().on('change.intro', function(changed) {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            if (changed.created().length === 1) {
-	                timeout(function() { continueTo(startDragEndpoint); }, 500);
-	            }
-	        });
+	function DOMException$2(code, message) {
+	  if (message instanceof Error) {
+	    var error = message;
+	  } else {
+	    error = this;
+	    Error.call(this, ExceptionMessage[code]);
+	    this.message = ExceptionMessage[code];
+	    if (Error.captureStackTrace) Error.captureStackTrace(this, DOMException$2);
+	  }
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') {
-	                continueTo(updateLine);
-	            }
-	        });
+	  error.code = code;
+	  if (message) this.message = this.message + ": " + message;
+	  return error;
+	}
+	DOMException$2.prototype = Error.prototype;
+	copy$1(ExceptionCode, DOMException$2);
+	/**
+	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-536297177
+	 * The NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. NodeList objects in the DOM are live.
+	 * The items in the NodeList are accessible via an integral index, starting from 0.
+	 */
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	function NodeList() {}
+	NodeList.prototype = {
+	  /**
+	   * The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.
+	   * @standard level1
+	   */
+	  length: 0,
+
+	  /**
+	   * Returns the indexth item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.
+	   * @standard level1
+	   * @param index  unsigned long 
+	   *   Index into the collection.
+	   * @return Node
+	   * 	The node at the indexth position in the NodeList, or null if that is not a valid index. 
+	   */
+	  item: function item(index) {
+	    return this[index] || null;
+	  },
+	  toString: function toString(isHTML, nodeFilter) {
+	    for (var buf = [], i = 0; i < this.length; i++) {
+	      serializeToString(this[i], buf, isHTML, nodeFilter);
 	    }
 
+	    return buf.join('');
+	  }
+	};
 
-	    function startDragEndpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
-	        var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragEndpoint, padding, context);
-	        var startDragString = helpString('intro.lines.start_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch')) +
-	            helpString('intro.lines.drag_to_intersection');
-	        reveal(box, startDragString);
+	function LiveNodeList(node, refresh) {
+	  this._node = node;
+	  this._refresh = refresh;
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragEndpoint, padding, context);
-	            reveal(box, startDragString, { duration: 0 });
+	  _updateLiveList(this);
+	}
 
-	            var entity = context.entity(woodRoadEndID);
-	            if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
-	                continueTo(finishDragEndpoint);
-	            }
-	        });
+	function _updateLiveList(list) {
+	  var inc = list._node._inc || list._node.ownerDocument._inc;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	  if (list._inc != inc) {
+	    var ls = list._refresh(list._node); //console.log(ls.length)
 
 
-	    function finishDragEndpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
+	    __set__(list, 'length', ls.length);
 
-	        var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragEndpoint, padding, context);
-	        var finishDragString = helpString('intro.lines.spot_looks_good') +
-	            helpString('intro.lines.finish_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
-	        reveal(box, finishDragString);
+	    copy$1(ls, list);
+	    list._inc = inc;
+	  }
+	}
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragEndpoint, padding, context);
-	            reveal(box, finishDragString, { duration: 0 });
+	LiveNodeList.prototype.item = function (i) {
+	  _updateLiveList(this);
 
-	            var entity = context.entity(woodRoadEndID);
-	            if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
-	                continueTo(startDragEndpoint);
-	            }
-	        });
+	  return this[i];
+	};
 
-	        context.on('enter.intro', function() {
-	            continueTo(startDragMidpoint);
-	        });
+	_extends(LiveNodeList, NodeList);
+	/**
+	 * 
+	 * Objects implementing the NamedNodeMap interface are used to represent collections of nodes that can be accessed by name. Note that NamedNodeMap does not inherit from NodeList; NamedNodeMaps are not maintained in any particular order. Objects contained in an object implementing NamedNodeMap may also be accessed by an ordinal index, but this is simply to allow convenient enumeration of the contents of a NamedNodeMap, and does not imply that the DOM specifies an order to these Nodes.
+	 * NamedNodeMap objects in the DOM are live.
+	 * used for attributes or DocumentType entities 
+	 */
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
 
+	function NamedNodeMap() {}
 
-	    function startDragMidpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
-	        if (context.selectedIDs().indexOf(woodRoadID) === -1) {
-	            context.enter(modeSelect(context, [woodRoadID]));
-	        }
+	function _findNodeIndex(list, node) {
+	  var i = list.length;
 
-	        var padding = 80 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragMidpoint, padding, context);
-	        reveal(box, helpString('intro.lines.start_drag_midpoint'));
+	  while (i--) {
+	    if (list[i] === node) {
+	      return i;
+	    }
+	  }
+	}
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            var padding = 80 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragMidpoint, padding, context);
-	            reveal(box, helpString('intro.lines.start_drag_midpoint'), { duration: 0 });
-	        });
+	function _addNamedNode(el, list, newAttr, oldAttr) {
+	  if (oldAttr) {
+	    list[_findNodeIndex(list, oldAttr)] = newAttr;
+	  } else {
+	    list[list.length++] = newAttr;
+	  }
 
-	        context.history().on('change.intro', function(changed) {
-	            if (changed.created().length === 1) {
-	                continueTo(continueDragMidpoint);
-	            }
-	        });
+	  if (el) {
+	    newAttr.ownerElement = el;
+	    var doc = el.ownerDocument;
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') {
-	                // keep Wood Road selected so midpoint triangles are drawn..
-	                context.enter(modeSelect(context, [woodRoadID]));
-	            }
-	        });
+	    if (doc) {
+	      oldAttr && _onRemoveAttribute(doc, el, oldAttr);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	      _onAddAttribute(doc, el, newAttr);
 	    }
+	  }
+	}
 
+	function _removeNamedNode(el, list, attr) {
+	  //console.log('remove attr:'+attr)
+	  var i = _findNodeIndex(list, attr);
 
-	    function continueDragMidpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
+	  if (i >= 0) {
+	    var lastIndex = list.length - 1;
 
-	        var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragEndpoint, padding, context);
-	        box.height += 400;
+	    while (i < lastIndex) {
+	      list[i] = list[++i];
+	    }
 
-	        var advance = function() {
-	            context.history().checkpoint('doneUpdateLine');
-	            continueTo(deleteLines);
-	        };
+	    list.length = lastIndex;
 
-	        reveal(box, helpString('intro.lines.continue_drag_midpoint'),
-	            { buttonText: _t('intro.ok'), buttonCallback: advance }
-	        );
+	    if (el) {
+	      var doc = el.ownerDocument;
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	                return continueTo(updateLine);
-	            }
-	            var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragEndpoint, padding, context);
-	            box.height += 400;
-	            reveal(box, helpString('intro.lines.continue_drag_midpoint'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
-	        });
+	      if (doc) {
+	        _onRemoveAttribute(doc, el, attr);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	        attr.ownerElement = null;
+	      }
 	    }
+	  } else {
+	    throw DOMException$2(NOT_FOUND_ERR, new Error(el.tagName + '@' + attr));
+	  }
+	}
 
+	NamedNodeMap.prototype = {
+	  length: 0,
+	  item: NodeList.prototype.item,
+	  getNamedItem: function getNamedItem(key) {
+	    //		if(key.indexOf(':')>0 || key == 'xmlns'){
+	    //			return null;
+	    //		}
+	    //console.log()
+	    var i = this.length;
 
-	    function deleteLines() {
-	        context.history().reset('doneUpdateLine');
-	        context.enter(modeBrowse(context));
-
-	        if (!context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return chapter.restart();
-	        }
-
-	        var msec = transitionTime(deleteLinesLoc, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(deleteLinesLoc, 18, msec);
-
-	        timeout(function() {
-	            var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(deleteLinesLoc, padding, context);
-	            box.top -= 200;
-	            box.height += 400;
-	            var advance = function() { continueTo(rightClickIntersection); };
-
-	            reveal(box, helpString('intro.lines.delete_lines', { street: _t('intro.graph.name.12th-avenue') }),
-	                { buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
-
-	            context.map().on('move.intro drawn.intro', function() {
-	                var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	                var box = pad(deleteLinesLoc, padding, context);
-	                box.top -= 200;
-	                box.height += 400;
-	                reveal(box, helpString('intro.lines.delete_lines', { street: _t('intro.graph.name.12th-avenue') }),
-	                    { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-	                );
-	            });
-
-	            context.history().on('change.intro', function() {
-	                timeout(function() {
-	                    continueTo(deleteLines);
-	                }, 500);  // after any transition (e.g. if user deleted intersection)
-	            });
+	    while (i--) {
+	      var attr = this[i]; //console.log(attr.nodeName,key)
 
-	        }, msec + 100);
+	      if (attr.nodeName == key) {
+	        return attr;
+	      }
+	    }
+	  },
+	  setNamedItem: function setNamedItem(attr) {
+	    var el = attr.ownerElement;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    if (el && el != this._ownerElement) {
+	      throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
 	    }
 
+	    var oldAttr = this.getNamedItem(attr.nodeName);
 
-	    function rightClickIntersection() {
-	        context.history().reset('doneUpdateLine');
-	        context.enter(modeBrowse(context));
+	    _addNamedNode(this._ownerElement, this, attr, oldAttr);
 
-	        context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
+	    return oldAttr;
+	  },
 
-	        var rightClickString = helpString('intro.lines.split_street', {
-	                street1: _t('intro.graph.name.11th-avenue'),
-	                street2: _t('intro.graph.name.washington-street')
-	            }) +
-	            helpString('intro.lines.' + (context.lastPointerType() === 'mouse' ? 'rightclick_intersection' : 'edit_menu_intersection_touch'));
+	  /* returns Node */
+	  setNamedItemNS: function setNamedItemNS(attr) {
+	    // raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR
+	    var el = attr.ownerElement,
+	        oldAttr;
 
-	        timeout(function() {
-	            var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(eleventhAvenueEnd, padding, context);
-	            reveal(box, rightClickString);
+	    if (el && el != this._ownerElement) {
+	      throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
+	    }
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	                var box = pad(eleventhAvenueEnd, padding, context);
-	                reveal(box, rightClickString,
-	                    { duration: 0 }
-	                );
-	            });
+	    oldAttr = this.getNamedItemNS(attr.namespaceURI, attr.localName);
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'select') { return; }
-	                var ids = context.selectedIDs();
-	                if (ids.length !== 1 || ids[0] !== eleventhAvenueEndID) { return; }
+	    _addNamedNode(this._ownerElement, this, attr, oldAttr);
 
-	                timeout(function() {
-	                    var node = selectMenuItem(context, 'split').node();
-	                    if (!node) { return; }
-	                    continueTo(splitIntersection);
-	                }, 50);  // after menu visible
-	            });
+	    return oldAttr;
+	  },
 
-	            context.history().on('change.intro', function() {
-	                timeout(function() {
-	                    continueTo(deleteLines);
-	                }, 300);  // after any transition (e.g. if user deleted intersection)
-	            });
+	  /* returns Node */
+	  removeNamedItem: function removeNamedItem(key) {
+	    var attr = this.getNamedItem(key);
 
-	        }, 600);
+	    _removeNamedNode(this._ownerElement, this, attr);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	    return attr;
+	  },
+	  // raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR
+	  //for level2
+	  removeNamedItemNS: function removeNamedItemNS(namespaceURI, localName) {
+	    var attr = this.getNamedItemNS(namespaceURI, localName);
 
+	    _removeNamedNode(this._ownerElement, this, attr);
 
-	    function splitIntersection() {
-	        if (!context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(deleteLines);
-	        }
+	    return attr;
+	  },
+	  getNamedItemNS: function getNamedItemNS(namespaceURI, localName) {
+	    var i = this.length;
 
-	        var node = selectMenuItem(context, 'split').node();
-	        if (!node) { return continueTo(rightClickIntersection); }
+	    while (i--) {
+	      var node = this[i];
 
-	        var wasChanged = false;
-	        _washingtonSegmentID = null;
+	      if (node.localName == localName && node.namespaceURI == namespaceURI) {
+	        return node;
+	      }
+	    }
 
-	        reveal('.edit-menu', helpString('intro.lines.split_intersection',
-	            { street: _t('intro.graph.name.washington-street') }),
-	            { padding: 50 }
-	        );
+	    return null;
+	  }
+	};
+	/**
+	 * @see http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490
+	 */
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var node = selectMenuItem(context, 'split').node();
-	            if (!wasChanged && !node) { return continueTo(rightClickIntersection); }
+	function DOMImplementation(
+	/* Object */
+	features) {
+	  this._features = {};
 
-	            reveal('.edit-menu', helpString('intro.lines.split_intersection',
-	                { street: _t('intro.graph.name.washington-street') }),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	  if (features) {
+	    for (var feature in features) {
+	      this._features = features[feature];
+	    }
+	  }
+	}
+	DOMImplementation.prototype = {
+	  hasFeature: function hasFeature(
+	  /* string */
+	  feature,
+	  /* string */
+	  version) {
+	    var versions = this._features[feature.toLowerCase()];
+
+	    if (versions && (!version || version in versions)) {
+	      return true;
+	    } else {
+	      return false;
+	    }
+	  },
+	  // Introduced in DOM Level 2:
+	  createDocument: function createDocument(namespaceURI, qualifiedName, doctype) {
+	    // raises:INVALID_CHARACTER_ERR,NAMESPACE_ERR,WRONG_DOCUMENT_ERR
+	    var doc = new Document();
+	    doc.implementation = this;
+	    doc.childNodes = new NodeList();
+	    doc.doctype = doctype;
 
-	        context.history().on('change.intro', function(changed) {
-	            wasChanged = true;
-	            timeout(function() {
-	                if (context.history().undoAnnotation() === _t('operations.split.annotation.line')) {
-	                    _washingtonSegmentID = changed.created()[0].id;
-	                    continueTo(didSplit);
-	                } else {
-	                    _washingtonSegmentID = null;
-	                    continueTo(retrySplit);
-	                }
-	            }, 300);  // after any transition (e.g. if user deleted intersection)
-	        });
+	    if (doctype) {
+	      doc.appendChild(doctype);
+	    }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    if (qualifiedName) {
+	      var root = doc.createElementNS(namespaceURI, qualifiedName);
+	      doc.appendChild(root);
 	    }
 
+	    return doc;
+	  },
+	  // Introduced in DOM Level 2:
+	  createDocumentType: function createDocumentType(qualifiedName, publicId, systemId) {
+	    // raises:INVALID_CHARACTER_ERR,NAMESPACE_ERR
+	    var node = new DocumentType();
+	    node.name = qualifiedName;
+	    node.nodeName = qualifiedName;
+	    node.publicId = publicId;
+	    node.systemId = systemId; // Introduced in DOM Level 2:
+	    //readonly attribute DOMString        internalSubset;
+	    //TODO:..
+	    //  readonly attribute NamedNodeMap     entities;
+	    //  readonly attribute NamedNodeMap     notations;
 
-	    function retrySplit() {
-	        context.enter(modeBrowse(context));
-	        context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
-	        var advance = function() { continueTo(rightClickIntersection); };
+	    return node;
+	  }
+	};
+	/**
+	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
+	 */
 
-	        var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(eleventhAvenueEnd, padding, context);
-	        reveal(box, helpString('intro.lines.retry_split'),
-	            { buttonText: _t('intro.ok'), buttonCallback: advance }
-	        );
+	function Node() {}
+	Node.prototype = {
+	  firstChild: null,
+	  lastChild: null,
+	  previousSibling: null,
+	  nextSibling: null,
+	  attributes: null,
+	  parentNode: null,
+	  childNodes: null,
+	  ownerDocument: null,
+	  nodeValue: null,
+	  namespaceURI: null,
+	  prefix: null,
+	  localName: null,
+	  // Modified in DOM Level 2:
+	  insertBefore: function insertBefore(newChild, refChild) {
+	    //raises 
+	    return _insertBefore(this, newChild, refChild);
+	  },
+	  replaceChild: function replaceChild(newChild, oldChild) {
+	    //raises 
+	    this.insertBefore(newChild, oldChild);
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(eleventhAvenueEnd, padding, context);
-	            reveal(box, helpString('intro.lines.retry_split'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
-	        });
+	    if (oldChild) {
+	      this.removeChild(oldChild);
+	    }
+	  },
+	  removeChild: function removeChild(oldChild) {
+	    return _removeChild(this, oldChild);
+	  },
+	  appendChild: function appendChild(newChild) {
+	    return this.insertBefore(newChild, null);
+	  },
+	  hasChildNodes: function hasChildNodes() {
+	    return this.firstChild != null;
+	  },
+	  cloneNode: function cloneNode(deep) {
+	    return _cloneNode(this.ownerDocument || this, this, deep);
+	  },
+	  // Modified in DOM Level 2:
+	  normalize: function normalize() {
+	    var child = this.firstChild;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	    while (child) {
+	      var next = child.nextSibling;
+
+	      if (next && next.nodeType == TEXT_NODE && child.nodeType == TEXT_NODE) {
+	        this.removeChild(next);
+	        child.appendData(next.data);
+	      } else {
+	        child.normalize();
+	        child = next;
+	      }
 	    }
+	  },
+	  // Introduced in DOM Level 2:
+	  isSupported: function isSupported(feature, version) {
+	    return this.ownerDocument.implementation.hasFeature(feature, version);
+	  },
+	  // Introduced in DOM Level 2:
+	  hasAttributes: function hasAttributes() {
+	    return this.attributes.length > 0;
+	  },
+	  lookupPrefix: function lookupPrefix(namespaceURI) {
+	    var el = this;
 
+	    while (el) {
+	      var map = el._nsMap; //console.dir(map)
 
-	    function didSplit() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
+	      if (map) {
+	        for (var n in map) {
+	          if (map[n] == namespaceURI) {
+	            return n;
+	          }
 	        }
+	      }
 
-	        var ids = context.selectedIDs();
-	        var string = 'intro.lines.did_split_' + (ids.length > 1 ? 'multi' : 'single');
-	        var street = _t('intro.graph.name.washington-street');
+	      el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
+	    }
 
-	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(twelfthAvenue, padding, context);
-	        box.width = box.width / 2;
-	        reveal(box, helpString(string, { street1: street, street2: street }),
-	            { duration: 500 }
-	        );
+	    return null;
+	  },
+	  // Introduced in DOM Level 3:
+	  lookupNamespaceURI: function lookupNamespaceURI(prefix) {
+	    var el = this;
 
-	        timeout(function() {
-	            context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	    while (el) {
+	      var map = el._nsMap; //console.dir(map)
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	                var box = pad(twelfthAvenue, padding, context);
-	                box.width = box.width / 2;
-	                reveal(box, helpString(string, { street1: street, street2: street }),
-	                    { duration: 0 }
-	                );
-	            });
-	        }, 600);  // after initial reveal and curtain cut
+	      if (map) {
+	        if (prefix in map) {
+	          return map[prefix];
+	        }
+	      }
 
-	        context.on('enter.intro', function() {
-	            var ids = context.selectedIDs();
-	            if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
-	                continueTo(multiSelect);
-	            }
-	        });
+	      el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
+	    }
 
-	        context.history().on('change.intro', function() {
-	            if (!_washingtonSegmentID ||
-	                !context.hasEntity(_washingtonSegmentID) ||
-	                !context.hasEntity(washingtonStreetID) ||
-	                !context.hasEntity(twelfthAvenueID) ||
-	                !context.hasEntity(eleventhAvenueEndID)) {
-	                return continueTo(rightClickIntersection);
-	            }
-	        });
+	    return null;
+	  },
+	  // Introduced in DOM Level 3:
+	  isDefaultNamespace: function isDefaultNamespace(namespaceURI) {
+	    var prefix = this.lookupPrefix(namespaceURI);
+	    return prefix == null;
+	  }
+	};
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	function _xmlEncoder(c) {
+	  return c == '<' && '&lt;' || c == '>' && '&gt;' || c == '&' && '&amp;' || c == '"' && '&quot;' || '&#' + c.charCodeAt() + ';';
+	}
 
+	copy$1(NodeType, Node);
+	copy$1(NodeType, Node.prototype);
+	/**
+	 * @param callback return true for continue,false for break
+	 * @return boolean true: break visit;
+	 */
 
-	    function multiSelect() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
+	function _visitNode(node, callback) {
+	  if (callback(node)) {
+	    return true;
+	  }
 
-	        var ids = context.selectedIDs();
-	        var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
-	        var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
+	  if (node = node.firstChild) {
+	    do {
+	      if (_visitNode(node, callback)) {
+	        return true;
+	      }
+	    } while (node = node.nextSibling);
+	  }
+	}
 
-	        if (hasWashington && hasTwelfth) {
-	            return continueTo(multiRightClick);
-	        } else if (!hasWashington && !hasTwelfth) {
-	            return continueTo(didSplit);
-	        }
+	function Document() {}
 
-	        context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	function _onAddAttribute(doc, el, newAttr) {
+	  doc && doc._inc++;
+	  var ns = newAttr.namespaceURI;
 
-	        timeout(function() {
-	            var selected, other, padding, box;
-	            if (hasWashington) {
-	                selected = _t('intro.graph.name.washington-street');
-	                other = _t('intro.graph.name.12th-avenue');
-	                padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	                box = pad(twelfthAvenueEnd, padding, context);
-	                box.width *= 3;
-	            } else {
-	                selected = _t('intro.graph.name.12th-avenue');
-	                other = _t('intro.graph.name.washington-street');
-	                padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	                box = pad(twelfthAvenue, padding, context);
-	                box.width /= 2;
-	            }
+	  if (ns == 'http://www.w3.org/2000/xmlns/') {
+	    //update namespace
+	    el._nsMap[newAttr.prefix ? newAttr.localName : ''] = newAttr.value;
+	  }
+	}
 
-	            reveal(box,
-	                helpString('intro.lines.multi_select',
-	                    { selected: selected, other1: other }) + ' ' +
-	                helpString('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'),
-	                    { selected: selected, other2: other })
-	            );
-
-	            context.map().on('move.intro drawn.intro', function() {
-	                if (hasWashington) {
-	                    selected = _t('intro.graph.name.washington-street');
-	                    other = _t('intro.graph.name.12th-avenue');
-	                    padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	                    box = pad(twelfthAvenueEnd, padding, context);
-	                    box.width *= 3;
-	                } else {
-	                    selected = _t('intro.graph.name.12th-avenue');
-	                    other = _t('intro.graph.name.washington-street');
-	                    padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	                    box = pad(twelfthAvenue, padding, context);
-	                    box.width /= 2;
-	                }
+	function _onRemoveAttribute(doc, el, newAttr, remove) {
+	  doc && doc._inc++;
+	  var ns = newAttr.namespaceURI;
 
-	                reveal(box,
-	                    helpString('intro.lines.multi_select',
-	                        { selected: selected, other1: other }) + ' ' +
-	                    helpString('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'),
-	                        { selected: selected, other2: other }),
-	                    { duration: 0 }
-	                );
-	            });
+	  if (ns == 'http://www.w3.org/2000/xmlns/') {
+	    //update namespace
+	    delete el._nsMap[newAttr.prefix ? newAttr.localName : ''];
+	  }
+	}
 
-	            context.on('enter.intro', function() {
-	                continueTo(multiSelect);
-	            });
+	function _onUpdateChild(doc, el, newChild) {
+	  if (doc && doc._inc) {
+	    doc._inc++; //update childNodes
 
-	            context.history().on('change.intro', function() {
-	                if (!_washingtonSegmentID ||
-	                    !context.hasEntity(_washingtonSegmentID) ||
-	                    !context.hasEntity(washingtonStreetID) ||
-	                    !context.hasEntity(twelfthAvenueID) ||
-	                    !context.hasEntity(eleventhAvenueEndID)) {
-	                    return continueTo(rightClickIntersection);
-	                }
-	            });
-	        }, 600);
+	    var cs = el.childNodes;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	    if (newChild) {
+	      cs[cs.length++] = newChild;
+	    } else {
+	      //console.log(1)
+	      var child = el.firstChild;
+	      var i = 0;
 
+	      while (child) {
+	        cs[i++] = child;
+	        child = child.nextSibling;
+	      }
 
-	    function multiRightClick() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
+	      cs.length = i;
+	    }
+	  }
+	}
+	/**
+	 * attributes;
+	 * children;
+	 * 
+	 * writeable properties:
+	 * nodeValue,Attr:value,CharacterData:data
+	 * prefix
+	 */
 
-	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(twelfthAvenue, padding, context);
 
-	        var rightClickString = helpString('intro.lines.multi_select_success') +
-	            helpString('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
-	        reveal(box, rightClickString);
+	function _removeChild(parentNode, child) {
+	  var previous = child.previousSibling;
+	  var next = child.nextSibling;
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(twelfthAvenue, padding, context);
-	            reveal(box, rightClickString, { duration: 0 });
-	        });
+	  if (previous) {
+	    previous.nextSibling = next;
+	  } else {
+	    parentNode.firstChild = next;
+	  }
 
-	        context.ui().editMenu().on('toggled.intro', function(open) {
-	            if (!open) { return; }
-
-	            timeout(function() {
-	                var ids = context.selectedIDs();
-	                if (ids.length === 2 &&
-	                    ids.indexOf(twelfthAvenueID) !== -1 &&
-	                    ids.indexOf(_washingtonSegmentID) !== -1) {
-	                        var node = selectMenuItem(context, 'delete').node();
-	                        if (!node) { return; }
-	                        continueTo(multiDelete);
-	                } else if (ids.length === 1 &&
-	                    ids.indexOf(_washingtonSegmentID) !== -1) {
-	                    return continueTo(multiSelect);
-	                } else {
-	                    return continueTo(didSplit);
-	                }
-	            }, 300);  // after edit menu visible
-	        });
+	  if (next) {
+	    next.previousSibling = previous;
+	  } else {
+	    parentNode.lastChild = previous;
+	  }
 
-	        context.history().on('change.intro', function() {
-	            if (!_washingtonSegmentID ||
-	                !context.hasEntity(_washingtonSegmentID) ||
-	                !context.hasEntity(washingtonStreetID) ||
-	                !context.hasEntity(twelfthAvenueID) ||
-	                !context.hasEntity(eleventhAvenueEndID)) {
-	                return continueTo(rightClickIntersection);
-	            }
-	        });
+	  _onUpdateChild(parentNode.ownerDocument, parentNode);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.ui().editMenu().on('toggled.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	  return child;
+	}
+	/**
+	 * preformance key(refChild == null)
+	 */
 
 
-	    function multiDelete() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
+	function _insertBefore(parentNode, newChild, nextChild) {
+	  var cp = newChild.parentNode;
 
-	        var node = selectMenuItem(context, 'delete').node();
-	        if (!node) { return continueTo(multiRightClick); }
+	  if (cp) {
+	    cp.removeChild(newChild); //remove and update
+	  }
 
-	        reveal('.edit-menu',
-	            helpString('intro.lines.multi_delete'),
-	            { padding: 50 }
-	        );
+	  if (newChild.nodeType === DOCUMENT_FRAGMENT_NODE) {
+	    var newFirst = newChild.firstChild;
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            reveal('.edit-menu',
-	                helpString('intro.lines.multi_delete'),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	    if (newFirst == null) {
+	      return newChild;
+	    }
 
-	        context.on('exit.intro', function() {
-	            if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-	                return continueTo(multiSelect);  // left select mode but roads still exist
-	            }
-	        });
+	    var newLast = newChild.lastChild;
+	  } else {
+	    newFirst = newLast = newChild;
+	  }
 
-	        context.history().on('change.intro', function() {
-	            if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-	                continueTo(retryDelete);         // changed something but roads still exist
-	            } else {
-	                continueTo(play);
-	            }
-	        });
+	  var pre = nextChild ? nextChild.previousSibling : parentNode.lastChild;
+	  newFirst.previousSibling = pre;
+	  newLast.nextSibling = nextChild;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	  if (pre) {
+	    pre.nextSibling = newFirst;
+	  } else {
+	    parentNode.firstChild = newFirst;
+	  }
 
+	  if (nextChild == null) {
+	    parentNode.lastChild = newLast;
+	  } else {
+	    nextChild.previousSibling = newLast;
+	  }
 
-	    function retryDelete() {
-	        context.enter(modeBrowse(context));
+	  do {
+	    newFirst.parentNode = parentNode;
+	  } while (newFirst !== newLast && (newFirst = newFirst.nextSibling));
 
-	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(twelfthAvenue, padding, context);
-	        reveal(box, helpString('intro.lines.retry_delete'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(multiSelect); }
-	        });
+	  _onUpdateChild(parentNode.ownerDocument || parentNode, parentNode); //console.log(parentNode.lastChild.nextSibling == null)
 
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
-	    }
 
+	  if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
+	    newChild.firstChild = newChild.lastChild = null;
+	  }
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.lines.play', { next: _t('intro.buildings.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-building',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
-	   }
+	  return newChild;
+	}
 
+	function _appendSingleChild(parentNode, newChild) {
+	  var cp = newChild.parentNode;
 
-	    chapter.enter = function() {
-	        addLine();
-	    };
+	  if (cp) {
+	    var pre = parentNode.lastChild;
+	    cp.removeChild(newChild); //remove and update
 
+	    var pre = parentNode.lastChild;
+	  }
 
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        select(window).on('pointerdown.intro mousedown.intro', null, true);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', null);
-	        context.container().select('.preset-list-button').on('click.intro', null);
-	    };
+	  var pre = parentNode.lastChild;
+	  newChild.parentNode = parentNode;
+	  newChild.previousSibling = pre;
+	  newChild.nextSibling = null;
 
+	  if (pre) {
+	    pre.nextSibling = newChild;
+	  } else {
+	    parentNode.firstChild = newChild;
+	  }
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	  parentNode.lastChild = newChild;
 
+	  _onUpdateChild(parentNode.ownerDocument, parentNode, newChild);
 
-	    return utilRebind(chapter, dispatch$1, 'on');
+	  return newChild; //console.log("__aa",parentNode.lastChild.nextSibling == null)
 	}
 
-	function uiIntroBuilding(context, reveal) {
-	    var dispatch$1 = dispatch('done');
-	    var house = [-85.62815, 41.95638];
-	    var tank = [-85.62732, 41.95347];
-	    var buildingCatetory = _mainPresetIndex.item('category-building');
-	    var housePreset = _mainPresetIndex.item('building/house');
-	    var tankPreset = _mainPresetIndex.item('man_made/storage_tank');
-	    var timeouts = [];
-	    var _houseID = null;
-	    var _tankID = null;
-
-
-	    var chapter = {
-	        title: 'intro.buildings.title'
-	    };
-
+	Document.prototype = {
+	  //implementation : null,
+	  nodeName: '#document',
+	  nodeType: DOCUMENT_NODE,
+	  doctype: null,
+	  documentElement: null,
+	  _inc: 1,
+	  insertBefore: function insertBefore(newChild, refChild) {
+	    //raises 
+	    if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
+	      var child = newChild.firstChild;
+
+	      while (child) {
+	        var next = child.nextSibling;
+	        this.insertBefore(child, refChild);
+	        child = next;
+	      }
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
+	      return newChild;
 	    }
 
+	    if (this.documentElement == null && newChild.nodeType == ELEMENT_NODE) {
+	      this.documentElement = newChild;
+	    }
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	    return _insertBefore(this, newChild, refChild), newChild.ownerDocument = this, newChild;
+	  },
+	  removeChild: function removeChild(oldChild) {
+	    if (this.documentElement == oldChild) {
+	      this.documentElement = null;
 	    }
 
+	    return _removeChild(this, oldChild);
+	  },
+	  // Introduced in DOM Level 2:
+	  importNode: function importNode(importedNode, deep) {
+	    return _importNode(this, importedNode, deep);
+	  },
+	  // Introduced in DOM Level 2:
+	  getElementById: function getElementById(id) {
+	    var rtv = null;
+
+	    _visitNode(this.documentElement, function (node) {
+	      if (node.nodeType == ELEMENT_NODE) {
+	        if (node.getAttribute('id') == id) {
+	          rtv = node;
+	          return true;
+	        }
+	      }
+	    });
 
-	    function revealHouse(center, text, options) {
-	        var padding = 160 * Math.pow(2, context.map().zoom() - 20);
-	        var box = pad(center, padding, context);
-	        reveal(box, text, options);
+	    return rtv;
+	  },
+	  //document factory method:
+	  createElement: function createElement(tagName) {
+	    var node = new Element();
+	    node.ownerDocument = this;
+	    node.nodeName = tagName;
+	    node.tagName = tagName;
+	    node.childNodes = new NodeList();
+	    var attrs = node.attributes = new NamedNodeMap();
+	    attrs._ownerElement = node;
+	    return node;
+	  },
+	  createDocumentFragment: function createDocumentFragment() {
+	    var node = new DocumentFragment();
+	    node.ownerDocument = this;
+	    node.childNodes = new NodeList();
+	    return node;
+	  },
+	  createTextNode: function createTextNode(data) {
+	    var node = new Text();
+	    node.ownerDocument = this;
+	    node.appendData(data);
+	    return node;
+	  },
+	  createComment: function createComment(data) {
+	    var node = new Comment();
+	    node.ownerDocument = this;
+	    node.appendData(data);
+	    return node;
+	  },
+	  createCDATASection: function createCDATASection(data) {
+	    var node = new CDATASection();
+	    node.ownerDocument = this;
+	    node.appendData(data);
+	    return node;
+	  },
+	  createProcessingInstruction: function createProcessingInstruction(target, data) {
+	    var node = new ProcessingInstruction();
+	    node.ownerDocument = this;
+	    node.tagName = node.target = target;
+	    node.nodeValue = node.data = data;
+	    return node;
+	  },
+	  createAttribute: function createAttribute(name) {
+	    var node = new Attr();
+	    node.ownerDocument = this;
+	    node.name = name;
+	    node.nodeName = name;
+	    node.localName = name;
+	    node.specified = true;
+	    return node;
+	  },
+	  createEntityReference: function createEntityReference(name) {
+	    var node = new EntityReference();
+	    node.ownerDocument = this;
+	    node.nodeName = name;
+	    return node;
+	  },
+	  // Introduced in DOM Level 2:
+	  createElementNS: function createElementNS(namespaceURI, qualifiedName) {
+	    var node = new Element();
+	    var pl = qualifiedName.split(':');
+	    var attrs = node.attributes = new NamedNodeMap();
+	    node.childNodes = new NodeList();
+	    node.ownerDocument = this;
+	    node.nodeName = qualifiedName;
+	    node.tagName = qualifiedName;
+	    node.namespaceURI = namespaceURI;
+
+	    if (pl.length == 2) {
+	      node.prefix = pl[0];
+	      node.localName = pl[1];
+	    } else {
+	      //el.prefix = null;
+	      node.localName = qualifiedName;
 	    }
 
-
-	    function revealTank(center, text, options) {
-	        var padding = 190 * Math.pow(2, context.map().zoom() - 19.5);
-	        var box = pad(center, padding, context);
-	        reveal(box, text, options);
+	    attrs._ownerElement = node;
+	    return node;
+	  },
+	  // Introduced in DOM Level 2:
+	  createAttributeNS: function createAttributeNS(namespaceURI, qualifiedName) {
+	    var node = new Attr();
+	    var pl = qualifiedName.split(':');
+	    node.ownerDocument = this;
+	    node.nodeName = qualifiedName;
+	    node.name = qualifiedName;
+	    node.namespaceURI = namespaceURI;
+	    node.specified = true;
+
+	    if (pl.length == 2) {
+	      node.prefix = pl[0];
+	      node.localName = pl[1];
+	    } else {
+	      //el.prefix = null;
+	      node.localName = qualifiedName;
 	    }
 
+	    return node;
+	  }
+	};
 
-	    function addHouse() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
-	        _houseID = null;
-
-	        var msec = transitionTime(house, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(house, 19, msec);
-
-	        timeout(function() {
-	            var tooltip = reveal('button.add-area',
-	                helpString('intro.buildings.add_building'));
-
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-buildings');
-
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-area') { return; }
-	                continueTo(startHouse);
-	            });
-	        }, msec + 100);
+	_extends(Document, Node);
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	function Element() {
+	  this._nsMap = {};
+	}
+	Element.prototype = {
+	  nodeType: ELEMENT_NODE,
+	  hasAttribute: function hasAttribute(name) {
+	    return this.getAttributeNode(name) != null;
+	  },
+	  getAttribute: function getAttribute(name) {
+	    var attr = this.getAttributeNode(name);
+	    return attr && attr.value || '';
+	  },
+	  getAttributeNode: function getAttributeNode(name) {
+	    return this.attributes.getNamedItem(name);
+	  },
+	  setAttribute: function setAttribute(name, value) {
+	    var attr = this.ownerDocument.createAttribute(name);
+	    attr.value = attr.nodeValue = "" + value;
+	    this.setAttributeNode(attr);
+	  },
+	  removeAttribute: function removeAttribute(name) {
+	    var attr = this.getAttributeNode(name);
+	    attr && this.removeAttributeNode(attr);
+	  },
+	  //four real opeartion method
+	  appendChild: function appendChild(newChild) {
+	    if (newChild.nodeType === DOCUMENT_FRAGMENT_NODE) {
+	      return this.insertBefore(newChild, null);
+	    } else {
+	      return _appendSingleChild(this, newChild);
 	    }
+	  },
+	  setAttributeNode: function setAttributeNode(newAttr) {
+	    return this.attributes.setNamedItem(newAttr);
+	  },
+	  setAttributeNodeNS: function setAttributeNodeNS(newAttr) {
+	    return this.attributes.setNamedItemNS(newAttr);
+	  },
+	  removeAttributeNode: function removeAttributeNode(oldAttr) {
+	    //console.log(this == oldAttr.ownerElement)
+	    return this.attributes.removeNamedItem(oldAttr.nodeName);
+	  },
+	  //get real attribute name,and remove it by removeAttributeNode
+	  removeAttributeNS: function removeAttributeNS(namespaceURI, localName) {
+	    var old = this.getAttributeNodeNS(namespaceURI, localName);
+	    old && this.removeAttributeNode(old);
+	  },
+	  hasAttributeNS: function hasAttributeNS(namespaceURI, localName) {
+	    return this.getAttributeNodeNS(namespaceURI, localName) != null;
+	  },
+	  getAttributeNS: function getAttributeNS(namespaceURI, localName) {
+	    var attr = this.getAttributeNodeNS(namespaceURI, localName);
+	    return attr && attr.value || '';
+	  },
+	  setAttributeNS: function setAttributeNS(namespaceURI, qualifiedName, value) {
+	    var attr = this.ownerDocument.createAttributeNS(namespaceURI, qualifiedName);
+	    attr.value = attr.nodeValue = "" + value;
+	    this.setAttributeNode(attr);
+	  },
+	  getAttributeNodeNS: function getAttributeNodeNS(namespaceURI, localName) {
+	    return this.attributes.getNamedItemNS(namespaceURI, localName);
+	  },
+	  getElementsByTagName: function getElementsByTagName(tagName) {
+	    return new LiveNodeList(this, function (base) {
+	      var ls = [];
+
+	      _visitNode(base, function (node) {
+	        if (node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)) {
+	          ls.push(node);
+	        }
+	      });
 
+	      return ls;
+	    });
+	  },
+	  getElementsByTagNameNS: function getElementsByTagNameNS(namespaceURI, localName) {
+	    return new LiveNodeList(this, function (base) {
+	      var ls = [];
 
-	    function startHouse() {
-	        if (context.mode().id !== 'add-area') {
-	            return continueTo(addHouse);
+	      _visitNode(base, function (node) {
+	        if (node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)) {
+	          ls.push(node);
 	        }
+	      });
 
-	        _houseID = null;
-	        context.map().zoomEase(20, 500);
+	      return ls;
+	    });
+	  }
+	};
+	Document.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;
+	Document.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;
 
-	        timeout(function() {
-	            var startString = helpString('intro.buildings.start_building') +
-	                helpString('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-	            revealHouse(house, startString);
+	_extends(Element, Node);
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealHouse(house, startString, { duration: 0 });
-	            });
+	function Attr() {}
+	Attr.prototype.nodeType = ATTRIBUTE_NODE;
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'draw-area') { return chapter.restart(); }
-	                continueTo(continueHouse);
-	            });
+	_extends(Attr, Node);
 
-	        }, 550);  // after easing
+	function CharacterData() {}
+	CharacterData.prototype = {
+	  data: '',
+	  substringData: function substringData(offset, count) {
+	    return this.data.substring(offset, offset + count);
+	  },
+	  appendData: function appendData(text) {
+	    text = this.data + text;
+	    this.nodeValue = this.data = text;
+	    this.length = text.length;
+	  },
+	  insertData: function insertData(offset, text) {
+	    this.replaceData(offset, 0, text);
+	  },
+	  appendChild: function appendChild(newChild) {
+	    throw new Error(ExceptionMessage[HIERARCHY_REQUEST_ERR]);
+	  },
+	  deleteData: function deleteData(offset, count) {
+	    this.replaceData(offset, count, "");
+	  },
+	  replaceData: function replaceData(offset, count, text) {
+	    var start = this.data.substring(0, offset);
+	    var end = this.data.substring(offset + count);
+	    text = start + text + end;
+	    this.nodeValue = this.data = text;
+	    this.length = text.length;
+	  }
+	};
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	_extends(CharacterData, Node);
 
+	function Text() {}
+	Text.prototype = {
+	  nodeName: "#text",
+	  nodeType: TEXT_NODE,
+	  splitText: function splitText(offset) {
+	    var text = this.data;
+	    var newText = text.substring(offset);
+	    text = text.substring(0, offset);
+	    this.data = this.nodeValue = text;
+	    this.length = text.length;
+	    var newNode = this.ownerDocument.createTextNode(newText);
 
-	    function continueHouse() {
-	        if (context.mode().id !== 'draw-area') {
-	            return continueTo(addHouse);
-	        }
+	    if (this.parentNode) {
+	      this.parentNode.insertBefore(newNode, this.nextSibling);
+	    }
 
-	        _houseID = null;
+	    return newNode;
+	  }
+	};
 
-	        var continueString = helpString('intro.buildings.continue_building') + '{br}' +
-	            helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.buildings.finish_building');
+	_extends(Text, CharacterData);
 
-	        revealHouse(house, continueString);
+	function Comment() {}
+	Comment.prototype = {
+	  nodeName: "#comment",
+	  nodeType: COMMENT_NODE
+	};
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            revealHouse(house, continueString, { duration: 0 });
-	        });
+	_extends(Comment, CharacterData);
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-area') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                var graph = context.graph();
-	                var way = context.entity(context.selectedIDs()[0]);
-	                var nodes = graph.childNodes(way);
-	                var points = utilArrayUniq(nodes)
-	                    .map(function(n) { return context.projection(n.loc); });
-
-	                if (isMostlySquare(points)) {
-	                    _houseID = way.id;
-	                    return continueTo(chooseCategoryBuilding);
-	                } else {
-	                    return continueTo(retryHouse);
-	                }
+	function CDATASection() {}
+	CDATASection.prototype = {
+	  nodeName: "#cdata-section",
+	  nodeType: CDATA_SECTION_NODE
+	};
 
-	            } else {
-	                return chapter.restart();
-	            }
-	        });
+	_extends(CDATASection, CharacterData);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	function DocumentType() {}
+	DocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;
 
+	_extends(DocumentType, Node);
 
-	    function retryHouse() {
-	        var onClick = function() { continueTo(addHouse); };
+	function Notation() {}
+	Notation.prototype.nodeType = NOTATION_NODE;
 
-	        revealHouse(house, helpString('intro.buildings.retry_building'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	_extends(Notation, Node);
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            revealHouse(house, helpString('intro.buildings.retry_building'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	function Entity() {}
+	Entity.prototype.nodeType = ENTITY_NODE;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	_extends(Entity, Node);
 
+	function EntityReference() {}
+	EntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;
 
-	    function chooseCategoryBuilding() {
-	        if (!_houseID || !context.hasEntity(_houseID)) {
-	            return addHouse();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	            context.enter(modeSelect(context, [_houseID]));
-	        }
+	_extends(EntityReference, Node);
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	function DocumentFragment() {}
+	DocumentFragment.prototype.nodeName = "#document-fragment";
+	DocumentFragment.prototype.nodeType = DOCUMENT_FRAGMENT_NODE;
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	_extends(DocumentFragment, Node);
 
-	            var button = context.container().select('.preset-category-building .preset-list-button');
+	function ProcessingInstruction() {}
 
-	            reveal(button.node(),
-	                helpString('intro.buildings.choose_category_building', { category: buildingCatetory.name() })
-	            );
+	ProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;
 
-	            button.on('click.intro', function() {
-	                button.on('click.intro', null);
-	                continueTo(choosePresetHouse);
-	            });
+	_extends(ProcessingInstruction, Node);
 
-	        }, 400);  // after preset list pane visible..
+	function XMLSerializer$1() {}
 
+	XMLSerializer$1.prototype.serializeToString = function (node, isHtml, nodeFilter) {
+	  return nodeSerializeToString.call(node, isHtml, nodeFilter);
+	};
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_houseID || !context.hasEntity(_houseID)) {
-	                return continueTo(addHouse);
-	            }
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	                return continueTo(chooseCategoryBuilding);
-	            }
-	        });
+	Node.prototype.toString = nodeSerializeToString;
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	function nodeSerializeToString(isHtml, nodeFilter) {
+	  var buf = [];
+	  var refNode = this.nodeType == 9 ? this.documentElement : this;
+	  var prefix = refNode.prefix;
+	  var uri = refNode.namespaceURI;
+
+	  if (uri && prefix == null) {
+	    //console.log(prefix)
+	    var prefix = refNode.lookupPrefix(uri);
+
+	    if (prefix == null) {
+	      //isHTML = true;
+	      var visibleNamespaces = [{
+	        namespace: uri,
+	        prefix: null
+	      } //{namespace:uri,prefix:''}
+	      ];
 	    }
+	  }
 
+	  serializeToString(this, buf, isHtml, nodeFilter, visibleNamespaces); //console.log('###',this.nodeType,uri,prefix,buf.join(''))
 
-	    function choosePresetHouse() {
-	        if (!_houseID || !context.hasEntity(_houseID)) {
-	            return addHouse();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	            context.enter(modeSelect(context, [_houseID]));
-	        }
+	  return buf.join('');
+	}
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	function needNamespaceDefine(node, isHTML, visibleNamespaces) {
+	  var prefix = node.prefix || '';
+	  var uri = node.namespaceURI;
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	  if (!prefix && !uri) {
+	    return false;
+	  }
 
-	            var button = context.container().select('.preset-building-house .preset-list-button');
+	  if (prefix === "xml" && uri === "http://www.w3.org/XML/1998/namespace" || uri == 'http://www.w3.org/2000/xmlns/') {
+	    return false;
+	  }
 
-	            reveal(button.node(),
-	                helpString('intro.buildings.choose_preset_house', { preset: housePreset.name() }),
-	                { duration: 300 }
-	            );
+	  var i = visibleNamespaces.length; //console.log('@@@@',node.tagName,prefix,uri,visibleNamespaces)
 
-	            button.on('click.intro', function() {
-	                button.on('click.intro', null);
-	                continueTo(closeEditorHouse);
-	            });
+	  while (i--) {
+	    var ns = visibleNamespaces[i]; // get namespace prefix
+	    //console.log(node.nodeType,node.tagName,ns.prefix,prefix)
 
-	        }, 400);  // after preset list pane visible..
+	    if (ns.prefix == prefix) {
+	      return ns.namespace != uri;
+	    }
+	  } //console.log(isHTML,uri,prefix=='')
+	  //if(isHTML && prefix ==null && uri == 'http://www.w3.org/1999/xhtml'){
+	  //	return false;
+	  //}
+	  //node.flag = '11111'
+	  //console.error(3,true,node.flag,node.prefix,node.namespaceURI)
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_houseID || !context.hasEntity(_houseID)) {
-	                return continueTo(addHouse);
-	            }
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	                return continueTo(chooseCategoryBuilding);
-	            }
-	        });
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	  return true;
+	}
 
+	function serializeToString(node, buf, isHTML, nodeFilter, visibleNamespaces) {
+	  if (nodeFilter) {
+	    node = nodeFilter(node);
 
-	    function closeEditorHouse() {
-	        if (!_houseID || !context.hasEntity(_houseID)) {
-	            return addHouse();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	            context.enter(modeSelect(context, [_houseID]));
-	        }
+	    if (node) {
+	      if (typeof node == 'string') {
+	        buf.push(node);
+	        return;
+	      }
+	    } else {
+	      return;
+	    } //buf.sort.apply(attrs, attributeSorter);
 
-	        context.history().checkpoint('hasHouse');
+	  }
 
-	        context.on('exit.intro', function() {
-	            continueTo(rightClickHouse);
-	        });
+	  switch (node.nodeType) {
+	    case ELEMENT_NODE:
+	      if (!visibleNamespaces) visibleNamespaces = [];
+	      var startVisibleNamespaces = visibleNamespaces.length;
+	      var attrs = node.attributes;
+	      var len = attrs.length;
+	      var child = node.firstChild;
+	      var nodeName = node.tagName;
+	      isHTML = htmlns === node.namespaceURI || isHTML;
+	      buf.push('<', nodeName);
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.buildings.close', { button: icon('#iD-icon-close', 'pre-text') })
-	            );
-	        }, 500);
+	      for (var i = 0; i < len; i++) {
+	        // add namespaces for attributes
+	        var attr = attrs.item(i);
+
+	        if (attr.prefix == 'xmlns') {
+	          visibleNamespaces.push({
+	            prefix: attr.localName,
+	            namespace: attr.value
+	          });
+	        } else if (attr.nodeName == 'xmlns') {
+	          visibleNamespaces.push({
+	            prefix: '',
+	            namespace: attr.value
+	          });
+	        }
+	      }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
+	      for (var i = 0; i < len; i++) {
+	        var attr = attrs.item(i);
+
+	        if (needNamespaceDefine(attr, isHTML, visibleNamespaces)) {
+	          var prefix = attr.prefix || '';
+	          var uri = attr.namespaceURI;
+	          var ns = prefix ? ' xmlns:' + prefix : " xmlns";
+	          buf.push(ns, '="', uri, '"');
+	          visibleNamespaces.push({
+	            prefix: prefix,
+	            namespace: uri
+	          });
 	        }
-	    }
 
+	        serializeToString(attr, buf, isHTML, nodeFilter, visibleNamespaces);
+	      } // add namespace for current node		
 
-	    function rightClickHouse() {
-	        if (!_houseID) { return chapter.restart(); }
 
-	        context.enter(modeBrowse(context));
-	        context.history().reset('hasHouse');
-	        var zoom = context.map().zoom();
-	        if (zoom < 20) {
-	            zoom = 20;
-	        }
-	        context.map().centerZoomEase(house, zoom, 500);
-
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') { return; }
-	            var ids = context.selectedIDs();
-	            if (ids.length !== 1 || ids[0] !== _houseID) { return; }
-
-	            timeout(function() {
-	                var node = selectMenuItem(context, 'orthogonalize').node();
-	                if (!node) { return; }
-	                continueTo(clickSquare);
-	            }, 50);  // after menu visible
+	      if (needNamespaceDefine(node, isHTML, visibleNamespaces)) {
+	        var prefix = node.prefix || '';
+	        var uri = node.namespaceURI;
+	        var ns = prefix ? ' xmlns:' + prefix : " xmlns";
+	        buf.push(ns, '="', uri, '"');
+	        visibleNamespaces.push({
+	          prefix: prefix,
+	          namespace: uri
 	        });
+	      }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            var rightclickString = helpString('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
-	            revealHouse(house, rightclickString, { duration: 0 });
-	        });
+	      if (child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)) {
+	        buf.push('>'); //if is cdata child node
 
-	        context.history().on('change.intro', function() {
-	            continueTo(rightClickHouse);
-	        });
+	        if (isHTML && /^script$/i.test(nodeName)) {
+	          while (child) {
+	            if (child.data) {
+	              buf.push(child.data);
+	            } else {
+	              serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
+	            }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
+	            child = child.nextSibling;
+	          }
+	        } else {
+	          while (child) {
+	            serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
+	            child = child.nextSibling;
+	          }
 	        }
-	    }
 
+	        buf.push('</', nodeName, '>');
+	      } else {
+	        buf.push('/>');
+	      } // remove added visible namespaces
+	      //visibleNamespaces.length = startVisibleNamespaces;
 
-	    function clickSquare() {
-	        if (!_houseID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_houseID);
-	        if (!entity) { return continueTo(rightClickHouse); }
 
-	        var node = selectMenuItem(context, 'orthogonalize').node();
-	        if (!node) { return continueTo(rightClickHouse); }
+	      return;
 
-	        var wasChanged = false;
+	    case DOCUMENT_NODE:
+	    case DOCUMENT_FRAGMENT_NODE:
+	      var child = node.firstChild;
 
-	        reveal('.edit-menu',
-	            helpString('intro.buildings.square_building'),
-	            { padding: 50 }
-	        );
+	      while (child) {
+	        serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
+	        child = child.nextSibling;
+	      }
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'browse') {
-	                continueTo(rightClickHouse);
-	            } else if (mode.id === 'move' || mode.id === 'rotate') {
-	                continueTo(retryClickSquare);
-	            }
-	        });
+	      return;
 
-	        context.map().on('move.intro', function() {
-	            var node = selectMenuItem(context, 'orthogonalize').node();
-	            if (!wasChanged && !node) { return continueTo(rightClickHouse); }
+	    case ATTRIBUTE_NODE:
+	      return buf.push(' ', node.name, '="', node.value.replace(/[<&"]/g, _xmlEncoder), '"');
 
-	            reveal('.edit-menu',
-	                helpString('intro.buildings.square_building'),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	    case TEXT_NODE:
+	      return buf.push(node.data.replace(/[<&]/g, _xmlEncoder));
 
-	        context.history().on('change.intro', function() {
-	            wasChanged = true;
-	            context.history().on('change.intro', null);
+	    case CDATA_SECTION_NODE:
+	      return buf.push('<![CDATA[', node.data, ']]>');
 
-	            // Something changed.  Wait for transition to complete and check undo annotation.
-	            timeout(function() {
-	                if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature.single')) {
-	                    continueTo(doneSquare);
-	                } else {
-	                    continueTo(retryClickSquare);
-	                }
-	            }, 500);  // after transitioned actions
-	        });
+	    case COMMENT_NODE:
+	      return buf.push("<!--", node.data, "-->");
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	    case DOCUMENT_TYPE_NODE:
+	      var pubid = node.publicId;
+	      var sysid = node.systemId;
+	      buf.push('<!DOCTYPE ', node.name);
 
+	      if (pubid) {
+	        buf.push(' PUBLIC "', pubid);
 
-	    function retryClickSquare() {
-	        context.enter(modeBrowse(context));
+	        if (sysid && sysid != '.') {
+	          buf.push('" "', sysid);
+	        }
 
-	        revealHouse(house, helpString('intro.buildings.retry_square'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(rightClickHouse); }
-	        });
+	        buf.push('">');
+	      } else if (sysid && sysid != '.') {
+	        buf.push(' SYSTEM "', sysid, '">');
+	      } else {
+	        var sub = node.internalSubset;
 
-	        function continueTo(nextStep) {
-	            nextStep();
+	        if (sub) {
+	          buf.push(" [", sub, "]");
 	        }
-	    }
 
+	        buf.push(">");
+	      }
 
-	    function doneSquare() {
-	        context.history().checkpoint('doneSquare');
+	      return;
 
-	        revealHouse(house, helpString('intro.buildings.done_square'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(addTank); }
-	        });
+	    case PROCESSING_INSTRUCTION_NODE:
+	      return buf.push("<?", node.target, " ", node.data, "?>");
 
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
-	    }
+	    case ENTITY_REFERENCE_NODE:
+	      return buf.push('&', node.nodeName, ';');
+	    //case ENTITY_NODE:
+	    //case NOTATION_NODE:
 
+	    default:
+	      buf.push('??', node.nodeName);
+	  }
+	}
 
-	    function addTank() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('doneSquare');
-	        _tankID = null;
+	function _importNode(doc, node, deep) {
+	  var node2;
 
-	        var msec = transitionTime(tank, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(tank, 19.5, msec);
+	  switch (node.nodeType) {
+	    case ELEMENT_NODE:
+	      node2 = node.cloneNode(false);
+	      node2.ownerDocument = doc;
+	    //var attrs = node2.attributes;
+	    //var len = attrs.length;
+	    //for(var i=0;i<len;i++){
+	    //node2.setAttributeNodeNS(importNode(doc,attrs.item(i),deep));
+	    //}
 
-	        timeout(function() {
-	            reveal('button.add-area',
-	                helpString('intro.buildings.add_tank')
-	            );
+	    case DOCUMENT_FRAGMENT_NODE:
+	      break;
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-area') { return; }
-	                continueTo(startTank);
-	            });
-	        }, msec + 100);
+	    case ATTRIBUTE_NODE:
+	      deep = true;
+	      break;
+	    //case ENTITY_REFERENCE_NODE:
+	    //case PROCESSING_INSTRUCTION_NODE:
+	    ////case TEXT_NODE:
+	    //case CDATA_SECTION_NODE:
+	    //case COMMENT_NODE:
+	    //	deep = false;
+	    //	break;
+	    //case DOCUMENT_NODE:
+	    //case DOCUMENT_TYPE_NODE:
+	    //cannot be imported.
+	    //case ENTITY_NODE:
+	    //case NOTATION_NODE：
+	    //can not hit in level3
+	    //default:throw e;
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	  if (!node2) {
+	    node2 = node.cloneNode(false); //false
+	  }
 
+	  node2.ownerDocument = doc;
+	  node2.parentNode = null;
 
-	    function startTank() {
-	        if (context.mode().id !== 'add-area') {
-	            return continueTo(addTank);
-	        }
+	  if (deep) {
+	    var child = node.firstChild;
 
-	        _tankID = null;
+	    while (child) {
+	      node2.appendChild(_importNode(doc, child, deep));
+	      child = child.nextSibling;
+	    }
+	  }
 
-	        timeout(function() {
-	            var startString = helpString('intro.buildings.start_tank') +
-	                helpString('intro.buildings.tank_edge_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-	            revealTank(tank, startString);
+	  return node2;
+	} //
+	//var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,
+	//					attributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealTank(tank, startString, { duration: 0 });
-	            });
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'draw-area') { return chapter.restart(); }
-	                continueTo(continueTank);
-	            });
+	function _cloneNode(doc, node, deep) {
+	  var node2 = new node.constructor();
 
-	        }, 550);  // after easing
+	  for (var n in node) {
+	    var v = node[n];
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    if (_typeof(v) != 'object') {
+	      if (v != node2[n]) {
+	        node2[n] = v;
+	      }
 	    }
+	  }
 
+	  if (node.childNodes) {
+	    node2.childNodes = new NodeList();
+	  }
 
-	    function continueTank() {
-	        if (context.mode().id !== 'draw-area') {
-	            return continueTo(addTank);
-	        }
+	  node2.ownerDocument = doc;
 
-	        _tankID = null;
+	  switch (node2.nodeType) {
+	    case ELEMENT_NODE:
+	      var attrs = node.attributes;
+	      var attrs2 = node2.attributes = new NamedNodeMap();
+	      var len = attrs.length;
+	      attrs2._ownerElement = node2;
 
-	        var continueString = helpString('intro.buildings.continue_tank') + '{br}' +
-	            helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.buildings.finish_tank');
+	      for (var i = 0; i < len; i++) {
+	        node2.setAttributeNode(_cloneNode(doc, attrs.item(i), true));
+	      }
 
-	        revealTank(tank, continueString);
+	      break;
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            revealTank(tank, continueString, { duration: 0 });
-	        });
+	    case ATTRIBUTE_NODE:
+	      deep = true;
+	  }
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-area') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                _tankID = context.selectedIDs()[0];
-	                return continueTo(searchPresetTank);
-	            } else {
-	                return continueTo(addTank);
-	            }
-	        });
+	  if (deep) {
+	    var child = node.firstChild;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    while (child) {
+	      node2.appendChild(_cloneNode(doc, child, deep));
+	      child = child.nextSibling;
 	    }
+	  }
 
+	  return node2;
+	}
 
-	    function searchPresetTank() {
-	        if (!_tankID || !context.hasEntity(_tankID)) {
-	            return addTank();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-	            context.enter(modeSelect(context, [_tankID]));
-	        }
-
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	function __set__(object, key, value) {
+	  object[key] = value;
+	} //do dynamic
 
-	            context.container().select('.preset-search-input')
-	                .on('keydown.intro', null)
-	                .on('keyup.intro', checkPresetSearch);
 
-	            reveal('.preset-search-input',
-	                helpString('intro.buildings.search_tank', { preset: tankPreset.name() })
-	            );
-	        }, 400);  // after preset list pane visible..
+	try {
+	  if (Object.defineProperty) {
+	    var getTextContent = function getTextContent(node) {
+	      switch (node.nodeType) {
+	        case ELEMENT_NODE:
+	        case DOCUMENT_FRAGMENT_NODE:
+	          var buf = [];
+	          node = node.firstChild;
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_tankID || !context.hasEntity(_tankID)) {
-	                return continueTo(addTank);
+	          while (node) {
+	            if (node.nodeType !== 7 && node.nodeType !== 8) {
+	              buf.push(getTextContent(node));
 	            }
 
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
-	                // keep the user's area selected..
-	                context.enter(modeSelect(context, [_tankID]));
+	            node = node.nextSibling;
+	          }
 
-	                // reset pane, in case user somehow happened to change it..
-	                context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-	                // disallow scrolling
-	                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	          return buf.join('');
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', null)
-	                    .on('keyup.intro', checkPresetSearch);
+	        default:
+	          return node.nodeValue;
+	      }
+	    };
 
-	                reveal('.preset-search-input',
-	                    helpString('intro.buildings.search_tank', { preset: tankPreset.name() })
-	                );
+	    Object.defineProperty(LiveNodeList.prototype, 'length', {
+	      get: function get() {
+	        _updateLiveList(this);
 
-	                context.history().on('change.intro', null);
+	        return this.$$length;
+	      }
+	    });
+	    Object.defineProperty(Node.prototype, 'textContent', {
+	      get: function get() {
+	        return getTextContent(this);
+	      },
+	      set: function set(data) {
+	        switch (this.nodeType) {
+	          case ELEMENT_NODE:
+	          case DOCUMENT_FRAGMENT_NODE:
+	            while (this.firstChild) {
+	              this.removeChild(this.firstChild);
 	            }
-	        });
 
-	        function checkPresetSearch() {
-	            var first = context.container().select('.preset-list-item:first-child');
-
-	            if (first.classed('preset-man_made-storage_tank')) {
-	                reveal(first.select('.preset-list-button').node(),
-	                    helpString('intro.buildings.choose_tank', { preset: tankPreset.name() }),
-	                    { duration: 300 }
-	                );
+	            if (data || String(data)) {
+	              this.appendChild(this.ownerDocument.createTextNode(data));
+	            }
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', eventCancel, true)
-	                    .on('keyup.intro', null);
+	            break;
 
-	                context.history().on('change.intro', function() {
-	                    continueTo(closeEditorTank);
-	                });
-	            }
+	          default:
+	            //TODO:
+	            this.data = data;
+	            this.value = data;
+	            this.nodeValue = data;
 	        }
+	      }
+	    });
 
-	        function continueTo(nextStep) {
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	            nextStep();
-	        }
-	    }
+	    __set__ = function __set__(object, key, value) {
+	      //console.log(value)
+	      object['$$' + key] = value;
+	    };
+	  }
+	} catch (e) {//ie8
+	} //if(typeof require == 'function'){
 
 
-	    function closeEditorTank() {
-	        if (!_tankID || !context.hasEntity(_tankID)) {
-	            return addTank();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-	            context.enter(modeSelect(context, [_tankID]));
-	        }
+	var DOMImplementation_1 = DOMImplementation;
+	var XMLSerializer_1 = XMLSerializer$1; //}
 
-	        context.history().checkpoint('hasTank');
+	var dom = {
+	  DOMImplementation: DOMImplementation_1,
+	  XMLSerializer: XMLSerializer_1
+	};
 
-	        context.on('exit.intro', function() {
-	            continueTo(rightClickTank);
-	        });
+	var domParser = createCommonjsModule(function (module, exports) {
+	  function DOMParser(options) {
+	    this.options = options || {
+	      locator: {}
+	    };
+	  }
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.buildings.close', { button: icon('#iD-icon-close', 'pre-text') })
-	            );
-	        }, 500);
+	  DOMParser.prototype.parseFromString = function (source, mimeType) {
+	    var options = this.options;
+	    var sax = new XMLReader();
+	    var domBuilder = options.domBuilder || new DOMHandler(); //contentHandler and LexicalHandler
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    var errorHandler = options.errorHandler;
+	    var locator = options.locator;
+	    var defaultNSMap = options.xmlns || {};
+	    var entityMap = {
+	      'lt': '<',
+	      'gt': '>',
+	      'amp': '&',
+	      'quot': '"',
+	      'apos': "'"
+	    };
+
+	    if (locator) {
+	      domBuilder.setDocumentLocator(locator);
 	    }
 
+	    sax.errorHandler = buildErrorHandler(errorHandler, domBuilder, locator);
+	    sax.domBuilder = options.domBuilder || domBuilder;
 
-	    function rightClickTank() {
-	        if (!_tankID) { return continueTo(addTank); }
+	    if (/\/x?html?$/.test(mimeType)) {
+	      entityMap.nbsp = '\xa0';
+	      entityMap.copy = '\xa9';
+	      defaultNSMap[''] = 'http://www.w3.org/1999/xhtml';
+	    }
 
-	        context.enter(modeBrowse(context));
-	        context.history().reset('hasTank');
-	        context.map().centerEase(tank, 500);
-
-	        timeout(function() {
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'select') { return; }
-	                var ids = context.selectedIDs();
-	                if (ids.length !== 1 || ids[0] !== _tankID) { return; }
-
-	                timeout(function() {
-	                    var node = selectMenuItem(context, 'circularize').node();
-	                    if (!node) { return; }
-	                    continueTo(clickCircle);
-	                }, 50);  // after menu visible
-	            });
+	    defaultNSMap.xml = defaultNSMap.xml || 'http://www.w3.org/XML/1998/namespace';
 
-	            var rightclickString = helpString('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_tank' : 'edit_menu_tank_touch'));
+	    if (source) {
+	      sax.parse(source, defaultNSMap, entityMap);
+	    } else {
+	      sax.errorHandler.error("invalid doc source");
+	    }
 
-	            revealTank(tank, rightclickString);
+	    return domBuilder.doc;
+	  };
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealTank(tank, rightclickString, { duration: 0 });
-	            });
+	  function buildErrorHandler(errorImpl, domBuilder, locator) {
+	    if (!errorImpl) {
+	      if (domBuilder instanceof DOMHandler) {
+	        return domBuilder;
+	      }
 
-	            context.history().on('change.intro', function() {
-	                continueTo(rightClickTank);
-	            });
+	      errorImpl = domBuilder;
+	    }
 
-	        }, 600);
+	    var errorHandler = {};
+	    var isCallback = errorImpl instanceof Function;
+	    locator = locator || {};
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	    function build(key) {
+	      var fn = errorImpl[key];
 
+	      if (!fn && isCallback) {
+	        fn = errorImpl.length == 2 ? function (msg) {
+	          errorImpl(key, msg);
+	        } : errorImpl;
+	      }
 
-	    function clickCircle() {
-	        if (!_tankID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_tankID);
-	        if (!entity) { return continueTo(rightClickTank); }
+	      errorHandler[key] = fn && function (msg) {
+	        fn('[xmldom ' + key + ']\t' + msg + _locator(locator));
+	      } || function () {};
+	    }
 
-	        var node = selectMenuItem(context, 'circularize').node();
-	        if (!node) { return continueTo(rightClickTank); }
+	    build('warning');
+	    build('error');
+	    build('fatalError');
+	    return errorHandler;
+	  } //console.log('#\n\n\n\n\n\n\n####')
 
-	        var wasChanged = false;
+	  /**
+	   * +ContentHandler+ErrorHandler
+	   * +LexicalHandler+EntityResolver2
+	   * -DeclHandler-DTDHandler 
+	   * 
+	   * DefaultHandler:EntityResolver, DTDHandler, ContentHandler, ErrorHandler
+	   * DefaultHandler2:DefaultHandler,LexicalHandler, DeclHandler, EntityResolver2
+	   * @link http://www.saxproject.org/apidoc/org/xml/sax/helpers/DefaultHandler.html
+	   */
 
-	        reveal('.edit-menu',
-	            helpString('intro.buildings.circle_tank'),
-	            { padding: 50 }
-	        );
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'browse') {
-	                continueTo(rightClickTank);
-	            } else if (mode.id === 'move' || mode.id === 'rotate') {
-	                continueTo(retryClickCircle);
-	            }
-	        });
+	  function DOMHandler() {
+	    this.cdata = false;
+	  }
 
-	        context.map().on('move.intro', function() {
-	            var node = selectMenuItem(context, 'circularize').node();
-	            if (!wasChanged && !node) { return continueTo(rightClickTank); }
+	  function position(locator, node) {
+	    node.lineNumber = locator.lineNumber;
+	    node.columnNumber = locator.columnNumber;
+	  }
+	  /**
+	   * @see org.xml.sax.ContentHandler#startDocument
+	   * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html
+	   */
 
-	            reveal('.edit-menu',
-	                helpString('intro.buildings.circle_tank'),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
 
-	        context.history().on('change.intro', function() {
-	            wasChanged = true;
-	            context.history().on('change.intro', null);
+	  DOMHandler.prototype = {
+	    startDocument: function startDocument() {
+	      this.doc = new DOMImplementation().createDocument(null, null, null);
 
-	            // Something changed.  Wait for transition to complete and check undo annotation.
-	            timeout(function() {
-	                if (context.history().undoAnnotation() === _t('operations.circularize.annotation.single')) {
-	                    continueTo(play);
-	                } else {
-	                    continueTo(retryClickCircle);
-	                }
-	            }, 500);  // after transitioned actions
-	        });
+	      if (this.locator) {
+	        this.doc.documentURI = this.locator.systemId;
+	      }
+	    },
+	    startElement: function startElement(namespaceURI, localName, qName, attrs) {
+	      var doc = this.doc;
+	      var el = doc.createElementNS(namespaceURI, qName || localName);
+	      var len = attrs.length;
+	      appendElement(this, el);
+	      this.currentElement = el;
+	      this.locator && position(this.locator, el);
+
+	      for (var i = 0; i < len; i++) {
+	        var namespaceURI = attrs.getURI(i);
+	        var value = attrs.getValue(i);
+	        var qName = attrs.getQName(i);
+	        var attr = doc.createAttributeNS(namespaceURI, qName);
+	        this.locator && position(attrs.getLocator(i), attr);
+	        attr.value = attr.nodeValue = value;
+	        el.setAttributeNode(attr);
+	      }
+	    },
+	    endElement: function endElement(namespaceURI, localName, qName) {
+	      var current = this.currentElement;
+	      var tagName = current.tagName;
+	      this.currentElement = current.parentNode;
+	    },
+	    startPrefixMapping: function startPrefixMapping(prefix, uri) {},
+	    endPrefixMapping: function endPrefixMapping(prefix) {},
+	    processingInstruction: function processingInstruction(target, data) {
+	      var ins = this.doc.createProcessingInstruction(target, data);
+	      this.locator && position(this.locator, ins);
+	      appendElement(this, ins);
+	    },
+	    ignorableWhitespace: function ignorableWhitespace(ch, start, length) {},
+	    characters: function characters(chars, start, length) {
+	      chars = _toString.apply(this, arguments); //console.log(chars)
+
+	      if (chars) {
+	        if (this.cdata) {
+	          var charNode = this.doc.createCDATASection(chars);
+	        } else {
+	          var charNode = this.doc.createTextNode(chars);
+	        }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
+	        if (this.currentElement) {
+	          this.currentElement.appendChild(charNode);
+	        } else if (/^\s*$/.test(chars)) {
+	          this.doc.appendChild(charNode); //process xml
 	        }
-	    }
 
+	        this.locator && position(this.locator, charNode);
+	      }
+	    },
+	    skippedEntity: function skippedEntity(name) {},
+	    endDocument: function endDocument() {
+	      this.doc.normalize();
+	    },
+	    setDocumentLocator: function setDocumentLocator(locator) {
+	      if (this.locator = locator) {
+	        // && !('lineNumber' in locator)){
+	        locator.lineNumber = 0;
+	      }
+	    },
+	    //LexicalHandler
+	    comment: function comment(chars, start, length) {
+	      chars = _toString.apply(this, arguments);
+	      var comm = this.doc.createComment(chars);
+	      this.locator && position(this.locator, comm);
+	      appendElement(this, comm);
+	    },
+	    startCDATA: function startCDATA() {
+	      //used in characters() methods
+	      this.cdata = true;
+	    },
+	    endCDATA: function endCDATA() {
+	      this.cdata = false;
+	    },
+	    startDTD: function startDTD(name, publicId, systemId) {
+	      var impl = this.doc.implementation;
 
-	    function retryClickCircle() {
-	        context.enter(modeBrowse(context));
+	      if (impl && impl.createDocumentType) {
+	        var dt = impl.createDocumentType(name, publicId, systemId);
+	        this.locator && position(this.locator, dt);
+	        appendElement(this, dt);
+	      }
+	    },
 
-	        revealTank(tank, helpString('intro.buildings.retry_circle'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(rightClickTank); }
-	        });
+	    /**
+	     * @see org.xml.sax.ErrorHandler
+	     * @link http://www.saxproject.org/apidoc/org/xml/sax/ErrorHandler.html
+	     */
+	    warning: function warning(error) {
+	      console.warn('[xmldom warning]\t' + error, _locator(this.locator));
+	    },
+	    error: function error(_error) {
+	      console.error('[xmldom error]\t' + _error, _locator(this.locator));
+	    },
+	    fatalError: function fatalError(error) {
+	      console.error('[xmldom fatalError]\t' + error, _locator(this.locator));
+	      throw error;
+	    }
+	  };
 
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
+	  function _locator(l) {
+	    if (l) {
+	      return '\n@' + (l.systemId || '') + '#[line:' + l.lineNumber + ',col:' + l.columnNumber + ']';
 	    }
+	  }
 
+	  function _toString(chars, start, length) {
+	    if (typeof chars == 'string') {
+	      return chars.substr(start, length);
+	    } else {
+	      //java sax connect width xmldom on rhino(what about: "? && !(chars instanceof String)")
+	      if (chars.length >= start + length || start) {
+	        return new java.lang.String(chars, start, length) + '';
+	      }
 
-	    function play() {
-	        dispatch$1.call('done');
-	        reveal('.ideditor',
-	            helpString('intro.buildings.play', { next: _t('intro.startediting.title') }), {
-	                tooltipBox: '.intro-nav-wrap .chapter-startEditing',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { reveal('.ideditor'); }
-	            }
-	        );
+	      return chars;
 	    }
+	  }
+	  /*
+	   * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/LexicalHandler.html
+	   * used method of org.xml.sax.ext.LexicalHandler:
+	   *  #comment(chars, start, length)
+	   *  #startCDATA()
+	   *  #endCDATA()
+	   *  #startDTD(name, publicId, systemId)
+	   *
+	   *
+	   * IGNORED method of org.xml.sax.ext.LexicalHandler:
+	   *  #endDTD()
+	   *  #startEntity(name)
+	   *  #endEntity(name)
+	   *
+	   *
+	   * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/DeclHandler.html
+	   * IGNORED method of org.xml.sax.ext.DeclHandler
+	   * 	#attributeDecl(eName, aName, type, mode, value)
+	   *  #elementDecl(name, model)
+	   *  #externalEntityDecl(name, publicId, systemId)
+	   *  #internalEntityDecl(name, value)
+	   * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/EntityResolver2.html
+	   * IGNORED method of org.xml.sax.EntityResolver2
+	   *  #resolveEntity(String name,String publicId,String baseURI,String systemId)
+	   *  #resolveEntity(publicId, systemId)
+	   *  #getExternalSubset(name, baseURI)
+	   * @link http://www.saxproject.org/apidoc/org/xml/sax/DTDHandler.html
+	   * IGNORED method of org.xml.sax.DTDHandler
+	   *  #notationDecl(name, publicId, systemId) {};
+	   *  #unparsedEntityDecl(name, publicId, systemId, notationName) {};
+	   */
 
 
-	    chapter.enter = function() {
-	        addHouse();
+	  "endDTD,startEntity,endEntity,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,resolveEntity,getExternalSubset,notationDecl,unparsedEntityDecl".replace(/\w+/g, function (key) {
+	    DOMHandler.prototype[key] = function () {
+	      return null;
 	    };
+	  });
+	  /* Private static helpers treated below as private instance methods, so don't need to add these to the public API; we might use a Relator to also get rid of non-standard public properties */
 
-
-	    chapter.exit = function() {
-	        timeouts.forEach(window.clearTimeout);
-	        context.on('enter.intro exit.intro', null);
-	        context.map().on('move.intro drawn.intro', null);
-	        context.history().on('change.intro', null);
-	        context.container().select('.inspector-wrap').on('wheel.intro', null);
-	        context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-	        context.container().select('.more-fields .combobox-input').on('click.intro', null);
-	    };
+	  function appendElement(hander, node) {
+	    if (!hander.currentElement) {
+	      hander.doc.appendChild(node);
+	    } else {
+	      hander.currentElement.appendChild(node);
+	    }
+	  } //appendChild and setAttributeNS are preformance key
+	  //if(typeof require == 'function'){
 
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	  var XMLReader = sax.XMLReader;
+	  var DOMImplementation = exports.DOMImplementation = dom.DOMImplementation;
+	  exports.XMLSerializer = dom.XMLSerializer;
+	  exports.DOMParser = DOMParser; //}
+	});
 
+	var togeojson = createCommonjsModule(function (module, exports) {
+	  var toGeoJSON = function () {
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	    var removeSpace = /\s*/g,
+	        trimSpace = /^\s*|\s*$/g,
+	        splitSpace = /\s+/; // generate a short, numeric hash of a string
 
-	function uiIntroStartEditing(context, reveal) {
-	    var dispatch$1 = dispatch('done', 'startEditing');
-	    var modalSelection = select(null);
+	    function okhash(x) {
+	      if (!x || !x.length) return 0;
 
+	      for (var i = 0, h = 0; i < x.length; i++) {
+	        h = (h << 5) - h + x.charCodeAt(i) | 0;
+	      }
 
-	    var chapter = {
-	        title: 'intro.startediting.title'
-	    };
+	      return h;
+	    } // all Y children of X
 
-	    function showHelp() {
-	        reveal('.map-control.help-control',
-	            helpString('intro.startediting.help'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { shortcuts(); }
-	            }
-	        );
-	    }
 
-	    function shortcuts() {
-	        reveal('.map-control.help-control',
-	            helpString('intro.startediting.shortcuts'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { showSave(); }
-	            }
-	        );
+	    function get(x, y) {
+	      return x.getElementsByTagName(y);
 	    }
 
-	    function showSave() {
-	        context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
-	        reveal('.top-toolbar button.save',
-	            helpString('intro.startediting.save'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { showStart(); }
-	            }
-	        );
+	    function attr(x, y) {
+	      return x.getAttribute(y);
 	    }
 
-	    function showStart() {
-	        context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
-
-	        modalSelection = uiModal(context.container());
+	    function attrf(x, y) {
+	      return parseFloat(attr(x, y));
+	    } // one Y child of X, if any, otherwise null
 
-	        modalSelection.select('.modal')
-	            .attr('class', 'modal-splash modal');
 
-	        modalSelection.selectAll('.close').remove();
+	    function get1(x, y) {
+	      var n = get(x, y);
+	      return n.length ? n[0] : null;
+	    } // https://developer.mozilla.org/en-US/docs/Web/API/Node.normalize
 
-	        var startbutton = modalSelection.select('.content')
-	            .attr('class', 'fillL')
-	            .append('button')
-	                .attr('class', 'modal-section huge-modal-button')
-	                .on('click', function() {
-	                    modalSelection.remove();
-	                });
 
-	            startbutton
-	                .append('svg')
-	                .attr('class', 'illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-logo-walkthrough');
+	    function norm(el) {
+	      if (el.normalize) {
+	        el.normalize();
+	      }
 
-	            startbutton
-	                .append('h2')
-	                .text(_t('intro.startediting.start'));
+	      return el;
+	    } // cast array x into numbers
 
-	        dispatch$1.call('startEditing');
-	    }
 
+	    function numarray(x) {
+	      for (var j = 0, o = []; j < x.length; j++) {
+	        o[j] = parseFloat(x[j]);
+	      }
 
-	    chapter.enter = function() {
-	        showHelp();
-	    };
+	      return o;
+	    } // get the content of a text node, if any
 
 
-	    chapter.exit = function() {
-	        modalSelection.remove();
-	        context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
-	    };
+	    function nodeVal(x) {
+	      if (x) {
+	        norm(x);
+	      }
 
+	      return x && x.textContent || '';
+	    } // get the contents of multiple text nodes, if present
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
 
-	var chapterUi = {
-	  welcome: uiIntroWelcome,
-	  navigation: uiIntroNavigation,
-	  point: uiIntroPoint,
-	  area: uiIntroArea,
-	  line: uiIntroLine,
-	  building: uiIntroBuilding,
-	  startEditing: uiIntroStartEditing
-	};
+	    function getMulti(x, ys) {
+	      var o = {},
+	          n,
+	          k;
 
-	var chapterFlow = [
-	  'welcome',
-	  'navigation',
-	  'point',
-	  'area',
-	  'line',
-	  'building',
-	  'startEditing'
-	];
+	      for (k = 0; k < ys.length; k++) {
+	        n = get1(x, ys[k]);
+	        if (n) o[ys[k]] = nodeVal(n);
+	      }
 
+	      return o;
+	    } // add properties of Y to X, overwriting if present in both
 
-	function uiIntro(context) {
-	  var INTRO_IMAGERY = 'EsriWorldImageryClarity';
-	  var _introGraph = {};
-	  var _currChapter;
 
+	    function extend(x, y) {
+	      for (var k in y) {
+	        x[k] = y[k];
+	      }
+	    } // get one coordinate from a coordinate array, if any
 
-	  function intro(selection) {
-	    _mainFileFetcher.get('intro_graph')
-	      .then(function (dataIntroGraph) {
-	        // create entities for intro graph and localize names
-	        for (var id in dataIntroGraph) {
-	          if (!_introGraph[id]) {
-	            _introGraph[id] = osmEntity(localize(dataIntroGraph[id]));
-	          }
-	        }
-	        selection.call(startIntro);
-	      })
-	      .catch(function() { /* ignore */ });
-	  }
 
+	    function coord1(v) {
+	      return numarray(v.replace(removeSpace, '').split(','));
+	    } // get all coordinates from a coordinate array as [[],[]]
 
-	  function startIntro(selection) {
-	    context.enter(modeBrowse(context));
 
-	    // Save current map state
-	    var osm = context.connection();
-	    var history = context.history().toJSON();
-	    var hash = window.location.hash;
-	    var center = context.map().center();
-	    var zoom = context.map().zoom();
-	    var background = context.background().baseLayerSource();
-	    var overlays = context.background().overlayLayerSources();
-	    var opacity = context.container().selectAll('.main-map .layer-background').style('opacity');
-	    var caches = osm && osm.caches();
-	    var baseEntities = context.history().graph().base().entities;
+	    function coord(v) {
+	      var coords = v.replace(trimSpace, '').split(splitSpace),
+	          o = [];
 
-	    // Show sidebar and disable the sidebar resizing button
-	    // (this needs to be before `context.inIntro(true)`)
-	    context.ui().sidebar.expand();
-	    context.container().selectAll('button.sidebar-toggle').classed('disabled', true);
+	      for (var i = 0; i < coords.length; i++) {
+	        o.push(coord1(coords[i]));
+	      }
 
-	    // Block saving
-	    context.inIntro(true);
+	      return o;
+	    }
 
-	    // Load semi-real data used in intro
-	    if (osm) { osm.toggle(false).reset(); }
-	    context.history().reset();
-	    context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
-	    context.history().checkpoint('initial');
+	    function coordPair(x) {
+	      var ll = [attrf(x, 'lon'), attrf(x, 'lat')],
+	          ele = get1(x, 'ele'),
+	          // handle namespaced attribute in browser
+	      heartRate = get1(x, 'gpxtpx:hr') || get1(x, 'hr'),
+	          time = get1(x, 'time'),
+	          e;
 
-	    // Setup imagery
-	    var imagery = context.background().findSource(INTRO_IMAGERY);
-	    if (imagery) {
-	      context.background().baseLayerSource(imagery);
-	    } else {
-	      context.background().bing();
-	    }
-	    overlays.forEach(function (d) { return context.background().toggleOverlayLayer(d); });
+	      if (ele) {
+	        e = parseFloat(nodeVal(ele));
 
-	    // Setup data layers (only OSM)
-	    var layers = context.layers();
-	    layers.all().forEach(function (item) {
-	      // if the layer has the function `enabled`
-	      if (typeof item.layer.enabled === 'function') {
-	        item.layer.enabled(item.id === 'osm');
+	        if (!isNaN(e)) {
+	          ll.push(e);
+	        }
 	      }
-	    });
 
+	      return {
+	        coordinates: ll,
+	        time: time ? nodeVal(time) : null,
+	        heartRate: heartRate ? parseFloat(nodeVal(heartRate)) : null
+	      };
+	    } // create a new feature collection parent object
 
-	    context.container().selectAll('.main-map .layer-background').style('opacity', 1);
 
-	    var curtain = uiCurtain(context.container().node());
-	    selection.call(curtain);
+	    function fc() {
+	      return {
+	        type: 'FeatureCollection',
+	        features: []
+	      };
+	    }
 
-	    // Store that the user started the walkthrough..
-	    corePreferences('walkthrough_started', 'yes');
+	    var serializer;
 
-	    // Restore previous walkthrough progress..
-	    var storedProgress = corePreferences('walkthrough_progress') || '';
-	    var progress = storedProgress.split(';').filter(Boolean);
+	    if (typeof XMLSerializer !== 'undefined') {
+	      /* istanbul ignore next */
+	      serializer = new XMLSerializer(); // only require xmldom in a node environment
+	    } else if ( (typeof process === "undefined" ? "undefined" : _typeof(process)) === 'object' && !process.browser) {
+	      serializer = new domParser.XMLSerializer();
+	    }
 
-	    var chapters = chapterFlow.map(function (chapter, i) {
-	      var s = chapterUi[chapter](context, curtain.reveal)
-	        .on('done', function () {
+	    function xml2str(str) {
+	      // IE9 will create a new XMLSerializer but it'll crash immediately.
+	      // This line is ignored because we don't run coverage tests in IE9
 
-	          buttons
-	            .filter(function (d) { return d.title === s.title; })
-	            .classed('finished', true);
+	      /* istanbul ignore next */
+	      if (str.xml !== undefined) return str.xml;
+	      return serializer.serializeToString(str);
+	    }
 
-	          if (i < chapterFlow.length - 1) {
-	            var next = chapterFlow[i + 1];
-	            context.container().select(("button.chapter-" + next))
-	              .classed('next', true);
+	    var t = {
+	      kml: function kml(doc) {
+	        var gj = fc(),
+	            // styleindex keeps track of hashed styles in order to match features
+	        styleIndex = {},
+	            styleByHash = {},
+	            // stylemapindex keeps track of style maps to expose in properties
+	        styleMapIndex = {},
+	            // atomic geospatial types supported by KML - MultiGeometry is
+	        // handled separately
+	        geotypes = ['Polygon', 'LineString', 'Point', 'Track', 'gx:Track'],
+	            // all root placemarks in the file
+	        placemarks = get(doc, 'Placemark'),
+	            styles = get(doc, 'Style'),
+	            styleMaps = get(doc, 'StyleMap');
+
+	        for (var k = 0; k < styles.length; k++) {
+	          var hash = okhash(xml2str(styles[k])).toString(16);
+	          styleIndex['#' + attr(styles[k], 'id')] = hash;
+	          styleByHash[hash] = styles[k];
+	        }
+
+	        for (var l = 0; l < styleMaps.length; l++) {
+	          styleIndex['#' + attr(styleMaps[l], 'id')] = okhash(xml2str(styleMaps[l])).toString(16);
+	          var pairs = get(styleMaps[l], 'Pair');
+	          var pairsMap = {};
+
+	          for (var m = 0; m < pairs.length; m++) {
+	            pairsMap[nodeVal(get1(pairs[m], 'key'))] = nodeVal(get1(pairs[m], 'styleUrl'));
 	          }
 
-	          // Store walkthrough progress..
-	          progress.push(chapter);
-	          corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
-	        });
-	      return s;
-	    });
-
-	    chapters[chapters.length - 1].on('startEditing', function () {
-	      // Store walkthrough progress..
-	      progress.push('startEditing');
-	      corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
-
-	      // Store if walkthrough is completed..
-	      var incomplete = utilArrayDifference(chapterFlow, progress);
-	      if (!incomplete.length) {
-	        corePreferences('walkthrough_completed', 'yes');
-	      }
+	          styleMapIndex['#' + attr(styleMaps[l], 'id')] = pairsMap;
+	        }
 
-	      curtain.remove();
-	      navwrap.remove();
-	      context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
-	      context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
-	      if (osm) { osm.toggle(true).reset().caches(caches); }
-	      context.history().reset().merge(Object.values(baseEntities));
-	      context.background().baseLayerSource(background);
-	      overlays.forEach(function (d) { return context.background().toggleOverlayLayer(d); });
-	      if (history) { context.history().fromJSON(history, false); }
-	      context.map().centerZoom(center, zoom);
-	      window.location.replace(hash);
-	      context.inIntro(false);
-	    });
+	        for (var j = 0; j < placemarks.length; j++) {
+	          gj.features = gj.features.concat(getPlacemark(placemarks[j]));
+	        }
 
-	    var navwrap = selection
-	      .append('div')
-	      .attr('class', 'intro-nav-wrap fillD');
+	        function kmlColor(v) {
+	          var color, opacity;
+	          v = v || '';
 
-	    navwrap
-	      .append('svg')
-	      .attr('class', 'intro-nav-wrap-logo')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-walkthrough');
+	          if (v.substr(0, 1) === '#') {
+	            v = v.substr(1);
+	          }
 
-	    var buttonwrap = navwrap
-	      .append('div')
-	      .attr('class', 'joined')
-	      .selectAll('button.chapter');
+	          if (v.length === 6 || v.length === 3) {
+	            color = v;
+	          }
 
-	    var buttons = buttonwrap
-	      .data(chapters)
-	      .enter()
-	      .append('button')
-	      .attr('class', function (d, i) { return ("chapter chapter-" + (chapterFlow[i])); })
-	      .on('click', enterChapter);
+	          if (v.length === 8) {
+	            opacity = parseInt(v.substr(0, 2), 16) / 255;
+	            color = '#' + v.substr(6, 2) + v.substr(4, 2) + v.substr(2, 2);
+	          }
 
-	    buttons
-	      .append('span')
-	      .text(function (d) { return _t(d.title); });
+	          return [color, isNaN(opacity) ? undefined : opacity];
+	        }
 
-	    buttons
-	      .append('span')
-	      .attr('class', 'status')
-	      .call(svgIcon((_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'));
+	        function gxCoord(v) {
+	          return numarray(v.split(' '));
+	        }
 
-	    enterChapter(chapters[0]);
+	        function gxCoords(root) {
+	          var elems = get(root, 'coord'),
+	              coords = [],
+	              times = [];
+	          if (elems.length === 0) elems = get(root, 'gx:coord');
 
+	          for (var i = 0; i < elems.length; i++) {
+	            coords.push(gxCoord(nodeVal(elems[i])));
+	          }
 
-	    function enterChapter(newChapter) {
-	      if (_currChapter) { _currChapter.exit(); }
-	      context.enter(modeBrowse(context));
+	          var timeElems = get(root, 'when');
 
-	      _currChapter = newChapter;
-	      _currChapter.enter();
+	          for (var j = 0; j < timeElems.length; j++) {
+	            times.push(nodeVal(timeElems[j]));
+	          }
 
-	      buttons
-	        .classed('next', false)
-	        .classed('active', function (d) { return d.title === _currChapter.title; });
-	    }
-	  }
+	          return {
+	            coords: coords,
+	            times: times
+	          };
+	        }
 
+	        function getGeometry(root) {
+	          var geomNode,
+	              geomNodes,
+	              i,
+	              j,
+	              k,
+	              geoms = [],
+	              coordTimes = [];
 
-	  return intro;
-	}
+	          if (get1(root, 'MultiGeometry')) {
+	            return getGeometry(get1(root, 'MultiGeometry'));
+	          }
 
-	function uiIssuesInfo(context) {
+	          if (get1(root, 'MultiTrack')) {
+	            return getGeometry(get1(root, 'MultiTrack'));
+	          }
 
-	    var warningsItem = {
-	        id: 'warnings',
-	        count: 0,
-	        iconID: 'iD-icon-alert',
-	        descriptionID: 'issues.warnings_and_errors'
-	    };
+	          if (get1(root, 'gx:MultiTrack')) {
+	            return getGeometry(get1(root, 'gx:MultiTrack'));
+	          }
 
-	    var resolvedItem = {
-	        id: 'resolved',
-	        count: 0,
-	        iconID: 'iD-icon-apply',
-	        descriptionID: 'issues.user_resolved_issues'
-	    };
+	          for (i = 0; i < geotypes.length; i++) {
+	            geomNodes = get(root, geotypes[i]);
 
-	    function update(selection) {
+	            if (geomNodes) {
+	              for (j = 0; j < geomNodes.length; j++) {
+	                geomNode = geomNodes[j];
 
-	        var shownItems = [];
+	                if (geotypes[i] === 'Point') {
+	                  geoms.push({
+	                    type: 'Point',
+	                    coordinates: coord1(nodeVal(get1(geomNode, 'coordinates')))
+	                  });
+	                } else if (geotypes[i] === 'LineString') {
+	                  geoms.push({
+	                    type: 'LineString',
+	                    coordinates: coord(nodeVal(get1(geomNode, 'coordinates')))
+	                  });
+	                } else if (geotypes[i] === 'Polygon') {
+	                  var rings = get(geomNode, 'LinearRing'),
+	                      coords = [];
 
-	        var liveIssues = context.validator().getIssues({
-	            what: corePreferences('validate-what') || 'edited',
-	            where: corePreferences('validate-where') || 'all'
-	        });
-	        if (liveIssues.length) {
-	            warningsItem.count = liveIssues.length;
-	            shownItems.push(warningsItem);
-	        }
+	                  for (k = 0; k < rings.length; k++) {
+	                    coords.push(coord(nodeVal(get1(rings[k], 'coordinates'))));
+	                  }
 
-	        if (corePreferences('validate-what') === 'all') {
-	            var resolvedIssues = context.validator().getResolvedIssues();
-	            if (resolvedIssues.length) {
-	                resolvedItem.count = resolvedIssues.length;
-	                shownItems.push(resolvedItem);
+	                  geoms.push({
+	                    type: 'Polygon',
+	                    coordinates: coords
+	                  });
+	                } else if (geotypes[i] === 'Track' || geotypes[i] === 'gx:Track') {
+	                  var track = gxCoords(geomNode);
+	                  geoms.push({
+	                    type: 'LineString',
+	                    coordinates: track.coords
+	                  });
+	                  if (track.times.length) coordTimes.push(track.times);
+	                }
+	              }
 	            }
-	        }
-
-	        var chips = selection.selectAll('.chip')
-	            .data(shownItems, function(d) {
-	                return d.id;
-	            });
-
-	        chips.exit().remove();
+	          }
 
-	        var enter = chips.enter()
-	            .append('a')
-	            .attr('class', function(d) {
-	                return 'chip ' + d.id + '-count';
-	            })
-	            .attr('href', '#')
-	            .attr('tabindex', -1)
-	            .each(function(d) {
+	          return {
+	            geoms: geoms,
+	            coordTimes: coordTimes
+	          };
+	        }
 
-	                var chipSelection = select(this);
+	        function getPlacemark(root) {
+	          var geomsAndTimes = getGeometry(root),
+	              i,
+	              properties = {},
+	              name = nodeVal(get1(root, 'name')),
+	              address = nodeVal(get1(root, 'address')),
+	              styleUrl = nodeVal(get1(root, 'styleUrl')),
+	              description = nodeVal(get1(root, 'description')),
+	              timeSpan = get1(root, 'TimeSpan'),
+	              timeStamp = get1(root, 'TimeStamp'),
+	              extendedData = get1(root, 'ExtendedData'),
+	              lineStyle = get1(root, 'LineStyle'),
+	              polyStyle = get1(root, 'PolyStyle'),
+	              visibility = get1(root, 'visibility');
+	          if (!geomsAndTimes.geoms.length) return [];
+	          if (name) properties.name = name;
+	          if (address) properties.address = address;
 
-	                var tooltipBehavior = uiTooltip()
-	                    .placement('top')
-	                    .title(_t(d.descriptionID));
+	          if (styleUrl) {
+	            if (styleUrl[0] !== '#') {
+	              styleUrl = '#' + styleUrl;
+	            }
 
-	                chipSelection
-	                    .call(tooltipBehavior)
-	                    .on('click', function() {
-	                        event.preventDefault();
+	            properties.styleUrl = styleUrl;
 
-	                        tooltipBehavior.hide(select(this));
-	                        // open the Issues pane
-	                        context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
-	                    });
+	            if (styleIndex[styleUrl]) {
+	              properties.styleHash = styleIndex[styleUrl];
+	            }
 
-	                chipSelection.call(svgIcon('#' + d.iconID));
+	            if (styleMapIndex[styleUrl]) {
+	              properties.styleMapHash = styleMapIndex[styleUrl];
+	              properties.styleHash = styleIndex[styleMapIndex[styleUrl].normal];
+	            } // Try to populate the lineStyle or polyStyle since we got the style hash
 
-	            });
 
-	        enter.append('span')
-	            .attr('class', 'count');
+	            var style = styleByHash[properties.styleHash];
 
-	        enter.merge(chips)
-	            .selectAll('span.count')
-	            .text(function(d) {
-	                return d.count.toString();
-	            });
-	    }
+	            if (style) {
+	              if (!lineStyle) lineStyle = get1(style, 'LineStyle');
+	              if (!polyStyle) polyStyle = get1(style, 'PolyStyle');
+	            }
+	          }
 
+	          if (description) properties.description = description;
 
-	    return function(selection) {
-	        update(selection);
+	          if (timeSpan) {
+	            var begin = nodeVal(get1(timeSpan, 'begin'));
+	            var end = nodeVal(get1(timeSpan, 'end'));
+	            properties.timespan = {
+	              begin: begin,
+	              end: end
+	            };
+	          }
 
-	        context.validator().on('validated.infobox', function() {
-	            update(selection);
-	        });
-	    };
-	}
+	          if (timeStamp) {
+	            properties.timestamp = nodeVal(get1(timeStamp, 'when'));
+	          }
 
-	// import { utilGetDimensions } from '../util/dimensions';
+	          if (lineStyle) {
+	            var linestyles = kmlColor(nodeVal(get1(lineStyle, 'color'))),
+	                color = linestyles[0],
+	                opacity = linestyles[1],
+	                width = parseFloat(nodeVal(get1(lineStyle, 'width')));
+	            if (color) properties.stroke = color;
+	            if (!isNaN(opacity)) properties['stroke-opacity'] = opacity;
+	            if (!isNaN(width)) properties['stroke-width'] = width;
+	          }
 
+	          if (polyStyle) {
+	            var polystyles = kmlColor(nodeVal(get1(polyStyle, 'color'))),
+	                pcolor = polystyles[0],
+	                popacity = polystyles[1],
+	                fill = nodeVal(get1(polyStyle, 'fill')),
+	                outline = nodeVal(get1(polyStyle, 'outline'));
+	            if (pcolor) properties.fill = pcolor;
+	            if (!isNaN(popacity)) properties['fill-opacity'] = popacity;
+	            if (fill) properties['fill-opacity'] = fill === '1' ? properties['fill-opacity'] || 1 : 0;
+	            if (outline) properties['stroke-opacity'] = outline === '1' ? properties['stroke-opacity'] || 1 : 0;
+	          }
 
-	function uiMapInMap(context) {
+	          if (extendedData) {
+	            var datas = get(extendedData, 'Data'),
+	                simpleDatas = get(extendedData, 'SimpleData');
 
-	    function mapInMap(selection) {
-	        var backgroundLayer = rendererTileLayer(context);
-	        var overlayLayers = {};
-	        var projection = geoRawMercator();
-	        var dataLayer = svgData(projection, context).showLabels(false);
-	        var debugLayer = svgDebug(projection, context);
-	        var zoom = d3_zoom()
-	            .scaleExtent([geoZoomToScale(0.5), geoZoomToScale(24)])
-	            .on('start', zoomStarted)
-	            .on('zoom', zoomed)
-	            .on('end', zoomEnded);
-
-	        var wrap = select(null);
-	        var tiles = select(null);
-	        var viewport = select(null);
-
-	        var _isTransformed = false;
-	        var _isHidden = true;
-	        var _skipEvents = false;
-	        var _gesture = null;
-	        var _zDiff = 6;    // by default, minimap renders at (main zoom - 6)
-	        var _dMini;        // dimensions of minimap
-	        var _cMini;        // center pixel of minimap
-	        var _tStart;       // transform at start of gesture
-	        var _tCurr;        // transform at most recent event
-	        var _timeoutID;
-
-
-	        function zoomStarted() {
-	            if (_skipEvents) { return; }
-	            _tStart = _tCurr = projection.transform();
-	            _gesture = null;
-	        }
-
-
-	        function zoomed() {
-	            if (_skipEvents) { return; }
-
-	            var x = event.transform.x;
-	            var y = event.transform.y;
-	            var k = event.transform.k;
-	            var isZooming = (k !== _tStart.k);
-	            var isPanning = (x !== _tStart.x || y !== _tStart.y);
-
-	            if (!isZooming && !isPanning) {
-	                return;  // no change
+	            for (i = 0; i < datas.length; i++) {
+	              properties[datas[i].getAttribute('name')] = nodeVal(get1(datas[i], 'value'));
 	            }
 
-	            // lock in either zooming or panning, don't allow both in minimap.
-	            if (!_gesture) {
-	                _gesture = isZooming ? 'zoom' : 'pan';
+	            for (i = 0; i < simpleDatas.length; i++) {
+	              properties[simpleDatas[i].getAttribute('name')] = nodeVal(simpleDatas[i]);
 	            }
+	          }
 
-	            var tMini = projection.transform();
-	            var tX, tY, scale;
-
-	            if (_gesture === 'zoom') {
-	                scale = k / tMini.k;
-	                tX = (_cMini[0] / scale - _cMini[0]) * scale;
-	                tY = (_cMini[1] / scale - _cMini[1]) * scale;
-	            } else {
-	                k = tMini.k;
-	                scale = 1;
-	                tX = x - tMini.x;
-	                tY = y - tMini.y;
-	            }
+	          if (visibility) {
+	            properties.visibility = nodeVal(visibility);
+	          }
 
-	            utilSetTransform(tiles, tX, tY, scale);
-	            utilSetTransform(viewport, 0, 0, scale);
-	            _isTransformed = true;
-	            _tCurr = identity$2.translate(x, y).scale(k);
+	          if (geomsAndTimes.coordTimes.length) {
+	            properties.coordTimes = geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes;
+	          }
 
-	            var zMain = geoScaleToZoom(context.projection.scale());
-	            var zMini = geoScaleToZoom(k);
+	          var feature = {
+	            type: 'Feature',
+	            geometry: geomsAndTimes.geoms.length === 1 ? geomsAndTimes.geoms[0] : {
+	              type: 'GeometryCollection',
+	              geometries: geomsAndTimes.geoms
+	            },
+	            properties: properties
+	          };
+	          if (attr(root, 'id')) feature.id = attr(root, 'id');
+	          return [feature];
+	        }
 
-	            _zDiff = zMain - zMini;
+	        return gj;
+	      },
+	      gpx: function gpx(doc) {
+	        var i,
+	            tracks = get(doc, 'trk'),
+	            routes = get(doc, 'rte'),
+	            waypoints = get(doc, 'wpt'),
+	            // a feature collection
+	        gj = fc(),
+	            feature;
+
+	        for (i = 0; i < tracks.length; i++) {
+	          feature = getTrack(tracks[i]);
+	          if (feature) gj.features.push(feature);
+	        }
+
+	        for (i = 0; i < routes.length; i++) {
+	          feature = getRoute(routes[i]);
+	          if (feature) gj.features.push(feature);
+	        }
+
+	        for (i = 0; i < waypoints.length; i++) {
+	          gj.features.push(getPoint(waypoints[i]));
+	        }
+
+	        function getPoints(node, pointname) {
+	          var pts = get(node, pointname),
+	              line = [],
+	              times = [],
+	              heartRates = [],
+	              l = pts.length;
+	          if (l < 2) return {}; // Invalid line in GeoJSON
+
+	          for (var i = 0; i < l; i++) {
+	            var c = coordPair(pts[i]);
+	            line.push(c.coordinates);
+	            if (c.time) times.push(c.time);
+	            if (c.heartRate) heartRates.push(c.heartRate);
+	          }
 
-	            queueRedraw();
+	          return {
+	            line: line,
+	            times: times,
+	            heartRates: heartRates
+	          };
 	        }
 
+	        function getTrack(node) {
+	          var segments = get(node, 'trkseg'),
+	              track = [],
+	              times = [],
+	              heartRates = [],
+	              line;
 
-	        function zoomEnded() {
-	            if (_skipEvents) { return; }
-	            if (_gesture !== 'pan') { return; }
+	          for (var i = 0; i < segments.length; i++) {
+	            line = getPoints(segments[i], 'trkpt');
 
-	            updateProjection();
-	            _gesture = null;
-	            context.map().center(projection.invert(_cMini));   // recenter main map..
-	        }
+	            if (line) {
+	              if (line.line) track.push(line.line);
+	              if (line.times && line.times.length) times.push(line.times);
+	              if (line.heartRates && line.heartRates.length) heartRates.push(line.heartRates);
+	            }
+	          }
 
+	          if (track.length === 0) return;
+	          var properties = getProperties(node);
+	          extend(properties, getLineStyle(get1(node, 'extensions')));
+	          if (times.length) properties.coordTimes = track.length === 1 ? times[0] : times;
+	          if (heartRates.length) properties.heartRates = track.length === 1 ? heartRates[0] : heartRates;
+	          return {
+	            type: 'Feature',
+	            properties: properties,
+	            geometry: {
+	              type: track.length === 1 ? 'LineString' : 'MultiLineString',
+	              coordinates: track.length === 1 ? track[0] : track
+	            }
+	          };
+	        }
 
-	        function updateProjection() {
-	            var loc = context.map().center();
-	            var tMain = context.projection.transform();
-	            var zMain = geoScaleToZoom(tMain.k);
-	            var zMini = Math.max(zMain - _zDiff, 0.5);
-	            var kMini = geoZoomToScale(zMini);
+	        function getRoute(node) {
+	          var line = getPoints(node, 'rtept');
+	          if (!line.line) return;
+	          var prop = getProperties(node);
+	          extend(prop, getLineStyle(get1(node, 'extensions')));
+	          var routeObj = {
+	            type: 'Feature',
+	            properties: prop,
+	            geometry: {
+	              type: 'LineString',
+	              coordinates: line.line
+	            }
+	          };
+	          return routeObj;
+	        }
 
-	            projection
-	                .translate([tMain.x, tMain.y])
-	                .scale(kMini);
+	        function getPoint(node) {
+	          var prop = getProperties(node);
+	          extend(prop, getMulti(node, ['sym']));
+	          return {
+	            type: 'Feature',
+	            properties: prop,
+	            geometry: {
+	              type: 'Point',
+	              coordinates: coordPair(node).coordinates
+	            }
+	          };
+	        }
 
-	            var point = projection(loc);
-	            var mouse = (_gesture === 'pan') ? geoVecSubtract([_tCurr.x, _tCurr.y], [_tStart.x, _tStart.y]) : [0, 0];
-	            var xMini = _cMini[0] - point[0] + tMain.x + mouse[0];
-	            var yMini = _cMini[1] - point[1] + tMain.y + mouse[1];
+	        function getLineStyle(extensions) {
+	          var style = {};
 
-	            projection
-	                .translate([xMini, yMini])
-	                .clipExtent([[0, 0], _dMini]);
+	          if (extensions) {
+	            var lineStyle = get1(extensions, 'line');
 
-	            _tCurr = projection.transform();
+	            if (lineStyle) {
+	              var color = nodeVal(get1(lineStyle, 'color')),
+	                  opacity = parseFloat(nodeVal(get1(lineStyle, 'opacity'))),
+	                  width = parseFloat(nodeVal(get1(lineStyle, 'width')));
+	              if (color) style.stroke = color;
+	              if (!isNaN(opacity)) style['stroke-opacity'] = opacity; // GPX width is in mm, convert to px with 96 px per inch
 
-	            if (_isTransformed) {
-	                utilSetTransform(tiles, 0, 0);
-	                utilSetTransform(viewport, 0, 0);
-	                _isTransformed = false;
+	              if (!isNaN(width)) style['stroke-width'] = width * 96 / 25.4;
 	            }
+	          }
 
-	            zoom
-	                .scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
-
-	            _skipEvents = true;
-	            wrap.call(zoom.transform, _tCurr);
-	            _skipEvents = false;
+	          return style;
 	        }
 
+	        function getProperties(node) {
+	          var prop = getMulti(node, ['name', 'cmt', 'desc', 'type', 'time', 'keywords']),
+	              links = get(node, 'link');
+	          if (links.length) prop.links = [];
 
-	        function redraw() {
-	            clearTimeout(_timeoutID);
-	            if (_isHidden) { return; }
+	          for (var i = 0, link; i < links.length; i++) {
+	            link = {
+	              href: attr(links[i], 'href')
+	            };
+	            extend(link, getMulti(links[i], ['text', 'type']));
+	            prop.links.push(link);
+	          }
 
-	            updateProjection();
-	            var zMini = geoScaleToZoom(projection.scale());
+	          return prop;
+	        }
 
-	            // setup tile container
-	            tiles = wrap
-	                .selectAll('.map-in-map-tiles')
-	                .data([0]);
+	        return gj;
+	      }
+	    };
+	    return t;
+	  }();
 
-	            tiles = tiles.enter()
-	                .append('div')
-	                .attr('class', 'map-in-map-tiles')
-	                .merge(tiles);
+	  module.exports = toGeoJSON;
+	});
 
-	            // redraw background
-	            backgroundLayer
-	                .source(context.background().baseLayerSource())
-	                .projection(projection)
-	                .dimensions(_dMini);
+	var _initialized = false;
+	var _enabled = false;
 
-	            var background = tiles
-	                .selectAll('.map-in-map-background')
-	                .data([0]);
+	var _geojson;
 
-	            background.enter()
-	                .append('div')
-	                .attr('class', 'map-in-map-background')
-	                .merge(background)
-	                .call(backgroundLayer);
+	function svgData(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
+	  var _showLabels = true;
+	  var detected = utilDetect();
+	  var layer = select(null);
 
-	            // redraw overlay
-	            var overlaySources = context.background().overlayLayerSources();
-	            var activeOverlayLayers = [];
-	            for (var i = 0; i < overlaySources.length; i++) {
-	                if (overlaySources[i].validZoom(zMini)) {
-	                    if (!overlayLayers[i]) { overlayLayers[i] = rendererTileLayer(context); }
-	                    activeOverlayLayers.push(overlayLayers[i]
-	                        .source(overlaySources[i])
-	                        .projection(projection)
-	                        .dimensions(_dMini));
-	                }
-	            }
+	  var _vtService;
 
-	            var overlay = tiles
-	                .selectAll('.map-in-map-overlay')
-	                .data([0]);
+	  var _fileList;
 
-	            overlay = overlay.enter()
-	                .append('div')
-	                .attr('class', 'map-in-map-overlay')
-	                .merge(overlay);
+	  var _template;
 
+	  var _src;
 
-	            var overlays = overlay
-	                .selectAll('div')
-	                .data(activeOverlayLayers, function(d) { return d.source().name(); });
+	  function init() {
+	    if (_initialized) return; // run once
 
-	            overlays.exit()
-	                .remove();
+	    _geojson = {};
+	    _enabled = true;
 
-	            overlays = overlays.enter()
-	                .append('div')
-	                .merge(overlays)
-	                .each(function(layer) { select(this).call(layer); });
+	    function over(d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      d3_event.dataTransfer.dropEffect = 'copy';
+	    }
 
+	    context.container().attr('dropzone', 'copy').on('drop.svgData', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      if (!detected.filedrop) return;
+	      drawData.fileList(d3_event.dataTransfer.files);
+	    }).on('dragenter.svgData', over).on('dragexit.svgData', over).on('dragover.svgData', over);
+	    _initialized = true;
+	  }
 
-	            var dataLayers = tiles
-	                .selectAll('.map-in-map-data')
-	                .data([0]);
+	  function getService() {
+	    if (services.vectorTile && !_vtService) {
+	      _vtService = services.vectorTile;
 
-	            dataLayers.exit()
-	                .remove();
+	      _vtService.event.on('loadedData', throttledRedraw);
+	    } else if (!services.vectorTile && _vtService) {
+	      _vtService = null;
+	    }
 
-	            dataLayers = dataLayers.enter()
-	                .append('svg')
-	                .attr('class', 'map-in-map-data')
-	                .merge(dataLayers)
-	                .call(dataLayer)
-	                .call(debugLayer);
+	    return _vtService;
+	  }
 
+	  function showLayer() {
+	    layerOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
-	            // redraw viewport bounding box
-	            if (_gesture !== 'pan') {
-	                var getPath = d3_geoPath(projection);
-	                var bbox = { type: 'Polygon', coordinates: [context.map().extent().polygon()] };
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
+	  }
 
-	                viewport = wrap.selectAll('.map-in-map-viewport')
-	                    .data([0]);
+	  function layerOn() {
+	    layer.style('display', 'block');
+	  }
 
-	                viewport = viewport.enter()
-	                    .append('svg')
-	                    .attr('class', 'map-in-map-viewport')
-	                    .merge(viewport);
+	  function layerOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  } // ensure that all geojson features in a collection have IDs
 
 
-	                var path = viewport.selectAll('.map-in-map-bbox')
-	                    .data([bbox]);
+	  function ensureIDs(gj) {
+	    if (!gj) return null;
 
-	                path.enter()
-	                    .append('path')
-	                    .attr('class', 'map-in-map-bbox')
-	                    .merge(path)
-	                    .attr('d', getPath)
-	                    .classed('thick', function(d) { return getPath.area(d) < 30; });
-	            }
-	        }
+	    if (gj.type === 'FeatureCollection') {
+	      for (var i = 0; i < gj.features.length; i++) {
+	        ensureFeatureID(gj.features[i]);
+	      }
+	    } else {
+	      ensureFeatureID(gj);
+	    }
 
+	    return gj;
+	  } // ensure that each single Feature object has a unique ID
 
-	        function queueRedraw() {
-	            clearTimeout(_timeoutID);
-	            _timeoutID = setTimeout(function() { redraw(); }, 750);
-	        }
 
+	  function ensureFeatureID(feature) {
+	    if (!feature) return;
+	    feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
+	    return feature;
+	  } // Prefer an array of Features instead of a FeatureCollection
 
-	        function toggle() {
-	            if (event) { event.preventDefault(); }
 
-	            _isHidden = !_isHidden;
+	  function getFeatures(gj) {
+	    if (!gj) return [];
 
-	            context.container().select('.minimap-toggle-item')
-	                .classed('active', !_isHidden)
-	                .select('input')
-	                .property('checked', !_isHidden);
+	    if (gj.type === 'FeatureCollection') {
+	      return gj.features;
+	    } else {
+	      return [gj];
+	    }
+	  }
 
-	            if (_isHidden) {
-	                wrap
-	                    .style('display', 'block')
-	                    .style('opacity', '1')
-	                    .transition()
-	                    .duration(200)
-	                    .style('opacity', '0')
-	                    .on('end', function() {
-	                        selection.selectAll('.map-in-map')
-	                            .style('display', 'none');
-	                    });
-	            } else {
-	                wrap
-	                    .style('display', 'block')
-	                    .style('opacity', '0')
-	                    .transition()
-	                    .duration(200)
-	                    .style('opacity', '1')
-	                    .on('end', function() {
-	                        redraw();
-	                    });
-	            }
-	        }
+	  function featureKey(d) {
+	    return d.__featurehash__;
+	  }
 
+	  function isPolygon(d) {
+	    return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+	  }
 
-	        uiMapInMap.toggle = toggle;
+	  function clipPathID(d) {
+	    return 'ideditor-data-' + d.__featurehash__ + '-clippath';
+	  }
 
-	        wrap = selection.selectAll('.map-in-map')
-	            .data([0]);
+	  function featureClasses(d) {
+	    return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
+	  }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'map-in-map')
-	            .style('display', (_isHidden ? 'none' : 'block'))
-	            .call(zoom)
-	            .on('dblclick.zoom', null)
-	            .merge(wrap);
-
-	        // reflow warning: Hardcode dimensions - currently can't resize it anyway..
-	        _dMini = [200,150]; //utilGetDimensions(wrap);
-	        _cMini = geoVecScale(_dMini, 0.5);
-
-	        context.map()
-	            .on('drawn.map-in-map', function(drawn) {
-	                if (drawn.full === true) {
-	                    redraw();
-	                }
-	            });
+	  function drawData(selection) {
+	    var vtService = getService();
+	    var getPath = svgPath(projection).geojson;
+	    var getAreaPath = svgPath(projection, null, true).geojson;
+	    var hasData = drawData.hasData();
+	    layer = selection.selectAll('.layer-mapdata').data(_enabled && hasData ? [0] : []);
+	    layer.exit().remove();
+	    layer = layer.enter().append('g').attr('class', 'layer-mapdata').merge(layer);
+	    var surface = context.surface();
+	    if (!surface || surface.empty()) return; // not ready to draw yet, starting up
+	    // Gather data
 
-	        redraw();
+	    var geoData, polygonData;
 
-	        context.keybinding()
-	            .on(_t('background.minimap.key'), toggle);
+	    if (_template && vtService) {
+	      // fetch data from vector tile service
+	      var sourceID = _template;
+	      vtService.loadTiles(sourceID, _template, projection);
+	      geoData = vtService.data(sourceID, projection);
+	    } else {
+	      geoData = getFeatures(_geojson);
+	    }
+
+	    geoData = geoData.filter(getPath);
+	    polygonData = geoData.filter(isPolygon); // Draw clip paths for polygons
+
+	    var clipPaths = surface.selectAll('defs').selectAll('.clipPath-data').data(polygonData, featureKey);
+	    clipPaths.exit().remove();
+	    var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-data').attr('id', clipPathID);
+	    clipPathsEnter.append('path');
+	    clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', getAreaPath); // Draw fill, shadow, stroke layers
+
+	    var datagroups = layer.selectAll('g.datagroup').data(['fill', 'shadow', 'stroke']);
+	    datagroups = datagroups.enter().append('g').attr('class', function (d) {
+	      return 'datagroup datagroup-' + d;
+	    }).merge(datagroups); // Draw paths
+
+	    var pathData = {
+	      fill: polygonData,
+	      shadow: geoData,
+	      stroke: geoData
+	    };
+	    var paths = datagroups.selectAll('path').data(function (layer) {
+	      return pathData[layer];
+	    }, featureKey); // exit
+
+	    paths.exit().remove(); // enter/update
+
+	    paths = paths.enter().append('path').attr('class', function (d) {
+	      var datagroup = this.parentNode.__data__;
+	      return 'pathdata ' + datagroup + ' ' + featureClasses(d);
+	    }).attr('clip-path', function (d) {
+	      var datagroup = this.parentNode.__data__;
+	      return datagroup === 'fill' ? 'url(#' + clipPathID(d) + ')' : null;
+	    }).merge(paths).attr('d', function (d) {
+	      var datagroup = this.parentNode.__data__;
+	      return datagroup === 'fill' ? getAreaPath(d) : getPath(d);
+	    }); // Draw labels
+
+	    layer.call(drawLabels, 'label-halo', geoData).call(drawLabels, 'label', geoData);
+
+	    function drawLabels(selection, textClass, data) {
+	      var labelPath = d3_geoPath(projection);
+	      var labelData = data.filter(function (d) {
+	        return _showLabels && d.properties && (d.properties.desc || d.properties.name);
+	      });
+	      var labels = selection.selectAll('text.' + textClass).data(labelData, featureKey); // exit
+
+	      labels.exit().remove(); // enter/update
+
+	      labels = labels.enter().append('text').attr('class', function (d) {
+	        return textClass + ' ' + featureClasses(d);
+	      }).merge(labels).text(function (d) {
+	        return d.properties.desc || d.properties.name;
+	      }).attr('x', function (d) {
+	        var centroid = labelPath.centroid(d);
+	        return centroid[0] + 11;
+	      }).attr('y', function (d) {
+	        var centroid = labelPath.centroid(d);
+	        return centroid[1];
+	      });
 	    }
+	  }
 
-	    return mapInMap;
-	}
-
-	function uiNotice(context) {
+	  function getExtension(fileName) {
+	    if (!fileName) return;
+	    var re = /\.(gpx|kml|(geo)?json)$/i;
+	    var match = fileName.toLowerCase().match(re);
+	    return match && match.length && match[0];
+	  }
 
-	    return function(selection) {
-	        var div = selection
-	            .append('div')
-	            .attr('class', 'notice');
-
-	        var button = div
-	            .append('button')
-	            .attr('class', 'zoom-to notice fillD')
-	            .on('click', function() {
-	                context.map().zoomEase(context.minEditableZoom());
-	            })
-	            .on('wheel', function() {   // let wheel events pass through #4482
-	                var e2 = new WheelEvent(event.type, event);
-	                context.surface().node().dispatchEvent(e2);
-	            });
+	  function xmlToDom(textdata) {
+	    return new DOMParser().parseFromString(textdata, 'text/xml');
+	  }
 
-	        button
-	            .call(svgIcon('#iD-icon-plus', 'pre-text'))
-	            .append('span')
-	            .attr('class', 'label')
-	            .text(_t('zoom_in_edit'));
+	  drawData.setFile = function (extension, data) {
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null;
+	    var gj;
 
+	    switch (extension) {
+	      case '.gpx':
+	        gj = togeojson.gpx(xmlToDom(data));
+	        break;
 
-	        function disableTooHigh() {
-	            var canEdit = context.map().zoom() >= context.minEditableZoom();
-	            div.style('display', canEdit ? 'none' : 'block');
-	        }
+	      case '.kml':
+	        gj = togeojson.kml(xmlToDom(data));
+	        break;
 
-	        context.map()
-	            .on('move.notice', debounce(disableTooHigh, 500));
+	      case '.geojson':
+	      case '.json':
+	        gj = JSON.parse(data);
+	        break;
+	    }
 
-	        disableTooHigh();
-	    };
-	}
+	    gj = gj || {};
 
-	function uiPhotoviewer(context) {
+	    if (Object.keys(gj).length) {
+	      _geojson = ensureIDs(gj);
+	      _src = extension + ' data file';
+	      this.fitZoom();
+	    }
 
-	    var dispatch$1 = dispatch('resize');
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	  drawData.showLabels = function (val) {
+	    if (!arguments.length) return _showLabels;
+	    _showLabels = val;
+	    return this;
+	  };
 
-	    function photoviewer(selection) {
-	        selection
-	            .append('button')
-	            .attr('class', 'thumb-hide')
-	            .on('click', function () {
-	                if (services.streetside) { services.streetside.hideViewer(context); }
-	                if (services.mapillary) { services.mapillary.hideViewer(context); }
-	                if (services.openstreetcam) { services.openstreetcam.hideViewer(context); }
-	            })
-	            .append('div')
-	            .call(svgIcon('#iD-icon-close'));
-
-	        function preventDefault() {
-	            event.preventDefault();
-	        }
-
-	        selection
-	            .append('button')
-	            .attr('class', 'resize-handle-xy')
-	            .on('touchstart touchdown touchend', preventDefault)
-	            .on(
-	                _pointerPrefix + 'down',
-	                buildResizeListener(selection, 'resize', dispatch$1, { resizeOnX: true, resizeOnY: true })
-	            );
-
-	        selection
-	            .append('button')
-	            .attr('class', 'resize-handle-x')
-	            .on('touchstart touchdown touchend', preventDefault)
-	            .on(
-	                _pointerPrefix + 'down',
-	                buildResizeListener(selection, 'resize', dispatch$1, { resizeOnX: true })
-	            );
-
-	        selection
-	            .append('button')
-	            .attr('class', 'resize-handle-y')
-	            .on('touchstart touchdown touchend', preventDefault)
-	            .on(
-	                _pointerPrefix + 'down',
-	                buildResizeListener(selection, 'resize', dispatch$1, { resizeOnY: true })
-	            );
-
-	        services.streetside.loadViewer(context);
-	        services.mapillary.loadViewer(context);
-	        services.openstreetcam.loadViewer(context);
-
-	        function buildResizeListener(target, eventName, dispatch, options) {
-
-	            var resizeOnX = !!options.resizeOnX;
-	            var resizeOnY = !!options.resizeOnY;
-	            var minHeight = options.minHeight || 240;
-	            var minWidth = options.minWidth || 320;
-	            var pointerId;
-	            var startX;
-	            var startY;
-	            var startWidth;
-	            var startHeight;
-
-	            function startResize() {
-	                if (pointerId !== (event.pointerId || 'mouse')) { return; }
-
-	                event.preventDefault();
-	                event.stopPropagation();
-
-	                var mapSize = context.map().dimensions();
-
-	                if (resizeOnX) {
-	                    var maxWidth = mapSize[0];
-	                    var newWidth = clamp((startWidth + event.clientX - startX), minWidth, maxWidth);
-	                    target.style('width', newWidth + 'px');
-	                }
+	  drawData.enabled = function (val) {
+	    if (!arguments.length) return _enabled;
+	    _enabled = val;
 
-	                if (resizeOnY) {
-	                    var maxHeight = mapSize[1] - 90;  // preserve space at top/bottom of map
-	                    var newHeight = clamp((startHeight + startY - event.clientY), minHeight, maxHeight);
-	                    target.style('height', newHeight + 'px');
-	                }
+	    if (_enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	                dispatch.call(eventName, target, utilGetDimensions(target, true));
-	            }
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	            function clamp(num, min, max) {
-	                return Math.max(min, Math.min(num, max));
-	            }
+	  drawData.hasData = function () {
+	    var gj = _geojson || {};
+	    return !!(_template || Object.keys(gj).length);
+	  };
 
-	            function stopResize() {
-	                if (pointerId !== (event.pointerId || 'mouse')) { return; }
+	  drawData.template = function (val, src) {
+	    if (!arguments.length) return _template; // test source against OSM imagery blocklists..
 
-	                event.preventDefault();
-	                event.stopPropagation();
+	    var osm = context.connection();
 
-	                // remove all the listeners we added
-	                select(window)
-	                    .on('.' + eventName, null);
-	            }
+	    if (osm) {
+	      var blocklists = osm.imageryBlocklists();
+	      var fail = false;
+	      var tested = 0;
+	      var regex;
 
-	            return function initResize() {
-	                event.preventDefault();
-	                event.stopPropagation();
+	      for (var i = 0; i < blocklists.length; i++) {
+	        regex = blocklists[i];
+	        fail = regex.test(val);
+	        tested++;
+	        if (fail) break;
+	      } // ensure at least one test was run.
 
-	                pointerId = event.pointerId || 'mouse';
 
-	                startX = event.clientX;
-	                startY = event.clientY;
-	                var targetRect = target.node().getBoundingClientRect();
-	                startWidth = targetRect.width;
-	                startHeight = targetRect.height;
+	      if (!tested) {
+	        regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+	        fail = regex.test(val);
+	      }
+	    }
 
-	                select(window)
-	                    .on(_pointerPrefix + 'move.' + eventName, startResize, false)
-	                    .on(_pointerPrefix + 'up.' + eventName, stopResize, false);
+	    _template = val;
+	    _fileList = null;
+	    _geojson = null; // strip off the querystring/hash from the template,
+	    // it often includes the access token
 
-	                if (_pointerPrefix === 'pointer') {
-	                    select(window)
-	                        .on('pointercancel.' + eventName, stopResize, false);
-	                }
-	            };
-	        }
-	    }
+	    _src = src || 'vectortile:' + val.split(/[?#]/)[0];
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    photoviewer.onMapResize = function() {
-	        var photoviewer = context.container().select('.photoviewer');
-	        var content = context.container().select('.main-content');
-	        var mapDimensions = utilGetDimensions(content, true);
-	        // shrink photo viewer if it is too big
-	        // (-90 preserves space at top and bottom of map used by menus)
-	        var photoDimensions = utilGetDimensions(photoviewer, true);
-	        if (photoDimensions[0] > mapDimensions[0] || photoDimensions[1] > (mapDimensions[1] - 90)) {
-	            var setPhotoDimensions = [
-	                Math.min(photoDimensions[0], mapDimensions[0]),
-	                Math.min(photoDimensions[1], mapDimensions[1] - 90) ];
+	  drawData.geojson = function (gj, src) {
+	    if (!arguments.length) return _geojson;
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null;
+	    gj = gj || {};
 
-	            photoviewer
-	                .style('width', setPhotoDimensions[0] + 'px')
-	                .style('height', setPhotoDimensions[1] + 'px');
+	    if (Object.keys(gj).length) {
+	      _geojson = ensureIDs(gj);
+	      _src = src || 'unknown.geojson';
+	    }
 
-	            dispatch$1.call('resize', photoviewer, setPhotoDimensions);
-	        }
-	    };
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    return utilRebind(photoviewer, dispatch$1, 'on');
-	}
+	  drawData.fileList = function (fileList) {
+	    if (!arguments.length) return _fileList;
+	    _template = null;
+	    _fileList = fileList;
+	    _geojson = null;
+	    _src = null;
+	    if (!fileList || !fileList.length) return this;
+	    var f = fileList[0];
+	    var extension = getExtension(f.name);
+	    var reader = new FileReader();
+
+	    reader.onload = function () {
+	      return function (e) {
+	        drawData.setFile(extension, e.target.result);
+	      };
+	    }();
 
-	function uiRestore(context) {
-	  return function(selection) {
-	    if (!context.history().hasRestorableChanges()) { return; }
+	    reader.readAsText(f);
+	    return this;
+	  };
 
-	    var modalSelection = uiModal(selection, true);
+	  drawData.url = function (url, defaultExtension) {
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null; // strip off any querystring/hash from the url before checking extension
 
-	    modalSelection.select('.modal')
-	      .attr('class', 'modal fillL');
+	    var testUrl = url.split(/[?#]/)[0];
+	    var extension = getExtension(testUrl) || defaultExtension;
 
-	    var introModal = modalSelection.select('.content');
+	    if (extension) {
+	      _template = null;
+	      d3_text(url).then(function (data) {
+	        drawData.setFile(extension, data);
+	      })["catch"](function () {
+	        /* ignore */
+	      });
+	    } else {
+	      drawData.template(url);
+	    }
 
-	    introModal
-	      .append('div')
-	      .attr('class', 'modal-section')
-	      .append('h3')
-	      .text(_t('restore.heading'));
-
-	    introModal
-	      .append('div')
-	      .attr('class','modal-section')
-	      .append('p')
-	      .text(_t('restore.description'));
-
-	    var buttonWrap = introModal
-	      .append('div')
-	      .attr('class', 'modal-actions');
-
-	    var restore = buttonWrap
-	      .append('button')
-	      .attr('class', 'restore')
-	      .on('click', function () {
-	        context.history().restore();
-	        modalSelection.remove();
-	      });
-
-	    restore
-	      .append('svg')
-	      .attr('class', 'logo logo-restore')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-restore');
-
-	    restore
-	      .append('div')
-	      .text(_t('restore.restore'));
-
-	    var reset = buttonWrap
-	      .append('button')
-	      .attr('class', 'reset')
-	      .on('click', function () {
-	        context.history().clearSaved();
-	        modalSelection.remove();
-	      });
-
-	    reset
-	      .append('svg')
-	      .attr('class', 'logo logo-reset')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-reset');
-
-	    reset
-	      .append('div')
-	      .text(_t('restore.reset'));
+	    return this;
+	  };
 
-	    restore.node().focus();
+	  drawData.getSrc = function () {
+	    return _src || '';
 	  };
-	}
 
-	function uiScale(context) {
-	    var projection = context.projection,
-	        isImperial = !_mainLocalizer.usesMetric(),
-	        maxLength = 180,
-	        tickHeight = 8;
+	  drawData.fitZoom = function () {
+	    var features = getFeatures(_geojson);
+	    if (!features.length) return;
+	    var map = context.map();
+	    var viewport = map.trimmedExtent().polygon();
+	    var coords = features.reduce(function (coords, feature) {
+	      var geom = feature.geometry;
+	      if (!geom) return coords;
+	      var c = geom.coordinates;
+	      /* eslint-disable no-fallthrough */
 
+	      switch (geom.type) {
+	        case 'Point':
+	          c = [c];
 
-	    function scaleDefs(loc1, loc2) {
-	        var lat = (loc2[1] + loc1[1]) / 2,
-	            conversion = (isImperial ? 3.28084 : 1),
-	            dist = geoLonToMeters(loc2[0] - loc1[0], lat) * conversion,
-	            scale = { dist: 0, px: 0, text: '' },
-	            buckets, i, val, dLon;
+	        case 'MultiPoint':
+	        case 'LineString':
+	          break;
 
-	        if (isImperial) {
-	            buckets = [5280000, 528000, 52800, 5280, 500, 50, 5, 1];
-	        } else {
-	            buckets = [5000000, 500000, 50000, 5000, 500, 50, 5, 1];
-	        }
+	        case 'MultiPolygon':
+	          c = utilArrayFlatten(c);
 
-	        // determine a user-friendly endpoint for the scale
-	        for (i = 0; i < buckets.length; i++) {
-	            val = buckets[i];
-	            if (dist >= val) {
-	                scale.dist = Math.floor(dist / val) * val;
-	                break;
-	            } else {
-	                scale.dist = +dist.toFixed(2);
-	            }
-	        }
+	        case 'Polygon':
+	        case 'MultiLineString':
+	          c = utilArrayFlatten(c);
+	          break;
+	      }
+	      /* eslint-enable no-fallthrough */
 
-	        dLon = geoMetersToLon(scale.dist / conversion, lat);
-	        scale.px = Math.round(projection([loc1[0] + dLon, loc1[1]])[0]);
 
-	        scale.text = displayLength(scale.dist / conversion, isImperial);
+	      return utilArrayUnion(coords, c);
+	    }, []);
 
-	        return scale;
+	    if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
+	      var extent = geoExtent(d3_geoBounds({
+	        type: 'LineString',
+	        coordinates: coords
+	      }));
+	      map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
 	    }
 
+	    return this;
+	  };
 
-	    function update(selection) {
-	        // choose loc1, loc2 along bottom of viewport (near where the scale will be drawn)
-	        var dims = context.map().dimensions(),
-	            loc1 = projection.invert([0, dims[1]]),
-	            loc2 = projection.invert([maxLength, dims[1]]),
-	            scale = scaleDefs(loc1, loc2);
+	  init();
+	  return drawData;
+	}
 
-	        selection.select('.scale-path')
-	            .attr('d', 'M0.5,0.5v' + tickHeight + 'h' + scale.px + 'v-' + tickHeight);
+	function svgDebug(projection, context) {
+	  function drawDebug(selection) {
+	    var showTile = context.getDebug('tile');
+	    var showCollision = context.getDebug('collision');
+	    var showImagery = context.getDebug('imagery');
+	    var showTouchTargets = context.getDebug('target');
+	    var showDownloaded = context.getDebug('downloaded');
+	    var debugData = [];
 
-	        selection.select('.scale-textgroup')
-	            .attr('transform', 'translate(' + (scale.px + 8) + ',' + tickHeight + ')');
+	    if (showTile) {
+	      debugData.push({
+	        "class": 'red',
+	        label: 'tile'
+	      });
+	    }
 
-	        selection.select('.scale-text')
-	            .text(scale.text);
+	    if (showCollision) {
+	      debugData.push({
+	        "class": 'yellow',
+	        label: 'collision'
+	      });
 	    }
 
+	    if (showImagery) {
+	      debugData.push({
+	        "class": 'orange',
+	        label: 'imagery'
+	      });
+	    }
 
-	    return function(selection) {
-	        function switchUnits() {
-	            isImperial = !isImperial;
-	            selection.call(update);
-	        }
+	    if (showTouchTargets) {
+	      debugData.push({
+	        "class": 'pink',
+	        label: 'touchTargets'
+	      });
+	    }
 
-	        var scalegroup = selection.append('svg')
-	            .attr('class', 'scale')
-	            .on('click', switchUnits)
-	            .append('g')
-	            .attr('transform', 'translate(10,11)');
+	    if (showDownloaded) {
+	      debugData.push({
+	        "class": 'purple',
+	        label: 'downloaded'
+	      });
+	    }
 
-	        scalegroup
-	            .append('path')
-	            .attr('class', 'scale-path');
+	    var legend = context.container().select('.main-content').selectAll('.debug-legend').data(debugData.length ? [0] : []);
+	    legend.exit().remove();
+	    legend = legend.enter().append('div').attr('class', 'fillD debug-legend').merge(legend);
+	    var legendItems = legend.selectAll('.debug-legend-item').data(debugData, function (d) {
+	      return d.label;
+	    });
+	    legendItems.exit().remove();
+	    legendItems.enter().append('span').attr('class', function (d) {
+	      return "debug-legend-item ".concat(d["class"]);
+	    }).text(function (d) {
+	      return d.label;
+	    });
+	    var layer = selection.selectAll('.layer-debug').data(showImagery || showDownloaded ? [0] : []);
+	    layer.exit().remove();
+	    layer = layer.enter().append('g').attr('class', 'layer-debug').merge(layer); // imagery
 
-	        scalegroup
-	            .append('g')
-	            .attr('class', 'scale-textgroup')
-	            .append('text')
-	            .attr('class', 'scale-text');
+	    var extent = context.map().extent();
+	    _mainFileFetcher.get('imagery').then(function (d) {
+	      var hits = showImagery && d.query.bbox(extent.rectangle(), true) || [];
+	      var features = hits.map(function (d) {
+	        return d.features[d.id];
+	      });
+	      var imagery = layer.selectAll('path.debug-imagery').data(features);
+	      imagery.exit().remove();
+	      imagery.enter().append('path').attr('class', 'debug-imagery debug orange');
+	    })["catch"](function () {
+	      /* ignore */
+	    }); // downloaded
 
-	        selection.call(update);
+	    var osm = context.connection();
+	    var dataDownloaded = [];
 
-	        context.map().on('move.scale', function() {
-	            update(selection);
-	        });
-	    };
-	}
+	    if (osm && showDownloaded) {
+	      var rtree = osm.caches('get').tile.rtree;
+	      dataDownloaded = rtree.all().map(function (bbox) {
+	        return {
+	          type: 'Feature',
+	          properties: {
+	            id: bbox.id
+	          },
+	          geometry: {
+	            type: 'Polygon',
+	            coordinates: [[[bbox.minX, bbox.minY], [bbox.minX, bbox.maxY], [bbox.maxX, bbox.maxY], [bbox.maxX, bbox.minY], [bbox.minX, bbox.minY]]]
+	          }
+	        };
+	      });
+	    }
 
-	function uiShortcuts(context) {
-	    var detected = utilDetect();
-	    var _activeTab = 0;
-	    var _modalSelection;
-	    var _selection = select(null);
+	    var downloaded = layer.selectAll('path.debug-downloaded').data(showDownloaded ? dataDownloaded : []);
+	    downloaded.exit().remove();
+	    downloaded.enter().append('path').attr('class', 'debug-downloaded debug purple'); // update
 
+	    layer.selectAll('path').attr('d', svgPath(projection).geojson);
+	  } // This looks strange because `enabled` methods on other layers are
+	  // chainable getter/setters, and this one is just a getter.
 
-	    context.keybinding()
-	        .on([_t('shortcuts.toggle.key'), '?'], function () {
-	            if (context.container().selectAll('.modal-shortcuts').size()) {  // already showing
-	                if (_modalSelection) {
-	                    _modalSelection.close();
-	                    _modalSelection = null;
-	                }
-	            } else {
-	                _modalSelection = uiModal(_selection);
-	                _modalSelection.call(shortcutsModal);
-	            }
-	        });
 
+	  drawDebug.enabled = function () {
+	    if (!arguments.length) {
+	      return context.getDebug('tile') || context.getDebug('collision') || context.getDebug('imagery') || context.getDebug('target') || context.getDebug('downloaded');
+	    } else {
+	      return this;
+	    }
+	  };
 
-	    function shortcutsModal(_modalSelection) {
-	        _modalSelection.select('.modal')
-	            .classed('modal-shortcuts', true);
+	  return drawDebug;
+	}
 
-	        var content = _modalSelection.select('.content');
+	/*
+	    A standalone SVG element that contains only a `defs` sub-element. To be
+	    used once globally, since defs IDs must be unique within a document.
+	*/
 
-	        content
-	            .append('div')
-	            .attr('class', 'modal-section')
-	            .append('h3')
-	            .text(_t('shortcuts.title'));
+	function svgDefs(context) {
+	  var _defsSelection = select(null);
 
-	        _mainFileFetcher.get('shortcuts')
-	            .then(function(data) { content.call(render, data); })
-	            .catch(function() { /* ignore */ });
-	    }
+	  var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];
 
+	  function drawDefs(selection) {
+	    _defsSelection = selection.append('defs'); // add markers
 
-	    function render(selection, dataShortcuts) {
-	        var wrapper = selection
-	            .selectAll('.wrapper')
-	            .data([0]);
+	    _defsSelection.append('marker').attr('id', 'ideditor-oneway-marker').attr('viewBox', '0 0 10 5').attr('refX', 2.5).attr('refY', 2.5).attr('markerWidth', 2).attr('markerHeight', 2).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'oneway-marker-path').attr('d', 'M 5,3 L 0,3 L 0,2 L 5,2 L 5,0 L 10,2.5 L 5,5 z').attr('stroke', 'none').attr('fill', '#000').attr('opacity', '0.75'); // SVG markers have to be given a colour where they're defined
+	    // (they can't inherit it from the line they're attached to),
+	    // so we need to manually define markers for each color of tag
+	    // (also, it's slightly nicer if we can control the
+	    // positioning for different tags)
 
-	        var wrapperEnter = wrapper
-	            .enter()
-	            .append('div')
-	            .attr('class', 'wrapper modal-section');
 
-	        var tabsBar = wrapperEnter
-	            .append('div')
-	            .attr('class', 'tabs-bar');
+	    function addSidedMarker(name, color, offset) {
+	      _defsSelection.append('marker').attr('id', 'ideditor-sided-marker-' + name).attr('viewBox', '0 0 2 2').attr('refX', 1).attr('refY', -offset).attr('markerWidth', 1.5).attr('markerHeight', 1.5).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'sided-marker-path sided-marker-' + name + '-path').attr('d', 'M 0,0 L 1,1 L 2,0 z').attr('stroke', 'none').attr('fill', color);
+	    }
 
-	        var shortcutsList = wrapperEnter
-	            .append('div')
-	            .attr('class', 'shortcuts-list');
+	    addSidedMarker('natural', 'rgb(170, 170, 170)', 0); // for a coastline, the arrows are (somewhat unintuitively) on
+	    // the water side, so let's color them blue (with a gap) to
+	    // give a stronger indication
 
-	        wrapper = wrapper.merge(wrapperEnter);
+	    addSidedMarker('coastline', '#77dede', 1);
+	    addSidedMarker('waterway', '#77dede', 1); // barriers have a dashed line, and separating the triangle
+	    // from the line visually suits that
 
-	        var tabs = tabsBar
-	            .selectAll('.tab')
-	            .data(dataShortcuts);
+	    addSidedMarker('barrier', '#ddd', 1);
+	    addSidedMarker('man_made', '#fff', 0);
 
-	        var tabsEnter = tabs
-	            .enter()
-	            .append('div')
-	            .attr('class', 'tab')
-	            .on('click', function (d, i) {
-	                _activeTab = i;
-	                render(selection, dataShortcuts);
-	            });
+	    _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', '#333').attr('fill-opacity', '0.75').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75');
 
-	        tabsEnter
-	            .append('span')
-	            .text(function (d) { return _t(d.text); });
+	    _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker-wireframe').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', 'none').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75'); // add patterns
 
-	        tabs = tabs
-	            .merge(tabsEnter);
 
-	        // Update
-	        wrapper.selectAll('.tab')
-	            .classed('active', function (d, i) {
-	                return i === _activeTab;
-	            });
+	    var patterns = _defsSelection.selectAll('pattern').data([// pattern name, pattern image name
+	    ['beach', 'dots'], ['construction', 'construction'], ['cemetery', 'cemetery'], ['cemetery_christian', 'cemetery_christian'], ['cemetery_buddhist', 'cemetery_buddhist'], ['cemetery_muslim', 'cemetery_muslim'], ['cemetery_jewish', 'cemetery_jewish'], ['farmland', 'farmland'], ['farmyard', 'farmyard'], ['forest', 'forest'], ['forest_broadleaved', 'forest_broadleaved'], ['forest_needleleaved', 'forest_needleleaved'], ['forest_leafless', 'forest_leafless'], ['golf_green', 'grass'], ['grass', 'grass'], ['landfill', 'landfill'], ['meadow', 'grass'], ['orchard', 'orchard'], ['pond', 'pond'], ['quarry', 'quarry'], ['scrub', 'bushes'], ['vineyard', 'vineyard'], ['water_standing', 'lines'], ['waves', 'waves'], ['wetland', 'wetland'], ['wetland_marsh', 'wetland_marsh'], ['wetland_swamp', 'wetland_swamp'], ['wetland_bog', 'wetland_bog'], ['wetland_reedbed', 'wetland_reedbed']]).enter().append('pattern').attr('id', function (d) {
+	      return 'ideditor-pattern-' + d[0];
+	    }).attr('width', 32).attr('height', 32).attr('patternUnits', 'userSpaceOnUse');
 
+	    patterns.append('rect').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('class', function (d) {
+	      return 'pattern-color-' + d[0];
+	    });
+	    patterns.append('image').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('xlink:href', function (d) {
+	      return context.imagePath('pattern/' + d[1] + '.png');
+	    }); // add clip paths
 
-	        var shortcuts = shortcutsList
-	            .selectAll('.shortcut-tab')
-	            .data(dataShortcuts);
+	    _defsSelection.selectAll('clipPath').data([12, 18, 20, 32, 45]).enter().append('clipPath').attr('id', function (d) {
+	      return 'ideditor-clip-square-' + d;
+	    }).append('rect').attr('x', 0).attr('y', 0).attr('width', function (d) {
+	      return d;
+	    }).attr('height', function (d) {
+	      return d;
+	    }); // add symbol spritesheets
 
-	        var shortcutsEnter = shortcuts
-	            .enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'shortcut-tab shortcut-tab-' + d.tab; });
 
-	        var columnsEnter = shortcutsEnter
-	            .selectAll('.shortcut-column')
-	            .data(function (d) { return d.columns; })
-	            .enter()
-	            .append('table')
-	            .attr('class', 'shortcut-column');
+	    addSprites(_spritesheetIds, true);
+	  }
 
-	        var rowsEnter = columnsEnter
-	            .selectAll('.shortcut-row')
-	            .data(function (d) { return d.rows; })
-	            .enter()
-	            .append('tr')
-	            .attr('class', 'shortcut-row');
+	  function addSprites(ids, overrideColors) {
+	    _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));
 
+	    var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);
 
-	        var sectionRows = rowsEnter
-	            .filter(function (d) { return !d.shortcuts; });
+	    spritesheets.enter().append('g').attr('class', function (d) {
+	      return 'spritesheet spritesheet-' + d;
+	    }).each(function (d) {
+	      var url = context.imagePath(d + '.svg');
+	      var node = select(this).node();
+	      svg(url).then(function (svg) {
+	        node.appendChild(select(svg.documentElement).attr('id', 'ideditor-' + d).node());
 
-	        sectionRows
-	            .append('td');
+	        if (overrideColors && d !== 'iD-sprite') {
+	          // allow icon colors to be overridden..
+	          select(node).selectAll('path').attr('fill', 'currentColor');
+	        }
+	      })["catch"](function () {
+	        /* ignore */
+	      });
+	    });
+	    spritesheets.exit().remove();
+	  }
 
-	        sectionRows
-	            .append('td')
-	            .attr('class', 'shortcut-section')
-	            .append('h3')
-	            .text(function (d) { return _t(d.text); });
+	  drawDefs.addSprites = addSprites;
+	  return drawDefs;
+	}
 
+	var _layerEnabled = false;
 
-	        var shortcutRows = rowsEnter
-	            .filter(function (d) { return d.shortcuts; });
+	var _qaService;
 
-	        var shortcutKeys = shortcutRows
-	            .append('td')
-	            .attr('class', 'shortcut-keys');
+	function svgKeepRight(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
-	        var modifierKeys = shortcutKeys
-	            .filter(function (d) { return d.modifiers; });
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var layerVisible = false;
 
-	        modifierKeys
-	            .selectAll('kbd.modifier')
-	            .data(function (d) {
-	                if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
-	                    return ['⌘'];
-	                } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
-	                    return [];
-	                } else {
-	                    return d.modifiers;
-	                }
-	            })
-	            .enter()
-	            .each(function () {
-	                var selection = select(this);
+	  function markerPath(selection, klass) {
+	    selection.attr('class', klass).attr('transform', 'translate(-4, -24)').attr('d', 'M11.6,6.2H7.1l1.4-5.1C8.6,0.6,8.1,0,7.5,0H2.2C1.7,0,1.3,0.3,1.3,0.8L0,10.2c-0.1,0.6,0.4,1.1,0.9,1.1h4.6l-1.8,7.6C3.6,19.4,4.1,20,4.7,20c0.3,0,0.6-0.2,0.8-0.5l6.9-11.9C12.7,7,12.3,6.2,11.6,6.2z');
+	  } // Loosely-coupled keepRight service for fetching issues.
 
-	                selection
-	                    .append('kbd')
-	                    .attr('class', 'modifier')
-	                    .text(function (d) { return uiCmd.display(d); });
 
-	                selection
-	                    .append('span')
-	                    .text('+');
-	            });
+	  function getService() {
+	    if (services.keepRight && !_qaService) {
+	      _qaService = services.keepRight;
 
+	      _qaService.on('loaded', throttledRedraw);
+	    } else if (!services.keepRight && _qaService) {
+	      _qaService = null;
+	    }
 
-	        shortcutKeys
-	            .selectAll('kbd.shortcut')
-	            .data(function (d) {
-	                var arr = d.shortcuts;
-	                if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
-	                    arr = ['Y'];
-	                } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
-	                    arr = ['F11'];
-	                }
+	    return _qaService;
+	  } // Show the markers
 
-	                // replace translations
-	                arr = arr.map(function(s) {
-	                    return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
-	                });
 
-	                return utilArrayUniq(arr).map(function(s) {
-	                    return {
-	                        shortcut: s,
-	                        separator: d.separator,
-	                        suffix: d.suffix
-	                    };
-	                });
-	            })
-	            .enter()
-	            .each(function (d, i, nodes) {
-	                var selection = select(this);
-	                var click = d.shortcut.toLowerCase().match(/(.*).click/);
-
-	                if (click && click[1]) {   // replace "left_click", "right_click" with mouse icon
-	                    selection
-	                        .call(svgIcon('#iD-walkthrough-mouse-' + click[1], 'operation'));
-	                } else if (d.shortcut.toLowerCase() === 'long-press') {
-	                    selection
-	                        .call(svgIcon('#iD-walkthrough-longpress', 'longpress operation'));
-	                } else if (d.shortcut.toLowerCase() === 'tap') {
-	                    selection
-	                        .call(svgIcon('#iD-walkthrough-tap', 'tap operation'));
-	                } else {
-	                    selection
-	                        .append('kbd')
-	                        .attr('class', 'shortcut')
-	                        .text(function (d) { return d.shortcut; });
-	                }
+	  function editOn() {
+	    if (!layerVisible) {
+	      layerVisible = true;
+	      drawLayer.style('display', 'block');
+	    }
+	  } // Immediately remove the markers and their touch targets
 
-	                if (i < nodes.length - 1) {
-	                    selection
-	                        .append('span')
-	                        .text(d.separator || '\u00a0' + _t('shortcuts.or') + '\u00a0');
-	                } else if (i === nodes.length - 1 && d.suffix) {
-	                    selection
-	                        .append('span')
-	                        .text(d.suffix);
-	                }
-	            });
 
+	  function editOff() {
+	    if (layerVisible) {
+	      layerVisible = false;
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.qaItem.keepRight').remove();
+	      touchLayer.selectAll('.qaItem.keepRight').remove();
+	    }
+	  } // Enable the layer.  This shows the markers and transitions them to visible.
 
-	        shortcutKeys
-	            .filter(function(d) { return d.gesture; })
-	            .each(function () {
-	                var selection = select(this);
 
-	                selection
-	                    .append('span')
-	                    .text('+');
+	  function layerOn() {
+	    editOn();
+	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      return dispatch.call('change');
+	    });
+	  } // Disable the layer.  This transitions the layer invisible and then hides the markers.
 
-	                selection
-	                    .append('span')
-	                    .attr('class', 'gesture')
-	                    .text(function (d) { return _t(d.gesture); });
-	            });
 
+	  function layerOff() {
+	    throttledRedraw.cancel();
+	    drawLayer.interrupt();
+	    touchLayer.selectAll('.qaItem.keepRight').remove();
+	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      editOff();
+	      dispatch.call('change');
+	    });
+	  } // Update the issue markers
 
-	        shortcutRows
-	            .append('td')
-	            .attr('class', 'shortcut-desc')
-	            .text(function (d) { return d.text ? _t(d.text) : '\u00a0'; });
 
+	  function updateMarkers() {
+	    if (!layerVisible || !_layerEnabled) return;
+	    var service = getService();
+	    var selectedID = context.selectedErrorID();
+	    var data = service ? service.getItems(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	        shortcuts = shortcuts
-	            .merge(shortcutsEnter);
+	    var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	        // Update
-	        wrapper.selectAll('.shortcut-tab')
-	            .style('display', function (d, i) {
-	                return i === _activeTab ? 'flex' : 'none';
-	            });
-	    }
+	    markers.exit().remove(); // enter
 
+	    var markersEnter = markers.enter().append('g').attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
+	    });
+	    markersEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+	    markersEnter.append('path').call(markerPath, 'shadow');
+	    markersEnter.append('use').attr('class', 'qaItem-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-bolt'); // update
 
-	    return function(selection, show) {
-	        _selection = selection;
-	        if (show) {
-	            _modalSelection = uiModal(selection);
-	            _modalSelection.call(shortcutsModal);
-	        }
-	    };
-	}
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
-	var pair_1 = pair;
+	    if (touchLayer.empty()) return;
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var targets = touchLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
+	    targets.exit().remove(); // enter/update
 
-	function search(input, dims) {
-	  if (!dims) { dims = 'NSEW'; }
-	  if (typeof input !== 'string') { return null; }
+	    targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+	    }).attr('transform', getTransform);
 
-	  input = input.toUpperCase();
-	  var regex = /^[\s\,]*([NSEW])?\s*([\-|\—|\―]?[0-9.]+)[°º˚]?\s*(?:([0-9.]+)['’′‘]\s*)?(?:([0-9.]+)(?:''|"|”|″)\s*)?([NSEW])?/;
+	    function sortY(a, b) {
+	      return a.id === selectedID ? 1 : b.id === selectedID ? -1 : a.severity === 'error' && b.severity !== 'error' ? 1 : b.severity === 'error' && a.severity !== 'error' ? -1 : b.loc[1] - a.loc[1];
+	    }
+	  } // Draw the keepRight layer and schedule loading issues and updating markers.
 
-	  var m = input.match(regex);
-	  if (!m) { return null; }  // no match
 
-	  var matched = m[0];
+	  function drawKeepRight(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	  // extract dimension.. m[1] = leading, m[5] = trailing
-	  var dim;
-	  if (m[1] && m[5]) {                 // if matched both..
-	    dim = m[1];                       // keep leading
-	    matched = matched.slice(0, -1);   // remove trailing dimension from match
-	  } else {
-	    dim = m[1] || m[5];
-	  }
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
-	  // if unrecognized dimension
-	  if (dim && dims.indexOf(dim) === -1) { return null; }
+	    drawLayer = selection.selectAll('.layer-keepRight').data(service ? [0] : []);
+	    drawLayer.exit().remove();
+	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-keepRight').style('display', _layerEnabled ? 'block' : 'none').merge(drawLayer);
 
-	  // extract DMS
-	  var deg = m[2] ? parseFloat(m[2]) : 0;
-	  var min = m[3] ? parseFloat(m[3]) / 60 : 0;
-	  var sec = m[4] ? parseFloat(m[4]) / 3600 : 0;
-	  var sign = (deg < 0) ? -1 : 1;
-	  if (dim === 'S' || dim === 'W') { sign *= -1; }
+	    if (_layerEnabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadIssues(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
-	  return {
-	    val: (Math.abs(deg) + min + sec) * sign,
-	    dim: dim,
-	    matched: matched,
-	    remain: input.slice(matched.length)
-	  };
-	}
 
+	  drawKeepRight.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled;
+	    _layerEnabled = val;
 
-	function pair(input, dims) {
-	  input = input.trim();
-	  var one = search(input, dims);
-	  if (!one) { return null; }
+	    if (_layerEnabled) {
+	      layerOn();
+	    } else {
+	      layerOff();
 
-	  input = one.remain.trim();
-	  var two = search(input, dims);
-	  if (!two || two.remain) { return null; }
+	      if (context.selectedErrorID()) {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
 
-	  if (one.dim) {
-	    return swapdim(one.val, two.val, one.dim);
-	  } else {
-	    return [one.val, two.val];
-	  }
-	}
+	    dispatch.call('change');
+	    return this;
+	  };
 
+	  drawKeepRight.supported = function () {
+	    return !!getService();
+	  };
 
-	function swapdim(a, b, dim) {
-	  if (dim === 'N' || dim === 'S') { return [a, b]; }
-	  if (dim === 'W' || dim === 'E') { return [b, a]; }
+	  return drawKeepRight;
 	}
 
-	function uiFeatureList(context) {
-	    var _geocodeResults;
-
+	function svgGeolocate(projection) {
+	  var layer = select(null);
 
-	    function featureList(selection) {
-	        var header = selection
-	            .append('div')
-	            .attr('class', 'header fillL cf');
+	  var _position;
 
-	        header
-	            .append('h3')
-	            .text(_t('inspector.feature_list'));
+	  function init() {
+	    if (svgGeolocate.initialized) return; // run once
 
-	        var searchWrap = selection
-	            .append('div')
-	            .attr('class', 'search-header');
+	    svgGeolocate.enabled = false;
+	    svgGeolocate.initialized = true;
+	  }
 
-	        var search = searchWrap
-	            .append('input')
-	            .attr('placeholder', _t('inspector.search'))
-	            .attr('type', 'search')
-	            .call(utilNoAuto)
-	            .on('keypress', keypress)
-	            .on('keydown', keydown)
-	            .on('input', inputevent);
+	  function showLayer() {
+	    layer.style('display', 'block');
+	  }
 
-	        searchWrap
-	            .call(svgIcon('#iD-icon-search', 'pre-text'));
+	  function hideLayer() {
+	    layer.transition().duration(250).style('opacity', 0);
+	  }
 
-	        var listWrap = selection
-	            .append('div')
-	            .attr('class', 'inspector-body');
+	  function layerOn() {
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
+	  }
 
-	        var list = listWrap
-	            .append('div')
-	            .attr('class', 'feature-list cf');
+	  function layerOff() {
+	    layer.style('display', 'none');
+	  }
 
-	        context
-	            .on('exit.feature-list', clearSearch);
-	        context.map()
-	            .on('drawn.feature-list', mapDrawn);
+	  function transform(d) {
+	    return svgPointTransform(projection)(d);
+	  }
 
-	        context.keybinding()
-	            .on(uiCmd('⌘F'), focusSearch);
+	  function accuracy(accuracy, loc) {
+	    // converts accuracy to pixels...
+	    var degreesRadius = geoMetersToLat(accuracy),
+	        tangentLoc = [loc[0], loc[1] + degreesRadius],
+	        projectedTangent = projection(tangentLoc),
+	        projectedLoc = projection([loc[0], loc[1]]); // southern most point will have higher pixel value...
 
+	    return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
+	  }
 
-	        function focusSearch() {
-	            var mode = context.mode() && context.mode().id;
-	            if (mode !== 'browse') { return; }
+	  function update() {
+	    var geolocation = {
+	      loc: [_position.coords.longitude, _position.coords.latitude]
+	    };
+	    var groups = layer.selectAll('.geolocations').selectAll('.geolocation').data([geolocation]);
+	    groups.exit().remove();
+	    var pointsEnter = groups.enter().append('g').attr('class', 'geolocation');
+	    pointsEnter.append('circle').attr('class', 'geolocate-radius').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('fill-opacity', '0.3').attr('r', '0');
+	    pointsEnter.append('circle').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('stroke', 'white').attr('stroke-width', '1.5').attr('r', '6');
+	    groups.merge(pointsEnter).attr('transform', transform);
+	    layer.select('.geolocate-radius').attr('r', accuracy(_position.coords.accuracy, geolocation.loc));
+	  }
+
+	  function drawLocation(selection) {
+	    var enabled = svgGeolocate.enabled;
+	    layer = selection.selectAll('.layer-geolocate').data([0]);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-geolocate').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'geolocations');
+	    layer = layerEnter.merge(layer);
+
+	    if (enabled) {
+	      update();
+	    } else {
+	      layerOff();
+	    }
+	  }
 
-	            event.preventDefault();
-	            search.node().focus();
-	        }
+	  drawLocation.enabled = function (position, enabled) {
+	    if (!arguments.length) return svgGeolocate.enabled;
+	    _position = position;
+	    svgGeolocate.enabled = enabled;
 
+	    if (svgGeolocate.enabled) {
+	      showLayer();
+	      layerOn();
+	    } else {
+	      hideLayer();
+	    }
 
-	        function keydown() {
-	            if (event.keyCode === 27) {  // escape
-	                search.node().blur();
-	            }
-	        }
+	    return this;
+	  };
 
+	  init();
+	  return drawLocation;
+	}
 
-	        function keypress() {
-	            var q = search.property('value'),
-	                items = list.selectAll('.feature-list-item');
-	            if (event.keyCode === 13 && q.length && items.size()) {  // return
-	                click(items.datum());
-	            }
-	        }
+	function svgLabels(projection, context) {
+	  var path = d3_geoPath(projection);
+	  var detected = utilDetect();
+	  var baselineHack = detected.ie || detected.browser.toLowerCase() === 'edge' || detected.browser.toLowerCase() === 'firefox' && detected.version >= 70;
 
+	  var _rdrawn = new RBush();
 
-	        function inputevent() {
-	            _geocodeResults = undefined;
-	            drawList();
-	        }
+	  var _rskipped = new RBush();
 
+	  var _textWidthCache = {};
+	  var _entitybboxes = {}; // Listed from highest to lowest priority
 
-	        function clearSearch() {
-	            search.property('value', '');
-	            drawList();
-	        }
+	  var labelStack = [['line', 'aeroway', '*', 12], ['line', 'highway', 'motorway', 12], ['line', 'highway', 'trunk', 12], ['line', 'highway', 'primary', 12], ['line', 'highway', 'secondary', 12], ['line', 'highway', 'tertiary', 12], ['line', 'highway', '*', 12], ['line', 'railway', '*', 12], ['line', 'waterway', '*', 12], ['area', 'aeroway', '*', 12], ['area', 'amenity', '*', 12], ['area', 'building', '*', 12], ['area', 'historic', '*', 12], ['area', 'leisure', '*', 12], ['area', 'man_made', '*', 12], ['area', 'natural', '*', 12], ['area', 'shop', '*', 12], ['area', 'tourism', '*', 12], ['area', 'camp_site', '*', 12], ['point', 'aeroway', '*', 10], ['point', 'amenity', '*', 10], ['point', 'building', '*', 10], ['point', 'historic', '*', 10], ['point', 'leisure', '*', 10], ['point', 'man_made', '*', 10], ['point', 'natural', '*', 10], ['point', 'shop', '*', 10], ['point', 'tourism', '*', 10], ['point', 'camp_site', '*', 10], ['line', 'name', '*', 12], ['area', 'name', '*', 12], ['point', 'name', '*', 10]];
 
+	  function shouldSkipIcon(preset) {
+	    var noIcons = ['building', 'landuse', 'natural'];
+	    return noIcons.some(function (s) {
+	      return preset.id.indexOf(s) >= 0;
+	    });
+	  }
 
-	        function mapDrawn(e) {
-	            if (e.full) {
-	                drawList();
-	            }
-	        }
+	  function get(array, prop) {
+	    return function (d, i) {
+	      return array[i][prop];
+	    };
+	  }
 
+	  function textWidth(text, size, elem) {
+	    var c = _textWidthCache[size];
+	    if (!c) c = _textWidthCache[size] = {};
 
-	        function features() {
-	            var result = [];
-	            var graph = context.graph();
-	            var visibleCenter = context.map().extent().center();
-	            var q = search.property('value').toLowerCase();
+	    if (c[text]) {
+	      return c[text];
+	    } else if (elem) {
+	      c[text] = elem.getComputedTextLength();
+	      return c[text];
+	    } else {
+	      var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
 
-	            if (!q) { return result; }
+	      if (str === null) {
+	        return size / 3 * 2 * text.length;
+	      } else {
+	        return size / 3 * (2 * text.length + str.length);
+	      }
+	    }
+	  }
 
-	            var idMatch = q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
+	  function drawLinePaths(selection, entities, filter, classes, labels) {
+	    var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit
 
-	            if (idMatch) {
-	                var elemType = idMatch[1].charAt(0);
-	                var elemId = idMatch[2];
-	                result.push({
-	                    id: elemType + elemId,
-	                    geometry: elemType === 'n' ? 'point' : elemType === 'w' ? 'line' : 'relation',
-	                    type: elemType === 'n' ? _t('inspector.node') : elemType === 'w' ? _t('inspector.way') : _t('inspector.relation'),
-	                    name: elemId
-	                });
-	            }
+	    paths.exit().remove(); // enter/update
 
-	            var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);
+	    paths.enter().append('path').style('stroke-width', get(labels, 'font-size')).attr('id', function (d) {
+	      return 'ideditor-labelpath-' + d.id;
+	    }).attr('class', classes).merge(paths).attr('d', get(labels, 'lineString'));
+	  }
 
-	            if (locationMatch) {
-	                var loc = [parseFloat(locationMatch[0]), parseFloat(locationMatch[1])];
-	                result.push({
-	                    id: -1,
-	                    geometry: 'point',
-	                    type: _t('inspector.location'),
-	                    name: dmsCoordinatePair([loc[1], loc[0]]),
-	                    location: loc
-	                });
-	            }
+	  function drawLineLabels(selection, entities, filter, classes, labels) {
+	    var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	            var allEntities = graph.entities;
-	            var localResults = [];
-	            for (var id in allEntities) {
-	                var entity = allEntities[id];
-	                if (!entity) { continue; }
-
-	                var name = utilDisplayName(entity) || '';
-	                if (name.toLowerCase().indexOf(q) < 0) { continue; }
-
-	                var matched = _mainPresetIndex.match(entity, graph);
-	                var type = (matched && matched.name()) || utilDisplayType(entity.id);
-	                var extent = entity.extent(graph);
-	                var distance = extent ? geoSphericalDistance(visibleCenter, extent.center()) : 0;
-
-	                localResults.push({
-	                    id: entity.id,
-	                    entity: entity,
-	                    geometry: entity.geometry(graph),
-	                    type: type,
-	                    name: name,
-	                    distance: distance
-	                });
+	    texts.exit().remove(); // enter
 
-	                if (localResults.length > 100) { break; }
-	            }
-	            localResults = localResults.sort(function byDistance(a, b) {
-	                return a.distance - b.distance;
-	            });
-	            result = result.concat(localResults);
+	    texts.enter().append('text').attr('class', function (d, i) {
+	      return classes + ' ' + labels[i].classes + ' ' + d.id;
+	    }).attr('dy', baselineHack ? '0.35em' : null).append('textPath').attr('class', 'textpath'); // update
 
-	            (_geocodeResults || []).forEach(function(d) {
-	                if (d.osm_type && d.osm_id) {    // some results may be missing these - #1890
+	    selection.selectAll('text.' + classes).selectAll('.textpath').filter(filter).data(entities, osmEntity.key).attr('startOffset', '50%').attr('xlink:href', function (d) {
+	      return '#ideditor-labelpath-' + d.id;
+	    }).text(utilDisplayNameForPath);
+	  }
 
-	                    // Make a temporary osmEntity so we can preset match
-	                    // and better localize the search result - #4725
-	                    var id = osmEntity.id.fromOSM(d.osm_type, d.osm_id);
-	                    var tags = {};
-	                    tags[d.class] = d.type;
+	  function drawPointLabels(selection, entities, filter, classes, labels) {
+	    var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	                    var attrs = { id: id, type: d.osm_type, tags: tags };
-	                    if (d.osm_type === 'way') {   // for ways, add some fake closed nodes
-	                        attrs.nodes = ['a','a'];  // so that geometry area is possible
-	                    }
+	    texts.exit().remove(); // enter/update
 
-	                    var tempEntity = osmEntity(attrs);
-	                    var tempGraph = coreGraph([tempEntity]);
-	                    var matched = _mainPresetIndex.match(tempEntity, tempGraph);
-	                    var type = (matched && matched.name()) || utilDisplayType(id);
-
-	                    result.push({
-	                        id: tempEntity.id,
-	                        geometry: tempEntity.geometry(tempGraph),
-	                        type: type,
-	                        name: d.display_name,
-	                        extent: new geoExtent(
-	                            [parseFloat(d.boundingbox[3]), parseFloat(d.boundingbox[0])],
-	                            [parseFloat(d.boundingbox[2]), parseFloat(d.boundingbox[1])])
-	                    });
-	                }
-	            });
+	    texts.enter().append('text').attr('class', function (d, i) {
+	      return classes + ' ' + labels[i].classes + ' ' + d.id;
+	    }).merge(texts).attr('x', get(labels, 'x')).attr('y', get(labels, 'y')).style('text-anchor', get(labels, 'textAnchor')).text(utilDisplayName).each(function (d, i) {
+	      textWidth(utilDisplayName(d), labels[i].height, this);
+	    });
+	  }
 
-	            if (q.match(/^[0-9]+$/)) {
-	                // if query is just a number, possibly an OSM ID without a prefix
-	                result.push({
-	                    id: 'n' + q,
-	                    geometry: 'point',
-	                    type: _t('inspector.node'),
-	                    name: q
-	                });
-	                result.push({
-	                    id: 'w' + q,
-	                    geometry: 'line',
-	                    type: _t('inspector.way'),
-	                    name: q
-	                });
-	                result.push({
-	                    id: 'r' + q,
-	                    geometry: 'relation',
-	                    type: _t('inspector.relation'),
-	                    name: q
-	                });
-	            }
+	  function drawAreaLabels(selection, entities, filter, classes, labels) {
+	    entities = entities.filter(hasText);
+	    labels = labels.filter(hasText);
+	    drawPointLabels(selection, entities, filter, classes, labels);
 
-	            return result;
-	        }
+	    function hasText(d, i) {
+	      return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
+	    }
+	  }
 
+	  function drawAreaIcons(selection, entities, filter, classes, labels) {
+	    var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	        function drawList() {
-	            var value = search.property('value');
-	            var results = features();
+	    icons.exit().remove(); // enter/update
 
-	            list.classed('filtered', value.length);
+	    icons.enter().append('use').attr('class', 'icon ' + classes).attr('width', '17px').attr('height', '17px').merge(icons).attr('transform', get(labels, 'transform')).attr('xlink:href', function (d) {
+	      var preset = _mainPresetIndex.match(d, context.graph());
+	      var picon = preset && preset.icon;
 
-	            var resultsIndicator = list.selectAll('.no-results-item')
-	                .data([0])
-	                .enter()
-	                .append('button')
-	                .property('disabled', true)
-	                .attr('class', 'no-results-item')
-	                .call(svgIcon('#iD-icon-alert', 'pre-text'));
-
-	            resultsIndicator.append('span')
-	                .attr('class', 'entity-name');
-
-	            list.selectAll('.no-results-item .entity-name')
-	                .text(_t('geocoder.no_results_worldwide'));
-
-	            if (services.geocoder) {
-	              list.selectAll('.geocode-item')
-	                  .data([0])
-	                  .enter()
-	                  .append('button')
-	                  .attr('class', 'geocode-item')
-	                  .on('click', geocoderSearch)
-	                  .append('div')
-	                  .attr('class', 'label')
-	                  .append('span')
-	                  .attr('class', 'entity-name')
-	                  .text(_t('geocoder.search'));
-	            }
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return '#' + picon + (isMaki ? '-15' : '');
+	      }
+	    });
+	  }
 
-	            list.selectAll('.no-results-item')
-	                .style('display', (value.length && !results.length) ? 'block' : 'none');
+	  function drawCollisionBoxes(selection, rtree, which) {
+	    var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
+	    var gj = [];
 
-	            list.selectAll('.geocode-item')
-	                .style('display', (value && _geocodeResults === undefined) ? 'block' : 'none');
+	    if (context.getDebug('collision')) {
+	      gj = rtree.all().map(function (d) {
+	        return {
+	          type: 'Polygon',
+	          coordinates: [[[d.minX, d.minY], [d.maxX, d.minY], [d.maxX, d.maxY], [d.minX, d.maxY], [d.minX, d.minY]]]
+	        };
+	      });
+	    }
 
-	            list.selectAll('.feature-list-item')
-	                .data([-1])
-	                .remove();
+	    var boxes = selection.selectAll('.' + which).data(gj); // exit
 
-	            var items = list.selectAll('.feature-list-item')
-	                .data(results, function(d) { return d.id; });
+	    boxes.exit().remove(); // enter/update
 
-	            var enter = items.enter()
-	                .insert('button', '.geocode-item')
-	                .attr('class', 'feature-list-item')
-	                .on('mouseover', mouseover)
-	                .on('mouseout', mouseout)
-	                .on('click', click);
+	    boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
+	  }
 
-	            var label = enter
-	                .append('div')
-	                .attr('class', 'label');
+	  function drawLabels(selection, graph, entities, filter, dimensions, fullRedraw) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    var labelable = [];
+	    var renderNodeAs = {};
+	    var i, j, k, entity, geometry;
 
-	            label
-	                .each(function(d) {
-	                    select(this)
-	                        .call(svgIcon('#iD-icon-' + d.geometry, 'pre-text'));
-	                });
+	    for (i = 0; i < labelStack.length; i++) {
+	      labelable.push([]);
+	    }
 
-	            label
-	                .append('span')
-	                .attr('class', 'entity-type')
-	                .text(function(d) { return d.type; });
+	    if (fullRedraw) {
+	      _rdrawn.clear();
 
-	            label
-	                .append('span')
-	                .attr('class', 'entity-name')
-	                .text(function(d) { return d.name; });
+	      _rskipped.clear();
 
-	            enter
-	                .style('opacity', 0)
-	                .transition()
-	                .style('opacity', 1);
+	      _entitybboxes = {};
+	    } else {
+	      for (i = 0; i < entities.length; i++) {
+	        entity = entities[i];
+	        var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);
 
-	            items.order();
+	        for (j = 0; j < toRemove.length; j++) {
+	          _rdrawn.remove(toRemove[j]);
 
-	            items.exit()
-	                .remove();
+	          _rskipped.remove(toRemove[j]);
 	        }
+	      }
+	    } // Loop through all the entities to do some preprocessing
 
 
-	        function mouseover(d) {
-	            if (d.id === -1) { return; }
-
-	            utilHighlightEntities([d.id], true, context);
-	        }
-
+	    for (i = 0; i < entities.length; i++) {
+	      entity = entities[i];
+	      geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices
 
-	        function mouseout(d) {
-	            if (d.id === -1) { return; }
+	      if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
+	        var hasDirections = entity.directions(graph, projection).length;
+	        var markerPadding;
 
-	            utilHighlightEntities([d.id], false, context);
+	        if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
+	          renderNodeAs[entity.id] = 'point';
+	          markerPadding = 20; // extra y for marker height
+	        } else {
+	          renderNodeAs[entity.id] = 'vertex';
+	          markerPadding = 0;
 	        }
 
+	        var coord = projection(entity.loc);
+	        var nodePadding = 10;
+	        var bbox = {
+	          minX: coord[0] - nodePadding,
+	          minY: coord[1] - nodePadding - markerPadding,
+	          maxX: coord[0] + nodePadding,
+	          maxY: coord[1] + nodePadding
+	        };
+	        doInsert(bbox, entity.id + 'P');
+	      } // From here on, treat vertices like points
 
-	        function click(d) {
-	            event.preventDefault();
-
-	            if (d.location) {
-	                context.map().centerZoomEase([d.location[1], d.location[0]], 19);
 
-	            } else if (d.entity) {
-	                utilHighlightEntities([d.id], false, context);
+	      if (geometry === 'vertex') {
+	        geometry = 'point';
+	      } // Determine which entities are label-able
 
-	                context.enter(modeSelect(context, [d.entity.id]));
-	                context.map().zoomToEase(d.entity);
 
-	            } else {
-	                // download, zoom to, and select the entity with the given ID
-	                context.zoomToEntity(d.id);
-	            }
-	        }
+	      var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
+	      var icon = preset && !shouldSkipIcon(preset) && preset.icon;
+	      if (!icon && !utilDisplayName(entity)) continue;
 
+	      for (k = 0; k < labelStack.length; k++) {
+	        var matchGeom = labelStack[k][0];
+	        var matchKey = labelStack[k][1];
+	        var matchVal = labelStack[k][2];
+	        var hasVal = entity.tags[matchKey];
 
-	        function geocoderSearch() {
-	            services.geocoder.search(search.property('value'), function (err, resp) {
-	                _geocodeResults = resp || [];
-	                drawList();
-	            });
+	        if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
+	          labelable[k].push(entity);
+	          break;
 	        }
+	      }
 	    }
 
+	    var positions = {
+	      point: [],
+	      line: [],
+	      area: []
+	    };
+	    var labelled = {
+	      point: [],
+	      line: [],
+	      area: []
+	    }; // Try and find a valid label for labellable entities
 
-	    return featureList;
-	}
+	    for (k = 0; k < labelable.length; k++) {
+	      var fontSize = labelStack[k][3];
 
-	function uiSectionEntityIssues(context) {
+	      for (i = 0; i < labelable[k].length; i++) {
+	        entity = labelable[k][i];
+	        geometry = entity.geometry(graph);
+	        var getName = geometry === 'line' ? utilDisplayNameForPath : utilDisplayName;
+	        var name = getName(entity);
+	        var width = name && textWidth(name, fontSize);
+	        var p = null;
 
-	    var _entityIDs = [];
-	    var _issues = [];
-	    var _activeIssueID;
+	        if (geometry === 'point' || geometry === 'vertex') {
+	          // no point or vertex labels in wireframe mode
+	          // no vertex labels at low zooms (vertices have no icons)
+	          if (wireframe) continue;
+	          var renderAs = renderNodeAs[entity.id];
+	          if (renderAs === 'vertex' && zoom < 17) continue;
+	          p = getPointLabel(entity, width, fontSize, renderAs);
+	        } else if (geometry === 'line') {
+	          p = getLineLabel(entity, width, fontSize);
+	        } else if (geometry === 'area') {
+	          p = getAreaLabel(entity, width, fontSize);
+	        }
 
-	    var section = uiSection('entity-issues', context)
-	        .shouldDisplay(function() {
-	            return _issues.length > 0;
-	        })
-	        .title(function() {
-	            return _t('issues.list_title', { count: _issues.length });
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	        if (p) {
+	          if (geometry === 'vertex') {
+	            geometry = 'point';
+	          } // treat vertex like point
 
-	    context.validator()
-	        .on('validated.entity_issues', function() {
-	            // Refresh on validated events
-	            reloadIssues();
-	            section.reRender();
-	        })
-	        .on('focusedIssue.entity_issues', function(issue) {
-	             makeActiveIssue(issue.id);
-	        });
 
-	    function reloadIssues() {
-	        _issues = context.validator().getSharedEntityIssues(_entityIDs, { includeDisabledRules: true });
+	          p.classes = geometry + ' tag-' + labelStack[k][1];
+	          positions[geometry].push(p);
+	          labelled[geometry].push(entity);
+	        }
+	      }
 	    }
 
-	    function makeActiveIssue(issueID) {
-	        _activeIssueID = issueID;
-	        section.selection().selectAll('.issue-container')
-	            .classed('active', function(d) { return d.id === _activeIssueID; });
+	    function isInterestingVertex(entity) {
+	      var selectedIDs = context.selectedIDs();
+	      return entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || selectedIDs.indexOf(entity.id) !== -1 || graph.parentWays(entity).some(function (parent) {
+	        return selectedIDs.indexOf(parent.id) !== -1;
+	      });
 	    }
 
-	    function renderDisclosureContent(selection) {
-
-	        selection.classed('grouped-items-area', true);
-
-	        _activeIssueID = _issues.length > 0 ? _issues[0].id : null;
-
-	        var containers = selection.selectAll('.issue-container')
-	            .data(_issues, function(d) { return d.id; });
-
-	        // Exit
-	        containers.exit()
-	            .remove();
-
-	        // Enter
-	        var containersEnter = containers.enter()
-	            .append('div')
-	            .attr('class', 'issue-container');
+	    function getPointLabel(entity, width, height, geometry) {
+	      var y = geometry === 'point' ? -12 : 0;
+	      var pointOffsets = {
+	        ltr: [15, y, 'start'],
+	        rtl: [-15, y, 'end']
+	      };
+	      var textDirection = _mainLocalizer.textDirection();
+	      var coord = projection(entity.loc);
+	      var textPadding = 2;
+	      var offset = pointOffsets[textDirection];
+	      var p = {
+	        height: height,
+	        width: width,
+	        x: coord[0] + offset[0],
+	        y: coord[1] + offset[1],
+	        textAnchor: offset[2]
+	      }; // insert a collision box for the text label..
+
+	      var bbox;
+
+	      if (textDirection === 'rtl') {
+	        bbox = {
+	          minX: p.x - width - textPadding,
+	          minY: p.y - height / 2 - textPadding,
+	          maxX: p.x + textPadding,
+	          maxY: p.y + height / 2 + textPadding
+	        };
+	      } else {
+	        bbox = {
+	          minX: p.x - textPadding,
+	          minY: p.y - height / 2 - textPadding,
+	          maxX: p.x + width + textPadding,
+	          maxY: p.y + height / 2 + textPadding
+	        };
+	      }
 
+	      if (tryInsert([bbox], entity.id, true)) {
+	        return p;
+	      }
+	    }
 
-	        var itemsEnter = containersEnter
-	            .append('div')
-	            .attr('class', function(d) { return 'issue severity-' + d.severity; })
-	            .on('mouseover.highlight', function(d) {
-	                // don't hover-highlight the selected entity
-	                var ids = d.entityIds
-	                    .filter(function(e) { return _entityIDs.indexOf(e) === -1; });
-
-	                utilHighlightEntities(ids, true, context);
-	            })
-	            .on('mouseout.highlight', function(d) {
-	                var ids = d.entityIds
-	                    .filter(function(e) { return _entityIDs.indexOf(e) === -1; });
-
-	                utilHighlightEntities(ids, false, context);
-	            });
+	    function getLineLabel(entity, width, height) {
+	      var viewport = geoExtent(context.projection.clipExtent()).polygon();
+	      var points = graph.childNodes(entity).map(function (node) {
+	        return projection(node.loc);
+	      });
+	      var length = geoPathLength(points);
+	      if (length < width + 20) return; // % along the line to attempt to place the label
 
-	        var labelsEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'issue-label')
-	            .on('click', function(d) {
+	      var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70, 25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
+	      var padding = 3;
 
-	                makeActiveIssue(d.id); // expand only the clicked item
+	      for (var i = 0; i < lineOffsets.length; i++) {
+	        var offset = lineOffsets[i];
+	        var middle = offset / 100 * length;
+	        var start = middle - width / 2;
+	        if (start < 0 || start + width > length) continue; // generate subpath and ignore paths that are invalid or don't cross viewport.
 
-	                var extent = d.extent(context.graph());
-	                if (extent) {
-	                    var setZoom = Math.max(context.map().zoom(), 19);
-	                    context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
-	                }
-	            });
+	        var sub = subpath(points, start, start + width);
 
-	        var textEnter = labelsEnter
-	            .append('span')
-	            .attr('class', 'issue-text');
-
-	        textEnter
-	            .append('span')
-	            .attr('class', 'issue-icon')
-	            .each(function(d) {
-	                var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
-	                select(this)
-	                    .call(svgIcon(iconName));
-	            });
+	        if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
+	          continue;
+	        }
 
-	        textEnter
-	            .append('span')
-	            .attr('class', 'issue-message');
-
-
-	        var infoButton = labelsEnter
-	            .append('button')
-	            .attr('class', 'issue-info-button')
-	            .attr('title', _t('icons.information'))
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-inspect'));
-
-	        infoButton
-	            .on('click', function () {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                this.blur();    // avoid keeping focus on the button - #4641
-
-	                var container = select(this.parentNode.parentNode.parentNode);
-	                var info = container.selectAll('.issue-info');
-	                var isExpanded = info.classed('expanded');
-
-	                if (isExpanded) {
-	                    info
-	                        .transition()
-	                        .duration(200)
-	                        .style('max-height', '0px')
-	                        .style('opacity', '0')
-	                        .on('end', function () {
-	                            info.classed('expanded', false);
-	                        });
-	                } else {
-	                    info
-	                        .classed('expanded', true)
-	                        .transition()
-	                        .duration(200)
-	                        .style('max-height', '200px')
-	                        .style('opacity', '1')
-	                        .on('end', function () {
-	                            info.style('max-height', null);
-	                        });
-	                }
-	            });
+	        var isReverse = reverse(sub);
 
-	        itemsEnter
-	            .append('ul')
-	            .attr('class', 'issue-fix-list');
+	        if (isReverse) {
+	          sub = sub.reverse();
+	        }
 
-	        containersEnter
-	            .append('div')
-	            .attr('class', 'issue-info')
-	            .style('max-height', '0')
-	            .style('opacity', '0')
-	            .each(function(d) {
-	                if (typeof d.reference === 'function') {
-	                    select(this)
-	                        .call(d.reference);
-	                } else {
-	                    select(this)
-	                        .text(_t('inspector.no_documentation_key'));
-	                }
-	            });
+	        var bboxes = [];
+	        var boxsize = (height + 2) / 2;
 
+	        for (var j = 0; j < sub.length - 1; j++) {
+	          var a = sub[j];
+	          var b = sub[j + 1]; // split up the text into small collision boxes
 
-	        // Update
-	        containers = containers
-	            .merge(containersEnter)
-	            .classed('active', function(d) { return d.id === _activeIssueID; });
+	          var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
 
-	        containers.selectAll('.issue-message')
-	            .text(function(d) {
-	                return d.message(context);
+	          for (var box = 0; box < num; box++) {
+	            var p = geoVecInterp(a, b, box / num);
+	            var x0 = p[0] - boxsize - padding;
+	            var y0 = p[1] - boxsize - padding;
+	            var x1 = p[0] + boxsize + padding;
+	            var y1 = p[1] + boxsize + padding;
+	            bboxes.push({
+	              minX: Math.min(x0, x1),
+	              minY: Math.min(y0, y1),
+	              maxX: Math.max(x0, x1),
+	              maxY: Math.max(y0, y1)
 	            });
+	          }
+	        }
 
-	        // fixes
-	        var fixLists = containers.selectAll('.issue-fix-list');
+	        if (tryInsert(bboxes, entity.id, false)) {
+	          // accept this one
+	          return {
+	            'font-size': height + 2,
+	            lineString: lineString(sub),
+	            startOffset: offset + '%'
+	          };
+	        }
+	      }
 
-	        var fixes = fixLists.selectAll('.issue-fix-item')
-	            .data(function(d) { return d.fixes ? d.fixes(context) : []; }, function(fix) { return fix.id; });
+	      function reverse(p) {
+	        var angle = Math.atan2(p[1][1] - p[0][1], p[1][0] - p[0][0]);
+	        return !(p[0][0] < p[p.length - 1][0] && angle < Math.PI / 2 && angle > -Math.PI / 2);
+	      }
 
-	        fixes.exit()
-	            .remove();
+	      function lineString(points) {
+	        return 'M' + points.join('L');
+	      }
 
-	        var fixesEnter = fixes.enter()
-	            .append('li')
-	            .attr('class', 'issue-fix-item')
-	            .on('click', function(d) {
-	                // not all fixes are actionable
-	                if (!select(this).classed('actionable') || !d.onClick) { return; }
+	      function subpath(points, from, to) {
+	        var sofar = 0;
+	        var start, end, i0, i1;
 
-	                // Don't run another fix for this issue within a second of running one
-	                // (Necessary for "Select a feature type" fix. Most fixes should only ever run once)
-	                if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) { return; }
-	                d.issue.dateLastRanFix = new Date();
+	        for (var i = 0; i < points.length - 1; i++) {
+	          var a = points[i];
+	          var b = points[i + 1];
+	          var current = geoVecLength(a, b);
+	          var portion;
 
-	                // remove hover-highlighting
-	                utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
+	          if (!start && sofar + current >= from) {
+	            portion = (from - sofar) / current;
+	            start = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
+	            i0 = i + 1;
+	          }
 
-	                new Promise(function(resolve, reject) {
-	                    d.onClick(context, resolve, reject);
-	                    if (d.onClick.length <= 1) {
-	                        // if the fix doesn't take any completion parameters then consider it resolved
-	                        resolve();
-	                    }
-	                })
-	                .then(function() {
-	                    // revalidate whenever the fix has finished running successfully
-	                    context.validator().validate();
-	                });
-	            })
-	            .on('mouseover.highlight', function(d) {
-	                utilHighlightEntities(d.entityIds, true, context);
-	            })
-	            .on('mouseout.highlight', function(d) {
-	                utilHighlightEntities(d.entityIds, false, context);
-	            });
+	          if (!end && sofar + current >= to) {
+	            portion = (to - sofar) / current;
+	            end = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
+	            i1 = i + 1;
+	          }
 
-	        fixesEnter
-	            .append('span')
-	            .attr('class', 'fix-icon')
-	            .each(function(d) {
-	                var iconName = d.icon || 'iD-icon-wrench';
-	                if (iconName.startsWith('maki')) {
-	                    iconName += '-15';
-	                }
-	                select(this).call(svgIcon('#' + iconName));
-	            });
+	          sofar += current;
+	        }
 
-	        fixesEnter
-	            .append('span')
-	            .attr('class', 'fix-message')
-	            .text(function(d) { return d.title; });
-
-	        fixesEnter.merge(fixes)
-	            .classed('actionable', function(d) {
-	                return d.onClick;
-	            })
-	            .attr('title', function(d) {
-	                if (d.disabledReason) {
-	                    return d.disabledReason;
-	                }
-	                return null;
-	            });
+	        var result = points.slice(i0, i1);
+	        result.unshift(start);
+	        result.push(end);
+	        return result;
+	      }
 	    }
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-	            _entityIDs = val;
-	            _activeIssueID = null;
-	            reloadIssues();
+	    function getAreaLabel(entity, width, height) {
+	      var centroid = path.centroid(entity.asGeoJSON(graph, true));
+	      var extent = entity.extent(graph);
+	      var areaWidth = projection(extent[1])[0] - projection(extent[0])[0];
+	      if (isNaN(centroid[0]) || areaWidth < 20) return;
+	      var preset = _mainPresetIndex.match(entity, context.graph());
+	      var picon = preset && preset.icon;
+	      var iconSize = 17;
+	      var padding = 2;
+	      var p = {};
+
+	      if (picon) {
+	        // icon and label..
+	        if (addIcon()) {
+	          addLabel(iconSize + padding);
+	          return p;
 	        }
-	        return section;
-	    };
+	      } else {
+	        // label only..
+	        if (addLabel(0)) {
+	          return p;
+	        }
+	      }
 
-	    return section;
-	}
+	      function addIcon() {
+	        var iconX = centroid[0] - iconSize / 2;
+	        var iconY = centroid[1] - iconSize / 2;
+	        var bbox = {
+	          minX: iconX,
+	          minY: iconY,
+	          maxX: iconX + iconSize,
+	          maxY: iconY + iconSize
+	        };
 
-	function uiPresetIcon() {
-	  var _preset;
-	  var _geometry;
-	  var _sizeClass = 'medium';
+	        if (tryInsert([bbox], entity.id + 'I', true)) {
+	          p.transform = 'translate(' + iconX + ',' + iconY + ')';
+	          return true;
+	        }
 
+	        return false;
+	      }
 
-	  function isSmall() {
-	    return _sizeClass === 'small';
-	  }
+	      function addLabel(yOffset) {
+	        if (width && areaWidth >= width + 20) {
+	          var labelX = centroid[0];
+	          var labelY = centroid[1] + yOffset;
+	          var bbox = {
+	            minX: labelX - width / 2 - padding,
+	            minY: labelY - height / 2 - padding,
+	            maxX: labelX + width / 2 + padding,
+	            maxY: labelY + height / 2 + padding
+	          };
 
+	          if (tryInsert([bbox], entity.id, true)) {
+	            p.x = labelX;
+	            p.y = labelY;
+	            p.textAnchor = 'middle';
+	            p.height = height;
+	            return true;
+	          }
+	        }
 
-	  function presetIcon(selection) {
-	    selection.each(render);
-	  }
+	        return false;
+	      }
+	    } // force insert a singular bounding box
+	    // singular box only, no array, id better be unique
 
 
-	  function getIcon(p, geom) {
-	    if (isSmall() && p.isFallback && p.isFallback())
-	      { return 'iD-icon-' + p.id; }
-	    else if (p.icon)
-	      { return p.icon; }
-	    else if (geom === 'line')
-	      { return 'iD-other-line'; }
-	    else if (geom === 'vertex')
-	      { return p.isFallback() ? '' : 'temaki-vertex'; }
-	    else if (isSmall() && geom === 'point')
-	      { return ''; }
-	    else
-	      { return 'maki-marker-stroked'; }
-	  }
-
-
-	  function renderPointBorder(enter) {
-	    var w = 40;
-	    var h = 40;
+	    function doInsert(bbox, id) {
+	      bbox.id = id;
+	      var oldbox = _entitybboxes[id];
 
-	    enter
-	      .append('svg')
-	      .attr('class', 'preset-icon-fill preset-icon-point-border')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h))
-	      .append('path')
-	      .attr('transform', 'translate(11.5, 8)')
-	      .attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
-	  }
+	      if (oldbox) {
+	        _rdrawn.remove(oldbox);
+	      }
 
+	      _entitybboxes[id] = bbox;
 
-	  function renderCircleFill(fillEnter) {
-	    var w = 60;
-	    var h = 60;
-	    var d = 40;
+	      _rdrawn.insert(bbox);
+	    }
 
-	    fillEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-fill preset-icon-fill-vertex')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h))
-	      .append('circle')
-	      .attr('cx', w / 2)
-	      .attr('cy', h / 2)
-	      .attr('r', d / 2);
-	  }
+	    function tryInsert(bboxes, id, saveSkipped) {
+	      var skipped = false;
 
+	      for (var i = 0; i < bboxes.length; i++) {
+	        var bbox = bboxes[i];
+	        bbox.id = id; // Check that label is visible
 
-	  function renderSquareFill(fillEnter) {
-	    var d = isSmall() ? 40 : 60;
-	    var w = d;
-	    var h = d;
-	    var l = d * 2/3;
-	    var c1 = (w-l) / 2;
-	    var c2 = c1 + l;
+	        if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
+	          skipped = true;
+	          break;
+	        }
 
-	    fillEnter = fillEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-fill preset-icon-fill-area')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h));
+	        if (_rdrawn.collides(bbox)) {
+	          skipped = true;
+	          break;
+	        }
+	      }
 
-	    ['fill', 'stroke'].forEach(function (klass) {
-	      fillEnter
-	        .append('path')
-	        .attr('d', ("M" + c1 + " " + c1 + " L" + c1 + " " + c2 + " L" + c2 + " " + c2 + " L" + c2 + " " + c1 + " Z"))
-	        .attr('class', ("line area " + klass));
-	    });
+	      _entitybboxes[id] = bboxes;
 
-	    var rVertex = 2.5;
-	    [[c1, c1], [c1, c2], [c2, c2], [c2, c1]].forEach(function (point) {
-	      fillEnter
-	        .append('circle')
-	        .attr('class', 'vertex')
-	        .attr('cx', point[0])
-	        .attr('cy', point[1])
-	        .attr('r', rVertex);
-	    });
+	      if (skipped) {
+	        if (saveSkipped) {
+	          _rskipped.load(bboxes);
+	        }
+	      } else {
+	        _rdrawn.load(bboxes);
+	      }
 
-	    if (!isSmall()) {
-	      var rMidpoint = 1.25;
-	      [[c1, w/2], [c2, w/2], [h/2, c1], [h/2, c2]].forEach(function (point) {
-	        fillEnter
-	          .append('circle')
-	          .attr('class', 'midpoint')
-	          .attr('cx', point[0])
-	          .attr('cy', point[1])
-	          .attr('r', rMidpoint);
-	      });
+	      return !skipped;
 	    }
-	  }
 
+	    var layer = selection.selectAll('.layer-osm.labels');
+	    layer.selectAll('.labels-group').data(['halo', 'label', 'debug']).enter().append('g').attr('class', function (d) {
+	      return 'labels-group ' + d;
+	    });
+	    var halo = layer.selectAll('.labels-group.halo');
+	    var label = layer.selectAll('.labels-group.label');
+	    var debug = layer.selectAll('.labels-group.debug'); // points
 
-	  function renderLine(lineEnter) {
-	    var d = isSmall() ? 40 : 60;
-	    // draw the line parametrically
-	    var w = d;
-	    var h = d;
-	    var y = Math.round(d * 0.72);
-	    var l = Math.round(d * 0.6);
-	    var r = 2.5;
-	    var x1 = (w - l) / 2;
-	    var x2 = x1 + l;
+	    drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
+	    drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines
 
-	    lineEnter = lineEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-line')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h));
+	    drawLinePaths(layer, labelled.line, filter, '', positions.line);
+	    drawLineLabels(label, labelled.line, filter, 'linelabel', positions.line);
+	    drawLineLabels(halo, labelled.line, filter, 'linelabel-halo', positions.line); // areas
 
-	    ['casing', 'stroke'].forEach(function (klass) {
-	      lineEnter
-	        .append('path')
-	        .attr('d', ("M" + x1 + " " + y + " L" + x2 + " " + y))
-	        .attr('class', ("line " + klass));
-	    });
+	    drawAreaLabels(label, labelled.area, filter, 'arealabel', positions.area);
+	    drawAreaLabels(halo, labelled.area, filter, 'arealabel-halo', positions.area);
+	    drawAreaIcons(label, labelled.area, filter, 'areaicon', positions.area);
+	    drawAreaIcons(halo, labelled.area, filter, 'areaicon-halo', positions.area); // debug
 
-	    [[x1-1, y], [x2+1, y]].forEach(function (point) {
-	      lineEnter
-	        .append('circle')
-	        .attr('class', 'vertex')
-	        .attr('cx', point[0])
-	        .attr('cy', point[1])
-	        .attr('r', r);
-	    });
+	    drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
+	    drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
+	    layer.call(filterLabels);
 	  }
 
+	  function filterLabels(selection) {
+	    var drawLayer = selection.selectAll('.layer-osm.labels');
+	    var layers = drawLayer.selectAll('.labels-group.halo, .labels-group.label');
+	    layers.selectAll('.nolabel').classed('nolabel', false);
+	    var mouse = context.map().mouse();
+	    var graph = context.graph();
+	    var selectedIDs = context.selectedIDs();
+	    var ids = [];
+	    var pad, bbox; // hide labels near the mouse
+
+	    if (mouse) {
+	      pad = 20;
+	      bbox = {
+	        minX: mouse[0] - pad,
+	        minY: mouse[1] - pad,
+	        maxX: mouse[0] + pad,
+	        maxY: mouse[1] + pad
+	      };
 
-	  function renderRoute(routeEnter) {
-	    var d = isSmall() ? 40 : 60;
-	    // draw the route parametrically
-	    var w = d;
-	    var h = d;
-	    var y1 = Math.round(d * 0.80);
-	    var y2 = Math.round(d * 0.68);
-	    var l = Math.round(d * 0.6);
-	    var r = 2;
-	    var x1 = (w - l) / 2;
-	    var x2 = x1 + l / 3;
-	    var x3 = x2 + l / 3;
-	    var x4 = x3 + l / 3;
-
-	    routeEnter = routeEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-route')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h));
+	      var nearMouse = _rdrawn.search(bbox).map(function (entity) {
+	        return entity.id;
+	      });
 
-	    ['casing', 'stroke'].forEach(function (klass) {
-	      routeEnter
-	        .append('path')
-	        .attr('d', ("M" + x1 + " " + y1 + " L" + x2 + " " + y2))
-	        .attr('class', ("segment0 line " + klass));
-	      routeEnter
-	        .append('path')
-	        .attr('d', ("M" + x2 + " " + y2 + " L" + x3 + " " + y1))
-	        .attr('class', ("segment1 line " + klass));
-	      routeEnter
-	        .append('path')
-	        .attr('d', ("M" + x3 + " " + y1 + " L" + x4 + " " + y2))
-	        .attr('class', ("segment2 line " + klass));
-	    });
+	      ids.push.apply(ids, nearMouse);
+	    } // hide labels on selected nodes (they look weird when dragging / haloed)
 
-	    [[x1, y1], [x2, y2], [x3, y1], [x4, y2]].forEach(function (point) {
-	      routeEnter
-	        .append('circle')
-	        .attr('class', 'vertex')
-	        .attr('cx', point[0])
-	        .attr('cy', point[1])
-	        .attr('r', r);
-	    });
-	  }
 
+	    for (var i = 0; i < selectedIDs.length; i++) {
+	      var entity = graph.hasEntity(selectedIDs[i]);
 
-	  // Route icons are drawn with a zigzag annotation underneath:
-	  //     o   o
-	  //    / \ /
-	  //   o   o
-	  // This dataset defines the styles that are used to draw the zigzag segments.
-	  var routeSegments = {
-	    bicycle: ['highway/cycleway', 'highway/cycleway', 'highway/cycleway'],
-	    bus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
-	    trolleybus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
-	    detour: ['highway/tertiary', 'highway/residential', 'highway/unclassified'],
-	    ferry: ['route/ferry', 'route/ferry', 'route/ferry'],
-	    foot: ['highway/footway', 'highway/footway', 'highway/footway'],
-	    hiking: ['highway/path', 'highway/path', 'highway/path'],
-	    horse: ['highway/bridleway', 'highway/bridleway', 'highway/bridleway'],
-	    light_rail: ['railway/light_rail', 'railway/light_rail', 'railway/light_rail'],
-	    monorail: ['railway/monorail', 'railway/monorail', 'railway/monorail'],
-	    pipeline: ['man_made/pipeline', 'man_made/pipeline', 'man_made/pipeline'],
-	    piste: ['piste/downhill', 'piste/hike', 'piste/nordic'],
-	    power: ['power/line', 'power/line', 'power/line'],
-	    road: ['highway/secondary', 'highway/primary', 'highway/trunk'],
-	    subway: ['railway/subway', 'railway/subway', 'railway/subway'],
-	    train: ['railway/rail', 'railway/rail', 'railway/rail'],
-	    tram: ['railway/tram', 'railway/tram', 'railway/tram'],
-	    waterway: ['waterway/stream', 'waterway/stream', 'waterway/stream']
-	  };
+	      if (entity && entity.type === 'node') {
+	        ids.push(selectedIDs[i]);
+	      }
+	    }
 
+	    layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..
 
-	  function render() {
-	    var p = _preset.apply(this, arguments);
-	    var geom = _geometry ? _geometry.apply(this, arguments) : null;
-	    if (geom === 'relation' && p.tags && ((p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route]) || p.tags.type === 'waterway')) {
-	      geom = 'route';
+	    var debug = selection.selectAll('.labels-group.debug');
+	    var gj = [];
+
+	    if (context.getDebug('collision')) {
+	      gj = bbox ? [{
+	        type: 'Polygon',
+	        coordinates: [[[bbox.minX, bbox.minY], [bbox.maxX, bbox.minY], [bbox.maxX, bbox.maxY], [bbox.minX, bbox.maxY], [bbox.minX, bbox.minY]]]
+	      }] : [];
 	    }
 
-	    var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
-	    var isFallback = isSmall() && p.isFallback && p.isFallback();
-	    var imageURL = (showThirdPartyIcons === 'true') && p.imageURL;
-	    var picon = getIcon(p, geom);
-	    var isMaki = picon && /^maki-/.test(picon);
-	    var isTemaki = picon && /^temaki-/.test(picon);
-	    var isFa = picon && /^fa[srb]-/.test(picon);
-	    var isTnp = picon && /^tnp-/.test(picon);
-	    var isiDIcon = picon && !(isMaki || isTemaki || isFa || isTnp);
-	    var isCategory = !p.setTags;
-	    var drawPoint = picon && geom === 'point' && isSmall() && !isFallback;
-	    var drawVertex = picon !== null && geom === 'vertex' && (!isSmall() || !isFallback);
-	    var drawLine = picon && geom === 'line' && !isFallback && !isCategory;
-	    var drawArea = picon && geom === 'area' && !isFallback;
-	    var drawRoute = picon && geom === 'route';
-	    var isFramed = (drawVertex || drawArea || drawLine || drawRoute);
+	    var box = debug.selectAll('.debug-mouse').data(gj); // exit
 
-	    var tags = !isCategory ? p.setTags({}, geom) : {};
-	    for (var k in tags) {
-	      if (tags[k] === '*') {
-	        tags[k] = 'yes';
-	      }
-	    }
+	    box.exit().remove(); // enter/update
 
-	    var tagClasses = svgTagClasses().getClassesString(tags, '');
-	    var selection = select(this);
+	    box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
+	  }
 
-	    var container = selection.selectAll('.preset-icon-container')
-	      .data([0]);
+	  var throttleFilterLabels = throttle(filterLabels, 100);
 
-	    container = container.enter()
-	      .append('div')
-	      .attr('class', ("preset-icon-container " + _sizeClass))
-	      .merge(container);
+	  drawLabels.observe = function (selection) {
+	    var listener = function listener() {
+	      throttleFilterLabels(selection);
+	    };
 
-	    container
-	      .classed('showing-img', !!imageURL)
-	      .classed('fallback', isFallback);
+	    selection.on('mousemove.hidelabels', listener);
+	    context.on('enter.hidelabels', listener);
+	  };
 
+	  drawLabels.off = function (selection) {
+	    throttleFilterLabels.cancel();
+	    selection.on('mousemove.hidelabels', null);
+	    context.on('enter.hidelabels', null);
+	  };
 
-	    var pointBorder = container.selectAll('.preset-icon-point-border')
-	      .data(drawPoint ? [0] : []);
+	  return drawLabels;
+	}
 
-	    pointBorder.exit()
-	      .remove();
+	var _layerEnabled$1 = false;
 
-	    var pointBorderEnter = pointBorder.enter();
-	    renderPointBorder(pointBorderEnter);
-	    pointBorder = pointBorderEnter.merge(pointBorder);
+	var _qaService$1;
 
+	function svgImproveOSM(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
-	    var vertexFill = container.selectAll('.preset-icon-fill-vertex')
-	      .data(drawVertex ? [0] : []);
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var layerVisible = false;
 
-	    vertexFill.exit()
-	      .remove();
+	  function markerPath(selection, klass) {
+	    selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	  } // Loosely-coupled improveOSM service for fetching issues
 
-	    var vertexFillEnter = vertexFill.enter();
-	    renderCircleFill(vertexFillEnter);
-	    vertexFill = vertexFillEnter.merge(vertexFill);
 
+	  function getService() {
+	    if (services.improveOSM && !_qaService$1) {
+	      _qaService$1 = services.improveOSM;
 
-	    var fill = container.selectAll('.preset-icon-fill-area')
-	      .data(drawArea ? [0] : []);
+	      _qaService$1.on('loaded', throttledRedraw);
+	    } else if (!services.improveOSM && _qaService$1) {
+	      _qaService$1 = null;
+	    }
 
-	    fill.exit()
-	      .remove();
+	    return _qaService$1;
+	  } // Show the markers
 
-	    var fillEnter = fill.enter();
-	    renderSquareFill(fillEnter);
-	    fill = fillEnter.merge(fill);
 
-	    fill.selectAll('path.stroke')
-	      .attr('class', ("area stroke " + tagClasses));
-	    fill.selectAll('path.fill')
-	      .attr('class', ("area fill " + tagClasses));
+	  function editOn() {
+	    if (!layerVisible) {
+	      layerVisible = true;
+	      drawLayer.style('display', 'block');
+	    }
+	  } // Immediately remove the markers and their touch targets
 
 
-	    var line = container.selectAll('.preset-icon-line')
-	      .data(drawLine ? [0] : []);
+	  function editOff() {
+	    if (layerVisible) {
+	      layerVisible = false;
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.qaItem.improveOSM').remove();
+	      touchLayer.selectAll('.qaItem.improveOSM').remove();
+	    }
+	  } // Enable the layer.  This shows the markers and transitions them to visible.
 
-	    line.exit()
-	      .remove();
 
-	    var lineEnter = line.enter();
-	    renderLine(lineEnter);
-	    line = lineEnter.merge(line);
+	  function layerOn() {
+	    editOn();
+	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      return dispatch.call('change');
+	    });
+	  } // Disable the layer.  This transitions the layer invisible and then hides the markers.
 
-	    line.selectAll('path.stroke')
-	      .attr('class', ("line stroke " + tagClasses));
-	    line.selectAll('path.casing')
-	      .attr('class', ("line casing " + tagClasses));
 
+	  function layerOff() {
+	    throttledRedraw.cancel();
+	    drawLayer.interrupt();
+	    touchLayer.selectAll('.qaItem.improveOSM').remove();
+	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      editOff();
+	      dispatch.call('change');
+	    });
+	  } // Update the issue markers
 
-	    var route = container.selectAll('.preset-icon-route')
-	      .data(drawRoute ? [0] : []);
 
-	    route.exit()
-	      .remove();
+	  function updateMarkers() {
+	    if (!layerVisible || !_layerEnabled$1) return;
+	    var service = getService();
+	    var selectedID = context.selectedErrorID();
+	    var data = service ? service.getItems(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	    var routeEnter = route.enter();
-	    renderRoute(routeEnter);
-	    route = routeEnter.merge(route);
+	    var markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    if (drawRoute) {
-	      var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
-	      var segmentPresetIDs = routeSegments[routeType];
-	      for (var i in segmentPresetIDs) {
-	        var segmentPreset = _mainPresetIndex.item(segmentPresetIDs[i]);
-	        var segmentTagClasses = svgTagClasses().getClassesString(segmentPreset.tags, '');
-	        route.selectAll(("path.stroke.segment" + i))
-	          .attr('class', ("segment" + i + " line stroke " + segmentTagClasses));
-	        route.selectAll(("path.casing.segment" + i))
-	          .attr('class', ("segment" + i + " line casing " + segmentTagClasses));
+	    markers.exit().remove(); // enter
+
+	    var markersEnter = markers.enter().append('g').attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	    });
+	    markersEnter.append('polygon').call(markerPath, 'shadow');
+	    markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
+	    markersEnter.append('polygon').attr('fill', 'currentColor').call(markerPath, 'qaItem-fill');
+	    markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
+	      var picon = d.icon;
+
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
 	      }
-	    }
+	    }); // update
 
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
-	    var icon = container.selectAll('.preset-icon')
-	      .data(picon ? [0] : []);
+	    if (touchLayer.empty()) return;
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var targets = touchLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	    icon.exit()
-	      .remove();
+	    targets.exit().remove(); // enter/update
 
-	    icon = icon.enter()
-	      .append('div')
-	      .attr('class', 'preset-icon')
-	      .call(svgIcon(''))
-	      .merge(icon);
+	    targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+	    }).attr('transform', getTransform);
 
-	    icon
-	      .attr('class', 'preset-icon ' + (geom ? geom + '-geom' : ''))
-	      .classed('framed', isFramed)
-	      .classed('preset-icon-iD', isiDIcon);
+	    function sortY(a, b) {
+	      return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
+	    }
+	  } // Draw the ImproveOSM layer and schedule loading issues and updating markers.
 
-	    icon.selectAll('svg')
-	      .attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line'  ? '' : tagClasses));
 
-	    icon.selectAll('use')
-	      .attr('href', '#' + picon + (isMaki ? (isSmall() && geom === 'point' ? '-11' : '-15') : ''));
+	  function drawImproveOSM(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	    var imageIcon = container.selectAll('img.image-icon')
-	      .data(imageURL ? [0] : []);
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
-	    imageIcon.exit()
-	      .remove();
+	    drawLayer = selection.selectAll('.layer-improveOSM').data(service ? [0] : []);
+	    drawLayer.exit().remove();
+	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-improveOSM').style('display', _layerEnabled$1 ? 'block' : 'none').merge(drawLayer);
 
-	    imageIcon = imageIcon.enter()
-	      .append('img')
-	      .attr('class', 'image-icon')
-	      .on('load', function () { return container.classed('showing-img', true); } )
-	      .on('error', function () { return container.classed('showing-img', false); } )
-	      .merge(imageIcon);
+	    if (_layerEnabled$1) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadIssues(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
-	    imageIcon
-	      .attr('src', imageURL);
-	  }
 
+	  drawImproveOSM.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled$1;
+	    _layerEnabled$1 = val;
 
-	  presetIcon.preset = function(val) {
-	    if (!arguments.length) { return _preset; }
-	    _preset = utilFunctor(val);
-	    return presetIcon;
-	  };
+	    if (_layerEnabled$1) {
+	      layerOn();
+	    } else {
+	      layerOff();
 
+	      if (context.selectedErrorID()) {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
 
-	  presetIcon.geometry = function(val) {
-	    if (!arguments.length) { return _geometry; }
-	    _geometry = utilFunctor(val);
-	    return presetIcon;
+	    dispatch.call('change');
+	    return this;
 	  };
 
-
-	  presetIcon.sizeClass = function(val) {
-	    if (!arguments.length) { return _sizeClass; }
-	    _sizeClass = val;
-	    return presetIcon;
+	  drawImproveOSM.supported = function () {
+	    return !!getService();
 	  };
 
-	  return presetIcon;
+	  return drawImproveOSM;
 	}
 
-	function uiSectionFeatureType(context) {
-
-	    var dispatch$1 = dispatch('choose');
+	var _layerEnabled$2 = false;
 
-	    var _entityIDs = [];
-	    var _presets = [];
+	var _qaService$2;
 
-	    var _tagReference;
+	function svgOsmose(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
-	    var section = uiSection('feature-type', context)
-	        .title(_t('inspector.feature_type'))
-	        .disclosureContent(renderDisclosureContent);
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var layerVisible = false;
 
-	    function renderDisclosureContent(selection) {
+	  function markerPath(selection, klass) {
+	    selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+	  } // Loosely-coupled osmose service for fetching issues
 
-	        selection.classed('preset-list-item', true);
-	        selection.classed('mixed-types', _presets.length > 1);
 
-	        var presetButtonWrap = selection
-	            .selectAll('.preset-list-button-wrap')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'preset-list-button-wrap');
+	  function getService() {
+	    if (services.osmose && !_qaService$2) {
+	      _qaService$2 = services.osmose;
 
-	        var presetButton = presetButtonWrap
-	            .append('button')
-	            .attr('class', 'preset-list-button preset-reset')
-	            .call(uiTooltip()
-	                .title(_t('inspector.back_tooltip'))
-	                .placement('bottom')
-	            );
+	      _qaService$2.on('loaded', throttledRedraw);
+	    } else if (!services.osmose && _qaService$2) {
+	      _qaService$2 = null;
+	    }
 
-	        presetButton.append('div')
-	            .attr('class', 'preset-icon-container');
+	    return _qaService$2;
+	  } // Show the markers
 
-	        presetButton
-	            .append('div')
-	            .attr('class', 'label')
-	            .append('div')
-	            .attr('class', 'label-inner');
 
-	        presetButtonWrap.append('div')
-	            .attr('class', 'accessory-buttons');
+	  function editOn() {
+	    if (!layerVisible) {
+	      layerVisible = true;
+	      drawLayer.style('display', 'block');
+	    }
+	  } // Immediately remove the markers and their touch targets
 
-	        var tagReferenceBodyWrap = selection
-	            .selectAll('.tag-reference-body-wrap')
-	            .data([0]);
 
-	        tagReferenceBodyWrap = tagReferenceBodyWrap
-	            .enter()
-	            .append('div')
-	            .attr('class', 'tag-reference-body-wrap')
-	            .merge(tagReferenceBodyWrap);
-
-	        // update header
-	        if (_tagReference) {
-	            selection.selectAll('.preset-list-button-wrap .accessory-buttons')
-	                .style('display', _presets.length === 1 ? null : 'none')
-	                .call(_tagReference.button);
-
-	            tagReferenceBodyWrap
-	                .style('display', _presets.length === 1 ? null : 'none')
-	                .call(_tagReference.body);
-	        }
-
-	        selection.selectAll('.preset-reset')
-	            .on('click', function() {
-	                 dispatch$1.call('choose', this, _presets);
-	            })
-	            .on('pointerdown pointerup mousedown mouseup', function() {
-	                event.preventDefault();
-	                event.stopPropagation();
-	            });
+	  function editOff() {
+	    if (layerVisible) {
+	      layerVisible = false;
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.qaItem.osmose').remove();
+	      touchLayer.selectAll('.qaItem.osmose').remove();
+	    }
+	  } // Enable the layer.  This shows the markers and transitions them to visible.
 
-	        var geometries = entityGeometries();
-	        selection.select('.preset-list-item button')
-	            .call(uiPresetIcon()
-	                .geometry(_presets.length === 1 ? (geometries.length === 1 && geometries[0]) : null)
-	                .preset(_presets.length === 1 ? _presets[0] : _mainPresetIndex.item('point'))
-	            );
 
-	        // NOTE: split on en-dash, not a hypen (to avoid conflict with hyphenated names)
-	        var names = _presets.length === 1 ? _presets[0].name().split(' – ') : [_t('inspector.multiple_types')];
+	  function layerOn() {
+	    editOn();
+	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      return dispatch.call('change');
+	    });
+	  } // Disable the layer.  This transitions the layer invisible and then hides the markers.
 
-	        var label = selection.select('.label-inner');
-	        var nameparts = label.selectAll('.namepart')
-	            .data(names, function(d) { return d; });
 
-	        nameparts.exit()
-	            .remove();
+	  function layerOff() {
+	    throttledRedraw.cancel();
+	    drawLayer.interrupt();
+	    touchLayer.selectAll('.qaItem.osmose').remove();
+	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      editOff();
+	      dispatch.call('change');
+	    });
+	  } // Update the issue markers
 
-	        nameparts
-	            .enter()
-	            .append('div')
-	            .attr('class', 'namepart')
-	            .text(function(d) { return d; });
-	    }
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return section;
-	    };
+	  function updateMarkers() {
+	    if (!layerVisible || !_layerEnabled$2) return;
+	    var service = getService();
+	    var selectedID = context.selectedErrorID();
+	    var data = service ? service.getItems(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	    section.presets = function(val) {
-	        if (!arguments.length) { return _presets; }
+	    var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	        // don't reload the same preset
-	        if (!utilArrayIdentical(val, _presets)) {
-	            _presets = val;
+	    markers.exit().remove(); // enter
 
-	            var geometries = entityGeometries();
-	            if (_presets.length === 1 && geometries.length) {
-	                _tagReference = uiTagReference(_presets[0].reference(geometries[0]))
-	                    .showing(false);
-	            }
-	        }
+	    var markersEnter = markers.enter().append('g').attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+	    });
+	    markersEnter.append('polygon').call(markerPath, 'shadow');
+	    markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
+	    markersEnter.append('polygon').attr('fill', function (d) {
+	      return service.getColor(d.item);
+	    }).call(markerPath, 'qaItem-fill');
+	    markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
+	      var picon = d.icon;
+
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return "#".concat(picon).concat(isMaki ? '-11' : '');
+	      }
+	    }); // update
 
-	        return section;
-	    };
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
-	    function entityGeometries() {
+	    if (touchLayer.empty()) return;
+	    var fillClass = context.getDebug('target') ? 'pink' : 'nocolor';
+	    var targets = touchLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	        var counts = {};
+	    targets.exit().remove(); // enter/update
 
-	        for (var i in _entityIDs) {
-	            var geometry = context.graph().geometry(_entityIDs[i]);
-	            if (!counts[geometry]) { counts[geometry] = 0; }
-	            counts[geometry] += 1;
-	        }
+	    targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
+	      return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+	    }).attr('transform', getTransform);
 
-	        return Object.keys(counts).sort(function(geom1, geom2) {
-	            return counts[geom2] - counts[geom1];
-	        });
+	    function sortY(a, b) {
+	      return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
 	    }
+	  } // Draw the Osmose layer and schedule loading issues and updating markers.
 
-	    return utilRebind(section, dispatch$1, 'on');
-	}
 
-	// This currently only works with the 'restrictions' field
-	// It borrows some code from uiHelp
+	  function drawOsmose(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	function uiFieldHelp(context, fieldName) {
-	    var fieldHelp = {};
-	    var _inspector = select(null);
-	    var _wrap = select(null);
-	    var _body = select(null);
-
-	    var fieldHelpKeys = {
-	        restrictions: [
-	            ['about',[
-	                'about',
-	                'from_via_to',
-	                'maxdist',
-	                'maxvia'
-	            ]],
-	            ['inspecting',[
-	                'about',
-	                'from_shadow',
-	                'allow_shadow',
-	                'restrict_shadow',
-	                'only_shadow',
-	                'restricted',
-	                'only'
-	            ]],
-	            ['modifying',[
-	                'about',
-	                'indicators',
-	                'allow_turn',
-	                'restrict_turn',
-	                'only_turn'
-	            ]],
-	            ['tips',[
-	                'simple',
-	                'simple_example',
-	                'indirect',
-	                'indirect_example',
-	                'indirect_noedit'
-	            ]]
-	        ]
-	    };
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
-	    var fieldHelpHeadings = {};
+	    drawLayer = selection.selectAll('.layer-osmose').data(service ? [0] : []);
+	    drawLayer.exit().remove();
+	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-osmose').style('display', _layerEnabled$2 ? 'block' : 'none').merge(drawLayer);
 
-	    var replacements = {
-	        distField: _t('restriction.controls.distance'),
-	        viaField: _t('restriction.controls.via'),
-	        fromShadow: icon('#iD-turn-shadow', 'pre-text shadow from'),
-	        allowShadow: icon('#iD-turn-shadow', 'pre-text shadow allow'),
-	        restrictShadow: icon('#iD-turn-shadow', 'pre-text shadow restrict'),
-	        onlyShadow: icon('#iD-turn-shadow', 'pre-text shadow only'),
-	        allowTurn: icon('#iD-turn-yes', 'pre-text turn'),
-	        restrictTurn: icon('#iD-turn-no', 'pre-text turn'),
-	        onlyTurn: icon('#iD-turn-only', 'pre-text turn')
-	    };
+	    if (_layerEnabled$2) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadIssues(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
 
-	    // For each section, squash all the texts into a single markdown document
-	    var docs = fieldHelpKeys[fieldName].map(function(key) {
-	        var helpkey = 'help.field.' + fieldName + '.' + key[0];
-	        var text = key[1].reduce(function(all, part) {
-	            var subkey = helpkey + '.' + part;
-	            var depth = fieldHelpHeadings[subkey];                     // is this subkey a heading?
-	            var hhh = depth ? Array(depth + 1).join('#') + ' ' : '';   // if so, prepend with some ##'s
-	            return all + hhh + _t(subkey, replacements) + '\n\n';
-	        }, '');
+	  drawOsmose.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled$2;
+	    _layerEnabled$2 = val;
 
-	        return {
-	            key: helpkey,
-	            title: _t(helpkey + '.title'),
-	            html: marked_1(text.trim())
-	        };
-	    });
+	    if (_layerEnabled$2) {
+	      // Strings supplied by Osmose fetched before showing layer for first time
+	      // NOTE: Currently no way to change locale in iD at runtime, would need to re-call this method if that's ever implemented
+	      // Also, If layer is toggled quickly multiple requests are sent
+	      getService().loadStrings().then(layerOn)["catch"](function (err) {
+	        console.log(err); // eslint-disable-line no-console
+	      });
+	    } else {
+	      layerOff();
+
+	      if (context.selectedErrorID()) {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    function show() {
-	        updatePosition();
+	  drawOsmose.supported = function () {
+	    return !!getService();
+	  };
 
-	        _body
-	            .classed('hide', false)
-	            .style('opacity', '0')
-	            .transition()
-	            .duration(200)
-	            .style('opacity', '1');
-	    }
+	  return drawOsmose;
+	}
 
+	function svgStreetside(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	    function hide() {
-	        _body
-	            .classed('hide', true)
-	            .transition()
-	            .duration(200)
-	            .style('opacity', '0')
-	            .on('end', function () {
-	                _body.classed('hide', true);
-	            });
-	    }
+	  var minZoom = 14;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
+	  var _viewerYaw = 0;
+	  var _selectedSequence = null;
 
+	  var _streetside;
+	  /**
+	   * init().
+	   */
 
-	    function clickHelp(index) {
-	        var d = docs[index];
-	        var tkeys = fieldHelpKeys[fieldName][index][1];
 
-	        _body.selectAll('.field-help-nav-item')
-	            .classed('active', function(d, i) { return i === index; });
+	  function init() {
+	    if (svgStreetside.initialized) return; // run once
 
-	        var content = _body.selectAll('.field-help-content')
-	            .html(d.html);
+	    svgStreetside.enabled = false;
+	    svgStreetside.initialized = true;
+	  }
+	  /**
+	   * getService().
+	   */
 
-	        // class the paragraphs so we can find and style them
-	        content.selectAll('p')
-	            .attr('class', function(d, i) { return tkeys[i]; });
 
-	        // insert special content for certain help sections
-	        if (d.key === 'help.field.restrictions.inspecting') {
-	            content
-	                .insert('img', 'p.from_shadow')
-	                .attr('class', 'field-help-image cf')
-	                .attr('src', context.imagePath('tr_inspect.gif'));
+	  function getService() {
+	    if (services.streetside && !_streetside) {
+	      _streetside = services.streetside;
 
-	        } else if (d.key === 'help.field.restrictions.modifying') {
-	            content
-	                .insert('img', 'p.allow_turn')
-	                .attr('class', 'field-help-image cf')
-	                .attr('src', context.imagePath('tr_modify.gif'));
-	        }
+	      _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
+	    } else if (!services.streetside && _streetside) {
+	      _streetside = null;
 	    }
 
+	    return _streetside;
+	  }
+	  /**
+	   * showLayer().
+	   */
 
-	    fieldHelp.button = function(selection) {
-	        if (_body.empty()) { return; }
 
-	        var button = selection.selectAll('.field-help-button')
-	            .data([0]);
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    editOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
+	  /**
+	   * hideLayer().
+	   */
 
-	        // enter/update
-	        button.enter()
-	            .append('button')
-	            .attr('class', 'field-help-button')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-help'))
-	            .merge(button)
-	            .on('click', function () {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                if (_body.classed('hide')) {
-	                    show();
-	                } else {
-	                    hide();
-	                }
-	            });
-	    };
 
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
+	  /**
+	   * editOn().
+	   */
 
-	    function updatePosition() {
-	        var wrap = _wrap.node();
-	        var inspector = _inspector.node();
-	        var wRect = wrap.getBoundingClientRect();
-	        var iRect = inspector.getBoundingClientRect();
 
-	        _body
-	            .style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
-	    }
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
+	  /**
+	   * editOff().
+	   */
 
 
-	    fieldHelp.body = function(selection) {
-	        // This control expects the field to have a form-field-input-wrap div
-	        _wrap = selection.selectAll('.form-field-input-wrap');
-	        if (_wrap.empty()) { return; }
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
+	  /**
+	   * click() Handles 'bubble' point click event.
+	   */
 
-	        // absolute position relative to the inspector, so it "floats" above the fields
-	        _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
-	        if (_inspector.empty()) { return; }
 
-	        _body = _inspector.selectAll('.field-help-body')
-	            .data([0]);
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return; // try to preserve the viewer rotation when staying on the same sequence
 
-	        var enter = _body.enter()
-	            .append('div')
-	            .attr('class', 'field-help-body hide');   // initially hidden
+	    if (d.sequenceKey !== _selectedSequence) {
+	      _viewerYaw = 0; // reset
+	    }
 
-	        var titleEnter = enter
-	            .append('div')
-	            .attr('class', 'field-help-title cf');
-
-	        titleEnter
-	            .append('h2')
-	            .attr('class', ((_mainLocalizer.textDirection() === 'rtl') ? 'fr' : 'fl'))
-	            .text(_t('help.field.' + fieldName + '.title'));
-
-	        titleEnter
-	            .append('button')
-	            .attr('class', 'fr close')
-	            .on('click', function() {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                hide();
-	            })
-	            .call(svgIcon('#iD-icon-close'));
-
-	        var navEnter = enter
-	            .append('div')
-	            .attr('class', 'field-help-nav cf');
+	    _selectedSequence = d.sequenceKey;
+	    service.ensureViewerLoaded(context).then(function () {
+	      service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
+	    });
+	    context.map().centerEase(d.loc);
+	  }
+	  /**
+	   * mouseover().
+	   */
 
-	        var titles = docs.map(function(d) { return d.title; });
-	        navEnter.selectAll('.field-help-nav-item')
-	            .data(titles)
-	            .enter()
-	            .append('div')
-	            .attr('class', 'field-help-nav-item')
-	            .text(function(d) { return d; })
-	            .on('click', function(d, i) {
-	                event.stopPropagation();
-	                event.preventDefault();
-	                clickHelp(i);
-	            });
 
-	        enter
-	            .append('div')
-	            .attr('class', 'field-help-content');
+	  function mouseover(d3_event, d) {
+	    var service = getService();
+	    if (service) service.setStyles(context, d);
+	  }
+	  /**
+	   * mouseout().
+	   */
 
-	        _body = _body
-	            .merge(enter);
 
-	        clickHelp(0);
-	    };
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
+	  /**
+	   * transform().
+	   */
 
 
-	    return fieldHelp;
-	}
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
+	    var rot = d.ca + _viewerYaw;
 
-	function uiFieldCheck(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var options = field.strings && field.strings.options;
-	    var values = [];
-	    var texts = [];
+	    if (rot) {
+	      t += ' rotate(' + Math.floor(rot) + ',0,0)';
+	    }
+
+	    return t;
+	  }
 
-	    var _tags;
+	  function viewerChanged() {
+	    var service = getService();
+	    if (!service) return;
+	    var viewer = service.viewer();
+	    if (!viewer) return; // update viewfield rotation
 
-	    var input = select(null);
-	    var text = select(null);
-	    var label = select(null);
-	    var reverser = select(null);
+	    _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
+	    // e.g. during drags or easing.
 
-	    var _impliedYes;
-	    var _entityIDs = [];
-	    var _value;
+	    if (context.map().isTransformed()) return;
+	    layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
+	  }
 
+	  context.photos().on('change.streetside', update);
 
-	    if (options) {
-	        for (var k in options) {
-	            values.push(k === 'undefined' ? undefined : k);
-	            texts.push(field.t('options.' + k, { 'default': options[k] }));
-	        }
-	    } else {
-	        values = [undefined, 'yes'];
-	        texts = [_t('inspector.unknown'), _t('inspector.check.yes')];
-	        if (field.type !== 'defaultCheck') {
-	            values.push('no');
-	            texts.push(_t('inspector.check.no'));
-	        }
-	    }
+	  function filterBubbles(bubbles) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      bubbles = bubbles.filter(function (bubble) {
+	        return new Date(bubble.captured_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
-	    // Checks tags to see whether an undefined value is "Assumed to be Yes"
-	    function checkImpliedYes() {
-	        _impliedYes = (field.id === 'oneway_yes');
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      bubbles = bubbles.filter(function (bubble) {
+	        return new Date(bubble.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	        // hack: pretend `oneway` field is a `oneway_yes` field
-	        // where implied oneway tag exists (e.g. `junction=roundabout`) #2220, #1841
-	        if (field.id === 'oneway') {
-	            var entity = context.entity(_entityIDs[0]);
-	            for (var key in entity.tags) {
-	                if (key in osmOneWayTags && (entity.tags[key] in osmOneWayTags[key])) {
-	                    _impliedYes = true;
-	                    texts[0] = _t('presets.fields.oneway_yes.options.undefined');
-	                    break;
-	                }
-	            }
-	        }
+	    if (usernames) {
+	      bubbles = bubbles.filter(function (bubble) {
+	        return usernames.indexOf(bubble.captured_by) !== -1;
+	      });
 	    }
 
+	    return bubbles;
+	  }
+
+	  function filterSequences(sequences) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
+
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      sequences = sequences.filter(function (sequences) {
+	        return new Date(sequences.properties.captured_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
-	    function reverserHidden() {
-	        if (!context.container().select('div.inspector-hover').empty()) { return true; }
-	        return !(_value === 'yes' || (_impliedYes && !_value));
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      sequences = sequences.filter(function (sequences) {
+	        return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
+	      });
 	    }
 
+	    if (usernames) {
+	      sequences = sequences.filter(function (sequences) {
+	        return usernames.indexOf(sequences.properties.captured_by) !== -1;
+	      });
+	    }
 
-	    function reverserSetText(selection) {
-	        var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
-	        if (reverserHidden() || !entity) { return selection; }
+	    return sequences;
+	  }
+	  /**
+	   * update().
+	   */
 
-	        var first = entity.first();
-	        var last = entity.isClosed() ? entity.nodes[entity.nodes.length - 2] : entity.last();
-	        var pseudoDirection = first < last;
-	        var icon = pseudoDirection ? '#iD-icon-forward' : '#iD-icon-backward';
 
-	        selection.selectAll('.reverser-span')
-	            .text(_t('inspector.check.reverser'))
-	            .call(svgIcon(icon, 'inline'));
+	  function update() {
+	    var viewer = context.container().select('.photoviewer');
+	    var selected = viewer.empty() ? undefined : viewer.datum();
+	    var z = ~~context.map().zoom();
+	    var showMarkers = z >= minMarkerZoom;
+	    var showViewfields = z >= minViewfieldZoom;
+	    var service = getService();
+	    var sequences = [];
+	    var bubbles = [];
 
-	        return selection;
+	    if (context.photos().showsPanoramic()) {
+	      sequences = service ? service.sequences(projection) : [];
+	      bubbles = service && showMarkers ? service.bubbles(projection) : [];
+	      sequences = filterSequences(sequences);
+	      bubbles = filterBubbles(bubbles);
 	    }
 
+	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+	      return d.properties.key;
+	    }); // exit
 
-	    var check = function(selection) {
-	        checkImpliedYes();
+	    traces.exit().remove(); // enter/update
 
-	        label = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(bubbles, function (d) {
+	      // force reenter once bubbles are attached to a sequence
+	      return d.key + (d.sequenceKey ? 'v1' : 'v0');
+	    }); // exit
 
-	        var enter = label.enter()
-	            .append('label')
-	            .attr('class', 'form-field-input-wrap form-field-input-check');
+	    groups.exit().remove(); // enter
 
-	        enter
-	            .append('input')
-	            .property('indeterminate', field.type !== 'defaultCheck')
-	            .attr('type', 'checkbox')
-	            .attr('id', field.domId);
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-	        enter
-	            .append('span')
-	            .text(texts[0])
-	            .attr('class', 'value');
+	    var markers = groups.merge(groupsEnter).sort(function (a, b) {
+	      return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1];
+	    }).attr('transform', transform).select('.viewfield-scale');
+	    markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+	    var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+	    viewfields.exit().remove(); // viewfields may or may not be drawn...
+	    // but if they are, draw below the circles
 
-	        if (field.type === 'onewayCheck') {
-	            enter
-	                .append('a')
-	                .attr('class', 'reverser button' + (reverserHidden() ? ' hide' : ''))
-	                .attr('href', '#')
-	                .append('span')
-	                .attr('class', 'reverser-span');
-	        }
+	    viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
 
-	        label = label.merge(enter);
-	        input = label.selectAll('input');
-	        text = label.selectAll('span.value');
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	        input
-	            .on('click', function() {
-	                event.stopPropagation();
-	                var t = {};
+	      if (d.pano) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
+	    }
+	  }
+	  /**
+	   * drawImages()
+	   * drawImages is the method that is returned (and that runs) every time 'svgStreetside()' is called.
+	   * 'svgStreetside()' is called from index.js
+	   */
 
-	                if (Array.isArray(_tags[field.key])) {
-	                    if (values.indexOf('yes') !== -1) {
-	                        t[field.key] = 'yes';
-	                    } else {
-	                        t[field.key] = values[0];
-	                    }
-	                } else {
-	                    t[field.key] = values[(values.indexOf(_value) + 1) % values.length];
-	                }
 
-	                // Don't cycle through `alternating` or `reversible` states - #4970
-	                // (They are supported as translated strings, but should not toggle with clicks)
-	                if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
-	                    t[field.key] = values[0];
-	                }
+	  function drawImages(selection) {
+	    var enabled = svgStreetside.enabled;
+	    var service = getService();
+	    layer = selection.selectAll('.layer-streetside-images').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-streetside-images').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'sequences');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
+
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadBubbles(projection);
+	      } else {
+	        editOff();
+	      }
+	    }
+	  }
+	  /**
+	   * drawImages.enabled().
+	   */
 
-	                dispatch$1.call('change', this, t);
-	            });
 
-	        if (field.type === 'onewayCheck') {
-	            reverser = label.selectAll('.reverser');
-
-	            reverser
-	                .call(reverserSetText)
-	                .on('click', function() {
-	                    event.preventDefault();
-	                    event.stopPropagation();
-	                    context.perform(
-	                        function(graph) {
-	                            for (var i in _entityIDs) {
-	                                graph = actionReverse(_entityIDs[i])(graph);
-	                            }
-	                            return graph;
-	                        },
-	                        _t('operations.reverse.annotation')
-	                    );
-
-	                    // must manually revalidate since no 'change' event was called
-	                    context.validator().validate();
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgStreetside.enabled;
+	    svgStreetside.enabled = _;
 
-	                    select(this)
-	                        .call(reverserSetText);
-	                });
-	        }
-	    };
+	    if (svgStreetside.enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
+	  /**
+	   * drawImages.supported().
+	   */
 
-	    check.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return check;
-	    };
 
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
+
+	  init();
+	  return drawImages;
+	}
 
-	    check.tags = function(tags) {
+	function svgMapillaryImages(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	        _tags = tags;
+	  var minZoom = 12;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	        function isChecked(val) {
-	            return val !== 'no' && val !== '' && val !== undefined && val !== null;
-	        }
+	  var _mapillary;
 
-	        function textFor(val) {
-	            if (val === '') { val = undefined; }
-	            var index = values.indexOf(val);
-	            return (index !== -1 ? texts[index] : ('"' + val + '"'));
-	        }
+	  var viewerCompassAngle;
 
-	        checkImpliedYes();
+	  function init() {
+	    if (svgMapillaryImages.initialized) return; // run once
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	    svgMapillaryImages.enabled = false;
+	    svgMapillaryImages.initialized = true;
+	  }
 
-	        _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	        if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
-	            _value = 'yes';
-	        }
+	      _mapillary.event.on('loadedImages', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
+	    }
+
+	    return _mapillary;
+	  }
+
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    editOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
-	        input
-	            .property('indeterminate', isMixed || (field.type !== 'defaultCheck' && !_value))
-	            .property('checked', isChecked(_value));
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
 
-	        text
-	            .text(isMixed ? _t('inspector.multiple_values') : textFor(_value))
-	            .classed('mixed', isMixed);
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	        label
-	            .classed('set', !!_value);
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
-	        if (field.type === 'onewayCheck') {
-	            reverser
-	                .classed('hide', reverserHidden())
-	                .call(reverserSetText);
-	        }
-	    };
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return;
+	    service.ensureViewerLoaded(context).then(function () {
+	      service.selectImage(context, d.key).showViewer(context);
+	    });
+	    context.map().centerEase(d.loc);
+	  }
 
+	  function mouseover(d) {
+	    var service = getService();
+	    if (service) service.setStyles(context, d);
+	  }
 
-	    check.focus = function() {
-	        input.node().focus();
-	    };
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
 
-	    return utilRebind(check, dispatch$1, 'on');
-	}
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	function uiFieldCombo(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var taginfo = services.taginfo;
-	    var isMulti = (field.type === 'multiCombo');
-	    var isNetwork = (field.type === 'networkCombo');
-	    var isSemi = (field.type === 'semiCombo');
-	    var optstrings = field.strings && field.strings.options;
-	    var optarray = field.options;
-	    var snake_case = (field.snake_case || (field.snake_case === undefined));
-	    var caseSensitive = field.caseSensitive;
-	    var combobox = uiCombobox(context, 'combo-' + field.safeid)
-	        .caseSensitive(caseSensitive)
-	        .minItems(isMulti || isSemi ? 1 : 2);
-	    var container = select(null);
-	    var inputWrap = select(null);
-	    var input = select(null);
-	    var _comboData = [];
-	    var _multiData = [];
-	    var _entityIDs = [];
-	    var _tags;
-	    var _countryCode;
-	    var _staticPlaceholder;
-
-	    // initialize deprecated tags array
-	    var _dataDeprecated = [];
-	    _mainFileFetcher.get('deprecated')
-	        .then(function(d) { _dataDeprecated = d; })
-	        .catch(function() { /* ignore */ });
-
-
-	    // ensure multiCombo field.key ends with a ':'
-	    if (isMulti && /[^:]$/.test(field.key)) {
-	        field.key += ':';
-	    }
-
-
-	    function snake(s) {
-	        return s.replace(/\s+/g, '_');
-	    }
-
-	    function unsnake(s) {
-	        return s.replace(/_+/g, ' ');
-	    }
-
-	    function clean(s) {
-	        return s.split(';')
-	            .map(function(s) { return s.trim(); })
-	            .join(';');
+	    if (d.pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
+	      t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
+	    } else if (d.ca) {
+	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
 	    }
 
+	    return t;
+	  }
+
+	  context.photos().on('change.mapillary_images', update);
 
-	    // returns the tag value for a display value
-	    // (for multiCombo, dval should be the key suffix, not the entire key)
-	    function tagValue(dval) {
-	        dval = clean(dval || '');
+	  function filterImages(images) {
+	    var showsPano = context.photos().showsPanoramic();
+	    var showsFlat = context.photos().showsFlat();
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	        if (optstrings) {
-	            var found = _comboData.find(function(o) {
-	                return o.key && clean(o.value) === dval;
-	            });
-	            if (found) {
-	                return found.key;
-	            }
-	        }
+	    if (!showsPano || !showsFlat) {
+	      images = images.filter(function (image) {
+	        if (image.pano) return showsPano;
+	        return showsFlat;
+	      });
+	    }
 
-	        if (field.type === 'typeCombo' && !dval) {
-	            return 'yes';
-	        }
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      images = images.filter(function (image) {
+	        return new Date(image.captured_at).getTime() >= fromTimestamp;
+	      });
+	    }
+
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      images = images.filter(function (image) {
+	        return new Date(image.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	        return (snake_case ? snake(dval) : dval) || undefined;
+	    if (usernames) {
+	      images = images.filter(function (image) {
+	        return usernames.indexOf(image.captured_by) !== -1;
+	      });
 	    }
 
+	    return images;
+	  }
 
-	    // returns the display value for a tag value
-	    // (for multiCombo, tval should be the key suffix, not the entire key)
-	    function displayValue(tval) {
-	        tval = tval || '';
+	  function filterSequences(sequences, service) {
+	    var showsPano = context.photos().showsPanoramic();
+	    var showsFlat = context.photos().showsFlat();
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	        if (optstrings) {
-	            var found = _comboData.find(function(o) {
-	                return o.key === tval && o.value;
-	            });
-	            if (found) {
-	                return found.value;
+	    if (!showsPano || !showsFlat) {
+	      sequences = sequences.filter(function (sequence) {
+	        if (sequence.properties.hasOwnProperty('pano')) {
+	          if (sequence.properties.pano) return showsPano;
+	          return showsFlat;
+	        } else {
+	          // if the sequence doesn't specify pano or not, search its images
+	          var cProps = sequence.properties.coordinateProperties;
+
+	          if (cProps && cProps.image_keys && cProps.image_keys.length > 0) {
+	            for (var index in cProps.image_keys) {
+	              var imageKey = cProps.image_keys[index];
+	              var image = service.cachedImage(imageKey);
+
+	              if (image && image.hasOwnProperty('pano')) {
+	                if (image.pano) return showsPano;
+	                return showsFlat;
+	              }
 	            }
+	          }
 	        }
 
-	        if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
-	            return '';
-	        }
+	        return false;
+	      });
+	    }
 
-	        return snake_case ? unsnake(tval) : tval;
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      sequences = sequences.filter(function (sequence) {
+	        return new Date(sequence.properties.captured_at).getTime() >= fromTimestamp;
+	      });
 	    }
 
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      sequences = sequences.filter(function (sequence) {
+	        return new Date(sequence.properties.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	    // Compute the difference between arrays of objects by `value` property
-	    //
-	    // objectDifference([{value:1}, {value:2}, {value:3}], [{value:2}])
-	    // > [{value:1}, {value:3}]
-	    //
-	    function objectDifference(a, b) {
-	        return a.filter(function(d1) {
-	            return !b.some(function(d2) {
-	                return !d2.isMixed && d1.value === d2.value;
-	            });
-	        });
+	    if (usernames) {
+	      sequences = sequences.filter(function (sequence) {
+	        return usernames.indexOf(sequence.properties.username) !== -1;
+	      });
 	    }
 
+	    return sequences;
+	  }
 
-	    function initCombo(selection, attachTo) {
-	        if (optstrings) {
-	            selection.attr('readonly', 'readonly');
-	            selection.call(combobox, attachTo);
-	            setStaticValues(setPlaceholder);
+	  function update() {
+	    var z = ~~context.map().zoom();
+	    var showMarkers = z >= minMarkerZoom;
+	    var showViewfields = z >= minViewfieldZoom;
+	    var service = getService();
+	    var sequences = service ? service.sequences(projection) : [];
+	    var images = service && showMarkers ? service.images(projection) : [];
+	    images = filterImages(images);
+	    sequences = filterSequences(sequences, service);
+	    service.filterViewer(context);
+	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+	      return d.properties.key;
+	    }); // exit
+
+	    traces.exit().remove(); // enter/update
+
+	    traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
+	      return d.key;
+	    }); // exit
+
+	    groups.exit().remove(); // enter
+
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
+
+	    var markers = groups.merge(groupsEnter).sort(function (a, b) {
+	      return b.loc[1] - a.loc[1]; // sort Y
+	    }).attr('transform', transform).select('.viewfield-scale');
+	    markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+	    var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+	    viewfields.exit().remove();
+	    viewfields.enter() // viewfields may or may not be drawn...
+	    .insert('path', 'circle') // but if they are, draw below the circles
+	    .attr('class', 'viewfield').classed('pano', function () {
+	      return this.parentNode.__data__.pano;
+	    }).attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
 
-	        } else if (optarray) {
-	            selection.call(combobox, attachTo);
-	            setStaticValues(setPlaceholder);
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	        } else if (taginfo) {
-	            selection.call(combobox.fetcher(setTaginfoValues), attachTo);
-	            setTaginfoValues('', setPlaceholder);
-	        }
+	      if (d.pano) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
 	    }
+	  }
 
+	  function drawImages(selection) {
+	    var enabled = svgMapillaryImages.enabled;
+	    var service = getService();
+	    layer = selection.selectAll('.layer-mapillary').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'sequences');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
+
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadImages(projection);
+	      } else {
+	        editOff();
+	      }
+	    }
+	  }
 
-	    function setStaticValues(callback) {
-	        if (!(optstrings || optarray)) { return; }
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgMapillaryImages.enabled;
+	    svgMapillaryImages.enabled = _;
 
-	        if (optstrings) {
-	            _comboData = Object.keys(optstrings).map(function(k) {
-	                var v = field.t('options.' + k, { 'default': optstrings[k] });
-	                return {
-	                    key: k,
-	                    value: v,
-	                    title: v
-	                };
-	            });
+	    if (svgMapillaryImages.enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	        } else if (optarray) {
-	            _comboData = optarray.map(function(k) {
-	                var v = snake_case ? unsnake(k) : k;
-	                return {
-	                    key: k,
-	                    value: v,
-	                    title: v
-	                };
-	            });
-	        }
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	        combobox.data(objectDifference(_comboData, _multiData));
-	        if (callback) { callback(_comboData); }
-	    }
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
+	  init();
+	  return drawImages;
+	}
 
-	    function setTaginfoValues(q, callback) {
-	        var fn = isMulti ? 'multikeys' : 'values';
-	        var query = (isMulti ? field.key : '') + q;
-	        var hasCountryPrefix = isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;
-	        if (hasCountryPrefix) {
-	            query = _countryCode + ':';
-	        }
+	function svgMapillaryPosition(projection, context) {
+	  var throttledRedraw = throttle(function () {
+	    update();
+	  }, 1000);
 
-	        var params = {
-	            debounce: (q !== ''),
-	            key: field.key,
-	            query: query
-	        };
+	  var minZoom = 12;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	        if (_entityIDs.length) {
-	            params.geometry = context.graph().geometry(_entityIDs[0]);
-	        }
+	  var _mapillary;
 
-	        taginfo[fn](params, function(err, data) {
-	            if (err) { return; }
+	  var viewerCompassAngle;
 
-	            data = data.filter(function(d) {
+	  function init() {
+	    if (svgMapillaryPosition.initialized) return; // run once
 
-	                if (field.type === 'typeCombo' && d.value === 'yes') {
-	                    // don't show the fallback value
-	                    return false;
-	                }
+	    svgMapillaryPosition.initialized = true;
+	  }
 
-	                // don't show values with very low usage
-	                return !d.count || d.count > 10;
-	            });
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	            var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
-	            if (deprecatedValues) {
-	                // don't suggest deprecated tag values
-	                data = data.filter(function(d) {
-	                    return deprecatedValues.indexOf(d.value) === -1;
-	                });
-	            }
+	      _mapillary.event.on('nodeChanged', throttledRedraw);
 
-	            if (hasCountryPrefix) {
-	                data = data.filter(function(d) {
-	                    return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
-	                });
-	            }
+	      _mapillary.event.on('bearingChanged', function (e) {
+	        viewerCompassAngle = e;
+	        if (context.map().isTransformed()) return;
+	        layer.selectAll('.viewfield-group.currentView').filter(function (d) {
+	          return d.pano;
+	        }).attr('transform', transform);
+	      });
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
+	    }
 
-	            // hide the caret if there are no suggestions
-	            container.classed('empty-combobox', data.length === 0);
-
-	            _comboData = data.map(function(d) {
-	                var k = d.value;
-	                if (isMulti) { k = k.replace(field.key, ''); }
-	                var v = snake_case ? unsnake(k) : k;
-	                return {
-	                    key: k,
-	                    value: v,
-	                    title: isMulti ? v : d.title
-	                };
-	            });
+	    return _mapillary;
+	  }
 
-	            _comboData = objectDifference(_comboData, _multiData);
-	            if (callback) { callback(_comboData); }
-	        });
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
+
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
+
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
+
+	    if (d.pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
+	      t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
+	    } else if (d.ca) {
+	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
 	    }
 
+	    return t;
+	  }
 
-	    function setPlaceholder(values) {
+	  function update() {
+	    var z = ~~context.map().zoom();
+	    var showViewfields = z >= minViewfieldZoom;
+	    var service = getService();
+	    var node = service && service.getActiveImage();
+	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(node ? [node] : [], function (d) {
+	      return d.key;
+	    }); // exit
 
-	        if (isMulti || isSemi) {
-	            _staticPlaceholder = field.placeholder() || _t('inspector.add');
-	        } else {
-	            var vals = values
-	                .map(function(d) { return d.value; })
-	                .filter(function(s) { return s.length < 20; });
+	    groups.exit().remove(); // enter
 
-	            var placeholders = vals.length > 1 ? vals : values.map(function(d) { return d.key; });
-	            _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
-	        }
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-	        if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
-	            _staticPlaceholder += '…';
-	        }
+	    var markers = groups.merge(groupsEnter).attr('transform', transform).select('.viewfield-scale');
+	    markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+	    var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+	    viewfields.exit().remove();
+	    viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').classed('pano', function () {
+	      return this.parentNode.__data__.pano;
+	    }).attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
 
-	        var ph;
-	        if (!isMulti && !isSemi && _tags && Array.isArray(_tags[field.key])) {
-	            ph = _t('inspector.multiple_values');
-	        } else {
-	            ph =  _staticPlaceholder;
-	        }
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	        container.selectAll('input')
-	            .attr('placeholder', ph);
+	      if (d.pano) {
+	        return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+	      } else {
+	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	      }
 	    }
+	  }
 
+	  function drawImages(selection) {
+	    var service = getService();
+	    layer = selection.selectAll('.layer-mapillary-position').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary-position');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
+
+	    if (service && ~~context.map().zoom() >= minZoom) {
+	      editOn();
+	      update();
+	    } else {
+	      editOff();
+	    }
+	  }
 
-	    function change() {
-	        var t = {};
-	        var val;
-
-	        if (isMulti || isSemi) {
-	            val = tagValue(utilGetSetValue(input).replace(/,/g, ';')) || '';
-	            container.classed('active', false);
-	            utilGetSetValue(input, '');
-
-	            var vals = val.split(';').filter(Boolean);
-	            if (!vals.length) { return; }
-
-	            if (isMulti) {
-	                utilArrayUniq(vals).forEach(function(v) {
-	                    var key = field.key + v;
-	                    if (_tags) {
-	                        // don't set a multicombo value to 'yes' if it already has a non-'no' value
-	                        // e.g. `language:de=main`
-	                        var old = _tags[key];
-	                        if (typeof old === 'string' && old.toLowerCase() !== 'no') { return; }
-	                    }
-	                    key = context.cleanTagKey(key);
-	                    field.keys.push(key);
-	                    t[key] = 'yes';
-	                });
+	  drawImages.enabled = function () {
+	    update();
+	    return this;
+	  };
 
-	            } else if (isSemi) {
-	                var arr = _multiData.map(function(d) { return d.key; });
-	                arr = arr.concat(vals);
-	                t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
-	            }
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
-	            window.setTimeout(function() { input.node().focus(); }, 10);
+	  init();
+	  return drawImages;
+	}
 
-	        } else {
-	            var rawValue = utilGetSetValue(input);
+	function svgMapillarySigns(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	            // don't override multiple values with blank string
-	            if (!rawValue && Array.isArray(_tags[field.key])) { return; }
+	  var minZoom = 12;
+	  var layer = select(null);
 
-	            val = context.cleanTagValue(tagValue(rawValue));
-	            t[field.key] = val || undefined;
-	        }
+	  var _mapillary;
 
-	        dispatch$1.call('change', this, t);
-	    }
+	  function init() {
+	    if (svgMapillarySigns.initialized) return; // run once
 
+	    svgMapillarySigns.enabled = false;
+	    svgMapillarySigns.initialized = true;
+	  }
 
-	    function removeMultikey(d) {
-	        event.stopPropagation();
-	        var t = {};
-	        if (isMulti) {
-	            t[d.key] = undefined;
-	        } else if (isSemi) {
-	            var arr = _multiData.map(function(md) {
-	                return md.key === d.key ? null : md.key;
-	            }).filter(Boolean);
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	            arr = utilArrayUniq(arr);
-	            t[field.key] = arr.length ? arr.join(';') : undefined;
-	        }
-	        dispatch$1.call('change', this, t);
+	      _mapillary.event.on('loadedSigns', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
 	    }
 
+	    return _mapillary;
+	  }
 
-	    function combo(selection) {
-	        container = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    service.loadSignResources(context);
+	    editOn();
+	  }
 
-	        var type = (isMulti || isSemi) ? 'multicombo': 'combo';
-	        container = container.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + type)
-	            .merge(container);
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    editOff();
+	  }
 
-	        if (isMulti || isSemi) {
-	            container = container.selectAll('.chiplist')
-	                .data([0]);
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	            var listClass = 'chiplist';
+	  function editOff() {
+	    layer.selectAll('.icon-sign').remove();
+	    layer.style('display', 'none');
+	  }
 
-	            // Use a separate line for each value in the Destinations field
-	            // to mimic highway exit signs
-	            if (field.key === 'destination') {
-	                listClass += ' full-line-chips';
-	            }
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return;
+	    context.map().centerEase(d.loc);
+	    var selectedImageKey = service.getSelectedImageKey();
+	    var imageKey;
+	    var highlightedDetection; // Pick one of the images the sign was detected in,
+	    // preference given to an image already selected.
+
+	    d.detections.forEach(function (detection) {
+	      if (!imageKey || selectedImageKey === detection.image_key) {
+	        imageKey = detection.image_key;
+	        highlightedDetection = detection;
+	      }
+	    });
 
-	            container = container.enter()
-	                .append('ul')
-	                .attr('class', listClass)
-	                .on('click', function() {
-	                    window.setTimeout(function() { input.node().focus(); }, 10);
-	                })
-	                .merge(container);
+	    if (imageKey === selectedImageKey) {
+	      service.highlightDetection(highlightedDetection).selectImage(context, imageKey);
+	    } else {
+	      service.ensureViewerLoaded(context).then(function () {
+	        service.highlightDetection(highlightedDetection).selectImage(context, imageKey).showViewer(context);
+	      });
+	    }
+	  }
 
+	  function update() {
+	    var service = getService();
+	    var data = service ? service.signs(projection) : [];
+	    var selectedImageKey = service.getSelectedImageKey();
+	    var transform = svgPointTransform(projection);
+	    var signs = layer.selectAll('.icon-sign').data(data, function (d) {
+	      return d.key;
+	    }); // exit
+
+	    signs.exit().remove(); // enter
+
+	    var enter = signs.enter().append('g').attr('class', 'icon-sign icon-detected').on('click', click);
+	    enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
+	      return '#' + d.value;
+	    });
+	    enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
 
-	            inputWrap = container.selectAll('.input-wrap')
-	                .data([0]);
+	    signs.merge(enter).attr('transform', transform).classed('currentView', function (d) {
+	      return d.detections.some(function (detection) {
+	        return detection.image_key === selectedImageKey;
+	      });
+	    }).sort(function (a, b) {
+	      var aSelected = a.detections.some(function (detection) {
+	        return detection.image_key === selectedImageKey;
+	      });
+	      var bSelected = b.detections.some(function (detection) {
+	        return detection.image_key === selectedImageKey;
+	      });
 
-	            inputWrap = inputWrap.enter()
-	                .append('li')
-	                .attr('class', 'input-wrap')
-	                .merge(inputWrap);
+	      if (aSelected === bSelected) {
+	        return b.loc[1] - a.loc[1]; // sort Y
+	      } else if (aSelected) {
+	        return 1;
+	      }
 
-	            input = inputWrap.selectAll('input')
-	                .data([0]);
-	        } else {
-	            input = container.selectAll('input')
-	                .data([0]);
-	        }
-
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('id', field.domId)
-	            .call(utilNoAuto)
-	            .call(initCombo, selection)
-	            .merge(input);
-
-	        if (isNetwork) {
-	            var extent = combinedEntityExtent();
-	            var countryCode = extent && iso1A2Code(extent.center());
-	            _countryCode = countryCode && countryCode.toLowerCase();
-	        }
-
-	        input
-	            .on('change', change)
-	            .on('blur', change);
-
-	        input
-	            .on('keydown.field', function() {
-	                switch (event.keyCode) {
-	                    case 13: // ↩ Return
-	                        input.node().blur(); // blurring also enters the value
-	                        event.stopPropagation();
-	                        break;
-	                }
-	            });
+	      return -1;
+	    });
+	  }
 
-	        if (isMulti || isSemi) {
-	            combobox
-	                .on('accept', function() {
-	                    input.node().blur();
-	                    input.node().focus();
-	                });
+	  function drawSigns(selection) {
+	    var enabled = svgMapillarySigns.enabled;
+	    var service = getService();
+	    layer = selection.selectAll('.layer-mapillary-signs').data(service ? [0] : []);
+	    layer.exit().remove();
+	    layer = layer.enter().append('g').attr('class', 'layer-mapillary-signs layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);
 
-	            input
-	                .on('focus', function() { container.classed('active', true); });
-	        }
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadSigns(projection);
+	        service.showSignDetections(true);
+	      } else {
+	        editOff();
+	      }
+	    } else if (service) {
+	      service.showSignDetections(false);
 	    }
+	  }
 
+	  drawSigns.enabled = function (_) {
+	    if (!arguments.length) return svgMapillarySigns.enabled;
+	    svgMapillarySigns.enabled = _;
 
-	    combo.tags = function(tags) {
-	        _tags = tags;
-
-	        if (isMulti || isSemi) {
-	            _multiData = [];
+	    if (svgMapillarySigns.enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	            var maxLength;
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	            if (isMulti) {
-	                // Build _multiData array containing keys already set..
-	                for (var k in tags) {
-	                    if (k.indexOf(field.key) !== 0) { continue; }
-	                    var v = tags[k];
-	                    if (!v || (typeof v === 'string' && v.toLowerCase() === 'no')) { continue; }
+	  drawSigns.supported = function () {
+	    return !!getService();
+	  };
 
-	                    var suffix = k.substring(field.key.length);
-	                    _multiData.push({
-	                        key: k,
-	                        value: displayValue(suffix),
-	                        isMixed: Array.isArray(v)
-	                    });
-	                }
+	  init();
+	  return drawSigns;
+	}
 
-	                // Set keys for form-field modified (needed for undo and reset buttons)..
-	                field.keys = _multiData.map(function(d) { return d.key; });
+	function svgMapillaryMapFeatures(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	                // limit the input length so it fits after prepending the key prefix
-	                maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+	  var minZoom = 12;
+	  var layer = select(null);
 
-	            } else if (isSemi) {
+	  var _mapillary;
 
-	                var allValues = [];
-	                var commonValues;
-	                if (Array.isArray(tags[field.key])) {
+	  function init() {
+	    if (svgMapillaryMapFeatures.initialized) return; // run once
 
-	                    tags[field.key].forEach(function(tagVal) {
-	                        var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
-	                        allValues = allValues.concat(thisVals);
-	                        if (!commonValues) {
-	                            commonValues = thisVals;
-	                        } else {
-	                            commonValues = commonValues.filter(function (value) { return thisVals.includes(value); });
-	                        }
-	                    });
-	                    allValues = utilArrayUniq(allValues).filter(Boolean);
+	    svgMapillaryMapFeatures.enabled = false;
+	    svgMapillaryMapFeatures.initialized = true;
+	  }
 
-	                } else {
-	                    allValues =  utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
-	                    commonValues = allValues;
-	                }
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	                _multiData = allValues.map(function(v) {
-	                    return {
-	                        key: v,
-	                        value: displayValue(v),
-	                        isMixed: !commonValues.includes(v)
-	                    };
-	                });
+	      _mapillary.event.on('loadedMapFeatures', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
+	    }
 
-	                var currLength = utilUnicodeCharsCount(commonValues.join(';'));
+	    return _mapillary;
+	  }
 
-	                // limit the input length to the remaining available characters
-	                maxLength = context.maxCharsForTagValue() - currLength;
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    service.loadObjectResources(context);
+	    editOn();
+	  }
 
-	                if (currLength > 0) {
-	                    // account for the separator if a new value will be appended to existing
-	                    maxLength -= 1;
-	                }
-	            }
-	            // a negative maxlength doesn't make sense
-	            maxLength = Math.max(0, maxLength);
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    editOff();
+	  }
 
-	            var allowDragAndDrop = isSemi // only semiCombo values are ordered
-	                && !Array.isArray(tags[field.key]);
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	            // Exclude existing multikeys from combo options..
-	            var available = objectDifference(_comboData, _multiData);
-	            combobox.data(available);
+	  function editOff() {
+	    layer.selectAll('.icon-map-feature').remove();
+	    layer.style('display', 'none');
+	  }
 
-	            // Hide 'Add' button if this field uses fixed set of
-	            // translateable optstrings and they're all currently used,
-	            // or if the field is already at its character limit
-	            var hideAdd = (optstrings && !available.length) || maxLength <= 0;
-	            container.selectAll('.chiplist .input-wrap')
-	                .style('display', hideAdd ? 'none' : null);
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return;
+	    context.map().centerEase(d.loc);
+	    var selectedImageKey = service.getSelectedImageKey();
+	    var imageKey;
+	    var highlightedDetection; // Pick one of the images the map feature was detected in,
+	    // preference given to an image already selected.
+
+	    d.detections.forEach(function (detection) {
+	      if (!imageKey || selectedImageKey === detection.image_key) {
+	        imageKey = detection.image_key;
+	        highlightedDetection = detection;
+	      }
+	    });
 
+	    if (imageKey === selectedImageKey) {
+	      service.highlightDetection(highlightedDetection).selectImage(context, imageKey);
+	    } else {
+	      service.ensureViewerLoaded(context).then(function () {
+	        service.highlightDetection(highlightedDetection).selectImage(context, imageKey).showViewer(context);
+	      });
+	    }
+	  }
 
-	            // Render chips
-	            var chips = container.selectAll('.chip')
-	                .data(_multiData);
+	  function update() {
+	    var service = getService();
+	    var data = service ? service.mapFeatures(projection) : [];
+	    var selectedImageKey = service && service.getSelectedImageKey();
+	    var transform = svgPointTransform(projection);
+	    var mapFeatures = layer.selectAll('.icon-map-feature').data(data, function (d) {
+	      return d.key;
+	    }); // exit
+
+	    mapFeatures.exit().remove(); // enter
+
+	    var enter = mapFeatures.enter().append('g').attr('class', 'icon-map-feature icon-detected').on('click', click);
+	    enter.append('title').text(function (d) {
+	      var id = d.value.replace(/--/g, '.').replace(/-/g, '_');
+	      return _t('mapillary_map_features.' + id);
+	    });
+	    enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
+	      if (d.value === 'object--billboard') {
+	        // no billboard icon right now, so use the advertisement icon
+	        return '#object--sign--advertisement';
+	      }
 
-	            chips.exit()
-	                .remove();
+	      return '#' + d.value;
+	    });
+	    enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
 
-	            var enter = chips.enter()
-	                .insert('li', '.input-wrap')
-	                .attr('class', 'chip');
+	    mapFeatures.merge(enter).attr('transform', transform).classed('currentView', function (d) {
+	      return d.detections.some(function (detection) {
+	        return detection.image_key === selectedImageKey;
+	      });
+	    }).sort(function (a, b) {
+	      var aSelected = a.detections.some(function (detection) {
+	        return detection.image_key === selectedImageKey;
+	      });
+	      var bSelected = b.detections.some(function (detection) {
+	        return detection.image_key === selectedImageKey;
+	      });
 
-	            enter.append('span');
-	            enter.append('a');
+	      if (aSelected === bSelected) {
+	        return b.loc[1] - a.loc[1]; // sort Y
+	      } else if (aSelected) {
+	        return 1;
+	      }
 
-	            chips = chips.merge(enter)
-	                .order()
-	                .classed('draggable', allowDragAndDrop)
-	                .classed('mixed', function(d) {
-	                    return d.isMixed;
-	                })
-	                .attr('title', function(d) {
-	                    return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
-	                });
+	      return -1;
+	    });
+	  }
 
-	            if (allowDragAndDrop) {
-	                registerDragAndDrop(chips);
-	            }
+	  function drawMapFeatures(selection) {
+	    var enabled = svgMapillaryMapFeatures.enabled;
+	    var service = getService();
+	    layer = selection.selectAll('.layer-mapillary-map-features').data(service ? [0] : []);
+	    layer.exit().remove();
+	    layer = layer.enter().append('g').attr('class', 'layer-mapillary-map-features layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);
 
-	            chips.select('span')
-	                .text(function(d) { return d.value; });
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadMapFeatures(projection);
+	        service.showFeatureDetections(true);
+	      } else {
+	        editOff();
+	      }
+	    } else if (service) {
+	      service.showFeatureDetections(false);
+	    }
+	  }
 
-	            chips.select('a')
-	                .on('click', removeMultikey)
-	                .attr('class', 'remove')
-	                .text('×');
+	  drawMapFeatures.enabled = function (_) {
+	    if (!arguments.length) return svgMapillaryMapFeatures.enabled;
+	    svgMapillaryMapFeatures.enabled = _;
 
-	        } else {
-	            var isMixed = Array.isArray(tags[field.key]);
+	    if (svgMapillaryMapFeatures.enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	            var mixedValues = isMixed && tags[field.key].map(function(val) {
-	                return displayValue(val);
-	            }).filter(Boolean);
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	            utilGetSetValue(input, !isMixed ? displayValue(tags[field.key]) : '')
-	                .attr('title', isMixed ? mixedValues.join('\n') : undefined)
-	                .attr('placeholder', isMixed ? _t('inspector.multiple_values') : _staticPlaceholder || '')
-	                .classed('mixed', isMixed);
-	        }
-	    };
+	  drawMapFeatures.supported = function () {
+	    return !!getService();
+	  };
 
-	    function registerDragAndDrop(selection) {
+	  init();
+	  return drawMapFeatures;
+	}
 
-	        // allow drag and drop re-ordering of chips
-	        var dragOrigin, targetIndex;
-	        selection.call(d3_drag()
-	            .on('start', function() {
-	                dragOrigin = {
-	                    x: event.x,
-	                    y: event.y
-	                };
-	                targetIndex = null;
-	            })
-	            .on('drag', function(d, index) {
-	                var x = event.x - dragOrigin.x,
-	                    y = event.y - dragOrigin.y;
-
-	                if (!select(this).classed('dragging') &&
-	                    // don't display drag until dragging beyond a distance threshold
-	                    Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) { return; }
-
-	                select(this)
-	                    .classed('dragging', true);
-
-	                targetIndex = null;
-	                var targetIndexOffsetTop = null;
-	                var draggedTagWidth = select(this).node().offsetWidth;
-
-	                if (field.key === 'destination') { // meaning tags are full width
-	                    container.selectAll('.chip')
-	                        .style('transform', function(d2, index2) {
-	                            var node = select(this).node();
-
-	                            if (index === index2) {
-	                                return 'translate(' + x + 'px, ' + y + 'px)';
-	                            // move the dragged tag up the order
-	                            } else if (index2 > index && event.y > node.offsetTop) {
-	                                if (targetIndex === null || index2 > targetIndex) {
-	                                    targetIndex = index2;
-	                                }
-	                                return 'translateY(-100%)';
-	                            // move the dragged tag down the order
-	                            } else if (index2 < index && event.y < node.offsetTop + node.offsetHeight) {
-	                                if (targetIndex === null || index2 < targetIndex) {
-	                                    targetIndex = index2;
-	                                }
-	                                return 'translateY(100%)';
-	                            }
-	                            return null;
-	                        });
-	                } else {
-	                    container.selectAll('.chip')
-	                        .each(function(d2, index2) {
-	                            var node = select(this).node();
-
-	                            // check the cursor is in the bounding box
-	                            if (
-	                                index !== index2 &&
-	                                event.x < node.offsetLeft + node.offsetWidth + 5 &&
-	                                event.x > node.offsetLeft &&
-	                                event.y < node.offsetTop + node.offsetHeight &&
-	                                event.y > node.offsetTop
-	                            ) {
-	                                targetIndex = index2;
-	                                targetIndexOffsetTop = node.offsetTop;
-	                            }
-	                        })
-	                        .style('transform', function(d2, index2) {
-	                            var node = select(this).node();
-
-	                            if (index === index2) {
-	                                return 'translate(' + x + 'px, ' + y + 'px)';
-	                            }
-
-	                            // only translate tags in the same row
-	                            if (node.offsetTop === targetIndexOffsetTop) {
-	                                if (index2 < index && index2 >= targetIndex) {
-	                                    return 'translateX(' + draggedTagWidth + 'px)';
-	                                } else if (index2 > index && index2 <= targetIndex) {
-	                                    return 'translateX(-' + draggedTagWidth + 'px)';
-	                                }
-	                            }
-	                            return null;
-	                        });
-	                    }
-	            })
-	            .on('end', function(d, index) {
-	                if (!select(this).classed('dragging')) {
-	                    return;
-	                }
+	function svgOpenstreetcamImages(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	                select(this)
-	                    .classed('dragging', false);
+	  var minZoom = 12;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	                container.selectAll('.chip')
-	                    .style('transform', null);
+	  var _openstreetcam;
 
-	                if (typeof targetIndex === 'number') {
-	                    var element = _multiData[index];
-	                    _multiData.splice(index, 1);
-	                    _multiData.splice(targetIndex, 0, element);
+	  function init() {
+	    if (svgOpenstreetcamImages.initialized) return; // run once
 
-	                    var t = {};
+	    svgOpenstreetcamImages.enabled = false;
+	    svgOpenstreetcamImages.initialized = true;
+	  }
 
-	                    if (_multiData.length) {
-	                        t[field.key] = _multiData.map(function(element) {
-	                            return element.key;
-	                        }).join(';');
-	                    } else {
-	                        t[field.key] = undefined;
-	                    }
+	  function getService() {
+	    if (services.openstreetcam && !_openstreetcam) {
+	      _openstreetcam = services.openstreetcam;
 
-	                    dispatch$1.call('change', this, t);
-	                }
-	                dragOrigin = undefined;
-	                targetIndex = undefined;
-	            })
-	        );
+	      _openstreetcam.event.on('loadedImages', throttledRedraw);
+	    } else if (!services.openstreetcam && _openstreetcam) {
+	      _openstreetcam = null;
 	    }
 
+	    return _openstreetcam;
+	  }
 
-	    combo.focus = function() {
-	        input.node().focus();
-	    };
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    editOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
 
-	    combo.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return combo;
-	    };
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	    }
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return;
+	    service.ensureViewerLoaded(context).then(function () {
+	      service.selectImage(context, d.key).showViewer(context);
+	    });
+	    context.map().centerEase(d.loc);
+	  }
 
+	  function mouseover(d3_event, d) {
+	    var service = getService();
+	    if (service) service.setStyles(context, d);
+	  }
 
-	    return utilRebind(combo, dispatch$1, 'on');
-	}
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
 
-	function uiFieldText(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var input = select(null);
-	    var outlinkButton = select(null);
-	    var _entityIDs = [];
-	    var _tags;
-	    var _phoneFormats = {};
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	    if (field.type === 'tel') {
-	        _mainFileFetcher.get('phone_formats')
-	            .then(function(d) {
-	                _phoneFormats = d;
-	                updatePhonePlaceholder();
-	            })
-	            .catch(function() { /* ignore */ });
+	    if (d.ca) {
+	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
 	    }
 
-	    function i(selection) {
-	        var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
-	        var preset = entity && _mainPresetIndex.match(entity, context.graph());
-	        var isLocked = preset && preset.suggestion && field.id === 'brand';
-	        field.locked(isLocked);
-
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
-
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	    return t;
+	  }
 
-	        input = wrap.selectAll('input')
-	            .data([0]);
+	  context.photos().on('change.openstreetcam_images', update);
 
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', field.type === 'identifier' ? 'text' : field.type)
-	            .attr('id', field.domId)
-	            .classed(field.type, true)
-	            .call(utilNoAuto)
-	            .merge(input);
+	  function filterImages(images) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	        input
-	            .classed('disabled', !!isLocked)
-	            .attr('readonly', isLocked || null)
-	            .on('input', change(true))
-	            .on('blur', change())
-	            .on('change', change());
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      images = images.filter(function (item) {
+	        return new Date(item.captured_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      images = images.filter(function (item) {
+	        return new Date(item.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	        if (field.type === 'tel') {
-	            updatePhonePlaceholder();
+	    if (usernames) {
+	      images = images.filter(function (item) {
+	        return usernames.indexOf(item.captured_by) !== -1;
+	      });
+	    }
 
-	        } else if (field.type === 'number') {
-	            var rtl = (_mainLocalizer.textDirection() === 'rtl');
+	    return images;
+	  }
 
-	            input.attr('type', 'text');
+	  function filterSequences(sequences) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	            var buttons = wrap.selectAll('.increment, .decrement')
-	                .data(rtl ? [1, -1] : [-1, 1]);
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      sequences = sequences.filter(function (image) {
+	        return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
-	            buttons.enter()
-	                .append('button')
-	                .attr('tabindex', -1)
-	                .attr('class', function(d) {
-	                    var which = (d === 1 ? 'increment' : 'decrement');
-	                    return 'form-field-button ' + which;
-	                })
-	                .merge(buttons)
-	                .on('click', function(d) {
-	                    event.preventDefault();
-	                    var raw_vals = input.node().value || '0';
-	                    var vals = raw_vals.split(';');
-	                    vals = vals.map(function(v) {
-	                        var num = parseFloat(v.trim(), 10);
-	                        return isFinite(num) ? clamped(num + d) : v.trim();
-	                    });
-	                    input.node().value = vals.join(';');
-	                    change()();
-	                });
-	        } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      sequences = sequences.filter(function (image) {
+	        return new Date(image.properties.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	            input.attr('type', 'text');
+	    if (usernames) {
+	      sequences = sequences.filter(function (image) {
+	        return usernames.indexOf(image.properties.captured_by) !== -1;
+	      });
+	    }
 
-	            outlinkButton = wrap.selectAll('.foreign-id-permalink')
-	                .data([0]);
+	    return sequences;
+	  }
 
-	            outlinkButton.enter()
-	                .append('button')
-	                .attr('tabindex', -1)
-	                .call(svgIcon('#iD-icon-out-link'))
-	                .attr('class', 'form-field-button foreign-id-permalink')
-	                .attr('title', function() {
-	                    var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);
-	                    if (domainResults.length >= 2 && domainResults[1]) {
-	                        var domain = domainResults[1];
-	                        return _t('icons.view_on', { domain: domain });
-	                    }
-	                    return '';
-	                })
-	                .on('click', function() {
-	                    event.preventDefault();
+	  function update() {
+	    var viewer = context.container().select('.photoviewer');
+	    var selected = viewer.empty() ? undefined : viewer.datum();
+	    var z = ~~context.map().zoom();
+	    var showMarkers = z >= minMarkerZoom;
+	    var showViewfields = z >= minViewfieldZoom;
+	    var service = getService();
+	    var sequences = [];
+	    var images = [];
 
-	                    var value = validIdentifierValueForLink();
-	                    if (value) {
-	                        var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
-	                        window.open(url, '_blank');
-	                    }
-	                })
-	                .merge(outlinkButton);
-	        }
+	    if (context.photos().showsFlat()) {
+	      sequences = service ? service.sequences(projection) : [];
+	      images = service && showMarkers ? service.images(projection) : [];
+	      sequences = filterSequences(sequences);
+	      images = filterImages(images);
 	    }
 
+	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+	      return d.properties.key;
+	    }); // exit
 
-	    function updatePhonePlaceholder() {
-	        if (input.empty() || !Object.keys(_phoneFormats).length) { return; }
+	    traces.exit().remove(); // enter/update
 
-	        var extent = combinedEntityExtent();
-	        var countryCode = extent && iso1A2Code(extent.center());
-	        var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
-	        if (format) { input.attr('placeholder', format); }
-	    }
+	    traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+	    var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
+	      return d.key;
+	    }); // exit
 
+	    groups.exit().remove(); // enter
 
-	    function validIdentifierValueForLink() {
-	        if (field.type === 'identifier' && field.pattern) {
-	            var value = utilGetSetValue(input).trim().split(';')[0];
-	            return value && value.match(new RegExp(field.pattern));
-	        }
-	        return null;
-	    }
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
+	    var markers = groups.merge(groupsEnter).sort(function (a, b) {
+	      return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1]; // sort Y
+	    }).attr('transform', transform).select('.viewfield-scale');
+	    markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+	    var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+	    viewfields.exit().remove();
+	    viewfields.enter() // viewfields may or may not be drawn...
+	    .insert('path', 'circle') // but if they are, draw below the circles
+	    .attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
+	  }
 
-	    // clamp number to min/max
-	    function clamped(num) {
-	        if (field.minValue !== undefined) {
-	            num = Math.max(num, field.minValue);
-	        }
-	        if (field.maxValue !== undefined) {
-	            num = Math.min(num, field.maxValue);
-	        }
-	        return num;
+	  function drawImages(selection) {
+	    var enabled = svgOpenstreetcamImages.enabled,
+	        service = getService();
+	    layer = selection.selectAll('.layer-openstreetcam').data(service ? [0] : []);
+	    layer.exit().remove();
+	    var layerEnter = layer.enter().append('g').attr('class', 'layer-openstreetcam').style('display', enabled ? 'block' : 'none');
+	    layerEnter.append('g').attr('class', 'sequences');
+	    layerEnter.append('g').attr('class', 'markers');
+	    layer = layerEnter.merge(layer);
+
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadImages(projection);
+	      } else {
+	        editOff();
+	      }
 	    }
+	  }
 
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgOpenstreetcamImages.enabled;
+	    svgOpenstreetcamImages.enabled = _;
 
-	    function change(onInput) {
-	        return function() {
-	            var t = {};
-	            var val = utilGetSetValue(input);
-	            if (!onInput) { val = context.cleanTagValue(val); }
-
-	            // don't override multiple values with blank string
-	            if (!val && Array.isArray(_tags[field.key])) { return; }
-
-	            if (!onInput) {
-	                if (field.type === 'number' && val) {
-	                    var vals = val.split(';');
-	                    vals = vals.map(function(v) {
-	                        var num = parseFloat(v.trim(), 10);
-	                        return isFinite(num) ? clamped(num) : v.trim();
-	                    });
-	                    val = vals.join(';');
-	                }
-	                utilGetSetValue(input, val);
-	            }
-	            t[field.key] = val || undefined;
-	            dispatch$1.call('change', this, t, onInput);
-	        };
+	    if (svgOpenstreetcamImages.enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
 	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    i.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return i;
-	    };
-
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
-	    i.tags = function(tags) {
-	        _tags = tags;
+	  init();
+	  return drawImages;
+	}
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	function svgOsm(projection, context, dispatch) {
+	  var enabled = true;
 
-	        utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '')
-	            .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : (field.placeholder() || _t('inspector.unknown')))
-	            .classed('mixed', isMixed);
+	  function drawOsm(selection) {
+	    selection.selectAll('.layer-osm').data(['covered', 'areas', 'lines', 'points', 'labels']).enter().append('g').attr('class', function (d) {
+	      return 'layer-osm ' + d;
+	    });
+	    selection.selectAll('.layer-osm.points').selectAll('.points-group').data(['points', 'midpoints', 'vertices', 'turns']).enter().append('g').attr('class', function (d) {
+	      return 'points-group ' + d;
+	    });
+	  }
 
-	        if (outlinkButton && !outlinkButton.empty()) {
-	            var disabled = !validIdentifierValueForLink();
-	            outlinkButton.classed('disabled', disabled);
-	        }
-	    };
+	  function showLayer() {
+	    var layer = context.surface().selectAll('.data-layer.osm');
+	    layer.interrupt();
+	    layer.classed('disabled', false).style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
+	  function hideLayer() {
+	    var layer = context.surface().selectAll('.data-layer.osm');
+	    layer.interrupt();
+	    layer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      layer.classed('disabled', true);
+	      dispatch.call('change');
+	    });
+	  }
 
-	    i.focus = function() {
-	        var node = input.node();
-	        if (node) { node.focus(); }
-	    };
+	  drawOsm.enabled = function (val) {
+	    if (!arguments.length) return enabled;
+	    enabled = val;
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	    if (enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
 	    }
 
-	    return utilRebind(i, dispatch$1, 'on');
-	}
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	function uiFieldAccess(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var items = select(null);
-	    var _tags;
+	  return drawOsm;
+	}
 
-	    function access(selection) {
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	var _notesEnabled = false;
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	var _osmService;
 
-	        var list = wrap.selectAll('ul')
-	            .data([0]);
+	function svgNotes(projection, context, dispatch$1) {
+	  if (!dispatch$1) {
+	    dispatch$1 = dispatch('change');
+	  }
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(list);
+	  var throttledRedraw = throttle(function () {
+	    dispatch$1.call('change');
+	  }, 1000);
 
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var _notesVisible = false;
 
-	        items = list.selectAll('li')
-	            .data(field.keys);
+	  function markerPath(selection, klass) {
+	    selection.attr('class', klass).attr('transform', 'translate(-8, -22)').attr('d', 'm17.5,0l-15,0c-1.37,0 -2.5,1.12 -2.5,2.5l0,11.25c0,1.37 1.12,2.5 2.5,2.5l3.75,0l0,3.28c0,0.38 0.43,0.6 0.75,0.37l4.87,-3.65l5.62,0c1.37,0 2.5,-1.12 2.5,-2.5l0,-11.25c0,-1.37 -1.12,-2.5 -2.5,-2.5z');
+	  } // Loosely-coupled osm service for fetching notes.
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'labeled-input preset-access-' + d; });
 
-	        enter
-	            .append('span')
-	            .attr('class', 'label preset-label-access')
-	            .attr('for', function(d) { return 'preset-input-access-' + d; })
-	            .text(function(d) { return field.t('types.' + d); });
+	  function getService() {
+	    if (services.osm && !_osmService) {
+	      _osmService = services.osm;
 
-	        enter
-	            .append('div')
-	            .attr('class', 'preset-input-access-wrap')
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', function(d) { return 'preset-input-access preset-input-access-' + d; })
-	            .call(utilNoAuto)
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiCombobox(context, 'access-' + d)
-	                        .data(access.options(d))
-	                    );
-	            });
+	      _osmService.on('loadedNotes', throttledRedraw);
+	    } else if (!services.osm && _osmService) {
+	      _osmService = null;
+	    }
 
+	    return _osmService;
+	  } // Show the notes
 
-	        // Update
-	        items = items.merge(enter);
 
-	        wrap.selectAll('.preset-input-access')
-	            .on('change', change)
-	            .on('blur', change);
+	  function editOn() {
+	    if (!_notesVisible) {
+	      _notesVisible = true;
+	      drawLayer.style('display', 'block');
 	    }
+	  } // Immediately remove the notes and their touch targets
 
 
-	    function change(d) {
-	        var tag = {};
-	        var value = context.cleanTagValue(utilGetSetValue(select(this)));
+	  function editOff() {
+	    if (_notesVisible) {
+	      _notesVisible = false;
+	      drawLayer.style('display', 'none');
+	      drawLayer.selectAll('.note').remove();
+	      touchLayer.selectAll('.note').remove();
+	    }
+	  } // Enable the layer.  This shows the notes and transitions them to visible.
 
-	        // don't override multiple values with blank string
-	        if (!value && typeof _tags[d] !== 'string') { return; }
 
-	        tag[d] = value || undefined;
-	        dispatch$1.call('change', this, tag);
-	    }
+	  function layerOn() {
+	    editOn();
+	    drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+	      dispatch$1.call('change');
+	    });
+	  } // Disable the layer.  This transitions the layer invisible and then hides the notes.
 
 
-	    access.options = function(type) {
-	        var options = ['no', 'permissive', 'private', 'permit', 'destination'];
+	  function layerOff() {
+	    throttledRedraw.cancel();
+	    drawLayer.interrupt();
+	    touchLayer.selectAll('.note').remove();
+	    drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+	      editOff();
+	      dispatch$1.call('change');
+	    });
+	  } // Update the note markers
 
-	        if (type !== 'access') {
-	            options.unshift('yes');
-	            options.push('designated');
 
-	            if (type === 'bicycle') {
-	                options.push('dismount');
-	            }
-	        }
+	  function updateMarkers() {
+	    if (!_notesVisible || !_notesEnabled) return;
+	    var service = getService();
+	    var selectedID = context.selectedNoteID();
+	    var data = service ? service.notes(projection) : [];
+	    var getTransform = svgPointTransform(projection); // Draw markers..
 
-	        return options.map(function(option) {
-	            return {
-	                title: field.t('options.' + option + '.description'),
-	                value: option
-	            };
-	        });
-	    };
+	    var notes = drawLayer.selectAll('.note').data(data, function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
+	    notes.exit().remove(); // enter
 
-	    var placeholdersByHighway = {
-	        footway: {
-	            foot: 'designated',
-	            motor_vehicle: 'no'
-	        },
-	        steps: {
-	            foot: 'yes',
-	            motor_vehicle: 'no',
-	            bicycle: 'no',
-	            horse: 'no'
-	        },
-	        pedestrian: {
-	            foot: 'yes',
-	            motor_vehicle: 'no'
-	        },
-	        cycleway: {
-	            motor_vehicle: 'no',
-	            bicycle: 'designated'
-	        },
-	        bridleway: {
-	            motor_vehicle: 'no',
-	            horse: 'designated'
-	        },
-	        path: {
-	            foot: 'yes',
-	            motor_vehicle: 'no',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        motorway: {
-	            foot: 'no',
-	            motor_vehicle: 'yes',
-	            bicycle: 'no',
-	            horse: 'no'
-	        },
-	        trunk: {
-	            motor_vehicle: 'yes'
-	        },
-	        primary: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        secondary: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        tertiary: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        residential: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        unclassified: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        service: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        motorway_link: {
-	            foot: 'no',
-	            motor_vehicle: 'yes',
-	            bicycle: 'no',
-	            horse: 'no'
-	        },
-	        trunk_link: {
-	            motor_vehicle: 'yes'
-	        },
-	        primary_link: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        secondary_link: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        },
-	        tertiary_link: {
-	            foot: 'yes',
-	            motor_vehicle: 'yes',
-	            bicycle: 'yes',
-	            horse: 'yes'
-	        }
-	    };
+	    var notesEnter = notes.enter().append('g').attr('class', function (d) {
+	      return 'note note-' + d.id + ' ' + d.status;
+	    }).classed('new', function (d) {
+	      return d.id < 0;
+	    });
+	    notesEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+	    notesEnter.append('path').call(markerPath, 'shadow');
+	    notesEnter.append('use').attr('class', 'note-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-note');
+	    notesEnter.selectAll('.icon-annotation').data(function (d) {
+	      return [d];
+	    }).enter().append('use').attr('class', 'icon-annotation').attr('width', '10px').attr('height', '10px').attr('x', '-3px').attr('y', '-19px').attr('xlink:href', function (d) {
+	      return '#iD-icon-' + (d.id < 0 ? 'plus' : d.status === 'open' ? 'close' : 'apply');
+	    }); // update
+
+	    notes.merge(notesEnter).sort(sortY).classed('selected', function (d) {
+	      var mode = context.mode();
+	      var isMoving = mode && mode.id === 'drag-note'; // no shadows when dragging
+
+	      return !isMoving && d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
+
+	    if (touchLayer.empty()) return;
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var targets = touchLayer.selectAll('.note').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
+	    targets.exit().remove(); // enter/update
 
-	    access.tags = function(tags) {
-	        _tags = tags;
-
-	        utilGetSetValue(items.selectAll('.preset-input-access'), function(d) {
-	                return typeof tags[d] === 'string' ? tags[d] : '';
-	            })
-	            .classed('mixed', function(d) {
-	                return tags[d] && Array.isArray(tags[d]);
-	            })
-	            .attr('title', function(d) {
-	                return tags[d] && Array.isArray(tags[d]) && tags[d].filter(Boolean).join('\n');
-	            })
-	            .attr('placeholder', function(d) {
-	                if (tags[d] && Array.isArray(tags[d])) {
-	                    return _t('inspector.multiple_values');
-	                }
-	                if (d === 'access') {
-	                    return 'yes';
-	                }
-	                if (tags.access && typeof tags.access === 'string') {
-	                    return tags.access;
-	                }
-	                if (tags.highway) {
-	                    if (typeof tags.highway === 'string') {
-	                        if (placeholdersByHighway[tags.highway] &&
-	                            placeholdersByHighway[tags.highway][d]) {
+	    targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
+	      var newClass = d.id < 0 ? 'new' : '';
+	      return 'note target note-' + d.id + ' ' + fillClass + newClass;
+	    }).attr('transform', getTransform);
 
-	                            return placeholdersByHighway[tags.highway][d];
-	                        }
-	                    } else {
-	                        var impliedAccesses = tags.highway.filter(Boolean).map(function(highwayVal) {
-	                            return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
-	                        }).filter(Boolean);
-
-	                        if (impliedAccesses.length === tags.highway.length &&
-	                            new Set(impliedAccesses).size === 1) {
-	                            // if all the highway values have the same implied access for this type then use that
-	                            return impliedAccesses[0];
-	                        }
-	                    }
-	                }
-	                return field.placeholder();
-	            });
-	    };
+	    function sortY(a, b) {
+	      return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
+	    }
+	  } // Draw the notes layer and schedule loading notes and updating markers.
 
 
-	    access.focus = function() {
-	        items.selectAll('.preset-input-access')
-	            .node().focus();
-	    };
+	  function drawNotes(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
-	    return utilRebind(access, dispatch$1, 'on');
-	}
+	    drawLayer = selection.selectAll('.layer-notes').data(service ? [0] : []);
+	    drawLayer.exit().remove();
+	    drawLayer = drawLayer.enter().append('g').attr('class', 'layer-notes').style('display', _notesEnabled ? 'block' : 'none').merge(drawLayer);
 
-	function uiFieldAddress(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var _selection = select(null);
-	    var _wrap = select(null);
-	    var addrField = _mainPresetIndex.field('address');   // needed for placeholder strings
-
-	    var _entityIDs = [];
-	    var _tags;
-	    var _countryCode;
-	    var _addressFormats = [{
-	        format: [
-	            ['housenumber', 'street'],
-	            ['city', 'postcode']
-	        ]
-	      }];
+	    if (_notesEnabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadNotes(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
-	    _mainFileFetcher.get('address_formats')
-	        .then(function(d) {
-	            _addressFormats = d;
-	            if (!_selection.empty()) {
-	                _selection.call(address);
-	            }
-	        })
-	        .catch(function() { /* ignore */ });
-
-
-	    function getNearStreets() {
-	        var extent = combinedEntityExtent();
-	        var l = extent.center();
-	        var box = geoExtent(l).padByMeters(200);
-
-	        var streets = context.history().intersects(box)
-	            .filter(isAddressable)
-	            .map(function(d) {
-	                var loc = context.projection([
-	                    (extent[0][0] + extent[1][0]) / 2,
-	                    (extent[0][1] + extent[1][1]) / 2
-	                ]);
-	                var choice = geoChooseEdge(context.graph().childNodes(d), loc, context.projection);
-
-	                return {
-	                    title: d.tags.name,
-	                    value: d.tags.name,
-	                    dist: choice.distance
-	                };
-	            })
-	            .sort(function(a, b) {
-	                return a.dist - b.dist;
-	            });
 
-	        return utilArrayUniqBy(streets, 'value');
+	  drawNotes.enabled = function (val) {
+	    if (!arguments.length) return _notesEnabled;
+	    _notesEnabled = val;
 
-	        function isAddressable(d) {
-	            return d.tags.highway && d.tags.name && d.type === 'way';
-	        }
+	    if (_notesEnabled) {
+	      layerOn();
+	    } else {
+	      layerOff();
+
+	      if (context.selectedNoteID()) {
+	        context.enter(modeBrowse(context));
+	      }
 	    }
 
+	    dispatch$1.call('change');
+	    return this;
+	  };
 
-	    function getNearCities() {
-	        var extent = combinedEntityExtent();
-	        var l = extent.center();
-	        var box = geoExtent(l).padByMeters(200);
+	  return drawNotes;
+	}
 
-	        var cities = context.history().intersects(box)
-	            .filter(isAddressable)
-	            .map(function(d) {
-	                return {
-	                    title: d.tags['addr:city'] || d.tags.name,
-	                    value: d.tags['addr:city'] || d.tags.name,
-	                    dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
-	                };
-	            })
-	            .sort(function(a, b) {
-	                return a.dist - b.dist;
-	            });
+	function svgTouch() {
+	  function drawTouch(selection) {
+	    selection.selectAll('.layer-touch').data(['areas', 'lines', 'points', 'turns', 'markers']).enter().append('g').attr('class', function (d) {
+	      return 'layer-touch ' + d;
+	    });
+	  }
 
-	        return utilArrayUniqBy(cities, 'value');
+	  return drawTouch;
+	}
 
+	function refresh(selection, node) {
+	  var cr = node.getBoundingClientRect();
+	  var prop = [cr.width, cr.height];
+	  selection.property('__dimensions__', prop);
+	  return prop;
+	}
 
-	        function isAddressable(d) {
-	            if (d.tags.name) {
-	                if (d.tags.admin_level === '8' && d.tags.boundary === 'administrative')
-	                    { return true; }
-	                if (d.tags.border_type === 'city')
-	                    { return true; }
-	                if (d.tags.place === 'city' || d.tags.place === 'town' || d.tags.place === 'village')
-	                    { return true; }
-	            }
+	function utilGetDimensions(selection, force) {
+	  if (!selection || selection.empty()) {
+	    return [0, 0];
+	  }
 
-	            if (d.tags['addr:city'])
-	                { return true; }
+	  var node = selection.node(),
+	      cached = selection.property('__dimensions__');
+	  return !cached || force ? refresh(selection, node) : cached;
+	}
+	function utilSetDimensions(selection, dimensions) {
+	  if (!selection || selection.empty()) {
+	    return selection;
+	  }
 
-	            return false;
-	        }
-	    }
+	  var node = selection.node();
 
-	    function getNearValues(key) {
-	        var extent = combinedEntityExtent();
-	        var l = extent.center();
-	        var box = geoExtent(l).padByMeters(200);
+	  if (dimensions === null) {
+	    refresh(selection, node);
+	    return selection;
+	  }
 
-	        var results = context.history().intersects(box)
-	            .filter(function hasTag(d) { return _entityIDs.indexOf(d.id) === -1 && d.tags[key]; })
-	            .map(function(d) {
-	                return {
-	                    title: d.tags[key],
-	                    value: d.tags[key],
-	                    dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
-	                };
-	            })
-	            .sort(function(a, b) {
-	                return a.dist - b.dist;
-	            });
+	  return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
+	}
 
-	        return utilArrayUniqBy(results, 'value');
-	    }
+	function svgLayers(projection, context) {
+	  var dispatch$1 = dispatch('change');
+	  var svg = select(null);
+	  var _layers = [{
+	    id: 'osm',
+	    layer: svgOsm(projection, context, dispatch$1)
+	  }, {
+	    id: 'notes',
+	    layer: svgNotes(projection, context, dispatch$1)
+	  }, {
+	    id: 'data',
+	    layer: svgData(projection, context, dispatch$1)
+	  }, {
+	    id: 'keepRight',
+	    layer: svgKeepRight(projection, context, dispatch$1)
+	  }, {
+	    id: 'improveOSM',
+	    layer: svgImproveOSM(projection, context, dispatch$1)
+	  }, {
+	    id: 'osmose',
+	    layer: svgOsmose(projection, context, dispatch$1)
+	  }, {
+	    id: 'streetside',
+	    layer: svgStreetside(projection, context, dispatch$1)
+	  }, {
+	    id: 'mapillary',
+	    layer: svgMapillaryImages(projection, context, dispatch$1)
+	  }, {
+	    id: 'mapillary-position',
+	    layer: svgMapillaryPosition(projection, context)
+	  }, {
+	    id: 'mapillary-map-features',
+	    layer: svgMapillaryMapFeatures(projection, context, dispatch$1)
+	  }, {
+	    id: 'mapillary-signs',
+	    layer: svgMapillarySigns(projection, context, dispatch$1)
+	  }, {
+	    id: 'openstreetcam',
+	    layer: svgOpenstreetcamImages(projection, context, dispatch$1)
+	  }, {
+	    id: 'debug',
+	    layer: svgDebug(projection, context)
+	  }, {
+	    id: 'geolocate',
+	    layer: svgGeolocate(projection)
+	  }, {
+	    id: 'touch',
+	    layer: svgTouch()
+	  }];
+
+	  function drawLayers(selection) {
+	    svg = selection.selectAll('.surface').data([0]);
+	    svg = svg.enter().append('svg').attr('class', 'surface').merge(svg);
+	    var defs = svg.selectAll('.surface-defs').data([0]);
+	    defs.enter().append('defs').attr('class', 'surface-defs');
+	    var groups = svg.selectAll('.data-layer').data(_layers);
+	    groups.exit().remove();
+	    groups.enter().append('g').attr('class', function (d) {
+	      return 'data-layer ' + d.id;
+	    }).merge(groups).each(function (d) {
+	      select(this).call(d.layer);
+	    });
+	  }
 
+	  drawLayers.all = function () {
+	    return _layers;
+	  };
 
-	    function updateForCountryCode() {
+	  drawLayers.layer = function (id) {
+	    var obj = _layers.find(function (o) {
+	      return o.id === id;
+	    });
 
-	        if (!_countryCode) { return; }
+	    return obj && obj.layer;
+	  };
 
-	        var addressFormat;
-	        for (var i = 0; i < _addressFormats.length; i++) {
-	            var format = _addressFormats[i];
-	            if (!format.countryCodes) {
-	                addressFormat = format;   // choose the default format, keep going
-	            } else if (format.countryCodes.indexOf(_countryCode) !== -1) {
-	                addressFormat = format;   // choose the country format, stop here
-	                break;
-	            }
-	        }
+	  drawLayers.only = function (what) {
+	    var arr = [].concat(what);
 
-	        var dropdowns = addressFormat.dropdowns || [
-	            'city', 'county', 'country', 'district', 'hamlet',
-	            'neighbourhood', 'place', 'postcode', 'province',
-	            'quarter', 'state', 'street', 'subdistrict', 'suburb'
-	        ];
+	    var all = _layers.map(function (layer) {
+	      return layer.id;
+	    });
 
-	        var widths = addressFormat.widths || {
-	            housenumber: 1/3, street: 2/3,
-	            city: 2/3, state: 1/4, postcode: 1/3
-	        };
+	    return drawLayers.remove(utilArrayDifference(all, arr));
+	  };
 
-	        function row(r) {
-	            // Normalize widths.
-	            var total = r.reduce(function(sum, key) {
-	                return sum + (widths[key] || 0.5);
-	            }, 0);
+	  drawLayers.remove = function (what) {
+	    var arr = [].concat(what);
+	    arr.forEach(function (id) {
+	      _layers = _layers.filter(function (o) {
+	        return o.id !== id;
+	      });
+	    });
+	    dispatch$1.call('change');
+	    return this;
+	  };
 
-	            return r.map(function(key) {
-	                return {
-	                    id: key,
-	                    width: (widths[key] || 0.5) / total
-	                };
-	            });
-	        }
+	  drawLayers.add = function (what) {
+	    var arr = [].concat(what);
+	    arr.forEach(function (obj) {
+	      if ('id' in obj && 'layer' in obj) {
+	        _layers.push(obj);
+	      }
+	    });
+	    dispatch$1.call('change');
+	    return this;
+	  };
 
-	        var rows = _wrap.selectAll('.addr-row')
-	            .data(addressFormat.format, function(d) {
-	                return d.toString();
-	            });
+	  drawLayers.dimensions = function (val) {
+	    if (!arguments.length) return utilGetDimensions(svg);
+	    utilSetDimensions(svg, val);
+	    return this;
+	  };
 
-	        rows.exit()
-	            .remove();
+	  return utilRebind(drawLayers, dispatch$1, 'on');
+	}
 
-	        rows
-	            .enter()
-	            .append('div')
-	            .attr('class', 'addr-row')
-	            .selectAll('input')
-	            .data(row)
-	            .enter()
-	            .append('input')
-	            .property('type', 'text')
-	            .call(updatePlaceholder)
-	            .attr('class', function (d) { return 'addr-' + d.id; })
-	            .call(utilNoAuto)
-	            .each(addDropdown)
-	            .style('width', function (d) { return d.width * 100 + '%'; });
-
-
-	        function addDropdown(d) {
-	            if (dropdowns.indexOf(d.id) === -1) { return; }  // not a dropdown
-
-	            var nearValues = (d.id === 'street') ? getNearStreets
-	                : (d.id === 'city') ? getNearCities
-	                : getNearValues;
-
-	            select(this)
-	                .call(uiCombobox(context, 'address-' + d.id)
-	                    .minItems(1)
-	                    .caseSensitive(true)
-	                    .fetcher(function(value, callback) {
-	                        callback(nearValues('addr:' + d.id));
-	                    })
-	                );
-	        }
+	function svgLines(projection, context) {
+	  var detected = utilDetect();
+	  var highway_stack = {
+	    motorway: 0,
+	    motorway_link: 1,
+	    trunk: 2,
+	    trunk_link: 3,
+	    primary: 4,
+	    primary_link: 5,
+	    secondary: 6,
+	    tertiary: 7,
+	    unclassified: 8,
+	    residential: 9,
+	    service: 10,
+	    footway: 11
+	  };
+
+	  function drawTargets(selection, graph, entities, filter) {
+	    var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+	    var getPath = svgPath(projection).geojson;
+	    var activeID = context.activeID();
+	    var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways
+
+	    var data = {
+	      targets: [],
+	      nopes: []
+	    };
+	    entities.forEach(function (way) {
+	      var features = svgSegmentWay(way, graph, activeID);
+	      data.targets.push.apply(data.targets, features.passive);
+	      data.nopes.push.apply(data.nopes, features.active);
+	    }); // Targets allow hover and vertex snapping
+
+	    var targetData = data.targets.filter(getPath);
+	    var targets = selection.selectAll('.line.target-allowed').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(targetData, function key(d) {
+	      return d.id;
+	    }); // exit
+
+	    targets.exit().remove();
+
+	    var segmentWasEdited = function segmentWasEdited(d) {
+	      var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+
+	      if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+	        return false;
+	      }
 
-	        _wrap.selectAll('input')
-	            .on('blur', change())
-	            .on('change', change());
+	      return d.properties.nodes.some(function (n) {
+	        return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
+	      });
+	    }; // enter/update
 
-	        _wrap.selectAll('input:not(.combobox-input)')
-	            .on('input', change(true));
 
-	        if (_tags) { updateTags(_tags); }
-	    }
+	    targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
+	      return 'way line target target-allowed ' + targetClass + d.id;
+	    }).classed('segment-edited', segmentWasEdited); // NOPE
 
+	    var nopeData = data.nopes.filter(getPath);
+	    var nopes = selection.selectAll('.line.target-nope').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(nopeData, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	    function address(selection) {
-	        _selection = selection;
+	    nopes.exit().remove(); // enter/update
 
-	        _wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
+	      return 'way line target target-nope ' + nopeClass + d.id;
+	    }).classed('segment-edited', segmentWasEdited);
+	  }
 
-	        _wrap = _wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(_wrap);
+	  function drawLines(selection, graph, entities, filter) {
+	    var base = context.history().base();
 
-	        var extent = combinedEntityExtent();
+	    function waystack(a, b) {
+	      var selected = context.selectedIDs();
+	      var scoreA = selected.indexOf(a.id) !== -1 ? 20 : 0;
+	      var scoreB = selected.indexOf(b.id) !== -1 ? 20 : 0;
 
-	        if (extent) {
-	            var countryCode;
-	            if (context.inIntro()) {
-	                // localize the address format for the walkthrough
-	                countryCode = _t('intro.graph.countrycode');
-	            } else {
-	                var center = extent.center();
-	                countryCode = iso1A2Code(center);
-	            }
-	            if (countryCode) {
-	                _countryCode = countryCode.toLowerCase();
-	                updateForCountryCode();
-	            }
-	        }
-	    }
+	      if (a.tags.highway) {
+	        scoreA -= highway_stack[a.tags.highway];
+	      }
 
+	      if (b.tags.highway) {
+	        scoreB -= highway_stack[b.tags.highway];
+	      }
 
-	    function change(onInput) {
-	        return function() {
-	            var tags = {};
+	      return scoreA - scoreB;
+	    }
 
-	            _wrap.selectAll('input')
-	                .each(function (subfield) {
-	                    var key = field.key + ':' + subfield.id;
+	    function drawLineGroup(selection, klass, isSelected) {
+	      // Note: Don't add `.selected` class in draw modes
+	      var mode = context.mode();
+	      var isDrawing = mode && /^draw/.test(mode.id);
+	      var selectedClass = !isDrawing && isSelected ? 'selected ' : '';
+	      var lines = selection.selectAll('path').filter(filter).data(getPathData(isSelected), osmEntity.key);
+	      lines.exit().remove(); // Optimization: Call expensive TagClasses only on enter selection. This
+	      // works because osmEntity.key is defined to include the entity v attribute.
 
-	                    var value = this.value;
-	                    if (!onInput) { value = context.cleanTagValue(value); }
+	      lines.enter().append('path').attr('class', function (d) {
+	        var prefix = 'way line'; // if this line isn't styled by its own tags
 
-	                    // don't override multiple values with blank string
-	                    if (Array.isArray(_tags[key]) && !value) { return; }
+	        if (!d.hasInterestingTags()) {
+	          var parentRelations = graph.parentRelations(d);
+	          var parentMultipolygons = parentRelations.filter(function (relation) {
+	            return relation.isMultipolygon();
+	          }); // and if it's a member of at least one multipolygon relation
 
-	                    tags[key] = value || undefined;
-	                });
+	          if (parentMultipolygons.length > 0 && // and only multipolygon relations
+	          parentRelations.length === parentMultipolygons.length) {
+	            // then fudge the classes to style this as an area edge
+	            prefix = 'relation area';
+	          }
+	        }
 
-	            dispatch$1.call('change', this, tags, onInput);
-	        };
+	        var oldMPClass = oldMultiPolygonOuters[d.id] ? 'old-multipolygon ' : '';
+	        return prefix + ' ' + klass + ' ' + selectedClass + oldMPClass + d.id;
+	      }).classed('added', function (d) {
+	        return !base.entities[d.id];
+	      }).classed('geometry-edited', function (d) {
+	        return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
+	      }).classed('retagged', function (d) {
+	        return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+	      }).call(svgTagClasses()).merge(lines).sort(waystack).attr('d', getPath).call(svgTagClasses().tags(svgRelationMemberTags(graph)));
+	      return selection;
 	    }
 
-	    function updatePlaceholder(inputSelection) {
-	        return inputSelection.attr('placeholder', function(subfield) {
-	            if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
-	                return _t('inspector.multiple_values');
-	            }
-	            if (_countryCode) {
-	                var localkey = subfield.id + '!' + _countryCode;
-	                var tkey = addrField.strings.placeholders[localkey] ? localkey : subfield.id;
-	                return addrField.t('placeholders.' + tkey);
-	            }
+	    function getPathData(isSelected) {
+	      return function () {
+	        var layer = this.parentNode.__data__;
+	        var data = pathdata[layer] || [];
+	        return data.filter(function (d) {
+	          if (isSelected) return context.selectedIDs().indexOf(d.id) !== -1;else return context.selectedIDs().indexOf(d.id) === -1;
 	        });
+	      };
 	    }
 
+	    function addMarkers(layergroup, pathclass, groupclass, groupdata, marker) {
+	      var markergroup = layergroup.selectAll('g.' + groupclass).data([pathclass]);
+	      markergroup = markergroup.enter().append('g').attr('class', groupclass).merge(markergroup);
+	      var markers = markergroup.selectAll('path').filter(filter).data(function data() {
+	        return groupdata[this.parentNode.__data__] || [];
+	      }, function key(d) {
+	        return [d.id, d.index];
+	      });
+	      markers.exit().remove();
+	      markers = markers.enter().append('path').attr('class', pathclass).merge(markers).attr('marker-mid', marker).attr('d', function (d) {
+	        return d.d;
+	      });
 
-	    function updateTags(tags) {
-	        utilGetSetValue(_wrap.selectAll('input'), function (subfield) {
-	                var val = tags[field.key + ':' + subfield.id];
-	                return typeof val === 'string' ? val : '';
-	            })
-	            .attr('title', function(subfield) {
-	                var val = tags[field.key + ':' + subfield.id];
-	                return val && Array.isArray(val) && val.filter(Boolean).join('\n');
-	            })
-	            .classed('mixed', function(subfield) {
-	                return Array.isArray(tags[field.key + ':' + subfield.id]);
-	            })
-	            .call(updatePlaceholder);
+	      if (detected.ie) {
+	        markers.each(function () {
+	          this.parentNode.insertBefore(this, this);
+	        });
+	      }
 	    }
 
-
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	    var getPath = svgPath(projection, graph);
+	    var ways = [];
+	    var onewaydata = {};
+	    var sideddata = {};
+	    var oldMultiPolygonOuters = {};
+
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      var outer = osmOldMultipolygonOuterMember(entity, graph);
+
+	      if (outer) {
+	        ways.push(entity.mergeTags(outer.tags));
+	        oldMultiPolygonOuters[outer.id] = true;
+	      } else if (entity.geometry(graph) === 'line') {
+	        ways.push(entity);
+	      }
 	    }
 
+	    ways = ways.filter(getPath);
+	    var pathdata = utilArrayGroupBy(ways, function (way) {
+	      return way.layer();
+	    });
+	    Object.keys(pathdata).forEach(function (k) {
+	      var v = pathdata[k];
+	      var onewayArr = v.filter(function (d) {
+	        return d.isOneWay();
+	      });
+	      var onewaySegments = svgMarkerSegments(projection, graph, 35, function shouldReverse(entity) {
+	        return entity.tags.oneway === '-1';
+	      }, function bothDirections(entity) {
+	        return entity.tags.oneway === 'reversible' || entity.tags.oneway === 'alternating';
+	      });
+	      onewaydata[k] = utilArrayFlatten(onewayArr.map(onewaySegments));
+	      var sidedArr = v.filter(function (d) {
+	        return d.isSided();
+	      });
+	      var sidedSegments = svgMarkerSegments(projection, graph, 30, function shouldReverse() {
+	        return false;
+	      }, function bothDirections() {
+	        return false;
+	      });
+	      sideddata[k] = utilArrayFlatten(sidedArr.map(sidedSegments));
+	    });
+	    var covered = selection.selectAll('.layer-osm.covered'); // under areas
 
-	    address.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return address;
-	    };
-
-
-	    address.tags = function(tags) {
-	        _tags = tags;
-	        updateTags(tags);
-	    };
+	    var uncovered = selection.selectAll('.layer-osm.lines'); // over areas
 
+	    var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..
 
-	    address.focus = function() {
-	        var node = _wrap.selectAll('input').node();
-	        if (node) { node.focus(); }
-	    };
+	    [covered, uncovered].forEach(function (selection) {
+	      var range$1 = selection === covered ? range(-10, 0) : range(0, 11);
+	      var layergroup = selection.selectAll('g.layergroup').data(range$1);
+	      layergroup = layergroup.enter().append('g').attr('class', function (d) {
+	        return 'layergroup layer' + String(d);
+	      }).merge(layergroup);
+	      layergroup.selectAll('g.linegroup').data(['shadow', 'casing', 'stroke', 'shadow-highlighted', 'casing-highlighted', 'stroke-highlighted']).enter().append('g').attr('class', function (d) {
+	        return 'linegroup line-' + d;
+	      });
+	      layergroup.selectAll('g.line-shadow').call(drawLineGroup, 'shadow', false);
+	      layergroup.selectAll('g.line-casing').call(drawLineGroup, 'casing', false);
+	      layergroup.selectAll('g.line-stroke').call(drawLineGroup, 'stroke', false);
+	      layergroup.selectAll('g.line-shadow-highlighted').call(drawLineGroup, 'shadow', true);
+	      layergroup.selectAll('g.line-casing-highlighted').call(drawLineGroup, 'casing', true);
+	      layergroup.selectAll('g.line-stroke-highlighted').call(drawLineGroup, 'stroke', true);
+	      addMarkers(layergroup, 'oneway', 'onewaygroup', onewaydata, 'url(#ideditor-oneway-marker)');
+	      addMarkers(layergroup, 'sided', 'sidedgroup', sideddata, function marker(d) {
+	        var category = graph.entity(d.id).sidednessIdentifier();
+	        return 'url(#ideditor-sided-marker-' + category + ')';
+	      });
+	    }); // Draw touch targets..
 
+	    touchLayer.call(drawTargets, graph, ways, filter);
+	  }
 
-	    return utilRebind(address, dispatch$1, 'on');
+	  return drawLines;
 	}
 
-	function uiFieldCycleway(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var items = select(null);
-	    var wrap = select(null);
-	    var _tags;
-
-	    function cycleway(selection) {
+	function svgMidpoints(projection, context) {
+	  var targetRadius = 8;
 
-	        function stripcolon(s) {
-	            return s.replace(':', '');
+	  function drawTargets(selection, graph, entities, filter) {
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var getTransform = svgPointTransform(projection).geojson;
+	    var data = entities.map(function (midpoint) {
+	      return {
+	        type: 'Feature',
+	        id: midpoint.id,
+	        properties: {
+	          target: true,
+	          entity: midpoint
+	        },
+	        geometry: {
+	          type: 'Point',
+	          coordinates: midpoint.loc
 	        }
+	      };
+	    });
+	    var targets = selection.selectAll('.midpoint.target').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data, function key(d) {
+	      return d.id;
+	    }); // exit
 
+	    targets.exit().remove(); // enter/update
 
-	        wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
+	      return 'node midpoint target ' + fillClass + d.id;
+	    }).attr('transform', getTransform);
+	  }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  function drawMidpoints(selection, graph, entities, filter, extent) {
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.midpoints');
+	    var touchLayer = selection.selectAll('.layer-touch.points');
+	    var mode = context.mode();
 
+	    if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
+	      drawLayer.selectAll('.midpoint').remove();
+	      touchLayer.selectAll('.midpoint.target').remove();
+	      return;
+	    }
 
-	        var div = wrap.selectAll('ul')
-	            .data([0]);
+	    var poly = extent.polygon();
+	    var midpoints = {};
 
-	        div = div.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(div);
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (entity.type !== 'way') continue;
+	      if (!filter(entity)) continue;
+	      if (context.selectedIDs().indexOf(entity.id) < 0) continue;
+	      var nodes = graph.childNodes(entity);
 
-	        var keys = ['cycleway:left', 'cycleway:right'];
+	      for (var j = 0; j < nodes.length - 1; j++) {
+	        var a = nodes[j];
+	        var b = nodes[j + 1];
+	        var id = [a.id, b.id].sort().join('-');
 
-	        items = div.selectAll('li')
-	            .data(keys);
+	        if (midpoints[id]) {
+	          midpoints[id].parents.push(entity);
+	        } else if (geoVecLength(projection(a.loc), projection(b.loc)) > 40) {
+	          var point = geoVecInterp(a.loc, b.loc, 0.5);
+	          var loc = null;
 
-	        var enter = items.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'labeled-input preset-cycleway-' + stripcolon(d); });
+	          if (extent.intersects(point)) {
+	            loc = point;
+	          } else {
+	            for (var k = 0; k < 4; k++) {
+	              point = geoLineIntersection([a.loc, b.loc], [poly[k], poly[k + 1]]);
 
-	        enter
-	            .append('span')
-	            .attr('class', 'label preset-label-cycleway')
-	            .attr('for', function(d) { return 'preset-input-cycleway-' + stripcolon(d); })
-	            .text(function(d) { return field.t('types.' + d); });
+	              if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
+	                loc = point;
+	                break;
+	              }
+	            }
+	          }
 
-	        enter
-	            .append('div')
-	            .attr('class', 'preset-input-cycleway-wrap')
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', function(d) { return 'preset-input-cycleway preset-input-' + stripcolon(d); })
-	            .call(utilNoAuto)
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiCombobox(context, 'cycleway-' + stripcolon(d))
-	                        .data(cycleway.options(d))
-	                    );
-	            });
+	          if (loc) {
+	            midpoints[id] = {
+	              type: 'midpoint',
+	              id: id,
+	              loc: loc,
+	              edge: [a.id, b.id],
+	              parents: [entity]
+	            };
+	          }
+	        }
+	      }
+	    }
 
-	        items = items.merge(enter);
+	    function midpointFilter(d) {
+	      if (midpoints[d.id]) return true;
 
-	        // Update
-	        wrap.selectAll('.preset-input-cycleway')
-	            .on('change', change)
-	            .on('blur', change);
+	      for (var i = 0; i < d.parents.length; i++) {
+	        if (filter(d.parents[i])) {
+	          return true;
+	        }
+	      }
+
+	      return false;
 	    }
 
+	    var groups = drawLayer.selectAll('.midpoint').filter(midpointFilter).data(Object.values(midpoints), function (d) {
+	      return d.id;
+	    });
+	    groups.exit().remove();
+	    var enter = groups.enter().insert('g', ':first-child').attr('class', 'midpoint');
+	    enter.append('polygon').attr('points', '-6,8 10,0 -6,-8').attr('class', 'shadow');
+	    enter.append('polygon').attr('points', '-3,4 5,0 -3,-4').attr('class', 'fill');
+	    groups = groups.merge(enter).attr('transform', function (d) {
+	      var translate = svgPointTransform(projection);
+	      var a = graph.entity(d.edge[0]);
+	      var b = graph.entity(d.edge[1]);
+	      var angle = geoAngle(a, b, projection) * (180 / Math.PI);
+	      return translate(d) + ' rotate(' + angle + ')';
+	    }).call(svgTagClasses().tags(function (d) {
+	      return d.parents[0].tags;
+	    })); // Propagate data bindings.
 
-	    function change(key) {
+	    groups.select('polygon.shadow');
+	    groups.select('polygon.fill'); // Draw touch targets..
 
-	        var newValue = context.cleanTagValue(utilGetSetValue(select(this)));
+	    touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+	  }
 
-	        // don't override multiple values with blank string
-	        if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) { return; }
+	  return drawMidpoints;
+	}
 
-	        if (newValue === 'none' || newValue === '') { newValue = undefined; }
+	function svgPoints(projection, context) {
+	  function markerPath(selection, klass) {
+	    selection.attr('class', klass).attr('transform', 'translate(-8, -23)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+	  }
 
-	        var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
-	        var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
-	        if (otherValue && Array.isArray(otherValue)) {
-	            // we must always have an explicit value for comparison
-	            otherValue = otherValue[0];
-	        }
-	        if (otherValue === 'none' || otherValue === '') { otherValue = undefined; }
+	  function sortY(a, b) {
+	    return b.loc[1] - a.loc[1];
+	  } // Avoid exit/enter if we're just moving stuff around.
+	  // The node will get a new version but we only need to run the update selection.
 
-	        var tag = {};
 
-	        // If the left and right tags match, use the cycleway tag to tag both
-	        // sides the same way
-	        if (newValue === otherValue) {
-	            tag = {
-	                cycleway: newValue,
-	                'cycleway:left': undefined,
-	                'cycleway:right': undefined
-	            };
-	        } else {
-	            // Always set both left and right as changing one can affect the other
-	            tag = {
-	                cycleway: undefined
-	            };
-	            tag[key] = newValue;
-	            tag[otherKey] = otherValue;
-	        }
+	  function fastEntityKey(d) {
+	    var mode = context.mode();
+	    var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+	    return isMoving ? d.id : osmEntity.key(d);
+	  }
 
-	        dispatch$1.call('change', this, tag);
-	    }
+	  function drawTargets(selection, graph, entities, filter) {
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var getTransform = svgPointTransform(projection).geojson;
+	    var activeID = context.activeID();
+	    var data = [];
+	    entities.forEach(function (node) {
+	      if (activeID === node.id) return; // draw no target on the activeID
 
+	      data.push({
+	        type: 'Feature',
+	        id: node.id,
+	        properties: {
+	          target: true,
+	          entity: node
+	        },
+	        geometry: node.asGeoJSON()
+	      });
+	    });
+	    var targets = selection.selectAll('.point.target').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data, function key(d) {
+	      return d.id;
+	    }); // exit
+
+	    targets.exit().remove(); // enter/update
+
+	    targets.enter().append('rect').attr('x', -10).attr('y', -26).attr('width', 20).attr('height', 30).merge(targets).attr('class', function (d) {
+	      return 'node point target ' + fillClass + d.id;
+	    }).attr('transform', getTransform);
+	  }
+
+	  function drawPoints(selection, graph, entities, filter) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    var base = context.history().base(); // Points with a direction will render as vertices at higher zooms..
+
+	    function renderAsPoint(entity) {
+	      return entity.geometry(graph) === 'point' && !(zoom >= 18 && entity.directions(graph, projection).length);
+	    } // All points will render as vertices in wireframe mode too..
+
+
+	    var points = wireframe ? [] : entities.filter(renderAsPoint);
+	    points.sort(sortY);
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.points');
+	    var touchLayer = selection.selectAll('.layer-touch.points'); // Draw points..
+
+	    var groups = drawLayer.selectAll('g.point').filter(filter).data(points, fastEntityKey);
+	    groups.exit().remove();
+	    var enter = groups.enter().append('g').attr('class', function (d) {
+	      return 'node point ' + d.id;
+	    }).order();
+	    enter.append('path').call(markerPath, 'shadow');
+	    enter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+	    enter.append('path').call(markerPath, 'stroke');
+	    enter.append('use').attr('transform', 'translate(-5, -19)').attr('class', 'icon').attr('width', '11px').attr('height', '11px');
+	    groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('added', function (d) {
+	      return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
+	    }).classed('moved', function (d) {
+	      return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
+	    }).classed('retagged', function (d) {
+	      return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+	    }).call(svgTagClasses());
+	    groups.select('.shadow'); // propagate bound data
+
+	    groups.select('.stroke'); // propagate bound data
+
+	    groups.select('.icon') // propagate bound data
+	    .attr('xlink:href', function (entity) {
+	      var preset = _mainPresetIndex.match(entity, graph);
+	      var picon = preset && preset.icon;
+
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return '#' + picon + (isMaki ? '-11' : '');
+	      }
+	    }); // Draw touch targets..
 
-	    cycleway.options = function() {
-	        return Object.keys(field.strings.options).map(function(option) {
-	            return {
-	                title: field.t('options.' + option + '.description'),
-	                value: option
-	            };
-	        });
-	    };
+	    touchLayer.call(drawTargets, graph, points, filter);
+	  }
 
+	  return drawPoints;
+	}
 
-	    cycleway.tags = function(tags) {
-	        _tags = tags;
+	function svgTurns(projection, context) {
+	  function icon(turn) {
+	    var u = turn.u ? '-u' : '';
+	    if (turn.no) return '#iD-turn-no' + u;
+	    if (turn.only) return '#iD-turn-only' + u;
+	    return '#iD-turn-yes' + u;
+	  }
 
-	        // If cycleway is set, use that instead of individual values
-	        var commonValue = typeof tags.cycleway === 'string' && tags.cycleway;
+	  function drawTurns(selection, graph, turns) {
+	    function turnTransform(d) {
+	      var pxRadius = 50;
+	      var toWay = graph.entity(d.to.way);
+	      var toPoints = graph.childNodes(toWay).map(function (n) {
+	        return n.loc;
+	      }).map(projection);
+	      var toLength = geoPathLength(toPoints);
+	      var mid = toLength / 2; // midpoint of destination way
 
-	        utilGetSetValue(items.selectAll('.preset-input-cycleway'), function(d) {
-	                if (commonValue) { return commonValue; }
-	                return !tags.cycleway && typeof tags[d] === 'string' ? tags[d] : '';
-	            })
-	            .attr('title', function(d) {
-	                if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
-	                    var vals = [];
-	                    if (Array.isArray(tags.cycleway)) {
-	                        vals = vals.concat(tags.cycleway);
-	                    }
-	                    if (Array.isArray(tags[d])) {
-	                        vals = vals.concat(tags[d]);
-	                    }
-	                    return vals.filter(Boolean).join('\n');
-	                }
-	                return null;
-	            })
-	            .attr('placeholder', function(d) {
-	                if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
-	                    return _t('inspector.multiple_values');
-	                }
-	                return field.placeholder();
-	            })
-	            .classed('mixed', function(d) {
-	                return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
-	            });
-	    };
+	      var toNode = graph.entity(d.to.node);
+	      var toVertex = graph.entity(d.to.vertex);
+	      var a = geoAngle(toVertex, toNode, projection);
+	      var o = projection(toVertex.loc);
+	      var r = d.u ? 0 // u-turn: no radius
+	      : !toWay.__via ? pxRadius // leaf way: put marker at pxRadius
+	      : Math.min(mid, pxRadius); // via way: prefer pxRadius, fallback to mid for very short ways
 
+	      return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
+	    }
 
-	    cycleway.focus = function() {
-	        var node = wrap.selectAll('input').node();
-	        if (node) { node.focus(); }
-	    };
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
+	    var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..
 
+	    var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
+	      return d.key;
+	    }); // exit
 
-	    return utilRebind(cycleway, dispatch$1, 'on');
-	}
+	    groups.exit().remove(); // enter
 
-	function uiFieldLanes(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var LANE_WIDTH = 40;
-	    var LANE_HEIGHT = 200;
-	    var _entityIDs = [];
+	    var groupsEnter = groups.enter().append('g').attr('class', function (d) {
+	      return 'turn ' + d.key;
+	    });
+	    var turnsEnter = groupsEnter.filter(function (d) {
+	      return !d.u;
+	    });
+	    turnsEnter.append('rect').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+	    turnsEnter.append('use').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+	    var uEnter = groupsEnter.filter(function (d) {
+	      return d.u;
+	    });
+	    uEnter.append('circle').attr('r', '16');
+	    uEnter.append('use').attr('transform', 'translate(-16, -16)').attr('width', '32').attr('height', '32'); // update
 
-	    function lanes(selection) {
-	        var lanesData = context.entity(_entityIDs[0]).lanes();
+	    groups = groups.merge(groupsEnter).attr('opacity', function (d) {
+	      return d.direct === false ? '0.7' : null;
+	    }).attr('transform', turnTransform);
+	    groups.select('use').attr('xlink:href', icon);
+	    groups.select('rect'); // propagate bound data
 
-	        if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
-	            selection.call(lanes.off);
-	            return;
-	        }
+	    groups.select('circle'); // propagate bound data
+	    // Draw touch targets..
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
+	      return d.key;
+	    }); // exit
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	    groups.exit().remove(); // enter
 
-	        var surface =  wrap.selectAll('.surface')
-	            .data([0]);
+	    groupsEnter = groups.enter().append('g').attr('class', function (d) {
+	      return 'turn ' + d.key;
+	    });
+	    turnsEnter = groupsEnter.filter(function (d) {
+	      return !d.u;
+	    });
+	    turnsEnter.append('rect').attr('class', 'target ' + fillClass).attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+	    uEnter = groupsEnter.filter(function (d) {
+	      return d.u;
+	    });
+	    uEnter.append('circle').attr('class', 'target ' + fillClass).attr('r', '16'); // update
 
-	        var d = utilGetDimensions(wrap);
-	        var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
+	    groups = groups.merge(groupsEnter).attr('transform', turnTransform);
+	    groups.select('rect'); // propagate bound data
 
-	        surface = surface.enter()
-	            .append('svg')
-	            .attr('width', d[0])
-	            .attr('height', 300)
-	            .attr('class', 'surface')
-	            .merge(surface);
+	    groups.select('circle'); // propagate bound data
 
+	    return this;
+	  }
 
-	        var lanesSelection = surface.selectAll('.lanes')
-	            .data([0]);
+	  return drawTurns;
+	}
 
-	        lanesSelection = lanesSelection.enter()
-	            .append('g')
-	            .attr('class', 'lanes')
-	            .merge(lanesSelection);
+	function svgVertices(projection, context) {
+	  var radiuses = {
+	    //       z16-, z17,   z18+,  w/icon
+	    shadow: [6, 7.5, 7.5, 12],
+	    stroke: [2.5, 3.5, 3.5, 8],
+	    fill: [1, 1.5, 1.5, 1.5]
+	  };
 
-	        lanesSelection
-	            .attr('transform', function () {
-	                return 'translate(' + (freeSpace / 2) + ', 0)';
-	            });
+	  var _currHoverTarget;
 
+	  var _currPersistent = {};
+	  var _currHover = {};
+	  var _prevHover = {};
+	  var _currSelected = {};
+	  var _prevSelected = {};
+	  var _radii = {};
 
-	        var lane = lanesSelection.selectAll('.lane')
-	           .data(lanesData.lanes);
-
-	        lane.exit()
-	            .remove();
-
-	        var enter = lane.enter()
-	            .append('g')
-	            .attr('class', 'lane');
-
-	        enter
-	            .append('g')
-	            .append('rect')
-	            .attr('y', 50)
-	            .attr('width', LANE_WIDTH)
-	            .attr('height', LANE_HEIGHT);
-
-	        enter
-	            .append('g')
-	            .attr('class', 'forward')
-	            .append('text')
-	            .attr('y', 40)
-	            .attr('x', 14)
-	            .text('▲');
-
-	        enter
-	            .append('g')
-	            .attr('class', 'bothways')
-	            .append('text')
-	            .attr('y', 40)
-	            .attr('x', 14)
-	            .text('▲▼');
-
-	        enter
-	            .append('g')
-	            .attr('class', 'backward')
-	            .append('text')
-	            .attr('y', 40)
-	            .attr('x', 14)
-	            .text('▼');
-
-
-	        lane = lane
-	            .merge(enter);
-
-	        lane
-	            .attr('transform', function(d) {
-	                return 'translate(' + (LANE_WIDTH * d.index * 1.5) + ', 0)';
-	            });
+	  function sortY(a, b) {
+	    return b.loc[1] - a.loc[1];
+	  } // Avoid exit/enter if we're just moving stuff around.
+	  // The node will get a new version but we only need to run the update selection.
 
-	        lane.select('.forward')
-	            .style('visibility', function(d) {
-	                return d.direction === 'forward' ? 'visible' : 'hidden';
-	            });
 
-	        lane.select('.bothways')
-	            .style('visibility', function(d) {
-	                return d.direction === 'bothways' ? 'visible' : 'hidden';
-	            });
+	  function fastEntityKey(d) {
+	    var mode = context.mode();
+	    var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+	    return isMoving ? d.id : osmEntity.key(d);
+	  }
+
+	  function draw(selection, graph, vertices, sets, filter) {
+	    sets = sets || {
+	      selected: {},
+	      important: {},
+	      hovered: {}
+	    };
+	    var icons = {};
+	    var directions = {};
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    var z = zoom < 17 ? 0 : zoom < 18 ? 1 : 2;
+	    var activeID = context.activeID();
+	    var base = context.history().base();
+
+	    function getIcon(d) {
+	      // always check latest entity, as fastEntityKey avoids enter/exit now
+	      var entity = graph.entity(d.id);
+	      if (entity.id in icons) return icons[entity.id];
+	      icons[entity.id] = entity.hasInterestingTags() && _mainPresetIndex.match(entity, graph).icon;
+	      return icons[entity.id];
+	    } // memoize directions results, return false for empty arrays (for use in filter)
+
+
+	    function getDirections(entity) {
+	      if (entity.id in directions) return directions[entity.id];
+	      var angles = entity.directions(graph, projection);
+	      directions[entity.id] = angles.length ? angles : false;
+	      return angles;
+	    }
+
+	    function updateAttributes(selection) {
+	      ['shadow', 'stroke', 'fill'].forEach(function (klass) {
+	        var rads = radiuses[klass];
+	        selection.selectAll('.' + klass).each(function (entity) {
+	          var i = z && getIcon(entity);
+	          var r = rads[i ? 3 : z]; // slightly increase the size of unconnected endpoints #3775
+
+	          if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
+	            r += 1.5;
+	          }
 
-	        lane.select('.backward')
-	            .style('visibility', function(d) {
-	                return d.direction === 'backward' ? 'visible' : 'hidden';
-	            });
+	          if (klass === 'shadow') {
+	            // remember this value, so we don't need to
+	            _radii[entity.id] = r; // recompute it when we draw the touch targets
+	          }
+
+	          select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
+	        });
+	      });
 	    }
 
+	    vertices.sort(sortY);
+	    var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit
 
-	    lanes.entityIDs = function(val) {
-	        _entityIDs = val;
-	    };
+	    groups.exit().remove(); // enter
 
-	    lanes.tags = function() {};
-	    lanes.focus = function() {};
-	    lanes.off = function() {};
+	    var enter = groups.enter().append('g').attr('class', function (d) {
+	      return 'node vertex ' + d.id;
+	    }).order();
+	    enter.append('circle').attr('class', 'shadow');
+	    enter.append('circle').attr('class', 'stroke'); // Vertices with tags get a fill.
 
-	    return utilRebind(lanes, dispatch$1, 'on');
-	}
+	    enter.filter(function (d) {
+	      return d.hasInterestingTags();
+	    }).append('circle').attr('class', 'fill'); // update
 
-	uiFieldLanes.supportsMultiselection = false;
+	    groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('sibling', function (d) {
+	      return d.id in sets.selected;
+	    }).classed('shared', function (d) {
+	      return graph.isShared(d);
+	    }).classed('endpoint', function (d) {
+	      return d.isEndpoint(graph);
+	    }).classed('added', function (d) {
+	      return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
+	    }).classed('moved', function (d) {
+	      return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
+	    }).classed('retagged', function (d) {
+	      return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+	    }).call(updateAttributes); // Vertices with icons get a `use`.
 
-	var _languagesArray = [];
+	    var iconUse = groups.selectAll('.icon').data(function data(d) {
+	      return zoom >= 17 && getIcon(d) ? [d] : [];
+	    }, fastEntityKey); // exit
 
+	    iconUse.exit().remove(); // enter
 
-	function uiFieldLocalized(field, context) {
-	    var dispatch$1 = dispatch('change', 'input');
-	    var wikipedia = services.wikipedia;
-	    var input = select(null);
-	    var localizedInputs = select(null);
-	    var _countryCode;
-	    var _tags;
+	    iconUse.enter().append('use').attr('class', 'icon').attr('width', '11px').attr('height', '11px').attr('transform', 'translate(-5.5, -5.5)').attr('xlink:href', function (d) {
+	      var picon = getIcon(d);
+	      var isMaki = /^maki-/.test(picon);
+	      return '#' + picon + (isMaki ? '-11' : '');
+	    }); // Vertices with directions get viewfields
 
+	    var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
+	      return zoom >= 18 && getDirections(d) ? [d] : [];
+	    }, fastEntityKey); // exit
 
-	    // A concern here in switching to async data means that _languagesArray will not
-	    // be available the first time through, so things like the fetchers and
-	    // the language() function will not work immediately.
-	    _mainFileFetcher.get('languages')
-	        .then(loadLanguagesArray)
-	        .catch(function() { /* ignore */ });
+	    dgroups.exit().remove(); // enter/update
 
-	    var _territoryLanguages = {};
-	    _mainFileFetcher.get('territory_languages')
-	        .then(function(d) { _territoryLanguages = d; })
-	        .catch(function() { /* ignore */ });
+	    dgroups = dgroups.enter().insert('g', '.shadow').attr('class', 'viewfieldgroup').merge(dgroups);
+	    var viewfields = dgroups.selectAll('.viewfield').data(getDirections, function key(d) {
+	      return osmEntity.key(d);
+	    }); // exit
 
+	    viewfields.exit().remove(); // enter/update
 
-	    var allSuggestions = _mainPresetIndex.collection.filter(function(p) {
-	        return p.suggestion === true;
+	    viewfields.enter().append('path').attr('class', 'viewfield').attr('d', 'M0,0H0').merge(viewfields).attr('marker-start', 'url(#ideditor-viewfield-marker' + (wireframe ? '-wireframe' : '') + ')').attr('transform', function (d) {
+	      return 'rotate(' + d + ')';
 	    });
+	  }
 
-	    // reuse these combos
-	    var langCombo = uiCombobox(context, 'localized-lang')
-	        .fetcher(fetchLanguages)
-	        .minItems(0);
-
-	    var brandCombo = uiCombobox(context, 'localized-brand')
-	        .canAutocomplete(false)
-	        .minItems(1);
-
-	    var _selection = select(null);
-	    var _multilingual = [];
-	    var _buttonTip = uiTooltip()
-	        .title(_t('translate.translate'))
-	        .placement('left');
-	    var _wikiTitles;
-	    var _entityIDs = [];
+	  function drawTargets(selection, graph, entities, filter) {
+	    var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+	    var getTransform = svgPointTransform(projection).geojson;
+	    var activeID = context.activeID();
+	    var data = {
+	      targets: [],
+	      nopes: []
+	    };
+	    entities.forEach(function (node) {
+	      if (activeID === node.id) return; // draw no target on the activeID
 
+	      var vertexType = svgPassiveVertex(node, graph, activeID);
 
-	    function loadLanguagesArray(dataLanguages) {
-	        if (_languagesArray.length !== 0) { return; }
+	      if (vertexType !== 0) {
+	        // passive or adjacent - allow to connect
+	        data.targets.push({
+	          type: 'Feature',
+	          id: node.id,
+	          properties: {
+	            target: true,
+	            entity: node
+	          },
+	          geometry: node.asGeoJSON()
+	        });
+	      } else {
+	        data.nopes.push({
+	          type: 'Feature',
+	          id: node.id + '-nope',
+	          properties: {
+	            nope: true,
+	            target: true,
+	            entity: node
+	          },
+	          geometry: node.asGeoJSON()
+	        });
+	      }
+	    }); // Targets allow hover and vertex snapping
 
-	        // some conversion is needed to ensure correct OSM tags are used
-	        var replacements = {
-	            sr: 'sr-Cyrl',      // in OSM, `sr` implies Cyrillic
-	            'sr-Cyrl': false    // `sr-Cyrl` isn't used in OSM
-	        };
+	    var targets = selection.selectAll('.vertex.target-allowed').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data.targets, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	        for (var code in dataLanguages) {
-	            if (replacements[code] === false) { continue; }
-	            var metaCode = code;
-	            if (replacements[code]) { metaCode = replacements[code]; }
+	    targets.exit().remove(); // enter/update
 
-	            _languagesArray.push({
-	                localName: _mainLocalizer.languageName(metaCode, { localOnly: true }),
-	                nativeName: dataLanguages[metaCode].nativeName,
-	                code: code,
-	                label: _mainLocalizer.languageName(metaCode)
-	            });
-	        }
-	    }
+	    targets.enter().append('circle').attr('r', function (d) {
+	      return _radii[d.id] || radiuses.shadow[3];
+	    }).merge(targets).attr('class', function (d) {
+	      return 'node vertex target target-allowed ' + targetClass + d.id;
+	    }).attr('transform', getTransform); // NOPE
 
+	    var nopes = selection.selectAll('.vertex.target-nope').filter(function (d) {
+	      return filter(d.properties.entity);
+	    }).data(data.nopes, function key(d) {
+	      return d.id;
+	    }); // exit
 
-	    function calcLocked() {
+	    nopes.exit().remove(); // enter/update
 
-	        // only lock the Name field
-	        var isLocked = field.id === 'name' &&
-	            _entityIDs.length &&
-	            // lock the field if any feature needs it
-	            _entityIDs.some(function(entityID) {
+	    nopes.enter().append('circle').attr('r', function (d) {
+	      return _radii[d.properties.entity.id] || radiuses.shadow[3];
+	    }).merge(nopes).attr('class', function (d) {
+	      return 'node vertex target target-nope ' + nopeClass + d.id;
+	    }).attr('transform', getTransform);
+	  } // Points can also render as vertices:
+	  // 1. in wireframe mode or
+	  // 2. at higher zooms if they have a direction
 
-	                var entity = context.graph().hasEntity(entityID);
-	                if (!entity) { return false; }
 
-	                var original = context.graph().base().entities[_entityIDs[0]];
-	                var hasOriginalName = original && entity.tags.name && entity.tags.name === original.tags.name;
-	                // if the name was already edited manually then allow further editing
-	                if (!hasOriginalName) { return false; }
+	  function renderAsVertex(entity, graph, wireframe, zoom) {
+	    var geometry = entity.geometry(graph);
+	    return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
+	  }
 
-	                // features linked to Wikidata are likely important and should be protected
-	                if (entity.tags.wikidata) { return true; }
+	  function isEditedNode(node, base, head) {
+	    var baseNode = base.entities[node.id];
+	    var headNode = head.entities[node.id];
+	    return !headNode || !baseNode || !fastDeepEqual(headNode.tags, baseNode.tags) || !fastDeepEqual(headNode.loc, baseNode.loc);
+	  }
 
-	                // assume the name has already been confirmed if its source has been researched
-	                if (entity.tags['name:etymology:wikidata']) { return true; }
+	  function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
+	    var results = {};
+	    var seenIds = {};
 
-	                var preset = _mainPresetIndex.match(entity, context.graph());
-	                var isSuggestion = preset && preset.suggestion;
-	                var showsBrand = preset && preset.originalFields.filter(function(d) {
-	                    return d.id === 'brand';
-	                }).length;
-	                // protect standardized brand names
-	                return isSuggestion && !showsBrand;
-	            });
+	    function addChildVertices(entity) {
+	      // avoid redundant work and infinite recursion of circular relations
+	      if (seenIds[entity.id]) return;
+	      seenIds[entity.id] = true;
+	      var geometry = entity.geometry(graph);
 
-	        field.locked(isLocked);
-	    }
+	      if (!context.features().isHiddenFeature(entity, graph, geometry)) {
+	        var i;
 
+	        if (entity.type === 'way') {
+	          for (i = 0; i < entity.nodes.length; i++) {
+	            var child = graph.hasEntity(entity.nodes[i]);
 
-	    // update _multilingual, maintaining the existing order
-	    function calcMultilingual(tags) {
-	        var existingLangsOrdered = _multilingual.map(function(item) {
-	            return item.lang;
-	        });
-	        var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
+	            if (child) {
+	              addChildVertices(child);
+	            }
+	          }
+	        } else if (entity.type === 'relation') {
+	          for (i = 0; i < entity.members.length; i++) {
+	            var member = graph.hasEntity(entity.members[i].id);
 
-	        for (var k in tags) {
-	            var m = k.match(/^(.*):([a-zA-Z_-]+)$/);
-	            if (m && m[1] === field.key && m[2]) {
-	                var item = { lang: m[2], value: tags[k] };
-	                if (existingLangs.has(item.lang)) {
-	                    // update the value
-	                    _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
-	                    existingLangs.delete(item.lang);
-	                } else {
-	                    _multilingual.push(item);
-	                }
+	            if (member) {
+	              addChildVertices(member);
 	            }
+	          }
+	        } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
+	          results[entity.id] = entity;
 	        }
-
-	        _multilingual = _multilingual.filter(function(item) {
-	            return !item.lang || !existingLangs.has(item.lang);
-	        });
+	      }
 	    }
 
+	    ids.forEach(function (id) {
+	      var entity = graph.hasEntity(id);
+	      if (!entity) return;
 
-	    function localized(selection) {
-	        _selection = selection;
-	        calcLocked();
-	        var isLocked = field.locked();
-	        var singularEntity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-	        var preset = singularEntity && _mainPresetIndex.match(singularEntity, context.graph());
-
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
-
-	        // enter/update
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
-
-	        input = wrap.selectAll('.localized-main')
-	            .data([0]);
-
-	        // enter/update
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('id', field.domId)
-	            .attr('class', 'localized-main')
-	            .call(utilNoAuto)
-	            .merge(input);
-
-	        if (preset && field.id === 'name') {
-	            var pTag = preset.id.split('/', 2);
-	            var pKey = pTag[0];
-	            var pValue = pTag[1];
-
-	            if (!preset.suggestion) {
-	                // Not a suggestion preset - Add a suggestions dropdown if it makes sense to.
-	                // This code attempts to determine if the matched preset is the
-	                // kind of preset that even can benefit from name suggestions..
-	                // - true = shops, cafes, hotels, etc. (also generic and fallback presets)
-	                // - false = churches, parks, hospitals, etc. (things not in the index)
-	                var isFallback = preset.isFallback();
-	                var goodSuggestions = allSuggestions.filter(function(s) {
-	                    if (isFallback) { return true; }
-	                    var sTag = s.id.split('/', 2);
-	                    var sKey = sTag[0];
-	                    var sValue = sTag[1];
-	                    return pKey === sKey && (!pValue || pValue === sValue);
-	                });
-
-	                // Show the suggestions.. If the user picks one, change the tags..
-	                if (allSuggestions.length && goodSuggestions.length) {
-	                    input
-	                        .on('blur.localized', checkBrandOnBlur)
-	                        .call(brandCombo
-	                            .fetcher(fetchBrandNames(preset, allSuggestions))
-	                            .on('accept', acceptBrand)
-	                            .on('cancel', cancelBrand)
-	                        );
-	                }
-	            }
+	      if (entity.type === 'node') {
+	        if (renderAsVertex(entity, graph, wireframe, zoom)) {
+	          results[entity.id] = entity;
+	          graph.parentWays(entity).forEach(function (entity) {
+	            addChildVertices(entity);
+	          });
 	        }
+	      } else {
+	        // way, relation
+	        addChildVertices(entity);
+	      }
+	    });
+	    return results;
+	  }
 
-	        input
-	            .classed('disabled', !!isLocked)
-	            .attr('readonly', isLocked || null)
-	            .on('input', change(true))
-	            .on('blur', change())
-	            .on('change', change());
+	  function drawVertices(selection, graph, entities, filter, extent, fullRedraw) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var visualDiff = context.surface().classed('highlight-edited');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    var mode = context.mode();
+	    var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+	    var base = context.history().base();
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.vertices');
+	    var touchLayer = selection.selectAll('.layer-touch.points');
+
+	    if (fullRedraw) {
+	      _currPersistent = {};
+	      _radii = {};
+	    } // Collect important vertices from the `entities` list..
+	    // (during a partial redraw, it will not contain everything)
+
+
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      var geometry = entity.geometry(graph);
+	      var keep = false; // a point that looks like a vertex..
+
+	      if (geometry === 'point' && renderAsVertex(entity, graph, wireframe, zoom)) {
+	        _currPersistent[entity.id] = entity;
+	        keep = true; // a vertex of some importance..
+	      } else if (geometry === 'vertex' && (entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || visualDiff && isEditedNode(entity, base, graph))) {
+	        _currPersistent[entity.id] = entity;
+	        keep = true;
+	      } // whatever this is, it's not a persistent vertex..
+
+
+	      if (!keep && !fullRedraw) {
+	        delete _currPersistent[entity.id];
+	      }
+	    } // 3 sets of vertices to consider:
 
 
-	        var translateButton = wrap.selectAll('.localized-add')
-	            .data([0]);
+	    var sets = {
+	      persistent: _currPersistent,
+	      // persistent = important vertices (render always)
+	      selected: _currSelected,
+	      // selected + siblings of selected (render always)
+	      hovered: _currHover // hovered + siblings of hovered (render only in draw modes)
 
-	        translateButton = translateButton.enter()
-	            .append('button')
-	            .attr('class', 'localized-add form-field-button')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-plus'))
-	            .merge(translateButton);
+	    };
+	    var all = Object.assign({}, isMoving ? _currHover : {}, _currSelected, _currPersistent); // Draw the vertices..
+	    // The filter function controls the scope of what objects d3 will touch (exit/enter/update)
+	    // Adjust the filter function to expand the scope beyond whatever entities were passed in.
 
-	        translateButton
-	            .classed('disabled', !!isLocked)
-	            .call(isLocked ? _buttonTip.destroy : _buttonTip)
-	            .on('click', addNew);
+	    var filterRendered = function filterRendered(d) {
+	      return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
+	    };
 
+	    drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
+	    // When drawing, render all targets (not just those affected by a partial redraw)
 
-	        if (_tags && !_multilingual.length) {
-	            calcMultilingual(_tags);
-	        }
+	    var filterTouch = function filterTouch(d) {
+	      return isMoving ? true : filterRendered(d);
+	    };
 
-	        localizedInputs = selection.selectAll('.localized-multilingual')
-	            .data([0]);
+	    touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);
 
-	        localizedInputs = localizedInputs.enter()
-	            .append('div')
-	            .attr('class', 'localized-multilingual')
-	            .merge(localizedInputs);
+	    function currentVisible(which) {
+	      return Object.keys(which).map(graph.hasEntity, graph) // the current version of this entity
+	      .filter(function (entity) {
+	        return entity && entity.intersects(extent, graph);
+	      });
+	    }
+	  } // partial redraw - only update the selected items..
 
-	        localizedInputs
-	            .call(renderMultilingual);
 
-	        localizedInputs.selectAll('button, input')
-	            .classed('disabled', !!isLocked)
-	            .attr('readonly', isLocked || null);
+	  drawVertices.drawSelected = function (selection, graph, extent) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    _prevSelected = _currSelected || {};
 
+	    if (context.map().isInWideSelection()) {
+	      _currSelected = {};
+	      context.selectedIDs().forEach(function (id) {
+	        var entity = graph.hasEntity(id);
+	        if (!entity) return;
 
+	        if (entity.type === 'node') {
+	          if (renderAsVertex(entity, graph, wireframe, zoom)) {
+	            _currSelected[entity.id] = entity;
+	          }
+	        }
+	      });
+	    } else {
+	      _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
+	    } // note that drawVertices will add `_currSelected` automatically if needed..
 
-	        // We are not guaranteed to get an `accept` or `cancel` when blurring the field.
-	        // (This can happen if the user actives the combo, arrows down, and then clicks off to blur)
-	        // So compare the current field value against the suggestions one last time.
-	        function checkBrandOnBlur() {
-	            var latest = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-	            if (!latest) { return; }   // deleting the entity blurred the field?
 
-	            var preset = _mainPresetIndex.match(latest, context.graph());
-	            if (preset && preset.suggestion) { return; }   // already accepted
+	    var filter = function filter(d) {
+	      return d.id in _prevSelected;
+	    };
 
-	            // note: here we are testing against "decorated" names, i.e. 'Starbucks – Cafe'
-	            var name = utilGetSetValue(input).trim();
-	            var matched = allSuggestions.filter(function(s) { return name === s.name(); });
+	    drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
+	  }; // partial redraw - only update the hovered items..
 
-	            if (matched.length === 1) {
-	                acceptBrand({ suggestion: matched[0] });
-	            } else {
-	                cancelBrand();
-	            }
-	        }
 
+	  drawVertices.drawHover = function (selection, graph, target, extent) {
+	    if (target === _currHoverTarget) return; // continue only if something changed
 
-	        function acceptBrand(d) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    _prevHover = _currHover || {};
+	    _currHoverTarget = target;
+	    var entity = target && target.properties && target.properties.entity;
 
-	            var entity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+	    if (entity) {
+	      _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
+	    } else {
+	      _currHover = {};
+	    } // note that drawVertices will add `_currHover` automatically if needed..
 
-	            if (!d || !entity) {
-	                cancelBrand();
-	                return;
-	            }
 
-	            var tags = entity.tags;
-	            var geometry = entity.geometry(context.graph());
-	            var removed = preset.unsetTags(tags, geometry);
-	            for (var k in tags) {
-	                tags[k] = removed[k];  // set removed tags to `undefined`
-	            }
-	            tags = d.suggestion.setTags(tags, geometry);
-	            utilGetSetValue(input, tags.name);
-	            dispatch$1.call('change', this, tags);
-	        }
+	    var filter = function filter(d) {
+	      return d.id in _prevHover;
+	    };
 
+	    drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
+	  };
 
-	        // user hit escape, clean whatever preset name appears after the last ' – '
-	        function cancelBrand() {
-	            var name = utilGetSetValue(input);
-	            var clean = cleanName(name);
-	            if (clean !== name) {
-	                utilGetSetValue(input, clean);
-	                dispatch$1.call('change', this, { name: clean });
-	            }
-	        }
+	  return drawVertices;
+	}
 
-	        // Remove whatever is after the last ' – '
-	        // NOTE: split/join on en-dash, not a hypen (to avoid conflict with fr - nl names in Brussels etc)
-	        function cleanName(name) {
-	            var parts = name.split(' – ');
-	            if (parts.length > 1) {
-	                parts.pop();
-	                name = parts.join(' – ');
-	            }
-	            return name;
-	        }
-
-
-	        function fetchBrandNames(preset, suggestions) {
-	            var pTag = preset.id.split('/', 2);
-	            var pKey = pTag[0];
-	            var pValue = pTag[1];
-
-	            return function(value, callback) {
-	                var results = [];
-	                if (value && value.length > 2) {
-	                    for (var i = 0; i < suggestions.length; i++) {
-	                        var s = suggestions[i];
-
-	                        // don't suggest brands from incompatible countries
-	                        if (_countryCode && s.countryCodes &&
-	                            s.countryCodes.indexOf(_countryCode) === -1) { continue; }
-
-	                        var sTag = s.id.split('/', 2);
-	                        var sKey = sTag[0];
-	                        var sValue = sTag[1];
-	                        var name = s.name();
-	                        var dist = utilEditDistance(value, name.substring(0, value.length));
-	                        var matchesPreset = (pKey === sKey && (!pValue || pValue === sValue));
-
-	                        if (dist < 1 || (matchesPreset && dist < 3)) {
-	                            var obj = {
-	                                title: name,
-	                                value: name,
-	                                suggestion: s,
-	                                dist: dist + (matchesPreset ? 0 : 1)  // penalize if not matched preset
-	                            };
-	                            results.push(obj);
-	                        }
-	                    }
-	                    results.sort(function(a, b) { return a.dist - b.dist; });
-	                }
-	                results = results.slice(0, 10);
-	                callback(results);
-	            };
-	        }
+	function utilBindOnce(target, type, listener, capture) {
+	  var typeOnce = type + '.once';
 
+	  function one() {
+	    target.on(typeOnce, null);
+	    listener.apply(this, arguments);
+	  }
 
-	        function addNew() {
-	            event.preventDefault();
-	            if (field.locked()) { return; }
+	  target.on(typeOnce, one, capture);
+	  return this;
+	}
 
-	            var defaultLang = _mainLocalizer.languageCode().toLowerCase();
-	            var langExists = _multilingual.find(function(datum) { return datum.lang === defaultLang; });
-	            var isLangEn = defaultLang.indexOf('en') > -1;
-	            if (isLangEn || langExists) {
-	                defaultLang = '';
-	                langExists = _multilingual.find(function(datum) { return datum.lang === defaultLang; });
-	            }
+	function defaultFilter$2(d3_event) {
+	  return !d3_event.ctrlKey && !d3_event.button;
+	}
 
-	            if (!langExists) {
-	                // prepend the value so it appears at the top
-	                _multilingual.unshift({ lang: defaultLang, value: '' });
+	function defaultExtent$1() {
+	  var e = this;
 
-	                localizedInputs
-	                    .call(renderMultilingual);
-	            }
-	        }
+	  if (e instanceof SVGElement) {
+	    e = e.ownerSVGElement || e;
 
+	    if (e.hasAttribute('viewBox')) {
+	      e = e.viewBox.baseVal;
+	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+	    }
 
-	        function change(onInput) {
-	            return function() {
-	                if (field.locked()) {
-	                    event.preventDefault();
-	                    return;
-	                }
+	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+	  }
 
-	                var val = utilGetSetValue(select(this));
-	                if (!onInput) { val = context.cleanTagValue(val); }
+	  return [[0, 0], [e.clientWidth, e.clientHeight]];
+	}
 
-	                // don't override multiple values with blank string
-	                if (!val && Array.isArray(_tags[field.key])) { return; }
+	function defaultWheelDelta$1(d3_event) {
+	  return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
+	}
 
-	                var t = {};
+	function defaultConstrain$1(transform, extent, translateExtent) {
+	  var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+	      dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+	      dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+	      dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+	  return transform.translate(dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1));
+	}
 
-	                t[field.key] = val || undefined;
-	                dispatch$1.call('change', this, t, onInput);
-	            };
-	        }
-	    }
+	function utilZoomPan() {
+	  var filter = defaultFilter$2,
+	      extent = defaultExtent$1,
+	      constrain = defaultConstrain$1,
+	      wheelDelta = defaultWheelDelta$1,
+	      scaleExtent = [0, Infinity],
+	      translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+	      interpolate = interpolateZoom,
+	      dispatch$1 = dispatch('start', 'zoom', 'end'),
+	      _wheelDelay = 150,
+	      _transform = identity$2,
+	      _activeGesture;
 
+	  function zoom(selection) {
+	    selection.on('pointerdown.zoom', pointerdown).on('wheel.zoom', wheeled).style('touch-action', 'none').style('-webkit-tap-highlight-color', 'rgba(0,0,0,0)');
+	    select(window).on('pointermove.zoompan', pointermove).on('pointerup.zoompan pointercancel.zoompan', pointerup);
+	  }
+
+	  zoom.transform = function (collection, transform, point) {
+	    var selection = collection.selection ? collection.selection() : collection;
 
-	    function key(lang) {
-	        return field.key + ':' + lang;
+	    if (collection !== selection) {
+	      schedule(collection, transform, point);
+	    } else {
+	      selection.interrupt().each(function () {
+	        gesture(this, arguments).start(null).zoom(null, null, typeof transform === 'function' ? transform.apply(this, arguments) : transform).end(null);
+	      });
 	    }
+	  };
 
+	  zoom.scaleBy = function (selection, k, p) {
+	    zoom.scaleTo(selection, function () {
+	      var k0 = _transform.k,
+	          k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
+	      return k0 * k1;
+	    }, p);
+	  };
 
-	    function changeLang(d) {
-	        var tags = {};
+	  zoom.scaleTo = function (selection, k, p) {
+	    zoom.transform(selection, function () {
+	      var e = extent.apply(this, arguments),
+	          t0 = _transform,
+	          p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p,
+	          p1 = t0.invert(p0),
+	          k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
+	      return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
+	    }, p);
+	  };
 
-	        // make sure unrecognized suffixes are lowercase - #7156
-	        var lang = utilGetSetValue(select(this)).toLowerCase();
+	  zoom.translateBy = function (selection, x, y) {
+	    zoom.transform(selection, function () {
+	      return constrain(_transform.translate(typeof x === 'function' ? x.apply(this, arguments) : x, typeof y === 'function' ? y.apply(this, arguments) : y), extent.apply(this, arguments), translateExtent);
+	    });
+	  };
 
-	        var language = _languagesArray.find(function(d) {
-	            return d.label.toLowerCase() === lang ||
-	                (d.localName && d.localName.toLowerCase() === lang) ||
-	                (d.nativeName && d.nativeName.toLowerCase() === lang);
-	        });
-	        if (language) { lang = language.code; }
+	  zoom.translateTo = function (selection, x, y, p) {
+	    zoom.transform(selection, function () {
+	      var e = extent.apply(this, arguments),
+	          t = _transform,
+	          p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p;
+	      return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(typeof x === 'function' ? -x.apply(this, arguments) : -x, typeof y === 'function' ? -y.apply(this, arguments) : -y), e, translateExtent);
+	    }, p);
+	  };
 
-	        if (d.lang && d.lang !== lang) {
-	            tags[key(d.lang)] = undefined;
-	        }
+	  function scale(transform, k) {
+	    k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
+	    return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+	  }
 
-	        var newKey = lang && context.cleanTagKey(key(lang));
+	  function translate(transform, p0, p1) {
+	    var x = p0[0] - p1[0] * transform.k,
+	        y = p0[1] - p1[1] * transform.k;
+	    return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+	  }
 
-	        var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
+	  function centroid(extent) {
+	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+	  }
 
-	        if (newKey && value) {
-	            tags[newKey] = value;
-	        } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
-	            tags[newKey] = _wikiTitles[d.lang];
-	        }
+	  function schedule(transition, transform, point) {
+	    transition.on('start.zoom', function () {
+	      gesture(this, arguments).start(null);
+	    }).on('interrupt.zoom end.zoom', function () {
+	      gesture(this, arguments).end(null);
+	    }).tween('zoom', function () {
+	      var that = this,
+	          args = arguments,
+	          g = gesture(that, args),
+	          e = extent.apply(that, args),
+	          p = !point ? centroid(e) : typeof point === 'function' ? point.apply(that, args) : point,
+	          w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+	          a = _transform,
+	          b = typeof transform === 'function' ? transform.apply(that, args) : transform,
+	          i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+	      return function (t) {
+	        if (t === 1) t = b; // Avoid rounding error on end.
+	        else {
+	            var l = i(t),
+	                k = w / l[2];
+	            t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
+	          }
+	        g.zoom(null, null, t);
+	      };
+	    });
+	  }
 
-	        d.lang = lang;
-	        dispatch$1.call('change', this, tags);
-	    }
+	  function gesture(that, args, clean) {
+	    return !clean && _activeGesture || new Gesture(that, args);
+	  }
 
+	  function Gesture(that, args) {
+	    this.that = that;
+	    this.args = args;
+	    this.active = 0;
+	    this.extent = extent.apply(that, args);
+	  }
 
-	    function changeValue(d) {
-	        if (!d.lang) { return; }
-	        var value = context.cleanTagValue(utilGetSetValue(select(this))) || undefined;
+	  Gesture.prototype = {
+	    start: function start(d3_event) {
+	      if (++this.active === 1) {
+	        _activeGesture = this;
+	        dispatch$1.call('start', this, d3_event);
+	      }
 
-	        // don't override multiple values with blank string
-	        if (!value && Array.isArray(d.value)) { return; }
+	      return this;
+	    },
+	    zoom: function zoom(d3_event, key, transform) {
+	      if (this.mouse && key !== 'mouse') this.mouse[1] = transform.invert(this.mouse[0]);
+	      if (this.pointer0 && key !== 'touch') this.pointer0[1] = transform.invert(this.pointer0[0]);
+	      if (this.pointer1 && key !== 'touch') this.pointer1[1] = transform.invert(this.pointer1[0]);
+	      _transform = transform;
+	      dispatch$1.call('zoom', this, d3_event, key, transform);
+	      return this;
+	    },
+	    end: function end(d3_event) {
+	      if (--this.active === 0) {
+	        _activeGesture = null;
+	        dispatch$1.call('end', this, d3_event);
+	      }
 
-	        var t = {};
-	        t[key(d.lang)] = value;
-	        d.value = value;
-	        dispatch$1.call('change', this, t);
+	      return this;
 	    }
+	  };
 
+	  function wheeled(d3_event) {
+	    if (!filter.apply(this, arguments)) return;
+	    var g = gesture(this, arguments),
+	        t = _transform,
+	        k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
+	        p = utilFastMouse(this)(d3_event); // If the mouse is in the same location as before, reuse it.
+	    // If there were recent wheel events, reset the wheel idle timeout.
 
-	    function fetchLanguages(value, cb) {
-	        var v = value.toLowerCase();
-
-	        // show the user's language first
-	        var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
-
-	        if (_countryCode && _territoryLanguages[_countryCode]) {
-	            langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
-	        }
+	    if (g.wheel) {
+	      if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
+	        g.mouse[1] = t.invert(g.mouse[0] = p);
+	      }
 
-	        var langItems = [];
-	        langCodes.forEach(function(code) {
-	            var langItem = _languagesArray.find(function(item) {
-	                return item.code === code;
-	            });
-	            if (langItem) { langItems.push(langItem); }
-	        });
-	        langItems = utilArrayUniq(langItems.concat(_languagesArray));
-
-	        cb(langItems.filter(function(d) {
-	            return d.label.toLowerCase().indexOf(v) >= 0 ||
-	                (d.localName && d.localName.toLowerCase().indexOf(v) >= 0) ||
-	                (d.nativeName && d.nativeName.toLowerCase().indexOf(v) >= 0) ||
-	                d.code.toLowerCase().indexOf(v) >= 0;
-	        }).map(function(d) {
-	            return { value: d.label };
-	        }));
+	      clearTimeout(g.wheel); // Otherwise, capture the mouse point and location at the start.
+	    } else {
+	      g.mouse = [p, t.invert(p)];
+	      interrupt(this);
+	      g.start(d3_event);
 	    }
 
+	    d3_event.preventDefault();
+	    d3_event.stopImmediatePropagation();
+	    g.wheel = setTimeout(wheelidled, _wheelDelay);
+	    g.zoom(d3_event, 'mouse', constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
 
-	    function renderMultilingual(selection) {
-	        var entries = selection.selectAll('div.entry')
-	            .data(_multilingual, function(d) { return d.lang; });
-
-	        entries.exit()
-	            .style('top', '0')
-	            .style('max-height', '240px')
-	            .transition()
-	            .duration(200)
-	            .style('opacity', '0')
-	            .style('max-height', '0px')
-	            .remove();
+	    function wheelidled() {
+	      g.wheel = null;
+	      g.end(d3_event);
+	    }
+	  }
 
-	        var entriesEnter = entries.enter()
-	            .append('div')
-	            .attr('class', 'entry')
-	            .each(function(_, index) {
-	                var wrap = select(this);
-
-	                var domId = utilUniqueDomId(index);
-
-	                var label = wrap
-	                    .append('label')
-	                    .attr('class', 'field-label')
-	                    .attr('for', domId);
-
-	                var text = label
-	                    .append('span')
-	                    .attr('class', 'label-text');
-
-	                text
-	                    .append('span')
-	                    .attr('class', 'label-textvalue')
-	                    .text(_t('translate.localized_translation_label'));
-
-	                text
-	                    .append('span')
-	                    .attr('class', 'label-textannotation');
-
-	                label
-	                    .append('button')
-	                    .attr('class', 'remove-icon-multilingual')
-	                    .on('click', function(d, index) {
-	                        if (field.locked()) { return; }
-	                        event.preventDefault();
-
-	                        if (!d.lang || !d.value) {
-	                            _multilingual.splice(index, 1);
-	                            renderMultilingual(selection);
-	                        } else {
-	                            // remove from entity tags
-	                            var t = {};
-	                            t[key(d.lang)] = undefined;
-	                            dispatch$1.call('change', this, t);
-	                        }
-
-	                    })
-	                    .call(svgIcon('#iD-operation-delete'));
-
-	                wrap
-	                    .append('input')
-	                    .attr('class', 'localized-lang')
-	                    .attr('id', domId)
-	                    .attr('type', 'text')
-	                    .attr('placeholder', _t('translate.localized_translation_language'))
-	                    .on('blur', changeLang)
-	                    .on('change', changeLang)
-	                    .call(langCombo);
-
-	                wrap
-	                    .append('input')
-	                    .attr('type', 'text')
-	                    .attr('class', 'localized-value')
-	                    .on('blur', changeValue)
-	                    .on('change', changeValue);
-	            });
+	  var _downPointerIDs = new Set();
 
-	        entriesEnter
-	            .style('margin-top', '0px')
-	            .style('max-height', '0px')
-	            .style('opacity', '0')
-	            .transition()
-	            .duration(200)
-	            .style('margin-top', '10px')
-	            .style('max-height', '240px')
-	            .style('opacity', '1')
-	            .on('end', function() {
-	                select(this)
-	                    .style('max-height', '')
-	                    .style('overflow', 'visible');
-	            });
+	  var _pointerLocGetter;
 
-	        entries = entries.merge(entriesEnter);
+	  function pointerdown(d3_event) {
+	    _downPointerIDs.add(d3_event.pointerId);
 
-	        entries.order();
+	    if (!filter.apply(this, arguments)) return;
+	    var g = gesture(this, arguments, _downPointerIDs.size === 1);
+	    var started;
+	    d3_event.stopImmediatePropagation();
+	    _pointerLocGetter = utilFastMouse(this);
 
-	        entries.classed('present', function(d) {
-	            return d.lang && d.value;
-	        });
+	    var loc = _pointerLocGetter(d3_event);
 
-	        utilGetSetValue(entries.select('.localized-lang'), function(d) {
-	            return _mainLocalizer.languageName(d.lang);
-	        });
+	    var p = [loc, _transform.invert(loc), d3_event.pointerId];
 
-	        utilGetSetValue(entries.select('.localized-value'), function(d) {
-	                return typeof d.value === 'string' ? d.value : '';
-	            })
-	            .attr('title', function(d) {
-	                return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : null;
-	            })
-	            .attr('placeholder', function(d) {
-	                return Array.isArray(d.value) ? _t('inspector.multiple_values') : _t('translate.localized_translation_name');
-	            })
-	            .classed('mixed', function(d) {
-	                return Array.isArray(d.value);
-	            });
+	    if (!g.pointer0) {
+	      g.pointer0 = p;
+	      started = true;
+	    } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
+	      g.pointer1 = p;
 	    }
 
+	    if (started) {
+	      interrupt(this);
+	      g.start(d3_event);
+	    }
+	  }
 
-	    localized.tags = function(tags) {
-	        _tags = tags;
+	  function pointermove(d3_event) {
+	    if (!_downPointerIDs.has(d3_event.pointerId)) return;
+	    if (!_activeGesture || !_pointerLocGetter) return;
+	    var g = gesture(this, arguments);
+	    var isPointer0 = g.pointer0 && g.pointer0[2] === d3_event.pointerId;
+	    var isPointer1 = !isPointer0 && g.pointer1 && g.pointer1[2] === d3_event.pointerId;
 
-	        // Fetch translations from wikipedia
-	        if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
-	            _wikiTitles = {};
-	            var wm = tags.wikipedia.match(/([^:]+):(.+)/);
-	            if (wm && wm[0] && wm[1]) {
-	                wikipedia.translations(wm[1], wm[2], function(err, d) {
-	                    if (err || !d) { return; }
-	                    _wikiTitles = d;
-	                });
-	            }
-	        }
+	    if ((isPointer0 || isPointer1) && 'buttons' in d3_event && !d3_event.buttons) {
+	      // The pointer went up without ending the gesture somehow, e.g.
+	      // a down mouse was moved off the map and released. End it here.
+	      if (g.pointer0) _downPointerIDs["delete"](g.pointer0[2]);
+	      if (g.pointer1) _downPointerIDs["delete"](g.pointer1[2]);
+	      g.end(d3_event);
+	      return;
+	    }
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	    d3_event.preventDefault();
+	    d3_event.stopImmediatePropagation();
 
-	        utilGetSetValue(input, typeof tags[field.key] === 'string' ? tags[field.key] : '')
-	            .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder())
-	            .classed('mixed', isMixed);
+	    var loc = _pointerLocGetter(d3_event);
 
-	        calcMultilingual(tags);
+	    var t, p, l;
+	    if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
+	    t = _transform;
 
-	        _selection
-	            .call(localized);
-	    };
+	    if (g.pointer1) {
+	      var p0 = g.pointer0[0],
+	          l0 = g.pointer0[1],
+	          p1 = g.pointer1[0],
+	          l1 = g.pointer1[1],
+	          dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
+	          dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
+	      t = scale(t, Math.sqrt(dp / dl));
+	      p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
+	      l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
+	    } else if (g.pointer0) {
+	      p = g.pointer0[0];
+	      l = g.pointer0[1];
+	    } else return;
 
+	    g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
+	  }
 
-	    localized.focus = function() {
-	        input.node().focus();
-	    };
+	  function pointerup(d3_event) {
+	    if (!_downPointerIDs.has(d3_event.pointerId)) return;
 
+	    _downPointerIDs["delete"](d3_event.pointerId);
 
-	    localized.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        _multilingual = [];
-	        loadCountryCode();
-	        return localized;
-	    };
+	    if (!_activeGesture) return;
+	    var g = gesture(this, arguments);
+	    d3_event.stopImmediatePropagation();
+	    if (g.pointer0 && g.pointer0[2] === d3_event.pointerId) delete g.pointer0;else if (g.pointer1 && g.pointer1[2] === d3_event.pointerId) delete g.pointer1;
 
-	    function loadCountryCode() {
-	        var extent = combinedEntityExtent();
-	        var countryCode = extent && iso1A2Code(extent.center());
-	        _countryCode = countryCode && countryCode.toLowerCase();
+	    if (g.pointer1 && !g.pointer0) {
+	      g.pointer0 = g.pointer1;
+	      delete g.pointer1;
 	    }
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	    if (g.pointer0) g.pointer0[1] = _transform.invert(g.pointer0[0]);else {
+	      g.end(d3_event);
 	    }
+	  }
 
-	    return utilRebind(localized, dispatch$1, 'on');
-	}
+	  zoom.wheelDelta = function (_) {
+	    return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
+	  };
 
-	function uiFieldMaxspeed(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var unitInput = select(null);
-	    var input = select(null);
-	    var _entityIDs = [];
-	    var _tags;
-	    var _isImperial;
+	  zoom.filter = function (_) {
+	    return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
+	  };
 
-	    var speedCombo = uiCombobox(context, 'maxspeed');
-	    var unitCombo = uiCombobox(context, 'maxspeed-unit')
-	            .data(['km/h', 'mph'].map(comboValues));
+	  zoom.extent = function (_) {
+	    return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+	  };
 
-	    var metricValues = [20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120];
-	    var imperialValues = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80];
+	  zoom.scaleExtent = function (_) {
+	    return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+	  };
 
+	  zoom.translateExtent = function (_) {
+	    return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+	  };
 
-	    function maxspeed(selection) {
+	  zoom.constrain = function (_) {
+	    return arguments.length ? (constrain = _, zoom) : constrain;
+	  };
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  zoom.interpolate = function (_) {
+	    return arguments.length ? (interpolate = _, zoom) : interpolate;
+	  };
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  zoom._transform = function (_) {
+	    return arguments.length ? (_transform = _, zoom) : _transform;
+	  };
 
+	  return utilRebind(zoom, dispatch$1, 'on');
+	}
 
-	        input = wrap.selectAll('input.maxspeed-number')
-	            .data([0]);
+	// if pointer events are supported. Falls back to default `dblclick` event.
 
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', 'maxspeed-number')
-	            .attr('id', field.domId)
-	            .call(utilNoAuto)
-	            .call(speedCombo)
-	            .merge(input);
+	function utilDoubleUp() {
+	  var dispatch$1 = dispatch('doubleUp');
+	  var _maxTimespan = 500; // milliseconds
 
-	        input
-	            .on('change', change)
-	            .on('blur', change);
+	  var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
 
-	        var loc = combinedEntityExtent().center();
-	        _isImperial = roadSpeedUnit(loc) === 'mph';
+	  var _pointer; // object representing the pointer that could trigger double up
 
-	        unitInput = wrap.selectAll('input.maxspeed-unit')
-	            .data([0]);
 
-	        unitInput = unitInput.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', 'maxspeed-unit')
-	            .call(unitCombo)
-	            .merge(unitInput);
+	  function pointerIsValidFor(loc) {
+	    // second pointerup must occur within a small timeframe after the first pointerdown
+	    return new Date().getTime() - _pointer.startTime <= _maxTimespan && // all pointer events must occur within a small distance of the first pointerdown
+	    geoVecLength(_pointer.startLoc, loc) <= _maxDistance;
+	  }
 
-	        unitInput
-	            .on('blur', changeUnits)
-	            .on('change', changeUnits);
+	  function pointerdown(d3_event) {
+	    // ignore right-click
+	    if (d3_event.ctrlKey || d3_event.button === 2) return;
+	    var loc = [d3_event.clientX, d3_event.clientY]; // Don't rely on pointerId here since it can change between pointerdown
+	    // events on touch devices
 
+	    if (_pointer && !pointerIsValidFor(loc)) {
+	      // if this pointer is no longer valid, clear it so another can be started
+	      _pointer = undefined;
+	    }
 
-	        function changeUnits() {
-	            _isImperial = utilGetSetValue(unitInput) === 'mph';
-	            utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-	            setUnitSuggestions();
-	            change();
-	        }
+	    if (!_pointer) {
+	      _pointer = {
+	        startLoc: loc,
+	        startTime: new Date().getTime(),
+	        upCount: 0,
+	        pointerId: d3_event.pointerId
+	      };
+	    } else {
+	      // double down
+	      _pointer.pointerId = d3_event.pointerId;
 	    }
+	  }
 
+	  function pointerup(d3_event) {
+	    // ignore right-click
+	    if (d3_event.ctrlKey || d3_event.button === 2) return;
+	    if (!_pointer || _pointer.pointerId !== d3_event.pointerId) return;
+	    _pointer.upCount += 1;
 
-	    function setUnitSuggestions() {
-	        speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
-	        utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-	    }
+	    if (_pointer.upCount === 2) {
+	      // double up!
+	      var loc = [d3_event.clientX, d3_event.clientY];
 
+	      if (pointerIsValidFor(loc)) {
+	        var locInThis = utilFastMouse(this)(d3_event);
+	        dispatch$1.call('doubleUp', this, d3_event, locInThis);
+	      } // clear the pointer info in any case
 
-	    function comboValues(d) {
-	        return {
-	            value: d.toString(),
-	            title: d.toString()
-	        };
+
+	      _pointer = undefined;
 	    }
+	  }
 
+	  function doubleUp(selection) {
+	    if ('PointerEvent' in window) {
+	      // dblclick isn't well supported on touch devices so manually use
+	      // pointer events if they're available
+	      selection.on('pointerdown.doubleUp', pointerdown).on('pointerup.doubleUp', pointerup);
+	    } else {
+	      // fallback to dblclick
+	      selection.on('dblclick.doubleUp', function (d3_event) {
+	        dispatch$1.call('doubleUp', this, d3_event, utilFastMouse(this)(d3_event));
+	      });
+	    }
+	  }
 
-	    function change() {
-	        var tag = {};
-	        var value = utilGetSetValue(input).trim();
+	  doubleUp.off = function (selection) {
+	    selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
+	  };
 
-	        // don't override multiple values with blank string
-	        if (!value && Array.isArray(_tags[field.key])) { return; }
+	  return utilRebind(doubleUp, dispatch$1, 'on');
+	}
 
-	        if (!value) {
-	            tag[field.key] = undefined;
-	        } else if (isNaN(value) || !_isImperial) {
-	            tag[field.key] = context.cleanTagValue(value);
-	        } else {
-	            tag[field.key] = context.cleanTagValue(value + ' mph');
-	        }
+	var TILESIZE = 256;
+	var minZoom = 2;
+	var maxZoom = 24;
+	var kMin = geoZoomToScale(minZoom, TILESIZE);
+	var kMax = geoZoomToScale(maxZoom, TILESIZE);
 
-	        dispatch$1.call('change', this, tag);
-	    }
+	function clamp(num, min, max) {
+	  return Math.max(min, Math.min(num, max));
+	}
 
+	function rendererMap(context) {
+	  var dispatch$1 = dispatch('move', 'drawn', 'crossEditableZoom', 'hitMinZoom', 'changeHighlighting', 'changeAreaFill');
+	  var projection = context.projection;
+	  var curtainProjection = context.curtainProjection;
+	  var drawLayers;
+	  var drawPoints;
+	  var drawVertices;
+	  var drawLines;
+	  var drawAreas;
+	  var drawMidpoints;
+	  var drawLabels;
 
-	    maxspeed.tags = function(tags) {
-	        _tags = tags;
+	  var _selection = select(null);
 
-	        var value = tags[field.key];
-	        var isMixed = Array.isArray(value);
+	  var supersurface = select(null);
+	  var wrapper = select(null);
+	  var surface = select(null);
+	  var _dimensions = [1, 1];
+	  var _dblClickZoomEnabled = true;
+	  var _redrawEnabled = true;
 
-	        if (!isMixed) {
-	            if (value && value.indexOf('mph') >= 0) {
-	                value = parseInt(value, 10).toString();
-	                _isImperial = true;
-	            } else if (value) {
-	                _isImperial = false;
-	            }
-	        }
+	  var _gestureTransformStart;
 
-	        setUnitSuggestions();
+	  var _transformStart = projection.transform();
 
-	        utilGetSetValue(input, typeof value === 'string' ? value : '')
-	            .attr('title', isMixed ? value.filter(Boolean).join('\n') : null)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder())
-	            .classed('mixed', isMixed);
-	    };
+	  var _transformLast;
 
+	  var _isTransformed = false;
+	  var _minzoom = 0;
 
-	    maxspeed.focus = function() {
-	        input.node().focus();
-	    };
+	  var _getMouseCoords;
 
+	  var _lastPointerEvent;
 
-	    maxspeed.entityIDs = function(val) {
-	        _entityIDs = val;
-	    };
+	  var _lastWithinEditableZoom; // whether a pointerdown event started the zoom
 
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	    }
+	  var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events
 
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
 
-	    return utilRebind(maxspeed, dispatch$1, 'on');
-	}
 
-	function uiFieldRadio(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var placeholder = select(null);
-	    var wrap = select(null);
-	    var labels = select(null);
-	    var radios = select(null);
-	    var radioData = (field.options || (field.strings && field.strings.options && Object.keys(field.strings.options)) || field.keys).slice();  // shallow copy
-	    var typeField;
-	    var layerField;
-	    var _oldType = {};
-	    var _entityIDs = [];
+	  var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
 
+	  var _zoomerPanner = _zoomerPannerFunction().scaleExtent([kMin, kMax]).interpolate(interpolate).filter(zoomEventFilter).on('zoom.map', zoomPan).on('start.map', function (d3_event) {
+	    _pointerDown = d3_event && (d3_event.type === 'pointerdown' || d3_event.sourceEvent && d3_event.sourceEvent.type === 'pointerdown');
+	  }).on('end.map', function () {
+	    _pointerDown = false;
+	  });
 
-	    function selectedKey() {
-	        var node = wrap.selectAll('.form-field-input-radio label.active input');
-	        return !node.empty() && node.datum();
-	    }
+	  var _doubleUpHandler = utilDoubleUp();
+
+	  var scheduleRedraw = throttle(redraw, 750); // var isRedrawScheduled = false;
+	  // var pendingRedrawCall;
+	  // function scheduleRedraw() {
+	  //     // Only schedule the redraw if one has not already been set.
+	  //     if (isRedrawScheduled) return;
+	  //     isRedrawScheduled = true;
+	  //     var that = this;
+	  //     var args = arguments;
+	  //     pendingRedrawCall = window.requestIdleCallback(function () {
+	  //         // Reset the boolean so future redraws can be set.
+	  //         isRedrawScheduled = false;
+	  //         redraw.apply(that, args);
+	  //     }, { timeout: 1400 });
+	  // }
 
 
-	    function radio(selection) {
-	        selection.classed('preset-radio', true);
+	  function cancelPendingRedraw() {
+	    scheduleRedraw.cancel(); // isRedrawScheduled = false;
+	    // window.cancelIdleCallback(pendingRedrawCall);
+	  }
 
-	        wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  function map(selection) {
+	    _selection = selection;
+	    context.on('change.map', immediateRedraw);
+	    var osm = context.connection();
 
-	        var enter = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-radio');
+	    if (osm) {
+	      osm.on('change.map', immediateRedraw);
+	    }
 
-	        enter
-	            .append('span')
-	            .attr('class', 'placeholder');
+	    function didUndoOrRedo(targetTransform) {
+	      var mode = context.mode().id;
+	      if (mode !== 'browse' && mode !== 'select') return;
 
-	        wrap = wrap
-	            .merge(enter);
+	      if (targetTransform) {
+	        map.transformEase(targetTransform);
+	      }
+	    }
 
+	    context.history().on('merge.map', function () {
+	      scheduleRedraw();
+	    }).on('change.map', immediateRedraw).on('undone.map', function (stack, fromStack) {
+	      didUndoOrRedo(fromStack.transform);
+	    }).on('redone.map', function (stack) {
+	      didUndoOrRedo(stack.transform);
+	    });
+	    context.background().on('change.map', immediateRedraw);
+	    context.features().on('redraw.map', immediateRedraw);
+	    drawLayers.on('change.map', function () {
+	      context.background().updateImagery();
+	      immediateRedraw();
+	    });
+	    selection.on('wheel.map mousewheel.map', function (d3_event) {
+	      // disable swipe-to-navigate browser pages on trackpad/magic mouse – #5552
+	      d3_event.preventDefault();
+	    }).call(_zoomerPanner).call(_zoomerPanner.transform, projection.transform()).on('dblclick.zoom', null); // override d3-zoom dblclick handling
 
-	        placeholder = wrap.selectAll('.placeholder');
+	    map.supersurface = supersurface = selection.append('div').attr('class', 'supersurface').call(utilSetTransform, 0, 0); // Need a wrapper div because Opera can't cope with an absolutely positioned
+	    // SVG element: http://bl.ocks.org/jfirebaugh/6fbfbd922552bf776c16
 
-	        labels = wrap.selectAll('label')
-	            .data(radioData);
+	    wrapper = supersurface.append('div').attr('class', 'layer layer-data');
+	    map.surface = surface = wrapper.call(drawLayers).selectAll('.surface');
+	    surface.call(drawLabels.observe).call(_doubleUpHandler).on(_pointerPrefix + 'down.zoom', function (d3_event) {
+	      _lastPointerEvent = d3_event;
 
-	        enter = labels.enter()
-	            .append('label');
+	      if (d3_event.button === 2) {
+	        d3_event.stopPropagation();
+	      }
+	    }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
+	      _lastPointerEvent = d3_event;
 
-	        enter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', field.id)
-	            .attr('value', function(d) { return field.t('options.' + d, { 'default': d }); })
-	            .attr('checked', false);
+	      if (resetTransform()) {
+	        immediateRedraw();
+	      }
+	    }).on(_pointerPrefix + 'move.map', function (d3_event) {
+	      _lastPointerEvent = d3_event;
+	    }).on(_pointerPrefix + 'over.vertices', function (d3_event) {
+	      if (map.editableDataEnabled() && !_isTransformed) {
+	        var hover = d3_event.target.__data__;
+	        surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
+	        dispatch$1.call('drawn', this, {
+	          full: false
+	        });
+	      }
+	    }).on(_pointerPrefix + 'out.vertices', function (d3_event) {
+	      if (map.editableDataEnabled() && !_isTransformed) {
+	        var hover = d3_event.relatedTarget && d3_event.relatedTarget.__data__;
+	        surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
+	        dispatch$1.call('drawn', this, {
+	          full: false
+	        });
+	      }
+	    });
+	    var detected = utilDetect(); // only WebKit supports gesture events
+
+	    if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
+	    // but we only need to do this on desktop Safari anyway. – #7694
+	    !detected.isMobileWebKit) {
+	      // Desktop Safari sends gesture events for multitouch trackpad pinches.
+	      // We can listen for these and translate them into map zooms.
+	      surface.on('gesturestart.surface', function (d3_event) {
+	        d3_event.preventDefault();
+	        _gestureTransformStart = projection.transform();
+	      }).on('gesturechange.surface', gestureChange);
+	    } // must call after surface init
+
+
+	    updateAreaFill();
+
+	    _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
+	      if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself
+
+	      if (_typeof(d3_event.target.__data__) === 'object' && // or area fills
+	      !select(d3_event.target).classed('fill')) return;
+	      var zoomOut = d3_event.shiftKey;
+	      var t = projection.transform();
+	      var p1 = t.invert(p0);
+	      t = t.scale(zoomOut ? 0.5 : 2);
+	      t.x = p0[0] - p1[0] * t.k;
+	      t.y = p0[1] - p1[1] * t.k;
+	      map.transformEase(t);
+	    });
 
-	        enter
-	            .append('span')
-	            .text(function(d) { return field.t('options.' + d, { 'default': d }); });
+	    context.on('enter.map', function () {
+	      if (!map.editableDataEnabled(true
+	      /* skip zoom check */
+	      )) return; // redraw immediately any objects affected by a change in selectedIDs.
 
-	        labels = labels
-	            .merge(enter);
+	      var graph = context.graph();
+	      var selectedAndParents = {};
+	      context.selectedIDs().forEach(function (id) {
+	        var entity = graph.hasEntity(id);
 
-	        radios = labels.selectAll('input')
-	            .on('change', changeRadio);
+	        if (entity) {
+	          selectedAndParents[entity.id] = entity;
 
-	    }
+	          if (entity.type === 'node') {
+	            graph.parentWays(entity).forEach(function (parent) {
+	              selectedAndParents[parent.id] = parent;
+	            });
+	          }
+	        }
+	      });
+	      var data = Object.values(selectedAndParents);
 
+	      var filter = function filter(d) {
+	        return d.id in selectedAndParents;
+	      };
 
-	    function structureExtras(selection, tags) {
-	        var selected = selectedKey() || tags.layer !== undefined;
-	        var type = _mainPresetIndex.field(selected);
-	        var layer = _mainPresetIndex.field('layer');
-	        var showLayer = (selected === 'bridge' || selected === 'tunnel' || tags.layer !== undefined);
+	      data = context.features().filter(data, graph);
+	      surface.call(drawVertices.drawSelected, graph, map.extent()).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent());
+	      dispatch$1.call('drawn', this, {
+	        full: false
+	      }); // redraw everything else later
 
+	      scheduleRedraw();
+	    });
+	    map.dimensions(utilGetDimensions(selection));
+	  }
 
-	        var extrasWrap = selection.selectAll('.structure-extras-wrap')
-	            .data(selected ? [0] : []);
+	  function zoomEventFilter(d3_event) {
+	    // Fix for #2151, (see also d3/d3-zoom#60, d3/d3-brush#18)
+	    // Intercept `mousedown` and check if there is an orphaned zoom gesture.
+	    // This can happen if a previous `mousedown` occurred without a `mouseup`.
+	    // If we detect this, dispatch `mouseup` to complete the orphaned gesture,
+	    // so that d3-zoom won't stop propagation of new `mousedown` events.
+	    if (d3_event.type === 'mousedown') {
+	      var hasOrphan = false;
+	      var listeners = window.__on;
 
-	        extrasWrap.exit()
-	            .remove();
+	      for (var i = 0; i < listeners.length; i++) {
+	        var listener = listeners[i];
 
-	        extrasWrap = extrasWrap.enter()
-	            .append('div')
-	            .attr('class', 'structure-extras-wrap')
-	            .merge(extrasWrap);
+	        if (listener.name === 'zoom' && listener.type === 'mouseup') {
+	          hasOrphan = true;
+	          break;
+	        }
+	      }
 
-	        var list = extrasWrap.selectAll('ul')
-	            .data([0]);
+	      if (hasOrphan) {
+	        var event = window.CustomEvent;
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(list);
+	        if (event) {
+	          event = new event('mouseup');
+	        } else {
+	          event = window.document.createEvent('Event');
+	          event.initEvent('mouseup', false, false);
+	        } // Event needs to be dispatched with an event.view property.
 
 
-	        // Type
-	        if (type) {
-	            if (!typeField || typeField.id !== selected) {
-	                typeField = uiField(context, type, _entityIDs, { wrap: false })
-	                    .on('change', changeType);
-	            }
-	            typeField.tags(tags);
-	        } else {
-	            typeField = null;
-	        }
+	        event.view = window;
+	        window.dispatchEvent(event);
+	      }
+	    }
 
-	        var typeItem = list.selectAll('.structure-type-item')
-	            .data(typeField ? [typeField] : [], function(d) { return d.id; });
+	    return d3_event.button !== 2; // ignore right clicks
+	  }
 
-	        // Exit
-	        typeItem.exit()
-	            .remove();
+	  function pxCenter() {
+	    return [_dimensions[0] / 2, _dimensions[1] / 2];
+	  }
 
-	        // Enter
-	        var typeEnter = typeItem.enter()
-	            .insert('li', ':first-child')
-	            .attr('class', 'labeled-input structure-type-item');
+	  function drawEditable(difference, extent) {
+	    var mode = context.mode();
+	    var graph = context.graph();
+	    var features = context.features();
+	    var all = context.history().intersects(map.extent());
+	    var fullRedraw = false;
+	    var data;
+	    var set;
+	    var filter;
+	    var applyFeatureLayerFilters = true;
+
+	    if (map.isInWideSelection()) {
+	      data = [];
+	      utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function (id) {
+	        var entity = context.hasEntity(id);
+	        if (entity) data.push(entity);
+	      });
+	      fullRedraw = true;
+	      filter = utilFunctor(true); // selected features should always be visible, so we can skip filtering
 
-	        typeEnter
-	            .append('span')
-	            .attr('class', 'label structure-label-type')
-	            .attr('for', 'preset-input-' + selected)
-	            .text(_t('inspector.radio.structure.type'));
+	      applyFeatureLayerFilters = false;
+	    } else if (difference) {
+	      var complete = difference.complete(map.extent());
+	      data = Object.values(complete).filter(Boolean);
+	      set = new Set(Object.keys(complete));
 
-	        typeEnter
-	            .append('div')
-	            .attr('class', 'structure-input-type-wrap');
+	      filter = function filter(d) {
+	        return set.has(d.id);
+	      };
 
-	        // Update
-	        typeItem = typeItem
-	            .merge(typeEnter);
+	      features.clear(data);
+	    } else {
+	      // force a full redraw if gatherStats detects that a feature
+	      // should be auto-hidden (e.g. points or buildings)..
+	      if (features.gatherStats(all, graph, _dimensions)) {
+	        extent = undefined;
+	      }
 
-	        if (typeField) {
-	            typeItem.selectAll('.structure-input-type-wrap')
-	                .call(typeField.render);
-	        }
+	      if (extent) {
+	        data = context.history().intersects(map.extent().intersection(extent));
+	        set = new Set(data.map(function (entity) {
+	          return entity.id;
+	        }));
 
+	        filter = function filter(d) {
+	          return set.has(d.id);
+	        };
+	      } else {
+	        data = all;
+	        fullRedraw = true;
+	        filter = utilFunctor(true);
+	      }
+	    }
 
-	        // Layer
-	        if (layer && showLayer) {
-	            if (!layerField) {
-	                layerField = uiField(context, layer, _entityIDs, { wrap: false })
-	                    .on('change', changeLayer);
-	            }
-	            layerField.tags(tags);
-	            field.keys = utilArrayUnion(field.keys, ['layer']);
-	        } else {
-	            layerField = null;
-	            field.keys = field.keys.filter(function(k) { return k !== 'layer'; });
-	        }
+	    if (applyFeatureLayerFilters) {
+	      data = features.filter(data, graph);
+	    } else {
+	      context.features().resetStats();
+	    }
 
-	        var layerItem = list.selectAll('.structure-layer-item')
-	            .data(layerField ? [layerField] : []);
+	    if (mode && mode.id === 'select') {
+	      // update selected vertices - the user might have just double-clicked a way,
+	      // creating a new vertex, triggering a partial redraw without a mode change
+	      surface.call(drawVertices.drawSelected, graph, map.extent());
+	    }
 
-	        // Exit
-	        layerItem.exit()
-	            .remove();
+	    surface.call(drawVertices, graph, data, filter, map.extent(), fullRedraw).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent()).call(drawLabels, graph, data, filter, _dimensions, fullRedraw).call(drawPoints, graph, data, filter);
+	    dispatch$1.call('drawn', this, {
+	      full: true
+	    });
+	  }
 
-	        // Enter
-	        var layerEnter = layerItem.enter()
-	            .append('li')
-	            .attr('class', 'labeled-input structure-layer-item');
+	  map.init = function () {
+	    drawLayers = svgLayers(projection, context);
+	    drawPoints = svgPoints(projection, context);
+	    drawVertices = svgVertices(projection, context);
+	    drawLines = svgLines(projection, context);
+	    drawAreas = svgAreas(projection, context);
+	    drawMidpoints = svgMidpoints(projection, context);
+	    drawLabels = svgLabels(projection, context);
+	  };
 
-	        layerEnter
-	            .append('span')
-	            .attr('class', 'label structure-label-layer')
-	            .attr('for', 'preset-input-layer')
-	            .text(_t('inspector.radio.structure.layer'));
+	  function editOff() {
+	    context.features().resetStats();
+	    surface.selectAll('.layer-osm *').remove();
+	    surface.selectAll('.layer-touch:not(.markers) *').remove();
+	    var allowed = {
+	      'browse': true,
+	      'save': true,
+	      'select-note': true,
+	      'select-data': true,
+	      'select-error': true
+	    };
+	    var mode = context.mode();
 
-	        layerEnter
-	            .append('div')
-	            .attr('class', 'structure-input-layer-wrap');
+	    if (mode && !allowed[mode.id]) {
+	      context.enter(modeBrowse(context));
+	    }
 
-	        // Update
-	        layerItem = layerItem
-	            .merge(layerEnter);
+	    dispatch$1.call('drawn', this, {
+	      full: true
+	    });
+	  }
 
-	        if (layerField) {
-	            layerItem.selectAll('.structure-input-layer-wrap')
-	                .call(layerField.render);
+	  function gestureChange(d3_event) {
+	    // Remap Safari gesture events to wheel events - #5492
+	    // We want these disabled most places, but enabled for zoom/unzoom on map surface
+	    // https://developer.mozilla.org/en-US/docs/Web/API/GestureEvent
+	    var e = d3_event;
+	    e.preventDefault();
+	    var props = {
+	      deltaMode: 0,
+	      // dummy values to ignore in zoomPan
+	      deltaY: 1,
+	      // dummy values to ignore in zoomPan
+	      clientX: e.clientX,
+	      clientY: e.clientY,
+	      screenX: e.screenX,
+	      screenY: e.screenY,
+	      x: e.x,
+	      y: e.y
+	    };
+	    var e2 = new WheelEvent('wheel', props);
+	    e2._scale = e.scale; // preserve the original scale
+
+	    e2._rotation = e.rotation; // preserve the original rotation
+
+	    _selection.node().dispatchEvent(e2);
+	  }
+
+	  function zoomPan(event, key, transform) {
+	    var source = event && event.sourceEvent || event;
+	    var eventTransform = transform || event && event.transform;
+	    var x = eventTransform.x;
+	    var y = eventTransform.y;
+	    var k = eventTransform.k; // Special handling of 'wheel' events:
+	    // They might be triggered by the user scrolling the mouse wheel,
+	    // or 2-finger pinch/zoom gestures, the transform may need adjustment.
+
+	    if (source && source.type === 'wheel') {
+	      // assume that the gesture is already handled by pointer events
+	      if (_pointerDown) return;
+	      var detected = utilDetect();
+	      var dX = source.deltaX;
+	      var dY = source.deltaY;
+	      var x2 = x;
+	      var y2 = y;
+	      var k2 = k;
+	      var t0, p0, p1; // Normalize mousewheel scroll speed (Firefox) - #3029
+	      // If wheel delta is provided in LINE units, recalculate it in PIXEL units
+	      // We are essentially redoing the calculations that occur here:
+	      //   https://github.com/d3/d3-zoom/blob/78563a8348aa4133b07cac92e2595c2227ca7cd7/src/zoom.js#L203
+	      // See this for more info:
+	      //   https://github.com/basilfx/normalize-wheel/blob/master/src/normalizeWheel.js
+
+	      if (source.deltaMode === 1
+	      /* LINE */
+	      ) {
+	          // Convert from lines to pixels, more if the user is scrolling fast.
+	          // (I made up the exp function to roughly match Firefox to what Chrome does)
+	          // These numbers should be floats, because integers are treated as pan gesture below.
+	          var lines = Math.abs(source.deltaY);
+	          var sign = source.deltaY > 0 ? 1 : -1;
+	          dY = sign * clamp(Math.exp((lines - 1) * 0.75) * 4.000244140625, 4.000244140625, // min
+	          350.000244140625 // max
+	          ); // On Firefox Windows and Linux we always get +/- the scroll line amount (default 3)
+	          // There doesn't seem to be any scroll acceleration.
+	          // This multiplier increases the speed a little bit - #5512
+
+	          if (detected.os !== 'mac') {
+	            dY *= 5;
+	          } // recalculate x2,y2,k2
+
+
+	          t0 = _isTransformed ? _transformLast : _transformStart;
+	          p0 = _getMouseCoords(source);
+	          p1 = t0.invert(p0);
+	          k2 = t0.k * Math.pow(2, -dY / 500);
+	          k2 = clamp(k2, kMin, kMax);
+	          x2 = p0[0] - p1[0] * k2;
+	          y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (Safari) - #5492
+	          // These are fake `wheel` events we made from Safari `gesturechange` events..
+	        } else if (source._scale) {
+	        // recalculate x2,y2,k2
+	        t0 = _gestureTransformStart;
+	        p0 = _getMouseCoords(source);
+	        p1 = t0.invert(p0);
+	        k2 = t0.k * source._scale;
+	        k2 = clamp(k2, kMin, kMax);
+	        x2 = p0[0] - p1[0] * k2;
+	        y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (all browsers except Safari) - #5492
+	        // Pinch zooming via the `wheel` event will always have:
+	        // - `ctrlKey = true`
+	        // - `deltaY` is not round integer pixels (ignore `deltaX`)
+	      } else if (source.ctrlKey && !isInteger(dY)) {
+	        dY *= 6; // slightly scale up whatever the browser gave us
+	        // recalculate x2,y2,k2
+
+	        t0 = _isTransformed ? _transformLast : _transformStart;
+	        p0 = _getMouseCoords(source);
+	        p1 = t0.invert(p0);
+	        k2 = t0.k * Math.pow(2, -dY / 500);
+	        k2 = clamp(k2, kMin, kMax);
+	        x2 = p0[0] - p1[0] * k2;
+	        y2 = p0[1] - p1[1] * k2; // Trackpad scroll zooming with shift or alt/option key down
+	      } else if ((source.altKey || source.shiftKey) && isInteger(dY)) {
+	        // recalculate x2,y2,k2
+	        t0 = _isTransformed ? _transformLast : _transformStart;
+	        p0 = _getMouseCoords(source);
+	        p1 = t0.invert(p0);
+	        k2 = t0.k * Math.pow(2, -dY / 500);
+	        k2 = clamp(k2, kMin, kMax);
+	        x2 = p0[0] - p1[0] * k2;
+	        y2 = p0[1] - p1[1] * k2; // 2 finger map panning (Mac only, all browsers) - #5492, #5512
+	        // Panning via the `wheel` event will always have:
+	        // - `ctrlKey = false`
+	        // - `deltaX`,`deltaY` are round integer pixels
+	      } else if (detected.os === 'mac' && !source.ctrlKey && isInteger(dX) && isInteger(dY)) {
+	        p1 = projection.translate();
+	        x2 = p1[0] - dX;
+	        y2 = p1[1] - dY;
+	        k2 = projection.scale();
+	        k2 = clamp(k2, kMin, kMax);
+	      } // something changed - replace the event transform
+
+
+	      if (x2 !== x || y2 !== y || k2 !== k) {
+	        x = x2;
+	        y = y2;
+	        k = k2;
+	        eventTransform = identity$2.translate(x2, y2).scale(k2);
+
+	        if (_zoomerPanner._transform) {
+	          // utilZoomPan interface
+	          _zoomerPanner._transform(eventTransform);
+	        } else {
+	          // d3_zoom interface
+	          _selection.node().__zoom = eventTransform;
 	        }
+	      }
 	    }
 
+	    if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
+	      return; // no change
+	    }
 
-	    function changeType(t, onInput) {
-	        var key = selectedKey();
-	        if (!key) { return; }
-
-	        var val = t[key];
-	        if (val !== 'no') {
-	            _oldType[key] = val;
-	        }
+	    var withinEditableZoom = map.withinEditableZoom();
 
-	        if (field.type === 'structureRadio') {
-	            // remove layer if it should not be set
-	            if (val === 'no' ||
-	                (key !== 'bridge' && key !== 'tunnel') ||
-	                (key === 'tunnel' && val === 'building_passage')) {
-	                t.layer = undefined;
-	            }
-	            // add layer if it should be set
-	            if (t.layer === undefined) {
-	                if (key === 'bridge' && val !== 'no') {
-	                    t.layer = '1';
-	                }
-	                if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
-	                    t.layer = '-1';
-	                }
-	            }
-	         }
+	    if (_lastWithinEditableZoom !== withinEditableZoom) {
+	      if (_lastWithinEditableZoom !== undefined) {
+	        // notify that the map zoomed in or out over the editable zoom threshold
+	        dispatch$1.call('crossEditableZoom', this, withinEditableZoom);
+	      }
 
-	        dispatch$1.call('change', this, t, onInput);
+	      _lastWithinEditableZoom = withinEditableZoom;
 	    }
 
-
-	    function changeLayer(t, onInput) {
-	        if (t.layer === '0') {
-	            t.layer = undefined;
-	        }
-	        dispatch$1.call('change', this, t, onInput);
+	    if (geoScaleToZoom(k, TILESIZE) < _minzoom) {
+	      surface.interrupt();
+	      dispatch$1.call('hitMinZoom', this, map);
+	      setCenterZoom(map.center(), context.minEditableZoom(), 0, true);
+	      scheduleRedraw();
+	      dispatch$1.call('move', this, map);
+	      return;
 	    }
 
+	    projection.transform(eventTransform);
+	    var scale = k / _transformStart.k;
+	    var tX = (x / scale - _transformStart.x) * scale;
+	    var tY = (y / scale - _transformStart.y) * scale;
 
-	    function changeRadio() {
-	        var t = {};
-	        var activeKey;
+	    if (context.inIntro()) {
+	      curtainProjection.transform({
+	        x: x - tX,
+	        y: y - tY,
+	        k: k
+	      });
+	    }
 
-	        if (field.key) {
-	            t[field.key] = undefined;
-	        }
+	    if (source) {
+	      _lastPointerEvent = event;
+	    }
 
-	        radios.each(function(d) {
-	            var active = select(this).property('checked');
-	            if (active) { activeKey = d; }
+	    _isTransformed = true;
+	    _transformLast = eventTransform;
+	    utilSetTransform(supersurface, tX, tY, scale);
+	    scheduleRedraw();
+	    dispatch$1.call('move', this, map);
 
-	            if (field.key) {
-	                if (active) { t[field.key] = d; }
-	            } else {
-	                var val = _oldType[activeKey] || 'yes';
-	                t[d] = active ? val : undefined;
-	            }
-	        });
+	    function isInteger(val) {
+	      return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
+	    }
+	  }
 
-	        if (field.type === 'structureRadio') {
-	            if (activeKey === 'bridge') {
-	                t.layer = '1';
-	            } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
-	                t.layer = '-1';
-	            } else {
-	                t.layer = undefined;
-	            }
-	        }
+	  function resetTransform() {
+	    if (!_isTransformed) return false;
+	    utilSetTransform(supersurface, 0, 0);
+	    _isTransformed = false;
 
-	        dispatch$1.call('change', this, t);
+	    if (context.inIntro()) {
+	      curtainProjection.transform(projection.transform());
 	    }
 
+	    return true;
+	  }
 
-	    radio.tags = function(tags) {
+	  function redraw(difference, extent) {
+	    if (surface.empty() || !_redrawEnabled) return; // If we are in the middle of a zoom/pan, we can't do differenced redraws.
+	    // It would result in artifacts where differenced entities are redrawn with
+	    // one transform and unchanged entities with another.
 
-	        radios.property('checked', function(d) {
-	            if (field.key) {
-	                return tags[field.key] === d;
-	            }
-	            return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
-	        });
+	    if (resetTransform()) {
+	      difference = extent = undefined;
+	    }
 
-	        function isMixed(d) {
-	            if (field.key) {
-	                return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
-	            }
-	            return Array.isArray(tags[d]);
-	        }
+	    var zoom = map.zoom();
+	    var z = String(~~zoom);
 
-	        labels
-	            .classed('active', function(d) {
-	                if (field.key) {
-	                    return (Array.isArray(tags[field.key]) && tags[field.key].includes(d))
-	                        || tags[field.key] === d;
-	                }
-	                return Array.isArray(tags[d]) || !!(tags[d] && tags[d].toLowerCase() !== 'no');
-	            })
-	            .classed('mixed', isMixed)
-	            .attr('title', function(d) {
-	                return isMixed(d) ? _t('inspector.unshared_value_tooltip') : null;
-	            });
+	    if (surface.attr('data-zoom') !== z) {
+	      surface.attr('data-zoom', z);
+	    } // class surface as `lowzoom` around z17-z18.5 (based on latitude)
 
 
-	        var selection = radios.filter(function() { return this.checked; });
+	    var lat = map.center()[1];
+	    var lowzoom = linear$2().domain([-60, 0, 60]).range([17, 18.5, 17]).clamp(true);
+	    surface.classed('low-zoom', zoom <= lowzoom(lat));
 
-	        if (selection.empty()) {
-	            placeholder.text(_t('inspector.none'));
-	        } else {
-	            placeholder.text(selection.attr('value'));
-	            _oldType[selection.datum()] = tags[selection.datum()];
-	        }
+	    if (!difference) {
+	      supersurface.call(context.background());
+	      wrapper.call(drawLayers);
+	    } // OSM
 
-	        if (field.type === 'structureRadio') {
-	            // For waterways without a tunnel tag, set 'culvert' as
-	            // the _oldType to default to if the user picks 'tunnel'
-	            if (!!tags.waterway && !_oldType.tunnel) {
-	                _oldType.tunnel = 'culvert';
-	            }
 
-	            wrap.call(structureExtras, tags);
-	        }
-	    };
+	    if (map.editableDataEnabled() || map.isInWideSelection()) {
+	      context.loadTiles(projection);
+	      drawEditable(difference, extent);
+	    } else {
+	      editOff();
+	    }
 
+	    _transformStart = projection.transform();
+	    return map;
+	  }
 
-	    radio.focus = function() {
-	        radios.node().focus();
-	    };
+	  var immediateRedraw = function immediateRedraw(difference, extent) {
+	    if (!difference && !extent) cancelPendingRedraw();
+	    redraw(difference, extent);
+	  };
 
+	  map.lastPointerEvent = function () {
+	    return _lastPointerEvent;
+	  };
 
-	    radio.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        _oldType = {};
-	        return radio;
-	    };
+	  map.mouse = function (d3_event) {
+	    var event = _lastPointerEvent || d3_event;
 
+	    if (event) {
+	      var s;
 
-	    radio.isAllowed = function() {
-	        return _entityIDs.length === 1;
-	    };
+	      while (s = event.sourceEvent) {
+	        event = s;
+	      }
 
+	      return _getMouseCoords(event);
+	    }
 
-	    return utilRebind(radio, dispatch$1, 'on');
-	}
+	    return null;
+	  }; // returns Lng/Lat
 
-	function uiFieldRestrictions(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var breathe = behaviorBreathe();
-
-	    corePreferences('turn-restriction-via-way', null);                 // remove old key
-	    var storedViaWay = corePreferences('turn-restriction-via-way0');   // use new key #6922
-	    var storedDistance = corePreferences('turn-restriction-distance');
-
-	    var _maxViaWay = storedViaWay !== null ? (+storedViaWay) : 0;
-	    var _maxDistance = storedDistance ? (+storedDistance) : 30;
-	    var _initialized = false;
-	    var _parent = select(null);       // the entire field
-	    var _container = select(null);    // just the map
-	    var _oldTurns;
-	    var _graph;
-	    var _vertexID;
-	    var _intersection;
-	    var _fromWayID;
-
-	    var _lastXPos;
-
-
-	    function restrictions(selection) {
-	        _parent = selection;
-
-	        // try to reuse the intersection, but always rebuild it if the graph has changed
-	        if (_vertexID && (context.graph() !== _graph || !_intersection)) {
-	            _graph = context.graph();
-	            _intersection = osmIntersection(_graph, _vertexID, _maxDistance);
-	        }
-
-	        // It's possible for there to be no actual intersection here.
-	        // for example, a vertex of two `highway=path`
-	        // In this case, hide the field.
-	        var isOK = (
-	            _intersection &&
-	            _intersection.vertices.length &&           // has vertices
-	            _intersection.vertices                     // has the vertex that the user selected
-	                .filter(function(vertex) { return vertex.id === _vertexID; }).length &&
-	            _intersection.ways.length > 2 &&           // has more than 2 ways
-	            _intersection.ways                         // has more than 1 TO way
-	                .filter(function(way) { return way.__to; }).length > 1
-	        );
 
-	        // Also hide in the case where
-	        select(selection.node().parentNode).classed('hide', !isOK);
+	  map.mouseCoordinates = function () {
+	    var coord = map.mouse() || pxCenter();
+	    return projection.invert(coord);
+	  };
 
-	        // if form field is hidden or has detached from dom, clean up.
-	        if (!isOK ||
-	            !context.container().select('.inspector-wrap.inspector-hidden').empty() ||
-	            !selection.node().parentNode ||
-	            !selection.node().parentNode.parentNode) {
-	            selection.call(restrictions.off);
-	            return;
-	        }
+	  map.dblclickZoomEnable = function (val) {
+	    if (!arguments.length) return _dblClickZoomEnabled;
+	    _dblClickZoomEnabled = val;
+	    return map;
+	  };
 
+	  map.redrawEnable = function (val) {
+	    if (!arguments.length) return _redrawEnabled;
+	    _redrawEnabled = val;
+	    return map;
+	  };
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  map.isTransformed = function () {
+	    return _isTransformed;
+	  };
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  function setTransform(t2, duration, force) {
+	    var t = projection.transform();
+	    if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) return false;
 
-	        var container = wrap.selectAll('.restriction-container')
-	            .data([0]);
+	    if (duration) {
+	      _selection.transition().duration(duration).on('start', function () {
+	        map.startEase();
+	      }).call(_zoomerPanner.transform, identity$2.translate(t2.x, t2.y).scale(t2.k));
+	    } else {
+	      projection.transform(t2);
+	      _transformStart = t2;
 
-	        // enter
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'restriction-container');
+	      _selection.call(_zoomerPanner.transform, _transformStart);
+	    }
 
-	        containerEnter
-	            .append('div')
-	            .attr('class', 'restriction-help');
+	    return true;
+	  }
 
-	        // update
-	        _container = containerEnter
-	            .merge(container)
-	            .call(renderViewer);
+	  function setCenterZoom(loc2, z2, duration, force) {
+	    var c = map.center();
+	    var z = map.zoom();
+	    if (loc2[0] === c[0] && loc2[1] === c[1] && z2 === z && !force) return false;
+	    var proj = geoRawMercator().transform(projection.transform()); // copy projection
+
+	    var k2 = clamp(geoZoomToScale(z2, TILESIZE), kMin, kMax);
+	    proj.scale(k2);
+	    var t = proj.translate();
+	    var point = proj(loc2);
+	    var center = pxCenter();
+	    t[0] += center[0] - point[0];
+	    t[1] += center[1] - point[1];
+	    return setTransform(identity$2.translate(t[0], t[1]).scale(k2), duration, force);
+	  }
+
+	  map.pan = function (delta, duration) {
+	    var t = projection.translate();
+	    var k = projection.scale();
+	    t[0] += delta[0];
+	    t[1] += delta[1];
+
+	    if (duration) {
+	      _selection.transition().duration(duration).on('start', function () {
+	        map.startEase();
+	      }).call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
+	    } else {
+	      projection.translate(t);
+	      _transformStart = projection.transform();
 
-	        var controls = wrap.selectAll('.restriction-controls')
-	            .data([0]);
+	      _selection.call(_zoomerPanner.transform, _transformStart);
 
-	        // enter/update
-	        controls.enter()
-	            .append('div')
-	            .attr('class', 'restriction-controls-container')
-	            .append('div')
-	            .attr('class', 'restriction-controls')
-	            .merge(controls)
-	            .call(renderControls);
+	      dispatch$1.call('move', this, map);
+	      immediateRedraw();
 	    }
 
+	    return map;
+	  };
+
+	  map.dimensions = function (val) {
+	    if (!arguments.length) return _dimensions;
+	    _dimensions = val;
+	    drawLayers.dimensions(_dimensions);
+	    context.background().dimensions(_dimensions);
+	    projection.clipExtent([[0, 0], _dimensions]);
+	    _getMouseCoords = utilFastMouse(supersurface.node());
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	    function renderControls(selection) {
-	        var distControl = selection.selectAll('.restriction-distance')
-	            .data([0]);
+	  function zoomIn(delta) {
+	    setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
+	  }
 
-	        distControl.exit()
-	            .remove();
+	  function zoomOut(delta) {
+	    setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
+	  }
 
-	        var distControlEnter = distControl.enter()
-	            .append('div')
-	            .attr('class', 'restriction-control restriction-distance');
-
-	        distControlEnter
-	            .append('span')
-	            .attr('class', 'restriction-control-label restriction-distance-label')
-	            .text(_t('restriction.controls.distance') + ':');
-
-	        distControlEnter
-	            .append('input')
-	            .attr('class', 'restriction-distance-input')
-	            .attr('type', 'range')
-	            .attr('min', '20')
-	            .attr('max', '50')
-	            .attr('step', '5');
-
-	        distControlEnter
-	            .append('span')
-	            .attr('class', 'restriction-distance-text');
-
-	        // update
-	        selection.selectAll('.restriction-distance-input')
-	            .property('value', _maxDistance)
-	            .on('input', function() {
-	                var val = select(this).property('value');
-	                _maxDistance = +val;
-	                _intersection = null;
-	                _container.selectAll('.layer-osm .layer-turns *').remove();
-	                corePreferences('turn-restriction-distance', _maxDistance);
-	                _parent.call(restrictions);
-	            });
+	  map.zoomIn = function () {
+	    zoomIn(1);
+	  };
 
-	        selection.selectAll('.restriction-distance-text')
-	            .text(displayMaxDistance(_maxDistance));
+	  map.zoomInFurther = function () {
+	    zoomIn(4);
+	  };
 
+	  map.canZoomIn = function () {
+	    return map.zoom() < maxZoom;
+	  };
 
-	        var viaControl = selection.selectAll('.restriction-via-way')
-	            .data([0]);
+	  map.zoomOut = function () {
+	    zoomOut(1);
+	  };
 
-	        viaControl.exit()
-	            .remove();
+	  map.zoomOutFurther = function () {
+	    zoomOut(4);
+	  };
 
-	        var viaControlEnter = viaControl.enter()
-	            .append('div')
-	            .attr('class', 'restriction-control restriction-via-way');
-
-	        viaControlEnter
-	            .append('span')
-	            .attr('class', 'restriction-control-label restriction-via-way-label')
-	            .text(_t('restriction.controls.via') + ':');
-
-	        viaControlEnter
-	            .append('input')
-	            .attr('class', 'restriction-via-way-input')
-	            .attr('type', 'range')
-	            .attr('min', '0')
-	            .attr('max', '2')
-	            .attr('step', '1');
-
-	        viaControlEnter
-	            .append('span')
-	            .attr('class', 'restriction-via-way-text');
-
-	        // update
-	        selection.selectAll('.restriction-via-way-input')
-	            .property('value', _maxViaWay)
-	            .on('input', function() {
-	                var val = select(this).property('value');
-	                _maxViaWay = +val;
-	                _container.selectAll('.layer-osm .layer-turns *').remove();
-	                corePreferences('turn-restriction-via-way0', _maxViaWay);
-	                _parent.call(restrictions);
-	            });
+	  map.canZoomOut = function () {
+	    return map.zoom() > minZoom;
+	  };
 
-	        selection.selectAll('.restriction-via-way-text')
-	            .text(displayMaxVia(_maxViaWay));
+	  map.center = function (loc2) {
+	    if (!arguments.length) {
+	      return projection.invert(pxCenter());
 	    }
 
+	    if (setCenterZoom(loc2, map.zoom())) {
+	      dispatch$1.call('move', this, map);
+	    }
 
-	    function renderViewer(selection) {
-	        if (!_intersection) { return; }
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	        var vgraph = _intersection.graph;
-	        var filter = utilFunctor(true);
-	        var projection = geoRawMercator();
+	  map.unobscuredCenterZoomEase = function (loc, zoom) {
+	    var offset = map.unobscuredOffsetPx();
+	    var proj = geoRawMercator().transform(projection.transform()); // copy projection
+	    // use the target zoom to calculate the offset center
 
-	        // Reflow warning: `utilGetDimensions` calls `getBoundingClientRect`
-	        // Instead of asking the restriction-container for its dimensions,
-	        //  we can ask the .sidebar, which can have its dimensions cached.
-	        // width: calc as sidebar - padding
-	        // height: hardcoded (from `80_app.css`)
-	        // var d = utilGetDimensions(selection);
-	        var sdims = utilGetDimensions(context.container().select('.sidebar'));
-	        var d = [ sdims[0] - 50, 370 ];
-	        var c = geoVecScale(d, 0.5);
-	        var z = 22;
+	    proj.scale(geoZoomToScale(zoom, TILESIZE));
+	    var locPx = proj(loc);
+	    var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
+	    var offsetLoc = proj.invert(offsetLocPx);
+	    map.centerZoomEase(offsetLoc, zoom);
+	  };
 
-	        projection.scale(geoZoomToScale(z));
+	  map.unobscuredOffsetPx = function () {
+	    var openPane = context.container().select('.map-panes .map-pane.shown');
 
-	        // Calculate extent of all key vertices
-	        var extent = geoExtent();
-	        for (var i = 0; i < _intersection.vertices.length; i++) {
-	            extent._extend(_intersection.vertices[i].extent());
-	        }
+	    if (!openPane.empty()) {
+	      return [openPane.node().offsetWidth / 2, 0];
+	    }
 
-	        // If this is a large intersection, adjust zoom to fit extent
-	        if (_intersection.vertices.length > 1) {
-	            var padding = 180;   // in z22 pixels
-	            var tl = projection([extent[0][0], extent[1][1]]);
-	            var br = projection([extent[1][0], extent[0][1]]);
-	            var hFactor = (br[0] - tl[0]) / (d[0] - padding);
-	            var vFactor = (br[1] - tl[1]) / (d[1] - padding);
-	            var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
-	            var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
-	            z = z - Math.max(hZoomDiff, vZoomDiff);
-	            projection.scale(geoZoomToScale(z));
-	        }
+	    return [0, 0];
+	  };
 
-	        var padTop = 35;   // reserve top space for hint text
-	        var extentCenter = projection(extent.center());
-	        extentCenter[1] = extentCenter[1] - padTop;
+	  map.zoom = function (z2) {
+	    if (!arguments.length) {
+	      return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
+	    }
 
-	        projection
-	            .translate(geoVecSubtract(c, extentCenter))
-	            .clipExtent([[0, 0], d]);
+	    if (z2 < _minzoom) {
+	      surface.interrupt();
+	      dispatch$1.call('hitMinZoom', this, map);
+	      z2 = context.minEditableZoom();
+	    }
 
-	        var drawLayers = svgLayers(projection, context).only(['osm','touch']).dimensions(d);
-	        var drawVertices = svgVertices(projection, context);
-	        var drawLines = svgLines(projection, context);
-	        var drawTurns = svgTurns(projection, context);
+	    if (setCenterZoom(map.center(), z2)) {
+	      dispatch$1.call('move', this, map);
+	    }
 
-	        var firstTime = selection.selectAll('.surface').empty();
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	        selection
-	            .call(drawLayers);
+	  map.centerZoom = function (loc2, z2) {
+	    if (setCenterZoom(loc2, z2)) {
+	      dispatch$1.call('move', this, map);
+	    }
 
-	        var surface = selection.selectAll('.surface')
-	            .classed('tr', true);
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	        if (firstTime) {
-	            _initialized = true;
+	  map.zoomTo = function (entity) {
+	    var extent = entity.extent(context.graph());
+	    if (!isFinite(extent.area())) return map;
+	    var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
+	    return map.centerZoom(extent.center(), z2);
+	  };
 
-	            surface
-	                .call(breathe);
-	        }
+	  map.centerEase = function (loc2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(loc2, map.zoom(), duration);
+	    return map;
+	  };
 
-	        // This can happen if we've lowered the detail while a FROM way
-	        // is selected, and that way is no longer part of the intersection.
-	        if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
-	            _fromWayID = null;
-	            _oldTurns = null;
-	        }
+	  map.zoomEase = function (z2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(map.center(), z2, duration, false);
+	    return map;
+	  };
 
-	        surface
-	            .call(utilSetDimensions, d)
-	            .call(drawVertices, vgraph, _intersection.vertices, filter, extent, z)
-	            .call(drawLines, vgraph, _intersection.ways, filter)
-	            .call(drawTurns, vgraph, _intersection.turns(_fromWayID, _maxViaWay));
+	  map.centerZoomEase = function (loc2, z2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(loc2, z2, duration, false);
+	    return map;
+	  };
 
-	        surface
-	            .on('click.restrictions', click)
-	            .on('mouseover.restrictions', mouseover);
+	  map.transformEase = function (t2, duration) {
+	    duration = duration || 250;
+	    setTransform(t2, duration, false
+	    /* don't force */
+	    );
+	    return map;
+	  };
 
-	        surface
-	            .selectAll('.selected')
-	            .classed('selected', false);
+	  map.zoomToEase = function (obj, duration) {
+	    var extent;
 
-	        surface
-	            .selectAll('.related')
-	            .classed('related', false);
+	    if (Array.isArray(obj)) {
+	      obj.forEach(function (entity) {
+	        var entityExtent = entity.extent(context.graph());
 
-	        if (_fromWayID) {
-	            var way = vgraph.entity(_fromWayID);
-	            surface
-	                .selectAll('.' + _fromWayID)
-	                .classed('selected', true)
-	                .classed('related', true);
+	        if (!extent) {
+	          extent = entityExtent;
+	        } else {
+	          extent = extent.extend(entityExtent);
 	        }
+	      });
+	    } else {
+	      extent = obj.extent(context.graph());
+	    }
 
-	        document.addEventListener('resizeWindow', function () {
-	            utilSetDimensions(_container, null);
-	            redraw(1);
-	        }, false);
+	    if (!isFinite(extent.area())) return map;
+	    var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
+	    return map.centerZoomEase(extent.center(), z2, duration);
+	  };
 
-	        updateHints(null);
+	  map.startEase = function () {
+	    utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
+	      map.cancelEase();
+	    });
+	    return map;
+	  };
 
+	  map.cancelEase = function () {
+	    _selection.interrupt();
 
-	        function click() {
-	            surface
-	                .call(breathe.off)
-	                .call(breathe);
+	    return map;
+	  };
 
-	            var datum = event.target.__data__;
-	            var entity = datum && datum.properties && datum.properties.entity;
-	            if (entity) {
-	                datum = entity;
-	            }
+	  map.extent = function (val) {
+	    if (!arguments.length) {
+	      return new geoExtent(projection.invert([0, _dimensions[1]]), projection.invert([_dimensions[0], 0]));
+	    } else {
+	      var extent = geoExtent(val);
+	      map.centerZoom(extent.center(), map.extentZoom(extent));
+	    }
+	  };
 
-	            if (datum instanceof osmWay && (datum.__from || datum.__via)) {
-	                _fromWayID = datum.id;
-	                _oldTurns = null;
-	                redraw();
+	  map.trimmedExtent = function (val) {
+	    if (!arguments.length) {
+	      var headerY = 71;
+	      var footerY = 30;
+	      var pad = 10;
+	      return new geoExtent(projection.invert([pad, _dimensions[1] - footerY - pad]), projection.invert([_dimensions[0] - pad, headerY + pad]));
+	    } else {
+	      var extent = geoExtent(val);
+	      map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
+	    }
+	  };
 
-	            } else if (datum instanceof osmTurn) {
-	                var actions, extraActions, turns, i;
-	                var restrictionType = osmInferRestriction(vgraph, datum, projection);
+	  function calcExtentZoom(extent, dim) {
+	    var tl = projection([extent[0][0], extent[1][1]]);
+	    var br = projection([extent[1][0], extent[0][1]]); // Calculate maximum zoom that fits extent
 
-	                if (datum.restrictionID && !datum.direct) {
-	                    return;
+	    var hFactor = (br[0] - tl[0]) / dim[0];
+	    var vFactor = (br[1] - tl[1]) / dim[1];
+	    var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
+	    var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
+	    var newZoom = map.zoom() - Math.max(hZoomDiff, vZoomDiff);
+	    return newZoom;
+	  }
 
-	                } else if (datum.restrictionID && !datum.only) {    // NO -> ONLY
-	                    var seen = {};
-	                    var datumOnly = JSON.parse(JSON.stringify(datum));   // deep clone the datum
-	                    datumOnly.only = true;                               // but change this property
-	                    restrictionType = restrictionType.replace(/^no/, 'only');
-
-	                    // Adding an ONLY restriction should destroy all other direct restrictions from the FROM towards the VIA.
-	                    // We will remember them in _oldTurns, and restore them if the user clicks again.
-	                    turns = _intersection.turns(_fromWayID, 2);
-	                    extraActions = [];
-	                    _oldTurns = [];
-	                    for (i = 0; i < turns.length; i++) {
-	                        var turn = turns[i];
-	                        if (seen[turn.restrictionID]) { continue; }  // avoid deleting the turn twice (#4968, #4928)
-
-	                        if (turn.direct && turn.path[1] === datum.path[1]) {
-	                            seen[turns[i].restrictionID] = true;
-	                            turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
-	                            _oldTurns.push(turn);
-	                            extraActions.push(actionUnrestrictTurn(turn));
-	                        }
-	                    }
+	  map.extentZoom = function (val) {
+	    return calcExtentZoom(geoExtent(val), _dimensions);
+	  };
 
-	                    actions = _intersection.actions.concat(extraActions, [
-	                        actionRestrictTurn(datumOnly, restrictionType),
-	                        _t('operations.restriction.annotation.create')
-	                    ]);
-
-	                } else if (datum.restrictionID) {   // ONLY -> Allowed
-	                    // Restore whatever restrictions we might have destroyed by cycling thru the ONLY state.
-	                    // This relies on the assumption that the intersection was already split up when we
-	                    // performed the previous action (NO -> ONLY), so the IDs in _oldTurns shouldn't have changed.
-	                    turns = _oldTurns || [];
-	                    extraActions = [];
-	                    for (i = 0; i < turns.length; i++) {
-	                        if (turns[i].key !== datum.key) {
-	                            extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
-	                        }
-	                    }
-	                    _oldTurns = null;
-
-	                    actions = _intersection.actions.concat(extraActions, [
-	                        actionUnrestrictTurn(datum),
-	                        _t('operations.restriction.annotation.delete')
-	                    ]);
-
-	                } else {    // Allowed -> NO
-	                    actions = _intersection.actions.concat([
-	                        actionRestrictTurn(datum, restrictionType),
-	                        _t('operations.restriction.annotation.create')
-	                    ]);
-	                }
+	  map.trimmedExtentZoom = function (val) {
+	    var trimY = 120;
+	    var trimX = 40;
+	    var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
+	    return calcExtentZoom(geoExtent(val), trimmed);
+	  };
 
-	                context.perform.apply(context, actions);
+	  map.withinEditableZoom = function () {
+	    return map.zoom() >= context.minEditableZoom();
+	  };
 
-	                // At this point the datum will be changed, but will have same key..
-	                // Refresh it and update the help..
-	                var s = surface.selectAll('.' + datum.key);
-	                datum = s.empty() ? null : s.datum();
-	                updateHints(datum);
+	  map.isInWideSelection = function () {
+	    return !map.withinEditableZoom() && context.selectedIDs().length;
+	  };
 
-	            } else {
-	                _fromWayID = null;
-	                _oldTurns = null;
-	                redraw();
-	            }
-	        }
+	  map.editableDataEnabled = function (skipZoomCheck) {
+	    var layer = context.layers().layer('osm');
+	    if (!layer || !layer.enabled()) return false;
+	    return skipZoomCheck || map.withinEditableZoom();
+	  };
 
+	  map.notesEditable = function () {
+	    var layer = context.layers().layer('notes');
+	    if (!layer || !layer.enabled()) return false;
+	    return map.withinEditableZoom();
+	  };
 
-	        function mouseover() {
-	            var datum = event.target.__data__;
-	            updateHints(datum);
-	        }
+	  map.minzoom = function (val) {
+	    if (!arguments.length) return _minzoom;
+	    _minzoom = val;
+	    return map;
+	  };
 
-	        _lastXPos = _lastXPos || sdims[0];
+	  map.toggleHighlightEdited = function () {
+	    surface.classed('highlight-edited', !surface.classed('highlight-edited'));
+	    map.pan([0, 0]); // trigger a redraw
 
-	        function redraw(minChange) {
-	            var xPos = -1;
+	    dispatch$1.call('changeHighlighting', this);
+	  };
 
-	            if (minChange) {
-	                xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
-	            }
+	  map.areaFillOptions = ['wireframe', 'partial', 'full'];
 
-	            if (!minChange || (minChange && Math.abs(xPos - _lastXPos) >= minChange)) {
-	                if (context.hasEntity(_vertexID)) {
-	                    _lastXPos = xPos;
-	                    _container.call(renderViewer);
-	                }
-	            }
-	        }
+	  map.activeAreaFill = function (val) {
+	    if (!arguments.length) return corePreferences('area-fill') || 'partial';
+	    corePreferences('area-fill', val);
 
+	    if (val !== 'wireframe') {
+	      corePreferences('area-fill-toggle', val);
+	    }
 
-	        function highlightPathsFrom(wayID) {
-	            surface.selectAll('.related')
-	                .classed('related', false)
-	                .classed('allow', false)
-	                .classed('restrict', false)
-	                .classed('only', false);
+	    updateAreaFill();
+	    map.pan([0, 0]); // trigger a redraw
 
-	            surface.selectAll('.' + wayID)
-	                .classed('related', true);
+	    dispatch$1.call('changeAreaFill', this);
+	    return map;
+	  };
 
-	            if (wayID) {
-	                var turns = _intersection.turns(wayID, _maxViaWay);
-	                for (var i = 0; i < turns.length; i++) {
-	                    var turn = turns[i];
-	                    var ids = [turn.to.way];
-	                    var klass = (turn.no ? 'restrict' : (turn.only ? 'only' : 'allow'));
+	  map.toggleWireframe = function () {
+	    var activeFill = map.activeAreaFill();
 
-	                    if (turn.only || turns.length === 1) {
-	                        if (turn.via.ways) {
-	                            ids = ids.concat(turn.via.ways);
-	                        }
-	                    } else if (turn.to.way === wayID) {
-	                        continue;
-	                    }
+	    if (activeFill === 'wireframe') {
+	      activeFill = corePreferences('area-fill-toggle') || 'partial';
+	    } else {
+	      activeFill = 'wireframe';
+	    }
 
-	                    surface.selectAll(utilEntitySelector(ids))
-	                        .classed('related', true)
-	                        .classed('allow', (klass === 'allow'))
-	                        .classed('restrict', (klass === 'restrict'))
-	                        .classed('only', (klass === 'only'));
-	                }
-	            }
-	        }
+	    map.activeAreaFill(activeFill);
+	  };
 
+	  function updateAreaFill() {
+	    var activeFill = map.activeAreaFill();
+	    map.areaFillOptions.forEach(function (opt) {
+	      surface.classed('fill-' + opt, Boolean(opt === activeFill));
+	    });
+	  }
 
-	        function updateHints(datum) {
-	            var help = _container.selectAll('.restriction-help').html('');
+	  map.layers = function () {
+	    return drawLayers;
+	  };
 
-	            var placeholders = {};
-	            ['from', 'via', 'to'].forEach(function(k) {
-	                placeholders[k] = '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>';
-	            });
+	  map.doubleUpHandler = function () {
+	    return _doubleUpHandler;
+	  };
 
-	            var entity = datum && datum.properties && datum.properties.entity;
-	            if (entity) {
-	                datum = entity;
-	            }
+	  return utilRebind(map, dispatch$1, 'on');
+	}
 
-	            if (_fromWayID) {
-	                way = vgraph.entity(_fromWayID);
-	                surface
-	                    .selectAll('.' + _fromWayID)
-	                    .classed('selected', true)
-	                    .classed('related', true);
-	            }
+	function rendererPhotos(context) {
+	  var dispatch$1 = dispatch('change');
+	  var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
+	  var _allPhotoTypes = ['flat', 'panoramic'];
 
-	            // Hovering a way
-	            if (datum instanceof osmWay && datum.__from) {
-	                way = datum;
-
-	                highlightPathsFrom(_fromWayID ? null : way.id);
-	                surface.selectAll('.' + way.id)
-	                    .classed('related', true);
-
-	                var clickSelect = (!_fromWayID || _fromWayID !== way.id);
-	                help
-	                    .append('div')      // "Click to select FROM {fromName}." / "FROM {fromName}"
-	                    .html(_t('restriction.help.' + (clickSelect ? 'select_from_name' : 'from_name'), {
-	                        from: placeholders.from,
-	                        fromName: displayName(way.id, vgraph)
-	                    }));
-
-
-	            // Hovering a turn arrow
-	            } else if (datum instanceof osmTurn) {
-	                var restrictionType = osmInferRestriction(vgraph, datum, projection);
-	                var turnType = restrictionType.replace(/^(only|no)\_/, '');
-	                var indirect = (datum.direct === false ? _t('restriction.help.indirect') : '');
-	                var klass, turnText, nextText;
-
-	                if (datum.no) {
-	                    klass = 'restrict';
-	                    turnText = _t('restriction.help.turn.no_' + turnType, { indirect: indirect });
-	                    nextText = _t('restriction.help.turn.only_' + turnType, { indirect: '' });
-	                } else if (datum.only) {
-	                    klass = 'only';
-	                    turnText = _t('restriction.help.turn.only_' + turnType, { indirect: indirect });
-	                    nextText = _t('restriction.help.turn.allowed_' + turnType, { indirect: '' });
-	                } else {
-	                    klass = 'allow';
-	                    turnText = _t('restriction.help.turn.allowed_' + turnType, { indirect: indirect });
-	                    nextText = _t('restriction.help.turn.no_' + turnType, { indirect: '' });
-	                }
+	  var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy
 
-	                help
-	                    .append('div')      // "NO Right Turn (indirect)"
-	                    .attr('class', 'qualifier ' + klass)
-	                    .text(turnText);
-
-	                help
-	                    .append('div')      // "FROM {fromName} TO {toName}"
-	                    .html(_t('restriction.help.from_name_to_name', {
-	                        from: placeholders.from,
-	                        fromName: displayName(datum.from.way, vgraph),
-	                        to: placeholders.to,
-	                        toName: displayName(datum.to.way, vgraph)
-	                    }));
-
-	                if (datum.via.ways && datum.via.ways.length) {
-	                    var names = [];
-	                    for (var i = 0; i < datum.via.ways.length; i++) {
-	                        var prev = names[names.length - 1];
-	                        var curr = displayName(datum.via.ways[i], vgraph);
-	                        if (!prev || curr !== prev)   // collapse identical names
-	                            { names.push(curr); }
-	                    }
 
-	                    help
-	                        .append('div')      // "VIA {viaNames}"
-	                        .html(_t('restriction.help.via_names', {
-	                            via: placeholders.via,
-	                            viaNames: names.join(', ')
-	                        }));
-	                }
+	  var _dateFilters = ['fromDate', 'toDate'];
 
-	                if (!indirect) {
-	                    help
-	                        .append('div')      // Click for "No Right Turn"
-	                        .text(_t('restriction.help.toggle', { turn: nextText.trim() }));
-	                }
+	  var _fromDate;
 
-	                highlightPathsFrom(null);
-	                var alongIDs = datum.path.slice();
-	                surface.selectAll(utilEntitySelector(alongIDs))
-	                    .classed('related', true)
-	                    .classed('allow', (klass === 'allow'))
-	                    .classed('restrict', (klass === 'restrict'))
-	                    .classed('only', (klass === 'only'));
+	  var _toDate;
 
+	  var _usernames;
 
-	            // Hovering empty surface
-	            } else {
-	                highlightPathsFrom(null);
-	                if (_fromWayID) {
-	                    help
-	                        .append('div')      // "FROM {fromName}"
-	                        .html(_t('restriction.help.from_name', {
-	                            from: placeholders.from,
-	                            fromName: displayName(_fromWayID, vgraph)
-	                        }));
-
-	                } else {
-	                    help
-	                        .append('div')      // "Click to select a FROM segment."
-	                        .html(_t('restriction.help.select_from', {
-	                            from: placeholders.from
-	                        }));
-	                }
-	            }
-	        }
+	  function photos() {}
+
+	  function updateStorage() {
+	    if (window.mocha) return;
+	    var hash = utilStringQs(window.location.hash);
+	    var enabled = context.layers().all().filter(function (d) {
+	      return _layerIDs.indexOf(d.id) !== -1 && d.layer && d.layer.supported() && d.layer.enabled();
+	    }).map(function (d) {
+	      return d.id;
+	    });
+
+	    if (enabled.length) {
+	      hash.photo_overlay = enabled.join(',');
+	    } else {
+	      delete hash.photo_overlay;
 	    }
 
+	    window.location.replace('#' + utilQsString(hash, true));
+	  }
 
-	    function displayMaxDistance(maxDist) {
-	        var isImperial = !_mainLocalizer.usesMetric();
-	        var opts;
+	  photos.overlayLayerIDs = function () {
+	    return _layerIDs;
+	  };
 
-	        if (isImperial) {
-	            var distToFeet = {   // imprecise conversion for prettier display
-	                20: 70, 25: 85, 30: 100, 35: 115, 40: 130, 45: 145, 50: 160
-	            }[maxDist];
-	            opts = { distance: _t('units.feet', { quantity: distToFeet }) };
-	        } else {
-	            opts = { distance: _t('units.meters', { quantity: maxDist }) };
-	        }
+	  photos.allPhotoTypes = function () {
+	    return _allPhotoTypes;
+	  };
 
-	        return _t('restriction.controls.distance_up_to', opts);
-	    }
+	  photos.dateFilters = function () {
+	    return _dateFilters;
+	  };
+
+	  photos.dateFilterValue = function (val) {
+	    return val === _dateFilters[0] ? _fromDate : _toDate;
+	  };
 
+	  photos.setDateFilter = function (type, val, updateUrl) {
+	    // validate the date
+	    var date = val && new Date(val);
 
-	    function displayMaxVia(maxVia) {
-	        return maxVia === 0 ? _t('restriction.controls.via_node_only')
-	            : maxVia === 1 ? _t('restriction.controls.via_up_to_one')
-	            : _t('restriction.controls.via_up_to_two');
+	    if (date && !isNaN(date)) {
+	      val = date.toISOString().substr(0, 10);
+	    } else {
+	      val = null;
 	    }
 
+	    if (type === _dateFilters[0]) {
+	      _fromDate = val;
 
-	    function displayName(entityID, graph) {
-	        var entity = graph.entity(entityID);
-	        var name = utilDisplayName(entity) || '';
-	        var matched = _mainPresetIndex.match(entity, graph);
-	        var type = (matched && matched.name()) || utilDisplayType(entity.id);
-	        return name || type;
+	      if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+	        _toDate = _fromDate;
+	      }
 	    }
 
+	    if (type === _dateFilters[1]) {
+	      _toDate = val;
 
-	    restrictions.entityIDs = function(val) {
-	        _intersection = null;
-	        _fromWayID = null;
-	        _oldTurns = null;
-	        _vertexID = val[0];
-	    };
-
+	      if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+	        _fromDate = _toDate;
+	      }
+	    }
 
-	    restrictions.tags = function() {};
-	    restrictions.focus = function() {};
+	    dispatch$1.call('change', this);
 
+	    if (updateUrl) {
+	      var rangeString;
 
-	    restrictions.off = function(selection) {
-	        if (!_initialized) { return; }
+	      if (_fromDate || _toDate) {
+	        rangeString = (_fromDate || '') + '_' + (_toDate || '');
+	      }
 
-	        selection.selectAll('.surface')
-	            .call(breathe.off)
-	            .on('click.restrictions', null)
-	            .on('mouseover.restrictions', null);
+	      setUrlFilterValue('photo_dates', rangeString);
+	    }
+	  };
 
-	        select(window)
-	            .on('resize.restrictions', null);
-	    };
+	  photos.setUsernameFilter = function (val, updateUrl) {
+	    if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');
 
+	    if (val) {
+	      val = val.map(function (d) {
+	        return d.trim();
+	      }).filter(Boolean);
 
-	    return utilRebind(restrictions, dispatch$1, 'on');
-	}
+	      if (!val.length) {
+	        val = null;
+	      }
+	    }
 
-	uiFieldRestrictions.supportsMultiselection = false;
+	    _usernames = val;
+	    dispatch$1.call('change', this);
 
-	function uiFieldTextarea(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var input = select(null);
-	    var _tags;
+	    if (updateUrl) {
+	      var hashString;
 
+	      if (_usernames) {
+	        hashString = _usernames.join(',');
+	      }
 
-	    function textarea(selection) {
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	      setUrlFilterValue('photo_username', hashString);
+	    }
+	  };
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  function setUrlFilterValue(property, val) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	        input = wrap.selectAll('textarea')
-	            .data([0]);
+	      if (val) {
+	        if (hash[property] === val) return;
+	        hash[property] = val;
+	      } else {
+	        if (!(property in hash)) return;
+	        delete hash[property];
+	      }
 
-	        input = input.enter()
-	            .append('textarea')
-	            .attr('id', field.domId)
-	            .call(utilNoAuto)
-	            .on('input', change(true))
-	            .on('blur', change())
-	            .on('change', change())
-	            .merge(input);
+	      window.location.replace('#' + utilQsString(hash, true));
 	    }
+	  }
 
+	  function showsLayer(id) {
+	    var layer = context.layers().layer(id);
+	    return layer && layer.supported() && layer.enabled();
+	  }
 
-	    function change(onInput) {
-	        return function() {
-
-	            var val = utilGetSetValue(input);
-	            if (!onInput) { val = context.cleanTagValue(val); }
-
-	            // don't override multiple values with blank string
-	            if (!val && Array.isArray(_tags[field.key])) { return; }
+	  photos.shouldFilterByDate = function () {
+	    return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
+	  };
 
-	            var t = {};
-	            t[field.key] = val || undefined;
-	            dispatch$1.call('change', this, t, onInput);
-	        };
-	    }
+	  photos.shouldFilterByPhotoType = function () {
+	    return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('openstreetcam');
+	  };
 
+	  photos.shouldFilterByUsername = function () {
+	    return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
+	  };
 
-	    textarea.tags = function(tags) {
-	        _tags = tags;
+	  photos.showsPhotoType = function (val) {
+	    if (!photos.shouldFilterByPhotoType()) return true;
+	    return _shownPhotoTypes.indexOf(val) !== -1;
+	  };
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	  photos.showsFlat = function () {
+	    return photos.showsPhotoType('flat');
+	  };
 
-	        utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '')
-	            .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : (field.placeholder() || _t('inspector.unknown')))
-	            .classed('mixed', isMixed);
-	    };
+	  photos.showsPanoramic = function () {
+	    return photos.showsPhotoType('panoramic');
+	  };
 
+	  photos.fromDate = function () {
+	    return _fromDate;
+	  };
 
-	    textarea.focus = function() {
-	        input.node().focus();
-	    };
+	  photos.toDate = function () {
+	    return _toDate;
+	  };
 
+	  photos.togglePhotoType = function (val) {
+	    var index = _shownPhotoTypes.indexOf(val);
 
-	    return utilRebind(textarea, dispatch$1, 'on');
-	}
+	    if (index !== -1) {
+	      _shownPhotoTypes.splice(index, 1);
+	    } else {
+	      _shownPhotoTypes.push(val);
+	    }
 
-	function uiFieldWikidata(field, context) {
-	    var wikidata = services.wikidata;
-	    var dispatch$1 = dispatch('change');
-
-	    var _selection = select(null);
-	    var _searchInput = select(null);
-	    var _qid = null;
-	    var _wikidataEntity = null;
-	    var _wikiURL = '';
-	    var _entityIDs = [];
-
-	    var _wikipediaKey = field.keys && field.keys.find(function(key) {
-	            return key.includes('wikipedia');
-	        }),
-	        _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
+	    dispatch$1.call('change', this);
+	    return photos;
+	  };
 
-	    var combobox = uiCombobox(context, 'combo-' + field.safeid)
-	        .caseSensitive(true)
-	        .minItems(1);
+	  photos.usernames = function () {
+	    return _usernames;
+	  };
 
-	    function wiki(selection) {
+	  photos.init = function () {
+	    var hash = utilStringQs(window.location.hash);
 
-	        _selection = selection;
+	    if (hash.photo_dates) {
+	      // expect format like `photo_dates=2019-01-01_2020-12-31`, but allow a couple different separators
+	      var parts = /^(.*)[–_](.*)$/g.exec(hash.photo_dates.trim());
+	      this.setDateFilter('fromDate', parts && parts.length >= 2 && parts[1], false);
+	      this.setDateFilter('toDate', parts && parts.length >= 3 && parts[2], false);
+	    }
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    if (hash.photo_username) {
+	      this.setUsernameFilter(hash.photo_username, false);
+	    }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
-
-
-	        var list = wrap.selectAll('ul')
-	            .data([0]);
-
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(list);
-
-	        var searchRow = list.selectAll('li.wikidata-search')
-	            .data([0]);
-
-	        var searchRowEnter = searchRow.enter()
-	            .append('li')
-	            .attr('class', 'wikidata-search');
-
-	        searchRowEnter
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('id', field.domId)
-	            .style('flex', '1')
-	            .call(utilNoAuto)
-	            .on('focus', function() {
-	                var node = select(this).node();
-	                node.setSelectionRange(0, node.value.length);
-	            })
-	            .on('blur', function() {
-	                setLabelForEntity();
-	            })
-	            .call(combobox.fetcher(fetchWikidataItems));
-
-	        combobox.on('accept', function(d) {
-	            _qid = d.id;
-	            change();
-	        }).on('cancel', function() {
-	            setLabelForEntity();
-	        });
+	    if (hash.photo_overlay) {
+	      // support enabling photo layers by default via a URL parameter, e.g. `photo_overlay=openstreetcam;mapillary;streetside`
+	      var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
+	      hashOverlayIDs.forEach(function (id) {
+	        var layer = _layerIDs.indexOf(id) !== -1 && context.layers().layer(id);
+	        if (layer && !layer.enabled()) layer.enabled(true);
+	      });
+	    }
 
-	        searchRowEnter
-	            .append('button')
-	            .attr('class', 'form-field-button wiki-link')
-	            .attr('title', _t('icons.view_on', { domain: 'wikidata.org' }))
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-out-link'))
-	            .on('click', function() {
-	                event.preventDefault();
-	                if (_wikiURL) { window.open(_wikiURL, '_blank'); }
-	            });
+	    if (hash.photo) {
+	      // support opening a photo via a URL parameter, e.g. `photo=mapillary-fztgSDtLpa08ohPZFZjeRQ`
+	      var photoIds = hash.photo.replace(/;/g, ',').split(',');
+	      var photoId = photoIds.length && photoIds[0].trim();
+	      var results = /(.*)\/(.*)/g.exec(photoId);
+
+	      if (results && results.length >= 3) {
+	        var serviceId = results[1];
+	        var photoKey = results[2];
+	        var service = services[serviceId];
+
+	        if (service && service.ensureViewerLoaded) {
+	          // if we're showing a photo then make sure its layer is enabled too
+	          var layer = _layerIDs.indexOf(serviceId) !== -1 && context.layers().layer(serviceId);
+	          if (layer && !layer.enabled()) layer.enabled(true);
+	          var baselineTime = Date.now();
+	          service.on('loadedImages.rendererPhotos', function () {
+	            // don't open the viewer if too much time has elapsed
+	            if (Date.now() - baselineTime > 45000) {
+	              service.on('loadedImages.rendererPhotos', null);
+	              return;
+	            }
 
-	        searchRow = searchRow.merge(searchRowEnter);
-
-	        _searchInput = searchRow.select('input');
-
-	        var wikidataProperties = ['description', 'identifier'];
-
-	        var items = list.selectAll('li.labeled-input')
-	            .data(wikidataProperties);
-
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'labeled-input preset-wikidata-' + d; });
-
-	        enter
-	            .append('span')
-	            .attr('class', 'label')
-	            .text(function(d) { return _t('wikidata.' + d); });
-
-	        enter
-	            .append('input')
-	            .attr('type', 'text')
-	            .call(utilNoAuto)
-	            .classed('disabled', 'true')
-	            .attr('readonly', 'true');
-
-	        enter
-	            .append('button')
-	            .attr('class', 'form-field-button')
-	            .attr('title', _t('icons.copy'))
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-operation-copy'))
-	            .on('click', function() {
-	                event.preventDefault();
-	                select(this.parentNode)
-	                    .select('input')
-	                    .node()
-	                    .select();
-	                document.execCommand('copy');
+	            if (!service.cachedImage(photoKey)) return;
+	            service.on('loadedImages.rendererPhotos', null);
+	            service.ensureViewerLoaded(context).then(function () {
+	              service.selectImage(context, photoKey).showViewer(context);
 	            });
-
+	          });
+	        }
+	      }
 	    }
 
-	    function fetchWikidataItems(q, callback) {
+	    context.layers().on('change.rendererPhotos', updateStorage);
+	  };
 
-	        if (!q && _hintKey) {
-	            // other tags may be good search terms
-	            for (var i in _entityIDs) {
-	                var entity = context.hasEntity(_entityIDs[i]);
-	                if (entity.tags[_hintKey]) {
-	                    q = entity.tags[_hintKey];
-	                    break;
-	                }
-	            }
-	        }
+	  return utilRebind(photos, dispatch$1, 'on');
+	}
 
-	        wikidata.itemsForSearchQuery(q, function(err, data) {
-	            if (err) { return; }
+	function uiAccount(context) {
+	  var osm = context.connection();
 
-	            for (var i in data) {
-	                data[i].value = data[i].label + ' (' +  data[i].id + ')';
-	                data[i].title = data[i].description;
-	            }
+	  function update(selection) {
+	    if (!osm) return;
 
-	            if (callback) { callback(data); }
-	        });
+	    if (!osm.authenticated()) {
+	      selection.selectAll('.userLink, .logoutLink').classed('hide', true);
+	      return;
 	    }
 
+	    osm.userDetails(function (err, details) {
+	      var userLink = selection.select('.userLink'),
+	          logoutLink = selection.select('.logoutLink');
+	      userLink.html('');
+	      logoutLink.html('');
+	      if (err || !details) return;
+	      selection.selectAll('.userLink, .logoutLink').classed('hide', false); // Link
 
-	    function change() {
-	        var syncTags = {};
-	        syncTags[field.key] = _qid;
-	        dispatch$1.call('change', this, syncTags);
-
-	        // attempt asynchronous update of wikidata tag..
-	        var initGraph = context.graph();
-	        var initEntityIDs = _entityIDs;
+	      var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont
 
-	        wikidata.entityByQID(_qid, function(err, entity) {
-	            if (err) { return; }
+	      if (details.image_url) {
+	        userLinkA.append('img').attr('class', 'icon pre-text user-icon').attr('src', details.image_url);
+	      } else {
+	        userLinkA.call(svgIcon('#iD-icon-avatar', 'pre-text light'));
+	      } // Add user name
 
-	            // If graph has changed, we can't apply this update.
-	            if (context.graph() !== initGraph) { return; }
 
-	            if (!entity.sitelinks) { return; }
+	      userLinkA.append('span').attr('class', 'label').html(details.display_name);
+	      logoutLink.append('a').attr('class', 'logout').attr('href', '#').html(_t.html('logout')).on('click.logout', function (d3_event) {
+	        d3_event.preventDefault();
+	        osm.logout();
+	      });
+	    });
+	  }
 
-	            var langs = wikidata.languagesToQuery();
-	            // use the label and description languages as fallbacks
-	            ['labels', 'descriptions'].forEach(function(key) {
-	                if (!entity[key]) { return; }
+	  return function (selection) {
+	    selection.append('li').attr('class', 'userLink').classed('hide', true);
+	    selection.append('li').attr('class', 'logoutLink').classed('hide', true);
 
-	                var valueLangs = Object.keys(entity[key]);
-	                if (valueLangs.length === 0) { return; }
-	                var valueLang = valueLangs[0];
+	    if (osm) {
+	      osm.on('change.account', function () {
+	        update(selection);
+	      });
+	      update(selection);
+	    }
+	  };
+	}
 
-	                if (langs.indexOf(valueLang) === -1) {
-	                    langs.push(valueLang);
-	                }
-	            });
+	function uiAttribution(context) {
+	  var _selection = select(null);
 
-	            var newWikipediaValue;
-
-	            if (_wikipediaKey) {
-	                var foundPreferred;
-	                for (var i in langs) {
-	                    var lang = langs[i];
-	                    var siteID = lang.replace('-', '_') + 'wiki';
-	                    if (entity.sitelinks[siteID]) {
-	                        foundPreferred = true;
-	                        newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title;
-	                        // use the first match
-	                        break;
-	                    }
-	                }
+	  function render(selection, data, klass) {
+	    var div = selection.selectAll(".".concat(klass)).data([0]);
+	    div = div.enter().append('div').attr('class', klass).merge(div);
+	    var attributions = div.selectAll('.attribution').data(data, function (d) {
+	      return d.id;
+	    });
+	    attributions.exit().remove();
+	    attributions = attributions.enter().append('span').attr('class', 'attribution').each(function (d, i, nodes) {
+	      var attribution = select(nodes[i]);
 
-	                if (!foundPreferred) {
-	                    // No wikipedia sites available in the user's language or the fallback languages,
-	                    // default to any wikipedia sitelink
+	      if (d.terms_html) {
+	        attribution.html(d.terms_html);
+	        return;
+	      }
 
-	                    var wikiSiteKeys = Object.keys(entity.sitelinks).filter(function(site) {
-	                        return site.endsWith('wiki');
-	                    });
+	      if (d.terms_url) {
+	        attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
+	      }
 
-	                    if (wikiSiteKeys.length === 0) {
-	                        // if no wikipedia pages are linked to this wikidata entity, delete that tag
-	                        newWikipediaValue = null;
-	                    } else {
-	                        var wikiLang = wikiSiteKeys[0].slice(0, -4).replace('_', '-');
-	                        var wikiTitle = entity.sitelinks[wikiSiteKeys[0]].title;
-	                        newWikipediaValue = wikiLang + ':' + wikiTitle;
-	                    }
-	                }
-	            }
+	      var sourceID = d.id.replace(/\./g, '<TX_DOT>');
+	      var terms_text = _t("imagery.".concat(sourceID, ".attribution.text"), {
+	        "default": d.terms_text || d.id || d.name()
+	      });
 
-	            if (newWikipediaValue) {
-	                newWikipediaValue = context.cleanTagValue(newWikipediaValue);
-	            }
+	      if (d.icon && !d.overlay) {
+	        attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
+	      }
 
-	            if (typeof newWikipediaValue === 'undefined') { return; }
+	      attribution.append('span').attr('class', 'attribution-text').html(terms_text);
+	    }).merge(attributions);
+	    var copyright = attributions.selectAll('.copyright-notice').data(function (d) {
+	      var notice = d.copyrightNotices(context.map().zoom(), context.map().extent());
+	      return notice ? [notice] : [];
+	    });
+	    copyright.exit().remove();
+	    copyright = copyright.enter().append('span').attr('class', 'copyright-notice').merge(copyright);
+	    copyright.html(String);
+	  }
 
-	            var actions = initEntityIDs.map(function(entityID) {
-	                var entity = context.hasEntity(entityID);
-	                if (!entity) { return; }
+	  function update() {
+	    var baselayer = context.background().baseLayerSource();
 
-	                var currTags = Object.assign({}, entity.tags);  // shallow copy
-	                if (newWikipediaValue === null) {
-	                    if (!currTags[_wikipediaKey]) { return; }
+	    _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');
 
-	                    delete currTags[_wikipediaKey];
-	                } else {
-	                    currTags[_wikipediaKey] = newWikipediaValue;
-	                }
+	    var z = context.map().zoom();
+	    var overlays = context.background().overlayLayerSources() || [];
 
-	                return actionChangeTags(entityID, currTags);
-	            }).filter(Boolean);
+	    _selection.call(render, overlays.filter(function (s) {
+	      return s.validZoom(z);
+	    }), 'overlay-layer-attribution');
+	  }
 
-	            if (!actions.length) { return; }
+	  return function (selection) {
+	    _selection = selection;
+	    context.background().on('change.attribution', update);
+	    context.map().on('move.attribution', throttle(update, 400, {
+	      leading: false
+	    }));
+	    update();
+	  };
+	}
 
-	            // Coalesce the update of wikidata tag into the previous tag change
-	            context.overwrite(
-	                function actionUpdateWikipediaTags(graph) {
-	                    actions.forEach(function(action) {
-	                        graph = action(graph);
-	                    });
-	                    return graph;
-	                },
-	                context.history().undoAnnotation()
-	            );
+	function uiContributors(context) {
+	  var osm = context.connection(),
+	      debouncedUpdate = debounce(function () {
+	    update();
+	  }, 1000),
+	      limit = 4,
+	      hidden = false,
+	      wrap = select(null);
 
-	            // do not dispatch.call('change') here, because entity_editor
-	            // changeTags() is not intended to be called asynchronously
-	        });
+	  function update() {
+	    if (!osm) return;
+	    var users = {},
+	        entities = context.history().intersects(context.map().extent());
+	    entities.forEach(function (entity) {
+	      if (entity && entity.user) users[entity.user] = true;
+	    });
+	    var u = Object.keys(users),
+	        subset = u.slice(0, u.length > limit ? limit - 1 : limit);
+	    wrap.html('').call(svgIcon('#iD-icon-nearby', 'pre-text light'));
+	    var userList = select(document.createElement('span'));
+	    userList.selectAll().data(subset).enter().append('a').attr('class', 'user-link').attr('href', function (d) {
+	      return osm.userURL(d);
+	    }).attr('target', '_blank').html(String);
+
+	    if (u.length > limit) {
+	      var count = select(document.createElement('span'));
+	      var othersNum = u.length - limit + 1;
+	      count.append('a').attr('target', '_blank').attr('href', function () {
+	        return osm.changesetsURL(context.map().center(), context.map().zoom());
+	      }).html(othersNum);
+	      wrap.append('span').html(_t.html('contributors.truncated_list', {
+	        n: othersNum,
+	        users: userList.html(),
+	        count: count.html()
+	      }));
+	    } else {
+	      wrap.append('span').html(_t.html('contributors.list', {
+	        users: userList.html()
+	      }));
 	    }
 
-	    function setLabelForEntity() {
-	        var label = '';
-	        if (_wikidataEntity) {
-	            label = entityPropertyForDisplay(_wikidataEntity, 'labels');
-	            if (label.length === 0) {
-	                label = _wikidataEntity.id.toString();
-	            }
-	        }
-	        utilGetSetValue(_searchInput, label);
+	    if (!u.length) {
+	      hidden = true;
+	      wrap.transition().style('opacity', 0);
+	    } else if (hidden) {
+	      wrap.transition().style('opacity', 1);
 	    }
+	  }
 
+	  return function (selection) {
+	    if (!osm) return;
+	    wrap = selection;
+	    update();
+	    osm.on('loaded.contributors', debouncedUpdate);
+	    context.map().on('move.contributors', debouncedUpdate);
+	  };
+	}
 
-	    wiki.tags = function(tags) {
+	var _popoverID = 0;
+	function uiPopover(klass) {
+	  var _id = _popoverID++;
 
-	        var isMixed = Array.isArray(tags[field.key]);
-	        _searchInput
-	            .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null)
-	            .attr('placeholder', isMixed ? _t('inspector.multiple_values') : '')
-	            .classed('mixed', isMixed);
+	  var _anchorSelection = select(null);
 
-	        _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
+	  var popover = function popover(selection) {
+	    _anchorSelection = selection;
+	    selection.each(setup);
+	  };
 
-	        if (!/^Q[0-9]*$/.test(_qid)) {   // not a proper QID
-	            unrecognized();
-	            return;
-	        }
+	  var _animation = utilFunctor(false);
 
-	        // QID value in correct format
-	        _wikiURL = 'https://wikidata.org/wiki/' + _qid;
-	        wikidata.entityByQID(_qid, function(err, entity) {
-	            if (err) {
-	                unrecognized();
-	                return;
-	            }
-	            _wikidataEntity = entity;
+	  var _placement = utilFunctor('top'); // top, bottom, left, right
 
-	            setLabelForEntity();
 
-	            var description = entityPropertyForDisplay(entity, 'descriptions');
+	  var _alignment = utilFunctor('center'); // leading, center, trailing
 
-	            _selection.select('button.wiki-link')
-	                .classed('disabled', false);
 
-	            _selection.select('.preset-wikidata-description')
-	                .style('display', function(){
-	                    return description.length > 0 ? 'flex' : 'none';
-	                })
-	                .select('input')
-	                .attr('value', description);
+	  var _scrollContainer = utilFunctor(select(null));
 
-	            _selection.select('.preset-wikidata-identifier')
-	                .style('display', function(){
-	                    return entity.id ? 'flex' : 'none';
-	                })
-	                .select('input')
-	                .attr('value', entity.id);
-	        });
+	  var _content;
 
+	  var _displayType = utilFunctor('');
 
-	        // not a proper QID
-	        function unrecognized() {
-	            _wikidataEntity = null;
-	            setLabelForEntity();
+	  var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events
 
-	            _selection.select('.preset-wikidata-description')
-	                .style('display', 'none');
-	            _selection.select('.preset-wikidata-identifier')
-	                .style('display', 'none');
 
-	            _selection.select('button.wiki-link')
-	                .classed('disabled', true);
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	            if (_qid && _qid !== '') {
-	                _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
-	            } else {
-	                _wikiURL = '';
-	            }
-	        }
-	    };
+	  popover.displayType = function (val) {
+	    if (arguments.length) {
+	      _displayType = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _displayType;
+	    }
+	  };
 
-	    function entityPropertyForDisplay(wikidataEntity, propKey) {
-	        if (!wikidataEntity[propKey]) { return ''; }
-	        var propObj = wikidataEntity[propKey];
-	        var langKeys = Object.keys(propObj);
-	        if (langKeys.length === 0) { return ''; }
-	        // sorted by priority, since we want to show the user's language first if possible
-	        var langs = wikidata.languagesToQuery();
-	        for (var i in langs) {
-	            var lang = langs[i];
-	            var valueObj = propObj[lang];
-	            if (valueObj && valueObj.value && valueObj.value.length > 0) { return valueObj.value; }
-	        }
-	        // default to any available value
-	        return propObj[langKeys[0]].value;
+	  popover.hasArrow = function (val) {
+	    if (arguments.length) {
+	      _hasArrow = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _hasArrow;
 	    }
+	  };
 
+	  popover.placement = function (val) {
+	    if (arguments.length) {
+	      _placement = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _placement;
+	    }
+	  };
 
-	    wiki.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return wiki;
-	    };
+	  popover.alignment = function (val) {
+	    if (arguments.length) {
+	      _alignment = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _alignment;
+	    }
+	  };
 
+	  popover.scrollContainer = function (val) {
+	    if (arguments.length) {
+	      _scrollContainer = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _scrollContainer;
+	    }
+	  };
 
-	    wiki.focus = function() {
-	        _searchInput.node().focus();
-	    };
+	  popover.content = function (val) {
+	    if (arguments.length) {
+	      _content = val;
+	      return popover;
+	    } else {
+	      return _content;
+	    }
+	  };
 
+	  popover.isShown = function () {
+	    var popoverSelection = _anchorSelection.select('.popover-' + _id);
 
-	    return utilRebind(wiki, dispatch$1, 'on');
-	}
+	    return !popoverSelection.empty() && popoverSelection.classed('in');
+	  };
 
-	function uiFieldWikipedia(field, context) {
-	  var arguments$1 = arguments;
+	  popover.show = function () {
+	    _anchorSelection.each(show);
+	  };
 
-	  var dispatch$1 = dispatch('change');
-	  var wikipedia = services.wikipedia;
-	  var wikidata = services.wikidata;
-	  var _langInput = select(null);
-	  var _titleInput = select(null);
-	  var _wikiURL = '';
-	  var _entityIDs;
-	  var _tags;
+	  popover.updateContent = function () {
+	    _anchorSelection.each(updateContent);
+	  };
 
-	  var _dataWikipedia = [];
-	  _mainFileFetcher.get('wmf_sitematrix')
-	    .then(function (d) {
-	      _dataWikipedia = d;
-	      if (_tags) { updateForTags(_tags); }
-	    })
-	    .catch(function () { /* ignore */ });
+	  popover.hide = function () {
+	    _anchorSelection.each(hide);
+	  };
 
+	  popover.toggle = function () {
+	    _anchorSelection.each(toggle);
+	  };
 
-	  var langCombo = uiCombobox(context, 'wikipedia-lang')
-	    .fetcher(function (value, callback) {
-	      var v = value.toLowerCase();
-	      callback(_dataWikipedia
-	        .filter(function (d) {
-	          return d[0].toLowerCase().indexOf(v) >= 0 ||
-	            d[1].toLowerCase().indexOf(v) >= 0 ||
-	            d[2].toLowerCase().indexOf(v) >= 0;
-	        })
-	        .map(function (d) { return ({ value: d[1] }); })
-	      );
-	    });
+	  popover.destroy = function (selection, selector) {
+	    // by default, just destroy the current popover
+	    selector = selector || '.popover-' + _id;
+	    selection.on(_pointerPrefix + 'enter.popover', null).on(_pointerPrefix + 'leave.popover', null).on(_pointerPrefix + 'up.popover', null).on(_pointerPrefix + 'down.popover', null).on('click.popover', null).attr('title', function () {
+	      return this.getAttribute('data-original-title') || this.getAttribute('title');
+	    }).attr('data-original-title', null).selectAll(selector).remove();
+	  };
 
-	  var titleCombo = uiCombobox(context, 'wikipedia-title')
-	    .fetcher(function (value, callback) {
-	      if (!value) {
-	        value = '';
-	        for (var i in _entityIDs) {
-	          var entity = context.hasEntity(_entityIDs[i]);
-	          if (entity.tags.name) {
-	            value = entity.tags.name;
-	            break;
-	          }
-	        }
-	      }
-	      var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
-	      searchfn(language()[2], value, function (query, data) {
-	        callback( data.map(function (d) { return ({ value: d }); }) );
-	      });
-	    });
+	  popover.destroyAny = function (selection) {
+	    selection.call(popover.destroy, '.popover');
+	  };
 
+	  function setup() {
+	    var anchor = select(this);
 
-	  function wiki(selection) {
-	    var wrap = selection.selectAll('.form-field-input-wrap')
-	      .data([0]);
+	    var animate = _animation.apply(this, arguments);
 
-	    wrap = wrap.enter()
-	      .append('div')
-	      .attr('class', ("form-field-input-wrap form-field-input-" + (field.type)))
-	      .merge(wrap);
+	    var popoverSelection = anchor.selectAll('.popover-' + _id).data([0]);
+	    var enter = popoverSelection.enter().append('div').attr('class', 'popover popover-' + _id + ' ' + (klass ? klass : '')).classed('arrowed', _hasArrow.apply(this, arguments));
+	    enter.append('div').attr('class', 'popover-arrow');
+	    enter.append('div').attr('class', 'popover-inner');
+	    popoverSelection = enter.merge(popoverSelection);
 
+	    if (animate) {
+	      popoverSelection.classed('fade', true);
+	    }
 
-	    var langContainer = wrap.selectAll('.wiki-lang-container')
-	      .data([0]);
+	    var display = _displayType.apply(this, arguments);
 
-	    langContainer = langContainer.enter()
-	      .append('div')
-	      .attr('class', 'wiki-lang-container')
-	      .merge(langContainer);
+	    if (display === 'hover') {
+	      var _lastNonMouseEnterTime;
 
+	      anchor.on(_pointerPrefix + 'enter.popover', function (d3_event) {
+	        if (d3_event.pointerType) {
+	          if (d3_event.pointerType !== 'mouse') {
+	            _lastNonMouseEnterTime = d3_event.timeStamp; // only allow hover behavior for mouse input
 
-	    _langInput = langContainer.selectAll('input.wiki-lang')
-	      .data([0]);
+	            return;
+	          } else if (_lastNonMouseEnterTime && d3_event.timeStamp - _lastNonMouseEnterTime < 1500) {
+	            // HACK: iOS 13.4 sends an erroneous `mouse` type pointerenter
+	            // event for non-mouse interactions right after sending
+	            // the correct type pointerenter event. Workaround by discarding
+	            // any mouse event that occurs immediately after a non-mouse event.
+	            return;
+	          }
+	        } // don't show if buttons are pressed, e.g. during click and drag of map
+
+
+	        if (d3_event.buttons !== 0) return;
+	        show.apply(this, arguments);
+	      }).on(_pointerPrefix + 'leave.popover', function () {
+	        hide.apply(this, arguments);
+	      }) // show on focus too for better keyboard navigation support
+	      .on('focus.popover', function () {
+	        show.apply(this, arguments);
+	      }).on('blur.popover', function () {
+	        hide.apply(this, arguments);
+	      });
+	    } else if (display === 'clickFocus') {
+	      anchor.on(_pointerPrefix + 'down.popover', function (d3_event) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	      }).on(_pointerPrefix + 'up.popover', function (d3_event) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	      }).on('click.popover', toggle);
+	      popoverSelection // This attribute lets the popover take focus
+	      .attr('tabindex', 0).on('blur.popover', function () {
+	        anchor.each(function () {
+	          hide.apply(this, arguments);
+	        });
+	      });
+	    }
+	  }
 
-	    _langInput = _langInput.enter()
-	      .append('input')
-	      .attr('type', 'text')
-	      .attr('class', 'wiki-lang')
-	      .attr('placeholder', _t('translate.localized_translation_language'))
-	      .call(utilNoAuto)
-	      .call(langCombo)
-	      .merge(_langInput);
+	  function show() {
+	    var anchor = select(this);
+	    var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-	    utilGetSetValue(_langInput, language()[1]);
+	    if (popoverSelection.empty()) {
+	      // popover was removed somehow, put it back
+	      anchor.call(popover.destroy);
+	      anchor.each(setup);
+	      popoverSelection = anchor.selectAll('.popover-' + _id);
+	    }
 
-	    _langInput
-	      .on('blur', changeLang)
-	      .on('change', changeLang);
+	    popoverSelection.classed('in', true);
 
+	    var displayType = _displayType.apply(this, arguments);
 
-	    var titleContainer = wrap.selectAll('.wiki-title-container')
-	      .data([0]);
+	    if (displayType === 'clickFocus') {
+	      anchor.classed('active', true);
+	      popoverSelection.node().focus();
+	    }
 
-	    titleContainer = titleContainer.enter()
-	      .append('div')
-	      .attr('class', 'wiki-title-container')
-	      .merge(titleContainer);
+	    anchor.each(updateContent);
+	  }
 
-	    _titleInput = titleContainer.selectAll('input.wiki-title')
-	      .data([0]);
+	  function updateContent() {
+	    var anchor = select(this);
 
-	    _titleInput = _titleInput.enter()
-	      .append('input')
-	      .attr('type', 'text')
-	      .attr('class', 'wiki-title')
-	      .attr('id', field.domId)
-	      .call(utilNoAuto)
-	      .call(titleCombo)
-	      .merge(_titleInput);
+	    if (_content) {
+	      anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
+	    }
 
-	    _titleInput
-	      .on('blur', blur)
-	      .on('change', change);
+	    updatePosition.apply(this, arguments); // hack: update multiple times to fix instances where the absolute offset is
+	    // set before the dynamic popover size is calculated by the browser
 
+	    updatePosition.apply(this, arguments);
+	    updatePosition.apply(this, arguments);
+	  }
 
-	    var link = titleContainer.selectAll('.wiki-link')
-	      .data([0]);
+	  function updatePosition() {
+	    var anchor = select(this);
+	    var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-	    link = link.enter()
-	      .append('button')
-	      .attr('class', 'form-field-button wiki-link')
-	      .attr('tabindex', -1)
-	      .attr('title', _t('icons.view_on', { domain: 'wikipedia.org' }))
-	      .call(svgIcon('#iD-icon-out-link'))
-	      .merge(link);
+	    var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
 
-	    link
-	      .on('click', function () {
-	        event.preventDefault();
-	        if (_wikiURL) { window.open(_wikiURL, '_blank'); }
-	      });
-	  }
+	    var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
+	    var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
+	    var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
 
+	    var placement = _placement.apply(this, arguments);
 
-	  function language() {
-	    var value = utilGetSetValue(_langInput).toLowerCase();
-	    var locale = _mainLocalizer.localeCode().toLowerCase();
-	    var localeLanguage;
-	    return _dataWikipedia.find(function (d) {
-	      if (d[2] === locale) { localeLanguage = d; }
-	      return d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value;
-	    }) || localeLanguage || ['English', 'English', 'en'];
-	  }
+	    popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);
 
+	    var alignment = _alignment.apply(this, arguments);
 
-	  function changeLang() {
-	    utilGetSetValue(_langInput, language()[1]);
-	    change(true);
-	  }
+	    var alignFactor = 0.5;
 
+	    if (alignment === 'leading') {
+	      alignFactor = 0;
+	    } else if (alignment === 'trailing') {
+	      alignFactor = 1;
+	    }
 
-	  function blur() {
-	    change(true);
-	  }
+	    var anchorFrame = getFrame(anchor.node());
+	    var popoverFrame = getFrame(popoverSelection.node());
+	    var position;
 
+	    switch (placement) {
+	      case 'top':
+	        position = {
+	          x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+	          y: anchorFrame.y - popoverFrame.h
+	        };
+	        break;
 
-	  function change(skipWikidata) {
-	    var value = utilGetSetValue(_titleInput);
-	    var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
-	    var l = m && _dataWikipedia.find(function (d) { return m[1] === d[2]; });
-	    var syncTags = {};
+	      case 'bottom':
+	        position = {
+	          x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+	          y: anchorFrame.y + anchorFrame.h
+	        };
+	        break;
 
-	    if (l) {
-	      // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
-	      value = decodeURIComponent(m[2]).replace(/_/g, ' ');
-	      if (m[3]) {
-	        var anchor;
-	        // try {
-	        // leave this out for now - #6232
-	          // Best-effort `anchordecode:` implementation
-	          // anchor = decodeURIComponent(m[3].replace(/\.([0-9A-F]{2})/g, '%$1'));
-	        // } catch (e) {
-	        anchor = decodeURIComponent(m[3]);
-	        // }
-	        value += '#' + anchor.replace(/_/g, ' ');
-	      }
-	      value = value.slice(0, 1).toUpperCase() + value.slice(1);
-	      utilGetSetValue(_langInput, l[1]);
-	      utilGetSetValue(_titleInput, value);
-	    }
+	      case 'left':
+	        position = {
+	          x: anchorFrame.x - popoverFrame.w,
+	          y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+	        };
+	        break;
 
-	    if (value) {
-	      syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
-	    } else {
-	      syncTags.wikipedia = undefined;
+	      case 'right':
+	        position = {
+	          x: anchorFrame.x + anchorFrame.w,
+	          y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+	        };
+	        break;
 	    }
 
-	    dispatch$1.call('change', this, syncTags);
-
+	    if (position) {
+	      if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+	        var initialPosX = position.x;
 
-	    if (skipWikidata || !value || !language()[2]) { return; }
+	        if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
+	          position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
+	        } else if (position.x < 10) {
+	          position.x = 10;
+	        }
 
-	    // attempt asynchronous update of wikidata tag..
-	    var initGraph = context.graph();
-	    var initEntityIDs = _entityIDs;
+	        var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible
 
-	    wikidata.itemsByTitle(language()[2], value, function (err, data) {
-	      if (err || !data || !Object.keys(data).length) { return; }
+	        var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
+	        arrow.style('left', ~~arrowPosX + 'px');
+	      }
 
-	      // If graph has changed, we can't apply this update.
-	      if (context.graph() !== initGraph) { return; }
+	      popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
+	    } else {
+	      popoverSelection.style('left', null).style('top', null);
+	    }
 
-	      var qids = Object.keys(data);
-	      var value = qids && qids.find(function (id) { return id.match(/^Q\d+$/); });
+	    function getFrame(node) {
+	      var positionStyle = select(node).style('position');
 
-	      var actions = initEntityIDs.map(function (entityID) {
-	        var entity = context.entity(entityID).tags;
-	        var currTags = Object.assign({}, entity);  // shallow copy
-	        if (currTags.wikidata !== value) {
-	            currTags.wikidata = value;
-	            return actionChangeTags(entityID, currTags);
-	        }
-	      }).filter(Boolean);
+	      if (positionStyle === 'absolute' || positionStyle === 'static') {
+	        return {
+	          x: node.offsetLeft - scrollLeft,
+	          y: node.offsetTop - scrollTop,
+	          w: node.offsetWidth,
+	          h: node.offsetHeight
+	        };
+	      } else {
+	        return {
+	          x: 0,
+	          y: 0,
+	          w: node.offsetWidth,
+	          h: node.offsetHeight
+	        };
+	      }
+	    }
+	  }
 
-	      if (!actions.length) { return; }
+	  function hide() {
+	    var anchor = select(this);
 
-	      // Coalesce the update of wikidata tag into the previous tag change
-	      context.overwrite(
-	        function actionUpdateWikidataTags(graph) {
-	          actions.forEach(function(action) {
-	            graph = action(graph);
-	          });
-	          return graph;
-	        },
-	        context.history().undoAnnotation()
-	      );
+	    if (_displayType.apply(this, arguments) === 'clickFocus') {
+	      anchor.classed('active', false);
+	    }
 
-	      // do not dispatch.call('change') here, because entity_editor
-	      // changeTags() is not intended to be called asynchronously
-	    });
+	    anchor.selectAll('.popover-' + _id).classed('in', false);
 	  }
 
+	  function toggle() {
+	    if (select(this).select('.popover-' + _id).classed('in')) {
+	      hide.apply(this, arguments);
+	    } else {
+	      show.apply(this, arguments);
+	    }
+	  }
 
-	  wiki.tags = function (tags) {
-	    _tags = tags;
-	    updateForTags(tags);
-	  };
-
-	  function updateForTags(tags) {
+	  return popover;
+	}
 
-	    var value = typeof tags[field.key] === 'string' ? tags[field.key] : '';
-	    var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
-	    var l = m && _dataWikipedia.find(function (d) { return m[1] === d[2]; });
-	    var anchor = m && m[3];
+	function uiTooltip(klass) {
+	  var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');
 
-	    // value in correct format
-	    if (l) {
-	      utilGetSetValue(_langInput, l[1]);
-	      utilGetSetValue(_titleInput, m[2] + (anchor ? ('#' + anchor) : ''));
-	      if (anchor) {
-	        try {
-	          // Best-effort `anchorencode:` implementation
-	          anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
-	        } catch (e) {
-	          anchor = anchor.replace(/ /g, '_');
-	        }
-	      }
-	      _wikiURL = 'https://' + m[1] + '.wikipedia.org/wiki/' +
-	        m[2].replace(/ /g, '_') + (anchor ? ('#' + anchor) : '');
+	  var _title = function _title() {
+	    var title = this.getAttribute('data-original-title');
 
-	    // unrecognized value format
+	    if (title) {
+	      return title;
 	    } else {
-	      utilGetSetValue(_titleInput, value);
-	      if (value && value !== '') {
-	        utilGetSetValue(_langInput, '');
-	        _wikiURL = "https://en.wikipedia.org/wiki/Special:Search?search=" + value;
-	      } else {
-	        _wikiURL = '';
-	      }
+	      title = this.getAttribute('title');
+	      this.removeAttribute('title');
+	      this.setAttribute('data-original-title', title);
 	    }
-	  }
-
 
-	  wiki.entityIDs = function (val) {
-	    if (!arguments$1.length) { return _entityIDs; }
-	    _entityIDs = val;
-	    return wiki;
+	    return title;
 	  };
 
+	  var _heading = utilFunctor(null);
 
-	  wiki.focus = function () {
-	    _titleInput.node().focus();
+	  var _keys = utilFunctor(null);
+
+	  tooltip.title = function (val) {
+	    if (!arguments.length) return _title;
+	    _title = utilFunctor(val);
+	    return tooltip;
+	  };
+
+	  tooltip.heading = function (val) {
+	    if (!arguments.length) return _heading;
+	    _heading = utilFunctor(val);
+	    return tooltip;
 	  };
 
+	  tooltip.keys = function (val) {
+	    if (!arguments.length) return _keys;
+	    _keys = utilFunctor(val);
+	    return tooltip;
+	  };
 
-	  return utilRebind(wiki, dispatch$1, 'on');
-	}
+	  tooltip.content(function () {
+	    var heading = _heading.apply(this, arguments);
 
-	uiFieldWikipedia.supportsMultiselection = false;
+	    var text = _title.apply(this, arguments);
 
-	var uiFields = {
-	    access: uiFieldAccess,
-	    address: uiFieldAddress,
-	    check: uiFieldCheck,
-	    combo: uiFieldCombo,
-	    cycleway: uiFieldCycleway,
-	    defaultCheck: uiFieldCheck,
-	    email: uiFieldText,
-	    identifier: uiFieldText,
-	    lanes: uiFieldLanes,
-	    localized: uiFieldLocalized,
-	    maxspeed: uiFieldMaxspeed,
-	    multiCombo: uiFieldCombo,
-	    networkCombo: uiFieldCombo,
-	    number: uiFieldText,
-	    onewayCheck: uiFieldCheck,
-	    radio: uiFieldRadio,
-	    restrictions: uiFieldRestrictions,
-	    semiCombo: uiFieldCombo,
-	    structureRadio: uiFieldRadio,
-	    tel: uiFieldText,
-	    text: uiFieldText,
-	    textarea: uiFieldTextarea,
-	    typeCombo: uiFieldCombo,
-	    url: uiFieldText,
-	    wikidata: uiFieldWikidata,
-	    wikipedia: uiFieldWikipedia
-	};
+	    var keys = _keys.apply(this, arguments);
 
-	function uiField(context, presetField, entityIDs, options) {
-	    options = Object.assign({
-	        show: true,
-	        wrap: true,
-	        remove: true,
-	        revert: true,
-	        info: true
-	    }, options);
+	    return function (selection) {
+	      var headingSelect = selection.selectAll('.tooltip-heading').data(heading ? [heading] : []);
+	      headingSelect.exit().remove();
+	      headingSelect.enter().append('div').attr('class', 'tooltip-heading').merge(headingSelect).html(heading);
+	      var textSelect = selection.selectAll('.tooltip-text').data(text ? [text] : []);
+	      textSelect.exit().remove();
+	      textSelect.enter().append('div').attr('class', 'tooltip-text').merge(textSelect).html(text);
+	      var keyhintWrap = selection.selectAll('.keyhint-wrap').data(keys && keys.length ? [0] : []);
+	      keyhintWrap.exit().remove();
+	      var keyhintWrapEnter = keyhintWrap.enter().append('div').attr('class', 'keyhint-wrap');
+	      keyhintWrapEnter.append('span').html(_t.html('tooltip_keyhint'));
+	      keyhintWrap = keyhintWrapEnter.merge(keyhintWrap);
+	      keyhintWrap.selectAll('kbd.shortcut').data(keys && keys.length ? keys : []).enter().append('kbd').attr('class', 'shortcut').html(function (d) {
+	        return d;
+	      });
+	    };
+	  });
+	  return tooltip;
+	}
 
-	    var dispatch$1 = dispatch('change', 'revert');
-	    var field = Object.assign({}, presetField);   // shallow copy
-	    field.domId = utilUniqueDomId('form-field-' + field.safeid);
-	    var _show = options.show;
-	    var _state = '';
-	    var _tags = {};
+	function uiEditMenu(context) {
+	  var dispatch$1 = dispatch('toggled');
 
-	    var _locked = false;
-	    var _lockedTip = uiTooltip()
-	        .title(_t('inspector.lock.suggestion', { label: field.label }))
-	        .placement('bottom');
+	  var _menu = select(null);
 
+	  var _operations = []; // the position the menu should be displayed relative to
 
-	    field.keys = field.keys || [field.key];
+	  var _anchorLoc = [0, 0];
+	  var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened
 
-	    // only create the fields that are actually being shown
-	    if (_show && !field.impl) {
-	        createField();
-	    }
+	  var _triggerType = '';
+	  var _vpTopMargin = 85; // viewport top margin
 
-	    // Creates the field.. This is done lazily,
-	    // once we know that the field will be shown.
-	    function createField() {
-	        field.impl = uiFields[field.type](field, context)
-	            .on('change', function(t, onInput) {
-	                dispatch$1.call('change', field, t, onInput);
-	            });
+	  var _vpBottomMargin = 45; // viewport bottom margin
 
-	        if (entityIDs) {
-	            field.entityIDs = entityIDs;
-	            // if this field cares about the entities, pass them along
-	            if (field.impl.entityIDs) {
-	                field.impl.entityIDs(entityIDs);
-	            }
-	        }
-	    }
+	  var _vpSideMargin = 35; // viewport side margin
 
+	  var _menuTop = false;
 
-	    function isModified() {
-	        if (!entityIDs || !entityIDs.length) { return false; }
-	        return entityIDs.some(function(entityID) {
-	            var original = context.graph().base().entities[entityID];
-	            var latest = context.graph().entity(entityID);
-	            return field.keys.some(function(key) {
-	                return original ? latest.tags[key] !== original.tags[key] : latest.tags[key];
-	            });
-	        });
-	    }
+	  var _menuHeight;
 
+	  var _menuWidth; // hardcode these values to make menu positioning easier
 
-	    function tagsContainFieldKey() {
-	        return field.keys.some(function(key) {
-	            if (field.type === 'multiCombo') {
-	                for (var tagKey in _tags) {
-	                    if (tagKey.indexOf(key) === 0) {
-	                        return true;
-	                    }
-	                }
-	                return false;
-	            }
-	            return _tags[key] !== undefined;
-	        });
-	    }
 
+	  var _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin
 
-	    function revert(d) {
-	        event.stopPropagation();
-	        event.preventDefault();
-	        if (!entityIDs || _locked) { return; }
+	  var _tooltipWidth = 210; // offset the menu slightly from the target location
 
-	        dispatch$1.call('revert', d, d.keys);
-	    }
+	  var _menuSideMargin = 10;
+	  var _tooltips = [];
 
+	  var editMenu = function editMenu(selection) {
+	    var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
 
-	    function remove(d) {
-	        event.stopPropagation();
-	        event.preventDefault();
-	        if (_locked) { return; }
+	    var ops = _operations.filter(function (op) {
+	      return !isTouchMenu || !op.mouseOnly;
+	    });
 
-	        var t = {};
-	        d.keys.forEach(function(key) {
-	            t[key] = undefined;
-	        });
+	    if (!ops.length) return;
+	    _tooltips = []; // Position the menu above the anchor for stylus and finger input
+	    // since the mapper's hand likely obscures the screen below the anchor
 
-	        dispatch$1.call('change', d, t);
-	    }
+	    _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips
 
+	    var showLabels = isTouchMenu;
+	    var buttonHeight = showLabels ? 32 : 34;
 
-	    field.render = function(selection) {
-	        var container = selection.selectAll('.form-field')
-	            .data([field]);
+	    if (showLabels) {
+	      // Get a general idea of the width based on the length of the label
+	      _menuWidth = 52 + Math.min(120, 6 * Math.max.apply(Math, ops.map(function (op) {
+	        return op.title.length;
+	      })));
+	    } else {
+	      _menuWidth = 44;
+	    }
 
-	        // Enter
-	        var enter = container.enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'form-field form-field-' + d.safeid; })
-	            .classed('nowrap', !options.wrap);
-
-	        if (options.wrap) {
-	            var labelEnter = enter
-	                .append('label')
-	                .attr('class', 'field-label')
-	                .attr('for', function(d) { return d.domId; });
-
-	            var textEnter = labelEnter
-	                .append('span')
-	                .attr('class', 'label-text');
-
-	            textEnter
-	                .append('span')
-	                .attr('class', 'label-textvalue')
-	                .text(function(d) { return d.label(); });
-
-	            textEnter
-	                .append('span')
-	                .attr('class', 'label-textannotation');
-
-	            if (options.remove) {
-	                labelEnter
-	                    .append('button')
-	                    .attr('class', 'remove-icon')
-	                    .attr('title', _t('icons.remove'))
-	                    .attr('tabindex', -1)
-	                    .call(svgIcon('#iD-operation-delete'));
-	            }
+	    _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+	    _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
 
-	            if (options.revert) {
-	                labelEnter
-	                    .append('button')
-	                    .attr('class', 'modified-icon')
-	                    .attr('title', _t('icons.undo'))
-	                    .attr('tabindex', -1)
-	                    .call(svgIcon((_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-redo' : '#iD-icon-undo'));
-	            }
-	        }
+	    var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter
 
 
-	        // Update
-	        container = container
-	            .merge(enter);
+	    var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+	      return 'edit-menu-item edit-menu-item-' + d.id;
+	    }).style('height', buttonHeight + 'px').on('click', click) // don't listen for `mouseup` because we only care about non-mouse pointer types
+	    .on('pointerup', pointerup).on('pointerdown mousedown', function pointerdown(d3_event) {
+	      // don't let button presses also act as map input - #1869
+	      d3_event.stopPropagation();
+	    }).on('mouseenter.highlight', function (d3_event, d) {
+	      if (!d.relatedEntityIds || select(this).classed('disabled')) return;
+	      utilHighlightEntities(d.relatedEntityIds(), true, context);
+	    }).on('mouseleave.highlight', function (d3_event, d) {
+	      if (!d.relatedEntityIds) return;
+	      utilHighlightEntities(d.relatedEntityIds(), false, context);
+	    });
+	    buttonsEnter.each(function (d) {
+	      var tooltip = uiTooltip().heading(d.title).title(d.tooltip()).keys([d.keys[0]]);
 
-	        container.select('.field-label > .remove-icon')  // propagate bound data
-	            .on('click', remove);
+	      _tooltips.push(tooltip);
 
-	        container.select('.field-label > .modified-icon')  // propagate bound data
-	            .on('click', revert);
+	      select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon('#iD-operation-' + d.id, 'operation'));
+	    });
 
-	        container
-	            .each(function(d) {
-	                var selection = select(this);
+	    if (showLabels) {
+	      buttonsEnter.append('span').attr('class', 'label').html(function (d) {
+	        return d.title;
+	      });
+	    } // update
 
-	                if (!d.impl) {
-	                    createField();
-	                }
 
-	                var reference, help;
+	    buttonsEnter.merge(buttons).classed('disabled', function (d) {
+	      return d.disabled();
+	    });
+	    updatePosition();
+	    var initialScale = context.projection.scale();
+	    context.map().on('move.edit-menu', function () {
+	      if (initialScale !== context.projection.scale()) {
+	        editMenu.close();
+	      }
+	    }).on('drawn.edit-menu', function (info) {
+	      if (info.full) updatePosition();
+	    });
+	    var lastPointerUpType; // `pointerup` is always called before `click`
 
-	                // instantiate field help
-	                if (options.wrap && field.type === 'restrictions') {
-	                    help = uiFieldHelp(context, 'restrictions');
-	                }
+	    function pointerup(d3_event) {
+	      lastPointerUpType = d3_event.pointerType;
+	    }
 
-	                // instantiate tag reference
-	                if (options.wrap && options.info) {
-	                    var referenceKey = d.key;
-	                    if (d.type === 'multiCombo') {   // lookup key without the trailing ':'
-	                        referenceKey = referenceKey.replace(/:$/, '');
-	                    }
+	    function click(d3_event, operation) {
+	      d3_event.stopPropagation();
 
-	                    reference = uiTagReference(d.reference || { key: referenceKey });
-	                    if (_state === 'hover') {
-	                        reference.showing(false);
-	                    }
-	                }
+	      if (operation.relatedEntityIds) {
+	        utilHighlightEntities(operation.relatedEntityIds(), false, context);
+	      }
 
-	                selection
-	                    .call(d.impl);
+	      if (operation.disabled()) {
+	        if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+	          // there are no tooltips for touch interactions so flash feedback instead
+	          context.ui().flash.duration(4000).iconName('#iD-operation-' + operation.id).iconClass('operation disabled').label(operation.tooltip)();
+	        }
+	      } else {
+	        if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+	          context.ui().flash.duration(2000).iconName('#iD-operation-' + operation.id).iconClass('operation').label(operation.annotation() || operation.title)();
+	        }
 
-	                // add field help components
-	                if (help) {
-	                    selection
-	                        .call(help.body)
-	                        .select('.field-label')
-	                        .call(help.button);
-	                }
+	        operation();
+	        editMenu.close();
+	      }
 
-	                // add tag reference components
-	                if (reference) {
-	                    selection
-	                        .call(reference.body)
-	                        .select('.field-label')
-	                        .call(reference.button);
-	                }
+	      lastPointerUpType = null;
+	    }
 
-	                d.impl.tags(_tags);
-	            });
+	    dispatch$1.call('toggled', this, true);
+	  };
 
+	  function updatePosition() {
+	    if (!_menu || _menu.empty()) return;
+	    var anchorLoc = context.projection(_anchorLocLonLat);
+	    var viewport = context.surfaceRect();
 
-	            container
-	                .classed('locked', _locked)
-	                .classed('modified', isModified())
-	                .classed('present', tagsContainFieldKey());
+	    if (anchorLoc[0] < 0 || anchorLoc[0] > viewport.width || anchorLoc[1] < 0 || anchorLoc[1] > viewport.height) {
+	      // close the menu if it's gone offscreen
+	      editMenu.close();
+	      return;
+	    }
 
+	    var menuLeft = displayOnLeft(viewport);
+	    var offset = [0, 0];
+	    offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
 
-	            // show a tip and lock icon if the field is locked
-	            var annotation = container.selectAll('.field-label .label-textannotation');
-	            var icon = annotation.selectAll('.icon')
-	                .data(_locked ? [0]: []);
+	    if (_menuTop) {
+	      if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
+	        // menu is near top viewport edge, shift downward
+	        offset[1] = -anchorLoc[1] + _vpTopMargin;
+	      } else {
+	        offset[1] = -_menuHeight;
+	      }
+	    } else {
+	      if (anchorLoc[1] + _menuHeight > viewport.height - _vpBottomMargin) {
+	        // menu is near bottom viewport edge, shift upwards
+	        offset[1] = -anchorLoc[1] - _menuHeight + viewport.height - _vpBottomMargin;
+	      } else {
+	        offset[1] = 0;
+	      }
+	    }
 
-	            icon.exit()
-	                .remove();
+	    var origin = geoVecAdd(anchorLoc, offset);
 
-	            icon.enter()
-	                .append('svg')
-	                .attr('class', 'icon')
-	                .append('use')
-	                .attr('xlink:href', '#fas-lock');
+	    _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');
 
-	            container.call(_locked ? _lockedTip : _lockedTip.destroy);
-	    };
+	    var tooltipSide = tooltipPosition(viewport, menuLeft);
 
+	    _tooltips.forEach(function (tooltip) {
+	      tooltip.placement(tooltipSide);
+	    });
 
-	    field.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return field;
-	    };
+	    function displayOnLeft(viewport) {
+	      if (_mainLocalizer.textDirection() === 'ltr') {
+	        if (anchorLoc[0] + _menuSideMargin + _menuWidth > viewport.width - _vpSideMargin) {
+	          // right menu would be too close to the right viewport edge, go left
+	          return true;
+	        } // prefer right menu
 
 
-	    field.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
+	        return false;
+	      } else {
+	        // rtl
+	        if (anchorLoc[0] - _menuSideMargin - _menuWidth < _vpSideMargin) {
+	          // left menu would be too close to the left viewport edge, go right
+	          return false;
+	        } // prefer left menu
 
-	        if (tagsContainFieldKey() && !_show) {
-	            // always show a field if it has a value to display
-	            _show = true;
-	            if (!field.impl) {
-	                createField();
-	            }
-	        }
 
-	        return field;
-	    };
+	        return true;
+	      }
+	    }
 
+	    function tooltipPosition(viewport, menuLeft) {
+	      if (_mainLocalizer.textDirection() === 'ltr') {
+	        if (menuLeft) {
+	          // if there's not room for a right-side menu then there definitely
+	          // isn't room for right-side tooltips
+	          return 'left';
+	        }
 
-	    field.locked = function(val) {
-	        if (!arguments.length) { return _locked; }
-	        _locked = val;
-	        return field;
-	    };
+	        if (anchorLoc[0] + _menuSideMargin + _menuWidth + _tooltipWidth > viewport.width - _vpSideMargin) {
+	          // right tooltips would be too close to the right viewport edge, go left
+	          return 'left';
+	        } // prefer right tooltips
 
 
-	    field.show = function() {
-	        _show = true;
-	        if (!field.impl) {
-	            createField();
-	        }
-	        if (field.default && field.key && _tags[field.key] !== field.default) {
-	            var t = {};
-	            t[field.key] = field.default;
-	            dispatch$1.call('change', this, t);
+	        return 'right';
+	      } else {
+	        // rtl
+	        if (!menuLeft) {
+	          return 'right';
 	        }
-	    };
 
-	    // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
-	    field.isShown = function() {
-	        return _show;
-	    };
+	        if (anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth < _vpSideMargin) {
+	          // left tooltips would be too close to the left viewport edge, go right
+	          return 'right';
+	        } // prefer left tooltips
 
 
-	    // An allowed field can appear in the UI or in the 'Add field' dropdown.
-	    // A non-allowed field is hidden from the user altogether
-	    field.isAllowed = function() {
+	        return 'left';
+	      }
+	    }
+	  }
 
-	        if (entityIDs &&
-	            entityIDs.length > 1 &&
-	            uiFields[field.type].supportsMultiselection === false) { return false; }
+	  editMenu.close = function () {
+	    context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);
 
-	        if (field.geometry && !entityIDs.every(function(entityID) {
-	            return field.matchGeometry(context.graph().geometry(entityID));
-	        })) { return false; }
+	    _menu.remove();
 
-	        if (field.countryCodes || field.notCountryCodes) {
-	            var extent = combinedEntityExtent();
-	            if (!extent) { return true; }
+	    _tooltips = [];
+	    dispatch$1.call('toggled', this, false);
+	  };
 
-	            var center = extent.center();
-	            var countryCode = iso1A2Code(center);
+	  editMenu.anchorLoc = function (val) {
+	    if (!arguments.length) return _anchorLoc;
+	    _anchorLoc = val;
+	    _anchorLocLonLat = context.projection.invert(_anchorLoc);
+	    return editMenu;
+	  };
 
-	            if (!countryCode) { return false; }
+	  editMenu.triggerType = function (val) {
+	    if (!arguments.length) return _triggerType;
+	    _triggerType = val;
+	    return editMenu;
+	  };
 
-	            countryCode = countryCode.toLowerCase();
+	  editMenu.operations = function (val) {
+	    if (!arguments.length) return _operations;
+	    _operations = val;
+	    return editMenu;
+	  };
 
-	            if (field.countryCodes && field.countryCodes.indexOf(countryCode) === -1) {
-	                return false;
-	            }
-	            if (field.notCountryCodes && field.notCountryCodes.indexOf(countryCode) !== -1) {
-	                return false;
-	            }
-	        }
+	  return utilRebind(editMenu, dispatch$1, 'on');
+	}
 
-	        var prerequisiteTag = field.prerequisiteTag;
+	function uiFeatureInfo(context) {
+	  function update(selection) {
+	    var features = context.features();
+	    var stats = features.stats();
+	    var count = 0;
+	    var hiddenList = features.hidden().map(function (k) {
+	      if (stats[k]) {
+	        count += stats[k];
+	        return _t('inspector.title_count', {
+	          title: _t.html('feature.' + k + '.description'),
+	          count: stats[k]
+	        });
+	      }
 
-	        if (entityIDs &&
-	            !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
-	            prerequisiteTag) {
+	      return null;
+	    }).filter(Boolean);
+	    selection.html('');
 
-	            if (!entityIDs.every(function(entityID) {
-	                var entity = context.graph().entity(entityID);
-	                if (prerequisiteTag.key) {
-	                    var value = entity.tags[prerequisiteTag.key];
-	                    if (!value) { return false; }
+	    if (hiddenList.length) {
+	      var tooltipBehavior = uiTooltip().placement('top').title(function () {
+	        return hiddenList.join('<br/>');
+	      });
+	      selection.append('a').attr('class', 'chip').attr('href', '#').html(_t.html('feature_info.hidden_warning', {
+	        count: count
+	      })).call(tooltipBehavior).on('click', function (d3_event) {
+	        tooltipBehavior.hide();
+	        d3_event.preventDefault(); // open the Map Data pane
 
-	                    if (prerequisiteTag.valueNot) {
-	                        return prerequisiteTag.valueNot !== value;
-	                    }
-	                    if (prerequisiteTag.value) {
-	                        return prerequisiteTag.value === value;
-	                    }
-	                } else if (prerequisiteTag.keyNot) {
-	                    if (entity.tags[prerequisiteTag.keyNot]) { return false; }
-	                }
-	                return true;
-	            })) { return false; }
-	        }
+	        context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
+	      });
+	    }
 
-	        return true;
-	    };
+	    selection.classed('hide', !hiddenList.length);
+	  }
 
+	  return function (selection) {
+	    update(selection);
+	    context.features().on('change.feature_info', function () {
+	      update(selection);
+	    });
+	  };
+	}
 
-	    field.focus = function() {
-	        if (field.impl) {
-	            field.impl.focus();
-	        }
-	    };
+	function uiFlash(context) {
+	  var _flashTimer;
+
+	  var _duration = 2000;
+	  var _iconName = '#iD-icon-no';
+	  var _iconClass = 'disabled';
+	  var _label = '';
+
+	  function flash() {
+	    if (_flashTimer) {
+	      _flashTimer.stop();
+	    }
+
+	    context.container().select('.main-footer-wrap').classed('footer-hide', true).classed('footer-show', false);
+	    context.container().select('.flash-wrap').classed('footer-hide', false).classed('footer-show', true);
+	    var content = context.container().select('.flash-wrap').selectAll('.flash-content').data([0]); // Enter
+
+	    var contentEnter = content.enter().append('div').attr('class', 'flash-content');
+	    var iconEnter = contentEnter.append('svg').attr('class', 'flash-icon icon').append('g').attr('transform', 'translate(10,10)');
+	    iconEnter.append('circle').attr('r', 9);
+	    iconEnter.append('use').attr('transform', 'translate(-7,-7)').attr('width', '14').attr('height', '14');
+	    contentEnter.append('div').attr('class', 'flash-text'); // Update
+
+	    content = content.merge(contentEnter);
+	    content.selectAll('.flash-icon').attr('class', 'icon flash-icon ' + (_iconClass || ''));
+	    content.selectAll('.flash-icon use').attr('xlink:href', _iconName);
+	    content.selectAll('.flash-text').attr('class', 'flash-text').html(_label);
+	    _flashTimer = d3_timeout(function () {
+	      _flashTimer = null;
+	      context.container().select('.main-footer-wrap').classed('footer-hide', false).classed('footer-show', true);
+	      context.container().select('.flash-wrap').classed('footer-hide', true).classed('footer-show', false);
+	    }, _duration);
+	    return content;
+	  }
+
+	  flash.duration = function (_) {
+	    if (!arguments.length) return _duration;
+	    _duration = _;
+	    return flash;
+	  };
 
+	  flash.label = function (_) {
+	    if (!arguments.length) return _label;
+	    _label = _;
+	    return flash;
+	  };
 
-	    function combinedEntityExtent() {
-	        return entityIDs && entityIDs.length && entityIDs.reduce(function(extent, entityID) {
-	            var entity = context.graph().entity(entityID);
-	            return extent.extend(entity.extent(context.graph()));
-	        }, geoExtent());
-	    }
+	  flash.iconName = function (_) {
+	    if (!arguments.length) return _iconName;
+	    _iconName = _;
+	    return flash;
+	  };
 
+	  flash.iconClass = function (_) {
+	    if (!arguments.length) return _iconClass;
+	    _iconClass = _;
+	    return flash;
+	  };
 
-	    return utilRebind(field, dispatch$1, 'on');
+	  return flash;
 	}
 
-	function uiFormFields(context) {
-	    var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
-	    var _fieldsArr = [];
-	    var _lastPlaceholder = '';
-	    var _state = '';
-	    var _klass = '';
+	function uiFullScreen(context) {
+	  var element = context.container().node(); // var button = d3_select(null);
 
+	  function getFullScreenFn() {
+	    if (element.requestFullscreen) {
+	      return element.requestFullscreen;
+	    } else if (element.msRequestFullscreen) {
+	      return element.msRequestFullscreen;
+	    } else if (element.mozRequestFullScreen) {
+	      return element.mozRequestFullScreen;
+	    } else if (element.webkitRequestFullscreen) {
+	      return element.webkitRequestFullscreen;
+	    }
+	  }
 
-	    function formFields(selection) {
-	        var allowedFields = _fieldsArr.filter(function(field) { return field.isAllowed(); });
-	        var shown = allowedFields.filter(function(field) { return field.isShown(); });
-	        var notShown = allowedFields.filter(function(field) { return !field.isShown(); });
+	  function getExitFullScreenFn() {
+	    if (document.exitFullscreen) {
+	      return document.exitFullscreen;
+	    } else if (document.msExitFullscreen) {
+	      return document.msExitFullscreen;
+	    } else if (document.mozCancelFullScreen) {
+	      return document.mozCancelFullScreen;
+	    } else if (document.webkitExitFullscreen) {
+	      return document.webkitExitFullscreen;
+	    }
+	  }
 
-	        var container = selection.selectAll('.form-fields-container')
-	            .data([0]);
+	  function isFullScreen() {
+	    return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
+	  }
 
-	        container = container.enter()
-	            .append('div')
-	            .attr('class', 'form-fields-container ' + (_klass || ''))
-	            .merge(container);
+	  function isSupported() {
+	    return !!getFullScreenFn();
+	  }
 
+	  function fullScreen(d3_event) {
+	    d3_event.preventDefault();
 
-	        var fields = container.selectAll('.wrap-form-field')
-	            .data(shown, function(d) { return d.id + (d.entityIDs ? d.entityIDs.join() : ''); });
+	    if (!isFullScreen()) {
+	      // button.classed('active', true);
+	      getFullScreenFn().apply(element);
+	    } else {
+	      // button.classed('active', false);
+	      getExitFullScreenFn().apply(document);
+	    }
+	  }
 
-	        fields.exit()
-	            .remove();
+	  return function () {
+	    // selection) {
+	    if (!isSupported()) return; // button = selection.append('button')
+	    //     .attr('title', t('full_screen'))
+	    //     .on('click', fullScreen)
+	    //     .call(tooltip);
+	    // button.append('span')
+	    //     .attr('class', 'icon full-screen');
 
-	        // Enter
-	        var enter = fields.enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'wrap-form-field wrap-form-field-' + d.safeid; });
+	    var detected = utilDetect();
+	    var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
+	    context.keybinding().on(keys, fullScreen);
+	  };
+	}
 
-	        // Update
-	        fields = fields
-	            .merge(enter);
+	function uiGeolocate(context) {
+	  var _geolocationOptions = {
+	    // prioritize speed and power usage over precision
+	    enableHighAccuracy: false,
+	    // don't hang indefinitely getting the location
+	    timeout: 6000 // 6sec
 
-	        fields
-	            .order()
-	            .each(function(d) {
-	                select(this)
-	                    .call(d.render);
-	            });
+	  };
 
+	  var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);
 
-	        var titles = [];
-	        var moreFields = notShown.map(function(field) {
-	            var label = field.label();
-	            titles.push(label);
+	  var _layer = context.layers().layer('geolocate');
 
-	            var terms = field.terms();
-	            if (field.key) { terms.push(field.key); }
-	            if (field.keys) { terms = terms.concat(field.keys); }
+	  var _position;
 
-	            return {
-	                title: label,
-	                value: label,
-	                field: field,
-	                terms: terms
-	            };
-	        });
+	  var _extent;
 
-	        var placeholder = titles.slice(0,3).join(', ') + ((titles.length > 3) ? '…' : '');
+	  var _timeoutID;
 
+	  var _button = select(null);
 
-	        var more = selection.selectAll('.more-fields')
-	            .data((_state === 'hover' || moreFields.length === 0) ? [] : [0]);
+	  function click() {
+	    if (context.inIntro()) return;
 
-	        more.exit()
-	            .remove();
+	    if (!_layer.enabled() && !_locating.isShown()) {
+	      // This timeout ensures that we still call finish() even if
+	      // the user declines to share their location in Firefox
+	      _timeoutID = setTimeout(error, 10000
+	      /* 10sec */
+	      );
+	      context.container().call(_locating); // get the latest position even if we already have one
 
-	        var moreEnter = more.enter()
-	            .append('div')
-	            .attr('class', 'more-fields')
-	            .append('label');
-
-	        moreEnter
-	            .append('span')
-	            .text(_t('inspector.add_fields'));
-
-	        more = moreEnter
-	            .merge(more);
-
-
-	        var input = more.selectAll('.value')
-	            .data([0]);
-
-	        input.exit()
-	            .remove();
-
-	        input = input.enter()
-	            .append('input')
-	            .attr('class', 'value')
-	            .attr('type', 'text')
-	            .attr('placeholder', placeholder)
-	            .call(utilNoAuto)
-	            .merge(input);
-
-	        input
-	            .call(utilGetSetValue, '')
-	            .call(moreCombo
-	                .data(moreFields)
-	                .on('accept', function (d) {
-	                    if (!d) { return; }  // user entered something that was not matched
-	                    var field = d.field;
-	                    field.show();
-	                    selection.call(formFields);  // rerender
-	                    if (field.type !== 'semiCombo' && field.type !== 'multiCombo') {
-	                        field.focus();
-	                    }
-	                })
-	            );
+	      navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
+	    } else {
+	      _locating.close();
 
-	        // avoid updating placeholder excessively (triggers style recalc)
-	        if (_lastPlaceholder !== placeholder) {
-	            input.attr('placeholder', placeholder);
-	            _lastPlaceholder = placeholder;
-	        }
-	    }
+	      _layer.enabled(null, false);
 
+	      updateButtonState();
+	    }
+	  }
 
-	    formFields.fieldsArr = function(val) {
-	        if (!arguments.length) { return _fieldsArr; }
-	        _fieldsArr = val || [];
-	        return formFields;
-	    };
+	  function zoomTo() {
+	    context.enter(modeBrowse(context));
+	    var map = context.map();
 
-	    formFields.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return formFields;
-	    };
+	    _layer.enabled(_position, true);
 
-	    formFields.klass = function(val) {
-	        if (!arguments.length) { return _klass; }
-	        _klass = val;
-	        return formFields;
-	    };
+	    updateButtonState();
+	    map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
+	  }
 
+	  function success(geolocation) {
+	    _position = geolocation;
+	    var coords = _position.coords;
+	    _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
+	    zoomTo();
+	    finish();
+	  }
 
-	    return formFields;
-	}
+	  function error() {
+	    if (_position) {
+	      // use the position from a previous call if we have one
+	      zoomTo();
+	    } else {
+	      context.ui().flash.label(_t.html('geolocate.location_unavailable')).iconName('#iD-icon-geolocate')();
+	    }
 
-	function uiSectionPresetFields(context) {
+	    finish();
+	  }
 
-	    var section = uiSection('preset-fields', context)
-	        .title(function() {
-	            return _t('inspector.fields');
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	  function finish() {
+	    _locating.close(); // unblock ui
 
-	    var dispatch$1 = dispatch('change', 'revert');
-	    var formFields = uiFormFields(context);
-	    var _state;
-	    var _fieldsArr;
-	    var _presets = [];
-	    var _tags;
-	    var _entityIDs;
 
-	    function renderDisclosureContent(selection) {
-	        if (!_fieldsArr) {
+	    if (_timeoutID) {
+	      clearTimeout(_timeoutID);
+	    }
 
-	            var graph = context.graph();
+	    _timeoutID = undefined;
+	  }
 
-	            var geometries = Object.keys(_entityIDs.reduce(function(geoms, entityID) {
-	                return geoms[graph.entity(entityID).geometry(graph)] = true;
-	            }, {}));
+	  function updateButtonState() {
+	    _button.classed('active', _layer.enabled());
+	  }
 
-	            var presetsManager = _mainPresetIndex;
+	  return function (selection) {
+	    if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) return;
+	    _button = selection.append('button').on('click', click).call(svgIcon('#iD-icon-geolocate', 'light')).call(uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_t.html('geolocate.title')).keys([_t('geolocate.key')]));
+	    context.keybinding().on(_t('geolocate.key'), click);
+	  };
+	}
 
-	            var allFields = [];
-	            var allMoreFields = [];
-	            var sharedTotalFields;
+	function uiPanelBackground(context) {
+	  var background = context.background();
+	  var _currSourceName = null;
+	  var _metadata = {};
+	  var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];
 
-	            _presets.forEach(function(preset) {
-	                var fields = preset.fields();
-	                var moreFields = preset.moreFields();
+	  var debouncedRedraw = debounce(redraw, 250);
 
-	                allFields = utilArrayUnion(allFields, fields);
-	                allMoreFields = utilArrayUnion(allMoreFields, moreFields);
+	  function redraw(selection) {
+	    var source = background.baseLayerSource();
+	    if (!source) return;
+	    var isDG = source.id.match(/^DigitalGlobe/i) !== null;
+	    var sourceLabel = source.label();
 
-	                if (!sharedTotalFields) {
-	                    sharedTotalFields = utilArrayUnion(fields, moreFields);
-	                } else {
-	                    sharedTotalFields = sharedTotalFields.filter(function(field) {
-	                        return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
-	                    });
-	                }
-	            });
+	    if (_currSourceName !== sourceLabel) {
+	      _currSourceName = sourceLabel;
+	      _metadata = {};
+	    }
 
-	            var sharedFields = allFields.filter(function(field) {
-	                return sharedTotalFields.indexOf(field) !== -1;
-	            });
-	            var sharedMoreFields = allMoreFields.filter(function(field) {
-	                return sharedTotalFields.indexOf(field) !== -1;
-	            });
+	    selection.html('');
+	    var list = selection.append('ul').attr('class', 'background-info');
+	    list.append('li').html(_currSourceName);
 
-	            _fieldsArr = [];
+	    _metadataKeys.forEach(function (k) {
+	      // DigitalGlobe vintage is available in raster layers for now.
+	      if (isDG && k === 'vintage') return;
+	      list.append('li').attr('class', 'background-info-list-' + k).classed('hide', !_metadata[k]).html(_t.html('info_panels.background.' + k) + ':').append('span').attr('class', 'background-info-span-' + k).html(_metadata[k]);
+	    });
 
-	            sharedFields.forEach(function(field) {
-	                if (field.matchAllGeometry(geometries)) {
-	                    _fieldsArr.push(
-	                        uiField(context, field, _entityIDs)
-	                    );
-	                }
-	            });
+	    debouncedGetMetadata(selection);
+	    var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
+	    selection.append('a').html(_t.html('info_panels.background.' + toggleTiles)).attr('href', '#').attr('class', 'button button-toggle-tiles').on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.setDebug('tile', !context.getDebug('tile'));
+	      selection.call(redraw);
+	    });
 
-	            var singularEntity = _entityIDs.length === 1 && graph.hasEntity(_entityIDs[0]);
-	            if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
-	                _fieldsArr.push(
-	                    uiField(context, presetsManager.field('restrictions'), _entityIDs)
-	                );
-	            }
+	    if (isDG) {
+	      var key = source.id + '-vintage';
+	      var sourceVintage = context.background().findSource(key);
+	      var showsVintage = context.background().showsLayer(sourceVintage);
+	      var toggleVintage = showsVintage ? 'hide_vintage' : 'show_vintage';
+	      selection.append('a').html(_t.html('info_panels.background.' + toggleVintage)).attr('href', '#').attr('class', 'button button-toggle-vintage').on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        context.background().toggleOverlayLayer(sourceVintage);
+	        selection.call(redraw);
+	      });
+	    } // disable if necessary
 
-	            var additionalFields = utilArrayUnion(sharedMoreFields, presetsManager.universal());
-	            additionalFields.sort(function(field1, field2) {
-	                return field1.label().localeCompare(field2.label(), _mainLocalizer.localeCode());
-	            });
 
-	            additionalFields.forEach(function(field) {
-	                if (sharedFields.indexOf(field) === -1 &&
-	                    field.matchAllGeometry(geometries)) {
-	                    _fieldsArr.push(
-	                        uiField(context, field, _entityIDs, { show: false })
-	                    );
-	                }
-	            });
+	    ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
+	      if (source.id !== layerId) {
+	        var key = layerId + '-vintage';
+	        var sourceVintage = context.background().findSource(key);
 
-	            _fieldsArr.forEach(function(field) {
-	                field
-	                    .on('change', function(t, onInput) {
-	                        dispatch$1.call('change', field, _entityIDs, t, onInput);
-	                    })
-	                    .on('revert', function(keys) {
-	                        dispatch$1.call('revert', field, keys);
-	                    });
-	            });
+	        if (context.background().showsLayer(sourceVintage)) {
+	          context.background().toggleOverlayLayer(sourceVintage);
 	        }
+	      }
+	    });
+	  }
 
-	        _fieldsArr.forEach(function(field) {
-	            field
-	                .state(_state)
-	                .tags(_tags);
-	        });
+	  var debouncedGetMetadata = debounce(getMetadata, 250);
 
+	  function getMetadata(selection) {
+	    var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center
 
-	        selection
-	            .call(formFields
-	                .fieldsArr(_fieldsArr)
-	                .state(_state)
-	                .klass('grouped-items-area')
-	            );
+	    if (tile.empty()) return;
+	    var sourceName = _currSourceName;
+	    var d = tile.datum();
+	    var zoom = d && d.length >= 3 && d[2] || Math.floor(context.map().zoom());
+	    var center = context.map().center(); // update zoom
 
+	    _metadata.zoom = String(zoom);
+	    selection.selectAll('.background-info-list-zoom').classed('hide', false).selectAll('.background-info-span-zoom').html(_metadata.zoom);
+	    if (!d || !d.length >= 3) return;
+	    background.baseLayerSource().getMetadata(center, d, function (err, result) {
+	      if (err || _currSourceName !== sourceName) return; // update vintage
 
-	        selection.selectAll('.wrap-form-field input')
-	            .on('keydown', function() {
-	                // if user presses enter, and combobox is not active, accept edits..
-	                if (event.keyCode === 13 && context.container().select('.combobox').empty()) {
-	                    context.enter(modeBrowse(context));
-	                }
-	            });
-	    }
+	      var vintage = result.vintage;
+	      _metadata.vintage = vintage && vintage.range || _t('info_panels.background.unknown');
+	      selection.selectAll('.background-info-list-vintage').classed('hide', false).selectAll('.background-info-span-vintage').html(_metadata.vintage); // update other _metadata
 
-	    section.presets = function(val) {
-	        if (!arguments.length) { return _presets; }
-	        if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
-	            _presets = val;
-	            _fieldsArr = null;
-	        }
-	        return section;
-	    };
+	      _metadataKeys.forEach(function (k) {
+	        if (k === 'zoom' || k === 'vintage') return; // done already
 
-	    section.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return section;
-	    };
+	        var val = result[k];
+	        _metadata[k] = val;
+	        selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).html(val);
+	      });
+	    });
+	  }
 
-	    section.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-	        // Don't reset _fieldsArr here.
-	        return section;
-	    };
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.map().on('drawn.info-background', function () {
+	      selection.call(debouncedRedraw);
+	    }).on('move.info-background', function () {
+	      selection.call(debouncedGetMetadata);
+	    });
+	  };
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
-	            _entityIDs = val;
-	            _fieldsArr = null;
-	        }
-	        return section;
-	    };
+	  panel.off = function () {
+	    context.map().on('drawn.info-background', null).on('move.info-background', null);
+	  };
 
-	    return utilRebind(section, dispatch$1, 'on');
+	  panel.id = 'background';
+	  panel.label = _t.html('info_panels.background.title');
+	  panel.key = _t('info_panels.background.key');
+	  return panel;
 	}
 
-	function uiSectionRawMemberEditor(context) {
+	function uiPanelHistory(context) {
+	  var osm;
 
-	    var section = uiSection('raw-member-editor', context)
-	        .shouldDisplay(function() {
-	            if (!_entityIDs || _entityIDs.length !== 1) { return false; }
+	  function displayTimestamp(timestamp) {
+	    if (!timestamp) return _t('info_panels.history.unknown');
+	    var options = {
+	      day: 'numeric',
+	      month: 'short',
+	      year: 'numeric',
+	      hour: 'numeric',
+	      minute: 'numeric',
+	      second: 'numeric'
+	    };
+	    var d = new Date(timestamp);
+	    if (isNaN(d.getTime())) return _t('info_panels.history.unknown');
+	    return d.toLocaleString(_mainLocalizer.localeCode(), options);
+	  }
 
-	            var entity = context.hasEntity(_entityIDs[0]);
-	            return entity && entity.type === 'relation';
-	        })
-	        .title(function() {
-	            var entity = context.hasEntity(_entityIDs[0]);
-	            if (!entity) { return ''; }
+	  function displayUser(selection, userName) {
+	    if (!userName) {
+	      selection.append('span').html(_t.html('info_panels.history.unknown'));
+	      return;
+	    }
 
-	            var gt = entity.members.length > _maxMembers ? '>' : '';
-	            var count = gt + entity.members.slice(0, _maxMembers).length;
-	            return _t('inspector.title_count', { title: _t('inspector.members'), count: count });
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	    selection.append('span').attr('class', 'user-name').html(userName);
+	    var links = selection.append('div').attr('class', 'links');
 
-	    var taginfo = services.taginfo;
-	    var _entityIDs;
-	    var _maxMembers = 1000;
+	    if (osm) {
+	      links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').html('OSM');
+	    }
 
-	    function downloadMember(d) {
-	        event.preventDefault();
+	    links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).html('HDYC');
+	  }
 
-	        // display the loading indicator
-	        select(this.parentNode).classed('tag-reference-loading', true);
-	        context.loadEntity(d.id, function() {
-	            section.reRender();
-	        });
+	  function displayChangeset(selection, changeset) {
+	    if (!changeset) {
+	      selection.append('span').html(_t.html('info_panels.history.unknown'));
+	      return;
 	    }
 
-	    function zoomToMember(d) {
-	        event.preventDefault();
+	    selection.append('span').attr('class', 'changeset-id').html(changeset);
+	    var links = selection.append('div').attr('class', 'links');
 
-	        var entity = context.entity(d.id);
-	        context.map().zoomToEase(entity);
+	    if (osm) {
+	      links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').html('OSM');
+	    }
 
-	        // highlight the feature in case it wasn't previously on-screen
-	        utilHighlightEntities([d.id], true, context);
+	    links.append('a').attr('class', 'changeset-osmcha-link').attr('href', 'https://osmcha.org/changesets/' + changeset).attr('target', '_blank').html('OSMCha');
+	    links.append('a').attr('class', 'changeset-achavi-link').attr('href', 'https://overpass-api.de/achavi/?changeset=' + changeset).attr('target', '_blank').html('Achavi');
+	  }
+
+	  function redraw(selection) {
+	    var selectedNoteID = context.selectedNoteID();
+	    osm = context.connection();
+	    var selected, note, entity;
+
+	    if (selectedNoteID && osm) {
+	      // selected 1 note
+	      selected = [_t('note.note') + ' ' + selectedNoteID];
+	      note = osm.getNote(selectedNoteID);
+	    } else {
+	      // selected 1..n entities
+	      selected = context.selectedIDs().filter(function (e) {
+	        return context.hasEntity(e);
+	      });
+
+	      if (selected.length) {
+	        entity = context.entity(selected[0]);
+	      }
 	    }
 
+	    var singular = selected.length === 1 ? selected[0] : null;
+	    selection.html('');
+	    selection.append('h4').attr('class', 'history-heading').html(singular || _t.html('info_panels.selected', {
+	      n: selected.length
+	    }));
+	    if (!singular) return;
+
+	    if (entity) {
+	      selection.call(redrawEntity, entity);
+	    } else if (note) {
+	      selection.call(redrawNote, note);
+	    }
+	  }
 
-	    function selectMember(d) {
-	        event.preventDefault();
+	  function redrawNote(selection, note) {
+	    if (!note || note.isNew()) {
+	      selection.append('div').html(_t.html('info_panels.history.note_no_history'));
+	      return;
+	    }
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.id], false, context);
+	    var list = selection.append('ul');
+	    list.append('li').html(_t.html('info_panels.history.note_comments') + ':').append('span').html(note.comments.length);
 
-	        var entity = context.entity(d.id);
-	        var mapExtent = context.map().extent();
-	        if (!entity.intersects(mapExtent, context.graph())) {
-	            // zoom to the entity if its extent is not visible now
-	            context.map().zoomToEase(entity);
-	        }
+	    if (note.comments.length) {
+	      list.append('li').html(_t.html('info_panels.history.note_created_date') + ':').append('span').html(displayTimestamp(note.comments[0].date));
+	      list.append('li').html(_t.html('info_panels.history.note_created_user') + ':').call(displayUser, note.comments[0].user);
+	    }
 
-	        context.enter(modeSelect(context, [d.id]));
+	    if (osm) {
+	      selection.append('a').attr('class', 'view-history-on-osm').attr('target', '_blank').attr('href', osm.noteURL(note)).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('info_panels.history.note_link_text'));
 	    }
+	  }
 
+	  function redrawEntity(selection, entity) {
+	    if (!entity || entity.isNew()) {
+	      selection.append('div').html(_t.html('info_panels.history.no_history'));
+	      return;
+	    }
 
-	    function changeRole(d) {
-	        var oldRole = d.role;
-	        var newRole = context.cleanRelationRole(select(this).property('value'));
+	    var links = selection.append('div').attr('class', 'links');
 
-	        if (oldRole !== newRole) {
-	            var member = { id: d.id, type: d.type, role: newRole };
-	            context.perform(
-	                actionChangeMember(d.relation.id, member, d.index),
-	                _t('operations.change_role.annotation')
-	            );
-	        }
+	    if (osm) {
+	      links.append('a').attr('class', 'view-history-on-osm').attr('href', osm.historyURL(entity)).attr('target', '_blank').attr('title', _t('info_panels.history.link_text')).html('OSM');
 	    }
 
+	    links.append('a').attr('class', 'pewu-history-viewer-link').attr('href', 'https://pewu.github.io/osm-history/#/' + entity.type + '/' + entity.osmId()).attr('target', '_blank').attr('tabindex', -1).html('PeWu');
+	    var list = selection.append('ul');
+	    list.append('li').html(_t.html('info_panels.history.version') + ':').append('span').html(entity.version);
+	    list.append('li').html(_t.html('info_panels.history.last_edit') + ':').append('span').html(displayTimestamp(entity.timestamp));
+	    list.append('li').html(_t.html('info_panels.history.edited_by') + ':').call(displayUser, entity.user);
+	    list.append('li').html(_t.html('info_panels.history.changeset') + ':').call(displayChangeset, entity.changeset);
+	  }
 
-	    function deleteMember(d) {
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.map().on('drawn.info-history', function () {
+	      selection.call(redraw);
+	    });
+	    context.on('enter.info-history', function () {
+	      selection.call(redraw);
+	    });
+	  };
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.id], false, context);
+	  panel.off = function () {
+	    context.map().on('drawn.info-history', null);
+	    context.on('enter.info-history', null);
+	  };
 
-	        context.perform(
-	            actionDeleteMember(d.relation.id, d.index),
-	            _t('operations.delete_member.annotation')
-	        );
+	  panel.id = 'history';
+	  panel.label = _t.html('info_panels.history.title');
+	  panel.key = _t('info_panels.history.key');
+	  return panel;
+	}
 
-	        if (!context.hasEntity(d.relation.id)) {
-	            context.enter(modeBrowse(context));
-	        }
+	var OSM_PRECISION = 7;
+	/**
+	 * Returns a localized representation of the given length measurement.
+	 *
+	 * @param {Number} m area in meters
+	 * @param {Boolean} isImperial true for U.S. customary units; false for metric
+	 */
+
+	function displayLength(m, isImperial) {
+	  var d = m * (isImperial ? 3.28084 : 1);
+	  var unit;
+
+	  if (isImperial) {
+	    if (d >= 5280) {
+	      d /= 5280;
+	      unit = 'miles';
+	    } else {
+	      unit = 'feet';
+	    }
+	  } else {
+	    if (d >= 1000) {
+	      d /= 1000;
+	      unit = 'kilometers';
+	    } else {
+	      unit = 'meters';
 	    }
+	  }
 
-	    function renderDisclosureContent(selection) {
+	  return _t('units.' + unit, {
+	    quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
+	      maximumSignificantDigits: 4
+	    })
+	  });
+	}
+	/**
+	 * Returns a localized representation of the given area measurement.
+	 *
+	 * @param {Number} m2 area in square meters
+	 * @param {Boolean} isImperial true for U.S. customary units; false for metric
+	 */
 
-	        var entityID = _entityIDs[0];
+	function displayArea(m2, isImperial) {
+	  var locale = _mainLocalizer.localeCode();
+	  var d = m2 * (isImperial ? 10.7639111056 : 1);
+	  var d1, d2, area;
+	  var unit1 = '';
+	  var unit2 = '';
+
+	  if (isImperial) {
+	    if (d >= 6969600) {
+	      // > 0.25mi² show mi²
+	      d1 = d / 27878400;
+	      unit1 = 'square_miles';
+	    } else {
+	      d1 = d;
+	      unit1 = 'square_feet';
+	    }
 
-	        var memberships = [];
-	        var entity = context.entity(entityID);
-	        entity.members.slice(0, _maxMembers).forEach(function(member, index) {
-	            memberships.push({
-	                index: index,
-	                id: member.id,
-	                type: member.type,
-	                role: member.role,
-	                relation: entity,
-	                member: context.hasEntity(member.id),
-	                domId: utilUniqueDomId(entityID + '-member-' + index)
-	            });
-	        });
+	    if (d > 4356 && d < 43560000) {
+	      // 0.1 - 1000 acres
+	      d2 = d / 43560;
+	      unit2 = 'acres';
+	    }
+	  } else {
+	    if (d >= 250000) {
+	      // > 0.25km² show km²
+	      d1 = d / 1000000;
+	      unit1 = 'square_kilometers';
+	    } else {
+	      d1 = d;
+	      unit1 = 'square_meters';
+	    }
 
-	        var list = selection.selectAll('.member-list')
-	            .data([0]);
+	    if (d > 1000 && d < 10000000) {
+	      // 0.1 - 1000 hectares
+	      d2 = d / 10000;
+	      unit2 = 'hectares';
+	    }
+	  }
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'member-list')
-	            .merge(list);
+	  area = _t('units.' + unit1, {
+	    quantity: d1.toLocaleString(locale, {
+	      maximumSignificantDigits: 4
+	    })
+	  });
 
+	  if (d2) {
+	    return _t('units.area_pair', {
+	      area1: area,
+	      area2: _t('units.' + unit2, {
+	        quantity: d2.toLocaleString(locale, {
+	          maximumSignificantDigits: 2
+	        })
+	      })
+	    });
+	  } else {
+	    return area;
+	  }
+	}
 
-	        var items = list.selectAll('li')
-	            .data(memberships, function(d) {
-	                return osmEntity.key(d.relation) + ',' + d.index + ',' +
-	                    (d.member ? osmEntity.key(d.member) : 'incomplete');
-	            });
+	function wrap$2(x, min, max) {
+	  var d = max - min;
+	  return ((x - min) % d + d) % d + min;
+	}
 
-	        items.exit()
-	            .each(unbind)
-	            .remove();
-
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'member-row form-field')
-	            .classed('member-incomplete', function(d) { return !d.member; });
-
-	        itemsEnter
-	            .each(function(d) {
-	                var item = select(this);
-
-	                var label = item
-	                    .append('label')
-	                    .attr('class', 'field-label')
-	                    .attr('for', d.domId);
-
-	                if (d.member) {
-	                    // highlight the member feature in the map while hovering on the list item
-	                    item
-	                        .on('mouseover', function() {
-	                            utilHighlightEntities([d.id], true, context);
-	                        })
-	                        .on('mouseout', function() {
-	                            utilHighlightEntities([d.id], false, context);
-	                        });
-
-	                    var labelLink = label
-	                        .append('span')
-	                        .attr('class', 'label-text')
-	                        .append('a')
-	                        .attr('href', '#')
-	                        .on('click', selectMember);
-
-	                    labelLink
-	                        .append('span')
-	                        .attr('class', 'member-entity-type')
-	                        .text(function(d) {
-	                            var matched = _mainPresetIndex.match(d.member, context.graph());
-	                            return (matched && matched.name()) || utilDisplayType(d.member.id);
-	                        });
-
-	                    labelLink
-	                        .append('span')
-	                        .attr('class', 'member-entity-name')
-	                        .text(function(d) { return utilDisplayName(d.member); });
-
-	                    label
-	                        .append('button')
-	                        .attr('tabindex', -1)
-	                        .attr('title', _t('icons.remove'))
-	                        .attr('class', 'remove member-delete')
-	                        .call(svgIcon('#iD-operation-delete'));
-
-	                    label
-	                        .append('button')
-	                        .attr('class', 'member-zoom')
-	                        .attr('title', _t('icons.zoom_to'))
-	                        .call(svgIcon('#iD-icon-framed-dot', 'monochrome'))
-	                        .on('click', zoomToMember);
-
-	                } else {
-	                    var labelText = label
-	                        .append('span')
-	                        .attr('class', 'label-text');
-
-	                    labelText
-	                        .append('span')
-	                        .attr('class', 'member-entity-type')
-	                        .text(_t('inspector.' + d.type, { id: d.id }));
-
-	                    labelText
-	                        .append('span')
-	                        .attr('class', 'member-entity-name')
-	                        .text(_t('inspector.incomplete', { id: d.id }));
-
-	                    label
-	                        .append('button')
-	                        .attr('class', 'member-download')
-	                        .attr('title', _t('icons.download'))
-	                        .attr('tabindex', -1)
-	                        .call(svgIcon('#iD-icon-load'))
-	                        .on('click', downloadMember);
-	                }
-	            });
+	function clamp$1(x, min, max) {
+	  return Math.max(min, Math.min(x, max));
+	}
 
-	        var wrapEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-member');
-
-	        wrapEnter
-	            .append('input')
-	            .attr('class', 'member-role')
-	            .attr('id', function(d) {
-	                return d.domId;
-	            })
-	            .property('type', 'text')
-	            .attr('placeholder', _t('inspector.role'))
-	            .call(utilNoAuto);
-
-	        if (taginfo) {
-	            wrapEnter.each(bindTypeahead);
-	        }
-
-	        // update
-	        items = items
-	            .merge(itemsEnter)
-	            .order();
-
-	        items.select('input.member-role')
-	            .property('value', function(d) { return d.role; })
-	            .on('blur', changeRole)
-	            .on('change', changeRole);
-
-	        items.select('button.member-delete')
-	            .on('click', deleteMember);
-
-	        var dragOrigin, targetIndex;
-
-	        items.call(d3_drag()
-	            .on('start', function() {
-	                dragOrigin = {
-	                    x: event.x,
-	                    y: event.y
-	                };
-	                targetIndex = null;
-	            })
-	            .on('drag', function(d, index) {
-	                var x = event.x - dragOrigin.x,
-	                    y = event.y - dragOrigin.y;
-
-	                if (!select(this).classed('dragging') &&
-	                    // don't display drag until dragging beyond a distance threshold
-	                    Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) { return; }
-
-	                select(this)
-	                    .classed('dragging', true);
-
-	                targetIndex = null;
-
-	                selection.selectAll('li.member-row')
-	                    .style('transform', function(d2, index2) {
-	                        var node = select(this).node();
-	                        if (index === index2) {
-	                            return 'translate(' + x + 'px, ' + y + 'px)';
-	                        } else if (index2 > index && event.y > node.offsetTop) {
-	                            if (targetIndex === null || index2 > targetIndex) {
-	                                targetIndex = index2;
-	                            }
-	                            return 'translateY(-100%)';
-	                        } else if (index2 < index && event.y < node.offsetTop + node.offsetHeight) {
-	                            if (targetIndex === null || index2 < targetIndex) {
-	                                targetIndex = index2;
-	                            }
-	                            return 'translateY(100%)';
-	                        }
-	                        return null;
-	                    });
-	            })
-	            .on('end', function(d, index) {
+	function displayCoordinate(deg, pos, neg) {
+	  var locale = _mainLocalizer.localeCode();
+	  var min = (Math.abs(deg) - Math.floor(Math.abs(deg))) * 60;
+	  var sec = (min - Math.floor(min)) * 60;
+	  var displayDegrees = _t('units.arcdegrees', {
+	    quantity: Math.floor(Math.abs(deg)).toLocaleString(locale)
+	  });
+	  var displayCoordinate;
 
-	                if (!select(this).classed('dragging')) {
-	                    return;
-	                }
+	  if (Math.floor(sec) > 0) {
+	    displayCoordinate = displayDegrees + _t('units.arcminutes', {
+	      quantity: Math.floor(min).toLocaleString(locale)
+	    }) + _t('units.arcseconds', {
+	      quantity: Math.round(sec).toLocaleString(locale)
+	    });
+	  } else if (Math.floor(min) > 0) {
+	    displayCoordinate = displayDegrees + _t('units.arcminutes', {
+	      quantity: Math.round(min).toLocaleString(locale)
+	    });
+	  } else {
+	    displayCoordinate = _t('units.arcdegrees', {
+	      quantity: Math.round(Math.abs(deg)).toLocaleString(locale)
+	    });
+	  }
 
-	                select(this)
-	                    .classed('dragging', false);
+	  if (deg === 0) {
+	    return displayCoordinate;
+	  } else {
+	    return _t('units.coordinate', {
+	      coordinate: displayCoordinate,
+	      direction: _t('units.' + (deg > 0 ? pos : neg))
+	    });
+	  }
+	}
+	/**
+	 * Returns given coordinate pair in degree-minute-second format.
+	 *
+	 * @param {Array<Number>} coord longitude and latitude
+	 */
 
-	                selection.selectAll('li.member-row')
-	                    .style('transform', null);
 
-	                if (targetIndex !== null) {
-	                    // dragged to a new position, reorder
-	                    context.perform(
-	                        actionMoveMember(d.relation.id, index, targetIndex),
-	                        _t('operations.reorder_members.annotation')
-	                    );
-	                }
-	            })
-	        );
+	function dmsCoordinatePair(coord) {
+	  return _t('units.coordinate_pair', {
+	    latitude: displayCoordinate(clamp$1(coord[1], -90, 90), 'north', 'south'),
+	    longitude: displayCoordinate(wrap$2(coord[0], -180, 180), 'east', 'west')
+	  });
+	}
+	/**
+	 * Returns the given coordinate pair in decimal format.
+	 * note: unlocalized to avoid comma ambiguity - see #4765
+	 *
+	 * @param {Array<Number>} coord longitude and latitude
+	 */
 
+	function decimalCoordinatePair(coord) {
+	  return _t('units.coordinate_pair', {
+	    latitude: clamp$1(coord[1], -90, 90).toFixed(OSM_PRECISION),
+	    longitude: wrap$2(coord[0], -180, 180).toFixed(OSM_PRECISION)
+	  });
+	}
 
+	function uiPanelLocation(context) {
+	  var currLocation = '';
 
-	        function bindTypeahead(d) {
-	            var row = select(this);
-	            var role = row.selectAll('input.member-role');
-	            var origValue = role.property('value');
+	  function redraw(selection) {
+	    selection.html('');
+	    var list = selection.append('ul'); // Mouse coordinates
 
-	            function sort(value, data) {
-	                var sameletter = [];
-	                var other = [];
-	                for (var i = 0; i < data.length; i++) {
-	                    if (data[i].value.substring(0, value.length) === value) {
-	                        sameletter.push(data[i]);
-	                    } else {
-	                        other.push(data[i]);
-	                    }
-	                }
-	                return sameletter.concat(other);
-	            }
+	    var coord = context.map().mouseCoordinates();
 
-	            role.call(uiCombobox(context, 'member-role')
-	                .fetcher(function(role, callback) {
-	                    // The `geometry` param is used in the `taginfo.js` interface for
-	                    // filtering results, as a key into the `tag_members_fractions`
-	                    // object.  If we don't know the geometry because the member is
-	                    // not yet downloaded, it's ok to guess based on type.
-	                    var geometry;
-	                    if (d.member) {
-	                        geometry = context.graph().geometry(d.member.id);
-	                    } else if (d.type === 'relation') {
-	                        geometry = 'relation';
-	                    } else if (d.type === 'way') {
-	                        geometry = 'line';
-	                    } else {
-	                        geometry = 'point';
-	                    }
+	    if (coord.some(isNaN)) {
+	      coord = context.map().center();
+	    }
 
-	                    var rtype = entity.tags.type;
-	                    taginfo.roles({
-	                        debounce: true,
-	                        rtype: rtype || '',
-	                        geometry: geometry,
-	                        query: role
-	                    }, function(err, data) {
-	                        if (!err) { callback(sort(role, data)); }
-	                    });
-	                })
-	                .on('cancel', function() {
-	                    role.property('value', origValue);
-	                })
-	            );
-	        }
+	    list.append('li').html(dmsCoordinatePair(coord)).append('li').html(decimalCoordinatePair(coord)); // Location Info
 
+	    selection.append('div').attr('class', 'location-info').html(currLocation || ' ');
+	    debouncedGetLocation(selection, coord);
+	  }
 
-	        function unbind() {
-	            var row = select(this);
+	  var debouncedGetLocation = debounce(getLocation, 250);
 
-	            row.selectAll('input.member-role')
-	                .call(uiCombobox.off, context);
-	        }
+	  function getLocation(selection, coord) {
+	    if (!services.geocoder) {
+	      currLocation = _t('info_panels.location.unknown_location');
+	      selection.selectAll('.location-info').html(currLocation);
+	    } else {
+	      services.geocoder.reverse(coord, function (err, result) {
+	        currLocation = result ? result.display_name : _t('info_panels.location.unknown_location');
+	        selection.selectAll('.location-info').html(currLocation);
+	      });
 	    }
+	  }
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return section;
-	    };
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
+	      selection.call(redraw);
+	    });
+	  };
 
+	  panel.off = function () {
+	    context.surface().on('.info-location', null);
+	  };
 
-	    return section;
+	  panel.id = 'location';
+	  panel.label = _t.html('info_panels.location.title');
+	  panel.key = _t('info_panels.location.key');
+	  return panel;
 	}
 
-	function uiSectionRawMembershipEditor(context) {
-
-	    var section = uiSection('raw-membership-editor', context)
-	        .shouldDisplay(function() {
-	            return _entityIDs && _entityIDs.length === 1;
-	        })
-	        .title(function() {
-	            var entity = context.hasEntity(_entityIDs[0]);
-	            if (!entity) { return ''; }
-
-	            var parents = context.graph().parentRelations(entity);
-	            var gt = parents.length > _maxMemberships ? '>' : '';
-	            var count = gt + parents.slice(0, _maxMemberships).length;
-	            return _t('inspector.title_count', { title: _t('inspector.relations'), count: count });
-	        })
-	        .disclosureContent(renderDisclosureContent);
-
-	    var taginfo = services.taginfo;
-	    var nearbyCombo = uiCombobox(context, 'parent-relation')
-	        .minItems(1)
-	        .fetcher(fetchNearbyRelations)
-	        .itemsMouseEnter(function(d) {
-	            if (d.relation) { utilHighlightEntities([d.relation.id], true, context); }
-	        })
-	        .itemsMouseLeave(function(d) {
-	            if (d.relation) { utilHighlightEntities([d.relation.id], false, context); }
-	        });
-	    var _inChange = false;
-	    var _entityIDs = [];
-	    var _showBlank;
-	    var _maxMemberships = 1000;
+	function uiPanelMeasurement(context) {
+	  function radiansToMeters(r) {
+	    // using WGS84 authalic radius (6371007.1809 m)
+	    return r * 6371007.1809;
+	  }
 
-	    function selectRelation(d) {
-	        event.preventDefault();
+	  function steradiansToSqmeters(r) {
+	    // http://gis.stackexchange.com/a/124857/40446
+	    return r / (4 * Math.PI) * 510065621724000;
+	  }
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.relation.id], false, context);
+	  function toLineString(feature) {
+	    if (feature.type === 'LineString') return feature;
+	    var result = {
+	      type: 'LineString',
+	      coordinates: []
+	    };
 
-	        context.enter(modeSelect(context, [d.relation.id]));
+	    if (feature.type === 'Polygon') {
+	      result.coordinates = feature.coordinates[0];
+	    } else if (feature.type === 'MultiPolygon') {
+	      result.coordinates = feature.coordinates[0][0];
 	    }
 
-	    function zoomToRelation(d) {
-	        event.preventDefault();
-
-	        var entity = context.entity(d.relation.id);
-	        context.map().zoomToEase(entity);
+	    return result;
+	  }
 
-	        // highlight the relation in case it wasn't previously on-screen
-	        utilHighlightEntities([d.relation.id], true, context);
-	    }
+	  function redraw(selection) {
+	    var graph = context.graph();
+	    var selectedNoteID = context.selectedNoteID();
+	    var osm = services.osm;
+	    var isImperial = !_mainLocalizer.usesMetric();
+	    var localeCode = _mainLocalizer.localeCode();
+	    var heading;
+	    var center, location, centroid;
+	    var closed, geometry;
+	    var totalNodeCount,
+	        length = 0,
+	        area = 0,
+	        distance;
+
+	    if (selectedNoteID && osm) {
+	      // selected 1 note
+	      var note = osm.getNote(selectedNoteID);
+	      heading = _t('note.note') + ' ' + selectedNoteID;
+	      location = note.loc;
+	      geometry = 'note';
+	    } else {
+	      // selected 1..n entities
+	      var selectedIDs = context.selectedIDs().filter(function (id) {
+	        return context.hasEntity(id);
+	      });
+	      var selected = selectedIDs.map(function (id) {
+	        return context.entity(id);
+	      });
+	      heading = selected.length === 1 ? selected[0].id : _t('info_panels.selected', {
+	        n: selected.length
+	      });
 
+	      if (selected.length) {
+	        var extent = geoExtent();
 
-	    function changeRole(d) {
-	        if (d === 0) { return; }    // called on newrow (shoudn't happen)
-	        if (_inChange) { return; }  // avoid accidental recursive call #5731
+	        for (var i in selected) {
+	          var entity = selected[i];
 
-	        var oldRole = d.member.role;
-	        var newRole = context.cleanRelationRole(select(this).property('value'));
+	          extent._extend(entity.extent(graph));
 
-	        if (oldRole !== newRole) {
-	            _inChange = true;
-	            context.perform(
-	                actionChangeMember(d.relation.id, Object.assign({}, d.member, { role: newRole }), d.index),
-	                _t('operations.change_role.annotation')
-	            );
-	        }
-	        _inChange = false;
-	    }
+	          geometry = entity.geometry(graph);
 
+	          if (geometry === 'line' || geometry === 'area') {
+	            closed = entity.type === 'relation' || entity.isClosed() && !entity.isDegenerate();
+	            var feature = entity.asGeoJSON(graph);
+	            length += radiansToMeters(d3_geoLength(toLineString(feature)));
+	            centroid = d3_geoCentroid(feature);
 
-	    function addMembership(d, role) {
-	        this.blur();           // avoid keeping focus on the button
-	        _showBlank = false;
+	            if (closed) {
+	              area += steradiansToSqmeters(entity.area(graph));
+	            }
+	          }
+	        }
 
-	        var member = { id: _entityIDs[0], type: context.entity(_entityIDs[0]).type, role: role };
+	        if (selected.length > 1) {
+	          geometry = null;
+	          closed = null;
+	          centroid = null;
+	        }
 
-	        if (d.relation) {
-	            context.perform(
-	                actionAddMember(d.relation.id, member),
-	                _t('operations.add_member.annotation')
-	            );
+	        if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
+	          distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
+	        }
 
+	        if (selected.length === 1 && selected[0].type === 'node') {
+	          location = selected[0].loc;
 	        } else {
-	            var relation = osmRelation();
-	            context.perform(
-	                actionAddEntity(relation),
-	                actionAddMember(relation.id, member),
-	                _t('operations.add.annotation.relation')
-	            );
+	          totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
+	        }
 
-	            context.enter(modeSelect(context, [relation.id]).newFeature(true));
+	        if (!location && !centroid) {
+	          center = extent.center();
 	        }
+	      }
 	    }
 
+	    selection.html('');
 
-	    function deleteMembership(d) {
-	        this.blur();           // avoid keeping focus on the button
-	        if (d === 0) { return; }   // called on newrow (shoudn't happen)
+	    if (heading) {
+	      selection.append('h4').attr('class', 'measurement-heading').html(heading);
+	    }
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.relation.id], false, context);
+	    var list = selection.append('ul');
+	    var coordItem;
 
-	        context.perform(
-	            actionDeleteMember(d.relation.id, d.index),
-	            _t('operations.delete_member.annotation')
-	        );
+	    if (geometry) {
+	      list.append('li').html(_t.html('info_panels.measurement.geometry') + ':').append('span').html(closed ? _t('info_panels.measurement.closed_' + geometry) : _t('geometry.' + geometry));
 	    }
 
+	    if (totalNodeCount) {
+	      list.append('li').html(_t.html('info_panels.measurement.node_count') + ':').append('span').html(totalNodeCount.toLocaleString(localeCode));
+	    }
 
-	    function fetchNearbyRelations(q, callback) {
-	        var newRelation = { relation: null, value: _t('inspector.new_relation') };
+	    if (area) {
+	      list.append('li').html(_t.html('info_panels.measurement.area') + ':').append('span').html(displayArea(area, isImperial));
+	    }
 
-	        var entityID = _entityIDs[0];
+	    if (length) {
+	      list.append('li').html(_t.html('info_panels.measurement.' + (closed ? 'perimeter' : 'length')) + ':').append('span').html(displayLength(length, isImperial));
+	    }
 
-	        var result = [];
+	    if (typeof distance === 'number') {
+	      list.append('li').html(_t.html('info_panels.measurement.distance') + ':').append('span').html(displayLength(distance, isImperial));
+	    }
 
-	        var graph = context.graph();
+	    if (location) {
+	      coordItem = list.append('li').html(_t.html('info_panels.measurement.location') + ':');
+	      coordItem.append('span').html(dmsCoordinatePair(location));
+	      coordItem.append('span').html(decimalCoordinatePair(location));
+	    }
 
-	        function baseDisplayLabel(entity) {
-	            var matched = _mainPresetIndex.match(entity, graph);
-	            var presetName = (matched && matched.name()) || _t('inspector.relation');
-	            var entityName = utilDisplayName(entity) || '';
+	    if (centroid) {
+	      coordItem = list.append('li').html(_t.html('info_panels.measurement.centroid') + ':');
+	      coordItem.append('span').html(dmsCoordinatePair(centroid));
+	      coordItem.append('span').html(decimalCoordinatePair(centroid));
+	    }
 
-	            return presetName + ' ' + entityName;
-	        }
+	    if (center) {
+	      coordItem = list.append('li').html(_t.html('info_panels.measurement.center') + ':');
+	      coordItem.append('span').html(dmsCoordinatePair(center));
+	      coordItem.append('span').html(decimalCoordinatePair(center));
+	    }
 
-	        var explicitRelation = q && context.hasEntity(q.toLowerCase());
-	        if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
-	            // loaded relation is specified explicitly, only show that
+	    if (length || area || typeof distance === 'number') {
+	      var toggle = isImperial ? 'imperial' : 'metric';
+	      selection.append('a').html(_t.html('info_panels.measurement.' + toggle)).attr('href', '#').attr('class', 'button button-toggle-units').on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        isImperial = !isImperial;
+	        selection.call(redraw);
+	      });
+	    }
+	  }
 
-	            result.push({
-	                relation: explicitRelation,
-	                value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
-	            });
-	        } else {
+	  var panel = function panel(selection) {
+	    selection.call(redraw);
+	    context.map().on('drawn.info-measurement', function () {
+	      selection.call(redraw);
+	    });
+	    context.on('enter.info-measurement', function () {
+	      selection.call(redraw);
+	    });
+	  };
 
-	            context.history().intersects(context.map().extent()).forEach(function(entity) {
-	                if (entity.type !== 'relation' || entity.id === entityID) { return; }
+	  panel.off = function () {
+	    context.map().on('drawn.info-measurement', null);
+	    context.on('enter.info-measurement', null);
+	  };
 
-	                var value = baseDisplayLabel(entity);
-	                if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) { return; }
+	  panel.id = 'measurement';
+	  panel.label = _t.html('info_panels.measurement.title');
+	  panel.key = _t('info_panels.measurement.key');
+	  return panel;
+	}
 
-	                result.push({ relation: entity, value: value });
-	            });
+	var uiInfoPanels = {
+	  background: uiPanelBackground,
+	  history: uiPanelHistory,
+	  location: uiPanelLocation,
+	  measurement: uiPanelMeasurement
+	};
 
-	            result.sort(function(a, b) {
-	                return osmRelation.creationOrder(a.relation, b.relation);
-	            });
+	function uiInfo(context) {
+	  var ids = Object.keys(uiInfoPanels);
+	  var wasActive = ['measurement'];
+	  var panels = {};
+	  var active = {}; // create panels
 
-	            // Dedupe identical names by appending relation id - see #2891
-	            var dupeGroups = Object.values(utilArrayGroupBy(result, 'value'))
-	                .filter(function(v) { return v.length > 1; });
+	  ids.forEach(function (k) {
+	    if (!panels[k]) {
+	      panels[k] = uiInfoPanels[k](context);
+	      active[k] = false;
+	    }
+	  });
 
-	            dupeGroups.forEach(function(group) {
-	                group.forEach(function(obj) {
-	                    obj.value += ' ' + obj.relation.id;
-	                });
-	            });
-	        }
+	  function info(selection) {
+	    function redraw() {
+	      var activeids = ids.filter(function (k) {
+	        return active[k];
+	      }).sort();
+	      var containers = infoPanels.selectAll('.panel-container').data(activeids, function (k) {
+	        return k;
+	      });
+	      containers.exit().style('opacity', 1).transition().duration(200).style('opacity', 0).on('end', function (d) {
+	        select(this).call(panels[d].off).remove();
+	      });
+	      var enter = containers.enter().append('div').attr('class', function (d) {
+	        return 'fillD2 panel-container panel-container-' + d;
+	      });
+	      enter.style('opacity', 0).transition().duration(200).style('opacity', 1);
+	      var title = enter.append('div').attr('class', 'panel-title fillD2');
+	      title.append('h3').html(function (d) {
+	        return panels[d].label;
+	      });
+	      title.append('button').attr('class', 'close').on('click', function (d3_event, d) {
+	        d3_event.stopImmediatePropagation();
+	        d3_event.preventDefault();
+	        info.toggle(d);
+	      }).call(svgIcon('#iD-icon-close'));
+	      enter.append('div').attr('class', function (d) {
+	        return 'panel-content panel-content-' + d;
+	      }); // redraw the panels
+
+	      infoPanels.selectAll('.panel-content').each(function (d) {
+	        select(this).call(panels[d]);
+	      });
+	    }
 
-	        result.forEach(function(obj) {
-	            obj.title = obj.value;
-	        });
+	    info.toggle = function (which) {
+	      var activeids = ids.filter(function (k) {
+	        return active[k];
+	      });
 
-	        result.unshift(newRelation);
-	        callback(result);
-	    }
+	      if (which) {
+	        // toggle one
+	        active[which] = !active[which];
+
+	        if (activeids.length === 1 && activeids[0] === which) {
+	          // none active anymore
+	          wasActive = [which];
+	        }
+
+	        context.container().select('.' + which + '-panel-toggle-item').classed('active', active[which]).select('input').property('checked', active[which]);
+	      } else {
+	        // toggle all
+	        if (activeids.length) {
+	          wasActive = activeids;
+	          activeids.forEach(function (k) {
+	            active[k] = false;
+	          });
+	        } else {
+	          wasActive.forEach(function (k) {
+	            active[k] = true;
+	          });
+	        }
+	      }
 
-	    function renderDisclosureContent(selection) {
+	      redraw();
+	    };
 
-	        var entityID = _entityIDs[0];
+	    var infoPanels = selection.selectAll('.info-panels').data([0]);
+	    infoPanels = infoPanels.enter().append('div').attr('class', 'info-panels').merge(infoPanels);
+	    redraw();
+	    context.keybinding().on(uiCmd('⌘' + _t('info_panels.key')), function (d3_event) {
+	      d3_event.stopImmediatePropagation();
+	      d3_event.preventDefault();
+	      info.toggle();
+	    });
+	    ids.forEach(function (k) {
+	      var key = _t('info_panels.' + k + '.key', {
+	        "default": null
+	      });
+	      if (!key) return;
+	      context.keybinding().on(uiCmd('⌘⇧' + key), function (d3_event) {
+	        d3_event.stopImmediatePropagation();
+	        d3_event.preventDefault();
+	        info.toggle(k);
+	      });
+	    });
+	  }
 
-	        var entity = context.entity(entityID);
-	        var parents = context.graph().parentRelations(entity);
+	  return info;
+	}
 
-	        var memberships = [];
+	function pointBox(loc, context) {
+	  var rect = context.surfaceRect();
+	  var point = context.curtainProjection(loc);
+	  return {
+	    left: point[0] + rect.left - 40,
+	    top: point[1] + rect.top - 60,
+	    width: 80,
+	    height: 90
+	  };
+	}
+	function pad(locOrBox, padding, context) {
+	  var box;
 
-	        parents.slice(0, _maxMemberships).forEach(function(relation) {
-	            relation.members.forEach(function(member, index) {
-	                if (member.id === entity.id) {
-	                    memberships.push({
-	                        relation: relation,
-	                        member: member,
-	                        index: index,
-	                        domId: utilUniqueDomId(entityID + '-membership-' + relation.id + '-' + index)
-	                    });
-	                }
-	            });
-	        });
+	  if (locOrBox instanceof Array) {
+	    var rect = context.surfaceRect();
+	    var point = context.curtainProjection(locOrBox);
+	    box = {
+	      left: point[0] + rect.left,
+	      top: point[1] + rect.top
+	    };
+	  } else {
+	    box = locOrBox;
+	  }
 
-	        var list = selection.selectAll('.member-list')
-	            .data([0]);
+	  return {
+	    left: box.left - padding,
+	    top: box.top - padding,
+	    width: (box.width || 0) + 2 * padding,
+	    height: (box.width || 0) + 2 * padding
+	  };
+	}
+	function icon(name, svgklass, useklass) {
+	  return '<svg class="icon ' + (svgklass || '') + '">' + '<use xlink:href="' + name + '"' + (useklass ? ' class="' + useklass + '"' : '') + '></use></svg>';
+	}
+	var helpStringReplacements; // Returns the localized HTML element for `id` with a standardized set of icon, key, and
+	// label replacements suitable for tutorials and documentation. Optionally supplemented
+	// with custom `replacements`
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'member-list')
-	            .merge(list);
+	function helpHtml(id, replacements) {
+	  // only load these the first time
+	  if (!helpStringReplacements) helpStringReplacements = {
+	    // insert icons corresponding to various UI elements
+	    point_icon: icon('#iD-icon-point', 'inline'),
+	    line_icon: icon('#iD-icon-line', 'inline'),
+	    area_icon: icon('#iD-icon-area', 'inline'),
+	    note_icon: icon('#iD-icon-note', 'inline add-note'),
+	    plus: icon('#iD-icon-plus', 'inline'),
+	    minus: icon('#iD-icon-minus', 'inline'),
+	    layers_icon: icon('#iD-icon-layers', 'inline'),
+	    data_icon: icon('#iD-icon-data', 'inline'),
+	    inspect: icon('#iD-icon-inspect', 'inline'),
+	    help_icon: icon('#iD-icon-help', 'inline'),
+	    undo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo', 'inline'),
+	    redo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-undo' : '#iD-icon-redo', 'inline'),
+	    save_icon: icon('#iD-icon-save', 'inline'),
+	    // operation icons
+	    circularize_icon: icon('#iD-operation-circularize', 'inline operation'),
+	    continue_icon: icon('#iD-operation-continue', 'inline operation'),
+	    copy_icon: icon('#iD-operation-copy', 'inline operation'),
+	    delete_icon: icon('#iD-operation-delete', 'inline operation'),
+	    disconnect_icon: icon('#iD-operation-disconnect', 'inline operation'),
+	    downgrade_icon: icon('#iD-operation-downgrade', 'inline operation'),
+	    extract_icon: icon('#iD-operation-extract', 'inline operation'),
+	    merge_icon: icon('#iD-operation-merge', 'inline operation'),
+	    move_icon: icon('#iD-operation-move', 'inline operation'),
+	    orthogonalize_icon: icon('#iD-operation-orthogonalize', 'inline operation'),
+	    paste_icon: icon('#iD-operation-paste', 'inline operation'),
+	    reflect_long_icon: icon('#iD-operation-reflect-long', 'inline operation'),
+	    reflect_short_icon: icon('#iD-operation-reflect-short', 'inline operation'),
+	    reverse_icon: icon('#iD-operation-reverse', 'inline operation'),
+	    rotate_icon: icon('#iD-operation-rotate', 'inline operation'),
+	    split_icon: icon('#iD-operation-split', 'inline operation'),
+	    straighten_icon: icon('#iD-operation-straighten', 'inline operation'),
+	    // interaction icons
+	    leftclick: icon('#iD-walkthrough-mouse-left', 'inline operation'),
+	    rightclick: icon('#iD-walkthrough-mouse-right', 'inline operation'),
+	    mousewheel_icon: icon('#iD-walkthrough-mousewheel', 'inline operation'),
+	    tap_icon: icon('#iD-walkthrough-tap', 'inline operation'),
+	    doubletap_icon: icon('#iD-walkthrough-doubletap', 'inline operation'),
+	    longpress_icon: icon('#iD-walkthrough-longpress', 'inline operation'),
+	    touchdrag_icon: icon('#iD-walkthrough-touchdrag', 'inline operation'),
+	    pinch_icon: icon('#iD-walkthrough-pinch-apart', 'inline operation'),
+	    // insert keys; may be localized and platform-dependent
+	    shift: uiCmd.display('⇧'),
+	    alt: uiCmd.display('⌥'),
+	    "return": uiCmd.display('↵'),
+	    esc: _t.html('shortcuts.key.esc'),
+	    space: _t.html('shortcuts.key.space'),
+	    add_note_key: _t.html('modes.add_note.key'),
+	    help_key: _t.html('help.key'),
+	    shortcuts_key: _t.html('shortcuts.toggle.key'),
+	    // reference localized UI labels directly so that they'll always match
+	    save: _t.html('save.title'),
+	    undo: _t.html('undo.title'),
+	    redo: _t.html('redo.title'),
+	    upload: _t.html('commit.save'),
+	    point: _t.html('modes.add_point.title'),
+	    line: _t.html('modes.add_line.title'),
+	    area: _t.html('modes.add_area.title'),
+	    note: _t.html('modes.add_note.label'),
+	    circularize: _t.html('operations.circularize.title'),
+	    "continue": _t.html('operations.continue.title'),
+	    copy: _t.html('operations.copy.title'),
+	    "delete": _t.html('operations.delete.title'),
+	    disconnect: _t.html('operations.disconnect.title'),
+	    downgrade: _t.html('operations.downgrade.title'),
+	    extract: _t.html('operations.extract.title'),
+	    merge: _t.html('operations.merge.title'),
+	    move: _t.html('operations.move.title'),
+	    orthogonalize: _t.html('operations.orthogonalize.title'),
+	    paste: _t.html('operations.paste.title'),
+	    reflect_long: _t.html('operations.reflect.title.long'),
+	    reflect_short: _t.html('operations.reflect.title.short'),
+	    reverse: _t.html('operations.reverse.title'),
+	    rotate: _t.html('operations.rotate.title'),
+	    split: _t.html('operations.split.title'),
+	    straighten: _t.html('operations.straighten.title'),
+	    map_data: _t.html('map_data.title'),
+	    osm_notes: _t.html('map_data.layers.notes.title'),
+	    fields: _t.html('inspector.fields'),
+	    tags: _t.html('inspector.tags'),
+	    relations: _t.html('inspector.relations'),
+	    new_relation: _t.html('inspector.new_relation'),
+	    turn_restrictions: _t.html('presets.fields.restrictions.label'),
+	    background_settings: _t.html('background.description'),
+	    imagery_offset: _t.html('background.fix_misalignment'),
+	    start_the_walkthrough: _t.html('splash.walkthrough'),
+	    help: _t.html('help.title'),
+	    ok: _t.html('intro.ok')
+	  };
+	  var reps;
+
+	  if (replacements) {
+	    reps = Object.assign(replacements, helpStringReplacements);
+	  } else {
+	    reps = helpStringReplacements;
+	  }
 
+	  return _t.html(id, reps) // use keyboard key styling for shortcuts
+	  .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
+	}
 
-	        var items = list.selectAll('li.member-row-normal')
-	            .data(memberships, function(d) {
-	                return osmEntity.key(d.relation) + ',' + d.index;
-	            });
+	function slugify(text) {
+	  return text.toString().toLowerCase().replace(/\s+/g, '-') // Replace spaces with -
+	  .replace(/[^\w\-]+/g, '') // Remove all non-word chars
+	  .replace(/\-\-+/g, '-') // Replace multiple - with single -
+	  .replace(/^-+/, '') // Trim - from start of text
+	  .replace(/-+$/, ''); // Trim - from end of text
+	} // console warning for missing walkthrough names
 
-	        items.exit()
-	            .each(unbind)
-	            .remove();
-
-	        // Enter
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'member-row member-row-normal form-field');
-
-	        // highlight the relation in the map while hovering on the list item
-	        itemsEnter.on('mouseover', function(d) {
-	                utilHighlightEntities([d.relation.id], true, context);
-	            })
-	            .on('mouseout', function(d) {
-	                utilHighlightEntities([d.relation.id], false, context);
-	            });
 
-	        var labelEnter = itemsEnter
-	            .append('label')
-	            .attr('class', 'field-label')
-	            .attr('for', function(d) {
-	                return d.domId;
-	            });
+	var missingStrings = {};
 
-	        var labelLink = labelEnter
-	            .append('span')
-	            .attr('class', 'label-text')
-	            .append('a')
-	            .attr('href', '#')
-	            .on('click', selectRelation);
-
-	        labelLink
-	            .append('span')
-	            .attr('class', 'member-entity-type')
-	            .text(function(d) {
-	                var matched = _mainPresetIndex.match(d.relation, context.graph());
-	                return (matched && matched.name()) || _t('inspector.relation');
-	            });
+	function checkKey(key, text) {
+	  if (_t(key, {
+	    "default": undefined
+	  }) === undefined) {
+	    if (missingStrings.hasOwnProperty(key)) return; // warn once
 
-	        labelLink
-	            .append('span')
-	            .attr('class', 'member-entity-name')
-	            .text(function(d) { return utilDisplayName(d.relation); });
-
-	        labelEnter
-	            .append('button')
-	            .attr('tabindex', -1)
-	            .attr('class', 'remove member-delete')
-	            .call(svgIcon('#iD-operation-delete'))
-	            .on('click', deleteMembership);
-
-	        labelEnter
-	            .append('button')
-	            .attr('class', 'member-zoom')
-	            .attr('title', _t('icons.zoom_to'))
-	            .call(svgIcon('#iD-icon-framed-dot', 'monochrome'))
-	            .on('click', zoomToRelation);
-
-	        var wrapEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-member');
-
-	        wrapEnter
-	            .append('input')
-	            .attr('class', 'member-role')
-	            .attr('id', function(d) {
-	                return d.domId;
-	            })
-	            .property('type', 'text')
-	            .attr('placeholder', _t('inspector.role'))
-	            .call(utilNoAuto)
-	            .property('value', function(d) { return d.member.role; })
-	            .on('blur', changeRole)
-	            .on('change', changeRole);
-
-	        if (taginfo) {
-	            wrapEnter.each(bindTypeahead);
-	        }
-
-
-	        var newMembership = list.selectAll('.member-row-new')
-	            .data(_showBlank ? [0] : []);
-
-	        // Exit
-	        newMembership.exit()
-	            .remove();
-
-	        // Enter
-	        var newMembershipEnter = newMembership.enter()
-	            .append('li')
-	            .attr('class', 'member-row member-row-new form-field');
-
-	        var newLabelEnter = newMembershipEnter
-	            .append('label')
-	            .attr('class', 'field-label');
-
-	        newLabelEnter
-	            .append('input')
-	            .attr('placeholder', _t('inspector.choose_relation'))
-	            .attr('type', 'text')
-	            .attr('class', 'member-entity-input')
-	            .call(utilNoAuto);
-
-	        newLabelEnter
-	            .append('button')
-	            .attr('tabindex', -1)
-	            .attr('class', 'remove member-delete')
-	            .call(svgIcon('#iD-operation-delete'))
-	            .on('click', function() {
-	                list.selectAll('.member-row-new')
-	                    .remove();
-	            });
+	    missingStrings[key] = text;
+	    var missing = key + ': ' + text;
+	    if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
+	  }
+	}
 
-	        var newWrapEnter = newMembershipEnter
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-member');
+	function localize(obj) {
+	  var key; // Assign name if entity has one..
 
-	        newWrapEnter
-	            .append('input')
-	            .attr('class', 'member-role')
-	            .property('type', 'text')
-	            .attr('placeholder', _t('inspector.role'))
-	            .call(utilNoAuto);
+	  var name = obj.tags && obj.tags.name;
 
-	        // Update
-	        newMembership = newMembership
-	            .merge(newMembershipEnter);
+	  if (name) {
+	    key = 'intro.graph.name.' + slugify(name);
+	    obj.tags.name = _t(key, {
+	      "default": name
+	    });
+	    checkKey(key, name);
+	  } // Assign street name if entity has one..
 
-	        newMembership.selectAll('.member-entity-input')
-	            .on('blur', cancelEntity)   // if it wasn't accepted normally, cancel it
-	            .call(nearbyCombo
-	                .on('accept', acceptEntity)
-	                .on('cancel', cancelEntity)
-	            );
 
+	  var street = obj.tags && obj.tags['addr:street'];
 
-	        // Container for the Add button
-	        var addRow = selection.selectAll('.add-row')
-	            .data([0]);
+	  if (street) {
+	    key = 'intro.graph.name.' + slugify(street);
+	    obj.tags['addr:street'] = _t(key, {
+	      "default": street
+	    });
+	    checkKey(key, street); // Add address details common across walkthrough..
+
+	    var addrTags = ['block_number', 'city', 'county', 'district', 'hamlet', 'neighbourhood', 'postcode', 'province', 'quarter', 'state', 'subdistrict', 'suburb'];
+	    addrTags.forEach(function (k) {
+	      var key = 'intro.graph.' + k;
+	      var tag = 'addr:' + k;
+	      var val = obj.tags && obj.tags[tag];
+	      var str = _t(key, {
+	        "default": val
+	      });
 
-	        // enter
-	        var addRowEnter = addRow.enter()
-	            .append('div')
-	            .attr('class', 'add-row');
+	      if (str) {
+	        if (str.match(/^<.*>$/) !== null) {
+	          delete obj.tags[tag];
+	        } else {
+	          obj.tags[tag] = str;
+	        }
+	      }
+	    });
+	  }
 
-	        var addRelationButton = addRowEnter
-	            .append('button')
-	            .attr('class', 'add-relation');
+	  return obj;
+	} // Used to detect squareness.. some duplicataion of code from actionOrthogonalize.
 
-	        addRelationButton
-	            .call(svgIcon('#iD-icon-plus', 'light'));
-	        addRelationButton
-	            .call(uiTooltip().title(_t('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
+	function isMostlySquare(points) {
+	  // note: uses 15 here instead of the 12 from actionOrthogonalize because
+	  // actionOrthogonalize can actually straighten some larger angles as it iterates
+	  var threshold = 15; // degrees within right or straight
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-value');   // preserve space
+	  var lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-buttons');  // preserve space
+	  var upperBound = Math.cos(threshold * Math.PI / 180); // near straight
 
-	        // update
-	        addRow = addRow
-	            .merge(addRowEnter);
+	  for (var i = 0; i < points.length; i++) {
+	    var a = points[(i - 1 + points.length) % points.length];
+	    var origin = points[i];
+	    var b = points[(i + 1) % points.length];
+	    var dotp = geoVecNormalizedDot(a, b, origin);
+	    var mag = Math.abs(dotp);
 
-	        addRow.select('.add-relation')
-	            .on('click', function() {
-	                _showBlank = true;
-	                section.reRender();
-	                list.selectAll('.member-entity-input').node().focus();
-	            });
+	    if (mag > lowerBound && mag < upperBound) {
+	      return false;
+	    }
+	  }
 
+	  return true;
+	}
+	function selectMenuItem(context, operation) {
+	  return context.container().select('.edit-menu .edit-menu-item-' + operation);
+	}
+	function transitionTime(point1, point2) {
+	  var distance = geoSphericalDistance(point1, point2);
+	  if (distance === 0) return 0;else if (distance < 80) return 500;else return 1000;
+	}
 
-	        function acceptEntity(d) {
-	            if (!d) {
-	                cancelEntity();
-	                return;
-	            }
-	            // remove hover-higlighting
-	            if (d.relation) { utilHighlightEntities([d.relation.id], false, context); }
+	function uiCurtain(containerNode) {
+	  var surface = select(null),
+	      tooltip = select(null),
+	      darkness = select(null);
 
-	            var role = context.cleanRelationRole(list.selectAll('.member-row-new .member-role').property('value'));
-	            addMembership(d, role);
-	        }
+	  function curtain(selection) {
+	    surface = selection.append('svg').attr('class', 'curtain').style('top', 0).style('left', 0);
+	    darkness = surface.append('path').attr('x', 0).attr('y', 0).attr('class', 'curtain-darkness');
+	    select(window).on('resize.curtain', resize);
+	    tooltip = selection.append('div').attr('class', 'tooltip');
+	    tooltip.append('div').attr('class', 'popover-arrow');
+	    tooltip.append('div').attr('class', 'popover-inner');
+	    resize();
 
+	    function resize() {
+	      surface.attr('width', containerNode.clientWidth).attr('height', containerNode.clientHeight);
+	      curtain.cut(darkness.datum());
+	    }
+	  }
+	  /**
+	   * Reveal cuts the curtain to highlight the given box,
+	   * and shows a tooltip with instructions next to the box.
+	   *
+	   * @param  {String|ClientRect} [box]   box used to cut the curtain
+	   * @param  {String}    [text]          text for a tooltip
+	   * @param  {Object}    [options]
+	   * @param  {string}    [options.tooltipClass]    optional class to add to the tooltip
+	   * @param  {integer}   [options.duration]        transition time in milliseconds
+	   * @param  {string}    [options.buttonText]      if set, create a button with this text label
+	   * @param  {function}  [options.buttonCallback]  if set, the callback for the button
+	   * @param  {function}  [options.padding]         extra margin in px to put around bbox
+	   * @param  {String|ClientRect} [options.tooltipBox]  box for tooltip position, if different from box for the curtain
+	   */
 
-	        function cancelEntity() {
-	            var input = newMembership.selectAll('.member-entity-input');
-	            input.property('value', '');
 
-	            // remove hover-higlighting
-	            context.surface().selectAll('.highlighted')
-	                .classed('highlighted', false);
-	        }
+	  curtain.reveal = function (box, html, options) {
+	    options = options || {};
 
+	    if (typeof box === 'string') {
+	      box = select(box).node();
+	    }
 
-	        function bindTypeahead(d) {
-	            var row = select(this);
-	            var role = row.selectAll('input.member-role');
-	            var origValue = role.property('value');
+	    if (box && box.getBoundingClientRect) {
+	      box = copyBox(box.getBoundingClientRect());
+	      var containerRect = containerNode.getBoundingClientRect();
+	      box.top -= containerRect.top;
+	      box.left -= containerRect.left;
+	    }
 
-	            function sort(value, data) {
-	                var sameletter = [];
-	                var other = [];
-	                for (var i = 0; i < data.length; i++) {
-	                    if (data[i].value.substring(0, value.length) === value) {
-	                        sameletter.push(data[i]);
-	                    } else {
-	                        other.push(data[i]);
-	                    }
-	                }
-	                return sameletter.concat(other);
-	            }
+	    if (box && options.padding) {
+	      box.top -= options.padding;
+	      box.left -= options.padding;
+	      box.bottom += options.padding;
+	      box.right += options.padding;
+	      box.height += options.padding * 2;
+	      box.width += options.padding * 2;
+	    }
 
-	            role.call(uiCombobox(context, 'member-role')
-	                .fetcher(function(role, callback) {
-	                    var rtype = d.relation.tags.type;
-	                    taginfo.roles({
-	                        debounce: true,
-	                        rtype: rtype || '',
-	                        geometry: context.graph().geometry(entityID),
-	                        query: role
-	                    }, function(err, data) {
-	                        if (!err) { callback(sort(role, data)); }
-	                    });
-	                })
-	                .on('cancel', function() {
-	                    role.property('value', origValue);
-	                })
-	            );
-	        }
+	    var tooltipBox;
 
+	    if (options.tooltipBox) {
+	      tooltipBox = options.tooltipBox;
 
-	        function unbind() {
-	            var row = select(this);
+	      if (typeof tooltipBox === 'string') {
+	        tooltipBox = select(tooltipBox).node();
+	      }
 
-	            row.selectAll('input.member-role')
-	                .call(uiCombobox.off, context);
-	        }
+	      if (tooltipBox && tooltipBox.getBoundingClientRect) {
+	        tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
+	      }
+	    } else {
+	      tooltipBox = box;
 	    }
 
+	    if (tooltipBox && html) {
+	      if (html.indexOf('**') !== -1) {
+	        if (html.indexOf('<span') === 0) {
+	          html = html.replace(/^(<span.*?>)(.+?)(\*\*)/, '$1<span>$2</span>$3');
+	        } else {
+	          html = html.replace(/^(.+?)(\*\*)/, '<span>$1</span>$2');
+	        } // pseudo markdown bold text for the instruction section..
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        _showBlank = false;
-	        return section;
-	    };
 
+	        html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
+	      }
 
-	    return section;
-	}
+	      html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis
 
-	function uiSectionSelectionList(context) {
+	      html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak
 
-	    var _selectedIDs = [];
+	      if (options.buttonText && options.buttonCallback) {
+	        html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
+	      }
 
-	    var section = uiSection('selected-features', context)
-	        .shouldDisplay(function() {
-	            return _selectedIDs.length > 1;
-	        })
-	        .title(function() {
-	            return _t('inspector.title_count', { title: _t('inspector.features'), count: _selectedIDs.length });
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	      var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
+	      tooltip.classed(classes, true).selectAll('.popover-inner').html(html);
 
-	    context.history()
-	        .on('change.selectionList', function(difference) {
-	            if (difference) {
-	                section.reRender();
-	            }
+	      if (options.buttonText && options.buttonCallback) {
+	        var button = tooltip.selectAll('.button-section .button.action');
+	        button.on('click', function (d3_event) {
+	          d3_event.preventDefault();
+	          options.buttonCallback();
 	        });
+	      }
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _selectedIDs; }
-	        _selectedIDs = val;
-	        return section;
-	    };
+	      var tip = copyBox(tooltip.node().getBoundingClientRect()),
+	          w = containerNode.clientWidth,
+	          h = containerNode.clientHeight,
+	          tooltipWidth = 200,
+	          tooltipArrow = 5,
+	          side,
+	          pos; // hack: this will have bottom placement,
+	      // so need to reserve extra space for the tooltip illustration.
 
-	    function selectEntity(entity) {
-	        context.enter(modeSelect(context, [entity.id]));
-	    }
+	      if (options.tooltipClass === 'intro-mouse') {
+	        tip.height += 80;
+	      } // trim box dimensions to just the portion that fits in the container..
 
-	    function deselectEntity(entity) {
-	        event.stopPropagation();
 
-	        var selectedIDs = _selectedIDs.slice();
-	        var index = selectedIDs.indexOf(entity.id);
-	        if (index > -1) {
-	            selectedIDs.splice(index, 1);
-	            context.enter(modeSelect(context, selectedIDs));
-	        }
-	    }
+	      if (tooltipBox.top + tooltipBox.height > h) {
+	        tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
+	      }
 
-	    function renderDisclosureContent(selection) {
+	      if (tooltipBox.left + tooltipBox.width > w) {
+	        tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
+	      } // determine tooltip placement..
 
-	        var list = selection.selectAll('.feature-list')
-	            .data([0]);
 
-	        list = list.enter()
-	            .append('div')
-	            .attr('class', 'feature-list')
-	            .merge(list);
+	      if (tooltipBox.top + tooltipBox.height < 100) {
+	        // tooltip below box..
+	        side = 'bottom';
+	        pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top + tooltipBox.height];
+	      } else if (tooltipBox.top > h - 140) {
+	        // tooltip above box..
+	        side = 'top';
+	        pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top - tip.height];
+	      } else {
+	        // tooltip to the side of the tooltipBox..
+	        var tipY = tooltipBox.top + tooltipBox.height / 2 - tip.height / 2;
+
+	        if (_mainLocalizer.textDirection() === 'rtl') {
+	          if (tooltipBox.left - tooltipWidth - tooltipArrow < 70) {
+	            side = 'right';
+	            pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+	          } else {
+	            side = 'left';
+	            pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
+	          }
+	        } else {
+	          if (tooltipBox.left + tooltipBox.width + tooltipArrow + tooltipWidth > w - 70) {
+	            side = 'left';
+	            pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
+	          } else {
+	            side = 'right';
+	            pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+	          }
+	        }
+	      }
 
-	        var entities = _selectedIDs
-	            .map(function(id) { return context.hasEntity(id); })
-	            .filter(Boolean);
+	      if (options.duration !== 0 || !tooltip.classed(side)) {
+	        tooltip.call(uiToggle(true));
+	      }
 
-	        var items = list.selectAll('.feature-list-item')
-	            .data(entities, osmEntity.key);
+	      tooltip.style('top', pos[1] + 'px').style('left', pos[0] + 'px').attr('class', classes + ' ' + side); // shift popover-inner if it is very close to the top or bottom edge
+	      // (doesn't affect the placement of the popover-arrow)
 
-	        items.exit()
-	            .remove();
+	      var shiftY = 0;
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('div')
-	            .attr('class', 'feature-list-item')
-	            .on('click', selectEntity);
+	      if (side === 'left' || side === 'right') {
+	        if (pos[1] < 60) {
+	          shiftY = 60 - pos[1];
+	        } else if (pos[1] + tip.height > h - 100) {
+	          shiftY = h - pos[1] - tip.height - 100;
+	        }
+	      }
 
-	        enter
-	            .each(function(d) {
-	                select(this).on('mouseover', function() {
-	                    utilHighlightEntities([d.id], true, context);
-	                });
-	                select(this).on('mouseout', function() {
-	                    utilHighlightEntities([d.id], false, context);
-	                });
-	            });
+	      tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
+	    } else {
+	      tooltip.classed('in', false).call(uiToggle(false));
+	    }
 
-	        var label = enter
-	            .append('button')
-	            .attr('class', 'label');
-
-	        enter
-	            .append('button')
-	            .attr('class', 'close')
-	            .attr('title', _t('icons.deselect'))
-	            .on('click', deselectEntity)
-	            .call(svgIcon('#iD-icon-close'));
-
-	        label
-	            .append('span')
-	            .attr('class', 'entity-geom-icon')
-	            .call(svgIcon('', 'pre-text'));
-
-	        label
-	            .append('span')
-	            .attr('class', 'entity-type');
-
-	        label
-	            .append('span')
-	            .attr('class', 'entity-name');
-
-	        // Update
-	        items = items.merge(enter);
-
-	        items.selectAll('.entity-geom-icon use')
-	            .attr('href', function() {
-	                var entity = this.parentNode.parentNode.__data__;
-	                return '#iD-icon-' + entity.geometry(context.graph());
-	            });
+	    curtain.cut(box, options.duration);
+	    return tooltip;
+	  };
 
-	        items.selectAll('.entity-type')
-	            .text(function(entity) { return _mainPresetIndex.match(entity, context.graph()).name(); });
+	  curtain.cut = function (datum, duration) {
+	    darkness.datum(datum).interrupt();
+	    var selection;
 
-	        items.selectAll('.entity-name')
-	            .text(function(d) {
-	                // fetch latest entity
-	                var entity = context.entity(d.id);
-	                return utilDisplayName(entity);
-	            });
+	    if (duration === 0) {
+	      selection = darkness;
+	    } else {
+	      selection = darkness.transition().duration(duration || 600).ease(linear$1);
 	    }
 
-	    return section;
-	}
-
-	function uiEntityEditor(context) {
-	    var dispatch$1 = dispatch('choose');
-	    var _state = 'select';
-	    var _coalesceChanges = false;
-	    var _modified = false;
-	    var _base;
-	    var _entityIDs;
-	    var _activePresets = [];
-	    var _newFeature;
+	    selection.attr('d', function (d) {
+	      var containerWidth = containerNode.clientWidth;
+	      var containerHeight = containerNode.clientHeight;
+	      var string = 'M 0,0 L 0,' + containerHeight + ' L ' + containerWidth + ',' + containerHeight + 'L' + containerWidth + ',0 Z';
+	      if (!d) return string;
+	      return string + 'M' + d.left + ',' + d.top + 'L' + d.left + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + d.top + 'Z';
+	    });
+	  };
 
-	    var _sections;
+	  curtain.remove = function () {
+	    surface.remove();
+	    tooltip.remove();
+	    select(window).on('resize.curtain', null);
+	  }; // ClientRects are immutable, so copy them to an object,
+	  // in case we need to trim the height/width.
 
-	    function entityEditor(selection) {
 
-	        var combinedTags = utilCombinedTags(_entityIDs, context.graph());
+	  function copyBox(src) {
+	    return {
+	      top: src.top,
+	      right: src.right,
+	      bottom: src.bottom,
+	      left: src.left,
+	      width: src.width,
+	      height: src.height
+	    };
+	  }
 
-	        // Header
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	  return curtain;
+	}
 
-	        // Enter
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL cf');
+	function uiIntroWelcome(context, reveal) {
+	  var dispatch$1 = dispatch('done');
+	  var chapter = {
+	    title: 'intro.welcome.title'
+	  };
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'preset-reset preset-choose')
-	            .call(svgIcon((_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-forward' : '#iD-icon-backward'));
+	  function welcome() {
+	    context.map().centerZoom([-85.63591, 41.94285], 19);
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.welcome'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: practice
+	    });
+	  }
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() { context.enter(modeBrowse(context)); })
-	            .call(svgIcon(_modified ? '#iD-icon-apply' : '#iD-icon-close'));
+	  function practice() {
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: words
+	    });
+	  }
 
-	        headerEnter
-	            .append('h3');
+	  function words() {
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: chapters
+	    });
+	  }
 
-	        // Update
-	        header = header
-	            .merge(headerEnter);
+	  function chapters() {
+	    dispatch$1.call('done');
+	    reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
+	      next: _t('intro.navigation.title')
+	    }));
+	  }
 
-	        header.selectAll('h3')
-	            .text(_entityIDs.length === 1 ? _t('inspector.edit') : _t('inspector.edit_features'));
+	  chapter.enter = function () {
+	    welcome();
+	  };
 
-	        header.selectAll('.preset-reset')
-	            .on('click', function() {
-	                dispatch$1.call('choose', this, _activePresets);
-	            });
+	  chapter.exit = function () {
+	    context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
+	  };
 
-	        // Body
-	        var body = selection.selectAll('.inspector-body')
-	            .data([0]);
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        // Enter
-	        var bodyEnter = body.enter()
-	            .append('div')
-	            .attr('class', 'entity-editor inspector-body sep-top');
-
-	        // Update
-	        body = body
-	            .merge(bodyEnter);
-
-	        if (!_sections) {
-	            _sections = [
-	                uiSectionSelectionList(context),
-	                uiSectionFeatureType(context).on('choose', function(presets) {
-	                    dispatch$1.call('choose', this, presets);
-	                }),
-	                uiSectionEntityIssues(context),
-	                uiSectionPresetFields(context).on('change', changeTags).on('revert', revertTags),
-	                uiSectionRawTagEditor('raw-tag-editor', context).on('change', changeTags),
-	                uiSectionRawMemberEditor(context),
-	                uiSectionRawMembershipEditor(context)
-	            ];
-	        }
-
-	        _sections.forEach(function(section) {
-	            if (section.entityIDs) {
-	                section.entityIDs(_entityIDs);
-	            }
-	            if (section.presets) {
-	                section.presets(_activePresets);
-	            }
-	            if (section.tags) {
-	                section.tags(combinedTags);
-	            }
-	            if (section.state) {
-	                section.state(_state);
-	            }
-	            body.call(section.render);
-	        });
+	  return utilRebind(chapter, dispatch$1, 'on');
+	}
 
-	        body
-	            .selectAll('.key-trap-wrap')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'key-trap-wrap')
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', 'key-trap')
-	            .on('keydown.key-trap', function() {
-	                // On tabbing, send focus back to the first field on the inspector-body
-	                // (probably the `name` field) #4159
-	                if (event.keyCode === 9 && !event.shiftKey) {
-	                    event.preventDefault();
-	                    body.select('input').node().focus();
-	                }
-	            });
+	function uiIntroNavigation(context, reveal) {
+	  var dispatch$1 = dispatch('done');
+	  var timeouts = [];
+	  var hallId = 'n2061';
+	  var townHall = [-85.63591, 41.94285];
+	  var springStreetId = 'w397';
+	  var springStreetEndId = 'n1834';
+	  var springStreet = [-85.63582, 41.94255];
+	  var onewayField = _mainPresetIndex.field('oneway');
+	  var maxspeedField = _mainPresetIndex.field('maxspeed');
+	  var chapter = {
+	    title: 'intro.navigation.title'
+	  };
 
-	        context.history()
-	            .on('change.entity-editor', historyChanged);
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	        function historyChanged(difference) {
-	            if (selection.selectAll('.entity-editor').empty()) { return; }
-	            if (_state === 'hide') { return; }
-	            var significant = !difference ||
-	                    difference.didChange.properties ||
-	                    difference.didChange.addition ||
-	                    difference.didChange.deletion;
-	            if (!significant) { return; }
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	            _entityIDs = _entityIDs.filter(context.hasEntity);
-	            if (!_entityIDs.length) { return; }
+	  function isTownHallSelected() {
+	    var ids = context.selectedIDs();
+	    return ids.length === 1 && ids[0] === hallId;
+	  }
 
-	            var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
+	  function dragMap() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(townHall, context.map().center());
 
-	            loadActivePresets();
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	            var graph = context.graph();
-	            entityEditor.modified(_base !== graph);
-	            entityEditor(selection);
+	    context.map().centerZoomEase(townHall, 19, msec);
+	    timeout(function () {
+	      var centerStart = context.map().center();
+	      var textId = context.lastPointerType() === 'mouse' ? 'drag' : 'drag_touch';
+	      var dragString = helpHtml('intro.navigation.map_info') + '{br}' + helpHtml('intro.navigation.' + textId);
+	      reveal('.surface', dragString);
+	      context.map().on('drawn.intro', function () {
+	        reveal('.surface', dragString, {
+	          duration: 0
+	        });
+	      });
+	      context.map().on('move.intro', function () {
+	        var centerNow = context.map().center();
 
-	            if (priorActivePreset && _activePresets.length === 1 && priorActivePreset !== _activePresets[0]) {
-	                // flash the button to indicate the preset changed
-	                context.container().selectAll('.entity-editor button.preset-reset .label')
-	                    .style('background-color', '#fff')
-	                    .transition()
-	                    .duration(750)
-	                    .style('background-color', null);
-	            }
+	        if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
+	          context.map().on('move.intro', null);
+	          timeout(function () {
+	            continueTo(zoomMap);
+	          }, 3000);
 	        }
+	      });
+	    }, msec + 100);
+
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function zoomMap() {
+	    var zoomStart = context.map().zoom();
+	    var textId = context.lastPointerType() === 'mouse' ? 'zoom' : 'zoom_touch';
+	    var zoomString = helpHtml('intro.navigation.' + textId);
+	    reveal('.surface', zoomString);
+	    context.map().on('drawn.intro', function () {
+	      reveal('.surface', zoomString, {
+	        duration: 0
+	      });
+	    });
+	    context.map().on('move.intro', function () {
+	      if (context.map().zoom() !== zoomStart) {
+	        context.map().on('move.intro', null);
+	        timeout(function () {
+	          continueTo(features);
+	        }, 3000);
+	      }
+	    });
 
-	    // Tag changes that fire on input can all get coalesced into a single
-	    // history operation when the user leaves the field.  #2342
-	    // Use explicit entityIDs in case the selection changes before the event is fired.
-	    function changeTags(entityIDs, changed, onInput) {
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var actions = [];
-	        for (var i in entityIDs) {
-	            var entityID = entityIDs[i];
-	            var entity = context.entity(entityID);
+	  function features() {
+	    var onClick = function onClick() {
+	      continueTo(pointsLinesAreas);
+	    };
 
-	            var tags = Object.assign({}, entity.tags);   // shallow copy
+	    reveal('.surface', helpHtml('intro.navigation.features'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('drawn.intro', function () {
+	      reveal('.surface', helpHtml('intro.navigation.features'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
 
-	            for (var k in changed) {
-	                if (!k) { continue; }
-	                var v = changed[k];
-	                if (v !== undefined || tags.hasOwnProperty(k)) {
-	                    tags[k] = v;
-	                }
-	            }
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            if (!onInput) {
-	                tags = utilCleanTags(tags);
-	            }
+	  function pointsLinesAreas() {
+	    var onClick = function onClick() {
+	      continueTo(nodesWays);
+	    };
 
-	            if (!fastDeepEqual(entity.tags, tags)) {
-	                actions.push(actionChangeTags(entityID, tags));
-	            }
-	        }
+	    reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('drawn.intro', function () {
+	      reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
 
-	        if (actions.length) {
-	            var combinedAction = function(graph) {
-	                actions.forEach(function(action) {
-	                    graph = action(graph);
-	                });
-	                return graph;
-	            };
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            var annotation = _t('operations.change_tags.annotation');
+	  function nodesWays() {
+	    var onClick = function onClick() {
+	      continueTo(clickTownHall);
+	    };
 
-	            if (_coalesceChanges) {
-	                context.overwrite(combinedAction, annotation);
-	            } else {
-	                context.perform(combinedAction, annotation);
-	                _coalesceChanges = !!onInput;
-	            }
-	        }
+	    reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('drawn.intro', function () {
+	      reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
 
-	        // if leaving field (blur event), rerun validation
-	        if (!onInput) {
-	            context.validator().validate();
-	        }
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    function revertTags(keys) {
-
-	        var actions = [];
-	        for (var i in _entityIDs) {
-	            var entityID = _entityIDs[i];
+	  function clickTownHall() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var entity = context.hasEntity(hallId);
+	    if (!entity) return;
+	    reveal(null, null, {
+	      duration: 0
+	    });
+	    context.map().centerZoomEase(entity.loc, 19, 500);
+	    timeout(function () {
+	      var entity = context.hasEntity(hallId);
+	      if (!entity) return;
+	      var box = pointBox(entity.loc, context);
+	      var textId = context.lastPointerType() === 'mouse' ? 'click_townhall' : 'tap_townhall';
+	      reveal(box, helpHtml('intro.navigation.' + textId));
+	      context.map().on('move.intro drawn.intro', function () {
+	        var entity = context.hasEntity(hallId);
+	        if (!entity) return;
+	        var box = pointBox(entity.loc, context);
+	        reveal(box, helpHtml('intro.navigation.' + textId), {
+	          duration: 0
+	        });
+	      });
+	      context.on('enter.intro', function () {
+	        if (isTownHallSelected()) continueTo(selectedTownHall);
+	      });
+	    }, 550); // after centerZoomEase
 
-	            var original = context.graph().base().entities[entityID];
-	            var changed = {};
-	            for (var j in keys) {
-	                var key = keys[j];
-	                changed[key] = original ? original.tags[key] : undefined;
-	            }
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	            var entity = context.entity(entityID);
-	            var tags = Object.assign({}, entity.tags);   // shallow copy
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            for (var k in changed) {
-	                if (!k) { continue; }
-	                var v = changed[k];
-	                if (v !== undefined || tags.hasOwnProperty(k)) {
-	                    tags[k] = v;
-	                }
-	            }
+	  function selectedTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall();
+	    var entity = context.hasEntity(hallId);
+	    if (!entity) return clickTownHall();
+	    var box = pointBox(entity.loc, context);
 
+	    var onClick = function onClick() {
+	      continueTo(editorTownHall);
+	    };
 
-	            tags = utilCleanTags(tags);
+	    reveal(box, helpHtml('intro.navigation.selected_townhall'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      var entity = context.hasEntity(hallId);
+	      if (!entity) return;
+	      var box = pointBox(entity.loc, context);
+	      reveal(box, helpHtml('intro.navigation.selected_townhall'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	            if (!fastDeepEqual(entity.tags, tags)) {
-	                actions.push(actionChangeTags(entityID, tags));
-	            }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        }
+	  function editorTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling
 
-	        if (actions.length) {
-	            var combinedAction = function(graph) {
-	                actions.forEach(function(action) {
-	                    graph = action(graph);
-	                });
-	                return graph;
-	            };
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	            var annotation = _t('operations.change_tags.annotation');
+	    var onClick = function onClick() {
+	      continueTo(presetTownHall);
+	    };
 
-	            if (_coalesceChanges) {
-	                context.overwrite(combinedAction, annotation);
-	            } else {
-	                context.perform(combinedAction, annotation);
-	                _coalesceChanges = false;
-	            }
-	        }
+	    reveal('.entity-editor-pane', helpHtml('intro.navigation.editor_townhall'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.on('exit.intro', function () {
+	      continueTo(clickTownHall);
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	        context.validator().validate();
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function presetTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
-	    entityEditor.modified = function(val) {
-	        if (!arguments.length) { return _modified; }
-	        _modified = val;
-	        return entityEditor;
-	    };
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
+
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.
 
+	    var entity = context.entity(context.selectedIDs()[0]);
+	    var preset = _mainPresetIndex.match(entity, context.graph());
 
-	    entityEditor.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return entityEditor;
+	    var onClick = function onClick() {
+	      continueTo(fieldsTownHall);
 	    };
 
+	    reveal('.entity-editor-pane .section-feature-type', helpHtml('intro.navigation.preset_townhall', {
+	      preset: preset.name()
+	    }), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.on('exit.intro', function () {
+	      continueTo(clickTownHall);
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
+
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    entityEditor.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) { return entityEditor; }  // exit early if no change
+	  function fieldsTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
-	        _entityIDs = val;
-	        _base = context.graph();
-	        _coalesceChanges = false;
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
-	        loadActivePresets();
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	        return entityEditor
-	            .modified(false);
+	    var onClick = function onClick() {
+	      continueTo(closeTownHall);
 	    };
 
+	    reveal('.entity-editor-pane .section-preset-fields', helpHtml('intro.navigation.fields_townhall'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.on('exit.intro', function () {
+	      continueTo(clickTownHall);
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
+
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    entityEditor.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return entityEditor;
-	    };
+	  function closeTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall();
+	    var selector = '.entity-editor-pane button.close svg use';
+	    var href = select(selector).attr('href') || '#iD-icon-close';
+	    reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
+	      button: icon(href, 'inline')
+	    }));
+	    context.on('exit.intro', function () {
+	      continueTo(searchStreet);
+	    });
+	    context.history().on('change.intro', function () {
+	      // update the close icon in the tooltip if the user edits something.
+	      var selector = '.entity-editor-pane button.close svg use';
+	      var href = select(selector).attr('href') || '#iD-icon-close';
+	      reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
+	        button: icon(href, 'inline')
+	      }), {
+	        duration: 0
+	      });
+	    });
 
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    function loadActivePresets() {
+	  function searchStreet() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial'); // ensure spring street exists
 
-	        var graph = context.graph();
+	    var msec = transitionTime(springStreet, context.map().center());
 
-	        var counts = {};
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	        for (var i in _entityIDs) {
-	            var entity = graph.hasEntity(_entityIDs[i]);
-	            if (!entity) { return; }
+	    context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it
 
-	            var match = _mainPresetIndex.match(entity, graph);
+	    timeout(function () {
+	      reveal('.search-header input', helpHtml('intro.navigation.search_street', {
+	        name: _t('intro.graph.name.spring-street')
+	      }));
+	      context.container().select('.search-header input').on('keyup.intro', checkSearchResult);
+	    }, msec + 100);
+	  }
 
-	            if (!counts[match.id]) { counts[match.id] = 0; }
-	            counts[match.id] += 1;
-	        }
+	  function checkSearchResult() {
+	    var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item
 
-	        var matches = Object.keys(counts).sort(function(p1, p2) {
-	            return counts[p2] - counts[p1];
-	        }).map(function(pID) {
-	            return _mainPresetIndex.item(pID);
-	        });
+	    var firstName = first.select('.entity-name');
+	    var name = _t('intro.graph.name.spring-street');
 
-	        // A "weak" preset doesn't set any tags. (e.g. "Address")
-	        var weakPreset = _activePresets.length === 1 &&
-	            Object.keys(_activePresets[0].addTags || {}).length === 0;
-	        // Don't replace a weak preset with a fallback preset (e.g. "Point")
-	        if (weakPreset && matches.length === 1 && matches[0].isFallback()) { return; }
+	    if (!firstName.empty() && firstName.html() === name) {
+	      reveal(first.node(), helpHtml('intro.navigation.choose_street', {
+	        name: name
+	      }), {
+	        duration: 300
+	      });
+	      context.on('exit.intro', function () {
+	        continueTo(selectedStreet);
+	      });
+	      context.container().select('.search-header input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	    }
 
-	        entityEditor.presets(matches);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    entityEditor.presets = function(val) {
-	        if (!arguments.length) { return _activePresets; }
+	  function selectedStreet() {
+	    if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+	      return searchStreet();
+	    }
 
-	        // don't reload the same preset
-	        if (!utilArrayIdentical(val, _activePresets)) {
-	            _activePresets = val;
-	        }
-	        return entityEditor;
+	    var onClick = function onClick() {
+	      continueTo(editorStreet);
 	    };
 
-	    return utilRebind(entityEditor, dispatch$1, 'on');
-	}
+	    var entity = context.entity(springStreetEndId);
+	    var box = pointBox(entity.loc, context);
+	    box.height = 500;
+	    reveal(box, helpHtml('intro.navigation.selected_street', {
+	      name: _t('intro.graph.name.spring-street')
+	    }), {
+	      duration: 600,
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro drawn.intro', function () {
+	        var entity = context.hasEntity(springStreetEndId);
+	        if (!entity) return;
+	        var box = pointBox(entity.loc, context);
+	        box.height = 500;
+	        reveal(box, helpHtml('intro.navigation.selected_street', {
+	          name: _t('intro.graph.name.spring-street')
+	        }), {
+	          duration: 0,
+	          buttonText: _t.html('intro.ok'),
+	          buttonCallback: onClick
+	        });
+	      });
+	    }, 600); // after reveal.
 
-	function uiPresetList(context) {
-	    var dispatch$1 = dispatch('cancel', 'choose');
-	    var _entityIDs;
-	    var _currentPresets;
-	    var _autofocus = false;
+	    context.on('enter.intro', function (mode) {
+	      if (!context.hasEntity(springStreetId)) {
+	        return continueTo(searchStreet);
+	      }
 
+	      var ids = context.selectedIDs();
 
-	    function presetList(selection) {
-	        if (!_entityIDs) { return; }
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== springStreetId) {
+	        // keep Spring Street selected..
+	        context.enter(modeSelect(context, [springStreetId]));
+	      }
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+	        timeout(function () {
+	          continueTo(searchStreet);
+	        }, 300); // after any transition (e.g. if user deleted intersection)
+	      }
+	    });
 
-	        var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        selection.html('');
+	  function editorStreet() {
+	    var selector = '.entity-editor-pane button.close svg use';
+	    var href = select(selector).attr('href') || '#iD-icon-close';
+	    reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
+	      button: icon(href, 'inline'),
+	      field1: onewayField.label(),
+	      field2: maxspeedField.label()
+	    }));
+	    context.on('exit.intro', function () {
+	      continueTo(play);
+	    });
+	    context.history().on('change.intro', function () {
+	      // update the close icon in the tooltip if the user edits something.
+	      var selector = '.entity-editor-pane button.close svg use';
+	      var href = select(selector).attr('href') || '#iD-icon-close';
+	      reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
+	        button: icon(href, 'inline'),
+	        field1: onewayField.label(),
+	        field2: maxspeedField.label()
+	      }), {
+	        duration: 0
+	      });
+	    });
 
-	        var messagewrap = selection
-	            .append('div')
-	            .attr('class', 'header fillL');
-
-	        var message = messagewrap
-	            .append('h3')
-	            .text(_t('inspector.choose'));
-
-	        messagewrap
-	            .append('button')
-	            .attr('class', 'preset-choose')
-	            .on('click', function() { dispatch$1.call('cancel', this); })
-	            .call(svgIcon((_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'));
-
-	        function initialKeydown() {
-	            // hack to let delete shortcut work when search is autofocused
-	            if (search.property('value').length === 0 &&
-	                (event.keyCode === utilKeybinding.keyCodes['⌫'] ||
-	                 event.keyCode === utilKeybinding.keyCodes['⌦'])) {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                operationDelete(context, _entityIDs)();
-
-	            // hack to let undo work when search is autofocused
-	            } else if (search.property('value').length === 0 &&
-	                (event.ctrlKey || event.metaKey) &&
-	                event.keyCode === utilKeybinding.keyCodes.z) {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                context.undo();
-	            } else if (!event.ctrlKey && !event.metaKey) {
-	                // don't check for delete/undo hack on future keydown events
-	                select(this).on('keydown', keydown);
-	                keydown.call(this);
-	            }
-	        }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        function keydown() {
-	            // down arrow
-	            if (event.keyCode === utilKeybinding.keyCodes['↓'] &&
-	                // if insertion point is at the end of the string
-	                search.node().selectionStart === search.property('value').length) {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                // move focus to the first item in the preset list
-	                var buttons = list.selectAll('.preset-list-button');
-	                if (!buttons.empty()) { buttons.nodes()[0].focus(); }
-	            }
-	        }
+	  function play() {
+	    dispatch$1.call('done');
+	    reveal('.ideditor', helpHtml('intro.navigation.play', {
+	      next: _t('intro.points.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-point',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	        function keypress() {
-	            // enter
-	            var value = search.property('value');
-	            if (event.keyCode === 13 && value.length) {
-	                list.selectAll('.preset-list-item:first-child')
-	                    .each(function(d) { d.choose.call(this); });
-	            }
-	        }
+	  chapter.enter = function () {
+	    dragMap();
+	  };
 
-	        function inputevent() {
-	            var value = search.property('value');
-	            list.classed('filtered', value.length);
-	            var extent = combinedEntityExtent();
-	            var results, messageText;
-	            if (value.length && extent) {
-	                var center = extent.center();
-	                var countryCode = iso1A2Code(center);
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', null);
+	    context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
+	  };
 
-	                results = presets.search(value, entityGeometries()[0], countryCode && countryCode.toLowerCase());
-	                messageText = _t('inspector.results', {
-	                    n: results.collection.length,
-	                    search: value
-	                });
-	            } else {
-	                results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro());
-	                messageText = _t('inspector.choose');
-	            }
-	            list.call(drawList, results);
-	            message.text(messageText);
-	        }
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        var searchWrap = selection
-	            .append('div')
-	            .attr('class', 'search-header');
+	  return utilRebind(chapter, dispatch$1, 'on');
+	}
 
-	        var search = searchWrap
-	            .append('input')
-	            .attr('class', 'preset-search-input')
-	            .attr('placeholder', _t('inspector.search'))
-	            .attr('type', 'search')
-	            .call(utilNoAuto)
-	            .on('keydown', initialKeydown)
-	            .on('keypress', keypress)
-	            .on('input', inputevent);
+	function uiIntroPoint(context, reveal) {
+	  var dispatch$1 = dispatch('done');
+	  var timeouts = [];
+	  var intersection = [-85.63279, 41.94394];
+	  var building = [-85.632422, 41.944045];
+	  var cafePreset = _mainPresetIndex.item('amenity/cafe');
+	  var _pointID = null;
+	  var chapter = {
+	    title: 'intro.points.title'
+	  };
 
-	        searchWrap
-	            .call(svgIcon('#iD-icon-search', 'pre-text'));
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	        if (_autofocus) {
-	            search.node().focus();
-	        }
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	        var listWrap = selection
-	            .append('div')
-	            .attr('class', 'inspector-body');
+	  function addPoint() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(intersection, context.map().center());
 
-	        var list = listWrap
-	            .append('div')
-	            .attr('class', 'preset-list')
-	            .call(drawList, _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro()));
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
+
+	    context.map().centerZoomEase(intersection, 19, msec);
+	    timeout(function () {
+	      var tooltip = reveal('button.add-point', helpHtml('intro.points.points_info') + '{br}' + helpHtml('intro.points.add_point'));
+	      _pointID = null;
+	      tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-points');
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-point') return;
+	        continueTo(placePoint);
+	      });
+	    }, msec + 100);
 
-	        context.features().on('change.preset-list', updateForFeatureHiddenState);
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function placePoint() {
+	    if (context.mode().id !== 'add-point') {
+	      return chapter.restart();
+	    }
 
-	    function drawList(list, presets) {
-	        presets = presets.matchAllGeometry(entityGeometries());
-	        var collection = presets.collection.reduce(function(collection, preset) {
-	            if (!preset) { return collection; }
+	    var pointBox = pad(building, 150, context);
+	    var textId = context.lastPointerType() === 'mouse' ? 'place_point' : 'place_point_touch';
+	    reveal(pointBox, helpHtml('intro.points.' + textId));
+	    context.map().on('move.intro drawn.intro', function () {
+	      pointBox = pad(building, 150, context);
+	      reveal(pointBox, helpHtml('intro.points.' + textId), {
+	        duration: 0
+	      });
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') return chapter.restart();
+	      _pointID = context.mode().selectedIDs()[0];
+	      continueTo(searchPreset);
+	    });
 
-	            if (preset.members) {
-	                if (preset.members.collection.filter(function(preset) {
-	                    return preset.addable();
-	                }).length > 1) {
-	                    collection.push(CategoryItem(preset));
-	                }
-	            } else if (preset.addable()) {
-	                collection.push(PresetItem(preset));
-	            }
-	            return collection;
-	        }, []);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var items = list.selectAll('.preset-list-item')
-	            .data(collection, function(d) { return d.preset.id; });
+	  function searchPreset() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    } // disallow scrolling
 
-	        items.order();
 
-	        items.exit()
-	            .remove();
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	    reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
+	      preset: cafePreset.name()
+	    }));
+	    context.on('enter.intro', function (mode) {
+	      if (!_pointID || !context.hasEntity(_pointID)) {
+	        return continueTo(addPoint);
+	      }
 
-	        items.enter()
-	            .append('div')
-	            .attr('class', function(item) { return 'preset-list-item preset-' + item.preset.id.replace('/', '-'); })
-	            .classed('current', function(item) { return _currentPresets.indexOf(item.preset) !== -1; })
-	            .each(function(item) { select(this).call(item); })
-	            .style('opacity', 0)
-	            .transition()
-	            .style('opacity', 1);
-
-	        updateForFeatureHiddenState();
-	    }
-
-	    function itemKeydown(){
-	        // the actively focused item
-	        var item = select(this.closest('.preset-list-item'));
-	        var parentItem = select(item.node().parentNode.closest('.preset-list-item'));
-
-	        // arrow down, move focus to the next, lower item
-	        if (event.keyCode === utilKeybinding.keyCodes['↓']) {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            // the next item in the list at the same level
-	            var nextItem = select(item.node().nextElementSibling);
-	            // if there is no next item in this list
-	            if (nextItem.empty()) {
-	                // if there is a parent item
-	                if (!parentItem.empty()) {
-	                    // the item is the last item of a sublist,
-	                    // select the next item at the parent level
-	                    nextItem = select(parentItem.node().nextElementSibling);
-	                }
-	            // if the focused item is expanded
-	            } else if (select(this).classed('expanded')) {
-	                // select the first subitem instead
-	                nextItem = item.select('.subgrid .preset-list-item:first-child');
-	            }
-	            if (!nextItem.empty()) {
-	                // focus on the next item
-	                nextItem.select('.preset-list-button').node().focus();
-	            }
+	      var ids = context.selectedIDs();
 
-	        // arrow up, move focus to the previous, higher item
-	        } else if (event.keyCode === utilKeybinding.keyCodes['↑']) {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            // the previous item in the list at the same level
-	            var previousItem = select(item.node().previousElementSibling);
-
-	            // if there is no previous item in this list
-	            if (previousItem.empty()) {
-	                // if there is a parent item
-	                if (!parentItem.empty()) {
-	                    // the item is the first subitem of a sublist select the parent item
-	                    previousItem = parentItem;
-	                }
-	            // if the previous item is expanded
-	            } else if (previousItem.select('.preset-list-button').classed('expanded')) {
-	                // select the last subitem of the sublist of the previous item
-	                previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
-	            }
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
+	        // keep the user's point selected..
+	        context.enter(modeSelect(context, [_pointID])); // disallow scrolling
 
-	            if (!previousItem.empty()) {
-	                // focus on the previous item
-	                previousItem.select('.preset-list-button').node().focus();
-	            } else {
-	                // the focus is at the top of the list, move focus back to the search field
-	                var search = select(this.closest('.preset-list-pane')).select('.preset-search-input');
-	                search.node().focus();
-	            }
+	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	        context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	        reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
+	          preset: cafePreset.name()
+	        }));
+	        context.history().on('change.intro', null);
+	      }
+	    });
 
-	        // arrow left, move focus to the parent item if there is one
-	        } else if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '→' : '←']) {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            // if there is a parent item, focus on the parent item
-	            if (!parentItem.empty()) {
-	                parentItem.select('.preset-list-button').node().focus();
-	            }
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	        // arrow right, choose this item
-	        } else if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '←' : '→']) {
-	            event.preventDefault();
-	            event.stopPropagation();
-	            item.datum().choose.call(select(this).node());
-	        }
+	      if (first.classed('preset-amenity-cafe')) {
+	        context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	        reveal(first.select('.preset-list-button').node(), helpHtml('intro.points.choose_cafe', {
+	          preset: cafePreset.name()
+	        }), {
+	          duration: 300
+	        });
+	        context.history().on('change.intro', function () {
+	          continueTo(aboutFeatureEditor);
+	        });
+	      }
 	    }
 
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    function CategoryItem(preset) {
-	        var box, sublist, shown = false;
-
-	        function item(selection) {
-	            var wrap = selection.append('div')
-	                .attr('class', 'preset-list-button-wrap category');
+	  function aboutFeatureEditor() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    }
 
-	            function click() {
-	                var isExpanded = select(this).classed('expanded');
-	                var iconName = isExpanded ?
-	                    (_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward') : '#iD-icon-down';
-	                select(this)
-	                    .classed('expanded', !isExpanded);
-	                select(this).selectAll('div.label-inner svg.icon use')
-	                    .attr('href', iconName);
-	                item.choose();
-	            }
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.points.feature_editor'), {
+	        tooltipClass: 'intro-points-describe',
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: function buttonCallback() {
+	          continueTo(addName);
+	        }
+	      });
+	    }, 400);
+	    context.on('exit.intro', function () {
+	      // if user leaves select mode here, just continue with the tutorial.
+	      continueTo(reselectPoint);
+	    });
 
-	            var geometries = entityGeometries();
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            var button = wrap
-	                .append('button')
-	                .attr('class', 'preset-list-button')
-	                .classed('expanded', false)
-	                .call(uiPresetIcon()
-	                    .geometry(geometries.length === 1 && geometries[0])
-	                    .preset(preset))
-	                .on('click', click)
-	                .on('keydown', function() {
-	                    // right arrow, expand the focused item
-	                    if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '←' : '→']) {
-	                        event.preventDefault();
-	                        event.stopPropagation();
-	                        // if the item isn't expanded
-	                        if (!select(this).classed('expanded')) {
-	                            // toggle expansion (expand the item)
-	                            click.call(this);
-	                        }
-	                    // left arrow, collapse the focused item
-	                    } else if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '→' : '←']) {
-	                        event.preventDefault();
-	                        event.stopPropagation();
-	                        // if the item is expanded
-	                        if (select(this).classed('expanded')) {
-	                            // toggle expansion (collapse the item)
-	                            click.call(this);
-	                        }
-	                    } else {
-	                        itemKeydown.call(this);
-	                    }
-	                });
+	  function addName() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    } // reset pane, in case user happened to change it..
 
-	            var label = button
-	                .append('div')
-	                .attr('class', 'label')
-	                .append('div')
-	                .attr('class', 'label-inner');
 
-	            label
-	                .append('div')
-	                .attr('class', 'namepart')
-	                .call(svgIcon((_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'))
-	                .append('span')
-	                .html(function() { return preset.name() + '&hellip;'; });
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    var addNameString = helpHtml('intro.points.fields_info') + '{br}' + helpHtml('intro.points.add_name');
+	    timeout(function () {
+	      // It's possible for the user to add a name in a previous step..
+	      // If so, don't tell them to add the name in this step.
+	      // Give them an OK button instead.
+	      var entity = context.entity(_pointID);
 
-	            box = selection.append('div')
-	                .attr('class', 'subgrid')
-	                .style('max-height', '0px')
-	                .style('opacity', 0);
+	      if (entity.tags.name) {
+	        var tooltip = reveal('.entity-editor-pane', addNameString, {
+	          tooltipClass: 'intro-points-describe',
+	          buttonText: _t.html('intro.ok'),
+	          buttonCallback: function buttonCallback() {
+	            continueTo(addCloseEditor);
+	          }
+	        });
+	        tooltip.select('.instruction').style('display', 'none');
+	      } else {
+	        reveal('.entity-editor-pane', addNameString, {
+	          tooltipClass: 'intro-points-describe'
+	        });
+	      }
+	    }, 400);
+	    context.history().on('change.intro', function () {
+	      continueTo(addCloseEditor);
+	    });
+	    context.on('exit.intro', function () {
+	      // if user leaves select mode here, just continue with the tutorial.
+	      continueTo(reselectPoint);
+	    });
 
-	            box.append('div')
-	                .attr('class', 'arrow');
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            sublist = box.append('div')
-	                .attr('class', 'preset-list fillL3');
-	        }
+	  function addCloseEditor() {
+	    // reset pane, in case user happened to change it..
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    var selector = '.entity-editor-pane button.close svg use';
+	    var href = select(selector).attr('href') || '#iD-icon-close';
+	    context.on('exit.intro', function () {
+	      continueTo(reselectPoint);
+	    });
+	    reveal('.entity-editor-pane', helpHtml('intro.points.add_close', {
+	      button: icon(href, 'inline')
+	    }));
 
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        item.choose = function() {
-	            if (!box || !sublist) { return; }
+	  function reselectPoint() {
+	    if (!_pointID) return chapter.restart();
+	    var entity = context.hasEntity(_pointID);
+	    if (!entity) return chapter.restart(); // make sure it's still a cafe, in case user somehow changed it..
 
-	            if (shown) {
-	                shown = false;
-	                box.transition()
-	                    .duration(200)
-	                    .style('opacity', '0')
-	                    .style('max-height', '0px')
-	                    .style('padding-bottom', '0px');
-	            } else {
-	                shown = true;
-	                var members = preset.members.matchAllGeometry(entityGeometries());
-	                sublist.call(drawList, members);
-	                box.transition()
-	                    .duration(200)
-	                    .style('opacity', '1')
-	                    .style('max-height', 200 + members.collection.length * 190 + 'px')
-	                    .style('padding-bottom', '10px');
-	            }
-	        };
+	    var oldPreset = _mainPresetIndex.match(entity, context.graph());
+	    context.replace(actionChangePreset(_pointID, oldPreset, cafePreset));
+	    context.enter(modeBrowse(context));
+	    var msec = transitionTime(entity.loc, context.map().center());
 
-	        item.preset = preset;
-	        return item;
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    context.map().centerEase(entity.loc, msec);
+	    timeout(function () {
+	      var box = pointBox(entity.loc, context);
+	      reveal(box, helpHtml('intro.points.reselect'), {
+	        duration: 600
+	      });
+	      timeout(function () {
+	        context.map().on('move.intro drawn.intro', function () {
+	          var entity = context.hasEntity(_pointID);
+	          if (!entity) return chapter.restart();
+	          var box = pointBox(entity.loc, context);
+	          reveal(box, helpHtml('intro.points.reselect'), {
+	            duration: 0
+	          });
+	        });
+	      }, 600); // after reveal..
 
-	    function PresetItem(preset) {
-	        function item(selection) {
-	            var wrap = selection.append('div')
-	                .attr('class', 'preset-list-button-wrap');
-
-	            var geometries = entityGeometries();
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'select') return;
+	        continueTo(updatePoint);
+	      });
+	    }, msec + 100);
 
-	            var button = wrap.append('button')
-	                .attr('class', 'preset-list-button')
-	                .call(uiPresetIcon()
-	                    .geometry(geometries.length === 1 && geometries[0])
-	                    .preset(preset))
-	                .on('click', item.choose)
-	                .on('keydown', itemKeydown);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            var label = button
-	                .append('div')
-	                .attr('class', 'label')
-	                .append('div')
-	                .attr('class', 'label-inner');
+	  function updatePoint() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return continueTo(reselectPoint);
+	    } // reset pane, in case user happened to untag the point..
 
-	            // NOTE: split/join on en-dash, not a hypen (to avoid conflict with fr - nl names in Brussels etc)
-	            label.selectAll('.namepart')
-	                .data(preset.name().split(' – '))
-	                .enter()
-	                .append('div')
-	                .attr('class', 'namepart')
-	                .text(function(d) { return d; });
 
-	            wrap.call(item.reference.button);
-	            selection.call(item.reference.body);
-	        }
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    context.on('exit.intro', function () {
+	      continueTo(reselectPoint);
+	    });
+	    context.history().on('change.intro', function () {
+	      continueTo(updateCloseEditor);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.points.update'), {
+	        tooltipClass: 'intro-points-describe'
+	      });
+	    }, 400);
 
-	        item.choose = function() {
-	            if (select(this).classed('disabled')) { return; }
-	            if (!context.inIntro()) {
-	                _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
-	            }
-	            context.perform(
-	                function(graph) {
-	                    for (var i in _entityIDs) {
-	                        var entityID = _entityIDs[i];
-	                        var oldPreset = _mainPresetIndex.match(graph.entity(entityID), graph);
-	                        graph = actionChangePreset(entityID, oldPreset, preset)(graph);
-	                    }
-	                    return graph;
-	                },
-	                _t('operations.change_tags.annotation')
-	            );
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            context.validator().validate();  // rerun validation
-	            dispatch$1.call('choose', this, preset);
-	        };
+	  function updateCloseEditor() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return continueTo(reselectPoint);
+	    } // reset pane, in case user happened to change it..
 
-	        item.help = function() {
-	            event.stopPropagation();
-	            item.reference.toggle();
-	        };
 
-	        item.preset = preset;
-	        item.reference = uiTagReference(preset.reference(entityGeometries()[0]));
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    context.on('exit.intro', function () {
+	      continueTo(rightClickPoint);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.points.update_close', {
+	        button: icon('#iD-icon-close', 'inline')
+	      }));
+	    }, 500);
 
-	        return item;
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function rightClickPoint() {
+	    if (!_pointID) return chapter.restart();
+	    var entity = context.hasEntity(_pointID);
+	    if (!entity) return chapter.restart();
+	    context.enter(modeBrowse(context));
+	    var box = pointBox(entity.loc, context);
+	    var textId = context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch';
+	    reveal(box, helpHtml('intro.points.' + textId), {
+	      duration: 600
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro', function () {
+	        var entity = context.hasEntity(_pointID);
+	        if (!entity) return chapter.restart();
+	        var box = pointBox(entity.loc, context);
+	        reveal(box, helpHtml('intro.points.' + textId), {
+	          duration: 0
+	        });
+	      });
+	    }, 600); // after reveal
 
-	    function updateForFeatureHiddenState() {
-	        if (!_entityIDs.every(context.hasEntity)) { return; }
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') return;
+	      var ids = context.selectedIDs();
+	      if (ids.length !== 1 || ids[0] !== _pointID) return;
+	      timeout(function () {
+	        var node = selectMenuItem(context, 'delete').node();
+	        if (!node) return;
+	        continueTo(enterDelete);
+	      }, 50); // after menu visible
+	    });
 
-	        var geometries = entityGeometries();
-	        var button = context.container().selectAll('.preset-list .preset-list-button');
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        // remove existing tooltips
-	        button.call(uiTooltip().destroyAny);
+	  function enterDelete() {
+	    if (!_pointID) return chapter.restart();
+	    var entity = context.hasEntity(_pointID);
+	    if (!entity) return chapter.restart();
+	    var node = selectMenuItem(context, 'delete').node();
 
-	        button.each(function(item, index) {
-	            var hiddenPresetFeaturesId;
-	            for (var i in geometries) {
-	                hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
-	                if (hiddenPresetFeaturesId) { break; }
-	            }
-	            var isHiddenPreset = !context.inIntro() &&
-	                !!hiddenPresetFeaturesId &&
-	                (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
-
-	            select(this)
-	                .classed('disabled', isHiddenPreset);
-
-	            if (isHiddenPreset) {
-	                var isAutoHidden = context.features().autoHidden(hiddenPresetFeaturesId);
-	                var tooltipIdSuffix = isAutoHidden ? 'zoom' : 'manual';
-	                var tooltipObj = { features: _t('feature.' + hiddenPresetFeaturesId + '.description') };
-	                select(this).call(uiTooltip()
-	                    .title(_t('inspector.hidden_preset.' + tooltipIdSuffix, tooltipObj))
-	                    .placement(index < 2 ? 'bottom' : 'top')
-	                );
-	            }
-	        });
+	    if (!node) {
+	      return continueTo(rightClickPoint);
 	    }
 
-	    presetList.autofocus = function(val) {
-	        if (!arguments.length) { return _autofocus; }
-	        _autofocus = val;
-	        return presetList;
-	    };
-
-	    presetList.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        if (_entityIDs && _entityIDs.length) {
-	            var presets = _entityIDs.map(function(entityID) {
-	                return _mainPresetIndex.match(context.entity(entityID), context.graph());
-	            });
-	            presetList.presets(presets);
-	        }
-	        return presetList;
-	    };
+	    reveal('.edit-menu', helpHtml('intro.points.delete'), {
+	      padding: 50
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro', function () {
+	        reveal('.edit-menu', helpHtml('intro.points.delete'), {
+	          duration: 0,
+	          padding: 50
+	        });
+	      });
+	    }, 300); // after menu visible
 
-	    presetList.presets = function(val) {
-	        if (!arguments.length) { return _currentPresets; }
-	        _currentPresets = val;
-	        return presetList;
-	    };
+	    context.on('exit.intro', function () {
+	      if (!_pointID) return chapter.restart();
+	      var entity = context.hasEntity(_pointID);
+	      if (entity) return continueTo(rightClickPoint); // point still exists
+	    });
+	    context.history().on('change.intro', function (changed) {
+	      if (changed.deleted().length) {
+	        continueTo(undo);
+	      }
+	    });
 
-	    function entityGeometries() {
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var counts = {};
+	  function undo() {
+	    context.history().on('change.intro', function () {
+	      continueTo(play);
+	    });
+	    reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));
 
-	        for (var i in _entityIDs) {
-	            var entityID = _entityIDs[i];
-	            var entity = context.entity(entityID);
-	            var geometry = entity.geometry(context.graph());
+	    function continueTo(nextStep) {
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            // Treat entities on addr:interpolation lines as points, not vertices (#3241)
-	            if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
-	                geometry = 'point';
-	            }
+	  function play() {
+	    dispatch$1.call('done');
+	    reveal('.ideditor', helpHtml('intro.points.play', {
+	      next: _t('intro.areas.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-area',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	            if (!counts[geometry]) { counts[geometry] = 0; }
-	            counts[geometry] += 1;
-	        }
+	  chapter.enter = function () {
+	    addPoint();
+	  };
 
-	        return Object.keys(counts).sort(function(geom1, geom2) {
-	            return counts[geom2] - counts[geom1];
-	        });
-	    }
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	  };
 
-	    function combinedEntityExtent() {
-	        return _entityIDs.reduce(function(extent, entityID) {
-	            var entity = context.graph().entity(entityID);
-	            return extent.extend(entity.extent(context.graph()));
-	        }, geoExtent());
-	    }
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	    return utilRebind(presetList, dispatch$1, 'on');
+	  return utilRebind(chapter, dispatch$1, 'on');
 	}
 
-	function uiInspector(context) {
-	    var presetList = uiPresetList(context);
-	    var entityEditor = uiEntityEditor(context);
-	    var wrap = select(null),
-	        presetPane = select(null),
-	        editorPane = select(null);
-	    var _state = 'select';
-	    var _entityIDs;
-	    var _newFeature = false;
-
-
-	    function inspector(selection) {
-	        presetList
-	            .entityIDs(_entityIDs)
-	            .autofocus(_newFeature)
-	            .on('choose', inspector.setPreset)
-	            .on('cancel', function() {
-	                wrap.transition()
-	                    .styleTween('right', function() { return interpolate('-100%', '0%'); });
-	                editorPane.call(entityEditor);
-	            });
-
-	        entityEditor
-	            .state(_state)
-	            .entityIDs(_entityIDs)
-	            .on('choose', inspector.showList);
+	function uiIntroArea(context, reveal) {
+	  var dispatch$1 = dispatch('done');
+	  var playground = [-85.63552, 41.94159];
+	  var playgroundPreset = _mainPresetIndex.item('leisure/playground');
+	  var nameField = _mainPresetIndex.field('name');
+	  var descriptionField = _mainPresetIndex.field('description');
+	  var timeouts = [];
 
-	        wrap = selection.selectAll('.panewrap')
-	            .data([0]);
+	  var _areaID;
 
-	        var enter = wrap.enter()
-	            .append('div')
-	            .attr('class', 'panewrap');
+	  var chapter = {
+	    title: 'intro.areas.title'
+	  };
 
-	        enter
-	            .append('div')
-	            .attr('class', 'preset-list-pane pane');
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	        enter
-	            .append('div')
-	            .attr('class', 'entity-editor-pane pane');
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	        wrap = wrap.merge(enter);
-	        presetPane = wrap.selectAll('.preset-list-pane');
-	        editorPane = wrap.selectAll('.entity-editor-pane');
+	  function revealPlayground(center, text, options) {
+	    var padding = 180 * Math.pow(2, context.map().zoom() - 19.5);
+	    var box = pad(center, padding, context);
+	    reveal(box, text, options);
+	  }
 
-	        function shouldDefaultToPresetList() {
-	            // always show the inspector on hover
-	            if (_state !== 'select') { return false; }
+	  function addArea() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    _areaID = null;
+	    var msec = transitionTime(playground, context.map().center());
 
-	            // can only change preset on single selection
-	            if (_entityIDs.length !== 1) { return false; }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	            var entityID = _entityIDs[0];
-	            var entity = context.hasEntity(entityID);
-	            if (!entity) { return false; }
+	    context.map().centerZoomEase(playground, 19, msec);
+	    timeout(function () {
+	      var tooltip = reveal('button.add-area', helpHtml('intro.areas.add_playground'));
+	      tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-areas');
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-area') return;
+	        continueTo(startPlayground);
+	      });
+	    }, msec + 100);
 
-	            // default to inspector if there are already tags
-	            if (entity.hasNonGeometryTags()) { return false; }
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            // prompt to select preset if feature is new and untagged
-	            if (_newFeature) { return true; }
+	  function startPlayground() {
+	    if (context.mode().id !== 'add-area') {
+	      return chapter.restart();
+	    }
 
-	            // all existing features except vertices should default to inspector
-	            if (entity.geometry(context.graph()) !== 'vertex') { return false; }
+	    _areaID = null;
+	    context.map().zoomEase(19.5, 500);
+	    timeout(function () {
+	      var textId = context.lastPointerType() === 'mouse' ? 'starting_node_click' : 'starting_node_tap';
+	      var startDrawString = helpHtml('intro.areas.start_playground') + helpHtml('intro.areas.' + textId);
+	      revealPlayground(playground, startDrawString, {
+	        duration: 250
+	      });
+	      timeout(function () {
+	        context.map().on('move.intro drawn.intro', function () {
+	          revealPlayground(playground, startDrawString, {
+	            duration: 0
+	          });
+	        });
+	        context.on('enter.intro', function (mode) {
+	          if (mode.id !== 'draw-area') return chapter.restart();
+	          continueTo(continuePlayground);
+	        });
+	      }, 250); // after reveal
+	    }, 550); // after easing
 
-	            // show vertex relations if any
-	            if (context.graph().parentRelations(entity).length) { return false; }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            // show vertex issues if there are any
-	            if (context.validator().getEntityIssues(entityID).length) { return false; }
+	  function continuePlayground() {
+	    if (context.mode().id !== 'draw-area') {
+	      return chapter.restart();
+	    }
 
-	            // show turn retriction editor for junction vertices
-	            if (entity.isHighwayIntersection(context.graph())) { return false; }
+	    _areaID = null;
+	    revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
+	      duration: 250
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
+	          duration: 0
+	        });
+	      });
+	    }, 250); // after reveal
 
-	            // otherwise show preset list for uninteresting vertices
-	            return true;
-	        }
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-area') {
+	        var entity = context.hasEntity(context.selectedIDs()[0]);
 
-	        if (shouldDefaultToPresetList()) {
-	            wrap.style('right', '-100%');
-	            presetPane.call(presetList);
+	        if (entity && entity.nodes.length >= 6) {
+	          return continueTo(finishPlayground);
 	        } else {
-	            wrap.style('right', '0%');
-	            editorPane.call(entityEditor);
+	          return;
 	        }
+	      } else if (mode.id === 'select') {
+	        _areaID = context.selectedIDs()[0];
+	        return continueTo(searchPresets);
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	        var footer = selection.selectAll('.footer')
-	            .data([0]);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        footer = footer.enter()
-	            .append('div')
-	            .attr('class', 'footer')
-	            .merge(footer);
+	  function finishPlayground() {
+	    if (context.mode().id !== 'draw-area') {
+	      return chapter.restart();
+	    }
+
+	    _areaID = null;
+	    var finishString = helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.areas.finish_playground');
+	    revealPlayground(playground, finishString, {
+	      duration: 250
+	    });
+	    timeout(function () {
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealPlayground(playground, finishString, {
+	          duration: 0
+	        });
+	      });
+	    }, 250); // after reveal
+
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-area') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        _areaID = context.selectedIDs()[0];
+	        return continueTo(searchPresets);
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
+
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        footer
-	            .call(uiViewOnOSM(context)
-	                .what(context.hasEntity(_entityIDs.length === 1 && _entityIDs[0]))
-	            );
+	  function searchPresets() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
 	    }
 
-	    inspector.showList = function(presets) {
+	    var ids = context.selectedIDs();
 
-	        wrap.transition()
-	            .styleTween('right', function() { return interpolate('0%', '-100%'); });
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      context.enter(modeSelect(context, [_areaID]));
+	    } // disallow scrolling
 
-	        if (presets) {
-	            presetList.presets(presets);
-	        }
 
-	        presetPane
-	            .call(presetList.autofocus(true));
-	    };
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	      reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
+	        preset: playgroundPreset.name()
+	      }));
+	    }, 400); // after preset list pane visible..
 
-	    inspector.setPreset = function(preset) {
+	    context.on('enter.intro', function (mode) {
+	      if (!_areaID || !context.hasEntity(_areaID)) {
+	        return continueTo(addArea);
+	      }
 
-	        // upon setting multipolygon, go to the area preset list instead of the editor
-	        if (preset.id === 'type/multipolygon') {
-	            presetPane
-	                .call(presetList.autofocus(true));
+	      var ids = context.selectedIDs();
 
-	        } else {
-	            wrap.transition()
-	                .styleTween('right', function() { return interpolate('-100%', '0%'); });
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	        // keep the user's area selected..
+	        context.enter(modeSelect(context, [_areaID])); // reset pane, in case user somehow happened to change it..
 
-	            editorPane
-	                .call(entityEditor.presets([preset]));
-	        }
+	        context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
-	    };
+	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	        context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	        reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
+	          preset: playgroundPreset.name()
+	        }));
+	        context.history().on('change.intro', null);
+	      }
+	    });
 
-	    inspector.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        entityEditor.state(_state);
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	        // remove any old field help overlay that might have gotten attached to the inspector
-	        context.container().selectAll('.field-help-body').remove();
+	      if (first.classed('preset-leisure-playground')) {
+	        reveal(first.select('.preset-list-button').node(), helpHtml('intro.areas.choose_playground', {
+	          preset: playgroundPreset.name()
+	        }), {
+	          duration: 300
+	        });
+	        context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	        context.history().on('change.intro', function () {
+	          continueTo(clickAddField);
+	        });
+	      }
+	    }
 
-	        return inspector;
-	    };
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function clickAddField() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	    inspector.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return inspector;
-	    };
+	    var ids = context.selectedIDs();
 
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    }
 
-	    inspector.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return inspector;
-	    };
+	    if (!context.container().select('.form-field-description').empty()) {
+	      return continueTo(describePlayground);
+	    } // disallow scrolling
 
 
-	    return inspector;
-	}
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // It's possible for the user to add a description in a previous step..
+	      // If they did this already, just continue to next step.
 
-	function uiSidebar(context) {
-	    var inspector = uiInspector(context);
-	    var dataEditor = uiDataEditor(context);
-	    var noteEditor = uiNoteEditor(context);
-	    var improveOsmEditor = uiImproveOsmEditor(context);
-	    var keepRightEditor = uiKeepRightEditor(context);
-	    var osmoseEditor = uiOsmoseEditor(context);
-	    var _current;
-	    var _wasData = false;
-	    var _wasNote = false;
-	    var _wasQaItem = false;
-
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-
-	    function sidebar(selection) {
-	        var container = context.container();
-	        var minWidth = 240;
-	        var sidebarWidth;
-	        var containerWidth;
-	        var dragOffset;
-
-	        // Set the initial width constraints
-	        selection
-	            .style('min-width', minWidth + 'px')
-	            .style('max-width', '400px')
-	            .style('width', '33.3333%');
-
-	        var resizer = selection
-	            .append('div')
-	            .attr('class', 'sidebar-resizer')
-	            .on(_pointerPrefix + 'down.sidebar-resizer', pointerdown);
+	      var entity = context.entity(_areaID);
 
-	        var downPointerId, lastClientX, containerLocGetter;
+	      if (entity.tags.description) {
+	        return continueTo(play);
+	      } // scroll "Add field" into view
 
-	        function pointerdown() {
-	            if (downPointerId) { return; }
 
-	            if ('button' in event && event.button !== 0) { return; }
+	      var box = context.container().select('.more-fields').node().getBoundingClientRect();
 
-	            downPointerId = event.pointerId || 'mouse';
+	      if (box.top > 300) {
+	        var pane = context.container().select('.entity-editor-pane .inspector-body');
+	        var start = pane.node().scrollTop;
+	        var end = start + (box.top - 300);
+	        pane.transition().duration(250).tween('scroll.inspector', function () {
+	          var node = this;
+	          var i = d3_interpolateNumber(start, end);
+	          return function (t) {
+	            node.scrollTop = i(t);
+	          };
+	        });
+	      }
+
+	      timeout(function () {
+	        reveal('.more-fields .combobox-input', helpHtml('intro.areas.add_field', {
+	          name: nameField.label(),
+	          description: descriptionField.label()
+	        }), {
+	          duration: 300
+	        });
+	        context.container().select('.more-fields .combobox-input').on('click.intro', function () {
+	          // Watch for the combobox to appear...
+	          var watcher;
+	          watcher = window.setInterval(function () {
+	            if (!context.container().select('div.combobox').empty()) {
+	              window.clearInterval(watcher);
+	              continueTo(chooseDescriptionField);
+	            }
+	          }, 300);
+	        });
+	      }, 300); // after "Add Field" visible
+	    }, 400); // after editor pane visible
 
-	            lastClientX = event.clientX;
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
 
-	            containerLocGetter = utilFastMouse(container.node());
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.more-fields .combobox-input').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            // offset from edge of sidebar-resizer
-	            dragOffset = utilFastMouse(resizer.node())(event)[0] - 1;
+	  function chooseDescriptionField() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	            sidebarWidth = selection.node().getBoundingClientRect().width;
-	            containerWidth = container.node().getBoundingClientRect().width;
-	            var widthPct = (sidebarWidth / containerWidth) * 100;
-	            selection
-	                .style('width', widthPct + '%')    // lock in current width
-	                .style('max-width', '85%');        // but allow larger widths
+	    var ids = context.selectedIDs();
 
-	            resizer.classed('dragging', true);
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    }
 
-	            select(window)
-	                .on('touchmove.sidebar-resizer', function() {
-	                    // disable page scrolling while resizing on touch input
-	                    event.preventDefault();
-	                }, { passive: false })
-	                .on(_pointerPrefix + 'move.sidebar-resizer', pointermove)
-	                .on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', pointerup);
-	        }
+	    if (!context.container().select('.form-field-description').empty()) {
+	      return continueTo(describePlayground);
+	    } // Make sure combobox is ready..
 
-	        function pointermove() {
 
-	            if (downPointerId !== (event.pointerId || 'mouse')) { return; }
+	    if (context.container().select('div.combobox').empty()) {
+	      return continueTo(clickAddField);
+	    } // Watch for the combobox to go away..
 
-	            event.preventDefault();
 
-	            var dx = event.clientX - lastClientX;
+	    var watcher;
+	    watcher = window.setInterval(function () {
+	      if (context.container().select('div.combobox').empty()) {
+	        window.clearInterval(watcher);
+	        timeout(function () {
+	          if (context.container().select('.form-field-description').empty()) {
+	            continueTo(retryChooseDescription);
+	          } else {
+	            continueTo(describePlayground);
+	          }
+	        }, 300); // after description field added.
+	      }
+	    }, 300);
+	    reveal('div.combobox', helpHtml('intro.areas.choose_field', {
+	      field: descriptionField.label()
+	    }), {
+	      duration: 300
+	    });
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
 
-	            lastClientX = event.clientX;
+	    function continueTo(nextStep) {
+	      if (watcher) window.clearInterval(watcher);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            var isRTL = (_mainLocalizer.textDirection() === 'rtl');
-	            var scaleX = isRTL ? 0 : 1;
-	            var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	  function describePlayground() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	            var x = containerLocGetter(event)[0] - dragOffset;
-	            sidebarWidth = isRTL ? containerWidth - x : x;
+	    var ids = context.selectedIDs();
 
-	            var isCollapsed = selection.classed('collapsed');
-	            var shouldCollapse = sidebarWidth < minWidth;
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    } // reset pane, in case user happened to change it..
 
-	            selection.classed('collapsed', shouldCollapse);
 
-	            if (shouldCollapse) {
-	                if (!isCollapsed) {
-	                    selection
-	                        .style(xMarginProperty, '-400px')
-	                        .style('width', '400px');
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
 
-	                    context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);
-	                }
+	    if (context.container().select('.form-field-description').empty()) {
+	      return continueTo(retryChooseDescription);
+	    }
 
-	            } else {
-	                var widthPct = (sidebarWidth / containerWidth) * 100;
-	                selection
-	                    .style(xMarginProperty, null)
-	                    .style('width', widthPct + '%');
-
-	                if (isCollapsed) {
-	                    context.ui().onResize([-sidebarWidth * scaleX, 0]);
-	                } else {
-	                    context.ui().onResize([-dx * scaleX, 0]);
-	                }
-	            }
-	        }
+	    context.on('exit.intro', function () {
+	      continueTo(play);
+	    });
+	    reveal('.entity-editor-pane', helpHtml('intro.areas.describe_playground', {
+	      button: icon('#iD-icon-close', 'inline')
+	    }), {
+	      duration: 300
+	    });
 
-	        function pointerup() {
-	            if (downPointerId !== (event.pointerId || 'mouse')) { return; }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            downPointerId = null;
+	  function retryChooseDescription() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	            resizer.classed('dragging', false);
+	    var ids = context.selectedIDs();
 
-	            select(window)
-	                .on('touchmove.sidebar-resizer', null)
-	                .on(_pointerPrefix + 'move.sidebar-resizer', null)
-	                .on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', null);
-	        }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    } // reset pane, in case user happened to change it..
 
-	        var featureListWrap = selection
-	            .append('div')
-	            .attr('class', 'feature-list-pane')
-	            .call(uiFeatureList(context));
 
-	        var inspectorWrap = selection
-	            .append('div')
-	            .attr('class', 'inspector-hidden inspector-wrap');
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    reveal('.entity-editor-pane', helpHtml('intro.areas.retry_add_field', {
+	      field: descriptionField.label()
+	    }), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(clickAddField);
+	      }
+	    });
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
 
-	        var hoverModeSelect = function(targets) {
-	            context.container().selectAll('.feature-list-item').classed('hover', false);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            if (context.selectedIDs().length > 1 &&
-	                targets && targets.length) {
+	  function play() {
+	    dispatch$1.call('done');
+	    reveal('.ideditor', helpHtml('intro.areas.play', {
+	      next: _t('intro.lines.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-line',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	                var elements = context.container().selectAll('.feature-list-item')
-	                    .filter(function (node) {
-	                        return targets.indexOf(node) !== -1;
-	                    });
+	  chapter.enter = function () {
+	    addArea();
+	  };
 
-	                if (!elements.empty()) {
-	                    elements.classed('hover', true);
-	                }
-	            }
-	        };
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', null);
+	    context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	    context.container().select('.more-fields .combobox-input').on('click.intro', null);
+	  };
 
-	        sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        function hover(targets) {
-	            var datum = targets && targets.length && targets[0];
-	            if (datum && datum.__featurehash__) {   // hovering on data
-	                _wasData = true;
-	                sidebar
-	                    .show(dataEditor.datum(datum));
+	  return utilRebind(chapter, dispatch$1, 'on');
+	}
 
-	                selection.selectAll('.sidebar-component')
-	                    .classed('inspector-hover', true);
+	function uiIntroLine(context, reveal) {
+	  var dispatch$1 = dispatch('done');
+	  var timeouts = [];
+	  var _tulipRoadID = null;
+	  var flowerRoadID = 'w646';
+	  var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
+	  var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
+	  var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
+	  var roadCategory = _mainPresetIndex.item('category-road_minor');
+	  var residentialPreset = _mainPresetIndex.item('highway/residential');
+	  var woodRoadID = 'w525';
+	  var woodRoadEndID = 'n2862';
+	  var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
+	  var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
+	  var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
+	  var washingtonStreetID = 'w522';
+	  var twelfthAvenueID = 'w1';
+	  var eleventhAvenueEndID = 'n3550';
+	  var twelfthAvenueEndID = 'n5';
+	  var _washingtonSegmentID = null;
+	  var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
+	  var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
+	  var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
+	  var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
+	  var chapter = {
+	    title: 'intro.lines.title'
+	  };
+
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
+
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
+
+	  function addLine() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(tulipRoadStart, context.map().center());
 
-	            } else if (datum instanceof osmNote) {
-	                if (context.mode().id === 'drag-note') { return; }
-	                _wasNote = true;
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	                var osm = services.osm;
-	                if (osm) {
-	                    datum = osm.getNote(datum.id);   // marker may contain stale data - get latest
-	                }
+	    context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
+	    timeout(function () {
+	      var tooltip = reveal('button.add-line', helpHtml('intro.lines.add_line'));
+	      tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-lines');
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-line') return;
+	        continueTo(startLine);
+	      });
+	    }, msec + 100);
+
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
+
+	  function startLine() {
+	    if (context.mode().id !== 'add-line') return chapter.restart();
+	    _tulipRoadID = null;
+	    var padding = 70 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(tulipRoadStart, padding, context);
+	    box.height = box.height + 100;
+	    var textId = context.lastPointerType() === 'mouse' ? 'start_line' : 'start_line_tap';
+	    var startLineString = helpHtml('intro.lines.missing_road') + '{br}' + helpHtml('intro.lines.line_draw_info') + helpHtml('intro.lines.' + textId);
+	    reveal(box, startLineString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      padding = 70 * Math.pow(2, context.map().zoom() - 18);
+	      box = pad(tulipRoadStart, padding, context);
+	      box.height = box.height + 100;
+	      reveal(box, startLineString, {
+	        duration: 0
+	      });
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'draw-line') return chapter.restart();
+	      continueTo(drawLine);
+	    });
 
-	                sidebar
-	                    .show(noteEditor.note(datum));
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                selection.selectAll('.sidebar-component')
-	                    .classed('inspector-hover', true);
+	  function drawLine() {
+	    if (context.mode().id !== 'draw-line') return chapter.restart();
+	    _tulipRoadID = context.mode().selectedIDs()[0];
+	    context.map().centerEase(tulipRoadMidpoint, 500);
+	    timeout(function () {
+	      var padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
+	      var box = pad(tulipRoadMidpoint, padding, context);
+	      box.height = box.height * 2;
+	      reveal(box, helpHtml('intro.lines.intersect', {
+	        name: _t('intro.graph.name.flower-street')
+	      }));
+	      context.map().on('move.intro drawn.intro', function () {
+	        padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
+	        box = pad(tulipRoadMidpoint, padding, context);
+	        box.height = box.height * 2;
+	        reveal(box, helpHtml('intro.lines.intersect', {
+	          name: _t('intro.graph.name.flower-street')
+	        }), {
+	          duration: 0
+	        });
+	      });
+	    }, 550); // after easing..
 
-	            } else if (datum instanceof QAItem) {
-	                _wasQaItem = true;
+	    context.history().on('change.intro', function () {
+	      if (isLineConnected()) {
+	        continueTo(continueLine);
+	      }
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-line') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        continueTo(retryIntersect);
+	        return;
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	                var errService = services[datum.service];
-	                if (errService) {
-	                    // marker may contain stale data - get latest
-	                    datum = errService.getError(datum.id);
-	                }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                // Currently only three possible services
-	                var errEditor;
-	                if (datum.service === 'keepRight') {
-	                    errEditor = keepRightEditor;
-	                } else if (datum.service === 'osmose') {
-	                    errEditor = osmoseEditor;
-	                } else {
-	                    errEditor = improveOsmEditor;
-	                }
+	  function isLineConnected() {
+	    var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-	                context.container().selectAll('.qaItem.' + datum.service)
-	                    .classed('hover', function(d) { return d.id === datum.id; });
+	    if (!entity) return false;
+	    var drawNodes = context.graph().childNodes(entity);
+	    return drawNodes.some(function (node) {
+	      return context.graph().parentWays(node).some(function (parent) {
+	        return parent.id === flowerRoadID;
+	      });
+	    });
+	  }
 
-	                sidebar
-	                    .show(errEditor.error(datum));
+	  function retryIntersect() {
+	    select(window).on('pointerdown.intro mousedown.intro', eventCancel, true);
+	    var box = pad(tulipRoadIntersection, 80, context);
+	    reveal(box, helpHtml('intro.lines.retry_intersect', {
+	      name: _t('intro.graph.name.flower-street')
+	    }));
+	    timeout(chapter.restart, 3000);
+	  }
 
-	                selection.selectAll('.sidebar-component')
-	                    .classed('inspector-hover', true);
+	  function continueLine() {
+	    if (context.mode().id !== 'draw-line') return chapter.restart();
 
-	            } else if (!_current && (datum instanceof osmEntity)) {
-	                featureListWrap
-	                    .classed('inspector-hidden', true);
+	    var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-	                inspectorWrap
-	                    .classed('inspector-hidden', false)
-	                    .classed('inspector-hover', true);
+	    if (!entity) return chapter.restart();
+	    context.map().centerEase(tulipRoadIntersection, 500);
+	    var continueLineText = helpHtml('intro.lines.continue_line') + '{br}' + helpHtml('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.lines.finish_road');
+	    reveal('.surface', continueLineText);
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-line') return;else if (mode.id === 'select') return continueTo(chooseCategoryRoad);else return chapter.restart();
+	    });
 
-	                if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
-	                    inspector
-	                        .state('hover')
-	                        .entityIDs([datum.id])
-	                        .newFeature(false);
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                    inspectorWrap
-	                        .call(inspector);
-	                }
+	  function chooseCategoryRoad() {
+	    if (context.mode().id !== 'select') return chapter.restart();
+	    context.on('exit.intro', function () {
+	      return chapter.restart();
+	    });
+	    var button = context.container().select('.preset-category-road_minor .preset-list-button');
+	    if (button.empty()) return chapter.restart(); // disallow scrolling
+
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      reveal(button.node(), helpHtml('intro.lines.choose_category_road', {
+	        category: roadCategory.name()
+	      }));
+	      button.on('click.intro', function () {
+	        continueTo(choosePresetResidential);
+	      });
+	    }, 400); // after editor pane visible
 
-	            } else if (!_current) {
-	                featureListWrap
-	                    .classed('inspector-hidden', false);
-	                inspectorWrap
-	                    .classed('inspector-hidden', true);
-	                inspector
-	                    .state('hide');
-
-	            } else if (_wasData || _wasNote || _wasQaItem) {
-	                _wasNote = false;
-	                _wasData = false;
-	                _wasQaItem = false;
-	                context.container().selectAll('.note').classed('hover', false);
-	                context.container().selectAll('.qaItem').classed('hover', false);
-	                sidebar.hide();
-	            }
-	        }
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        sidebar.hover = throttle(hover, 200);
+	  function choosePresetResidential() {
+	    if (context.mode().id !== 'select') return chapter.restart();
+	    context.on('exit.intro', function () {
+	      return chapter.restart();
+	    });
+	    var subgrid = context.container().select('.preset-category-road_minor .subgrid');
+	    if (subgrid.empty()) return chapter.restart();
+	    subgrid.selectAll(':not(.preset-highway-residential) .preset-list-button').on('click.intro', function () {
+	      continueTo(retryPresetResidential);
+	    });
+	    subgrid.selectAll('.preset-highway-residential .preset-list-button').on('click.intro', function () {
+	      continueTo(nameRoad);
+	    });
+	    timeout(function () {
+	      reveal(subgrid.node(), helpHtml('intro.lines.choose_preset_residential', {
+	        preset: residentialPreset.name()
+	      }), {
+	        tooltipBox: '.preset-highway-residential .preset-list-button',
+	        duration: 300
+	      });
+	    }, 300);
 
+	    function continueTo(nextStep) {
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  } // selected wrong road type
 
-	        sidebar.intersects = function(extent) {
-	            var rect = selection.node().getBoundingClientRect();
-	            return extent.intersects([
-	                context.projection.invert([0, rect.height]),
-	                context.projection.invert([rect.width, 0])
-	            ]);
-	        };
 
+	  function retryPresetResidential() {
+	    if (context.mode().id !== 'select') return chapter.restart();
+	    context.on('exit.intro', function () {
+	      return chapter.restart();
+	    }); // disallow scrolling
 
-	        sidebar.select = function(ids, newFeature) {
-	            sidebar.hide();
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      var button = context.container().select('.entity-editor-pane .preset-list-button');
+	      reveal(button.node(), helpHtml('intro.lines.retry_preset_residential', {
+	        preset: residentialPreset.name()
+	      }));
+	      button.on('click.intro', function () {
+	        continueTo(chooseCategoryRoad);
+	      });
+	    }, 500);
 
-	            if (ids && ids.length) {
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                var entity = ids.length === 1 && context.entity(ids[0]);
-	                if (entity && newFeature && selection.classed('collapsed')) {
-	                    // uncollapse the sidebar
-	                    var extent = entity.extent(context.graph());
-	                    sidebar.expand(sidebar.intersects(extent));
-	                }
+	  function nameRoad() {
+	    context.on('exit.intro', function () {
+	      continueTo(didNameRoad);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.lines.name_road', {
+	        button: icon('#iD-icon-close', 'inline')
+	      }), {
+	        tooltipClass: 'intro-lines-name_road'
+	      });
+	    }, 500);
 
-	                featureListWrap
-	                    .classed('inspector-hidden', true);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                inspectorWrap
-	                    .classed('inspector-hidden', false)
-	                    .classed('inspector-hover', false);
+	  function didNameRoad() {
+	    context.history().checkpoint('doneAddLine');
+	    timeout(function () {
+	      reveal('.surface', helpHtml('intro.lines.did_name_road'), {
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: function buttonCallback() {
+	          continueTo(updateLine);
+	        }
+	      });
+	    }, 500);
 
-	                if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), ids) || inspector.state() !== 'select') {
-	                    inspector
-	                        .state('select')
-	                        .entityIDs(ids)
-	                        .newFeature(newFeature);
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
-	                    inspectorWrap
-	                        .call(inspector);
-	                }
+	  function updateLine() {
+	    context.history().reset('doneAddLine');
 
-	            } else {
-	                inspector
-	                    .state('hide');
-	            }
-	        };
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return chapter.restart();
+	    }
 
+	    var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
 
-	        sidebar.showPresetList = function() {
-	            inspector.showList();
-	        };
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
+	    context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
+	    timeout(function () {
+	      var padding = 250 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragMidpoint, padding, context);
 
-	        sidebar.show = function(component, element) {
-	            featureListWrap
-	                .classed('inspector-hidden', true);
-	            inspectorWrap
-	                .classed('inspector-hidden', true);
+	      var advance = function advance() {
+	        continueTo(addNode);
+	      };
 
-	            if (_current) { _current.remove(); }
-	            _current = selection
-	                .append('div')
-	                .attr('class', 'sidebar-component')
-	                .call(component, element);
-	        };
+	      reveal(box, helpHtml('intro.lines.update_line'), {
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: advance
+	      });
+	      context.map().on('move.intro drawn.intro', function () {
+	        var padding = 250 * Math.pow(2, context.map().zoom() - 19);
+	        var box = pad(woodRoadDragMidpoint, padding, context);
+	        reveal(box, helpHtml('intro.lines.update_line'), {
+	          duration: 0,
+	          buttonText: _t.html('intro.ok'),
+	          buttonCallback: advance
+	        });
+	      });
+	    }, msec + 100);
 
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        sidebar.hide = function() {
-	            featureListWrap
-	                .classed('inspector-hidden', false);
-	            inspectorWrap
-	                .classed('inspector-hidden', true);
+	  function addNode() {
+	    context.history().reset('doneAddLine');
 
-	            if (_current) { _current.remove(); }
-	            _current = null;
-	        };
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return chapter.restart();
+	    }
 
+	    var padding = 40 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadAddNode, padding, context);
+	    var addNodeString = helpHtml('intro.lines.add_node' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
+	    reveal(box, addNodeString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      var padding = 40 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadAddNode, padding, context);
+	      reveal(box, addNodeString, {
+	        duration: 0
+	      });
+	    });
+	    context.history().on('change.intro', function (changed) {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	        sidebar.expand = function(moveMap) {
-	            if (selection.classed('collapsed')) {
-	                sidebar.toggle(moveMap);
-	            }
-	        };
+	      if (changed.created().length === 1) {
+	        timeout(function () {
+	          continueTo(startDragEndpoint);
+	        }, 500);
+	      }
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') {
+	        continueTo(updateLine);
+	      }
+	    });
 
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        sidebar.collapse = function(moveMap) {
-	            if (!selection.classed('collapsed')) {
-	                sidebar.toggle(moveMap);
-	            }
-	        };
+	  function startDragEndpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
+	    var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragEndpoint, padding, context);
+	    var startDragString = helpHtml('intro.lines.start_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch')) + helpHtml('intro.lines.drag_to_intersection');
+	    reveal(box, startDragString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	        sidebar.toggle = function(moveMap) {
-	            var e = event;
-	            if (e && e.sourceEvent) {
-	                e.sourceEvent.preventDefault();
-	            } else if (e) {
-	                e.preventDefault();
-	            }
+	      var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragEndpoint, padding, context);
+	      reveal(box, startDragString, {
+	        duration: 0
+	      });
+	      var entity = context.entity(woodRoadEndID);
 
-	            // Don't allow sidebar to toggle when the user is in the walkthrough.
-	            if (context.inIntro()) { return; }
+	      if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
+	        continueTo(finishDragEndpoint);
+	      }
+	    });
 
-	            var isCollapsed = selection.classed('collapsed');
-	            var isCollapsing = !isCollapsed;
-	            var isRTL = (_mainLocalizer.textDirection() === 'rtl');
-	            var scaleX = isRTL ? 0 : 1;
-	            var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            sidebarWidth = selection.node().getBoundingClientRect().width;
+	  function finishDragEndpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	            // switch from % to px
-	            selection.style('width', sidebarWidth + 'px');
+	    var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragEndpoint, padding, context);
+	    var finishDragString = helpHtml('intro.lines.spot_looks_good') + helpHtml('intro.lines.finish_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
+	    reveal(box, finishDragString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	            var startMargin, endMargin, lastMargin;
-	            if (isCollapsing) {
-	                startMargin = lastMargin = 0;
-	                endMargin = -sidebarWidth;
-	            } else {
-	                startMargin = lastMargin = -sidebarWidth;
-	                endMargin = 0;
-	            }
+	      var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragEndpoint, padding, context);
+	      reveal(box, finishDragString, {
+	        duration: 0
+	      });
+	      var entity = context.entity(woodRoadEndID);
 
-	            selection.transition()
-	                .style(xMarginProperty, endMargin + 'px')
-	                .tween('panner', function() {
-	                    var i = d3_interpolateNumber(startMargin, endMargin);
-	                    return function(t) {
-	                        var dx = lastMargin - Math.round(i(t));
-	                        lastMargin = lastMargin - dx;
-	                        context.ui().onResize(moveMap ? undefined : [dx * scaleX, 0]);
-	                    };
-	                })
-	                .on('end', function() {
-	                    selection.classed('collapsed', isCollapsing);
-
-	                    // switch back from px to %
-	                    if (!isCollapsing) {
-	                        var containerWidth = container.node().getBoundingClientRect().width;
-	                        var widthPct = (sidebarWidth / containerWidth) * 100;
-	                        selection
-	                            .style(xMarginProperty, null)
-	                            .style('width', widthPct + '%');
-	                    }
-	                });
-	        };
+	      if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
+	        continueTo(startDragEndpoint);
+	      }
+	    });
+	    context.on('enter.intro', function () {
+	      continueTo(startDragMidpoint);
+	    });
 
-	        // toggle the sidebar collapse when double-clicking the resizer
-	        resizer.on('dblclick', sidebar.toggle);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        // ensure hover sidebar is closed when zooming out beyond editable zoom
-	        context.map().on('crossEditableZoom.sidebar', function(within) {
-	            if (!within && !selection.select('.inspector-hover').empty()) {
-	                hover([]);
-	            }
-	        });
+	  function startDragMidpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
 	    }
 
-	    sidebar.showPresetList = function() {};
-	    sidebar.hover = function() {};
-	    sidebar.hover.cancel = function() {};
-	    sidebar.intersects = function() {};
-	    sidebar.select = function() {};
-	    sidebar.show = function() {};
-	    sidebar.hide = function() {};
-	    sidebar.expand = function() {};
-	    sidebar.collapse = function() {};
-	    sidebar.toggle = function() {};
+	    if (context.selectedIDs().indexOf(woodRoadID) === -1) {
+	      context.enter(modeSelect(context, [woodRoadID]));
+	    }
 
-	    return sidebar;
-	}
+	    var padding = 80 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragMidpoint, padding, context);
+	    reveal(box, helpHtml('intro.lines.start_drag_midpoint'));
+	    context.map().on('move.intro drawn.intro', function () {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	function uiSourceSwitch(context) {
-	    var keys;
+	      var padding = 80 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragMidpoint, padding, context);
+	      reveal(box, helpHtml('intro.lines.start_drag_midpoint'), {
+	        duration: 0
+	      });
+	    });
+	    context.history().on('change.intro', function (changed) {
+	      if (changed.created().length === 1) {
+	        continueTo(continueDragMidpoint);
+	      }
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') {
+	        // keep Wood Road selected so midpoint triangles are drawn..
+	        context.enter(modeSelect(context, [woodRoadID]));
+	      }
+	    });
 
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    function click() {
-	        event.preventDefault();
+	  function continueDragMidpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	    var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	    var box = pad(woodRoadDragEndpoint, padding, context);
+	    box.height += 400;
 
-	        if (context.inIntro()) { return; }
+	    var advance = function advance() {
+	      context.history().checkpoint('doneUpdateLine');
+	      continueTo(deleteLines);
+	    };
 
-	        if (context.history().hasChanges() &&
-	            !window.confirm(_t('source_switch.lose_changes'))) { return; }
+	    reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: advance
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	        return continueTo(updateLine);
+	      }
 
-	        var isLive = select(this)
-	            .classed('live');
+	      var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragEndpoint, padding, context);
+	      box.height += 400;
+	      reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: advance
+	      });
+	    });
 
-	        isLive = !isLive;
-	        context.enter(modeBrowse(context));
-	        context.history().clearSaved();          // remove saved history
-	        context.flush();                         // remove stored data
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        select(this)
-	            .text(isLive ? _t('source_switch.live') : _t('source_switch.dev'))
-	            .classed('live', isLive)
-	            .classed('chip', isLive);
+	  function deleteLines() {
+	    context.history().reset('doneUpdateLine');
+	    context.enter(modeBrowse(context));
 
-	        osm.switch(isLive ? keys[0] : keys[1]);  // switch connection (warning: dispatches 'change' event)
+	    if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return chapter.restart();
 	    }
 
-	    var sourceSwitch = function(selection) {
-	        selection
-	            .append('a')
-	            .attr('href', '#')
-	            .text(_t('source_switch.live'))
-	            .attr('class', 'live chip')
-	            .on('click', click);
-	    };
+	    var msec = transitionTime(deleteLinesLoc, context.map().center());
 
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	    sourceSwitch.keys = function(_) {
-	        if (!arguments.length) { return keys; }
-	        keys = _;
-	        return sourceSwitch;
-	    };
+	    context.map().centerZoomEase(deleteLinesLoc, 18, msec);
+	    timeout(function () {
+	      var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	      var box = pad(deleteLinesLoc, padding, context);
+	      box.top -= 200;
+	      box.height += 400;
 
+	      var advance = function advance() {
+	        continueTo(rightClickIntersection);
+	      };
 
-	    return sourceSwitch;
-	}
+	      reveal(box, helpHtml('intro.lines.delete_lines', {
+	        street: _t('intro.graph.name.12th-avenue')
+	      }), {
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: advance
+	      });
+	      context.map().on('move.intro drawn.intro', function () {
+	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	        var box = pad(deleteLinesLoc, padding, context);
+	        box.top -= 200;
+	        box.height += 400;
+	        reveal(box, helpHtml('intro.lines.delete_lines', {
+	          street: _t('intro.graph.name.12th-avenue')
+	        }), {
+	          duration: 0,
+	          buttonText: _t.html('intro.ok'),
+	          buttonCallback: advance
+	        });
+	      });
+	      context.history().on('change.intro', function () {
+	        timeout(function () {
+	          continueTo(deleteLines);
+	        }, 500); // after any transition (e.g. if user deleted intersection)
+	      });
+	    }, msec + 100);
 
-	function uiSpinner(context) {
-	    var osm = context.connection();
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function rightClickIntersection() {
+	    context.history().reset('doneUpdateLine');
+	    context.enter(modeBrowse(context));
+	    context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
+	    var rightClickString = helpHtml('intro.lines.split_street', {
+	      street1: _t('intro.graph.name.11th-avenue'),
+	      street2: _t('intro.graph.name.washington-street')
+	    }) + helpHtml('intro.lines.' + (context.lastPointerType() === 'mouse' ? 'rightclick_intersection' : 'edit_menu_intersection_touch'));
+	    timeout(function () {
+	      var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	      var box = pad(eleventhAvenueEnd, padding, context);
+	      reveal(box, rightClickString);
+	      context.map().on('move.intro drawn.intro', function () {
+	        var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	        var box = pad(eleventhAvenueEnd, padding, context);
+	        reveal(box, rightClickString, {
+	          duration: 0
+	        });
+	      });
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'select') return;
+	        var ids = context.selectedIDs();
+	        if (ids.length !== 1 || ids[0] !== eleventhAvenueEndID) return;
+	        timeout(function () {
+	          var node = selectMenuItem(context, 'split').node();
+	          if (!node) return;
+	          continueTo(splitIntersection);
+	        }, 50); // after menu visible
+	      });
+	      context.history().on('change.intro', function () {
+	        timeout(function () {
+	          continueTo(deleteLines);
+	        }, 300); // after any transition (e.g. if user deleted intersection)
+	      });
+	    }, 600);
 
-	    return function(selection) {
-	        var img = selection
-	            .append('img')
-	            .attr('src', context.imagePath('loader-black.gif'))
-	            .style('opacity', 0);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        if (osm) {
-	            osm
-	                .on('loading.spinner', function() {
-	                    img.transition()
-	                        .style('opacity', 1);
-	                })
-	                .on('loaded.spinner', function() {
-	                    img.transition()
-	                        .style('opacity', 0);
-	                });
-	        }
-	    };
-	}
+	  function splitIntersection() {
+	    if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(deleteLines);
+	    }
 
-	function uiSplash(context) {
-	  return function (selection) {
-	    // Exception - if there are restorable changes, skip this splash screen.
-	    // This is because we currently only support one `uiModal` at a time
-	    //  and we need to show them `uiRestore`` instead of this one.
-	    if (context.history().hasRestorableChanges()) { return; }
+	    var node = selectMenuItem(context, 'split').node();
 
-	    // If user has not seen this version of the privacy policy, show the splash again.
-	    var updateMessage = '';
-	    var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
-	    var showSplash = !corePreferences('sawSplash');
-	    if (sawPrivacyVersion !== context.privacyVersion) {
-	      updateMessage = _t('splash.privacy_update');
-	      showSplash = true;
+	    if (!node) {
+	      return continueTo(rightClickIntersection);
 	    }
 
-	    if (!showSplash) { return; }
-
-	    corePreferences('sawSplash', true);
-	    corePreferences('sawPrivacyVersion', context.privacyVersion);
+	    var wasChanged = false;
+	    _washingtonSegmentID = null;
+	    reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
+	      street: _t('intro.graph.name.washington-street')
+	    }), {
+	      padding: 50
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      var node = selectMenuItem(context, 'split').node();
 
-	    // fetch intro graph data now, while user is looking at the splash screen
-	    _mainFileFetcher.get('intro_graph');
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickIntersection);
+	      }
 
-	    var modalSelection = uiModal(selection);
+	      reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
+	        street: _t('intro.graph.name.washington-street')
+	      }), {
+	        duration: 0,
+	        padding: 50
+	      });
+	    });
+	    context.history().on('change.intro', function (changed) {
+	      wasChanged = true;
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.split.annotation.line')) {
+	          _washingtonSegmentID = changed.created()[0].id;
+	          continueTo(didSplit);
+	        } else {
+	          _washingtonSegmentID = null;
+	          continueTo(retrySplit);
+	        }
+	      }, 300); // after any transition (e.g. if user deleted intersection)
+	    });
 
-	    modalSelection.select('.modal')
-	      .attr('class', 'modal-splash modal');
-
-	    var introModal = modalSelection.select('.content')
-	      .append('div')
-	      .attr('class', 'fillL');
-
-	    introModal
-	      .append('div')
-	      .attr('class','modal-section')
-	      .append('h3')
-	      .text(_t('splash.welcome'));
-
-	    var modalSection = introModal
-	      .append('div')
-	      .attr('class','modal-section');
-
-	    modalSection
-	      .append('p')
-	      .html(_t('splash.text', {
-	        version: context.version,
-	        website: '<a target="_blank" href="http://ideditor.blog/">ideditor.blog</a>',
-	        github: '<a target="_blank" href="https://github.com/openstreetmap/iD">github.com</a>'
-	      }));
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    modalSection
-	      .append('p')
-	      .html(_t('splash.privacy', {
-	        updateMessage: updateMessage,
-	        privacyLink: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' +
-	          _t('splash.privacy_policy') + '</a>'
-	      }));
+	  function retrySplit() {
+	    context.enter(modeBrowse(context));
+	    context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
 
-	    var buttonWrap = introModal
-	      .append('div')
-	      .attr('class', 'modal-actions');
+	    var advance = function advance() {
+	      continueTo(rightClickIntersection);
+	    };
 
-	    var walkthrough = buttonWrap
-	      .append('button')
-	      .attr('class', 'walkthrough')
-	      .on('click', function () {
-	        context.container().call(uiIntro(context));
-	        modalSelection.close();
+	    var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(eleventhAvenueEnd, padding, context);
+	    reveal(box, helpHtml('intro.lines.retry_split'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: advance
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	      var box = pad(eleventhAvenueEnd, padding, context);
+	      reveal(box, helpHtml('intro.lines.retry_split'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: advance
 	      });
+	    });
 
-	    walkthrough
-	      .append('svg')
-	      .attr('class', 'logo logo-walkthrough')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-walkthrough');
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    walkthrough
-	      .append('div')
-	      .text(_t('splash.walkthrough'));
+	  function didSplit() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	    var startEditing = buttonWrap
-	      .append('button')
-	      .attr('class', 'start-editing')
-	      .on('click', modalSelection.close);
+	    var ids = context.selectedIDs();
+	    var string = 'intro.lines.did_split_' + (ids.length > 1 ? 'multi' : 'single');
+	    var street = _t('intro.graph.name.washington-street');
+	    var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(twelfthAvenue, padding, context);
+	    box.width = box.width / 2;
+	    reveal(box, helpHtml(string, {
+	      street1: street,
+	      street2: street
+	    }), {
+	      duration: 500
+	    });
+	    timeout(function () {
+	      context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	      context.map().on('move.intro drawn.intro', function () {
+	        var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	        var box = pad(twelfthAvenue, padding, context);
+	        box.width = box.width / 2;
+	        reveal(box, helpHtml(string, {
+	          street1: street,
+	          street2: street
+	        }), {
+	          duration: 0
+	        });
+	      });
+	    }, 600); // after initial reveal and curtain cut
 
-	    startEditing
-	      .append('svg')
-	      .attr('class', 'logo logo-features')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-features');
+	    context.on('enter.intro', function () {
+	      var ids = context.selectedIDs();
 
-	    startEditing
-	      .append('div')
-	      .text(_t('splash.start'));
+	      if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
+	        continueTo(multiSelect);
+	      }
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	        return continueTo(rightClickIntersection);
+	      }
+	    });
 
-	    modalSelection.select('button.close')
-	      .attr('class','hide');
-	  };
-	}
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	function uiStatus(context) {
-	    var osm = context.connection();
+	  function multiSelect() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
 
+	    var ids = context.selectedIDs();
+	    var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
+	    var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
 
-	    return function(selection) {
-	        if (!osm) { return; }
+	    if (hasWashington && hasTwelfth) {
+	      return continueTo(multiRightClick);
+	    } else if (!hasWashington && !hasTwelfth) {
+	      return continueTo(didSplit);
+	    }
 
-	        function update(err, apiStatus) {
-	            selection.html('');
+	    context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	    timeout(function () {
+	      var selected, other, padding, box;
 
-	            if (err) {
-	                if (apiStatus === 'connectionSwitched') {
-	                    // if the connection was just switched, we can't rely on
-	                    // the status (we're getting the status of the previous api)
-	                    return;
+	      if (hasWashington) {
+	        selected = _t('intro.graph.name.washington-street');
+	        other = _t('intro.graph.name.12th-avenue');
+	        padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	        box = pad(twelfthAvenueEnd, padding, context);
+	        box.width *= 3;
+	      } else {
+	        selected = _t('intro.graph.name.12th-avenue');
+	        other = _t('intro.graph.name.washington-street');
+	        padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	        box = pad(twelfthAvenue, padding, context);
+	        box.width /= 2;
+	      }
 
-	                } else if (apiStatus === 'rateLimited') {
-	                    selection
-	                        .text(_t('osm_api_status.message.rateLimit'))
-	                        .append('a')
-	                        .attr('class', 'api-status-login')
-	                        .attr('target', '_blank')
-	                        .call(svgIcon('#iD-icon-out-link', 'inline'))
-	                        .append('span')
-	                        .text(_t('login'))
-	                        .on('click.login', function() {
-	                            event.preventDefault();
-	                            osm.authenticate();
-	                        });
-	                } else {
-
-	                    // don't allow retrying too rapidly
-	                    var throttledRetry = throttle(function() {
-	                        // try loading the visible tiles
-	                        context.loadTiles(context.projection);
-	                        // manually reload the status too in case all visible tiles were already loaded
-	                        osm.reloadApiStatus();
-	                    }, 2000);
-
-	                    // eslint-disable-next-line no-warning-comments
-	                    // TODO: nice messages for different error types
-	                    selection
-	                        .text(_t('osm_api_status.message.error') + ' ')
-	                        .append('a')
-	                        // let the user manually retry their connection directly
-	                        .text(_t('osm_api_status.retry'))
-	                        .on('click.retry', function() {
-	                            event.preventDefault();
-	                            throttledRetry();
-	                        });
-	                }
+	      reveal(box, helpHtml('intro.lines.multi_select', {
+	        selected: selected,
+	        other1: other
+	      }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
+	        selected: selected,
+	        other2: other
+	      }));
+	      context.map().on('move.intro drawn.intro', function () {
+	        if (hasWashington) {
+	          selected = _t('intro.graph.name.washington-street');
+	          other = _t('intro.graph.name.12th-avenue');
+	          padding = 60 * Math.pow(2, context.map().zoom() - 18);
+	          box = pad(twelfthAvenueEnd, padding, context);
+	          box.width *= 3;
+	        } else {
+	          selected = _t('intro.graph.name.12th-avenue');
+	          other = _t('intro.graph.name.washington-street');
+	          padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	          box = pad(twelfthAvenue, padding, context);
+	          box.width /= 2;
+	        }
+
+	        reveal(box, helpHtml('intro.lines.multi_select', {
+	          selected: selected,
+	          other1: other
+	        }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
+	          selected: selected,
+	          other2: other
+	        }), {
+	          duration: 0
+	        });
+	      });
+	      context.on('enter.intro', function () {
+	        continueTo(multiSelect);
+	      });
+	      context.history().on('change.intro', function () {
+	        if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	          return continueTo(rightClickIntersection);
+	        }
+	      });
+	    }, 600);
 
-	            } else if (apiStatus === 'readonly') {
-	                selection.text(_t('osm_api_status.message.readonly'));
-	            } else if (apiStatus === 'offline') {
-	                selection.text(_t('osm_api_status.message.offline'));
-	            }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
+
+	  function multiRightClick() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
+
+	    var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(twelfthAvenue, padding, context);
+	    var rightClickString = helpHtml('intro.lines.multi_select_success') + helpHtml('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
+	    reveal(box, rightClickString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	      var box = pad(twelfthAvenue, padding, context);
+	      reveal(box, rightClickString, {
+	        duration: 0
+	      });
+	    });
+	    context.ui().editMenu().on('toggled.intro', function (open) {
+	      if (!open) return;
+	      timeout(function () {
+	        var ids = context.selectedIDs();
 
-	            selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
+	        if (ids.length === 2 && ids.indexOf(twelfthAvenueID) !== -1 && ids.indexOf(_washingtonSegmentID) !== -1) {
+	          var node = selectMenuItem(context, 'delete').node();
+	          if (!node) return;
+	          continueTo(multiDelete);
+	        } else if (ids.length === 1 && ids.indexOf(_washingtonSegmentID) !== -1) {
+	          return continueTo(multiSelect);
+	        } else {
+	          return continueTo(didSplit);
 	        }
+	      }, 300); // after edit menu visible
+	    });
+	    context.history().on('change.intro', function () {
+	      if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	        return continueTo(rightClickIntersection);
+	      }
+	    });
 
-	        osm.on('apiStatusChange.uiStatus', update);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.ui().editMenu().on('toggled.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        // reload the status periodically regardless of other factors
-	        window.setInterval(function() {
-	            osm.reloadApiStatus();
-	        }, 90000);
+	  function multiDelete() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	        // load the initial status in case no OSM data was loaded yet
-	        osm.reloadApiStatus();
-	    };
-	}
+	    var node = selectMenuItem(context, 'delete').node();
+	    if (!node) return continueTo(multiRightClick);
+	    reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+	      padding: 50
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+	        duration: 0,
+	        padding: 50
+	      });
+	    });
+	    context.on('exit.intro', function () {
+	      if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
+	        return continueTo(multiSelect); // left select mode but roads still exist
+	      }
+	    });
+	    context.history().on('change.intro', function () {
+	      if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
+	        continueTo(retryDelete); // changed something but roads still exist
+	      } else {
+	        continueTo(play);
+	      }
+	    });
 
-	function modeDrawArea(context, wayID, startGraph, button) {
-	    var mode = {
-	        button: button,
-	        id: 'draw-area'
-	    };
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    var behavior = behaviorDrawWay(context, wayID, mode, startGraph)
-	        .on('rejectedSelfIntersection.modeDrawArea', function() {
-	            context.ui().flash
-	                .text(_t('self_intersection.error.areas'))();
-	        });
+	  function retryDelete() {
+	    context.enter(modeBrowse(context));
+	    var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+	    var box = pad(twelfthAvenue, padding, context);
+	    reveal(box, helpHtml('intro.lines.retry_delete'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(multiSelect);
+	      }
+	    });
 
-	    mode.wayID = wayID;
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	  function play() {
+	    dispatch$1.call('done');
+	    reveal('.ideditor', helpHtml('intro.lines.play', {
+	      next: _t('intro.buildings.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-building',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	  chapter.enter = function () {
+	    addLine();
+	  };
 
-	    mode.selectedIDs = function() {
-	        return [wayID];
-	    };
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    select(window).on('pointerdown.intro mousedown.intro', null, true);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', null);
+	    context.container().select('.preset-list-button').on('click.intro', null);
+	  };
 
-	    mode.activeID = function() {
-	        return (behavior && behavior.activeID()) || [];
-	    };
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	    return mode;
+	  return utilRebind(chapter, dispatch$1, 'on');
 	}
 
-	function modeAddArea(context, mode) {
-	    mode.id = 'add-area';
+	function uiIntroBuilding(context, reveal) {
+	  var dispatch$1 = dispatch('done');
+	  var house = [-85.62815, 41.95638];
+	  var tank = [-85.62732, 41.95347];
+	  var buildingCatetory = _mainPresetIndex.item('category-building');
+	  var housePreset = _mainPresetIndex.item('building/house');
+	  var tankPreset = _mainPresetIndex.item('man_made/storage_tank');
+	  var timeouts = [];
+	  var _houseID = null;
+	  var _tankID = null;
+	  var chapter = {
+	    title: 'intro.buildings.title'
+	  };
 
-	    var behavior = behaviorAddWay(context)
-	        .on('start', start)
-	        .on('startFromWay', startFromWay)
-	        .on('startFromNode', startFromNode);
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	    var defaultTags = { area: 'yes' };
-	    if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'area'); }
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
+	  function revealHouse(center, text, options) {
+	    var padding = 160 * Math.pow(2, context.map().zoom() - 20);
+	    var box = pad(center, padding, context);
+	    reveal(box, text, options);
+	  }
 
-	    function actionClose(wayId) {
-	        return function (graph) {
-	            return graph.replace(graph.entity(wayId).close());
-	        };
-	    }
+	  function revealTank(center, text, options) {
+	    var padding = 190 * Math.pow(2, context.map().zoom() - 19.5);
+	    var box = pad(center, padding, context);
+	    reveal(box, text, options);
+	  }
 
+	  function addHouse() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    _houseID = null;
+	    var msec = transitionTime(house, context.map().center());
 
-	    function start(loc) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionClose(way.id)
-	        );
+	    context.map().centerZoomEase(house, 19, msec);
+	    timeout(function () {
+	      var tooltip = reveal('button.add-area', helpHtml('intro.buildings.add_building'));
+	      tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-buildings');
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-area') return;
+	        continueTo(startHouse);
+	      });
+	    }, msec + 100);
 
-	        context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function startHouse() {
+	    if (context.mode().id !== 'add-area') {
+	      return continueTo(addHouse);
+	    }
 
-	    function startFromWay(loc, edge) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
-
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionClose(way.id),
-	            actionAddMidpoint({ loc: loc, edge: edge }, node)
-	        );
+	    _houseID = null;
+	    context.map().zoomEase(20, 500);
+	    timeout(function () {
+	      var startString = helpHtml('intro.buildings.start_building') + helpHtml('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
+	      revealHouse(house, startString);
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealHouse(house, startString, {
+	          duration: 0
+	        });
+	      });
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'draw-area') return chapter.restart();
+	        continueTo(continueHouse);
+	      });
+	    }, 550); // after easing
 
-	        context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function continueHouse() {
+	    if (context.mode().id !== 'draw-area') {
+	      return continueTo(addHouse);
+	    }
 
-	    function startFromNode(node) {
-	        var startGraph = context.graph();
-	        var way = osmWay({ tags: defaultTags });
+	    _houseID = null;
+	    var continueString = helpHtml('intro.buildings.continue_building') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_building');
+	    revealHouse(house, continueString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      revealHouse(house, continueString, {
+	        duration: 0
+	      });
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-area') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        var graph = context.graph();
+	        var way = context.entity(context.selectedIDs()[0]);
+	        var nodes = graph.childNodes(way);
+	        var points = utilArrayUniq(nodes).map(function (n) {
+	          return context.projection(n.loc);
+	        });
 
-	        context.perform(
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionClose(way.id)
-	        );
+	        if (isMostlySquare(points)) {
+	          _houseID = way.id;
+	          return continueTo(chooseCategoryBuilding);
+	        } else {
+	          return continueTo(retryHouse);
+	        }
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	        context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
-
-	    mode.enter = function() {
-	        context.install(behavior);
+	  function retryHouse() {
+	    var onClick = function onClick() {
+	      continueTo(addHouse);
 	    };
 
+	    revealHouse(house, helpHtml('intro.buildings.retry_building'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: onClick
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      revealHouse(house, helpHtml('intro.buildings.retry_building'), {
+	        duration: 0,
+	        buttonText: _t.html('intro.ok'),
+	        buttonCallback: onClick
+	      });
+	    });
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function chooseCategoryBuilding() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
+	    }
 
-	    return mode;
-	}
+	    var ids = context.selectedIDs();
 
-	function modeAddLine(context, mode) {
-	    mode.id = 'add-line';
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    } // disallow scrolling
 
-	    var behavior = behaviorAddWay(context)
-	        .on('start', start)
-	        .on('startFromWay', startFromWay)
-	        .on('startFromNode', startFromNode);
 
-	    var defaultTags = {};
-	    if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'line'); }
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      var button = context.container().select('.preset-category-building .preset-list-button');
+	      reveal(button.node(), helpHtml('intro.buildings.choose_category_building', {
+	        category: buildingCatetory.name()
+	      }));
+	      button.on('click.intro', function () {
+	        button.on('click.intro', null);
+	        continueTo(choosePresetHouse);
+	      });
+	    }, 400); // after preset list pane visible..
 
+	    context.on('enter.intro', function (mode) {
+	      if (!_houseID || !context.hasEntity(_houseID)) {
+	        return continueTo(addHouse);
+	      }
 
-	    function start(loc) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
+	      var ids = context.selectedIDs();
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id)
-	        );
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	        return continueTo(chooseCategoryBuilding);
+	      }
+	    });
 
-	        context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
-
-	    function startFromWay(loc, edge) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
-
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionAddMidpoint({ loc: loc, edge: edge }, node)
-	        );
-
-	        context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	  function choosePresetHouse() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
 	    }
 
+	    var ids = context.selectedIDs();
 
-	    function startFromNode(node) {
-	        var startGraph = context.graph();
-	        var way = osmWay({ tags: defaultTags });
-
-	        context.perform(
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id)
-	        );
-
-	        context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
-	    }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    } // disallow scrolling
 
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      var button = context.container().select('.preset-building-house .preset-list-button');
+	      reveal(button.node(), helpHtml('intro.buildings.choose_preset_house', {
+	        preset: housePreset.name()
+	      }), {
+	        duration: 300
+	      });
+	      button.on('click.intro', function () {
+	        button.on('click.intro', null);
+	        continueTo(closeEditorHouse);
+	      });
+	    }, 400); // after preset list pane visible..
 
+	    context.on('enter.intro', function (mode) {
+	      if (!_houseID || !context.hasEntity(_houseID)) {
+	        return continueTo(addHouse);
+	      }
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	      var ids = context.selectedIDs();
 
-	    return mode;
-	}
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	        return continueTo(chooseCategoryBuilding);
+	      }
+	    });
 
-	function modeAddPoint(context, mode) {
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    mode.id = 'add-point';
+	  function closeEditorHouse() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
+	    }
 
-	    var behavior = behaviorDraw(context)
-	        .on('click', add)
-	        .on('clickWay', addWay)
-	        .on('clickNode', addNode)
-	        .on('cancel', cancel)
-	        .on('finish', cancel);
+	    var ids = context.selectedIDs();
 
-	    var defaultTags = {};
-	    if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'point'); }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    }
 
+	    context.history().checkpoint('hasHouse');
+	    context.on('exit.intro', function () {
+	      continueTo(rightClickHouse);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
+	        button: icon('#iD-icon-close', 'inline')
+	      }));
+	    }, 500);
 
-	    function add(loc) {
-	        var node = osmNode({ loc: loc, tags: defaultTags });
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.perform(
-	            actionAddEntity(node),
-	            _t('operations.add.annotation.point')
-	        );
+	  function rightClickHouse() {
+	    if (!_houseID) return chapter.restart();
+	    context.enter(modeBrowse(context));
+	    context.history().reset('hasHouse');
+	    var zoom = context.map().zoom();
 
-	        enterSelectMode(node);
+	    if (zoom < 20) {
+	      zoom = 20;
 	    }
 
+	    context.map().centerZoomEase(house, zoom, 500);
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') return;
+	      var ids = context.selectedIDs();
+	      if (ids.length !== 1 || ids[0] !== _houseID) return;
+	      timeout(function () {
+	        var node = selectMenuItem(context, 'orthogonalize').node();
+	        if (!node) return;
+	        continueTo(clickSquare);
+	      }, 50); // after menu visible
+	    });
+	    context.map().on('move.intro drawn.intro', function () {
+	      var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
+	      revealHouse(house, rightclickString, {
+	        duration: 0
+	      });
+	    });
+	    context.history().on('change.intro', function () {
+	      continueTo(rightClickHouse);
+	    });
 
-	    function addWay(loc, edge) {
-	        var node = osmNode({ tags: defaultTags });
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context.perform(
-	            actionAddMidpoint({loc: loc, edge: edge}, node),
-	            _t('operations.add.annotation.vertex')
-	        );
+	  function clickSquare() {
+	    if (!_houseID) return chapter.restart();
+	    var entity = context.hasEntity(_houseID);
+	    if (!entity) return continueTo(rightClickHouse);
+	    var node = selectMenuItem(context, 'orthogonalize').node();
 
-	        enterSelectMode(node);
+	    if (!node) {
+	      return continueTo(rightClickHouse);
 	    }
 
-	    function enterSelectMode(node) {
-	        context.enter(
-	            modeSelect(context, [node.id]).newFeature(true)
-	        );
-	    }
+	    var wasChanged = false;
+	    reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
+	      padding: 50
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'browse') {
+	        continueTo(rightClickHouse);
+	      } else if (mode.id === 'move' || mode.id === 'rotate') {
+	        continueTo(retryClickSquare);
+	      }
+	    });
+	    context.map().on('move.intro', function () {
+	      var node = selectMenuItem(context, 'orthogonalize').node();
 
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickHouse);
+	      }
 
-	    function addNode(node) {
-	        if (Object.keys(defaultTags).length === 0) {
-	            enterSelectMode(node);
-	            return;
-	        }
+	      reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
+	        duration: 0,
+	        padding: 50
+	      });
+	    });
+	    context.history().on('change.intro', function () {
+	      wasChanged = true;
+	      context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.
 
-	        var tags = Object.assign({}, node.tags);  // shallow copy
-	        for (var key in defaultTags) {
-	            tags[key] = defaultTags[key];
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
+	          n: 1
+	        })) {
+	          continueTo(doneSquare);
+	        } else {
+	          continueTo(retryClickSquare);
 	        }
+	      }, 500); // after transitioned actions
+	    });
 
-	        context.perform(
-	            actionChangeTags(node.id, tags),
-	            _t('operations.add.annotation.point')
-	        );
-
-	        enterSelectMode(node);
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function retryClickSquare() {
+	    context.enter(modeBrowse(context));
+	    revealHouse(house, helpHtml('intro.buildings.retry_square'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(rightClickHouse);
+	      }
+	    });
 
-	    function cancel() {
-	        context.enter(modeBrowse(context));
+	    function continueTo(nextStep) {
+	      nextStep();
 	    }
+	  }
 
+	  function doneSquare() {
+	    context.history().checkpoint('doneSquare');
+	    revealHouse(house, helpHtml('intro.buildings.done_square'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(addTank);
+	      }
+	    });
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
+	  function addTank() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('doneSquare');
+	    _tankID = null;
+	    var msec = transitionTime(tank, context.map().center());
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
+	    context.map().centerZoomEase(tank, 19.5, msec);
+	    timeout(function () {
+	      reveal('button.add-area', helpHtml('intro.buildings.add_tank'));
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'add-area') return;
+	        continueTo(startTank);
+	      });
+	    }, msec + 100);
 
-	    return mode;
-	}
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	function modeAddNote(context) {
-	    var mode = {
-	        id: 'add-note',
-	        button: 'note',
-	        title: _t('modes.add_note.title'),
-	        description: _t('modes.add_note.description'),
-	        key: _t('modes.add_note.key')
-	    };
+	  function startTank() {
+	    if (context.mode().id !== 'add-area') {
+	      return continueTo(addTank);
+	    }
 
-	    var behavior = behaviorDraw(context)
-	        .on('click', add)
-	        .on('cancel', cancel)
-	        .on('finish', cancel);
+	    _tankID = null;
+	    timeout(function () {
+	      var startString = helpHtml('intro.buildings.start_tank') + helpHtml('intro.buildings.tank_edge_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
+	      revealTank(tank, startString);
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealTank(tank, startString, {
+	          duration: 0
+	        });
+	      });
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'draw-area') return chapter.restart();
+	        continueTo(continueTank);
+	      });
+	    }, 550); // after easing
 
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    function add(loc) {
-	        var osm = services.osm;
-	        if (!osm) { return; }
+	  function continueTank() {
+	    if (context.mode().id !== 'draw-area') {
+	      return continueTo(addTank);
+	    }
 
-	        var note = osmNote({ loc: loc, status: 'open', comments: [] });
-	        osm.replaceNote(note);
+	    _tankID = null;
+	    var continueString = helpHtml('intro.buildings.continue_tank') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_tank');
+	    revealTank(tank, continueString);
+	    context.map().on('move.intro drawn.intro', function () {
+	      revealTank(tank, continueString, {
+	        duration: 0
+	      });
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'draw-area') {
+	        return;
+	      } else if (mode.id === 'select') {
+	        _tankID = context.selectedIDs()[0];
+	        return continueTo(searchPresetTank);
+	      } else {
+	        return continueTo(addTank);
+	      }
+	    });
 
-	        // force a reraw (there is no history change that would otherwise do this)
-	        context.map().pan([0,0]);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        context
-	            .selectedNoteID(note.id)
-	            .enter(modeSelectNote(context, note.id).newFeature(true));
+	  function searchPresetTank() {
+	    if (!_tankID || !context.hasEntity(_tankID)) {
+	      return addTank();
 	    }
 
+	    var ids = context.selectedIDs();
 
-	    function cancel() {
-	        context.enter(modeBrowse(context));
-	    }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	      context.enter(modeSelect(context, [_tankID]));
+	    } // disallow scrolling
 
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    timeout(function () {
+	      // reset pane, in case user somehow happened to change it..
+	      context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	      reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
+	        preset: tankPreset.name()
+	      }));
+	    }, 400); // after preset list pane visible..
 
+	    context.on('enter.intro', function (mode) {
+	      if (!_tankID || !context.hasEntity(_tankID)) {
+	        return continueTo(addTank);
+	      }
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	      var ids = context.selectedIDs();
 
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	        // keep the user's area selected..
+	        context.enter(modeSelect(context, [_tankID])); // reset pane, in case user somehow happened to change it..
 
-	    return mode;
-	}
+	        context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
-	function uiConflicts(context) {
-	    var dispatch$1 = dispatch('cancel', 'save');
-	    var keybinding = utilKeybinding('conflicts');
-	    var _origChanges;
-	    var _conflictList;
-	    var _shownConflictIndex;
+	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	        context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+	        reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
+	          preset: tankPreset.name()
+	        }));
+	        context.history().on('change.intro', null);
+	      }
+	    });
 
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	    function keybindingOn() {
-	        select(document)
-	            .call(keybinding.on('⎋', cancel, true));
+	      if (first.classed('preset-man_made-storage_tank')) {
+	        reveal(first.select('.preset-list-button').node(), helpHtml('intro.buildings.choose_tank', {
+	          preset: tankPreset.name()
+	        }), {
+	          duration: 300
+	        });
+	        context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+	        context.history().on('change.intro', function () {
+	          continueTo(closeEditorTank);
+	        });
+	      }
 	    }
 
-	    function keybindingOff() {
-	        select(document)
-	            .call(keybinding.unbind);
+	    function continueTo(nextStep) {
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    function tryAgain() {
-	        keybindingOff();
-	        dispatch$1.call('save');
+	  function closeEditorTank() {
+	    if (!_tankID || !context.hasEntity(_tankID)) {
+	      return addTank();
 	    }
 
-	    function cancel() {
-	        keybindingOff();
-	        dispatch$1.call('cancel');
+	    var ids = context.selectedIDs();
+
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	      context.enter(modeSelect(context, [_tankID]));
 	    }
 
+	    context.history().checkpoint('hasTank');
+	    context.on('exit.intro', function () {
+	      continueTo(rightClickTank);
+	    });
+	    timeout(function () {
+	      reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
+	        button: icon('#iD-icon-close', 'inline')
+	      }));
+	    }, 500);
 
-	    function conflicts(selection) {
-	        keybindingOn();
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var headerEnter = selection.selectAll('.header')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'header fillL');
+	  function rightClickTank() {
+	    if (!_tankID) return continueTo(addTank);
+	    context.enter(modeBrowse(context));
+	    context.history().reset('hasTank');
+	    context.map().centerEase(tank, 500);
+	    timeout(function () {
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'select') return;
+	        var ids = context.selectedIDs();
+	        if (ids.length !== 1 || ids[0] !== _tankID) return;
+	        timeout(function () {
+	          var node = selectMenuItem(context, 'circularize').node();
+	          if (!node) return;
+	          continueTo(clickCircle);
+	        }, 50); // after menu visible
+	      });
+	      var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_tank' : 'edit_menu_tank_touch'));
+	      revealTank(tank, rightclickString);
+	      context.map().on('move.intro drawn.intro', function () {
+	        revealTank(tank, rightclickString, {
+	          duration: 0
+	        });
+	      });
+	      context.history().on('change.intro', function () {
+	        continueTo(rightClickTank);
+	      });
+	    }, 600);
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'fr')
-	            .on('click', cancel)
-	            .call(svgIcon('#iD-icon-close'));
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        headerEnter
-	            .append('h3')
-	            .text(_t('save.conflict.header'));
+	  function clickCircle() {
+	    if (!_tankID) return chapter.restart();
+	    var entity = context.hasEntity(_tankID);
+	    if (!entity) return continueTo(rightClickTank);
+	    var node = selectMenuItem(context, 'circularize').node();
 
-	        var bodyEnter = selection.selectAll('.body')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'body fillL');
+	    if (!node) {
+	      return continueTo(rightClickTank);
+	    }
 
-	        var conflictsHelpEnter = bodyEnter
-	            .append('div')
-	            .attr('class', 'conflicts-help')
-	            .text(_t('save.conflict.help'));
+	    var wasChanged = false;
+	    reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
+	      padding: 50
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id === 'browse') {
+	        continueTo(rightClickTank);
+	      } else if (mode.id === 'move' || mode.id === 'rotate') {
+	        continueTo(retryClickCircle);
+	      }
+	    });
+	    context.map().on('move.intro', function () {
+	      var node = selectMenuItem(context, 'circularize').node();
 
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickTank);
+	      }
 
-	        // Download changes link
-	        var detected = utilDetect();
-	        var changeset = new osmChangeset();
+	      reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
+	        duration: 0,
+	        padding: 50
+	      });
+	    });
+	    context.history().on('change.intro', function () {
+	      wasChanged = true;
+	      context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.
 
-	        delete changeset.id;  // Export without changeset_id
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
+	          n: 1
+	        })) {
+	          continueTo(play);
+	        } else {
+	          continueTo(retryClickCircle);
+	        }
+	      }, 500); // after transitioned actions
+	    });
 
-	        var data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
-	        var blob = new Blob([data], { type: 'text/xml;charset=utf-8;' });
-	        var fileName = 'changes.osc';
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var linkEnter = conflictsHelpEnter.selectAll('.download-changes')
-	            .append('a')
-	            .attr('class', 'download-changes');
+	  function retryClickCircle() {
+	    context.enter(modeBrowse(context));
+	    revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(rightClickTank);
+	      }
+	    });
 
-	        if (detected.download) {      // All except IE11 and Edge
-	            linkEnter                 // download the data as a file
-	                .attr('href', window.URL.createObjectURL(blob))
-	                .attr('download', fileName);
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
-	        } else {                      // IE11 and Edge
-	            linkEnter                 // open data uri in a new tab
-	                .attr('target', '_blank')
-	                .on('click.download', function() {
-	                    navigator.msSaveBlob(blob, fileName);
-	                });
-	        }
+	  function play() {
+	    dispatch$1.call('done');
+	    reveal('.ideditor', helpHtml('intro.buildings.play', {
+	      next: _t('intro.startediting.title')
+	    }), {
+	      tooltipBox: '.intro-nav-wrap .chapter-startEditing',
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        reveal('.ideditor');
+	      }
+	    });
+	  }
 
-	        linkEnter
-	            .call(svgIcon('#iD-icon-load', 'inline'))
-	            .append('span')
-	            .text(_t('save.conflict.download_changes'));
+	  chapter.enter = function () {
+	    addHouse();
+	  };
 
+	  chapter.exit = function () {
+	    timeouts.forEach(window.clearTimeout);
+	    context.on('enter.intro exit.intro', null);
+	    context.map().on('move.intro drawn.intro', null);
+	    context.history().on('change.intro', null);
+	    context.container().select('.inspector-wrap').on('wheel.intro', null);
+	    context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+	    context.container().select('.more-fields .combobox-input').on('click.intro', null);
+	  };
 
-	        bodyEnter
-	            .append('div')
-	            .attr('class', 'conflict-container fillL3')
-	            .call(showConflict, 0);
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        bodyEnter
-	            .append('div')
-	            .attr('class', 'conflicts-done')
-	            .attr('opacity', 0)
-	            .style('display', 'none')
-	            .text(_t('save.conflict.done'));
+	  return utilRebind(chapter, dispatch$1, 'on');
+	}
 
-	        var buttonsEnter = bodyEnter
-	            .append('div')
-	            .attr('class','buttons col12 joined conflicts-buttons');
+	function uiIntroStartEditing(context, reveal) {
+	  var dispatch$1 = dispatch('done', 'startEditing');
+	  var modalSelection = select(null);
+	  var chapter = {
+	    title: 'intro.startediting.title'
+	  };
 
-	        buttonsEnter
-	            .append('button')
-	            .attr('disabled', _conflictList.length > 1)
-	            .attr('class', 'action conflicts-button col6')
-	            .text(_t('save.title'))
-	            .on('click.try_again', tryAgain);
+	  function showHelp() {
+	    reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        shortcuts();
+	      }
+	    });
+	  }
 
-	        buttonsEnter
-	            .append('button')
-	            .attr('class', 'secondary-action conflicts-button col6')
-	            .text(_t('confirm.cancel'))
-	            .on('click.cancel', cancel);
-	    }
+	  function shortcuts() {
+	    reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        showSave();
+	      }
+	    });
+	  }
 
+	  function showSave() {
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-	    function showConflict(selection, index) {
-	        index = utilWrap(index, _conflictList.length);
-	        _shownConflictIndex = index;
+	    reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        showStart();
+	      }
+	    });
+	  }
 
-	        var parent = select(selection.node().parentNode);
+	  function showStart() {
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-	        // enable save button if this is the last conflict being reviewed..
-	        if (index === _conflictList.length - 1) {
-	            window.setTimeout(function() {
-	                parent.select('.conflicts-button')
-	                    .attr('disabled', null);
+	    modalSelection = uiModal(context.container());
+	    modalSelection.select('.modal').attr('class', 'modal-splash modal');
+	    modalSelection.selectAll('.close').remove();
+	    var startbutton = modalSelection.select('.content').attr('class', 'fillL').append('button').attr('class', 'modal-section huge-modal-button').on('click', function () {
+	      modalSelection.remove();
+	    });
+	    startbutton.append('svg').attr('class', 'illustration').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+	    startbutton.append('h2').html(_t.html('intro.startediting.start'));
+	    dispatch$1.call('startEditing');
+	  }
 
-	                parent.select('.conflicts-done')
-	                    .transition()
-	                    .attr('opacity', 1)
-	                    .style('display', 'block');
-	            }, 250);
-	        }
+	  chapter.enter = function () {
+	    showHelp();
+	  };
 
-	        var conflict = selection
-	            .selectAll('.conflict')
-	            .data([_conflictList[index]]);
+	  chapter.exit = function () {
+	    modalSelection.remove();
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+	  };
 
-	        conflict.exit()
-	            .remove();
+	  return utilRebind(chapter, dispatch$1, 'on');
+	}
 
-	        var conflictEnter = conflict.enter()
-	            .append('div')
-	            .attr('class', 'conflict');
-
-	        conflictEnter
-	            .append('h4')
-	            .attr('class', 'conflict-count')
-	            .text(_t('save.conflict.count', { num: index + 1, total: _conflictList.length }));
-
-	        conflictEnter
-	            .append('a')
-	            .attr('class', 'conflict-description')
-	            .attr('href', '#')
-	            .text(function(d) { return d.name; })
-	            .on('click', function(d) {
-	                event.preventDefault();
-	                zoomToEntity(d.id);
-	            });
+	var chapterUi = {
+	  welcome: uiIntroWelcome,
+	  navigation: uiIntroNavigation,
+	  point: uiIntroPoint,
+	  area: uiIntroArea,
+	  line: uiIntroLine,
+	  building: uiIntroBuilding,
+	  startEditing: uiIntroStartEditing
+	};
+	var chapterFlow = ['welcome', 'navigation', 'point', 'area', 'line', 'building', 'startEditing'];
+	function uiIntro(context) {
+	  var INTRO_IMAGERY = 'EsriWorldImageryClarity';
+	  var _introGraph = {};
 
-	        var details = conflictEnter
-	            .append('div')
-	            .attr('class', 'conflict-detail-container');
+	  var _currChapter;
 
-	        details
-	            .append('ul')
-	            .attr('class', 'conflict-detail-list')
-	            .selectAll('li')
-	            .data(function(d) { return d.details || []; })
-	            .enter()
-	            .append('li')
-	            .attr('class', 'conflict-detail-item')
-	            .html(function(d) { return d; });
+	  function intro(selection) {
+	    _mainFileFetcher.get('intro_graph').then(function (dataIntroGraph) {
+	      // create entities for intro graph and localize names
+	      for (var id in dataIntroGraph) {
+	        if (!_introGraph[id]) {
+	          _introGraph[id] = osmEntity(localize(dataIntroGraph[id]));
+	        }
+	      }
 
-	        details
-	            .append('div')
-	            .attr('class', 'conflict-choices')
-	            .call(addChoices);
+	      selection.call(startIntro);
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  }
 
-	        details
-	            .append('div')
-	            .attr('class', 'conflict-nav-buttons joined cf')
-	            .selectAll('button')
-	            .data(['previous', 'next'])
-	            .enter()
-	            .append('button')
-	            .text(function(d) { return _t('save.conflict.' + d); })
-	            .attr('class', 'conflict-nav-button action col6')
-	            .attr('disabled', function(d, i) {
-	                return (i === 0 && index === 0) ||
-	                    (i === 1 && index === _conflictList.length - 1) || null;
-	            })
-	            .on('click', function(d, i) {
-	                event.preventDefault();
-
-	                var container = parent.selectAll('.conflict-container');
-	                var sign = (i === 0 ? -1 : 1);
-
-	                container
-	                    .selectAll('.conflict')
-	                    .remove();
-
-	                container
-	                    .call(showConflict, index + sign);
-	            });
+	  function startIntro(selection) {
+	    context.enter(modeBrowse(context)); // Save current map state
 
-	    }
+	    var osm = context.connection();
+	    var history = context.history().toJSON();
+	    var hash = window.location.hash;
+	    var center = context.map().center();
+	    var zoom = context.map().zoom();
+	    var background = context.background().baseLayerSource();
+	    var overlays = context.background().overlayLayerSources();
+	    var opacity = context.container().selectAll('.main-map .layer-background').style('opacity');
+	    var caches = osm && osm.caches();
+	    var baseEntities = context.history().graph().base().entities; // Show sidebar and disable the sidebar resizing button
+	    // (this needs to be before `context.inIntro(true)`)
 
+	    context.ui().sidebar.expand();
+	    context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving
 
-	    function addChoices(selection) {
-	        var choices = selection
-	            .append('ul')
-	            .attr('class', 'layer-list')
-	            .selectAll('li')
-	            .data(function(d) { return d.choices || []; });
+	    context.inIntro(true); // Load semi-real data used in intro
 
-	        // enter
-	        var choicesEnter = choices.enter()
-	            .append('li')
-	            .attr('class', 'layer');
+	    if (osm) {
+	      osm.toggle(false).reset();
+	    }
 
-	        var labelEnter = choicesEnter
-	            .append('label');
+	    context.history().reset();
+	    context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
+	    context.history().checkpoint('initial'); // Setup imagery
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', function(d) { return d.id; })
-	            .on('change', function(d, i) {
-	                var ul = this.parentNode.parentNode.parentNode;
-	                ul.__data__.chosen = i;
-	                choose(ul, d);
-	            });
+	    var imagery = context.background().findSource(INTRO_IMAGERY);
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) { return d.text; });
-
-	        // update
-	        choicesEnter
-	            .merge(choices)
-	            .each(function(d, i) {
-	                var ul = this.parentNode;
-	                if (ul.__data__.chosen === i) {
-	                    choose(ul, d);
-	                }
-	            });
+	    if (imagery) {
+	      context.background().baseLayerSource(imagery);
+	    } else {
+	      context.background().bing();
 	    }
 
+	    overlays.forEach(function (d) {
+	      return context.background().toggleOverlayLayer(d);
+	    }); // Setup data layers (only OSM)
 
-	    function choose(ul, datum) {
-	        if (event) { event.preventDefault(); }
+	    var layers = context.layers();
+	    layers.all().forEach(function (item) {
+	      // if the layer has the function `enabled`
+	      if (typeof item.layer.enabled === 'function') {
+	        item.layer.enabled(item.id === 'osm');
+	      }
+	    });
+	    context.container().selectAll('.main-map .layer-background').style('opacity', 1);
+	    var curtain = uiCurtain(context.container().node());
+	    selection.call(curtain); // Store that the user started the walkthrough..
 
-	        select(ul)
-	            .selectAll('li')
-	            .classed('active', function(d) { return d === datum; })
-	            .selectAll('input')
-	            .property('checked', function(d) { return d === datum; });
+	    corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..
 
-	        var extent = geoExtent();
-	        var entity;
+	    var storedProgress = corePreferences('walkthrough_progress') || '';
+	    var progress = storedProgress.split(';').filter(Boolean);
+	    var chapters = chapterFlow.map(function (chapter, i) {
+	      var s = chapterUi[chapter](context, curtain.reveal).on('done', function () {
+	        buttons.filter(function (d) {
+	          return d.title === s.title;
+	        }).classed('finished', true);
 
-	        entity = context.graph().hasEntity(datum.id);
-	        if (entity) { extent._extend(entity.extent(context.graph())); }
+	        if (i < chapterFlow.length - 1) {
+	          var next = chapterFlow[i + 1];
+	          context.container().select("button.chapter-".concat(next)).classed('next', true);
+	        } // Store walkthrough progress..
 
-	        datum.action();
 
-	        entity = context.graph().hasEntity(datum.id);
-	        if (entity) { extent._extend(entity.extent(context.graph())); }
+	        progress.push(chapter);
+	        corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
+	      });
+	      return s;
+	    });
+	    chapters[chapters.length - 1].on('startEditing', function () {
+	      // Store walkthrough progress..
+	      progress.push('startEditing');
+	      corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';')); // Store if walkthrough is completed..
 
-	        zoomToEntity(datum.id, extent);
-	    }
+	      var incomplete = utilArrayDifference(chapterFlow, progress);
 
+	      if (!incomplete.length) {
+	        corePreferences('walkthrough_completed', 'yes');
+	      }
 
-	    function zoomToEntity(id, extent) {
-	        context.surface().selectAll('.hover')
-	            .classed('hover', false);
+	      curtain.remove();
+	      navwrap.remove();
+	      context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
+	      context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
 
-	        var entity = context.graph().hasEntity(id);
-	        if (entity) {
-	            if (extent) {
-	                context.map().trimmedExtent(extent);
-	            } else {
-	                context.map().zoomToEase(entity);
-	            }
-	            context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph()))
-	                .classed('hover', true);
-	        }
-	    }
+	      if (osm) {
+	        osm.toggle(true).reset().caches(caches);
+	      }
 
+	      context.history().reset().merge(Object.values(baseEntities));
+	      context.background().baseLayerSource(background);
+	      overlays.forEach(function (d) {
+	        return context.background().toggleOverlayLayer(d);
+	      });
 
-	    // The conflict list should be an array of objects like:
-	    // {
-	    //     id: id,
-	    //     name: entityName(local),
-	    //     details: merge.conflicts(),
-	    //     chosen: 1,
-	    //     choices: [
-	    //         choice(id, keepMine, forceLocal),
-	    //         choice(id, keepTheirs, forceRemote)
-	    //     ]
-	    // }
-	    conflicts.conflictList = function(_) {
-	        if (!arguments.length) { return _conflictList; }
-	        _conflictList = _;
-	        return conflicts;
-	    };
+	      if (history) {
+	        context.history().fromJSON(history, false);
+	      }
 
+	      context.map().centerZoom(center, zoom);
+	      window.location.replace(hash);
+	      context.inIntro(false);
+	    });
+	    var navwrap = selection.append('div').attr('class', 'intro-nav-wrap fillD');
+	    navwrap.append('svg').attr('class', 'intro-nav-wrap-logo').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+	    var buttonwrap = navwrap.append('div').attr('class', 'joined').selectAll('button.chapter');
+	    var buttons = buttonwrap.data(chapters).enter().append('button').attr('class', function (d, i) {
+	      return "chapter chapter-".concat(chapterFlow[i]);
+	    }).on('click', enterChapter);
+	    buttons.append('span').html(function (d) {
+	      return _t.html(d.title);
+	    });
+	    buttons.append('span').attr('class', 'status').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
+	    enterChapter(null, chapters[0]);
 
-	    conflicts.origChanges = function(_) {
-	        if (!arguments.length) { return _origChanges; }
-	        _origChanges = _;
-	        return conflicts;
-	    };
+	    function enterChapter(d3_event, newChapter) {
+	      if (_currChapter) {
+	        _currChapter.exit();
+	      }
 
+	      context.enter(modeBrowse(context));
+	      _currChapter = newChapter;
 
-	    conflicts.shownEntityIds = function() {
-	        if (_conflictList && typeof _shownConflictIndex === 'number') {
-	            return [_conflictList[_shownConflictIndex].id];
-	        }
-	        return [];
-	    };
+	      _currChapter.enter();
 
+	      buttons.classed('next', false).classed('active', function (d) {
+	        return d.title === _currChapter.title;
+	      });
+	    }
+	  }
 
-	    return utilRebind(conflicts, dispatch$1, 'on');
+	  return intro;
 	}
 
-	function uiConfirm(selection) {
-	    var modalSelection = uiModal(selection);
+	function uiIssuesInfo(context) {
+	  var warningsItem = {
+	    id: 'warnings',
+	    count: 0,
+	    iconID: 'iD-icon-alert',
+	    descriptionID: 'issues.warnings_and_errors'
+	  };
+	  var resolvedItem = {
+	    id: 'resolved',
+	    count: 0,
+	    iconID: 'iD-icon-apply',
+	    descriptionID: 'issues.user_resolved_issues'
+	  };
+
+	  function update(selection) {
+	    var shownItems = [];
+	    var liveIssues = context.validator().getIssues({
+	      what: corePreferences('validate-what') || 'edited',
+	      where: corePreferences('validate-where') || 'all'
+	    });
 
-	    modalSelection.select('.modal')
-	        .classed('modal-alert', true);
+	    if (liveIssues.length) {
+	      warningsItem.count = liveIssues.length;
+	      shownItems.push(warningsItem);
+	    }
 
-	    var section = modalSelection.select('.content');
+	    if (corePreferences('validate-what') === 'all') {
+	      var resolvedIssues = context.validator().getResolvedIssues();
 
-	    section.append('div')
-	        .attr('class', 'modal-section header');
+	      if (resolvedIssues.length) {
+	        resolvedItem.count = resolvedIssues.length;
+	        shownItems.push(resolvedItem);
+	      }
+	    }
 
-	    section.append('div')
-	        .attr('class', 'modal-section message-text');
+	    var chips = selection.selectAll('.chip').data(shownItems, function (d) {
+	      return d.id;
+	    });
+	    chips.exit().remove();
+	    var enter = chips.enter().append('a').attr('class', function (d) {
+	      return 'chip ' + d.id + '-count';
+	    }).attr('href', '#').each(function (d) {
+	      var chipSelection = select(this);
+	      var tooltipBehavior = uiTooltip().placement('top').title(_t.html(d.descriptionID));
+	      chipSelection.call(tooltipBehavior).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        tooltipBehavior.hide(select(this)); // open the Issues pane
+
+	        context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
+	      });
+	      chipSelection.call(svgIcon('#' + d.iconID));
+	    });
+	    enter.append('span').attr('class', 'count');
+	    enter.merge(chips).selectAll('span.count').html(function (d) {
+	      return d.count.toString();
+	    });
+	  }
 
-	    var buttons = section.append('div')
-	        .attr('class', 'modal-section buttons cf');
+	  return function (selection) {
+	    update(selection);
+	    context.validator().on('validated.infobox', function () {
+	      update(selection);
+	    });
+	  };
+	}
 
+	function uiMapInMap(context) {
+	  function mapInMap(selection) {
+	    var backgroundLayer = rendererTileLayer(context);
+	    var overlayLayers = {};
+	    var projection = geoRawMercator();
+	    var dataLayer = svgData(projection, context).showLabels(false);
+	    var debugLayer = svgDebug(projection, context);
+	    var zoom = d3_zoom().scaleExtent([geoZoomToScale(0.5), geoZoomToScale(24)]).on('start', zoomStarted).on('zoom', zoomed).on('end', zoomEnded);
+	    var wrap = select(null);
+	    var tiles = select(null);
+	    var viewport = select(null);
+	    var _isTransformed = false;
+	    var _isHidden = true;
+	    var _skipEvents = false;
+	    var _gesture = null;
+	    var _zDiff = 6; // by default, minimap renders at (main zoom - 6)
 
-	    modalSelection.okButton = function() {
-	        buttons
-	            .append('button')
-	            .attr('class', 'button ok-button action')
-	            .on('click.confirm', function() {
-	                modalSelection.remove();
-	            })
-	            .text(_t('confirm.okay'))
-	            .node()
-	            .focus();
+	    var _dMini; // dimensions of minimap
 
-	        return modalSelection;
-	    };
 
+	    var _cMini; // center pixel of minimap
 
-	    return modalSelection;
-	}
 
-	function uiChangesetEditor(context) {
-	    var dispatch$1 = dispatch('change');
-	    var formFields = uiFormFields(context);
-	    var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
-	    var _fieldsArr;
-	    var _tags;
-	    var _changesetID;
+	    var _tStart; // transform at start of gesture
 
 
-	    function changesetEditor(selection) {
-	        render(selection);
-	    }
+	    var _tCurr; // transform at most recent event
 
 
-	    function render(selection) {
-	        var initial = false;
+	    var _timeoutID;
 
-	        if (!_fieldsArr) {
-	            initial = true;
-	            var presets = _mainPresetIndex;
+	    function zoomStarted() {
+	      if (_skipEvents) return;
+	      _tStart = _tCurr = projection.transform();
+	      _gesture = null;
+	    }
 
-	            _fieldsArr = [
-	                uiField(context, presets.field('comment'), null, { show: true, revert: false }),
-	                uiField(context, presets.field('source'), null, { show: false, revert: false }),
-	                uiField(context, presets.field('hashtags'), null, { show: false, revert: false }) ];
+	    function zoomed(d3_event) {
+	      if (_skipEvents) return;
+	      var x = d3_event.transform.x;
+	      var y = d3_event.transform.y;
+	      var k = d3_event.transform.k;
+	      var isZooming = k !== _tStart.k;
+	      var isPanning = x !== _tStart.x || y !== _tStart.y;
 
-	            _fieldsArr.forEach(function(field) {
-	                field
-	                    .on('change', function(t, onInput) {
-	                        dispatch$1.call('change', field, undefined, t, onInput);
-	                    });
-	            });
-	        }
+	      if (!isZooming && !isPanning) {
+	        return; // no change
+	      } // lock in either zooming or panning, don't allow both in minimap.
 
-	        _fieldsArr.forEach(function(field) {
-	            field
-	                .tags(_tags);
-	        });
 
+	      if (!_gesture) {
+	        _gesture = isZooming ? 'zoom' : 'pan';
+	      }
 
-	        selection
-	            .call(formFields.fieldsArr(_fieldsArr));
+	      var tMini = projection.transform();
+	      var tX, tY, scale;
 
+	      if (_gesture === 'zoom') {
+	        scale = k / tMini.k;
+	        tX = (_cMini[0] / scale - _cMini[0]) * scale;
+	        tY = (_cMini[1] / scale - _cMini[1]) * scale;
+	      } else {
+	        k = tMini.k;
+	        scale = 1;
+	        tX = x - tMini.x;
+	        tY = y - tMini.y;
+	      }
 
-	        if (initial) {
-	            var commentField = selection.select('.form-field-comment textarea');
-	            var commentNode = commentField.node();
+	      utilSetTransform(tiles, tX, tY, scale);
+	      utilSetTransform(viewport, 0, 0, scale);
+	      _isTransformed = true;
+	      _tCurr = identity$2.translate(x, y).scale(k);
+	      var zMain = geoScaleToZoom(context.projection.scale());
+	      var zMini = geoScaleToZoom(k);
+	      _zDiff = zMain - zMini;
+	      queueRedraw();
+	    }
+
+	    function zoomEnded() {
+	      if (_skipEvents) return;
+	      if (_gesture !== 'pan') return;
+	      updateProjection();
+	      _gesture = null;
+	      context.map().center(projection.invert(_cMini)); // recenter main map..
+	    }
+
+	    function updateProjection() {
+	      var loc = context.map().center();
+	      var tMain = context.projection.transform();
+	      var zMain = geoScaleToZoom(tMain.k);
+	      var zMini = Math.max(zMain - _zDiff, 0.5);
+	      var kMini = geoZoomToScale(zMini);
+	      projection.translate([tMain.x, tMain.y]).scale(kMini);
+	      var point = projection(loc);
+	      var mouse = _gesture === 'pan' ? geoVecSubtract([_tCurr.x, _tCurr.y], [_tStart.x, _tStart.y]) : [0, 0];
+	      var xMini = _cMini[0] - point[0] + tMain.x + mouse[0];
+	      var yMini = _cMini[1] - point[1] + tMain.y + mouse[1];
+	      projection.translate([xMini, yMini]).clipExtent([[0, 0], _dMini]);
+	      _tCurr = projection.transform();
+
+	      if (_isTransformed) {
+	        utilSetTransform(tiles, 0, 0);
+	        utilSetTransform(viewport, 0, 0);
+	        _isTransformed = false;
+	      }
 
-	            if (commentNode) {
-	                commentNode.focus();
-	                commentNode.select();
-	            }
+	      zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+	      _skipEvents = true;
+	      wrap.call(zoom.transform, _tCurr);
+	      _skipEvents = false;
+	    }
 
-	            // trigger a 'blur' event so that comment field can be cleaned
-	            // and checked for hashtags, even if retrieved from localstorage
-	            utilTriggerEvent(commentField, 'blur');
+	    function redraw() {
+	      clearTimeout(_timeoutID);
+	      if (_isHidden) return;
+	      updateProjection();
+	      var zMini = geoScaleToZoom(projection.scale()); // setup tile container
 
-	            var osm = context.connection();
-	            if (osm) {
-	                osm.userChangesets(function (err, changesets) {
-	                    if (err) { return; }
-
-	                    var comments = changesets.map(function(changeset) {
-	                        var comment = changeset.tags.comment;
-	                        return comment ? { title: comment, value: comment } : null;
-	                    }).filter(Boolean);
-
-	                    commentField
-	                        .call(commentCombo
-	                            .data(utilArrayUniqBy(comments, 'title'))
-	                        );
-	                });
-	            }
-	        }
+	      tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
+	      tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background
 
-	        // Add warning if comment mentions Google
-	        var hasGoogle = _tags.comment.match(/google/i);
-	        var commentWarning = selection.select('.form-field-comment').selectAll('.comment-warning')
-	            .data(hasGoogle ? [0] : []);
+	      backgroundLayer.source(context.background().baseLayerSource()).projection(projection).dimensions(_dMini);
+	      var background = tiles.selectAll('.map-in-map-background').data([0]);
+	      background.enter().append('div').attr('class', 'map-in-map-background').merge(background).call(backgroundLayer); // redraw overlay
 
-	        commentWarning.exit()
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 0)
-	            .remove();
+	      var overlaySources = context.background().overlayLayerSources();
+	      var activeOverlayLayers = [];
 
-	        var commentEnter = commentWarning.enter()
-	            .insert('div', '.tag-reference-body')
-	            .attr('class', 'field-warning comment-warning')
-	            .style('opacity', 0);
+	      for (var i = 0; i < overlaySources.length; i++) {
+	        if (overlaySources[i].validZoom(zMini)) {
+	          if (!overlayLayers[i]) overlayLayers[i] = rendererTileLayer(context);
+	          activeOverlayLayers.push(overlayLayers[i].source(overlaySources[i]).projection(projection).dimensions(_dMini));
+	        }
+	      }
 
-	        commentEnter
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-alert', 'inline'))
-	            .attr('href', _t('commit.google_warning_link'))
-	            .append('span')
-	            .text(_t('commit.google_warning'));
+	      var overlay = tiles.selectAll('.map-in-map-overlay').data([0]);
+	      overlay = overlay.enter().append('div').attr('class', 'map-in-map-overlay').merge(overlay);
+	      var overlays = overlay.selectAll('div').data(activeOverlayLayers, function (d) {
+	        return d.source().name();
+	      });
+	      overlays.exit().remove();
+	      overlays = overlays.enter().append('div').merge(overlays).each(function (layer) {
+	        select(this).call(layer);
+	      });
+	      var dataLayers = tiles.selectAll('.map-in-map-data').data([0]);
+	      dataLayers.exit().remove();
+	      dataLayers = dataLayers.enter().append('svg').attr('class', 'map-in-map-data').merge(dataLayers).call(dataLayer).call(debugLayer); // redraw viewport bounding box
+
+	      if (_gesture !== 'pan') {
+	        var getPath = d3_geoPath(projection);
+	        var bbox = {
+	          type: 'Polygon',
+	          coordinates: [context.map().extent().polygon()]
+	        };
+	        viewport = wrap.selectAll('.map-in-map-viewport').data([0]);
+	        viewport = viewport.enter().append('svg').attr('class', 'map-in-map-viewport').merge(viewport);
+	        var path = viewport.selectAll('.map-in-map-bbox').data([bbox]);
+	        path.enter().append('path').attr('class', 'map-in-map-bbox').merge(path).attr('d', getPath).classed('thick', function (d) {
+	          return getPath.area(d) < 30;
+	        });
+	      }
+	    }
 
-	        commentEnter
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 1);
+	    function queueRedraw() {
+	      clearTimeout(_timeoutID);
+	      _timeoutID = setTimeout(function () {
+	        redraw();
+	      }, 750);
 	    }
 
+	    function toggle(d3_event) {
+	      if (d3_event) d3_event.preventDefault();
+	      _isHidden = !_isHidden;
+	      context.container().select('.minimap-toggle-item').classed('active', !_isHidden).select('input').property('checked', !_isHidden);
 
-	    changesetEditor.tags = function(_) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = _;
-	        // Don't reset _fieldsArr here.
-	        return changesetEditor;
-	    };
+	      if (_isHidden) {
+	        wrap.style('display', 'block').style('opacity', '1').transition().duration(200).style('opacity', '0').on('end', function () {
+	          selection.selectAll('.map-in-map').style('display', 'none');
+	        });
+	      } else {
+	        wrap.style('display', 'block').style('opacity', '0').transition().duration(200).style('opacity', '1').on('end', function () {
+	          redraw();
+	        });
+	      }
+	    }
 
+	    uiMapInMap.toggle = toggle;
+	    wrap = selection.selectAll('.map-in-map').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'map-in-map').style('display', _isHidden ? 'none' : 'block').call(zoom).on('dblclick.zoom', null).merge(wrap); // reflow warning: Hardcode dimensions - currently can't resize it anyway..
 
-	    changesetEditor.changesetID = function(_) {
-	        if (!arguments.length) { return _changesetID; }
-	        if (_changesetID === _) { return changesetEditor; }
-	        _changesetID = _;
-	        _fieldsArr = null;
-	        return changesetEditor;
-	    };
+	    _dMini = [200, 150]; //utilGetDimensions(wrap);
 
+	    _cMini = geoVecScale(_dMini, 0.5);
+	    context.map().on('drawn.map-in-map', function (drawn) {
+	      if (drawn.full === true) {
+	        redraw();
+	      }
+	    });
+	    redraw();
+	    context.keybinding().on(_t('background.minimap.key'), toggle);
+	  }
 
-	    return utilRebind(changesetEditor, dispatch$1, 'on');
+	  return mapInMap;
 	}
 
-	function uiSectionChanges(context) {
-	    var detected = utilDetect();
-
-	    var _discardTags = {};
-	    _mainFileFetcher.get('discarded')
-	        .then(function(d) { _discardTags = d; })
-	        .catch(function() { /* ignore */ });
-
-	    var section = uiSection('changes-list', context)
-	        .title(function() {
-	            var history = context.history();
-	            var summary = history.difference().summary();
-	            return _t('commit.changes', { count: summary.length });
-	        })
-	        .disclosureContent(renderDisclosureContent);
-
-	    function renderDisclosureContent(selection) {
-	        var history = context.history();
-	        var summary = history.difference().summary();
+	function uiNotice(context) {
+	  return function (selection) {
+	    var div = selection.append('div').attr('class', 'notice');
+	    var button = div.append('button').attr('class', 'zoom-to notice fillD').on('click', function () {
+	      context.map().zoomEase(context.minEditableZoom());
+	    }).on('wheel', function (d3_event) {
+	      // let wheel events pass through #4482
+	      var e2 = new WheelEvent(d3_event.type, d3_event);
+	      context.surface().node().dispatchEvent(e2);
+	    });
+	    button.call(svgIcon('#iD-icon-plus', 'pre-text')).append('span').attr('class', 'label').html(_t.html('zoom_in_edit'));
 
-	        var container = selection.selectAll('.commit-section')
-	            .data([0]);
+	    function disableTooHigh() {
+	      var canEdit = context.map().zoom() >= context.minEditableZoom();
+	      div.style('display', canEdit ? 'none' : 'block');
+	    }
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'commit-section');
+	    context.map().on('move.notice', debounce(disableTooHigh, 500));
+	    disableTooHigh();
+	  };
+	}
 
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'changeset-list');
+	function uiPhotoviewer(context) {
+	  var dispatch$1 = dispatch('resize');
 
-	        container = containerEnter
-	            .merge(container);
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
+	  function photoviewer(selection) {
+	    selection.append('button').attr('class', 'thumb-hide').on('click', function () {
+	      if (services.streetside) {
+	        services.streetside.hideViewer(context);
+	      }
 
-	        var items = container.select('ul').selectAll('li')
-	            .data(summary);
+	      if (services.mapillary) {
+	        services.mapillary.hideViewer(context);
+	      }
 
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'change-item');
+	      if (services.openstreetcam) {
+	        services.openstreetcam.hideViewer(context);
+	      }
+	    }).append('div').call(svgIcon('#iD-icon-close'));
+
+	    function preventDefault(d3_event) {
+	      d3_event.preventDefault();
+	    }
+
+	    selection.append('button').attr('class', 'resize-handle-xy').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch$1, {
+	      resizeOnX: true,
+	      resizeOnY: true
+	    }));
+	    selection.append('button').attr('class', 'resize-handle-x').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch$1, {
+	      resizeOnX: true
+	    }));
+	    selection.append('button').attr('class', 'resize-handle-y').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch$1, {
+	      resizeOnY: true
+	    }));
+
+	    function buildResizeListener(target, eventName, dispatch, options) {
+	      var resizeOnX = !!options.resizeOnX;
+	      var resizeOnY = !!options.resizeOnY;
+	      var minHeight = options.minHeight || 240;
+	      var minWidth = options.minWidth || 320;
+	      var pointerId;
+	      var startX;
+	      var startY;
+	      var startWidth;
+	      var startHeight;
+
+	      function startResize(d3_event) {
+	        if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        var mapSize = context.map().dimensions();
+
+	        if (resizeOnX) {
+	          var maxWidth = mapSize[0];
+	          var newWidth = clamp(startWidth + d3_event.clientX - startX, minWidth, maxWidth);
+	          target.style('width', newWidth + 'px');
+	        }
+
+	        if (resizeOnY) {
+	          var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map
+
+	          var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
+	          target.style('height', newHeight + 'px');
+	        }
+
+	        dispatch.call(eventName, target, utilGetDimensions(target, true));
+	      }
 
-	        itemsEnter
-	            .each(function(d) {
-	                select(this)
-	                    .call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
-	            });
+	      function clamp(num, min, max) {
+	        return Math.max(min, Math.min(num, max));
+	      }
 
-	        itemsEnter
-	            .append('span')
-	            .attr('class', 'change-type')
-	            .text(function(d) { return _t('commit.' + d.changeType) + ' '; });
-
-	        itemsEnter
-	            .append('strong')
-	            .attr('class', 'entity-type')
-	            .text(function(d) {
-	                var matched = _mainPresetIndex.match(d.entity, d.graph);
-	                return (matched && matched.name()) || utilDisplayType(d.entity.id);
-	            });
+	      function stopResize(d3_event) {
+	        if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation(); // remove all the listeners we added
 
-	        itemsEnter
-	            .append('span')
-	            .attr('class', 'entity-name')
-	            .text(function(d) {
-	                var name = utilDisplayName(d.entity) || '',
-	                    string = '';
-	                if (name !== '') {
-	                    string += ':';
-	                }
-	                return string += ' ' + name;
-	            });
+	        select(window).on('.' + eventName, null);
+	      }
 
-	        itemsEnter
-	            .style('opacity', 0)
-	            .transition()
-	            .style('opacity', 1);
+	      return function initResize(d3_event) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        pointerId = d3_event.pointerId || 'mouse';
+	        startX = d3_event.clientX;
+	        startY = d3_event.clientY;
+	        var targetRect = target.node().getBoundingClientRect();
+	        startWidth = targetRect.width;
+	        startHeight = targetRect.height;
+	        select(window).on(_pointerPrefix + 'move.' + eventName, startResize, false).on(_pointerPrefix + 'up.' + eventName, stopResize, false);
 
-	        items = itemsEnter
-	            .merge(items);
+	        if (_pointerPrefix === 'pointer') {
+	          select(window).on('pointercancel.' + eventName, stopResize, false);
+	        }
+	      };
+	    }
+	  }
 
-	        items
-	            .on('mouseover', mouseover)
-	            .on('mouseout', mouseout)
-	            .on('click', click);
+	  photoviewer.onMapResize = function () {
+	    var photoviewer = context.container().select('.photoviewer');
+	    var content = context.container().select('.main-content');
+	    var mapDimensions = utilGetDimensions(content, true); // shrink photo viewer if it is too big
+	    // (-90 preserves space at top and bottom of map used by menus)
 
+	    var photoDimensions = utilGetDimensions(photoviewer, true);
 
-	        // Download changeset link
-	        var changeset = new osmChangeset().update({ id: undefined });
-	        var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	    if (photoDimensions[0] > mapDimensions[0] || photoDimensions[1] > mapDimensions[1] - 90) {
+	      var setPhotoDimensions = [Math.min(photoDimensions[0], mapDimensions[0]), Math.min(photoDimensions[1], mapDimensions[1] - 90)];
+	      photoviewer.style('width', setPhotoDimensions[0] + 'px').style('height', setPhotoDimensions[1] + 'px');
+	      dispatch$1.call('resize', photoviewer, setPhotoDimensions);
+	    }
+	  };
 
-	        delete changeset.id;  // Export without chnageset_id
+	  return utilRebind(photoviewer, dispatch$1, 'on');
+	}
 
-	        var data = JXON.stringify(changeset.osmChangeJXON(changes));
-	        var blob = new Blob([data], {type: 'text/xml;charset=utf-8;'});
-	        var fileName = 'changes.osc';
+	function uiRestore(context) {
+	  return function (selection) {
+	    if (!context.history().hasRestorableChanges()) return;
+	    var modalSelection = uiModal(selection, true);
+	    modalSelection.select('.modal').attr('class', 'modal fillL');
+	    var introModal = modalSelection.select('.content');
+	    introModal.append('div').attr('class', 'modal-section').append('h3').html(_t.html('restore.heading'));
+	    introModal.append('div').attr('class', 'modal-section').append('p').html(_t.html('restore.description'));
+	    var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
+	    var restore = buttonWrap.append('button').attr('class', 'restore').on('click', function () {
+	      context.history().restore();
+	      modalSelection.remove();
+	    });
+	    restore.append('svg').attr('class', 'logo logo-restore').append('use').attr('xlink:href', '#iD-logo-restore');
+	    restore.append('div').html(_t.html('restore.restore'));
+	    var reset = buttonWrap.append('button').attr('class', 'reset').on('click', function () {
+	      context.history().clearSaved();
+	      modalSelection.remove();
+	    });
+	    reset.append('svg').attr('class', 'logo logo-reset').append('use').attr('xlink:href', '#iD-logo-reset');
+	    reset.append('div').html(_t.html('restore.reset'));
+	    restore.node().focus();
+	  };
+	}
 
-	        var linkEnter = container.selectAll('.download-changes')
-	            .data([0])
-	            .enter()
-	            .append('a')
-	            .attr('class', 'download-changes');
-
-	        if (detected.download) {      // All except IE11 and Edge
-	            linkEnter                 // download the data as a file
-	                .attr('href', window.URL.createObjectURL(blob))
-	                .attr('download', fileName);
-
-	        } else {                      // IE11 and Edge
-	            linkEnter                 // open data uri in a new tab
-	                .attr('target', '_blank')
-	                .on('click.download', function() {
-	                    navigator.msSaveBlob(blob, fileName);
-	                });
-	        }
+	function uiScale(context) {
+	  var projection = context.projection,
+	      isImperial = !_mainLocalizer.usesMetric(),
+	      maxLength = 180,
+	      tickHeight = 8;
+
+	  function scaleDefs(loc1, loc2) {
+	    var lat = (loc2[1] + loc1[1]) / 2,
+	        conversion = isImperial ? 3.28084 : 1,
+	        dist = geoLonToMeters(loc2[0] - loc1[0], lat) * conversion,
+	        scale = {
+	      dist: 0,
+	      px: 0,
+	      text: ''
+	    },
+	        buckets,
+	        i,
+	        val,
+	        dLon;
 
-	        linkEnter
-	            .call(svgIcon('#iD-icon-load', 'inline'))
-	            .append('span')
-	            .text(_t('commit.download_changes'));
+	    if (isImperial) {
+	      buckets = [5280000, 528000, 52800, 5280, 500, 50, 5, 1];
+	    } else {
+	      buckets = [5000000, 500000, 50000, 5000, 500, 50, 5, 1];
+	    } // determine a user-friendly endpoint for the scale
 
 
-	        function mouseover(d) {
-	            if (d.entity) {
-	                context.surface().selectAll(
-	                    utilEntityOrMemberSelector([d.entity.id], context.graph())
-	                ).classed('hover', true);
-	            }
-	        }
+	    for (i = 0; i < buckets.length; i++) {
+	      val = buckets[i];
 
+	      if (dist >= val) {
+	        scale.dist = Math.floor(dist / val) * val;
+	        break;
+	      } else {
+	        scale.dist = +dist.toFixed(2);
+	      }
+	    }
 
-	        function mouseout() {
-	            context.surface().selectAll('.hover')
-	                .classed('hover', false);
-	        }
+	    dLon = geoMetersToLon(scale.dist / conversion, lat);
+	    scale.px = Math.round(projection([loc1[0] + dLon, loc1[1]])[0]);
+	    scale.text = displayLength(scale.dist / conversion, isImperial);
+	    return scale;
+	  }
 
+	  function update(selection) {
+	    // choose loc1, loc2 along bottom of viewport (near where the scale will be drawn)
+	    var dims = context.map().dimensions(),
+	        loc1 = projection.invert([0, dims[1]]),
+	        loc2 = projection.invert([maxLength, dims[1]]),
+	        scale = scaleDefs(loc1, loc2);
+	    selection.select('.scale-path').attr('d', 'M0.5,0.5v' + tickHeight + 'h' + scale.px + 'v-' + tickHeight);
+	    selection.select('.scale-text').style(_mainLocalizer.textDirection() === 'ltr' ? 'left' : 'right', scale.px + 16 + 'px').html(scale.text);
+	  }
 
-	        function click(change) {
-	            if (change.changeType !== 'deleted') {
-	                var entity = change.entity;
-	                context.map().zoomToEase(entity);
-	                context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph()))
-	                    .classed('hover', true);
-	            }
-	        }
+	  return function (selection) {
+	    function switchUnits() {
+	      isImperial = !isImperial;
+	      selection.call(update);
 	    }
 
-	    return section;
+	    var scalegroup = selection.append('svg').attr('class', 'scale').on('click', switchUnits).append('g').attr('transform', 'translate(10,11)');
+	    scalegroup.append('path').attr('class', 'scale-path');
+	    selection.append('div').attr('class', 'scale-text');
+	    selection.call(update);
+	    context.map().on('move.scale', function () {
+	      update(selection);
+	    });
+	  };
 	}
 
-	function uiCommitWarnings(context) {
-
-	    function commitWarnings(selection) {
-	        var issuesBySeverity = context.validator()
-	            .getIssuesBySeverity({ what: 'edited', where: 'all', includeDisabledRules: true });
+	function uiShortcuts(context) {
+	  var detected = utilDetect();
+	  var _activeTab = 0;
 
-	        for (var severity in issuesBySeverity) {
-	            var issues = issuesBySeverity[severity];
-	            var section = severity + '-section';
-	            var issueItem = severity + '-item';
+	  var _modalSelection;
 
-	            var container = selection.selectAll('.' + section)
-	                .data(issues.length ? [0] : []);
+	  var _selection = select(null);
 
-	            container.exit()
-	                .remove();
+	  function shortcutsModal(_modalSelection) {
+	    _modalSelection.select('.modal').classed('modal-shortcuts', true);
 
-	            var containerEnter = container.enter()
-	                .append('div')
-	                .attr('class', 'modal-section ' + section + ' fillL2');
+	    var content = _modalSelection.select('.content');
 
-	            containerEnter
-	                .append('h3')
-	                .text(severity === 'warning' ? _t('commit.warnings') : _t('commit.errors'));
+	    content.append('div').attr('class', 'modal-section').append('h3').html(_t.html('shortcuts.title'));
+	    _mainFileFetcher.get('shortcuts').then(function (data) {
+	      content.call(render, data);
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  }
 
-	            containerEnter
-	                .append('ul')
-	                .attr('class', 'changeset-list');
+	  function render(selection, dataShortcuts) {
+	    var wrapper = selection.selectAll('.wrapper').data([0]);
+	    var wrapperEnter = wrapper.enter().append('div').attr('class', 'wrapper modal-section');
+	    var tabsBar = wrapperEnter.append('div').attr('class', 'tabs-bar');
+	    var shortcutsList = wrapperEnter.append('div').attr('class', 'shortcuts-list');
+	    wrapper = wrapper.merge(wrapperEnter);
+	    var tabs = tabsBar.selectAll('.tab').data(dataShortcuts);
+	    var tabsEnter = tabs.enter().append('a').attr('class', 'tab').attr('href', '#').on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      var i = tabs.nodes().indexOf(this);
+	      _activeTab = i;
+	      render(selection, dataShortcuts);
+	    });
+	    tabsEnter.append('span').html(function (d) {
+	      return _t.html(d.text);
+	    }); // Update
 
-	            container = containerEnter
-	                .merge(container);
+	    wrapper.selectAll('.tab').classed('active', function (d, i) {
+	      return i === _activeTab;
+	    });
+	    var shortcuts = shortcutsList.selectAll('.shortcut-tab').data(dataShortcuts);
+	    var shortcutsEnter = shortcuts.enter().append('div').attr('class', function (d) {
+	      return 'shortcut-tab shortcut-tab-' + d.tab;
+	    });
+	    var columnsEnter = shortcutsEnter.selectAll('.shortcut-column').data(function (d) {
+	      return d.columns;
+	    }).enter().append('table').attr('class', 'shortcut-column');
+	    var rowsEnter = columnsEnter.selectAll('.shortcut-row').data(function (d) {
+	      return d.rows;
+	    }).enter().append('tr').attr('class', 'shortcut-row');
+	    var sectionRows = rowsEnter.filter(function (d) {
+	      return !d.shortcuts;
+	    });
+	    sectionRows.append('td');
+	    sectionRows.append('td').attr('class', 'shortcut-section').append('h3').html(function (d) {
+	      return _t.html(d.text);
+	    });
+	    var shortcutRows = rowsEnter.filter(function (d) {
+	      return d.shortcuts;
+	    });
+	    var shortcutKeys = shortcutRows.append('td').attr('class', 'shortcut-keys');
+	    var modifierKeys = shortcutKeys.filter(function (d) {
+	      return d.modifiers;
+	    });
+	    modifierKeys.selectAll('kbd.modifier').data(function (d) {
+	      if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
+	        return ['⌘'];
+	      } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
+	        return [];
+	      } else {
+	        return d.modifiers;
+	      }
+	    }).enter().each(function () {
+	      var selection = select(this);
+	      selection.append('kbd').attr('class', 'modifier').html(function (d) {
+	        return uiCmd.display(d);
+	      });
+	      selection.append('span').html('+');
+	    });
+	    shortcutKeys.selectAll('kbd.shortcut').data(function (d) {
+	      var arr = d.shortcuts;
 
+	      if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
+	        arr = ['Y'];
+	      } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
+	        arr = ['F11'];
+	      } // replace translations
 
-	            var items = container.select('ul').selectAll('li')
-	                .data(issues, function(d) { return d.id; });
 
-	            items.exit()
-	                .remove();
+	      arr = arr.map(function (s) {
+	        return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
+	      });
+	      return utilArrayUniq(arr).map(function (s) {
+	        return {
+	          shortcut: s,
+	          separator: d.separator,
+	          suffix: d.suffix
+	        };
+	      });
+	    }).enter().each(function (d, i, nodes) {
+	      var selection = select(this);
+	      var click = d.shortcut.toLowerCase().match(/(.*).click/);
+
+	      if (click && click[1]) {
+	        // replace "left_click", "right_click" with mouse icon
+	        selection.call(svgIcon('#iD-walkthrough-mouse-' + click[1], 'operation'));
+	      } else if (d.shortcut.toLowerCase() === 'long-press') {
+	        selection.call(svgIcon('#iD-walkthrough-longpress', 'longpress operation'));
+	      } else if (d.shortcut.toLowerCase() === 'tap') {
+	        selection.call(svgIcon('#iD-walkthrough-tap', 'tap operation'));
+	      } else {
+	        selection.append('kbd').attr('class', 'shortcut').html(function (d) {
+	          return d.shortcut;
+	        });
+	      }
 
-	            var itemsEnter = items.enter()
-	                .append('li')
-	                .attr('class', issueItem);
+	      if (i < nodes.length - 1) {
+	        selection.append('span').html(d.separator || "\xA0" + _t.html('shortcuts.or') + "\xA0");
+	      } else if (i === nodes.length - 1 && d.suffix) {
+	        selection.append('span').html(d.suffix);
+	      }
+	    });
+	    shortcutKeys.filter(function (d) {
+	      return d.gesture;
+	    }).each(function () {
+	      var selection = select(this);
+	      selection.append('span').html('+');
+	      selection.append('span').attr('class', 'gesture').html(function (d) {
+	        return _t.html(d.gesture);
+	      });
+	    });
+	    shortcutRows.append('td').attr('class', 'shortcut-desc').html(function (d) {
+	      return d.text ? _t.html(d.text) : "\xA0";
+	    }); // Update
 
-	            itemsEnter
-	                .call(svgIcon('#iD-icon-alert', 'pre-text'));
+	    wrapper.selectAll('.shortcut-tab').style('display', function (d, i) {
+	      return i === _activeTab ? 'flex' : 'none';
+	    });
+	  }
 
-	            itemsEnter
-	                .append('strong')
-	                .attr('class', 'issue-message');
+	  return function (selection, show) {
+	    _selection = selection;
 
-	            itemsEnter.filter(function(d) { return d.tooltip; })
-	                .call(uiTooltip()
-	                    .title(function(d) { return d.tooltip; })
-	                    .placement('top')
-	                );
+	    if (show) {
+	      _modalSelection = uiModal(selection);
 
-	            items = itemsEnter
-	                .merge(items);
+	      _modalSelection.call(shortcutsModal);
+	    } else {
+	      context.keybinding().on([_t('shortcuts.toggle.key'), '?'], function () {
+	        if (context.container().selectAll('.modal-shortcuts').size()) {
+	          // already showing
+	          if (_modalSelection) {
+	            _modalSelection.close();
 
-	            items.selectAll('.issue-message')
-	                .text(function(d) {
-	                    return d.message(context);
-	                });
+	            _modalSelection = null;
+	          }
+	        } else {
+	          _modalSelection = uiModal(_selection);
 
-	            items
-	                .on('mouseover', function(d) {
-	                    if (d.entityIds) {
-	                        context.surface().selectAll(
-	                            utilEntityOrMemberSelector(
-	                                d.entityIds,
-	                                context.graph()
-	                            )
-	                        ).classed('hover', true);
-	                    }
-	                })
-	                .on('mouseout', function() {
-	                    context.surface().selectAll('.hover')
-	                        .classed('hover', false);
-	                })
-	                .on('click', function(d) {
-	                    context.validator().focusIssue(d);
-	                });
+	          _modalSelection.call(shortcutsModal);
 	        }
+	      });
 	    }
+	  };
+	}
 
+	var pair_1 = pair;
 
-	    return commitWarnings;
-	}
+	function search(input, dims) {
+	  if (!dims) dims = 'NSEW';
+	  if (typeof input !== 'string') return null;
+	  input = input.toUpperCase();
+	  var regex = /^[\s\,]*([NSEW])?\s*([\-|\—|\―]?[0-9.]+)[°º˚]?\s*(?:([0-9.]+)['’′‘]\s*)?(?:([0-9.]+)(?:''|"|”|″)\s*)?([NSEW])?/;
+	  var m = input.match(regex);
+	  if (!m) return null; // no match
 
-	var readOnlyTags = [
-	    /^changesets_count$/,
-	    /^created_by$/,
-	    /^ideditor:/,
-	    /^imagery_used$/,
-	    /^host$/,
-	    /^locale$/,
-	    /^warnings:/,
-	    /^resolved:/,
-	    /^closed:note$/,
-	    /^closed:keepright$/,
-	    /^closed:improveosm:/,
-	    /^closed:osmose:/
-	];
+	  var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing
 
-	// treat most punctuation (except -, _, +, &) as hashtag delimiters - #4398
-	// from https://stackoverflow.com/a/25575009
-	var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
+	  var dim;
 
+	  if (m[1] && m[5]) {
+	    // if matched both..
+	    dim = m[1]; // keep leading
+
+	    matched = matched.slice(0, -1); // remove trailing dimension from match
+	  } else {
+	    dim = m[1] || m[5];
+	  } // if unrecognized dimension
 
-	function uiCommit(context) {
-	    var dispatch$1 = dispatch('cancel');
-	    var _userDetails;
-	    var _selection;
 
-	    var changesetEditor = uiChangesetEditor(context)
-	        .on('change', changeTags);
-	    var rawTagEditor = uiSectionRawTagEditor('changeset-tag-editor', context)
-	        .on('change', changeTags)
-	        .readOnlyTags(readOnlyTags);
-	    var commitChanges = uiSectionChanges(context);
-	    var commitWarnings = uiCommitWarnings(context);
+	  if (dim && dims.indexOf(dim) === -1) return null; // extract DMS
 
+	  var deg = m[2] ? parseFloat(m[2]) : 0;
+	  var min = m[3] ? parseFloat(m[3]) / 60 : 0;
+	  var sec = m[4] ? parseFloat(m[4]) / 3600 : 0;
+	  var sign = deg < 0 ? -1 : 1;
+	  if (dim === 'S' || dim === 'W') sign *= -1;
+	  return {
+	    val: (Math.abs(deg) + min + sec) * sign,
+	    dim: dim,
+	    matched: matched,
+	    remain: input.slice(matched.length)
+	  };
+	}
 
-	    function commit(selection) {
-	        _selection = selection;
+	function pair(input, dims) {
+	  input = input.trim();
+	  var one = search(input, dims);
+	  if (!one) return null;
+	  input = one.remain.trim();
+	  var two = search(input, dims);
+	  if (!two || two.remain) return null;
 
-	        // Initialize changeset if one does not exist yet.
-	        if (!context.changeset) { initChangeset(); }
+	  if (one.dim) {
+	    return swapdim(one.val, two.val, one.dim);
+	  } else {
+	    return [one.val, two.val];
+	  }
+	}
 
-	        loadDerivedChangesetTags();
+	function swapdim(a, b, dim) {
+	  if (dim === 'N' || dim === 'S') return [a, b];
+	  if (dim === 'W' || dim === 'E') return [b, a];
+	}
 
-	        selection.call(render);
+	function uiFeatureList(context) {
+	  var _geocodeResults;
+
+	  function featureList(selection) {
+	    var header = selection.append('div').attr('class', 'header fillL');
+	    header.append('h3').html(_t.html('inspector.feature_list'));
+	    var searchWrap = selection.append('div').attr('class', 'search-header');
+	    searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
+	    var search = searchWrap.append('input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keypress', keypress).on('keydown', keydown).on('input', inputevent);
+	    var listWrap = selection.append('div').attr('class', 'inspector-body');
+	    var list = listWrap.append('div').attr('class', 'feature-list');
+	    context.on('exit.feature-list', clearSearch);
+	    context.map().on('drawn.feature-list', mapDrawn);
+	    context.keybinding().on(uiCmd('⌘F'), focusSearch);
+
+	    function focusSearch(d3_event) {
+	      var mode = context.mode() && context.mode().id;
+	      if (mode !== 'browse') return;
+	      d3_event.preventDefault();
+	      search.node().focus();
+	    }
+
+	    function keydown(d3_event) {
+	      if (d3_event.keyCode === 27) {
+	        // escape
+	        search.node().blur();
+	      }
 	    }
 
-	    function initChangeset() {
+	    function keypress(d3_event) {
+	      var q = search.property('value'),
+	          items = list.selectAll('.feature-list-item');
 
-	        // expire stored comment, hashtags, source after cutoff datetime - #3947 #4899
-	        var commentDate = +corePreferences('commentDate') || 0;
-	        var currDate = Date.now();
-	        var cutoff = 2 * 86400 * 1000;   // 2 days
-	        if (commentDate > currDate || currDate - commentDate > cutoff) {
-	            corePreferences('comment', null);
-	            corePreferences('hashtags', null);
-	            corePreferences('source', null);
-	        }
+	      if (d3_event.keyCode === 13 && // ↩ Return
+	      q.length && items.size()) {
+	        click(items.datum());
+	      }
+	    }
 
-	        // load in explicitly-set values, if any
-	        if (context.defaultChangesetComment()) {
-	            corePreferences('comment', context.defaultChangesetComment());
-	            corePreferences('commentDate', Date.now());
-	        }
-	        if (context.defaultChangesetSource()) {
-	            corePreferences('source', context.defaultChangesetSource());
-	            corePreferences('commentDate', Date.now());
-	        }
-	        if (context.defaultChangesetHashtags()) {
-	            corePreferences('hashtags', context.defaultChangesetHashtags());
-	            corePreferences('commentDate', Date.now());
-	        }
+	    function inputevent() {
+	      _geocodeResults = undefined;
+	      drawList();
+	    }
 
-	        var detected = utilDetect();
-	        var tags = {
-	            comment: corePreferences('comment') || '',
-	            created_by: context.cleanTagValue('iD ' + context.version),
-	            host: context.cleanTagValue(detected.host),
-	            locale: context.cleanTagValue(_mainLocalizer.localeCode())
-	        };
+	    function clearSearch() {
+	      search.property('value', '');
+	      drawList();
+	    }
 
-	        // call findHashtags initially - this will remove stored
-	        // hashtags if any hashtags are found in the comment - #4304
-	        findHashtags(tags, true);
+	    function mapDrawn(e) {
+	      if (e.full) {
+	        drawList();
+	      }
+	    }
 
-	        var hashtags = corePreferences('hashtags');
-	        if (hashtags) {
-	            tags.hashtags = hashtags;
-	        }
+	    function features() {
+	      var result = [];
+	      var graph = context.graph();
+	      var visibleCenter = context.map().extent().center();
+	      var q = search.property('value').toLowerCase();
+	      if (!q) return result;
+	      var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);
+
+	      if (locationMatch) {
+	        var loc = [parseFloat(locationMatch[0]), parseFloat(locationMatch[1])];
+	        result.push({
+	          id: -1,
+	          geometry: 'point',
+	          type: _t('inspector.location'),
+	          name: dmsCoordinatePair([loc[1], loc[0]]),
+	          location: loc
+	        });
+	      } // A location search takes priority over an ID search
 
-	        var source = corePreferences('source');
-	        if (source) {
-	            tags.source = source;
-	        }
-	        var photoOverlaysUsed = context.history().photoOverlaysUsed();
-	        if (photoOverlaysUsed.length) {
-	            var sources = (tags.source || '').split(';');
 
-	            // include this tag for any photo layer
-	            if (sources.indexOf('streetlevel imagery') === -1) {
-	                sources.push('streetlevel imagery');
-	            }
+	      var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
 
-	            // add the photo overlays used during editing as sources
-	            photoOverlaysUsed.forEach(function(photoOverlay) {
-	                if (sources.indexOf(photoOverlay) === -1) {
-	                    sources.push(photoOverlay);
-	                }
-	            });
+	      if (idMatch) {
+	        var elemType = idMatch[1].charAt(0);
+	        var elemId = idMatch[2];
+	        result.push({
+	          id: elemType + elemId,
+	          geometry: elemType === 'n' ? 'point' : elemType === 'w' ? 'line' : 'relation',
+	          type: elemType === 'n' ? _t('inspector.node') : elemType === 'w' ? _t('inspector.way') : _t('inspector.relation'),
+	          name: elemId
+	        });
+	      }
 
-	            tags.source = context.cleanTagValue(sources.join(';'));
-	        }
+	      var allEntities = graph.entities;
+	      var localResults = [];
 
-	        context.changeset = new osmChangeset({ tags: tags });
-	    }
+	      for (var id in allEntities) {
+	        var entity = allEntities[id];
+	        if (!entity) continue;
+	        var name = utilDisplayName(entity) || '';
+	        if (name.toLowerCase().indexOf(q) < 0) continue;
+	        var matched = _mainPresetIndex.match(entity, graph);
+	        var type = matched && matched.name() || utilDisplayType(entity.id);
+	        var extent = entity.extent(graph);
+	        var distance = extent ? geoSphericalDistance(visibleCenter, extent.center()) : 0;
+	        localResults.push({
+	          id: entity.id,
+	          entity: entity,
+	          geometry: entity.geometry(graph),
+	          type: type,
+	          name: name,
+	          distance: distance
+	        });
+	        if (localResults.length > 100) break;
+	      }
 
-	    // Calculates read-only metadata tags based on the user's editing session and applies
-	    // them to the changeset.
-	    function loadDerivedChangesetTags() {
+	      localResults = localResults.sort(function byDistance(a, b) {
+	        return a.distance - b.distance;
+	      });
+	      result = result.concat(localResults);
+
+	      (_geocodeResults || []).forEach(function (d) {
+	        if (d.osm_type && d.osm_id) {
+	          // some results may be missing these - #1890
+	          // Make a temporary osmEntity so we can preset match
+	          // and better localize the search result - #4725
+	          var id = osmEntity.id.fromOSM(d.osm_type, d.osm_id);
+	          var tags = {};
+	          tags[d["class"]] = d.type;
+	          var attrs = {
+	            id: id,
+	            type: d.osm_type,
+	            tags: tags
+	          };
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	          if (d.osm_type === 'way') {
+	            // for ways, add some fake closed nodes
+	            attrs.nodes = ['a', 'a']; // so that geometry area is possible
+	          }
 
-	        var tags = Object.assign({}, context.changeset.tags);   // shallow copy
+	          var tempEntity = osmEntity(attrs);
+	          var tempGraph = coreGraph([tempEntity]);
+	          var matched = _mainPresetIndex.match(tempEntity, tempGraph);
+	          var type = matched && matched.name() || utilDisplayType(id);
+	          result.push({
+	            id: tempEntity.id,
+	            geometry: tempEntity.geometry(tempGraph),
+	            type: type,
+	            name: d.display_name,
+	            extent: new geoExtent([parseFloat(d.boundingbox[3]), parseFloat(d.boundingbox[0])], [parseFloat(d.boundingbox[2]), parseFloat(d.boundingbox[1])])
+	          });
+	        }
+	      });
 
-	        // assign tags for imagery used
-	        var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
-	        tags.imagery_used = imageryUsed || 'None';
+	      if (q.match(/^[0-9]+$/)) {
+	        // if query is just a number, possibly an OSM ID without a prefix
+	        result.push({
+	          id: 'n' + q,
+	          geometry: 'point',
+	          type: _t('inspector.node'),
+	          name: q
+	        });
+	        result.push({
+	          id: 'w' + q,
+	          geometry: 'line',
+	          type: _t('inspector.way'),
+	          name: q
+	        });
+	        result.push({
+	          id: 'r' + q,
+	          geometry: 'relation',
+	          type: _t('inspector.relation'),
+	          name: q
+	        });
+	      }
 
-	        // assign tags for closed issues and notes
-	        var osmClosed = osm.getClosedIDs();
-	        var itemType;
-	        if (osmClosed.length) {
-	            tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
-	        }
-	        if (services.keepRight) {
-	            var krClosed = services.keepRight.getClosedIDs();
-	            if (krClosed.length) {
-	                tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
-	            }
-	        }
-	        if (services.improveOSM) {
-	            var iOsmClosed = services.improveOSM.getClosedCounts();
-	            for (itemType in iOsmClosed) {
-	                tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
-	            }
-	        }
-	        if (services.osmose) {
-	            var osmoseClosed = services.osmose.getClosedCounts();
-	            for (itemType in osmoseClosed) {
-	                tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
-	            }
-	        }
+	      return result;
+	    }
 
-	        // remove existing issue counts
-	        for (var key in tags) {
-	            if (key.match(/(^warnings:)|(^resolved:)/)) {
-	                delete tags[key];
-	            }
-	        }
+	    function drawList() {
+	      var value = search.property('value');
+	      var results = features();
+	      list.classed('filtered', value.length);
+	      var resultsIndicator = list.selectAll('.no-results-item').data([0]).enter().append('button').property('disabled', true).attr('class', 'no-results-item').call(svgIcon('#iD-icon-alert', 'pre-text'));
+	      resultsIndicator.append('span').attr('class', 'entity-name');
+	      list.selectAll('.no-results-item .entity-name').html(_t.html('geocoder.no_results_worldwide'));
 
-	        function addIssueCounts(issues, prefix) {
-	            var issuesByType = utilArrayGroupBy(issues, 'type');
-	            for (var issueType in issuesByType) {
-	                var issuesOfType = issuesByType[issueType];
-	                if (issuesOfType[0].subtype) {
-	                    var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
-	                    for (var issueSubtype in issuesBySubtype) {
-	                        var issuesOfSubtype = issuesBySubtype[issueSubtype];
-	                        tags[prefix + ':' + issueType + ':' + issueSubtype] = context.cleanTagValue(issuesOfSubtype.length.toString());
-	                    }
-	                } else {
-	                    tags[prefix + ':' + issueType] = context.cleanTagValue(issuesOfType.length.toString());
-	                }
-	            }
-	        }
+	      if (services.geocoder) {
+	        list.selectAll('.geocode-item').data([0]).enter().append('button').attr('class', 'geocode-item secondary-action').on('click', geocoderSearch).append('div').attr('class', 'label').append('span').attr('class', 'entity-name').html(_t.html('geocoder.search'));
+	      }
 
-	        // add counts of warnings generated by the user's edits
-	        var warnings = context.validator()
-	            .getIssuesBySeverity({ what: 'edited', where: 'all', includeIgnored: true, includeDisabledRules: true }).warning;
-	        addIssueCounts(warnings, 'warnings');
+	      list.selectAll('.no-results-item').style('display', value.length && !results.length ? 'block' : 'none');
+	      list.selectAll('.geocode-item').style('display', value && _geocodeResults === undefined ? 'block' : 'none');
+	      list.selectAll('.feature-list-item').data([-1]).remove();
+	      var items = list.selectAll('.feature-list-item').data(results, function (d) {
+	        return d.id;
+	      });
+	      var enter = items.enter().insert('button', '.geocode-item').attr('class', 'feature-list-item').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
+	      var label = enter.append('div').attr('class', 'label');
+	      label.each(function (d) {
+	        select(this).call(svgIcon('#iD-icon-' + d.geometry, 'pre-text'));
+	      });
+	      label.append('span').attr('class', 'entity-type').html(function (d) {
+	        return d.type;
+	      });
+	      label.append('span').attr('class', 'entity-name').html(function (d) {
+	        return d.name;
+	      });
+	      enter.style('opacity', 0).transition().style('opacity', 1);
+	      items.order();
+	      items.exit().remove();
+	    }
 
-	        // add counts of issues resolved by the user's edits
-	        var resolvedIssues = context.validator().getResolvedIssues();
-	        addIssueCounts(resolvedIssues, 'resolved');
+	    function mouseover(d3_event, d) {
+	      if (d.id === -1) return;
+	      utilHighlightEntities([d.id], true, context);
+	    }
 
-	        context.changeset = context.changeset.update({ tags: tags });
+	    function mouseout(d3_event, d) {
+	      if (d.id === -1) return;
+	      utilHighlightEntities([d.id], false, context);
 	    }
 
-	    function render(selection) {
+	    function click(d3_event, d) {
+	      d3_event.preventDefault();
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	      if (d.location) {
+	        context.map().centerZoomEase([d.location[1], d.location[0]], 19);
+	      } else if (d.entity) {
+	        utilHighlightEntities([d.id], false, context);
+	        context.enter(modeSelect(context, [d.entity.id]));
+	        context.map().zoomToEase(d.entity);
+	      } else {
+	        // download, zoom to, and select the entity with the given ID
+	        context.zoomToEntity(d.id);
+	      }
+	    }
 
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	    function geocoderSearch() {
+	      services.geocoder.search(search.property('value'), function (err, resp) {
+	        _geocodeResults = resp || [];
+	        drawList();
+	      });
+	    }
+	  }
 
-	        var headerTitle = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL header-container');
+	  return featureList;
+	}
 
-	        headerTitle
-	            .append('div')
-	            .attr('class', 'header-block header-block-outer');
+	function uiSectionEntityIssues(context) {
+	  var _entityIDs = [];
+	  var _issues = [];
 
-	        headerTitle
-	            .append('div')
-	            .attr('class', 'header-block')
-	            .append('h3')
-	            .text(_t('commit.title'));
+	  var _activeIssueID;
 
-	        headerTitle
-	            .append('div')
-	            .attr('class', 'header-block header-block-outer header-block-close')
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() {
-	                dispatch$1.call('cancel', this);
-	            })
-	            .call(svgIcon('#iD-icon-close'));
-
-	        var body = selection.selectAll('.body')
-	            .data([0]);
-
-	        body = body.enter()
-	            .append('div')
-	            .attr('class', 'body')
-	            .merge(body);
+	  var section = uiSection('entity-issues', context).shouldDisplay(function () {
+	    return _issues.length > 0;
+	  }).label(function () {
+	    return _t('inspector.title_count', {
+	      title: _t.html('issues.list_title'),
+	      count: _issues.length
+	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  context.validator().on('validated.entity_issues', function () {
+	    // Refresh on validated events
+	    reloadIssues();
+	    section.reRender();
+	  }).on('focusedIssue.entity_issues', function (issue) {
+	    makeActiveIssue(issue.id);
+	  });
 
+	  function reloadIssues() {
+	    _issues = context.validator().getSharedEntityIssues(_entityIDs, {
+	      includeDisabledRules: true
+	    });
+	  }
 
-	        // Changeset Section
-	        var changesetSection = body.selectAll('.changeset-editor')
-	            .data([0]);
+	  function makeActiveIssue(issueID) {
+	    _activeIssueID = issueID;
+	    section.selection().selectAll('.issue-container').classed('active', function (d) {
+	      return d.id === _activeIssueID;
+	    });
+	  }
 
-	        changesetSection = changesetSection.enter()
-	            .append('div')
-	            .attr('class', 'modal-section changeset-editor')
-	            .merge(changesetSection);
+	  function renderDisclosureContent(selection) {
+	    selection.classed('grouped-items-area', true);
+	    _activeIssueID = _issues.length > 0 ? _issues[0].id : null;
+	    var containers = selection.selectAll('.issue-container').data(_issues, function (d) {
+	      return d.id;
+	    }); // Exit
 
-	        changesetSection
-	            .call(changesetEditor
-	                .changesetID(context.changeset.id)
-	                .tags(context.changeset.tags)
-	            );
+	    containers.exit().remove(); // Enter
 
+	    var containersEnter = containers.enter().append('div').attr('class', 'issue-container');
+	    var itemsEnter = containersEnter.append('div').attr('class', function (d) {
+	      return 'issue severity-' + d.severity;
+	    }).on('mouseover.highlight', function (d3_event, d) {
+	      // don't hover-highlight the selected entity
+	      var ids = d.entityIds.filter(function (e) {
+	        return _entityIDs.indexOf(e) === -1;
+	      });
+	      utilHighlightEntities(ids, true, context);
+	    }).on('mouseout.highlight', function (d3_event, d) {
+	      var ids = d.entityIds.filter(function (e) {
+	        return _entityIDs.indexOf(e) === -1;
+	      });
+	      utilHighlightEntities(ids, false, context);
+	    });
+	    var labelsEnter = itemsEnter.append('div').attr('class', 'issue-label');
+	    var textEnter = labelsEnter.append('button').attr('class', 'issue-text').on('click', function (d3_event, d) {
+	      makeActiveIssue(d.id); // expand only the clicked item
 
-	        // Warnings
-	        body.call(commitWarnings);
+	      var extent = d.extent(context.graph());
 
+	      if (extent) {
+	        var setZoom = Math.max(context.map().zoom(), 19);
+	        context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
+	      }
+	    });
+	    textEnter.each(function (d) {
+	      var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
+	      select(this).call(svgIcon(iconName, 'issue-icon'));
+	    });
+	    textEnter.append('span').attr('class', 'issue-message');
+	    var infoButton = labelsEnter.append('button').attr('class', 'issue-info-button').attr('title', _t('icons.information')).call(svgIcon('#iD-icon-inspect'));
+	    infoButton.on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      this.blur(); // avoid keeping focus on the button - #4641
+
+	      var container = select(this.parentNode.parentNode.parentNode);
+	      var info = container.selectAll('.issue-info');
+	      var isExpanded = info.classed('expanded');
+
+	      if (isExpanded) {
+	        info.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+	          info.classed('expanded', false);
+	        });
+	      } else {
+	        info.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1').on('end', function () {
+	          info.style('max-height', null);
+	        });
+	      }
+	    });
+	    itemsEnter.append('ul').attr('class', 'issue-fix-list');
+	    containersEnter.append('div').attr('class', 'issue-info').style('max-height', '0').style('opacity', '0').each(function (d) {
+	      if (typeof d.reference === 'function') {
+	        select(this).call(d.reference);
+	      } else {
+	        select(this).html(_t.html('inspector.no_documentation_key'));
+	      }
+	    }); // Update
 
-	        // Upload Explanation
-	        var saveSection = body.selectAll('.save-section')
-	            .data([0]);
+	    containers = containers.merge(containersEnter).classed('active', function (d) {
+	      return d.id === _activeIssueID;
+	    });
+	    containers.selectAll('.issue-message').html(function (d) {
+	      return d.message(context);
+	    }); // fixes
+
+	    var fixLists = containers.selectAll('.issue-fix-list');
+	    var fixes = fixLists.selectAll('.issue-fix-item').data(function (d) {
+	      return d.fixes ? d.fixes(context) : [];
+	    }, function (fix) {
+	      return fix.id;
+	    });
+	    fixes.exit().remove();
+	    var fixesEnter = fixes.enter().append('li').attr('class', 'issue-fix-item');
+	    var buttons = fixesEnter.append('button').on('click', function (d3_event, d) {
+	      // not all fixes are actionable
+	      if (select(this).attr('disabled') || !d.onClick) return; // Don't run another fix for this issue within a second of running one
+	      // (Necessary for "Select a feature type" fix. Most fixes should only ever run once)
+
+	      if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) return;
+	      d.issue.dateLastRanFix = new Date(); // remove hover-highlighting
+
+	      utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
+	      new Promise(function (resolve, reject) {
+	        d.onClick(context, resolve, reject);
+
+	        if (d.onClick.length <= 1) {
+	          // if the fix doesn't take any completion parameters then consider it resolved
+	          resolve();
+	        }
+	      }).then(function () {
+	        // revalidate whenever the fix has finished running successfully
+	        context.validator().validate();
+	      });
+	    }).on('mouseover.highlight', function (d3_event, d) {
+	      utilHighlightEntities(d.entityIds, true, context);
+	    }).on('mouseout.highlight', function (d3_event, d) {
+	      utilHighlightEntities(d.entityIds, false, context);
+	    });
+	    buttons.each(function (d) {
+	      var iconName = d.icon || 'iD-icon-wrench';
 
-	        saveSection = saveSection.enter()
-	            .append('div')
-	            .attr('class','modal-section save-section fillL')
-	            .merge(saveSection);
+	      if (iconName.startsWith('maki')) {
+	        iconName += '-15';
+	      }
 
-	        var prose = saveSection.selectAll('.commit-info')
-	            .data([0]);
+	      select(this).call(svgIcon('#' + iconName, 'fix-icon'));
+	    });
+	    buttons.append('span').attr('class', 'fix-message').html(function (d) {
+	      return d.title;
+	    });
+	    fixesEnter.merge(fixes).selectAll('button').classed('actionable', function (d) {
+	      return d.onClick;
+	    }).attr('disabled', function (d) {
+	      return d.onClick ? null : 'true';
+	    }).attr('title', function (d) {
+	      if (d.disabledReason) {
+	        return d.disabledReason;
+	      }
 
-	        if (prose.enter().size()) {   // first time, make sure to update user details in prose
-	            _userDetails = null;
-	        }
+	      return null;
+	    });
+	  }
 
-	        prose = prose.enter()
-	            .append('p')
-	            .attr('class', 'commit-info')
-	            .text(_t('commit.upload_explanation'))
-	            .merge(prose);
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	        // always check if this has changed, but only update prose.html()
-	        // if needed, because it can trigger a style recalculation
-	        osm.userDetails(function(err, user) {
-	            if (err) { return; }
+	    if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _activeIssueID = null;
+	      reloadIssues();
+	    }
 
-	            if (_userDetails === user) { return; }  // no change
-	            _userDetails = user;
+	    return section;
+	  };
 
-	            var userLink = select(document.createElement('div'));
+	  return section;
+	}
 
-	            if (user.image_url) {
-	                userLink
-	                    .append('img')
-	                    .attr('src', user.image_url)
-	                    .attr('class', 'icon pre-text user-icon');
-	            }
+	function uiPresetIcon() {
+	  var _preset;
 
-	            userLink
-	                .append('a')
-	                .attr('class', 'user-info')
-	                .text(user.display_name)
-	                .attr('href', osm.userURL(user.display_name))
-	                .attr('target', '_blank');
+	  var _geometry;
 
-	            prose
-	                .html(_t('commit.upload_explanation_with_user', { user: userLink.html() }));
-	        });
+	  var _sizeClass = 'medium';
 
+	  function isSmall() {
+	    return _sizeClass === 'small';
+	  }
 
-	        // Request Review
-	        var requestReview = saveSection.selectAll('.request-review')
-	            .data([0]);
+	  function presetIcon(selection) {
+	    selection.each(render);
+	  }
 
-	        // Enter
-	        var requestReviewEnter = requestReview.enter()
-	            .append('div')
-	            .attr('class', 'request-review');
+	  function getIcon(p, geom) {
+	    if (isSmall() && p.isFallback && p.isFallback()) return 'iD-icon-' + p.id;else if (p.icon) return p.icon;else if (geom === 'line') return 'iD-other-line';else if (geom === 'vertex') return p.isFallback() ? '' : 'temaki-vertex';else if (isSmall() && geom === 'point') return '';else return 'maki-marker-stroked';
+	  }
 
-	        var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
+	  function renderPointBorder(container, drawPoint) {
+	    var pointBorder = container.selectAll('.preset-icon-point-border').data(drawPoint ? [0] : []);
+	    pointBorder.exit().remove();
+	    var pointBorderEnter = pointBorder.enter();
+	    var w = 40;
+	    var h = 40;
+	    pointBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-point-border').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('path').attr('transform', 'translate(11.5, 8)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+	    pointBorder = pointBorderEnter.merge(pointBorder);
+	  }
 
-	        var labelEnter = requestReviewEnter
-	            .append('label')
-	            .attr('for', requestReviewDomId);
+	  function renderCircleFill(container, drawVertex) {
+	    var vertexFill = container.selectAll('.preset-icon-fill-vertex').data(drawVertex ? [0] : []);
+	    vertexFill.exit().remove();
+	    var vertexFillEnter = vertexFill.enter();
+	    var w = 60;
+	    var h = 60;
+	    var d = 40;
+	    vertexFillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-vertex').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('circle').attr('cx', w / 2).attr('cy', h / 2).attr('r', d / 2);
+	    vertexFill = vertexFillEnter.merge(vertexFill);
+	  }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .attr('id', requestReviewDomId);
+	  function renderSquareFill(container, drawArea, tagClasses) {
+	    var fill = container.selectAll('.preset-icon-fill-area').data(drawArea ? [0] : []);
+	    fill.exit().remove();
+	    var fillEnter = fill.enter();
+	    var d = isSmall() ? 40 : 60;
+	    var w = d;
+	    var h = d;
+	    var l = d * 2 / 3;
+	    var c1 = (w - l) / 2;
+	    var c2 = c1 + l;
+	    fillEnter = fillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-area').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
+	    ['fill', 'stroke'].forEach(function (klass) {
+	      fillEnter.append('path').attr('d', "M".concat(c1, " ").concat(c1, " L").concat(c1, " ").concat(c2, " L").concat(c2, " ").concat(c2, " L").concat(c2, " ").concat(c1, " Z")).attr('class', "line area ".concat(klass));
+	    });
+	    var rVertex = 2.5;
+	    [[c1, c1], [c1, c2], [c2, c2], [c2, c1]].forEach(function (point) {
+	      fillEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', rVertex);
+	    });
 
-	        labelEnter
-	            .append('span')
-	            .text(_t('commit.request_review'));
+	    if (!isSmall()) {
+	      var rMidpoint = 1.25;
+	      [[c1, w / 2], [c2, w / 2], [h / 2, c1], [h / 2, c2]].forEach(function (point) {
+	        fillEnter.append('circle').attr('class', 'midpoint').attr('cx', point[0]).attr('cy', point[1]).attr('r', rMidpoint);
+	      });
+	    }
 
-	        // Update
-	        requestReview = requestReview
-	            .merge(requestReviewEnter);
+	    fill = fillEnter.merge(fill);
+	    fill.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
+	    fill.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
+	  }
 
-	        var requestReviewInput = requestReview.selectAll('input')
-	            .property('checked', isReviewRequested(context.changeset.tags))
-	            .on('change', toggleRequestReview);
+	  function renderLine(container, drawLine, tagClasses) {
+	    var line = container.selectAll('.preset-icon-line').data(drawLine ? [0] : []);
+	    line.exit().remove();
+	    var lineEnter = line.enter();
+	    var d = isSmall() ? 40 : 60; // draw the line parametrically
 
+	    var w = d;
+	    var h = d;
+	    var y = Math.round(d * 0.72);
+	    var l = Math.round(d * 0.6);
+	    var r = 2.5;
+	    var x1 = (w - l) / 2;
+	    var x2 = x1 + l;
+	    lineEnter = lineEnter.append('svg').attr('class', 'preset-icon-line').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
+	    ['casing', 'stroke'].forEach(function (klass) {
+	      lineEnter.append('path').attr('d', "M".concat(x1, " ").concat(y, " L").concat(x2, " ").concat(y)).attr('class', "line ".concat(klass));
+	    });
+	    [[x1 - 1, y], [x2 + 1, y]].forEach(function (point) {
+	      lineEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
+	    });
+	    line = lineEnter.merge(line);
+	    line.selectAll('path.stroke').attr('class', "line stroke ".concat(tagClasses));
+	    line.selectAll('path.casing').attr('class', "line casing ".concat(tagClasses));
+	  }
 
-	        // Buttons
-	        var buttonSection = saveSection.selectAll('.buttons')
-	            .data([0]);
+	  function renderRoute(container, drawRoute, p) {
+	    var route = container.selectAll('.preset-icon-route').data(drawRoute ? [0] : []);
+	    route.exit().remove();
+	    var routeEnter = route.enter();
+	    var d = isSmall() ? 40 : 60; // draw the route parametrically
 
-	        // enter
-	        var buttonEnter = buttonSection.enter()
-	            .append('div')
-	            .attr('class', 'buttons fillL');
+	    var w = d;
+	    var h = d;
+	    var y1 = Math.round(d * 0.80);
+	    var y2 = Math.round(d * 0.68);
+	    var l = Math.round(d * 0.6);
+	    var r = 2;
+	    var x1 = (w - l) / 2;
+	    var x2 = x1 + l / 3;
+	    var x3 = x2 + l / 3;
+	    var x4 = x3 + l / 3;
+	    routeEnter = routeEnter.append('svg').attr('class', 'preset-icon-route').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
+	    ['casing', 'stroke'].forEach(function (klass) {
+	      routeEnter.append('path').attr('d', "M".concat(x1, " ").concat(y1, " L").concat(x2, " ").concat(y2)).attr('class', "segment0 line ".concat(klass));
+	      routeEnter.append('path').attr('d', "M".concat(x2, " ").concat(y2, " L").concat(x3, " ").concat(y1)).attr('class', "segment1 line ".concat(klass));
+	      routeEnter.append('path').attr('d', "M".concat(x3, " ").concat(y1, " L").concat(x4, " ").concat(y2)).attr('class', "segment2 line ".concat(klass));
+	    });
+	    [[x1, y1], [x2, y2], [x3, y1], [x4, y2]].forEach(function (point) {
+	      routeEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
+	    });
+	    route = routeEnter.merge(route);
 
-	        buttonEnter
-	            .append('button')
-	            .attr('class', 'secondary-action button cancel-button')
-	            .append('span')
-	            .attr('class', 'label')
-	            .text(_t('commit.cancel'));
+	    if (drawRoute) {
+	      var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
+	      var segmentPresetIDs = routeSegments[routeType];
 
-	        var uploadButton = buttonEnter
-	            .append('button')
-	            .attr('class', 'action button save-button');
+	      for (var i in segmentPresetIDs) {
+	        var segmentPreset = _mainPresetIndex.item(segmentPresetIDs[i]);
+	        var segmentTagClasses = svgTagClasses().getClassesString(segmentPreset.tags, '');
+	        route.selectAll("path.stroke.segment".concat(i)).attr('class', "segment".concat(i, " line stroke ").concat(segmentTagClasses));
+	        route.selectAll("path.casing.segment".concat(i)).attr('class', "segment".concat(i, " line casing ").concat(segmentTagClasses));
+	      }
+	    }
+	  } // Route icons are drawn with a zigzag annotation underneath:
+	  //     o   o
+	  //    / \ /
+	  //   o   o
+	  // This dataset defines the styles that are used to draw the zigzag segments.
 
-	        uploadButton.append('span')
-	            .attr('class', 'label')
-	            .text(_t('commit.save'));
 
-	        var uploadBlockerTooltipText = getUploadBlockerMessage();
+	  var routeSegments = {
+	    bicycle: ['highway/cycleway', 'highway/cycleway', 'highway/cycleway'],
+	    bus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
+	    trolleybus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
+	    detour: ['highway/tertiary', 'highway/residential', 'highway/unclassified'],
+	    ferry: ['route/ferry', 'route/ferry', 'route/ferry'],
+	    foot: ['highway/footway', 'highway/footway', 'highway/footway'],
+	    hiking: ['highway/path', 'highway/path', 'highway/path'],
+	    horse: ['highway/bridleway', 'highway/bridleway', 'highway/bridleway'],
+	    light_rail: ['railway/light_rail', 'railway/light_rail', 'railway/light_rail'],
+	    monorail: ['railway/monorail', 'railway/monorail', 'railway/monorail'],
+	    pipeline: ['man_made/pipeline', 'man_made/pipeline', 'man_made/pipeline'],
+	    piste: ['piste/downhill', 'piste/hike', 'piste/nordic'],
+	    power: ['power/line', 'power/line', 'power/line'],
+	    road: ['highway/secondary', 'highway/primary', 'highway/trunk'],
+	    subway: ['railway/subway', 'railway/subway', 'railway/subway'],
+	    train: ['railway/rail', 'railway/rail', 'railway/rail'],
+	    tram: ['railway/tram', 'railway/tram', 'railway/tram'],
+	    waterway: ['waterway/stream', 'waterway/stream', 'waterway/stream']
+	  };
 
-	        // update
-	        buttonSection = buttonSection
-	            .merge(buttonEnter);
+	  function render() {
+	    var p = _preset.apply(this, arguments);
 
-	        buttonSection.selectAll('.cancel-button')
-	            .on('click.cancel', function() {
-	                dispatch$1.call('cancel', this);
-	            });
+	    var geom = _geometry ? _geometry.apply(this, arguments) : null;
 
-	        buttonSection.selectAll('.save-button')
-	            .classed('disabled', uploadBlockerTooltipText !== null)
-	            .on('click.save', function() {
-	                if (!select(this).classed('disabled')) {
-	                    this.blur();    // avoid keeping focus on the button - #4641
-	                    context.uploader().save(context.changeset);
-	                }
-	            });
+	    if (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
+	      geom = 'route';
+	    }
 
-	        // remove any existing tooltip
-	        uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
+	    var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+	    var isFallback = isSmall() && p.isFallback && p.isFallback();
+	    var imageURL = showThirdPartyIcons === 'true' && p.imageURL;
+	    var picon = getIcon(p, geom);
+	    var isMaki = picon && /^maki-/.test(picon);
+	    var isTemaki = picon && /^temaki-/.test(picon);
+	    var isFa = picon && /^fa[srb]-/.test(picon);
+	    var isiDIcon = picon && !(isMaki || isTemaki || isFa);
+	    var isCategory = !p.setTags;
+	    var drawPoint = picon && geom === 'point' && isSmall() && !isFallback;
+	    var drawVertex = picon !== null && geom === 'vertex' && (!isSmall() || !isFallback);
+	    var drawLine = picon && geom === 'line' && !isFallback && !isCategory;
+	    var drawArea = picon && geom === 'area' && !isFallback;
+	    var drawRoute = picon && geom === 'route';
+	    var isFramed = drawVertex || drawArea || drawLine || drawRoute;
+	    var tags = !isCategory ? p.setTags({}, geom) : {};
 
-	        if (uploadBlockerTooltipText) {
-	            buttonSection.selectAll('.save-button')
-	                .call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
-	        }
+	    for (var k in tags) {
+	      if (tags[k] === '*') {
+	        tags[k] = 'yes';
+	      }
+	    }
 
-	        // Raw Tag Editor
-	        var tagSection = body.selectAll('.tag-section.raw-tag-editor')
-	            .data([0]);
+	    var tagClasses = svgTagClasses().getClassesString(tags, '');
+	    var selection = select(this);
+	    var container = selection.selectAll('.preset-icon-container').data([0]);
+	    container = container.enter().append('div').attr('class', "preset-icon-container ".concat(_sizeClass)).merge(container);
+	    container.classed('showing-img', !!imageURL).classed('fallback', isFallback);
+	    renderPointBorder(container, drawPoint);
+	    renderCircleFill(container, drawVertex);
+	    renderSquareFill(container, drawArea, tagClasses);
+	    renderLine(container, drawLine, tagClasses);
+	    renderRoute(container, drawRoute, p);
+	    var icon = container.selectAll('.preset-icon').data(picon ? [0] : []);
+	    icon.exit().remove();
+	    icon = icon.enter().append('div').attr('class', 'preset-icon').call(svgIcon('')).merge(icon);
+	    icon.attr('class', 'preset-icon ' + (geom ? geom + '-geom' : '')).classed('framed', isFramed).classed('preset-icon-iD', isiDIcon);
+	    icon.selectAll('svg').attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line' ? '' : tagClasses));
+	    icon.selectAll('use').attr('href', '#' + picon + (isMaki ? isSmall() && geom === 'point' ? '-11' : '-15' : ''));
+	    var imageIcon = container.selectAll('img.image-icon').data(imageURL ? [0] : []);
+	    imageIcon.exit().remove();
+	    imageIcon = imageIcon.enter().append('img').attr('class', 'image-icon').on('load', function () {
+	      return container.classed('showing-img', true);
+	    }).on('error', function () {
+	      return container.classed('showing-img', false);
+	    }).merge(imageIcon);
+	    imageIcon.attr('src', imageURL);
+	  }
+
+	  presetIcon.preset = function (val) {
+	    if (!arguments.length) return _preset;
+	    _preset = utilFunctor(val);
+	    return presetIcon;
+	  };
 
-	        tagSection = tagSection.enter()
-	            .append('div')
-	            .attr('class', 'modal-section tag-section raw-tag-editor')
-	            .merge(tagSection);
+	  presetIcon.geometry = function (val) {
+	    if (!arguments.length) return _geometry;
+	    _geometry = utilFunctor(val);
+	    return presetIcon;
+	  };
 
-	        tagSection
-	            .call(rawTagEditor
-	                .tags(Object.assign({}, context.changeset.tags))   // shallow copy
-	                .render
-	            );
+	  presetIcon.sizeClass = function (val) {
+	    if (!arguments.length) return _sizeClass;
+	    _sizeClass = val;
+	    return presetIcon;
+	  };
 
-	        var changesSection = body.selectAll('.commit-changes-section')
-	            .data([0]);
+	  return presetIcon;
+	}
 
-	        changesSection = changesSection.enter()
-	            .append('div')
-	            .attr('class', 'modal-section commit-changes-section')
-	            .merge(changesSection);
+	function uiSectionFeatureType(context) {
+	  var dispatch$1 = dispatch('choose');
+	  var _entityIDs = [];
+	  var _presets = [];
+
+	  var _tagReference;
+
+	  var section = uiSection('feature-type', context).label(_t.html('inspector.feature_type')).disclosureContent(renderDisclosureContent);
+
+	  function renderDisclosureContent(selection) {
+	    selection.classed('preset-list-item', true);
+	    selection.classed('mixed-types', _presets.length > 1);
+	    var presetButtonWrap = selection.selectAll('.preset-list-button-wrap').data([0]).enter().append('div').attr('class', 'preset-list-button-wrap');
+	    var presetButton = presetButtonWrap.append('button').attr('class', 'preset-list-button preset-reset').call(uiTooltip().title(_t.html('inspector.back_tooltip')).placement('bottom'));
+	    presetButton.append('div').attr('class', 'preset-icon-container');
+	    presetButton.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+	    presetButtonWrap.append('div').attr('class', 'accessory-buttons');
+	    var tagReferenceBodyWrap = selection.selectAll('.tag-reference-body-wrap').data([0]);
+	    tagReferenceBodyWrap = tagReferenceBodyWrap.enter().append('div').attr('class', 'tag-reference-body-wrap').merge(tagReferenceBodyWrap); // update header
+
+	    if (_tagReference) {
+	      selection.selectAll('.preset-list-button-wrap .accessory-buttons').style('display', _presets.length === 1 ? null : 'none').call(_tagReference.button);
+	      tagReferenceBodyWrap.style('display', _presets.length === 1 ? null : 'none').call(_tagReference.body);
+	    }
+
+	    selection.selectAll('.preset-reset').on('click', function () {
+	      dispatch$1.call('choose', this, _presets);
+	    }).on('pointerdown pointerup mousedown mouseup', function (d3_event) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	    });
+	    var geometries = entityGeometries();
+	    selection.select('.preset-list-item button').call(uiPresetIcon().geometry(_presets.length === 1 ? geometries.length === 1 && geometries[0] : null).preset(_presets.length === 1 ? _presets[0] : _mainPresetIndex.item('point')));
+	    var names = _presets.length === 1 ? [_presets[0].nameLabel(), _presets[0].subtitleLabel()].filter(Boolean) : [_t('inspector.multiple_types')];
+	    var label = selection.select('.label-inner');
+	    var nameparts = label.selectAll('.namepart').data(names, function (d) {
+	      return d;
+	    });
+	    nameparts.exit().remove();
+	    nameparts.enter().append('div').attr('class', 'namepart').html(function (d) {
+	      return d;
+	    });
+	  }
 
-	        // Change summary
-	        changesSection.call(commitChanges.render);
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return section;
+	  };
 
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets; // don't reload the same preset
 
-	        function toggleRequestReview() {
-	            var rr = requestReviewInput.property('checked');
-	            updateChangeset({ review_requested: (rr ? 'yes' : undefined) });
+	    if (!utilArrayIdentical(val, _presets)) {
+	      _presets = val;
 
-	            tagSection
-	                .call(rawTagEditor
-	                    .tags(Object.assign({}, context.changeset.tags))   // shallow copy
-	                    .render
-	                );
-	        }
+	      if (_presets.length === 1) {
+	        _tagReference = uiTagReference(_presets[0].reference()).showing(false);
+	      }
 	    }
 
+	    return section;
+	  };
 
-	    function getUploadBlockerMessage() {
-	        var errors = context.validator()
-	            .getIssuesBySeverity({ what: 'edited', where: 'all' }).error;
-
-	        if (errors.length) {
-	            return _t('commit.outstanding_errors_message', { count: errors.length });
+	  function entityGeometries() {
+	    var counts = {};
 
-	        } else {
-	            var hasChangesetComment = context.changeset && context.changeset.tags.comment && context.changeset.tags.comment.trim().length;
-	            if (!hasChangesetComment) {
-	                return _t('commit.comment_needed_message');
-	            }
-	        }
-	        return null;
+	    for (var i in _entityIDs) {
+	      var geometry = context.graph().geometry(_entityIDs[i]);
+	      if (!counts[geometry]) counts[geometry] = 0;
+	      counts[geometry] += 1;
 	    }
 
+	    return Object.keys(counts).sort(function (geom1, geom2) {
+	      return counts[geom2] - counts[geom1];
+	    });
+	  }
 
-	    function changeTags(_, changed, onInput) {
-	        if (changed.hasOwnProperty('comment')) {
-	            if (changed.comment === undefined) {
-	                changed.comment = '';
-	            }
-	            if (!onInput) {
-	                corePreferences('comment', changed.comment);
-	                corePreferences('commentDate', Date.now());
-	            }
-	        }
-	        if (changed.hasOwnProperty('source')) {
-	            if (changed.source === undefined) {
-	                corePreferences('source', null);
-	            } else if (!onInput) {
-	                corePreferences('source', changed.source);
-	                corePreferences('commentDate', Date.now());
-	            }
-	        }
-	        // no need to update `prefs` for `hashtags` here since it's done in `updateChangeset`
+	  return utilRebind(section, dispatch$1, 'on');
+	}
 
-	        updateChangeset(changed, onInput);
+	// It borrows some code from uiHelp
 
-	        if (_selection) {
-	            _selection.call(render);
-	        }
-	    }
+	function uiFieldHelp(context, fieldName) {
+	  var fieldHelp = {};
 
+	  var _inspector = select(null);
 
-	    function findHashtags(tags, commentOnly) {
-	        var detectedHashtags = commentHashtags();
+	  var _wrap = select(null);
 
-	        if (detectedHashtags.length) {
-	            // always remove stored hashtags if there are hashtags in the comment - #4304
-	            corePreferences('hashtags', null);
-	        }
-	        if (!detectedHashtags.length || !commentOnly) {
-	            detectedHashtags = detectedHashtags.concat(hashtagHashtags());
-	        }
+	  var _body = select(null);
 
-	        var allLowerCase = new Set();
-	        return detectedHashtags.filter(function(hashtag) {
-	            // Compare tags as lowercase strings, but keep original case tags
-	            var lowerCase = hashtag.toLowerCase();
-	            if (!allLowerCase.has(lowerCase)) {
-	                allLowerCase.add(lowerCase);
-	                return true;
-	            }
-	            return false;
-	        });
+	  var fieldHelpKeys = {
+	    restrictions: [['about', ['about', 'from_via_to', 'maxdist', 'maxvia']], ['inspecting', ['about', 'from_shadow', 'allow_shadow', 'restrict_shadow', 'only_shadow', 'restricted', 'only']], ['modifying', ['about', 'indicators', 'allow_turn', 'restrict_turn', 'only_turn']], ['tips', ['simple', 'simple_example', 'indirect', 'indirect_example', 'indirect_noedit']]]
+	  };
+	  var fieldHelpHeadings = {};
+	  var replacements = {
+	    distField: _t.html('restriction.controls.distance'),
+	    viaField: _t.html('restriction.controls.via'),
+	    fromShadow: icon('#iD-turn-shadow', 'inline shadow from'),
+	    allowShadow: icon('#iD-turn-shadow', 'inline shadow allow'),
+	    restrictShadow: icon('#iD-turn-shadow', 'inline shadow restrict'),
+	    onlyShadow: icon('#iD-turn-shadow', 'inline shadow only'),
+	    allowTurn: icon('#iD-turn-yes', 'inline turn'),
+	    restrictTurn: icon('#iD-turn-no', 'inline turn'),
+	    onlyTurn: icon('#iD-turn-only', 'inline turn')
+	  }; // For each section, squash all the texts into a single markdown document
 
-	        // Extract hashtags from `comment`
-	        function commentHashtags() {
-	            var matches = (tags.comment || '')
-	                .replace(/http\S*/g, '')  // drop anything that looks like a URL - #4289
-	                .match(hashtagRegex);
+	  var docs = fieldHelpKeys[fieldName].map(function (key) {
+	    var helpkey = 'help.field.' + fieldName + '.' + key[0];
+	    var text = key[1].reduce(function (all, part) {
+	      var subkey = helpkey + '.' + part;
+	      var depth = fieldHelpHeadings[subkey]; // is this subkey a heading?
 
-	            return matches || [];
-	        }
+	      var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
 
-	        // Extract and clean hashtags from `hashtags`
-	        function hashtagHashtags() {
-	            var matches = (tags.hashtags || '')
-	                .split(/[,;\s]+/)
-	                .map(function (s) {
-	                    if (s[0] !== '#') { s = '#' + s; }    // prepend '#'
-	                    var matched = s.match(hashtagRegex);
-	                    return matched && matched[0];
-	                }).filter(Boolean);                       // exclude falsy
+	      return all + hhh + _t.html(subkey, replacements) + '\n\n';
+	    }, '');
+	    return {
+	      key: helpkey,
+	      title: _t.html(helpkey + '.title'),
+	      html: marked_1(text.trim())
+	    };
+	  });
 
-	            return matches || [];
-	        }
-	    }
+	  function show() {
+	    updatePosition();
 
+	    _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
+	  }
 
-	    function isReviewRequested(tags) {
-	        var rr = tags.review_requested;
-	        if (rr === undefined) { return false; }
-	        rr = rr.trim().toLowerCase();
-	        return !(rr === '' || rr === 'no');
-	    }
+	  function hide() {
+	    _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
+	      _body.classed('hide', true);
+	    });
+	  }
 
+	  function clickHelp(index) {
+	    var d = docs[index];
+	    var tkeys = fieldHelpKeys[fieldName][index][1];
 
-	    function updateChangeset(changed, onInput) {
-	        var tags = Object.assign({}, context.changeset.tags);   // shallow copy
+	    _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
+	      return i === index;
+	    });
 
-	        Object.keys(changed).forEach(function(k) {
-	            var v = changed[k];
-	            k = context.cleanTagKey(k);
-	            if (readOnlyTags.indexOf(k) !== -1) { return; }
+	    var content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them
 
-	            if (k !== '' && v !== undefined) {
-	                if (onInput) {
-	                    tags[k] = v;
-	                } else {
-	                    tags[k] = context.cleanTagValue(v);
-	                }
-	            } else {
-	                delete tags[k];
-	            }
-	        });
 
-	        if (!onInput) {
-	            // when changing the comment, override hashtags with any found in comment.
-	            var commentOnly = changed.hasOwnProperty('comment') && (changed.comment !== '');
-	            var arr = findHashtags(tags, commentOnly);
-	            if (arr.length) {
-	                tags.hashtags = context.cleanTagValue(arr.join(';'));
-	                corePreferences('hashtags', tags.hashtags);
-	            } else {
-	                delete tags.hashtags;
-	                corePreferences('hashtags', null);
-	            }
-	        }
+	    content.selectAll('p').attr('class', function (d, i) {
+	      return tkeys[i];
+	    }); // insert special content for certain help sections
 
-	        // always update userdetails, just in case user reauthenticates as someone else
-	        if (_userDetails && _userDetails.changesets_count !== undefined) {
-	            var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1;  // #4283
-	            tags.changesets_count = String(changesetsCount);
+	    if (d.key === 'help.field.restrictions.inspecting') {
+	      content.insert('img', 'p.from_shadow').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_inspect.gif'));
+	    } else if (d.key === 'help.field.restrictions.modifying') {
+	      content.insert('img', 'p.allow_turn').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_modify.gif'));
+	    }
+	  }
 
-	            // first 100 edits - new user
-	            if (changesetsCount <= 100) {
-	                var s;
-	                s = corePreferences('walkthrough_completed');
-	                if (s) {
-	                    tags['ideditor:walkthrough_completed'] = s;
-	                }
+	  fieldHelp.button = function (selection) {
+	    if (_body.empty()) return;
+	    var button = selection.selectAll('.field-help-button').data([0]); // enter/update
 
-	                s = corePreferences('walkthrough_progress');
-	                if (s) {
-	                    tags['ideditor:walkthrough_progress'] = s;
-	                }
+	    button.enter().append('button').attr('class', 'field-help-button').call(svgIcon('#iD-icon-help')).merge(button).on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
 
-	                s = corePreferences('walkthrough_started');
-	                if (s) {
-	                    tags['ideditor:walkthrough_started'] = s;
-	                }
-	            }
-	        } else {
-	            delete tags.changesets_count;
-	        }
+	      if (_body.classed('hide')) {
+	        show();
+	      } else {
+	        hide();
+	      }
+	    });
+	  };
 
-	        if (!fastDeepEqual(context.changeset.tags, tags)) {
-	            context.changeset = context.changeset.update({ tags: tags });
-	        }
-	    }
+	  function updatePosition() {
+	    var wrap = _wrap.node();
 
+	    var inspector = _inspector.node();
 
-	    commit.reset = function() {
-	        context.changeset = null;
-	    };
+	    var wRect = wrap.getBoundingClientRect();
+	    var iRect = inspector.getBoundingClientRect();
 
+	    _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
+	  }
 
-	    return utilRebind(commit, dispatch$1, 'on');
-	}
+	  fieldHelp.body = function (selection) {
+	    // This control expects the field to have a form-field-input-wrap div
+	    _wrap = selection.selectAll('.form-field-input-wrap');
+	    if (_wrap.empty()) return; // absolute position relative to the inspector, so it "floats" above the fields
 
-	var RADIUS = 6378137;
-	var FLATTENING = 1/298.257223563;
-	var POLAR_RADIUS$1 = 6356752.3142;
+	    _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
+	    if (_inspector.empty()) return;
+	    _body = _inspector.selectAll('.field-help-body').data([0]);
 
-	var wgs84 = {
-		RADIUS: RADIUS,
-		FLATTENING: FLATTENING,
-		POLAR_RADIUS: POLAR_RADIUS$1
-	};
+	    var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden
 
-	var geometry_1 = geometry;
-	var ring = ringArea;
 
-	function geometry(_) {
-	    var area = 0, i;
-	    switch (_.type) {
-	        case 'Polygon':
-	            return polygonArea(_.coordinates);
-	        case 'MultiPolygon':
-	            for (i = 0; i < _.coordinates.length; i++) {
-	                area += polygonArea(_.coordinates[i]);
-	            }
-	            return area;
-	        case 'Point':
-	        case 'MultiPoint':
-	        case 'LineString':
-	        case 'MultiLineString':
-	            return 0;
-	        case 'GeometryCollection':
-	            for (i = 0; i < _.geometries.length; i++) {
-	                area += geometry(_.geometries[i]);
-	            }
-	            return area;
-	    }
-	}
+	    var titleEnter = enter.append('div').attr('class', 'field-help-title cf');
+	    titleEnter.append('h2').attr('class', _mainLocalizer.textDirection() === 'rtl' ? 'fr' : 'fl').html(_t.html('help.field.' + fieldName + '.title'));
+	    titleEnter.append('button').attr('class', 'fr close').on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      hide();
+	    }).call(svgIcon('#iD-icon-close'));
+	    var navEnter = enter.append('div').attr('class', 'field-help-nav cf');
+	    var titles = docs.map(function (d) {
+	      return d.title;
+	    });
+	    navEnter.selectAll('.field-help-nav-item').data(titles).enter().append('div').attr('class', 'field-help-nav-item').html(function (d) {
+	      return d;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      clickHelp(titles.indexOf(d));
+	    });
+	    enter.append('div').attr('class', 'field-help-content');
+	    _body = _body.merge(enter);
+	    clickHelp(0);
+	  };
 
-	function polygonArea(coords) {
-	    var area = 0;
-	    if (coords && coords.length > 0) {
-	        area += Math.abs(ringArea(coords[0]));
-	        for (var i = 1; i < coords.length; i++) {
-	            area -= Math.abs(ringArea(coords[i]));
-	        }
-	    }
-	    return area;
+	  return fieldHelp;
 	}
 
-	/**
-	 * Calculate the approximate area of the polygon were it projected onto
-	 *     the earth.  Note that this area will be positive if ring is oriented
-	 *     clockwise, otherwise it will be negative.
-	 *
-	 * Reference:
-	 * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
-	 *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
-	 *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
-	 *
-	 * Returns:
-	 * {float} The approximate signed geodesic area of the polygon in square
-	 *     meters.
-	 */
+	function uiFieldCheck(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var options = field.strings && field.strings.options;
+	  var values = [];
+	  var texts = [];
 
-	function ringArea(coords) {
-	    var p1, p2, p3, lowerIndex, middleIndex, upperIndex, i,
-	    area = 0,
-	    coordsLength = coords.length;
-
-	    if (coordsLength > 2) {
-	        for (i = 0; i < coordsLength; i++) {
-	            if (i === coordsLength - 2) {// i = N-2
-	                lowerIndex = coordsLength - 2;
-	                middleIndex = coordsLength -1;
-	                upperIndex = 0;
-	            } else if (i === coordsLength - 1) {// i = N-1
-	                lowerIndex = coordsLength - 1;
-	                middleIndex = 0;
-	                upperIndex = 1;
-	            } else { // i = 0 to N-3
-	                lowerIndex = i;
-	                middleIndex = i+1;
-	                upperIndex = i+2;
-	            }
-	            p1 = coords[lowerIndex];
-	            p2 = coords[middleIndex];
-	            p3 = coords[upperIndex];
-	            area += ( rad(p3[0]) - rad(p1[0]) ) * Math.sin( rad(p2[1]));
-	        }
+	  var _tags;
 
-	        area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
-	    }
+	  var input = select(null);
+	  var text = select(null);
+	  var label = select(null);
+	  var reverser = select(null);
 
-	    return area;
-	}
+	  var _impliedYes;
 
-	function rad(_) {
-	    return _ * Math.PI / 180;
-	}
+	  var _entityIDs = [];
 
-	var geojsonArea = {
-		geometry: geometry_1,
-		ring: ring
-	};
+	  var _value;
 
-	function toRadians(angleInDegrees) {
-	  return (angleInDegrees * Math.PI) / 180;
-	}
+	  if (options) {
+	    for (var k in options) {
+	      values.push(k === 'undefined' ? undefined : k);
+	      texts.push(field.t.html('options.' + k, {
+	        'default': options[k]
+	      }));
+	    }
+	  } else {
+	    values = [undefined, 'yes'];
+	    texts = [_t.html('inspector.unknown'), _t.html('inspector.check.yes')];
 
-	function toDegrees(angleInRadians) {
-	  return (angleInRadians * 180) / Math.PI;
-	}
+	    if (field.type !== 'defaultCheck') {
+	      values.push('no');
+	      texts.push(_t.html('inspector.check.no'));
+	    }
+	  } // Checks tags to see whether an undefined value is "Assumed to be Yes"
 
-	function offset(c1, distance, bearing) {
-	  var lat1 = toRadians(c1[1]);
-	  var lon1 = toRadians(c1[0]);
-	  var dByR = distance / 6378137; // distance divided by 6378137 (radius of the earth) wgs84
-	  var lat = Math.asin(
-	    Math.sin(lat1) * Math.cos(dByR) +
-	      Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing)
-	  );
-	  var lon =
-	    lon1 +
-	    Math.atan2(
-	      Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1),
-	      Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat)
-	    );
-	  return [toDegrees(lon), toDegrees(lat)];
-	}
 
-	function validateCenter(center) {
-	  var validCenterLengths = [2, 3];
-	  if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
-	    throw new Error("ERROR! Center has to be an array of length two or three");
-	  }
-	  var lng = center[0];
-	  var lat = center[1];
-	  if (typeof lng !== "number" || typeof lat !== "number") {
-	    throw new Error(
-	      ("ERROR! Longitude and Latitude has to be numbers but where " + (typeof lng) + " and " + (typeof lat))
-	    );
-	  }
-	  if (lng > 180 || lng < -180) {
-	    throw new Error(
-	      ("ERROR! Longitude has to be between -180 and 180 but was " + lng)
-	    );
-	  }
+	  function checkImpliedYes() {
+	    _impliedYes = field.id === 'oneway_yes'; // hack: pretend `oneway` field is a `oneway_yes` field
+	    // where implied oneway tag exists (e.g. `junction=roundabout`) #2220, #1841
 
-	  if (lat > 90 || lat < -90) {
-	    throw new Error(
-	      ("ERROR! Latitude has to be between -90 and 90 but was " + lat)
-	    );
-	  }
-	}
+	    if (field.id === 'oneway') {
+	      var entity = context.entity(_entityIDs[0]);
 
-	function validateRadius(radius) {
-	  if (typeof radius !== "number") {
-	    throw new Error(
-	      ("ERROR! Radius has to be a positive number but was: " + (typeof radius))
-	    );
+	      for (var key in entity.tags) {
+	        if (key in osmOneWayTags && entity.tags[key] in osmOneWayTags[key]) {
+	          _impliedYes = true;
+	          texts[0] = _t.html('presets.fields.oneway_yes.options.undefined');
+	          break;
+	        }
+	      }
+	    }
 	  }
 
-	  if (radius <= 0) {
-	    throw new Error(
-	      ("ERROR! Radius has to be a positive number but was: " + radius)
-	    );
+	  function reverserHidden() {
+	    if (!context.container().select('div.inspector-hover').empty()) return true;
+	    return !(_value === 'yes' || _impliedYes && !_value);
 	  }
-	}
 
-	function validateNumberOfSegments(numberOfSegments) {
-	  if (typeof numberOfSegments !== "number" && numberOfSegments !== undefined) {
-	    throw new Error(
-	      ("ERROR! Number of segments has to be a number but was: " + (typeof numberOfSegments))
-	    );
+	  function reverserSetText(selection) {
+	    var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
+	    if (reverserHidden() || !entity) return selection;
+	    var first = entity.first();
+	    var last = entity.isClosed() ? entity.nodes[entity.nodes.length - 2] : entity.last();
+	    var pseudoDirection = first < last;
+	    var icon = pseudoDirection ? '#iD-icon-forward' : '#iD-icon-backward';
+	    selection.selectAll('.reverser-span').html(_t.html('inspector.check.reverser')).call(svgIcon(icon, 'inline'));
+	    return selection;
 	  }
 
-	  if (numberOfSegments < 3) {
-	    throw new Error(
-	      ("ERROR! Number of segments has to be at least 3 but was: " + numberOfSegments)
-	    );
-	  }
-	}
+	  var check = function check(selection) {
+	    checkImpliedYes();
+	    label = selection.selectAll('.form-field-input-wrap').data([0]);
+	    var enter = label.enter().append('label').attr('class', 'form-field-input-wrap form-field-input-check');
+	    enter.append('input').property('indeterminate', field.type !== 'defaultCheck').attr('type', 'checkbox').attr('id', field.domId);
+	    enter.append('span').html(texts[0]).attr('class', 'value');
 
-	function validateInput(ref) {
-	  var center = ref.center;
-	  var radius = ref.radius;
-	  var numberOfSegments = ref.numberOfSegments;
+	    if (field.type === 'onewayCheck') {
+	      enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
+	    }
 
-	  validateCenter(center);
-	  validateRadius(radius);
-	  validateNumberOfSegments(numberOfSegments);
-	}
+	    label = label.merge(enter);
+	    input = label.selectAll('input');
+	    text = label.selectAll('span.value');
+	    input.on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      var t = {};
 
-	var circleToPolygon = function circleToPolygon(center, radius, numberOfSegments) {
-	  var n = numberOfSegments ? numberOfSegments : 32;
+	      if (Array.isArray(_tags[field.key])) {
+	        if (values.indexOf('yes') !== -1) {
+	          t[field.key] = 'yes';
+	        } else {
+	          t[field.key] = values[0];
+	        }
+	      } else {
+	        t[field.key] = values[(values.indexOf(_value) + 1) % values.length];
+	      } // Don't cycle through `alternating` or `reversible` states - #4970
+	      // (They are supported as translated strings, but should not toggle with clicks)
 
-	  // validateInput() throws error on invalid input and do nothing on valid input
-	  validateInput({ center: center, radius: radius, numberOfSegments: numberOfSegments });
 
-	  var coordinates = [];
-	  for (var i = 0; i < n; ++i) {
-	    coordinates.push(offset(center, radius, (2 * Math.PI * -i) / n));
-	  }
-	  coordinates.push(coordinates[0]);
+	      if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
+	        t[field.key] = values[0];
+	      }
 
-	  return {
-	    type: "Polygon",
-	    coordinates: [coordinates]
-	  };
-	};
+	      dispatch$1.call('change', this, t);
+	    });
 
-	var geojsonPrecision = createCommonjsModule(function (module) {
-	(function() {
+	    if (field.type === 'onewayCheck') {
+	      reverser = label.selectAll('.reverser');
+	      reverser.call(reverserSetText).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        context.perform(function (graph) {
+	          for (var i in _entityIDs) {
+	            graph = actionReverse(_entityIDs[i])(graph);
+	          }
 
-	  function parse(t, coordinatePrecision, extrasPrecision) {
+	          return graph;
+	        }, _t('operations.reverse.annotation.line', {
+	          n: 1
+	        })); // must manually revalidate since no 'change' event was called
 
-	    function point(p) {
-	      return p.map(function(e, index) {
-	        if (index < 2) {
-	            return 1 * e.toFixed(coordinatePrecision);
-	        } else {
-	            return 1 * e.toFixed(extrasPrecision);
-	        }
+	        context.validator().validate();
+	        select(this).call(reverserSetText);
 	      });
 	    }
+	  };
 
-	    function multi(l) {
-	      return l.map(point);
-	    }
-
-	    function poly(p) {
-	      return p.map(multi);
-	    }
+	  check.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return check;
+	  };
 
-	    function multiPoly(m) {
-	      return m.map(poly);
-	    }
+	  check.tags = function (tags) {
+	    _tags = tags;
 
-	    function geometry(obj) {
-	      if (!obj) {
-	        return {};
-	      }
-	      
-	      switch (obj.type) {
-	        case "Point":
-	          obj.coordinates = point(obj.coordinates);
-	          return obj;
-	        case "LineString":
-	        case "MultiPoint":
-	          obj.coordinates = multi(obj.coordinates);
-	          return obj;
-	        case "Polygon":
-	        case "MultiLineString":
-	          obj.coordinates = poly(obj.coordinates);
-	          return obj;
-	        case "MultiPolygon":
-	          obj.coordinates = multiPoly(obj.coordinates);
-	          return obj;
-	        case "GeometryCollection":
-	          obj.geometries = obj.geometries.map(geometry);
-	          return obj;
-	        default :
-	          return {};
-	      }
+	    function isChecked(val) {
+	      return val !== 'no' && val !== '' && val !== undefined && val !== null;
 	    }
 
-	    function feature(obj) {
-	      obj.geometry = geometry(obj.geometry);
-	      return obj
+	    function textFor(val) {
+	      if (val === '') val = undefined;
+	      var index = values.indexOf(val);
+	      return index !== -1 ? texts[index] : '"' + val + '"';
 	    }
 
-	    function featureCollection(f) {
-	      f.features = f.features.map(feature);
-	      return f;
-	    }
+	    checkImpliedYes();
+	    var isMixed = Array.isArray(tags[field.key]);
+	    _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
 
-	    function geometryCollection(g) {
-	      g.geometries = g.geometries.map(geometry);
-	      return g;
+	    if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
+	      _value = 'yes';
 	    }
 
-	    if (!t) {
-	      return t;
-	    }
+	    input.property('indeterminate', isMixed || field.type !== 'defaultCheck' && !_value).property('checked', isChecked(_value));
+	    text.html(isMixed ? _t.html('inspector.multiple_values') : textFor(_value)).classed('mixed', isMixed);
+	    label.classed('set', !!_value);
 
-	    switch (t.type) {
-	      case "Feature":
-	        return feature(t);
-	      case "GeometryCollection" :
-	        return geometryCollection(t);
-	      case "FeatureCollection" :
-	        return featureCollection(t);
-	      case "Point":
-	      case "LineString":
-	      case "Polygon":
-	      case "MultiPoint":
-	      case "MultiPolygon":
-	      case "MultiLineString":
-	        return geometry(t);
-	      default :
-	        return t;
+	    if (field.type === 'onewayCheck') {
+	      reverser.classed('hide', reverserHidden()).call(reverserSetText);
 	    }
-	      
-	  }
-
-	  module.exports = parse;
-	  module.exports.parse = parse;
+	  };
 
-	}());
-	});
+	  check.focus = function () {
+	    input.node().focus();
+	  };
 
-	/* Polyfill service v3.13.0
-	 * For detailed credits and licence information see http://github.com/financial-times/polyfill-service
-	 *
-	 * - Array.prototype.fill, License: CC0 */
+	  return utilRebind(check, dispatch$1, 'on');
+	}
 
-	if (!('fill' in Array.prototype)) {
-	  Object.defineProperty(Array.prototype, 'fill', {
-	    configurable: true,
-	    value: function fill (value) {
-	      if (this === undefined || this === null) {
-	        throw new TypeError(this + ' is not an object')
-	      }
+	function uiFieldCombo(field, context) {
+	  var dispatch$1 = dispatch('change');
 
-	      var arrayLike = Object(this);
+	  var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';
 
-	      var length = Math.max(Math.min(arrayLike.length, 9007199254740991), 0) || 0;
+	  var _isNetwork = field.type === 'networkCombo';
 
-	      var relativeStart = 1 in arguments ? parseInt(Number(arguments[1]), 10) || 0 : 0;
+	  var _isSemi = field.type === 'semiCombo';
 
-	      relativeStart = relativeStart < 0 ? Math.max(length + relativeStart, 0) : Math.min(relativeStart, length);
+	  var _optstrings = field.strings && field.strings.options;
 
-	      var relativeEnd = 2 in arguments && arguments[2] !== undefined ? parseInt(Number(arguments[2]), 10) || 0 : length;
+	  var _optarray = field.options;
 
-	      relativeEnd = relativeEnd < 0 ? Math.max(length + arguments[2], 0) : Math.min(relativeEnd, length);
+	  var _snake_case = field.snake_case || field.snake_case === undefined;
 
-	      while (relativeStart < relativeEnd) {
-	        arrayLike[relativeStart] = value;
+	  var _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);
 
-	        ++relativeStart;
-	      }
+	  var _container = select(null);
 
-	      return arrayLike
-	    },
-	    writable: true
-	  });
-	}
+	  var _inputWrap = select(null);
 
-	/**
-	 * Polyfill for IE support
-	 */
-	Number.isFinite = Number.isFinite || function (value) {
-	  return typeof value === 'number' && isFinite(value)
-	};
+	  var _input = select(null);
 
-	Number.isInteger = Number.isInteger || function (val) {
-	  return typeof val === 'number' &&
-	  isFinite(val) &&
-	  Math.floor(val) === val
-	};
+	  var _comboData = [];
+	  var _multiData = [];
+	  var _entityIDs = [];
 
-	Number.parseFloat = Number.parseFloat || parseFloat;
+	  var _tags;
 
-	Number.isNaN = Number.isNaN || function (value) {
-	  return value !== value // eslint-disable-line
-	};
+	  var _countryCode;
 
-	/**
-	 * Polyfill for IE support
-	 */
-	Math.trunc = Math.trunc || function (x) {
-	  return x < 0 ? Math.ceil(x) : Math.floor(x)
-	};
+	  var _staticPlaceholder; // initialize deprecated tags array
 
-	var NumberUtil = function NumberUtil () {};
 
-	NumberUtil.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	NumberUtil.prototype.getClass = function getClass () {
-	  return NumberUtil
-	};
-	NumberUtil.prototype.equalsWithTolerance = function equalsWithTolerance (x1, x2, tolerance) {
-	  return Math.abs(x1 - x2) <= tolerance
-	};
+	  var _dataDeprecated = [];
+	  _mainFileFetcher.get('deprecated').then(function (d) {
+	    _dataDeprecated = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  }); // ensure multiCombo field.key ends with a ':'
 
-	var IllegalArgumentException = (function (Error) {
-		function IllegalArgumentException (message) {
-			Error.call(this, message);
-			this.name = 'IllegalArgumentException';
-			this.message = message;
-			this.stack = (new Error()).stack;
-		}
-
-		if ( Error ) { IllegalArgumentException.__proto__ = Error; }
-		IllegalArgumentException.prototype = Object.create( Error && Error.prototype );
-		IllegalArgumentException.prototype.constructor = IllegalArgumentException;
-
-		return IllegalArgumentException;
-	}(Error));
-
-	var Double = function Double () {};
-
-	var staticAccessors$1 = { MAX_VALUE: { configurable: true } };
-
-	Double.isNaN = function isNaN (n) { return Number.isNaN(n) };
-	Double.doubleToLongBits = function doubleToLongBits (n) { return n };
-	Double.longBitsToDouble = function longBitsToDouble (n) { return n };
-	Double.isInfinite = function isInfinite (n) { return !Number.isFinite(n) };
-	staticAccessors$1.MAX_VALUE.get = function () { return Number.MAX_VALUE };
-
-	Object.defineProperties( Double, staticAccessors$1 );
-
-	var Comparable = function Comparable () {};
-
-	var Clonable = function Clonable () {};
-
-	var Comparator = function Comparator () {};
-
-	function Serializable () {}
-
-	// import Assert from '../util/Assert'
-
-	var Coordinate = function Coordinate () {
-	  this.x = null;
-	  this.y = null;
-	  this.z = null;
-	  if (arguments.length === 0) {
-	    this.x = 0.0;
-	    this.y = 0.0;
-	    this.z = Coordinate.NULL_ORDINATE;
-	  } else if (arguments.length === 1) {
-	    var c = arguments[0];
-	    this.x = c.x;
-	    this.y = c.y;
-	    this.z = c.z;
-	  } else if (arguments.length === 2) {
-	    this.x = arguments[0];
-	    this.y = arguments[1];
-	    this.z = Coordinate.NULL_ORDINATE;
-	  } else if (arguments.length === 3) {
-	    this.x = arguments[0];
-	    this.y = arguments[1];
-	    this.z = arguments[2];
+	  if (_isMulti && field.key && /[^:]$/.test(field.key)) {
+	    field.key += ':';
 	  }
-	};
 
-	var staticAccessors = { DimensionalComparator: { configurable: true },serialVersionUID: { configurable: true },NULL_ORDINATE: { configurable: true },X: { configurable: true },Y: { configurable: true },Z: { configurable: true } };
-	Coordinate.prototype.setOrdinate = function setOrdinate (ordinateIndex, value) {
-	  switch (ordinateIndex) {
-	    case Coordinate.X:
-	      this.x = value;
-	      break
-	    case Coordinate.Y:
-	      this.y = value;
-	      break
-	    case Coordinate.Z:
-	      this.z = value;
-	      break
-	    default:
-	      throw new IllegalArgumentException('Invalid ordinate index: ' + ordinateIndex)
-	  }
-	};
-	Coordinate.prototype.equals2D = function equals2D () {
-	  if (arguments.length === 1) {
-	    var other = arguments[0];
-	    if (this.x !== other.x) {
-	      return false
-	    }
-	    if (this.y !== other.y) {
-	      return false
-	    }
-	    return true
-	  } else if (arguments.length === 2) {
-	    var c = arguments[0];
-	    var tolerance = arguments[1];
-	    if (!NumberUtil.equalsWithTolerance(this.x, c.x, tolerance)) {
-	      return false
-	    }
-	    if (!NumberUtil.equalsWithTolerance(this.y, c.y, tolerance)) {
-	      return false
-	    }
-	    return true
-	  }
-	};
-	Coordinate.prototype.getOrdinate = function getOrdinate (ordinateIndex) {
-	  switch (ordinateIndex) {
-	    case Coordinate.X:
-	      return this.x
-	    case Coordinate.Y:
-	      return this.y
-	    case Coordinate.Z:
-	      return this.z
-	  }
-	  throw new IllegalArgumentException('Invalid ordinate index: ' + ordinateIndex)
-	};
-	Coordinate.prototype.equals3D = function equals3D (other) {
-	  return this.x === other.x &&
-	         this.y === other.y &&
-	         ((this.z === other.z || Double.isNaN(this.z)) &&
-	         Double.isNaN(other.z))
-	};
-	Coordinate.prototype.equals = function equals (other) {
-	  if (!(other instanceof Coordinate)) {
-	    return false
-	  }
-	  return this.equals2D(other)
-	};
-	Coordinate.prototype.equalInZ = function equalInZ (c, tolerance) {
-	  return NumberUtil.equalsWithTolerance(this.z, c.z, tolerance)
-	};
-	Coordinate.prototype.compareTo = function compareTo (o) {
-	  var other = o;
-	  if (this.x < other.x) { return -1 }
-	  if (this.x > other.x) { return 1 }
-	  if (this.y < other.y) { return -1 }
-	  if (this.y > other.y) { return 1 }
-	  return 0
-	};
-	Coordinate.prototype.clone = function clone () {
-	  // try {
-	  // var coord = null
-	  // return coord
-	  // } catch (e) {
-	  // if (e instanceof CloneNotSupportedException) {
-	  //   Assert.shouldNeverReachHere("this shouldn't happen because this class is Cloneable")
-	  //   return null
-	  // } else throw e
-	  // } finally {}
-	};
-	Coordinate.prototype.copy = function copy () {
-	  return new Coordinate(this)
-	};
-	Coordinate.prototype.toString = function toString () {
-	  return '(' + this.x + ', ' + this.y + ', ' + this.z + ')'
-	};
-	Coordinate.prototype.distance3D = function distance3D (c) {
-	  var dx = this.x - c.x;
-	  var dy = this.y - c.y;
-	  var dz = this.z - c.z;
-	  return Math.sqrt(dx * dx + dy * dy + dz * dz)
-	};
-	Coordinate.prototype.distance = function distance (c) {
-	  var dx = this.x - c.x;
-	  var dy = this.y - c.y;
-	  return Math.sqrt(dx * dx + dy * dy)
-	};
-	Coordinate.prototype.hashCode = function hashCode () {
-	  var result = 17;
-	  result = 37 * result + Coordinate.hashCode(this.x);
-	  result = 37 * result + Coordinate.hashCode(this.y);
-	  return result
-	};
-	Coordinate.prototype.setCoordinate = function setCoordinate (other) {
-	  this.x = other.x;
-	  this.y = other.y;
-	  this.z = other.z;
-	};
-	Coordinate.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable, Clonable, Serializable]
-	};
-	Coordinate.prototype.getClass = function getClass () {
-	  return Coordinate
-	};
-	Coordinate.hashCode = function hashCode () {
-	  if (arguments.length === 1) {
-	    var x = arguments[0];
-	    var f = Double.doubleToLongBits(x);
-	    return Math.trunc((f ^ f) >>> 32)
+	  function snake(s) {
+	    return s.replace(/\s+/g, '_');
 	  }
-	};
-	staticAccessors.DimensionalComparator.get = function () { return DimensionalComparator };
-	staticAccessors.serialVersionUID.get = function () { return 6683108902428366910 };
-	staticAccessors.NULL_ORDINATE.get = function () { return Double.NaN };
-	staticAccessors.X.get = function () { return 0 };
-	staticAccessors.Y.get = function () { return 1 };
-	staticAccessors.Z.get = function () { return 2 };
-
-	Object.defineProperties( Coordinate, staticAccessors );
-
-	var DimensionalComparator = function DimensionalComparator (dimensionsToTest) {
-	  this._dimensionsToTest = 2;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var dimensionsToTest$1 = arguments[0];
-	    if (dimensionsToTest$1 !== 2 && dimensionsToTest$1 !== 3) { throw new IllegalArgumentException('only 2 or 3 dimensions may be specified') }
-	    this._dimensionsToTest = dimensionsToTest$1;
-	  }
-	};
-	DimensionalComparator.prototype.compare = function compare (o1, o2) {
-	  var c1 = o1;
-	  var c2 = o2;
-	  var compX = DimensionalComparator.compare(c1.x, c2.x);
-	  if (compX !== 0) { return compX }
-	  var compY = DimensionalComparator.compare(c1.y, c2.y);
-	  if (compY !== 0) { return compY }
-	  if (this._dimensionsToTest <= 2) { return 0 }
-	  var compZ = DimensionalComparator.compare(c1.z, c2.z);
-	  return compZ
-	};
-	DimensionalComparator.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparator]
-	};
-	DimensionalComparator.prototype.getClass = function getClass () {
-	  return DimensionalComparator
-	};
-	DimensionalComparator.compare = function compare (a, b) {
-	  if (a < b) { return -1 }
-	  if (a > b) { return 1 }
-	  if (Double.isNaN(a)) {
-	    if (Double.isNaN(b)) { return 0 }
-	    return -1
-	  }
-	  if (Double.isNaN(b)) { return 1 }
-	  return 0
-	};
 
-	// import hasInterface from '../../../../hasInterface'
-	// import CoordinateSequence from './CoordinateSequence'
+	  function unsnake(s) {
+	    return s.replace(/_+/g, ' ');
+	  }
 
-	var CoordinateSequenceFactory = function CoordinateSequenceFactory () {};
+	  function clean(s) {
+	    return s.split(';').map(function (s) {
+	      return s.trim();
+	    }).join(';');
+	  } // returns the tag value for a display value
+	  // (for multiCombo, dval should be the key suffix, not the entire key)
 
-	CoordinateSequenceFactory.prototype.create = function create () {
-	  // if (arguments.length === 1) {
-	  // if (arguments[0] instanceof Array) {
-	  //   let coordinates = arguments[0]
-	  // } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	  //   let coordSeq = arguments[0]
-	  // }
-	  // } else if (arguments.length === 2) {
-	  // let size = arguments[0]
-	  // let dimension = arguments[1]
-	  // }
-	};
-	CoordinateSequenceFactory.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateSequenceFactory.prototype.getClass = function getClass () {
-	  return CoordinateSequenceFactory
-	};
 
-	var Location = function Location () {};
+	  function tagValue(dval) {
+	    dval = clean(dval || '');
 
-	var staticAccessors$4 = { INTERIOR: { configurable: true },BOUNDARY: { configurable: true },EXTERIOR: { configurable: true },NONE: { configurable: true } };
+	    if (_optstrings) {
+	      var found = _comboData.find(function (o) {
+	        return o.key && clean(o.value) === dval;
+	      });
 
-	Location.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Location.prototype.getClass = function getClass () {
-	  return Location
-	};
-	Location.toLocationSymbol = function toLocationSymbol (locationValue) {
-	  switch (locationValue) {
-	    case Location.EXTERIOR:
-	      return 'e'
-	    case Location.BOUNDARY:
-	      return 'b'
-	    case Location.INTERIOR:
-	      return 'i'
-	    case Location.NONE:
-	      return '-'
-	  }
-	  throw new IllegalArgumentException('Unknown location value: ' + locationValue)
-	};
-	staticAccessors$4.INTERIOR.get = function () { return 0 };
-	staticAccessors$4.BOUNDARY.get = function () { return 1 };
-	staticAccessors$4.EXTERIOR.get = function () { return 2 };
-	staticAccessors$4.NONE.get = function () { return -1 };
+	      if (found) {
+	        return found.key;
+	      }
+	    }
 
-	Object.defineProperties( Location, staticAccessors$4 );
+	    if (field.type === 'typeCombo' && !dval) {
+	      return 'yes';
+	    }
 
-	var hasInterface = function (o, i) {
-	  return o.interfaces_ && o.interfaces_().indexOf(i) > -1
-	};
+	    return (_snake_case ? snake(dval) : dval) || undefined;
+	  } // returns the display value for a tag value
+	  // (for multiCombo, tval should be the key suffix, not the entire key)
 
-	var MathUtil = function MathUtil () {};
 
-	var staticAccessors$5 = { LOG_10: { configurable: true } };
+	  function displayValue(tval) {
+	    tval = tval || '';
 
-	MathUtil.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MathUtil.prototype.getClass = function getClass () {
-	  return MathUtil
-	};
-	MathUtil.log10 = function log10 (x) {
-	  var ln = Math.log(x);
-	  if (Double.isInfinite(ln)) { return ln }
-	  if (Double.isNaN(ln)) { return ln }
-	  return ln / MathUtil.LOG_10
-	};
-	MathUtil.min = function min (v1, v2, v3, v4) {
-	  var min = v1;
-	  if (v2 < min) { min = v2; }
-	  if (v3 < min) { min = v3; }
-	  if (v4 < min) { min = v4; }
-	  return min
-	};
-	MathUtil.clamp = function clamp () {
-	  if (typeof arguments[2] === 'number' && (typeof arguments[0] === 'number' && typeof arguments[1] === 'number')) {
-	    var x = arguments[0];
-	    var min = arguments[1];
-	    var max = arguments[2];
-	    if (x < min) { return min }
-	    if (x > max) { return max }
-	    return x
-	  } else if (Number.isInteger(arguments[2]) && (Number.isInteger(arguments[0]) && Number.isInteger(arguments[1]))) {
-	    var x$1 = arguments[0];
-	    var min$1 = arguments[1];
-	    var max$1 = arguments[2];
-	    if (x$1 < min$1) { return min$1 }
-	    if (x$1 > max$1) { return max$1 }
-	    return x$1
-	  }
-	};
-	MathUtil.wrap = function wrap (index, max) {
-	  if (index < 0) {
-	    return max - -index % max
-	  }
-	  return index % max
-	};
-	MathUtil.max = function max () {
-	  if (arguments.length === 3) {
-	    var v1 = arguments[0];
-	    var v2 = arguments[1];
-	    var v3 = arguments[2];
-	    var max = v1;
-	    if (v2 > max) { max = v2; }
-	    if (v3 > max) { max = v3; }
-	    return max
-	  } else if (arguments.length === 4) {
-	    var v1$1 = arguments[0];
-	    var v2$1 = arguments[1];
-	    var v3$1 = arguments[2];
-	    var v4 = arguments[3];
-	    var max$1 = v1$1;
-	    if (v2$1 > max$1) { max$1 = v2$1; }
-	    if (v3$1 > max$1) { max$1 = v3$1; }
-	    if (v4 > max$1) { max$1 = v4; }
-	    return max$1
-	  }
-	};
-	MathUtil.average = function average (x1, x2) {
-	  return (x1 + x2) / 2.0
-	};
-	staticAccessors$5.LOG_10.get = function () { return Math.log(10) };
+	    if (_optstrings) {
+	      var found = _comboData.find(function (o) {
+	        return o.key === tval && o.value;
+	      });
 
-	Object.defineProperties( MathUtil, staticAccessors$5 );
+	      if (found) {
+	        return found.value;
+	      }
+	    }
 
-	var StringBuffer = function StringBuffer (str) {
-	  this.str = str;
-	};
-	StringBuffer.prototype.append = function append (e) {
-	  this.str += e;
-	};
+	    if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
+	      return '';
+	    }
 
-	StringBuffer.prototype.setCharAt = function setCharAt (i, c) {
-	  this.str = this.str.substr(0, i) + c + this.str.substr(i + 1);
-	};
+	    return _snake_case ? unsnake(tval) : tval;
+	  } // Compute the difference between arrays of objects by `value` property
+	  //
+	  // objectDifference([{value:1}, {value:2}, {value:3}], [{value:2}])
+	  // > [{value:1}, {value:3}]
+	  //
 
-	StringBuffer.prototype.toString = function toString (e) {
-	  return this.str
-	};
 
-	var Integer = function Integer (value) {
-	  this.value = value;
-	};
-	Integer.prototype.intValue = function intValue () {
-	  return this.value
-	};
-	Integer.prototype.compareTo = function compareTo (o) {
-	  if (this.value < o) { return -1 }
-	  if (this.value > o) { return 1 }
-	  return 0
-	};
-	Integer.isNaN = function isNaN (n) { return Number.isNaN(n) };
-
-	var Character = function Character () {};
-
-	Character.isWhitespace = function isWhitespace (c) { return ((c <= 32 && c >= 0) || c === 127) };
-	Character.toUpperCase = function toUpperCase (c) { return c.toUpperCase() };
-
-	var DD = function DD () {
-	  this._hi = 0.0;
-	  this._lo = 0.0;
-	  if (arguments.length === 0) {
-	    this.init(0.0);
-	  } else if (arguments.length === 1) {
-	    if (typeof arguments[0] === 'number') {
-	      var x = arguments[0];
-	      this.init(x);
-	    } else if (arguments[0] instanceof DD) {
-	      var dd = arguments[0];
-	      this.init(dd);
-	    } else if (typeof arguments[0] === 'string') {
-	      var str = arguments[0];
-	      DD.call(this, DD.parse(str));
-	    }
-	  } else if (arguments.length === 2) {
-	    var hi = arguments[0];
-	    var lo = arguments[1];
-	    this.init(hi, lo);
+	  function objectDifference(a, b) {
+	    return a.filter(function (d1) {
+	      return !b.some(function (d2) {
+	        return !d2.isMixed && d1.value === d2.value;
+	      });
+	    });
 	  }
-	};
 
-	var staticAccessors$7 = { PI: { configurable: true },TWO_PI: { configurable: true },PI_2: { configurable: true },E: { configurable: true },NaN: { configurable: true },EPS: { configurable: true },SPLIT: { configurable: true },MAX_PRINT_DIGITS: { configurable: true },TEN: { configurable: true },ONE: { configurable: true },SCI_NOT_EXPONENT_CHAR: { configurable: true },SCI_NOT_ZERO: { configurable: true } };
-	DD.prototype.le = function le (y) {
-	  return (this._hi < y._hi || this._hi === y._hi) && this._lo <= y._lo
-	};
-	DD.prototype.extractSignificantDigits = function extractSignificantDigits (insertDecimalPoint, magnitude) {
-	  var y = this.abs();
-	  var mag = DD.magnitude(y._hi);
-	  var scale = DD.TEN.pow(mag);
-	  y = y.divide(scale);
-	  if (y.gt(DD.TEN)) {
-	    y = y.divide(DD.TEN);
-	    mag += 1;
-	  } else if (y.lt(DD.ONE)) {
-	    y = y.multiply(DD.TEN);
-	    mag -= 1;
-	  }
-	  var decimalPointPos = mag + 1;
-	  var buf = new StringBuffer();
-	  var numDigits = DD.MAX_PRINT_DIGITS - 1;
-	  for (var i = 0; i <= numDigits; i++) {
-	    if (insertDecimalPoint && i === decimalPointPos) {
-	      buf.append('.');
-	    }
-	    var digit = Math.trunc(y._hi);
-	    if (digit < 0) {
-	      break
-	    }
-	    var rebiasBy10 = false;
-	    var digitChar = 0;
-	    if (digit > 9) {
-	      rebiasBy10 = true;
-	      digitChar = '9';
-	    } else {
-	      digitChar = '0' + digit;
-	    }
-	    buf.append(digitChar);
-	    y = y.subtract(DD.valueOf(digit)).multiply(DD.TEN);
-	    if (rebiasBy10) { y.selfAdd(DD.TEN); }
-	    var continueExtractingDigits = true;
-	    var remMag = DD.magnitude(y._hi);
-	    if (remMag < 0 && Math.abs(remMag) >= numDigits - i) { continueExtractingDigits = false; }
-	    if (!continueExtractingDigits) { break }
-	  }
-	  magnitude[0] = mag;
-	  return buf.toString()
-	};
-	DD.prototype.sqr = function sqr () {
-	  return this.multiply(this)
-	};
-	DD.prototype.doubleValue = function doubleValue () {
-	  return this._hi + this._lo
-	};
-	DD.prototype.subtract = function subtract () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    return this.add(y.negate())
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    return this.add(-y$1)
-	  }
-	};
-	DD.prototype.equals = function equals () {
-	  if (arguments.length === 1) {
-	    var y = arguments[0];
-	    return this._hi === y._hi && this._lo === y._lo
-	  }
-	};
-	DD.prototype.isZero = function isZero () {
-	  return this._hi === 0.0 && this._lo === 0.0
-	};
-	DD.prototype.selfSubtract = function selfSubtract () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    if (this.isNaN()) { return this }
-	    return this.selfAdd(-y._hi, -y._lo)
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    if (this.isNaN()) { return this }
-	    return this.selfAdd(-y$1, 0.0)
-	  }
-	};
-	DD.prototype.getSpecialNumberString = function getSpecialNumberString () {
-	  if (this.isZero()) { return '0.0' }
-	  if (this.isNaN()) { return 'NaN ' }
-	  return null
-	};
-	DD.prototype.min = function min (x) {
-	  if (this.le(x)) {
-	    return this
-	  } else {
-	    return x
-	  }
-	};
-	DD.prototype.selfDivide = function selfDivide () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof DD) {
-	      var y = arguments[0];
-	      return this.selfDivide(y._hi, y._lo)
-	    } else if (typeof arguments[0] === 'number') {
-	      var y$1 = arguments[0];
-	      return this.selfDivide(y$1, 0.0)
-	    }
-	  } else if (arguments.length === 2) {
-	    var yhi = arguments[0];
-	    var ylo = arguments[1];
-	    var hc = null;
-	    var tc = null;
-	    var hy = null;
-	    var ty = null;
-	    var C = null;
-	    var c = null;
-	    var U = null;
-	    var u = null;
-	    C = this._hi / yhi;
-	    c = DD.SPLIT * C;
-	    hc = c - C;
-	    u = DD.SPLIT * yhi;
-	    hc = c - hc;
-	    tc = C - hc;
-	    hy = u - yhi;
-	    U = C * yhi;
-	    hy = u - hy;
-	    ty = yhi - hy;
-	    u = hc * hy - U + hc * ty + tc * hy + tc * ty;
-	    c = (this._hi - U - u + this._lo - C * ylo) / yhi;
-	    u = C + c;
-	    this._hi = u;
-	    this._lo = C - u + c;
-	    return this
-	  }
-	};
-	DD.prototype.dump = function dump () {
-	  return 'DD<' + this._hi + ', ' + this._lo + '>'
-	};
-	DD.prototype.divide = function divide () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    var hc = null;
-	    var tc = null;
-	    var hy = null;
-	    var ty = null;
-	    var C = null;
-	    var c = null;
-	    var U = null;
-	    var u = null;
-	    C = this._hi / y._hi;
-	    c = DD.SPLIT * C;
-	    hc = c - C;
-	    u = DD.SPLIT * y._hi;
-	    hc = c - hc;
-	    tc = C - hc;
-	    hy = u - y._hi;
-	    U = C * y._hi;
-	    hy = u - hy;
-	    ty = y._hi - hy;
-	    u = hc * hy - U + hc * ty + tc * hy + tc * ty;
-	    c = (this._hi - U - u + this._lo - C * y._lo) / y._hi;
-	    u = C + c;
-	    var zhi = u;
-	    var zlo = C - u + c;
-	    return new DD(zhi, zlo)
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    if (Double.isNaN(y$1)) { return DD.createNaN() }
-	    return DD.copy(this).selfDivide(y$1, 0.0)
-	  }
-	};
-	DD.prototype.ge = function ge (y) {
-	  return (this._hi > y._hi || this._hi === y._hi) && this._lo >= y._lo
-	};
-	DD.prototype.pow = function pow (exp) {
-	  if (exp === 0.0) { return DD.valueOf(1.0) }
-	  var r = new DD(this);
-	  var s = DD.valueOf(1.0);
-	  var n = Math.abs(exp);
-	  if (n > 1) {
-	    while (n > 0) {
-	      if (n % 2 === 1) {
-	        s.selfMultiply(r);
-	      }
-	      n /= 2;
-	      if (n > 0) { r = r.sqr(); }
-	    }
-	  } else {
-	    s = r;
-	  }
-	  if (exp < 0) { return s.reciprocal() }
-	  return s
-	};
-	DD.prototype.ceil = function ceil () {
-	  if (this.isNaN()) { return DD.NaN }
-	  var fhi = Math.ceil(this._hi);
-	  var flo = 0.0;
-	  if (fhi === this._hi) {
-	    flo = Math.ceil(this._lo);
-	  }
-	  return new DD(fhi, flo)
-	};
-	DD.prototype.compareTo = function compareTo (o) {
-	  var other = o;
-	  if (this._hi < other._hi) { return -1 }
-	  if (this._hi > other._hi) { return 1 }
-	  if (this._lo < other._lo) { return -1 }
-	  if (this._lo > other._lo) { return 1 }
-	  return 0
-	};
-	DD.prototype.rint = function rint () {
-	  if (this.isNaN()) { return this }
-	  var plus5 = this.add(0.5);
-	  return plus5.floor()
-	};
-	DD.prototype.setValue = function setValue () {
-	  if (arguments[0] instanceof DD) {
-	    var value = arguments[0];
-	    this.init(value);
-	    return this
-	  } else if (typeof arguments[0] === 'number') {
-	    var value$1 = arguments[0];
-	    this.init(value$1);
-	    return this
-	  }
-	};
-	DD.prototype.max = function max (x) {
-	  if (this.ge(x)) {
-	    return this
-	  } else {
-	    return x
-	  }
-	};
-	DD.prototype.sqrt = function sqrt () {
-	  if (this.isZero()) { return DD.valueOf(0.0) }
-	  if (this.isNegative()) {
-	    return DD.NaN
-	  }
-	  var x = 1.0 / Math.sqrt(this._hi);
-	  var ax = this._hi * x;
-	  var axdd = DD.valueOf(ax);
-	  var diffSq = this.subtract(axdd.sqr());
-	  var d2 = diffSq._hi * (x * 0.5);
-	  return axdd.add(d2)
-	};
-	DD.prototype.selfAdd = function selfAdd () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof DD) {
-	      var y = arguments[0];
-	      return this.selfAdd(y._hi, y._lo)
-	    } else if (typeof arguments[0] === 'number') {
-	      var y$1 = arguments[0];
-	      var H = null;
-	      var h = null;
-	      var S = null;
-	      var s = null;
-	      var e = null;
-	      var f = null;
-	      S = this._hi + y$1;
-	      e = S - this._hi;
-	      s = S - e;
-	      s = y$1 - e + (this._hi - s);
-	      f = s + this._lo;
-	      H = S + f;
-	      h = f + (S - H);
-	      this._hi = H + h;
-	      this._lo = h + (H - this._hi);
-	      return this
-	    }
-	  } else if (arguments.length === 2) {
-	    var yhi = arguments[0];
-	    var ylo = arguments[1];
-	    var H$1 = null;
-	    var h$1 = null;
-	    var T = null;
-	    var t = null;
-	    var S$1 = null;
-	    var s$1 = null;
-	    var e$1 = null;
-	    var f$1 = null;
-	    S$1 = this._hi + yhi;
-	    T = this._lo + ylo;
-	    e$1 = S$1 - this._hi;
-	    f$1 = T - this._lo;
-	    s$1 = S$1 - e$1;
-	    t = T - f$1;
-	    s$1 = yhi - e$1 + (this._hi - s$1);
-	    t = ylo - f$1 + (this._lo - t);
-	    e$1 = s$1 + T;
-	    H$1 = S$1 + e$1;
-	    h$1 = e$1 + (S$1 - H$1);
-	    e$1 = t + h$1;
-	    var zhi = H$1 + e$1;
-	    var zlo = e$1 + (H$1 - zhi);
-	    this._hi = zhi;
-	    this._lo = zlo;
-	    return this
-	  }
-	};
-	DD.prototype.selfMultiply = function selfMultiply () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof DD) {
-	      var y = arguments[0];
-	      return this.selfMultiply(y._hi, y._lo)
-	    } else if (typeof arguments[0] === 'number') {
-	      var y$1 = arguments[0];
-	      return this.selfMultiply(y$1, 0.0)
-	    }
-	  } else if (arguments.length === 2) {
-	    var yhi = arguments[0];
-	    var ylo = arguments[1];
-	    var hx = null;
-	    var tx = null;
-	    var hy = null;
-	    var ty = null;
-	    var C = null;
-	    var c = null;
-	    C = DD.SPLIT * this._hi;
-	    hx = C - this._hi;
-	    c = DD.SPLIT * yhi;
-	    hx = C - hx;
-	    tx = this._hi - hx;
-	    hy = c - yhi;
-	    C = this._hi * yhi;
-	    hy = c - hy;
-	    ty = yhi - hy;
-	    c = hx * hy - C + hx * ty + tx * hy + tx * ty + (this._hi * ylo + this._lo * yhi);
-	    var zhi = C + c;
-	    hx = C - zhi;
-	    var zlo = c + hx;
-	    this._hi = zhi;
-	    this._lo = zlo;
-	    return this
-	  }
-	};
-	DD.prototype.selfSqr = function selfSqr () {
-	  return this.selfMultiply(this)
-	};
-	DD.prototype.floor = function floor () {
-	  if (this.isNaN()) { return DD.NaN }
-	  var fhi = Math.floor(this._hi);
-	  var flo = 0.0;
-	  if (fhi === this._hi) {
-	    flo = Math.floor(this._lo);
-	  }
-	  return new DD(fhi, flo)
-	};
-	DD.prototype.negate = function negate () {
-	  if (this.isNaN()) { return this }
-	  return new DD(-this._hi, -this._lo)
-	};
-	DD.prototype.clone = function clone () {
-	  // try {
-	  // return null
-	  // } catch (ex) {
-	  // if (ex instanceof CloneNotSupportedException) {
-	  //   return null
-	  // } else throw ex
-	  // } finally {}
-	};
-	DD.prototype.multiply = function multiply () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    if (y.isNaN()) { return DD.createNaN() }
-	    return DD.copy(this).selfMultiply(y)
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    if (Double.isNaN(y$1)) { return DD.createNaN() }
-	    return DD.copy(this).selfMultiply(y$1, 0.0)
-	  }
-	};
-	DD.prototype.isNaN = function isNaN () {
-	  return Double.isNaN(this._hi)
-	};
-	DD.prototype.intValue = function intValue () {
-	  return Math.trunc(this._hi)
-	};
-	DD.prototype.toString = function toString () {
-	  var mag = DD.magnitude(this._hi);
-	  if (mag >= -3 && mag <= 20) { return this.toStandardNotation() }
-	  return this.toSciNotation()
-	};
-	DD.prototype.toStandardNotation = function toStandardNotation () {
-	  var specialStr = this.getSpecialNumberString();
-	  if (specialStr !== null) { return specialStr }
-	  var magnitude = new Array(1).fill(null);
-	  var sigDigits = this.extractSignificantDigits(true, magnitude);
-	  var decimalPointPos = magnitude[0] + 1;
-	  var num = sigDigits;
-	  if (sigDigits.charAt(0) === '.') {
-	    num = '0' + sigDigits;
-	  } else if (decimalPointPos < 0) {
-	    num = '0.' + DD.stringOfChar('0', -decimalPointPos) + sigDigits;
-	  } else if (sigDigits.indexOf('.') === -1) {
-	    var numZeroes = decimalPointPos - sigDigits.length;
-	    var zeroes = DD.stringOfChar('0', numZeroes);
-	    num = sigDigits + zeroes + '.0';
-	  }
-	  if (this.isNegative()) { return '-' + num }
-	  return num
-	};
-	DD.prototype.reciprocal = function reciprocal () {
-	  var hc = null;
-	  var tc = null;
-	  var hy = null;
-	  var ty = null;
-	  var C = null;
-	  var c = null;
-	  var U = null;
-	  var u = null;
-	  C = 1.0 / this._hi;
-	  c = DD.SPLIT * C;
-	  hc = c - C;
-	  u = DD.SPLIT * this._hi;
-	  hc = c - hc;
-	  tc = C - hc;
-	  hy = u - this._hi;
-	  U = C * this._hi;
-	  hy = u - hy;
-	  ty = this._hi - hy;
-	  u = hc * hy - U + hc * ty + tc * hy + tc * ty;
-	  c = (1.0 - U - u - C * this._lo) / this._hi;
-	  var zhi = C + c;
-	  var zlo = C - zhi + c;
-	  return new DD(zhi, zlo)
-	};
-	DD.prototype.toSciNotation = function toSciNotation () {
-	  if (this.isZero()) { return DD.SCI_NOT_ZERO }
-	  var specialStr = this.getSpecialNumberString();
-	  if (specialStr !== null) { return specialStr }
-	  var magnitude = new Array(1).fill(null);
-	  var digits = this.extractSignificantDigits(false, magnitude);
-	  var expStr = DD.SCI_NOT_EXPONENT_CHAR + magnitude[0];
-	  if (digits.charAt(0) === '0') {
-	    throw new Error('Found leading zero: ' + digits)
-	  }
-	  var trailingDigits = '';
-	  if (digits.length > 1) { trailingDigits = digits.substring(1); }
-	  var digitsWithDecimal = digits.charAt(0) + '.' + trailingDigits;
-	  if (this.isNegative()) { return '-' + digitsWithDecimal + expStr }
-	  return digitsWithDecimal + expStr
-	};
-	DD.prototype.abs = function abs () {
-	  if (this.isNaN()) { return DD.NaN }
-	  if (this.isNegative()) { return this.negate() }
-	  return new DD(this)
-	};
-	DD.prototype.isPositive = function isPositive () {
-	  return (this._hi > 0.0 || this._hi === 0.0) && this._lo > 0.0
-	};
-	DD.prototype.lt = function lt (y) {
-	  return (this._hi < y._hi || this._hi === y._hi) && this._lo < y._lo
-	};
-	DD.prototype.add = function add () {
-	  if (arguments[0] instanceof DD) {
-	    var y = arguments[0];
-	    return DD.copy(this).selfAdd(y)
-	  } else if (typeof arguments[0] === 'number') {
-	    var y$1 = arguments[0];
-	    return DD.copy(this).selfAdd(y$1)
-	  }
-	};
-	DD.prototype.init = function init () {
-	  if (arguments.length === 1) {
-	    if (typeof arguments[0] === 'number') {
-	      var x = arguments[0];
-	      this._hi = x;
-	      this._lo = 0.0;
-	    } else if (arguments[0] instanceof DD) {
-	      var dd = arguments[0];
-	      this._hi = dd._hi;
-	      this._lo = dd._lo;
-	    }
-	  } else if (arguments.length === 2) {
-	    var hi = arguments[0];
-	    var lo = arguments[1];
-	    this._hi = hi;
-	    this._lo = lo;
-	  }
-	};
-	DD.prototype.gt = function gt (y) {
-	  return (this._hi > y._hi || this._hi === y._hi) && this._lo > y._lo
-	};
-	DD.prototype.isNegative = function isNegative () {
-	  return (this._hi < 0.0 || this._hi === 0.0) && this._lo < 0.0
-	};
-	DD.prototype.trunc = function trunc () {
-	  if (this.isNaN()) { return DD.NaN }
-	  if (this.isPositive()) { return this.floor(); } else { return this.ceil() }
-	};
-	DD.prototype.signum = function signum () {
-	  if (this._hi > 0) { return 1 }
-	  if (this._hi < 0) { return -1 }
-	  if (this._lo > 0) { return 1 }
-	  if (this._lo < 0) { return -1 }
-	  return 0
-	};
-	DD.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable, Comparable, Clonable]
-	};
-	DD.prototype.getClass = function getClass () {
-	  return DD
-	};
-	DD.sqr = function sqr (x) {
-	  return DD.valueOf(x).selfMultiply(x)
-	};
-	DD.valueOf = function valueOf () {
-	  if (typeof arguments[0] === 'string') {
-	    var str = arguments[0];
-	    return DD.parse(str)
-	  } else if (typeof arguments[0] === 'number') {
-	    var x = arguments[0];
-	    return new DD(x)
-	  }
-	};
-	DD.sqrt = function sqrt (x) {
-	  return DD.valueOf(x).sqrt()
-	};
-	DD.parse = function parse (str) {
-	  var i = 0;
-	  var strlen = str.length;
-	  while (Character.isWhitespace(str.charAt(i))) { i++; }
-	  var isNegative = false;
-	  if (i < strlen) {
-	    var signCh = str.charAt(i);
-	    if (signCh === '-' || signCh === '+') {
-	      i++;
-	      if (signCh === '-') { isNegative = true; }
+	  function initCombo(selection, attachTo) {
+	    if (_optstrings) {
+	      selection.attr('readonly', 'readonly');
+	      selection.call(_combobox, attachTo);
+	      setStaticValues(setPlaceholder);
+	    } else if (_optarray) {
+	      selection.call(_combobox, attachTo);
+	      setStaticValues(setPlaceholder);
+	    } else if (services.taginfo) {
+	      selection.call(_combobox.fetcher(setTaginfoValues), attachTo);
+	      setTaginfoValues('', setPlaceholder);
 	    }
 	  }
-	  var val = new DD();
-	  var numDigits = 0;
-	  var numBeforeDec = 0;
-	  var exp = 0;
-	  while (true) {
-	    if (i >= strlen) { break }
-	    var ch = str.charAt(i);
-	    i++;
-	    if (Character.isDigit(ch)) {
-	      var d = ch - '0';
-	      val.selfMultiply(DD.TEN);
-	      val.selfAdd(d);
-	      numDigits++;
-	      continue
-	    }
-	    if (ch === '.') {
-	      numBeforeDec = numDigits;
-	      continue
-	    }
-	    if (ch === 'e' || ch === 'E') {
-	      var expStr = str.substring(i);
-	      try {
-	        exp = Integer.parseInt(expStr);
-	      } catch (ex) {
-	        if (ex instanceof Error) {
-	          throw new Error('Invalid exponent ' + expStr + ' in string ' + str)
-	        } else { throw ex }
-	      } finally {}
-	      break
-	    }
-	    throw new Error("Unexpected character '" + ch + "' at position " + i + ' in string ' + str)
-	  }
-	  var val2 = val;
-	  var numDecPlaces = numDigits - numBeforeDec - exp;
-	  if (numDecPlaces === 0) {
-	    val2 = val;
-	  } else if (numDecPlaces > 0) {
-	    var scale = DD.TEN.pow(numDecPlaces);
-	    val2 = val.divide(scale);
-	  } else if (numDecPlaces < 0) {
-	    var scale$1 = DD.TEN.pow(-numDecPlaces);
-	    val2 = val.multiply(scale$1);
-	  }
-	  if (isNegative) {
-	    return val2.negate()
-	  }
-	  return val2
-	};
-	DD.createNaN = function createNaN () {
-	  return new DD(Double.NaN, Double.NaN)
-	};
-	DD.copy = function copy (dd) {
-	  return new DD(dd)
-	};
-	DD.magnitude = function magnitude (x) {
-	  var xAbs = Math.abs(x);
-	  var xLog10 = Math.log(xAbs) / Math.log(10);
-	  var xMag = Math.trunc(Math.floor(xLog10));
-	  var xApprox = Math.pow(10, xMag);
-	  if (xApprox * 10 <= xAbs) { xMag += 1; }
-	  return xMag
-	};
-	DD.stringOfChar = function stringOfChar (ch, len) {
-	  var buf = new StringBuffer();
-	  for (var i = 0; i < len; i++) {
-	    buf.append(ch);
-	  }
-	  return buf.toString()
-	};
-	staticAccessors$7.PI.get = function () { return new DD(3.141592653589793116e+00, 1.224646799147353207e-16) };
-	staticAccessors$7.TWO_PI.get = function () { return new DD(6.283185307179586232e+00, 2.449293598294706414e-16) };
-	staticAccessors$7.PI_2.get = function () { return new DD(1.570796326794896558e+00, 6.123233995736766036e-17) };
-	staticAccessors$7.E.get = function () { return new DD(2.718281828459045091e+00, 1.445646891729250158e-16) };
-	staticAccessors$7.NaN.get = function () { return new DD(Double.NaN, Double.NaN) };
-	staticAccessors$7.EPS.get = function () { return 1.23259516440783e-32 };
-	staticAccessors$7.SPLIT.get = function () { return 134217729.0 };
-	staticAccessors$7.MAX_PRINT_DIGITS.get = function () { return 32 };
-	staticAccessors$7.TEN.get = function () { return DD.valueOf(10.0) };
-	staticAccessors$7.ONE.get = function () { return DD.valueOf(1.0) };
-	staticAccessors$7.SCI_NOT_EXPONENT_CHAR.get = function () { return 'E' };
-	staticAccessors$7.SCI_NOT_ZERO.get = function () { return '0.0E0' };
-
-	Object.defineProperties( DD, staticAccessors$7 );
-
-	var CGAlgorithmsDD = function CGAlgorithmsDD () {};
-
-	var staticAccessors$6 = { DP_SAFE_EPSILON: { configurable: true } };
-
-	CGAlgorithmsDD.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CGAlgorithmsDD.prototype.getClass = function getClass () {
-	  return CGAlgorithmsDD
-	};
-	CGAlgorithmsDD.orientationIndex = function orientationIndex (p1, p2, q) {
-	  var index = CGAlgorithmsDD.orientationIndexFilter(p1, p2, q);
-	  if (index <= 1) { return index }
-	  var dx1 = DD.valueOf(p2.x).selfAdd(-p1.x);
-	  var dy1 = DD.valueOf(p2.y).selfAdd(-p1.y);
-	  var dx2 = DD.valueOf(q.x).selfAdd(-p2.x);
-	  var dy2 = DD.valueOf(q.y).selfAdd(-p2.y);
-	  return dx1.selfMultiply(dy2).selfSubtract(dy1.selfMultiply(dx2)).signum()
-	};
-	CGAlgorithmsDD.signOfDet2x2 = function signOfDet2x2 (x1, y1, x2, y2) {
-	  var det = x1.multiply(y2).selfSubtract(y1.multiply(x2));
-	  return det.signum()
-	};
-	CGAlgorithmsDD.intersection = function intersection (p1, p2, q1, q2) {
-	  var denom1 = DD.valueOf(q2.y).selfSubtract(q1.y).selfMultiply(DD.valueOf(p2.x).selfSubtract(p1.x));
-	  var denom2 = DD.valueOf(q2.x).selfSubtract(q1.x).selfMultiply(DD.valueOf(p2.y).selfSubtract(p1.y));
-	  var denom = denom1.subtract(denom2);
-	  var numx1 = DD.valueOf(q2.x).selfSubtract(q1.x).selfMultiply(DD.valueOf(p1.y).selfSubtract(q1.y));
-	  var numx2 = DD.valueOf(q2.y).selfSubtract(q1.y).selfMultiply(DD.valueOf(p1.x).selfSubtract(q1.x));
-	  var numx = numx1.subtract(numx2);
-	  var fracP = numx.selfDivide(denom).doubleValue();
-	  var x = DD.valueOf(p1.x).selfAdd(DD.valueOf(p2.x).selfSubtract(p1.x).selfMultiply(fracP)).doubleValue();
-	  var numy1 = DD.valueOf(p2.x).selfSubtract(p1.x).selfMultiply(DD.valueOf(p1.y).selfSubtract(q1.y));
-	  var numy2 = DD.valueOf(p2.y).selfSubtract(p1.y).selfMultiply(DD.valueOf(p1.x).selfSubtract(q1.x));
-	  var numy = numy1.subtract(numy2);
-	  var fracQ = numy.selfDivide(denom).doubleValue();
-	  var y = DD.valueOf(q1.y).selfAdd(DD.valueOf(q2.y).selfSubtract(q1.y).selfMultiply(fracQ)).doubleValue();
-	  return new Coordinate(x, y)
-	};
-	CGAlgorithmsDD.orientationIndexFilter = function orientationIndexFilter (pa, pb, pc) {
-	  var detsum = null;
-	  var detleft = (pa.x - pc.x) * (pb.y - pc.y);
-	  var detright = (pa.y - pc.y) * (pb.x - pc.x);
-	  var det = detleft - detright;
-	  if (detleft > 0.0) {
-	    if (detright <= 0.0) {
-	      return CGAlgorithmsDD.signum(det)
-	    } else {
-	      detsum = detleft + detright;
-	    }
-	  } else if (detleft < 0.0) {
-	    if (detright >= 0.0) {
-	      return CGAlgorithmsDD.signum(det)
-	    } else {
-	      detsum = -detleft - detright;
-	    }
-	  } else {
-	    return CGAlgorithmsDD.signum(det)
-	  }
-	  var errbound = CGAlgorithmsDD.DP_SAFE_EPSILON * detsum;
-	  if (det >= errbound || -det >= errbound) {
-	    return CGAlgorithmsDD.signum(det)
+
+	  function setStaticValues(callback) {
+	    if (!(_optstrings || _optarray)) return;
+
+	    if (_optstrings) {
+	      _comboData = Object.keys(_optstrings).map(function (k) {
+	        var v = field.t('options.' + k, {
+	          'default': _optstrings[k]
+	        });
+	        return {
+	          key: k,
+	          value: v,
+	          title: v,
+	          display: field.t.html('options.' + k, {
+	            'default': _optstrings[k]
+	          })
+	        };
+	      });
+	    } else if (_optarray) {
+	      _comboData = _optarray.map(function (k) {
+	        var v = _snake_case ? unsnake(k) : k;
+	        return {
+	          key: k,
+	          value: v,
+	          title: v
+	        };
+	      });
+	    }
+
+	    _combobox.data(objectDifference(_comboData, _multiData));
+
+	    if (callback) callback(_comboData);
 	  }
-	  return 2
-	};
-	CGAlgorithmsDD.signum = function signum (x) {
-	  if (x > 0) { return 1 }
-	  if (x < 0) { return -1 }
-	  return 0
-	};
-	staticAccessors$6.DP_SAFE_EPSILON.get = function () { return 1e-15 };
-
-	Object.defineProperties( CGAlgorithmsDD, staticAccessors$6 );
-
-	var CoordinateSequence = function CoordinateSequence () {};
-
-	var staticAccessors$8 = { X: { configurable: true },Y: { configurable: true },Z: { configurable: true },M: { configurable: true } };
-
-	staticAccessors$8.X.get = function () { return 0 };
-	staticAccessors$8.Y.get = function () { return 1 };
-	staticAccessors$8.Z.get = function () { return 2 };
-	staticAccessors$8.M.get = function () { return 3 };
-	CoordinateSequence.prototype.setOrdinate = function setOrdinate (index, ordinateIndex, value) {};
-	CoordinateSequence.prototype.size = function size () {};
-	CoordinateSequence.prototype.getOrdinate = function getOrdinate (index, ordinateIndex) {};
-	CoordinateSequence.prototype.getCoordinate = function getCoordinate () {};
-	CoordinateSequence.prototype.getCoordinateCopy = function getCoordinateCopy (i) {};
-	CoordinateSequence.prototype.getDimension = function getDimension () {};
-	CoordinateSequence.prototype.getX = function getX (index) {};
-	CoordinateSequence.prototype.clone = function clone () {};
-	CoordinateSequence.prototype.expandEnvelope = function expandEnvelope (env) {};
-	CoordinateSequence.prototype.copy = function copy () {};
-	CoordinateSequence.prototype.getY = function getY (index) {};
-	CoordinateSequence.prototype.toCoordinateArray = function toCoordinateArray () {};
-	CoordinateSequence.prototype.interfaces_ = function interfaces_ () {
-	  return [Clonable]
-	};
-	CoordinateSequence.prototype.getClass = function getClass () {
-	  return CoordinateSequence
-	};
 
-	Object.defineProperties( CoordinateSequence, staticAccessors$8 );
+	  function setTaginfoValues(q, callback) {
+	    var fn = _isMulti ? 'multikeys' : 'values';
+	    var query = (_isMulti ? field.key : '') + q;
+	    var hasCountryPrefix = _isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;
 
-	var Exception = function Exception () {};
+	    if (hasCountryPrefix) {
+	      query = _countryCode + ':';
+	    }
 
-	var NotRepresentableException = (function (Exception$$1) {
-	  function NotRepresentableException () {
-	    Exception$$1.call(this, 'Projective point not representable on the Cartesian plane.');
-	  }
+	    var params = {
+	      debounce: q !== '',
+	      key: field.key,
+	      query: query
+	    };
 
-	  if ( Exception$$1 ) { NotRepresentableException.__proto__ = Exception$$1; }
-	  NotRepresentableException.prototype = Object.create( Exception$$1 && Exception$$1.prototype );
-	  NotRepresentableException.prototype.constructor = NotRepresentableException;
-	  NotRepresentableException.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  NotRepresentableException.prototype.getClass = function getClass () {
-	    return NotRepresentableException
-	  };
+	    if (_entityIDs.length) {
+	      params.geometry = context.graph().geometry(_entityIDs[0]);
+	    }
 
-	  return NotRepresentableException;
-	}(Exception));
+	    services.taginfo[fn](params, function (err, data) {
+	      if (err) return;
+	      data = data.filter(function (d) {
+	        if (field.type === 'typeCombo' && d.value === 'yes') {
+	          // don't show the fallback value
+	          return false;
+	        } // don't show values with very low usage
 
-	var System = function System () {};
 
-	System.arraycopy = function arraycopy (src, srcPos, dest, destPos, len) {
-	  var c = 0;
-	  for (var i = srcPos; i < srcPos + len; i++) {
-	    dest[destPos + c] = src[i];
-	    c++;
-	  }
-	};
+	        return !d.count || d.count > 10;
+	      });
+	      var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
 
-	System.getProperty = function getProperty (name) {
-	  return {
-	    'line.separator': '\n'
-	  }[name]
-	};
+	      if (deprecatedValues) {
+	        // don't suggest deprecated tag values
+	        data = data.filter(function (d) {
+	          return deprecatedValues.indexOf(d.value) === -1;
+	        });
+	      }
 
-	var HCoordinate = function HCoordinate () {
-	  this.x = null;
-	  this.y = null;
-	  this.w = null;
-	  if (arguments.length === 0) {
-	    this.x = 0.0;
-	    this.y = 0.0;
-	    this.w = 1.0;
-	  } else if (arguments.length === 1) {
-	    var p = arguments[0];
-	    this.x = p.x;
-	    this.y = p.y;
-	    this.w = 1.0;
-	  } else if (arguments.length === 2) {
-	    if (typeof arguments[0] === 'number' && typeof arguments[1] === 'number') {
-	      var _x = arguments[0];
-	      var _y = arguments[1];
-	      this.x = _x;
-	      this.y = _y;
-	      this.w = 1.0;
-	    } else if (arguments[0] instanceof HCoordinate && arguments[1] instanceof HCoordinate) {
-	      var p1 = arguments[0];
-	      var p2 = arguments[1];
-	      this.x = p1.y * p2.w - p2.y * p1.w;
-	      this.y = p2.x * p1.w - p1.x * p2.w;
-	      this.w = p1.x * p2.y - p2.x * p1.y;
-	    } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Coordinate) {
-	      var p1$1 = arguments[0];
-	      var p2$1 = arguments[1];
-	      this.x = p1$1.y - p2$1.y;
-	      this.y = p2$1.x - p1$1.x;
-	      this.w = p1$1.x * p2$1.y - p2$1.x * p1$1.y;
-	    }
-	  } else if (arguments.length === 3) {
-	    var _x$1 = arguments[0];
-	    var _y$1 = arguments[1];
-	    var _w = arguments[2];
-	    this.x = _x$1;
-	    this.y = _y$1;
-	    this.w = _w;
-	  } else if (arguments.length === 4) {
-	    var p1$2 = arguments[0];
-	    var p2$2 = arguments[1];
-	    var q1 = arguments[2];
-	    var q2 = arguments[3];
-	    var px = p1$2.y - p2$2.y;
-	    var py = p2$2.x - p1$2.x;
-	    var pw = p1$2.x * p2$2.y - p2$2.x * p1$2.y;
-	    var qx = q1.y - q2.y;
-	    var qy = q2.x - q1.x;
-	    var qw = q1.x * q2.y - q2.x * q1.y;
-	    this.x = py * qw - qy * pw;
-	    this.y = qx * pw - px * qw;
-	    this.w = px * qy - qx * py;
-	  }
-	};
-	HCoordinate.prototype.getY = function getY () {
-	  var a = this.y / this.w;
-	  if (Double.isNaN(a) || Double.isInfinite(a)) {
-	    throw new NotRepresentableException()
-	  }
-	  return a
-	};
-	HCoordinate.prototype.getX = function getX () {
-	  var a = this.x / this.w;
-	  if (Double.isNaN(a) || Double.isInfinite(a)) {
-	    throw new NotRepresentableException()
-	  }
-	  return a
-	};
-	HCoordinate.prototype.getCoordinate = function getCoordinate () {
-	  var p = new Coordinate();
-	  p.x = this.getX();
-	  p.y = this.getY();
-	  return p
-	};
-	HCoordinate.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	HCoordinate.prototype.getClass = function getClass () {
-	  return HCoordinate
-	};
-	HCoordinate.intersection = function intersection (p1, p2, q1, q2) {
-	  var px = p1.y - p2.y;
-	  var py = p2.x - p1.x;
-	  var pw = p1.x * p2.y - p2.x * p1.y;
-	  var qx = q1.y - q2.y;
-	  var qy = q2.x - q1.x;
-	  var qw = q1.x * q2.y - q2.x * q1.y;
-	  var x = py * qw - qy * pw;
-	  var y = qx * pw - px * qw;
-	  var w = px * qy - qx * py;
-	  var xInt = x / w;
-	  var yInt = y / w;
-	  if (Double.isNaN(xInt) || (Double.isInfinite(xInt) || Double.isNaN(yInt)) || Double.isInfinite(yInt)) {
-	    throw new NotRepresentableException()
-	  }
-	  return new Coordinate(xInt, yInt)
-	};
+	      if (hasCountryPrefix) {
+	        data = data.filter(function (d) {
+	          return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
+	        });
+	      } // hide the caret if there are no suggestions
 
-	var Envelope = function Envelope () {
-	  this._minx = null;
-	  this._maxx = null;
-	  this._miny = null;
-	  this._maxy = null;
-	  if (arguments.length === 0) {
-	    this.init();
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      this.init(p.x, p.x, p.y, p.y);
-	    } else if (arguments[0] instanceof Envelope) {
-	      var env = arguments[0];
-	      this.init(env);
-	    }
-	  } else if (arguments.length === 2) {
-	    var p1 = arguments[0];
-	    var p2 = arguments[1];
-	    this.init(p1.x, p2.x, p1.y, p2.y);
-	  } else if (arguments.length === 4) {
-	    var x1 = arguments[0];
-	    var x2 = arguments[1];
-	    var y1 = arguments[2];
-	    var y2 = arguments[3];
-	    this.init(x1, x2, y1, y2);
-	  }
-	};
 
-	var staticAccessors$9 = { serialVersionUID: { configurable: true } };
-	Envelope.prototype.getArea = function getArea () {
-	  return this.getWidth() * this.getHeight()
-	};
-	Envelope.prototype.equals = function equals (other) {
-	  if (!(other instanceof Envelope)) {
-	    return false
-	  }
-	  var otherEnvelope = other;
-	  if (this.isNull()) {
-	    return otherEnvelope.isNull()
-	  }
-	  return this._maxx === otherEnvelope.getMaxX() && this._maxy === otherEnvelope.getMaxY() && this._minx === otherEnvelope.getMinX() && this._miny === otherEnvelope.getMinY()
-	};
-	Envelope.prototype.intersection = function intersection (env) {
-	  if (this.isNull() || env.isNull() || !this.intersects(env)) { return new Envelope() }
-	  var intMinX = this._minx > env._minx ? this._minx : env._minx;
-	  var intMinY = this._miny > env._miny ? this._miny : env._miny;
-	  var intMaxX = this._maxx < env._maxx ? this._maxx : env._maxx;
-	  var intMaxY = this._maxy < env._maxy ? this._maxy : env._maxy;
-	  return new Envelope(intMinX, intMaxX, intMinY, intMaxY)
-	};
-	Envelope.prototype.isNull = function isNull () {
-	  return this._maxx < this._minx
-	};
-	Envelope.prototype.getMaxX = function getMaxX () {
-	  return this._maxx
-	};
-	Envelope.prototype.covers = function covers () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      return this.covers(p.x, p.y)
-	    } else if (arguments[0] instanceof Envelope) {
-	      var other = arguments[0];
-	      if (this.isNull() || other.isNull()) {
-	        return false
-	      }
-	      return other.getMinX() >= this._minx && other.getMaxX() <= this._maxx && other.getMinY() >= this._miny && other.getMaxY() <= this._maxy
-	    }
-	  } else if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var y = arguments[1];
-	    if (this.isNull()) { return false }
-	    return x >= this._minx && x <= this._maxx && y >= this._miny && y <= this._maxy
-	  }
-	};
-	Envelope.prototype.intersects = function intersects () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Envelope) {
-	      var other = arguments[0];
-	      if (this.isNull() || other.isNull()) {
-	        return false
-	      }
-	      return !(other._minx > this._maxx || other._maxx < this._minx || other._miny > this._maxy || other._maxy < this._miny)
-	    } else if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      return this.intersects(p.x, p.y)
-	    }
-	  } else if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var y = arguments[1];
-	    if (this.isNull()) { return false }
-	    return !(x > this._maxx || x < this._minx || y > this._maxy || y < this._miny)
+	      _container.classed('empty-combobox', data.length === 0);
+
+	      _comboData = data.map(function (d) {
+	        var k = d.value;
+	        if (_isMulti) k = k.replace(field.key, '');
+	        var v = _snake_case ? unsnake(k) : k;
+	        return {
+	          key: k,
+	          value: v,
+	          title: _isMulti ? v : d.title
+	        };
+	      });
+	      _comboData = objectDifference(_comboData, _multiData);
+	      if (callback) callback(_comboData);
+	    });
 	  }
-	};
-	Envelope.prototype.getMinY = function getMinY () {
-	  return this._miny
-	};
-	Envelope.prototype.getMinX = function getMinX () {
-	  return this._minx
-	};
-	Envelope.prototype.expandToInclude = function expandToInclude () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      this.expandToInclude(p.x, p.y);
-	    } else if (arguments[0] instanceof Envelope) {
-	      var other = arguments[0];
-	      if (other.isNull()) {
-	        return null
-	      }
-	      if (this.isNull()) {
-	        this._minx = other.getMinX();
-	        this._maxx = other.getMaxX();
-	        this._miny = other.getMinY();
-	        this._maxy = other.getMaxY();
-	      } else {
-	        if (other._minx < this._minx) {
-	          this._minx = other._minx;
-	        }
-	        if (other._maxx > this._maxx) {
-	          this._maxx = other._maxx;
-	        }
-	        if (other._miny < this._miny) {
-	          this._miny = other._miny;
-	        }
-	        if (other._maxy > this._maxy) {
-	          this._maxy = other._maxy;
-	        }
-	      }
-	    }
-	  } else if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var y = arguments[1];
-	    if (this.isNull()) {
-	      this._minx = x;
-	      this._maxx = x;
-	      this._miny = y;
-	      this._maxy = y;
+
+	  function setPlaceholder(values) {
+	    if (_isMulti || _isSemi) {
+	      _staticPlaceholder = field.placeholder() || _t('inspector.add');
 	    } else {
-	      if (x < this._minx) {
-	        this._minx = x;
-	      }
-	      if (x > this._maxx) {
-	        this._maxx = x;
-	      }
-	      if (y < this._miny) {
-	        this._miny = y;
-	      }
-	      if (y > this._maxy) {
-	        this._maxy = y;
-	      }
+	      var vals = values.map(function (d) {
+	        return d.value;
+	      }).filter(function (s) {
+	        return s.length < 20;
+	      });
+	      var placeholders = vals.length > 1 ? vals : values.map(function (d) {
+	        return d.key;
+	      });
+	      _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
 	    }
-	  }
-	};
-	Envelope.prototype.minExtent = function minExtent () {
-	  if (this.isNull()) { return 0.0 }
-	  var w = this.getWidth();
-	  var h = this.getHeight();
-	  if (w < h) { return w }
-	  return h
-	};
-	Envelope.prototype.getWidth = function getWidth () {
-	  if (this.isNull()) {
-	    return 0
-	  }
-	  return this._maxx - this._minx
-	};
-	Envelope.prototype.compareTo = function compareTo (o) {
-	  var env = o;
-	  if (this.isNull()) {
-	    if (env.isNull()) { return 0 }
-	    return -1
-	  } else {
-	    if (env.isNull()) { return 1 }
-	  }
-	  if (this._minx < env._minx) { return -1 }
-	  if (this._minx > env._minx) { return 1 }
-	  if (this._miny < env._miny) { return -1 }
-	  if (this._miny > env._miny) { return 1 }
-	  if (this._maxx < env._maxx) { return -1 }
-	  if (this._maxx > env._maxx) { return 1 }
-	  if (this._maxy < env._maxy) { return -1 }
-	  if (this._maxy > env._maxy) { return 1 }
-	  return 0
-	};
-	Envelope.prototype.translate = function translate (transX, transY) {
-	  if (this.isNull()) {
-	    return null
-	  }
-	  this.init(this.getMinX() + transX, this.getMaxX() + transX, this.getMinY() + transY, this.getMaxY() + transY);
-	};
-	Envelope.prototype.toString = function toString () {
-	  return 'Env[' + this._minx + ' : ' + this._maxx + ', ' + this._miny + ' : ' + this._maxy + ']'
-	};
-	Envelope.prototype.setToNull = function setToNull () {
-	  this._minx = 0;
-	  this._maxx = -1;
-	  this._miny = 0;
-	  this._maxy = -1;
-	};
-	Envelope.prototype.getHeight = function getHeight () {
-	  if (this.isNull()) {
-	    return 0
-	  }
-	  return this._maxy - this._miny
-	};
-	Envelope.prototype.maxExtent = function maxExtent () {
-	  if (this.isNull()) { return 0.0 }
-	  var w = this.getWidth();
-	  var h = this.getHeight();
-	  if (w > h) { return w }
-	  return h
-	};
-	Envelope.prototype.expandBy = function expandBy () {
-	  if (arguments.length === 1) {
-	    var distance = arguments[0];
-	    this.expandBy(distance, distance);
-	  } else if (arguments.length === 2) {
-	    var deltaX = arguments[0];
-	    var deltaY = arguments[1];
-	    if (this.isNull()) { return null }
-	    this._minx -= deltaX;
-	    this._maxx += deltaX;
-	    this._miny -= deltaY;
-	    this._maxy += deltaY;
-	    if (this._minx > this._maxx || this._miny > this._maxy) { this.setToNull(); }
-	  }
-	};
-	Envelope.prototype.contains = function contains () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Envelope) {
-	      var other = arguments[0];
-	      return this.covers(other)
-	    } else if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      return this.covers(p)
-	    }
-	  } else if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var y = arguments[1];
-	    return this.covers(x, y)
-	  }
-	};
-	Envelope.prototype.centre = function centre () {
-	  if (this.isNull()) { return null }
-	  return new Coordinate((this.getMinX() + this.getMaxX()) / 2.0, (this.getMinY() + this.getMaxY()) / 2.0)
-	};
-	Envelope.prototype.init = function init () {
-	  if (arguments.length === 0) {
-	    this.setToNull();
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var p = arguments[0];
-	      this.init(p.x, p.x, p.y, p.y);
-	    } else if (arguments[0] instanceof Envelope) {
-	      var env = arguments[0];
-	      this._minx = env._minx;
-	      this._maxx = env._maxx;
-	      this._miny = env._miny;
-	      this._maxy = env._maxy;
-	    }
-	  } else if (arguments.length === 2) {
-	    var p1 = arguments[0];
-	    var p2 = arguments[1];
-	    this.init(p1.x, p2.x, p1.y, p2.y);
-	  } else if (arguments.length === 4) {
-	    var x1 = arguments[0];
-	    var x2 = arguments[1];
-	    var y1 = arguments[2];
-	    var y2 = arguments[3];
-	    if (x1 < x2) {
-	      this._minx = x1;
-	      this._maxx = x2;
-	    } else {
-	      this._minx = x2;
-	      this._maxx = x1;
+
+	    if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
+	      _staticPlaceholder += '…';
 	    }
-	    if (y1 < y2) {
-	      this._miny = y1;
-	      this._maxy = y2;
+
+	    var ph;
+
+	    if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
+	      ph = _t('inspector.multiple_values');
 	    } else {
-	      this._miny = y2;
-	      this._maxy = y1;
+	      ph = _staticPlaceholder;
 	    }
+
+	    _container.selectAll('input').attr('placeholder', ph);
 	  }
-	};
-	Envelope.prototype.getMaxY = function getMaxY () {
-	  return this._maxy
-	};
-	Envelope.prototype.distance = function distance (env) {
-	  if (this.intersects(env)) { return 0 }
-	  var dx = 0.0;
-	  if (this._maxx < env._minx) { dx = env._minx - this._maxx; } else if (this._minx > env._maxx) { dx = this._minx - env._maxx; }
-	  var dy = 0.0;
-	  if (this._maxy < env._miny) { dy = env._miny - this._maxy; } else if (this._miny > env._maxy) { dy = this._miny - env._maxy; }
-	  if (dx === 0.0) { return dy }
-	  if (dy === 0.0) { return dx }
-	  return Math.sqrt(dx * dx + dy * dy)
-	};
-	Envelope.prototype.hashCode = function hashCode () {
-	  var result = 17;
-	  result = 37 * result + Coordinate.hashCode(this._minx);
-	  result = 37 * result + Coordinate.hashCode(this._maxx);
-	  result = 37 * result + Coordinate.hashCode(this._miny);
-	  result = 37 * result + Coordinate.hashCode(this._maxy);
-	  return result
-	};
-	Envelope.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable, Serializable]
-	};
-	Envelope.prototype.getClass = function getClass () {
-	  return Envelope
-	};
-	Envelope.intersects = function intersects () {
-	  if (arguments.length === 3) {
-	    var p1 = arguments[0];
-	    var p2 = arguments[1];
-	    var q = arguments[2];
-	    if (q.x >= (p1.x < p2.x ? p1.x : p2.x) && q.x <= (p1.x > p2.x ? p1.x : p2.x) && (q.y >= (p1.y < p2.y ? p1.y : p2.y) && q.y <= (p1.y > p2.y ? p1.y : p2.y))) {
-	      return true
-	    }
-	    return false
-	  } else if (arguments.length === 4) {
-	    var p1$1 = arguments[0];
-	    var p2$1 = arguments[1];
-	    var q1 = arguments[2];
-	    var q2 = arguments[3];
-	    var minq = Math.min(q1.x, q2.x);
-	    var maxq = Math.max(q1.x, q2.x);
-	    var minp = Math.min(p1$1.x, p2$1.x);
-	    var maxp = Math.max(p1$1.x, p2$1.x);
-	    if (minp > maxq) { return false }
-	    if (maxp < minq) { return false }
-	    minq = Math.min(q1.y, q2.y);
-	    maxq = Math.max(q1.y, q2.y);
-	    minp = Math.min(p1$1.y, p2$1.y);
-	    maxp = Math.max(p1$1.y, p2$1.y);
-	    if (minp > maxq) { return false }
-	    if (maxp < minq) { return false }
-	    return true
-	  }
-	};
-	staticAccessors$9.serialVersionUID.get = function () { return 5873921885273102420 };
 
-	Object.defineProperties( Envelope, staticAccessors$9 );
+	  function change() {
+	    var t = {};
+	    var val;
 
-	var regExes = {
-	  'typeStr': /^\s*(\w+)\s*\(\s*(.*)\s*\)\s*$/,
-	  'emptyTypeStr': /^\s*(\w+)\s*EMPTY\s*$/,
-	  'spaces': /\s+/,
-	  'parenComma': /\)\s*,\s*\(/,
-	  'doubleParenComma': /\)\s*\)\s*,\s*\(\s*\(/, // can't use {2} here
-	  'trimParens': /^\s*\(?(.*?)\)?\s*$/
-	};
+	    if (_isMulti || _isSemi) {
+	      val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';
 
-	/**
-	 * Class for reading and writing Well-Known Text.
-	 *
-	 * NOTE: Adapted from OpenLayers 2.11 implementation.
-	 */
+	      _container.classed('active', false);
 
-	/** Create a new parser for WKT
-	 *
-	 * @param {GeometryFactory} geometryFactory
-	 * @return An instance of WKTParser.
-	 * @constructor
-	 * @private
-	 */
-	var WKTParser = function WKTParser (geometryFactory) {
-	  this.geometryFactory = geometryFactory || new GeometryFactory();
-	};
-	/**
-	 * Deserialize a WKT string and return a geometry. Supports WKT for POINT,
-	 * MULTIPOINT, LINESTRING, LINEARRING, MULTILINESTRING, POLYGON, MULTIPOLYGON,
-	 * and GEOMETRYCOLLECTION.
-	 *
-	 * @param {String} wkt A WKT string.
-	 * @return {Geometry} A geometry instance.
-	 * @private
-	 */
-	WKTParser.prototype.read = function read (wkt) {
-	  var geometry, type, str;
-	  wkt = wkt.replace(/[\n\r]/g, ' ');
-	  var matches = regExes.typeStr.exec(wkt);
-	  if (wkt.search('EMPTY') !== -1) {
-	    matches = regExes.emptyTypeStr.exec(wkt);
-	    matches[2] = undefined;
-	  }
-	  if (matches) {
-	    type = matches[1].toLowerCase();
-	    str = matches[2];
-	    if (parse$1[type]) {
-	      geometry = parse$1[type].apply(this, [str]);
+	      utilGetSetValue(_input, '');
+	      var vals = val.split(';').filter(Boolean);
+	      if (!vals.length) return;
+
+	      if (_isMulti) {
+	        utilArrayUniq(vals).forEach(function (v) {
+	          var key = (field.key || '') + v;
+
+	          if (_tags) {
+	            // don't set a multicombo value to 'yes' if it already has a non-'no' value
+	            // e.g. `language:de=main`
+	            var old = _tags[key];
+	            if (typeof old === 'string' && old.toLowerCase() !== 'no') return;
+	          }
+
+	          key = context.cleanTagKey(key);
+	          field.keys.push(key);
+	          t[key] = 'yes';
+	        });
+	      } else if (_isSemi) {
+	        var arr = _multiData.map(function (d) {
+	          return d.key;
+	        });
+
+	        arr = arr.concat(vals);
+	        t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
+	      }
+
+	      window.setTimeout(function () {
+	        _input.node().focus();
+	      }, 10);
+	    } else {
+	      var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string
+
+	      if (!rawValue && Array.isArray(_tags[field.key])) return;
+	      val = context.cleanTagValue(tagValue(rawValue));
+	      t[field.key] = val || undefined;
 	    }
+
+	    dispatch$1.call('change', this, t);
 	  }
 
-	  if (geometry === undefined) { throw new Error('Could not parse WKT ' + wkt) }
+	  function removeMultikey(d3_event, d) {
+	    d3_event.preventDefault();
+	    d3_event.stopPropagation();
+	    var t = {};
 
-	  return geometry
-	};
+	    if (_isMulti) {
+	      t[d.key] = undefined;
+	    } else if (_isSemi) {
+	      var arr = _multiData.map(function (md) {
+	        return md.key === d.key ? null : md.key;
+	      }).filter(Boolean);
 
-	/**
-	 * Serialize a geometry into a WKT string.
-	 *
-	 * @param {Geometry} geometry A feature or array of features.
-	 * @return {String} The WKT string representation of the input geometries.
-	 * @private
-	 */
-	WKTParser.prototype.write = function write (geometry) {
-	  return this.extractGeometry(geometry)
-	};
+	      arr = utilArrayUniq(arr);
+	      t[field.key] = arr.length ? arr.join(';') : undefined;
+	    }
 
-	/**
-	 * Entry point to construct the WKT for a single Geometry object.
-	 *
-	 * @param {Geometry} geometry
-	 * @return {String} A WKT string of representing the geometry.
-	 * @private
-	 */
-	WKTParser.prototype.extractGeometry = function extractGeometry (geometry) {
-	  var type = geometry.getGeometryType().toLowerCase();
-	  if (!extract$1[type]) {
-	    return null
-	  }
-	  var wktType = type.toUpperCase();
-	  var data;
-	  if (geometry.isEmpty()) {
-	    data = wktType + ' EMPTY';
-	  } else {
-	    data = wktType + '(' + extract$1[type].apply(this, [geometry]) + ')';
+	    dispatch$1.call('change', this, t);
 	  }
-	  return data
-	};
 
-	/**
-	 * Object with properties corresponding to the geometry types. Property values
-	 * are functions that do the actual data extraction.
-	 * @private
-	 */
-	var extract$1 = {
-	  coordinate: function coordinate (coordinate$1) {
-	    return coordinate$1.x + ' ' + coordinate$1.y
-	  },
+	  function combo(selection) {
+	    _container = selection.selectAll('.form-field-input-wrap').data([0]);
+	    var type = _isMulti || _isSemi ? 'multicombo' : 'combo';
+	    _container = _container.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + type).merge(_container);
 
-	  /**
-	   * Return a space delimited string of point coordinates.
-	   *
-	   * @param {Point}
-	   *          point
-	   * @return {String} A string of coordinates representing the point.
-	   */
-	  point: function point (point$1) {
-	    return extract$1.coordinate.call(this, point$1._coordinates._coordinates[0])
-	  },
+	    if (_isMulti || _isSemi) {
+	      _container = _container.selectAll('.chiplist').data([0]);
+	      var listClass = 'chiplist'; // Use a separate line for each value in the Destinations field
+	      // to mimic highway exit signs
 
-	  /**
-	   * Return a comma delimited string of point coordinates from a multipoint.
-	   *
-	   * @param {MultiPoint}
-	   *          multipoint
-	   * @return {String} A string of point coordinate strings representing the
-	   *         multipoint.
-	   */
-	  multipoint: function multipoint (multipoint$1) {
-	    var this$1 = this;
+	      if (field.key === 'destination') {
+	        listClass += ' full-line-chips';
+	      }
 
-	    var array = [];
-	    for (var i = 0, len = multipoint$1._geometries.length; i < len; ++i) {
-	      array.push('(' + extract$1.point.apply(this$1, [multipoint$1._geometries[i]]) + ')');
+	      _container = _container.enter().append('ul').attr('class', listClass).on('click', function () {
+	        window.setTimeout(function () {
+	          _input.node().focus();
+	        }, 10);
+	      }).merge(_container);
+	      _inputWrap = _container.selectAll('.input-wrap').data([0]);
+	      _inputWrap = _inputWrap.enter().append('li').attr('class', 'input-wrap').merge(_inputWrap);
+	      _input = _inputWrap.selectAll('input').data([0]);
+	    } else {
+	      _input = _container.selectAll('input').data([0]);
 	    }
-	    return array.join(',')
-	  },
 
-	  /**
-	   * Return a comma delimited string of point coordinates from a line.
-	   *
-	   * @param {LineString} linestring
-	   * @return {String} A string of point coordinate strings representing the linestring.
-	   */
-	  linestring: function linestring (linestring$1) {
-	    var this$1 = this;
+	    _input = _input.enter().append('input').attr('type', 'text').attr('id', field.domId).call(utilNoAuto).call(initCombo, selection).merge(_input);
 
-	    var array = [];
-	    for (var i = 0, len = linestring$1._points._coordinates.length; i < len; ++i) {
-	      array.push(extract$1.coordinate.apply(this$1, [linestring$1._points._coordinates[i]]));
+	    if (_isNetwork) {
+	      var extent = combinedEntityExtent();
+	      var countryCode = extent && iso1A2Code(extent.center());
+	      _countryCode = countryCode && countryCode.toLowerCase();
 	    }
-	    return array.join(',')
-	  },
 
-	  linearring: function linearring (linearring$1) {
-	    var this$1 = this;
+	    _input.on('change', change).on('blur', change);
 
-	    var array = [];
-	    for (var i = 0, len = linearring$1._points._coordinates.length; i < len; ++i) {
-	      array.push(extract$1.coordinate.apply(this$1, [linearring$1._points._coordinates[i]]));
-	    }
-	    return array.join(',')
-	  },
+	    _input.on('keydown.field', function (d3_event) {
+	      switch (d3_event.keyCode) {
+	        case 13:
+	          // ↩ Return
+	          _input.node().blur(); // blurring also enters the value
 
-	  /**
-	   * Return a comma delimited string of linestring strings from a
-	   * multilinestring.
-	   *
-	   * @param {MultiLineString} multilinestring
-	   * @return {String} A string of of linestring strings representing the multilinestring.
-	   */
-	  multilinestring: function multilinestring (multilinestring$1) {
-	    var this$1 = this;
 
-	    var array = [];
-	    for (var i = 0, len = multilinestring$1._geometries.length; i < len; ++i) {
-	      array.push('(' +
-	        extract$1.linestring.apply(this$1, [multilinestring$1._geometries[i]]) +
-	        ')');
-	    }
-	    return array.join(',')
-	  },
+	          d3_event.stopPropagation();
+	          break;
+	      }
+	    });
 
-	  /**
-	   * Return a comma delimited string of linear ring arrays from a polygon.
-	   *
-	   * @param {Polygon} polygon
-	   * @return {String} An array of linear ring arrays representing the polygon.
-	   */
-	  polygon: function polygon (polygon$1) {
-	    var this$1 = this;
+	    if (_isMulti || _isSemi) {
+	      _combobox.on('accept', function () {
+	        _input.node().blur();
 
-	    var array = [];
-	    array.push('(' + extract$1.linestring.apply(this, [polygon$1._shell]) + ')');
-	    for (var i = 0, len = polygon$1._holes.length; i < len; ++i) {
-	      array.push('(' + extract$1.linestring.apply(this$1, [polygon$1._holes[i]]) + ')');
+	        _input.node().focus();
+	      });
+
+	      _input.on('focus', function () {
+	        _container.classed('active', true);
+	      });
 	    }
-	    return array.join(',')
-	  },
+	  }
 
-	  /**
-	   * Return an array of polygon arrays from a multipolygon.
-	   *
-	   * @param {MultiPolygon} multipolygon
-	   * @return {String} An array of polygon arrays representing the multipolygon.
-	   */
-	  multipolygon: function multipolygon (multipolygon$1) {
-	    var this$1 = this;
+	  combo.tags = function (tags) {
+	    _tags = tags;
 
-	    var array = [];
-	    for (var i = 0, len = multipolygon$1._geometries.length; i < len; ++i) {
-	      array.push('(' + extract$1.polygon.apply(this$1, [multipolygon$1._geometries[i]]) + ')');
-	    }
-	    return array.join(',')
-	  },
+	    if (_isMulti || _isSemi) {
+	      _multiData = [];
+	      var maxLength;
 
-	  /**
-	   * Return the WKT portion between 'GEOMETRYCOLLECTION(' and ')' for an
-	   * geometrycollection.
-	   *
-	   * @param {GeometryCollection} collection
-	   * @return {String} internal WKT representation of the collection.
-	   */
-	  geometrycollection: function geometrycollection (collection) {
-	    var this$1 = this;
+	      if (_isMulti) {
+	        // Build _multiData array containing keys already set..
+	        for (var k in tags) {
+	          if (field.key && k.indexOf(field.key) !== 0 || field.keys.indexOf(k) === -1) continue;
+	          var v = tags[k];
+	          if (!v || typeof v === 'string' && v.toLowerCase() === 'no') continue;
+	          var suffix = field.key ? k.substring(field.key.length) : k;
+
+	          _multiData.push({
+	            key: k,
+	            value: displayValue(suffix),
+	            isMixed: Array.isArray(v)
+	          });
+	        }
 
-	    var array = [];
-	    for (var i = 0, len = collection._geometries.length; i < len; ++i) {
-	      array.push(this$1.extractGeometry(collection._geometries[i]));
-	    }
-	    return array.join(',')
-	  }
-	};
+	        if (field.key) {
+	          // Set keys for form-field modified (needed for undo and reset buttons)..
+	          field.keys = _multiData.map(function (d) {
+	            return d.key;
+	          }); // limit the input length so it fits after prepending the key prefix
 
-	/**
-	 * Object with properties corresponding to the geometry types. Property values
-	 * are functions that do the actual parsing.
-	 * @private
-	 */
-	var parse$1 = {
-	  /**
-	   * Return point geometry given a point WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the point.
-	   * @return {Point} A point geometry.
-	   * @private
-	   */
-	  point: function point (str) {
-	    if (str === undefined) {
-	      return this.geometryFactory.createPoint()
-	    }
+	          maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+	        } else {
+	          maxLength = context.maxCharsForTagKey();
+	        }
+	      } else if (_isSemi) {
+	        var allValues = [];
+	        var commonValues;
 
-	    var coords = str.trim().split(regExes.spaces);
-	    return this.geometryFactory.createPoint(new Coordinate(Number.parseFloat(coords[0]),
-	      Number.parseFloat(coords[1])))
-	  },
+	        if (Array.isArray(tags[field.key])) {
+	          tags[field.key].forEach(function (tagVal) {
+	            var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
+	            allValues = allValues.concat(thisVals);
 
-	  /**
-	   * Return a multipoint geometry given a multipoint WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the multipoint.
-	   * @return {Point} A multipoint feature.
-	   * @private
-	   */
-	  multipoint: function multipoint (str) {
-	    var this$1 = this;
+	            if (!commonValues) {
+	              commonValues = thisVals;
+	            } else {
+	              commonValues = commonValues.filter(function (value) {
+	                return thisVals.includes(value);
+	              });
+	            }
+	          });
+	          allValues = utilArrayUniq(allValues).filter(Boolean);
+	        } else {
+	          allValues = utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
+	          commonValues = allValues;
+	        }
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createMultiPoint()
-	    }
+	        _multiData = allValues.map(function (v) {
+	          return {
+	            key: v,
+	            value: displayValue(v),
+	            isMixed: !commonValues.includes(v)
+	          };
+	        });
+	        var currLength = utilUnicodeCharsCount(commonValues.join(';')); // limit the input length to the remaining available characters
 
-	    var point;
-	    var points = str.trim().split(',');
-	    var components = [];
-	    for (var i = 0, len = points.length; i < len; ++i) {
-	      point = points[i].replace(regExes.trimParens, '$1');
-	      components.push(parse$1.point.apply(this$1, [point]));
-	    }
-	    return this.geometryFactory.createMultiPoint(components)
-	  },
+	        maxLength = context.maxCharsForTagValue() - currLength;
 
-	  /**
-	   * Return a linestring geometry given a linestring WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the linestring.
-	   * @return {LineString} A linestring geometry.
-	   * @private
-	   */
-	  linestring: function linestring (str) {
-	    if (str === undefined) {
-	      return this.geometryFactory.createLineString()
-	    }
+	        if (currLength > 0) {
+	          // account for the separator if a new value will be appended to existing
+	          maxLength -= 1;
+	        }
+	      } // a negative maxlength doesn't make sense
 
-	    var points = str.trim().split(',');
-	    var components = [];
-	    var coords;
-	    for (var i = 0, len = points.length; i < len; ++i) {
-	      coords = points[i].trim().split(regExes.spaces);
-	      components.push(new Coordinate(Number.parseFloat(coords[0]), Number.parseFloat(coords[1])));
-	    }
-	    return this.geometryFactory.createLineString(components)
-	  },
 
-	  /**
-	   * Return a linearring geometry given a linearring WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the linearring.
-	   * @return {LinearRing} A linearring geometry.
-	   * @private
-	   */
-	  linearring: function linearring (str) {
-	    if (str === undefined) {
-	      return this.geometryFactory.createLinearRing()
-	    }
+	      maxLength = Math.max(0, maxLength);
+	      var allowDragAndDrop = _isSemi // only semiCombo values are ordered
+	      && !Array.isArray(tags[field.key]); // Exclude existing multikeys from combo options..
 
-	    var points = str.trim().split(',');
-	    var components = [];
-	    var coords;
-	    for (var i = 0, len = points.length; i < len; ++i) {
-	      coords = points[i].trim().split(regExes.spaces);
-	      components.push(new Coordinate(Number.parseFloat(coords[0]), Number.parseFloat(coords[1])));
-	    }
-	    return this.geometryFactory.createLinearRing(components)
-	  },
+	      var available = objectDifference(_comboData, _multiData);
 
-	  /**
-	   * Return a multilinestring geometry given a multilinestring WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the multilinestring.
-	   * @return {MultiLineString} A multilinestring geometry.
-	   * @private
-	   */
-	  multilinestring: function multilinestring (str) {
-	    var this$1 = this;
+	      _combobox.data(available); // Hide 'Add' button if this field uses fixed set of
+	      // translateable _optstrings and they're all currently used,
+	      // or if the field is already at its character limit
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createMultiLineString()
-	    }
 
-	    var line;
-	    var lines = str.trim().split(regExes.parenComma);
-	    var components = [];
-	    for (var i = 0, len = lines.length; i < len; ++i) {
-	      line = lines[i].replace(regExes.trimParens, '$1');
-	      components.push(parse$1.linestring.apply(this$1, [line]));
-	    }
-	    return this.geometryFactory.createMultiLineString(components)
-	  },
+	      var hideAdd = _optstrings && !available.length || maxLength <= 0;
 
-	  /**
-	   * Return a polygon geometry given a polygon WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the polygon.
-	   * @return {Polygon} A polygon geometry.
-	   * @private
-	   */
-	  polygon: function polygon (str) {
-	    var this$1 = this;
+	      _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createPolygon()
-	    }
 
-	    var ring, linestring, linearring;
-	    var rings = str.trim().split(regExes.parenComma);
-	    var shell;
-	    var holes = [];
-	    for (var i = 0, len = rings.length; i < len; ++i) {
-	      ring = rings[i].replace(regExes.trimParens, '$1');
-	      linestring = parse$1.linestring.apply(this$1, [ring]);
-	      linearring = this$1.geometryFactory.createLinearRing(linestring._points);
-	      if (i === 0) {
-	        shell = linearring;
-	      } else {
-	        holes.push(linearring);
+	      var chips = _container.selectAll('.chip').data(_multiData);
+
+	      chips.exit().remove();
+	      var enter = chips.enter().insert('li', '.input-wrap').attr('class', 'chip');
+	      enter.append('span');
+	      enter.append('a');
+	      chips = chips.merge(enter).order().classed('draggable', allowDragAndDrop).classed('mixed', function (d) {
+	        return d.isMixed;
+	      }).attr('title', function (d) {
+	        return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
+	      });
+
+	      if (allowDragAndDrop) {
+	        registerDragAndDrop(chips);
 	      }
+
+	      chips.select('span').html(function (d) {
+	        return d.value;
+	      });
+	      chips.select('a').attr('href', '#').on('click', removeMultikey).attr('class', 'remove').html('×');
+	    } else {
+	      var isMixed = Array.isArray(tags[field.key]);
+	      var mixedValues = isMixed && tags[field.key].map(function (val) {
+	        return displayValue(val);
+	      }).filter(Boolean);
+	      utilGetSetValue(_input, !isMixed ? displayValue(tags[field.key]) : '').attr('title', isMixed ? mixedValues.join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : _staticPlaceholder || '').classed('mixed', isMixed);
 	    }
-	    return this.geometryFactory.createPolygon(shell, holes)
-	  },
+	  };
 
-	  /**
-	   * Return a multipolygon geometry given a multipolygon WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the multipolygon.
-	   * @return {MultiPolygon} A multipolygon geometry.
-	   * @private
-	   */
-	  multipolygon: function multipolygon (str) {
-	    var this$1 = this;
+	  function registerDragAndDrop(selection) {
+	    // allow drag and drop re-ordering of chips
+	    var dragOrigin, targetIndex;
+	    selection.call(d3_drag().on('start', function (d3_event) {
+	      dragOrigin = {
+	        x: d3_event.x,
+	        y: d3_event.y
+	      };
+	      targetIndex = null;
+	    }).on('drag', function (d3_event) {
+	      var x = d3_event.x - dragOrigin.x,
+	          y = d3_event.y - dragOrigin.y;
+	      if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
+	      Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
+	      var index = selection.nodes().indexOf(this);
+	      select(this).classed('dragging', true);
+	      targetIndex = null;
+	      var targetIndexOffsetTop = null;
+	      var draggedTagWidth = select(this).node().offsetWidth;
+
+	      if (field.key === 'destination') {
+	        // meaning tags are full width
+	        _container.selectAll('.chip').style('transform', function (d2, index2) {
+	          var node = select(this).node();
+
+	          if (index === index2) {
+	            return 'translate(' + x + 'px, ' + y + 'px)'; // move the dragged tag up the order
+	          } else if (index2 > index && d3_event.y > node.offsetTop) {
+	            if (targetIndex === null || index2 > targetIndex) {
+	              targetIndex = index2;
+	            }
+
+	            return 'translateY(-100%)'; // move the dragged tag down the order
+	          } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+	            if (targetIndex === null || index2 < targetIndex) {
+	              targetIndex = index2;
+	            }
+
+	            return 'translateY(100%)';
+	          }
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createMultiPolygon()
-	    }
+	          return null;
+	        });
+	      } else {
+	        _container.selectAll('.chip').each(function (d2, index2) {
+	          var node = select(this).node(); // check the cursor is in the bounding box
 
-	    var polygon;
-	    var polygons = str.trim().split(regExes.doubleParenComma);
-	    var components = [];
-	    for (var i = 0, len = polygons.length; i < len; ++i) {
-	      polygon = polygons[i].replace(regExes.trimParens, '$1');
-	      components.push(parse$1.polygon.apply(this$1, [polygon]));
-	    }
-	    return this.geometryFactory.createMultiPolygon(components)
-	  },
+	          if (index !== index2 && d3_event.x < node.offsetLeft + node.offsetWidth + 5 && d3_event.x > node.offsetLeft && d3_event.y < node.offsetTop + node.offsetHeight && d3_event.y > node.offsetTop) {
+	            targetIndex = index2;
+	            targetIndexOffsetTop = node.offsetTop;
+	          }
+	        }).style('transform', function (d2, index2) {
+	          var node = select(this).node();
 
-	  /**
-	   * Return a geometrycollection given a geometrycollection WKT fragment.
-	   *
-	   * @param {String} str A WKT fragment representing the geometrycollection.
-	   * @return {GeometryCollection}
-	   * @private
-	   */
-	  geometrycollection: function geometrycollection (str) {
-	    var this$1 = this;
+	          if (index === index2) {
+	            return 'translate(' + x + 'px, ' + y + 'px)';
+	          } // only translate tags in the same row
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createGeometryCollection()
-	    }
 
-	    // separate components of the collection with |
-	    str = str.replace(/,\s*([A-Za-z])/g, '|$1');
-	    var wktArray = str.trim().split('|');
-	    var components = [];
-	    for (var i = 0, len = wktArray.length; i < len; ++i) {
-	      components.push(this$1.read(wktArray[i]));
-	    }
-	    return this.geometryFactory.createGeometryCollection(components)
-	  }
-	};
+	          if (node.offsetTop === targetIndexOffsetTop) {
+	            if (index2 < index && index2 >= targetIndex) {
+	              return 'translateX(' + draggedTagWidth + 'px)';
+	            } else if (index2 > index && index2 <= targetIndex) {
+	              return 'translateX(-' + draggedTagWidth + 'px)';
+	            }
+	          }
 
-	/**
-	 * Writes the Well-Known Text representation of a {@link Geometry}. The
-	 * Well-Known Text format is defined in the <A
-	 * HREF="http://www.opengis.org/techno/specs.htm"> OGC Simple Features
-	 * Specification for SQL</A>.
-	 * <p>
-	 * The <code>WKTWriter</code> outputs coordinates rounded to the precision
-	 * model. Only the maximum number of decimal places necessary to represent the
-	 * ordinates to the required precision will be output.
-	 * <p>
-	 * The SFS WKT spec does not define a special tag for {@link LinearRing}s.
-	 * Under the spec, rings are output as <code>LINESTRING</code>s.
-	 */
+	          return null;
+	        });
+	      }
+	    }).on('end', function () {
+	      if (!select(this).classed('dragging')) {
+	        return;
+	      }
 
-	/**
-	 * @param {GeometryFactory} geometryFactory
-	 * @constructor
-	 */
-	var WKTWriter = function WKTWriter (geometryFactory) {
-	  this.parser = new WKTParser(geometryFactory);
-	};
+	      var index = selection.nodes().indexOf(this);
+	      select(this).classed('dragging', false);
 
-	/**
-	 * Converts a <code>Geometry</code> to its Well-known Text representation.
-	 *
-	 * @param {Geometry} geometry a <code>Geometry</code> to process.
-	 * @return {string} a <Geometry Tagged Text> string (see the OpenGIS Simple
-	 *       Features Specification).
-	 * @memberof WKTWriter
-	 */
-	WKTWriter.prototype.write = function write (geometry) {
-	  return this.parser.write(geometry)
-	};
-	/**
-	 * Generates the WKT for a <tt>LINESTRING</tt> specified by two
-	 * {@link Coordinate}s.
-	 *
-	 * @param p0 the first coordinate.
-	 * @param p1 the second coordinate.
-	 *
-	 * @return the WKT.
-	 * @private
-	 */
-	WKTWriter.toLineString = function toLineString (p0, p1) {
-	  if (arguments.length !== 2) {
-	    throw new Error('Not implemented')
-	  }
-	  return 'LINESTRING ( ' + p0.x + ' ' + p0.y + ', ' + p1.x + ' ' + p1.y + ' )'
-	};
+	      _container.selectAll('.chip').style('transform', null);
 
-	var RuntimeException = (function (Error) {
-	  function RuntimeException (message) {
-	    Error.call(this, message);
-	    this.name = 'RuntimeException';
-	    this.message = message;
-	    this.stack = (new Error()).stack;
-	  }
+	      if (typeof targetIndex === 'number') {
+	        var element = _multiData[index];
 
-	  if ( Error ) { RuntimeException.__proto__ = Error; }
-	  RuntimeException.prototype = Object.create( Error && Error.prototype );
-	  RuntimeException.prototype.constructor = RuntimeException;
+	        _multiData.splice(index, 1);
 
-	  return RuntimeException;
-	}(Error));
+	        _multiData.splice(targetIndex, 0, element);
 
-	var AssertionFailedException = (function (RuntimeException$$1) {
-	  function AssertionFailedException () {
-	    RuntimeException$$1.call(this);
-	    if (arguments.length === 0) {
-	      RuntimeException$$1.call(this);
-	    } else if (arguments.length === 1) {
-	      var message = arguments[0];
-	      RuntimeException$$1.call(this, message);
-	    }
+	        var t = {};
+
+	        if (_multiData.length) {
+	          t[field.key] = _multiData.map(function (element) {
+	            return element.key;
+	          }).join(';');
+	        } else {
+	          t[field.key] = undefined;
+	        }
+
+	        dispatch$1.call('change', this, t);
+	      }
+
+	      dragOrigin = undefined;
+	      targetIndex = undefined;
+	    }));
 	  }
 
-	  if ( RuntimeException$$1 ) { AssertionFailedException.__proto__ = RuntimeException$$1; }
-	  AssertionFailedException.prototype = Object.create( RuntimeException$$1 && RuntimeException$$1.prototype );
-	  AssertionFailedException.prototype.constructor = AssertionFailedException;
-	  AssertionFailedException.prototype.interfaces_ = function interfaces_ () {
-	    return []
+	  combo.focus = function () {
+	    _input.node().focus();
 	  };
-	  AssertionFailedException.prototype.getClass = function getClass () {
-	    return AssertionFailedException
+
+	  combo.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return combo;
 	  };
 
-	  return AssertionFailedException;
-	}(RuntimeException));
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	var Assert = function Assert () {};
+	  return utilRebind(combo, dispatch$1, 'on');
+	}
 
-	Assert.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Assert.prototype.getClass = function getClass () {
-	  return Assert
-	};
-	Assert.shouldNeverReachHere = function shouldNeverReachHere () {
-	  if (arguments.length === 0) {
-	    Assert.shouldNeverReachHere(null);
-	  } else if (arguments.length === 1) {
-	    var message = arguments[0];
-	    throw new AssertionFailedException('Should never reach here' + (message !== null ? ': ' + message : ''))
-	  }
-	};
-	Assert.isTrue = function isTrue () {
-	  var assertion;
-	  var message;
-	  if (arguments.length === 1) {
-	    assertion = arguments[0];
-	    Assert.isTrue(assertion, null);
-	  } else if (arguments.length === 2) {
-	    assertion = arguments[0];
-	    message = arguments[1];
-	    if (!assertion) {
-	      if (message === null) {
-	        throw new AssertionFailedException()
-	      } else {
-	        throw new AssertionFailedException(message)
-	      }
-	    }
+	function uiFieldText(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var input = select(null);
+	  var outlinkButton = select(null);
+	  var _entityIDs = [];
+
+	  var _tags;
+
+	  var _phoneFormats = {};
+
+	  if (field.type === 'tel') {
+	    _mainFileFetcher.get('phone_formats').then(function (d) {
+	      _phoneFormats = d;
+	      updatePhonePlaceholder();
+	    })["catch"](function () {
+	      /* ignore */
+	    });
 	  }
-	};
-	Assert.equals = function equals () {
-	  var expectedValue;
-	  var actualValue;
-	  var message;
-	  if (arguments.length === 2) {
-	    expectedValue = arguments[0];
-	    actualValue = arguments[1];
-	    Assert.equals(expectedValue, actualValue, null);
-	  } else if (arguments.length === 3) {
-	    expectedValue = arguments[0];
-	    actualValue = arguments[1];
-	    message = arguments[2];
-	    if (!actualValue.equals(expectedValue)) {
-	      throw new AssertionFailedException('Expected ' + expectedValue + ' but encountered ' + actualValue + (message !== null ? ': ' + message : ''))
+
+	  function i(selection) {
+	    var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
+	    var preset = entity && _mainPresetIndex.match(entity, context.graph());
+	    var isLocked = preset && preset.suggestion && field.id === 'brand';
+	    field.locked(isLocked);
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    input = wrap.selectAll('input').data([0]);
+	    input = input.enter().append('input').attr('type', field.type === 'identifier' ? 'text' : field.type).attr('id', field.domId).classed(field.type, true).call(utilNoAuto).merge(input);
+	    input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
+
+	    if (field.type === 'tel') {
+	      updatePhonePlaceholder();
+	    } else if (field.type === 'number') {
+	      var rtl = _mainLocalizer.textDirection() === 'rtl';
+	      input.attr('type', 'text');
+	      var inc = field.increment;
+	      var buttons = wrap.selectAll('.increment, .decrement').data(rtl ? [inc, -inc] : [-inc, inc]);
+	      buttons.enter().append('button').attr('class', function (d) {
+	        var which = d > 0 ? 'increment' : 'decrement';
+	        return 'form-field-button ' + which;
+	      }).merge(buttons).on('click', function (d3_event, d) {
+	        d3_event.preventDefault();
+	        var raw_vals = input.node().value || '0';
+	        var vals = raw_vals.split(';');
+	        vals = vals.map(function (v) {
+	          var num = parseFloat(v.trim(), 10);
+	          return isFinite(num) ? clamped(num + d) : v.trim();
+	        });
+	        input.node().value = vals.join(';');
+	        change()();
+	      });
+	    } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
+	      input.attr('type', 'text');
+	      outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
+	      outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
+	        var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);
+
+	        if (domainResults.length >= 2 && domainResults[1]) {
+	          var domain = domainResults[1];
+	          return _t('icons.view_on', {
+	            domain: domain
+	          });
+	        }
+
+	        return '';
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        var value = validIdentifierValueForLink();
+
+	        if (value) {
+	          var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
+	          window.open(url, '_blank');
+	        }
+	      }).merge(outlinkButton);
 	    }
 	  }
-	};
 
-	var LineIntersector = function LineIntersector () {
-	  this._result = null;
-	  this._inputLines = Array(2).fill().map(function () { return Array(2); });
-	  this._intPt = new Array(2).fill(null);
-	  this._intLineIndex = null;
-	  this._isProper = null;
-	  this._pa = null;
-	  this._pb = null;
-	  this._precisionModel = null;
-	  this._intPt[0] = new Coordinate();
-	  this._intPt[1] = new Coordinate();
-	  this._pa = this._intPt[0];
-	  this._pb = this._intPt[1];
-	  this._result = 0;
-	};
+	  function updatePhonePlaceholder() {
+	    if (input.empty() || !Object.keys(_phoneFormats).length) return;
+	    var extent = combinedEntityExtent();
+	    var countryCode = extent && iso1A2Code(extent.center());
 
-	var staticAccessors$10 = { DONT_INTERSECT: { configurable: true },DO_INTERSECT: { configurable: true },COLLINEAR: { configurable: true },NO_INTERSECTION: { configurable: true },POINT_INTERSECTION: { configurable: true },COLLINEAR_INTERSECTION: { configurable: true } };
-	LineIntersector.prototype.getIndexAlongSegment = function getIndexAlongSegment (segmentIndex, intIndex) {
-	  this.computeIntLineIndex();
-	  return this._intLineIndex[segmentIndex][intIndex]
-	};
-	LineIntersector.prototype.getTopologySummary = function getTopologySummary () {
-	  var catBuf = new StringBuffer();
-	  if (this.isEndPoint()) { catBuf.append(' endpoint'); }
-	  if (this._isProper) { catBuf.append(' proper'); }
-	  if (this.isCollinear()) { catBuf.append(' collinear'); }
-	  return catBuf.toString()
-	};
-	LineIntersector.prototype.computeIntersection = function computeIntersection (p1, p2, p3, p4) {
-	  this._inputLines[0][0] = p1;
-	  this._inputLines[0][1] = p2;
-	  this._inputLines[1][0] = p3;
-	  this._inputLines[1][1] = p4;
-	  this._result = this.computeIntersect(p1, p2, p3, p4);
-	};
-	LineIntersector.prototype.getIntersectionNum = function getIntersectionNum () {
-	  return this._result
-	};
-	LineIntersector.prototype.computeIntLineIndex = function computeIntLineIndex () {
-	  if (arguments.length === 0) {
-	    if (this._intLineIndex === null) {
-	      this._intLineIndex = Array(2).fill().map(function () { return Array(2); });
-	      this.computeIntLineIndex(0);
-	      this.computeIntLineIndex(1);
-	    }
-	  } else if (arguments.length === 1) {
-	    var segmentIndex = arguments[0];
-	    var dist0 = this.getEdgeDistance(segmentIndex, 0);
-	    var dist1 = this.getEdgeDistance(segmentIndex, 1);
-	    if (dist0 > dist1) {
-	      this._intLineIndex[segmentIndex][0] = 0;
-	      this._intLineIndex[segmentIndex][1] = 1;
-	    } else {
-	      this._intLineIndex[segmentIndex][0] = 1;
-	      this._intLineIndex[segmentIndex][1] = 0;
-	    }
+	    var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
+
+	    if (format) input.attr('placeholder', format);
 	  }
-	};
-	LineIntersector.prototype.isProper = function isProper () {
-	  return this.hasIntersection() && this._isProper
-	};
-	LineIntersector.prototype.setPrecisionModel = function setPrecisionModel (precisionModel) {
-	  this._precisionModel = precisionModel;
-	};
-	LineIntersector.prototype.isInteriorIntersection = function isInteriorIntersection () {
-	    var this$1 = this;
 
-	  if (arguments.length === 0) {
-	    if (this.isInteriorIntersection(0)) { return true }
-	    if (this.isInteriorIntersection(1)) { return true }
-	    return false
-	  } else if (arguments.length === 1) {
-	    var inputLineIndex = arguments[0];
-	    for (var i = 0; i < this._result; i++) {
-	      if (!(this$1._intPt[i].equals2D(this$1._inputLines[inputLineIndex][0]) || this$1._intPt[i].equals2D(this$1._inputLines[inputLineIndex][1]))) {
-	        return true
-	      }
+	  function validIdentifierValueForLink() {
+	    if (field.type === 'identifier' && field.pattern) {
+	      var value = utilGetSetValue(input).trim().split(';')[0];
+	      return value && value.match(new RegExp(field.pattern));
 	    }
-	    return false
-	  }
-	};
-	LineIntersector.prototype.getIntersection = function getIntersection (intIndex) {
-	  return this._intPt[intIndex]
-	};
-	LineIntersector.prototype.isEndPoint = function isEndPoint () {
-	  return this.hasIntersection() && !this._isProper
-	};
-	LineIntersector.prototype.hasIntersection = function hasIntersection () {
-	  return this._result !== LineIntersector.NO_INTERSECTION
-	};
-	LineIntersector.prototype.getEdgeDistance = function getEdgeDistance (segmentIndex, intIndex) {
-	  var dist = LineIntersector.computeEdgeDistance(this._intPt[intIndex], this._inputLines[segmentIndex][0], this._inputLines[segmentIndex][1]);
-	  return dist
-	};
-	LineIntersector.prototype.isCollinear = function isCollinear () {
-	  return this._result === LineIntersector.COLLINEAR_INTERSECTION
-	};
-	LineIntersector.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(this._inputLines[0][0], this._inputLines[0][1]) + ' - ' + WKTWriter.toLineString(this._inputLines[1][0], this._inputLines[1][1]) + this.getTopologySummary()
-	};
-	LineIntersector.prototype.getEndpoint = function getEndpoint (segmentIndex, ptIndex) {
-	  return this._inputLines[segmentIndex][ptIndex]
-	};
-	LineIntersector.prototype.isIntersection = function isIntersection (pt) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < this._result; i++) {
-	    if (this$1._intPt[i].equals2D(pt)) {
-	      return true
+	    return null;
+	  } // clamp number to min/max
+
+
+	  function clamped(num) {
+	    if (field.minValue !== undefined) {
+	      num = Math.max(num, field.minValue);
 	    }
-	  }
-	  return false
-	};
-	LineIntersector.prototype.getIntersectionAlongSegment = function getIntersectionAlongSegment (segmentIndex, intIndex) {
-	  this.computeIntLineIndex();
-	  return this._intPt[this._intLineIndex[segmentIndex][intIndex]]
-	};
-	LineIntersector.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	LineIntersector.prototype.getClass = function getClass () {
-	  return LineIntersector
-	};
-	LineIntersector.computeEdgeDistance = function computeEdgeDistance (p, p0, p1) {
-	  var dx = Math.abs(p1.x - p0.x);
-	  var dy = Math.abs(p1.y - p0.y);
-	  var dist = -1.0;
-	  if (p.equals(p0)) {
-	    dist = 0.0;
-	  } else if (p.equals(p1)) {
-	    if (dx > dy) { dist = dx; } else { dist = dy; }
-	  } else {
-	    var pdx = Math.abs(p.x - p0.x);
-	    var pdy = Math.abs(p.y - p0.y);
-	    if (dx > dy) { dist = pdx; } else { dist = pdy; }
-	    if (dist === 0.0 && !p.equals(p0)) {
-	      dist = Math.max(pdx, pdy);
+
+	    if (field.maxValue !== undefined) {
+	      num = Math.min(num, field.maxValue);
 	    }
+
+	    return num;
 	  }
-	  Assert.isTrue(!(dist === 0.0 && !p.equals(p0)), 'Bad distance calculation');
-	  return dist
-	};
-	LineIntersector.nonRobustComputeEdgeDistance = function nonRobustComputeEdgeDistance (p, p1, p2) {
-	  var dx = p.x - p1.x;
-	  var dy = p.y - p1.y;
-	  var dist = Math.sqrt(dx * dx + dy * dy);
-	  Assert.isTrue(!(dist === 0.0 && !p.equals(p1)), 'Invalid distance calculation');
-	  return dist
-	};
-	staticAccessors$10.DONT_INTERSECT.get = function () { return 0 };
-	staticAccessors$10.DO_INTERSECT.get = function () { return 1 };
-	staticAccessors$10.COLLINEAR.get = function () { return 2 };
-	staticAccessors$10.NO_INTERSECTION.get = function () { return 0 };
-	staticAccessors$10.POINT_INTERSECTION.get = function () { return 1 };
-	staticAccessors$10.COLLINEAR_INTERSECTION.get = function () { return 2 };
-
-	Object.defineProperties( LineIntersector, staticAccessors$10 );
-
-	var RobustLineIntersector = (function (LineIntersector$$1) {
-	  function RobustLineIntersector () {
-	    LineIntersector$$1.apply(this, arguments);
-	  }
-
-	  if ( LineIntersector$$1 ) { RobustLineIntersector.__proto__ = LineIntersector$$1; }
-	  RobustLineIntersector.prototype = Object.create( LineIntersector$$1 && LineIntersector$$1.prototype );
-	  RobustLineIntersector.prototype.constructor = RobustLineIntersector;
-
-	  RobustLineIntersector.prototype.isInSegmentEnvelopes = function isInSegmentEnvelopes (intPt) {
-	    var env0 = new Envelope(this._inputLines[0][0], this._inputLines[0][1]);
-	    var env1 = new Envelope(this._inputLines[1][0], this._inputLines[1][1]);
-	    return env0.contains(intPt) && env1.contains(intPt)
-	  };
-	  RobustLineIntersector.prototype.computeIntersection = function computeIntersection () {
-	    if (arguments.length === 3) {
-	      var p = arguments[0];
-	      var p1 = arguments[1];
-	      var p2 = arguments[2];
-	      this._isProper = false;
-	      if (Envelope.intersects(p1, p2, p)) {
-	        if (CGAlgorithms.orientationIndex(p1, p2, p) === 0 && CGAlgorithms.orientationIndex(p2, p1, p) === 0) {
-	          this._isProper = true;
-	          if (p.equals(p1) || p.equals(p2)) {
-	            this._isProper = false;
-	          }
-	          this._result = LineIntersector$$1.POINT_INTERSECTION;
-	          return null
-	        }
-	      }
-	      this._result = LineIntersector$$1.NO_INTERSECTION;
-	    } else { return LineIntersector$$1.prototype.computeIntersection.apply(this, arguments) }
-	  };
-	  RobustLineIntersector.prototype.normalizeToMinimum = function normalizeToMinimum (n1, n2, n3, n4, normPt) {
-	    normPt.x = this.smallestInAbsValue(n1.x, n2.x, n3.x, n4.x);
-	    normPt.y = this.smallestInAbsValue(n1.y, n2.y, n3.y, n4.y);
-	    n1.x -= normPt.x;
-	    n1.y -= normPt.y;
-	    n2.x -= normPt.x;
-	    n2.y -= normPt.y;
-	    n3.x -= normPt.x;
-	    n3.y -= normPt.y;
-	    n4.x -= normPt.x;
-	    n4.y -= normPt.y;
-	  };
-	  RobustLineIntersector.prototype.safeHCoordinateIntersection = function safeHCoordinateIntersection (p1, p2, q1, q2) {
-	    var intPt = null;
-	    try {
-	      intPt = HCoordinate.intersection(p1, p2, q1, q2);
-	    } catch (e) {
-	      if (e instanceof NotRepresentableException) {
-	        intPt = RobustLineIntersector.nearestEndpoint(p1, p2, q1, q2);
-	      } else { throw e }
-	    } finally {}
-	    return intPt
-	  };
-	  RobustLineIntersector.prototype.intersection = function intersection (p1, p2, q1, q2) {
-	    var intPt = this.intersectionWithNormalization(p1, p2, q1, q2);
-	    if (!this.isInSegmentEnvelopes(intPt)) {
-	      intPt = new Coordinate(RobustLineIntersector.nearestEndpoint(p1, p2, q1, q2));
-	    }
-	    if (this._precisionModel !== null) {
-	      this._precisionModel.makePrecise(intPt);
-	    }
-	    return intPt
-	  };
-	  RobustLineIntersector.prototype.smallestInAbsValue = function smallestInAbsValue (x1, x2, x3, x4) {
-	    var x = x1;
-	    var xabs = Math.abs(x);
-	    if (Math.abs(x2) < xabs) {
-	      x = x2;
-	      xabs = Math.abs(x2);
-	    }
-	    if (Math.abs(x3) < xabs) {
-	      x = x3;
-	      xabs = Math.abs(x3);
-	    }
-	    if (Math.abs(x4) < xabs) {
-	      x = x4;
-	    }
-	    return x
-	  };
-	  RobustLineIntersector.prototype.checkDD = function checkDD (p1, p2, q1, q2, intPt) {
-	    var intPtDD = CGAlgorithmsDD.intersection(p1, p2, q1, q2);
-	    var isIn = this.isInSegmentEnvelopes(intPtDD);
-	    System.out.println('DD in env = ' + isIn + '  --------------------- ' + intPtDD);
-	    if (intPt.distance(intPtDD) > 0.0001) {
-	      System.out.println('Distance = ' + intPt.distance(intPtDD));
-	    }
-	  };
-	  RobustLineIntersector.prototype.intersectionWithNormalization = function intersectionWithNormalization (p1, p2, q1, q2) {
-	    var n1 = new Coordinate(p1);
-	    var n2 = new Coordinate(p2);
-	    var n3 = new Coordinate(q1);
-	    var n4 = new Coordinate(q2);
-	    var normPt = new Coordinate();
-	    this.normalizeToEnvCentre(n1, n2, n3, n4, normPt);
-	    var intPt = this.safeHCoordinateIntersection(n1, n2, n3, n4);
-	    intPt.x += normPt.x;
-	    intPt.y += normPt.y;
-	    return intPt
-	  };
-	  RobustLineIntersector.prototype.computeCollinearIntersection = function computeCollinearIntersection (p1, p2, q1, q2) {
-	    var p1q1p2 = Envelope.intersects(p1, p2, q1);
-	    var p1q2p2 = Envelope.intersects(p1, p2, q2);
-	    var q1p1q2 = Envelope.intersects(q1, q2, p1);
-	    var q1p2q2 = Envelope.intersects(q1, q2, p2);
-	    if (p1q1p2 && p1q2p2) {
-	      this._intPt[0] = q1;
-	      this._intPt[1] = q2;
-	      return LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (q1p1q2 && q1p2q2) {
-	      this._intPt[0] = p1;
-	      this._intPt[1] = p2;
-	      return LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (p1q1p2 && q1p1q2) {
-	      this._intPt[0] = q1;
-	      this._intPt[1] = p1;
-	      return q1.equals(p1) && !p1q2p2 && !q1p2q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (p1q1p2 && q1p2q2) {
-	      this._intPt[0] = q1;
-	      this._intPt[1] = p2;
-	      return q1.equals(p2) && !p1q2p2 && !q1p1q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (p1q2p2 && q1p1q2) {
-	      this._intPt[0] = q2;
-	      this._intPt[1] = p1;
-	      return q2.equals(p1) && !p1q1p2 && !q1p2q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    if (p1q2p2 && q1p2q2) {
-	      this._intPt[0] = q2;
-	      this._intPt[1] = p2;
-	      return q2.equals(p2) && !p1q1p2 && !q1p1q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-	    }
-	    return LineIntersector$$1.NO_INTERSECTION
-	  };
-	  RobustLineIntersector.prototype.normalizeToEnvCentre = function normalizeToEnvCentre (n00, n01, n10, n11, normPt) {
-	    var minX0 = n00.x < n01.x ? n00.x : n01.x;
-	    var minY0 = n00.y < n01.y ? n00.y : n01.y;
-	    var maxX0 = n00.x > n01.x ? n00.x : n01.x;
-	    var maxY0 = n00.y > n01.y ? n00.y : n01.y;
-	    var minX1 = n10.x < n11.x ? n10.x : n11.x;
-	    var minY1 = n10.y < n11.y ? n10.y : n11.y;
-	    var maxX1 = n10.x > n11.x ? n10.x : n11.x;
-	    var maxY1 = n10.y > n11.y ? n10.y : n11.y;
-	    var intMinX = minX0 > minX1 ? minX0 : minX1;
-	    var intMaxX = maxX0 < maxX1 ? maxX0 : maxX1;
-	    var intMinY = minY0 > minY1 ? minY0 : minY1;
-	    var intMaxY = maxY0 < maxY1 ? maxY0 : maxY1;
-	    var intMidX = (intMinX + intMaxX) / 2.0;
-	    var intMidY = (intMinY + intMaxY) / 2.0;
-	    normPt.x = intMidX;
-	    normPt.y = intMidY;
-	    n00.x -= normPt.x;
-	    n00.y -= normPt.y;
-	    n01.x -= normPt.x;
-	    n01.y -= normPt.y;
-	    n10.x -= normPt.x;
-	    n10.y -= normPt.y;
-	    n11.x -= normPt.x;
-	    n11.y -= normPt.y;
-	  };
-	  RobustLineIntersector.prototype.computeIntersect = function computeIntersect (p1, p2, q1, q2) {
-	    this._isProper = false;
-	    if (!Envelope.intersects(p1, p2, q1, q2)) { return LineIntersector$$1.NO_INTERSECTION }
-	    var Pq1 = CGAlgorithms.orientationIndex(p1, p2, q1);
-	    var Pq2 = CGAlgorithms.orientationIndex(p1, p2, q2);
-	    if ((Pq1 > 0 && Pq2 > 0) || (Pq1 < 0 && Pq2 < 0)) {
-	      return LineIntersector$$1.NO_INTERSECTION
-	    }
-	    var Qp1 = CGAlgorithms.orientationIndex(q1, q2, p1);
-	    var Qp2 = CGAlgorithms.orientationIndex(q1, q2, p2);
-	    if ((Qp1 > 0 && Qp2 > 0) || (Qp1 < 0 && Qp2 < 0)) {
-	      return LineIntersector$$1.NO_INTERSECTION
-	    }
-	    var collinear = Pq1 === 0 && Pq2 === 0 && Qp1 === 0 && Qp2 === 0;
-	    if (collinear) {
-	      return this.computeCollinearIntersection(p1, p2, q1, q2)
-	    }
-	    if (Pq1 === 0 || Pq2 === 0 || Qp1 === 0 || Qp2 === 0) {
-	      this._isProper = false;
-	      if (p1.equals2D(q1) || p1.equals2D(q2)) {
-	        this._intPt[0] = p1;
-	      } else if (p2.equals2D(q1) || p2.equals2D(q2)) {
-	        this._intPt[0] = p2;
-	      } else if (Pq1 === 0) {
-	        this._intPt[0] = new Coordinate(q1);
-	      } else if (Pq2 === 0) {
-	        this._intPt[0] = new Coordinate(q2);
-	      } else if (Qp1 === 0) {
-	        this._intPt[0] = new Coordinate(p1);
-	      } else if (Qp2 === 0) {
-	        this._intPt[0] = new Coordinate(p2);
+
+	  function change(onInput) {
+	    return function () {
+	      var t = {};
+	      var val = utilGetSetValue(input);
+	      if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
+
+	      if (!val && Array.isArray(_tags[field.key])) return;
+
+	      if (!onInput) {
+	        if (field.type === 'number' && val) {
+	          var vals = val.split(';');
+	          vals = vals.map(function (v) {
+	            var num = parseFloat(v.trim(), 10);
+	            return isFinite(num) ? clamped(num) : v.trim();
+	          });
+	          val = vals.join(';');
+	        }
+
+	        utilGetSetValue(input, val);
 	      }
-	    } else {
-	      this._isProper = true;
-	      this._intPt[0] = this.intersection(p1, p2, q1, q2);
-	    }
-	    return LineIntersector$$1.POINT_INTERSECTION
-	  };
-	  RobustLineIntersector.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  RobustLineIntersector.prototype.getClass = function getClass () {
-	    return RobustLineIntersector
+
+	      t[field.key] = val || undefined;
+	      dispatch$1.call('change', this, t, onInput);
+	    };
+	  }
+
+	  i.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return i;
 	  };
-	  RobustLineIntersector.nearestEndpoint = function nearestEndpoint (p1, p2, q1, q2) {
-	    var nearestPt = p1;
-	    var minDist = CGAlgorithms.distancePointLine(p1, q1, q2);
-	    var dist = CGAlgorithms.distancePointLine(p2, q1, q2);
-	    if (dist < minDist) {
-	      minDist = dist;
-	      nearestPt = p2;
-	    }
-	    dist = CGAlgorithms.distancePointLine(q1, p1, p2);
-	    if (dist < minDist) {
-	      minDist = dist;
-	      nearestPt = q1;
-	    }
-	    dist = CGAlgorithms.distancePointLine(q2, p1, p2);
-	    if (dist < minDist) {
-	      minDist = dist;
-	      nearestPt = q2;
+
+	  i.tags = function (tags) {
+	    _tags = tags;
+	    var isMixed = Array.isArray(tags[field.key]);
+	    utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);
+
+	    if (outlinkButton && !outlinkButton.empty()) {
+	      var disabled = !validIdentifierValueForLink();
+	      outlinkButton.classed('disabled', disabled);
 	    }
-	    return nearestPt
 	  };
 
-	  return RobustLineIntersector;
-	}(LineIntersector));
+	  i.focus = function () {
+	    var node = input.node();
+	    if (node) node.focus();
+	  };
 
-	var RobustDeterminant = function RobustDeterminant () {};
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	RobustDeterminant.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	RobustDeterminant.prototype.getClass = function getClass () {
-	  return RobustDeterminant
-	};
-	RobustDeterminant.orientationIndex = function orientationIndex (p1, p2, q) {
-	  var dx1 = p2.x - p1.x;
-	  var dy1 = p2.y - p1.y;
-	  var dx2 = q.x - p2.x;
-	  var dy2 = q.y - p2.y;
-	  return RobustDeterminant.signOfDet2x2(dx1, dy1, dx2, dy2)
-	};
-	RobustDeterminant.signOfDet2x2 = function signOfDet2x2 (x1, y1, x2, y2) {
-	  var sign = null;
-	  var swap = null;
-	  var k = null;
-	  sign = 1;
-	  if (x1 === 0.0 || y2 === 0.0) {
-	    if (y1 === 0.0 || x2 === 0.0) {
-	      return 0
-	    } else if (y1 > 0) {
-	      if (x2 > 0) {
-	        return -sign
-	      } else {
-	        return sign
-	      }
-	    } else {
-	      if (x2 > 0) {
-	        return sign
-	      } else {
-	        return -sign
-	      }
-	    }
+	  return utilRebind(i, dispatch$1, 'on');
+	}
+
+	function uiFieldAccess(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var items = select(null);
+
+	  var _tags;
+
+	  function access(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var list = wrap.selectAll('ul').data([0]);
+	    list = list.enter().append('ul').attr('class', 'rows').merge(list);
+	    items = list.selectAll('li').data(field.keys); // Enter
+
+	    var enter = items.enter().append('li').attr('class', function (d) {
+	      return 'labeled-input preset-access-' + d;
+	    });
+	    enter.append('span').attr('class', 'label preset-label-access').attr('for', function (d) {
+	      return 'preset-input-access-' + d;
+	    }).html(function (d) {
+	      return field.t.html('types.' + d);
+	    });
+	    enter.append('div').attr('class', 'preset-input-access-wrap').append('input').attr('type', 'text').attr('class', function (d) {
+	      return 'preset-input-access preset-input-access-' + d;
+	    }).call(utilNoAuto).each(function (d) {
+	      select(this).call(uiCombobox(context, 'access-' + d).data(access.options(d)));
+	    }); // Update
+
+	    items = items.merge(enter);
+	    wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
 	  }
-	  if (y1 === 0.0 || x2 === 0.0) {
-	    if (y2 > 0) {
-	      if (x1 > 0) {
-	        return sign
-	      } else {
-	        return -sign
-	      }
-	    } else {
-	      if (x1 > 0) {
-	        return -sign
-	      } else {
-	        return sign
-	      }
-	    }
+
+	  function change(d) {
+	    var tag = {};
+	    var value = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
+
+	    if (!value && typeof _tags[d] !== 'string') return;
+	    tag[d] = value || undefined;
+	    dispatch$1.call('change', this, tag);
 	  }
-	  if (y1 > 0.0) {
-	    if (y2 > 0.0) {
-	      if (y1 <= y2) ; else {
-	        sign = -sign;
-	        swap = x1;
-	        x1 = x2;
-	        x2 = swap;
-	        swap = y1;
-	        y1 = y2;
-	        y2 = swap;
-	      }
-	    } else {
-	      if (y1 <= -y2) {
-	        sign = -sign;
-	        x2 = -x2;
-	        y2 = -y2;
-	      } else {
-	        swap = x1;
-	        x1 = -x2;
-	        x2 = swap;
-	        swap = y1;
-	        y1 = -y2;
-	        y2 = swap;
+
+	  access.options = function (type) {
+	    var options = ['no', 'permissive', 'private', 'permit', 'destination'];
+
+	    if (type !== 'access') {
+	      options.unshift('yes');
+	      options.push('designated');
+
+	      if (type === 'bicycle') {
+	        options.push('dismount');
 	      }
 	    }
-	  } else {
-	    if (y2 > 0.0) {
-	      if (-y1 <= y2) {
-	        sign = -sign;
-	        x1 = -x1;
-	        y1 = -y1;
-	      } else {
-	        swap = -x1;
-	        x1 = x2;
-	        x2 = swap;
-	        swap = -y1;
-	        y1 = y2;
-	        y2 = swap;
+
+	    return options.map(function (option) {
+	      return {
+	        title: field.t('options.' + option + '.description'),
+	        value: option
+	      };
+	    });
+	  };
+
+	  var placeholdersByHighway = {
+	    footway: {
+	      foot: 'designated',
+	      motor_vehicle: 'no'
+	    },
+	    steps: {
+	      foot: 'yes',
+	      motor_vehicle: 'no',
+	      bicycle: 'no',
+	      horse: 'no'
+	    },
+	    pedestrian: {
+	      foot: 'yes',
+	      motor_vehicle: 'no'
+	    },
+	    cycleway: {
+	      motor_vehicle: 'no',
+	      bicycle: 'designated'
+	    },
+	    bridleway: {
+	      motor_vehicle: 'no',
+	      horse: 'designated'
+	    },
+	    path: {
+	      foot: 'yes',
+	      motor_vehicle: 'no',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    motorway: {
+	      foot: 'no',
+	      motor_vehicle: 'yes',
+	      bicycle: 'no',
+	      horse: 'no'
+	    },
+	    trunk: {
+	      motor_vehicle: 'yes'
+	    },
+	    primary: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    secondary: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    tertiary: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    residential: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    unclassified: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    service: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    motorway_link: {
+	      foot: 'no',
+	      motor_vehicle: 'yes',
+	      bicycle: 'no',
+	      horse: 'no'
+	    },
+	    trunk_link: {
+	      motor_vehicle: 'yes'
+	    },
+	    primary_link: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    secondary_link: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    },
+	    tertiary_link: {
+	      foot: 'yes',
+	      motor_vehicle: 'yes',
+	      bicycle: 'yes',
+	      horse: 'yes'
+	    }
+	  };
+
+	  access.tags = function (tags) {
+	    _tags = tags;
+	    utilGetSetValue(items.selectAll('.preset-input-access'), function (d) {
+	      return typeof tags[d] === 'string' ? tags[d] : '';
+	    }).classed('mixed', function (d) {
+	      return tags[d] && Array.isArray(tags[d]);
+	    }).attr('title', function (d) {
+	      return tags[d] && Array.isArray(tags[d]) && tags[d].filter(Boolean).join('\n');
+	    }).attr('placeholder', function (d) {
+	      if (tags[d] && Array.isArray(tags[d])) {
+	        return _t('inspector.multiple_values');
 	      }
-	    } else {
-	      if (y1 >= y2) {
-	        x1 = -x1;
-	        y1 = -y1;
-	        x2 = -x2;
-	        y2 = -y2;
-	      } else {
-	        sign = -sign;
-	        swap = -x1;
-	        x1 = -x2;
-	        x2 = swap;
-	        swap = -y1;
-	        y1 = -y2;
-	        y2 = swap;
+
+	      if (d === 'access') {
+	        return 'yes';
 	      }
-	    }
-	  }
-	  if (x1 > 0.0) {
-	    if (x2 > 0.0) {
-	      if (x1 <= x2) ; else {
-	        return sign
+
+	      if (tags.access && typeof tags.access === 'string') {
+	        return tags.access;
 	      }
-	    } else {
-	      return sign
-	    }
-	  } else {
-	    if (x2 > 0.0) {
-	      return -sign
-	    } else {
-	      if (x1 >= x2) {
-	        sign = -sign;
-	        x1 = -x1;
-	        x2 = -x2;
-	      } else {
-	        return -sign
+
+	      if (tags.highway) {
+	        if (typeof tags.highway === 'string') {
+	          if (placeholdersByHighway[tags.highway] && placeholdersByHighway[tags.highway][d]) {
+	            return placeholdersByHighway[tags.highway][d];
+	          }
+	        } else {
+	          var impliedAccesses = tags.highway.filter(Boolean).map(function (highwayVal) {
+	            return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
+	          }).filter(Boolean);
+
+	          if (impliedAccesses.length === tags.highway.length && new Set(impliedAccesses).size === 1) {
+	            // if all the highway values have the same implied access for this type then use that
+	            return impliedAccesses[0];
+	          }
+	        }
 	      }
+
+	      return field.placeholder();
+	    });
+	  };
+
+	  access.focus = function () {
+	    items.selectAll('.preset-input-access').node().focus();
+	  };
+
+	  return utilRebind(access, dispatch$1, 'on');
+	}
+
+	function uiFieldAddress(field, context) {
+	  var dispatch$1 = dispatch('change');
+
+	  var _selection = select(null);
+
+	  var _wrap = select(null);
+
+	  var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings
+
+	  var _entityIDs = [];
+
+	  var _tags;
+
+	  var _countryCode;
+
+	  var _addressFormats = [{
+	    format: [['housenumber', 'street'], ['city', 'postcode']]
+	  }];
+	  _mainFileFetcher.get('address_formats').then(function (d) {
+	    _addressFormats = d;
+
+	    if (!_selection.empty()) {
+	      _selection.call(address);
 	    }
-	  }
-	  while (true) {
-	    k = Math.floor(x2 / x1);
-	    x2 = x2 - k * x1;
-	    y2 = y2 - k * y1;
-	    if (y2 < 0.0) {
-	      return -sign
-	    }
-	    if (y2 > y1) {
-	      return sign
-	    }
-	    if (x1 > x2 + x2) {
-	      if (y1 < y2 + y2) {
-	        return sign
-	      }
-	    } else {
-	      if (y1 > y2 + y2) {
-	        return -sign
-	      } else {
-	        x2 = x1 - x2;
-	        y2 = y1 - y2;
-	        sign = -sign;
-	      }
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+
+	  function getNearStreets() {
+	    var extent = combinedEntityExtent();
+	    var l = extent.center();
+	    var box = geoExtent(l).padByMeters(200);
+	    var streets = context.history().intersects(box).filter(isAddressable).map(function (d) {
+	      var loc = context.projection([(extent[0][0] + extent[1][0]) / 2, (extent[0][1] + extent[1][1]) / 2]);
+	      var choice = geoChooseEdge(context.graph().childNodes(d), loc, context.projection);
+	      return {
+	        title: d.tags.name,
+	        value: d.tags.name,
+	        dist: choice.distance
+	      };
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    });
+	    return utilArrayUniqBy(streets, 'value');
+
+	    function isAddressable(d) {
+	      return d.tags.highway && d.tags.name && d.type === 'way';
 	    }
-	    if (y2 === 0.0) {
-	      if (x2 === 0.0) {
-	        return 0
-	      } else {
-	        return -sign
+	  }
+
+	  function getNearCities() {
+	    var extent = combinedEntityExtent();
+	    var l = extent.center();
+	    var box = geoExtent(l).padByMeters(200);
+	    var cities = context.history().intersects(box).filter(isAddressable).map(function (d) {
+	      return {
+	        title: d.tags['addr:city'] || d.tags.name,
+	        value: d.tags['addr:city'] || d.tags.name,
+	        dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
+	      };
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    });
+	    return utilArrayUniqBy(cities, 'value');
+
+	    function isAddressable(d) {
+	      if (d.tags.name) {
+	        if (d.tags.admin_level === '8' && d.tags.boundary === 'administrative') return true;
+	        if (d.tags.border_type === 'city') return true;
+	        if (d.tags.place === 'city' || d.tags.place === 'town' || d.tags.place === 'village') return true;
 	      }
+
+	      if (d.tags['addr:city']) return true;
+	      return false;
 	    }
-	    if (x2 === 0.0) {
-	      return sign
+	  }
+
+	  function getNearValues(key) {
+	    var extent = combinedEntityExtent();
+	    var l = extent.center();
+	    var box = geoExtent(l).padByMeters(200);
+	    var results = context.history().intersects(box).filter(function hasTag(d) {
+	      return _entityIDs.indexOf(d.id) === -1 && d.tags[key];
+	    }).map(function (d) {
+	      return {
+	        title: d.tags[key],
+	        value: d.tags[key],
+	        dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
+	      };
+	    }).sort(function (a, b) {
+	      return a.dist - b.dist;
+	    });
+	    return utilArrayUniqBy(results, 'value');
+	  }
+
+	  function updateForCountryCode() {
+	    if (!_countryCode) return;
+	    var addressFormat;
+
+	    for (var i = 0; i < _addressFormats.length; i++) {
+	      var format = _addressFormats[i];
+
+	      if (!format.countryCodes) {
+	        addressFormat = format; // choose the default format, keep going
+	      } else if (format.countryCodes.indexOf(_countryCode) !== -1) {
+	        addressFormat = format; // choose the country format, stop here
+
+	        break;
+	      }
 	    }
-	    k = Math.floor(x1 / x2);
-	    x1 = x1 - k * x2;
-	    y1 = y1 - k * y2;
-	    if (y1 < 0.0) {
-	      return sign
+
+	    var dropdowns = addressFormat.dropdowns || ['city', 'county', 'country', 'district', 'hamlet', 'neighbourhood', 'place', 'postcode', 'province', 'quarter', 'state', 'street', 'subdistrict', 'suburb'];
+	    var widths = addressFormat.widths || {
+	      housenumber: 1 / 3,
+	      street: 2 / 3,
+	      city: 2 / 3,
+	      state: 1 / 4,
+	      postcode: 1 / 3
+	    };
+
+	    function row(r) {
+	      // Normalize widths.
+	      var total = r.reduce(function (sum, key) {
+	        return sum + (widths[key] || 0.5);
+	      }, 0);
+	      return r.map(function (key) {
+	        return {
+	          id: key,
+	          width: (widths[key] || 0.5) / total
+	        };
+	      });
 	    }
-	    if (y1 > y2) {
-	      return -sign
+
+	    var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
+	      return d.toString();
+	    });
+
+	    rows.exit().remove();
+	    rows.enter().append('div').attr('class', 'addr-row').selectAll('input').data(row).enter().append('input').property('type', 'text').call(updatePlaceholder).attr('class', function (d) {
+	      return 'addr-' + d.id;
+	    }).call(utilNoAuto).each(addDropdown).style('width', function (d) {
+	      return d.width * 100 + '%';
+	    });
+
+	    function addDropdown(d) {
+	      if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown
+
+	      var nearValues = d.id === 'street' ? getNearStreets : d.id === 'city' ? getNearCities : getNearValues;
+	      select(this).call(uiCombobox(context, 'address-' + d.id).minItems(1).caseSensitive(true).fetcher(function (value, callback) {
+	        callback(nearValues('addr:' + d.id));
+	      }));
 	    }
-	    if (x2 > x1 + x1) {
-	      if (y2 < y1 + y1) {
-	        return -sign
-	      }
-	    } else {
-	      if (y2 > y1 + y1) {
-	        return sign
+
+	    _wrap.selectAll('input').on('blur', change()).on('change', change());
+
+	    _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));
+
+	    if (_tags) updateTags(_tags);
+	  }
+
+	  function address(selection) {
+	    _selection = selection;
+	    _wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    _wrap = _wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(_wrap);
+	    var extent = combinedEntityExtent();
+
+	    if (extent) {
+	      var countryCode;
+
+	      if (context.inIntro()) {
+	        // localize the address format for the walkthrough
+	        countryCode = _t('intro.graph.countrycode');
 	      } else {
-	        x1 = x2 - x1;
-	        y1 = y2 - y1;
-	        sign = -sign;
+	        var center = extent.center();
+	        countryCode = iso1A2Code(center);
 	      }
-	    }
-	    if (y1 === 0.0) {
-	      if (x1 === 0.0) {
-	        return 0
-	      } else {
-	        return sign
+
+	      if (countryCode) {
+	        _countryCode = countryCode.toLowerCase();
+	        updateForCountryCode();
 	      }
 	    }
-	    if (x1 === 0.0) {
-	      return -sign
-	    }
 	  }
-	};
 
-	var RayCrossingCounter = function RayCrossingCounter () {
-	  this._p = null;
-	  this._crossingCount = 0;
-	  this._isPointOnSegment = false;
-	  var p = arguments[0];
-	  this._p = p;
-	};
-	RayCrossingCounter.prototype.countSegment = function countSegment (p1, p2) {
-	  if (p1.x < this._p.x && p2.x < this._p.x) { return null }
-	  if (this._p.x === p2.x && this._p.y === p2.y) {
-	    this._isPointOnSegment = true;
-	    return null
-	  }
-	  if (p1.y === this._p.y && p2.y === this._p.y) {
-	    var minx = p1.x;
-	    var maxx = p2.x;
-	    if (minx > maxx) {
-	      minx = p2.x;
-	      maxx = p1.x;
-	    }
-	    if (this._p.x >= minx && this._p.x <= maxx) {
-	      this._isPointOnSegment = true;
-	    }
-	    return null
-	  }
-	  if ((p1.y > this._p.y && p2.y <= this._p.y) || (p2.y > this._p.y && p1.y <= this._p.y)) {
-	    var x1 = p1.x - this._p.x;
-	    var y1 = p1.y - this._p.y;
-	    var x2 = p2.x - this._p.x;
-	    var y2 = p2.y - this._p.y;
-	    var xIntSign = RobustDeterminant.signOfDet2x2(x1, y1, x2, y2);
-	    if (xIntSign === 0.0) {
-	      this._isPointOnSegment = true;
-	      return null
-	    }
-	    if (y2 < y1) { xIntSign = -xIntSign; }
-	    if (xIntSign > 0.0) {
-	      this._crossingCount++;
-	    }
-	  }
-	};
-	RayCrossingCounter.prototype.isPointInPolygon = function isPointInPolygon () {
-	  return this.getLocation() !== Location.EXTERIOR
-	};
-	RayCrossingCounter.prototype.getLocation = function getLocation () {
-	  if (this._isPointOnSegment) { return Location.BOUNDARY }
-	  if (this._crossingCount % 2 === 1) {
-	    return Location.INTERIOR
-	  }
-	  return Location.EXTERIOR
-	};
-	RayCrossingCounter.prototype.isOnSegment = function isOnSegment () {
-	  return this._isPointOnSegment
-	};
-	RayCrossingCounter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	RayCrossingCounter.prototype.getClass = function getClass () {
-	  return RayCrossingCounter
-	};
-	RayCrossingCounter.locatePointInRing = function locatePointInRing () {
-	  if (arguments[0] instanceof Coordinate && hasInterface(arguments[1], CoordinateSequence)) {
-	    var p = arguments[0];
-	    var ring = arguments[1];
-	    var counter = new RayCrossingCounter(p);
-	    var p1 = new Coordinate();
-	    var p2 = new Coordinate();
-	    for (var i = 1; i < ring.size(); i++) {
-	      ring.getCoordinate(i, p1);
-	      ring.getCoordinate(i - 1, p2);
-	      counter.countSegment(p1, p2);
-	      if (counter.isOnSegment()) { return counter.getLocation() }
-	    }
-	    return counter.getLocation()
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Array) {
-	    var p$1 = arguments[0];
-	    var ring$1 = arguments[1];
-	    var counter$1 = new RayCrossingCounter(p$1);
-	    for (var i$1 = 1; i$1 < ring$1.length; i$1++) {
-	      var p1$1 = ring$1[i$1];
-	      var p2$1 = ring$1[i$1 - 1];
-	      counter$1.countSegment(p1$1, p2$1);
-	      if (counter$1.isOnSegment()) { return counter$1.getLocation() }
-	    }
-	    return counter$1.getLocation()
-	  }
-	};
+	  function change(onInput) {
+	    return function () {
+	      var tags = {};
 
-	var CGAlgorithms = function CGAlgorithms () {};
+	      _wrap.selectAll('input').each(function (subfield) {
+	        var key = field.key + ':' + subfield.id;
+	        var value = this.value;
+	        if (!onInput) value = context.cleanTagValue(value); // don't override multiple values with blank string
 
-	var staticAccessors$3 = { CLOCKWISE: { configurable: true },RIGHT: { configurable: true },COUNTERCLOCKWISE: { configurable: true },LEFT: { configurable: true },COLLINEAR: { configurable: true },STRAIGHT: { configurable: true } };
+	        if (Array.isArray(_tags[key]) && !value) return;
+	        tags[key] = value || undefined;
+	      });
 
-	CGAlgorithms.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CGAlgorithms.prototype.getClass = function getClass () {
-	  return CGAlgorithms
-	};
-	CGAlgorithms.orientationIndex = function orientationIndex (p1, p2, q) {
-	  return CGAlgorithmsDD.orientationIndex(p1, p2, q)
-	};
-	CGAlgorithms.signedArea = function signedArea () {
-	  if (arguments[0] instanceof Array) {
-	    var ring = arguments[0];
-	    if (ring.length < 3) { return 0.0 }
-	    var sum = 0.0;
-	    var x0 = ring[0].x;
-	    for (var i = 1; i < ring.length - 1; i++) {
-	      var x = ring[i].x - x0;
-	      var y1 = ring[i + 1].y;
-	      var y2 = ring[i - 1].y;
-	      sum += x * (y2 - y1);
-	    }
-	    return sum / 2.0
-	  } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	    var ring$1 = arguments[0];
-	    var n = ring$1.size();
-	    if (n < 3) { return 0.0 }
-	    var p0 = new Coordinate();
-	    var p1 = new Coordinate();
-	    var p2 = new Coordinate();
-	    ring$1.getCoordinate(0, p1);
-	    ring$1.getCoordinate(1, p2);
-	    var x0$1 = p1.x;
-	    p2.x -= x0$1;
-	    var sum$1 = 0.0;
-	    for (var i$1 = 1; i$1 < n - 1; i$1++) {
-	      p0.y = p1.y;
-	      p1.x = p2.x;
-	      p1.y = p2.y;
-	      ring$1.getCoordinate(i$1 + 1, p2);
-	      p2.x -= x0$1;
-	      sum$1 += p1.x * (p0.y - p2.y);
-	    }
-	    return sum$1 / 2.0
+	      dispatch$1.call('change', this, tags, onInput);
+	    };
 	  }
-	};
-	CGAlgorithms.distanceLineLine = function distanceLineLine (A, B, C, D) {
-	  if (A.equals(B)) { return CGAlgorithms.distancePointLine(A, C, D) }
-	  if (C.equals(D)) { return CGAlgorithms.distancePointLine(D, A, B) }
-	  var noIntersection = false;
-	  if (!Envelope.intersects(A, B, C, D)) {
-	    noIntersection = true;
-	  } else {
-	    var denom = (B.x - A.x) * (D.y - C.y) - (B.y - A.y) * (D.x - C.x);
-	    if (denom === 0) {
-	      noIntersection = true;
-	    } else {
-	      var rNumb = (A.y - C.y) * (D.x - C.x) - (A.x - C.x) * (D.y - C.y);
-	      var sNum = (A.y - C.y) * (B.x - A.x) - (A.x - C.x) * (B.y - A.y);
-	      var s = sNum / denom;
-	      var r = rNumb / denom;
-	      if (r < 0 || r > 1 || s < 0 || s > 1) {
-	        noIntersection = true;
+
+	  function updatePlaceholder(inputSelection) {
+	    return inputSelection.attr('placeholder', function (subfield) {
+	      if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
+	        return _t('inspector.multiple_values');
 	      }
-	    }
-	  }
-	  if (noIntersection) {
-	    return MathUtil.min(CGAlgorithms.distancePointLine(A, C, D), CGAlgorithms.distancePointLine(B, C, D), CGAlgorithms.distancePointLine(C, A, B), CGAlgorithms.distancePointLine(D, A, B))
-	  }
-	  return 0.0
-	};
-	CGAlgorithms.isPointInRing = function isPointInRing (p, ring) {
-	  return CGAlgorithms.locatePointInRing(p, ring) !== Location.EXTERIOR
-	};
-	CGAlgorithms.computeLength = function computeLength (pts) {
-	  var n = pts.size();
-	  if (n <= 1) { return 0.0 }
-	  var len = 0.0;
-	  var p = new Coordinate();
-	  pts.getCoordinate(0, p);
-	  var x0 = p.x;
-	  var y0 = p.y;
-	  for (var i = 1; i < n; i++) {
-	    pts.getCoordinate(i, p);
-	    var x1 = p.x;
-	    var y1 = p.y;
-	    var dx = x1 - x0;
-	    var dy = y1 - y0;
-	    len += Math.sqrt(dx * dx + dy * dy);
-	    x0 = x1;
-	    y0 = y1;
-	  }
-	  return len
-	};
-	CGAlgorithms.isCCW = function isCCW (ring) {
-	  var nPts = ring.length - 1;
-	  if (nPts < 3) { throw new IllegalArgumentException('Ring has fewer than 4 points, so orientation cannot be determined') }
-	  var hiPt = ring[0];
-	  var hiIndex = 0;
-	  for (var i = 1; i <= nPts; i++) {
-	    var p = ring[i];
-	    if (p.y > hiPt.y) {
-	      hiPt = p;
-	      hiIndex = i;
-	    }
-	  }
-	  var iPrev = hiIndex;
-	  do {
-	    iPrev = iPrev - 1;
-	    if (iPrev < 0) { iPrev = nPts; }
-	  } while (ring[iPrev].equals2D(hiPt) && iPrev !== hiIndex)
-	  var iNext = hiIndex;
-	  do {
-	    iNext = (iNext + 1) % nPts;
-	  } while (ring[iNext].equals2D(hiPt) && iNext !== hiIndex)
-	  var prev = ring[iPrev];
-	  var next = ring[iNext];
-	  if (prev.equals2D(hiPt) || next.equals2D(hiPt) || prev.equals2D(next)) { return false }
-	  var disc = CGAlgorithms.computeOrientation(prev, hiPt, next);
-	  var isCCW = false;
-	  if (disc === 0) {
-	    isCCW = prev.x > next.x;
-	  } else {
-	    isCCW = disc > 0;
+
+	      if (_countryCode) {
+	        var localkey = subfield.id + '!' + _countryCode;
+	        var tkey = addrField.strings.placeholders[localkey] ? localkey : subfield.id;
+	        return addrField.t('placeholders.' + tkey);
+	      }
+	    });
 	  }
-	  return isCCW
-	};
-	CGAlgorithms.locatePointInRing = function locatePointInRing (p, ring) {
-	  return RayCrossingCounter.locatePointInRing(p, ring)
-	};
-	CGAlgorithms.distancePointLinePerpendicular = function distancePointLinePerpendicular (p, A, B) {
-	  var len2 = (B.x - A.x) * (B.x - A.x) + (B.y - A.y) * (B.y - A.y);
-	  var s = ((A.y - p.y) * (B.x - A.x) - (A.x - p.x) * (B.y - A.y)) / len2;
-	  return Math.abs(s) * Math.sqrt(len2)
-	};
-	CGAlgorithms.computeOrientation = function computeOrientation (p1, p2, q) {
-	  return CGAlgorithms.orientationIndex(p1, p2, q)
-	};
-	CGAlgorithms.distancePointLine = function distancePointLine () {
-	  if (arguments.length === 2) {
-	    var p = arguments[0];
-	    var line = arguments[1];
-	    if (line.length === 0) { throw new IllegalArgumentException('Line array must contain at least one vertex') }
-	    var minDistance = p.distance(line[0]);
-	    for (var i = 0; i < line.length - 1; i++) {
-	      var dist = CGAlgorithms.distancePointLine(p, line[i], line[i + 1]);
-	      if (dist < minDistance) {
-	        minDistance = dist;
-	      }
-	    }
-	    return minDistance
-	  } else if (arguments.length === 3) {
-	    var p$1 = arguments[0];
-	    var A = arguments[1];
-	    var B = arguments[2];
-	    if (A.x === B.x && A.y === B.y) { return p$1.distance(A) }
-	    var len2 = (B.x - A.x) * (B.x - A.x) + (B.y - A.y) * (B.y - A.y);
-	    var r = ((p$1.x - A.x) * (B.x - A.x) + (p$1.y - A.y) * (B.y - A.y)) / len2;
-	    if (r <= 0.0) { return p$1.distance(A) }
-	    if (r >= 1.0) { return p$1.distance(B) }
-	    var s = ((A.y - p$1.y) * (B.x - A.x) - (A.x - p$1.x) * (B.y - A.y)) / len2;
-	    return Math.abs(s) * Math.sqrt(len2)
+
+	  function updateTags(tags) {
+	    utilGetSetValue(_wrap.selectAll('input'), function (subfield) {
+	      var val = tags[field.key + ':' + subfield.id];
+	      return typeof val === 'string' ? val : '';
+	    }).attr('title', function (subfield) {
+	      var val = tags[field.key + ':' + subfield.id];
+	      return val && Array.isArray(val) && val.filter(Boolean).join('\n');
+	    }).classed('mixed', function (subfield) {
+	      return Array.isArray(tags[field.key + ':' + subfield.id]);
+	    }).call(updatePlaceholder);
 	  }
-	};
-	CGAlgorithms.isOnLine = function isOnLine (p, pt) {
-	  var lineIntersector = new RobustLineIntersector();
-	  for (var i = 1; i < pt.length; i++) {
-	    var p0 = pt[i - 1];
-	    var p1 = pt[i];
-	    lineIntersector.computeIntersection(p, p0, p1);
-	    if (lineIntersector.hasIntersection()) {
-	      return true
-	    }
+
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
 	  }
-	  return false
-	};
-	staticAccessors$3.CLOCKWISE.get = function () { return -1 };
-	staticAccessors$3.RIGHT.get = function () { return CGAlgorithms.CLOCKWISE };
-	staticAccessors$3.COUNTERCLOCKWISE.get = function () { return 1 };
-	staticAccessors$3.LEFT.get = function () { return CGAlgorithms.COUNTERCLOCKWISE };
-	staticAccessors$3.COLLINEAR.get = function () { return 0 };
-	staticAccessors$3.STRAIGHT.get = function () { return CGAlgorithms.COLLINEAR };
 
-	Object.defineProperties( CGAlgorithms, staticAccessors$3 );
+	  address.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return address;
+	  };
 
-	var GeometryComponentFilter = function GeometryComponentFilter () {};
+	  address.tags = function (tags) {
+	    _tags = tags;
+	    updateTags(tags);
+	  };
 
-	GeometryComponentFilter.prototype.filter = function filter (geom) {};
-	GeometryComponentFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryComponentFilter.prototype.getClass = function getClass () {
-	  return GeometryComponentFilter
-	};
+	  address.focus = function () {
+	    var node = _wrap.selectAll('input').node();
 
-	var Geometry = function Geometry () {
-	  var factory = arguments[0];
+	    if (node) node.focus();
+	  };
 
-	  this._envelope = null;
-	  this._factory = null;
-	  this._SRID = null;
-	  this._userData = null;
-	  this._factory = factory;
-	  this._SRID = factory.getSRID();
-	};
+	  return utilRebind(address, dispatch$1, 'on');
+	}
 
-	var staticAccessors$11 = { serialVersionUID: { configurable: true },SORTINDEX_POINT: { configurable: true },SORTINDEX_MULTIPOINT: { configurable: true },SORTINDEX_LINESTRING: { configurable: true },SORTINDEX_LINEARRING: { configurable: true },SORTINDEX_MULTILINESTRING: { configurable: true },SORTINDEX_POLYGON: { configurable: true },SORTINDEX_MULTIPOLYGON: { configurable: true },SORTINDEX_GEOMETRYCOLLECTION: { configurable: true },geometryChangedFilter: { configurable: true } };
-	Geometry.prototype.isGeometryCollection = function isGeometryCollection () {
-	  return this.getSortIndex() === Geometry.SORTINDEX_GEOMETRYCOLLECTION
-	};
-	Geometry.prototype.getFactory = function getFactory () {
-	  return this._factory
-	};
-	Geometry.prototype.getGeometryN = function getGeometryN (n) {
-	  return this
-	};
-	Geometry.prototype.getArea = function getArea () {
-	  return 0.0
-	};
-	Geometry.prototype.isRectangle = function isRectangle () {
-	  return false
-	};
-	Geometry.prototype.equals = function equals () {
-	  if (arguments[0] instanceof Geometry) {
-	    var g$1 = arguments[0];
-	    if (g$1 === null) { return false }
-	    return this.equalsTopo(g$1)
-	  } else if (arguments[0] instanceof Object) {
-	    var o = arguments[0];
-	    if (!(o instanceof Geometry)) { return false }
-	    var g = o;
-	    return this.equalsExact(g)
-	  }
-	};
-	Geometry.prototype.equalsExact = function equalsExact (other) {
-	  return this === other || this.equalsExact(other, 0)
-	};
-	Geometry.prototype.geometryChanged = function geometryChanged () {
-	  this.apply(Geometry.geometryChangedFilter);
-	};
-	Geometry.prototype.geometryChangedAction = function geometryChangedAction () {
-	  this._envelope = null;
-	};
-	Geometry.prototype.equalsNorm = function equalsNorm (g) {
-	  if (g === null) { return false }
-	  return this.norm().equalsExact(g.norm())
-	};
-	Geometry.prototype.getLength = function getLength () {
-	  return 0.0
-	};
-	Geometry.prototype.getNumGeometries = function getNumGeometries () {
-	  return 1
-	};
-	Geometry.prototype.compareTo = function compareTo () {
-	  if (arguments.length === 1) {
-	    var o = arguments[0];
-	    var other = o;
-	    if (this.getSortIndex() !== other.getSortIndex()) {
-	      return this.getSortIndex() - other.getSortIndex()
-	    }
-	    if (this.isEmpty() && other.isEmpty()) {
-	      return 0
-	    }
-	    if (this.isEmpty()) {
-	      return -1
-	    }
-	    if (other.isEmpty()) {
-	      return 1
-	    }
-	    return this.compareToSameClass(o)
-	  } else if (arguments.length === 2) {
-	    var other$1 = arguments[0];
-	    var comp = arguments[1];
-	    if (this.getSortIndex() !== other$1.getSortIndex()) {
-	      return this.getSortIndex() - other$1.getSortIndex()
-	    }
-	    if (this.isEmpty() && other$1.isEmpty()) {
-	      return 0
-	    }
-	    if (this.isEmpty()) {
-	      return -1
-	    }
-	    if (other$1.isEmpty()) {
-	      return 1
+	function uiFieldCycleway(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var items = select(null);
+	  var wrap = select(null);
+
+	  var _tags;
+
+	  function cycleway(selection) {
+	    function stripcolon(s) {
+	      return s.replace(':', '');
 	    }
-	    return this.compareToSameClass(other$1, comp)
-	  }
-	};
-	Geometry.prototype.getUserData = function getUserData () {
-	  return this._userData
-	};
-	Geometry.prototype.getSRID = function getSRID () {
-	  return this._SRID
-	};
-	Geometry.prototype.getEnvelope = function getEnvelope () {
-	  return this.getFactory().toGeometry(this.getEnvelopeInternal())
-	};
-	Geometry.prototype.checkNotGeometryCollection = function checkNotGeometryCollection (g) {
-	  if (g.getSortIndex() === Geometry.SORTINDEX_GEOMETRYCOLLECTION) {
-	    throw new IllegalArgumentException('This method does not support GeometryCollection arguments')
-	  }
-	};
-	Geometry.prototype.equal = function equal (a, b, tolerance) {
-	  if (tolerance === 0) {
-	    return a.equals(b)
-	  }
-	  return a.distance(b) <= tolerance
-	};
-	Geometry.prototype.norm = function norm () {
-	  var copy = this.copy();
-	  copy.normalize();
-	  return copy
-	};
-	Geometry.prototype.getPrecisionModel = function getPrecisionModel () {
-	  return this._factory.getPrecisionModel()
-	};
-	Geometry.prototype.getEnvelopeInternal = function getEnvelopeInternal () {
-	  if (this._envelope === null) {
-	    this._envelope = this.computeEnvelopeInternal();
+
+	    wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var div = wrap.selectAll('ul').data([0]);
+	    div = div.enter().append('ul').attr('class', 'rows').merge(div);
+	    var keys = ['cycleway:left', 'cycleway:right'];
+	    items = div.selectAll('li').data(keys);
+	    var enter = items.enter().append('li').attr('class', function (d) {
+	      return 'labeled-input preset-cycleway-' + stripcolon(d);
+	    });
+	    enter.append('span').attr('class', 'label preset-label-cycleway').attr('for', function (d) {
+	      return 'preset-input-cycleway-' + stripcolon(d);
+	    }).html(function (d) {
+	      return field.t.html('types.' + d);
+	    });
+	    enter.append('div').attr('class', 'preset-input-cycleway-wrap').append('input').attr('type', 'text').attr('class', function (d) {
+	      return 'preset-input-cycleway preset-input-' + stripcolon(d);
+	    }).call(utilNoAuto).each(function (d) {
+	      select(this).call(uiCombobox(context, 'cycleway-' + stripcolon(d)).data(cycleway.options(d)));
+	    });
+	    items = items.merge(enter); // Update
+
+	    wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
 	  }
-	  return new Envelope(this._envelope)
-	};
-	Geometry.prototype.setSRID = function setSRID (SRID) {
-	  this._SRID = SRID;
-	};
-	Geometry.prototype.setUserData = function setUserData (userData) {
-	  this._userData = userData;
-	};
-	Geometry.prototype.compare = function compare (a, b) {
-	  var i = a.iterator();
-	  var j = b.iterator();
-	  while (i.hasNext() && j.hasNext()) {
-	    var aElement = i.next();
-	    var bElement = j.next();
-	    var comparison = aElement.compareTo(bElement);
-	    if (comparison !== 0) {
-	      return comparison
+
+	  function change(key) {
+	    var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
+
+	    if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;
+
+	    if (newValue === 'none' || newValue === '') {
+	      newValue = undefined;
 	    }
-	  }
-	  if (i.hasNext()) {
-	    return 1
-	  }
-	  if (j.hasNext()) {
-	    return -1
-	  }
-	  return 0
-	};
-	Geometry.prototype.hashCode = function hashCode () {
-	  return this.getEnvelopeInternal().hashCode()
-	};
-	Geometry.prototype.isGeometryCollectionOrDerived = function isGeometryCollectionOrDerived () {
-	  if (this.getSortIndex() === Geometry.SORTINDEX_GEOMETRYCOLLECTION || this.getSortIndex() === Geometry.SORTINDEX_MULTIPOINT || this.getSortIndex() === Geometry.SORTINDEX_MULTILINESTRING || this.getSortIndex() === Geometry.SORTINDEX_MULTIPOLYGON) {
-	    return true
-	  }
-	  return false
-	};
-	Geometry.prototype.interfaces_ = function interfaces_ () {
-	  return [Clonable, Comparable, Serializable]
-	};
-	Geometry.prototype.getClass = function getClass () {
-	  return Geometry
-	};
-	Geometry.hasNonEmptyElements = function hasNonEmptyElements (geometries) {
-	  for (var i = 0; i < geometries.length; i++) {
-	    if (!geometries[i].isEmpty()) {
-	      return true
+
+	    var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
+	    var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
+
+	    if (otherValue && Array.isArray(otherValue)) {
+	      // we must always have an explicit value for comparison
+	      otherValue = otherValue[0];
 	    }
-	  }
-	  return false
-	};
-	Geometry.hasNullElements = function hasNullElements (array) {
-	  for (var i = 0; i < array.length; i++) {
-	    if (array[i] === null) {
-	      return true
+
+	    if (otherValue === 'none' || otherValue === '') {
+	      otherValue = undefined;
 	    }
-	  }
-	  return false
-	};
-	staticAccessors$11.serialVersionUID.get = function () { return 8763622679187376702 };
-	staticAccessors$11.SORTINDEX_POINT.get = function () { return 0 };
-	staticAccessors$11.SORTINDEX_MULTIPOINT.get = function () { return 1 };
-	staticAccessors$11.SORTINDEX_LINESTRING.get = function () { return 2 };
-	staticAccessors$11.SORTINDEX_LINEARRING.get = function () { return 3 };
-	staticAccessors$11.SORTINDEX_MULTILINESTRING.get = function () { return 4 };
-	staticAccessors$11.SORTINDEX_POLYGON.get = function () { return 5 };
-	staticAccessors$11.SORTINDEX_MULTIPOLYGON.get = function () { return 6 };
-	staticAccessors$11.SORTINDEX_GEOMETRYCOLLECTION.get = function () { return 7 };
-	staticAccessors$11.geometryChangedFilter.get = function () { return geometryChangedFilter };
-
-	Object.defineProperties( Geometry, staticAccessors$11 );
-
-	var geometryChangedFilter = function geometryChangedFilter () {};
-
-	geometryChangedFilter.interfaces_ = function interfaces_ () {
-	  return [GeometryComponentFilter]
-	};
-	geometryChangedFilter.filter = function filter (geom) {
-	  geom.geometryChangedAction();
-	};
 
-	var CoordinateFilter = function CoordinateFilter () {};
+	    var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
+	    // sides the same way
 
-	CoordinateFilter.prototype.filter = function filter (coord) {};
-	CoordinateFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateFilter.prototype.getClass = function getClass () {
-	  return CoordinateFilter
-	};
+	    if (newValue === otherValue) {
+	      tag = {
+	        cycleway: newValue,
+	        'cycleway:left': undefined,
+	        'cycleway:right': undefined
+	      };
+	    } else {
+	      // Always set both left and right as changing one can affect the other
+	      tag = {
+	        cycleway: undefined
+	      };
+	      tag[key] = newValue;
+	      tag[otherKey] = otherValue;
+	    }
 
-	var BoundaryNodeRule = function BoundaryNodeRule () {};
+	    dispatch$1.call('change', this, tag);
+	  }
 
-	var staticAccessors$12 = { Mod2BoundaryNodeRule: { configurable: true },EndPointBoundaryNodeRule: { configurable: true },MultiValentEndPointBoundaryNodeRule: { configurable: true },MonoValentEndPointBoundaryNodeRule: { configurable: true },MOD2_BOUNDARY_RULE: { configurable: true },ENDPOINT_BOUNDARY_RULE: { configurable: true },MULTIVALENT_ENDPOINT_BOUNDARY_RULE: { configurable: true },MONOVALENT_ENDPOINT_BOUNDARY_RULE: { configurable: true },OGC_SFS_BOUNDARY_RULE: { configurable: true } };
+	  cycleway.options = function () {
+	    return Object.keys(field.strings.options).map(function (option) {
+	      return {
+	        title: field.t('options.' + option + '.description'),
+	        value: option
+	      };
+	    });
+	  };
 
-	BoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {};
-	BoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BoundaryNodeRule.prototype.getClass = function getClass () {
-	  return BoundaryNodeRule
-	};
-	staticAccessors$12.Mod2BoundaryNodeRule.get = function () { return Mod2BoundaryNodeRule };
-	staticAccessors$12.EndPointBoundaryNodeRule.get = function () { return EndPointBoundaryNodeRule };
-	staticAccessors$12.MultiValentEndPointBoundaryNodeRule.get = function () { return MultiValentEndPointBoundaryNodeRule };
-	staticAccessors$12.MonoValentEndPointBoundaryNodeRule.get = function () { return MonoValentEndPointBoundaryNodeRule };
-	staticAccessors$12.MOD2_BOUNDARY_RULE.get = function () { return new Mod2BoundaryNodeRule() };
-	staticAccessors$12.ENDPOINT_BOUNDARY_RULE.get = function () { return new EndPointBoundaryNodeRule() };
-	staticAccessors$12.MULTIVALENT_ENDPOINT_BOUNDARY_RULE.get = function () { return new MultiValentEndPointBoundaryNodeRule() };
-	staticAccessors$12.MONOVALENT_ENDPOINT_BOUNDARY_RULE.get = function () { return new MonoValentEndPointBoundaryNodeRule() };
-	staticAccessors$12.OGC_SFS_BOUNDARY_RULE.get = function () { return BoundaryNodeRule.MOD2_BOUNDARY_RULE };
-
-	Object.defineProperties( BoundaryNodeRule, staticAccessors$12 );
-
-	var Mod2BoundaryNodeRule = function Mod2BoundaryNodeRule () {};
-
-	Mod2BoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount % 2 === 1
-	};
-	Mod2BoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	Mod2BoundaryNodeRule.prototype.getClass = function getClass () {
-	  return Mod2BoundaryNodeRule
-	};
+	  cycleway.tags = function (tags) {
+	    _tags = tags; // If cycleway is set, use that instead of individual values
 
-	var EndPointBoundaryNodeRule = function EndPointBoundaryNodeRule () {};
+	    var commonValue = typeof tags.cycleway === 'string' && tags.cycleway;
+	    utilGetSetValue(items.selectAll('.preset-input-cycleway'), function (d) {
+	      if (commonValue) return commonValue;
+	      return !tags.cycleway && typeof tags[d] === 'string' ? tags[d] : '';
+	    }).attr('title', function (d) {
+	      if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+	        var vals = [];
 
-	EndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount > 0
-	};
-	EndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	EndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-	  return EndPointBoundaryNodeRule
-	};
+	        if (Array.isArray(tags.cycleway)) {
+	          vals = vals.concat(tags.cycleway);
+	        }
 
-	var MultiValentEndPointBoundaryNodeRule = function MultiValentEndPointBoundaryNodeRule () {};
+	        if (Array.isArray(tags[d])) {
+	          vals = vals.concat(tags[d]);
+	        }
 
-	MultiValentEndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount > 1
-	};
-	MultiValentEndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	MultiValentEndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-	  return MultiValentEndPointBoundaryNodeRule
-	};
+	        return vals.filter(Boolean).join('\n');
+	      }
 
-	var MonoValentEndPointBoundaryNodeRule = function MonoValentEndPointBoundaryNodeRule () {};
+	      return null;
+	    }).attr('placeholder', function (d) {
+	      if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+	        return _t('inspector.multiple_values');
+	      }
 
-	MonoValentEndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount === 1
-	};
-	MonoValentEndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	MonoValentEndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-	  return MonoValentEndPointBoundaryNodeRule
-	};
+	      return field.placeholder();
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
+	    });
+	  };
 
-	// import Iterator from './Iterator'
+	  cycleway.focus = function () {
+	    var node = wrap.selectAll('input').node();
+	    if (node) node.focus();
+	  };
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Collection.html
-	 *
-	 * @constructor
-	 * @private
-	 */
-	var Collection = function Collection () {};
+	  return utilRebind(cycleway, dispatch$1, 'on');
+	}
 
-	Collection.prototype.add = function add () {};
+	function uiFieldLanes(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var LANE_WIDTH = 40;
+	  var LANE_HEIGHT = 200;
+	  var _entityIDs = [];
 
-	/**
-	 * Appends all of the elements in the specified collection to the end of this
-	 * list, in the order that they are returned by the specified collection's
-	 * iterator (optional operation).
-	 * @param {javascript.util.Collection} c
-	 * @return {boolean}
-	 */
-	Collection.prototype.addAll = function addAll () {};
+	  function lanes(selection) {
+	    var lanesData = context.entity(_entityIDs[0]).lanes();
 
-	/**
-	 * Returns true if this collection contains no elements.
-	 * @return {boolean}
-	 */
-	Collection.prototype.isEmpty = function isEmpty () {};
+	    if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
+	      selection.call(lanes.off);
+	      return;
+	    }
 
-	/**
-	 * Returns an iterator over the elements in this collection.
-	 * @return {javascript.util.Iterator}
-	 */
-	Collection.prototype.iterator = function iterator () {};
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var surface = wrap.selectAll('.surface').data([0]);
+	    var d = utilGetDimensions(wrap);
+	    var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
+	    surface = surface.enter().append('svg').attr('width', d[0]).attr('height', 300).attr('class', 'surface').merge(surface);
+	    var lanesSelection = surface.selectAll('.lanes').data([0]);
+	    lanesSelection = lanesSelection.enter().append('g').attr('class', 'lanes').merge(lanesSelection);
+	    lanesSelection.attr('transform', function () {
+	      return 'translate(' + freeSpace / 2 + ', 0)';
+	    });
+	    var lane = lanesSelection.selectAll('.lane').data(lanesData.lanes);
+	    lane.exit().remove();
+	    var enter = lane.enter().append('g').attr('class', 'lane');
+	    enter.append('g').append('rect').attr('y', 50).attr('width', LANE_WIDTH).attr('height', LANE_HEIGHT);
+	    enter.append('g').attr('class', 'forward').append('text').attr('y', 40).attr('x', 14).html('▲');
+	    enter.append('g').attr('class', 'bothways').append('text').attr('y', 40).attr('x', 14).html('▲▼');
+	    enter.append('g').attr('class', 'backward').append('text').attr('y', 40).attr('x', 14).html('▼');
+	    lane = lane.merge(enter);
+	    lane.attr('transform', function (d) {
+	      return 'translate(' + LANE_WIDTH * d.index * 1.5 + ', 0)';
+	    });
+	    lane.select('.forward').style('visibility', function (d) {
+	      return d.direction === 'forward' ? 'visible' : 'hidden';
+	    });
+	    lane.select('.bothways').style('visibility', function (d) {
+	      return d.direction === 'bothways' ? 'visible' : 'hidden';
+	    });
+	    lane.select('.backward').style('visibility', function (d) {
+	      return d.direction === 'backward' ? 'visible' : 'hidden';
+	    });
+	  }
 
-	/**
-	 * Returns an iterator over the elements in this collection.
-	 * @return {number}
-	 */
-	Collection.prototype.size = function size () {};
+	  lanes.entityIDs = function (val) {
+	    _entityIDs = val;
+	  };
 
-	/**
-	 * Returns an array containing all of the elements in this collection.
-	 * @return {Array}
-	 */
-	Collection.prototype.toArray = function toArray () {};
+	  lanes.tags = function () {};
 
-	/**
-	 * Removes a single instance of the specified element from this collection if it
-	 * is present. (optional)
-	 * @param {Object} e
-	 * @return {boolean}
-	 */
-	Collection.prototype.remove = function remove () {};
+	  lanes.focus = function () {};
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function IndexOutOfBoundsException (message) {
-	  this.message = message || '';
+	  lanes.off = function () {};
+
+	  return utilRebind(lanes, dispatch$1, 'on');
 	}
-	IndexOutOfBoundsException.prototype = new Error();
+	uiFieldLanes.supportsMultiselection = false;
 
-	/**
-	 * @type {string}
-	 */
-	IndexOutOfBoundsException.prototype.name = 'IndexOutOfBoundsException';
+	var _languagesArray = [];
+	function uiFieldLocalized(field, context) {
+	  var dispatch$1 = dispatch('change', 'input');
+	  var wikipedia = services.wikipedia;
+	  var input = select(null);
+	  var localizedInputs = select(null);
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Iterator.html
-	 * @constructor
-	 * @private
-	 */
-	var Iterator$1 = function Iterator () {};
+	  var _countryCode;
 
-	Iterator$1.prototype.hasNext = function hasNext () {};
+	  var _tags; // A concern here in switching to async data means that _languagesArray will not
+	  // be available the first time through, so things like the fetchers and
+	  // the language() function will not work immediately.
 
-	/**
-	 * Returns the next element in the iteration.
-	 * @return {Object}
-	 */
-	Iterator$1.prototype.next = function next () {};
 
-	/**
-	 * Removes from the underlying collection the last element returned by the
-	 * iterator (optional operation).
-	 */
-	Iterator$1.prototype.remove = function remove () {};
+	  _mainFileFetcher.get('languages').then(loadLanguagesArray)["catch"](function () {
+	    /* ignore */
+	  });
+	  var _territoryLanguages = {};
+	  _mainFileFetcher.get('territory_languages').then(function (d) {
+	    _territoryLanguages = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  var allSuggestions = _mainPresetIndex.collection.filter(function (p) {
+	    return p.suggestion === true;
+	  }); // reuse these combos
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/List.html
-	 *
-	 * @extends {javascript.util.Collection}
-	 * @constructor
-	 * @private
-	 */
-	var List = (function (Collection$$1) {
-	  function List () {
-	    Collection$$1.apply(this, arguments);
-	  }
+	  var langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);
+	  var brandCombo = uiCombobox(context, 'localized-brand').canAutocomplete(false).minItems(1);
 
-	  if ( Collection$$1 ) { List.__proto__ = Collection$$1; }
-	  List.prototype = Object.create( Collection$$1 && Collection$$1.prototype );
-	  List.prototype.constructor = List;
+	  var _selection = select(null);
 
-	  List.prototype.get = function get () { };
+	  var _multilingual = [];
 
-	  /**
-	   * Replaces the element at the specified position in this list with the
-	   * specified element (optional operation).
-	   * @param {number} index
-	   * @param {Object} e
-	   * @return {Object}
-	   */
-	  List.prototype.set = function set () { };
+	  var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');
 
-	  /**
-	   * Returns true if this collection contains no elements.
-	   * @return {boolean}
-	   */
-	  List.prototype.isEmpty = function isEmpty () { };
+	  var _wikiTitles;
 
-	  return List;
-	}(Collection));
+	  var _entityIDs = [];
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function NoSuchElementException (message) {
-	  this.message = message || '';
-	}
-	NoSuchElementException.prototype = new Error();
+	  function loadLanguagesArray(dataLanguages) {
+	    if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used
 
-	/**
-	 * @type {string}
-	 */
-	NoSuchElementException.prototype.name = 'NoSuchElementException';
+	    var replacements = {
+	      sr: 'sr-Cyrl',
+	      // in OSM, `sr` implies Cyrillic
+	      'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM
 
-	// import OperationNotSupported from './OperationNotSupported'
+	    };
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/ArrayList.html
-	 *
-	 * @extends List
-	 * @private
-	 */
-	var ArrayList = (function (List$$1) {
-	  function ArrayList () {
-	    List$$1.call(this);
-	    this.array_ = [];
+	    for (var code in dataLanguages) {
+	      if (replacements[code] === false) continue;
+	      var metaCode = code;
+	      if (replacements[code]) metaCode = replacements[code];
 
-	    if (arguments[0] instanceof Collection) {
-	      this.addAll(arguments[0]);
+	      _languagesArray.push({
+	        localName: _mainLocalizer.languageName(metaCode, {
+	          localOnly: true
+	        }),
+	        nativeName: dataLanguages[metaCode].nativeName,
+	        code: code,
+	        label: _mainLocalizer.languageName(metaCode)
+	      });
 	    }
 	  }
 
-	  if ( List$$1 ) { ArrayList.__proto__ = List$$1; }
-	  ArrayList.prototype = Object.create( List$$1 && List$$1.prototype );
-	  ArrayList.prototype.constructor = ArrayList;
+	  function calcLocked() {
+	    // only lock the Name field
+	    var isLocked = field.id === 'name' && _entityIDs.length && // lock the field if any feature needs it
+	    _entityIDs.some(function (entityID) {
+	      var entity = context.graph().hasEntity(entityID);
+	      if (!entity) return false;
 
-	  ArrayList.prototype.ensureCapacity = function ensureCapacity () {};
-	  ArrayList.prototype.interfaces_ = function interfaces_ () { return [List$$1, Collection] };
+	      var original = context.graph().base().entities[_entityIDs[0]];
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.add = function add (e) {
-	    if (arguments.length === 1) {
-	      this.array_.push(e);
-	    } else {
-	      this.array_.splice(arguments[0], arguments[1]);
-	    }
-	    return true
-	  };
+	      var hasOriginalName = original && entity.tags.name && entity.tags.name === original.tags.name; // if the name was already edited manually then allow further editing
 
-	  ArrayList.prototype.clear = function clear () {
-	    this.array_ = [];
-	  };
+	      if (!hasOriginalName) return false; // features linked to Wikidata are likely important and should be protected
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.addAll = function addAll (c) {
-	    var this$1 = this;
+	      if (entity.tags.wikidata) return true; // assume the name has already been confirmed if its source has been researched
 
-	    for (var i = c.iterator(); i.hasNext();) {
-	      this$1.add(i.next());
-	    }
-	    return true
-	  };
+	      if (entity.tags['name:etymology:wikidata']) return true;
+	      var preset = _mainPresetIndex.match(entity, context.graph());
+	      var isSuggestion = preset && preset.suggestion;
+	      var showsBrand = preset && preset.originalFields.filter(function (d) {
+	        return d.id === 'brand';
+	      }).length; // protect standardized brand names
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.set = function set (index, element) {
-	    var oldElement = this.array_[index];
-	    this.array_[index] = element;
-	    return oldElement
-	  };
+	      return isSuggestion && !showsBrand;
+	    });
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.iterator = function iterator () {
-	    return new Iterator_(this)
-	  };
+	    field.locked(isLocked);
+	  } // update _multilingual, maintaining the existing order
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.get = function get (index) {
-	    if (index < 0 || index >= this.size()) {
-	      throw new IndexOutOfBoundsException()
-	    }
 
-	    return this.array_[index]
-	  };
+	  function calcMultilingual(tags) {
+	    var existingLangsOrdered = _multilingual.map(function (item) {
+	      return item.lang;
+	    });
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.isEmpty = function isEmpty () {
-	    return this.array_.length === 0
-	  };
+	    var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.size = function size () {
-	    return this.array_.length
-	  };
+	    for (var k in tags) {
+	      var m = k.match(/^(.*):([a-zA-Z_-]+)$/);
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.toArray = function toArray () {
-	    var this$1 = this;
+	      if (m && m[1] === field.key && m[2]) {
+	        var item = {
+	          lang: m[2],
+	          value: tags[k]
+	        };
 
-	    var array = [];
+	        if (existingLangs.has(item.lang)) {
+	          // update the value
+	          _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
+	          existingLangs["delete"](item.lang);
+	        } else {
+	          _multilingual.push(item);
+	        }
+	      }
+	    }
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      array.push(this$1.array_[i]);
+	    _multilingual = _multilingual.filter(function (item) {
+	      return !item.lang || !existingLangs.has(item.lang);
+	    });
+	  }
+
+	  function localized(selection) {
+	    _selection = selection;
+	    calcLocked();
+	    var isLocked = field.locked();
+	    var singularEntity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+	    var preset = singularEntity && _mainPresetIndex.match(singularEntity, context.graph());
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]); // enter/update
+
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    input = wrap.selectAll('.localized-main').data([0]); // enter/update
+
+	    input = input.enter().append('input').attr('type', 'text').attr('id', field.domId).attr('class', 'localized-main').call(utilNoAuto).merge(input);
+
+	    if (preset && field.id === 'name') {
+	      var pTag = preset.id.split('/', 2);
+	      var pKey = pTag[0];
+	      var pValue = pTag[1];
+
+	      if (!preset.suggestion) {
+	        // Not a suggestion preset - Add a suggestions dropdown if it makes sense to.
+	        // This code attempts to determine if the matched preset is the
+	        // kind of preset that even can benefit from name suggestions..
+	        // - true = shops, cafes, hotels, etc. (also generic and fallback presets)
+	        // - false = churches, parks, hospitals, etc. (things not in the index)
+	        var isFallback = preset.isFallback();
+	        var goodSuggestions = allSuggestions.filter(function (s) {
+	          if (isFallback) return true;
+	          var sTag = s.id.split('/', 2);
+	          var sKey = sTag[0];
+	          var sValue = sTag[1];
+	          return pKey === sKey && (!pValue || pValue === sValue);
+	        }); // Show the suggestions.. If the user picks one, change the tags..
+
+	        if (allSuggestions.length && goodSuggestions.length) {
+	          input.on('blur.localized', checkBrandOnBlur).call(brandCombo.fetcher(fetchBrandNames(preset, allSuggestions)).on('accept', acceptBrand).on('cancel', cancelBrand));
+	        }
+	      }
 	    }
 
-	    return array
-	  };
+	    input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
+	    var translateButton = wrap.selectAll('.localized-add').data([0]);
+	    translateButton = translateButton.enter().append('button').attr('class', 'localized-add form-field-button').call(svgIcon('#iD-icon-plus')).merge(translateButton);
+	    translateButton.classed('disabled', !!isLocked).call(isLocked ? _buttonTip.destroy : _buttonTip).on('click', addNew);
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.remove = function remove (o) {
-	    var this$1 = this;
+	    if (_tags && !_multilingual.length) {
+	      calcMultilingual(_tags);
+	    }
 
-	    var found = false;
+	    localizedInputs = selection.selectAll('.localized-multilingual').data([0]);
+	    localizedInputs = localizedInputs.enter().append('div').attr('class', 'localized-multilingual').merge(localizedInputs);
+	    localizedInputs.call(renderMultilingual);
+	    localizedInputs.selectAll('button, input').classed('disabled', !!isLocked).attr('readonly', isLocked || null); // We are not guaranteed to get an `accept` or `cancel` when blurring the field.
+	    // (This can happen if the user actives the combo, arrows down, and then clicks off to blur)
+	    // So compare the current field value against the suggestions one last time.
+
+	    function checkBrandOnBlur() {
+	      var latest = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+	      if (!latest) return; // deleting the entity blurred the field?
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      if (this$1.array_[i] === o) {
-	        this$1.array_.splice(i, 1);
-	        found = true;
-	        break
+	      var preset = _mainPresetIndex.match(latest, context.graph());
+	      if (preset && preset.suggestion) return; // already accepted
+
+	      var name = utilGetSetValue(input).trim();
+	      var matched = allSuggestions.filter(function (s) {
+	        return name === s.name();
+	      });
+
+	      if (matched.length === 1) {
+	        acceptBrand({
+	          suggestion: matched[0]
+	        });
+	      } else {
+	        cancelBrand();
 	      }
 	    }
 
-	    return found
-	  };
+	    function acceptBrand(d) {
+	      var entity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
 
-	  return ArrayList;
-	}(List));
+	      if (!d || !entity) {
+	        cancelBrand();
+	        return;
+	      }
 
-	/**
-	 * @extends {Iterator}
-	 * @param {ArrayList} arrayList
-	 * @constructor
-	 * @private
-	 */
-	var Iterator_ = (function (Iterator$$1) {
-	  function Iterator_ (arrayList) {
-	    Iterator$$1.call(this);
-	    /**
-	     * @type {ArrayList}
-	     * @private
-	    */
-	    this.arrayList_ = arrayList;
-	    /**
-	     * @type {number}
-	     * @private
-	    */
-	    this.position_ = 0;
-	  }
+	      var tags = entity.tags;
+	      var geometry = entity.geometry(context.graph());
+	      var removed = preset.unsetTags(tags, geometry);
 
-	  if ( Iterator$$1 ) { Iterator_.__proto__ = Iterator$$1; }
-	  Iterator_.prototype = Object.create( Iterator$$1 && Iterator$$1.prototype );
-	  Iterator_.prototype.constructor = Iterator_;
+	      for (var k in tags) {
+	        tags[k] = removed[k]; // set removed tags to `undefined`
+	      }
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.next = function next () {
-	    if (this.position_ === this.arrayList_.size()) {
-	      throw new NoSuchElementException()
-	    }
-	    return this.arrayList_.get(this.position_++)
-	  };
+	      tags = d.suggestion.setTags(tags, geometry);
+	      utilGetSetValue(input, tags.name);
+	      dispatch$1.call('change', this, tags);
+	    } // user hit escape
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.hasNext = function hasNext () {
-	    if (this.position_ < this.arrayList_.size()) {
-	      return true
-	    } else {
-	      return false
+
+	    function cancelBrand() {
+	      var name = utilGetSetValue(input);
+	      dispatch$1.call('change', this, {
+	        name: name
+	      });
 	    }
-	  };
 
-	  /**
-	   * TODO: should be in ListIterator
-	   * @override
-	   */
-	  Iterator_.prototype.set = function set (element) {
-	    return this.arrayList_.set(this.position_ - 1, element)
-	  };
+	    function fetchBrandNames(preset, suggestions) {
+	      var pTag = preset.id.split('/', 2);
+	      var pKey = pTag[0];
+	      var pValue = pTag[1];
+	      return function (value, callback) {
+	        var results = [];
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.remove = function remove () {
-	    this.arrayList_.remove(this.arrayList_.get(this.position_));
-	  };
-
-	  return Iterator_;
-	}(Iterator$1));
-
-	var CoordinateList = (function (ArrayList$$1) {
-	  function CoordinateList () {
-	    ArrayList$$1.call(this);
-	    if (arguments.length === 0) ; else if (arguments.length === 1) {
-	      var coord = arguments[0];
-	      this.ensureCapacity(coord.length);
-	      this.add(coord, true);
-	    } else if (arguments.length === 2) {
-	      var coord$1 = arguments[0];
-	      var allowRepeated = arguments[1];
-	      this.ensureCapacity(coord$1.length);
-	      this.add(coord$1, allowRepeated);
-	    }
-	  }
-
-	  if ( ArrayList$$1 ) { CoordinateList.__proto__ = ArrayList$$1; }
-	  CoordinateList.prototype = Object.create( ArrayList$$1 && ArrayList$$1.prototype );
-	  CoordinateList.prototype.constructor = CoordinateList;
-
-	  var staticAccessors = { coordArrayType: { configurable: true } };
-	  staticAccessors.coordArrayType.get = function () { return new Array(0).fill(null) };
-	  CoordinateList.prototype.getCoordinate = function getCoordinate (i) {
-	    return this.get(i)
-	  };
-	  CoordinateList.prototype.addAll = function addAll () {
-	    var this$1 = this;
-
-	    if (arguments.length === 2) {
-	      var coll = arguments[0];
-	      var allowRepeated = arguments[1];
-	      var isChanged = false;
-	      for (var i = coll.iterator(); i.hasNext();) {
-	        this$1.add(i.next(), allowRepeated);
-	        isChanged = true;
-	      }
-	      return isChanged
-	    } else { return ArrayList$$1.prototype.addAll.apply(this, arguments) }
-	  };
-	  CoordinateList.prototype.clone = function clone () {
-	    var this$1 = this;
-
-	    var clone = ArrayList$$1.prototype.clone.call(this);
-	    for (var i = 0; i < this.size(); i++) {
-	      clone.add(i, this$1.get(i).copy());
-	    }
-	    return clone
-	  };
-	  CoordinateList.prototype.toCoordinateArray = function toCoordinateArray () {
-	    return this.toArray(CoordinateList.coordArrayType)
-	  };
-	  CoordinateList.prototype.add = function add () {
-	    var this$1 = this;
-
-	    if (arguments.length === 1) {
-	      var coord = arguments[0];
-	      ArrayList$$1.prototype.add.call(this, coord);
-	    } else if (arguments.length === 2) {
-	      if (arguments[0] instanceof Array && typeof arguments[1] === 'boolean') {
-	        var coord$1 = arguments[0];
-	        var allowRepeated = arguments[1];
-	        this.add(coord$1, allowRepeated, true);
-	        return true
-	      } else if (arguments[0] instanceof Coordinate && typeof arguments[1] === 'boolean') {
-	        var coord$2 = arguments[0];
-	        var allowRepeated$1 = arguments[1];
-	        if (!allowRepeated$1) {
-	          if (this.size() >= 1) {
-	            var last = this.get(this.size() - 1);
-	            if (last.equals2D(coord$2)) { return null }
-	          }
-	        }
-	        ArrayList$$1.prototype.add.call(this, coord$2);
-	      } else if (arguments[0] instanceof Object && typeof arguments[1] === 'boolean') {
-	        var obj = arguments[0];
-	        var allowRepeated$2 = arguments[1];
-	        this.add(obj, allowRepeated$2);
-	        return true
-	      }
-	    } else if (arguments.length === 3) {
-	      if (typeof arguments[2] === 'boolean' && (arguments[0] instanceof Array && typeof arguments[1] === 'boolean')) {
-	        var coord$3 = arguments[0];
-	        var allowRepeated$3 = arguments[1];
-	        var direction = arguments[2];
-	        if (direction) {
-	          for (var i$1 = 0; i$1 < coord$3.length; i$1++) {
-	            this$1.add(coord$3[i$1], allowRepeated$3);
-	          }
-	        } else {
-	          for (var i$2 = coord$3.length - 1; i$2 >= 0; i$2--) {
-	            this$1.add(coord$3[i$2], allowRepeated$3);
-	          }
-	        }
-	        return true
-	      } else if (typeof arguments[2] === 'boolean' && (Number.isInteger(arguments[0]) && arguments[1] instanceof Coordinate)) {
-	        var i$3 = arguments[0];
-	        var coord$4 = arguments[1];
-	        var allowRepeated$4 = arguments[2];
-	        if (!allowRepeated$4) {
-	          var size = this.size();
-	          if (size > 0) {
-	            if (i$3 > 0) {
-	              var prev = this.get(i$3 - 1);
-	              if (prev.equals2D(coord$4)) { return null }
-	            }
-	            if (i$3 < size) {
-	              var next = this.get(i$3);
-	              if (next.equals2D(coord$4)) { return null }
+	        if (value && value.length > 2) {
+	          for (var i = 0; i < suggestions.length; i++) {
+	            var s = suggestions[i]; // don't suggest brands from incompatible countries
+
+	            if (_countryCode && s.countryCodes && s.countryCodes.indexOf(_countryCode) === -1) continue;
+	            var sTag = s.id.split('/', 2);
+	            var sKey = sTag[0];
+	            var sValue = sTag[1];
+	            var subtitle = s.subtitle();
+	            var name = s.name();
+	            if (subtitle) name += ' – ' + subtitle;
+	            var dist = utilEditDistance(value, name.substring(0, value.length));
+	            var matchesPreset = pKey === sKey && (!pValue || pValue === sValue);
+
+	            if (dist < 1 || matchesPreset && dist < 3) {
+	              var obj = {
+	                value: s.name(),
+	                title: name,
+	                display: s.nameLabel() + (subtitle ? ' – ' + s.subtitleLabel() : ''),
+	                suggestion: s,
+	                dist: dist + (matchesPreset ? 0 : 1) // penalize if not matched preset
+
+	              };
+	              results.push(obj);
 	            }
 	          }
+
+	          results.sort(function (a, b) {
+	            return a.dist - b.dist;
+	          });
 	        }
-	        ArrayList$$1.prototype.add.call(this, i$3, coord$4);
+
+	        results = results.slice(0, 10);
+	        callback(results);
+	      };
+	    }
+
+	    function addNew(d3_event) {
+	      d3_event.preventDefault();
+	      if (field.locked()) return;
+	      var defaultLang = _mainLocalizer.languageCode().toLowerCase();
+
+	      var langExists = _multilingual.find(function (datum) {
+	        return datum.lang === defaultLang;
+	      });
+
+	      var isLangEn = defaultLang.indexOf('en') > -1;
+
+	      if (isLangEn || langExists) {
+	        defaultLang = '';
+	        langExists = _multilingual.find(function (datum) {
+	          return datum.lang === defaultLang;
+	        });
 	      }
-	    } else if (arguments.length === 4) {
-	      var coord$5 = arguments[0];
-	      var allowRepeated$5 = arguments[1];
-	      var start = arguments[2];
-	      var end = arguments[3];
-	      var inc = 1;
-	      if (start > end) { inc = -1; }
-	      for (var i = start; i !== end; i += inc) {
-	        this$1.add(coord$5[i], allowRepeated$5);
+
+	      if (!langExists) {
+	        // prepend the value so it appears at the top
+	        _multilingual.unshift({
+	          lang: defaultLang,
+	          value: ''
+	        });
+
+	        localizedInputs.call(renderMultilingual);
 	      }
-	      return true
 	    }
-	  };
-	  CoordinateList.prototype.closeRing = function closeRing () {
-	    if (this.size() > 0) { this.add(new Coordinate(this.get(0)), false); }
-	  };
-	  CoordinateList.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  CoordinateList.prototype.getClass = function getClass () {
-	    return CoordinateList
-	  };
 
-	  Object.defineProperties( CoordinateList, staticAccessors );
+	    function change(onInput) {
+	      return function (d3_event) {
+	        if (field.locked()) {
+	          d3_event.preventDefault();
+	          return;
+	        }
 
-	  return CoordinateList;
-	}(ArrayList));
+	        var val = utilGetSetValue(select(this));
+	        if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-	var CoordinateArrays = function CoordinateArrays () {};
+	        if (!val && Array.isArray(_tags[field.key])) return;
+	        var t = {};
+	        t[field.key] = val || undefined;
+	        dispatch$1.call('change', this, t, onInput);
+	      };
+	    }
+	  }
 
-	var staticAccessors$13 = { ForwardComparator: { configurable: true },BidirectionalComparator: { configurable: true },coordArrayType: { configurable: true } };
+	  function key(lang) {
+	    return field.key + ':' + lang;
+	  }
 
-	staticAccessors$13.ForwardComparator.get = function () { return ForwardComparator };
-	staticAccessors$13.BidirectionalComparator.get = function () { return BidirectionalComparator };
-	staticAccessors$13.coordArrayType.get = function () { return new Array(0).fill(null) };
+	  function changeLang(d3_event, d) {
+	    var tags = {}; // make sure unrecognized suffixes are lowercase - #7156
 
-	CoordinateArrays.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateArrays.prototype.getClass = function getClass () {
-	  return CoordinateArrays
-	};
-	CoordinateArrays.isRing = function isRing (pts) {
-	  if (pts.length < 4) { return false }
-	  if (!pts[0].equals2D(pts[pts.length - 1])) { return false }
-	  return true
-	};
-	CoordinateArrays.ptNotInList = function ptNotInList (testPts, pts) {
-	  for (var i = 0; i < testPts.length; i++) {
-	    var testPt = testPts[i];
-	    if (CoordinateArrays.indexOf(testPt, pts) < 0) { return testPt }
-	  }
-	  return null
-	};
-	CoordinateArrays.scroll = function scroll (coordinates, firstCoordinate) {
-	  var i = CoordinateArrays.indexOf(firstCoordinate, coordinates);
-	  if (i < 0) { return null }
-	  var newCoordinates = new Array(coordinates.length).fill(null);
-	  System.arraycopy(coordinates, i, newCoordinates, 0, coordinates.length - i);
-	  System.arraycopy(coordinates, 0, newCoordinates, coordinates.length - i, i);
-	  System.arraycopy(newCoordinates, 0, coordinates, 0, coordinates.length);
-	};
-	CoordinateArrays.equals = function equals () {
-	  if (arguments.length === 2) {
-	    var coord1 = arguments[0];
-	    var coord2 = arguments[1];
-	    if (coord1 === coord2) { return true }
-	    if (coord1 === null || coord2 === null) { return false }
-	    if (coord1.length !== coord2.length) { return false }
-	    for (var i = 0; i < coord1.length; i++) {
-	      if (!coord1[i].equals(coord2[i])) { return false }
-	    }
-	    return true
-	  } else if (arguments.length === 3) {
-	    var coord1$1 = arguments[0];
-	    var coord2$1 = arguments[1];
-	    var coordinateComparator = arguments[2];
-	    if (coord1$1 === coord2$1) { return true }
-	    if (coord1$1 === null || coord2$1 === null) { return false }
-	    if (coord1$1.length !== coord2$1.length) { return false }
-	    for (var i$1 = 0; i$1 < coord1$1.length; i$1++) {
-	      if (coordinateComparator.compare(coord1$1[i$1], coord2$1[i$1]) !== 0) { return false }
-	    }
-	    return true
+	    var lang = utilGetSetValue(select(this)).toLowerCase();
+
+	    var language = _languagesArray.find(function (d) {
+	      return d.label.toLowerCase() === lang || d.localName && d.localName.toLowerCase() === lang || d.nativeName && d.nativeName.toLowerCase() === lang;
+	    });
+
+	    if (language) lang = language.code;
+
+	    if (d.lang && d.lang !== lang) {
+	      tags[key(d.lang)] = undefined;
+	    }
+
+	    var newKey = lang && context.cleanTagKey(key(lang));
+	    var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
+
+	    if (newKey && value) {
+	      tags[newKey] = value;
+	    } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
+	      tags[newKey] = _wikiTitles[d.lang];
+	    }
+
+	    d.lang = lang;
+	    dispatch$1.call('change', this, tags);
 	  }
-	};
-	CoordinateArrays.intersection = function intersection (coordinates, env) {
-	  var coordList = new CoordinateList();
-	  for (var i = 0; i < coordinates.length; i++) {
-	    if (env.intersects(coordinates[i])) { coordList.add(coordinates[i], true); }
+
+	  function changeValue(d3_event, d) {
+	    if (!d.lang) return;
+	    var value = context.cleanTagValue(utilGetSetValue(select(this))) || undefined; // don't override multiple values with blank string
+
+	    if (!value && Array.isArray(d.value)) return;
+	    var t = {};
+	    t[key(d.lang)] = value;
+	    d.value = value;
+	    dispatch$1.call('change', this, t);
 	  }
-	  return coordList.toCoordinateArray()
-	};
-	CoordinateArrays.hasRepeatedPoints = function hasRepeatedPoints (coord) {
-	  for (var i = 1; i < coord.length; i++) {
-	    if (coord[i - 1].equals(coord[i])) {
-	      return true
+
+	  function fetchLanguages(value, cb) {
+	    var v = value.toLowerCase(); // show the user's language first
+
+	    var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
+
+	    if (_countryCode && _territoryLanguages[_countryCode]) {
+	      langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
 	    }
+
+	    var langItems = [];
+	    langCodes.forEach(function (code) {
+	      var langItem = _languagesArray.find(function (item) {
+	        return item.code === code;
+	      });
+
+	      if (langItem) langItems.push(langItem);
+	    });
+	    langItems = utilArrayUniq(langItems.concat(_languagesArray));
+	    cb(langItems.filter(function (d) {
+	      return d.label.toLowerCase().indexOf(v) >= 0 || d.localName && d.localName.toLowerCase().indexOf(v) >= 0 || d.nativeName && d.nativeName.toLowerCase().indexOf(v) >= 0 || d.code.toLowerCase().indexOf(v) >= 0;
+	    }).map(function (d) {
+	      return {
+	        value: d.label
+	      };
+	    }));
 	  }
-	  return false
-	};
-	CoordinateArrays.removeRepeatedPoints = function removeRepeatedPoints (coord) {
-	  if (!CoordinateArrays.hasRepeatedPoints(coord)) { return coord }
-	  var coordList = new CoordinateList(coord, false);
-	  return coordList.toCoordinateArray()
-	};
-	CoordinateArrays.reverse = function reverse (coord) {
-	  var last = coord.length - 1;
-	  var mid = Math.trunc(last / 2);
-	  for (var i = 0; i <= mid; i++) {
-	    var tmp = coord[i];
-	    coord[i] = coord[last - i];
-	    coord[last - i] = tmp;
+
+	  function renderMultilingual(selection) {
+	    var entries = selection.selectAll('div.entry').data(_multilingual, function (d) {
+	      return d.lang;
+	    });
+	    entries.exit().style('top', '0').style('max-height', '240px').transition().duration(200).style('opacity', '0').style('max-height', '0px').remove();
+	    var entriesEnter = entries.enter().append('div').attr('class', 'entry').each(function (_, index) {
+	      var wrap = select(this);
+	      var domId = utilUniqueDomId(index);
+	      var label = wrap.append('label').attr('class', 'field-label').attr('for', domId);
+	      var text = label.append('span').attr('class', 'label-text');
+	      text.append('span').attr('class', 'label-textvalue').html(_t.html('translate.localized_translation_label'));
+	      text.append('span').attr('class', 'label-textannotation');
+	      label.append('button').attr('class', 'remove-icon-multilingual').on('click', function (d3_event, d) {
+	        if (field.locked()) return;
+	        d3_event.preventDefault();
+
+	        if (!d.lang || !d.value) {
+	          _multilingual.splice(index, 1);
+
+	          renderMultilingual(selection);
+	        } else {
+	          // remove from entity tags
+	          var t = {};
+	          t[key(d.lang)] = undefined;
+	          dispatch$1.call('change', this, t);
+	        }
+	      }).call(svgIcon('#iD-operation-delete'));
+	      wrap.append('input').attr('class', 'localized-lang').attr('id', domId).attr('type', 'text').attr('placeholder', _t('translate.localized_translation_language')).on('blur', changeLang).on('change', changeLang).call(langCombo);
+	      wrap.append('input').attr('type', 'text').attr('class', 'localized-value').on('blur', changeValue).on('change', changeValue);
+	    });
+	    entriesEnter.style('margin-top', '0px').style('max-height', '0px').style('opacity', '0').transition().duration(200).style('margin-top', '10px').style('max-height', '240px').style('opacity', '1').on('end', function () {
+	      select(this).style('max-height', '').style('overflow', 'visible');
+	    });
+	    entries = entries.merge(entriesEnter);
+	    entries.order();
+	    entries.classed('present', function (d) {
+	      return d.lang && d.value;
+	    });
+	    utilGetSetValue(entries.select('.localized-lang'), function (d) {
+	      return _mainLocalizer.languageName(d.lang);
+	    });
+	    utilGetSetValue(entries.select('.localized-value'), function (d) {
+	      return typeof d.value === 'string' ? d.value : '';
+	    }).attr('title', function (d) {
+	      return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : null;
+	    }).attr('placeholder', function (d) {
+	      return Array.isArray(d.value) ? _t('inspector.multiple_values') : _t('translate.localized_translation_name');
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(d.value);
+	    });
 	  }
-	};
-	CoordinateArrays.removeNull = function removeNull (coord) {
-	  var nonNull = 0;
-	  for (var i = 0; i < coord.length; i++) {
-	    if (coord[i] !== null) { nonNull++; }
-	  }
-	  var newCoord = new Array(nonNull).fill(null);
-	  if (nonNull === 0) { return newCoord }
-	  var j = 0;
-	  for (var i$1 = 0; i$1 < coord.length; i$1++) {
-	    if (coord[i$1] !== null) { newCoord[j++] = coord[i$1]; }
-	  }
-	  return newCoord
-	};
-	CoordinateArrays.copyDeep = function copyDeep () {
-	  if (arguments.length === 1) {
-	    var coordinates = arguments[0];
-	    var copy = new Array(coordinates.length).fill(null);
-	    for (var i = 0; i < coordinates.length; i++) {
-	      copy[i] = new Coordinate(coordinates[i]);
-	    }
-	    return copy
-	  } else if (arguments.length === 5) {
-	    var src = arguments[0];
-	    var srcStart = arguments[1];
-	    var dest = arguments[2];
-	    var destStart = arguments[3];
-	    var length = arguments[4];
-	    for (var i$1 = 0; i$1 < length; i$1++) {
-	      dest[destStart + i$1] = new Coordinate(src[srcStart + i$1]);
+
+	  localized.tags = function (tags) {
+	    _tags = tags; // Fetch translations from wikipedia
+
+	    if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
+	      _wikiTitles = {};
+	      var wm = tags.wikipedia.match(/([^:]+):(.+)/);
+
+	      if (wm && wm[0] && wm[1]) {
+	        wikipedia.translations(wm[1], wm[2], function (err, d) {
+	          if (err || !d) return;
+	          _wikiTitles = d;
+	        });
+	      }
 	    }
+
+	    var isMixed = Array.isArray(tags[field.key]);
+	    utilGetSetValue(input, typeof tags[field.key] === 'string' ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
+	    calcMultilingual(tags);
+
+	    _selection.call(localized);
+	  };
+
+	  localized.focus = function () {
+	    input.node().focus();
+	  };
+
+	  localized.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _multilingual = [];
+	    loadCountryCode();
+	    return localized;
+	  };
+
+	  function loadCountryCode() {
+	    var extent = combinedEntityExtent();
+	    var countryCode = extent && iso1A2Code(extent.center());
+	    _countryCode = countryCode && countryCode.toLowerCase();
 	  }
-	};
-	CoordinateArrays.isEqualReversed = function isEqualReversed (pts1, pts2) {
-	  for (var i = 0; i < pts1.length; i++) {
-	    var p1 = pts1[i];
-	    var p2 = pts2[pts1.length - i - 1];
-	    if (p1.compareTo(p2) !== 0) { return false }
-	  }
-	  return true
-	};
-	CoordinateArrays.envelope = function envelope (coordinates) {
-	  var env = new Envelope();
-	  for (var i = 0; i < coordinates.length; i++) {
-	    env.expandToInclude(coordinates[i]);
+
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
 	  }
-	  return env
-	};
-	CoordinateArrays.toCoordinateArray = function toCoordinateArray (coordList) {
-	  return coordList.toArray(CoordinateArrays.coordArrayType)
-	};
-	CoordinateArrays.atLeastNCoordinatesOrNothing = function atLeastNCoordinatesOrNothing (n, c) {
-	  return c.length >= n ? c : []
-	};
-	CoordinateArrays.indexOf = function indexOf (coordinate, coordinates) {
-	  for (var i = 0; i < coordinates.length; i++) {
-	    if (coordinate.equals(coordinates[i])) {
-	      return i
+
+	  return utilRebind(localized, dispatch$1, 'on');
+	}
+
+	function uiFieldMaxspeed(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var unitInput = select(null);
+	  var input = select(null);
+	  var _entityIDs = [];
+
+	  var _tags;
+
+	  var _isImperial;
+
+	  var speedCombo = uiCombobox(context, 'maxspeed');
+	  var unitCombo = uiCombobox(context, 'maxspeed-unit').data(['km/h', 'mph'].map(comboValues));
+	  var metricValues = [20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120];
+	  var imperialValues = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80];
+
+	  function maxspeed(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    input = wrap.selectAll('input.maxspeed-number').data([0]);
+	    input = input.enter().append('input').attr('type', 'text').attr('class', 'maxspeed-number').attr('id', field.domId).call(utilNoAuto).call(speedCombo).merge(input);
+	    input.on('change', change).on('blur', change);
+	    var loc = combinedEntityExtent().center();
+	    _isImperial = roadSpeedUnit(loc) === 'mph';
+	    unitInput = wrap.selectAll('input.maxspeed-unit').data([0]);
+	    unitInput = unitInput.enter().append('input').attr('type', 'text').attr('class', 'maxspeed-unit').call(unitCombo).merge(unitInput);
+	    unitInput.on('blur', changeUnits).on('change', changeUnits);
+
+	    function changeUnits() {
+	      _isImperial = utilGetSetValue(unitInput) === 'mph';
+	      utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+	      setUnitSuggestions();
+	      change();
 	    }
 	  }
-	  return -1
-	};
-	CoordinateArrays.increasingDirection = function increasingDirection (pts) {
-	  for (var i = 0; i < Math.trunc(pts.length / 2); i++) {
-	    var j = pts.length - 1 - i;
-	    var comp = pts[i].compareTo(pts[j]);
-	    if (comp !== 0) { return comp }
+
+	  function setUnitSuggestions() {
+	    speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
+	    utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
 	  }
-	  return 1
-	};
-	CoordinateArrays.compare = function compare (pts1, pts2) {
-	  var i = 0;
-	  while (i < pts1.length && i < pts2.length) {
-	    var compare = pts1[i].compareTo(pts2[i]);
-	    if (compare !== 0) { return compare }
-	    i++;
+
+	  function comboValues(d) {
+	    return {
+	      value: d.toString(),
+	      title: d.toString()
+	    };
 	  }
-	  if (i < pts2.length) { return -1 }
-	  if (i < pts1.length) { return 1 }
-	  return 0
-	};
-	CoordinateArrays.minCoordinate = function minCoordinate (coordinates) {
-	  var minCoord = null;
-	  for (var i = 0; i < coordinates.length; i++) {
-	    if (minCoord === null || minCoord.compareTo(coordinates[i]) > 0) {
-	      minCoord = coordinates[i];
+
+	  function change() {
+	    var tag = {};
+	    var value = utilGetSetValue(input).trim(); // don't override multiple values with blank string
+
+	    if (!value && Array.isArray(_tags[field.key])) return;
+
+	    if (!value) {
+	      tag[field.key] = undefined;
+	    } else if (isNaN(value) || !_isImperial) {
+	      tag[field.key] = context.cleanTagValue(value);
+	    } else {
+	      tag[field.key] = context.cleanTagValue(value + ' mph');
 	    }
+
+	    dispatch$1.call('change', this, tag);
 	  }
-	  return minCoord
-	};
-	CoordinateArrays.extract = function extract (pts, start, end) {
-	  start = MathUtil.clamp(start, 0, pts.length);
-	  end = MathUtil.clamp(end, -1, pts.length);
-	  var npts = end - start + 1;
-	  if (end < 0) { npts = 0; }
-	  if (start >= pts.length) { npts = 0; }
-	  if (end < start) { npts = 0; }
-	  var extractPts = new Array(npts).fill(null);
-	  if (npts === 0) { return extractPts }
-	  var iPts = 0;
-	  for (var i = start; i <= end; i++) {
-	    extractPts[iPts++] = pts[i];
-	  }
-	  return extractPts
-	};
 
-	Object.defineProperties( CoordinateArrays, staticAccessors$13 );
+	  maxspeed.tags = function (tags) {
+	    _tags = tags;
+	    var value = tags[field.key];
+	    var isMixed = Array.isArray(value);
+
+	    if (!isMixed) {
+	      if (value && value.indexOf('mph') >= 0) {
+	        value = parseInt(value, 10).toString();
+	        _isImperial = true;
+	      } else if (value) {
+	        _isImperial = false;
+	      }
+	    }
 
-	var ForwardComparator = function ForwardComparator () {};
+	    setUnitSuggestions();
+	    utilGetSetValue(input, typeof value === 'string' ? value : '').attr('title', isMixed ? value.filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
+	  };
 
-	ForwardComparator.prototype.compare = function compare (o1, o2) {
-	  var pts1 = o1;
-	  var pts2 = o2;
-	  return CoordinateArrays.compare(pts1, pts2)
-	};
-	ForwardComparator.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparator]
-	};
-	ForwardComparator.prototype.getClass = function getClass () {
-	  return ForwardComparator
-	};
+	  maxspeed.focus = function () {
+	    input.node().focus();
+	  };
+
+	  maxspeed.entityIDs = function (val) {
+	    _entityIDs = val;
+	  };
+
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
+
+	  return utilRebind(maxspeed, dispatch$1, 'on');
+	}
+
+	function uiFieldRadio(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var placeholder = select(null);
+	  var wrap = select(null);
+	  var labels = select(null);
+	  var radios = select(null);
+	  var radioData = (field.options || field.strings && field.strings.options && Object.keys(field.strings.options) || field.keys).slice(); // shallow copy
+
+	  var typeField;
+	  var layerField;
+	  var _oldType = {};
+	  var _entityIDs = [];
+
+	  function selectedKey() {
+	    var node = wrap.selectAll('.form-field-input-radio label.active input');
+	    return !node.empty() && node.datum();
+	  }
+
+	  function radio(selection) {
+	    selection.classed('preset-radio', true);
+	    wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    var enter = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-radio');
+	    enter.append('span').attr('class', 'placeholder');
+	    wrap = wrap.merge(enter);
+	    placeholder = wrap.selectAll('.placeholder');
+	    labels = wrap.selectAll('label').data(radioData);
+	    enter = labels.enter().append('label');
+	    enter.append('input').attr('type', 'radio').attr('name', field.id).attr('value', function (d) {
+	      return field.t('options.' + d, {
+	        'default': d
+	      });
+	    }).attr('checked', false);
+	    enter.append('span').html(function (d) {
+	      return field.t.html('options.' + d, {
+	        'default': d
+	      });
+	    });
+	    labels = labels.merge(enter);
+	    radios = labels.selectAll('input').on('change', changeRadio);
+	  }
+
+	  function structureExtras(selection, tags) {
+	    var selected = selectedKey() || tags.layer !== undefined;
+	    var type = _mainPresetIndex.field(selected);
+	    var layer = _mainPresetIndex.field('layer');
+	    var showLayer = selected === 'bridge' || selected === 'tunnel' || tags.layer !== undefined;
+	    var extrasWrap = selection.selectAll('.structure-extras-wrap').data(selected ? [0] : []);
+	    extrasWrap.exit().remove();
+	    extrasWrap = extrasWrap.enter().append('div').attr('class', 'structure-extras-wrap').merge(extrasWrap);
+	    var list = extrasWrap.selectAll('ul').data([0]);
+	    list = list.enter().append('ul').attr('class', 'rows').merge(list); // Type
+
+	    if (type) {
+	      if (!typeField || typeField.id !== selected) {
+	        typeField = uiField(context, type, _entityIDs, {
+	          wrap: false
+	        }).on('change', changeType);
+	      }
+
+	      typeField.tags(tags);
+	    } else {
+	      typeField = null;
+	    }
+
+	    var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
+	      return d.id;
+	    }); // Exit
+
+	    typeItem.exit().remove(); // Enter
+
+	    var typeEnter = typeItem.enter().insert('li', ':first-child').attr('class', 'labeled-input structure-type-item');
+	    typeEnter.append('span').attr('class', 'label structure-label-type').attr('for', 'preset-input-' + selected).html(_t.html('inspector.radio.structure.type'));
+	    typeEnter.append('div').attr('class', 'structure-input-type-wrap'); // Update
+
+	    typeItem = typeItem.merge(typeEnter);
+
+	    if (typeField) {
+	      typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
+	    } // Layer
+
+
+	    if (layer && showLayer) {
+	      if (!layerField) {
+	        layerField = uiField(context, layer, _entityIDs, {
+	          wrap: false
+	        }).on('change', changeLayer);
+	      }
+
+	      layerField.tags(tags);
+	      field.keys = utilArrayUnion(field.keys, ['layer']);
+	    } else {
+	      layerField = null;
+	      field.keys = field.keys.filter(function (k) {
+	        return k !== 'layer';
+	      });
+	    }
+
+	    var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit
+
+	    layerItem.exit().remove(); // Enter
+
+	    var layerEnter = layerItem.enter().append('li').attr('class', 'labeled-input structure-layer-item');
+	    layerEnter.append('span').attr('class', 'label structure-label-layer').attr('for', 'preset-input-layer').html(_t.html('inspector.radio.structure.layer'));
+	    layerEnter.append('div').attr('class', 'structure-input-layer-wrap'); // Update
 
-	var BidirectionalComparator = function BidirectionalComparator () {};
-
-	BidirectionalComparator.prototype.compare = function compare (o1, o2) {
-	  var pts1 = o1;
-	  var pts2 = o2;
-	  if (pts1.length < pts2.length) { return -1 }
-	  if (pts1.length > pts2.length) { return 1 }
-	  if (pts1.length === 0) { return 0 }
-	  var forwardComp = CoordinateArrays.compare(pts1, pts2);
-	  var isEqualRev = CoordinateArrays.isEqualReversed(pts1, pts2);
-	  if (isEqualRev) { return 0 }
-	  return forwardComp
-	};
-	BidirectionalComparator.prototype.OLDcompare = function OLDcompare (o1, o2) {
-	  var pts1 = o1;
-	  var pts2 = o2;
-	  if (pts1.length < pts2.length) { return -1 }
-	  if (pts1.length > pts2.length) { return 1 }
-	  if (pts1.length === 0) { return 0 }
-	  var dir1 = CoordinateArrays.increasingDirection(pts1);
-	  var dir2 = CoordinateArrays.increasingDirection(pts2);
-	  var i1 = dir1 > 0 ? 0 : pts1.length - 1;
-	  var i2 = dir2 > 0 ? 0 : pts1.length - 1;
-	  for (var i = 0; i < pts1.length; i++) {
-	    var comparePt = pts1[i1].compareTo(pts2[i2]);
-	    if (comparePt !== 0) { return comparePt }
-	    i1 += dir1;
-	    i2 += dir2;
-	  }
-	  return 0
-	};
-	BidirectionalComparator.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparator]
-	};
-	BidirectionalComparator.prototype.getClass = function getClass () {
-	  return BidirectionalComparator
-	};
+	    layerItem = layerItem.merge(layerEnter);
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Map.html
-	 *
-	 * @constructor
-	 * @private
-	 */
-	var Map$1$1 = function Map () {};
+	    if (layerField) {
+	      layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
+	    }
+	  }
 
-	Map$1$1.prototype.get = function get () {};
-	/**
-	 * Associates the specified value with the specified key in this map (optional
-	 * operation).
-	 * @param {Object} key
-	 * @param {Object} value
-	 * @return {Object}
-	 */
-	Map$1$1.prototype.put = function put () {};
+	  function changeType(t, onInput) {
+	    var key = selectedKey();
+	    if (!key) return;
+	    var val = t[key];
 
-	/**
-	 * Returns the number of key-value mappings in this map.
-	 * @return {number}
-	 */
-	Map$1$1.prototype.size = function size () {};
+	    if (val !== 'no') {
+	      _oldType[key] = val;
+	    }
 
-	/**
-	 * Returns a Collection view of the values contained in this map.
-	 * @return {javascript.util.Collection}
-	 */
-	Map$1$1.prototype.values = function values () {};
+	    if (field.type === 'structureRadio') {
+	      // remove layer if it should not be set
+	      if (val === 'no' || key !== 'bridge' && key !== 'tunnel' || key === 'tunnel' && val === 'building_passage') {
+	        t.layer = undefined;
+	      } // add layer if it should be set
 
-	/**
-	 * Returns a {@link Set} view of the mappings contained in this map.
-	 * The set is backed by the map, so changes to the map are
-	 * reflected in the set, and vice-versa.If the map is modified
-	 * while an iteration over the set is in progress (except through
-	 * the iterator's own <tt>remove</tt> operation, or through the
-	 * <tt>setValue</tt> operation on a map entry returned by the
-	 * iterator) the results of the iteration are undefined.The set
-	 * supports element removal, which removes the corresponding
-	 * mapping from the map, via the <tt>Iterator.remove</tt>,
-	 * <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt> and
-	 * <tt>clear</tt> operations.It does not support the
-	 * <tt>add</tt> or <tt>addAll</tt> operations.
-	 *
-	 * @return {Set} a set view of the mappings contained in this map
-	 */
-	Map$1$1.prototype.entrySet = function entrySet () {};
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/SortedMap.html
-	 *
-	 * @extends {Map}
-	 * @constructor
-	 * @private
-	 */
-	var SortedMap = (function (Map) {
-		function SortedMap () {
-			Map.apply(this, arguments);
-		}if ( Map ) { SortedMap.__proto__ = Map; }
-		SortedMap.prototype = Object.create( Map && Map.prototype );
-		SortedMap.prototype.constructor = SortedMap;
+	      if (t.layer === undefined) {
+	        if (key === 'bridge' && val !== 'no') {
+	          t.layer = '1';
+	        }
 
-		
+	        if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
+	          t.layer = '-1';
+	        }
+	      }
+	    }
 
-		return SortedMap;
-	}(Map$1$1));
+	    dispatch$1.call('change', this, t, onInput);
+	  }
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function OperationNotSupported (message) {
-	  this.message = message || '';
-	}
-	OperationNotSupported.prototype = new Error();
+	  function changeLayer(t, onInput) {
+	    if (t.layer === '0') {
+	      t.layer = undefined;
+	    }
 
-	/**
-	 * @type {string}
-	 */
-	OperationNotSupported.prototype.name = 'OperationNotSupported';
+	    dispatch$1.call('change', this, t, onInput);
+	  }
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Set.html
-	 *
-	 * @extends {Collection}
-	 * @constructor
-	 * @private
-	 */
-	function Set$2() {}
-	Set$2.prototype = new Collection();
+	  function changeRadio() {
+	    var t = {};
+	    var activeKey;
 
+	    if (field.key) {
+	      t[field.key] = undefined;
+	    }
 
-	/**
-	 * Returns true if this set contains the specified element. More formally,
-	 * returns true if and only if this set contains an element e such that (o==null ?
-	 * e==null : o.equals(e)).
-	 * @param {Object} e
-	 * @return {boolean}
-	 */
-	Set$2.prototype.contains = function() {};
+	    radios.each(function (d) {
+	      var active = select(this).property('checked');
+	      if (active) activeKey = d;
 
-	/**
-	 * @see http://docs.oracle.com/javase/6/docs/api/java/util/HashSet.html
-	 *
-	 * @extends {javascript.util.Set}
-	 * @constructor
-	 * @private
-	 */
-	var HashSet = (function (Set$$1) {
-	  function HashSet () {
-	    Set$$1.call(this);
-	    this.array_ = [];
+	      if (field.key) {
+	        if (active) t[field.key] = d;
+	      } else {
+	        var val = _oldType[activeKey] || 'yes';
+	        t[d] = active ? val : undefined;
+	      }
+	    });
 
-	    if (arguments[0] instanceof Collection) {
-	      this.addAll(arguments[0]);
+	    if (field.type === 'structureRadio') {
+	      if (activeKey === 'bridge') {
+	        t.layer = '1';
+	      } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
+	        t.layer = '-1';
+	      } else {
+	        t.layer = undefined;
+	      }
 	    }
+
+	    dispatch$1.call('change', this, t);
 	  }
 
-	  if ( Set$$1 ) { HashSet.__proto__ = Set$$1; }
-	  HashSet.prototype = Object.create( Set$$1 && Set$$1.prototype );
-	  HashSet.prototype.constructor = HashSet;
+	  radio.tags = function (tags) {
+	    radios.property('checked', function (d) {
+	      if (field.key) {
+	        return tags[field.key] === d;
+	      }
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.contains = function contains (o) {
-	    var this$1 = this;
+	      return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
+	    });
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      var e = this$1.array_[i];
-	      if (e === o) {
-	        return true
+	    function isMixed(d) {
+	      if (field.key) {
+	        return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
 	      }
-	    }
-	    return false
-	  };
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.add = function add (o) {
-	    if (this.contains(o)) {
-	      return false
+	      return Array.isArray(tags[d]);
 	    }
 
-	    this.array_.push(o);
+	    labels.classed('active', function (d) {
+	      if (field.key) {
+	        return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
+	      }
 
-	    return true
-	  };
+	      return Array.isArray(tags[d]) || !!(tags[d] && tags[d].toLowerCase() !== 'no');
+	    }).classed('mixed', isMixed).attr('title', function (d) {
+	      return isMixed(d) ? _t('inspector.unshared_value_tooltip') : null;
+	    });
+	    var selection = radios.filter(function () {
+	      return this.checked;
+	    });
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.addAll = function addAll (c) {
-	    var this$1 = this;
+	    if (selection.empty()) {
+	      placeholder.html(_t.html('inspector.none'));
+	    } else {
+	      placeholder.html(selection.attr('value'));
+	      _oldType[selection.datum()] = tags[selection.datum()];
+	    }
+
+	    if (field.type === 'structureRadio') {
+	      // For waterways without a tunnel tag, set 'culvert' as
+	      // the _oldType to default to if the user picks 'tunnel'
+	      if (!!tags.waterway && !_oldType.tunnel) {
+	        _oldType.tunnel = 'culvert';
+	      }
 
-	    for (var i = c.iterator(); i.hasNext();) {
-	      this$1.add(i.next());
+	      wrap.call(structureExtras, tags);
 	    }
-	    return true
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.remove = function remove (o) {
-	    // throw new javascript.util.OperationNotSupported()
-	    throw new Error()
+	  radio.focus = function () {
+	    radios.node().focus();
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.size = function size () {
-	    return this.array_.length
+	  radio.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _oldType = {};
+	    return radio;
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.isEmpty = function isEmpty () {
-	    return this.array_.length === 0
+	  radio.isAllowed = function () {
+	    return _entityIDs.length === 1;
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.toArray = function toArray () {
-	    var this$1 = this;
+	  return utilRebind(radio, dispatch$1, 'on');
+	}
 
-	    var array = [];
+	function uiFieldRestrictions(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var breathe = behaviorBreathe();
+	  corePreferences('turn-restriction-via-way', null); // remove old key
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      array.push(this$1.array_[i]);
-	    }
+	  var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922
 
-	    return array
-	  };
+	  var storedDistance = corePreferences('turn-restriction-distance');
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.iterator = function iterator () {
-	    return new Iterator_$1(this)
-	  };
+	  var _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;
 
-	  return HashSet;
-	}(Set$2));
+	  var _maxDistance = storedDistance ? +storedDistance : 30;
 
-	/**
-	   * @extends {Iterator}
-	   * @param {HashSet} hashSet
-	   * @constructor
-	   * @private
-	   */
-	var Iterator_$1 = (function (Iterator$$1) {
-	  function Iterator_ (hashSet) {
-	    Iterator$$1.call(this);
-	    /**
-	     * @type {HashSet}
-	     * @private
-	     */
-	    this.hashSet_ = hashSet;
-	    /**
-	     * @type {number}
-	     * @private
-	     */
-	    this.position_ = 0;
-	  }
+	  var _initialized = false;
 
-	  if ( Iterator$$1 ) { Iterator_.__proto__ = Iterator$$1; }
-	  Iterator_.prototype = Object.create( Iterator$$1 && Iterator$$1.prototype );
-	  Iterator_.prototype.constructor = Iterator_;
+	  var _parent = select(null); // the entire field
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.next = function next () {
-	    if (this.position_ === this.hashSet_.size()) {
-	      throw new NoSuchElementException()
-	    }
-	    return this.hashSet_.array_[this.position_++]
-	  };
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.hasNext = function hasNext () {
-	    if (this.position_ < this.hashSet_.size()) {
-	      return true
-	    } else {
-	      return false
-	    }
-	  };
+	  var _container = select(null); // just the map
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.remove = function remove () {
-	    throw new OperationNotSupported()
-	  };
 
-	  return Iterator_;
-	}(Iterator$1));
+	  var _oldTurns;
 
-	var BLACK = 0;
-	var RED = 1;
-	function colorOf (p) { return (p === null ? BLACK : p.color) }
-	function parentOf (p) { return (p === null ? null : p.parent) }
-	function setColor (p, c) { if (p !== null) { p.color = c; } }
-	function leftOf (p) { return (p === null ? null : p.left) }
-	function rightOf (p) { return (p === null ? null : p.right) }
+	  var _graph;
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/TreeMap.html
-	 *
-	 * @extends {SortedMap}
-	 * @constructor
-	 * @private
-	 */
-	function TreeMap () {
-	  /**
-	   * @type {Object}
-	   * @private
-	   */
-	  this.root_ = null;
-	  /**
-	   * @type {number}
-	   * @private
-	  */
-	  this.size_ = 0;
-	}
-	TreeMap.prototype = new SortedMap();
+	  var _vertexID;
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.get = function (key) {
-	  var p = this.root_;
-	  while (p !== null) {
-	    var cmp = key['compareTo'](p.key);
-	    if (cmp < 0) { p = p.left; }
-	    else if (cmp > 0) { p = p.right; }
-	    else { return p.value }
-	  }
-	  return null
-	};
+	  var _intersection;
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.put = function (key, value) {
-	  if (this.root_ === null) {
-	    this.root_ = {
-	      key: key,
-	      value: value,
-	      left: null,
-	      right: null,
-	      parent: null,
-	      color: BLACK,
-	      getValue: function getValue () { return this.value },
-	      getKey: function getKey () { return this.key }
-	    };
-	    this.size_ = 1;
-	    return null
-	  }
-	  var t = this.root_;
-	  var parent;
-	  var cmp;
-	  do {
-	    parent = t;
-	    cmp = key['compareTo'](t.key);
-	    if (cmp < 0) {
-	      t = t.left;
-	    } else if (cmp > 0) {
-	      t = t.right;
-	    } else {
-	      var oldValue = t.value;
-	      t.value = value;
-	      return oldValue
-	    }
-	  } while (t !== null)
-	  var e = {
-	    key: key,
-	    left: null,
-	    right: null,
-	    value: value,
-	    parent: parent,
-	    color: BLACK,
-	    getValue: function getValue () { return this.value },
-	    getKey: function getKey () { return this.key }
-	  };
-	  if (cmp < 0) {
-	    parent.left = e;
-	  } else {
-	    parent.right = e;
-	  }
-	  this.fixAfterInsertion(e);
-	  this.size_++;
-	  return null
-	};
+	  var _fromWayID;
 
-	/**
-	 * @param {Object} x
-	 */
-	TreeMap.prototype.fixAfterInsertion = function (x) {
-	  var this$1 = this;
-
-	  x.color = RED;
-	  while (x != null && x !== this.root_ && x.parent.color === RED) {
-	    if (parentOf(x) === leftOf(parentOf(parentOf(x)))) {
-	      var y = rightOf(parentOf(parentOf(x)));
-	      if (colorOf(y) === RED) {
-	        setColor(parentOf(x), BLACK);
-	        setColor(y, BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        x = parentOf(parentOf(x));
-	      } else {
-	        if (x === rightOf(parentOf(x))) {
-	          x = parentOf(x);
-	          this$1.rotateLeft(x);
-	        }
-	        setColor(parentOf(x), BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        this$1.rotateRight(parentOf(parentOf(x)));
-	      }
-	    } else {
-	      var y$1 = leftOf(parentOf(parentOf(x)));
-	      if (colorOf(y$1) === RED) {
-	        setColor(parentOf(x), BLACK);
-	        setColor(y$1, BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        x = parentOf(parentOf(x));
-	      } else {
-	        if (x === leftOf(parentOf(x))) {
-	          x = parentOf(x);
-	          this$1.rotateRight(x);
-	        }
-	        setColor(parentOf(x), BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        this$1.rotateLeft(parentOf(parentOf(x)));
-	      }
-	    }
-	  }
-	  this.root_.color = BLACK;
-	};
+	  var _lastXPos;
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.values = function () {
-	  var arrayList = new ArrayList();
-	  var p = this.getFirstEntry();
-	  if (p !== null) {
-	    arrayList.add(p.value);
-	    while ((p = TreeMap.successor(p)) !== null) {
-	      arrayList.add(p.value);
-	    }
-	  }
-	  return arrayList
-	};
+	  function restrictions(selection) {
+	    _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.entrySet = function () {
-	  var hashSet = new HashSet();
-	  var p = this.getFirstEntry();
-	  if (p !== null) {
-	    hashSet.add(p);
-	    while ((p = TreeMap.successor(p)) !== null) {
-	      hashSet.add(p);
-	    }
-	  }
-	  return hashSet
-	};
+	    if (_vertexID && (context.graph() !== _graph || !_intersection)) {
+	      _graph = context.graph();
+	      _intersection = osmIntersection(_graph, _vertexID, _maxDistance);
+	    } // It's possible for there to be no actual intersection here.
+	    // for example, a vertex of two `highway=path`
+	    // In this case, hide the field.
 
-	/**
-	 * @param {Object} p
-	 */
-	TreeMap.prototype.rotateLeft = function (p) {
-	  if (p != null) {
-	    var r = p.right;
-	    p.right = r.left;
-	    if (r.left != null) { r.left.parent = p; }
-	    r.parent = p.parent;
-	    if (p.parent === null) { this.root_ = r; } else if (p.parent.left === p) { p.parent.left = r; } else { p.parent.right = r; }
-	    r.left = p;
-	    p.parent = r;
-	  }
-	};
 
-	/**
-	 * @param {Object} p
-	 */
-	TreeMap.prototype.rotateRight = function (p) {
-	  if (p != null) {
-	    var l = p.left;
-	    p.left = l.right;
-	    if (l.right != null) { l.right.parent = p; }
-	    l.parent = p.parent;
-	    if (p.parent === null) { this.root_ = l; } else if (p.parent.right === p) { p.parent.right = l; } else { p.parent.left = l; }
-	    l.right = p;
-	    p.parent = l;
-	  }
-	};
+	    var isOK = _intersection && _intersection.vertices.length && // has vertices
+	    _intersection.vertices // has the vertex that the user selected
+	    .filter(function (vertex) {
+	      return vertex.id === _vertexID;
+	    }).length && _intersection.ways.length > 2 && // has more than 2 ways
+	    _intersection.ways // has more than 1 TO way
+	    .filter(function (way) {
+	      return way.__to;
+	    }).length > 1; // Also hide in the case where
 
-	/**
-	 * @return {Object}
-	 */
-	TreeMap.prototype.getFirstEntry = function () {
-	  var p = this.root_;
-	  if (p != null) {
-	    while (p.left != null) {
-	      p = p.left;
-	    }
-	  }
-	  return p
-	};
+	    select(selection.node().parentNode).classed('hide', !isOK); // if form field is hidden or has detached from dom, clean up.
 
-	/**
-	 * @param {Object} t
-	 * @return {Object}
-	 * @private
-	 */
-	TreeMap.successor = function (t) {
-	  if (t === null) { return null } else if (t.right !== null) {
-	    var p = t.right;
-	    while (p.left !== null) {
-	      p = p.left;
-	    }
-	    return p
-	  } else {
-	    var p$1 = t.parent;
-	    var ch = t;
-	    while (p$1 !== null && ch === p$1.right) {
-	      ch = p$1;
-	      p$1 = p$1.parent;
+	    if (!isOK || !context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode || !selection.node().parentNode.parentNode) {
+	      selection.call(restrictions.off);
+	      return;
 	    }
-	    return p$1
-	  }
-	};
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.size = function () {
-	  return this.size_
-	};
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var container = wrap.selectAll('.restriction-container').data([0]); // enter
 
-	var Lineal = function Lineal () {};
+	    var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
+	    containerEnter.append('div').attr('class', 'restriction-help'); // update
 
-	Lineal.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Lineal.prototype.getClass = function getClass () {
-	  return Lineal
-	};
+	    _container = containerEnter.merge(container).call(renderViewer);
+	    var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/SortedSet.html
-	 *
-	 * @extends {Set}
-	 * @constructor
-	 * @private
-	 */
-	function SortedSet () {}
-	SortedSet.prototype = new Set$2();
+	    controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
+	  }
 
-	// import Iterator from './Iterator'
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/TreeSet.html
-	 *
-	 * @extends {SortedSet}
-	 * @constructor
-	 * @private
-	 */
-	function TreeSet () {
-	  /**
-	   * @type {Array}
-	   * @private
-	  */
-	  this.array_ = [];
+	  function renderControls(selection) {
+	    var distControl = selection.selectAll('.restriction-distance').data([0]);
+	    distControl.exit().remove();
+	    var distControlEnter = distControl.enter().append('div').attr('class', 'restriction-control restriction-distance');
+	    distControlEnter.append('span').attr('class', 'restriction-control-label restriction-distance-label').html(_t.html('restriction.controls.distance') + ':');
+	    distControlEnter.append('input').attr('class', 'restriction-distance-input').attr('type', 'range').attr('min', '20').attr('max', '50').attr('step', '5');
+	    distControlEnter.append('span').attr('class', 'restriction-distance-text'); // update
 
-	  if (arguments[0] instanceof Collection) {
-	    this.addAll(arguments[0]);
-	  }
-	}
-	TreeSet.prototype = new SortedSet();
+	    selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
+	      var val = select(this).property('value');
+	      _maxDistance = +val;
+	      _intersection = null;
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.contains = function (o) {
-	  var this$1 = this;
+	      _container.selectAll('.layer-osm .layer-turns *').remove();
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    var e = this$1.array_[i];
-	    if (e['compareTo'](o) === 0) {
-	      return true
-	    }
-	  }
-	  return false
-	};
+	      corePreferences('turn-restriction-distance', _maxDistance);
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.add = function (o) {
-	  var this$1 = this;
+	      _parent.call(restrictions);
+	    });
+	    selection.selectAll('.restriction-distance-text').html(displayMaxDistance(_maxDistance));
+	    var viaControl = selection.selectAll('.restriction-via-way').data([0]);
+	    viaControl.exit().remove();
+	    var viaControlEnter = viaControl.enter().append('div').attr('class', 'restriction-control restriction-via-way');
+	    viaControlEnter.append('span').attr('class', 'restriction-control-label restriction-via-way-label').html(_t.html('restriction.controls.via') + ':');
+	    viaControlEnter.append('input').attr('class', 'restriction-via-way-input').attr('type', 'range').attr('min', '0').attr('max', '2').attr('step', '1');
+	    viaControlEnter.append('span').attr('class', 'restriction-via-way-text'); // update
 
-	  if (this.contains(o)) {
-	    return false
-	  }
+	    selection.selectAll('.restriction-via-way-input').property('value', _maxViaWay).on('input', function () {
+	      var val = select(this).property('value');
+	      _maxViaWay = +val;
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    var e = this$1.array_[i];
-	    if (e['compareTo'](o) === 1) {
-	      this$1.array_.splice(i, 0, o);
-	      return true
-	    }
-	  }
+	      _container.selectAll('.layer-osm .layer-turns *').remove();
 
-	  this.array_.push(o);
+	      corePreferences('turn-restriction-via-way0', _maxViaWay);
 
-	  return true
-	};
+	      _parent.call(restrictions);
+	    });
+	    selection.selectAll('.restriction-via-way-text').html(displayMaxVia(_maxViaWay));
+	  }
+
+	  function renderViewer(selection) {
+	    if (!_intersection) return;
+	    var vgraph = _intersection.graph;
+	    var filter = utilFunctor(true);
+	    var projection = geoRawMercator(); // Reflow warning: `utilGetDimensions` calls `getBoundingClientRect`
+	    // Instead of asking the restriction-container for its dimensions,
+	    //  we can ask the .sidebar, which can have its dimensions cached.
+	    // width: calc as sidebar - padding
+	    // height: hardcoded (from `80_app.css`)
+	    // var d = utilGetDimensions(selection);
+
+	    var sdims = utilGetDimensions(context.container().select('.sidebar'));
+	    var d = [sdims[0] - 50, 370];
+	    var c = geoVecScale(d, 0.5);
+	    var z = 22;
+	    projection.scale(geoZoomToScale(z)); // Calculate extent of all key vertices
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.addAll = function (c) {
-	  var this$1 = this;
+	    var extent = geoExtent();
 
-	  for (var i = c.iterator(); i.hasNext();) {
-	    this$1.add(i.next());
-	  }
-	  return true
-	};
+	    for (var i = 0; i < _intersection.vertices.length; i++) {
+	      extent._extend(_intersection.vertices[i].extent());
+	    } // If this is a large intersection, adjust zoom to fit extent
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.remove = function (e) {
-	  throw new OperationNotSupported()
-	};
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.size = function () {
-	  return this.array_.length
-	};
+	    if (_intersection.vertices.length > 1) {
+	      var padding = 180; // in z22 pixels
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.isEmpty = function () {
-	  return this.array_.length === 0
-	};
+	      var tl = projection([extent[0][0], extent[1][1]]);
+	      var br = projection([extent[1][0], extent[0][1]]);
+	      var hFactor = (br[0] - tl[0]) / (d[0] - padding);
+	      var vFactor = (br[1] - tl[1]) / (d[1] - padding);
+	      var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
+	      var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
+	      z = z - Math.max(hZoomDiff, vZoomDiff);
+	      projection.scale(geoZoomToScale(z));
+	    }
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.toArray = function () {
-	  var this$1 = this;
+	    var padTop = 35; // reserve top space for hint text
 
-	  var array = [];
+	    var extentCenter = projection(extent.center());
+	    extentCenter[1] = extentCenter[1] - padTop;
+	    projection.translate(geoVecSubtract(c, extentCenter)).clipExtent([[0, 0], d]);
+	    var drawLayers = svgLayers(projection, context).only(['osm', 'touch']).dimensions(d);
+	    var drawVertices = svgVertices(projection, context);
+	    var drawLines = svgLines(projection, context);
+	    var drawTurns = svgTurns(projection, context);
+	    var firstTime = selection.selectAll('.surface').empty();
+	    selection.call(drawLayers);
+	    var surface = selection.selectAll('.surface').classed('tr', true);
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    array.push(this$1.array_[i]);
-	  }
+	    if (firstTime) {
+	      _initialized = true;
+	      surface.call(breathe);
+	    } // This can happen if we've lowered the detail while a FROM way
+	    // is selected, and that way is no longer part of the intersection.
 
-	  return array
-	};
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.iterator = function () {
-	  return new Iterator_$2(this)
-	};
+	    if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
+	      _fromWayID = null;
+	      _oldTurns = null;
+	    }
 
-	/**
-	 * @extends {javascript.util.Iterator}
-	 * @param {javascript.util.TreeSet} treeSet
-	 * @constructor
-	 * @private
-	 */
-	var Iterator_$2 = function (treeSet) {
-	  /**
-	   * @type {javascript.util.TreeSet}
-	   * @private
-	   */
-	  this.treeSet_ = treeSet;
-	  /**
-	   * @type {number}
-	   * @private
-	   */
-	  this.position_ = 0;
-	};
+	    surface.call(utilSetDimensions, d).call(drawVertices, vgraph, _intersection.vertices, filter, extent, z).call(drawLines, vgraph, _intersection.ways, filter).call(drawTurns, vgraph, _intersection.turns(_fromWayID, _maxViaWay));
+	    surface.on('click.restrictions', click).on('mouseover.restrictions', mouseover);
+	    surface.selectAll('.selected').classed('selected', false);
+	    surface.selectAll('.related').classed('related', false);
+	    var way;
 
-	/**
-	 * @override
-	 */
-	Iterator_$2.prototype.next = function () {
-	  if (this.position_ === this.treeSet_.size()) {
-	    throw new NoSuchElementException()
-	  }
-	  return this.treeSet_.array_[this.position_++]
-	};
+	    if (_fromWayID) {
+	      way = vgraph.entity(_fromWayID);
+	      surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+	    }
 
-	/**
-	 * @override
-	 */
-	Iterator_$2.prototype.hasNext = function () {
-	  if (this.position_ < this.treeSet_.size()) {
-	    return true
-	  } else {
-	    return false
-	  }
-	};
+	    document.addEventListener('resizeWindow', function () {
+	      utilSetDimensions(_container, null);
+	      redraw(1);
+	    }, false);
+	    updateHints(null);
 
-	/**
-	 * @override
-	 */
-	Iterator_$2.prototype.remove = function () {
-	  throw new OperationNotSupported()
-	};
+	    function click(d3_event) {
+	      surface.call(breathe.off).call(breathe);
+	      var datum = d3_event.target.__data__;
+	      var entity = datum && datum.properties && datum.properties.entity;
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Arrays.html
-	 *
-	 * @constructor
-	 * @private
-	 */
-	var Arrays = function Arrays () {};
+	      if (entity) {
+	        datum = entity;
+	      }
 
-	Arrays.sort = function sort () {
-	  var a = arguments[0];
-	  var i;
-	  var t;
-	  var comparator;
-	  var compare;
-	  if (arguments.length === 1) {
-	    compare = function (a, b) {
-	      return a.compareTo(b)
-	    };
-	    a.sort(compare);
-	  } else if (arguments.length === 2) {
-	    comparator = arguments[1];
-	    compare = function (a, b) {
-	      return comparator['compare'](a, b)
-	    };
-	    a.sort(compare);
-	  } else if (arguments.length === 3) {
-	    t = a.slice(arguments[1], arguments[2]);
-	    t.sort();
-	    var r = a.slice(0, arguments[1]).concat(t, a.slice(arguments[2], a.length));
-	    a.splice(0, a.length);
-	    for (i = 0; i < r.length; i++) {
-	      a.push(r[i]);
-	    }
-	  } else if (arguments.length === 4) {
-	    t = a.slice(arguments[1], arguments[2]);
-	    comparator = arguments[3];
-	    compare = function (a, b) {
-	      return comparator['compare'](a, b)
-	    };
-	    t.sort(compare);
-	    r = a.slice(0, arguments[1]).concat(t, a.slice(arguments[2], a.length));
-	    a.splice(0, a.length);
-	    for (i = 0; i < r.length; i++) {
-	      a.push(r[i]);
-	    }
-	  }
-	};
-	/**
-	 * @param {Array} array
-	 * @return {ArrayList}
-	 */
-	Arrays.asList = function asList (array) {
-	  var arrayList = new ArrayList();
-	  for (var i = 0, len = array.length; i < len; i++) {
-	    arrayList.add(array[i]);
-	  }
-	  return arrayList
-	};
+	      if (datum instanceof osmWay && (datum.__from || datum.__via)) {
+	        _fromWayID = datum.id;
+	        _oldTurns = null;
+	        redraw();
+	      } else if (datum instanceof osmTurn) {
+	        var actions, extraActions, turns, i;
+	        var restrictionType = osmInferRestriction(vgraph, datum, projection);
 
-	var Dimension = function Dimension () {};
-
-	var staticAccessors$14 = { P: { configurable: true },L: { configurable: true },A: { configurable: true },FALSE: { configurable: true },TRUE: { configurable: true },DONTCARE: { configurable: true },SYM_FALSE: { configurable: true },SYM_TRUE: { configurable: true },SYM_DONTCARE: { configurable: true },SYM_P: { configurable: true },SYM_L: { configurable: true },SYM_A: { configurable: true } };
-
-	staticAccessors$14.P.get = function () { return 0 };
-	staticAccessors$14.L.get = function () { return 1 };
-	staticAccessors$14.A.get = function () { return 2 };
-	staticAccessors$14.FALSE.get = function () { return -1 };
-	staticAccessors$14.TRUE.get = function () { return -2 };
-	staticAccessors$14.DONTCARE.get = function () { return -3 };
-	staticAccessors$14.SYM_FALSE.get = function () { return 'F' };
-	staticAccessors$14.SYM_TRUE.get = function () { return 'T' };
-	staticAccessors$14.SYM_DONTCARE.get = function () { return '*' };
-	staticAccessors$14.SYM_P.get = function () { return '0' };
-	staticAccessors$14.SYM_L.get = function () { return '1' };
-	staticAccessors$14.SYM_A.get = function () { return '2' };
-
-	Dimension.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Dimension.prototype.getClass = function getClass () {
-	  return Dimension
-	};
-	Dimension.toDimensionSymbol = function toDimensionSymbol (dimensionValue) {
-	  switch (dimensionValue) {
-	    case Dimension.FALSE:
-	      return Dimension.SYM_FALSE
-	    case Dimension.TRUE:
-	      return Dimension.SYM_TRUE
-	    case Dimension.DONTCARE:
-	      return Dimension.SYM_DONTCARE
-	    case Dimension.P:
-	      return Dimension.SYM_P
-	    case Dimension.L:
-	      return Dimension.SYM_L
-	    case Dimension.A:
-	      return Dimension.SYM_A
-	  }
-	  throw new IllegalArgumentException('Unknown dimension value: ' + dimensionValue)
-	};
-	Dimension.toDimensionValue = function toDimensionValue (dimensionSymbol) {
-	  switch (Character.toUpperCase(dimensionSymbol)) {
-	    case Dimension.SYM_FALSE:
-	      return Dimension.FALSE
-	    case Dimension.SYM_TRUE:
-	      return Dimension.TRUE
-	    case Dimension.SYM_DONTCARE:
-	      return Dimension.DONTCARE
-	    case Dimension.SYM_P:
-	      return Dimension.P
-	    case Dimension.SYM_L:
-	      return Dimension.L
-	    case Dimension.SYM_A:
-	      return Dimension.A
-	  }
-	  throw new IllegalArgumentException('Unknown dimension symbol: ' + dimensionSymbol)
-	};
+	        if (datum.restrictionID && !datum.direct) {
+	          return;
+	        } else if (datum.restrictionID && !datum.only) {
+	          // NO -> ONLY
+	          var seen = {};
+	          var datumOnly = JSON.parse(JSON.stringify(datum)); // deep clone the datum
 
-	Object.defineProperties( Dimension, staticAccessors$14 );
+	          datumOnly.only = true; // but change this property
 
-	var GeometryFilter = function GeometryFilter () {};
+	          restrictionType = restrictionType.replace(/^no/, 'only'); // Adding an ONLY restriction should destroy all other direct restrictions from the FROM towards the VIA.
+	          // We will remember them in _oldTurns, and restore them if the user clicks again.
 
-	GeometryFilter.prototype.filter = function filter (geom) {};
-	GeometryFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryFilter.prototype.getClass = function getClass () {
-	  return GeometryFilter
-	};
+	          turns = _intersection.turns(_fromWayID, 2);
+	          extraActions = [];
+	          _oldTurns = [];
 
-	var CoordinateSequenceFilter = function CoordinateSequenceFilter () {};
+	          for (i = 0; i < turns.length; i++) {
+	            var turn = turns[i];
+	            if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)
 
-	CoordinateSequenceFilter.prototype.filter = function filter (seq, i) {};
-	CoordinateSequenceFilter.prototype.isDone = function isDone () {};
-	CoordinateSequenceFilter.prototype.isGeometryChanged = function isGeometryChanged () {};
-	CoordinateSequenceFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateSequenceFilter.prototype.getClass = function getClass () {
-	  return CoordinateSequenceFilter
-	};
+	            if (turn.direct && turn.path[1] === datum.path[1]) {
+	              seen[turns[i].restrictionID] = true;
+	              turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
 
-	var GeometryCollection = (function (Geometry$$1) {
-	  function GeometryCollection (geometries, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._geometries = geometries || [];
+	              _oldTurns.push(turn);
 
-	    if (Geometry$$1.hasNullElements(this._geometries)) {
-	      throw new IllegalArgumentException('geometries must not contain null elements')
-	    }
-	  }
+	              extraActions.push(actionUnrestrictTurn(turn));
+	            }
+	          }
 
-	  if ( Geometry$$1 ) { GeometryCollection.__proto__ = Geometry$$1; }
-	  GeometryCollection.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  GeometryCollection.prototype.constructor = GeometryCollection;
+	          actions = _intersection.actions.concat(extraActions, [actionRestrictTurn(datumOnly, restrictionType), _t('operations.restriction.annotation.create')]);
+	        } else if (datum.restrictionID) {
+	          // ONLY -> Allowed
+	          // Restore whatever restrictions we might have destroyed by cycling thru the ONLY state.
+	          // This relies on the assumption that the intersection was already split up when we
+	          // performed the previous action (NO -> ONLY), so the IDs in _oldTurns shouldn't have changed.
+	          turns = _oldTurns || [];
+	          extraActions = [];
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  GeometryCollection.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    var this$1 = this;
+	          for (i = 0; i < turns.length; i++) {
+	            if (turns[i].key !== datum.key) {
+	              extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
+	            }
+	          }
 
-	    var envelope = new Envelope();
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      envelope.expandToInclude(this$1._geometries[i].getEnvelopeInternal());
-	    }
-	    return envelope
-	  };
-	  GeometryCollection.prototype.getGeometryN = function getGeometryN (n) {
-	    return this._geometries[n]
-	  };
-	  GeometryCollection.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry$$1.SORTINDEX_GEOMETRYCOLLECTION
-	  };
-	  GeometryCollection.prototype.getCoordinates = function getCoordinates () {
-	    var this$1 = this;
+	          _oldTurns = null;
+	          actions = _intersection.actions.concat(extraActions, [actionUnrestrictTurn(datum), _t('operations.restriction.annotation.delete')]);
+	        } else {
+	          // Allowed -> NO
+	          actions = _intersection.actions.concat([actionRestrictTurn(datum, restrictionType), _t('operations.restriction.annotation.create')]);
+	        }
+
+	        context.perform.apply(context, actions); // At this point the datum will be changed, but will have same key..
+	        // Refresh it and update the help..
 
-	    var coordinates = new Array(this.getNumPoints()).fill(null);
-	    var k = -1;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      var childCoordinates = this$1._geometries[i].getCoordinates();
-	      for (var j = 0; j < childCoordinates.length; j++) {
-	        k++;
-	        coordinates[k] = childCoordinates[j];
+	        var s = surface.selectAll('.' + datum.key);
+	        datum = s.empty() ? null : s.datum();
+	        updateHints(datum);
+	      } else {
+	        _fromWayID = null;
+	        _oldTurns = null;
+	        redraw();
 	      }
 	    }
-	    return coordinates
-	  };
-	  GeometryCollection.prototype.getArea = function getArea () {
-	    var this$1 = this;
 
-	    var area = 0.0;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      area += this$1._geometries[i].getArea();
+	    function mouseover(d3_event) {
+	      var datum = d3_event.target.__data__;
+	      updateHints(datum);
 	    }
-	    return area
-	  };
-	  GeometryCollection.prototype.equalsExact = function equalsExact () {
-	    var this$1 = this;
 
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      var otherCollection = other;
-	      if (this._geometries.length !== otherCollection._geometries.length) {
-	        return false
-	      }
-	      for (var i = 0; i < this._geometries.length; i++) {
-	        if (!this$1._geometries[i].equalsExact(otherCollection._geometries[i], tolerance)) {
-	          return false
-	        }
+	    _lastXPos = _lastXPos || sdims[0];
+
+	    function redraw(minChange) {
+	      var xPos = -1;
+
+	      if (minChange) {
+	        xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
 	      }
-	      return true
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  GeometryCollection.prototype.normalize = function normalize () {
-	    var this$1 = this;
 
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      this$1._geometries[i].normalize();
-	    }
-	    Arrays.sort(this._geometries);
-	  };
-	  GeometryCollection.prototype.getCoordinate = function getCoordinate () {
-	    if (this.isEmpty()) { return null }
-	    return this._geometries[0].getCoordinate()
-	  };
-	  GeometryCollection.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    var this$1 = this;
+	      if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
+	        if (context.hasEntity(_vertexID)) {
+	          _lastXPos = xPos;
 
-	    var dimension = Dimension.FALSE;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      dimension = Math.max(dimension, this$1._geometries[i].getBoundaryDimension());
+	          _container.call(renderViewer);
+	        }
+	      }
 	    }
-	    return dimension
-	  };
-	  GeometryCollection.prototype.getDimension = function getDimension () {
-	    var this$1 = this;
 
-	    var dimension = Dimension.FALSE;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      dimension = Math.max(dimension, this$1._geometries[i].getDimension());
-	    }
-	    return dimension
-	  };
-	  GeometryCollection.prototype.getLength = function getLength () {
-	    var this$1 = this;
+	    function highlightPathsFrom(wayID) {
+	      surface.selectAll('.related').classed('related', false).classed('allow', false).classed('restrict', false).classed('only', false);
+	      surface.selectAll('.' + wayID).classed('related', true);
 
-	    var sum = 0.0;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      sum += this$1._geometries[i].getLength();
-	    }
-	    return sum
-	  };
-	  GeometryCollection.prototype.getNumPoints = function getNumPoints () {
-	    var this$1 = this;
+	      if (wayID) {
+	        var turns = _intersection.turns(wayID, _maxViaWay);
 
-	    var numPoints = 0;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      numPoints += this$1._geometries[i].getNumPoints();
-	    }
-	    return numPoints
-	  };
-	  GeometryCollection.prototype.getNumGeometries = function getNumGeometries () {
-	    return this._geometries.length
-	  };
-	  GeometryCollection.prototype.reverse = function reverse () {
-	    var this$1 = this;
+	        for (var i = 0; i < turns.length; i++) {
+	          var turn = turns[i];
+	          var ids = [turn.to.way];
+	          var klass = turn.no ? 'restrict' : turn.only ? 'only' : 'allow';
 
-	    var n = this._geometries.length;
-	    var revGeoms = new Array(n).fill(null);
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      revGeoms[i] = this$1._geometries[i].reverse();
-	    }
-	    return this.getFactory().createGeometryCollection(revGeoms)
-	  };
-	  GeometryCollection.prototype.compareToSameClass = function compareToSameClass () {
-	    var this$1 = this;
+	          if (turn.only || turns.length === 1) {
+	            if (turn.via.ways) {
+	              ids = ids.concat(turn.via.ways);
+	            }
+	          } else if (turn.to.way === wayID) {
+	            continue;
+	          }
 
-	    if (arguments.length === 1) {
-	      var o = arguments[0];
-	      var theseElements = new TreeSet(Arrays.asList(this._geometries));
-	      var otherElements = new TreeSet(Arrays.asList(o._geometries));
-	      return this.compare(theseElements, otherElements)
-	    } else if (arguments.length === 2) {
-	      var o$1 = arguments[0];
-	      var comp = arguments[1];
-	      var gc = o$1;
-	      var n1 = this.getNumGeometries();
-	      var n2 = gc.getNumGeometries();
-	      var i = 0;
-	      while (i < n1 && i < n2) {
-	        var thisGeom = this$1.getGeometryN(i);
-	        var otherGeom = gc.getGeometryN(i);
-	        var holeComp = thisGeom.compareToSameClass(otherGeom, comp);
-	        if (holeComp !== 0) { return holeComp }
-	        i++;
+	          surface.selectAll(utilEntitySelector(ids)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only');
+	        }
 	      }
-	      if (i < n1) { return 1 }
-	      if (i < n2) { return -1 }
-	      return 0
 	    }
-	  };
-	  GeometryCollection.prototype.apply = function apply () {
-	    var this$1 = this;
 
-	    if (hasInterface(arguments[0], CoordinateFilter)) {
-	      var filter = arguments[0];
-	      for (var i = 0; i < this._geometries.length; i++) {
-	        this$1._geometries[i].apply(filter);
+	    function updateHints(datum) {
+	      var help = _container.selectAll('.restriction-help').html('');
+
+	      var placeholders = {};
+	      ['from', 'via', 'to'].forEach(function (k) {
+	        placeholders[k] = '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>';
+	      });
+	      var entity = datum && datum.properties && datum.properties.entity;
+
+	      if (entity) {
+	        datum = entity;
 	      }
-	    } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
-	      var filter$1 = arguments[0];
-	      if (this._geometries.length === 0) { return null }
-	      for (var i$1 = 0; i$1 < this._geometries.length; i$1++) {
-	        this$1._geometries[i$1].apply(filter$1);
-	        if (filter$1.isDone()) {
-	          break
+
+	      if (_fromWayID) {
+	        way = vgraph.entity(_fromWayID);
+	        surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+	      } // Hovering a way
+
+
+	      if (datum instanceof osmWay && datum.__from) {
+	        way = datum;
+	        highlightPathsFrom(_fromWayID ? null : way.id);
+	        surface.selectAll('.' + way.id).classed('related', true);
+	        var clickSelect = !_fromWayID || _fromWayID !== way.id;
+	        help.append('div') // "Click to select FROM {fromName}." / "FROM {fromName}"
+	        .html(_t.html('restriction.help.' + (clickSelect ? 'select_from_name' : 'from_name'), {
+	          from: placeholders.from,
+	          fromName: displayName(way.id, vgraph)
+	        })); // Hovering a turn arrow
+	      } else if (datum instanceof osmTurn) {
+	        var restrictionType = osmInferRestriction(vgraph, datum, projection);
+	        var turnType = restrictionType.replace(/^(only|no)\_/, '');
+	        var indirect = datum.direct === false ? _t.html('restriction.help.indirect') : '';
+	        var klass, turnText, nextText;
+
+	        if (datum.no) {
+	          klass = 'restrict';
+	          turnText = _t.html('restriction.help.turn.no_' + turnType, {
+	            indirect: indirect
+	          });
+	          nextText = _t.html('restriction.help.turn.only_' + turnType, {
+	            indirect: ''
+	          });
+	        } else if (datum.only) {
+	          klass = 'only';
+	          turnText = _t.html('restriction.help.turn.only_' + turnType, {
+	            indirect: indirect
+	          });
+	          nextText = _t.html('restriction.help.turn.allowed_' + turnType, {
+	            indirect: ''
+	          });
+	        } else {
+	          klass = 'allow';
+	          turnText = _t.html('restriction.help.turn.allowed_' + turnType, {
+	            indirect: indirect
+	          });
+	          nextText = _t.html('restriction.help.turn.no_' + turnType, {
+	            indirect: ''
+	          });
 	        }
-	      }
-	      if (filter$1.isGeometryChanged()) { this.geometryChanged(); }
-	    } else if (hasInterface(arguments[0], GeometryFilter)) {
-	      var filter$2 = arguments[0];
-	      filter$2.filter(this);
-	      for (var i$2 = 0; i$2 < this._geometries.length; i$2++) {
-	        this$1._geometries[i$2].apply(filter$2);
-	      }
-	    } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
-	      var filter$3 = arguments[0];
-	      filter$3.filter(this);
-	      for (var i$3 = 0; i$3 < this._geometries.length; i$3++) {
-	        this$1._geometries[i$3].apply(filter$3);
-	      }
-	    }
-	  };
-	  GeometryCollection.prototype.getBoundary = function getBoundary () {
-	    this.checkNotGeometryCollection(this);
-	    Assert.shouldNeverReachHere();
-	    return null
-	  };
-	  GeometryCollection.prototype.clone = function clone () {
-	    var this$1 = this;
 
-	    var gc = Geometry$$1.prototype.clone.call(this);
-	    gc._geometries = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      gc._geometries[i] = this$1._geometries[i].clone();
-	    }
-	    return gc
-	  };
-	  GeometryCollection.prototype.getGeometryType = function getGeometryType () {
-	    return 'GeometryCollection'
-	  };
-	  GeometryCollection.prototype.copy = function copy () {
-	    var this$1 = this;
+	        help.append('div') // "NO Right Turn (indirect)"
+	        .attr('class', 'qualifier ' + klass).html(turnText);
+	        help.append('div') // "FROM {fromName} TO {toName}"
+	        .html(_t.html('restriction.help.from_name_to_name', {
+	          from: placeholders.from,
+	          fromName: displayName(datum.from.way, vgraph),
+	          to: placeholders.to,
+	          toName: displayName(datum.to.way, vgraph)
+	        }));
 
-	    var geometries = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < geometries.length; i++) {
-	      geometries[i] = this$1._geometries[i].copy();
-	    }
-	    return new GeometryCollection(geometries, this._factory)
-	  };
-	  GeometryCollection.prototype.isEmpty = function isEmpty () {
-	    var this$1 = this;
+	        if (datum.via.ways && datum.via.ways.length) {
+	          var names = [];
+
+	          for (var i = 0; i < datum.via.ways.length; i++) {
+	            var prev = names[names.length - 1];
+	            var curr = displayName(datum.via.ways[i], vgraph);
+	            if (!prev || curr !== prev) // collapse identical names
+	              names.push(curr);
+	          }
+
+	          help.append('div') // "VIA {viaNames}"
+	          .html(_t.html('restriction.help.via_names', {
+	            via: placeholders.via,
+	            viaNames: names.join(', ')
+	          }));
+	        }
+
+	        if (!indirect) {
+	          help.append('div') // Click for "No Right Turn"
+	          .html(_t.html('restriction.help.toggle', {
+	            turn: nextText.trim()
+	          }));
+	        }
+
+	        highlightPathsFrom(null);
+	        var alongIDs = datum.path.slice();
+	        surface.selectAll(utilEntitySelector(alongIDs)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only'); // Hovering empty surface
+	      } else {
+	        highlightPathsFrom(null);
 
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      if (!this$1._geometries[i].isEmpty()) {
-	        return false
+	        if (_fromWayID) {
+	          help.append('div') // "FROM {fromName}"
+	          .html(_t.html('restriction.help.from_name', {
+	            from: placeholders.from,
+	            fromName: displayName(_fromWayID, vgraph)
+	          }));
+	        } else {
+	          help.append('div') // "Click to select a FROM segment."
+	          .html(_t.html('restriction.help.select_from', {
+	            from: placeholders.from
+	          }));
+	        }
 	      }
 	    }
-	    return true
-	  };
-	  GeometryCollection.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  GeometryCollection.prototype.getClass = function getClass () {
-	    return GeometryCollection
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return -5694727726395021467 };
+	  }
 
-	  Object.defineProperties( GeometryCollection, staticAccessors );
+	  function displayMaxDistance(maxDist) {
+	    var isImperial = !_mainLocalizer.usesMetric();
+	    var opts;
 
-	  return GeometryCollection;
-	}(Geometry));
+	    if (isImperial) {
+	      var distToFeet = {
+	        // imprecise conversion for prettier display
+	        20: 70,
+	        25: 85,
+	        30: 100,
+	        35: 115,
+	        40: 130,
+	        45: 145,
+	        50: 160
+	      }[maxDist];
+	      opts = {
+	        distance: _t('units.feet', {
+	          quantity: distToFeet
+	        })
+	      };
+	    } else {
+	      opts = {
+	        distance: _t('units.meters', {
+	          quantity: maxDist
+	        })
+	      };
+	    }
 
-	var MultiLineString = (function (GeometryCollection$$1) {
-	  function MultiLineString () {
-	    GeometryCollection$$1.apply(this, arguments);
+	    return _t.html('restriction.controls.distance_up_to', opts);
 	  }
 
-	  if ( GeometryCollection$$1 ) { MultiLineString.__proto__ = GeometryCollection$$1; }
-	  MultiLineString.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-	  MultiLineString.prototype.constructor = MultiLineString;
+	  function displayMaxVia(maxVia) {
+	    return maxVia === 0 ? _t.html('restriction.controls.via_node_only') : maxVia === 1 ? _t.html('restriction.controls.via_up_to_one') : _t.html('restriction.controls.via_up_to_two');
+	  }
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
+	  function displayName(entityID, graph) {
+	    var entity = graph.entity(entityID);
+	    var name = utilDisplayName(entity) || '';
+	    var matched = _mainPresetIndex.match(entity, graph);
+	    var type = matched && matched.name() || utilDisplayType(entity.id);
+	    return name || type;
+	  }
 
-	  MultiLineString.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry.SORTINDEX_MULTILINESTRING
-	  };
-	  MultiLineString.prototype.equalsExact = function equalsExact () {
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      return GeometryCollection$$1.prototype.equalsExact.call(this, other, tolerance)
-	    } else { return GeometryCollection$$1.prototype.equalsExact.apply(this, arguments) }
+	  restrictions.entityIDs = function (val) {
+	    _intersection = null;
+	    _fromWayID = null;
+	    _oldTurns = null;
+	    _vertexID = val[0];
 	  };
-	  MultiLineString.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    if (this.isClosed()) {
-	      return Dimension.FALSE
-	    }
-	    return 0
-	  };
-	  MultiLineString.prototype.isClosed = function isClosed () {
-	    var this$1 = this;
 
-	    if (this.isEmpty()) {
-	      return false
-	    }
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      if (!this$1._geometries[i].isClosed()) {
-	        return false
-	      }
-	    }
-	    return true
-	  };
-	  MultiLineString.prototype.getDimension = function getDimension () {
-	    return 1
-	  };
-	  MultiLineString.prototype.reverse = function reverse () {
-	    var this$1 = this;
+	  restrictions.tags = function () {};
 
-	    var nLines = this._geometries.length;
-	    var revLines = new Array(nLines).fill(null);
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      revLines[nLines - 1 - i] = this$1._geometries[i].reverse();
-	    }
-	    return this.getFactory().createMultiLineString(revLines)
-	  };
-	  MultiLineString.prototype.getBoundary = function getBoundary () {
-	    return new BoundaryOp(this).getBoundary()
-	  };
-	  MultiLineString.prototype.getGeometryType = function getGeometryType () {
-	    return 'MultiLineString'
-	  };
-	  MultiLineString.prototype.copy = function copy () {
-	    var this$1 = this;
+	  restrictions.focus = function () {};
 
-	    var lineStrings = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < lineStrings.length; i++) {
-	      lineStrings[i] = this$1._geometries[i].copy();
-	    }
-	    return new MultiLineString(lineStrings, this._factory)
+	  restrictions.off = function (selection) {
+	    if (!_initialized) return;
+	    selection.selectAll('.surface').call(breathe.off).on('click.restrictions', null).on('mouseover.restrictions', null);
+	    select(window).on('resize.restrictions', null);
 	  };
-	  MultiLineString.prototype.interfaces_ = function interfaces_ () {
-	    return [Lineal]
-	  };
-	  MultiLineString.prototype.getClass = function getClass () {
-	    return MultiLineString
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return 8166665132445433741 };
 
-	  Object.defineProperties( MultiLineString, staticAccessors );
+	  return utilRebind(restrictions, dispatch$1, 'on');
+	}
+	uiFieldRestrictions.supportsMultiselection = false;
 
-	  return MultiLineString;
-	}(GeometryCollection));
+	function uiFieldTextarea(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var input = select(null);
 
-	var BoundaryOp = function BoundaryOp () {
-	  this._geom = null;
-	  this._geomFact = null;
-	  this._bnRule = null;
-	  this._endpointMap = null;
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    var bnRule = BoundaryNodeRule.MOD2_BOUNDARY_RULE;
-	    this._geom = geom;
-	    this._geomFact = geom.getFactory();
-	    this._bnRule = bnRule;
-	  } else if (arguments.length === 2) {
-	    var geom$1 = arguments[0];
-	    var bnRule$1 = arguments[1];
-	    this._geom = geom$1;
-	    this._geomFact = geom$1.getFactory();
-	    this._bnRule = bnRule$1;
-	  }
-	};
-	BoundaryOp.prototype.boundaryMultiLineString = function boundaryMultiLineString (mLine) {
-	  if (this._geom.isEmpty()) {
-	    return this.getEmptyMultiPoint()
-	  }
-	  var bdyPts = this.computeBoundaryCoordinates(mLine);
-	  if (bdyPts.length === 1) {
-	    return this._geomFact.createPoint(bdyPts[0])
-	  }
-	  return this._geomFact.createMultiPointFromCoords(bdyPts)
-	};
-	BoundaryOp.prototype.getBoundary = function getBoundary () {
-	  if (this._geom instanceof LineString) { return this.boundaryLineString(this._geom) }
-	  if (this._geom instanceof MultiLineString) { return this.boundaryMultiLineString(this._geom) }
-	  return this._geom.getBoundary()
-	};
-	BoundaryOp.prototype.boundaryLineString = function boundaryLineString (line) {
-	  if (this._geom.isEmpty()) {
-	    return this.getEmptyMultiPoint()
-	  }
-	  if (line.isClosed()) {
-	    var closedEndpointOnBoundary = this._bnRule.isInBoundary(2);
-	    if (closedEndpointOnBoundary) {
-	      return line.getStartPoint()
-	    } else {
-	      return this._geomFact.createMultiPoint()
-	    }
-	  }
-	  return this._geomFact.createMultiPoint([line.getStartPoint(), line.getEndPoint()])
-	};
-	BoundaryOp.prototype.getEmptyMultiPoint = function getEmptyMultiPoint () {
-	  return this._geomFact.createMultiPoint()
-	};
-	BoundaryOp.prototype.computeBoundaryCoordinates = function computeBoundaryCoordinates (mLine) {
-	    var this$1 = this;
-
-	  var bdyPts = new ArrayList();
-	  this._endpointMap = new TreeMap();
-	  for (var i = 0; i < mLine.getNumGeometries(); i++) {
-	    var line = mLine.getGeometryN(i);
-	    if (line.getNumPoints() === 0) { continue }
-	    this$1.addEndpoint(line.getCoordinateN(0));
-	    this$1.addEndpoint(line.getCoordinateN(line.getNumPoints() - 1));
-	  }
-	  for (var it = this._endpointMap.entrySet().iterator(); it.hasNext();) {
-	    var entry = it.next();
-	    var counter = entry.getValue();
-	    var valence = counter.count;
-	    if (this$1._bnRule.isInBoundary(valence)) {
-	      bdyPts.add(entry.getKey());
-	    }
-	  }
-	  return CoordinateArrays.toCoordinateArray(bdyPts)
-	};
-	BoundaryOp.prototype.addEndpoint = function addEndpoint (pt) {
-	  var counter = this._endpointMap.get(pt);
-	  if (counter === null) {
-	    counter = new Counter();
-	    this._endpointMap.put(pt, counter);
+	  var _tags;
+
+	  function textarea(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    input = wrap.selectAll('textarea').data([0]);
+	    input = input.enter().append('textarea').attr('id', field.domId).call(utilNoAuto).on('input', change(true)).on('blur', change()).on('change', change()).merge(input);
 	  }
-	  counter.count++;
-	};
-	BoundaryOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BoundaryOp.prototype.getClass = function getClass () {
-	  return BoundaryOp
-	};
-	BoundaryOp.getBoundary = function getBoundary () {
-	  if (arguments.length === 1) {
-	    var g = arguments[0];
-	    var bop = new BoundaryOp(g);
-	    return bop.getBoundary()
-	  } else if (arguments.length === 2) {
-	    var g$1 = arguments[0];
-	    var bnRule = arguments[1];
-	    var bop$1 = new BoundaryOp(g$1, bnRule);
-	    return bop$1.getBoundary()
+
+	  function change(onInput) {
+	    return function () {
+	      var val = utilGetSetValue(input);
+	      if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
+
+	      if (!val && Array.isArray(_tags[field.key])) return;
+	      var t = {};
+	      t[field.key] = val || undefined;
+	      dispatch$1.call('change', this, t, onInput);
+	    };
 	  }
-	};
 
-	var Counter = function Counter () {
-	  this.count = null;
-	};
-	Counter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Counter.prototype.getClass = function getClass () {
-	  return Counter
-	};
+	  textarea.tags = function (tags) {
+	    _tags = tags;
+	    var isMixed = Array.isArray(tags[field.key]);
+	    utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);
+	  };
 
-	// boundary
+	  textarea.focus = function () {
+	    input.node().focus();
+	  };
 
-	function PrintStream () {}
+	  return utilRebind(textarea, dispatch$1, 'on');
+	}
 
-	function StringReader () {}
+	function uiFieldWikidata(field, context) {
+	  var wikidata = services.wikidata;
+	  var dispatch$1 = dispatch('change');
 
-	var DecimalFormat = function DecimalFormat () {};
+	  var _selection = select(null);
 
-	function ByteArrayOutputStream () {}
+	  var _searchInput = select(null);
 
-	function IOException () {}
+	  var _qid = null;
+	  var _wikidataEntity = null;
+	  var _wikiURL = '';
+	  var _entityIDs = [];
 
-	function LineNumberReader () {}
+	  var _wikipediaKey = field.keys && field.keys.find(function (key) {
+	    return key.includes('wikipedia');
+	  }),
+	      _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
 
-	var StringUtil = function StringUtil () {};
+	  var combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(true).minItems(1);
 
-	var staticAccessors$15 = { NEWLINE: { configurable: true },SIMPLE_ORDINATE_FORMAT: { configurable: true } };
+	  function wiki(selection) {
+	    _selection = selection;
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+	    var list = wrap.selectAll('ul').data([0]);
+	    list = list.enter().append('ul').attr('class', 'rows').merge(list);
+	    var searchRow = list.selectAll('li.wikidata-search').data([0]);
+	    var searchRowEnter = searchRow.enter().append('li').attr('class', 'wikidata-search');
+	    searchRowEnter.append('input').attr('type', 'text').attr('id', field.domId).style('flex', '1').call(utilNoAuto).on('focus', function () {
+	      var node = select(this).node();
+	      node.setSelectionRange(0, node.value.length);
+	    }).on('blur', function () {
+	      setLabelForEntity();
+	    }).call(combobox.fetcher(fetchWikidataItems));
+	    combobox.on('accept', function (d) {
+	      if (d) {
+	        _qid = d.id;
+	        change();
+	      }
+	    }).on('cancel', function () {
+	      setLabelForEntity();
+	    });
+	    searchRowEnter.append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
+	      domain: 'wikidata.org'
+	    })).call(svgIcon('#iD-icon-out-link')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      if (_wikiURL) window.open(_wikiURL, '_blank');
+	    });
+	    searchRow = searchRow.merge(searchRowEnter);
+	    _searchInput = searchRow.select('input');
+	    var wikidataProperties = ['description', 'identifier'];
+	    var items = list.selectAll('li.labeled-input').data(wikidataProperties); // Enter
 
-	StringUtil.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	StringUtil.prototype.getClass = function getClass () {
-	  return StringUtil
-	};
-	StringUtil.chars = function chars (c, n) {
-	  var ch = new Array(n).fill(null);
-	  for (var i = 0; i < n; i++) {
-	    ch[i] = c;
+	    var enter = items.enter().append('li').attr('class', function (d) {
+	      return 'labeled-input preset-wikidata-' + d;
+	    });
+	    enter.append('span').attr('class', 'label').html(function (d) {
+	      return _t.html('wikidata.' + d);
+	    });
+	    enter.append('input').attr('type', 'text').call(utilNoAuto).classed('disabled', 'true').attr('readonly', 'true');
+	    enter.append('button').attr('class', 'form-field-button').attr('title', _t('icons.copy')).call(svgIcon('#iD-operation-copy')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      select(this.parentNode).select('input').node().select();
+	      document.execCommand('copy');
+	    });
 	  }
-	  return String(ch)
-	};
-	StringUtil.getStackTrace = function getStackTrace () {
-	  if (arguments.length === 1) {
-	    var t = arguments[0];
-	    var os = new ByteArrayOutputStream();
-	    var ps = new PrintStream(os);
-	    t.printStackTrace(ps);
-	    return os.toString()
-	  } else if (arguments.length === 2) {
-	    var t$1 = arguments[0];
-	    var depth = arguments[1];
-	    var stackTrace = '';
-	    var stringReader = new StringReader(StringUtil.getStackTrace(t$1));
-	    var lineNumberReader = new LineNumberReader(stringReader);
-	    for (var i = 0; i < depth; i++) {
-	      try {
-	        stackTrace += lineNumberReader.readLine() + StringUtil.NEWLINE;
-	      } catch (e) {
-	        if (e instanceof IOException) {
-	          Assert.shouldNeverReachHere();
-	        } else { throw e }
-	      } finally {}
+
+	  function fetchWikidataItems(q, callback) {
+	    if (!q && _hintKey) {
+	      // other tags may be good search terms
+	      for (var i in _entityIDs) {
+	        var entity = context.hasEntity(_entityIDs[i]);
+
+	        if (entity.tags[_hintKey]) {
+	          q = entity.tags[_hintKey];
+	          break;
+	        }
+	      }
 	    }
-	    return stackTrace
-	  }
-	};
-	StringUtil.split = function split (s, separator) {
-	  var separatorlen = separator.length;
-	  var tokenList = new ArrayList();
-	  var tmpString = '' + s;
-	  var pos = tmpString.indexOf(separator);
-	  while (pos >= 0) {
-	    var token = tmpString.substring(0, pos);
-	    tokenList.add(token);
-	    tmpString = tmpString.substring(pos + separatorlen);
-	    pos = tmpString.indexOf(separator);
-	  }
-	  if (tmpString.length > 0) { tokenList.add(tmpString); }
-	  var res = new Array(tokenList.size()).fill(null);
-	  for (var i = 0; i < res.length; i++) {
-	    res[i] = tokenList.get(i);
-	  }
-	  return res
-	};
-	StringUtil.toString = function toString () {
-	  if (arguments.length === 1) {
-	    var d = arguments[0];
-	    return StringUtil.SIMPLE_ORDINATE_FORMAT.format(d)
-	  }
-	};
-	StringUtil.spaces = function spaces (n) {
-	  return StringUtil.chars(' ', n)
-	};
-	staticAccessors$15.NEWLINE.get = function () { return System.getProperty('line.separator') };
-	staticAccessors$15.SIMPLE_ORDINATE_FORMAT.get = function () { return new DecimalFormat('0.#') };
 
-	Object.defineProperties( StringUtil, staticAccessors$15 );
+	    wikidata.itemsForSearchQuery(q, function (err, data) {
+	      if (err) return;
 
-	var CoordinateSequences = function CoordinateSequences () {};
+	      for (var i in data) {
+	        data[i].value = data[i].label + ' (' + data[i].id + ')';
+	        data[i].title = data[i].description;
+	      }
 
-	CoordinateSequences.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateSequences.prototype.getClass = function getClass () {
-	  return CoordinateSequences
-	};
-	CoordinateSequences.copyCoord = function copyCoord (src, srcPos, dest, destPos) {
-	  var minDim = Math.min(src.getDimension(), dest.getDimension());
-	  for (var dim = 0; dim < minDim; dim++) {
-	    dest.setOrdinate(destPos, dim, src.getOrdinate(srcPos, dim));
-	  }
-	};
-	CoordinateSequences.isRing = function isRing (seq) {
-	  var n = seq.size();
-	  if (n === 0) { return true }
-	  if (n <= 3) { return false }
-	  return seq.getOrdinate(0, CoordinateSequence.X) === seq.getOrdinate(n - 1, CoordinateSequence.X) && seq.getOrdinate(0, CoordinateSequence.Y) === seq.getOrdinate(n - 1, CoordinateSequence.Y)
-	};
-	CoordinateSequences.isEqual = function isEqual (cs1, cs2) {
-	  var cs1Size = cs1.size();
-	  var cs2Size = cs2.size();
-	  if (cs1Size !== cs2Size) { return false }
-	  var dim = Math.min(cs1.getDimension(), cs2.getDimension());
-	  for (var i = 0; i < cs1Size; i++) {
-	    for (var d = 0; d < dim; d++) {
-	      var v1 = cs1.getOrdinate(i, d);
-	      var v2 = cs2.getOrdinate(i, d);
-	      if (cs1.getOrdinate(i, d) === cs2.getOrdinate(i, d)) { continue }
-	      if (Double.isNaN(v1) && Double.isNaN(v2)) { continue }
-	      return false
-	    }
-	  }
-	  return true
-	};
-	CoordinateSequences.extend = function extend (fact, seq, size) {
-	  var newseq = fact.create(size, seq.getDimension());
-	  var n = seq.size();
-	  CoordinateSequences.copy(seq, 0, newseq, 0, n);
-	  if (n > 0) {
-	    for (var i = n; i < size; i++) { CoordinateSequences.copy(seq, n - 1, newseq, i, 1); }
-	  }
-	  return newseq
-	};
-	CoordinateSequences.reverse = function reverse (seq) {
-	  var last = seq.size() - 1;
-	  var mid = Math.trunc(last / 2);
-	  for (var i = 0; i <= mid; i++) {
-	    CoordinateSequences.swap(seq, i, last - i);
-	  }
-	};
-	CoordinateSequences.swap = function swap (seq, i, j) {
-	  if (i === j) { return null }
-	  for (var dim = 0; dim < seq.getDimension(); dim++) {
-	    var tmp = seq.getOrdinate(i, dim);
-	    seq.setOrdinate(i, dim, seq.getOrdinate(j, dim));
-	    seq.setOrdinate(j, dim, tmp);
-	  }
-	};
-	CoordinateSequences.copy = function copy (src, srcPos, dest, destPos, length) {
-	  for (var i = 0; i < length; i++) {
-	    CoordinateSequences.copyCoord(src, srcPos + i, dest, destPos + i);
-	  }
-	};
-	CoordinateSequences.toString = function toString () {
-	  if (arguments.length === 1) {
-	    var cs = arguments[0];
-	    var size = cs.size();
-	    if (size === 0) { return '()' }
-	    var dim = cs.getDimension();
-	    var buf = new StringBuffer();
-	    buf.append('(');
-	    for (var i = 0; i < size; i++) {
-	      if (i > 0) { buf.append(' '); }
-	      for (var d = 0; d < dim; d++) {
-	        if (d > 0) { buf.append(','); }
-	        buf.append(StringUtil.toString(cs.getOrdinate(i, d)));
-	      }
-	    }
-	    buf.append(')');
-	    return buf.toString()
+	      if (callback) callback(data);
+	    });
 	  }
-	};
-	CoordinateSequences.ensureValidRing = function ensureValidRing (fact, seq) {
-	  var n = seq.size();
-	  if (n === 0) { return seq }
-	  if (n <= 3) { return CoordinateSequences.createClosedRing(fact, seq, 4) }
-	  var isClosed = seq.getOrdinate(0, CoordinateSequence.X) === seq.getOrdinate(n - 1, CoordinateSequence.X) && seq.getOrdinate(0, CoordinateSequence.Y) === seq.getOrdinate(n - 1, CoordinateSequence.Y);
-	  if (isClosed) { return seq }
-	  return CoordinateSequences.createClosedRing(fact, seq, n + 1)
-	};
-	CoordinateSequences.createClosedRing = function createClosedRing (fact, seq, size) {
-	  var newseq = fact.create(size, seq.getDimension());
-	  var n = seq.size();
-	  CoordinateSequences.copy(seq, 0, newseq, 0, n);
-	  for (var i = n; i < size; i++) { CoordinateSequences.copy(seq, 0, newseq, i, 1); }
-	  return newseq
-	};
 
-	var LineString = (function (Geometry$$1) {
-	  function LineString (points, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._points = null;
-	    this.init(points);
-	  }
+	  function change() {
+	    var syncTags = {};
+	    syncTags[field.key] = _qid;
+	    dispatch$1.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..
 
-	  if ( Geometry$$1 ) { LineString.__proto__ = Geometry$$1; }
-	  LineString.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  LineString.prototype.constructor = LineString;
+	    var initGraph = context.graph();
+	    var initEntityIDs = _entityIDs;
+	    wikidata.entityByQID(_qid, function (err, entity) {
+	      if (err) return; // If graph has changed, we can't apply this update.
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  LineString.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    if (this.isEmpty()) {
-	      return new Envelope()
-	    }
-	    return this._points.expandEnvelope(new Envelope())
-	  };
-	  LineString.prototype.isRing = function isRing () {
-	    return this.isClosed() && this.isSimple()
-	  };
-	  LineString.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry$$1.SORTINDEX_LINESTRING
-	  };
-	  LineString.prototype.getCoordinates = function getCoordinates () {
-	    return this._points.toCoordinateArray()
-	  };
-	  LineString.prototype.equalsExact = function equalsExact () {
-	    var this$1 = this;
+	      if (context.graph() !== initGraph) return;
+	      if (!entity.sitelinks) return;
+	      var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks
+
+	      ['labels', 'descriptions'].forEach(function (key) {
+	        if (!entity[key]) return;
+	        var valueLangs = Object.keys(entity[key]);
+	        if (valueLangs.length === 0) return;
+	        var valueLang = valueLangs[0];
+
+	        if (langs.indexOf(valueLang) === -1) {
+	          langs.push(valueLang);
+	        }
+	      });
+	      var newWikipediaValue;
+
+	      if (_wikipediaKey) {
+	        var foundPreferred;
+
+	        for (var i in langs) {
+	          var lang = langs[i];
+	          var siteID = lang.replace('-', '_') + 'wiki';
+
+	          if (entity.sitelinks[siteID]) {
+	            foundPreferred = true;
+	            newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match
+
+	            break;
+	          }
+	        }
 
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      var otherLineString = other;
-	      if (this._points.size() !== otherLineString._points.size()) {
-	        return false
-	      }
-	      for (var i = 0; i < this._points.size(); i++) {
-	        if (!this$1.equal(this$1._points.getCoordinate(i), otherLineString._points.getCoordinate(i), tolerance)) {
-	          return false
+	        if (!foundPreferred) {
+	          // No wikipedia sites available in the user's language or the fallback languages,
+	          // default to any wikipedia sitelink
+	          var wikiSiteKeys = Object.keys(entity.sitelinks).filter(function (site) {
+	            return site.endsWith('wiki');
+	          });
+
+	          if (wikiSiteKeys.length === 0) {
+	            // if no wikipedia pages are linked to this wikidata entity, delete that tag
+	            newWikipediaValue = null;
+	          } else {
+	            var wikiLang = wikiSiteKeys[0].slice(0, -4).replace('_', '-');
+	            var wikiTitle = entity.sitelinks[wikiSiteKeys[0]].title;
+	            newWikipediaValue = wikiLang + ':' + wikiTitle;
+	          }
 	        }
 	      }
-	      return true
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  LineString.prototype.normalize = function normalize () {
-	    var this$1 = this;
 
-	    for (var i = 0; i < Math.trunc(this._points.size() / 2); i++) {
-	      var j = this$1._points.size() - 1 - i;
-	      if (!this$1._points.getCoordinate(i).equals(this$1._points.getCoordinate(j))) {
-	        if (this$1._points.getCoordinate(i).compareTo(this$1._points.getCoordinate(j)) > 0) {
-	          CoordinateSequences.reverse(this$1._points);
-	        }
-	        return null
+	      if (newWikipediaValue) {
+	        newWikipediaValue = context.cleanTagValue(newWikipediaValue);
 	      }
-	    }
-	  };
-	  LineString.prototype.getCoordinate = function getCoordinate () {
-	    if (this.isEmpty()) { return null }
-	    return this._points.getCoordinate(0)
-	  };
-	  LineString.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    if (this.isClosed()) {
-	      return Dimension.FALSE
-	    }
-	    return 0
-	  };
-	  LineString.prototype.isClosed = function isClosed () {
-	    if (this.isEmpty()) {
-	      return false
-	    }
-	    return this.getCoordinateN(0).equals2D(this.getCoordinateN(this.getNumPoints() - 1))
-	  };
-	  LineString.prototype.getEndPoint = function getEndPoint () {
-	    if (this.isEmpty()) {
-	      return null
-	    }
-	    return this.getPointN(this.getNumPoints() - 1)
-	  };
-	  LineString.prototype.getDimension = function getDimension () {
-	    return 1
-	  };
-	  LineString.prototype.getLength = function getLength () {
-	    return CGAlgorithms.computeLength(this._points)
-	  };
-	  LineString.prototype.getNumPoints = function getNumPoints () {
-	    return this._points.size()
-	  };
-	  LineString.prototype.reverse = function reverse () {
-	    var seq = this._points.copy();
-	    CoordinateSequences.reverse(seq);
-	    var revLine = this.getFactory().createLineString(seq);
-	    return revLine
-	  };
-	  LineString.prototype.compareToSameClass = function compareToSameClass () {
-	    var this$1 = this;
 
-	    if (arguments.length === 1) {
-	      var o = arguments[0];
-	      var line = o;
-	      var i = 0;
-	      var j = 0;
-	      while (i < this._points.size() && j < line._points.size()) {
-	        var comparison = this$1._points.getCoordinate(i).compareTo(line._points.getCoordinate(j));
-	        if (comparison !== 0) {
-	          return comparison
+	      if (typeof newWikipediaValue === 'undefined') return;
+	      var actions = initEntityIDs.map(function (entityID) {
+	        var entity = context.hasEntity(entityID);
+	        if (!entity) return null;
+	        var currTags = Object.assign({}, entity.tags); // shallow copy
+
+	        if (newWikipediaValue === null) {
+	          if (!currTags[_wikipediaKey]) return null;
+	          delete currTags[_wikipediaKey];
+	        } else {
+	          currTags[_wikipediaKey] = newWikipediaValue;
 	        }
-	        i++;
-	        j++;
-	      }
-	      if (i < this._points.size()) {
-	        return 1
-	      }
-	      if (j < line._points.size()) {
-	        return -1
-	      }
-	      return 0
-	    } else if (arguments.length === 2) {
-	      var o$1 = arguments[0];
-	      var comp = arguments[1];
-	      var line$1 = o$1;
-	      return comp.compare(this._points, line$1._points)
-	    }
-	  };
-	  LineString.prototype.apply = function apply () {
-	    var this$1 = this;
 
-	    if (hasInterface(arguments[0], CoordinateFilter)) {
-	      var filter = arguments[0];
-	      for (var i = 0; i < this._points.size(); i++) {
-	        filter.filter(this$1._points.getCoordinate(i));
-	      }
-	    } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
-	      var filter$1 = arguments[0];
-	      if (this._points.size() === 0) { return null }
-	      for (var i$1 = 0; i$1 < this._points.size(); i$1++) {
-	        filter$1.filter(this$1._points, i$1);
-	        if (filter$1.isDone()) { break }
-	      }
-	      if (filter$1.isGeometryChanged()) { this.geometryChanged(); }
-	    } else if (hasInterface(arguments[0], GeometryFilter)) {
-	      var filter$2 = arguments[0];
-	      filter$2.filter(this);
-	    } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
-	      var filter$3 = arguments[0];
-	      filter$3.filter(this);
-	    }
-	  };
-	  LineString.prototype.getBoundary = function getBoundary () {
-	    return new BoundaryOp(this).getBoundary()
-	  };
-	  LineString.prototype.isEquivalentClass = function isEquivalentClass (other) {
-	    return other instanceof LineString
-	  };
-	  LineString.prototype.clone = function clone () {
-	    var ls = Geometry$$1.prototype.clone.call(this);
-	    ls._points = this._points.clone();
-	    return ls
-	  };
-	  LineString.prototype.getCoordinateN = function getCoordinateN (n) {
-	    return this._points.getCoordinate(n)
-	  };
-	  LineString.prototype.getGeometryType = function getGeometryType () {
-	    return 'LineString'
-	  };
-	  LineString.prototype.copy = function copy () {
-	    return new LineString(this._points.copy(), this._factory)
-	  };
-	  LineString.prototype.getCoordinateSequence = function getCoordinateSequence () {
-	    return this._points
-	  };
-	  LineString.prototype.isEmpty = function isEmpty () {
-	    return this._points.size() === 0
-	  };
-	  LineString.prototype.init = function init (points) {
-	    if (points === null) {
-	      points = this.getFactory().getCoordinateSequenceFactory().create([]);
-	    }
-	    if (points.size() === 1) {
-	      throw new IllegalArgumentException('Invalid number of points in LineString (found ' + points.size() + ' - must be 0 or >= 2)')
-	    }
-	    this._points = points;
-	  };
-	  LineString.prototype.isCoordinate = function isCoordinate (pt) {
-	    var this$1 = this;
+	        return actionChangeTags(entityID, currTags);
+	      }).filter(Boolean);
+	      if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
+
+	      context.overwrite(function actionUpdateWikipediaTags(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
+	        });
+	        return graph;
+	      }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
+	      // changeTags() is not intended to be called asynchronously
+	    });
+	  }
+
+	  function setLabelForEntity() {
+	    var label = '';
 
-	    for (var i = 0; i < this._points.size(); i++) {
-	      if (this$1._points.getCoordinate(i).equals(pt)) {
-	        return true
+	    if (_wikidataEntity) {
+	      label = entityPropertyForDisplay(_wikidataEntity, 'labels');
+
+	      if (label.length === 0) {
+	        label = _wikidataEntity.id.toString();
 	      }
 	    }
-	    return false
-	  };
-	  LineString.prototype.getStartPoint = function getStartPoint () {
-	    if (this.isEmpty()) {
-	      return null
-	    }
-	    return this.getPointN(0)
-	  };
-	  LineString.prototype.getPointN = function getPointN (n) {
-	    return this.getFactory().createPoint(this._points.getCoordinate(n))
-	  };
-	  LineString.prototype.interfaces_ = function interfaces_ () {
-	    return [Lineal]
-	  };
-	  LineString.prototype.getClass = function getClass () {
-	    return LineString
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return 3110669828065365560 };
 
-	  Object.defineProperties( LineString, staticAccessors );
+	    utilGetSetValue(_searchInput, label);
+	  }
 
-	  return LineString;
-	}(Geometry));
+	  wiki.tags = function (tags) {
+	    var isMixed = Array.isArray(tags[field.key]);
 
-	var Puntal = function Puntal () {};
+	    _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);
 
-	Puntal.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Puntal.prototype.getClass = function getClass () {
-	  return Puntal
-	};
+	    _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
 
-	var Point$1 = (function (Geometry$$1) {
-	  function Point (coordinates, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._coordinates = coordinates || null;
-	    this.init(this._coordinates);
-	  }
+	    if (!/^Q[0-9]*$/.test(_qid)) {
+	      // not a proper QID
+	      unrecognized();
+	      return;
+	    } // QID value in correct format
 
-	  if ( Geometry$$1 ) { Point.__proto__ = Geometry$$1; }
-	  Point.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  Point.prototype.constructor = Point;
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  Point.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    if (this.isEmpty()) {
-	      return new Envelope()
-	    }
-	    var env = new Envelope();
-	    env.expandToInclude(this._coordinates.getX(0), this._coordinates.getY(0));
-	    return env
-	  };
-	  Point.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry$$1.SORTINDEX_POINT
-	  };
-	  Point.prototype.getCoordinates = function getCoordinates () {
-	    return this.isEmpty() ? [] : [this.getCoordinate()]
-	  };
-	  Point.prototype.equalsExact = function equalsExact () {
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      if (this.isEmpty() && other.isEmpty()) {
-	        return true
-	      }
-	      if (this.isEmpty() !== other.isEmpty()) {
-	        return false
-	      }
-	      return this.equal(other.getCoordinate(), this.getCoordinate(), tolerance)
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  Point.prototype.normalize = function normalize () {};
-	  Point.prototype.getCoordinate = function getCoordinate () {
-	    return this._coordinates.size() !== 0 ? this._coordinates.getCoordinate(0) : null
-	  };
-	  Point.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return Dimension.FALSE
-	  };
-	  Point.prototype.getDimension = function getDimension () {
-	    return 0
-	  };
-	  Point.prototype.getNumPoints = function getNumPoints () {
-	    return this.isEmpty() ? 0 : 1
-	  };
-	  Point.prototype.reverse = function reverse () {
-	    return this.copy()
-	  };
-	  Point.prototype.getX = function getX () {
-	    if (this.getCoordinate() === null) {
-	      throw new Error('getX called on empty Point')
-	    }
-	    return this.getCoordinate().x
-	  };
-	  Point.prototype.compareToSameClass = function compareToSameClass () {
-	    if (arguments.length === 1) {
-	      var other = arguments[0];
-	      var point$1 = other;
-	      return this.getCoordinate().compareTo(point$1.getCoordinate())
-	    } else if (arguments.length === 2) {
-	      var other$1 = arguments[0];
-	      var comp = arguments[1];
-	      var point = other$1;
-	      return comp.compare(this._coordinates, point._coordinates)
-	    }
-	  };
-	  Point.prototype.apply = function apply () {
-	    if (hasInterface(arguments[0], CoordinateFilter)) {
-	      var filter = arguments[0];
-	      if (this.isEmpty()) {
-	        return null
+	    _wikiURL = 'https://wikidata.org/wiki/' + _qid;
+	    wikidata.entityByQID(_qid, function (err, entity) {
+	      if (err) {
+	        unrecognized();
+	        return;
 	      }
-	      filter.filter(this.getCoordinate());
-	    } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
-	      var filter$1 = arguments[0];
-	      if (this.isEmpty()) { return null }
-	      filter$1.filter(this._coordinates, 0);
-	      if (filter$1.isGeometryChanged()) { this.geometryChanged(); }
-	    } else if (hasInterface(arguments[0], GeometryFilter)) {
-	      var filter$2 = arguments[0];
-	      filter$2.filter(this);
-	    } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
-	      var filter$3 = arguments[0];
-	      filter$3.filter(this);
-	    }
-	  };
-	  Point.prototype.getBoundary = function getBoundary () {
-	    return this.getFactory().createGeometryCollection(null)
-	  };
-	  Point.prototype.clone = function clone () {
-	    var p = Geometry$$1.prototype.clone.call(this);
-	    p._coordinates = this._coordinates.clone();
-	    return p
-	  };
-	  Point.prototype.getGeometryType = function getGeometryType () {
-	    return 'Point'
-	  };
-	  Point.prototype.copy = function copy () {
-	    return new Point(this._coordinates.copy(), this._factory)
-	  };
-	  Point.prototype.getCoordinateSequence = function getCoordinateSequence () {
-	    return this._coordinates
-	  };
-	  Point.prototype.getY = function getY () {
-	    if (this.getCoordinate() === null) {
-	      throw new Error('getY called on empty Point')
-	    }
-	    return this.getCoordinate().y
-	  };
-	  Point.prototype.isEmpty = function isEmpty () {
-	    return this._coordinates.size() === 0
-	  };
-	  Point.prototype.init = function init (coordinates) {
-	    if (coordinates === null) {
-	      coordinates = this.getFactory().getCoordinateSequenceFactory().create([]);
-	    }
-	    Assert.isTrue(coordinates.size() <= 1);
-	    this._coordinates = coordinates;
-	  };
-	  Point.prototype.isSimple = function isSimple () {
-	    return true
-	  };
-	  Point.prototype.interfaces_ = function interfaces_ () {
-	    return [Puntal]
-	  };
-	  Point.prototype.getClass = function getClass () {
-	    return Point
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return 4902022702746614570 };
 
-	  Object.defineProperties( Point, staticAccessors );
+	      _wikidataEntity = entity;
+	      setLabelForEntity();
+	      var description = entityPropertyForDisplay(entity, 'descriptions');
 
-	  return Point;
-	}(Geometry));
+	      _selection.select('button.wiki-link').classed('disabled', false);
 
-	var Polygonal = function Polygonal () {};
+	      _selection.select('.preset-wikidata-description').style('display', function () {
+	        return description.length > 0 ? 'flex' : 'none';
+	      }).select('input').attr('value', description);
 
-	Polygonal.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Polygonal.prototype.getClass = function getClass () {
-	  return Polygonal
-	};
+	      _selection.select('.preset-wikidata-identifier').style('display', function () {
+	        return entity.id ? 'flex' : 'none';
+	      }).select('input').attr('value', entity.id);
+	    }); // not a proper QID
 
-	var Polygon = (function (Geometry$$1) {
-	  function Polygon (shell, holes, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._shell = null;
-	    this._holes = null;
-	    if (shell === null) {
-	      shell = this.getFactory().createLinearRing();
-	    }
-	    if (holes === null) {
-	      holes = [];
-	    }
-	    if (Geometry$$1.hasNullElements(holes)) {
-	      throw new IllegalArgumentException('holes must not contain null elements')
-	    }
-	    if (shell.isEmpty() && Geometry$$1.hasNonEmptyElements(holes)) {
-	      throw new IllegalArgumentException('shell is empty but holes are not')
-	    }
-	    this._shell = shell;
-	    this._holes = holes;
-	  }
+	    function unrecognized() {
+	      _wikidataEntity = null;
+	      setLabelForEntity();
 
-	  if ( Geometry$$1 ) { Polygon.__proto__ = Geometry$$1; }
-	  Polygon.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  Polygon.prototype.constructor = Polygon;
+	      _selection.select('.preset-wikidata-description').style('display', 'none');
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  Polygon.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    return this._shell.getEnvelopeInternal()
-	  };
-	  Polygon.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry$$1.SORTINDEX_POLYGON
-	  };
-	  Polygon.prototype.getCoordinates = function getCoordinates () {
-	    var this$1 = this;
-
-	    if (this.isEmpty()) {
-	      return []
-	    }
-	    var coordinates = new Array(this.getNumPoints()).fill(null);
-	    var k = -1;
-	    var shellCoordinates = this._shell.getCoordinates();
-	    for (var x = 0; x < shellCoordinates.length; x++) {
-	      k++;
-	      coordinates[k] = shellCoordinates[x];
-	    }
-	    for (var i = 0; i < this._holes.length; i++) {
-	      var childCoordinates = this$1._holes[i].getCoordinates();
-	      for (var j = 0; j < childCoordinates.length; j++) {
-	        k++;
-	        coordinates[k] = childCoordinates[j];
+	      _selection.select('.preset-wikidata-identifier').style('display', 'none');
+
+	      _selection.select('button.wiki-link').classed('disabled', true);
+
+	      if (_qid && _qid !== '') {
+	        _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
+	      } else {
+	        _wikiURL = '';
 	      }
 	    }
-	    return coordinates
 	  };
-	  Polygon.prototype.getArea = function getArea () {
-	    var this$1 = this;
 
-	    var area = 0.0;
-	    area += Math.abs(CGAlgorithms.signedArea(this._shell.getCoordinateSequence()));
-	    for (var i = 0; i < this._holes.length; i++) {
-	      area -= Math.abs(CGAlgorithms.signedArea(this$1._holes[i].getCoordinateSequence()));
-	    }
-	    return area
-	  };
-	  Polygon.prototype.isRectangle = function isRectangle () {
-	    if (this.getNumInteriorRing() !== 0) { return false }
-	    if (this._shell === null) { return false }
-	    if (this._shell.getNumPoints() !== 5) { return false }
-	    var seq = this._shell.getCoordinateSequence();
-	    var env = this.getEnvelopeInternal();
-	    for (var i = 0; i < 5; i++) {
-	      var x = seq.getX(i);
-	      if (!(x === env.getMinX() || x === env.getMaxX())) { return false }
-	      var y = seq.getY(i);
-	      if (!(y === env.getMinY() || y === env.getMaxY())) { return false }
-	    }
-	    var prevX = seq.getX(0);
-	    var prevY = seq.getY(0);
-	    for (var i$1 = 1; i$1 <= 4; i$1++) {
-	      var x$1 = seq.getX(i$1);
-	      var y$1 = seq.getY(i$1);
-	      var xChanged = x$1 !== prevX;
-	      var yChanged = y$1 !== prevY;
-	      if (xChanged === yChanged) { return false }
-	      prevX = x$1;
-	      prevY = y$1;
-	    }
-	    return true
-	  };
-	  Polygon.prototype.equalsExact = function equalsExact () {
-	    var this$1 = this;
+	  function entityPropertyForDisplay(wikidataEntity, propKey) {
+	    if (!wikidataEntity[propKey]) return '';
+	    var propObj = wikidataEntity[propKey];
+	    var langKeys = Object.keys(propObj);
+	    if (langKeys.length === 0) return ''; // sorted by priority, since we want to show the user's language first if possible
 
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      var otherPolygon = other;
-	      var thisShell = this._shell;
-	      var otherPolygonShell = otherPolygon._shell;
-	      if (!thisShell.equalsExact(otherPolygonShell, tolerance)) {
-	        return false
-	      }
-	      if (this._holes.length !== otherPolygon._holes.length) {
-	        return false
-	      }
-	      for (var i = 0; i < this._holes.length; i++) {
-	        if (!this$1._holes[i].equalsExact(otherPolygon._holes[i], tolerance)) {
-	          return false
-	        }
-	      }
-	      return true
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  Polygon.prototype.normalize = function normalize () {
-	    var this$1 = this;
-
-	    if (arguments.length === 0) {
-	      this.normalize(this._shell, true);
-	      for (var i = 0; i < this._holes.length; i++) {
-	        this$1.normalize(this$1._holes[i], false);
-	      }
-	      Arrays.sort(this._holes);
-	    } else if (arguments.length === 2) {
-	      var ring = arguments[0];
-	      var clockwise = arguments[1];
-	      if (ring.isEmpty()) {
-	        return null
-	      }
-	      var uniqueCoordinates = new Array(ring.getCoordinates().length - 1).fill(null);
-	      System.arraycopy(ring.getCoordinates(), 0, uniqueCoordinates, 0, uniqueCoordinates.length);
-	      var minCoordinate = CoordinateArrays.minCoordinate(ring.getCoordinates());
-	      CoordinateArrays.scroll(uniqueCoordinates, minCoordinate);
-	      System.arraycopy(uniqueCoordinates, 0, ring.getCoordinates(), 0, uniqueCoordinates.length);
-	      ring.getCoordinates()[uniqueCoordinates.length] = uniqueCoordinates[0];
-	      if (CGAlgorithms.isCCW(ring.getCoordinates()) === clockwise) {
-	        CoordinateArrays.reverse(ring.getCoordinates());
-	      }
-	    }
-	  };
-	  Polygon.prototype.getCoordinate = function getCoordinate () {
-	    return this._shell.getCoordinate()
-	  };
-	  Polygon.prototype.getNumInteriorRing = function getNumInteriorRing () {
-	    return this._holes.length
-	  };
-	  Polygon.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return 1
-	  };
-	  Polygon.prototype.getDimension = function getDimension () {
-	    return 2
-	  };
-	  Polygon.prototype.getLength = function getLength () {
-	    var this$1 = this;
-
-	    var len = 0.0;
-	    len += this._shell.getLength();
-	    for (var i = 0; i < this._holes.length; i++) {
-	      len += this$1._holes[i].getLength();
-	    }
-	    return len
-	  };
-	  Polygon.prototype.getNumPoints = function getNumPoints () {
-	    var this$1 = this;
-
-	    var numPoints = this._shell.getNumPoints();
-	    for (var i = 0; i < this._holes.length; i++) {
-	      numPoints += this$1._holes[i].getNumPoints();
-	    }
-	    return numPoints
-	  };
-	  Polygon.prototype.reverse = function reverse () {
-	    var this$1 = this;
-
-	    var poly = this.copy();
-	    poly._shell = this._shell.copy().reverse();
-	    poly._holes = new Array(this._holes.length).fill(null);
-	    for (var i = 0; i < this._holes.length; i++) {
-	      poly._holes[i] = this$1._holes[i].copy().reverse();
-	    }
-	    return poly
-	  };
-	  Polygon.prototype.convexHull = function convexHull () {
-	    return this.getExteriorRing().convexHull()
+	    var langs = wikidata.languagesToQuery();
+
+	    for (var i in langs) {
+	      var lang = langs[i];
+	      var valueObj = propObj[lang];
+	      if (valueObj && valueObj.value && valueObj.value.length > 0) return valueObj.value;
+	    } // default to any available value
+
+
+	    return propObj[langKeys[0]].value;
+	  }
+
+	  wiki.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return wiki;
 	  };
-	  Polygon.prototype.compareToSameClass = function compareToSameClass () {
-	    var this$1 = this;
 
-	    if (arguments.length === 1) {
-	      var o = arguments[0];
-	      var thisShell = this._shell;
-	      var otherShell = o._shell;
-	      return thisShell.compareToSameClass(otherShell)
-	    } else if (arguments.length === 2) {
-	      var o$1 = arguments[0];
-	      var comp = arguments[1];
-	      var poly = o$1;
-	      var thisShell$1 = this._shell;
-	      var otherShell$1 = poly._shell;
-	      var shellComp = thisShell$1.compareToSameClass(otherShell$1, comp);
-	      if (shellComp !== 0) { return shellComp }
-	      var nHole1 = this.getNumInteriorRing();
-	      var nHole2 = poly.getNumInteriorRing();
-	      var i = 0;
-	      while (i < nHole1 && i < nHole2) {
-	        var thisHole = this$1.getInteriorRingN(i);
-	        var otherHole = poly.getInteriorRingN(i);
-	        var holeComp = thisHole.compareToSameClass(otherHole, comp);
-	        if (holeComp !== 0) { return holeComp }
-	        i++;
-	      }
-	      if (i < nHole1) { return 1 }
-	      if (i < nHole2) { return -1 }
-	      return 0
-	    }
+	  wiki.focus = function () {
+	    _searchInput.node().focus();
 	  };
-	  Polygon.prototype.apply = function apply (filter) {
-	    var this$1 = this;
 
-	    if (hasInterface(filter, CoordinateFilter)) {
-	      this._shell.apply(filter);
-	      for (var i$1 = 0; i$1 < this._holes.length; i$1++) {
-	        this$1._holes[i$1].apply(filter);
-	      }
-	    } else if (hasInterface(filter, CoordinateSequenceFilter)) {
-	      this._shell.apply(filter);
-	      if (!filter.isDone()) {
-	        for (var i$2 = 0; i$2 < this._holes.length; i$2++) {
-	          this$1._holes[i$2].apply(filter);
-	          if (filter.isDone()) { break }
+	  return utilRebind(wiki, dispatch$1, 'on');
+	}
+
+	function uiFieldWikipedia(field, context) {
+	  var _arguments = arguments;
+	  var dispatch$1 = dispatch('change');
+	  var wikipedia = services.wikipedia;
+	  var wikidata = services.wikidata;
+
+	  var _langInput = select(null);
+
+	  var _titleInput = select(null);
+
+	  var _wikiURL = '';
+
+	  var _entityIDs;
+
+	  var _tags;
+
+	  var _dataWikipedia = [];
+	  _mainFileFetcher.get('wmf_sitematrix').then(function (d) {
+	    _dataWikipedia = d;
+	    if (_tags) updateForTags(_tags);
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  var langCombo = uiCombobox(context, 'wikipedia-lang').fetcher(function (value, callback) {
+	    var v = value.toLowerCase();
+	    callback(_dataWikipedia.filter(function (d) {
+	      return d[0].toLowerCase().indexOf(v) >= 0 || d[1].toLowerCase().indexOf(v) >= 0 || d[2].toLowerCase().indexOf(v) >= 0;
+	    }).map(function (d) {
+	      return {
+	        value: d[1]
+	      };
+	    }));
+	  });
+	  var titleCombo = uiCombobox(context, 'wikipedia-title').fetcher(function (value, callback) {
+	    if (!value) {
+	      value = '';
+
+	      for (var i in _entityIDs) {
+	        var entity = context.hasEntity(_entityIDs[i]);
+
+	        if (entity.tags.name) {
+	          value = entity.tags.name;
+	          break;
 	        }
 	      }
-	      if (filter.isGeometryChanged()) { this.geometryChanged(); }
-	    } else if (hasInterface(filter, GeometryFilter)) {
-	      filter.filter(this);
-	    } else if (hasInterface(filter, GeometryComponentFilter)) {
-	      filter.filter(this);
-	      this._shell.apply(filter);
-	      for (var i = 0; i < this._holes.length; i++) {
-	        this$1._holes[i].apply(filter);
-	      }
 	    }
-	  };
-	  Polygon.prototype.getBoundary = function getBoundary () {
-	    var this$1 = this;
 
-	    if (this.isEmpty()) {
-	      return this.getFactory().createMultiLineString()
-	    }
-	    var rings = new Array(this._holes.length + 1).fill(null);
-	    rings[0] = this._shell;
-	    for (var i = 0; i < this._holes.length; i++) {
-	      rings[i + 1] = this$1._holes[i];
-	    }
-	    if (rings.length <= 1) { return this.getFactory().createLinearRing(rings[0].getCoordinateSequence()) }
-	    return this.getFactory().createMultiLineString(rings)
-	  };
-	  Polygon.prototype.clone = function clone () {
-	    var this$1 = this;
+	    var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
+	    searchfn(language()[2], value, function (query, data) {
+	      callback(data.map(function (d) {
+	        return {
+	          value: d
+	        };
+	      }));
+	    });
+	  });
 
-	    var poly = Geometry$$1.prototype.clone.call(this);
-	    poly._shell = this._shell.clone();
-	    poly._holes = new Array(this._holes.length).fill(null);
-	    for (var i = 0; i < this._holes.length; i++) {
-	      poly._holes[i] = this$1._holes[i].clone();
-	    }
-	    return poly
-	  };
-	  Polygon.prototype.getGeometryType = function getGeometryType () {
-	    return 'Polygon'
-	  };
-	  Polygon.prototype.copy = function copy () {
-	    var this$1 = this;
+	  function wiki(selection) {
+	    var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+	    wrap = wrap.enter().append('div').attr('class', "form-field-input-wrap form-field-input-".concat(field.type)).merge(wrap);
+	    var langContainer = wrap.selectAll('.wiki-lang-container').data([0]);
+	    langContainer = langContainer.enter().append('div').attr('class', 'wiki-lang-container').merge(langContainer);
+	    _langInput = langContainer.selectAll('input.wiki-lang').data([0]);
+	    _langInput = _langInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-lang').attr('placeholder', _t('translate.localized_translation_language')).call(utilNoAuto).call(langCombo).merge(_langInput);
+
+	    _langInput.on('blur', changeLang).on('change', changeLang);
+
+	    var titleContainer = wrap.selectAll('.wiki-title-container').data([0]);
+	    titleContainer = titleContainer.enter().append('div').attr('class', 'wiki-title-container').merge(titleContainer);
+	    _titleInput = titleContainer.selectAll('input.wiki-title').data([0]);
+	    _titleInput = _titleInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-title').attr('id', field.domId).call(utilNoAuto).call(titleCombo).merge(_titleInput);
+
+	    _titleInput.on('blur', blur).on('change', change);
+
+	    var link = titleContainer.selectAll('.wiki-link').data([0]);
+	    link = link.enter().append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
+	      domain: 'wikipedia.org'
+	    })).call(svgIcon('#iD-icon-out-link')).merge(link);
+	    link.on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      if (_wikiURL) window.open(_wikiURL, '_blank');
+	    });
+	  }
 
-	    var shell = this._shell.copy();
-	    var holes = new Array(this._holes.length).fill(null);
-	    for (var i = 0; i < holes.length; i++) {
-	      holes[i] = this$1._holes[i].copy();
-	    }
-	    return new Polygon(shell, holes, this._factory)
-	  };
-	  Polygon.prototype.getExteriorRing = function getExteriorRing () {
-	    return this._shell
-	  };
-	  Polygon.prototype.isEmpty = function isEmpty () {
-	    return this._shell.isEmpty()
-	  };
-	  Polygon.prototype.getInteriorRingN = function getInteriorRingN (n) {
-	    return this._holes[n]
-	  };
-	  Polygon.prototype.interfaces_ = function interfaces_ () {
-	    return [Polygonal]
-	  };
-	  Polygon.prototype.getClass = function getClass () {
-	    return Polygon
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return -3494792200821764533 };
+	  function defaultLanguageInfo(skipEnglishFallback) {
+	    var langCode = _mainLocalizer.languageCode().toLowerCase();
+
+	    for (var i in _dataWikipedia) {
+	      var d = _dataWikipedia[i]; // default to the language of iD's current locale
 
-	  Object.defineProperties( Polygon, staticAccessors );
+	      if (d[2] === langCode) return d;
+	    } // fallback to English
 
-	  return Polygon;
-	}(Geometry));
 
-	var MultiPoint = (function (GeometryCollection$$1) {
-	  function MultiPoint () {
-	    GeometryCollection$$1.apply(this, arguments);
+	    return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
 	  }
 
-	  if ( GeometryCollection$$1 ) { MultiPoint.__proto__ = GeometryCollection$$1; }
-	  MultiPoint.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-	  MultiPoint.prototype.constructor = MultiPoint;
+	  function language(skipEnglishFallback) {
+	    var value = utilGetSetValue(_langInput).toLowerCase();
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
+	    for (var i in _dataWikipedia) {
+	      var d = _dataWikipedia[i]; // return the language already set in the UI, if supported
 
-	  MultiPoint.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry.SORTINDEX_MULTIPOINT
-	  };
-	  MultiPoint.prototype.isValid = function isValid () {
-	    return true
-	  };
-	  MultiPoint.prototype.equalsExact = function equalsExact () {
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
-	      }
-	      return GeometryCollection$$1.prototype.equalsExact.call(this, other, tolerance)
-	    } else { return GeometryCollection$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  MultiPoint.prototype.getCoordinate = function getCoordinate () {
-	    if (arguments.length === 1) {
-	      var n = arguments[0];
-	      return this._geometries[n].getCoordinate()
-	    } else { return GeometryCollection$$1.prototype.getCoordinate.apply(this, arguments) }
-	  };
-	  MultiPoint.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return Dimension.FALSE
-	  };
-	  MultiPoint.prototype.getDimension = function getDimension () {
-	    return 0
-	  };
-	  MultiPoint.prototype.getBoundary = function getBoundary () {
-	    return this.getFactory().createGeometryCollection(null)
-	  };
-	  MultiPoint.prototype.getGeometryType = function getGeometryType () {
-	    return 'MultiPoint'
-	  };
-	  MultiPoint.prototype.copy = function copy () {
-	    var this$1 = this;
+	      if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
+	    } // fallback to English
 
-	    var points = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < points.length; i++) {
-	      points[i] = this$1._geometries[i].copy();
-	    }
-	    return new MultiPoint(points, this._factory)
-	  };
-	  MultiPoint.prototype.interfaces_ = function interfaces_ () {
-	    return [Puntal]
-	  };
-	  MultiPoint.prototype.getClass = function getClass () {
-	    return MultiPoint
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return -8048474874175355449 };
 
-	  Object.defineProperties( MultiPoint, staticAccessors );
+	    return defaultLanguageInfo(skipEnglishFallback);
+	  }
 
-	  return MultiPoint;
-	}(GeometryCollection));
+	  function changeLang() {
+	    utilGetSetValue(_langInput, language()[1]);
+	    change(true);
+	  }
 
-	var LinearRing = (function (LineString$$1) {
-	  function LinearRing (points, factory) {
-	    if (points instanceof Coordinate && factory instanceof GeometryFactory) {
-	      points = factory.getCoordinateSequenceFactory().create(points);
-	    }
-	    LineString$$1.call(this, points, factory);
-	    this.validateConstruction();
+	  function blur() {
+	    change(true);
 	  }
 
-	  if ( LineString$$1 ) { LinearRing.__proto__ = LineString$$1; }
-	  LinearRing.prototype = Object.create( LineString$$1 && LineString$$1.prototype );
-	  LinearRing.prototype.constructor = LinearRing;
+	  function change(skipWikidata) {
+	    var value = utilGetSetValue(_titleInput);
+	    var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
 
-	  var staticAccessors = { MINIMUM_VALID_SIZE: { configurable: true },serialVersionUID: { configurable: true } };
-	  LinearRing.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry.SORTINDEX_LINEARRING
-	  };
-	  LinearRing.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return Dimension.FALSE
-	  };
-	  LinearRing.prototype.isClosed = function isClosed () {
-	    if (this.isEmpty()) {
-	      return true
-	    }
-	    return LineString$$1.prototype.isClosed.call(this)
-	  };
-	  LinearRing.prototype.reverse = function reverse () {
-	    var seq = this._points.copy();
-	    CoordinateSequences.reverse(seq);
-	    var rev = this.getFactory().createLinearRing(seq);
-	    return rev
-	  };
-	  LinearRing.prototype.validateConstruction = function validateConstruction () {
-	    if (!this.isEmpty() && !LineString$$1.prototype.isClosed.call(this)) {
-	      throw new IllegalArgumentException('Points of LinearRing do not form a closed linestring')
-	    }
-	    if (this.getCoordinateSequence().size() >= 1 && this.getCoordinateSequence().size() < LinearRing.MINIMUM_VALID_SIZE) {
-	      throw new IllegalArgumentException('Invalid number of points in LinearRing (found ' + this.getCoordinateSequence().size() + ' - must be 0 or >= 4)')
-	    }
-	  };
-	  LinearRing.prototype.getGeometryType = function getGeometryType () {
-	    return 'LinearRing'
-	  };
-	  LinearRing.prototype.copy = function copy () {
-	    return new LinearRing(this._points.copy(), this._factory)
-	  };
-	  LinearRing.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  LinearRing.prototype.getClass = function getClass () {
-	    return LinearRing
-	  };
-	  staticAccessors.MINIMUM_VALID_SIZE.get = function () { return 4 };
-	  staticAccessors.serialVersionUID.get = function () { return -4261142084085851829 };
+	    var langInfo = m && _dataWikipedia.find(function (d) {
+	      return m[1] === d[2];
+	    });
 
-	  Object.defineProperties( LinearRing, staticAccessors );
+	    var syncTags = {};
 
-	  return LinearRing;
-	}(LineString));
+	    if (langInfo) {
+	      var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
 
-	var MultiPolygon = (function (GeometryCollection$$1) {
-	  function MultiPolygon () {
-	    GeometryCollection$$1.apply(this, arguments);
-	  }
+	      value = decodeURIComponent(m[2]).replace(/_/g, ' ');
 
-	  if ( GeometryCollection$$1 ) { MultiPolygon.__proto__ = GeometryCollection$$1; }
-	  MultiPolygon.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-	  MultiPolygon.prototype.constructor = MultiPolygon;
+	      if (m[3]) {
+	        var anchor; // try {
+	        // leave this out for now - #6232
+	        // Best-effort `anchordecode:` implementation
+	        // anchor = decodeURIComponent(m[3].replace(/\.([0-9A-F]{2})/g, '%$1'));
+	        // } catch (e) {
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
+	        anchor = decodeURIComponent(m[3]); // }
 
-	  MultiPolygon.prototype.getSortIndex = function getSortIndex () {
-	    return Geometry.SORTINDEX_MULTIPOLYGON
-	  };
-	  MultiPolygon.prototype.equalsExact = function equalsExact () {
-	    if (arguments.length === 2) {
-	      var other = arguments[0];
-	      var tolerance = arguments[1];
-	      if (!this.isEquivalentClass(other)) {
-	        return false
+	        value += '#' + anchor.replace(/_/g, ' ');
 	      }
-	      return GeometryCollection$$1.prototype.equalsExact.call(this, other, tolerance)
-	    } else { return GeometryCollection$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  MultiPolygon.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    return 1
-	  };
-	  MultiPolygon.prototype.getDimension = function getDimension () {
-	    return 2
-	  };
-	  MultiPolygon.prototype.reverse = function reverse () {
-	    var this$1 = this;
 
-	    var n = this._geometries.length;
-	    var revGeoms = new Array(n).fill(null);
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      revGeoms[i] = this$1._geometries[i].reverse();
+	      value = value.slice(0, 1).toUpperCase() + value.slice(1);
+	      utilGetSetValue(_langInput, nativeLangName);
+	      utilGetSetValue(_titleInput, value);
 	    }
-	    return this.getFactory().createMultiPolygon(revGeoms)
-	  };
-	  MultiPolygon.prototype.getBoundary = function getBoundary () {
-	    var this$1 = this;
 
-	    if (this.isEmpty()) {
-	      return this.getFactory().createMultiLineString()
-	    }
-	    var allRings = new ArrayList();
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      var polygon = this$1._geometries[i];
-	      var rings = polygon.getBoundary();
-	      for (var j = 0; j < rings.getNumGeometries(); j++) {
-	        allRings.add(rings.getGeometryN(j));
-	      }
+	    if (value) {
+	      syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
+	    } else {
+	      syncTags.wikipedia = undefined;
 	    }
-	    var allRingsArray = new Array(allRings.size()).fill(null);
-	    return this.getFactory().createMultiLineString(allRings.toArray(allRingsArray))
-	  };
-	  MultiPolygon.prototype.getGeometryType = function getGeometryType () {
-	    return 'MultiPolygon'
-	  };
-	  MultiPolygon.prototype.copy = function copy () {
-	    var this$1 = this;
 
-	    var polygons = new Array(this._geometries.length).fill(null);
-	    for (var i = 0; i < polygons.length; i++) {
-	      polygons[i] = this$1._geometries[i].copy();
-	    }
-	    return new MultiPolygon(polygons, this._factory)
-	  };
-	  MultiPolygon.prototype.interfaces_ = function interfaces_ () {
-	    return [Polygonal]
-	  };
-	  MultiPolygon.prototype.getClass = function getClass () {
-	    return MultiPolygon
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return -551033529766975875 };
+	    dispatch$1.call('change', this, syncTags);
+	    if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..
+
+	    var initGraph = context.graph();
+	    var initEntityIDs = _entityIDs;
+	    wikidata.itemsByTitle(language()[2], value, function (err, data) {
+	      if (err || !data || !Object.keys(data).length) return; // If graph has changed, we can't apply this update.
 
-	  Object.defineProperties( MultiPolygon, staticAccessors );
+	      if (context.graph() !== initGraph) return;
+	      var qids = Object.keys(data);
+	      var value = qids && qids.find(function (id) {
+	        return id.match(/^Q\d+$/);
+	      });
+	      var actions = initEntityIDs.map(function (entityID) {
+	        var entity = context.entity(entityID).tags;
+	        var currTags = Object.assign({}, entity); // shallow copy
 
-	  return MultiPolygon;
-	}(GeometryCollection));
+	        if (currTags.wikidata !== value) {
+	          currTags.wikidata = value;
+	          return actionChangeTags(entityID, currTags);
+	        }
 
-	var GeometryEditor = function GeometryEditor (factory) {
-	  this._factory = factory || null;
-	  this._isUserDataCopied = false;
-	};
+	        return null;
+	      }).filter(Boolean);
+	      if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
 
-	var staticAccessors$16 = { NoOpGeometryOperation: { configurable: true },CoordinateOperation: { configurable: true },CoordinateSequenceOperation: { configurable: true } };
-	GeometryEditor.prototype.setCopyUserData = function setCopyUserData (isUserDataCopied) {
-	  this._isUserDataCopied = isUserDataCopied;
-	};
-	GeometryEditor.prototype.edit = function edit (geometry, operation) {
-	  if (geometry === null) { return null }
-	  var result = this.editInternal(geometry, operation);
-	  if (this._isUserDataCopied) {
-	    result.setUserData(geometry.getUserData());
-	  }
-	  return result
-	};
-	GeometryEditor.prototype.editInternal = function editInternal (geometry, operation) {
-	  if (this._factory === null) { this._factory = geometry.getFactory(); }
-	  if (geometry instanceof GeometryCollection) {
-	    return this.editGeometryCollection(geometry, operation)
-	  }
-	  if (geometry instanceof Polygon) {
-	    return this.editPolygon(geometry, operation)
-	  }
-	  if (geometry instanceof Point$1) {
-	    return operation.edit(geometry, this._factory)
-	  }
-	  if (geometry instanceof LineString) {
-	    return operation.edit(geometry, this._factory)
+	      context.overwrite(function actionUpdateWikidataTags(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
+	        });
+	        return graph;
+	      }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
+	      // changeTags() is not intended to be called asynchronously
+	    });
 	  }
-	  Assert.shouldNeverReachHere('Unsupported Geometry class: ' + geometry.getClass().getName());
-	  return null
-	};
-	GeometryEditor.prototype.editGeometryCollection = function editGeometryCollection (collection, operation) {
-	    var this$1 = this;
 
-	  var collectionForType = operation.edit(collection, this._factory);
-	  var geometries = new ArrayList();
-	  for (var i = 0; i < collectionForType.getNumGeometries(); i++) {
-	    var geometry = this$1.edit(collectionForType.getGeometryN(i), operation);
-	    if (geometry === null || geometry.isEmpty()) {
-	      continue
-	    }
-	    geometries.add(geometry);
-	  }
-	  if (collectionForType.getClass() === MultiPoint) {
-	    return this._factory.createMultiPoint(geometries.toArray([]))
-	  }
-	  if (collectionForType.getClass() === MultiLineString) {
-	    return this._factory.createMultiLineString(geometries.toArray([]))
-	  }
-	  if (collectionForType.getClass() === MultiPolygon) {
-	    return this._factory.createMultiPolygon(geometries.toArray([]))
-	  }
-	  return this._factory.createGeometryCollection(geometries.toArray([]))
-	};
-	GeometryEditor.prototype.editPolygon = function editPolygon (polygon, operation) {
-	    var this$1 = this;
+	  wiki.tags = function (tags) {
+	    _tags = tags;
+	    updateForTags(tags);
+	  };
 
-	  var newPolygon = operation.edit(polygon, this._factory);
-	  if (newPolygon === null) { newPolygon = this._factory.createPolygon(null); }
-	  if (newPolygon.isEmpty()) {
-	    return newPolygon
-	  }
-	  var shell = this.edit(newPolygon.getExteriorRing(), operation);
-	  if (shell === null || shell.isEmpty()) {
-	    return this._factory.createPolygon()
-	  }
-	  var holes = new ArrayList();
-	  for (var i = 0; i < newPolygon.getNumInteriorRing(); i++) {
-	    var hole = this$1.edit(newPolygon.getInteriorRingN(i), operation);
-	    if (hole === null || hole.isEmpty()) {
-	      continue
-	    }
-	    holes.add(hole);
-	  }
-	  return this._factory.createPolygon(shell, holes.toArray([]))
-	};
-	GeometryEditor.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryEditor.prototype.getClass = function getClass () {
-	  return GeometryEditor
-	};
-	GeometryEditor.GeometryEditorOperation = function GeometryEditorOperation () {};
-	staticAccessors$16.NoOpGeometryOperation.get = function () { return NoOpGeometryOperation };
-	staticAccessors$16.CoordinateOperation.get = function () { return CoordinateOperation };
-	staticAccessors$16.CoordinateSequenceOperation.get = function () { return CoordinateSequenceOperation };
+	  function updateForTags(tags) {
+	    var value = typeof tags[field.key] === 'string' ? tags[field.key] : ''; // Expect tag format of `tagLang:tagArticleTitle`, e.g. `fr:Paris`, with
+	    // optional suffix of `#anchor`
 
-	Object.defineProperties( GeometryEditor, staticAccessors$16 );
+	    var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
+	    var tagLang = m && m[1];
+	    var tagArticleTitle = m && m[2];
+	    var anchor = m && m[3];
 
-	var NoOpGeometryOperation = function NoOpGeometryOperation () {};
+	    var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
+	      return tagLang === d[2];
+	    }); // value in correct format
 
-	NoOpGeometryOperation.prototype.edit = function edit (geometry, factory) {
-	  return geometry
-	};
-	NoOpGeometryOperation.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryEditor.GeometryEditorOperation]
-	};
-	NoOpGeometryOperation.prototype.getClass = function getClass () {
-	  return NoOpGeometryOperation
-	};
 
-	var CoordinateOperation = function CoordinateOperation () {};
+	    if (tagLangInfo) {
+	      var nativeLangName = tagLangInfo[1];
+	      utilGetSetValue(_langInput, nativeLangName);
+	      utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));
 
-	CoordinateOperation.prototype.edit = function edit (geometry, factory) {
-	  var coords = this.editCoordinates(geometry.getCoordinates(), geometry);
-	  if (coords === null) { return geometry }
-	  if (geometry instanceof LinearRing) {
-	    return factory.createLinearRing(coords)
-	  }
-	  if (geometry instanceof LineString) {
-	    return factory.createLineString(coords)
-	  }
-	  if (geometry instanceof Point$1) {
-	    if (coords.length > 0) {
-	      return factory.createPoint(coords[0])
+	      if (anchor) {
+	        try {
+	          // Best-effort `anchorencode:` implementation
+	          anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
+	        } catch (e) {
+	          anchor = anchor.replace(/ /g, '_');
+	        }
+	      }
+
+	      _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
 	    } else {
-	      return factory.createPoint()
+	      utilGetSetValue(_titleInput, value);
+
+	      if (value && value !== '') {
+	        utilGetSetValue(_langInput, '');
+	        var defaultLangInfo = defaultLanguageInfo();
+	        _wikiURL = "https://".concat(defaultLangInfo[2], ".wikipedia.org/w/index.php?fulltext=1&search=").concat(value);
+	      } else {
+	        var shownOrDefaultLangInfo = language(true
+	        /* skipEnglishFallback */
+	        );
+	        utilGetSetValue(_langInput, shownOrDefaultLangInfo[1]);
+	        _wikiURL = '';
+	      }
 	    }
 	  }
-	  return geometry
-	};
-	CoordinateOperation.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryEditor.GeometryEditorOperation]
-	};
-	CoordinateOperation.prototype.getClass = function getClass () {
-	  return CoordinateOperation
-	};
 
-	var CoordinateSequenceOperation = function CoordinateSequenceOperation () {};
+	  wiki.entityIDs = function (val) {
+	    if (!_arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return wiki;
+	  };
 
-	CoordinateSequenceOperation.prototype.edit = function edit (geometry, factory) {
-	  if (geometry instanceof LinearRing) {
-	    return factory.createLinearRing(this.edit(geometry.getCoordinateSequence(), geometry))
-	  }
-	  if (geometry instanceof LineString) {
-	    return factory.createLineString(this.edit(geometry.getCoordinateSequence(), geometry))
-	  }
-	  if (geometry instanceof Point$1) {
-	    return factory.createPoint(this.edit(geometry.getCoordinateSequence(), geometry))
-	  }
-	  return geometry
-	};
-	CoordinateSequenceOperation.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryEditor.GeometryEditorOperation]
-	};
-	CoordinateSequenceOperation.prototype.getClass = function getClass () {
-	  return CoordinateSequenceOperation
+	  wiki.focus = function () {
+	    _titleInput.node().focus();
+	  };
+
+	  return utilRebind(wiki, dispatch$1, 'on');
+	}
+	uiFieldWikipedia.supportsMultiselection = false;
+
+	var uiFields = {
+	  access: uiFieldAccess,
+	  address: uiFieldAddress,
+	  check: uiFieldCheck,
+	  combo: uiFieldCombo,
+	  cycleway: uiFieldCycleway,
+	  defaultCheck: uiFieldCheck,
+	  email: uiFieldText,
+	  identifier: uiFieldText,
+	  lanes: uiFieldLanes,
+	  localized: uiFieldLocalized,
+	  maxspeed: uiFieldMaxspeed,
+	  manyCombo: uiFieldCombo,
+	  multiCombo: uiFieldCombo,
+	  networkCombo: uiFieldCombo,
+	  number: uiFieldText,
+	  onewayCheck: uiFieldCheck,
+	  radio: uiFieldRadio,
+	  restrictions: uiFieldRestrictions,
+	  semiCombo: uiFieldCombo,
+	  structureRadio: uiFieldRadio,
+	  tel: uiFieldText,
+	  text: uiFieldText,
+	  textarea: uiFieldTextarea,
+	  typeCombo: uiFieldCombo,
+	  url: uiFieldText,
+	  wikidata: uiFieldWikidata,
+	  wikipedia: uiFieldWikipedia
 	};
 
-	var CoordinateArraySequence = function CoordinateArraySequence () {
-	  var this$1 = this;
+	function uiField(context, presetField, entityIDs, options) {
+	  options = Object.assign({
+	    show: true,
+	    wrap: true,
+	    remove: true,
+	    revert: true,
+	    info: true
+	  }, options);
+	  var dispatch$1 = dispatch('change', 'revert');
+	  var field = Object.assign({}, presetField); // shallow copy
+
+	  field.domId = utilUniqueDomId('form-field-' + field.safeid);
+	  var _show = options.show;
+	  var _state = '';
+	  var _tags = {};
+	  var _locked = false;
+
+	  var _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
+	    label: field.label
+	  })).placement('bottom');
+
+	  field.keys = field.keys || [field.key]; // only create the fields that are actually being shown
+
+	  if (_show && !field.impl) {
+	    createField();
+	  } // Creates the field.. This is done lazily,
+	  // once we know that the field will be shown.
+
+
+	  function createField() {
+	    field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
+	      dispatch$1.call('change', field, t, onInput);
+	    });
 
-	  this._dimension = 3;
-	  this._coordinates = null;
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      this._coordinates = arguments[0];
-	      this._dimension = 3;
-	    } else if (Number.isInteger(arguments[0])) {
-	      var size = arguments[0];
-	      this._coordinates = new Array(size).fill(null);
-	      for (var i = 0; i < size; i++) {
-	        this$1._coordinates[i] = new Coordinate();
-	      }
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordSeq = arguments[0];
-	      if (coordSeq === null) {
-	        this._coordinates = new Array(0).fill(null);
-	        return null
-	      }
-	      this._dimension = coordSeq.getDimension();
-	      this._coordinates = new Array(coordSeq.size()).fill(null);
-	      for (var i$1 = 0; i$1 < this._coordinates.length; i$1++) {
-	        this$1._coordinates[i$1] = coordSeq.getCoordinateCopy(i$1);
-	      }
-	    }
-	  } else if (arguments.length === 2) {
-	    if (arguments[0] instanceof Array && Number.isInteger(arguments[1])) {
-	      var coordinates = arguments[0];
-	      var dimension = arguments[1];
-	      this._coordinates = coordinates;
-	      this._dimension = dimension;
-	      if (coordinates === null) { this._coordinates = new Array(0).fill(null); }
-	    } else if (Number.isInteger(arguments[0]) && Number.isInteger(arguments[1])) {
-	      var size$1 = arguments[0];
-	      var dimension$1 = arguments[1];
-	      this._coordinates = new Array(size$1).fill(null);
-	      this._dimension = dimension$1;
-	      for (var i$2 = 0; i$2 < size$1; i$2++) {
-	        this$1._coordinates[i$2] = new Coordinate();
+	    if (entityIDs) {
+	      field.entityIDs = entityIDs; // if this field cares about the entities, pass them along
+
+	      if (field.impl.entityIDs) {
+	        field.impl.entityIDs(entityIDs);
 	      }
 	    }
 	  }
-	};
 
-	var staticAccessors$18 = { serialVersionUID: { configurable: true } };
-	CoordinateArraySequence.prototype.setOrdinate = function setOrdinate (index, ordinateIndex, value) {
-	  switch (ordinateIndex) {
-	    case CoordinateSequence.X:
-	      this._coordinates[index].x = value;
-	      break
-	    case CoordinateSequence.Y:
-	      this._coordinates[index].y = value;
-	      break
-	    case CoordinateSequence.Z:
-	      this._coordinates[index].z = value;
-	      break
-	    default:
-	      throw new IllegalArgumentException('invalid ordinateIndex')
-	  }
-	};
-	CoordinateArraySequence.prototype.size = function size () {
-	  return this._coordinates.length
-	};
-	CoordinateArraySequence.prototype.getOrdinate = function getOrdinate (index, ordinateIndex) {
-	  switch (ordinateIndex) {
-	    case CoordinateSequence.X:
-	      return this._coordinates[index].x
-	    case CoordinateSequence.Y:
-	      return this._coordinates[index].y
-	    case CoordinateSequence.Z:
-	      return this._coordinates[index].z
-	  }
-	  return Double.NaN
-	};
-	CoordinateArraySequence.prototype.getCoordinate = function getCoordinate () {
-	  if (arguments.length === 1) {
-	    var i = arguments[0];
-	    return this._coordinates[i]
-	  } else if (arguments.length === 2) {
-	    var index = arguments[0];
-	    var coord = arguments[1];
-	    coord.x = this._coordinates[index].x;
-	    coord.y = this._coordinates[index].y;
-	    coord.z = this._coordinates[index].z;
+	  function isModified() {
+	    if (!entityIDs || !entityIDs.length) return false;
+	    return entityIDs.some(function (entityID) {
+	      var original = context.graph().base().entities[entityID];
+	      var latest = context.graph().entity(entityID);
+	      return field.keys.some(function (key) {
+	        return original ? latest.tags[key] !== original.tags[key] : latest.tags[key];
+	      });
+	    });
 	  }
-	};
-	CoordinateArraySequence.prototype.getCoordinateCopy = function getCoordinateCopy (i) {
-	  return new Coordinate(this._coordinates[i])
-	};
-	CoordinateArraySequence.prototype.getDimension = function getDimension () {
-	  return this._dimension
-	};
-	CoordinateArraySequence.prototype.getX = function getX (index) {
-	  return this._coordinates[index].x
-	};
-	CoordinateArraySequence.prototype.clone = function clone () {
-	    var this$1 = this;
 
-	  var cloneCoordinates = new Array(this.size()).fill(null);
-	  for (var i = 0; i < this._coordinates.length; i++) {
-	    cloneCoordinates[i] = this$1._coordinates[i].clone();
-	  }
-	  return new CoordinateArraySequence(cloneCoordinates, this._dimension)
-	};
-	CoordinateArraySequence.prototype.expandEnvelope = function expandEnvelope (env) {
-	    var this$1 = this;
+	  function tagsContainFieldKey() {
+	    return field.keys.some(function (key) {
+	      if (field.type === 'multiCombo') {
+	        for (var tagKey in _tags) {
+	          if (tagKey.indexOf(key) === 0) {
+	            return true;
+	          }
+	        }
+
+	        return false;
+	      }
 
-	  for (var i = 0; i < this._coordinates.length; i++) {
-	    env.expandToInclude(this$1._coordinates[i]);
+	      return _tags[key] !== undefined;
+	    });
 	  }
-	  return env
-	};
-	CoordinateArraySequence.prototype.copy = function copy () {
-	    var this$1 = this;
 
-	  var cloneCoordinates = new Array(this.size()).fill(null);
-	  for (var i = 0; i < this._coordinates.length; i++) {
-	    cloneCoordinates[i] = this$1._coordinates[i].copy();
+	  function revert(d3_event, d) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	    if (!entityIDs || _locked) return;
+	    dispatch$1.call('revert', d, d.keys);
 	  }
-	  return new CoordinateArraySequence(cloneCoordinates, this._dimension)
-	};
-	CoordinateArraySequence.prototype.toString = function toString () {
-	    var this$1 = this;
-
-	  if (this._coordinates.length > 0) {
-	    var strBuf = new StringBuffer(17 * this._coordinates.length);
-	    strBuf.append('(');
-	    strBuf.append(this._coordinates[0]);
-	    for (var i = 1; i < this._coordinates.length; i++) {
-	      strBuf.append(', ');
-	      strBuf.append(this$1._coordinates[i]);
-	    }
-	    strBuf.append(')');
-	    return strBuf.toString()
-	  } else {
-	    return '()'
+
+	  function remove(d3_event, d) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	    if (_locked) return;
+	    var t = {};
+	    d.keys.forEach(function (key) {
+	      t[key] = undefined;
+	    });
+	    dispatch$1.call('change', d, t);
 	  }
-	};
-	CoordinateArraySequence.prototype.getY = function getY (index) {
-	  return this._coordinates[index].y
-	};
-	CoordinateArraySequence.prototype.toCoordinateArray = function toCoordinateArray () {
-	  return this._coordinates
-	};
-	CoordinateArraySequence.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequence, Serializable]
-	};
-	CoordinateArraySequence.prototype.getClass = function getClass () {
-	  return CoordinateArraySequence
-	};
-	staticAccessors$18.serialVersionUID.get = function () { return -915438501601840650 };
 
-	Object.defineProperties( CoordinateArraySequence, staticAccessors$18 );
+	  field.render = function (selection) {
+	    var container = selection.selectAll('.form-field').data([field]); // Enter
 
-	var CoordinateArraySequenceFactory = function CoordinateArraySequenceFactory () {};
+	    var enter = container.enter().append('div').attr('class', function (d) {
+	      return 'form-field form-field-' + d.safeid;
+	    }).classed('nowrap', !options.wrap);
 
-	var staticAccessors$17 = { serialVersionUID: { configurable: true },instanceObject: { configurable: true } };
+	    if (options.wrap) {
+	      var labelEnter = enter.append('label').attr('class', 'field-label').attr('for', function (d) {
+	        return d.domId;
+	      });
+	      var textEnter = labelEnter.append('span').attr('class', 'label-text');
+	      textEnter.append('span').attr('class', 'label-textvalue').html(function (d) {
+	        return d.label();
+	      });
+	      textEnter.append('span').attr('class', 'label-textannotation');
 
-	CoordinateArraySequenceFactory.prototype.readResolve = function readResolve () {
-	  return CoordinateArraySequenceFactory.instance()
-	};
-	CoordinateArraySequenceFactory.prototype.create = function create () {
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      var coordinates = arguments[0];
-	      return new CoordinateArraySequence(coordinates)
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordSeq = arguments[0];
-	      return new CoordinateArraySequence(coordSeq)
-	    }
-	  } else if (arguments.length === 2) {
-	    var size = arguments[0];
-	    var dimension = arguments[1];
-	    if (dimension > 3) { dimension = 3; }
-	    if (dimension < 2) { return new CoordinateArraySequence(size) }
-	    return new CoordinateArraySequence(size, dimension)
-	  }
-	};
-	CoordinateArraySequenceFactory.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequenceFactory, Serializable]
-	};
-	CoordinateArraySequenceFactory.prototype.getClass = function getClass () {
-	  return CoordinateArraySequenceFactory
-	};
-	CoordinateArraySequenceFactory.instance = function instance () {
-	  return CoordinateArraySequenceFactory.instanceObject
-	};
+	      if (options.remove) {
+	        labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
+	      }
 
-	staticAccessors$17.serialVersionUID.get = function () { return -4099577099607551657 };
-	staticAccessors$17.instanceObject.get = function () { return new CoordinateArraySequenceFactory() };
+	      if (options.revert) {
+	        labelEnter.append('button').attr('class', 'modified-icon').attr('title', _t('icons.undo')).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo'));
+	      }
+	    } // Update
 
-	Object.defineProperties( CoordinateArraySequenceFactory, staticAccessors$17 );
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/HashMap.html
-	 *
-	 * @extends {javascript.util.Map}
-	 * @constructor
-	 * @private
-	 */
-	var HashMap = (function (MapInterface) {
-	  function HashMap () {
-	    MapInterface.call(this);
-	    this.map_ = new Map();
-	  }
+	    container = container.merge(enter);
+	    container.select('.field-label > .remove-icon') // propagate bound data
+	    .on('click', remove);
+	    container.select('.field-label > .modified-icon') // propagate bound data
+	    .on('click', revert);
+	    container.each(function (d) {
+	      var selection = select(this);
 
-	  if ( MapInterface ) { HashMap.__proto__ = MapInterface; }
-	  HashMap.prototype = Object.create( MapInterface && MapInterface.prototype );
-	  HashMap.prototype.constructor = HashMap;
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.get = function get (key) {
-	    return this.map_.get(key) || null
+	      if (!d.impl) {
+	        createField();
+	      }
+
+	      var reference, help; // instantiate field help
+
+	      if (options.wrap && field.type === 'restrictions') {
+	        help = uiFieldHelp(context, 'restrictions');
+	      } // instantiate tag reference
+
+
+	      if (options.wrap && options.info) {
+	        var referenceKey = d.key || '';
+
+	        if (d.type === 'multiCombo') {
+	          // lookup key without the trailing ':'
+	          referenceKey = referenceKey.replace(/:$/, '');
+	        }
+
+	        reference = uiTagReference(d.reference || {
+	          key: referenceKey
+	        });
+
+	        if (_state === 'hover') {
+	          reference.showing(false);
+	        }
+	      }
+
+	      selection.call(d.impl); // add field help components
+
+	      if (help) {
+	        selection.call(help.body).select('.field-label').call(help.button);
+	      } // add tag reference components
+
+
+	      if (reference) {
+	        selection.call(reference.body).select('.field-label').call(reference.button);
+	      }
+
+	      d.impl.tags(_tags);
+	    });
+	    container.classed('locked', _locked).classed('modified', isModified()).classed('present', tagsContainFieldKey()); // show a tip and lock icon if the field is locked
+
+	    var annotation = container.selectAll('.field-label .label-textannotation');
+	    var icon = annotation.selectAll('.icon').data(_locked ? [0] : []);
+	    icon.exit().remove();
+	    icon.enter().append('svg').attr('class', 'icon').append('use').attr('xlink:href', '#fas-lock');
+	    container.call(_locked ? _lockedTip : _lockedTip.destroy);
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.put = function put (key, value) {
-	    this.map_.set(key, value);
-	    return value
+	  field.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return field;
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.values = function values () {
-	    var arrayList = new ArrayList();
-	    var it = this.map_.values();
-	    var o = it.next();
-	    while (!o.done) {
-	      arrayList.add(o.value);
-	      o = it.next();
+	  field.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
+
+	    if (tagsContainFieldKey() && !_show) {
+	      // always show a field if it has a value to display
+	      _show = true;
+
+	      if (!field.impl) {
+	        createField();
+	      }
 	    }
-	    return arrayList
+
+	    return field;
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.entrySet = function entrySet () {
-	    var hashSet = new HashSet();
-	    this.map_.entries().forEach(function (entry) { return hashSet.add(entry); });
-	    return hashSet
+	  field.locked = function (val) {
+	    if (!arguments.length) return _locked;
+	    _locked = val;
+	    return field;
 	  };
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.size = function size () {
-	    return this.map_.size()
-	  };
-
-	  return HashMap;
-	}(Map$1$1));
-
-	var PrecisionModel = function PrecisionModel () {
-	  this._modelType = null;
-	  this._scale = null;
-	  if (arguments.length === 0) {
-	    this._modelType = PrecisionModel.FLOATING;
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Type$2) {
-	      var modelType = arguments[0];
-	      this._modelType = modelType;
-	      if (modelType === PrecisionModel.FIXED) {
-	        this.setScale(1.0);
-	      }
-	    } else if (typeof arguments[0] === 'number') {
-	      var scale = arguments[0];
-	      this._modelType = PrecisionModel.FIXED;
-	      this.setScale(scale);
-	    } else if (arguments[0] instanceof PrecisionModel) {
-	      var pm = arguments[0];
-	      this._modelType = pm._modelType;
-	      this._scale = pm._scale;
+	  field.show = function () {
+	    _show = true;
+
+	    if (!field.impl) {
+	      createField();
 	    }
-	  }
-	};
 
-	var staticAccessors$19 = { serialVersionUID: { configurable: true },maximumPreciseValue: { configurable: true } };
-	PrecisionModel.prototype.equals = function equals (other) {
-	  if (!(other instanceof PrecisionModel)) {
-	    return false
-	  }
-	  var otherPrecisionModel = other;
-	  return this._modelType === otherPrecisionModel._modelType && this._scale === otherPrecisionModel._scale
-	};
-	PrecisionModel.prototype.compareTo = function compareTo (o) {
-	  var other = o;
-	  var sigDigits = this.getMaximumSignificantDigits();
-	  var otherSigDigits = other.getMaximumSignificantDigits();
-	  return new Integer(sigDigits).compareTo(new Integer(otherSigDigits))
-	};
-	PrecisionModel.prototype.getScale = function getScale () {
-	  return this._scale
-	};
-	PrecisionModel.prototype.isFloating = function isFloating () {
-	  return this._modelType === PrecisionModel.FLOATING || this._modelType === PrecisionModel.FLOATING_SINGLE
-	};
-	PrecisionModel.prototype.getType = function getType () {
-	  return this._modelType
-	};
-	PrecisionModel.prototype.toString = function toString () {
-	  var description = 'UNKNOWN';
-	  if (this._modelType === PrecisionModel.FLOATING) {
-	    description = 'Floating';
-	  } else if (this._modelType === PrecisionModel.FLOATING_SINGLE) {
-	    description = 'Floating-Single';
-	  } else if (this._modelType === PrecisionModel.FIXED) {
-	    description = 'Fixed (Scale=' + this.getScale() + ')';
-	  }
-	  return description
-	};
-	PrecisionModel.prototype.makePrecise = function makePrecise () {
-	  if (typeof arguments[0] === 'number') {
-	    var val = arguments[0];
-	    if (Double.isNaN(val)) { return val }
-	    if (this._modelType === PrecisionModel.FLOATING_SINGLE) {
-	      var floatSingleVal = val;
-	      return floatSingleVal
-	    }
-	    if (this._modelType === PrecisionModel.FIXED) {
-	      return Math.round(val * this._scale) / this._scale
-	    }
-	    return val
-	  } else if (arguments[0] instanceof Coordinate) {
-	    var coord = arguments[0];
-	    if (this._modelType === PrecisionModel.FLOATING) { return null }
-	    coord.x = this.makePrecise(coord.x);
-	    coord.y = this.makePrecise(coord.y);
-	  }
-	};
-	PrecisionModel.prototype.getMaximumSignificantDigits = function getMaximumSignificantDigits () {
-	  var maxSigDigits = 16;
-	  if (this._modelType === PrecisionModel.FLOATING) {
-	    maxSigDigits = 16;
-	  } else if (this._modelType === PrecisionModel.FLOATING_SINGLE) {
-	    maxSigDigits = 6;
-	  } else if (this._modelType === PrecisionModel.FIXED) {
-	    maxSigDigits = 1 + Math.trunc(Math.ceil(Math.log(this.getScale()) / Math.log(10)));
-	  }
-	  return maxSigDigits
-	};
-	PrecisionModel.prototype.setScale = function setScale (scale) {
-	  this._scale = Math.abs(scale);
-	};
-	PrecisionModel.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable, Comparable]
-	};
-	PrecisionModel.prototype.getClass = function getClass () {
-	  return PrecisionModel
-	};
-	PrecisionModel.mostPrecise = function mostPrecise (pm1, pm2) {
-	  if (pm1.compareTo(pm2) >= 0) { return pm1 }
-	  return pm2
-	};
-	staticAccessors$19.serialVersionUID.get = function () { return 7777263578777803835 };
-	staticAccessors$19.maximumPreciseValue.get = function () { return 9007199254740992.0 };
+	    if (field["default"] && field.key && _tags[field.key] !== field["default"]) {
+	      var t = {};
+	      t[field.key] = field["default"];
+	      dispatch$1.call('change', this, t);
+	    }
+	  }; // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
 
-	Object.defineProperties( PrecisionModel, staticAccessors$19 );
 
-	var Type$2 = function Type (name) {
-	  this._name = name || null;
-	  Type.nameToTypeMap.put(name, this);
-	};
+	  field.isShown = function () {
+	    return _show;
+	  }; // An allowed field can appear in the UI or in the 'Add field' dropdown.
+	  // A non-allowed field is hidden from the user altogether
 
-	var staticAccessors$1$1 = { serialVersionUID: { configurable: true },nameToTypeMap: { configurable: true } };
-	Type$2.prototype.readResolve = function readResolve () {
-	  return Type$2.nameToTypeMap.get(this._name)
-	};
-	Type$2.prototype.toString = function toString () {
-	  return this._name
-	};
-	Type$2.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable]
-	};
-	Type$2.prototype.getClass = function getClass () {
-	  return Type$2
-	};
-	staticAccessors$1$1.serialVersionUID.get = function () { return -5528602631731589822 };
-	staticAccessors$1$1.nameToTypeMap.get = function () { return new HashMap() };
-
-	Object.defineProperties( Type$2, staticAccessors$1$1 );
-
-	PrecisionModel.Type = Type$2;
-	PrecisionModel.FIXED = new Type$2('FIXED');
-	PrecisionModel.FLOATING = new Type$2('FLOATING');
-	PrecisionModel.FLOATING_SINGLE = new Type$2('FLOATING SINGLE');
-
-	var GeometryFactory = function GeometryFactory () {
-	  this._precisionModel = new PrecisionModel();
-	  this._SRID = 0;
-	  this._coordinateSequenceFactory = GeometryFactory.getDefaultCoordinateSequenceFactory();
-
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    if (hasInterface(arguments[0], CoordinateSequenceFactory)) {
-	      this._coordinateSequenceFactory = arguments[0];
-	    } else if (arguments[0] instanceof PrecisionModel) {
-	      this._precisionModel = arguments[0];
-	    }
-	  } else if (arguments.length === 2) {
-	    this._precisionModel = arguments[0];
-	    this._SRID = arguments[1];
-	  } else if (arguments.length === 3) {
-	    this._precisionModel = arguments[0];
-	    this._SRID = arguments[1];
-	    this._coordinateSequenceFactory = arguments[2];
-	  }
-	};
 
-	var staticAccessors$2 = { serialVersionUID: { configurable: true } };
-	GeometryFactory.prototype.toGeometry = function toGeometry (envelope) {
-	  if (envelope.isNull()) {
-	    return this.createPoint(null)
-	  }
-	  if (envelope.getMinX() === envelope.getMaxX() && envelope.getMinY() === envelope.getMaxY()) {
-	    return this.createPoint(new Coordinate(envelope.getMinX(), envelope.getMinY()))
-	  }
-	  if (envelope.getMinX() === envelope.getMaxX() || envelope.getMinY() === envelope.getMaxY()) {
-	    return this.createLineString([new Coordinate(envelope.getMinX(), envelope.getMinY()), new Coordinate(envelope.getMaxX(), envelope.getMaxY())])
-	  }
-	  return this.createPolygon(this.createLinearRing([new Coordinate(envelope.getMinX(), envelope.getMinY()), new Coordinate(envelope.getMinX(), envelope.getMaxY()), new Coordinate(envelope.getMaxX(), envelope.getMaxY()), new Coordinate(envelope.getMaxX(), envelope.getMinY()), new Coordinate(envelope.getMinX(), envelope.getMinY())]), null)
-	};
-	GeometryFactory.prototype.createLineString = function createLineString (coordinates) {
-	  if (!coordinates) { return new LineString(this.getCoordinateSequenceFactory().create([]), this) }
-	  else if (coordinates instanceof Array) { return new LineString(this.getCoordinateSequenceFactory().create(coordinates), this) }
-	  else if (hasInterface(coordinates, CoordinateSequence)) { return new LineString(coordinates, this) }
-	};
-	GeometryFactory.prototype.createMultiLineString = function createMultiLineString () {
-	  if (arguments.length === 0) {
-	    return new MultiLineString(null, this)
-	  } else if (arguments.length === 1) {
-	    var lineStrings = arguments[0];
-	    return new MultiLineString(lineStrings, this)
-	  }
-	};
-	GeometryFactory.prototype.buildGeometry = function buildGeometry (geomList) {
-	  var geomClass = null;
-	  var isHeterogeneous = false;
-	  var hasGeometryCollection = false;
-	  for (var i = geomList.iterator(); i.hasNext();) {
-	    var geom = i.next();
-	    var partClass = geom.getClass();
-	    if (geomClass === null) {
-	      geomClass = partClass;
-	    }
-	    if (partClass !== geomClass) {
-	      isHeterogeneous = true;
-	    }
-	    if (geom.isGeometryCollectionOrDerived()) { hasGeometryCollection = true; }
-	  }
-	  if (geomClass === null) {
-	    return this.createGeometryCollection()
-	  }
-	  if (isHeterogeneous || hasGeometryCollection) {
-	    return this.createGeometryCollection(GeometryFactory.toGeometryArray(geomList))
-	  }
-	  var geom0 = geomList.iterator().next();
-	  var isCollection = geomList.size() > 1;
-	  if (isCollection) {
-	    if (geom0 instanceof Polygon) {
-	      return this.createMultiPolygon(GeometryFactory.toPolygonArray(geomList))
-	    } else if (geom0 instanceof LineString) {
-	      return this.createMultiLineString(GeometryFactory.toLineStringArray(geomList))
-	    } else if (geom0 instanceof Point$1) {
-	      return this.createMultiPoint(GeometryFactory.toPointArray(geomList))
-	    }
-	    Assert.shouldNeverReachHere('Unhandled class: ' + geom0.getClass().getName());
-	  }
-	  return geom0
-	};
-	GeometryFactory.prototype.createMultiPointFromCoords = function createMultiPointFromCoords (coordinates) {
-	  return this.createMultiPoint(coordinates !== null ? this.getCoordinateSequenceFactory().create(coordinates) : null)
-	};
-	GeometryFactory.prototype.createPoint = function createPoint () {
-	  if (arguments.length === 0) {
-	    return this.createPoint(this.getCoordinateSequenceFactory().create([]))
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Coordinate) {
-	      var coordinate = arguments[0];
-	      return this.createPoint(coordinate !== null ? this.getCoordinateSequenceFactory().create([coordinate]) : null)
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordinates = arguments[0];
-	      return new Point$1(coordinates, this)
-	    }
-	  }
-	};
-	GeometryFactory.prototype.getCoordinateSequenceFactory = function getCoordinateSequenceFactory () {
-	  return this._coordinateSequenceFactory
-	};
-	GeometryFactory.prototype.createPolygon = function createPolygon () {
-	  if (arguments.length === 0) {
-	    return new Polygon(null, null, this)
-	  } else if (arguments.length === 1) {
-	    if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordinates = arguments[0];
-	      return this.createPolygon(this.createLinearRing(coordinates))
-	    } else if (arguments[0] instanceof Array) {
-	      var coordinates$1 = arguments[0];
-	      return this.createPolygon(this.createLinearRing(coordinates$1))
-	    } else if (arguments[0] instanceof LinearRing) {
-	      var shell = arguments[0];
-	      return this.createPolygon(shell, null)
-	    }
-	  } else if (arguments.length === 2) {
-	    var shell$1 = arguments[0];
-	    var holes = arguments[1];
-	    return new Polygon(shell$1, holes, this)
-	  }
-	};
-	GeometryFactory.prototype.getSRID = function getSRID () {
-	  return this._SRID
-	};
-	GeometryFactory.prototype.createGeometryCollection = function createGeometryCollection () {
-	  if (arguments.length === 0) {
-	    return new GeometryCollection(null, this)
-	  } else if (arguments.length === 1) {
-	    var geometries = arguments[0];
-	    return new GeometryCollection(geometries, this)
-	  }
-	};
-	GeometryFactory.prototype.createGeometry = function createGeometry (g) {
-	  var editor = new GeometryEditor(this);
-	  return editor.edit(g, {
-	    edit: function () {
-	      if (arguments.length === 2) {
-	        var coordSeq = arguments[0];
-	        // const geometry = arguments[1]
-	        return this._coordinateSequenceFactory.create(coordSeq)
+	  field.isAllowed = function () {
+	    if (entityIDs && entityIDs.length > 1 && uiFields[field.type].supportsMultiselection === false) return false;
+	    if (field.geometry && !entityIDs.every(function (entityID) {
+	      return field.matchGeometry(context.graph().geometry(entityID));
+	    })) return false;
+
+	    if (field.countryCodes || field.notCountryCodes) {
+	      var extent = combinedEntityExtent();
+	      if (!extent) return true;
+	      var center = extent.center();
+	      var countryCode = iso1A2Code(center);
+	      if (!countryCode) return false;
+	      countryCode = countryCode.toLowerCase();
+
+	      if (field.countryCodes && field.countryCodes.indexOf(countryCode) === -1) {
+	        return false;
+	      }
+
+	      if (field.notCountryCodes && field.notCountryCodes.indexOf(countryCode) !== -1) {
+	        return false;
 	      }
 	    }
-	  })
-	};
-	GeometryFactory.prototype.getPrecisionModel = function getPrecisionModel () {
-	  return this._precisionModel
-	};
-	GeometryFactory.prototype.createLinearRing = function createLinearRing () {
-	  if (arguments.length === 0) {
-	    return this.createLinearRing(this.getCoordinateSequenceFactory().create([]))
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      var coordinates = arguments[0];
-	      return this.createLinearRing(coordinates !== null ? this.getCoordinateSequenceFactory().create(coordinates) : null)
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordinates$1 = arguments[0];
-	      return new LinearRing(coordinates$1, this)
-	    }
-	  }
-	};
-	GeometryFactory.prototype.createMultiPolygon = function createMultiPolygon () {
-	  if (arguments.length === 0) {
-	    return new MultiPolygon(null, this)
-	  } else if (arguments.length === 1) {
-	    var polygons = arguments[0];
-	    return new MultiPolygon(polygons, this)
-	  }
-	};
-	GeometryFactory.prototype.createMultiPoint = function createMultiPoint () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    return new MultiPoint(null, this)
-	  } else if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      var point = arguments[0];
-	      return new MultiPoint(point, this)
-	    } else if (arguments[0] instanceof Array) {
-	      var coordinates = arguments[0];
-	      return this.createMultiPoint(coordinates !== null ? this.getCoordinateSequenceFactory().create(coordinates) : null)
-	    } else if (hasInterface(arguments[0], CoordinateSequence)) {
-	      var coordinates$1 = arguments[0];
-	      if (coordinates$1 === null) {
-	        return this.createMultiPoint(new Array(0).fill(null))
-	      }
-	      var points = new Array(coordinates$1.size()).fill(null);
-	      for (var i = 0; i < coordinates$1.size(); i++) {
-	        var ptSeq = this$1.getCoordinateSequenceFactory().create(1, coordinates$1.getDimension());
-	        CoordinateSequences.copy(coordinates$1, i, ptSeq, 0, 1);
-	        points[i] = this$1.createPoint(ptSeq);
-	      }
-	      return this.createMultiPoint(points)
-	    }
-	  }
-	};
-	GeometryFactory.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable]
-	};
-	GeometryFactory.prototype.getClass = function getClass () {
-	  return GeometryFactory
-	};
-	GeometryFactory.toMultiPolygonArray = function toMultiPolygonArray (multiPolygons) {
-	  var multiPolygonArray = new Array(multiPolygons.size()).fill(null);
-	  return multiPolygons.toArray(multiPolygonArray)
-	};
-	GeometryFactory.toGeometryArray = function toGeometryArray (geometries) {
-	  if (geometries === null) { return null }
-	  var geometryArray = new Array(geometries.size()).fill(null);
-	  return geometries.toArray(geometryArray)
-	};
-	GeometryFactory.getDefaultCoordinateSequenceFactory = function getDefaultCoordinateSequenceFactory () {
-	  return CoordinateArraySequenceFactory.instance()
-	};
-	GeometryFactory.toMultiLineStringArray = function toMultiLineStringArray (multiLineStrings) {
-	  var multiLineStringArray = new Array(multiLineStrings.size()).fill(null);
-	  return multiLineStrings.toArray(multiLineStringArray)
-	};
-	GeometryFactory.toLineStringArray = function toLineStringArray (lineStrings) {
-	  var lineStringArray = new Array(lineStrings.size()).fill(null);
-	  return lineStrings.toArray(lineStringArray)
-	};
-	GeometryFactory.toMultiPointArray = function toMultiPointArray (multiPoints) {
-	  var multiPointArray = new Array(multiPoints.size()).fill(null);
-	  return multiPoints.toArray(multiPointArray)
-	};
-	GeometryFactory.toLinearRingArray = function toLinearRingArray (linearRings) {
-	  var linearRingArray = new Array(linearRings.size()).fill(null);
-	  return linearRings.toArray(linearRingArray)
-	};
-	GeometryFactory.toPointArray = function toPointArray (points) {
-	  var pointArray = new Array(points.size()).fill(null);
-	  return points.toArray(pointArray)
-	};
-	GeometryFactory.toPolygonArray = function toPolygonArray (polygons) {
-	  var polygonArray = new Array(polygons.size()).fill(null);
-	  return polygons.toArray(polygonArray)
-	};
-	GeometryFactory.createPointFromInternalCoord = function createPointFromInternalCoord (coord, exemplar) {
-	  exemplar.getPrecisionModel().makePrecise(coord);
-	  return exemplar.getFactory().createPoint(coord)
-	};
-	staticAccessors$2.serialVersionUID.get = function () { return -6820524753094095635 };
 
-	Object.defineProperties( GeometryFactory, staticAccessors$2 );
+	    var prerequisiteTag = field.prerequisiteTag;
+
+	    if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
+	    prerequisiteTag) {
+	      if (!entityIDs.every(function (entityID) {
+	        var entity = context.graph().entity(entityID);
+
+	        if (prerequisiteTag.key) {
+	          var value = entity.tags[prerequisiteTag.key];
+	          if (!value) return false;
+
+	          if (prerequisiteTag.valueNot) {
+	            return prerequisiteTag.valueNot !== value;
+	          }
+
+	          if (prerequisiteTag.value) {
+	            return prerequisiteTag.value === value;
+	          }
+	        } else if (prerequisiteTag.keyNot) {
+	          if (entity.tags[prerequisiteTag.keyNot]) return false;
+	        }
+
+	        return true;
+	      })) return false;
+	    }
 
-	var geometryTypes = ['Point', 'MultiPoint', 'LineString', 'MultiLineString', 'Polygon', 'MultiPolygon'];
+	    return true;
+	  };
 
-	/**
-	 * Class for reading and writing Well-Known Text.Create a new parser for GeoJSON
-	 * NOTE: Adapted from OpenLayers 2.11 implementation.
-	 */
+	  field.focus = function () {
+	    if (field.impl) {
+	      field.impl.focus();
+	    }
+	  };
 
-	/**
-	 * Create a new parser for GeoJSON
-	 *
-	 * @param {GeometryFactory} geometryFactory
-	 * @return An instance of GeoJsonParser.
-	 * @constructor
-	 * @private
-	 */
-	var GeoJSONParser = function GeoJSONParser (geometryFactory) {
-	  this.geometryFactory = geometryFactory || new GeometryFactory();
-	};
-	/**
-	 * Deserialize a GeoJSON object and return the Geometry or Feature(Collection) with JSTS Geometries
-	 *
-	 * @param {}
-	 *        A GeoJSON object.
-	 * @return {} A Geometry instance or object representing a Feature(Collection) with Geometry instances.
-	 * @private
-	 */
-	GeoJSONParser.prototype.read = function read (json) {
-	  var obj;
-	  if (typeof json === 'string') {
-	    obj = JSON.parse(json);
-	  } else {
-	    obj = json;
+	  function combinedEntityExtent() {
+	    return entityIDs && entityIDs.length && entityIDs.reduce(function (extent, entityID) {
+	      var entity = context.graph().entity(entityID);
+	      return extent.extend(entity.extent(context.graph()));
+	    }, geoExtent());
 	  }
 
-	  var type = obj.type;
+	  return utilRebind(field, dispatch$1, 'on');
+	}
 
-	  if (!parse$2[type]) {
-	    throw new Error('Unknown GeoJSON type: ' + obj.type)
-	  }
+	function uiFormFields(context) {
+	  var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
+	  var _fieldsArr = [];
+	  var _lastPlaceholder = '';
+	  var _state = '';
+	  var _klass = '';
+
+	  function formFields(selection) {
+	    var allowedFields = _fieldsArr.filter(function (field) {
+	      return field.isAllowed();
+	    });
 
-	  if (geometryTypes.indexOf(type) !== -1) {
-	    return parse$2[type].apply(this, [obj.coordinates])
-	  } else if (type === 'GeometryCollection') {
-	    return parse$2[type].apply(this, [obj.geometries])
-	  }
+	    var shown = allowedFields.filter(function (field) {
+	      return field.isShown();
+	    });
+	    var notShown = allowedFields.filter(function (field) {
+	      return !field.isShown();
+	    });
+	    var container = selection.selectAll('.form-fields-container').data([0]);
+	    container = container.enter().append('div').attr('class', 'form-fields-container ' + (_klass || '')).merge(container);
+	    var fields = container.selectAll('.wrap-form-field').data(shown, function (d) {
+	      return d.id + (d.entityIDs ? d.entityIDs.join() : '');
+	    });
+	    fields.exit().remove(); // Enter
 
-	  // feature or feature collection
-	  return parse$2[type].apply(this, [obj])
-	};
+	    var enter = fields.enter().append('div').attr('class', function (d) {
+	      return 'wrap-form-field wrap-form-field-' + d.safeid;
+	    }); // Update
 
-	/**
-	 * Serialize a Geometry object into GeoJSON
-	 *
-	 * @param {Geometry}
-	 *        geometry A Geometry or array of Geometries.
-	 * @return {Object} A GeoJSON object represting the input Geometry/Geometries.
-	 * @private
-	 */
-	GeoJSONParser.prototype.write = function write (geometry) {
-	  var type = geometry.getGeometryType();
+	    fields = fields.merge(enter);
+	    fields.order().each(function (d) {
+	      select(this).call(d.render);
+	    });
+	    var titles = [];
+	    var moreFields = notShown.map(function (field) {
+	      var title = field.title();
+	      titles.push(title);
+	      var terms = field.terms();
+	      if (field.key) terms.push(field.key);
+	      if (field.keys) terms = terms.concat(field.keys);
+	      return {
+	        display: field.label(),
+	        value: title,
+	        title: title,
+	        field: field,
+	        terms: terms
+	      };
+	    });
+	    var placeholder = titles.slice(0, 3).join(', ') + (titles.length > 3 ? '…' : '');
+	    var more = selection.selectAll('.more-fields').data(_state === 'hover' || moreFields.length === 0 ? [] : [0]);
+	    more.exit().remove();
+	    var moreEnter = more.enter().append('div').attr('class', 'more-fields').append('label');
+	    moreEnter.append('span').html(_t.html('inspector.add_fields'));
+	    more = moreEnter.merge(more);
+	    var input = more.selectAll('.value').data([0]);
+	    input.exit().remove();
+	    input = input.enter().append('input').attr('class', 'value').attr('type', 'text').attr('placeholder', placeholder).call(utilNoAuto).merge(input);
+	    input.call(utilGetSetValue, '').call(moreCombo.data(moreFields).on('accept', function (d) {
+	      if (!d) return; // user entered something that was not matched
+
+	      var field = d.field;
+	      field.show();
+	      selection.call(formFields); // rerender
+
+	      field.focus();
+	    })); // avoid updating placeholder excessively (triggers style recalc)
+
+	    if (_lastPlaceholder !== placeholder) {
+	      input.attr('placeholder', placeholder);
+	      _lastPlaceholder = placeholder;
+	    }
+	  }
+
+	  formFields.fieldsArr = function (val) {
+	    if (!arguments.length) return _fieldsArr;
+	    _fieldsArr = val || [];
+	    return formFields;
+	  };
 
-	  if (!extract[type]) {
-	    throw new Error('Geometry is not supported')
-	  }
+	  formFields.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return formFields;
+	  };
 
-	  return extract[type].apply(this, [geometry])
-	};
+	  formFields.klass = function (val) {
+	    if (!arguments.length) return _klass;
+	    _klass = val;
+	    return formFields;
+	  };
 
-	var parse$2 = {
-	  /**
-	   * Parse a GeoJSON Feature object
-	   *
-	   * @param {Object}
-	   *          obj Object to parse.
-	   *
-	   * @return {Object} Feature with geometry/bbox converted to JSTS Geometries.
-	   */
-	  Feature: function (obj) {
-	    var feature = {};
+	  return formFields;
+	}
 
-	    // copy features
-	    for (var key in obj) {
-	      feature[key] = obj[key];
-	    }
+	function uiSectionPresetFields(context) {
+	  var section = uiSection('preset-fields', context).label(_t.html('inspector.fields')).disclosureContent(renderDisclosureContent);
+	  var dispatch$1 = dispatch('change', 'revert');
+	  var formFields = uiFormFields(context);
 
-	    // parse geometry
-	    if (obj.geometry) {
-	      var type = obj.geometry.type;
-	      if (!parse$2[type]) {
-	        throw new Error('Unknown GeoJSON type: ' + obj.type)
-	      }
-	      feature.geometry = this.read(obj.geometry);
-	    }
+	  var _state;
 
-	    // bbox
-	    if (obj.bbox) {
-	      feature.bbox = parse$2.bbox.apply(this, [obj.bbox]);
-	    }
+	  var _fieldsArr;
 
-	    return feature
-	  },
+	  var _presets = [];
 
-	  /**
-	   * Parse a GeoJSON FeatureCollection object
-	   *
-	   * @param {Object}
-	   *          obj Object to parse.
-	   *
-	   * @return {Object} FeatureCollection with geometry/bbox converted to JSTS Geometries.
-	   */
-	  FeatureCollection: function (obj) {
-	    var this$1 = this;
+	  var _tags;
 
-	    var featureCollection = {};
+	  var _entityIDs;
+
+	  function renderDisclosureContent(selection) {
+	    if (!_fieldsArr) {
+	      var graph = context.graph();
+	      var geometries = Object.keys(_entityIDs.reduce(function (geoms, entityID) {
+	        geoms[graph.entity(entityID).geometry(graph)] = true;
+	        return geoms;
+	      }, {}));
+	      var presetsManager = _mainPresetIndex;
+	      var allFields = [];
+	      var allMoreFields = [];
+	      var sharedTotalFields;
+
+	      _presets.forEach(function (preset) {
+	        var fields = preset.fields();
+	        var moreFields = preset.moreFields();
+	        allFields = utilArrayUnion(allFields, fields);
+	        allMoreFields = utilArrayUnion(allMoreFields, moreFields);
+
+	        if (!sharedTotalFields) {
+	          sharedTotalFields = utilArrayUnion(fields, moreFields);
+	        } else {
+	          sharedTotalFields = sharedTotalFields.filter(function (field) {
+	            return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
+	          });
+	        }
+	      });
 
-	    if (obj.features) {
-	      featureCollection.features = [];
+	      var sharedFields = allFields.filter(function (field) {
+	        return sharedTotalFields.indexOf(field) !== -1;
+	      });
+	      var sharedMoreFields = allMoreFields.filter(function (field) {
+	        return sharedTotalFields.indexOf(field) !== -1;
+	      });
+	      _fieldsArr = [];
+	      sharedFields.forEach(function (field) {
+	        if (field.matchAllGeometry(geometries)) {
+	          _fieldsArr.push(uiField(context, field, _entityIDs));
+	        }
+	      });
+	      var singularEntity = _entityIDs.length === 1 && graph.hasEntity(_entityIDs[0]);
 
-	      for (var i = 0; i < obj.features.length; ++i) {
-	        featureCollection.features.push(this$1.read(obj.features[i]));
+	      if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
+	        _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
 	      }
-	    }
 
-	    if (obj.bbox) {
-	      featureCollection.bbox = this.parse.bbox.apply(this, [obj.bbox]);
+	      var additionalFields = utilArrayUnion(sharedMoreFields, presetsManager.universal());
+	      additionalFields.sort(function (field1, field2) {
+	        return field1.label().localeCompare(field2.label(), _mainLocalizer.localeCode());
+	      });
+	      additionalFields.forEach(function (field) {
+	        if (sharedFields.indexOf(field) === -1 && field.matchAllGeometry(geometries)) {
+	          _fieldsArr.push(uiField(context, field, _entityIDs, {
+	            show: false
+	          }));
+	        }
+	      });
+
+	      _fieldsArr.forEach(function (field) {
+	        field.on('change', function (t, onInput) {
+	          dispatch$1.call('change', field, _entityIDs, t, onInput);
+	        }).on('revert', function (keys) {
+	          dispatch$1.call('revert', field, keys);
+	        });
+	      });
 	    }
 
-	    return featureCollection
-	  },
+	    _fieldsArr.forEach(function (field) {
+	      field.state(_state).tags(_tags);
+	    });
 
-	  /**
-	   * Convert the ordinates in an array to an array of Coordinates
-	   *
-	   * @param {Array}
-	   *          array Array with {Number}s.
-	   *
-	   * @return {Array} Array with Coordinates.
-	   */
-	  coordinates: function (array) {
-	    var coordinates = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      var sub = array[i];
-	      coordinates.push(new Coordinate(sub[0], sub[1]));
+	    selection.call(formFields.fieldsArr(_fieldsArr).state(_state).klass('grouped-items-area'));
+	    selection.selectAll('.wrap-form-field input').on('keydown', function (d3_event) {
+	      // if user presses enter, and combobox is not active, accept edits..
+	      if (d3_event.keyCode === 13 && // ↩ Return
+	      context.container().select('.combobox').empty()) {
+	        context.enter(modeBrowse(context));
+	      }
+	    });
+	  }
+
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets;
+
+	    if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
+	      _presets = val;
+	      _fieldsArr = null;
 	    }
-	    return coordinates
-	  },
 
-	  /**
-	   * Convert the bbox to a LinearRing
-	   *
-	   * @param {Array}
-	   *          array Array with [xMin, yMin, xMax, yMax].
-	   *
-	   * @return {Array} Array with Coordinates.
-	   */
-	  bbox: function (array) {
-	    return this.geometryFactory.createLinearRing([
-	      new Coordinate(array[0], array[1]),
-	      new Coordinate(array[2], array[1]),
-	      new Coordinate(array[2], array[3]),
-	      new Coordinate(array[0], array[3]),
-	      new Coordinate(array[0], array[1])
-	    ])
-	  },
+	    return section;
+	  };
 
-	  /**
-	   * Convert an Array with ordinates to a Point
-	   *
-	   * @param {Array}
-	   *          array Array with ordinates.
-	   *
-	   * @return {Point} Point.
-	   */
-	  Point: function (array) {
-	    var coordinate = new Coordinate(array[0], array[1]);
-	    return this.geometryFactory.createPoint(coordinate)
-	  },
+	  section.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return section;
+	  };
 
-	  /**
-	   * Convert an Array with coordinates to a MultiPoint
-	   *
-	   * @param {Array}
-	   *          array Array with coordinates.
-	   *
-	   * @return {MultiPoint} MultiPoint.
-	   */
-	  MultiPoint: function (array) {
-	    var this$1 = this;
+	  section.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val; // Don't reset _fieldsArr here.
 
-	    var points = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      points.push(parse$2.Point.apply(this$1, [array[i]]));
+	    return section;
+	  };
+
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+
+	    if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _fieldsArr = null;
 	    }
-	    return this.geometryFactory.createMultiPoint(points)
-	  },
 
-	  /**
-	   * Convert an Array with coordinates to a LineString
-	   *
-	   * @param {Array}
-	   *          array Array with coordinates.
-	   *
-	   * @return {LineString} LineString.
-	   */
-	  LineString: function (array) {
-	    var coordinates = parse$2.coordinates.apply(this, [array]);
-	    return this.geometryFactory.createLineString(coordinates)
-	  },
+	    return section;
+	  };
 
-	  /**
-	   * Convert an Array with coordinates to a MultiLineString
-	   *
-	   * @param {Array}
-	   *          array Array with coordinates.
-	   *
-	   * @return {MultiLineString} MultiLineString.
-	   */
-	  MultiLineString: function (array) {
-	    var this$1 = this;
+	  return utilRebind(section, dispatch$1, 'on');
+	}
 
-	    var lineStrings = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      lineStrings.push(parse$2.LineString.apply(this$1, [array[i]]));
-	    }
-	    return this.geometryFactory.createMultiLineString(lineStrings)
-	  },
+	function uiSectionRawMemberEditor(context) {
+	  var section = uiSection('raw-member-editor', context).shouldDisplay(function () {
+	    if (!_entityIDs || _entityIDs.length !== 1) return false;
+	    var entity = context.hasEntity(_entityIDs[0]);
+	    return entity && entity.type === 'relation';
+	  }).label(function () {
+	    var entity = context.hasEntity(_entityIDs[0]);
+	    if (!entity) return '';
+	    var gt = entity.members.length > _maxMembers ? '>' : '';
+	    var count = gt + entity.members.slice(0, _maxMembers).length;
+	    return _t('inspector.title_count', {
+	      title: _t.html('inspector.members'),
+	      count: count
+	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  var taginfo = services.taginfo;
 
-	  /**
-	   * Convert an Array to a Polygon
-	   *
-	   * @param {Array}
-	   *          array Array with shell and holes.
-	   *
-	   * @return {Polygon} Polygon.
-	   */
-	  Polygon: function (array) {
-	    var this$1 = this;
+	  var _entityIDs;
 
-	    var shellCoordinates = parse$2.coordinates.apply(this, [array[0]]);
-	    var shell = this.geometryFactory.createLinearRing(shellCoordinates);
-	    var holes = [];
-	    for (var i = 1; i < array.length; ++i) {
-	      var hole = array[i];
-	      var coordinates = parse$2.coordinates.apply(this$1, [hole]);
-	      var linearRing = this$1.geometryFactory.createLinearRing(coordinates);
-	      holes.push(linearRing);
-	    }
-	    return this.geometryFactory.createPolygon(shell, holes)
-	  },
+	  var _maxMembers = 1000;
 
-	  /**
-	   * Convert an Array to a MultiPolygon
-	   *
-	   * @param {Array}
-	   *          array Array of arrays with shell and rings.
-	   *
-	   * @return {MultiPolygon} MultiPolygon.
-	   */
-	  MultiPolygon: function (array) {
-	    var this$1 = this;
+	  function downloadMember(d3_event, d) {
+	    d3_event.preventDefault(); // display the loading indicator
 
-	    var polygons = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      var polygon = array[i];
-	      polygons.push(parse$2.Polygon.apply(this$1, [polygon]));
-	    }
-	    return this.geometryFactory.createMultiPolygon(polygons)
-	  },
+	    select(this.parentNode).classed('tag-reference-loading', true);
+	    context.loadEntity(d.id, function () {
+	      section.reRender();
+	    });
+	  }
 
-	  /**
-	   * Convert an Array to a GeometryCollection
-	   *
-	   * @param {Array}
-	   *          array Array of GeoJSON geometries.
-	   *
-	   * @return {GeometryCollection} GeometryCollection.
-	   */
-	  GeometryCollection: function (array) {
-	    var this$1 = this;
+	  function zoomToMember(d3_event, d) {
+	    d3_event.preventDefault();
+	    var entity = context.entity(d.id);
+	    context.map().zoomToEase(entity); // highlight the feature in case it wasn't previously on-screen
 
-	    var geometries = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      var geometry = array[i];
-	      geometries.push(this$1.read(geometry));
-	    }
-	    return this.geometryFactory.createGeometryCollection(geometries)
+	    utilHighlightEntities([d.id], true, context);
 	  }
-	};
 
-	var extract = {
-	  /**
-	   * Convert a Coordinate to an Array
-	   *
-	   * @param {Coordinate}
-	   *          coordinate Coordinate to convert.
-	   *
-	   * @return {Array} Array of ordinates.
-	   */
-	  coordinate: function (coordinate) {
-	    return [coordinate.x, coordinate.y]
-	  },
+	  function selectMember(d3_event, d) {
+	    d3_event.preventDefault(); // remove the hover-highlight styling
 
-	  /**
-	   * Convert a Point to a GeoJSON object
-	   *
-	   * @param {Point}
-	   *          point Point to convert.
-	   *
-	   * @return {Array} Array of 2 ordinates (paired to a coordinate).
-	   */
-	  Point: function (point) {
-	    var array = extract.coordinate.apply(this, [point.getCoordinate()]);
-	    return {
-	      type: 'Point',
-	      coordinates: array
+	    utilHighlightEntities([d.id], false, context);
+	    var entity = context.entity(d.id);
+	    var mapExtent = context.map().extent();
+
+	    if (!entity.intersects(mapExtent, context.graph())) {
+	      // zoom to the entity if its extent is not visible now
+	      context.map().zoomToEase(entity);
 	    }
-	  },
 
-	  /**
-	   * Convert a MultiPoint to a GeoJSON object
-	   *
-	   * @param {MultiPoint}
-	   *          multipoint MultiPoint to convert.
-	   *
-	   * @return {Array} Array of coordinates.
-	   */
-	  MultiPoint: function (multipoint) {
-	    var this$1 = this;
+	    context.enter(modeSelect(context, [d.id]));
+	  }
 
-	    var array = [];
-	    for (var i = 0; i < multipoint._geometries.length; ++i) {
-	      var point = multipoint._geometries[i];
-	      var geoJson = extract.Point.apply(this$1, [point]);
-	      array.push(geoJson.coordinates);
-	    }
-	    return {
-	      type: 'MultiPoint',
-	      coordinates: array
+	  function changeRole(d3_event, d) {
+	    var oldRole = d.role;
+	    var newRole = context.cleanRelationRole(select(this).property('value'));
+
+	    if (oldRole !== newRole) {
+	      var member = {
+	        id: d.id,
+	        type: d.type,
+	        role: newRole
+	      };
+	      context.perform(actionChangeMember(d.relation.id, member, d.index), _t('operations.change_role.annotation', {
+	        n: 1
+	      }));
+	      context.validator().validate();
 	    }
-	  },
+	  }
 
-	  /**
-	   * Convert a LineString to a GeoJSON object
-	   *
-	   * @param {LineString}
-	   *          linestring LineString to convert.
-	   *
-	   * @return {Array} Array of coordinates.
-	   */
-	  LineString: function (linestring) {
-	    var this$1 = this;
+	  function deleteMember(d3_event, d) {
+	    // remove the hover-highlight styling
+	    utilHighlightEntities([d.id], false, context);
+	    context.perform(actionDeleteMember(d.relation.id, d.index), _t('operations.delete_member.annotation', {
+	      n: 1
+	    }));
 
-	    var array = [];
-	    var coordinates = linestring.getCoordinates();
-	    for (var i = 0; i < coordinates.length; ++i) {
-	      var coordinate = coordinates[i];
-	      array.push(extract.coordinate.apply(this$1, [coordinate]));
-	    }
-	    return {
-	      type: 'LineString',
-	      coordinates: array
-	    }
-	  },
+	    if (!context.hasEntity(d.relation.id)) {
+	      // Removing the last member will also delete the relation.
+	      // If this happens we need to exit the selection mode
+	      context.enter(modeBrowse(context));
+	    } else {
+	      // Changing the mode also runs `validate`, but otherwise we need to
+	      // rerun it manually
+	      context.validator().validate();
+	    }
+	  }
+
+	  function renderDisclosureContent(selection) {
+	    var entityID = _entityIDs[0];
+	    var memberships = [];
+	    var entity = context.entity(entityID);
+	    entity.members.slice(0, _maxMembers).forEach(function (member, index) {
+	      memberships.push({
+	        index: index,
+	        id: member.id,
+	        type: member.type,
+	        role: member.role,
+	        relation: entity,
+	        member: context.hasEntity(member.id),
+	        domId: utilUniqueDomId(entityID + '-member-' + index)
+	      });
+	    });
+	    var list = selection.selectAll('.member-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'member-list').merge(list);
+	    var items = list.selectAll('li').data(memberships, function (d) {
+	      return osmEntity.key(d.relation) + ',' + d.index + ',' + (d.member ? osmEntity.key(d.member) : 'incomplete');
+	    });
+	    items.exit().each(unbind).remove();
+	    var itemsEnter = items.enter().append('li').attr('class', 'member-row form-field').classed('member-incomplete', function (d) {
+	      return !d.member;
+	    });
+	    itemsEnter.each(function (d) {
+	      var item = select(this);
+	      var label = item.append('label').attr('class', 'field-label').attr('for', d.domId);
+
+	      if (d.member) {
+	        // highlight the member feature in the map while hovering on the list item
+	        item.on('mouseover', function () {
+	          utilHighlightEntities([d.id], true, context);
+	        }).on('mouseout', function () {
+	          utilHighlightEntities([d.id], false, context);
+	        });
+	        var labelLink = label.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectMember);
+	        labelLink.append('span').attr('class', 'member-entity-type').html(function (d) {
+	          var matched = _mainPresetIndex.match(d.member, context.graph());
+	          return matched && matched.name() || utilDisplayType(d.member.id);
+	        });
+	        labelLink.append('span').attr('class', 'member-entity-name').html(function (d) {
+	          return utilDisplayName(d.member);
+	        });
+	        label.append('button').attr('title', _t('icons.remove')).attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete'));
+	        label.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToMember);
+	      } else {
+	        var labelText = label.append('span').attr('class', 'label-text');
+	        labelText.append('span').attr('class', 'member-entity-type').html(_t.html('inspector.' + d.type, {
+	          id: d.id
+	        }));
+	        labelText.append('span').attr('class', 'member-entity-name').html(_t.html('inspector.incomplete', {
+	          id: d.id
+	        }));
+	        label.append('button').attr('class', 'member-download').attr('title', _t('icons.download')).call(svgIcon('#iD-icon-load')).on('click', downloadMember);
+	      }
+	    });
+	    var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+	    wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
+	      return d.domId;
+	    }).property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto);
+
+	    if (taginfo) {
+	      wrapEnter.each(bindTypeahead);
+	    } // update
+
+
+	    items = items.merge(itemsEnter).order();
+	    items.select('input.member-role').property('value', function (d) {
+	      return d.role;
+	    }).on('blur', changeRole).on('change', changeRole);
+	    items.select('button.member-delete').on('click', deleteMember);
+	    var dragOrigin, targetIndex;
+	    items.call(d3_drag().on('start', function (d3_event) {
+	      dragOrigin = {
+	        x: d3_event.x,
+	        y: d3_event.y
+	      };
+	      targetIndex = null;
+	    }).on('drag', function (d3_event) {
+	      var x = d3_event.x - dragOrigin.x,
+	          y = d3_event.y - dragOrigin.y;
+	      if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
+	      Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
+	      var index = items.nodes().indexOf(this);
+	      select(this).classed('dragging', true);
+	      targetIndex = null;
+	      selection.selectAll('li.member-row').style('transform', function (d2, index2) {
+	        var node = select(this).node();
+
+	        if (index === index2) {
+	          return 'translate(' + x + 'px, ' + y + 'px)';
+	        } else if (index2 > index && d3_event.y > node.offsetTop) {
+	          if (targetIndex === null || index2 > targetIndex) {
+	            targetIndex = index2;
+	          }
 
-	  /**
-	   * Convert a MultiLineString to a GeoJSON object
-	   *
-	   * @param {MultiLineString}
-	   *          multilinestring MultiLineString to convert.
-	   *
-	   * @return {Array} Array of Array of coordinates.
-	   */
-	  MultiLineString: function (multilinestring) {
-	    var this$1 = this;
+	          return 'translateY(-100%)';
+	        } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+	          if (targetIndex === null || index2 < targetIndex) {
+	            targetIndex = index2;
+	          }
 
-	    var array = [];
-	    for (var i = 0; i < multilinestring._geometries.length; ++i) {
-	      var linestring = multilinestring._geometries[i];
-	      var geoJson = extract.LineString.apply(this$1, [linestring]);
-	      array.push(geoJson.coordinates);
-	    }
-	    return {
-	      type: 'MultiLineString',
-	      coordinates: array
-	    }
-	  },
+	          return 'translateY(100%)';
+	        }
 
-	  /**
-	   * Convert a Polygon to a GeoJSON object
-	   *
-	   * @param {Polygon}
-	   *          polygon Polygon to convert.
-	   *
-	   * @return {Array} Array with shell, holes.
-	   */
-	  Polygon: function (polygon) {
-	    var this$1 = this;
+	        return null;
+	      });
+	    }).on('end', function (d3_event, d) {
+	      if (!select(this).classed('dragging')) return;
+	      var index = items.nodes().indexOf(this);
+	      select(this).classed('dragging', false);
+	      selection.selectAll('li.member-row').style('transform', null);
+
+	      if (targetIndex !== null) {
+	        // dragged to a new position, reorder
+	        context.perform(actionMoveMember(d.relation.id, index, targetIndex), _t('operations.reorder_members.annotation'));
+	        context.validator().validate();
+	      }
+	    }));
 
-	    var array = [];
-	    var shellGeoJson = extract.LineString.apply(this, [polygon._shell]);
-	    array.push(shellGeoJson.coordinates);
-	    for (var i = 0; i < polygon._holes.length; ++i) {
-	      var hole = polygon._holes[i];
-	      var holeGeoJson = extract.LineString.apply(this$1, [hole]);
-	      array.push(holeGeoJson.coordinates);
-	    }
-	    return {
-	      type: 'Polygon',
-	      coordinates: array
-	    }
-	  },
+	    function bindTypeahead(d) {
+	      var row = select(this);
+	      var role = row.selectAll('input.member-role');
+	      var origValue = role.property('value');
 
-	  /**
-	   * Convert a MultiPolygon to a GeoJSON object
-	   *
-	   * @param {MultiPolygon}
-	   *          multipolygon MultiPolygon to convert.
-	   *
-	   * @return {Array} Array of polygons.
-	   */
-	  MultiPolygon: function (multipolygon) {
-	    var this$1 = this;
+	      function sort(value, data) {
+	        var sameletter = [];
+	        var other = [];
 
-	    var array = [];
-	    for (var i = 0; i < multipolygon._geometries.length; ++i) {
-	      var polygon = multipolygon._geometries[i];
-	      var geoJson = extract.Polygon.apply(this$1, [polygon]);
-	      array.push(geoJson.coordinates);
-	    }
-	    return {
-	      type: 'MultiPolygon',
-	      coordinates: array
-	    }
-	  },
+	        for (var i = 0; i < data.length; i++) {
+	          if (data[i].value.substring(0, value.length) === value) {
+	            sameletter.push(data[i]);
+	          } else {
+	            other.push(data[i]);
+	          }
+	        }
 
-	  /**
-	   * Convert a GeometryCollection to a GeoJSON object
-	   *
-	   * @param {GeometryCollection}
-	   *          collection GeometryCollection to convert.
-	   *
-	   * @return {Array} Array of geometries.
-	   */
-	  GeometryCollection: function (collection) {
-	    var this$1 = this;
+	        return sameletter.concat(other);
+	      }
 
-	    var array = [];
-	    for (var i = 0; i < collection._geometries.length; ++i) {
-	      var geometry = collection._geometries[i];
-	      var type = geometry.getGeometryType();
-	      array.push(extract[type].apply(this$1, [geometry]));
+	      role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
+	        // The `geometry` param is used in the `taginfo.js` interface for
+	        // filtering results, as a key into the `tag_members_fractions`
+	        // object.  If we don't know the geometry because the member is
+	        // not yet downloaded, it's ok to guess based on type.
+	        var geometry;
+
+	        if (d.member) {
+	          geometry = context.graph().geometry(d.member.id);
+	        } else if (d.type === 'relation') {
+	          geometry = 'relation';
+	        } else if (d.type === 'way') {
+	          geometry = 'line';
+	        } else {
+	          geometry = 'point';
+	        }
+
+	        var rtype = entity.tags.type;
+	        taginfo.roles({
+	          debounce: true,
+	          rtype: rtype || '',
+	          geometry: geometry,
+	          query: role
+	        }, function (err, data) {
+	          if (!err) callback(sort(role, data));
+	        });
+	      }).on('cancel', function () {
+	        role.property('value', origValue);
+	      }));
 	    }
-	    return {
-	      type: 'GeometryCollection',
-	      geometries: array
+
+	    function unbind() {
+	      var row = select(this);
+	      row.selectAll('input.member-role').call(uiCombobox.off, context);
 	    }
 	  }
-	};
 
-	/**
-	 * Converts a geometry in GeoJSON to a {@link Geometry}.
-	 */
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return section;
+	  };
 
-	/**
-	 * A <code>GeoJSONReader</code> is parameterized by a <code>GeometryFactory</code>,
-	 * to allow it to create <code>Geometry</code> objects of the appropriate
-	 * implementation. In particular, the <code>GeometryFactory</code> determines
-	 * the <code>PrecisionModel</code> and <code>SRID</code> that is used.
-	 *
-	 * @param {GeometryFactory} geometryFactory
-	 * @constructor
-	 */
-	var GeoJSONReader = function GeoJSONReader (geometryFactory) {
-	  this.geometryFactory = geometryFactory || new GeometryFactory();
-	  this.precisionModel = this.geometryFactory.getPrecisionModel();
-	  this.parser = new GeoJSONParser(this.geometryFactory);
-	};
-	/**
-	 * Reads a GeoJSON representation of a {@link Geometry}
-	 *
-	 * Will also parse GeoJSON Features/FeatureCollections as custom objects.
-	 *
-	 * @param {Object|String} geoJson a GeoJSON Object or String.
-	 * @return {Geometry|Object} a <code>Geometry or Feature/FeatureCollection representation.</code>
-	 * @memberof GeoJSONReader
-	 */
-	GeoJSONReader.prototype.read = function read (geoJson) {
-	  var geometry = this.parser.read(geoJson);
+	  return section;
+	}
 
-	  if (this.precisionModel.getType() === PrecisionModel.FIXED) {
-	    this.reducePrecision(geometry);
-	  }
+	function actionDeleteMembers(relationId, memberIndexes) {
+	  return function (graph) {
+	    // Remove the members in descending order so removals won't shift what members
+	    // are at the remaining indexes
+	    memberIndexes.sort(function (a, b) {
+	      return b - a;
+	    });
 
-	  return geometry
-	};
+	    for (var i in memberIndexes) {
+	      graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
+	    }
 
-	// NOTE: this is a hack
-	GeoJSONReader.prototype.reducePrecision = function reducePrecision (geometry) {
-	    var this$1 = this;
+	    return graph;
+	  };
+	}
 
-	  var i, len;
+	function uiSectionRawMembershipEditor(context) {
+	  var section = uiSection('raw-membership-editor', context).shouldDisplay(function () {
+	    return _entityIDs && _entityIDs.length;
+	  }).label(function () {
+	    var parents = getSharedParentRelations();
+	    var gt = parents.length > _maxMemberships ? '>' : '';
+	    var count = gt + parents.slice(0, _maxMemberships).length;
+	    return _t('inspector.title_count', {
+	      title: _t.html('inspector.relations'),
+	      count: count
+	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  var taginfo = services.taginfo;
+	  var nearbyCombo = uiCombobox(context, 'parent-relation').minItems(1).fetcher(fetchNearbyRelations).itemsMouseEnter(function (d) {
+	    if (d.relation) utilHighlightEntities([d.relation.id], true, context);
+	  }).itemsMouseLeave(function (d) {
+	    if (d.relation) utilHighlightEntities([d.relation.id], false, context);
+	  });
+	  var _inChange = false;
+	  var _entityIDs = [];
 
-	  if (geometry.coordinate) {
-	    this.precisionModel.makePrecise(geometry.coordinate);
-	  } else if (geometry.points) {
-	    for (i = 0, len = geometry.points.length; i < len; i++) {
-	      this$1.precisionModel.makePrecise(geometry.points[i]);
-	    }
-	  } else if (geometry.geometries) {
-	    for (i = 0, len = geometry.geometries.length; i < len; i++) {
-	      this$1.reducePrecision(geometry.geometries[i]);
-	    }
-	  }
-	};
+	  var _showBlank;
 
-	/**
-	 * @module GeoJSONWriter
-	 */
+	  var _maxMemberships = 1000;
 
-	/**
-	 * Writes the GeoJSON representation of a {@link Geometry}. The
-	 * The GeoJSON format is defined <A
-	 * HREF="http://geojson.org/geojson-spec.html">here</A>.
-	 */
+	  function getSharedParentRelations() {
+	    var parents = [];
 
-	/**
-	 * The <code>GeoJSONWriter</code> outputs coordinates rounded to the precision
-	 * model. Only the maximum number of decimal places necessary to represent the
-	 * ordinates to the required precision will be output.
-	 *
-	 * @param {GeometryFactory} geometryFactory
-	 * @constructor
-	 */
-	var GeoJSONWriter = function GeoJSONWriter () {
-	  this.parser = new GeoJSONParser(this.geometryFactory);
-	};
-	/**
-	 * Converts a <code>Geometry</code> to its GeoJSON representation.
-	 *
-	 * @param {Geometry}
-	 *        geometry a <code>Geometry</code> to process.
-	 * @return {Object} The GeoJSON representation of the Geometry.
-	 * @memberof GeoJSONWriter
-	 */
-	GeoJSONWriter.prototype.write = function write (geometry) {
-	  return this.parser.write(geometry)
-	};
+	    for (var i = 0; i < _entityIDs.length; i++) {
+	      var entity = context.graph().hasEntity(_entityIDs[i]);
+	      if (!entity) continue;
 
-	/* eslint-disable no-undef */
+	      if (i === 0) {
+	        parents = context.graph().parentRelations(entity);
+	      } else {
+	        parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
+	      }
 
-	// io
+	      if (!parents.length) break;
+	    }
 
-	var Position = function Position () {};
+	    return parents;
+	  }
 
-	var staticAccessors$20 = { ON: { configurable: true },LEFT: { configurable: true },RIGHT: { configurable: true } };
+	  function getMemberships() {
+	    var memberships = [];
+	    var relations = getSharedParentRelations().slice(0, _maxMemberships);
+	    var isMultiselect = _entityIDs.length > 1;
+	    var i, relation, membership, index, member, indexedMember;
 
-	Position.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Position.prototype.getClass = function getClass () {
-	  return Position
-	};
-	Position.opposite = function opposite (position) {
-	  if (position === Position.LEFT) { return Position.RIGHT }
-	  if (position === Position.RIGHT) { return Position.LEFT }
-	  return position
-	};
-	staticAccessors$20.ON.get = function () { return 0 };
-	staticAccessors$20.LEFT.get = function () { return 1 };
-	staticAccessors$20.RIGHT.get = function () { return 2 };
+	    for (i = 0; i < relations.length; i++) {
+	      relation = relations[i];
+	      membership = {
+	        relation: relation,
+	        members: [],
+	        hash: osmEntity.key(relation)
+	      };
 
-	Object.defineProperties( Position, staticAccessors$20 );
+	      for (index = 0; index < relation.members.length; index++) {
+	        member = relation.members[index];
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function EmptyStackException (message) {
-	  this.message = message || '';
-	}
-	EmptyStackException.prototype = new Error();
+	        if (_entityIDs.indexOf(member.id) !== -1) {
+	          indexedMember = Object.assign({}, member, {
+	            index: index
+	          });
+	          membership.members.push(indexedMember);
+	          membership.hash += ',' + index.toString();
+
+	          if (!isMultiselect) {
+	            // For single selections, list one entry per membership per relation.
+	            // For multiselections, list one entry per relation.
+	            memberships.push(membership);
+	            membership = {
+	              relation: relation,
+	              members: [],
+	              hash: osmEntity.key(relation)
+	            };
+	          }
+	        }
+	      }
 
-	/**
-	 * @type {string}
-	 */
-	EmptyStackException.prototype.name = 'EmptyStackException';
+	      if (membership.members.length) memberships.push(membership);
+	    }
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Stack.html
-	 *
-	 * @extends {List}
-	 * @constructor
-	 * @private
-	 */
-	function Stack () {
-	  /**
-	   * @type {Array}
-	   * @private
-	   */
-	  this.array_ = [];
-	}
-	Stack.prototype = new List();
+	    memberships.forEach(function (membership) {
+	      membership.domId = utilUniqueDomId('membership-' + membership.relation.id);
+	      var roles = [];
+	      membership.members.forEach(function (member) {
+	        if (roles.indexOf(member.role) === -1) roles.push(member.role);
+	      });
+	      membership.role = roles.length === 1 ? roles[0] : roles;
+	    });
+	    return memberships;
+	  }
 
-	/**
-	 * @override
-	 */
-	Stack.prototype.add = function (e) {
-	  this.array_.push(e);
-	  return true
-	};
+	  function selectRelation(d3_event, d) {
+	    d3_event.preventDefault(); // remove the hover-highlight styling
 
-	/**
-	 * @override
-	 */
-	Stack.prototype.get = function (index) {
-	  if (index < 0 || index >= this.size()) {
-	    throw new Error()
+	    utilHighlightEntities([d.relation.id], false, context);
+	    context.enter(modeSelect(context, [d.relation.id]));
 	  }
 
-	  return this.array_[index]
-	};
-
-	/**
-	 * Pushes an item onto the top of this stack.
-	 * @param {Object} e
-	 * @return {Object}
-	 */
-	Stack.prototype.push = function (e) {
-	  this.array_.push(e);
-	  return e
-	};
+	  function zoomToRelation(d3_event, d) {
+	    d3_event.preventDefault();
+	    var entity = context.entity(d.relation.id);
+	    context.map().zoomToEase(entity); // highlight the relation in case it wasn't previously on-screen
 
-	/**
-	 * Pushes an item onto the top of this stack.
-	 * @param {Object} e
-	 * @return {Object}
-	 */
-	Stack.prototype.pop = function (e) {
-	  if (this.array_.length === 0) {
-	    throw new EmptyStackException()
+	    utilHighlightEntities([d.relation.id], true, context);
 	  }
 
-	  return this.array_.pop()
-	};
+	  function changeRole(d3_event, d) {
+	    if (d === 0) return; // called on newrow (shouldn't happen)
 
-	/**
-	 * Looks at the object at the top of this stack without removing it from the
-	 * stack.
-	 * @return {Object}
-	 */
-	Stack.prototype.peek = function () {
-	  if (this.array_.length === 0) {
-	    throw new EmptyStackException()
-	  }
+	    if (_inChange) return; // avoid accidental recursive call #5731
 
-	  return this.array_[this.array_.length - 1]
-	};
+	    var newRole = context.cleanRelationRole(select(this).property('value'));
+	    if (!newRole.trim() && typeof d.role !== 'string') return;
+	    var membersToUpdate = d.members.filter(function (member) {
+	      return member.role !== newRole;
+	    });
 
-	/**
-	 * Tests if this stack is empty.
-	 * @return {boolean} true if and only if this stack contains no items; false
-	 *         otherwise.
-	 */
-	Stack.prototype.empty = function () {
-	  if (this.array_.length === 0) {
-	    return true
-	  } else {
-	    return false
+	    if (membersToUpdate.length) {
+	      _inChange = true;
+	      context.perform(function actionChangeMemberRoles(graph) {
+	        membersToUpdate.forEach(function (member) {
+	          var newMember = Object.assign({}, member, {
+	            role: newRole
+	          });
+	          delete newMember.index;
+	          graph = actionChangeMember(d.relation.id, newMember, member.index)(graph);
+	        });
+	        return graph;
+	      }, _t('operations.change_role.annotation', {
+	        n: membersToUpdate.length
+	      }));
+	      context.validator().validate();
+	    }
+
+	    _inChange = false;
 	  }
-	};
 
-	/**
-	 * @return {boolean}
-	 */
-	Stack.prototype.isEmpty = function () {
-	  return this.empty()
-	};
+	  function addMembership(d, role) {
+	    this.blur(); // avoid keeping focus on the button
 
-	/**
-	 * Returns the 1-based position where an object is on this stack. If the object
-	 * o occurs as an item in this stack, this method returns the distance from the
-	 * top of the stack of the occurrence nearest the top of the stack; the topmost
-	 * item on the stack is considered to be at distance 1. The equals method is
-	 * used to compare o to the items in this stack.
-	 *
-	 * NOTE: does not currently actually use equals. (=== is used)
-	 *
-	 * @param {Object} o
-	 * @return {number} the 1-based position from the top of the stack where the
-	 *         object is located; the return value -1 indicates that the object is
-	 *         not on the stack.
-	 */
-	Stack.prototype.search = function (o) {
-	  return this.array_.indexOf(o)
-	};
+	    _showBlank = false;
 
-	/**
-	 * @return {number}
-	 * @export
-	 */
-	Stack.prototype.size = function () {
-	  return this.array_.length
-	};
+	    function actionAddMembers(relationId, ids, role) {
+	      return function (graph) {
+	        for (var i in ids) {
+	          var member = {
+	            id: ids[i],
+	            type: graph.entity(ids[i]).type,
+	            role: role
+	          };
+	          graph = actionAddMember(relationId, member)(graph);
+	        }
 
-	/**
-	 * @return {Array}
-	 */
-	Stack.prototype.toArray = function () {
-	  var this$1 = this;
+	        return graph;
+	      };
+	    }
 
-	  var array = [];
+	    if (d.relation) {
+	      context.perform(actionAddMembers(d.relation.id, _entityIDs, role), _t('operations.add_member.annotation', {
+	        n: _entityIDs.length
+	      }));
+	      context.validator().validate();
+	    } else {
+	      var relation = osmRelation();
+	      context.perform(actionAddEntity(relation), actionAddMembers(relation.id, _entityIDs, role), _t('operations.add.annotation.relation')); // changing the mode also runs `validate`
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    array.push(this$1.array_[i]);
+	      context.enter(modeSelect(context, [relation.id]).newFeature(true));
+	    }
 	  }
 
-	  return array
-	};
+	  function deleteMembership(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button
 
-	var RightmostEdgeFinder = function RightmostEdgeFinder () {
-	  this._minIndex = -1;
-	  this._minCoord = null;
-	  this._minDe = null;
-	  this._orientedDe = null;
-	};
-	RightmostEdgeFinder.prototype.getCoordinate = function getCoordinate () {
-	  return this._minCoord
-	};
-	RightmostEdgeFinder.prototype.getRightmostSide = function getRightmostSide (de, index) {
-	  var side = this.getRightmostSideOfSegment(de, index);
-	  if (side < 0) { side = this.getRightmostSideOfSegment(de, index - 1); }
-	  if (side < 0) {
-	    this._minCoord = null;
-	    this.checkForRightmostCoordinate(de);
-	  }
-	  return side
-	};
-	RightmostEdgeFinder.prototype.findRightmostEdgeAtVertex = function findRightmostEdgeAtVertex () {
-	  var pts = this._minDe.getEdge().getCoordinates();
-	  Assert.isTrue(this._minIndex > 0 && this._minIndex < pts.length, 'rightmost point expected to be interior vertex of edge');
-	  var pPrev = pts[this._minIndex - 1];
-	  var pNext = pts[this._minIndex + 1];
-	  var orientation = CGAlgorithms.computeOrientation(this._minCoord, pNext, pPrev);
-	  var usePrev = false;
-	  if (pPrev.y < this._minCoord.y && pNext.y < this._minCoord.y && orientation === CGAlgorithms.COUNTERCLOCKWISE) {
-	    usePrev = true;
-	  } else if (pPrev.y > this._minCoord.y && pNext.y > this._minCoord.y && orientation === CGAlgorithms.CLOCKWISE) {
-	    usePrev = true;
-	  }
-	  if (usePrev) {
-	    this._minIndex = this._minIndex - 1;
+	    if (d === 0) return; // called on newrow (shouldn't happen)
+	    // remove the hover-highlight styling
+
+	    utilHighlightEntities([d.relation.id], false, context);
+	    var indexes = d.members.map(function (member) {
+	      return member.index;
+	    });
+	    context.perform(actionDeleteMembers(d.relation.id, indexes), _t('operations.delete_member.annotation', {
+	      n: _entityIDs.length
+	    }));
+	    context.validator().validate();
 	  }
-	};
-	RightmostEdgeFinder.prototype.getRightmostSideOfSegment = function getRightmostSideOfSegment (de, i) {
-	  var e = de.getEdge();
-	  var coord = e.getCoordinates();
-	  if (i < 0 || i + 1 >= coord.length) { return -1 }
-	  if (coord[i].y === coord[i + 1].y) { return -1 }
-	  var pos = Position.LEFT;
-	  if (coord[i].y < coord[i + 1].y) { pos = Position.RIGHT; }
-	  return pos
-	};
-	RightmostEdgeFinder.prototype.getEdge = function getEdge () {
-	  return this._orientedDe
-	};
-	RightmostEdgeFinder.prototype.checkForRightmostCoordinate = function checkForRightmostCoordinate (de) {
-	    var this$1 = this;
 
-	  var coord = de.getEdge().getCoordinates();
-	  for (var i = 0; i < coord.length - 1; i++) {
-	    if (this$1._minCoord === null || coord[i].x > this$1._minCoord.x) {
-	      this$1._minDe = de;
-	      this$1._minIndex = i;
-	      this$1._minCoord = coord[i];
+	  function fetchNearbyRelations(q, callback) {
+	    var newRelation = {
+	      relation: null,
+	      value: _t('inspector.new_relation'),
+	      display: _t.html('inspector.new_relation')
+	    };
+	    var entityID = _entityIDs[0];
+	    var result = [];
+	    var graph = context.graph();
+
+	    function baseDisplayLabel(entity) {
+	      var matched = _mainPresetIndex.match(entity, graph);
+	      var presetName = matched && matched.name() || _t('inspector.relation');
+	      var entityName = utilDisplayName(entity) || '';
+	      return presetName + ' ' + entityName;
 	    }
-	  }
-	};
-	RightmostEdgeFinder.prototype.findRightmostEdgeAtNode = function findRightmostEdgeAtNode () {
-	  var node = this._minDe.getNode();
-	  var star = node.getEdges();
-	  this._minDe = star.getRightmostEdge();
-	  if (!this._minDe.isForward()) {
-	    this._minDe = this._minDe.getSym();
-	    this._minIndex = this._minDe.getEdge().getCoordinates().length - 1;
-	  }
-	};
-	RightmostEdgeFinder.prototype.findEdge = function findEdge (dirEdgeList) {
-	    var this$1 = this;
 
-	  for (var i = dirEdgeList.iterator(); i.hasNext();) {
-	    var de = i.next();
-	    if (!de.isForward()) { continue }
-	    this$1.checkForRightmostCoordinate(de);
-	  }
-	  Assert.isTrue(this._minIndex !== 0 || this._minCoord.equals(this._minDe.getCoordinate()), 'inconsistency in rightmost processing');
-	  if (this._minIndex === 0) {
-	    this.findRightmostEdgeAtNode();
-	  } else {
-	    this.findRightmostEdgeAtVertex();
-	  }
-	  this._orientedDe = this._minDe;
-	  var rightmostSide = this.getRightmostSide(this._minDe, this._minIndex);
-	  if (rightmostSide === Position.LEFT) {
-	    this._orientedDe = this._minDe.getSym();
-	  }
-	};
-	RightmostEdgeFinder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	RightmostEdgeFinder.prototype.getClass = function getClass () {
-	  return RightmostEdgeFinder
-	};
+	    var explicitRelation = q && context.hasEntity(q.toLowerCase());
+
+	    if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
+	      // loaded relation is specified explicitly, only show that
+	      result.push({
+	        relation: explicitRelation,
+	        value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
+	      });
+	    } else {
+	      context.history().intersects(context.map().extent()).forEach(function (entity) {
+	        if (entity.type !== 'relation' || entity.id === entityID) return;
+	        var value = baseDisplayLabel(entity);
+	        if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) return;
+	        result.push({
+	          relation: entity,
+	          value: value
+	        });
+	      });
+	      result.sort(function (a, b) {
+	        return osmRelation.creationOrder(a.relation, b.relation);
+	      }); // Dedupe identical names by appending relation id - see #2891
+
+	      var dupeGroups = Object.values(utilArrayGroupBy(result, 'value')).filter(function (v) {
+	        return v.length > 1;
+	      });
+	      dupeGroups.forEach(function (group) {
+	        group.forEach(function (obj) {
+	          obj.value += ' ' + obj.relation.id;
+	        });
+	      });
+	    }
 
-	var TopologyException = (function (RuntimeException$$1) {
-	  function TopologyException (msg, pt) {
-	    RuntimeException$$1.call(this, TopologyException.msgWithCoord(msg, pt));
-	    this.pt = pt ? new Coordinate(pt) : null;
-	    this.name = 'TopologyException';
+	    result.forEach(function (obj) {
+	      obj.title = obj.value;
+	    });
+	    result.unshift(newRelation);
+	    callback(result);
 	  }
 
-	  if ( RuntimeException$$1 ) { TopologyException.__proto__ = RuntimeException$$1; }
-	  TopologyException.prototype = Object.create( RuntimeException$$1 && RuntimeException$$1.prototype );
-	  TopologyException.prototype.constructor = TopologyException;
-	  TopologyException.prototype.getCoordinate = function getCoordinate () {
-	    return this.pt
-	  };
-	  TopologyException.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  TopologyException.prototype.getClass = function getClass () {
-	    return TopologyException
-	  };
-	  TopologyException.msgWithCoord = function msgWithCoord (msg, pt) {
-	    if (!pt) { return msg + ' [ ' + pt + ' ]' }
-	    return msg
-	  };
+	  function renderDisclosureContent(selection) {
+	    var memberships = getMemberships();
+	    var list = selection.selectAll('.member-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'member-list').merge(list);
+	    var items = list.selectAll('li.member-row-normal').data(memberships, function (d) {
+	      return d.hash;
+	    });
+	    items.exit().each(unbind).remove(); // Enter
 
-	  return TopologyException;
-	}(RuntimeException));
+	    var itemsEnter = items.enter().append('li').attr('class', 'member-row member-row-normal form-field'); // highlight the relation in the map while hovering on the list item
 
-	var LinkedList = function LinkedList () {
-	  this.array_ = [];
-	};
-	LinkedList.prototype.addLast = function addLast (e) {
-	  this.array_.push(e);
-	};
-	LinkedList.prototype.removeFirst = function removeFirst () {
-	  return this.array_.shift()
-	};
-	LinkedList.prototype.isEmpty = function isEmpty () {
-	  return this.array_.length === 0
-	};
+	    itemsEnter.on('mouseover', function (d3_event, d) {
+	      utilHighlightEntities([d.relation.id], true, context);
+	    }).on('mouseout', function (d3_event, d) {
+	      utilHighlightEntities([d.relation.id], false, context);
+	    });
+	    var labelEnter = itemsEnter.append('label').attr('class', 'field-label').attr('for', function (d) {
+	      return d.domId;
+	    });
+	    var labelLink = labelEnter.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectRelation);
+	    labelLink.append('span').attr('class', 'member-entity-type').html(function (d) {
+	      var matched = _mainPresetIndex.match(d.relation, context.graph());
+	      return matched && matched.name() || _t('inspector.relation');
+	    });
+	    labelLink.append('span').attr('class', 'member-entity-name').html(function (d) {
+	      return utilDisplayName(d.relation);
+	    });
+	    labelEnter.append('button').attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete')).on('click', deleteMembership);
+	    labelEnter.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToRelation);
+	    var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+	    wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
+	      return d.domId;
+	    }).property('type', 'text').property('value', function (d) {
+	      return typeof d.role === 'string' ? d.role : '';
+	    }).attr('title', function (d) {
+	      return Array.isArray(d.role) ? d.role.filter(Boolean).join('\n') : d.role;
+	    }).attr('placeholder', function (d) {
+	      return Array.isArray(d.role) ? _t('inspector.multiple_roles') : _t('inspector.role');
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(d.role);
+	    }).call(utilNoAuto).on('blur', changeRole).on('change', changeRole);
+
+	    if (taginfo) {
+	      wrapEnter.each(bindTypeahead);
+	    }
+
+	    var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit
+
+	    newMembership.exit().remove(); // Enter
+
+	    var newMembershipEnter = newMembership.enter().append('li').attr('class', 'member-row member-row-new form-field');
+	    var newLabelEnter = newMembershipEnter.append('label').attr('class', 'field-label');
+	    newLabelEnter.append('input').attr('placeholder', _t('inspector.choose_relation')).attr('type', 'text').attr('class', 'member-entity-input').call(utilNoAuto);
+	    newLabelEnter.append('button').attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete')).on('click', function () {
+	      list.selectAll('.member-row-new').remove();
+	    });
+	    var newWrapEnter = newMembershipEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+	    newWrapEnter.append('input').attr('class', 'member-role').property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto); // Update
+
+	    newMembership = newMembership.merge(newMembershipEnter);
+	    newMembership.selectAll('.member-entity-input').on('blur', cancelEntity) // if it wasn't accepted normally, cancel it
+	    .call(nearbyCombo.on('accept', acceptEntity).on('cancel', cancelEntity)); // Container for the Add button
+
+	    var addRow = selection.selectAll('.add-row').data([0]); // enter
+
+	    var addRowEnter = addRow.enter().append('div').attr('class', 'add-row');
+	    var addRelationButton = addRowEnter.append('button').attr('class', 'add-relation');
+	    addRelationButton.call(svgIcon('#iD-icon-plus', 'light'));
+	    addRelationButton.call(uiTooltip().title(_t.html('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
+	    addRowEnter.append('div').attr('class', 'space-value'); // preserve space
+
+	    addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+	    // update
+
+	    addRow = addRow.merge(addRowEnter);
+	    addRow.select('.add-relation').on('click', function () {
+	      _showBlank = true;
+	      section.reRender();
+	      list.selectAll('.member-entity-input').node().focus();
+	    });
+
+	    function acceptEntity(d) {
+	      if (!d) {
+	        cancelEntity();
+	        return;
+	      } // remove hover-higlighting
 
-	var BufferSubgraph = function BufferSubgraph () {
-	  this._finder = null;
-	  this._dirEdgeList = new ArrayList();
-	  this._nodes = new ArrayList();
-	  this._rightMostCoord = null;
-	  this._env = null;
-	  this._finder = new RightmostEdgeFinder();
-	};
-	BufferSubgraph.prototype.clearVisitedEdges = function clearVisitedEdges () {
-	  for (var it = this._dirEdgeList.iterator(); it.hasNext();) {
-	    var de = it.next();
-	    de.setVisited(false);
-	  }
-	};
-	BufferSubgraph.prototype.getRightmostCoordinate = function getRightmostCoordinate () {
-	  return this._rightMostCoord
-	};
-	BufferSubgraph.prototype.computeNodeDepth = function computeNodeDepth (n) {
-	    var this$1 = this;
 
-	  var startEdge = null;
-	  for (var i = n.getEdges().iterator(); i.hasNext();) {
-	    var de = i.next();
-	    if (de.isVisited() || de.getSym().isVisited()) {
-	      startEdge = de;
-	      break
+	      if (d.relation) utilHighlightEntities([d.relation.id], false, context);
+	      var role = context.cleanRelationRole(list.selectAll('.member-row-new .member-role').property('value'));
+	      addMembership(d, role);
 	    }
-	  }
-	  if (startEdge === null) { throw new TopologyException('unable to find edge to compute depths at ' + n.getCoordinate()) }
-	  n.getEdges().computeDepths(startEdge);
-	  for (var i$1 = n.getEdges().iterator(); i$1.hasNext();) {
-	    var de$1 = i$1.next();
-	    de$1.setVisited(true);
-	    this$1.copySymDepths(de$1);
-	  }
-	};
-	BufferSubgraph.prototype.computeDepth = function computeDepth (outsideDepth) {
-	  this.clearVisitedEdges();
-	  var de = this._finder.getEdge();
-	  // const n = de.getNode()
-	  // const label = de.getLabel()
-	  de.setEdgeDepths(Position.RIGHT, outsideDepth);
-	  this.copySymDepths(de);
-	  this.computeDepths(de);
-	};
-	BufferSubgraph.prototype.create = function create (node) {
-	  this.addReachable(node);
-	  this._finder.findEdge(this._dirEdgeList);
-	  this._rightMostCoord = this._finder.getCoordinate();
-	};
-	BufferSubgraph.prototype.findResultEdges = function findResultEdges () {
-	  for (var it = this._dirEdgeList.iterator(); it.hasNext();) {
-	    var de = it.next();
-	    if (de.getDepth(Position.RIGHT) >= 1 && de.getDepth(Position.LEFT) <= 0 && !de.isInteriorAreaEdge()) {
-	      de.setInResult(true);
+
+	    function cancelEntity() {
+	      var input = newMembership.selectAll('.member-entity-input');
+	      input.property('value', ''); // remove hover-higlighting
+
+	      context.surface().selectAll('.highlighted').classed('highlighted', false);
 	    }
-	  }
-	};
-	BufferSubgraph.prototype.computeDepths = function computeDepths (startEdge) {
-	    var this$1 = this;
-
-	  var nodesVisited = new HashSet();
-	  var nodeQueue = new LinkedList();
-	  var startNode = startEdge.getNode();
-	  nodeQueue.addLast(startNode);
-	  nodesVisited.add(startNode);
-	  startEdge.setVisited(true);
-	  while (!nodeQueue.isEmpty()) {
-	    var n = nodeQueue.removeFirst();
-	    nodesVisited.add(n);
-	    this$1.computeNodeDepth(n);
-	    for (var i = n.getEdges().iterator(); i.hasNext();) {
-	      var de = i.next();
-	      var sym = de.getSym();
-	      if (sym.isVisited()) { continue }
-	      var adjNode = sym.getNode();
-	      if (!nodesVisited.contains(adjNode)) {
-	        nodeQueue.addLast(adjNode);
-	        nodesVisited.add(adjNode);
+
+	    function bindTypeahead(d) {
+	      var row = select(this);
+	      var role = row.selectAll('input.member-role');
+	      var origValue = role.property('value');
+
+	      function sort(value, data) {
+	        var sameletter = [];
+	        var other = [];
+
+	        for (var i = 0; i < data.length; i++) {
+	          if (data[i].value.substring(0, value.length) === value) {
+	            sameletter.push(data[i]);
+	          } else {
+	            other.push(data[i]);
+	          }
+	        }
+
+	        return sameletter.concat(other);
 	      }
+
+	      role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
+	        var rtype = d.relation.tags.type;
+	        taginfo.roles({
+	          debounce: true,
+	          rtype: rtype || '',
+	          geometry: context.graph().geometry(_entityIDs[0]),
+	          query: role
+	        }, function (err, data) {
+	          if (!err) callback(sort(role, data));
+	        });
+	      }).on('cancel', function () {
+	        role.property('value', origValue);
+	      }));
+	    }
+
+	    function unbind() {
+	      var row = select(this);
+	      row.selectAll('input.member-role').call(uiCombobox.off, context);
 	    }
 	  }
-	};
-	BufferSubgraph.prototype.compareTo = function compareTo (o) {
-	  var graph = o;
-	  if (this._rightMostCoord.x < graph._rightMostCoord.x) {
-	    return -1
-	  }
-	  if (this._rightMostCoord.x > graph._rightMostCoord.x) {
-	    return 1
-	  }
-	  return 0
-	};
-	BufferSubgraph.prototype.getEnvelope = function getEnvelope () {
-	  if (this._env === null) {
-	    var edgeEnv = new Envelope();
-	    for (var it = this._dirEdgeList.iterator(); it.hasNext();) {
-	      var dirEdge = it.next();
-	      var pts = dirEdge.getEdge().getCoordinates();
-	      for (var i = 0; i < pts.length - 1; i++) {
-	        edgeEnv.expandToInclude(pts[i]);
-	      }
+
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _showBlank = false;
+	    return section;
+	  };
+
+	  return section;
+	}
+
+	function uiSectionSelectionList(context) {
+	  var _selectedIDs = [];
+	  var section = uiSection('selected-features', context).shouldDisplay(function () {
+	    return _selectedIDs.length > 1;
+	  }).label(function () {
+	    return _t('inspector.title_count', {
+	      title: _t.html('inspector.features'),
+	      count: _selectedIDs.length
+	    });
+	  }).disclosureContent(renderDisclosureContent);
+	  context.history().on('change.selectionList', function (difference) {
+	    if (difference) {
+	      section.reRender();
 	    }
-	    this._env = edgeEnv;
+	  });
+
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _selectedIDs;
+	    _selectedIDs = val;
+	    return section;
+	  };
+
+	  function selectEntity(d3_event, entity) {
+	    context.enter(modeSelect(context, [entity.id]));
 	  }
-	  return this._env
-	};
-	BufferSubgraph.prototype.addReachable = function addReachable (startNode) {
-	    var this$1 = this;
 
-	  var nodeStack = new Stack();
-	  nodeStack.add(startNode);
-	  while (!nodeStack.empty()) {
-	    var node = nodeStack.pop();
-	    this$1.add(node, nodeStack);
+	  function deselectEntity(d3_event, entity) {
+	    d3_event.stopPropagation();
+
+	    var selectedIDs = _selectedIDs.slice();
+
+	    var index = selectedIDs.indexOf(entity.id);
+
+	    if (index > -1) {
+	      selectedIDs.splice(index, 1);
+	      context.enter(modeSelect(context, selectedIDs));
+	    }
 	  }
-	};
-	BufferSubgraph.prototype.copySymDepths = function copySymDepths (de) {
-	  var sym = de.getSym();
-	  sym.setDepth(Position.LEFT, de.getDepth(Position.RIGHT));
-	  sym.setDepth(Position.RIGHT, de.getDepth(Position.LEFT));
-	};
-	BufferSubgraph.prototype.add = function add (node, nodeStack) {
-	    var this$1 = this;
-
-	  node.setVisited(true);
-	  this._nodes.add(node);
-	  for (var i = node.getEdges().iterator(); i.hasNext();) {
-	    var de = i.next();
-	    this$1._dirEdgeList.add(de);
-	    var sym = de.getSym();
-	    var symNode = sym.getNode();
-	    if (!symNode.isVisited()) { nodeStack.push(symNode); }
+
+	  function renderDisclosureContent(selection) {
+	    var list = selection.selectAll('.feature-list').data([0]);
+	    list = list.enter().append('div').attr('class', 'feature-list').merge(list);
+
+	    var entities = _selectedIDs.map(function (id) {
+	      return context.hasEntity(id);
+	    }).filter(Boolean);
+
+	    var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
+	    items.exit().remove(); // Enter
+
+	    var enter = items.enter().append('button').attr('class', 'feature-list-item').on('click', selectEntity);
+	    enter.each(function (d) {
+	      select(this).on('mouseover', function () {
+	        utilHighlightEntities([d.id], true, context);
+	      });
+	      select(this).on('mouseout', function () {
+	        utilHighlightEntities([d.id], false, context);
+	      });
+	    });
+	    var label = enter.append('div').attr('class', 'label');
+	    enter.append('button').attr('class', 'close').attr('title', _t('icons.deselect')).on('click', deselectEntity).call(svgIcon('#iD-icon-close'));
+	    label.append('span').attr('class', 'entity-geom-icon').call(svgIcon('', 'pre-text'));
+	    label.append('span').attr('class', 'entity-type');
+	    label.append('span').attr('class', 'entity-name'); // Update
+
+	    items = items.merge(enter);
+	    items.selectAll('.entity-geom-icon use').attr('href', function () {
+	      var entity = this.parentNode.parentNode.__data__;
+	      return '#iD-icon-' + entity.geometry(context.graph());
+	    });
+	    items.selectAll('.entity-type').html(function (entity) {
+	      return _mainPresetIndex.match(entity, context.graph()).name();
+	    });
+	    items.selectAll('.entity-name').html(function (d) {
+	      // fetch latest entity
+	      var entity = context.entity(d.id);
+	      return utilDisplayName(entity);
+	    });
 	  }
-	};
-	BufferSubgraph.prototype.getNodes = function getNodes () {
-	  return this._nodes
-	};
-	BufferSubgraph.prototype.getDirectedEdges = function getDirectedEdges () {
-	  return this._dirEdgeList
-	};
-	BufferSubgraph.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	BufferSubgraph.prototype.getClass = function getClass () {
-	  return BufferSubgraph
-	};
 
-	var TopologyLocation = function TopologyLocation () {
-	  var this$1 = this;
+	  return section;
+	}
+
+	function uiEntityEditor(context) {
+	  var dispatch$1 = dispatch('choose');
+	  var _state = 'select';
+	  var _coalesceChanges = false;
+	  var _modified = false;
 
-	  this.location = null;
-	  if (arguments.length === 1) {
-	    if (arguments[0] instanceof Array) {
-	      var location = arguments[0];
-	      this.init(location.length);
-	    } else if (Number.isInteger(arguments[0])) {
-	      var on = arguments[0];
-	      this.init(1);
-	      this.location[Position.ON] = on;
-	    } else if (arguments[0] instanceof TopologyLocation) {
-	      var gl = arguments[0];
-	      this.init(gl.location.length);
-	      if (gl !== null) {
-	        for (var i = 0; i < this.location.length; i++) {
-	          this$1.location[i] = gl.location[i];
-	        }
-	      }
-	    }
-	  } else if (arguments.length === 3) {
-	    var on$1 = arguments[0];
-	    var left = arguments[1];
-	    var right = arguments[2];
-	    this.init(3);
-	    this.location[Position.ON] = on$1;
-	    this.location[Position.LEFT] = left;
-	    this.location[Position.RIGHT] = right;
-	  }
-	};
-	TopologyLocation.prototype.setAllLocations = function setAllLocations (locValue) {
-	    var this$1 = this;
+	  var _base;
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    this$1.location[i] = locValue;
-	  }
-	};
-	TopologyLocation.prototype.isNull = function isNull () {
-	    var this$1 = this;
+	  var _entityIDs;
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] !== Location.NONE) { return false }
-	  }
-	  return true
-	};
-	TopologyLocation.prototype.setAllLocationsIfNull = function setAllLocationsIfNull (locValue) {
-	    var this$1 = this;
+	  var _activePresets = [];
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] === Location.NONE) { this$1.location[i] = locValue; }
-	  }
-	};
-	TopologyLocation.prototype.isLine = function isLine () {
-	  return this.location.length === 1
-	};
-	TopologyLocation.prototype.merge = function merge (gl) {
-	    var this$1 = this;
+	  var _newFeature;
 
-	  if (gl.location.length > this.location.length) {
-	    var newLoc = new Array(3).fill(null);
-	    newLoc[Position.ON] = this.location[Position.ON];
-	    newLoc[Position.LEFT] = Location.NONE;
-	    newLoc[Position.RIGHT] = Location.NONE;
-	    this.location = newLoc;
-	  }
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] === Location.NONE && i < gl.location.length) { this$1.location[i] = gl.location[i]; }
-	  }
-	};
-	TopologyLocation.prototype.getLocations = function getLocations () {
-	  return this.location
-	};
-	TopologyLocation.prototype.flip = function flip () {
-	  if (this.location.length <= 1) { return null }
-	  var temp = this.location[Position.LEFT];
-	  this.location[Position.LEFT] = this.location[Position.RIGHT];
-	  this.location[Position.RIGHT] = temp;
-	};
-	TopologyLocation.prototype.toString = function toString () {
-	  var buf = new StringBuffer();
-	  if (this.location.length > 1) { buf.append(Location.toLocationSymbol(this.location[Position.LEFT])); }
-	  buf.append(Location.toLocationSymbol(this.location[Position.ON]));
-	  if (this.location.length > 1) { buf.append(Location.toLocationSymbol(this.location[Position.RIGHT])); }
-	  return buf.toString()
-	};
-	TopologyLocation.prototype.setLocations = function setLocations (on, left, right) {
-	  this.location[Position.ON] = on;
-	  this.location[Position.LEFT] = left;
-	  this.location[Position.RIGHT] = right;
-	};
-	TopologyLocation.prototype.get = function get (posIndex) {
-	  if (posIndex < this.location.length) { return this.location[posIndex] }
-	  return Location.NONE
-	};
-	TopologyLocation.prototype.isArea = function isArea () {
-	  return this.location.length > 1
-	};
-	TopologyLocation.prototype.isAnyNull = function isAnyNull () {
-	    var this$1 = this;
+	  var _sections;
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] === Location.NONE) { return true }
-	  }
-	  return false
-	};
-	TopologyLocation.prototype.setLocation = function setLocation () {
-	  if (arguments.length === 1) {
-	    var locValue = arguments[0];
-	    this.setLocation(Position.ON, locValue);
-	  } else if (arguments.length === 2) {
-	    var locIndex = arguments[0];
-	    var locValue$1 = arguments[1];
-	    this.location[locIndex] = locValue$1;
-	  }
-	};
-	TopologyLocation.prototype.init = function init (size) {
-	  this.location = new Array(size).fill(null);
-	  this.setAllLocations(Location.NONE);
-	};
-	TopologyLocation.prototype.isEqualOnSide = function isEqualOnSide (le, locIndex) {
-	  return this.location[locIndex] === le.location[locIndex]
-	};
-	TopologyLocation.prototype.allPositionsEqual = function allPositionsEqual (loc) {
-	    var this$1 = this;
+	  function entityEditor(selection) {
+	    var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    if (this$1.location[i] !== loc) { return false }
-	  }
-	  return true
-	};
-	TopologyLocation.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	TopologyLocation.prototype.getClass = function getClass () {
-	  return TopologyLocation
-	};
+	    var header = selection.selectAll('.header').data([0]); // Enter
 
-	var Label = function Label () {
-	  this.elt = new Array(2).fill(null);
-	  if (arguments.length === 1) {
-	    if (Number.isInteger(arguments[0])) {
-	      var onLoc = arguments[0];
-	      this.elt[0] = new TopologyLocation(onLoc);
-	      this.elt[1] = new TopologyLocation(onLoc);
-	    } else if (arguments[0] instanceof Label) {
-	      var lbl = arguments[0];
-	      this.elt[0] = new TopologyLocation(lbl.elt[0]);
-	      this.elt[1] = new TopologyLocation(lbl.elt[1]);
-	    }
-	  } else if (arguments.length === 2) {
-	    var geomIndex = arguments[0];
-	    var onLoc$1 = arguments[1];
-	    this.elt[0] = new TopologyLocation(Location.NONE);
-	    this.elt[1] = new TopologyLocation(Location.NONE);
-	    this.elt[geomIndex].setLocation(onLoc$1);
-	  } else if (arguments.length === 3) {
-	    var onLoc$2 = arguments[0];
-	    var leftLoc = arguments[1];
-	    var rightLoc = arguments[2];
-	    this.elt[0] = new TopologyLocation(onLoc$2, leftLoc, rightLoc);
-	    this.elt[1] = new TopologyLocation(onLoc$2, leftLoc, rightLoc);
-	  } else if (arguments.length === 4) {
-	    var geomIndex$1 = arguments[0];
-	    var onLoc$3 = arguments[1];
-	    var leftLoc$1 = arguments[2];
-	    var rightLoc$1 = arguments[3];
-	    this.elt[0] = new TopologyLocation(Location.NONE, Location.NONE, Location.NONE);
-	    this.elt[1] = new TopologyLocation(Location.NONE, Location.NONE, Location.NONE);
-	    this.elt[geomIndex$1].setLocations(onLoc$3, leftLoc$1, rightLoc$1);
-	  }
-	};
-	Label.prototype.getGeometryCount = function getGeometryCount () {
-	  var count = 0;
-	  if (!this.elt[0].isNull()) { count++; }
-	  if (!this.elt[1].isNull()) { count++; }
-	  return count
-	};
-	Label.prototype.setAllLocations = function setAllLocations (geomIndex, location) {
-	  this.elt[geomIndex].setAllLocations(location);
-	};
-	Label.prototype.isNull = function isNull (geomIndex) {
-	  return this.elt[geomIndex].isNull()
-	};
-	Label.prototype.setAllLocationsIfNull = function setAllLocationsIfNull () {
-	  if (arguments.length === 1) {
-	    var location = arguments[0];
-	    this.setAllLocationsIfNull(0, location);
-	    this.setAllLocationsIfNull(1, location);
-	  } else if (arguments.length === 2) {
-	    var geomIndex = arguments[0];
-	    var location$1 = arguments[1];
-	    this.elt[geomIndex].setAllLocationsIfNull(location$1);
-	  }
-	};
-	Label.prototype.isLine = function isLine (geomIndex) {
-	  return this.elt[geomIndex].isLine()
-	};
-	Label.prototype.merge = function merge (lbl) {
-	    var this$1 = this;
+	    var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'preset-reset preset-choose').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-forward' : '#iD-icon-backward'));
+	    headerEnter.append('button').attr('class', 'close').on('click', function () {
+	      context.enter(modeBrowse(context));
+	    }).call(svgIcon(_modified ? '#iD-icon-apply' : '#iD-icon-close'));
+	    headerEnter.append('h3'); // Update
 
-	  for (var i = 0; i < 2; i++) {
-	    if (this$1.elt[i] === null && lbl.elt[i] !== null) {
-	      this$1.elt[i] = new TopologyLocation(lbl.elt[i]);
-	    } else {
-	      this$1.elt[i].merge(lbl.elt[i]);
+	    header = header.merge(headerEnter);
+	    header.selectAll('h3').html(_entityIDs.length === 1 ? _t.html('inspector.edit') : _t.html('inspector.edit_features'));
+	    header.selectAll('.preset-reset').on('click', function () {
+	      dispatch$1.call('choose', this, _activePresets);
+	    }); // Body
+
+	    var body = selection.selectAll('.inspector-body').data([0]); // Enter
+
+	    var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update
+
+	    body = body.merge(bodyEnter);
+
+	    if (!_sections) {
+	      _sections = [uiSectionSelectionList(context), uiSectionFeatureType(context).on('choose', function (presets) {
+	        dispatch$1.call('choose', this, presets);
+	      }), uiSectionEntityIssues(context), uiSectionPresetFields(context).on('change', changeTags).on('revert', revertTags), uiSectionRawTagEditor('raw-tag-editor', context).on('change', changeTags), uiSectionRawMemberEditor(context), uiSectionRawMembershipEditor(context)];
 	    }
-	  }
-	};
-	Label.prototype.flip = function flip () {
-	  this.elt[0].flip();
-	  this.elt[1].flip();
-	};
-	Label.prototype.getLocation = function getLocation () {
-	  if (arguments.length === 1) {
-	    var geomIndex = arguments[0];
-	    return this.elt[geomIndex].get(Position.ON)
-	  } else if (arguments.length === 2) {
-	    var geomIndex$1 = arguments[0];
-	    var posIndex = arguments[1];
-	    return this.elt[geomIndex$1].get(posIndex)
-	  }
-	};
-	Label.prototype.toString = function toString () {
-	  var buf = new StringBuffer();
-	  if (this.elt[0] !== null) {
-	    buf.append('A:');
-	    buf.append(this.elt[0].toString());
-	  }
-	  if (this.elt[1] !== null) {
-	    buf.append(' B:');
-	    buf.append(this.elt[1].toString());
-	  }
-	  return buf.toString()
-	};
-	Label.prototype.isArea = function isArea () {
-	  if (arguments.length === 0) {
-	    return this.elt[0].isArea() || this.elt[1].isArea()
-	  } else if (arguments.length === 1) {
-	    var geomIndex = arguments[0];
-	    return this.elt[geomIndex].isArea()
-	  }
-	};
-	Label.prototype.isAnyNull = function isAnyNull (geomIndex) {
-	  return this.elt[geomIndex].isAnyNull()
-	};
-	Label.prototype.setLocation = function setLocation () {
-	  if (arguments.length === 2) {
-	    var geomIndex = arguments[0];
-	    var location = arguments[1];
-	    this.elt[geomIndex].setLocation(Position.ON, location);
-	  } else if (arguments.length === 3) {
-	    var geomIndex$1 = arguments[0];
-	    var posIndex = arguments[1];
-	    var location$1 = arguments[2];
-	    this.elt[geomIndex$1].setLocation(posIndex, location$1);
-	  }
-	};
-	Label.prototype.isEqualOnSide = function isEqualOnSide (lbl, side) {
-	  return this.elt[0].isEqualOnSide(lbl.elt[0], side) && this.elt[1].isEqualOnSide(lbl.elt[1], side)
-	};
-	Label.prototype.allPositionsEqual = function allPositionsEqual (geomIndex, loc) {
-	  return this.elt[geomIndex].allPositionsEqual(loc)
-	};
-	Label.prototype.toLine = function toLine (geomIndex) {
-	  if (this.elt[geomIndex].isArea()) { this.elt[geomIndex] = new TopologyLocation(this.elt[geomIndex].location[0]); }
-	};
-	Label.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Label.prototype.getClass = function getClass () {
-	  return Label
-	};
-	Label.toLineLabel = function toLineLabel (label) {
-	  var lineLabel = new Label(Location.NONE);
-	  for (var i = 0; i < 2; i++) {
-	    lineLabel.setLocation(i, label.getLocation(i));
-	  }
-	  return lineLabel
-	};
 
-	var EdgeRing = function EdgeRing () {
-	  this._startDe = null;
-	  this._maxNodeDegree = -1;
-	  this._edges = new ArrayList();
-	  this._pts = new ArrayList();
-	  this._label = new Label(Location.NONE);
-	  this._ring = null;
-	  this._isHole = null;
-	  this._shell = null;
-	  this._holes = new ArrayList();
-	  this._geometryFactory = null;
-	  var start = arguments[0];
-	  var geometryFactory = arguments[1];
-	  this._geometryFactory = geometryFactory;
-	  this.computePoints(start);
-	  this.computeRing();
-	};
-	EdgeRing.prototype.computeRing = function computeRing () {
-	    var this$1 = this;
+	    _sections.forEach(function (section) {
+	      if (section.entityIDs) {
+	        section.entityIDs(_entityIDs);
+	      }
 
-	  if (this._ring !== null) { return null }
-	  var coord = new Array(this._pts.size()).fill(null);
-	  for (var i = 0; i < this._pts.size(); i++) {
-	    coord[i] = this$1._pts.get(i);
-	  }
-	  this._ring = this._geometryFactory.createLinearRing(coord);
-	  this._isHole = CGAlgorithms.isCCW(this._ring.getCoordinates());
-	};
-	EdgeRing.prototype.isIsolated = function isIsolated () {
-	  return this._label.getGeometryCount() === 1
-	};
-	EdgeRing.prototype.computePoints = function computePoints (start) {
-	    var this$1 = this;
+	      if (section.presets) {
+	        section.presets(_activePresets);
+	      }
 
-	  this._startDe = start;
-	  var de = start;
-	  var isFirstEdge = true;
-	  do {
-	    if (de === null) { throw new TopologyException('Found null DirectedEdge') }
-	    if (de.getEdgeRing() === this$1) { throw new TopologyException('Directed Edge visited twice during ring-building at ' + de.getCoordinate()) }
-	    this$1._edges.add(de);
-	    var label = de.getLabel();
-	    Assert.isTrue(label.isArea());
-	    this$1.mergeLabel(label);
-	    this$1.addPoints(de.getEdge(), de.isForward(), isFirstEdge);
-	    isFirstEdge = false;
-	    this$1.setEdgeRing(de, this$1);
-	    de = this$1.getNext(de);
-	  } while (de !== this._startDe)
-	};
-	EdgeRing.prototype.getLinearRing = function getLinearRing () {
-	  return this._ring
-	};
-	EdgeRing.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pts.get(i)
-	};
-	EdgeRing.prototype.computeMaxNodeDegree = function computeMaxNodeDegree () {
-	    var this$1 = this;
+	      if (section.tags) {
+	        section.tags(combinedTags);
+	      }
 
-	  this._maxNodeDegree = 0;
-	  var de = this._startDe;
-	  do {
-	    var node = de.getNode();
-	    var degree = node.getEdges().getOutgoingDegree(this$1);
-	    if (degree > this$1._maxNodeDegree) { this$1._maxNodeDegree = degree; }
-	    de = this$1.getNext(de);
-	  } while (de !== this._startDe)
-	  this._maxNodeDegree *= 2;
-	};
-	EdgeRing.prototype.addPoints = function addPoints (edge, isForward, isFirstEdge) {
-	    var this$1 = this;
+	      if (section.state) {
+	        section.state(_state);
+	      }
 
-	  var edgePts = edge.getCoordinates();
-	  if (isForward) {
-	    var startIndex = 1;
-	    if (isFirstEdge) { startIndex = 0; }
-	    for (var i = startIndex; i < edgePts.length; i++) {
-	      this$1._pts.add(edgePts[i]);
-	    }
-	  } else {
-	    var startIndex$1 = edgePts.length - 2;
-	    if (isFirstEdge) { startIndex$1 = edgePts.length - 1; }
-	    for (var i$1 = startIndex$1; i$1 >= 0; i$1--) {
-	      this$1._pts.add(edgePts[i$1]);
-	    }
-	  }
-	};
-	EdgeRing.prototype.isHole = function isHole () {
-	  return this._isHole
-	};
-	EdgeRing.prototype.setInResult = function setInResult () {
-	  var de = this._startDe;
-	  do {
-	    de.getEdge().setInResult(true);
-	    de = de.getNext();
-	  } while (de !== this._startDe)
-	};
-	EdgeRing.prototype.containsPoint = function containsPoint (p) {
-	  var shell = this.getLinearRing();
-	  var env = shell.getEnvelopeInternal();
-	  if (!env.contains(p)) { return false }
-	  if (!CGAlgorithms.isPointInRing(p, shell.getCoordinates())) { return false }
-	  for (var i = this._holes.iterator(); i.hasNext();) {
-	    var hole = i.next();
-	    if (hole.containsPoint(p)) { return false }
-	  }
-	  return true
-	};
-	EdgeRing.prototype.addHole = function addHole (ring) {
-	  this._holes.add(ring);
-	};
-	EdgeRing.prototype.isShell = function isShell () {
-	  return this._shell === null
-	};
-	EdgeRing.prototype.getLabel = function getLabel () {
-	  return this._label
-	};
-	EdgeRing.prototype.getEdges = function getEdges () {
-	  return this._edges
-	};
-	EdgeRing.prototype.getMaxNodeDegree = function getMaxNodeDegree () {
-	  if (this._maxNodeDegree < 0) { this.computeMaxNodeDegree(); }
-	  return this._maxNodeDegree
-	};
-	EdgeRing.prototype.getShell = function getShell () {
-	  return this._shell
-	};
-	EdgeRing.prototype.mergeLabel = function mergeLabel () {
-	  if (arguments.length === 1) {
-	    var deLabel = arguments[0];
-	    this.mergeLabel(deLabel, 0);
-	    this.mergeLabel(deLabel, 1);
-	  } else if (arguments.length === 2) {
-	    var deLabel$1 = arguments[0];
-	    var geomIndex = arguments[1];
-	    var loc = deLabel$1.getLocation(geomIndex, Position.RIGHT);
-	    if (loc === Location.NONE) { return null }
-	    if (this._label.getLocation(geomIndex) === Location.NONE) {
-	      this._label.setLocation(geomIndex, loc);
-	      return null
+	      body.call(section.render);
+	    });
+
+	    context.history().on('change.entity-editor', historyChanged);
+
+	    function historyChanged(difference) {
+	      if (selection.selectAll('.entity-editor').empty()) return;
+	      if (_state === 'hide') return;
+	      var significant = !difference || difference.didChange.properties || difference.didChange.addition || difference.didChange.deletion;
+	      if (!significant) return;
+	      _entityIDs = _entityIDs.filter(context.hasEntity);
+	      if (!_entityIDs.length) return;
+	      var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
+	      loadActivePresets();
+	      var graph = context.graph();
+	      entityEditor.modified(_base !== graph);
+	      entityEditor(selection);
+
+	      if (priorActivePreset && _activePresets.length === 1 && priorActivePreset !== _activePresets[0]) {
+	        // flash the button to indicate the preset changed
+	        context.container().selectAll('.entity-editor button.preset-reset .label').style('background-color', '#fff').transition().duration(750).style('background-color', null);
+	      }
 	    }
-	  }
-	};
-	EdgeRing.prototype.setShell = function setShell (shell) {
-	  this._shell = shell;
-	  if (shell !== null) { shell.addHole(this); }
-	};
-	EdgeRing.prototype.toPolygon = function toPolygon (geometryFactory) {
-	    var this$1 = this;
+	  } // Tag changes that fire on input can all get coalesced into a single
+	  // history operation when the user leaves the field.  #2342
+	  // Use explicit entityIDs in case the selection changes before the event is fired.
 
-	  var holeLR = new Array(this._holes.size()).fill(null);
-	  for (var i = 0; i < this._holes.size(); i++) {
-	    holeLR[i] = this$1._holes.get(i).getLinearRing();
-	  }
-	  var poly = geometryFactory.createPolygon(this.getLinearRing(), holeLR);
-	  return poly
-	};
-	EdgeRing.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeRing.prototype.getClass = function getClass () {
-	  return EdgeRing
-	};
 
-	var MinimalEdgeRing = (function (EdgeRing$$1) {
-	  function MinimalEdgeRing () {
-	    var start = arguments[0];
-	    var geometryFactory = arguments[1];
-	    EdgeRing$$1.call(this, start, geometryFactory);
-	  }
+	  function changeTags(entityIDs, changed, onInput) {
+	    var actions = [];
 
-	  if ( EdgeRing$$1 ) { MinimalEdgeRing.__proto__ = EdgeRing$$1; }
-	  MinimalEdgeRing.prototype = Object.create( EdgeRing$$1 && EdgeRing$$1.prototype );
-	  MinimalEdgeRing.prototype.constructor = MinimalEdgeRing;
-	  MinimalEdgeRing.prototype.setEdgeRing = function setEdgeRing (de, er) {
-	    de.setMinEdgeRing(er);
-	  };
-	  MinimalEdgeRing.prototype.getNext = function getNext (de) {
-	    return de.getNextMin()
-	  };
-	  MinimalEdgeRing.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  MinimalEdgeRing.prototype.getClass = function getClass () {
-	    return MinimalEdgeRing
-	  };
+	    for (var i in entityIDs) {
+	      var entityID = entityIDs[i];
+	      var entity = context.entity(entityID);
+	      var tags = Object.assign({}, entity.tags); // shallow copy
 
-	  return MinimalEdgeRing;
-	}(EdgeRing));
+	      for (var k in changed) {
+	        if (!k) continue;
+	        var v = changed[k];
 
-	var MaximalEdgeRing = (function (EdgeRing$$1) {
-	  function MaximalEdgeRing () {
-	    var start = arguments[0];
-	    var geometryFactory = arguments[1];
-	    EdgeRing$$1.call(this, start, geometryFactory);
-	  }
+	        if (v !== undefined || tags.hasOwnProperty(k)) {
+	          tags[k] = v;
+	        }
+	      }
 
-	  if ( EdgeRing$$1 ) { MaximalEdgeRing.__proto__ = EdgeRing$$1; }
-	  MaximalEdgeRing.prototype = Object.create( EdgeRing$$1 && EdgeRing$$1.prototype );
-	  MaximalEdgeRing.prototype.constructor = MaximalEdgeRing;
-	  MaximalEdgeRing.prototype.buildMinimalRings = function buildMinimalRings () {
-	    var this$1 = this;
+	      if (!onInput) {
+	        tags = utilCleanTags(tags);
+	      }
 
-	    var minEdgeRings = new ArrayList();
-	    var de = this._startDe;
-	    do {
-	      if (de.getMinEdgeRing() === null) {
-	        var minEr = new MinimalEdgeRing(de, this$1._geometryFactory);
-	        minEdgeRings.add(minEr);
+	      if (!fastDeepEqual(entity.tags, tags)) {
+	        actions.push(actionChangeTags(entityID, tags));
 	      }
-	      de = de.getNext();
-	    } while (de !== this._startDe)
-	    return minEdgeRings
-	  };
-	  MaximalEdgeRing.prototype.setEdgeRing = function setEdgeRing (de, er) {
-	    de.setEdgeRing(er);
-	  };
-	  MaximalEdgeRing.prototype.linkDirectedEdgesForMinimalEdgeRings = function linkDirectedEdgesForMinimalEdgeRings () {
-	    var this$1 = this;
+	    }
 
-	    var de = this._startDe;
-	    do {
-	      var node = de.getNode();
-	      node.getEdges().linkMinimalDirectedEdges(this$1);
-	      de = de.getNext();
-	    } while (de !== this._startDe)
-	  };
-	  MaximalEdgeRing.prototype.getNext = function getNext (de) {
-	    return de.getNext()
-	  };
-	  MaximalEdgeRing.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  MaximalEdgeRing.prototype.getClass = function getClass () {
-	    return MaximalEdgeRing
-	  };
+	    if (actions.length) {
+	      var combinedAction = function combinedAction(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
+	        });
+	        return graph;
+	      };
 
-	  return MaximalEdgeRing;
-	}(EdgeRing));
+	      var annotation = _t('operations.change_tags.annotation');
 
-	var GraphComponent = function GraphComponent () {
-	  this._label = null;
-	  this._isInResult = false;
-	  this._isCovered = false;
-	  this._isCoveredSet = false;
-	  this._isVisited = false;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var label = arguments[0];
-	    this._label = label;
-	  }
-	};
-	GraphComponent.prototype.setVisited = function setVisited (isVisited) {
-	  this._isVisited = isVisited;
-	};
-	GraphComponent.prototype.setInResult = function setInResult (isInResult) {
-	  this._isInResult = isInResult;
-	};
-	GraphComponent.prototype.isCovered = function isCovered () {
-	  return this._isCovered
-	};
-	GraphComponent.prototype.isCoveredSet = function isCoveredSet () {
-	  return this._isCoveredSet
-	};
-	GraphComponent.prototype.setLabel = function setLabel (label) {
-	  this._label = label;
-	};
-	GraphComponent.prototype.getLabel = function getLabel () {
-	  return this._label
-	};
-	GraphComponent.prototype.setCovered = function setCovered (isCovered) {
-	  this._isCovered = isCovered;
-	  this._isCoveredSet = true;
-	};
-	GraphComponent.prototype.updateIM = function updateIM (im) {
-	  Assert.isTrue(this._label.getGeometryCount() >= 2, 'found partial label');
-	  this.computeIM(im);
-	};
-	GraphComponent.prototype.isInResult = function isInResult () {
-	  return this._isInResult
-	};
-	GraphComponent.prototype.isVisited = function isVisited () {
-	  return this._isVisited
-	};
-	GraphComponent.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GraphComponent.prototype.getClass = function getClass () {
-	  return GraphComponent
-	};
+	      if (_coalesceChanges) {
+	        context.overwrite(combinedAction, annotation);
+	      } else {
+	        context.perform(combinedAction, annotation);
+	        _coalesceChanges = !!onInput;
+	      }
+	    } // if leaving field (blur event), rerun validation
 
-	var Node$1 = (function (GraphComponent$$1) {
-	  function Node () {
-	    GraphComponent$$1.call(this);
-	    this._coord = null;
-	    this._edges = null;
-	    var coord = arguments[0];
-	    var edges = arguments[1];
-	    this._coord = coord;
-	    this._edges = edges;
-	    this._label = new Label(0, Location.NONE);
-	  }
-
-	  if ( GraphComponent$$1 ) { Node.__proto__ = GraphComponent$$1; }
-	  Node.prototype = Object.create( GraphComponent$$1 && GraphComponent$$1.prototype );
-	  Node.prototype.constructor = Node;
-	  Node.prototype.isIncidentEdgeInResult = function isIncidentEdgeInResult () {
-	    for (var it = this.getEdges().getEdges().iterator(); it.hasNext();) {
-	      var de = it.next();
-	      if (de.getEdge().isInResult()) { return true }
-	    }
-	    return false
-	  };
-	  Node.prototype.isIsolated = function isIsolated () {
-	    return this._label.getGeometryCount() === 1
-	  };
-	  Node.prototype.getCoordinate = function getCoordinate () {
-	    return this._coord
-	  };
-	  Node.prototype.print = function print (out) {
-	    out.println('node ' + this._coord + ' lbl: ' + this._label);
-	  };
-	  Node.prototype.computeIM = function computeIM (im) {};
-	  Node.prototype.computeMergedLocation = function computeMergedLocation (label2, eltIndex) {
-	    var loc = Location.NONE;
-	    loc = this._label.getLocation(eltIndex);
-	    if (!label2.isNull(eltIndex)) {
-	      var nLoc = label2.getLocation(eltIndex);
-	      if (loc !== Location.BOUNDARY) { loc = nLoc; }
-	    }
-	    return loc
-	  };
-	  Node.prototype.setLabel = function setLabel () {
-	    if (arguments.length === 2) {
-	      var argIndex = arguments[0];
-	      var onLocation = arguments[1];
-	      if (this._label === null) {
-	        this._label = new Label(argIndex, onLocation);
-	      } else { this._label.setLocation(argIndex, onLocation); }
-	    } else { return GraphComponent$$1.prototype.setLabel.apply(this, arguments) }
-	  };
-	  Node.prototype.getEdges = function getEdges () {
-	    return this._edges
-	  };
-	  Node.prototype.mergeLabel = function mergeLabel () {
-	    var this$1 = this;
-
-	    if (arguments[0] instanceof Node) {
-	      var n = arguments[0];
-	      this.mergeLabel(n._label);
-	    } else if (arguments[0] instanceof Label) {
-	      var label2 = arguments[0];
-	      for (var i = 0; i < 2; i++) {
-	        var loc = this$1.computeMergedLocation(label2, i);
-	        var thisLoc = this$1._label.getLocation(i);
-	        if (thisLoc === Location.NONE) { this$1._label.setLocation(i, loc); }
-	      }
-	    }
-	  };
-	  Node.prototype.add = function add (e) {
-	    this._edges.insert(e);
-	    e.setNode(this);
-	  };
-	  Node.prototype.setLabelBoundary = function setLabelBoundary (argIndex) {
-	    if (this._label === null) { return null }
-	    var loc = Location.NONE;
-	    if (this._label !== null) { loc = this._label.getLocation(argIndex); }
-	    var newLoc = null;
-	    switch (loc) {
-	      case Location.BOUNDARY:
-	        newLoc = Location.INTERIOR;
-	        break
-	      case Location.INTERIOR:
-	        newLoc = Location.BOUNDARY;
-	        break
-	      default:
-	        newLoc = Location.BOUNDARY;
-	        break
+
+	    if (!onInput) {
+	      context.validator().validate();
 	    }
-	    this._label.setLocation(argIndex, newLoc);
-	  };
-	  Node.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  Node.prototype.getClass = function getClass () {
-	    return Node
-	  };
+	  }
 
-	  return Node;
-	}(GraphComponent));
+	  function revertTags(keys) {
+	    var actions = [];
 
-	var NodeMap = function NodeMap () {
-	  this.nodeMap = new TreeMap();
-	  this.nodeFact = null;
-	  var nodeFact = arguments[0];
-	  this.nodeFact = nodeFact;
-	};
-	NodeMap.prototype.find = function find (coord) {
-	  return this.nodeMap.get(coord)
-	};
-	NodeMap.prototype.addNode = function addNode () {
-	  if (arguments[0] instanceof Coordinate) {
-	    var coord = arguments[0];
-	    var node = this.nodeMap.get(coord);
-	    if (node === null) {
-	      node = this.nodeFact.createNode(coord);
-	      this.nodeMap.put(coord, node);
-	    }
-	    return node
-	  } else if (arguments[0] instanceof Node$1) {
-	    var n = arguments[0];
-	    var node$1 = this.nodeMap.get(n.getCoordinate());
-	    if (node$1 === null) {
-	      this.nodeMap.put(n.getCoordinate(), n);
-	      return n
-	    }
-	    node$1.mergeLabel(n);
-	    return node$1
-	  }
-	};
-	NodeMap.prototype.print = function print (out) {
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var n = it.next();
-	    n.print(out);
-	  }
-	};
-	NodeMap.prototype.iterator = function iterator () {
-	  return this.nodeMap.values().iterator()
-	};
-	NodeMap.prototype.values = function values () {
-	  return this.nodeMap.values()
-	};
-	NodeMap.prototype.getBoundaryNodes = function getBoundaryNodes (geomIndex) {
-	  var bdyNodes = new ArrayList();
-	  for (var i = this.iterator(); i.hasNext();) {
-	    var node = i.next();
-	    if (node.getLabel().getLocation(geomIndex) === Location.BOUNDARY) { bdyNodes.add(node); }
-	  }
-	  return bdyNodes
-	};
-	NodeMap.prototype.add = function add (e) {
-	  var p = e.getCoordinate();
-	  var n = this.addNode(p);
-	  n.add(e);
-	};
-	NodeMap.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	NodeMap.prototype.getClass = function getClass () {
-	  return NodeMap
-	};
+	    for (var i in _entityIDs) {
+	      var entityID = _entityIDs[i];
+	      var original = context.graph().base().entities[entityID];
+	      var changed = {};
 
-	var Quadrant = function Quadrant () {};
+	      for (var j in keys) {
+	        var key = keys[j];
+	        changed[key] = original ? original.tags[key] : undefined;
+	      }
 
-	var staticAccessors$21 = { NE: { configurable: true },NW: { configurable: true },SW: { configurable: true },SE: { configurable: true } };
+	      var entity = context.entity(entityID);
+	      var tags = Object.assign({}, entity.tags); // shallow copy
 
-	Quadrant.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Quadrant.prototype.getClass = function getClass () {
-	  return Quadrant
-	};
-	Quadrant.isNorthern = function isNorthern (quad) {
-	  return quad === Quadrant.NE || quad === Quadrant.NW
-	};
-	Quadrant.isOpposite = function isOpposite (quad1, quad2) {
-	  if (quad1 === quad2) { return false }
-	  var diff = (quad1 - quad2 + 4) % 4;
-	  if (diff === 2) { return true }
-	  return false
-	};
-	Quadrant.commonHalfPlane = function commonHalfPlane (quad1, quad2) {
-	  if (quad1 === quad2) { return quad1 }
-	  var diff = (quad1 - quad2 + 4) % 4;
-	  if (diff === 2) { return -1 }
-	  var min = quad1 < quad2 ? quad1 : quad2;
-	  var max = quad1 > quad2 ? quad1 : quad2;
-	  if (min === 0 && max === 3) { return 3 }
-	  return min
-	};
-	Quadrant.isInHalfPlane = function isInHalfPlane (quad, halfPlane) {
-	  if (halfPlane === Quadrant.SE) {
-	    return quad === Quadrant.SE || quad === Quadrant.SW
-	  }
-	  return quad === halfPlane || quad === halfPlane + 1
-	};
-	Quadrant.quadrant = function quadrant () {
-	  if (typeof arguments[0] === 'number' && typeof arguments[1] === 'number') {
-	    var dx = arguments[0];
-	    var dy = arguments[1];
-	    if (dx === 0.0 && dy === 0.0) { throw new IllegalArgumentException('Cannot compute the quadrant for point ( ' + dx + ', ' + dy + ' )') }
-	    if (dx >= 0.0) {
-	      if (dy >= 0.0) { return Quadrant.NE; } else { return Quadrant.SE }
-	    } else {
-	      if (dy >= 0.0) { return Quadrant.NW; } else { return Quadrant.SW }
-	    }
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Coordinate) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (p1.x === p0.x && p1.y === p0.y) { throw new IllegalArgumentException('Cannot compute the quadrant for two identical points ' + p0) }
-	    if (p1.x >= p0.x) {
-	      if (p1.y >= p0.y) { return Quadrant.NE; } else { return Quadrant.SE }
-	    } else {
-	      if (p1.y >= p0.y) { return Quadrant.NW; } else { return Quadrant.SW }
-	    }
-	  }
-	};
-	staticAccessors$21.NE.get = function () { return 0 };
-	staticAccessors$21.NW.get = function () { return 1 };
-	staticAccessors$21.SW.get = function () { return 2 };
-	staticAccessors$21.SE.get = function () { return 3 };
-
-	Object.defineProperties( Quadrant, staticAccessors$21 );
-
-	var EdgeEnd = function EdgeEnd () {
-	  this._edge = null;
-	  this._label = null;
-	  this._node = null;
-	  this._p0 = null;
-	  this._p1 = null;
-	  this._dx = null;
-	  this._dy = null;
-	  this._quadrant = null;
-	  if (arguments.length === 1) {
-	    var edge = arguments[0];
-	    this._edge = edge;
-	  } else if (arguments.length === 3) {
-	    var edge$1 = arguments[0];
-	    var p0 = arguments[1];
-	    var p1 = arguments[2];
-	    var label = null;
-	    this._edge = edge$1;
-	    this.init(p0, p1);
-	    this._label = label;
-	  } else if (arguments.length === 4) {
-	    var edge$2 = arguments[0];
-	    var p0$1 = arguments[1];
-	    var p1$1 = arguments[2];
-	    var label$1 = arguments[3];
-	    this._edge = edge$2;
-	    this.init(p0$1, p1$1);
-	    this._label = label$1;
-	  }
-	};
-	EdgeEnd.prototype.compareDirection = function compareDirection (e) {
-	  if (this._dx === e._dx && this._dy === e._dy) { return 0 }
-	  if (this._quadrant > e._quadrant) { return 1 }
-	  if (this._quadrant < e._quadrant) { return -1 }
-	  return CGAlgorithms.computeOrientation(e._p0, e._p1, this._p1)
-	};
-	EdgeEnd.prototype.getDy = function getDy () {
-	  return this._dy
-	};
-	EdgeEnd.prototype.getCoordinate = function getCoordinate () {
-	  return this._p0
-	};
-	EdgeEnd.prototype.setNode = function setNode (node) {
-	  this._node = node;
-	};
-	EdgeEnd.prototype.print = function print (out) {
-	  var angle = Math.atan2(this._dy, this._dx);
-	  var className = this.getClass().getName();
-	  var lastDotPos = className.lastIndexOf('.');
-	  var name = className.substring(lastDotPos + 1);
-	  out.print('  ' + name + ': ' + this._p0 + ' - ' + this._p1 + ' ' + this._quadrant + ':' + angle + '   ' + this._label);
-	};
-	EdgeEnd.prototype.compareTo = function compareTo (obj) {
-	  var e = obj;
-	  return this.compareDirection(e)
-	};
-	EdgeEnd.prototype.getDirectedCoordinate = function getDirectedCoordinate () {
-	  return this._p1
-	};
-	EdgeEnd.prototype.getDx = function getDx () {
-	  return this._dx
-	};
-	EdgeEnd.prototype.getLabel = function getLabel () {
-	  return this._label
-	};
-	EdgeEnd.prototype.getEdge = function getEdge () {
-	  return this._edge
-	};
-	EdgeEnd.prototype.getQuadrant = function getQuadrant () {
-	  return this._quadrant
-	};
-	EdgeEnd.prototype.getNode = function getNode () {
-	  return this._node
-	};
-	EdgeEnd.prototype.toString = function toString () {
-	  var angle = Math.atan2(this._dy, this._dx);
-	  var className = this.getClass().getName();
-	  var lastDotPos = className.lastIndexOf('.');
-	  var name = className.substring(lastDotPos + 1);
-	  return '  ' + name + ': ' + this._p0 + ' - ' + this._p1 + ' ' + this._quadrant + ':' + angle + '   ' + this._label
-	};
-	EdgeEnd.prototype.computeLabel = function computeLabel (boundaryNodeRule) {};
-	EdgeEnd.prototype.init = function init (p0, p1) {
-	  this._p0 = p0;
-	  this._p1 = p1;
-	  this._dx = p1.x - p0.x;
-	  this._dy = p1.y - p0.y;
-	  this._quadrant = Quadrant.quadrant(this._dx, this._dy);
-	  Assert.isTrue(!(this._dx === 0 && this._dy === 0), 'EdgeEnd with identical endpoints found');
-	};
-	EdgeEnd.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	EdgeEnd.prototype.getClass = function getClass () {
-	  return EdgeEnd
-	};
+	      for (var k in changed) {
+	        if (!k) continue;
+	        var v = changed[k];
 
-	var DirectedEdge = (function (EdgeEnd$$1) {
-	  function DirectedEdge () {
-	    var edge = arguments[0];
-	    var isForward = arguments[1];
-	    EdgeEnd$$1.call(this, edge);
-	    this._isForward = null;
-	    this._isInResult = false;
-	    this._isVisited = false;
-	    this._sym = null;
-	    this._next = null;
-	    this._nextMin = null;
-	    this._edgeRing = null;
-	    this._minEdgeRing = null;
-	    this._depth = [0, -999, -999];
-	    this._isForward = isForward;
-	    if (isForward) {
-	      this.init(edge.getCoordinate(0), edge.getCoordinate(1));
-	    } else {
-	      var n = edge.getNumPoints() - 1;
-	      this.init(edge.getCoordinate(n), edge.getCoordinate(n - 1));
-	    }
-	    this.computeDirectedLabel();
-	  }
+	        if (v !== undefined || tags.hasOwnProperty(k)) {
+	          tags[k] = v;
+	        }
+	      }
 
-	  if ( EdgeEnd$$1 ) { DirectedEdge.__proto__ = EdgeEnd$$1; }
-	  DirectedEdge.prototype = Object.create( EdgeEnd$$1 && EdgeEnd$$1.prototype );
-	  DirectedEdge.prototype.constructor = DirectedEdge;
-	  DirectedEdge.prototype.getNextMin = function getNextMin () {
-	    return this._nextMin
-	  };
-	  DirectedEdge.prototype.getDepth = function getDepth (position) {
-	    return this._depth[position]
-	  };
-	  DirectedEdge.prototype.setVisited = function setVisited (isVisited) {
-	    this._isVisited = isVisited;
-	  };
-	  DirectedEdge.prototype.computeDirectedLabel = function computeDirectedLabel () {
-	    this._label = new Label(this._edge.getLabel());
-	    if (!this._isForward) { this._label.flip(); }
-	  };
-	  DirectedEdge.prototype.getNext = function getNext () {
-	    return this._next
-	  };
-	  DirectedEdge.prototype.setDepth = function setDepth (position, depthVal) {
-	    if (this._depth[position] !== -999) {
-	      if (this._depth[position] !== depthVal) { throw new TopologyException('assigned depths do not match', this.getCoordinate()) }
+	      tags = utilCleanTags(tags);
+
+	      if (!fastDeepEqual(entity.tags, tags)) {
+	        actions.push(actionChangeTags(entityID, tags));
+	      }
 	    }
-	    this._depth[position] = depthVal;
-	  };
-	  DirectedEdge.prototype.isInteriorAreaEdge = function isInteriorAreaEdge () {
-	    var this$1 = this;
 
-	    var isInteriorAreaEdge = true;
-	    for (var i = 0; i < 2; i++) {
-	      if (!(this$1._label.isArea(i) && this$1._label.getLocation(i, Position.LEFT) === Location.INTERIOR && this$1._label.getLocation(i, Position.RIGHT) === Location.INTERIOR)) {
-	        isInteriorAreaEdge = false;
+	    if (actions.length) {
+	      var combinedAction = function combinedAction(graph) {
+	        actions.forEach(function (action) {
+	          graph = action(graph);
+	        });
+	        return graph;
+	      };
+
+	      var annotation = _t('operations.change_tags.annotation');
+
+	      if (_coalesceChanges) {
+	        context.overwrite(combinedAction, annotation);
+	      } else {
+	        context.perform(combinedAction, annotation);
+	        _coalesceChanges = false;
 	      }
 	    }
-	    return isInteriorAreaEdge
-	  };
-	  DirectedEdge.prototype.setNextMin = function setNextMin (nextMin) {
-	    this._nextMin = nextMin;
-	  };
-	  DirectedEdge.prototype.print = function print (out) {
-	    EdgeEnd$$1.prototype.print.call(this, out);
-	    out.print(' ' + this._depth[Position.LEFT] + '/' + this._depth[Position.RIGHT]);
-	    out.print(' (' + this.getDepthDelta() + ')');
-	    if (this._isInResult) { out.print(' inResult'); }
-	  };
-	  DirectedEdge.prototype.setMinEdgeRing = function setMinEdgeRing (minEdgeRing) {
-	    this._minEdgeRing = minEdgeRing;
-	  };
-	  DirectedEdge.prototype.isLineEdge = function isLineEdge () {
-	    var isLine = this._label.isLine(0) || this._label.isLine(1);
-	    var isExteriorIfArea0 = !this._label.isArea(0) || this._label.allPositionsEqual(0, Location.EXTERIOR);
-	    var isExteriorIfArea1 = !this._label.isArea(1) || this._label.allPositionsEqual(1, Location.EXTERIOR);
-	    return isLine && isExteriorIfArea0 && isExteriorIfArea1
-	  };
-	  DirectedEdge.prototype.setEdgeRing = function setEdgeRing (edgeRing) {
-	    this._edgeRing = edgeRing;
-	  };
-	  DirectedEdge.prototype.getMinEdgeRing = function getMinEdgeRing () {
-	    return this._minEdgeRing
-	  };
-	  DirectedEdge.prototype.getDepthDelta = function getDepthDelta () {
-	    var depthDelta = this._edge.getDepthDelta();
-	    if (!this._isForward) { depthDelta = -depthDelta; }
-	    return depthDelta
-	  };
-	  DirectedEdge.prototype.setInResult = function setInResult (isInResult) {
-	    this._isInResult = isInResult;
-	  };
-	  DirectedEdge.prototype.getSym = function getSym () {
-	    return this._sym
-	  };
-	  DirectedEdge.prototype.isForward = function isForward () {
-	    return this._isForward
-	  };
-	  DirectedEdge.prototype.getEdge = function getEdge () {
-	    return this._edge
-	  };
-	  DirectedEdge.prototype.printEdge = function printEdge (out) {
-	    this.print(out);
-	    out.print(' ');
-	    if (this._isForward) { this._edge.print(out); } else { this._edge.printReverse(out); }
-	  };
-	  DirectedEdge.prototype.setSym = function setSym (de) {
-	    this._sym = de;
-	  };
-	  DirectedEdge.prototype.setVisitedEdge = function setVisitedEdge (isVisited) {
-	    this.setVisited(isVisited);
-	    this._sym.setVisited(isVisited);
-	  };
-	  DirectedEdge.prototype.setEdgeDepths = function setEdgeDepths (position, depth) {
-	    var depthDelta = this.getEdge().getDepthDelta();
-	    if (!this._isForward) { depthDelta = -depthDelta; }
-	    var directionFactor = 1;
-	    if (position === Position.LEFT) { directionFactor = -1; }
-	    var oppositePos = Position.opposite(position);
-	    var delta = depthDelta * directionFactor;
-	    var oppositeDepth = depth + delta;
-	    this.setDepth(position, depth);
-	    this.setDepth(oppositePos, oppositeDepth);
-	  };
-	  DirectedEdge.prototype.getEdgeRing = function getEdgeRing () {
-	    return this._edgeRing
-	  };
-	  DirectedEdge.prototype.isInResult = function isInResult () {
-	    return this._isInResult
-	  };
-	  DirectedEdge.prototype.setNext = function setNext (next) {
-	    this._next = next;
-	  };
-	  DirectedEdge.prototype.isVisited = function isVisited () {
-	    return this._isVisited
+
+	    context.validator().validate();
+	  }
+
+	  entityEditor.modified = function (val) {
+	    if (!arguments.length) return _modified;
+	    _modified = val;
+	    return entityEditor;
 	  };
-	  DirectedEdge.prototype.interfaces_ = function interfaces_ () {
-	    return []
+
+	  entityEditor.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return entityEditor;
 	  };
-	  DirectedEdge.prototype.getClass = function getClass () {
-	    return DirectedEdge
+
+	  entityEditor.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change
+
+	    _entityIDs = val;
+	    _base = context.graph();
+	    _coalesceChanges = false;
+	    loadActivePresets(true);
+	    return entityEditor.modified(false);
 	  };
-	  DirectedEdge.depthFactor = function depthFactor (currLocation, nextLocation) {
-	    if (currLocation === Location.EXTERIOR && nextLocation === Location.INTERIOR) { return 1; } else if (currLocation === Location.INTERIOR && nextLocation === Location.EXTERIOR) { return -1 }
-	    return 0
+
+	  entityEditor.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return entityEditor;
 	  };
 
-	  return DirectedEdge;
-	}(EdgeEnd));
+	  function loadActivePresets(isForNewSelection) {
+	    var graph = context.graph();
+	    var counts = {};
 
-	var NodeFactory = function NodeFactory () {};
+	    for (var i in _entityIDs) {
+	      var entity = graph.hasEntity(_entityIDs[i]);
+	      if (!entity) return;
+	      var match = _mainPresetIndex.match(entity, graph);
+	      if (!counts[match.id]) counts[match.id] = 0;
+	      counts[match.id] += 1;
+	    }
 
-	NodeFactory.prototype.createNode = function createNode (coord) {
-	  return new Node$1(coord, null)
-	};
-	NodeFactory.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	NodeFactory.prototype.getClass = function getClass () {
-	  return NodeFactory
-	};
+	    var matches = Object.keys(counts).sort(function (p1, p2) {
+	      return counts[p2] - counts[p1];
+	    }).map(function (pID) {
+	      return _mainPresetIndex.item(pID);
+	    });
 
-	var PlanarGraph = function PlanarGraph () {
-	  this._edges = new ArrayList();
-	  this._nodes = null;
-	  this._edgeEndList = new ArrayList();
-	  if (arguments.length === 0) {
-	    this._nodes = new NodeMap(new NodeFactory());
-	  } else if (arguments.length === 1) {
-	    var nodeFact = arguments[0];
-	    this._nodes = new NodeMap(nodeFact);
-	  }
-	};
-	PlanarGraph.prototype.printEdges = function printEdges (out) {
-	    var this$1 = this;
+	    if (!isForNewSelection) {
+	      // A "weak" preset doesn't set any tags. (e.g. "Address")
+	      var weakPreset = _activePresets.length === 1 && !_activePresets[0].isFallback() && Object.keys(_activePresets[0].addTags || {}).length === 0; // Don't replace a weak preset with a fallback preset (e.g. "Point")
 
-	  out.println('Edges:');
-	  for (var i = 0; i < this._edges.size(); i++) {
-	    out.println('edge ' + i + ':');
-	    var e = this$1._edges.get(i);
-	    e.print(out);
-	    e.eiList.print(out);
-	  }
-	};
-	PlanarGraph.prototype.find = function find (coord) {
-	  return this._nodes.find(coord)
-	};
-	PlanarGraph.prototype.addNode = function addNode () {
-	  if (arguments[0] instanceof Node$1) {
-	    var node = arguments[0];
-	    return this._nodes.addNode(node)
-	  } else if (arguments[0] instanceof Coordinate) {
-	    var coord = arguments[0];
-	    return this._nodes.addNode(coord)
-	  }
-	};
-	PlanarGraph.prototype.getNodeIterator = function getNodeIterator () {
-	  return this._nodes.iterator()
-	};
-	PlanarGraph.prototype.linkResultDirectedEdges = function linkResultDirectedEdges () {
-	  for (var nodeit = this._nodes.iterator(); nodeit.hasNext();) {
-	    var node = nodeit.next();
-	    node.getEdges().linkResultDirectedEdges();
-	  }
-	};
-	PlanarGraph.prototype.debugPrintln = function debugPrintln (o) {
-	  System.out.println(o);
-	};
-	PlanarGraph.prototype.isBoundaryNode = function isBoundaryNode (geomIndex, coord) {
-	  var node = this._nodes.find(coord);
-	  if (node === null) { return false }
-	  var label = node.getLabel();
-	  if (label !== null && label.getLocation(geomIndex) === Location.BOUNDARY) { return true }
-	  return false
-	};
-	PlanarGraph.prototype.linkAllDirectedEdges = function linkAllDirectedEdges () {
-	  for (var nodeit = this._nodes.iterator(); nodeit.hasNext();) {
-	    var node = nodeit.next();
-	    node.getEdges().linkAllDirectedEdges();
-	  }
-	};
-	PlanarGraph.prototype.matchInSameDirection = function matchInSameDirection (p0, p1, ep0, ep1) {
-	  if (!p0.equals(ep0)) { return false }
-	  if (CGAlgorithms.computeOrientation(p0, p1, ep1) === CGAlgorithms.COLLINEAR && Quadrant.quadrant(p0, p1) === Quadrant.quadrant(ep0, ep1)) { return true }
-	  return false
-	};
-	PlanarGraph.prototype.getEdgeEnds = function getEdgeEnds () {
-	  return this._edgeEndList
-	};
-	PlanarGraph.prototype.debugPrint = function debugPrint (o) {
-	  System.out.print(o);
-	};
-	PlanarGraph.prototype.getEdgeIterator = function getEdgeIterator () {
-	  return this._edges.iterator()
-	};
-	PlanarGraph.prototype.findEdgeInSameDirection = function findEdgeInSameDirection (p0, p1) {
-	    var this$1 = this;
+	      if (weakPreset && matches.length === 1 && matches[0].isFallback()) return;
+	    }
 
-	  for (var i = 0; i < this._edges.size(); i++) {
-	    var e = this$1._edges.get(i);
-	    var eCoord = e.getCoordinates();
-	    if (this$1.matchInSameDirection(p0, p1, eCoord[0], eCoord[1])) { return e }
-	    if (this$1.matchInSameDirection(p0, p1, eCoord[eCoord.length - 1], eCoord[eCoord.length - 2])) { return e }
-	  }
-	  return null
-	};
-	PlanarGraph.prototype.insertEdge = function insertEdge (e) {
-	  this._edges.add(e);
-	};
-	PlanarGraph.prototype.findEdgeEnd = function findEdgeEnd (e) {
-	  for (var i = this.getEdgeEnds().iterator(); i.hasNext();) {
-	    var ee = i.next();
-	    if (ee.getEdge() === e) { return ee }
+	    entityEditor.presets(matches);
 	  }
-	  return null
-	};
-	PlanarGraph.prototype.addEdges = function addEdges (edgesToAdd) {
-	    var this$1 = this;
-
-	  for (var it = edgesToAdd.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    this$1._edges.add(e);
-	    var de1 = new DirectedEdge(e, true);
-	    var de2 = new DirectedEdge(e, false);
-	    de1.setSym(de2);
-	    de2.setSym(de1);
-	    this$1.add(de1);
-	    this$1.add(de2);
-	  }
-	};
-	PlanarGraph.prototype.add = function add (e) {
-	  this._nodes.add(e);
-	  this._edgeEndList.add(e);
-	};
-	PlanarGraph.prototype.getNodes = function getNodes () {
-	  return this._nodes.values()
-	};
-	PlanarGraph.prototype.findEdge = function findEdge (p0, p1) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < this._edges.size(); i++) {
-	    var e = this$1._edges.get(i);
-	    var eCoord = e.getCoordinates();
-	    if (p0.equals(eCoord[0]) && p1.equals(eCoord[1])) { return e }
-	  }
-	  return null
-	};
-	PlanarGraph.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PlanarGraph.prototype.getClass = function getClass () {
-	  return PlanarGraph
-	};
-	PlanarGraph.linkResultDirectedEdges = function linkResultDirectedEdges (nodes) {
-	  for (var nodeit = nodes.iterator(); nodeit.hasNext();) {
-	    var node = nodeit.next();
-	    node.getEdges().linkResultDirectedEdges();
-	  }
-	};
+	  entityEditor.presets = function (val) {
+	    if (!arguments.length) return _activePresets; // don't reload the same preset
 
-	var PolygonBuilder = function PolygonBuilder () {
-	  this._geometryFactory = null;
-	  this._shellList = new ArrayList();
-	  var geometryFactory = arguments[0];
-	  this._geometryFactory = geometryFactory;
-	};
-	PolygonBuilder.prototype.sortShellsAndHoles = function sortShellsAndHoles (edgeRings, shellList, freeHoleList) {
-	  for (var it = edgeRings.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (er.isHole()) {
-	      freeHoleList.add(er);
-	    } else {
-	      shellList.add(er);
+	    if (!utilArrayIdentical(val, _activePresets)) {
+	      _activePresets = val;
 	    }
-	  }
-	};
-	PolygonBuilder.prototype.computePolygons = function computePolygons (shellList) {
-	    var this$1 = this;
 
-	  var resultPolyList = new ArrayList();
-	  for (var it = shellList.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    var poly = er.toPolygon(this$1._geometryFactory);
-	    resultPolyList.add(poly);
-	  }
-	  return resultPolyList
-	};
-	PolygonBuilder.prototype.placeFreeHoles = function placeFreeHoles (shellList, freeHoleList) {
-	    var this$1 = this;
+	    return entityEditor;
+	  };
 
-	  for (var it = freeHoleList.iterator(); it.hasNext();) {
-	    var hole = it.next();
-	    if (hole.getShell() === null) {
-	      var shell = this$1.findEdgeRingContaining(hole, shellList);
-	      if (shell === null) { throw new TopologyException('unable to assign hole to a shell', hole.getCoordinate(0)) }
-	      hole.setShell(shell);
-	    }
-	  }
-	};
-	PolygonBuilder.prototype.buildMinimalEdgeRings = function buildMinimalEdgeRings (maxEdgeRings, shellList, freeHoleList) {
-	    var this$1 = this;
-
-	  var edgeRings = new ArrayList();
-	  for (var it = maxEdgeRings.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (er.getMaxNodeDegree() > 2) {
-	      er.linkDirectedEdgesForMinimalEdgeRings();
-	      var minEdgeRings = er.buildMinimalRings();
-	      var shell = this$1.findShell(minEdgeRings);
-	      if (shell !== null) {
-	        this$1.placePolygonHoles(shell, minEdgeRings);
-	        shellList.add(shell);
-	      } else {
-	        freeHoleList.addAll(minEdgeRings);
+	  return utilRebind(entityEditor, dispatch$1, 'on');
+	}
+
+	function uiPresetList(context) {
+	  var dispatch$1 = dispatch('cancel', 'choose');
+
+	  var _entityIDs;
+
+	  var _currentPresets;
+
+	  var _autofocus = false;
+
+	  function presetList(selection) {
+	    if (!_entityIDs) return;
+	    var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
+	    selection.html('');
+	    var messagewrap = selection.append('div').attr('class', 'header fillL');
+	    var message = messagewrap.append('h3').html(_t.html('inspector.choose'));
+	    messagewrap.append('button').attr('class', 'preset-choose').on('click', function () {
+	      dispatch$1.call('cancel', this);
+	    }).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'));
+
+	    function initialKeydown(d3_event) {
+	      // hack to let delete shortcut work when search is autofocused
+	      if (search.property('value').length === 0 && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        operationDelete(context, _entityIDs)(); // hack to let undo work when search is autofocused
+	      } else if (search.property('value').length === 0 && (d3_event.ctrlKey || d3_event.metaKey) && d3_event.keyCode === utilKeybinding.keyCodes.z) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation();
+	        context.undo();
+	      } else if (!d3_event.ctrlKey && !d3_event.metaKey) {
+	        // don't check for delete/undo hack on future keydown events
+	        select(this).on('keydown', keydown);
+	        keydown.call(this, d3_event);
 	      }
-	    } else {
-	      edgeRings.add(er);
 	    }
-	  }
-	  return edgeRings
-	};
-	PolygonBuilder.prototype.containsPoint = function containsPoint (p) {
-	  for (var it = this._shellList.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (er.containsPoint(p)) { return true }
-	  }
-	  return false
-	};
-	PolygonBuilder.prototype.buildMaximalEdgeRings = function buildMaximalEdgeRings (dirEdges) {
-	    var this$1 = this;
 
-	  var maxEdgeRings = new ArrayList();
-	  for (var it = dirEdges.iterator(); it.hasNext();) {
-	    var de = it.next();
-	    if (de.isInResult() && de.getLabel().isArea()) {
-	      if (de.getEdgeRing() === null) {
-	        var er = new MaximalEdgeRing(de, this$1._geometryFactory);
-	        maxEdgeRings.add(er);
-	        er.setInResult();
+	    function keydown(d3_event) {
+	      // down arrow
+	      if (d3_event.keyCode === utilKeybinding.keyCodes['↓'] && // if insertion point is at the end of the string
+	      search.node().selectionStart === search.property('value').length) {
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation(); // move focus to the first item in the preset list
+
+	        var buttons = list.selectAll('.preset-list-button');
+	        if (!buttons.empty()) buttons.nodes()[0].focus();
 	      }
 	    }
-	  }
-	  return maxEdgeRings
-	};
-	PolygonBuilder.prototype.placePolygonHoles = function placePolygonHoles (shell, minEdgeRings) {
-	  for (var it = minEdgeRings.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (er.isHole()) {
-	      er.setShell(shell);
+
+	    function keypress(d3_event) {
+	      // enter
+	      var value = search.property('value');
+
+	      if (d3_event.keyCode === 13 && // ↩ Return
+	      value.length) {
+	        list.selectAll('.preset-list-item:first-child').each(function (d) {
+	          d.choose.call(this);
+	        });
+	      }
 	    }
-	  }
-	};
-	PolygonBuilder.prototype.getPolygons = function getPolygons () {
-	  var resultPolyList = this.computePolygons(this._shellList);
-	  return resultPolyList
-	};
-	PolygonBuilder.prototype.findEdgeRingContaining = function findEdgeRingContaining (testEr, shellList) {
-	  var testRing = testEr.getLinearRing();
-	  var testEnv = testRing.getEnvelopeInternal();
-	  var testPt = testRing.getCoordinateN(0);
-	  var minShell = null;
-	  var minEnv = null;
-	  for (var it = shellList.iterator(); it.hasNext();) {
-	    var tryShell = it.next();
-	    var tryRing = tryShell.getLinearRing();
-	    var tryEnv = tryRing.getEnvelopeInternal();
-	    if (minShell !== null) { minEnv = minShell.getLinearRing().getEnvelopeInternal(); }
-	    var isContained = false;
-	    if (tryEnv.contains(testEnv) && CGAlgorithms.isPointInRing(testPt, tryRing.getCoordinates())) { isContained = true; }
-	    if (isContained) {
-	      if (minShell === null || minEnv.contains(tryEnv)) {
-	        minShell = tryShell;
-	      }
-	    }
-	  }
-	  return minShell
-	};
-	PolygonBuilder.prototype.findShell = function findShell (minEdgeRings) {
-	  var shellCount = 0;
-	  var shell = null;
-	  for (var it = minEdgeRings.iterator(); it.hasNext();) {
-	    var er = it.next();
-	    if (!er.isHole()) {
-	      shell = er;
-	      shellCount++;
-	    }
-	  }
-	  Assert.isTrue(shellCount <= 1, 'found two shells in MinimalEdgeRing list');
-	  return shell
-	};
-	PolygonBuilder.prototype.add = function add () {
-	  if (arguments.length === 1) {
-	    var graph = arguments[0];
-	    this.add(graph.getEdgeEnds(), graph.getNodes());
-	  } else if (arguments.length === 2) {
-	    var dirEdges = arguments[0];
-	    var nodes = arguments[1];
-	    PlanarGraph.linkResultDirectedEdges(nodes);
-	    var maxEdgeRings = this.buildMaximalEdgeRings(dirEdges);
-	    var freeHoleList = new ArrayList();
-	    var edgeRings = this.buildMinimalEdgeRings(maxEdgeRings, this._shellList, freeHoleList);
-	    this.sortShellsAndHoles(edgeRings, this._shellList, freeHoleList);
-	    this.placeFreeHoles(this._shellList, freeHoleList);
-	  }
-	};
-	PolygonBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PolygonBuilder.prototype.getClass = function getClass () {
-	  return PolygonBuilder
-	};
 
-	var Boundable = function Boundable () {};
+	    function inputevent() {
+	      var value = search.property('value');
+	      list.classed('filtered', value.length);
+	      var extent = combinedEntityExtent();
+	      var results, messageText;
 
-	Boundable.prototype.getBounds = function getBounds () {};
-	Boundable.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Boundable.prototype.getClass = function getClass () {
-	  return Boundable
-	};
+	      if (value.length && extent) {
+	        var center = extent.center();
+	        var countryCode = iso1A2Code(center);
+	        results = presets.search(value, entityGeometries()[0], countryCode && countryCode.toLowerCase());
+	        messageText = _t('inspector.results', {
+	          n: results.collection.length,
+	          search: value
+	        });
+	      } else {
+	        results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro());
+	        messageText = _t('inspector.choose');
+	      }
 
-	var ItemBoundable = function ItemBoundable () {
-	  this._bounds = null;
-	  this._item = null;
-	  var bounds = arguments[0];
-	  var item = arguments[1];
-	  this._bounds = bounds;
-	  this._item = item;
-	};
-	ItemBoundable.prototype.getItem = function getItem () {
-	  return this._item
-	};
-	ItemBoundable.prototype.getBounds = function getBounds () {
-	  return this._bounds
-	};
-	ItemBoundable.prototype.interfaces_ = function interfaces_ () {
-	  return [Boundable, Serializable]
-	};
-	ItemBoundable.prototype.getClass = function getClass () {
-	  return ItemBoundable
-	};
+	      list.call(drawList, results);
+	      message.html(messageText);
+	    }
 
-	var PriorityQueue = function PriorityQueue () {
-	  this._size = null;
-	  this._items = null;
-	  this._size = 0;
-	  this._items = new ArrayList();
-	  this._items.add(null);
-	};
-	PriorityQueue.prototype.poll = function poll () {
-	  if (this.isEmpty()) { return null }
-	  var minItem = this._items.get(1);
-	  this._items.set(1, this._items.get(this._size));
-	  this._size -= 1;
-	  this.reorder(1);
-	  return minItem
-	};
-	PriorityQueue.prototype.size = function size () {
-	  return this._size
-	};
-	PriorityQueue.prototype.reorder = function reorder (hole) {
-	    var this$1 = this;
+	    var searchWrap = selection.append('div').attr('class', 'search-header');
+	    searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
+	    var search = searchWrap.append('input').attr('class', 'preset-search-input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keydown', initialKeydown).on('keypress', keypress).on('input', inputevent);
 
-	  var child = null;
-	  var tmp = this._items.get(hole);
-	  for (; hole * 2 <= this._size; hole = child) {
-	    child = hole * 2;
-	    if (child !== this$1._size && this$1._items.get(child + 1).compareTo(this$1._items.get(child)) < 0) { child++; }
-	    if (this$1._items.get(child).compareTo(tmp) < 0) { this$1._items.set(hole, this$1._items.get(child)); } else { break }
-	  }
-	  this._items.set(hole, tmp);
-	};
-	PriorityQueue.prototype.clear = function clear () {
-	  this._size = 0;
-	  this._items.clear();
-	};
-	PriorityQueue.prototype.isEmpty = function isEmpty () {
-	  return this._size === 0
-	};
-	PriorityQueue.prototype.add = function add (x) {
-	    var this$1 = this;
+	    if (_autofocus) {
+	      search.node().focus(); // Safari 14 doesn't always like to focus immediately,
+	      // so try again on the next pass
+
+	      setTimeout(function () {
+	        search.node().focus();
+	      }, 0);
+	    }
 
-	  this._items.add(null);
-	  this._size += 1;
-	  var hole = this._size;
-	  this._items.set(0, x);
-	  for (; x.compareTo(this._items.get(Math.trunc(hole / 2))) < 0; hole /= 2) {
-	    this$1._items.set(hole, this$1._items.get(Math.trunc(hole / 2)));
+	    var listWrap = selection.append('div').attr('class', 'inspector-body');
+	    var list = listWrap.append('div').attr('class', 'preset-list').call(drawList, _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro()));
+	    context.features().on('change.preset-list', updateForFeatureHiddenState);
 	  }
-	  this._items.set(hole, x);
-	};
-	PriorityQueue.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PriorityQueue.prototype.getClass = function getClass () {
-	  return PriorityQueue
-	};
 
-	var ItemVisitor = function ItemVisitor () {};
+	  function drawList(list, presets) {
+	    presets = presets.matchAllGeometry(entityGeometries());
+	    var collection = presets.collection.reduce(function (collection, preset) {
+	      if (!preset) return collection;
 
-	ItemVisitor.prototype.visitItem = function visitItem (item) {};
-	ItemVisitor.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	ItemVisitor.prototype.getClass = function getClass () {
-	  return ItemVisitor
-	};
+	      if (preset.members) {
+	        if (preset.members.collection.filter(function (preset) {
+	          return preset.addable();
+	        }).length > 1) {
+	          collection.push(CategoryItem(preset));
+	        }
+	      } else if (preset.addable()) {
+	        collection.push(PresetItem(preset));
+	      }
 
-	var SpatialIndex = function SpatialIndex () {};
+	      return collection;
+	    }, []);
+	    var items = list.selectAll('.preset-list-item').data(collection, function (d) {
+	      return d.preset.id;
+	    });
+	    items.order();
+	    items.exit().remove();
+	    items.enter().append('div').attr('class', function (item) {
+	      return 'preset-list-item preset-' + item.preset.id.replace('/', '-');
+	    }).classed('current', function (item) {
+	      return _currentPresets.indexOf(item.preset) !== -1;
+	    }).each(function (item) {
+	      select(this).call(item);
+	    }).style('opacity', 0).transition().style('opacity', 1);
+	    updateForFeatureHiddenState();
+	  }
+
+	  function itemKeydown(d3_event) {
+	    // the actively focused item
+	    var item = select(this.closest('.preset-list-item'));
+	    var parentItem = select(item.node().parentNode.closest('.preset-list-item')); // arrow down, move focus to the next, lower item
+
+	    if (d3_event.keyCode === utilKeybinding.keyCodes['↓']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // the next item in the list at the same level
+
+	      var nextItem = select(item.node().nextElementSibling); // if there is no next item in this list
+
+	      if (nextItem.empty()) {
+	        // if there is a parent item
+	        if (!parentItem.empty()) {
+	          // the item is the last item of a sublist,
+	          // select the next item at the parent level
+	          nextItem = select(parentItem.node().nextElementSibling);
+	        } // if the focused item is expanded
+
+	      } else if (select(this).classed('expanded')) {
+	        // select the first subitem instead
+	        nextItem = item.select('.subgrid .preset-list-item:first-child');
+	      }
 
-	SpatialIndex.prototype.insert = function insert (itemEnv, item) {};
-	SpatialIndex.prototype.remove = function remove (itemEnv, item) {};
-	SpatialIndex.prototype.query = function query () {
-	  // if (arguments.length === 1) {
-	  // const searchEnv = arguments[0]
-	  // } else if (arguments.length === 2) {
-	  // const searchEnv = arguments[0]
-	  // const visitor = arguments[1]
-	  // }
-	};
-	SpatialIndex.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SpatialIndex.prototype.getClass = function getClass () {
-	  return SpatialIndex
-	};
+	      if (!nextItem.empty()) {
+	        // focus on the next item
+	        nextItem.select('.preset-list-button').node().focus();
+	      } // arrow up, move focus to the previous, higher item
 
-	var AbstractNode = function AbstractNode () {
-	  this._childBoundables = new ArrayList();
-	  this._bounds = null;
-	  this._level = null;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var level = arguments[0];
-	    this._level = level;
-	  }
-	};
+	    } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // the previous item in the list at the same level
 
-	var staticAccessors$22 = { serialVersionUID: { configurable: true } };
-	AbstractNode.prototype.getLevel = function getLevel () {
-	  return this._level
-	};
-	AbstractNode.prototype.size = function size () {
-	  return this._childBoundables.size()
-	};
-	AbstractNode.prototype.getChildBoundables = function getChildBoundables () {
-	  return this._childBoundables
-	};
-	AbstractNode.prototype.addChildBoundable = function addChildBoundable (childBoundable) {
-	  Assert.isTrue(this._bounds === null);
-	  this._childBoundables.add(childBoundable);
-	};
-	AbstractNode.prototype.isEmpty = function isEmpty () {
-	  return this._childBoundables.isEmpty()
-	};
-	AbstractNode.prototype.getBounds = function getBounds () {
-	  if (this._bounds === null) {
-	    this._bounds = this.computeBounds();
-	  }
-	  return this._bounds
-	};
-	AbstractNode.prototype.interfaces_ = function interfaces_ () {
-	  return [Boundable, Serializable]
-	};
-	AbstractNode.prototype.getClass = function getClass () {
-	  return AbstractNode
-	};
-	staticAccessors$22.serialVersionUID.get = function () { return 6493722185909573708 };
+	      var previousItem = select(item.node().previousElementSibling); // if there is no previous item in this list
 
-	Object.defineProperties( AbstractNode, staticAccessors$22 );
+	      if (previousItem.empty()) {
+	        // if there is a parent item
+	        if (!parentItem.empty()) {
+	          // the item is the first subitem of a sublist select the parent item
+	          previousItem = parentItem;
+	        } // if the previous item is expanded
 
-	var Collections = function Collections () {};
+	      } else if (previousItem.select('.preset-list-button').classed('expanded')) {
+	        // select the last subitem of the sublist of the previous item
+	        previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
+	      }
 
-	Collections.reverseOrder = function reverseOrder () {
-	  return {
-	    compare: function compare (a, b) {
-	      return b.compareTo(a)
-	    }
-	  }
-	};
-	Collections.min = function min (l) {
-	  Collections.sort(l);
-	  return l.get(0)
-	};
-	Collections.sort = function sort (l, c) {
-	  var a = l.toArray();
-	  if (c) {
-	    Arrays.sort(a, c);
-	  } else {
-	    Arrays.sort(a);
-	  }
-	  var i = l.iterator();
-	  for (var pos = 0, alen = a.length; pos < alen; pos++) {
-	    i.next();
-	    i.set(a[pos]);
-	  }
-	};
-	Collections.singletonList = function singletonList (o) {
-	  var arrayList = new ArrayList();
-	  arrayList.add(o);
-	  return arrayList
-	};
+	      if (!previousItem.empty()) {
+	        // focus on the previous item
+	        previousItem.select('.preset-list-button').node().focus();
+	      } else {
+	        // the focus is at the top of the list, move focus back to the search field
+	        var search = select(this.closest('.preset-list-pane')).select('.preset-search-input');
+	        search.node().focus();
+	      } // arrow left, move focus to the parent item if there is one
 
-	var BoundablePair = function BoundablePair () {
-	  this._boundable1 = null;
-	  this._boundable2 = null;
-	  this._distance = null;
-	  this._itemDistance = null;
-	  var boundable1 = arguments[0];
-	  var boundable2 = arguments[1];
-	  var itemDistance = arguments[2];
-	  this._boundable1 = boundable1;
-	  this._boundable2 = boundable2;
-	  this._itemDistance = itemDistance;
-	  this._distance = this.distance();
-	};
-	BoundablePair.prototype.expandToQueue = function expandToQueue (priQ, minDistance) {
-	  var isComp1 = BoundablePair.isComposite(this._boundable1);
-	  var isComp2 = BoundablePair.isComposite(this._boundable2);
-	  if (isComp1 && isComp2) {
-	    if (BoundablePair.area(this._boundable1) > BoundablePair.area(this._boundable2)) {
-	      this.expand(this._boundable1, this._boundable2, priQ, minDistance);
-	      return null
-	    } else {
-	      this.expand(this._boundable2, this._boundable1, priQ, minDistance);
-	      return null
-	    }
-	  } else if (isComp1) {
-	    this.expand(this._boundable1, this._boundable2, priQ, minDistance);
-	    return null
-	  } else if (isComp2) {
-	    this.expand(this._boundable2, this._boundable1, priQ, minDistance);
-	    return null
-	  }
-	  throw new IllegalArgumentException('neither boundable is composite')
-	};
-	BoundablePair.prototype.isLeaves = function isLeaves () {
-	  return !(BoundablePair.isComposite(this._boundable1) || BoundablePair.isComposite(this._boundable2))
-	};
-	BoundablePair.prototype.compareTo = function compareTo (o) {
-	  var nd = o;
-	  if (this._distance < nd._distance) { return -1 }
-	  if (this._distance > nd._distance) { return 1 }
-	  return 0
-	};
-	BoundablePair.prototype.expand = function expand (bndComposite, bndOther, priQ, minDistance) {
-	    var this$1 = this;
+	    } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // if there is a parent item, focus on the parent item
 
-	  var children = bndComposite.getChildBoundables();
-	  for (var i = children.iterator(); i.hasNext();) {
-	    var child = i.next();
-	    var bp = new BoundablePair(child, bndOther, this$1._itemDistance);
-	    if (bp.getDistance() < minDistance) {
-	      priQ.add(bp);
+	      if (!parentItem.empty()) {
+	        parentItem.select('.preset-list-button').node().focus();
+	      } // arrow right, choose this item
+
+	    } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      item.datum().choose.call(select(this).node());
 	    }
 	  }
-	};
-	BoundablePair.prototype.getBoundable = function getBoundable (i) {
-	  if (i === 0) { return this._boundable1 }
-	  return this._boundable2
-	};
-	BoundablePair.prototype.getDistance = function getDistance () {
-	  return this._distance
-	};
-	BoundablePair.prototype.distance = function distance () {
-	  if (this.isLeaves()) {
-	    return this._itemDistance.distance(this._boundable1, this._boundable2)
-	  }
-	  return this._boundable1.getBounds().distance(this._boundable2.getBounds())
-	};
-	BoundablePair.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	BoundablePair.prototype.getClass = function getClass () {
-	  return BoundablePair
-	};
-	BoundablePair.area = function area (b) {
-	  return b.getBounds().getArea()
-	};
-	BoundablePair.isComposite = function isComposite (item) {
-	  return item instanceof AbstractNode
-	};
 
-	var AbstractSTRtree = function AbstractSTRtree () {
-	  this._root = null;
-	  this._built = false;
-	  this._itemBoundables = new ArrayList();
-	  this._nodeCapacity = null;
-	  if (arguments.length === 0) {
-	    var nodeCapacity = AbstractSTRtree.DEFAULT_NODE_CAPACITY;
-	    this._nodeCapacity = nodeCapacity;
-	  } else if (arguments.length === 1) {
-	    var nodeCapacity$1 = arguments[0];
-	    Assert.isTrue(nodeCapacity$1 > 1, 'Node capacity must be greater than 1');
-	    this._nodeCapacity = nodeCapacity$1;
-	  }
-	};
+	  function CategoryItem(preset) {
+	    var box,
+	        sublist,
+	        shown = false;
 
-	var staticAccessors$23 = { IntersectsOp: { configurable: true },serialVersionUID: { configurable: true },DEFAULT_NODE_CAPACITY: { configurable: true } };
-	AbstractSTRtree.prototype.getNodeCapacity = function getNodeCapacity () {
-	  return this._nodeCapacity
-	};
-	AbstractSTRtree.prototype.lastNode = function lastNode (nodes) {
-	  return nodes.get(nodes.size() - 1)
-	};
-	AbstractSTRtree.prototype.size = function size () {
-	    var this$1 = this;
+	    function item(selection) {
+	      var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');
 
-	  if (arguments.length === 0) {
-	    if (this.isEmpty()) {
-	      return 0
-	    }
-	    this.build();
-	    return this.size(this._root)
-	  } else if (arguments.length === 1) {
-	    var node = arguments[0];
-	    var size = 0;
-	    for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (childBoundable instanceof AbstractNode) {
-	        size += this$1.size(childBoundable);
-	      } else if (childBoundable instanceof ItemBoundable) {
-	        size += 1;
-	      }
-	    }
-	    return size
-	  }
-	};
-	AbstractSTRtree.prototype.removeItem = function removeItem (node, item) {
-	  var childToRemove = null;
-	  for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	    var childBoundable = i.next();
-	    if (childBoundable instanceof ItemBoundable) {
-	      if (childBoundable.getItem() === item) { childToRemove = childBoundable; }
-	    }
-	  }
-	  if (childToRemove !== null) {
-	    node.getChildBoundables().remove(childToRemove);
-	    return true
-	  }
-	  return false
-	};
-	AbstractSTRtree.prototype.itemsTree = function itemsTree () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    this.build();
-	    var valuesTree = this.itemsTree(this._root);
-	    if (valuesTree === null) { return new ArrayList() }
-	    return valuesTree
-	  } else if (arguments.length === 1) {
-	    var node = arguments[0];
-	    var valuesTreeForNode = new ArrayList();
-	    for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (childBoundable instanceof AbstractNode) {
-	        var valuesTreeForChild = this$1.itemsTree(childBoundable);
-	        if (valuesTreeForChild !== null) { valuesTreeForNode.add(valuesTreeForChild); }
-	      } else if (childBoundable instanceof ItemBoundable) {
-	        valuesTreeForNode.add(childBoundable.getItem());
-	      } else {
-	        Assert.shouldNeverReachHere();
+	      function click() {
+	        var isExpanded = select(this).classed('expanded');
+	        var iconName = isExpanded ? _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward' : '#iD-icon-down';
+	        select(this).classed('expanded', !isExpanded);
+	        select(this).selectAll('div.label-inner svg.icon use').attr('href', iconName);
+	        item.choose();
 	      }
-	    }
-	    if (valuesTreeForNode.size() <= 0) { return null }
-	    return valuesTreeForNode
-	  }
-	};
-	AbstractSTRtree.prototype.insert = function insert (bounds, item) {
-	  Assert.isTrue(!this._built, 'Cannot insert items into an STR packed R-tree after it has been built.');
-	  this._itemBoundables.add(new ItemBoundable(bounds, item));
-	};
-	AbstractSTRtree.prototype.boundablesAtLevel = function boundablesAtLevel () {
-	    var this$1 = this;
 
-	  if (arguments.length === 1) {
-	    var level = arguments[0];
-	    var boundables = new ArrayList();
-	    this.boundablesAtLevel(level, this._root, boundables);
-	    return boundables
-	  } else if (arguments.length === 3) {
-	    var level$1 = arguments[0];
-	    var top = arguments[1];
-	    var boundables$1 = arguments[2];
-	    Assert.isTrue(level$1 > -2);
-	    if (top.getLevel() === level$1) {
-	      boundables$1.add(top);
-	      return null
-	    }
-	    for (var i = top.getChildBoundables().iterator(); i.hasNext();) {
-	      var boundable = i.next();
-	      if (boundable instanceof AbstractNode) {
-	        this$1.boundablesAtLevel(level$1, boundable, boundables$1);
-	      } else {
-	        Assert.isTrue(boundable instanceof ItemBoundable);
-	        if (level$1 === -1) {
-	          boundables$1.add(boundable);
+	      var geometries = entityGeometries();
+	      var button = wrap.append('button').attr('class', 'preset-list-button').classed('expanded', false).call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', click).on('keydown', function (d3_event) {
+	        // right arrow, expand the focused item
+	        if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation(); // if the item isn't expanded
+
+	          if (!select(this).classed('expanded')) {
+	            // toggle expansion (expand the item)
+	            click.call(this, d3_event);
+	          } // left arrow, collapse the focused item
+
+	        } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation(); // if the item is expanded
+
+	          if (select(this).classed('expanded')) {
+	            // toggle expansion (collapse the item)
+	            click.call(this, d3_event);
+	          }
+	        } else {
+	          itemKeydown.call(this, d3_event);
 	        }
-	      }
+	      });
+	      var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+	      label.append('div').attr('class', 'namepart').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline')).append('span').html(function () {
+	        return preset.nameLabel() + '&hellip;';
+	      });
+	      box = selection.append('div').attr('class', 'subgrid').style('max-height', '0px').style('opacity', 0);
+	      box.append('div').attr('class', 'arrow');
+	      sublist = box.append('div').attr('class', 'preset-list fillL3');
 	    }
-	    return null
-	  }
-	};
-	AbstractSTRtree.prototype.query = function query () {
-	    var this$1 = this;
 
-	  if (arguments.length === 1) {
-	    var searchBounds = arguments[0];
-	    this.build();
-	    var matches = new ArrayList();
-	    if (this.isEmpty()) {
-	      return matches
-	    }
-	    if (this.getIntersectsOp().intersects(this._root.getBounds(), searchBounds)) {
-	      this.query(searchBounds, this._root, matches);
-	    }
-	    return matches
-	  } else if (arguments.length === 2) {
-	    var searchBounds$1 = arguments[0];
-	    var visitor = arguments[1];
-	    this.build();
-	    if (this.isEmpty()) {
-	      return null
-	    }
-	    if (this.getIntersectsOp().intersects(this._root.getBounds(), searchBounds$1)) {
-	      this.query(searchBounds$1, this._root, visitor);
-	    }
-	  } else if (arguments.length === 3) {
-	    if (hasInterface(arguments[2], ItemVisitor) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-	      var searchBounds$2 = arguments[0];
-	      var node = arguments[1];
-	      var visitor$1 = arguments[2];
-	      var childBoundables = node.getChildBoundables();
-	      for (var i = 0; i < childBoundables.size(); i++) {
-	        var childBoundable = childBoundables.get(i);
-	        if (!this$1.getIntersectsOp().intersects(childBoundable.getBounds(), searchBounds$2)) {
-	          continue
-	        }
-	        if (childBoundable instanceof AbstractNode) {
-	          this$1.query(searchBounds$2, childBoundable, visitor$1);
-	        } else if (childBoundable instanceof ItemBoundable) {
-	          visitor$1.visitItem(childBoundable.getItem());
-	        } else {
-	          Assert.shouldNeverReachHere();
-	        }
-	      }
-	    } else if (hasInterface(arguments[2], List) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-	      var searchBounds$3 = arguments[0];
-	      var node$1 = arguments[1];
-	      var matches$1 = arguments[2];
-	      var childBoundables$1 = node$1.getChildBoundables();
-	      for (var i$1 = 0; i$1 < childBoundables$1.size(); i$1++) {
-	        var childBoundable$1 = childBoundables$1.get(i$1);
-	        if (!this$1.getIntersectsOp().intersects(childBoundable$1.getBounds(), searchBounds$3)) {
-	          continue
-	        }
-	        if (childBoundable$1 instanceof AbstractNode) {
-	          this$1.query(searchBounds$3, childBoundable$1, matches$1);
-	        } else if (childBoundable$1 instanceof ItemBoundable) {
-	          matches$1.add(childBoundable$1.getItem());
-	        } else {
-	          Assert.shouldNeverReachHere();
-	        }
+	    item.choose = function () {
+	      if (!box || !sublist) return;
+
+	      if (shown) {
+	        shown = false;
+	        box.transition().duration(200).style('opacity', '0').style('max-height', '0px').style('padding-bottom', '0px');
+	      } else {
+	        shown = true;
+	        var members = preset.members.matchAllGeometry(entityGeometries());
+	        sublist.call(drawList, members);
+	        box.transition().duration(200).style('opacity', '1').style('max-height', 200 + members.collection.length * 190 + 'px').style('padding-bottom', '10px');
 	      }
-	    }
+	    };
+
+	    item.preset = preset;
+	    return item;
 	  }
-	};
-	AbstractSTRtree.prototype.build = function build () {
-	  if (this._built) { return null }
-	  this._root = this._itemBoundables.isEmpty() ? this.createNode(0) : this.createHigherLevels(this._itemBoundables, -1);
-	  this._itemBoundables = null;
-	  this._built = true;
-	};
-	AbstractSTRtree.prototype.getRoot = function getRoot () {
-	  this.build();
-	  return this._root
-	};
-	AbstractSTRtree.prototype.remove = function remove () {
-	    var this$1 = this;
 
-	  if (arguments.length === 2) {
-	    var searchBounds = arguments[0];
-	    var item = arguments[1];
-	    this.build();
-	    if (this.getIntersectsOp().intersects(this._root.getBounds(), searchBounds)) {
-	      return this.remove(searchBounds, this._root, item)
+	  function PresetItem(preset) {
+	    function item(selection) {
+	      var wrap = selection.append('div').attr('class', 'preset-list-button-wrap');
+	      var geometries = entityGeometries();
+	      var button = wrap.append('button').attr('class', 'preset-list-button').call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', item.choose).on('keydown', itemKeydown);
+	      var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+	      var nameparts = [preset.nameLabel(), preset.subtitleLabel()].filter(Boolean);
+	      label.selectAll('.namepart').data(nameparts).enter().append('div').attr('class', 'namepart').html(function (d) {
+	        return d;
+	      });
+	      wrap.call(item.reference.button);
+	      selection.call(item.reference.body);
 	    }
-	    return false
-	  } else if (arguments.length === 3) {
-	    var searchBounds$1 = arguments[0];
-	    var node = arguments[1];
-	    var item$1 = arguments[2];
-	    var found = this.removeItem(node, item$1);
-	    if (found) { return true }
-	    var childToPrune = null;
-	    for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (!this$1.getIntersectsOp().intersects(childBoundable.getBounds(), searchBounds$1)) {
-	        continue
+
+	    item.choose = function () {
+	      if (select(this).classed('disabled')) return;
+
+	      if (!context.inIntro()) {
+	        _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
 	      }
-	      if (childBoundable instanceof AbstractNode) {
-	        found = this$1.remove(searchBounds$1, childBoundable, item$1);
-	        if (found) {
-	          childToPrune = childBoundable;
-	          break
+
+	      context.perform(function (graph) {
+	        for (var i in _entityIDs) {
+	          var entityID = _entityIDs[i];
+	          var oldPreset = _mainPresetIndex.match(graph.entity(entityID), graph);
+	          graph = actionChangePreset(entityID, oldPreset, preset)(graph);
 	        }
+
+	        return graph;
+	      }, _t('operations.change_tags.annotation'));
+	      context.validator().validate(); // rerun validation
+
+	      dispatch$1.call('choose', this, preset);
+	    };
+
+	    item.help = function (d3_event) {
+	      d3_event.stopPropagation();
+	      item.reference.toggle();
+	    };
+
+	    item.preset = preset;
+	    item.reference = uiTagReference(preset.reference());
+	    return item;
+	  }
+
+	  function updateForFeatureHiddenState() {
+	    if (!_entityIDs.every(context.hasEntity)) return;
+	    var geometries = entityGeometries();
+	    var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips
+
+	    button.call(uiTooltip().destroyAny);
+	    button.each(function (item, index) {
+	      var hiddenPresetFeaturesId;
+
+	      for (var i in geometries) {
+	        hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
+	        if (hiddenPresetFeaturesId) break;
 	      }
-	    }
-	    if (childToPrune !== null) {
-	      if (childToPrune.getChildBoundables().isEmpty()) {
-	        node.getChildBoundables().remove(childToPrune);
+
+	      var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
+	      select(this).classed('disabled', isHiddenPreset);
+
+	      if (isHiddenPreset) {
+	        var isAutoHidden = context.features().autoHidden(hiddenPresetFeaturesId);
+	        select(this).call(uiTooltip().title(_t.html('inspector.hidden_preset.' + (isAutoHidden ? 'zoom' : 'manual'), {
+	          features: _t.html('feature.' + hiddenPresetFeaturesId + '.description')
+	        })).placement(index < 2 ? 'bottom' : 'top'));
 	      }
-	    }
-	    return found
-	  }
-	};
-	AbstractSTRtree.prototype.createHigherLevels = function createHigherLevels (boundablesOfALevel, level) {
-	  Assert.isTrue(!boundablesOfALevel.isEmpty());
-	  var parentBoundables = this.createParentBoundables(boundablesOfALevel, level + 1);
-	  if (parentBoundables.size() === 1) {
-	    return parentBoundables.get(0)
+	    });
 	  }
-	  return this.createHigherLevels(parentBoundables, level + 1)
-	};
-	AbstractSTRtree.prototype.depth = function depth () {
-	    var this$1 = this;
 
-	  if (arguments.length === 0) {
-	    if (this.isEmpty()) {
-	      return 0
+	  presetList.autofocus = function (val) {
+	    if (!arguments.length) return _autofocus;
+	    _autofocus = val;
+	    return presetList;
+	  };
+
+	  presetList.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+
+	    if (_entityIDs && _entityIDs.length) {
+	      var presets = _entityIDs.map(function (entityID) {
+	        return _mainPresetIndex.match(context.entity(entityID), context.graph());
+	      });
+
+	      presetList.presets(presets);
 	    }
-	    this.build();
-	    return this.depth(this._root)
-	  } else if (arguments.length === 1) {
-	    var node = arguments[0];
-	    var maxChildDepth = 0;
-	    for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (childBoundable instanceof AbstractNode) {
-	        var childDepth = this$1.depth(childBoundable);
-	        if (childDepth > maxChildDepth) { maxChildDepth = childDepth; }
+
+	    return presetList;
+	  };
+
+	  presetList.presets = function (val) {
+	    if (!arguments.length) return _currentPresets;
+	    _currentPresets = val;
+	    return presetList;
+	  };
+
+	  function entityGeometries() {
+	    var counts = {};
+
+	    for (var i in _entityIDs) {
+	      var entityID = _entityIDs[i];
+	      var entity = context.entity(entityID);
+	      var geometry = entity.geometry(context.graph()); // Treat entities on addr:interpolation lines as points, not vertices (#3241)
+
+	      if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
+	        geometry = 'point';
 	      }
+
+	      if (!counts[geometry]) counts[geometry] = 0;
+	      counts[geometry] += 1;
 	    }
-	    return maxChildDepth + 1
+
+	    return Object.keys(counts).sort(function (geom1, geom2) {
+	      return counts[geom2] - counts[geom1];
+	    });
 	  }
-	};
-	AbstractSTRtree.prototype.createParentBoundables = function createParentBoundables (childBoundables, newLevel) {
-	    var this$1 = this;
-
-	  Assert.isTrue(!childBoundables.isEmpty());
-	  var parentBoundables = new ArrayList();
-	  parentBoundables.add(this.createNode(newLevel));
-	  var sortedChildBoundables = new ArrayList(childBoundables);
-	  Collections.sort(sortedChildBoundables, this.getComparator());
-	  for (var i = sortedChildBoundables.iterator(); i.hasNext();) {
-	    var childBoundable = i.next();
-	    if (this$1.lastNode(parentBoundables).getChildBoundables().size() === this$1.getNodeCapacity()) {
-	      parentBoundables.add(this$1.createNode(newLevel));
-	    }
-	    this$1.lastNode(parentBoundables).addChildBoundable(childBoundable);
-	  }
-	  return parentBoundables
-	};
-	AbstractSTRtree.prototype.isEmpty = function isEmpty () {
-	  if (!this._built) { return this._itemBoundables.isEmpty() }
-	  return this._root.isEmpty()
-	};
-	AbstractSTRtree.prototype.interfaces_ = function interfaces_ () {
-	  return [Serializable]
-	};
-	AbstractSTRtree.prototype.getClass = function getClass () {
-	  return AbstractSTRtree
-	};
-	AbstractSTRtree.compareDoubles = function compareDoubles (a, b) {
-	  return a > b ? 1 : a < b ? -1 : 0
-	};
-	staticAccessors$23.IntersectsOp.get = function () { return IntersectsOp };
-	staticAccessors$23.serialVersionUID.get = function () { return -3886435814360241337 };
-	staticAccessors$23.DEFAULT_NODE_CAPACITY.get = function () { return 10 };
 
-	Object.defineProperties( AbstractSTRtree, staticAccessors$23 );
+	  function combinedEntityExtent() {
+	    return _entityIDs.reduce(function (extent, entityID) {
+	      var entity = context.graph().entity(entityID);
+	      return extent.extend(entity.extent(context.graph()));
+	    }, geoExtent());
+	  }
+
+	  return utilRebind(presetList, dispatch$1, 'on');
+	}
+
+	function uiInspector(context) {
+	  var presetList = uiPresetList(context);
+	  var entityEditor = uiEntityEditor(context);
+	  var wrap = select(null),
+	      presetPane = select(null),
+	      editorPane = select(null);
+	  var _state = 'select';
+
+	  var _entityIDs;
+
+	  var _newFeature = false;
+
+	  function inspector(selection) {
+	    presetList.entityIDs(_entityIDs).autofocus(_newFeature).on('choose', inspector.setPreset).on('cancel', function () {
+	      inspector.setPreset();
+	    });
+	    entityEditor.state(_state).entityIDs(_entityIDs).on('choose', inspector.showList);
+	    wrap = selection.selectAll('.panewrap').data([0]);
+	    var enter = wrap.enter().append('div').attr('class', 'panewrap');
+	    enter.append('div').attr('class', 'preset-list-pane pane');
+	    enter.append('div').attr('class', 'entity-editor-pane pane');
+	    wrap = wrap.merge(enter);
+	    presetPane = wrap.selectAll('.preset-list-pane');
+	    editorPane = wrap.selectAll('.entity-editor-pane');
+
+	    function shouldDefaultToPresetList() {
+	      // always show the inspector on hover
+	      if (_state !== 'select') return false; // can only change preset on single selection
+
+	      if (_entityIDs.length !== 1) return false;
+	      var entityID = _entityIDs[0];
+	      var entity = context.hasEntity(entityID);
+	      if (!entity) return false; // default to inspector if there are already tags
+
+	      if (entity.hasNonGeometryTags()) return false; // prompt to select preset if feature is new and untagged
+
+	      if (_newFeature) return true; // all existing features except vertices should default to inspector
+
+	      if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any
+
+	      if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any
+
+	      if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices
+
+	      if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices
+
+	      return true;
+	    }
 
-	var IntersectsOp = function IntersectsOp () {};
+	    if (shouldDefaultToPresetList()) {
+	      wrap.style('right', '-100%');
+	      editorPane.classed('hide', true);
+	      presetPane.classed('hide', false).call(presetList);
+	    } else {
+	      wrap.style('right', '0%');
+	      presetPane.classed('hide', true);
+	      editorPane.classed('hide', false).call(entityEditor);
+	    }
 
-	var ItemDistance = function ItemDistance () {};
+	    var footer = selection.selectAll('.footer').data([0]);
+	    footer = footer.enter().append('div').attr('class', 'footer').merge(footer);
+	    footer.call(uiViewOnOSM(context).what(context.hasEntity(_entityIDs.length === 1 && _entityIDs[0])));
+	  }
 
-	ItemDistance.prototype.distance = function distance (item1, item2) {};
-	ItemDistance.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	ItemDistance.prototype.getClass = function getClass () {
-	  return ItemDistance
-	};
+	  inspector.showList = function (presets) {
+	    presetPane.classed('hide', false);
+	    wrap.transition().styleTween('right', function () {
+	      return interpolate('0%', '-100%');
+	    }).on('end', function () {
+	      editorPane.classed('hide', true);
+	    });
 
-	var STRtree = (function (AbstractSTRtree$$1) {
-	  function STRtree (nodeCapacity) {
-	    nodeCapacity = nodeCapacity || STRtree.DEFAULT_NODE_CAPACITY;
-	    AbstractSTRtree$$1.call(this, nodeCapacity);
-	  }
-
-	  if ( AbstractSTRtree$$1 ) { STRtree.__proto__ = AbstractSTRtree$$1; }
-	  STRtree.prototype = Object.create( AbstractSTRtree$$1 && AbstractSTRtree$$1.prototype );
-	  STRtree.prototype.constructor = STRtree;
-
-	  var staticAccessors = { STRtreeNode: { configurable: true },serialVersionUID: { configurable: true },xComparator: { configurable: true },yComparator: { configurable: true },intersectsOp: { configurable: true },DEFAULT_NODE_CAPACITY: { configurable: true } };
-	  STRtree.prototype.createParentBoundablesFromVerticalSlices = function createParentBoundablesFromVerticalSlices (verticalSlices, newLevel) {
-	    var this$1 = this;
-
-	    Assert.isTrue(verticalSlices.length > 0);
-	    var parentBoundables = new ArrayList();
-	    for (var i = 0; i < verticalSlices.length; i++) {
-	      parentBoundables.addAll(this$1.createParentBoundablesFromVerticalSlice(verticalSlices[i], newLevel));
-	    }
-	    return parentBoundables
-	  };
-	  STRtree.prototype.createNode = function createNode (level) {
-	    return new STRtreeNode(level)
-	  };
-	  STRtree.prototype.size = function size () {
-	    if (arguments.length === 0) {
-	      return AbstractSTRtree$$1.prototype.size.call(this)
-	    } else { return AbstractSTRtree$$1.prototype.size.apply(this, arguments) }
-	  };
-	  STRtree.prototype.insert = function insert () {
-	    if (arguments.length === 2) {
-	      var itemEnv = arguments[0];
-	      var item = arguments[1];
-	      if (itemEnv.isNull()) {
-	        return null
-	      }
-	      AbstractSTRtree$$1.prototype.insert.call(this, itemEnv, item);
-	    } else { return AbstractSTRtree$$1.prototype.insert.apply(this, arguments) }
-	  };
-	  STRtree.prototype.getIntersectsOp = function getIntersectsOp () {
-	    return STRtree.intersectsOp
-	  };
-	  STRtree.prototype.verticalSlices = function verticalSlices (childBoundables, sliceCount) {
-	    var sliceCapacity = Math.trunc(Math.ceil(childBoundables.size() / sliceCount));
-	    var slices = new Array(sliceCount).fill(null);
-	    var i = childBoundables.iterator();
-	    for (var j = 0; j < sliceCount; j++) {
-	      slices[j] = new ArrayList();
-	      var boundablesAddedToSlice = 0;
-	      while (i.hasNext() && boundablesAddedToSlice < sliceCapacity) {
-	        var childBoundable = i.next();
-	        slices[j].add(childBoundable);
-	        boundablesAddedToSlice++;
-	      }
-	    }
-	    return slices
-	  };
-	  STRtree.prototype.query = function query () {
-	    if (arguments.length === 1) {
-	      var searchEnv = arguments[0];
-	      return AbstractSTRtree$$1.prototype.query.call(this, searchEnv)
-	    } else if (arguments.length === 2) {
-	      var searchEnv$1 = arguments[0];
-	      var visitor = arguments[1];
-	      AbstractSTRtree$$1.prototype.query.call(this, searchEnv$1, visitor);
-	    } else if (arguments.length === 3) {
-	      if (hasInterface(arguments[2], ItemVisitor) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-	        var searchBounds = arguments[0];
-	        var node = arguments[1];
-	        var visitor$1 = arguments[2];
-	        AbstractSTRtree$$1.prototype.query.call(this, searchBounds, node, visitor$1);
-	      } else if (hasInterface(arguments[2], List) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-	        var searchBounds$1 = arguments[0];
-	        var node$1 = arguments[1];
-	        var matches = arguments[2];
-	        AbstractSTRtree$$1.prototype.query.call(this, searchBounds$1, node$1, matches);
-	      }
-	    }
-	  };
-	  STRtree.prototype.getComparator = function getComparator () {
-	    return STRtree.yComparator
-	  };
-	  STRtree.prototype.createParentBoundablesFromVerticalSlice = function createParentBoundablesFromVerticalSlice (childBoundables, newLevel) {
-	    return AbstractSTRtree$$1.prototype.createParentBoundables.call(this, childBoundables, newLevel)
-	  };
-	  STRtree.prototype.remove = function remove () {
-	    if (arguments.length === 2) {
-	      var itemEnv = arguments[0];
-	      var item = arguments[1];
-	      return AbstractSTRtree$$1.prototype.remove.call(this, itemEnv, item)
-	    } else { return AbstractSTRtree$$1.prototype.remove.apply(this, arguments) }
-	  };
-	  STRtree.prototype.depth = function depth () {
-	    if (arguments.length === 0) {
-	      return AbstractSTRtree$$1.prototype.depth.call(this)
-	    } else { return AbstractSTRtree$$1.prototype.depth.apply(this, arguments) }
-	  };
-	  STRtree.prototype.createParentBoundables = function createParentBoundables (childBoundables, newLevel) {
-	    Assert.isTrue(!childBoundables.isEmpty());
-	    var minLeafCount = Math.trunc(Math.ceil(childBoundables.size() / this.getNodeCapacity()));
-	    var sortedChildBoundables = new ArrayList(childBoundables);
-	    Collections.sort(sortedChildBoundables, STRtree.xComparator);
-	    var verticalSlices = this.verticalSlices(sortedChildBoundables, Math.trunc(Math.ceil(Math.sqrt(minLeafCount))));
-	    return this.createParentBoundablesFromVerticalSlices(verticalSlices, newLevel)
-	  };
-	  STRtree.prototype.nearestNeighbour = function nearestNeighbour () {
-	    if (arguments.length === 1) {
-	      if (hasInterface(arguments[0], ItemDistance)) {
-	        var itemDist = arguments[0];
-	        var bp = new BoundablePair(this.getRoot(), this.getRoot(), itemDist);
-	        return this.nearestNeighbour(bp)
-	      } else if (arguments[0] instanceof BoundablePair) {
-	        var initBndPair = arguments[0];
-	        return this.nearestNeighbour(initBndPair, Double.POSITIVE_INFINITY)
-	      }
-	    } else if (arguments.length === 2) {
-	      if (arguments[0] instanceof STRtree && hasInterface(arguments[1], ItemDistance)) {
-	        var tree = arguments[0];
-	        var itemDist$1 = arguments[1];
-	        var bp$1 = new BoundablePair(this.getRoot(), tree.getRoot(), itemDist$1);
-	        return this.nearestNeighbour(bp$1)
-	      } else if (arguments[0] instanceof BoundablePair && typeof arguments[1] === 'number') {
-	        var initBndPair$1 = arguments[0];
-	        var maxDistance = arguments[1];
-	        var distanceLowerBound = maxDistance;
-	        var minPair = null;
-	        var priQ = new PriorityQueue();
-	        priQ.add(initBndPair$1);
-	        while (!priQ.isEmpty() && distanceLowerBound > 0.0) {
-	          var bndPair = priQ.poll();
-	          var currentDistance = bndPair.getDistance();
-	          if (currentDistance >= distanceLowerBound) { break }
-	          if (bndPair.isLeaves()) {
-	            distanceLowerBound = currentDistance;
-	            minPair = bndPair;
-	          } else {
-	            bndPair.expandToQueue(priQ, distanceLowerBound);
-	          }
-	        }
-	        return [minPair.getBoundable(0).getItem(), minPair.getBoundable(1).getItem()]
-	      }
-	    } else if (arguments.length === 3) {
-	      var env = arguments[0];
-	      var item = arguments[1];
-	      var itemDist$2 = arguments[2];
-	      var bnd = new ItemBoundable(env, item);
-	      var bp$2 = new BoundablePair(this.getRoot(), bnd, itemDist$2);
-	      return this.nearestNeighbour(bp$2)[0]
+	    if (presets) {
+	      presetList.presets(presets);
 	    }
+
+	    presetPane.call(presetList.autofocus(true));
 	  };
-	  STRtree.prototype.interfaces_ = function interfaces_ () {
-	    return [SpatialIndex, Serializable]
-	  };
-	  STRtree.prototype.getClass = function getClass () {
-	    return STRtree
-	  };
-	  STRtree.centreX = function centreX (e) {
-	    return STRtree.avg(e.getMinX(), e.getMaxX())
-	  };
-	  STRtree.avg = function avg (a, b) {
-	    return (a + b) / 2
-	  };
-	  STRtree.centreY = function centreY (e) {
-	    return STRtree.avg(e.getMinY(), e.getMaxY())
-	  };
-	  staticAccessors.STRtreeNode.get = function () { return STRtreeNode };
-	  staticAccessors.serialVersionUID.get = function () { return 259274702368956900 };
-	  staticAccessors.xComparator.get = function () {
-	    return {
-	      interfaces_: function () {
-	        return [Comparator]
-	      },
-	      compare: function (o1, o2) {
-	        return AbstractSTRtree$$1.compareDoubles(STRtree.centreX(o1.getBounds()), STRtree.centreX(o2.getBounds()))
+
+	  inspector.setPreset = function (preset) {
+	    // upon setting multipolygon, go to the area preset list instead of the editor
+	    if (preset && preset.id === 'type/multipolygon') {
+	      presetPane.call(presetList.autofocus(true));
+	    } else {
+	      editorPane.classed('hide', false);
+	      wrap.transition().styleTween('right', function () {
+	        return interpolate('-100%', '0%');
+	      }).on('end', function () {
+	        presetPane.classed('hide', true);
+	      });
+
+	      if (preset) {
+	        entityEditor.presets([preset]);
 	      }
+
+	      editorPane.call(entityEditor);
 	    }
 	  };
-	  staticAccessors.yComparator.get = function () {
-	    return {
-	      interfaces_: function () {
-	        return [Comparator]
-	      },
-	      compare: function (o1, o2) {
-	        return AbstractSTRtree$$1.compareDoubles(STRtree.centreY(o1.getBounds()), STRtree.centreY(o2.getBounds()))
-	      }
-	    }
+
+	  inspector.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    entityEditor.state(_state); // remove any old field help overlay that might have gotten attached to the inspector
+
+	    context.container().selectAll('.field-help-body').remove();
+	    return inspector;
 	  };
-	  staticAccessors.intersectsOp.get = function () {
-	    return {
-	      interfaces_: function () {
-	        return [AbstractSTRtree$$1.IntersectsOp]
-	      },
-	      intersects: function (aBounds, bBounds) {
-	        return aBounds.intersects(bBounds)
-	      }
-	    }
+
+	  inspector.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return inspector;
+	  };
+
+	  inspector.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return inspector;
 	  };
-	  staticAccessors.DEFAULT_NODE_CAPACITY.get = function () { return 10 };
 
-	  Object.defineProperties( STRtree, staticAccessors );
+	  return inspector;
+	}
+
+	function uiSidebar(context) {
+	  var inspector = uiInspector(context);
+	  var dataEditor = uiDataEditor(context);
+	  var noteEditor = uiNoteEditor(context);
+	  var improveOsmEditor = uiImproveOsmEditor(context);
+	  var keepRightEditor = uiKeepRightEditor(context);
+	  var osmoseEditor = uiOsmoseEditor(context);
 
-	  return STRtree;
-	}(AbstractSTRtree));
+	  var _current;
 
-	var STRtreeNode = (function (AbstractNode$$1) {
-	  function STRtreeNode () {
-	    var level = arguments[0];
-	    AbstractNode$$1.call(this, level);
-	  }
+	  var _wasData = false;
+	  var _wasNote = false;
+	  var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events
 
-	  if ( AbstractNode$$1 ) { STRtreeNode.__proto__ = AbstractNode$$1; }
-	  STRtreeNode.prototype = Object.create( AbstractNode$$1 && AbstractNode$$1.prototype );
-	  STRtreeNode.prototype.constructor = STRtreeNode;
-	  STRtreeNode.prototype.computeBounds = function computeBounds () {
-	    var bounds = null;
-	    for (var i = this.getChildBoundables().iterator(); i.hasNext();) {
-	      var childBoundable = i.next();
-	      if (bounds === null) {
-	        bounds = new Envelope(childBoundable.getBounds());
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+
+	  function sidebar(selection) {
+	    var container = context.container();
+	    var minWidth = 240;
+	    var sidebarWidth;
+	    var containerWidth;
+	    var dragOffset; // Set the initial width constraints
+
+	    selection.style('min-width', minWidth + 'px').style('max-width', '400px').style('width', '33.3333%');
+	    var resizer = selection.append('div').attr('class', 'sidebar-resizer').on(_pointerPrefix + 'down.sidebar-resizer', pointerdown);
+	    var downPointerId, lastClientX, containerLocGetter;
+
+	    function pointerdown(d3_event) {
+	      if (downPointerId) return;
+	      if ('button' in d3_event && d3_event.button !== 0) return;
+	      downPointerId = d3_event.pointerId || 'mouse';
+	      lastClientX = d3_event.clientX;
+	      containerLocGetter = utilFastMouse(container.node()); // offset from edge of sidebar-resizer
+
+	      dragOffset = utilFastMouse(resizer.node())(d3_event)[0] - 1;
+	      sidebarWidth = selection.node().getBoundingClientRect().width;
+	      containerWidth = container.node().getBoundingClientRect().width;
+	      var widthPct = sidebarWidth / containerWidth * 100;
+	      selection.style('width', widthPct + '%') // lock in current width
+	      .style('max-width', '85%'); // but allow larger widths
+
+	      resizer.classed('dragging', true);
+	      select(window).on('touchmove.sidebar-resizer', function (d3_event) {
+	        // disable page scrolling while resizing on touch input
+	        d3_event.preventDefault();
+	      }, {
+	        passive: false
+	      }).on(_pointerPrefix + 'move.sidebar-resizer', pointermove).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', pointerup);
+	    }
+
+	    function pointermove(d3_event) {
+	      if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
+	      d3_event.preventDefault();
+	      var dx = d3_event.clientX - lastClientX;
+	      lastClientX = d3_event.clientX;
+	      var isRTL = _mainLocalizer.textDirection() === 'rtl';
+	      var scaleX = isRTL ? 0 : 1;
+	      var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	      var x = containerLocGetter(d3_event)[0] - dragOffset;
+	      sidebarWidth = isRTL ? containerWidth - x : x;
+	      var isCollapsed = selection.classed('collapsed');
+	      var shouldCollapse = sidebarWidth < minWidth;
+	      selection.classed('collapsed', shouldCollapse);
+
+	      if (shouldCollapse) {
+	        if (!isCollapsed) {
+	          selection.style(xMarginProperty, '-400px').style('width', '400px');
+	          context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);
+	        }
 	      } else {
-	        bounds.expandToInclude(childBoundable.getBounds());
+	        var widthPct = sidebarWidth / containerWidth * 100;
+	        selection.style(xMarginProperty, null).style('width', widthPct + '%');
+
+	        if (isCollapsed) {
+	          context.ui().onResize([-sidebarWidth * scaleX, 0]);
+	        } else {
+	          context.ui().onResize([-dx * scaleX, 0]);
+	        }
 	      }
 	    }
-	    return bounds
-	  };
-	  STRtreeNode.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  STRtreeNode.prototype.getClass = function getClass () {
-	    return STRtreeNode
-	  };
 
-	  return STRtreeNode;
-	}(AbstractNode));
+	    function pointerup(d3_event) {
+	      if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
+	      downPointerId = null;
+	      resizer.classed('dragging', false);
+	      select(window).on('touchmove.sidebar-resizer', null).on(_pointerPrefix + 'move.sidebar-resizer', null).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', null);
+	    }
 
-	var SegmentPointComparator = function SegmentPointComparator () {};
+	    var featureListWrap = selection.append('div').attr('class', 'feature-list-pane').call(uiFeatureList(context));
+	    var inspectorWrap = selection.append('div').attr('class', 'inspector-hidden inspector-wrap');
 
-	SegmentPointComparator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentPointComparator.prototype.getClass = function getClass () {
-	  return SegmentPointComparator
-	};
-	SegmentPointComparator.relativeSign = function relativeSign (x0, x1) {
-	  if (x0 < x1) { return -1 }
-	  if (x0 > x1) { return 1 }
-	  return 0
-	};
-	SegmentPointComparator.compare = function compare (octant, p0, p1) {
-	  if (p0.equals2D(p1)) { return 0 }
-	  var xSign = SegmentPointComparator.relativeSign(p0.x, p1.x);
-	  var ySign = SegmentPointComparator.relativeSign(p0.y, p1.y);
-	  switch (octant) {
-	    case 0:
-	      return SegmentPointComparator.compareValue(xSign, ySign)
-	    case 1:
-	      return SegmentPointComparator.compareValue(ySign, xSign)
-	    case 2:
-	      return SegmentPointComparator.compareValue(ySign, -xSign)
-	    case 3:
-	      return SegmentPointComparator.compareValue(-xSign, ySign)
-	    case 4:
-	      return SegmentPointComparator.compareValue(-xSign, -ySign)
-	    case 5:
-	      return SegmentPointComparator.compareValue(-ySign, -xSign)
-	    case 6:
-	      return SegmentPointComparator.compareValue(-ySign, xSign)
-	    case 7:
-	      return SegmentPointComparator.compareValue(xSign, -ySign)
-	  }
-	  Assert.shouldNeverReachHere('invalid octant value');
-	  return 0
-	};
-	SegmentPointComparator.compareValue = function compareValue (compareSign0, compareSign1) {
-	  if (compareSign0 < 0) { return -1 }
-	  if (compareSign0 > 0) { return 1 }
-	  if (compareSign1 < 0) { return -1 }
-	  if (compareSign1 > 0) { return 1 }
-	  return 0
-	};
+	    var hoverModeSelect = function hoverModeSelect(targets) {
+	      context.container().selectAll('.feature-list-item').classed('hover', false);
 
-	var SegmentNode = function SegmentNode () {
-	  this._segString = null;
-	  this.coord = null;
-	  this.segmentIndex = null;
-	  this._segmentOctant = null;
-	  this._isInterior = null;
-	  var segString = arguments[0];
-	  var coord = arguments[1];
-	  var segmentIndex = arguments[2];
-	  var segmentOctant = arguments[3];
-	  this._segString = segString;
-	  this.coord = new Coordinate(coord);
-	  this.segmentIndex = segmentIndex;
-	  this._segmentOctant = segmentOctant;
-	  this._isInterior = !coord.equals2D(segString.getCoordinate(segmentIndex));
-	};
-	SegmentNode.prototype.getCoordinate = function getCoordinate () {
-	  return this.coord
-	};
-	SegmentNode.prototype.print = function print (out) {
-	  out.print(this.coord);
-	  out.print(' seg # = ' + this.segmentIndex);
-	};
-	SegmentNode.prototype.compareTo = function compareTo (obj) {
-	  var other = obj;
-	  if (this.segmentIndex < other.segmentIndex) { return -1 }
-	  if (this.segmentIndex > other.segmentIndex) { return 1 }
-	  if (this.coord.equals2D(other.coord)) { return 0 }
-	  return SegmentPointComparator.compare(this._segmentOctant, this.coord, other.coord)
-	};
-	SegmentNode.prototype.isEndPoint = function isEndPoint (maxSegmentIndex) {
-	  if (this.segmentIndex === 0 && !this._isInterior) { return true }
-	  if (this.segmentIndex === maxSegmentIndex) { return true }
-	  return false
-	};
-	SegmentNode.prototype.isInterior = function isInterior () {
-	  return this._isInterior
-	};
-	SegmentNode.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	SegmentNode.prototype.getClass = function getClass () {
-	  return SegmentNode
-	};
+	      if (context.selectedIDs().length > 1 && targets && targets.length) {
+	        var elements = context.container().selectAll('.feature-list-item').filter(function (node) {
+	          return targets.indexOf(node) !== -1;
+	        });
 
-	// import Iterator from '../../../../java/util/Iterator'
-	var SegmentNodeList = function SegmentNodeList () {
-	  this._nodeMap = new TreeMap();
-	  this._edge = null;
-	  var edge = arguments[0];
-	  this._edge = edge;
-	};
-	SegmentNodeList.prototype.getSplitCoordinates = function getSplitCoordinates () {
-	    var this$1 = this;
-
-	  var coordList = new CoordinateList();
-	  this.addEndpoints();
-	  var it = this.iterator();
-	  var eiPrev = it.next();
-	  while (it.hasNext()) {
-	    var ei = it.next();
-	    this$1.addEdgeCoordinates(eiPrev, ei, coordList);
-	    eiPrev = ei;
-	  }
-	  return coordList.toCoordinateArray()
-	};
-	SegmentNodeList.prototype.addCollapsedNodes = function addCollapsedNodes () {
-	    var this$1 = this;
+	        if (!elements.empty()) {
+	          elements.classed('hover', true);
+	        }
+	      }
+	    };
 
-	  var collapsedVertexIndexes = new ArrayList();
-	  this.findCollapsesFromInsertedNodes(collapsedVertexIndexes);
-	  this.findCollapsesFromExistingVertices(collapsedVertexIndexes);
-	  for (var it = collapsedVertexIndexes.iterator(); it.hasNext();) {
-	    var vertexIndex = it.next().intValue();
-	    this$1.add(this$1._edge.getCoordinate(vertexIndex), vertexIndex);
-	  }
-	};
-	SegmentNodeList.prototype.print = function print (out) {
-	  out.println('Intersections:');
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var ei = it.next();
-	    ei.print(out);
-	  }
-	};
-	SegmentNodeList.prototype.findCollapsesFromExistingVertices = function findCollapsesFromExistingVertices (collapsedVertexIndexes) {
-	    var this$1 = this;
+	    sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
 
-	  for (var i = 0; i < this._edge.size() - 2; i++) {
-	    var p0 = this$1._edge.getCoordinate(i);
-	    // const p1 = this._edge.getCoordinate(i + 1)
-	    var p2 = this$1._edge.getCoordinate(i + 2);
-	    if (p0.equals2D(p2)) {
-	      collapsedVertexIndexes.add(new Integer(i + 1));
-	    }
-	  }
-	};
-	SegmentNodeList.prototype.addEdgeCoordinates = function addEdgeCoordinates (ei0, ei1, coordList) {
-	    var this$1 = this;
-
-	  // let npts = ei1.segmentIndex - ei0.segmentIndex + 2
-	  var lastSegStartPt = this._edge.getCoordinate(ei1.segmentIndex);
-	  var useIntPt1 = ei1.isInterior() || !ei1.coord.equals2D(lastSegStartPt);
-	  // if (!useIntPt1) {
-	  // npts--
-	  // }
-	  // const ipt = 0
-	  coordList.add(new Coordinate(ei0.coord), false);
-	  for (var i = ei0.segmentIndex + 1; i <= ei1.segmentIndex; i++) {
-	    coordList.add(this$1._edge.getCoordinate(i));
-	  }
-	  if (useIntPt1) {
-	    coordList.add(new Coordinate(ei1.coord));
-	  }
-	};
-	SegmentNodeList.prototype.iterator = function iterator () {
-	  return this._nodeMap.values().iterator()
-	};
-	SegmentNodeList.prototype.addSplitEdges = function addSplitEdges (edgeList) {
-	    var this$1 = this;
-
-	  this.addEndpoints();
-	  this.addCollapsedNodes();
-	  var it = this.iterator();
-	  var eiPrev = it.next();
-	  while (it.hasNext()) {
-	    var ei = it.next();
-	    var newEdge = this$1.createSplitEdge(eiPrev, ei);
-	    edgeList.add(newEdge);
-	    eiPrev = ei;
-	  }
-	};
-	SegmentNodeList.prototype.findCollapseIndex = function findCollapseIndex (ei0, ei1, collapsedVertexIndex) {
-	  if (!ei0.coord.equals2D(ei1.coord)) { return false }
-	  var numVerticesBetween = ei1.segmentIndex - ei0.segmentIndex;
-	  if (!ei1.isInterior()) {
-	    numVerticesBetween--;
-	  }
-	  if (numVerticesBetween === 1) {
-	    collapsedVertexIndex[0] = ei0.segmentIndex + 1;
-	    return true
-	  }
-	  return false
-	};
-	SegmentNodeList.prototype.findCollapsesFromInsertedNodes = function findCollapsesFromInsertedNodes (collapsedVertexIndexes) {
-	    var this$1 = this;
-
-	  var collapsedVertexIndex = new Array(1).fill(null);
-	  var it = this.iterator();
-	  var eiPrev = it.next();
-	  while (it.hasNext()) {
-	    var ei = it.next();
-	    var isCollapsed = this$1.findCollapseIndex(eiPrev, ei, collapsedVertexIndex);
-	    if (isCollapsed) { collapsedVertexIndexes.add(new Integer(collapsedVertexIndex[0])); }
-	    eiPrev = ei;
-	  }
-	};
-	SegmentNodeList.prototype.getEdge = function getEdge () {
-	  return this._edge
-	};
-	SegmentNodeList.prototype.addEndpoints = function addEndpoints () {
-	  var maxSegIndex = this._edge.size() - 1;
-	  this.add(this._edge.getCoordinate(0), 0);
-	  this.add(this._edge.getCoordinate(maxSegIndex), maxSegIndex);
-	};
-	SegmentNodeList.prototype.createSplitEdge = function createSplitEdge (ei0, ei1) {
-	    var this$1 = this;
-
-	  var npts = ei1.segmentIndex - ei0.segmentIndex + 2;
-	  var lastSegStartPt = this._edge.getCoordinate(ei1.segmentIndex);
-	  var useIntPt1 = ei1.isInterior() || !ei1.coord.equals2D(lastSegStartPt);
-	  if (!useIntPt1) {
-	    npts--;
-	  }
-	  var pts = new Array(npts).fill(null);
-	  var ipt = 0;
-	  pts[ipt++] = new Coordinate(ei0.coord);
-	  for (var i = ei0.segmentIndex + 1; i <= ei1.segmentIndex; i++) {
-	    pts[ipt++] = this$1._edge.getCoordinate(i);
-	  }
-	  if (useIntPt1) { pts[ipt] = new Coordinate(ei1.coord); }
-	  return new NodedSegmentString(pts, this._edge.getData())
-	};
-	SegmentNodeList.prototype.add = function add (intPt, segmentIndex) {
-	  var eiNew = new SegmentNode(this._edge, intPt, segmentIndex, this._edge.getSegmentOctant(segmentIndex));
-	  var ei = this._nodeMap.get(eiNew);
-	  if (ei !== null) {
-	    Assert.isTrue(ei.coord.equals2D(intPt), 'Found equal nodes with different coordinates');
-	    return ei
-	  }
-	  this._nodeMap.put(eiNew, eiNew);
-	  return eiNew
-	};
-	SegmentNodeList.prototype.checkSplitEdgesCorrectness = function checkSplitEdgesCorrectness (splitEdges) {
-	  var edgePts = this._edge.getCoordinates();
-	  var split0 = splitEdges.get(0);
-	  var pt0 = split0.getCoordinate(0);
-	  if (!pt0.equals2D(edgePts[0])) { throw new RuntimeException('bad split edge start point at ' + pt0) }
-	  var splitn = splitEdges.get(splitEdges.size() - 1);
-	  var splitnPts = splitn.getCoordinates();
-	  var ptn = splitnPts[splitnPts.length - 1];
-	  if (!ptn.equals2D(edgePts[edgePts.length - 1])) { throw new RuntimeException('bad split edge end point at ' + ptn) }
-	};
-	SegmentNodeList.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentNodeList.prototype.getClass = function getClass () {
-	  return SegmentNodeList
-	};
+	    function hover(targets) {
+	      var datum = targets && targets.length && targets[0];
 
+	      if (datum && datum.__featurehash__) {
+	        // hovering on data
+	        _wasData = true;
+	        sidebar.show(dataEditor.datum(datum));
+	        selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+	      } else if (datum instanceof osmNote) {
+	        if (context.mode().id === 'drag-note') return;
+	        _wasNote = true;
+	        var osm = services.osm;
 
+	        if (osm) {
+	          datum = osm.getNote(datum.id); // marker may contain stale data - get latest
+	        }
 
-	// class NodeVertexIterator {
-	//   constructor () {
-	//     this._nodeList = null
-	//     this._edge = null
-	//     this._nodeIt = null
-	//     this._currNode = null
-	//     this._nextNode = null
-	//     this._currSegIndex = 0
-	//     let nodeList = arguments[0]
-	//     this._nodeList = nodeList
-	//     this._edge = nodeList.getEdge()
-	//     this._nodeIt = nodeList.iterator()
-	//     this.readNextNode()
-	//   }
-	//   next () {
-	//     if (this._currNode === null) {
-	//       this._currNode = this._nextNode
-	//       this._currSegIndex = this._currNode.segmentIndex
-	//       this.readNextNode()
-	//       return this._currNode
-	//     }
-	//     if (this._nextNode === null) return null
-	//     if (this._nextNode.segmentIndex === this._currNode.segmentIndex) {
-	//       this._currNode = this._nextNode
-	//       this._currSegIndex = this._currNode.segmentIndex
-	//       this.readNextNode()
-	//       return this._currNode
-	//     }
-	//     if (this._nextNode.segmentIndex > this._currNode.segmentIndex) {}
-	//     return null
-	//   }
-	//   remove () {
-	//     // throw new UnsupportedOperationException(this.getClass().getName())
-	//   }
-	//   hasNext () {
-	//     if (this._nextNode === null) return false
-	//     return true
-	//   }
-	//   readNextNode () {
-	//     if (this._nodeIt.hasNext()) this._nextNode = this._nodeIt.next(); else this._nextNode = null
-	//   }
-	//   interfaces_ () {
-	//     return [Iterator]
-	//   }
-	//   getClass () {
-	//     return NodeVertexIterator
-	//   }
-	// }
+	        sidebar.show(noteEditor.note(datum));
+	        selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+	      } else if (datum instanceof QAItem) {
+	        _wasQaItem = true;
+	        var errService = services[datum.service];
 
-	var Octant = function Octant () {};
+	        if (errService) {
+	          // marker may contain stale data - get latest
+	          datum = errService.getError(datum.id);
+	        } // Currently only three possible services
 
-	Octant.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Octant.prototype.getClass = function getClass () {
-	  return Octant
-	};
-	Octant.octant = function octant () {
-	  if (typeof arguments[0] === 'number' && typeof arguments[1] === 'number') {
-	    var dx = arguments[0];
-	    var dy = arguments[1];
-	    if (dx === 0.0 && dy === 0.0) { throw new IllegalArgumentException('Cannot compute the octant for point ( ' + dx + ', ' + dy + ' )') }
-	    var adx = Math.abs(dx);
-	    var ady = Math.abs(dy);
-	    if (dx >= 0) {
-	      if (dy >= 0) {
-	        if (adx >= ady) { return 0; } else { return 1 }
-	      } else {
-	        if (adx >= ady) { return 7; } else { return 6 }
-	      }
-	    } else {
-	      if (dy >= 0) {
-	        if (adx >= ady) { return 3; } else { return 2 }
-	      } else {
-	        if (adx >= ady) { return 4; } else { return 5 }
+
+	        var errEditor;
+
+	        if (datum.service === 'keepRight') {
+	          errEditor = keepRightEditor;
+	        } else if (datum.service === 'osmose') {
+	          errEditor = osmoseEditor;
+	        } else {
+	          errEditor = improveOsmEditor;
+	        }
+
+	        context.container().selectAll('.qaItem.' + datum.service).classed('hover', function (d) {
+	          return d.id === datum.id;
+	        });
+	        sidebar.show(errEditor.error(datum));
+	        selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+	      } else if (!_current && datum instanceof osmEntity) {
+	        featureListWrap.classed('inspector-hidden', true);
+	        inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', true);
+
+	        if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
+	          inspector.state('hover').entityIDs([datum.id]).newFeature(false);
+	          inspectorWrap.call(inspector);
+	        }
+	      } else if (!_current) {
+	        featureListWrap.classed('inspector-hidden', false);
+	        inspectorWrap.classed('inspector-hidden', true);
+	        inspector.state('hide');
+	      } else if (_wasData || _wasNote || _wasQaItem) {
+	        _wasNote = false;
+	        _wasData = false;
+	        _wasQaItem = false;
+	        context.container().selectAll('.note').classed('hover', false);
+	        context.container().selectAll('.qaItem').classed('hover', false);
+	        sidebar.hide();
 	      }
 	    }
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Coordinate) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    var dx$1 = p1.x - p0.x;
-	    var dy$1 = p1.y - p0.y;
-	    if (dx$1 === 0.0 && dy$1 === 0.0) { throw new IllegalArgumentException('Cannot compute the octant for two identical points ' + p0) }
-	    return Octant.octant(dx$1, dy$1)
-	  }
-	};
 
-	var SegmentString = function SegmentString () {};
+	    sidebar.hover = throttle(hover, 200);
 
-	SegmentString.prototype.getCoordinates = function getCoordinates () {};
-	SegmentString.prototype.size = function size () {};
-	SegmentString.prototype.getCoordinate = function getCoordinate (i) {};
-	SegmentString.prototype.isClosed = function isClosed () {};
-	SegmentString.prototype.setData = function setData (data) {};
-	SegmentString.prototype.getData = function getData () {};
-	SegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentString.prototype.getClass = function getClass () {
-	  return SegmentString
-	};
+	    sidebar.intersects = function (extent) {
+	      var rect = selection.node().getBoundingClientRect();
+	      return extent.intersects([context.projection.invert([0, rect.height]), context.projection.invert([rect.width, 0])]);
+	    };
 
-	var NodableSegmentString = function NodableSegmentString () {};
+	    sidebar.select = function (ids, newFeature) {
+	      sidebar.hide();
 
-	NodableSegmentString.prototype.addIntersection = function addIntersection (intPt, segmentIndex) {};
-	NodableSegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentString]
-	};
-	NodableSegmentString.prototype.getClass = function getClass () {
-	  return NodableSegmentString
-	};
+	      if (ids && ids.length) {
+	        var entity = ids.length === 1 && context.entity(ids[0]);
 
-	var NodedSegmentString = function NodedSegmentString () {
-	  this._nodeList = new SegmentNodeList(this);
-	  this._pts = null;
-	  this._data = null;
-	  var pts = arguments[0];
-	  var data = arguments[1];
-	  this._pts = pts;
-	  this._data = data;
-	};
-	NodedSegmentString.prototype.getCoordinates = function getCoordinates () {
-	  return this._pts
-	};
-	NodedSegmentString.prototype.size = function size () {
-	  return this._pts.length
-	};
-	NodedSegmentString.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pts[i]
-	};
-	NodedSegmentString.prototype.isClosed = function isClosed () {
-	  return this._pts[0].equals(this._pts[this._pts.length - 1])
-	};
-	NodedSegmentString.prototype.getSegmentOctant = function getSegmentOctant (index) {
-	  if (index === this._pts.length - 1) { return -1 }
-	  return this.safeOctant(this.getCoordinate(index), this.getCoordinate(index + 1))
-	};
-	NodedSegmentString.prototype.setData = function setData (data) {
-	  this._data = data;
-	};
-	NodedSegmentString.prototype.safeOctant = function safeOctant (p0, p1) {
-	  if (p0.equals2D(p1)) { return 0 }
-	  return Octant.octant(p0, p1)
-	};
-	NodedSegmentString.prototype.getData = function getData () {
-	  return this._data
-	};
-	NodedSegmentString.prototype.addIntersection = function addIntersection () {
-	  if (arguments.length === 2) {
-	    var intPt$1 = arguments[0];
-	    var segmentIndex = arguments[1];
-	    this.addIntersectionNode(intPt$1, segmentIndex);
-	  } else if (arguments.length === 4) {
-	    var li = arguments[0];
-	    var segmentIndex$1 = arguments[1];
-	    // const geomIndex = arguments[2]
-	    var intIndex = arguments[3];
-	    var intPt = new Coordinate(li.getIntersection(intIndex));
-	    this.addIntersection(intPt, segmentIndex$1);
-	  }
-	};
-	NodedSegmentString.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(new CoordinateArraySequence(this._pts))
-	};
-	NodedSegmentString.prototype.getNodeList = function getNodeList () {
-	  return this._nodeList
-	};
-	NodedSegmentString.prototype.addIntersectionNode = function addIntersectionNode (intPt, segmentIndex) {
-	  var normalizedSegmentIndex = segmentIndex;
-	  var nextSegIndex = normalizedSegmentIndex + 1;
-	  if (nextSegIndex < this._pts.length) {
-	    var nextPt = this._pts[nextSegIndex];
-	    if (intPt.equals2D(nextPt)) {
-	      normalizedSegmentIndex = nextSegIndex;
-	    }
-	  }
-	  var ei = this._nodeList.add(intPt, normalizedSegmentIndex);
-	  return ei
-	};
-	NodedSegmentString.prototype.addIntersections = function addIntersections (li, segmentIndex, geomIndex) {
-	    var this$1 = this;
+	        if (entity && newFeature && selection.classed('collapsed')) {
+	          // uncollapse the sidebar
+	          var extent = entity.extent(context.graph());
+	          sidebar.expand(sidebar.intersects(extent));
+	        }
 
-	  for (var i = 0; i < li.getIntersectionNum(); i++) {
-	    this$1.addIntersection(li, segmentIndex, geomIndex, i);
-	  }
-	};
-	NodedSegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return [NodableSegmentString]
-	};
-	NodedSegmentString.prototype.getClass = function getClass () {
-	  return NodedSegmentString
-	};
-	NodedSegmentString.getNodedSubstrings = function getNodedSubstrings () {
-	  if (arguments.length === 1) {
-	    var segStrings = arguments[0];
-	    var resultEdgelist = new ArrayList();
-	    NodedSegmentString.getNodedSubstrings(segStrings, resultEdgelist);
-	    return resultEdgelist
-	  } else if (arguments.length === 2) {
-	    var segStrings$1 = arguments[0];
-	    var resultEdgelist$1 = arguments[1];
-	    for (var i = segStrings$1.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      ss.getNodeList().addSplitEdges(resultEdgelist$1);
-	    }
-	  }
-	};
+	        featureListWrap.classed('inspector-hidden', true);
+	        inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', false); // reload the UI even if the ids are the same since the entities
+	        // themselves may have changed
 
-	var LineSegment = function LineSegment () {
-	  this.p0 = null;
-	  this.p1 = null;
-	  if (arguments.length === 0) {
-	    this.p0 = new Coordinate();
-	    this.p1 = new Coordinate();
-	  } else if (arguments.length === 1) {
-	    var ls = arguments[0];
-	    this.p0 = new Coordinate(ls.p0);
-	    this.p1 = new Coordinate(ls.p1);
-	  } else if (arguments.length === 2) {
-	    this.p0 = arguments[0];
-	    this.p1 = arguments[1];
-	  } else if (arguments.length === 4) {
-	    var x0 = arguments[0];
-	    var y0 = arguments[1];
-	    var x1 = arguments[2];
-	    var y1 = arguments[3];
-	    this.p0 = new Coordinate(x0, y0);
-	    this.p1 = new Coordinate(x1, y1);
-	  }
-	};
+	        inspector.state('select').entityIDs(ids).newFeature(newFeature);
+	        inspectorWrap.call(inspector);
+	      } else {
+	        inspector.state('hide');
+	      }
+	    };
 
-	var staticAccessors$24 = { serialVersionUID: { configurable: true } };
-	LineSegment.prototype.minX = function minX () {
-	  return Math.min(this.p0.x, this.p1.x)
-	};
-	LineSegment.prototype.orientationIndex = function orientationIndex () {
-	  if (arguments[0] instanceof LineSegment) {
-	    var seg = arguments[0];
-	    var orient0 = CGAlgorithms.orientationIndex(this.p0, this.p1, seg.p0);
-	    var orient1 = CGAlgorithms.orientationIndex(this.p0, this.p1, seg.p1);
-	    if (orient0 >= 0 && orient1 >= 0) { return Math.max(orient0, orient1) }
-	    if (orient0 <= 0 && orient1 <= 0) { return Math.max(orient0, orient1) }
-	    return 0
-	  } else if (arguments[0] instanceof Coordinate) {
-	    var p = arguments[0];
-	    return CGAlgorithms.orientationIndex(this.p0, this.p1, p)
-	  }
-	};
-	LineSegment.prototype.toGeometry = function toGeometry (geomFactory) {
-	  return geomFactory.createLineString([this.p0, this.p1])
-	};
-	LineSegment.prototype.isVertical = function isVertical () {
-	  return this.p0.x === this.p1.x
-	};
-	LineSegment.prototype.equals = function equals (o) {
-	  if (!(o instanceof LineSegment)) {
-	    return false
-	  }
-	  var other = o;
-	  return this.p0.equals(other.p0) && this.p1.equals(other.p1)
-	};
-	LineSegment.prototype.intersection = function intersection (line) {
-	  var li = new RobustLineIntersector();
-	  li.computeIntersection(this.p0, this.p1, line.p0, line.p1);
-	  if (li.hasIntersection()) { return li.getIntersection(0) }
-	  return null
-	};
-	LineSegment.prototype.project = function project () {
-	  if (arguments[0] instanceof Coordinate) {
-	    var p = arguments[0];
-	    if (p.equals(this.p0) || p.equals(this.p1)) { return new Coordinate(p) }
-	    var r = this.projectionFactor(p);
-	    var coord = new Coordinate();
-	    coord.x = this.p0.x + r * (this.p1.x - this.p0.x);
-	    coord.y = this.p0.y + r * (this.p1.y - this.p0.y);
-	    return coord
-	  } else if (arguments[0] instanceof LineSegment) {
-	    var seg = arguments[0];
-	    var pf0 = this.projectionFactor(seg.p0);
-	    var pf1 = this.projectionFactor(seg.p1);
-	    if (pf0 >= 1.0 && pf1 >= 1.0) { return null }
-	    if (pf0 <= 0.0 && pf1 <= 0.0) { return null }
-	    var newp0 = this.project(seg.p0);
-	    if (pf0 < 0.0) { newp0 = this.p0; }
-	    if (pf0 > 1.0) { newp0 = this.p1; }
-	    var newp1 = this.project(seg.p1);
-	    if (pf1 < 0.0) { newp1 = this.p0; }
-	    if (pf1 > 1.0) { newp1 = this.p1; }
-	    return new LineSegment(newp0, newp1)
-	  }
-	};
-	LineSegment.prototype.normalize = function normalize () {
-	  if (this.p1.compareTo(this.p0) < 0) { this.reverse(); }
-	};
-	LineSegment.prototype.angle = function angle () {
-	  return Math.atan2(this.p1.y - this.p0.y, this.p1.x - this.p0.x)
-	};
-	LineSegment.prototype.getCoordinate = function getCoordinate (i) {
-	  if (i === 0) { return this.p0 }
-	  return this.p1
-	};
-	LineSegment.prototype.distancePerpendicular = function distancePerpendicular (p) {
-	  return CGAlgorithms.distancePointLinePerpendicular(p, this.p0, this.p1)
-	};
-	LineSegment.prototype.minY = function minY () {
-	  return Math.min(this.p0.y, this.p1.y)
-	};
-	LineSegment.prototype.midPoint = function midPoint () {
-	  return LineSegment.midPoint(this.p0, this.p1)
-	};
-	LineSegment.prototype.projectionFactor = function projectionFactor (p) {
-	  if (p.equals(this.p0)) { return 0.0 }
-	  if (p.equals(this.p1)) { return 1.0 }
-	  var dx = this.p1.x - this.p0.x;
-	  var dy = this.p1.y - this.p0.y;
-	  var len = dx * dx + dy * dy;
-	  if (len <= 0.0) { return Double.NaN }
-	  var r = ((p.x - this.p0.x) * dx + (p.y - this.p0.y) * dy) / len;
-	  return r
-	};
-	LineSegment.prototype.closestPoints = function closestPoints (line) {
-	  var intPt = this.intersection(line);
-	  if (intPt !== null) {
-	    return [intPt, intPt]
-	  }
-	  var closestPt = new Array(2).fill(null);
-	  var minDistance = Double.MAX_VALUE;
-	  var dist = null;
-	  var close00 = this.closestPoint(line.p0);
-	  minDistance = close00.distance(line.p0);
-	  closestPt[0] = close00;
-	  closestPt[1] = line.p0;
-	  var close01 = this.closestPoint(line.p1);
-	  dist = close01.distance(line.p1);
-	  if (dist < minDistance) {
-	    minDistance = dist;
-	    closestPt[0] = close01;
-	    closestPt[1] = line.p1;
-	  }
-	  var close10 = line.closestPoint(this.p0);
-	  dist = close10.distance(this.p0);
-	  if (dist < minDistance) {
-	    minDistance = dist;
-	    closestPt[0] = this.p0;
-	    closestPt[1] = close10;
-	  }
-	  var close11 = line.closestPoint(this.p1);
-	  dist = close11.distance(this.p1);
-	  if (dist < minDistance) {
-	    minDistance = dist;
-	    closestPt[0] = this.p1;
-	    closestPt[1] = close11;
-	  }
-	  return closestPt
-	};
-	LineSegment.prototype.closestPoint = function closestPoint (p) {
-	  var factor = this.projectionFactor(p);
-	  if (factor > 0 && factor < 1) {
-	    return this.project(p)
-	  }
-	  var dist0 = this.p0.distance(p);
-	  var dist1 = this.p1.distance(p);
-	  if (dist0 < dist1) { return this.p0 }
-	  return this.p1
-	};
-	LineSegment.prototype.maxX = function maxX () {
-	  return Math.max(this.p0.x, this.p1.x)
-	};
-	LineSegment.prototype.getLength = function getLength () {
-	  return this.p0.distance(this.p1)
-	};
-	LineSegment.prototype.compareTo = function compareTo (o) {
-	  var other = o;
-	  var comp0 = this.p0.compareTo(other.p0);
-	  if (comp0 !== 0) { return comp0 }
-	  return this.p1.compareTo(other.p1)
-	};
-	LineSegment.prototype.reverse = function reverse () {
-	  var temp = this.p0;
-	  this.p0 = this.p1;
-	  this.p1 = temp;
-	};
-	LineSegment.prototype.equalsTopo = function equalsTopo (other) {
-	  return this.p0.equals(other.p0) &&
-	        (this.p1.equals(other.p1) || this.p0.equals(other.p1)) &&
-	         this.p1.equals(other.p0)
-	};
-	LineSegment.prototype.lineIntersection = function lineIntersection (line) {
-	  try {
-	    var intPt = HCoordinate.intersection(this.p0, this.p1, line.p0, line.p1);
-	    return intPt
-	  } catch (ex) {
-	    if (ex instanceof NotRepresentableException) ; else { throw ex }
-	  } finally {}
-	  return null
-	};
-	LineSegment.prototype.maxY = function maxY () {
-	  return Math.max(this.p0.y, this.p1.y)
-	};
-	LineSegment.prototype.pointAlongOffset = function pointAlongOffset (segmentLengthFraction, offsetDistance) {
-	  var segx = this.p0.x + segmentLengthFraction * (this.p1.x - this.p0.x);
-	  var segy = this.p0.y + segmentLengthFraction * (this.p1.y - this.p0.y);
-	  var dx = this.p1.x - this.p0.x;
-	  var dy = this.p1.y - this.p0.y;
-	  var len = Math.sqrt(dx * dx + dy * dy);
-	  var ux = 0.0;
-	  var uy = 0.0;
-	  if (offsetDistance !== 0.0) {
-	    if (len <= 0.0) { throw new Error('Cannot compute offset from zero-length line segment') }
-	    ux = offsetDistance * dx / len;
-	    uy = offsetDistance * dy / len;
-	  }
-	  var offsetx = segx - uy;
-	  var offsety = segy + ux;
-	  var coord = new Coordinate(offsetx, offsety);
-	  return coord
-	};
-	LineSegment.prototype.setCoordinates = function setCoordinates () {
-	  if (arguments.length === 1) {
-	    var ls = arguments[0];
-	    this.setCoordinates(ls.p0, ls.p1);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    this.p0.x = p0.x;
-	    this.p0.y = p0.y;
-	    this.p1.x = p1.x;
-	    this.p1.y = p1.y;
-	  }
-	};
-	LineSegment.prototype.segmentFraction = function segmentFraction (inputPt) {
-	  var segFrac = this.projectionFactor(inputPt);
-	  if (segFrac < 0.0) { segFrac = 0.0; } else if (segFrac > 1.0 || Double.isNaN(segFrac)) { segFrac = 1.0; }
-	  return segFrac
-	};
-	LineSegment.prototype.toString = function toString () {
-	  return 'LINESTRING( ' + this.p0.x + ' ' + this.p0.y + ', ' + this.p1.x + ' ' + this.p1.y + ')'
-	};
-	LineSegment.prototype.isHorizontal = function isHorizontal () {
-	  return this.p0.y === this.p1.y
-	};
-	LineSegment.prototype.distance = function distance () {
-	  if (arguments[0] instanceof LineSegment) {
-	    var ls = arguments[0];
-	    return CGAlgorithms.distanceLineLine(this.p0, this.p1, ls.p0, ls.p1)
-	  } else if (arguments[0] instanceof Coordinate) {
-	    var p = arguments[0];
-	    return CGAlgorithms.distancePointLine(p, this.p0, this.p1)
-	  }
-	};
-	LineSegment.prototype.pointAlong = function pointAlong (segmentLengthFraction) {
-	  var coord = new Coordinate();
-	  coord.x = this.p0.x + segmentLengthFraction * (this.p1.x - this.p0.x);
-	  coord.y = this.p0.y + segmentLengthFraction * (this.p1.y - this.p0.y);
-	  return coord
-	};
-	LineSegment.prototype.hashCode = function hashCode () {
-	  var bits0 = Double.doubleToLongBits(this.p0.x);
-	  bits0 ^= Double.doubleToLongBits(this.p0.y) * 31;
-	  var hash0 = Math.trunc(bits0) ^ Math.trunc(bits0 >> 32);
-	  var bits1 = Double.doubleToLongBits(this.p1.x);
-	  bits1 ^= Double.doubleToLongBits(this.p1.y) * 31;
-	  var hash1 = Math.trunc(bits1) ^ Math.trunc(bits1 >> 32);
-	  return hash0 ^ hash1
-	};
-	LineSegment.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable, Serializable]
-	};
-	LineSegment.prototype.getClass = function getClass () {
-	  return LineSegment
-	};
-	LineSegment.midPoint = function midPoint (p0, p1) {
-	  return new Coordinate((p0.x + p1.x) / 2, (p0.y + p1.y) / 2)
-	};
-	staticAccessors$24.serialVersionUID.get = function () { return 3252005833466256227 };
+	    sidebar.showPresetList = function () {
+	      inspector.showList();
+	    };
 
-	Object.defineProperties( LineSegment, staticAccessors$24 );
+	    sidebar.show = function (component, element) {
+	      featureListWrap.classed('inspector-hidden', true);
+	      inspectorWrap.classed('inspector-hidden', true);
+	      if (_current) _current.remove();
+	      _current = selection.append('div').attr('class', 'sidebar-component').call(component, element);
+	    };
 
-	var MonotoneChainOverlapAction = function MonotoneChainOverlapAction () {
-	  this.tempEnv1 = new Envelope();
-	  this.tempEnv2 = new Envelope();
-	  this._overlapSeg1 = new LineSegment();
-	  this._overlapSeg2 = new LineSegment();
-	};
-	MonotoneChainOverlapAction.prototype.overlap = function overlap () {
-	  if (arguments.length === 2) ; else if (arguments.length === 4) {
-	    var mc1 = arguments[0];
-	    var start1 = arguments[1];
-	    var mc2 = arguments[2];
-	    var start2 = arguments[3];
-	    mc1.getLineSegment(start1, this._overlapSeg1);
-	    mc2.getLineSegment(start2, this._overlapSeg2);
-	    this.overlap(this._overlapSeg1, this._overlapSeg2);
-	  }
-	};
-	MonotoneChainOverlapAction.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainOverlapAction.prototype.getClass = function getClass () {
-	  return MonotoneChainOverlapAction
-	};
+	    sidebar.hide = function () {
+	      featureListWrap.classed('inspector-hidden', false);
+	      inspectorWrap.classed('inspector-hidden', true);
+	      if (_current) _current.remove();
+	      _current = null;
+	    };
 
-	var MonotoneChain = function MonotoneChain () {
-	  this._pts = null;
-	  this._start = null;
-	  this._end = null;
-	  this._env = null;
-	  this._context = null;
-	  this._id = null;
-	  var pts = arguments[0];
-	  var start = arguments[1];
-	  var end = arguments[2];
-	  var context = arguments[3];
-	  this._pts = pts;
-	  this._start = start;
-	  this._end = end;
-	  this._context = context;
-	};
-	MonotoneChain.prototype.getLineSegment = function getLineSegment (index, ls) {
-	  ls.p0 = this._pts[index];
-	  ls.p1 = this._pts[index + 1];
-	};
-	MonotoneChain.prototype.computeSelect = function computeSelect (searchEnv, start0, end0, mcs) {
-	  var p0 = this._pts[start0];
-	  var p1 = this._pts[end0];
-	  mcs.tempEnv1.init(p0, p1);
-	  if (end0 - start0 === 1) {
-	    mcs.select(this, start0);
-	    return null
-	  }
-	  if (!searchEnv.intersects(mcs.tempEnv1)) { return null }
-	  var mid = Math.trunc((start0 + end0) / 2);
-	  if (start0 < mid) {
-	    this.computeSelect(searchEnv, start0, mid, mcs);
-	  }
-	  if (mid < end0) {
-	    this.computeSelect(searchEnv, mid, end0, mcs);
-	  }
-	};
-	MonotoneChain.prototype.getCoordinates = function getCoordinates () {
-	    var this$1 = this;
+	    sidebar.expand = function (moveMap) {
+	      if (selection.classed('collapsed')) {
+	        sidebar.toggle(moveMap);
+	      }
+	    };
 
-	  var coord = new Array(this._end - this._start + 1).fill(null);
-	  var index = 0;
-	  for (var i = this._start; i <= this._end; i++) {
-	    coord[index++] = this$1._pts[i];
-	  }
-	  return coord
-	};
-	MonotoneChain.prototype.computeOverlaps = function computeOverlaps (mc, mco) {
-	  this.computeOverlapsInternal(this._start, this._end, mc, mc._start, mc._end, mco);
-	};
-	MonotoneChain.prototype.setId = function setId (id) {
-	  this._id = id;
-	};
-	MonotoneChain.prototype.select = function select (searchEnv, mcs) {
-	  this.computeSelect(searchEnv, this._start, this._end, mcs);
-	};
-	MonotoneChain.prototype.getEnvelope = function getEnvelope () {
-	  if (this._env === null) {
-	    var p0 = this._pts[this._start];
-	    var p1 = this._pts[this._end];
-	    this._env = new Envelope(p0, p1);
-	  }
-	  return this._env
-	};
-	MonotoneChain.prototype.getEndIndex = function getEndIndex () {
-	  return this._end
-	};
-	MonotoneChain.prototype.getStartIndex = function getStartIndex () {
-	  return this._start
-	};
-	MonotoneChain.prototype.getContext = function getContext () {
-	  return this._context
-	};
-	MonotoneChain.prototype.getId = function getId () {
-	  return this._id
-	};
-	MonotoneChain.prototype.computeOverlapsInternal = function computeOverlapsInternal (start0, end0, mc, start1, end1, mco) {
-	  var p00 = this._pts[start0];
-	  var p01 = this._pts[end0];
-	  var p10 = mc._pts[start1];
-	  var p11 = mc._pts[end1];
-	  if (end0 - start0 === 1 && end1 - start1 === 1) {
-	    mco.overlap(this, start0, mc, start1);
-	    return null
-	  }
-	  mco.tempEnv1.init(p00, p01);
-	  mco.tempEnv2.init(p10, p11);
-	  if (!mco.tempEnv1.intersects(mco.tempEnv2)) { return null }
-	  var mid0 = Math.trunc((start0 + end0) / 2);
-	  var mid1 = Math.trunc((start1 + end1) / 2);
-	  if (start0 < mid0) {
-	    if (start1 < mid1) { this.computeOverlapsInternal(start0, mid0, mc, start1, mid1, mco); }
-	    if (mid1 < end1) { this.computeOverlapsInternal(start0, mid0, mc, mid1, end1, mco); }
-	  }
-	  if (mid0 < end0) {
-	    if (start1 < mid1) { this.computeOverlapsInternal(mid0, end0, mc, start1, mid1, mco); }
-	    if (mid1 < end1) { this.computeOverlapsInternal(mid0, end0, mc, mid1, end1, mco); }
-	  }
-	};
-	MonotoneChain.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChain.prototype.getClass = function getClass () {
-	  return MonotoneChain
-	};
+	    sidebar.collapse = function (moveMap) {
+	      if (!selection.classed('collapsed')) {
+	        sidebar.toggle(moveMap);
+	      }
+	    };
 
-	var MonotoneChainBuilder = function MonotoneChainBuilder () {};
+	    sidebar.toggle = function (d3_event, moveMap) {
+	      var e = d3_event;
 
-	MonotoneChainBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainBuilder.prototype.getClass = function getClass () {
-	  return MonotoneChainBuilder
-	};
-	MonotoneChainBuilder.getChainStartIndices = function getChainStartIndices (pts) {
-	  var start = 0;
-	  var startIndexList = new ArrayList();
-	  startIndexList.add(new Integer(start));
-	  do {
-	    var last = MonotoneChainBuilder.findChainEnd(pts, start);
-	    startIndexList.add(new Integer(last));
-	    start = last;
-	  } while (start < pts.length - 1)
-	  var startIndex = MonotoneChainBuilder.toIntArray(startIndexList);
-	  return startIndex
-	};
-	MonotoneChainBuilder.findChainEnd = function findChainEnd (pts, start) {
-	  var safeStart = start;
-	  while (safeStart < pts.length - 1 && pts[safeStart].equals2D(pts[safeStart + 1])) {
-	    safeStart++;
-	  }
-	  if (safeStart >= pts.length - 1) {
-	    return pts.length - 1
-	  }
-	  var chainQuad = Quadrant.quadrant(pts[safeStart], pts[safeStart + 1]);
-	  var last = start + 1;
-	  while (last < pts.length) {
-	    if (!pts[last - 1].equals2D(pts[last])) {
-	      var quad = Quadrant.quadrant(pts[last - 1], pts[last]);
-	      if (quad !== chainQuad) { break }
-	    }
-	    last++;
-	  }
-	  return last - 1
-	};
-	MonotoneChainBuilder.getChains = function getChains () {
-	  if (arguments.length === 1) {
-	    var pts = arguments[0];
-	    return MonotoneChainBuilder.getChains(pts, null)
-	  } else if (arguments.length === 2) {
-	    var pts$1 = arguments[0];
-	    var context = arguments[1];
-	    var mcList = new ArrayList();
-	    var startIndex = MonotoneChainBuilder.getChainStartIndices(pts$1);
-	    for (var i = 0; i < startIndex.length - 1; i++) {
-	      var mc = new MonotoneChain(pts$1, startIndex[i], startIndex[i + 1], context);
-	      mcList.add(mc);
-	    }
-	    return mcList
-	  }
-	};
-	MonotoneChainBuilder.toIntArray = function toIntArray (list) {
-	  var array = new Array(list.size()).fill(null);
-	  for (var i = 0; i < array.length; i++) {
-	    array[i] = list.get(i).intValue();
-	  }
-	  return array
-	};
+	      if (e && e.sourceEvent) {
+	        e.sourceEvent.preventDefault();
+	      } else if (e) {
+	        e.preventDefault();
+	      } // Don't allow sidebar to toggle when the user is in the walkthrough.
 
-	var Noder = function Noder () {};
 
-	Noder.prototype.computeNodes = function computeNodes (segStrings) {};
-	Noder.prototype.getNodedSubstrings = function getNodedSubstrings () {};
-	Noder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Noder.prototype.getClass = function getClass () {
-	  return Noder
-	};
+	      if (context.inIntro()) return;
+	      var isCollapsed = selection.classed('collapsed');
+	      var isCollapsing = !isCollapsed;
+	      var isRTL = _mainLocalizer.textDirection() === 'rtl';
+	      var scaleX = isRTL ? 0 : 1;
+	      var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	      sidebarWidth = selection.node().getBoundingClientRect().width; // switch from % to px
 
-	var SinglePassNoder = function SinglePassNoder () {
-	  this._segInt = null;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var segInt = arguments[0];
-	    this.setSegmentIntersector(segInt);
-	  }
-	};
-	SinglePassNoder.prototype.setSegmentIntersector = function setSegmentIntersector (segInt) {
-	  this._segInt = segInt;
-	};
-	SinglePassNoder.prototype.interfaces_ = function interfaces_ () {
-	  return [Noder]
-	};
-	SinglePassNoder.prototype.getClass = function getClass () {
-	  return SinglePassNoder
-	};
+	      selection.style('width', sidebarWidth + 'px');
+	      var startMargin, endMargin, lastMargin;
 
-	var MCIndexNoder = (function (SinglePassNoder$$1) {
-	  function MCIndexNoder (si) {
-	    if (si) { SinglePassNoder$$1.call(this, si); }
-	    else { SinglePassNoder$$1.call(this); }
-	    this._monoChains = new ArrayList();
-	    this._index = new STRtree();
-	    this._idCounter = 0;
-	    this._nodedSegStrings = null;
-	    this._nOverlaps = 0;
-	  }
+	      if (isCollapsing) {
+	        startMargin = lastMargin = 0;
+	        endMargin = -sidebarWidth;
+	      } else {
+	        startMargin = lastMargin = -sidebarWidth;
+	        endMargin = 0;
+	      }
 
-	  if ( SinglePassNoder$$1 ) { MCIndexNoder.__proto__ = SinglePassNoder$$1; }
-	  MCIndexNoder.prototype = Object.create( SinglePassNoder$$1 && SinglePassNoder$$1.prototype );
-	  MCIndexNoder.prototype.constructor = MCIndexNoder;
+	      selection.transition().style(xMarginProperty, endMargin + 'px').tween('panner', function () {
+	        var i = d3_interpolateNumber(startMargin, endMargin);
+	        return function (t) {
+	          var dx = lastMargin - Math.round(i(t));
+	          lastMargin = lastMargin - dx;
+	          context.ui().onResize(moveMap ? undefined : [dx * scaleX, 0]);
+	        };
+	      }).on('end', function () {
+	        selection.classed('collapsed', isCollapsing); // switch back from px to %
 
-	  var staticAccessors = { SegmentOverlapAction: { configurable: true } };
-	  MCIndexNoder.prototype.getMonotoneChains = function getMonotoneChains () {
-	    return this._monoChains
-	  };
-	  MCIndexNoder.prototype.getNodedSubstrings = function getNodedSubstrings () {
-	    return NodedSegmentString.getNodedSubstrings(this._nodedSegStrings)
-	  };
-	  MCIndexNoder.prototype.getIndex = function getIndex () {
-	    return this._index
-	  };
-	  MCIndexNoder.prototype.add = function add (segStr) {
-	    var this$1 = this;
-
-	    var segChains = MonotoneChainBuilder.getChains(segStr.getCoordinates(), segStr);
-	    for (var i = segChains.iterator(); i.hasNext();) {
-	      var mc = i.next();
-	      mc.setId(this$1._idCounter++);
-	      this$1._index.insert(mc.getEnvelope(), mc);
-	      this$1._monoChains.add(mc);
-	    }
-	  };
-	  MCIndexNoder.prototype.computeNodes = function computeNodes (inputSegStrings) {
-	    var this$1 = this;
-
-	    this._nodedSegStrings = inputSegStrings;
-	    for (var i = inputSegStrings.iterator(); i.hasNext();) {
-	      this$1.add(i.next());
-	    }
-	    this.intersectChains();
-	  };
-	  MCIndexNoder.prototype.intersectChains = function intersectChains () {
-	    var this$1 = this;
-
-	    var overlapAction = new SegmentOverlapAction(this._segInt);
-	    for (var i = this._monoChains.iterator(); i.hasNext();) {
-	      var queryChain = i.next();
-	      var overlapChains = this$1._index.query(queryChain.getEnvelope());
-	      for (var j = overlapChains.iterator(); j.hasNext();) {
-	        var testChain = j.next();
-	        if (testChain.getId() > queryChain.getId()) {
-	          queryChain.computeOverlaps(testChain, overlapAction);
-	          this$1._nOverlaps++;
-	        }
-	        if (this$1._segInt.isDone()) { return null }
-	      }
-	    }
-	  };
-	  MCIndexNoder.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  MCIndexNoder.prototype.getClass = function getClass () {
-	    return MCIndexNoder
-	  };
-	  staticAccessors.SegmentOverlapAction.get = function () { return SegmentOverlapAction };
-
-	  Object.defineProperties( MCIndexNoder, staticAccessors );
-
-	  return MCIndexNoder;
-	}(SinglePassNoder));
-
-	var SegmentOverlapAction = (function (MonotoneChainOverlapAction$$1) {
-	  function SegmentOverlapAction () {
-	    MonotoneChainOverlapAction$$1.call(this);
-	    this._si = null;
-	    var si = arguments[0];
-	    this._si = si;
-	  }
-
-	  if ( MonotoneChainOverlapAction$$1 ) { SegmentOverlapAction.__proto__ = MonotoneChainOverlapAction$$1; }
-	  SegmentOverlapAction.prototype = Object.create( MonotoneChainOverlapAction$$1 && MonotoneChainOverlapAction$$1.prototype );
-	  SegmentOverlapAction.prototype.constructor = SegmentOverlapAction;
-	  SegmentOverlapAction.prototype.overlap = function overlap () {
-	    if (arguments.length === 4) {
-	      var mc1 = arguments[0];
-	      var start1 = arguments[1];
-	      var mc2 = arguments[2];
-	      var start2 = arguments[3];
-	      var ss1 = mc1.getContext();
-	      var ss2 = mc2.getContext();
-	      this._si.processIntersections(ss1, start1, ss2, start2);
-	    } else { return MonotoneChainOverlapAction$$1.prototype.overlap.apply(this, arguments) }
-	  };
-	  SegmentOverlapAction.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  SegmentOverlapAction.prototype.getClass = function getClass () {
-	    return SegmentOverlapAction
-	  };
-
-	  return SegmentOverlapAction;
-	}(MonotoneChainOverlapAction));
+	        if (!isCollapsing) {
+	          var containerWidth = container.node().getBoundingClientRect().width;
+	          var widthPct = sidebarWidth / containerWidth * 100;
+	          selection.style(xMarginProperty, null).style('width', widthPct + '%');
+	        }
+	      });
+	    }; // toggle the sidebar collapse when double-clicking the resizer
 
-	var BufferParameters = function BufferParameters () {
-	  this._quadrantSegments = BufferParameters.DEFAULT_QUADRANT_SEGMENTS;
-	  this._endCapStyle = BufferParameters.CAP_ROUND;
-	  this._joinStyle = BufferParameters.JOIN_ROUND;
-	  this._mitreLimit = BufferParameters.DEFAULT_MITRE_LIMIT;
-	  this._isSingleSided = false;
-	  this._simplifyFactor = BufferParameters.DEFAULT_SIMPLIFY_FACTOR;
 
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var quadrantSegments = arguments[0];
-	    this.setQuadrantSegments(quadrantSegments);
-	  } else if (arguments.length === 2) {
-	    var quadrantSegments$1 = arguments[0];
-	    var endCapStyle = arguments[1];
-	    this.setQuadrantSegments(quadrantSegments$1);
-	    this.setEndCapStyle(endCapStyle);
-	  } else if (arguments.length === 4) {
-	    var quadrantSegments$2 = arguments[0];
-	    var endCapStyle$1 = arguments[1];
-	    var joinStyle = arguments[2];
-	    var mitreLimit = arguments[3];
-	    this.setQuadrantSegments(quadrantSegments$2);
-	    this.setEndCapStyle(endCapStyle$1);
-	    this.setJoinStyle(joinStyle);
-	    this.setMitreLimit(mitreLimit);
-	  }
-	};
+	    resizer.on('dblclick', sidebar.toggle); // ensure hover sidebar is closed when zooming out beyond editable zoom
 
-	var staticAccessors$25 = { CAP_ROUND: { configurable: true },CAP_FLAT: { configurable: true },CAP_SQUARE: { configurable: true },JOIN_ROUND: { configurable: true },JOIN_MITRE: { configurable: true },JOIN_BEVEL: { configurable: true },DEFAULT_QUADRANT_SEGMENTS: { configurable: true },DEFAULT_MITRE_LIMIT: { configurable: true },DEFAULT_SIMPLIFY_FACTOR: { configurable: true } };
-	BufferParameters.prototype.getEndCapStyle = function getEndCapStyle () {
-	  return this._endCapStyle
-	};
-	BufferParameters.prototype.isSingleSided = function isSingleSided () {
-	  return this._isSingleSided
-	};
-	BufferParameters.prototype.setQuadrantSegments = function setQuadrantSegments (quadSegs) {
-	  this._quadrantSegments = quadSegs;
-	  if (this._quadrantSegments === 0) { this._joinStyle = BufferParameters.JOIN_BEVEL; }
-	  if (this._quadrantSegments < 0) {
-	    this._joinStyle = BufferParameters.JOIN_MITRE;
-	    this._mitreLimit = Math.abs(this._quadrantSegments);
-	  }
-	  if (quadSegs <= 0) {
-	    this._quadrantSegments = 1;
-	  }
-	  if (this._joinStyle !== BufferParameters.JOIN_ROUND) {
-	    this._quadrantSegments = BufferParameters.DEFAULT_QUADRANT_SEGMENTS;
+	    context.map().on('crossEditableZoom.sidebar', function (within) {
+	      if (!within && !selection.select('.inspector-hover').empty()) {
+	        hover([]);
+	      }
+	    });
 	  }
-	};
-	BufferParameters.prototype.getJoinStyle = function getJoinStyle () {
-	  return this._joinStyle
-	};
-	BufferParameters.prototype.setJoinStyle = function setJoinStyle (joinStyle) {
-	  this._joinStyle = joinStyle;
-	};
-	BufferParameters.prototype.setSimplifyFactor = function setSimplifyFactor (simplifyFactor) {
-	  this._simplifyFactor = simplifyFactor < 0 ? 0 : simplifyFactor;
-	};
-	BufferParameters.prototype.getSimplifyFactor = function getSimplifyFactor () {
-	  return this._simplifyFactor
-	};
-	BufferParameters.prototype.getQuadrantSegments = function getQuadrantSegments () {
-	  return this._quadrantSegments
-	};
-	BufferParameters.prototype.setEndCapStyle = function setEndCapStyle (endCapStyle) {
-	  this._endCapStyle = endCapStyle;
-	};
-	BufferParameters.prototype.getMitreLimit = function getMitreLimit () {
-	  return this._mitreLimit
-	};
-	BufferParameters.prototype.setMitreLimit = function setMitreLimit (mitreLimit) {
-	  this._mitreLimit = mitreLimit;
-	};
-	BufferParameters.prototype.setSingleSided = function setSingleSided (isSingleSided) {
-	  this._isSingleSided = isSingleSided;
-	};
-	BufferParameters.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferParameters.prototype.getClass = function getClass () {
-	  return BufferParameters
-	};
-	BufferParameters.bufferDistanceError = function bufferDistanceError (quadSegs) {
-	  var alpha = Math.PI / 2.0 / quadSegs;
-	  return 1 - Math.cos(alpha / 2.0)
-	};
-	staticAccessors$25.CAP_ROUND.get = function () { return 1 };
-	staticAccessors$25.CAP_FLAT.get = function () { return 2 };
-	staticAccessors$25.CAP_SQUARE.get = function () { return 3 };
-	staticAccessors$25.JOIN_ROUND.get = function () { return 1 };
-	staticAccessors$25.JOIN_MITRE.get = function () { return 2 };
-	staticAccessors$25.JOIN_BEVEL.get = function () { return 3 };
-	staticAccessors$25.DEFAULT_QUADRANT_SEGMENTS.get = function () { return 8 };
-	staticAccessors$25.DEFAULT_MITRE_LIMIT.get = function () { return 5.0 };
-	staticAccessors$25.DEFAULT_SIMPLIFY_FACTOR.get = function () { return 0.01 };
-
-	Object.defineProperties( BufferParameters, staticAccessors$25 );
-
-	var BufferInputLineSimplifier = function BufferInputLineSimplifier (inputLine) {
-	  this._distanceTol = null;
-	  this._isDeleted = null;
-	  this._angleOrientation = CGAlgorithms.COUNTERCLOCKWISE;
-	  this._inputLine = inputLine || null;
-	};
 
-	var staticAccessors$26 = { INIT: { configurable: true },DELETE: { configurable: true },KEEP: { configurable: true },NUM_PTS_TO_CHECK: { configurable: true } };
-	BufferInputLineSimplifier.prototype.isDeletable = function isDeletable (i0, i1, i2, distanceTol) {
-	  var p0 = this._inputLine[i0];
-	  var p1 = this._inputLine[i1];
-	  var p2 = this._inputLine[i2];
-	  if (!this.isConcave(p0, p1, p2)) { return false }
-	  if (!this.isShallow(p0, p1, p2, distanceTol)) { return false }
-	  return this.isShallowSampled(p0, p1, i0, i2, distanceTol)
-	};
-	BufferInputLineSimplifier.prototype.deleteShallowConcavities = function deleteShallowConcavities () {
-	    var this$1 = this;
+	  sidebar.showPresetList = function () {};
 
-	  var index = 1;
-	  // const maxIndex = this._inputLine.length - 1
-	  var midIndex = this.findNextNonDeletedIndex(index);
-	  var lastIndex = this.findNextNonDeletedIndex(midIndex);
-	  var isChanged = false;
-	  while (lastIndex < this._inputLine.length) {
-	    var isMiddleVertexDeleted = false;
-	    if (this$1.isDeletable(index, midIndex, lastIndex, this$1._distanceTol)) {
-	      this$1._isDeleted[midIndex] = BufferInputLineSimplifier.DELETE;
-	      isMiddleVertexDeleted = true;
-	      isChanged = true;
-	    }
-	    if (isMiddleVertexDeleted) { index = lastIndex; } else { index = midIndex; }
-	    midIndex = this$1.findNextNonDeletedIndex(index);
-	    lastIndex = this$1.findNextNonDeletedIndex(midIndex);
-	  }
-	  return isChanged
-	};
-	BufferInputLineSimplifier.prototype.isShallowConcavity = function isShallowConcavity (p0, p1, p2, distanceTol) {
-	  var orientation = CGAlgorithms.computeOrientation(p0, p1, p2);
-	  var isAngleToSimplify = orientation === this._angleOrientation;
-	  if (!isAngleToSimplify) { return false }
-	  var dist = CGAlgorithms.distancePointLine(p1, p0, p2);
-	  return dist < distanceTol
-	};
-	BufferInputLineSimplifier.prototype.isShallowSampled = function isShallowSampled (p0, p2, i0, i2, distanceTol) {
-	    var this$1 = this;
+	  sidebar.hover = function () {};
 
-	  var inc = Math.trunc((i2 - i0) / BufferInputLineSimplifier.NUM_PTS_TO_CHECK);
-	  if (inc <= 0) { inc = 1; }
-	  for (var i = i0; i < i2; i += inc) {
-	    if (!this$1.isShallow(p0, p2, this$1._inputLine[i], distanceTol)) { return false }
-	  }
-	  return true
-	};
-	BufferInputLineSimplifier.prototype.isConcave = function isConcave (p0, p1, p2) {
-	  var orientation = CGAlgorithms.computeOrientation(p0, p1, p2);
-	  var isConcave = orientation === this._angleOrientation;
-	  return isConcave
-	};
-	BufferInputLineSimplifier.prototype.simplify = function simplify (distanceTol) {
-	    var this$1 = this;
+	  sidebar.hover.cancel = function () {};
 
-	  this._distanceTol = Math.abs(distanceTol);
-	  if (distanceTol < 0) { this._angleOrientation = CGAlgorithms.CLOCKWISE; }
-	  this._isDeleted = new Array(this._inputLine.length).fill(null);
-	  var isChanged = false;
-	  do {
-	    isChanged = this$1.deleteShallowConcavities();
-	  } while (isChanged)
-	  return this.collapseLine()
-	};
-	BufferInputLineSimplifier.prototype.findNextNonDeletedIndex = function findNextNonDeletedIndex (index) {
-	  var next = index + 1;
-	  while (next < this._inputLine.length && this._isDeleted[next] === BufferInputLineSimplifier.DELETE) { next++; }
-	  return next
-	};
-	BufferInputLineSimplifier.prototype.isShallow = function isShallow (p0, p1, p2, distanceTol) {
-	  var dist = CGAlgorithms.distancePointLine(p1, p0, p2);
-	  return dist < distanceTol
-	};
-	BufferInputLineSimplifier.prototype.collapseLine = function collapseLine () {
-	    var this$1 = this;
+	  sidebar.intersects = function () {};
 
-	  var coordList = new CoordinateList();
-	  for (var i = 0; i < this._inputLine.length; i++) {
-	    if (this$1._isDeleted[i] !== BufferInputLineSimplifier.DELETE) { coordList.add(this$1._inputLine[i]); }
-	  }
-	  return coordList.toCoordinateArray()
-	};
-	BufferInputLineSimplifier.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferInputLineSimplifier.prototype.getClass = function getClass () {
-	  return BufferInputLineSimplifier
-	};
-	BufferInputLineSimplifier.simplify = function simplify (inputLine, distanceTol) {
-	  var simp = new BufferInputLineSimplifier(inputLine);
-	  return simp.simplify(distanceTol)
-	};
-	staticAccessors$26.INIT.get = function () { return 0 };
-	staticAccessors$26.DELETE.get = function () { return 1 };
-	staticAccessors$26.KEEP.get = function () { return 1 };
-	staticAccessors$26.NUM_PTS_TO_CHECK.get = function () { return 10 };
-
-	Object.defineProperties( BufferInputLineSimplifier, staticAccessors$26 );
-
-	var OffsetSegmentString = function OffsetSegmentString () {
-	  this._ptList = null;
-	  this._precisionModel = null;
-	  this._minimimVertexDistance = 0.0;
-	  this._ptList = new ArrayList();
-	};
+	  sidebar.select = function () {};
 
-	var staticAccessors$28 = { COORDINATE_ARRAY_TYPE: { configurable: true } };
-	OffsetSegmentString.prototype.getCoordinates = function getCoordinates () {
-	  var coord = this._ptList.toArray(OffsetSegmentString.COORDINATE_ARRAY_TYPE);
-	  return coord
-	};
-	OffsetSegmentString.prototype.setPrecisionModel = function setPrecisionModel (precisionModel) {
-	  this._precisionModel = precisionModel;
-	};
-	OffsetSegmentString.prototype.addPt = function addPt (pt) {
-	  var bufPt = new Coordinate(pt);
-	  this._precisionModel.makePrecise(bufPt);
-	  if (this.isRedundant(bufPt)) { return null }
-	  this._ptList.add(bufPt);
-	};
-	OffsetSegmentString.prototype.revere = function revere () {};
-	OffsetSegmentString.prototype.addPts = function addPts (pt, isForward) {
-	    var this$1 = this;
+	  sidebar.show = function () {};
 
-	  if (isForward) {
-	    for (var i = 0; i < pt.length; i++) {
-	      this$1.addPt(pt[i]);
-	    }
-	  } else {
-	    for (var i$1 = pt.length - 1; i$1 >= 0; i$1--) {
-	      this$1.addPt(pt[i$1]);
-	    }
-	  }
-	};
-	OffsetSegmentString.prototype.isRedundant = function isRedundant (pt) {
-	  if (this._ptList.size() < 1) { return false }
-	  var lastPt = this._ptList.get(this._ptList.size() - 1);
-	  var ptDist = pt.distance(lastPt);
-	  if (ptDist < this._minimimVertexDistance) { return true }
-	  return false
-	};
-	OffsetSegmentString.prototype.toString = function toString () {
-	  var fact = new GeometryFactory();
-	  var line = fact.createLineString(this.getCoordinates());
-	  return line.toString()
-	};
-	OffsetSegmentString.prototype.closeRing = function closeRing () {
-	  if (this._ptList.size() < 1) { return null }
-	  var startPt = new Coordinate(this._ptList.get(0));
-	  var lastPt = this._ptList.get(this._ptList.size() - 1);
-	  // const last2Pt = null
-	  // if (this._ptList.size() >= 2) last2Pt = this._ptList.get(this._ptList.size() - 2)
-	  if (startPt.equals(lastPt)) { return null }
-	  this._ptList.add(startPt);
-	};
-	OffsetSegmentString.prototype.setMinimumVertexDistance = function setMinimumVertexDistance (minimimVertexDistance) {
-	  this._minimimVertexDistance = minimimVertexDistance;
-	};
-	OffsetSegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetSegmentString.prototype.getClass = function getClass () {
-	  return OffsetSegmentString
-	};
-	staticAccessors$28.COORDINATE_ARRAY_TYPE.get = function () { return new Array(0).fill(null) };
+	  sidebar.hide = function () {};
 
-	Object.defineProperties( OffsetSegmentString, staticAccessors$28 );
+	  sidebar.expand = function () {};
 
-	var Angle = function Angle () {};
+	  sidebar.collapse = function () {};
 
-	var staticAccessors$29 = { PI_TIMES_2: { configurable: true },PI_OVER_2: { configurable: true },PI_OVER_4: { configurable: true },COUNTERCLOCKWISE: { configurable: true },CLOCKWISE: { configurable: true },NONE: { configurable: true } };
+	  sidebar.toggle = function () {};
 
-	Angle.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Angle.prototype.getClass = function getClass () {
-	  return Angle
-	};
-	Angle.toDegrees = function toDegrees (radians) {
-	  return radians * 180 / Math.PI
-	};
-	Angle.normalize = function normalize (angle) {
-	  while (angle > Math.PI) { angle -= Angle.PI_TIMES_2; }
-	  while (angle <= -Math.PI) { angle += Angle.PI_TIMES_2; }
-	  return angle
-	};
-	Angle.angle = function angle () {
-	  if (arguments.length === 1) {
-	    var p = arguments[0];
-	    return Math.atan2(p.y, p.x)
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    var dx = p1.x - p0.x;
-	    var dy = p1.y - p0.y;
-	    return Math.atan2(dy, dx)
-	  }
-	};
-	Angle.isAcute = function isAcute (p0, p1, p2) {
-	  var dx0 = p0.x - p1.x;
-	  var dy0 = p0.y - p1.y;
-	  var dx1 = p2.x - p1.x;
-	  var dy1 = p2.y - p1.y;
-	  var dotprod = dx0 * dx1 + dy0 * dy1;
-	  return dotprod > 0
-	};
-	Angle.isObtuse = function isObtuse (p0, p1, p2) {
-	  var dx0 = p0.x - p1.x;
-	  var dy0 = p0.y - p1.y;
-	  var dx1 = p2.x - p1.x;
-	  var dy1 = p2.y - p1.y;
-	  var dotprod = dx0 * dx1 + dy0 * dy1;
-	  return dotprod < 0
-	};
-	Angle.interiorAngle = function interiorAngle (p0, p1, p2) {
-	  var anglePrev = Angle.angle(p1, p0);
-	  var angleNext = Angle.angle(p1, p2);
-	  return Math.abs(angleNext - anglePrev)
-	};
-	Angle.normalizePositive = function normalizePositive (angle) {
-	  if (angle < 0.0) {
-	    while (angle < 0.0) { angle += Angle.PI_TIMES_2; }
-	    if (angle >= Angle.PI_TIMES_2) { angle = 0.0; }
-	  } else {
-	    while (angle >= Angle.PI_TIMES_2) { angle -= Angle.PI_TIMES_2; }
-	    if (angle < 0.0) { angle = 0.0; }
-	  }
-	  return angle
-	};
-	Angle.angleBetween = function angleBetween (tip1, tail, tip2) {
-	  var a1 = Angle.angle(tail, tip1);
-	  var a2 = Angle.angle(tail, tip2);
-	  return Angle.diff(a1, a2)
-	};
-	Angle.diff = function diff (ang1, ang2) {
-	  var delAngle = null;
-	  if (ang1 < ang2) {
-	    delAngle = ang2 - ang1;
-	  } else {
-	    delAngle = ang1 - ang2;
-	  }
-	  if (delAngle > Math.PI) {
-	    delAngle = 2 * Math.PI - delAngle;
-	  }
-	  return delAngle
-	};
-	Angle.toRadians = function toRadians (angleDegrees) {
-	  return angleDegrees * Math.PI / 180.0
-	};
-	Angle.getTurn = function getTurn (ang1, ang2) {
-	  var crossproduct = Math.sin(ang2 - ang1);
-	  if (crossproduct > 0) {
-	    return Angle.COUNTERCLOCKWISE
-	  }
-	  if (crossproduct < 0) {
-	    return Angle.CLOCKWISE
-	  }
-	  return Angle.NONE
-	};
-	Angle.angleBetweenOriented = function angleBetweenOriented (tip1, tail, tip2) {
-	  var a1 = Angle.angle(tail, tip1);
-	  var a2 = Angle.angle(tail, tip2);
-	  var angDel = a2 - a1;
-	  if (angDel <= -Math.PI) { return angDel + Angle.PI_TIMES_2 }
-	  if (angDel > Math.PI) { return angDel - Angle.PI_TIMES_2 }
-	  return angDel
-	};
-	staticAccessors$29.PI_TIMES_2.get = function () { return 2.0 * Math.PI };
-	staticAccessors$29.PI_OVER_2.get = function () { return Math.PI / 2.0 };
-	staticAccessors$29.PI_OVER_4.get = function () { return Math.PI / 4.0 };
-	staticAccessors$29.COUNTERCLOCKWISE.get = function () { return CGAlgorithms.COUNTERCLOCKWISE };
-	staticAccessors$29.CLOCKWISE.get = function () { return CGAlgorithms.CLOCKWISE };
-	staticAccessors$29.NONE.get = function () { return CGAlgorithms.COLLINEAR };
-
-	Object.defineProperties( Angle, staticAccessors$29 );
-
-	var OffsetSegmentGenerator = function OffsetSegmentGenerator () {
-	  this._maxCurveSegmentError = 0.0;
-	  this._filletAngleQuantum = null;
-	  this._closingSegLengthFactor = 1;
-	  this._segList = null;
-	  this._distance = 0.0;
-	  this._precisionModel = null;
-	  this._bufParams = null;
-	  this._li = null;
-	  this._s0 = null;
-	  this._s1 = null;
-	  this._s2 = null;
-	  this._seg0 = new LineSegment();
-	  this._seg1 = new LineSegment();
-	  this._offset0 = new LineSegment();
-	  this._offset1 = new LineSegment();
-	  this._side = 0;
-	  this._hasNarrowConcaveAngle = false;
-	  var precisionModel = arguments[0];
-	  var bufParams = arguments[1];
-	  var distance = arguments[2];
-	  this._precisionModel = precisionModel;
-	  this._bufParams = bufParams;
-	  this._li = new RobustLineIntersector();
-	  this._filletAngleQuantum = Math.PI / 2.0 / bufParams.getQuadrantSegments();
-	  if (bufParams.getQuadrantSegments() >= 8 && bufParams.getJoinStyle() === BufferParameters.JOIN_ROUND) { this._closingSegLengthFactor = OffsetSegmentGenerator.MAX_CLOSING_SEG_LEN_FACTOR; }
-	  this.init(distance);
-	};
+	  return sidebar;
+	}
 
-	var staticAccessors$27 = { OFFSET_SEGMENT_SEPARATION_FACTOR: { configurable: true },INSIDE_TURN_VERTEX_SNAP_DISTANCE_FACTOR: { configurable: true },CURVE_VERTEX_SNAP_DISTANCE_FACTOR: { configurable: true },MAX_CLOSING_SEG_LEN_FACTOR: { configurable: true } };
-	OffsetSegmentGenerator.prototype.addNextSegment = function addNextSegment (p, addStartPoint) {
-	  this._s0 = this._s1;
-	  this._s1 = this._s2;
-	  this._s2 = p;
-	  this._seg0.setCoordinates(this._s0, this._s1);
-	  this.computeOffsetSegment(this._seg0, this._side, this._distance, this._offset0);
-	  this._seg1.setCoordinates(this._s1, this._s2);
-	  this.computeOffsetSegment(this._seg1, this._side, this._distance, this._offset1);
-	  if (this._s1.equals(this._s2)) { return null }
-	  var orientation = CGAlgorithms.computeOrientation(this._s0, this._s1, this._s2);
-	  var outsideTurn = (orientation === CGAlgorithms.CLOCKWISE && this._side === Position.LEFT) || (orientation === CGAlgorithms.COUNTERCLOCKWISE && this._side === Position.RIGHT);
-	  if (orientation === 0) {
-	    this.addCollinear(addStartPoint);
-	  } else if (outsideTurn) {
-	    this.addOutsideTurn(orientation, addStartPoint);
-	  } else {
-	    this.addInsideTurn(orientation, addStartPoint);
-	  }
-	};
-	OffsetSegmentGenerator.prototype.addLineEndCap = function addLineEndCap (p0, p1) {
-	  var seg = new LineSegment(p0, p1);
-	  var offsetL = new LineSegment();
-	  this.computeOffsetSegment(seg, Position.LEFT, this._distance, offsetL);
-	  var offsetR = new LineSegment();
-	  this.computeOffsetSegment(seg, Position.RIGHT, this._distance, offsetR);
-	  var dx = p1.x - p0.x;
-	  var dy = p1.y - p0.y;
-	  var angle = Math.atan2(dy, dx);
-	  switch (this._bufParams.getEndCapStyle()) {
-	    case BufferParameters.CAP_ROUND:
-	      this._segList.addPt(offsetL.p1);
-	      this.addFilletArc(p1, angle + Math.PI / 2, angle - Math.PI / 2, CGAlgorithms.CLOCKWISE, this._distance);
-	      this._segList.addPt(offsetR.p1);
-	      break
-	    case BufferParameters.CAP_FLAT:
-	      this._segList.addPt(offsetL.p1);
-	      this._segList.addPt(offsetR.p1);
-	      break
-	    case BufferParameters.CAP_SQUARE:
-	      var squareCapSideOffset = new Coordinate();
-	      squareCapSideOffset.x = Math.abs(this._distance) * Math.cos(angle);
-	      squareCapSideOffset.y = Math.abs(this._distance) * Math.sin(angle);
-	      var squareCapLOffset = new Coordinate(offsetL.p1.x + squareCapSideOffset.x, offsetL.p1.y + squareCapSideOffset.y);
-	      var squareCapROffset = new Coordinate(offsetR.p1.x + squareCapSideOffset.x, offsetR.p1.y + squareCapSideOffset.y);
-	      this._segList.addPt(squareCapLOffset);
-	      this._segList.addPt(squareCapROffset);
-	      break
-	  }
-	};
-	OffsetSegmentGenerator.prototype.getCoordinates = function getCoordinates () {
-	  var pts = this._segList.getCoordinates();
-	  return pts
-	};
-	OffsetSegmentGenerator.prototype.addMitreJoin = function addMitreJoin (p, offset0, offset1, distance) {
-	  var isMitreWithinLimit = true;
-	  var intPt = null;
-	  try {
-	    intPt = HCoordinate.intersection(offset0.p0, offset0.p1, offset1.p0, offset1.p1);
-	    var mitreRatio = distance <= 0.0 ? 1.0 : intPt.distance(p) / Math.abs(distance);
-	    if (mitreRatio > this._bufParams.getMitreLimit()) { isMitreWithinLimit = false; }
-	  } catch (ex) {
-	    if (ex instanceof NotRepresentableException) {
-	      intPt = new Coordinate(0, 0);
-	      isMitreWithinLimit = false;
-	    } else { throw ex }
-	  } finally {}
-	  if (isMitreWithinLimit) {
-	    this._segList.addPt(intPt);
-	  } else {
-	    this.addLimitedMitreJoin(offset0, offset1, distance, this._bufParams.getMitreLimit());
-	  }
-	};
-	OffsetSegmentGenerator.prototype.addFilletCorner = function addFilletCorner (p, p0, p1, direction, radius) {
-	  var dx0 = p0.x - p.x;
-	  var dy0 = p0.y - p.y;
-	  var startAngle = Math.atan2(dy0, dx0);
-	  var dx1 = p1.x - p.x;
-	  var dy1 = p1.y - p.y;
-	  var endAngle = Math.atan2(dy1, dx1);
-	  if (direction === CGAlgorithms.CLOCKWISE) {
-	    if (startAngle <= endAngle) { startAngle += 2.0 * Math.PI; }
-	  } else {
-	    if (startAngle >= endAngle) { startAngle -= 2.0 * Math.PI; }
-	  }
-	  this._segList.addPt(p0);
-	  this.addFilletArc(p, startAngle, endAngle, direction, radius);
-	  this._segList.addPt(p1);
-	};
-	OffsetSegmentGenerator.prototype.addOutsideTurn = function addOutsideTurn (orientation, addStartPoint) {
-	  if (this._offset0.p1.distance(this._offset1.p0) < this._distance * OffsetSegmentGenerator.OFFSET_SEGMENT_SEPARATION_FACTOR) {
-	    this._segList.addPt(this._offset0.p1);
-	    return null
-	  }
-	  if (this._bufParams.getJoinStyle() === BufferParameters.JOIN_MITRE) {
-	    this.addMitreJoin(this._s1, this._offset0, this._offset1, this._distance);
-	  } else if (this._bufParams.getJoinStyle() === BufferParameters.JOIN_BEVEL) {
-	    this.addBevelJoin(this._offset0, this._offset1);
-	  } else {
-	    if (addStartPoint) { this._segList.addPt(this._offset0.p1); }
-	    this.addFilletCorner(this._s1, this._offset0.p1, this._offset1.p0, orientation, this._distance);
-	    this._segList.addPt(this._offset1.p0);
-	  }
-	};
-	OffsetSegmentGenerator.prototype.createSquare = function createSquare (p) {
-	  this._segList.addPt(new Coordinate(p.x + this._distance, p.y + this._distance));
-	  this._segList.addPt(new Coordinate(p.x + this._distance, p.y - this._distance));
-	  this._segList.addPt(new Coordinate(p.x - this._distance, p.y - this._distance));
-	  this._segList.addPt(new Coordinate(p.x - this._distance, p.y + this._distance));
-	  this._segList.closeRing();
-	};
-	OffsetSegmentGenerator.prototype.addSegments = function addSegments (pt, isForward) {
-	  this._segList.addPts(pt, isForward);
-	};
-	OffsetSegmentGenerator.prototype.addFirstSegment = function addFirstSegment () {
-	  this._segList.addPt(this._offset1.p0);
-	};
-	OffsetSegmentGenerator.prototype.addLastSegment = function addLastSegment () {
-	  this._segList.addPt(this._offset1.p1);
-	};
-	OffsetSegmentGenerator.prototype.initSideSegments = function initSideSegments (s1, s2, side) {
-	  this._s1 = s1;
-	  this._s2 = s2;
-	  this._side = side;
-	  this._seg1.setCoordinates(s1, s2);
-	  this.computeOffsetSegment(this._seg1, side, this._distance, this._offset1);
-	};
-	OffsetSegmentGenerator.prototype.addLimitedMitreJoin = function addLimitedMitreJoin (offset0, offset1, distance, mitreLimit) {
-	  var basePt = this._seg0.p1;
-	  var ang0 = Angle.angle(basePt, this._seg0.p0);
-	  // const ang1 = Angle.angle(basePt, this._seg1.p1)
-	  var angDiff = Angle.angleBetweenOriented(this._seg0.p0, basePt, this._seg1.p1);
-	  var angDiffHalf = angDiff / 2;
-	  var midAng = Angle.normalize(ang0 + angDiffHalf);
-	  var mitreMidAng = Angle.normalize(midAng + Math.PI);
-	  var mitreDist = mitreLimit * distance;
-	  var bevelDelta = mitreDist * Math.abs(Math.sin(angDiffHalf));
-	  var bevelHalfLen = distance - bevelDelta;
-	  var bevelMidX = basePt.x + mitreDist * Math.cos(mitreMidAng);
-	  var bevelMidY = basePt.y + mitreDist * Math.sin(mitreMidAng);
-	  var bevelMidPt = new Coordinate(bevelMidX, bevelMidY);
-	  var mitreMidLine = new LineSegment(basePt, bevelMidPt);
-	  var bevelEndLeft = mitreMidLine.pointAlongOffset(1.0, bevelHalfLen);
-	  var bevelEndRight = mitreMidLine.pointAlongOffset(1.0, -bevelHalfLen);
-	  if (this._side === Position.LEFT) {
-	    this._segList.addPt(bevelEndLeft);
-	    this._segList.addPt(bevelEndRight);
-	  } else {
-	    this._segList.addPt(bevelEndRight);
-	    this._segList.addPt(bevelEndLeft);
-	  }
-	};
-	OffsetSegmentGenerator.prototype.computeOffsetSegment = function computeOffsetSegment (seg, side, distance, offset) {
-	  var sideSign = side === Position.LEFT ? 1 : -1;
-	  var dx = seg.p1.x - seg.p0.x;
-	  var dy = seg.p1.y - seg.p0.y;
-	  var len = Math.sqrt(dx * dx + dy * dy);
-	  var ux = sideSign * distance * dx / len;
-	  var uy = sideSign * distance * dy / len;
-	  offset.p0.x = seg.p0.x - uy;
-	  offset.p0.y = seg.p0.y + ux;
-	  offset.p1.x = seg.p1.x - uy;
-	  offset.p1.y = seg.p1.y + ux;
-	};
-	OffsetSegmentGenerator.prototype.addFilletArc = function addFilletArc (p, startAngle, endAngle, direction, radius) {
-	    var this$1 = this;
-
-	  var directionFactor = direction === CGAlgorithms.CLOCKWISE ? -1 : 1;
-	  var totalAngle = Math.abs(startAngle - endAngle);
-	  var nSegs = Math.trunc(totalAngle / this._filletAngleQuantum + 0.5);
-	  if (nSegs < 1) { return null }
-	  var initAngle = 0.0;
-	  var currAngleInc = totalAngle / nSegs;
-	  var currAngle = initAngle;
-	  var pt = new Coordinate();
-	  while (currAngle < totalAngle) {
-	    var angle = startAngle + directionFactor * currAngle;
-	    pt.x = p.x + radius * Math.cos(angle);
-	    pt.y = p.y + radius * Math.sin(angle);
-	    this$1._segList.addPt(pt);
-	    currAngle += currAngleInc;
-	  }
-	};
-	OffsetSegmentGenerator.prototype.addInsideTurn = function addInsideTurn (orientation, addStartPoint) {
-	  this._li.computeIntersection(this._offset0.p0, this._offset0.p1, this._offset1.p0, this._offset1.p1);
-	  if (this._li.hasIntersection()) {
-	    this._segList.addPt(this._li.getIntersection(0));
-	  } else {
-	    this._hasNarrowConcaveAngle = true;
-	    if (this._offset0.p1.distance(this._offset1.p0) < this._distance * OffsetSegmentGenerator.INSIDE_TURN_VERTEX_SNAP_DISTANCE_FACTOR) {
-	      this._segList.addPt(this._offset0.p1);
-	    } else {
-	      this._segList.addPt(this._offset0.p1);
-	      if (this._closingSegLengthFactor > 0) {
-	        var mid0 = new Coordinate((this._closingSegLengthFactor * this._offset0.p1.x + this._s1.x) / (this._closingSegLengthFactor + 1), (this._closingSegLengthFactor * this._offset0.p1.y + this._s1.y) / (this._closingSegLengthFactor + 1));
-	        this._segList.addPt(mid0);
-	        var mid1 = new Coordinate((this._closingSegLengthFactor * this._offset1.p0.x + this._s1.x) / (this._closingSegLengthFactor + 1), (this._closingSegLengthFactor * this._offset1.p0.y + this._s1.y) / (this._closingSegLengthFactor + 1));
-	        this._segList.addPt(mid1);
-	      } else {
-	        this._segList.addPt(this._s1);
-	      }
-	      this._segList.addPt(this._offset1.p0);
-	    }
-	  }
-	};
-	OffsetSegmentGenerator.prototype.createCircle = function createCircle (p) {
-	  var pt = new Coordinate(p.x + this._distance, p.y);
-	  this._segList.addPt(pt);
-	  this.addFilletArc(p, 0.0, 2.0 * Math.PI, -1, this._distance);
-	  this._segList.closeRing();
-	};
-	OffsetSegmentGenerator.prototype.addBevelJoin = function addBevelJoin (offset0, offset1) {
-	  this._segList.addPt(offset0.p1);
-	  this._segList.addPt(offset1.p0);
-	};
-	OffsetSegmentGenerator.prototype.init = function init (distance) {
-	  this._distance = distance;
-	  this._maxCurveSegmentError = distance * (1 - Math.cos(this._filletAngleQuantum / 2.0));
-	  this._segList = new OffsetSegmentString();
-	  this._segList.setPrecisionModel(this._precisionModel);
-	  this._segList.setMinimumVertexDistance(distance * OffsetSegmentGenerator.CURVE_VERTEX_SNAP_DISTANCE_FACTOR);
-	};
-	OffsetSegmentGenerator.prototype.addCollinear = function addCollinear (addStartPoint) {
-	  this._li.computeIntersection(this._s0, this._s1, this._s1, this._s2);
-	  var numInt = this._li.getIntersectionNum();
-	  if (numInt >= 2) {
-	    if (this._bufParams.getJoinStyle() === BufferParameters.JOIN_BEVEL || this._bufParams.getJoinStyle() === BufferParameters.JOIN_MITRE) {
-	      if (addStartPoint) { this._segList.addPt(this._offset0.p1); }
-	      this._segList.addPt(this._offset1.p0);
-	    } else {
-	      this.addFilletCorner(this._s1, this._offset0.p1, this._offset1.p0, CGAlgorithms.CLOCKWISE, this._distance);
-	    }
-	  }
-	};
-	OffsetSegmentGenerator.prototype.closeRing = function closeRing () {
-	  this._segList.closeRing();
-	};
-	OffsetSegmentGenerator.prototype.hasNarrowConcaveAngle = function hasNarrowConcaveAngle () {
-	  return this._hasNarrowConcaveAngle
-	};
-	OffsetSegmentGenerator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetSegmentGenerator.prototype.getClass = function getClass () {
-	  return OffsetSegmentGenerator
-	};
-	staticAccessors$27.OFFSET_SEGMENT_SEPARATION_FACTOR.get = function () { return 1.0E-3 };
-	staticAccessors$27.INSIDE_TURN_VERTEX_SNAP_DISTANCE_FACTOR.get = function () { return 1.0E-3 };
-	staticAccessors$27.CURVE_VERTEX_SNAP_DISTANCE_FACTOR.get = function () { return 1.0E-6 };
-	staticAccessors$27.MAX_CLOSING_SEG_LEN_FACTOR.get = function () { return 80 };
-
-	Object.defineProperties( OffsetSegmentGenerator, staticAccessors$27 );
-
-	var OffsetCurveBuilder = function OffsetCurveBuilder () {
-	  this._distance = 0.0;
-	  this._precisionModel = null;
-	  this._bufParams = null;
-	  var precisionModel = arguments[0];
-	  var bufParams = arguments[1];
-	  this._precisionModel = precisionModel;
-	  this._bufParams = bufParams;
-	};
-	OffsetCurveBuilder.prototype.getOffsetCurve = function getOffsetCurve (inputPts, distance) {
-	  this._distance = distance;
-	  if (distance === 0.0) { return null }
-	  var isRightSide = distance < 0.0;
-	  var posDistance = Math.abs(distance);
-	  var segGen = this.getSegGen(posDistance);
-	  if (inputPts.length <= 1) {
-	    this.computePointCurve(inputPts[0], segGen);
-	  } else {
-	    this.computeOffsetCurve(inputPts, isRightSide, segGen);
-	  }
-	  var curvePts = segGen.getCoordinates();
-	  if (isRightSide) { CoordinateArrays.reverse(curvePts); }
-	  return curvePts
-	};
-	OffsetCurveBuilder.prototype.computeSingleSidedBufferCurve = function computeSingleSidedBufferCurve (inputPts, isRightSide, segGen) {
-	  var distTol = this.simplifyTolerance(this._distance);
-	  if (isRightSide) {
-	    segGen.addSegments(inputPts, true);
-	    var simp2 = BufferInputLineSimplifier.simplify(inputPts, -distTol);
-	    var n2 = simp2.length - 1;
-	    segGen.initSideSegments(simp2[n2], simp2[n2 - 1], Position.LEFT);
-	    segGen.addFirstSegment();
-	    for (var i = n2 - 2; i >= 0; i--) {
-	      segGen.addNextSegment(simp2[i], true);
-	    }
-	  } else {
-	    segGen.addSegments(inputPts, false);
-	    var simp1 = BufferInputLineSimplifier.simplify(inputPts, distTol);
-	    var n1 = simp1.length - 1;
-	    segGen.initSideSegments(simp1[0], simp1[1], Position.LEFT);
-	    segGen.addFirstSegment();
-	    for (var i$1 = 2; i$1 <= n1; i$1++) {
-	      segGen.addNextSegment(simp1[i$1], true);
-	    }
-	  }
-	  segGen.addLastSegment();
-	  segGen.closeRing();
-	};
-	OffsetCurveBuilder.prototype.computeRingBufferCurve = function computeRingBufferCurve (inputPts, side, segGen) {
-	  var distTol = this.simplifyTolerance(this._distance);
-	  if (side === Position.RIGHT) { distTol = -distTol; }
-	  var simp = BufferInputLineSimplifier.simplify(inputPts, distTol);
-	  var n = simp.length - 1;
-	  segGen.initSideSegments(simp[n - 1], simp[0], side);
-	  for (var i = 1; i <= n; i++) {
-	    var addStartPoint = i !== 1;
-	    segGen.addNextSegment(simp[i], addStartPoint);
-	  }
-	  segGen.closeRing();
-	};
-	OffsetCurveBuilder.prototype.computeLineBufferCurve = function computeLineBufferCurve (inputPts, segGen) {
-	  var distTol = this.simplifyTolerance(this._distance);
-	  var simp1 = BufferInputLineSimplifier.simplify(inputPts, distTol);
-	  var n1 = simp1.length - 1;
-	  segGen.initSideSegments(simp1[0], simp1[1], Position.LEFT);
-	  for (var i = 2; i <= n1; i++) {
-	    segGen.addNextSegment(simp1[i], true);
-	  }
-	  segGen.addLastSegment();
-	  segGen.addLineEndCap(simp1[n1 - 1], simp1[n1]);
-	  var simp2 = BufferInputLineSimplifier.simplify(inputPts, -distTol);
-	  var n2 = simp2.length - 1;
-	  segGen.initSideSegments(simp2[n2], simp2[n2 - 1], Position.LEFT);
-	  for (var i$1 = n2 - 2; i$1 >= 0; i$1--) {
-	    segGen.addNextSegment(simp2[i$1], true);
-	  }
-	  segGen.addLastSegment();
-	  segGen.addLineEndCap(simp2[1], simp2[0]);
-	  segGen.closeRing();
-	};
-	OffsetCurveBuilder.prototype.computePointCurve = function computePointCurve (pt, segGen) {
-	  switch (this._bufParams.getEndCapStyle()) {
-	    case BufferParameters.CAP_ROUND:
-	      segGen.createCircle(pt);
-	      break
-	    case BufferParameters.CAP_SQUARE:
-	      segGen.createSquare(pt);
-	      break
-	  }
-	};
-	OffsetCurveBuilder.prototype.getLineCurve = function getLineCurve (inputPts, distance) {
-	  this._distance = distance;
-	  if (distance < 0.0 && !this._bufParams.isSingleSided()) { return null }
-	  if (distance === 0.0) { return null }
-	  var posDistance = Math.abs(distance);
-	  var segGen = this.getSegGen(posDistance);
-	  if (inputPts.length <= 1) {
-	    this.computePointCurve(inputPts[0], segGen);
-	  } else {
-	    if (this._bufParams.isSingleSided()) {
-	      var isRightSide = distance < 0.0;
-	      this.computeSingleSidedBufferCurve(inputPts, isRightSide, segGen);
-	    } else { this.computeLineBufferCurve(inputPts, segGen); }
-	  }
-	  var lineCoord = segGen.getCoordinates();
-	  return lineCoord
-	};
-	OffsetCurveBuilder.prototype.getBufferParameters = function getBufferParameters () {
-	  return this._bufParams
-	};
-	OffsetCurveBuilder.prototype.simplifyTolerance = function simplifyTolerance (bufDistance) {
-	  return bufDistance * this._bufParams.getSimplifyFactor()
-	};
-	OffsetCurveBuilder.prototype.getRingCurve = function getRingCurve (inputPts, side, distance) {
-	  this._distance = distance;
-	  if (inputPts.length <= 2) { return this.getLineCurve(inputPts, distance) }
-	  if (distance === 0.0) {
-	    return OffsetCurveBuilder.copyCoordinates(inputPts)
-	  }
-	  var segGen = this.getSegGen(distance);
-	  this.computeRingBufferCurve(inputPts, side, segGen);
-	  return segGen.getCoordinates()
-	};
-	OffsetCurveBuilder.prototype.computeOffsetCurve = function computeOffsetCurve (inputPts, isRightSide, segGen) {
-	  var distTol = this.simplifyTolerance(this._distance);
-	  if (isRightSide) {
-	    var simp2 = BufferInputLineSimplifier.simplify(inputPts, -distTol);
-	    var n2 = simp2.length - 1;
-	    segGen.initSideSegments(simp2[n2], simp2[n2 - 1], Position.LEFT);
-	    segGen.addFirstSegment();
-	    for (var i = n2 - 2; i >= 0; i--) {
-	      segGen.addNextSegment(simp2[i], true);
-	    }
-	  } else {
-	    var simp1 = BufferInputLineSimplifier.simplify(inputPts, distTol);
-	    var n1 = simp1.length - 1;
-	    segGen.initSideSegments(simp1[0], simp1[1], Position.LEFT);
-	    segGen.addFirstSegment();
-	    for (var i$1 = 2; i$1 <= n1; i$1++) {
-	      segGen.addNextSegment(simp1[i$1], true);
-	    }
-	  }
-	  segGen.addLastSegment();
-	};
-	OffsetCurveBuilder.prototype.getSegGen = function getSegGen (distance) {
-	  return new OffsetSegmentGenerator(this._precisionModel, this._bufParams, distance)
-	};
-	OffsetCurveBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetCurveBuilder.prototype.getClass = function getClass () {
-	  return OffsetCurveBuilder
-	};
-	OffsetCurveBuilder.copyCoordinates = function copyCoordinates (pts) {
-	  var copy = new Array(pts.length).fill(null);
-	  for (var i = 0; i < copy.length; i++) {
-	    copy[i] = new Coordinate(pts[i]);
+	function uiSourceSwitch(context) {
+	  var keys;
+
+	  function click(d3_event) {
+	    d3_event.preventDefault();
+	    var osm = context.connection();
+	    if (!osm) return;
+	    if (context.inIntro()) return;
+	    if (context.history().hasChanges() && !window.confirm(_t('source_switch.lose_changes'))) return;
+	    var isLive = select(this).classed('live');
+	    isLive = !isLive;
+	    context.enter(modeBrowse(context));
+	    context.history().clearSaved(); // remove saved history
+
+	    context.flush(); // remove stored data
+
+	    select(this).html(isLive ? _t.html('source_switch.live') : _t.html('source_switch.dev')).classed('live', isLive).classed('chip', isLive);
+	    osm["switch"](isLive ? keys[0] : keys[1]); // switch connection (warning: dispatches 'change' event)
 	  }
-	  return copy
-	};
 
-	var SubgraphDepthLocater = function SubgraphDepthLocater () {
-	  this._subgraphs = null;
-	  this._seg = new LineSegment();
-	  this._cga = new CGAlgorithms();
-	  var subgraphs = arguments[0];
-	  this._subgraphs = subgraphs;
-	};
+	  var sourceSwitch = function sourceSwitch(selection) {
+	    selection.append('a').attr('href', '#').html(_t.html('source_switch.live')).attr('class', 'live chip').on('click', click);
+	  };
 
-	var staticAccessors$30 = { DepthSegment: { configurable: true } };
-	SubgraphDepthLocater.prototype.findStabbedSegments = function findStabbedSegments () {
-	    var this$1 = this;
+	  sourceSwitch.keys = function (_) {
+	    if (!arguments.length) return keys;
+	    keys = _;
+	    return sourceSwitch;
+	  };
 
-	  if (arguments.length === 1) {
-	    var stabbingRayLeftPt = arguments[0];
-	    var stabbedSegments = new ArrayList();
-	    for (var i = this._subgraphs.iterator(); i.hasNext();) {
-	      var bsg = i.next();
-	      var env = bsg.getEnvelope();
-	      if (stabbingRayLeftPt.y < env.getMinY() || stabbingRayLeftPt.y > env.getMaxY()) { continue }
-	      this$1.findStabbedSegments(stabbingRayLeftPt, bsg.getDirectedEdges(), stabbedSegments);
-	    }
-	    return stabbedSegments
-	  } else if (arguments.length === 3) {
-	    if (hasInterface(arguments[2], List) && (arguments[0] instanceof Coordinate && arguments[1] instanceof DirectedEdge)) {
-	      var stabbingRayLeftPt$1 = arguments[0];
-	      var dirEdge = arguments[1];
-	      var stabbedSegments$1 = arguments[2];
-	      var pts = dirEdge.getEdge().getCoordinates();
-	      for (var i$1 = 0; i$1 < pts.length - 1; i$1++) {
-	        this$1._seg.p0 = pts[i$1];
-	        this$1._seg.p1 = pts[i$1 + 1];
-	        if (this$1._seg.p0.y > this$1._seg.p1.y) { this$1._seg.reverse(); }
-	        var maxx = Math.max(this$1._seg.p0.x, this$1._seg.p1.x);
-	        if (maxx < stabbingRayLeftPt$1.x) { continue }
-	        if (this$1._seg.isHorizontal()) { continue }
-	        if (stabbingRayLeftPt$1.y < this$1._seg.p0.y || stabbingRayLeftPt$1.y > this$1._seg.p1.y) { continue }
-	        if (CGAlgorithms.computeOrientation(this$1._seg.p0, this$1._seg.p1, stabbingRayLeftPt$1) === CGAlgorithms.RIGHT) { continue }
-	        var depth = dirEdge.getDepth(Position.LEFT);
-	        if (!this$1._seg.p0.equals(pts[i$1])) { depth = dirEdge.getDepth(Position.RIGHT); }
-	        var ds = new DepthSegment(this$1._seg, depth);
-	        stabbedSegments$1.add(ds);
-	      }
-	    } else if (hasInterface(arguments[2], List) && (arguments[0] instanceof Coordinate && hasInterface(arguments[1], List))) {
-	      var stabbingRayLeftPt$2 = arguments[0];
-	      var dirEdges = arguments[1];
-	      var stabbedSegments$2 = arguments[2];
-	      for (var i$2 = dirEdges.iterator(); i$2.hasNext();) {
-	        var de = i$2.next();
-	        if (!de.isForward()) { continue }
-	        this$1.findStabbedSegments(stabbingRayLeftPt$2, de, stabbedSegments$2);
-	      }
+	  return sourceSwitch;
+	}
+
+	function uiSpinner(context) {
+	  var osm = context.connection();
+	  return function (selection) {
+	    var img = selection.append('img').attr('src', context.imagePath('loader-black.gif')).style('opacity', 0);
+
+	    if (osm) {
+	      osm.on('loading.spinner', function () {
+	        img.transition().style('opacity', 1);
+	      }).on('loaded.spinner', function () {
+	        img.transition().style('opacity', 0);
+	      });
 	    }
-	  }
-	};
-	SubgraphDepthLocater.prototype.getDepth = function getDepth (p) {
-	  var stabbedSegments = this.findStabbedSegments(p);
-	  if (stabbedSegments.size() === 0) { return 0 }
-	  var ds = Collections.min(stabbedSegments);
-	  return ds._leftDepth
-	};
-	SubgraphDepthLocater.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SubgraphDepthLocater.prototype.getClass = function getClass () {
-	  return SubgraphDepthLocater
-	};
-	staticAccessors$30.DepthSegment.get = function () { return DepthSegment };
+	  };
+	}
 
-	Object.defineProperties( SubgraphDepthLocater, staticAccessors$30 );
+	function uiSplash(context) {
+	  return function (selection) {
+	    // Exception - if there are restorable changes, skip this splash screen.
+	    // This is because we currently only support one `uiModal` at a time
+	    //  and we need to show them `uiRestore`` instead of this one.
+	    if (context.history().hasRestorableChanges()) return; // If user has not seen this version of the privacy policy, show the splash again.
 
-	var DepthSegment = function DepthSegment () {
-	  this._upwardSeg = null;
-	  this._leftDepth = null;
-	  var seg = arguments[0];
-	  var depth = arguments[1];
-	  this._upwardSeg = new LineSegment(seg);
-	  this._leftDepth = depth;
-	};
-	DepthSegment.prototype.compareTo = function compareTo (obj) {
-	  var other = obj;
-	  if (this._upwardSeg.minX() >= other._upwardSeg.maxX()) { return 1 }
-	  if (this._upwardSeg.maxX() <= other._upwardSeg.minX()) { return -1 }
-	  var orientIndex = this._upwardSeg.orientationIndex(other._upwardSeg);
-	  if (orientIndex !== 0) { return orientIndex }
-	  orientIndex = -1 * other._upwardSeg.orientationIndex(this._upwardSeg);
-	  if (orientIndex !== 0) { return orientIndex }
-	  return this._upwardSeg.compareTo(other._upwardSeg)
-	};
-	DepthSegment.prototype.compareX = function compareX (seg0, seg1) {
-	  var compare0 = seg0.p0.compareTo(seg1.p0);
-	  if (compare0 !== 0) { return compare0 }
-	  return seg0.p1.compareTo(seg1.p1)
-	};
-	DepthSegment.prototype.toString = function toString () {
-	  return this._upwardSeg.toString()
-	};
-	DepthSegment.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	DepthSegment.prototype.getClass = function getClass () {
-	  return DepthSegment
-	};
+	    var updateMessage = '';
+	    var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
+	    var showSplash = !corePreferences('sawSplash');
 
-	var Triangle = function Triangle (p0, p1, p2) {
-	  this.p0 = p0 || null;
-	  this.p1 = p1 || null;
-	  this.p2 = p2 || null;
-	};
-	Triangle.prototype.area = function area () {
-	  return Triangle.area(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.signedArea = function signedArea () {
-	  return Triangle.signedArea(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.interpolateZ = function interpolateZ (p) {
-	  if (p === null) { throw new IllegalArgumentException('Supplied point is null.') }
-	  return Triangle.interpolateZ(p, this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.longestSideLength = function longestSideLength () {
-	  return Triangle.longestSideLength(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.isAcute = function isAcute () {
-	  return Triangle.isAcute(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.circumcentre = function circumcentre () {
-	  return Triangle.circumcentre(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.area3D = function area3D () {
-	  return Triangle.area3D(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.centroid = function centroid () {
-	  return Triangle.centroid(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.inCentre = function inCentre () {
-	  return Triangle.inCentre(this.p0, this.p1, this.p2)
-	};
-	Triangle.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Triangle.prototype.getClass = function getClass () {
-	  return Triangle
-	};
-	Triangle.area = function area (a, b, c) {
-	  return Math.abs(((c.x - a.x) * (b.y - a.y) - (b.x - a.x) * (c.y - a.y)) / 2)
-	};
-	Triangle.signedArea = function signedArea (a, b, c) {
-	  return ((c.x - a.x) * (b.y - a.y) - (b.x - a.x) * (c.y - a.y)) / 2
-	};
-	Triangle.det = function det (m00, m01, m10, m11) {
-	  return m00 * m11 - m01 * m10
-	};
-	Triangle.interpolateZ = function interpolateZ (p, v0, v1, v2) {
-	  var x0 = v0.x;
-	  var y0 = v0.y;
-	  var a = v1.x - x0;
-	  var b = v2.x - x0;
-	  var c = v1.y - y0;
-	  var d = v2.y - y0;
-	  var det = a * d - b * c;
-	  var dx = p.x - x0;
-	  var dy = p.y - y0;
-	  var t = (d * dx - b * dy) / det;
-	  var u = (-c * dx + a * dy) / det;
-	  var z = v0.z + t * (v1.z - v0.z) + u * (v2.z - v0.z);
-	  return z
-	};
-	Triangle.longestSideLength = function longestSideLength (a, b, c) {
-	  var lenAB = a.distance(b);
-	  var lenBC = b.distance(c);
-	  var lenCA = c.distance(a);
-	  var maxLen = lenAB;
-	  if (lenBC > maxLen) { maxLen = lenBC; }
-	  if (lenCA > maxLen) { maxLen = lenCA; }
-	  return maxLen
-	};
-	Triangle.isAcute = function isAcute (a, b, c) {
-	  if (!Angle.isAcute(a, b, c)) { return false }
-	  if (!Angle.isAcute(b, c, a)) { return false }
-	  if (!Angle.isAcute(c, a, b)) { return false }
-	  return true
-	};
-	Triangle.circumcentre = function circumcentre (a, b, c) {
-	  var cx = c.x;
-	  var cy = c.y;
-	  var ax = a.x - cx;
-	  var ay = a.y - cy;
-	  var bx = b.x - cx;
-	  var by = b.y - cy;
-	  var denom = 2 * Triangle.det(ax, ay, bx, by);
-	  var numx = Triangle.det(ay, ax * ax + ay * ay, by, bx * bx + by * by);
-	  var numy = Triangle.det(ax, ax * ax + ay * ay, bx, bx * bx + by * by);
-	  var ccx = cx - numx / denom;
-	  var ccy = cy + numy / denom;
-	  return new Coordinate(ccx, ccy)
-	};
-	Triangle.perpendicularBisector = function perpendicularBisector (a, b) {
-	  var dx = b.x - a.x;
-	  var dy = b.y - a.y;
-	  var l1 = new HCoordinate(a.x + dx / 2.0, a.y + dy / 2.0, 1.0);
-	  var l2 = new HCoordinate(a.x - dy + dx / 2.0, a.y + dx + dy / 2.0, 1.0);
-	  return new HCoordinate(l1, l2)
-	};
-	Triangle.angleBisector = function angleBisector (a, b, c) {
-	  var len0 = b.distance(a);
-	  var len2 = b.distance(c);
-	  var frac = len0 / (len0 + len2);
-	  var dx = c.x - a.x;
-	  var dy = c.y - a.y;
-	  var splitPt = new Coordinate(a.x + frac * dx, a.y + frac * dy);
-	  return splitPt
-	};
-	Triangle.area3D = function area3D (a, b, c) {
-	  var ux = b.x - a.x;
-	  var uy = b.y - a.y;
-	  var uz = b.z - a.z;
-	  var vx = c.x - a.x;
-	  var vy = c.y - a.y;
-	  var vz = c.z - a.z;
-	  var crossx = uy * vz - uz * vy;
-	  var crossy = uz * vx - ux * vz;
-	  var crossz = ux * vy - uy * vx;
-	  var absSq = crossx * crossx + crossy * crossy + crossz * crossz;
-	  var area3D = Math.sqrt(absSq) / 2;
-	  return area3D
-	};
-	Triangle.centroid = function centroid (a, b, c) {
-	  var x = (a.x + b.x + c.x) / 3;
-	  var y = (a.y + b.y + c.y) / 3;
-	  return new Coordinate(x, y)
-	};
-	Triangle.inCentre = function inCentre (a, b, c) {
-	  var len0 = b.distance(c);
-	  var len1 = a.distance(c);
-	  var len2 = a.distance(b);
-	  var circum = len0 + len1 + len2;
-	  var inCentreX = (len0 * a.x + len1 * b.x + len2 * c.x) / circum;
-	  var inCentreY = (len0 * a.y + len1 * b.y + len2 * c.y) / circum;
-	  return new Coordinate(inCentreX, inCentreY)
-	};
+	    if (sawPrivacyVersion !== context.privacyVersion) {
+	      updateMessage = _t('splash.privacy_update');
+	      showSplash = true;
+	    }
 
-	var OffsetCurveSetBuilder = function OffsetCurveSetBuilder () {
-	  this._inputGeom = null;
-	  this._distance = null;
-	  this._curveBuilder = null;
-	  this._curveList = new ArrayList();
-	  var inputGeom = arguments[0];
-	  var distance = arguments[1];
-	  var curveBuilder = arguments[2];
-	  this._inputGeom = inputGeom;
-	  this._distance = distance;
-	  this._curveBuilder = curveBuilder;
-	};
-	OffsetCurveSetBuilder.prototype.addPoint = function addPoint (p) {
-	  if (this._distance <= 0.0) { return null }
-	  var coord = p.getCoordinates();
-	  var curve = this._curveBuilder.getLineCurve(coord, this._distance);
-	  this.addCurve(curve, Location.EXTERIOR, Location.INTERIOR);
-	};
-	OffsetCurveSetBuilder.prototype.addPolygon = function addPolygon (p) {
-	    var this$1 = this;
-
-	  var offsetDistance = this._distance;
-	  var offsetSide = Position.LEFT;
-	  if (this._distance < 0.0) {
-	    offsetDistance = -this._distance;
-	    offsetSide = Position.RIGHT;
-	  }
-	  var shell = p.getExteriorRing();
-	  var shellCoord = CoordinateArrays.removeRepeatedPoints(shell.getCoordinates());
-	  if (this._distance < 0.0 && this.isErodedCompletely(shell, this._distance)) { return null }
-	  if (this._distance <= 0.0 && shellCoord.length < 3) { return null }
-	  this.addPolygonRing(shellCoord, offsetDistance, offsetSide, Location.EXTERIOR, Location.INTERIOR);
-	  for (var i = 0; i < p.getNumInteriorRing(); i++) {
-	    var hole = p.getInteriorRingN(i);
-	    var holeCoord = CoordinateArrays.removeRepeatedPoints(hole.getCoordinates());
-	    if (this$1._distance > 0.0 && this$1.isErodedCompletely(hole, -this$1._distance)) { continue }
-	    this$1.addPolygonRing(holeCoord, offsetDistance, Position.opposite(offsetSide), Location.INTERIOR, Location.EXTERIOR);
-	  }
-	};
-	OffsetCurveSetBuilder.prototype.isTriangleErodedCompletely = function isTriangleErodedCompletely (triangleCoord, bufferDistance) {
-	  var tri = new Triangle(triangleCoord[0], triangleCoord[1], triangleCoord[2]);
-	  var inCentre = tri.inCentre();
-	  var distToCentre = CGAlgorithms.distancePointLine(inCentre, tri.p0, tri.p1);
-	  return distToCentre < Math.abs(bufferDistance)
-	};
-	OffsetCurveSetBuilder.prototype.addLineString = function addLineString (line) {
-	  if (this._distance <= 0.0 && !this._curveBuilder.getBufferParameters().isSingleSided()) { return null }
-	  var coord = CoordinateArrays.removeRepeatedPoints(line.getCoordinates());
-	  var curve = this._curveBuilder.getLineCurve(coord, this._distance);
-	  this.addCurve(curve, Location.EXTERIOR, Location.INTERIOR);
-	};
-	OffsetCurveSetBuilder.prototype.addCurve = function addCurve (coord, leftLoc, rightLoc) {
-	  if (coord === null || coord.length < 2) { return null }
-	  var e = new NodedSegmentString(coord, new Label(0, Location.BOUNDARY, leftLoc, rightLoc));
-	  this._curveList.add(e);
-	};
-	OffsetCurveSetBuilder.prototype.getCurves = function getCurves () {
-	  this.add(this._inputGeom);
-	  return this._curveList
-	};
-	OffsetCurveSetBuilder.prototype.addPolygonRing = function addPolygonRing (coord, offsetDistance, side, cwLeftLoc, cwRightLoc) {
-	  if (offsetDistance === 0.0 && coord.length < LinearRing.MINIMUM_VALID_SIZE) { return null }
-	  var leftLoc = cwLeftLoc;
-	  var rightLoc = cwRightLoc;
-	  if (coord.length >= LinearRing.MINIMUM_VALID_SIZE && CGAlgorithms.isCCW(coord)) {
-	    leftLoc = cwRightLoc;
-	    rightLoc = cwLeftLoc;
-	    side = Position.opposite(side);
-	  }
-	  var curve = this._curveBuilder.getRingCurve(coord, side, offsetDistance);
-	  this.addCurve(curve, leftLoc, rightLoc);
-	};
-	OffsetCurveSetBuilder.prototype.add = function add (g) {
-	  if (g.isEmpty()) { return null }
-	  if (g instanceof Polygon) { this.addPolygon(g); }
-	  else if (g instanceof LineString) { this.addLineString(g); }
-	  else if (g instanceof Point$1) { this.addPoint(g); }
-	  else if (g instanceof MultiPoint) { this.addCollection(g); }
-	  else if (g instanceof MultiLineString) { this.addCollection(g); }
-	  else if (g instanceof MultiPolygon) { this.addCollection(g); }
-	  else if (g instanceof GeometryCollection) { this.addCollection(g); }
-	  // else throw new UnsupportedOperationException(g.getClass().getName())
-	};
-	OffsetCurveSetBuilder.prototype.isErodedCompletely = function isErodedCompletely (ring, bufferDistance) {
-	  var ringCoord = ring.getCoordinates();
-	  // const minDiam = 0.0
-	  if (ringCoord.length < 4) { return bufferDistance < 0 }
-	  if (ringCoord.length === 4) { return this.isTriangleErodedCompletely(ringCoord, bufferDistance) }
-	  var env = ring.getEnvelopeInternal();
-	  var envMinDimension = Math.min(env.getHeight(), env.getWidth());
-	  if (bufferDistance < 0.0 && 2 * Math.abs(bufferDistance) > envMinDimension) { return true }
-	  return false
-	};
-	OffsetCurveSetBuilder.prototype.addCollection = function addCollection (gc) {
-	    var this$1 = this;
+	    if (!showSplash) return;
+	    corePreferences('sawSplash', true);
+	    corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen
 
-	  for (var i = 0; i < gc.getNumGeometries(); i++) {
-	    var g = gc.getGeometryN(i);
-	    this$1.add(g);
-	  }
-	};
-	OffsetCurveSetBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetCurveSetBuilder.prototype.getClass = function getClass () {
-	  return OffsetCurveSetBuilder
-	};
+	    _mainFileFetcher.get('intro_graph');
+	    var modalSelection = uiModal(selection);
+	    modalSelection.select('.modal').attr('class', 'modal-splash modal');
+	    var introModal = modalSelection.select('.content').append('div').attr('class', 'fillL');
+	    introModal.append('div').attr('class', 'modal-section').append('h3').html(_t.html('splash.welcome'));
+	    var modalSection = introModal.append('div').attr('class', 'modal-section');
+	    modalSection.append('p').html(_t.html('splash.text', {
+	      version: context.version,
+	      website: '<a target="_blank" href="http://ideditor.blog/">ideditor.blog</a>',
+	      github: '<a target="_blank" href="https://github.com/openstreetmap/iD">github.com</a>'
+	    }));
+	    modalSection.append('p').html(_t.html('splash.privacy', {
+	      updateMessage: updateMessage,
+	      privacyLink: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' + _t('splash.privacy_policy') + '</a>'
+	    }));
+	    var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
+	    var walkthrough = buttonWrap.append('button').attr('class', 'walkthrough').on('click', function () {
+	      context.container().call(uiIntro(context));
+	      modalSelection.close();
+	    });
+	    walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+	    walkthrough.append('div').html(_t.html('splash.walkthrough'));
+	    var startEditing = buttonWrap.append('button').attr('class', 'start-editing').on('click', modalSelection.close);
+	    startEditing.append('svg').attr('class', 'logo logo-features').append('use').attr('xlink:href', '#iD-logo-features');
+	    startEditing.append('div').html(_t.html('splash.start'));
+	    modalSelection.select('button.close').attr('class', 'hide');
+	  };
+	}
 
-	var PointOnGeometryLocator = function PointOnGeometryLocator () {};
+	function uiStatus(context) {
+	  var osm = context.connection();
+	  return function (selection) {
+	    if (!osm) return;
 
-	PointOnGeometryLocator.prototype.locate = function locate (p) {};
-	PointOnGeometryLocator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointOnGeometryLocator.prototype.getClass = function getClass () {
-	  return PointOnGeometryLocator
-	};
+	    function update(err, apiStatus) {
+	      selection.html('');
 
-	var GeometryCollectionIterator = function GeometryCollectionIterator () {
-	  this._parent = null;
-	  this._atStart = null;
-	  this._max = null;
-	  this._index = null;
-	  this._subcollectionIterator = null;
-	  var parent = arguments[0];
-	  this._parent = parent;
-	  this._atStart = true;
-	  this._index = 0;
-	  this._max = parent.getNumGeometries();
-	};
-	GeometryCollectionIterator.prototype.next = function next () {
-	  if (this._atStart) {
-	    this._atStart = false;
-	    if (GeometryCollectionIterator.isAtomic(this._parent)) { this._index++; }
-	    return this._parent
-	  }
-	  if (this._subcollectionIterator !== null) {
-	    if (this._subcollectionIterator.hasNext()) {
-	      return this._subcollectionIterator.next()
-	    } else {
-	      this._subcollectionIterator = null;
-	    }
-	  }
-	  if (this._index >= this._max) {
-	    throw new NoSuchElementException()
-	  }
-	  var obj = this._parent.getGeometryN(this._index++);
-	  if (obj instanceof GeometryCollection) {
-	    this._subcollectionIterator = new GeometryCollectionIterator(obj);
-	    return this._subcollectionIterator.next()
-	  }
-	  return obj
-	};
-	GeometryCollectionIterator.prototype.remove = function remove () {
-	  throw new Error(this.getClass().getName())
-	};
-	GeometryCollectionIterator.prototype.hasNext = function hasNext () {
-	  if (this._atStart) {
-	    return true
-	  }
-	  if (this._subcollectionIterator !== null) {
-	    if (this._subcollectionIterator.hasNext()) {
-	      return true
-	    }
-	    this._subcollectionIterator = null;
-	  }
-	  if (this._index >= this._max) {
-	    return false
-	  }
-	  return true
-	};
-	GeometryCollectionIterator.prototype.interfaces_ = function interfaces_ () {
-	  return [Iterator$1]
-	};
-	GeometryCollectionIterator.prototype.getClass = function getClass () {
-	  return GeometryCollectionIterator
-	};
-	GeometryCollectionIterator.isAtomic = function isAtomic (geom) {
-	  return !(geom instanceof GeometryCollection)
-	};
+	      if (err) {
+	        if (apiStatus === 'connectionSwitched') {
+	          // if the connection was just switched, we can't rely on
+	          // the status (we're getting the status of the previous api)
+	          return;
+	        } else if (apiStatus === 'rateLimited') {
+	          selection.html(_t.html('osm_api_status.message.rateLimit')).append('a').attr('href', '#').attr('class', 'api-status-login').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('login')).on('click.login', function (d3_event) {
+	            d3_event.preventDefault();
+	            osm.authenticate();
+	          });
+	        } else {
+	          // don't allow retrying too rapidly
+	          var throttledRetry = throttle(function () {
+	            // try loading the visible tiles
+	            context.loadTiles(context.projection); // manually reload the status too in case all visible tiles were already loaded
 
-	var SimplePointInAreaLocator = function SimplePointInAreaLocator () {
-	  this._geom = null;
-	  var geom = arguments[0];
-	  this._geom = geom;
-	};
-	SimplePointInAreaLocator.prototype.locate = function locate (p) {
-	  return SimplePointInAreaLocator.locate(p, this._geom)
-	};
-	SimplePointInAreaLocator.prototype.interfaces_ = function interfaces_ () {
-	  return [PointOnGeometryLocator]
-	};
-	SimplePointInAreaLocator.prototype.getClass = function getClass () {
-	  return SimplePointInAreaLocator
-	};
-	SimplePointInAreaLocator.isPointInRing = function isPointInRing (p, ring) {
-	  if (!ring.getEnvelopeInternal().intersects(p)) { return false }
-	  return CGAlgorithms.isPointInRing(p, ring.getCoordinates())
-	};
-	SimplePointInAreaLocator.containsPointInPolygon = function containsPointInPolygon (p, poly) {
-	  if (poly.isEmpty()) { return false }
-	  var shell = poly.getExteriorRing();
-	  if (!SimplePointInAreaLocator.isPointInRing(p, shell)) { return false }
-	  for (var i = 0; i < poly.getNumInteriorRing(); i++) {
-	    var hole = poly.getInteriorRingN(i);
-	    if (SimplePointInAreaLocator.isPointInRing(p, hole)) { return false }
-	  }
-	  return true
-	};
-	SimplePointInAreaLocator.containsPoint = function containsPoint (p, geom) {
-	  if (geom instanceof Polygon) {
-	    return SimplePointInAreaLocator.containsPointInPolygon(p, geom)
-	  } else if (geom instanceof GeometryCollection) {
-	    var geomi = new GeometryCollectionIterator(geom);
-	    while (geomi.hasNext()) {
-	      var g2 = geomi.next();
-	      if (g2 !== geom) { if (SimplePointInAreaLocator.containsPoint(p, g2)) { return true } }
-	    }
-	  }
-	  return false
-	};
-	SimplePointInAreaLocator.locate = function locate (p, geom) {
-	  if (geom.isEmpty()) { return Location.EXTERIOR }
-	  if (SimplePointInAreaLocator.containsPoint(p, geom)) { return Location.INTERIOR }
-	  return Location.EXTERIOR
-	};
+	            osm.reloadApiStatus();
+	          }, 2000); // eslint-disable-next-line no-warning-comments
+	          // TODO: nice messages for different error types
 
-	var EdgeEndStar = function EdgeEndStar () {
-	  this._edgeMap = new TreeMap();
-	  this._edgeList = null;
-	  this._ptInAreaLocation = [Location.NONE, Location.NONE];
-	};
-	EdgeEndStar.prototype.getNextCW = function getNextCW (ee) {
-	  this.getEdges();
-	  var i = this._edgeList.indexOf(ee);
-	  var iNextCW = i - 1;
-	  if (i === 0) { iNextCW = this._edgeList.size() - 1; }
-	  return this._edgeList.get(iNextCW)
-	};
-	EdgeEndStar.prototype.propagateSideLabels = function propagateSideLabels (geomIndex) {
-	  var startLoc = Location.NONE;
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    var label = e.getLabel();
-	    if (label.isArea(geomIndex) && label.getLocation(geomIndex, Position.LEFT) !== Location.NONE) { startLoc = label.getLocation(geomIndex, Position.LEFT); }
-	  }
-	  if (startLoc === Location.NONE) { return null }
-	  var currLoc = startLoc;
-	  for (var it$1 = this.iterator(); it$1.hasNext();) {
-	    var e$1 = it$1.next();
-	    var label$1 = e$1.getLabel();
-	    if (label$1.getLocation(geomIndex, Position.ON) === Location.NONE) { label$1.setLocation(geomIndex, Position.ON, currLoc); }
-	    if (label$1.isArea(geomIndex)) {
-	      var leftLoc = label$1.getLocation(geomIndex, Position.LEFT);
-	      var rightLoc = label$1.getLocation(geomIndex, Position.RIGHT);
-	      if (rightLoc !== Location.NONE) {
-	        if (rightLoc !== currLoc) { throw new TopologyException('side location conflict', e$1.getCoordinate()) }
-	        if (leftLoc === Location.NONE) {
-	          Assert.shouldNeverReachHere('found single null side (at ' + e$1.getCoordinate() + ')');
-	        }
-	        currLoc = leftLoc;
-	      } else {
-	        Assert.isTrue(label$1.getLocation(geomIndex, Position.LEFT) === Location.NONE, 'found single null side');
-	        label$1.setLocation(geomIndex, Position.RIGHT, currLoc);
-	        label$1.setLocation(geomIndex, Position.LEFT, currLoc);
-	      }
-	    }
-	  }
-	};
-	EdgeEndStar.prototype.getCoordinate = function getCoordinate () {
-	  var it = this.iterator();
-	  if (!it.hasNext()) { return null }
-	  var e = it.next();
-	  return e.getCoordinate()
-	};
-	EdgeEndStar.prototype.print = function print (out) {
-	  System.out.println('EdgeEndStar:   ' + this.getCoordinate());
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    e.print(out);
-	  }
-	};
-	EdgeEndStar.prototype.isAreaLabelsConsistent = function isAreaLabelsConsistent (geomGraph) {
-	  this.computeEdgeEndLabels(geomGraph.getBoundaryNodeRule());
-	  return this.checkAreaLabelsConsistent(0)
-	};
-	EdgeEndStar.prototype.checkAreaLabelsConsistent = function checkAreaLabelsConsistent (geomIndex) {
-	  var edges = this.getEdges();
-	  if (edges.size() <= 0) { return true }
-	  var lastEdgeIndex = edges.size() - 1;
-	  var startLabel = edges.get(lastEdgeIndex).getLabel();
-	  var startLoc = startLabel.getLocation(geomIndex, Position.LEFT);
-	  Assert.isTrue(startLoc !== Location.NONE, 'Found unlabelled area edge');
-	  var currLoc = startLoc;
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    var label = e.getLabel();
-	    Assert.isTrue(label.isArea(geomIndex), 'Found non-area edge');
-	    var leftLoc = label.getLocation(geomIndex, Position.LEFT);
-	    var rightLoc = label.getLocation(geomIndex, Position.RIGHT);
-	    if (leftLoc === rightLoc) {
-	      return false
-	    }
-	    if (rightLoc !== currLoc) {
-	      return false
-	    }
-	    currLoc = leftLoc;
-	  }
-	  return true
-	};
-	EdgeEndStar.prototype.findIndex = function findIndex (eSearch) {
-	    var this$1 = this;
 
-	  this.iterator();
-	  for (var i = 0; i < this._edgeList.size(); i++) {
-	    var e = this$1._edgeList.get(i);
-	    if (e === eSearch) { return i }
-	  }
-	  return -1
-	};
-	EdgeEndStar.prototype.iterator = function iterator () {
-	  return this.getEdges().iterator()
-	};
-	EdgeEndStar.prototype.getEdges = function getEdges () {
-	  if (this._edgeList === null) {
-	    this._edgeList = new ArrayList(this._edgeMap.values());
-	  }
-	  return this._edgeList
-	};
-	EdgeEndStar.prototype.getLocation = function getLocation (geomIndex, p, geom) {
-	  if (this._ptInAreaLocation[geomIndex] === Location.NONE) {
-	    this._ptInAreaLocation[geomIndex] = SimplePointInAreaLocator.locate(p, geom[geomIndex].getGeometry());
-	  }
-	  return this._ptInAreaLocation[geomIndex]
-	};
-	EdgeEndStar.prototype.toString = function toString () {
-	  var buf = new StringBuffer();
-	  buf.append('EdgeEndStar:   ' + this.getCoordinate());
-	  buf.append('\n');
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    buf.append(e);
-	    buf.append('\n');
-	  }
-	  return buf.toString()
-	};
-	EdgeEndStar.prototype.computeEdgeEndLabels = function computeEdgeEndLabels (boundaryNodeRule) {
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var ee = it.next();
-	    ee.computeLabel(boundaryNodeRule);
-	  }
-	};
-	EdgeEndStar.prototype.computeLabelling = function computeLabelling (geomGraph) {
-	    var this$1 = this;
-
-	  this.computeEdgeEndLabels(geomGraph[0].getBoundaryNodeRule());
-	  this.propagateSideLabels(0);
-	  this.propagateSideLabels(1);
-	  var hasDimensionalCollapseEdge = [false, false];
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    var label = e.getLabel();
-	    for (var geomi = 0; geomi < 2; geomi++) {
-	      if (label.isLine(geomi) && label.getLocation(geomi) === Location.BOUNDARY) { hasDimensionalCollapseEdge[geomi] = true; }
-	    }
-	  }
-	  for (var it$1 = this.iterator(); it$1.hasNext();) {
-	    var e$1 = it$1.next();
-	    var label$1 = e$1.getLabel();
-	    for (var geomi$1 = 0; geomi$1 < 2; geomi$1++) {
-	      if (label$1.isAnyNull(geomi$1)) {
-	        var loc = Location.NONE;
-	        if (hasDimensionalCollapseEdge[geomi$1]) {
-	          loc = Location.EXTERIOR;
-	        } else {
-	          var p = e$1.getCoordinate();
-	          loc = this$1.getLocation(geomi$1, p, geomGraph);
+	          selection.html(_t.html('osm_api_status.message.error') + ' ').append('a').attr('href', '#') // let the user manually retry their connection directly
+	          .html(_t.html('osm_api_status.retry')).on('click.retry', function (d3_event) {
+	            d3_event.preventDefault();
+	            throttledRetry();
+	          });
 	        }
-	        label$1.setAllLocationsIfNull(geomi$1, loc);
+	      } else if (apiStatus === 'readonly') {
+	        selection.html(_t.html('osm_api_status.message.readonly'));
+	      } else if (apiStatus === 'offline') {
+	        selection.html(_t.html('osm_api_status.message.offline'));
 	      }
-	    }
-	  }
-	};
-	EdgeEndStar.prototype.getDegree = function getDegree () {
-	  return this._edgeMap.size()
-	};
-	EdgeEndStar.prototype.insertEdgeEnd = function insertEdgeEnd (e, obj) {
-	  this._edgeMap.put(e, obj);
-	  this._edgeList = null;
-	};
-	EdgeEndStar.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeEndStar.prototype.getClass = function getClass () {
-	  return EdgeEndStar
-	};
 
-	var DirectedEdgeStar = (function (EdgeEndStar$$1) {
-	  function DirectedEdgeStar () {
-	    EdgeEndStar$$1.call(this);
-	    this._resultAreaEdgeList = null;
-	    this._label = null;
-	    this._SCANNING_FOR_INCOMING = 1;
-	    this._LINKING_TO_OUTGOING = 2;
-	  }
-
-	  if ( EdgeEndStar$$1 ) { DirectedEdgeStar.__proto__ = EdgeEndStar$$1; }
-	  DirectedEdgeStar.prototype = Object.create( EdgeEndStar$$1 && EdgeEndStar$$1.prototype );
-	  DirectedEdgeStar.prototype.constructor = DirectedEdgeStar;
-	  DirectedEdgeStar.prototype.linkResultDirectedEdges = function linkResultDirectedEdges () {
-	    var this$1 = this;
-
-	    this.getResultAreaEdges();
-	    var firstOut = null;
-	    var incoming = null;
-	    var state = this._SCANNING_FOR_INCOMING;
-	    for (var i = 0; i < this._resultAreaEdgeList.size(); i++) {
-	      var nextOut = this$1._resultAreaEdgeList.get(i);
-	      var nextIn = nextOut.getSym();
-	      if (!nextOut.getLabel().isArea()) { continue }
-	      if (firstOut === null && nextOut.isInResult()) { firstOut = nextOut; }
-	      switch (state) {
-	        case this$1._SCANNING_FOR_INCOMING:
-	          if (!nextIn.isInResult()) { continue }
-	          incoming = nextIn;
-	          state = this$1._LINKING_TO_OUTGOING;
-	          break
-	        case this$1._LINKING_TO_OUTGOING:
-	          if (!nextOut.isInResult()) { continue }
-	          incoming.setNext(nextOut);
-	          state = this$1._SCANNING_FOR_INCOMING;
-	          break
-	      }
-	    }
-	    if (state === this._LINKING_TO_OUTGOING) {
-	      if (firstOut === null) { throw new TopologyException('no outgoing dirEdge found', this.getCoordinate()) }
-	      Assert.isTrue(firstOut.isInResult(), 'unable to link last incoming dirEdge');
-	      incoming.setNext(firstOut);
-	    }
-	  };
-	  DirectedEdgeStar.prototype.insert = function insert (ee) {
-	    var de = ee;
-	    this.insertEdgeEnd(de, de);
-	  };
-	  DirectedEdgeStar.prototype.getRightmostEdge = function getRightmostEdge () {
-	    var edges = this.getEdges();
-	    var size = edges.size();
-	    if (size < 1) { return null }
-	    var de0 = edges.get(0);
-	    if (size === 1) { return de0 }
-	    var deLast = edges.get(size - 1);
-	    var quad0 = de0.getQuadrant();
-	    var quad1 = deLast.getQuadrant();
-	    if (Quadrant.isNorthern(quad0) && Quadrant.isNorthern(quad1)) { return de0; } else if (!Quadrant.isNorthern(quad0) && !Quadrant.isNorthern(quad1)) { return deLast; } else {
-	      // const nonHorizontalEdge = null
-	      if (de0.getDy() !== 0) { return de0; } else if (deLast.getDy() !== 0) { return deLast }
-	    }
-	    Assert.shouldNeverReachHere('found two horizontal edges incident on node');
-	    return null
-	  };
-	  DirectedEdgeStar.prototype.print = function print (out) {
-	    System.out.println('DirectedEdgeStar: ' + this.getCoordinate());
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var de = it.next();
-	      out.print('out ');
-	      de.print(out);
-	      out.println();
-	      out.print('in ');
-	      de.getSym().print(out);
-	      out.println();
-	    }
-	  };
-	  DirectedEdgeStar.prototype.getResultAreaEdges = function getResultAreaEdges () {
-	    var this$1 = this;
-
-	    if (this._resultAreaEdgeList !== null) { return this._resultAreaEdgeList }
-	    this._resultAreaEdgeList = new ArrayList();
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var de = it.next();
-	      if (de.isInResult() || de.getSym().isInResult()) { this$1._resultAreaEdgeList.add(de); }
-	    }
-	    return this._resultAreaEdgeList
-	  };
-	  DirectedEdgeStar.prototype.updateLabelling = function updateLabelling (nodeLabel) {
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var de = it.next();
-	      var label = de.getLabel();
-	      label.setAllLocationsIfNull(0, nodeLabel.getLocation(0));
-	      label.setAllLocationsIfNull(1, nodeLabel.getLocation(1));
-	    }
-	  };
-	  DirectedEdgeStar.prototype.linkAllDirectedEdges = function linkAllDirectedEdges () {
-	    var this$1 = this;
-
-	    this.getEdges();
-	    var prevOut = null;
-	    var firstIn = null;
-	    for (var i = this._edgeList.size() - 1; i >= 0; i--) {
-	      var nextOut = this$1._edgeList.get(i);
-	      var nextIn = nextOut.getSym();
-	      if (firstIn === null) { firstIn = nextIn; }
-	      if (prevOut !== null) { nextIn.setNext(prevOut); }
-	      prevOut = nextOut;
-	    }
-	    firstIn.setNext(prevOut);
-	  };
-	  DirectedEdgeStar.prototype.computeDepths = function computeDepths () {
-	    var this$1 = this;
-
-	    if (arguments.length === 1) {
-	      var de = arguments[0];
-	      var edgeIndex = this.findIndex(de);
-	      // const label = de.getLabel()
-	      var startDepth = de.getDepth(Position.LEFT);
-	      var targetLastDepth = de.getDepth(Position.RIGHT);
-	      var nextDepth = this.computeDepths(edgeIndex + 1, this._edgeList.size(), startDepth);
-	      var lastDepth = this.computeDepths(0, edgeIndex, nextDepth);
-	      if (lastDepth !== targetLastDepth) { throw new TopologyException('depth mismatch at ' + de.getCoordinate()) }
-	    } else if (arguments.length === 3) {
-	      var startIndex = arguments[0];
-	      var endIndex = arguments[1];
-	      var startDepth$1 = arguments[2];
-	      var currDepth = startDepth$1;
-	      for (var i = startIndex; i < endIndex; i++) {
-	        var nextDe = this$1._edgeList.get(i);
-	        // const label = nextDe.getLabel()
-	        nextDe.setEdgeDepths(Position.RIGHT, currDepth);
-	        currDepth = nextDe.getDepth(Position.LEFT);
-	      }
-	      return currDepth
-	    }
-	  };
-	  DirectedEdgeStar.prototype.mergeSymLabels = function mergeSymLabels () {
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var de = it.next();
-	      var label = de.getLabel();
-	      label.merge(de.getSym().getLabel());
-	    }
-	  };
-	  DirectedEdgeStar.prototype.linkMinimalDirectedEdges = function linkMinimalDirectedEdges (er) {
-	    var this$1 = this;
-
-	    var firstOut = null;
-	    var incoming = null;
-	    var state = this._SCANNING_FOR_INCOMING;
-	    for (var i = this._resultAreaEdgeList.size() - 1; i >= 0; i--) {
-	      var nextOut = this$1._resultAreaEdgeList.get(i);
-	      var nextIn = nextOut.getSym();
-	      if (firstOut === null && nextOut.getEdgeRing() === er) { firstOut = nextOut; }
-	      switch (state) {
-	        case this$1._SCANNING_FOR_INCOMING:
-	          if (nextIn.getEdgeRing() !== er) { continue }
-	          incoming = nextIn;
-	          state = this$1._LINKING_TO_OUTGOING;
-	          break
-	        case this$1._LINKING_TO_OUTGOING:
-	          if (nextOut.getEdgeRing() !== er) { continue }
-	          incoming.setNextMin(nextOut);
-	          state = this$1._SCANNING_FOR_INCOMING;
-	          break
-	      }
-	    }
-	    if (state === this._LINKING_TO_OUTGOING) {
-	      Assert.isTrue(firstOut !== null, 'found null for first outgoing dirEdge');
-	      Assert.isTrue(firstOut.getEdgeRing() === er, 'unable to link last incoming dirEdge');
-	      incoming.setNextMin(firstOut);
-	    }
-	  };
-	  DirectedEdgeStar.prototype.getOutgoingDegree = function getOutgoingDegree () {
-	    if (arguments.length === 0) {
-	      var degree = 0;
-	      for (var it = this.iterator(); it.hasNext();) {
-	        var de = it.next();
-	        if (de.isInResult()) { degree++; }
-	      }
-	      return degree
-	    } else if (arguments.length === 1) {
-	      var er = arguments[0];
-	      var degree$1 = 0;
-	      for (var it$1 = this.iterator(); it$1.hasNext();) {
-	        var de$1 = it$1.next();
-	        if (de$1.getEdgeRing() === er) { degree$1++; }
-	      }
-	      return degree$1
-	    }
-	  };
-	  DirectedEdgeStar.prototype.getLabel = function getLabel () {
-	    return this._label
-	  };
-	  DirectedEdgeStar.prototype.findCoveredLineEdges = function findCoveredLineEdges () {
-	    var startLoc = Location.NONE;
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var nextOut = it.next();
-	      var nextIn = nextOut.getSym();
-	      if (!nextOut.isLineEdge()) {
-	        if (nextOut.isInResult()) {
-	          startLoc = Location.INTERIOR;
-	          break
-	        }
-	        if (nextIn.isInResult()) {
-	          startLoc = Location.EXTERIOR;
-	          break
-	        }
-	      }
-	    }
-	    if (startLoc === Location.NONE) { return null }
-	    var currLoc = startLoc;
-	    for (var it$1 = this.iterator(); it$1.hasNext();) {
-	      var nextOut$1 = it$1.next();
-	      var nextIn$1 = nextOut$1.getSym();
-	      if (nextOut$1.isLineEdge()) {
-	        nextOut$1.getEdge().setCovered(currLoc === Location.INTERIOR);
-	      } else {
-	        if (nextOut$1.isInResult()) { currLoc = Location.EXTERIOR; }
-	        if (nextIn$1.isInResult()) { currLoc = Location.INTERIOR; }
-	      }
+	      selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
 	    }
+
+	    osm.on('apiStatusChange.uiStatus', update); // reload the status periodically regardless of other factors
+
+	    window.setInterval(function () {
+	      osm.reloadApiStatus();
+	    }, 90000); // load the initial status in case no OSM data was loaded yet
+
+	    osm.reloadApiStatus();
 	  };
-	  DirectedEdgeStar.prototype.computeLabelling = function computeLabelling (geom) {
-	    var this$1 = this;
+	}
 
-	    EdgeEndStar$$1.prototype.computeLabelling.call(this, geom);
-	    this._label = new Label(Location.NONE);
-	    for (var it = this.iterator(); it.hasNext();) {
-	      var ee = it.next();
-	      var e = ee.getEdge();
-	      var eLabel = e.getLabel();
-	      for (var i = 0; i < 2; i++) {
-	        var eLoc = eLabel.getLocation(i);
-	        if (eLoc === Location.INTERIOR || eLoc === Location.BOUNDARY) { this$1._label.setLocation(i, Location.INTERIOR); }
-	      }
-	    }
+	function modeDrawArea(context, wayID, startGraph, button) {
+	  var mode = {
+	    button: button,
+	    id: 'draw-area'
 	  };
-	  DirectedEdgeStar.prototype.interfaces_ = function interfaces_ () {
-	    return []
+	  var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawArea', function () {
+	    context.ui().flash.iconName('#iD-icon-no').label(_t('self_intersection.error.areas'))();
+	  });
+	  mode.wayID = wayID;
+
+	  mode.enter = function () {
+	    context.install(behavior);
 	  };
-	  DirectedEdgeStar.prototype.getClass = function getClass () {
-	    return DirectedEdgeStar
+
+	  mode.exit = function () {
+	    context.uninstall(behavior);
 	  };
 
-	  return DirectedEdgeStar;
-	}(EdgeEndStar));
+	  mode.selectedIDs = function () {
+	    return [wayID];
+	  };
 
-	var OverlayNodeFactory = (function (NodeFactory$$1) {
-	  function OverlayNodeFactory () {
-	    NodeFactory$$1.apply(this, arguments);
-	  }
+	  mode.activeID = function () {
+	    return behavior && behavior.activeID() || [];
+	  };
 
-	  if ( NodeFactory$$1 ) { OverlayNodeFactory.__proto__ = NodeFactory$$1; }
-	  OverlayNodeFactory.prototype = Object.create( NodeFactory$$1 && NodeFactory$$1.prototype );
-	  OverlayNodeFactory.prototype.constructor = OverlayNodeFactory;
+	  return mode;
+	}
 
-	  OverlayNodeFactory.prototype.createNode = function createNode (coord) {
-	    return new Node$1(coord, new DirectedEdgeStar())
-	  };
-	  OverlayNodeFactory.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  OverlayNodeFactory.prototype.getClass = function getClass () {
-	    return OverlayNodeFactory
+	function modeAddArea(context, mode) {
+	  mode.id = 'add-area';
+	  var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
+	  var defaultTags = {
+	    area: 'yes'
 	  };
+	  if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'area');
 
-	  return OverlayNodeFactory;
-	}(NodeFactory));
-
-	var OrientedCoordinateArray = function OrientedCoordinateArray () {
-	  this._pts = null;
-	  this._orientation = null;
-	  var pts = arguments[0];
-	  this._pts = pts;
-	  this._orientation = OrientedCoordinateArray.orientation(pts);
-	};
-	OrientedCoordinateArray.prototype.compareTo = function compareTo (o1) {
-	  var oca = o1;
-	  var comp = OrientedCoordinateArray.compareOriented(this._pts, this._orientation, oca._pts, oca._orientation);
-	  return comp
-	};
-	OrientedCoordinateArray.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	OrientedCoordinateArray.prototype.getClass = function getClass () {
-	  return OrientedCoordinateArray
-	};
-	OrientedCoordinateArray.orientation = function orientation (pts) {
-	  return CoordinateArrays.increasingDirection(pts) === 1
-	};
-	OrientedCoordinateArray.compareOriented = function compareOriented (pts1, orientation1, pts2, orientation2) {
-	  var dir1 = orientation1 ? 1 : -1;
-	  var dir2 = orientation2 ? 1 : -1;
-	  var limit1 = orientation1 ? pts1.length : -1;
-	  var limit2 = orientation2 ? pts2.length : -1;
-	  var i1 = orientation1 ? 0 : pts1.length - 1;
-	  var i2 = orientation2 ? 0 : pts2.length - 1;
-	  // const comp = 0
-	  while (true) {
-	    var compPt = pts1[i1].compareTo(pts2[i2]);
-	    if (compPt !== 0) { return compPt }
-	    i1 += dir1;
-	    i2 += dir2;
-	    var done1 = i1 === limit1;
-	    var done2 = i2 === limit2;
-	    if (done1 && !done2) { return -1 }
-	    if (!done1 && done2) { return 1 }
-	    if (done1 && done2) { return 0 }
+	  function actionClose(wayId) {
+	    return function (graph) {
+	      return graph.replace(graph.entity(wayId).close());
+	    };
 	  }
-	};
-
-	var EdgeList = function EdgeList () {
-	  this._edges = new ArrayList();
-	  this._ocaMap = new TreeMap();
-	};
-	EdgeList.prototype.print = function print (out) {
-	    var this$1 = this;
-
-	  out.print('MULTILINESTRING ( ');
-	  for (var j = 0; j < this._edges.size(); j++) {
-	    var e = this$1._edges.get(j);
-	    if (j > 0) { out.print(','); }
-	    out.print('(');
-	    var pts = e.getCoordinates();
-	    for (var i = 0; i < pts.length; i++) {
-	      if (i > 0) { out.print(','); }
-	      out.print(pts[i].x + ' ' + pts[i].y);
-	    }
-	    out.println(')');
-	  }
-	  out.print(')  ');
-	};
-	EdgeList.prototype.addAll = function addAll (edgeColl) {
-	    var this$1 = this;
 
-	  for (var i = edgeColl.iterator(); i.hasNext();) {
-	    this$1.add(i.next());
+	  function start(loc) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
+	    });
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
+	    context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
 	  }
-	};
-	EdgeList.prototype.findEdgeIndex = function findEdgeIndex (e) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < this._edges.size(); i++) {
-	    if (this$1._edges.get(i).equals(e)) { return i }
+	  function startFromWay(loc, edge) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
+	    });
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id), actionAddMidpoint({
+	      loc: loc,
+	      edge: edge
+	    }, node));
+	    context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
 	  }
-	  return -1
-	};
-	EdgeList.prototype.iterator = function iterator () {
-	  return this._edges.iterator()
-	};
-	EdgeList.prototype.getEdges = function getEdges () {
-	  return this._edges
-	};
-	EdgeList.prototype.get = function get (i) {
-	  return this._edges.get(i)
-	};
-	EdgeList.prototype.findEqualEdge = function findEqualEdge (e) {
-	  var oca = new OrientedCoordinateArray(e.getCoordinates());
-	  var matchEdge = this._ocaMap.get(oca);
-	  return matchEdge
-	};
-	EdgeList.prototype.add = function add (e) {
-	  this._edges.add(e);
-	  var oca = new OrientedCoordinateArray(e.getCoordinates());
-	  this._ocaMap.put(oca, e);
-	};
-	EdgeList.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeList.prototype.getClass = function getClass () {
-	  return EdgeList
-	};
 
-	var SegmentIntersector = function SegmentIntersector () {};
+	  function startFromNode(node) {
+	    var startGraph = context.graph();
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
+	    context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	  }
 
-	SegmentIntersector.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {};
-	SegmentIntersector.prototype.isDone = function isDone () {};
-	SegmentIntersector.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentIntersector.prototype.getClass = function getClass () {
-	  return SegmentIntersector
-	};
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	var IntersectionAdder = function IntersectionAdder () {
-	  this._hasIntersection = false;
-	  this._hasProper = false;
-	  this._hasProperInterior = false;
-	  this._hasInterior = false;
-	  this._properIntersectionPoint = null;
-	  this._li = null;
-	  this._isSelfIntersection = null;
-	  this.numIntersections = 0;
-	  this.numInteriorIntersections = 0;
-	  this.numProperIntersections = 0;
-	  this.numTests = 0;
-	  var li = arguments[0];
-	  this._li = li;
-	};
-	IntersectionAdder.prototype.isTrivialIntersection = function isTrivialIntersection (e0, segIndex0, e1, segIndex1) {
-	  if (e0 === e1) {
-	    if (this._li.getIntersectionNum() === 1) {
-	      if (IntersectionAdder.isAdjacentSegments(segIndex0, segIndex1)) { return true }
-	      if (e0.isClosed()) {
-	        var maxSegIndex = e0.size() - 1;
-	        if ((segIndex0 === 0 && segIndex1 === maxSegIndex) ||
-	            (segIndex1 === 0 && segIndex0 === maxSegIndex)) {
-	          return true
-	        }
-	      }
-	    }
-	  }
-	  return false
-	};
-	IntersectionAdder.prototype.getProperIntersectionPoint = function getProperIntersectionPoint () {
-	  return this._properIntersectionPoint
-	};
-	IntersectionAdder.prototype.hasProperInteriorIntersection = function hasProperInteriorIntersection () {
-	  return this._hasProperInterior
-	};
-	IntersectionAdder.prototype.getLineIntersector = function getLineIntersector () {
-	  return this._li
-	};
-	IntersectionAdder.prototype.hasProperIntersection = function hasProperIntersection () {
-	  return this._hasProper
-	};
-	IntersectionAdder.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {
-	  if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	  this.numTests++;
-	  var p00 = e0.getCoordinates()[segIndex0];
-	  var p01 = e0.getCoordinates()[segIndex0 + 1];
-	  var p10 = e1.getCoordinates()[segIndex1];
-	  var p11 = e1.getCoordinates()[segIndex1 + 1];
-	  this._li.computeIntersection(p00, p01, p10, p11);
-	  if (this._li.hasIntersection()) {
-	    this.numIntersections++;
-	    if (this._li.isInteriorIntersection()) {
-	      this.numInteriorIntersections++;
-	      this._hasInterior = true;
-	    }
-	    if (!this.isTrivialIntersection(e0, segIndex0, e1, segIndex1)) {
-	      this._hasIntersection = true;
-	      e0.addIntersections(this._li, segIndex0, 0);
-	      e1.addIntersections(this._li, segIndex1, 1);
-	      if (this._li.isProper()) {
-	        this.numProperIntersections++;
-	        this._hasProper = true;
-	        this._hasProperInterior = true;
-	      }
-	    }
-	  }
-	};
-	IntersectionAdder.prototype.hasIntersection = function hasIntersection () {
-	  return this._hasIntersection
-	};
-	IntersectionAdder.prototype.isDone = function isDone () {
-	  return false
-	};
-	IntersectionAdder.prototype.hasInteriorIntersection = function hasInteriorIntersection () {
-	  return this._hasInterior
-	};
-	IntersectionAdder.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentIntersector]
-	};
-	IntersectionAdder.prototype.getClass = function getClass () {
-	  return IntersectionAdder
-	};
-	IntersectionAdder.isAdjacentSegments = function isAdjacentSegments (i1, i2) {
-	  return Math.abs(i1 - i2) === 1
-	};
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	var EdgeIntersection = function EdgeIntersection () {
-	  this.coord = null;
-	  this.segmentIndex = null;
-	  this.dist = null;
-	  var coord = arguments[0];
-	  var segmentIndex = arguments[1];
-	  var dist = arguments[2];
-	  this.coord = new Coordinate(coord);
-	  this.segmentIndex = segmentIndex;
-	  this.dist = dist;
-	};
-	EdgeIntersection.prototype.getSegmentIndex = function getSegmentIndex () {
-	  return this.segmentIndex
-	};
-	EdgeIntersection.prototype.getCoordinate = function getCoordinate () {
-	  return this.coord
-	};
-	EdgeIntersection.prototype.print = function print (out) {
-	  out.print(this.coord);
-	  out.print(' seg # = ' + this.segmentIndex);
-	  out.println(' dist = ' + this.dist);
-	};
-	EdgeIntersection.prototype.compareTo = function compareTo (obj) {
-	  var other = obj;
-	  return this.compare(other.segmentIndex, other.dist)
-	};
-	EdgeIntersection.prototype.isEndPoint = function isEndPoint (maxSegmentIndex) {
-	  if (this.segmentIndex === 0 && this.dist === 0.0) { return true }
-	  if (this.segmentIndex === maxSegmentIndex) { return true }
-	  return false
-	};
-	EdgeIntersection.prototype.toString = function toString () {
-	  return this.coord + ' seg # = ' + this.segmentIndex + ' dist = ' + this.dist
-	};
-	EdgeIntersection.prototype.getDistance = function getDistance () {
-	  return this.dist
-	};
-	EdgeIntersection.prototype.compare = function compare (segmentIndex, dist) {
-	  if (this.segmentIndex < segmentIndex) { return -1 }
-	  if (this.segmentIndex > segmentIndex) { return 1 }
-	  if (this.dist < dist) { return -1 }
-	  if (this.dist > dist) { return 1 }
-	  return 0
-	};
-	EdgeIntersection.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	EdgeIntersection.prototype.getClass = function getClass () {
-	  return EdgeIntersection
-	};
+	  return mode;
+	}
 
-	var EdgeIntersectionList = function EdgeIntersectionList () {
-	  this._nodeMap = new TreeMap();
-	  this.edge = null;
-	  var edge = arguments[0];
-	  this.edge = edge;
-	};
-	EdgeIntersectionList.prototype.print = function print (out) {
-	  out.println('Intersections:');
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var ei = it.next();
-	    ei.print(out);
+	function modeAddLine(context, mode) {
+	  mode.id = 'add-line';
+	  var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
+	  var defaultTags = {};
+	  if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'line');
+
+	  function start(loc) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
+	    });
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id));
+	    context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
 	  }
-	};
-	EdgeIntersectionList.prototype.iterator = function iterator () {
-	  return this._nodeMap.values().iterator()
-	};
-	EdgeIntersectionList.prototype.addSplitEdges = function addSplitEdges (edgeList) {
-	    var this$1 = this;
-
-	  this.addEndpoints();
-	  var it = this.iterator();
-	  var eiPrev = it.next();
-	  while (it.hasNext()) {
-	    var ei = it.next();
-	    var newEdge = this$1.createSplitEdge(eiPrev, ei);
-	    edgeList.add(newEdge);
-	    eiPrev = ei;
+
+	  function startFromWay(loc, edge) {
+	    var startGraph = context.graph();
+	    var node = osmNode({
+	      loc: loc
+	    });
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionAddMidpoint({
+	      loc: loc,
+	      edge: edge
+	    }, node));
+	    context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
 	  }
-	};
-	EdgeIntersectionList.prototype.addEndpoints = function addEndpoints () {
-	  var maxSegIndex = this.edge.pts.length - 1;
-	  this.add(this.edge.pts[0], 0, 0.0);
-	  this.add(this.edge.pts[maxSegIndex], maxSegIndex, 0.0);
-	};
-	EdgeIntersectionList.prototype.createSplitEdge = function createSplitEdge (ei0, ei1) {
-	    var this$1 = this;
-
-	  var npts = ei1.segmentIndex - ei0.segmentIndex + 2;
-	  var lastSegStartPt = this.edge.pts[ei1.segmentIndex];
-	  var useIntPt1 = ei1.dist > 0.0 || !ei1.coord.equals2D(lastSegStartPt);
-	  if (!useIntPt1) {
-	    npts--;
-	  }
-	  var pts = new Array(npts).fill(null);
-	  var ipt = 0;
-	  pts[ipt++] = new Coordinate(ei0.coord);
-	  for (var i = ei0.segmentIndex + 1; i <= ei1.segmentIndex; i++) {
-	    pts[ipt++] = this$1.edge.pts[i];
-	  }
-	  if (useIntPt1) { pts[ipt] = ei1.coord; }
-	  return new Edge(pts, new Label(this.edge._label))
-	};
-	EdgeIntersectionList.prototype.add = function add (intPt, segmentIndex, dist) {
-	  var eiNew = new EdgeIntersection(intPt, segmentIndex, dist);
-	  var ei = this._nodeMap.get(eiNew);
-	  if (ei !== null) {
-	    return ei
-	  }
-	  this._nodeMap.put(eiNew, eiNew);
-	  return eiNew
-	};
-	EdgeIntersectionList.prototype.isIntersection = function isIntersection (pt) {
-	  for (var it = this.iterator(); it.hasNext();) {
-	    var ei = it.next();
-	    if (ei.coord.equals(pt)) { return true }
+
+	  function startFromNode(node) {
+	    var startGraph = context.graph();
+	    var way = osmWay({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id));
+	    context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
 	  }
-	  return false
-	};
-	EdgeIntersectionList.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeIntersectionList.prototype.getClass = function getClass () {
-	  return EdgeIntersectionList
-	};
 
-	var MonotoneChainIndexer = function MonotoneChainIndexer () {};
+	  mode.enter = function () {
+	    context.install(behavior);
+	  };
 
-	MonotoneChainIndexer.prototype.getChainStartIndices = function getChainStartIndices (pts) {
-	    var this$1 = this;
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	  var start = 0;
-	  var startIndexList = new ArrayList();
-	  startIndexList.add(new Integer(start));
-	  do {
-	    var last = this$1.findChainEnd(pts, start);
-	    startIndexList.add(new Integer(last));
-	    start = last;
-	  } while (start < pts.length - 1)
-	  var startIndex = MonotoneChainIndexer.toIntArray(startIndexList);
-	  return startIndex
-	};
-	MonotoneChainIndexer.prototype.findChainEnd = function findChainEnd (pts, start) {
-	  var chainQuad = Quadrant.quadrant(pts[start], pts[start + 1]);
-	  var last = start + 1;
-	  while (last < pts.length) {
-	    var quad = Quadrant.quadrant(pts[last - 1], pts[last]);
-	    if (quad !== chainQuad) { break }
-	    last++;
-	  }
-	  return last - 1
-	};
-	MonotoneChainIndexer.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainIndexer.prototype.getClass = function getClass () {
-	  return MonotoneChainIndexer
-	};
-	MonotoneChainIndexer.toIntArray = function toIntArray (list) {
-	  var array = new Array(list.size()).fill(null);
-	  for (var i = 0; i < array.length; i++) {
-	    array[i] = list.get(i).intValue();
-	  }
-	  return array
-	};
+	  return mode;
+	}
 
-	var MonotoneChainEdge = function MonotoneChainEdge () {
-	  this.e = null;
-	  this.pts = null;
-	  this.startIndex = null;
-	  this.env1 = new Envelope();
-	  this.env2 = new Envelope();
-	  var e = arguments[0];
-	  this.e = e;
-	  this.pts = e.getCoordinates();
-	  var mcb = new MonotoneChainIndexer();
-	  this.startIndex = mcb.getChainStartIndices(this.pts);
-	};
-	MonotoneChainEdge.prototype.getCoordinates = function getCoordinates () {
-	  return this.pts
-	};
-	MonotoneChainEdge.prototype.getMaxX = function getMaxX (chainIndex) {
-	  var x1 = this.pts[this.startIndex[chainIndex]].x;
-	  var x2 = this.pts[this.startIndex[chainIndex + 1]].x;
-	  return x1 > x2 ? x1 : x2
-	};
-	MonotoneChainEdge.prototype.getMinX = function getMinX (chainIndex) {
-	  var x1 = this.pts[this.startIndex[chainIndex]].x;
-	  var x2 = this.pts[this.startIndex[chainIndex + 1]].x;
-	  return x1 < x2 ? x1 : x2
-	};
-	MonotoneChainEdge.prototype.computeIntersectsForChain = function computeIntersectsForChain () {
-	  if (arguments.length === 4) {
-	    var chainIndex0 = arguments[0];
-	    var mce = arguments[1];
-	    var chainIndex1 = arguments[2];
-	    var si = arguments[3];
-	    this.computeIntersectsForChain(this.startIndex[chainIndex0], this.startIndex[chainIndex0 + 1], mce, mce.startIndex[chainIndex1], mce.startIndex[chainIndex1 + 1], si);
-	  } else if (arguments.length === 6) {
-	    var start0 = arguments[0];
-	    var end0 = arguments[1];
-	    var mce$1 = arguments[2];
-	    var start1 = arguments[3];
-	    var end1 = arguments[4];
-	    var ei = arguments[5];
-	    var p00 = this.pts[start0];
-	    var p01 = this.pts[end0];
-	    var p10 = mce$1.pts[start1];
-	    var p11 = mce$1.pts[end1];
-	    if (end0 - start0 === 1 && end1 - start1 === 1) {
-	      ei.addIntersections(this.e, start0, mce$1.e, start1);
-	      return null
-	    }
-	    this.env1.init(p00, p01);
-	    this.env2.init(p10, p11);
-	    if (!this.env1.intersects(this.env2)) { return null }
-	    var mid0 = Math.trunc((start0 + end0) / 2);
-	    var mid1 = Math.trunc((start1 + end1) / 2);
-	    if (start0 < mid0) {
-	      if (start1 < mid1) { this.computeIntersectsForChain(start0, mid0, mce$1, start1, mid1, ei); }
-	      if (mid1 < end1) { this.computeIntersectsForChain(start0, mid0, mce$1, mid1, end1, ei); }
-	    }
-	    if (mid0 < end0) {
-	      if (start1 < mid1) { this.computeIntersectsForChain(mid0, end0, mce$1, start1, mid1, ei); }
-	      if (mid1 < end1) { this.computeIntersectsForChain(mid0, end0, mce$1, mid1, end1, ei); }
-	    }
+	function modeAddPoint(context, mode) {
+	  mode.id = 'add-point';
+	  var behavior = behaviorDraw(context).on('click', add).on('clickWay', addWay).on('clickNode', addNode).on('cancel', cancel).on('finish', cancel);
+	  var defaultTags = {};
+	  if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'point');
+
+	  function add(loc) {
+	    var node = osmNode({
+	      loc: loc,
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddEntity(node), _t('operations.add.annotation.point'));
+	    enterSelectMode(node);
 	  }
-	};
-	MonotoneChainEdge.prototype.getStartIndexes = function getStartIndexes () {
-	  return this.startIndex
-	};
-	MonotoneChainEdge.prototype.computeIntersects = function computeIntersects (mce, si) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < this.startIndex.length - 1; i++) {
-	    for (var j = 0; j < mce.startIndex.length - 1; j++) {
-	      this$1.computeIntersectsForChain(i, mce, j, si);
-	    }
+	  function addWay(loc, edge) {
+	    var node = osmNode({
+	      tags: defaultTags
+	    });
+	    context.perform(actionAddMidpoint({
+	      loc: loc,
+	      edge: edge
+	    }, node), _t('operations.add.annotation.vertex'));
+	    enterSelectMode(node);
 	  }
-	};
-	MonotoneChainEdge.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainEdge.prototype.getClass = function getClass () {
-	  return MonotoneChainEdge
-	};
 
-	var Depth = function Depth () {
-	  var this$1 = this;
+	  function enterSelectMode(node) {
+	    context.enter(modeSelect(context, [node.id]).newFeature(true));
+	  }
 
-	  this._depth = Array(2).fill().map(function () { return Array(3); });
-	  for (var i = 0; i < 2; i++) {
-	    for (var j = 0; j < 3; j++) {
-	      this$1._depth[i][j] = Depth.NULL_VALUE;
+	  function addNode(node) {
+	    if (Object.keys(defaultTags).length === 0) {
+	      enterSelectMode(node);
+	      return;
 	    }
-	  }
-	};
 
-	var staticAccessors$31 = { NULL_VALUE: { configurable: true } };
-	Depth.prototype.getDepth = function getDepth (geomIndex, posIndex) {
-	  return this._depth[geomIndex][posIndex]
-	};
-	Depth.prototype.setDepth = function setDepth (geomIndex, posIndex, depthValue) {
-	  this._depth[geomIndex][posIndex] = depthValue;
-	};
-	Depth.prototype.isNull = function isNull () {
-	    var this$1 = this;
+	    var tags = Object.assign({}, node.tags); // shallow copy
 
-	  if (arguments.length === 0) {
-	    for (var i = 0; i < 2; i++) {
-	      for (var j = 0; j < 3; j++) {
-	        if (this$1._depth[i][j] !== Depth.NULL_VALUE) { return false }
-	      }
+	    for (var key in defaultTags) {
+	      tags[key] = defaultTags[key];
 	    }
-	    return true
-	  } else if (arguments.length === 1) {
-	    var geomIndex = arguments[0];
-	    return this._depth[geomIndex][1] === Depth.NULL_VALUE
-	  } else if (arguments.length === 2) {
-	    var geomIndex$1 = arguments[0];
-	    var posIndex = arguments[1];
-	    return this._depth[geomIndex$1][posIndex] === Depth.NULL_VALUE
-	  }
-	};
-	Depth.prototype.normalize = function normalize () {
-	    var this$1 = this;
 
-	  for (var i = 0; i < 2; i++) {
-	    if (!this$1.isNull(i)) {
-	      var minDepth = this$1._depth[i][1];
-	      if (this$1._depth[i][2] < minDepth) { minDepth = this$1._depth[i][2]; }
-	      if (minDepth < 0) { minDepth = 0; }
-	      for (var j = 1; j < 3; j++) {
-	        var newValue = 0;
-	        if (this$1._depth[i][j] > minDepth) { newValue = 1; }
-	        this$1._depth[i][j] = newValue;
-	      }
-	    }
+	    context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
+	    enterSelectMode(node);
 	  }
-	};
-	Depth.prototype.getDelta = function getDelta (geomIndex) {
-	  return this._depth[geomIndex][Position.RIGHT] - this._depth[geomIndex][Position.LEFT]
-	};
-	Depth.prototype.getLocation = function getLocation (geomIndex, posIndex) {
-	  if (this._depth[geomIndex][posIndex] <= 0) { return Location.EXTERIOR }
-	  return Location.INTERIOR
-	};
-	Depth.prototype.toString = function toString () {
-	  return 'A: ' + this._depth[0][1] + ',' + this._depth[0][2] + ' B: ' + this._depth[1][1] + ',' + this._depth[1][2]
-	};
-	Depth.prototype.add = function add () {
-	    var this$1 = this;
 
-	  if (arguments.length === 1) {
-	    var lbl = arguments[0];
-	    for (var i = 0; i < 2; i++) {
-	      for (var j = 1; j < 3; j++) {
-	        var loc = lbl.getLocation(i, j);
-	        if (loc === Location.EXTERIOR || loc === Location.INTERIOR) {
-	          if (this$1.isNull(i, j)) {
-	            this$1._depth[i][j] = Depth.depthAtLocation(loc);
-	          } else { this$1._depth[i][j] += Depth.depthAtLocation(loc); }
-	        }
-	      }
-	    }
-	  } else if (arguments.length === 3) {
-	    var geomIndex = arguments[0];
-	    var posIndex = arguments[1];
-	    var location = arguments[2];
-	    if (location === Location.INTERIOR) { this._depth[geomIndex][posIndex]++; }
-	  }
-	};
-	Depth.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Depth.prototype.getClass = function getClass () {
-	  return Depth
-	};
-	Depth.depthAtLocation = function depthAtLocation (location) {
-	  if (location === Location.EXTERIOR) { return 0 }
-	  if (location === Location.INTERIOR) { return 1 }
-	  return Depth.NULL_VALUE
-	};
-	staticAccessors$31.NULL_VALUE.get = function () { return -1 };
-
-	Object.defineProperties( Depth, staticAccessors$31 );
-
-	var Edge = (function (GraphComponent$$1) {
-	  function Edge () {
-	    GraphComponent$$1.call(this);
-	    this.pts = null;
-	    this._env = null;
-	    this.eiList = new EdgeIntersectionList(this);
-	    this._name = null;
-	    this._mce = null;
-	    this._isIsolated = true;
-	    this._depth = new Depth();
-	    this._depthDelta = 0;
-	    if (arguments.length === 1) {
-	      var pts = arguments[0];
-	      Edge.call(this, pts, null);
-	    } else if (arguments.length === 2) {
-	      var pts$1 = arguments[0];
-	      var label = arguments[1];
-	      this.pts = pts$1;
-	      this._label = label;
-	    }
+	  function cancel() {
+	    context.enter(modeBrowse(context));
 	  }
 
-	  if ( GraphComponent$$1 ) { Edge.__proto__ = GraphComponent$$1; }
-	  Edge.prototype = Object.create( GraphComponent$$1 && GraphComponent$$1.prototype );
-	  Edge.prototype.constructor = Edge;
-	  Edge.prototype.getDepth = function getDepth () {
-	    return this._depth
-	  };
-	  Edge.prototype.getCollapsedEdge = function getCollapsedEdge () {
-	    var newPts = new Array(2).fill(null);
-	    newPts[0] = this.pts[0];
-	    newPts[1] = this.pts[1];
-	    var newe = new Edge(newPts, Label.toLineLabel(this._label));
-	    return newe
-	  };
-	  Edge.prototype.isIsolated = function isIsolated () {
-	    return this._isIsolated
+	  mode.enter = function () {
+	    context.install(behavior);
 	  };
-	  Edge.prototype.getCoordinates = function getCoordinates () {
-	    return this.pts
-	  };
-	  Edge.prototype.setIsolated = function setIsolated (isIsolated) {
-	    this._isIsolated = isIsolated;
-	  };
-	  Edge.prototype.setName = function setName (name) {
-	    this._name = name;
-	  };
-	  Edge.prototype.equals = function equals (o) {
-	    var this$1 = this;
 
-	    if (!(o instanceof Edge)) { return false }
-	    var e = o;
-	    if (this.pts.length !== e.pts.length) { return false }
-	    var isEqualForward = true;
-	    var isEqualReverse = true;
-	    var iRev = this.pts.length;
-	    for (var i = 0; i < this.pts.length; i++) {
-	      if (!this$1.pts[i].equals2D(e.pts[i])) {
-	        isEqualForward = false;
-	      }
-	      if (!this$1.pts[i].equals2D(e.pts[--iRev])) {
-	        isEqualReverse = false;
-	      }
-	      if (!isEqualForward && !isEqualReverse) { return false }
-	    }
-	    return true
-	  };
-	  Edge.prototype.getCoordinate = function getCoordinate () {
-	    if (arguments.length === 0) {
-	      if (this.pts.length > 0) { return this.pts[0] }
-	      return null
-	    } else if (arguments.length === 1) {
-	      var i = arguments[0];
-	      return this.pts[i]
-	    }
+	  mode.exit = function () {
+	    context.uninstall(behavior);
 	  };
-	  Edge.prototype.print = function print (out) {
-	    var this$1 = this;
 
-	    out.print('edge ' + this._name + ': ');
-	    out.print('LINESTRING (');
-	    for (var i = 0; i < this.pts.length; i++) {
-	      if (i > 0) { out.print(','); }
-	      out.print(this$1.pts[i].x + ' ' + this$1.pts[i].y);
-	    }
-	    out.print(')  ' + this._label + ' ' + this._depthDelta);
-	  };
-	  Edge.prototype.computeIM = function computeIM (im) {
-	    Edge.updateIM(this._label, im);
-	  };
-	  Edge.prototype.isCollapsed = function isCollapsed () {
-	    if (!this._label.isArea()) { return false }
-	    if (this.pts.length !== 3) { return false }
-	    if (this.pts[0].equals(this.pts[2])) { return true }
-	    return false
-	  };
-	  Edge.prototype.isClosed = function isClosed () {
-	    return this.pts[0].equals(this.pts[this.pts.length - 1])
-	  };
-	  Edge.prototype.getMaximumSegmentIndex = function getMaximumSegmentIndex () {
-	    return this.pts.length - 1
-	  };
-	  Edge.prototype.getDepthDelta = function getDepthDelta () {
-	    return this._depthDelta
-	  };
-	  Edge.prototype.getNumPoints = function getNumPoints () {
-	    return this.pts.length
-	  };
-	  Edge.prototype.printReverse = function printReverse (out) {
-	    var this$1 = this;
+	  return mode;
+	}
 
-	    out.print('edge ' + this._name + ': ');
-	    for (var i = this.pts.length - 1; i >= 0; i--) {
-	      out.print(this$1.pts[i] + ' ');
-	    }
-	    out.println('');
-	  };
-	  Edge.prototype.getMonotoneChainEdge = function getMonotoneChainEdge () {
-	    if (this._mce === null) { this._mce = new MonotoneChainEdge(this); }
-	    return this._mce
-	  };
-	  Edge.prototype.getEnvelope = function getEnvelope () {
-	    var this$1 = this;
+	function modeAddNote(context) {
+	  var mode = {
+	    id: 'add-note',
+	    button: 'note',
+	    description: _t.html('modes.add_note.description'),
+	    key: _t('modes.add_note.key')
+	  };
+	  var behavior = behaviorDraw(context).on('click', add).on('cancel', cancel).on('finish', cancel);
+
+	  function add(loc) {
+	    var osm = services.osm;
+	    if (!osm) return;
+	    var note = osmNote({
+	      loc: loc,
+	      status: 'open',
+	      comments: []
+	    });
+	    osm.replaceNote(note); // force a reraw (there is no history change that would otherwise do this)
 
-	    if (this._env === null) {
-	      this._env = new Envelope();
-	      for (var i = 0; i < this.pts.length; i++) {
-	        this$1._env.expandToInclude(this$1.pts[i]);
-	      }
-	    }
-	    return this._env
-	  };
-	  Edge.prototype.addIntersection = function addIntersection (li, segmentIndex, geomIndex, intIndex) {
-	    var intPt = new Coordinate(li.getIntersection(intIndex));
-	    var normalizedSegmentIndex = segmentIndex;
-	    var dist = li.getEdgeDistance(geomIndex, intIndex);
-	    var nextSegIndex = normalizedSegmentIndex + 1;
-	    if (nextSegIndex < this.pts.length) {
-	      var nextPt = this.pts[nextSegIndex];
-	      if (intPt.equals2D(nextPt)) {
-	        normalizedSegmentIndex = nextSegIndex;
-	        dist = 0.0;
-	      }
-	    }
-	    this.eiList.add(intPt, normalizedSegmentIndex, dist);
-	  };
-	  Edge.prototype.toString = function toString () {
-	    var this$1 = this;
+	    context.map().pan([0, 0]);
+	    context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
+	  }
 
-	    var buf = new StringBuffer();
-	    buf.append('edge ' + this._name + ': ');
-	    buf.append('LINESTRING (');
-	    for (var i = 0; i < this.pts.length; i++) {
-	      if (i > 0) { buf.append(','); }
-	      buf.append(this$1.pts[i].x + ' ' + this$1.pts[i].y);
-	    }
-	    buf.append(')  ' + this._label + ' ' + this._depthDelta);
-	    return buf.toString()
-	  };
-	  Edge.prototype.isPointwiseEqual = function isPointwiseEqual (e) {
-	    var this$1 = this;
+	  function cancel() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	    if (this.pts.length !== e.pts.length) { return false }
-	    for (var i = 0; i < this.pts.length; i++) {
-	      if (!this$1.pts[i].equals2D(e.pts[i])) {
-	        return false
-	      }
-	    }
-	    return true
-	  };
-	  Edge.prototype.setDepthDelta = function setDepthDelta (depthDelta) {
-	    this._depthDelta = depthDelta;
+	  mode.enter = function () {
+	    context.install(behavior);
 	  };
-	  Edge.prototype.getEdgeIntersectionList = function getEdgeIntersectionList () {
-	    return this.eiList
-	  };
-	  Edge.prototype.addIntersections = function addIntersections (li, segmentIndex, geomIndex) {
-	    var this$1 = this;
 
-	    for (var i = 0; i < li.getIntersectionNum(); i++) {
-	      this$1.addIntersection(li, segmentIndex, geomIndex, i);
-	    }
-	  };
-	  Edge.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  Edge.prototype.getClass = function getClass () {
-	    return Edge
-	  };
-	  Edge.updateIM = function updateIM () {
-	    if (arguments.length === 2) {
-	      var label = arguments[0];
-	      var im = arguments[1];
-	      im.setAtLeastIfValid(label.getLocation(0, Position.ON), label.getLocation(1, Position.ON), 1);
-	      if (label.isArea()) {
-	        im.setAtLeastIfValid(label.getLocation(0, Position.LEFT), label.getLocation(1, Position.LEFT), 2);
-	        im.setAtLeastIfValid(label.getLocation(0, Position.RIGHT), label.getLocation(1, Position.RIGHT), 2);
-	      }
-	    } else { return GraphComponent$$1.prototype.updateIM.apply(this, arguments) }
+	  mode.exit = function () {
+	    context.uninstall(behavior);
 	  };
 
-	  return Edge;
-	}(GraphComponent));
+	  return mode;
+	}
 
-	var BufferBuilder = function BufferBuilder (bufParams) {
-	  this._workingPrecisionModel = null;
-	  this._workingNoder = null;
-	  this._geomFact = null;
-	  this._graph = null;
-	  this._edgeList = new EdgeList();
-	  this._bufParams = bufParams || null;
-	};
-	BufferBuilder.prototype.setWorkingPrecisionModel = function setWorkingPrecisionModel (pm) {
-	  this._workingPrecisionModel = pm;
-	};
-	BufferBuilder.prototype.insertUniqueEdge = function insertUniqueEdge (e) {
-	  var existingEdge = this._edgeList.findEqualEdge(e);
-	  if (existingEdge !== null) {
-	    var existingLabel = existingEdge.getLabel();
-	    var labelToMerge = e.getLabel();
-	    if (!existingEdge.isPointwiseEqual(e)) {
-	      labelToMerge = new Label(e.getLabel());
-	      labelToMerge.flip();
-	    }
-	    existingLabel.merge(labelToMerge);
-	    var mergeDelta = BufferBuilder.depthDelta(labelToMerge);
-	    var existingDelta = existingEdge.getDepthDelta();
-	    var newDelta = existingDelta + mergeDelta;
-	    existingEdge.setDepthDelta(newDelta);
-	  } else {
-	    this._edgeList.add(e);
-	    e.setDepthDelta(BufferBuilder.depthDelta(e.getLabel()));
-	  }
-	};
-	BufferBuilder.prototype.buildSubgraphs = function buildSubgraphs (subgraphList, polyBuilder) {
-	  var processedGraphs = new ArrayList();
-	  for (var i = subgraphList.iterator(); i.hasNext();) {
-	    var subgraph = i.next();
-	    var p = subgraph.getRightmostCoordinate();
-	    var locater = new SubgraphDepthLocater(processedGraphs);
-	    var outsideDepth = locater.getDepth(p);
-	    subgraph.computeDepth(outsideDepth);
-	    subgraph.findResultEdges();
-	    processedGraphs.add(subgraph);
-	    polyBuilder.add(subgraph.getDirectedEdges(), subgraph.getNodes());
-	  }
-	};
-	BufferBuilder.prototype.createSubgraphs = function createSubgraphs (graph) {
-	  var subgraphList = new ArrayList();
-	  for (var i = graph.getNodes().iterator(); i.hasNext();) {
-	    var node = i.next();
-	    if (!node.isVisited()) {
-	      var subgraph = new BufferSubgraph();
-	      subgraph.create(node);
-	      subgraphList.add(subgraph);
-	    }
-	  }
-	  Collections.sort(subgraphList, Collections.reverseOrder());
-	  return subgraphList
-	};
-	BufferBuilder.prototype.createEmptyResultGeometry = function createEmptyResultGeometry () {
-	  var emptyGeom = this._geomFact.createPolygon();
-	  return emptyGeom
-	};
-	BufferBuilder.prototype.getNoder = function getNoder (precisionModel) {
-	  if (this._workingNoder !== null) { return this._workingNoder }
-	  var noder = new MCIndexNoder();
-	  var li = new RobustLineIntersector();
-	  li.setPrecisionModel(precisionModel);
-	  noder.setSegmentIntersector(new IntersectionAdder(li));
-	  return noder
-	};
-	BufferBuilder.prototype.buffer = function buffer (g, distance) {
-	  var precisionModel = this._workingPrecisionModel;
-	  if (precisionModel === null) { precisionModel = g.getPrecisionModel(); }
-	  this._geomFact = g.getFactory();
-	  var curveBuilder = new OffsetCurveBuilder(precisionModel, this._bufParams);
-	  var curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);
-	  var bufferSegStrList = curveSetBuilder.getCurves();
-	  if (bufferSegStrList.size() <= 0) {
-	    return this.createEmptyResultGeometry()
-	  }
-	  this.computeNodedEdges(bufferSegStrList, precisionModel);
-	  this._graph = new PlanarGraph(new OverlayNodeFactory());
-	  this._graph.addEdges(this._edgeList.getEdges());
-	  var subgraphList = this.createSubgraphs(this._graph);
-	  var polyBuilder = new PolygonBuilder(this._geomFact);
-	  this.buildSubgraphs(subgraphList, polyBuilder);
-	  var resultPolyList = polyBuilder.getPolygons();
-	  if (resultPolyList.size() <= 0) {
-	    return this.createEmptyResultGeometry()
-	  }
-	  var resultGeom = this._geomFact.buildGeometry(resultPolyList);
-	  return resultGeom
-	};
-	BufferBuilder.prototype.computeNodedEdges = function computeNodedEdges (bufferSegStrList, precisionModel) {
-	    var this$1 = this;
-
-	  var noder = this.getNoder(precisionModel);
-	  noder.computeNodes(bufferSegStrList);
-	  var nodedSegStrings = noder.getNodedSubstrings();
-	  for (var i = nodedSegStrings.iterator(); i.hasNext();) {
-	    var segStr = i.next();
-	    var pts = segStr.getCoordinates();
-	    if (pts.length === 2 && pts[0].equals2D(pts[1])) { continue }
-	    var oldLabel = segStr.getData();
-	    var edge = new Edge(segStr.getCoordinates(), new Label(oldLabel));
-	    this$1.insertUniqueEdge(edge);
+	function uiConflicts(context) {
+	  var dispatch$1 = dispatch('cancel', 'save');
+	  var keybinding = utilKeybinding('conflicts');
+
+	  var _origChanges;
+
+	  var _conflictList;
+
+	  var _shownConflictIndex;
+
+	  function keybindingOn() {
+	    select(document).call(keybinding.on('⎋', cancel, true));
 	  }
-	};
-	BufferBuilder.prototype.setNoder = function setNoder (noder) {
-	  this._workingNoder = noder;
-	};
-	BufferBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferBuilder.prototype.getClass = function getClass () {
-	  return BufferBuilder
-	};
-	BufferBuilder.depthDelta = function depthDelta (label) {
-	  var lLoc = label.getLocation(0, Position.LEFT);
-	  var rLoc = label.getLocation(0, Position.RIGHT);
-	  if (lLoc === Location.INTERIOR && rLoc === Location.EXTERIOR) { return 1; } else if (lLoc === Location.EXTERIOR && rLoc === Location.INTERIOR) { return -1 }
-	  return 0
-	};
-	BufferBuilder.convertSegStrings = function convertSegStrings (it) {
-	  var fact = new GeometryFactory();
-	  var lines = new ArrayList();
-	  while (it.hasNext()) {
-	    var ss = it.next();
-	    var line = fact.createLineString(ss.getCoordinates());
-	    lines.add(line);
-	  }
-	  return fact.buildGeometry(lines)
-	};
 
-	var ScaledNoder = function ScaledNoder () {
-	  this._noder = null;
-	  this._scaleFactor = null;
-	  this._offsetX = null;
-	  this._offsetY = null;
-	  this._isScaled = false;
-	  if (arguments.length === 2) {
-	    var noder = arguments[0];
-	    var scaleFactor = arguments[1];
-	    this._noder = noder;
-	    this._scaleFactor = scaleFactor;
-	    this._offsetX = 0.0;
-	    this._offsetY = 0.0;
-	    this._isScaled = !this.isIntegerPrecision();
-	  } else if (arguments.length === 4) {
-	    var noder$1 = arguments[0];
-	    var scaleFactor$1 = arguments[1];
-	    var offsetX = arguments[2];
-	    var offsetY = arguments[3];
-	    this._noder = noder$1;
-	    this._scaleFactor = scaleFactor$1;
-	    this._offsetX = offsetX;
-	    this._offsetY = offsetY;
-	    this._isScaled = !this.isIntegerPrecision();
+	  function keybindingOff() {
+	    select(document).call(keybinding.unbind);
 	  }
-	};
-	ScaledNoder.prototype.rescale = function rescale () {
-	    var this$1 = this;
-
-	  if (hasInterface(arguments[0], Collection)) {
-	    var segStrings = arguments[0];
-	    for (var i = segStrings.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      this$1.rescale(ss.getCoordinates());
-	    }
-	  } else if (arguments[0] instanceof Array) {
-	    var pts = arguments[0];
-	    // let p0 = null
-	    // let p1 = null
-	    // if (pts.length === 2) {
-	    // p0 = new Coordinate(pts[0])
-	    // p1 = new Coordinate(pts[1])
-	    // }
-	    for (var i$1 = 0; i$1 < pts.length; i$1++) {
-	      pts[i$1].x = pts[i$1].x / this$1._scaleFactor + this$1._offsetX;
-	      pts[i$1].y = pts[i$1].y / this$1._scaleFactor + this$1._offsetY;
-	    }
-	    if (pts.length === 2 && pts[0].equals2D(pts[1])) {
-	      System.out.println(pts);
-	    }
+
+	  function tryAgain() {
+	    keybindingOff();
+	    dispatch$1.call('save');
 	  }
-	};
-	ScaledNoder.prototype.scale = function scale () {
-	    var this$1 = this;
-
-	  if (hasInterface(arguments[0], Collection)) {
-	    var segStrings = arguments[0];
-	    var nodedSegmentStrings = new ArrayList();
-	    for (var i = segStrings.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      nodedSegmentStrings.add(new NodedSegmentString(this$1.scale(ss.getCoordinates()), ss.getData()));
-	    }
-	    return nodedSegmentStrings
-	  } else if (arguments[0] instanceof Array) {
-	    var pts = arguments[0];
-	    var roundPts = new Array(pts.length).fill(null);
-	    for (var i$1 = 0; i$1 < pts.length; i$1++) {
-	      roundPts[i$1] = new Coordinate(Math.round((pts[i$1].x - this$1._offsetX) * this$1._scaleFactor), Math.round((pts[i$1].y - this$1._offsetY) * this$1._scaleFactor), pts[i$1].z);
-	    }
-	    var roundPtsNoDup = CoordinateArrays.removeRepeatedPoints(roundPts);
-	    return roundPtsNoDup
+
+	  function cancel() {
+	    keybindingOff();
+	    dispatch$1.call('cancel');
 	  }
-	};
-	ScaledNoder.prototype.isIntegerPrecision = function isIntegerPrecision () {
-	  return this._scaleFactor === 1.0
-	};
-	ScaledNoder.prototype.getNodedSubstrings = function getNodedSubstrings () {
-	  var splitSS = this._noder.getNodedSubstrings();
-	  if (this._isScaled) { this.rescale(splitSS); }
-	  return splitSS
-	};
-	ScaledNoder.prototype.computeNodes = function computeNodes (inputSegStrings) {
-	  var intSegStrings = inputSegStrings;
-	  if (this._isScaled) { intSegStrings = this.scale(inputSegStrings); }
-	  this._noder.computeNodes(intSegStrings);
-	};
-	ScaledNoder.prototype.interfaces_ = function interfaces_ () {
-	  return [Noder]
-	};
-	ScaledNoder.prototype.getClass = function getClass () {
-	  return ScaledNoder
-	};
 
-	var NodingValidator = function NodingValidator () {
-	  this._li = new RobustLineIntersector();
-	  this._segStrings = null;
-	  var segStrings = arguments[0];
-	  this._segStrings = segStrings;
-	};
+	  function conflicts(selection) {
+	    keybindingOn();
+	    var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+	    headerEnter.append('button').attr('class', 'fr').on('click', cancel).call(svgIcon('#iD-icon-close'));
+	    headerEnter.append('h3').html(_t.html('save.conflict.header'));
+	    var bodyEnter = selection.selectAll('.body').data([0]).enter().append('div').attr('class', 'body fillL');
+	    var conflictsHelpEnter = bodyEnter.append('div').attr('class', 'conflicts-help').html(_t.html('save.conflict.help')); // Download changes link
 
-	var staticAccessors$33 = { fact: { configurable: true } };
-	NodingValidator.prototype.checkEndPtVertexIntersections = function checkEndPtVertexIntersections () {
-	    var this$1 = this;
+	    var detected = utilDetect();
+	    var changeset = new osmChangeset();
+	    delete changeset.id; // Export without changeset_id
 
-	  if (arguments.length === 0) {
-	    for (var i = this._segStrings.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      var pts = ss.getCoordinates();
-	      this$1.checkEndPtVertexIntersections(pts[0], this$1._segStrings);
-	      this$1.checkEndPtVertexIntersections(pts[pts.length - 1], this$1._segStrings);
-	    }
-	  } else if (arguments.length === 2) {
-	    var testPt = arguments[0];
-	    var segStrings = arguments[1];
-	    for (var i$1 = segStrings.iterator(); i$1.hasNext();) {
-	      var ss$1 = i$1.next();
-	      var pts$1 = ss$1.getCoordinates();
-	      for (var j = 1; j < pts$1.length - 1; j++) {
-	        if (pts$1[j].equals(testPt)) { throw new RuntimeException('found endpt/interior pt intersection at index ' + j + ' :pt ' + testPt) }
-	      }
-	    }
-	  }
-	};
-	NodingValidator.prototype.checkInteriorIntersections = function checkInteriorIntersections () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    for (var i = this._segStrings.iterator(); i.hasNext();) {
-	      var ss0 = i.next();
-	      for (var j = this._segStrings.iterator(); j.hasNext();) {
-	        var ss1 = j.next();
-	        this$1.checkInteriorIntersections(ss0, ss1);
-	      }
-	    }
-	  } else if (arguments.length === 2) {
-	    var ss0$1 = arguments[0];
-	    var ss1$1 = arguments[1];
-	    var pts0 = ss0$1.getCoordinates();
-	    var pts1 = ss1$1.getCoordinates();
-	    for (var i0 = 0; i0 < pts0.length - 1; i0++) {
-	      for (var i1 = 0; i1 < pts1.length - 1; i1++) {
-	        this$1.checkInteriorIntersections(ss0$1, i0, ss1$1, i1);
-	      }
-	    }
-	  } else if (arguments.length === 4) {
-	    var e0 = arguments[0];
-	    var segIndex0 = arguments[1];
-	    var e1 = arguments[2];
-	    var segIndex1 = arguments[3];
-	    if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	    var p00 = e0.getCoordinates()[segIndex0];
-	    var p01 = e0.getCoordinates()[segIndex0 + 1];
-	    var p10 = e1.getCoordinates()[segIndex1];
-	    var p11 = e1.getCoordinates()[segIndex1 + 1];
-	    this._li.computeIntersection(p00, p01, p10, p11);
-	    if (this._li.hasIntersection()) {
-	      if (this._li.isProper() || this.hasInteriorIntersection(this._li, p00, p01) || this.hasInteriorIntersection(this._li, p10, p11)) {
-	        throw new RuntimeException('found non-noded intersection at ' + p00 + '-' + p01 + ' and ' + p10 + '-' + p11)
-	      }
-	    }
-	  }
-	};
-	NodingValidator.prototype.checkValid = function checkValid () {
-	  this.checkEndPtVertexIntersections();
-	  this.checkInteriorIntersections();
-	  this.checkCollapses();
-	};
-	NodingValidator.prototype.checkCollapses = function checkCollapses () {
-	    var this$1 = this;
+	    var data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
+	    var blob = new Blob([data], {
+	      type: 'text/xml;charset=utf-8;'
+	    });
+	    var fileName = 'changes.osc';
+	    var linkEnter = conflictsHelpEnter.selectAll('.download-changes').append('a').attr('class', 'download-changes');
 
-	  if (arguments.length === 0) {
-	    for (var i = this._segStrings.iterator(); i.hasNext();) {
-	      var ss = i.next();
-	      this$1.checkCollapses(ss);
-	    }
-	  } else if (arguments.length === 1) {
-	    var ss$1 = arguments[0];
-	    var pts = ss$1.getCoordinates();
-	    for (var i$1 = 0; i$1 < pts.length - 2; i$1++) {
-	      this$1.checkCollapse(pts[i$1], pts[i$1 + 1], pts[i$1 + 2]);
+	    if (detected.download) {
+	      // All except IE11 and Edge
+	      linkEnter // download the data as a file
+	      .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
+	    } else {
+	      // IE11 and Edge
+	      linkEnter // open data uri in a new tab
+	      .attr('target', '_blank').on('click.download', function () {
+	        navigator.msSaveBlob(blob, fileName);
+	      });
 	    }
-	  }
-	};
-	NodingValidator.prototype.hasInteriorIntersection = function hasInteriorIntersection (li, p0, p1) {
-	  for (var i = 0; i < li.getIntersectionNum(); i++) {
-	    var intPt = li.getIntersection(i);
-	    if (!(intPt.equals(p0) || intPt.equals(p1))) { return true }
-	  }
-	  return false
-	};
-	NodingValidator.prototype.checkCollapse = function checkCollapse (p0, p1, p2) {
-	  if (p0.equals(p2)) { throw new RuntimeException('found non-noded collapse at ' + NodingValidator.fact.createLineString([p0, p1, p2])) }
-	};
-	NodingValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	NodingValidator.prototype.getClass = function getClass () {
-	  return NodingValidator
-	};
-	staticAccessors$33.fact.get = function () { return new GeometryFactory() };
-
-	Object.defineProperties( NodingValidator, staticAccessors$33 );
-
-	var HotPixel = function HotPixel () {
-	  this._li = null;
-	  this._pt = null;
-	  this._originalPt = null;
-	  this._ptScaled = null;
-	  this._p0Scaled = null;
-	  this._p1Scaled = null;
-	  this._scaleFactor = null;
-	  this._minx = null;
-	  this._maxx = null;
-	  this._miny = null;
-	  this._maxy = null;
-	  this._corner = new Array(4).fill(null);
-	  this._safeEnv = null;
-	  var pt = arguments[0];
-	  var scaleFactor = arguments[1];
-	  var li = arguments[2];
-	  this._originalPt = pt;
-	  this._pt = pt;
-	  this._scaleFactor = scaleFactor;
-	  this._li = li;
-	  if (scaleFactor <= 0) { throw new IllegalArgumentException('Scale factor must be non-zero') }
-	  if (scaleFactor !== 1.0) {
-	    this._pt = new Coordinate(this.scale(pt.x), this.scale(pt.y));
-	    this._p0Scaled = new Coordinate();
-	    this._p1Scaled = new Coordinate();
-	  }
-	  this.initCorners(this._pt);
-	};
 
-	var staticAccessors$34 = { SAFE_ENV_EXPANSION_FACTOR: { configurable: true } };
-	HotPixel.prototype.intersectsScaled = function intersectsScaled (p0, p1) {
-	  var segMinx = Math.min(p0.x, p1.x);
-	  var segMaxx = Math.max(p0.x, p1.x);
-	  var segMiny = Math.min(p0.y, p1.y);
-	  var segMaxy = Math.max(p0.y, p1.y);
-	  var isOutsidePixelEnv = this._maxx < segMinx || this._minx > segMaxx || this._maxy < segMiny || this._miny > segMaxy;
-	  if (isOutsidePixelEnv) { return false }
-	  var intersects = this.intersectsToleranceSquare(p0, p1);
-	  Assert.isTrue(!(isOutsidePixelEnv && intersects), 'Found bad envelope test');
-	  return intersects
-	};
-	HotPixel.prototype.initCorners = function initCorners (pt) {
-	  var tolerance = 0.5;
-	  this._minx = pt.x - tolerance;
-	  this._maxx = pt.x + tolerance;
-	  this._miny = pt.y - tolerance;
-	  this._maxy = pt.y + tolerance;
-	  this._corner[0] = new Coordinate(this._maxx, this._maxy);
-	  this._corner[1] = new Coordinate(this._minx, this._maxy);
-	  this._corner[2] = new Coordinate(this._minx, this._miny);
-	  this._corner[3] = new Coordinate(this._maxx, this._miny);
-	};
-	HotPixel.prototype.intersects = function intersects (p0, p1) {
-	  if (this._scaleFactor === 1.0) { return this.intersectsScaled(p0, p1) }
-	  this.copyScaled(p0, this._p0Scaled);
-	  this.copyScaled(p1, this._p1Scaled);
-	  return this.intersectsScaled(this._p0Scaled, this._p1Scaled)
-	};
-	HotPixel.prototype.scale = function scale (val) {
-	  return Math.round(val * this._scaleFactor)
-	};
-	HotPixel.prototype.getCoordinate = function getCoordinate () {
-	  return this._originalPt
-	};
-	HotPixel.prototype.copyScaled = function copyScaled (p, pScaled) {
-	  pScaled.x = this.scale(p.x);
-	  pScaled.y = this.scale(p.y);
-	};
-	HotPixel.prototype.getSafeEnvelope = function getSafeEnvelope () {
-	  if (this._safeEnv === null) {
-	    var safeTolerance = HotPixel.SAFE_ENV_EXPANSION_FACTOR / this._scaleFactor;
-	    this._safeEnv = new Envelope(this._originalPt.x - safeTolerance, this._originalPt.x + safeTolerance, this._originalPt.y - safeTolerance, this._originalPt.y + safeTolerance);
+	    linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('save.conflict.download_changes'));
+	    bodyEnter.append('div').attr('class', 'conflict-container fillL3').call(showConflict, 0);
+	    bodyEnter.append('div').attr('class', 'conflicts-done').attr('opacity', 0).style('display', 'none').html(_t.html('save.conflict.done'));
+	    var buttonsEnter = bodyEnter.append('div').attr('class', 'buttons col12 joined conflicts-buttons');
+	    buttonsEnter.append('button').attr('disabled', _conflictList.length > 1).attr('class', 'action conflicts-button col6').html(_t.html('save.title')).on('click.try_again', tryAgain);
+	    buttonsEnter.append('button').attr('class', 'secondary-action conflicts-button col6').html(_t.html('confirm.cancel')).on('click.cancel', cancel);
+	  }
+
+	  function showConflict(selection, index) {
+	    index = utilWrap(index, _conflictList.length);
+	    _shownConflictIndex = index;
+	    var parent = select(selection.node().parentNode); // enable save button if this is the last conflict being reviewed..
+
+	    if (index === _conflictList.length - 1) {
+	      window.setTimeout(function () {
+	        parent.select('.conflicts-button').attr('disabled', null);
+	        parent.select('.conflicts-done').transition().attr('opacity', 1).style('display', 'block');
+	      }, 250);
+	    }
+
+	    var conflict = selection.selectAll('.conflict').data([_conflictList[index]]);
+	    conflict.exit().remove();
+	    var conflictEnter = conflict.enter().append('div').attr('class', 'conflict');
+	    conflictEnter.append('h4').attr('class', 'conflict-count').html(_t.html('save.conflict.count', {
+	      num: index + 1,
+	      total: _conflictList.length
+	    }));
+	    conflictEnter.append('a').attr('class', 'conflict-description').attr('href', '#').html(function (d) {
+	      return d.name;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      zoomToEntity(d.id);
+	    });
+	    var details = conflictEnter.append('div').attr('class', 'conflict-detail-container');
+	    details.append('ul').attr('class', 'conflict-detail-list').selectAll('li').data(function (d) {
+	      return d.details || [];
+	    }).enter().append('li').attr('class', 'conflict-detail-item').html(function (d) {
+	      return d;
+	    });
+	    details.append('div').attr('class', 'conflict-choices').call(addChoices);
+	    details.append('div').attr('class', 'conflict-nav-buttons joined cf').selectAll('button').data(['previous', 'next']).enter().append('button').html(function (d) {
+	      return _t.html('save.conflict.' + d);
+	    }).attr('class', 'conflict-nav-button action col6').attr('disabled', function (d, i) {
+	      return i === 0 && index === 0 || i === 1 && index === _conflictList.length - 1 || null;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      var container = parent.selectAll('.conflict-container');
+	      var sign = d === 'previous' ? -1 : 1;
+	      container.selectAll('.conflict').remove();
+	      container.call(showConflict, index + sign);
+	    });
 	  }
-	  return this._safeEnv
-	};
-	HotPixel.prototype.intersectsPixelClosure = function intersectsPixelClosure (p0, p1) {
-	  this._li.computeIntersection(p0, p1, this._corner[0], this._corner[1]);
-	  if (this._li.hasIntersection()) { return true }
-	  this._li.computeIntersection(p0, p1, this._corner[1], this._corner[2]);
-	  if (this._li.hasIntersection()) { return true }
-	  this._li.computeIntersection(p0, p1, this._corner[2], this._corner[3]);
-	  if (this._li.hasIntersection()) { return true }
-	  this._li.computeIntersection(p0, p1, this._corner[3], this._corner[0]);
-	  if (this._li.hasIntersection()) { return true }
-	  return false
-	};
-	HotPixel.prototype.intersectsToleranceSquare = function intersectsToleranceSquare (p0, p1) {
-	  var intersectsLeft = false;
-	  var intersectsBottom = false;
-	  this._li.computeIntersection(p0, p1, this._corner[0], this._corner[1]);
-	  if (this._li.isProper()) { return true }
-	  this._li.computeIntersection(p0, p1, this._corner[1], this._corner[2]);
-	  if (this._li.isProper()) { return true }
-	  if (this._li.hasIntersection()) { intersectsLeft = true; }
-	  this._li.computeIntersection(p0, p1, this._corner[2], this._corner[3]);
-	  if (this._li.isProper()) { return true }
-	  if (this._li.hasIntersection()) { intersectsBottom = true; }
-	  this._li.computeIntersection(p0, p1, this._corner[3], this._corner[0]);
-	  if (this._li.isProper()) { return true }
-	  if (intersectsLeft && intersectsBottom) { return true }
-	  if (p0.equals(this._pt)) { return true }
-	  if (p1.equals(this._pt)) { return true }
-	  return false
-	};
-	HotPixel.prototype.addSnappedNode = function addSnappedNode (segStr, segIndex) {
-	  var p0 = segStr.getCoordinate(segIndex);
-	  var p1 = segStr.getCoordinate(segIndex + 1);
-	  if (this.intersects(p0, p1)) {
-	    segStr.addIntersection(this.getCoordinate(), segIndex);
-	    return true
-	  }
-	  return false
-	};
-	HotPixel.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	HotPixel.prototype.getClass = function getClass () {
-	  return HotPixel
-	};
-	staticAccessors$34.SAFE_ENV_EXPANSION_FACTOR.get = function () { return 0.75 };
 
-	Object.defineProperties( HotPixel, staticAccessors$34 );
+	  function addChoices(selection) {
+	    var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
+	      return d.choices || [];
+	    }); // enter
 
-	var MonotoneChainSelectAction = function MonotoneChainSelectAction () {
-	  this.tempEnv1 = new Envelope();
-	  this.selectedSegment = new LineSegment();
-	};
-	MonotoneChainSelectAction.prototype.select = function select () {
-	  if (arguments.length === 1) ; else if (arguments.length === 2) {
-	    var mc = arguments[0];
-	    var startIndex = arguments[1];
-	    mc.getLineSegment(startIndex, this.selectedSegment);
-	    this.select(this.selectedSegment);
-	  }
-	};
-	MonotoneChainSelectAction.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChainSelectAction.prototype.getClass = function getClass () {
-	  return MonotoneChainSelectAction
-	};
+	    var choicesEnter = choices.enter().append('li').attr('class', 'layer');
+	    var labelEnter = choicesEnter.append('label');
+	    labelEnter.append('input').attr('type', 'radio').attr('name', function (d) {
+	      return d.id;
+	    }).on('change', function (d3_event, d) {
+	      var ul = this.parentNode.parentNode.parentNode;
+	      ul.__data__.chosen = d.id;
+	      choose(d3_event, ul, d);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return d.text;
+	    }); // update
 
-	var MCIndexPointSnapper = function MCIndexPointSnapper () {
-	  this._index = null;
-	  var index = arguments[0];
-	  this._index = index;
-	};
+	    choicesEnter.merge(choices).each(function (d) {
+	      var ul = this.parentNode;
 
-	var staticAccessors$35 = { HotPixelSnapAction: { configurable: true } };
-	MCIndexPointSnapper.prototype.snap = function snap () {
-	  if (arguments.length === 1) {
-	    var hotPixel = arguments[0];
-	    return this.snap(hotPixel, null, -1)
-	  } else if (arguments.length === 3) {
-	    var hotPixel$1 = arguments[0];
-	    var parentEdge = arguments[1];
-	    var hotPixelVertexIndex = arguments[2];
-	    var pixelEnv = hotPixel$1.getSafeEnvelope();
-	    var hotPixelSnapAction = new HotPixelSnapAction(hotPixel$1, parentEdge, hotPixelVertexIndex);
-	    this._index.query(pixelEnv, {
-	      interfaces_: function () {
-	        return [ItemVisitor]
-	      },
-	      visitItem: function (item) {
-	        var testChain = item;
-	        testChain.select(pixelEnv, hotPixelSnapAction);
+	      if (ul.__data__.chosen === d.id) {
+	        choose(null, ul, d);
 	      }
 	    });
-	    return hotPixelSnapAction.isNodeAdded()
 	  }
-	};
-	MCIndexPointSnapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MCIndexPointSnapper.prototype.getClass = function getClass () {
-	  return MCIndexPointSnapper
-	};
-	staticAccessors$35.HotPixelSnapAction.get = function () { return HotPixelSnapAction };
-
-	Object.defineProperties( MCIndexPointSnapper, staticAccessors$35 );
-
-	var HotPixelSnapAction = (function (MonotoneChainSelectAction$$1) {
-	  function HotPixelSnapAction () {
-	    MonotoneChainSelectAction$$1.call(this);
-	    this._hotPixel = null;
-	    this._parentEdge = null;
-	    this._hotPixelVertexIndex = null;
-	    this._isNodeAdded = false;
-	    var hotPixel = arguments[0];
-	    var parentEdge = arguments[1];
-	    var hotPixelVertexIndex = arguments[2];
-	    this._hotPixel = hotPixel;
-	    this._parentEdge = parentEdge;
-	    this._hotPixelVertexIndex = hotPixelVertexIndex;
-	  }
-
-	  if ( MonotoneChainSelectAction$$1 ) { HotPixelSnapAction.__proto__ = MonotoneChainSelectAction$$1; }
-	  HotPixelSnapAction.prototype = Object.create( MonotoneChainSelectAction$$1 && MonotoneChainSelectAction$$1.prototype );
-	  HotPixelSnapAction.prototype.constructor = HotPixelSnapAction;
-	  HotPixelSnapAction.prototype.isNodeAdded = function isNodeAdded () {
-	    return this._isNodeAdded
-	  };
-	  HotPixelSnapAction.prototype.select = function select () {
-	    if (arguments.length === 2) {
-	      var mc = arguments[0];
-	      var startIndex = arguments[1];
-	      var ss = mc.getContext();
-	      if (this._parentEdge !== null) {
-	        if (ss === this._parentEdge && startIndex === this._hotPixelVertexIndex) { return null }
-	      }
-	      this._isNodeAdded = this._hotPixel.addSnappedNode(ss, startIndex);
-	    } else { return MonotoneChainSelectAction$$1.prototype.select.apply(this, arguments) }
-	  };
-	  HotPixelSnapAction.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  HotPixelSnapAction.prototype.getClass = function getClass () {
-	    return HotPixelSnapAction
-	  };
-
-	  return HotPixelSnapAction;
-	}(MonotoneChainSelectAction));
-
-	var InteriorIntersectionFinderAdder = function InteriorIntersectionFinderAdder () {
-	  this._li = null;
-	  this._interiorIntersections = null;
-	  var li = arguments[0];
-	  this._li = li;
-	  this._interiorIntersections = new ArrayList();
-	};
-	InteriorIntersectionFinderAdder.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {
-	    var this$1 = this;
 
-	  if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	  var p00 = e0.getCoordinates()[segIndex0];
-	  var p01 = e0.getCoordinates()[segIndex0 + 1];
-	  var p10 = e1.getCoordinates()[segIndex1];
-	  var p11 = e1.getCoordinates()[segIndex1 + 1];
-	  this._li.computeIntersection(p00, p01, p10, p11);
-	  if (this._li.hasIntersection()) {
-	    if (this._li.isInteriorIntersection()) {
-	      for (var intIndex = 0; intIndex < this._li.getIntersectionNum(); intIndex++) {
-	        this$1._interiorIntersections.add(this$1._li.getIntersection(intIndex));
+	  function choose(d3_event, ul, datum) {
+	    if (d3_event) d3_event.preventDefault();
+	    select(ul).selectAll('li').classed('active', function (d) {
+	      return d === datum;
+	    }).selectAll('input').property('checked', function (d) {
+	      return d === datum;
+	    });
+	    var extent = geoExtent();
+	    var entity;
+	    entity = context.graph().hasEntity(datum.id);
+	    if (entity) extent._extend(entity.extent(context.graph()));
+	    datum.action();
+	    entity = context.graph().hasEntity(datum.id);
+	    if (entity) extent._extend(entity.extent(context.graph()));
+	    zoomToEntity(datum.id, extent);
+	  }
+
+	  function zoomToEntity(id, extent) {
+	    context.surface().selectAll('.hover').classed('hover', false);
+	    var entity = context.graph().hasEntity(id);
+
+	    if (entity) {
+	      if (extent) {
+	        context.map().trimmedExtent(extent);
+	      } else {
+	        context.map().zoomToEase(entity);
 	      }
-	      e0.addIntersections(this._li, segIndex0, 0);
-	      e1.addIntersections(this._li, segIndex1, 1);
+
+	      context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
+	    }
+	  } // The conflict list should be an array of objects like:
+	  // {
+	  //     id: id,
+	  //     name: entityName(local),
+	  //     details: merge.conflicts(),
+	  //     chosen: 1,
+	  //     choices: [
+	  //         choice(id, keepMine, forceLocal),
+	  //         choice(id, keepTheirs, forceRemote)
+	  //     ]
+	  // }
+
+
+	  conflicts.conflictList = function (_) {
+	    if (!arguments.length) return _conflictList;
+	    _conflictList = _;
+	    return conflicts;
+	  };
+
+	  conflicts.origChanges = function (_) {
+	    if (!arguments.length) return _origChanges;
+	    _origChanges = _;
+	    return conflicts;
+	  };
+
+	  conflicts.shownEntityIds = function () {
+	    if (_conflictList && typeof _shownConflictIndex === 'number') {
+	      return [_conflictList[_shownConflictIndex].id];
 	    }
+
+	    return [];
+	  };
+
+	  return utilRebind(conflicts, dispatch$1, 'on');
+	}
+
+	function uiConfirm(selection) {
+	  var modalSelection = uiModal(selection);
+	  modalSelection.select('.modal').classed('modal-alert', true);
+	  var section = modalSelection.select('.content');
+	  section.append('div').attr('class', 'modal-section header');
+	  section.append('div').attr('class', 'modal-section message-text');
+	  var buttons = section.append('div').attr('class', 'modal-section buttons cf');
+
+	  modalSelection.okButton = function () {
+	    buttons.append('button').attr('class', 'button ok-button action').on('click.confirm', function () {
+	      modalSelection.remove();
+	    }).html(_t.html('confirm.okay')).node().focus();
+	    return modalSelection;
+	  };
+
+	  return modalSelection;
+	}
+
+	function uiChangesetEditor(context) {
+	  var dispatch$1 = dispatch('change');
+	  var formFields = uiFormFields(context);
+	  var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
+
+	  var _fieldsArr;
+
+	  var _tags;
+
+	  var _changesetID;
+
+	  function changesetEditor(selection) {
+	    render(selection);
 	  }
-	};
-	InteriorIntersectionFinderAdder.prototype.isDone = function isDone () {
-	  return false
-	};
-	InteriorIntersectionFinderAdder.prototype.getInteriorIntersections = function getInteriorIntersections () {
-	  return this._interiorIntersections
-	};
-	InteriorIntersectionFinderAdder.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentIntersector]
-	};
-	InteriorIntersectionFinderAdder.prototype.getClass = function getClass () {
-	  return InteriorIntersectionFinderAdder
-	};
 
-	var MCIndexSnapRounder = function MCIndexSnapRounder () {
-	  this._pm = null;
-	  this._li = null;
-	  this._scaleFactor = null;
-	  this._noder = null;
-	  this._pointSnapper = null;
-	  this._nodedSegStrings = null;
-	  var pm = arguments[0];
-	  this._pm = pm;
-	  this._li = new RobustLineIntersector();
-	  this._li.setPrecisionModel(pm);
-	  this._scaleFactor = pm.getScale();
-	};
-	MCIndexSnapRounder.prototype.checkCorrectness = function checkCorrectness (inputSegmentStrings) {
-	  var resultSegStrings = NodedSegmentString.getNodedSubstrings(inputSegmentStrings);
-	  var nv = new NodingValidator(resultSegStrings);
-	  try {
-	    nv.checkValid();
-	  } catch (ex) {
-	    if (ex instanceof Exception) {
-	      ex.printStackTrace();
-	    } else { throw ex }
-	  } finally {}
-	};
-	MCIndexSnapRounder.prototype.getNodedSubstrings = function getNodedSubstrings () {
-	  return NodedSegmentString.getNodedSubstrings(this._nodedSegStrings)
-	};
-	MCIndexSnapRounder.prototype.snapRound = function snapRound (segStrings, li) {
-	  var intersections = this.findInteriorIntersections(segStrings, li);
-	  this.computeIntersectionSnaps(intersections);
-	  this.computeVertexSnaps(segStrings);
-	};
-	MCIndexSnapRounder.prototype.findInteriorIntersections = function findInteriorIntersections (segStrings, li) {
-	  var intFinderAdder = new InteriorIntersectionFinderAdder(li);
-	  this._noder.setSegmentIntersector(intFinderAdder);
-	  this._noder.computeNodes(segStrings);
-	  return intFinderAdder.getInteriorIntersections()
-	};
-	MCIndexSnapRounder.prototype.computeVertexSnaps = function computeVertexSnaps () {
-	    var this$1 = this;
+	  function render(selection) {
+	    var initial = false;
 
-	  if (hasInterface(arguments[0], Collection)) {
-	    var edges = arguments[0];
-	    for (var i0 = edges.iterator(); i0.hasNext();) {
-	      var edge0 = i0.next();
-	      this$1.computeVertexSnaps(edge0);
+	    if (!_fieldsArr) {
+	      initial = true;
+	      var presets = _mainPresetIndex;
+	      _fieldsArr = [uiField(context, presets.field('comment'), null, {
+	        show: true,
+	        revert: false
+	      }), uiField(context, presets.field('source'), null, {
+	        show: false,
+	        revert: false
+	      }), uiField(context, presets.field('hashtags'), null, {
+	        show: false,
+	        revert: false
+	      })];
+
+	      _fieldsArr.forEach(function (field) {
+	        field.on('change', function (t, onInput) {
+	          dispatch$1.call('change', field, undefined, t, onInput);
+	        });
+	      });
 	    }
-	  } else if (arguments[0] instanceof NodedSegmentString) {
-	    var e = arguments[0];
-	    var pts0 = e.getCoordinates();
-	    for (var i = 0; i < pts0.length; i++) {
-	      var hotPixel = new HotPixel(pts0[i], this$1._scaleFactor, this$1._li);
-	      var isNodeAdded = this$1._pointSnapper.snap(hotPixel, e, i);
-	      if (isNodeAdded) {
-	        e.addIntersection(pts0[i], i);
+
+	    _fieldsArr.forEach(function (field) {
+	      field.tags(_tags);
+	    });
+
+	    selection.call(formFields.fieldsArr(_fieldsArr));
+
+	    if (initial) {
+	      var commentField = selection.select('.form-field-comment textarea');
+	      var commentNode = commentField.node();
+
+	      if (commentNode) {
+	        commentNode.focus();
+	        commentNode.select();
+	      } // trigger a 'blur' event so that comment field can be cleaned
+	      // and checked for hashtags, even if retrieved from localstorage
+
+
+	      utilTriggerEvent(commentField, 'blur');
+	      var osm = context.connection();
+
+	      if (osm) {
+	        osm.userChangesets(function (err, changesets) {
+	          if (err) return;
+	          var comments = changesets.map(function (changeset) {
+	            var comment = changeset.tags.comment;
+	            return comment ? {
+	              title: comment,
+	              value: comment
+	            } : null;
+	          }).filter(Boolean);
+	          commentField.call(commentCombo.data(utilArrayUniqBy(comments, 'title')));
+	        });
 	      }
-	    }
-	  }
-	};
-	MCIndexSnapRounder.prototype.computeNodes = function computeNodes (inputSegmentStrings) {
-	  this._nodedSegStrings = inputSegmentStrings;
-	  this._noder = new MCIndexNoder();
-	  this._pointSnapper = new MCIndexPointSnapper(this._noder.getIndex());
-	  this.snapRound(inputSegmentStrings, this._li);
-	};
-	MCIndexSnapRounder.prototype.computeIntersectionSnaps = function computeIntersectionSnaps (snapPts) {
-	    var this$1 = this;
+	    } // Add warning if comment mentions Google
 
-	  for (var it = snapPts.iterator(); it.hasNext();) {
-	    var snapPt = it.next();
-	    var hotPixel = new HotPixel(snapPt, this$1._scaleFactor, this$1._li);
-	    this$1._pointSnapper.snap(hotPixel);
-	  }
-	};
-	MCIndexSnapRounder.prototype.interfaces_ = function interfaces_ () {
-	  return [Noder]
-	};
-	MCIndexSnapRounder.prototype.getClass = function getClass () {
-	  return MCIndexSnapRounder
-	};
 
-	var BufferOp = function BufferOp () {
-	  this._argGeom = null;
-	  this._distance = null;
-	  this._bufParams = new BufferParameters();
-	  this._resultGeometry = null;
-	  this._saveException = null;
-	  if (arguments.length === 1) {
-	    var g = arguments[0];
-	    this._argGeom = g;
-	  } else if (arguments.length === 2) {
-	    var g$1 = arguments[0];
-	    var bufParams = arguments[1];
-	    this._argGeom = g$1;
-	    this._bufParams = bufParams;
+	    var hasGoogle = _tags.comment.match(/google/i);
+
+	    var commentWarning = selection.select('.form-field-comment').selectAll('.comment-warning').data(hasGoogle ? [0] : []);
+	    commentWarning.exit().transition().duration(200).style('opacity', 0).remove();
+	    var commentEnter = commentWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning comment-warning').style('opacity', 0);
+	    commentEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-alert', 'inline')).attr('href', _t('commit.google_warning_link')).append('span').html(_t.html('commit.google_warning'));
+	    commentEnter.transition().duration(200).style('opacity', 1);
 	  }
-	};
 
-	var staticAccessors$32 = { CAP_ROUND: { configurable: true },CAP_BUTT: { configurable: true },CAP_FLAT: { configurable: true },CAP_SQUARE: { configurable: true },MAX_PRECISION_DIGITS: { configurable: true } };
-	BufferOp.prototype.bufferFixedPrecision = function bufferFixedPrecision (fixedPM) {
-	  var noder = new ScaledNoder(new MCIndexSnapRounder(new PrecisionModel(1.0)), fixedPM.getScale());
-	  var bufBuilder = new BufferBuilder(this._bufParams);
-	  bufBuilder.setWorkingPrecisionModel(fixedPM);
-	  bufBuilder.setNoder(noder);
-	  this._resultGeometry = bufBuilder.buffer(this._argGeom, this._distance);
-	};
-	BufferOp.prototype.bufferReducedPrecision = function bufferReducedPrecision () {
-	    var this$1 = this;
+	  changesetEditor.tags = function (_) {
+	    if (!arguments.length) return _tags;
+	    _tags = _; // Don't reset _fieldsArr here.
 
-	  if (arguments.length === 0) {
-	    for (var precDigits = BufferOp.MAX_PRECISION_DIGITS; precDigits >= 0; precDigits--) {
-	      try {
-	        this$1.bufferReducedPrecision(precDigits);
-	      } catch (ex) {
-	        if (ex instanceof TopologyException) {
-	          this$1._saveException = ex;
-	        } else { throw ex }
-	      } finally {}
-	      if (this$1._resultGeometry !== null) { return null }
-	    }
-	    throw this._saveException
-	  } else if (arguments.length === 1) {
-	    var precisionDigits = arguments[0];
-	    var sizeBasedScaleFactor = BufferOp.precisionScaleFactor(this._argGeom, this._distance, precisionDigits);
-	    var fixedPM = new PrecisionModel(sizeBasedScaleFactor);
-	    this.bufferFixedPrecision(fixedPM);
-	  }
-	};
-	BufferOp.prototype.computeGeometry = function computeGeometry () {
-	  this.bufferOriginalPrecision();
-	  if (this._resultGeometry !== null) { return null }
-	  var argPM = this._argGeom.getFactory().getPrecisionModel();
-	  if (argPM.getType() === PrecisionModel.FIXED) { this.bufferFixedPrecision(argPM); } else { this.bufferReducedPrecision(); }
-	};
-	BufferOp.prototype.setQuadrantSegments = function setQuadrantSegments (quadrantSegments) {
-	  this._bufParams.setQuadrantSegments(quadrantSegments);
-	};
-	BufferOp.prototype.bufferOriginalPrecision = function bufferOriginalPrecision () {
-	  try {
-	    var bufBuilder = new BufferBuilder(this._bufParams);
-	    this._resultGeometry = bufBuilder.buffer(this._argGeom, this._distance);
-	  } catch (ex) {
-	    if (ex instanceof RuntimeException) {
-	      this._saveException = ex;
-	    } else { throw ex }
-	  } finally {}
-	};
-	BufferOp.prototype.getResultGeometry = function getResultGeometry (distance) {
-	  this._distance = distance;
-	  this.computeGeometry();
-	  return this._resultGeometry
-	};
-	BufferOp.prototype.setEndCapStyle = function setEndCapStyle (endCapStyle) {
-	  this._bufParams.setEndCapStyle(endCapStyle);
-	};
-	BufferOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferOp.prototype.getClass = function getClass () {
-	  return BufferOp
-	};
-	BufferOp.bufferOp = function bufferOp () {
-	  if (arguments.length === 2) {
-	    var g = arguments[0];
-	    var distance = arguments[1];
-	    var gBuf = new BufferOp(g);
-	    var geomBuf = gBuf.getResultGeometry(distance);
-	    return geomBuf
-	  } else if (arguments.length === 3) {
-	    if (Number.isInteger(arguments[2]) && (arguments[0] instanceof Geometry && typeof arguments[1] === 'number')) {
-	      var g$1 = arguments[0];
-	      var distance$1 = arguments[1];
-	      var quadrantSegments = arguments[2];
-	      var bufOp = new BufferOp(g$1);
-	      bufOp.setQuadrantSegments(quadrantSegments);
-	      var geomBuf$1 = bufOp.getResultGeometry(distance$1);
-	      return geomBuf$1
-	    } else if (arguments[2] instanceof BufferParameters && (arguments[0] instanceof Geometry && typeof arguments[1] === 'number')) {
-	      var g$2 = arguments[0];
-	      var distance$2 = arguments[1];
-	      var params = arguments[2];
-	      var bufOp$1 = new BufferOp(g$2, params);
-	      var geomBuf$2 = bufOp$1.getResultGeometry(distance$2);
-	      return geomBuf$2
-	    }
-	  } else if (arguments.length === 4) {
-	    var g$3 = arguments[0];
-	    var distance$3 = arguments[1];
-	    var quadrantSegments$1 = arguments[2];
-	    var endCapStyle = arguments[3];
-	    var bufOp$2 = new BufferOp(g$3);
-	    bufOp$2.setQuadrantSegments(quadrantSegments$1);
-	    bufOp$2.setEndCapStyle(endCapStyle);
-	    var geomBuf$3 = bufOp$2.getResultGeometry(distance$3);
-	    return geomBuf$3
-	  }
-	};
-	BufferOp.precisionScaleFactor = function precisionScaleFactor (g, distance, maxPrecisionDigits) {
-	  var env = g.getEnvelopeInternal();
-	  var envMax = MathUtil.max(Math.abs(env.getMaxX()), Math.abs(env.getMaxY()), Math.abs(env.getMinX()), Math.abs(env.getMinY()));
-	  var expandByDistance = distance > 0.0 ? distance : 0.0;
-	  var bufEnvMax = envMax + 2 * expandByDistance;
-	  var bufEnvPrecisionDigits = Math.trunc(Math.log(bufEnvMax) / Math.log(10) + 1.0);
-	  var minUnitLog10 = maxPrecisionDigits - bufEnvPrecisionDigits;
-	  var scaleFactor = Math.pow(10.0, minUnitLog10);
-	  return scaleFactor
-	};
-	staticAccessors$32.CAP_ROUND.get = function () { return BufferParameters.CAP_ROUND };
-	staticAccessors$32.CAP_BUTT.get = function () { return BufferParameters.CAP_FLAT };
-	staticAccessors$32.CAP_FLAT.get = function () { return BufferParameters.CAP_FLAT };
-	staticAccessors$32.CAP_SQUARE.get = function () { return BufferParameters.CAP_SQUARE };
-	staticAccessors$32.MAX_PRECISION_DIGITS.get = function () { return 12 };
-
-	Object.defineProperties( BufferOp, staticAccessors$32 );
-
-	var PointPairDistance = function PointPairDistance () {
-	  this._pt = [new Coordinate(), new Coordinate()];
-	  this._distance = Double.NaN;
-	  this._isNull = true;
-	};
-	PointPairDistance.prototype.getCoordinates = function getCoordinates () {
-	  return this._pt
-	};
-	PointPairDistance.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pt[i]
-	};
-	PointPairDistance.prototype.setMinimum = function setMinimum () {
-	  if (arguments.length === 1) {
-	    var ptDist = arguments[0];
-	    this.setMinimum(ptDist._pt[0], ptDist._pt[1]);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (this._isNull) {
-	      this.initialize(p0, p1);
-	      return null
-	    }
-	    var dist = p0.distance(p1);
-	    if (dist < this._distance) { this.initialize(p0, p1, dist); }
-	  }
-	};
-	PointPairDistance.prototype.initialize = function initialize () {
-	  if (arguments.length === 0) {
-	    this._isNull = true;
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    this._pt[0].setCoordinate(p0);
-	    this._pt[1].setCoordinate(p1);
-	    this._distance = p0.distance(p1);
-	    this._isNull = false;
-	  } else if (arguments.length === 3) {
-	    var p0$1 = arguments[0];
-	    var p1$1 = arguments[1];
-	    var distance = arguments[2];
-	    this._pt[0].setCoordinate(p0$1);
-	    this._pt[1].setCoordinate(p1$1);
-	    this._distance = distance;
-	    this._isNull = false;
-	  }
-	};
-	PointPairDistance.prototype.getDistance = function getDistance () {
-	  return this._distance
-	};
-	PointPairDistance.prototype.setMaximum = function setMaximum () {
-	  if (arguments.length === 1) {
-	    var ptDist = arguments[0];
-	    this.setMaximum(ptDist._pt[0], ptDist._pt[1]);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (this._isNull) {
-	      this.initialize(p0, p1);
-	      return null
-	    }
-	    var dist = p0.distance(p1);
-	    if (dist > this._distance) { this.initialize(p0, p1, dist); }
-	  }
-	};
-	PointPairDistance.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointPairDistance.prototype.getClass = function getClass () {
-	  return PointPairDistance
-	};
+	    return changesetEditor;
+	  };
 
-	var DistanceToPointFinder = function DistanceToPointFinder () {};
+	  changesetEditor.changesetID = function (_) {
+	    if (!arguments.length) return _changesetID;
+	    if (_changesetID === _) return changesetEditor;
+	    _changesetID = _;
+	    _fieldsArr = null;
+	    return changesetEditor;
+	  };
 
-	DistanceToPointFinder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	DistanceToPointFinder.prototype.getClass = function getClass () {
-	  return DistanceToPointFinder
-	};
-	DistanceToPointFinder.computeDistance = function computeDistance () {
-	  if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof LineString && arguments[1] instanceof Coordinate)) {
-	    var line = arguments[0];
-	    var pt = arguments[1];
-	    var ptDist = arguments[2];
-	    var coords = line.getCoordinates();
-	    var tempSegment = new LineSegment();
-	    for (var i = 0; i < coords.length - 1; i++) {
-	      tempSegment.setCoordinates(coords[i], coords[i + 1]);
-	      var closestPt = tempSegment.closestPoint(pt);
-	      ptDist.setMinimum(closestPt, pt);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof Polygon && arguments[1] instanceof Coordinate)) {
-	    var poly = arguments[0];
-	    var pt$1 = arguments[1];
-	    var ptDist$1 = arguments[2];
-	    DistanceToPointFinder.computeDistance(poly.getExteriorRing(), pt$1, ptDist$1);
-	    for (var i$1 = 0; i$1 < poly.getNumInteriorRing(); i$1++) {
-	      DistanceToPointFinder.computeDistance(poly.getInteriorRingN(i$1), pt$1, ptDist$1);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof Geometry && arguments[1] instanceof Coordinate)) {
-	    var geom = arguments[0];
-	    var pt$2 = arguments[1];
-	    var ptDist$2 = arguments[2];
-	    if (geom instanceof LineString) {
-	      DistanceToPointFinder.computeDistance(geom, pt$2, ptDist$2);
-	    } else if (geom instanceof Polygon) {
-	      DistanceToPointFinder.computeDistance(geom, pt$2, ptDist$2);
-	    } else if (geom instanceof GeometryCollection) {
-	      var gc = geom;
-	      for (var i$2 = 0; i$2 < gc.getNumGeometries(); i$2++) {
-	        var g = gc.getGeometryN(i$2);
-	        DistanceToPointFinder.computeDistance(g, pt$2, ptDist$2);
-	      }
-	    } else {
-	      ptDist$2.setMinimum(geom.getCoordinate(), pt$2);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof LineSegment && arguments[1] instanceof Coordinate)) {
-	    var segment = arguments[0];
-	    var pt$3 = arguments[1];
-	    var ptDist$3 = arguments[2];
-	    var closestPt$1 = segment.closestPoint(pt$3);
-	    ptDist$3.setMinimum(closestPt$1, pt$3);
-	  }
-	};
+	  return utilRebind(changesetEditor, dispatch$1, 'on');
+	}
 
-	var BufferCurveMaximumDistanceFinder = function BufferCurveMaximumDistanceFinder (inputGeom) {
-	  this._maxPtDist = new PointPairDistance();
-	  this._inputGeom = inputGeom || null;
-	};
+	function uiSectionChanges(context) {
+	  var detected = utilDetect();
+	  var _discardTags = {};
+	  _mainFileFetcher.get('discarded').then(function (d) {
+	    _discardTags = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  var section = uiSection('changes-list', context).label(function () {
+	    var history = context.history();
+	    var summary = history.difference().summary();
+	    return _t('inspector.title_count', {
+	      title: _t.html('commit.changes'),
+	      count: summary.length
+	    });
+	  }).disclosureContent(renderDisclosureContent);
 
-	var staticAccessors$36 = { MaxPointDistanceFilter: { configurable: true },MaxMidpointDistanceFilter: { configurable: true } };
-	BufferCurveMaximumDistanceFinder.prototype.computeMaxMidpointDistance = function computeMaxMidpointDistance (curve) {
-	  var distFilter = new MaxMidpointDistanceFilter(this._inputGeom);
-	  curve.apply(distFilter);
-	  this._maxPtDist.setMaximum(distFilter.getMaxPointDistance());
-	};
-	BufferCurveMaximumDistanceFinder.prototype.computeMaxVertexDistance = function computeMaxVertexDistance (curve) {
-	  var distFilter = new MaxPointDistanceFilter(this._inputGeom);
-	  curve.apply(distFilter);
-	  this._maxPtDist.setMaximum(distFilter.getMaxPointDistance());
-	};
-	BufferCurveMaximumDistanceFinder.prototype.findDistance = function findDistance (bufferCurve) {
-	  this.computeMaxVertexDistance(bufferCurve);
-	  this.computeMaxMidpointDistance(bufferCurve);
-	  return this._maxPtDist.getDistance()
-	};
-	BufferCurveMaximumDistanceFinder.prototype.getDistancePoints = function getDistancePoints () {
-	  return this._maxPtDist
-	};
-	BufferCurveMaximumDistanceFinder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferCurveMaximumDistanceFinder.prototype.getClass = function getClass () {
-	  return BufferCurveMaximumDistanceFinder
-	};
-	staticAccessors$36.MaxPointDistanceFilter.get = function () { return MaxPointDistanceFilter };
-	staticAccessors$36.MaxMidpointDistanceFilter.get = function () { return MaxMidpointDistanceFilter };
+	  function renderDisclosureContent(selection) {
+	    var history = context.history();
+	    var summary = history.difference().summary();
+	    var container = selection.selectAll('.commit-section').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'commit-section');
+	    containerEnter.append('ul').attr('class', 'changeset-list');
+	    container = containerEnter.merge(container);
+	    var items = container.select('ul').selectAll('li').data(summary);
+	    var itemsEnter = items.enter().append('li').attr('class', 'change-item');
+	    var buttons = itemsEnter.append('button').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
+	    buttons.each(function (d) {
+	      select(this).call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
+	    });
+	    buttons.append('span').attr('class', 'change-type').html(function (d) {
+	      return _t.html('commit.' + d.changeType) + ' ';
+	    });
+	    buttons.append('strong').attr('class', 'entity-type').html(function (d) {
+	      var matched = _mainPresetIndex.match(d.entity, d.graph);
+	      return matched && matched.name() || utilDisplayType(d.entity.id);
+	    });
+	    buttons.append('span').attr('class', 'entity-name').html(function (d) {
+	      var name = utilDisplayName(d.entity) || '',
+	          string = '';
 
-	Object.defineProperties( BufferCurveMaximumDistanceFinder, staticAccessors$36 );
+	      if (name !== '') {
+	        string += ':';
+	      }
 
-	var MaxPointDistanceFilter = function MaxPointDistanceFilter (geom) {
-	  this._maxPtDist = new PointPairDistance();
-	  this._minPtDist = new PointPairDistance();
-	  this._geom = geom || null;
-	};
-	MaxPointDistanceFilter.prototype.filter = function filter (pt) {
-	  this._minPtDist.initialize();
-	  DistanceToPointFinder.computeDistance(this._geom, pt, this._minPtDist);
-	  this._maxPtDist.setMaximum(this._minPtDist);
-	};
-	MaxPointDistanceFilter.prototype.getMaxPointDistance = function getMaxPointDistance () {
-	  return this._maxPtDist
-	};
-	MaxPointDistanceFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateFilter]
-	};
-	MaxPointDistanceFilter.prototype.getClass = function getClass () {
-	  return MaxPointDistanceFilter
-	};
+	      return string += ' ' + name;
+	    });
+	    items = itemsEnter.merge(items); // Download changeset link
 
-	var MaxMidpointDistanceFilter = function MaxMidpointDistanceFilter (geom) {
-	  this._maxPtDist = new PointPairDistance();
-	  this._minPtDist = new PointPairDistance();
-	  this._geom = geom || null;
-	};
-	MaxMidpointDistanceFilter.prototype.filter = function filter (seq, index) {
-	  if (index === 0) { return null }
-	  var p0 = seq.getCoordinate(index - 1);
-	  var p1 = seq.getCoordinate(index);
-	  var midPt = new Coordinate((p0.x + p1.x) / 2, (p0.y + p1.y) / 2);
-	  this._minPtDist.initialize();
-	  DistanceToPointFinder.computeDistance(this._geom, midPt, this._minPtDist);
-	  this._maxPtDist.setMaximum(this._minPtDist);
-	};
-	MaxMidpointDistanceFilter.prototype.isDone = function isDone () {
-	  return false
-	};
-	MaxMidpointDistanceFilter.prototype.isGeometryChanged = function isGeometryChanged () {
-	  return false
-	};
-	MaxMidpointDistanceFilter.prototype.getMaxPointDistance = function getMaxPointDistance () {
-	  return this._maxPtDist
-	};
-	MaxMidpointDistanceFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequenceFilter]
-	};
-	MaxMidpointDistanceFilter.prototype.getClass = function getClass () {
-	  return MaxMidpointDistanceFilter
-	};
+	    var changeset = new osmChangeset().update({
+	      id: undefined
+	    });
+	    var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	    delete changeset.id; // Export without chnageset_id
 
-	var PolygonExtracter = function PolygonExtracter (comps) {
-	  this._comps = comps || null;
-	};
-	PolygonExtracter.prototype.filter = function filter (geom) {
-	  if (geom instanceof Polygon) { this._comps.add(geom); }
-	};
-	PolygonExtracter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryFilter]
-	};
-	PolygonExtracter.prototype.getClass = function getClass () {
-	  return PolygonExtracter
-	};
-	PolygonExtracter.getPolygons = function getPolygons () {
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    return PolygonExtracter.getPolygons(geom, new ArrayList())
-	  } else if (arguments.length === 2) {
-	    var geom$1 = arguments[0];
-	    var list = arguments[1];
-	    if (geom$1 instanceof Polygon) {
-	      list.add(geom$1);
-	    } else if (geom$1 instanceof GeometryCollection) {
-	      geom$1.apply(new PolygonExtracter(list));
-	    }
-	    return list
-	  }
-	};
+	    var data = JXON.stringify(changeset.osmChangeJXON(changes));
+	    var blob = new Blob([data], {
+	      type: 'text/xml;charset=utf-8;'
+	    });
+	    var fileName = 'changes.osc';
+	    var linkEnter = container.selectAll('.download-changes').data([0]).enter().append('a').attr('class', 'download-changes');
 
-	var LinearComponentExtracter = function LinearComponentExtracter () {
-	  this._lines = null;
-	  this._isForcedToLineString = false;
-	  if (arguments.length === 1) {
-	    var lines = arguments[0];
-	    this._lines = lines;
-	  } else if (arguments.length === 2) {
-	    var lines$1 = arguments[0];
-	    var isForcedToLineString = arguments[1];
-	    this._lines = lines$1;
-	    this._isForcedToLineString = isForcedToLineString;
-	  }
-	};
-	LinearComponentExtracter.prototype.filter = function filter (geom) {
-	  if (this._isForcedToLineString && geom instanceof LinearRing) {
-	    var line = geom.getFactory().createLineString(geom.getCoordinateSequence());
-	    this._lines.add(line);
-	    return null
-	  }
-	  if (geom instanceof LineString) { this._lines.add(geom); }
-	};
-	LinearComponentExtracter.prototype.setForceToLineString = function setForceToLineString (isForcedToLineString) {
-	  this._isForcedToLineString = isForcedToLineString;
-	};
-	LinearComponentExtracter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryComponentFilter]
-	};
-	LinearComponentExtracter.prototype.getClass = function getClass () {
-	  return LinearComponentExtracter
-	};
-	LinearComponentExtracter.getGeometry = function getGeometry () {
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    return geom.getFactory().buildGeometry(LinearComponentExtracter.getLines(geom))
-	  } else if (arguments.length === 2) {
-	    var geom$1 = arguments[0];
-	    var forceToLineString = arguments[1];
-	    return geom$1.getFactory().buildGeometry(LinearComponentExtracter.getLines(geom$1, forceToLineString))
-	  }
-	};
-	LinearComponentExtracter.getLines = function getLines () {
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    return LinearComponentExtracter.getLines(geom, false)
-	  } else if (arguments.length === 2) {
-	    if (hasInterface(arguments[0], Collection) && hasInterface(arguments[1], Collection)) {
-	      var geoms = arguments[0];
-	      var lines$1 = arguments[1];
-	      for (var i = geoms.iterator(); i.hasNext();) {
-	        var g = i.next();
-	        LinearComponentExtracter.getLines(g, lines$1);
-	      }
-	      return lines$1
-	    } else if (arguments[0] instanceof Geometry && typeof arguments[1] === 'boolean') {
-	      var geom$1 = arguments[0];
-	      var forceToLineString = arguments[1];
-	      var lines = new ArrayList();
-	      geom$1.apply(new LinearComponentExtracter(lines, forceToLineString));
-	      return lines
-	    } else if (arguments[0] instanceof Geometry && hasInterface(arguments[1], Collection)) {
-	      var geom$2 = arguments[0];
-	      var lines$2 = arguments[1];
-	      if (geom$2 instanceof LineString) {
-	        lines$2.add(geom$2);
-	      } else {
-	        geom$2.apply(new LinearComponentExtracter(lines$2));
+	    if (detected.download) {
+	      // All except IE11 and Edge
+	      linkEnter // download the data as a file
+	      .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
+	    } else {
+	      // IE11 and Edge
+	      linkEnter // open data uri in a new tab
+	      .attr('target', '_blank').on('click.download', function () {
+	        navigator.msSaveBlob(blob, fileName);
+	      });
+	    }
+
+	    linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('commit.download_changes'));
+
+	    function mouseover(d) {
+	      if (d.entity) {
+	        context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
 	      }
-	      return lines$2
 	    }
-	  } else if (arguments.length === 3) {
-	    if (typeof arguments[2] === 'boolean' && (hasInterface(arguments[0], Collection) && hasInterface(arguments[1], Collection))) {
-	      var geoms$1 = arguments[0];
-	      var lines$3 = arguments[1];
-	      var forceToLineString$1 = arguments[2];
-	      for (var i$1 = geoms$1.iterator(); i$1.hasNext();) {
-	        var g$1 = i$1.next();
-	        LinearComponentExtracter.getLines(g$1, lines$3, forceToLineString$1);
+
+	    function mouseout() {
+	      context.surface().selectAll('.hover').classed('hover', false);
+	    }
+
+	    function click(d3_event, change) {
+	      if (change.changeType !== 'deleted') {
+	        var entity = change.entity;
+	        context.map().zoomToEase(entity);
+	        context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
 	      }
-	      return lines$3
-	    } else if (typeof arguments[2] === 'boolean' && (arguments[0] instanceof Geometry && hasInterface(arguments[1], Collection))) {
-	      var geom$3 = arguments[0];
-	      var lines$4 = arguments[1];
-	      var forceToLineString$2 = arguments[2];
-	      geom$3.apply(new LinearComponentExtracter(lines$4, forceToLineString$2));
-	      return lines$4
 	    }
 	  }
-	};
 
-	var PointLocator = function PointLocator () {
-	  this._boundaryRule = BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE;
-	  this._isIn = null;
-	  this._numBoundaries = null;
-	  if (arguments.length === 0) ; else if (arguments.length === 1) {
-	    var boundaryRule = arguments[0];
-	    if (boundaryRule === null) { throw new IllegalArgumentException('Rule must be non-null') }
-	    this._boundaryRule = boundaryRule;
-	  }
-	};
-	PointLocator.prototype.locateInternal = function locateInternal () {
-	    var this$1 = this;
-
-	  if (arguments[0] instanceof Coordinate && arguments[1] instanceof Polygon) {
-	    var p = arguments[0];
-	    var poly = arguments[1];
-	    if (poly.isEmpty()) { return Location.EXTERIOR }
-	    var shell = poly.getExteriorRing();
-	    var shellLoc = this.locateInPolygonRing(p, shell);
-	    if (shellLoc === Location.EXTERIOR) { return Location.EXTERIOR }
-	    if (shellLoc === Location.BOUNDARY) { return Location.BOUNDARY }
-	    for (var i = 0; i < poly.getNumInteriorRing(); i++) {
-	      var hole = poly.getInteriorRingN(i);
-	      var holeLoc = this$1.locateInPolygonRing(p, hole);
-	      if (holeLoc === Location.INTERIOR) { return Location.EXTERIOR }
-	      if (holeLoc === Location.BOUNDARY) { return Location.BOUNDARY }
-	    }
-	    return Location.INTERIOR
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof LineString) {
-	    var p$1 = arguments[0];
-	    var l = arguments[1];
-	    if (!l.getEnvelopeInternal().intersects(p$1)) { return Location.EXTERIOR }
-	    var pt = l.getCoordinates();
-	    if (!l.isClosed()) {
-	      if (p$1.equals(pt[0]) || p$1.equals(pt[pt.length - 1])) {
-	        return Location.BOUNDARY
-	      }
-	    }
-	    if (CGAlgorithms.isOnLine(p$1, pt)) { return Location.INTERIOR }
-	    return Location.EXTERIOR
-	  } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Point$1) {
-	    var p$2 = arguments[0];
-	    var pt$1 = arguments[1];
-	    var ptCoord = pt$1.getCoordinate();
-	    if (ptCoord.equals2D(p$2)) { return Location.INTERIOR }
-	    return Location.EXTERIOR
-	  }
-	};
-	PointLocator.prototype.locateInPolygonRing = function locateInPolygonRing (p, ring) {
-	  if (!ring.getEnvelopeInternal().intersects(p)) { return Location.EXTERIOR }
-	  return CGAlgorithms.locatePointInRing(p, ring.getCoordinates())
-	};
-	PointLocator.prototype.intersects = function intersects (p, geom) {
-	  return this.locate(p, geom) !== Location.EXTERIOR
-	};
-	PointLocator.prototype.updateLocationInfo = function updateLocationInfo (loc) {
-	  if (loc === Location.INTERIOR) { this._isIn = true; }
-	  if (loc === Location.BOUNDARY) { this._numBoundaries++; }
-	};
-	PointLocator.prototype.computeLocation = function computeLocation (p, geom) {
-	    var this$1 = this;
-
-	  if (geom instanceof Point$1) {
-	    this.updateLocationInfo(this.locateInternal(p, geom));
-	  }
-	  if (geom instanceof LineString) {
-	    this.updateLocationInfo(this.locateInternal(p, geom));
-	  } else if (geom instanceof Polygon) {
-	    this.updateLocationInfo(this.locateInternal(p, geom));
-	  } else if (geom instanceof MultiLineString) {
-	    var ml = geom;
-	    for (var i = 0; i < ml.getNumGeometries(); i++) {
-	      var l = ml.getGeometryN(i);
-	      this$1.updateLocationInfo(this$1.locateInternal(p, l));
-	    }
-	  } else if (geom instanceof MultiPolygon) {
-	    var mpoly = geom;
-	    for (var i$1 = 0; i$1 < mpoly.getNumGeometries(); i$1++) {
-	      var poly = mpoly.getGeometryN(i$1);
-	      this$1.updateLocationInfo(this$1.locateInternal(p, poly));
-	    }
-	  } else if (geom instanceof GeometryCollection) {
-	    var geomi = new GeometryCollectionIterator(geom);
-	    while (geomi.hasNext()) {
-	      var g2 = geomi.next();
-	      if (g2 !== geom) { this$1.computeLocation(p, g2); }
+	  return section;
+	}
+
+	function uiCommitWarnings(context) {
+	  function commitWarnings(selection) {
+	    var issuesBySeverity = context.validator().getIssuesBySeverity({
+	      what: 'edited',
+	      where: 'all',
+	      includeDisabledRules: true
+	    });
+
+	    for (var severity in issuesBySeverity) {
+	      var issues = issuesBySeverity[severity];
+	      var section = severity + '-section';
+	      var issueItem = severity + '-item';
+	      var container = selection.selectAll('.' + section).data(issues.length ? [0] : []);
+	      container.exit().remove();
+	      var containerEnter = container.enter().append('div').attr('class', 'modal-section ' + section + ' fillL2');
+	      containerEnter.append('h3').html(severity === 'warning' ? _t.html('commit.warnings') : _t.html('commit.errors'));
+	      containerEnter.append('ul').attr('class', 'changeset-list');
+	      container = containerEnter.merge(container);
+	      var items = container.select('ul').selectAll('li').data(issues, function (d) {
+	        return d.id;
+	      });
+	      items.exit().remove();
+	      var itemsEnter = items.enter().append('li').attr('class', issueItem);
+	      var buttons = itemsEnter.append('button').on('mouseover', function (d3_event, d) {
+	        if (d.entityIds) {
+	          context.surface().selectAll(utilEntityOrMemberSelector(d.entityIds, context.graph())).classed('hover', true);
+	        }
+	      }).on('mouseout', function () {
+	        context.surface().selectAll('.hover').classed('hover', false);
+	      }).on('click', function (d3_event, d) {
+	        context.validator().focusIssue(d);
+	      });
+	      buttons.call(svgIcon('#iD-icon-alert', 'pre-text'));
+	      buttons.append('strong').attr('class', 'issue-message');
+	      buttons.filter(function (d) {
+	        return d.tooltip;
+	      }).call(uiTooltip().title(function (d) {
+	        return d.tooltip;
+	      }).placement('top'));
+	      items = itemsEnter.merge(items);
+	      items.selectAll('.issue-message').html(function (d) {
+	        return d.message(context);
+	      });
 	    }
 	  }
-	};
-	PointLocator.prototype.locate = function locate (p, geom) {
-	  if (geom.isEmpty()) { return Location.EXTERIOR }
-	  if (geom instanceof LineString) {
-	    return this.locateInternal(p, geom)
-	  } else if (geom instanceof Polygon) {
-	    return this.locateInternal(p, geom)
-	  }
-	  this._isIn = false;
-	  this._numBoundaries = 0;
-	  this.computeLocation(p, geom);
-	  if (this._boundaryRule.isInBoundary(this._numBoundaries)) { return Location.BOUNDARY }
-	  if (this._numBoundaries > 0 || this._isIn) { return Location.INTERIOR }
-	  return Location.EXTERIOR
-	};
-	PointLocator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointLocator.prototype.getClass = function getClass () {
-	  return PointLocator
-	};
 
-	var GeometryLocation = function GeometryLocation () {
-	  this._component = null;
-	  this._segIndex = null;
-	  this._pt = null;
-	  if (arguments.length === 2) {
-	    var component = arguments[0];
-	    var pt = arguments[1];
-	    GeometryLocation.call(this, component, GeometryLocation.INSIDE_AREA, pt);
-	  } else if (arguments.length === 3) {
-	    var component$1 = arguments[0];
-	    var segIndex = arguments[1];
-	    var pt$1 = arguments[2];
-	    this._component = component$1;
-	    this._segIndex = segIndex;
-	    this._pt = pt$1;
+	  return commitWarnings;
+	}
+
+	var readOnlyTags = [/^changesets_count$/, /^created_by$/, /^ideditor:/, /^imagery_used$/, /^host$/, /^locale$/, /^warnings:/, /^resolved:/, /^closed:note$/, /^closed:keepright$/, /^closed:improveosm:/, /^closed:osmose:/]; // treat most punctuation (except -, _, +, &) as hashtag delimiters - #4398
+	// from https://stackoverflow.com/a/25575009
+
+	var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
+	function uiCommit(context) {
+	  var dispatch$1 = dispatch('cancel');
+
+	  var _userDetails;
+
+	  var _selection;
+
+	  var changesetEditor = uiChangesetEditor(context).on('change', changeTags);
+	  var rawTagEditor = uiSectionRawTagEditor('changeset-tag-editor', context).on('change', changeTags).readOnlyTags(readOnlyTags);
+	  var commitChanges = uiSectionChanges(context);
+	  var commitWarnings = uiCommitWarnings(context);
+
+	  function commit(selection) {
+	    _selection = selection; // Initialize changeset if one does not exist yet.
+
+	    if (!context.changeset) initChangeset();
+	    loadDerivedChangesetTags();
+	    selection.call(render);
 	  }
-	};
 
-	var staticAccessors$38 = { INSIDE_AREA: { configurable: true } };
-	GeometryLocation.prototype.isInsideArea = function isInsideArea () {
-	  return this._segIndex === GeometryLocation.INSIDE_AREA
-	};
-	GeometryLocation.prototype.getCoordinate = function getCoordinate () {
-	  return this._pt
-	};
-	GeometryLocation.prototype.getGeometryComponent = function getGeometryComponent () {
-	  return this._component
-	};
-	GeometryLocation.prototype.getSegmentIndex = function getSegmentIndex () {
-	  return this._segIndex
-	};
-	GeometryLocation.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryLocation.prototype.getClass = function getClass () {
-	  return GeometryLocation
-	};
-	staticAccessors$38.INSIDE_AREA.get = function () { return -1 };
+	  function initChangeset() {
+	    // expire stored comment, hashtags, source after cutoff datetime - #3947 #4899
+	    var commentDate = +corePreferences('commentDate') || 0;
+	    var currDate = Date.now();
+	    var cutoff = 2 * 86400 * 1000; // 2 days
 
-	Object.defineProperties( GeometryLocation, staticAccessors$38 );
+	    if (commentDate > currDate || currDate - commentDate > cutoff) {
+	      corePreferences('comment', null);
+	      corePreferences('hashtags', null);
+	      corePreferences('source', null);
+	    } // load in explicitly-set values, if any
 
-	var PointExtracter = function PointExtracter (pts) {
-	  this._pts = pts || null;
-	};
-	PointExtracter.prototype.filter = function filter (geom) {
-	  if (geom instanceof Point$1) { this._pts.add(geom); }
-	};
-	PointExtracter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryFilter]
-	};
-	PointExtracter.prototype.getClass = function getClass () {
-	  return PointExtracter
-	};
-	PointExtracter.getPoints = function getPoints () {
-	  if (arguments.length === 1) {
-	    var geom = arguments[0];
-	    if (geom instanceof Point$1) {
-	      return Collections.singletonList(geom)
+
+	    if (context.defaultChangesetComment()) {
+	      corePreferences('comment', context.defaultChangesetComment());
+	      corePreferences('commentDate', Date.now());
+	    }
+
+	    if (context.defaultChangesetSource()) {
+	      corePreferences('source', context.defaultChangesetSource());
+	      corePreferences('commentDate', Date.now());
 	    }
-	    return PointExtracter.getPoints(geom, new ArrayList())
-	  } else if (arguments.length === 2) {
-	    var geom$1 = arguments[0];
-	    var list = arguments[1];
-	    if (geom$1 instanceof Point$1) {
-	      list.add(geom$1);
-	    } else if (geom$1 instanceof GeometryCollection) {
-	      geom$1.apply(new PointExtracter(list));
+
+	    if (context.defaultChangesetHashtags()) {
+	      corePreferences('hashtags', context.defaultChangesetHashtags());
+	      corePreferences('commentDate', Date.now());
 	    }
-	    return list
-	  }
-	};
 
-	var ConnectedElementLocationFilter = function ConnectedElementLocationFilter () {
-	  this._locations = null;
-	  var locations = arguments[0];
-	  this._locations = locations;
-	};
-	ConnectedElementLocationFilter.prototype.filter = function filter (geom) {
-	  if (geom instanceof Point$1 || geom instanceof LineString || geom instanceof Polygon) { this._locations.add(new GeometryLocation(geom, 0, geom.getCoordinate())); }
-	};
-	ConnectedElementLocationFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryFilter]
-	};
-	ConnectedElementLocationFilter.prototype.getClass = function getClass () {
-	  return ConnectedElementLocationFilter
-	};
-	ConnectedElementLocationFilter.getLocations = function getLocations (geom) {
-	  var locations = new ArrayList();
-	  geom.apply(new ConnectedElementLocationFilter(locations));
-	  return locations
-	};
+	    var detected = utilDetect();
+	    var tags = {
+	      comment: corePreferences('comment') || '',
+	      created_by: context.cleanTagValue('iD ' + context.version),
+	      host: context.cleanTagValue(detected.host),
+	      locale: context.cleanTagValue(_mainLocalizer.localeCode())
+	    }; // call findHashtags initially - this will remove stored
+	    // hashtags if any hashtags are found in the comment - #4304
 
-	var DistanceOp = function DistanceOp () {
-	  this._geom = null;
-	  this._terminateDistance = 0.0;
-	  this._ptLocator = new PointLocator();
-	  this._minDistanceLocation = null;
-	  this._minDistance = Double.MAX_VALUE;
-	  if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    this._geom = [g0, g1];
-	    this._terminateDistance = 0.0;
-	  } else if (arguments.length === 3) {
-	    var g0$1 = arguments[0];
-	    var g1$1 = arguments[1];
-	    var terminateDistance = arguments[2];
-	    this._geom = new Array(2).fill(null);
-	    this._geom[0] = g0$1;
-	    this._geom[1] = g1$1;
-	    this._terminateDistance = terminateDistance;
-	  }
-	};
-	DistanceOp.prototype.computeContainmentDistance = function computeContainmentDistance () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    var locPtPoly = new Array(2).fill(null);
-	    this.computeContainmentDistance(0, locPtPoly);
-	    if (this._minDistance <= this._terminateDistance) { return null }
-	    this.computeContainmentDistance(1, locPtPoly);
-	  } else if (arguments.length === 2) {
-	    var polyGeomIndex = arguments[0];
-	    var locPtPoly$1 = arguments[1];
-	    var locationsIndex = 1 - polyGeomIndex;
-	    var polys = PolygonExtracter.getPolygons(this._geom[polyGeomIndex]);
-	    if (polys.size() > 0) {
-	      var insideLocs = ConnectedElementLocationFilter.getLocations(this._geom[locationsIndex]);
-	      this.computeContainmentDistance(insideLocs, polys, locPtPoly$1);
-	      if (this._minDistance <= this._terminateDistance) {
-	        this._minDistanceLocation[locationsIndex] = locPtPoly$1[0];
-	        this._minDistanceLocation[polyGeomIndex] = locPtPoly$1[1];
-	        return null
-	      }
-	    }
-	  } else if (arguments.length === 3) {
-	    if (arguments[2] instanceof Array && (hasInterface(arguments[0], List) && hasInterface(arguments[1], List))) {
-	      var locs = arguments[0];
-	      var polys$1 = arguments[1];
-	      var locPtPoly$2 = arguments[2];
-	      for (var i = 0; i < locs.size(); i++) {
-	        var loc = locs.get(i);
-	        for (var j = 0; j < polys$1.size(); j++) {
-	          this$1.computeContainmentDistance(loc, polys$1.get(j), locPtPoly$2);
-	          if (this$1._minDistance <= this$1._terminateDistance) { return null }
-	        }
-	      }
-	    } else if (arguments[2] instanceof Array && (arguments[0] instanceof GeometryLocation && arguments[1] instanceof Polygon)) {
-	      var ptLoc = arguments[0];
-	      var poly = arguments[1];
-	      var locPtPoly$3 = arguments[2];
-	      var pt = ptLoc.getCoordinate();
-	      if (Location.EXTERIOR !== this._ptLocator.locate(pt, poly)) {
-	        this._minDistance = 0.0;
-	        locPtPoly$3[0] = ptLoc;
-	        locPtPoly$3[1] = new GeometryLocation(poly, pt);
-
-	        return null
-	      }
+	    findHashtags(tags, true);
+	    var hashtags = corePreferences('hashtags');
+
+	    if (hashtags) {
+	      tags.hashtags = hashtags;
 	    }
-	  }
-	};
-	DistanceOp.prototype.computeMinDistanceLinesPoints = function computeMinDistanceLinesPoints (lines, points, locGeom) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < lines.size(); i++) {
-	    var line = lines.get(i);
-	    for (var j = 0; j < points.size(); j++) {
-	      var pt = points.get(j);
-	      this$1.computeMinDistance(line, pt, locGeom);
-	      if (this$1._minDistance <= this$1._terminateDistance) { return null }
+	    var source = corePreferences('source');
+
+	    if (source) {
+	      tags.source = source;
 	    }
-	  }
-	};
-	DistanceOp.prototype.computeFacetDistance = function computeFacetDistance () {
-	  var locGeom = new Array(2).fill(null);
-	  var lines0 = LinearComponentExtracter.getLines(this._geom[0]);
-	  var lines1 = LinearComponentExtracter.getLines(this._geom[1]);
-	  var pts0 = PointExtracter.getPoints(this._geom[0]);
-	  var pts1 = PointExtracter.getPoints(this._geom[1]);
-	  this.computeMinDistanceLines(lines0, lines1, locGeom);
-	  this.updateMinDistance(locGeom, false);
-	  if (this._minDistance <= this._terminateDistance) { return null }
-	  locGeom[0] = null;
-	  locGeom[1] = null;
-	  this.computeMinDistanceLinesPoints(lines0, pts1, locGeom);
-	  this.updateMinDistance(locGeom, false);
-	  if (this._minDistance <= this._terminateDistance) { return null }
-	  locGeom[0] = null;
-	  locGeom[1] = null;
-	  this.computeMinDistanceLinesPoints(lines1, pts0, locGeom);
-	  this.updateMinDistance(locGeom, true);
-	  if (this._minDistance <= this._terminateDistance) { return null }
-	  locGeom[0] = null;
-	  locGeom[1] = null;
-	  this.computeMinDistancePoints(pts0, pts1, locGeom);
-	  this.updateMinDistance(locGeom, false);
-	};
-	DistanceOp.prototype.nearestLocations = function nearestLocations () {
-	  this.computeMinDistance();
-	  return this._minDistanceLocation
-	};
-	DistanceOp.prototype.updateMinDistance = function updateMinDistance (locGeom, flip) {
-	  if (locGeom[0] === null) { return null }
-	  if (flip) {
-	    this._minDistanceLocation[0] = locGeom[1];
-	    this._minDistanceLocation[1] = locGeom[0];
-	  } else {
-	    this._minDistanceLocation[0] = locGeom[0];
-	    this._minDistanceLocation[1] = locGeom[1];
-	  }
-	};
-	DistanceOp.prototype.nearestPoints = function nearestPoints () {
-	  this.computeMinDistance();
-	  var nearestPts = [this._minDistanceLocation[0].getCoordinate(), this._minDistanceLocation[1].getCoordinate()];
-	  return nearestPts
-	};
-	DistanceOp.prototype.computeMinDistance = function computeMinDistance () {
-	    var this$1 = this;
-
-	  if (arguments.length === 0) {
-	    if (this._minDistanceLocation !== null) { return null }
-	    this._minDistanceLocation = new Array(2).fill(null);
-	    this.computeContainmentDistance();
-	    if (this._minDistance <= this._terminateDistance) { return null }
-	    this.computeFacetDistance();
-	  } else if (arguments.length === 3) {
-	    if (arguments[2] instanceof Array && (arguments[0] instanceof LineString && arguments[1] instanceof Point$1)) {
-	      var line = arguments[0];
-	      var pt = arguments[1];
-	      var locGeom = arguments[2];
-	      if (line.getEnvelopeInternal().distance(pt.getEnvelopeInternal()) > this._minDistance) { return null }
-	      var coord0 = line.getCoordinates();
-	      var coord = pt.getCoordinate();
-	      for (var i = 0; i < coord0.length - 1; i++) {
-	        var dist = CGAlgorithms.distancePointLine(coord, coord0[i], coord0[i + 1]);
-	        if (dist < this$1._minDistance) {
-	          this$1._minDistance = dist;
-	          var seg = new LineSegment(coord0[i], coord0[i + 1]);
-	          var segClosestPoint = seg.closestPoint(coord);
-	          locGeom[0] = new GeometryLocation(line, i, segClosestPoint);
-	          locGeom[1] = new GeometryLocation(pt, 0, coord);
-	        }
-	        if (this$1._minDistance <= this$1._terminateDistance) { return null }
-	      }
-	    } else if (arguments[2] instanceof Array && (arguments[0] instanceof LineString && arguments[1] instanceof LineString)) {
-	      var line0 = arguments[0];
-	      var line1 = arguments[1];
-	      var locGeom$1 = arguments[2];
-	      if (line0.getEnvelopeInternal().distance(line1.getEnvelopeInternal()) > this._minDistance) { return null }
-	      var coord0$1 = line0.getCoordinates();
-	      var coord1 = line1.getCoordinates();
-	      for (var i$1 = 0; i$1 < coord0$1.length - 1; i$1++) {
-	        for (var j = 0; j < coord1.length - 1; j++) {
-	          var dist$1 = CGAlgorithms.distanceLineLine(coord0$1[i$1], coord0$1[i$1 + 1], coord1[j], coord1[j + 1]);
-	          if (dist$1 < this$1._minDistance) {
-	            this$1._minDistance = dist$1;
-	            var seg0 = new LineSegment(coord0$1[i$1], coord0$1[i$1 + 1]);
-	            var seg1 = new LineSegment(coord1[j], coord1[j + 1]);
-	            var closestPt = seg0.closestPoints(seg1);
-	            locGeom$1[0] = new GeometryLocation(line0, i$1, closestPt[0]);
-	            locGeom$1[1] = new GeometryLocation(line1, j, closestPt[1]);
-	          }
-	          if (this$1._minDistance <= this$1._terminateDistance) { return null }
+
+	    var photoOverlaysUsed = context.history().photoOverlaysUsed();
+
+	    if (photoOverlaysUsed.length) {
+	      var sources = (tags.source || '').split(';'); // include this tag for any photo layer
+
+	      if (sources.indexOf('streetlevel imagery') === -1) {
+	        sources.push('streetlevel imagery');
+	      } // add the photo overlays used during editing as sources
+
+
+	      photoOverlaysUsed.forEach(function (photoOverlay) {
+	        if (sources.indexOf(photoOverlay) === -1) {
+	          sources.push(photoOverlay);
 	        }
-	      }
+	      });
+	      tags.source = context.cleanTagValue(sources.join(';'));
 	    }
-	  }
-	};
-	DistanceOp.prototype.computeMinDistancePoints = function computeMinDistancePoints (points0, points1, locGeom) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < points0.size(); i++) {
-	    var pt0 = points0.get(i);
-	    for (var j = 0; j < points1.size(); j++) {
-	      var pt1 = points1.get(j);
-	      var dist = pt0.getCoordinate().distance(pt1.getCoordinate());
-	      if (dist < this$1._minDistance) {
-	        this$1._minDistance = dist;
-	        locGeom[0] = new GeometryLocation(pt0, 0, pt0.getCoordinate());
-	        locGeom[1] = new GeometryLocation(pt1, 0, pt1.getCoordinate());
+	    context.changeset = new osmChangeset({
+	      tags: tags
+	    });
+	  } // Calculates read-only metadata tags based on the user's editing session and applies
+	  // them to the changeset.
+
+
+	  function loadDerivedChangesetTags() {
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var tags = Object.assign({}, context.changeset.tags); // shallow copy
+	    // assign tags for imagery used
+
+	    var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
+	    tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes
+
+	    var osmClosed = osm.getClosedIDs();
+	    var itemType;
+
+	    if (osmClosed.length) {
+	      tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
+	    }
+
+	    if (services.keepRight) {
+	      var krClosed = services.keepRight.getClosedIDs();
+
+	      if (krClosed.length) {
+	        tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
 	      }
-	      if (this$1._minDistance <= this$1._terminateDistance) { return null }
 	    }
-	  }
-	};
-	DistanceOp.prototype.distance = function distance () {
-	  if (this._geom[0] === null || this._geom[1] === null) { throw new IllegalArgumentException('null geometries are not supported') }
-	  if (this._geom[0].isEmpty() || this._geom[1].isEmpty()) { return 0.0 }
-	  this.computeMinDistance();
-	  return this._minDistance
-	};
-	DistanceOp.prototype.computeMinDistanceLines = function computeMinDistanceLines (lines0, lines1, locGeom) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < lines0.size(); i++) {
-	    var line0 = lines0.get(i);
-	    for (var j = 0; j < lines1.size(); j++) {
-	      var line1 = lines1.get(j);
-	      this$1.computeMinDistance(line0, line1, locGeom);
-	      if (this$1._minDistance <= this$1._terminateDistance) { return null }
+	    if (services.improveOSM) {
+	      var iOsmClosed = services.improveOSM.getClosedCounts();
+
+	      for (itemType in iOsmClosed) {
+	        tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
+	      }
 	    }
-	  }
-	};
-	DistanceOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	DistanceOp.prototype.getClass = function getClass () {
-	  return DistanceOp
-	};
-	DistanceOp.distance = function distance (g0, g1) {
-	  var distOp = new DistanceOp(g0, g1);
-	  return distOp.distance()
-	};
-	DistanceOp.isWithinDistance = function isWithinDistance (g0, g1, distance) {
-	  var distOp = new DistanceOp(g0, g1, distance);
-	  return distOp.distance() <= distance
-	};
-	DistanceOp.nearestPoints = function nearestPoints (g0, g1) {
-	  var distOp = new DistanceOp(g0, g1);
-	  return distOp.nearestPoints()
-	};
 
-	var PointPairDistance$2 = function PointPairDistance () {
-	  this._pt = [new Coordinate(), new Coordinate()];
-	  this._distance = Double.NaN;
-	  this._isNull = true;
-	};
-	PointPairDistance$2.prototype.getCoordinates = function getCoordinates () {
-	  return this._pt
-	};
-	PointPairDistance$2.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pt[i]
-	};
-	PointPairDistance$2.prototype.setMinimum = function setMinimum () {
-	  if (arguments.length === 1) {
-	    var ptDist = arguments[0];
-	    this.setMinimum(ptDist._pt[0], ptDist._pt[1]);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (this._isNull) {
-	      this.initialize(p0, p1);
-	      return null
-	    }
-	    var dist = p0.distance(p1);
-	    if (dist < this._distance) { this.initialize(p0, p1, dist); }
-	  }
-	};
-	PointPairDistance$2.prototype.initialize = function initialize () {
-	  if (arguments.length === 0) {
-	    this._isNull = true;
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    this._pt[0].setCoordinate(p0);
-	    this._pt[1].setCoordinate(p1);
-	    this._distance = p0.distance(p1);
-	    this._isNull = false;
-	  } else if (arguments.length === 3) {
-	    var p0$1 = arguments[0];
-	    var p1$1 = arguments[1];
-	    var distance = arguments[2];
-	    this._pt[0].setCoordinate(p0$1);
-	    this._pt[1].setCoordinate(p1$1);
-	    this._distance = distance;
-	    this._isNull = false;
-	  }
-	};
-	PointPairDistance$2.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(this._pt[0], this._pt[1])
-	};
-	PointPairDistance$2.prototype.getDistance = function getDistance () {
-	  return this._distance
-	};
-	PointPairDistance$2.prototype.setMaximum = function setMaximum () {
-	  if (arguments.length === 1) {
-	    var ptDist = arguments[0];
-	    this.setMaximum(ptDist._pt[0], ptDist._pt[1]);
-	  } else if (arguments.length === 2) {
-	    var p0 = arguments[0];
-	    var p1 = arguments[1];
-	    if (this._isNull) {
-	      this.initialize(p0, p1);
-	      return null
-	    }
-	    var dist = p0.distance(p1);
-	    if (dist > this._distance) { this.initialize(p0, p1, dist); }
-	  }
-	};
-	PointPairDistance$2.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointPairDistance$2.prototype.getClass = function getClass () {
-	  return PointPairDistance$2
-	};
+	    if (services.osmose) {
+	      var osmoseClosed = services.osmose.getClosedCounts();
 
-	var DistanceToPoint = function DistanceToPoint () {};
+	      for (itemType in osmoseClosed) {
+	        tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
+	      }
+	    } // remove existing issue counts
 
-	DistanceToPoint.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	DistanceToPoint.prototype.getClass = function getClass () {
-	  return DistanceToPoint
-	};
-	DistanceToPoint.computeDistance = function computeDistance () {
-	  if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof LineString && arguments[1] instanceof Coordinate)) {
-	    var line = arguments[0];
-	    var pt = arguments[1];
-	    var ptDist = arguments[2];
-	    var tempSegment = new LineSegment();
-	    var coords = line.getCoordinates();
-	    for (var i = 0; i < coords.length - 1; i++) {
-	      tempSegment.setCoordinates(coords[i], coords[i + 1]);
-	      var closestPt = tempSegment.closestPoint(pt);
-	      ptDist.setMinimum(closestPt, pt);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof Polygon && arguments[1] instanceof Coordinate)) {
-	    var poly = arguments[0];
-	    var pt$1 = arguments[1];
-	    var ptDist$1 = arguments[2];
-	    DistanceToPoint.computeDistance(poly.getExteriorRing(), pt$1, ptDist$1);
-	    for (var i$1 = 0; i$1 < poly.getNumInteriorRing(); i$1++) {
-	      DistanceToPoint.computeDistance(poly.getInteriorRingN(i$1), pt$1, ptDist$1);
-	    }
-	  } else if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof Geometry && arguments[1] instanceof Coordinate)) {
-	    var geom = arguments[0];
-	    var pt$2 = arguments[1];
-	    var ptDist$2 = arguments[2];
-	    if (geom instanceof LineString) {
-	      DistanceToPoint.computeDistance(geom, pt$2, ptDist$2);
-	    } else if (geom instanceof Polygon) {
-	      DistanceToPoint.computeDistance(geom, pt$2, ptDist$2);
-	    } else if (geom instanceof GeometryCollection) {
-	      var gc = geom;
-	      for (var i$2 = 0; i$2 < gc.getNumGeometries(); i$2++) {
-	        var g = gc.getGeometryN(i$2);
-	        DistanceToPoint.computeDistance(g, pt$2, ptDist$2);
+
+	    for (var key in tags) {
+	      if (key.match(/(^warnings:)|(^resolved:)/)) {
+	        delete tags[key];
 	      }
-	    } else {
-	      ptDist$2.setMinimum(geom.getCoordinate(), pt$2);
 	    }
-	  } else if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof LineSegment && arguments[1] instanceof Coordinate)) {
-	    var segment = arguments[0];
-	    var pt$3 = arguments[1];
-	    var ptDist$3 = arguments[2];
-	    var closestPt$1 = segment.closestPoint(pt$3);
-	    ptDist$3.setMinimum(closestPt$1, pt$3);
-	  }
-	};
 
-	var DiscreteHausdorffDistance = function DiscreteHausdorffDistance () {
-	  this._g0 = null;
-	  this._g1 = null;
-	  this._ptDist = new PointPairDistance$2();
-	  this._densifyFrac = 0.0;
-	  var g0 = arguments[0];
-	  var g1 = arguments[1];
-	  this._g0 = g0;
-	  this._g1 = g1;
-	};
+	    function addIssueCounts(issues, prefix) {
+	      var issuesByType = utilArrayGroupBy(issues, 'type');
 
-	var staticAccessors$39 = { MaxPointDistanceFilter: { configurable: true },MaxDensifiedByFractionDistanceFilter: { configurable: true } };
-	DiscreteHausdorffDistance.prototype.getCoordinates = function getCoordinates () {
-	  return this._ptDist.getCoordinates()
-	};
-	DiscreteHausdorffDistance.prototype.setDensifyFraction = function setDensifyFraction (densifyFrac) {
-	  if (densifyFrac > 1.0 || densifyFrac <= 0.0) { throw new IllegalArgumentException('Fraction is not in range (0.0 - 1.0]') }
-	  this._densifyFrac = densifyFrac;
-	};
-	DiscreteHausdorffDistance.prototype.compute = function compute (g0, g1) {
-	  this.computeOrientedDistance(g0, g1, this._ptDist);
-	  this.computeOrientedDistance(g1, g0, this._ptDist);
-	};
-	DiscreteHausdorffDistance.prototype.distance = function distance () {
-	  this.compute(this._g0, this._g1);
-	  return this._ptDist.getDistance()
-	};
-	DiscreteHausdorffDistance.prototype.computeOrientedDistance = function computeOrientedDistance (discreteGeom, geom, ptDist) {
-	  var distFilter = new MaxPointDistanceFilter$1(geom);
-	  discreteGeom.apply(distFilter);
-	  ptDist.setMaximum(distFilter.getMaxPointDistance());
-	  if (this._densifyFrac > 0) {
-	    var fracFilter = new MaxDensifiedByFractionDistanceFilter(geom, this._densifyFrac);
-	    discreteGeom.apply(fracFilter);
-	    ptDist.setMaximum(fracFilter.getMaxPointDistance());
-	  }
-	};
-	DiscreteHausdorffDistance.prototype.orientedDistance = function orientedDistance () {
-	  this.computeOrientedDistance(this._g0, this._g1, this._ptDist);
-	  return this._ptDist.getDistance()
-	};
-	DiscreteHausdorffDistance.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	DiscreteHausdorffDistance.prototype.getClass = function getClass () {
-	  return DiscreteHausdorffDistance
-	};
-	DiscreteHausdorffDistance.distance = function distance () {
-	  if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    var dist = new DiscreteHausdorffDistance(g0, g1);
-	    return dist.distance()
-	  } else if (arguments.length === 3) {
-	    var g0$1 = arguments[0];
-	    var g1$1 = arguments[1];
-	    var densifyFrac = arguments[2];
-	    var dist$1 = new DiscreteHausdorffDistance(g0$1, g1$1);
-	    dist$1.setDensifyFraction(densifyFrac);
-	    return dist$1.distance()
-	  }
-	};
-	staticAccessors$39.MaxPointDistanceFilter.get = function () { return MaxPointDistanceFilter$1 };
-	staticAccessors$39.MaxDensifiedByFractionDistanceFilter.get = function () { return MaxDensifiedByFractionDistanceFilter };
-
-	Object.defineProperties( DiscreteHausdorffDistance, staticAccessors$39 );
-
-	var MaxPointDistanceFilter$1 = function MaxPointDistanceFilter () {
-	  this._maxPtDist = new PointPairDistance$2();
-	  this._minPtDist = new PointPairDistance$2();
-	  this._euclideanDist = new DistanceToPoint();
-	  this._geom = null;
-	  var geom = arguments[0];
-	  this._geom = geom;
-	};
-	MaxPointDistanceFilter$1.prototype.filter = function filter (pt) {
-	  this._minPtDist.initialize();
-	  DistanceToPoint.computeDistance(this._geom, pt, this._minPtDist);
-	  this._maxPtDist.setMaximum(this._minPtDist);
-	};
-	MaxPointDistanceFilter$1.prototype.getMaxPointDistance = function getMaxPointDistance () {
-	  return this._maxPtDist
-	};
-	MaxPointDistanceFilter$1.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateFilter]
-	};
-	MaxPointDistanceFilter$1.prototype.getClass = function getClass () {
-	  return MaxPointDistanceFilter$1
-	};
+	      for (var issueType in issuesByType) {
+	        var issuesOfType = issuesByType[issueType];
 
-	var MaxDensifiedByFractionDistanceFilter = function MaxDensifiedByFractionDistanceFilter () {
-	  this._maxPtDist = new PointPairDistance$2();
-	  this._minPtDist = new PointPairDistance$2();
-	  this._geom = null;
-	  this._numSubSegs = 0;
-	  var geom = arguments[0];
-	  var fraction = arguments[1];
-	  this._geom = geom;
-	  this._numSubSegs = Math.trunc(Math.round(1.0 / fraction));
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.filter = function filter (seq, index) {
-	    var this$1 = this;
-
-	  if (index === 0) { return null }
-	  var p0 = seq.getCoordinate(index - 1);
-	  var p1 = seq.getCoordinate(index);
-	  var delx = (p1.x - p0.x) / this._numSubSegs;
-	  var dely = (p1.y - p0.y) / this._numSubSegs;
-	  for (var i = 0; i < this._numSubSegs; i++) {
-	    var x = p0.x + i * delx;
-	    var y = p0.y + i * dely;
-	    var pt = new Coordinate(x, y);
-	    this$1._minPtDist.initialize();
-	    DistanceToPoint.computeDistance(this$1._geom, pt, this$1._minPtDist);
-	    this$1._maxPtDist.setMaximum(this$1._minPtDist);
-	  }
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.isDone = function isDone () {
-	  return false
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.isGeometryChanged = function isGeometryChanged () {
-	  return false
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.getMaxPointDistance = function getMaxPointDistance () {
-	  return this._maxPtDist
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequenceFilter]
-	};
-	MaxDensifiedByFractionDistanceFilter.prototype.getClass = function getClass () {
-	  return MaxDensifiedByFractionDistanceFilter
-	};
+	        if (issuesOfType[0].subtype) {
+	          var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
 
-	var BufferDistanceValidator = function BufferDistanceValidator (input, bufDistance, result) {
-	  this._minValidDistance = null;
-	  this._maxValidDistance = null;
-	  this._minDistanceFound = null;
-	  this._maxDistanceFound = null;
-	  this._isValid = true;
-	  this._errMsg = null;
-	  this._errorLocation = null;
-	  this._errorIndicator = null;
-	  this._input = input || null;
-	  this._bufDistance = bufDistance || null;
-	  this._result = result || null;
-	};
+	          for (var issueSubtype in issuesBySubtype) {
+	            var issuesOfSubtype = issuesBySubtype[issueSubtype];
+	            tags[prefix + ':' + issueType + ':' + issueSubtype] = context.cleanTagValue(issuesOfSubtype.length.toString());
+	          }
+	        } else {
+	          tags[prefix + ':' + issueType] = context.cleanTagValue(issuesOfType.length.toString());
+	        }
+	      }
+	    } // add counts of warnings generated by the user's edits
 
-	var staticAccessors$37 = { VERBOSE: { configurable: true },MAX_DISTANCE_DIFF_FRAC: { configurable: true } };
-	BufferDistanceValidator.prototype.checkMaximumDistance = function checkMaximumDistance (input, bufCurve, maxDist) {
-	  var haus = new DiscreteHausdorffDistance(bufCurve, input);
-	  haus.setDensifyFraction(0.25);
-	  this._maxDistanceFound = haus.orientedDistance();
-	  if (this._maxDistanceFound > maxDist) {
-	    this._isValid = false;
-	    var pts = haus.getCoordinates();
-	    this._errorLocation = pts[1];
-	    this._errorIndicator = input.getFactory().createLineString(pts);
-	    this._errMsg = 'Distance between buffer curve and input is too large (' + this._maxDistanceFound + ' at ' + WKTWriter.toLineString(pts[0], pts[1]) + ')';
-	  }
-	};
-	BufferDistanceValidator.prototype.isValid = function isValid () {
-	  var posDistance = Math.abs(this._bufDistance);
-	  var distDelta = BufferDistanceValidator.MAX_DISTANCE_DIFF_FRAC * posDistance;
-	  this._minValidDistance = posDistance - distDelta;
-	  this._maxValidDistance = posDistance + distDelta;
-	  if (this._input.isEmpty() || this._result.isEmpty()) { return true }
-	  if (this._bufDistance > 0.0) {
-	    this.checkPositiveValid();
-	  } else {
-	    this.checkNegativeValid();
-	  }
-	  if (BufferDistanceValidator.VERBOSE) {
-	    System.out.println('Min Dist= ' + this._minDistanceFound + '  err= ' + (1.0 - this._minDistanceFound / this._bufDistance) + '  Max Dist= ' + this._maxDistanceFound + '  err= ' + (this._maxDistanceFound / this._bufDistance - 1.0));
-	  }
-	  return this._isValid
-	};
-	BufferDistanceValidator.prototype.checkNegativeValid = function checkNegativeValid () {
-	  if (!(this._input instanceof Polygon || this._input instanceof MultiPolygon || this._input instanceof GeometryCollection)) {
-	    return null
-	  }
-	  var inputCurve = this.getPolygonLines(this._input);
-	  this.checkMinimumDistance(inputCurve, this._result, this._minValidDistance);
-	  if (!this._isValid) { return null }
-	  this.checkMaximumDistance(inputCurve, this._result, this._maxValidDistance);
-	};
-	BufferDistanceValidator.prototype.getErrorIndicator = function getErrorIndicator () {
-	  return this._errorIndicator
-	};
-	BufferDistanceValidator.prototype.checkMinimumDistance = function checkMinimumDistance (g1, g2, minDist) {
-	  var distOp = new DistanceOp(g1, g2, minDist);
-	  this._minDistanceFound = distOp.distance();
-	  if (this._minDistanceFound < minDist) {
-	    this._isValid = false;
-	    var pts = distOp.nearestPoints();
-	    this._errorLocation = distOp.nearestPoints()[1];
-	    this._errorIndicator = g1.getFactory().createLineString(pts);
-	    this._errMsg = 'Distance between buffer curve and input is too small (' + this._minDistanceFound + ' at ' + WKTWriter.toLineString(pts[0], pts[1]) + ' )';
+
+	    var warnings = context.validator().getIssuesBySeverity({
+	      what: 'edited',
+	      where: 'all',
+	      includeIgnored: true,
+	      includeDisabledRules: true
+	    }).warning;
+	    addIssueCounts(warnings, 'warnings'); // add counts of issues resolved by the user's edits
+
+	    var resolvedIssues = context.validator().getResolvedIssues();
+	    addIssueCounts(resolvedIssues, 'resolved');
+	    context.changeset = context.changeset.update({
+	      tags: tags
+	    });
 	  }
-	};
-	BufferDistanceValidator.prototype.checkPositiveValid = function checkPositiveValid () {
-	  var bufCurve = this._result.getBoundary();
-	  this.checkMinimumDistance(this._input, bufCurve, this._minValidDistance);
-	  if (!this._isValid) { return null }
-	  this.checkMaximumDistance(this._input, bufCurve, this._maxValidDistance);
-	};
-	BufferDistanceValidator.prototype.getErrorLocation = function getErrorLocation () {
-	  return this._errorLocation
-	};
-	BufferDistanceValidator.prototype.getPolygonLines = function getPolygonLines (g) {
-	  var lines = new ArrayList();
-	  var lineExtracter = new LinearComponentExtracter(lines);
-	  var polys = PolygonExtracter.getPolygons(g);
-	  for (var i = polys.iterator(); i.hasNext();) {
-	    var poly = i.next();
-	    poly.apply(lineExtracter);
-	  }
-	  return g.getFactory().buildGeometry(lines)
-	};
-	BufferDistanceValidator.prototype.getErrorMessage = function getErrorMessage () {
-	  return this._errMsg
-	};
-	BufferDistanceValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferDistanceValidator.prototype.getClass = function getClass () {
-	  return BufferDistanceValidator
-	};
-	staticAccessors$37.VERBOSE.get = function () { return false };
-	staticAccessors$37.MAX_DISTANCE_DIFF_FRAC.get = function () { return 0.012 };
-
-	Object.defineProperties( BufferDistanceValidator, staticAccessors$37 );
-
-	var BufferResultValidator = function BufferResultValidator (input, distance, result) {
-	  this._isValid = true;
-	  this._errorMsg = null;
-	  this._errorLocation = null;
-	  this._errorIndicator = null;
-	  this._input = input || null;
-	  this._distance = distance || null;
-	  this._result = result || null;
-	};
 
-	var staticAccessors$40 = { VERBOSE: { configurable: true },MAX_ENV_DIFF_FRAC: { configurable: true } };
-	BufferResultValidator.prototype.isValid = function isValid () {
-	  this.checkPolygonal();
-	  if (!this._isValid) { return this._isValid }
-	  this.checkExpectedEmpty();
-	  if (!this._isValid) { return this._isValid }
-	  this.checkEnvelope();
-	  if (!this._isValid) { return this._isValid }
-	  this.checkArea();
-	  if (!this._isValid) { return this._isValid }
-	  this.checkDistance();
-	  return this._isValid
-	};
-	BufferResultValidator.prototype.checkEnvelope = function checkEnvelope () {
-	  if (this._distance < 0.0) { return null }
-	  var padding = this._distance * BufferResultValidator.MAX_ENV_DIFF_FRAC;
-	  if (padding === 0.0) { padding = 0.001; }
-	  var expectedEnv = new Envelope(this._input.getEnvelopeInternal());
-	  expectedEnv.expandBy(this._distance);
-	  var bufEnv = new Envelope(this._result.getEnvelopeInternal());
-	  bufEnv.expandBy(padding);
-	  if (!bufEnv.contains(expectedEnv)) {
-	    this._isValid = false;
-	    this._errorMsg = 'Buffer envelope is incorrect';
-	    this._errorIndicator = this._input.getFactory().toGeometry(bufEnv);
-	  }
-	  this.report('Envelope');
-	};
-	BufferResultValidator.prototype.checkDistance = function checkDistance () {
-	  var distValid = new BufferDistanceValidator(this._input, this._distance, this._result);
-	  if (!distValid.isValid()) {
-	    this._isValid = false;
-	    this._errorMsg = distValid.getErrorMessage();
-	    this._errorLocation = distValid.getErrorLocation();
-	    this._errorIndicator = distValid.getErrorIndicator();
-	  }
-	  this.report('Distance');
-	};
-	BufferResultValidator.prototype.checkArea = function checkArea () {
-	  var inputArea = this._input.getArea();
-	  var resultArea = this._result.getArea();
-	  if (this._distance > 0.0 && inputArea > resultArea) {
-	    this._isValid = false;
-	    this._errorMsg = 'Area of positive buffer is smaller than input';
-	    this._errorIndicator = this._result;
-	  }
-	  if (this._distance < 0.0 && inputArea < resultArea) {
-	    this._isValid = false;
-	    this._errorMsg = 'Area of negative buffer is larger than input';
-	    this._errorIndicator = this._result;
-	  }
-	  this.report('Area');
-	};
-	BufferResultValidator.prototype.checkPolygonal = function checkPolygonal () {
-	  if (!(this._result instanceof Polygon || this._result instanceof MultiPolygon)) { this._isValid = false; }
-	  this._errorMsg = 'Result is not polygonal';
-	  this._errorIndicator = this._result;
-	  this.report('Polygonal');
-	};
-	BufferResultValidator.prototype.getErrorIndicator = function getErrorIndicator () {
-	  return this._errorIndicator
-	};
-	BufferResultValidator.prototype.getErrorLocation = function getErrorLocation () {
-	  return this._errorLocation
-	};
-	BufferResultValidator.prototype.checkExpectedEmpty = function checkExpectedEmpty () {
-	  if (this._input.getDimension() >= 2) { return null }
-	  if (this._distance > 0.0) { return null }
-	  if (!this._result.isEmpty()) {
-	    this._isValid = false;
-	    this._errorMsg = 'Result is non-empty';
-	    this._errorIndicator = this._result;
-	  }
-	  this.report('ExpectedEmpty');
-	};
-	BufferResultValidator.prototype.report = function report (checkName) {
-	  if (!BufferResultValidator.VERBOSE) { return null }
-	  System.out.println('Check ' + checkName + ': ' + (this._isValid ? 'passed' : 'FAILED'));
-	};
-	BufferResultValidator.prototype.getErrorMessage = function getErrorMessage () {
-	  return this._errorMsg
-	};
-	BufferResultValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	BufferResultValidator.prototype.getClass = function getClass () {
-	  return BufferResultValidator
-	};
-	BufferResultValidator.isValidMsg = function isValidMsg (g, distance, result) {
-	  var validator = new BufferResultValidator(g, distance, result);
-	  if (!validator.isValid()) { return validator.getErrorMessage() }
-	  return null
-	};
-	BufferResultValidator.isValid = function isValid (g, distance, result) {
-	  var validator = new BufferResultValidator(g, distance, result);
-	  if (validator.isValid()) { return true }
-	  return false
-	};
-	staticAccessors$40.VERBOSE.get = function () { return false };
-	staticAccessors$40.MAX_ENV_DIFF_FRAC.get = function () { return 0.012 };
+	  function render(selection) {
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var header = selection.selectAll('.header').data([0]);
+	    var headerTitle = header.enter().append('div').attr('class', 'header fillL');
+	    headerTitle.append('div').append('h3').html(_t.html('commit.title'));
+	    headerTitle.append('button').attr('class', 'close').on('click', function () {
+	      dispatch$1.call('cancel', this);
+	    }).call(svgIcon('#iD-icon-close'));
+	    var body = selection.selectAll('.body').data([0]);
+	    body = body.enter().append('div').attr('class', 'body').merge(body); // Changeset Section
 
-	Object.defineProperties( BufferResultValidator, staticAccessors$40 );
+	    var changesetSection = body.selectAll('.changeset-editor').data([0]);
+	    changesetSection = changesetSection.enter().append('div').attr('class', 'modal-section changeset-editor').merge(changesetSection);
+	    changesetSection.call(changesetEditor.changesetID(context.changeset.id).tags(context.changeset.tags)); // Warnings
 
-	// operation.buffer
+	    body.call(commitWarnings); // Upload Explanation
 
-	var BasicSegmentString = function BasicSegmentString () {
-	  this._pts = null;
-	  this._data = null;
-	  var pts = arguments[0];
-	  var data = arguments[1];
-	  this._pts = pts;
-	  this._data = data;
-	};
-	BasicSegmentString.prototype.getCoordinates = function getCoordinates () {
-	  return this._pts
-	};
-	BasicSegmentString.prototype.size = function size () {
-	  return this._pts.length
-	};
-	BasicSegmentString.prototype.getCoordinate = function getCoordinate (i) {
-	  return this._pts[i]
-	};
-	BasicSegmentString.prototype.isClosed = function isClosed () {
-	  return this._pts[0].equals(this._pts[this._pts.length - 1])
-	};
-	BasicSegmentString.prototype.getSegmentOctant = function getSegmentOctant (index) {
-	  if (index === this._pts.length - 1) { return -1 }
-	  return Octant.octant(this.getCoordinate(index), this.getCoordinate(index + 1))
-	};
-	BasicSegmentString.prototype.setData = function setData (data) {
-	  this._data = data;
-	};
-	BasicSegmentString.prototype.getData = function getData () {
-	  return this._data
-	};
-	BasicSegmentString.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(new CoordinateArraySequence(this._pts))
-	};
-	BasicSegmentString.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentString]
-	};
-	BasicSegmentString.prototype.getClass = function getClass () {
-	  return BasicSegmentString
-	};
+	    var saveSection = body.selectAll('.save-section').data([0]);
+	    saveSection = saveSection.enter().append('div').attr('class', 'modal-section save-section fillL').merge(saveSection);
+	    var prose = saveSection.selectAll('.commit-info').data([0]);
 
-	var InteriorIntersectionFinder = function InteriorIntersectionFinder () {
-	  this._findAllIntersections = false;
-	  this._isCheckEndSegmentsOnly = false;
-	  this._li = null;
-	  this._interiorIntersection = null;
-	  this._intSegments = null;
-	  this._intersections = new ArrayList();
-	  this._intersectionCount = 0;
-	  this._keepIntersections = true;
-	  var li = arguments[0];
-	  this._li = li;
-	  this._interiorIntersection = null;
-	};
-	InteriorIntersectionFinder.prototype.getInteriorIntersection = function getInteriorIntersection () {
-	  return this._interiorIntersection
-	};
-	InteriorIntersectionFinder.prototype.setCheckEndSegmentsOnly = function setCheckEndSegmentsOnly (isCheckEndSegmentsOnly) {
-	  this._isCheckEndSegmentsOnly = isCheckEndSegmentsOnly;
-	};
-	InteriorIntersectionFinder.prototype.getIntersectionSegments = function getIntersectionSegments () {
-	  return this._intSegments
-	};
-	InteriorIntersectionFinder.prototype.count = function count () {
-	  return this._intersectionCount
-	};
-	InteriorIntersectionFinder.prototype.getIntersections = function getIntersections () {
-	  return this._intersections
-	};
-	InteriorIntersectionFinder.prototype.setFindAllIntersections = function setFindAllIntersections (findAllIntersections) {
-	  this._findAllIntersections = findAllIntersections;
-	};
-	InteriorIntersectionFinder.prototype.setKeepIntersections = function setKeepIntersections (keepIntersections) {
-	  this._keepIntersections = keepIntersections;
-	};
-	InteriorIntersectionFinder.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {
-	  if (!this._findAllIntersections && this.hasIntersection()) { return null }
-	  if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	  if (this._isCheckEndSegmentsOnly) {
-	    var isEndSegPresent = this.isEndSegment(e0, segIndex0) || this.isEndSegment(e1, segIndex1);
-	    if (!isEndSegPresent) { return null }
-	  }
-	  var p00 = e0.getCoordinates()[segIndex0];
-	  var p01 = e0.getCoordinates()[segIndex0 + 1];
-	  var p10 = e1.getCoordinates()[segIndex1];
-	  var p11 = e1.getCoordinates()[segIndex1 + 1];
-	  this._li.computeIntersection(p00, p01, p10, p11);
-	  if (this._li.hasIntersection()) {
-	    if (this._li.isInteriorIntersection()) {
-	      this._intSegments = new Array(4).fill(null);
-	      this._intSegments[0] = p00;
-	      this._intSegments[1] = p01;
-	      this._intSegments[2] = p10;
-	      this._intSegments[3] = p11;
-	      this._interiorIntersection = this._li.getIntersection(0);
-	      if (this._keepIntersections) { this._intersections.add(this._interiorIntersection); }
-	      this._intersectionCount++;
+	    if (prose.enter().size()) {
+	      // first time, make sure to update user details in prose
+	      _userDetails = null;
 	    }
-	  }
-	};
-	InteriorIntersectionFinder.prototype.isEndSegment = function isEndSegment (segStr, index) {
-	  if (index === 0) { return true }
-	  if (index >= segStr.size() - 2) { return true }
-	  return false
-	};
-	InteriorIntersectionFinder.prototype.hasIntersection = function hasIntersection () {
-	  return this._interiorIntersection !== null
-	};
-	InteriorIntersectionFinder.prototype.isDone = function isDone () {
-	  if (this._findAllIntersections) { return false }
-	  return this._interiorIntersection !== null
-	};
-	InteriorIntersectionFinder.prototype.interfaces_ = function interfaces_ () {
-	  return [SegmentIntersector]
-	};
-	InteriorIntersectionFinder.prototype.getClass = function getClass () {
-	  return InteriorIntersectionFinder
-	};
-	InteriorIntersectionFinder.createAllIntersectionsFinder = function createAllIntersectionsFinder (li) {
-	  var finder = new InteriorIntersectionFinder(li);
-	  finder.setFindAllIntersections(true);
-	  return finder
-	};
-	InteriorIntersectionFinder.createAnyIntersectionFinder = function createAnyIntersectionFinder (li) {
-	  return new InteriorIntersectionFinder(li)
-	};
-	InteriorIntersectionFinder.createIntersectionCounter = function createIntersectionCounter (li) {
-	  var finder = new InteriorIntersectionFinder(li);
-	  finder.setFindAllIntersections(true);
-	  finder.setKeepIntersections(false);
-	  return finder
-	};
 
-	var FastNodingValidator = function FastNodingValidator () {
-	  this._li = new RobustLineIntersector();
-	  this._segStrings = null;
-	  this._findAllIntersections = false;
-	  this._segInt = null;
-	  this._isValid = true;
-	  var segStrings = arguments[0];
-	  this._segStrings = segStrings;
-	};
-	FastNodingValidator.prototype.execute = function execute () {
-	  if (this._segInt !== null) { return null }
-	  this.checkInteriorIntersections();
-	};
-	FastNodingValidator.prototype.getIntersections = function getIntersections () {
-	  return this._segInt.getIntersections()
-	};
-	FastNodingValidator.prototype.isValid = function isValid () {
-	  this.execute();
-	  return this._isValid
-	};
-	FastNodingValidator.prototype.setFindAllIntersections = function setFindAllIntersections (findAllIntersections) {
-	  this._findAllIntersections = findAllIntersections;
-	};
-	FastNodingValidator.prototype.checkInteriorIntersections = function checkInteriorIntersections () {
-	  this._isValid = true;
-	  this._segInt = new InteriorIntersectionFinder(this._li);
-	  this._segInt.setFindAllIntersections(this._findAllIntersections);
-	  var noder = new MCIndexNoder();
-	  noder.setSegmentIntersector(this._segInt);
-	  noder.computeNodes(this._segStrings);
-	  if (this._segInt.hasIntersection()) {
-	    this._isValid = false;
-	    return null
-	  }
-	};
-	FastNodingValidator.prototype.checkValid = function checkValid () {
-	  this.execute();
-	  if (!this._isValid) { throw new TopologyException(this.getErrorMessage(), this._segInt.getInteriorIntersection()) }
-	};
-	FastNodingValidator.prototype.getErrorMessage = function getErrorMessage () {
-	  if (this._isValid) { return 'no intersections found' }
-	  var intSegs = this._segInt.getIntersectionSegments();
-	  return 'found non-noded intersection between ' + WKTWriter.toLineString(intSegs[0], intSegs[1]) + ' and ' + WKTWriter.toLineString(intSegs[2], intSegs[3])
-	};
-	FastNodingValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	FastNodingValidator.prototype.getClass = function getClass () {
-	  return FastNodingValidator
-	};
-	FastNodingValidator.computeIntersections = function computeIntersections (segStrings) {
-	  var nv = new FastNodingValidator(segStrings);
-	  nv.setFindAllIntersections(true);
-	  nv.isValid();
-	  return nv.getIntersections()
-	};
+	    prose = prose.enter().append('p').attr('class', 'commit-info').html(_t.html('commit.upload_explanation')).merge(prose); // always check if this has changed, but only update prose.html()
+	    // if needed, because it can trigger a style recalculation
 
-	var EdgeNodingValidator = function EdgeNodingValidator () {
-	  this._nv = null;
-	  var edges = arguments[0];
-	  this._nv = new FastNodingValidator(EdgeNodingValidator.toSegmentStrings(edges));
-	};
-	EdgeNodingValidator.prototype.checkValid = function checkValid () {
-	  this._nv.checkValid();
-	};
-	EdgeNodingValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeNodingValidator.prototype.getClass = function getClass () {
-	  return EdgeNodingValidator
-	};
-	EdgeNodingValidator.toSegmentStrings = function toSegmentStrings (edges) {
-	  var segStrings = new ArrayList();
-	  for (var i = edges.iterator(); i.hasNext();) {
-	    var e = i.next();
-	    segStrings.add(new BasicSegmentString(e.getCoordinates(), e));
-	  }
-	  return segStrings
-	};
-	EdgeNodingValidator.checkValid = function checkValid (edges) {
-	  var validator = new EdgeNodingValidator(edges);
-	  validator.checkValid();
-	};
+	    osm.userDetails(function (err, user) {
+	      if (err) return;
+	      if (_userDetails === user) return; // no change
 
-	var GeometryCollectionMapper = function GeometryCollectionMapper (mapOp) {
-	  this._mapOp = mapOp;
-	};
-	GeometryCollectionMapper.prototype.map = function map (gc) {
-	    var this$1 = this;
+	      _userDetails = user;
+	      var userLink = select(document.createElement('div'));
 
-	  var mapped = new ArrayList();
-	  for (var i = 0; i < gc.getNumGeometries(); i++) {
-	    var g = this$1._mapOp.map(gc.getGeometryN(i));
-	    if (!g.isEmpty()) { mapped.add(g); }
-	  }
-	  return gc.getFactory().createGeometryCollection(GeometryFactory.toGeometryArray(mapped))
-	};
-	GeometryCollectionMapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryCollectionMapper.prototype.getClass = function getClass () {
-	  return GeometryCollectionMapper
-	};
-	GeometryCollectionMapper.map = function map (gc, op) {
-	  var mapper = new GeometryCollectionMapper(op);
-	  return mapper.map(gc)
-	};
+	      if (user.image_url) {
+	        userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+	      }
 
-	var LineBuilder = function LineBuilder () {
-	  this._op = null;
-	  this._geometryFactory = null;
-	  this._ptLocator = null;
-	  this._lineEdgesList = new ArrayList();
-	  this._resultLineList = new ArrayList();
-	  var op = arguments[0];
-	  var geometryFactory = arguments[1];
-	  var ptLocator = arguments[2];
-	  this._op = op;
-	  this._geometryFactory = geometryFactory;
-	  this._ptLocator = ptLocator;
-	};
-	LineBuilder.prototype.collectLines = function collectLines (opCode) {
-	    var this$1 = this;
+	      userLink.append('a').attr('class', 'user-info').html(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
+	      prose.html(_t.html('commit.upload_explanation_with_user', {
+	        user: userLink.html()
+	      }));
+	    }); // Request Review
 
-	  for (var it = this._op.getGraph().getEdgeEnds().iterator(); it.hasNext();) {
-	    var de = it.next();
-	    this$1.collectLineEdge(de, opCode, this$1._lineEdgesList);
-	    this$1.collectBoundaryTouchEdge(de, opCode, this$1._lineEdgesList);
-	  }
-	};
-	LineBuilder.prototype.labelIsolatedLine = function labelIsolatedLine (e, targetIndex) {
-	  var loc = this._ptLocator.locate(e.getCoordinate(), this._op.getArgGeometry(targetIndex));
-	  e.getLabel().setLocation(targetIndex, loc);
-	};
-	LineBuilder.prototype.build = function build (opCode) {
-	  this.findCoveredLineEdges();
-	  this.collectLines(opCode);
-	  this.buildLines(opCode);
-	  return this._resultLineList
-	};
-	LineBuilder.prototype.collectLineEdge = function collectLineEdge (de, opCode, edges) {
-	  var label = de.getLabel();
-	  var e = de.getEdge();
-	  if (de.isLineEdge()) {
-	    if (!de.isVisited() && OverlayOp.isResultOfOp(label, opCode) && !e.isCovered()) {
-	      edges.add(e);
-	      de.setVisitedEdge(true);
-	    }
-	  }
-	};
-	LineBuilder.prototype.findCoveredLineEdges = function findCoveredLineEdges () {
-	    var this$1 = this;
+	    var requestReview = saveSection.selectAll('.request-review').data([0]); // Enter
 
-	  for (var nodeit = this._op.getGraph().getNodes().iterator(); nodeit.hasNext();) {
-	    var node = nodeit.next();
-	    node.getEdges().findCoveredLineEdges();
-	  }
-	  for (var it = this._op.getGraph().getEdgeEnds().iterator(); it.hasNext();) {
-	    var de = it.next();
-	    var e = de.getEdge();
-	    if (de.isLineEdge() && !e.isCoveredSet()) {
-	      var isCovered = this$1._op.isCoveredByA(de.getCoordinate());
-	      e.setCovered(isCovered);
-	    }
-	  }
-	};
-	LineBuilder.prototype.labelIsolatedLines = function labelIsolatedLines (edgesList) {
-	    var this$1 = this;
+	    var requestReviewEnter = requestReview.enter().append('div').attr('class', 'request-review');
+	    var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
+	    var labelEnter = requestReviewEnter.append('label').attr('for', requestReviewDomId);
+	    labelEnter.append('input').attr('type', 'checkbox').attr('id', requestReviewDomId);
+	    labelEnter.append('span').html(_t.html('commit.request_review')); // Update
 
-	  for (var it = edgesList.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    var label = e.getLabel();
-	    if (e.isIsolated()) {
-	      if (label.isNull(0)) { this$1.labelIsolatedLine(e, 0); } else { this$1.labelIsolatedLine(e, 1); }
-	    }
-	  }
-	};
-	LineBuilder.prototype.buildLines = function buildLines (opCode) {
-	    var this$1 = this;
+	    requestReview = requestReview.merge(requestReviewEnter);
+	    var requestReviewInput = requestReview.selectAll('input').property('checked', isReviewRequested(context.changeset.tags)).on('change', toggleRequestReview); // Buttons
 
-	  for (var it = this._lineEdgesList.iterator(); it.hasNext();) {
-	    var e = it.next();
-	    // const label = e.getLabel()
-	    var line = this$1._geometryFactory.createLineString(e.getCoordinates());
-	    this$1._resultLineList.add(line);
-	    e.setInResult(true);
-	  }
-	};
-	LineBuilder.prototype.collectBoundaryTouchEdge = function collectBoundaryTouchEdge (de, opCode, edges) {
-	  var label = de.getLabel();
-	  if (de.isLineEdge()) { return null }
-	  if (de.isVisited()) { return null }
-	  if (de.isInteriorAreaEdge()) { return null }
-	  if (de.getEdge().isInResult()) { return null }
-	  Assert.isTrue(!(de.isInResult() || de.getSym().isInResult()) || !de.getEdge().isInResult());
-	  if (OverlayOp.isResultOfOp(label, opCode) && opCode === OverlayOp.INTERSECTION) {
-	    edges.add(de.getEdge());
-	    de.setVisitedEdge(true);
-	  }
-	};
-	LineBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	LineBuilder.prototype.getClass = function getClass () {
-	  return LineBuilder
-	};
+	    var buttonSection = saveSection.selectAll('.buttons').data([0]); // enter
 
-	var PointBuilder = function PointBuilder () {
-	  this._op = null;
-	  this._geometryFactory = null;
-	  this._resultPointList = new ArrayList();
-	  var op = arguments[0];
-	  var geometryFactory = arguments[1];
-	  // const ptLocator = arguments[2]
-	  this._op = op;
-	  this._geometryFactory = geometryFactory;
-	};
-	PointBuilder.prototype.filterCoveredNodeToPoint = function filterCoveredNodeToPoint (n) {
-	  var coord = n.getCoordinate();
-	  if (!this._op.isCoveredByLA(coord)) {
-	    var pt = this._geometryFactory.createPoint(coord);
-	    this._resultPointList.add(pt);
-	  }
-	};
-	PointBuilder.prototype.extractNonCoveredResultNodes = function extractNonCoveredResultNodes (opCode) {
-	    var this$1 = this;
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons fillL');
+	    buttonEnter.append('button').attr('class', 'secondary-action button cancel-button').append('span').attr('class', 'label').html(_t.html('commit.cancel'));
+	    var uploadButton = buttonEnter.append('button').attr('class', 'action button save-button');
+	    uploadButton.append('span').attr('class', 'label').html(_t.html('commit.save'));
+	    var uploadBlockerTooltipText = getUploadBlockerMessage(); // update
 
-	  for (var nodeit = this._op.getGraph().getNodes().iterator(); nodeit.hasNext();) {
-	    var n = nodeit.next();
-	    if (n.isInResult()) { continue }
-	    if (n.isIncidentEdgeInResult()) { continue }
-	    if (n.getEdges().getDegree() === 0 || opCode === OverlayOp.INTERSECTION) {
-	      var label = n.getLabel();
-	      if (OverlayOp.isResultOfOp(label, opCode)) {
-	        this$1.filterCoveredNodeToPoint(n);
+	    buttonSection = buttonSection.merge(buttonEnter);
+	    buttonSection.selectAll('.cancel-button').on('click.cancel', function () {
+	      dispatch$1.call('cancel', this);
+	    });
+	    buttonSection.selectAll('.save-button').classed('disabled', uploadBlockerTooltipText !== null).on('click.save', function () {
+	      if (!select(this).classed('disabled')) {
+	        this.blur(); // avoid keeping focus on the button - #4641
+
+	        for (var key in context.changeset.tags) {
+	          // remove any empty keys before upload
+	          if (!key) delete context.changeset.tags[key];
+	        }
+
+	        context.uploader().save(context.changeset);
 	      }
+	    }); // remove any existing tooltip
+
+	    uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
+
+	    if (uploadBlockerTooltipText) {
+	      buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
+	    } // Raw Tag Editor
+
+
+	    var tagSection = body.selectAll('.tag-section.raw-tag-editor').data([0]);
+	    tagSection = tagSection.enter().append('div').attr('class', 'modal-section tag-section raw-tag-editor').merge(tagSection);
+	    tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
+	    .render);
+	    var changesSection = body.selectAll('.commit-changes-section').data([0]);
+	    changesSection = changesSection.enter().append('div').attr('class', 'modal-section commit-changes-section').merge(changesSection); // Change summary
+
+	    changesSection.call(commitChanges.render);
+
+	    function toggleRequestReview() {
+	      var rr = requestReviewInput.property('checked');
+	      updateChangeset({
+	        review_requested: rr ? 'yes' : undefined
+	      });
+	      tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
+	      .render);
 	    }
 	  }
-	};
-	PointBuilder.prototype.build = function build (opCode) {
-	  this.extractNonCoveredResultNodes(opCode);
-	  return this._resultPointList
-	};
-	PointBuilder.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointBuilder.prototype.getClass = function getClass () {
-	  return PointBuilder
-	};
 
-	var GeometryTransformer = function GeometryTransformer () {
-	  this._inputGeom = null;
-	  this._factory = null;
-	  this._pruneEmptyGeometry = true;
-	  this._preserveGeometryCollectionType = true;
-	  this._preserveCollections = false;
-	  this._preserveType = false;
-	};
-	GeometryTransformer.prototype.transformPoint = function transformPoint (geom, parent) {
-	  return this._factory.createPoint(this.transformCoordinates(geom.getCoordinateSequence(), geom))
-	};
-	GeometryTransformer.prototype.transformPolygon = function transformPolygon (geom, parent) {
-	    var this$1 = this;
-
-	  var isAllValidLinearRings = true;
-	  var shell = this.transformLinearRing(geom.getExteriorRing(), geom);
-	  if (shell === null || !(shell instanceof LinearRing) || shell.isEmpty()) { isAllValidLinearRings = false; }
-	  var holes = new ArrayList();
-	  for (var i = 0; i < geom.getNumInteriorRing(); i++) {
-	    var hole = this$1.transformLinearRing(geom.getInteriorRingN(i), geom);
-	    if (hole === null || hole.isEmpty()) {
-	      continue
-	    }
-	    if (!(hole instanceof LinearRing)) { isAllValidLinearRings = false; }
-	    holes.add(hole);
-	  }
-	  if (isAllValidLinearRings) { return this._factory.createPolygon(shell, holes.toArray([])); } else {
-	    var components = new ArrayList();
-	    if (shell !== null) { components.add(shell); }
-	    components.addAll(holes);
-	    return this._factory.buildGeometry(components)
-	  }
-	};
-	GeometryTransformer.prototype.createCoordinateSequence = function createCoordinateSequence (coords) {
-	  return this._factory.getCoordinateSequenceFactory().create(coords)
-	};
-	GeometryTransformer.prototype.getInputGeometry = function getInputGeometry () {
-	  return this._inputGeom
-	};
-	GeometryTransformer.prototype.transformMultiLineString = function transformMultiLineString (geom, parent) {
-	    var this$1 = this;
+	  function getUploadBlockerMessage() {
+	    var errors = context.validator().getIssuesBySeverity({
+	      what: 'edited',
+	      where: 'all'
+	    }).error;
 
-	  var transGeomList = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var transformGeom = this$1.transformLineString(geom.getGeometryN(i), geom);
-	    if (transformGeom === null) { continue }
-	    if (transformGeom.isEmpty()) { continue }
-	    transGeomList.add(transformGeom);
-	  }
-	  return this._factory.buildGeometry(transGeomList)
-	};
-	GeometryTransformer.prototype.transformCoordinates = function transformCoordinates (coords, parent) {
-	  return this.copy(coords)
-	};
-	GeometryTransformer.prototype.transformLineString = function transformLineString (geom, parent) {
-	  return this._factory.createLineString(this.transformCoordinates(geom.getCoordinateSequence(), geom))
-	};
-	GeometryTransformer.prototype.transformMultiPoint = function transformMultiPoint (geom, parent) {
-	    var this$1 = this;
+	    if (errors.length) {
+	      return _t('commit.outstanding_errors_message', {
+	        count: errors.length
+	      });
+	    } else {
+	      var hasChangesetComment = context.changeset && context.changeset.tags.comment && context.changeset.tags.comment.trim().length;
 
-	  var transGeomList = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var transformGeom = this$1.transformPoint(geom.getGeometryN(i), geom);
-	    if (transformGeom === null) { continue }
-	    if (transformGeom.isEmpty()) { continue }
-	    transGeomList.add(transformGeom);
-	  }
-	  return this._factory.buildGeometry(transGeomList)
-	};
-	GeometryTransformer.prototype.transformMultiPolygon = function transformMultiPolygon (geom, parent) {
-	    var this$1 = this;
+	      if (!hasChangesetComment) {
+	        return _t('commit.comment_needed_message');
+	      }
+	    }
 
-	  var transGeomList = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var transformGeom = this$1.transformPolygon(geom.getGeometryN(i), geom);
-	    if (transformGeom === null) { continue }
-	    if (transformGeom.isEmpty()) { continue }
-	    transGeomList.add(transformGeom);
+	    return null;
 	  }
-	  return this._factory.buildGeometry(transGeomList)
-	};
-	GeometryTransformer.prototype.copy = function copy (seq) {
-	  return seq.copy()
-	};
-	GeometryTransformer.prototype.transformGeometryCollection = function transformGeometryCollection (geom, parent) {
-	    var this$1 = this;
-
-	  var transGeomList = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var transformGeom = this$1.transform(geom.getGeometryN(i));
-	    if (transformGeom === null) { continue }
-	    if (this$1._pruneEmptyGeometry && transformGeom.isEmpty()) { continue }
-	    transGeomList.add(transformGeom);
-	  }
-	  if (this._preserveGeometryCollectionType) { return this._factory.createGeometryCollection(GeometryFactory.toGeometryArray(transGeomList)) }
-	  return this._factory.buildGeometry(transGeomList)
-	};
-	GeometryTransformer.prototype.transform = function transform (inputGeom) {
-	  this._inputGeom = inputGeom;
-	  this._factory = inputGeom.getFactory();
-	  if (inputGeom instanceof Point$1) { return this.transformPoint(inputGeom, null) }
-	  if (inputGeom instanceof MultiPoint) { return this.transformMultiPoint(inputGeom, null) }
-	  if (inputGeom instanceof LinearRing) { return this.transformLinearRing(inputGeom, null) }
-	  if (inputGeom instanceof LineString) { return this.transformLineString(inputGeom, null) }
-	  if (inputGeom instanceof MultiLineString) { return this.transformMultiLineString(inputGeom, null) }
-	  if (inputGeom instanceof Polygon) { return this.transformPolygon(inputGeom, null) }
-	  if (inputGeom instanceof MultiPolygon) { return this.transformMultiPolygon(inputGeom, null) }
-	  if (inputGeom instanceof GeometryCollection) { return this.transformGeometryCollection(inputGeom, null) }
-	  throw new IllegalArgumentException('Unknown Geometry subtype: ' + inputGeom.getClass().getName())
-	};
-	GeometryTransformer.prototype.transformLinearRing = function transformLinearRing (geom, parent) {
-	  var seq = this.transformCoordinates(geom.getCoordinateSequence(), geom);
-	  if (seq === null) { return this._factory.createLinearRing(null) }
-	  var seqSize = seq.size();
-	  if (seqSize > 0 && seqSize < 4 && !this._preserveType) { return this._factory.createLineString(seq) }
-	  return this._factory.createLinearRing(seq)
-	};
-	GeometryTransformer.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryTransformer.prototype.getClass = function getClass () {
-	  return GeometryTransformer
-	};
 
-	var LineStringSnapper = function LineStringSnapper () {
-	  this._snapTolerance = 0.0;
-	  this._srcPts = null;
-	  this._seg = new LineSegment();
-	  this._allowSnappingToSourceVertices = false;
-	  this._isClosed = false;
-	  if (arguments[0] instanceof LineString && typeof arguments[1] === 'number') {
-	    var srcLine = arguments[0];
-	    var snapTolerance = arguments[1];
-	    LineStringSnapper.call(this, srcLine.getCoordinates(), snapTolerance);
-	  } else if (arguments[0] instanceof Array && typeof arguments[1] === 'number') {
-	    var srcPts = arguments[0];
-	    var snapTolerance$1 = arguments[1];
-	    this._srcPts = srcPts;
-	    this._isClosed = LineStringSnapper.isClosed(srcPts);
-	    this._snapTolerance = snapTolerance$1;
-	  }
-	};
-	LineStringSnapper.prototype.snapVertices = function snapVertices (srcCoords, snapPts) {
-	    var this$1 = this;
+	  function changeTags(_, changed, onInput) {
+	    if (changed.hasOwnProperty('comment')) {
+	      if (changed.comment === undefined) {
+	        changed.comment = '';
+	      }
 
-	  var end = this._isClosed ? srcCoords.size() - 1 : srcCoords.size();
-	  for (var i = 0; i < end; i++) {
-	    var srcPt = srcCoords.get(i);
-	    var snapVert = this$1.findSnapForVertex(srcPt, snapPts);
-	    if (snapVert !== null) {
-	      srcCoords.set(i, new Coordinate(snapVert));
-	      if (i === 0 && this$1._isClosed) { srcCoords.set(srcCoords.size() - 1, new Coordinate(snapVert)); }
+	      if (!onInput) {
+	        corePreferences('comment', changed.comment);
+	        corePreferences('commentDate', Date.now());
+	      }
 	    }
-	  }
-	};
-	LineStringSnapper.prototype.findSnapForVertex = function findSnapForVertex (pt, snapPts) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < snapPts.length; i++) {
-	    if (pt.equals2D(snapPts[i])) { return null }
-	    if (pt.distance(snapPts[i]) < this$1._snapTolerance) { return snapPts[i] }
-	  }
-	  return null
-	};
-	LineStringSnapper.prototype.snapTo = function snapTo (snapPts) {
-	  var coordList = new CoordinateList(this._srcPts);
-	  this.snapVertices(coordList, snapPts);
-	  this.snapSegments(coordList, snapPts);
-	  var newPts = coordList.toCoordinateArray();
-	  return newPts
-	};
-	LineStringSnapper.prototype.snapSegments = function snapSegments (srcCoords, snapPts) {
-	    var this$1 = this;
+	    if (changed.hasOwnProperty('source')) {
+	      if (changed.source === undefined) {
+	        corePreferences('source', null);
+	      } else if (!onInput) {
+	        corePreferences('source', changed.source);
+	        corePreferences('commentDate', Date.now());
+	      }
+	    } // no need to update `prefs` for `hashtags` here since it's done in `updateChangeset`
+
 
-	  if (snapPts.length === 0) { return null }
-	  var distinctPtCount = snapPts.length;
-	  if (snapPts[0].equals2D(snapPts[snapPts.length - 1])) { distinctPtCount = snapPts.length - 1; }
-	  for (var i = 0; i < distinctPtCount; i++) {
-	    var snapPt = snapPts[i];
-	    var index = this$1.findSegmentIndexToSnap(snapPt, srcCoords);
-	    if (index >= 0) {
-	      srcCoords.add(index + 1, new Coordinate(snapPt), false);
+	    updateChangeset(changed, onInput);
+
+	    if (_selection) {
+	      _selection.call(render);
 	    }
 	  }
-	};
-	LineStringSnapper.prototype.findSegmentIndexToSnap = function findSegmentIndexToSnap (snapPt, srcCoords) {
-	    var this$1 = this;
 
-	  var minDist = Double.MAX_VALUE;
-	  var snapIndex = -1;
-	  for (var i = 0; i < srcCoords.size() - 1; i++) {
-	    this$1._seg.p0 = srcCoords.get(i);
-	    this$1._seg.p1 = srcCoords.get(i + 1);
-	    if (this$1._seg.p0.equals2D(snapPt) || this$1._seg.p1.equals2D(snapPt)) {
-	      if (this$1._allowSnappingToSourceVertices) { continue; } else { return -1 }
+	  function findHashtags(tags, commentOnly) {
+	    var detectedHashtags = commentHashtags();
+
+	    if (detectedHashtags.length) {
+	      // always remove stored hashtags if there are hashtags in the comment - #4304
+	      corePreferences('hashtags', null);
 	    }
-	    var dist = this$1._seg.distance(snapPt);
-	    if (dist < this$1._snapTolerance && dist < minDist) {
-	      minDist = dist;
-	      snapIndex = i;
+
+	    if (!detectedHashtags.length || !commentOnly) {
+	      detectedHashtags = detectedHashtags.concat(hashtagHashtags());
 	    }
-	  }
-	  return snapIndex
-	};
-	LineStringSnapper.prototype.setAllowSnappingToSourceVertices = function setAllowSnappingToSourceVertices (allowSnappingToSourceVertices) {
-	  this._allowSnappingToSourceVertices = allowSnappingToSourceVertices;
-	};
-	LineStringSnapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	LineStringSnapper.prototype.getClass = function getClass () {
-	  return LineStringSnapper
-	};
-	LineStringSnapper.isClosed = function isClosed (pts) {
-	  if (pts.length <= 1) { return false }
-	  return pts[0].equals2D(pts[pts.length - 1])
-	};
 
-	var GeometrySnapper = function GeometrySnapper (srcGeom) {
-	  this._srcGeom = srcGeom || null;
-	};
+	    var allLowerCase = new Set();
+	    return detectedHashtags.filter(function (hashtag) {
+	      // Compare tags as lowercase strings, but keep original case tags
+	      var lowerCase = hashtag.toLowerCase();
 
-	var staticAccessors$41 = { SNAP_PRECISION_FACTOR: { configurable: true } };
-	GeometrySnapper.prototype.snapTo = function snapTo (snapGeom, snapTolerance) {
-	  var snapPts = this.extractTargetCoordinates(snapGeom);
-	  var snapTrans = new SnapTransformer(snapTolerance, snapPts);
-	  return snapTrans.transform(this._srcGeom)
-	};
-	GeometrySnapper.prototype.snapToSelf = function snapToSelf (snapTolerance, cleanResult) {
-	  var snapPts = this.extractTargetCoordinates(this._srcGeom);
-	  var snapTrans = new SnapTransformer(snapTolerance, snapPts, true);
-	  var snappedGeom = snapTrans.transform(this._srcGeom);
-	  var result = snappedGeom;
-	  if (cleanResult && hasInterface(result, Polygonal)) {
-	    result = snappedGeom.buffer(0);
-	  }
-	  return result
-	};
-	GeometrySnapper.prototype.computeSnapTolerance = function computeSnapTolerance (ringPts) {
-	  var minSegLen = this.computeMinimumSegmentLength(ringPts);
-	  var snapTol = minSegLen / 10;
-	  return snapTol
-	};
-	GeometrySnapper.prototype.extractTargetCoordinates = function extractTargetCoordinates (g) {
-	  var ptSet = new TreeSet();
-	  var pts = g.getCoordinates();
-	  for (var i = 0; i < pts.length; i++) {
-	    ptSet.add(pts[i]);
-	  }
-	  return ptSet.toArray(new Array(0).fill(null))
-	};
-	GeometrySnapper.prototype.computeMinimumSegmentLength = function computeMinimumSegmentLength (pts) {
-	  var minSegLen = Double.MAX_VALUE;
-	  for (var i = 0; i < pts.length - 1; i++) {
-	    var segLen = pts[i].distance(pts[i + 1]);
-	    if (segLen < minSegLen) { minSegLen = segLen; }
-	  }
-	  return minSegLen
-	};
-	GeometrySnapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometrySnapper.prototype.getClass = function getClass () {
-	  return GeometrySnapper
-	};
-	GeometrySnapper.snap = function snap (g0, g1, snapTolerance) {
-	  var snapGeom = new Array(2).fill(null);
-	  var snapper0 = new GeometrySnapper(g0);
-	  snapGeom[0] = snapper0.snapTo(g1, snapTolerance);
-	  var snapper1 = new GeometrySnapper(g1);
-	  snapGeom[1] = snapper1.snapTo(snapGeom[0], snapTolerance);
-	  return snapGeom
-	};
-	GeometrySnapper.computeOverlaySnapTolerance = function computeOverlaySnapTolerance () {
-	  if (arguments.length === 1) {
-	    var g = arguments[0];
-	    var snapTolerance = GeometrySnapper.computeSizeBasedSnapTolerance(g);
-	    var pm = g.getPrecisionModel();
-	    if (pm.getType() === PrecisionModel.FIXED) {
-	      var fixedSnapTol = 1 / pm.getScale() * 2 / 1.415;
-	      if (fixedSnapTol > snapTolerance) { snapTolerance = fixedSnapTol; }
-	    }
-	    return snapTolerance
-	  } else if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    return Math.min(GeometrySnapper.computeOverlaySnapTolerance(g0), GeometrySnapper.computeOverlaySnapTolerance(g1))
-	  }
-	};
-	GeometrySnapper.computeSizeBasedSnapTolerance = function computeSizeBasedSnapTolerance (g) {
-	  var env = g.getEnvelopeInternal();
-	  var minDimension = Math.min(env.getHeight(), env.getWidth());
-	  var snapTol = minDimension * GeometrySnapper.SNAP_PRECISION_FACTOR;
-	  return snapTol
-	};
-	GeometrySnapper.snapToSelf = function snapToSelf (geom, snapTolerance, cleanResult) {
-	  var snapper0 = new GeometrySnapper(geom);
-	  return snapper0.snapToSelf(snapTolerance, cleanResult)
-	};
-	staticAccessors$41.SNAP_PRECISION_FACTOR.get = function () { return 1e-9 };
+	      if (!allLowerCase.has(lowerCase)) {
+	        allLowerCase.add(lowerCase);
+	        return true;
+	      }
 
-	Object.defineProperties( GeometrySnapper, staticAccessors$41 );
+	      return false;
+	    }); // Extract hashtags from `comment`
 
-	var SnapTransformer = (function (GeometryTransformer$$1) {
-	  function SnapTransformer (snapTolerance, snapPts, isSelfSnap) {
-	    GeometryTransformer$$1.call(this);
-	    this._snapTolerance = snapTolerance || null;
-	    this._snapPts = snapPts || null;
-	    this._isSelfSnap = (isSelfSnap !== undefined) ? isSelfSnap : false;
-	  }
+	    function commentHashtags() {
+	      var matches = (tags.comment || '').replace(/http\S*/g, '') // drop anything that looks like a URL - #4289
+	      .match(hashtagRegex);
+	      return matches || [];
+	    } // Extract and clean hashtags from `hashtags`
 
-	  if ( GeometryTransformer$$1 ) { SnapTransformer.__proto__ = GeometryTransformer$$1; }
-	  SnapTransformer.prototype = Object.create( GeometryTransformer$$1 && GeometryTransformer$$1.prototype );
-	  SnapTransformer.prototype.constructor = SnapTransformer;
-	  SnapTransformer.prototype.snapLine = function snapLine (srcPts, snapPts) {
-	    var snapper = new LineStringSnapper(srcPts, this._snapTolerance);
-	    snapper.setAllowSnappingToSourceVertices(this._isSelfSnap);
-	    return snapper.snapTo(snapPts)
-	  };
-	  SnapTransformer.prototype.transformCoordinates = function transformCoordinates (coords, parent) {
-	    var srcPts = coords.toCoordinateArray();
-	    var newPts = this.snapLine(srcPts, this._snapPts);
-	    return this._factory.getCoordinateSequenceFactory().create(newPts)
-	  };
-	  SnapTransformer.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  SnapTransformer.prototype.getClass = function getClass () {
-	    return SnapTransformer
-	  };
 
-	  return SnapTransformer;
-	}(GeometryTransformer));
+	    function hashtagHashtags() {
+	      var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
+	        if (s[0] !== '#') {
+	          s = '#' + s;
+	        } // prepend '#'
 
-	var CommonBits = function CommonBits () {
-	  this._isFirst = true;
-	  this._commonMantissaBitsCount = 53;
-	  this._commonBits = 0;
-	  this._commonSignExp = null;
-	};
-	CommonBits.prototype.getCommon = function getCommon () {
-	  return Double.longBitsToDouble(this._commonBits)
-	};
-	CommonBits.prototype.add = function add (num) {
-	  var numBits = Double.doubleToLongBits(num);
-	  if (this._isFirst) {
-	    this._commonBits = numBits;
-	    this._commonSignExp = CommonBits.signExpBits(this._commonBits);
-	    this._isFirst = false;
-	    return null
-	  }
-	  var numSignExp = CommonBits.signExpBits(numBits);
-	  if (numSignExp !== this._commonSignExp) {
-	    this._commonBits = 0;
-	    return null
-	  }
-	  this._commonMantissaBitsCount = CommonBits.numCommonMostSigMantissaBits(this._commonBits, numBits);
-	  this._commonBits = CommonBits.zeroLowerBits(this._commonBits, 64 - (12 + this._commonMantissaBitsCount));
-	};
-	CommonBits.prototype.toString = function toString () {
-	  if (arguments.length === 1) {
-	    var bits = arguments[0];
-	    var x = Double.longBitsToDouble(bits);
-	    var numStr = Double.toBinaryString(bits);
-	    var padStr = '0000000000000000000000000000000000000000000000000000000000000000' + numStr;
-	    var bitStr = padStr.substring(padStr.length - 64);
-	    var str = bitStr.substring(0, 1) + '  ' + bitStr.substring(1, 12) + '(exp) ' + bitStr.substring(12) + ' [ ' + x + ' ]';
-	    return str
+
+	        var matched = s.match(hashtagRegex);
+	        return matched && matched[0];
+	      }).filter(Boolean); // exclude falsy
+
+	      return matches || [];
+	    }
 	  }
-	};
-	CommonBits.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CommonBits.prototype.getClass = function getClass () {
-	  return CommonBits
-	};
-	CommonBits.getBit = function getBit (bits, i) {
-	  var mask = 1 << i;
-	  return (bits & mask) !== 0 ? 1 : 0
-	};
-	CommonBits.signExpBits = function signExpBits (num) {
-	  return num >> 52
-	};
-	CommonBits.zeroLowerBits = function zeroLowerBits (bits, nBits) {
-	  var invMask = (1 << nBits) - 1;
-	  var mask = ~invMask;
-	  var zeroed = bits & mask;
-	  return zeroed
-	};
-	CommonBits.numCommonMostSigMantissaBits = function numCommonMostSigMantissaBits (num1, num2) {
-	  var count = 0;
-	  for (var i = 52; i >= 0; i--) {
-	    if (CommonBits.getBit(num1, i) !== CommonBits.getBit(num2, i)) { return count }
-	    count++;
+
+	  function isReviewRequested(tags) {
+	    var rr = tags.review_requested;
+	    if (rr === undefined) return false;
+	    rr = rr.trim().toLowerCase();
+	    return !(rr === '' || rr === 'no');
 	  }
-	  return 52
-	};
 
-	var CommonBitsRemover = function CommonBitsRemover () {
-	  this._commonCoord = null;
-	  this._ccFilter = new CommonCoordinateFilter();
-	};
+	  function updateChangeset(changed, onInput) {
+	    var tags = Object.assign({}, context.changeset.tags); // shallow copy
 
-	var staticAccessors$42 = { CommonCoordinateFilter: { configurable: true },Translater: { configurable: true } };
-	CommonBitsRemover.prototype.addCommonBits = function addCommonBits (geom) {
-	  var trans = new Translater(this._commonCoord);
-	  geom.apply(trans);
-	  geom.geometryChanged();
-	};
-	CommonBitsRemover.prototype.removeCommonBits = function removeCommonBits (geom) {
-	  if (this._commonCoord.x === 0.0 && this._commonCoord.y === 0.0) { return geom }
-	  var invCoord = new Coordinate(this._commonCoord);
-	  invCoord.x = -invCoord.x;
-	  invCoord.y = -invCoord.y;
-	  var trans = new Translater(invCoord);
-	  geom.apply(trans);
-	  geom.geometryChanged();
-	  return geom
-	};
-	CommonBitsRemover.prototype.getCommonCoordinate = function getCommonCoordinate () {
-	  return this._commonCoord
-	};
-	CommonBitsRemover.prototype.add = function add (geom) {
-	  geom.apply(this._ccFilter);
-	  this._commonCoord = this._ccFilter.getCommonCoordinate();
-	};
-	CommonBitsRemover.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CommonBitsRemover.prototype.getClass = function getClass () {
-	  return CommonBitsRemover
-	};
-	staticAccessors$42.CommonCoordinateFilter.get = function () { return CommonCoordinateFilter };
-	staticAccessors$42.Translater.get = function () { return Translater };
+	    Object.keys(changed).forEach(function (k) {
+	      var v = changed[k];
+	      k = context.cleanTagKey(k);
+	      if (readOnlyTags.indexOf(k) !== -1) return;
 
-	Object.defineProperties( CommonBitsRemover, staticAccessors$42 );
+	      if (v === undefined) {
+	        delete tags[k];
+	      } else if (onInput) {
+	        tags[k] = v;
+	      } else {
+	        tags[k] = context.cleanTagValue(v);
+	      }
+	    });
 
-	var CommonCoordinateFilter = function CommonCoordinateFilter () {
-	  this._commonBitsX = new CommonBits();
-	  this._commonBitsY = new CommonBits();
-	};
-	CommonCoordinateFilter.prototype.filter = function filter (coord) {
-	  this._commonBitsX.add(coord.x);
-	  this._commonBitsY.add(coord.y);
-	};
-	CommonCoordinateFilter.prototype.getCommonCoordinate = function getCommonCoordinate () {
-	  return new Coordinate(this._commonBitsX.getCommon(), this._commonBitsY.getCommon())
-	};
-	CommonCoordinateFilter.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateFilter]
-	};
-	CommonCoordinateFilter.prototype.getClass = function getClass () {
-	  return CommonCoordinateFilter
-	};
+	    if (!onInput) {
+	      // when changing the comment, override hashtags with any found in comment.
+	      var commentOnly = changed.hasOwnProperty('comment') && changed.comment !== '';
+	      var arr = findHashtags(tags, commentOnly);
 
-	var Translater = function Translater () {
-	  this.trans = null;
-	  var trans = arguments[0];
-	  this.trans = trans;
-	};
-	Translater.prototype.filter = function filter (seq, i) {
-	  var xp = seq.getOrdinate(i, 0) + this.trans.x;
-	  var yp = seq.getOrdinate(i, 1) + this.trans.y;
-	  seq.setOrdinate(i, 0, xp);
-	  seq.setOrdinate(i, 1, yp);
-	};
-	Translater.prototype.isDone = function isDone () {
-	  return false
-	};
-	Translater.prototype.isGeometryChanged = function isGeometryChanged () {
-	  return true
-	};
-	Translater.prototype.interfaces_ = function interfaces_ () {
-	  return [CoordinateSequenceFilter]
-	};
-	Translater.prototype.getClass = function getClass () {
-	  return Translater
-	};
+	      if (arr.length) {
+	        tags.hashtags = context.cleanTagValue(arr.join(';'));
+	        corePreferences('hashtags', tags.hashtags);
+	      } else {
+	        delete tags.hashtags;
+	        corePreferences('hashtags', null);
+	      }
+	    } // always update userdetails, just in case user reauthenticates as someone else
 
-	var SnapOverlayOp = function SnapOverlayOp (g1, g2) {
-	  this._geom = new Array(2).fill(null);
-	  this._snapTolerance = null;
-	  this._cbr = null;
-	  this._geom[0] = g1;
-	  this._geom[1] = g2;
-	  this.computeSnapTolerance();
-	};
-	SnapOverlayOp.prototype.selfSnap = function selfSnap (geom) {
-	  var snapper0 = new GeometrySnapper(geom);
-	  var snapGeom = snapper0.snapTo(geom, this._snapTolerance);
-	  return snapGeom
-	};
-	SnapOverlayOp.prototype.removeCommonBits = function removeCommonBits (geom) {
-	  this._cbr = new CommonBitsRemover();
-	  this._cbr.add(geom[0]);
-	  this._cbr.add(geom[1]);
-	  var remGeom = new Array(2).fill(null);
-	  remGeom[0] = this._cbr.removeCommonBits(geom[0].copy());
-	  remGeom[1] = this._cbr.removeCommonBits(geom[1].copy());
-	  return remGeom
-	};
-	SnapOverlayOp.prototype.prepareResult = function prepareResult (geom) {
-	  this._cbr.addCommonBits(geom);
-	  return geom
-	};
-	SnapOverlayOp.prototype.getResultGeometry = function getResultGeometry (opCode) {
-	  var prepGeom = this.snap(this._geom);
-	  var result = OverlayOp.overlayOp(prepGeom[0], prepGeom[1], opCode);
-	  return this.prepareResult(result)
-	};
-	SnapOverlayOp.prototype.checkValid = function checkValid (g) {
-	  if (!g.isValid()) {
-	    System.out.println('Snapped geometry is invalid');
-	  }
-	};
-	SnapOverlayOp.prototype.computeSnapTolerance = function computeSnapTolerance () {
-	  this._snapTolerance = GeometrySnapper.computeOverlaySnapTolerance(this._geom[0], this._geom[1]);
-	};
-	SnapOverlayOp.prototype.snap = function snap (geom) {
-	  var remGeom = this.removeCommonBits(geom);
-	  var snapGeom = GeometrySnapper.snap(remGeom[0], remGeom[1], this._snapTolerance);
-	  return snapGeom
-	};
-	SnapOverlayOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SnapOverlayOp.prototype.getClass = function getClass () {
-	  return SnapOverlayOp
-	};
-	SnapOverlayOp.overlayOp = function overlayOp (g0, g1, opCode) {
-	  var op = new SnapOverlayOp(g0, g1);
-	  return op.getResultGeometry(opCode)
-	};
-	SnapOverlayOp.union = function union (g0, g1) {
-	  return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.UNION)
-	};
-	SnapOverlayOp.intersection = function intersection (g0, g1) {
-	  return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.INTERSECTION)
-	};
-	SnapOverlayOp.symDifference = function symDifference (g0, g1) {
-	  return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.SYMDIFFERENCE)
-	};
-	SnapOverlayOp.difference = function difference (g0, g1) {
-	  return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.DIFFERENCE)
-	};
 
-	var SnapIfNeededOverlayOp = function SnapIfNeededOverlayOp (g1, g2) {
-	  this._geom = new Array(2).fill(null);
-	  this._geom[0] = g1;
-	  this._geom[1] = g2;
-	};
-	SnapIfNeededOverlayOp.prototype.getResultGeometry = function getResultGeometry (opCode) {
-	  var result = null;
-	  var isSuccess = false;
-	  var savedException = null;
-	  try {
-	    result = OverlayOp.overlayOp(this._geom[0], this._geom[1], opCode);
-	    var isValid = true;
-	    if (isValid) { isSuccess = true; }
-	  } catch (ex) {
-	    if (ex instanceof RuntimeException) {
-	      savedException = ex;
-	    } else { throw ex }
-	  } finally {}
-	  if (!isSuccess) {
-	    try {
-	      result = SnapOverlayOp.overlayOp(this._geom[0], this._geom[1], opCode);
-	    } catch (ex$1) {
-	      if (ex$1 instanceof RuntimeException) {
-	        throw savedException
-	      } else { throw ex$1 }
-	    } finally {}
-	  }
-	  return result
-	};
-	SnapIfNeededOverlayOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SnapIfNeededOverlayOp.prototype.getClass = function getClass () {
-	  return SnapIfNeededOverlayOp
-	};
-	SnapIfNeededOverlayOp.overlayOp = function overlayOp (g0, g1, opCode) {
-	  var op = new SnapIfNeededOverlayOp(g0, g1);
-	  return op.getResultGeometry(opCode)
-	};
-	SnapIfNeededOverlayOp.union = function union (g0, g1) {
-	  return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.UNION)
-	};
-	SnapIfNeededOverlayOp.intersection = function intersection (g0, g1) {
-	  return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.INTERSECTION)
-	};
-	SnapIfNeededOverlayOp.symDifference = function symDifference (g0, g1) {
-	  return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.SYMDIFFERENCE)
-	};
-	SnapIfNeededOverlayOp.difference = function difference (g0, g1) {
-	  return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.DIFFERENCE)
-	};
+	    if (_userDetails && _userDetails.changesets_count !== undefined) {
+	      var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1; // #4283
 
-	var MonotoneChain$2 = function MonotoneChain () {
-	  this.mce = null;
-	  this.chainIndex = null;
-	  var mce = arguments[0];
-	  var chainIndex = arguments[1];
-	  this.mce = mce;
-	  this.chainIndex = chainIndex;
-	};
-	MonotoneChain$2.prototype.computeIntersections = function computeIntersections (mc, si) {
-	  this.mce.computeIntersectsForChain(this.chainIndex, mc.mce, mc.chainIndex, si);
-	};
-	MonotoneChain$2.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	MonotoneChain$2.prototype.getClass = function getClass () {
-	  return MonotoneChain$2
-	};
+	      tags.changesets_count = String(changesetsCount); // first 100 edits - new user
 
-	var SweepLineEvent = function SweepLineEvent () {
-	  this._label = null;
-	  this._xValue = null;
-	  this._eventType = null;
-	  this._insertEvent = null;
-	  this._deleteEventIndex = null;
-	  this._obj = null;
-	  if (arguments.length === 2) {
-	    var x = arguments[0];
-	    var insertEvent = arguments[1];
-	    this._eventType = SweepLineEvent.DELETE;
-	    this._xValue = x;
-	    this._insertEvent = insertEvent;
-	  } else if (arguments.length === 3) {
-	    var label = arguments[0];
-	    var x$1 = arguments[1];
-	    var obj = arguments[2];
-	    this._eventType = SweepLineEvent.INSERT;
-	    this._label = label;
-	    this._xValue = x$1;
-	    this._obj = obj;
-	  }
-	};
+	      if (changesetsCount <= 100) {
+	        var s;
+	        s = corePreferences('walkthrough_completed');
 
-	var staticAccessors$43 = { INSERT: { configurable: true },DELETE: { configurable: true } };
-	SweepLineEvent.prototype.isDelete = function isDelete () {
-	  return this._eventType === SweepLineEvent.DELETE
-	};
-	SweepLineEvent.prototype.setDeleteEventIndex = function setDeleteEventIndex (deleteEventIndex) {
-	  this._deleteEventIndex = deleteEventIndex;
-	};
-	SweepLineEvent.prototype.getObject = function getObject () {
-	  return this._obj
-	};
-	SweepLineEvent.prototype.compareTo = function compareTo (o) {
-	  var pe = o;
-	  if (this._xValue < pe._xValue) { return -1 }
-	  if (this._xValue > pe._xValue) { return 1 }
-	  if (this._eventType < pe._eventType) { return -1 }
-	  if (this._eventType > pe._eventType) { return 1 }
-	  return 0
-	};
-	SweepLineEvent.prototype.getInsertEvent = function getInsertEvent () {
-	  return this._insertEvent
-	};
-	SweepLineEvent.prototype.isInsert = function isInsert () {
-	  return this._eventType === SweepLineEvent.INSERT
-	};
-	SweepLineEvent.prototype.isSameLabel = function isSameLabel (ev) {
-	  if (this._label === null) { return false }
-	  return this._label === ev._label
-	};
-	SweepLineEvent.prototype.getDeleteEventIndex = function getDeleteEventIndex () {
-	  return this._deleteEventIndex
-	};
-	SweepLineEvent.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparable]
-	};
-	SweepLineEvent.prototype.getClass = function getClass () {
-	  return SweepLineEvent
-	};
-	staticAccessors$43.INSERT.get = function () { return 1 };
-	staticAccessors$43.DELETE.get = function () { return 2 };
+	        if (s) {
+	          tags['ideditor:walkthrough_completed'] = s;
+	        }
 
-	Object.defineProperties( SweepLineEvent, staticAccessors$43 );
+	        s = corePreferences('walkthrough_progress');
 
-	var EdgeSetIntersector = function EdgeSetIntersector () {};
+	        if (s) {
+	          tags['ideditor:walkthrough_progress'] = s;
+	        }
 
-	EdgeSetIntersector.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	EdgeSetIntersector.prototype.getClass = function getClass () {
-	  return EdgeSetIntersector
-	};
+	        s = corePreferences('walkthrough_started');
 
-	var SegmentIntersector$2 = function SegmentIntersector () {
-	  this._hasIntersection = false;
-	  this._hasProper = false;
-	  this._hasProperInterior = false;
-	  this._properIntersectionPoint = null;
-	  this._li = null;
-	  this._includeProper = null;
-	  this._recordIsolated = null;
-	  this._isSelfIntersection = null;
-	  this._numIntersections = 0;
-	  this.numTests = 0;
-	  this._bdyNodes = null;
-	  this._isDone = false;
-	  this._isDoneWhenProperInt = false;
-	  var li = arguments[0];
-	  var includeProper = arguments[1];
-	  var recordIsolated = arguments[2];
-	  this._li = li;
-	  this._includeProper = includeProper;
-	  this._recordIsolated = recordIsolated;
-	};
-	SegmentIntersector$2.prototype.isTrivialIntersection = function isTrivialIntersection (e0, segIndex0, e1, segIndex1) {
-	  if (e0 === e1) {
-	    if (this._li.getIntersectionNum() === 1) {
-	      if (SegmentIntersector$2.isAdjacentSegments(segIndex0, segIndex1)) { return true }
-	      if (e0.isClosed()) {
-	        var maxSegIndex = e0.getNumPoints() - 1;
-	        if ((segIndex0 === 0 && segIndex1 === maxSegIndex) ||
-	            (segIndex1 === 0 && segIndex0 === maxSegIndex)) {
-	          return true
+	        if (s) {
+	          tags['ideditor:walkthrough_started'] = s;
 	        }
 	      }
+	    } else {
+	      delete tags.changesets_count;
+	    }
+
+	    if (!fastDeepEqual(context.changeset.tags, tags)) {
+	      context.changeset = context.changeset.update({
+	        tags: tags
+	      });
 	    }
 	  }
-	  return false
-	};
-	SegmentIntersector$2.prototype.getProperIntersectionPoint = function getProperIntersectionPoint () {
-	  return this._properIntersectionPoint
-	};
-	SegmentIntersector$2.prototype.setIsDoneIfProperInt = function setIsDoneIfProperInt (isDoneWhenProperInt) {
-	  this._isDoneWhenProperInt = isDoneWhenProperInt;
-	};
-	SegmentIntersector$2.prototype.hasProperInteriorIntersection = function hasProperInteriorIntersection () {
-	  return this._hasProperInterior
-	};
-	SegmentIntersector$2.prototype.isBoundaryPointInternal = function isBoundaryPointInternal (li, bdyNodes) {
-	  for (var i = bdyNodes.iterator(); i.hasNext();) {
-	    var node = i.next();
-	    var pt = node.getCoordinate();
-	    if (li.isIntersection(pt)) { return true }
-	  }
-	  return false
-	};
-	SegmentIntersector$2.prototype.hasProperIntersection = function hasProperIntersection () {
-	  return this._hasProper
-	};
-	SegmentIntersector$2.prototype.hasIntersection = function hasIntersection () {
-	  return this._hasIntersection
-	};
-	SegmentIntersector$2.prototype.isDone = function isDone () {
-	  return this._isDone
-	};
-	SegmentIntersector$2.prototype.isBoundaryPoint = function isBoundaryPoint (li, bdyNodes) {
-	  if (bdyNodes === null) { return false }
-	  if (this.isBoundaryPointInternal(li, bdyNodes[0])) { return true }
-	  if (this.isBoundaryPointInternal(li, bdyNodes[1])) { return true }
-	  return false
+
+	  commit.reset = function () {
+	    context.changeset = null;
+	  };
+
+	  return utilRebind(commit, dispatch$1, 'on');
+	}
+
+	var globalIsFinite = global_1.isFinite;
+
+	// `Number.isFinite` method
+	// https://tc39.github.io/ecma262/#sec-number.isfinite
+	var numberIsFinite = Number.isFinite || function isFinite(it) {
+	  return typeof it == 'number' && globalIsFinite(it);
 	};
-	SegmentIntersector$2.prototype.setBoundaryNodes = function setBoundaryNodes (bdyNodes0, bdyNodes1) {
-	  this._bdyNodes = new Array(2).fill(null);
-	  this._bdyNodes[0] = bdyNodes0;
-	  this._bdyNodes[1] = bdyNodes1;
+
+	// `Number.isFinite` method
+	// https://tc39.github.io/ecma262/#sec-number.isfinite
+	_export({ target: 'Number', stat: true }, { isFinite: numberIsFinite });
+
+	var RADIUS = 6378137;
+	var FLATTENING = 1 / 298.257223563;
+	var POLAR_RADIUS$1 = 6356752.3142;
+	var wgs84 = {
+	  RADIUS: RADIUS,
+	  FLATTENING: FLATTENING,
+	  POLAR_RADIUS: POLAR_RADIUS$1
 	};
-	SegmentIntersector$2.prototype.addIntersections = function addIntersections (e0, segIndex0, e1, segIndex1) {
-	  if (e0 === e1 && segIndex0 === segIndex1) { return null }
-	  this.numTests++;
-	  var p00 = e0.getCoordinates()[segIndex0];
-	  var p01 = e0.getCoordinates()[segIndex0 + 1];
-	  var p10 = e1.getCoordinates()[segIndex1];
-	  var p11 = e1.getCoordinates()[segIndex1 + 1];
-	  this._li.computeIntersection(p00, p01, p10, p11);
-	  if (this._li.hasIntersection()) {
-	    if (this._recordIsolated) {
-	      e0.setIsolated(false);
-	      e1.setIsolated(false);
-	    }
-	    this._numIntersections++;
-	    if (!this.isTrivialIntersection(e0, segIndex0, e1, segIndex1)) {
-	      this._hasIntersection = true;
-	      if (this._includeProper || !this._li.isProper()) {
-	        e0.addIntersections(this._li, segIndex0, 0);
-	        e1.addIntersections(this._li, segIndex1, 1);
-	      }
-	      if (this._li.isProper()) {
-	        this._properIntersectionPoint = this._li.getIntersection(0).copy();
-	        this._hasProper = true;
-	        if (this._isDoneWhenProperInt) {
-	          this._isDone = true;
-	        }
-	        if (!this.isBoundaryPoint(this._li, this._bdyNodes)) { this._hasProperInterior = true; }
+
+	var geometry_1 = geometry;
+	var ring = ringArea;
+
+	function geometry(_) {
+	  var area = 0,
+	      i;
+
+	  switch (_.type) {
+	    case 'Polygon':
+	      return polygonArea(_.coordinates);
+
+	    case 'MultiPolygon':
+	      for (i = 0; i < _.coordinates.length; i++) {
+	        area += polygonArea(_.coordinates[i]);
 	      }
-	    }
+
+	      return area;
+
+	    case 'Point':
+	    case 'MultiPoint':
+	    case 'LineString':
+	    case 'MultiLineString':
+	      return 0;
+
+	    case 'GeometryCollection':
+	      for (i = 0; i < _.geometries.length; i++) {
+	        area += geometry(_.geometries[i]);
+	      }
+
+	      return area;
 	  }
-	};
-	SegmentIntersector$2.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SegmentIntersector$2.prototype.getClass = function getClass () {
-	  return SegmentIntersector$2
-	};
-	SegmentIntersector$2.isAdjacentSegments = function isAdjacentSegments (i1, i2) {
-	  return Math.abs(i1 - i2) === 1
-	};
+	}
+
+	function polygonArea(coords) {
+	  var area = 0;
 
-	var SimpleMCSweepLineIntersector = (function (EdgeSetIntersector$$1) {
-	  function SimpleMCSweepLineIntersector () {
-	    EdgeSetIntersector$$1.call(this);
-	    this.events = new ArrayList();
-	    this.nOverlaps = null;
+	  if (coords && coords.length > 0) {
+	    area += Math.abs(ringArea(coords[0]));
+
+	    for (var i = 1; i < coords.length; i++) {
+	      area -= Math.abs(ringArea(coords[i]));
+	    }
 	  }
 
-	  if ( EdgeSetIntersector$$1 ) { SimpleMCSweepLineIntersector.__proto__ = EdgeSetIntersector$$1; }
-	  SimpleMCSweepLineIntersector.prototype = Object.create( EdgeSetIntersector$$1 && EdgeSetIntersector$$1.prototype );
-	  SimpleMCSweepLineIntersector.prototype.constructor = SimpleMCSweepLineIntersector;
-	  SimpleMCSweepLineIntersector.prototype.prepareEvents = function prepareEvents () {
-	    var this$1 = this;
+	  return area;
+	}
+	/**
+	 * Calculate the approximate area of the polygon were it projected onto
+	 *     the earth.  Note that this area will be positive if ring is oriented
+	 *     clockwise, otherwise it will be negative.
+	 *
+	 * Reference:
+	 * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
+	 *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
+	 *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
+	 *
+	 * Returns:
+	 * {float} The approximate signed geodesic area of the polygon in square
+	 *     meters.
+	 */
 
-	    Collections.sort(this.events);
-	    for (var i = 0; i < this.events.size(); i++) {
-	      var ev = this$1.events.get(i);
-	      if (ev.isDelete()) {
-	        ev.getInsertEvent().setDeleteEventIndex(i);
-	      }
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.computeIntersections = function computeIntersections () {
-	    var this$1 = this;
 
-	    if (arguments.length === 1) {
-	      var si = arguments[0];
-	      this.nOverlaps = 0;
-	      this.prepareEvents();
-	      for (var i = 0; i < this.events.size(); i++) {
-	        var ev = this$1.events.get(i);
-	        if (ev.isInsert()) {
-	          this$1.processOverlaps(i, ev.getDeleteEventIndex(), ev, si);
-	        }
-	        if (si.isDone()) {
-	          break
-	        }
-	      }
-	    } else if (arguments.length === 3) {
-	      if (arguments[2] instanceof SegmentIntersector$2 && (hasInterface(arguments[0], List) && hasInterface(arguments[1], List))) {
-	        var edges0 = arguments[0];
-	        var edges1 = arguments[1];
-	        var si$1 = arguments[2];
-	        this.addEdges(edges0, edges0);
-	        this.addEdges(edges1, edges1);
-	        this.computeIntersections(si$1);
-	      } else if (typeof arguments[2] === 'boolean' && (hasInterface(arguments[0], List) && arguments[1] instanceof SegmentIntersector$2)) {
-	        var edges = arguments[0];
-	        var si$2 = arguments[1];
-	        var testAllSegments = arguments[2];
-	        if (testAllSegments) { this.addEdges(edges, null); } else { this.addEdges(edges); }
-	        this.computeIntersections(si$2);
+	function ringArea(coords) {
+	  var p1,
+	      p2,
+	      p3,
+	      lowerIndex,
+	      middleIndex,
+	      upperIndex,
+	      i,
+	      area = 0,
+	      coordsLength = coords.length;
+
+	  if (coordsLength > 2) {
+	    for (i = 0; i < coordsLength; i++) {
+	      if (i === coordsLength - 2) {
+	        // i = N-2
+	        lowerIndex = coordsLength - 2;
+	        middleIndex = coordsLength - 1;
+	        upperIndex = 0;
+	      } else if (i === coordsLength - 1) {
+	        // i = N-1
+	        lowerIndex = coordsLength - 1;
+	        middleIndex = 0;
+	        upperIndex = 1;
+	      } else {
+	        // i = 0 to N-3
+	        lowerIndex = i;
+	        middleIndex = i + 1;
+	        upperIndex = i + 2;
 	      }
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.addEdge = function addEdge (edge, edgeSet) {
-	    var this$1 = this;
 
-	    var mce = edge.getMonotoneChainEdge();
-	    var startIndex = mce.getStartIndexes();
-	    for (var i = 0; i < startIndex.length - 1; i++) {
-	      var mc = new MonotoneChain$2(mce, i);
-	      var insertEvent = new SweepLineEvent(edgeSet, mce.getMinX(i), mc);
-	      this$1.events.add(insertEvent);
-	      this$1.events.add(new SweepLineEvent(mce.getMaxX(i), insertEvent));
+	      p1 = coords[lowerIndex];
+	      p2 = coords[middleIndex];
+	      p3 = coords[upperIndex];
+	      area += (rad(p3[0]) - rad(p1[0])) * Math.sin(rad(p2[1]));
 	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.processOverlaps = function processOverlaps (start, end, ev0, si) {
-	    var this$1 = this;
 
-	    var mc0 = ev0.getObject();
-	    for (var i = start; i < end; i++) {
-	      var ev1 = this$1.events.get(i);
-	      if (ev1.isInsert()) {
-	        var mc1 = ev1.getObject();
-	        if (!ev0.isSameLabel(ev1)) {
-	          mc0.computeIntersections(mc1, si);
-	          this$1.nOverlaps++;
-	        }
-	      }
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.addEdges = function addEdges () {
-	    var this$1 = this;
+	    area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
+	  }
 
-	    if (arguments.length === 1) {
-	      var edges = arguments[0];
-	      for (var i = edges.iterator(); i.hasNext();) {
-	        var edge = i.next();
-	        this$1.addEdge(edge, edge);
-	      }
-	    } else if (arguments.length === 2) {
-	      var edges$1 = arguments[0];
-	      var edgeSet = arguments[1];
-	      for (var i$1 = edges$1.iterator(); i$1.hasNext();) {
-	        var edge$1 = i$1.next();
-	        this$1.addEdge(edge$1, edgeSet);
-	      }
-	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  SimpleMCSweepLineIntersector.prototype.getClass = function getClass () {
-	    return SimpleMCSweepLineIntersector
-	  };
+	  return area;
+	}
 
-	  return SimpleMCSweepLineIntersector;
-	}(EdgeSetIntersector));
+	function rad(_) {
+	  return _ * Math.PI / 180;
+	}
 
-	var IntervalRTreeNode = function IntervalRTreeNode () {
-	  this._min = Double.POSITIVE_INFINITY;
-	  this._max = Double.NEGATIVE_INFINITY;
+	var geojsonArea = {
+	  geometry: geometry_1,
+	  ring: ring
 	};
 
-	var staticAccessors$45 = { NodeComparator: { configurable: true } };
-	IntervalRTreeNode.prototype.getMin = function getMin () {
-	  return this._min
-	};
-	IntervalRTreeNode.prototype.intersects = function intersects (queryMin, queryMax) {
-	  if (this._min > queryMax || this._max < queryMin) { return false }
-	  return true
-	};
-	IntervalRTreeNode.prototype.getMax = function getMax () {
-	  return this._max
-	};
-	IntervalRTreeNode.prototype.toString = function toString () {
-	  return WKTWriter.toLineString(new Coordinate(this._min, 0), new Coordinate(this._max, 0))
-	};
-	IntervalRTreeNode.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	IntervalRTreeNode.prototype.getClass = function getClass () {
-	  return IntervalRTreeNode
-	};
-	staticAccessors$45.NodeComparator.get = function () { return NodeComparator };
+	function toRadians(angleInDegrees) {
+	  return angleInDegrees * Math.PI / 180;
+	}
 
-	Object.defineProperties( IntervalRTreeNode, staticAccessors$45 );
+	function toDegrees(angleInRadians) {
+	  return angleInRadians * 180 / Math.PI;
+	}
+
+	function offset(c1, distance, bearing) {
+	  var lat1 = toRadians(c1[1]);
+	  var lon1 = toRadians(c1[0]);
+	  var dByR = distance / 6378137; // distance divided by 6378137 (radius of the earth) wgs84
 
-	var NodeComparator = function NodeComparator () {};
+	  var lat = Math.asin(Math.sin(lat1) * Math.cos(dByR) + Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing));
+	  var lon = lon1 + Math.atan2(Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1), Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat));
+	  return [toDegrees(lon), toDegrees(lat)];
+	}
 
-	NodeComparator.prototype.compare = function compare (o1, o2) {
-	  var n1 = o1;
-	  var n2 = o2;
-	  var mid1 = (n1._min + n1._max) / 2;
-	  var mid2 = (n2._min + n2._max) / 2;
-	  if (mid1 < mid2) { return -1 }
-	  if (mid1 > mid2) { return 1 }
-	  return 0
-	};
-	NodeComparator.prototype.interfaces_ = function interfaces_ () {
-	  return [Comparator]
-	};
-	NodeComparator.prototype.getClass = function getClass () {
-	  return NodeComparator
-	};
+	function validateCenter(center) {
+	  var validCenterLengths = [2, 3];
 
-	var IntervalRTreeLeafNode = (function (IntervalRTreeNode$$1) {
-	  function IntervalRTreeLeafNode () {
-	    IntervalRTreeNode$$1.call(this);
-	    this._item = null;
-	    var min = arguments[0];
-	    var max = arguments[1];
-	    var item = arguments[2];
-	    this._min = min;
-	    this._max = max;
-	    this._item = item;
+	  if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
+	    throw new Error("ERROR! Center has to be an array of length two or three");
 	  }
 
-	  if ( IntervalRTreeNode$$1 ) { IntervalRTreeLeafNode.__proto__ = IntervalRTreeNode$$1; }
-	  IntervalRTreeLeafNode.prototype = Object.create( IntervalRTreeNode$$1 && IntervalRTreeNode$$1.prototype );
-	  IntervalRTreeLeafNode.prototype.constructor = IntervalRTreeLeafNode;
-	  IntervalRTreeLeafNode.prototype.query = function query (queryMin, queryMax, visitor) {
-	    if (!this.intersects(queryMin, queryMax)) { return null }
-	    visitor.visitItem(this._item);
-	  };
-	  IntervalRTreeLeafNode.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  IntervalRTreeLeafNode.prototype.getClass = function getClass () {
-	    return IntervalRTreeLeafNode
-	  };
+	  var _center = _slicedToArray(center, 2),
+	      lng = _center[0],
+	      lat = _center[1];
 
-	  return IntervalRTreeLeafNode;
-	}(IntervalRTreeNode));
+	  if (typeof lng !== "number" || typeof lat !== "number") {
+	    throw new Error("ERROR! Longitude and Latitude has to be numbers but where ".concat(_typeof(lng), " and ").concat(_typeof(lat)));
+	  }
 
-	var IntervalRTreeBranchNode = (function (IntervalRTreeNode$$1) {
-	  function IntervalRTreeBranchNode () {
-	    IntervalRTreeNode$$1.call(this);
-	    this._node1 = null;
-	    this._node2 = null;
-	    var n1 = arguments[0];
-	    var n2 = arguments[1];
-	    this._node1 = n1;
-	    this._node2 = n2;
-	    this.buildExtent(this._node1, this._node2);
+	  if (lng > 180 || lng < -180) {
+	    throw new Error("ERROR! Longitude has to be between -180 and 180 but was ".concat(lng));
 	  }
 
-	  if ( IntervalRTreeNode$$1 ) { IntervalRTreeBranchNode.__proto__ = IntervalRTreeNode$$1; }
-	  IntervalRTreeBranchNode.prototype = Object.create( IntervalRTreeNode$$1 && IntervalRTreeNode$$1.prototype );
-	  IntervalRTreeBranchNode.prototype.constructor = IntervalRTreeBranchNode;
-	  IntervalRTreeBranchNode.prototype.buildExtent = function buildExtent (n1, n2) {
-	    this._min = Math.min(n1._min, n2._min);
-	    this._max = Math.max(n1._max, n2._max);
-	  };
-	  IntervalRTreeBranchNode.prototype.query = function query (queryMin, queryMax, visitor) {
-	    if (!this.intersects(queryMin, queryMax)) {
-	      return null
-	    }
-	    if (this._node1 !== null) { this._node1.query(queryMin, queryMax, visitor); }
-	    if (this._node2 !== null) { this._node2.query(queryMin, queryMax, visitor); }
-	  };
-	  IntervalRTreeBranchNode.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  IntervalRTreeBranchNode.prototype.getClass = function getClass () {
-	    return IntervalRTreeBranchNode
-	  };
+	  if (lat > 90 || lat < -90) {
+	    throw new Error("ERROR! Latitude has to be between -90 and 90 but was ".concat(lat));
+	  }
+	}
 
-	  return IntervalRTreeBranchNode;
-	}(IntervalRTreeNode));
+	function validateRadius(radius) {
+	  if (typeof radius !== "number") {
+	    throw new Error("ERROR! Radius has to be a positive number but was: ".concat(_typeof(radius)));
+	  }
 
-	var SortedPackedIntervalRTree = function SortedPackedIntervalRTree () {
-	  this._leaves = new ArrayList();
-	  this._root = null;
-	  this._level = 0;
-	};
-	SortedPackedIntervalRTree.prototype.buildTree = function buildTree () {
-	    var this$1 = this;
+	  if (radius <= 0) {
+	    throw new Error("ERROR! Radius has to be a positive number but was: ".concat(radius));
+	  }
+	}
 
-	  Collections.sort(this._leaves, new IntervalRTreeNode.NodeComparator());
-	  var src = this._leaves;
-	  var temp = null;
-	  var dest = new ArrayList();
-	  while (true) {
-	    this$1.buildLevel(src, dest);
-	    if (dest.size() === 1) { return dest.get(0) }
-	    temp = src;
-	    src = dest;
-	    dest = temp;
+	function validateNumberOfSegments(numberOfSegments) {
+	  if (typeof numberOfSegments !== "number" && numberOfSegments !== undefined) {
+	    throw new Error("ERROR! Number of segments has to be a number but was: ".concat(_typeof(numberOfSegments)));
 	  }
-	};
-	SortedPackedIntervalRTree.prototype.insert = function insert (min, max, item) {
-	  if (this._root !== null) { throw new Error('Index cannot be added to once it has been queried') }
-	  this._leaves.add(new IntervalRTreeLeafNode(min, max, item));
-	};
-	SortedPackedIntervalRTree.prototype.query = function query (min, max, visitor) {
-	  this.init();
-	  this._root.query(min, max, visitor);
-	};
-	SortedPackedIntervalRTree.prototype.buildRoot = function buildRoot () {
-	  if (this._root !== null) { return null }
-	  this._root = this.buildTree();
-	};
-	SortedPackedIntervalRTree.prototype.printNode = function printNode (node) {
-	  System.out.println(WKTWriter.toLineString(new Coordinate(node._min, this._level), new Coordinate(node._max, this._level)));
-	};
-	SortedPackedIntervalRTree.prototype.init = function init () {
-	  if (this._root !== null) { return null }
-	  this.buildRoot();
-	};
-	SortedPackedIntervalRTree.prototype.buildLevel = function buildLevel (src, dest) {
-	  this._level++;
-	  dest.clear();
-	  for (var i = 0; i < src.size(); i += 2) {
-	    var n1 = src.get(i);
-	    var n2 = i + 1 < src.size() ? src.get(i) : null;
-	    if (n2 === null) {
-	      dest.add(n1);
-	    } else {
-	      var node = new IntervalRTreeBranchNode(src.get(i), src.get(i + 1));
-	      dest.add(node);
-	    }
+
+	  if (numberOfSegments < 3) {
+	    throw new Error("ERROR! Number of segments has to be at least 3 but was: ".concat(numberOfSegments));
 	  }
-	};
-	SortedPackedIntervalRTree.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	SortedPackedIntervalRTree.prototype.getClass = function getClass () {
-	  return SortedPackedIntervalRTree
-	};
+	}
 
-	var ArrayListVisitor = function ArrayListVisitor () {
-	  this._items = new ArrayList();
-	};
-	ArrayListVisitor.prototype.visitItem = function visitItem (item) {
-	  this._items.add(item);
-	};
-	ArrayListVisitor.prototype.getItems = function getItems () {
-	  return this._items
-	};
-	ArrayListVisitor.prototype.interfaces_ = function interfaces_ () {
-	  return [ItemVisitor]
-	};
-	ArrayListVisitor.prototype.getClass = function getClass () {
-	  return ArrayListVisitor
-	};
+	function validateInput(_ref) {
+	  var center = _ref.center,
+	      radius = _ref.radius,
+	      numberOfSegments = _ref.numberOfSegments;
+	  validateCenter(center);
+	  validateRadius(radius);
+	  validateNumberOfSegments(numberOfSegments);
+	}
 
-	var IndexedPointInAreaLocator = function IndexedPointInAreaLocator () {
-	  this._index = null;
-	  var g = arguments[0];
-	  if (!hasInterface(g, Polygonal)) { throw new IllegalArgumentException('Argument must be Polygonal') }
-	  this._index = new IntervalIndexedGeometry(g);
-	};
+	var circleToPolygon = function circleToPolygon(center, radius, numberOfSegments) {
+	  var n = numberOfSegments ? numberOfSegments : 32; // validateInput() throws error on invalid input and do nothing on valid input
 
-	var staticAccessors$44 = { SegmentVisitor: { configurable: true },IntervalIndexedGeometry: { configurable: true } };
-	IndexedPointInAreaLocator.prototype.locate = function locate (p) {
-	  var rcc = new RayCrossingCounter(p);
-	  var visitor = new SegmentVisitor(rcc);
-	  this._index.query(p.y, p.y, visitor);
-	  return rcc.getLocation()
-	};
-	IndexedPointInAreaLocator.prototype.interfaces_ = function interfaces_ () {
-	  return [PointOnGeometryLocator]
-	};
-	IndexedPointInAreaLocator.prototype.getClass = function getClass () {
-	  return IndexedPointInAreaLocator
-	};
-	staticAccessors$44.SegmentVisitor.get = function () { return SegmentVisitor };
-	staticAccessors$44.IntervalIndexedGeometry.get = function () { return IntervalIndexedGeometry };
+	  validateInput({
+	    center: center,
+	    radius: radius,
+	    numberOfSegments: numberOfSegments
+	  });
+	  var coordinates = [];
 
-	Object.defineProperties( IndexedPointInAreaLocator, staticAccessors$44 );
+	  for (var i = 0; i < n; ++i) {
+	    coordinates.push(offset(center, radius, 2 * Math.PI * -i / n));
+	  }
 
-	var SegmentVisitor = function SegmentVisitor () {
-	  this._counter = null;
-	  var counter = arguments[0];
-	  this._counter = counter;
-	};
-	SegmentVisitor.prototype.visitItem = function visitItem (item) {
-	  var seg = item;
-	  this._counter.countSegment(seg.getCoordinate(0), seg.getCoordinate(1));
-	};
-	SegmentVisitor.prototype.interfaces_ = function interfaces_ () {
-	  return [ItemVisitor]
-	};
-	SegmentVisitor.prototype.getClass = function getClass () {
-	  return SegmentVisitor
+	  coordinates.push(coordinates[0]);
+	  return {
+	    type: "Polygon",
+	    coordinates: [coordinates]
+	  };
 	};
 
-	var IntervalIndexedGeometry = function IntervalIndexedGeometry () {
-	  this._index = new SortedPackedIntervalRTree();
-	  var geom = arguments[0];
-	  this.init(geom);
-	};
-	IntervalIndexedGeometry.prototype.init = function init (geom) {
-	    var this$1 = this;
+	// `Number.EPSILON` constant
+	// https://tc39.github.io/ecma262/#sec-number.epsilon
+	_export({ target: 'Number', stat: true }, {
+	  EPSILON: Math.pow(2, -52)
+	});
 
-	  var lines = LinearComponentExtracter.getLines(geom);
-	  for (var i = lines.iterator(); i.hasNext();) {
-	    var line = i.next();
-	    var pts = line.getCoordinates();
-	    this$1.addLine(pts);
-	  }
-	};
-	IntervalIndexedGeometry.prototype.addLine = function addLine (pts) {
-	    var this$1 = this;
+	/**
+	 * splaytree v3.0.1
+	 * Fast Splay tree for Node and browser
+	 *
+	 * @author Alexander Milevski <info@w8r.name>
+	 * @license MIT
+	 * @preserve
+	 */
+	var Node$1 = function Node(key, data) {
+	  _classCallCheck(this, Node);
 
-	  for (var i = 1; i < pts.length; i++) {
-	    var seg = new LineSegment(pts[i - 1], pts[i]);
-	    var min = Math.min(seg.p0.y, seg.p1.y);
-	    var max = Math.max(seg.p0.y, seg.p1.y);
-	    this$1._index.insert(min, max, seg);
-	  }
-	};
-	IntervalIndexedGeometry.prototype.query = function query () {
-	  if (arguments.length === 2) {
-	    var min = arguments[0];
-	    var max = arguments[1];
-	    var visitor = new ArrayListVisitor();
-	    this._index.query(min, max, visitor);
-	    return visitor.getItems()
-	  } else if (arguments.length === 3) {
-	    var min$1 = arguments[0];
-	    var max$1 = arguments[1];
-	    var visitor$1 = arguments[2];
-	    this._index.query(min$1, max$1, visitor$1);
-	  }
-	};
-	IntervalIndexedGeometry.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	IntervalIndexedGeometry.prototype.getClass = function getClass () {
-	  return IntervalIndexedGeometry
+	  this.next = null;
+	  this.key = key;
+	  this.data = data;
+	  this.left = null;
+	  this.right = null;
 	};
+	/* follows "An implementation of top-down splaying"
+	 * by D. Sleator <sleator@cs.cmu.edu> March 1992
+	 */
 
-	var GeometryGraph = (function (PlanarGraph$$1) {
-	  function GeometryGraph () {
-	    PlanarGraph$$1.call(this);
-	    this._parentGeom = null;
-	    this._lineEdgeMap = new HashMap();
-	    this._boundaryNodeRule = null;
-	    this._useBoundaryDeterminationRule = true;
-	    this._argIndex = null;
-	    this._boundaryNodes = null;
-	    this._hasTooFewPoints = false;
-	    this._invalidPoint = null;
-	    this._areaPtLocator = null;
-	    this._ptLocator = new PointLocator();
-	    if (arguments.length === 2) {
-	      var argIndex = arguments[0];
-	      var parentGeom = arguments[1];
-	      var boundaryNodeRule = BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE;
-	      this._argIndex = argIndex;
-	      this._parentGeom = parentGeom;
-	      this._boundaryNodeRule = boundaryNodeRule;
-	      if (parentGeom !== null) {
-	        this.add(parentGeom);
-	      }
-	    } else if (arguments.length === 3) {
-	      var argIndex$1 = arguments[0];
-	      var parentGeom$1 = arguments[1];
-	      var boundaryNodeRule$1 = arguments[2];
-	      this._argIndex = argIndex$1;
-	      this._parentGeom = parentGeom$1;
-	      this._boundaryNodeRule = boundaryNodeRule$1;
-	      if (parentGeom$1 !== null) {
-	        this.add(parentGeom$1);
-	      }
-	    }
-	  }
-
-	  if ( PlanarGraph$$1 ) { GeometryGraph.__proto__ = PlanarGraph$$1; }
-	  GeometryGraph.prototype = Object.create( PlanarGraph$$1 && PlanarGraph$$1.prototype );
-	  GeometryGraph.prototype.constructor = GeometryGraph;
-	  GeometryGraph.prototype.insertBoundaryPoint = function insertBoundaryPoint (argIndex, coord) {
-	    var n = this._nodes.addNode(coord);
-	    var lbl = n.getLabel();
-	    var boundaryCount = 1;
-	    var loc = Location.NONE;
-	    loc = lbl.getLocation(argIndex, Position.ON);
-	    if (loc === Location.BOUNDARY) { boundaryCount++; }
-	    var newLoc = GeometryGraph.determineBoundary(this._boundaryNodeRule, boundaryCount);
-	    lbl.setLocation(argIndex, newLoc);
-	  };
-	  GeometryGraph.prototype.computeSelfNodes = function computeSelfNodes () {
-	    if (arguments.length === 2) {
-	      var li = arguments[0];
-	      var computeRingSelfNodes = arguments[1];
-	      return this.computeSelfNodes(li, computeRingSelfNodes, false)
-	    } else if (arguments.length === 3) {
-	      var li$1 = arguments[0];
-	      var computeRingSelfNodes$1 = arguments[1];
-	      var isDoneIfProperInt = arguments[2];
-	      var si = new SegmentIntersector$2(li$1, true, false);
-	      si.setIsDoneIfProperInt(isDoneIfProperInt);
-	      var esi = this.createEdgeSetIntersector();
-	      var isRings = this._parentGeom instanceof LinearRing || this._parentGeom instanceof Polygon || this._parentGeom instanceof MultiPolygon;
-	      var computeAllSegments = computeRingSelfNodes$1 || !isRings;
-	      esi.computeIntersections(this._edges, si, computeAllSegments);
-	      this.addSelfIntersectionNodes(this._argIndex);
-	      return si
-	    }
-	  };
-	  GeometryGraph.prototype.computeSplitEdges = function computeSplitEdges (edgelist) {
-	    for (var i = this._edges.iterator(); i.hasNext();) {
-	      var e = i.next();
-	      e.eiList.addSplitEdges(edgelist);
-	    }
-	  };
-	  GeometryGraph.prototype.computeEdgeIntersections = function computeEdgeIntersections (g, li, includeProper) {
-	    var si = new SegmentIntersector$2(li, includeProper, true);
-	    si.setBoundaryNodes(this.getBoundaryNodes(), g.getBoundaryNodes());
-	    var esi = this.createEdgeSetIntersector();
-	    esi.computeIntersections(this._edges, g._edges, si);
-	    return si
-	  };
-	  GeometryGraph.prototype.getGeometry = function getGeometry () {
-	    return this._parentGeom
-	  };
-	  GeometryGraph.prototype.getBoundaryNodeRule = function getBoundaryNodeRule () {
-	    return this._boundaryNodeRule
-	  };
-	  GeometryGraph.prototype.hasTooFewPoints = function hasTooFewPoints () {
-	    return this._hasTooFewPoints
-	  };
-	  GeometryGraph.prototype.addPoint = function addPoint () {
-	    if (arguments[0] instanceof Point$1) {
-	      var p = arguments[0];
-	      var coord = p.getCoordinate();
-	      this.insertPoint(this._argIndex, coord, Location.INTERIOR);
-	    } else if (arguments[0] instanceof Coordinate) {
-	      var pt = arguments[0];
-	      this.insertPoint(this._argIndex, pt, Location.INTERIOR);
-	    }
-	  };
-	  GeometryGraph.prototype.addPolygon = function addPolygon (p) {
-	    var this$1 = this;
-
-	    this.addPolygonRing(p.getExteriorRing(), Location.EXTERIOR, Location.INTERIOR);
-	    for (var i = 0; i < p.getNumInteriorRing(); i++) {
-	      var hole = p.getInteriorRingN(i);
-	      this$1.addPolygonRing(hole, Location.INTERIOR, Location.EXTERIOR);
-	    }
-	  };
-	  GeometryGraph.prototype.addEdge = function addEdge (e) {
-	    this.insertEdge(e);
-	    var coord = e.getCoordinates();
-	    this.insertPoint(this._argIndex, coord[0], Location.BOUNDARY);
-	    this.insertPoint(this._argIndex, coord[coord.length - 1], Location.BOUNDARY);
-	  };
-	  GeometryGraph.prototype.addLineString = function addLineString (line) {
-	    var coord = CoordinateArrays.removeRepeatedPoints(line.getCoordinates());
-	    if (coord.length < 2) {
-	      this._hasTooFewPoints = true;
-	      this._invalidPoint = coord[0];
-	      return null
-	    }
-	    var e = new Edge(coord, new Label(this._argIndex, Location.INTERIOR));
-	    this._lineEdgeMap.put(line, e);
-	    this.insertEdge(e);
-	    Assert.isTrue(coord.length >= 2, 'found LineString with single point');
-	    this.insertBoundaryPoint(this._argIndex, coord[0]);
-	    this.insertBoundaryPoint(this._argIndex, coord[coord.length - 1]);
-	  };
-	  GeometryGraph.prototype.getInvalidPoint = function getInvalidPoint () {
-	    return this._invalidPoint
-	  };
-	  GeometryGraph.prototype.getBoundaryPoints = function getBoundaryPoints () {
-	    var coll = this.getBoundaryNodes();
-	    var pts = new Array(coll.size()).fill(null);
-	    var i = 0;
-	    for (var it = coll.iterator(); it.hasNext();) {
-	      var node = it.next();
-	      pts[i++] = node.getCoordinate().copy();
-	    }
-	    return pts
-	  };
-	  GeometryGraph.prototype.getBoundaryNodes = function getBoundaryNodes () {
-	    if (this._boundaryNodes === null) { this._boundaryNodes = this._nodes.getBoundaryNodes(this._argIndex); }
-	    return this._boundaryNodes
-	  };
-	  GeometryGraph.prototype.addSelfIntersectionNode = function addSelfIntersectionNode (argIndex, coord, loc) {
-	    if (this.isBoundaryNode(argIndex, coord)) { return null }
-	    if (loc === Location.BOUNDARY && this._useBoundaryDeterminationRule) { this.insertBoundaryPoint(argIndex, coord); } else { this.insertPoint(argIndex, coord, loc); }
-	  };
-	  GeometryGraph.prototype.addPolygonRing = function addPolygonRing (lr, cwLeft, cwRight) {
-	    if (lr.isEmpty()) { return null }
-	    var coord = CoordinateArrays.removeRepeatedPoints(lr.getCoordinates());
-	    if (coord.length < 4) {
-	      this._hasTooFewPoints = true;
-	      this._invalidPoint = coord[0];
-	      return null
-	    }
-	    var left = cwLeft;
-	    var right = cwRight;
-	    if (CGAlgorithms.isCCW(coord)) {
-	      left = cwRight;
-	      right = cwLeft;
-	    }
-	    var e = new Edge(coord, new Label(this._argIndex, Location.BOUNDARY, left, right));
-	    this._lineEdgeMap.put(lr, e);
-	    this.insertEdge(e);
-	    this.insertPoint(this._argIndex, coord[0], Location.BOUNDARY);
-	  };
-	  GeometryGraph.prototype.insertPoint = function insertPoint (argIndex, coord, onLocation) {
-	    var n = this._nodes.addNode(coord);
-	    var lbl = n.getLabel();
-	    if (lbl === null) {
-	      n._label = new Label(argIndex, onLocation);
-	    } else { lbl.setLocation(argIndex, onLocation); }
-	  };
-	  GeometryGraph.prototype.createEdgeSetIntersector = function createEdgeSetIntersector () {
-	    return new SimpleMCSweepLineIntersector()
-	  };
-	  GeometryGraph.prototype.addSelfIntersectionNodes = function addSelfIntersectionNodes (argIndex) {
-	    var this$1 = this;
-
-	    for (var i = this._edges.iterator(); i.hasNext();) {
-	      var e = i.next();
-	      var eLoc = e.getLabel().getLocation(argIndex);
-	      for (var eiIt = e.eiList.iterator(); eiIt.hasNext();) {
-	        var ei = eiIt.next();
-	        this$1.addSelfIntersectionNode(argIndex, ei.coord, eLoc);
-	      }
-	    }
-	  };
-	  GeometryGraph.prototype.add = function add () {
-	    if (arguments.length === 1) {
-	      var g = arguments[0];
-	      if (g.isEmpty()) { return null }
-	      if (g instanceof MultiPolygon) { this._useBoundaryDeterminationRule = false; }
-	      if (g instanceof Polygon) { this.addPolygon(g); }
-	      else if (g instanceof LineString) { this.addLineString(g); }
-	      else if (g instanceof Point$1) { this.addPoint(g); }
-	      else if (g instanceof MultiPoint) { this.addCollection(g); }
-	      else if (g instanceof MultiLineString) { this.addCollection(g); }
-	      else if (g instanceof MultiPolygon) { this.addCollection(g); }
-	      else if (g instanceof GeometryCollection) { this.addCollection(g); }
-	      else { throw new Error(g.getClass().getName()) }
-	    } else { return PlanarGraph$$1.prototype.add.apply(this, arguments) }
-	  };
-	  GeometryGraph.prototype.addCollection = function addCollection (gc) {
-	    var this$1 = this;
-
-	    for (var i = 0; i < gc.getNumGeometries(); i++) {
-	      var g = gc.getGeometryN(i);
-	      this$1.add(g);
-	    }
-	  };
-	  GeometryGraph.prototype.locate = function locate (pt) {
-	    if (hasInterface(this._parentGeom, Polygonal) && this._parentGeom.getNumGeometries() > 50) {
-	      if (this._areaPtLocator === null) {
-	        this._areaPtLocator = new IndexedPointInAreaLocator(this._parentGeom);
-	      }
-	      return this._areaPtLocator.locate(pt)
-	    }
-	    return this._ptLocator.locate(pt, this._parentGeom)
-	  };
-	  GeometryGraph.prototype.findEdge = function findEdge () {
-	    if (arguments.length === 1) {
-	      var line = arguments[0];
-	      return this._lineEdgeMap.get(line)
-	    } else { return PlanarGraph$$1.prototype.findEdge.apply(this, arguments) }
-	  };
-	  GeometryGraph.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  GeometryGraph.prototype.getClass = function getClass () {
-	    return GeometryGraph
-	  };
-	  GeometryGraph.determineBoundary = function determineBoundary (boundaryNodeRule, boundaryCount) {
-	    return boundaryNodeRule.isInBoundary(boundaryCount) ? Location.BOUNDARY : Location.INTERIOR
-	  };
-
-	  return GeometryGraph;
-	}(PlanarGraph));
-
-	var GeometryGraphOp = function GeometryGraphOp () {
-	  this._li = new RobustLineIntersector();
-	  this._resultPrecisionModel = null;
-	  this._arg = null;
-	  if (arguments.length === 1) {
-	    var g0 = arguments[0];
-	    this.setComputationPrecision(g0.getPrecisionModel());
-	    this._arg = new Array(1).fill(null);
-	    this._arg[0] = new GeometryGraph(0, g0);
-	  } else if (arguments.length === 2) {
-	    var g0$1 = arguments[0];
-	    var g1 = arguments[1];
-	    var boundaryNodeRule = BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE;
-	    if (g0$1.getPrecisionModel().compareTo(g1.getPrecisionModel()) >= 0) { this.setComputationPrecision(g0$1.getPrecisionModel()); } else { this.setComputationPrecision(g1.getPrecisionModel()); }
-	    this._arg = new Array(2).fill(null);
-	    this._arg[0] = new GeometryGraph(0, g0$1, boundaryNodeRule);
-	    this._arg[1] = new GeometryGraph(1, g1, boundaryNodeRule);
-	  } else if (arguments.length === 3) {
-	    var g0$2 = arguments[0];
-	    var g1$1 = arguments[1];
-	    var boundaryNodeRule$1 = arguments[2];
-	    if (g0$2.getPrecisionModel().compareTo(g1$1.getPrecisionModel()) >= 0) { this.setComputationPrecision(g0$2.getPrecisionModel()); } else { this.setComputationPrecision(g1$1.getPrecisionModel()); }
-	    this._arg = new Array(2).fill(null);
-	    this._arg[0] = new GeometryGraph(0, g0$2, boundaryNodeRule$1);
-	    this._arg[1] = new GeometryGraph(1, g1$1, boundaryNodeRule$1);
-	  }
-	};
-	GeometryGraphOp.prototype.getArgGeometry = function getArgGeometry (i) {
-	  return this._arg[i].getGeometry()
-	};
-	GeometryGraphOp.prototype.setComputationPrecision = function setComputationPrecision (pm) {
-	  this._resultPrecisionModel = pm;
-	  this._li.setPrecisionModel(this._resultPrecisionModel);
-	};
-	GeometryGraphOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryGraphOp.prototype.getClass = function getClass () {
-	  return GeometryGraphOp
-	};
 
-	// operation.geometrygraph
+	function DEFAULT_COMPARE$1(a, b) {
+	  return a > b ? 1 : a < b ? -1 : 0;
+	}
+	/**
+	 * Simple top down splay, not requiring i to be in the tree t.
+	 */
 
-	var GeometryMapper = function GeometryMapper () {};
 
-	GeometryMapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryMapper.prototype.getClass = function getClass () {
-	  return GeometryMapper
-	};
-	GeometryMapper.map = function map () {
-	  if (arguments[0] instanceof Geometry && hasInterface(arguments[1], GeometryMapper.MapOp)) {
-	    var geom = arguments[0];
-	    var op = arguments[1];
-	    var mapped = new ArrayList();
-	    for (var i = 0; i < geom.getNumGeometries(); i++) {
-	      var g = op.map(geom.getGeometryN(i));
-	      if (g !== null) { mapped.add(g); }
-	    }
-	    return geom.getFactory().buildGeometry(mapped)
-	  } else if (hasInterface(arguments[0], Collection) && hasInterface(arguments[1], GeometryMapper.MapOp)) {
-	    var geoms = arguments[0];
-	    var op$1 = arguments[1];
-	    var mapped$1 = new ArrayList();
-	    for (var i$1 = geoms.iterator(); i$1.hasNext();) {
-	      var g$1 = i$1.next();
-	      var gr = op$1.map(g$1);
-	      if (gr !== null) { mapped$1.add(gr); }
-	    }
-	    return mapped$1
-	  }
-	};
-	GeometryMapper.MapOp = function MapOp () {};
-
-	var OverlayOp = (function (GeometryGraphOp) {
-	  function OverlayOp () {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    GeometryGraphOp.call(this, g0, g1);
-	    this._ptLocator = new PointLocator();
-	    this._geomFact = null;
-	    this._resultGeom = null;
-	    this._graph = null;
-	    this._edgeList = new EdgeList();
-	    this._resultPolyList = new ArrayList();
-	    this._resultLineList = new ArrayList();
-	    this._resultPointList = new ArrayList();
-	    this._graph = new PlanarGraph(new OverlayNodeFactory());
-	    this._geomFact = g0.getFactory();
-	  }
-
-	  if ( GeometryGraphOp ) { OverlayOp.__proto__ = GeometryGraphOp; }
-	  OverlayOp.prototype = Object.create( GeometryGraphOp && GeometryGraphOp.prototype );
-	  OverlayOp.prototype.constructor = OverlayOp;
-	  OverlayOp.prototype.insertUniqueEdge = function insertUniqueEdge (e) {
-	    var existingEdge = this._edgeList.findEqualEdge(e);
-	    if (existingEdge !== null) {
-	      var existingLabel = existingEdge.getLabel();
-	      var labelToMerge = e.getLabel();
-	      if (!existingEdge.isPointwiseEqual(e)) {
-	        labelToMerge = new Label(e.getLabel());
-	        labelToMerge.flip();
-	      }
-	      var depth = existingEdge.getDepth();
-	      if (depth.isNull()) {
-	        depth.add(existingLabel);
-	      }
-	      depth.add(labelToMerge);
-	      existingLabel.merge(labelToMerge);
-	    } else {
-	      this._edgeList.add(e);
-	    }
-	  };
-	  OverlayOp.prototype.getGraph = function getGraph () {
-	    return this._graph
-	  };
-	  OverlayOp.prototype.cancelDuplicateResultEdges = function cancelDuplicateResultEdges () {
-	    for (var it = this._graph.getEdgeEnds().iterator(); it.hasNext();) {
-	      var de = it.next();
-	      var sym = de.getSym();
-	      if (de.isInResult() && sym.isInResult()) {
-	        de.setInResult(false);
-	        sym.setInResult(false);
-	      }
-	    }
-	  };
-	  OverlayOp.prototype.isCoveredByLA = function isCoveredByLA (coord) {
-	    if (this.isCovered(coord, this._resultLineList)) { return true }
-	    if (this.isCovered(coord, this._resultPolyList)) { return true }
-	    return false
-	  };
-	  OverlayOp.prototype.computeGeometry = function computeGeometry (resultPointList, resultLineList, resultPolyList, opcode) {
-	    var geomList = new ArrayList();
-	    geomList.addAll(resultPointList);
-	    geomList.addAll(resultLineList);
-	    geomList.addAll(resultPolyList);
-	    if (geomList.isEmpty()) { return OverlayOp.createEmptyResult(opcode, this._arg[0].getGeometry(), this._arg[1].getGeometry(), this._geomFact) }
-	    return this._geomFact.buildGeometry(geomList)
-	  };
-	  OverlayOp.prototype.mergeSymLabels = function mergeSymLabels () {
-	    for (var nodeit = this._graph.getNodes().iterator(); nodeit.hasNext();) {
-	      var node = nodeit.next();
-	      node.getEdges().mergeSymLabels();
-	    }
-	  };
-	  OverlayOp.prototype.isCovered = function isCovered (coord, geomList) {
-	    var this$1 = this;
-
-	    for (var it = geomList.iterator(); it.hasNext();) {
-	      var geom = it.next();
-	      var loc = this$1._ptLocator.locate(coord, geom);
-	      if (loc !== Location.EXTERIOR) { return true }
-	    }
-	    return false
-	  };
-	  OverlayOp.prototype.replaceCollapsedEdges = function replaceCollapsedEdges () {
-	    var newEdges = new ArrayList();
-	    for (var it = this._edgeList.iterator(); it.hasNext();) {
-	      var e = it.next();
-	      if (e.isCollapsed()) {
-	        it.remove();
-	        newEdges.add(e.getCollapsedEdge());
-	      }
-	    }
-	    this._edgeList.addAll(newEdges);
-	  };
-	  OverlayOp.prototype.updateNodeLabelling = function updateNodeLabelling () {
-	    for (var nodeit = this._graph.getNodes().iterator(); nodeit.hasNext();) {
-	      var node = nodeit.next();
-	      var lbl = node.getEdges().getLabel();
-	      node.getLabel().merge(lbl);
-	    }
-	  };
-	  OverlayOp.prototype.getResultGeometry = function getResultGeometry (overlayOpCode) {
-	    this.computeOverlay(overlayOpCode);
-	    return this._resultGeom
-	  };
-	  OverlayOp.prototype.insertUniqueEdges = function insertUniqueEdges (edges) {
-	    var this$1 = this;
-
-	    for (var i = edges.iterator(); i.hasNext();) {
-	      var e = i.next();
-	      this$1.insertUniqueEdge(e);
-	    }
-	  };
-	  OverlayOp.prototype.computeOverlay = function computeOverlay (opCode) {
-	    this.copyPoints(0);
-	    this.copyPoints(1);
-	    this._arg[0].computeSelfNodes(this._li, false);
-	    this._arg[1].computeSelfNodes(this._li, false);
-	    this._arg[0].computeEdgeIntersections(this._arg[1], this._li, true);
-	    var baseSplitEdges = new ArrayList();
-	    this._arg[0].computeSplitEdges(baseSplitEdges);
-	    this._arg[1].computeSplitEdges(baseSplitEdges);
-	    // const splitEdges = baseSplitEdges
-	    this.insertUniqueEdges(baseSplitEdges);
-	    this.computeLabelsFromDepths();
-	    this.replaceCollapsedEdges();
-	    EdgeNodingValidator.checkValid(this._edgeList.getEdges());
-	    this._graph.addEdges(this._edgeList.getEdges());
-	    this.computeLabelling();
-	    this.labelIncompleteNodes();
-	    this.findResultAreaEdges(opCode);
-	    this.cancelDuplicateResultEdges();
-	    var polyBuilder = new PolygonBuilder(this._geomFact);
-	    polyBuilder.add(this._graph);
-	    this._resultPolyList = polyBuilder.getPolygons();
-	    var lineBuilder = new LineBuilder(this, this._geomFact, this._ptLocator);
-	    this._resultLineList = lineBuilder.build(opCode);
-	    var pointBuilder = new PointBuilder(this, this._geomFact, this._ptLocator);
-	    this._resultPointList = pointBuilder.build(opCode);
-	    this._resultGeom = this.computeGeometry(this._resultPointList, this._resultLineList, this._resultPolyList, opCode);
-	  };
-	  OverlayOp.prototype.labelIncompleteNode = function labelIncompleteNode (n, targetIndex) {
-	    var loc = this._ptLocator.locate(n.getCoordinate(), this._arg[targetIndex].getGeometry());
-	    n.getLabel().setLocation(targetIndex, loc);
-	  };
-	  OverlayOp.prototype.copyPoints = function copyPoints (argIndex) {
-	    var this$1 = this;
-
-	    for (var i = this._arg[argIndex].getNodeIterator(); i.hasNext();) {
-	      var graphNode = i.next();
-	      var newNode = this$1._graph.addNode(graphNode.getCoordinate());
-	      newNode.setLabel(argIndex, graphNode.getLabel().getLocation(argIndex));
-	    }
-	  };
-	  OverlayOp.prototype.findResultAreaEdges = function findResultAreaEdges (opCode) {
-	    for (var it = this._graph.getEdgeEnds().iterator(); it.hasNext();) {
-	      var de = it.next();
-	      var label = de.getLabel();
-	      if (label.isArea() && !de.isInteriorAreaEdge() && OverlayOp.isResultOfOp(label.getLocation(0, Position.RIGHT), label.getLocation(1, Position.RIGHT), opCode)) {
-	        de.setInResult(true);
-	      }
-	    }
-	  };
-	  OverlayOp.prototype.computeLabelsFromDepths = function computeLabelsFromDepths () {
-	    for (var it = this._edgeList.iterator(); it.hasNext();) {
-	      var e = it.next();
-	      var lbl = e.getLabel();
-	      var depth = e.getDepth();
-	      if (!depth.isNull()) {
-	        depth.normalize();
-	        for (var i = 0; i < 2; i++) {
-	          if (!lbl.isNull(i) && lbl.isArea() && !depth.isNull(i)) {
-	            if (depth.getDelta(i) === 0) {
-	              lbl.toLine(i);
-	            } else {
-	              Assert.isTrue(!depth.isNull(i, Position.LEFT), 'depth of LEFT side has not been initialized');
-	              lbl.setLocation(i, Position.LEFT, depth.getLocation(i, Position.LEFT));
-	              Assert.isTrue(!depth.isNull(i, Position.RIGHT), 'depth of RIGHT side has not been initialized');
-	              lbl.setLocation(i, Position.RIGHT, depth.getLocation(i, Position.RIGHT));
-	            }
-	          }
-	        }
-	      }
-	    }
-	  };
-	  OverlayOp.prototype.computeLabelling = function computeLabelling () {
-	    var this$1 = this;
+	function splay(i, t, comparator) {
+	  var N = new Node$1(null, null);
+	  var l = N;
+	  var r = N;
 
-	    for (var nodeit = this._graph.getNodes().iterator(); nodeit.hasNext();) {
-	      var node = nodeit.next();
-	      node.getEdges().computeLabelling(this$1._arg);
-	    }
-	    this.mergeSymLabels();
-	    this.updateNodeLabelling();
-	  };
-	  OverlayOp.prototype.labelIncompleteNodes = function labelIncompleteNodes () {
-	    var this$1 = this;
+	  while (true) {
+	    var cmp = comparator(i, t.key); //if (i < t.key) {
 
-	    // let nodeCount = 0
-	    for (var ni = this._graph.getNodes().iterator(); ni.hasNext();) {
-	      var n = ni.next();
-	      var label = n.getLabel();
-	      if (n.isIsolated()) {
-	        // nodeCount++
-	        if (label.isNull(0)) { this$1.labelIncompleteNode(n, 0); } else { this$1.labelIncompleteNode(n, 1); }
-	      }
-	      n.getEdges().updateLabelling(label);
-	    }
-	  };
-	  OverlayOp.prototype.isCoveredByA = function isCoveredByA (coord) {
-	    if (this.isCovered(coord, this._resultPolyList)) { return true }
-	    return false
-	  };
-	  OverlayOp.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  OverlayOp.prototype.getClass = function getClass () {
-	    return OverlayOp
-	  };
+	    if (cmp < 0) {
+	      if (t.left === null) break; //if (i < t.left.key) {
 
-	  return OverlayOp;
-	}(GeometryGraphOp));
+	      if (comparator(i, t.left.key) < 0) {
+	        var y = t.left;
+	        /* rotate right */
 
-	OverlayOp.overlayOp = function (geom0, geom1, opCode) {
-	  var gov = new OverlayOp(geom0, geom1);
-	  var geomOv = gov.getResultGeometry(opCode);
-	  return geomOv
-	};
-	OverlayOp.intersection = function (g, other) {
-	  if (g.isEmpty() || other.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.INTERSECTION, g, other, g.getFactory()) }
-	  if (g.isGeometryCollection()) {
-	    var g2 = other;
-	    return GeometryCollectionMapper.map(g, {
-	      interfaces_: function () {
-	        return [GeometryMapper.MapOp]
-	      },
-	      map: function (g) {
-	        return g.intersection(g2)
+	        t.left = y.right;
+	        y.right = t;
+	        t = y;
+	        if (t.left === null) break;
 	      }
-	    })
-	  }
-	  g.checkNotGeometryCollection(g);
-	  g.checkNotGeometryCollection(other);
-	  return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.INTERSECTION)
-	};
-	OverlayOp.symDifference = function (g, other) {
-	  if (g.isEmpty() || other.isEmpty()) {
-	    if (g.isEmpty() && other.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.SYMDIFFERENCE, g, other, g.getFactory()) }
-	    if (g.isEmpty()) { return other.copy() }
-	    if (other.isEmpty()) { return g.copy() }
-	  }
-	  g.checkNotGeometryCollection(g);
-	  g.checkNotGeometryCollection(other);
-	  return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.SYMDIFFERENCE)
-	};
-	OverlayOp.resultDimension = function (opCode, g0, g1) {
-	  var dim0 = g0.getDimension();
-	  var dim1 = g1.getDimension();
-	  var resultDimension = -1;
-	  switch (opCode) {
-	    case OverlayOp.INTERSECTION:
-	      resultDimension = Math.min(dim0, dim1);
-	      break
-	    case OverlayOp.UNION:
-	      resultDimension = Math.max(dim0, dim1);
-	      break
-	    case OverlayOp.DIFFERENCE:
-	      resultDimension = dim0;
-	      break
-	    case OverlayOp.SYMDIFFERENCE:
-	      resultDimension = Math.max(dim0, dim1);
-	      break
-	  }
-	  return resultDimension
-	};
-	OverlayOp.createEmptyResult = function (overlayOpCode, a, b, geomFact) {
-	  var result = null;
-	  switch (OverlayOp.resultDimension(overlayOpCode, a, b)) {
-	    case -1:
-	      result = geomFact.createGeometryCollection(new Array(0).fill(null));
-	      break
-	    case 0:
-	      result = geomFact.createPoint();
-	      break
-	    case 1:
-	      result = geomFact.createLineString();
-	      break
-	    case 2:
-	      result = geomFact.createPolygon();
-	      break
-	  }
-	  return result
-	};
-	OverlayOp.difference = function (g, other) {
-	  if (g.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.DIFFERENCE, g, other, g.getFactory()) }
-	  if (other.isEmpty()) { return g.copy() }
-	  g.checkNotGeometryCollection(g);
-	  g.checkNotGeometryCollection(other);
-	  return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.DIFFERENCE)
-	};
-	OverlayOp.isResultOfOp = function () {
-	  if (arguments.length === 2) {
-	    var label = arguments[0];
-	    var opCode = arguments[1];
-	    var loc0 = label.getLocation(0);
-	    var loc1 = label.getLocation(1);
-	    return OverlayOp.isResultOfOp(loc0, loc1, opCode)
-	  } else if (arguments.length === 3) {
-	    var loc0$1 = arguments[0];
-	    var loc1$1 = arguments[1];
-	    var overlayOpCode = arguments[2];
-	    if (loc0$1 === Location.BOUNDARY) { loc0$1 = Location.INTERIOR; }
-	    if (loc1$1 === Location.BOUNDARY) { loc1$1 = Location.INTERIOR; }
-	    switch (overlayOpCode) {
-	      case OverlayOp.INTERSECTION:
-	        return loc0$1 === Location.INTERIOR && loc1$1 === Location.INTERIOR
-	      case OverlayOp.UNION:
-	        return loc0$1 === Location.INTERIOR || loc1$1 === Location.INTERIOR
-	      case OverlayOp.DIFFERENCE:
-	        return loc0$1 === Location.INTERIOR && loc1$1 !== Location.INTERIOR
-	      case OverlayOp.SYMDIFFERENCE:
-	        return (loc0$1 === Location.INTERIOR && loc1$1 !== Location.INTERIOR) || (loc0$1 !== Location.INTERIOR && loc1$1 === Location.INTERIOR)
-	    }
-	    return false
-	  }
-	};
-	OverlayOp.INTERSECTION = 1;
-	OverlayOp.UNION = 2;
-	OverlayOp.DIFFERENCE = 3;
-	OverlayOp.SYMDIFFERENCE = 4;
-
-	var FuzzyPointLocator = function FuzzyPointLocator () {
-	  this._g = null;
-	  this._boundaryDistanceTolerance = null;
-	  this._linework = null;
-	  this._ptLocator = new PointLocator();
-	  this._seg = new LineSegment();
-	  var g = arguments[0];
-	  var boundaryDistanceTolerance = arguments[1];
-	  this._g = g;
-	  this._boundaryDistanceTolerance = boundaryDistanceTolerance;
-	  this._linework = this.extractLinework(g);
-	};
-	FuzzyPointLocator.prototype.isWithinToleranceOfBoundary = function isWithinToleranceOfBoundary (pt) {
-	    var this$1 = this;
 
-	  for (var i = 0; i < this._linework.getNumGeometries(); i++) {
-	    var line = this$1._linework.getGeometryN(i);
-	    var seq = line.getCoordinateSequence();
-	    for (var j = 0; j < seq.size() - 1; j++) {
-	      seq.getCoordinate(j, this$1._seg.p0);
-	      seq.getCoordinate(j + 1, this$1._seg.p1);
-	      var dist = this$1._seg.distance(pt);
-	      if (dist <= this$1._boundaryDistanceTolerance) { return true }
-	    }
-	  }
-	  return false
-	};
-	FuzzyPointLocator.prototype.getLocation = function getLocation (pt) {
-	  if (this.isWithinToleranceOfBoundary(pt)) { return Location.BOUNDARY }
-	  return this._ptLocator.locate(pt, this._g)
-	};
-	FuzzyPointLocator.prototype.extractLinework = function extractLinework (g) {
-	  var extracter = new PolygonalLineworkExtracter();
-	  g.apply(extracter);
-	  var linework = extracter.getLinework();
-	  var lines = GeometryFactory.toLineStringArray(linework);
-	  return g.getFactory().createMultiLineString(lines)
-	};
-	FuzzyPointLocator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	FuzzyPointLocator.prototype.getClass = function getClass () {
-	  return FuzzyPointLocator
-	};
+	      r.left = t;
+	      /* link right */
 
-	var PolygonalLineworkExtracter = function PolygonalLineworkExtracter () {
-	  this._linework = null;
-	  this._linework = new ArrayList();
-	};
-	PolygonalLineworkExtracter.prototype.getLinework = function getLinework () {
-	  return this._linework
-	};
-	PolygonalLineworkExtracter.prototype.filter = function filter (g) {
-	    var this$1 = this;
+	      r = t;
+	      t = t.left; //} else if (i > t.key) {
+	    } else if (cmp > 0) {
+	      if (t.right === null) break; //if (i > t.right.key) {
 
-	  if (g instanceof Polygon) {
-	    var poly = g;
-	    this._linework.add(poly.getExteriorRing());
-	    for (var i = 0; i < poly.getNumInteriorRing(); i++) {
-	      this$1._linework.add(poly.getInteriorRingN(i));
-	    }
-	  }
-	};
-	PolygonalLineworkExtracter.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryFilter]
-	};
-	PolygonalLineworkExtracter.prototype.getClass = function getClass () {
-	  return PolygonalLineworkExtracter
-	};
+	      if (comparator(i, t.right.key) > 0) {
+	        var _y = t.right;
+	        /* rotate left */
 
-	var OffsetPointGenerator = function OffsetPointGenerator () {
-	  this._g = null;
-	  this._doLeft = true;
-	  this._doRight = true;
-	  var g = arguments[0];
-	  this._g = g;
-	};
-	OffsetPointGenerator.prototype.extractPoints = function extractPoints (line, offsetDistance, offsetPts) {
-	    var this$1 = this;
+	        t.right = _y.left;
+	        _y.left = t;
+	        t = _y;
+	        if (t.right === null) break;
+	      }
 
-	  var pts = line.getCoordinates();
-	  for (var i = 0; i < pts.length - 1; i++) {
-	    this$1.computeOffsetPoints(pts[i], pts[i + 1], offsetDistance, offsetPts);
-	  }
-	};
-	OffsetPointGenerator.prototype.setSidesToGenerate = function setSidesToGenerate (doLeft, doRight) {
-	  this._doLeft = doLeft;
-	  this._doRight = doRight;
-	};
-	OffsetPointGenerator.prototype.getPoints = function getPoints (offsetDistance) {
-	    var this$1 = this;
+	      l.right = t;
+	      /* link left */
 
-	  var offsetPts = new ArrayList();
-	  var lines = LinearComponentExtracter.getLines(this._g);
-	  for (var i = lines.iterator(); i.hasNext();) {
-	    var line = i.next();
-	    this$1.extractPoints(line, offsetDistance, offsetPts);
-	  }
-	  return offsetPts
-	};
-	OffsetPointGenerator.prototype.computeOffsetPoints = function computeOffsetPoints (p0, p1, offsetDistance, offsetPts) {
-	  var dx = p1.x - p0.x;
-	  var dy = p1.y - p0.y;
-	  var len = Math.sqrt(dx * dx + dy * dy);
-	  var ux = offsetDistance * dx / len;
-	  var uy = offsetDistance * dy / len;
-	  var midX = (p1.x + p0.x) / 2;
-	  var midY = (p1.y + p0.y) / 2;
-	  if (this._doLeft) {
-	    var offsetLeft = new Coordinate(midX - uy, midY + ux);
-	    offsetPts.add(offsetLeft);
-	  }
-	  if (this._doRight) {
-	    var offsetRight = new Coordinate(midX + uy, midY - ux);
-	    offsetPts.add(offsetRight);
+	      l = t;
+	      t = t.right;
+	    } else break;
 	  }
-	};
-	OffsetPointGenerator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetPointGenerator.prototype.getClass = function getClass () {
-	  return OffsetPointGenerator
-	};
-
-	var OverlayResultValidator = function OverlayResultValidator () {
-	  this._geom = null;
-	  this._locFinder = null;
-	  this._location = new Array(3).fill(null);
-	  this._invalidLocation = null;
-	  this._boundaryDistanceTolerance = OverlayResultValidator.TOLERANCE;
-	  this._testCoords = new ArrayList();
-	  var a = arguments[0];
-	  var b = arguments[1];
-	  var result = arguments[2];
-	  this._boundaryDistanceTolerance = OverlayResultValidator.computeBoundaryDistanceTolerance(a, b);
-	  this._geom = [a, b, result];
-	  this._locFinder = [new FuzzyPointLocator(this._geom[0], this._boundaryDistanceTolerance), new FuzzyPointLocator(this._geom[1], this._boundaryDistanceTolerance), new FuzzyPointLocator(this._geom[2], this._boundaryDistanceTolerance)];
-	};
+	  /* assemble */
 
-	var staticAccessors$46 = { TOLERANCE: { configurable: true } };
-	OverlayResultValidator.prototype.reportResult = function reportResult (overlayOp, location, expectedInterior) {
-	  System.out.println('Overlay result invalid - A:' + Location.toLocationSymbol(location[0]) + ' B:' + Location.toLocationSymbol(location[1]) + ' expected:' + (expectedInterior ? 'i' : 'e') + ' actual:' + Location.toLocationSymbol(location[2]));
-	};
-	OverlayResultValidator.prototype.isValid = function isValid (overlayOp) {
-	  this.addTestPts(this._geom[0]);
-	  this.addTestPts(this._geom[1]);
-	  var isValid = this.checkValid(overlayOp);
-	  return isValid
-	};
-	OverlayResultValidator.prototype.checkValid = function checkValid () {
-	    var this$1 = this;
 
-	  if (arguments.length === 1) {
-	    var overlayOp = arguments[0];
-	    for (var i = 0; i < this._testCoords.size(); i++) {
-	      var pt = this$1._testCoords.get(i);
-	      if (!this$1.checkValid(overlayOp, pt)) {
-	        this$1._invalidLocation = pt;
-	        return false
-	      }
-	    }
-	    return true
-	  } else if (arguments.length === 2) {
-	    var overlayOp$1 = arguments[0];
-	    var pt$1 = arguments[1];
-	    this._location[0] = this._locFinder[0].getLocation(pt$1);
-	    this._location[1] = this._locFinder[1].getLocation(pt$1);
-	    this._location[2] = this._locFinder[2].getLocation(pt$1);
-	    if (OverlayResultValidator.hasLocation(this._location, Location.BOUNDARY)) { return true }
-	    return this.isValidResult(overlayOp$1, this._location)
-	  }
-	};
-	OverlayResultValidator.prototype.addTestPts = function addTestPts (g) {
-	  var ptGen = new OffsetPointGenerator(g);
-	  this._testCoords.addAll(ptGen.getPoints(5 * this._boundaryDistanceTolerance));
-	};
-	OverlayResultValidator.prototype.isValidResult = function isValidResult (overlayOp, location) {
-	  var expectedInterior = OverlayOp.isResultOfOp(location[0], location[1], overlayOp);
-	  var resultInInterior = location[2] === Location.INTERIOR;
-	  var isValid = !(expectedInterior ^ resultInInterior);
-	  if (!isValid) { this.reportResult(overlayOp, location, expectedInterior); }
-	  return isValid
-	};
-	OverlayResultValidator.prototype.getInvalidLocation = function getInvalidLocation () {
-	  return this._invalidLocation
-	};
-	OverlayResultValidator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OverlayResultValidator.prototype.getClass = function getClass () {
-	  return OverlayResultValidator
-	};
-	OverlayResultValidator.hasLocation = function hasLocation (location, loc) {
-	  for (var i = 0; i < 3; i++) {
-	    if (location[i] === loc) { return true }
-	  }
-	  return false
-	};
-	OverlayResultValidator.computeBoundaryDistanceTolerance = function computeBoundaryDistanceTolerance (g0, g1) {
-	  return Math.min(GeometrySnapper.computeSizeBasedSnapTolerance(g0), GeometrySnapper.computeSizeBasedSnapTolerance(g1))
-	};
-	OverlayResultValidator.isValid = function isValid (a, b, overlayOp, result) {
-	  var validator = new OverlayResultValidator(a, b, result);
-	  return validator.isValid(overlayOp)
-	};
-	staticAccessors$46.TOLERANCE.get = function () { return 0.000001 };
+	  l.right = t.left;
+	  r.left = t.right;
+	  t.left = N.right;
+	  t.right = N.left;
+	  return t;
+	}
 
-	Object.defineProperties( OverlayResultValidator, staticAccessors$46 );
+	function _insert(i, data, t, comparator) {
+	  var node = new Node$1(i, data);
 
-	// operation.overlay
+	  if (t === null) {
+	    node.left = node.right = null;
+	    return node;
+	  }
 
-	var GeometryCombiner = function GeometryCombiner (geoms) {
-	  this._geomFactory = null;
-	  this._skipEmpty = false;
-	  this._inputGeoms = null;
-	  this._geomFactory = GeometryCombiner.extractFactory(geoms);
-	  this._inputGeoms = geoms;
-	};
-	GeometryCombiner.prototype.extractElements = function extractElements (geom, elems) {
-	    var this$1 = this;
+	  t = splay(i, t, comparator);
+	  var cmp = comparator(i, t.key);
 
-	  if (geom === null) { return null }
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var elemGeom = geom.getGeometryN(i);
-	    if (this$1._skipEmpty && elemGeom.isEmpty()) { continue }
-	    elems.add(elemGeom);
+	  if (cmp < 0) {
+	    node.left = t.left;
+	    node.right = t;
+	    t.left = null;
+	  } else if (cmp >= 0) {
+	    node.right = t.right;
+	    node.left = t;
+	    t.right = null;
 	  }
-	};
-	GeometryCombiner.prototype.combine = function combine () {
-	    var this$1 = this;
 
-	  var elems = new ArrayList();
-	  for (var i = this._inputGeoms.iterator(); i.hasNext();) {
-	    var g = i.next();
-	    this$1.extractElements(g, elems);
-	  }
-	  if (elems.size() === 0) {
-	    if (this._geomFactory !== null) {
-	      return this._geomFactory.createGeometryCollection(null)
-	    }
-	    return null
-	  }
-	  return this._geomFactory.buildGeometry(elems)
-	};
-	GeometryCombiner.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryCombiner.prototype.getClass = function getClass () {
-	  return GeometryCombiner
-	};
-	GeometryCombiner.combine = function combine () {
-	  if (arguments.length === 1) {
-	    var geoms = arguments[0];
-	    var combiner = new GeometryCombiner(geoms);
-	    return combiner.combine()
-	  } else if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    var combiner$1 = new GeometryCombiner(GeometryCombiner.createList(g0, g1));
-	    return combiner$1.combine()
-	  } else if (arguments.length === 3) {
-	    var g0$1 = arguments[0];
-	    var g1$1 = arguments[1];
-	    var g2 = arguments[2];
-	    var combiner$2 = new GeometryCombiner(GeometryCombiner.createList(g0$1, g1$1, g2));
-	    return combiner$2.combine()
-	  }
-	};
-	GeometryCombiner.extractFactory = function extractFactory (geoms) {
-	  if (geoms.isEmpty()) { return null }
-	  return geoms.iterator().next().getFactory()
-	};
-	GeometryCombiner.createList = function createList () {
-	  if (arguments.length === 2) {
-	    var obj0 = arguments[0];
-	    var obj1 = arguments[1];
-	    var list = new ArrayList();
-	    list.add(obj0);
-	    list.add(obj1);
-	    return list
-	  } else if (arguments.length === 3) {
-	    var obj0$1 = arguments[0];
-	    var obj1$1 = arguments[1];
-	    var obj2 = arguments[2];
-	    var list$1 = new ArrayList();
-	    list$1.add(obj0$1);
-	    list$1.add(obj1$1);
-	    list$1.add(obj2);
-	    return list$1
-	  }
-	};
+	  return node;
+	}
 
-	var CascadedPolygonUnion = function CascadedPolygonUnion () {
-	  this._inputPolys = null;
-	  this._geomFactory = null;
-	  var polys = arguments[0];
-	  this._inputPolys = polys;
-	  if (this._inputPolys === null) { this._inputPolys = new ArrayList(); }
-	};
+	function _split(key, v, comparator) {
+	  var left = null;
+	  var right = null;
 
-	var staticAccessors$47 = { STRTREE_NODE_CAPACITY: { configurable: true } };
-	CascadedPolygonUnion.prototype.reduceToGeometries = function reduceToGeometries (geomTree) {
-	    var this$1 = this;
+	  if (v) {
+	    v = splay(key, v, comparator);
+	    var cmp = comparator(v.key, key);
 
-	  var geoms = new ArrayList();
-	  for (var i = geomTree.iterator(); i.hasNext();) {
-	    var o = i.next();
-	    var geom = null;
-	    if (hasInterface(o, List)) {
-	      geom = this$1.unionTree(o);
-	    } else if (o instanceof Geometry) {
-	      geom = o;
-	    }
-	    geoms.add(geom);
-	  }
-	  return geoms
-	};
-	CascadedPolygonUnion.prototype.extractByEnvelope = function extractByEnvelope (env, geom, disjointGeoms) {
-	  var intersectingGeoms = new ArrayList();
-	  for (var i = 0; i < geom.getNumGeometries(); i++) {
-	    var elem = geom.getGeometryN(i);
-	    if (elem.getEnvelopeInternal().intersects(env)) { intersectingGeoms.add(elem); } else { disjointGeoms.add(elem); }
-	  }
-	  return this._geomFactory.buildGeometry(intersectingGeoms)
-	};
-	CascadedPolygonUnion.prototype.unionOptimized = function unionOptimized (g0, g1) {
-	  var g0Env = g0.getEnvelopeInternal();
-	  var g1Env = g1.getEnvelopeInternal();
-	  if (!g0Env.intersects(g1Env)) {
-	    var combo = GeometryCombiner.combine(g0, g1);
-	    return combo
-	  }
-	  if (g0.getNumGeometries() <= 1 && g1.getNumGeometries() <= 1) { return this.unionActual(g0, g1) }
-	  var commonEnv = g0Env.intersection(g1Env);
-	  return this.unionUsingEnvelopeIntersection(g0, g1, commonEnv)
-	};
-	CascadedPolygonUnion.prototype.union = function union () {
-	  if (this._inputPolys === null) { throw new Error('union() method cannot be called twice') }
-	  if (this._inputPolys.isEmpty()) { return null }
-	  this._geomFactory = this._inputPolys.iterator().next().getFactory();
-	  var index = new STRtree(CascadedPolygonUnion.STRTREE_NODE_CAPACITY);
-	  for (var i = this._inputPolys.iterator(); i.hasNext();) {
-	    var item = i.next();
-	    index.insert(item.getEnvelopeInternal(), item);
-	  }
-	  this._inputPolys = null;
-	  var itemTree = index.itemsTree();
-	  var unionAll = this.unionTree(itemTree);
-	  return unionAll
-	};
-	CascadedPolygonUnion.prototype.binaryUnion = function binaryUnion () {
-	  if (arguments.length === 1) {
-	    var geoms = arguments[0];
-	    return this.binaryUnion(geoms, 0, geoms.size())
-	  } else if (arguments.length === 3) {
-	    var geoms$1 = arguments[0];
-	    var start = arguments[1];
-	    var end = arguments[2];
-	    if (end - start <= 1) {
-	      var g0 = CascadedPolygonUnion.getGeometry(geoms$1, start);
-	      return this.unionSafe(g0, null)
-	    } else if (end - start === 2) {
-	      return this.unionSafe(CascadedPolygonUnion.getGeometry(geoms$1, start), CascadedPolygonUnion.getGeometry(geoms$1, start + 1))
+	    if (cmp === 0) {
+	      left = v.left;
+	      right = v.right;
+	    } else if (cmp < 0) {
+	      right = v.right;
+	      v.right = null;
+	      left = v;
 	    } else {
-	      var mid = Math.trunc((end + start) / 2);
-	      var g0$1 = this.binaryUnion(geoms$1, start, mid);
-	      var g1 = this.binaryUnion(geoms$1, mid, end);
-	      return this.unionSafe(g0$1, g1)
+	      left = v.left;
+	      v.left = null;
+	      right = v;
 	    }
 	  }
-	};
-	CascadedPolygonUnion.prototype.repeatedUnion = function repeatedUnion (geoms) {
-	  var union = null;
-	  for (var i = geoms.iterator(); i.hasNext();) {
-	    var g = i.next();
-	    if (union === null) { union = g.copy(); } else { union = union.union(g); }
-	  }
-	  return union
-	};
-	CascadedPolygonUnion.prototype.unionSafe = function unionSafe (g0, g1) {
-	  if (g0 === null && g1 === null) { return null }
-	  if (g0 === null) { return g1.copy() }
-	  if (g1 === null) { return g0.copy() }
-	  return this.unionOptimized(g0, g1)
-	};
-	CascadedPolygonUnion.prototype.unionActual = function unionActual (g0, g1) {
-	  return CascadedPolygonUnion.restrictToPolygons(g0.union(g1))
-	};
-	CascadedPolygonUnion.prototype.unionTree = function unionTree (geomTree) {
-	  var geoms = this.reduceToGeometries(geomTree);
-	  var union = this.binaryUnion(geoms);
-	  return union
-	};
-	CascadedPolygonUnion.prototype.unionUsingEnvelopeIntersection = function unionUsingEnvelopeIntersection (g0, g1, common) {
-	  var disjointPolys = new ArrayList();
-	  var g0Int = this.extractByEnvelope(common, g0, disjointPolys);
-	  var g1Int = this.extractByEnvelope(common, g1, disjointPolys);
-	  var union = this.unionActual(g0Int, g1Int);
-	  disjointPolys.add(union);
-	  var overallUnion = GeometryCombiner.combine(disjointPolys);
-	  return overallUnion
-	};
-	CascadedPolygonUnion.prototype.bufferUnion = function bufferUnion () {
-	  if (arguments.length === 1) {
-	    var geoms = arguments[0];
-	    var factory = geoms.get(0).getFactory();
-	    var gColl = factory.buildGeometry(geoms);
-	    var unionAll = gColl.buffer(0.0);
-	    return unionAll
-	  } else if (arguments.length === 2) {
-	    var g0 = arguments[0];
-	    var g1 = arguments[1];
-	    var factory$1 = g0.getFactory();
-	    var gColl$1 = factory$1.createGeometryCollection([g0, g1]);
-	    var unionAll$1 = gColl$1.buffer(0.0);
-	    return unionAll$1
-	  }
-	};
-	CascadedPolygonUnion.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CascadedPolygonUnion.prototype.getClass = function getClass () {
-	  return CascadedPolygonUnion
-	};
-	CascadedPolygonUnion.restrictToPolygons = function restrictToPolygons (g) {
-	  if (hasInterface(g, Polygonal)) {
-	    return g
-	  }
-	  var polygons = PolygonExtracter.getPolygons(g);
-	  if (polygons.size() === 1) { return polygons.get(0) }
-	  return g.getFactory().createMultiPolygon(GeometryFactory.toPolygonArray(polygons))
-	};
-	CascadedPolygonUnion.getGeometry = function getGeometry (list, index) {
-	  if (index >= list.size()) { return null }
-	  return list.get(index)
-	};
-	CascadedPolygonUnion.union = function union (polys) {
-	  var op = new CascadedPolygonUnion(polys);
-	  return op.union()
-	};
-	staticAccessors$47.STRTREE_NODE_CAPACITY.get = function () { return 4 };
-
-	Object.defineProperties( CascadedPolygonUnion, staticAccessors$47 );
 
-	var UnionOp = function UnionOp () {};
-
-	UnionOp.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	UnionOp.prototype.getClass = function getClass () {
-	  return UnionOp
-	};
-	UnionOp.union = function union (g, other) {
-	  if (g.isEmpty() || other.isEmpty()) {
-	    if (g.isEmpty() && other.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.UNION, g, other, g.getFactory()) }
-	    if (g.isEmpty()) { return other.copy() }
-	    if (other.isEmpty()) { return g.copy() }
-	  }
-	  g.checkNotGeometryCollection(g);
-	  g.checkNotGeometryCollection(other);
-	  return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.UNION)
-	};
+	  return {
+	    left: left,
+	    right: right
+	  };
+	}
 
+	function merge$4(left, right, comparator) {
+	  if (right === null) return left;
+	  if (left === null) return right;
+	  right = splay(left.key, right, comparator);
+	  right.left = left;
+	  return right;
+	}
 	/**
-	 * Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.
+	 * Prints level of the tree
 	 */
 
-	/**
-	 * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
-	 *
-	 * @name feature
-	 * @param {Geometry} geometry input geometry
-	 * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-	 * @param {Object} [options={}] Optional Parameters
-	 * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-	 * @param {string|number} [options.id] Identifier associated with the Feature
-	 * @returns {Feature} a GeoJSON Feature
-	 * @example
-	 * var geometry = {
-	 *   "type": "Point",
-	 *   "coordinates": [110, 50]
-	 * };
-	 *
-	 * var feature = turf.feature(geometry);
-	 *
-	 * //=feature
-	 */
-	function feature$1(geometry, properties, options) {
-	    // Optional Parameters
-	    options = options || {};
-	    if (!isObject$4(options)) { throw new Error('options is invalid'); }
-	    var bbox = options.bbox;
-	    var id = options.id;
-
-	    // Validation
-	    if (geometry === undefined) { throw new Error('geometry is required'); }
-	    if (properties && properties.constructor !== Object) { throw new Error('properties must be an Object'); }
-	    if (bbox) { validateBBox(bbox); }
-	    if (id) { validateId(id); }
-
-	    // Main
-	    var feat = {type: 'Feature'};
-	    if (id) { feat.id = id; }
-	    if (bbox) { feat.bbox = bbox; }
-	    feat.properties = properties || {};
-	    feat.geometry = geometry;
-	    return feat;
-	}
 
-	/**
-	 * isNumber
-	 *
-	 * @param {*} num Number to validate
-	 * @returns {boolean} true/false
-	 * @example
-	 * turf.isNumber(123)
-	 * //=true
-	 * turf.isNumber('foo')
-	 * //=false
-	 */
-	function isNumber$1(num) {
-	    return !isNaN(num) && num !== null && !Array.isArray(num);
+	function printRow(root, prefix, isTail, out, printNode) {
+	  if (root) {
+	    out("".concat(prefix).concat(isTail ? '└── ' : '├── ').concat(printNode(root), "\n"));
+	    var indent = prefix + (isTail ? '    ' : '│   ');
+	    if (root.left) printRow(root.left, indent, false, out, printNode);
+	    if (root.right) printRow(root.right, indent, true, out, printNode);
+	  }
 	}
 
-	/**
-	 * isObject
-	 *
-	 * @param {*} input variable to validate
-	 * @returns {boolean} true/false
-	 * @example
-	 * turf.isObject({elevation: 10})
-	 * //=true
-	 * turf.isObject('foo')
-	 * //=false
-	 */
-	function isObject$4(input) {
-	    return (!!input) && (input.constructor === Object);
-	}
+	var Tree = /*#__PURE__*/function () {
+	  function Tree() {
+	    var comparator = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : DEFAULT_COMPARE$1;
 
-	/**
-	 * Validate BBox
-	 *
-	 * @private
-	 * @param {Array<number>} bbox BBox to validate
-	 * @returns {void}
-	 * @throws Error if BBox is not valid
-	 * @example
-	 * validateBBox([-180, -40, 110, 50])
-	 * //=OK
-	 * validateBBox([-180, -40])
-	 * //=Error
-	 * validateBBox('Foo')
-	 * //=Error
-	 * validateBBox(5)
-	 * //=Error
-	 * validateBBox(null)
-	 * //=Error
-	 * validateBBox(undefined)
-	 * //=Error
-	 */
-	function validateBBox(bbox) {
-	    if (!bbox) { throw new Error('bbox is required'); }
-	    if (!Array.isArray(bbox)) { throw new Error('bbox must be an Array'); }
-	    if (bbox.length !== 4 && bbox.length !== 6) { throw new Error('bbox must be an Array of 4 or 6 numbers'); }
-	    bbox.forEach(function (num) {
-	        if (!isNumber$1(num)) { throw new Error('bbox must only contain numbers'); }
-	    });
-	}
+	    _classCallCheck(this, Tree);
 
-	/**
-	 * Validate Id
-	 *
-	 * @private
-	 * @param {string|number} id Id to validate
-	 * @returns {void}
-	 * @throws Error if Id is not valid
-	 * @example
-	 * validateId([-180, -40, 110, 50])
-	 * //=Error
-	 * validateId([-180, -40])
-	 * //=Error
-	 * validateId('Foo')
-	 * //=OK
-	 * validateId(5)
-	 * //=OK
-	 * validateId(null)
-	 * //=Error
-	 * validateId(undefined)
-	 * //=Error
-	 */
-	function validateId(id) {
-	    if (!id) { throw new Error('id is required'); }
-	    if (['string', 'number'].indexOf(typeof id) === -1) { throw new Error('id must be a number or a string'); }
-	}
+	    this._root = null;
+	    this._size = 0;
+	    this._comparator = comparator;
+	  }
+	  /**
+	   * Inserts a key, allows duplicates
+	   */
 
-	/**
-	 * Callback for geomEach
-	 *
-	 * @callback geomEachCallback
-	 * @param {Geometry} currentGeometry The current Geometry being processed.
-	 * @param {number} featureIndex The current index of the Feature being processed.
-	 * @param {Object} featureProperties The current Feature Properties being processed.
-	 * @param {Array<number>} featureBBox The current Feature BBox being processed.
-	 * @param {number|string} featureId The current Feature Id being processed.
-	 */
 
-	/**
-	 * Iterate over each geometry in any GeoJSON object, similar to Array.forEach()
-	 *
-	 * @name geomEach
-	 * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
-	 * @param {Function} callback a method that takes (currentGeometry, featureIndex, featureProperties, featureBBox, featureId)
-	 * @returns {void}
-	 * @example
-	 * var features = turf.featureCollection([
-	 *     turf.point([26, 37], {foo: 'bar'}),
-	 *     turf.point([36, 53], {hello: 'world'})
-	 * ]);
-	 *
-	 * turf.geomEach(features, function (currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
-	 *   //=currentGeometry
-	 *   //=featureIndex
-	 *   //=featureProperties
-	 *   //=featureBBox
-	 *   //=featureId
-	 * });
-	 */
-	function geomEach(geojson, callback) {
-	    var i, j, g, geometry, stopG,
-	        geometryMaybeCollection,
-	        isGeometryCollection,
-	        featureProperties,
-	        featureBBox,
-	        featureId,
-	        featureIndex = 0,
-	        isFeatureCollection = geojson.type === 'FeatureCollection',
-	        isFeature = geojson.type === 'Feature',
-	        stop = isFeatureCollection ? geojson.features.length : 1;
-
-	    // This logic may look a little weird. The reason why it is that way
-	    // is because it's trying to be fast. GeoJSON supports multiple kinds
-	    // of objects at its root: FeatureCollection, Features, Geometries.
-	    // This function has the responsibility of handling all of them, and that
-	    // means that some of the `for` loops you see below actually just don't apply
-	    // to certain inputs. For instance, if you give this just a
-	    // Point geometry, then both loops are short-circuited and all we do
-	    // is gradually rename the input until it's called 'geometry'.
-	    //
-	    // This also aims to allocate as few resources as possible: just a
-	    // few numbers and booleans, rather than any temporary arrays as would
-	    // be required with the normalization approach.
-	    for (i = 0; i < stop; i++) {
-
-	        geometryMaybeCollection = (isFeatureCollection ? geojson.features[i].geometry :
-	            (isFeature ? geojson.geometry : geojson));
-	        featureProperties = (isFeatureCollection ? geojson.features[i].properties :
-	            (isFeature ? geojson.properties : {}));
-	        featureBBox = (isFeatureCollection ? geojson.features[i].bbox :
-	            (isFeature ? geojson.bbox : undefined));
-	        featureId = (isFeatureCollection ? geojson.features[i].id :
-	            (isFeature ? geojson.id : undefined));
-	        isGeometryCollection = (geometryMaybeCollection) ? geometryMaybeCollection.type === 'GeometryCollection' : false;
-	        stopG = isGeometryCollection ? geometryMaybeCollection.geometries.length : 1;
-
-	        for (g = 0; g < stopG; g++) {
-	            geometry = isGeometryCollection ?
-	                geometryMaybeCollection.geometries[g] : geometryMaybeCollection;
-
-	            // Handle null Geometry
-	            if (geometry === null) {
-	                if (callback(null, featureIndex, featureProperties, featureBBox, featureId) === false) { return false; }
-	                continue;
-	            }
-	            switch (geometry.type) {
-	            case 'Point':
-	            case 'LineString':
-	            case 'MultiPoint':
-	            case 'Polygon':
-	            case 'MultiLineString':
-	            case 'MultiPolygon': {
-	                if (callback(geometry, featureIndex, featureProperties, featureBBox, featureId) === false) { return false; }
-	                break;
-	            }
-	            case 'GeometryCollection': {
-	                for (j = 0; j < geometry.geometries.length; j++) {
-	                    if (callback(geometry.geometries[j], featureIndex, featureProperties, featureBBox, featureId) === false) { return false; }
-	                }
-	                break;
-	            }
-	            default:
-	                throw new Error('Unknown Geometry Type');
-	            }
-	        }
-	        // Only increase `featureIndex` per each feature
-	        featureIndex++;
+	  _createClass(Tree, [{
+	    key: "insert",
+	    value: function insert(key, data) {
+	      this._size++;
+	      return this._root = _insert(key, data, this._root, this._comparator);
 	    }
-	}
+	    /**
+	     * Adds a key, if it is not present in the tree
+	     */
 
-	/**
-	 * Callback for geomReduce
-	 *
-	 * The first time the callback function is called, the values provided as arguments depend
-	 * on whether the reduce method has an initialValue argument.
-	 *
-	 * If an initialValue is provided to the reduce method:
-	 *  - The previousValue argument is initialValue.
-	 *  - The currentValue argument is the value of the first element present in the array.
-	 *
-	 * If an initialValue is not provided:
-	 *  - The previousValue argument is the value of the first element present in the array.
-	 *  - The currentValue argument is the value of the second element present in the array.
-	 *
-	 * @callback geomReduceCallback
-	 * @param {*} previousValue The accumulated value previously returned in the last invocation
-	 * of the callback, or initialValue, if supplied.
-	 * @param {Geometry} currentGeometry The current Geometry being processed.
-	 * @param {number} featureIndex The current index of the Feature being processed.
-	 * @param {Object} featureProperties The current Feature Properties being processed.
-	 * @param {Array<number>} featureBBox The current Feature BBox being processed.
-	 * @param {number|string} featureId The current Feature Id being processed.
-	 */
+	  }, {
+	    key: "add",
+	    value: function add(key, data) {
+	      var node = new Node$1(key, data);
+
+	      if (this._root === null) {
+	        node.left = node.right = null;
+	        this._size++;
+	        this._root = node;
+	      }
 
-	/**
-	 * Reduce geometry in any GeoJSON object, similar to Array.reduce().
-	 *
-	 * @name geomReduce
-	 * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
-	 * @param {Function} callback a method that takes (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId)
-	 * @param {*} [initialValue] Value to use as the first argument to the first call of the callback.
-	 * @returns {*} The value that results from the reduction.
-	 * @example
-	 * var features = turf.featureCollection([
-	 *     turf.point([26, 37], {foo: 'bar'}),
-	 *     turf.point([36, 53], {hello: 'world'})
-	 * ]);
-	 *
-	 * turf.geomReduce(features, function (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
-	 *   //=previousValue
-	 *   //=currentGeometry
-	 *   //=featureIndex
-	 *   //=featureProperties
-	 *   //=featureBBox
-	 *   //=featureId
-	 *   return currentGeometry
-	 * });
-	 */
-	function geomReduce(geojson, callback, initialValue) {
-	    var previousValue = initialValue;
-	    geomEach(geojson, function (currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
-	        if (featureIndex === 0 && initialValue === undefined) { previousValue = currentGeometry; }
-	        else { previousValue = callback(previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId); }
-	    });
-	    return previousValue;
-	}
+	      var comparator = this._comparator;
+	      var t = splay(key, this._root, comparator);
+	      var cmp = comparator(key, t.key);
+	      if (cmp === 0) this._root = t;else {
+	        if (cmp < 0) {
+	          node.left = t.left;
+	          node.right = t;
+	          t.left = null;
+	        } else if (cmp > 0) {
+	          node.right = t.right;
+	          node.left = t;
+	          t.right = null;
+	        }
+
+	        this._size++;
+	        this._root = node;
+	      }
+	      return this._root;
+	    }
+	    /**
+	     * @param  {Key} key
+	     * @return {Node|null}
+	     */
 
-	/**
-	 * Callback for flattenEach
-	 *
-	 * @callback flattenEachCallback
-	 * @param {Feature} currentFeature The current flattened feature being processed.
-	 * @param {number} featureIndex The current index of the Feature being processed.
-	 * @param {number} multiFeatureIndex The current index of the Multi-Feature being processed.
-	 */
+	  }, {
+	    key: "remove",
+	    value: function remove(key) {
+	      this._root = this._remove(key, this._root, this._comparator);
+	    }
+	    /**
+	     * Deletes i from the tree if it's there
+	     */
 
-	/**
-	 * Iterate over flattened features in any GeoJSON object, similar to
-	 * Array.forEach.
-	 *
-	 * @name flattenEach
-	 * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
-	 * @param {Function} callback a method that takes (currentFeature, featureIndex, multiFeatureIndex)
-	 * @example
-	 * var features = turf.featureCollection([
-	 *     turf.point([26, 37], {foo: 'bar'}),
-	 *     turf.multiPoint([[40, 30], [36, 53]], {hello: 'world'})
-	 * ]);
-	 *
-	 * turf.flattenEach(features, function (currentFeature, featureIndex, multiFeatureIndex) {
-	 *   //=currentFeature
-	 *   //=featureIndex
-	 *   //=multiFeatureIndex
-	 * });
-	 */
-	function flattenEach(geojson, callback) {
-	    geomEach(geojson, function (geometry, featureIndex, properties, bbox, id) {
-	        // Callback for single geometry
-	        var type = (geometry === null) ? null : geometry.type;
-	        switch (type) {
-	        case null:
-	        case 'Point':
-	        case 'LineString':
-	        case 'Polygon':
-	            if (callback(feature$1(geometry, properties, {bbox: bbox, id: id}), featureIndex, 0) === false) { return false; }
-	            return;
+	  }, {
+	    key: "_remove",
+	    value: function _remove(i, t, comparator) {
+	      var x;
+	      if (t === null) return null;
+	      t = splay(i, t, comparator);
+	      var cmp = comparator(i, t.key);
+
+	      if (cmp === 0) {
+	        /* found it */
+	        if (t.left === null) {
+	          x = t.right;
+	        } else {
+	          x = splay(i, t.left, comparator);
+	          x.right = t.right;
 	        }
 
-	        var geomType;
+	        this._size--;
+	        return x;
+	      }
 
-	        // Callback for multi-geometry
-	        switch (type) {
-	        case 'MultiPoint':
-	            geomType = 'Point';
-	            break;
-	        case 'MultiLineString':
-	            geomType = 'LineString';
-	            break;
-	        case 'MultiPolygon':
-	            geomType = 'Polygon';
-	            break;
-	        }
+	      return t;
+	      /* It wasn't there */
+	    }
+	    /**
+	     * Removes and returns the node with smallest key
+	     */
 
-	        for (var multiFeatureIndex = 0; multiFeatureIndex < geometry.coordinates.length; multiFeatureIndex++) {
-	            var coordinate = geometry.coordinates[multiFeatureIndex];
-	            var geom = {
-	                type: geomType,
-	                coordinates: coordinate
-	            };
-	            if (callback(feature$1(geom, properties), featureIndex, multiFeatureIndex) === false) { return false; }
+	  }, {
+	    key: "pop",
+	    value: function pop() {
+	      var node = this._root;
+
+	      if (node) {
+	        while (node.left) {
+	          node = node.left;
 	        }
-	    });
-	}
 
-	/**
-	 * Takes one or more features and returns their area in square meters.
-	 *
-	 * @name area
-	 * @param {GeoJSON} geojson input GeoJSON feature(s)
-	 * @returns {number} area in square meters
-	 * @example
-	 * var polygon = turf.polygon([[[125, -15], [113, -22], [154, -27], [144, -15], [125, -15]]]);
-	 *
-	 * var area = turf.area(polygon);
-	 *
-	 * //addToMap
-	 * var addToMap = [polygon]
-	 * polygon.properties.area = area
-	 */
-	function area(geojson) {
-	    return geomReduce(geojson, function (value, geom) {
-	        return value + calculateArea(geom);
-	    }, 0);
-	}
+	        this._root = splay(node.key, this._root, this._comparator);
+	        this._root = this._remove(node.key, this._root, this._comparator);
+	        return {
+	          key: node.key,
+	          data: node.data
+	        };
+	      }
 
-	var RADIUS$1 = 6378137;
-	// var FLATTENING_DENOM = 298.257223563;
-	// var FLATTENING = 1 / FLATTENING_DENOM;
-	// var POLAR_RADIUS = RADIUS * (1 - FLATTENING);
+	      return null;
+	    }
+	    /**
+	     * Find without splaying
+	     */
 
-	/**
-	 * Calculate Area
-	 *
-	 * @private
-	 * @param {GeoJSON} geojson GeoJSON
-	 * @returns {number} area
-	 */
-	function calculateArea(geojson) {
-	    var area = 0, i;
-	    switch (geojson.type) {
-	    case 'Polygon':
-	        return polygonArea$1(geojson.coordinates);
-	    case 'MultiPolygon':
-	        for (i = 0; i < geojson.coordinates.length; i++) {
-	            area += polygonArea$1(geojson.coordinates[i]);
-	        }
-	        return area;
-	    case 'Point':
-	    case 'MultiPoint':
-	    case 'LineString':
-	    case 'MultiLineString':
-	        return 0;
-	    case 'GeometryCollection':
-	        for (i = 0; i < geojson.geometries.length; i++) {
-	            area += calculateArea(geojson.geometries[i]);
-	        }
-	        return area;
+	  }, {
+	    key: "findStatic",
+	    value: function findStatic(key) {
+	      var current = this._root;
+	      var compare = this._comparator;
+
+	      while (current) {
+	        var cmp = compare(key, current.key);
+	        if (cmp === 0) return current;else if (cmp < 0) current = current.left;else current = current.right;
+	      }
+
+	      return null;
 	    }
-	}
+	  }, {
+	    key: "find",
+	    value: function find(key) {
+	      if (this._root) {
+	        this._root = splay(key, this._root, this._comparator);
+	        if (this._comparator(key, this._root.key) !== 0) return null;
+	      }
 
-	function polygonArea$1(coords) {
-	    var area = 0;
-	    if (coords && coords.length > 0) {
-	        area += Math.abs(ringArea$1(coords[0]));
-	        for (var i = 1; i < coords.length; i++) {
-	            area -= Math.abs(ringArea$1(coords[i]));
-	        }
+	      return this._root;
 	    }
-	    return area;
-	}
+	  }, {
+	    key: "contains",
+	    value: function contains(key) {
+	      var current = this._root;
+	      var compare = this._comparator;
+
+	      while (current) {
+	        var cmp = compare(key, current.key);
+	        if (cmp === 0) return true;else if (cmp < 0) current = current.left;else current = current.right;
+	      }
 
-	/**
-	 * @private
-	 * Calculate the approximate area of the polygon were it projected onto the earth.
-	 * Note that this area will be positive if ring is oriented clockwise, otherwise it will be negative.
-	 *
-	 * Reference:
-	 * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
-	 * Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
-	 *
-	 * @param {Array<Array<number>>} coords Ring Coordinates
-	 * @returns {number} The approximate signed geodesic area of the polygon in square meters.
-	 */
-	function ringArea$1(coords) {
-	    var p1;
-	    var p2;
-	    var p3;
-	    var lowerIndex;
-	    var middleIndex;
-	    var upperIndex;
-	    var i;
-	    var area = 0;
-	    var coordsLength = coords.length;
-
-	    if (coordsLength > 2) {
-	        for (i = 0; i < coordsLength; i++) {
-	            if (i === coordsLength - 2) { // i = N-2
-	                lowerIndex = coordsLength - 2;
-	                middleIndex = coordsLength - 1;
-	                upperIndex = 0;
-	            } else if (i === coordsLength - 1) { // i = N-1
-	                lowerIndex = coordsLength - 1;
-	                middleIndex = 0;
-	                upperIndex = 1;
-	            } else { // i = 0 to N-3
-	                lowerIndex = i;
-	                middleIndex = i + 1;
-	                upperIndex = i + 2;
-	            }
-	            p1 = coords[lowerIndex];
-	            p2 = coords[middleIndex];
-	            p3 = coords[upperIndex];
-	            area += (rad$1(p3[0]) - rad$1(p1[0])) * Math.sin(rad$1(p2[1]));
+	      return false;
+	    }
+	  }, {
+	    key: "forEach",
+	    value: function forEach(visitor, ctx) {
+	      var current = this._root;
+	      var Q = [];
+	      /* Initialize stack s */
+
+	      var done = false;
+
+	      while (!done) {
+	        if (current !== null) {
+	          Q.push(current);
+	          current = current.left;
+	        } else {
+	          if (Q.length !== 0) {
+	            current = Q.pop();
+	            visitor.call(ctx, current);
+	            current = current.right;
+	          } else done = true;
 	        }
+	      }
 
-	        area = area * RADIUS$1 * RADIUS$1 / 2;
+	      return this;
 	    }
+	    /**
+	     * Walk key range from `low` to `high`. Stops if `fn` returns a value.
+	     */
 
-	    return area;
-	}
+	  }, {
+	    key: "range",
+	    value: function range(low, high, fn, ctx) {
+	      var Q = [];
+	      var compare = this._comparator;
+	      var node = this._root;
+	      var cmp;
+
+	      while (Q.length !== 0 || node) {
+	        if (node) {
+	          Q.push(node);
+	          node = node.left;
+	        } else {
+	          node = Q.pop();
+	          cmp = compare(node.key, high);
 
-	function rad$1(_) {
-	    return _ * Math.PI / 180;
-	}
+	          if (cmp > 0) {
+	            break;
+	          } else if (compare(node.key, low) >= 0) {
+	            if (fn.call(ctx, node)) return this; // stop if smth is returned
+	          }
 
-	/**
-	 * Get Geometry from Feature or Geometry Object
-	 *
-	 * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
-	 * @returns {Geometry|null} GeoJSON Geometry Object
-	 * @throws {Error} if geojson is not a Feature or Geometry Object
-	 * @example
-	 * var point = {
-	 *   "type": "Feature",
-	 *   "properties": {},
-	 *   "geometry": {
-	 *     "type": "Point",
-	 *     "coordinates": [110, 40]
-	 *   }
-	 * }
-	 * var geom = turf.getGeom(point)
-	 * //={"type": "Point", "coordinates": [110, 40]}
-	 */
-	function getGeom(geojson) {
-	    if (!geojson) { throw new Error('geojson is required'); }
-	    if (geojson.geometry !== undefined) { return geojson.geometry; }
-	    if (geojson.coordinates || geojson.geometries) { return geojson; }
-	    throw new Error('geojson must be a valid Feature or Geometry Object');
-	}
+	          node = node.right;
+	        }
+	      }
 
-	/**
-	 * Finds the difference between two {@link Polygon|polygons} by clipping the second polygon from the first.
-	 *
-	 * @name difference
-	 * @param {Feature<Polygon|MultiPolygon>} polygon1 input Polygon feature
-	 * @param {Feature<Polygon|MultiPolygon>} polygon2 Polygon feature to difference from polygon1
-	 * @returns {Feature<Polygon|MultiPolygon>|null} a Polygon or MultiPolygon feature showing the area of `polygon1` excluding the area of `polygon2` (if empty returns `null`)
-	 * @example
-	 * var polygon1 = turf.polygon([[
-	 *   [128, -26],
-	 *   [141, -26],
-	 *   [141, -21],
-	 *   [128, -21],
-	 *   [128, -26]
-	 * ]], {
-	 *   "fill": "#F00",
-	 *   "fill-opacity": 0.1
-	 * });
-	 * var polygon2 = turf.polygon([[
-	 *   [126, -28],
-	 *   [140, -28],
-	 *   [140, -20],
-	 *   [126, -20],
-	 *   [126, -28]
-	 * ]], {
-	 *   "fill": "#00F",
-	 *   "fill-opacity": 0.1
-	 * });
-	 *
-	 * var difference = turf.difference(polygon1, polygon2);
-	 *
-	 * //addToMap
-	 * var addToMap = [polygon1, polygon2, difference];
-	 */
-	function difference(polygon1, polygon2) {
-	    var geom1 = getGeom(polygon1);
-	    var geom2 = getGeom(polygon2);
-	    var properties = polygon1.properties || {};
+	      return this;
+	    }
+	    /**
+	     * Returns array of keys
+	     */
+
+	  }, {
+	    key: "keys",
+	    value: function keys() {
+	      var keys = [];
+	      this.forEach(function (_ref) {
+	        var key = _ref.key;
+	        return keys.push(key);
+	      });
+	      return keys;
+	    }
+	    /**
+	     * Returns array of all the data in the nodes
+	     */
 
-	    // Issue #721 - JSTS can't handle empty polygons
-	    geom1 = removeEmptyPolygon(geom1);
-	    geom2 = removeEmptyPolygon(geom2);
-	    if (!geom1) { return null; }
-	    if (!geom2) { return feature$1(geom1, properties); }
+	  }, {
+	    key: "values",
+	    value: function values() {
+	      var values = [];
+	      this.forEach(function (_ref2) {
+	        var data = _ref2.data;
+	        return values.push(data);
+	      });
+	      return values;
+	    }
+	  }, {
+	    key: "min",
+	    value: function min() {
+	      if (this._root) return this.minNode(this._root).key;
+	      return null;
+	    }
+	  }, {
+	    key: "max",
+	    value: function max() {
+	      if (this._root) return this.maxNode(this._root).key;
+	      return null;
+	    }
+	  }, {
+	    key: "minNode",
+	    value: function minNode() {
+	      var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._root;
+	      if (t) while (t.left) {
+	        t = t.left;
+	      }
+	      return t;
+	    }
+	  }, {
+	    key: "maxNode",
+	    value: function maxNode() {
+	      var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._root;
+	      if (t) while (t.right) {
+	        t = t.right;
+	      }
+	      return t;
+	    }
+	    /**
+	     * Returns node at given index
+	     */
 
-	    // JSTS difference operation
-	    var reader = new GeoJSONReader();
-	    var a = reader.read(geom1);
-	    var b = reader.read(geom2);
-	    var differenced = OverlayOp.difference(a, b);
-	    if (differenced.isEmpty()) { return null; }
-	    var writer = new GeoJSONWriter();
-	    var geom = writer.write(differenced);
+	  }, {
+	    key: "at",
+	    value: function at(index) {
+	      var current = this._root;
+	      var done = false;
+	      var i = 0;
+	      var Q = [];
 
-	    return feature$1(geom, properties);
-	}
+	      while (!done) {
+	        if (current) {
+	          Q.push(current);
+	          current = current.left;
+	        } else {
+	          if (Q.length > 0) {
+	            current = Q.pop();
+	            if (i === index) return current;
+	            i++;
+	            current = current.right;
+	          } else done = true;
+	        }
+	      }
 
-	/**
-	 * Detect Empty Polygon
-	 *
-	 * @private
-	 * @param {Geometry<Polygon|MultiPolygon>} geom Geometry Object
-	 * @returns {Geometry<Polygon|MultiPolygon>|null} removed any polygons with no areas
-	 */
-	function removeEmptyPolygon(geom) {
-	    switch (geom.type) {
-	    case 'Polygon':
-	        if (area(geom) > 1) { return geom; }
-	        return null;
-	    case 'MultiPolygon':
-	        var coordinates = [];
-	        flattenEach(geom, function (feature$$1) {
-	            if (area(feature$$1) > 1) { coordinates.push(feature$$1.geometry.coordinates); }
-	        });
-	        if (coordinates.length) { return {type: 'MultiPolygon', coordinates: coordinates}; }
+	      return null;
 	    }
-	}
+	  }, {
+	    key: "next",
+	    value: function next(d) {
+	      var root = this._root;
+	      var successor = null;
 
-	/**
-	 * Takes two or more {@link Polygon|polygons} and returns a combined polygon. If the input polygons are not contiguous, this function returns a {@link MultiPolygon} feature.
-	 *
-	 * @name union
-	 * @param {...Feature<Polygon>} A polygon to combine
-	 * @returns {Feature<(Polygon|MultiPolygon)>} a combined {@link Polygon} or {@link MultiPolygon} feature
-	 * @example
-	 * var poly1 = turf.polygon([[
-	 *     [-82.574787, 35.594087],
-	 *     [-82.574787, 35.615581],
-	 *     [-82.545261, 35.615581],
-	 *     [-82.545261, 35.594087],
-	 *     [-82.574787, 35.594087]
-	 * ]], {"fill": "#0f0"});
-	 * var poly2 = turf.polygon([[
-	 *     [-82.560024, 35.585153],
-	 *     [-82.560024, 35.602602],
-	 *     [-82.52964, 35.602602],
-	 *     [-82.52964, 35.585153],
-	 *     [-82.560024, 35.585153]
-	 * ]], {"fill": "#00f"});
-	 *
-	 * var union = turf.union(poly1, poly2);
-	 *
-	 * //addToMap
-	 * var addToMap = [poly1, poly2, union];
-	 */
-	function union$1() {
-	    var arguments$1 = arguments;
+	      if (d.right) {
+	        successor = d.right;
 
-	    var reader = new GeoJSONReader();
-	    var result = reader.read(JSON.stringify(arguments[0].geometry));
+	        while (successor.left) {
+	          successor = successor.left;
+	        }
 
-	    for (var i = 1; i < arguments.length; i++) {
-	        result = UnionOp.union(result, reader.read(JSON.stringify(arguments$1[i].geometry)));
-	    }
+	        return successor;
+	      }
 
-	    var writer = new GeoJSONWriter();
-	    result = writer.write(result);
+	      var comparator = this._comparator;
 
-	    return {
-	        type: 'Feature',
-	        geometry: result,
-	        properties: arguments[0].properties
-	    };
-	}
+	      while (root) {
+	        var cmp = comparator(d.key, root.key);
+	        if (cmp === 0) break;else if (cmp < 0) {
+	          successor = root;
+	          root = root.left;
+	        } else root = root.right;
+	      }
 
-	// Reduce an array of locations into a single GeoJSON feature
-	function _locationReducer(accumulator, location) {
-	  /* eslint-disable no-console, no-invalid-this */
-	  var result;
-	  try {
-	    var resolved = this.resolveLocation(location);
-	    if (!resolved || !resolved.feature) {
-	      console.warn(("Warning:  Couldn't resolve location \"" + location + "\""));
-	      return accumulator;
+	      return successor;
 	    }
-	    result = !accumulator ? resolved.feature : union$1(accumulator, resolved.feature);
-	  } catch (e) {
-	    console.warn(("Warning:  Error resolving location \"" + location + "\""));
-	    console.warn(e);
-	    result = accumulator;
-	  }
-
-	  return result;
-	  /* eslint-enable no-console, no-invalid-this */
-	}
+	  }, {
+	    key: "prev",
+	    value: function prev(d) {
+	      var root = this._root;
+	      var predecessor = null;
 
+	      if (d.left !== null) {
+	        predecessor = d.left;
 
+	        while (predecessor.right) {
+	          predecessor = predecessor.right;
+	        }
 
-	function _cloneDeep(obj) {
-	  return JSON.parse(JSON.stringify(obj));
-	}
+	        return predecessor;
+	      }
 
+	      var comparator = this._comparator;
 
-	var defaultExport = function defaultExport(fc) {
-	  var this$1 = this;
+	      while (root) {
+	        var cmp = comparator(d.key, root.key);
+	        if (cmp === 0) break;else if (cmp < 0) root = root.left;else {
+	          predecessor = root;
+	          root = root.right;
+	        }
+	      }
 
-	  this._cache = {};
+	      return predecessor;
+	    }
+	  }, {
+	    key: "clear",
+	    value: function clear() {
+	      this._root = null;
+	      this._size = 0;
+	      return this;
+	    }
+	  }, {
+	    key: "toList",
+	    value: function toList() {
+	      return _toList(this._root);
+	    }
+	    /**
+	     * Bulk-load items. Both array have to be same size
+	     */
 
-	  // process input FeatureCollection
-	  if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
-	    fc.features.forEach(function (feature) {
-	      feature.properties = feature.properties || {};
-	      var props = feature.properties;
+	  }, {
+	    key: "load",
+	    value: function load(keys) {
+	      var values = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+	      var presort = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+	      var size = keys.length;
+	      var comparator = this._comparator; // sort if needed
+
+	      if (presort) sort$1(keys, values, 0, size - 1, comparator);
+
+	      if (this._root === null) {
+	        // empty tree
+	        this._root = loadRecursive$1(keys, values, 0, size);
+	        this._size = size;
+	      } else {
+	        // that re-builds the whole tree from two in-order traversals
+	        var mergedList = mergeLists(this.toList(), createList(keys, values), comparator);
+	        size = this._size + size;
+	        this._root = sortedListToBST({
+	          head: mergedList
+	        }, 0, size);
+	      }
 
-	      // get `id` from either `id` or `properties`
-	      var id = feature.id || props.id;
-	      if (!id || !/^\S+\.geojson$/i.test(id)) { return; }
+	      return this;
+	    }
+	  }, {
+	    key: "isEmpty",
+	    value: function isEmpty() {
+	      return this._root === null;
+	    }
+	  }, {
+	    key: "toString",
+	    value: function toString() {
+	      var printNode = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : function (n) {
+	        return String(n.key);
+	      };
+	      var out = [];
+	      printRow(this._root, '', true, function (v) {
+	        return out.push(v);
+	      }, printNode);
+	      return out.join('');
+	    }
+	  }, {
+	    key: "update",
+	    value: function update(key, newKey, newData) {
+	      var comparator = this._comparator;
 
-	      // ensure id exists and is lowercase
-	      id = id.toLowerCase();
-	      feature.id = id;
-	      props.id = id;
+	      var _split2 = _split(key, this._root, comparator),
+	          left = _split2.left,
+	          right = _split2.right;
 
-	      // ensure area property exists
-	      if (!props.area) {
-	        var area = geojsonArea.geometry(feature.geometry) / 1e6;// m² to km²
-	        props.area = Number(area.toFixed(2));
+	      if (comparator(key, newKey) < 0) {
+	        right = _insert(newKey, newData, right, comparator);
+	      } else {
+	        left = _insert(newKey, newData, left, comparator);
 	      }
 
-	      this$1._cache[id] = feature;
-	    });
+	      this._root = merge$4(left, right, comparator);
+	    }
+	  }, {
+	    key: "split",
+	    value: function split(key) {
+	      return _split(key, this._root, this._comparator);
+	    }
+	  }, {
+	    key: "size",
+	    get: function get() {
+	      return this._size;
+	    }
+	  }, {
+	    key: "root",
+	    get: function get() {
+	      return this._root;
+	    }
+	  }]);
+
+	  return Tree;
+	}();
+
+	function loadRecursive$1(keys, values, start, end) {
+	  var size = end - start;
+
+	  if (size > 0) {
+	    var middle = start + Math.floor(size / 2);
+	    var key = keys[middle];
+	    var data = values[middle];
+	    var node = new Node$1(key, data);
+	    node.left = loadRecursive$1(keys, values, start, middle);
+	    node.right = loadRecursive$1(keys, values, middle + 1, end);
+	    return node;
 	  }
 
-	  // Replace CountryCoder world geometry to have a polygon covering the world.
-	  var world = _cloneDeep(feature('Q2'));
-	  world.geometry = {
-	    type: 'Polygon',
-	    coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]
-	  };
-	  world.id = 'Q2';
-	  world.properties.id = 'Q2';
-	  world.properties.area = geojsonArea.geometry(world.geometry) / 1e6;// m² to km²
-	  this._cache.Q2 = world;
-	};
+	  return null;
+	}
 
+	function createList(keys, values) {
+	  var head = new Node$1(null, null);
+	  var p = head;
 
-	// validateLocation
-	//
-	// Pass a `location` identifier
-	// Returns a result like
-	// {
-	//   type:   'point', 'geojson', or 'countrycoder'
-	//   location:the queried location
-	//   id:      a unique identifier
-	// }
-	//or `null` if the location is invalid
-	//
-	defaultExport.prototype.validateLocation = function validateLocation (location) {
-	  if (Array.isArray(location)) { // a [lon,lat] coordinate pair?
-	    if (location.length === 2 && Number.isFinite(location[0]) && Number.isFinite(location[1]) &&
-	      location[0] >= -180 && location[0] <= 180 && location[1] >= -90 && location[1] <= 90
-	    ) {
-	      var id = '[' + location.toString() + ']';
-	      return { type: 'point', location: location, id: id };
-	    }
+	  for (var i = 0; i < keys.length; i++) {
+	    p = p.next = new Node$1(keys[i], values[i]);
+	  }
 
-	  } else if (typeof location === 'string' && /^\S+\.geojson$/i.test(location)) { // a .geojson filename?
-	    var id$1 = location.toLowerCase();
-	    if (this._cache[id$1]) {
-	      return { type: 'geojson', location: location, id: id$1 };
-	    }
+	  p.next = null;
+	  return head.next;
+	}
+
+	function _toList(root) {
+	  var current = root;
+	  var Q = [];
+	  var done = false;
+	  var head = new Node$1(null, null);
+	  var p = head;
 
-	  } else if (typeof location === 'string' || typeof location === 'number') { // a country-coder value?
-	    var feature$1 = feature(location);
-	    if (feature$1) {
-	      // Use wikidata QID as the identifier, since that seems to be the only
-	      // property that everything in CountryCoder is guaranteed to have.
-	      var id$2 = feature$1.properties.wikidata;
-	      return { type: 'countrycoder', location: location, id: id$2 };
+	  while (!done) {
+	    if (current) {
+	      Q.push(current);
+	      current = current.left;
+	    } else {
+	      if (Q.length > 0) {
+	        current = p = p.next = Q.pop();
+	        current = current.right;
+	      } else done = true;
 	    }
 	  }
 
-	  return null;
-	};
+	  p.next = null; // that'll work even if the tree was empty
+
+	  return head.next;
+	}
 
+	function sortedListToBST(list, start, end) {
+	  var size = end - start;
 
-	// resolveLocation
-	//
-	// Pass a `location` identifier
-	// Returns a result like
-	// {
-	//   type:    'point', 'geojson', or 'countrycoder'
-	//   location:the queried location
-	//   id:      a unique identifier
-	//   feature: the geojson feature
-	// }
-	//or `null` if the location is invalid
-	//
-	defaultExport.prototype.resolveLocation = function resolveLocation (location) {
-	  var valid = this.validateLocation(location);
-	  if (!valid) { return null; }
-
-	  // return a result from cache if we can
-	  if (this._cache[valid.id]) {
-	    return Object.assign(valid, { feature: this._cache[valid.id] });
-	  }
-
-	  // a [lon,lat] coordinate pair?
-	  if (valid.type === 'point') {
-	    var RADIUS = 25000;// meters
-	    var EDGES = 10;
-	    var PRECISION = 3;
-	    var area = Math.PI * RADIUS * RADIUS / 1e6;   // m² to km²
-	    var feature$1 = this._cache[valid.id] = geojsonPrecision({
-	      type: 'Feature',
-	      id: valid.id,
-	      properties: { id: valid.id, area: Number(area.toFixed(2)) },
-	      geometry: circleToPolygon(location, RADIUS, EDGES)
-	    }, PRECISION);
-	    return Object.assign(valid, { feature: feature$1 });
-
-	  // a .geojson filename?
-	  } else if (valid.type === 'geojson') ; else if (valid.type === 'countrycoder') {
-	    var feature$1$1 = _cloneDeep(feature(valid.id));
-	    var props = feature$1$1.properties;
-
-	    // -> This block of code is weird and requires some explanation. <-
-	    // CountryCoder includes higher level features which are made up of members.
-	    // These features don't have their own geometry, but CountryCoder provides an
-	    // `aggregateFeature` method to combine these members into a MultiPolygon.
-	    // BUT, when we try to actually work with these aggregated MultiPolygons,
-	    // Turf/JSTS gets crashy because of topography bugs.
-	    // SO, we'll aggregate the features ourselves by unioning them together.
-	    // This approach also has the benefit of removing all the internal boaders and
-	    // simplifying the regional polygons a lot.
-	    if (Array.isArray(props.members)) {
-	      var seed = feature$1$1.geometry ? feature$1$1 : null;
-	      var aggregate = props.members.reduce(_locationReducer.bind(this), seed);
-	      feature$1$1.geometry = aggregate.geometry;
-	    }
-
-	    // ensure area property exists
-	    if (!props.area) {
-	      var area$1 = geojsonArea.geometry(feature$1$1.geometry) / 1e6;// m² to km²
-	      props.area = Number(area$1.toFixed(2));
-	    }
-
-	    // ensure id property exists
-	    feature$1$1.id = valid.id;
-	    props.id = valid.id;
-
-	    this._cache[valid.id] = feature$1$1;
-	    return Object.assign(valid, { feature: feature$1$1 });
+	  if (size > 0) {
+	    var middle = start + Math.floor(size / 2);
+	    var left = sortedListToBST(list, start, middle);
+	    var root = list.head;
+	    root.left = left;
+	    list.head = list.head.next;
+	    root.right = sortedListToBST(list, middle + 1, end);
+	    return root;
 	  }
 
 	  return null;
-	};
-
+	}
 
-	// resolveLocationSet
-	//
-	// Pass a `locationSet` Object like:
-	// `{ include: [ Array ], exclude: [ Array ] }`
-	// Returns a stable identifier string of the form:
-	// "+[included]-[excluded]"
-	//
-	defaultExport.prototype.resolveLocationSet = function resolveLocationSet (locationSet) {
-	  locationSet = locationSet || {};
-	  var resolve = this.resolveLocation.bind(this);
-	  var include = (locationSet.include || []).map(resolve).filter(Boolean);
-	  var exclude = (locationSet.exclude || []).map(resolve).filter(Boolean);
+	function mergeLists(l1, l2, compare) {
+	  var head = new Node$1(null, null); // dummy
 
-	  if (!include.length) {
-	    include = [resolve('Q2')]; // default to 'the world'
-	  }
+	  var p = head;
+	  var p1 = l1;
+	  var p2 = l2;
 
-	  // return quickly if it's a single included location..
-	  if (include.length === 1 && exclude.length === 0) {
-	    return include[0].feature;
-	  }
+	  while (p1 !== null && p2 !== null) {
+	    if (compare(p1.key, p2.key) < 0) {
+	      p.next = p1;
+	      p1 = p1.next;
+	    } else {
+	      p.next = p2;
+	      p2 = p2.next;
+	    }
 
-	  // generate stable identifier
-	  include.sort(sortFeatures);
-	  var id = '+[' + include.map(function (d) { return d.id; }).join(',') + ']';
-	  if (exclude.length) {
-	    exclude.sort(sortFeatures);
-	    id += '-[' + exclude.map(function (d) { return d.id; }).join(',') + ']';
+	    p = p.next;
 	  }
 
-	  // return cached?
-	  if (this._cache[id]) {
-	    return this._cache[id];
+	  if (p1 !== null) {
+	    p.next = p1;
+	  } else if (p2 !== null) {
+	    p.next = p2;
 	  }
 
-	  // calculate unions
-	  var includeGeoJSON = include.map(function (d) { return d.location; }).reduce(_locationReducer.bind(this), null);
-	  var excludeGeoJSON = exclude.map(function (d) { return d.location; }).reduce(_locationReducer.bind(this), null);
-
-	  // calculate difference, update area and return result
-	  var resultGeoJSON = excludeGeoJSON ? difference(includeGeoJSON, excludeGeoJSON) : includeGeoJSON;
-	  var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6;// m² to km²
-	  resultGeoJSON.id = id;
-	  resultGeoJSON.properties = { id: id, area: Number(area.toFixed(2)) };
+	  return head.next;
+	}
 
-	  return this._cache[id] = resultGeoJSON;
+	function sort$1(keys, values, left, right, compare) {
+	  if (left >= right) return;
+	  var pivot = keys[left + right >> 1];
+	  var i = left - 1;
+	  var j = right + 1;
 
+	  while (true) {
+	    do {
+	      i++;
+	    } while (compare(keys[i], pivot) < 0);
 
-	  // Sorting the location lists is ok because they end up unioned together.
-	  // This sorting makes it possible to generate a deterministic id.
-	  function sortFeatures(a, b) {
-	    var rank = { countrycoder: 1, geojson: 2, point: 3 };
-	    var aRank = rank[a.type];
-	    var bRank = rank[b.type];
+	    do {
+	      j--;
+	    } while (compare(keys[j], pivot) > 0);
 
-	    return (aRank > bRank) ? 1
-	      : (aRank < bRank) ? -1
-	      : a.id.localeCompare(b.id);
+	    if (i >= j) break;
+	    var tmp = keys[i];
+	    keys[i] = keys[j];
+	    keys[j] = tmp;
+	    tmp = values[i];
+	    values[i] = values[j];
+	    values[j] = tmp;
 	  }
-	};
 
+	  sort$1(keys, values, left, j, compare);
+	  sort$1(keys, values, j + 1, right, compare);
+	}
 
-	defaultExport.prototype.cache = function cache () {
-	  return this._cache;
-	};
+	function _classCallCheck$1(instance, Constructor) {
+	  if (!(instance instanceof Constructor)) {
+	    throw new TypeError("Cannot call a class as a function");
+	  }
+	}
 
-	var _oci = null;
+	function _defineProperties$1(target, props) {
+	  for (var i = 0; i < props.length; i++) {
+	    var descriptor = props[i];
+	    descriptor.enumerable = descriptor.enumerable || false;
+	    descriptor.configurable = true;
+	    if ("value" in descriptor) descriptor.writable = true;
+	    Object.defineProperty(target, descriptor.key, descriptor);
+	  }
+	}
 
-	function uiSuccess(context) {
-	  var MAXEVENTS = 2;
-	  var dispatch$1 = dispatch('cancel');
-	  var _changeset;
-	  var _location;
-	  ensureOSMCommunityIndex();   // start fetching the data
+	function _createClass$1(Constructor, protoProps, staticProps) {
+	  if (protoProps) _defineProperties$1(Constructor.prototype, protoProps);
+	  if (staticProps) _defineProperties$1(Constructor, staticProps);
+	  return Constructor;
+	}
+	/**
+	 * A bounding box has the format:
+	 *
+	 *  { ll: { x: xmin, y: ymin }, ur: { x: xmax, y: ymax } }
+	 *
+	 */
 
 
-	  function ensureOSMCommunityIndex() {
-	    var data = _mainFileFetcher;
-	    return Promise.all([ data.get('oci_resources'), data.get('oci_features') ])
-	      .then(function (vals) {
-	        if (_oci) { return _oci; }
-
-	        var ociResources = vals[0].resources;
-	        var loco = new defaultExport(vals[1]);
-	        var ociFeatures = {};
-
-	        Object.values(ociResources).forEach(function (resource) {
-	          var feature = loco.resolveLocationSet(resource.locationSet);
-	          var ociFeature = ociFeatures[feature.id];
-	          if (!ociFeature) {
-	            ociFeature = JSON.parse(JSON.stringify(feature));  // deep clone
-	            ociFeature.properties.resourceIDs = new Set();
-	            ociFeatures[feature.id] = ociFeature;
-	          }
-	          ociFeature.properties.resourceIDs.add(resource.id);
-	        });
+	var isInBbox = function isInBbox(bbox, point) {
+	  return bbox.ll.x <= point.x && point.x <= bbox.ur.x && bbox.ll.y <= point.y && point.y <= bbox.ur.y;
+	};
+	/* Returns either null, or a bbox (aka an ordered pair of points)
+	 * If there is only one point of overlap, a bbox with identical points
+	 * will be returned */
 
-	        return _oci = {
-	          features: ociFeatures,
-	          resources: ociResources,
-	          query: whichPolygon_1({ type: 'FeatureCollection', features: Object.values(ociFeatures) })
-	        };
-	      });
-	  }
 
+	var getBboxOverlap = function getBboxOverlap(b1, b2) {
+	  // check if the bboxes overlap at all
+	  if (b2.ur.x < b1.ll.x || b1.ur.x < b2.ll.x || b2.ur.y < b1.ll.y || b1.ur.y < b2.ll.y) return null; // find the middle two X values
 
-	  // string-to-date parsing in JavaScript is weird
-	  function parseEventDate(when) {
-	    if (!when) { return; }
+	  var lowerX = b1.ll.x < b2.ll.x ? b2.ll.x : b1.ll.x;
+	  var upperX = b1.ur.x < b2.ur.x ? b1.ur.x : b2.ur.x; // find the middle two Y values
 
-	    var raw = when.trim();
-	    if (!raw) { return; }
+	  var lowerY = b1.ll.y < b2.ll.y ? b2.ll.y : b1.ll.y;
+	  var upperY = b1.ur.y < b2.ur.y ? b1.ur.y : b2.ur.y; // put those middle values together to get the overlap
 
-	    if (!/Z$/.test(raw)) {   // if no trailing 'Z', add one
-	      raw += 'Z';            // this forces date to be parsed as a UTC date
+	  return {
+	    ll: {
+	      x: lowerX,
+	      y: lowerY
+	    },
+	    ur: {
+	      x: upperX,
+	      y: upperY
 	    }
+	  };
+	};
+	/* Javascript doesn't do integer math. Everything is
+	 * floating point with percision Number.EPSILON.
+	 *
+	 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/EPSILON
+	 */
 
-	    var parsed = new Date(raw);
-	    return new Date(parsed.toUTCString().substr(0, 25));  // convert to local timezone
-	  }
 
+	var epsilon$2 = Number.EPSILON; // IE Polyfill
 
-	  function success(selection) {
-	    var header = selection
-	      .append('div')
-	      .attr('class', 'header fillL');
-
-	    header
-	      .append('h3')
-	      .text(_t('success.just_edited'));
-
-	    header
-	      .append('button')
-	      .attr('class', 'close')
-	      .on('click', function () { return dispatch$1.call('cancel'); })
-	      .call(svgIcon('#iD-icon-close'));
-
-	    var body = selection
-	      .append('div')
-	      .attr('class', 'body save-success fillL');
-
-	    var summary = body
-	      .append('div')
-	      .attr('class', 'save-summary');
-
-	    summary
-	      .append('h3')
-	      .text(_t('success.thank_you' + (_location ? '_location' : ''), { where: _location }));
-
-	    summary
-	      .append('p')
-	      .text(_t('success.help_html'))
-	      .append('a')
-	      .attr('class', 'link-out')
-	      .attr('target', '_blank')
-	      .attr('tabindex', -1)
-	      .attr('href', _t('success.help_link_url'))
-	      .call(svgIcon('#iD-icon-out-link', 'inline'))
-	      .append('span')
-	      .text(_t('success.help_link_text'));
+	if (epsilon$2 === undefined) epsilon$2 = Math.pow(2, -52);
+	var EPSILON_SQ = epsilon$2 * epsilon$2;
+	/* FLP comparator */
 
-	    var osm = context.connection();
-	    if (!osm) { return; }
+	var cmp = function cmp(a, b) {
+	  // check if they're both 0
+	  if (-epsilon$2 < a && a < epsilon$2) {
+	    if (-epsilon$2 < b && b < epsilon$2) {
+	      return 0;
+	    }
+	  } // check if they're flp equal
 
-	    var changesetURL = osm.changesetURL(_changeset.id);
 
-	    var table = summary
-	      .append('table')
-	      .attr('class', 'summary-table');
-
-	    var row = table
-	      .append('tr')
-	      .attr('class', 'summary-row');
-
-	    row
-	      .append('td')
-	      .attr('class', 'cell-icon summary-icon')
-	      .append('a')
-	      .attr('target', '_blank')
-	      .attr('href', changesetURL)
-	      .append('svg')
-	      .attr('class', 'logo-small')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-osm');
-
-	    var summaryDetail = row
-	      .append('td')
-	      .attr('class', 'cell-detail summary-detail');
-
-	    summaryDetail
-	      .append('a')
-	      .attr('class', 'cell-detail summary-view-on-osm')
-	      .attr('target', '_blank')
-	      .attr('href', changesetURL)
-	      .text(_t('success.view_on_osm'));
-
-	    summaryDetail
-	      .append('div')
-	      .html(_t('success.changeset_id', {
-	        changeset_id: ("<a href=\"" + changesetURL + "\" target=\"_blank\">" + (_changeset.id) + "</a>")
-	      }));
+	  var ab = a - b;
 
+	  if (ab * ab < EPSILON_SQ * a * b) {
+	    return 0;
+	  } // normal comparison
 
-	    // Get OSM community index features intersecting the map..
-	    ensureOSMCommunityIndex()
-	      .then(function (oci) {
-	        var communities = [];
-	        var properties = oci.query(context.map().center(), true) || [];
-
-	        // Gather the communities from the result
-	        properties.forEach(function (props) {
-	          var resourceIDs = Array.from(props.resourceIDs);
-	          resourceIDs.forEach(function (resourceID) {
-	            var resource = oci.resources[resourceID];
-	            communities.push({
-	              area: props.area || Infinity,
-	              order: resource.order || 0,
-	              resource: resource
-	            });
-	          });
-	        });
 
-	        // sort communities by feature area ascending, community order descending
-	        communities.sort(function (a, b) { return a.area - b.area || b.order - a.order; });
+	  return a < b ? -1 : 1;
+	};
+	/**
+	 * This class rounds incoming values sufficiently so that
+	 * floating points problems are, for the most part, avoided.
+	 *
+	 * Incoming points are have their x & y values tested against
+	 * all previously seen x & y values. If either is 'too close'
+	 * to a previously seen value, it's value is 'snapped' to the
+	 * previously seen value.
+	 *
+	 * All points should be rounded by this class before being
+	 * stored in any data structures in the rest of this algorithm.
+	 */
 
-	        body
-	          .call(showCommunityLinks, communities.map(function (c) { return c.resource; }));
-	      });
-	  }
 
+	var PtRounder = /*#__PURE__*/function () {
+	  function PtRounder() {
+	    _classCallCheck$1(this, PtRounder);
 
-	  function showCommunityLinks(selection, resources) {
-	    var communityLinks = selection
-	      .append('div')
-	      .attr('class', 'save-communityLinks');
-
-	    communityLinks
-	      .append('h3')
-	      .text(_t('success.like_osm'));
-
-	    var table = communityLinks
-	      .append('table')
-	      .attr('class', 'community-table');
-
-	    var row = table.selectAll('.community-row')
-	      .data(resources);
-
-	    var rowEnter = row.enter()
-	      .append('tr')
-	      .attr('class', 'community-row');
-
-	    rowEnter
-	      .append('td')
-	      .attr('class', 'cell-icon community-icon')
-	      .append('a')
-	      .attr('target', '_blank')
-	      .attr('href', function (d) { return d.url; })
-	      .append('svg')
-	      .attr('class', 'logo-small')
-	      .append('use')
-	      .attr('xlink:href', function (d) { return ("#community-" + (d.type)); });
-
-	    var communityDetail = rowEnter
-	      .append('td')
-	      .attr('class', 'cell-detail community-detail');
-
-	    communityDetail
-	      .each(showCommunityDetails);
-
-	    communityLinks
-	      .append('div')
-	      .attr('class', 'community-missing')
-	      .text(_t('success.missing'))
-	      .append('a')
-	      .attr('class', 'link-out')
-	      .attr('target', '_blank')
-	      .attr('tabindex', -1)
-	      .call(svgIcon('#iD-icon-out-link', 'inline'))
-	      .attr('href', 'https://github.com/osmlab/osm-community-index/issues')
-	      .append('span')
-	      .text(_t('success.tell_us'));
+	    this.reset();
 	  }
 
-
-	  function showCommunityDetails(d) {
-	    var selection = select(this);
-	    var communityID = d.id;
-	    var replacements = {
-	      url: linkify(d.url),
-	      signupUrl: linkify(d.signupUrl || d.url)
-	    };
-
-	    selection
-	      .append('div')
-	      .attr('class', 'community-name')
-	      .append('a')
-	      .attr('target', '_blank')
-	      .attr('href', d.url)
-	      .text(_t(("community." + (d.id) + ".name")));
-
-	    var descriptionHTML = _t(("community." + (d.id) + ".description"), replacements);
-
-	    if (d.type === 'reddit') {   // linkify subreddits  #4997
-	      descriptionHTML = descriptionHTML
-	        .replace(/(\/r\/\w*\/*)/i, function (match) { return linkify(d.url, match); });
-	    }
-
-	    selection
-	      .append('div')
-	      .attr('class', 'community-description')
-	      .html(descriptionHTML);
-
-	    if (d.extendedDescription || (d.languageCodes && d.languageCodes.length)) {
-	      selection
-	        .append('div')
-	        .call(uiDisclosure(context, ("community-more-" + (d.id)), false)
-	          .expanded(false)
-	          .updatePreference(false)
-	          .title(_t('success.more'))
-	          .content(showMore)
-	        );
+	  _createClass$1(PtRounder, [{
+	    key: "reset",
+	    value: function reset() {
+	      this.xRounder = new CoordRounder();
+	      this.yRounder = new CoordRounder();
+	    }
+	  }, {
+	    key: "round",
+	    value: function round(x, y) {
+	      return {
+	        x: this.xRounder.round(x),
+	        y: this.yRounder.round(y)
+	      };
 	    }
+	  }]);
 
-	    var nextEvents = (d.events || [])
-	      .map(function (event) {
-	        event.date = parseEventDate(event.when);
-	        return event;
-	      })
-	      .filter(function (event) {      // date is valid and future (or today)
-	        var t = event.date.getTime();
-	        var now = (new Date()).setHours(0,0,0,0);
-	        return !isNaN(t) && t >= now;
-	      })
-	      .sort(function (a, b) {       // sort by date ascending
-	        return a.date < b.date ? -1 : a.date > b.date ? 1 : 0;
-	      })
-	      .slice(0, MAXEVENTS);   // limit number of events shown
+	  return PtRounder;
+	}();
 
-	    if (nextEvents.length) {
-	      selection
-	        .append('div')
-	        .call(uiDisclosure(context, ("community-events-" + (d.id)), false)
-	          .expanded(false)
-	          .updatePreference(false)
-	          .title(_t('success.events'))
-	          .content(showNextEvents)
-	        )
-	        .select('.hide-toggle')
-	        .append('span')
-	        .attr('class', 'badge-text')
-	        .text(nextEvents.length);
-	    }
+	var CoordRounder = /*#__PURE__*/function () {
+	  function CoordRounder() {
+	    _classCallCheck$1(this, CoordRounder);
 
+	    this.tree = new Tree(); // preseed with 0 so we don't end up with values < Number.EPSILON
 
-	    function showMore(selection) {
-	      var more = selection.selectAll('.community-more')
-	        .data([0]);
+	    this.round(0);
+	  } // Note: this can rounds input values backwards or forwards.
+	  //       You might ask, why not restrict this to just rounding
+	  //       forwards? Wouldn't that allow left endpoints to always
+	  //       remain left endpoints during splitting (never change to
+	  //       right). No - it wouldn't, because we snap intersections
+	  //       to endpoints (to establish independence from the segment
+	  //       angle for t-intersections).
 
-	      var moreEnter = more.enter()
-	        .append('div')
-	        .attr('class', 'community-more');
 
-	      if (d.extendedDescription) {
-	        moreEnter
-	          .append('div')
-	          .attr('class', 'community-extended-description')
-	          .html(_t(("community." + (d.id) + ".extendedDescription"), replacements));
+	  _createClass$1(CoordRounder, [{
+	    key: "round",
+	    value: function round(coord) {
+	      var node = this.tree.add(coord);
+	      var prevNode = this.tree.prev(node);
+
+	      if (prevNode !== null && cmp(node.key, prevNode.key) === 0) {
+	        this.tree.remove(coord);
+	        return prevNode.key;
 	      }
 
-	      if (d.languageCodes && d.languageCodes.length) {
-	        var languageList = d.languageCodes
-	          .map(function (code) { return _mainLocalizer.languageName(code); })
-	          .join(', ');
+	      var nextNode = this.tree.next(node);
 
-	        moreEnter
-	          .append('div')
-	          .attr('class', 'community-languages')
-	          .text(_t('success.languages', { languages: languageList }));
+	      if (nextNode !== null && cmp(node.key, nextNode.key) === 0) {
+	        this.tree.remove(coord);
+	        return nextNode.key;
 	      }
-	    }
 
+	      return coord;
+	    }
+	  }]);
 
-	    function showNextEvents(selection) {
-	      var events = selection
-	        .append('div')
-	        .attr('class', 'community-events');
+	  return CoordRounder;
+	}(); // singleton available by import
 
-	      var item = events.selectAll('.community-event')
-	        .data(nextEvents);
 
-	      var itemEnter = item.enter()
-	        .append('div')
-	        .attr('class', 'community-event');
+	var rounder = new PtRounder();
+	/* Cross Product of two vectors with first point at origin */
 
-	      itemEnter
-	        .append('div')
-	        .attr('class', 'community-event-name')
-	        .append('a')
-	        .attr('target', '_blank')
-	        .attr('href', function (d) { return d.url; })
-	        .text(function (d) {
-	          var name = d.name;
-	          if (d.i18n && d.id) {
-	            name = _t(("community." + communityID + ".events." + (d.id) + ".name"), { default: name });
-	          }
-	          return name;
-	        });
+	var crossProduct$1 = function crossProduct(a, b) {
+	  return a.x * b.y - a.y * b.x;
+	};
+	/* Dot Product of two vectors with first point at origin */
 
-	      itemEnter
-	        .append('div')
-	        .attr('class', 'community-event-when')
-	        .text(function (d) {
-	          var options = { weekday: 'short', day: 'numeric', month: 'short', year: 'numeric' };
-	          if (d.date.getHours() || d.date.getMinutes()) {   // include time if it has one
-	            options.hour = 'numeric';
-	            options.minute = 'numeric';
-	          }
-	          return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
-	        });
 
-	      itemEnter
-	        .append('div')
-	        .attr('class', 'community-event-where')
-	        .text(function (d) {
-	          var where = d.where;
-	          if (d.i18n && d.id) {
-	            where = _t(("community." + communityID + ".events." + (d.id) + ".where"), { default: where });
-	          }
-	          return where;
-	        });
+	var dotProduct$1 = function dotProduct(a, b) {
+	  return a.x * b.x + a.y * b.y;
+	};
+	/* Comparator for two vectors with same starting point */
 
-	      itemEnter
-	        .append('div')
-	        .attr('class', 'community-event-description')
-	        .text(function (d) {
-	          var description = d.description;
-	          if (d.i18n && d.id) {
-	            description = _t(("community." + communityID + ".events." + (d.id) + ".description"), { default: description });
-	          }
-	          return description;
-	        });
-	    }
 
+	var compareVectorAngles = function compareVectorAngles(basePt, endPt1, endPt2) {
+	  var v1 = {
+	    x: endPt1.x - basePt.x,
+	    y: endPt1.y - basePt.y
+	  };
+	  var v2 = {
+	    x: endPt2.x - basePt.x,
+	    y: endPt2.y - basePt.y
+	  };
+	  var kross = crossProduct$1(v1, v2);
+	  return cmp(kross, 0);
+	};
 
-	    function linkify(url, text) {
-	      text = text || url;
-	      return ("<a target=\"_blank\" href=\"" + url + "\">" + text + "</a>");
-	    }
-	  }
+	var length = function length(v) {
+	  return Math.sqrt(dotProduct$1(v, v));
+	};
+	/* Get the sine of the angle from pShared -> pAngle to pShaed -> pBase */
 
 
-	  success.changeset = function(val) {
-	    if (!arguments.length) { return _changeset; }
-	    _changeset = val;
-	    return success;
+	var sineOfAngle = function sineOfAngle(pShared, pBase, pAngle) {
+	  var vBase = {
+	    x: pBase.x - pShared.x,
+	    y: pBase.y - pShared.y
+	  };
+	  var vAngle = {
+	    x: pAngle.x - pShared.x,
+	    y: pAngle.y - pShared.y
 	  };
+	  return crossProduct$1(vAngle, vBase) / length(vAngle) / length(vBase);
+	};
+	/* Get the cosine of the angle from pShared -> pAngle to pShaed -> pBase */
 
 
-	  success.location = function(val) {
-	    if (!arguments.length) { return _location; }
-	    _location = val;
-	    return success;
+	var cosineOfAngle = function cosineOfAngle(pShared, pBase, pAngle) {
+	  var vBase = {
+	    x: pBase.x - pShared.x,
+	    y: pBase.y - pShared.y
+	  };
+	  var vAngle = {
+	    x: pAngle.x - pShared.x,
+	    y: pAngle.y - pShared.y
 	  };
+	  return dotProduct$1(vAngle, vBase) / length(vAngle) / length(vBase);
+	};
+	/* Get the x coordinate where the given line (defined by a point and vector)
+	 * crosses the horizontal line with the given y coordiante.
+	 * In the case of parrallel lines (including overlapping ones) returns null. */
 
 
-	  return utilRebind(success, dispatch$1, 'on');
-	}
+	var horizontalIntersection = function horizontalIntersection(pt, v, y) {
+	  if (v.y === 0) return null;
+	  return {
+	    x: pt.x + v.x / v.y * (y - pt.y),
+	    y: y
+	  };
+	};
+	/* Get the y coordinate where the given line (defined by a point and vector)
+	 * crosses the vertical line with the given x coordiante.
+	 * In the case of parrallel lines (including overlapping ones) returns null. */
 
-	function modeSave(context) {
-	    var mode = { id: 'save' };
-	    var keybinding = utilKeybinding('modeSave');
 
-	    var commit = uiCommit(context)
-	        .on('cancel', cancel);
-	    var _conflictsUi; // uiConflicts
+	var verticalIntersection = function verticalIntersection(pt, v, x) {
+	  if (v.x === 0) return null;
+	  return {
+	    x: x,
+	    y: pt.y + v.y / v.x * (x - pt.x)
+	  };
+	};
+	/* Get the intersection of two lines, each defined by a base point and a vector.
+	 * In the case of parrallel lines (including overlapping ones) returns null. */
+
+
+	var intersection$1 = function intersection(pt1, v1, pt2, v2) {
+	  // take some shortcuts for vertical and horizontal lines
+	  // this also ensures we don't calculate an intersection and then discover
+	  // it's actually outside the bounding box of the line
+	  if (v1.x === 0) return verticalIntersection(pt2, v2, pt1.x);
+	  if (v2.x === 0) return verticalIntersection(pt1, v1, pt2.x);
+	  if (v1.y === 0) return horizontalIntersection(pt2, v2, pt1.y);
+	  if (v2.y === 0) return horizontalIntersection(pt1, v1, pt2.y); // General case for non-overlapping segments.
+	  // This algorithm is based on Schneider and Eberly.
+	  // http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf - pg 244
+
+	  var kross = crossProduct$1(v1, v2);
+	  if (kross == 0) return null;
+	  var ve = {
+	    x: pt2.x - pt1.x,
+	    y: pt2.y - pt1.y
+	  };
+	  var d1 = crossProduct$1(ve, v1) / kross;
+	  var d2 = crossProduct$1(ve, v2) / kross; // take the average of the two calculations to minimize rounding error
+
+	  var x1 = pt1.x + d2 * v1.x,
+	      x2 = pt2.x + d1 * v2.x;
+	  var y1 = pt1.y + d2 * v1.y,
+	      y2 = pt2.y + d1 * v2.y;
+	  var x = (x1 + x2) / 2;
+	  var y = (y1 + y2) / 2;
+	  return {
+	    x: x,
+	    y: y
+	  };
+	};
 
-	    var _location;
-	    var _success;
+	var SweepEvent$1 = /*#__PURE__*/function () {
+	  _createClass$1(SweepEvent, null, [{
+	    key: "compare",
+	    // for ordering sweep events in the sweep event queue
+	    value: function compare(a, b) {
+	      // favor event with a point that the sweep line hits first
+	      var ptCmp = SweepEvent.comparePoints(a.point, b.point);
+	      if (ptCmp !== 0) return ptCmp; // the points are the same, so link them if needed
 
-	    var uploader = context.uploader()
-	        .on('saveStarted.modeSave', function() {
-	            keybindingOff();
-	        })
-	        // fire off some async work that we want to be ready later
-	        .on('willAttemptUpload.modeSave', prepareForSuccess)
-	        .on('progressChanged.modeSave', showProgress)
-	        .on('resultNoChanges.modeSave', function() {
-	            cancel();
-	        })
-	        .on('resultErrors.modeSave', showErrors)
-	        .on('resultConflicts.modeSave', showConflicts)
-	        .on('resultSuccess.modeSave', showSuccess);
+	      if (a.point !== b.point) a.link(b); // favor right events over left
 
+	      if (a.isLeft !== b.isLeft) return a.isLeft ? 1 : -1; // we have two matching left or right endpoints
+	      // ordering of this case is the same as for their segments
 
-	    function cancel() {
-	        context.enter(modeBrowse(context));
-	    }
+	      return Segment.compare(a.segment, b.segment);
+	    } // for ordering points in sweep line order
+
+	  }, {
+	    key: "comparePoints",
+	    value: function comparePoints(aPt, bPt) {
+	      if (aPt.x < bPt.x) return -1;
+	      if (aPt.x > bPt.x) return 1;
+	      if (aPt.y < bPt.y) return -1;
+	      if (aPt.y > bPt.y) return 1;
+	      return 0;
+	    } // Warning: 'point' input will be modified and re-used (for performance)
+
+	  }]);
+
+	  function SweepEvent(point, isLeft) {
+	    _classCallCheck$1(this, SweepEvent);
+
+	    if (point.events === undefined) point.events = [this];else point.events.push(this);
+	    this.point = point;
+	    this.isLeft = isLeft; // this.segment, this.otherSE set by factory
+	  }
+
+	  _createClass$1(SweepEvent, [{
+	    key: "link",
+	    value: function link(other) {
+	      if (other.point === this.point) {
+	        throw new Error('Tried to link already linked events');
+	      }
 
+	      var otherEvents = other.point.events;
 
-	    function showProgress(num, total) {
-	        var modal = context.container().select('.loading-modal .modal-section');
-	        var progress = modal.selectAll('.progress')
-	            .data([0]);
+	      for (var i = 0, iMax = otherEvents.length; i < iMax; i++) {
+	        var evt = otherEvents[i];
+	        this.point.events.push(evt);
+	        evt.point = this.point;
+	      }
 
-	        // enter/update
-	        progress.enter()
-	            .append('div')
-	            .attr('class', 'progress')
-	            .merge(progress)
-	            .text(_t('save.conflict_progress', { num: num, total: total }));
+	      this.checkForConsuming();
 	    }
+	    /* Do a pass over our linked events and check to see if any pair
+	     * of segments match, and should be consumed. */
 
+	  }, {
+	    key: "checkForConsuming",
+	    value: function checkForConsuming() {
+	      // FIXME: The loops in this method run O(n^2) => no good.
+	      //        Maintain little ordered sweep event trees?
+	      //        Can we maintaining an ordering that avoids the need
+	      //        for the re-sorting with getLeftmostComparator in geom-out?
+	      // Compare each pair of events to see if other events also match
+	      var numEvents = this.point.events.length;
+
+	      for (var i = 0; i < numEvents; i++) {
+	        var evt1 = this.point.events[i];
+	        if (evt1.segment.consumedBy !== undefined) continue;
+
+	        for (var j = i + 1; j < numEvents; j++) {
+	          var evt2 = this.point.events[j];
+	          if (evt2.consumedBy !== undefined) continue;
+	          if (evt1.otherSE.point.events !== evt2.otherSE.point.events) continue;
+	          evt1.segment.consume(evt2.segment);
+	        }
+	      }
+	    }
+	  }, {
+	    key: "getAvailableLinkedEvents",
+	    value: function getAvailableLinkedEvents() {
+	      // point.events is always of length 2 or greater
+	      var events = [];
 
-	    function showConflicts(changeset, conflicts, origChanges) {
+	      for (var i = 0, iMax = this.point.events.length; i < iMax; i++) {
+	        var evt = this.point.events[i];
 
-	        var selection = context.container()
-	            .select('.sidebar')
-	            .append('div')
-	            .attr('class','sidebar-component');
-
-	        context.container().selectAll('.main-content')
-	            .classed('active', true)
-	            .classed('inactive', false);
-
-	        _conflictsUi = uiConflicts(context)
-	            .conflictList(conflicts)
-	            .origChanges(origChanges)
-	            .on('cancel', function() {
-	                context.container().selectAll('.main-content')
-	                    .classed('active', false)
-	                    .classed('inactive', true);
-	                selection.remove();
-	                keybindingOn();
-
-	                uploader.cancelConflictResolution();
-	            })
-	            .on('save', function() {
-	                context.container().selectAll('.main-content')
-	                    .classed('active', false)
-	                    .classed('inactive', true);
-	                selection.remove();
-
-	                uploader.processResolvedConflicts(changeset);
-	            });
+	        if (evt !== this && !evt.segment.ringOut && evt.segment.isInResult()) {
+	          events.push(evt);
+	        }
+	      }
 
-	        selection.call(_conflictsUi);
+	      return events;
 	    }
+	    /**
+	     * Returns a comparator function for sorting linked events that will
+	     * favor the event that will give us the smallest left-side angle.
+	     * All ring construction starts as low as possible heading to the right,
+	     * so by always turning left as sharp as possible we'll get polygons
+	     * without uncessary loops & holes.
+	     *
+	     * The comparator function has a compute cache such that it avoids
+	     * re-computing already-computed values.
+	     */
 
+	  }, {
+	    key: "getLeftmostComparator",
+	    value: function getLeftmostComparator(baseEvent) {
+	      var _this = this;
 
-	    function showErrors(errors) {
-	        keybindingOn();
-
-	        var selection = uiConfirm(context.container());
-	        selection
-	            .select('.modal-section.header')
-	            .append('h3')
-	            .text(_t('save.error'));
-
-	        addErrors(selection, errors);
-	        selection.okButton();
-	    }
+	      var cache = new Map();
 
+	      var fillCache = function fillCache(linkedEvent) {
+	        var nextEvent = linkedEvent.otherSE;
+	        cache.set(linkedEvent, {
+	          sine: sineOfAngle(_this.point, baseEvent.point, nextEvent.point),
+	          cosine: cosineOfAngle(_this.point, baseEvent.point, nextEvent.point)
+	        });
+	      };
 
-	    function addErrors(selection, data) {
-	        var message = selection
-	            .select('.modal-section.message-text');
+	      return function (a, b) {
+	        if (!cache.has(a)) fillCache(a);
+	        if (!cache.has(b)) fillCache(b);
 
-	        var items = message
-	            .selectAll('.error-container')
-	            .data(data);
+	        var _cache$get = cache.get(a),
+	            asine = _cache$get.sine,
+	            acosine = _cache$get.cosine;
 
-	        var enter = items.enter()
-	            .append('div')
-	            .attr('class', 'error-container');
-
-	        enter
-	            .append('a')
-	            .attr('class', 'error-description')
-	            .attr('href', '#')
-	            .classed('hide-toggle', true)
-	            .text(function(d) { return d.msg || _t('save.unknown_error_details'); })
-	            .on('click', function() {
-	                event.preventDefault();
-
-	                var error = select(this);
-	                var detail = select(this.nextElementSibling);
-	                var exp = error.classed('expanded');
-
-	                detail.style('display', exp ? 'none' : 'block');
-	                error.classed('expanded', !exp);
-	            });
+	        var _cache$get2 = cache.get(b),
+	            bsine = _cache$get2.sine,
+	            bcosine = _cache$get2.cosine; // both on or above x-axis
 
-	        var details = enter
-	            .append('div')
-	            .attr('class', 'error-detail-container')
-	            .style('display', 'none');
-
-	        details
-	            .append('ul')
-	            .attr('class', 'error-detail-list')
-	            .selectAll('li')
-	            .data(function(d) { return d.details || []; })
-	            .enter()
-	            .append('li')
-	            .attr('class', 'error-detail-item')
-	            .text(function(d) { return d; });
 
-	        items.exit()
-	            .remove();
-	    }
+	        if (asine >= 0 && bsine >= 0) {
+	          if (acosine < bcosine) return 1;
+	          if (acosine > bcosine) return -1;
+	          return 0;
+	        } // both below x-axis
 
 
-	    function showSuccess(changeset) {
-	        commit.reset();
+	        if (asine < 0 && bsine < 0) {
+	          if (acosine < bcosine) return -1;
+	          if (acosine > bcosine) return 1;
+	          return 0;
+	        } // one above x-axis, one below
 
-	        var ui = _success
-	            .changeset(changeset)
-	            .location(_location)
-	            .on('cancel', function() { context.ui().sidebar.hide(); });
 
-	        context.enter(modeBrowse(context).sidebar(ui));
+	        if (bsine < asine) return -1;
+	        if (bsine > asine) return 1;
+	        return 0;
+	      };
 	    }
+	  }]);
 
+	  return SweepEvent;
+	}(); // segments and sweep events when all else is identical
 
-	    function keybindingOn() {
-	        select(document)
-	            .call(keybinding.on('⎋', cancel, true));
-	    }
 
+	var segmentId = 0;
 
-	    function keybindingOff() {
-	        select(document)
-	            .call(keybinding.unbind);
-	    }
+	var Segment = /*#__PURE__*/function () {
+	  _createClass$1(Segment, null, [{
+	    key: "compare",
 
+	    /* This compare() function is for ordering segments in the sweep
+	     * line tree, and does so according to the following criteria:
+	     *
+	     * Consider the vertical line that lies an infinestimal step to the
+	     * right of the right-more of the two left endpoints of the input
+	     * segments. Imagine slowly moving a point up from negative infinity
+	     * in the increasing y direction. Which of the two segments will that
+	     * point intersect first? That segment comes 'before' the other one.
+	     *
+	     * If neither segment would be intersected by such a line, (if one
+	     * or more of the segments are vertical) then the line to be considered
+	     * is directly on the right-more of the two left inputs.
+	     */
+	    value: function compare(a, b) {
+	      var alx = a.leftSE.point.x;
+	      var blx = b.leftSE.point.x;
+	      var arx = a.rightSE.point.x;
+	      var brx = b.rightSE.point.x; // check if they're even in the same vertical plane
+
+	      if (brx < alx) return 1;
+	      if (arx < blx) return -1;
+	      var aly = a.leftSE.point.y;
+	      var bly = b.leftSE.point.y;
+	      var ary = a.rightSE.point.y;
+	      var bry = b.rightSE.point.y; // is left endpoint of segment B the right-more?
+
+	      if (alx < blx) {
+	        // are the two segments in the same horizontal plane?
+	        if (bly < aly && bly < ary) return 1;
+	        if (bly > aly && bly > ary) return -1; // is the B left endpoint colinear to segment A?
+
+	        var aCmpBLeft = a.comparePoint(b.leftSE.point);
+	        if (aCmpBLeft < 0) return 1;
+	        if (aCmpBLeft > 0) return -1; // is the A right endpoint colinear to segment B ?
+
+	        var bCmpARight = b.comparePoint(a.rightSE.point);
+	        if (bCmpARight !== 0) return bCmpARight; // colinear segments, consider the one with left-more
+	        // left endpoint to be first (arbitrary?)
 
-	    // Reverse geocode current map location so we can display a message on
-	    // the success screen like "Thank you for editing around place, region."
-	    function prepareForSuccess() {
-	        _success = uiSuccess(context);
-	        _location = null;
-	        if (!services.geocoder) { return; }
+	        return -1;
+	      } // is left endpoint of segment A the right-more?
 
-	        services.geocoder.reverse(context.map().center(), function(err, result) {
-	            if (err || !result || !result.address) { return; }
 
-	            var addr = result.address;
-	            var place = (addr && (addr.town || addr.city || addr.county)) || '';
-	            var region = (addr && (addr.state || addr.country)) || '';
-	            var separator = (place && region) ? _t('success.thank_you_where.separator') : '';
+	      if (alx > blx) {
+	        if (aly < bly && aly < bry) return -1;
+	        if (aly > bly && aly > bry) return 1; // is the A left endpoint colinear to segment B?
 
-	            _location = _t('success.thank_you_where.format',
-	                { place: place, separator: separator, region: region }
-	            );
-	        });
-	    }
+	        var bCmpALeft = b.comparePoint(a.leftSE.point);
+	        if (bCmpALeft !== 0) return bCmpALeft; // is the B right endpoint colinear to segment A?
 
+	        var aCmpBRight = a.comparePoint(b.rightSE.point);
+	        if (aCmpBRight < 0) return 1;
+	        if (aCmpBRight > 0) return -1; // colinear segments, consider the one with left-more
+	        // left endpoint to be first (arbitrary?)
 
-	    mode.selectedIDs = function() {
-	        return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
-	    };
+	        return 1;
+	      } // if we get here, the two left endpoints are in the same
+	      // vertical plane, ie alx === blx
+	      // consider the lower left-endpoint to come first
 
 
-	    mode.enter = function() {
-	        // Show sidebar
-	        context.ui().sidebar.expand();
+	      if (aly < bly) return -1;
+	      if (aly > bly) return 1; // left endpoints are identical
+	      // check for colinearity by using the left-more right endpoint
+	      // is the A right endpoint more left-more?
 
-	        function done() {
-	            context.ui().sidebar.show(commit);
-	        }
+	      if (arx < brx) {
+	        var _bCmpARight = b.comparePoint(a.rightSE.point);
 
-	        keybindingOn();
+	        if (_bCmpARight !== 0) return _bCmpARight;
+	      } // is the B right endpoint more left-more?
 
-	        context.container().selectAll('.main-content')
-	            .classed('active', false)
-	            .classed('inactive', true);
 
-	        var osm = context.connection();
-	        if (!osm) {
-	            cancel();
-	            return;
-	        }
+	      if (arx > brx) {
+	        var _aCmpBRight = a.comparePoint(b.rightSE.point);
 
-	        if (osm.authenticated()) {
-	            done();
-	        } else {
-	            osm.authenticate(function(err) {
-	                if (err) {
-	                    cancel();
-	                } else {
-	                    done();
-	                }
-	            });
-	        }
-	    };
+	        if (_aCmpBRight < 0) return 1;
+	        if (_aCmpBRight > 0) return -1;
+	      }
 
+	      if (arx !== brx) {
+	        // are these two [almost] vertical segments with opposite orientation?
+	        // if so, the one with the lower right endpoint comes first
+	        var ay = ary - aly;
+	        var ax = arx - alx;
+	        var by = bry - bly;
+	        var bx = brx - blx;
+	        if (ay > ax && by < bx) return 1;
+	        if (ay < ax && by > bx) return -1;
+	      } // we have colinear segments with matching orientation
+	      // consider the one with more left-more right endpoint to be first
 
-	    mode.exit = function() {
 
-	        keybindingOff();
+	      if (arx > brx) return 1;
+	      if (arx < brx) return -1; // if we get here, two two right endpoints are in the same
+	      // vertical plane, ie arx === brx
+	      // consider the lower right-endpoint to come first
 
-	        context.container().selectAll('.main-content')
-	            .classed('active', true)
-	            .classed('inactive', false);
+	      if (ary < bry) return -1;
+	      if (ary > bry) return 1; // right endpoints identical as well, so the segments are idential
+	      // fall back on creation order as consistent tie-breaker
 
-	        context.ui().sidebar.hide();
-	    };
+	      if (a.id < b.id) return -1;
+	      if (a.id > b.id) return 1; // identical segment, ie a === b
 
-	    return mode;
-	}
+	      return 0;
+	    }
+	    /* Warning: a reference to ringWindings input will be stored,
+	     *  and possibly will be later modified */
 
-	function uiToolOldDrawModes(context) {
+	  }]);
 
-	    var tool = {
-	        id: 'old_modes',
-	        label: _t('toolbar.add_feature')
-	    };
+	  function Segment(leftSE, rightSE, rings, windings) {
+	    _classCallCheck$1(this, Segment);
 
-	    var modes = [
-	        modeAddPoint(context, {
-	            title: _t('modes.add_point.title'),
-	            button: 'point',
-	            description: _t('modes.add_point.description'),
-	            preset: _mainPresetIndex.item('point'),
-	            key: '1'
-	        }),
-	        modeAddLine(context, {
-	            title: _t('modes.add_line.title'),
-	            button: 'line',
-	            description: _t('modes.add_line.description'),
-	            preset: _mainPresetIndex.item('line'),
-	            key: '2'
-	        }),
-	        modeAddArea(context, {
-	            title: _t('modes.add_area.title'),
-	            button: 'area',
-	            description: _t('modes.add_area.description'),
-	            preset: _mainPresetIndex.item('area'),
-	            key: '3'
-	        })
-	    ];
+	    this.id = ++segmentId;
+	    this.leftSE = leftSE;
+	    leftSE.segment = this;
+	    leftSE.otherSE = rightSE;
+	    this.rightSE = rightSE;
+	    rightSE.segment = this;
+	    rightSE.otherSE = leftSE;
+	    this.rings = rings;
+	    this.windings = windings; // left unset for performance, set later in algorithm
+	    // this.ringOut, this.consumedBy, this.prev
+	  }
 
+	  _createClass$1(Segment, [{
+	    key: "replaceRightSE",
 
-	    function enabled() {
-	        return osmEditable();
+	    /* When a segment is split, the rightSE is replaced with a new sweep event */
+	    value: function replaceRightSE(newRightSE) {
+	      this.rightSE = newRightSE;
+	      this.rightSE.segment = this;
+	      this.rightSE.otherSE = this.leftSE;
+	      this.leftSE.otherSE = this.rightSE;
 	    }
-
-	    function osmEditable() {
-	        return context.editable();
+	  }, {
+	    key: "bbox",
+	    value: function bbox() {
+	      var y1 = this.leftSE.point.y;
+	      var y2 = this.rightSE.point.y;
+	      return {
+	        ll: {
+	          x: this.leftSE.point.x,
+	          y: y1 < y2 ? y1 : y2
+	        },
+	        ur: {
+	          x: this.rightSE.point.x,
+	          y: y1 > y2 ? y1 : y2
+	        }
+	      };
 	    }
+	    /* A vector from the left point to the right */
 
-	    modes.forEach(function(mode) {
-	        context.keybinding().on(mode.key, function() {
-	            if (!enabled()) { return; }
-
-	            if (mode.id === context.mode().id) {
-	                context.enter(modeBrowse(context));
-	            } else {
-	                context.enter(mode);
-	            }
-	        });
-	    });
+	  }, {
+	    key: "vector",
+	    value: function vector() {
+	      return {
+	        x: this.rightSE.point.x - this.leftSE.point.x,
+	        y: this.rightSE.point.y - this.leftSE.point.y
+	      };
+	    }
+	  }, {
+	    key: "isAnEndpoint",
+	    value: function isAnEndpoint(pt) {
+	      return pt.x === this.leftSE.point.x && pt.y === this.leftSE.point.y || pt.x === this.rightSE.point.x && pt.y === this.rightSE.point.y;
+	    }
+	    /* Compare this segment with a point.
+	     *
+	     * A point P is considered to be colinear to a segment if there
+	     * exists a distance D such that if we travel along the segment
+	     * from one * endpoint towards the other a distance D, we find
+	     * ourselves at point P.
+	     *
+	     * Return value indicates:
+	     *
+	     *   1: point lies above the segment (to the left of vertical)
+	     *   0: point is colinear to segment
+	     *  -1: point lies below the segment (to the right of vertical)
+	     */
 
-	    tool.render = function(selection) {
+	  }, {
+	    key: "comparePoint",
+	    value: function comparePoint(point) {
+	      if (this.isAnEndpoint(point)) return 0;
+	      var lPt = this.leftSE.point;
+	      var rPt = this.rightSE.point;
+	      var v = this.vector(); // Exactly vertical segments.
+
+	      if (lPt.x === rPt.x) {
+	        if (point.x === lPt.x) return 0;
+	        return point.x < lPt.x ? 1 : -1;
+	      } // Nearly vertical segments with an intersection.
+	      // Check to see where a point on the line with matching Y coordinate is.
+
+
+	      var yDist = (point.y - lPt.y) / v.y;
+	      var xFromYDist = lPt.x + yDist * v.x;
+	      if (point.x === xFromYDist) return 0; // General case.
+	      // Check to see where a point on the line with matching X coordinate is.
+
+	      var xDist = (point.x - lPt.x) / v.x;
+	      var yFromXDist = lPt.y + xDist * v.y;
+	      if (point.y === yFromXDist) return 0;
+	      return point.y < yFromXDist ? -1 : 1;
+	    }
+	    /**
+	     * Given another segment, returns the first non-trivial intersection
+	     * between the two segments (in terms of sweep line ordering), if it exists.
+	     *
+	     * A 'non-trivial' intersection is one that will cause one or both of the
+	     * segments to be split(). As such, 'trivial' vs. 'non-trivial' intersection:
+	     *
+	     *   * endpoint of segA with endpoint of segB --> trivial
+	     *   * endpoint of segA with point along segB --> non-trivial
+	     *   * endpoint of segB with point along segA --> non-trivial
+	     *   * point along segA with point along segB --> non-trivial
+	     *
+	     * If no non-trivial intersection exists, return null
+	     * Else, return null.
+	     */
 
-	        var wrap = selection
-	            .append('div')
-	            .attr('class', 'joined')
-	            .style('display', 'flex');
+	  }, {
+	    key: "getIntersection",
+	    value: function getIntersection(other) {
+	      // If bboxes don't overlap, there can't be any intersections
+	      var tBbox = this.bbox();
+	      var oBbox = other.bbox();
+	      var bboxOverlap = getBboxOverlap(tBbox, oBbox);
+	      if (bboxOverlap === null) return null; // We first check to see if the endpoints can be considered intersections.
+	      // This will 'snap' intersections to endpoints if possible, and will
+	      // handle cases of colinearity.
+
+	      var tlp = this.leftSE.point;
+	      var trp = this.rightSE.point;
+	      var olp = other.leftSE.point;
+	      var orp = other.rightSE.point; // does each endpoint touch the other segment?
+	      // note that we restrict the 'touching' definition to only allow segments
+	      // to touch endpoints that lie forward from where we are in the sweep line pass
+
+	      var touchesOtherLSE = isInBbox(tBbox, olp) && this.comparePoint(olp) === 0;
+	      var touchesThisLSE = isInBbox(oBbox, tlp) && other.comparePoint(tlp) === 0;
+	      var touchesOtherRSE = isInBbox(tBbox, orp) && this.comparePoint(orp) === 0;
+	      var touchesThisRSE = isInBbox(oBbox, trp) && other.comparePoint(trp) === 0; // do left endpoints match?
+
+	      if (touchesThisLSE && touchesOtherLSE) {
+	        // these two cases are for colinear segments with matching left
+	        // endpoints, and one segment being longer than the other
+	        if (touchesThisRSE && !touchesOtherRSE) return trp;
+	        if (!touchesThisRSE && touchesOtherRSE) return orp; // either the two segments match exactly (two trival intersections)
+	        // or just on their left endpoint (one trivial intersection
 
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
+	        return null;
+	      } // does this left endpoint matches (other doesn't)
 
-	        context.map()
-	            .on('move.modes', debouncedUpdate)
-	            .on('drawn.modes', debouncedUpdate);
 
-	        context
-	            .on('enter.modes', update);
+	      if (touchesThisLSE) {
+	        // check for segments that just intersect on opposing endpoints
+	        if (touchesOtherRSE) {
+	          if (tlp.x === orp.x && tlp.y === orp.y) return null;
+	        } // t-intersection on left endpoint
 
-	        update();
 
+	        return tlp;
+	      } // does other left endpoint matches (this doesn't)
 
-	        function update() {
 
-	            var buttons = wrap.selectAll('button.add-button')
-	                .data(modes, function(d) { return d.id; });
+	      if (touchesOtherLSE) {
+	        // check for segments that just intersect on opposing endpoints
+	        if (touchesThisRSE) {
+	          if (trp.x === olp.x && trp.y === olp.y) return null;
+	        } // t-intersection on left endpoint
 
-	            // exit
-	            buttons.exit()
-	                .remove();
 
-	            // enter
-	            var buttonsEnter = buttons.enter()
-	                .append('button')
-	                .attr('class', function(d) { return d.id + ' add-button bar-button'; })
-	                .on('click.mode-buttons', function(d) {
-	                    if (!enabled()) { return; }
+	        return olp;
+	      } // trivial intersection on right endpoints
 
-	                    // When drawing, ignore accidental clicks on mode buttons - #4042
-	                    var currMode = context.mode().id;
-	                    if (/^draw/.test(currMode)) { return; }
 
-	                    if (d.id === currMode) {
-	                        context.enter(modeBrowse(context));
-	                    } else {
-	                        context.enter(d);
-	                    }
-	                })
-	                .call(uiTooltip()
-	                    .placement('bottom')
-	                    .title(function(d) { return d.description; })
-	                    .keys(function(d) { return [d.key]; })
-	                    .scrollContainer(context.container().select('.top-toolbar'))
-	                );
+	      if (touchesThisRSE && touchesOtherRSE) return null; // t-intersections on just one right endpoint
 
-	            buttonsEnter
-	                .each(function(d) {
-	                    select(this)
-	                        .call(svgIcon('#iD-icon-' + d.button));
-	                });
+	      if (touchesThisRSE) return trp;
+	      if (touchesOtherRSE) return orp; // None of our endpoints intersect. Look for a general intersection between
+	      // infinite lines laid over the segments
 
-	            buttonsEnter
-	                .append('span')
-	                .attr('class', 'label')
-	                .text(function(mode) { return mode.title; });
+	      var pt = intersection$1(tlp, this.vector(), olp, other.vector()); // are the segments parrallel? Note that if they were colinear with overlap,
+	      // they would have an endpoint intersection and that case was already handled above
 
-	            // if we are adding/removing the buttons, check if toolbar has overflowed
-	            if (buttons.enter().size() || buttons.exit().size()) {
-	                context.ui().checkOverflow('.top-toolbar', true);
-	            }
+	      if (pt === null) return null; // is the intersection found between the lines not on the segments?
 
-	            // update
-	            buttons = buttons
-	                .merge(buttonsEnter)
-	                .classed('disabled', function(d) { return !enabled(); })
-	                .classed('active', function(d) { return context.mode() && context.mode().button === d.button; });
-	        }
-	    };
+	      if (!isInBbox(bboxOverlap, pt)) return null; // round the the computed point if needed
 
-	    return tool;
-	}
+	      return rounder.round(pt.x, pt.y);
+	    }
+	    /**
+	     * Split the given segment into multiple segments on the given points.
+	     *  * Each existing segment will retain its leftSE and a new rightSE will be
+	     *    generated for it.
+	     *  * A new segment will be generated which will adopt the original segment's
+	     *    rightSE, and a new leftSE will be generated for it.
+	     *  * If there are more than two points given to split on, new segments
+	     *    in the middle will be generated with new leftSE and rightSE's.
+	     *  * An array of the newly generated SweepEvents will be returned.
+	     *
+	     * Warning: input array of points is modified
+	     */
 
-	function uiToolNotes(context) {
+	  }, {
+	    key: "split",
+	    value: function split(point) {
+	      var newEvents = [];
+	      var alreadyLinked = point.events !== undefined;
+	      var newLeftSE = new SweepEvent$1(point, true);
+	      var newRightSE = new SweepEvent$1(point, false);
+	      var oldRightSE = this.rightSE;
+	      this.replaceRightSE(newRightSE);
+	      newEvents.push(newRightSE);
+	      newEvents.push(newLeftSE);
+	      var newSeg = new Segment(newLeftSE, oldRightSE, this.rings.slice(), this.windings.slice()); // when splitting a nearly vertical downward-facing segment,
+	      // sometimes one of the resulting new segments is vertical, in which
+	      // case its left and right events may need to be swapped
+
+	      if (SweepEvent$1.comparePoints(newSeg.leftSE.point, newSeg.rightSE.point) > 0) {
+	        newSeg.swapEvents();
+	      }
 
-	    var tool = {
-	        id: 'notes',
-	        label: _t('modes.add_note.label')
-	    };
+	      if (SweepEvent$1.comparePoints(this.leftSE.point, this.rightSE.point) > 0) {
+	        this.swapEvents();
+	      } // in the point we just used to create new sweep events with was already
+	      // linked to other events, we need to check if either of the affected
+	      // segments should be consumed
 
-	    var mode = modeAddNote(context);
 
-	    function enabled() {
-	        return notesEnabled() && notesEditable();
-	    }
+	      if (alreadyLinked) {
+	        newLeftSE.checkForConsuming();
+	        newRightSE.checkForConsuming();
+	      }
 
-	    function notesEnabled() {
-	        var noteLayer = context.layers().layer('notes');
-	        return noteLayer && noteLayer.enabled();
+	      return newEvents;
 	    }
+	    /* Swap which event is left and right */
 
-	    function notesEditable() {
-	        var mode = context.mode();
-	        return context.map().notesEditable() && mode && mode.id !== 'save';
+	  }, {
+	    key: "swapEvents",
+	    value: function swapEvents() {
+	      var tmpEvt = this.rightSE;
+	      this.rightSE = this.leftSE;
+	      this.leftSE = tmpEvt;
+	      this.leftSE.isLeft = true;
+	      this.rightSE.isLeft = false;
+
+	      for (var i = 0, iMax = this.windings.length; i < iMax; i++) {
+	        this.windings[i] *= -1;
+	      }
 	    }
+	    /* Consume another segment. We take their rings under our wing
+	     * and mark them as consumed. Use for perfectly overlapping segments */
 
-	    context.keybinding().on(mode.key, function() {
-	        if (!enabled()) { return; }
-
-	        if (mode.id === context.mode().id) {
-	            context.enter(modeBrowse(context));
-	        } else {
-	            context.enter(mode);
-	        }
-	    });
-
-	    tool.render = function(selection) {
+	  }, {
+	    key: "consume",
+	    value: function consume(other) {
+	      var consumer = this;
+	      var consumee = other;
 
+	      while (consumer.consumedBy) {
+	        consumer = consumer.consumedBy;
+	      }
 
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
+	      while (consumee.consumedBy) {
+	        consumee = consumee.consumedBy;
+	      }
 
-	        context.map()
-	            .on('move.notes', debouncedUpdate)
-	            .on('drawn.notes', debouncedUpdate);
+	      var cmp = Segment.compare(consumer, consumee);
+	      if (cmp === 0) return; // already consumed
+	      // the winner of the consumption is the earlier segment
+	      // according to sweep line ordering
 
-	        context
-	            .on('enter.notes', update);
+	      if (cmp > 0) {
+	        var tmp = consumer;
+	        consumer = consumee;
+	        consumee = tmp;
+	      } // make sure a segment doesn't consume it's prev
 
-	        update();
 
+	      if (consumer.prev === consumee) {
+	        var _tmp = consumer;
+	        consumer = consumee;
+	        consumee = _tmp;
+	      }
 
-	        function update() {
-	            var showNotes = notesEnabled();
-	            var data = showNotes ? [mode] : [];
+	      for (var i = 0, iMax = consumee.rings.length; i < iMax; i++) {
+	        var ring = consumee.rings[i];
+	        var winding = consumee.windings[i];
+	        var index = consumer.rings.indexOf(ring);
 
-	            var buttons = selection.selectAll('button.add-button')
-	                .data(data, function(d) { return d.id; });
+	        if (index === -1) {
+	          consumer.rings.push(ring);
+	          consumer.windings.push(winding);
+	        } else consumer.windings[index] += winding;
+	      }
 
-	            // exit
-	            buttons.exit()
-	                .remove();
+	      consumee.rings = null;
+	      consumee.windings = null;
+	      consumee.consumedBy = consumer; // mark sweep events consumed as to maintain ordering in sweep event queue
 
-	            // enter
-	            var buttonsEnter = buttons.enter()
-	                .append('button')
-	                .attr('tabindex', -1)
-	                .attr('class', function(d) { return d.id + ' add-button bar-button'; })
-	                .on('click.notes', function(d) {
-	                    if (!enabled()) { return; }
+	      consumee.leftSE.consumedBy = consumer.leftSE;
+	      consumee.rightSE.consumedBy = consumer.rightSE;
+	    }
+	    /* The first segment previous segment chain that is in the result */
 
-	                    // When drawing, ignore accidental clicks on mode buttons - #4042
-	                    var currMode = context.mode().id;
-	                    if (/^draw/.test(currMode)) { return; }
+	  }, {
+	    key: "prevInResult",
+	    value: function prevInResult() {
+	      if (this._prevInResult !== undefined) return this._prevInResult;
+	      if (!this.prev) this._prevInResult = null;else if (this.prev.isInResult()) this._prevInResult = this.prev;else this._prevInResult = this.prev.prevInResult();
+	      return this._prevInResult;
+	    }
+	  }, {
+	    key: "beforeState",
+	    value: function beforeState() {
+	      if (this._beforeState !== undefined) return this._beforeState;
+	      if (!this.prev) this._beforeState = {
+	        rings: [],
+	        windings: [],
+	        multiPolys: []
+	      };else {
+	        var seg = this.prev.consumedBy || this.prev;
+	        this._beforeState = seg.afterState();
+	      }
+	      return this._beforeState;
+	    }
+	  }, {
+	    key: "afterState",
+	    value: function afterState() {
+	      if (this._afterState !== undefined) return this._afterState;
+	      var beforeState = this.beforeState();
+	      this._afterState = {
+	        rings: beforeState.rings.slice(0),
+	        windings: beforeState.windings.slice(0),
+	        multiPolys: []
+	      };
+	      var ringsAfter = this._afterState.rings;
+	      var windingsAfter = this._afterState.windings;
+	      var mpsAfter = this._afterState.multiPolys; // calculate ringsAfter, windingsAfter
 
-	                    if (d.id === currMode) {
-	                        context.enter(modeBrowse(context));
-	                    } else {
-	                        context.enter(d);
-	                    }
-	                })
-	                .call(uiTooltip()
-	                    .placement('bottom')
-	                    .title(function(d) { return d.description; })
-	                    .keys(function(d) { return [d.key]; })
-	                    .scrollContainer(context.container().select('.top-toolbar'))
-	                );
+	      for (var i = 0, iMax = this.rings.length; i < iMax; i++) {
+	        var ring = this.rings[i];
+	        var winding = this.windings[i];
+	        var index = ringsAfter.indexOf(ring);
 
-	            buttonsEnter
-	                .each(function(d) {
-	                    select(this)
-	                        .call(svgIcon(d.icon || '#iD-icon-' + d.button));
-	                });
+	        if (index === -1) {
+	          ringsAfter.push(ring);
+	          windingsAfter.push(winding);
+	        } else windingsAfter[index] += winding;
+	      } // calcualte polysAfter
 
-	            // if we are adding/removing the buttons, check if toolbar has overflowed
-	            if (buttons.enter().size() || buttons.exit().size()) {
-	                context.ui().checkOverflow('.top-toolbar', true);
-	            }
 
-	            // update
-	            buttons = buttons
-	                .merge(buttonsEnter)
-	                .classed('disabled', function(d) { return !enabled(); })
-	                .classed('active', function(d) { return context.mode() && context.mode().button === d.button; });
-	        }
-	    };
+	      var polysAfter = [];
+	      var polysExclude = [];
 
-	    tool.uninstall = function() {
-	        context
-	            .on('enter.editor.notes', null)
-	            .on('exit.editor.notes', null)
-	            .on('enter.notes', null);
+	      for (var _i = 0, _iMax = ringsAfter.length; _i < _iMax; _i++) {
+	        if (windingsAfter[_i] === 0) continue; // non-zero rule
 
-	        context.map()
-	            .on('move.notes', null)
-	            .on('drawn.notes', null);
-	    };
+	        var _ring = ringsAfter[_i];
+	        var poly = _ring.poly;
+	        if (polysExclude.indexOf(poly) !== -1) continue;
+	        if (_ring.isExterior) polysAfter.push(poly);else {
+	          if (polysExclude.indexOf(poly) === -1) polysExclude.push(poly);
 
-	    return tool;
-	}
+	          var _index = polysAfter.indexOf(_ring.poly);
 
-	function uiToolSave(context) {
+	          if (_index !== -1) polysAfter.splice(_index, 1);
+	        }
+	      } // calculate multiPolysAfter
 
-	    var tool = {
-	        id: 'save',
-	        label: _t('save.title')
-	    };
 
-	    var button = null;
-	    var tooltipBehavior = null;
-	    var history = context.history();
-	    var key = uiCmd('⌘S');
-	    var _numChanges = 0;
+	      for (var _i2 = 0, _iMax2 = polysAfter.length; _i2 < _iMax2; _i2++) {
+	        var mp = polysAfter[_i2].multiPoly;
+	        if (mpsAfter.indexOf(mp) === -1) mpsAfter.push(mp);
+	      }
 
-	    function isSaving() {
-	        var mode = context.mode();
-	        return mode && mode.id === 'save';
+	      return this._afterState;
 	    }
+	    /* Is this segment part of the final result? */
 
-	    function isDisabled() {
-	        return _numChanges === 0 || isSaving();
-	    }
+	  }, {
+	    key: "isInResult",
+	    value: function isInResult() {
+	      // if we've been consumed, we're not in the result
+	      if (this.consumedBy) return false;
+	      if (this._isInResult !== undefined) return this._isInResult;
+	      var mpsBefore = this.beforeState().multiPolys;
+	      var mpsAfter = this.afterState().multiPolys;
+
+	      switch (operation.type) {
+	        case 'union':
+	          {
+	            // UNION - included iff:
+	            //  * On one side of us there is 0 poly interiors AND
+	            //  * On the other side there is 1 or more.
+	            var noBefores = mpsBefore.length === 0;
+	            var noAfters = mpsAfter.length === 0;
+	            this._isInResult = noBefores !== noAfters;
+	            break;
+	          }
 
-	    function save() {
-	        event.preventDefault();
-	        if (!context.inIntro() && !isSaving() && history.hasChanges()) {
-	            context.enter(modeSave(context));
-	        }
-	    }
+	        case 'intersection':
+	          {
+	            // INTERSECTION - included iff:
+	            //  * on one side of us all multipolys are rep. with poly interiors AND
+	            //  * on the other side of us, not all multipolys are repsented
+	            //    with poly interiors
+	            var least;
+	            var most;
+
+	            if (mpsBefore.length < mpsAfter.length) {
+	              least = mpsBefore.length;
+	              most = mpsAfter.length;
+	            } else {
+	              least = mpsAfter.length;
+	              most = mpsBefore.length;
+	            }
 
-	    function bgColor() {
-	        var step;
-	        if (_numChanges === 0) {
-	            return null;
-	        } else if (_numChanges <= 50) {
-	            step = _numChanges / 50;
-	            return d3_interpolateRgb('#fff', '#ff8')(step);  // white -> yellow
-	        } else {
-	            step = Math.min((_numChanges - 50) / 50, 1.0);
-	            return d3_interpolateRgb('#ff8', '#f88')(step);  // yellow -> red
-	        }
-	    }
+	            this._isInResult = most === operation.numMultiPolys && least < most;
+	            break;
+	          }
 
-	    function updateCount() {
-	        var val = history.difference().summary().length;
-	        if (val === _numChanges) { return; }
+	        case 'xor':
+	          {
+	            // XOR - included iff:
+	            //  * the difference between the number of multipolys represented
+	            //    with poly interiors on our two sides is an odd number
+	            var diff = Math.abs(mpsBefore.length - mpsAfter.length);
+	            this._isInResult = diff % 2 === 1;
+	            break;
+	          }
 
-	        _numChanges = val;
+	        case 'difference':
+	          {
+	            // DIFFERENCE included iff:
+	            //  * on exactly one side, we have just the subject
+	            var isJustSubject = function isJustSubject(mps) {
+	              return mps.length === 1 && mps[0].isSubject;
+	            };
 
-	        if (tooltipBehavior) {
-	            tooltipBehavior
-	                .title(_t(_numChanges > 0 ? 'save.help' : 'save.no_changes'))
-	                .keys([key]);
-	        }
+	            this._isInResult = isJustSubject(mpsBefore) !== isJustSubject(mpsAfter);
+	            break;
+	          }
 
-	        if (button) {
-	            button
-	                .classed('disabled', isDisabled())
-	                .style('background', bgColor());
+	        default:
+	          throw new Error("Unrecognized operation type found ".concat(operation.type));
+	      }
 
-	            button.select('span.count')
-	                .text(_numChanges);
-	        }
+	      return this._isInResult;
 	    }
+	  }], [{
+	    key: "fromRing",
+	    value: function fromRing(pt1, pt2, ring) {
+	      var leftPt, rightPt, winding; // ordering the two points according to sweep line ordering
 
+	      var cmpPts = SweepEvent$1.comparePoints(pt1, pt2);
 
-	    tool.render = function(selection) {
-	        tooltipBehavior = uiTooltip()
-	            .placement('bottom')
-	            .title(_t('save.no_changes'))
-	            .keys([key])
-	            .scrollContainer(context.container().select('.top-toolbar'));
-
-	        var lastPointerUpType;
+	      if (cmpPts < 0) {
+	        leftPt = pt1;
+	        rightPt = pt2;
+	        winding = 1;
+	      } else if (cmpPts > 0) {
+	        leftPt = pt2;
+	        rightPt = pt1;
+	        winding = -1;
+	      } else throw new Error("Tried to create degenerate segment at [".concat(pt1.x, ", ").concat(pt1.y, "]"));
 
-	        button = selection
-	            .append('button')
-	            .attr('class', 'save disabled bar-button')
-	            .on('pointerup', function() {
-	                lastPointerUpType = event.pointerType;
-	            })
-	            .on('click', function() {
-	                event.preventDefault();
-
-	                save();
+	      var leftSE = new SweepEvent$1(leftPt, true);
+	      var rightSE = new SweepEvent$1(rightPt, false);
+	      return new Segment(leftSE, rightSE, [ring], [winding]);
+	    }
+	  }]);
 
-	                if (_numChanges === 0 && (
-	                    lastPointerUpType === 'touch' ||
-	                    lastPointerUpType === 'pen')
-	                ) {
-	                    // there are no tooltips for touch interactions so flash feedback instead
-	                    context.ui().flash
-	                        .duration(2000)
-	                        .iconName('#iD-icon-save')
-	                        .iconClass('disabled')
-	                        .text(_t('save.no_changes'))();
-	                }
-	                lastPointerUpType = null;
-	            })
-	            .call(tooltipBehavior);
+	  return Segment;
+	}();
 
-	        button
-	            .call(svgIcon('#iD-icon-save'));
+	var RingIn = /*#__PURE__*/function () {
+	  function RingIn(geomRing, poly, isExterior) {
+	    _classCallCheck$1(this, RingIn);
 
-	        button
-	            .append('span')
-	            .attr('class', 'count')
-	            .attr('aria-hidden', 'true')
-	            .text('0');
+	    if (!Array.isArray(geomRing) || geomRing.length === 0) {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    }
 
-	        updateCount();
+	    this.poly = poly;
+	    this.isExterior = isExterior;
+	    this.segments = [];
 
+	    if (typeof geomRing[0][0] !== 'number' || typeof geomRing[0][1] !== 'number') {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    }
 
-	        context.keybinding()
-	            .on(key, save, true);
+	    var firstPoint = rounder.round(geomRing[0][0], geomRing[0][1]);
+	    this.bbox = {
+	      ll: {
+	        x: firstPoint.x,
+	        y: firstPoint.y
+	      },
+	      ur: {
+	        x: firstPoint.x,
+	        y: firstPoint.y
+	      }
+	    };
+	    var prevPoint = firstPoint;
 
+	    for (var i = 1, iMax = geomRing.length; i < iMax; i++) {
+	      if (typeof geomRing[i][0] !== 'number' || typeof geomRing[i][1] !== 'number') {
+	        throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	      }
 
-	        context.history()
-	            .on('change.save', updateCount);
+	      var point = rounder.round(geomRing[i][0], geomRing[i][1]); // skip repeated points
 
-	        context
-	            .on('enter.save', function() {
-	                if (button) {
-	                    button
-	                        .classed('disabled', isDisabled());
+	      if (point.x === prevPoint.x && point.y === prevPoint.y) continue;
+	      this.segments.push(Segment.fromRing(prevPoint, point, this));
+	      if (point.x < this.bbox.ll.x) this.bbox.ll.x = point.x;
+	      if (point.y < this.bbox.ll.y) this.bbox.ll.y = point.y;
+	      if (point.x > this.bbox.ur.x) this.bbox.ur.x = point.x;
+	      if (point.y > this.bbox.ur.y) this.bbox.ur.y = point.y;
+	      prevPoint = point;
+	    } // add segment from last to first if last is not the same as first
 
-	                    if (isSaving()) {
-	                        button.call(tooltipBehavior.hide);
-	                    }
-	                }
-	            });
-	    };
 
+	    if (firstPoint.x !== prevPoint.x || firstPoint.y !== prevPoint.y) {
+	      this.segments.push(Segment.fromRing(prevPoint, firstPoint, this));
+	    }
+	  }
 
-	    tool.uninstall = function() {
-	        context.keybinding()
-	            .off(key, true);
+	  _createClass$1(RingIn, [{
+	    key: "getSweepEvents",
+	    value: function getSweepEvents() {
+	      var sweepEvents = [];
 
-	        context.history()
-	            .on('change.save', null);
+	      for (var i = 0, iMax = this.segments.length; i < iMax; i++) {
+	        var segment = this.segments[i];
+	        sweepEvents.push(segment.leftSE);
+	        sweepEvents.push(segment.rightSE);
+	      }
 
-	        context
-	            .on('enter.save', null);
+	      return sweepEvents;
+	    }
+	  }]);
 
-	        button = null;
-	        tooltipBehavior = null;
-	    };
+	  return RingIn;
+	}();
 
-	    return tool;
-	}
+	var PolyIn = /*#__PURE__*/function () {
+	  function PolyIn(geomPoly, multiPoly) {
+	    _classCallCheck$1(this, PolyIn);
 
-	function uiToolSidebarToggle(context) {
+	    if (!Array.isArray(geomPoly)) {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    }
 
-	    var tool = {
-	        id: 'sidebar_toggle',
-	        label: _t('toolbar.inspect')
-	    };
+	    this.exteriorRing = new RingIn(geomPoly[0], this, true); // copy by value
 
-	    tool.render = function(selection) {
-	        selection
-	            .append('button')
-	            .attr('class', 'bar-button')
-	            .on('click', function() {
-	                context.ui().sidebar.toggle();
-	            })
-	            .call(uiTooltip()
-	                .placement('bottom')
-	                .title(_t('sidebar.tooltip'))
-	                .keys([_t('sidebar.key')])
-	                .scrollContainer(context.container().select('.top-toolbar'))
-	            )
-	            .call(svgIcon('#iD-icon-sidebar-' + (_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')));
+	    this.bbox = {
+	      ll: {
+	        x: this.exteriorRing.bbox.ll.x,
+	        y: this.exteriorRing.bbox.ll.y
+	      },
+	      ur: {
+	        x: this.exteriorRing.bbox.ur.x,
+	        y: this.exteriorRing.bbox.ur.y
+	      }
 	    };
+	    this.interiorRings = [];
 
-	    return tool;
-	}
+	    for (var i = 1, iMax = geomPoly.length; i < iMax; i++) {
+	      var ring = new RingIn(geomPoly[i], this, false);
+	      if (ring.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = ring.bbox.ll.x;
+	      if (ring.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = ring.bbox.ll.y;
+	      if (ring.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = ring.bbox.ur.x;
+	      if (ring.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = ring.bbox.ur.y;
+	      this.interiorRings.push(ring);
+	    }
 
-	function uiToolUndoRedo(context) {
+	    this.multiPoly = multiPoly;
+	  }
 
-	    var tool = {
-	        id: 'undo_redo',
-	        label: _t('toolbar.undo_redo')
-	    };
+	  _createClass$1(PolyIn, [{
+	    key: "getSweepEvents",
+	    value: function getSweepEvents() {
+	      var sweepEvents = this.exteriorRing.getSweepEvents();
 
-	    var commands = [{
-	        id: 'undo',
-	        cmd: uiCmd('⌘Z'),
-	        action: function() {
-	            context.undo();
-	        },
-	        annotation: function() {
-	            return context.history().undoAnnotation();
-	        },
-	        icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')
-	    }, {
-	        id: 'redo',
-	        cmd: uiCmd('⌘⇧Z'),
-	        action: function() {
-	            context.redo();
-	        },
-	        annotation: function() {
-	            return context.history().redoAnnotation();
-	        },
-	        icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'undo' : 'redo')
-	    }];
+	      for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
+	        var ringSweepEvents = this.interiorRings[i].getSweepEvents();
 
+	        for (var j = 0, jMax = ringSweepEvents.length; j < jMax; j++) {
+	          sweepEvents.push(ringSweepEvents[j]);
+	        }
+	      }
 
-	    function editable() {
-	        return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true /* ignore min zoom */);
+	      return sweepEvents;
 	    }
+	  }]);
 
+	  return PolyIn;
+	}();
 
-	    tool.render = function(selection) {
-	        var tooltipBehavior = uiTooltip()
-	            .placement('bottom')
-	            .title(function (d) {
-	                return d.annotation() ?
-	                    _t(d.id + '.tooltip', { action: d.annotation() }) :
-	                    _t(d.id + '.nothing');
-	            })
-	            .keys(function(d) {
-	                return [d.cmd];
-	            })
-	            .scrollContainer(context.container().select('.top-toolbar'));
-
-	        var lastPointerUpType;
-
-	        var buttons = selection.selectAll('button')
-	            .data(commands)
-	            .enter()
-	            .append('button')
-	            .attr('class', function(d) { return 'disabled ' + d.id + '-button bar-button'; })
-	            .on('pointerup', function() {
-	                // `pointerup` is always called before `click`
-	                lastPointerUpType = event.pointerType;
-	            })
-	            .on('click', function(d) {
-	                event.preventDefault();
-
-	                var annotation = d.annotation();
-
-	                if (editable() && annotation) {
-	                    d.action();
-	                }
-
-	                if (editable() && (
-	                    lastPointerUpType === 'touch' ||
-	                    lastPointerUpType === 'pen')
-	                ) {
-	                    // there are no tooltips for touch interactions so flash feedback instead
-
-	                    var text = annotation ?
-	                        _t(d.id + '.tooltip', { action: annotation }) :
-	                        _t(d.id + '.nothing');
-	                    context.ui().flash
-	                        .duration(2000)
-	                        .iconName('#' + d.icon)
-	                        .iconClass(annotation ? '' : 'disabled')
-	                        .text(text)();
-	                }
-	                lastPointerUpType = null;
-	            })
-	            .call(tooltipBehavior);
-
-	        buttons.each(function(d) {
-	            select(this)
-	                .call(svgIcon('#' + d.icon));
-	        });
+	var MultiPolyIn = /*#__PURE__*/function () {
+	  function MultiPolyIn(geom, isSubject) {
+	    _classCallCheck$1(this, MultiPolyIn);
 
-	        context.keybinding()
-	            .on(commands[0].cmd, function() {
-	                event.preventDefault();
-	                if (editable()) { commands[0].action(); }
-	            })
-	            .on(commands[1].cmd, function() {
-	                event.preventDefault();
-	                if (editable()) { commands[1].action(); }
-	            });
+	    if (!Array.isArray(geom)) {
+	      throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+	    }
 
+	    try {
+	      // if the input looks like a polygon, convert it to a multipolygon
+	      if (typeof geom[0][0][0] === 'number') geom = [geom];
+	    } catch (ex) {// The input is either malformed or has empty arrays.
+	      // In either case, it will be handled later on.
+	    }
 
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
+	    this.polys = [];
+	    this.bbox = {
+	      ll: {
+	        x: Number.POSITIVE_INFINITY,
+	        y: Number.POSITIVE_INFINITY
+	      },
+	      ur: {
+	        x: Number.NEGATIVE_INFINITY,
+	        y: Number.NEGATIVE_INFINITY
+	      }
+	    };
 
-	        context.map()
-	            .on('move.undo_redo', debouncedUpdate)
-	            .on('drawn.undo_redo', debouncedUpdate);
+	    for (var i = 0, iMax = geom.length; i < iMax; i++) {
+	      var poly = new PolyIn(geom[i], this);
+	      if (poly.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = poly.bbox.ll.x;
+	      if (poly.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = poly.bbox.ll.y;
+	      if (poly.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = poly.bbox.ur.x;
+	      if (poly.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = poly.bbox.ur.y;
+	      this.polys.push(poly);
+	    }
 
-	        context.history()
-	            .on('change.undo_redo', function(difference) {
-	                if (difference) { update(); }
-	            });
+	    this.isSubject = isSubject;
+	  }
 
-	        context
-	            .on('enter.undo_redo', update);
+	  _createClass$1(MultiPolyIn, [{
+	    key: "getSweepEvents",
+	    value: function getSweepEvents() {
+	      var sweepEvents = [];
 
+	      for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
+	        var polySweepEvents = this.polys[i].getSweepEvents();
 
-	        function update() {
-	            buttons
-	                .classed('disabled', function(d) {
-	                    return !editable() || !d.annotation();
-	                })
-	                .each(function() {
-	                    var selection = select(this);
-	                    if (!selection.select('.tooltip.in').empty()) {
-	                        selection.call(tooltipBehavior.updateContent);
-	                    }
-	                });
+	        for (var j = 0, jMax = polySweepEvents.length; j < jMax; j++) {
+	          sweepEvents.push(polySweepEvents[j]);
 	        }
-	    };
-
-	    tool.uninstall = function() {
-	        context.keybinding()
-	            .off(commands[0].cmd)
-	            .off(commands[1].cmd);
+	      }
 
-	        context.map()
-	            .on('move.undo_redo', null)
-	            .on('drawn.undo_redo', null);
+	      return sweepEvents;
+	    }
+	  }]);
 
-	        context.history()
-	            .on('change.undo_redo', null);
+	  return MultiPolyIn;
+	}();
 
-	        context
-	            .on('enter.undo_redo', null);
-	    };
+	var RingOut = /*#__PURE__*/function () {
+	  _createClass$1(RingOut, null, [{
+	    key: "factory",
 
-	    return tool;
-	}
+	    /* Given the segments from the sweep line pass, compute & return a series
+	     * of closed rings from all the segments marked to be part of the result */
+	    value: function factory(allSegments) {
+	      var ringsOut = [];
 
-	function uiTopToolbar(context) {
+	      for (var i = 0, iMax = allSegments.length; i < iMax; i++) {
+	        var segment = allSegments[i];
+	        if (!segment.isInResult() || segment.ringOut) continue;
+	        var prevEvent = null;
+	        var event = segment.leftSE;
+	        var nextEvent = segment.rightSE;
+	        var events = [event];
+	        var startingPoint = event.point;
+	        var intersectionLEs = [];
+	        /* Walk the chain of linked events to form a closed ring */
 
-	    var sidebarToggle = uiToolSidebarToggle(context),
-	        modes = uiToolOldDrawModes(context),
-	        notes = uiToolNotes(context),
-	        undoRedo = uiToolUndoRedo(context),
-	        save = uiToolSave(context);
+	        while (true) {
+	          prevEvent = event;
+	          event = nextEvent;
+	          events.push(event);
+	          /* Is the ring complete? */
 
-	    function notesEnabled() {
-	        var noteLayer = context.layers().layer('notes');
-	        return noteLayer && noteLayer.enabled();
-	    }
+	          if (event.point === startingPoint) break;
 
-	    function topToolbar(bar) {
+	          while (true) {
+	            var availableLEs = event.getAvailableLinkedEvents();
+	            /* Did we hit a dead end? This shouldn't happen. Indicates some earlier
+	             * part of the algorithm malfunctioned... please file a bug report. */
 
-	        bar.on('wheel.topToolbar', function() {
-	            if (!event.deltaX) {
-	                // translate vertical scrolling into horizontal scrolling in case
-	                // the user doesn't have an input device that can scroll horizontally
-	                bar.node().scrollLeft += event.deltaY;
+	            if (availableLEs.length === 0) {
+	              var firstPt = events[0].point;
+	              var lastPt = events[events.length - 1].point;
+	              throw new Error("Unable to complete output ring starting at [".concat(firstPt.x, ",") + " ".concat(firstPt.y, "]. Last matching segment found ends at") + " [".concat(lastPt.x, ", ").concat(lastPt.y, "]."));
 	            }
-	        });
+	            /* Only one way to go, so cotinue on the path */
 
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
-	        context.layers()
-	            .on('change.topToolbar', debouncedUpdate);
 
-	        update();
-
-	        function update() {
+	            if (availableLEs.length === 1) {
+	              nextEvent = availableLEs[0].otherSE;
+	              break;
+	            }
+	            /* We must have an intersection. Check for a completed loop */
 
-	            var tools = [
-	                sidebarToggle,
-	                'spacer',
-	                modes
-	            ];
 
-	            tools.push('spacer');
+	            var indexLE = null;
 
-	            if (notesEnabled()) {
-	                tools = tools.concat([notes, 'spacer']);
+	            for (var j = 0, jMax = intersectionLEs.length; j < jMax; j++) {
+	              if (intersectionLEs[j].point === event.point) {
+	                indexLE = j;
+	                break;
+	              }
 	            }
+	            /* Found a completed loop. Cut that off and make a ring */
 
-	            tools = tools.concat([undoRedo, save]);
-
-	            var toolbarItems = bar.selectAll('.toolbar-item')
-	                .data(tools, function(d) {
-	                    return d.id || d;
-	                });
 
-	            toolbarItems.exit()
-	                .each(function(d) {
-	                    if (d.uninstall) {
-	                        d.uninstall();
-	                    }
-	                })
-	                .remove();
-
-	            var itemsEnter = toolbarItems
-	                .enter()
-	                .append('div')
-	                .attr('class', function(d) {
-	                    var classes = 'toolbar-item ' + (d.id || d).replace('_', '-');
-	                    if (d.klass) { classes += ' ' + d.klass; }
-	                    return classes;
-	                });
+	            if (indexLE !== null) {
+	              var intersectionLE = intersectionLEs.splice(indexLE)[0];
+	              var ringEvents = events.splice(intersectionLE.index);
+	              ringEvents.unshift(ringEvents[0].otherSE);
+	              ringsOut.push(new RingOut(ringEvents.reverse()));
+	              continue;
+	            }
+	            /* register the intersection */
 
-	            var actionableItems = itemsEnter.filter(function(d) { return d !== 'spacer'; });
 
-	            actionableItems
-	                .append('div')
-	                .attr('class', 'item-content')
-	                .each(function(d) {
-	                    select(this).call(d.render, bar);
-	                });
+	            intersectionLEs.push({
+	              index: events.length,
+	              point: event.point
+	            });
+	            /* Choose the left-most option to continue the walk */
 
-	            actionableItems
-	                .append('div')
-	                .attr('class', 'item-label')
-	                .text(function(d) {
-	                    return d.label;
-	                });
+	            var comparator = event.getLeftmostComparator(prevEvent);
+	            nextEvent = availableLEs.sort(comparator)[0].otherSE;
+	            break;
+	          }
 	        }
 
+	        ringsOut.push(new RingOut(events));
+	      }
+
+	      return ringsOut;
 	    }
+	  }]);
 
-	    return topToolbar;
-	}
+	  function RingOut(events) {
+	    _classCallCheck$1(this, RingOut);
 
-	// these are module variables so they are preserved through a ui.restart()
-	var sawVersion = null;
-	var isNewVersion = false;
-	var isNewUser = false;
+	    this.events = events;
 
+	    for (var i = 0, iMax = events.length; i < iMax; i++) {
+	      events[i].segment.ringOut = this;
+	    }
 
-	function uiVersion(context) {
+	    this.poly = null;
+	  }
 
-	    var currVersion = context.version;
-	    var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
+	  _createClass$1(RingOut, [{
+	    key: "getGeom",
+	    value: function getGeom() {
+	      // Remove superfluous points (ie extra points along a straight line),
+	      var prevPt = this.events[0].point;
+	      var points = [prevPt];
 
-	    if (sawVersion === null && matchedVersion !== null) {
-	        if (corePreferences('sawVersion')) {
-	            isNewUser = false;
-	            isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
-	        } else {
-	            isNewUser = true;
-	            isNewVersion = true;
-	        }
-	        corePreferences('sawVersion', currVersion);
-	        sawVersion = currVersion;
-	    }
-
-	    return function(selection) {
-	        selection
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('href', 'https://github.com/openstreetmap/iD')
-	            .text(currVersion);
-
-	        // only show new version indicator to users that have used iD before
-	        if (isNewVersion && !isNewUser) {
-	            selection
-	                .append('div')
-	                .attr('class', 'badge')
-	                .append('a')
-	                .attr('target', '_blank')
-	                .attr('href', 'https://github.com/openstreetmap/iD/blob/release/CHANGELOG.md#whats-new')
-	                .call(svgIcon('#maki-gift-11'))
-	                .call(uiTooltip()
-	                    .title(_t('version.whats_new', { version: currVersion }))
-	                    .placement('top')
-	                );
-	        }
-	    };
-	}
+	      for (var i = 1, iMax = this.events.length - 1; i < iMax; i++) {
+	        var _pt = this.events[i].point;
+	        var _nextPt = this.events[i + 1].point;
+	        if (compareVectorAngles(_pt, prevPt, _nextPt) === 0) continue;
+	        points.push(_pt);
+	        prevPt = _pt;
+	      } // ring was all (within rounding error of angle calc) colinear points
 
-	function uiZoom(context) {
 
-	    var zooms = [{
-	        id: 'zoom-in',
-	        icon: 'iD-icon-plus',
-	        title: _t('zoom.in'),
-	        action: zoomIn,
-	        disabled: function() {
-	            return !context.map().canZoomIn();
-	        },
-	        disabledTitle: _t('zoom.disabled.in'),
-	        key: '+'
-	    }, {
-	        id: 'zoom-out',
-	        icon: 'iD-icon-minus',
-	        title: _t('zoom.out'),
-	        action: zoomOut,
-	        disabled: function() {
-	            return !context.map().canZoomOut();
-	        },
-	        disabledTitle: _t('zoom.disabled.out'),
-	        key: '-'
-	    }];
+	      if (points.length === 1) return null; // check if the starting point is necessary
 
-	    function zoomIn() {
-	        event.preventDefault();
-	        context.map().zoomIn();
-	    }
+	      var pt = points[0];
+	      var nextPt = points[1];
+	      if (compareVectorAngles(pt, prevPt, nextPt) === 0) points.shift();
+	      points.push(points[0]);
+	      var step = this.isExteriorRing() ? 1 : -1;
+	      var iStart = this.isExteriorRing() ? 0 : points.length - 1;
+	      var iEnd = this.isExteriorRing() ? points.length : -1;
+	      var orderedPoints = [];
+
+	      for (var _i = iStart; _i != iEnd; _i += step) {
+	        orderedPoints.push([points[_i].x, points[_i].y]);
+	      }
 
-	    function zoomOut() {
-	        event.preventDefault();
-	        context.map().zoomOut();
+	      return orderedPoints;
 	    }
+	  }, {
+	    key: "isExteriorRing",
+	    value: function isExteriorRing() {
+	      if (this._isExteriorRing === undefined) {
+	        var enclosing = this.enclosingRing();
+	        this._isExteriorRing = enclosing ? !enclosing.isExteriorRing() : true;
+	      }
 
-	    function zoomInFurther() {
-	        event.preventDefault();
-	        context.map().zoomInFurther();
+	      return this._isExteriorRing;
 	    }
+	  }, {
+	    key: "enclosingRing",
+	    value: function enclosingRing() {
+	      if (this._enclosingRing === undefined) {
+	        this._enclosingRing = this._calcEnclosingRing();
+	      }
 
-	    function zoomOutFurther() {
-	        event.preventDefault();
-	        context.map().zoomOutFurther();
+	      return this._enclosingRing;
 	    }
+	    /* Returns the ring that encloses this one, if any */
 
-	    return function(selection) {
-	        var tooltipBehavior = uiTooltip()
-	            .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            .title(function(d) {
-	                if (d.disabled()) {
-	                    return d.disabledTitle;
-	                }
-	                return d.title;
-	            })
-	            .keys(function(d) {
-	                return [d.key];
-	            });
+	  }, {
+	    key: "_calcEnclosingRing",
+	    value: function _calcEnclosingRing() {
+	      // start with the ealier sweep line event so that the prevSeg
+	      // chain doesn't lead us inside of a loop of ours
+	      var leftMostEvt = this.events[0];
+
+	      for (var i = 1, iMax = this.events.length; i < iMax; i++) {
+	        var evt = this.events[i];
+	        if (SweepEvent$1.compare(leftMostEvt, evt) > 0) leftMostEvt = evt;
+	      }
 
-	        var lastPointerUpType;
+	      var prevSeg = leftMostEvt.segment.prevInResult();
+	      var prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
 
-	        var buttons = selection.selectAll('button')
-	            .data(zooms)
-	            .enter()
-	            .append('button')
-	            .attr('class', function(d) { return d.id; })
-	            .on('pointerup.editor', function() {
-	                lastPointerUpType = event.pointerType;
-	            })
-	            .on('click.editor', function(d) {
-	                if (!d.disabled()) {
-	                    d.action();
-	                } else if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
-	                    context.ui().flash
-	                        .duration(2000)
-	                        .iconName('#' + d.icon)
-	                        .iconClass('disabled')
-	                        .text(d.disabledTitle)();
-	                }
-	                lastPointerUpType = null;
-	            })
-	            .call(tooltipBehavior);
+	      while (true) {
+	        // no segment found, thus no ring can enclose us
+	        if (!prevSeg) return null; // no segments below prev segment found, thus the ring of the prev
+	        // segment must loop back around and enclose us
 
-	        buttons.each(function(d) {
-	            select(this)
-	                .call(svgIcon('#' + d.icon, 'light'));
-	        });
+	        if (!prevPrevSeg) return prevSeg.ringOut; // if the two segments are of different rings, the ring of the prev
+	        // segment must either loop around us or the ring of the prev prev
+	        // seg, which would make us and the ring of the prev peers
 
-	        ['plus', 'ffplus', '=', 'ffequals'].forEach(function(key) {
-	            context.keybinding().on([key], zoomIn);
-	            context.keybinding().on([uiCmd('⌘' + key)], zoomInFurther);
-	        });
+	        if (prevPrevSeg.ringOut !== prevSeg.ringOut) {
+	          if (prevPrevSeg.ringOut.enclosingRing() !== prevSeg.ringOut) {
+	            return prevSeg.ringOut;
+	          } else return prevSeg.ringOut.enclosingRing();
+	        } // two segments are from the same ring, so this was a penisula
+	        // of that ring. iterate downward, keep searching
 
-	        ['_', '-', 'ffminus', 'dash'].forEach(function(key) {
-	            context.keybinding().on([key], zoomOut);
-	            context.keybinding().on([uiCmd('⌘' + key)], zoomOutFurther);
-	        });
 
-	        function updateButtonStates() {
-	            buttons
-	                .classed('disabled', function(d) {
-	                    return d.disabled();
-	                })
-	                .each(function() {
-	                    var selection = select(this);
-	                    if (!selection.select('.tooltip.in').empty()) {
-	                        selection.call(tooltipBehavior.updateContent);
-	                    }
-	                });
-	        }
+	        prevSeg = prevPrevSeg.prevInResult();
+	        prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+	      }
+	    }
+	  }]);
 
-	        updateButtonStates();
+	  return RingOut;
+	}();
 
-	        context.map().on('move.uiZoom', updateButtonStates);
-	    };
-	}
+	var PolyOut = /*#__PURE__*/function () {
+	  function PolyOut(exteriorRing) {
+	    _classCallCheck$1(this, PolyOut);
 
-	function uiZoomToSelection(context) {
+	    this.exteriorRing = exteriorRing;
+	    exteriorRing.poly = this;
+	    this.interiorRings = [];
+	  }
 
-	    function isDisabled() {
-	        var mode = context.mode();
-	        return !mode || !mode.zoomToSelected;
+	  _createClass$1(PolyOut, [{
+	    key: "addInterior",
+	    value: function addInterior(ring) {
+	      this.interiorRings.push(ring);
+	      ring.poly = this;
 	    }
+	  }, {
+	    key: "getGeom",
+	    value: function getGeom() {
+	      var geom = [this.exteriorRing.getGeom()]; // exterior ring was all (within rounding error of angle calc) colinear points
 
-	    var _lastPointerUpType;
-
-	    function pointerup() {
-	        _lastPointerUpType = event.pointerType;
-	    }
+	      if (geom[0] === null) return null;
 
-	    function click() {
-	        event.preventDefault();
+	      for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
+	        var ringGeom = this.interiorRings[i].getGeom(); // interior ring was all (within rounding error of angle calc) colinear points
 
-	        if (isDisabled()) {
-	            if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
-	                context.ui().flash
-	                    .duration(2000)
-	                    .iconName('#iD-icon-framed-dot')
-	                    .iconClass('disabled')
-	                    .text(_t('inspector.zoom_to.no_selection'))();
-	            }
-	        } else {
-	            var mode = context.mode();
-	            if (mode && mode.zoomToSelected) {
-	                mode.zoomToSelected();
-	            }
-	        }
+	        if (ringGeom === null) continue;
+	        geom.push(ringGeom);
+	      }
 
-	        _lastPointerUpType = null;
+	      return geom;
 	    }
+	  }]);
 
-	    return function(selection) {
+	  return PolyOut;
+	}();
 
-	        var tooltipBehavior = uiTooltip()
-	            .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            .title(function() {
-	                if (isDisabled()) {
-	                    return _t('inspector.zoom_to.no_selection');
-	                }
-	                return _t('inspector.zoom_to.title');
-	            })
-	            .keys([_t('inspector.zoom_to.key')]);
-
-	        var button = selection
-	            .append('button')
-	            .on('pointerup', pointerup)
-	            .on('click', click)
-	            .call(svgIcon('#iD-icon-framed-dot', 'light'))
-	            .call(tooltipBehavior);
-
-	        function setEnabledState() {
-	            button.classed('disabled', isDisabled());
-	            if (!button.select('.tooltip.in').empty()) {
-	                button.call(tooltipBehavior.updateContent);
-	            }
-	        }
+	var MultiPolyOut = /*#__PURE__*/function () {
+	  function MultiPolyOut(rings) {
+	    _classCallCheck$1(this, MultiPolyOut);
+
+	    this.rings = rings;
+	    this.polys = this._composePolys(rings);
+	  }
 
-	        context.on('enter.uiZoomToSelection', setEnabledState);
+	  _createClass$1(MultiPolyOut, [{
+	    key: "getGeom",
+	    value: function getGeom() {
+	      var geom = [];
 
-	        setEnabledState();
-	    };
-	}
+	      for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
+	        var polyGeom = this.polys[i].getGeom(); // exterior ring was all (within rounding error of angle calc) colinear points
 
-	function uiPane(id, context) {
+	        if (polyGeom === null) continue;
+	        geom.push(polyGeom);
+	      }
 
-	    var _key;
-	    var _title = '';
-	    var _description = '';
-	    var _iconName = '';
-	    var _sections; // array of uiSection objects
+	      return geom;
+	    }
+	  }, {
+	    key: "_composePolys",
+	    value: function _composePolys(rings) {
+	      var polys = [];
 
-	    var _paneSelection = select(null);
+	      for (var i = 0, iMax = rings.length; i < iMax; i++) {
+	        var ring = rings[i];
+	        if (ring.poly) continue;
+	        if (ring.isExteriorRing()) polys.push(new PolyOut(ring));else {
+	          var enclosingRing = ring.enclosingRing();
+	          if (!enclosingRing.poly) polys.push(new PolyOut(enclosingRing));
+	          enclosingRing.poly.addInterior(ring);
+	        }
+	      }
 
-	    var _paneTooltip;
+	      return polys;
+	    }
+	  }]);
 
-	    var pane = {
-	        id: id
-	    };
+	  return MultiPolyOut;
+	}();
+	/**
+	 * NOTE:  We must be careful not to change any segments while
+	 *        they are in the SplayTree. AFAIK, there's no way to tell
+	 *        the tree to rebalance itself - thus before splitting
+	 *        a segment that's in the tree, we remove it from the tree,
+	 *        do the split, then re-insert it. (Even though splitting a
+	 *        segment *shouldn't* change its correct position in the
+	 *        sweep line tree, the reality is because of rounding errors,
+	 *        it sometimes does.)
+	 */
 
-	    pane.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = val;
-	        return pane;
-	    };
 
-	    pane.key = function(val) {
-	        if (!arguments.length) { return _key; }
-	        _key = val;
-	        return pane;
-	    };
+	var SweepLine = /*#__PURE__*/function () {
+	  function SweepLine(queue) {
+	    var comparator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Segment.compare;
 
-	    pane.description = function(val) {
-	        if (!arguments.length) { return _description; }
-	        _description = val;
-	        return pane;
-	    };
+	    _classCallCheck$1(this, SweepLine);
 
-	    pane.iconName = function(val) {
-	        if (!arguments.length) { return _iconName; }
-	        _iconName = val;
-	        return pane;
-	    };
+	    this.queue = queue;
+	    this.tree = new Tree(comparator);
+	    this.segments = [];
+	  }
 
-	    pane.sections = function(val) {
-	        if (!arguments.length) { return _sections; }
-	        _sections = val;
-	        return pane;
-	    };
+	  _createClass$1(SweepLine, [{
+	    key: "process",
+	    value: function process(event) {
+	      var segment = event.segment;
+	      var newEvents = []; // if we've already been consumed by another segment,
+	      // clean up our body parts and get out
 
-	    pane.selection = function() {
-	        return _paneSelection;
-	    };
+	      if (event.consumedBy) {
+	        if (event.isLeft) this.queue.remove(event.otherSE);else this.tree.remove(segment);
+	        return newEvents;
+	      }
 
-	    function hidePane() {
-	        context.ui().togglePanes();
-	    }
+	      var node = event.isLeft ? this.tree.insert(segment) : this.tree.find(segment);
+	      if (!node) throw new Error("Unable to find segment #".concat(segment.id, " ") + "[".concat(segment.leftSE.point.x, ", ").concat(segment.leftSE.point.y, "] -> ") + "[".concat(segment.rightSE.point.x, ", ").concat(segment.rightSE.point.y, "] ") + 'in SweepLine tree. Please submit a bug report.');
+	      var prevNode = node;
+	      var nextNode = node;
+	      var prevSeg = undefined;
+	      var nextSeg = undefined; // skip consumed segments still in tree
 
-	    pane.togglePane = function() {
-	        if (event) { event.preventDefault(); }
-	        _paneTooltip.hide();
-	        context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
-	    };
+	      while (prevSeg === undefined) {
+	        prevNode = this.tree.prev(prevNode);
+	        if (prevNode === null) prevSeg = null;else if (prevNode.key.consumedBy === undefined) prevSeg = prevNode.key;
+	      } // skip consumed segments still in tree
 
-	    pane.renderToggleButton = function(selection) {
 
-	        if (!_paneTooltip) {
-	            _paneTooltip = uiTooltip()
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	                .title(_description)
-	                .keys([_key]);
-	        }
+	      while (nextSeg === undefined) {
+	        nextNode = this.tree.next(nextNode);
+	        if (nextNode === null) nextSeg = null;else if (nextNode.key.consumedBy === undefined) nextSeg = nextNode.key;
+	      }
 
-	        selection
-	            .append('button')
-	            .on('click', pane.togglePane)
-	            .call(svgIcon('#' + _iconName, 'light'))
-	            .call(_paneTooltip);
-	    };
+	      if (event.isLeft) {
+	        // Check for intersections against the previous segment in the sweep line
+	        var prevMySplitter = null;
 
-	    pane.renderContent = function(selection) {
-	        // override to fully customize content
+	        if (prevSeg) {
+	          var prevInter = prevSeg.getIntersection(segment);
 
-	        if (_sections) {
-	            _sections.forEach(function(section) {
-	                selection.call(section.render);
-	            });
-	        }
-	    };
+	          if (prevInter !== null) {
+	            if (!segment.isAnEndpoint(prevInter)) prevMySplitter = prevInter;
 
-	    pane.renderPane = function(selection) {
+	            if (!prevSeg.isAnEndpoint(prevInter)) {
+	              var newEventsFromSplit = this._splitSafely(prevSeg, prevInter);
 
-	        _paneSelection = selection
-	            .append('div')
-	            .attr('class', 'fillL map-pane hide ' + id + '-pane')
-	            .attr('pane', id);
+	              for (var i = 0, iMax = newEventsFromSplit.length; i < iMax; i++) {
+	                newEvents.push(newEventsFromSplit[i]);
+	              }
+	            }
+	          }
+	        } // Check for intersections against the next segment in the sweep line
 
-	        var heading = _paneSelection
-	            .append('div')
-	            .attr('class', 'pane-heading');
 
-	        heading
-	            .append('h2')
-	            .text(_title);
+	        var nextMySplitter = null;
 
-	        heading
-	            .append('button')
-	            .on('click', hidePane)
-	            .call(svgIcon('#iD-icon-close'));
+	        if (nextSeg) {
+	          var nextInter = nextSeg.getIntersection(segment);
 
+	          if (nextInter !== null) {
+	            if (!segment.isAnEndpoint(nextInter)) nextMySplitter = nextInter;
 
-	        _paneSelection
-	            .append('div')
-	            .attr('class', 'pane-content')
-	            .call(pane.renderContent);
+	            if (!nextSeg.isAnEndpoint(nextInter)) {
+	              var _newEventsFromSplit = this._splitSafely(nextSeg, nextInter);
 
-	        if (_key) {
-	            context.keybinding()
-	                .on(_key, pane.togglePane);
-	        }
-	    };
+	              for (var _i = 0, _iMax = _newEventsFromSplit.length; _i < _iMax; _i++) {
+	                newEvents.push(_newEventsFromSplit[_i]);
+	              }
+	            }
+	          }
+	        } // For simplicity, even if we find more than one intersection we only
+	        // spilt on the 'earliest' (sweep-line style) of the intersections.
+	        // The other intersection will be handled in a future process().
 
-	    return pane;
-	}
 
-	function uiSectionBackgroundDisplayOptions(context) {
+	        if (prevMySplitter !== null || nextMySplitter !== null) {
+	          var mySplitter = null;
+	          if (prevMySplitter === null) mySplitter = nextMySplitter;else if (nextMySplitter === null) mySplitter = prevMySplitter;else {
+	            var cmpSplitters = SweepEvent$1.comparePoints(prevMySplitter, nextMySplitter);
+	            mySplitter = cmpSplitters <= 0 ? prevMySplitter : nextMySplitter;
+	          } // Rounding errors can cause changes in ordering,
+	          // so remove afected segments and right sweep events before splitting
 
-	    var section = uiSection('background-display-options', context)
-	        .title(_t('background.display_options'))
-	        .disclosureContent(renderDisclosureContent);
+	          this.queue.remove(segment.rightSE);
+	          newEvents.push(segment.rightSE);
 
-	    var _detected = utilDetect();
-	    var _storedOpacity = corePreferences('background-opacity');
-	    var _minVal = 0.25;
-	    var _maxVal = _detected.cssfilters ? 2 : 1;
+	          var _newEventsFromSplit2 = segment.split(mySplitter);
 
-	    var _sliders = _detected.cssfilters
-	        ? ['brightness', 'contrast', 'saturation', 'sharpness']
-	        : ['brightness'];
+	          for (var _i2 = 0, _iMax2 = _newEventsFromSplit2.length; _i2 < _iMax2; _i2++) {
+	            newEvents.push(_newEventsFromSplit2[_i2]);
+	          }
+	        }
 
-	    var _options = {
-	        brightness: (_storedOpacity !== null ? (+_storedOpacity) : 1),
-	        contrast: 1,
-	        saturation: 1,
-	        sharpness: 1
-	    };
+	        if (newEvents.length > 0) {
+	          // We found some intersections, so re-do the current event to
+	          // make sure sweep line ordering is totally consistent for later
+	          // use with the segment 'prev' pointers
+	          this.tree.remove(segment);
+	          newEvents.push(event);
+	        } else {
+	          // done with left event
+	          this.segments.push(segment);
+	          segment.prev = prevSeg;
+	        }
+	      } else {
+	        // event.isRight
+	        // since we're about to be removed from the sweep line, check for
+	        // intersections between our previous and next segments
+	        if (prevSeg && nextSeg) {
+	          var inter = prevSeg.getIntersection(nextSeg);
+
+	          if (inter !== null) {
+	            if (!prevSeg.isAnEndpoint(inter)) {
+	              var _newEventsFromSplit3 = this._splitSafely(prevSeg, inter);
+
+	              for (var _i3 = 0, _iMax3 = _newEventsFromSplit3.length; _i3 < _iMax3; _i3++) {
+	                newEvents.push(_newEventsFromSplit3[_i3]);
+	              }
+	            }
 
-	    function clamp(x, min, max) {
-	        return Math.max(min, Math.min(x, max));
-	    }
+	            if (!nextSeg.isAnEndpoint(inter)) {
+	              var _newEventsFromSplit4 = this._splitSafely(nextSeg, inter);
 
-	    function updateValue(d, val) {
-	        if (!val && event && event.target) {
-	            val = event.target.value;
+	              for (var _i4 = 0, _iMax4 = _newEventsFromSplit4.length; _i4 < _iMax4; _i4++) {
+	                newEvents.push(_newEventsFromSplit4[_i4]);
+	              }
+	            }
+	          }
 	        }
 
-	        val = clamp(val, _minVal, _maxVal);
+	        this.tree.remove(segment);
+	      }
 
-	        _options[d] = val;
-	        context.background()[d](val);
+	      return newEvents;
+	    }
+	    /* Safely split a segment that is currently in the datastructures
+	     * IE - a segment other than the one that is currently being processed. */
 
-	        if (d === 'brightness') {
-	            corePreferences('background-opacity', val);
-	        }
+	  }, {
+	    key: "_splitSafely",
+	    value: function _splitSafely(seg, pt) {
+	      // Rounding errors can cause changes in ordering,
+	      // so remove afected segments and right sweep events before splitting
+	      // removeNode() doesn't work, so have re-find the seg
+	      // https://github.com/w8r/splay-tree/pull/5
+	      this.tree.remove(seg);
+	      var rightSE = seg.rightSE;
+	      this.queue.remove(rightSE);
+	      var newEvents = seg.split(pt);
+	      newEvents.push(rightSE); // splitting can trigger consumption
 
-	        section.reRender();
+	      if (seg.consumedBy === undefined) this.tree.insert(seg);
+	      return newEvents;
 	    }
+	  }]);
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.display-options-container')
-	            .data([0]);
+	  return SweepLine;
+	}();
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'display-options-container controls-list');
+	var POLYGON_CLIPPING_MAX_QUEUE_SIZE = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_QUEUE_SIZE || 1000000;
+	var POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS || 1000000;
 
-	        // add slider controls
-	        var slidersEnter = containerEnter.selectAll('.display-control')
-	            .data(_sliders)
-	            .enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'display-control display-control-' + d; });
-
-	        slidersEnter
-	            .append('h5')
-	            .text(function(d) { return _t('background.' + d); })
-	            .append('span')
-	            .attr('class', function(d) { return 'display-option-value display-option-value-' + d; });
-
-	        slidersEnter
-	            .append('input')
-	            .attr('class', function(d) { return 'display-option-input display-option-input-' + d; })
-	            .attr('type', 'range')
-	            .attr('min', _minVal)
-	            .attr('max', _maxVal)
-	            .attr('step', '0.05')
-	            .on('input', function(d) {
-	                var val = select(this).property('value');
-	                updateValue(d, val);
-	            });
+	var Operation = /*#__PURE__*/function () {
+	  function Operation() {
+	    _classCallCheck$1(this, Operation);
+	  }
 
-	        slidersEnter
-	            .append('button')
-	            .attr('title', _t('background.reset'))
-	            .attr('class', function(d) { return 'display-option-reset display-option-reset-' + d; })
-	            .on('click', function(d) {
-	                if (event.button !== 0) { return; }
-	                updateValue(d, 1);
-	            })
-	            .call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
-
-	        // reset all button
-	        containerEnter
-	            .append('a')
-	            .attr('class', 'display-option-resetlink')
-	            .attr('href', '#')
-	            .text(_t('background.reset_all'))
-	            .on('click', function() {
-	                for (var i = 0; i < _sliders.length; i++) {
-	                    updateValue(_sliders[i],1);
-	                }
-	            });
+	  _createClass$1(Operation, [{
+	    key: "run",
+	    value: function run(type, geom, moreGeoms) {
+	      operation.type = type;
+	      rounder.reset();
+	      /* Convert inputs to MultiPoly objects */
 
-	        // update
-	        container = containerEnter
-	            .merge(container);
+	      var multipolys = [new MultiPolyIn(geom, true)];
 
-	        container.selectAll('.display-option-input')
-	            .property('value', function(d) { return _options[d]; });
+	      for (var i = 0, iMax = moreGeoms.length; i < iMax; i++) {
+	        multipolys.push(new MultiPolyIn(moreGeoms[i], false));
+	      }
 
-	        container.selectAll('.display-option-value')
-	            .text(function(d) { return Math.floor(_options[d] * 100) + '%'; });
+	      operation.numMultiPolys = multipolys.length;
+	      /* BBox optimization for difference operation
+	       * If the bbox of a multipolygon that's part of the clipping doesn't
+	       * intersect the bbox of the subject at all, we can just drop that
+	       * multiploygon. */
 
-	        container.selectAll('.display-option-reset')
-	            .classed('disabled', function(d) { return _options[d] === 1; });
+	      if (operation.type === 'difference') {
+	        // in place removal
+	        var subject = multipolys[0];
+	        var _i = 1;
 
-	        // first time only, set brightness if needed
-	        if (containerEnter.size() && _options.brightness !== 1) {
-	            context.background().brightness(_options.brightness);
+	        while (_i < multipolys.length) {
+	          if (getBboxOverlap(multipolys[_i].bbox, subject.bbox) !== null) _i++;else multipolys.splice(_i, 1);
 	        }
-	    }
-
-	    return section;
-	}
+	      }
+	      /* BBox optimization for intersection operation
+	       * If we can find any pair of multipolygons whose bbox does not overlap,
+	       * then the result will be empty. */
 
-	function uiSettingsCustomBackground() {
-	    var dispatch$1 = dispatch('change');
 
-	    function render(selection) {
-	        // keep separate copies of original and current settings
-	        var _origSettings = {
-	            template: corePreferences('background-custom-template')
-	        };
-	        var _currSettings = {
-	            template: corePreferences('background-custom-template')
-	        };
+	      if (operation.type === 'intersection') {
+	        // TODO: this is O(n^2) in number of polygons. By sorting the bboxes,
+	        //       it could be optimized to O(n * ln(n))
+	        for (var _i2 = 0, _iMax = multipolys.length; _i2 < _iMax; _i2++) {
+	          var mpA = multipolys[_i2];
 
-	        var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
-	        var modal = uiConfirm(selection).okButton();
-
-	        modal
-	            .classed('settings-modal settings-custom-background', true);
-
-	        modal.select('.modal-section.header')
-	            .append('h3')
-	            .text(_t('settings.custom_background.header'));
-
-
-	        var textSection = modal.select('.modal-section.message-text');
-
-	        var instructions =
-	            (_t('settings.custom_background.instructions.info')) + "\n" +
-	            '\n' +
-	            "#### " + (_t('settings.custom_background.instructions.wms.tokens_label')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.wms.tokens.proj')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.wms.tokens.wkid')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.wms.tokens.dimensions')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.wms.tokens.bbox')) + "\n" +
-	            '\n' +
-	            "#### " + (_t('settings.custom_background.instructions.tms.tokens_label')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.xyz')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.flipped_y')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.switch')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.quadtile')) + "\n" +
-	            "* " + (_t('settings.custom_background.instructions.tms.tokens.scale_factor')) + "\n" +
-	            '\n' +
-	            "#### " + (_t('settings.custom_background.instructions.example')) + "\n" +
-	            "`" + example + "`";
-
-	        textSection
-	            .append('div')
-	            .attr('class', 'instructions-template')
-	            .html(marked_1(instructions));
+	          for (var j = _i2 + 1, jMax = multipolys.length; j < jMax; j++) {
+	            if (getBboxOverlap(mpA.bbox, multipolys[j].bbox) === null) return [];
+	          }
+	        }
+	      }
+	      /* Put segment endpoints in a priority queue */
 
-	        textSection
-	            .append('textarea')
-	            .attr('class', 'field-template')
-	            .attr('placeholder', _t('settings.custom_background.template.placeholder'))
-	            .call(utilNoAuto)
-	            .property('value', _currSettings.template);
 
+	      var queue = new Tree(SweepEvent$1.compare);
 
-	        // insert a cancel button
-	        var buttonSection = modal.select('.modal-section.buttons');
+	      for (var _i3 = 0, _iMax2 = multipolys.length; _i3 < _iMax2; _i3++) {
+	        var sweepEvents = multipolys[_i3].getSweepEvents();
 
-	        buttonSection
-	            .insert('button', '.ok-button')
-	            .attr('class', 'button cancel-button secondary-action')
-	            .text(_t('confirm.cancel'));
+	        for (var _j = 0, _jMax = sweepEvents.length; _j < _jMax; _j++) {
+	          queue.insert(sweepEvents[_j]);
 
+	          if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
+	            // prevents an infinite loop, an otherwise common manifestation of bugs
+	            throw new Error('Infinite loop when putting segment endpoints in a priority queue ' + '(queue size too big). Please file a bug report.');
+	          }
+	        }
+	      }
+	      /* Pass the sweep line over those endpoints */
 
-	        buttonSection.select('.cancel-button')
-	            .on('click.cancel', clickCancel);
 
-	        buttonSection.select('.ok-button')
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.save', clickSave);
+	      var sweepLine = new SweepLine(queue);
+	      var prevQueueSize = queue.size;
+	      var node = queue.pop();
 
+	      while (node) {
+	        var evt = node.key;
 
-	        function isSaveDisabled() {
-	            return null;
+	        if (queue.size === prevQueueSize) {
+	          // prevents an infinite loop, an otherwise common manifestation of bugs
+	          var seg = evt.segment;
+	          throw new Error("Unable to pop() ".concat(evt.isLeft ? 'left' : 'right', " SweepEvent ") + "[".concat(evt.point.x, ", ").concat(evt.point.y, "] from segment #").concat(seg.id, " ") + "[".concat(seg.leftSE.point.x, ", ").concat(seg.leftSE.point.y, "] -> ") + "[".concat(seg.rightSE.point.x, ", ").concat(seg.rightSE.point.y, "] from queue. ") + 'Please file a bug report.');
 	        }
 
+	        if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
+	          // prevents an infinite loop, an otherwise common manifestation of bugs
+	          throw new Error('Infinite loop when passing sweep line over endpoints ' + '(queue size too big). Please file a bug report.');
+	        }
 
-	        // restore the original template
-	        function clickCancel() {
-	            textSection.select('.field-template').property('value', _origSettings.template);
-	            corePreferences('background-custom-template', _origSettings.template);
-	            this.blur();
-	            modal.close();
+	        if (sweepLine.segments.length > POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS) {
+	          // prevents an infinite loop, an otherwise common manifestation of bugs
+	          throw new Error('Infinite loop when passing sweep line over endpoints ' + '(too many sweep line segments). Please file a bug report.');
 	        }
 
-	        // accept the current template
-	        function clickSave() {
-	            _currSettings.template = textSection.select('.field-template').property('value');
-	            corePreferences('background-custom-template', _currSettings.template);
-	            this.blur();
-	            modal.close();
-	            dispatch$1.call('change', this, _currSettings);
+	        var newEvents = sweepLine.process(evt);
+
+	        for (var _i4 = 0, _iMax3 = newEvents.length; _i4 < _iMax3; _i4++) {
+	          var _evt = newEvents[_i4];
+	          if (_evt.consumedBy === undefined) queue.insert(_evt);
 	        }
-	    }
 
-	    return utilRebind(render, dispatch$1, 'on');
-	}
+	        prevQueueSize = queue.size;
+	        node = queue.pop();
+	      } // free some memory we don't need anymore
 
-	function uiSectionBackgroundList(context) {
 
-	    var _backgroundList = select(null);
+	      rounder.reset();
+	      /* Collect and compile segments we're keeping into a multipolygon */
 
-	    var _customSource = context.background().findSource('custom');
+	      var ringsOut = RingOut.factory(sweepLine.segments);
+	      var result = new MultiPolyOut(ringsOut);
+	      return result.getGeom();
+	    }
+	  }]);
 
-	    var _settingsCustomBackground = uiSettingsCustomBackground()
-	        .on('change', customChanged);
+	  return Operation;
+	}(); // singleton available by import
 
-	    var section = uiSection('background-list', context)
-	        .title(_t('background.backgrounds'))
-	        .disclosureContent(renderDisclosureContent);
 
-	    function previousBackgroundID() {
-	        return corePreferences('background-last-used-toggle');
-	    }
+	var operation = new Operation();
 
-	    function renderDisclosureContent(selection) {
+	var union$1 = function union(geom) {
+	  for (var _len = arguments.length, moreGeoms = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+	    moreGeoms[_key - 1] = arguments[_key];
+	  }
 
-	        // the background list
-	        var container = selection.selectAll('.layer-background-list')
-	            .data([0]);
+	  return operation.run('union', geom, moreGeoms);
+	};
 
-	        _backgroundList = container.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-background-list')
-	            .attr('dir', 'auto')
-	            .merge(container);
+	var intersection$1$1 = function intersection(geom) {
+	  for (var _len2 = arguments.length, moreGeoms = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
+	    moreGeoms[_key2 - 1] = arguments[_key2];
+	  }
 
+	  return operation.run('intersection', geom, moreGeoms);
+	};
 
-	        // add minimap toggle below list
-	        var bgExtrasListEnter = selection.selectAll('.bg-extras-list')
-	            .data([0])
-	            .enter()
-	            .append('ul')
-	            .attr('class', 'layer-list bg-extras-list');
-
-	        var minimapLabelEnter = bgExtrasListEnter
-	            .append('li')
-	            .attr('class', 'minimap-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('background.minimap.tooltip'))
-	                .keys([_t('background.minimap.key')])
-	                .placement('top')
-	            );
-
-	        minimapLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                uiMapInMap.toggle();
-	            });
+	var xor = function xor(geom) {
+	  for (var _len3 = arguments.length, moreGeoms = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
+	    moreGeoms[_key3 - 1] = arguments[_key3];
+	  }
 
-	        minimapLabelEnter
-	            .append('span')
-	            .text(_t('background.minimap.description'));
-
-
-	        var panelLabelEnter = bgExtrasListEnter
-	            .append('li')
-	            .attr('class', 'background-panel-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('background.panel.tooltip'))
-	                .keys([uiCmd('⌘⇧' + _t('info_panels.background.key'))])
-	                .placement('top')
-	            );
-
-	        panelLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                context.ui().info.toggle('background');
-	            });
+	  return operation.run('xor', geom, moreGeoms);
+	};
 
-	        panelLabelEnter
-	            .append('span')
-	            .text(_t('background.panel.description'));
-
-	        var locPanelLabelEnter = bgExtrasListEnter
-	            .append('li')
-	            .attr('class', 'location-panel-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('background.location_panel.tooltip'))
-	                .keys([uiCmd('⌘⇧' + _t('info_panels.location.key'))])
-	                .placement('top')
-	            );
-
-	        locPanelLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                context.ui().info.toggle('location');
-	            });
+	var difference = function difference(subjectGeom) {
+	  for (var _len4 = arguments.length, clippingGeoms = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
+	    clippingGeoms[_key4 - 1] = arguments[_key4];
+	  }
 
-	        locPanelLabelEnter
-	            .append('span')
-	            .text(_t('background.location_panel.description'));
+	  return operation.run('difference', subjectGeom, clippingGeoms);
+	};
 
+	var index$1 = {
+	  union: union$1,
+	  intersection: intersection$1$1,
+	  xor: xor,
+	  difference: difference
+	};
 
-	        // "Info / Report a Problem" link
-	        selection.selectAll('.imagery-faq')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'imagery-faq')
-	            .append('a')
-	            .attr('target', '_blank')
-	            .call(svgIcon('#iD-icon-out-link', 'inline'))
-	            .attr('href', 'https://github.com/openstreetmap/iD/blob/develop/FAQ.md#how-can-i-report-an-issue-with-background-imagery')
-	            .append('span')
-	            .text(_t('background.imagery_problem_faq'));
-
-	        _backgroundList
-	            .call(drawListItems, 'radio', chooseBackground, function(d) { return !d.isHidden() && !d.overlay; });
-	    }
-
-	    function setTooltips(selection) {
-	        selection.each(function(d, i, nodes) {
-	            var item = select(this).select('label');
-	            var span = item.select('span');
-	            var placement = (i < nodes.length / 2) ? 'bottom' : 'top';
-	            var description = d.description();
-	            var isOverflowing = (span.property('clientWidth') !== span.property('scrollWidth'));
-
-	            item.call(uiTooltip().destroyAny);
-
-	            if (d.id === previousBackgroundID()) {
-	                item.call(uiTooltip()
-	                    .placement(placement)
-	                    .title('<div>' + _t('background.switch') + '</div>')
-	                    .keys([uiCmd('⌘' + _t('background.key'))])
-	                );
-	            } else if (description || isOverflowing) {
-	                item.call(uiTooltip()
-	                    .placement(placement)
-	                    .title(description || d.name())
-	                );
-	            }
+	var geojsonPrecision = createCommonjsModule(function (module) {
+	  (function () {
+	    function parse(t, coordinatePrecision, extrasPrecision) {
+	      function point(p) {
+	        return p.map(function (e, index) {
+	          if (index < 2) {
+	            return 1 * e.toFixed(coordinatePrecision);
+	          } else {
+	            return 1 * e.toFixed(extrasPrecision);
+	          }
 	        });
-	    }
+	      }
+
+	      function multi(l) {
+	        return l.map(point);
+	      }
+
+	      function poly(p) {
+	        return p.map(multi);
+	      }
 
-	    function drawListItems(layerList, type, change, filter) {
-	        var sources = context.background()
-	            .sources(context.map().extent(), context.map().zoom(), true)
-	            .filter(filter);
+	      function multiPoly(m) {
+	        return m.map(poly);
+	      }
 
-	        var layerLinks = layerList.selectAll('li')
-	            .data(sources, function(d) { return d.name(); });
+	      function geometry(obj) {
+	        if (!obj) {
+	          return {};
+	        }
 
-	        layerLinks.exit()
-	            .remove();
+	        switch (obj.type) {
+	          case "Point":
+	            obj.coordinates = point(obj.coordinates);
+	            return obj;
 
-	        var enter = layerLinks.enter()
-	            .append('li')
-	            .classed('layer-custom', function(d) { return d.id === 'custom'; })
-	            .classed('best', function(d) { return d.best(); });
+	          case "LineString":
+	          case "MultiPoint":
+	            obj.coordinates = multi(obj.coordinates);
+	            return obj;
 
-	        var label = enter
-	            .append('label');
+	          case "Polygon":
+	          case "MultiLineString":
+	            obj.coordinates = poly(obj.coordinates);
+	            return obj;
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', 'layers')
-	            .on('change', change);
+	          case "MultiPolygon":
+	            obj.coordinates = multiPoly(obj.coordinates);
+	            return obj;
 
-	        label
-	            .append('span')
-	            .text(function(d) { return d.name(); });
+	          case "GeometryCollection":
+	            obj.geometries = obj.geometries.map(geometry);
+	            return obj;
 
-	        enter.filter(function(d) { return d.id === 'custom'; })
-	            .append('button')
-	            .attr('class', 'layer-browse')
-	            .call(uiTooltip()
-	                .title(_t('settings.custom_background.tooltip'))
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            )
-	            .on('click', editCustom)
-	            .call(svgIcon('#iD-icon-more'));
+	          default:
+	            return {};
+	        }
+	      }
 
-	        enter.filter(function(d) { return d.best(); })
-	            .append('div')
-	            .attr('class', 'best')
-	            .call(uiTooltip()
-	                .title(_t('background.best_imagery'))
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            )
-	            .append('span')
-	            .html('&#9733;');
+	      function feature(obj) {
+	        obj.geometry = geometry(obj.geometry);
+	        return obj;
+	      }
 
+	      function featureCollection(f) {
+	        f.features = f.features.map(feature);
+	        return f;
+	      }
 
-	        layerList.selectAll('li')
-	            .sort(sortSources);
+	      function geometryCollection(g) {
+	        g.geometries = g.geometries.map(geometry);
+	        return g;
+	      }
 
-	        layerList
-	            .call(updateLayerSelections);
+	      if (!t) {
+	        return t;
+	      }
 
+	      switch (t.type) {
+	        case "Feature":
+	          return feature(t);
 
-	        function sortSources(a, b) {
-	            return a.best() && !b.best() ? -1
-	                : b.best() && !a.best() ? 1
-	                : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
-	        }
-	    }
+	        case "GeometryCollection":
+	          return geometryCollection(t);
 
-	    function updateLayerSelections(selection) {
-	        function active(d) {
-	            return context.background().showsLayer(d);
-	        }
+	        case "FeatureCollection":
+	          return featureCollection(t);
 
-	        selection.selectAll('li')
-	            .classed('active', active)
-	            .classed('switch', function(d) { return d.id === previousBackgroundID(); })
-	            .call(setTooltips)
-	            .selectAll('input')
-	            .property('checked', active);
+	        case "Point":
+	        case "LineString":
+	        case "Polygon":
+	        case "MultiPoint":
+	        case "MultiPolygon":
+	        case "MultiLineString":
+	          return geometry(t);
+
+	        default:
+	          return t;
+	      }
 	    }
 
+	    module.exports = parse;
+	    module.exports.parse = parse;
+	  })();
+	});
 
-	    function chooseBackground(d) {
-	        if (d.id === 'custom' && !d.template()) {
-	            return editCustom();
-	        }
+	function isObject$4(obj) {
+	  return _typeof(obj) === 'object' && obj !== null;
+	}
 
-	        event.preventDefault();
-	        var previousBackground = context.background().baseLayerSource();
-	        corePreferences('background-last-used-toggle', previousBackground.id);
-	        corePreferences('background-last-used', d.id);
-	        context.background().baseLayerSource(d);
-	        document.activeElement.blur();
-	    }
+	function forEach(obj, cb) {
+	  if (Array.isArray(obj)) {
+	    obj.forEach(cb);
+	  } else if (isObject$4(obj)) {
+	    Object.keys(obj).forEach(function (key) {
+	      var val = obj[key];
+	      cb(val, key);
+	    });
+	  }
+	}
 
+	function getTreeDepth(obj) {
+	  var depth = 0;
 
-	    function customChanged(d) {
-	        if (d && d.template) {
-	            _customSource.template(d.template);
-	            chooseBackground(_customSource);
-	        } else {
-	            _customSource.template('');
-	            chooseBackground(context.background().findSource('none'));
+	  if (Array.isArray(obj) || isObject$4(obj)) {
+	    forEach(obj, function (val) {
+	      if (Array.isArray(val) || isObject$4(val)) {
+	        var tmpDepth = getTreeDepth(val);
+
+	        if (tmpDepth > depth) {
+	          depth = tmpDepth;
 	        }
+	      }
+	    });
+	    return depth + 1;
+	  }
+
+	  return depth;
+	}
+
+	function stringify(obj, options) {
+	  options = options || {};
+	  var indent = JSON.stringify([1], null, get$5(options, 'indent', 2)).slice(2, -3);
+	  var addMargin = get$5(options, 'margins', false);
+	  var addArrayMargin = get$5(options, 'arrayMargins', false);
+	  var addObjectMargin = get$5(options, 'objectMargins', false);
+	  var maxLength = indent === '' ? Infinity : get$5(options, 'maxLength', 80);
+	  var maxNesting = get$5(options, 'maxNesting', Infinity);
+	  return function _stringify(obj, currentIndent, reserved) {
+	    if (obj && typeof obj.toJSON === 'function') {
+	      obj = obj.toJSON();
 	    }
 
+	    var string = JSON.stringify(obj);
 
-	    function editCustom() {
-	        event.preventDefault();
-	        context.container()
-	            .call(_settingsCustomBackground);
+	    if (string === undefined) {
+	      return string;
 	    }
 
+	    var length = maxLength - currentIndent.length - reserved;
+	    var treeDepth = getTreeDepth(obj);
 
-	    context.background()
-	        .on('change.background_list', function() {
-	            _backgroundList.call(updateLayerSelections);
-	        });
+	    if (treeDepth <= maxNesting && string.length <= length) {
+	      var prettified = prettify(string, {
+	        addMargin: addMargin,
+	        addArrayMargin: addArrayMargin,
+	        addObjectMargin: addObjectMargin
+	      });
 
-	    context.map()
-	        .on('move.background_list',
-	            debounce(function() {
-	                // layers in-view may have changed due to map move
-	                window.requestIdleCallback(section.reRender);
-	            }, 1000)
-	        );
+	      if (prettified.length <= length) {
+	        return prettified;
+	      }
+	    }
 
-	    return section;
-	}
+	    if (isObject$4(obj)) {
+	      var nextIndent = currentIndent + indent;
+	      var items = [];
+	      var delimiters;
 
-	function uiSectionBackgroundOffset(context) {
+	      var comma = function comma(array, index) {
+	        return index === array.length - 1 ? 0 : 1;
+	      };
 
-	    var section = uiSection('background-offset', context)
-	        .title(_t('background.fix_misalignment'))
-	        .disclosureContent(renderDisclosureContent)
-	        .expandedByDefault(false);
+	      if (Array.isArray(obj)) {
+	        for (var index = 0; index < obj.length; index++) {
+	          items.push(_stringify(obj[index], nextIndent, comma(obj, index)) || 'null');
+	        }
 
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	        delimiters = '[]';
+	      } else {
+	        Object.keys(obj).forEach(function (key, index, array) {
+	          var keyPart = JSON.stringify(key) + ': ';
 
-	    var _directions = [
-	        ['right', [0.5, 0]],
-	        ['top', [0, -0.5]],
-	        ['left', [-0.5, 0]],
-	        ['bottom', [0, 0.5]]
-	    ];
+	          var value = _stringify(obj[key], nextIndent, keyPart.length + comma(array, index));
 
+	          if (value !== undefined) {
+	            items.push(keyPart + value);
+	          }
+	        });
+	        delimiters = '{}';
+	      }
 
-	    function cancelEvent() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	      if (items.length > 0) {
+	        return [delimiters[0], indent + items.join(',\n' + nextIndent), delimiters[1]].join('\n' + currentIndent);
+	      }
 	    }
 
+	    return string;
+	  }(obj, '', 0);
+	} // Note: This regex matches even invalid JSON strings, but since we’re
+	// working on the output of `JSON.stringify` we know that only valid strings
+	// are present (unless the user supplied a weird `options.indent` but in
+	// that case we don’t care since the output would be invalid anyway).
 
-	    function updateValue() {
-	        var meters = geoOffsetToMeters(context.background().offset());
-	        var x = +meters[0].toFixed(2);
-	        var y = +meters[1].toFixed(2);
 
-	        context.container().selectAll('.nudge-inner-rect')
-	            .select('input')
-	            .classed('error', false)
-	            .property('value', x + ', ' + y);
+	var stringOrChar = /("(?:[^\\"]|\\.)*")|[:,\][}{]/g;
 
-	        context.container().selectAll('.nudge-reset')
-	            .classed('disabled', function() {
-	                return (x === 0 && y === 0);
-	            });
-	    }
+	function prettify(string, options) {
+	  options = options || {};
+	  var tokens = {
+	    '{': '{',
+	    '}': '}',
+	    '[': '[',
+	    ']': ']',
+	    ',': ', ',
+	    ':': ': '
+	  };
 
+	  if (options.addMargin || options.addObjectMargin) {
+	    tokens['{'] = '{ ';
+	    tokens['}'] = ' }';
+	  }
 
-	    function resetOffset() {
-	        context.background().offset([0, 0]);
-	        updateValue();
-	    }
+	  if (options.addMargin || options.addArrayMargin) {
+	    tokens['['] = '[ ';
+	    tokens[']'] = ' ]';
+	  }
 
+	  return string.replace(stringOrChar, function (match, string) {
+	    return string ? match : tokens[match];
+	  });
+	}
 
-	    function nudge(d) {
-	        context.background().nudge(d, context.map().zoom());
-	        updateValue();
-	    }
+	function get$5(options, name, defaultValue) {
+	  return name in options ? options[name] : defaultValue;
+	}
 
+	var jsonStringifyPrettyCompact = stringify;
 
-	    function pointerdownNudgeButton(d) {
-	        var interval;
-	        var timeout = window.setTimeout(function() {
-	                interval = window.setInterval(nudge.bind(null, d), 100);
-	            }, 500);
+	var _default$3 = /*#__PURE__*/function () {
+	  // constructor
+	  //
+	  // `fc`  Optional FeatureCollection of known features
+	  //
+	  // Optionally pass a GeoJSON FeatureCollection of known features which we can refer to later.
+	  // Each feature must have a filename-like `id`, for example: `something.geojson`
+	  //
+	  // {
+	  //   "type": "FeatureCollection"
+	  //   "features": [
+	  //     {
+	  //       "type": "Feature",
+	  //       "id": "philly_metro.geojson",
+	  //       "properties": { … },
+	  //       "geometry": { … }
+	  //     }
+	  //   ]
+	  // }
+	  function _default(fc) {
+	    var _this = this;
 
-	        function doneNudge() {
-	            window.clearTimeout(timeout);
-	            window.clearInterval(interval);
-	            select(window)
-	                .on(_pointerPrefix + 'up.buttonoffset', null, true)
-	                .on(_pointerPrefix + 'down.buttonoffset', null, true);
-	        }
+	    _classCallCheck(this, _default);
 
-	        select(window)
-	            .on(_pointerPrefix + 'up.buttonoffset', doneNudge, true)
-	            .on(_pointerPrefix + 'down.buttonoffset', doneNudge, true);
+	    // The _cache retains resolved features, so if you ask for the same thing multiple times
+	    // we don't repeat the expensive resolving/clipping operations.
+	    //
+	    // Each feature has a stable identifier that is used as the cache key.
+	    // The identifiers look like:
+	    // - for point locations, the stringified point:          e.g. '[8.67039,49.41882]'
+	    // - for geojson locations, the geojson id:               e.g. 'de-hamburg.geojson'
+	    // - for countrycoder locations, feature.id property:     e.g. 'Q2'  (countrycoder uses Wikidata identifiers)
+	    // - for aggregated locationSets, +[include]-[exclude]:   e.g '+[Q2]-[Q18,Q27611]'
+	    this._cache = {}; // When strict mode = true, throw on invalid locations or locationSets.
+	    // When strict mode = false, return `null` for invalid locations or locationSets.
 
-	        nudge(d);
-	    }
+	    this._strict = true; // process input FeatureCollection
 
+	    if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
+	      fc.features.forEach(function (feature) {
+	        feature.properties = feature.properties || {};
+	        var props = feature.properties; // get `id` from either `id` or `properties`
 
-	    function inputOffset() {
-	        var input = select(this);
-	        var d = input.node().value;
+	        var id = feature.id || props.id;
+	        if (!id || !/^\S+\.geojson$/i.test(id)) return; // ensure `id` exists and is lowercase
 
-	        if (d === '') { return resetOffset(); }
+	        id = id.toLowerCase();
+	        feature.id = id;
+	        props.id = id; // ensure `area` property exists
 
-	        d = d.replace(/;/g, ',').split(',').map(function(n) {
-	            // if n is NaN, it will always get mapped to false.
-	            return !isNaN(n) && n;
-	        });
+	        if (!props.area) {
+	          var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
 
-	        if (d.length !== 2 || !d[0] || !d[1]) {
-	            input.classed('error', true);
-	            return;
+	          props.area = Number(area.toFixed(2));
 	        }
 
-	        context.background().offset(geoMetersToOffset(d));
-	        updateValue();
-	    }
-
+	        _this._cache[id] = feature;
+	      });
+	    } // Replace CountryCoder world geometry to be a polygon covering the world.
 
-	    function dragOffset() {
-	        if (event.button !== 0) { return; }
 
-	        var origin = [event.clientX, event.clientY];
+	    var world = _cloneDeep(feature('Q2'));
 
-	        var pointerId = event.pointerId || 'mouse';
+	    world.geometry = {
+	      type: 'Polygon',
+	      coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]
+	    };
+	    world.id = 'Q2';
+	    world.properties.id = 'Q2';
+	    world.properties.area = geojsonArea.geometry(world.geometry) / 1e6; // m² to km²
 
-	        context.container()
-	            .append('div')
-	            .attr('class', 'nudge-surface');
+	    this._cache.Q2 = world;
+	  } // validateLocation
+	  // `location`  The location to validate
+	  //
+	  // Pass a `location` value to validate
+	  //
+	  // Returns a result like:
+	  //   {
+	  //     type:     'point', 'geojson', or 'countrycoder'
+	  //     location:  the queried location
+	  //     id:        the stable identifier for the feature
+	  //   }
+	  // or `null` if the location is invalid
+	  //
 
-	        select(window)
-	            .on(_pointerPrefix + 'move.drag-bg-offset', pointermove)
-	            .on(_pointerPrefix + 'up.drag-bg-offset', pointerup);
 
-	        if (_pointerPrefix === 'pointer') {
-	            select(window)
-	                .on('pointercancel.drag-bg-offset', pointerup);
+	  _createClass(_default, [{
+	    key: "validateLocation",
+	    value: function validateLocation(location) {
+	      if (Array.isArray(location)) {
+	        // a [lon,lat] coordinate pair?
+	        if (location.length === 2 && Number.isFinite(location[0]) && Number.isFinite(location[1]) && location[0] >= -180 && location[0] <= 180 && location[1] >= -90 && location[1] <= 90) {
+	          var id = '[' + location.toString() + ']';
+	          return {
+	            type: 'point',
+	            location: location,
+	            id: id
+	          };
 	        }
+	      } else if (typeof location === 'string' && /^\S+\.geojson$/i.test(location)) {
+	        // a .geojson filename?
+	        var _id = location.toLowerCase();
 
-	        function pointermove() {
-	            if (pointerId !== (event.pointerId || 'mouse')) { return; }
-
-	            var latest = [event.clientX, event.clientY];
-	            var d = [
-	                -(origin[0] - latest[0]) / 4,
-	                -(origin[1] - latest[1]) / 4
-	            ];
-
-	            origin = latest;
-	            nudge(d);
+	        if (this._cache[_id]) {
+	          return {
+	            type: 'geojson',
+	            location: location,
+	            id: _id
+	          };
 	        }
+	      } else if (typeof location === 'string' || typeof location === 'number') {
+	        // a country-coder value?
+	        var feature$1 = feature(location);
 
-	        function pointerup() {
-	            if (pointerId !== (event.pointerId || 'mouse')) { return; }
-	            if (event.button !== 0) { return; }
+	        if (feature$1) {
+	          // Use wikidata QID as the identifier, since that seems to be the one
+	          // property that everything in CountryCoder is guaranteed to have.
+	          var _id2 = feature$1.properties.wikidata;
+	          return {
+	            type: 'countrycoder',
+	            location: location,
+	            id: _id2
+	          };
+	        }
+	      }
 
-	            context.container().selectAll('.nudge-surface')
-	                .remove();
+	      if (this._strict) {
+	        throw new Error("validateLocation:  Invalid location: \"".concat(location, "\"."));
+	      } else {
+	        return null;
+	      }
+	    } // resolveLocation
+	    // `location`  The location to resolve
+	    //
+	    // Pass a `location` value to resolve
+	    //
+	    // Returns a result like:
+	    //   {
+	    //     type:      'point', 'geojson', or 'countrycoder'
+	    //     location:  the queried location
+	    //     id:        a stable identifier for the feature
+	    //     feature:   the resolved GeoJSON feature
+	    //   }
+	    //  or `null` if the location is invalid
+	    //
 
-	            select(window)
-	                .on('.drag-bg-offset', null);
-	        }
-	    }
+	  }, {
+	    key: "resolveLocation",
+	    value: function resolveLocation(location) {
+	      var valid = this.validateLocation(location);
+	      if (!valid) return null;
+	      var id = valid.id; // return a result from cache if we can
+
+	      if (this._cache[id]) {
+	        return Object.assign(valid, {
+	          feature: this._cache[id]
+	        });
+	      } // a [lon,lat] coordinate pair?
 
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.nudge-container')
-	            .data([0]);
+	      if (valid.type === 'point') {
+	        var RADIUS = 25000; // meters
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'nudge-container cf');
+	        var EDGES = 10;
+	        var PRECISION = 3;
+	        var area = Math.PI * RADIUS * RADIUS / 1e6; // m² to km²
 
-	        containerEnter
-	            .append('div')
-	            .attr('class', 'nudge-instructions')
-	            .text(_t('background.offset'));
+	        var feature$1 = this._cache[id] = geojsonPrecision({
+	          type: 'Feature',
+	          id: id,
+	          properties: {
+	            id: id,
+	            area: Number(area.toFixed(2))
+	          },
+	          geometry: circleToPolygon(location, RADIUS, EDGES)
+	        }, PRECISION);
+	        return Object.assign(valid, {
+	          feature: feature$1
+	        }); // a .geojson filename?
+	      } else if (valid.type === 'geojson') ; else if (valid.type === 'countrycoder') {
+	        var _feature = _cloneDeep(feature(id));
+
+	        var props = _feature.properties; // -> This block of code is weird and requires some explanation. <-
+	        // CountryCoder includes higher level features which are made up of members.
+	        // These features don't have their own geometry, but CountryCoder provides an
+	        //   `aggregateFeature` method to combine these members into a MultiPolygon.
+	        // BUT, when we try to actually work with these aggregated MultiPolygons,
+	        //   Turf/JSTS gets crashy because of topography bugs.
+	        // SO, we'll aggregate the features ourselves by unioning them together.
+	        // This approach also has the benefit of removing all the internal boaders and
+	        //   simplifying the regional polygons a lot.
+
+	        if (Array.isArray(props.members)) {
+	          var seed = _feature.geometry ? _feature : null;
+	          var aggregate = props.members.reduce(_locationReducer.bind(this), seed);
+	          _feature.geometry = aggregate.geometry;
+	        } // ensure `area` property exists
+
+
+	        if (!props.area) {
+	          var _area = geojsonArea.geometry(_feature.geometry) / 1e6; // m² to km²
+
+
+	          props.area = Number(_area.toFixed(2));
+	        } // ensure `id` property exists
+
+
+	        _feature.id = id;
+	        props.id = id;
+	        this._cache[id] = _feature;
+	        return Object.assign(valid, {
+	          feature: _feature
+	        });
+	      }
 
-	        var nudgeEnter = containerEnter
-	            .append('div')
-	            .attr('class', 'nudge-outer-rect')
-	            .on(_pointerPrefix + 'down', dragOffset);
+	      if (this._strict) {
+	        throw new Error("resolveLocation:  Couldn't resolve location \"".concat(location, "\"."));
+	      } else {
+	        return null;
+	      }
+	    } // validateLocationSet
+	    // `locationSet`  the locationSet to validate
+	    //
+	    // Pass a locationSet Object to validate like:
+	    //   {
+	    //     include: [ Array of locations ],
+	    //     exclude: [ Array of locations ]
+	    //   }
+	    //
+	    // Returns a result like:
+	    //   {
+	    //     type:         'locationset'
+	    //     locationSet:  the queried locationSet
+	    //     id:           the stable identifier for the feature
+	    //   }
+	    // or `null` if the locationSet is invalid
+	    //
 
-	        nudgeEnter
-	            .append('div')
-	            .attr('class', 'nudge-inner-rect')
-	            .append('input')
-	            .on('change', inputOffset);
+	  }, {
+	    key: "validateLocationSet",
+	    value: function validateLocationSet(locationSet) {
+	      locationSet = locationSet || {};
+	      var validator = this.validateLocation.bind(this);
+	      var include = (locationSet.include || []).map(validator).filter(Boolean);
+	      var exclude = (locationSet.exclude || []).map(validator).filter(Boolean);
+
+	      if (!include.length) {
+	        if (this._strict) {
+	          throw new Error("validateLocationSet:  LocationSet includes nothing.");
+	        } else {
+	          // non-strict mode, replace an empty locationSet with one that includes "the world"
+	          locationSet.include = ['Q2'];
+	          include = [{
+	            type: 'countrycoder',
+	            location: 'Q2',
+	            id: 'Q2'
+	          }];
+	        }
+	      } // generate stable identifier
+
+
+	      include.sort(_sortLocations);
+	      var id = '+[' + include.map(function (d) {
+	        return d.id;
+	      }).join(',') + ']';
+
+	      if (exclude.length) {
+	        exclude.sort(_sortLocations);
+	        id += '-[' + exclude.map(function (d) {
+	          return d.id;
+	        }).join(',') + ']';
+	      }
 
-	        containerEnter
-	            .append('div')
-	            .selectAll('button')
-	            .data(_directions).enter()
-	            .append('button')
-	            .attr('class', function(d) { return d[0] + ' nudge'; })
-	            .on('contextmenu', cancelEvent)
-	            .on(_pointerPrefix + 'down', function(d) {
-	                if (event.button !== 0) { return; }
-	                pointerdownNudgeButton(d[1]);
-	            });
+	      return {
+	        type: 'locationset',
+	        locationSet: locationSet,
+	        id: id
+	      };
+	    } // resolveLocationSet
+	    // `locationSet`  the locationSet to resolve
+	    //
+	    // Pass a locationSet Object to validate like:
+	    //   {
+	    //     include: [ Array of locations ],
+	    //     exclude: [ Array of locations ]
+	    //   }
+	    //
+	    // Returns a result like:
+	    //   {
+	    //     type:         'locationset'
+	    //     locationSet:  the queried locationSet
+	    //     id:           the stable identifier for the feature
+	    //     feature:      the resolved GeoJSON feature
+	    //   }
+	    // or `null` if the locationSet is invalid
+	    //
 
-	        containerEnter
-	            .append('button')
-	            .attr('title', _t('background.reset'))
-	            .attr('class', 'nudge-reset disabled')
-	            .on('contextmenu', cancelEvent)
-	            .on('click', function() {
-	                event.preventDefault();
-	                if (event.button !== 0) { return; }
-	                resetOffset();
-	            })
-	            .call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
+	  }, {
+	    key: "resolveLocationSet",
+	    value: function resolveLocationSet(locationSet) {
+	      locationSet = locationSet || {};
+	      var valid = this.validateLocationSet(locationSet);
+	      if (!valid) return null;
+	      var id = valid.id; // return a result from cache if we can
+
+	      if (this._cache[id]) {
+	        return Object.assign(valid, {
+	          feature: this._cache[id]
+	        });
+	      }
 
-	        updateValue();
-	    }
+	      var resolver = this.resolveLocation.bind(this);
+	      var include = (locationSet.include || []).map(resolver).filter(Boolean);
+	      var exclude = (locationSet.exclude || []).map(resolver).filter(Boolean); // return quickly if it's a single included location..
 
-	    context.background()
-	        .on('change.backgroundOffset-update', updateValue);
+	      if (include.length === 1 && exclude.length === 0) {
+	        return Object.assign(valid, {
+	          feature: include[0].feature
+	        });
+	      } // calculate unions
 
-	    return section;
-	}
 
-	function uiSectionOverlayList(context) {
+	      var includeGeoJSON = include.map(function (d) {
+	        return d.location;
+	      }).reduce(_locationReducer.bind(this), null);
+	      var excludeGeoJSON = exclude.map(function (d) {
+	        return d.location;
+	      }).reduce(_locationReducer.bind(this), null); // calculate difference, update `area` and return result
 
-	    var section = uiSection('overlay-list', context)
-	        .title(_t('background.overlays'))
-	        .disclosureContent(renderDisclosureContent);
+	      var resultGeoJSON = excludeGeoJSON ? _clip(includeGeoJSON, excludeGeoJSON, 'DIFFERENCE') : includeGeoJSON;
+	      var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6; // m² to km²
 
-	    var _overlayList = select(null);
+	      resultGeoJSON.id = id;
+	      resultGeoJSON.properties = {
+	        id: id,
+	        area: Number(area.toFixed(2))
+	      };
+	      this._cache[id] = resultGeoJSON;
+	      return Object.assign(valid, {
+	        feature: resultGeoJSON
+	      });
+	    } // strict
+	    //
 
-	    function setTooltips(selection) {
-	        selection.each(function(d, i, nodes) {
-	            var item = select(this).select('label');
-	            var span = item.select('span');
-	            var placement = (i < nodes.length / 2) ? 'bottom' : 'top';
-	            var description = d.description();
-	            var isOverflowing = (span.property('clientWidth') !== span.property('scrollWidth'));
+	  }, {
+	    key: "strict",
+	    value: function strict(val) {
+	      if (val === undefined) {
+	        // get
+	        return this._strict;
+	      } else {
+	        // set
+	        this._strict = val;
+	        return this;
+	      }
+	    } // cache
+	    // convenience method to access the internal cache
 
-	            item.call(uiTooltip().destroyAny);
+	  }, {
+	    key: "cache",
+	    value: function cache() {
+	      return this._cache;
+	    } // stringify
+	    // convenience method to prettyStringify the given object
 
-	            if (description || isOverflowing) {
-	                item.call(uiTooltip()
-	                    .placement(placement)
-	                    .title(description || d.name())
-	                );
-	            }
-	        });
+	  }, {
+	    key: "stringify",
+	    value: function stringify(obj, options) {
+	      return jsonStringifyPrettyCompact(obj, options);
 	    }
+	  }]);
 
-	    function updateLayerSelections(selection) {
-	        function active(d) {
-	            return context.background().showsLayer(d);
-	        }
+	  return _default;
+	}(); // Wrap the mfogel/polygon-clipping library and return a GeoJSON feature.
 
-	        selection.selectAll('li')
-	            .classed('active', active)
-	            .call(setTooltips)
-	            .selectAll('input')
-	            .property('checked', active);
+	function _clip(a, b, which) {
+	  var fn = {
+	    UNION: index$1.union,
+	    DIFFERENCE: index$1.difference
+	  }[which];
+	  var coords = fn(a.geometry.coordinates, b.geometry.coordinates);
+	  return {
+	    type: 'Feature',
+	    properties: {},
+	    geometry: {
+	      type: whichType(coords),
+	      coordinates: coords
 	    }
+	  }; // is this a Polygon or a MultiPolygon?
 
+	  function whichType(coords) {
+	    var a = Array.isArray(coords);
+	    var b = a && Array.isArray(coords[0]);
+	    var c = b && Array.isArray(coords[0][0]);
+	    var d = c && Array.isArray(coords[0][0][0]);
+	    return d ? 'MultiPolygon' : 'Polygon';
+	  }
+	} // Reduce an array of locations into a single GeoJSON feature
+
+
+	function _locationReducer(accumulator, location) {
+	  /* eslint-disable no-console, no-invalid-this */
+	  var result;
+
+	  try {
+	    var resolved = this.resolveLocation(location);
 
-	    function chooseOverlay(d) {
-	        event.preventDefault();
-	        context.background().toggleOverlayLayer(d);
-	        _overlayList.call(updateLayerSelections);
-	        document.activeElement.blur();
+	    if (!resolved || !resolved.feature) {
+	      console.warn("Warning:  Couldn't resolve location \"".concat(location, "\""));
+	      return accumulator;
 	    }
 
-	    function drawListItems(layerList, type, change, filter) {
-	        var sources = context.background()
-	            .sources(context.map().extent(), context.map().zoom(), true)
-	            .filter(filter);
+	    result = !accumulator ? resolved.feature : _clip(accumulator, resolved.feature, 'UNION');
+	  } catch (e) {
+	    console.warn("Warning:  Error resolving location \"".concat(location, "\""));
+	    console.warn(e);
+	    result = accumulator;
+	  }
 
-	        var layerLinks = layerList.selectAll('li')
-	            .data(sources, function(d) { return d.name(); });
+	  return result;
+	  /* eslint-enable no-console, no-invalid-this */
+	}
 
-	        layerLinks.exit()
-	            .remove();
+	function _cloneDeep(obj) {
+	  return JSON.parse(JSON.stringify(obj));
+	} // Sorting the location lists is ok because they end up unioned together.
+	// This sorting makes it possible to generate a deterministic id.
 
-	        var enter = layerLinks.enter()
-	            .append('li');
 
-	        var label = enter
-	            .append('label');
+	function _sortLocations(a, b) {
+	  var rank = {
+	    countrycoder: 1,
+	    geojson: 2,
+	    point: 3
+	  };
+	  var aRank = rank[a.type];
+	  var bRank = rank[b.type];
+	  return aRank > bRank ? 1 : aRank < bRank ? -1 : a.id.localeCompare(b.id);
+	}
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', 'layers')
-	            .on('change', change);
+	var _oci = null;
+	function uiSuccess(context) {
+	  var MAXEVENTS = 2;
+	  var dispatch$1 = dispatch('cancel');
 
-	        label
-	            .append('span')
-	            .text(function(d) { return d.name(); });
+	  var _changeset;
 
+	  var _location;
 
-	        layerList.selectAll('li')
-	            .sort(sortSources);
+	  ensureOSMCommunityIndex(); // start fetching the data
 
-	        layerList
-	            .call(updateLayerSelections);
+	  function ensureOSMCommunityIndex() {
+	    var data = _mainFileFetcher;
+	    return Promise.all([data.get('oci_resources'), data.get('oci_features')]).then(function (vals) {
+	      if (_oci) return _oci;
+	      var ociResources = vals[0].resources;
+	      var loco = new _default$3(vals[1]);
+	      var ociFeatures = {};
+	      Object.values(ociResources).forEach(function (resource) {
+	        var feature = loco.resolveLocationSet(resource.locationSet).feature;
+	        var ociFeature = ociFeatures[feature.id];
 
+	        if (!ociFeature) {
+	          ociFeature = JSON.parse(JSON.stringify(feature)); // deep clone
 
-	        function sortSources(a, b) {
-	            return a.best() && !b.best() ? -1
-	                : b.best() && !a.best() ? 1
-	                : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
+	          ociFeature.properties.resourceIDs = new Set();
+	          ociFeatures[feature.id] = ociFeature;
 	        }
+
+	        ociFeature.properties.resourceIDs.add(resource.id);
+	      });
+	      return _oci = {
+	        features: ociFeatures,
+	        resources: ociResources,
+	        query: whichPolygon_1({
+	          type: 'FeatureCollection',
+	          features: Object.values(ociFeatures)
+	        })
+	      };
+	    });
+	  } // string-to-date parsing in JavaScript is weird
+
+
+	  function parseEventDate(when) {
+	    if (!when) return;
+	    var raw = when.trim();
+	    if (!raw) return;
+
+	    if (!/Z$/.test(raw)) {
+	      // if no trailing 'Z', add one
+	      raw += 'Z'; // this forces date to be parsed as a UTC date
 	    }
 
-	    function renderDisclosureContent(selection) {
+	    var parsed = new Date(raw);
+	    return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
+	  }
+
+	  function success(selection) {
+	    var header = selection.append('div').attr('class', 'header fillL');
+	    header.append('h3').html(_t.html('success.just_edited'));
+	    header.append('button').attr('class', 'close').on('click', function () {
+	      return dispatch$1.call('cancel');
+	    }).call(svgIcon('#iD-icon-close'));
+	    var body = selection.append('div').attr('class', 'body save-success fillL');
+	    var summary = body.append('div').attr('class', 'save-summary');
+	    summary.append('h3').html(_t.html('success.thank_you' + (_location ? '_location' : ''), {
+	      where: _location
+	    }));
+	    summary.append('p').html(_t.html('success.help_html')).append('a').attr('class', 'link-out').attr('target', '_blank').attr('href', _t('success.help_link_url')).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('success.help_link_text'));
+	    var osm = context.connection();
+	    if (!osm) return;
+	    var changesetURL = osm.changesetURL(_changeset.id);
+	    var table = summary.append('table').attr('class', 'summary-table');
+	    var row = table.append('tr').attr('class', 'summary-row');
+	    row.append('td').attr('class', 'cell-icon summary-icon').append('a').attr('target', '_blank').attr('href', changesetURL).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', '#iD-logo-osm');
+	    var summaryDetail = row.append('td').attr('class', 'cell-detail summary-detail');
+	    summaryDetail.append('a').attr('class', 'cell-detail summary-view-on-osm').attr('target', '_blank').attr('href', changesetURL).html(_t.html('success.view_on_osm'));
+	    summaryDetail.append('div').html(_t.html('success.changeset_id', {
+	      changeset_id: "<a href=\"".concat(changesetURL, "\" target=\"_blank\">").concat(_changeset.id, "</a>")
+	    })); // Get OSM community index features intersecting the map..
+
+	    ensureOSMCommunityIndex().then(function (oci) {
+	      var communities = [];
+	      var properties = oci.query(context.map().center(), true) || []; // Gather the communities from the result
+
+	      properties.forEach(function (props) {
+	        var resourceIDs = Array.from(props.resourceIDs);
+	        resourceIDs.forEach(function (resourceID) {
+	          var resource = oci.resources[resourceID];
+	          communities.push({
+	            area: props.area || Infinity,
+	            order: resource.order || 0,
+	            resource: resource
+	          });
+	        });
+	      }); // sort communities by feature area ascending, community order descending
+
+	      communities.sort(function (a, b) {
+	        return a.area - b.area || b.order - a.order;
+	      });
+	      body.call(showCommunityLinks, communities.map(function (c) {
+	        return c.resource;
+	      }));
+	    });
+	  }
 
-	        var container = selection.selectAll('.layer-overlay-list')
-	            .data([0]);
+	  function showCommunityLinks(selection, resources) {
+	    var communityLinks = selection.append('div').attr('class', 'save-communityLinks');
+	    communityLinks.append('h3').html(_t.html('success.like_osm'));
+	    var table = communityLinks.append('table').attr('class', 'community-table');
+	    var row = table.selectAll('.community-row').data(resources);
+	    var rowEnter = row.enter().append('tr').attr('class', 'community-row');
+	    rowEnter.append('td').attr('class', 'cell-icon community-icon').append('a').attr('target', '_blank').attr('href', function (d) {
+	      return d.url;
+	    }).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', function (d) {
+	      return "#community-".concat(d.type);
+	    });
+	    var communityDetail = rowEnter.append('td').attr('class', 'cell-detail community-detail');
+	    communityDetail.each(showCommunityDetails);
+	    communityLinks.append('div').attr('class', 'community-missing').html(_t.html('success.missing')).append('a').attr('class', 'link-out').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmlab/osm-community-index/issues').append('span').html(_t.html('success.tell_us'));
+	  }
 
-	        _overlayList = container.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-overlay-list')
-	            .attr('dir', 'auto')
-	            .merge(container);
+	  function showCommunityDetails(d) {
+	    var selection = select(this);
+	    var communityID = d.id;
+	    var replacements = {
+	      url: linkify(d.url),
+	      signupUrl: linkify(d.signupUrl || d.url)
+	    };
+	    selection.append('div').attr('class', 'community-name').append('a').attr('target', '_blank').attr('href', d.url).html(_t.html("community.".concat(d.id, ".name")));
+	    var descriptionHTML = _t.html("community.".concat(d.id, ".description"), replacements);
 
-	        _overlayList
-	            .call(drawListItems, 'checkbox', chooseOverlay, function(d) { return !d.isHidden() && d.overlay; });
+	    if (d.type === 'reddit') {
+	      // linkify subreddits  #4997
+	      descriptionHTML = descriptionHTML.replace(/(\/r\/\w*\/*)/i, function (match) {
+	        return linkify(d.url, match);
+	      });
 	    }
 
-	    context.map()
-	        .on('move.overlay_list',
-	            debounce(function() {
-	                // layers in-view may have changed due to map move
-	                window.requestIdleCallback(section.reRender);
-	            }, 1000)
-	        );
+	    selection.append('div').attr('class', 'community-description').html(descriptionHTML);
 
-	    return section;
-	}
+	    if (d.extendedDescription || d.languageCodes && d.languageCodes.length) {
+	      selection.append('div').call(uiDisclosure(context, "community-more-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.more')).content(showMore));
+	    }
 
-	function uiPaneBackground(context) {
+	    var nextEvents = (d.events || []).map(function (event) {
+	      event.date = parseEventDate(event.when);
+	      return event;
+	    }).filter(function (event) {
+	      // date is valid and future (or today)
+	      var t = event.date.getTime();
+	      var now = new Date().setHours(0, 0, 0, 0);
+	      return !isNaN(t) && t >= now;
+	    }).sort(function (a, b) {
+	      // sort by date ascending
+	      return a.date < b.date ? -1 : a.date > b.date ? 1 : 0;
+	    }).slice(0, MAXEVENTS); // limit number of events shown
 
-	    var backgroundPane = uiPane('background', context)
-	        .key(_t('background.key'))
-	        .title(_t('background.title'))
-	        .description(_t('background.description'))
-	        .iconName('iD-icon-layers')
-	        .sections([
-	            uiSectionBackgroundList(context),
-	            uiSectionOverlayList(context),
-	            uiSectionBackgroundDisplayOptions(context),
-	            uiSectionBackgroundOffset(context)
-	        ]);
+	    if (nextEvents.length) {
+	      selection.append('div').call(uiDisclosure(context, "community-events-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.events')).content(showNextEvents)).select('.hide-toggle').append('span').attr('class', 'badge-text').html(nextEvents.length);
+	    }
 
-	    return backgroundPane;
-	}
+	    function showMore(selection) {
+	      var more = selection.selectAll('.community-more').data([0]);
+	      var moreEnter = more.enter().append('div').attr('class', 'community-more');
 
-	function uiPaneHelp(context) {
+	      if (d.extendedDescription) {
+	        moreEnter.append('div').attr('class', 'community-extended-description').html(_t.html("community.".concat(d.id, ".extendedDescription"), replacements));
+	      }
 
-	    var docKeys = [
-	        ['help', [
-	            'welcome',
-	            'open_data_h',
-	            'open_data',
-	            'before_start_h',
-	            'before_start',
-	            'open_source_h',
-	            'open_source',
-	            'open_source_help'
-	        ]],
-	        ['overview', [
-	            'navigation_h',
-	            'navigation_drag',
-	            'navigation_zoom',
-	            'features_h',
-	            'features',
-	            'nodes_ways'
-	        ]],
-	        ['editing', [
-	            'select_h',
-	            'select_left_click',
-	            'select_right_click',
-	            'select_space',
-	            'multiselect_h',
-	            'multiselect',
-	            'multiselect_shift_click',
-	            'multiselect_lasso',
-	            'undo_redo_h',
-	            'undo_redo',
-	            'save_h',
-	            'save',
-	            'save_validation',
-	            'upload_h',
-	            'upload',
-	            'backups_h',
-	            'backups',
-	            'keyboard_h',
-	            'keyboard'
-	        ]],
-	        ['feature_editor', [
-	            'intro',
-	            'definitions',
-	            'type_h',
-	            'type',
-	            'type_picker',
-	            'fields_h',
-	            'fields_all_fields',
-	            'fields_example',
-	            'fields_add_field',
-	            'tags_h',
-	            'tags_all_tags',
-	            'tags_resources'
-	        ]],
-	        ['points', [
-	            'intro',
-	            'add_point_h',
-	            'add_point',
-	            'add_point_finish',
-	            'move_point_h',
-	            'move_point',
-	            'delete_point_h',
-	            'delete_point',
-	            'delete_point_command'
-	        ]],
-	        ['lines', [
-	            'intro',
-	            'add_line_h',
-	            'add_line',
-	            'add_line_draw',
-	            'add_line_continue',
-	            'add_line_finish',
-	            'modify_line_h',
-	            'modify_line_dragnode',
-	            'modify_line_addnode',
-	            'connect_line_h',
-	            'connect_line',
-	            'connect_line_display',
-	            'connect_line_drag',
-	            'connect_line_tag',
-	            'disconnect_line_h',
-	            'disconnect_line_command',
-	            'move_line_h',
-	            'move_line_command',
-	            'move_line_connected',
-	            'delete_line_h',
-	            'delete_line',
-	            'delete_line_command'
-	        ]],
-	        ['areas', [
-	            'intro',
-	            'point_or_area_h',
-	            'point_or_area',
-	            'add_area_h',
-	            'add_area_command',
-	            'add_area_draw',
-	            'add_area_continue',
-	            'add_area_finish',
-	            'square_area_h',
-	            'square_area_command',
-	            'modify_area_h',
-	            'modify_area_dragnode',
-	            'modify_area_addnode',
-	            'delete_area_h',
-	            'delete_area',
-	            'delete_area_command'
-	        ]],
-	        ['relations', [
-	            'intro',
-	            'edit_relation_h',
-	            'edit_relation',
-	            'edit_relation_add',
-	            'edit_relation_delete',
-	            'maintain_relation_h',
-	            'maintain_relation',
-	            'relation_types_h',
-	            'multipolygon_h',
-	            'multipolygon',
-	            'multipolygon_create',
-	            'multipolygon_merge',
-	            'turn_restriction_h',
-	            'turn_restriction',
-	            'turn_restriction_field',
-	            'turn_restriction_editing',
-	            'route_h',
-	            'route',
-	            'route_add',
-	            'boundary_h',
-	            'boundary',
-	            'boundary_add'
-	        ]],
-	        ['notes', [
-	            'intro',
-	            'add_note_h',
-	            'add_note',
-	            'place_note',
-	            'move_note',
-	            'update_note_h',
-	            'update_note',
-	            'save_note_h',
-	            'save_note'
-	        ]],
-	        ['imagery', [
-	            'intro',
-	            'sources_h',
-	            'choosing',
-	            'sources',
-	            'offsets_h',
-	            'offset',
-	            'offset_change'
-	        ]],
-	        ['streetlevel', [
-	            'intro',
-	            'using_h',
-	            'using',
-	            'photos',
-	            'viewer'
-	        ]],
-	        ['gps', [
-	            'intro',
-	            'survey',
-	            'using_h',
-	            'using',
-	            'tracing',
-	            'upload'
-	        ]],
-	        ['qa', [
-	            'intro',
-	            'tools_h',
-	            'tools',
-	            'issues_h',
-	            'issues'
-	        ]]
-	    ];
-
-	    var headings = {
-	        'help.help.open_data_h': 3,
-	        'help.help.before_start_h': 3,
-	        'help.help.open_source_h': 3,
-	        'help.overview.navigation_h': 3,
-	        'help.overview.features_h': 3,
-	        'help.editing.select_h': 3,
-	        'help.editing.multiselect_h': 3,
-	        'help.editing.undo_redo_h': 3,
-	        'help.editing.save_h': 3,
-	        'help.editing.upload_h': 3,
-	        'help.editing.backups_h': 3,
-	        'help.editing.keyboard_h': 3,
-	        'help.feature_editor.type_h': 3,
-	        'help.feature_editor.fields_h': 3,
-	        'help.feature_editor.tags_h': 3,
-	        'help.points.add_point_h': 3,
-	        'help.points.move_point_h': 3,
-	        'help.points.delete_point_h': 3,
-	        'help.lines.add_line_h': 3,
-	        'help.lines.modify_line_h': 3,
-	        'help.lines.connect_line_h': 3,
-	        'help.lines.disconnect_line_h': 3,
-	        'help.lines.move_line_h': 3,
-	        'help.lines.delete_line_h': 3,
-	        'help.areas.point_or_area_h': 3,
-	        'help.areas.add_area_h': 3,
-	        'help.areas.square_area_h': 3,
-	        'help.areas.modify_area_h': 3,
-	        'help.areas.delete_area_h': 3,
-	        'help.relations.edit_relation_h': 3,
-	        'help.relations.maintain_relation_h': 3,
-	        'help.relations.relation_types_h': 2,
-	        'help.relations.multipolygon_h': 3,
-	        'help.relations.turn_restriction_h': 3,
-	        'help.relations.route_h': 3,
-	        'help.relations.boundary_h': 3,
-	        'help.notes.add_note_h': 3,
-	        'help.notes.update_note_h': 3,
-	        'help.notes.save_note_h': 3,
-	        'help.imagery.sources_h': 3,
-	        'help.imagery.offsets_h': 3,
-	        'help.streetlevel.using_h': 3,
-	        'help.gps.using_h': 3,
-	        'help.qa.tools_h': 3,
-	        'help.qa.issues_h': 3
-	    };
+	      if (d.languageCodes && d.languageCodes.length) {
+	        var languageList = d.languageCodes.map(function (code) {
+	          return _mainLocalizer.languageName(code);
+	        }).join(', ');
+	        moreEnter.append('div').attr('class', 'community-languages').html(_t.html('success.languages', {
+	          languages: languageList
+	        }));
+	      }
+	    }
 
-	    // For each section, squash all the texts into a single markdown document
-	    var docs = docKeys.map(function(key) {
-	        var helpkey = 'help.' + key[0];
-	        var helpPaneReplacements = { version: context.version };
-	        var text = key[1].reduce(function(all, part) {
-	            var subkey = helpkey + '.' + part;
-	            var depth = headings[subkey];                              // is this subkey a heading?
-	            var hhh = depth ? Array(depth + 1).join('#') + ' ' : '';   // if so, prepend with some ##'s
-	            return all + hhh + helpString(subkey, helpPaneReplacements) + '\n\n';
-	        }, '');
+	    function showNextEvents(selection) {
+	      var events = selection.append('div').attr('class', 'community-events');
+	      var item = events.selectAll('.community-event').data(nextEvents);
+	      var itemEnter = item.enter().append('div').attr('class', 'community-event');
+	      itemEnter.append('div').attr('class', 'community-event-name').append('a').attr('target', '_blank').attr('href', function (d) {
+	        return d.url;
+	      }).html(function (d) {
+	        var name = d.name;
+
+	        if (d.i18n && d.id) {
+	          name = _t("community.".concat(communityID, ".events.").concat(d.id, ".name"), {
+	            "default": name
+	          });
+	        }
 
-	        return {
-	            title: _t(helpkey + '.title'),
-	            html: marked_1(text.trim())
-	                // use keyboard key styling for shortcuts
-	                .replace(/<code>/g, '<kbd>')
-	                .replace(/<\/code>/g, '<\/kbd>')
+	        return name;
+	      });
+	      itemEnter.append('div').attr('class', 'community-event-when').html(function (d) {
+	        var options = {
+	          weekday: 'short',
+	          day: 'numeric',
+	          month: 'short',
+	          year: 'numeric'
 	        };
-	    });
 
-	    var helpPane = uiPane('help', context)
-	        .key(_t('help.key'))
-	        .title(_t('help.title'))
-	        .description(_t('help.title'))
-	        .iconName('iD-icon-help');
+	        if (d.date.getHours() || d.date.getMinutes()) {
+	          // include time if it has one
+	          options.hour = 'numeric';
+	          options.minute = 'numeric';
+	        }
 
-	    helpPane.renderContent = function(content) {
+	        return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
+	      });
+	      itemEnter.append('div').attr('class', 'community-event-where').html(function (d) {
+	        var where = d.where;
 
-	        function clickHelp(d, i) {
-	            var rtl = (_mainLocalizer.textDirection() === 'rtl');
-	            content.property('scrollTop', 0);
-	            helpPane.selection().select('.pane-heading h2').html(d.title);
+	        if (d.i18n && d.id) {
+	          where = _t("community.".concat(communityID, ".events.").concat(d.id, ".where"), {
+	            "default": where
+	          });
+	        }
 
-	            body.html(d.html);
-	            body.selectAll('a')
-	                .attr('target', '_blank');
-	            menuItems.classed('selected', function(m) {
-	                return m.title === d.title;
-	            });
+	        return where;
+	      });
+	      itemEnter.append('div').attr('class', 'community-event-description').html(function (d) {
+	        var description = d.description;
 
-	            nav.html('');
-	            if (rtl) {
-	                nav.call(drawNext).call(drawPrevious);
-	            } else {
-	                nav.call(drawPrevious).call(drawNext);
-	            }
+	        if (d.i18n && d.id) {
+	          description = _t("community.".concat(communityID, ".events.").concat(d.id, ".description"), {
+	            "default": description
+	          });
+	        }
+
+	        return description;
+	      });
+	    }
 
+	    function linkify(url, text) {
+	      text = text || url;
+	      return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
+	    }
+	  }
 
-	            function drawNext(selection) {
-	                if (i < docs.length - 1) {
-	                    var nextLink = selection
-	                        .append('a')
-	                        .attr('class', 'next')
-	                        .on('click', function() {
-	                            clickHelp(docs[i + 1], i + 1);
-	                        });
+	  success.changeset = function (val) {
+	    if (!arguments.length) return _changeset;
+	    _changeset = val;
+	    return success;
+	  };
 
-	                    nextLink
-	                        .append('span')
-	                        .text(docs[i + 1].title)
-	                        .call(svgIcon((rtl ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'));
-	                }
-	            }
+	  success.location = function (val) {
+	    if (!arguments.length) return _location;
+	    _location = val;
+	    return success;
+	  };
 
+	  return utilRebind(success, dispatch$1, 'on');
+	}
 
-	            function drawPrevious(selection) {
-	                if (i > 0) {
-	                    var prevLink = selection
-	                        .append('a')
-	                        .attr('class', 'previous')
-	                        .on('click', function() {
-	                            clickHelp(docs[i - 1], i - 1);
-	                        });
+	function modeSave(context) {
+	  var mode = {
+	    id: 'save'
+	  };
+	  var keybinding = utilKeybinding('modeSave');
+	  var commit = uiCommit(context).on('cancel', cancel);
 
-	                    prevLink
-	                        .call(svgIcon((rtl ? '#iD-icon-forward' : '#iD-icon-backward'), 'inline'))
-	                        .append('span')
-	                        .text(docs[i - 1].title);
-	                }
-	            }
-	        }
+	  var _conflictsUi; // uiConflicts
 
 
-	        function clickWalkthrough() {
-	            if (context.inIntro()) { return; }
-	            context.container().call(uiIntro(context));
-	            context.ui().togglePanes();
-	        }
+	  var _location;
 
+	  var _success;
 
-	        function clickShortcuts() {
-	            context.container().call(uiShortcuts(context), true);
-	        }
+	  var uploader = context.uploader().on('saveStarted.modeSave', function () {
+	    keybindingOff();
+	  }) // fire off some async work that we want to be ready later
+	  .on('willAttemptUpload.modeSave', prepareForSuccess).on('progressChanged.modeSave', showProgress).on('resultNoChanges.modeSave', function () {
+	    cancel();
+	  }).on('resultErrors.modeSave', showErrors).on('resultConflicts.modeSave', showConflicts).on('resultSuccess.modeSave', showSuccess);
 
-	        var toc = content
-	            .append('ul')
-	            .attr('class', 'toc');
+	  function cancel() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	        var menuItems = toc.selectAll('li')
-	            .data(docs)
-	            .enter()
-	            .append('li')
-	            .append('a')
-	            .html(function(d) { return d.title; })
-	            .on('click', clickHelp);
-
-	        var shortcuts = toc
-	            .append('li')
-	            .attr('class', 'shortcuts')
-	            .call(uiTooltip()
-	                .title(_t('shortcuts.tooltip'))
-	                .keys(['?'])
-	                .placement('top')
-	            )
-	            .append('a')
-	            .on('click', clickShortcuts);
-
-	        shortcuts
-	            .append('div')
-	            .text(_t('shortcuts.title'));
+	  function showProgress(num, total) {
+	    var modal = context.container().select('.loading-modal .modal-section');
+	    var progress = modal.selectAll('.progress').data([0]); // enter/update
+
+	    progress.enter().append('div').attr('class', 'progress').merge(progress).text(_t('save.conflict_progress', {
+	      num: num,
+	      total: total
+	    }));
+	  }
+
+	  function showConflicts(changeset, conflicts, origChanges) {
+	    var selection = context.container().select('.sidebar').append('div').attr('class', 'sidebar-component');
+	    context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+	    _conflictsUi = uiConflicts(context).conflictList(conflicts).origChanges(origChanges).on('cancel', function () {
+	      context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+	      selection.remove();
+	      keybindingOn();
+	      uploader.cancelConflictResolution();
+	    }).on('save', function () {
+	      context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+	      selection.remove();
+	      uploader.processResolvedConflicts(changeset);
+	    });
+	    selection.call(_conflictsUi);
+	  }
+
+	  function showErrors(errors) {
+	    keybindingOn();
+	    var selection = uiConfirm(context.container());
+	    selection.select('.modal-section.header').append('h3').text(_t('save.error'));
+	    addErrors(selection, errors);
+	    selection.okButton();
+	  }
+
+	  function addErrors(selection, data) {
+	    var message = selection.select('.modal-section.message-text');
+	    var items = message.selectAll('.error-container').data(data);
+	    var enter = items.enter().append('div').attr('class', 'error-container');
+	    enter.append('a').attr('class', 'error-description').attr('href', '#').classed('hide-toggle', true).text(function (d) {
+	      return d.msg || _t('save.unknown_error_details');
+	    }).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      var error = select(this);
+	      var detail = select(this.nextElementSibling);
+	      var exp = error.classed('expanded');
+	      detail.style('display', exp ? 'none' : 'block');
+	      error.classed('expanded', !exp);
+	    });
+	    var details = enter.append('div').attr('class', 'error-detail-container').style('display', 'none');
+	    details.append('ul').attr('class', 'error-detail-list').selectAll('li').data(function (d) {
+	      return d.details || [];
+	    }).enter().append('li').attr('class', 'error-detail-item').text(function (d) {
+	      return d;
+	    });
+	    items.exit().remove();
+	  }
 
-	        var walkthrough = toc
-	            .append('li')
-	            .attr('class', 'walkthrough')
-	            .append('a')
-	            .on('click', clickWalkthrough);
+	  function showSuccess(changeset) {
+	    commit.reset();
 
-	        walkthrough
-	            .append('svg')
-	            .attr('class', 'logo logo-walkthrough')
-	            .append('use')
-	            .attr('xlink:href', '#iD-logo-walkthrough');
+	    var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
+	      context.ui().sidebar.hide();
+	    });
 
-	        walkthrough
-	            .append('div')
-	            .text(_t('splash.walkthrough'));
+	    context.enter(modeBrowse(context).sidebar(ui));
+	  }
 
+	  function keybindingOn() {
+	    select(document).call(keybinding.on('⎋', cancel, true));
+	  }
 
-	        var helpContent = content
-	            .append('div')
-	            .attr('class', 'left-content');
+	  function keybindingOff() {
+	    select(document).call(keybinding.unbind);
+	  } // Reverse geocode current map location so we can display a message on
+	  // the success screen like "Thank you for editing around place, region."
 
-	        var body = helpContent
-	            .append('div')
-	            .attr('class', 'body');
 
-	        var nav = helpContent
-	            .append('div')
-	            .attr('class', 'nav');
+	  function prepareForSuccess() {
+	    _success = uiSuccess(context);
+	    _location = null;
+	    if (!services.geocoder) return;
+	    services.geocoder.reverse(context.map().center(), function (err, result) {
+	      if (err || !result || !result.address) return;
+	      var addr = result.address;
+	      var place = addr && (addr.town || addr.city || addr.county) || '';
+	      var region = addr && (addr.state || addr.country) || '';
+	      var separator = place && region ? _t('success.thank_you_where.separator') : '';
+	      _location = _t('success.thank_you_where.format', {
+	        place: place,
+	        separator: separator,
+	        region: region
+	      });
+	    });
+	  }
+
+	  mode.selectedIDs = function () {
+	    return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
+	  };
 
-	        clickHelp(docs[0], 0);
+	  mode.enter = function () {
+	    // Show sidebar
+	    context.ui().sidebar.expand();
 
-	    };
+	    function done() {
+	      context.ui().sidebar.show(commit);
+	    }
+
+	    keybindingOn();
+	    context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+	    var osm = context.connection();
+
+	    if (!osm) {
+	      cancel();
+	      return;
+	    }
+
+	    if (osm.authenticated()) {
+	      done();
+	    } else {
+	      osm.authenticate(function (err) {
+	        if (err) {
+	          cancel();
+	        } else {
+	          done();
+	        }
+	      });
+	    }
+	  };
+
+	  mode.exit = function () {
+	    keybindingOff();
+	    context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+	    context.ui().sidebar.hide();
+	  };
 
-	    return helpPane;
+	  return mode;
 	}
 
-	function uiSectionValidationIssues(id, severity, context) {
+	function uiToolOldDrawModes(context) {
+	  var tool = {
+	    id: 'old_modes',
+	    label: _t.html('toolbar.add_feature')
+	  };
+	  var modes = [modeAddPoint(context, {
+	    title: _t.html('modes.add_point.title'),
+	    button: 'point',
+	    description: _t.html('modes.add_point.description'),
+	    preset: _mainPresetIndex.item('point'),
+	    key: '1'
+	  }), modeAddLine(context, {
+	    title: _t.html('modes.add_line.title'),
+	    button: 'line',
+	    description: _t.html('modes.add_line.description'),
+	    preset: _mainPresetIndex.item('line'),
+	    key: '2'
+	  }), modeAddArea(context, {
+	    title: _t.html('modes.add_area.title'),
+	    button: 'area',
+	    description: _t.html('modes.add_area.description'),
+	    preset: _mainPresetIndex.item('area'),
+	    key: '3'
+	  })];
+
+	  function enabled() {
+	    return osmEditable();
+	  }
+
+	  function osmEditable() {
+	    return context.editable();
+	  }
+
+	  modes.forEach(function (mode) {
+	    context.keybinding().on(mode.key, function () {
+	      if (!enabled()) return;
+
+	      if (mode.id === context.mode().id) {
+	        context.enter(modeBrowse(context));
+	      } else {
+	        context.enter(mode);
+	      }
+	    });
+	  });
 
-	    var _issues = [];
+	  tool.render = function (selection) {
+	    var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');
 
-	    var section = uiSection(id, context)
-	        .title(function() {
-	            if (!_issues) { return ''; }
-	            var issueCountText = _issues.length > 1000 ? '1000+' : String(_issues.length);
-	            return _t('issues.' + severity + 's.list_title', { count: issueCountText });
-	        })
-	        .disclosureContent(renderDisclosureContent)
-	        .shouldDisplay(function() {
-	            return _issues && _issues.length;
-	        });
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
+
+	    context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
+	    context.on('enter.modes', update);
+	    update();
 
-	    function getOptions() {
-	        return {
-	            what: corePreferences('validate-what') || 'edited',
-	            where: corePreferences('validate-where') || 'all'
-	        };
-	    }
+	    function update() {
+	      var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
+	        return d.id;
+	      }); // exit
 
-	    // get and cache the issues to display, unordered
-	    function reloadIssues() {
-	        _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
-	    }
+	      buttons.exit().remove(); // enter
 
-	    function renderDisclosureContent(selection) {
+	      var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+	        return d.id + ' add-button bar-button';
+	      }).on('click.mode-buttons', function (d3_event, d) {
+	        if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042
 
-	        var center = context.map().center();
-	        var graph = context.graph();
+	        var currMode = context.mode().id;
+	        if (/^draw/.test(currMode)) return;
 
-	        // sort issues by distance away from the center of the map
-	        var issues = _issues.map(function withDistance(issue) {
-	                var extent = issue.extent(graph);
-	                var dist = extent ? geoSphericalDistance(center, extent.center()) : 0;
-	                return Object.assign(issue, { dist: dist });
-	            })
-	            .sort(function byDistance(a, b) {
-	                return a.dist - b.dist;
-	            });
+	        if (d.id === currMode) {
+	          context.enter(modeBrowse(context));
+	        } else {
+	          context.enter(d);
+	        }
+	      }).call(uiTooltip().placement('bottom').title(function (d) {
+	        return d.description;
+	      }).keys(function (d) {
+	        return [d.key];
+	      }).scrollContainer(context.container().select('.top-toolbar')));
+	      buttonsEnter.each(function (d) {
+	        select(this).call(svgIcon('#iD-icon-' + d.button));
+	      });
+	      buttonsEnter.append('span').attr('class', 'label').html(function (mode) {
+	        return mode.title;
+	      }); // if we are adding/removing the buttons, check if toolbar has overflowed
 
-	        // cut off at 1000
-	        issues = issues.slice(0, 1000);
+	      if (buttons.enter().size() || buttons.exit().size()) {
+	        context.ui().checkOverflow('.top-toolbar', true);
+	      } // update
 
-	        //renderIgnoredIssuesReset(_warningsSelection);
 
-	        selection
-	            .call(drawIssuesList, issues);
+	      buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
+	        return !enabled();
+	      }).classed('active', function (d) {
+	        return context.mode() && context.mode().button === d.button;
+	      });
 	    }
+	  };
 
-	    function drawIssuesList(selection, issues) {
-	        var list = selection.selectAll('.issues-list')
-	            .data([0]);
+	  return tool;
+	}
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list issues-list ' + severity + 's-list')
-	            .merge(list);
+	function uiToolNotes(context) {
+	  var tool = {
+	    id: 'notes',
+	    label: _t.html('modes.add_note.label')
+	  };
+	  var mode = modeAddNote(context);
 
+	  function enabled() {
+	    return notesEnabled() && notesEditable();
+	  }
 
-	        var items = list.selectAll('li')
-	            .data(issues, function(d) { return d.id; });
+	  function notesEnabled() {
+	    var noteLayer = context.layers().layer('notes');
+	    return noteLayer && noteLayer.enabled();
+	  }
 
-	        // Exit
-	        items.exit()
-	            .remove();
+	  function notesEditable() {
+	    var mode = context.mode();
+	    return context.map().notesEditable() && mode && mode.id !== 'save';
+	  }
 
-	        // Enter
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', function (d) { return 'issue severity-' + d.severity; })
-	            .on('click', function(d) {
-	                context.validator().focusIssue(d);
-	            })
-	            .on('mouseover', function(d) {
-	                utilHighlightEntities(d.entityIds, true, context);
-	            })
-	            .on('mouseout', function(d) {
-	                utilHighlightEntities(d.entityIds, false, context);
-	            });
+	  context.keybinding().on(mode.key, function () {
+	    if (!enabled()) return;
 
+	    if (mode.id === context.mode().id) {
+	      context.enter(modeBrowse(context));
+	    } else {
+	      context.enter(mode);
+	    }
+	  });
 
-	        var labelsEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'issue-label');
-
-	        var textEnter = labelsEnter
-	            .append('span')
-	            .attr('class', 'issue-text');
-
-	        textEnter
-	            .append('span')
-	            .attr('class', 'issue-icon')
-	            .each(function(d) {
-	                var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
-	                select(this)
-	                    .call(svgIcon(iconName));
-	            });
+	  tool.render = function (selection) {
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
-	        textEnter
-	            .append('span')
-	            .attr('class', 'issue-message');
+	    context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
+	    context.on('enter.notes', update);
+	    update();
 
-	        /*
-	        labelsEnter
-	            .append('span')
-	            .attr('class', 'issue-autofix')
-	            .each(function(d) {
-	                if (!d.autoFix) return;
-
-	                d3_select(this)
-	                    .append('button')
-	                    .attr('title', t('issues.fix_one.title'))
-	                    .datum(d.autoFix)  // set button datum to the autofix
-	                    .attr('class', 'autofix action')
-	                    .on('click', function(d) {
-	                        d3_event.preventDefault();
-	                        d3_event.stopPropagation();
-
-	                        var issuesEntityIDs = d.issue.entityIds;
-	                        utilHighlightEntities(issuesEntityIDs.concat(d.entityIds), false, context);
-
-	                        context.perform.apply(context, d.autoArgs);
-	                        context.validator().validate();
-	                    })
-	                    .call(svgIcon('#iD-icon-wrench'));
-	            });
-	        */
+	    function update() {
+	      var showNotes = notesEnabled();
+	      var data = showNotes ? [mode] : [];
+	      var buttons = selection.selectAll('button.add-button').data(data, function (d) {
+	        return d.id;
+	      }); // exit
 
-	        // Update
-	        items = items
-	            .merge(itemsEnter)
-	            .order();
+	      buttons.exit().remove(); // enter
 
-	        items.selectAll('.issue-message')
-	            .text(function(d) {
-	                return d.message(context);
-	            });
+	      var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+	        return d.id + ' add-button bar-button';
+	      }).on('click.notes', function (d3_event, d) {
+	        if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042
 
-	        /*
-	        // autofix
-	        var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
-
-	        var autoFixAll = selection.selectAll('.autofix-all')
-	            .data(canAutoFix.length ? [0] : []);
-
-	        // exit
-	        autoFixAll.exit()
-	            .remove();
-
-	        // enter
-	        var autoFixAllEnter = autoFixAll.enter()
-	            .insert('div', '.issues-list')
-	            .attr('class', 'autofix-all');
-
-	        var linkEnter = autoFixAllEnter
-	            .append('a')
-	            .attr('class', 'autofix-all-link')
-	            .attr('href', '#');
-
-	        linkEnter
-	            .append('span')
-	            .attr('class', 'autofix-all-link-text')
-	            .text(t('issues.fix_all.title'));
-
-	        linkEnter
-	            .append('span')
-	            .attr('class', 'autofix-all-link-icon')
-	            .call(svgIcon('#iD-icon-wrench'));
-
-	        if (severity === 'warning') {
-	            renderIgnoredIssuesReset(selection);
-	        }
-
-	        // update
-	        autoFixAll = autoFixAll
-	            .merge(autoFixAllEnter);
-
-	        autoFixAll.selectAll('.autofix-all-link')
-	            .on('click', function() {
-	                context.pauseChangeDispatch();
-	                context.perform(actionNoop());
-	                canAutoFix.forEach(function(issue) {
-	                    var args = issue.autoFix.autoArgs.slice();  // copy
-	                    if (typeof args[args.length - 1] !== 'function') {
-	                        args.pop();
-	                    }
-	                    args.push(t('issues.fix_all.annotation'));
-	                    context.replace.apply(context, args);
-	                });
-	                context.resumeChangeDispatch();
-	                context.validator().validate();
-	            });
-	        */
-	    }
+	        var currMode = context.mode().id;
+	        if (/^draw/.test(currMode)) return;
 
-	    context.validator().on('validated.uiSectionValidationIssues' + id, function() {
-	        window.requestIdleCallback(function() {
-	            reloadIssues();
-	            section.reRender();
-	        });
-	    });
+	        if (d.id === currMode) {
+	          context.enter(modeBrowse(context));
+	        } else {
+	          context.enter(d);
+	        }
+	      }).call(uiTooltip().placement('bottom').title(function (d) {
+	        return d.description;
+	      }).keys(function (d) {
+	        return [d.key];
+	      }).scrollContainer(context.container().select('.top-toolbar')));
+	      buttonsEnter.each(function (d) {
+	        select(this).call(svgIcon(d.icon || '#iD-icon-' + d.button));
+	      }); // if we are adding/removing the buttons, check if toolbar has overflowed
+
+	      if (buttons.enter().size() || buttons.exit().size()) {
+	        context.ui().checkOverflow('.top-toolbar', true);
+	      } // update
+
+
+	      buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
+	        return !enabled();
+	      }).classed('active', function (d) {
+	        return context.mode() && context.mode().button === d.button;
+	      });
+	    }
+	  };
 
-	    context.map().on('move.uiSectionValidationIssues' + id,
-	        debounce(function() {
-	            window.requestIdleCallback(function() {
-	                if (getOptions().where === 'visible') {
-	                    // must refetch issues if they are viewport-dependent
-	                    reloadIssues();
-	                }
-	                // always reload list to re-sort-by-distance
-	                section.reRender();
-	            });
-	        }, 1000)
-	    );
+	  tool.uninstall = function () {
+	    context.on('enter.editor.notes', null).on('exit.editor.notes', null).on('enter.notes', null);
+	    context.map().on('move.notes', null).on('drawn.notes', null);
+	  };
 
-	    return section;
+	  return tool;
 	}
 
-	function uiSectionValidationOptions(context) {
+	function uiToolSave(context) {
+	  var tool = {
+	    id: 'save',
+	    label: _t.html('save.title')
+	  };
+	  var button = null;
+	  var tooltipBehavior = null;
+	  var history = context.history();
+	  var key = uiCmd('⌘S');
+	  var _numChanges = 0;
 
-	    var section = uiSection('issues-options', context)
-	        .content(renderContent);
+	  function isSaving() {
+	    var mode = context.mode();
+	    return mode && mode.id === 'save';
+	  }
 
-	    function renderContent(selection) {
+	  function isDisabled() {
+	    return _numChanges === 0 || isSaving();
+	  }
 
-	        var container = selection.selectAll('.issues-options-container')
-	            .data([0]);
+	  function save(d3_event) {
+	    d3_event.preventDefault();
 
-	        container = container.enter()
-	            .append('div')
-	            .attr('class', 'issues-options-container')
-	            .merge(container);
+	    if (!context.inIntro() && !isSaving() && history.hasChanges()) {
+	      context.enter(modeSave(context));
+	    }
+	  }
 
-	        var data = [
-	            { key: 'what', values: ['edited', 'all'] },
-	            { key: 'where', values: ['visible', 'all'] }
-	        ];
+	  function bgColor() {
+	    var step;
 
-	        var options = container.selectAll('.issues-option')
-	            .data(data, function(d) { return d.key; });
+	    if (_numChanges === 0) {
+	      return null;
+	    } else if (_numChanges <= 50) {
+	      step = _numChanges / 50;
+	      return d3_interpolateRgb('#fff', '#ff8')(step); // white -> yellow
+	    } else {
+	      step = Math.min((_numChanges - 50) / 50, 1.0);
+	      return d3_interpolateRgb('#ff8', '#f88')(step); // yellow -> red
+	    }
+	  }
 
-	        var optionsEnter = options.enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'issues-option issues-option-' + d.key; });
+	  function updateCount() {
+	    var val = history.difference().summary().length;
+	    if (val === _numChanges) return;
+	    _numChanges = val;
 
-	        optionsEnter
-	            .append('div')
-	            .attr('class', 'issues-option-title')
-	            .text(function(d) { return _t('issues.options.' + d.key + '.title'); });
+	    if (tooltipBehavior) {
+	      tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);
+	    }
 
-	        var valuesEnter = optionsEnter.selectAll('label')
-	            .data(function(d) {
-	                return d.values.map(function(val) { return { value: val, key: d.key }; });
-	            })
-	            .enter()
-	            .append('label');
+	    if (button) {
+	      button.classed('disabled', isDisabled()).style('background', bgColor());
+	      button.select('span.count').html(_numChanges);
+	    }
+	  }
 
-	        valuesEnter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', function(d) { return 'issues-option-' + d.key; })
-	            .attr('value', function(d) { return d.value; })
-	            .property('checked', function(d) { return getOptions()[d.key] === d.value; })
-	            .on('change', function(d) { updateOptionValue(d.key, d.value); });
+	  tool.render = function (selection) {
+	    tooltipBehavior = uiTooltip().placement('bottom').title(_t.html('save.no_changes')).keys([key]).scrollContainer(context.container().select('.top-toolbar'));
+	    var lastPointerUpType;
+	    button = selection.append('button').attr('class', 'save disabled bar-button').on('pointerup', function (d3_event) {
+	      lastPointerUpType = d3_event.pointerType;
+	    }).on('click', function (d3_event) {
+	      save(d3_event);
 
-	        valuesEnter
-	            .append('span')
-	            .text(function(d) { return _t('issues.options.' + d.key + '.' + d.value); });
-	    }
+	      if (_numChanges === 0 && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
+	        // there are no tooltips for touch interactions so flash feedback instead
+	        context.ui().flash.duration(2000).iconName('#iD-icon-save').iconClass('disabled').label(_t.html('save.no_changes'))();
+	      }
 
-	    function getOptions() {
-	        return {
-	            what: corePreferences('validate-what') || 'edited',  // 'all', 'edited'
-	            where: corePreferences('validate-where') || 'all'    // 'all', 'visible'
-	        };
-	    }
+	      lastPointerUpType = null;
+	    }).call(tooltipBehavior);
+	    button.call(svgIcon('#iD-icon-save'));
+	    button.append('span').attr('class', 'count').attr('aria-hidden', 'true').html('0');
+	    updateCount();
+	    context.keybinding().on(key, save, true);
+	    context.history().on('change.save', updateCount);
+	    context.on('enter.save', function () {
+	      if (button) {
+	        button.classed('disabled', isDisabled());
 
-	    function updateOptionValue(d, val) {
-	        if (!val && event && event.target) {
-	            val = event.target.value;
+	        if (isSaving()) {
+	          button.call(tooltipBehavior.hide);
 	        }
+	      }
+	    });
+	  };
 
-	        corePreferences('validate-' + d, val);
-	        context.validator().validate();
-	    }
+	  tool.uninstall = function () {
+	    context.keybinding().off(key, true);
+	    context.history().on('change.save', null);
+	    context.on('enter.save', null);
+	    button = null;
+	    tooltipBehavior = null;
+	  };
 
-	    return section;
+	  return tool;
 	}
 
-	function uiSectionValidationRules(context) {
+	function uiToolSidebarToggle(context) {
+	  var tool = {
+	    id: 'sidebar_toggle',
+	    label: _t.html('toolbar.inspect')
+	  };
 
-	    var MINSQUARE = 0;
-	    var MAXSQUARE = 20;
-	    var DEFAULTSQUARE = 5;  // see also unsquare_way.js
+	  tool.render = function (selection) {
+	    selection.append('button').attr('class', 'bar-button').on('click', function () {
+	      context.ui().sidebar.toggle();
+	    }).call(uiTooltip().placement('bottom').title(_t.html('sidebar.tooltip')).keys([_t('sidebar.key')]).scrollContainer(context.container().select('.top-toolbar'))).call(svgIcon('#iD-icon-sidebar-' + (_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')));
+	  };
 
-	    var section = uiSection('issues-rules', context)
-	        .disclosureContent(renderDisclosureContent)
-	        .title(_t('issues.rules.title'));
+	  return tool;
+	}
 
-	    var _ruleKeys = context.validator().getRuleKeys()
-	        .filter(function(key) { return key !== 'maprules'; })
-	        .sort(function(key1, key2) {
-	            // alphabetize by localized title
-	            return _t('issues.' + key1 + '.title') < _t('issues.' + key2 + '.title') ? -1 : 1;
-	        });
+	function uiToolUndoRedo(context) {
+	  var tool = {
+	    id: 'undo_redo',
+	    label: _t.html('toolbar.undo_redo')
+	  };
+	  var commands = [{
+	    id: 'undo',
+	    cmd: uiCmd('⌘Z'),
+	    action: function action() {
+	      context.undo();
+	    },
+	    annotation: function annotation() {
+	      return context.history().undoAnnotation();
+	    },
+	    icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')
+	  }, {
+	    id: 'redo',
+	    cmd: uiCmd('⌘⇧Z'),
+	    action: function action() {
+	      context.redo();
+	    },
+	    annotation: function annotation() {
+	      return context.history().redoAnnotation();
+	    },
+	    icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'undo' : 'redo')
+	  }];
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.issues-rulelist-container')
-	            .data([0]);
+	  function editable() {
+	    return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
+	    /* ignore min zoom */
+	    );
+	  }
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'issues-rulelist-container');
+	  tool.render = function (selection) {
+	    var tooltipBehavior = uiTooltip().placement('bottom').title(function (d) {
+	      return d.annotation() ? _t.html(d.id + '.tooltip', {
+	        action: d.annotation()
+	      }) : _t.html(d.id + '.nothing');
+	    }).keys(function (d) {
+	      return [d.cmd];
+	    }).scrollContainer(context.container().select('.top-toolbar'));
+	    var lastPointerUpType;
+	    var buttons = selection.selectAll('button').data(commands).enter().append('button').attr('class', function (d) {
+	      return 'disabled ' + d.id + '-button bar-button';
+	    }).on('pointerup', function (d3_event) {
+	      // `pointerup` is always called before `click`
+	      lastPointerUpType = d3_event.pointerType;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      var annotation = d.annotation();
+
+	      if (editable() && annotation) {
+	        d.action();
+	      }
 
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'layer-list issue-rules-list');
+	      if (editable() && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
+	        // there are no tooltips for touch interactions so flash feedback instead
+	        var text = annotation ? _t(d.id + '.tooltip', {
+	          action: annotation
+	        }) : _t(d.id + '.nothing');
+	        context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass(annotation ? '' : 'disabled').label(text)();
+	      }
 
-	        var ruleLinks = containerEnter
-	            .append('div')
-	            .attr('class', 'issue-rules-links section-footer');
-
-	        ruleLinks
-	            .append('a')
-	            .attr('class', 'issue-rules-link')
-	            .attr('href', '#')
-	            .text(_t('issues.enable_all'))
-	            .on('click', function() {
-	                context.validator().disableRules([]);
-	            });
+	      lastPointerUpType = null;
+	    }).call(tooltipBehavior);
+	    buttons.each(function (d) {
+	      select(this).call(svgIcon('#' + d.icon));
+	    });
+	    context.keybinding().on(commands[0].cmd, function (d3_event) {
+	      d3_event.preventDefault();
+	      if (editable()) commands[0].action();
+	    }).on(commands[1].cmd, function (d3_event) {
+	      d3_event.preventDefault();
+	      if (editable()) commands[1].action();
+	    });
 
-	        ruleLinks
-	            .append('a')
-	            .attr('class', 'issue-rules-link')
-	            .attr('href', '#')
-	            .text(_t('issues.disable_all'))
-	            .on('click', function() {
-	                context.validator().disableRules(_ruleKeys);
-	            });
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
+	    context.map().on('move.undo_redo', debouncedUpdate).on('drawn.undo_redo', debouncedUpdate);
+	    context.history().on('change.undo_redo', function (difference) {
+	      if (difference) update();
+	    });
+	    context.on('enter.undo_redo', update);
 
-	        // Update
-	        container = container
-	            .merge(containerEnter);
+	    function update() {
+	      buttons.classed('disabled', function (d) {
+	        return !editable() || !d.annotation();
+	      }).each(function () {
+	        var selection = select(this);
 
-	        container.selectAll('.issue-rules-list')
-	            .call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
+	        if (!selection.select('.tooltip.in').empty()) {
+	          selection.call(tooltipBehavior.updateContent);
+	        }
+	      });
 	    }
+	  };
 
-	    function drawListItems(selection, data, type, name, change, active) {
-	        var items = selection.selectAll('li')
-	            .data(data);
+	  tool.uninstall = function () {
+	    context.keybinding().off(commands[0].cmd).off(commands[1].cmd);
+	    context.map().on('move.undo_redo', null).on('drawn.undo_redo', null);
+	    context.history().on('change.undo_redo', null);
+	    context.on('enter.undo_redo', null);
+	  };
 
-	        // Exit
-	        items.exit()
-	            .remove();
+	  return tool;
+	}
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('li');
+	function uiTopToolbar(context) {
+	  var sidebarToggle = uiToolSidebarToggle(context),
+	      modes = uiToolOldDrawModes(context),
+	      notes = uiToolNotes(context),
+	      undoRedo = uiToolUndoRedo(context),
+	      save = uiToolSave(context);
+
+	  function notesEnabled() {
+	    var noteLayer = context.layers().layer('notes');
+	    return noteLayer && noteLayer.enabled();
+	  }
+
+	  function topToolbar(bar) {
+	    bar.on('wheel.topToolbar', function (d3_event) {
+	      if (!d3_event.deltaX) {
+	        // translate vertical scrolling into horizontal scrolling in case
+	        // the user doesn't have an input device that can scroll horizontally
+	        bar.node().scrollLeft += d3_event.deltaY;
+	      }
+	    });
 
-	        if (name === 'rule') {
-	            enter
-	                .call(uiTooltip()
-	                    .title(function(d) { return _t('issues.' + d + '.tip'); })
-	                    .placement('top')
-	                );
-	        }
+	    var debouncedUpdate = debounce(update, 500, {
+	      leading: true,
+	      trailing: true
+	    });
 
-	        var label = enter
-	            .append('label');
+	    context.layers().on('change.topToolbar', debouncedUpdate);
+	    update();
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', name)
-	            .on('change', change);
+	    function update() {
+	      var tools = [sidebarToggle, 'spacer', modes];
+	      tools.push('spacer');
 
-	        label
-	            .append('span')
-	            .html(function(d) {
-	                var params = {};
-	                if (d === 'unsquare_way') {
-	                    params.val = '<span class="square-degrees"></span>';
-	                }
-	                return _t('issues.' + d + '.title', params);
-	            });
+	      if (notesEnabled()) {
+	        tools = tools.concat([notes, 'spacer']);
+	      }
 
-	        // Update
-	        items = items
-	            .merge(enter);
-
-	        items
-	            .classed('active', active)
-	            .selectAll('input')
-	            .property('checked', active)
-	            .property('indeterminate', false);
-
-
-	        // user-configurable square threshold
-	        var degStr = corePreferences('validate-square-degrees');
-	        if (degStr === null) {
-	            degStr = '' + DEFAULTSQUARE;
-	        }
-
-	        var span = items.selectAll('.square-degrees');
-	        var input = span.selectAll('.square-degrees-input')
-	            .data([0]);
-
-	        // enter / update
-	        input.enter()
-	            .append('input')
-	            .attr('type', 'number')
-	            .attr('min', '' + MINSQUARE)
-	            .attr('max', '' + MAXSQUARE)
-	            .attr('step', '0.5')
-	            .attr('class', 'square-degrees-input')
-	            .call(utilNoAuto)
-	            .on('click', function () {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                this.select();
-	            })
-	            .on('keyup', function () {
-	                if (event.keyCode === 13) { // enter
-	                    this.blur();
-	                    this.select();
-	                }
-	            })
-	            .on('blur', changeSquare)
-	            .merge(input)
-	            .property('value', degStr);
+	      tools = tools.concat([undoRedo, save]);
+	      var toolbarItems = bar.selectAll('.toolbar-item').data(tools, function (d) {
+	        return d.id || d;
+	      });
+	      toolbarItems.exit().each(function (d) {
+	        if (d.uninstall) {
+	          d.uninstall();
+	        }
+	      }).remove();
+	      var itemsEnter = toolbarItems.enter().append('div').attr('class', function (d) {
+	        var classes = 'toolbar-item ' + (d.id || d).replace('_', '-');
+	        if (d.klass) classes += ' ' + d.klass;
+	        return classes;
+	      });
+	      var actionableItems = itemsEnter.filter(function (d) {
+	        return d !== 'spacer';
+	      });
+	      actionableItems.append('div').attr('class', 'item-content').each(function (d) {
+	        select(this).call(d.render, bar);
+	      });
+	      actionableItems.append('div').attr('class', 'item-label').html(function (d) {
+	        return d.label;
+	      });
 	    }
+	  }
 
-	    function changeSquare() {
-	        var input = select(this);
-	        var degStr = utilGetSetValue(input).trim();
-	        var degNum = parseFloat(degStr, 10);
+	  return topToolbar;
+	}
 
-	        if (!isFinite(degNum)) {
-	            degNum = DEFAULTSQUARE;
-	        } else if (degNum > MAXSQUARE) {
-	            degNum = MAXSQUARE;
-	        } else if (degNum < MINSQUARE) {
-	            degNum = MINSQUARE;
-	        }
+	var sawVersion = null;
+	var isNewVersion = false;
+	var isNewUser = false;
+	function uiVersion(context) {
+	  var currVersion = context.version;
+	  var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
 
-	        degNum = Math.round(degNum * 10 ) / 10;   // round to 1 decimal
-	        degStr = '' + degNum;
+	  if (sawVersion === null && matchedVersion !== null) {
+	    if (corePreferences('sawVersion')) {
+	      isNewUser = false;
+	      isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
+	    } else {
+	      isNewUser = true;
+	      isNewVersion = true;
+	    }
 
-	        input
-	            .property('value', degStr);
+	    corePreferences('sawVersion', currVersion);
+	    sawVersion = currVersion;
+	  }
 
-	        corePreferences('validate-square-degrees', degStr);
-	        context.validator().reloadUnsquareIssues();
-	    }
+	  return function (selection) {
+	    selection.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD').html(currVersion); // only show new version indicator to users that have used iD before
 
-	    function isRuleEnabled(d) {
-	        return context.validator().isRuleEnabled(d);
+	    if (isNewVersion && !isNewUser) {
+	      selection.append('div').attr('class', 'badge').append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/release/CHANGELOG.md#whats-new').call(svgIcon('#maki-gift-11')).call(uiTooltip().title(_t.html('version.whats_new', {
+	        version: currVersion
+	      })).placement('top'));
 	    }
+	  };
+	}
 
-	    function toggleRule(d) {
-	        context.validator().toggleRule(d);
-	    }
+	function uiZoom(context) {
+	  var zooms = [{
+	    id: 'zoom-in',
+	    icon: 'iD-icon-plus',
+	    title: _t.html('zoom.in'),
+	    action: zoomIn,
+	    disabled: function disabled() {
+	      return !context.map().canZoomIn();
+	    },
+	    disabledTitle: _t.html('zoom.disabled.in'),
+	    key: '+'
+	  }, {
+	    id: 'zoom-out',
+	    icon: 'iD-icon-minus',
+	    title: _t.html('zoom.out'),
+	    action: zoomOut,
+	    disabled: function disabled() {
+	      return !context.map().canZoomOut();
+	    },
+	    disabledTitle: _t.html('zoom.disabled.out'),
+	    key: '-'
+	  }];
 
-	    context.validator().on('validated.uiSectionValidationRules', function() {
-	        window.requestIdleCallback(section.reRender);
-	    });
+	  function zoomIn(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomIn();
+	  }
 
-	    return section;
-	}
+	  function zoomOut(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomOut();
+	  }
 
-	function uiSectionValidationStatus(context) {
+	  function zoomInFurther(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomInFurther();
+	  }
 
-	    var section = uiSection('issues-status', context)
-	        .content(renderContent)
-	        .shouldDisplay(function() {
-	            var issues = context.validator().getIssues(getOptions());
-	            return issues.length === 0;
-	        });
+	  function zoomOutFurther(d3_event) {
+	    if (d3_event.shiftKey) return;
+	    d3_event.preventDefault();
+	    context.map().zoomOutFurther();
+	  }
 
-	    function getOptions() {
-	        return {
-	            what: corePreferences('validate-what') || 'edited',
-	            where: corePreferences('validate-where') || 'all'
-	        };
-	    }
+	  return function (selection) {
+	    var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function (d) {
+	      if (d.disabled()) {
+	        return d.disabledTitle;
+	      }
 
-	    function renderContent(selection) {
+	      return d.title;
+	    }).keys(function (d) {
+	      return [d.key];
+	    });
+	    var lastPointerUpType;
+	    var buttons = selection.selectAll('button').data(zooms).enter().append('button').attr('class', function (d) {
+	      return d.id;
+	    }).on('pointerup.editor', function (d3_event) {
+	      lastPointerUpType = d3_event.pointerType;
+	    }).on('click.editor', function (d3_event, d) {
+	      if (!d.disabled()) {
+	        d.action(d3_event);
+	      } else if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+	        context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass('disabled').label(d.disabledTitle)();
+	      }
+
+	      lastPointerUpType = null;
+	    }).call(tooltipBehavior);
+	    buttons.each(function (d) {
+	      select(this).call(svgIcon('#' + d.icon, 'light'));
+	    });
+	    utilKeybinding.plusKeys.forEach(function (key) {
+	      context.keybinding().on([key], zoomIn);
+	      context.keybinding().on([uiCmd('⌥' + key)], zoomInFurther);
+	    });
+	    utilKeybinding.minusKeys.forEach(function (key) {
+	      context.keybinding().on([key], zoomOut);
+	      context.keybinding().on([uiCmd('⌥' + key)], zoomOutFurther);
+	    });
 
-	        var box = selection.selectAll('.box')
-	            .data([0]);
+	    function updateButtonStates() {
+	      buttons.classed('disabled', function (d) {
+	        return d.disabled();
+	      }).each(function () {
+	        var selection = select(this);
 
-	        var boxEnter = box.enter()
-	            .append('div')
-	            .attr('class', 'box');
+	        if (!selection.select('.tooltip.in').empty()) {
+	          selection.call(tooltipBehavior.updateContent);
+	        }
+	      });
+	    }
 
-	        boxEnter
-	            .append('div')
-	            .call(svgIcon('#iD-icon-apply', 'pre-text'));
+	    updateButtonStates();
+	    context.map().on('move.uiZoom', updateButtonStates);
+	  };
+	}
 
-	        var noIssuesMessage = boxEnter
-	            .append('span');
+	function uiZoomToSelection(context) {
+	  function isDisabled() {
+	    var mode = context.mode();
+	    return !mode || !mode.zoomToSelected;
+	  }
 
-	        noIssuesMessage
-	            .append('strong')
-	            .attr('class', 'message');
+	  var _lastPointerUpType;
 
-	        noIssuesMessage
-	            .append('br');
+	  function pointerup(d3_event) {
+	    _lastPointerUpType = d3_event.pointerType;
+	  }
 
-	        noIssuesMessage
-	            .append('span')
-	            .attr('class', 'details');
+	  function click(d3_event) {
+	    d3_event.preventDefault();
 
-	        renderIgnoredIssuesReset(selection);
-	        setNoIssuesText(selection);
-	    }
+	    if (isDisabled()) {
+	      if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
+	        context.ui().flash.duration(2000).iconName('#iD-icon-framed-dot').iconClass('disabled').label(_t.html('inspector.zoom_to.no_selection'))();
+	      }
+	    } else {
+	      var mode = context.mode();
 
-	    function renderIgnoredIssuesReset(selection) {
+	      if (mode && mode.zoomToSelected) {
+	        mode.zoomToSelected();
+	      }
+	    }
 
-	        var ignoredIssues = context.validator()
-	            .getIssues({ what: 'all', where: 'all', includeDisabledRules: true, includeIgnored: 'only' });
+	    _lastPointerUpType = null;
+	  }
 
-	        var resetIgnored = selection.selectAll('.reset-ignored')
-	            .data(ignoredIssues.length ? [0] : []);
+	  return function (selection) {
+	    var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function () {
+	      if (isDisabled()) {
+	        return _t.html('inspector.zoom_to.no_selection');
+	      }
 
-	        // exit
-	        resetIgnored.exit()
-	            .remove();
+	      return _t.html('inspector.zoom_to.title');
+	    }).keys([_t('inspector.zoom_to.key')]);
+	    var button = selection.append('button').on('pointerup', pointerup).on('click', click).call(svgIcon('#iD-icon-framed-dot', 'light')).call(tooltipBehavior);
 
-	        // enter
-	        var resetIgnoredEnter = resetIgnored.enter()
-	            .append('div')
-	            .attr('class', 'reset-ignored section-footer');
+	    function setEnabledState() {
+	      button.classed('disabled', isDisabled());
 
-	        resetIgnoredEnter
-	            .append('a')
-	            .attr('href', '#');
+	      if (!button.select('.tooltip.in').empty()) {
+	        button.call(tooltipBehavior.updateContent);
+	      }
+	    }
 
-	        // update
-	        resetIgnored = resetIgnored
-	            .merge(resetIgnoredEnter);
+	    context.on('enter.uiZoomToSelection', setEnabledState);
+	    setEnabledState();
+	  };
+	}
 
-	        resetIgnored.select('a')
-	            .text(_t('issues.reset_ignored', { count: ignoredIssues.length.toString() }));
+	function uiPane(id, context) {
+	  var _key;
 
-	        resetIgnored.on('click', function() {
-	            context.validator().resetIgnoredIssues();
-	        });
-	    }
+	  var _label = '';
+	  var _description = '';
+	  var _iconName = '';
 
-	    function setNoIssuesText(selection) {
+	  var _sections; // array of uiSection objects
 
-	        var opts = getOptions();
 
-	        function checkForHiddenIssues(cases) {
-	            for (var type in cases) {
-	                var hiddenOpts = cases[type];
-	                var hiddenIssues = context.validator().getIssues(hiddenOpts);
-	                if (hiddenIssues.length) {
-	                    selection.select('.box .details')
-	                        .text(_t(
-	                            'issues.no_issues.hidden_issues.' + type,
-	                            { count: hiddenIssues.length.toString() }
-	                        ));
-	                    return;
-	                }
-	            }
-	            selection.select('.box .details')
-	                .text(_t('issues.no_issues.hidden_issues.none'));
-	        }
+	  var _paneSelection = select(null);
 
-	        var messageType;
+	  var _paneTooltip;
 
-	        if (opts.what === 'edited' && opts.where === 'visible') {
+	  var pane = {
+	    id: id
+	  };
 
-	            messageType = 'edits_in_view';
+	  pane.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = val;
+	    return pane;
+	  };
 
-	            checkForHiddenIssues({
-	                elsewhere: { what: 'edited', where: 'all' },
-	                everything_else: { what: 'all', where: 'visible' },
-	                disabled_rules: { what: 'edited', where: 'visible', includeDisabledRules: 'only' },
-	                everything_else_elsewhere: { what: 'all', where: 'all' },
-	                disabled_rules_elsewhere: { what: 'edited', where: 'all', includeDisabledRules: 'only' },
-	                ignored_issues: { what: 'edited', where: 'visible', includeIgnored: 'only' },
-	                ignored_issues_elsewhere: { what: 'edited', where: 'all', includeIgnored: 'only' }
-	            });
+	  pane.key = function (val) {
+	    if (!arguments.length) return _key;
+	    _key = val;
+	    return pane;
+	  };
 
-	        } else if (opts.what === 'edited' && opts.where === 'all') {
+	  pane.description = function (val) {
+	    if (!arguments.length) return _description;
+	    _description = val;
+	    return pane;
+	  };
 
-	            messageType = 'edits';
+	  pane.iconName = function (val) {
+	    if (!arguments.length) return _iconName;
+	    _iconName = val;
+	    return pane;
+	  };
 
-	            checkForHiddenIssues({
-	                everything_else: { what: 'all', where: 'all' },
-	                disabled_rules: { what: 'edited', where: 'all', includeDisabledRules: 'only' },
-	                ignored_issues: { what: 'edited', where: 'all', includeIgnored: 'only' }
-	            });
+	  pane.sections = function (val) {
+	    if (!arguments.length) return _sections;
+	    _sections = val;
+	    return pane;
+	  };
 
-	        } else if (opts.what === 'all' && opts.where === 'visible') {
+	  pane.selection = function () {
+	    return _paneSelection;
+	  };
 
-	            messageType = 'everything_in_view';
+	  function hidePane() {
+	    context.ui().togglePanes();
+	  }
 
-	            checkForHiddenIssues({
-	                elsewhere: { what: 'all', where: 'all' },
-	                disabled_rules: { what: 'all', where: 'visible', includeDisabledRules: 'only' },
-	                disabled_rules_elsewhere: { what: 'all', where: 'all', includeDisabledRules: 'only' },
-	                ignored_issues: { what: 'all', where: 'visible', includeIgnored: 'only' },
-	                ignored_issues_elsewhere: { what: 'all', where: 'all', includeIgnored: 'only' }
-	            });
-	        } else if (opts.what === 'all' && opts.where === 'all') {
+	  pane.togglePane = function (d3_event) {
+	    if (d3_event) d3_event.preventDefault();
 
-	            messageType = 'everything';
+	    _paneTooltip.hide();
 
-	            checkForHiddenIssues({
-	                disabled_rules: { what: 'all', where: 'all', includeDisabledRules: 'only' },
-	                ignored_issues: { what: 'all', where: 'all', includeIgnored: 'only' }
-	            });
-	        }
+	    context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
+	  };
 
-	        if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
-	            messageType = 'no_edits';
-	        }
+	  pane.renderToggleButton = function (selection) {
+	    if (!_paneTooltip) {
+	      _paneTooltip = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_description).keys([_key]);
+	    }
 
-	        selection.select('.box .message')
-	            .text(_t('issues.no_issues.message.' + messageType));
+	    selection.append('button').on('click', pane.togglePane).call(svgIcon('#' + _iconName, 'light')).call(_paneTooltip);
+	  };
 
+	  pane.renderContent = function (selection) {
+	    // override to fully customize content
+	    if (_sections) {
+	      _sections.forEach(function (section) {
+	        selection.call(section.render);
+	      });
 	    }
+	  };
 
-	    context.validator().on('validated.uiSectionValidationStatus', function() {
-	        window.requestIdleCallback(section.reRender);
-	    });
+	  pane.renderPane = function (selection) {
+	    _paneSelection = selection.append('div').attr('class', 'fillL map-pane hide ' + id + '-pane').attr('pane', id);
 
-	    context.map().on('move.uiSectionValidationStatus',
-	        debounce(function() {
-	            window.requestIdleCallback(section.reRender);
-	        }, 1000)
-	    );
+	    var heading = _paneSelection.append('div').attr('class', 'pane-heading');
 
-	    return section;
-	}
+	    heading.append('h2').html(_label);
+	    heading.append('button').on('click', hidePane).call(svgIcon('#iD-icon-close'));
 
-	function uiPaneIssues(context) {
+	    _paneSelection.append('div').attr('class', 'pane-content').call(pane.renderContent);
 
-	    var issuesPane = uiPane('issues', context)
-	        .key(_t('issues.key'))
-	        .title(_t('issues.title'))
-	        .description(_t('issues.title'))
-	        .iconName('iD-icon-alert')
-	        .sections([
-	            uiSectionValidationOptions(context),
-	            uiSectionValidationStatus(context),
-	            uiSectionValidationIssues('issues-errors', 'error', context),
-	            uiSectionValidationIssues('issues-warnings', 'warning', context),
-	            uiSectionValidationRules(context)
-	        ]);
+	    if (_key) {
+	      context.keybinding().on(_key, pane.togglePane);
+	    }
+	  };
 
-	    return issuesPane;
+	  return pane;
 	}
 
-	function uiSettingsCustomData(context) {
-	    var dispatch$1 = dispatch('change');
+	function uiSectionBackgroundDisplayOptions(context) {
+	  var section = uiSection('background-display-options', context).label(_t.html('background.display_options')).disclosureContent(renderDisclosureContent);
 
-	    function render(selection) {
-	        var dataLayer = context.layers().layer('data');
+	  var _detected = utilDetect();
 
-	        // keep separate copies of original and current settings
-	        var _origSettings = {
-	            fileList: (dataLayer && dataLayer.fileList()) || null,
-	            url: corePreferences('settings-custom-data-url')
-	        };
-	        var _currSettings = {
-	            fileList: (dataLayer && dataLayer.fileList()) || null,
-	            url: corePreferences('settings-custom-data-url')
-	        };
+	  var _storedOpacity = corePreferences('background-opacity');
 
-	        // var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
-	        var modal = uiConfirm(selection).okButton();
-
-	        modal
-	            .classed('settings-modal settings-custom-data', true);
-
-	        modal.select('.modal-section.header')
-	            .append('h3')
-	            .text(_t('settings.custom_data.header'));
-
-
-	        var textSection = modal.select('.modal-section.message-text');
-
-	        textSection
-	            .append('pre')
-	            .attr('class', 'instructions-file')
-	            .text(_t('settings.custom_data.file.instructions'));
-
-	        textSection
-	            .append('input')
-	            .attr('class', 'field-file')
-	            .attr('type', 'file')
-	            .property('files', _currSettings.fileList)  // works for all except IE11
-	            .on('change', function() {
-	                var files = event.target.files;
-	                if (files && files.length) {
-	                    _currSettings.url = '';
-	                    textSection.select('.field-url').property('value', '');
-	                    _currSettings.fileList = files;
-	                } else {
-	                    _currSettings.fileList = null;
-	                }
-	            });
+	  var _minVal = 0;
 
-	        textSection
-	            .append('h4')
-	            .text(_t('settings.custom_data.or'));
+	  var _maxVal = _detected.cssfilters ? 3 : 1;
 
-	        textSection
-	            .append('pre')
-	            .attr('class', 'instructions-url')
-	            .text(_t('settings.custom_data.url.instructions'));
+	  var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];
 
-	        textSection
-	            .append('textarea')
-	            .attr('class', 'field-url')
-	            .attr('placeholder', _t('settings.custom_data.url.placeholder'))
-	            .call(utilNoAuto)
-	            .property('value', _currSettings.url);
+	  var _options = {
+	    brightness: _storedOpacity !== null ? +_storedOpacity : 1,
+	    contrast: 1,
+	    saturation: 1,
+	    sharpness: 1
+	  };
+
+	  function clamp(x, min, max) {
+	    return Math.max(min, Math.min(x, max));
+	  }
 
+	  function updateValue(d, val) {
+	    val = clamp(val, _minVal, _maxVal);
+	    _options[d] = val;
+	    context.background()[d](val);
 
-	        // insert a cancel button
-	        var buttonSection = modal.select('.modal-section.buttons');
+	    if (d === 'brightness') {
+	      corePreferences('background-opacity', val);
+	    }
 
-	        buttonSection
-	            .insert('button', '.ok-button')
-	            .attr('class', 'button cancel-button secondary-action')
-	            .text(_t('confirm.cancel'));
+	    section.reRender();
+	  }
 
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.display-options-container').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'display-options-container controls-list'); // add slider controls
 
-	        buttonSection.select('.cancel-button')
-	            .on('click.cancel', clickCancel);
+	    var slidersEnter = containerEnter.selectAll('.display-control').data(_sliders).enter().append('div').attr('class', function (d) {
+	      return 'display-control display-control-' + d;
+	    });
+	    slidersEnter.append('h5').html(function (d) {
+	      return _t.html('background.' + d);
+	    }).append('span').attr('class', function (d) {
+	      return 'display-option-value display-option-value-' + d;
+	    });
+	    var sildersControlEnter = slidersEnter.append('div').attr('class', 'control-wrap');
+	    sildersControlEnter.append('input').attr('class', function (d) {
+	      return 'display-option-input display-option-input-' + d;
+	    }).attr('type', 'range').attr('min', _minVal).attr('max', _maxVal).attr('step', '0.05').on('input', function (d3_event, d) {
+	      var val = select(this).property('value');
+
+	      if (!val && d3_event && d3_event.target) {
+	        val = d3_event.target.value;
+	      }
 
-	        buttonSection.select('.ok-button')
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.save', clickSave);
+	      updateValue(d, val);
+	    });
+	    sildersControlEnter.append('button').attr('title', _t('background.reset')).attr('class', function (d) {
+	      return 'display-option-reset display-option-reset-' + d;
+	    }).on('click', function (d3_event, d) {
+	      if (d3_event.button !== 0) return;
+	      updateValue(d, 1);
+	    }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo'))); // reset all button
+
+	    containerEnter.append('a').attr('class', 'display-option-resetlink').attr('href', '#').html(_t.html('background.reset_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+
+	      for (var i = 0; i < _sliders.length; i++) {
+	        updateValue(_sliders[i], 1);
+	      }
+	    }); // update
 
+	    container = containerEnter.merge(container);
+	    container.selectAll('.display-option-input').property('value', function (d) {
+	      return _options[d];
+	    });
+	    container.selectAll('.display-option-value').html(function (d) {
+	      return Math.floor(_options[d] * 100) + '%';
+	    });
+	    container.selectAll('.display-option-reset').classed('disabled', function (d) {
+	      return _options[d] === 1;
+	    }); // first time only, set brightness if needed
 
-	        function isSaveDisabled() {
-	            return null;
-	        }
+	    if (containerEnter.size() && _options.brightness !== 1) {
+	      context.background().brightness(_options.brightness);
+	    }
+	  }
 
+	  return section;
+	}
 
-	        // restore the original url
-	        function clickCancel() {
-	            textSection.select('.field-url').property('value', _origSettings.url);
-	            corePreferences('settings-custom-data-url', _origSettings.url);
-	            this.blur();
-	            modal.close();
-	        }
+	function uiSettingsCustomBackground() {
+	  var dispatch$1 = dispatch('change');
+
+	  function render(selection) {
+	    // keep separate copies of original and current settings
+	    var _origSettings = {
+	      template: corePreferences('background-custom-template')
+	    };
+	    var _currSettings = {
+	      template: corePreferences('background-custom-template')
+	    };
+	    var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
+	    var modal = uiConfirm(selection).okButton();
+	    modal.classed('settings-modal settings-custom-background', true);
+	    modal.select('.modal-section.header').append('h3').html(_t.html('settings.custom_background.header'));
+	    var textSection = modal.select('.modal-section.message-text');
+	    var instructions = "".concat(_t.html('settings.custom_background.instructions.info'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.wms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.proj'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.wkid'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.dimensions'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.bbox'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.tms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.xyz'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.flipped_y'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.switch'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.quadtile'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.scale_factor'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.example'), "\n") + "`".concat(example, "`");
+	    textSection.append('div').attr('class', 'instructions-template').html(marked_1(instructions));
+	    textSection.append('textarea').attr('class', 'field-template').attr('placeholder', _t('settings.custom_background.template.placeholder')).call(utilNoAuto).property('value', _currSettings.template); // insert a cancel button
+
+	    var buttonSection = modal.select('.modal-section.buttons');
+	    buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
+	    buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
+	    buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
+
+	    function isSaveDisabled() {
+	      return null;
+	    } // restore the original template
 
-	        // accept the current url
-	        function clickSave() {
-	            _currSettings.url = textSection.select('.field-url').property('value').trim();
 
-	            // one or the other but not both
-	            if (_currSettings.url) { _currSettings.fileList = null; }
-	            if (_currSettings.fileList) { _currSettings.url = ''; }
+	    function clickCancel() {
+	      textSection.select('.field-template').property('value', _origSettings.template);
+	      corePreferences('background-custom-template', _origSettings.template);
+	      this.blur();
+	      modal.close();
+	    } // accept the current template
 
-	            corePreferences('settings-custom-data-url', _currSettings.url);
-	            this.blur();
-	            modal.close();
-	            dispatch$1.call('change', this, _currSettings);
-	        }
+
+	    function clickSave() {
+	      _currSettings.template = textSection.select('.field-template').property('value');
+	      corePreferences('background-custom-template', _currSettings.template);
+	      this.blur();
+	      modal.close();
+	      dispatch$1.call('change', this, _currSettings);
 	    }
+	  }
 
-	    return utilRebind(render, dispatch$1, 'on');
+	  return utilRebind(render, dispatch$1, 'on');
 	}
 
-	function uiSectionDataLayers(context) {
+	function uiSectionBackgroundList(context) {
+	  var _backgroundList = select(null);
 
-	    var settingsCustomData = uiSettingsCustomData(context)
-	        .on('change', customChanged);
+	  var _customSource = context.background().findSource('custom');
 
-	    var layers = context.layers();
+	  var _settingsCustomBackground = uiSettingsCustomBackground().on('change', customChanged);
 
-	    var section = uiSection('data-layers', context)
-	        .title(_t('map_data.data_layers'))
-	        .disclosureContent(renderDisclosureContent);
+	  var section = uiSection('background-list', context).label(_t.html('background.backgrounds')).disclosureContent(renderDisclosureContent);
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.data-layer-container')
-	            .data([0]);
+	  function previousBackgroundID() {
+	    return corePreferences('background-last-used-toggle');
+	  }
 
-	        container.enter()
-	            .append('div')
-	            .attr('class', 'data-layer-container')
-	            .merge(container)
-	            .call(drawOsmItems)
-	            .call(drawQAItems)
-	            .call(drawCustomDataItems)
-	            .call(drawVectorItems)      // Beta - Detroit mapping challenge
-	            .call(drawPanelItems);
-	    }
+	  function renderDisclosureContent(selection) {
+	    // the background list
+	    var container = selection.selectAll('.layer-background-list').data([0]);
+	    _backgroundList = container.enter().append('ul').attr('class', 'layer-list layer-background-list').attr('dir', 'auto').merge(container); // add minimap toggle below list
 
-	    function showsLayer(which) {
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            return layer.enabled();
-	        }
-	        return false;
-	    }
+	    var bgExtrasListEnter = selection.selectAll('.bg-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list bg-extras-list');
+	    var minimapLabelEnter = bgExtrasListEnter.append('li').attr('class', 'minimap-toggle-item').append('label').call(uiTooltip().title(_t.html('background.minimap.tooltip')).keys([_t('background.minimap.key')]).placement('top'));
+	    minimapLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      uiMapInMap.toggle();
+	    });
+	    minimapLabelEnter.append('span').html(_t.html('background.minimap.description'));
+	    var panelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'background-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.background.key'))]).placement('top'));
+	    panelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.ui().info.toggle('background');
+	    });
+	    panelLabelEnter.append('span').html(_t.html('background.panel.description'));
+	    var locPanelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'location-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.location_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.location.key'))]).placement('top'));
+	    locPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.ui().info.toggle('location');
+	    });
+	    locPanelLabelEnter.append('span').html(_t.html('background.location_panel.description')); // "Info / Report a Problem" link
 
-	    function setLayer(which, enabled) {
-	        // Don't allow layer changes while drawing - #6584
-	        var mode = context.mode();
-	        if (mode && /^draw/.test(mode.id)) { return; }
+	    selection.selectAll('.imagery-faq').data([0]).enter().append('div').attr('class', 'imagery-faq').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/develop/FAQ.md#how-can-i-report-an-issue-with-background-imagery').append('span').html(_t.html('background.imagery_problem_faq'));
 
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            layer.enabled(enabled);
+	    _backgroundList.call(drawListItems, 'radio', function (d3_event, d) {
+	      chooseBackground(d);
+	    }, function (d) {
+	      return !d.isHidden() && !d.overlay;
+	    });
+	  }
 
-	            if (!enabled && (which === 'osm' || which === 'notes')) {
-	                context.enter(modeBrowse(context));
-	            }
-	        }
-	    }
+	  function setTooltips(selection) {
+	    selection.each(function (d, i, nodes) {
+	      var item = select(this).select('label');
+	      var span = item.select('span');
+	      var placement = i < nodes.length / 2 ? 'bottom' : 'top';
+	      var description = d.description();
+	      var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
+	      item.call(uiTooltip().destroyAny);
 
-	    function toggleLayer(which) {
-	        setLayer(which, !showsLayer(which));
-	    }
+	      if (d.id === previousBackgroundID()) {
+	        item.call(uiTooltip().placement(placement).title('<div>' + _t.html('background.switch') + '</div>').keys([uiCmd('⌘' + _t('background.key'))]));
+	      } else if (description || isOverflowing) {
+	        item.call(uiTooltip().placement(placement).title(description || d.label()));
+	      }
+	    });
+	  }
 
-	    function drawOsmItems(selection) {
-	        var osmKeys = ['osm', 'notes'];
-	        var osmLayers = layers.all().filter(function(obj) { return osmKeys.indexOf(obj.id) !== -1; });
+	  function drawListItems(layerList, type, change, filter) {
+	    var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter).sort(function (a, b) {
+	      return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
+	    });
+	    var layerLinks = layerList.selectAll('li') // We have to be a bit inefficient about reordering the list since
+	    // arrow key navigation of radio values likes to work in the order
+	    // they were added, not the display document order.
+	    .data(sources, function (d, i) {
+	      return d.id + '---' + i;
+	    });
+	    layerLinks.exit().remove();
+	    var enter = layerLinks.enter().append('li').classed('layer-custom', function (d) {
+	      return d.id === 'custom';
+	    }).classed('best', function (d) {
+	      return d.best();
+	    });
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', 'background-layer').attr('value', function (d) {
+	      return d.id;
+	    }).on('change', change);
+	    label.append('span').html(function (d) {
+	      return d.label();
+	    });
+	    enter.filter(function (d) {
+	      return d.id === 'custom';
+	    }).append('button').attr('class', 'layer-browse').call(uiTooltip().title(_t.html('settings.custom_background.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', editCustom).call(svgIcon('#iD-icon-more'));
+	    enter.filter(function (d) {
+	      return d.best();
+	    }).append('div').attr('class', 'best').call(uiTooltip().title(_t.html('background.best_imagery')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).append('span').html('&#9733;');
+	    layerList.call(updateLayerSelections);
+	  }
 
-	        var ul = selection
-	            .selectAll('.layer-list-osm')
-	            .data([0]);
+	  function updateLayerSelections(selection) {
+	    function active(d) {
+	      return context.background().showsLayer(d);
+	    }
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-osm')
-	            .merge(ul);
+	    selection.selectAll('li').classed('active', active).classed('switch', function (d) {
+	      return d.id === previousBackgroundID();
+	    }).call(setTooltips).selectAll('input').property('checked', active);
+	  }
 
-	        var li = ul.selectAll('.list-item')
-	            .data(osmLayers);
+	  function chooseBackground(d) {
+	    if (d.id === 'custom' && !d.template()) {
+	      return editCustom();
+	    }
 
-	        li.exit()
-	            .remove();
+	    var previousBackground = context.background().baseLayerSource();
+	    corePreferences('background-last-used-toggle', previousBackground.id);
+	    corePreferences('background-last-used', d.id);
+	    context.background().baseLayerSource(d);
+	  }
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'list-item list-item-' + d.id; });
+	  function customChanged(d) {
+	    if (d && d.template) {
+	      _customSource.template(d.template);
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                if (d.id === 'osm') {
-	                    select(this)
-	                        .call(uiTooltip()
-	                            .title(_t('map_data.layers.' + d.id + '.tooltip'))
-	                            .keys([uiCmd('⌥' + _t('area_fill.wireframe.key'))])
-	                            .placement('bottom')
-	                        );
-	                } else {
-	                    select(this)
-	                        .call(uiTooltip()
-	                            .title(_t('map_data.layers.' + d.id + '.tooltip'))
-	                            .placement('bottom')
-	                        );
-	                }
-	            });
+	      chooseBackground(_customSource);
+	    } else {
+	      _customSource.template('');
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) { toggleLayer(d.id); });
+	      chooseBackground(context.background().findSource('none'));
+	    }
+	  }
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) { return _t('map_data.layers.' + d.id + '.title'); });
+	  function editCustom(d3_event) {
+	    d3_event.preventDefault();
+	    context.container().call(_settingsCustomBackground);
+	  }
 
+	  context.background().on('change.background_list', function () {
+	    _backgroundList.call(updateLayerSelections);
+	  });
+	  context.map().on('move.background_list', debounce(function () {
+	    // layers in-view may have changed due to map move
+	    window.requestIdleCallback(section.reRender);
+	  }, 1000));
+	  return section;
+	}
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', function (d) { return d.layer.enabled(); })
-	            .selectAll('input')
-	            .property('checked', function (d) { return d.layer.enabled(); });
-	    }
+	function uiSectionBackgroundOffset(context) {
+	  var section = uiSection('background-offset', context).label(_t.html('background.fix_misalignment')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-	    function drawQAItems(selection) {
-	        var qaKeys = ['keepRight', 'improveOSM', 'osmose'];
-	        var qaLayers = layers.all().filter(function(obj) { return qaKeys.indexOf(obj.id) !== -1; });
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	        var ul = selection
-	            .selectAll('.layer-list-qa')
-	            .data([0]);
+	  var _directions = [['top', [0, -0.5]], ['left', [-0.5, 0]], ['right', [0.5, 0]], ['bottom', [0, 0.5]]];
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-qa')
-	            .merge(ul);
+	  function updateValue() {
+	    var meters = geoOffsetToMeters(context.background().offset());
+	    var x = +meters[0].toFixed(2);
+	    var y = +meters[1].toFixed(2);
+	    context.container().selectAll('.nudge-inner-rect').select('input').classed('error', false).property('value', x + ', ' + y);
+	    context.container().selectAll('.nudge-reset').classed('disabled', function () {
+	      return x === 0 && y === 0;
+	    });
+	  }
 
-	        var li = ul.selectAll('.list-item')
-	            .data(qaLayers);
+	  function resetOffset() {
+	    context.background().offset([0, 0]);
+	    updateValue();
+	  }
 
-	        li.exit()
-	            .remove();
+	  function nudge(d) {
+	    context.background().nudge(d, context.map().zoom());
+	    updateValue();
+	  }
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'list-item list-item-' + d.id; });
+	  function inputOffset() {
+	    var input = select(this);
+	    var d = input.node().value;
+	    if (d === '') return resetOffset();
+	    d = d.replace(/;/g, ',').split(',').map(function (n) {
+	      // if n is NaN, it will always get mapped to false.
+	      return !isNaN(n) && n;
+	    });
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiTooltip()
-	                        .title(_t('map_data.layers.' + d.id + '.tooltip'))
-	                        .placement('bottom')
-	                    );
-	            });
+	    if (d.length !== 2 || !d[0] || !d[1]) {
+	      input.classed('error', true);
+	      return;
+	    }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) { toggleLayer(d.id); });
+	    context.background().offset(geoMetersToOffset(d));
+	    updateValue();
+	  }
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) { return _t('map_data.layers.' + d.id + '.title'); });
+	  function dragOffset(d3_event) {
+	    if (d3_event.button !== 0) return;
+	    var origin = [d3_event.clientX, d3_event.clientY];
+	    var pointerId = d3_event.pointerId || 'mouse';
+	    context.container().append('div').attr('class', 'nudge-surface');
+	    select(window).on(_pointerPrefix + 'move.drag-bg-offset', pointermove).on(_pointerPrefix + 'up.drag-bg-offset', pointerup);
 
+	    if (_pointerPrefix === 'pointer') {
+	      select(window).on('pointercancel.drag-bg-offset', pointerup);
+	    }
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', function (d) { return d.layer.enabled(); })
-	            .selectAll('input')
-	            .property('checked', function (d) { return d.layer.enabled(); });
+	    function pointermove(d3_event) {
+	      if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      var latest = [d3_event.clientX, d3_event.clientY];
+	      var d = [-(origin[0] - latest[0]) / 4, -(origin[1] - latest[1]) / 4];
+	      origin = latest;
+	      nudge(d);
 	    }
 
-	    // Beta feature - sample vector layers to support Detroit Mapping Challenge
-	    // https://github.com/osmus/detroit-mapping-challenge
-	    function drawVectorItems(selection) {
-	        var dataLayer = layers.layer('data');
-	        var vtData = [
-	            {
-	                name: 'Detroit Neighborhoods/Parks',
-	                src: 'neighborhoods-parks',
-	                tooltip: 'Neighborhood boundaries and parks as compiled by City of Detroit in concert with community groups.',
-	                template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmur6x34562qp9iv1u3ksf-54hev,jonahadkins.cjksmqxdx33jj2wp90xd9x2md-4e5y2/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-	            }, {
-	                name: 'Detroit Composite POIs',
-	                src: 'composite-poi',
-	                tooltip: 'Fire Inspections, Business Licenses, and other public location data collated from the City of Detroit.',
-	                template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmm6a02sli31myxhsr7zf3-2sw8h/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-	            }, {
-	                name: 'Detroit All-The-Places POIs',
-	                src: 'alltheplaces-poi',
-	                tooltip: 'Public domain business location data created by web scrapers.',
-	                template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmswgk340g2vo06p1w9w0j-8fjjc/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-	            }
-	        ];
+	    function pointerup(d3_event) {
+	      if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      if (d3_event.button !== 0) return;
+	      context.container().selectAll('.nudge-surface').remove();
+	      select(window).on('.drag-bg-offset', null);
+	    }
+	  }
 
-	        // Only show this if the map is around Detroit..
-	        var detroit = geoExtent([-83.5, 42.1], [-82.8, 42.5]);
-	        var showVectorItems = (context.map().zoom() > 9 && detroit.contains(context.map().center()));
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.nudge-container').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'nudge-container');
+	    containerEnter.append('div').attr('class', 'nudge-instructions').html(_t.html('background.offset'));
+	    var nudgeWrapEnter = containerEnter.append('div').attr('class', 'nudge-controls-wrap');
+	    var nudgeEnter = nudgeWrapEnter.append('div').attr('class', 'nudge-outer-rect').on(_pointerPrefix + 'down', dragOffset);
+	    nudgeEnter.append('div').attr('class', 'nudge-inner-rect').append('input').attr('type', 'text').on('change', inputOffset);
+	    nudgeWrapEnter.append('div').selectAll('button').data(_directions).enter().append('button').attr('class', function (d) {
+	      return d[0] + ' nudge';
+	    }).on('click', function (d3_event, d) {
+	      nudge(d[1]);
+	    });
+	    nudgeWrapEnter.append('button').attr('title', _t('background.reset')).attr('class', 'nudge-reset disabled').on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      resetOffset();
+	    }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
+	    updateValue();
+	  }
 
-	        var container = selection.selectAll('.vectortile-container')
-	            .data(showVectorItems ? [0] : []);
+	  context.background().on('change.backgroundOffset-update', updateValue);
+	  return section;
+	}
 
-	        container.exit()
-	            .remove();
+	function uiSectionOverlayList(context) {
+	  var section = uiSection('overlay-list', context).label(_t.html('background.overlays')).disclosureContent(renderDisclosureContent);
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'vectortile-container');
+	  var _overlayList = select(null);
 
-	        containerEnter
-	            .append('h4')
-	            .attr('class', 'vectortile-header')
-	            .text('Detroit Vector Tiles (Beta)');
+	  function setTooltips(selection) {
+	    selection.each(function (d, i, nodes) {
+	      var item = select(this).select('label');
+	      var span = item.select('span');
+	      var placement = i < nodes.length / 2 ? 'bottom' : 'top';
+	      var description = d.description();
+	      var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
+	      item.call(uiTooltip().destroyAny);
 
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-vectortile');
+	      if (description || isOverflowing) {
+	        item.call(uiTooltip().placement(placement).title(description || d.name()));
+	      }
+	    });
+	  }
 
-	        containerEnter
-	            .append('div')
-	            .attr('class', 'vectortile-footer')
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-out-link', 'inline'))
-	            .attr('href', 'https://github.com/osmus/detroit-mapping-challenge')
-	            .append('span')
-	            .text('About these layers');
+	  function updateLayerSelections(selection) {
+	    function active(d) {
+	      return context.background().showsLayer(d);
+	    }
 
-	        container = container
-	            .merge(containerEnter);
+	    selection.selectAll('li').classed('active', active).call(setTooltips).selectAll('input').property('checked', active);
+	  }
 
+	  function chooseOverlay(d3_event, d) {
+	    d3_event.preventDefault();
+	    context.background().toggleOverlayLayer(d);
 
-	        var ul = container.selectAll('.layer-list-vectortile');
+	    _overlayList.call(updateLayerSelections);
 
-	        var li = ul.selectAll('.list-item')
-	            .data(vtData);
+	    document.activeElement.blur();
+	  }
 
-	        li.exit()
-	            .remove();
+	  function drawListItems(layerList, type, change, filter) {
+	    var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter);
+	    var layerLinks = layerList.selectAll('li').data(sources, function (d) {
+	      return d.name();
+	    });
+	    layerLinks.exit().remove();
+	    var enter = layerLinks.enter().append('li');
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', 'layers').on('change', change);
+	    label.append('span').html(function (d) {
+	      return d.label();
+	    });
+	    layerList.selectAll('li').sort(sortSources);
+	    layerList.call(updateLayerSelections);
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'list-item list-item-' + d.src; });
+	    function sortSources(a, b) {
+	      return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
+	    }
+	  }
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                select(this).call(
-	                    uiTooltip().title(d.tooltip).placement('top')
-	                );
-	            });
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.layer-overlay-list').data([0]);
+	    _overlayList = container.enter().append('ul').attr('class', 'layer-list layer-overlay-list').attr('dir', 'auto').merge(container);
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', 'vectortile')
-	            .on('change', selectVTLayer);
+	    _overlayList.call(drawListItems, 'checkbox', chooseOverlay, function (d) {
+	      return !d.isHidden() && d.overlay;
+	    });
+	  }
+
+	  context.map().on('move.overlay_list', debounce(function () {
+	    // layers in-view may have changed due to map move
+	    window.requestIdleCallback(section.reRender);
+	  }, 1000));
+	  return section;
+	}
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) { return d.name; });
+	function uiPaneBackground(context) {
+	  var backgroundPane = uiPane('background', context).key(_t('background.key')).label(_t.html('background.title')).description(_t.html('background.description')).iconName('iD-icon-layers').sections([uiSectionBackgroundList(context), uiSectionOverlayList(context), uiSectionBackgroundDisplayOptions(context), uiSectionBackgroundOffset(context)]);
+	  return backgroundPane;
+	}
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', isVTLayerSelected)
-	            .selectAll('input')
-	            .property('checked', isVTLayerSelected);
+	function uiPaneHelp(context) {
+	  var docKeys = [['help', ['welcome', 'open_data_h', 'open_data', 'before_start_h', 'before_start', 'open_source_h', 'open_source', 'open_source_help']], ['overview', ['navigation_h', 'navigation_drag', 'navigation_zoom', 'features_h', 'features', 'nodes_ways']], ['editing', ['select_h', 'select_left_click', 'select_right_click', 'select_space', 'multiselect_h', 'multiselect', 'multiselect_shift_click', 'multiselect_lasso', 'undo_redo_h', 'undo_redo', 'save_h', 'save', 'save_validation', 'upload_h', 'upload', 'backups_h', 'backups', 'keyboard_h', 'keyboard']], ['feature_editor', ['intro', 'definitions', 'type_h', 'type', 'type_picker', 'fields_h', 'fields_all_fields', 'fields_example', 'fields_add_field', 'tags_h', 'tags_all_tags', 'tags_resources']], ['points', ['intro', 'add_point_h', 'add_point', 'add_point_finish', 'move_point_h', 'move_point', 'delete_point_h', 'delete_point', 'delete_point_command']], ['lines', ['intro', 'add_line_h', 'add_line', 'add_line_draw', 'add_line_continue', 'add_line_finish', 'modify_line_h', 'modify_line_dragnode', 'modify_line_addnode', 'connect_line_h', 'connect_line', 'connect_line_display', 'connect_line_drag', 'connect_line_tag', 'disconnect_line_h', 'disconnect_line_command', 'move_line_h', 'move_line_command', 'move_line_connected', 'delete_line_h', 'delete_line', 'delete_line_command']], ['areas', ['intro', 'point_or_area_h', 'point_or_area', 'add_area_h', 'add_area_command', 'add_area_draw', 'add_area_continue', 'add_area_finish', 'square_area_h', 'square_area_command', 'modify_area_h', 'modify_area_dragnode', 'modify_area_addnode', 'delete_area_h', 'delete_area', 'delete_area_command']], ['relations', ['intro', 'edit_relation_h', 'edit_relation', 'edit_relation_add', 'edit_relation_delete', 'maintain_relation_h', 'maintain_relation', 'relation_types_h', 'multipolygon_h', 'multipolygon', 'multipolygon_create', 'multipolygon_merge', 'turn_restriction_h', 'turn_restriction', 'turn_restriction_field', 'turn_restriction_editing', 'route_h', 'route', 'route_add', 'boundary_h', 'boundary', 'boundary_add']], ['operations', ['intro', 'intro_2', 'straighten', 'orthogonalize', 'circularize', 'move', 'rotate', 'reflect', 'continue', 'reverse', 'disconnect', 'split', 'extract', 'merge', 'delete', 'downgrade', 'copy_paste']], ['notes', ['intro', 'add_note_h', 'add_note', 'place_note', 'move_note', 'update_note_h', 'update_note', 'save_note_h', 'save_note']], ['imagery', ['intro', 'sources_h', 'choosing', 'sources', 'offsets_h', 'offset', 'offset_change']], ['streetlevel', ['intro', 'using_h', 'using', 'photos', 'viewer']], ['gps', ['intro', 'survey', 'using_h', 'using', 'tracing', 'upload']], ['qa', ['intro', 'tools_h', 'tools', 'issues_h', 'issues']]];
+	  var headings = {
+	    'help.help.open_data_h': 3,
+	    'help.help.before_start_h': 3,
+	    'help.help.open_source_h': 3,
+	    'help.overview.navigation_h': 3,
+	    'help.overview.features_h': 3,
+	    'help.editing.select_h': 3,
+	    'help.editing.multiselect_h': 3,
+	    'help.editing.undo_redo_h': 3,
+	    'help.editing.save_h': 3,
+	    'help.editing.upload_h': 3,
+	    'help.editing.backups_h': 3,
+	    'help.editing.keyboard_h': 3,
+	    'help.feature_editor.type_h': 3,
+	    'help.feature_editor.fields_h': 3,
+	    'help.feature_editor.tags_h': 3,
+	    'help.points.add_point_h': 3,
+	    'help.points.move_point_h': 3,
+	    'help.points.delete_point_h': 3,
+	    'help.lines.add_line_h': 3,
+	    'help.lines.modify_line_h': 3,
+	    'help.lines.connect_line_h': 3,
+	    'help.lines.disconnect_line_h': 3,
+	    'help.lines.move_line_h': 3,
+	    'help.lines.delete_line_h': 3,
+	    'help.areas.point_or_area_h': 3,
+	    'help.areas.add_area_h': 3,
+	    'help.areas.square_area_h': 3,
+	    'help.areas.modify_area_h': 3,
+	    'help.areas.delete_area_h': 3,
+	    'help.relations.edit_relation_h': 3,
+	    'help.relations.maintain_relation_h': 3,
+	    'help.relations.relation_types_h': 2,
+	    'help.relations.multipolygon_h': 3,
+	    'help.relations.turn_restriction_h': 3,
+	    'help.relations.route_h': 3,
+	    'help.relations.boundary_h': 3,
+	    'help.notes.add_note_h': 3,
+	    'help.notes.update_note_h': 3,
+	    'help.notes.save_note_h': 3,
+	    'help.imagery.sources_h': 3,
+	    'help.imagery.offsets_h': 3,
+	    'help.streetlevel.using_h': 3,
+	    'help.gps.using_h': 3,
+	    'help.qa.tools_h': 3,
+	    'help.qa.issues_h': 3
+	  }; // For each section, squash all the texts into a single markdown document
+
+	  var docs = docKeys.map(function (key) {
+	    var helpkey = 'help.' + key[0];
+	    var helpPaneReplacements = {
+	      version: context.version
+	    };
+	    var text = key[1].reduce(function (all, part) {
+	      var subkey = helpkey + '.' + part;
+	      var depth = headings[subkey]; // is this subkey a heading?
+
+	      var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
+
+	      return all + hhh + helpHtml(subkey, helpPaneReplacements) + '\n\n';
+	    }, '');
+	    return {
+	      title: _t.html(helpkey + '.title'),
+	      content: marked_1(text.trim()) // use keyboard key styling for shortcuts
+	      .replace(/<code>/g, '<kbd>').replace(/<\/code>/g, '<\/kbd>')
+	    };
+	  });
+	  var helpPane = uiPane('help', context).key(_t('help.key')).label(_t.html('help.title')).description(_t.html('help.title')).iconName('iD-icon-help');
+
+	  helpPane.renderContent = function (content) {
+	    function clickHelp(d, i) {
+	      var rtl = _mainLocalizer.textDirection() === 'rtl';
+	      content.property('scrollTop', 0);
+	      helpPane.selection().select('.pane-heading h2').html(d.title);
+	      body.html(d.content);
+	      body.selectAll('a').attr('target', '_blank');
+	      menuItems.classed('selected', function (m) {
+	        return m.title === d.title;
+	      });
+	      nav.html('');
 
+	      if (rtl) {
+	        nav.call(drawNext).call(drawPrevious);
+	      } else {
+	        nav.call(drawPrevious).call(drawNext);
+	      }
 
-	        function isVTLayerSelected(d) {
-	            return dataLayer && dataLayer.template() === d.template;
+	      function drawNext(selection) {
+	        if (i < docs.length - 1) {
+	          var nextLink = selection.append('a').attr('href', '#').attr('class', 'next').on('click', function (d3_event) {
+	            d3_event.preventDefault();
+	            clickHelp(docs[i + 1], i + 1);
+	          });
+	          nextLink.append('span').html(docs[i + 1].title).call(svgIcon(rtl ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
 	        }
+	      }
 
-	        function selectVTLayer(d) {
-	            corePreferences('settings-custom-data-url', d.template);
-	            if (dataLayer) {
-	                dataLayer.template(d.template, d.src);
-	                dataLayer.enabled(true);
-	            }
+	      function drawPrevious(selection) {
+	        if (i > 0) {
+	          var prevLink = selection.append('a').attr('href', '#').attr('class', 'previous').on('click', function (d3_event) {
+	            d3_event.preventDefault();
+	            clickHelp(docs[i - 1], i - 1);
+	          });
+	          prevLink.call(svgIcon(rtl ? '#iD-icon-forward' : '#iD-icon-backward', 'inline')).append('span').html(docs[i - 1].title);
 	        }
+	      }
 	    }
 
-	    function drawCustomDataItems(selection) {
-	        var dataLayer = layers.layer('data');
-	        var hasData = dataLayer && dataLayer.hasData();
-	        var showsData = hasData && dataLayer.enabled();
-
-	        var ul = selection
-	            .selectAll('.layer-list-data')
-	            .data(dataLayer ? [0] : []);
+	    function clickWalkthrough(d3_event) {
+	      d3_event.preventDefault();
+	      if (context.inIntro()) return;
+	      context.container().call(uiIntro(context));
+	      context.ui().togglePanes();
+	    }
 
-	        // Exit
-	        ul.exit()
-	            .remove();
+	    function clickShortcuts(d3_event) {
+	      d3_event.preventDefault();
+	      context.container().call(context.ui().shortcuts, true);
+	    }
 
-	        // Enter
-	        var ulEnter = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-data');
+	    var toc = content.append('ul').attr('class', 'toc');
+	    var menuItems = toc.selectAll('li').data(docs).enter().append('li').append('a').attr('href', '#').html(function (d) {
+	      return d.title;
+	    }).on('click', function (d3_event, d) {
+	      d3_event.preventDefault();
+	      clickHelp(d, docs.indexOf(d));
+	    });
+	    var shortcuts = toc.append('li').attr('class', 'shortcuts').call(uiTooltip().title(_t.html('shortcuts.tooltip')).keys(['?']).placement('top')).append('a').attr('href', '#').on('click', clickShortcuts);
+	    shortcuts.append('div').html(_t.html('shortcuts.title'));
+	    var walkthrough = toc.append('li').attr('class', 'walkthrough').append('a').attr('href', '#').on('click', clickWalkthrough);
+	    walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+	    walkthrough.append('div').html(_t.html('splash.walkthrough'));
+	    var helpContent = content.append('div').attr('class', 'left-content');
+	    var body = helpContent.append('div').attr('class', 'body');
+	    var nav = helpContent.append('div').attr('class', 'nav');
+	    clickHelp(docs[0], 0);
+	  };
 
-	        var liEnter = ulEnter
-	            .append('li')
-	            .attr('class', 'list-item-data');
+	  return helpPane;
+	}
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('map_data.layers.custom.tooltip'))
-	                .placement('top')
-	            );
+	function uiSectionValidationIssues(id, severity, context) {
+	  var _issues = [];
+	  var section = uiSection(id, context).label(function () {
+	    if (!_issues) return '';
+	    var issueCountText = _issues.length > 1000 ? '1000+' : String(_issues.length);
+	    return _t('inspector.title_count', {
+	      title: _t.html('issues.' + severity + 's.list_title'),
+	      count: issueCountText
+	    });
+	  }).disclosureContent(renderDisclosureContent).shouldDisplay(function () {
+	    return _issues && _issues.length;
+	  });
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() { toggleLayer('data'); });
+	  function getOptions() {
+	    return {
+	      what: corePreferences('validate-what') || 'edited',
+	      where: corePreferences('validate-where') || 'all'
+	    };
+	  } // get and cache the issues to display, unordered
 
-	        labelEnter
-	            .append('span')
-	            .text(_t('map_data.layers.custom.title'));
 
-	        liEnter
-	            .append('button')
-	            .call(uiTooltip()
-	                .title(_t('settings.custom_data.tooltip'))
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            )
-	            .on('click', editCustom)
-	            .call(svgIcon('#iD-icon-more'));
+	  function reloadIssues() {
+	    _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
+	  }
 
-	        liEnter
-	            .append('button')
-	            .call(uiTooltip()
-	                .title(_t('map_data.layers.custom.zoom'))
-	                .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-	            )
-	            .on('click', function() {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                dataLayer.fitZoom();
-	            })
-	            .call(svgIcon('#iD-icon-framed-dot'));
+	  function renderDisclosureContent(selection) {
+	    var center = context.map().center();
+	    var graph = context.graph(); // sort issues by distance away from the center of the map
 
-	        // Update
-	        ul = ul
-	            .merge(ulEnter);
+	    var issues = _issues.map(function withDistance(issue) {
+	      var extent = issue.extent(graph);
+	      var dist = extent ? geoSphericalDistance(center, extent.center()) : 0;
+	      return Object.assign(issue, {
+	        dist: dist
+	      });
+	    }).sort(function byDistance(a, b) {
+	      return a.dist - b.dist;
+	    }); // cut off at 1000
 
-	        ul.selectAll('.list-item-data')
-	            .classed('active', showsData)
-	            .selectAll('label')
-	            .classed('deemphasize', !hasData)
-	            .selectAll('input')
-	            .property('disabled', !hasData)
-	            .property('checked', showsData);
-	    }
 
-	    function editCustom() {
-	        event.preventDefault();
-	        context.container()
-	            .call(settingsCustomData);
-	    }
+	    issues = issues.slice(0, 1000); //renderIgnoredIssuesReset(_warningsSelection);
 
-	    function customChanged(d) {
-	        var dataLayer = layers.layer('data');
+	    selection.call(drawIssuesList, issues);
+	  }
 
-	        if (d && d.url) {
-	            dataLayer.url(d.url);
-	        } else if (d && d.fileList) {
-	            dataLayer.fileList(d.fileList);
-	        }
-	    }
+	  function drawIssuesList(selection, issues) {
+	    var list = selection.selectAll('.issues-list').data([0]);
+	    list = list.enter().append('ul').attr('class', 'layer-list issues-list ' + severity + 's-list').merge(list);
+	    var items = list.selectAll('li').data(issues, function (d) {
+	      return d.id;
+	    }); // Exit
 
+	    items.exit().remove(); // Enter
 
-	    function drawPanelItems(selection) {
+	    var itemsEnter = items.enter().append('li').attr('class', function (d) {
+	      return 'issue severity-' + d.severity;
+	    }).on('click', function (d3_event, d) {
+	      context.validator().focusIssue(d);
+	    }).on('mouseover', function (d3_event, d) {
+	      utilHighlightEntities(d.entityIds, true, context);
+	    }).on('mouseout', function (d3_event, d) {
+	      utilHighlightEntities(d.entityIds, false, context);
+	    });
+	    var labelsEnter = itemsEnter.append('div').attr('class', 'issue-label');
+	    var textEnter = labelsEnter.append('span').attr('class', 'issue-text');
+	    textEnter.append('span').attr('class', 'issue-icon').each(function (d) {
+	      var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
+	      select(this).call(svgIcon(iconName));
+	    });
+	    textEnter.append('span').attr('class', 'issue-message');
+	    /*
+	    labelsEnter
+	        .append('span')
+	        .attr('class', 'issue-autofix')
+	        .each(function(d) {
+	            if (!d.autoFix) return;
+	             d3_select(this)
+	                .append('button')
+	                .attr('title', t('issues.fix_one.title'))
+	                .datum(d.autoFix)  // set button datum to the autofix
+	                .attr('class', 'autofix action')
+	                .on('click', function(d3_event, d) {
+	                    d3_event.preventDefault();
+	                    d3_event.stopPropagation();
+	                     var issuesEntityIDs = d.issue.entityIds;
+	                    utilHighlightEntities(issuesEntityIDs.concat(d.entityIds), false, context);
+	                     context.perform.apply(context, d.autoArgs);
+	                    context.validator().validate();
+	                })
+	                .call(svgIcon('#iD-icon-wrench'));
+	        });
+	    */
+	    // Update
 
-	        var panelsListEnter = selection.selectAll('.md-extras-list')
-	            .data([0])
-	            .enter()
-	            .append('ul')
-	            .attr('class', 'layer-list md-extras-list');
-
-	        var historyPanelLabelEnter = panelsListEnter
-	            .append('li')
-	            .attr('class', 'history-panel-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('map_data.history_panel.tooltip'))
-	                .keys([uiCmd('⌘⇧' + _t('info_panels.history.key'))])
-	                .placement('top')
-	            );
-
-	        historyPanelLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                context.ui().info.toggle('history');
+	    items = items.merge(itemsEnter).order();
+	    items.selectAll('.issue-message').html(function (d) {
+	      return d.message(context);
+	    });
+	    /*
+	    // autofix
+	    var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
+	     var autoFixAll = selection.selectAll('.autofix-all')
+	        .data(canAutoFix.length ? [0] : []);
+	     // exit
+	    autoFixAll.exit()
+	        .remove();
+	     // enter
+	    var autoFixAllEnter = autoFixAll.enter()
+	        .insert('div', '.issues-list')
+	        .attr('class', 'autofix-all');
+	     var linkEnter = autoFixAllEnter
+	        .append('a')
+	        .attr('class', 'autofix-all-link')
+	        .attr('href', '#');
+	     linkEnter
+	        .append('span')
+	        .attr('class', 'autofix-all-link-text')
+	        .html(t.html('issues.fix_all.title'));
+	     linkEnter
+	        .append('span')
+	        .attr('class', 'autofix-all-link-icon')
+	        .call(svgIcon('#iD-icon-wrench'));
+	     if (severity === 'warning') {
+	        renderIgnoredIssuesReset(selection);
+	    }
+	     // update
+	    autoFixAll = autoFixAll
+	        .merge(autoFixAllEnter);
+	     autoFixAll.selectAll('.autofix-all-link')
+	        .on('click', function() {
+	            context.pauseChangeDispatch();
+	            context.perform(actionNoop());
+	            canAutoFix.forEach(function(issue) {
+	                var args = issue.autoFix.autoArgs.slice();  // copy
+	                if (typeof args[args.length - 1] !== 'function') {
+	                    args.pop();
+	                }
+	                args.push(t('issues.fix_all.annotation'));
+	                context.replace.apply(context, args);
 	            });
+	            context.resumeChangeDispatch();
+	            context.validator().validate();
+	        });
+	    */
+	  }
 
-	        historyPanelLabelEnter
-	            .append('span')
-	            .text(_t('map_data.history_panel.title'));
-
-	        var measurementPanelLabelEnter = panelsListEnter
-	            .append('li')
-	            .attr('class', 'measurement-panel-toggle-item')
-	            .append('label')
-	            .call(uiTooltip()
-	                .title(_t('map_data.measurement_panel.tooltip'))
-	                .keys([uiCmd('⌘⇧' + _t('info_panels.measurement.key'))])
-	                .placement('top')
-	            );
-
-	        measurementPanelLabelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function() {
-	                event.preventDefault();
-	                context.ui().info.toggle('measurement');
-	            });
+	  context.validator().on('validated.uiSectionValidationIssues' + id, function () {
+	    window.requestIdleCallback(function () {
+	      reloadIssues();
+	      section.reRender();
+	    });
+	  });
+	  context.map().on('move.uiSectionValidationIssues' + id, debounce(function () {
+	    window.requestIdleCallback(function () {
+	      if (getOptions().where === 'visible') {
+	        // must refetch issues if they are viewport-dependent
+	        reloadIssues();
+	      } // always reload list to re-sort-by-distance
 
-	        measurementPanelLabelEnter
-	            .append('span')
-	            .text(_t('map_data.measurement_panel.title'));
-	    }
 
-	    context.layers().on('change.uiSectionDataLayers', section.reRender);
+	      section.reRender();
+	    });
+	  }, 1000));
+	  return section;
+	}
 
-	    context.map()
-	        .on('move.uiSectionDataLayers',
-	            debounce(function() {
-	                // Detroit layers may have moved in or out of view
-	                window.requestIdleCallback(section.reRender);
-	            }, 1000)
-	        );
+	function uiSectionValidationOptions(context) {
+	  var section = uiSection('issues-options', context).content(renderContent);
+
+	  function renderContent(selection) {
+	    var container = selection.selectAll('.issues-options-container').data([0]);
+	    container = container.enter().append('div').attr('class', 'issues-options-container').merge(container);
+	    var data = [{
+	      key: 'what',
+	      values: ['edited', 'all']
+	    }, {
+	      key: 'where',
+	      values: ['visible', 'all']
+	    }];
+	    var options = container.selectAll('.issues-option').data(data, function (d) {
+	      return d.key;
+	    });
+	    var optionsEnter = options.enter().append('div').attr('class', function (d) {
+	      return 'issues-option issues-option-' + d.key;
+	    });
+	    optionsEnter.append('div').attr('class', 'issues-option-title').html(function (d) {
+	      return _t.html('issues.options.' + d.key + '.title');
+	    });
+	    var valuesEnter = optionsEnter.selectAll('label').data(function (d) {
+	      return d.values.map(function (val) {
+	        return {
+	          value: val,
+	          key: d.key
+	        };
+	      });
+	    }).enter().append('label');
+	    valuesEnter.append('input').attr('type', 'radio').attr('name', function (d) {
+	      return 'issues-option-' + d.key;
+	    }).attr('value', function (d) {
+	      return d.value;
+	    }).property('checked', function (d) {
+	      return getOptions()[d.key] === d.value;
+	    }).on('change', function (d3_event, d) {
+	      updateOptionValue(d3_event, d.key, d.value);
+	    });
+	    valuesEnter.append('span').html(function (d) {
+	      return _t.html('issues.options.' + d.key + '.' + d.value);
+	    });
+	  }
 
-	    return section;
-	}
+	  function getOptions() {
+	    return {
+	      what: corePreferences('validate-what') || 'edited',
+	      // 'all', 'edited'
+	      where: corePreferences('validate-where') || 'all' // 'all', 'visible'
 
-	function uiSectionMapFeatures(context) {
+	    };
+	  }
 
-	    var _features = context.features().keys();
+	  function updateOptionValue(d3_event, d, val) {
+	    if (!val && d3_event && d3_event.target) {
+	      val = d3_event.target.value;
+	    }
 
-	    var section = uiSection('map-features', context)
-	        .title(_t('map_data.map_features'))
-	        .disclosureContent(renderDisclosureContent)
-	        .expandedByDefault(false);
+	    corePreferences('validate-' + d, val);
+	    context.validator().validate();
+	  }
 
-	    function renderDisclosureContent(selection) {
+	  return section;
+	}
 
-	        var container = selection.selectAll('.layer-feature-list-container')
-	            .data([0]);
+	function uiSectionValidationRules(context) {
+	  var MINSQUARE = 0;
+	  var MAXSQUARE = 20;
+	  var DEFAULTSQUARE = 5; // see also unsquare_way.js
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'layer-feature-list-container');
+	  var section = uiSection('issues-rules', context).disclosureContent(renderDisclosureContent).label(_t.html('issues.rules.title'));
 
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'layer-list layer-feature-list');
+	  var _ruleKeys = context.validator().getRuleKeys().filter(function (key) {
+	    return key !== 'maprules';
+	  }).sort(function (key1, key2) {
+	    // alphabetize by localized title
+	    return _t('issues.' + key1 + '.title') < _t('issues.' + key2 + '.title') ? -1 : 1;
+	  });
 
-	        var footer = containerEnter
-	            .append('div')
-	            .attr('class', 'feature-list-links section-footer');
-
-	        footer
-	            .append('a')
-	            .attr('class', 'feature-list-link')
-	            .attr('href', '#')
-	            .text(_t('issues.enable_all'))
-	            .on('click', function() {
-	                context.features().enableAll();
-	            });
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.issues-rulelist-container').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'issues-rulelist-container');
+	    containerEnter.append('ul').attr('class', 'layer-list issue-rules-list');
+	    var ruleLinks = containerEnter.append('div').attr('class', 'issue-rules-links section-footer');
+	    ruleLinks.append('a').attr('class', 'issue-rules-link').attr('href', '#').html(_t.html('issues.disable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.validator().disableRules(_ruleKeys);
+	    });
+	    ruleLinks.append('a').attr('class', 'issue-rules-link').attr('href', '#').html(_t.html('issues.enable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.validator().disableRules([]);
+	    }); // Update
 
-	        footer
-	            .append('a')
-	            .attr('class', 'feature-list-link')
-	            .attr('href', '#')
-	            .text(_t('issues.disable_all'))
-	            .on('click', function() {
-	                context.features().disableAll();
-	            });
+	    container = container.merge(containerEnter);
+	    container.selectAll('.issue-rules-list').call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
+	  }
 
-	        // Update
-	        container = container
-	            .merge(containerEnter);
+	  function drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
 
-	        container.selectAll('.layer-feature-list')
-	            .call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
-	    }
+	    items.exit().remove(); // Enter
 
-	    function drawListItems(selection, data, type, name, change, active) {
-	        var items = selection.selectAll('li')
-	            .data(data);
+	    var enter = items.enter().append('li');
 
-	        // Exit
-	        items.exit()
-	            .remove();
+	    if (name === 'rule') {
+	      enter.call(uiTooltip().title(function (d) {
+	        return _t.html('issues.' + d + '.tip');
+	      }).placement('top'));
+	    }
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .call(uiTooltip()
-	                .title(function(d) {
-	                    var tip = _t(name + '.' + d + '.tooltip');
-	                    if (autoHiddenFeature(d)) {
-	                        var msg = showsLayer('osm') ? _t('map_data.autohidden') : _t('map_data.osmhidden');
-	                        tip += '<div>' + msg + '</div>';
-	                    }
-	                    return tip;
-	                })
-	                .placement('top')
-	            );
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', name).on('change', change);
+	    label.append('span').html(function (d) {
+	      var params = {};
 
-	        var label = enter
-	            .append('label');
+	      if (d === 'unsquare_way') {
+	        params.val = '<span class="square-degrees"></span>';
+	      }
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', name)
-	            .on('change', change);
+	      return _t.html('issues.' + d + '.title', params);
+	    }); // Update
 
-	        label
-	            .append('span')
-	            .text(function(d) { return _t(name + '.' + d + '.description'); });
+	    items = items.merge(enter);
+	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false); // user-configurable square threshold
 
-	        // Update
-	        items = items
-	            .merge(enter);
+	    var degStr = corePreferences('validate-square-degrees');
 
-	        items
-	            .classed('active', active)
-	            .selectAll('input')
-	            .property('checked', active)
-	            .property('indeterminate', autoHiddenFeature);
+	    if (degStr === null) {
+	      degStr = DEFAULTSQUARE.toString();
 	    }
 
-	    function autoHiddenFeature(d) {
-	        return context.features().autoHidden(d);
-	    }
+	    var span = items.selectAll('.square-degrees');
+	    var input = span.selectAll('.square-degrees-input').data([0]); // enter / update
 
-	    function showsFeature(d) {
-	        return context.features().enabled(d);
-	    }
+	    input.enter().append('input').attr('type', 'number').attr('min', MINSQUARE.toString()).attr('max', MAXSQUARE.toString()).attr('step', '0.5').attr('class', 'square-degrees-input').call(utilNoAuto).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      this.select();
+	    }).on('keyup', function (d3_event) {
+	      if (d3_event.keyCode === 13) {
+	        // ↩ Return
+	        this.blur();
+	        this.select();
+	      }
+	    }).on('blur', changeSquare).merge(input).property('value', degStr);
+	  }
 
-	    function clickFeature(d) {
-	        context.features().toggle(d);
-	    }
+	  function changeSquare() {
+	    var input = select(this);
+	    var degStr = utilGetSetValue(input).trim();
+	    var degNum = parseFloat(degStr, 10);
 
-	    function showsLayer(id) {
-	        var layer = context.layers().layer(id);
-	        return layer && layer.enabled();
+	    if (!isFinite(degNum)) {
+	      degNum = DEFAULTSQUARE;
+	    } else if (degNum > MAXSQUARE) {
+	      degNum = MAXSQUARE;
+	    } else if (degNum < MINSQUARE) {
+	      degNum = MINSQUARE;
 	    }
 
-	    // add listeners
-	    context.features()
-	        .on('change.map_features', section.reRender);
+	    degNum = Math.round(degNum * 10) / 10; // round to 1 decimal
 
-	    return section;
+	    degStr = degNum.toString();
+	    input.property('value', degStr);
+	    corePreferences('validate-square-degrees', degStr);
+	    context.validator().reloadUnsquareIssues();
+	  }
+
+	  function isRuleEnabled(d) {
+	    return context.validator().isRuleEnabled(d);
+	  }
+
+	  function toggleRule(d3_event, d) {
+	    context.validator().toggleRule(d);
+	  }
+
+	  context.validator().on('validated.uiSectionValidationRules', function () {
+	    window.requestIdleCallback(section.reRender);
+	  });
+	  return section;
 	}
 
-	function uiSectionMapStyleOptions(context) {
+	function uiSectionValidationStatus(context) {
+	  var section = uiSection('issues-status', context).content(renderContent).shouldDisplay(function () {
+	    var issues = context.validator().getIssues(getOptions());
+	    return issues.length === 0;
+	  });
 
-	    var section = uiSection('fill-area', context)
-	        .title(_t('map_data.style_options'))
-	        .disclosureContent(renderDisclosureContent)
-	        .expandedByDefault(false);
-
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.layer-fill-list')
-	            .data([0]);
-
-	        container.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-fill-list')
-	            .merge(container)
-	            .call(drawListItems, context.map().areaFillOptions, 'radio', 'area_fill', setFill, isActiveFill);
-
-	        var container2 = selection.selectAll('.layer-visual-diff-list')
-	            .data([0]);
-
-	        container2.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-visual-diff-list')
-	            .merge(container2)
-	            .call(drawListItems, ['highlight_edits'], 'checkbox', 'visual_diff', toggleHighlightEdited, function() {
-	                return context.surface().classed('highlight-edited');
-	            });
-	    }
+	  function getOptions() {
+	    return {
+	      what: corePreferences('validate-what') || 'edited',
+	      where: corePreferences('validate-where') || 'all'
+	    };
+	  }
 
-	    function drawListItems(selection, data, type, name, change, active) {
-	        var items = selection.selectAll('li')
-	            .data(data);
+	  function renderContent(selection) {
+	    var box = selection.selectAll('.box').data([0]);
+	    var boxEnter = box.enter().append('div').attr('class', 'box');
+	    boxEnter.append('div').call(svgIcon('#iD-icon-apply', 'pre-text'));
+	    var noIssuesMessage = boxEnter.append('span');
+	    noIssuesMessage.append('strong').attr('class', 'message');
+	    noIssuesMessage.append('br');
+	    noIssuesMessage.append('span').attr('class', 'details');
+	    renderIgnoredIssuesReset(selection);
+	    setNoIssuesText(selection);
+	  }
 
-	        // Exit
-	        items.exit()
-	            .remove();
+	  function renderIgnoredIssuesReset(selection) {
+	    var ignoredIssues = context.validator().getIssues({
+	      what: 'all',
+	      where: 'all',
+	      includeDisabledRules: true,
+	      includeIgnored: 'only'
+	    });
+	    var resetIgnored = selection.selectAll('.reset-ignored').data(ignoredIssues.length ? [0] : []); // exit
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .call(uiTooltip()
-	                .title(function(d) {
-	                    return _t(name + '.' + d + '.tooltip');
-	                })
-	                .keys(function(d) {
-	                    var key = (d === 'wireframe' ? _t('area_fill.wireframe.key') : null);
-	                    if (d === 'highlight_edits') { key = _t('map_data.highlight_edits.key'); }
-	                    return key ? [key] : null;
-	                })
-	                .placement('top')
-	            );
+	    resetIgnored.exit().remove(); // enter
 
-	        var label = enter
-	            .append('label');
+	    var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
+	    resetIgnoredEnter.append('a').attr('href', '#'); // update
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', name)
-	            .on('change', change);
+	    resetIgnored = resetIgnored.merge(resetIgnoredEnter);
+	    resetIgnored.select('a').html(_t('inspector.title_count', {
+	      title: _t.html('issues.reset_ignored'),
+	      count: ignoredIssues.length
+	    }));
+	    resetIgnored.on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.validator().resetIgnoredIssues();
+	    });
+	  }
 
-	        label
-	            .append('span')
-	            .text(function(d) { return _t(name + '.' + d + '.description'); });
+	  function setNoIssuesText(selection) {
+	    var opts = getOptions();
 
-	        // Update
-	        items = items
-	            .merge(enter);
+	    function checkForHiddenIssues(cases) {
+	      for (var type in cases) {
+	        var hiddenOpts = cases[type];
+	        var hiddenIssues = context.validator().getIssues(hiddenOpts);
 
-	        items
-	            .classed('active', active)
-	            .selectAll('input')
-	            .property('checked', active)
-	            .property('indeterminate', false);
-	    }
+	        if (hiddenIssues.length) {
+	          selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.' + type, {
+	            count: hiddenIssues.length.toString()
+	          }));
+	          return;
+	        }
+	      }
 
-	    function isActiveFill(d) {
-	        return context.map().activeAreaFill() === d;
+	      selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.none'));
 	    }
 
-	    function toggleHighlightEdited() {
-	        event.preventDefault();
-	        context.map().toggleHighlightEdited();
+	    var messageType;
+
+	    if (opts.what === 'edited' && opts.where === 'visible') {
+	      messageType = 'edits_in_view';
+	      checkForHiddenIssues({
+	        elsewhere: {
+	          what: 'edited',
+	          where: 'all'
+	        },
+	        everything_else: {
+	          what: 'all',
+	          where: 'visible'
+	        },
+	        disabled_rules: {
+	          what: 'edited',
+	          where: 'visible',
+	          includeDisabledRules: 'only'
+	        },
+	        everything_else_elsewhere: {
+	          what: 'all',
+	          where: 'all'
+	        },
+	        disabled_rules_elsewhere: {
+	          what: 'edited',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'edited',
+	          where: 'visible',
+	          includeIgnored: 'only'
+	        },
+	        ignored_issues_elsewhere: {
+	          what: 'edited',
+	          where: 'all',
+	          includeIgnored: 'only'
+	        }
+	      });
+	    } else if (opts.what === 'edited' && opts.where === 'all') {
+	      messageType = 'edits';
+	      checkForHiddenIssues({
+	        everything_else: {
+	          what: 'all',
+	          where: 'all'
+	        },
+	        disabled_rules: {
+	          what: 'edited',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'edited',
+	          where: 'all',
+	          includeIgnored: 'only'
+	        }
+	      });
+	    } else if (opts.what === 'all' && opts.where === 'visible') {
+	      messageType = 'everything_in_view';
+	      checkForHiddenIssues({
+	        elsewhere: {
+	          what: 'all',
+	          where: 'all'
+	        },
+	        disabled_rules: {
+	          what: 'all',
+	          where: 'visible',
+	          includeDisabledRules: 'only'
+	        },
+	        disabled_rules_elsewhere: {
+	          what: 'all',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'all',
+	          where: 'visible',
+	          includeIgnored: 'only'
+	        },
+	        ignored_issues_elsewhere: {
+	          what: 'all',
+	          where: 'all',
+	          includeIgnored: 'only'
+	        }
+	      });
+	    } else if (opts.what === 'all' && opts.where === 'all') {
+	      messageType = 'everything';
+	      checkForHiddenIssues({
+	        disabled_rules: {
+	          what: 'all',
+	          where: 'all',
+	          includeDisabledRules: 'only'
+	        },
+	        ignored_issues: {
+	          what: 'all',
+	          where: 'all',
+	          includeIgnored: 'only'
+	        }
+	      });
 	    }
 
-	    function setFill(d) {
-	        context.map().activeAreaFill(d);
+	    if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
+	      messageType = 'no_edits';
 	    }
 
-	    context.map()
-	        .on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
+	    selection.select('.box .message').html(_t.html('issues.no_issues.message.' + messageType));
+	  }
 
-	    return section;
+	  context.validator().on('validated.uiSectionValidationStatus', function () {
+	    window.requestIdleCallback(section.reRender);
+	  });
+	  context.map().on('move.uiSectionValidationStatus', debounce(function () {
+	    window.requestIdleCallback(section.reRender);
+	  }, 1000));
+	  return section;
 	}
 
-	function uiSectionPhotoOverlays(context) {
-
-	    var layers = context.layers();
-
-	    var section = uiSection('photo-overlays', context)
-	        .title(_t('photo_overlays.title'))
-	        .disclosureContent(renderDisclosureContent)
-	        .expandedByDefault(false);
+	function uiPaneIssues(context) {
+	  var issuesPane = uiPane('issues', context).key(_t('issues.key')).label(_t.html('issues.title')).description(_t.html('issues.title')).iconName('iD-icon-alert').sections([uiSectionValidationOptions(context), uiSectionValidationStatus(context), uiSectionValidationIssues('issues-errors', 'error', context), uiSectionValidationIssues('issues-warnings', 'warning', context), uiSectionValidationRules(context)]);
+	  return issuesPane;
+	}
 
-	    function renderDisclosureContent(selection) {
-	        var container = selection.selectAll('.photo-overlay-container')
-	            .data([0]);
+	function uiSettingsCustomData(context) {
+	  var dispatch$1 = dispatch('change');
 
-	        container.enter()
-	            .append('div')
-	            .attr('class', 'photo-overlay-container')
-	            .merge(container)
-	            .call(drawPhotoItems)
-	            .call(drawPhotoTypeItems);
-	    }
+	  function render(selection) {
+	    var dataLayer = context.layers().layer('data'); // keep separate copies of original and current settings
+
+	    var _origSettings = {
+	      fileList: dataLayer && dataLayer.fileList() || null,
+	      url: corePreferences('settings-custom-data-url')
+	    };
+	    var _currSettings = {
+	      fileList: dataLayer && dataLayer.fileList() || null,
+	      url: corePreferences('settings-custom-data-url')
+	    }; // var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
+
+	    var modal = uiConfirm(selection).okButton();
+	    modal.classed('settings-modal settings-custom-data', true);
+	    modal.select('.modal-section.header').append('h3').html(_t.html('settings.custom_data.header'));
+	    var textSection = modal.select('.modal-section.message-text');
+	    textSection.append('pre').attr('class', 'instructions-file').html(_t.html('settings.custom_data.file.instructions'));
+	    textSection.append('input').attr('class', 'field-file').attr('type', 'file').property('files', _currSettings.fileList) // works for all except IE11
+	    .on('change', function (d3_event) {
+	      var files = d3_event.target.files;
+
+	      if (files && files.length) {
+	        _currSettings.url = '';
+	        textSection.select('.field-url').property('value', '');
+	        _currSettings.fileList = files;
+	      } else {
+	        _currSettings.fileList = null;
+	      }
+	    });
+	    textSection.append('h4').html(_t.html('settings.custom_data.or'));
+	    textSection.append('pre').attr('class', 'instructions-url').html(_t.html('settings.custom_data.url.instructions'));
+	    textSection.append('textarea').attr('class', 'field-url').attr('placeholder', _t('settings.custom_data.url.placeholder')).call(utilNoAuto).property('value', _currSettings.url); // insert a cancel button
 
-	    function drawPhotoItems(selection) {
-	        var photoKeys = context.photos().overlayLayerIDs();
-	        var photoLayers = layers.all().filter(function(obj) { return photoKeys.indexOf(obj.id) !== -1; });
-	        var data = photoLayers.filter(function(obj) { return obj.layer.supported(); });
+	    var buttonSection = modal.select('.modal-section.buttons');
+	    buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
+	    buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
+	    buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
 
-	        function layerSupported(d) {
-	            return d.layer && d.layer.supported();
-	        }
-	        function layerEnabled(d) {
-	            return layerSupported(d) && d.layer.enabled();
-	        }
+	    function isSaveDisabled() {
+	      return null;
+	    } // restore the original url
 
-	        var ul = selection
-	            .selectAll('.layer-list-photos')
-	            .data([0]);
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-photos')
-	            .merge(ul);
+	    function clickCancel() {
+	      textSection.select('.field-url').property('value', _origSettings.url);
+	      corePreferences('settings-custom-data-url', _origSettings.url);
+	      this.blur();
+	      modal.close();
+	    } // accept the current url
 
-	        var li = ul.selectAll('.list-item-photos')
-	            .data(data);
 
-	        li.exit()
-	            .remove();
+	    function clickSave() {
+	      _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) {
-	                var classes = 'list-item-photos list-item-' + d.id;
-	                if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
-	                    classes += ' indented';
-	                }
-	                return classes;
-	            });
+	      if (_currSettings.url) {
+	        _currSettings.fileList = null;
+	      }
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                var titleID;
-	                if (d.id === 'mapillary-signs') { titleID = 'mapillary.signs.tooltip'; }
-	                else if (d.id === 'mapillary') { titleID = 'mapillary_images.tooltip'; }
-	                else if (d.id === 'openstreetcam') { titleID = 'openstreetcam_images.tooltip'; }
-	                else { titleID = d.id.replace(/-/g, '_') + '.tooltip'; }
-	                select(this)
-	                    .call(uiTooltip()
-	                        .title(_t(titleID))
-	                        .placement('top')
-	                    );
-	            });
+	      if (_currSettings.fileList) {
+	        _currSettings.url = '';
+	      }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) { toggleLayer(d.id); });
-
-	        labelEnter
-	            .append('span')
-	            .text(function(d) {
-	                var id = d.id;
-	                if (id === 'mapillary-signs') { id = 'photo_overlays.traffic_signs'; }
-	                return _t(id.replace(/-/g, '_') + '.title');
-	            });
+	      corePreferences('settings-custom-data-url', _currSettings.url);
+	      this.blur();
+	      modal.close();
+	      dispatch$1.call('change', this, _currSettings);
+	    }
+	  }
 
+	  return utilRebind(render, dispatch$1, 'on');
+	}
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', layerEnabled)
-	            .selectAll('input')
-	            .property('checked', layerEnabled);
-	    }
+	function uiSectionDataLayers(context) {
+	  var settingsCustomData = uiSettingsCustomData(context).on('change', customChanged);
+	  var layers = context.layers();
+	  var section = uiSection('data-layers', context).label(_t.html('map_data.data_layers')).disclosureContent(renderDisclosureContent);
 
-	    function drawPhotoTypeItems(selection) {
-	        var data = context.photos().allPhotoTypes();
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.data-layer-container').data([0]);
+	    container.enter().append('div').attr('class', 'data-layer-container').merge(container).call(drawOsmItems).call(drawQAItems).call(drawCustomDataItems).call(drawVectorItems) // Beta - Detroit mapping challenge
+	    .call(drawPanelItems);
+	  }
 
-	        function typeEnabled(d) {
-	            return context.photos().showsPhotoType(d);
-	        }
+	  function showsLayer(which) {
+	    var layer = layers.layer(which);
 
-	        var ul = selection
-	            .selectAll('.layer-list-photo-types')
-	            .data(context.photos().shouldFilterByPhotoType() ? [0] : []);
+	    if (layer) {
+	      return layer.enabled();
+	    }
 
-	        ul.exit()
-	            .remove();
+	    return false;
+	  }
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-photo-types')
-	            .merge(ul);
+	  function setLayer(which, enabled) {
+	    // Don't allow layer changes while drawing - #6584
+	    var mode = context.mode();
+	    if (mode && /^draw/.test(mode.id)) return;
+	    var layer = layers.layer(which);
 
-	        var li = ul.selectAll('.list-item-photo-types')
-	            .data(data);
+	    if (layer) {
+	      layer.enabled(enabled);
 
-	        li.exit()
-	            .remove();
+	      if (!enabled && (which === 'osm' || which === 'notes')) {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
+	  }
 
-	        var liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) {
-	                return 'list-item-photo-types list-item-' + d;
-	            });
+	  function toggleLayer(which) {
+	    setLayer(which, !showsLayer(which));
+	  }
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiTooltip()
-	                        .title(_t('photo_overlays.photo_type.' + d + '.tooltip'))
-	                        .placement('top')
-	                    );
-	            });
+	  function drawOsmItems(selection) {
+	    var osmKeys = ['osm', 'notes'];
+	    var osmLayers = layers.all().filter(function (obj) {
+	      return osmKeys.indexOf(obj.id) !== -1;
+	    });
+	    var ul = selection.selectAll('.layer-list-osm').data([0]);
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-osm').merge(ul);
+	    var li = ul.selectAll('.list-item').data(osmLayers);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      return 'list-item list-item-' + d.id;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      if (d.id === 'osm') {
+	        select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).keys([uiCmd('⌥' + _t('area_fill.wireframe.key'))]).placement('bottom'));
+	      } else {
+	        select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
+	      }
+	    });
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      toggleLayer(d.id);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return _t.html('map_data.layers.' + d.id + '.title');
+	    }); // Update
+
+	    li.merge(liEnter).classed('active', function (d) {
+	      return d.layer.enabled();
+	    }).selectAll('input').property('checked', function (d) {
+	      return d.layer.enabled();
+	    });
+	  }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) {
-	                context.photos().togglePhotoType(d);
-	            });
+	  function drawQAItems(selection) {
+	    var qaKeys = ['keepRight', 'improveOSM', 'osmose'];
+	    var qaLayers = layers.all().filter(function (obj) {
+	      return qaKeys.indexOf(obj.id) !== -1;
+	    });
+	    var ul = selection.selectAll('.layer-list-qa').data([0]);
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-qa').merge(ul);
+	    var li = ul.selectAll('.list-item').data(qaLayers);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      return 'list-item list-item-' + d.id;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
+	    });
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      toggleLayer(d.id);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return _t.html('map_data.layers.' + d.id + '.title');
+	    }); // Update
+
+	    li.merge(liEnter).classed('active', function (d) {
+	      return d.layer.enabled();
+	    }).selectAll('input').property('checked', function (d) {
+	      return d.layer.enabled();
+	    });
+	  } // Beta feature - sample vector layers to support Detroit Mapping Challenge
+	  // https://github.com/osmus/detroit-mapping-challenge
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) {
-	                return _t('photo_overlays.photo_type.' + d + '.title');
-	            });
 
+	  function drawVectorItems(selection) {
+	    var dataLayer = layers.layer('data');
+	    var vtData = [{
+	      name: 'Detroit Neighborhoods/Parks',
+	      src: 'neighborhoods-parks',
+	      tooltip: 'Neighborhood boundaries and parks as compiled by City of Detroit in concert with community groups.',
+	      template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmur6x34562qp9iv1u3ksf-54hev,jonahadkins.cjksmqxdx33jj2wp90xd9x2md-4e5y2/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+	    }, {
+	      name: 'Detroit Composite POIs',
+	      src: 'composite-poi',
+	      tooltip: 'Fire Inspections, Business Licenses, and other public location data collated from the City of Detroit.',
+	      template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmm6a02sli31myxhsr7zf3-2sw8h/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+	    }, {
+	      name: 'Detroit All-The-Places POIs',
+	      src: 'alltheplaces-poi',
+	      tooltip: 'Public domain business location data created by web scrapers.',
+	      template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmswgk340g2vo06p1w9w0j-8fjjc/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+	    }]; // Only show this if the map is around Detroit..
+
+	    var detroit = geoExtent([-83.5, 42.1], [-82.8, 42.5]);
+	    var showVectorItems = context.map().zoom() > 9 && detroit.contains(context.map().center());
+	    var container = selection.selectAll('.vectortile-container').data(showVectorItems ? [0] : []);
+	    container.exit().remove();
+	    var containerEnter = container.enter().append('div').attr('class', 'vectortile-container');
+	    containerEnter.append('h4').attr('class', 'vectortile-header').html('Detroit Vector Tiles (Beta)');
+	    containerEnter.append('ul').attr('class', 'layer-list layer-list-vectortile');
+	    containerEnter.append('div').attr('class', 'vectortile-footer').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmus/detroit-mapping-challenge').append('span').html('About these layers');
+	    container = container.merge(containerEnter);
+	    var ul = container.selectAll('.layer-list-vectortile');
+	    var li = ul.selectAll('.list-item').data(vtData);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      return 'list-item list-item-' + d.src;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      select(this).call(uiTooltip().title(d.tooltip).placement('top'));
+	    });
+	    labelEnter.append('input').attr('type', 'radio').attr('name', 'vectortile').on('change', selectVTLayer);
+	    labelEnter.append('span').html(function (d) {
+	      return d.name;
+	    }); // Update
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', typeEnabled)
-	            .selectAll('input')
-	            .property('checked', typeEnabled);
-	    }
+	    li.merge(liEnter).classed('active', isVTLayerSelected).selectAll('input').property('checked', isVTLayerSelected);
 
-	    function toggleLayer(which) {
-	        setLayer(which, !showsLayer(which));
+	    function isVTLayerSelected(d) {
+	      return dataLayer && dataLayer.template() === d.template;
 	    }
 
-	    function showsLayer(which) {
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            return layer.enabled();
-	        }
-	        return false;
-	    }
+	    function selectVTLayer(d3_event, d) {
+	      corePreferences('settings-custom-data-url', d.template);
 
-	    function setLayer(which, enabled) {
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            layer.enabled(enabled);
-	        }
+	      if (dataLayer) {
+	        dataLayer.template(d.template, d.src);
+	        dataLayer.enabled(true);
+	      }
 	    }
+	  }
 
-	    context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
-	    context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
-
-	    return section;
-	}
+	  function drawCustomDataItems(selection) {
+	    var dataLayer = layers.layer('data');
+	    var hasData = dataLayer && dataLayer.hasData();
+	    var showsData = hasData && dataLayer.enabled();
+	    var ul = selection.selectAll('.layer-list-data').data(dataLayer ? [0] : []); // Exit
 
-	function uiPaneMapData(context) {
+	    ul.exit().remove(); // Enter
 
-	    var mapDataPane = uiPane('map-data', context)
-	        .key(_t('map_data.key'))
-	        .title(_t('map_data.title'))
-	        .description(_t('map_data.description'))
-	        .iconName('iD-icon-data')
-	        .sections([
-	            uiSectionDataLayers(context),
-	            uiSectionPhotoOverlays(context),
-	            uiSectionMapStyleOptions(context),
-	            uiSectionMapFeatures(context)
-	        ]);
+	    var ulEnter = ul.enter().append('ul').attr('class', 'layer-list layer-list-data');
+	    var liEnter = ulEnter.append('li').attr('class', 'list-item-data');
+	    var labelEnter = liEnter.append('label').call(uiTooltip().title(_t.html('map_data.layers.custom.tooltip')).placement('top'));
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function () {
+	      toggleLayer('data');
+	    });
+	    labelEnter.append('span').html(_t.html('map_data.layers.custom.title'));
+	    liEnter.append('button').attr('class', 'open-data-options').call(uiTooltip().title(_t.html('settings.custom_data.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', editCustom).call(svgIcon('#iD-icon-more'));
+	    liEnter.append('button').attr('class', 'zoom-to-data').call(uiTooltip().title(_t.html('map_data.layers.custom.zoom')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+	      if (select(this).classed('disabled')) return;
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      dataLayer.fitZoom();
+	    }).call(svgIcon('#iD-icon-framed-dot', 'monochrome')); // Update
 
-	    return mapDataPane;
-	}
+	    ul = ul.merge(ulEnter);
+	    ul.selectAll('.list-item-data').classed('active', showsData).selectAll('label').classed('deemphasize', !hasData).selectAll('input').property('disabled', !hasData).property('checked', showsData);
+	    ul.selectAll('button.zoom-to-data').classed('disabled', !hasData);
+	  }
 
-	function uiSectionPrivacy(context) {
+	  function editCustom(d3_event) {
+	    d3_event.preventDefault();
+	    context.container().call(settingsCustomData);
+	  }
 
-	    var section = uiSection('preferences-third-party', context)
-	      .title(_t('preferences.privacy.title'))
-	      .disclosureContent(renderDisclosureContent);
+	  function customChanged(d) {
+	    var dataLayer = layers.layer('data');
 
-	    var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+	    if (d && d.url) {
+	      dataLayer.url(d.url);
+	    } else if (d && d.fileList) {
+	      dataLayer.fileList(d.fileList);
+	    }
+	  }
 
-	    function renderDisclosureContent(selection) {
-	      // enter
-	      var privacyOptionsListEnter = selection.selectAll('.privacy-options-list')
-	        .data([0])
-	        .enter()
-	        .append('ul')
-	        .attr('class', 'layer-list privacy-options-list');
-
-	      var thirdPartyIconsEnter = privacyOptionsListEnter
-	        .append('li')
-	        .attr('class', 'privacy-third-party-icons-item')
-	        .append('label')
-	        .call(uiTooltip()
-	          .title(_t('preferences.privacy.third_party_icons.tooltip'))
-	          .placement('bottom')
-	        );
+	  function drawPanelItems(selection) {
+	    var panelsListEnter = selection.selectAll('.md-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list md-extras-list');
+	    var historyPanelLabelEnter = panelsListEnter.append('li').attr('class', 'history-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.history_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.history.key'))]).placement('top'));
+	    historyPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.ui().info.toggle('history');
+	    });
+	    historyPanelLabelEnter.append('span').html(_t.html('map_data.history_panel.title'));
+	    var measurementPanelLabelEnter = panelsListEnter.append('li').attr('class', 'measurement-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.measurement_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.measurement.key'))]).placement('top'));
+	    measurementPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.ui().info.toggle('measurement');
+	    });
+	    measurementPanelLabelEnter.append('span').html(_t.html('map_data.measurement_panel.title'));
+	  }
 
-	      thirdPartyIconsEnter
-	        .append('input')
-	        .attr('type', 'checkbox')
-	        .on('change', function () {
-	          event.preventDefault();
-	          _showThirdPartyIcons = (_showThirdPartyIcons === 'true') ? 'false' : 'true';
-	          corePreferences('preferences.privacy.thirdpartyicons', _showThirdPartyIcons);
-	          update();
-	        });
+	  context.layers().on('change.uiSectionDataLayers', section.reRender);
+	  context.map().on('move.uiSectionDataLayers', debounce(function () {
+	    // Detroit layers may have moved in or out of view
+	    window.requestIdleCallback(section.reRender);
+	  }, 1000));
+	  return section;
+	}
 
-	      thirdPartyIconsEnter
-	        .append('span')
-	        .text(_t('preferences.privacy.third_party_icons.description'));
+	function uiSectionMapFeatures(context) {
+	  var _features = context.features().keys();
+
+	  var section = uiSection('map-features', context).label(_t.html('map_data.map_features')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.layer-feature-list-container').data([0]);
+	    var containerEnter = container.enter().append('div').attr('class', 'layer-feature-list-container');
+	    containerEnter.append('ul').attr('class', 'layer-list layer-feature-list');
+	    var footer = containerEnter.append('div').attr('class', 'feature-list-links section-footer');
+	    footer.append('a').attr('class', 'feature-list-link').attr('href', '#').html(_t.html('issues.disable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.features().disableAll();
+	    });
+	    footer.append('a').attr('class', 'feature-list-link').attr('href', '#').html(_t.html('issues.enable_all')).on('click', function (d3_event) {
+	      d3_event.preventDefault();
+	      context.features().enableAll();
+	    }); // Update
 
+	    container = container.merge(containerEnter);
+	    container.selectAll('.layer-feature-list').call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
+	  }
 
-	      // Privacy Policy link
-	      selection.selectAll('.privacy-link')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'privacy-link')
-	        .append('a')
-	        .attr('target', '_blank')
-	        .call(svgIcon('#iD-icon-out-link', 'inline'))
-	        .attr('href', 'https://github.com/openstreetmap/iD/blob/release/PRIVACY.md')
-	        .append('span')
-	        .text(_t('preferences.privacy.privacy_link'));
+	  function drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
 
-	      update();
+	    items.exit().remove(); // Enter
 
+	    var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
+	      var tip = _t.html(name + '.' + d + '.tooltip');
 
-	      function update() {
-	        selection.selectAll('.privacy-third-party-icons-item')
-	          .classed('active', (_showThirdPartyIcons === 'true'))
-	          .select('input')
-	          .property('checked', (_showThirdPartyIcons === 'true'));
+	      if (autoHiddenFeature(d)) {
+	        var msg = showsLayer('osm') ? _t.html('map_data.autohidden') : _t.html('map_data.osmhidden');
+	        tip += '<div>' + msg + '</div>';
 	      }
-	    }
 
-	    return section;
-	}
+	      return tip;
+	    }).placement('top'));
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', name).on('change', change);
+	    label.append('span').html(function (d) {
+	      return _t.html(name + '.' + d + '.description');
+	    }); // Update
 
-	function uiPanePreferences(context) {
+	    items = items.merge(enter);
+	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', autoHiddenFeature);
+	  }
 
-	  var preferencesPane = uiPane('preferences', context)
-	    .key(_t('preferences.key'))
-	    .title(_t('preferences.title'))
-	    .description(_t('preferences.description'))
-	    .iconName('fas-user-cog')
-	    .sections([
-	        uiSectionPrivacy(context)
-	    ]);
+	  function autoHiddenFeature(d) {
+	    return context.features().autoHidden(d);
+	  }
 
-	  return preferencesPane;
-	}
+	  function showsFeature(d) {
+	    return context.features().enabled(d);
+	  }
 
-	function uiInit(context) {
-	    var _initCounter = 0;
-	    var _needWidth = {};
+	  function clickFeature(d3_event, d) {
+	    context.features().toggle(d);
+	  }
 
-	    var _lastPointerType;
+	  function showsLayer(id) {
+	    var layer = context.layers().layer(id);
+	    return layer && layer.enabled();
+	  } // add listeners
 
 
-	    function render(container) {
+	  context.features().on('change.map_features', section.reRender);
+	  return section;
+	}
 
-	        container
-	            .on('click.ui', function() {
-	                // we're only concerned with the primary mouse button
-	                if (event.button !== 0) { return; }
+	function uiSectionMapStyleOptions(context) {
+	  var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.layer-fill-list').data([0]);
+	    container.enter().append('ul').attr('class', 'layer-list layer-fill-list').merge(container).call(drawListItems, context.map().areaFillOptions, 'radio', 'area_fill', setFill, isActiveFill);
+	    var container2 = selection.selectAll('.layer-visual-diff-list').data([0]);
+	    container2.enter().append('ul').attr('class', 'layer-list layer-visual-diff-list').merge(container2).call(drawListItems, ['highlight_edits'], 'checkbox', 'visual_diff', toggleHighlightEdited, function () {
+	      return context.surface().classed('highlight-edited');
+	    });
+	  }
 
-	                if (!event.composedPath) { return; }
+	  function drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
 
-	                // some targets have default click events we don't want to override
-	                var isOkayTarget = event.composedPath().some(function(node) {
-	                    // clicking <label> affects its <input> by default
-	                    return node.nodeName === 'LABEL' ||
-	                        // clicking <a> opens a hyperlink by default
-	                        node.nodeName === 'A';
-	                });
-	                if (isOkayTarget) { return; }
+	    items.exit().remove(); // Enter
 
-	                // disable double-tap-to-zoom on touchscreens
-	                event.preventDefault();
-	            });
+	    var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
+	      return _t.html(name + '.' + d + '.tooltip');
+	    }).keys(function (d) {
+	      var key = d === 'wireframe' ? _t('area_fill.wireframe.key') : null;
+	      if (d === 'highlight_edits') key = _t('map_data.highlight_edits.key');
+	      return key ? [key] : null;
+	    }).placement('top'));
+	    var label = enter.append('label');
+	    label.append('input').attr('type', type).attr('name', name).on('change', change);
+	    label.append('span').html(function (d) {
+	      return _t.html(name + '.' + d + '.description');
+	    }); // Update
 
-	        var detected = utilDetect();
+	    items = items.merge(enter);
+	    items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);
+	  }
 
-	        // only WebKit supports gesture events
-	        if ('GestureEvent' in window &&
-	            // Listening for gesture events on iOS 13.4+ breaks double-tapping,
-	            // but we only need to do this on desktop Safari anyway. – #7694
-	            !detected.isMobileWebKit) {
+	  function isActiveFill(d) {
+	    return context.map().activeAreaFill() === d;
+	  }
 
-	            // On iOS we disable pinch-to-zoom of the UI via the `touch-action`
-	            // CSS property, but on desktop Safari we need to manually cancel the
-	            // default gesture events.
-	            container.on('gesturestart.ui gesturechange.ui gestureend.ui', function() {
-	                // disable pinch-to-zoom of the UI via multitouch trackpads on macOS Safari
-	                event.preventDefault();
-	            });
-	        }
+	  function toggleHighlightEdited(d3_event) {
+	    d3_event.preventDefault();
+	    context.map().toggleHighlightEdited();
+	  }
 
-	        if ('PointerEvent' in window) {
-	            select(window)
-	                .on('pointerdown.ui pointerup.ui', function() {
-	                    var pointerType = event.pointerType || 'mouse';
-	                    if (_lastPointerType !== pointerType) {
-	                        _lastPointerType = pointerType;
-	                        container
-	                            .attr('pointer', pointerType);
-	                    }
-	                }, true);
-	        } else {
-	            _lastPointerType = 'mouse';
-	            container
-	                .attr('pointer', 'mouse');
-	        }
+	  function setFill(d3_event, d) {
+	    context.map().activeAreaFill(d);
+	  }
 
-	        container
-	            .attr('dir', _mainLocalizer.textDirection());
+	  context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
+	  return section;
+	}
 
-	        // setup fullscreen keybindings (no button shown at this time)
-	        container
-	            .call(uiFullScreen(context));
+	function uiSectionPhotoOverlays(context) {
+	  var layers = context.layers();
+	  var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-	        var map = context.map();
-	        map.redrawEnable(false);  // don't draw until we've set zoom/lat/long
+	  function renderDisclosureContent(selection) {
+	    var container = selection.selectAll('.photo-overlay-container').data([0]);
+	    container.enter().append('div').attr('class', 'photo-overlay-container').merge(container).call(drawPhotoItems).call(drawPhotoTypeItems).call(drawDateFilter).call(drawUsernameFilter);
+	  }
 
-	        map
-	            .on('hitMinZoom.ui', function() {
-	                ui.flash.text(_t('cannot_zoom'))();
-	            });
+	  function drawPhotoItems(selection) {
+	    var photoKeys = context.photos().overlayLayerIDs();
+	    var photoLayers = layers.all().filter(function (obj) {
+	      return photoKeys.indexOf(obj.id) !== -1;
+	    });
+	    var data = photoLayers.filter(function (obj) {
+	      return obj.layer.supported();
+	    });
 
-	        container
-	            .append('svg')
-	            .attr('id', 'ideditor-defs')
-	            .call(svgDefs(context));
+	    function layerSupported(d) {
+	      return d.layer && d.layer.supported();
+	    }
 
-	        container
-	            .append('div')
-	            .attr('class', 'sidebar')
-	            .call(ui.sidebar);
+	    function layerEnabled(d) {
+	      return layerSupported(d) && d.layer.enabled();
+	    }
 
-	        var content = container
-	            .append('div')
-	            .attr('class', 'main-content active');
+	    var ul = selection.selectAll('.layer-list-photos').data([0]);
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photos').merge(ul);
+	    var li = ul.selectAll('.list-item-photos').data(data);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      var classes = 'list-item-photos list-item-' + d.id;
 
-	        // Top toolbar
-	        content
-	            .append('div')
-	            .attr('class', 'top-toolbar-wrap')
-	            .append('div')
-	            .attr('class', 'top-toolbar fillD')
-	            .call(uiTopToolbar(context));
+	      if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
+	        classes += ' indented';
+	      }
 
-	        content
-	            .append('div')
-	            .attr('class', 'main-map')
-	            .attr('dir', 'ltr')
-	            .call(map);
+	      return classes;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      var titleID;
+	      if (d.id === 'mapillary-signs') titleID = 'mapillary.signs.tooltip';else if (d.id === 'mapillary') titleID = 'mapillary_images.tooltip';else if (d.id === 'openstreetcam') titleID = 'openstreetcam_images.tooltip';else titleID = d.id.replace(/-/g, '_') + '.tooltip';
+	      select(this).call(uiTooltip().title(_t.html(titleID)).placement('top'));
+	    });
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      toggleLayer(d.id);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      var id = d.id;
+	      if (id === 'mapillary-signs') id = 'photo_overlays.traffic_signs';
+	      return _t.html(id.replace(/-/g, '_') + '.title');
+	    }); // Update
 
-	        content
-	            .append('div')
-	            .attr('class', 'spinner')
-	            .call(uiSpinner(context));
+	    li.merge(liEnter).classed('active', layerEnabled).selectAll('input').property('checked', layerEnabled);
+	  }
 
-	        // Add attribution and footer
-	        var about = content
-	            .append('div')
-	            .attr('class', 'map-footer');
+	  function drawPhotoTypeItems(selection) {
+	    var data = context.photos().allPhotoTypes();
 
-	        about
-	            .append('div')
-	            .attr('class', 'attribution-wrap')
-	            .attr('dir', 'ltr')
-	            .call(uiAttribution(context));
+	    function typeEnabled(d) {
+	      return context.photos().showsPhotoType(d);
+	    }
 
-	        about
-	            .append('div')
-	            .attr('class', 'api-status')
-	            .call(uiStatus(context));
+	    var ul = selection.selectAll('.layer-list-photo-types').data([0]);
+	    ul.exit().remove();
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photo-types').merge(ul);
+	    var li = ul.selectAll('.list-item-photo-types').data(context.photos().shouldFilterByPhotoType() ? data : []);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', function (d) {
+	      return 'list-item-photo-types list-item-' + d;
+	    });
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      select(this).call(uiTooltip().title(_t.html('photo_overlays.photo_type.' + d + '.tooltip')).placement('top'));
+	    });
+	    labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+	      context.photos().togglePhotoType(d);
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return _t.html('photo_overlays.photo_type.' + d + '.title');
+	    }); // Update
 
+	    li.merge(liEnter).classed('active', typeEnabled).selectAll('input').property('checked', typeEnabled);
+	  }
 
-	        var footer = about
-	            .append('div')
-	            .attr('class', 'map-footer-bar fillD');
+	  function drawDateFilter(selection) {
+	    var data = context.photos().dateFilters();
 
-	        footer
-	            .append('div')
-	            .attr('class', 'flash-wrap footer-hide');
+	    function filterEnabled(d) {
+	      return context.photos().dateFilterValue(d);
+	    }
 
-	        var footerWrap = footer
-	            .append('div')
-	            .attr('class', 'main-footer-wrap footer-show');
+	    var ul = selection.selectAll('.layer-list-date-filter').data([0]);
+	    ul.exit().remove();
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-date-filter').merge(ul);
+	    var li = ul.selectAll('.list-item-date-filter').data(context.photos().shouldFilterByDate() ? data : []);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', 'list-item-date-filter');
+	    var labelEnter = liEnter.append('label').each(function (d) {
+	      select(this).call(uiTooltip().title(_t.html('photo_overlays.date_filter.' + d + '.tooltip')).placement('top'));
+	    });
+	    labelEnter.append('span').html(function (d) {
+	      return _t.html('photo_overlays.date_filter.' + d + '.title');
+	    });
+	    labelEnter.append('input').attr('type', 'date').attr('class', 'list-item-input').attr('placeholder', _t('units.year_month_day')).call(utilNoAuto).each(function (d) {
+	      utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+	    }).on('change', function (d3_event, d) {
+	      var value = utilGetSetValue(select(this)).trim();
+	      context.photos().setDateFilter(d, value, true); // reload the displayed dates
+
+	      li.selectAll('input').each(function (d) {
+	        utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+	      });
+	    });
+	    li = li.merge(liEnter).classed('active', filterEnabled);
+	  }
 
-	        footerWrap
-	            .append('div')
-	            .attr('class', 'scale-block')
-	            .call(uiScale(context));
+	  function drawUsernameFilter(selection) {
+	    function filterEnabled() {
+	      return context.photos().usernames();
+	    }
 
-	        var aboutList = footerWrap
-	            .append('div')
-	            .attr('class', 'info-block')
-	            .append('ul')
-	            .attr('class', 'map-footer-list');
-
-	        if (!context.embed()) {
-	            aboutList
-	                .call(uiAccount(context));
-	        }
-
-	        aboutList
-	            .append('li')
-	            .attr('class', 'version')
-	            .call(uiVersion(context));
-
-	        var issueLinks = aboutList
-	            .append('li');
-
-	        issueLinks
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('href', 'https://github.com/openstreetmap/iD/issues')
-	            .call(svgIcon('#iD-icon-bug', 'light'))
-	            .call(uiTooltip().title(_t('report_a_bug')).placement('top'));
-
-	        issueLinks
-	            .append('a')
-	            .attr('target', '_blank')
-	            .attr('href', 'https://github.com/openstreetmap/iD/blob/develop/CONTRIBUTING.md#translating')
-	            .call(svgIcon('#iD-icon-translate', 'light'))
-	            .call(uiTooltip().title(_t('help_translate')).placement('top'));
-
-	        aboutList
-	            .append('li')
-	            .attr('class', 'feature-warning')
-	            .attr('tabindex', -1)
-	            .call(uiFeatureInfo(context));
-
-	        aboutList
-	            .append('li')
-	            .attr('class', 'issues-info')
-	            .attr('tabindex', -1)
-	            .call(uiIssuesInfo(context));
-
-	        var apiConnections = context.apiConnections();
-	        if (apiConnections && apiConnections.length > 1) {
-	            aboutList
-	                .append('li')
-	                .attr('class', 'source-switch')
-	                .attr('tabindex', -1)
-	                .call(uiSourceSwitch(context)
-	                    .keys(apiConnections)
-	                );
-	        }
+	    var ul = selection.selectAll('.layer-list-username-filter').data([0]);
+	    ul.exit().remove();
+	    ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-username-filter').merge(ul);
+	    var li = ul.selectAll('.list-item-username-filter').data(context.photos().shouldFilterByUsername() ? ['username-filter'] : []);
+	    li.exit().remove();
+	    var liEnter = li.enter().append('li').attr('class', 'list-item-username-filter');
+	    var labelEnter = liEnter.append('label').each(function () {
+	      select(this).call(uiTooltip().title(_t.html('photo_overlays.username_filter.tooltip')).placement('top'));
+	    });
+	    labelEnter.append('span').html(_t.html('photo_overlays.username_filter.title'));
+	    labelEnter.append('input').attr('type', 'text').attr('class', 'list-item-input').call(utilNoAuto).property('value', usernameValue).on('change', function () {
+	      var value = select(this).property('value');
+	      context.photos().setUsernameFilter(value, true);
+	      select(this).property('value', usernameValue);
+	    });
+	    li.merge(liEnter).classed('active', filterEnabled);
+
+	    function usernameValue() {
+	      var usernames = context.photos().usernames();
+	      if (usernames) return usernames.join('; ');
+	      return usernames;
+	    }
+	  }
 
-	        aboutList
-	            .append('li')
-	            .attr('class', 'user-list')
-	            .attr('tabindex', -1)
-	            .call(uiContributors(context));
+	  function toggleLayer(which) {
+	    setLayer(which, !showsLayer(which));
+	  }
 
+	  function showsLayer(which) {
+	    var layer = layers.layer(which);
 
-	        // Setup map dimensions and move map to initial center/zoom.
-	        // This should happen after .main-content and toolbars exist.
-	        ui.onResize();
-	        map.redrawEnable(true);
+	    if (layer) {
+	      return layer.enabled();
+	    }
 
-	        ui.hash = behaviorHash(context);
-	        ui.hash();
-	        if (!ui.hash.hadHash) {
-	            map.centerZoom([0, 0], 2);
-	        }
+	    return false;
+	  }
 
+	  function setLayer(which, enabled) {
+	    var layer = layers.layer(which);
 
-	        var overMap = content
-	            .append('div')
-	            .attr('class', 'over-map');
+	    if (layer) {
+	      layer.enabled(enabled);
+	    }
+	  }
 
-	        // Map controls
-	        var controls = overMap
-	            .append('div')
-	            .attr('class', 'map-controls');
+	  context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
+	  context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+	  return section;
+	}
 
-	        controls
-	            .append('div')
-	            .attr('class', 'map-control zoombuttons')
-	            .call(uiZoom(context));
+	function uiPaneMapData(context) {
+	  var mapDataPane = uiPane('map-data', context).key(_t('map_data.key')).label(_t.html('map_data.title')).description(_t.html('map_data.description')).iconName('iD-icon-data').sections([uiSectionDataLayers(context), uiSectionPhotoOverlays(context), uiSectionMapStyleOptions(context), uiSectionMapFeatures(context)]);
+	  return mapDataPane;
+	}
 
-	        controls
-	            .append('div')
-	            .attr('class', 'map-control zoom-to-selection-control')
-	            .call(uiZoomToSelection(context));
+	function uiSectionPrivacy(context) {
+	  var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);
 
-	        controls
-	            .append('div')
-	            .attr('class', 'map-control geolocate-control')
-	            .call(uiGeolocate(context));
+	  var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
 
-	        // Add panes
-	        // This should happen after map is initialized, as some require surface()
-	        var panes = overMap
-	            .append('div')
-	            .attr('class', 'map-panes');
-
-	        var uiPanes = [
-	            uiPaneBackground(context),
-	            uiPaneMapData(context),
-	            uiPaneIssues(context),
-	            uiPanePreferences(context),
-	            uiPaneHelp(context)
-	        ];
+	  function renderDisclosureContent(selection) {
+	    // enter
+	    var privacyOptionsListEnter = selection.selectAll('.privacy-options-list').data([0]).enter().append('ul').attr('class', 'layer-list privacy-options-list');
+	    var thirdPartyIconsEnter = privacyOptionsListEnter.append('li').attr('class', 'privacy-third-party-icons-item').append('label').call(uiTooltip().title(_t.html('preferences.privacy.third_party_icons.tooltip')).placement('bottom'));
+	    thirdPartyIconsEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+	      d3_event.preventDefault();
+	      _showThirdPartyIcons = _showThirdPartyIcons === 'true' ? 'false' : 'true';
+	      corePreferences('preferences.privacy.thirdpartyicons', _showThirdPartyIcons);
+	      update();
+	    });
+	    thirdPartyIconsEnter.append('span').html(_t.html('preferences.privacy.third_party_icons.description')); // Privacy Policy link
 
-	        uiPanes.forEach(function(pane) {
-	            controls
-	                .append('div')
-	                .attr('class', 'map-control map-pane-control ' + pane.id + '-control')
-	                .call(pane.renderToggleButton);
+	    selection.selectAll('.privacy-link').data([0]).enter().append('div').attr('class', 'privacy-link').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/release/PRIVACY.md').append('span').html(_t.html('preferences.privacy.privacy_link'));
+	    update();
 
-	            panes
-	                .call(pane.renderPane);
-	        });
+	    function update() {
+	      selection.selectAll('.privacy-third-party-icons-item').classed('active', _showThirdPartyIcons === 'true').select('input').property('checked', _showThirdPartyIcons === 'true');
+	    }
+	  }
 
-	        ui.info = uiInfo(context);
+	  return section;
+	}
 
-	        // Add absolutely-positioned elements that sit on top of the map
-	        // This should happen after the map is ready (center/zoom)
-	        overMap
-	            .call(uiMapInMap(context))
-	            .call(ui.info)
-	            .call(uiNotice(context));
+	function uiPanePreferences(context) {
+	  var preferencesPane = uiPane('preferences', context).key(_t('preferences.key')).label(_t.html('preferences.title')).description(_t.html('preferences.description')).iconName('fas-user-cog').sections([uiSectionPrivacy(context)]);
+	  return preferencesPane;
+	}
 
+	function uiInit(context) {
+	  var _initCounter = 0;
+	  var _needWidth = {};
+
+	  var _lastPointerType;
+
+	  function render(container) {
+	    container.on('click.ui', function (d3_event) {
+	      // we're only concerned with the primary mouse button
+	      if (d3_event.button !== 0) return;
+	      if (!d3_event.composedPath) return; // some targets have default click events we don't want to override
+
+	      var isOkayTarget = d3_event.composedPath().some(function (node) {
+	        // we only care about element nodes
+	        return node.nodeType === 1 && ( // clicking <input> focuses it and/or changes a value
+	        node.nodeName === 'INPUT' || // clicking <label> affects its <input> by default
+	        node.nodeName === 'LABEL' || // clicking <a> opens a hyperlink by default
+	        node.nodeName === 'A');
+	      });
+	      if (isOkayTarget) return; // disable double-tap-to-zoom on touchscreens
 
-	        overMap
-	            .append('div')
-	            .attr('class', 'photoviewer')
-	            .classed('al', true)       // 'al'=left,  'ar'=right
-	            .classed('hide', true)
-	            .call(ui.photoviewer);
+	      d3_event.preventDefault();
+	    });
+	    var detected = utilDetect(); // only WebKit supports gesture events
+
+	    if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
+	    // but we only need to do this on desktop Safari anyway. – #7694
+	    !detected.isMobileWebKit) {
+	      // On iOS we disable pinch-to-zoom of the UI via the `touch-action`
+	      // CSS property, but on desktop Safari we need to manually cancel the
+	      // default gesture events.
+	      container.on('gesturestart.ui gesturechange.ui gestureend.ui', function (d3_event) {
+	        // disable pinch-to-zoom of the UI via multitouch trackpads on macOS Safari
+	        d3_event.preventDefault();
+	      });
+	    }
 
+	    if ('PointerEvent' in window) {
+	      select(window).on('pointerdown.ui pointerup.ui', function (d3_event) {
+	        var pointerType = d3_event.pointerType || 'mouse';
 
-	        // Bind events
-	        window.onbeforeunload = function() {
-	            return context.save();
-	        };
-	        window.onunload = function() {
-	            context.history().unlock();
-	        };
+	        if (_lastPointerType !== pointerType) {
+	          _lastPointerType = pointerType;
+	          container.attr('pointer', pointerType);
+	        }
+	      }, true);
+	    } else {
+	      _lastPointerType = 'mouse';
+	      container.attr('pointer', 'mouse');
+	    }
 
-	        select(window)
-	            .on('resize.editor', ui.onResize);
-
-
-	        var panPixels = 80;
-	        context.keybinding()
-	            .on('⌫', function() { event.preventDefault(); })
-	            .on([_t('sidebar.key'), '`', '²', '@'], ui.sidebar.toggle)   // #5663, #6864 - common QWERTY, AZERTY
-	            .on('←', pan([panPixels, 0]))
-	            .on('↑', pan([0, panPixels]))
-	            .on('→', pan([-panPixels, 0]))
-	            .on('↓', pan([0, -panPixels]))
-	            .on(uiCmd('⌘←'), pan([map.dimensions()[0], 0]))
-	            .on(uiCmd('⌘↑'), pan([0, map.dimensions()[1]]))
-	            .on(uiCmd('⌘→'), pan([-map.dimensions()[0], 0]))
-	            .on(uiCmd('⌘↓'), pan([0, -map.dimensions()[1]]))
-	            .on(uiCmd('⌘' + _t('background.key')), function quickSwitch() {
-	                if (event) {
-	                    event.stopImmediatePropagation();
-	                    event.preventDefault();
-	                }
-	                var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
-	                if (previousBackground) {
-	                    var currentBackground = context.background().baseLayerSource();
-	                    corePreferences('background-last-used-toggle', currentBackground.id);
-	                    corePreferences('background-last-used', previousBackground.id);
-	                    context.background().baseLayerSource(previousBackground);
-	                }
-	            })
-	            .on(_t('area_fill.wireframe.key'), function toggleWireframe() {
-	                event.preventDefault();
-	                event.stopPropagation();
-	                context.map().toggleWireframe();
-	            })
-	            .on(uiCmd('⌥' + _t('area_fill.wireframe.key')), function toggleOsmData() {
-	                event.preventDefault();
-	                event.stopPropagation();
-
-	                // Don't allow layer changes while drawing - #6584
-	                var mode = context.mode();
-	                if (mode && /^draw/.test(mode.id)) { return; }
-
-	                var layer = context.layers().layer('osm');
-	                if (layer) {
-	                    layer.enabled(!layer.enabled());
-	                    if (!layer.enabled()) {
-	                        context.enter(modeBrowse(context));
-	                    }
-	                }
-	            })
-	            .on(_t('map_data.highlight_edits.key'), function toggleHighlightEdited() {
-	                event.preventDefault();
-	                context.map().toggleHighlightEdited();
-	            });
+	    container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
 
-	        context
-	            .on('enter.editor', function(entered) {
-	                container
-	                    .classed('mode-' + entered.id, true);
-	            })
-	            .on('exit.editor', function(exited) {
-	                container
-	                    .classed('mode-' + exited.id, false);
-	            });
+	    container.call(uiFullScreen(context));
+	    var map = context.map();
+	    map.redrawEnable(false); // don't draw until we've set zoom/lat/long
 
-	        context.enter(modeBrowse(context));
+	    map.on('hitMinZoom.ui', function () {
+	      ui.flash.iconName('#iD-icon-no').label(_t.html('cannot_zoom'))();
+	    });
+	    container.append('svg').attr('id', 'ideditor-defs').call(ui.svgDefs);
+	    container.append('div').attr('class', 'sidebar').call(ui.sidebar);
+	    var content = container.append('div').attr('class', 'main-content active'); // Top toolbar
+
+	    content.append('div').attr('class', 'top-toolbar-wrap').append('div').attr('class', 'top-toolbar fillD').call(uiTopToolbar(context));
+	    content.append('div').attr('class', 'main-map').attr('dir', 'ltr').call(map);
+	    var overMap = content.append('div').attr('class', 'over-map'); // HACK: Mobile Safari 14 likes to select anything selectable when long-
+	    // pressing, even if it's not targeted. This conflicts with long-pressing
+	    // to show the edit menu. We add a selectable offscreen element as the first
+	    // child to trick Safari into not showing the selection UI.  
+
+	    overMap.append('div').attr('class', 'select-trap').text('t');
+	    overMap.append('div').attr('class', 'spinner').call(uiSpinner(context));
+	    overMap.append('div').attr('class', 'attribution-wrap').attr('dir', 'ltr').call(uiAttribution(context)); // Map controls
+
+	    var controls = overMap.append('div').attr('class', 'map-controls');
+	    controls.append('div').attr('class', 'map-control zoombuttons').call(uiZoom(context));
+	    controls.append('div').attr('class', 'map-control zoom-to-selection-control').call(uiZoomToSelection(context));
+	    controls.append('div').attr('class', 'map-control geolocate-control').call(uiGeolocate(context)); // Add panes
+	    // This should happen after map is initialized, as some require surface()
+
+	    var panes = overMap.append('div').attr('class', 'map-panes');
+	    var uiPanes = [uiPaneBackground(context), uiPaneMapData(context), uiPaneIssues(context), uiPanePreferences(context), uiPaneHelp(context)];
+	    uiPanes.forEach(function (pane) {
+	      controls.append('div').attr('class', 'map-control map-pane-control ' + pane.id + '-control').call(pane.renderToggleButton);
+	      panes.call(pane.renderPane);
+	    });
+	    ui.info = uiInfo(context); // Add absolutely-positioned elements that sit on top of the map
+	    // This should happen after the map is ready (center/zoom)
 
-	        if (!_initCounter++) {
-	            if (!ui.hash.startWalkthrough) {
-	                context.container()
-	                    .call(uiSplash(context))
-	                    .call(uiRestore(context));
-	            }
+	    overMap.call(uiMapInMap(context)).call(ui.info).call(uiNotice(context));
+	    overMap.append('div').attr('class', 'photoviewer').classed('al', true) // 'al'=left,  'ar'=right
+	    .classed('hide', true).call(ui.photoviewer); // Add footer
 
-	            context.container()
-	                .call(uiShortcuts(context));
-	        }
+	    var about = content.append('div').attr('class', 'map-footer');
+	    about.append('div').attr('class', 'api-status').call(uiStatus(context));
+	    var footer = about.append('div').attr('class', 'map-footer-bar fillD');
+	    footer.append('div').attr('class', 'flash-wrap footer-hide');
+	    var footerWrap = footer.append('div').attr('class', 'main-footer-wrap footer-show');
+	    footerWrap.append('div').attr('class', 'scale-block').call(uiScale(context));
+	    var aboutList = footerWrap.append('div').attr('class', 'info-block').append('ul').attr('class', 'map-footer-list');
+	    aboutList.append('li').attr('class', 'user-list').call(uiContributors(context));
+	    var apiConnections = context.apiConnections();
 
-	        var osm = context.connection();
-	        var auth = uiLoading(context).message(_t('loading_auth')).blocking(true);
+	    if (apiConnections && apiConnections.length > 1) {
+	      aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));
+	    }
 
-	        if (osm && auth) {
-	            osm
-	                .on('authLoading.ui', function() {
-	                    context.container()
-	                        .call(auth);
-	                })
-	                .on('authDone.ui', function() {
-	                    auth.close();
-	                });
-	        }
+	    aboutList.append('li').attr('class', 'issues-info').call(uiIssuesInfo(context));
+	    aboutList.append('li').attr('class', 'feature-warning').call(uiFeatureInfo(context));
+	    var issueLinks = aboutList.append('li');
+	    issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/issues').call(svgIcon('#iD-icon-bug', 'light')).call(uiTooltip().title(_t.html('report_a_bug')).placement('top'));
+	    issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/develop/CONTRIBUTING.md#translating').call(svgIcon('#iD-icon-translate', 'light')).call(uiTooltip().title(_t.html('help_translate')).placement('top'));
+	    aboutList.append('li').attr('class', 'version').call(uiVersion(context));
 
-	        _initCounter++;
+	    if (!context.embed()) {
+	      aboutList.call(uiAccount(context));
+	    } // Setup map dimensions and move map to initial center/zoom.
+	    // This should happen after .main-content and toolbars exist.
 
-	        if (ui.hash.startWalkthrough) {
-	            ui.hash.startWalkthrough = false;
-	            context.container().call(uiIntro(context));
-	        }
 
+	    ui.onResize();
+	    map.redrawEnable(true);
+	    ui.hash = behaviorHash(context);
+	    ui.hash();
 
-	        function pan(d) {
-	            return function() {
-	                if (event.shiftKey) { return; }
-	                if (context.container().select('.combobox').size()) { return; }
-	                event.preventDefault();
-	                context.map().pan(d, 100);
-	            };
-	        }
+	    if (!ui.hash.hadHash) {
+	      map.centerZoom([0, 0], 2);
+	    } // Bind events
 
-	    }
 
+	    window.onbeforeunload = function () {
+	      return context.save();
+	    };
 
-	    var ui = {};
+	    window.onunload = function () {
+	      context.history().unlock();
+	    };
 
-	    var _loadPromise;
-	    // renders the iD interface into the container node
-	    ui.ensureLoaded = function () {
+	    select(window).on('resize.editor', function () {
+	      ui.onResize();
+	    });
+	    var panPixels = 80;
+	    context.keybinding().on('⌫', function (d3_event) {
+	      d3_event.preventDefault();
+	    }).on([_t('sidebar.key'), '`', '²', '@'], ui.sidebar.toggle) // #5663, #6864 - common QWERTY, AZERTY
+	    .on('←', pan([panPixels, 0])).on('↑', pan([0, panPixels])).on('→', pan([-panPixels, 0])).on('↓', pan([0, -panPixels])).on(uiCmd('⌥←'), pan([map.dimensions()[0], 0])).on(uiCmd('⌥↑'), pan([0, map.dimensions()[1]])).on(uiCmd('⌥→'), pan([-map.dimensions()[0], 0])).on(uiCmd('⌥↓'), pan([0, -map.dimensions()[1]])).on(uiCmd('⌘' + _t('background.key')), function quickSwitch(d3_event) {
+	      if (d3_event) {
+	        d3_event.stopImmediatePropagation();
+	        d3_event.preventDefault();
+	      }
 
-	        if (_loadPromise) { return _loadPromise; }
+	      var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
 
-	        return _loadPromise = Promise.all([
-	                // must have strings and presets before loading the UI
-	                _mainLocalizer.ensureLoaded(),
-	                _mainPresetIndex.ensureLoaded()
-	            ])
-	            .then(function () {
-	                if (!context.container().empty()) { render(context.container()); }
-	            })
-	            .catch(function (err) { return console.error(err); });  // eslint-disable-line
-	    };
+	      if (previousBackground) {
+	        var currentBackground = context.background().baseLayerSource();
+	        corePreferences('background-last-used-toggle', currentBackground.id);
+	        corePreferences('background-last-used', previousBackground.id);
+	        context.background().baseLayerSource(previousBackground);
+	      }
+	    }).on(_t('area_fill.wireframe.key'), function toggleWireframe(d3_event) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation();
+	      context.map().toggleWireframe();
+	    }).on(uiCmd('⌥' + _t('area_fill.wireframe.key')), function toggleOsmData(d3_event) {
+	      d3_event.preventDefault();
+	      d3_event.stopPropagation(); // Don't allow layer changes while drawing - #6584
 
+	      var mode = context.mode();
+	      if (mode && /^draw/.test(mode.id)) return;
+	      var layer = context.layers().layer('osm');
 
-	    // `ui.restart()` will destroy and rebuild the entire iD interface,
-	    // for example to switch the locale while iD is running.
-	    ui.restart = function() {
-	        context.keybinding().clear();
+	      if (layer) {
+	        layer.enabled(!layer.enabled());
 
-	        _loadPromise = null;
+	        if (!layer.enabled()) {
+	          context.enter(modeBrowse(context));
+	        }
+	      }
+	    }).on(_t('map_data.highlight_edits.key'), function toggleHighlightEdited(d3_event) {
+	      d3_event.preventDefault();
+	      context.map().toggleHighlightEdited();
+	    });
+	    context.on('enter.editor', function (entered) {
+	      container.classed('mode-' + entered.id, true);
+	    }).on('exit.editor', function (exited) {
+	      container.classed('mode-' + exited.id, false);
+	    });
+	    context.enter(modeBrowse(context));
 
-	        context.container().selectAll('*').remove();
+	    if (!_initCounter++) {
+	      if (!ui.hash.startWalkthrough) {
+	        context.container().call(uiSplash(context)).call(uiRestore(context));
+	      }
 
-	        ui.ensureLoaded();
-	    };
+	      context.container().call(ui.shortcuts);
+	    }
 
-	    ui.lastPointerType = function() {
-	        return _lastPointerType;
-	    };
+	    var osm = context.connection();
+	    var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);
 
-	    ui.flash = uiFlash(context);
+	    if (osm && auth) {
+	      osm.on('authLoading.ui', function () {
+	        context.container().call(auth);
+	      }).on('authDone.ui', function () {
+	        auth.close();
+	      });
+	    }
 
-	    ui.sidebar = uiSidebar(context);
+	    _initCounter++;
 
-	    ui.photoviewer = uiPhotoviewer(context);
+	    if (ui.hash.startWalkthrough) {
+	      ui.hash.startWalkthrough = false;
+	      context.container().call(uiIntro(context));
+	    }
 
-	    ui.onResize = function(withPan) {
-	        var map = context.map();
+	    function pan(d) {
+	      return function (d3_event) {
+	        if (d3_event.shiftKey) return;
+	        if (context.container().select('.combobox').size()) return;
+	        d3_event.preventDefault();
+	        context.map().pan(d, 100);
+	      };
+	    }
+	  }
 
-	        // Recalc dimensions of map and sidebar.. (`true` = force recalc)
-	        // This will call `getBoundingClientRect` and trigger reflow,
-	        //  but the values will be cached for later use.
-	        var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
-	        utilGetDimensions(context.container().select('.sidebar'), true);
+	  var ui = {};
 
-	        if (withPan !== undefined) {
-	            map.redrawEnable(false);
-	            map.pan(withPan);
-	            map.redrawEnable(true);
-	        }
-	        map.dimensions(mapDimensions);
+	  var _loadPromise; // renders the iD interface into the container node
 
-	        ui.photoviewer.onMapResize();
 
-	        // check if header or footer have overflowed
-	        ui.checkOverflow('.top-toolbar');
-	        ui.checkOverflow('.map-footer-bar');
+	  ui.ensureLoaded = function () {
+	    if (_loadPromise) return _loadPromise;
+	    return _loadPromise = Promise.all([// must have strings and presets before loading the UI
+	    _mainLocalizer.ensureLoaded(), _mainPresetIndex.ensureLoaded()]).then(function () {
+	      if (!context.container().empty()) render(context.container());
+	    })["catch"](function (err) {
+	      return console.error(err);
+	    }); // eslint-disable-line
+	  }; // `ui.restart()` will destroy and rebuild the entire iD interface,
+	  // for example to switch the locale while iD is running.
 
-	        // Use outdated code so it works on Explorer
-	        var resizeWindowEvent = document.createEvent('Event');
 
-	        resizeWindowEvent.initEvent('resizeWindow', true, true);
+	  ui.restart = function () {
+	    context.keybinding().clear();
+	    _loadPromise = null;
+	    context.container().selectAll('*').remove();
+	    ui.ensureLoaded();
+	  };
 
-	        document.dispatchEvent(resizeWindowEvent);
-	    };
+	  ui.lastPointerType = function () {
+	    return _lastPointerType;
+	  };
 
+	  ui.svgDefs = svgDefs(context);
+	  ui.flash = uiFlash(context);
+	  ui.sidebar = uiSidebar(context);
+	  ui.photoviewer = uiPhotoviewer(context);
+	  ui.shortcuts = uiShortcuts(context);
 
-	    // Call checkOverflow when resizing or whenever the contents change.
-	    ui.checkOverflow = function(selector, reset) {
-	        if (reset) {
-	            delete _needWidth[selector];
-	        }
+	  ui.onResize = function (withPan) {
+	    var map = context.map(); // Recalc dimensions of map and sidebar.. (`true` = force recalc)
+	    // This will call `getBoundingClientRect` and trigger reflow,
+	    //  but the values will be cached for later use.
 
-	        var element = select(selector);
-	        var scrollWidth = element.property('scrollWidth');
-	        var clientWidth = element.property('clientWidth');
-	        var needed = _needWidth[selector] || scrollWidth;
+	    var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
+	    utilGetDimensions(context.container().select('.sidebar'), true);
 
-	        if (scrollWidth > clientWidth) {    // overflow happening
-	            element.classed('narrow', true);
-	            if (!_needWidth[selector]) {
-	                _needWidth[selector] = scrollWidth;
-	            }
+	    if (withPan !== undefined) {
+	      map.redrawEnable(false);
+	      map.pan(withPan);
+	      map.redrawEnable(true);
+	    }
 
-	        } else if (scrollWidth >= needed) {
-	            element.classed('narrow', false);
-	        }
-	    };
+	    map.dimensions(mapDimensions);
+	    ui.photoviewer.onMapResize(); // check if header or footer have overflowed
 
-	    ui.togglePanes = function(showPane) {
-	        var shownPanes = context.container().selectAll('.map-pane.shown');
+	    ui.checkOverflow('.top-toolbar');
+	    ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer
 
-	        var side = _mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left';
+	    var resizeWindowEvent = document.createEvent('Event');
+	    resizeWindowEvent.initEvent('resizeWindow', true, true);
+	    document.dispatchEvent(resizeWindowEvent);
+	  }; // Call checkOverflow when resizing or whenever the contents change.
 
-	        shownPanes
-	            .classed('shown', false);
 
-	        context.container().selectAll('.map-pane-control button')
-	            .classed('active', false);
+	  ui.checkOverflow = function (selector, reset) {
+	    if (reset) {
+	      delete _needWidth[selector];
+	    }
 
-	        if (showPane) {
-	            shownPanes
-	                .style('display', 'none')
-	                .style(side, '-500px');
+	    var element = select(selector);
+	    var scrollWidth = element.property('scrollWidth');
+	    var clientWidth = element.property('clientWidth');
+	    var needed = _needWidth[selector] || scrollWidth;
 
-	            context.container().selectAll('.' + showPane.attr('pane') + '-control button')
-	                .classed('active', true);
+	    if (scrollWidth > clientWidth) {
+	      // overflow happening
+	      element.classed('narrow', true);
 
-	            showPane
-	                .classed('shown', true)
-	                .style('display', 'block');
-	            if (shownPanes.empty()) {
-	                showPane
-	                    .style('display', 'block')
-	                    .style(side, '-500px')
-	                    .transition()
-	                    .duration(200)
-	                    .style(side, '0px');
-	            } else {
-	                showPane
-	                    .style(side, '0px');
-	            }
-	        } else {
-	            shownPanes
-	                .style('display', 'block')
-	                .style(side, '0px')
-	                .transition()
-	                .duration(200)
-	                .style(side, '-500px')
-	                .on('end', function() {
-	                    select(this).style('display', 'none');
-	                });
-	        }
-	    };
+	      if (!_needWidth[selector]) {
+	        _needWidth[selector] = scrollWidth;
+	      }
+	    } else if (scrollWidth >= needed) {
+	      element.classed('narrow', false);
+	    }
+	  };
 
+	  ui.togglePanes = function (showPane) {
+	    var hidePanes = context.container().selectAll('.map-pane.shown');
+	    var side = _mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left';
+	    hidePanes.classed('shown', false).classed('hide', true);
+	    context.container().selectAll('.map-pane-control button').classed('active', false);
 
-	    var _editMenu = uiEditMenu(context);
+	    if (showPane) {
+	      hidePanes.classed('shown', false).classed('hide', true).style(side, '-500px');
+	      context.container().selectAll('.' + showPane.attr('pane') + '-control button').classed('active', true);
+	      showPane.classed('shown', true).classed('hide', false);
 
-	    ui.editMenu = function() {
-	        return _editMenu;
-	    };
+	      if (hidePanes.empty()) {
+	        showPane.style(side, '-500px').transition().duration(200).style(side, '0px');
+	      } else {
+	        showPane.style(side, '0px');
+	      }
+	    } else {
+	      hidePanes.classed('shown', true).classed('hide', false).style(side, '0px').transition().duration(200).style(side, '-500px').on('end', function () {
+	        select(this).classed('shown', false).classed('hide', true);
+	      });
+	    }
+	  };
 
-	    ui.showEditMenu = function(anchorPoint, triggerType, operations) {
+	  var _editMenu = uiEditMenu(context);
 
-	        // remove any displayed menu
-	        ui.closeEditMenu();
+	  ui.editMenu = function () {
+	    return _editMenu;
+	  };
 
-	        if (!operations && context.mode().operations) { operations = context.mode().operations(); }
-	        if (!operations || !operations.length) { return; }
+	  ui.showEditMenu = function (anchorPoint, triggerType, operations) {
+	    // remove any displayed menu
+	    ui.closeEditMenu();
+	    if (!operations && context.mode().operations) operations = context.mode().operations();
+	    if (!operations || !operations.length) return; // disable menu if in wide selection, for example
 
-	        // disable menu if in wide selection, for example
-	        if (!context.map().editableDataEnabled()) { return; }
+	    if (!context.map().editableDataEnabled()) return;
+	    var surfaceNode = context.surface().node();
 
-	        var surfaceNode = context.surface().node();
-	        if (surfaceNode.focus) {   // FF doesn't support it
-	            // focus the surface or else clicking off the menu may not trigger modeBrowse
-	            surfaceNode.focus();
-	        }
+	    if (surfaceNode.focus) {
+	      // FF doesn't support it
+	      // focus the surface or else clicking off the menu may not trigger modeBrowse
+	      surfaceNode.focus();
+	    }
 
-	        operations.forEach(function(operation) {
-	            if (operation.point) { operation.point(anchorPoint); }
-	        });
+	    operations.forEach(function (operation) {
+	      if (operation.point) operation.point(anchorPoint);
+	    });
 
-	        _editMenu
-	            .anchorLoc(anchorPoint)
-	            .triggerType(triggerType)
-	            .operations(operations);
+	    _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu
 
-	        // render the menu
-	        context.map().supersurface.call(_editMenu);
-	    };
 
-	    ui.closeEditMenu = function() {
-	        // remove any existing menu no matter how it was added
-	        context.map().supersurface
-	            .select('.edit-menu').remove();
-	    };
+	    context.map().supersurface.call(_editMenu);
+	  };
 
+	  ui.closeEditMenu = function () {
+	    // remove any existing menu no matter how it was added
+	    context.map().supersurface.select('.edit-menu').remove();
+	  };
 
-	    var _saveLoading = select(null);
+	  var _saveLoading = select(null);
 
-	    context.uploader()
-	        .on('saveStarted.ui', function() {
-	            _saveLoading = uiLoading(context)
-	                .message(_t('save.uploading'))
-	                .blocking(true);
-	            context.container().call(_saveLoading);  // block input during upload
-	        })
-	        .on('saveEnded.ui', function() {
-	            _saveLoading.close();
-	            _saveLoading = select(null);
-	        });
+	  context.uploader().on('saveStarted.ui', function () {
+	    _saveLoading = uiLoading(context).message(_t.html('save.uploading')).blocking(true);
+	    context.container().call(_saveLoading); // block input during upload
+	  }).on('saveEnded.ui', function () {
+	    _saveLoading.close();
 
-	    return ui;
+	    _saveLoading = select(null);
+	  });
+	  return ui;
 	}
 
 	function coreContext() {
-	  var this$1 = this;
+	  var _this = this;
 
 	  var dispatch$1 = dispatch('enter', 'exit', 'change');
 	  var context = utilRebind({}, dispatch$1, 'on');
+
 	  var _deferred = new Set();
 
-	  context.version = '2.18.1';
-	  context.privacyVersion = '20200407';
+	  context.version = '2.19.0';
+	  context.privacyVersion = '20200407'; // iD will alter the hash so cache the parameters intended to setup the session
 
-	  // iD will alter the hash so cache the parameters intended to setup the session
 	  context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
-
 	  context.isFirstSession = !corePreferences('sawSplash') && !corePreferences('sawPrivacyVersion');
-
-
 	  /* Changeset */
 	  // An osmChangeset object. Not loaded until needed.
-	  context.changeset = null;
 
+	  context.changeset = null;
 	  var _defaultChangesetComment = context.initialHashParams.comment;
 	  var _defaultChangesetSource = context.initialHashParams.source;
 	  var _defaultChangesetHashtags = context.initialHashParams.hashtags;
-	  context.defaultChangesetComment = function(val) {
-	    if (!arguments.length) { return _defaultChangesetComment; }
+
+	  context.defaultChangesetComment = function (val) {
+	    if (!arguments.length) return _defaultChangesetComment;
 	    _defaultChangesetComment = val;
 	    return context;
 	  };
-	  context.defaultChangesetSource = function(val) {
-	    if (!arguments.length) { return _defaultChangesetSource; }
+
+	  context.defaultChangesetSource = function (val) {
+	    if (!arguments.length) return _defaultChangesetSource;
 	    _defaultChangesetSource = val;
 	    return context;
 	  };
-	  context.defaultChangesetHashtags = function(val) {
-	    if (!arguments.length) { return _defaultChangesetHashtags; }
+
+	  context.defaultChangesetHashtags = function (val) {
+	    if (!arguments.length) return _defaultChangesetHashtags;
 	    _defaultChangesetHashtags = val;
 	    return context;
 	  };
-
 	  /* Document title */
-	  /* (typically shown as the label for the browser window/tab) */
 
+	  /* (typically shown as the label for the browser window/tab) */
 	  // If true, iD will update the title based on what the user is doing
+
+
 	  var _setsDocumentTitle = true;
-	  context.setsDocumentTitle = function(val) {
-	    if (!arguments.length) { return _setsDocumentTitle; }
+
+	  context.setsDocumentTitle = function (val) {
+	    if (!arguments.length) return _setsDocumentTitle;
 	    _setsDocumentTitle = val;
 	    return context;
-	  };
-	  // The part of the title that is always the same
+	  }; // The part of the title that is always the same
+
+
 	  var _documentTitleBase = document.title;
-	  context.documentTitleBase = function(val) {
-	    if (!arguments.length) { return _documentTitleBase; }
+
+	  context.documentTitleBase = function (val) {
+	    if (!arguments.length) return _documentTitleBase;
 	    _documentTitleBase = val;
 	    return context;
 	  };
+	  /* User interface and keybinding */
 
 
-	  /* User interface and keybinding */
 	  var _ui;
-	  context.ui = function () { return _ui; };
-	  context.lastPointerType = function () { return _ui.lastPointerType(); };
+
+	  context.ui = function () {
+	    return _ui;
+	  };
+
+	  context.lastPointerType = function () {
+	    return _ui.lastPointerType();
+	  };
 
 	  var _keybinding = utilKeybinding('context');
-	  context.keybinding = function () { return _keybinding; };
-	  select(document).call(_keybinding);
 
+	  context.keybinding = function () {
+	    return _keybinding;
+	  };
 
+	  select(document).call(_keybinding);
 	  /* Straight accessors. Avoid using these if you can. */
-	  var _connection;
+	  // Instantiate the connection here because it doesn't require passing in
+	  // `context` and it's needed for pre-init calls like `preauth`
+
+	  var _connection = services.osm;
+
 	  var _history;
+
 	  var _validator;
+
 	  var _uploader;
-	  context.connection = function () { return _connection; };
-	  context.history = function () { return _history; };
-	  context.validator = function () { return _validator; };
-	  context.uploader = function () { return _uploader; };
 
+	  context.connection = function () {
+	    return _connection;
+	  };
+
+	  context.history = function () {
+	    return _history;
+	  };
+
+	  context.validator = function () {
+	    return _validator;
+	  };
+
+	  context.uploader = function () {
+	    return _uploader;
+	  };
 	  /* Connection */
+
+
 	  context.preauth = function (options) {
 	    if (_connection) {
-	      _connection.switch(options);
+	      _connection["switch"](options);
 	    }
+
 	    return context;
 	  };
-
 	  /* connection options for source switcher (optional) */
+
+
 	  var _apiConnections;
-	  context.apiConnections = function(val) {
-	    if (!arguments.length) { return _apiConnections; }
+
+	  context.apiConnections = function (val) {
+	    if (!arguments.length) return _apiConnections;
 	    _apiConnections = val;
 	    return context;
-	  };
+	  }; // A string or array or locale codes to prefer over the browser's settings
 
 
-	  // A string or array or locale codes to prefer over the browser's settings
-	  context.locale = function(locale) {
-	    if (!arguments.length) { return _mainLocalizer.localeCode(); }
+	  context.locale = function (locale) {
+	    if (!arguments.length) return _mainLocalizer.localeCode();
 	    _mainLocalizer.preferredLocaleCodes(locale);
 	    return context;
 	  };
 
-
 	  function afterLoad(cid, callback) {
 	    return function (err, result) {
 	      if (err) {
@@ -118087,53 +98230,65 @@
 	            _connection.logout();
 	          }
 	        }
+
 	        if (typeof callback === 'function') {
 	          callback(err);
 	        }
-	        return;
 
+	        return;
 	      } else if (_connection && _connection.getConnectionId() !== cid) {
 	        if (typeof callback === 'function') {
-	          callback({ message: 'Connection Switched', status: -1 });
+	          callback({
+	            message: 'Connection Switched',
+	            status: -1
+	          });
 	        }
-	        return;
 
+	        return;
 	      } else {
 	        _history.merge(result.data, result.extent);
+
 	        if (typeof callback === 'function') {
 	          callback(err, result);
 	        }
+
 	        return;
 	      }
 	    };
 	  }
 
-
 	  context.loadTiles = function (projection, callback) {
 	    var handle = window.requestIdleCallback(function () {
-	      _deferred.delete(handle);
+	      _deferred["delete"](handle);
+
 	      if (_connection && context.editableDataEnabled()) {
 	        var cid = _connection.getConnectionId();
+
 	        _connection.loadTiles(projection, afterLoad(cid, callback));
 	      }
 	    });
+
 	    _deferred.add(handle);
 	  };
 
 	  context.loadTileAtLoc = function (loc, callback) {
 	    var handle = window.requestIdleCallback(function () {
-	      _deferred.delete(handle);
+	      _deferred["delete"](handle);
+
 	      if (_connection && context.editableDataEnabled()) {
 	        var cid = _connection.getConnectionId();
+
 	        _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
 	      }
 	    });
+
 	    _deferred.add(handle);
 	  };
 
 	  context.loadEntity = function (entityID, callback) {
 	    if (_connection) {
 	      var cid = _connection.getConnectionId();
+
 	      _connection.loadEntity(entityID, afterLoad(cid, callback));
 	    }
 	  };
@@ -118141,8 +98296,11 @@
 	  context.zoomToEntity = function (entityID, zoomTo) {
 	    if (zoomTo !== false) {
 	      context.loadEntity(entityID, function (err, result) {
-	        if (err) { return; }
-	        var entity = result.data.find(function (e) { return e.id === entityID; });
+	        if (err) return;
+	        var entity = result.data.find(function (e) {
+	          return e.id === entityID;
+	        });
+
 	        if (entity) {
 	          _map.zoomTo(entity);
 	        }
@@ -118150,8 +98308,10 @@
 	    }
 
 	    _map.on('drawn.zoomToEntity', function () {
-	      if (!context.hasEntity(entityID)) { return; }
+	      if (!context.hasEntity(entityID)) return;
+
 	      _map.on('drawn.zoomToEntity', null);
+
 	      context.on('enter.zoomToEntity', null);
 	      context.enter(modeSelect(context, [entityID]));
 	    });
@@ -118159,25 +98319,37 @@
 	    context.on('enter.zoomToEntity', function () {
 	      if (_mode.id !== 'browse') {
 	        _map.on('drawn.zoomToEntity', null);
+
 	        context.on('enter.zoomToEntity', null);
 	      }
 	    });
 	  };
 
 	  var _minEditableZoom = 16;
-	  context.minEditableZoom = function(val) {
-	    if (!arguments.length) { return _minEditableZoom; }
+
+	  context.minEditableZoom = function (val) {
+	    if (!arguments.length) return _minEditableZoom;
 	    _minEditableZoom = val;
+
 	    if (_connection) {
 	      _connection.tileZoom(val);
 	    }
+
 	    return context;
+	  }; // String length limits in Unicode characters, not JavaScript UTF-16 code units
+
+
+	  context.maxCharsForTagKey = function () {
+	    return 255;
+	  };
+
+	  context.maxCharsForTagValue = function () {
+	    return 255;
 	  };
 
-	  // String length limits in Unicode characters, not JavaScript UTF-16 code units
-	  context.maxCharsForTagKey = function () { return 255; };
-	  context.maxCharsForTagValue = function () { return 255; };
-	  context.maxCharsForRelationRole = function () { return 255; };
+	  context.maxCharsForRelationRole = function () {
+	    return 255;
+	  };
 
 	  function cleanOsmString(val, maxChars) {
 	    // be lenient with input
@@ -118185,46 +98357,53 @@
 	      val = '';
 	    } else {
 	      val = val.toString();
-	    }
+	    } // remove whitespace
+
 
-	    // remove whitespace
-	    val = val.trim();
+	    val = val.trim(); // use the canonical form of the string
 
-	    // use the canonical form of the string
-	    if (val.normalize) { val = val.normalize('NFC'); }
+	    if (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters
 
-	    // trim to the number of allowed characters
 	    return utilUnicodeCharsTruncated(val, maxChars);
 	  }
-	  context.cleanTagKey = function (val) { return cleanOsmString(val, context.maxCharsForTagKey()); };
-	  context.cleanTagValue = function (val) { return cleanOsmString(val, context.maxCharsForTagValue()); };
-	  context.cleanRelationRole = function (val) { return cleanOsmString(val, context.maxCharsForRelationRole()); };
 
+	  context.cleanTagKey = function (val) {
+	    return cleanOsmString(val, context.maxCharsForTagKey());
+	  };
+
+	  context.cleanTagValue = function (val) {
+	    return cleanOsmString(val, context.maxCharsForTagValue());
+	  };
 
+	  context.cleanRelationRole = function (val) {
+	    return cleanOsmString(val, context.maxCharsForRelationRole());
+	  };
 	  /* History */
+
+
 	  var _inIntro = false;
-	  context.inIntro = function(val) {
-	    if (!arguments.length) { return _inIntro; }
+
+	  context.inIntro = function (val) {
+	    if (!arguments.length) return _inIntro;
 	    _inIntro = val;
 	    return context;
-	  };
-
-	  // Immediately save the user's history to localstorage, if possible
+	  }; // Immediately save the user's history to localstorage, if possible
 	  // This is called someteimes, but also on the `window.onbeforeunload` handler
+
+
 	  context.save = function () {
 	    // no history save, no message onbeforeunload
-	    if (_inIntro || context.container().select('.modal').size()) { return; }
-
+	    if (_inIntro || context.container().select('.modal').size()) return;
 	    var canSave;
+
 	    if (_mode && _mode.id === 'save') {
-	      canSave = false;
+	      canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200
 
-	      // Attempt to prevent user from creating duplicate changes - see #5200
 	      if (services.osm && services.osm.isChangesetInflight()) {
 	        _history.clearSaved();
+
 	        return;
 	      }
-
 	    } else {
 	      canSave = context.selectedIDs().every(function (id) {
 	        var entity = context.hasEntity(id);
@@ -118235,236 +98414,308 @@
 	    if (canSave) {
 	      _history.save();
 	    }
+
 	    if (_history.hasChanges()) {
 	      return _t('save.unsaved_changes');
 	    }
-	  };
-
-	  // Debounce save, since it's a synchronous localStorage write,
+	  }; // Debounce save, since it's a synchronous localStorage write,
 	  // and history changes can happen frequently (e.g. when dragging).
+
+
 	  context.debouncedSave = debounce(context.save, 350);
 
 	  function withDebouncedSave(fn) {
-	    return function() {
+	    return function () {
 	      var result = fn.apply(_history, arguments);
 	      context.debouncedSave();
 	      return result;
 	    };
 	  }
-
-
 	  /* Graph */
-	  context.hasEntity = function (id) { return _history.graph().hasEntity(id); };
-	  context.entity = function (id) { return _history.graph().entity(id); };
 
 
+	  context.hasEntity = function (id) {
+	    return _history.graph().hasEntity(id);
+	  };
+
+	  context.entity = function (id) {
+	    return _history.graph().entity(id);
+	  };
 	  /* Modes */
+
+
 	  var _mode;
-	  context.mode = function () { return _mode; };
+
+	  context.mode = function () {
+	    return _mode;
+	  };
+
 	  context.enter = function (newMode) {
 	    if (_mode) {
 	      _mode.exit();
-	      dispatch$1.call('exit', this$1, _mode);
+
+	      dispatch$1.call('exit', _this, _mode);
 	    }
 
 	    _mode = newMode;
+
 	    _mode.enter();
-	    dispatch$1.call('enter', this$1, _mode);
+
+	    dispatch$1.call('enter', _this, _mode);
+	  };
+
+	  context.selectedIDs = function () {
+	    return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
 	  };
 
-	  context.selectedIDs = function () { return (_mode && _mode.selectedIDs && _mode.selectedIDs()) || []; };
-	  context.activeID = function () { return _mode && _mode.activeID && _mode.activeID(); };
+	  context.activeID = function () {
+	    return _mode && _mode.activeID && _mode.activeID();
+	  };
 
 	  var _selectedNoteID;
-	  context.selectedNoteID = function(noteID) {
-	    if (!arguments.length) { return _selectedNoteID; }
+
+	  context.selectedNoteID = function (noteID) {
+	    if (!arguments.length) return _selectedNoteID;
 	    _selectedNoteID = noteID;
 	    return context;
-	  };
+	  }; // NOTE: Don't change the name of this until UI v3 is merged
+
 
-	  // NOTE: Don't change the name of this until UI v3 is merged
 	  var _selectedErrorID;
-	  context.selectedErrorID = function(errorID) {
-	    if (!arguments.length) { return _selectedErrorID; }
+
+	  context.selectedErrorID = function (errorID) {
+	    if (!arguments.length) return _selectedErrorID;
 	    _selectedErrorID = errorID;
 	    return context;
 	  };
-
-
 	  /* Behaviors */
-	  context.install = function (behavior) { return context.surface().call(behavior); };
-	  context.uninstall = function (behavior) { return context.surface().call(behavior.off); };
 
 
+	  context.install = function (behavior) {
+	    return context.surface().call(behavior);
+	  };
+
+	  context.uninstall = function (behavior) {
+	    return context.surface().call(behavior.off);
+	  };
 	  /* Copy/Paste */
+
+
 	  var _copyGraph;
-	  context.copyGraph = function () { return _copyGraph; };
+
+	  context.copyGraph = function () {
+	    return _copyGraph;
+	  };
 
 	  var _copyIDs = [];
-	  context.copyIDs = function(val) {
-	    if (!arguments.length) { return _copyIDs; }
+
+	  context.copyIDs = function (val) {
+	    if (!arguments.length) return _copyIDs;
 	    _copyIDs = val;
 	    _copyGraph = _history.graph();
 	    return context;
 	  };
 
 	  var _copyLonLat;
-	  context.copyLonLat = function(val) {
-	    if (!arguments.length) { return _copyLonLat; }
+
+	  context.copyLonLat = function (val) {
+	    if (!arguments.length) return _copyLonLat;
 	    _copyLonLat = val;
 	    return context;
 	  };
+	  /* Background */
 
 
-	  /* Background */
 	  var _background;
-	  context.background = function () { return _background; };
-
 
+	  context.background = function () {
+	    return _background;
+	  };
 	  /* Features */
+
+
 	  var _features;
-	  context.features = function () { return _features; };
+
+	  context.features = function () {
+	    return _features;
+	  };
+
 	  context.hasHiddenConnections = function (id) {
 	    var graph = _history.graph();
+
 	    var entity = graph.entity(id);
 	    return _features.hasHiddenConnections(entity, graph);
 	  };
+	  /* Photos */
 
 
-	  /* Photos */
 	  var _photos;
-	  context.photos = function () { return _photos; };
-
 
+	  context.photos = function () {
+	    return _photos;
+	  };
 	  /* Map */
+
+
 	  var _map;
-	  context.map = function () { return _map; };
-	  context.layers = function () { return _map.layers(); };
-	  context.surface = function () { return _map.surface; };
-	  context.editableDataEnabled = function () { return _map.editableDataEnabled(); };
-	  context.surfaceRect = function () { return _map.surface.node().getBoundingClientRect(); };
+
+	  context.map = function () {
+	    return _map;
+	  };
+
+	  context.layers = function () {
+	    return _map.layers();
+	  };
+
+	  context.surface = function () {
+	    return _map.surface;
+	  };
+
+	  context.editableDataEnabled = function () {
+	    return _map.editableDataEnabled();
+	  };
+
+	  context.surfaceRect = function () {
+	    return _map.surface.node().getBoundingClientRect();
+	  };
+
 	  context.editable = function () {
 	    // don't allow editing during save
 	    var mode = context.mode();
-	    if (!mode || mode.id === 'save') { return false; }
+	    if (!mode || mode.id === 'save') return false;
 	    return _map.editableDataEnabled();
 	  };
+	  /* Debug */
 
 
-	  /* Debug */
 	  var _debugFlags = {
-	    tile: false,        // tile boundaries
-	    collision: false,   // label collision bounding boxes
-	    imagery: false,     // imagery bounding polygons
-	    target: false,      // touch targets
-	    downloaded: false   // downloaded data from osm
-	  };
-	  context.debugFlags = function () { return _debugFlags; };
-	  context.getDebug = function (flag) { return flag && _debugFlags[flag]; };
-	  context.setDebug = function(flag, val) {
-	    if (arguments.length === 1) { val = true; }
+	    tile: false,
+	    // tile boundaries
+	    collision: false,
+	    // label collision bounding boxes
+	    imagery: false,
+	    // imagery bounding polygons
+	    target: false,
+	    // touch targets
+	    downloaded: false // downloaded data from osm
+
+	  };
+
+	  context.debugFlags = function () {
+	    return _debugFlags;
+	  };
+
+	  context.getDebug = function (flag) {
+	    return flag && _debugFlags[flag];
+	  };
+
+	  context.setDebug = function (flag, val) {
+	    if (arguments.length === 1) val = true;
 	    _debugFlags[flag] = val;
 	    dispatch$1.call('change');
 	    return context;
 	  };
+	  /* Container */
 
 
-	  /* Container */
 	  var _container = select(null);
-	  context.container = function(val) {
-	    if (!arguments.length) { return _container; }
+
+	  context.container = function (val) {
+	    if (!arguments.length) return _container;
 	    _container = val;
+
 	    _container.classed('ideditor', true);
+
 	    return context;
 	  };
-	  context.containerNode = function(val) {
-	    if (!arguments.length) { return context.container().node(); }
+
+	  context.containerNode = function (val) {
+	    if (!arguments.length) return context.container().node();
 	    context.container(select(val));
 	    return context;
 	  };
 
 	  var _embed;
-	  context.embed = function(val) {
-	    if (!arguments.length) { return _embed; }
+
+	  context.embed = function (val) {
+	    if (!arguments.length) return _embed;
 	    _embed = val;
 	    return context;
 	  };
+	  /* Assets */
 
 
-	  /* Assets */
 	  var _assetPath = '';
-	  context.assetPath = function(val) {
-	    if (!arguments.length) { return _assetPath; }
+
+	  context.assetPath = function (val) {
+	    if (!arguments.length) return _assetPath;
 	    _assetPath = val;
 	    _mainFileFetcher.assetPath(val);
 	    return context;
 	  };
 
 	  var _assetMap = {};
-	  context.assetMap = function(val) {
-	    if (!arguments.length) { return _assetMap; }
+
+	  context.assetMap = function (val) {
+	    if (!arguments.length) return _assetMap;
 	    _assetMap = val;
 	    _mainFileFetcher.assetMap(val);
 	    return context;
 	  };
 
 	  context.asset = function (val) {
-	    if (/^http(s)?:\/\//i.test(val)) { return val; }
+	    if (/^http(s)?:\/\//i.test(val)) return val;
 	    var filename = _assetPath + val;
 	    return _assetMap[filename] || filename;
 	  };
 
-	  context.imagePath = function (val) { return context.asset(("img/" + val)); };
+	  context.imagePath = function (val) {
+	    return context.asset("img/".concat(val));
+	  };
+	  /* reset (aka flush) */
 
 
-	  /* reset (aka flush) */
 	  context.reset = context.flush = function () {
 	    context.debouncedSave.cancel();
-
 	    Array.from(_deferred).forEach(function (handle) {
 	      window.cancelIdleCallback(handle);
-	      _deferred.delete(handle);
-	    });
 
+	      _deferred["delete"](handle);
+	    });
 	    Object.values(services).forEach(function (service) {
 	      if (service && typeof service.reset === 'function') {
 	        service.reset(context);
 	      }
 	    });
-
 	    context.changeset = null;
 
 	    _validator.reset();
+
 	    _features.reset();
+
 	    _history.reset();
-	    _uploader.reset();
 
-	    // don't leave stale state in the inspector
-	    context.container().select('.inspector-wrap *').remove();
+	    _uploader.reset(); // don't leave stale state in the inspector
+
 
+	    context.container().select('.inspector-wrap *').remove();
 	    return context;
 	  };
+	  /* Projections */
 
 
-	  /* Projections */
 	  context.projection = geoRawMercator();
 	  context.curtainProjection = geoRawMercator();
-
-
 	  /* Init */
-	  context.init = function () {
 
+	  context.init = function () {
 	    instantiateInternal();
-
 	    initializeDependents();
-
-	    return context;
-
-	    // Load variables and properties. No property of `context` should be accessed
+	    return context; // Load variables and properties. No property of `context` should be accessed
 	    // until this is complete since load statuses are indeterminate. The order
 	    // of instantiation shouldn't matter.
-	    function instantiateInternal() {
 
+	    function instantiateInternal() {
 	      _history = coreHistory(context);
 	      context.graph = _history.graph;
 	      context.pauseChangeDispatch = _history.pauseChangeDispatch;
@@ -118475,37 +98726,32 @@
 	      context.overwrite = withDebouncedSave(_history.overwrite);
 	      context.undo = withDebouncedSave(_history.undo);
 	      context.redo = withDebouncedSave(_history.redo);
-
 	      _validator = coreValidator(context);
 	      _uploader = coreUploader(context);
-
 	      _background = rendererBackground(context);
 	      _features = rendererFeatures(context);
 	      _map = rendererMap(context);
 	      _photos = rendererPhotos(context);
-
 	      _ui = uiInit(context);
+	    } // Set up objects that might need to access properties of `context`. The order
+	    // might matter if dependents make calls to each other. Be wary of async calls.
 
-	      _connection = services.osm;
-	    }
 
-	    // Set up objects that might need to access properties of `context`. The order
-	    // might matter if dependents make calls to each other. Be wary of async calls.
 	    function initializeDependents() {
-
 	      if (context.initialHashParams.presets) {
 	        _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
 	      }
 
 	      if (context.initialHashParams.locale) {
 	        _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
-	      }
+	      } // kick off some async work
+
 
-	      // kick off some async work
 	      _mainLocalizer.ensureLoaded();
+
 	      _background.ensureLoaded();
-	      _mainPresetIndex.ensureLoaded();
 
+	      _mainPresetIndex.ensureLoaded();
 	      Object.values(services).forEach(function (service) {
 	        if (service && typeof service.init === 'function') {
 	          service.init();
@@ -118513,35 +98759,39 @@
 	      });
 
 	      _map.init();
+
 	      _validator.init();
+
 	      _features.init();
-	      _photos.init();
 
 	      if (services.maprules && context.initialHashParams.maprules) {
-	        d3_json(context.initialHashParams.maprules)
-	          .then(function (mapcss) {
-	            services.maprules.init();
-	            mapcss.forEach(function (mapcssSelector) { return services.maprules.addRule(mapcssSelector); });
-	          })
-	          .catch(function () { /* ignore */ });
-	      }
+	        d3_json(context.initialHashParams.maprules).then(function (mapcss) {
+	          services.maprules.init();
+	          mapcss.forEach(function (mapcssSelector) {
+	            return services.maprules.addRule(mapcssSelector);
+	          });
+	        })["catch"](function () {
+	          /* ignore */
+	        });
+	      } // if the container isn't available, e.g. when testing, don't load the UI
+
 
-	      // if the container isn't available, e.g. when testing, don't load the UI
-	      if (!context.container().empty()) { _ui.ensureLoaded(); }
+	      if (!context.container().empty()) {
+	        _ui.ensureLoaded().then(function () {
+	          _photos.init();
+	        });
+	      }
 	    }
 	  };
 
-
 	  return context;
 	}
 
-	// When `debug = true`, we use `Object.freeze` on immutables in iD.
 	// This is only done in testing because of the performance penalty.
-	var debug = false;
+
+	var debug = false; // Reexport just what our tests use, see #4379
 	var d3 = {
-	  customEvent: customEvent,
-	  dispatch:  dispatch,
-	  event:  event,
+	  dispatch: dispatch,
 	  geoMercator: mercator,
 	  geoProjection: projection,
 	  polygonArea: d3_polygonArea,
@@ -118587,6 +98837,7 @@
 		actionReverse: actionReverse,
 		actionRevert: actionRevert,
 		actionRotate: actionRotate,
+		actionScale: actionScale,
 		actionSplit: actionSplit,
 		actionStraightenNodes: actionStraightenNodes,
 		actionStraightenWay: actionStraightenWay,
@@ -118784,6 +99035,7 @@
 		uiFieldDefaultCheck: uiFieldCheck,
 		uiFieldOnewayCheck: uiFieldCheck,
 		uiFieldCheck: uiFieldCheck,
+		uiFieldManyCombo: uiFieldCombo,
 		uiFieldMultiCombo: uiFieldCombo,
 		uiFieldNetworkCombo: uiFieldCombo,
 		uiFieldSemiCombo: uiFieldCombo,
@@ -118973,24 +99225,21 @@
 		validationUnsquareWay: validationUnsquareWay
 	});
 
-	// polyfill requestIdleCallback
-	window.requestIdleCallback = window.requestIdleCallback ||
-	    function(cb) {
-	        var start = Date.now();
-	        return window.requestAnimationFrame(function() {
-	            cb({
-	                didTimeout: false,
-	                timeRemaining: function() {
-	                    return Math.max(0, 50 - (Date.now() - start));
-	                }
-	            });
-	        });
-	    };
+	window.requestIdleCallback = window.requestIdleCallback || function (cb) {
+	  var start = Date.now();
+	  return window.requestAnimationFrame(function () {
+	    cb({
+	      didTimeout: false,
+	      timeRemaining: function timeRemaining() {
+	        return Math.max(0, 50 - (Date.now() - start));
+	      }
+	    });
+	  });
+	};
 
-	window.cancelIdleCallback = window.cancelIdleCallback ||
-	    function(id) {
-	        window.cancelAnimationFrame(id);
-	    };
+	window.cancelIdleCallback = window.cancelIdleCallback || function (id) {
+	  window.cancelAnimationFrame(id);
+	};
 	window.iD = iD;
 
 }());