X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/c24c2e481cc6d27e76274ed4e32668a4690a7788..b0711f5f3ae510936893c408cd45f25c101a46f1:/vendor/assets/iD/iD.js

diff --git a/vendor/assets/iD/iD.js b/vendor/assets/iD/iD.js
index ba3246b5f..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;
+	} : $parseFloat;
+
+	// `parseFloat` method
+	// https://tc39.github.io/ecma262/#sec-parsefloat-string
+	_export({ global: true, forced: parseFloat != numberParseFloat }, {
+	  parseFloat: numberParseFloat
+	});
+
 	/*
 	Order the nodes of a way in reverse order and reverse any direction dependent tags
 	other than `oneway`. (We assume that correcting a backwards oneway is the primary
@@ -6037,112065 +7686,90541 @@
 	    http://wiki.openstreetmap.org/wiki/Key:traffic_sign#On_a_way_or_area
 	*/
 	function actionReverse(entityID, options) {
-	    var ignoreKey = /^.*(_|:)?(description|name|note|website|ref|source|comment|watch|attribution)(_|:)?/;
-	    var numeric = /^([+\-]?)(?=[\d.])/;
-	    var directionKey = /direction$/;
-	    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];
-	    });
-	  };
+	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;
 	}
 
-	// [[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]
+	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
 	  });
 	}
-
-	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 init(node, id) {
+	  var schedule = get$4(node, id);
+	  if (schedule.state > CREATED) throw new Error("too late; already scheduled");
+	  return schedule;
 	}
-
-	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 set$4(node, id) {
+	  var schedule = get$4(node, id);
+	  if (schedule.state > STARTED) throw new Error("too late; already running");
+	  return schedule;
 	}
-
-	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 get$4(node, id) {
+	  var schedule = node.__transition;
+	  if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
+	  return schedule;
 	}
 
-	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 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!
 
-	function quantize() {
-	  var x0 = 0,
-	      x1 = 1,
-	      n = 1,
-	      domain = [0.5],
-	      range = [0, 1],
-	      unknown;
+	  schedules[id] = self;
+	  self.timer = timer(schedule, 0, self.time);
 
-	  function scale(x) {
-	    return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
-	  }
+	  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.
 
-	  function rescale() {
-	    var i = -1;
-	    domain = new Array(n);
-	    while (++i < n) { domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1); }
-	    return scale;
+	    if (self.delay <= elapsed) start(elapsed - self.delay);
 	  }
 
-	  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)();
+	  function start(elapsed) {
+	    var i, j, n, o; // If the state is not SCHEDULED, then we previously errored on start.
 
-	        } else {
-	            context.ui().flash
-	                .duration(2000)
-	                .iconName('#iD-operation-' + _operation.id)
-	                .iconClass('operation')
-	                .text(_operation.annotation() || _operation.title)();
+	    if (self.state !== SCHEDULED) return stop();
 
-	            if (_operation.point) { _operation.point(null); }
-	            _operation();
-	        }
-	    }
+	    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!
 
+	      if (o.state === STARTED) return d3_timeout(start); // Interrupt the active transition, if any.
 
-	    function behavior() {
-	        if (_operation && _operation.available()) {
-	            context.keybinding()
-	                .on(_operation.keys, keypress);
+	      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];
 	        }
+	    } // 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.
 
-	        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) {
+	    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.
 
-	        var entity = context.entity(entityID);
+	    self.state = STARTING;
+	    self.on.call("start", node, node.__data__, self.index, self.group);
+	    if (self.state !== STARTING) return; // interrupted
 
-	        if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) { return null; }
+	    self.state = STARTED; // Initialize the tween, deleting null tween.
 
-	        if (!_extent) {
-	            _extent =  entity.extent(context.graph());
-	        } else {
-	            _extent = _extent.extend(entity.extent(context.graph()));
-	        }
+	    tween = new Array(n = self.tween.length);
 
-	        return actionCircularize(entityID, context.projection);
+	    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;
+	      }
 	    }
 
-	    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();
+	    tween.length = j + 1;
+	  }
 
-	    if (detected.os === 'mac') {
-	        return code;
-	    }
+	  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 (detected.os === 'win') {
-	        if (code === '⌘⇧Z') { return 'Ctrl+Y'; }
-	    }
+	    while (++i < n) {
+	      tween[i].call(node, t);
+	    } // Dispatch the end event.
 
-	    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];
-	        }
+	    if (self.state === ENDING) {
+	      self.on.call("end", node, node.__data__, self.index, self.group);
+	      stop();
 	    }
+	  }
 
-	    return result;
-	};
+	  function stop() {
+	    self.state = ENDED;
+	    self.timer.stop();
+	    delete schedules[id];
 
+	    for (var i in schedules) {
+	      return;
+	    } // eslint-disable-line no-unused-vars
 
-	// 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'),
-	    };
+	    delete node.__transition;
+	  }
+	}
 
-	    return replacements[code] || code;
-	};
+	function interrupt (node, name) {
+	  var schedules = node.__transition,
+	      schedule,
+	      active,
+	      empty = true,
+	      i;
+	  if (!schedules) return;
+	  name = name == null ? null : name + "";
 
-	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());
+	  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];
+	  }
 
-	    var operation = function() {
-	        var nextSelectedID;
-	        var nextSelectedLoc;
+	  if (empty) delete node.__transition;
+	}
 
-	        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;
-	                }
+	function selection_interrupt (name) {
+	  return this.each(function () {
+	    interrupt(this, name);
+	  });
+	}
 
-	                nextSelectedID = nodes[i];
-	                nextSelectedLoc = context.entity(nextSelectedID).loc;
-	            }
-	        }
+	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.
 
-	        context.perform(action, operation.annotation());
-	        context.validator().validate();
+	    if (tween !== tween0) {
+	      tween1 = tween0 = tween;
 
-	        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));
+	      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;
+	  };
+	}
 
-	    operation.available = function() {
-	        return true;
-	    };
+	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.
 
+	    if (tween !== tween0) {
+	      tween1 = (tween0 = tween).slice();
 
-	    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';
+	      for (var t = {
+	        name: name,
+	        value: value
+	      }, i = 0, n = tween1.length; i < n; ++i) {
+	        if (tween1[i].name === name) {
+	          tween1[i] = t;
+	          break;
 	        }
+	      }
 
-	        return false;
+	      if (i === n) tween1.push(t);
+	    }
 
+	    schedule.tween = tween1;
+	  };
+	}
 
-	        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 transition_tween (name, value) {
+	  var id = this._id;
+	  name += "";
 
-	        function hasWikidataTag(id) {
-	            var entity = context.entity(id);
-	            return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-	        }
+	  if (arguments.length < 2) {
+	    var tween = get$4(this.node(), id).tween;
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
+	    for (var i = 0, n = tween.length, t; i < n; ++i) {
+	      if ((t = tween[i]).name === name) {
+	        return t.value;
+	      }
+	    }
 
-	        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;
-	        }
-	    };
+	    return null;
+	  }
 
+	  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];
+	  };
+	}
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.delete.' + disable + '.' + multi) :
-	            _t('operations.delete.description' + '.' + multi);
-	    };
+	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 attrRemove$1(name) {
+	  return function () {
+	    this.removeAttribute(name);
+	  };
+	}
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) :
-	            _t('operations.delete.annotation.multiple', { n: selectedIDs.length });
-	    };
+	function attrRemoveNS$1(fullname) {
+	  return function () {
+	    this.removeAttributeNS(fullname.space, fullname.local);
+	  };
+	}
 
+	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);
+	  };
+	}
 
-	    operation.id = 'delete';
-	    operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-	    operation.title = _t('operations.delete.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	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);
+	  };
+	}
 
-	    return operation;
+	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 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 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 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 chooseAction(entityID) {
+	function attrInterpolate(name, i) {
+	  return function (t) {
+	    this.setAttribute(name, i.call(this, t));
+	  };
+	}
 
-	        var entity = context.entity(entityID);
-	        var geometry = entity.geometry(context.graph());
+	function attrInterpolateNS(fullname, i) {
+	  return function (t) {
+	    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
+	  };
+	}
 
-	        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);
-	                }
-	            }
-	        }
+	function attrTweenNS(fullname, value) {
+	  var t0, i0;
 
-	        return null;
-	    }
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && attrInterpolateNS(fullname, i);
+	    return t0;
+	  }
 
+	  tween._value = value;
+	  return tween;
+	}
 
-	    var operation = function() {
-	        if (!_actions.length) { return; }
+	function attrTween(name, value) {
+	  var t0, i0;
 
-	        var combinedAction = function(graph, t) {
-	            _actions.forEach(function(action) {
-	                if (!action.disabled(graph)) {
-	                    graph = action(graph, t);
-	                }
-	            });
-	            return graph;
-	        };
-	        combinedAction.transitionable = true;
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && attrInterpolate(name, i);
+	    return t0;
+	  }
 
-	        context.perform(combinedAction, operation.annotation());
+	  tween._value = value;
+	  return tween;
+	}
 
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
-	    };
+	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 delayFunction(id, value) {
+	  return function () {
+	    init(this, id).delay = +value.apply(this, arguments);
+	  };
+	}
 
-	    operation.available = function() {
-	        return _actions.length && selectedIDs.length === _actions.length;
-	    };
+	function delayConstant(id, value) {
+	  return value = +value, function () {
+	    init(this, id).delay = value;
+	  };
+	}
 
+	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;
+	}
 
-	    // don't cache this because the visible extent could change
-	    operation.disabled = function() {
-	        if (!_actions.length) { return ''; }
+	function durationFunction(id, value) {
+	  return function () {
+	    set$4(this, id).duration = +value.apply(this, arguments);
+	  };
+	}
 
-	        var actionDisableds = _actions.map(function(action) {
-	            return action.disabled(context.graph());
-	        }).filter(Boolean);
+	function durationConstant(id, value) {
+	  return value = +value, function () {
+	    set$4(this, id).duration = value;
+	  };
+	}
 
-	        if (actionDisableds.length === _actions.length) {
-	            // none of the features can be squared
+	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;
+	}
 
-	            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';
-	        }
+	function easeConstant(id, value) {
+	  if (typeof value !== "function") throw new Error();
+	  return function () {
+	    set$4(this, id).ease = value;
+	  };
+	}
 
-	        return false;
+	function transition_ease (value) {
+	  var id = this._id;
+	  return arguments.length ? this.each(easeConstant(id, value)) : get$4(this.node(), id).ease;
+	}
 
+	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;
+	  };
+	}
 
-	        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 transition_easeVarying (value) {
+	  if (typeof value !== "function") throw new Error();
+	  return this.each(easeVarying(this._id, value));
+	}
 
+	function transition_filter (match) {
+	  if (typeof match !== "function") match = matcher(match);
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.orthogonalize.' + disable + '.' + _amount) :
-	            _t('operations.orthogonalize.description.' + _type + '.' + _amount);
-	    };
+	  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);
+	}
 
-	    operation.annotation = function() {
-	        return _t('operations.orthogonalize.annotation.' + _type + '.' + _amount);
-	    };
+	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;
+	      }
+	    }
+	  }
 
-	    operation.id = 'orthogonalize';
-	    operation.keys = [_t('operations.orthogonalize.key')];
-	    operation.title = _t('operations.orthogonalize.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  for (; j < m0; ++j) {
+	    merges[j] = groups0[j];
+	  }
 
-	    return operation;
+	  return new Transition(merges, this._parents, this._name, this._id);
 	}
 
-	function operationReflectShort(context, selectedIDs) {
-	    return operationReflect(context, selectedIDs, 'short');
+	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";
+	  });
 	}
 
+	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.
 
-	function operationReflectLong(context, selectedIDs) {
-	    return operationReflect(context, selectedIDs, 'long');
+	    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
+	    schedule.on = on1;
+	  };
 	}
 
+	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));
+	}
 
-	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
-	    };
+	function removeFunction(id) {
+	  return function () {
+	    var parent = this.parentNode;
 
+	    for (var i in this.__transition) {
+	      if (+i !== id) return;
+	    }
 
-	    operation.available = function() {
-	        return nodes.length >= 3;
-	    };
+	    if (parent) parent.removeChild(this);
+	  };
+	}
 
+	function transition_remove () {
+	  return this.on("end.remove", removeFunction(this._id));
+	}
 
-	    // 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';
-	        }
+	function transition_select (select) {
+	  var name = this._name,
+	      id = this._id;
+	  if (typeof select !== "function") select = selector(select);
 
-	        return false;
+	  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);
+	}
 
-	        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 transition_selectAll (select) {
+	  var name = this._name,
+	      id = this._id;
+	  if (typeof select !== "function") select = selectorAll(select);
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
+	  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);
+	          }
 	        }
-	    };
 
+	        subgroups.push(children);
+	        parents.push(node);
+	      }
+	    }
+	  }
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.reflect.' + disable + '.' + multi) :
-	            _t('operations.reflect.description.' + axis + '.' + multi);
-	    };
+	  return new Transition(subgroups, parents, name, id);
+	}
 
+	var Selection$1 = selection.prototype.constructor;
+	function transition_selection () {
+	  return new Selection$1(this._groups, this._parents);
+	}
 
-	    operation.annotation = function() {
-	        return _t('operations.reflect.annotation.' + axis + '.' + multi);
-	    };
+	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);
+	  };
+	}
 
-	    operation.id = 'reflect-' + axis;
-	    operation.keys = [_t('operations.reflect.key.' + axis)];
-	    operation.title = _t('operations.reflect.title.' + axis);
-	    operation.behavior = behaviorOperation(context).which(operation);
+	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);
+	  };
+	}
 
-	    return operation;
+	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));
+	  };
 	}
 
-	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());
+	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.
 
+	    if (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);
+	    schedule.on = on1;
+	  };
+	}
 
-	    var operation = function() {
-	        context.enter(modeMove(context, selectedIDs));
-	    };
+	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 styleInterpolate(name, i, priority) {
+	  return function (t) {
+	    this.style.setProperty(name, i.call(this, t), priority);
+	  };
+	}
 
-	    operation.available = function() {
-	        return selectedIDs.length > 1 ||
-	            context.entity(selectedIDs[0]).type !== '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;
+	  }
 
-	    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';
-	        }
+	  tween._value = value;
+	  return tween;
+	}
 
-	        return false;
+	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));
+	}
 
+	function textConstant$1(value) {
+	  return function () {
+	    this.textContent = value;
+	  };
+	}
 
-	        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 textFunction$1(value) {
+	  return function () {
+	    var value1 = value(this);
+	    this.textContent = value1 == null ? "" : value1;
+	  };
+	}
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
-	    };
+	function transition_text (value) {
+	  return this.tween("text", typeof value === "function" ? textFunction$1(tweenValue(this, "text", value)) : textConstant$1(value == null ? "" : value + ""));
+	}
 
+	function textInterpolate(i) {
+	  return function (t) {
+	    this.textContent = i.call(this, t);
+	  };
+	}
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.move.' + disable + '.' + multi) :
-	            _t('operations.move.description.' + multi);
-	    };
+	function textTween(value) {
+	  var t0, i0;
 
+	  function tween() {
+	    var i = value.apply(this, arguments);
+	    if (i !== i0) t0 = (i0 = i) && textInterpolate(i);
+	    return t0;
+	  }
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) :
-	            _t('operations.move.annotation.multiple');
-	    };
+	  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));
+	}
 
-	    operation.id = 'move';
-	    operation.keys = [_t('operations.move.key')];
-	    operation.title = _t('operations.move.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	function transition_transition () {
+	  var name = this._name,
+	      id0 = this._id,
+	      id1 = newId();
 
-	    operation.mouseOnly = true;
+	  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
+	        });
+	      }
+	    }
+	  }
 
-	    return operation;
+	  return new Transition(groups, this._parents, name, id1);
 	}
 
-	function modeRotate(context, entityIDs) {
-	    var mode = {
-	        id: 'rotate',
-	        button: 'browse'
+	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.
 
-	    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;
-
+	      if (on !== on0) {
+	        on1 = (on0 = on).copy();
 
-	    function doRotate() {
-	        var fn;
-	        if (context.graph() !== _prevGraph) {
-	            fn = context.perform;
-	        } else {
-	            fn = context.replace;
-	        }
+	        on1._.cancel.push(cancel);
 
-	        // 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) {
+	        on1._.interrupt.push(cancel);
 
-	            var nodes = utilGetAllNodes(entityIDs, context.graph());
-	            var points = nodes.map(function(n) { return projection(n.loc); });
-	            _pivot = getPivot(points);
-	            _prevAngle = undefined;
-	        }
+	        on1._.end.push(end);
+	      }
 
+	      schedule.on = on1;
+	    }); // The selection was empty, resolve end immediately
 
-	        var currMouse = context.map().mouse();
-	        var currAngle = Math.atan2(currMouse[1] - _pivot[1], currMouse[0] - _pivot[0]);
+	    if (size === 0) resolve();
+	  });
+	}
 
-	        if (typeof _prevAngle === 'undefined') { _prevAngle = currAngle; }
-	        var delta = currAngle - _prevAngle;
+	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]);
 
-	        fn(actionRotate(entityIDs, _pivot, delta, projection));
+	var linear$1 = function linear(t) {
+	  return +t;
+	};
 
-	        _prevTransform = currTransform;
-	        _prevAngle = currAngle;
-	        _prevGraph = context.graph();
-	    }
+	function cubicInOut(t) {
+	  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
+	}
 
-	    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;
-	    }
+	var defaultTiming = {
+	  time: null,
+	  // Set on use.
+	  delay: 0,
+	  duration: 250,
+	  ease: cubicInOut
+	};
 
+	function inherit(node, id) {
+	  var timing;
 
-	    function finish() {
-	        event.stopPropagation();
-	        context.replace(actionNoop(), annotation);
-	        context.enter(modeSelect(context, entityIDs));
+	  while (!(timing = node.__transition) || !(timing = timing[id])) {
+	    if (!(node = node.parentNode)) {
+	      throw new Error("transition ".concat(id, " not found"));
 	    }
+	  }
 
+	  return timing;
+	}
 
-	    function cancel() {
-	        context.pop();
-	        context.enter(modeSelect(context, entityIDs));
-	    }
+	function selection_transition (name) {
+	  var id, timing;
 
+	  if (name instanceof Transition) {
+	    id = name._id, name = name._name;
+	  } else {
+	    id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
+	  }
 
-	    function undone() {
-	        context.enter(modeBrowse(context));
+	  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));
+	      }
 	    }
+	  }
 
+	  return new Transition(groups, this._parents, name, id);
+	}
 
-	    mode.enter = function() {
-	        context.features().forceVisible(entityIDs);
-
-	        behaviors.forEach(context.install);
+	selection.prototype.interrupt = selection_interrupt;
+	selection.prototype.transition = selection_transition;
 
-	        context.surface()
-	            .on('mousemove.rotate', doRotate)
-	            .on('click.rotate', finish);
+	var constant$3 = (function (x) {
+	  return function () {
+	    return x;
+	  };
+	});
 
-	        context.history()
-	            .on('undone.rotate', undone);
+	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
+	    }
+	  });
+	}
 
-	        keybinding
-	            .on('⎋', cancel)
-	            .on('↩', finish);
+	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);
 
-	        select(document)
-	            .call(keybinding);
-	    };
+	function nopropagation$1(event) {
+	  event.stopImmediatePropagation();
+	}
+	function noevent$1 (event) {
+	  event.preventDefault();
+	  event.stopImmediatePropagation();
+	}
 
+	// except for pinch-to-zoom, which is sent as a wheel+ctrlKey event
 
-	    mode.exit = function() {
-	        behaviors.forEach(context.uninstall);
+	function defaultFilter$1(event) {
+	  return (!event.ctrlKey || event.type === 'wheel') && !event.button;
+	}
 
-	        context.surface()
-	            .on('mousemove.rotate', null)
-	            .on('click.rotate', null);
+	function defaultExtent() {
+	  var e = this;
 
-	        context.history()
-	            .on('undone.rotate', null);
+	  if (e instanceof SVGElement) {
+	    e = e.ownerSVGElement || e;
 
-	        select(document)
-	            .call(keybinding.unbind);
+	    if (e.hasAttribute("viewBox")) {
+	      e = e.viewBox.baseVal;
+	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+	    }
 
-	        context.features().forceVisible([]);
-	    };
+	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+	  }
 
+	  return [[0, 0], [e.clientWidth, e.clientHeight]];
+	}
 
-	    mode.selectedIDs = function() {
-	        if (!arguments.length) { return entityIDs; }
-	        // no assign
-	        return mode;
-	    };
+	function defaultTransform() {
+	  return this.__zoom || identity$2;
+	}
 
+	function defaultWheelDelta(event) {
+	  return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * (event.ctrlKey ? 10 : 1);
+	}
 
-	    return mode;
+	function defaultTouchable$1() {
+	  return navigator.maxTouchPoints || "ontouchstart" in this;
 	}
 
-	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());
+	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,
+	      touchfirst,
+	      touchending,
+	      touchDelay = 500,
+	      wheelDelay = 150,
+	      clickDistance2 = 0,
+	      tapDistance = 10;
 
-	    var operation = function() {
-	        context.enter(modeRotate(context, selectedIDs));
-	    };
+	  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)");
+	  }
 
+	  zoom.transform = function (collection, transform, point, event) {
+	    var selection = collection.selection ? collection.selection() : collection;
+	    selection.property("__zoom", defaultTransform);
 
-	    operation.available = function() {
-	        return nodes.length >= 2;
-	    };
+	    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();
+	      });
+	    }
+	  };
 
+	  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);
+	  };
 
-	    operation.disabled = function() {
+	  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);
+	  };
 
-	        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';
-	        }
+	  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);
+	  };
 
-	        return false;
+	  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);
+	  };
 
+	  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 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 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);
+	  }
 
-	        function incompleteRelation(id) {
-	            var entity = context.entity(id);
-	            return entity.type === 'relation' && !entity.isComplete(context.graph());
-	        }
-	    };
+	  function centroid(extent) {
+	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+	  }
 
+	  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);
+	      };
+	    });
+	  }
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.rotate.' + disable + '.' + multi) :
-	            _t('operations.rotate.description.' + multi);
-	    };
+	  function gesture(that, args, clean) {
+	    return !clean && that.__zooming || new Gesture(that, args);
+	  }
 
+	  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;
+	  }
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) :
-	            _t('operations.rotate.annotation.multiple');
-	    };
+	  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");
+	      }
 
+	      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");
+	      }
 
-	    operation.id = 'rotate';
-	    operation.keys = [_t('operations.rotate.key')];
-	    operation.title = _t('operations.rotate.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	      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);
+	    }
+	  };
 
-	    operation.mouseOnly = true;
+	  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 operation;
-	}
+	    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.
 
-	function modeMove(context, entityIDs, baseGraph) {
-	    var mode = {
-	        id: 'move',
-	        button: 'browse'
-	    };
+	    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 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;
+	      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();
 	        }
 
-	        var currMouse = context.map().mouse();
-	        var origMouse = context.projection(_origin);
-	        var delta = geoVecSubtract(geoVecSubtract(currMouse, origMouse), nudge);
+	    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));
 
-	        fn(actionMove(entityIDs, delta, context.projection, _cache));
-	        _prevGraph = context.graph();
+	    function wheelidled() {
+	      g.wheel = null;
+	      g.end();
 	    }
+	  }
 
-
-	    function startNudge(nudge) {
-	        if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-	        _nudgeInterval = window.setInterval(function() {
-	            context.map().pan(nudge);
-	            doMove(nudge);
-	        }, 50);
+	  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 (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();
 
-	    function stopNudge() {
-	        if (_nudgeInterval) {
-	            window.clearInterval(_nudgeInterval);
-	            _nudgeInterval = null;
-	        }
-	    }
+	    function mousemoved(event) {
+	      noevent$1(event);
 
+	      if (!g.moved) {
+	        var dx = event.clientX - x0,
+	            dy = event.clientY - y0;
+	        g.moved = dx * dx + dy * dy > clickDistance2;
+	      }
 
-	    function move() {
-	        doMove();
-	        var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
-	        if (nudge) {
-	            startNudge(nudge);
-	        } else {
-	            stopNudge();
-	        }
+	      g.event(event).zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = pointer(event, currentTarget), g.mouse[1]), g.extent, translateExtent));
 	    }
 
-
-	    function finish() {
-	        event.stopPropagation();
-	        context.replace(actionNoop(), annotation);
-	        context.enter(modeSelect(context, entityIDs));
-	        stopNudge();
+	    function mouseupped(event) {
+	      v.on("mousemove.zoom mouseup.zoom", null);
+	      yesdrag(event.view, g.moved);
+	      noevent$1(event);
+	      g.event(event).end();
 	    }
+	  }
 
-
-	    function cancel() {
-	        if (baseGraph) {
-	            while (context.graph() !== baseGraph) { context.pop(); }
-	            context.enter(modeBrowse(context));
-	        } else {
-	            context.pop();
-	            context.enter(modeSelect(context, entityIDs));
-	        }
-	        stopNudge();
+	  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];
 	    }
 
+	    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);
+	  }
 
-	    function undone() {
-	        context.enter(modeBrowse(context));
+	  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];
 	    }
 
+	    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);
 
-	    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;
-	}
-
-	// 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; }
+	    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;
+	    }
 
-	        var oldIDs = context.copyIDs();
-	        if (!oldIDs.length) { return; }
+	    if (touchstarting) touchstarting = clearTimeout(touchstarting);
 
-	        var extent = geoExtent();
-	        var oldGraph = context.copyGraph();
-	        var newIDs = [];
+	    if (started) {
+	      if (g.taps < 2) touchfirst = p[0], touchstarting = setTimeout(function () {
+	        touchstarting = null;
+	      }, touchDelay);
+	      interrupt(this);
+	      g.start();
+	    }
+	  }
 
-	        var action = actionCopyEntities(oldIDs, oldGraph);
-	        context.perform(action);
+	  function touchmoved(event) {
+	    if (!this.__zooming) return;
 
-	        var copies = action.copies();
-	        var originals = new Set();
-	        Object.values(copies).forEach(function(entity) { originals.add(entity.id); });
+	    for (var _len5 = arguments.length, args = new Array(_len5 > 1 ? _len5 - 1 : 0), _key5 = 1; _key5 < _len5; _key5++) {
+	      args[_key5 - 1] = arguments[_key5];
+	    }
 
-	        for (var id in copies) {
-	            var oldEntity = oldGraph.entity(id);
-	            var newEntity = copies[id];
+	    var g = gesture(this, args).event(event),
+	        touches = event.changedTouches,
+	        n = touches.length,
+	        i,
+	        t,
+	        p,
+	        l;
+	    noevent$1(event);
 
-	            extent._extend(oldEntity.extent(oldGraph));
+	    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;
+	    }
 
-	            // 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);
-	            });
+	    t = g.that.__zoom;
 
-	            if (!parentCopied) {
-	                newIDs.push(newEntity.id);
-	            }
-	        }
+	    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;
 
-	        // Put pasted objects where mouse pointer is..
-	        var copyPoint = (context.copyLonLat() && projection(context.copyLonLat())) || projection(extent.center());
-	        var delta = geoVecSubtract(mouse, copyPoint);
+	    g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
+	  }
 
-	        context.perform(actionMove(newIDs, delta, projection));
-	        context.enter(modeMove(context, newIDs, baseGraph));
+	  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];
 	    }
 
+	    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);
 
-	    function behavior() {
-	        context.keybinding().on(uiCmd('⌘V'), doPaste);
-	        return behavior;
+	    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.
 
-	    behavior.off = function() {
-	        context.keybinding().off(uiCmd('⌘V'));
-	    };
-
+	      if (g.taps === 2) {
+	        t = pointer(t, this);
 
-	    return behavior;
-	}
+	        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);
+	        }
+	      }
+	    }
+	  }
 
-	/*
-	    `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
+	  zoom.wheelDelta = function (_) {
+	    return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$3(+_), zoom) : wheelDelta;
+	  };
 
-	    * 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.
-	 */
+	  zoom.filter = function (_) {
+	    return arguments.length ? (filter = typeof _ === "function" ? _ : constant$3(!!_), zoom) : filter;
+	  };
 
-	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);
-	            };
-	        };
+	  zoom.touchable = function (_) {
+	    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$3(!!_), zoom) : touchable;
+	  };
 
+	  zoom.extent = function (_) {
+	    return arguments.length ? (extent = typeof _ === "function" ? _ : constant$3([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+	  };
 
-	    function eventOf(thiz, argumentz) {
-	        return function(e1) {
-	            e1.target = behavior;
-	            customEvent(e1, dispatch$1.apply, dispatch$1, [e1.type, thiz, argumentz]);
-	        };
-	    }
+	  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 pointerdown() {
+	  zoom.constrain = function (_) {
+	    return arguments.length ? (constrain = _, zoom) : constrain;
+	  };
 
-	        if (_pointerId) { return; }
+	  zoom.duration = function (_) {
+	    return arguments.length ? (duration = +_, zoom) : duration;
+	  };
 
-	        _pointerId = event.pointerId || 'mouse';
+	  zoom.interpolate = function (_) {
+	    return arguments.length ? (interpolate = _, zoom) : interpolate;
+	  };
 
-	        _target = this;
-	        _event = eventOf(_target, arguments);
+	  zoom.on = function () {
+	    var value = listeners.on.apply(listeners, arguments);
+	    return value === listeners ? zoom : value;
+	  };
 
-	        // only force reflow once per drag
-	        var pointerLocGetter = utilFastMouse(_surface || _target.parentNode);
+	  zoom.clickDistance = function (_) {
+	    return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+	  };
 
-	        var offset;
-	        var startOrigin = pointerLocGetter(event);
-	        var started = false;
-	        var selectEnable = d3_event_userSelectSuppress();
+	  zoom.tapDistance = function (_) {
+	    return arguments.length ? (tapDistance = +_, zoom) : tapDistance;
+	  };
 
-	        select(window)
-	            .on(_pointerPrefix + 'move.drag', pointermove)
-	            .on(_pointerPrefix + 'up.drag pointercancel.drag', pointerup, true);
+	  return zoom;
+	}
 
-	        if (_origin) {
-	            offset = _origin.apply(_target, arguments);
-	            offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
-	        } else {
-	            offset = [0, 0];
-	        }
+	/*
+	    Bypasses features of D3's default projection stream pipeline that are unnecessary:
+	    * Antimeridian clipping
+	    * Spherical rotation
+	    * Resampling
+	*/
 
-	        event.stopPropagation();
+	function geoRawMercator() {
+	  var project = mercatorRaw;
+	  var k = 512 / Math.PI; // scale
 
+	  var x = 0;
+	  var y = 0; // translate
 
-	        function pointermove() {
-	            if (_pointerId !== (event.pointerId || 'mouse')) { return; }
+	  var clipExtent = [[0, 0], [0, 0]];
 
-	            var p = pointerLocGetter(event);
+	  function projection(point) {
+	    point = project(point[0] * Math.PI / 180, point[1] * Math.PI / 180);
+	    return [point[0] * k + x, y - point[1] * k];
+	  }
 
-	            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; }
+	  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];
+	  };
 
-	                started = true;
-	                _event({ type: 'start' });
+	  projection.scale = function (_) {
+	    if (!arguments.length) return k;
+	    k = +_;
+	    return projection;
+	  };
 
-	            // Don't send a `move` event in the same cycle as `start` since dragging
-	            // a midpoint will convert the target to a node.
-	            } else {
+	  projection.translate = function (_) {
+	    if (!arguments.length) return [x, y];
+	    x = +_[0];
+	    y = +_[1];
+	    return projection;
+	  };
 
-	                startOrigin = p;
-	                event.stopPropagation();
-	                event.preventDefault();
+	  projection.clipExtent = function (_) {
+	    if (!arguments.length) return clipExtent;
+	    clipExtent = _;
+	    return projection;
+	  };
 
-	                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]
-	                });
-	            }
-	        }
+	  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;
+	  };
 
+	  projection.stream = d3_geoTransform({
+	    point: function point(x, y) {
+	      var vec = projection([x, y]);
+	      this.stream.point(vec[0], vec[1]);
+	    }
+	  }).stream;
+	  return projection;
+	}
 
-	        function pointerup() {
-	            if (_pointerId !== (event.pointerId || 'mouse')) { return; }
+	function geoOrthoNormalizedDotProduct(a, b, origin) {
+	  if (geoVecEqual(origin, a) || geoVecEqual(origin, b)) {
+	    return 1; // coincident points, treat as straight and try to remove
+	  }
 
-	            _pointerId = null;
+	  return geoVecNormalizedDot(a, b, origin);
+	}
 
-	            if (started) {
-	                _event({ type: 'end' });
+	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
+	  }
+	}
 
-	                event.preventDefault();
-	            }
+	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);
 
-	            select(window)
-	                .on(_pointerPrefix + 'move.drag', null)
-	                .on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+	  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
 
-	            selectEnable();
-	        }
-	    }
+	    score = score + 2.0 * Math.min(Math.abs(dotp - 1.0), Math.min(Math.abs(dotp), Math.abs(dotp + 1)));
+	  }
 
+	  return score;
+	} // returns the maximum angle less than `lessThan` between the actual corner and a 0° or 90° corner
 
-	    function behavior(selection) {
-	        _pointerId = null;
-	        var matchesSelector = utilPrefixDOMProperty('matchesSelector');
-	        var delegate = pointerdown;
+	function geoOrthoMaxOffsetAngle(coords, isClosed, lessThan) {
+	  var max = -Infinity;
+	  var first = isClosed ? 0 : 1;
+	  var last = isClosed ? coords.length : coords.length - 1;
 
-	        if (_selector) {
-	            delegate = function() {
-	                var root = this;
-	                var target = event.target;
-	                for (; target && target !== root; target = target.parentNode) {
-	                    var datum = target.__data__;
+	  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;
+	  }
 
-	                    var entity = datum instanceof osmNote ? datum
-	                        : datum && datum.properties && datum.properties.entity;
+	  if (max === -Infinity) return null;
+	  return max;
+	} // similar to geoOrthoCalcScore, but returns quickly if there is something to do
 
-	                    if (entity && target[matchesSelector](_selector)) {
-	                        return pointerdown.call(target, entity);
-	                    }
-	                }
-	            };
-	        }
+	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);
 
-	        selection
-	            .on(_pointerPrefix + 'down.drag' + _selector, delegate);
-	    }
+	  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
 
+	    if (Math.abs(dotp) > 0) return 1; // something to do
 
-	    behavior.off = function(selection) {
-	        selection
-	            .on(_pointerPrefix + 'down.drag' + _selector, null);
-	    };
+	    score = 0; // already square
+	  }
 
+	  return score;
+	}
 
-	    behavior.selector = function(_) {
-	        if (!arguments.length) { return _selector; }
-	        _selector = _;
-	        return behavior;
-	    };
+	var onFreeze = internalMetadata.onFreeze;
 
+	var nativeFreeze = Object.freeze;
+	var FAILS_ON_PRIMITIVES$4 = fails(function () { nativeFreeze(1); });
 
-	    behavior.origin = function(_) {
-	        if (!arguments.length) { return _origin; }
-	        _origin = _;
-	        return behavior;
-	    };
+	// `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;
+	  }
+	});
 
+	// 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;
 
-	    behavior.cancel = function() {
-	        select(window)
-	            .on(_pointerPrefix + 'move.drag', null)
-	            .on(_pointerPrefix + 'up.drag pointercancel.drag', null);
-	        return behavior;
-	    };
+	  while (i--) {
+	    if (a[i] !== b[i]) return false;
+	  }
 
+	  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]
 
-	    behavior.target = function() {
-	        if (!arguments.length) { return _target; }
-	        _target = arguments[0];
-	        _event = eventOf(_target, Array.prototype.slice.call(arguments, 1));
-	        return behavior;
-	    };
+	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]
 
+	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]
 
-	    behavior.surface = function() {
-	        if (!arguments.length) { return _surface; }
-	        _surface = arguments[0];
-	        return behavior;
-	    };
+	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]];
 
-	    return utilRebind(behavior, dispatch$1, 'on');
-	}
+	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];
 
-	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 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'}]
+	//   }
 
-	    var _nudgeInterval;
-	    var _restoreSelectedIDs = [];
-	    var _wasMidpoint = false;
-	    var _isCancelled = false;
-	    var _activeEntity;
-	    var _startLoc;
-	    var _lastLoc;
+	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];
 
-	    function startNudge(entity, nudge) {
-	        if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-	        _nudgeInterval = window.setInterval(function() {
-	            context.map().pan(nudge);
-	            doMove(entity, nudge);
-	        }, 50);
+	    if (val && !seen.has(val)) {
+	      seen.add(val);
+	      acc.push(item);
 	    }
 
+	    return acc;
+	  }, []);
+	}
 
-	    function stopNudge() {
-	        if (_nudgeInterval) {
-	            window.clearInterval(_nudgeInterval);
-	            _nudgeInterval = null;
-	        }
+	// @@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 = {};
 
-	    function moveAnnotation(entity) {
-	        return _t('operations.move.annotation.' + entity.geometry(context.graph()));
-	    }
+	for (var i = 0; i < replacementList.length; i += 1) {
+	  var chars = replacementList[i].chars;
 
+	  for (var j$1 = 0; j$1 < chars.length; j$1 += 1) {
+	    diacriticsMap[chars[j$1]] = replacementList[i].base;
+	  }
+	}
 
-	    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 removeDiacritics(str) {
+	  return str.replace(/[^\u0000-\u007e]/g, function (c) {
+	    return diacriticsMap[c] || c;
+	  });
+	}
 
+	var replacementList_1 = replacementList;
+	var diacriticsMap_1 = diacriticsMap;
+	var diacritics = {
+	  remove: remove$1,
+	  replacementList: replacementList_1,
+	  diacriticsMap: diacriticsMap_1
+	};
 
-	    function shouldSnapToNode(target) {
-	        if (!_activeEntity) { return false; }
-	        return _activeEntity.geometry(context.graph()) !== 'vertex' ||
-	            (target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph()));
-	    }
+	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 origin(entity) {
-	        return context.projection(entity.loc);
+	  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);
 
-	    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);
-	        }
-	    }
-
+	    for (var i = 0; i < arabicBlocks.length; i++) {
+	      var block = arabicBlocks[i];
 
-	    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);
-	        }
+	      if (code >= block[0] && code <= block[1]) {
+	        return true;
+	      }
 	    }
 
+	    return false;
+	  }
 
-	    function start(entity) {
-	        _wasMidpoint = entity.type === 'midpoint';
-	        var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
-	        _isCancelled = !context.editable() || event.sourceEvent.shiftKey || hasHidden;
-
-
-	        if (_isCancelled) {
-	            if (hasHidden) {
-	                context.ui().flash
-	                    .duration(4000)
-	                    .text(_t('modes.drag_node.connected_to_hidden'))();
-	            }
-	            return drag.cancel();
-	        }
-
-	        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.target(vertex.node(), entity);
-
-	        } else {
-	            context.perform(actionNoop());
-	        }
-
-	        _activeEntity = entity;
-	        _startLoc = entity.loc;
-
-	        hover.ignoreVertex(entity.geometry(context.graph()) === 'vertex');
-
-	        context.surface().selectAll('.' + _activeEntity.id)
-	            .classed('active', true);
-
-	        context.enter(mode);
-	    }
-
+	  exports.isArabic = isArabic;
 
-	    // 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 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);
 
-	    function doMove(entity, 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 (!_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;
-
-	            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;
-	                }
-	            }
-	        }
+	    return code >= 0x660 && code <= 0x66C || code >= 0x6F0 && code <= 0x6F9;
+	  }
 
-	        context.replace(
-	            actionMoveNode(entity.id, loc)
-	        );
+	  exports.isMath = isMath;
+	});
 
-	        // Below here: validations
-	        var isInvalid = false;
+	var unicodeArabic = createCommonjsModule(function (module, exports) {
 
-	        // Check if this connection to `target` could cause relations to break..
-	        if (target) {
-	            isInvalid = hasRelationConflict(entity, target, edge, context.graph());
-	        }
+	  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;
+	});
 
-	        // Check if this drag causes the geometry to break..
-	        if (!isInvalid) {
-	            isInvalid = hasInvalidGeometry(entity, context.graph());
-	        }
+	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 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('')();
-	            }
-	        }
+	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 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);
-	        }
+	  var tashkeel = "\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8";
+	  exports.tashkeel = tashkeel;
 
-	        _lastLoc = loc;
+	  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;
 
-	    // 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;
-	        }
-
-	        // can we connect to it?
-	        var ids = [entity.id, target.id];
-	        return actionConnect(ids).disabled(testGraph);
+	  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
 
-	    function hasInvalidGeometry(entity, graph) {
-	        var parents = graph.parentWays(entity);
-	        var i, j, k;
-
-	        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; });
-	                }
-
-	                // test active ring for intersections with other rings in the multipolygon
-	                for (k = 0; k < rings.length; k++) {
-	                    if (k === activeIndex) { continue; }
-
-	                    // make sure active ring doesnt cross passive rings
-	                    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.
-	            if (activeIndex === null) {
-	                nodes = parent.nodes.map(function(nodeID) { return graph.entity(nodeID); });
-	                if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
-	                    return parent.geometry(graph);
-	                }
-	            }
-
-	        }
+	  addToLineBreakers(0x0621, 0x0625);
+	  addToLineBreakers(0x062F, 0x0632);
+	  addToLineBreakers(0x0660, 0x066D); // numerals, math
 
-	        return false;
-	    }
+	  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
 
-	    function move(entity) {
-	        if (_isCancelled) { return; }
-	        event.sourceEvent.stopPropagation();
+	  addToLineBreakers(0x10E60, 0x10E7F);
+	  addToLineBreakers(0x1EC70, 0x1ECBF);
+	  addToLineBreakers(0x1EE00, 0x1EEFF);
+	});
 
-	        context.surface().classed('nope-disabled', event.sourceEvent.altKey);
+	var GlyphSplitter_1 = createCommonjsModule(function (module, exports) {
 
-	        _lastLoc = context.projection.invert(event.point);
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
 
-	        doMove(entity);
-	        var nudge = geoViewportEdge(event.point, context.map().dimensions());
-	        if (nudge) {
-	            startNudge(entity, nudge);
+	  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 {
-	            stopNudge();
+	          letters.push(letter);
 	        }
-	    }
-
-	    function end(entity) {
-	        if (_isCancelled) { return; }
-
-	        var wasPoint = entity.geometry(context.graph()) === 'point';
-
-	        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
-
-	        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 {
+	        letters.push(letter);
+	      }
 
-	        } else if (target && target.type === 'node' && shouldSnapToNode(target)) {
-	            context.replace(
-	                actionConnect([target.id, entity.id]),
-	                connectAnnotation(entity, target)
-	            );
+	      if (reference.tashkeel.indexOf(letter) === -1) {
+	        lastLetter = letter;
+	      }
+	    });
+	    return letters;
+	  }
 
-	        } else if (_wasMidpoint) {
-	            context.replace(
-	                actionNoop(),
-	                _t('operations.add.annotation.vertex')
-	            );
+	  exports.GlyphSplitter = GlyphSplitter;
+	});
 
-	        } else {
-	            context.replace(
-	                actionNoop(),
-	                moveAnnotation(entity)
-	            );
-	        }
+	var BaselineSplitter_1 = createCommonjsModule(function (module, exports) {
 
-	        if (wasPoint) {
-	            context.enter(modeSelect(context, [entity.id]));
+	  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 {
-	            var reselection = _restoreSelectedIDs.filter(function(id) {
-	                return context.graph().hasEntity(id);
-	            });
-
-	            if (reselection.length) {
-	                context.enter(modeSelect(context, reselection));
-	            } else {
-	                context.enter(modeBrowse(context));
-	            }
-	        }
-	    }
-
-
-	    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;
-	    }
-
-
-	    function cancel() {
-	        drag.cancel();
-	        context.enter(modeBrowse(context));
-	    }
-
-
-	    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
-	        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;
-	}
-
-	function quickselect(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(arr, left, k);
-	        if (compare(arr[right], t) > 0) { swap(arr, left, right); }
-
-	        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 (j <= k) { left = j + 1; }
-	        if (k <= j) { right = j - 1; }
-	    }
-	}
-
-	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;
-	}
-
-	var RBush = function RBush(maxEntries) {
-	    if ( maxEntries === void 0 ) maxEntries = 9;
-
-	    // 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();
-	};
-
-	RBush.prototype.all = function all () {
-	    return this._all(this.data, []);
-	};
-
-	RBush.prototype.search = 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 (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();
-	    }
-
-	    return result;
-	};
-
-	RBush.prototype.collides = function collides (bbox) {
-	    var node = this.data;
-
-	    if (!intersects(bbox, node)) { return false; }
-
-	    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;
-
-	            if (intersects(bbox, childBBox)) {
-	                if (node.leaf || contains$1(bbox, childBBox)) { return true; }
-	                nodesToSearch.push(child);
-	            }
-	        }
-	        node = nodesToSearch.pop();
-	    }
-
-	    return false;
-	};
-
-	RBush.prototype.load = function load (data) {
-	    if (!(data && data.length)) { return this; }
-
-	    if (data.length < this._minEntries) {
-	        for (var i = 0; i < data.length; i++) {
-	            this.insert(data[i]);
+	          letters[letters.length - 1] += letter;
 	        }
-	        return this;
-	    }
+	      } else {
+	        letters.push(letter);
+	      }
 
-	    // 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 (reference.tashkeel.indexOf(letter) === -1) {
+	        // don't allow tashkeel to hide line break
+	        lastLetter = letter;
+	      }
+	    });
+	    return letters;
+	  }
 
-	    if (!this.data.children.length) {
-	        // save as is if tree is empty
-	        this.data = node;
+	  exports.BaselineSplitter = BaselineSplitter;
+	});
 
-	    } else if (this.data.height === node.height) {
-	        // split root if trees have the same height
-	        this._splitRoot(this.data, node);
+	var Normalization = createCommonjsModule(function (module, exports) {
 
-	    } else {
-	        if (this.data.height < node.height) {
-	            // swap trees if inserted one is bigger
-	            var tmpNode = this.data;
-	            this.data = node;
-	            node = tmpNode;
-	        }
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
 
-	        // insert the small tree into the large tree at appropriate level
-	        this._insert(node, this.data.height - node.height - 1, true);
+	  function Normal(word, breakPresentationForm) {
+	    // default is to turn initial/isolated/medial/final presentation form to generic
+	    if (typeof breakPresentationForm === 'undefined') {
+	      breakPresentationForm = true;
 	    }
 
-	    return this;
-	};
-
-	RBush.prototype.insert = function insert (item) {
-	    if (item) { this._insert(item, this.data.height - 1); }
-	    return this;
-	};
-
-	RBush.prototype.clear = function clear () {
-	    this.data = createNode([]);
-	    return this;
-	};
-
-	RBush.prototype.remove = 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;
+	    var returnable = '';
+	    word.split('').forEach(function (letter) {
+	      if (!isArabic_1.isArabic(letter)) {
+	        returnable += letter;
+	        return;
+	      }
 
-	    // depth-first iterative tree traversal
-	    while (node || path.length) {
+	      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);
 
-	        if (!node) { // go up
-	            node = path.pop();
-	            parent = path[path.length - 1];
-	            i = indexes.pop();
-	            goingUp = true;
-	        }
+	        for (var v = 0; v < versions.length; v++) {
+	          var localVersion = letterForms[versions[v]];
 
-	        if (node.leaf) { // check current node
-	            var index = findItem(item, node.children, equalsFn);
+	          if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	            // look at this embedded object
+	            var embeddedForms = Object.keys(localVersion);
 
-	            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;
-	            }
-	        }
+	            for (var ef = 0; ef < embeddedForms.length; ef++) {
+	              var form = localVersion[embeddedForms[ef]];
 
-	        if (!goingUp && !node.leaf && contains$1(node, bbox)) { // go down
-	            path.push(node);
-	            indexes.push(i);
-	            i = 0;
-	            parent = node;
-	            node = node.children[0];
+	              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'];
+	                    }
 
-	        } else if (parent) { // go right
-	            i++;
-	            node = parent.children[i];
-	            goingUp = false;
+	                    return;
+	                  } // console.log('keeping this letter');
 
-	        } else { node = null; } // nothing found
-	    }
 
-	    return this;
-	};
+	                  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');
 
-	RBush.prototype.toBBox = function toBBox (item) { return item; };
+	                  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'];
+	              }
 
-	RBush.prototype.compareMinX = function compareMinX (a, b) { return a.minX - b.minX; };
-	RBush.prototype.compareMinY = function compareMinY (a, b) { return a.minY - b.minY; };
+	              return;
+	            } // console.log('keeping this letter');
 
-	RBush.prototype.toJSON = function toJSON () { return this.data; };
 
-	RBush.prototype.fromJSON = function fromJSON (data) {
-	    this.data = data;
-	    return this;
-	};
+	            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');
 
-	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); }
+	            return;
+	          }
+	        }
+	      } // try ligatures
 
-	        node = nodesToSearch.pop();
-	    }
-	    return result;
-	};
 
-	RBush.prototype._build = function _build (items, left, right, height) {
+	      for (var v2 = 0; v2 < reference.ligatureList.length; v2++) {
+	        var normalForm = reference.ligatureList[v2];
 
-	    var N = right - left + 1;
-	    var M = this._maxEntries;
-	    var node;
+	        if (normalForm !== 'words') {
+	          var ligForms = Object.keys(unicodeLigatures["default"][normalForm]);
 
-	    if (N <= M) {
-	        // reached leaf level; return leaf
-	        node = createNode(items.slice(left, right + 1));
-	        calcBBox(node, this.toBBox);
-	        return node;
-	    }
+	          for (var f = 0; f < ligForms.length; f++) {
+	            if (unicodeLigatures["default"][normalForm][ligForms[f]] === letter) {
+	              returnable += normalForm;
+	              return;
+	            }
+	          }
+	        }
+	      } // try words ligatures
 
-	    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
-	        M = Math.ceil(N / Math.pow(M, height - 1));
-	    }
+	      for (var v3 = 0; v3 < reference.ligatureWordList.length; v3++) {
+	        var _normalForm = reference.ligatureWordList[v3];
 
-	    node = createNode([]);
-	    node.leaf = false;
-	    node.height = height;
+	        if (unicodeLigatures["default"].words[_normalForm] === letter) {
+	          returnable += _normalForm;
+	          return;
+	        }
+	      }
 
-	    // split the items into M mostly square tiles
+	      returnable += letter; // console.log('kept the letter')
+	    });
+	    return returnable;
+	  }
 
-	    var N2 = Math.ceil(N / M);
-	    var N1 = N2 * Math.ceil(Math.sqrt(M));
+	  exports.Normal = Normal;
+	});
 
-	    multiSelect(items, left, right, N1, this.compareMinX);
+	var CharShaper_1 = createCommonjsModule(function (module, exports) {
 
-	    for (var i = left; i <= right; i += N1) {
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
 
-	        var right2 = Math.min(i + N1 - 1, right);
+	  function CharShaper(letter, form) {
+	    if (!isArabic_1.isArabic(letter)) {
+	      // fail not Arabic
+	      throw new Error('Not Arabic');
+	    }
 
-	        multiSelect(items, i, right2, N2, this.compareMinY);
+	    if (letter === "\u0621") {
+	      // hamza alone
+	      return "\u0621";
+	    }
 
-	        for (var j = i; j <= right2; j += N2) {
+	    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 right3 = Math.min(j + N2 - 1, right2);
+	      for (var v = 0; v < versions.length; v++) {
+	        var localVersion = letterForms[versions[v]];
 
-	            // pack each entry recursively
-	            node.children.push(this._build(items, j, right3, height - 1));
+	        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];
+	              }
+	            }
+	          }
 	        }
+	      }
 	    }
+	  }
 
-	    calcBBox(node, this.toBBox);
+	  exports.CharShaper = CharShaper;
+	});
 
-	    return node;
-	};
+	var WordShaper_1 = createCommonjsModule(function (module, exports) {
 
-	RBush.prototype._chooseSubtree = function _chooseSubtree (bbox, node, level, path) {
-	    while (true) {
-	        path.push(node);
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
 
-	        if (node.leaf || path.length - 1 === level) { break; }
+	  function WordShaper(word) {
+	    var state = 'initial';
+	    var output = '';
 
-	        var minArea = Infinity;
-	        var minEnlargement = Infinity;
-	        var targetNode = (void 0);
+	    for (var w = 0; w < word.length; w++) {
+	      var nextLetter = ' ';
 
-	        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;
-	                }
-	            }
+	      for (var nxw = w + 1; nxw < word.length; nxw++) {
+	        if (!isArabic_1.isArabic(word[nxw])) {
+	          break;
 	        }
 
-	        node = targetNode || node.children[0];
+	        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 node;
-	};
+	    return output;
+	  }
 
-	RBush.prototype._insert = function _insert (item, level, isNode) {
-	    var bbox = isNode ? item : this.toBBox(item);
-	    var insertPath = [];
+	  exports.WordShaper = WordShaper;
+	});
 
-	    // find the best node for accommodating the item, saving all nodes along the path too
-	    var node = this._chooseSubtree(bbox, this.data, level, insertPath);
+	var ParentLetter_1 = createCommonjsModule(function (module, exports) {
 
-	    // put the item into the node
-	    node.children.push(item);
-	    extend$1(node, bbox);
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
 
-	    // 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; }
+	  function ParentLetter(letter) {
+	    if (!isArabic_1.isArabic(letter)) {
+	      throw new Error('Not an Arabic letter');
 	    }
 
-	    // adjust bboxes along the insertion path
-	    this._adjustParentBBoxes(bbox, insertPath, level);
-	};
-
-	// 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;
+	    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);
 
-	    this._chooseSplitAxis(node, m, M);
+	      for (var v = 0; v < versions.length; v++) {
+	        var localVersion = letterForms[versions[v]];
 
-	    var splitIndex = this._chooseSplitIndex(node, m, M);
+	        if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	          // look at this embedded object
+	          var embeddedForms = Object.keys(localVersion);
 
-	    var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
-	    newNode.height = node.height;
-	    newNode.leaf = node.leaf;
+	          for (var ef = 0; ef < embeddedForms.length; ef++) {
+	            var form = localVersion[embeddedForms[ef]];
 
-	    calcBBox(node, this.toBBox);
-	    calcBBox(newNode, this.toBBox);
+	            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;
+	        }
+	      }
 
-	    if (level) { insertPath[level - 1].children.push(newNode); }
-	    else { this._splitRoot(node, newNode); }
-	};
+	      return null;
+	    }
+	  }
 
-	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);
-	};
+	  exports.ParentLetter = ParentLetter;
 
-	RBush.prototype._chooseSplitIndex = function _chooseSplitIndex (node, m, M) {
-	    var index;
-	    var minOverlap = Infinity;
-	    var minArea = Infinity;
+	  function GrandparentLetter(letter) {
+	    if (!isArabic_1.isArabic(letter)) {
+	      throw new Error('Not an Arabic letter');
+	    }
 
-	    for (var i = m; i <= M - m; i++) {
-	        var bbox1 = distBBox(node, 0, i, this.toBBox);
-	        var bbox2 = distBBox(node, i, M, this.toBBox);
+	    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 overlap = intersectionArea(bbox1, bbox2);
-	        var area = bboxArea(bbox1) + bboxArea(bbox2);
+	      for (var v = 0; v < versions.length; v++) {
+	        var localVersion = letterForms[versions[v]];
 
-	        // choose distribution with minimum overlap
-	        if (overlap < minOverlap) {
-	            minOverlap = overlap;
-	            index = i;
+	        if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+	          // look at this embedded object
+	          var embeddedForms = Object.keys(localVersion);
 
-	            minArea = area < minArea ? area : minArea;
+	          for (var ef = 0; ef < embeddedForms.length; ef++) {
+	            var form = localVersion[embeddedForms[ef]];
 
-	        } else if (overlap === minOverlap) {
-	            // otherwise choose distribution with minimum area
-	            if (area < minArea) {
-	                minArea = area;
-	                index = i;
+	            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 index || M - m;
-	};
+	      return null;
+	    }
+	  }
 
-	// 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);
+	  exports.GrandparentLetter = GrandparentLetter;
+	});
 
-	    // 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 lib = createCommonjsModule(function (module, exports) {
 
-	// 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.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;
+	});
 
-	    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);
+	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
 
-	    for (var i = m; i < M - m; i++) {
-	        var child = node.children[i];
-	        extend$1(leftBBox, node.leaf ? toBBox(child) : child);
-	        margin += bboxMargin(leftBBox);
-	    }
+	  if (arabicRegex.test(inputText)) {
+	    inputText = lib.WordShaper(inputText);
+	  }
 
-	    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);
-	    }
+	  for (var n = 0; n < inputText.length; n++) {
+	    var c = inputText[n];
 
-	    return margin;
-	};
+	    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 = [];
+	      }
 
-	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);
+	      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 = [];
+	      }
 	    }
-	};
+	  }
 
-	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);
+	  ret += rtlBuffer.reverse().join('');
+	  return ret;
+	}
 
-	            } else { this.clear(); }
+	var propertyIsEnumerable = objectPropertyIsEnumerable.f;
 
-	        } else { calcBBox(path[i], this.toBBox); }
+	// `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;
+	  };
 	};
 
-	function findItem(item, items, equalsFn) {
-	    if (!equalsFn) { return items.indexOf(item); }
+	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)
+	};
 
-	    for (var i = 0; i < items.length; i++) {
-	        if (equalsFn(item, items[i])) { return i; }
-	    }
-	    return -1;
-	}
+	var $values = objectToArray.values;
 
-	// calculate node's bbox from bboxes of its children
-	function calcBBox(node, toBBox) {
-	    distBBox(node, 0, node.children.length, toBBox, node);
-	}
+	// `Object.values` method
+	// https://tc39.github.io/ecma262/#sec-object.values
+	_export({ target: 'Object', stat: true }, {
+	  values: function values(O) {
+	    return $values(O);
+	  }
+	});
 
-	// 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;
+	// https://github.com/openstreetmap/iD/issues/772
+	// http://mathiasbynens.be/notes/localstorage-pattern#comment-9
+	var _storage;
 
-	    for (var i = k; i < p; i++) {
-	        var child = node.children[i];
-	        extend$1(destNode, node.leaf ? toBBox(child) : child);
-	    }
+	try {
+	  _storage = localStorage;
+	} catch (e) {} // eslint-disable-line no-empty
 
-	    return destNode;
-	}
 
-	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;
-	}
+	_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.
+	//
 
-	function compareNodeMinX(a, b) { return a.minX - b.minX; }
-	function compareNodeMinY(a, b) { return a.minY - b.minY; }
 
-	function bboxArea(a)   { return (a.maxX - a.minX) * (a.maxY - a.minY); }
-	function bboxMargin(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }
+	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 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 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 responseText(response) {
+	  if (!response.ok) throw new Error(response.status + " " + response.statusText);
+	  return response.text();
+	}
 
-	    return Math.max(0, maxX - minX) *
-	           Math.max(0, maxY - minY);
+	function d3_text (input, init) {
+	  return fetch(input, init).then(responseText);
 	}
 
-	function contains$1(a, b) {
-	    return a.minX <= b.minX &&
-	           a.minY <= b.minY &&
-	           b.maxX <= a.maxX &&
-	           b.maxY <= a.maxY;
+	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 intersects(a, b) {
-	    return b.minX <= a.maxX &&
-	           b.minY <= a.maxY &&
-	           b.maxX >= a.minX &&
-	           b.maxY >= a.minY;
+	function d3_json (input, init) {
+	  return fetch(input, init).then(responseJson);
 	}
 
-	function createNode(children) {
-	    return {
-	        children: children,
-	        height: 1,
-	        leaf: true,
-	        minX: Infinity,
-	        minY: Infinity,
-	        maxX: -Infinity,
-	        maxY: -Infinity
-	    };
+	function parser(type) {
+	  return function (input, init) {
+	    return d3_text(input, init).then(function (text) {
+	      return new DOMParser().parseFromString(text, type);
+	    });
+	  };
 	}
 
-	// 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 d3_xml = parser("application/xml");
+	var svg = parser("image/svg+xml");
 
-	function multiSelect(arr, left, right, n, compare) {
-	    var stack = [left, right];
+	var _mainFileFetcher = coreFileFetcher(); // singleton
+	// coreFileFetcher asynchronously fetches data from JSON files
+	//
 
-	    while (stack.length) {
-	        right = stack.pop();
-	        left = stack.pop();
+	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
 
-	        if (right - left <= n) { continue; }
+	  _this.cache = function () {
+	    return _cachedData;
+	  }; // Returns a Promise to fetch data
+	  // (resolved with the data if we have it already)
 
-	        var mid = left + Math.ceil((right - left) / n / 2) * n;
-	        quickselect(arr, mid, left, right, compare);
 
-	        stack.push(left, mid, mid, right);
+	  _this.get = function (which) {
+	    if (_cachedData[which]) {
+	      return Promise.resolve(_cachedData[which]);
 	    }
-	}
 
-	var tiler = utilTiler();
-	var dispatch$1 = dispatch('loaded');
-	var _tileZoom = 14;
-	var _krUrlRoot = 'https://www.keepright.at';
-	var _krData = { errorTypes: {}, localizeStrings: {} };
+	    var file = _fileMap[which];
 
-	// This gets reassigned if reset
-	var _cache;
+	    var url = file && _this.asset(file);
 
-	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
-	];
+	    if (!url) {
+	      return Promise.reject("Unknown data file for \"".concat(which, "\""));
+	    }
+
+	    var prom = _inflight[url];
 
+	    if (!prom) {
+	      _inflight[url] = prom = d3_json(url).then(function (result) {
+	        delete _inflight[url];
 
-	function abortRequest(controller) {
-	  if (controller) {
-	    controller.abort();
-	  }
-	}
+	        if (!result) {
+	          throw new Error("No data loaded for \"".concat(which, "\""));
+	        }
 
-	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];
+	        _cachedData[which] = result;
+	        return result;
+	      })["catch"](function (err) {
+	        delete _inflight[url];
+	        throw err;
+	      });
 	    }
-	  });
-	}
-
 
-	function encodeIssueRtree(d) {
-	  return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-	}
+	    return prom;
+	  }; // Accessor for the file map
 
 
-	// Replace or remove QAItem from rtree
-	function updateRtree(item, replace) {
-	  _cache.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });
+	  _this.fileMap = function (val) {
+	    if (!arguments.length) return _fileMap;
+	    _fileMap = val;
+	    return _this;
+	  };
 
-	  if (replace) {
-	    _cache.rtree.insert(item);
-	  }
-	}
+	  var _assetPath = '';
 
+	  _this.assetPath = function (val) {
+	    if (!arguments.length) return _assetPath;
+	    _assetPath = val;
+	    return _this;
+	  };
 
-	function tokenReplacements(d) {
-	  if (!(d instanceof QAItem)) { return; }
+	  var _assetMap = {};
 
-	  var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
-	  var replacements = {};
+	  _this.assetMap = function (val) {
+	    if (!arguments.length) return _assetMap;
+	    _assetMap = val;
+	    return _this;
+	  };
 
-	  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;
-	  }
+	  _this.asset = function (val) {
+	    if (/^http(s)?:\/\//i.test(val)) return val;
+	    var filename = _assetPath + val;
+	    return _assetMap[filename] || filename;
+	  };
 
-	  // some descriptions are just fixed text
-	  if (!issueTemplate.regex) { return; }
+	  return _this;
+	}
 
-	  // 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 $findIndex$1 = arrayIteration.findIndex;
 
-	  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] : '';
-	    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]);
-	      }
-	    }
 
-	    replacements['var' + i] = capture;
-	  }
+	var FIND_INDEX = 'findIndex';
+	var SKIPS_HOLES$1 = true;
 
-	  return replacements;
-	}
+	var USES_TO_LENGTH$b = arrayMethodUsesToLength(FIND_INDEX);
 
+	// Shouldn't skip holes
+	if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES$1 = false; });
 
-	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]);
+	// `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);
 	  }
+	});
 
-	  switch (idType) {
-	    // link a string like "this node"
-	    case 'this':
-	      capture = linkErrorObject(capture);
-	      break;
+	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables(FIND_INDEX);
 
-	    case 'url':
-	      capture = linkURL(capture);
-	      break;
+	var $includes$1 = arrayIncludes.includes;
 
-	    // link an entity ID
-	    case 'n':
-	    case 'w':
-	    case 'r':
-	      capture = linkEntity(idType + capture);
-	      break;
 
-	    // 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;
+
+	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 capture;
+	// https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
+	addToUnscopables('includes');
 
+	var notARegexp = function (it) {
+	  if (isRegexp(it)) {
+	    throw TypeError("The method doesn't accept regular expressions");
+	  } return it;
+	};
 
-	  function linkErrorObject(d) {
-	    return ("<a class=\"error_object_link\">" + d + "</a>");
-	  }
+	var MATCH$2 = wellKnownSymbol('match');
 
-	  function linkEntity(d) {
-	    return ("<a class=\"error_entity_link\">" + d + "</a>");
-	  }
+	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;
+	};
 
-	  function linkURL(d) {
-	    return ("<a class=\"kr_external_link\" target=\"_blank\" href=\"" + d + "\">" + d + "</a>");
+	// `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);
 	  }
+	});
 
-	  // arbitrary node list of form: #ID, #ID, #ID...
-	  function parse211(capture) {
-	    var newList = [];
-	    var items = capture.split(', ');
+	var _detected;
 
-	    items.forEach(function (item) {
-	      // ID has # at the front
-	      var id = linkEntity('n' + item.slice(1));
-	      newList.push(id);
-	    });
+	function utilDetect(refresh) {
+	  if (_detected && !refresh) return _detected;
+	  _detected = {};
+	  var ua = navigator.userAgent;
+	  var m = null;
+	  /* Browser */
 
-	    return newList.join(', ');
+	  m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i); // Edge
+
+	  if (m !== null) {
+	    _detected.browser = m[1];
+	    _detected.version = m[2];
 	  }
 
-	  // 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('),');
+	  if (!_detected.browser) {
+	    m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i); // IE11
 
-	    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 (m !== null) {
+	      _detected.browser = 'msie';
+	      _detected.version = m[1];
+	    }
+	  }
 
-	    return newList.join(', ');
+	  if (!_detected.browser) {
+	    m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i); // Opera 15+
+
+	    if (m !== null) {
+	      _detected.browser = 'Opera';
+	      _detected.version = m[2];
+	    }
 	  }
 
-	  // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
-	  function parse294(capture) {
-	    var newList = [];
-	    var items = capture.split(',');
+	  if (!_detected.browser) {
+	    m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
 
-	    items.forEach(function (item) {
-	      // item of form "from/to node/relation #ID"
-	      item = item.split(' ');
+	    if (m !== null) {
+	      _detected.browser = m[1];
+	      _detected.version = m[2];
+	      m = ua.match(/version\/([\.\d]+)/i);
+	      if (m !== null) _detected.version = m[1];
+	    }
+	  }
 
-	      // to/from role is more clear in quotes
-	      var role = "\"" + (item[0]) + "\"";
+	  if (!_detected.browser) {
+	    _detected.browser = navigator.appName;
+	    _detected.version = navigator.appVersion;
+	  } // keep major.minor version only..
 
-	      // 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);
+	  _detected.version = _detected.version.split(/\W/).slice(0, 2).join('.'); // detect other browser capabilities
+	  // Legacy Opera has incomplete svg style support. See #715
 
-	      newList.push((role + " " + (item[1]) + " " + id));
-	    });
+	  _detected.opera = _detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15;
 
-	    return newList.join(', ');
+	  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;
 	  }
 
-	  // may or may not include the string "(including the name 'name')"
-	  function parse370(capture) {
-	    if (!capture) { return ''; }
+	  _detected.filedrop = window.FileReader && 'ondrop' in window;
+	  _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+	  _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+	  /* Platform */
 
-	    var match = capture.match(/\(including the name (\'.+\')\)/);
-	    if (match && match.length) {
-	      return _t('QA.keepRight.errorTypes.370.including_the_name', { name: match[1] });
-	    }
-	    return '';
+	  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';
 	  }
 
-	  // arbitrary node list of form: #ID,#ID,#ID...
-	  function parse20(capture) {
-	    var newList = [];
-	    var items = capture.split(',');
+	  _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.
 
-	    items.forEach(function (item) {
-	      // ID has # at the front
-	      var id = linkEntity('n' + item.slice(1));
-	      newList.push(id);
-	    });
+	  _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 */
 
-	    return newList.join(', ');
+	  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 serviceKeepRight = {
-	  title: 'keepRight',
+	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;
+	      }
+	      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
+	});
 
-	  init: function init() {
-	    _mainFileFetcher.get('keepRight')
-	      .then(function (d) { return _krData = d; });
+	var aesJs = createCommonjsModule(function (module, exports) {
+	  /*! MIT License. Copyright 2015-2018 Richard Moore <me@ricmoo.com>. See LICENSE.txt. */
+	  (function (root) {
 
-	    if (!_cache) {
-	      this.reset();
+	    function checkInt(value) {
+	      return parseInt(value) === value;
 	    }
 
-	    this.event = utilRebind(this, dispatch$1, 'on');
-	  },
+	    function checkInts(arrayish) {
+	      if (!checkInt(arrayish.length)) {
+	        return false;
+	      }
 
-	  reset: function reset() {
-	    if (_cache) {
-	      Object.values(_cache.inflightTile).forEach(abortRequest);
-	    }
+	      for (var i = 0; i < arrayish.length; i++) {
+	        if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
+	          return false;
+	        }
+	      }
 
-	    _cache = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush()
-	    };
-	  },
+	      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);
+	          }
+	        }
 
-	  // KeepRight API:  http://osm.mueschelsoft.de/keepright/interfacing.php
-	  loadIssues: function loadIssues(projection) {
-	    var this$1 = this;
+	        return arg;
+	      } // It's an array; check it is a valid representation of a byte
 
-	    var options = {
-	      format: 'geojson',
-	      ch: _krRuleset
-	    };
 
-	    // determine the needed tiles to cover the view
-	    var tiles = tiler
-	      .zoomExtent([_tileZoom, _tileZoom])
-	      .getTiles(projection);
+	      if (Array.isArray(arg)) {
+	        if (!checkInts(arg)) {
+	          throw new Error('Array contains invalid value: ' + arg);
+	        }
 
-	    // abort inflight requests that are no longer needed
-	    abortUnwantedRequests(_cache, tiles);
+	        return new Uint8Array(arg);
+	      } // Something else, but behaves like an array (maybe a Buffer? Arguments?)
 
-	    // 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;
+	      if (checkInt(arg.length) && checkInts(arg)) {
+	        return new Uint8Array(arg);
+	      }
 
-	      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');
-	          }
+	      throw new Error('unsupported array-like object');
+	    }
 
-	          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;
-	            }
+	    function createArray(length) {
+	      return new Uint8Array(length);
+	    }
 
-	            // 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
-	            });
+	    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);
+	        }
+	      }
 
-	            d.replacements = tokenReplacements(d);
+	      targetArray.set(sourceArray, targetStart);
+	    }
 
-	            _cache.data[id] = d;
-	            _cache.rtree.insert(encodeIssueRtree(d));
-	          });
+	    var convertUtf8 = function () {
+	      function toBytes(text) {
+	        var result = [],
+	            i = 0;
+	        text = encodeURI(text);
 
-	          dispatch$1.call('loaded');
-	        })
-	        .catch(function () {
-	          delete _cache.inflightTile[tile.id];
-	          _cache.loadedTile[tile.id] = true;
-	        });
+	        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);
+	      }
 
-	  postUpdate: function postUpdate(d, callback) {
-	    var this$1 = this;
+	      function fromBytes(bytes) {
+	        var result = [],
+	            i = 0;
 
-	    if (_cache.inflightPost[d.id]) {
-	      return callback({ message: 'Error update already inflight', status: -2 }, d);
-	    }
+	        while (i < bytes.length) {
+	          var c = bytes[i];
 
-	    var params = { schema: d.schema, id: d.id };
+	          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;
+	          }
+	        }
 
-	    if (d.newStatus) {
-	      params.st = d.newStatus;
-	    }
-	    if (d.newComment !== undefined) {
-	      params.co = d.newComment;
-	    }
+	        return result.join('');
+	      }
 
-	    // 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();
+	      return {
+	        toBytes: toBytes,
+	        fromBytes: fromBytes
+	      };
+	    }();
 
-	    _cache.inflightPost[d.id] = controller;
+	    var convertHex = function () {
+	      function toBytes(text) {
+	        var result = [];
 
-	    // 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
-	          }));
+	        for (var i = 0; i < text.length; i += 2) {
+	          result.push(parseInt(text.substr(i, 2), 16));
 	        }
 
-	        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 result;
+	      } // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
 
-	    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];
-	  },
+	      var Hex = '0123456789abcdef';
 
-	  // Replace a single QAItem in the cache
-	  replaceItem: function replaceItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	      function fromBytes(bytes) {
+	        var result = [];
 
-	    _cache.data[item.id] = item;
-	    updateRtree(encodeIssueRtree(item), true); // true = replace
-	    return item;
-	  },
+	        for (var i = 0; i < bytes.length; i++) {
+	          var v = bytes[i];
+	          result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
+	        }
 
-	  // Remove a single QAItem from the cache
-	  removeItem: function removeItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	        return result.join('');
+	      }
 
-	    delete _cache.data[item.id];
-	    updateRtree(encodeIssueRtree(item), false); // false = remove
-	  },
+	      return {
+	        toBytes: toBytes,
+	        fromBytes: fromBytes
+	      };
+	    }(); // Number of rounds by keysize
 
-	  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 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 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: {} };
+	    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
 
-	// This gets reassigned if reset
-	var _cache$1;
+	    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
 
-	function abortRequest$1(i) {
-	  Object.values(i).forEach(function (controller) {
-	    if (controller) {
-	      controller.abort();
-	    }
-	  });
-	}
+	    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 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];
-	    }
-	  });
-	}
+	    function convertToInt32(bytes) {
+	      var result = [];
 
-	function encodeIssueRtree$1(d) {
-	  return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-	}
+	      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]);
+	      }
 
-	// 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; });
+	      return result;
+	    }
 
-	  if (replace) {
-	    _cache$1.rtree.insert(item);
-	  }
-	}
+	    var AES = function AES(key) {
+	      if (!(this instanceof AES)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	function linkErrorObject(d) {
-	  return ("<a class=\"error_object_link\">" + d + "</a>");
-	}
+	      Object.defineProperty(this, 'key', {
+	        value: coerceArray(key, true)
+	      });
 
-	function linkEntity(d) {
-	  return ("<a class=\"error_entity_link\">" + d + "</a>");
-	}
+	      this._prepare();
+	    };
 
-	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];
-	  }
-	}
+	    AES.prototype._prepare = function () {
+	      var rounds = numberOfRounds[this.key.length];
 
-	function relativeBearing(p1, p2) {
-	  var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
-	  if (angle < 0) {
-	    angle += 2 * Math.PI;
-	  }
+	      if (rounds == null) {
+	        throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
+	      } // encryption round keys
 
-	  // Return degrees
-	  return angle * 180 / Math.PI;
-	}
 
-	// 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'
-	  };
+	      this._Ke = []; // decryption round keys
 
-	  return _t(("QA.improveOSM.directions." + (compass[dir])));
-	}
+	      this._Kd = [];
 
-	// 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 i = 0; i <= rounds; i++) {
+	        this._Ke.push([0, 0, 0, 0]);
 
-	  return loc;
-	}
+	        this._Kd.push([0, 0, 0, 0]);
+	      }
 
-	var serviceImproveOSM = {
-	  title: 'improveOSM',
+	      var roundKeyCount = (rounds + 1) * 4;
+	      var KC = this.key.length / 4; // convert the key into ints
 
-	  init: function init() {
-	    _mainFileFetcher.get('qa_data')
-	      .then(function (d) { return _impOsmData = d.improveOSM; });
+	      var tk = convertToInt32(this.key); // copy values into round key arrays
 
-	    if (!_cache$1) {
-	      this.reset();
-	    }
+	      var index;
 
-	    this.event = utilRebind(this, dispatch$2, 'on');
-	  },
+	      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)
 
-	  reset: function reset() {
-	    if (_cache$1) {
-	      Object.values(_cache$1.inflightTile).forEach(abortRequest$1);
-	    }
-	    _cache$1 = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush()
-	    };
-	  },
 
-	  loadIssues: function loadIssues(projection) {
-	    var this$1 = this;
+	      var rconpointer = 0;
+	      var t = KC,
+	          tt;
 
-	    var options = {
-	      client: 'iD',
-	      status: 'OPEN',
-	      zoom: '19' // Use a high zoom so that clusters aren't returned
-	    };
+	      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)
 
-	    // determine the needed tiles to cover the view
-	    var tiles = tiler$1
-	      .zoomExtent([_tileZoom$1, _tileZoom$1])
-	      .getTiles(projection);
+	        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)
 
-	    // abort inflight requests that are no longer needed
-	    abortUnwantedRequests$1(_cache$1, tiles);
+	        } else {
+	          for (var i = 1; i < KC / 2; i++) {
+	            tk[i] ^= tk[i - 1];
+	          }
 
-	    // issue new requests..
-	    tiles.forEach(function (tile) {
-	      if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) { return; }
+	          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;
 
-	      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 });
+	          for (var i = KC / 2 + 1; i < KC; i++) {
+	            tk[i] ^= tk[i - 1];
+	          }
+	        } // copy values into round key arrays
 
-	      // 3 separate requests to store for each tile
-	      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 = (_impOsmUrls[k]) + "/search?" + utilQsString(kParams);
-	        var controller = new AbortController();
+	        var i = 0,
+	            r,
+	            c;
 
-	        requests[k] = controller;
+	        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)
 
-	        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;
-	                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];
-	                }
+	      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];
+	        }
+	      }
+	    };
 
-	                // 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'
-	                });
+	    AES.prototype.encrypt = function (plaintext) {
+	      if (plaintext.length != 16) {
+	        throw new Error('invalid plaintext size (must be 16 bytes)');
+	      }
 
-	                // 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)
-	                };
+	      var rounds = this._Ke.length - 1;
+	      var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
 
-	                _cache$1.data[d.id] = d;
-	                _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	              });
-	            }
+	      var t = convertToInt32(plaintext);
 
-	            // 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 }
-	                });
+	      for (var i = 0; i < 4; i++) {
+	        t[i] ^= this._Ke[0][i];
+	      } // apply round transforms
 
-	                d.replacements = {
-	                  num_trips: numberOfTrips,
-	                  geometry_type: _t(("QA.improveOSM.geometry_types." + geoType))
-	                };
 
-	                // -1 trips indicates data came from a 3rd party
-	                if (numberOfTrips === -1) {
-	                  d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
-	                }
+	      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];
+	        }
 
-	                _cache$1.data[d.id] = d;
-	                _cache$1.rtree.insert(encodeIssueRtree$1(d));
-	              });
-	            }
+	        t = a.slice();
+	      } // the last round is special
 
-	            // 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'
-	                });
 
-	                // 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'))
-	                };
+	      var result = createArray(16),
+	          tt;
 
-	                _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;
-	            }
-	          });
-	      });
+	      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;
+	      }
 
-	      _cache$1.inflightTile[tile.id] = requests;
-	    });
-	  },
+	      return result;
+	    };
 
-	  getComments: function getComments(item) {
-	    var this$1 = this;
+	    AES.prototype.decrypt = function (ciphertext) {
+	      if (ciphertext.length != 16) {
+	        throw new Error('invalid ciphertext size (must be 16 bytes)');
+	      }
 
-	    // If comments already retrieved no need to do so again
-	    if (item.comments) {
-	      return Promise.resolve(item);
-	    }
+	      var rounds = this._Kd.length - 1;
+	      var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
 
-	    var key = item.issueKey;
-	    var qParams = {};
+	      var t = convertToInt32(ciphertext);
 
-	    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;
-	    }
+	      for (var i = 0; i < 4; i++) {
+	        t[i] ^= this._Kd[0][i];
+	      } // apply round transforms
 
-	    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; });
-	  },
+	      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];
+	        }
 
-	  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);
-	    }
+	        t = a.slice();
+	      } // the last round is special
 
-	    // Payload can only be sent once username is established
-	    serviceOsm.userDetails(sendPayload.bind(this));
 
-	    function sendPayload(err, user) {
-	      var this$1 = this;
+	      var result = createArray(16),
+	          tt;
 
-	      if (err) { return callback(err, d); }
+	      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;
+	      }
 
-	      var key = d.issueKey;
-	      var url = (_impOsmUrls[key]) + "/comment";
-	      var payload = {
-	        username: user.display_name,
-	        targetIds: [ d.identifier ]
-	      };
+	      return result;
+	    };
+	    /**
+	     *  Mode Of Operation - Electonic Codebook (ECB)
+	     */
 
-	      if (d.newStatus) {
-	        payload.status = d.newStatus;
-	        payload.text = 'status changed';
-	      }
 
-	      // Comment take place of default text
-	      if (d.newComment) {
-	        payload.text = d.newComment;
+	    var ModeOfOperationECB = function ModeOfOperationECB(key) {
+	      if (!(this instanceof ModeOfOperationECB)) {
+	        throw Error('AES must be instanitated with `new`');
 	      }
 
-	      var controller = new AbortController();
-	      _cache$1.inflightPost[d.id] = controller;
-
-	      var options = {
-	        method: 'POST',
-	        signal: controller.signal,
-	        body: JSON.stringify(payload)
-	      };
+	      this.description = "Electronic Code Block";
+	      this.name = "ecb";
+	      this._aes = new AES(key);
+	    };
 
-	      d3_json(url, options)
-	        .then(function () {
-	          delete _cache$1.inflightPost[d.id];
+	    ModeOfOperationECB.prototype.encrypt = function (plaintext) {
+	      plaintext = coerceArray(plaintext);
 
-	          // Just a comment, update error in cache
-	          if (!d.newStatus) {
-	            var now = new Date();
-	            var comments = d.comments ? d.comments : [];
+	      if (plaintext.length % 16 !== 0) {
+	        throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
+	      }
 
-	            comments.push({
-	              username: payload.username,
-	              text: payload.text,
-	              timestamp: now.getTime() / 1000
-	            });
+	      var ciphertext = createArray(plaintext.length);
+	      var block = createArray(16);
 
-	            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); }
-	        });
-	    }
-	  },
+	      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;
+	    };
 
-	  // 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();
+	    ModeOfOperationECB.prototype.decrypt = function (ciphertext) {
+	      ciphertext = coerceArray(ciphertext);
 
-	    return _cache$1.rtree.search(bbox).map(function (d) { return d.data; });
-	  },
+	      if (ciphertext.length % 16 !== 0) {
+	        throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
+	      }
 
-	  // 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];
-	  },
+	      var plaintext = createArray(ciphertext.length);
+	      var block = createArray(16);
 
-	  // get the name of the icon to display for this item
-	  getIcon: function getIcon(itemType) {
-	    return _impOsmData.icons[itemType];
-	  },
+	      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);
+	      }
 
-	  // Replace a single QAItem in the cache
-	  replaceItem: function replaceItem(issue) {
-	    if (!(issue instanceof QAItem) || !issue.id) { return; }
+	      return plaintext;
+	    };
+	    /**
+	     *  Mode Of Operation - Cipher Block Chaining (CBC)
+	     */
 
-	    _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; }
+	    var ModeOfOperationCBC = function ModeOfOperationCBC(key, iv) {
+	      if (!(this instanceof ModeOfOperationCBC)) {
+	        throw Error('AES must be instanitated with `new`');
+	      }
 
-	    delete _cache$1.data[issue.id];
-	    updateRtree$1(encodeIssueRtree$1(issue), false); // false = remove
-	  },
+	      this.description = "Cipher Block Chaining";
+	      this.name = "cbc";
 
-	  // Used to populate `closed:improveosm:*` changeset tags
-	  getClosedCounts: function getClosedCounts() {
-	    return _cache$1.closed;
-	  }
-	};
+	      if (!iv) {
+	        iv = createArray(16);
+	      } else if (iv.length != 16) {
+	        throw new Error('invalid initialation vector size (must be 16 bytes)');
+	      }
 
-	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._lastCipherblock = coerceArray(iv, true);
+	      this._aes = new AES(key);
+	    };
 
-	/**
-	 * 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);
-	    }
-	  }
+	    ModeOfOperationCBC.prototype.encrypt = function (plaintext) {
+	      plaintext = coerceArray(plaintext);
 
-	  return html;
-	}
+	      if (plaintext.length % 16 !== 0) {
+	        throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
+	      }
 
-	var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
+	      var ciphertext = createArray(plaintext.length);
+	      var block = createArray(16);
 
-	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 '';
-	  });
-	}
+	      for (var i = 0; i < plaintext.length; i += 16) {
+	        copyArray(plaintext, block, 0, i, i + 16);
 
-	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;
-	}
+	        for (var j = 0; j < 16; j++) {
+	          block[j] ^= this._lastCipherblock[j];
+	        }
 
-	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;
-	}
+	        this._lastCipherblock = this._aes.encrypt(block);
+	        copyArray(this._lastCipherblock, ciphertext, i);
+	      }
 
-	var baseUrls = {};
-	var justDomain = /^[^:]+:\/*[^/]*$/;
-	var protocol = /^([^:]+:)[\s\S]*$/;
-	var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
+	      return ciphertext;
+	    };
 
-	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;
+	    ModeOfOperationCBC.prototype.decrypt = function (ciphertext) {
+	      ciphertext = coerceArray(ciphertext);
 
-	  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;
-	  }
-	}
+	      if (ciphertext.length % 16 !== 0) {
+	        throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
+	      }
 
-	var noopTest = { exec: function noopTest() {} };
+	      var plaintext = createArray(ciphertext.length);
+	      var block = createArray(16);
 
-	function merge$1(obj) {
-	  var arguments$1 = arguments;
+	      for (var i = 0; i < ciphertext.length; i += 16) {
+	        copyArray(ciphertext, block, 0, i, i + 16);
+	        block = this._aes.decrypt(block);
 
-	  var i = 1,
-	    target,
-	    key;
+	        for (var j = 0; j < 16; j++) {
+	          plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
+	        }
 
-	  for (; i < arguments.length; i++) {
-	    target = arguments$1[i];
-	    for (key in target) {
-	      if (Object.prototype.hasOwnProperty.call(target, key)) {
-	        obj[key] = target[key];
+	        copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
 	      }
-	    }
-	  }
 
-	  return obj;
-	}
+	      return plaintext;
+	    };
+	    /**
+	     *  Mode Of Operation - Cipher Feedback (CFB)
+	     */
 
-	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 ' |';
+
+	    var ModeOfOperationCFB = function ModeOfOperationCFB(key, iv, segmentSize) {
+	      if (!(this instanceof ModeOfOperationCFB)) {
+	        throw Error('AES must be instanitated with `new`');
 	      }
-	    }),
-	    cells = row.split(/ \|/);
-	  var i = 0;
 
-	  if (cells.length > count) {
-	    cells.splice(count);
-	  } else {
-	    while (cells.length < count) { cells.push(''); }
-	  }
+	      this.description = "Cipher Feedback";
+	      this.name = "cfb";
 
-	  for (; i < cells.length; i++) {
-	    // leading or trailing whitespace is ignored per the gfm spec
-	    cells[i] = cells[i].trim().replace(/\\\|/g, '|');
-	  }
-	  return cells;
-	}
+	      if (!iv) {
+	        iv = createArray(16);
+	      } else if (iv.length != 16) {
+	        throw new Error('invalid initialation vector size (must be 16 size)');
+	      }
 
-	// 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 '';
-	  }
+	      if (!segmentSize) {
+	        segmentSize = 1;
+	      }
 
-	  // Length of suffix matching the invert condition.
-	  var suffLen = 0;
+	      this.segmentSize = segmentSize;
+	      this._shiftRegister = coerceArray(iv, true);
+	      this._aes = new AES(key);
+	    };
 
-	  // 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;
-	    }
-	  }
+	    ModeOfOperationCFB.prototype.encrypt = function (plaintext) {
+	      if (plaintext.length % this.segmentSize != 0) {
+	        throw new Error('invalid plaintext size (must be segmentSize bytes)');
+	      }
 
-	  return str.substr(0, l - suffLen);
-	}
+	      var encrypted = coerceArray(plaintext, true);
+	      var xorSegment;
 
-	function findClosingBracket(str, b) {
-	  if (str.indexOf(b[1]) === -1) {
-	    return -1;
-	  }
-	  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;
+	      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 -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');
-	  }
-	}
+	      return encrypted;
+	    };
 
-	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
-	};
+	    ModeOfOperationCFB.prototype.decrypt = function (ciphertext) {
+	      if (ciphertext.length % this.segmentSize != 0) {
+	        throw new Error('invalid ciphertext size (must be segmentSize bytes)');
+	      }
 
-	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;
+	      var plaintext = coerceArray(ciphertext, true);
+	      var xorSegment;
 
-	function outputLink(cap, link, raw) {
-	  var href = link.href;
-	  var title = link.title ? escape$2(link.title) : null;
+	      for (var i = 0; i < plaintext.length; i += this.segmentSize) {
+	        xorSegment = this._aes.encrypt(this._shiftRegister);
 
-	  if (cap[0].charAt(0) !== '!') {
-	    return {
-	      type: 'link',
-	      raw: raw,
-	      href: href,
-	      title: title,
-	      text: cap[1]
+	        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;
 	    };
-	  } else {
-	    return {
-	      type: 'image',
-	      raw: raw,
-	      text: escape$2(cap[1]),
-	      href: href,
-	      title: title
+	    /**
+	     *  Mode Of Operation - Output Feedback (OFB)
+	     */
+
+
+	    var ModeOfOperationOFB = function ModeOfOperationOFB(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);
 	    };
-	  }
-	}
 
-	/**
-	 * Tokenizer
-	 */
-	var Tokenizer_1 = /*@__PURE__*/(function () {
-	  function Tokenizer(options) {
-	    this.options = options || defaults$1;
-	  }
+	    ModeOfOperationOFB.prototype.encrypt = function (plaintext) {
+	      var encrypted = coerceArray(plaintext, true);
 
-	  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]
-	        };
+	      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 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
+
+
+	      if (initialValue !== 0 && !initialValue) {
+	        initialValue = 1;
 	      }
-	      return { raw: '\n' };
-	    }
-	  };
 
-	  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;
+	      if (typeof initialValue === 'number') {
+	        this._counter = createArray(16);
+	        this.setValue(initialValue);
 	      } 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
-	        };
+	        this.setBytes(initialValue);
 	      }
-	    }
-	  };
+	    };
 
-	  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] || ''
-	      };
-	    }
-	  };
+	    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
 
-	  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]
-	      };
-	    }
-	  };
 
-	  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 (value > Number.MAX_SAFE_INTEGER) {
+	        throw new Error('integer value out of safe range');
+	      }
 
-	      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;
-	          }
-	        }
+	      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;
+	    };
 
-	        l = item.cells.length;
-	        for (i = 0; i < l; i++) {
-	          item.cells[i] = splitCells$1(item.cells[i], item.header.length);
+	    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)
+	     */
 
-	        return item;
+
+	    var ModeOfOperationCTR = function ModeOfOperationCTR(key, counter) {
+	      if (!(this instanceof ModeOfOperationCTR)) {
+	        throw Error('AES must be instanitated with `new`');
 	      }
-	    }
-	  };
 
-	  Tokenizer.prototype.hr = function hr (src) {
-	    var cap = this.rules.block.hr.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'hr',
-	        raw: cap[0]
-	      };
-	    }
-	  };
+	      this.description = "Counter";
+	      this.name = "ctr";
 
-	  Tokenizer.prototype.blockquote = function blockquote (src) {
-	    var cap = this.rules.block.blockquote.exec(src);
-	    if (cap) {
-	      var text = cap[0].replace(/^ *> ?/gm, '');
+	      if (!(counter instanceof Counter)) {
+	        counter = new Counter(counter);
+	      }
 
-	      return {
-	        type: 'blockquote',
-	        raw: cap[0],
-	        text: text
-	      };
-	    }
-	  };
+	      this._counter = counter;
+	      this._remainingCounter = null;
+	      this._remainingCounterIndex = 16;
+	      this._aes = new AES(key);
+	    };
 
-	  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;
+	    ModeOfOperationCTR.prototype.encrypt = function (plaintext) {
+	      var encrypted = coerceArray(plaintext, true);
 
-	      var list = {
-	        type: 'list',
-	        raw: raw,
-	        ordered: isordered,
-	        start: isordered ? +bull : '',
-	        loose: false,
-	        items: []
-	      };
+	      for (var i = 0; i < encrypted.length; i++) {
+	        if (this._remainingCounterIndex === 16) {
+	          this._remainingCounter = this._aes.encrypt(this._counter._counter);
+	          this._remainingCounterIndex = 0;
 
-	      // 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;
-	          }
+	          this._counter.increment();
 	        }
 
-	        // 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; }
-	        }
+	        encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
+	      }
 
-	        if (loose) {
-	          list.loose = true;
-	        }
+	      return encrypted;
+	    }; // Decryption is symetric
 
-	        // 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
-	        });
+	    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 list;
+	      return result;
 	    }
-	  };
 
-	  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]
-	      };
-	    }
-	  };
+	    function pkcs7strip(data) {
+	      data = coerceArray(data, true);
 
-	  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]
-	      };
-	    }
-	  };
+	      if (data.length < 16) {
+	        throw new Error('PKCS#7 invalid length');
+	      }
 
-	  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') : []
-	      };
+	      var padder = data[data.length - 1];
 
-	      if (item.header.length === item.align.length) {
-	        item.raw = cap[0];
+	      if (padder > 16) {
+	        throw new Error('PKCS#7 padding byte out of range');
+	      }
 
-	        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 length = data.length - padder;
 
-	        l = item.cells.length;
-	        for (i = 0; i < l; i++) {
-	          item.cells[i] = splitCells$1(
-	            item.cells[i].replace(/^ *\| *| *\| *$/g, ''),
-	            item.header.length);
+	      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
+
 
-	        return item;
+	    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
 	    }
-	  };
+	  })();
+	});
 
-	  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]
-	      };
+	// 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);
 	    }
-	  };
+	  }
 
-	  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]
-	      };
+	  return out;
+
+	  function cleanValue(k, v) {
+	    function keepSpaces(k) {
+	      return /_hours|_times|:conditional$/.test(k);
 	    }
-	  };
 
-	  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]
-	      };
+	    function skip(k) {
+	      return /^(description|note|fixme)$/.test(k);
 	    }
-	  };
 
-	  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])
-	      };
+	    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
 	    }
-	  };
 
-	  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 cleaned;
+	  }
+	}
 
-	      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]
-	      };
+	// 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;
 	    }
-	  };
 
-	  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] = '';
+	    function valueConstant() {
+	      if (this.value !== value) {
+	        this.value = value;
 	      }
-	      var href = cap[2];
-	      var title = '';
-	      if (this.options.pedantic) {
-	        var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
+	    }
 
-	        if (link) {
-	          href = link[1];
-	          title = link[3];
-	        } else {
-	          title = '';
-	        }
-	      } else {
-	        title = cap[3] ? cap[3].slice(1, -1) : '';
+	    function valueFunction() {
+	      var x = value.apply(this, arguments);
+
+	      if (x === null || x === undefined) {
+	        delete this.value;
+	      } else if (this.value !== x) {
+	        this.value = x;
 	      }
-	      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 value === null || value === undefined ? 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(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
+
+	    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(d3_event, binding, true)) {
+	        binding.callback(d3_event);
+	        didMatch = true; // match a max of one binding per event
+
+	        break;
 	      }
-	      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]
-	      };
-	    }
-	  };
+	    if (didMatch) return; // then unshifted keybindings
 
-	  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]
-	      };
-	    }
-	  };
+	    for (i = 0; i < bindings.length; i++) {
+	      binding = bindings[i];
+	      if (binding.event.modifiers.shiftKey) continue; // shift
 
-	  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)
-	      };
-	    }
-	  };
+	      if (!!binding.capture !== isCapturing) continue;
 
-	  Tokenizer.prototype.br = function br (src) {
-	    var cap = this.rules.inline.br.exec(src);
-	    if (cap) {
-	      return {
-	        type: 'br',
-	        raw: cap[0]
-	      };
+	      if (matches(d3_event, binding, false)) {
+	        binding.callback(d3_event);
+	        break;
+	      }
 	    }
-	  };
 
-	  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]
-	      };
-	    }
-	  };
+	    function matches(d3_event, binding, testShift) {
+	      var event = d3_event;
+	      var isMatch = false;
+	      var tryKeyCode = true; // Prefer a match on `KeyboardEvent.key`
 
-	  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;
-	      }
+	      if (event.key !== undefined) {
+	        tryKeyCode = event.key.charCodeAt(0) > 255; // outside ISO-Latin-1
 
-	      return {
-	        type: 'link',
-	        raw: cap[0],
-	        text: text,
-	        href: href,
-	        tokens: [
-	          {
-	            type: 'text',
-	            raw: text,
-	            text: text
-	          }
-	        ]
-	      };
-	    }
-	  };
+	        isMatch = true;
 
-	  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;
+	        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 {
-	          href = text;
+	          if (event.key.toLowerCase() !== binding.event.key.toLowerCase()) isMatch = false;
 	        }
-	      }
-	      return {
-	        type: 'link',
-	        raw: cap[0],
-	        text: text,
-	        href: href,
-	        tokens: [
-	          {
-	            type: 'text',
-	            raw: text,
-	            text: text
-	          }
-	        ]
-	      };
-	    }
-	  };
+	      } // Fallback match on `KeyboardEvent.keyCode`, can happen if:
+	      // - browser doesn't support `KeyboardEvent.key`
+	      // - `KeyboardEvent.key` is outside ISO-Latin-1 range (cyrillic?)
 
-	  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]);
+
+	      if (!isMatch && tryKeyCode) {
+	        isMatch = event.keyCode === binding.event.keyCode;
 	      }
-	      return {
-	        type: 'text',
-	        raw: cap[0],
-	        text: text
-	      };
-	    }
-	  };
 
-	  return Tokenizer;
-	}());
+	      if (!isMatch) return false; // test modifier keys
 
-	var noopTest$1 = helpers.noopTest;
-	var edit$1 = helpers.edit;
-	var merge$2 = helpers.merge;
+	      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;
+	      }
 
-	/**
-	 * 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]+/
-	};
+	      if (event.metaKey !== binding.event.modifiers.metaKey) return false;
+	      if (testShift && event.shiftKey !== binding.event.modifiers.shiftKey) return false;
+	      return true;
+	    }
+	  }
 
-	block._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
-	block._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
-	block.def = edit$1(block.def)
-	  .replace('label', block._label)
-	  .replace('title', block._title)
-	  .getRegex();
+	  function capture(d3_event) {
+	    testBindings(d3_event, true);
+	  }
 
-	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();
+	  function bubble(d3_event) {
+	    var tagName = select(d3_event.target).node().tagName;
 
-	/**
-	 * Normal Block Grammar
-	 */
+	    if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
+	      return;
+	    }
 
-	block.normal = merge$2({}, block);
+	    testBindings(d3_event, false);
+	  }
 
-	/**
-	 * GFM Block Grammar
-	 */
+	  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()
 
-	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
-	});
 
-	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();
+	  keybinding.unbind = function (selection) {
+	    _keybindings = [];
+	    selection = selection || select(document);
+	    selection.on('keydown.capture.' + namespace, null);
+	    selection.on('keydown.bubble.' + namespace, null);
+	    return keybinding;
+	  };
 
-	/**
-	 * Pedantic grammar (original John Gruber's loose markdown specification)
-	 */
+	  keybinding.clear = function () {
+	    _keybindings = {};
+	    return keybinding;
+	  }; // Remove one or more keycode bindings.
 
-	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
-	 */
-	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))/
-	};
+	  keybinding.off = function (codes, capture) {
+	    var arr = utilArrayUniq([].concat(codes));
 
-	// 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 < arr.length; i++) {
+	      var id = arr[i] + (capture ? '-capture' : '-bubble');
+	      delete _keybindings[id];
+	    }
 
-	inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
+	    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
+	          }
+	        }
+	      };
 
-	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();
+	      if (_keybindings[id]) {
+	        console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
+	      }
 
-	inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
+	      _keybindings[id] = binding;
+	      var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);
 
-	inline.tag = edit$1(inline.tag)
-	  .replace('comment', block._comment)
-	  .replace('attribute', inline._attribute)
-	  .getRegex();
+	      for (var j = 0; j < matches.length; j++) {
+	        // Normalise matching errors
+	        if (matches[j] === '++') matches[j] = '+';
 
-	inline._label = /(?:\[[^\[\]]*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
-	inline._href = /<(?:\\[<>]?|[^\s<>\\])*>|[^\s\x00-\x1f]*/;
-	inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
+	        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];
 
-	inline.link = edit$1(inline.link)
-	  .replace('label', inline._label)
-	  .replace('href', inline._href)
-	  .replace('title', inline._title)
-	  .getRegex();
+	          if (matches[j] in utilKeybinding.keyCodes) {
+	            binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
+	          }
+	        }
+	      }
+	    }
 
-	inline.reflink = edit$1(inline.reflink)
-	  .replace('label', inline._label)
-	  .getRegex();
+	    return keybinding;
+	  };
 
-	/**
-	 * Normal Inline Grammar
+	  return keybinding;
+	}
+	/*
+	 * See https://github.com/keithamus/jwerty
 	 */
 
-	inline.normal = merge$2({}, inline);
+	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;
+	}
 
-	/**
-	 * Pedantic Inline Grammar
-	 */
+	function utilObjectOmit(obj, omitKeys) {
+	  return Object.keys(obj).reduce(function (result, key) {
+	    if (omitKeys.indexOf(key) === -1) {
+	      result[key] = obj[key]; // keep
+	    }
 
-	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()
-	});
+	    return result;
+	  }, {});
+	}
 
-	/**
-	 * GFM Inline Grammar
-	 */
+	// Copies a variable number of methods from source to target.
+	function utilRebind(target, source) {
+	  var i = 1,
+	      n = arguments.length,
+	      method;
+
+	  while (++i < n) {
+	    target[method = arguments[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.
 
-	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.!#$%&'*+\/=?_`{\|}~-]+@))|(?= {2,}\n|[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))/
-	});
+	function d3_rebind(target, source, method) {
+	  return function () {
+	    var value = method.apply(source, arguments);
+	    return value === source ? target : value;
+	  };
+	}
 
-	inline.gfm.url = edit$1(inline.gfm.url, 'i')
-	  .replace('email', inline.gfm._extended_email)
-	  .getRegex();
-	/**
-	 * GFM + Line Breaks Inline Grammar
-	 */
+	// 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;
 
-	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()
-	});
+	  function renew() {
+	    var expires = new Date();
+	    expires.setSeconds(expires.getSeconds() + 5);
+	    document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
+	  }
 
-	var rules = {
-	  block: block,
-	  inline: inline
-	};
+	  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;
+	  };
 
-	var defaults$2 = defaults.defaults;
-	var block$1 = rules.block;
-	var inline$1 = rules.inline;
+	  mutex.unlock = function () {
+	    if (!intervalID) return;
+	    document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
+	    clearInterval(intervalID);
+	    intervalID = null;
+	  };
 
-	/**
-	 * 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');
+	  mutex.locked = function () {
+	    return !!intervalID;
+	  };
+
+	  return mutex;
 	}
 
-	/**
-	 * mangle email addresses
-	 */
-	function mangle(text) {
-	  var out = '',
-	    i,
-	    ch;
+	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));
+	  }
 
-	  var l = text.length;
-	  for (i = 0; i < l; i++) {
-	    ch = text.charCodeAt(i);
-	    if (Math.random() > 0.5) {
-	      ch = 'x' + ch.toString(16);
+	  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;
 	    }
-	    out += '&#' + ch + ';';
+
+	    return false;
 	  }
 
-	  return out;
-	}
+	  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 = [];
 
-	/**
-	 * 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 < rows.length; i++) {
+	      var y = rows[i];
 
-	    var rules = {
-	      block: block$1.normal,
-	      inline: inline$1.normal
-	    };
+	      for (var j = 0; j < cols.length; j++) {
+	        var x = cols[j];
 
-	    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;
+	        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
+	        }
 	      }
 	    }
-	    this.tokenizer.rules = rules;
+
+	    tiles.translate = origin;
+	    tiles.scale = k;
+	    return tiles;
 	  }
+	  /**
+	   * getTiles() returns an array of tiles that cover the map view
+	   */
+
 
-	  var staticAccessors = { rules: { configurable: true } };
+	  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);
+	  };
 	  /**
-	   * Expose Rules
+	   * getGeoJSON() returns a FeatureCollection for debugging tiles
 	   */
-	  staticAccessors.rules.get = function () {
+
+
+	  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 {
-	      block: block$1,
-	      inline: inline$1
+	      type: 'FeatureCollection',
+	      features: features
 	    };
 	  };
 
-	  /**
-	   * Static Lex Method
-	   */
-	  Lexer.lex = function lex (src, options) {
-	    var lexer = new Lexer(options);
-	    return lexer.lex(src);
+	  tiler.tileSize = function (val) {
+	    if (!arguments.length) return _tileSize;
+	    _tileSize = val;
+	    return tiler;
 	  };
 
-	  /**
-	   * Preprocessing
-	   */
-	  Lexer.prototype.lex = function lex (src) {
-	    src = src
-	      .replace(/\r\n|\r/g, '\n')
-	      .replace(/\t/g, '    ');
+	  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;
+	  };
 
-	    this.blockTokens(src, this.tokens, true);
+	  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
 
-	    this.inline(this.tokens);
 
-	    return this.tokens;
+	  tiler.margin = function (val) {
+	    if (!arguments.length) return _margin;
+	    _margin = +val;
+	    return tiler;
 	  };
 
-	  /**
-	   * 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;
-	      }
+	  tiler.skipNullIsland = function (val) {
+	    if (!arguments.length) return _skipNullIsland;
+	    _skipNullIsland = val;
+	    return tiler;
+	  };
 
-	      // code
-	      if (token = this.tokenizer.code(src, tokens)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	  return tiler;
+	}
 
-	      // fences
-	      if (token = this.tokenizer.fences(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	function utilTriggerEvent(target, type) {
+	  target.each(function () {
+	    var evt = document.createEvent('HTMLEvents');
+	    evt.initEvent(type, true, true);
+	    this.dispatchEvent(evt);
+	  });
+	}
 
-	      // heading
-	      if (token = this.tokenizer.heading(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	var _mainLocalizer = coreLocalizer(); // singleton
 
-	      // table no leading pipe (gfm)
-	      if (token = this.tokenizer.nptable(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
 
-	      // hr
-	      if (token = this.tokenizer.hr(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	var _t = _mainLocalizer.t;
+	// coreLocalizer manages language and locale parameters including translated strings
+	//
 
-	      // blockquote
-	      if (token = this.tokenizer.blockquote(src)) {
-	        src = src.substring(token.raw.length);
-	        token.tokens = this.blockTokens(token.text, [], top);
-	        tokens.push(token);
-	        continue;
-	      }
+	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: {…} },
+	  // …
+	  // }
 
-	      // 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;
-	      }
+	  var _dataLocales = {}; // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
+	  // {
+	  // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+	  // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+	  // …
+	  // }
 
-	      // html
-	      if (token = this.tokenizer.html(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	  var _localeStrings = {}; // the current locale
 
-	      // 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;
-	      }
+	  var _localeCode = 'en-US'; // `_localeCodes` must contain `_localeCode` first, optionally followed by fallbacks
 
-	      // table (gfm)
-	      if (token = this.tokenizer.table(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	  var _localeCodes = ['en-US', 'en'];
+	  var _languageCode = 'en';
+	  var _textDirection = 'ltr';
+	  var _usesMetric = false;
+	  var _languageNames = {};
+	  var _scriptNames = {}; // getters for the current locale parameters
 
-	      // lheading
-	      if (token = this.tokenizer.lheading(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	  localizer.localeCode = function () {
+	    return _localeCode;
+	  };
 
-	      // top-level paragraph
-	      if (top && (token = this.tokenizer.paragraph(src))) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	  localizer.localeCodes = function () {
+	    return _localeCodes;
+	  };
 
-	      // text
-	      if (token = this.tokenizer.text(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	  localizer.languageCode = function () {
+	    return _languageCode;
+	  };
 
-	      if (src) {
-	        var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
-	        if (this.options.silent) {
-	          console.error(errMsg);
-	          break;
-	        } else {
-	          throw new Error(errMsg);
-	        }
-	      }
-	    }
+	  localizer.textDirection = function () {
+	    return _textDirection;
+	  };
+
+	  localizer.usesMetric = function () {
+	    return _usesMetric;
+	  };
 
-	    return tokens;
+	  localizer.languageNames = function () {
+	    return _languageNames;
 	  };
 
-	  Lexer.prototype.inline = function inline (tokens) {
-	    var i,
-	      j,
-	      k,
-	      l2,
-	      row,
-	      token;
+	  localizer.scriptNames = function () {
+	    return _scriptNames;
+	  }; // The client app may want to manually set the locale, regardless of the
+	  // settings provided by the browser
 
-	    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 _preferredLocaleCodes = [];
 
-	          // 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]);
-	            }
-	          }
+	  localizer.preferredLocaleCodes = function (codes) {
+	    if (!arguments.length) return _preferredLocaleCodes;
 
-	          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 (typeof codes === 'string') {
+	      // be generous and accept delimited strings as input
+	      _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
+	    } else {
+	      _preferredLocaleCodes = codes;
 	    }
 
-	    return tokens;
+	    return localizer;
 	  };
 
-	  /**
-	   * 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;
-	      }
+	  var _loadPromise;
 
-	      // 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;
-	      }
+	  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']);
 
-	      // 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;
-	      }
+	      _localeCodes = localesToUseFrom(requestedLocales); // Run iD in the highest-priority locale; the rest are fallbacks
 
-	      // 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);
-	        }
-	        tokens.push(token);
-	        continue;
-	      }
+	      _localeCode = _localeCodes[0]; // Will always return the index for `en` if nothing else
 
-	      // 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;
-	      }
+	      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
 
-	      // 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;
-	      }
 
-	      // code
-	      if (token = this.tokenizer.codespan(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      var loadStringsPromises = _localeCodes.slice(0, fullCoverageIndex + 1).map(function (code) {
+	        return localizer.loadLocale(code);
+	      });
 
-	      // br
-	      if (token = this.tokenizer.br(src)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	      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
 
-	      // 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;
-	      }
 
-	      // autolink
-	      if (token = this.tokenizer.autolink(src, mangle)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	  function localesToUseFrom(requestedLocales) {
+	    var supportedLocales = _dataLocales;
+	    var toUse = [];
 
-	      // url (gfm)
-	      if (!inLink && (token = this.tokenizer.url(src, mangle))) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
-	      }
+	    for (var i in requestedLocales) {
+	      var locale = requestedLocales[i];
+	      if (supportedLocales[locale]) toUse.push(locale);
 
-	      // text
-	      if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
-	        src = src.substring(token.raw.length);
-	        tokens.push(token);
-	        continue;
+	      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 (src) {
-	        var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
-	        if (this.options.silent) {
-	          console.error(errMsg);
-	          break;
-	        } else {
-	          throw new Error(errMsg);
-	        }
-	      }
+
+	    return utilArrayUniq(toUse);
+	  }
+
+	  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';
 	    }
 
-	    return tokens;
-	  };
+	    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
 
-	  Object.defineProperties( Lexer, staticAccessors );
 
-	  return Lexer;
-	}());
+	  localizer.loadLocale = function (requested) {
+	    if (!_dataLocales) {
+	      return Promise.reject('loadLocale called before init');
+	    }
 
-	var defaults$3 = defaults.defaults;
-	var cleanUrl$1 = helpers.cleanUrl;
-	var escape$3 = helpers.escape;
+	    var locale = requested; // US English is the default
 
-	/**
-	 * Renderer
-	 */
-	var Renderer_1 = /*@__PURE__*/(function () {
-	  function Renderer(options) {
-	    this.options = options || defaults$3;
-	  }
+	    if (locale.toLowerCase() === 'en-us') locale = 'en';
 
-	  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;
-	      }
+	    if (!_dataLocales[locale]) {
+	      return Promise.reject("Unsupported locale: ".concat(requested));
 	    }
 
-	    if (!lang) {
-	      return '<pre><code>'
-	        + (escaped ? code$1 : escape$3(code$1, true))
-	        + '</code></pre>';
+	    if (_localeStrings[locale]) {
+	      // already loaded
+	      return Promise.resolve(locale);
 	    }
 
-	    return '<pre><code class="'
-	      + this.options.langPrefix
-	      + escape$3(lang, true)
-	      + '">'
-	      + (escaped ? code$1 : escape$3(code$1, true))
-	      + '</code></pre>\n';
+	    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;
+	    });
 	  };
 
-	  Renderer.prototype.blockquote = function blockquote (quote) {
-	    return '<blockquote>\n' + quote + '</blockquote>\n';
-	  };
+	  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`
 
-	  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';
-	  };
+	  function pluralRule(number, localeCode) {
+	    // modern browsers have this functionality built-in
+	    var rules = 'Intl' in window && Intl.PluralRules && new Intl.PluralRules(localeCode);
 
-	  Renderer.prototype.hr = function hr () {
-	    return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
-	  };
+	    if (rules) {
+	      return rules.select(number);
+	    } // fallback to basic one/other, as in English
 
-	  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';
-	  };
 
-	  Renderer.prototype.listitem = function listitem (text) {
-	    return '<li>' + text + '</li>\n';
-	  };
+	    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
+	  */
 
-	  Renderer.prototype.checkbox = function checkbox (checked) {
-	    return '<input '
-	      + (checked ? 'checked="" ' : '')
-	      + 'disabled="" type="checkbox"'
-	      + (this.options.xhtml ? ' /' : '')
-	      + '> ';
-	  };
 
-	  Renderer.prototype.paragraph = function paragraph (text) {
-	    return '<p>' + text + '</p>\n';
-	  };
+	  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
 
-	  Renderer.prototype.table = function table (header, body) {
-	    if (body) { body = '<tbody>' + body + '</tbody>'; }
+	    if (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
+	    var result = _localeStrings[stringsKey];
 
-	    return '<table>\n'
-	      + '<thead>\n'
-	      + header
-	      + '</thead>\n'
-	      + body
-	      + '</table>\n';
-	  };
+	    while (result !== undefined && path.length) {
+	      result = result[path.pop()];
+	    }
 
-	  Renderer.prototype.tablerow = function tablerow (content) {
-	    return '<tr>\n' + content + '</tr>\n';
-	  };
+	    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';
+	          });
 
-	  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';
-	  };
+	          if (number !== undefined) {
+	            var rule = pluralRule(number, locale);
 
-	  // span level renderer
-	  Renderer.prototype.strong = function strong (text) {
-	    return '<strong>' + text + '</strong>';
-	  };
+	            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];
+	            }
+	          }
+	        }
 
-	  Renderer.prototype.em = function em (text) {
-	    return '<em>' + text + '</em>';
-	  };
+	        if (typeof result === 'string') {
+	          for (var key in replacements) {
+	            var value = replacements[key];
 
-	  Renderer.prototype.codespan = function codespan (text) {
-	    return '<code>' + text + '</code>';
-	  };
+	            if (typeof value === 'number' && value.toLocaleString) {
+	              // format numbers for the locale
+	              value = value.toLocaleString(locale, {
+	                style: 'decimal',
+	                useGrouping: true,
+	                minimumFractionDigits: 0
+	              });
+	            }
 
-	  Renderer.prototype.br = function br () {
-	    return this.options.xhtml ? '<br/>' : '<br>';
-	  };
+	            var token = "{".concat(key, "}");
+	            var regex = new RegExp(token, 'g');
+	            result = result.replace(regex, value);
+	          }
+	        }
+	      }
 
-	  Renderer.prototype.del = function del (text) {
-	    return '<del>' + text + '</del>';
-	  };
+	      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
 
-	  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;
-	  };
 
-	  Renderer.prototype.image = function image (href, title, text) {
-	    href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
-	    if (href === null) {
-	      return text;
+	    var index = _localeCodes.indexOf(locale);
+
+	    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);
 	    }
 
-	    var out = '<img src="' + href + '" alt="' + text + '"';
-	    if (title) {
-	      out += ' title="' + title + '"';
+	    if (replacements && 'default' in replacements) {
+	      // Fallback to a default value if one is specified in `replacements`
+	      return {
+	        text: replacements["default"],
+	        locale: null
+	      };
 	    }
-	    out += this.options.xhtml ? '/>' : '>';
-	    return out;
-	  };
 
-	  Renderer.prototype.text = function text (text$1) {
-	    return text$1;
-	  };
+	    var missing = "Missing ".concat(locale, " translation: ").concat(stringId);
+	    if (typeof console !== 'undefined') console.error(missing); // eslint-disable-line
 
-	  return Renderer;
-	}());
+	    return {
+	      text: missing,
+	      locale: 'en'
+	    };
+	  }; // Returns only the localized text, discarding the locale info
 
-	/**
-	 * TextRenderer
-	 * returns only the textual part of the token
-	 */
-	var TextRenderer_1 = /*@__PURE__*/(function () {
-	  function TextRenderer () {}
 
-	  TextRenderer.prototype.strong = function strong (text) {
-	    return text;
+	  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
+
+
+	  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) : '';
 	  };
 
-	  TextRenderer.prototype.em = function em (text) {
-	    return text;
+	  localizer.htmlForLocalizedText = function (text, localeCode) {
+	    return "<span class=\"localized-text\" lang=\"".concat(localeCode || 'unknown', "\">").concat(text, "</span>");
 	  };
 
-	  TextRenderer.prototype.codespan = function codespan (text) {
-	    return text;
+	  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
+
+
+	    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)"
+
+	          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
 	  };
 
-	  TextRenderer.prototype.del = function del (text) {
-	    return text;
+	  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;
 	  };
 
-	  TextRenderer.prototype.html = function html (text) {
-	    return text;
+	  _this.index = function (id) {
+	    return _this.collection.findIndex(function (d) {
+	      return d.id === id;
+	    });
 	  };
 
-	  TextRenderer.prototype.text = function text (text$1) {
-	    return text$1;
+	  _this.matchGeometry = function (geometry) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return d.matchGeometry(geometry);
+	    }));
 	  };
 
-	  TextRenderer.prototype.link = function link (href, title, text) {
-	    return '' + text;
+	  _this.matchAllGeometry = function (geometries) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return d && d.matchAllGeometry(geometries);
+	    }));
 	  };
 
-	  TextRenderer.prototype.image = function image (href, title, text) {
-	    return '' + text;
+	  _this.matchAnyGeometry = function (geometries) {
+	    return presetCollection(_this.collection.filter(function (d) {
+	      return geometries.some(function (geom) {
+	        return d.matchGeometry(geom);
+	      });
+	    }));
 	  };
 
-	  TextRenderer.prototype.br = function br () {
-	    return '';
+	  _this.fallback = function (geometry) {
+	    var id = geometry;
+	    if (id === 'vertex') id = 'point';
+	    return _this.item(id);
 	  };
 
-	  return TextRenderer;
-	}());
+	  _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")
 
-	/**
-	 * Slugger generates header id
-	 */
-	var Slugger_1 = /*@__PURE__*/(function () {
-	  function Slugger() {
-	    this.seen = {};
-	  }
+	    function leading(a) {
+	      var index = a.indexOf(value);
+	      return index === 0 || a[index - 1] === ' ';
+	    } // match at name beginning only
 
-	  /**
-	   * 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));
+
+	    function leadingStrict(a) {
+	      var index = a.indexOf(value);
+	      return index === 0;
 	    }
-	    this.seen[slug] = 0;
 
-	    return slug;
-	  };
+	    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 Slugger;
-	}());
+	      if (value === aCompare) return -1;
+	      if (value === bCompare) return 1; // priority for higher matchScore
 
-	var defaults$4 = defaults.defaults;
-	var unescape$2 = helpers.unescape;
+	      var i = b.originalScore - a.originalScore;
+	      if (i !== 0) return i; // priority if search string appears earlier in preset name
 
-	/**
-	 * 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();
-	  }
+	      i = aCompare.indexOf(value) - bCompare.indexOf(value);
+	      if (i !== 0) return i; // priority for shorter preset names
 
-	  /**
-	   * Static Parse Method
-	   */
-	  Parser.parse = function parse (tokens, options) {
-	    var parser = new Parser(options);
-	    return parser.parse(tokens);
-	  };
+	      return aCompare.length - bCompare.length;
+	    }
 
-	  /**
-	   * Parse Loop
-	   */
-	  Parser.prototype.parse = function parse (tokens, top) {
-	    if ( top === void 0 ) top = true;
+	    var pool = _this.collection;
 
-	    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;
-	        }
-	        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] }
-	              );
-	            }
+	    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;
+	      });
+	    }
 
-	            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;
-	              }
-	            }
+	    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
 
-	            itemBody += this.parse(item.tokens, loose);
-	            body += this.renderer.listitem(itemBody, task, checked);
-	          }
+	    var leading_name = searchable.filter(function (a) {
+	      return leading(a.name().toLowerCase());
+	    }).sort(sortNames); // matches value to preset suggestion name (original name is unhyphenated)
 
-	          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);
-	          }
-	        }
+	    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 out;
+	    return presetCollection(utilArrayUniq(results));
 	  };
 
-	  /**
-	   * Parse Inline Tokens
-	   */
-	  Parser.prototype.parseInline = function parseInline (tokens, renderer) {
-	    renderer = renderer || this.renderer;
-	    var out = '',
-	      i,
-	      token;
+	  return _this;
+	}
 
-	    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);
-	          }
-	        }
+	// `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 out;
+
+	    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.".concat(categoryID, ".name"), {
+	      'default': categoryID
+	    });
+	  };
+
+	  _this.nameLabel = function () {
+	    return _t.html("presets.categories.".concat(categoryID, ".name"), {
+	      'default': categoryID
+	    });
+	  };
+
+	  _this.terms = function () {
+	    return [];
 	  };
 
-	  return Parser;
-	}());
+	  return _this;
+	}
 
-	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;
+	// `presetField` decorates a given `field` Object
+	// with some extra methods for searching and matching geometry
+	//
 
-	/**
-	 * 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');
-	  }
+	function presetField(fieldID, field) {
+	  var _this = Object.assign({}, field); // shallow copy
 
-	  if (callback || typeof opt === 'function') {
-	    if (!callback) {
-	      callback = opt;
-	      opt = null;
-	    }
 
-	    opt = merge$3({}, marked.defaults, opt || {});
-	    checkSanitizeDeprecation$1(opt);
-	    var highlight = opt.highlight;
-	    var tokens,
-	      pending,
-	      i = 0;
+	  _this.id = fieldID; // for use in classes, element ids, css selectors
 
-	    try {
-	      tokens = Lexer_1.lex(src, opt);
-	    } catch (e) {
-	      return callback(e);
-	    }
+	  _this.safeid = utilSafeClassName(fieldID);
 
-	    pending = tokens.length;
+	  _this.matchGeometry = function (geom) {
+	    return !_this.geometry || _this.geometry.indexOf(geom) !== -1;
+	  };
 
-	    var done = function(err) {
-	      if (err) {
-	        opt.highlight = highlight;
-	        return callback(err);
-	      }
+	  _this.matchAllGeometry = function (geometries) {
+	    return !_this.geometry || geometries.every(function (geom) {
+	      return _this.geometry.indexOf(geom) !== -1;
+	    });
+	  };
 
-	      var out;
+	  _this.t = function (scope, options) {
+	    return _t("presets.fields.".concat(fieldID, ".").concat(scope), options);
+	  };
 
-	      try {
-	        out = Parser_1.parse(tokens, opt);
-	      } catch (e) {
-	        err = e;
-	      }
+	  _this.t.html = function (scope, options) {
+	    return _t.html("presets.fields.".concat(fieldID, ".").concat(scope), options);
+	  };
 
-	      opt.highlight = highlight;
+	  _this.title = function () {
+	    return _this.overrideLabel || _this.t('label', {
+	      'default': fieldID
+	    });
+	  };
 
-	      return err
-	        ? callback(err)
-	        : callback(null, out);
-	    };
+	  _this.label = function () {
+	    return _this.overrideLabel || _this.t.html('label', {
+	      'default': fieldID
+	    });
+	  };
 
-	    if (!highlight || highlight.length < 3) {
-	      return done();
-	    }
+	  var _placeholder = _this.placeholder;
 
-	    delete opt.highlight;
+	  _this.placeholder = function () {
+	    return _this.t('placeholder', {
+	      'default': _placeholder
+	    });
+	  };
 
-	    if (!pending) { return done(); }
+	  _this.originalTerms = (_this.terms || []).join();
 
-	    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]);
-	    }
+	  _this.terms = function () {
+	    return _this.t('terms', {
+	      'default': _this.originalTerms
+	    }).toLowerCase().trim().split(/\s*,+\s*/);
+	  };
 
-	    return;
-	  }
-	  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;
-	  }
+	  _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
+	  return _this;
 	}
 
-	/**
-	 * Options
-	 */
+	// `Array.prototype.lastIndexOf` method
+	// https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof
+	_export({ target: 'Array', proto: true, forced: arrayLastIndexOf !== [].lastIndexOf }, {
+	  lastIndexOf: arrayLastIndexOf
+	});
 
-	marked.options =
-	marked.setOptions = function(opt) {
-	  merge$3(marked.defaults, opt);
-	  changeDefaults(marked.defaults);
-	  return marked;
-	};
+	// `presetPreset` decorates a given `preset` Object
+	// with some extra methods for searching and matching geometry
+	//
 
-	marked.getDefaults = getDefaults;
+	function presetPreset(presetID, preset, addable, allFields, allPresets) {
+	  allFields = allFields || {};
+	  allPresets = allPresets || {};
 
-	marked.defaults = defaults$5;
+	  var _this = Object.assign({}, preset); // shallow copy
 
-	/**
-	 * Use Extension
-	 */
 
-	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;
-	      };
-	    };
+	  var _addable = addable || false;
 
-	    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;
-	      };
-	    };
+	  var _resolvedFields; // cache
 
-	    for (var prop$1 in extension.tokenizer) loop$1( prop );
-	    opts.tokenizer = tokenizer;
-	  }
-	  marked.setOptions(opts);
-	};
 
-	/**
-	 * Expose
-	 */
+	  var _resolvedMoreFields; // cache
 
-	marked.Parser = Parser_1;
-	marked.parser = Parser_1.parse;
 
-	marked.Renderer = Renderer_1;
-	marked.TextRenderer = TextRenderer_1;
+	  _this.id = presetID;
+	  _this.safeid = utilSafeClassName(presetID); // for use in css classes, selectors, element ids
 
-	marked.Lexer = Lexer_1;
-	marked.lexer = Lexer_1.lex;
+	  _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 || [];
 
-	marked.Tokenizer = Tokenizer_1;
+	  _this.fields = function () {
+	    return _resolvedFields || (_resolvedFields = resolve('fields'));
+	  };
 
-	marked.Slugger = Slugger_1;
+	  _this.moreFields = function () {
+	    return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
+	  };
 
-	marked.parse = marked;
+	  _this.resetFields = function () {
+	    return _resolvedFields = _resolvedMoreFields = null;
+	  };
 
-	var marked_1 = marked;
+	  _this.tags = _this.tags || {};
+	  _this.addTags = _this.addTags || _this.tags;
+	  _this.removeTags = _this.removeTags || _this.addTags;
+	  _this.geometry = _this.geometry || [];
 
-	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.matchGeometry = function (geom) {
+	    return _this.geometry.indexOf(geom) >= 0;
+	  };
 
-	// This gets reassigned if reset
-	var _cache$2;
+	  _this.matchAllGeometry = function (geoms) {
+	    return geoms.every(_this.matchGeometry);
+	  };
 
-	function abortRequest$2(controller) {
-	  if (controller) {
-	    controller.abort();
-	  }
-	}
+	  _this.matchScore = function (entityTags) {
+	    var tags = _this.tags;
+	    var seen = {};
+	    var score = 0; // match on tags
 
-	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];
-	    }
-	  });
-	}
+	    for (var k in tags) {
+	      seen[k] = true;
 
-	function encodeIssueRtree$2(d) {
-	  return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-	}
+	      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
 
-	// 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 (replace) {
-	    _cache$2.rtree.insert(item);
-	  }
-	}
+	    var addTags = _this.addTags;
 
-	// 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);
+	    for (var _k in addTags) {
+	      if (!seen[_k] && entityTags[_k] === addTags[_k]) {
+	        score += _this.originalScore;
+	      }
+	    }
 
-	  return loc;
-	}
+	    return score;
+	  };
 
-	var serviceOsmose = {
-	  title: 'osmose',
+	  _this.t = function (scope, options) {
+	    var textID = "presets.presets.".concat(presetID, ".").concat(scope);
+	    return _t(textID, options);
+	  };
 
-	  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]); }, []);
-	      });
+	  _this.t.html = function (scope, options) {
+	    var textID = "presets.presets.".concat(presetID, ".").concat(scope);
+	    return _t.html(textID, options);
+	  };
 
-	    if (!_cache$2) {
-	      this.reset();
-	    }
+	  _this.name = function () {
+	    return _this.t('name', {
+	      'default': _this.originalName
+	    });
+	  };
 
-	    this.event = utilRebind(this, dispatch$3, 'on');
-	  },
+	  _this.nameLabel = function () {
+	    return _this.t.html('name', {
+	      'default': _this.originalName
+	    });
+	  };
 
-	  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;
+	  _this.subtitle = function () {
+	    if (_this.suggestion) {
+	      var path = presetID.split('/');
+	      path.pop(); // remove brand name
+
+	      return _t('presets.presets.' + path.join('/') + '.name');
 	    }
-	    _cache$2 = {
-	      data: {},
-	      loadedTile: {},
-	      inflightTile: {},
-	      inflightPost: {},
-	      closed: {},
-	      rtree: new RBush(),
-	      strings: _strings,
-	      colors: _colors
-	    };
-	  },
 
-	  loadIssues: function loadIssues(projection) {
-	    var this$1 = this;
+	    return null;
+	  };
 
-	    var params = {
-	      // Tiles return a maximum # of issues
-	      // So we want to filter our request for only types iD supports
-	      item: _osmoseData.items
-	    };
+	  _this.subtitleLabel = function () {
+	    if (_this.suggestion) {
+	      var path = presetID.split('/');
+	      path.pop(); // remove brand name
 
-	    // determine the needed tiles to cover the view
-	    var tiles = tiler$2
-	      .zoomExtent([_tileZoom$2, _tileZoom$2])
-	      .getTiles(projection);
+	      return _t.html('presets.presets.' + path.join('/') + '.name');
+	    }
 
-	    // abort inflight requests that are no longer needed
-	    abortUnwantedRequests$2(_cache$2, tiles);
+	    return null;
+	  };
 
-	    // issue new requests..
-	    tiles.forEach(function (tile) {
-	      if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) { return; }
+	  _this.terms = function () {
+	    return _this.t('terms', {
+	      'default': _this.originalTerms
+	    }).toLowerCase().trim().split(/\s*,+\s*/);
+	  };
 
-	      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);
+	  _this.isFallback = function () {
+	    var tagCount = Object.keys(_this.tags).length;
+	    return tagCount === 0 || tagCount === 1 && _this.tags.hasOwnProperty('area');
+	  };
 
-	      var controller = new AbortController();
-	      _cache$2.inflightTile[tile.id] = controller;
+	  _this.addable = function (val) {
+	    if (!arguments.length) return _addable;
+	    _addable = val;
+	    return _this;
+	  };
 
-	      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 = [];
-	                }
+	  _this.reference = function () {
+	    // Lookup documentation on Wikidata...
+	    var qid = _this.tags.wikidata || _this.tags['brand:wikidata'] || _this.tags['operator:wikidata'];
 
-	                _cache$2.data[d.id] = d;
-	                _cache$2.rtree.insert(encodeIssueRtree$2(d));
-	              }
-	            });
-	          }
+	    if (qid) {
+	      return {
+	        qid: qid
+	      };
+	    } // Lookup documentation on OSM Wikibase...
 
-	          dispatch$3.call('loaded');
-	        })
-	        .catch(function () {
-	          delete _cache$2.inflightTile[tile.id];
-	          _cache$2.loadedTile[tile.id] = true;
-	        });
-	    });
-	  },
 
-	  loadIssueDetail: function loadIssueDetail(issue) {
-	    var this$1 = this;
+	    var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
+	    var value = _this.originalReference.value || _this.tags[key];
 
-	    // Issue details only need to be fetched once
-	    if (issue.elems !== undefined) {
-	      return Promise.resolve(issue);
+	    if (value === '*') {
+	      return {
+	        key: key
+	      };
+	    } else {
+	      return {
+	        key: key,
+	        value: value
+	      };
 	    }
+	  };
 
-	    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; });
+	  _this.unsetTags = function (tags, geometry, skipFieldDefaults) {
+	    tags = utilObjectOmit(tags, Object.keys(_this.removeTags));
 
-	      // Some issues have instance specific detail in a subtitle
-	      issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
+	    if (geometry && !skipFieldDefaults) {
+	      _this.fields().forEach(function (field) {
+	        if (field.matchGeometry(geometry) && field.key && field["default"] === tags[field.key]) {
+	          delete tags[field.key];
+	        }
+	      });
+	    }
 
-	      this$1.replaceItem(issue);
-	    };
+	    delete tags.area;
+	    return tags;
+	  };
 
-	    return d3_json(url).then(cacheDetails).then(function () { return issue; });
-	  },
+	  _this.setTags = function (tags, geometry, skipFieldDefaults) {
+	    var addTags = _this.addTags;
+	    tags = Object.assign({}, tags); // shallow copy
 
-	  loadStrings: function loadStrings(locale) {
-	    if ( locale === void 0 ) locale=_mainLocalizer.localeCode();
+	    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`)
 
-	    var items = Object.keys(_osmoseData.icons);
 
-	    if (
-	      locale in _cache$2.strings
-	      && Object.keys(_cache$2.strings[locale]).length === items.length
-	    ) {
-	        return Promise.resolve(_cache$2.strings[locale]);
-	    }
+	    if (!addTags.hasOwnProperty('area')) {
+	      delete tags.area;
 
-	    // May be partially populated already if some requests were successful
-	    if (!(locale in _cache$2.strings)) {
-	      _cache$2.strings[locale] = {};
-	    }
+	      if (geometry === 'area') {
+	        var needsAreaTag = 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; }
+	        if (_this.geometry.indexOf('line') === -1) {
+	          for (var _k2 in addTags) {
+	            if (_k2 in osmAreaKeys) {
+	              needsAreaTag = false;
+	              break;
+	            }
+	          }
+	        }
 
-	      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;
+	        if (needsAreaTag) {
+	          tags.area = 'yes';
 	        }
+	      }
+	    }
 
-	        // 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;
+	    if (geometry && !skipFieldDefaults) {
+	      _this.fields().forEach(function (field) {
+	        if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field["default"]) {
+	          tags[field.key] = field["default"];
 	        }
+	      });
+	    }
 
-	        // 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;
+	    return tags;
+	  }; // For a preset without fields, use the fields of the parent preset.
+	  // Replace {preset} placeholders with the fields of the specified presets.
 
-	        // 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); }
 
-	        _cache$2.strings[locale][itemType] = issueStrings;
-	      };
+	  function resolve(which) {
+	    var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
+	    var resolved = [];
+	    fieldIDs.forEach(function (fieldID) {
+	      var match = fieldID.match(/\{(.*)\}/);
 
-	      var ref = itemType.split('-');
-	      var item = ref[0];
-	      var cl = ref[1];
+	      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
 
-	      // Osmose API falls back to English strings where untranslated or if locale doesn't exist
-	      var url = _osmoseUrlRoot + "/items/" + item + "/class/" + cl + "?langs=" + locale;
+	    if (!resolved.length) {
+	      var endIndex = _this.id.lastIndexOf('/');
 
-	      return d3_json(url).then(cacheData);
-	    });
+	      var parentID = endIndex && _this.id.substring(0, endIndex);
 
-	    return Promise.all(allRequests).then(function () { return _cache$2.strings[locale]; });
-	  },
+	      if (parentID) {
+	        resolved = inheritFields(parentID, which);
+	      }
+	    }
 
-	  getStrings: function getStrings(itemType, locale) {
-	    if ( locale === void 0 ) locale=_mainLocalizer.localeCode();
+	    return utilArrayUniq(resolved); // returns an array of fields to inherit from the given presetID, if found
 
-	    // No need to fallback to English, Osmose API handles this for us
-	    return (locale in _cache$2.strings) ? _cache$2.strings[locale][itemType] : {};
-	  },
+	    function inheritFields(presetID, which) {
+	      var parent = allPresets[presetID];
+	      if (!parent) return [];
 
-	  getColor: function getColor(itemType) {
-	    return (itemType in _cache$2.colors) ? _cache$2.colors[itemType] : '#FFFFFF';
-	  },
+	      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=*`
 
-	  postUpdate: function postUpdate(issue, callback) {
-	    var this$1 = this;
 
-	    if (_cache$2.inflightPost[issue.id]) {
-	      return callback({ message: 'Issue update already inflight', status: -2 }, issue);
+	    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;
 	    }
+	  }
 
-	    // 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];
+	  return _this;
+	}
 
-	      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;
-	        }
-	        _cache$2.closed[issue.item] += 1;
-	      }
-	      if (callback) { callback(null, issue); }
-	    };
+	var _mainPresetIndex = presetIndex(); // singleton
+	// `presetIndex` wraps a `presetCollection`
+	// with methods for loading new data and returning defaults
+	//
 
-	    _cache$2.inflightPost[issue.id] = controller;
+	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;
 
-	    fetch(url, { signal: controller.signal })
-	      .then(after)
-	      .catch(function (err) {
-	        delete _cache$2.inflightPost[issue.id];
-	        if (callback) { callback(err.message); }
+	  _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]
 	      });
-	  },
 
-	  // 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();
+	      osmSetAreaKeys(_this.areaKeys());
+	      osmSetPointTags(_this.pointTags());
+	      osmSetVertexTags(_this.vertexTags());
+	    });
+	  };
 
-	    return _cache$2.rtree.search(bbox).map(function (d) { return d.data; });
-	  },
+	  _this.merge = function (d) {
+	    // Merge Fields
+	    if (d.fields) {
+	      Object.keys(d.fields).forEach(function (fieldID) {
+	        var f = d.fields[fieldID];
 
-	  // 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];
-	  },
+	        if (f) {
+	          // add or replace
+	          _fields[fieldID] = presetField(fieldID, f);
+	        } else {
+	          // remove
+	          delete _fields[fieldID];
+	        }
+	      });
+	    } // Merge Presets
 
-	  // 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; }
+	    if (d.presets) {
+	      Object.keys(d.presets).forEach(function (presetID) {
+	        var p = d.presets[presetID];
 
-	    _cache$2.data[item.id] = item;
-	    updateRtree$2(encodeIssueRtree$2(item), true); // true = replace
-	    return item;
-	  },
+	        if (p) {
+	          // add or replace
+	          var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
 
-	  // Remove a single QAItem from the cache
-	  removeItem: function removeItem(item) {
-	    if (!(item instanceof QAItem) || !item.id) { return; }
+	          _presets[presetID] = presetPreset(presetID, p, isAddable, _fields, _presets);
+	        } else {
+	          // remove (but not if it's a fallback)
+	          var existing = _presets[presetID];
 
-	    delete _cache$2.data[item.id];
-	    updateRtree$2(encodeIssueRtree$2(item), false); // false = remove
-	  },
+	          if (existing && !existing.isFallback()) {
+	            delete _presets[presetID];
+	          }
+	        }
+	      });
+	    } // Need to rebuild _this.collection before loading categories
 
-	  // 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/" + (item.id));
-	  }
-	};
+	    _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Categories
 
-	/*
-	    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) {
+	    if (d.categories) {
+	      Object.keys(d.categories).forEach(function (categoryID) {
+	        var c = d.categories[categoryID];
 
-	    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');
-	            });
+	        if (c) {
+	          // add or replace
+	          _categories[categoryID] = presetCategory(categoryID, c, _this);
+	        } else {
+	          // remove
+	          delete _categories[categoryID];
+	        }
+	      });
+	    } // Rebuild _this.collection after loading categories
 
-	        // 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; });
 
-	        // add symbol spritesheets
-	        defs
-	            .call(drawDefs.addSprites, [
-	                'iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'tnp-sprite', 'community-sprite'
-	            ], true);
-	    }
+	    _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
 
-	    drawDefs.addSprites = function(selection, ids, overrideColors) {
-	        var spritesheets = selection.selectAll('.spritesheet');
-	        var currData = spritesheets.data();
-	        var data = utilArrayUniq(currData.concat(ids));
+	    _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);
+	        }
+	      });
+	    });
 
-	        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 */
-	                    });
-	            });
-	    };
+	    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
 
-	    return drawDefs;
-	}
+	      if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
+	        geometry = 'point';
+	      }
 
-	/* global Mapillary:false */
+	      return _this.matchTags(entity.tags, geometry);
+	    });
+	  };
 
+	  _this.matchTags = function (tags, geometry) {
+	    var geometryMatches = _geometryIndex[geometry];
+	    var address;
+	    var best = -1;
+	    var match;
 
-	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;
+	    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;
 
-	function abortRequest$3(controller) {
-	    controller.abort();
-	}
+	      for (var i = 0; i < keyMatches.length; i++) {
+	        var score = keyMatches[i].matchScore(tags);
 
+	        if (score > best) {
+	          best = score;
+	          match = keyMatches[i];
+	        }
+	      }
+	    }
 
-	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; }
-	}
+	    if (address && (!match || match.isFallback())) {
+	      match = address;
+	    }
 
+	    return match || _this.fallback(geometry);
+	  };
 
-	function loadTiles(which, url, projection) {
-	    var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-	    var tiles = tiler$3.getTiles(projection);
+	  _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
 
-	    // 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];
-	        }
+	      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.
 
-	    tiles.forEach(function(tile) {
-	        loadNextTilePage(which, currZoom, url, tile);
-	    });
-	}
 
+	  _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
 
-	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(','),
-	        });
+	    var presets = _this.collection.filter(function (p) {
+	      return !p.suggestion && !p.replacement;
+	    }); // keeplist
 
-	    if (nextPage > maxPages) { return; }
 
-	    var id = tile.id + ',' + String(nextPage);
-	    if (cache.loaded[id] || cache.inflight[id]) { return; }
+	    presets.forEach(function (p) {
+	      var keys = p.tags && Object.keys(p.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	    var controller = new AbortController();
-	    cache.inflight[id] = controller;
+	      if (!key) return;
+	      if (ignore.indexOf(key) !== -1) return;
 
-	    var options = {
-	        method: 'GET',
-	        signal: controller.signal,
-	        headers: { 'Content-Type': 'application/json' }
-	    };
+	      if (p.geometry.indexOf('area') !== -1) {
+	        // probably an area..
+	        areaKeys[key] = areaKeys[key] || {};
+	      }
+	    }); // discardlist
 
-	    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');
-	            }
+	    presets.forEach(function (p) {
+	      var key;
 
-	            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
-	                    };
-	                }
+	      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];
 
-	                return {
-	                    minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-	                };
+	        if (key in areaKeys && // probably an area...
+	        p.geometry.indexOf('line') !== -1 && // but sometimes a line
+	        value !== '*') {
+	          areaKeys[key][value] = true;
+	        }
+	      }
+	    });
+	    return areaKeys;
+	  };
 
-	            }).filter(Boolean);
+	  _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
 
-	            if (cache.rtree && features) {
-	                cache.rtree.load(features);
-	            }
+	      var keys = d.tags && Object.keys(d.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
-	            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
-	            }
+	      if (!key) return pointTags; // if this can be a point
 
-	            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];
-	        });
-	}
+	      if (d.geometry.indexOf('point') !== -1) {
+	        pointTags[key] = pointTags[key] || {};
+	        pointTags[key][d.tags[key]] = true;
+	      }
 
-	// 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;
+	      return pointTags;
 	    }, {});
-	}
-
+	  };
 
-	// 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]);
+	  _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
 
-	    return tiler.getTiles(projection)
-	        .map(function(tile) { return tile.extent; });
-	}
+	      var keys = d.tags && Object.keys(d.tags);
+	      var key = keys && keys.length && keys[0]; // pick the first tag
 
+	      if (!key) return vertexTags; // if this can be a vertex
 
-	// no more than `limit` results per partition.
-	function searchLimited(limit, projection, rtree) {
-	    limit = limit || 5;
+	      if (d.geometry.indexOf('vertex') !== -1) {
+	        vertexTags[key] = vertexTags[key] || {};
+	        vertexTags[key][d.tags[key]] = true;
+	      }
 
-	    return partitionViewport(projection)
-	        .reduce(function(result, extent) {
-	            var found = rtree.search(extent.bbox())
-	                .slice(0, limit)
-	                .map(function(d) { return d.data; });
+	      return vertexTags;
+	    }, {});
+	  };
 
-	            return (found.length ? result.concat(found) : result);
-	        }, []);
-	}
+	  _this.field = function (id) {
+	    return _fields[id];
+	  };
 
+	  _this.universal = function () {
+	    return _universal;
+	  };
 
+	  _this.defaults = function (geometry, n, startWithRecents) {
+	    var recents = [];
 
-	var serviceMapillary = {
+	    if (startWithRecents) {
+	      recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
+	    }
 
-	    init: function() {
-	        if (!_mlyCache) {
-	            this.reset();
-	        }
+	    var defaults;
 
-	        this.event = utilRebind(this, dispatch$4, 'on');
-	    },
+	    if (_addablePresetIDs) {
+	      defaults = Array.from(_addablePresetIDs).map(function (id) {
+	        var preset = _this.item(id);
 
-	    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: {} }
-	        };
+	        if (preset && preset.matchGeometry(geometry)) return preset;
+	        return null;
+	      }).filter(Boolean);
+	    } else {
+	      defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
+	    }
 
-	        _mlySelectedImageKey = null;
-	        _mlyClicks = [];
-	    },
+	    return presetCollection(utilArrayUniq(recents.concat(defaults)).slice(0, n - 1));
+	  }; // pass a Set of addable preset ids
 
 
-	    images: function(projection) {
-	        var limit = 5;
-	        return searchLimited(limit, projection, _mlyCache.images.rtree);
-	    },
+	  _this.addablePresetIDs = function (val) {
+	    if (!arguments.length) return _addablePresetIDs; // accept and convert arrays
 
+	    if (Array.isArray(val)) val = new Set(val);
+	    _addablePresetIDs = val;
 
-	    signs: function(projection) {
-	        var limit = 5;
-	        return searchLimited(limit, projection, _mlyCache.map_features.rtree);
-	    },
+	    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;
+	  };
 
-	    mapFeatures: function(projection) {
-	        var limit = 5;
-	        return searchLimited(limit, projection, _mlyCache.points.rtree);
-	    },
+	  _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;
 
-	    cachedImage: function(imageKey) {
-	        return _mlyCache.images.forImageKey[imageKey];
-	    },
+	    item.isFavorite = function () {
+	      return item.source === 'favorite';
+	    };
 
+	    item.isRecent = function () {
+	      return item.source === 'recent';
+	    };
 
-	    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 = {};
+	    item.matches = function (preset) {
+	      return item.preset.id === preset.id;
+	    };
 
-	        // 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;
-	                }
-	            });
+	    item.minified = function () {
+	      return {
+	        pID: item.preset.id
+	      };
+	    };
 
-	        // Return lineStrings for the sequences
-	        return Object.keys(sequenceKeys).map(function(sequenceKey) {
-	            return _mlyCache.sequences.lineString[sequenceKey];
-	        });
-	    },
+	    return item;
+	  }
 
+	  function ribbonItemForMinified(d, source) {
+	    if (d && d.pID) {
+	      var preset = _this.item(d.pID);
 
-	    signsSupported: function() {
-	        return true;
-	    },
+	      if (!preset) return null;
+	      return RibbonItem(preset, source);
+	    }
 
+	    return null;
+	  }
 
-	    loadImages: function(projection) {
-	        loadTiles('images', apibase + 'images?sort_by=key&', projection);
-	        loadTiles('sequences', apibase + 'sequences?sort_by=key&', projection);
-	    },
+	  _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);
 
-	    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);
-	    },
+	      if (preset) return RibbonItem(preset, 'addable');
+	      return null;
+	    }).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');
+	  }
 
-	    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);
-	    },
+	  _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;
+	  };
 
-	    loadViewer: function(context) {
-	        // add mly-wrapper
-	        var wrap = context.container().select('.photoviewer')
-	            .selectAll('.mly-wrapper')
-	            .data([0]);
+	  _this.addRecent = function (preset, besidePreset, after) {
+	    var recents = _this.getRecents();
 
-	        wrap.enter()
-	            .append('div')
-	            .attr('id', 'ideditor-mly')
-	            .attr('class', 'photo-wrapper mly-wrapper')
-	            .classed('hide', true);
+	    var beforeItem = _this.recentMatching(besidePreset);
 
-	        // 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));
+	    var toIndex = recents.indexOf(beforeItem);
+	    if (after) toIndex += 1;
+	    var newItem = RibbonItem(preset, 'recent');
+	    recents.splice(toIndex, 0, newItem);
+	    setRecents(recents);
+	  };
 
-	        // 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();
-	            }
-	        });
-	    },
+	  _this.removeRecent = function (preset) {
+	    var item = _this.recentMatching(preset);
 
+	    if (item) {
+	      var items = _this.getRecents();
 
-	    showViewer: function(context) {
-	        var wrap = context.container().select('.photoviewer')
-	            .classed('hide', false);
+	      items.splice(items.indexOf(item), 1);
+	      setRecents(items);
+	    }
+	  };
 
-	        var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();
+	  _this.recentMatching = function (preset) {
+	    var items = _this.getRecents();
 
-	        if (isHidden && _mlyViewer) {
-	            wrap
-	                .selectAll('.photo-wrapper:not(.mly-wrapper)')
-	                .classed('hide', true);
+	    for (var i in items) {
+	      if (items[i].matches(preset)) {
+	        return items[i];
+	      }
+	    }
 
-	            wrap
-	                .selectAll('.photo-wrapper.mly-wrapper')
-	                .classed('hide', false);
+	    return null;
+	  };
 
-	            _mlyViewer.resize();
-	        }
+	  _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;
+	  };
 
-	        return this;
-	    },
+	  _this.moveRecent = function (item, beforeItem) {
+	    var recents = _this.getRecents();
 
+	    var fromIndex = recents.indexOf(item);
+	    var toIndex = recents.indexOf(beforeItem);
 
-	    hideViewer: function(context) {
-	        _mlySelectedImageKey = null;
+	    var items = _this.moveItem(recents, fromIndex, toIndex);
 
-	        if (!_mlyFallback && _mlyViewer) {
-	            _mlyViewer.getComponent('sequence').stop();
-	        }
+	    if (items) setRecents(items);
+	  };
 
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(null); }
+	  _this.setMostRecent = function (preset) {
+	    if (preset.searchable === false) return;
 
-	        viewer
-	            .classed('hide', true)
-	            .selectAll('.photo-wrapper')
-	            .classed('hide', true);
+	    var items = _this.getRecents();
 
-	        context.container().selectAll('.viewfield-group, .sequence, .icon-detected')
-	            .classed('currentView', false);
+	    var item = _this.recentMatching(preset);
 
-	        return this.setStyles(context, null, true);
-	    },
+	    if (item) {
+	      items.splice(items.indexOf(item), 1);
+	    } else {
+	      item = RibbonItem(preset, 'recent');
+	    } // remove the last recent (first in, first out)
 
 
-	    parsePagination: parsePagination,
+	    while (items.length >= MAXRECENTS) {
+	      items.pop();
+	    } // prepend array
 
 
-	    updateViewer: function(context, imageKey) {
-	        if (!imageKey) { return this; }
+	    items.unshift(item);
+	    setRecents(items);
+	  };
 
-	        if (!_mlyViewer) {
-	            this.initViewer(context, imageKey);
-	        } else {
-	            _mlyViewer.moveToKey(imageKey)
-	                .catch(function(e) { console.error('mly3', e); });  // eslint-disable-line no-console
-	        }
+	  function setFavorites(items) {
+	    _favorites = items;
+	    var minifiedItems = items.map(function (d) {
+	      return d.minified();
+	    });
+	    corePreferences('preset_favorites', JSON.stringify(minifiedItems)); // call update
 
-	        return this;
-	    },
+	    dispatch$1.call('favoritePreset');
+	  }
 
+	  _this.addFavorite = function (preset, besidePreset, after) {
+	    var favorites = _this.getFavorites();
 
-	    initViewer: function(context, imageKey) {
-	        var that = this;
-	        if (window.Mapillary && imageKey) {
-	            var opts = {
-	                baseImageSize: 320,
-	                component: {
-	                    cover: false,
-	                    keyboard: false,
-	                    tag: true
-	                }
-	            };
+	    var beforeItem = _this.favoriteMatching(besidePreset);
 
-	            // 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
-	                };
-	            }
+	    var toIndex = favorites.indexOf(beforeItem);
+	    if (after) toIndex += 1;
+	    var newItem = RibbonItem(preset, 'favorite');
+	    favorites.splice(toIndex, 0, newItem);
+	    setFavorites(favorites);
+	  };
 
-	            _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
-	            }
+	  _this.toggleFavorite = function (preset) {
+	    var favs = _this.getFavorites();
 
-	            var clicks = _mlyClicks;
-	            var index = clicks.indexOf(node.key);
-	            var selectedKey = _mlySelectedImageKey;
+	    var favorite = _this.favoriteMatching(preset);
 
-	            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);
-	            }
-	        }
+	    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
 
-	        function bearingChanged(e) {
-	            dispatch$4.call('bearingChanged', undefined, e);
-	        }
-	    },
 
+	      favs.push(RibbonItem(preset, 'favorite'));
+	    }
 
-	    // 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) {
+	    setFavorites(favs);
+	  };
 
-	        _mlySelectedImageKey = imageKey;
+	  _this.removeFavorite = function (preset) {
+	    var item = _this.favoriteMatching(preset);
 
-	        // 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];
+	    if (item) {
+	      var items = _this.getFavorites();
 
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(d); }
+	      items.splice(items.indexOf(item), 1);
+	      setFavorites(items);
+	    }
+	  };
 
-	        imageKey = (d && d.key) || imageKey;
-	        if (!fromViewer && imageKey) {
-	            _mlyClicks.push(imageKey);
-	        }
+	  _this.getFavorites = function () {
+	    if (!_favorites) {
+	      // fetch from local storage
+	      var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
 
-	        this.setStyles(context, null, true);
+	      if (!rawFavorites) {
+	        rawFavorites = [];
+	        corePreferences('preset_favorites', JSON.stringify(rawFavorites));
+	      }
 
-	        // 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;
-	                });
-	            });
+	      _favorites = rawFavorites.reduce(function (output, d) {
+	        var item = ribbonItemForMinified(d, 'favorite');
+	        if (item && item.preset.addable()) output.push(item);
+	        return output;
+	      }, []);
+	    }
 
-	        if (d) {
-	            this.updateDetections(d);
-	        }
+	    return _favorites;
+	  };
 
-	        return this;
-	    },
+	  _this.favoriteMatching = function (preset) {
+	    var favs = _this.getFavorites();
 
+	    for (var index in favs) {
+	      if (favs[index].matches(preset)) {
+	        return favs[index];
+	      }
+	    }
 
-	    getSelectedImageKey: function() {
-	        return _mlySelectedImageKey;
-	    },
+	    return null;
+	  };
 
+	  return utilRebind(_this, dispatch$1, 'on');
+	}
 
-	    getSequenceKeyForImageKey: function(imageKey) {
-	        return _mlyCache.sequences.forImageKey[imageKey];
-	    },
+	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;
 
-	    // 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 (entity) {
+	      extent._extend(entity.extent(graph));
+	    }
+	  }
 
-	            context.container().selectAll('.sequence')
-	                .classed('highlighted', false)
-	                .classed('currentView', false);
-	        }
+	  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
+	      });
+	    }
 
-	        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) || [];
+	    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
 
-	        var selectedImageKey = _mlySelectedImageKey;
-	        var selectedSequenceKey = selectedImageKey && this.getSequenceKeyForImageKey(selectedImageKey);
-	        var selectedLineString = selectedSequenceKey && _mlyCache.sequences.lineString[selectedSequenceKey];
-	        var selectedImageKeys = (selectedLineString && selectedLineString.properties.coordinateProperties.image_keys) || [];
+	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
 
-	        // highlight sibling viewfields on either the selected or the hovered sequences
-	        var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
+	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
 
-	        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 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
 
-	        context.container().selectAll('.layer-mapillary .sequence')
-	            .classed('highlighted', function(d) { return d.properties.key === hoveredSequenceKey; })
-	            .classed('currentView', function(d) { return d.properties.key === selectedSequenceKey; });
+	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));
 
-	        // update viewfields if needed
-	        context.container().selectAll('.viewfield-group .viewfield')
-	            .attr('d', viewfieldPath);
+	  function collectDeepDescendants(id) {
+	    if (seen.has(id)) return;
+	    seen.add(id);
 
-	        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';
-	            }
-	        }
+	    if (!idsSet.has(id)) {
+	      returners.add(id);
+	    }
 
-	        return this;
-	    },
+	    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
 
-	    updateDetections: function(d) {
-	        if (!_mlyViewer || _mlyFallback) { return; }
+	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;
 
-	        var imageKey = d && d.key;
-	        if (!imageKey) { return; }
+	  if (!name && entity.tags.ref) {
+	    name = entity.tags.ref;
 
-	        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]);
-	            }
-	        });
+	    if (network) {
+	      name = network + ' ' + name;
+	    }
+	  }
 
-	        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,
-	                    }
-	                );
+	  return name;
+	}
+	function utilDisplayNameForPath(entity) {
+	  var name = utilDisplayName(entity);
+	  var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
 
-	            } 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
-	                    }
-	                );
-	            }
+	  if (!isFirefox && name && rtlRegex.test(name)) {
+	    name = fixRTLTextForSvg(name);
+	  }
 
-	            return tag;
-	        }
-	    },
+	  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);
 
+	  if (displayName) {
+	    // use the display name if there is one
+	    return displayName;
+	  }
 
-	    cache: function() {
-	        return _mlyCache;
-	    }
+	  var preset = typeof graphOrGeometry === 'string' ? _mainPresetIndex.matchTags(entity.tags, graphOrGeometry) : _mainPresetIndex.match(entity, graphOrGeometry);
 
-	};
+	  if (preset && preset.name()) {
+	    // use the preset name if there is a match
+	    return preset.name();
+	  } // fallback to the display type (node/way/relation)
 
-	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
 
-	    this.id = generateID.apply(this);      // generated - see below
-	    this.autoFix = null;                   // generated - if autofix exists, will be set below
+	  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 ]
+	// }
 
-	    // A unique, deterministic string hash.
-	    // Issues with identical id values are considered identical.
-	    function generateID() {
-	        var parts = [this.type];
+	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 (this.hash) {   // subclasses can pass in their own differentiator
-	            parts.push(this.hash);
+	      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);
+	          }
 	        }
+	      }
 
-	        if (this.subtype) {
-	            parts.push(this.subtype);
-	        }
+	      var tagHash = key + '=' + value;
+	      if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
+	      tagCounts[tagHash] += 1;
+	    });
+	  });
 
-	        // 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);
-	        }
+	  for (var key in tags) {
+	    if (!Array.isArray(tags[key])) continue; // sort values by frequency then alphabetically
 
-	        return parts.join(':');
-	    }
+	    tags[key] = tags[key].sort(function (val1, val2) {
+	      var key = key; // capture
 
-	    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;
-	    };
+	      var count2 = tagCounts[key + '=' + val2];
+	      var count1 = tagCounts[key + '=' + val1];
 
-	    this.fixes = function(context) {
-	        var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
-	        var issue = this;
+	      if (count2 !== count1) {
+	        return count2 - count1;
+	      }
 
-	        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);
-	                }
-	            }));
-	        }
+	      if (val2 && val1) {
+	        return val1.localeCompare(val2);
+	      }
 
-	        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;
-	    };
+	      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++;
+	  }
 
-	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.issue = null;    // Generated link - added by validationIssue
-	}
+	  str = str.slice(i);
+	  return str.split('&').reduce(function (obj, pair) {
+	    var parts = pair.split('=');
 
-	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];
+	    if (parts.length === 2) {
+	      obj[parts[0]] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
+	    }
 
-	            return function(tags) {
-	                return tags[key] > value;
-	            };
-	        },
-	        greaterThanEqual: function(greaterThanEqual) {
-	            var key = Object.keys(greaterThanEqual)[0];
-	            var value = greaterThanEqual[key];
+	    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 function(tags) {
-	                return tags[key] >= value;
-	            };
-	        },
-	        lessThan: function(lessThan) {
-	            var key = Object.keys(lessThan)[0];
-	            var value = lessThan[key];
+	  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);
 
-	            return function(tags) {
-	                return tags[key] < value;
-	            };
-	        },
-	        lessThanEqual: function(lessThanEqual) {
-	            var key = Object.keys(lessThanEqual)[0];
-	            var value = lessThanEqual[key];
+	  while (++i < n) {
+	    if (prefixes[i] + property in s) {
+	      return prefixes[i] + property;
+	    }
+	  }
 
-	            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);
+	  return false;
+	}
+	function utilPrefixCSSProperty(property) {
+	  var prefixes = ['webkit', 'ms', 'Moz', 'O'];
+	  var i = -1;
+	  var n = prefixes.length;
+	  var s = document.body.style;
 
-	            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 (property.toLowerCase() in s) {
+	    return property.toLowerCase();
+	  }
 
-	            return function(tags) {
-	                return !regex.test(tags[tagKey]);
-	            };
-	        }
-	    };
-	};
+	  while (++i < n) {
+	    if (prefixes[i] + property in s) {
+	      return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
+	    }
+	  }
 
-	var buildLineKeys = function() {
-	    return {
-	        highway: {
-	            rest_area: true,
-	            services: true
-	        },
-	        railway: {
-	            roundhouse: true,
-	            station: true,
-	            traverser: true,
-	            turntable: true,
-	            wash: true
-	        }
-	    };
-	};
+	  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.
 
-	var serviceMapRules = {
-	    init: function() {
-	        this._ruleChecks  = buildRuleChecks();
-	        this._validationRules = [];
-	        this._areaKeys = osmAreaKeys;
-	        this._lineKeys = buildLineKeys();
-	    },
+	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;
 
-	    // 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;
-	        }, []);
-	    },
+	  for (i = 0; i <= b.length; i++) {
+	    matrix[i] = [i];
+	  }
 
-	    // builds tagMap from mapcss-parse selector object...
-	    buildTagMap: function(selector) {
-	        var getRegexValues = function(regexes) {
-	            return regexes.map(function(regex) {
-	                return regex.replace(/\$|\^/g, '');
-	            });
-	        };
+	  for (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
+	      }
+	    }
+	  }
 
-	        var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
-	            var values;
-	            var isRegex = /regex/gi.test(key);
-	            var isEqual = /equals/gi.test(key);
+	  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
 
-	            if (isRegex || isEqual) {
-	                Object.keys(selector[key]).forEach(function(selectorKey) {
-	                    values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
+	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]
 
-	                    if (expectedTags.hasOwnProperty(selectorKey)) {
-	                        values = values.concat(expectedTags[selectorKey]);
-	                    }
+	function utilWrap(index, length) {
+	  if (index < 0) {
+	    index += Math.ceil(-index / length) * length;
+	  }
 
-	                    expectedTags[selectorKey] = values;
-	                });
+	  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
+	 */
 
-	            } else if (/(greater|less)Than(Equal)?|presence/g.test(key)) {
-	                var tagKey = /presence/.test(key) ? selector[key] : Object.keys(selector[key])[0];
+	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/
 
-	                values = [selector[key][tagKey]];
+	function utilHashcode(str) {
+	  var hash = 0;
 
-	                if (expectedTags.hasOwnProperty(tagKey)) {
-	                    values = values.concat(expectedTags[tagKey]);
-	                }
+	  if (str.length === 0) {
+	    return hash;
+	  }
 
-	                expectedTags[tagKey] = values;
-	            }
+	  for (var i = 0; i < str.length; i++) {
+	    var _char = str.charCodeAt(i);
 
-	            return expectedTags;
-	        }, {});
+	    hash = (hash << 5) - hash + _char;
+	    hash = hash & hash; // Convert to 32bit integer
+	  }
 
-	        return tagMap;
-	    },
+	  return hash;
+	} // Returns version of `str` with all runs of special characters replaced by `_`;
+	// suitable for HTML ids, classes, selectors, etc.
 
-	    // inspired by osmWay#isArea()
-	    inferGeometry: function(tagMap) {
-	        var _lineKeys = this._lineKeys;
-	        var _areaKeys = this._areaKeys;
+	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.
 
-	        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;
-	        };
+	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.
 
-	        if (tagMap.hasOwnProperty('area')) {
-	            if (tagMap.area.indexOf('yes') > -1) {
-	                return 'area';
-	            }
-	            if (tagMap.area.indexOf('no') > -1) {
-	                return 'line';
-	            }
-	        }
+	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.
 
-	        for (var key in tagMap) {
-	            if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
-	                return 'area';
-	            }
-	            if (key in _lineKeys && keyValueImpliesLine(key)) {
-	                return 'area';
-	            }
-	        }
+	function utilUnicodeCharsTruncated(str, limit) {
+	  return Array.from(str).slice(0, limit).join('');
+	}
 
-	        return 'line';
-	    },
+	function osmEntity(attrs) {
+	  // For prototypal inheritance.
+	  if (this instanceof osmEntity) return; // Create the appropriate subtype.
 
-	    // 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);
-	    },
+	  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).
 
-	    clearRules: function() { this._validationRules = []; },
 
-	    // returns validationRules...
-	    validationRules: function() { return this._validationRules; },
+	  return new osmEntity().initialize(arguments);
+	}
 
-	    // returns ruleChecks
-	    ruleChecks: function() { return this._ruleChecks; }
+	osmEntity.id = function (type) {
+	  return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
 	};
 
-	var apibase$1 = 'https://nominatim.openstreetmap.org/';
-	var _inflight = {};
-	var _nominatimCache;
+	osmEntity.id.next = {
+	  changeset: -1,
+	  node: -1,
+	  way: -1,
+	  relation: -1
+	};
 
+	osmEntity.id.fromOSM = function (type, id) {
+	  return type[0] + id;
+	};
 
-	var serviceNominatim = {
+	osmEntity.id.toOSM = function (id) {
+	  return id.slice(1);
+	};
 
-	    init: function() {
-	        _inflight = {};
-	        _nominatimCache = new RBush();
-	    },
+	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().
 
-	    reset: function() {
-	        Object.values(_inflight).forEach(function(controller) { controller.abort(); });
-	        _inflight = {};
-	        _nominatimCache = new RBush();
-	    },
 
+	osmEntity.key = function (entity) {
+	  return entity.id + 'v' + (entity.v || 0);
+	};
 
-	    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);
-	            }
-	        });
-	    },
+	var _deprecatedTagValuesByKey;
 
+	osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
+	  if (!_deprecatedTagValuesByKey) {
+	    _deprecatedTagValuesByKey = {};
+	    dataDeprecated.forEach(function (d) {
+	      var oldKeys = Object.keys(d.old);
 
-	    reverse: function (loc, callback) {
-	        var cached = _nominatimCache.search(
-	            { minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1] }
-	        );
+	      if (oldKeys.length === 1) {
+	        var oldKey = oldKeys[0];
+	        var oldValue = d.old[oldKey];
 
-	        if (cached.length > 0) {
-	            if (callback) { callback(null, cached[0].data); }
-	            return;
+	        if (oldValue !== '*') {
+	          if (!_deprecatedTagValuesByKey[oldKey]) {
+	            _deprecatedTagValuesByKey[oldKey] = [oldValue];
+	          } else {
+	            _deprecatedTagValuesByKey[oldKey].push(oldValue);
+	          }
 	        }
+	      }
+	    });
+	  }
 
-	        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);
-	                }
-	                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); }
-	            });
-	    },
-
+	  return _deprecatedTagValuesByKey;
+	};
 
-	    search: function (val, callback) {
-	        var searchVal = encodeURIComponent(val);
-	        var url = apibase$1 + 'search/' + searchVal + '?limit=10&format=json';
+	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];
+	          }
+	        }
+	      }
+	    }
 
-	        if (_inflight[url]) { return; }
-	        var controller = new AbortController();
-	        _inflight[url] = controller;
+	    if (!this.id && this.type) {
+	      this.id = osmEntity.id(this.type);
+	    }
 
-	        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 (!this.hasOwnProperty('visible')) {
+	      this.visible = true;
 	    }
 
-	};
+	    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
 
-	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;
+	    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()
+	        );
+	      }
+	    }
 
-	function abortRequest$4(controller) {
-	    controller.abort();
-	}
+	    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;
+	      }
 
-	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; }
-	}
+	      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);
 
+	        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;
+	            }
+	          }
+	        }
 
-	function loadTiles$1(which, url, projection) {
-	    var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-	    var tiles = tiler$4.getTiles(projection);
+	        return false;
+	      });
 
-	    // 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];
-	        }
+	      if (matchesDeprecatedTags) {
+	        deprecated.push(d);
+	      }
 	    });
+	    return deprecated;
+	  }
+	};
 
-	    tiles.forEach(function(tile) {
-	        loadNextTilePage$1(which, currZoom, url, tile);
-	    });
+	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;
 
-	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; }
+	  if (tags.lanes) {
+	    count = parseInt(tags.lanes, 10);
 
-	    var controller = new AbortController();
-	    cache.inflight[id] = controller;
+	    if (count > 0) {
+	      return count;
+	    }
+	  }
 
-	    var options = {
-	        method: 'POST',
-	        signal: controller.signal,
-	        body: params,
-	        headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
-	    };
+	  switch (tags.highway) {
+	    case 'trunk':
+	    case 'motorway':
+	      count = isOneWay ? 2 : 4;
+	      break;
 
-	    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');
-	            }
+	    default:
+	      count = isOneWay ? 1 : 2;
+	      break;
+	  }
 
-	            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;
-	                }
+	  return count;
+	}
 
-	                return {
-	                    minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-	                };
-	            });
+	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);
+	}
 
-	            cache.rtree.load(features);
+	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 (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
-	            }
+	  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;
+	    }
 
-	            if (which === 'images') {
-	                dispatch$5.call('loadedImages');
-	            }
-	        })
-	        .catch(function() {
-	            cache.loaded[id] = true;
-	            delete cache.inflight[id];
-	        });
-	}
+	    forward = laneCount - bothways - backward;
+	  } else if (isNaN(backward)) {
+	    if (forward > laneCount - bothways) {
+	      forward = laneCount - bothways;
+	    }
 
+	    backward = laneCount - bothways - forward;
+	  }
 
-	// 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 {
+	    forward: forward,
+	    backward: backward,
+	    bothways: bothways
+	  };
+	}
 
-	    return tiler.getTiles(projection)
-	        .map(function(tile) { return tile.extent; });
+	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;
+	  });
+	}
 
-	// no more than `limit` results per partition.
-	function searchLimited$1(limit, projection, rtree) {
-	    limit = limit || 5;
+	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;
+	  });
+	}
 
-	    return partitionViewport$1(projection)
-	        .reduce(function(result, extent) {
-	            var found = rtree.search(extent.bbox())
-	                .slice(0, limit)
-	                .map(function(d) { return d.data; });
+	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;
+	  });
+	}
 
-	            return (found.length ? result.concat(found) : result);
-	        }, []);
+	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 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();
 
-	var serviceOpenstreetcam = {
+	      for (var i = 0; i < this.nodes.length; i++) {
+	        var node = resolver.hasEntity(this.nodes[i]);
 
-	    init: function() {
-	        if (!_oscCache) {
-	            this.reset();
+	        if (node) {
+	          extent._extend(node.extent());
 	        }
+	      }
 
-	        this.event = utilRebind(this, dispatch$5, 'on');
-	    },
+	      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
+	      }
+	    };
 
-	    reset: function() {
-	        if (_oscCache) {
-	            Object.values(_oscCache.images.inflight).forEach(abortRequest$4);
+	    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;
 	        }
 
-	        _oscCache = {
-	            images: { inflight: {}, loaded: {}, nextPage: {}, rtree: new RBush() },
-	            sequences: {}
-	        };
+	        return width;
+	      }
+	    }
 
-	        _oscSelectedImage = null;
-	    },
+	    return null;
+	  },
+	  isOneWay: function isOneWay() {
+	    // 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..
 
-	    images: function(projection) {
-	        var limit = 5;
-	        return searchLimited$1(limit, projection, _oscCache.images.rtree);
-	    },
 
+	    for (var key in this.tags) {
+	      if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) return true;
+	    }
 
-	    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;
-	    },
+	    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 null;
+	  },
+	  isSided: function isSided() {
+	    if (this.tags.two_sided === 'yes') {
+	      return false;
+	    }
 
-	    loadImages: function(projection) {
-	        var url = apibase$2 + '/1.0/list/nearby-photos/';
-	        loadTiles$1('images', url, projection);
-	    },
+	    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;
 
+	    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;
 
-	    loadViewer: function(context) {
-	        var that = this;
+	      if (curr === 0) {
+	        continue;
+	      } else if (prev && curr !== prev) {
+	        return false;
+	      }
 
-	        // add osc-wrapper
-	        var wrap = context.container().select('.photoviewer').selectAll('.osc-wrapper')
-	            .data([0]);
+	      prev = curr;
+	    }
 
-	        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 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;
+	      }
+	    }
 
-	        wrapEnter
-	            .append('div')
-	            .attr('class', 'photo-attribution fillD');
+	    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
+	        });
+	      }
 
-	        var controlsEnter = wrapEnter
-	            .append('div')
-	            .attr('class', 'photo-controls-wrap')
-	            .append('div')
-	            .attr('class', 'photo-controls');
+	      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..
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.back', step(-1))
-	            .text('◄');
+	    while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	      nodes.splice(i, 1);
+	      i = nodes.length - 1;
+	    }
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.rotate-ccw', rotate(-90))
-	            .text('⤿');
+	    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;
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.rotate-cw', rotate(90))
-	            .text('⤾');
+	    if (index === undefined) {
+	      index = max;
+	    }
 
-	        controlsEnter
-	            .append('button')
-	            .on('click.forward', step(1))
-	            .text('►');
+	    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..
 
-	        wrapEnter
-	            .append('div')
-	            .attr('class', 'osc-image-wrap');
 
+	    if (isClosed) {
+	      var connector = this.first(); // leading connectors..
 
-	        // 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 i = 1;
 
+	      while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	      } // trailing connectors..
 
-	        function zoomPan() {
-	            var t = event.transform;
-	            context.container().select('.photoviewer .osc-image-wrap')
-	                .call(utilSetTransform, t.x, t.y, t.k);
-	        }
 
+	      i = nodes.length - 1;
 
-	        function rotate(deg) {
-	            return function() {
-	                if (!_oscSelectedImage) { return; }
-	                var sequenceKey = _oscSelectedImage.sequence_id;
-	                var sequence = _oscCache.sequences[sequenceKey];
-	                if (!sequence) { return; }
+	      while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	        i = nodes.length - 1;
+	      }
+	    }
 
-	                var r = sequence.rotation || 0;
-	                r += deg;
+	    nodes.splice(index, 0, id);
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-	                if (r > 180) { r -= 360; }
-	                if (r < -180) { r += 360; }
-	                sequence.rotation = r;
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
-	                var wrap = context.container().select('.photoviewer .osc-wrapper');
+	    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;
 
-	                wrap
-	                    .transition()
-	                    .duration(100)
-	                    .call(imgZoom.transform, identity$2);
+	    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..
 
-	                wrap.selectAll('.osc-image')
-	                    .transition()
-	                    .duration(100)
-	                    .style('transform', 'rotate(' + r + 'deg)');
-	            };
-	        }
 
-	        function step(stepBy) {
-	            return function() {
-	                if (!_oscSelectedImage) { return; }
-	                var sequenceKey = _oscSelectedImage.sequence_id;
-	                var sequence = _oscCache.sequences[sequenceKey];
-	                if (!sequence) { return; }
+	    if (isClosed) {
+	      var connector = this.first(); // leading connectors..
 
-	                var nextIndex = _oscSelectedImage.sequence_index + stepBy;
-	                var nextImage = sequence.images[nextIndex];
-	                if (!nextImage) { return; }
+	      var i = 1;
 
-	                context.map().centerEase(nextImage.loc);
+	      while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index > i) index--;
+	      } // trailing connectors..
 
-	                that
-	                    .selectImage(context, nextImage)
-	                    .updateViewer(context, nextImage);
-	            };
-	        }
-	    },
 
+	      i = nodes.length - 1;
 
-	    showViewer: function(context) {
-	        var viewer = context.container().select('.photoviewer')
-	            .classed('hide', false);
+	      while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+	        nodes.splice(i, 1);
+	        if (index === i) index = 0; // update leading connector instead
 
-	        var isHidden = viewer.selectAll('.photo-wrapper.osc-wrapper.hide').size();
+	        i = nodes.length - 1;
+	      }
+	    }
 
-	        if (isHidden) {
-	            viewer
-	                .selectAll('.photo-wrapper:not(.osc-wrapper)')
-	                .classed('hide', true);
+	    nodes.splice(index, 1, id);
+	    nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-	            viewer
-	                .selectAll('.photo-wrapper.osc-wrapper')
-	                .classed('hide', false);
-	        }
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
-	        return this;
-	    },
+	    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..
 
-	    hideViewer: function(context) {
-	        _oscSelectedImage = null;
+	    if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+	      nodes.push(nodes[0]);
+	    }
 
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(null); }
+	    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)
+	      }
+	    };
 
-	        viewer
-	            .classed('hide', true)
-	            .selectAll('.photo-wrapper')
-	            .classed('hide', true);
+	    if (changeset_id) {
+	      r.way['@changeset'] = changeset_id;
+	    }
 
-	        context.container().selectAll('.viewfield-group, .sequence, .icon-sign')
-	            .classed('currentView', false);
+	    return r;
+	  },
+	  asGeoJSON: function asGeoJSON(resolver) {
+	    return resolver["transient"](this, 'GeoJSON', function () {
+	      var coordinates = resolver.childNodes(this).map(function (n) {
+	        return n.loc;
+	      });
 
-	        return this.setStyles(context, null, true);
-	    },
+	      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;
+	        })]
+	      };
 
+	      if (!this.isClosed() && nodes.length) {
+	        json.coordinates[0].push(nodes[0].loc);
+	      }
 
-	    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('|');
-	            }
+	      var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
+	      // that OpenStreetMap polygons are not hemisphere-spanning.
 
-	            if (d.captured_at) {
-	                attribution
-	                    .append('span')
-	                    .attr('class', 'captured_at')
-	                    .text(localeDateString(d.captured_at));
+	      if (area > 2 * Math.PI) {
+	        json.coordinates[0] = json.coordinates[0].reverse();
+	        area = d3_geoArea(json);
+	      }
 
-	                attribution
-	                    .append('span')
-	                    .text('|');
-	            }
+	      return isNaN(area) ? 0 : area;
+	    });
+	  }
+	}); // Filter function to eliminate consecutive duplicates.
 
-	            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');
-	        }
+	function noRepeatNodes(node, i, arr) {
+	  return i === 0 || node !== arr[i - 1];
+	}
 
-	        return this;
+	//
+	// 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;
+	  }
 
-	        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);
-	        }
-	    },
+	  var outerMember;
 
+	  for (var memberIndex in entity.members) {
+	    var member = entity.members[memberIndex];
 
-	    selectImage: function(context, d) {
-	        _oscSelectedImage = d;
-	        var viewer = context.container().select('.photoviewer');
-	        if (!viewer.empty()) { viewer.datum(d); }
+	    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);
 
-	        this.setStyles(context, null, true);
+	      if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
+	        return false;
+	      }
+	    }
+	  }
 
-	        context.container().selectAll('.icon-sign')
-	            .classed('currentView', false);
+	  return outerMember;
+	} // For fixing up rendering of multipolygons with tags on the outer member.
+	// https://github.com/openstreetmap/iD/issues/613
 
-	        return this;
-	    },
+	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
 
-	    getSelectedImage: function() {
-	        return _oscSelectedImage;
-	    },
+	    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;
 
-	    getSequenceKeyForImage: function(d) {
-	        return d && d.sequence_id;
-	    },
+	  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
 
-	    // 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);
+	      outerMember = member;
+	    }
+	  }
 
-	            context.container().selectAll('.sequence')
-	                .classed('highlighted', false)
-	                .classed('currentView', false);
-	        }
+	  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 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; })) || [];
+	function osmJoinWays(toJoin, graph) {
+	  function resolve(member) {
+	    return graph.childNodes(graph.entity(member.id));
+	  }
 
-	        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';
-	            }
-	        }
+	  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
 
-	        return this;
-	    },
 
+	  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;
 
-	    cache: function() {
-	        return _oscCache;
+	  for (i = 0; i < toJoin.length; i++) {
+	    if (toJoin[i] instanceof osmWay) {
+	      joinAsMembers = false;
+	      break;
 	    }
+	  }
 
-	};
+	  var sequences = [];
+	  sequences.actions = [];
 
-	/**
-	 * 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');
-	}
+	  while (toJoin.length) {
+	    // start a new sequence
+	    var item = toJoin.shift();
+	    var currWays = [item];
+	    var currNodes = resolve(item).slice(); // add to it
+
+	    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
+
+	          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;
+	        }
+	      }
 
-	/** Detect free variable `global` from Node.js. */
-	var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+	      if (!nodes) {
+	        // couldn't find a joinable way/member
+	        break;
+	      }
 
-	/** Detect free variable `self`. */
-	var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+	      fn.apply(currWays, [item]);
+	      fn.apply(currNodes, nodes);
+	      toJoin.splice(i, 1);
+	    }
 
-	/** Used as a reference to the global object. */
-	var root$2 = freeGlobal || freeSelf || Function('return this')();
+	    currWays.nodes = currNodes;
+	    sequences.push(currWays);
+	  }
 
-	/**
-	 * 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();
-	};
+	  return sequences;
+	}
 
-	/** Built-in value references. */
-	var Symbol$1 = root$2.Symbol;
+	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.
 
-	/** Used for built-in method references. */
-	var objectProto = Object.prototype;
+	    var isPTv2 = /stop|platform/.test(member.role);
 
-	/** Used to check objects for own properties. */
-	var hasOwnProperty$2 = objectProto.hasOwnProperty;
+	    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;
+	      }
 
-	/**
-	 * Used to resolve the
-	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-	 * of values.
-	 */
-	var nativeObjectToString = objectProto.toString;
+	      graph = graph.replace(relation.addMember(member, memberIndex));
+	    }
 
-	/** Built-in value references. */
-	var symToStringTag = Symbol$1 ? Symbol$1.toStringTag : undefined;
+	    return graph;
+	  }; // Add a way member into the relation "wherever it makes sense".
+	  // In this situation we were not supplied a memberIndex.
 
-	/**
-	 * 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];
+	  function addWayMember(relation, graph) {
+	    var groups, tempWay, item, i, j, k; // remove PTv2 stops and platforms before doing anything.
 
-	  try {
-	    value[symToStringTag] = undefined;
-	    var unmasked = true;
-	  } catch (e) {}
+	    var PTv2members = [];
+	    var members = [];
 
-	  var result = nativeObjectToString.call(value);
-	  if (unmasked) {
-	    if (isOwn) {
-	      value[symToStringTag] = tag;
-	    } else {
-	      delete value[symToStringTag];
+	    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);
+	      }
 	    }
-	  }
-	  return result;
-	}
 
-	/** Used for built-in method references. */
-	var objectProto$1 = Object.prototype;
+	    relation = relation.update({
+	      members: members
+	    });
 
-	/**
-	 * 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;
+	    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);
+	    }
 
-	/**
-	 * 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);
-	}
+	    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
 
-	/** `Object#toString` result references. */
-	var nullTag = '[object Null]',
-	    undefinedTag = '[object Undefined]';
+	    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
 
-	/** Built-in value references. */
-	var symToStringTag$1 = Symbol$1 ? Symbol$1.toStringTag : undefined;
+	      for (j = 0; j < members.length; j++) {
+	        if (members[j].index === startIndex) {
+	          break;
+	        }
+	      } // k = each member in segment
 
-	/**
-	 * 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;
-	  }
-	  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';
-	}
+	      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
 
-	/** `Object#toString` result references. */
-	var symbolTag = '[object Symbol]';
+	        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
 
-	/**
-	 * 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);
-	}
 
-	/** Used as references for various `Number` constants. */
-	var NAN = 0 / 0;
+	        if (k > 0) {
+	          if (j + k >= members.length || item.index !== members[j + k].index) {
+	            moveMember(members, item.index, j + k);
+	          }
+	        }
 
-	/** Used to match leading and trailing whitespace. */
-	var reTrim = /^\s+|\s+$/g;
+	        nodes.splice(0, way.nodes.length - 1);
+	      }
+	    }
 
-	/** Used to detect bad signed hexadecimal string values. */
-	var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+	    if (tempWay) {
+	      graph = graph.remove(tempWay);
+	    } // Final pass: skip dead items, split pairs, remove index properties
 
-	/** Used to detect binary string values. */
-	var reIsBinary = /^0b[01]+$/i;
 
-	/** Used to detect octal string values. */
-	var reIsOctal = /^0o[0-7]+$/i;
+	    var wayMembers = [];
 
-	/** Built-in method references without a dependency on `root`. */
-	var freeParseInt = parseInt;
+	    for (i = 0; i < members.length; i++) {
+	      item = members[i];
+	      if (item.index === -1) continue;
 
-	/**
-	 * 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);
-	}
+	      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
 
-	/** Error message constants. */
-	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;
+	    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
+	    //
 
-	/**
-	 * 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;
+	    function moveMember(arr, findIndex, toIndex) {
+	      var i;
 
-	  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;
-	  }
+	      for (i = 0; i < arr.length; i++) {
+	        if (arr[i].index === findIndex) {
+	          break;
+	        }
+	      }
 
-	  function invokeFunc(time) {
-	    var args = lastArgs,
-	        thisArg = lastThis;
+	      var item = Object.assign({}, arr[i]); // shallow copy
 
-	    lastArgs = lastThis = undefined;
-	    lastInvokeTime = time;
-	    result = func.apply(thisArg, args);
-	    return result;
-	  }
+	      arr[i].index = -1; // mark as dead
 
-	  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;
-	  }
+	      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 remainingWait(time) {
-	    var timeSinceLastCall = time - lastCallTime,
-	        timeSinceLastInvoke = time - lastInvokeTime,
-	        timeWaiting = wait - timeSinceLastCall;
 
-	    return maxing
-	      ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
-	      : timeWaiting;
-	  }
+	    function withIndex(arr) {
+	      var result = new Array(arr.length);
 
-	  function shouldInvoke(time) {
-	    var timeSinceLastCall = time - lastCallTime,
-	        timeSinceLastInvoke = time - lastInvokeTime;
+	      for (var i = 0; i < arr.length; i++) {
+	        result[i] = Object.assign({}, arr[i]); // shallow copy
 
-	    // 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));
-	  }
+	        result[i].index = i;
+	      }
 
-	  function timerExpired() {
-	    var time = now$1();
-	    if (shouldInvoke(time)) {
-	      return trailingEdge(time);
+	      return result;
 	    }
-	    // Restart the timer.
-	    timerId = setTimeout(timerExpired, remainingWait(time));
 	  }
+	}
 
-	  function trailingEdge(time) {
-	    timerId = undefined;
+	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.
 
-	    // Only invoke if we have `lastArgs` which means `func` has been
-	    // debounced at least once.
-	    if (trailing && lastArgs) {
-	      return invokeFunc(time);
-	    }
-	    lastArgs = lastThis = undefined;
-	    return result;
-	  }
+	          return;
+	        }
+	      }
+	    });
+	    return graph;
+	  };
+	}
 
-	  function cancel() {
-	    if (timerId !== undefined) {
-	      clearTimeout(timerId);
-	    }
-	    lastInvokeTime = 0;
-	    lastArgs = lastCallTime = lastThis = timerId = undefined;
-	  }
+	// 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 flush() {
-	    return timerId === undefined ? result : trailingEdge(now$1());
-	  }
+	function actionChangeMember(relationId, member, memberIndex) {
+	  return function (graph) {
+	    return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
+	  };
+	}
 
-	  function debounced() {
-	    var time = now$1(),
-	        isInvoking = shouldInvoke(time);
+	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
+	    }));
+	  };
+	}
 
-	    lastArgs = arguments;
-	    lastThis = this;
-	    lastCallTime = time;
+	function actionChangeTags(entityId, tags) {
+	  return function (graph) {
+	    var entity = graph.entity(entityId);
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
+	  };
+	}
 
-	    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;
+	function osmNode() {
+	  if (!(this instanceof osmNode)) {
+	    return new osmNode().initialize(arguments);
+	  } else if (arguments.length) {
+	    this.initialize(arguments);
 	  }
-	  debounced.cancel = cancel;
-	  debounced.flush = flush;
-	  return debounced;
 	}
+	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
 
-	/** Error message constants. */
-	var FUNC_ERROR_TEXT$1 = 'Expected a function';
+	      var re = /:direction$/i;
+	      var keys = Object.keys(this.tags);
 
-	/**
-	 * 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;
+	      for (i = 0; i < keys.length; i++) {
+	        if (re.test(keys[i])) {
+	          val = this.tags[keys[i]].toLowerCase();
+	          break;
+	        }
+	      }
+	    }
 
-	  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;
+	    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 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);
+
+	      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 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
+	    };
 	  }
-	  return debounce(func, wait, {
-	    'leading': leading,
-	    'maxWait': wait,
-	    'trailing': trailing
-	  });
-	}
+	});
 
-	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 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 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));
-	        }
-	      }
+	    if (!way.isConvex(graph)) {
+	      graph = action.makeConvex(graph);
 	    }
-	    return output;
-	  }
 
-	  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;
-	        }
+	    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));
 	      }
-	    }
-	    return arr.join('');
-	  }
 
-	  /**
-	   * Add integers, wrapping at 2^32. This uses 16-bit operations internally
-	   * to work around bugs in some JS interpreters.
-	   */
+	      do {
+	        numberNewPoints++;
+	        eachAngle = totalAngle / (indexRange + numberNewPoints);
+	      } while (Math.abs(eachAngle) > maxAngle); // move existing nodes
 
-	  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.
-	   */
+	      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
 
-	  function bit_rol(num, cnt) {
-	    return (num << cnt) | (num >>> (32 - cnt));
-	  }
 
-	  /**
-	   * Convert a raw string to a hex string
-	   */
+	      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 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;
-	  }
+	        var min = Infinity;
 
-	  /**
-	   * Convert an array of big-endian words to a string
-	   */
+	        for (var nodeId in nearNodes) {
+	          var nearAngle = nearNodes[nodeId];
+	          var dist = Math.abs(nearAngle - angle);
 
-	  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;
-	  }
+	          if (dist < min) {
+	            min = dist;
+	            origNode = origNodes[nodeId];
+	          }
+	        }
 
-	  /**
-	   * Convert an array of little-endian words to a string
-	   */
+	        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 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;
-	  }
 
-	  /**
-	   * Convert a raw string to an array of little-endian words
-	   * Characters >255 have their high-byte silently ignored.
-	   */
+	      if (indexRange === 1 && inBetweenNodes.length) {
+	        var startIndex1 = way.nodes.lastIndexOf(startNode.id);
+	        var endIndex1 = way.nodes.lastIndexOf(endNode.id);
+	        var wayDirection1 = endIndex1 - startIndex1;
 
-	  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;
-	    }
-	    for (i = 0; i < l; i += 8) {
-	      output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (i % 32);
-	    }
-	    return output;
-	  }
+	        if (wayDirection1 < -1) {
+	          wayDirection1 = 1;
+	        }
 
-	  /**
-	   * Convert a raw string to an array of big-endian words
-	   * Characters >255 have their high-byte silently ignored.
-	   */
+	        var parentWays = graph.parentWays(keyNodes[i]);
 
-	  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);
-	    }
-	    return output;
-	  }
+	        for (j = 0; j < parentWays.length; j++) {
+	          var sharedWay = parentWays[j];
+	          if (sharedWay === way) continue;
 
-	  /**
-	   * Convert a raw string to an arbitrary string encoding
-	   */
+	          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;
+	            }
 
-	  function rstr2any(input, encoding) {
-	    var divisor = encoding.length,
-	      remainders = Array(),
-	      i, q, x, ld, quotient, dividend, output, full_length;
+	            if (wayDirection1 !== wayDirection2) {
+	              inBetweenNodes.reverse();
+	              insertAt = startIndex2;
+	            }
 
-	    /* 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);
-	    }
+	            for (k = 0; k < inBetweenNodes.length; k++) {
+	              sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
+	            }
 
-	    /**
-	     * 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;
+	            graph = graph.replace(sharedWay);
+	          }
 	        }
 	      }
-	      remainders[remainders.length] = x;
-	      dividend = quotient;
-	    }
+	    } // update the way to have all the new nodes
 
-	    /* Convert the remainders to the output string */
-	    output = '';
-	    for (i = remainders.length - 1; i >= 0; i--) {
-	      output += encoding.charAt(remainders[i]);
-	    }
 
-	    /* 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;
+	    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();
 	    }
-	    return output;
-	  }
 
-	  /**
-	   * Convert a raw string to a base-64 string
-	   */
+	    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 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);
-	        }
+	      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 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 graph;
+	  };
 
-	      // public method for encoding
-	      this.encode = function(input) {
-	        var i, j, triplet,
-	          output = '',
-	          len = input.length;
+	  action.disabled = function (graph) {
+	    if (!graph.entity(wayId).isClosed()) {
+	      return 'not_closed';
+	    } //disable when already circular
 
-	        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;
-	      };
+	    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;
 
-	      // 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 (hull.length !== points.length || hull.length < 3) {
+	      return false;
+	    }
 
-	        i = ac = 0;
-	        input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
-	        //input += '';
+	    var centroid = d3_polygonCentroid(points);
+	    var radius = geoVecLengthSquare(centroid, points[0]);
+	    var i, actualPoint; // compare distances between centroid and points
 
-	        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));
+	    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%)
 
-	          bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
+	      if (diff > 0.05 * radius) {
+	        return false;
+	      }
+	    } //check if central angles are smaller than maxAngle
 
-	          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 {
-	            arr[ac] = String.fromCharCode(o1, o2, o3);
-	          }
-	        } while (i < input.length);
+	    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;
 
-	        dec = arr.join('');
-	        dec = (utf8) ? utf8Decode(dec) : dec;
+	      if (angle < 0) {
+	        angle = -angle;
+	      }
 
-	        return dec;
-	      };
+	      if (angle > Math.PI) {
+	        angle = 2 * Math.PI - angle;
+	      }
 
-	      // 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;
-	      };
-	    },
+	      if (angle > maxAngle + epsilonAngle) {
+	        return false;
+	      }
+	    }
 
-	    /**
-	     * 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
+	    return 'already_circular';
+	  };
 
-	      // 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;
-	      };
+	  action.transitionable = true;
+	  return action;
+	}
 
-	      // private methods
+	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
 
-	      /**
-	       * Calculate the MD5 of a raw string
-	       */
+	    if (geometries.point) return false; // delete if this node only be a vertex
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binl2rstr(binl(rstr2binl(s), s.length * 8));
-	      }
+	    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
 
-	      /**
-	       * Calculate the HMAC-MD5, of a key and some data (raw strings)
-	       */
+	    return !node.hasInterestingTags();
+	  }
 
-	      function rstr_hmac(key, data) {
-	        var bkey, ipad, opad, hash, i;
+	  var action = function action(graph) {
+	    var way = graph.entity(wayID);
+	    graph.parentRelations(way).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(wayID);
+	      graph = graph.replace(parent);
 
-	        key = (utf8) ? utf8Encode(key) : key;
-	        data = (utf8) ? utf8Encode(data) : data;
-	        bkey = rstr2binl(key);
-	        if (bkey.length > 16) {
-	          bkey = binl(bkey, key.length * 8);
-	        }
+	      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);
 
-	        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));
+	      if (canDeleteNode(node, graph)) {
+	        graph = graph.remove(node);
 	      }
+	    });
+	    return graph.remove(way);
+	  };
 
-	      /**
-	       * Calculate the MD5 of an array of little-endian words, and a bit length.
-	       */
+	  return action;
+	}
 
-	      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);
+	function actionDeleteMultiple(ids) {
+	  var actions = {
+	    way: actionDeleteWay,
+	    node: actionDeleteNode,
+	    relation: actionDeleteRelation
+	  };
+
+	  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;
+	  };
 
-	      /**
-	       * These functions implement the four basic operations the algorithm uses.
-	       */
+	  return action;
+	}
 
-	      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 actionDeleteRelation(relationID, allowUntaggedMembers) {
+	  function canDeleteEntity(entity, graph) {
+	    return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
+	  }
 
-	      function md5_ff(a, b, c, d, x, s, t) {
-	        return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
-	      }
+	  var action = function action(graph) {
+	    var relation = graph.entity(relationID);
+	    graph.parentRelations(relation).forEach(function (parent) {
+	      parent = parent.removeMembersWithID(relationID);
+	      graph = graph.replace(parent);
 
-	      function md5_gg(a, b, c, d, x, s, t) {
-	        return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
+	      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;
+	}
 
-	      function md5_hh(a, b, c, d, x, s, t) {
-	        return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+	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);
 
-	      function md5_ii(a, b, c, d, x, s, t) {
-	        return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
+	      if (parent.isDegenerate()) {
+	        graph = actionDeleteRelation(parent.id)(graph);
 	      }
-	    },
-	    /**
-	     * @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 graph.remove(node);
+	  };
 
-	      // 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;
-	        }
-	        return this;
-	      };
+	  return action;
+	}
 
-	      // private methods
+	//
+	// 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
+	//
 
-	      /**
-	       * Calculate the SHA-512 of a raw string
-	       */
+	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
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binb2rstr(binb(rstr2binb(s), s.length * 8));
-	      }
+	    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.
 
-	      /**
-	       * Calculate the HMAC-SHA1 of a key and some data (raw strings)
-	       */
 
-	      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 (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      if (node.id === survivor.id) continue;
+	      parents = graph.parentWays(node);
 
-	        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));
+	      for (j = 0; j < parents.length; j++) {
+	        graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
 	      }
 
-	      /**
-	       * 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);
-	            }
-	            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;
-	          }
+	      parents = graph.parentRelations(node);
 
-	          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);
+	      for (j = 0; j < parents.length; j++) {
+	        graph = graph.replace(parents[j].replaceMember(node, survivor));
 	      }
 
-	      /**
-	       * Perform the appropriate triplet combination function for the current
-	       * iteration
-	       */
+	      survivor = survivor.mergeTags(node.tags);
+	      graph = actionDeleteNode(node.id)(graph);
+	    }
 
-	      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;
-	      }
+	    graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices
 
-	      /**
-	       * Determine the appropriate additive constant for the current iteration
-	       */
+	    parents = graph.parentWays(survivor);
 
-	      function sha1_kt(t) {
-	        return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
-	          (t < 60) ? -1894007588 : -899497514;
+	    for (i = 0; i < parents.length; i++) {
+	      if (parents[i].isDegenerate()) {
+	        graph = actionDeleteWay(parents[i].id)(graph);
 	      }
-	    },
-	    /**
-	     * @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;
+	    }
 
-	      /* 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;
-	      };
+	    return graph;
+	  };
 
-	      // private methods
+	  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
 
-	      /**
-	       * Calculate the SHA-512 of a raw string
-	       */
+	    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
 
-	      function rstr(s, utf8) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binb2rstr(binb(rstr2binb(s), s.length * 8));
-	      }
 
-	      /**
-	       * Calculate the HMAC-sha256 of a key and some data (raw strings)
-	       */
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      relations = graph.parentRelations(node);
 
-	      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);
+	      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 (bkey.length > 16) {
-	          bkey = binb(bkey, key.length * 8);
+	        if (relation.hasFromViaTo()) {
+	          restrictionIDs.push(relation.id);
 	        }
 
-	        for (; i < 16; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	        if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
+	          return 'relation';
+	        } else {
+	          seen[relation.id] = role;
 	        }
-
-	        hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
-	        return binb2rstr(binb(opad.concat(hash), 512 + 256));
 	      }
+	    } // gather restrictions for parent ways
 
-	      /*
-	       * Main sha256 function, with its support functions
-	       */
 
-	      function sha256_S(X, n) {
-	        return (X >>> n) | (X << (32 - n));
-	      }
+	    for (i = 0; i < nodeIDs.length; i++) {
+	      node = graph.entity(nodeIDs[i]);
+	      var parents = graph.parentWays(node);
 
-	      function sha256_R(X, n) {
-	        return (X >>> n);
-	      }
+	      for (j = 0; j < parents.length; j++) {
+	        var parent = parents[j];
+	        relations = graph.parentRelations(parent);
 
-	      function sha256_Ch(x, y, z) {
-	        return ((x & y) ^ ((~x) & z));
-	      }
+	        for (k = 0; k < relations.length; k++) {
+	          relation = relations[k];
 
-	      function sha256_Maj(x, y, z) {
-	        return ((x & y) ^ (x & z) ^ (y & z));
+	          if (relation.hasFromViaTo()) {
+	            restrictionIDs.push(relation.id);
+	          }
+	        }
 	      }
+	    } // test restrictions
 
-	      function sha256_Sigma0256(x) {
-	        return (sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22));
-	      }
 
-	      function sha256_Sigma1256(x) {
-	        return (sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25));
-	      }
+	    restrictionIDs = utilArrayUniq(restrictionIDs);
 
-	      function sha256_Gamma0256(x) {
-	        return (sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3));
-	      }
+	    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: []
+	      };
 
-	      function sha256_Gamma1256(x) {
-	        return (sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10));
+	      for (j = 0; j < relation.members.length; j++) {
+	        collectNodes(relation.members[j], nodes);
 	      }
 
-	      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]);
-	            }
+	      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;
 
-	            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 (j = 0; j < nodeIDs.length; j++) {
+	        var n = nodeIDs[j];
 
-	          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 (nodes.from.indexOf(n) !== -1) {
+	          connectFrom = true;
 	        }
-	        return HASH;
-	      }
 
-	    },
-
-	    /**
-	     * @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 (nodes.via.indexOf(n) !== -1) {
+	          connectVia = true;
+	        }
 
-	      /* 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;
+	        if (nodes.to.indexOf(n) !== -1) {
+	          connectTo = true;
 	        }
-	        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;
+
+	        if (nodes.keyfrom.indexOf(n) !== -1) {
+	          connectKeyFrom = true;
 	        }
-	        return this;
-	      };
 
-	      /* private methods */
+	        if (nodes.keyto.indexOf(n) !== -1) {
+	          connectKeyTo = true;
+	        }
+	      }
 
-	      /**
-	       * Calculate the SHA-512 of a raw string
-	       */
+	      if (connectFrom && connectTo && !isUturn) {
+	        return 'restriction';
+	      }
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binb2rstr(binb(rstr2binb(s), s.length * 8));
+	      if (connectFrom && connectVia) {
+	        return 'restriction';
 	      }
-	      /*
-	       * 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;
+	      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.
 
-	        var hash, i = 0,
-	          bkey = rstr2binb(key),
-	          ipad = Array(32),
-	          opad = Array(32);
 
-	        if (bkey.length > 32) {
-	          bkey = binb(bkey, key.length * 8);
+	      if (connectKeyFrom || connectKeyTo) {
+	        if (nodeIDs.length !== 2) {
+	          return 'restriction';
 	        }
 
-	        for (; i < 32; i += 1) {
-	          ipad[i] = bkey[i] ^ 0x36363636;
-	          opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	        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];
+	          }
 	        }
 
-	        hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
-	        return binb2rstr(binb(opad.concat(hash), 1024 + 512));
-	      }
+	        if (n0 && n1) {
+	          // both nodes are part of the restriction
+	          var ok = false;
 
-	      /**
-	       * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
-	       */
+	          for (j = 0; j < memberWays.length; j++) {
+	            way = memberWays[j];
 
-	      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 (way.areAdjacent(n0, n1)) {
+	              ok = true;
+	              break;
+	            }
 	          }
 
-	          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 (!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 (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);
+	        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);
 	          }
-	          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;
+	        if (way.isDegenerate()) {
+	          return 'restriction';
 	        }
-	        return hash;
 	      }
+	    }
 
-	      //A constructor for 64-bit numbers
+	    return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
 
-	      function int64(h, l) {
-	        this.h = h;
-	        this.l = l;
-	        //this.toString = int64toString;
-	      }
+	    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;
+	      };
+	    }
 
-	      //Copies src into dst, assuming both are 64-bit numbers
+	    function collectNodes(member, collection) {
+	      var entity = graph.hasEntity(member.id);
+	      if (!entity) return;
+	      var role = member.role || '';
 
-	      function int64copy(dst, src) {
-	        dst.h = src.h;
-	        dst.l = src.l;
+	      if (!collection[role]) {
+	        collection[role] = [];
 	      }
 
-	      //Right-rotates a 64-bit number by shift
-	      //Won't handle cases of shift>=32
-	      //The function revrrot() is for that
+	      if (member.type === 'node') {
+	        collection[role].push(member.id);
 
-	      function int64rrot(dst, x, shift) {
-	        dst.l = (x.l >>> shift) | (x.h << (32 - shift));
-	        dst.h = (x.h >>> shift) | (x.l << (32 - shift));
-	      }
+	        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);
 
-	      //Reverses the dwords of the source and then rotates right by shift.
-	      //This is equivalent to rotation by 32+shift
+	        if (role === 'from' || role === 'via') {
+	          collection.keyfrom.push(entity.first());
+	          collection.keyfrom.push(entity.last());
+	        }
 
-	      function int64revrrot(dst, x, shift) {
-	        dst.l = (x.h >>> shift) | (x.l << (32 - shift));
-	        dst.h = (x.l >>> shift) | (x.h << (32 - shift));
+	        if (role === 'to' || role === 'via') {
+	          collection.keyto.push(entity.first());
+	          collection.keyto.push(entity.last());
+	        }
 	      }
+	    }
+	  };
 
-	      //Bitwise-shifts right a 64-bit number by shift
-	      //Won't handle shift>=32, but it's never needed in SHA512
+	  return action;
+	}
 
-	      function int64shr(dst, x, shift) {
-	        dst.l = (x.l >>> shift) | (x.h << (32 - shift));
-	        dst.h = (x.h >>> shift);
-	      }
+	function actionCopyEntities(ids, fromGraph) {
+	  var _copies = {};
 
-	      //Adds two 64-bit numbers
-	      //Like the original implementation, does not rely on 32-bit operations
+	  var action = function action(graph) {
+	    ids.forEach(function (id) {
+	      fromGraph.entity(id).copy(fromGraph, _copies);
+	    });
 
-	      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);
-	      }
+	    for (var id in _copies) {
+	      graph = graph.replace(_copies[id]);
+	    }
 
-	      //Same, except with 4 addends. Works faster than adding them one by one.
+	    return graph;
+	  };
 
-	      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);
-	      }
+	  action.copies = function () {
+	    return _copies;
+	  };
 
-	      //Same, except with 5 addends
+	  return action;
+	}
 
-	      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);
-	      }
-	    },
-	    /**
-	     * @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
-	        ];
+	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;
+	  };
+	}
 
-	      /* 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;
-	      };
+	function actionDiscardTags(difference, discardTags) {
+	  discardTags = discardTags || {};
+	  return function (graph) {
+	    difference.modified().forEach(checkTags);
+	    difference.created().forEach(checkTags);
+	    return graph;
 
-	      /* private methods */
+	    function checkTags(entity) {
+	      var keys = Object.keys(entity.tags);
+	      var didDiscard = false;
+	      var tags = {};
 
-	      /**
-	       * Calculate the rmd160 of a raw string
-	       */
+	      for (var i = 0; i < keys.length; i++) {
+	        var k = keys[i];
 
-	      function rstr(s) {
-	        s = (utf8) ? utf8Encode(s) : s;
-	        return binl2rstr(binl(rstr2binl(s), s.length * 8));
+	        if (discardTags[k] || !entity.tags[k]) {
+	          didDiscard = true;
+	        } else {
+	          tags[k] = entity.tags[k];
+	        }
 	      }
 
-	      /**
-	       * Calculate the HMAC-rmd160 of a key and some data (raw strings)
-	       */
+	      if (didDiscard) {
+	        graph = graph.replace(entity.update({
+	          tags: tags
+	        }));
+	      }
+	    }
+	  };
+	}
+
+	//
+	// 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 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;
+	  };
 
-	      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);
+	  action.connections = function (graph) {
+	    var candidates = [];
+	    var keeping = false;
+	    var parentWays = graph.parentWays(graph.entity(nodeId));
+	    var way, waynode;
 
-	        if (bkey.length > 16) {
-	          bkey = binl(bkey, key.length * 8);
-	        }
+	    for (var i = 0; i < parentWays.length; i++) {
+	      way = parentWays[i];
 
-	        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 (wayIds && wayIds.indexOf(way.id) === -1) {
+	        keeping = true;
+	        continue;
 	      }
 
-	      /**
-	       * Convert an array of little-endian words to a string
-	       */
+	      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;
+	            }
 
-	      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);
+	            candidates.push({
+	              wayID: way.id,
+	              index: j
+	            });
+	          }
 	        }
-	        return output;
 	      }
+	    }
 
-	      /**
-	       * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
-	       */
+	    return keeping ? candidates : candidates.slice(1);
+	  };
 
-	      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;
+	  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;
 	          }
-
-	          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;
+	        } else {
+	          seenRelationIds[relation.id] = way.id;
 	        }
-	        return [h0, h1, h2, h3, h4];
-	      }
+	      });
+	    });
+	    if (sharedRelation) return 'relation';
+	  };
 
-	      // specific algorithm methods
+	  action.limitWays = function (val) {
+	    if (!arguments.length) return wayIds;
+	    wayIds = val;
+	    return action;
+	  };
 
-	      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 action;
+	}
 
-	      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';
-	      }
+	function actionExtract(entityID) {
+	  var extractedNodeID;
 
-	      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';
-	      }
-	    }
-	  };
+	  var action = function action(graph) {
+	    var entity = graph.entity(entityID);
 
-	  // exposes Hashes
-	  (function(window, undefined$1) {
-	    var freeExports = false;
-	    {
-	      freeExports = exports;
-	      if (exports && typeof commonjsGlobal === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
-	        window = commonjsGlobal;
-	      }
+	    if (entity.type === 'node') {
+	      return extractFromNode(entity, graph);
 	    }
 
-	    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 extractFromWayOrRelation(entity, graph);
+	  };
 
-	var immutable = extend$2;
+	  function extractFromNode(node, graph) {
+	    extractedNodeID = node.id; // Create a new node to replace the one we will detach
 
-	var hasOwnProperty$3 = Object.prototype.hasOwnProperty;
+	    var replacement = osmNode({
+	      loc: node.loc
+	    });
+	    graph = graph.replace(replacement); // Process each way in turn, updating the graph as we go
 
-	function extend$2() {
-	    var arguments$1 = arguments;
+	    graph = graph.parentWays(node).reduce(function (accGraph, parentWay) {
+	      return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
+	    }, graph); // Process any relations too
 
-	    var target = {};
+	    return graph.parentRelations(node).reduce(function (accGraph, parentRel) {
+	      return accGraph.replace(parentRel.replaceMember(node, replacement));
+	    }, graph);
+	  }
 
-	    for (var i = 0; i < arguments.length; i++) {
-	        var source = arguments$1[i];
+	  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));
 
-	        for (var key in source) {
-	            if (hasOwnProperty$3.call(source, key)) {
-	                target[key] = source[key];
-	            }
-	        }
+	    if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
+	      extractedLoc = entity.extent(graph).center();
 	    }
 
-	    return target
-	}
+	    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 sha1 = new hashes.SHA1();
+	    var pointTags = {};
 
-	var ohauth = {};
+	    for (var key in entityTags) {
+	      if (entity.type === 'relation' && key === 'type') {
+	        continue;
+	      }
 
-	ohauth.qsString = function(obj) {
-	    return Object.keys(obj).sort().map(function(key) {
-	        return ohauth.percentEncode(key) + '=' +
-	            ohauth.percentEncode(obj[key]);
-	    }).join('&');
-	};
+	      if (keysToRetain.indexOf(key) !== -1) {
+	        continue;
+	      }
 
-	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;
-	    }, {});
-	};
+	      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
 
-	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;
-	};
 
-	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);
-	};
+	      if (isIndoorArea && key === 'indoor') {
+	        continue;
+	      } // copy the tag from the entity to the point
 
-	ohauth.nonce = function() {
-	    for (var o = ''; o.length < 6;) {
-	        o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
-	    }
-	    return o;
-	};
 
-	ohauth.authHeader = function(obj) {
-	    return Object.keys(obj).sort().map(function(key) {
-	        return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
-	    }).join(', ');
-	};
+	      pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features
 
-	ohauth.timestamp = function() { return ~~((+new Date()) / 1000); };
+	      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
 
-	ohauth.percentEncode = function(s) {
-	    return encodeURIComponent(s)
-	        .replace(/\!/g, '%21').replace(/\'/g, '%27')
-	        .replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
-	};
 
-	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('&');
-	};
+	      delete entityTags[key];
+	    }
 
-	ohauth.signature = function(oauth_secret, token_secret, baseString) {
-	    return sha1.b64_hmac(
-	        ohauth.percentEncode(oauth_secret) + '&' +
-	        ohauth.percentEncode(token_secret),
-	        baseString);
-	};
+	    if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
+	      // ensure that areas keep area geometry
+	      entityTags.area = 'yes';
+	    }
 
-	/**
-	 * 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.
-	 */
+	    var replacement = osmNode({
+	      loc: extractedLoc,
+	      tags: pointTags
+	    });
+	    graph = graph.replace(replacement);
+	    extractedNodeID = replacement.id;
+	    return graph.replace(entity.update({
+	      tags: entityTags
+	    }));
+	  }
 
-	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 || '';
+	  action.getExtractedNodeID = function () {
+	    return extractedNodeID;
+	  };
 
-	    return function(method, uri, extra_params) {
-	        method = method.toUpperCase();
-	        if (typeof extra_params === 'string' && extra_params.length > 0) {
-	            extra_params = ohauth.stringQs(extra_params);
-	        }
+	  return action;
+	}
 
-	        var uri_parts = uri.split('?', 2),
-	        base_uri = uri_parts[0];
+	//
+	// 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 query_params = uri_parts.length === 2 ?
-	            ohauth.stringQs(uri_parts[1]) : {};
+	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 oauth_params = {
-	            oauth_consumer_key: consumer_key,
-	            oauth_signature_method: signature_method,
-	            oauth_version: version,
-	            oauth_timestamp: ohauth.timestamp(),
-	            oauth_nonce: ohauth.nonce()
-	        };
+	    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.
 
-	        if (token) { oauth_params.oauth_token = token; }
+	    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 all_params = immutable({}, oauth_params, query_params, extra_params),
-	            base_str = ohauth.baseString(method, base_uri, all_params);
+	      survivor = survivor.mergeTags(multipolygon.tags);
+	      graph = graph.replace(survivor);
+	      graph = actionDeleteRelation(multipolygon.id, true
+	      /* allow untagged members */
+	      )(graph);
+	      var tags = Object.assign({}, survivor.tags);
 
-	        oauth_params.oauth_signature = ohauth.signature(consumer_secret, token_secret, base_str);
+	      if (survivor.geometry(graph) !== 'area') {
+	        // ensure the feature persists as an area
+	        tags.area = 'yes';
+	      }
 
-	        return 'OAuth ' + ohauth.authHeader(oauth_params);
-	    };
-	};
+	      delete tags.type; // remove type=multipolygon
 
-	var ohauth_1 = ohauth;
+	      survivor = survivor.update({
+	        tags: tags
+	      });
+	      graph = graph.replace(survivor);
+	    }
 
-	var resolveUrl$1 = createCommonjsModule(function (module, exports) {
-	// Copyright 2014 Simon Lydell
-	// X11 (“MIT”) Licensed. (See LICENSE.)
+	    checkForSimpleMultipolygon();
+	    return graph;
+	  }; // Returns the number of nodes the resultant way is expected to have
 
-	void (function(root, factory) {
-	  {
-	    module.exports = factory();
-	  }
-	}(commonjsGlobal, function() {
 
-	  function resolveUrl(/* ...urls */) {
-	    var arguments$1 = arguments;
+	  action.resultingWayNodesLength = function (graph) {
+	    return ids.reduce(function (count, id) {
+	      return count + graph.entity(id).nodes.length;
+	    }, 0) - ids.length - 1;
+	  };
 
-	    var numUrls = arguments.length;
+	  action.disabled = function (graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
 
-	    if (numUrls === 0) {
-	      throw new Error("resolveUrl requires at least one argument; got none.")
+	    if (ids.length < 2 || ids.length !== geometries.line.length) {
+	      return 'not_eligible';
 	    }
 
-	    var base = document.createElement("base");
-	    base.href = arguments[0];
+	    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 (numUrls === 1) {
-	      return base.href
+	        if (common.length !== intersections.length) {
+	          return 'paths_intersect';
+	        }
+	      }
 	    }
 
-	    var head = document.getElementsByTagName("head")[0];
-	    head.insertBefore(base, head.firstChild);
+	    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;
+	        }
+	      });
 
-	    var a = document.createElement("a");
-	    var resolved;
+	      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;
+	        }
+	      }
+	    });
 
-	    for (var index = 1; index < numUrls; index++) {
-	      a.href = arguments$1[index];
-	      resolved = a.href;
-	      base.href = resolved;
+	    if (relation) {
+	      return 'restriction';
 	    }
 
-	    head.removeChild(base);
+	    if (conflicting) {
+	      return 'conflicting_tags';
+	    }
+	  };
 
-	    return resolved
-	  }
+	  return action;
+	}
 
-	  return resolveUrl
+	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;
 
-	}));
-	});
+	      for (var i = 0; i < nodes.length; i++) {
+	        var node = nodes[i];
 
-	var assign$1 = make_assign();
-	var create$8 = make_create();
-	var trim = make_trim();
-	var Global = (typeof window !== 'undefined' ? window : commonjsGlobal);
+	        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
 
-	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
-	};
 
-	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
-			}
-		}
-	}
+	        graph = graph.replace(point.update({
+	          tags: {},
+	          loc: node.loc
+	        }));
+	        target = target.replaceNode(node.id, point.id);
+	        graph = graph.replace(target);
+	        removeNode = node;
+	        break;
+	      }
 
-	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))
-			}
-		}
-	}
+	      graph = graph.remove(removeNode);
+	    });
 
-	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, '')
-			}
-		}
-	}
+	    if (target.tags.area === 'yes') {
+	      var tags = Object.assign({}, target.tags); // shallow copy
 
-	function bind$3(obj, fn) {
-		return function() {
-			return fn.apply(obj, Array.prototype.slice.call(arguments, 0))
-		}
-	}
+	      delete tags.area;
 
-	function slice$5(arr, index) {
-		return Array.prototype.slice.call(arr, index || 0)
-	}
+	      if (osmTagSuggestingArea(tags)) {
+	        // remove the `area` tag if area geometry is now implied - #3851
+	        target = target.update({
+	          tags: tags
+	        });
+	        graph = graph.replace(target);
+	      }
+	    }
 
-	function each(obj, fn) {
-		pluck(obj, function(val, key) {
-			fn(val, key);
-			return false
-		});
-	}
+	    return graph;
+	  };
 
-	function map$5(obj, fn) {
-		var res = (isList(obj) ? [] : {});
-		pluck(obj, function(v, k) {
-			res[k] = fn(v, k);
-			return false
-		});
-		return res
-	}
+	  action.disabled = function (graph) {
+	    var geometries = groupEntitiesByGeometry(graph);
 
-	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]
-					}
-				}
-			}
-		}
-	}
+	    if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
+	      return 'not_eligible';
+	    }
+	  };
 
-	function isList(val) {
-		return (val != null && typeof val != 'function' && typeof val.length == 'number')
+	  return action;
 	}
 
-	function isFunction$2(val) {
-		return val && {}.toString.call(val) === '[object Function]'
-	}
+	//
+	// 1. move all the nodes to a common location
+	// 2. `actionConnect` them
 
-	function isObject$2(val) {
-		return val && {}.toString.call(val) === '[object Object]'
-	}
+	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;
+	      }
 
-	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;
+	      sum = geoVecAdd(sum, node.loc);
+	    }
 
-	var storeEngine = {
-		createStore: createStore
-	};
+	    return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
+	  }
 
-	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)
-		}
-	};
+	  var action = function action(graph) {
+	    if (nodeIDs.length < 2) return graph;
+	    var toLoc = loc;
 
-	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
-	}
+	    if (!toLoc) {
+	      toLoc = chooseLoc(graph);
+	    }
 
-	var Global$1 = util.Global;
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var node = graph.entity(nodeIDs[i]);
 
-	var localStorage_1 = {
-		name: 'localStorage',
-		read: read,
-		write: write,
-		each: each$2,
-		remove: remove$2,
-		clearAll: clearAll,
-	};
+	      if (node.loc !== toLoc) {
+	        graph = graph.replace(node.move(toLoc));
+	      }
+	    }
 
-	function localStorage$1() {
-		return Global$1.localStorage
-	}
+	    return actionConnect(nodeIDs)(graph);
+	  };
 
-	function read(key) {
-		return localStorage$1().getItem(key)
-	}
+	  action.disabled = function (graph) {
+	    if (nodeIDs.length < 2) return 'not_eligible';
 
-	function write(key, data) {
-		return localStorage$1().setItem(key, data)
-	}
+	    for (var i = 0; i < nodeIDs.length; i++) {
+	      var entity = graph.entity(nodeIDs[i]);
+	      if (entity.type !== 'node') return 'not_eligible';
+	    }
 
-	function each$2(fn) {
-		for (var i = localStorage$1().length - 1; i >= 0; i--) {
-			var key = localStorage$1().key(i);
-			fn(read(key), key);
-		}
-	}
+	    return actionConnect(nodeIDs).disabled(graph);
+	  };
 
-	function remove$2(key) {
-		return localStorage$1().removeItem(key)
+	  return action;
 	}
 
-	function clearAll() {
-		return localStorage$1().clear()
+	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]);
+	      }
 
-	// oldFF-globalStorage provides storage for Firefox
-	// versions 6 and 7, where no localStorage, etc
-	// is available.
+	      var ordered = {};
+	      order.forEach(function (o) {
+	        if (groups[o]) ordered[o] = groups[o];
+	      });
+	      return ordered;
+	    } // sort relations in a changeset by dependencies
 
 
-	var Global$2 = util.Global;
+	    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
 
-	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 isNew(item) {
+	        return !sorted[item['@id']] && !processing.find(function (proc) {
+	          return proc['@id'] === item['@id'];
+	        });
+	      }
 
-	function read$1(key) {
-		return globalStorage[key]
-	}
+	      var processing = [];
+	      var sorted = {};
+	      var relations = changes.relation;
+	      if (!relations) return changes;
 
-	function write$1(key, data) {
-		globalStorage[key] = data;
-	}
+	      for (var i = 0; i < relations.length; i++) {
+	        var relation = relations[i]; // skip relation if already sorted
 
-	function each$3(fn) {
-		for (var i = globalStorage.length - 1; i >= 0; i--) {
-			var key = globalStorage.key(i);
-			fn(globalStorage[key], key);
-		}
-	}
+	        if (!sorted[relation['@id']]) {
+	          processing.push(relation);
+	        }
 
-	function remove$3(key) {
-		return globalStorage.removeItem(key)
-	}
+	        while (processing.length > 0) {
+	          var next = processing[0],
+	              deps = next.member.map(resolve).filter(Boolean).filter(isNew);
 
-	function clearAll$1() {
-		each$3(function(key, _) {
-			delete globalStorage[key];
-		});
-	}
+	          if (deps.length === 0) {
+	            sorted[next['@id']] = next;
+	            processing.shift();
+	          } else {
+	            processing = deps.concat(processing);
+	          }
+	        }
+	      }
 
-	// oldIE-userDataStorage provides storage for Internet Explorer
-	// versions 6 and 7, where no localStorage, sessionStorage, etc
-	// is available.
+	      changes.relation = Object.values(sorted);
+	      return changes;
+	    }
 
+	    function rep(entity) {
+	      return entity.asJXON(changeset_id);
+	    }
 
-	var Global$3 = util.Global;
+	    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 oldIEUserDataStorage = {
-		name: 'oldIE-userDataStorage',
-		write: write$2,
-		read: read$2,
-		each: each$4,
-		remove: remove$4,
-		clearAll: clearAll$2,
+	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--;
 	};
 
-	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
+	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];
+	          }
+	        }
+	      }
+	    }
 
-	function write$2(unfixedKey, data) {
-		if (disable) { return }
-		var fixedKey = fixKey(unfixedKey);
-		_withStorageEl(function(storageEl) {
-			storageEl.setAttribute(fixedKey, data);
-			storageEl.save(storageName);
-		});
-	}
+	    if (!this.id) {
+	      this.id = osmNote.id().toString();
+	    }
 
-	function read$2(unfixedKey) {
-		if (disable) { return }
-		var fixedKey = fixKey(unfixedKey);
-		var res = null;
-		_withStorageEl(function(storageEl) {
-			res = storageEl.getAttribute(fixedKey);
-		});
-		return res
-	}
+	    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
+	    });
+	  }
+	});
 
-	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);
-			}
-		});
+	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 remove$4(unfixedKey) {
-		var fixedKey = fixKey(unfixedKey);
-		_withStorageEl(function(storageEl) {
-			storageEl.removeAttribute(fixedKey);
-			storageEl.save(storageName);
-		});
-	}
+	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;
+	};
 
-	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);
-		});
-	}
+	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();
 
-	// Helpers
-	//////////
+	      for (var i = 0; i < this.members.length; i++) {
+	        var member = resolver.hasEntity(this.members[i].id);
 
-	// 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, '___')
-	}
+	        if (member) {
+	          extent._extend(member.extent(resolver, memo));
+	        }
+	      }
 
-	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
+	      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
+	      });
+	    }
 
+	    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 = [];
 
-	var Global$4 = util.Global;
-	var trim$1 = util.trim;
+	    for (var i = 0; i < this.members.length; i++) {
+	      if (this.members[i].role === role) {
+	        result.push(Object.assign({}, this.members[i], {
+	          index: i
+	        }));
+	      }
+	    }
 
-	var cookieStorage = {
-		name: 'cookieStorage',
-		read: read$3,
-		write: write$3,
-		each: each$5,
-		remove: remove$5,
-		clearAll: clearAll$3,
-	};
+	    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
+	        });
+	      }
+	    }
 
-	var doc$1 = Global$4.document;
+	    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)
+	            }
+	          };
+	        }, this),
+	        tag: Object.keys(this.tags).map(function (k) {
+	          return {
+	            keyAttributes: {
+	              k: k,
+	              v: this.tags[k]
+	            }
+	          };
+	        }, this)
+	      }
+	    };
 
-	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"))
-	}
+	    if (changeset_id) {
+	      r.relation['@changeset'] = changeset_id;
+	    }
 
-	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);
-		}
-	}
+	    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;
+	      }
+	    }
 
-	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=/";
-	}
+	    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);
 
-	function remove$5(key) {
-		if (!key || !_has(key)) {
-			return
-		}
-		doc$1.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
-	}
+	    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]);
+	      }
 
-	function clearAll$3() {
-		each$5(function(_, key) {
-			remove$5(key);
-		});
-	}
+	      return sequence.nodes.map(function (node) {
+	        return node.loc;
+	      });
+	    };
 
-	function _has(key) {
-		return (new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=")).test(doc$1.cookie)
-	}
+	    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];
+	    });
 
-	var Global$5 = util.Global;
+	    function findOuter(inner) {
+	      var o, outer;
 
-	var sessionStorage_1 = {
-		name: 'sessionStorage',
-		read: read$4,
-		write: write$4,
-		each: each$6,
-		remove: remove$6,
-		clearAll: clearAll$4
-	};
+	      for (o = 0; o < outers.length; o++) {
+	        outer = outers[o];
+	        if (geoPolygonContainsPolygon(outer, inner)) return o;
+	      }
 
-	function sessionStorage() {
-		return Global$5.sessionStorage
-	}
+	      for (o = 0; o < outers.length; o++) {
+	        outer = outers[o];
+	        if (geoPolygonIntersectsPolygon(outer, inner, false)) return o;
+	      }
+	    }
 
-	function read$4(key) {
-		return sessionStorage().getItem(key)
-	}
+	    for (var i = 0; i < inners.length; i++) {
+	      var inner = inners[i];
 
-	function write$4(key, data) {
-		return sessionStorage().setItem(key, data)
-	}
+	      if (d3_geoArea({
+	        type: 'Polygon',
+	        coordinates: [inner]
+	      }) < 2 * Math.PI) {
+	        inner = inner.reverse();
+	      }
 
-	function each$6(fn) {
-		for (var i = sessionStorage().length - 1; i >= 0; i--) {
-			var key = sessionStorage().key(i);
-			fn(read$4(key), key);
-		}
-	}
+	      var o = findOuter(inners[i]);
 
-	function remove$6(key) {
-		return sessionStorage().removeItem(key)
-	}
+	      if (o !== undefined) {
+	        result[o].push(inners[i]);
+	      } else {
+	        result.push([inners[i]]); // Invalid geometry
+	      }
+	    }
 
-	function clearAll$4() {
-		return sessionStorage().clear()
-	}
+	    return result;
+	  }
+	});
 
-	// 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 QAItem = /*#__PURE__*/function () {
+	  function QAItem(loc, service, itemType, id, props) {
+	    _classCallCheck(this, QAItem);
 
-	var memoryStorage_1 = {
-		name: 'memoryStorage',
-		read: read$5,
-		write: write$5,
-		each: each$7,
-		remove: remove$7,
-		clearAll: clearAll$5,
-	};
+	    // 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
 
-	var memoryStorage = {};
+	    this.id = id ? id : "".concat(QAItem.id());
+	    this.update(props); // Some QA services have marker icons to differentiate issues
 
-	function read$5(key) {
-		return memoryStorage[key]
-	}
+	    if (service && typeof service.getIcon === 'function') {
+	      this.icon = service.getIcon(itemType);
+	    }
+	  }
 
-	function write$5(key, data) {
-		memoryStorage[key] = data;
-	}
+	  _createClass(QAItem, [{
+	    key: "update",
+	    value: function update(props) {
+	      var _this = this;
 
-	function each$7(callback) {
-		for (var key in memoryStorage) {
-			if (memoryStorage.hasOwnProperty(key)) {
-				callback(memoryStorage[key], key);
-			}
-		}
-	}
+	      // 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
 
-	function remove$7(key) {
-		delete memoryStorage[key];
-	}
+	  }], [{
+	    key: "id",
+	    value: function id() {
+	      return this.nextId--;
+	    }
+	  }]);
+
+	  return QAItem;
+	}();
+	QAItem.nextId = -1;
+
+	//
+	// 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];
+
+	  var _wayIDs; // the strategy for picking which way will have a new version and which way is newly created
 
-	function clearAll$5(key) {
-		memoryStorage = {};
-	}
 
-	var all = [
-		// Listed in order of usage preference
-		localStorage_1,
-		oldFFGlobalStorage,
-		oldIEUserDataStorage,
-		cookieStorage,
-		sessionStorage_1,
-		memoryStorage_1
-	];
+	  var _keepHistoryOn = 'longest'; // 'longest', 'first'
+	  // The IDs of the ways actually created by running this action
 
-	/* eslint-disable */
+	  var _createdWayIDs = [];
 
-	//  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
+	  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;
 
-	//  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
-	//  NOT CONTROL.
+	    function wrap(index) {
+	      return utilWrap(index, nodes.length);
+	    } // calculate lengths
 
-	//  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.
+	    length = 0;
 
-	//          For example, this would serialize Dates as ISO strings.
+	    for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
+	      length += dist(graph, nodes[i], nodes[wrap(i - 1)]);
+	      lengths[i] = length;
+	    }
 
-	//              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";
-	//              };
+	    length = 0;
 
-	//          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.
+	    for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
+	      length += dist(graph, nodes[i], nodes[wrap(i + 1)]);
 
-	//          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.
+	      if (length < lengths[i]) {
+	        lengths[i] = length;
+	      }
+	    } // determine best opposite node to split
 
-	//          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.
+	    for (i = 0; i < nodes.length; i++) {
+	      var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);
 
-	//          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 (cost > best) {
+	        idxB = i;
+	        best = cost;
+	      }
+	    }
 
-	//          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 idxB;
+	  }
 
-	//          Example:
+	  function totalLengthBetweenNodes(graph, nodes) {
+	    var totalLength = 0;
 
-	//          text = JSON.stringify(["e", {pluribus: "unum"}]);
-	//          // text is '["e",{"pluribus":"unum"}]'
+	    for (var i = 0; i < nodes.length - 1; i++) {
+	      totalLength += dist(graph, nodes[i], nodes[i + 1]);
+	    }
 
-	//          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
-	//          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+	    return totalLength;
+	  }
 
-	//          text = JSON.stringify([new Date()], function (key, value) {
-	//              return this[key] instanceof Date
-	//                  ? "Date(" + this[key] + ")"
-	//                  : value;
-	//          });
-	//          // text is '["Date(---current time---)"]'
+	  function split(graph, nodeId, wayA, newWayId) {
+	    var wayB = osmWay({
+	      id: newWayId,
+	      tags: wayA.tags
+	    }); // `wayB` is the NEW way
 
-	//      JSON.parse(text, reviver)
-	//          This method parses a JSON text to produce an object or array.
-	//          It can throw a SyntaxError exception.
+	    var origNodes = wayA.nodes.slice();
+	    var nodesA;
+	    var nodesB;
+	    var isArea = wayA.isArea();
+	    var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
 
-	//          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.
+	    if (wayA.isClosed()) {
+	      var nodes = wayA.nodes.slice(0, -1);
+	      var idxA = nodes.indexOf(nodeId);
+	      var idxB = splitArea(nodes, idxA, graph);
 
-	//          Example:
+	      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);
+	    }
 
-	//          // Parse the text. Values that look like ISO date strings will
-	//          // be converted to Date objects.
+	    var lengthA = totalLengthBetweenNodes(graph, nodesA);
+	    var lengthB = totalLengthBetweenNodes(graph, nodesB);
 
-	//          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;
-	//          });
+	    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
+	      });
+	    }
 
-	//          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;
-	//          });
+	    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
+	        });
+	      }
+	    }
 
-	//  This is a reference implementation. You are free to copy, modify, or
-	//  redistribute.
+	    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
 
-	/*jslint
-	    eval, for, this
-	*/
+	      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
 
-	/*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
-	*/
+	        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;
+	                }
+	              }
+	            }
+	          }
 
-	// Create a JSON object only if one does not already exist. We create the
-	// methods in a closure to avoid creating global variables.
+	          if (keepB) {
+	            relation = relation.replaceMember(wayA, wayB);
+	            graph = graph.replace(relation);
+	          } // 2. split a VIA
 
-	if (typeof JSON !== "object") {
-	    JSON = {};
-	}
+	        } 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)
 
-	(function () {
+	      } else {
+	        if (relation === isOuter) {
+	          graph = graph.replace(relation.mergeTags(wayA.tags));
+	          graph = graph.replace(wayA.update({
+	            tags: {}
+	          }));
+	          graph = graph.replace(wayB.update({
+	            tags: {}
+	          }));
+	        }
 
-	    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;
+	        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 f(n) {
-	        // Format integers to have at least two digits.
-	        return n < 10
-	            ? "0" + n
-	            : n;
+	    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: {}
+	      }));
 	    }
 
-	    function this_value() {
-	        return this.valueOf();
-	    }
+	    _createdWayIDs.push(wayB.id);
 
-	    if (typeof Date.prototype.toJSON !== "function") {
+	    return graph;
+	  }
 
-	        Date.prototype.toJSON = function () {
+	  var action = function action(graph) {
+	    _createdWayIDs = [];
+	    var newWayIndex = 0;
 
-	            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 (var i = 0; i < nodeIds.length; i++) {
+	      var nodeId = nodeIds[i];
+	      var candidates = action.waysForNode(nodeId, graph);
 
-	        Boolean.prototype.toJSON = this_value;
-	        Number.prototype.toJSON = this_value;
-	        String.prototype.toJSON = this_value;
+	      for (var j = 0; j < candidates.length; j++) {
+	        graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
+	        newWayIndex += 1;
+	      }
 	    }
 
-	    var gap;
-	    var indent;
-	    var meta;
-	    var rep;
+	    return graph;
+	  };
 
+	  action.getCreatedWayIDs = function () {
+	    return _createdWayIDs;
+	  };
 
-	    function quote(string) {
+	  action.waysForNode = function (nodeId, graph) {
+	    var node = graph.entity(nodeId);
+	    var splittableParents = graph.parentWays(node).filter(isSplittable);
 
-	// 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.
+	    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';
+	      });
 
-	        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 + "\"";
+	      if (hasLine) {
+	        return splittableParents.filter(function (parent) {
+	          return parent.geometry(graph) === 'line';
+	        });
+	      }
 	    }
 
+	    return splittableParents;
 
-	    function str(key, holder) {
-
-	// Produce a string from holder[key].
+	    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...
 
-	        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];
+	      if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.
 
-	// If the value has a toJSON method, call it to obtain a replacement value.
+	      for (var i = 1; i < parent.nodes.length - 1; i++) {
+	        if (parent.nodes[i] === nodeId) return true;
+	      }
 
-	        if (value && typeof value === "object" &&
-	                typeof value.toJSON === "function") {
-	            value = value.toJSON(key);
-	        }
+	      return false;
+	    }
+	  };
 
-	// If we were called with a replacer function, then call the replacer to
-	// obtain a replacement value.
+	  action.ways = function (graph) {
+	    return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
+	      return action.waysForNode(nodeId, graph);
+	    })));
+	  };
 
-	        if (typeof rep === "function") {
-	            value = rep.call(holder, key, value);
-	        }
+	  action.disabled = function (graph) {
+	    for (var i = 0; i < nodeIds.length; i++) {
+	      var nodeId = nodeIds[i];
+	      var candidates = action.waysForNode(nodeId, graph);
 
-	// What happens next depends on the value's type.
+	      if (candidates.length === 0 || _wayIDs && _wayIDs.length !== candidates.length) {
+	        return 'not_eligible';
+	      }
+	    }
+	  };
 
-	        switch (typeof value) {
-	        case "string":
-	            return quote(value);
+	  action.limitWays = function (val) {
+	    if (!arguments.length) return _wayIDs;
+	    _wayIDs = val;
+	    return action;
+	  };
 
-	        case "number":
+	  action.keepHistoryOn = function (val) {
+	    if (!arguments.length) return _keepHistoryOn;
+	    _keepHistoryOn = val;
+	    return action;
+	  };
 
-	// JSON numbers must be finite. Encode non-finite numbers as null.
+	  return action;
+	}
 
-	            return isFinite(value)
-	                ? String(value)
-	                : "null";
+	function coreGraph(other, mutable) {
+	  if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);
 
-	        case "boolean":
-	        case "null":
+	  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]);
+	  }
 
-	// 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.
+	  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
 
-	            return String(value);
+	    if (!entity) {
+	      entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
+	    }
 
-	// If the type is "object", we might be dealing with an object or an array or
-	// null.
+	    if (!entity) {
+	      throw new Error('entity ' + id + ' not found');
+	    }
 
-	        case "object":
+	    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] = {});
 
-	// Due to a specification blunder in ECMAScript, typeof null is "object",
-	// so watch out for that case.
+	    if (transients[key] !== undefined) {
+	      return transients[key];
+	    }
 
-	            if (!value) {
-	                return "null";
-	            }
+	    transients[key] = fn.call(entity);
+	    return transients[key];
+	  },
+	  parentWays: function parentWays(entity) {
+	    var parents = this._parentWays[entity.id];
+	    var result = [];
 
-	// Make an array to hold the partial results of stringifying this object value.
+	    if (parents) {
+	      parents.forEach(function (id) {
+	        result.push(this.entity(id));
+	      }, this);
+	    }
 
-	            gap += indent;
-	            partial = [];
+	    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 = [];
 
-	// Is the value an array?
+	    if (parents) {
+	      parents.forEach(function (id) {
+	        result.push(this.entity(id));
+	      }, this);
+	    }
 
-	            if (Object.prototype.toString.apply(value) === "[object Array]") {
+	    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 = [];
 
-	// The value is an array. Stringify every element. Use null as a placeholder
-	// for non-JSON values.
+	    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;
 
-	                length = value.length;
-	                for (i = 0; i < length; i += 1) {
-	                    partial[i] = str(i, value) || "null";
-	                }
+	    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
 
-	// Join all of the elements together, separated with commas, and wrap them in
-	// brackets.
+	      base.entities[entity.id] = entity;
 
-	                v = partial.length === 0
-	                    ? "[]"
-	                    : gap
-	                        ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]"
-	                        : "[" + partial.join(",") + "]";
-	                gap = mind;
-	                return v;
-	            }
+	      this._updateCalculated(undefined, entity, base.parentWays, base.parentRels); // Restore provisionally-deleted nodes that are discovered to have an extant parent
 
-	// 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 {
 
-	// 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);
-	                        }
-	                    }
-	                }
-	            }
+	      if (entity.type === 'way') {
+	        for (j = 0; j < entity.nodes.length; j++) {
+	          id = entity.nodes[j];
 
-	// Join all of the member texts together, separated with commas,
-	// and wrap them in braces.
+	          for (k = 1; k < stack.length; k++) {
+	            var ents = stack[k].entities;
 
-	            v = partial.length === 0
-	                ? "{}"
-	                : gap
-	                    ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}"
-	                    : "{" + partial.join(",") + "}";
-	            gap = mind;
-	            return v;
+	            if (ents.hasOwnProperty(id) && ents[id] === undefined) {
+	              delete ents[id];
+	            }
+	          }
 	        }
+	      }
 	    }
 
-	// If the JSON object does not yet have a stringify method, give it one.
-
-	    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 (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;
+	      }
 
-	// 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.
+	      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 i;
-	            gap = "";
-	            indent = "";
+	      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;
+	      }
 
-	// If the space parameter is a number, make an indent string containing that
-	// many spaces.
+	      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);
+	      }
 
-	            if (typeof space === "number") {
-	                for (i = 0; i < space; i += 1) {
-	                    indent += " ";
-	                }
+	      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);
 
-	// If the space parameter is a string, it will be used as the indent string.
+	      this.entities[entity.id] = entity;
+	    });
+	  },
+	  remove: function remove(entity) {
+	    return this.update(function () {
+	      this._updateCalculated(entity, undefined);
 
-	            } else if (typeof space === "string") {
-	                indent = space;
-	            }
+	      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;
 
-	// If there is a replacer, it must be a function or an array.
-	// Otherwise, throw an error.
+	    for (var i = 0; i < arguments.length; i++) {
+	      arguments[i].call(graph, graph);
+	    }
 
-	            rep = replacer;
-	            if (replacer && typeof replacer !== "function" &&
-	                    (typeof replacer !== "object" ||
-	                    typeof replacer.length !== "number")) {
-	                throw new Error("JSON.stringify");
-	            }
+	    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);
 
-	// Make a fake root object containing our value under the key of "".
-	// Return the result of stringifying the value.
+	    for (var i in entities) {
+	      this.entities[i] = entities[i];
 
-	            return str("", {"": value});
-	        };
+	      this._updateCalculated(base.entities[i], this.entities[i]);
 	    }
 
+	    return this;
+	  }
+	};
+
+	function osmTurn(turn) {
+	  if (!(this instanceof osmTurn)) {
+	    return new osmTurn(turn);
+	  }
 
-	// If the JSON object does not yet have a parse method, give it one.
+	  Object.assign(this, turn);
+	}
+	function osmIntersection(graph, startVertexId, maxDistance) {
+	  maxDistance = maxDistance || 30; // in meters
 
-	    if (typeof JSON.parse !== "function") {
-	        JSON.parse = function (text, reviver) {
+	  var vgraph = coreGraph(); // virtual graph
 
-	// 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 i, j, k;
 
-	            var j;
+	  function memberOfRestriction(entity) {
+	    return graph.parentRelations(entity).some(function (r) {
+	      return r.isRestriction();
+	    });
+	  }
 
-	            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);
-	            }
+	  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);
+	        }
+	      }
+	    }
 
-	// 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.
+	    if (hasWays) {
+	      vertices.push(vertex);
+	    }
+	  }
 
-	            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);
-	                });
-	            }
+	  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
 
-	// 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;
-	            }
+	  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
 
-	// If the text is not JSON parseable, then a SyntaxError is thrown.
+	  ways.forEach(function (w) {
+	    var way = vgraph.entity(w.id);
 
-	            throw new SyntaxError("JSON.parse");
-	        };
+	    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
 
-	var json2 = json2Plugin;
+	  osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities
 
-	function json2Plugin() {
-		
-		return {}
-	}
+	  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 plugins = [json2];
+	  function withMetadata(way, vertexIds) {
+	    var __oneWay = way.isOneWay(); // which affixes are key vertices?
 
-	var store_legacy = storeEngine.createStore(all, plugins);
 
-	// # 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) {
+	    var __first = vertexIds.indexOf(way.first()) !== -1;
 
-	    var oauth = {};
+	    var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?
 
-	    // 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'));
-	    };
 
-	    oauth.logout = function() {
-	        token('oauth_token', '');
-	        token('oauth_token_secret', '');
-	        token('oauth_request_token_secret', '');
-	        return oauth;
-	    };
+	    var __via = __first && __last;
 
-	    // 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)
-	            });
+	    var __from = __first && !__oneWay || __last;
 
-	            if (o.singlepage) {
-	                location.href = authorize_url;
-	            } else {
-	                popup.location = authorize_url;
-	            }
-	        }
+	    var __to = __first || __last && !__oneWay;
 
-	        // 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;
-	        };
+	    return way.update({
+	      __first: __first,
+	      __last: __last,
+	      __from: __from,
+	      __via: __via,
+	      __to: __to,
+	      __oneWay: __oneWay
+	    });
+	  }
 
-	        // ## 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);
-	        }
-	    };
+	  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
 
-	    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);
-	    };
+	  var keepGoing;
+	  var removeWayIds = [];
+	  var removeVertexIds = [];
 
-	    // # 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));
-	            }
+	  do {
+	    keepGoing = false;
+	    checkVertices = vertexIds.slice();
 
-	            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)))
-	            );
+	    for (i = 0; i < checkVertices.length; i++) {
+	      var vertexId = checkVertices[i];
+	      vertex = vgraph.hasEntity(vertexId);
 
-	            return ohauth_1.xhr(options.method, url, params, options.content, options.options, done);
+	      if (!vertex) {
+	        if (vertexIds.indexOf(vertexId) !== -1) {
+	          vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
 	        }
 
-	        function done(err, xhr) {
-	            if (err) { return callback(err); }
-	            else if (xhr.responseXML) { return callback(err, xhr.responseXML); }
-	            else { return callback(err, xhr.response); }
+	        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
 	        }
-	    };
+	      }
 
-	    // 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;
-	    };
+	      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;
 
-	    oauth.options = function(_) {
-	        if (!arguments.length) { return o; }
+	        if (aIsLeaf && !bIsLeaf) {
+	          leaf = a;
+	          survivor = b;
+	        } else if (!aIsLeaf && bIsLeaf) {
+	          leaf = b;
+	          survivor = a;
+	        }
 
-	        o = _;
-	        o.url = o.url || 'https://www.openstreetmap.org';
-	        o.landing = o.landing || 'land.html';
-	        o.singlepage = o.singlepage || false;
+	        if (leaf && survivor) {
+	          survivor = withMetadata(survivor, vertexIds); // update survivor way
 
-	        // Optional loading and loading-done functions for nice UI feedback.
-	        // by default, no-ops
-	        o.loading = o.loading || function() {};
-	        o.done = o.done || function() {};
+	          vgraph = vgraph.replace(survivor).remove(leaf); // update graph
 
-	        return oauth.preauth(o);
-	    };
+	          removeWayIds.push(leaf.id);
+	          keepGoing = true;
+	        }
+	      }
 
-	    // '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;
-	    }
+	      parents = vgraph.parentWays(vertex);
 
-	    // 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;
+	      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
+	        }
 
-	    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; }
-	        };
-	    }
+	        removeVertexIds.push(vertexId);
+	        keepGoing = true;
+	      }
 
-	    // 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'
-	        };
+	      if (parents.length < 1) {
+	        // vertex is no longer attached to anything
+	        vgraph = vgraph.remove(vertex);
+	      }
 	    }
+	  } while (keepGoing);
 
-	    // potentially pre-authorize
-	    oauth.options(o);
+	  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.
+	  //
 
-	    return oauth;
-	};
+	  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 JXON = new (function () {
-	  var
-	    sValueProp = 'keyValue', sAttributesProp = 'keyAttributes', sAttrPref = '@', /* you can customize these values */
-	    aCache = [], rIsNull = /^\s*$/, rIsBool = /^(?:true|false)$/i;
+	    var maxPathLength = maxViaWay * 2 + 3;
+	    var turns = [];
+	    step(start);
+	    return turns; // traverse the intersection graph and find all the valid paths
 
-	  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;
-	  }
+	    function step(entity, currPath, currRestrictions, matchedRestriction) {
+	      currPath = (currPath || []).slice(); // shallow copy
 
-	  function EmptyTree () { }
-	  EmptyTree.prototype.toString = function () { return 'null'; };
-	  EmptyTree.prototype.valueOf = function () { return null; };
+	      if (currPath.length >= maxPathLength) return;
+	      currPath.push(entity.id);
+	      currRestrictions = (currRestrictions || []).slice(); // shallow copy
 
-	  function objectify (vValue) {
-	    return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
-	  }
+	      var i, j;
 
-	  function createObjTree (oParentNode, nVerb, bFreeze, bNesteAttr) {
-	    var
-	      nLevelStart = aCache.length, bChildren = oParentNode.hasChildNodes(),
-	      bAttributes = oParentNode.hasAttributes(), bHighVerb = Boolean(nVerb & 2);
+	      if (entity.type === 'node') {
+	        var parents = vgraph.parentWays(entity);
+	        var nextWays = []; // which ways can we step into?
 
-	    var
-	      sProp, vContent, nLength = 0, sCollectedTxt = '',
-	      vResult = bHighVerb ? {} : /* put here the default value for empty nodes: */ true;
+	        for (i = 0; i < parents.length; i++) {
+	          var way = parents[i]; // if next way is a oneway incoming to this vertex, skip
 
-	    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) */
-	      }
-	    }
+	          if (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip
 
-	    var nLevelEnd = aCache.length, vBuiltVal = parseText(sCollectedTxt);
+	          if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)
 
-	    if (!bHighVerb && (bChildren || bAttributes)) { vResult = nVerb === 0 ? objectify(vBuiltVal) : {}; }
+	          var restrict = null;
 
-	    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++;
-	      }
-	    }
+	          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?
 
-	    if (bAttributes) {
-	      var
-	        nAttrLen = oParentNode.attributes.length,
-	        sAPrefix = bNesteAttr ? '' : sAttrPref, oAttrParent = bNesteAttr ? {} : vResult;
+	            var matchesFrom = f.id === fromWayId;
+	            var matchesViaTo = false;
+	            var isAlongOnlyPath = false;
 
-	      for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
-	        oAttrib = oParentNode.attributes.item(nAttrib);
-	        oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
-	      }
+	            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 = [];
 
-	      if (bNesteAttr) {
-	        if (bFreeze) { Object.freeze(oAttrParent); }
-	        vResult[sAttributesProp] = oAttrParent;
-	        nLength -= nAttrLen - 1;
-	      }
-	    }
+	                for (k = 2; k < currPath.length; k += 2) {
+	                  // k = 2 skips FROM
+	                  pathVias.push(currPath[k]); // (path goes way-node-way...)
+	                }
 
-	    if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
-	      vResult[sValueProp] = vBuiltVal;
-	    } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
-	      vResult = vBuiltVal;
-	    }
+	                var restrictionVias = [];
 
-	    if (bFreeze && (bHighVerb || nLength > 0)) { Object.freeze(vResult); }
+	                for (k = 0; k < v.length; k++) {
+	                  if (v[k].type === 'way') {
+	                    restrictionVias.push(v[k].id);
+	                  }
+	                }
 
-	    aCache.length = nLevelStart;
+	                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;
+	                }
+	              }
+	            }
 
-	    return vResult;
-	  }
+	            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)
 
-	  function loadObjTree (oXMLDoc, oParentEl, oParentObj) {
-	    var vValue, oChild;
 
-	    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 (restrict && restrict.direct) break;
+	          }
 
-	    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);
+	          nextWays.push({
+	            way: way,
+	            restrict: restrict
+	          });
 	        }
+
+	        nextWays.forEach(function (nextWay) {
+	          step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
+	        });
 	      } 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);
-	     }
-	   }
-	  }
+	        // 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;
+	              }
+	            }
+	          }
 
-	  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);    
-	  };
+	          var turn = pathToTurn(turnPath);
 
-	  this.unbuild = function (oObjTree) {    
-	    var oNewDoc = document.implementation.createDocument('', '', null);
-	    loadObjTree(oNewDoc, oNewDoc, oObjTree);
-	    return oNewDoc;
-	  };
+	          if (turn) {
+	            if (matchedRestriction) {
+	              turn.restrictionID = matchedRestriction.id;
+	              turn.no = matchedRestriction.no;
+	              turn.only = matchedRestriction.only;
+	              turn.direct = matchedRestriction.direct;
+	            }
 
-	  this.stringify = function (oObjTree) {
-	    return (new XMLSerializer()).serializeToString(JXON.unbuild(oObjTree));
-	  };
-	})();
+	            turns.push(osmTurn(turn));
+	          }
 
-	// var myObject = JXON.build(doc);
-	// we got our javascript object! try: alert(JSON.stringify(myObject));
+	          if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
+	        }
 
-	// var newDoc = JXON.unbuild(myObject);
-	// we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc));
+	        if (matchedRestriction && matchedRestriction.end) return; // don't advance any further
+	        // which nodes can we step into?
 
-	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
-	});
+	        var n1 = vgraph.entity(entity.first());
+	        var n2 = vgraph.entity(entity.last());
+	        var dist = geoSphericalDistance(n1.loc, n2.loc);
+	        var nextNodes = [];
 
-	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 = {};
+	        if (currPath.length > 1) {
+	          if (dist > maxDistance) return; // the next node is too far
 
-	var _deferred = new Set();
-	var _connectionID = 1;
-	var _tileZoom$3 = 16;
-	var _noteZoom = 12;
-	var _rateLimitError;
-	var _userChangesets;
-	var _userDetails;
-	var _off;
+	          if (!entity.__via) return; // this way is a leaf / can't be a via
+	        }
 
-	// set a default but also load this from the API status
-	var _maxWayNodes = 2000;
+	        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
+	        }
 
-	function authLoading() {
-	    dispatch$6.call('authLoading');
-	}
+	        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');
 
-	function authDone() {
-	    dispatch$6.call('authDone');
-	}
+	            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
+	        }
+	      }
 
-	function abortRequest$5(controllerOrXHR) {
-	    if (controllerOrXHR) {
-	        controllerOrXHR.abort();
-	    }
-	}
+	      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];
+	      }
+	    }
+	  };
 
-	function hasInflightRequests(cache) {
-	    return Object.keys(cache.inflight).length;
+	  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;
+	  }
 
-	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; }
+	  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
 
-	        abortRequest$5(cache.inflight[k]);
-	        delete cache.inflight[k];
-	    });
+	  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);
+	  }
 
-	function getLoc(attrs) {
-	    var lon = attrs.lon && attrs.lon.value;
-	    var lat = attrs.lat && attrs.lat.value;
-	    return [parseFloat(lon), parseFloat(lat)];
-	}
+	  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;
 
-	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;
+	    while (polygons.length) {
+	      extractUncontained(polygons);
+	      polygons = polygons.filter(isContained);
+	      contained = contained.filter(isContained).map(filterContained);
 	    }
-	    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];
+	    function isContained(d, i) {
+	      return contained[i].some(function (val) {
+	        return val;
+	      });
 	    }
-	    return nodes;
-	}
 
-	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 filterContained(d) {
+	      return d.filter(isContained);
 	    }
 
-	    return tags;
-	}
+	    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
 
 
-	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;
-	}
+	    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';
+	      }
 
-	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;
-	}
+	      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 getVisible(attrs) {
-	    return (!attrs.visible || attrs.visible.value !== 'false');
-	}
+	  action.disabled = function (graph) {
+	    var entities = groupEntities(graph);
 
+	    if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
+	      return 'not_eligible';
+	    }
 
-	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;
-	                    }
-	                }
-	            }
+	    if (!entities.multipolygon.every(function (r) {
+	      return r.isComplete(graph);
+	    })) {
+	      return 'incomplete_relation';
+	    }
 
-	            if (parsedComment) {
-	                parsedComments.push(parsedComment);
-	            }
+	    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 parsedComments;
+	  };
+
+	  return action;
 	}
 
+	var UNSUPPORTED_Y$3 = regexpStickyHelpers.UNSUPPORTED_Y;
 
-	function encodeNoteRtree(note) {
-	    return {
-	        minX: note.loc[0],
-	        minY: note.loc[1],
-	        maxX: note.loc[0],
-	        maxY: note.loc[1],
-	        data: note
-	    };
+	// `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 fastDeepEqual = function equal(a, b) {
+	  if (a === b) return true;
 
-	var jsonparsers = {
+	  if (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
+	    if (a.constructor !== b.constructor) return false;
+	    var length, i, keys;
 
-	    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
-	        });
-	    },
+	    if (Array.isArray(a)) {
+	      length = a.length;
+	      if (length != b.length) return false;
 
-	    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)
-	        });
-	    },
+	      for (i = length; i-- !== 0;) {
+	        if (!equal(a[i], b[i])) return false;
+	      }
 
-	    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)
-	        });
+	      return true;
 	    }
-	};
 
-	function parseJSON(payload, callback, options) {
-	    options = Object.assign({ skipSeen: true }, options);
-	    if (!payload)  {
-	        return callback({ message: 'No JSON', status: -1 });
-	    }
+	    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;
 
-	    var json = payload;
-	    if (typeof json !== 'object')
-	       { json = JSON.parse(payload); }
+	    for (i = length; i-- !== 0;) {
+	      if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
+	    }
 
-	    if (!json.elements)
-	        { return callback({ message: 'No JSON', status: -1 }); }
+	    for (i = length; i-- !== 0;) {
+	      var key = keys[i];
+	      if (!equal(a[key], b[key])) return false;
+	    }
 
-	    var children = json.elements;
+	    return true;
+	  } // true if both NaN, false otherwise
 
-	    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);
-	    });
 
-	    _deferred.add(handle);
+	  return a !== a && b !== b;
+	};
 
-	    function parseChild(child) {
-	        var parser = jsonparsers[child.type];
-	        if (!parser) { return null; }
+	// 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
 
-	        var uid;
+	function LCS(buffer1, buffer2) {
+	  var equivalenceClasses = {};
 
-	        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;
-	        }
+	  for (var j = 0; j < buffer2.length; j++) {
+	    var item = buffer2[j];
 
-	        return parser(child, uid);
+	    if (equivalenceClasses[item]) {
+	      equivalenceClasses[item].push(j);
+	    } else {
+	      equivalenceClasses[item] = [j];
 	    }
-	}
+	  }
 
-	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)
-	        });
-	    },
+	  var NULLRESULT = {
+	    buffer1index: -1,
+	    buffer2index: -1,
+	    chain: null
+	  };
+	  var candidates = [NULLRESULT];
 
-	    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),
-	        });
-	    },
+	  for (var i = 0; i < buffer1.length; i++) {
+	    var _item = buffer1[i];
+	    var buffer2indices = equivalenceClasses[_item] || [];
+	    var r = 0;
+	    var c = candidates[0];
 
-	    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)
-	        });
-	    },
+	    for (var jx = 0; jx < buffer2indices.length; jx++) {
+	      var _j = buffer2indices[jx];
+	      var s = void 0;
 
-	    note: function parseNote(obj, uid) {
-	        var attrs = obj.attributes;
-	        var childNodes = obj.childNodes;
-	        var props = {};
+	      for (s = r; s < candidates.length; s++) {
+	        if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
+	          break;
+	        }
+	      }
 
-	        props.id = uid;
-	        props.loc = getLoc(attrs);
+	      if (s < candidates.length) {
+	        var newCandidate = {
+	          buffer1index: i,
+	          buffer2index: _j,
+	          chain: candidates[s]
+	        };
 
-	        // 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 (r === candidates.length) {
+	          candidates.push(c);
+	        } else {
+	          candidates[r] = c;
 	        }
 
-	        var note = new osmNote(props);
-	        var item = encodeNoteRtree(note);
-	        _noteCache.note[note.id] = note;
-	        _noteCache.rtree.insert(item);
+	        r = s + 1;
+	        c = newCandidate;
 
-	        return note;
-	    },
+	        if (r === candidates.length) {
+	          break; // no point in examining further (j)s
+	        }
+	      }
+	    }
 
-	    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'
-	        };
+	    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].
 
-	        var img = obj.getElementsByTagName('img');
-	        if (img && img[0] && img[0].getAttribute('href')) {
-	            user.image_url = img[0].getAttribute('href');
-	        }
 
-	        var changesets = obj.getElementsByTagName('changesets');
-	        if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
-	            user.changesets_count = changesets[0].getAttribute('count');
-	        }
+	  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.
 
-	        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');
-	            }
-	        }
 
-	        _userCache.user[uid] = user;
-	        delete _userCache.toLoad[uid];
-	        return user;
-	    }
-	};
+	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;
 
-	function parseXML(xml, callback, options) {
-	    options = Object.assign({ skipSeen: true }, options);
-	    if (!xml || !xml.childNodes) {
-	        return callback({ message: 'No XML', status: -1 });
+	    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)
+	//
 
-	    var root = xml.childNodes[0];
-	    var children = root.childNodes;
 
-	    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);
-	    });
+	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 = [];
 
-	    _deferred.add(handle);
+	  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])
 
+	    });
+	  }
 
-	    function parseChild(child) {
-	        var parser = parsers[child.nodeName];
-	        if (!parser) { return null; }
+	  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;
 
-	        var uid;
-	        if (child.nodeName === 'user') {
-	            uid = child.attributes.id.value;
-	            if (options.skipSeen && _userCache.user[uid]) {
-	                delete _userCache.toLoad[uid];
-	                return null;
-	            }
+	  function advanceTo(endOffset) {
+	    if (endOffset > currOffset) {
+	      results.push({
+	        stable: true,
+	        buffer: 'o',
+	        bufferStart: currOffset,
+	        bufferLength: endOffset - currOffset,
+	        bufferContent: o.slice(currOffset, endOffset)
+	      });
+	      currOffset = endOffset;
+	    }
+	  }
 
-	        } else if (child.nodeName === 'note') {
-	            uid = child.getElementsByTagName('id')[0].textContent;
+	  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
 
-	        } 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;
-	            }
-	        }
+	    while (hunks.length) {
+	      var nextHunk = hunks[0];
+	      var nextHunkStart = nextHunk.oStart;
+	      if (nextHunkStart > regionEnd) break; // no overlap
 
-	        return parser(child, uid);
+	      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]
+	      };
 
-	// 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; });
+	      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]);
+	      }
 
-	    if (replace) {
-	        _noteCache.rtree.insert(item);
+	      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;
+	  }
 
-	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 callback.call(thisArg, err);
+	  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`
 
-	        } else if (thisArg.getConnectionId() !== cid) {
-	            return callback.call(thisArg, { message: 'Connection Switched', status: -1 });
 
-	        } else {
-	            return callback.call(thisArg, err, result);
-	        }
-	    };
-	}
+	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
+	      });
+	    }
 
-	var serviceOsm = {
+	    okBuffer = [];
+	  }
 
-	    init: function() {
-	        utilRebind(this, dispatch$6, 'on');
-	    },
+	  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;
+	    }
 
-	    reset: function() {
-	        Array.from(_deferred).forEach(function(handle) {
-	            window.cancelIdleCallback(handle);
-	            _deferred.delete(handle);
-	        });
+	    return true;
+	  }
 
-	        _connectionID++;
-	        _userChangesets = undefined;
-	        _userDetails = undefined;
-	        _rateLimitError = undefined;
+	  regions.forEach(function (region) {
+	    if (region.stable) {
+	      var _okBuffer;
 
-	        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); }
+	      (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
+	    } else {
+	      if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
+	        var _okBuffer2;
 
-	        _tileCache = { toLoad: {}, loaded: {}, inflight: {}, seen: {}, rtree: new RBush() };
-	        _noteCache = { toLoad: {}, loaded: {}, inflight: {}, inflightPost: {}, note: {}, closed: {}, rtree: new RBush() };
-	        _userCache = { toLoad: {}, user: {} };
-	        _cachedApiStatus = undefined;
-	        _changeset = {};
+	        (_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;
+	}
 
-	        return this;
-	    },
+	function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
+	  discardTags = discardTags || {};
+	  var _option = 'safe'; // 'safe', 'force_local', 'force_remote'
 
+	  var _conflicts = [];
 
-	    getConnectionId: function() {
-	        return _connectionID;
-	    },
+	  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;
+	    }
 
-	    changesetURL: function(changesetID) {
-	        return urlroot + '/changeset/' + changesetID;
-	    },
+	    if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
+	      return target;
+	    }
 
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        loc: remote.loc
+	      });
+	    }
 
-	    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);
-	    },
+	    _conflicts.push(_t('merge_remote_changes.conflict.location', {
+	      user: user(remote.user)
+	    }));
 
+	    return target;
+	  }
 
-	    entityURL: function(entity) {
-	        return urlroot + '/' + entity.type + '/' + entity.osmId();
-	    },
+	  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
+	      });
+	    }
 
-	    historyURL: function(entity) {
-	        return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
-	    },
+	    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];
 
-	    userURL: function(username) {
-	        return urlroot + '/user/' + username;
-	    },
+	      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;
+	        }
+	      }
+	    }
 
-	    noteURL: function(note) {
-	        return urlroot + '/note/' + note.id;
-	    },
+	    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;
+	    }
 
-	    noteReportURL: function(note) {
-	        return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
-	    },
+	    var ccount = _conflicts.length;
 
+	    for (var i = 0; i < children.length; i++) {
+	      var id = children[i];
+	      var node = graph.hasEntity(id); // remove unused childNodes..
 
-	    // 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;
+	      if (targetWay.nodes.indexOf(id) === -1) {
+	        if (node && !isUsed(node, targetWay)) {
+	          updates.removeIds.push(id);
+	        }
 
-	        function done(err, payload) {
-	            if (that.getConnectionId() !== cid) {
-	                if (callback) { callback({ message: 'Connection Switched', status: -1 }); }
-	                return;
-	            }
+	        continue;
+	      } // restore used childNodes..
 
-	            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);
+	      var local = localGraph.hasEntity(id);
+	      var remote = remoteGraph.hasEntity(id);
+	      var target;
 
-	            // 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 (_option === 'force_remote' && remote && remote.visible) {
+	        updates.replacements.push(remote);
+	      } else if (_option === 'force_local' && local) {
+	        target = osmEntity(local);
 
-	                if (callback) {
-	                    if (err) {
-	                        return callback(err);
-	                    } else {
-	                        if (path.indexOf('.json') !== -1) {
-	                            return parseJSON(payload, callback, options);
-	                        } else {
-	                            return parseXML(payload, callback, options);
-	                        }
-	                    }
-	                }
-	            }
+	        if (remote) {
+	          target = target.update({
+	            version: remote.version
+	          });
 	        }
 
-	        if (this.authenticated()) {
-	            return oauth.xhr({ method: 'GET', path: path }, done);
+	        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 {
-	            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;
+	          _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
+	            user: user(remote.user)
+	          }));
 	        }
-	    },
 
+	        if (_conflicts.length !== ccount) break;
+	        updates.replacements.push(target);
+	      }
+	    }
 
-	    // 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 };
+	    return targetWay;
+	  }
 
-	        this.loadFromAPI(
-	            '/api/0.6/' + type + '/' + osmID + (type !== 'node' ? '/full' : '') + '.json',
-	            function(err, entities) {
-	                if (callback) { callback(err, { data: entities }); }
-	            },
-	            options
-	        );
-	    },
+	  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);
+	    }
 
-	    // 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 graph;
+	  }
 
-	        this.loadFromAPI(
-	            '/api/0.6/' + type + '/' + osmID + '/' + version + '.json',
-	            function(err, entities) {
-	                if (callback) { callback(err, { data: entities }); }
-	            },
-	            options
-	        );
-	    },
+	  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
+	      });
+	    }
 
-	    // 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
-	                );
-	            });
-	        });
-	    },
+	    _conflicts.push(_t('merge_remote_changes.conflict.memberlist', {
+	      user: user(remote.user)
+	    }));
 
+	    return target;
+	  }
 
-	    // 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;
+	  function mergeTags(base, remote, target) {
+	    if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
+	      return target;
+	    }
 
-	        if (_changeset.inflight) {
-	            return callback({ message: 'Changeset already inflight', status: -2 }, changeset);
+	    if (_option === 'force_remote') {
+	      return target.update({
+	        tags: remote.tags
+	      });
+	    }
 
-	        } else if (_changeset.open) {   // reuse existing open changeset..
-	            return createdChangeset.call(this, null, _changeset.open);
+	    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];
+	          }
 
-	        } 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)
-	            );
+	          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`
+	  //
 
-	        function createdChangeset(err, changesetID) {
-	            _changeset.inflight = null;
-	            if (err) { return callback(err, changeset); }
 
-	            _changeset.open = changesetID;
-	            changeset = changeset.update({ id: changesetID });
+	  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
 
-	            // 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 (!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)
+	        }));
 
-	    // 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 = [];
+	        return graph; // do nothing
+	      }
+	    } // merge
 
-	        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
-	        }
+	    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);
+	    }
 
-	        utilArrayChunk(toLoad, 150).forEach(function(arr) {
-	            oauth.xhr(
-	                { method: 'GET', path: '/api/0.6/users?users=' + arr.join() },
-	                wrapcb(this, done, _connectionID)
-	            );
-	        }.bind(this));
+	    target = mergeTags(base, remote, target);
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	    if (!_conflicts.length) {
+	      graph = updateChildren(updates, graph).replace(target);
+	    }
 
-	            var options = { skipSeen: true };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results);
-	                }
-	            }, options);
-	        }
-	    },
+	    return graph;
+	  };
 
+	  action.withOption = function (opt) {
+	    _option = opt;
+	    return action;
+	  };
 
-	    // 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]);
-	        }
+	  action.conflicts = function () {
+	    return _conflicts;
+	  };
 
-	        oauth.xhr(
-	            { method: 'GET', path: '/api/0.6/user/' + uid },
-	            wrapcb(this, done, _connectionID)
-	        );
+	  return action;
+	}
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	// https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
 
-	            var options = { skipSeen: true };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results[0]);
-	                }
-	            }, options);
-	        }
-	    },
+	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..
 
-	    // 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);
-	        }
+	      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..
 
-	        oauth.xhr(
-	            { method: 'GET', path: '/api/0.6/user/details' },
-	            wrapcb(this, done, _connectionID)
-	        );
+	      var parentsMoving = parents.every(function (way) {
+	        return cache.moving[way.id];
+	      });
+	      if (!parentsMoving) delete cache.moving[nodeID];
+	      return parentsMoving;
+	    }
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	    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;
 
-	            var options = { skipSeen: false };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    _userDetails = results[0];
-	                    return callback(undefined, _userDetails);
-	                }
-	            }, options);
+	        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;
+	          }));
 	        }
-	    },
-
+	      }
+	    }
 
-	    // 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);
-	        }
+	    function cacheIntersections(ids) {
+	      function isEndpoint(way, id) {
+	        return !way.isClosed() && !!way.affix(id);
+	      }
 
-	        this.userDetails(
-	            wrapcb(this, gotDetails, _connectionID)
-	        );
+	      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));
 
-	        function gotDetails(err, user) {
-	            if (err) { return callback(err); }
+	        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;
 
-	            oauth.xhr(
-	                { method: 'GET', path: '/api/0.6/changesets?user=' + user.id },
-	                wrapcb(this, done, _connectionID)
-	            );
-	        }
+	          for (var k = 0; k < parents.length; k++) {
+	            var way = parents[k];
 
-	        function done(err, xml) {
-	            if (err) { return callback(err); }
+	            if (!cache.moving[way.id]) {
+	              unmoved = way;
+	              break;
+	            }
+	          }
 
-	            _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 !== '';
-	            });
+	          if (!unmoved) continue; // exclude ways that are overly connected..
 
-	            return callback(undefined, _userChangesets);
+	          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)
+	          });
 	        }
-	    },
-
+	      }
+	    }
 
-	    // 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 (!cache) {
+	      cache = {};
+	    }
 
-	        function done(err, xml) {
-	            if (err) {
-	                // the status is null if no response could be retrieved
-	                return callback(err, null);
-	            }
+	    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
+	  //
+	  //
 
-	            // 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 (_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; }
+	  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 apiStatus = xml.getElementsByTagName('status');
-	                var val = apiStatus[0].getAttribute('api');
-	                return callback(undefined, val);
-	            }
-	        }
-	    },
+	    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;
+	    }
 
-	    // 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();
-	    },
+	    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];
 
-	    // Returns the maximum number of nodes a single way can have
-	    maxWayNodes: function() {
-	        return _maxWayNodes;
-	    },
+	    if (!orig) {
+	      orig = osmNode();
+	      cache.replacedVertex[key] = orig;
+	      cache.startLoc[orig.id] = cache.startLoc[nodeId];
+	    }
 
+	    var start, end;
 
-	    // Load data (entities) from the API in tiles
-	    // GET /api/0.6/map?bbox=
-	    loadTiles: function(projection, callback) {
-	        if (_off) { return; }
+	    if (delta) {
+	      start = projection(cache.startLoc[nodeId]);
+	      end = projection.invert(geoVecAdd(start, delta));
+	    } else {
+	      end = cache.startLoc[nodeId];
+	    }
 
-	        // determine the needed tiles to cover the view
-	        var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection);
+	    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..
 
-	        // 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
-	        }
+	    if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?
 
-	        // issue new requests..
-	        tiles.forEach(function(tile) {
-	            this.loadTile(tile, callback);
-	        }, this);
-	    },
+	    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.
 
-	    // 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; }
 
-	        if (!hasInflightRequests(_tileCache)) {
-	            dispatch$6.call('loading');   // start the spinner
-	        }
+	  function removeDuplicateVertices(wayId, graph) {
+	    var way = graph.entity(wayId);
+	    var epsilon = 1e-6;
+	    var prev, curr;
 
-	        var path = '/api/0.6/map.json?bbox=';
-	        var options = { skipSeen: true };
+	    function isInteresting(node, graph) {
+	      return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+	    }
 
-	        _tileCache.inflight[tile.id] = this.loadFromAPI(
-	            path + tile.extent.toParam(),
-	            tileCallback,
-	            options
-	        );
+	    for (var i = 0; i < way.nodes.length; i++) {
+	      curr = graph.entity(way.nodes[i]);
 
-	        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 (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;
+	    }
 
-	    isDataLoaded: function(loc) {
-	        var bbox = { minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1] };
-	        return _tileCache.rtree.collides(bbox);
-	    },
+	    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
+	  //
 
 
-	    // 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; }
+	  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 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);
+	    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;
+	    }
 
-	        tiles.forEach(function(tile) {
-	            if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) { return; }
+	    graph = graph.replace(vertex.move(loc)); // if zorro happened, reorder nodes..
 
-	            _tileCache.toLoad[tile.id] = true;
-	            this.loadTile(tile, callback);
-	        }, this);
-	    },
+	    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);
+	    }
 
-	    // 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; }
+	    return graph;
+	  }
 
-	        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
-	            );
-	        });
-	    },
+	  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..
 
-	    // 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);
-	        }
 
-	        if (!note.loc[0] || !note.loc[1] || !note.newComment) { return; } // location & description required
+	  function limitDelta(graph) {
+	    function moveNode(loc) {
+	      return geoVecAdd(projection(loc), _delta);
+	    }
 
-	        var comment = note.newComment;
-	        if (note.newCategory && note.newCategory !== 'None') { comment += ' #' + note.newCategory; }
+	    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..
 
-	        var path = '/api/0.6/notes?' + utilQsString({ lon: note.loc[0], lat: note.loc[1], text: comment });
+	      if (obj.movedIsEP && obj.unmovedIsEP) continue; // Don't limit movement if this vertex is not an endpoint anyway..
 
-	        _noteCache.inflightPost[note.id] = oauth.xhr(
-	            { method: 'POST', path: path },
-	            wrapcb(this, done, _connectionID)
-	        );
+	      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);
+	      }
+	    }
+	  }
 
-	        function done(err, xml) {
-	            delete _noteCache.inflightPost[note.id];
-	            if (err) { return callback(err); }
+	  var action = function action(graph) {
+	    if (_delta[0] === 0 && _delta[1] === 0) return graph;
+	    setupCache(graph);
 
-	            // we get the updated note back, remove from caches and reparse..
-	            this.removeNote(note);
+	    if (cache.intersections.length) {
+	      limitDelta(graph);
+	    }
 
-	            var options = { skipSeen: false };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results[0]);
-	                }
-	            }, options);
-	        }
-	    },
+	    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);
+	    }
 
-	    // 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);
-	        }
+	    return graph;
+	  };
 
-	        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
-	        }
+	  action.delta = function () {
+	    return _delta;
+	  };
 
-	        var path = '/api/0.6/notes/' + note.id + '/' + action;
-	        if (note.newComment) {
-	            path += '?' + utilQsString({ text: note.newComment });
-	        }
+	  return action;
+	}
 
-	        _noteCache.inflightPost[note.id] = oauth.xhr(
-	            { method: 'POST', path: path },
-	            wrapcb(this, done, _connectionID)
-	        );
+	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 done(err, xml) {
-	            delete _noteCache.inflightPost[note.id];
-	            if (err) { return callback(err); }
+	  action.transitionable = true;
+	  return action;
+	}
 
-	            // we get the updated note back, remove from caches and reparse..
-	            this.removeNote(note);
+	function actionNoop() {
+	  return function (graph) {
+	    return graph;
+	  };
+	}
 
-	            // 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];
-	            }
+	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 options = { skipSeen: false };
-	            return parseXML(xml, function(err, results) {
-	                if (err) {
-	                    return callback(err);
-	                } else {
-	                    return callback(undefined, results[0]);
-	                }
-	            }, options);
-	        }
-	    },
+	  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
 
-	    switch: function(options) {
-	        urlroot = options.urlroot;
+	    if (way.tags.nonsquare) {
+	      var tags = Object.assign({}, way.tags); // since we're squaring, remove indication that this is physically unsquare
 
-	        oauth.options(Object.assign({
-	            url: urlroot,
-	            loading: authLoading,
-	            done: authDone
-	        }, options));
+	      delete tags.nonsquare;
+	      way = way.update({
+	        tags: tags
+	      });
+	    }
 
-	        this.reset();
-	        this.userChangesets(function() {});  // eagerly load user details/changesets
-	        dispatch$6.call('change');
-	        return this;
-	    },
+	    graph = graph.replace(way);
+	    var isClosed = way.isClosed();
+	    var nodes = graph.childNodes(way).slice(); // shallow copy
 
+	    if (isClosed) nodes.pop();
 
-	    toggle: function(val) {
-	        _off = !val;
-	        return this;
-	    },
+	    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
 
 
-	    isChangesetInflight: function() {
-	        return !!_changeset.inflight;
-	    },
+	    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;
 
-	    // 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;
+	        if (score < epsilon) {
+	          break;
 	        }
+	      }
 
-	        if (!arguments.length) {
-	            return {
-	                tile: cloneCache(_tileCache),
-	                note: cloneCache(_noteCache),
-	                user: cloneCache(_userCache)
-	            };
+	      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));
 	        }
 
-	        // access caches directly for testing (e.g., loading notes rtree)
-	        if (obj === 'get') {
-	            return {
-	                tile: _tileCache,
-	                note: _noteCache,
-	                user: _userCache
-	            };
+	        if (dotp > upperThreshold) {
+	          straights.push(point);
+	        } else {
+	          simplified.push(point);
 	        }
+	      } // Orthogonalize the simplified shape
+
+
+	      var bestPoints = clonePoints(simplified);
+	      var originalPoints = clonePoints(simplified);
+	      score = Infinity;
 
-	        if (obj.tile) {
-	            _tileCache = obj.tile;
-	            _tileCache.inflight = {};
+	      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]);
 	        }
-	        if (obj.note) {
-	            _noteCache = obj.note;
-	            _noteCache.inflight = {};
-	            _noteCache.inflightPost = {};
+
+	        var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
+
+	        if (newScore < score) {
+	          bestPoints = clonePoints(simplified);
+	          score = newScore;
 	        }
-	        if (obj.user) {
-	            _userCache = obj.user;
+
+	        if (score < epsilon) {
+	          break;
 	        }
+	      }
 
-	        return this;
-	    },
+	      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];
 
-	    logout: function() {
-	        _userChangesets = undefined;
-	        _userDetails = undefined;
-	        oauth.logout();
-	        dispatch$6.call('change');
-	        return this;
-	    },
+	        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
 
 
-	    authenticated: function() {
-	        return oauth.authenticated();
-	    },
+	      for (i = 0; i < straights.length; i++) {
+	        point = straights[i];
+	        if (nodeCount[point.id] > 1) continue; // skip self-intersections
 
+	        node = graph.entity(point.id);
 
-	    authenticate: function(callback) {
-	        var that = this;
-	        var cid = _connectionID;
-	        _userChangesets = undefined;
-	        _userDetails = undefined;
+	        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);
 
-	        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 (choice) {
+	            loc = projection.invert(choice.target);
+	            graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+	          }
 	        }
+	      }
+	    }
 
-	        return oauth.authenticate(done);
-	    },
+	    return graph;
 
+	    function clonePoints(array) {
+	      return array.map(function (p) {
+	        return {
+	          id: p.id,
+	          coord: [p.coord[0], p.coord[1]]
+	        };
+	      });
+	    }
 
-	    imageryBlacklists: function() {
-	        return _blacklists;
-	    },
+	    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
 
-	    tileZoom: function(val) {
-	        if (!arguments.length) { return _tileZoom$3; }
-	        _tileZoom$3 = val;
-	        return this;
-	    },
 
+	  function nodeSubset(nodes, vertexID, isClosed) {
+	    var first = isClosed ? 0 : 1;
+	    var last = isClosed ? nodes.length : nodes.length - 1;
 
-	    // 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();
+	    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 _noteCache.rtree.search(bbox)
-	            .map(function(d) { return d.data; });
-	    },
+	    return [];
+	  }
 
+	  action.disabled = function (graph) {
+	    var way = graph.entity(wayID);
+	    way = way.removeNode(''); // sanity check - remove any consecutive duplicates
 
-	    // get a single note from the cache
-	    getNote: function(id) {
-	        return _noteCache.note[id];
-	    },
+	    graph = graph.replace(way);
+	    var isClosed = way.isClosed();
+	    var nodes = graph.childNodes(way).slice(); // shallow copy
 
+	    if (isClosed) nodes.pop();
+	    var allowStraightAngles = false;
 
-	    // remove a single note from the cache
-	    removeNote: function(note) {
-	        if (!(note instanceof osmNote) || !note.id) { return; }
+	    if (vertexID !== undefined) {
+	      allowStraightAngles = true;
+	      nodes = nodeSubset(nodes, vertexID, isClosed);
+	      if (nodes.length !== 3) return 'end_vertex';
+	    }
 
-	        delete _noteCache.note[note.id];
-	        updateRtree$3(encodeNoteRtree(note), false);  // false = remove
-	    },
+	    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;
+	    }
+	  };
 
-	    // replace a single note in the cache
-	    replaceNote: function(note) {
-	        if (!(note instanceof osmNote) || !note.id) { return; }
+	  action.transitionable = true;
+	  return action;
+	}
 
-	        _noteCache.note[note.id] = note;
-	        updateRtree$3(encodeNoteRtree(note), true);  // true = replace
-	        return note;
-	    },
+	//
+	// `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'
+	    });
 
-	    // 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 (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
+	    }));
+	  };
+	}
 
-	var apibase$3 = 'https://wiki.openstreetmap.org/w/api.php';
-	var _inflight$1 = {};
-	var _wikibaseCache = {};
-	var _localeIDs = { en: false };
+	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);
 
-	var debouncedRequest = debounce(request, 500, { leading: false });
+	        if (parent.isDegenerate()) {
+	          graph = actionDeleteRelation(parent.id)(graph);
+	        }
+	      });
+	    }
 
-	function request(url, callback) {
-	    if (_inflight$1[url]) { return; }
-	    var controller = new AbortController();
-	    _inflight$1[url] = controller;
+	    return graph.revert(id);
+	  };
 
-	    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); }
-	        });
+	  return action;
 	}
 
+	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)));
+	      });
+	    });
+	  };
 
-	/**
-	 * 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 : '';
+	  return action;
 	}
 
+	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)));
+	      });
+	    });
+	  };
+	}
 
-	var serviceOsmWikibase = {
+	/* Align nodes along their common axis */
 
-	    init: function() {
-	        _inflight$1 = {};
-	        _wikibaseCache = {};
-	        _localeIDs = {};
-	    },
+	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
 
 
-	    reset: function() {
-	        Object.values(_inflight$1).forEach(function(controller) { controller.abort(); });
-	        _inflight$1 = {};
-	    },
+	  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);
 
-	    /**
-	     * 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 (locale && stmt.qualifiers && stmt.qualifiers.P26 &&
-	                stmt.qualifiers.P26[0].datavalue.value.id === locale
-	            ) {
-	                localePick = stmt;
-	            }
-	        });
+	    if (isLong) {
+	      return [p1, q1];
+	    }
 
-	        var result = localePick || preferredPick;
-	        if (result) {
-	            var datavalue = result.mainsnak.datavalue;
-	            return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
-	        } else {
-	            return undefined;
-	        }
-	    },
+	    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
 
-	    /**
-	     * 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;
-	        }, {});
-	    },
+	    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;
+	  };
 
-	    toSitelink: function(key, value) {
-	        var result = value ? ('Tag:' + key + '=' + value) : 'Key:' + key;
-	        return result.replace(/_/g, ' ').trim();
-	    },
+	  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);
 
-	    //
-	    // 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 (!isNaN(dist) && dist > maxDistance) {
+	        maxDistance = dist;
+	      }
+	    }
 
-	        if (keySitelink) {
-	            if (_wikibaseCache[keySitelink]) {
-	                result.key = _wikibaseCache[keySitelink];
-	            } else {
-	                titles.push(keySitelink);
-	            }
-	        }
+	    if (maxDistance < 0.0001) {
+	      return 'straight_enough';
+	    }
+	  };
 
-	        if (tagSitelink) {
-	            if (_wikibaseCache[tagSitelink]) {
-	                result.tag = _wikibaseCache[tagSitelink];
-	            } else {
-	                titles.push(tagSitelink);
-	            }
-	        }
+	  action.transitionable = true;
+	  return action;
+	}
 
-	        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,
-	        };
+	/*
+	 * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
+	 */
 
-	        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
-	                        }
-	                    }
-	                });
+	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
 
-	                if (localeSitelink) {
-	                    // If locale ID is not found, store false to prevent repeated queries
-	                    that.addLocale(params.langCode, localeID);
-	                }
 
-	                callback(null, result);
-	            }
-	        });
-	    },
+	  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"]
 
-	    //
-	    // 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;
 
-	        this.getEntity(params, function(err, data) {
-	            if (err) {
-	                callback(err);
-	                return;
-	            }
+	    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 entity = data.rtype || data.tag || data.key;
-	            if (!entity) {
-	                callback('No entity');
-	                return;
-	            }
+	    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
 
-	            // prepare result
-	            var result = {
-	                title: entity.title,
-	                description: entity.description,
-	                editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
-	            };
+	    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
 
-	            // 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
-	                    });
-	                }
-	            }
 
-	            // 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]
-	                    };
-	                }
-	            }
-	        });
-	    },
+	    while (remainingWays.length) {
+	      nextWay = getNextWay(currNode, remainingWays);
+	      remainingWays = utilArrayDifference(remainingWays, [nextWay]);
 
+	      if (nextWay[0] !== currNode) {
+	        nextWay.reverse();
+	      }
 
-	    addLocale: function(langCode, qid) {
-	        // Makes it easier to unit test
-	        _localeIDs[langCode] = qid;
-	    },
+	      nodes = nodes.concat(nextWay);
+	      currNode = nodes[nodes.length - 1];
+	    } // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
 
 
-	    apibase: function(val) {
-	        if (!arguments.length) { return apibase$3; }
-	        apibase$3 = val;
-	        return this;
+	    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);
+	    });
+	  }
 
-	var jsonpCache = {};
-	window.jsonpCache = jsonpCache;
+	  function shouldKeepNode(node, graph) {
+	    return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+	  }
 
-	function jsonpRequest(url, callback) {
-	    var request = {
-	        abort: function() {}
-	    };
+	  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;
 
-	    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);
+	    for (i = 1; i < points.length - 1; i++) {
+	      var node = nodes[i];
+	      var point = points[i];
 
-	            request.abort = function() { window.clearTimeout(t); };
+	      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);
 	        }
-
-	        return request;
+	      }
 	    }
 
-	    function rand() {
-	        var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
-	        var c = '';
-	        var i = -1;
-	        while (++i < 15) { c += chars.charAt(Math.floor(Math.random() * 52)); }
-	        return c;
+	    for (i = 0; i < toDelete.length; i++) {
+	      graph = actionDeleteNode(toDelete[i].id)(graph);
 	    }
 
-	    function create(url) {
-	        var e = url.match(/callback=(\w+)/);
-	        var c = e ? e[1] : rand();
-
-	        jsonpCache[c] = function(data) {
-	            if (jsonpCache[c]) {
-	                callback(data);
-	            }
-	            finalize();
-	        };
+	    return graph;
+	  };
 
-	        function finalize() {
-	            delete jsonpCache[c];
-	            script.remove();
-	        }
+	  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;
 
-	        request.abort = finalize;
-	        return 'jsonpCache.' + c;
+	    if (threshold === 0) {
+	      return 'too_bendy';
 	    }
 
-	    var cb = create(url);
+	    var maxDistance = 0;
 
-	    var script = select('head')
-	        .append('script')
-	        .attr('type', 'text/javascript')
-	        .attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
-
-	    return request;
-	}
+	    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
 
-	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;
+	      if (isNaN(dist) || dist > threshold) {
+	        return 'too_bendy';
+	      } else if (dist > maxDistance) {
+	        maxDistance = dist;
+	      }
+	    }
 
-	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 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';
+	    }
+	  };
 
-	/**
-	 * abortRequest().
-	 */
-	function abortRequest$6(i) {
-	  i.abort();
+	  action.transitionable = true;
+	  return action;
 	}
 
+	//
+	// `turn` must be an `osmTurn` object with a `restrictionID` property.
+	// see osm/intersection.js, pathToTurn()
+	//
 
-	/**
-	 * 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);
+	function actionUnrestrictTurn(turn) {
+	  return function (graph) {
+	    return actionDeleteRelation(turn.restrictionID)(graph);
+	  };
 	}
 
+	/* Reflect the given area around its axis of symmetry */
 
-	/**
-	 * 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);
+	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
 
-	  // 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];
+
+	    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);
 	    }
-	  });
 
-	  tiles.forEach(function (tile) { return loadNextTilePage$2(which, url, tile); });
-	}
+	    return graph;
+	  };
 
+	  action.useLongAxis = function (val) {
+	    if (!arguments.length) return _useLongAxis;
+	    _useLongAxis = val;
+	    return action;
+	  };
 
-	/**
-	 * 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; }
+	  action.transitionable = true;
+	  return action;
+	}
 
-	  cache.inflight[id] = getBubbles(url, tile, function (bubbles) {
-	    cache.loaded[id] = true;
-	    delete cache.inflight[id];
-	    if (!bubbles) { return; }
+	function actionUpgradeTags(entityId, oldTags, replaceTags) {
+	  return function (graph) {
+	    var entity = graph.entity(entityId);
+	    var tags = Object.assign({}, entity.tags); // shallow copy
 
-	    // [].shift() removes the first element, some statistics info, not a bubble point
-	    bubbles.shift();
+	    var transferValue;
+	    var semiIndex;
 
-	    var features = bubbles.map(function (bubble) {
-	      if (cache.points[bubble.id]) { return null; }  // skip duplicates
+	    for (var oldTagKey in oldTags) {
+	      if (!(oldTagKey in tags)) continue; // wildcard match
 
-	      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 (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]);
 
-	      cache.points[bubble.id] = d;
+	        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;
+	          }
 
-	      // a sequence starts here
-	      if (bubble.pr === undefined) {
-	        cache.leaders.push(bubble.id);
+	          vals.splice(oldIndex, 1);
+	          tags[oldTagKey] = vals.join(';');
+	        }
 	      }
+	    }
 
-	      return {
-	        minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-	      };
+	    if (replaceTags) {
+	      for (var replaceKey in replaceTags) {
+	        var replaceValue = replaceTags[replaceKey];
 
-	    }).filter(Boolean);
+	        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);
 
-	    cache.rtree.load(features);
+	            if (existingVals.indexOf(replaceValue) === -1) {
+	              existingVals.splice(semiIndex, 0, replaceValue);
+	              tags[replaceKey] = existingVals.join(';');
+	            }
+	          } else {
+	            tags[replaceKey] = replaceValue;
+	          }
+	        }
+	      }
+	    }
 
-	    connectSequences();
+	    return graph.replace(entity.update({
+	      tags: tags
+	    }));
+	  };
+	}
 
-	    if (which === 'bubbles') {
-	      dispatch$7.call('loadedBubbles');
-	    }
-	  });
+	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.
 
-	// call this sometimes to connect the bubbles into sequences
-	function connectSequences() {
-	  var cache = _ssCache.bubbles;
-	  var keepLeaders = [];
+	   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.
+	 */
 
-	  for (var i = 0; i < cache.leaders.length; i++) {
-	    var bubble = cache.points[cache.leaders[i]];
-	    var seen = {};
+	function behaviorHover(context) {
+	  var dispatch$1 = dispatch('hover');
 
-	    // try to make a sequence.. use the key of the leader bubble.
-	    var sequence = { key: bubble.key, bubbles: [] };
-	    var complete = false;
+	  var _selection = select(null);
 
-	    do {
-	      sequence.bubbles.push(bubble);
-	      seen[bubble.key] = true;
+	  var _newNodeId = null;
+	  var _initialNodeID = null;
 
-	      if (bubble.ne === undefined) {
-	        complete = true;
-	      } else {
-	        bubble = cache.points[bubble.ne];  // advance to next
-	      }
-	    } while (bubble && !seen[bubble.key] && !complete);
+	  var _altDisables;
 
+	  var _ignoreVertex;
 
-	    if (complete) {
-	      _ssCache.sequences[sequence.key] = sequence;
+	  var _targets = []; // use pointer events on supported platforms; fallback to mouse events
 
-	      // assign bubbles to the sequence
-	      for (var j = 0; j < sequence.bubbles.length; j++) {
-	        sequence.bubbles[j].sequenceKey = sequence.key;
-	      }
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	      // create a GeoJSON LineString
-	      sequence.geojson = {
-	        type: 'LineString',
-	        properties: { key: sequence.key },
-	        coordinates: sequence.bubbles.map(function (d) { return d.loc; })
-	      };
+	  function keydown(d3_event) {
+	    if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);
 
-	    } else {
-	      keepLeaders.push(cache.leaders[i]);
+	      _selection.classed('hover-disabled', true);
+
+	      dispatch$1.call('hover', this, null);
 	    }
 	  }
 
-	  // couldn't complete these, save for later
-	  cache.leaders = keepLeaders;
-	}
+	  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);
 
-	/**
-	 * 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}'
-	  });
+	      dispatch$1.call('hover', this, _targets);
+	    }
+	  }
 
-	  return jsonpRequest(urlForRequest, function (data) {
-	    if (!data || data.error) {
-	      callback(null);
+	  function behavior(selection) {
+	    _selection = selection;
+	    _targets = [];
+
+	    if (_initialNodeID) {
+	      _newNodeId = _initialNodeID;
+	      _initialNodeID = null;
 	    } else {
-	      callback(data);
+	      _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);
 
-	// 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]);
+	    select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);
 
-	  return tiler.getTiles(projection)
-	    .map(function (tile) { return tile.extent; });
-	}
+	    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;
+	      }
 
-	// no more than `limit` results per partition.
-	function searchLimited$2(limit, projection, rtree) {
-	  limit = limit || 5;
+	      return datum;
+	    }
 
-	  return partitionViewport$2(projection)
-	    .reduce(function (result, extent) {
-	      var found = rtree.search(extent.bbox())
-	        .slice(0, limit)
-	        .map(function (d) { return d.data; });
+	    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);
 
-	      return (found.length ? result.concat(found) : result);
-	    }, []);
-	}
+	      if (target && _targets.indexOf(target) === -1) {
+	        _targets.push(target);
 
+	        updateHover(d3_event, _targets);
+	      }
+	    }
 
-	/**
-	 * 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;
-	  });
-	}
+	    function pointerout(d3_event) {
+	      var target = eventTarget(d3_event);
 
+	      var index = _targets.indexOf(target);
 
-	/**
-	 * 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'};
-	    });
-	}
+	      if (index !== -1) {
+	        _targets.splice(index);
 
+	        updateHover(d3_event, _targets);
+	      }
+	    }
 
-	/**
-	 * loadFaces()
-	 */
-	function loadFaces(faceGroup) {
-	  return Promise.all(faceGroup.map(loadCanvas))
-	    .then(function () { return { status: 'loadFaces done' }; });
-	}
+	    function allowsVertex(d) {
+	      return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+	    }
 
+	    function modeAllowsHover(target) {
+	      var mode = context.mode();
 
-	function setupCanvas(selection, reset) {
-	  if (reset) {
-	    selection.selectAll('#ideditor-stitcher-canvases')
-	      .remove();
-	  }
+	      if (mode.id === 'add-point') {
+	        return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
+	      }
 
-	  // 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);
-	}
+	      return true;
+	    }
 
+	    function updateHover(d3_event, targets) {
+	      _selection.selectAll('.hover').classed('hover', 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 [x, y];
-	}
+	      _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
 
+	      var mode = context.mode();
 
-	function getQuadKeys() {
-	  var dim = _resolution / 256;
-	  var quadKeys;
+	      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;
+	      }
 
-	  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'
-	    ];
+	      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);
+	        }
 
-	  } 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'
-	    ];
+	        return true;
+	      });
+	      var selector = '';
 
-	  } else if (dim === 4) {
-	    quadKeys = [
-	      '00','01',  '10','11',
-	      '02','03',  '12','13',
+	      for (var i in targets) {
+	        var datum = targets[i]; // What are we hovering over?
 
-	      '20','21',  '30','31',
-	      '22','23',  '32','33'
-	    ];
+	        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;
 
-	  } else {  // dim === 2
-	    quadKeys = [
-	      '0', '1',
-	      '2', '3'
-	    ];
-	  }
+	          if (datum.type === 'relation') {
+	            for (var j in datum.members) {
+	              selector += ', .' + datum.members[j].id;
+	            }
+	          }
+	        }
+	      }
 
-	  return quadKeys;
-	}
+	      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);
+	      }
 
-	var serviceStreetside = {
-	  /**
-	   * init() initialize streetside.
-	   */
-	  init: function() {
-	    if (!_ssCache) {
-	      this.reset();
+	      dispatch$1.call('hover', this, !suppressed && targets);
 	    }
+	  }
 
-	    this.event = utilRebind(this, dispatch$7, 'on');
-	  },
+	  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);
+	  };
 
-	  /**
-	   * reset() reset the cache.
-	   */
-	  reset: function() {
-	    if (_ssCache) {
-	      Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$6);
-	    }
+	  behavior.altDisables = function (val) {
+	    if (!arguments.length) return _altDisables;
+	    _altDisables = val;
+	    return behavior;
+	  };
 
-	    _ssCache = {
-	      bubbles: { inflight: {}, loaded: {}, nextPage: {}, rtree: new RBush(), points: {}, leaders: [] },
-	      sequences: {}
-	    };
-	  },
+	  behavior.ignoreVertex = function (val) {
+	    if (!arguments.length) return _ignoreVertex;
+	    _ignoreVertex = val;
+	    return behavior;
+	  };
 
-	  /**
-	   * bubbles()
-	   */
-	  bubbles: function(projection) {
-	    var limit = 5;
-	    return searchLimited$2(limit, projection, _ssCache.bubbles.rtree);
-	  },
+	  behavior.initialNodeID = function (nodeId) {
+	    _initialNodeID = nodeId;
+	    return behavior;
+	  };
 
+	  return utilRebind(behavior, dispatch$1, 'on');
+	}
 
-	  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 = [];
+	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');
 
-	    // 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);
-	        }
-	      });
+	  var _hover = behaviorHover(context).altDisables(true).ignoreVertex(true).on('hover', context.ui().sidebar.hover);
 
-	    return results;
-	  },
+	  var _edit = behaviorEdit(context);
 
+	  var _closeTolerance = 4;
+	  var _tolerance = 12;
+	  var _mouseLeave = false;
+	  var _lastMouse = null;
 
-	  /**
-	   * loadBubbles()
-	   */
-	  loadBubbles: function(projection, margin) {
-	    // by default: request 2 nearby tiles so we can connect sequences.
-	    if (margin === undefined) { margin = 2; }
+	  var _lastPointerUpEvent;
 
-	    loadTiles$2('bubbles', bubbleApi, projection, margin);
-	  },
+	  var _downPointer; // use pointer events on supported platforms; fallback to mouse events
 
 
-	  viewer: function() {
-	    return _pannellumViewer;
-	  },
+	  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;
 
-	  initViewer: function () {
-	    if (!window.pannellum) { return; }
-	    if (_pannellumViewer) { return; }
+	    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 sceneID = ++_currScene + '';
-	    var options = {
-	      'default': { firstScene: sceneID },
-	      scenes: {}
+
+	    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)
 	    };
-	    options.scenes[sceneID] = _sceneOptions;
+	    dispatch$1.call('down', this, d3_event, datum(d3_event));
+	  }
 
-	    _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
-	  },
+	  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);
+	    }
+	  }
 
-	  /**
-	   * loadViewer() create the streeside viewer.
-	   */
-	  loadViewer: function(context) {
-	    var that = this;
+	  function pointermove(d3_event) {
+	    if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
+	      var p2 = _downPointer.pointerLocGetter(d3_event);
 
-	    var pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	      var dist = geoVecLength(_downPointer.downLoc, p2);
 
-	    // create ms-wrapper, a photo wrapper class
-	    var wrap = context.container().select('.photoviewer').selectAll('.ms-wrapper')
-	      .data([0]);
+	      if (dist >= _closeTolerance) {
+	        _downPointer.isCancelled = true;
+	        dispatch$1.call('downcancel', this);
+	      }
+	    }
 
-	    // 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();
-	          }
-	        });
-	      })
-	      .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 (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;
+	    }
+	  }
 
-	    function step(stepBy) {
-	      return function () {
-	        var viewer = context.container().select('.photoviewer');
-	        var selected = viewer.empty() ? undefined : viewer.datum();
-	        if (!selected) { return; }
+	  function mouseenter() {
+	    _mouseLeave = false;
+	  }
 
-	        var nextID = (stepBy === 1 ? selected.ne : selected.pr);
-	        var yaw = _pannellumViewer.getYaw();
-	        var ca = selected.ca + yaw;
-	        var origin = selected.loc;
+	  function mouseleave() {
+	    _mouseLeave = true;
+	  }
 
-	        // 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]
-	        ];
+	  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()`
 
-	        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);
+	  function click(d3_event, loc) {
+	    var d = datum(d3_event);
+	    var target = d && d.properties && d.properties.entity;
+	    var mode = context.mode();
 
-	        var extent = poly.reduce(function (extent, point) {
-	          return extent.extend(geoExtent(point));
-	        }, geoExtent());
+	    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());
 
-	        // 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
-	            }
+	      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
 
-	            if (dist < minDist) {
-	              nextID = d.data.key;
-	              minDist = dist;
-	            }
-	          });
 
-	        var nextBubble = nextID && _ssCache.bubbles.points[nextID];
-	        if (!nextBubble) { return; }
+	  function space(d3_event) {
+	    d3_event.preventDefault();
+	    d3_event.stopPropagation();
+	    var currSpace = context.map().mouse();
 
-	        context.map().centerEase(nextBubble.loc);
+	    if (_disableSpace && _lastSpace) {
+	      var dist = geoVecLength(_lastSpace, currSpace);
 
-	        that.selectImage(context, nextBubble)
-	          .then(function (response) {
-	            if (response.status === 'ok') {
-	              _sceneOptions.yaw = yaw;
-	              that.showViewer(context);
-	            }
-	          });
-	      };
+	      if (dist > _tolerance) {
+	        _disableSpace = false;
+	      }
 	    }
-	  },
 
+	    if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click
 
-	  /**
-	   * showViewer()
-	   */
-	  showViewer: function(context, yaw) {
-	    if (!_sceneOptions) { return; }
+	    _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
 
-	    if (yaw !== undefined) {
-	      _sceneOptions.yaw = yaw;
-	    }
+	    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);
+	  }
 
-	    if (!_pannellumViewer) {
-	      this.initViewer();
-	    } else {
-	      // make a new scene
-	      var sceneID = ++_currScene + '';
-	      _pannellumViewer
-	        .addScene(sceneID, _sceneOptions)
-	        .loadScene(sceneID);
+	  function backspace(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch$1.call('undo');
+	  }
 
-	      // remove previous scene
-	      if (_currScene > 2) {
-	        sceneID = (_currScene - 1) + '';
-	        _pannellumViewer
-	          .removeScene(sceneID);
-	      }
-	    }
+	  function del(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch$1.call('cancel');
+	  }
 
-	    var wrap = context.container().select('.photoviewer')
-	      .classed('hide', false);
+	  function ret(d3_event) {
+	    d3_event.preventDefault();
+	    dispatch$1.call('finish');
+	  }
 
-	    var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
+	  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;
+	  }
 
-	    if (isHidden) {
-	      wrap
-	        .selectAll('.photo-wrapper:not(.ms-wrapper)')
-	        .classed('hide', true);
+	  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
 
-	      wrap
-	        .selectAll('.photo-wrapper.ms-wrapper')
-	        .classed('hide', false);
-	    }
+	    select(document).call(keybinding.unbind);
+	  };
 
-	    return this;
-	  },
+	  behavior.hover = function () {
+	    return _hover;
+	  };
 
+	  return utilRebind(behavior, dispatch$1, 'on');
+	}
 
-	  /**
-	   * hideViewer()
-	   */
-	  hideViewer: function (context) {
-	    var viewer = context.container().select('.photoviewer');
-	    if (!viewer.empty()) { viewer.datum(null); }
+	function initRange(domain, range) {
+	  switch (arguments.length) {
+	    case 0:
+	      break;
 
-	    viewer
-	      .classed('hide', true)
-	      .selectAll('.photo-wrapper')
-	      .classed('hide', true);
+	    case 1:
+	      this.range(domain);
+	      break;
 
-	    context.container().selectAll('.viewfield-group, .sequence, .icon-sign')
-	      .classed('currentView', false);
+	    default:
+	      this.range(range).domain(domain);
+	      break;
+	  }
 
-	    return this.setStyles(context, null, true);
-	  },
+	  return this;
+	}
 
+	function constants(x) {
+	  return function () {
+	    return x;
+	  };
+	}
 
-	  /**
-	   * selectImage().
-	   */
-	  selectImage: function (context, d) {
-	    var that = this;
-	    var viewer = context.container().select('.photoviewer');
-	    if (!viewer.empty()) { viewer.datum(d); }
+	function number$1(x) {
+	  return +x;
+	}
 
-	    this.setStyles(context, null, true);
+	var unit = [0, 1];
+	function identity$3(x) {
+	  return x;
+	}
 
-	    var wrap = context.container().select('.photoviewer .ms-wrapper');
-	    var attribution = wrap.selectAll('.photo-attribution').html('');
+	function normalize$1(a, b) {
+	  return (b -= a = +a) ? function (x) {
+	    return (x - a) / b;
+	  } : constants(isNaN(b) ? NaN : 0.5);
+	}
 
-	    wrap.selectAll('.pnlm-load-box')   // display "loading.."
-	      .style('display', 'block');
+	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].
 
-	    if (!d) {
-	      return Promise.resolve({ status: 'ok' });
-	    }
 
-	    var line1 = attribution
-	      .append('div')
-	      .attr('class', 'attribution-row');
+	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));
+	  };
+	}
 
-	    var hiresDomId = utilUniqueDomId('streetside-hires');
+	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.
 
-	    // Add hires checkbox
-	    var label = line1
-	      .append('label')
-	      .attr('for', hiresDomId)
-	      .attr('class', 'streetside-hires');
+	  if (domain[j] < domain[0]) {
+	    domain = domain.slice().reverse();
+	    range = range.slice().reverse();
+	  }
 
-	    label
-	      .append('input')
-	      .attr('type', 'checkbox')
-	      .attr('id', hiresDomId)
-	      .property('checked', _hires)
-	      .on('click', function () {
-	        event.stopPropagation();
+	  while (++i < j) {
+	    d[i] = normalize$1(domain[i], domain[i + 1]);
+	    r[i] = interpolate(range[i], range[i + 1]);
+	  }
 
-	        _hires = !_hires;
-	        _resolution = _hires ? 1024 : 512;
-	        wrap.call(setupCanvas, true);
+	  return function (x) {
+	    var i = bisectRight(domain, x, 1, j) - 1;
+	    return r[i](d[i](x));
+	  };
+	}
 
-	        var viewstate = {
-	          yaw: _pannellumViewer.getYaw(),
-	          pitch: _pannellumViewer.getPitch(),
-	          hfov: _pannellumViewer.getHfov()
-	        };
+	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;
 
-	        that.selectImage(context, d)
-	          .then(function (response) {
-	            if (response.status === 'ok') {
-	              _sceneOptions = Object.assign(_sceneOptions, viewstate);
-	              that.showViewer(context);
-	            }
-	          });
-	      });
+	  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;
+	  }
 
-	    label
-	      .append('span')
-	      .text(_t('streetside.hires'));
+	  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)));
+	  };
 
-	    var captureInfo = line1
-	      .append('div')
-	      .attr('class', 'attribution-capture-info');
+	  scale.domain = function (_) {
+	    return arguments.length ? (domain = Array.from(_, number$1), rescale()) : domain.slice();
+	  };
 
-	    // Add capture date
-	    if (d.captured_by) {
-	      var yyyy = (new Date()).getFullYear();
+	  scale.range = function (_) {
+	    return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
+	  };
 
-	      captureInfo
-	        .append('a')
-	        .attr('class', 'captured_by')
-	        .attr('target', '_blank')
-	        .attr('href', 'https://www.microsoft.com/en-us/maps/streetside')
-	        .text('©' + yyyy + ' Microsoft');
+	  scale.rangeRound = function (_) {
+	    return range = Array.from(_), interpolate$1 = interpolateRound, rescale();
+	  };
 
-	      captureInfo
-	        .append('span')
-	        .text('|');
-	    }
+	  scale.clamp = function (_) {
+	    return arguments.length ? (clamp = _ ? true : identity$3, rescale()) : clamp !== identity$3;
+	  };
 
-	    if (d.captured_at) {
-	      captureInfo
-	        .append('span')
-	        .attr('class', 'captured_at')
-	        .text(localeTimestamp(d.captured_at));
-	    }
+	  scale.interpolate = function (_) {
+	    return arguments.length ? (interpolate$1 = _, rescale()) : interpolate$1;
+	  };
+
+	  scale.unknown = function (_) {
+	    return arguments.length ? (unknown = _, scale) : unknown;
+	  };
 
-	    // Add image links
-	    var line2 = attribution
-	      .append('div')
-	      .attr('class', 'attribution-row');
+	  return function (t, u) {
+	    transform = t, untransform = u;
+	    return rescale();
+	  };
+	}
+	function continuous() {
+	  return transformer$1()(identity$3, identity$3);
+	}
 
-	    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'));
+	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].
 
-	    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 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).
 
-	    var bubbleIdQuadKey = d.key.toString(4);
-	    var paddingNeeded = 16 - bubbleIdQuadKey.length;
-	    for (var i = 0; i < paddingNeeded; i++) {
-	      bubbleIdQuadKey = '0' + bubbleIdQuadKey;
+	  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];
 	    }
-	    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'];
+	    return t.reverse().join(thousands);
+	  };
+	}
 
-	    // 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]
-	        };
-	      });
+	function formatNumerals (numerals) {
+	  return function (value) {
+	    return value.replace(/[0-9]/g, function (i) {
+	      return numerals[+i];
 	    });
+	  };
+	}
 
-	    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' };
-	      });
-	  },
+	// [[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 + "";
+	}
 
-	  getSequenceKeyForBubble: function(d) {
-	    return d && d.sequenceKey;
-	  },
+	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;
 
-	  // 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);
+	      case "0":
+	        if (i0 === 0) i0 = i;
+	        i1 = i;
+	        break;
 
-	      context.container().selectAll('.sequence')
-	        .classed('highlighted', false)
-	        .classed('currentView', false);
+	      default:
+	        if (!+s[i]) break out;
+	        if (i0 > 0) i0 = 0;
+	        break;
 	    }
+	  }
 
-	    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; })) || [];
+	  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
+	}
 
-	    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; })) || [];
+	// `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;
+	};
 
-	    // highlight sibling viewfields on either the selected or the hovered sequences
-	    var highlightedBubbleKeys = utilArrayUnion(hoveredBubbleKeys, selectedBubbleKeys);
+	// `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;
+	};
+
+	var nativeToFixed = 1.0.toFixed;
+	var floor$6 = Math.floor;
+
+	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);
+	};
 
-	    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; });
+	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;
+	};
 
-	    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; });
+	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({});
+	});
 
-	    // update viewfields if needed
-	    context.container().selectAll('.viewfield-group .viewfield')
-	      .attr('d', viewfieldPath);
+	// `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);
+	      }
+	    };
 
-	    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';
+	    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;
+	      }
+	    };
+
+	    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 {
-	        return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+	        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;
+	  }
+	});
 
-	    return this;
+	var nativeToPrecision = 1.0.toPrecision;
+
+	var FORCED$d = fails(function () {
+	  // IE7-
+	  return nativeToPrecision.call(1, undefined) !== '1';
+	}) || !fails(function () {
+	  // V8 ~ Android 4.3-
+	  nativeToPrecision.call({});
+	});
+
+	// `Number.prototype.toPrecision` method
+	// https://tc39.github.io/ecma262/#sec-number.prototype.toprecision
+	_export({ target: 'Number', proto: true, forced: FORCED$d }, {
+	  toPrecision: function toPrecision(precision) {
+	    return precision === undefined
+	      ? nativeToPrecision.call(thisNumberValue(this))
+	      : nativeToPrecision.call(thisNumberValue(this), precision);
+	  }
+	});
+
+	var 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!
+	}
+
+	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");
+	}
+
+	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);
+	  }
+	};
+
+	function identity$4 (x) {
+	  return x;
+	}
+
+	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$4 : formatNumerals(map.call(locale.numerals, String)),
+	      percent = locale.percent === undefined ? "%" : locale.percent + "",
+	      minus = locale.minus === undefined ? "−" : locale.minus + "",
+	      nan = locale.nan === undefined ? "NaN" : locale.nan + "";
+
+	  function newFormat(specifier) {
+	    specifier = formatSpecifier(specifier);
+	    var fill = specifier.fill,
+	        align = specifier.align,
+	        sign = specifier.sign,
+	        symbol = specifier.symbol,
+	        zero = specifier.zero,
+	        width = specifier.width,
+	        comma = specifier.comma,
+	        precision = specifier.precision,
+	        trim = specifier.trim,
+	        type = specifier.type; // The "n" type is an alias for ",g".
+
+	    if (type === "n") comma = true, type = "g"; // The "" type, and any invalid type, is an alias for ".12~g".
+	    else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = "g"; // If zero fill is specified, padding goes after sign and before digits.
+
+	    if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "="; // Compute the prefix and suffix.
+	    // For SI-prefix, the suffix is lazily computed.
+
+	    var prefix = symbol === "$" ? 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));
 
-	  /**
-	   * cache().
-	   */
-	  cache: function () {
-	    return _ssCache;
-	  }
-	};
+	    function format(value) {
+	      var valuePrefix = prefix,
+	          valueSuffix = suffix,
+	          i,
+	          n,
+	          c;
 
-	var apibase$4 = 'https://taginfo.openstreetmap.org/api/4/';
-	var _inflight$2 = {};
-	var _popularKeys = {};
-	var _taginfoCache = {};
+	      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 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 valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.
 
+	        value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.
 
-	function sets(params, n, o) {
-	    if (params.geometry && o[params.geometry]) {
-	        params[n] = o[params.geometry];
-	    }
-	    return params;
-	}
+	        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.
 
-	function setFilter(params) {
-	    return sets(params, 'filter', tag_filters);
-	}
+	        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;
 
-	function setSort(params) {
-	    return sets(params, 'sortname', tag_sorts);
-	}
+	          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.
 
 
-	function setSortMembers(params) {
-	    return sets(params, 'sortname', tag_sort_members);
-	}
+	      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.
 
-	function clean(params) {
-	    return utilObjectOmit(params, ['geometry', 'debounce']);
-	}
+	      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;
 
-	function filterKeys(type) {
-	    var count_type = type ? 'count_' + type : 'count_all';
-	    return function(d) {
-	        return parseFloat(d[count_type]) > 2500 || d.in_wiki;
-	    };
-	}
+	        case "=":
+	          value = valuePrefix + padding + value + valueSuffix;
+	          break;
 
+	        case "^":
+	          value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
+	          break;
 
-	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);
-	    };
-	}
+	        default:
+	          value = padding + valuePrefix + value + valueSuffix;
+	          break;
+	      }
 
+	      return numerals(value);
+	    }
 
-	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;
+	    format.toString = function () {
+	      return specifier + "";
 	    };
-	}
 
+	    return format;
+	  }
 
-	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;
+	  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;
 	    };
-	}
-
+	  }
 
-	function valKey(d) {
-	    return {
-	        value: d.key,
-	        title: d.key
-	    };
+	  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;
+	}
 
-	function valKeyDescription(d) {
-	    var obj = {
-	        value: d.value,
-	        title: d.description || d.value
-	    };
-	    if (d.count) {
-	        obj.count = d.count;
-	    }
-	    return obj;
+	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 roleKey(d) {
-	    return {
-	        value: d.role,
-	        title: d.role
-	    };
+	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);
 
-	// 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;
-	}
+	  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;
+	      }
 
-	var debouncedRequest$1 = debounce(request$1, 300, { leading: false });
+	    case "f":
+	    case "%":
+	      {
+	        if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
+	        break;
+	      }
+	  }
 
-	function request$1(url, params, exactMatch, callback, loaded) {
-	    if (_inflight$2[url]) { return; }
+	  return format(specifier);
+	}
 
-	    if (checkCache(url, params, exactMatch, callback)) { return; }
+	function linearish(scale) {
+	  var domain = scale.domain;
 
-	    var controller = new AbortController();
-	    _inflight$2[url] = controller;
+	  scale.ticks = function (count) {
+	    var d = domain();
+	    return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+	  };
 
-	    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); }
-	        });
-	}
+	  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();
+	    var i0 = 0;
+	    var i1 = d.length - 1;
+	    var start = d[i0];
+	    var stop = d[i1];
+	    var prestep;
+	    var step;
+	    var maxIter = 10;
 
-	function checkCache(url, params, exactMatch, callback) {
-	    var rp = params.rp || 25;
-	    var testQuery = params.query || '';
-	    var testUrl = url;
+	    if (stop < start) {
+	      step = start, start = stop, stop = step;
+	      step = i0, i0 = i1, i1 = step;
+	    }
 
-	    do {
-	        var hit = _taginfoCache[testUrl];
+	    while (maxIter-- > 0) {
+	      step = tickIncrement(start, stop, count);
 
-	        // exact match, or shorter match yielding fewer than max results (rp)
-	        if (hit && (url === testUrl || hit.length < rp)) {
-	            callback(null, hit);
-	            return true;
-	        }
+	      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;
+	      }
 
-	        // don't try to shorten the query
-	        if (exactMatch || !testQuery.length) { return false; }
+	      prestep = step;
+	    }
 
-	        // 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);
+	    return scale;
+	  };
 
-	    return false;
+	  return scale;
 	}
+	function linear$2() {
+	  var scale = continuous();
 
+	  scale.copy = function () {
+	    return copy(scale, linear$2());
+	  };
 
-	var serviceTaginfo = {
+	  initRange.apply(scale, arguments);
+	  return linearish(scale);
+	}
 
-	    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 nativeExpm1 = Math.expm1;
+	var exp$1 = Math.exp;
 
-	        // 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;
-	            });
-	        });
-	    },
+	// `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;
 
+	function quantize() {
+	  var x0 = 0,
+	      x1 = 1,
+	      n = 1,
+	      domain = [0.5],
+	      range = [0, 1],
+	      unknown;
 
-	    reset: function() {
-	        Object.values(_inflight$2).forEach(function(controller) { controller.abort(); });
-	        _inflight$2 = {};
-	    },
+	  function scale(x) {
+	    return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
+	  }
 
+	  function rescale() {
+	    var i = -1;
+	    domain = new Array(n);
 
-	    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);
+	    while (++i < n) {
+	      domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
+	    }
 
-	        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);
-	            }
-	        });
-	    },
+	    return scale;
+	  }
 
+	  scale.domain = function (_) {
+	    var _ref, _ref2;
 
-	    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);
-	            }
-	        });
-	    },
+	    return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
+	  };
 
+	  scale.range = function (_) {
+	    return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
+	  };
 
-	    values: function(params, callback) {
-	        // Exclude popular keys from values lookups.. see #3955
-	        var key = params.key;
-	        if (key && _popularKeys[key]) {
-	            callback(null, []);
-	            return;
-	        }
+	  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]];
+	  };
 
-	        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);
+	  scale.unknown = function (_) {
+	    return arguments.length ? (unknown = _, scale) : scale;
+	  };
 
-	        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);
-	            }
-	        });
-	    },
+	  scale.thresholds = function () {
+	    return domain.slice();
+	  };
 
+	  scale.copy = function () {
+	    return quantize().domain([x0, x1]).range(range).unknown(unknown);
+	  };
 
-	    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 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
+	});
 
-	    docs: function(params, callback) {
-	        var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-	        params = clean(setSort(params));
+	function behaviorBreathe() {
+	  var duration = 800;
+	  var steps = 4;
+	  var selector = '.selected.shadow, .selected .shadow';
 
-	        var path = 'key/wiki_pages?';
-	        if (params.value) {
-	            path = 'tag/wiki_pages?';
-	        } else if (params.rtype) {
-	            path = 'relation/wiki_pages?';
-	        }
+	  var _selected = select(null);
 
-	        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);
-	            }
-	        });
-	    },
+	  var _classed = '';
+	  var _params = {};
+	  var _done = false;
 
+	  var _timer;
 
-	    apibase: function(_) {
-	        if (!arguments.length) { return apibase$4; }
-	        apibase$4 = _;
-	        return this;
-	    }
+	  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);
+	  }
 
-	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;
-	    }
-	    if (options.bbox) {
-	        feat.bbox = options.bbox;
-	    }
-	    feat.properties = properties || {};
-	    feat.geometry = geom;
-	    return feat;
-	}
-	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");
-	    }
-	}
-	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.");
-	            }
-	        }
-	    }
-	    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;
-	}
-	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;
-	}
-	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;
-	}
-	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");
-	    }
-	    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");
-	    }
-	    var startFactor = exports.areaFactors[originalUnit];
-	    if (!startFactor) {
-	        throw new Error("invalid original units");
-	    }
-	    var finalFactor = exports.areaFactors[finalUnit];
-	    if (!finalFactor) {
-	        throw new Error("invalid final units");
-	    }
-	    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);
-	}
-	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
-	 */
-	function validateBBox(bbox) {
-	    if (!bbox) {
-	        throw new Error("bbox is required");
-	    }
-	    if (!Array.isArray(bbox)) {
-	        throw new Error("bbox must be an Array");
+	  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 (bbox.length !== 4 && bbox.length !== 6) {
-	        throw new Error("bbox must be an Array of 4 or 6 numbers");
+
+	    if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
+	      _selected.call(reset);
+
+	      _classed = currClassed;
+	      _selected = currSelected.call(calcAnimationParams);
 	    }
-	    bbox.forEach(function (num) {
-	        if (!isNumber(num)) {
-	            throw new Error("bbox must only contain numbers");
-	        }
+
+	    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));
+	      }
 	    });
-	}
-	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");
+	  }
+
+	  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();
+	      }
 	    }
-	    if (["string", "number"].indexOf(typeof id) === -1) {
-	        throw new Error("id must be a number or a string");
+	  };
+
+	  behavior.off = function () {
+	    _done = true;
+
+	    if (_timer) {
+	      _timer.stop();
 	    }
+
+	    _selected.interrupt().call(reset);
+	  };
+
+	  return behavior;
 	}
-	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`");
-	}
-	exports.convertDistance = convertDistance;
-	});
 
-	var invariant = createCommonjsModule(function (module, exports) {
-	Object.defineProperty(exports, "__esModule", { value: true });
+	/* Creates a keybinding behavior for an operation */
+	function behaviorOperation(context) {
+	  var _operation;
 
-	/**
-	 * 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;
-	        }
+	  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 {
+	      context.ui().flash.duration(2000).iconName('#iD-operation-' + _operation.id).iconClass('operation').label(_operation.annotation() || _operation.title)();
+	      if (_operation.point) _operation.point(null);
+
+	      _operation();
 	    }
-	    if (Array.isArray(coord) && coord.length >= 2 && !Array.isArray(coord[0]) && !Array.isArray(coord[1])) {
-	        return coord;
+	  }
+
+	  function behavior() {
+	    if (_operation && _operation.available()) {
+	      context.keybinding().on(_operation.keys, keypress);
 	    }
-	    throw new Error("coord must be GeoJSON Point or an Array of numbers");
+
+	    return behavior;
+	  }
+
+	  behavior.off = function () {
+	    context.keybinding().off(_operation.keys);
+	  };
+
+	  behavior.which = function (_) {
+	    if (!arguments.length) return _operation;
+	    _operation = _;
+	    return behavior;
+	  };
+
+	  return behavior;
 	}
-	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;
+
+	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()));
 	    }
-	    // Feature
-	    if (coords.type === "Feature") {
-	        if (coords.geometry !== null) {
-	            return coords.geometry.coordinates;
+
+	    return actionCircularize(entityID, context.projection);
+	  }
+
+	  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);
 	        }
+	      });
+
+	      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';
 	    }
-	    else {
-	        // Geometry
-	        if (coords.coordinates) {
-	            return coords.coordinates;
+
+	    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;
 	    }
-	    throw new Error("coords must be GeoJSON Feature, Geometry Object or an Array");
+	  };
+
+	  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.feature', {
+	      n: _actions.length
+	    });
+	  };
+
+	  operation.id = 'circularize';
+	  operation.keys = [_t('operations.circularize.key')];
+	  operation.title = _t('operations.circularize.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
-	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;
+
+	// For example, ⌘Z -> Ctrl+Z
+
+	var uiCmd = function uiCmd(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];
 	    }
-	    if (Array.isArray(coordinates[0]) && coordinates[0].length) {
-	        return containsNumber(coordinates[0]);
+	  }
+
+	  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;
+	        }
+
+	        nextSelectedID = nodes[i];
+	        nextSelectedLoc = context.entity(nextSelectedID).loc;
+	      }
 	    }
-	    throw new Error("coordinates must only contain numbers");
-	}
-	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.
-	 */
-	function geojsonType(value, type, name) {
-	    if (!type || !name) {
-	        throw new Error("type and name required");
+
+	    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));
 	    }
-	    if (!value || value.type !== type) {
-	        throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + value.type);
+	  };
+
+	  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';
 	    }
-	}
-	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");
+
+	    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;
 	    }
-	    if (!name) {
-	        throw new Error(".featureOf() requires a name");
+
+	    function hasWikidataTag(id) {
+	      var entity = context.entity(id);
+	      return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
 	    }
-	    if (!feature || feature.type !== "Feature" || !feature.geometry) {
-	        throw new Error("Invalid input to " + name + ", Feature with geometry required");
+
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
 	    }
-	    if (!feature.geometry || feature.geometry.type !== type) {
-	        throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
+
+	    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.feature', {
+	      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;
 	}
-	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");
-	    }
-	    if (!name) {
-	        throw new Error(".collectionOf() requires a name");
-	    }
-	    if (!featureCollection || featureCollection.type !== "FeatureCollection") {
-	        throw new Error("Invalid input to " + name + ", FeatureCollection required");
+
+	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);
+	        }
+	      }
 	    }
-	    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");
+
+	    return null;
+	  }
+
+	  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);
 	        }
-	        if (!feature.geometry || feature.geometry.type !== type) {
-	            throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
+	      });
+
+	      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, {
+	      n: _actions.length
+	    });
+	  };
+
+	  operation.id = 'orthogonalize';
+	  operation.keys = [_t('operations.orthogonalize.key')];
+	  operation.title = _t('operations.orthogonalize.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
-	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;
-	    }
-	    return geojson;
+
+	function operationReflectShort(context, selectedIDs) {
+	  return operationReflect(context, selectedIDs, 'short');
 	}
-	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 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 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
+	  };
+
+	  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';
 	    }
-	    if (geojson.type === "GeometryCollection") {
-	        return "GeometryCollection";
+
+	    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;
 	    }
-	    if (geojson.type === "Feature" && geojson.geometry !== null) {
-	        return geojson.geometry.type;
+
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
 	    }
-	    return geojson.type;
+	  };
+
+	  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 + '.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;
 	}
-	exports.getType = getType;
-	});
 
-	var lineclip_1 = lineclip;
-	var _default = lineclip;
+	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());
 
-	lineclip.polyline = lineclip;
-	lineclip.polygon = polygonclip;
+	  var operation = function operation() {
+	    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';
+	    }
 
-	// Cohen-Sutherland line clippign algorithm, adapted to efficiently
-	// handle polylines rather than just segments
+	    return false;
 
-	function lineclip(points, bbox, result) {
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
+
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	    var len = points.length,
-	        codeA = bitCode(points[0], bbox),
-	        part = [],
-	        i, a, b, codeB, lastCode;
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
+	        }
+	      }
 
-	    if (!result) { result = []; }
+	      return false;
+	    }
 
-	    for (i = 1; i < len; i++) {
-	        a = points[i - 1];
-	        b = points[i];
-	        codeB = lastCode = bitCode(b, bbox);
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
+	    }
+	  };
 
-	        while (true) {
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
+	  };
 
-	            if (!(codeA | codeB)) { // accept
-	                part.push(a);
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.move.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	                if (codeB !== lastCode) { // segment went outside
-	                    part.push(b);
+	  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;
+	}
 
-	                    if (i < len - 1) { // start a new line
-	                        result.push(part);
-	                        part = [];
-	                    }
-	                } else if (i === len - 1) {
-	                    part.push(b);
-	                }
-	                break;
+	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
+	  });
 
-	            } else if (codeA & codeB) { // trivial reject
-	                break;
+	  var _prevGraph;
 
-	            } else if (codeA) { // a outside, intersect with clip edge
-	                a = intersect(a, b, codeA, bbox);
-	                codeA = bitCode(a, bbox);
+	  var _prevAngle;
 
-	            } else { // b outside
-	                b = intersect(a, b, codeB, bbox);
-	                codeB = bitCode(b, bbox);
-	            }
-	        }
+	  var _prevTransform;
+
+	  var _pivot;
+
+	  function doRotate() {
+	    var fn;
+
+	    if (context.graph() !== _prevGraph) {
+	      fn = context.perform;
+	    } else {
+	      fn = context.replace;
+	    } // projection changed, recalculate _pivot
 
-	        codeA = lastCode;
+
+	    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;
 	    }
 
-	    if (part.length) { result.push(part); }
+	    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();
+	  }
 
-	    return result;
+	  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(d3_event) {
+	    d3_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;
 	}
 
-	// Sutherland-Hodgeman polygon clipping algorithm
+	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());
 
-	function polygonclip(points, bbox) {
+	  var operation = function operation() {
+	    context.enter(modeRotate(context, selectedIDs));
+	  };
 
-	    var result, edge, prev, prevInside, i, p, inside;
+	  operation.available = function () {
+	    return nodes.length >= 2;
+	  };
 
-	    // 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);
+	  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';
+	    }
 
-	        for (i = 0; i < points.length; i++) {
-	            p = points[i];
-	            inside = !(bitCode(p, bbox) & edge);
+	    return false;
 
-	            // if segment goes through the clip window, add an intersection
-	            if (inside !== prevInside) { result.push(intersect(prev, p, edge, bbox)); }
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	            if (inside) { result.push(p); } // add a point if it's inside
+	      if (osm) {
+	        var missing = coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	            prev = p;
-	            prevInside = inside;
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
 	        }
+	      }
 
-	        points = result;
+	      return false;
+	    }
 
-	        if (!points.length) { break; }
+	    function incompleteRelation(id) {
+	      var entity = context.entity(id);
+	      return entity.type === 'relation' && !entity.isComplete(context.graph());
 	    }
+	  };
 
-	    return result;
-	}
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.rotate.' + disable + '.' + multi) : _t('operations.rotate.description.' + multi);
+	  };
 
-	// intersect a segment against one of the 4 lines that make up the bbox
+	  operation.annotation = function () {
+	    return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	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;
+	  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;
 	}
 
-	// bit code reflects the point position relative to the bbox:
+	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
+	  });
 
-	//         left  mid  right
-	//    top  1001  1000  1010
-	//    mid  0001  0000  0010
-	// bottom  0101  0100  0110
+	  var _prevGraph;
 
-	function bitCode(p, bbox) {
-	    var code = 0;
+	  var _cache;
 
-	    if (p[0] < bbox[0]) { code |= 1; } // left
-	    else if (p[0] > bbox[2]) { code |= 2; } // right
+	  var _origin;
 
-	    if (p[1] < bbox[1]) { code |= 4; } // bottom
-	    else if (p[1] > bbox[3]) { code |= 8; } // top
+	  var _nudgeInterval;
 
-	    return code;
-	}
-	lineclip_1.default = _default;
+	  function doMove(nudge) {
+	    nudge = nudge || [0, 0];
+	    var fn;
 
-	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 });
+	    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();
+	  }
 
-	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");
+	  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;
 	    }
-	}
-	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);
-	            }
-	        }
+	  }
+
+	  function move() {
+	    doMove();
+	    var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
+
+	    if (nudge) {
+	      startNudge(nudge);
+	    } else {
+	      stopNudge();
 	    }
-	    return outRings;
+	  }
+
+	  function finish(d3_event) {
+	    d3_event.stopPropagation();
+	    context.replace(actionNoop(), annotation);
+	    context.enter(modeSelect(context, entityIDs));
+	    stopNudge();
+	  }
+
+	  function cancel() {
+	    if (baseGraph) {
+	      while (context.graph() !== baseGraph) {
+	        context.pop();
+	      }
+
+	      context.enter(modeBrowse(context));
+	    } else {
+	      context.pop();
+	      context.enter(modeSelect(context, entityIDs));
+	    }
+
+	    stopNudge();
+	  }
+
+	  function undone() {
+	    context.enter(modeBrowse(context));
+	  }
+
+	  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;
 	}
-	});
 
-	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);
+	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);
+	    });
 
-	    var seen = [];
-	    return (function stringify (node) {
-	        if (node && node.toJSON && typeof node.toJSON === 'function') {
-	            node = node.toJSON();
-	        }
+	    for (var id in copies) {
+	      var oldEntity = oldGraph.entity(id);
+	      var newEntity = copies[id];
 
-	        if (node === undefined) { return; }
-	        if (typeof node == 'number') { return isFinite(node) ? '' + node : 'null'; }
-	        if (typeof node !== 'object') { return JSON.stringify(node); }
+	      extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-	        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 (node === null) { return 'null'; }
+	      var parents = context.graph().parentWays(newEntity);
+	      var parentCopied = parents.some(function (parent) {
+	        return originals.has(parent.id);
+	      });
 
-	        if (seen.indexOf(node) !== -1) {
-	            if (cycles) { return JSON.stringify('__cycle__'); }
-	            throw new TypeError('Converting circular structure to JSON');
-	        }
+	      if (!parentCopied) {
+	        newIDs.push(newEntity.id);
+	      }
+	    } // Put pasted objects where mouse pointer is..
 
-	        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]);
 
-	            if (!value) { continue; }
-	            if (out) { out += ','; }
-	            out += JSON.stringify(key) + ':' + value;
-	        }
-	        seen.splice(seenIndex, 1);
-	        return '{' + out + '}';
-	    })(data);
-	};
+	    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 DEFAULT_COMPARE (a, b) { return a > b ? 1 : a < b ? -1 : 0; }
+	  function behavior() {
+	    context.keybinding().on(uiCmd('⌘V'), doPaste);
+	    return behavior;
+	  }
 
-	var SplayTree = function SplayTree(compare, noDuplicates) {
-	  if ( compare === void 0 ) compare = DEFAULT_COMPARE;
-	  if ( noDuplicates === void 0 ) noDuplicates = false;
+	  behavior.off = function () {
+	    context.keybinding().off(uiCmd('⌘V'));
+	  };
 
-	  this._compare = compare;
-	  this._root = null;
-	  this._size = 0;
-	  this._noDuplicates = !!noDuplicates;
-	};
+	  return behavior;
+	}
 
-	var prototypeAccessors = { size: { configurable: true } };
+	// `String.prototype.repeat` method
+	// https://tc39.github.io/ecma262/#sec-string.prototype.repeat
+	_export({ target: 'String', proto: true }, {
+	  repeat: stringRepeat
+	});
 
+	/*
+	    `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
 
-	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;
-	  }
+	    * 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.
+	 */
 
-	  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 behaviorDrag() {
+	  var dispatch$1 = dispatch('start', 'move', 'end'); // see also behaviorSelect
 
+	  var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
 
-	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;
-	  }
+	  var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
 
-	  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;
-	};
+	  var _origin = null;
+	  var _selector = '';
 
+	  var _targetNode;
 
-	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);
-	    }
-	  }
-	};
+	  var _targetEntity;
 
+	  var _surface;
 
-	SplayTree.prototype.splay = function splay (x) {
-	  var p, gp, ggp, l, r;
+	  var _pointerId; // use pointer events on supported platforms; fallback to mouse events
 
-	  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;
-	    }
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	    l = x.left; r = x.right;
+	  var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
 
-	    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; }
+	  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);
+	    };
+	  };
 
-	          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; }
+	  function pointerdown(d3_event) {
+	    if (_pointerId) return;
+	    _pointerId = d3_event.pointerId || 'mouse';
+	    _targetNode = this; // only force reflow once per drag
 
-	          x.right = gp;
-	          gp.parent = x;
-	        }
-	      }
-	      if (l) {
-	        p.right = l;
-	        l.parent = p;
-	      } else { p.right = null; }
+	    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);
 
-	      x.left = p;
-	      p.parent = x;
+	    if (_origin) {
+	      offset = _origin.call(_targetNode, _targetEntity);
+	      offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
+	    } else {
+	      offset = [0, 0];
 	    }
-	  }
-	};
 
+	    d3_event.stopPropagation();
 
-	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; }
-	};
+	    function pointermove(d3_event) {
+	      if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      var p = pointerLocGetter(d3_event);
 
+	      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
 
-	SplayTree.prototype.minNode = function minNode (u) {
-	    if ( u === void 0 ) u = this._root;
+	        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]);
+	      }
+	    }
 
-	  if (u) { while (u.left) { u = u.left; } }
-	  return u;
-	};
+	    function pointerup(d3_event) {
+	      if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+	      _pointerId = null;
 
+	      if (started) {
+	        dispatch$1.call('end', this, d3_event, _targetEntity);
+	        d3_event.preventDefault();
+	      }
 
-	SplayTree.prototype.maxNode = function maxNode (u) {
-	    if ( u === void 0 ) u = this._root;
+	      select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+	      selectEnable();
+	    }
+	  }
 
-	  if (u) { while (u.right) { u = u.right; } }
-	  return u;
-	};
+	  function behavior(selection) {
+	    var matchesSelector = utilPrefixDOMProperty('matchesSelector');
+	    var delegate = pointerdown;
 
+	    if (_selector) {
+	      delegate = function delegate(d3_event) {
+	        var root = this;
+	        var target = d3_event.target;
 
-	SplayTree.prototype.insert = function insert (key, data) {
-	  var z = this._root;
-	  var p = null;
-	  var comp = this._compare;
-	  var cmp;
+	        for (; target && target !== root; target = target.parentNode) {
+	          var datum = target.__data__;
+	          _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;
 
-	  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; }
+	          if (_targetEntity && target[matchesSelector](_selector)) {
+	            return pointerdown.call(target, d3_event);
+	          }
+	        }
+	      };
 	    }
-	  }
 
-	  z = { key: key, data: data, left: null, right: null, parent: p };
+	    selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
+	  }
 
-	  if (!p)                        { this._root = z; }
-	  else if (comp(p.key, z.key) < 0) { p.right = z; }
-	  else                           { p.left= z; }
+	  behavior.off = function (selection) {
+	    selection.on(_pointerPrefix + 'down.drag' + _selector, null);
+	  };
 
-	  this.splay(z);
-	  this._size++;
-	  return z;
-	};
+	  behavior.selector = function (_) {
+	    if (!arguments.length) return _selector;
+	    _selector = _;
+	    return behavior;
+	  };
 
+	  behavior.origin = function (_) {
+	    if (!arguments.length) return _origin;
+	    _origin = _;
+	    return behavior;
+	  };
 
-	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;
-	};
+	  behavior.cancel = function () {
+	    select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+	    return behavior;
+	  };
 
-	/**
-	 * 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; }
-	  }
+	  behavior.targetNode = function (_) {
+	    if (!arguments.length) return _targetNode;
+	    _targetNode = _;
+	    return behavior;
+	  };
 
-	  return false;
-	};
+	  behavior.targetEntity = function (_) {
+	    if (!arguments.length) return _targetEntity;
+	    _targetEntity = _;
+	    return behavior;
+	  };
 
+	  behavior.surface = function (_) {
+	    if (!arguments.length) return _surface;
+	    _surface = _;
+	    return behavior;
+	  };
 
-	SplayTree.prototype.remove = function remove (key) {
-	  var z = this.find(key);
+	  return utilRebind(behavior, dispatch$1, 'on');
+	}
 
-	  if (!z) { return false; }
+	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);
 
-	  this.splay(z);
+	  var _nudgeInterval;
 
-	  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 _restoreSelectedIDs = [];
+	  var _wasMidpoint = false;
+	  var _isCancelled = false;
 
-	  this._size--;
-	  return true;
-	};
+	  var _activeEntity;
 
+	  var _startLoc;
 
-	SplayTree.prototype.removeNode = function removeNode (z) {
-	  if (!z) { return false; }
+	  var _lastLoc;
 
-	  this.splay(z);
+	  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);
+	  }
 
-	  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;
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
 	    }
-	    this.replace(z, y);
-	    y.left = z.left;
-	    y.left.parent = y;
 	  }
 
-	  this._size--;
-	  return true;
-	};
+	  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());
 
-	SplayTree.prototype.erase = function erase (key) {
-	  var z = this.find(key);
-	  if (!z) { return; }
+	    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
 
-	  this.splay(z);
+	      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');
+	        }
 
-	  var s = z.left;
-	  var t = z.right;
+	        return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
+	      }
+	    }
 
-	  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;
+	    return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
 	  }
 
-	  this._size--;
-	};
+	  function shouldSnapToNode(target) {
+	    if (!_activeEntity) return false;
+	    return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
+	  }
 
-	/**
-	 * 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);
+	  function origin(entity) {
+	    return context.projection(entity.loc);
 	  }
-	  return returnValue;
-	};
 
+	  function keydown(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope')) {
+	        context.surface().classed('nope-suppressed', true);
+	      }
 
-	/* eslint-disable class-methods-use-this */
+	      context.surface().classed('nope', false).classed('nope-disabled', true);
+	    }
+	  }
 
-	/**
-	 * 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;
+	  function keyup(d3_event) {
+	    if (d3_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);
 	    }
 	  }
-	  return successor;
-	};
 
+	  function start(d3_event, entity) {
+	    _wasMidpoint = entity.type === 'midpoint';
+	    var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
+	    _isCancelled = !context.editable() || d3_event.shiftKey || hasHidden;
 
-	/**
-	 * 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 (_isCancelled) {
+	      if (hasHidden) {
+	        context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
 	      }
-	    }
-	  }
-	  return predecessor;
-	};
-	/* eslint-enable class-methods-use-this */
 
+	      return drag.cancel();
+	    }
 
-	/**
-	 * @param{forEachCallback} callback
-	 * @return {SplayTree}
-	 */
-	SplayTree.prototype.forEach = function forEach (callback) {
-	  var current = this._root;
-	  var s = [], done = false, i = 0;
+	    if (_wasMidpoint) {
+	      var midpoint = entity;
+	      entity = osmNode();
+	      context.perform(actionAddMidpoint(midpoint, entity));
+	      entity = context.entity(entity.id); // get post-action entity
 
-	  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;
+	      var vertex = context.surface().selectAll('.' + entity.id);
+	      drag.targetNode(vertex.node()).targetEntity(entity);
 	    } 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; }
+	      context.perform(actionNoop());
 	    }
-	  }
-	  return this;
-	};
 
+	    _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()`
 
-	/**
-	 * 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;
 
-	  while (Q.length !== 0 || node) {
-	    if (node) {
-	      Q.push(node);
-	      node = node.left;
+	  function datum(d3_event) {
+	    if (!d3_event || d3_event.altKey) {
+	      return {};
 	    } 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
+	      // 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;
+	        }
 	      }
-	      node = node.right;
 	    }
-	  }
-	  return this;
-	};
 
-	/**
-	 * Returns all keys in order
-	 * @return {Array<Key>}
-	 */
-	SplayTree.prototype.keys = function keys () {
-	  var current = this._root;
-	  var s = [], r = [], done = false;
+	    context.replace(actionMoveNode(entity.id, loc)); // Below here: validations
 
-	  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; }
-	    }
-	  }
-	  return r;
-	};
+	    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..
 
-	/**
-	 * 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;
 
-	  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 (!isInvalid) {
+	      isInvalid = hasInvalidGeometry(entity, context.graph());
 	    }
-	  }
-	  return r;
-	};
 
+	    var nope = context.surface().classed('nope');
 
-	/**
-	 * 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;
+	    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('')();
+	      }
+	    }
 
-	  var current = this._root;
-	  var s = [], done = false, i = 0;
+	    var nopeDisabled = context.surface().classed('nope-disabled');
 
-	  while (!done) {
-	    if (current) {
-	      s.push(current);
-	      current = current.left;
+	    if (nopeDisabled) {
+	      context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
 	    } else {
-	      if (s.length > 0) {
-	        current = s.pop();
-	        if (i === index) { return current; }
-	        i++;
-	        current = current.right;
-	      } else { done = true; }
+	      context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
 	    }
-	  }
-	  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;
-	};
+	    _lastLoc = loc;
+	  } // Uses `actionConnect.disabled()` to know whether this connection is ok..
 
 
-	SplayTree.prototype.min = function min () {
-	  var node = this.minNode(this._root);
-	  if (node) { return node.key; }
-	  else    { return null; }
-	};
+	  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;
+	    } // can we connect to it?
 
-	SplayTree.prototype.max = function max () {
-	  var node = this.maxNode(this._root);
-	  if (node) { return node.key; }
-	  else    { return null; }
-	};
 
-	SplayTree.prototype.isEmpty = function isEmpty () { return this._root === null; };
-	prototypeAccessors.size.get = function () { return this._size; };
+	    var ids = [entity.id, target.id];
+	    return actionConnect(ids).disabled(testGraph);
+	  }
 
+	  function hasInvalidGeometry(entity, graph) {
+	    var parents = graph.parentWays(entity);
+	    var i, j, k;
 
-	/**
-	 * 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);
-	};
+	    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
 
-	Object.defineProperties( SplayTree.prototype, prototypeAccessors );
+	      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
 
-	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;
-	}
+	        for (k = 0; k < rings.length; k++) {
+	          nodes = rings[k].nodes;
 
+	          if (nodes.find(function (n) {
+	            return n.id === entity.id;
+	          })) {
+	            activeIndex = k;
 
-	function sort(keys, values, left, right, compare) {
-	  if (left >= right) { return; }
+	            if (geoHasSelfIntersections(nodes, entity.id)) {
+	              return 'multipolygonMember';
+	            }
+	          }
 
-	  var pivot = keys[(left + right) >> 1];
-	  var i = left - 1;
-	  var j = right + 1;
+	          rings[k].coords = nodes.map(function (n) {
+	            return n.loc;
+	          });
+	        } // test active ring for intersections with other rings in the multipolygon
 
-	  while (true) {
-	    do { i++; } while (compare(keys[i], pivot) < 0);
-	    do { j--; } while (compare(keys[j], pivot) > 0);
-	    if (i >= j) { break; }
 
-	    var tmp = keys[i];
-	    keys[i] = keys[j];
-	    keys[j] = tmp;
+	        for (k = 0; k < rings.length; k++) {
+	          if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings
 
-	    tmp = values[i];
-	    values[i] = values[j];
-	    values[j] = tmp;
-	  }
+	          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.
 
-	  sort(keys, values,  left,     j, compare);
-	  sort(keys, values, j + 1, right, compare);
-	}
 
-	var NORMAL               = 0;
-	var NON_CONTRIBUTING     = 1;
-	var SAME_TRANSITION      = 2;
-	var DIFFERENT_TRANSITION = 3;
+	      if (activeIndex === null) {
+	        nodes = parent.nodes.map(function (nodeID) {
+	          return graph.entity(nodeID);
+	        });
 
-	var INTERSECTION = 0;
-	var UNION        = 1;
-	var DIFFERENCE   = 2;
-	var XOR          = 3;
+	        if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
+	          return parent.geometry(graph);
+	        }
+	      }
+	    }
 
-	/**
-	 * @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;
+	    return false;
+	  }
 
-	  // previous line segment in sweepline belongs to the same polygon
-	  } else {
-	    if (event.isSubject === prev.isSubject) {
-	      event.inOut      = !prev.inOut;
-	      event.otherInOut = prev.otherInOut;
+	  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());
 
-	    // previous line segment in sweepline belongs to the clipping polygon
+	    if (nudge) {
+	      startNudge(d3_event, entity, nudge);
 	    } else {
-	      event.inOut      = !prev.otherInOut;
-	      event.otherInOut = prev.isVertical() ? !prev.inOut : prev.inOut;
+	      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));
 	    }
 
-	    // compute prevInResult field
-	    if (prev) {
-	      event.prevInResult = (!inResult(prev, operation) || prev.isVertical())
-	        ? prev.prevInResult : prev;
+	    if (wasPoint) {
+	      context.enter(modeSelect(context, [entity.id]));
+	    } else {
+	      var reselection = _restoreSelectedIDs.filter(function (id) {
+	        return context.graph().hasEntity(id);
+	      });
+
+	      if (reselection.length) {
+	        context.enter(modeSelect(context, reselection));
+	      } else {
+	        context.enter(modeBrowse(context));
+	      }
 	    }
 	  }
 
-	  // 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;
-	  }
-	}
+	  function _actionBounceBack(nodeID, toLoc) {
+	    var moveNode = actionMoveNode(nodeID, toLoc);
 
+	    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);
+	    };
 
-	/* 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:
-	          return true;
-	      }
-	      break;
-	    case SAME_TRANSITION:
-	      return operation === INTERSECTION || operation === UNION;
-	    case DIFFERENT_TRANSITION:
-	      return operation === DIFFERENCE;
-	    case NON_CONTRIBUTING:
-	      return false;
+	    action.transitionable = true;
+	    return action;
 	  }
-	  return false;
-	}
-	/* eslint-enable indent */
-
-
-	function determineResultTransition(event, operation) {
-	  var thisIn = !event.inOut;
-	  var thatIn = !event.otherInOut;
 
-	  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;
-	      }
-	      break;
+	  function cancel() {
+	    drag.cancel();
+	    context.enter(modeBrowse(context));
 	  }
-	  return isIn ? +1 : -1;
-	}
 
-	var SweepEvent = function SweepEvent (point, left, otherEvent, isSubject, edgeType) {
+	  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);
 
-	  /**
-	   * Is left endpoint?
-	   * @type {Boolean}
-	   */
-	  this.left = left;
+	  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);
+	  };
 
-	  /**
-	   * @type {Array.<Number>}
-	   */
-	  this.point = point;
+	  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();
+	  };
 
-	  /**
-	   * Other edge reference
-	   * @type {SweepEvent}
-	   */
-	  this.otherEvent = otherEvent;
+	  mode.selectedIDs = function () {
+	    if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign
 
-	  /**
-	   * Belongs to source or clipping polygon
-	   * @type {Boolean}
-	   */
-	  this.isSubject = isSubject;
+	    return mode;
+	  };
 
-	  /**
-	   * Edge contribution type
-	   * @type {Number}
-	   */
-	  this.type = edgeType || NORMAL;
+	  mode.activeID = function () {
+	    if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign
 
+	    return mode;
+	  };
 
-	  /**
-	   * In-out transition for the sweepline crossing polygon
-	   * @type {Boolean}
-	   */
-	  this.inOut = false;
+	  mode.restoreSelectedIDs = function (_) {
+	    if (!arguments.length) return _restoreSelectedIDs;
+	    _restoreSelectedIDs = _;
+	    return mode;
+	  };
 
+	  mode.behavior = drag;
+	  return mode;
+	}
 
-	  /**
-	   * @type {Boolean}
-	   */
-	  this.otherInOut = false;
+	// 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 */ });
+	});
 
-	  /**
-	   * Previous event in result?
-	   * @type {SweepEvent}
-	   */
-	  this.prevInResult = null;
+	// `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
+	    );
+	  }
+	});
 
-	  /**
-	   * Type of result transition (0 = not in result, +1 = out-in, -1, in-out)
-	   * @type {Number}
-	   */
-	  this.resultTransition = 0;
+	// patch native Promise.prototype for native async functions
+	if ( typeof nativePromiseConstructor == 'function' && !nativePromiseConstructor.prototype['finally']) {
+	  redefine(nativePromiseConstructor.prototype, 'finally', getBuiltIn('Promise').prototype['finally']);
+	}
 
-	  // connection step
+	// @@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;
+	    }
+	  ];
+	});
 
-	  /**
-	   * @type {Number}
-	   */
-	  this.otherPos = -1;
+	function quickselect$1(arr, k, left, right, compare) {
+	  quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+	}
 
-	  /**
-	   * @type {Number}
-	   */
-	  this.outputContourId = -1;
+	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--;
 
-	  this.isExteriorRing = true; // TODO: Looks unused, remove?
-	};
+	      while (compare(arr[i], t) < 0) {
+	        i++;
+	      }
 
-	var prototypeAccessors$1 = { inResult: { configurable: true } };
+	      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;
+	  }
+	}
 
-	/**
-	 * @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;
-	};
+	function swap$1(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;
+	}
 
-	/**
-	 * @param{Array.<Number>}p
-	 * @return {Boolean}
-	 */
-	SweepEvent.prototype.isAbove = function isAbove (p) {
-	  return !this.isBelow(p);
-	};
+	var RBush = /*#__PURE__*/function () {
+	  function RBush() {
+	    var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;
 
+	    _classCallCheck(this, RBush);
 
-	/**
-	 * @return {Boolean}
-	 */
-	SweepEvent.prototype.isVertical = function isVertical () {
-	  return this.point[0] === this.otherEvent.point[0];
-	};
+	    // 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();
+	  }
 
+	  _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;
 
-	/**
-	 * Does event belong to result?
-	 * @return {Boolean}
-	 */
-	prototypeAccessors$1.inResult.get = function () {
-	  return this.resultTransition !== 0;
-	};
+	          if (intersects(bbox, childBBox)) {
+	            if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
+	          }
+	        }
 
+	        node = nodesToSearch.pop();
+	      }
 
-	SweepEvent.prototype.clone = function clone () {
-	  var copy = new SweepEvent(
-	    this.point, this.left, this.otherEvent, this.isSubject, this.type);
+	      return result;
+	    }
+	  }, {
+	    key: "collides",
+	    value: function collides(bbox) {
+	      var node = this.data;
+	      if (!intersects(bbox, node)) return false;
+	      var nodesToSearch = [];
 
-	  copy.contourId      = this.contourId;
-	  copy.resultTransition = this.resultTransition;
-	  copy.prevInResult   = this.prevInResult;
-	  copy.isExteriorRing = this.isExteriorRing;
-	  copy.inOut          = this.inOut;
-	  copy.otherInOut     = this.otherInOut;
+	      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 copy;
-	};
+	          if (intersects(bbox, childBBox)) {
+	            if (node.leaf || contains(bbox, childBBox)) return true;
+	            nodesToSearch.push(child);
+	          }
+	        }
 
-	Object.defineProperties( SweepEvent.prototype, prototypeAccessors$1 );
+	        node = nodesToSearch.pop();
+	      }
 
-	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;
-	// };
+	  }, {
+	    key: "load",
+	    value: function load(data) {
+	      if (!(data && data.length)) return this;
 
-	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 (data.length < this._minEntries) {
+	        for (var i = 0; i < data.length; i++) {
+	          this.insert(data[i]);
 	        }
-	    }
-	    if (Q !== 0 || hindex === 0) {
-	        h[hindex++] = Q;
-	    }
-	    return hindex;
-	}
-
-	function estimate(elen, e) {
-	    var Q = e[0];
-	    for (var i = 1; i < elen; i++) { Q += e[i]; }
-	    return Q;
-	}
-
-	function vec(n) {
-	    return new Float64Array(n);
-	}
 
-	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;
+	        return this;
+	      } // recursively build the tree with the given data from scratch using OMT algorithm
 
-	var B = vec(4);
-	var C1 = vec(8);
-	var C2 = vec(12);
-	var D = vec(16);
-	var u = vec(4);
 
-	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];
-	}
+	      var node = this._build(data.slice(), 0, data.length - 1, 0);
 
-	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 (!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
 
-	    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; }
+	        this._insert(node, this.data.height - node.height - 1, true);
+	      }
 
-	    return -orient2dadapt(ax, ay, bx, by, cx, cy, detsum);
-	}
+	      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);
 
-	/**
-	 * 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;
-	}
+	            this._condense(path);
 
-	/**
-	 * @param  {SweepEvent} e1
-	 * @param  {SweepEvent} e2
-	 * @return {Number}
-	 */
-	function compareEvents(e1, e2) {
-	  var p1 = e1.point;
-	  var p2 = e2.point;
+	            return this;
+	          }
+	        }
 
-	  // Different x-coordinate
-	  if (p1[0] > p2[0]) { return 1; }
-	  if (p1[0] < p2[0]) { return -1; }
+	        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
 
-	  // 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; }
+	      }
 
-	  return specialCases(e1, e2, p1);
-	}
+	      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 = [];
 
+	      while (node) {
+	        if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
+	        node = nodesToSearch.pop();
+	      }
 
-	/* 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; }
+	      return result;
+	    }
+	  }, {
+	    key: "_build",
+	    value: function _build(items, left, right, height) {
+	      var N = right - left + 1;
+	      var M = this._maxEntries;
+	      var node;
 
-	  // 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;
-	  }
+	      if (N <= M) {
+	        // reached leaf level; return leaf
+	        node = createNode(items.slice(left, right + 1));
+	        calcBBox(node, this.toBBox);
+	        return node;
+	      }
 
-	  return (!e1.isSubject && e2.isSubject) ? 1 : -1;
-	}
-	/* eslint-enable no-unused-vars */
+	      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
 
-	/**
-	 * @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);
+	        M = Math.ceil(N / Math.pow(M, height - 1));
+	      }
 
-	  /* eslint-disable no-console */
-	  if (equals(se.point, se.otherEvent.point)) {
-	    console.warn('what is that, a collapsed segment?', se);
-	  }
-	  /* eslint-enable no-console */
+	      node = createNode([]);
+	      node.leaf = false;
+	      node.height = height; // split the items into M mostly square tiles
 
-	  r.contourId = l.contourId = se.contourId;
+	      var N2 = Math.ceil(N / M);
+	      var N1 = N2 * Math.ceil(Math.sqrt(M));
+	      multiSelect(items, left, right, N1, this.compareMinX);
 
-	  // 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;
-	  }
+	      for (var i = left; i <= right; i += N1) {
+	        var right2 = Math.min(i + N1 - 1, right);
+	        multiSelect(items, i, right2, N2, this.compareMinY);
 
-	  // avoid a rounding error. The left event would be processed after the right event
-	  // if (compareEvents(se, r) > 0) {}
+	        for (var j = i; j <= right2; j += N2) {
+	          var right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
-	  se.otherEvent.otherEvent = l;
-	  se.otherEvent = r;
+	          node.children.push(this._build(items, j, right3, height - 1));
+	        }
+	      }
 
-	  queue.push(l);
-	  queue.push(r);
+	      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;
 
-	  return queue;
-	}
+	        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
 
-	//const EPS = 1e-9;
+	          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;
+	            }
+	          }
+	        }
 
-	/**
-	 * 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]);
-	}
+	        node = targetNode || node.children[0];
+	      }
 
-	/**
-	 * 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]);
-	}
+	      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
 
-	/**
-	 * 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 node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
-	  /* eslint-disable arrow-body-style */
 
-	  function toPoint(p, s, d) {
-	    return [
-	      p[0] + s * d[0],
-	      p[1] + s * d[1]
-	    ];
-	  }
+	      node.children.push(item);
+	      extend$1(node, bbox); // split on node overflow; propagate upwards if necessary
 
-	  /* eslint-enable arrow-body-style */
+	      while (level >= 0) {
+	        if (insertPath[level].children.length > this._maxEntries) {
+	          this._split(insertPath, level);
 
-	  // 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);
+	          level--;
+	        } else break;
+	      } // adjust bboxes along the insertion path
 
-	  // 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)];
-	  }
 
-	  // 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;
+	      this._adjustParentBBoxes(bbox, insertPath, level);
+	    } // split overflowed node into two
 
-	  if (sqrKross > 0 /* EPS * sqLenB * sqLenE */) {
-	  // Lines are just parallel, not the same. No overlap.
-	    return null;
-	  }
+	  }, {
+	    key: "_split",
+	    value: function _split(insertPath, level) {
+	      var node = insertPath[level];
+	      var M = node.children.length;
+	      var m = this._minEntries;
 
-	  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._chooseSplitAxis(node, m, M);
 
-	  // this is, essentially, the FindIntersection acting on floats from
-	  // Schneider & Eberly, just inlined into this function.
-	  if (smin <= 1 && smax >= 0) {
+	      var splitIndex = this._chooseSplitIndex(node, m, M);
 
-	    // overlap on an end point
-	    if (smin === 1) {
-	      return noEndpointTouch ? null : [toPoint(a1, smin > 0 ? smin : 0, va)];
+	      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);
 	    }
-
-	    if (smax === 0) {
-	      return noEndpointTouch ? null : [toPoint(a1, smax < 1 ? smax : 1, va)];
+	  }, {
+	    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;
 
-	    if (noEndpointTouch && smin === 0 && smax === 1) { return null; }
+	      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
 
-	    // 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)
-	    ];
-	  }
+	        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;
+	          }
+	        }
+	      }
 
-	  return null;
-	}
+	      return index || M - m;
+	    } // sorts node children by the best axis for split
 
-	/**
-	 * @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
-	  );
+	  }, {
+	    key: "_chooseSplitAxis",
+	    value: function _chooseSplitAxis(node, m, M) {
+	      var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
+	      var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
 
-	  var nintersections = inter ? inter.length : 0;
-	  if (nintersections === 0) { return 0; } // no intersection
+	      var xMargin = this._allDistMargin(node, m, M, compareMinX);
 
-	  // 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;
-	  }
+	      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
 
-	  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
-	  if (nintersections === 1) {
+	      if (xMargin < yMargin) node.children.sort(compareMinX);
+	    } // total margin of all possible split distributions where each node is at least m full
 
-	    // 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);
-	    }
+	  }, {
+	    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);
+	      }
 
-	    // 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);
+	      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);
+	      }
+
+	      return margin;
 	    }
-	    return 1;
-	  }
+	  }, {
+	    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);
+	      }
+	    }
+	  }]);
 
-	  // The line segments associated to se1 and se2 overlap
-	  var events        = [];
-	  var leftCoincide  = false;
-	  var rightCoincide = false;
+	  return RBush;
+	}();
 
-	  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 findItem(item, items, equalsFn) {
+	  if (!equalsFn) return items.indexOf(item);
 
-	  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);
+	  for (var i = 0; i < items.length; i++) {
+	    if (equalsFn(item, items[i])) return i;
 	  }
 
-	  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;
+	  return -1;
+	} // calculate node's bbox from bboxes of its children
 
-	    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 2;
-	  }
 
-	  // the line segments share the right endpoint
-	  if (rightCoincide) {
-	    divideSegment(events[0], events[1].point, queue);
-	    return 3;
-	  }
+	function calcBBox(node, toBBox) {
+	  distBBox(node, 0, node.children.length, toBBox, node);
+	} // min bounding rectangle of node children from k to p-1
 
-	  // 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;
-	  }
 
-	  // one line segment includes the other one
-	  divideSegment(events[0], events[1].point, queue);
-	  divideSegment(events[3].otherEvent, events[2].point, queue);
+	function distBBox(node, k, p, toBBox, destNode) {
+	  if (!destNode) destNode = createNode(null);
+	  destNode.minX = Infinity;
+	  destNode.minY = Infinity;
+	  destNode.maxX = -Infinity;
+	  destNode.maxY = -Infinity;
 
-	  return 3;
+	  for (var i = k; i < p; i++) {
+	    var child = node.children[i];
+	    extend$1(destNode, node.leaf ? toBBox(child) : child);
+	  }
+
+	  return destNode;
 	}
 
-	/**
-	 * @param  {SweepEvent} le1
-	 * @param  {SweepEvent} le2
-	 * @return {Number}
-	 */
-	function compareSegments(le1, le2) {
-	  if (le1 === le2) { return 0; }
+	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;
+	}
 
-	  // Segments are not collinear
-	  if (signedArea(le1.point, le1.otherEvent.point, le2.point) !== 0 ||
-	    signedArea(le1.point, le1.otherEvent.point, le2.otherEvent.point) !== 0) {
+	function compareNodeMinX(a, b) {
+	  return a.minX - b.minX;
+	}
 
-	    // 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; }
+	function compareNodeMinY(a, b) {
+	  return a.minY - b.minY;
+	}
 
-	    // 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 bboxArea(a) {
+	  return (a.maxX - a.minX) * (a.maxY - a.minY);
+	}
 
-	    // 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; }
+	function bboxMargin(a) {
+	  return a.maxX - a.minX + (a.maxY - a.minY);
+	}
 
-	    // 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 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));
+	}
 
-	  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; }
-	    }
-	  } else { // Segments are collinear, but belong to separate polygons
-	    return le1.isSubject ? -1 : 1;
-	  }
+	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);
+	}
 
-	  return compareEvents(le1, le2) === 1 ? 1 : -1;
+	function contains(a, b) {
+	  return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
 	}
 
-	function subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation) {
-	  var sweepLine = new SplayTree(compareSegments);
-	  var sortedEvents = [];
+	function intersects(a, b) {
+	  return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+	}
 
-	  var rightbound = Math.min(sbbox[2], cbbox[2]);
+	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 prev, next, begin;
 
-	  while (eventQueue.length !== 0) {
-	    var event = eventQueue.pop();
-	    sortedEvents.push(event);
+	function multiSelect(arr, left, right, n, compare) {
+	  var stack = [left, right];
 
-	    // optimization by bboxes for intersection and difference goes here
-	    if ((operation === INTERSECTION && event.point[0] > rightbound) ||
-	        (operation === DIFFERENCE   && event.point[0] > sbbox[2])) {
-	      break;
-	    }
+	  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);
+	  }
+	}
 
-	    if (event.left) {
-	      next  = prev = sweepLine.insert(event);
-	      begin = sweepLine.minNode();
+	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
 
-	      if (prev !== begin) { prev = sweepLine.prev(prev); }
-	      else                { prev = null; }
+	var _cache;
 
-	      next = sweepLine.next(next);
+	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 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);
-	        }
-	      }
+	function abortRequest(controller) {
+	  if (controller) {
+	    controller.abort();
+	  }
+	}
 
-	      if (prev) {
-	        if (possibleIntersection(prev.key, event, eventQueue) === 2) {
-	          var prevprev = prev;
-	          if (prevprev !== begin) { prevprev = sweepLine.prev(prevprev); }
-	          else                    { prevprev = null; }
+	function abortUnwantedRequests(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
-	          prevprevEvent = prevprev ? prevprev.key : null;
-	          computeFields(prevEvent, prevprevEvent, operation);
-	          computeFields(event,     prevEvent,     operation);
-	        }
-	      }
-	    } else {
-	      event = event.otherEvent;
-	      next = prev = sweepLine.find(event);
+	    if (!wanted) {
+	      abortRequest(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
+	    }
+	  });
+	}
 
-	      if (prev && next) {
+	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
 
-	        if (prev !== begin) { prev = sweepLine.prev(prev); }
-	        else                { prev = null; }
 
-	        next = sweepLine.next(next);
-	        sweepLine.remove(event);
+	function updateRtree(item, replace) {
+	  _cache.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	        if (next && prev) {
-	          possibleIntersection(prev.key, next.key, eventQueue);
-	        }
-	      }
-	    }
+	  if (replace) {
+	    _cache.rtree.insert(item);
 	  }
-	  return sortedEvents;
 	}
 
-	var Contour = function Contour() {
-	  this.points = [];
-	  this.holeIds = [];
-	  this.holeOf = null;
-	  this.depth = null;
-	};
+	function tokenReplacements(d) {
+	  if (!(d instanceof QAItem)) return;
+	  var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
+	  var replacements = {};
+	  var issueTemplate = _krData.errorTypes[d.whichType];
 
-	Contour.prototype.isExterior = function isExterior () {
-	  return this.holeOf == null;
-	};
+	  if (!issueTemplate) {
+	    /* eslint-disable no-console */
+	    console.log('No Template: ', d.whichType);
+	    console.log('  ', d.description);
+	    /* eslint-enable no-console */
 
-	/**
-	 * @param  {Array.<SweepEvent>} sortedEvents
-	 * @return {Array.<SweepEvent>}
-	 */
-	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;
-	      }
-	    }
-	  }
+	    return;
+	  } // some descriptions are just fixed text
 
 
-	  for (i = 0, len = resultEvents.length; i < len; i++) {
-	    event = resultEvents[i];
-	    event.otherPos = i;
-	  }
+	  if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured
 
-	  // 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 errorRegex = new RegExp(issueTemplate.regex, 'i');
+	  var errorMatch = errorRegex.exec(d.description);
 
-	  return resultEvents;
-	}
+	  if (!errorMatch) {
+	    /* eslint-disable no-console */
+	    console.log('Unmatched: ', d.whichType);
+	    console.log('  ', d.description);
+	    console.log('  ', errorRegex);
+	    /* eslint-enable no-console */
 
+	    return;
+	  }
 
-	/**
-	 * @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;
+	  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] : '';
 
-	  if (newPos < length)
-	    { p1 = resultEvents[newPos].point; }
+	    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();
 
-	  while (newPos < length && p1[0] === p[0] && p1[1] === p[1]) {
-	    if (!processed[newPos]) {
-	      return newPos;
-	    } else   {
-	      newPos++;
+	      if (_krData.localizeStrings[compare]) {
+	        // some replacement strings can be localized
+	        capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+	      }
 	    }
-	    p1 = resultEvents[newPos].point;
-	  }
-
-	  newPos = pos - 1;
 
-	  while (processed[newPos] && newPos > origPos) {
-	    newPos--;
+	    replacements['var' + i] = capture;
 	  }
 
-	  return newPos;
+	  return replacements;
 	}
 
+	function parseError(capture, idType) {
+	  var compare = capture.toLowerCase();
 
-	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;
-	      }
-	    } 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;
+	  if (_krData.localizeStrings[compare]) {
+	    // some replacement strings can be localized
+	    capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
 	  }
-	  return contour;
-	}
 
-	/**
-	 * @param  {Array.<SweepEvent>} sortedEvents
-	 * @return {Array.<*>} polygons
-	 */
-	function connectEdges(sortedEvents) {
-	  var i, len;
-	  var resultEvents = orderEvents(sortedEvents);
+	  switch (idType) {
+	    // link a string like "this node"
+	    case 'this':
+	      capture = linkErrorObject(capture);
+	      break;
+
+	    case 'url':
+	      capture = linkURL(capture);
+	      break;
+	    // link an entity ID
+
+	    case 'n':
+	    case 'w':
+	    case 'r':
+	      capture = linkEntity(idType + capture);
+	      break;
+	    // some errors have more complex ID lists/variance
 
-	  // "false"-filled array
-	  var processed = {};
-	  var contours = [];
+	    case '20':
+	      capture = parse20(capture);
+	      break;
 
-	  var loop = function (  ) {
+	    case '211':
+	      capture = parse211(capture);
+	      break;
 
-	    if (processed[i]) {
-	      return;
-	    }
+	    case '231':
+	      capture = parse231(capture);
+	      break;
 
-	    var contourId = contours.length;
-	    var contour = initializeContourFromContext(resultEvents[i], contours, contourId);
+	    case '294':
+	      capture = parse294(capture);
+	      break;
 
-	    // 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;
-	    };
+	    case '370':
+	      capture = parse370(capture);
+	      break;
+	  }
 
-	    var pos = i;
-	    var origPos = i;
+	  return capture;
 
-	    var initial = resultEvents[i].point;
-	    contour.points.push(initial);
+	  function linkErrorObject(d) {
+	    return "<a class=\"error_object_link\">".concat(d, "</a>");
+	  }
 
-	    /* eslint no-constant-condition: "off" */
-	    while (true) {
-	      markAsProcessed(pos);
+	  function linkEntity(d) {
+	    return "<a class=\"error_entity_link\">".concat(d, "</a>");
+	  }
 
-	      pos = resultEvents[pos].otherPos;
+	  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...
 
-	      markAsProcessed(pos);
-	      contour.points.push(resultEvents[pos].point);
 
-	      pos = nextPos(pos, resultEvents, processed, origPos);
+	  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)...
 
-	      if (pos == origPos) {
-	        break;
-	      }
-	    }
 
-	    contours.push(contour);
-	  };
+	  function parse231(capture) {
+	    var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'
 
-	  for (i = 0, len = resultEvents.length; i < len; i++) loop(  );
+	    var items = capture.split('),');
+	    items.forEach(function (item) {
+	      var match = item.match(/\#(\d+)\((.+)\)?/);
 
-	  return contours;
-	}
+	      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...
 
-	var tinyqueue = TinyQueue;
-	var _default$1 = TinyQueue;
 
-	function TinyQueue(data, compare) {
-	    if (!(this instanceof TinyQueue)) { return new TinyQueue(data, compare); }
+	  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
 
-	    this.data = data || [];
-	    this.length = this.data.length;
-	    this.compare = compare || defaultCompare$1;
+	      var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type
 
-	    if (this.length > 0) {
-	        for (var i = (this.length >> 1) - 1; i >= 0; i--) { this._down(i); }
-	    }
-	}
+	      var idType = item[1].slice(0, 1); // ID has # at the front
 
-	function defaultCompare$1(a, b) {
-	    return a < b ? -1 : a > b ? 1 : 0;
-	}
+	      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')"
 
-	TinyQueue.prototype = {
 
-	    push: function (item) {
-	        this.data.push(item);
-	        this.length++;
-	        this._up(this.length - 1);
-	    },
+	  function parse370(capture) {
+	    if (!capture) return '';
+	    var match = capture.match(/\(including the name (\'.+\')\)/);
 
-	    pop: function () {
-	        if (this.length === 0) { return undefined; }
+	    if (match && match.length) {
+	      return _t('QA.keepRight.errorTypes.370.including_the_name', {
+	        name: match[1]
+	      });
+	    }
 
-	        var top = this.data[0];
-	        this.length--;
+	    return '';
+	  } // arbitrary node list of form: #ID,#ID,#ID...
 
-	        if (this.length > 0) {
-	            this.data[0] = this.data[this.length];
-	            this._down(0);
-	        }
-	        this.data.pop();
 
-	        return top;
-	    },
+	  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(', ');
+	  }
+	}
 
-	    peek: function () {
-	        return this.data[0];
-	    },
+	var serviceKeepRight = {
+	  title: 'keepRight',
+	  init: function init() {
+	    _mainFileFetcher.get('keepRight').then(function (d) {
+	      return _krData = d;
+	    });
 
-	    _up: function (pos) {
-	        var data = this.data;
-	        var compare = this.compare;
-	        var item = data[pos];
+	    if (!_cache) {
+	      this.reset();
+	    }
 
-	        while (pos > 0) {
-	            var parent = (pos - 1) >> 1;
-	            var current = data[parent];
-	            if (compare(item, current) >= 0) { break; }
-	            data[pos] = current;
-	            pos = parent;
-	        }
+	    this.event = utilRebind(this, dispatch$1, 'on');
+	  },
+	  reset: function reset() {
+	    if (_cache) {
+	      Object.values(_cache.inflightTile).forEach(abortRequest);
+	    }
 
-	        data[pos] = item;
-	    },
+	    _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;
 
-	    _down: function (pos) {
-	        var data = this.data;
-	        var compare = this.compare;
-	        var halfLength = this.length >> 1;
-	        var item = data[pos];
+	    var options = {
+	      format: 'geojson',
+	      ch: _krRuleset
+	    }; // determine the needed tiles to cover the view
 
-	        while (pos < halfLength) {
-	            var left = (pos << 1) + 1;
-	            var right = left + 1;
-	            var best = data[left];
+	    var tiles = tiler.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	            if (right < this.length && compare(data[right], best) < 0) {
-	                left = right;
-	                best = data[right];
-	            }
-	            if (compare(best, item) >= 0) { break; }
+	    abortUnwantedRequests(_cache, tiles); // issue new requests..
 
-	            data[pos] = best;
-	            pos = left;
-	        }
+	    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;
 
-	        data[pos] = item;
-	    }
-	};
-	tinyqueue.default = _default$1;
+	            case '292':
+	            case '293':
+	              description = description.replace('A turn-', 'This turn-');
+	              break;
 
-	var max$2 = Math.max;
-	var min = Math.min;
+	            case '294':
+	            case '295':
+	            case '296':
+	            case '297':
+	            case '298':
+	              description = "This turn-restriction~".concat(description);
+	              break;
 
-	var contourId = 0;
+	            case '300':
+	              description = 'This highway is missing a maxspeed tag';
+	              break;
 
+	            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;
 
-	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;
+	          _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;
 
-	    if (s1[0] === s2[0] && s1[1] === s2[1]) {
-	      continue; // skip collapsed edges, or it breaks
+	    if (_cache.inflightPost[d.id]) {
+	      return callback({
+	        message: 'Error update already inflight',
+	        status: -2
+	      }, d);
 	    }
 
-	    e1.contourId = e2.contourId = depth;
-	    if (!isExteriorRing) {
-	      e1.isExteriorRing = false;
-	      e2.isExteriorRing = false;
-	    }
-	    if (compareEvents(e1, e2) > 0) {
-	      e2.left = true;
-	    } else {
-	      e1.left = true;
+	    var params = {
+	      schema: d.schema,
+	      id: d.id
+	    };
+
+	    if (d.newStatus) {
+	      params.st = d.newStatus;
 	    }
 
-	    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);
+	    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.
 
-	    // 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 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)
 
-	function fillQueue(subject, clipping, sbbox, cbbox, operation) {
-	  var eventQueue = new tinyqueue(null, compareEvents);
-	  var polygonSet, isExteriorRing, i, ii, j, jj; //, k, kk;
+	    d3_json(url, {
+	      signal: controller.signal
+	    })["finally"](function () {
+	      delete _cache.inflightPost[d.id];
 
-	  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 (d.newStatus === 'ignore') {
+	        // ignore permanently (false positive)
+	        _this2.removeItem(d);
+	      } else if (d.newStatus === 'ignore_t') {
+	        // ignore temporarily (error fixed)
+	        _this2.removeItem(d);
 
-	  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);
-	    }
-	  }
+	        _cache.closed["".concat(d.schema, ":").concat(d.id)] = true;
+	      } else {
+	        d = _this2.replaceItem(d.update({
+	          comment: d.newComment,
+	          newComment: undefined,
+	          newState: undefined
+	        }));
+	      }
 
-	  return eventQueue;
-	}
+	      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
 
-	var EMPTY = [];
+	    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();
+	  }
+	};
+
+	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;
 
-	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;
+	function abortRequest$1(i) {
+	  Object.values(i).forEach(function (controller) {
+	    if (controller) {
+	      controller.abort();
 	    }
-	  }
-	  return result;
+	  });
 	}
 
+	function abortUnwantedRequests$1(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
-	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);
+	    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
 
-	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 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');
-
-	  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');
 
-	  // console.time('connect vertices');
-	  var contours = connectEdges(sortedEvents);
-	  //console.timeEnd('connect vertices');
+	function updateRtree$1(item, replace) {
+	  _cache$1.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	  // 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);
-	    }
+	  if (replace) {
+	    _cache$1.rtree.insert(item);
 	  }
-
-	  return polygons;
 	}
 
-	function union (subject, clipping) {
-	  return boolean(subject, clipping, UNION);
+	function linkErrorObject(d) {
+	  return "<a class=\"error_object_link\">".concat(d, "</a>");
 	}
 
-	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];
-
-	  i += d;
-
-	  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) {}
+	function linkEntity(d) {
+	  return "<a class=\"error_entity_link\">".concat(d, "</a>");
+	}
 
-	  if (e === 0) {
-	    e = 1 - eBias;
-	  } else if (e === eMax) {
-	    return m ? NaN : ((s ? -1 : 1) * Infinity)
+	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 {
-	    m = m + Math.pow(2, mLen);
-	    e = e - eBias;
+	    return [0, 0];
 	  }
-	  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
-	};
-
-	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 (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 (e + eBias >= 1) {
-	      value += rt / c;
-	    } else {
-	      value += rt * Math.pow(2, 1 - eBias);
-	    }
-	    if (value * c >= 2) {
-	      e++;
-	      c /= 2;
-	    }
+	function relativeBearing(p1, p2) {
+	  var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
 
-	    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;
-	    }
-	  }
+	  if (angle < 0) {
+	    angle += 2 * Math.PI;
+	  } // Return degrees
 
-	  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
-	  e = (e << mLen) | m;
-	  eLen += mLen;
-	  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+	  return angle * 180 / Math.PI;
+	} // Assuming range [0,360)
 
-	  buffer[offset + i - d] |= s * 128;
-	};
 
-	var ieee754 = {
-		read: read$6,
-		write: write$6
-	};
+	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
 
-	var pbf = Pbf;
 
+	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);
 
-	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 loc;
 	}
 
-	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
-
-	var SHIFT_LEFT_32 = (1 << 16) * (1 << 16),
-	    SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32;
+	var serviceImproveOSM = {
+	  title: 'improveOSM',
+	  init: function init() {
+	    _mainFileFetcher.get('qa_data').then(function (d) {
+	      return _impOsmData = d.improveOSM;
+	    });
 
-	// 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');
+	    if (!_cache$1) {
+	      this.reset();
+	    }
 
-	Pbf.prototype = {
+	    this.event = utilRebind(this, dispatch$2, 'on');
+	  },
+	  reset: function reset() {
+	    if (_cache$1) {
+	      Object.values(_cache$1.inflightTile).forEach(abortRequest$1);
+	    }
 
-	    destroy: function() {
-	        this.buf = null;
-	    },
+	    _cache$1 = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush()
+	    };
+	  },
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
 
-	    // === READING =================================================================
+	    var options = {
+	      client: 'iD',
+	      status: 'OPEN',
+	      zoom: '19' // Use a high zoom so that clusters aren't returned
 
-	    readFields: function(readField, result, end) {
-	        end = end || this.length;
+	    }; // determine the needed tiles to cover the view
 
-	        while (this.pos < end) {
-	            var val = this.readVarint(),
-	                tag = val >> 3,
-	                startPos = this.pos;
+	    var tiles = tiler$1.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	            this.type = val & 0x7;
-	            readField(tag, result, this);
+	    abortUnwantedRequests$1(_cache$1, tiles); // issue new requests..
 
-	            if (this.pos === startPos) { this.skip(val); }
-	        }
-	        return result;
-	    },
+	    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
 
-	    readMessage: function(readField, result) {
-	        return this.readFields(readField, result, this.readVarint() + this.pos);
-	    },
+	      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
 
-	    readFixed32: function() {
-	        var val = readUInt32(this.buf, this.pos);
-	        this.pos += 4;
-	        return val;
-	    },
+	              if (numberOfTrips === -1) {
+	                d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
+	              }
 
-	    readSFixed32: function() {
-	        var val = readInt32(this.buf, this.pos);
-	        this.pos += 4;
-	        return val;
-	    },
+	              _cache$1.data[d.id] = d;
 
-	    // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
+	              _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];
 
-	    readFixed64: function() {
-	        var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
-	        this.pos += 8;
-	        return val;
-	    },
+	          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;
 
-	    readSFixed64: function() {
-	        var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
-	        this.pos += 8;
-	        return val;
-	    },
+	    // If comments already retrieved no need to do so again
+	    if (item.comments) {
+	      return Promise.resolve(item);
+	    }
 
-	    readFloat: function() {
-	        var val = ieee754.read(this.buf, this.pos, true, 23, 4);
-	        this.pos += 4;
-	        return val;
-	    },
+	    var key = item.issueKey;
+	    var qParams = {};
 
-	    readDouble: function() {
-	        var val = ieee754.read(this.buf, this.pos, true, 52, 8);
-	        this.pos += 8;
-	        return val;
-	    },
+	    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;
+	    }
 
-	    readVarint: function(isSigned) {
-	        var buf = this.buf,
-	            val, b;
+	    var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);
 
-	        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 cacheComments = function cacheComments(data) {
+	      // Assign directly for immediate use afterwards
+	      // comments are served newest to oldest
+	      item.comments = data.comments ? data.comments.reverse() : [];
 
-	        return readVarintRemainder(val, isSigned, this);
-	    },
+	      _this2.replaceItem(item);
+	    };
 
-	    readVarint64: function() { // for compatibility with v2.0.1
-	        return this.readVarint(true);
-	    },
+	    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);
+	    }
 
-	    readSVarint: function() {
-	        var num = this.readVarint();
-	        return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
-	    },
+	    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
 
-	    readBoolean: function() {
-	        return Boolean(this.readVarint());
-	    },
 
-	    readString: function() {
-	        var end = this.readVarint() + this.pos;
-	        var pos = this.pos;
-	        this.pos = end;
+	    serviceOsm.userDetails(sendPayload.bind(this));
 
-	        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
-	        return readUtf8(this.buf, pos, end);
-	    },
+	    function sendPayload(err, user) {
+	      var _this3 = this;
 
-	    readBytes: function() {
-	        var end = this.readVarint() + this.pos,
-	            buffer = this.buf.subarray(this.pos, end);
-	        this.pos = end;
-	        return buffer;
-	    },
+	      if (err) {
+	        return callback(err, d);
+	      }
 
-	    // verbose for performance reasons; doesn't affect gzipped size
+	      var key = d.issueKey;
+	      var url = "".concat(_impOsmUrls[key], "/comment");
+	      var payload = {
+	        username: user.display_name,
+	        targetIds: [d.identifier]
+	      };
 
-	    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;
-	    },
+	      if (d.newStatus) {
+	        payload.status = d.newStatus;
+	        payload.text = 'status changed';
+	      } // Comment take place of default text
 
-	    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); }
-	    },
 
-	    // === WRITING =================================================================
+	      if (d.newComment) {
+	        payload.text = d.newComment;
+	      }
 
-	    writeTag: function(tag, type) {
-	        this.writeVarint((tag << 3) | type);
-	    },
+	      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
+	          });
 
-	    realloc: function(min) {
-	        var length = this.length || 16;
+	          _this3.replaceItem(d.update({
+	            comments: comments,
+	            newComment: undefined
+	          }));
+	        } else {
+	          _this3.removeItem(d);
 
-	        while (length < this.pos + min) { length *= 2; }
+	          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;
+	            }
 
-	        if (length !== this.length) {
-	            var buf = new Uint8Array(length);
-	            buf.set(this.buf);
-	            this.buf = buf;
-	            this.length = length;
+	            _cache$1.closed[d.issueKey] += 1;
+	          }
 	        }
-	    },
-
-	    finish: function() {
-	        this.length = this.pos;
-	        this.pos = 0;
-	        return this.buf.subarray(0, this.length);
-	    },
 
-	    writeFixed32: function(val) {
-	        this.realloc(4);
-	        writeInt32(this.buf, val, this.pos);
-	        this.pos += 4;
-	    },
+	        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
 
-	    writeSFixed32: function(val) {
-	        this.realloc(4);
-	        writeInt32(this.buf, val, this.pos);
-	        this.pos += 4;
-	    },
+	    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;
+	  }
+	};
 
-	    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;
-	    },
+	var quot = /"/g;
 
-	    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;
-	    },
+	// 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 + '>';
+	};
 
-	    writeVarint: function(val) {
-	        val = +val || 0;
+	// 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;
+	  });
+	};
 
-	        if (val > 0xfffffff || val < 0) {
-	            writeBigVarint(val, this);
-	            return;
-	        }
+	// `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);
+	  }
+	});
 
-	        this.realloc(4);
+	var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;
 
-	        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(val) {
-	        this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
-	    },
 
-	    writeBoolean: function(val) {
-	        this.writeVarint(Boolean(val));
-	    },
 
-	    writeString: function(str) {
-	        str = String(str);
-	        this.realloc(str.length * 4);
 
-	        this.pos++; // reserve 1 byte for short string length
 
-	        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;
+	var nativeEndsWith = ''.endsWith;
+	var min$8 = Math.min;
 
-	        if (len >= 0x80) { makeRoomForExtraLength(startPos, len, this); }
+	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;
+	}();
 
-	        // finally, write the message length in the reserved place and restore the position
-	        this.pos = startPos - 1;
-	        this.writeVarint(len);
-	        this.pos += len;
-	    },
+	// `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;
+	  }
+	});
 
-	    writeFloat: function(val) {
-	        this.realloc(4);
-	        ieee754.write(this.buf, val, this.pos, true, 23, 4);
-	        this.pos += 4;
-	    },
+	var getOwnPropertyDescriptor$5 = objectGetOwnPropertyDescriptor.f;
 
-	    writeDouble: function(val) {
-	        this.realloc(8);
-	        ieee754.write(this.buf, val, this.pos, true, 52, 8);
-	        this.pos += 8;
-	    },
 
-	    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]; }
-	    },
 
-	    writeRawMessage: function(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;
-	    },
+	var nativeStartsWith = ''.startsWith;
+	var min$9 = Math.min;
 
-	    writeMessage: function(tag, fn, obj) {
-	        this.writeTag(tag, Pbf.Bytes);
-	        this.writeRawMessage(fn, obj);
-	    },
+	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;
+	}();
 
-	    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));
-	    }
-	};
+	// `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;
+	  }
+	});
 
-	function readVarintRemainder(l, s, p) {
-	    var buf = p.buf,
-	        h, b;
+	var $trimEnd = stringTrim.end;
 
-	    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');
-	}
+	var FORCED$e = stringTrimForced('trimEnd');
 
-	function readPackedEnd(pbf) {
-	    return pbf.type === Pbf.Bytes ?
-	        pbf.readVarint() + pbf.pos : pbf.pos + 1;
-	}
+	var trimEnd = FORCED$e ? function trimEnd() {
+	  return $trimEnd(this);
+	} : ''.trimEnd;
 
-	function toNum(low, high, isSigned) {
-	    if (isSigned) {
-	        return high * 0x100000000 + (low >>> 0);
-	    }
+	// `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
+	});
 
-	    return ((high >>> 0) * 0x100000000) + (low >>> 0);
-	}
+	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
+	  };
+	});
 
-	function writeBigVarint(val, pbf) {
-	    var low, high;
+	/**
+	 * Helpers
+	 */
+	var escapeTest = /[&<>"']/;
+	var escapeReplace = /[&<>"']/g;
+	var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
+	var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
+	var escapeReplacements = {
+	  '&': '&amp;',
+	  '<': '&lt;',
+	  '>': '&gt;',
+	  '"': '&quot;',
+	  "'": '&#39;'
+	};
 
-	    if (val >= 0) {
-	        low  = (val % 0x100000000) | 0;
-	        high = (val / 0x100000000) | 0;
-	    } else {
-	        low  = ~(-val % 0x100000000);
-	        high = ~(-val / 0x100000000);
+	var getEscapeReplacement = function getEscapeReplacement(ch) {
+	  return escapeReplacements[ch];
+	};
 
-	        if (low ^ 0xffffffff) {
-	            low = (low + 1) | 0;
-	        } else {
-	            low = 0;
-	            high = (high + 1) | 0;
-	        }
+	function escape$1(html, encode) {
+	  if (encode) {
+	    if (escapeTest.test(html)) {
+	      return html.replace(escapeReplace, getEscapeReplacement);
 	    }
-
-	    if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
-	        throw new Error('Given varint doesn\'t fit into 10 bytes');
+	  } else {
+	    if (escapeTestNoEncode.test(html)) {
+	      return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
 	    }
+	  }
 
-	    pbf.realloc(10);
-
-	    writeBigVarintLow(low, high, pbf);
-	    writeBigVarintHigh(high, pbf);
+	  return html;
 	}
 
-	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;
-	}
+	var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
 
-	function writeBigVarintHigh(high, pbf) {
-	    var lsb = (high & 0x07) << 4;
+	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));
+	    }
 
-	    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 '';
+	  });
 	}
 
-	function makeRoomForExtraLength(startPos, len, pbf) {
-	    var extraLen =
-	        len <= 0x3fff ? 1 :
-	        len <= 0x1fffff ? 2 :
-	        len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7));
+	var caret = /(^|[^\[])\^/g;
 
-	    // 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 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;
 	}
 
-	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]); } }
-
-	// Buffer code below from https://github.com/feross/buffer, MIT-licensed
+	var nonWordAndColonTest = /[^\w:]/g;
+	var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
 
-	function readUInt32(buf, pos) {
-	    return ((buf[pos]) |
-	        (buf[pos + 1] << 8) |
-	        (buf[pos + 2] << 16)) +
-	        (buf[pos + 3] * 0x1000000);
-	}
+	function cleanUrl(sanitize, base, href) {
+	  if (sanitize) {
+	    var prot;
 
-	function writeInt32(buf, val, pos) {
-	    buf[pos] = val;
-	    buf[pos + 1] = (val >>> 8);
-	    buf[pos + 2] = (val >>> 16);
-	    buf[pos + 3] = (val >>> 24);
-	}
+	    try {
+	      prot = decodeURIComponent(unescape$1(href)).replace(nonWordAndColonTest, '').toLowerCase();
+	    } catch (e) {
+	      return null;
+	    }
 
-	function readInt32(buf, pos) {
-	    return ((buf[pos]) |
-	        (buf[pos + 1] << 8) |
-	        (buf[pos + 2] << 16)) +
-	        (buf[pos + 3] << 24);
-	}
+	    if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
+	      return null;
+	    }
+	  }
 
-	function readUtf8(buf, pos, end) {
-	    var str = '';
-	    var i = pos;
+	  if (base && !originIndependentUrl.test(href)) {
+	    href = resolveUrl(base, href);
+	  }
 
-	    while (i < end) {
-	        var b0 = buf[i];
-	        var c = null; // codepoint
-	        var bytesPerSequence =
-	            b0 > 0xEF ? 4 :
-	            b0 > 0xDF ? 3 :
-	            b0 > 0xBF ? 2 : 1;
+	  try {
+	    href = encodeURI(href).replace(/%25/g, '%');
+	  } catch (e) {
+	    return null;
+	  }
 
-	        if (i + bytesPerSequence > end) { break; }
+	  return href;
+	}
 
-	        var b1, b2, b3;
+	var baseUrls = {};
+	var justDomain = /^[^:]+:\/*[^/]*$/;
+	var protocol = /^([^:]+:)[\s\S]*$/;
+	var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
 
-	        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 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);
+	    }
+	  }
 
-	        if (c === null) {
-	            c = 0xFFFD;
-	            bytesPerSequence = 1;
+	  base = baseUrls[' ' + base];
+	  var relativeBase = base.indexOf(':') === -1;
 
-	        } else if (c > 0xFFFF) {
-	            c -= 0x10000;
-	            str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
-	            c = 0xDC00 | c & 0x3FF;
-	        }
+	  if (href.substring(0, 2) === '//') {
+	    if (relativeBase) {
+	      return href;
+	    }
 
-	        str += String.fromCharCode(c);
-	        i += bytesPerSequence;
+	    return base.replace(protocol, '$1') + href;
+	  } else if (href.charAt(0) === '/') {
+	    if (relativeBase) {
+	      return href;
 	    }
 
-	    return str;
+	    return base.replace(domain, '$1') + href;
+	  } else {
+	    return base + href;
+	  }
 	}
 
-	function readUtf8TextDecoder(buf, pos, end) {
-	    return utf8TextDecoder.decode(buf.subarray(pos, end));
-	}
+	var noopTest = {
+	  exec: function noopTest() {}
+	};
 
-	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 merge$1(obj) {
+	  var i = 1,
+	      target,
+	      key;
 
-	        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;
-	        }
+	  for (; i < arguments.length; i++) {
+	    target = arguments[i];
+
+	    for (key in target) {
+	      if (Object.prototype.hasOwnProperty.call(target, key)) {
+	        obj[key] = target[key];
+	      }
 	    }
-	    return pos;
+	  }
+
+	  return obj;
 	}
 
-	var pointGeometry = Point;
+	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;
 
-	/**
-	 * 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;
-	}
+	    while (--curr >= 0 && str[curr] === '\\') {
+	      escaped = !escaped;
+	    }
 
-	Point.prototype = {
+	    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;
 
-	    /**
-	     * 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 (cells.length > count) {
+	    cells.splice(count);
+	  } else {
+	    while (cells.length < count) {
+	      cells.push('');
+	    }
+	  }
 
-	    /**
-	     * 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); },
+	  for (; i < cells.length; i++) {
+	    // leading or trailing whitespace is ignored per the gfm spec
+	    cells[i] = cells[i].trim().replace(/\\\|/g, '|');
+	  }
 
-	    /**
-	     * 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); },
+	  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.
 
-	    /**
-	     * 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); },
 
-	    /**
-	     * 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); },
+	function rtrim$1(str, c, invert) {
+	  var l = str.length;
 
-	    /**
-	     * 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 (l === 0) {
+	    return '';
+	  } // Length of suffix matching the invert condition.
 
-	    /**
-	     * 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); },
 
-	    /**
-	     * 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); },
+	  var suffLen = 0; // Step left until we fail to match the invert condition.
 
-	    /**
-	     * 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); },
+	  while (suffLen < l) {
+	    var currChar = str.charAt(l - suffLen - 1);
 
-	    /**
-	     * 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 (currChar === c && !invert) {
+	      suffLen++;
+	    } else if (currChar !== c && invert) {
+	      suffLen++;
+	    } else {
+	      break;
+	    }
+	  }
 
-	    /**
-	     * 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(); },
+	  return str.substr(0, l - suffLen);
+	}
 
-	    /**
-	     * 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(); },
+	function findClosingBracket(str, b) {
+	  if (str.indexOf(b[1]) === -1) {
+	    return -1;
+	  }
 
-	    /**
-	     * Return a version of this point with the x & y coordinates
-	     * rounded to integers.
-	     * @return {Point} rounded point
-	     */
-	    round:   function() { return this.clone()._round(); },
+	  var l = str.length;
+	  var level = 0,
+	      i = 0;
 
-	    /**
-	     * 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);
-	    },
+	  for (; i < l; i++) {
+	    if (str[i] === '\\') {
+	      i++;
+	    } else if (str[i] === b[0]) {
+	      level++;
+	    } else if (str[i] === b[1]) {
+	      level--;
 
-	    /**
-	     * 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;
-	    },
+	      if (level < 0) {
+	        return i;
+	      }
+	    }
+	  }
 
-	    /**
-	     * 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));
-	    },
+	  return -1;
+	}
 
-	    /**
-	     * 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;
-	    },
+	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
 
-	    /**
-	     * 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);
-	    },
 
-	    /**
-	     * 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);
-	    },
+	function repeatString(pattern, count) {
+	  if (count < 1) {
+	    return '';
+	  }
 
-	    /**
-	     * 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);
-	    },
+	  var result = '';
 
-	    /*
-	     * 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);
-	    },
+	  while (count > 1) {
+	    if (count & 1) {
+	      result += pattern;
+	    }
 
-	    _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;
-	    },
+	    count >>= 1;
+	    pattern += pattern;
+	  }
 
-	    _add: function(p) {
-	        this.x += p.x;
-	        this.y += p.y;
-	        return this;
-	    },
+	  return result + pattern;
+	}
 
-	    _sub: function(p) {
-	        this.x -= p.x;
-	        this.y -= p.y;
-	        return this;
-	    },
+	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
+	};
 
-	    _mult: function(k) {
-	        this.x *= k;
-	        this.y *= k;
-	        return this;
-	    },
+	var defaults$1 = defaults.defaults;
+	var rtrim$2 = helpers.rtrim,
+	    splitCells$1 = helpers.splitCells,
+	    _escape = helpers.escape,
+	    findClosingBracket$1 = helpers.findClosingBracket;
 
-	    _div: function(k) {
-	        this.x /= k;
-	        this.y /= k;
-	        return this;
-	    },
+	function outputLink(cap, link, raw) {
+	  var href = link.href;
+	  var title = link.title ? _escape(link.title) : null;
+	  var text = cap[1].replace(/\\([\[\]])/g, '$1');
 
-	    _multByPoint: function(p) {
-	        this.x *= p.x;
-	        this.y *= p.y;
-	        return this;
-	    },
+	  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)
+	    };
+	  }
+	}
 
-	    _divByPoint: function(p) {
-	        this.x /= p.x;
-	        this.y /= p.y;
-	        return this;
-	    },
+	function indentCodeCompensation(raw, text) {
+	  var matchIndentToCode = raw.match(/^(\s+)(?:```)/);
 
-	    _unit: function() {
-	        this._div(this.mag());
-	        return this;
-	    },
+	  if (matchIndentToCode === null) {
+	    return text;
+	  }
 
-	    _perp: function() {
-	        var y = this.y;
-	        this.y = this.x;
-	        this.x = -y;
-	        return this;
-	    },
+	  var indentToCode = matchIndentToCode[1];
+	  return text.split('\n').map(function (node) {
+	    var matchIndentInNode = node.match(/^\s+/);
 
-	    _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;
-	    },
+	    if (matchIndentInNode === null) {
+	      return node;
+	    }
 
-	    _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;
-	    },
+	    var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
+	        indentInNode = _matchIndentInNode[0];
 
-	    _round: function() {
-	        this.x = Math.round(this.x);
-	        this.y = Math.round(this.y);
-	        return this;
+	    if (indentInNode.length >= indentToCode.length) {
+	      return node.slice(indentToCode.length);
 	    }
-	};
 
+	    return node;
+	  }).join('\n');
+	}
 	/**
-	 * 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);
+	 * Tokenizer
 	 */
-	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; }
-	}
+	var Tokenizer_1 = /*#__PURE__*/function () {
+	  function Tokenizer(options) {
+	    _classCallCheck(this, Tokenizer);
 
-	function readTag(pbf, feature) {
-	    var end = pbf.readVarint() + pbf.pos;
+	    this.options = options || defaults$1;
+	  }
 
-	    while (pbf.pos < end) {
-	        var key = feature._keys[pbf.readVarint()],
-	            value = feature._values[pbf.readVarint()];
-	        feature.properties[key] = value;
-	    }
-	}
+	  _createClass(Tokenizer, [{
+	    key: "space",
+	    value: function space(src) {
+	      var cap = this.rules.block.newline.exec(src);
 
-	VectorTileFeature.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
+	      if (cap) {
+	        if (cap[0].length > 1) {
+	          return {
+	            type: 'space',
+	            raw: cap[0]
+	          };
+	        }
 
-	VectorTileFeature.prototype.loadGeometry = function() {
-	    var pbf = this._pbf;
-	    pbf.pos = this._geometry;
+	        return {
+	          raw: '\n'
+	        };
+	      }
+	    }
+	  }, {
+	    key: "code",
+	    value: function code(src, tokens) {
+	      var cap = this.rules.block.code.exec(src);
 
-	    var end = pbf.readVarint() + pbf.pos,
-	        cmd = 1,
-	        length = 0,
-	        x = 0,
-	        y = 0,
-	        lines = [],
-	        line;
+	      if (cap) {
+	        var lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.
 
-	    while (pbf.pos < end) {
-	        if (length <= 0) {
-	            var cmdLen = pbf.readVarint();
-	            cmd = cmdLen & 0x7;
-	            length = cmdLen >> 3;
+	        if (lastToken && lastToken.type === 'paragraph') {
+	          return {
+	            raw: cap[0],
+	            text: cap[0].trimRight()
+	          };
 	        }
 
-	        length--;
+	        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);
+
+	      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 (cmd === 1 || cmd === 2) {
-	            x += pbf.readSVarint();
-	            y += pbf.readSVarint();
+	      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]
+	        };
 
-	            if (cmd === 1) { // moveTo
-	                if (line) { lines.push(line); }
-	                line = [];
+	        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;
 	            }
+	          }
 
-	            line.push(new pointGeometry(x, y));
-
-	        } else if (cmd === 7) {
+	          l = item.cells.length;
 
-	            // Workaround for https://github.com/mapbox/mapnik-vector-tile/issues/90
-	            if (line) {
-	                line.push(line[0].clone()); // closePolygon
-	            }
+	          for (i = 0; i < l; i++) {
+	            item.cells[i] = splitCells$1(item.cells[i], item.header.length);
+	          }
 
-	        } else {
-	            throw new Error('unknown command ' + cmd);
+	          return item;
 	        }
+	      }
 	    }
+	  }, {
+	    key: "hr",
+	    value: function hr(src) {
+	      var cap = this.rules.block.hr.exec(src);
 
-	    if (line) { lines.push(line); }
-
-	    return lines;
-	};
+	      if (cap) {
+	        return {
+	          type: 'hr',
+	          raw: cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "blockquote",
+	    value: function blockquote(src) {
+	      var cap = this.rules.block.blockquote.exec(src);
 
-	VectorTileFeature.prototype.bbox = function() {
-	    var pbf = this._pbf;
-	    pbf.pos = this._geometry;
+	      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;
+	          }
 
-	    var end = pbf.readVarint() + pbf.pos,
-	        cmd = 1,
-	        length = 0,
-	        x = 0,
-	        y = 0,
-	        x1 = Infinity,
-	        x2 = -Infinity,
-	        y1 = Infinity,
-	        y2 = -Infinity;
+	          if (loose) {
+	            list.loose = true;
+	          } // Check for task list items
 
-	    while (pbf.pos < end) {
-	        if (length <= 0) {
-	            var cmdLen = pbf.readVarint();
-	            cmd = cmdLen & 0x7;
-	            length = cmdLen >> 3;
-	        }
 
-	        length--;
+	          istask = /^\[[ xX]\] /.test(item);
+	          ischecked = undefined;
 
-	        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; }
+	          if (istask) {
+	            ischecked = item[1] !== ' ';
+	            item = item.replace(/^\[[ xX]\] +/, '');
+	          }
 
-	        } else if (cmd !== 7) {
-	            throw new Error('unknown command ' + cmd);
+	          list.items.push({
+	            type: 'list_item',
+	            raw: raw,
+	            task: istask,
+	            checked: ischecked,
+	            loose: loose,
+	            text: item
+	          });
 	        }
-	    }
 
-	    return [x1, y1, x2, y2];
-	};
+	        return list;
+	      }
+	    }
+	  }, {
+	    key: "html",
+	    value: function html(src) {
+	      var cap = this.rules.block.html.exec(src);
 
-	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;
+	      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);
 
-	    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 (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') : []
+	        };
 
-	    switch (this.type) {
-	    case 1:
-	        var points = [];
-	        for (i = 0; i < coords.length; i++) {
-	            points[i] = coords[i][0];
-	        }
-	        coords = points;
-	        project(coords);
-	        break;
+	        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;
+	            }
+	          }
 
-	    case 2:
-	        for (i = 0; i < coords.length; i++) {
-	            project(coords[i]);
-	        }
-	        break;
+	          l = item.cells.length;
 
-	    case 3:
-	        coords = classifyRings(coords);
-	        for (i = 0; i < coords.length; i++) {
-	            for (j = 0; j < coords[i].length; j++) {
-	                project(coords[i][j]);
-	            }
+	          for (i = 0; i < l; i++) {
+	            item.cells[i] = splitCells$1(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
+	          }
+
+	          return item;
 	        }
-	        break;
+	      }
 	    }
+	  }, {
+	    key: "lheading",
+	    value: function lheading(src) {
+	      var cap = this.rules.block.lheading.exec(src);
 
-	    if (coords.length === 1) {
-	        coords = coords[0];
-	    } else {
-	        type = 'Multi' + type;
+	      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);
 
-	    var result = {
-	        type: "Feature",
-	        geometry: {
-	            type: type,
-	            coordinates: coords
-	        },
-	        properties: this.properties
-	    };
+	      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);
 
-	    if ('id' in this) {
-	        result.id = this.id;
+	      if (cap) {
+	        var lastToken = tokens[tokens.length - 1];
+
+	        if (lastToken && lastToken.type === 'text') {
+	          return {
+	            raw: cap[0],
+	            text: cap[0]
+	          };
+	        }
+
+	        return {
+	          type: 'text',
+	          raw: cap[0],
+	          text: cap[0]
+	        };
+	      }
 	    }
+	  }, {
+	    key: "escape",
+	    value: function escape(src) {
+	      var cap = this.rules.inline.escape.exec(src);
 
-	    return result;
-	};
+	      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);
 
-	// classifies an array of rings into polygons with outer rings and holes
+	      if (cap) {
+	        if (!inLink && /^<a /i.test(cap[0])) {
+	          inLink = true;
+	        } else if (inLink && /^<\/a>/i.test(cap[0])) {
+	          inLink = false;
+	        }
 
-	function classifyRings(rings) {
-	    var len = rings.length;
+	        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;
+	        }
 
-	    if (len <= 1) { return [rings]; }
+	        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);
 
-	    var polygons = [],
-	        polygon,
-	        ccw;
+	      if (cap) {
+	        var lastParenIndex = findClosingBracket$1(cap[2], '()');
 
-	    for (var i = 0; i < len; i++) {
-	        var area = signedArea$1(rings[i]);
-	        if (area === 0) { continue; }
+	        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] = '';
+	        }
 
-	        if (ccw === undefined) { ccw = area < 0; }
+	        var href = cap[2];
+	        var title = '';
 
-	        if (ccw === area < 0) {
-	            if (polygon) { polygons.push(polygon); }
-	            polygon = [rings[i]];
+	        if (this.options.pedantic) {
+	          var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
 
+	          if (link) {
+	            href = link[1];
+	            title = link[3];
+	          } else {
+	            title = '';
+	          }
 	        } else {
-	            polygon.push(rings[i]);
+	          title = cap[3] ? cap[3].slice(1, -1) : '';
 	        }
-	    }
-	    if (polygon) { polygons.push(polygon); }
-
-	    return polygons;
-	}
 
-	function signedArea$1(ring) {
-	    var sum = 0;
-	    for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
-	        p1 = ring[i];
-	        p2 = ring[j];
-	        sum += (p2.x - p1.x) * (p1.y + p2.y);
+	        href = href.trim().replace(/^<([\s\S]*)>$/, '$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;
+	      }
 	    }
-	    return sum;
-	}
+	  }, {
+	    key: "reflink",
+	    value: function reflink(src, links) {
+	      var cap;
 
-	var vectortilelayer = VectorTileLayer;
+	      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()];
 
-	function VectorTileLayer(pbf, end) {
-	    // Public
-	    this.version = 1;
-	    this.name = null;
-	    this.extent = 4096;
-	    this.length = 0;
+	        if (!link || !link.href) {
+	          var text = cap[0].charAt(0);
+	          return {
+	            type: 'text',
+	            raw: text,
+	            text: text
+	          };
+	        }
 
-	    // Private
-	    this._pbf = pbf;
-	    this._keys = [];
-	    this._values = [];
-	    this._features = [];
+	        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);
 
-	    pbf.readFields(readLayer, this, end);
+	      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;
 
-	    this.length = this._features.length;
-	}
+	        while ((match = endReg.exec(maskedSrc)) != null) {
+	          cap = this.rules.inline.strong.middle.exec(maskedSrc.slice(0, match.index + 3));
 
-	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)); }
-	}
+	          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);
 
-	function readValueMessage(pbf) {
-	    var value = null,
-	        end = pbf.readVarint() + pbf.pos;
+	      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;
 
-	    while (pbf.pos < end) {
-	        var tag = pbf.readVarint() >> 3;
+	        while ((match = endReg.exec(maskedSrc)) != null) {
+	          cap = this.rules.inline.em.middle.exec(maskedSrc.slice(0, match.index + 2));
 
-	        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;
+	          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);
 
-	    return value;
-	}
+	      if (cap) {
+	        var text = cap[2].replace(/\n/g, ' ');
+	        var hasNonSpaceChars = /[^ ]/.test(text);
+	        var hasSpaceCharsOnBothEnds = text.startsWith(' ') && text.endsWith(' ');
 
-	// 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'); }
+	        if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
+	          text = text.substring(1, text.length - 1);
+	        }
 
-	    this._pbf.pos = this._features[i];
+	        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 end = this._pbf.readVarint() + this._pbf.pos;
-	    return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
-	};
+	      if (cap) {
+	        return {
+	          type: 'br',
+	          raw: cap[0]
+	        };
+	      }
+	    }
+	  }, {
+	    key: "del",
+	    value: function del(src) {
+	      var cap = this.rules.inline.del.exec(src);
 
-	var vectortile = VectorTile;
+	      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);
 
-	function VectorTile(pbf, end) {
-	    this.layers = pbf.readFields(readTile, {}, end);
-	}
+	      if (cap) {
+	        var text, href;
 
-	function readTile(tag, layers, pbf) {
-	    if (tag === 3) {
-	        var layer = new vectortilelayer(pbf, pbf.readVarint() + pbf.pos);
-	        if (layer.length) { layers[layer.name] = layer; }
-	    }
-	}
+	        if (cap[2] === '@') {
+	          text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
+	          href = 'mailto:' + text;
+	        } else {
+	          text = _escape(cap[1]);
+	          href = text;
+	        }
 
-	var VectorTile$1 = vectortile;
-	var VectorTileFeature$1 = vectortilefeature;
-	var VectorTileLayer$1 = vectortilelayer;
+	        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;
 
-	var vectorTile = {
-		VectorTile: VectorTile$1,
-		VectorTileFeature: VectorTileFeature$1,
-		VectorTileLayer: VectorTileLayer$1
-	};
+	      if (cap = this.rules.inline.url.exec(src)) {
+	        var text, href;
 
-	var tiler$7 = utilTiler().tileSize(512).margin(1);
-	var dispatch$8 = dispatch('loadedData');
-	var _vtCache;
+	        if (cap[2] === '@') {
+	          text = _escape(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]);
 
-	function abortRequest$7(controller) {
-	    controller.abort();
-	}
+	          text = _escape(cap[0]);
 
+	          if (cap[1] === 'www.') {
+	            href = 'http://' + text;
+	          } else {
+	            href = text;
+	          }
+	        }
 
-	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];
-	                }
+	        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);
 
-	                // 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
-	                }
+	      if (cap) {
+	        var text;
 
-	                // 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];
-	                    }
-	                }
-	            }
+	        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]);
 	        }
-	    });
 
-	    return features;
-	}
+	        return {
+	          type: 'text',
+	          raw: cap[0],
+	          text: text
+	        };
+	      }
+	    }
+	  }]);
 
+	  return Tokenizer;
+	}();
 
-	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 noopTest$1 = helpers.noopTest,
+	    edit$1 = helpers.edit,
+	    merge$2 = helpers.merge;
+	/**
+	 * 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]+/
+	};
+	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
+	 */
 
-	    var controller = new AbortController();
-	    source.inflight[tile.id] = controller;
+	block.normal = merge$2({}, block);
+	/**
+	 * GFM Block Grammar
+	 */
 
-	    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');
-	            }
+	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
 
-	            var z = tile.xyz[2];
-	            if (!source.canMerge[z]) {
-	                source.canMerge[z] = {};  // initialize mergeCache
-	            }
+	});
+	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)
+	 */
 
-	            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];
-	        });
-	}
+	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
+	 */
 
+	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)
 
-	var serviceVectorTile = {
+	  },
+	  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)
 
-	    init: function() {
-	        if (!_vtCache) {
-	            this.reset();
-	        }
+	  },
+	  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
+	 */
 
-	        this.event = utilRebind(this, dispatch$8, 'on');
-	    },
+	inline.normal = merge$2({}, inline);
+	/**
+	 * Pedantic Inline Grammar
+	 */
 
+	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
+	 */
 
-	    reset: function() {
-	        for (var sourceID in _vtCache) {
-	            var source = _vtCache[sourceID];
-	            if (source && source.inflight) {
-	                Object.values(source.inflight).forEach(abortRequest$7);
-	            }
-	        }
+	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
+	 */
 
-	        _vtCache = {};
-	    },
+	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
+	};
 
+	var defaults$2 = defaults.defaults;
+	var block$1 = rules.block,
+	    inline$1 = rules.inline;
+	var repeatString$1 = helpers.repeatString;
+	/**
+	 * smartypants text replacement
+	 */
 
-	    addSource: function(sourceID, template) {
-	        _vtCache[sourceID] = { template: template, inflight: {}, loaded: {}, canMerge: {} };
-	        return _vtCache[sourceID];
-	    },
+	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
+	 */
 
 
-	    data: function(sourceID, projection) {
-	        var source = _vtCache[sourceID];
-	        if (!source) { return []; }
+	function mangle(text) {
+	  var out = '',
+	      i,
+	      ch;
+	  var l = text.length;
 
-	        var tiles = tiler$7.getTiles(projection);
-	        var seen = {};
-	        var results = [];
+	  for (i = 0; i < l; i++) {
+	    ch = text.charCodeAt(i);
 
-	        for (var i = 0; i < tiles.length; i++) {
-	            var features = source.loaded[tiles[i].id];
-	            if (!features || !features.length) { continue; }
+	    if (Math.random() > 0.5) {
+	      ch = 'x' + ch.toString(16);
+	    }
 
-	            for (var j = 0; j < features.length; j++) {
-	                var feature = features[j];
-	                var hash = feature.__featurehash__;
-	                if (seen[hash]) { continue; }
-	                seen[hash] = true;
+	    out += '&#' + ch + ';';
+	  }
 
-	                // 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 out;
+	}
+	/**
+	 * Block Lexer
+	 */
 
-	        return results;
-	    },
 
+	var Lexer_1 = /*#__PURE__*/function () {
+	  function Lexer(options) {
+	    _classCallCheck(this, Lexer);
 
-	    loadTiles: function(sourceID, template, projection) {
-	        var source = _vtCache[sourceID];
-	        if (!source) {
-	            source = this.addSource(sourceID, template);
-	        }
+	    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
+	    };
 
-	        var tiles = tiler$7.getTiles(projection);
+	    if (this.options.pedantic) {
+	      rules.block = block$1.pedantic;
+	      rules.inline = inline$1.pedantic;
+	    } else if (this.options.gfm) {
+	      rules.block = block$1.gfm;
 
-	        // 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];
-	            }
-	        });
+	      if (this.options.breaks) {
+	        rules.inline = inline$1.breaks;
+	      } else {
+	        rules.inline = inline$1.gfm;
+	      }
+	    }
 
-	        tiles.forEach(function(tile) {
-	            loadTile(source, tile);
-	        });
-	    },
+	    this.tokenizer.rules = rules;
+	  }
+	  /**
+	   * Expose Rules
+	   */
 
 
-	    cache: function() {
-	        return _vtCache;
+	  _createClass(Lexer, [{
+	    key: "lex",
+
+	    /**
+	     * 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);
+	          }
 
-	var apibase$5 = 'https://www.wikidata.org/w/api.php?';
-	var _wikidataCache = {};
+	          continue;
+	        } // code
 
 
-	var serviceWikidata = {
+	        if (token = this.tokenizer.code(src, tokens)) {
+	          src = src.substring(token.raw.length);
 
-	    init: function() {},
+	          if (token.type) {
+	            tokens.push(token);
+	          } else {
+	            lastToken = tokens[tokens.length - 1];
+	            lastToken.raw += '\n' + token.raw;
+	            lastToken.text += '\n' + token.text;
+	          }
 
-	    reset: function() {
-	        _wikidataCache = {};
-	    },
+	          continue;
+	        } // fences
 
 
-	    // Search for Wikidata items matching the query
-	    itemsForSearchQuery: function(query, callback) {
-	        if (!query) {
-	            if (callback) { callback('No query', {}); }
-	            return;
-	        }
+	        if (token = this.tokenizer.fences(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // heading
 
-	        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, {}); }
-	            });
-	    },
+	        if (token = this.tokenizer.heading(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // table no leading pipe (gfm)
 
 
-	    // 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;
-	        }
+	        if (token = this.tokenizer.nptable(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // hr
 
-	        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: '*'
-	        });
 
-	        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, {}); }
-	            });
-	    },
+	        if (token = this.tokenizer.hr(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // blockquote
 
 
-	    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'
-	        ]);
-	    },
+	        if (token = this.tokenizer.blockquote(src)) {
+	          src = src.substring(token.raw.length);
+	          token.tokens = this.blockTokens(token.text, [], top);
+	          tokens.push(token);
+	          continue;
+	        } // list
 
 
-	    entityByQID: function(qid, callback) {
-	        if (!qid) {
-	            callback('No qid', {});
-	            return;
-	        }
-	        if (_wikidataCache[qid]) {
-	            if (callback) { callback(null, _wikidataCache[qid]); }
-	            return;
-	        }
+	        if (token = this.tokenizer.list(src)) {
+	          src = src.substring(token.raw.length);
+	          l = token.items.length;
 
-	        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: '*'
-	        });
+	          for (i = 0; i < l; i++) {
+	            token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
+	          }
 
-	        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, {}); }
-	            });
-	    },
+	          tokens.push(token);
+	          continue;
+	        } // html
 
 
-	    // 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;
-	            }
+	        if (token = this.tokenizer.html(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // def
+
 
-	            var i;
-	            var description;
-	            if (entity.descriptions && Object.keys(entity.descriptions).length > 0) {
-	                description = entity.descriptions[Object.keys(entity.descriptions)[0]].value;
-	            }
+	        if (top && (token = this.tokenizer.def(src))) {
+	          src = src.substring(token.raw.length);
 
-	            // prepare result
-	            var result = {
-	                title: entity.id,
-	                description: description,
-	                editURL: 'https://www.wikidata.org/wiki/' + entity.id
+	          if (!this.tokens.links[token.tag]) {
+	            this.tokens.links[token.tag] = {
+	              href: token.href,
+	              title: token.title
 	            };
+	          }
 
-	            // 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;
-	                        }
-	                    }
-	                }
-	            }
+	          continue;
+	        } // table (gfm)
 
-	            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;
-	                    }
-	                }
-	            }
 
-	            callback(null, result);
-	        });
-	    }
+	        if (token = this.tokenizer.table(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // lheading
 
-	};
 
-	var endpoint = 'https://en.wikipedia.org/w/api.php?';
+	        if (token = this.tokenizer.lheading(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // top-level paragraph
 
-	var serviceWikipedia = {
 
-	    init: function() {},
-	    reset: function() {},
+	        if (top && (token = this.tokenizer.paragraph(src))) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // text
 
 
-	    search: function(lang, query, callback) {
-	        if (!query) {
-	            if (callback) { callback('No Query', []); }
-	            return;
-	        }
+	        if (token = this.tokenizer.text(src, tokens)) {
+	          src = src.substring(token.raw.length);
 
-	        lang = lang || 'en';
-	        var url = endpoint.replace('en', lang) +
-	            utilQsString({
-	                action: 'query',
-	                list: 'search',
-	                srlimit: '10',
-	                srinfo: 'suggestion',
-	                format: 'json',
-	                origin: '*',
-	                srsearch: query
-	            });
+	          if (token.type) {
+	            tokens.push(token);
+	          } else {
+	            lastToken = tokens[tokens.length - 1];
+	            lastToken.raw += '\n' + token.raw;
+	            lastToken.text += '\n' + token.text;
+	          }
 
-	        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, []); }
-	            });
-	    },
+	          continue;
+	        }
 
+	        if (src) {
+	          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
 
-	    suggestions: function(lang, query, callback) {
-	        if (!query) {
-	            if (callback) { callback('', []); }
-	            return;
+	          if (this.options.silent) {
+	            console.error(errMsg);
+	            break;
+	          } else {
+	            throw new Error(errMsg);
+	          }
 	        }
+	      }
 
-	        lang = lang || 'en';
-	        var url = endpoint.replace('en', lang) +
-	            utilQsString({
-	                action: 'opensearch',
-	                namespace: 0,
-	                suggest: '',
-	                format: 'json',
-	                origin: '*',
-	                search: query
-	            });
+	      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;
+	            }
 
-	        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, []); }
-	            });
-	    },
+	          case 'table':
+	            {
+	              token.tokens = {
+	                header: [],
+	                cells: []
+	              }; // header
 
+	              l2 = token.header.length;
 
-	    translations: function(lang, title, callback) {
-	        if (!title) {
-	            if (callback) { callback('No Title'); }
-	            return;
-	        }
+	              for (j = 0; j < l2; j++) {
+	                token.tokens.header[j] = [];
+	                this.inlineTokens(token.header[j], token.tokens.header[j]);
+	              } // cells
 
-	        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');
-	                }
-	                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); }
-	            });
-	    }
+	              l2 = token.cells.length;
 
-	};
+	              for (j = 0; j < l2; j++) {
+	                row = token.cells[j];
+	                token.tokens.cells[j] = [];
 
-	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
-	};
+	                for (k = 0; k < row.length; k++) {
+	                  token.tokens.cells[j][k] = [];
+	                  this.inlineTokens(row[k], token.tokens.cells[j][k]);
+	                }
+	              }
 
-	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);
-	    };
-	}
+	              break;
+	            }
 
-	function uiNoteComments() {
-	    var _note;
+	          case 'blockquote':
+	            {
+	              this.inline(token.tokens);
+	              break;
+	            }
 
+	          case 'list':
+	            {
+	              l2 = token.items.length;
 
-	    function noteComments(selection) {
-	        if (_note.isNew()) { return; } // don't draw .comments-container
+	              for (j = 0; j < l2; j++) {
+	                this.inline(token.items[j].tokens);
+	              }
 
-	        var comments = selection.selectAll('.comments-container')
-	            .data([0]);
+	              break;
+	            }
+	        }
+	      }
 
-	        comments = comments.enter()
-	            .append('div')
-	            .attr('class', 'comments-container')
-	            .merge(comments);
+	      return tokens;
+	    }
+	    /**
+	     * Lexing/Compiling
+	     */
 
-	        var commentEnter = comments.selectAll('.comment')
-	            .data(_note.comments)
-	            .enter()
-	            .append('div')
-	            .attr('class', 'comment');
+	  }, {
+	    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
 
-	        commentEnter
-	            .append('div')
-	            .attr('class', function(d) { return 'comment-avatar user-' + d.uid; })
-	            .call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+	      var maskedSrc = src;
+	      var match; // Mask out reflinks
 
-	        var mainEnter = commentEnter
-	            .append('div')
-	            .attr('class', 'comment-main');
+	      if (this.tokens.links) {
+	        var links = Object.keys(this.tokens.links);
 
-	        var metadataEnter = mainEnter
-	            .append('div')
-	            .attr('class', 'comment-metadata');
+	        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
 
-	        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'); });
-	            });
 
-	        metadataEnter
-	            .append('div')
-	            .attr('class', 'comment-date')
-	            .text(function(d) {
-	                return _t('note.status.' + d.action, { when: localeDateString(d.date) });
-	            });
+	      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);
+	      }
 
-	        mainEnter
-	            .append('div')
-	            .attr('class', 'comment-text')
-	            .html(function(d) { return d.html; });
+	      while (src) {
+	        // escape
+	        if (token = this.tokenizer.escape(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // tag
 
-	        comments
-	            .call(replaceAvatars);
-	    }
 
+	        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
 
-	    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; }
-	        });
+	        if (token = this.tokenizer.link(src)) {
+	          src = src.substring(token.raw.length);
 
-	        Object.keys(uids).forEach(function(uid) {
-	            osm.loadUser(uid, function(err, user) {
-	                if (!user || !user.image_url) { return; }
+	          if (token.type === 'link') {
+	            token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+	          }
 
-	                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);
-	            });
-	        });
-	    }
+	          tokens.push(token);
+	          continue;
+	        } // reflink, nolink
 
 
-	    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);
-	    }
+	        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);
+	          }
 
-	    noteComments.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteComments;
-	    };
+	          tokens.push(token);
+	          continue;
+	        } // strong
 
 
-	    return noteComments;
-	}
+	        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 uiNoteHeader() {
-	    var _note;
 
+	        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
 
-	    function noteHeader(selection) {
-	        var header = selection.selectAll('.note-header')
-	            .data(
-	                (_note ? [_note] : []),
-	                function(d) { return d.status + d.id; }
-	            );
 
-	        header.exit()
-	            .remove();
+	        if (token = this.tokenizer.codespan(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // br
 
-	        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; });
+	        if (token = this.tokenizer.br(src)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // del (gfm)
 
-	        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')
-	            .text(function(d) {
-	                if (_note.isNew()) { return _t('note.new'); }
-	                return _t('note.note') + ' ' + d.id + ' ' +
-	                    (d.status === 'closed' ? _t('note.closed') : '');
-	            });
-	    }
+	        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
 
 
-	    noteHeader.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteHeader;
-	    };
+	        if (token = this.tokenizer.autolink(src, mangle)) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // url (gfm)
 
 
-	    return noteHeader;
-	}
+	        if (!inLink && (token = this.tokenizer.url(src, mangle))) {
+	          src = src.substring(token.raw.length);
+	          tokens.push(token);
+	          continue;
+	        } // text
 
-	function uiNoteReport() {
-	    var _note;
 
-	    function noteReport(selection) {
-	        var url;
-	        if (services.osm && (_note instanceof osmNote) && (!_note.isNew())) {
-	            url = services.osm.noteReportURL(_note);
+	        if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
+	          src = src.substring(token.raw.length);
+	          prevChar = token.raw.slice(-1);
+	          tokens.push(token);
+	          continue;
 	        }
 
-	        var link = selection.selectAll('.note-report')
-	            .data(url ? [url] : []);
+	        if (src) {
+	          var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+
+	          if (this.options.silent) {
+	            console.error(errMsg);
+	            break;
+	          } else {
+	            throw new Error(errMsg);
+	          }
+	        }
+	      }
 
-	        // exit
-	        link.exit()
-	            .remove();
+	      return tokens;
+	    }
+	  }], [{
+	    key: "lex",
 
-	        // 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'));
+	    /**
+	     * Static Lex Method
+	     */
+	    value: function lex(src, options) {
+	      var lexer = new Lexer(options);
+	      return lexer.lex(src);
+	    }
+	    /**
+	     * Static Lex Inline Method
+	     */
 
-	        linkEnter
-	            .append('span')
-	            .text(_t('note.report'));
+	  }, {
+	    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;
+	}();
 
-	    noteReport.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteReport;
-	    };
+	var defaults$3 = defaults.defaults;
+	var cleanUrl$1 = helpers.cleanUrl,
+	    escape$2 = helpers.escape;
+	/**
+	 * Renderer
+	 */
 
-	    return noteReport;
-	}
+	var Renderer_1 = /*#__PURE__*/function () {
+	  function Renderer(options) {
+	    _classCallCheck(this, Renderer);
 
-	function uiViewOnOSM(context) {
-	    var _what;   // an osmEntity or osmNote
+	    this.options = options || defaults$3;
+	  }
 
+	  _createClass(Renderer, [{
+	    key: "code",
+	    value: function code(_code, infostring, escaped) {
+	      var lang = (infostring || '').match(/\S*/)[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 (this.options.highlight) {
+	        var out = this.options.highlight(_code, lang);
+
+	        if (out != null && out !== _code) {
+	          escaped = true;
+	          _code = out;
 	        }
+	      }
 
-	        var data = ((!_what || _what.isNew()) ? [] : [_what]);
-	        var link = selection.selectAll('.view-on-osm')
-	            .data(data, function(d) { return d.id; });
+	      if (!lang) {
+	        return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+	      }
 
-	        // exit
-	        link.exit()
-	            .remove();
+	      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
 
-	        // 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'));
 
-	        linkEnter
-	            .append('span')
-	            .text(_t('inspector.view_on_osm'));
+	      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
 
+	  }, {
+	    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);
 
-	    viewOnOSM.what = function(_) {
-	        if (!arguments.length) { return _what; }
-	        _what = _;
-	        return viewOnOSM;
-	    };
+	      if (href === null) {
+	        return text;
+	      }
 
-	    return viewOnOSM;
-	}
+	      var out = '<a href="' + escape$2(href) + '"';
 
-	function uiNoteEditor(context) {
-	    var dispatch$1 = dispatch('change');
-	    var noteComments = uiNoteComments();
-	    var noteHeader = uiNoteHeader();
+	      if (title) {
+	        out += ' title="' + title + '"';
+	      }
 
-	    // var formFields = uiFormFields(context);
+	      out += '>' + text + '</a>';
+	      return out;
+	    }
+	  }, {
+	    key: "image",
+	    value: function image(href, title, text) {
+	      href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
 
-	    var _note;
-	    var _newNote;
-	    // var _fieldsArr;
+	      if (href === null) {
+	        return text;
+	      }
 
+	      var out = '<img src="' + href + '" alt="' + text + '"';
 
-	    function noteEditor(selection) {
+	      if (title) {
+	        out += ' title="' + title + '"';
+	      }
 
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	      out += this.options.xhtml ? '/>' : '>';
+	      return out;
+	    }
+	  }, {
+	    key: "text",
+	    value: function text(_text) {
+	      return _text;
+	    }
+	  }]);
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL');
+	  return Renderer;
+	}();
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() {
-	                context.enter(modeBrowse(context));
-	            })
-	            .call(svgIcon('#iD-icon-close'));
+	/**
+	 * TextRenderer
+	 * returns only the textual part of the token
+	 */
+	var TextRenderer_1 = /*#__PURE__*/function () {
+	  function TextRenderer() {
+	    _classCallCheck(this, TextRenderer);
+	  }
 
-	        headerEnter
-	            .append('h3')
-	            .text(_t('note.title'));
+	  _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 '';
+	    }
+	  }]);
 
+	  return TextRenderer;
+	}();
 
-	        var body = selection.selectAll('.body')
-	            .data([0]);
+	/**
+	 * Slugger generates header id
+	 */
+	var Slugger_1 = /*#__PURE__*/function () {
+	  function Slugger() {
+	    _classCallCheck(this, Slugger);
 
-	        body = body.enter()
-	            .append('div')
-	            .attr('class', 'body')
-	            .merge(body);
+	    this.seen = {};
+	  }
 
-	        var editor = body.selectAll('.note-editor')
-	            .data([0]);
+	  _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
+	     */
 
-	        editor.enter()
-	            .append('div')
-	            .attr('class', 'modal-section note-editor')
-	            .merge(editor)
-	            .call(noteHeader.note(_note))
-	            .call(noteComments.note(_note))
-	            .call(noteSaveSection);
+	  }, {
+	    key: "getNextSafeSlug",
+	    value: function getNextSafeSlug(originalSlug, isDryRun) {
+	      var slug = originalSlug;
+	      var occurenceAccumulator = 0;
 
-	        var footer = selection.selectAll('.footer')
-	            .data([0]);
+	      if (this.seen.hasOwnProperty(slug)) {
+	        occurenceAccumulator = this.seen[originalSlug];
 
-	        footer.enter()
-	            .append('div')
-	            .attr('class', 'footer')
-	            .merge(footer)
-	            .call(uiViewOnOSM(context).what(_note))
-	            .call(uiNoteReport().note(_note));
+	        do {
+	          occurenceAccumulator++;
+	          slug = originalSlug + '-' + occurenceAccumulator;
+	        } while (this.seen.hasOwnProperty(slug));
+	      }
 
+	      if (!isDryRun) {
+	        this.seen[originalSlug] = occurenceAccumulator;
+	        this.seen[slug] = 0;
+	      }
 
-	        // rerender the note editor on any auth change
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.on('change.note-save', function() {
-	                selection.call(noteEditor);
-	            });
-	        }
+	      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);
+	    }
+	  }]);
 
-	    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; });
+	  return Slugger;
+	}();
 
-	        // exit
-	        noteSave.exit()
-	            .remove();
+	var defaults$4 = defaults.defaults;
+	var unescape$2 = helpers.unescape;
+	/**
+	 * Parsing & Compiling
+	 */
 
-	        // 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 Parser_1 = /*#__PURE__*/function () {
+	  function Parser(options) {
+	    _classCallCheck(this, Parser);
 
-	        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);
+	    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
+	   */
 
-	        if (_newNote) {
-	            // autofocus the comment field for new notes
-	            commentTextarea.node().focus();
-	        }
 
-	        // update
-	        noteSave = noteSaveEnter
-	            .merge(noteSave)
-	            .call(userDetails)
-	            .call(noteSaveButtons);
+	  _createClass(Parser, [{
+	    key: "parse",
 
+	    /**
+	     * 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;
+	            }
 
-	        // fast submit if user presses cmd+enter
-	        function keydown() {
-	            if (!(event.keyCode === 13 && event.metaKey)) { return; }
+	          case 'hr':
+	            {
+	              out += this.renderer.hr();
+	              continue;
+	            }
 
-	            var osm = services.osm;
-	            if (!osm) { return; }
+	          case 'heading':
+	            {
+	              out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$2(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
+	              continue;
+	            }
 
-	            var hasAuth = osm.authenticated();
-	            if (!hasAuth) { return; }
+	          case 'code':
+	            {
+	              out += this.renderer.code(token.text, token.lang, token.escaped);
+	              continue;
+	            }
 
-	            if (!_note.newComment) { return; }
+	          case 'table':
+	            {
+	              header = ''; // header
 
-	            event.preventDefault();
+	              cell = '';
+	              l2 = token.header.length;
 
-	            select(this)
-	                .on('keydown.note-input', null);
+	              for (j = 0; j < l2; j++) {
+	                cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
+	                  header: true,
+	                  align: token.align[j]
+	                });
+	              }
 
-	            // 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);
-	        }
+	              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;
 
-	        function changeInput() {
-	            var input = select(this);
-	            var val = input.property('value').trim() || undefined;
+	                for (k = 0; k < l3; k++) {
+	                  cell += this.renderer.tablecell(this.parseInline(row[k]), {
+	                    header: false,
+	                    align: token.align[k]
+	                  });
+	                }
 
-	            // store the unsaved comment with the note itself
-	            _note = _note.update({ newComment: val });
+	                body += this.renderer.tablerow(cell);
+	              }
 
-	            var osm = services.osm;
-	            if (osm) {
-	                osm.replaceNote(_note);  // update note cache
+	              out += this.renderer.table(header, body);
+	              continue;
 	            }
 
-	            noteSave
-	                .call(noteSaveButtons);
-	        }
-	    }
+	          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.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;
+	                  }
+	                }
 
-	    function userDetails(selection) {
-	        var detailSection = selection.selectAll('.detail-section')
-	            .data([0]);
+	                itemBody += this.parse(item.tokens, loose);
+	                body += this.renderer.listitem(itemBody, task, checked);
+	              }
 
-	        detailSection = detailSection.enter()
-	            .append('div')
-	            .attr('class', 'detail-section')
-	            .merge(detailSection);
+	              out += this.renderer.list(body, ordered, start);
+	              continue;
+	            }
 
-	        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();
-	            });
+	          case 'html':
+	            {
+	              // TODO parse inline content if parameter markdown=1
+	              out += this.renderer.html(token.text);
+	              continue;
+	            }
 
-	        authEnter
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 1);
+	          case 'paragraph':
+	            {
+	              out += this.renderer.paragraph(this.parseInline(token.tokens));
+	              continue;
+	            }
 
+	          case 'text':
+	            {
+	              body = token.tokens ? this.parseInline(token.tokens) : token.text;
 
-	        var prose = detailSection.selectAll('.note-save-prose')
-	            .data(hasAuth ? [0] : []);
+	              while (i + 1 < l && tokens[i + 1].type === 'text') {
+	                token = tokens[++i];
+	                body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
+	              }
 
-	        prose.exit()
-	            .remove();
+	              out += top ? this.renderer.paragraph(body) : body;
+	              continue;
+	            }
 
-	        prose = prose.enter()
-	            .append('p')
-	            .attr('class', 'note-save-prose')
-	            .text(_t('note.upload_explanation'))
-	            .merge(prose);
+	          default:
+	            {
+	              var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-	        osm.userDetails(function(err, user) {
-	            if (err) { return; }
+	              if (this.options.silent) {
+	                console.error(errMsg);
+	                return;
+	              } else {
+	                throw new Error(errMsg);
+	              }
+	            }
+	        }
+	      }
 
-	            var userLink = select(document.createElement('div'));
+	      return out;
+	    }
+	    /**
+	     * Parse Inline Tokens
+	     */
 
-	            if (user.image_url) {
-	                userLink
-	                    .append('img')
-	                    .attr('src', user.image_url)
-	                    .attr('class', 'icon pre-text user-icon');
+	  }, {
+	    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;
 	            }
 
-	            userLink
-	                .append('a')
-	                .attr('class', 'user-info')
-	                .text(user.display_name)
-	                .attr('href', osm.userURL(user.display_name))
-	                .attr('tabindex', -1)
-	                .attr('target', '_blank');
+	          case 'html':
+	            {
+	              out += renderer.html(token.text);
+	              break;
+	            }
 
-	            prose
-	                .html(_t('note.upload_explanation_with_user', { user: userLink.html() }));
-	        });
-	    }
+	          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;
+	            }
 
-	    function noteSaveButtons(selection) {
-	        var osm = services.osm;
-	        var hasAuth = osm && osm.authenticated();
+	          case 'strong':
+	            {
+	              out += renderer.strong(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	        var isSelected = (_note && _note.id === context.selectedNoteID());
-	        var buttonSection = selection.selectAll('.buttons')
-	            .data((isSelected ? [_note] : []), function(d) { return d.status + d.id; });
+	          case 'em':
+	            {
+	              out += renderer.em(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	        // exit
-	        buttonSection.exit()
-	            .remove();
+	          case 'codespan':
+	            {
+	              out += renderer.codespan(token.text);
+	              break;
+	            }
 
-	        // enter
-	        var buttonEnter = buttonSection.enter()
-	            .append('div')
-	            .attr('class', 'buttons');
+	          case 'br':
+	            {
+	              out += renderer.br();
+	              break;
+	            }
 
-	        if (_note.isNew()) {
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button cancel-button secondary-action')
-	                .text(_t('confirm.cancel'));
+	          case 'del':
+	            {
+	              out += renderer.del(this.parseInline(token.tokens, renderer));
+	              break;
+	            }
 
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button save-button action')
-	                .text(_t('note.save'));
+	          case 'text':
+	            {
+	              out += renderer.text(token.text);
+	              break;
+	            }
 
-	        } else {
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button status-button action');
+	          default:
+	            {
+	              var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-	            buttonEnter
-	                .append('button')
-	                .attr('class', 'button comment-button action')
-	                .text(_t('note.comment'));
+	              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
+	     */
 
-	        // update
-	        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);
+	  }, {
+	    key: "parseInline",
+	    value: function parseInline(tokens, options) {
+	      var parser = new Parser(options);
+	      return parser.parseInline(tokens);
+	    }
+	  }]);
 
-	        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);
+	  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
+	 */
 
-	        buttonSection.select('.comment-button')   // select and propagate data
-	            .attr('disabled', isSaveDisabled)
-	            .on('click.comment', clickComment);
+	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');
+	  }
 
-	        function isSaveDisabled(d) {
-	            return (hasAuth && d.status === 'open' && d.newComment) ? null : true;
-	        }
-	    }
+	  if (typeof opt === 'function') {
+	    callback = opt;
+	    opt = null;
+	  }
 
+	  opt = merge$3({}, marked.defaults, opt || {});
+	  checkSanitizeDeprecation$1(opt);
 
+	  if (callback) {
+	    var highlight = opt.highlight;
+	    var tokens;
 
-	    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');
+	    try {
+	      tokens = Lexer_1.lex(src, opt);
+	    } catch (e) {
+	      return callback(e);
 	    }
 
+	    var done = function done(err) {
+	      var out;
 
-	    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);
-	            });
+	      if (!err) {
+	        try {
+	          out = Parser_1.parse(tokens, opt);
+	        } catch (e) {
+	          err = e;
 	        }
-	    }
+	      }
 
+	      opt.highlight = highlight;
+	      return err ? callback(err) : callback(null, out);
+	    };
 
-	    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);
-	            });
-	        }
+	    if (!highlight || highlight.length < 3) {
+	      return done();
 	    }
 
-	    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);
-	            });
-	        }
-	    }
+	    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);
+	            }
 
+	            if (code != null && code !== token.text) {
+	              token.text = code;
+	              token.escaped = true;
+	            }
 
-	    noteEditor.note = function(val) {
-	        if (!arguments.length) { return _note; }
-	        _note = val;
-	        return noteEditor;
-	    };
+	            pending--;
 
-	    noteEditor.newNote = function(val) {
-	        if (!arguments.length) { return _newNote; }
-	        _newNote = val;
-	        return noteEditor;
-	    };
+	            if (pending === 0) {
+	              done();
+	            }
+	          });
+	        }, 0);
+	      }
+	    });
 
+	    if (pending === 0) {
+	      done();
+	    }
 
-	    return utilRebind(noteEditor, dispatch$1, 'on');
-	}
+	    return;
+	  }
 
-	function modeSelectNote(context, selectedNoteID) {
-	    var mode = {
-	        id: 'select-note',
-	        button: 'browse'
-	    };
+	  try {
+	    var _tokens = Lexer_1.lex(src, opt);
 
-	    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));
-	        });
+	    if (opt.walkTokens) {
+	      marked.walkTokens(_tokens, opt.walkTokens);
+	    }
 
-	    var _behaviors = [
-	        behaviorBreathe(),
-	        behaviorHover(context),
-	        behaviorSelect(context),
-	        behaviorLasso(context),
-	        modeDragNode(context).behavior,
-	        modeDragNote(context).behavior
-	    ];
+	    return Parser_1.parse(_tokens, opt);
+	  } catch (e) {
+	    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-	    var _newFeature = false;
+	    if (opt.silent) {
+	      return '<p>An error occurred:</p><pre>' + escape$3(e.message + '', true) + '</pre>';
+	    }
 
+	    throw e;
+	  }
+	}
+	/**
+	 * Options
+	 */
 
-	    function checkSelectedID() {
-	        if (!services.osm) { return; }
-	        var note = services.osm.getNote(selectedNoteID);
-	        if (!note) {
-	            context.enter(modeBrowse(context));
-	        }
-	        return note;
-	    }
 
+	marked.options = marked.setOptions = function (opt) {
+	  merge$3(marked.defaults, opt);
+	  changeDefaults(marked.defaults);
+	  return marked;
+	};
 
-	    // class the note as selected, or return to browse mode if the note is gone
-	    function selectNote(drawn) {
-	        if (!checkSelectedID()) { return; }
+	marked.getDefaults = getDefaults;
+	marked.defaults = defaults$5;
+	/**
+	 * Use Extension
+	 */
 
-	        var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
+	marked.use = function (extension) {
+	  var opts = merge$3({}, extension);
 
-	        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 (extension.renderer) {
+	    (function () {
+	      var renderer = marked.defaults.renderer || new Renderer_1();
 
-	        } else {
-	            selection
-	                .classed('selected', true);
+	      var _loop = function _loop(prop) {
+	        var prevRenderer = renderer[prop];
 
-	            context.selectedNoteID(selectedNoteID);
-	        }
-	    }
+	        renderer[prop] = function () {
+	          for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+	            args[_key] = arguments[_key];
+	          }
 
+	          var ret = extension.renderer[prop].apply(renderer, args);
 
-	    function esc() {
-	        if (context.container().select('.combobox').size()) { return; }
-	        context.enter(modeBrowse(context));
-	    }
+	          if (ret === false) {
+	            ret = prevRenderer.apply(renderer, args);
+	          }
 
+	          return ret;
+	        };
+	      };
 
-	    mode.zoomToSelected = function() {
-	        if (!services.osm) { return; }
-	        var note = services.osm.getNote(selectedNoteID);
-	        if (note) {
-	            context.map().centerZoomEase(note.loc, 20);
-	        }
-	    };
+	      for (var prop in extension.renderer) {
+	        _loop(prop);
+	      }
 
+	      opts.renderer = renderer;
+	    })();
+	  }
 
-	    mode.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return mode;
-	    };
+	  if (extension.tokenizer) {
+	    (function () {
+	      var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();
+
+	      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];
+	          }
 
-	    mode.enter = function() {
-	        var note = checkSelectedID();
-	        if (!note) { return; }
+	          var ret = extension.tokenizer[prop].apply(tokenizer, args);
 
-	        _behaviors.forEach(context.install);
+	          if (ret === false) {
+	            ret = prevTokenizer.apply(tokenizer, args);
+	          }
 
-	        _keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on('⎋', esc, true);
+	          return ret;
+	        };
+	      };
 
-	        select(document)
-	            .call(_keybinding);
+	      for (var prop in extension.tokenizer) {
+	        _loop2(prop);
+	      }
 
-	        selectNote();
+	      opts.tokenizer = tokenizer;
+	    })();
+	  }
 
-	        var sidebar = context.ui().sidebar;
-	        sidebar.show(_noteEditor.note(note).newNote(_newFeature));
+	  if (extension.walkTokens) {
+	    var walkTokens = marked.defaults.walkTokens;
 
-	        // expand the sidebar, avoid obscuring the note if needed
-	        sidebar.expand(sidebar.intersects(note.extent()));
+	    opts.walkTokens = function (token) {
+	      extension.walkTokens(token);
 
-	        context.map()
-	            .on('drawn.select', selectNote);
+	      if (walkTokens) {
+	        walkTokens(token);
+	      }
 	    };
+	  }
 
+	  marked.setOptions(opts);
+	};
+	/**
+	 * Run callback for every token
+	 */
 
-	    mode.exit = function() {
-	        _behaviors.forEach(context.uninstall);
-
-	        select(document)
-	            .call(_keybinding.unbind);
 
-	        context.surface()
-	            .selectAll('.layer-notes .selected')
-	            .classed('selected hover', false);
+	marked.walkTokens = function (tokens, callback) {
+	  var _iterator = _createForOfIteratorHelper(tokens),
+	      _step;
 
-	        context.map()
-	            .on('drawn.select', null);
+	  try {
+	    for (_iterator.s(); !(_step = _iterator.n()).done;) {
+	      var token = _step.value;
+	      callback(token);
 
-	        context.ui().sidebar
-	            .hide();
+	      switch (token.type) {
+	        case 'table':
+	          {
+	            var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
+	                _step2;
 
-	        context.selectedNoteID(null);
-	    };
+	            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;
 
-	    return mode;
-	}
+	            try {
+	              for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
+	                var row = _step3.value;
 
-	function modeDragNote(context) {
-	    var mode = {
-	        id: 'drag-note',
-	        button: 'browse'
-	    };
+	                var _iterator4 = _createForOfIteratorHelper(row),
+	                    _step4;
 
-	    var edit = behaviorEdit(context);
+	                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();
+	            }
 
-	    var _nudgeInterval;
-	    var _lastLoc;
-	    var _note;    // most current note.. dragged note may have stale datum.
+	            break;
+	          }
 
+	        case 'list':
+	          {
+	            marked.walkTokens(token.items, callback);
+	            break;
+	          }
 
-	    function startNudge(nudge) {
-	        if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-	        _nudgeInterval = window.setInterval(function() {
-	            context.map().pan(nudge);
-	            doMove(nudge);
-	        }, 50);
+	        default:
+	          {
+	            if (token.tokens) {
+	              marked.walkTokens(token.tokens, callback);
+	            }
+	          }
+	      }
 	    }
+	  } catch (err) {
+	    _iterator.e(err);
+	  } finally {
+	    _iterator.f();
+	  }
+	};
+	/**
+	 * Parse Inline
+	 */
 
 
-	    function stopNudge() {
-	        if (_nudgeInterval) {
-	            window.clearInterval(_nudgeInterval);
-	            _nudgeInterval = null;
-	        }
-	    }
+	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');
+	  }
 
+	  if (typeof src !== 'string') {
+	    throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+	  }
 
-	    function origin(note) {
-	        return context.projection(note.loc);
-	    }
+	  opt = merge$3({}, marked.defaults, opt || {});
+	  checkSanitizeDeprecation$1(opt);
 
+	  try {
+	    var tokens = Lexer_1.lexInline(src, opt);
 
-	    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);
-	        }
+	    if (opt.walkTokens) {
+	      marked.walkTokens(tokens, opt.walkTokens);
+	    }
 
-	        context.surface().selectAll('.note-' + _note.id)
-	            .classed('active', true);
+	    return Parser_1.parseInline(tokens, opt);
+	  } catch (e) {
+	    e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-	        context.perform(actionNoop());
-	        context.enter(mode);
-	        context.selectedNoteID(_note.id);
+	    if (opt.silent) {
+	      return '<p>An error occurred:</p><pre>' + escape$3(e.message + '', true) + '</pre>';
 	    }
 
+	    throw e;
+	  }
+	};
+	/**
+	 * Expose
+	 */
 
-	    function move() {
-	        event.sourceEvent.stopPropagation();
-	        _lastLoc = context.projection.invert(event.point);
-
-	        doMove();
-	        var nudge = geoViewportEdge(event.point, context.map().dimensions());
-	        if (nudge) {
-	            startNudge(nudge);
-	        } else {
-	            stopNudge();
-	        }
-	    }
 
+	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;
 
-	    function doMove(nudge) {
-	        nudge = nudge || [0, 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
 
-	        var currPoint = (event && event.point) || context.projection(_lastLoc);
-	        var currMouse = geoVecSubtract(currPoint, nudge);
-	        var loc = context.projection.invert(currMouse);
+	var _cache$2;
 
-	        _note = _note.move(loc);
+	function abortRequest$2(controller) {
+	  if (controller) {
+	    controller.abort();
+	  }
+	}
 
-	        var osm = services.osm;
-	        if (osm) {
-	            osm.replaceNote(_note);  // update note cache
-	        }
+	function abortUnwantedRequests$2(cache, tiles) {
+	  Object.keys(cache.inflightTile).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k === tile.id;
+	    });
 
-	        context.replace(actionNoop());   // trigger redraw
+	    if (!wanted) {
+	      abortRequest$2(cache.inflightTile[k]);
+	      delete cache.inflightTile[k];
 	    }
+	  });
+	}
 
+	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
 
-	    function end() {
-	        context.replace(actionNoop());   // trigger redraw
-
-	        context
-	            .selectedNoteID(_note.id)
-	            .enter(modeSelectNote(context, _note.id));
-	    }
 
+	function updateRtree$2(item, replace) {
+	  _cache$2.rtree.remove(item, function (a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	    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);
+	  if (replace) {
+	    _cache$2.rtree.insert(item);
+	  }
+	} // Issues shouldn't obscure each other
 
 
-	    mode.enter = function() {
-	        context.install(edit);
-	    };
+	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);
 
-	    mode.exit = function() {
-	        context.ui().sidebar.hover.cancel();
-	        context.uninstall(edit);
+	  return loc;
+	}
 
-	        context.surface()
-	            .selectAll('.active')
-	            .classed('active', false);
+	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]);
+	      }, []);
+	    });
 
-	        stopNudge();
-	    };
+	    if (!_cache$2) {
+	      this.reset();
+	    }
 
-	    mode.behavior = drag;
+	    this.event = utilRebind(this, dispatch$3, 'on');
+	  },
+	  reset: function reset() {
+	    var _strings = {};
+	    var _colors = {};
 
-	    return mode;
-	}
+	    if (_cache$2) {
+	      Object.values(_cache$2.inflightTile).forEach(abortRequest$2); // Strings and colors are static and should not be re-populated
 
-	function uiDataHeader() {
-	    var _datum;
+	      _strings = _cache$2.strings;
+	      _colors = _cache$2.colors;
+	    }
 
+	    _cache$2 = {
+	      data: {},
+	      loadedTile: {},
+	      inflightTile: {},
+	      inflightPost: {},
+	      closed: {},
+	      rtree: new RBush(),
+	      strings: _strings,
+	      colors: _colors
+	    };
+	  },
+	  loadIssues: function loadIssues(projection) {
+	    var _this = this;
 
-	    function dataHeader(selection) {
-	        var header = selection.selectAll('.data-header')
-	            .data(
-	                (_datum ? [_datum] : []),
-	                function(d) { return d.__featurehash__; }
-	            );
+	    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
 
-	        header.exit()
-	            .remove();
+	    var tiles = tiler$2.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'data-header');
+	    abortUnwantedRequests$2(_cache$2, tiles); // issue new requests..
 
-	        var iconEnter = headerEnter
-	            .append('div')
-	            .attr('class', 'data-header-icon');
+	    tiles.forEach(function (tile) {
+	      if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
 
-	        iconEnter
-	            .append('div')
-	            .attr('class', 'preset-icon-28')
-	            .call(svgIcon('#iD-icon-data', 'note-fill'));
+	      var _tile$xyz = _slicedToArray(tile.xyz, 3),
+	          x = _tile$xyz[0],
+	          y = _tile$xyz[1],
+	          z = _tile$xyz[2];
 
-	        headerEnter
-	            .append('div')
-	            .attr('class', 'data-header-label')
-	            .text(_t('map_data.layers.custom.title'));
-	    }
+	      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 = [];
+	              }
 
+	              _cache$2.data[d.id] = d;
 
-	    dataHeader.datum = function(val) {
-	        if (!arguments.length) { return _datum; }
-	        _datum = val;
-	        return this;
-	    };
+	              _cache$2.rtree.insert(encodeIssueRtree$2(d));
+	            }
+	          });
+	        }
 
+	        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;
 
-	    return dataHeader;
-	}
+	    // Issue details only need to be fetched once
+	    if (issue.elems !== undefined) {
+	      return Promise.resolve(issue);
+	    }
 
-	// 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
-	//   }, ...]
+	    var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "?langs=").concat(_mainLocalizer.localeCode());
 
-	var _comboHideTimerID;
+	    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
 
-	function uiCombobox(context, klass) {
-	    var dispatch$1 = dispatch('accept', 'cancel');
-	    var container = context.container();
+	      issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
 
-	    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;
-	            });
-	        }));
+	      _this2.replaceItem(issue);
 	    };
 
-	    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();
-	                    });
-	            });
+	    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);
 
+	    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
 
-	        function mousedown() {
-	            if (event.button !== 0) { return; }    // left click only
-	            _tDown = +new Date();
 
-	            // 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;
-	            }
+	    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
 
-	            input.on('mouseup.combo-input', mouseup);
-	        }
 
+	    var allRequests = items.map(function (itemType) {
+	      // No need to request data we already have
+	      if (itemType in _cache$2.strings[locale]) return null;
 
-	        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
+	      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$categories$;
 
-	            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);
+	        var _cat$items = _slicedToArray(cat.items, 1),
+	            _cat$items$ = _cat$items[0],
+	            item = _cat$items$ === void 0 ? {
+	          "class": []
+	        } : _cat$items$;
 
-	            } else {
-	                hide();
-	            }
-	        }
+	        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 focus() {
-	            fetchComboData('');   // prefetch values (may warm taginfo cache)
-	        }
+	        if (!cl) {
+	          /* eslint-disable no-console */
+	          console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
+	          /* eslint-enable no-console */
 
+	          return;
+	        } // Cache served item colors to automatically style issue markers later
 
-	        function blur() {
-	            _comboHideTimerID = window.setTimeout(hide, 75);
-	        }
 
+	        var itemInt = item.item,
+	            color = item.color;
 
-	        function show() {
-	            hide();   // remove any existing
+	        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
 
-	            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);
-	        }
+	        var title = cl.title,
+	            detail = cl.detail,
+	            fix = cl.fix,
+	            trap = cl.trap; // 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);
+	        _cache$2.strings[locale][itemType] = issueStrings;
+	      };
 
-	        function hide() {
-	            if (_comboHideTimerID) {
-	                window.clearTimeout(_comboHideTimerID);
-	                _comboHideTimerID = undefined;
-	            }
+	      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
 
-	            container.selectAll('.combobox')
-	                .remove();
 
-	            container
-	                .on('scroll.combo-scroll', null);
-	        }
+	      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 (_cache$2.inflightPost[issue.id]) {
+	      return callback({
+	        message: 'Issue update already inflight',
+	        status: -2
+	      }, issue);
+	    } // UI sets the status to either 'done' or 'false'
 
-	        function keydown() {
-	            var shown = !container.selectAll('.combobox').empty();
-	            var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
 
-	            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;
-	            }
-	        }
+	    var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
+	    var controller = new AbortController();
 
+	    var after = function after() {
+	      delete _cache$2.inflightPost[issue.id];
 
-	        function keyup() {
-	            switch (event.keyCode) {
-	                case 27:  // ⎋ Escape
-	                    cancel();
-	                    break;
+	      _this3.removeItem(issue);
 
-	                case 13:  // ↩ Return
-	                    accept();
-	                    break;
-	            }
+	      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;
 	        }
 
+	        _cache$2.closed[issue.item] += 1;
+	      }
 
-	        // 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 (callback) callback(null, issue);
+	    };
 
-	                if (val.length) {
-	                    var combo = container.selectAll('.combobox');
-	                    if (combo.empty()) {
-	                        show();
-	                    }
-	                } else {
-	                    hide();
-	                }
+	    _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
 
-	                render();
-	            });
-	        }
+	    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);
+	  }
+	};
 
+	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;
 
-	        // 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;
-	                    }
-	                }
+	var _mlyCache;
 
-	                // pick new _selected
-	                index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
-	                _selected = _suggestions[index].value;
-	                input.property('value', _selected);
-	            }
+	var _mlyClicks;
 
-	            render();
-	            ensureVisible();
-	        }
+	var _mlyActiveImage;
 
+	var _mlySelectedImageKey;
 
-	        function ensureVisible() {
-	            var combo = container.selectAll('.combobox');
-	            if (combo.empty()) { return; }
+	var _mlyViewer;
 
-	            var containerRect = container.node().getBoundingClientRect();
-	            var comboRect = combo.node().getBoundingClientRect();
+	var _mlyViewerFilter = ['all'];
 
-	            if (comboRect.bottom > containerRect.bottom) {
-	                var node = attachTo ? attachTo.node() : input.node();
-	                node.scrollIntoView({ behavior: 'instant', block: 'center' });
-	                render();
-	            }
+	var _loadViewerPromise;
 
-	            // 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' });
-	            }
-	        }
+	var _mlyHighlightedDetection;
 
+	var _mlyShowFeatureDetections = false;
+	var _mlyShowSignDetections = false;
 
-	        function value() {
-	            var value = input.property('value');
-	            var start = input.property('selectionStart');
-	            var end = input.property('selectionEnd');
+	function abortRequest$3(controller) {
+	  controller.abort();
+	}
 
-	            if (start && end) {
-	                value = value.substring(0, start);
-	            }
+	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
 
-	            return value;
-	        }
+	  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];
+	    }
+	  });
+	  tiles.forEach(function (tile) {
+	    loadNextTilePage(which, currZoom, url, tile);
+	  });
+	}
 
-	        function fetchComboData(v, cb) {
-	            _cancelFetch = false;
+	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);
+	    }
 
-	            _fetcher.call(input, v, function(results) {
-	                // already chose a value, don't overwrite or autocomplete it
-	                if (_cancelFetch) { return; }
+	    var linkHeader = response.headers.get('Link');
 
-	                _suggestions = results;
-	                results.forEach(function(d) { _fetched[d.value] = d; });
+	    if (linkHeader) {
+	      var pagination = parsePagination(linkHeader);
 
-	                if (cb) {
-	                    cb();
-	                }
-	            });
-	        }
+	      if (pagination.next) {
+	        cache.nextURL[tile.id] = pagination.next;
+	      }
+	    }
 
+	    return response.json();
+	  }).then(function (data) {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
 
-	        function tryAutocomplete() {
-	            if (!_canAutocomplete) { return; }
+	    if (!data || !data.features || !data.features.length) {
+	      throw new Error('No Data');
+	    }
 
-	            var val = _caseSensitive ? value() : value().toLowerCase();
-	            if (!val) { 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
 
-	            // Don't autocomplete if user is typing a number - #4935
-	            if (!isNaN(parseFloat(val)) && isFinite(val)) { return; }
+	      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
+	        };
+	      }
 
-	            var bestIndex = -1;
-	            for (var i = 0; i < _suggestions.length; i++) {
-	                var suggestion = _suggestions[i].value;
-	                var compare = _caseSensitive ? suggestion : suggestion.toLowerCase();
+	      return {
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      };
+	    }).filter(Boolean);
 
-	                // if search string matches suggestion exactly, pick it..
-	                if (compare === val) {
-	                    bestIndex = i;
-	                    break;
+	    if (cache.rtree && features) {
+	      cache.rtree.load(features);
+	    }
 
-	                // otherwise lock in the first result that starts with the search string..
-	                } else if (bestIndex === -1 && compare.indexOf(val) === 0) {
-	                    bestIndex = i;
-	                }
-	            }
+	    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
+	    }
 
-	            if (bestIndex !== -1) {
-	                var bestVal = _suggestions[bestIndex].value;
-	                input.property('value', bestVal);
-	                input.node().setSelectionRange(val.length, bestVal.length);
-	                return bestVal;
-	            }
-	        }
+	    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 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);
+	    }
 
-	        function render() {
-	            if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
-	                hide();
-	                return;
-	            }
+	    return response.json();
+	  }).then(function (data) {
+	    if (!data || !data.features || !data.features.length) {
+	      throw new Error('No Data');
+	    }
 
-	            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');
-	            }
+	    data.features.forEach(function (feature) {
+	      var d;
 
-	            // clear (and keep) selection
-	            var val = utilGetSetValue(input);
-	            thiz.setSelectionRange(val.length, val.length);
+	      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
+	        };
 
-	            d = _fetched[val];
-	            dispatch$1.call('accept', thiz, d, val);
-	            hide();
+	        if (!cache.forImageKey[d.image_key]) {
+	          cache.forImageKey[d.image_key] = [];
 	        }
 
+	        cache.forImageKey[d.image_key].push(d);
+	      }
+	    });
+	  });
+	}
 
-	        // Dispatches an 'cancel' event
-	        // Then hides the combobox.
-	        function cancel() {
-	            _cancelFetch = true;
-	            var thiz = input.node();
-
-	            // 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);
+	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
 
-	            dispatch$1.call('cancel', thiz);
-	            hide();
-	        }
 
-	    };
+	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;
+	  }, {});
+	} // partition viewport into higher zoom tiles
 
-	    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;
-	    };
+	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
 
-	    combobox.data = function(val) {
-	        if (!arguments.length) { return _data; }
-	        _data = val;
-	        return combobox;
-	    };
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // no more than `limit` results per partition.
 
-	    combobox.fetcher = function(val) {
-	        if (!arguments.length) { return _fetcher; }
-	        _fetcher = val;
-	        return combobox;
-	    };
 
-	    combobox.minItems = function(val) {
-	        if (!arguments.length) { return _minItems; }
-	        _minItems = val;
-	        return combobox;
-	    };
+	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;
+	  }, []);
+	}
 
-	    combobox.itemsMouseEnter = function(val) {
-	        if (!arguments.length) { return _mouseEnterHandler; }
-	        _mouseEnterHandler = val;
-	        return combobox;
-	    };
+	var serviceMapillary = {
+	  init: function init() {
+	    if (!_mlyCache) {
+	      this.reset();
+	    }
 
-	    combobox.itemsMouseLeave = function(val) {
-	        if (!arguments.length) { return _mouseLeaveHandler; }
-	        _mouseLeaveHandler = val;
-	        return combobox;
+	    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
 
-	    return utilRebind(combobox, dispatch$1, 'on');
-	}
+	    _mlyCache.images.rtree.search(bbox).forEach(function (d) {
+	      var sequenceKey = _mlyCache.sequences.forImageKey[d.data.key];
 
+	      if (sequenceKey) {
+	        sequenceKeys[sequenceKey] = true;
+	      }
+	    }); // Return lineStrings for the sequences
 
-	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);
 
+	    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
 
-	    context.container()
-	        .on('scroll.combo-scroll', null);
-	};
+	    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;
 
-	// 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); }
-	            });
-	    };
-	}
+	      function loaded() {
+	        loadedCount += 1; // wait until both files are loaded
 
-	function uiDisclosure(context, key, expandedDefault) {
-	    var dispatch$1 = dispatch('toggled');
-	    var _expanded;
-	    var _title = utilFunctor('');
-	    var _updatePreference = true;
-	    var _content = function () {};
+	        if (loadedCount === 2) resolve();
+	      }
 
+	      var head = select('head'); // load mapillary-viewercss
 
-	    var disclosure = function(selection) {
+	      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
 
-	        if (_expanded === undefined || _expanded === null) {
-	            // loading _expanded here allows it to be reset by calling `disclosure.expanded(null)`
+	      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 preference = corePreferences('disclosure.' + key + '.expanded');
-	            _expanded = preference === null ? !!expandedDefault : (preference === 'true');
-	        }
+	    }
+	  },
+	  showFeatureDetections: function showFeatureDetections(value) {
+	    _mlyShowFeatureDetections = value;
 
-	        var hideToggle = selection.selectAll('.hide-toggle-' + key)
-	            .data([0]);
+	    if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+	      this.resetTags();
+	    }
+	  },
+	  showSignDetections: function showSignDetections(value) {
+	    _mlyShowSignDetections = value;
 
-	        // enter
-	        var hideToggleEnter = hideToggle.enter()
-	            .append('a')
-	            .attr('href', '#')
-	            .attr('class', 'hide-toggle hide-toggle-' + key)
-	            .call(svgIcon('', 'pre-text', 'hide-toggle-icon'));
+	    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]]);
 
-	        hideToggleEnter
-	            .append('span')
-	            .attr('class', 'hide-toggle-text');
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      filter.push(['>=', 'capturedAt', fromTimestamp]);
+	    }
 
-	        // update
-	        hideToggle = hideToggleEnter
-	            .merge(hideToggle);
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      filter.push(['>=', 'capturedAt', toTimestamp]);
+	    }
 
-	        hideToggle
-	            .on('click', toggle)
-	            .classed('expanded', _expanded);
+	    if (_mlyViewer) {
+	      _mlyViewer.setFilter(filter);
+	    }
 
-	        hideToggle.selectAll('.hide-toggle-text')
-	            .text(_title());
+	    _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();
 
-	        hideToggle.selectAll('.hide-toggle-icon')
-	            .attr('xlink:href', _expanded ? '#iD-icon-down'
-	                : (_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'
-	            );
+	    if (isHidden && _mlyViewer) {
+	      wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
+	      wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);
 
+	      _mlyViewer.resize();
+	    }
 
-	        var wrap = selection.selectAll('.disclosure-wrap')
-	            .data([0]);
+	    return this;
+	  },
+	  hideViewer: function hideViewer(context) {
+	    _mlyActiveImage = null;
+	    _mlySelectedImageKey = null;
 
-	        // enter/update
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'disclosure-wrap disclosure-wrap-' + key)
-	            .merge(wrap)
-	            .classed('hide', !_expanded);
+	    if (!_mlyFallback && _mlyViewer) {
+	      _mlyViewer.getComponent('sequence').stop();
+	    }
 
-	        if (_expanded) {
-	            wrap
-	                .call(_content);
-	        }
+	    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);
 
+	      if (imageKey) {
+	        hash.photo = 'mapillary/' + imageKey;
+	      } else {
+	        delete hash.photo;
+	      }
 
-	        function toggle() {
-	            event.preventDefault();
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
+	  },
+	  highlightDetection: function highlightDetection(detection) {
+	    if (detection) {
+	      _mlyHighlightedDetection = detection.detection_key;
+	    }
 
-	            _expanded = !_expanded;
+	    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
 
-	            if (_updatePreference) {
-	                corePreferences('disclosure.' + key + '.expanded', _expanded);
-	            }
+	      };
+	    }
 
-	            hideToggle
-	                .classed('expanded', _expanded);
+	    _mlyViewer = new Mapillary.Viewer('ideditor-mly', clientId, null, opts);
 
-	            hideToggle.selectAll('.hide-toggle-icon')
-	                .attr('xlink:href', _expanded ? '#iD-icon-down'
-	                    : (_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'
-	                );
+	    _mlyViewer.on('nodechanged', nodeChanged);
 
-	            wrap
-	                .call(uiToggle(_expanded));
+	    _mlyViewer.on('bearingchanged', bearingChanged);
 
-	            if (_expanded) {
-	                wrap
-	                    .call(_content);
-	            }
+	    if (_mlyViewerFilter) {
+	      _mlyViewer.setFilter(_mlyViewerFilter);
+	    } // Register viewer resize handler
 
-	            dispatch$1.call('toggled', this, _expanded);
-	        }
-	    };
 
+	    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.
+	    //
 
-	    disclosure.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = utilFunctor(val);
-	        return disclosure;
-	    };
+	    function nodeChanged(node) {
+	      that.resetTags();
+	      var clicks = _mlyClicks;
+	      var index = clicks.indexOf(node.key);
+	      var selectedKey = _mlySelectedImageKey;
+	      that.setActiveImage(node);
 
+	      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..
 
-	    disclosure.expanded = function(val) {
-	        if (!arguments.length) { return _expanded; }
-	        _expanded = val;
-	        return disclosure;
-	    };
+	        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);
+	      }
 
+	      dispatch$4.call('nodeChanged');
+	    }
 
-	    disclosure.updatePreference = function(val) {
-	        if (!arguments.length) { return _updatePreference; }
-	        _updatePreference = val;
-	        return disclosure;
-	    };
+	    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);
+	    }
 
-	    disclosure.content = function(val) {
-	        if (!arguments.length) { return _content; }
-	        _content = val;
-	        return disclosure;
-	    };
+	    this.setStyles(context, null, true);
 
+	    if (_mlyShowFeatureDetections) {
+	      this.updateDetections(imageKey, apibase + 'image_detections?layers=points&values=' + mapFeatureConfig.values + '&image_keys=' + imageKey);
+	    }
 
-	    return utilRebind(disclosure, dispatch$1, 'on');
-	}
+	    if (_mlyShowSignDetections) {
+	      this.updateDetections(imageKey, apibase + 'image_detections?layers=trafficsigns&image_keys=' + imageKey);
+	    }
 
-	// 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) {
+	    if (_mlyViewer && imageKey) {
+	      _mlyViewer.moveToKey(imageKey)["catch"](function (e) {
+	        console.error('mly3', e);
+	      }); // eslint-disable-line no-console
 
-	    var _classes = utilFunctor('');
-	    var _shouldDisplay;
-	    var _content;
+	    }
 
-	    var _disclosure;
-	    var _title;
-	    var _expandedByDefault = utilFunctor(true);
-	    var _disclosureContent;
-	    var _disclosureExpanded;
+	    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
 
-	    var _containerSelection = select(null);
+	    context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
 
-	    var section = {
-	        id: id
-	    };
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	    section.classes = function(val) {
-	        if (!arguments.length) { return _classes; }
-	        _classes = utilFunctor(val);
-	        return section;
-	    };
+	      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';
+	      }
+	    }
 
-	    section.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = utilFunctor(val);
-	        return section;
-	    };
+	    return this;
+	  },
+	  updateDetections: function updateDetections(imageKey, url) {
+	    if (!_mlyViewer || _mlyFallback) return;
+	    if (!imageKey) return;
 
-	    section.expandedByDefault = function(val) {
-	        if (!arguments.length) { return _expandedByDefault; }
-	        _expandedByDefault = utilFunctor(val);
-	        return section;
-	    };
+	    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]);
+	    }
 
-	    section.shouldDisplay = function(val) {
-	        if (!arguments.length) { return _shouldDisplay; }
-	        _shouldDisplay = utilFunctor(val);
-	        return section;
-	    };
+	    function showDetections(detections) {
+	      detections.forEach(function (data) {
+	        var tag = makeTag(data);
 
-	    section.content = function(val) {
-	        if (!arguments.length) { return _content; }
-	        _content = val;
-	        return section;
-	    };
+	        if (tag) {
+	          var tagComponent = _mlyViewer.getComponent('tag');
 
-	    section.disclosureContent = function(val) {
-	        if (!arguments.length) { return _disclosureContent; }
-	        _disclosureContent = val;
-	        return section;
-	    };
+	          tagComponent.add([tag]);
+	        }
+	      });
+	    }
 
-	    section.disclosureExpanded = function(val) {
-	        if (!arguments.length) { return _disclosureExpanded; }
-	        _disclosureExpanded = val;
-	        return section;
-	    };
+	    function makeTag(data) {
+	      var valueParts = data.value.split('--');
+	      if (!valueParts.length) return;
+	      var tag;
+	      var text;
+	      var color = 0xffffff;
 
-	    // may be called multiple times
-	    section.render = function(selection) {
+	      if (_mlyHighlightedDetection === data.key) {
+	        color = 0xffff00;
+	        text = valueParts[1];
 
-	        _containerSelection = selection
-	            .selectAll('.section-' + id)
-	            .data([0]);
+	        if (text === 'flat' || text === 'discrete' || text === 'sign') {
+	          text = valueParts[2];
+	        }
 
-	        var sectionEnter = _containerSelection
-	            .enter()
-	            .append('div')
-	            .attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
+	        text = text.replace(/-/g, ' ');
+	        text = text.charAt(0).toUpperCase() + text.slice(1);
+	        _mlyHighlightedDetection = null;
+	      }
 
-	        _containerSelection = sectionEnter
-	            .merge(_containerSelection);
+	      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
+	        });
+	      }
 
-	        _containerSelection
-	            .call(renderContent);
-	    };
+	      return tag;
+	    }
+	  },
+	  cache: function cache() {
+	    return _mlyCache;
+	  }
+	};
 
-	    section.reRender = function() {
-	        _containerSelection
-	            .call(renderContent);
-	    };
+	function validationIssue(attrs) {
+	  this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')
 
-	    section.selection = function() {
-	        return _containerSelection;
-	    };
+	  this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
 
-	    section.disclosure = function() {
-	        return _disclosure;
-	    };
+	  this.severity = attrs.severity; // required - 'warning' or 'error'
 
-	    // may be called multiple times
-	    function renderContent(selection) {
-	        if (_shouldDisplay) {
-	            var shouldDisplay = _shouldDisplay();
-	            selection.classed('hide', !shouldDisplay);
-	            if (!shouldDisplay) {
-	                selection.html('');
-	                return;
-	            }
-	        }
+	  this.message = attrs.message; // required - function returning localized string
 
-	        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);
+	  this.reference = attrs.reference; // optional - function(selection) to render reference information
 
-	            return;
-	        }
+	  this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue
 
-	        if (_content) {
-	            selection
-	                .call(_content);
-	        }
-	    }
+	  this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue
 
-	    return section;
-	}
+	  this.data = attrs.data; // optional - object containing extra data for the fixes
 
-	// 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 = {};
+	  this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes
 
-	    var _button = select(null);
-	    var _body = select(null);
-	    var _loaded;
-	    var _showing;
+	  this.hash = attrs.hash; // optional - string to further differentiate the issue
 
+	  this.id = generateID.apply(this); // generated - see below
 
-	    function load() {
-	        if (!wikibase) { return; }
+	  this.autoFix = null; // generated - if autofix exists, will be set below
+	  // A unique, deterministic string hash.
+	  // Issues with identical id values are considered identical.
 
-	        _button
-	            .classed('tag-reference-loading', true);
+	  function generateID() {
+	    var parts = [this.type];
 
-	        wikibase.getDocs(what, gotDocs);
+	    if (this.hash) {
+	      // subclasses can pass in their own differentiator
+	      parts.push(this.hash);
 	    }
 
+	    if (this.subtype) {
+	      parts.push(this.subtype);
+	    } // include the entities this issue is for
+	    // (sort them so the id is deterministic)
 
-	    function gotDocs(err, docs) {
-	        _body.html('');
-
-	        if (!docs || !docs.title) {
-	            _body
-	                .append('p')
-	                .attr('class', 'tag-reference-description')
-	                .text(_t('inspector.no_documentation_key'));
-	            done();
-	            return;
-	        }
 
-	        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'));
-	        }
+	    if (this.entityIds) {
+	      var entityKeys = this.entityIds.slice().sort();
+	      parts.push.apply(parts, entityKeys);
 	    }
 
+	    return parts.join(':');
+	  }
 
-	    function done() {
-	        _loaded = true;
+	  this.extent = function (resolver) {
+	    if (this.loc) {
+	      return geoExtent(this.loc);
+	    }
 
-	        _button
-	            .classed('tag-reference-loading', false);
+	    if (this.entityIds && this.entityIds.length) {
+	      return this.entityIds.reduce(function (extent, entityId) {
+	        return extent.extend(resolver.entity(entityId).extent(resolver));
+	      }, geoExtent());
+	    }
 
-	        _body
-	            .classed('expanded', true)
-	            .transition()
-	            .duration(200)
-	            .style('max-height', '200px')
-	            .style('opacity', '1');
+	    return null;
+	  };
 
-	        _showing = true;
+	  this.fixes = function (context) {
+	    var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
+	    var issue = this;
 
-	        _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');
-	            }
-	        });
+	    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);
+	        }
+	      }));
 	    }
 
+	    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 hide() {
-	        _body
-	            .transition()
-	            .duration(200)
-	            .style('max-height', '0px')
-	            .style('opacity', '0')
-	            .on('end', function () {
-	                _body.classed('expanded', false);
-	            });
+	      fix.issue = issue;
 
-	        _showing = false;
-
-	        _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');
-	            }
-	        });
+	      if (fix.autoArgs) {
+	        issue.autoFix = fix;
+	      }
+	    });
+	    return fixes;
+	  };
+	}
+	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
 
-	    tagReference.button = function(selection, klass, iconName) {
-	        _button = selection.selectAll('.tag-reference-button')
-	            .data([0]);
+	  this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set
 
-	        _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);
+	  this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.
 
-	        _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();
-	                }
-	            });
-	    };
+	  this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run
 
+	  this.issue = null; // Generated link - added by validationIssue
+	}
 
-	    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; });
+	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];
 
-	        _body.exit()
-	            .remove();
+	      var expression = _positiveRegex[tagKey].join('|');
 
-	        _body = _body.enter()
-	            .append('div')
-	            .attr('class', 'tag-reference-body')
-	            .style('max-height', '0')
-	            .style('opacity', '0')
-	            .merge(_body);
+	      var regex = new RegExp(expression);
+	      return function (tags) {
+	        return regex.test(tags[tagKey]);
+	      };
+	    },
+	    negativeRegex: function negativeRegex(_negativeRegex) {
+	      var tagKey = Object.keys(_negativeRegex)[0];
 
-	        if (_showing === false) {
-	            hide();
-	        }
-	    };
+	      var expression = _negativeRegex[tagKey].join('|');
 
+	      var regex = new RegExp(expression);
+	      return function (tags) {
+	        return !regex.test(tags[tagKey]);
+	      };
+	    }
+	  };
+	};
 
-	    tagReference.showing = function(val) {
-	        if (!arguments.length) { return _showing; }
-	        _showing = val;
-	        return tagReference;
-	    };
+	var buildLineKeys = function buildLineKeys() {
+	  return {
+	    highway: {
+	      rest_area: true,
+	      services: true
+	    },
+	    railway: {
+	      roundhouse: true,
+	      station: true,
+	      traverser: true,
+	      turntable: true,
+	      wash: true
+	    }
+	  };
+	};
 
+	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]));
+	      }
 
-	    return tagReference;
-	}
+	      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, '');
+	      });
+	    };
 
-	function uiSectionRawTagEditor(id, context) {
+	    var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
+	      var values;
+	      var isRegex = /regex/gi.test(key);
+	      var isEqual = /equals/gi.test(key);
 
-	    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;
-	        });
+	      if (isRegex || isEqual) {
+	        Object.keys(selector[key]).forEach(function (selectorKey) {
+	          values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
 
-	        // 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 (expectedTags.hasOwnProperty(selectorKey)) {
+	            values = values.concat(expectedTags[selectorKey]);
+	          }
 
-	        // assemble row data
-	        var rowData = _orderedKeys.map(function(key, i) {
-	            return { index: i, key: key, value: _tags[key] };
+	          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]];
 
-	        // append blank row last, if necessary
-	        if (!rowData.length || _showBlank) {
-	            _showBlank = false;
-	            rowData.push({ index: rowData.length, key: '', value: '' });
+	        if (expectedTags.hasOwnProperty(tagKey)) {
+	          values = values.concat(expectedTags[tagKey]);
 	        }
 
+	        expectedTags[tagKey] = values;
+	      }
 
-	        // View Options
-	        var options = wrap.selectAll('.raw-tag-options')
-	            .data([0]);
-
-	        options.exit()
-	            .remove();
+	      return expectedTags;
+	    }, {});
+	    return tagMap;
+	  },
+	  // inspired by osmWay#isArea()
+	  inferGeometry: function inferGeometry(tagMap) {
+	    var _lineKeys = this._lineKeys;
+	    var _areaKeys = this._areaKeys;
 
-	        var optionsEnter = options.enter()
-	            .insert('div', ':first-child')
-	            .attr('class', 'raw-tag-options');
+	    var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
+	      return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
+	    };
 
-	        var optionEnter = optionsEnter.selectAll('.raw-tag-option')
-	            .data(availableViews, function(d) { return d.id; })
-	            .enter();
+	    var keyValueImpliesLine = function keyValueImpliesLine(key) {
+	      return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
+	    };
 
-	        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 (tagMap.hasOwnProperty('area')) {
+	      if (tagMap.area.indexOf('yes') > -1) {
+	        return 'area';
+	      }
 
-	                wrap.selectAll('.raw-tag-option')
-	                    .classed('selected', function(datum) { return datum === d; });
+	      if (tagMap.area.indexOf('no') > -1) {
+	        return 'line';
+	      }
+	    }
 
-	                wrap.selectAll('.tag-text')
-	                    .classed('hide', (d.id !== 'text'))
-	                    .each(setTextareaHeight);
+	    for (var key in tagMap) {
+	      if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
+	        return 'area';
+	      }
 
-	                wrap.selectAll('.tag-list, .add-row')
-	                    .classed('hide', (d.id !== 'list'));
-	            })
-	            .each(function(d) {
-	                select(this)
-	                    .call(svgIcon(d.icon));
-	            });
+	      if (key in _lineKeys && keyValueImpliesLine(key)) {
+	        return 'area';
+	      }
+	    }
 
+	    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]
+	          }));
+	        }
+	      }
+	    };
 
-	        // View as Text
-	        var textData = rowsToText(rowData);
-	        var textarea = wrap.selectAll('.tag-text')
-	            .data([0]);
+	    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;
+	  }
+	};
 
-	        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);
+	var apibase$1 = 'https://nominatim.openstreetmap.org/';
+	var _inflight = {};
 
-	        textarea
-	            .call(utilGetSetValue, textData)
-	            .each(setTextareaHeight)
-	            .on('input', setTextareaHeight)
-	            .on('blur', textChanged)
-	            .on('change', textChanged);
+	var _nominatimCache;
 
+	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]
+	    });
 
-	        // View as List
-	        var list = wrap.selectAll('.tag-list')
-	            .data([0]);
+	    if (cached.length > 0) {
+	      if (callback) callback(null, cached[0].data);
+	      return;
+	    }
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'tag-list' + (_tagView !== 'list' ? ' hide' : ''))
-	            .merge(list);
+	    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);
+	      }
 
+	      var extent = geoExtent(loc).padByMeters(200);
 
-	        // Container for the Add button
-	        var addRowEnter = wrap.selectAll('.add-row')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'add-row' + (_tagView !== 'list' ? ' hide' : ''));
+	      _nominatimCache.insert(Object.assign(extent.bbox(), {
+	        data: result
+	      }));
 
-	        addRowEnter
-	            .append('button')
-	            .attr('class', 'add-tag')
-	            .call(svgIcon('#iD-icon-plus', 'light'))
-	            .on('click', addTag);
+	      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);
+	      }
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-value');   // preserve space
+	      if (callback) callback(null, result);
+	    })["catch"](function (err) {
+	      delete _inflight[url];
+	      if (err.name === 'AbortError') return;
+	      if (callback) callback(err.message);
+	    });
+	  }
+	};
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-buttons');  // preserve space
+	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;
 
-	        // Tag list items
-	        var items = list.selectAll('.tag-row')
-	            .data(rowData, function(d) { return d.key; });
+	var _oscSelectedImage;
 
-	        items.exit()
-	            .each(unbind)
-	            .remove();
+	var _loadViewerPromise$1;
 
+	function abortRequest$4(controller) {
+	  controller.abort();
+	}
 
-	        // Enter
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'tag-row')
-	            .classed('readonly', isReadOnly);
+	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;
+	}
 
-	        var innerWrap = itemsEnter.append('div')
-	            .attr('class', 'inner-wrap');
+	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
 
-	        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);
-	                }
+	  var cache = _oscCache[which];
+	  Object.keys(cache.inflight).forEach(function (k) {
+	    var wanted = tiles.find(function (tile) {
+	      return k.indexOf(tile.id + ',') === 0;
+	    });
 
-	                var reference;
+	    if (!wanted) {
+	      abortRequest$4(cache.inflight[k]);
+	      delete cache.inflight[k];
+	    }
+	  });
+	  tiles.forEach(function (tile) {
+	    loadNextTilePage$1(which, currZoom, url, tile);
+	  });
+	}
 
-	                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 });
-	                    }
-	                }
+	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];
 
-	                if (_state === 'hover') {
-	                    reference.showing(false);
-	                }
+	    if (!data || !data.currentPageItems || !data.currentPageItems.length) {
+	      throw new Error('No Data');
+	    }
 
-	                row.select('.inner-wrap')      // propagate bound data
-	                    .call(reference.button);
+	    var features = data.currentPageItems.map(function (item) {
+	      var loc = [+item.lng, +item.lat];
+	      var d;
 
-	                row.call(reference.body);
+	      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
 
-	                row.select('button.remove');   // propagate bound data
-	            });
+	        var seq = _oscCache.sequences[d.sequence_id];
 
-	        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;
-	            });
+	        if (!seq) {
+	          seq = {
+	            rotation: 0,
+	            images: []
+	          };
+	          _oscCache.sequences[d.sequence_id] = seq;
+	        }
 
-	        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;
-	            });
+	        seq.images[d.sequence_index] = d;
+	        _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
+	      }
 
-	        items.selectAll('button.remove')
-	            .on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'down', removeTag);  // 'click' fires too late - #5878
+	      return {
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      };
+	    });
+	    cache.rtree.load(features);
 
+	    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
 	    }
 
-	    function isReadOnly(d) {
-	        for (var i = 0; i < _readOnlyTags.length; i++) {
-	            if (d.key.match(_readOnlyTags[i]) !== null) {
-	                return true;
-	            }
-	        }
-	        return false;
+	    if (which === 'images') {
+	      dispatch$5.call('loadedImages');
 	    }
+	  })["catch"](function () {
+	    cache.loaded[id] = true;
+	    delete cache.inflight[id];
+	  });
+	} // partition viewport into higher zoom tiles
 
-	    function setTextareaHeight() {
-	        if (_tagView !== 'text') { return; }
 
-	        var selection = select(this);
-	        selection.style('height', null);
-	        selection.style('height', selection.node().scrollHeight + 5 + 'px');
-	    }
+	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
 
-	    function stringify(s) {
-	        return JSON.stringify(s).slice(1, -1);   // without leading/trailing "
-	    }
+	  var tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // no more than `limit` results per partition.
 
-	    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);
-	    }
 
-	    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');
+	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;
+	  }, []);
+	}
 
-	        if (_state !== 'hover' && str.length) {
-	            return str + '\n';
-	        }
-	        return  str;
+	var serviceOpenstreetcam = {
+	  init: function init() {
+	    if (!_oscCache) {
+	      this.reset();
 	    }
 
-	    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; }
+	    this.event = utilRebind(this, dispatch$5, 'on');
+	  },
+	  reset: function reset() {
+	    if (_oscCache) {
+	      Object.values(_oscCache.images.inflight).forEach(abortRequest$4);
+	    }
 
-	        _pendingChange  = _pendingChange || {};
+	    _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
 
-	        tagDiff.forEach(function(change) {
-	            if (isReadOnly({ key: change.key })) { return; }
+	    _oscCache.images.rtree.search(bbox).forEach(function (d) {
+	      sequenceKeys[d.data.sequence_id] = true;
+	    }); // make linestrings from those sequences
 
-	            // 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 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
 
-	        if (Object.keys(_pendingChange).length === 0) {
-	            _pendingChange = null;
-	            return;
-	        }
+	    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);
+	    });
 
-	        scheduleChange();
+	    function zoomPan(d3_event) {
+	      var t = d3_event.transform;
+	      context.container().select('.photoviewer .osc-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
 	    }
 
-	    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 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)');
+	      };
 	    }
 
-	    function bindTypeahead(key, value) {
-	        if (isReadOnly(key.datum())) { return; }
-
-	        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;
-	        }
+	    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
 
-	        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));
-	                    }
-	                });
-	            }));
+	    _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();
 
-	        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)); }
-	                });
-	            }));
+	    if (isHidden) {
+	      viewer.selectAll('.photo-wrapper:not(.osc-wrapper)').classed('hide', true);
+	      viewer.selectAll('.photo-wrapper.osc-wrapper').classed('hide', false);
+	    }
 
+	    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();
 
-	        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 (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 unbind() {
-	        var row = select(this);
+	      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('|');
+	      }
 
-	        row.selectAll('input.key')
-	            .call(uiCombobox.off, context);
+	      if (d.captured_at) {
+	        attribution.append('span').attr('class', 'captured_at').html(localeDateString(d.captured_at));
+	        attribution.append('span').html('|');
+	      }
 
-	        row.selectAll('input.value')
-	            .call(uiCombobox.off, context);
+	      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');
 	    }
 
-	    function keyChange(d) {
-	        if (select(this).attr('readonly')) { return; }
-
-	        var kOld = d.key;
+	    return this;
 
-	        // exit if we are currently about to delete this row anyway - #6366
-	        if (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) { 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);
+	    }
+	  },
+	  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
 
-	        var kNew = context.cleanTagKey(this.value.trim());
+	    context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
 
-	        // allow no change if the key should be readonly
-	        if (isReadOnly({ key: kNew })) {
-	            this.value = kOld;
-	            return;
-	        }
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	        if (kNew &&
-	            kNew !== kOld &&
-	            _tags[kNew] !== undefined) {
-	            // new key is already in use, switch focus to the existing row
+	      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.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;
-	        }
+	    return this;
+	  },
+	  updateUrlImage: function updateUrlImage(imageKey) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
+	      if (imageKey) {
+	        hash.photo = 'openstreetcam/' + imageKey;
+	      } else {
+	        delete hash.photo;
+	      }
 
-	        var row = this.parentNode.parentNode;
-	        var inputVal = select(row).selectAll('input.value');
-	        var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
+	  },
+	  cache: function cache() {
+	    return _oscCache;
+	  }
+	};
 
-	        _pendingChange = _pendingChange || {};
+	var FORCED$f = fails(function () {
+	  return new Date(NaN).toJSON() !== null
+	    || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
+	});
 
-	        if (kOld) {
-	            _pendingChange[kOld] = undefined;
-	        }
+	// `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();
+	  }
+	});
 
-	        _pendingChange[kNew] = vNew;
+	// `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);
+	  }
+	});
 
-	        // update the ordered key index so this row doesn't change position
-	        var existingKeyIndex = _orderedKeys.indexOf(kOld);
-	        if (existingKeyIndex !== -1) { _orderedKeys[existingKeyIndex] = kNew; }
+	/**
+	 * 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);
 
-	        d.key = kNew;    // update datum to avoid exit/enter on tag update
-	        d.value = vNew;
+	  return value != null && (type == 'object' || type == 'function');
+	}
 
-	        this.value = kNew;
-	        utilGetSetValue(inputVal, vNew);
-	        scheduleChange();
-	    }
+	/** Detect free variable `global` from Node.js. */
+	var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;
 
-	    function valueChange(d) {
-	        if (isReadOnly(d)) { return; }
+	/** Detect free variable `self`. */
 
-	        // exit if this is a multiselection and no value was entered
-	        if (typeof d.value !== 'string' && !this.value) { return; }
+	var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
+	/** Used as a reference to the global object. */
 
-	        // exit if we are currently about to delete this row anyway - #6366
-	        if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) { return; }
+	var root$1 = freeGlobal || freeSelf || Function('return this')();
 
-	        _pendingChange = _pendingChange || {};
+	/**
+	 * 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.
+	 */
 
-	        _pendingChange[d.key] = context.cleanTagValue(this.value);
-	        scheduleChange();
-	    }
+	var now$1 = function now() {
+	  return root$1.Date.now();
+	};
 
-	    function removeTag(d) {
-	        if (isReadOnly(d)) { return; }
+	/** Built-in value references. */
 
-	        if (d.key === '') {    // removing the blank row
-	            _showBlank = false;
-	            section.reRender();
+	var _Symbol = root$1.Symbol;
 
-	        } else {
-	            // remove the key from the ordered key index
-	            _orderedKeys = _orderedKeys.filter(function(key) { return key !== d.key; });
+	/** Used for built-in method references. */
 
-	            _pendingChange  = _pendingChange || {};
-	            _pendingChange[d.key] = undefined;
-	            scheduleChange();
-	        }
-	    }
+	var objectProto = Object.prototype;
+	/** Used to check objects for own properties. */
 
-	    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 hasOwnProperty$1 = objectProto.hasOwnProperty;
+	/**
+	 * Used to resolve the
+	 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+	 * of values.
+	 */
 
-	    function scheduleChange() {
-	        // Cache IDs in case the editor is reloaded before the change event is called. - #6028
-	        var entityIDs = _entityIDs;
+	var nativeObjectToString = objectProto.toString;
+	/** Built-in value references. */
 
-	        // Delay change in case this change is blurring an edited combo. - #5878
-	        window.setTimeout(function() {
-	            if (!_pendingChange) { return; }
+	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`.
+	 */
 
-	            dispatch$1.call('change', this, entityIDs, _pendingChange);
-	            _pendingChange = null;
-	        }, 10);
-	    }
+	function getRawTag(value) {
+	  var isOwn = hasOwnProperty$1.call(value, symToStringTag),
+	      tag = value[symToStringTag];
 
+	  try {
+	    value[symToStringTag] = undefined;
+	    var unmasked = true;
+	  } catch (e) {}
 
-	    section.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        if (_state !== val) {
-	            _orderedKeys = [];
-	            _state = val;
-	        }
-	        return section;
-	    };
+	  var result = nativeObjectToString.call(value);
 
+	  if (unmasked) {
+	    if (isOwn) {
+	      value[symToStringTag] = tag;
+	    } else {
+	      delete value[symToStringTag];
+	    }
+	  }
 
-	    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);
-	        }
-	        return section;
-	    };
+	  return result;
+	}
 
+	/** 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.
+	 */
 
-	    section.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-	        return section;
-	    };
+	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.
+	 */
 
+	function objectToString$1(value) {
+	  return nativeObjectToString$1.call(value);
+	}
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-	            _entityIDs = val;
-	            _orderedKeys = [];
-	        }
-	        return section;
-	    };
+	/** `Object#toString` result references. */
 
+	var nullTag = '[object Null]',
+	    undefinedTag = '[object Undefined]';
+	/** Built-in value references. */
 
-	    // 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;
-	    };
+	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`.
+	 */
 
+	function baseGetTag(value) {
+	  if (value == null) {
+	    return value === undefined ? undefinedTag : nullTag;
+	  }
 
-	    return utilRebind(section, dispatch$1, 'on');
+	  return symToStringTag$1 && symToStringTag$1 in Object(value) ? getRawTag(value) : objectToString$1(value);
 	}
 
-	function uiDataEditor(context) {
-	    var dataHeader = uiDataHeader();
-	    var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context)
-	        .expandedByDefault(true)
-	        .readOnlyTags([/./]);
-	    var _datum;
+	/**
+	 * 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';
+	}
 
+	/** `Object#toString` result references. */
 
-	    function dataEditor(selection) {
+	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
+	 */
 
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	function isSymbol$1(value) {
+	  return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
+	}
 
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL');
+	/** Used as references for various `Number` constants. */
 
-	        headerEnter
-	            .append('button')
-	            .attr('class', 'close')
-	            .on('click', function() {
-	                context.enter(modeBrowse(context));
-	            })
-	            .call(svgIcon('#iD-icon-close'));
+	var NAN = 0 / 0;
+	/** Used to match leading and trailing whitespace. */
 
-	        headerEnter
-	            .append('h3')
-	            .text(_t('map_data.title'));
+	var reTrim = /^\s+|\s+$/g;
+	/** Used to detect bad signed hexadecimal string values. */
 
+	var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+	/** Used to detect binary string values. */
 
-	        var body = selection.selectAll('.body')
-	            .data([0]);
+	var reIsBinary = /^0b[01]+$/i;
+	/** Used to detect octal string values. */
 
-	        body = body.enter()
-	            .append('div')
-	            .attr('class', 'body')
-	            .merge(body);
+	var reIsOctal = /^0o[0-7]+$/i;
+	/** Built-in method references without a dependency on `root`. */
 
-	        var editor = body.selectAll('.data-editor')
-	            .data([0]);
+	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
+	 */
 
-	        // enter/update
-	        editor.enter()
-	            .append('div')
-	            .attr('class', 'modal-section data-editor')
-	            .merge(editor)
-	            .call(dataHeader.datum(_datum));
+	function toNumber$1(value) {
+	  if (typeof value == 'number') {
+	    return value;
+	  }
 
-	        var rte = body.selectAll('.raw-tag-editor')
-	            .data([0]);
+	  if (isSymbol$1(value)) {
+	    return NAN;
+	  }
 
-	        // 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 (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 dataEditor;
+	  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 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(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);
-	        }
-	    }
-
-
-	    function esc() {
-	        if (context.container().select('.combobox').size()) { return; }
-	        context.enter(modeBrowse(context));
-	    }
+	/** Error message constants. */
 
+	var FUNC_ERROR_TEXT = 'Expected a function';
+	/* Built-in method references for those with the same name as other `lodash` methods. */
 
-	    mode.zoomToSelected = function() {
-	        var extent = geoExtent(d3_geoBounds(selectedDatum));
-	        context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
-	    };
+	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);
+	 */
 
+	function debounce(func, wait, options) {
+	  var lastArgs,
+	      lastThis,
+	      maxWait,
+	      result,
+	      timerId,
+	      lastCallTime,
+	      lastInvokeTime = 0,
+	      leading = false,
+	      maxing = false,
+	      trailing = true;
 
-	    mode.enter = function() {
-	        behaviors.forEach(context.install);
+	  if (typeof func != 'function') {
+	    throw new TypeError(FUNC_ERROR_TEXT);
+	  }
 
-	        keybinding
-	            .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-	            .on('⎋', esc, true);
+	  wait = toNumber$1(wait) || 0;
 
-	        select(document)
-	            .call(keybinding);
+	  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;
+	  }
 
-	        selectData();
+	  function invokeFunc(time) {
+	    var args = lastArgs,
+	        thisArg = lastThis;
+	    lastArgs = lastThis = undefined;
+	    lastInvokeTime = time;
+	    result = func.apply(thisArg, args);
+	    return result;
+	  }
 
-	        var sidebar = context.ui().sidebar;
-	        sidebar.show(dataEditor.datum(selectedDatum));
+	  function leadingEdge(time) {
+	    // Reset any `maxWait` timer.
+	    lastInvokeTime = time; // Start the timer for the trailing edge.
 
-	        // expand the sidebar, avoid obscuring the data if needed
-	        var extent = geoExtent(d3_geoBounds(selectedDatum));
-	        sidebar.expand(sidebar.intersects(extent));
+	    timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
 
-	        context.map()
-	            .on('drawn.select-data', selectData);
-	    };
+	    return leading ? invokeFunc(time) : result;
+	  }
 
+	  function remainingWait(time) {
+	    var timeSinceLastCall = time - lastCallTime,
+	        timeSinceLastInvoke = time - lastInvokeTime,
+	        timeWaiting = wait - timeSinceLastCall;
+	    return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
+	  }
 
-	    mode.exit = function() {
-	        behaviors.forEach(context.uninstall);
+	  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.
 
-	        select(document)
-	            .call(keybinding.unbind);
+	    return lastCallTime === undefined || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
+	  }
 
-	        context.surface()
-	            .selectAll('.layer-mapdata .selected')
-	            .classed('selected hover', false);
+	  function timerExpired() {
+	    var time = now$1();
 
-	        context.map()
-	            .on('drawn.select-data', null);
+	    if (shouldInvoke(time)) {
+	      return trailingEdge(time);
+	    } // Restart the timer.
 
-	        context.ui().sidebar
-	            .hide();
-	    };
 
+	    timerId = setTimeout(timerExpired, remainingWait(time));
+	  }
 
-	    return mode;
-	}
+	  function trailingEdge(time) {
+	    timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
+	    // debounced at least once.
 
-	function uiImproveOsmComments() {
-	  var _qaItem;
+	    if (trailing && lastArgs) {
+	      return invokeFunc(time);
+	    }
 
-	  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; });
-	            });
+	    lastArgs = lastThis = undefined;
+	    return result;
+	  }
 
-	        metadataEnter
-	          .append('div')
-	            .attr('class', 'comment-date')
-	            .text(function (d) { return _t('note.status.commented', { when: localeDateString(d.timestamp) }); });
+	  function cancel() {
+	    if (timerId !== undefined) {
+	      clearTimeout(timerId);
+	    }
 
-	        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
-	    });
+	    lastInvokeTime = 0;
+	    lastArgs = lastCallTime = lastThis = timerId = undefined;
 	  }
 
-	  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);
+	  function flush() {
+	    return timerId === undefined ? result : trailingEdge(now$1());
 	  }
 
-	  issueComments.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return issueComments;
-	  };
+	  function debounced() {
+	    var time = now$1(),
+	        isInvoking = shouldInvoke(time);
+	    lastArgs = arguments;
+	    lastThis = this;
+	    lastCallTime = time;
 
-	  return issueComments;
-	}
+	    if (isInvoking) {
+	      if (timerId === undefined) {
+	        return leadingEdge(lastCallTime);
+	      }
 
-	function uiImproveOsmDetails(context) {
-	  var _qaItem;
+	      if (maxing) {
+	        // Handle invocations in a tight loop.
+	        clearTimeout(timerId);
+	        timerId = setTimeout(timerExpired, wait);
+	        return invokeFunc(lastCallTime);
+	      }
+	    }
 
+	    if (timerId === undefined) {
+	      timerId = setTimeout(timerExpired, wait);
+	    }
 
-	  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);
+	    return result;
 	  }
 
+	  debounced.cancel = cancel;
+	  debounced.flush = flush;
+	  return debounced;
+	}
 
-	  function improveOsmDetails(selection) {
-	    var details = selection.selectAll('.error-details')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (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')
-	        .text(function () { return _t('QA.keepRight.detail_description'); });
+	/** Error message constants. */
 
-	    descriptionEnter
-	      .append('div')
-	        .attr('class', 'qa-details-description-text')
-	        .html(issueDetail);
+	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);
+	 */
 
-	    // 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);
+	function throttle(func, wait, options) {
+	  var leading = true,
+	      trailing = true;
 
-	        relatedEntities.push(entityID);
+	  if (typeof func != 'function') {
+	    throw new TypeError(FUNC_ERROR_TEXT$1);
+	  }
 
-	        // Add click handler
-	        link
-	          .on('mouseenter', function () {
-	            utilHighlightEntities([entityID], true, context);
-	          })
-	          .on('mouseleave', function () {
-	            utilHighlightEntities([entityID], false, context);
-	          })
-	          .on('click', function () {
-	            event.preventDefault();
+	  if (isObject$1(options)) {
+	    leading = 'leading' in options ? !!options.leading : leading;
+	    trailing = 'trailing' in options ? !!options.trailing : trailing;
+	  }
 
-	            utilHighlightEntities([entityID], false, context);
+	  return debounce(func, wait, {
+	    'leading': leading,
+	    'maxWait': wait,
+	    'trailing': trailing
+	  });
+	}
 
-	            var osmlayer = context.layers().layer('osm');
-	            if (!osmlayer.enabled()) {
-	              osmlayer.enabled(true);
-	            }
+	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;
 
-	            context.map().centerZoom(_qaItem.loc, 20);
+	    function utf8Encode(str) {
+	      var x,
+	          y,
+	          output = '',
+	          i = -1,
+	          l;
 
-	            if (entity) {
-	              context.enter(modeSelect(context, [entityID]));
-	            } else {
-	              context.loadEntity(entityID, function () {
-	                context.enter(modeSelect(context, [entityID]));
-	              });
-	            }
-	          });
+	      if (str && str.length) {
+	        l = str.length;
 
-	        // 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
+	        while ((i += 1) < l) {
+	          /* Decode utf-16 surrogate pairs */
+	          x = str.charCodeAt(i);
+	          y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
 
-	          if (!name && !isObjectLink) {
-	            var preset = _mainPresetIndex.match(entity, context.graph());
-	            name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
+	          if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
+	            x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
+	            i += 1;
 	          }
+	          /* Encode output as utf-8 */
 
-	          if (name) {
-	            this.innerText = name;
+
+	          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);
 	          }
 	        }
-	      });
-
-	    // Don't hide entities related to this error - #5880
-	    context.features().forceVisible(relatedEntities);
-	    context.map().pan([0,0]);  // trigger a redraw
-	  }
-
-	  improveOsmDetails.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return improveOsmDetails;
-	  };
-
-	  return improveOsmDetails;
-	}
-
-	function uiImproveOsmHeader() {
-	  var _qaItem;
+	      }
 
+	      return output;
+	    }
 
-	  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);
-	  }
+	    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 += '';
 
-	  function improveOsmHeader(selection) {
-	    var header = selection.selectAll('.qa-header')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	        while (i < l) {
+	          c1 = str.charCodeAt(i);
+	          ac += 1;
 
-	    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 '';
+	          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 {
-	            var isMaki = /^maki-/.test(picon);
-	            return ("#" + picon + (isMaki ? '-11' : ''));
+	            c2 = str.charCodeAt(i + 1);
+	            c3 = str.charCodeAt(i + 2);
+	            arr[ac] = String.fromCharCode((c1 & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
+	            i += 3;
 	          }
-	        });
+	        }
+	      }
 
-	    headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-label')
-	        .text(issueTitle);
-	  }
+	      return arr.join('');
+	    }
+	    /**
+	     * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+	     * to work around bugs in some JS interpreters.
+	     */
 
-	  improveOsmHeader.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return improveOsmHeader;
-	  };
 
-	  return improveOsmHeader;
-	}
+	    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.
+	     */
 
-	function uiImproveOsmEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiImproveOsmDetails(context);
-	  var qaComments = uiImproveOsmComments();
-	  var qaHeader = uiImproveOsmHeader();
 
-	  var _qaItem;
+	    function bit_rol(num, cnt) {
+	      return num << cnt | num >>> 32 - cnt;
+	    }
+	    /**
+	     * Convert a raw string to a hex string
+	     */
 
-	  function improveOsmEditor(selection) {
 
-	    var headerEnter = selection.selectAll('.header')
-	      .data([0])
-	      .enter()
-	      .append('div')
-	        .attr('class', 'header fillL');
+	    function rstr2hex(input, hexcase) {
+	      var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
+	          output = '',
+	          x,
+	          i = 0,
+	          l = input.length;
 
-	    headerEnter
-	      .append('button')
-	        .attr('class', 'close')
-	        .on('click', function () { return context.enter(modeBrowse(context)); })
-	        .call(svgIcon('#iD-icon-close'));
+	      for (; i < l; i += 1) {
+	        x = input.charCodeAt(i);
+	        output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
+	      }
 
-	    headerEnter
-	      .append('h3')
-	        .text(_t('QA.improveOSM.title'));
+	      return output;
+	    }
+	    /**
+	     * Convert an array of big-endian words to a string
+	     */
 
-	    var body = selection.selectAll('.body')
-	      .data([0]);
 
-	    body = body.enter()
-	      .append('div')
-	        .attr('class', 'body')
-	      .merge(body);
+	    function binb2rstr(input) {
+	      var i,
+	          l = input.length * 32,
+	          output = '';
 
-	    var editor = body.selectAll('.qa-editor')
-	      .data([0]);
+	      for (i = 0; i < l; i += 8) {
+	        output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
+	      }
 
-	    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);
-	  }
+	      return output;
+	    }
+	    /**
+	     * Convert an array of little-endian words to a string
+	     */
 
-	  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)); }
-	      );
 
-	    // exit
-	    saveSection.exit()
-	      .remove();
+	    function binl2rstr(input) {
+	      var i,
+	          l = input.length * 32,
+	          output = '';
 
-	    // 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);
+	      for (i = 0; i < l; i += 8) {
+	        output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+	      }
 
-	    // update
-	    saveSection = saveSectionEnter
-	      .merge(saveSection)
-	        .call(qaSaveButtons);
+	      return output;
+	    }
+	    /**
+	     * Convert a raw string to an array of little-endian words
+	     * Characters >255 have their high-byte silently ignored.
+	     */
 
-	    function changeInput() {
-	      var input = select(this);
-	      var val = input.property('value').trim();
 
-	      if (val === '') {
-	        val = undefined;
-	      }
+	    function rstr2binl(input) {
+	      var i,
+	          l = input.length * 8,
+	          output = Array(input.length >> 2),
+	          lo = output.length;
 
-	      // store the unsaved comment with the issue itself
-	      _qaItem = _qaItem.update({ newComment: val });
+	      for (i = 0; i < lo; i += 1) {
+	        output[i] = 0;
+	      }
 
-	      var qaService = services.improveOSM;
-	      if (qaService) {
-	        qaService.replaceItem(_qaItem);
+	      for (i = 0; i < l; i += 8) {
+	        output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
 	      }
 
-	      saveSection
-	        .call(qaSaveButtons);
+	      return output;
 	    }
-	  }
-
-	  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 comment-button action')
-	        .text(_t('QA.keepRight.save_comment'));
+	    /**
+	     * Convert a raw string to an array of big-endian words
+	     * Characters >255 have their high-byte silently ignored.
+	     */
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button close-button action');
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button ignore-button action');
+	    function rstr2binb(input) {
+	      var i,
+	          l = input.length * 8,
+	          output = Array(input.length >> 2),
+	          lo = output.length;
 
-	    // update
-	    buttonSection = buttonSection
-	      .merge(buttonEnter);
+	      for (i = 0; i < lo; i += 1) {
+	        output[i] = 0;
+	      }
 
-	    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); });
-	        }
-	      });
+	      for (i = 0; i < l; i += 8) {
+	        output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
+	      }
 
-	    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); });
-	        }
-	      });
+	      return output;
+	    }
+	    /**
+	     * Convert a raw string to an arbitrary string encoding
+	     */
 
-	    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); });
-	        }
-	      });
-	  }
 
-	  // NOTE: Don't change method name until UI v3 is merged
-	  improveOsmEditor.error = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return improveOsmEditor;
-	  };
+	    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.
+	       */
 
-	  return utilRebind(improveOsmEditor, dispatch$1, 'on');
-	}
 
-	function uiKeepRightDetails(context) {
-	  var _qaItem;
+	      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 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 (quotient.length > 0 || q > 0) {
+	            quotient[quotient.length] = q;
+	          }
+	        }
 
-	    var detail = _t(("QA.keepRight.errorTypes." + itemType + ".description"), replacements);
-	    if (detail === unknown) {
-	      detail = _t(("QA.keepRight.errorTypes." + parentIssueType + ".description"), replacements);
-	    }
-	    return detail;
-	  }
+	        remainders[remainders.length] = x;
+	        dividend = quotient;
+	      }
+	      /* Convert the remainders to the output string */
 
 
-	  function keepRightDetails(selection) {
-	    var details = selection.selectAll('.error-details')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	      output = '';
 
-	    details.exit()
-	      .remove();
+	      for (i = remainders.length - 1; i >= 0; i--) {
+	        output += encoding.charAt(remainders[i]);
+	      }
+	      /* Append leading zero equivalents */
 
-	    var detailsEnter = details.enter()
-	      .append('div')
-	        .attr('class', 'error-details qa-details-container');
 
-	    // description
-	    var descriptionEnter = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	      full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
 
-	    descriptionEnter
-	      .append('h4')
-	        .text(function () { return _t('QA.keepRight.detail_description'); });
+	      for (i = output.length; i < full_length; i += 1) {
+	        output = encoding[0] + output;
+	      }
 
-	    descriptionEnter
-	      .append('div')
-	        .attr('class', 'qa-details-description-text')
-	        .html(issueDetail);
+	      return output;
+	    }
+	    /**
+	     * Convert a raw string to a base-64 string
+	     */
 
-	    // 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);
 
-	        relatedEntities.push(entityID);
+	    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);
+	          }
+	        }
+	      }
 
-	        // Add click handler
-	        link
-	          .on('mouseenter', function () {
-	            utilHighlightEntities([entityID], true, context);
-	          })
-	          .on('mouseleave', function () {
-	            utilHighlightEntities([entityID], false, context);
-	          })
-	          .on('click', function () {
-	            event.preventDefault();
+	      return output;
+	    }
 
-	            utilHighlightEntities([entityID], false, context);
+	    Hashes = {
+	      /**
+	       * @property {String} version
+	       * @readonly
+	       */
+	      VERSION: '1.0.6',
 
-	            var osmlayer = context.layers().layer('osm');
-	            if (!osmlayer.enabled()) {
-	              osmlayer.enabled(true);
+	      /**
+	       * @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);
+	              }
 	            }
+	          }
 
-	            context.map().centerZoomEase(_qaItem.loc, 20);
+	          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 (entity) {
-	              context.enter(modeSelect(context, [entityID]));
+	          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 {
-	              context.loadEntity(entityID, function () {
-	                context.enter(modeSelect(context, [entityID]));
-	              });
+	              arr[ac] = String.fromCharCode(o1, o2, o3);
 	            }
-	          });
+	          } while (i < input.length);
 
-	        // 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
+	          dec = arr.join('');
+	          dec = utf8 ? utf8Decode(dec) : dec;
+	          return dec;
+	        }; // set custom pad string
 
-	          if (!name && !isObjectLink) {
-	            var preset = _mainPresetIndex.match(entity, context.graph());
-	            name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-	          }
 
-	          if (name) {
-	            this.innerText = name;
-	          }
-	        }
-	      });
+	        this.setPad = function (str) {
+	          pad = str || pad;
+	          return this;
+	        }; // set custom tab string characters
 
-	    // Don't hide entities related to this issue - #5880
-	    context.features().forceVisible(relatedEntities);
-	    context.map().pan([0,0]);  // trigger a redraw
-	  }
 
-	  keepRightDetails.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return keepRightDetails;
-	  };
+	        this.setTab = function (str) {
+	          tab = str || tab;
+	          return this;
+	        };
 
-	  return keepRightDetails;
-	}
+	        this.setUTF8 = function (bool) {
+	          if (typeof bool === 'boolean') {
+	            utf8 = bool;
+	          }
 
-	function uiKeepRightHeader() {
-	  var _qaItem;
+	          return this;
+	        };
+	      },
 
+	      /**
+	       * 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;
+	      },
 
-	  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
+	      /**
+	       * @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);
+	        };
 
-	    var title = _t(("QA.keepRight.errorTypes." + itemType + ".title"), replacements);
-	    if (title === unknown) {
-	      title = _t(("QA.keepRight.errorTypes." + parentIssueType + ".title"), replacements);
-	    }
-	    return title;
-	  }
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	  function keepRightHeader(selection) {
-	    var header = selection.selectAll('.qa-header')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	    header.exit()
-	      .remove();
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d), hexcase);
+	        };
 
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'qa-header');
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	    var iconEnter = headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-icon')
-	        .classed('new', function (d) { return d.id < 0; });
+	        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
+	         */
 
-	    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'));
 
-	    headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-label')
-	        .text(issueTitle);
-	  }
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * Enable/disable uppercase hexadecimal returned string
+	         * @param {Boolean}
+	         * @return {Object} this
+	         */
 
 
-	  keepRightHeader.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return keepRightHeader;
-	  };
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	  return keepRightHeader;
-	}
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {String} Pad
+	         * @return {Object} this
+	         */
 
-	function uiViewOnKeepRight() {
-	  var _qaItem;
 
-	  function viewOnKeepRight(selection) {
-	    var url;
-	    if (services.keepRight && (_qaItem instanceof QAItem)) {
-	      url = services.keepRight.issueURL(_qaItem);
-	    }
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {Boolean}
+	         * @return {Object} [this]
+	         */
 
-	    var link = selection.selectAll('.view-on-keepRight')
-	      .data(url ? [url] : []);
 
-	    // exit
-	    link.exit()
-	      .remove();
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	    // 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'));
+	          return this;
+	        }; // private methods
 
-	    linkEnter
-	      .append('span')
-	        .text(_t('inspector.view_on_keepRight'));
-	  }
+	        /**
+	         * Calculate the MD5 of a raw string
+	         */
 
-	  viewOnKeepRight.what = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return viewOnKeepRight;
-	  };
 
-	  return viewOnKeepRight;
-	}
+	        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)
+	         */
 
-	function uiKeepRightEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiKeepRightDetails(context);
-	  var qaHeader = uiKeepRightHeader();
 
-	  var _qaItem;
+	        function rstr_hmac(key, data) {
+	          var bkey, ipad, opad, hash, i;
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          bkey = rstr2binl(key);
 
-	  function keepRightEditor(selection) {
+	          if (bkey.length > 16) {
+	            bkey = binl(bkey, key.length * 8);
+	          }
 
-	    var headerEnter = selection.selectAll('.header')
-	      .data([0])
-	      .enter()
-	      .append('div')
-	        .attr('class', 'header fillL');
+	          ipad = Array(16), opad = Array(16);
 
-	    headerEnter
-	      .append('button')
-	        .attr('class', 'close')
-	        .on('click', function () { return context.enter(modeBrowse(context)); })
-	        .call(svgIcon('#iD-icon-close'));
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	    headerEnter
-	      .append('h3')
-	        .text(_t('QA.keepRight.title'));
+	          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);
+	          }
 
+	          return Array(a, b, c, d);
+	        }
+	        /**
+	         * These functions implement the four basic operations the algorithm uses.
+	         */
 
-	    var body = selection.selectAll('.body')
-	      .data([0]);
 
-	    body = body.enter()
-	      .append('div')
-	        .attr('class', 'body')
-	      .merge(body);
+	        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 editor = body.selectAll('.qa-editor')
-	      .data([0]);
+	        function md5_ff(a, b, c, d, x, s, t) {
+	          return md5_cmn(b & c | ~b & d, a, b, x, s, t);
+	        }
 
-	    editor.enter()
-	      .append('div')
-	        .attr('class', 'modal-section qa-editor')
-	      .merge(editor)
-	        .call(qaHeader.issue(_qaItem))
-	        .call(qaDetails.issue(_qaItem))
-	        .call(keepRightSaveSection);
+	        function md5_gg(a, b, c, d, x, s, t) {
+	          return md5_cmn(b & d | c & ~d, a, b, x, s, t);
+	        }
 
+	        function md5_hh(a, b, c, d, x, s, t) {
+	          return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+	        }
 
-	    var footer = selection.selectAll('.footer')
-	      .data([0]);
+	        function md5_ii(a, b, c, d, x, s, t) {
+	          return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
+	        }
+	      },
 
-	    footer.enter()
-	      .append('div')
-	      .attr('class', 'footer')
-	      .merge(footer)
-	      .call(uiViewOnKeepRight().what(_qaItem));
-	  }
+	      /**
+	       * @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);
+	        };
 
-	  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)); }
-	      );
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	    // exit
-	    saveSection.exit()
-	      .remove();
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	    // 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);
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	    // update
-	    saveSection = saveSectionEnter
-	      .merge(saveSection)
-	        .call(qaSaveButtons);
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	    function changeInput() {
-	      var input = select(this);
-	      var val = input.property('value').trim();
+	        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
+	         */
 
-	      if (val === _qaItem.comment) {
-	        val = undefined;
-	      }
 
-	      // store the unsaved comment with the issue itself
-	      _qaItem = _qaItem.update({ newComment: val });
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	      var qaService = services.keepRight;
-	      if (qaService) {
-	        qaService.replaceItem(_qaItem);  // update keepright cache
-	      }
 
-	      saveSection
-	        .call(qaSaveButtons);
-	    }
-	  }
+	        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
+	         */
 
-	  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();
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    // enter
-	    var buttonEnter = buttonSection.enter()
-	      .append('div')
-	        .attr('class', 'buttons');
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button comment-button action')
-	        .text(_t('QA.keepRight.save_comment'));
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button close-button action');
+	          return this;
+	        }; // private methods
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button ignore-button action');
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
-	    // update
-	    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(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); });
+	        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)
+	         */
 
-	    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); });
-	        }
-	      });
 
-	    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); });
-	        }
-	      });
-	  }
+	        function rstr_hmac(key, data) {
+	          var bkey, ipad, opad, i, hash;
+	          key = utf8 ? utf8Encode(key) : key;
+	          data = utf8 ? utf8Encode(data) : data;
+	          bkey = rstr2binb(key);
 
-	  // NOTE: Don't change method name until UI v3 is merged
-	  keepRightEditor.error = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return keepRightEditor;
-	  };
+	          if (bkey.length > 16) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	  return utilRebind(keepRightEditor, dispatch$1, 'on');
-	}
+	          ipad = Array(16), opad = Array(16);
 
-	function uiOsmoseDetails(context) {
-	  var _qaItem;
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	  function issueString(d, type) {
-	    if (!d) { return ''; }
+	          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);
+	              }
 
-	    // Issue strings are cached from Osmose API
-	    var s = services.osmose.getStrings(d.itemType);
-	    return (type in s) ? s[type] : '';
-	  }
+	              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);
+	          }
 
-	  function osmoseDetails(selection) {
-	    var details = selection.selectAll('.error-details')
-	      .data(
-	        _qaItem ? [_qaItem] : [],
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	          return Array(a, b, c, d, e);
+	        }
+	        /**
+	         * Perform the appropriate triplet combination function for the current
+	         * iteration
+	         */
 
-	    details.exit()
-	      .remove();
 
-	    var detailsEnter = details.enter()
-	      .append('div')
-	        .attr('class', 'error-details qa-details-container');
+	        function sha1_ft(t, b, c, d) {
+	          if (t < 20) {
+	            return b & c | ~b & d;
+	          }
 
+	          if (t < 40) {
+	            return b ^ c ^ d;
+	          }
 
-	    // Description
-	    if (issueString(_qaItem, 'detail')) {
-	      var div = detailsEnter
-	        .append('div')
-	          .attr('class', 'qa-details-subsection');
+	          if (t < 60) {
+	            return b & c | b & d | c & d;
+	          }
 
-	      div
-	        .append('h4')
-	          .text(function () { return _t('QA.keepRight.detail_description'); });
+	          return b ^ c ^ d;
+	        }
+	        /**
+	         * Determine the appropriate additive constant for the current iteration
+	         */
 
-	      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)
-	    var detailsDiv = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	        function sha1_kt(t) {
+	          return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
+	        }
+	      },
 
-	    var elemsDiv = detailsEnter
-	      .append('div')
-	        .attr('class', 'qa-details-subsection');
+	      /**
+	       * @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 : '=',
 
-	    // Suggested Fix (musn't exist for every issue type)
-	    if (issueString(_qaItem, 'fix')) {
-	      var div$1 = detailsEnter
-	        .append('div')
-	          .attr('class', 'qa-details-subsection');
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-	      div$1
-	        .append('h4')
-	          .text(function () { return _t('QA.osmose.fix_title'); });
+	        /* enable/disable utf8 encoding */
+	        sha256_K;
+	        /* privileged (public) methods */
 
-	      div$1
-	        .append('p')
-	          .html(function (d) { return issueString(d, 'fix'); })
-	        .selectAll('a')
-	          .attr('rel', 'noopener')
-	          .attr('target', '_blank');
-	    }
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s, utf8));
+	        };
 
-	    // Common Pitfalls (musn't exist for every issue type)
-	    if (issueString(_qaItem, 'trap')) {
-	      var div$2 = detailsEnter
-	        .append('div')
-	          .attr('class', 'qa-details-subsection');
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s, utf8), b64pad);
+	        };
 
-	      div$2
-	        .append('h4')
-	          .text(function () { return _t('QA.osmose.trap_title'); });
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s, utf8), e);
+	        };
 
-	      div$2
-	        .append('p')
-	          .html(function (d) { return issueString(d, 'trap'); })
-	        .selectAll('a')
-	          .attr('rel', 'noopener')
-	          .attr('target', '_blank');
-	    }
+	        this.raw = function (s) {
+	          return rstr(s, utf8);
+	        };
 
-	    // 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; }
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	        // 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();
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	                  utilHighlightEntities([entityID], false, context);
+	        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 osmlayer = context.layers().layer('osm');
-	                  if (!osmlayer.enabled()) {
-	                    osmlayer.enabled(true);
-	                  }
 
-	                  context.map().centerZoom(d.loc, 20);
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	                  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
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	                if (!name) {
-	                  var preset = _mainPresetIndex.match(entity, context.graph());
-	                  name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-	                }
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	                if (name) {
-	                  this.innerText = name;
-	                }
-	              }
-	            });
 
-	        // 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
-	      });
-	  }
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
 
-	  osmoseDetails.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return osmoseDetails;
-	  };
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
+	          return this;
+	        }; // private methods
 
-	  return osmoseDetails;
-	}
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
 
-	function uiOsmoseHeader() {
-	  var _qaItem;
 
-	  function issueTitle(d) {
-	    var unknown = _t('inspector.unknown');
+	        function rstr(s, utf8) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binb2rstr(binb(rstr2binb(s), s.length * 8));
+	        }
+	        /**
+	         * Calculate the HMAC-sha256 of a key and some data (raw strings)
+	         */
 
-	    if (!d) { return unknown; }
 
-	    // Issue titles supplied by Osmose
-	    var s = services.osmose.getStrings(d.itemType);
-	    return ('title' in s) ? s.title : unknown;
-	  }
+	        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 osmoseHeader(selection) {
-	    var header = selection.selectAll('.qa-header')
-	      .data(
-	        (_qaItem ? [_qaItem] : []),
-	        function (d) { return ((d.id) + "-" + (d.status || 0)); }
-	      );
+	          if (bkey.length > 16) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	    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' : ''));
+	          for (; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
 	          }
-	        });
 
-	    headerEnter
-	      .append('div')
-	        .attr('class', 'qa-header-label')
-	        .text(issueTitle);
-	  }
+	          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
+	         */
 
-	  osmoseHeader.issue = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return osmoseHeader;
-	  };
 
-	  return osmoseHeader;
-	}
+	        function sha256_S(X, n) {
+	          return X >>> n | X << 32 - n;
+	        }
 
-	function uiViewOnOsmose() {
-	  var _qaItem;
+	        function sha256_R(X, n) {
+	          return X >>> n;
+	        }
 
-	  function viewOnOsmose(selection) {
-	    var url;
-	    if (services.osmose && (_qaItem instanceof QAItem)) {
-	      url = services.osmose.itemURL(_qaItem);
-	    }
+	        function sha256_Ch(x, y, z) {
+	          return x & y ^ ~x & z;
+	        }
 
-	    var link = selection.selectAll('.view-on-osmose')
-	      .data(url ? [url] : []);
+	        function sha256_Maj(x, y, z) {
+	          return x & y ^ x & z ^ y & z;
+	        }
 
-	    // exit
-	    link.exit()
-	      .remove();
+	        function sha256_Sigma0256(x) {
+	          return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
+	        }
 
-	    // 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'));
+	        function sha256_Sigma1256(x) {
+	          return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
+	        }
 
-	    linkEnter
-	      .append('span')
-	        .text(_t('inspector.view_on_osmose'));
-	  }
+	        function sha256_Gamma0256(x) {
+	          return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
+	        }
 
-	  viewOnOsmose.what = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return viewOnOsmose;
-	  };
+	        function sha256_Gamma1256(x) {
+	          return sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10);
+	        }
 
-	  return viewOnOsmose;
-	}
+	        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 uiOsmoseEditor(context) {
-	  var dispatch$1 = dispatch('change');
-	  var qaDetails = uiOsmoseDetails(context);
-	  var qaHeader = uiOsmoseHeader();
+	        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 */
 
-	  var _qaItem;
+	          m[l >> 5] |= 0x80 << 24 - l % 32;
+	          m[(l + 64 >> 9 << 4) + 15] = l;
 
-	  function osmoseEditor(selection) {
+	          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];
 
-	    var header = selection.selectAll('.header')
-	      .data([0]);
+	            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]);
+	              }
+
+	              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]);
+	          }
 
-	    var headerEnter = header.enter()
-	      .append('div')
-	        .attr('class', 'header fillL');
+	          return HASH;
+	        }
+	      },
 
-	    headerEnter
-	      .append('button')
-	        .attr('class', 'close')
-	        .on('click', function () { return context.enter(modeBrowse(context)); })
-	        .call(svgIcon('#iD-icon-close'));
+	      /**
+	       * @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,
 
-	    headerEnter
-	      .append('h3')
-	        .text(_t('QA.osmose.title'));
+	        /* hexadecimal output case format. false - lowercase; true - uppercase  */
+	        b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
 
-	    var body = selection.selectAll('.body')
-	      .data([0]);
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-	    body = body.enter()
-	        .append('div')
-	        .attr('class', 'body')
-	      .merge(body);
+	        /* enable/disable utf8 encoding */
+	        sha512_k;
+	        /* privileged (public) methods */
 
-	    var editor = body.selectAll('.qa-editor')
-	      .data([0]);
+	        this.hex = function (s) {
+	          return rstr2hex(rstr(s));
+	        };
 
-	    editor.enter()
-	      .append('div')
-	        .attr('class', 'modal-section qa-editor')
-	      .merge(editor)
-	        .call(qaHeader.issue(_qaItem))
-	        .call(qaDetails.issue(_qaItem))
-	        .call(osmoseSaveSection);
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	    var footer = selection.selectAll('.footer')
-	      .data([0]);
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	    footer.enter()
-	      .append('div')
-	      .attr('class', 'footer')
-	      .merge(footer)
-	      .call(uiViewOnOsmose().what(_qaItem));
-	  }
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	  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)); }
-	      );
+	        this.hex_hmac = function (k, d) {
+	          return rstr2hex(rstr_hmac(k, d));
+	        };
 
-	    // exit
-	    saveSection.exit()
-	      .remove();
+	        this.b64_hmac = function (k, d) {
+	          return rstr2b64(rstr_hmac(k, d), b64pad);
+	        };
 
-	    // enter
-	    var saveSectionEnter = saveSection.enter()
-	      .append('div')
-	        .attr('class', 'qa-save save-section cf');
+	        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
+	         */
 
-	    // update
-	    saveSection = saveSectionEnter
-	      .merge(saveSection)
-	        .call(qaSaveButtons);
-	  }
 
-	  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.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    // exit
-	    buttonSection.exit()
-	      .remove();
 
-	    // enter
-	    var buttonEnter = buttonSection.enter()
-	      .append('div')
-	        .attr('class', 'buttons');
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button close-button action');
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    buttonEnter
-	      .append('button')
-	        .attr('class', 'button ignore-button action');
 
-	    // update
-	    buttonSection = buttonSection
-	      .merge(buttonEnter);
+	        this.setPad = function (a) {
+	          b64pad = a || b64pad;
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	    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); });
-	        }
-	      });
 
-	    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); });
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
+
+	          return this;
+	        };
+	        /* private methods */
+
+	        /**
+	         * Calculate the SHA-512 of a raw string
+	         */
+
+
+	        function rstr(s) {
+	          s = utf8 ? utf8Encode(s) : s;
+	          return binb2rstr(binb(rstr2binb(s), s.length * 8));
 	        }
-	      });
-	  }
+	        /*
+	         * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
+	         */
 
-	  // NOTE: Don't change method name until UI v3 is merged
-	  osmoseEditor.error = function(val) {
-	    if (!arguments.length) { return _qaItem; }
-	    _qaItem = val;
-	    return osmoseEditor;
-	  };
 
-	  return utilRebind(osmoseEditor, dispatch$1, 'on');
-	}
+	        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);
 
-	// 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 (bkey.length > 32) {
+	            bkey = binb(bkey, key.length * 8);
+	          }
 
-	    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;
-	    }
+	          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)];
+	          }
 
-	    var behaviors = [
-	        behaviorBreathe(),
-	        behaviorHover(context),
-	        behaviorSelect(context),
-	        behaviorLasso(context),
-	        modeDragNode(context).behavior,
-	        modeDragNote(context).behavior
-	    ];
+	          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 hash;
+	        } //A constructor for 64-bit numbers
 
-	    function checkSelectedID() {
-	        if (!errorService) { return; }
-	        var error = errorService.getError(selectedErrorID);
-	        if (!error) {
-	            context.enter(modeBrowse(context));
-	        }
-	        return error;
-	    }
 
+	        function int64(h, l) {
+	          this.h = h;
+	          this.l = l; //this.toString = int64toString;
+	        } //Copies src into dst, assuming both are 64-bit numbers
 
-	    mode.zoomToSelected = function() {
-	        if (!errorService) { return; }
-	        var error = errorService.getError(selectedErrorID);
-	        if (error) {
-	            context.map().centerZoomEase(error.loc, 20);
-	        }
-	    };
 
+	        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
 
-	    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);
+	        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
 
-	        select(document)
-	            .call(keybinding);
 
-	        selectError();
+	        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
 
-	        var sidebar = context.ui().sidebar;
-	        sidebar.show(errorEditor.error(error));
 
-	        context.map()
-	            .on('drawn.select-error', selectError);
+	        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
 
 
-	        // class the error as selected, or return to browse mode if the error is gone
-	        function selectError(drawn) {
-	            if (!checkSelectedID()) { return; }
+	        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.
 
-	            var selection = context.surface()
-	                .selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
 
-	            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));
-	                }
+	        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
 
-	            } else {
-	                selection
-	                    .classed('selected', true);
 
-	                context.selectedErrorID(selectedErrorID);
-	            }
+	        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;
 	        }
+	      },
 
-	        function esc() {
-	            if (context.container().select('.combobox').size()) { return; }
-	            context.enter(modeBrowse(context));
-	        }
-	    };
+	      /**
+	       * @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 : '=',
 
-	    mode.exit = function() {
-	        behaviors.forEach(context.uninstall);
+	        /* base-64 pad character. Default '=' for strict RFC compliance   */
+	        utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-	        select(document)
-	            .call(keybinding.unbind);
+	        /* 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));
+	        };
 
-	        context.surface()
-	            .selectAll('.qaItem.selected')
-	            .classed('selected hover', false);
+	        this.b64 = function (s) {
+	          return rstr2b64(rstr(s), b64pad);
+	        };
 
-	        context.map()
-	            .on('drawn.select-error', null);
+	        this.any = function (s, e) {
+	          return rstr2any(rstr(s), e);
+	        };
 
-	        context.ui().sidebar
-	            .hide();
+	        this.raw = function (s) {
+	          return rstr(s);
+	        };
 
-	        context.selectedErrorID(null);
-	        context.features().forceVisible([]);
-	    };
+	        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);
+	        };
 
-	    return mode;
-	}
+	        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
+	         */
 
-	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;
 
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	        this.vm_test = function () {
+	          return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+	        };
+	        /**
+	         * @description Enable/disable uppercase hexadecimal returned string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
 
-	    function keydown() {
+	        this.setUpperCase = function (a) {
+	          if (typeof a === 'boolean') {
+	            hexcase = a;
+	          }
 
-	        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; }
-	        }
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {string} Pad
+	         * @return {Object} this
+	         * @public
+	         */
 
-	        if (event.keyCode === 93 ||  // context menu key
-	            event.keyCode === 32) {  // spacebar
-	            event.preventDefault();
-	        }
 
-	        if (event.repeat) { return; } // ignore repeated events for held keys
+	        this.setPad = function (a) {
+	          if (typeof a !== 'undefined') {
+	            b64pad = a;
+	          }
 
-	        // if any key is pressed the user is probably doing something other than long-pressing
-	        cancelLongPress();
+	          return this;
+	        };
+	        /**
+	         * @description Defines a base64 pad string
+	         * @param {boolean}
+	         * @return {Object} this
+	         * @public
+	         */
 
-	        if (event.shiftKey) {
-	            context.surface()
-	                .classed('behavior-multiselect', true);
-	        }
 
-	        if (event.keyCode === 32) {  // spacebar
-	            if (!_downPointers.spacebar && _lastMouseEvent) {
-	                cancelLongPress();
-	                _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
+	        this.setUTF8 = function (a) {
+	          if (typeof a === 'boolean') {
+	            utf8 = a;
+	          }
 
-	                _downPointers.spacebar = {
-	                    firstEvent: _lastMouseEvent,
-	                    lastEvent: _lastMouseEvent
-	                };
-	            }
-	        }
-	    }
+	          return this;
+	        };
+	        /* private methods */
 
+	        /**
+	         * Calculate the rmd160 of a raw string
+	         */
 
-	    function keyup() {
-	        cancelLongPress();
 
-	        if (!event.shiftKey) {
-	            context.surface()
-	                .classed('behavior-multiselect', false);
+	        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)
+	         */
 
-	        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;
 
-	                if (pointer.done) { return; }
+	        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);
 
-	                event.preventDefault();
-	                _lastInteractionType = 'spacebar';
-	                click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
-	            }
-	        }
-	    }
+	          if (bkey.length > 16) {
+	            bkey = binl(bkey, key.length * 8);
+	          }
 
+	          for (i = 0; i < 16; i += 1) {
+	            ipad[i] = bkey[i] ^ 0x36363636;
+	            opad[i] = bkey[i] ^ 0x5C5C5C5C;
+	          }
 
-	    function pointerdown() {
-	        var id = (event.pointerId || 'mouse').toString();
+	          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
+	         */
 
-	        cancelLongPress();
 
-	        if (event.buttons && event.buttons !== 1) { return; }
+	        function binl2rstr(input) {
+	          var i,
+	              output = '',
+	              l = input.length * 32;
 
-	        context.ui().closeEditMenu();
+	          for (i = 0; i < l; i += 8) {
+	            output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+	          }
 
-	        _longPressTimeout = window.setTimeout(didLongPress, 500, id, 'longdown-' + (event.pointerType || 'mouse'));
+	          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;
+	          }
 
-	        _downPointers[id] = {
-	            firstEvent: event,
-	            lastEvent: event
-	        };
-	    }
+	          return [h0, h1, h2, h3, h4];
+	        } // specific algorithm methods
 
 
-	    function didLongPress(id, interactionType) {
-	        var pointer = _downPointers[id];
-	        if (!pointer) { return; }
+	        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';
+	        }
 
-	        for (var i in _downPointers) {
-	            // don't allow this or any currently down pointer to trigger another click
-	            _downPointers[i].done = true;
+	        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';
 	        }
 
-	        // treat long presses like right-clicks
-	        _longPressTimeout = null;
-	        _lastInteractionType = interactionType;
-	        _showMenu = true;
+	        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';
+	        }
+	      }
+	    }; // exposes Hashes
 
-	        click(pointer.firstEvent, pointer.lastEvent, id);
-	    }
+	    (function (window, undefined$1) {
+	      var freeExports = false;
 
+	      {
+	        freeExports = exports;
 
-	    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 (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
+	          window = commonjsGlobal;
 	        }
-	    }
+	      }
 
+	      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
 
-	    function pointerup() {
-	        var id = (event.pointerId || 'mouse').toString();
-	        var pointer = _downPointers[id];
-	        if (!pointer) { return; }
+	});
 
-	        delete _downPointers[id];
+	var immutable = extend$2;
+	var hasOwnProperty$2 = Object.prototype.hasOwnProperty;
 
-	        if (_multiselectionPointerId === id) {
-	            _multiselectionPointerId = null;
-	        }
+	function extend$2() {
+	  var target = {};
 
-	        if (pointer.done) { return; }
+	  for (var i = 0; i < arguments.length; i++) {
+	    var source = arguments[i];
 
-	        click(pointer.firstEvent, event, id);
+	    for (var key in source) {
+	      if (hasOwnProperty$2.call(source, key)) {
+	        target[key] = source[key];
+	      }
 	    }
+	  }
+
+	  return target;
+	}
 
+	var sha1 = new hashes.SHA1();
+	var ohauth = {};
+
+	ohauth.qsString = function (obj) {
+	  return Object.keys(obj).sort().map(function (key) {
+	    return ohauth.percentEncode(key) + '=' + ohauth.percentEncode(obj[key]);
+	  }).join('&');
+	};
 
-	    function pointercancel() {
-	        var id = (event.pointerId || 'mouse').toString();
-	        if (!_downPointers[id]) { return; }
+	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;
+	  }, {});
+	};
 
-	        delete _downPointers[id];
+	ohauth.rawxhr = function (method, url, data, headers, callback) {
+	  var xhr = new XMLHttpRequest(),
+	      twoHundred = /^20\d$/;
 
-	        if (_multiselectionPointerId === id) {
-	            _multiselectionPointerId = null;
-	        }
+	  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);
+	  };
 
-	    function contextmenu() {
-	        var e = event;
-	        e.preventDefault();
+	  xhr.open(method, url, true);
 
-	        if (!+e.clientX && !+e.clientY) {
-	            if (_lastMouseEvent) {
-	                e.sourceEvent = _lastMouseEvent;
-	            } else {
-	                return;
-	            }
-	        } else {
-	            _lastMouseEvent = event;
-	            _lastInteractionType = 'rightclick';
-	        }
+	  for (var h in headers) {
+	    xhr.setRequestHeader(h, headers[h]);
+	  }
 
-	        _showMenu = true;
-	        click(event, event);
-	    }
+	  xhr.send(data);
+	  return xhr;
+	};
 
+	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);
+	};
 
-	    function click(firstEvent, lastEvent, pointerId) {
-	        cancelLongPress();
+	ohauth.nonce = function () {
+	  for (var o = ''; o.length < 6;) {
+	    o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
+	  }
 
-	        var mapNode = context.container().select('.main-map').node();
+	  return o;
+	};
 
-	        // 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);
+	ohauth.authHeader = function (obj) {
+	  return Object.keys(obj).sort().map(function (key) {
+	    return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
+	  }).join(', ');
+	};
 
-	        if (dist > _tolerancePx ||
-	            !mapContains(lastEvent)) {
+	ohauth.timestamp = function () {
+	  return ~~(+new Date() / 1000);
+	};
 
-	            resetProperties();
-	            return;
-	        }
+	ohauth.percentEncode = function (s) {
+	  return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
+	};
 
-	        var targetDatum = lastEvent.target.__data__;
+	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('&');
+	};
 
-	        var multiselectEntityId;
+	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.
+	 */
 
-	        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;
-	            }
-	        }
 
-	        // 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)
-	        );
+	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();
 
-	        processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
+	    if (typeof extra_params === 'string' && extra_params.length > 0) {
+	      extra_params = ohauth.stringQs(extra_params);
+	    }
 
-	        function mapContains(event) {
-	            var rect = mapNode.getBoundingClientRect();
-	            return event.clientX >= rect.left &&
-	                event.clientX <= rect.right &&
-	                event.clientY >= rect.top &&
-	                event.clientY <= rect.bottom;
-	        }
+	    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;
 
-	        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; }
+	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;
 
-	                var pointerInfo = _downPointers[pointerId];
+	      if (numUrls === 0) {
+	        throw new Error("resolveUrl requires at least one argument; got none.");
+	      }
 
-	                var p1 = pointGetter(pointerInfo.firstEvent);
-	                var p2 = pointGetter(pointerInfo.lastEvent);
-	                if (geoVecLength(p1, p2) > _tolerancePx) { continue; }
+	      var base = document.createElement("base");
+	      base.href = arguments[0];
 
-	                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;
-	        }
+	      if (numUrls === 1) {
+	        return base.href;
+	      }
+
+	      var head = document.getElementsByTagName("head")[0];
+	      head.insertBefore(base, head.firstChild);
+	      var a = document.createElement("a");
+	      var resolved;
+
+	      for (var index = 1; index < numUrls; index++) {
+	        a.href = arguments[index];
+	        resolved = a.href;
+	        base.href = resolved;
+	      }
+
+	      head.removeChild(base);
+	      return resolved;
 	    }
 
+	    return resolveUrl;
+	  });
+	});
 
-	    function processClick(datum, isMultiselect, point, alsoSelectId) {
-	        var mode = context.mode();
-	        var showMenu = _showMenu;
-	        var interactionType = _lastInteractionType;
+	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;
+	        });
+	      }
+
+	      return obj;
+	    };
+	  }
+	}
 
-	        var entity = datum && datum.properties && datum.properties.entity;
-	        if (entity) { datum = entity; }
+	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
 
-	        if (datum && datum.type === 'midpoint') {
-	            // treat targeting midpoints as if targeting the parent way
-	            datum = datum.parents[0];
-	        }
 
-	        var newMode;
+	    return function create(obj, assignProps1, assignProps2, etc) {
+	      var assignArgsList = slice$2(arguments, 1);
+	      F.prototype = obj;
+	      return assign.apply(this, [new F()].concat(assignArgsList));
+	    };
+	  }
+	}
 
-	        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);
-	                }
+	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, '');
+	    };
+	  }
+	}
 
-	            } 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);
-	                }
-	            }
+	function bind$1(obj, fn) {
+	  return function () {
+	    return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
+	  };
+	}
 
-	        } else if (datum && datum.__featurehash__ && !isMultiselect) {
-	            // targeting custom data
-	            context
-	                .selectedNoteID(null)
-	                .enter(modeSelectData(context, datum));
+	function slice$2(arr, index) {
+	  return Array.prototype.slice.call(arr, index || 0);
+	}
 
-	        } else if (datum instanceof osmNote && !isMultiselect) {
-	            // targeting a note
-	            context
-	                .selectedNoteID(datum.id)
-	                .enter(modeSelectNote(context, datum.id));
+	function each(obj, fn) {
+	  pluck(obj, function (val, key) {
+	    fn(val, key);
+	    return false;
+	  });
+	}
 
-	        } else if (datum instanceof QAItem & !isMultiselect) {
-	            // targeting an external QA issue
-	            context
-	                .selectedErrorID(datum.id)
-	                .enter(modeSelectError(context, datum.id, datum.service));
+	function map$1(obj, fn) {
+	  var res = isList(obj) ? [] : {};
+	  pluck(obj, function (v, k) {
+	    res[k] = fn(v, k);
+	    return false;
+	  });
+	  return res;
+	}
 
-	        } else {
-	            // targeting nothing
-	            context.selectedNoteID(null);
-	            context.selectedErrorID(null);
-	            if (!isMultiselect && mode.id !== 'browse') {
-	                context.enter(modeBrowse(context));
-	            }
+	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];
 	        }
+	      }
+	    }
+	  }
+	}
 
-	        context.ui().closeEditMenu();
+	function isList(val) {
+	  return val != null && typeof val != 'function' && typeof val.length == 'number';
+	}
+
+	function isFunction(val) {
+	  return val && {}.toString.call(val) === '[object Function]';
+	}
 
-	        // always request to show the edit menu in case the mode needs it
-	        if (showMenu) { context.ui().showEditMenu(point, interactionType); }
+	function isObject$2(val) {
+	  return val && {}.toString.call(val) === '[object Object]';
+	}
 
-	        resetProperties();
+	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);
+	  }
+	};
 
-	    function cancelLongPress() {
-	        if (_longPressTimeout) { window.clearTimeout(_longPressTimeout); }
-	        _longPressTimeout = null;
-	    }
+	function _warn() {
+	  var _console = typeof console == 'undefined' ? null : console;
 
+	  if (!_console) {
+	    return;
+	  }
 
-	    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();
-	                }
-	            });
+	  var fn = _console.warn ? _console.warn : _console.log;
+	  fn.apply(_console, arguments);
+	}
 
-	        selection
-	            .on(_pointerPrefix + 'down.select', pointerdown)
-	            .on('contextmenu.select', contextmenu);
+	function _createStore(storages, plugins, namespace) {
+	  if (!namespace) {
+	    namespace = '';
+	  }
 
-	        if (event && event.shiftKey) {
-	            context.surface()
-	                .classed('behavior-multiselect', true);
-	        }
-	    }
+	  if (storages && !isList$1(storages)) {
+	    storages = [storages];
+	  }
 
+	  if (plugins && !isList$1(plugins)) {
+	    plugins = [plugins];
+	  }
 
-	    behavior.off = function(selection) {
-	        cancelLongPress();
+	  var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
+	  var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
+	  var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
 
-	        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);
+	  if (!legalNamespaces.test(namespace)) {
+	    throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
+	  }
 
-	        selection
-	            .on(_pointerPrefix + 'down.select', null)
-	            .on('contextmenu.select', null);
+	  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];
 
-	        context.surface()
-	            .classed('behavior-multiselect', false);
-	    };
+	      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.
 
+	        function super_fn() {
+	          if (!oldFn) {
+	            return;
+	          }
 
-	    return behavior;
-	}
+	          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.
 
-	function behaviorDrawWay(context, wayID, mode, startGraph) {
 
-	    var dispatch$1 = dispatch('rejectedSelfIntersection');
+	        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
 
-	    var behavior = behaviorDraw(context);
 
-	    // Must be set by `drawWay.nodeIndex` before each install of this behavior.
-	    var _nodeIndex;
+	      var val = '';
 
-	    var _origWay;
-	    var _wayGeometry;
-	    var _headNodeID;
-	    var _annotation;
+	      try {
+	        val = JSON.parse(strVal);
+	      } catch (e) {
+	        val = strVal;
+	      }
 
-	    var _pointerHasMoved = false;
+	      return val !== undefined ? val : defaultVal;
+	    },
+	    _addStorage: function _addStorage(storage) {
+	      if (this.enabled) {
+	        return;
+	      }
 
-	    // The osmNode to be placed.
-	    // This is temporary and just follows the mouse cursor until an "add" event occurs.
-	    var _drawNode;
+	      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.
 
-	    var _didResolveTempEdit = 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.
 
-	    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();
+	      var seenPlugin = pluck$1(this.plugins, function (seenPlugin) {
+	        return plugin === seenPlugin;
+	      });
 
-	        setActiveElements();
-	    }
+	      if (seenPlugin) {
+	        return;
+	      }
 
-	    function removeDrawNode() {
+	      this.plugins.push(plugin); // Check that the plugin is properly formed
 
-	        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();
-	    }
+	      if (!isFunction$1(plugin)) {
+	        throw new Error('Plugins must be function values that return objects');
+	      }
 
+	      var pluginProperties = plugin.call(this);
 
-	    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);
-	        }
-	    }
+	      if (!isObject$3(pluginProperties)) {
+	        throw new Error('Plugins must return an object of function properties');
+	      } // Add the plugin function properties to this store instance.
 
 
-	    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);
+	      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.');
 	        }
-	    }
 
+	        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])');
 
-	    function allowsVertex(d) {
-	        return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+	      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 Global$1 = util.Global;
+	var localStorage_1 = {
+	  name: 'localStorage',
+	  read: read,
+	  write: write,
+	  each: each$2,
+	  remove: remove$2,
+	  clearAll: clearAll
+	};
 
-	    // related code
-	    // - `mode/drag_node.js`     `doMove()`
-	    // - `behavior/draw.js`      `click()`
-	    // - `behavior/draw_way.js`  `move()`
-	    function move(datum) {
-
-	        var loc = context.map().mouseCoordinates();
+	function localStorage$1() {
+	  return Global$1.localStorage;
+	}
 
-	        if (!_drawNode) { createDrawNode(loc); }
+	function read(key) {
+	  return localStorage$1().getItem(key);
+	}
 
-	        context.surface().classed('nope-disabled', event.altKey);
+	function write(key, data) {
+	  return localStorage$1().setItem(key, data);
+	}
 
-	        var targetLoc = datum && datum.properties && datum.properties.entity &&
-	            allowsVertex(datum.properties.entity) && datum.properties.entity.loc;
-	        var targetNodes = datum && datum.properties && datum.properties.nodes;
+	function each$2(fn) {
+	  for (var i = localStorage$1().length - 1; i >= 0; i--) {
+	    var key = localStorage$1().key(i);
+	    fn(read(key), key);
+	  }
+	}
 
-	        if (targetLoc) {   // snap to node/vertex - a point target with `.loc`
-	            loc = targetLoc;
+	function remove$2(key) {
+	  return localStorage$1().removeItem(key);
+	}
 
-	        } 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;
-	            }
-	        }
+	function clearAll() {
+	  return localStorage$1().clear();
+	}
 
-	        context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
-	        _drawNode = context.entity(_drawNode.id);
-	        checkGeometry(true /* includeDrawNode */);
-	    }
+	// 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;
 
-	    // 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);
+	function read$1(key) {
+	  return globalStorage[key];
+	}
 
-	        if (nopeDisabled) {
-	            context.surface()
-	                .classed('nope', false)
-	                .classed('nope-suppressed', isInvalid);
-	        } else {
-	            context.surface()
-	                .classed('nope', isInvalid)
-	                .classed('nope-suppressed', false);
-	        }
-	    }
+	function write$1(key, data) {
+	  globalStorage[key] = data;
+	}
 
+	function each$3(fn) {
+	  for (var i = globalStorage.length - 1; i >= 0; i--) {
+	    var key = globalStorage.key(i);
+	    fn(globalStorage[key], key);
+	  }
+	}
 
-	    function isInvalidGeometry(includeDrawNode) {
+	function remove$3(key) {
+	  return globalStorage.removeItem(key);
+	}
 
-	        var testNode = _drawNode;
+	function clearAll$1() {
+	  each$3(function (key, _) {
+	    delete globalStorage[key];
+	  });
+	}
 
-	        // 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
+	// versions 6 and 7, where no localStorage, sessionStorage, etc
+	// is available.
 
-	        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
+	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;
 
-	            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;
-	            }
-	        }
+	var _withStorageEl = _makeIEStorageElFunction();
 
-	        return testNode && geoHasSelfIntersections(nodes, testNode.id);
-	    }
+	var disable = (Global$3.navigator ? Global$3.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
 
+	function write$2(unfixedKey, data) {
+	  if (disable) {
+	    return;
+	  }
 
-	    function undone() {
+	  var fixedKey = fixKey(unfixedKey);
 
-	        // undoing removed the temp edit
-	        _didResolveTempEdit = true;
+	  _withStorageEl(function (storageEl) {
+	    storageEl.setAttribute(fixedKey, data);
+	    storageEl.save(storageName);
+	  });
+	}
 
-	        context.pauseChangeDispatch();
+	function read$2(unfixedKey) {
+	  if (disable) {
+	    return;
+	  }
 
-	        var nextMode;
+	  var fixedKey = fixKey(unfixedKey);
+	  var res = null;
 
-	        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();
+	  _withStorageEl(function (storageEl) {
+	    res = storageEl.getAttribute(fixedKey);
+	  });
 
-	            if (context.graph() === startGraph) { // we've undone back to the beginning
-	                nextMode = modeSelect(context, [wayID]);
-	            } else {
-	                // continue drawing
-	                nextMode = mode;
-	            }
-	        }
+	  return res;
+	}
 
-	        // clear the redo stack by adding and removing an edit
-	        context.perform(actionNoop());
-	        context.pop(1);
+	function each$4(callback) {
+	  _withStorageEl(function (storageEl) {
+	    var attributes = storageEl.XMLDocument.documentElement.attributes;
 
-	        context.resumeChangeDispatch();
-	        context.enter(nextMode);
+	    for (var i = attributes.length - 1; i >= 0; i--) {
+	      var attr = attributes[i];
+	      callback(storageEl.getAttribute(attr.name), attr.name);
 	    }
+	  });
+	}
 
+	function remove$4(unfixedKey) {
+	  var fixedKey = fixKey(unfixedKey);
 
-	    function setActiveElements() {
-	        if (!_drawNode) { return; }
-
-	        context.surface().selectAll('.' + _drawNode.id)
-	            .classed('active', true);
-	    }
+	  _withStorageEl(function (storageEl) {
+	    storageEl.removeAttribute(fixedKey);
+	    storageEl.save(storageName);
+	  });
+	}
 
+	function clearAll$2() {
+	  _withStorageEl(function (storageEl) {
+	    var attributes = storageEl.XMLDocument.documentElement.attributes;
+	    storageEl.load(storageName);
 
-	    function resetToStartGraph() {
-	        while (context.graph() !== startGraph) {
-	            context.pop();
-	        }
+	    for (var i = attributes.length - 1; i >= 0; i--) {
+	      storageEl.removeAttribute(attributes[i].name);
 	    }
 
+	    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
 
-	    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);
-	    };
 
+	var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
 
-	    drawWay.off = function(surface) {
+	function fixKey(key) {
+	  return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
+	}
 
-	        if (!_didResolveTempEdit) {
-	            // Drawing was interrupted unexpectedly.
-	            // This can happen if the user changes modes,
-	            // clicks geolocate button, a hashchange event occurs, etc.
+	function _makeIEStorageElFunction() {
+	  if (!doc || !doc.documentElement || !doc.documentElement.addBehavior) {
+	    return null;
+	  }
 
-	            context.pauseChangeDispatch();
-	            resetToStartGraph();
-	            context.resumeChangeDispatch();
-	        }
+	  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.
 
-	        _drawNode = undefined;
-	        _nodeIndex = undefined;
+	  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;
+	  };
+	}
 
-	        context.map()
-	            .on('drawn.draw', null);
+	// doesn't work but cookies do. This implementation is adopted from
+	// https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
 
-	        surface.call(behavior.off)
-	            .selectAll('.active')
-	            .classed('active', false);
+	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;
 
-	        surface
-	            .classed('nope', false)
-	            .classed('nope-suppressed', false)
-	            .classed('nope-disabled', false);
+	function read$3(key) {
+	  if (!key || !_has(key)) {
+	    return null;
+	  }
 
-	        select(window)
-	            .on('keydown.drawWay', null)
-	            .on('keyup.drawWay', null);
+	  var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
+	  return unescape(doc$1.cookie.replace(new RegExp(regexpStr), "$1"));
+	}
 
-	        context.history()
-	            .on('undone.draw', null);
-	    };
+	function each$5(callback) {
+	  var cookies = doc$1.cookie.split(/; ?/g);
 
+	  for (var i = cookies.length - 1; i >= 0; i--) {
+	    if (!trim$4(cookies[i])) {
+	      continue;
+	    }
 
-	    function attemptAdd(d, loc, doAdd) {
+	    var kvp = cookies[i].split('=');
+	    var key = unescape(kvp[0]);
+	    var val = unescape(kvp[1]);
+	    callback(val, key);
+	  }
+	}
 
-	        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);
-	        }
+	function write$3(key, data) {
+	  if (!key) {
+	    return;
+	  }
 
-	        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
-	        }
+	  doc$1.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
+	}
 
-	        context.pauseChangeDispatch();
-	        doAdd();
-	        // we just replaced the temporary edit with the real one
-	        _didResolveTempEdit = true;
-	        context.resumeChangeDispatch();
+	function remove$5(key) {
+	  if (!key || !_has(key)) {
+	    return;
+	  }
 
-	        context.enter(mode);
-	    }
+	  doc$1.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
+	}
 
+	function clearAll$3() {
+	  each$5(function (_, key) {
+	    remove$5(key);
+	  });
+	}
 
-	    // 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 _has(key) {
+	  return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc$1.cookie);
+	}
 
+	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
+	};
 
-	    // 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
-	            );
-	        });
-	    };
+	function sessionStorage() {
+	  return Global$5.sessionStorage;
+	}
 
+	function read$4(key) {
+	  return sessionStorage().getItem(key);
+	}
 
-	    // Connect the way to an existing node
-	    drawWay.addNode = function(node, d) {
+	function write$4(key, data) {
+	  return sessionStorage().setItem(key, data);
+	}
 
-	        // 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 each$6(fn) {
+	  for (var i = sessionStorage().length - 1; i >= 0; i--) {
+	    var key = sessionStorage().key(i);
+	    fn(read$4(key), key);
+	  }
+	}
 
-	        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 remove$6(key) {
+	  return sessionStorage().removeItem(key);
+	}
 
-	                    graph = graph
-	                        .replace(graph.entity(wayID).removeNode(_drawNode.id))
-	                        .remove(_drawNode);
-	                    return graph
-	                        .replace(graph.entity(wayID).addNode(node.id, _nodeIndex));
-	                },
-	                _annotation
-	            );
-	        });
-	    };
+	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 = {};
 
-	    // 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 read$5(key) {
+	  return memoryStorage[key];
+	}
 
-	        context.pauseChangeDispatch();
-	        // remove the temporary edit
-	        context.pop(1);
-	        _didResolveTempEdit = true;
-	        context.resumeChangeDispatch();
+	function write$5(key, data) {
+	  memoryStorage[key] = data;
+	}
 
-	        var way = context.hasEntity(wayID);
-	        if (!way || way.isDegenerate()) {
-	            drawWay.cancel();
-	            return;
-	        }
+	function each$7(callback) {
+	  for (var key in memoryStorage) {
+	    if (memoryStorage.hasOwnProperty(key)) {
+	      callback(memoryStorage[key], key);
+	    }
+	  }
+	}
 
-	        window.setTimeout(function() {
-	            context.map().dblclickZoomEnable(true);
-	        }, 1000);
+	function remove$7(key) {
+	  delete memoryStorage[key];
+	}
 
-	        var isNewFeature = !mode.isContinuing;
-	        context.enter(modeSelect(context, [wayID]).newFeature(isNewFeature));
-	    };
+	function clearAll$5(key) {
+	  memoryStorage = {};
+	}
 
+	var all = [// Listed in order of usage preference
+	localStorage_1, oldFFGlobalStorage, oldIEUserDataStorage, cookieStorage, sessionStorage_1, memoryStorage_1];
 
-	    // Cancel the draw operation, delete everything, and return to browse mode.
-	    drawWay.cancel = function() {
-	        context.pauseChangeDispatch();
-	        resetToStartGraph();
-	        context.resumeChangeDispatch();
+	/* 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.
 
-	        window.setTimeout(function() {
-	            context.map().dblclickZoomEnable(true);
-	        }, 1000);
+	/*jslint
+	    eval, for, this
+	*/
 
-	        context.surface()
-	            .classed('nope', false)
-	            .classed('nope-disabled', false)
-	            .classed('nope-suppressed', false);
+	/*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 = {};
+	}
 
-	        context.enter(modeBrowse(context));
-	    };
+	(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;
 
-	    drawWay.nodeIndex = function(val) {
-	        if (!arguments.length) { return _nodeIndex; }
-	        _nodeIndex = val;
-	        return drawWay;
-	    };
+	  function f(n) {
+	    // Format integers to have at least two digits.
+	    return n < 10 ? "0" + n : n;
+	  }
 
+	  function this_value() {
+	    return this.valueOf();
+	  }
 
-	    drawWay.activeID = function() {
-	        if (!arguments.length) { return _drawNode && _drawNode.id; }
-	        // no assign
-	        return drawWay;
+	  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;
+	  }
 
-	    return utilRebind(drawWay, dispatch$1, 'on');
-	}
+	  var gap;
+	  var indent;
+	  var meta;
+	  var rep;
 
-	function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
-	    var mode = {
-	        button: button,
-	        id: 'draw-line'
-	    };
+	  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 behavior = behaviorDrawWay(context, wayID, mode, startGraph)
-	        .on('rejectedSelfIntersection.modeDrawLine', function() {
-	            context.ui().flash
-	                .text(_t('self_intersection.error.lines'))();
-	        });
+	  function str(key, holder) {
+	    // Produce a string from holder[key].
+	    var i; // The loop counter.
 
-	    mode.wayID = wayID;
+	    var k; // The member key.
 
-	    mode.isContinuing = continuing;
+	    var v; // The member value.
 
-	    mode.enter = function() {
-	        behavior
-	            .nodeIndex(affix === 'prefix' ? 0 : undefined);
+	    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.
 
-	        context.install(behavior);
-	    };
+	    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.
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
 
-	    mode.selectedIDs = function() {
-	        return [wayID];
-	    };
+	    if (typeof rep === "function") {
+	      value = rep.call(holder, key, value);
+	    } // What happens next depends on the value's type.
 
-	    mode.activeID = function() {
-	        return (behavior && behavior.activeID()) || [];
-	    };
 
-	    return mode;
-	}
+	    switch (_typeof(value)) {
+	      case "string":
+	        return quote(value);
 
-	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];
+	      case "number":
+	        // JSON numbers must be finite. Encode non-finite numbers as null.
+	        return isFinite(value) ? String(value) : "null";
 
+	      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.
 
-	    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);
-	        });
-	    }
+	      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.
 
 
-	    var operation = function() {
-	        var candidate = candidateWays()[0];
-	        context.enter(
-	            modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(vertex.id), true)
-	        );
-	    };
+	        gap += indent;
+	        partial = []; // Is the value an array?
 
+	        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;
 
-	    operation.available = function() {
-	        return geometries.vertex.length === 1 &&
-	            geometries.line.length <= 1 &&
-	            !context.features().hasHiddenConnections(vertex, context.graph());
-	    };
+	          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.
 
 
-	    operation.disabled = function() {
-	        var candidates = candidateWays();
-	        if (candidates.length === 0) {
-	            return 'not_eligible';
-	        } else if (candidates.length > 1) {
-	            return 'multiple';
-	        }
+	          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 false;
-	    };
 
+	        if (rep && _typeof(rep) === "object") {
+	          length = rep.length;
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.continue.' + disable) :
-	            _t('operations.continue.description');
-	    };
+	          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 {
+	          // 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);
 
-	    operation.annotation = function() {
-	        return _t('operations.continue.annotation.line');
-	    };
+	              if (v) {
+	                partial.push(quote(k) + (gap ? ": " : ":") + v);
+	              }
+	            }
+	          }
+	        } // Join all of the member texts together, separated with commas,
+	        // and wrap them in braces.
 
 
-	    operation.id = 'continue';
-	    operation.keys = [_t('operations.continue.key')];
-	    operation.title = _t('operations.continue.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	        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.
 
-	    return operation;
-	}
 
-	function operationCopy(context, selectedIDs) {
+	  if (typeof JSON.stringify !== "function") {
+	    meta = {
+	      // table of character substitutions
+	      "\b": "\\b",
+	      "\t": "\\t",
+	      "\n": "\\n",
+	      "\f": "\\f",
+	      "\r": "\\r",
+	      "\"": "\\\"",
+	      "\\": "\\\\"
+	    };
 
-	    var _multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+	    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.
 
-	    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';
-	        });
-	    }
+	      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.
 
-	    var operation = function() {
+	      } else if (typeof space === "string") {
+	        indent = space;
+	      } // If there is a replacer, it must be a function or an array.
+	      // Otherwise, throw an error.
 
-	        if (!getSelectionText()) {
-	            event.preventDefault();
-	        }
 
-	        var graph = context.graph();
-	        var selected = groupEntities(getFilteredIdsToCopy(), graph);
-	        var canCopy = [];
-	        var skip = {};
-	        var entity;
-	        var i;
+	      rep = replacer;
 
-	        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);
-	            }
-	        }
+	      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.
 
-	        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);
-	        }
 
+	      return str("", {
+	        "": value
+	      });
 	    };
+	  } // If the JSON object does not yet have a parse method, give it one.
 
 
-	    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;
+	  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;
 
-	        descendants = descendants || {};
+	      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 (entity.type === 'relation') {
-	            children = entity.members.map(function(m) { return m.id; });
-	        } else if (entity.type === 'way') {
-	            children = entity.nodes;
-	        } else {
-	            children = [];
-	        }
+	        if (value && _typeof(value) === "object") {
+	          for (k in value) {
+	            if (Object.prototype.hasOwnProperty.call(value, k)) {
+	              v = walk(value, k);
 
-	        for (var i = 0; i < children.length; i++) {
-	            if (!descendants[children[i]]) {
-	                descendants[children[i]] = true;
-	                descendants = getDescendants(children[i], graph, descendants);
+	              if (v !== undefined) {
+	                value[k] = v;
+	              } else {
+	                delete value[k];
+	              }
 	            }
+	          }
 	        }
 
-	        return descendants;
-	    }
+	        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.
 
 
-	    function getSelectionText() {
-	        return window.getSelection().toString();
-	    }
+	      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);
+	        });
+	      } // 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.
 
-	    operation.available = function() {
-	        return getFilteredIdsToCopy().length > 0;
-	    };
 
+	      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.
 
-	    operation.disabled = function() {
-	        var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
-	        if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-	            return 'too_large';
-	        }
-	        return false;
-	    };
+	        return typeof reviver === "function" ? walk({
+	          "": j
+	        }, "") : j;
+	      } // If the text is not JSON parseable, then a SyntaxError is thrown.
 
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.copy.' + disable + '.' + _multi) :
-	            _t('operations.copy.description' + '.' + _multi);
+	      throw new SyntaxError("JSON.parse");
 	    };
+	  }
+	})();
 
+	var json2 = json2Plugin;
 
-	    operation.annotation = function() {
-	        return selectedIDs.length === 1 ?
-	            _t('operations.copy.annotation.single') :
-	            _t('operations.copy.annotation.multiple', { n: selectedIDs.length.toString() });
-	    };
+	function json2Plugin() {
+	  return {};
+	}
 
+	var plugins = [json2];
+	var store_legacy = storeEngine.createStore(all, plugins);
 
-	    var _point;
-	    operation.point = function(val) {
-	        _point = val;
-	        return operation;
-	    };
+	//
+	// 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.
 
 
-	    operation.id = 'copy';
-	    operation.keys = [uiCmd('⌘C')];
-	    operation.title = _t('operations.copy.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	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
 
-	    return operation;
-	}
+	  oauth.authenticated = function () {
+	    return !!(token('oauth_token') && token('oauth_token_secret'));
+	  };
 
-	function operationDisconnect(context, selectedIDs) {
-	    var _vertexIDs = [];
-	    var _wayIDs = [];
-	    var _otherIDs = [];
-	    var _actions = [];
+	  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.
 
-	    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);
-	        }
-	    });
 
-	    var _extent, _nodes, _coords, _descriptionID = '', _annotationID = 'features';
+	    ohauth_1.xhr('POST', url, params, null, {}, reqTokenDone);
+	    o.loading();
 
-	    if (_vertexIDs.length > 0) {
-	        // At the selected vertices, disconnect the selected ways, if any, else
-	        // disconnect all connected ways
+	    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)
+	      });
 
-	        _extent = utilTotalExtent(_vertexIDs, context.graph());
+	      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.
 
-	        _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;
-	                });
-	                action.limitWays(waysIDsForVertex);
-	            }
-	            _actions.push(action);
-	        });
+	    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.
 
-	        _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';
-	        }
 
-	    } else if (_wayIDs.length > 0) {
-	        // Disconnect the selected ways from each other, if they're connected,
-	        // else disconnect them from all connected ways
+	    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`
 
-	        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; }
-	                }
+	      ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
+	      o.loading();
+	    }
 
-	                if (count > 1) {
-	                    sharedActions.push(action);
-	                } else {
-	                    unsharedActions.push(action);
-	                }
-	            }
-	        });
+	    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);
+	    }
+	  };
 
-	        _descriptionID += 'no_points.';
-	        _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
+	  oauth.bringPopupWindowToFront = function () {
+	    var brougtPopupToFront = false;
 
-	        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';
-	            }
-	        }
+	    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)
 	    }
 
+	    return brougtPopupToFront;
+	  };
 
-	    var operation = function() {
-	        context.perform(function(graph) {
-	            return _actions.reduce(function(graph, action) { return action(graph); }, graph);
-	        }, operation.annotation());
+	  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`
 
-	        context.validator().validate();
-	    };
+	      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);
+	    }
 
-	    operation.available = function() {
-	        if (_actions.length === 0) { return false; }
-	        if (_otherIDs.length !== 0) { return false; }
+	    get_access_token(oauth_token);
+	  }; // # xhr
+	  //
+	  // A single XMLHttpRequest wrapper that does authenticated calls if the
+	  // user has logged in.
 
-	        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;
-	    };
+	  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
 
-	    operation.disabled = function() {
-	        var reason;
-	        for (var actionIndex in _actions) {
-	            reason = _actions[actionIndex].disabled(context.graph());
-	            if (reason) { return reason; }
-	        }
+	      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 (_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';
-	        }
+	      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);
+	    }
 
-	        return false;
+	    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
 
 
-	        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;
-	        }
-	    };
+	  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;
+	    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
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        if (disable) {
-	            return _t('operations.disconnect.' + disable);
-	        }
-	        return _t('operations.disconnect.description.' + _descriptionID);
-	    };
+	    o.loading = o.loading || function () {};
 
+	    o.done = o.done || function () {};
 
-	    operation.annotation = function() {
-	        return _t('operations.disconnect.annotation.' + _annotationID);
-	    };
+	    return oauth.preauth(o);
+	  }; // 'stamp' an authentication object from `getAuth()`
+	  // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
+	  // and timestamp
 
 
-	    operation.id = 'disconnect';
-	    operation.keys = [_t('operations.disconnect.key')];
-	    operation.title = _t('operations.disconnect.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  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
 
-	    return operation;
-	}
 
-	function operationDowngrade(context, selectedIDs) {
-	    var affectedFeatureCount = 0;
-	    var downgradeType;
+	  var token;
 
-	    setDowngradeTypeForEntityIDs();
+	  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 = {};
 
-	    var multi = affectedFeatureCount === 1 ? 'single' : 'multiple';
+	    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
 
-	    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;
-	                }
-	            }
-	        }
-	    }
 
-	    function downgradeTypeForEntityID(entityID) {
-	        var graph = context.graph();
-	        var entity = graph.entity(entityID);
-	        var preset = _mainPresetIndex.match(entity, graph);
+	  function getAuth(o) {
+	    return {
+	      oauth_consumer_key: o.oauth_consumer_key,
+	      oauth_signature_method: 'HMAC-SHA1'
+	    };
+	  } // potentially pre-authorize
 
-	        if (!preset || preset.isFallback()) { return null; }
 
-	        if (entity.type === 'node' &&
-	            preset.id !== 'address' &&
-	            Object.keys(entity.tags).some(function(key) {
-	                return key.match(/^addr:.{1,}/);
-	            })) {
+	  oauth.options(o);
+	  return oauth;
+	};
 
-	            return 'address';
-	        }
-	        if (entity.geometry(graph) === 'area' &&
-	            entity.tags.building &&
-	            !preset.tags.building) {
+	var JXON = new function () {
+	  var sValueProp = 'keyValue',
+	      sAttributesProp = 'keyAttributes',
+	      sAttrPref = '@',
 
-	            return 'building';
-	        }
+	  /* you can customize these values */
+	  aCache = [],
+	      rIsNull = /^\s*$/,
+	      rIsBool = /^(?:true|false)$/i;
 
-	        return null;
+	  function parseText(sValue) {
+	    if (rIsNull.test(sValue)) {
+	      return null;
 	    }
 
-	    var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
-	    var addressKeysToKeep = ['source'];
+	    if (rIsBool.test(sValue)) {
+	      return sValue.toLowerCase() === 'true';
+	    }
 
-	    var operation = function () {
-	        context.perform(function(graph) {
+	    if (isFinite(sValue)) {
+	      return parseFloat(sValue);
+	    }
 
-	            for (var i in selectedIDs) {
-	                var entityID = selectedIDs[i];
-	                var type = downgradeTypeForEntityID(entityID);
-	                if (!type) { continue; }
+	    if (isFinite(Date.parse(sValue))) {
+	      return new Date(sValue);
+	    }
 
-	                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; }
+	    return sValue;
+	  }
 
-	                    delete tags[key];
-	                }
-	                graph = actionChangeTags(entityID, tags)(graph);
-	            }
-	            return graph;
-	        }, operation.annotation());
+	  function EmptyTree() {}
 
-	        context.validator().validate();
+	  EmptyTree.prototype.toString = function () {
+	    return 'null';
+	  };
 
-	        // refresh the select mode to enable the delete operation
-	        context.enter(modeSelect(context, selectedIDs));
-	    };
+	  EmptyTree.prototype.valueOf = function () {
+	    return null;
+	  };
 
+	  function objectify(vValue) {
+	    return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
+	  }
 
-	    operation.available = function () {
-	        return downgradeType;
-	    };
+	  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;
 
+	    if (bChildren) {
+	      for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
+	        oNode = oParentNode.childNodes.item(nItem);
 
-	    operation.disabled = function () {
-	        if (selectedIDs.some(hasWikidataTag)) {
-	            return 'has_wikidata_tag';
+	        if (oNode.nodeType === 4) {
+	          sCollectedTxt += oNode.nodeValue;
 	        }
-	        return false;
+	        /* 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) */
 
-	        function hasWikidataTag(id) {
-	            var entity = context.entity(id);
-	            return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+	      }
+	    }
+
+	    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++;
+	      }
+	    }
 
-	    operation.tooltip = function () {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.downgrade.' + disable + '.' + multi) :
-	            _t('operations.downgrade.description.' + downgradeType);
-	    };
+	    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());
+	      }
 
-	    operation.annotation = function () {
-	        var suffix;
-	        if (downgradeType === 'building_address') {
-	            suffix = 'multiple';
-	        } else {
-	            suffix = downgradeType + '.' + multi;
+	      if (bNesteAttr) {
+	        if (bFreeze) {
+	          Object.freeze(oAttrParent);
 	        }
-	        return _t('operations.downgrade.annotation.' + suffix, { n: affectedFeatureCount});
-	    };
 
+	        vResult[sAttributesProp] = oAttrParent;
+	        nLength -= nAttrLen - 1;
+	      }
+	    }
 
-	    operation.id = 'downgrade';
-	    operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-	    operation.title = _t('operations.downgrade.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	    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);
+	    }
 
-	    return operation;
-	}
+	    aCache.length = nLevelStart;
+	    return vResult;
+	  }
 
-	function operationExtract(context, selectedIDs) {
+	  function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
+	    var vValue, oChild;
 
-	    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 (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()));
+	    }
 
-	    var _extent;
-	    var _actions = selectedIDs.map(function(entityID) {
-	        var graph = context.graph();
-	        var entity = graph.hasEntity(entityID);
-	        if (!entity || !entity.hasInterestingTags()) { return; }
+	    for (var sName in oParentObj) {
+	      vValue = oParentObj[sName];
 
-	        if (entity.type === 'node' && graph.parentWays(entity).length === 0) { return; }
+	      if (isFinite(sName) || vValue instanceof Function) {
+	        continue;
+	      }
+	      /* verbosity level is 0 */
 
-	        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; }
+
+	      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);
 
-	        _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+	        if (vValue instanceof Object) {
+	          loadObjTree(oXMLDoc, oChild, vValue);
+	        } else if (vValue !== null && vValue !== true) {
+	          oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+	        }
 
-	        return actionExtract(entityID);
-	    }).filter(Boolean);
+	        oParentEl.appendChild(oChild);
+	      }
+	    }
+	  }
 
+	  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;
 
-	    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 createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);
+	  };
 
-	        var extractedNodeIDs = _actions.map(function(action) {
-	            return action.getExtractedNodeID();
-	        });
-	        context.enter(modeSelect(context, extractedNodeIDs));
-	    };
+	  this.unbuild = function (oObjTree) {
+	    var oNewDoc = document.implementation.createDocument('', '', null);
+	    loadObjTree(oNewDoc, oNewDoc, oObjTree);
+	    return oNewDoc;
+	  };
 
+	  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));
 
-	    operation.available = function () {
-	        return _actions.length && selectedIDs.length === _actions.length;
-	    };
+	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 _cachedApiStatus;
 
-	    operation.disabled = function () {
+	var _changeset = {};
 
-	        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';
-	        }
+	var _deferred = new Set();
 
-	        return false;
-	    };
+	var _connectionID = 1;
+	var _tileZoom$3 = 16;
+	var _noteZoom = 12;
 
+	var _rateLimitError;
 
-	    operation.tooltip = function () {
-	        var disableReason = operation.disabled();
-	        if (disableReason) {
-	            return _t('operations.extract.' + disableReason + '.' + _amount);
-	        } else {
-	            return _t('operations.extract.description.' + _geometryID + '.' + _amount);
-	        }
-	    };
+	var _userChangesets;
 
+	var _userDetails;
 
-	    operation.annotation = function () {
-	        return _t('operations.extract.annotation.' + _amount, { n: selectedIDs.length });
-	    };
+	var _off; // set a default but also load this from the API status
 
 
-	    operation.id = 'extract';
-	    operation.keys = [_t('operations.extract.key')];
-	    operation.title = _t('operations.extract.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	var _maxWayNodes = 2000;
 
+	function authLoading() {
+	  dispatch$6.call('authLoading');
+	}
 
-	    return operation;
+	function authDone() {
+	  dispatch$6.call('authDone');
 	}
 
-	function operationMerge(context, selectedIDs) {
+	function abortRequest$5(controllerOrXHR) {
+	  if (controllerOrXHR) {
+	    controllerOrXHR.abort();
+	  }
+	}
+
+	function hasInflightRequests(cache) {
+	  return Object.keys(cache.inflight).length;
+	}
 
-	    var _action = getAction();
+	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];
+	  });
+	}
 
-	    function getAction() {
-	        // prefer a non-disabled action first
-	        var join = actionJoin(selectedIDs);
-	        if (!join.disabled(context.graph())) { return join; }
+	function getLoc(attrs) {
+	  var lon = attrs.lon && attrs.lon.value;
+	  var lat = attrs.lat && attrs.lat.value;
+	  return [parseFloat(lon), parseFloat(lat)];
+	}
 
-	        var merge = actionMerge(selectedIDs);
-	        if (!merge.disabled(context.graph())) { return merge; }
+	function getNodes(obj) {
+	  var elems = obj.getElementsByTagName('nd');
+	  var nodes = new Array(elems.length);
 
-	        var mergePolygon = actionMergePolygon(selectedIDs);
-	        if (!mergePolygon.disabled(context.graph())) { return mergePolygon; }
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    nodes[i] = 'n' + elems[i].attributes.ref.value;
+	  }
 
-	        var mergeNodes = actionMergeNodes(selectedIDs);
-	        if (!mergeNodes.disabled(context.graph())) { return mergeNodes; }
+	  return nodes;
+	}
 
-	        // 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; }
+	function getNodesJSON(obj) {
+	  var elems = obj.nodes;
+	  var nodes = new Array(elems.length);
 
-	        return mergeNodes;
-	    }
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    nodes[i] = 'n' + elems[i];
+	  }
 
-	    var operation = function() {
+	  return nodes;
+	}
 
-	        if (operation.disabled()) { return; }
+	function getTags(obj) {
+	  var elems = obj.getElementsByTagName('tag');
+	  var tags = {};
 
-	        context.perform(_action, operation.annotation());
+	  for (var i = 0, l = elems.length; i < l; i++) {
+	    var attrs = elems[i].attributes;
+	    tags[attrs.k.value] = attrs.v.value;
+	  }
 
-	        context.validator().validate();
+	  return tags;
+	}
 
-	        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));
-	    };
+	function getMembers(obj) {
+	  var elems = obj.getElementsByTagName('member');
+	  var members = new Array(elems.length);
 
-	    operation.available = function() {
-	        return selectedIDs.length >= 2;
+	  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
 	    };
+	  }
 
-	    operation.disabled = function() {
-	        var actionDisabled = _action.disabled(context.graph());
-	        if (actionDisabled) { return actionDisabled; }
+	  return members;
+	}
 
-	        var osm = context.connection();
-	        if (osm &&
-	            _action.resultingWayNodesLength &&
-	            _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
-	            return 'too_many_vertices';
-	        }
+	function getMembersJSON(obj) {
+	  var elems = obj.members;
+	  var members = new Array(elems.length);
 
-	        return false;
+	  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
 	    };
+	  }
 
-	    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 members;
+	}
+
+	function getVisible(attrs) {
+	  return !attrs.visible || attrs.visible.value !== 'false';
+	}
+
+	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;
+	          }
 	        }
-	        return _t('operations.merge.description');
-	    };
+	      }
 
-	    operation.annotation = function() {
-	        return _t('operations.merge.annotation', { n: selectedIDs.length });
-	    };
+	      if (parsedComment) {
+	        parsedComments.push(parsedComment);
+	      }
+	    }
+	  }
 
-	    operation.id = 'merge';
-	    operation.keys = [_t('operations.merge.key')];
-	    operation.title = _t('operations.merge.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	  return parsedComments;
+	}
 
-	    return operation;
+	function encodeNoteRtree(note) {
+	  return {
+	    minX: note.loc[0],
+	    minY: note.loc[1],
+	    maxX: note.loc[0],
+	    maxY: note.loc[1],
+	    data: note
+	  };
 	}
 
-	// see also `behaviorPaste`
-	function operationPaste(context) {
+	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)
+	    });
+	  }
+	};
 
-	    var _pastePoint;
+	function parseJSON(payload, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
+
+	  if (!payload) {
+	    return callback({
+	      message: 'No JSON',
+	      status: -1
+	    });
+	  }
 
-	    var operation = function() {
+	  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;
 
-	        if (!_pastePoint) { return; }
+	    for (var i = 0; i < children.length; i++) {
+	      result = parseChild(children[i]);
+	      if (result) results.push(result);
+	    }
 
-	        var oldIDs = context.copyIDs();
-	        if (!oldIDs.length) { return; }
+	    callback(null, results);
+	  });
 
-	        var projection = context.projection;
-	        var extent = geoExtent();
-	        var oldGraph = context.copyGraph();
-	        var newIDs = [];
+	  _deferred.add(handle);
 
-	        var action = actionCopyEntities(oldIDs, oldGraph);
-	        context.perform(action);
+	  function parseChild(child) {
+	    var parser = jsonparsers[child.type];
+	    if (!parser) return null;
+	    var uid;
+	    uid = osmEntity.id.fromOSM(child.type, child.id);
 
-	        var copies = action.copies();
-	        var originals = new Set();
-	        Object.values(copies).forEach(function(entity) { originals.add(entity.id); });
+	    if (options.skipSeen) {
+	      if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-	        for (var id in copies) {
-	            var oldEntity = oldGraph.entity(id);
-	            var newEntity = copies[id];
+	      _tileCache.seen[uid] = true;
+	    }
 
-	            extent._extend(oldEntity.extent(oldGraph));
+	    return parser(child, uid);
+	  }
+	}
 
-	            // 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);
-	            });
+	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
 
-	            if (!parentCopied) {
-	                newIDs.push(newEntity.id);
-	            }
-	        }
+	    var coincident = false;
+	    var epsilon = 0.00001;
 
-	        // 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);
+	    do {
+	      if (coincident) {
+	        props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
+	      }
 
-	        // 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 bbox = geoExtent(props.loc).bbox();
+	      coincident = _noteCache.rtree.search(bbox).length;
+	    } while (coincident); // parse note contents
 
-	    operation.point = function(val) {
-	        _pastePoint = val;
-	        return operation;
-	    };
 
-	    operation.available = function() {
-	        return context.mode().id === 'browse';
-	    };
+	    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
 
-	    operation.disabled = function() {
-	        return !context.copyIDs().length;
-	    };
+	      if (nodeName === 'comments') {
+	        props[nodeName] = parseComments(node.childNodes);
+	      } else {
+	        props[nodeName] = node.textContent;
+	      }
+	    }
 
-	    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() });
-	    };
+	    var note = new osmNote(props);
+	    var item = encodeNoteRtree(note);
+	    _noteCache.note[note.id] = note;
 
-	    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() });
+	    _noteCache.rtree.insert(item);
+
+	    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');
 
-	    operation.id = 'paste';
-	    operation.keys = [uiCmd('⌘V')];
-	    operation.title = _t('operations.paste.title');
+	    if (img && img[0] && img[0].getAttribute('href')) {
+	      user.image_url = img[0].getAttribute('href');
+	    }
 
-	    return operation;
-	}
+	    var changesets = obj.getElementsByTagName('changesets');
 
-	function operationReverse(context, selectedIDs) {
+	    if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
+	      user.changesets_count = changesets[0].getAttribute('count');
+	    }
 
-	    var operation = function() {
-	        context.perform(function combinedReverseAction(graph) {
-	            actions().forEach(function(action) {
-	                graph = action(graph);
-	            });
-	            return graph;
-	        }, operation.annotation());
-	        context.validator().validate();
-	    };
+	    var blocks = obj.getElementsByTagName('blocks');
 
-	    function actions(situation) {
-	        return selectedIDs.map(function(entityID) {
-	            var entity = context.hasEntity(entityID);
-	            if (!entity) { return; }
+	    if (blocks && blocks[0]) {
+	      var received = blocks[0].getElementsByTagName('received');
 
-	            if (situation === 'toolbar') {
-	                if (entity.type === 'way' &&
-	                    (!entity.isOneWay() && !entity.isSided())) { return; }
-	            }
+	      if (received && received[0] && received[0].getAttribute('active')) {
+	        user.active_blocks = received[0].getAttribute('active');
+	      }
+	    }
 
-	            var geometry = entity.geometry(context.graph());
-	            if (entity.type !== 'node' && geometry !== 'line') { return; }
+	    _userCache.user[uid] = user;
+	    delete _userCache.toLoad[uid];
+	    return user;
+	  }
+	};
 
-	            var action = actionReverse(entityID);
-	            if (action.disabled(context.graph())) { return; }
+	function parseXML(xml, callback, options) {
+	  options = Object.assign({
+	    skipSeen: true
+	  }, options);
+
+	  if (!xml || !xml.childNodes) {
+	    return callback({
+	      message: 'No XML',
+	      status: -1
+	    });
+	  }
 
-	            return action;
-	        }).filter(Boolean);
-	    }
+	  var root = xml.childNodes[0];
+	  var children = root.childNodes;
+	  var handle = window.requestIdleCallback(function () {
+	    var results = [];
+	    var result;
 
-	    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;
+	    for (var i = 0; i < children.length; i++) {
+	      result = parseChild(children[i]);
+	      if (result) results.push(result);
 	    }
 
+	    callback(null, results);
+	  });
 
-	    operation.available = function(situation) {
-	        return actions(situation).length > 0;
-	    };
+	  _deferred.add(handle);
 
+	  function parseChild(child) {
+	    var parser = parsers[child.nodeName];
+	    if (!parser) return null;
+	    var uid;
 
-	    operation.disabled = function() {
-	        return false;
-	    };
+	    if (child.nodeName === 'user') {
+	      uid = child.attributes.id.value;
 
+	      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);
 
-	    operation.tooltip = function() {
-	        return _t('operations.reverse.description.' + reverseTypeID());
-	    };
+	      if (options.skipSeen) {
+	        if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
+	        _tileCache.seen[uid] = true;
+	      }
+	    }
 
-	    operation.annotation = function() {
-	        return _t('operations.reverse.annotation.' + reverseTypeID());
-	    };
+	    return parser(child, uid);
+	  }
+	} // replace or remove note from rtree
 
 
-	    operation.id = 'reverse';
-	    operation.keys = [_t('operations.reverse.key')];
-	    operation.title = _t('operations.reverse.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	function updateRtree$3(item, replace) {
+	  _noteCache.rtree.remove(item, function isEql(a, b) {
+	    return a.data.id === b.data.id;
+	  });
 
-	    return operation;
+	  if (replace) {
+	    _noteCache.rtree.insert(item);
+	  }
 	}
 
-	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 = [];
+	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();
+	      }
 
-	    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());
+	      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);
 	    }
+	  };
+	}
 
+	var serviceOsm = {
+	  init: function init() {
+	    utilRebind(this, dispatch$6, 'on');
+	  },
+	  reset: function reset() {
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	    var operation = function() {
-	        var difference = context.perform(action, operation.annotation());
-	        context.enter(modeSelect(context, difference.extantIDs()));
+	      _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()
 	    };
-
-
-	    operation.available = function() {
-	        return vertices.length === 1;
+	    _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;
 
+	    function done(err, payload) {
+	      if (that.getConnectionId() !== cid) {
+	        if (callback) callback({
+	          message: 'Connection Switched',
+	          status: -1
+	        });
+	        return;
+	      }
 
-	    operation.disabled = function() {
-	        var reason = action.disabled(context.graph());
-	        if (reason) {
-	            return reason;
-	        } else if (selectedIDs.some(context.hasHiddenConnections)) {
-	            return 'connected_to_hidden';
-	        }
-
-	        return false;
-	    };
+	      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); // 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);
+	            }
+	          }
+	        }
+	      }
+	    }
 
-	    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));
+	    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 {
-	            return _t('operations.split.description.multiple');
+	          done(err.message);
 	        }
+	      });
+	      return controller;
+	    }
+	  },
+	  // 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
+	    };
+	    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
 
+	      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));
+	    }
 
-	    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 createdChangeset(err, changesetID) {
+	      _changeset.inflight = null;
 
+	      if (err) {
+	        return callback(err, changeset);
+	      }
 
-	    operation.id = 'split';
-	    operation.keys = [_t('operations.split.key')];
-	    operation.title = _t('operations.split.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	      _changeset.open = changesetID;
+	      changeset = changeset.update({
+	        id: changesetID
+	      }); // Upload the changeset..
 
-	    return operation;
-	}
+	      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 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 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.
 
-	                startNodeIDs.push(entity.first());
-	                endNodeIDs.push(entity.last());
+	      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;
+	        });
+	      }
+	    }
+	  },
+	  // 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
+	    }
+
+	    utilArrayChunk(toLoad, 150).forEach(function (arr) {
+	      oauth.xhr({
+	        method: 'GET',
+	        path: '/api/0.6/users?users=' + arr.join()
+	      }, wrapcb(this, done, _connectionID));
+	    }.bind(this));
+
+	    function done(err, xml) {
+	      if (err) {
+	        return callback(err);
+	      }
+
+	      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]);
+	    }
 
-	            // 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);
-	            });
+	    oauth.xhr({
+	      method: 'GET',
+	      path: '/api/0.6/user/' + uid
+	    }, wrapcb(this, done, _connectionID));
 
-	            // 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 done(err, xml) {
+	      if (err) {
+	        return callback(err);
+	      }
 
-	            // 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; }
+	      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 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; }
+	    oauth.xhr({
+	      method: 'GET',
+	      path: '/api/0.6/user/details'
+	    }, wrapcb(this, done, _connectionID));
 
-	            if (_nodeIDs.length) {
-	                // If we're only straightenting between two points, we only need that extent visible
-	                _extent = utilTotalExtent(_nodeIDs, context.graph());
-	            }
+	    function done(err, xml) {
+	      if (err) {
+	        return callback(err);
+	      }
 
-	            _geometry = _wayIDs.length === 1 ? 'line' : 'lines';
-	            return actionStraightenWay(selectedIDs, context.projection);
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
+	        } else {
+	          _userDetails = results[0];
+	          return callback(undefined, _userDetails);
 	        }
-
-	        return null;
+	      }, 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);
 	    }
 
+	    this.userDetails(wrapcb(this, gotDetails, _connectionID));
 
-	    function operation() {
-	        if (!_action) { return; }
-
-	        context.perform(_action, operation.annotation());
+	    function gotDetails(err, user) {
+	      if (err) {
+	        return callback(err);
+	      }
 
-	        window.setTimeout(function() {
-	            context.validator().validate();
-	        }, 300);  // after any transition
+	      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);
+	      }
 
-	    operation.available = function() {
-	        return Boolean(_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 !== '';
+	      });
+	      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);
+	    });
 
+	    function done(err, xml) {
+	      if (err) {
+	        // the status is null if no response could be retrieved
+	        return callback(err, null);
+	      } // update blocklists
 
-	    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;
+	      var elements = xml.getElementsByTagName('blacklist');
+	      var regexes = [];
 
+	      for (var i = 0; i < elements.length; i++) {
+	        var regexString = elements[i].getAttribute('regex'); // needs unencode?
 
-	        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 (regexString) {
+	          try {
+	            var regex = new RegExp(regexString);
+	            regexes.push(regex);
+	          } catch (e) {
+	            /* noop */
+	          }
 	        }
-	    };
-
+	      }
 
-	    operation.tooltip = function() {
-	        var disable = operation.disabled();
-	        return disable ?
-	            _t('operations.straighten.' + disable + '.' + _amount) :
-	            _t('operations.straighten.description.' + _geometry);
-	    };
+	      if (regexes.length) {
+	        _imageryBlocklists = regexes;
+	      }
 
+	      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);
+	    }
 
-	    operation.annotation = function() {
-	        return _t('operations.straighten.annotation.' + _geometry);
-	    };
+	    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
 
+	    var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	    operation.id = 'straighten';
-	    operation.keys = [_t('operations.straighten.key')];
-	    operation.title = _t('operations.straighten.title');
-	    operation.behavior = behaviorOperation(context).which(operation);
+	    var hadRequests = hasInflightRequests(_tileCache);
+	    abortUnwantedRequests$3(_tileCache, tiles);
 
-	    return operation;
-	}
+	    if (hadRequests && !hasInflightRequests(_tileCache)) {
+	      dispatch$6.call('loaded'); // stop the spinner
+	    } // issue new requests..
 
-	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;
+	    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
+	    }
 
-	function modeSelect(context, selectedIDs) {
-	    var mode = {
-	        id: 'select',
-	        button: 'browse'
+	    var path = '/api/0.6/map.json?bbox=';
+	    var options = {
+	      skipSeen: true
 	    };
+	    _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);
 
-	    var keybinding = utilKeybinding('select');
+	    function tileCallback(err, parsed) {
+	      delete _tileCache.inflight[tile.id];
 
-	    var _breatheBehavior = behaviorBreathe();
-	    var _modeDragNode = modeDragNode(context);
-	    var _selectBehavior;
-	    var _behaviors = [];
-
-	    var _operations = [];
-	    var _newFeature = false;
-	    var _follow = false;
+	      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);
+	      }
 
-	    function singular() {
-	        if (selectedIDs && selectedIDs.length === 1) {
-	            return context.hasEntity(selectedIDs[0]);
-	        }
-	    }
+	      if (callback) {
+	        callback(err, Object.assign({
+	          data: parsed
+	        }, tile));
+	      }
 
-	    function selectedEntities() {
-	        return selectedIDs.map(function(id) {
-	            return context.hasEntity(id);
-	        }).filter(Boolean);
+	      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=';
 
-
-	    function checkSelectedIDs() {
-	        var ids = [];
-	        if (Array.isArray(selectedIDs)) {
-	            ids = selectedIDs.filter(function(id) {
-	                return context.hasEntity(id);
-	            });
-	        }
-
-	        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;
-	        }
-
-	        selectedIDs = ids;
-	        return true;
-	    }
+	    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
 
 
-	    // find the common parent ways for nextVertex, previousVertex
-	    function commonParents() {
-	        var graph = context.graph();
-	        var commonParents = [];
+	    var tiles = tiler$5.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-	        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
-	            }
+	    abortUnwantedRequests$3(_noteCache, tiles); // issue new requests..
 
-	            var currParents = graph.parentWays(entity).map(function(w) { return w.id; });
-	            if (!commonParents.length) {
-	                commonParents = currParents;
-	                continue;
-	            }
+	    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];
 
-	            commonParents = utilArrayIntersection(commonParents, currParents);
-	            if (!commonParents.length) {
-	                return [];
-	            }
+	        if (!err) {
+	          _noteCache.loaded[tile.id] = true;
 	        }
 
-	        return commonParents;
+	        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);
 	    }
 
+	    if (_noteCache.inflightPost[note.id]) {
+	      return callback({
+	        message: 'Note update already inflight',
+	        status: -2
+	      }, note);
+	    }
 
-	    function singularParent() {
-	        var parents = commonParents();
-	        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.
-
-	        if (parents.length === 1) {
-	            _relatedParent = parents[0];  // remember this parent for later
-	            return _relatedParent;
-	        }
+	    if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required
 
-	        if (parents.indexOf(_relatedParent) !== -1) {
-	            return _relatedParent;   // prefer the previously seen parent
-	        }
+	    var comment = note.newComment;
 
-	        return parents[0];
+	    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));
 
-	    mode.selectedIDs = function(val) {
-	        if (!arguments.length) { return selectedIDs; }
-	        selectedIDs = val;
-	        return mode;
-	    };
+	    function done(err, xml) {
+	      delete _noteCache.inflightPost[note.id];
 
+	      if (err) {
+	        return callback(err);
+	      } // we get the updated note back, remove from caches and reparse..
 
-	    mode.zoomToSelected = function() {
-	        context.map().zoomToEase(selectedEntities());
-	    };
 
+	      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
+	    }
 
-	    mode.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return mode;
-	    };
+	    var path = '/api/0.6/notes/' + note.id + '/' + action;
 
+	    if (note.newComment) {
+	      path += '?' + utilQsString({
+	        text: note.newComment
+	      });
+	    }
 
-	    mode.selectBehavior = function(val) {
-	        if (!arguments.length) { return _selectBehavior; }
-	        _selectBehavior = val;
-	        return mode;
-	    };
+	    _noteCache.inflightPost[note.id] = oauth.xhr({
+	      method: 'POST',
+	      path: path
+	    }, wrapcb(this, done, _connectionID));
 
+	    function done(err, xml) {
+	      delete _noteCache.inflightPost[note.id];
 
-	    mode.follow = function(val) {
-	        if (!arguments.length) { return _follow; }
-	        _follow = val;
-	        return mode;
-	    };
+	      if (err) {
+	        return callback(err);
+	      } // we get the updated note back, remove from caches and reparse..
 
-	    function loadOperations() {
 
-	        _operations.forEach(function(operation) {
-	            if (operation.behavior) {
-	                context.uninstall(operation.behavior);
-	            }
-	        });
+	      this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag
 
-	        _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'; });
+	      if (action === 'close') {
+	        _noteCache.closed[note.id] = true;
+	      } else if (action === 'reopen') {
+	        delete _noteCache.closed[note.id];
+	      }
 
-	        var copyOperation = operationCopy(context, selectedIDs);
-	        if (copyOperation.available()) {
-	            // group copy operation with delete/downgrade
-	            _operations.push(copyOperation);
+	      var options = {
+	        skipSeen: false
+	      };
+	      return parseXML(xml, function (err, results) {
+	        if (err) {
+	          return callback(err);
+	        } else {
+	          return callback(undefined, results[0]);
 	        }
+	      }, 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
+	        }
+	      });
+	      return target;
+	    }
 
-	        var downgradeOperation = operationDowngrade(context, selectedIDs);
-	        // don't allow delete if downgrade is available
-	        var lastOperation = !context.inIntro() && downgradeOperation.available() ? downgradeOperation : operationDelete(context, selectedIDs);
-
-	        _operations.push(lastOperation);
+	    if (!arguments.length) {
+	      return {
+	        tile: cloneCache(_tileCache),
+	        note: cloneCache(_noteCache),
+	        user: cloneCache(_userCache)
+	      };
+	    } // access caches directly for testing (e.g., loading notes rtree)
 
-	        _operations.forEach(function(operation) {
-	            if (operation.behavior) {
-	                context.install(operation.behavior);
-	            }
-	        });
 
-	        // remove any displayed menu
-	        context.ui().closeEditMenu();
+	    if (obj === 'get') {
+	      return {
+	        tile: _tileCache,
+	        note: _noteCache,
+	        user: _userCache
+	      };
 	    }
 
-	    mode.operations = function() {
-	        return _operations;
-	    };
-
+	    if (obj.tile) {
+	      _tileCache = obj.tile;
+	      _tileCache.inflight = {};
+	    }
 
-	    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());
-	            });
+	    if (obj.note) {
+	      _noteCache = obj.note;
+	      _noteCache.inflight = {};
+	      _noteCache.inflightPost = {};
+	    }
 
-	        context.map().doubleUpHandler()
-	            .on('doubleUp.modeSelect', didDoubleUp);
+	    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;
 
-	        selectElements();
+	    function done(err, res) {
+	      if (err) {
+	        if (callback) callback(err);
+	        return;
+	      }
 
-	        if (_follow) {
-	            var extent = geoExtent();
-	            var graph = context.graph();
-	            selectedIDs.forEach(function(id) {
-	                var entity = context.entity(id);
-	                extent._extend(entity.extent(graph));
-	            });
+	      if (that.getConnectionId() !== cid) {
+	        if (callback) callback({
+	          message: 'Connection Switched',
+	          status: -1
+	        });
+	        return;
+	      }
 
-	            var loc = extent.center();
-	            context.map().centerEase(loc);
-	            // we could enter the mode multiple times, so reset follow for next time
-	            _follow = false;
-	        }
+	      _rateLimitError = undefined;
+	      dispatch$6.call('change');
+	      if (callback) callback(err, res);
+	      that.userChangesets(function () {}); // eagerly load user details/changesets
+	    }
 
+	    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
 
-	        function nudgeSelection(delta) {
-	            return function() {
-	                // prevent nudging during low zoom selection
-	                if (!context.map().withinEditableZoom()) { return; }
+	    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();
+	  }
+	};
 
-	                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());
-	                }
-	            };
-	        }
+	var _apibase = 'https://wiki.openstreetmap.org/w/api.php';
+	var _inflight$1 = {};
+	var _wikibaseCache = {};
+	var _localeIDs = {
+	  en: false
+	};
 
+	var debouncedRequest = debounce(request, 500, {
+	  leading: false
+	});
 
-	        function didDoubleUp(loc) {
-	            if (!context.map().withinEditableZoom()) { return; }
+	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);
+	  });
+	}
 
-	            var target = select(event.target);
+	var serviceOsmWikibase = {
+	  init: function init() {
+	    _inflight$1 = {};
+	    _wikibaseCache = {};
+	    _localeIDs = {};
+	  },
+	  reset: function reset() {
+	    Object.values(_inflight$1).forEach(function (controller) {
+	      controller.abort();
+	    });
+	    _inflight$1 = {};
+	  },
 
-	            var datum = target.datum();
-	            var entity = datum && datum.properties && datum.properties.entity;
-	            if (!entity) { return; }
+	  /**
+	   * 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;
+	      }
 
-	            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];
+	      if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
+	        localePick = stmt;
+	      }
+	    });
+	    var result = localePick || preferredPick;
 
-	                context.perform(
-	                    actionAddMidpoint({ loc: choice.loc, edge: [prev, next] }, osmNode()),
-	                    _t('operations.add.annotation.vertex')
-	                );
+	    if (result) {
+	      var datavalue = result.mainsnak.datavalue;
+	      return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
+	    } else {
+	      return undefined;
+	    }
+	  },
 
-	            } else if (entity.type === 'midpoint') {
-	                context.perform(
-	                    actionAddMidpoint({ loc: entity.loc, edge: entity.edge }, osmNode()),
-	                    _t('operations.add.annotation.vertex'));
-	            }
+	  /**
+	   * 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);
+	      }
+	    }
 
-	        function selectElements() {
-	            if (!checkSelectedIDs()) { return; }
-
-	            var surface = context.surface();
-
-	            surface.selectAll('.selected-member')
-	                .classed('selected-member', false);
-
-	            surface.selectAll('.selected')
-	                .classed('selected', false);
+	    if (keySitelink) {
+	      if (_wikibaseCache[keySitelink]) {
+	        result.key = _wikibaseCache[keySitelink];
+	      } else {
+	        titles.push(keySitelink);
+	      }
+	    }
 
-	            surface.selectAll('.related')
-	                .classed('related', false);
+	    if (tagSitelink) {
+	      if (_wikibaseCache[tagSitelink]) {
+	        result.tag = _wikibaseCache[tagSitelink];
+	      } else {
+	        titles.push(tagSitelink);
+	      }
+	    }
 
-	            singularParent();
-	            if (_relatedParent) {
-	                surface.selectAll(utilEntitySelector([_relatedParent]))
-	                    .classed('related', true);
-	            }
+	    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"}}
 
-	            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);
+	    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);
 	        }
 
+	        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;
+	      }
 
-	        function esc() {
-	            if (context.container().select('.combobox').size()) { return; }
-	            context.enter(modeBrowse(context));
-	        }
+	      var entity = data.rtype || data.tag || data.key;
 
+	      if (!entity) {
+	        callback('No entity');
+	        return;
+	      }
 
-	        function firstVertex() {
-	            event.preventDefault();
-	            var entity = singular();
-	            var parent = singularParent();
-	            var way;
+	      var i;
+	      var description;
 
-	            if (entity && entity.type === 'way') {
-	                way = entity;
-	            } else if (parent) {
-	                way = context.entity(parent);
-	            }
+	      for (i in langCodes) {
+	        var _code = langCodes[i];
 
-	            if (way) {
-	                context.enter(
-	                    modeSelect(context, [way.first()]).follow(true)
-	                );
-	            }
+	        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
 
-	        function lastVertex() {
-	            event.preventDefault();
-	            var entity = singular();
-	            var parent = singularParent();
-	            var way;
+	      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]);
 
-	            if (entity && entity.type === 'way') {
-	                way = entity;
-	            } else if (parent) {
-	                way = context.entity(parent);
-	            }
+	          if (image) {
+	            imageroot = 'https://wiki.openstreetmap.org/w/index.php';
+	          }
+	        }
 
-	            if (way) {
-	                context.enter(
-	                    modeSelect(context, [way.last()]).follow(true)
-	                );
-	            }
+	        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.
 
 
-	        function previousVertex() {
-	            event.preventDefault();
-	            var parent = singularParent();
-	            if (!parent) { return; }
+	      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];
 
-	            var way = context.entity(parent);
-	            var length = way.nodes.length;
-	            var curr = way.nodes.indexOf(selectedIDs[0]);
-	            var index = -1;
+	      for (i in wikis) {
+	        var wiki = wikis[i];
 
-	            if (curr > 0) {
-	                index = curr - 1;
-	            } else if (way.isClosed()) {
-	                index = length - 2;
-	            }
+	        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);
 
-	            if (index !== -1) {
-	                context.enter(
-	                    modeSelect(context, [way.nodes[index]]).follow(true)
-	                );
-	            }
+	          if (info) {
+	            result.wiki = info;
+	            break;
+	          }
 	        }
 
+	        if (result.wiki) break;
+	      }
 
-	        function nextVertex() {
-	            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 < length - 1) {
-	                index = curr + 1;
-	            } else if (way.isClosed()) {
-	                index = 0;
-	            }
+	      callback(null, result); // Helper method to get wiki info if a given language exists
 
-	            if (index !== -1) {
-	                context.enter(
-	                    modeSelect(context, [way.nodes[index]]).follow(true)
-	                );
-	            }
+	      function getWikiInfo(wiki, langCode, tKey) {
+	        if (wiki && wiki[langCode]) {
+	          return {
+	            title: wiki[langCode],
+	            text: tKey,
+	            url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
+	          };
 	        }
+	      }
+	    });
+	  },
+	  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() {}
+	  };
 
-	        function nextParent() {
-	            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];
-	            }
+	  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);
 
-	            var surface = context.surface();
-	            surface.selectAll('.related')
-	                .classed('related', false);
+	      request.abort = function () {
+	        window.clearTimeout(t);
+	      };
+	    }
 
-	            if (_relatedParent) {
-	                surface.selectAll(utilEntitySelector([_relatedParent]))
-	                    .classed('related', true);
-	            }
-	        }
-	    };
+	    return request;
+	  }
 
+	  function rand() {
+	    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+	    var c = '';
+	    var i = -1;
 
-	    mode.exit = function() {
+	    while (++i < 15) {
+	      c += chars.charAt(Math.floor(Math.random() * 52));
+	    }
 
-	        _newFeature = false;
+	    return c;
+	  }
 
-	        _operations.forEach(function(operation) {
-	            if (operation.behavior) {
-	                context.uninstall(operation.behavior);
-	            }
-	        });
-	        _operations = [];
+	  function create(url) {
+	    var e = url.match(/callback=(\w+)/);
+	    var c = e ? e[1] : rand();
 
-	        _behaviors.forEach(context.uninstall);
+	    jsonpCache[c] = function (data) {
+	      if (jsonpCache[c]) {
+	        callback(data);
+	      }
 
-	        select(document)
-	            .call(keybinding.unbind);
+	      finalize();
+	    };
 
-	        context.ui().closeEditMenu();
+	    function finalize() {
+	      delete jsonpCache[c];
+	      script.remove();
+	    }
 
-	        context.history()
-	            .on('change.select', null)
-	            .on('undone.select', null)
-	            .on('redone.select', null);
+	    request.abort = finalize;
+	    return 'jsonpCache.' + c;
+	  }
 
-	        var surface = context.surface();
+	  var cb = create(url);
+	  var script = select('head').append('script').attr('type', 'text/javascript').attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
+	  return request;
+	}
 
-	        surface
-	            .selectAll('.selected-member')
-	            .classed('selected-member', false);
+	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
 
-	        surface
-	            .selectAll('.selected')
-	            .classed('selected', false);
+	var maxHfov = 90; // zoom out degrees
 
-	        surface
-	            .selectAll('.highlighted')
-	            .classed('highlighted', false);
+	var defaultHfov = 45;
+	var _hires = false;
+	var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096
 
-	        surface
-	            .selectAll('.related')
-	            .classed('related', false);
+	var _currScene = 0;
 
-	        context.map().on('drawn.select', null);
-	        context.ui().sidebar.hide();
-	        context.features().forceVisible([]);
+	var _ssCache;
 
-	        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 _pannellumViewer;
 
+	var _sceneOptions = {
+	  showFullscreenCtrl: false,
+	  autoLoad: true,
+	  compass: true,
+	  yaw: 0,
+	  minHfov: minHfov,
+	  maxHfov: maxHfov,
+	  hfov: defaultHfov,
+	  type: 'cubemap',
+	  cubeMap: []
+	};
 
-	    return mode;
-	}
+	var _loadViewerPromise$2;
+	/**
+	 * abortRequest().
+	 */
 
-	function uiLasso(context) {
-	    var group, polygon;
 
-	    lasso.coordinates = [];
+	function abortRequest$6(i) {
+	  i.abort();
+	}
+	/**
+	 * localeTimeStamp().
+	 */
 
-	    function lasso(selection) {
-	        context.container()
-	            .classed('lasso', true);
 
-	        group = selection
-	            .append('g')
-	            .attr('class', 'lasso hide');
+	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.
+	 */
 
-	        polygon = group
-	            .append('path')
-	            .attr('class', 'lasso-path');
 
-	        group
-	            .call(uiToggle(true));
-	    }
+	function loadTiles$2(which, url, projection, margin) {
+	  var tiles = tiler$6.margin(margin).getTiles(projection); // 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;
+	    });
 
-	    function draw() {
-	        if (polygon) {
-	            polygon.data([lasso.coordinates])
-	                .attr('d', function(d) { return 'M' + d.join(' L') + ' Z'; });
-	        }
+	    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.
+	 */
 
 
-	    lasso.extent = function () {
-	        return lasso.coordinates.reduce(function(extent, point) {
-	            return extent.extend(geoExtent(point));
-	        }, geoExtent());
-	    };
-
-
-	    lasso.p = function(_) {
-	        if (!arguments.length) { return lasso; }
-	        lasso.coordinates.push(_);
-	        draw();
-	        return lasso;
-	    };
+	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
 
+	    bubbles.shift();
+	    var features = bubbles.map(function (bubble) {
+	      if (cache.points[bubble.id]) return null; // skip duplicates
 
-	    lasso.close = function() {
-	        if (group) {
-	            group.call(uiToggle(false, function() {
-	                select(this).remove();
-	            }));
-	        }
-	        context.container().classed('lasso', false);
-	    };
+	      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
 
+	      if (bubble.pr === undefined) {
+	        cache.leaders.push(bubble.id);
+	      }
 
-	    return lasso;
-	}
+	      return {
+	        minX: loc[0],
+	        minY: loc[1],
+	        maxX: loc[0],
+	        maxY: loc[1],
+	        data: d
+	      };
+	    }).filter(Boolean);
+	    cache.rtree.load(features);
+	    connectSequences();
 
-	function behaviorLasso(context) {
+	    if (which === 'bubbles') {
+	      dispatch$7.call('loadedImages');
+	    }
+	  });
+	} // call this sometimes to connect the bubbles into sequences
 
-	    // use pointer events on supported platforms; fallback to mouse events
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	    var behavior = function(selection) {
-	        var lasso;
+	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.
 
-	        function pointerdown() {
-	            var button = 0;  // left
-	            if (event.button === button && event.shiftKey === true) {
-	                lasso = null;
+	    var sequence = {
+	      key: bubble.key,
+	      bubbles: []
+	    };
+	    var complete = false;
 
-	                select(window)
-	                    .on(_pointerPrefix + 'move.lasso', pointermove)
-	                    .on(_pointerPrefix + 'up.lasso', pointerup);
+	    do {
+	      sequence.bubbles.push(bubble);
+	      seen[bubble.key] = true;
 
-	                event.stopPropagation();
-	            }
-	        }
+	      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
 
-	        function pointermove() {
-	            if (!lasso) {
-	                lasso = uiLasso(context);
-	                context.surface().call(lasso);
-	            }
+	      for (var j = 0; j < sequence.bubbles.length; j++) {
+	        sequence.bubbles[j].sequenceKey = sequence.key;
+	      } // create a GeoJSON LineString
 
-	            lasso.p(context.map().mouse());
-	        }
 
+	      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
 
-	        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])]
-	            ];
-	        }
 
+	  cache.leaders = keepLeaders;
+	}
+	/**
+	 * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
+	 */
 
-	        function lassoed() {
-	            if (!lasso) { return []; }
 
-	            var graph = context.graph();
-	            var limitToNodes;
+	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
 
-	            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 bounds = lasso.extent().map(context.projection.invert);
-	            var extent = geoExtent(normalize(bounds[0], bounds[1]));
+	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 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 tiler = utilTiler().zoomExtent([z2, z2]);
+	  return tiler.getTiles(projection).map(function (tile) {
+	    return tile.extent;
+	  });
+	} // no more than `limit` results per partition.
 
-	            // 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));
-	                    }
 
-	                } 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];
-	            });
+	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()
+	 */
 
-	            return intersects.map(function(entity) { return entity.id; });
-	        }
 
+	function loadImage(imgInfo) {
+	  return new Promise(function (resolve) {
+	    var img = new Image();
 
-	        function pointerup() {
-	            select(window)
-	                .on(_pointerPrefix + 'move.lasso', null)
-	                .on(_pointerPrefix + 'up.lasso', null);
+	    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'
+	      });
+	    };
 
-	            if (!lasso) { return; }
+	    img.onerror = function () {
+	      resolve({
+	        data: imgInfo,
+	        status: 'error'
+	      });
+	    };
 
-	            var ids = lassoed();
-	            lasso.close();
+	    img.setAttribute('crossorigin', '');
+	    img.src = imgInfo.url;
+	  });
+	}
+	/**
+	 * loadCanvas()
+	 */
 
-	            if (ids.length) {
-	                context.enter(modeSelect(context, ids));
-	            }
-	        }
 
-	        selection
-	            .on(_pointerPrefix + 'down.lasso', pointerdown);
+	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()
+	 */
 
 
-	    behavior.off = function(selection) {
-	        selection.on(_pointerPrefix + 'down.lasso', null);
+	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
 
-	    return behavior;
-	}
 
-	function modeBrowse(context) {
-	    var mode = {
-	        button: 'browse',
-	        id: 'browse',
-	        title: _t('modes.browse.title'),
-	        description: _t('modes.browse.description')
-	    };
-	    var sidebar;
+	  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);
+	}
 
-	    var _selectBehavior;
-	    var _behaviors = [];
+	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;
+	  }
 
-	    mode.selectBehavior = function(val) {
-	        if (!arguments.length) { return _selectBehavior; }
-	        _selectBehavior = val;
-	        return mode;
-	    };
+	  return [x, y];
+	}
 
+	function getQuadKeys() {
+	  var dim = _resolution / 256;
+	  var quadKeys;
 
-	    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);
+	  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'];
+	  }
 
-	        // Get focus on the body.
-	        if (document.activeElement && document.activeElement.blur) {
-	            document.activeElement.blur();
-	        }
+	  return quadKeys;
+	}
 
-	        if (sidebar) {
-	            context.ui().sidebar.show(sidebar);
-	        } else {
-	            context.ui().sidebar.select(null);
-	        }
-	    };
+	var serviceStreetside = {
+	  /**
+	   * init() initialize streetside.
+	   */
+	  init: function init() {
+	    if (!_ssCache) {
+	      this.reset();
+	    }
 
+	    this.event = utilRebind(this, dispatch$7, 'on');
+	  },
 
-	    mode.exit = function() {
-	        context.ui().sidebar.hover.cancel();
-	        _behaviors.forEach(context.uninstall);
+	  /**
+	   * reset() reset the cache.
+	   */
+	  reset: function reset() {
+	    if (_ssCache) {
+	      Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$6);
+	    }
 
-	        if (sidebar) {
-	            context.ui().sidebar.hide();
-	        }
+	    _ssCache = {
+	      bubbles: {
+	        inflight: {},
+	        loaded: {},
+	        nextPage: {},
+	        rtree: new RBush(),
+	        points: {},
+	        leaders: []
+	      },
+	      sequences: {}
 	    };
+	  },
 
+	  /**
+	   * 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
 
-	    mode.sidebar = function(_) {
-	        if (!arguments.length) { return sidebar; }
-	        sidebar = _;
-	        return mode;
-	    };
+	    _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);
+	      }
+	    });
 
-	    mode.operations = function() {
-	        return [operationPaste(context)];
-	    };
+	    return results;
+	  },
 
+	  /**
+	   * 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;
 
-	    return mode;
-	}
+	    var sceneID = _currScene.toString();
 
-	function behaviorAddWay(context) {
-	    var dispatch$1 = dispatch('start', 'startFromWay', 'startFromNode');
-	    var draw = behaviorDraw(context);
+	    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
 
-	    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);
+	    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)
 
-	        context.map()
-	            .dblclickZoomEnable(false);
+	    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
 
-	        surface.call(draw);
-	    }
+	    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');
 
-	    behavior.off = function(surface) {
-	        surface.call(draw.off);
-	    };
+	        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
 
+	    wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler
 
-	    behavior.cancel = function() {
-	        window.setTimeout(function() {
-	            context.map().dblclickZoomEnable(true);
-	        }, 1000);
+	    context.ui().photoviewer.on('resize.streetside', function () {
+	      if (_pannellumViewer) {
+	        _pannellumViewer.resize();
+	      }
+	    });
+	    _loadViewerPromise$2 = new Promise(function (resolve, reject) {
+	      var loadedCount = 0;
 
-	        context.enter(modeBrowse(context));
-	    };
+	      function loaded() {
+	        loadedCount += 1; // wait until both files are loaded
 
+	        if (loadedCount === 2) resolve();
+	      }
 
-	    return utilRebind(behavior, dispatch$1, 'on');
-	}
+	      var head = select('head'); // load streetside pannellum viewer css
 
-	function behaviorHash(context) {
+	      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
 
-	    // 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 = {};
+	      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;
 
-	        delete oldParams.id;
-	        var selected = context.selectedIDs().filter(function(id) {
-	            return context.hasEntity(id);
-	        });
-	        if (selected.length) {
-	            newParams.id = selected.join(',');
-	        }
+	    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;
 
-	        newParams.map = zoom.toFixed(2) +
-	            '/' + center[1].toFixed(precision) +
-	            '/' + center[0].toFixed(precision);
+	        var yaw = _pannellumViewer.getYaw();
 
-	        return Object.assign(oldParams, newParams);
-	    }
+	        var ca = selected.ca + yaw;
+	        var origin = selected.loc; // construct a search trapezoid pointing out from current bubble
 
-	    function computedHash() {
-	        return '#' + utilQsString(computedHashParameters(), true);
-	    }
+	        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
 
-	    function computedTitle(includeChangeCount) {
+	        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
 
-	        var baseTitle = context.documentTitleBase() || 'iD';
-	        var contextual;
-	        var changeCount;
-	        var titleID;
+	        var minDist = Infinity;
 
-	        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';
-	        }
+	        _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 (includeChangeCount) {
-	            changeCount = context.history().difference().summary().length;
-	            if (changeCount > 0) {
-	                titleID = contextual ? 'changes_context' : 'changes';
-	            }
-	        }
+	          if (minTheta > 20) {
+	            dist += 5; // penalize distance if camera angles don't match
+	          }
 
-	        if (titleID) {
-	            return _t('title.format.' + titleID, {
-	                changes: changeCount,
-	                base: baseTitle,
-	                context: contextual
-	            });
-	        }
+	          if (dist < minDist) {
+	            nextID = d.data.key;
+	            minDist = dist;
+	          }
+	        });
 
-	        return baseTitle;
+	        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;
+	  },
 
-	    function updateTitle(includeChangeCount) {
-	        if (!context.setsDocumentTitle()) { return; }
+	  /**
+	   * showViewer()
+	   */
+	  showViewer: function showViewer(context) {
+	    var wrap = context.container().select('.photoviewer').classed('hide', false);
+	    var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
 
-	        var newTitle = computedTitle(includeChangeCount);
-	        if (document.title !== newTitle) {
-	            document.title = newTitle;
-	        }
+	    if (isHidden) {
+	      wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
+	      wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
 	    }
 
-	    function updateHashIfNeeded() {
-	        if (context.inIntro()) { return; }
+	    return this;
+	  },
 
-	        var latestHash = computedHash();
-	        if (_cachedHash !== latestHash) {
-	            _cachedHash = latestHash;
+	  /**
+	   * 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);
+	  },
 
-	            // 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);
+	  /**
+	   * 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
 
-	            // set the title we want displayed for the browser tab/window
-	            updateTitle(true /* includeChangeCount */);
-	        }
+	    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('|');
 	    }
 
-	    var _throttledUpdate = throttle(updateHashIfNeeded, 500);
-	    var _throttledUpdateTitle = throttle(function() {
-	        updateTitle(true /* includeChangeCount */);
-	    }, 500);
+	    if (d.captured_at) {
+	      captureInfo.append('span').attr('class', 'captured_at').html(localeTimestamp(d.captured_at));
+	    } // Add image links
 
-	    function hashchange() {
 
-	        // ignore spurious hashchange events
-	        if (window.location.hash === _cachedHash) { return; }
+	    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;
 
-	        _cachedHash = window.location.hash;
+	    for (var i = 0; i < paddingNeeded; i++) {
+	      bubbleIdQuadKey = '0' + bubbleIdQuadKey;
+	    }
 
-	        var q = utilStringQs(_cachedHash);
-	        var mapArgs = (q.map || '').split('/').map(Number);
+	    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
 
-	        if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
-	            // replace bogus hash
-	            updateHashIfNeeded();
+	    var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces
 
-	        } else {
-	            // don't update if the new hash already reflects the state of iD
-	            if (_cachedHash === computedHash()) { return; }
+	    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;
 
-	            var mode = context.mode();
+	        var sceneID = _currScene.toString();
 
-	            context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);
+	        _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene
 
-	            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 center = context.map().center();
-	            var dist = geoSphericalDistance(center, [mapArgs[2], mapArgs[1]]);
-	            var maxdist = 500;
+	        if (_currScene > 2) {
+	          sceneID = (_currScene - 1).toString();
 
-	            // 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;
-	            }
+	          _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);
 	    }
 
-	    function behavior() {
-	        context.map()
-	            .on('move.behaviorHash', _throttledUpdate);
+	    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
 
-	        context.history()
-	            .on('change.behaviorHash', _throttledUpdateTitle);
+	    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
 
-	        context
-	            .on('enter.behaviorHash', _throttledUpdate);
+	    context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
 
-	        select(window)
-	            .on('hashchange.behaviorHash', hashchange);
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	        if (window.location.hash) {
-	            var q = utilStringQs(window.location.hash);
+	      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 (q.id) {
-	                //if (!context.history().hasRestorableChanges()) {
-	                    // targeting specific features: download, select, and zoom to them
-	                    context.zoomToEntity(q.id.split(',')[0], !q.map);
-	                //}
-	            }
+	    return this;
+	  },
+	  updateUrlImage: function updateUrlImage(imageKey) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	            if (q.walkthrough === 'true') {
-	                behavior.startWalkthrough = true;
-	            }
+	      if (imageKey) {
+	        hash.photo = 'streetside/' + imageKey;
+	      } else {
+	        delete hash.photo;
+	      }
 
-	            if (q.map) {
-	                behavior.hadHash = true;
-	            }
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
+	  },
 
-	            hashchange();
+	  /**
+	   * cache().
+	   */
+	  cache: function cache() {
+	    return _ssCache;
+	  }
+	};
 
-	            updateTitle(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'
+	};
 
-	    behavior.off = function() {
-	        _throttledUpdate.cancel();
-	        _throttledUpdateTitle.cancel();
+	function sets(params, n, o) {
+	  if (params.geometry && o[params.geometry]) {
+	    params[n] = o[params.geometry];
+	  }
 
-	        context.map()
-	            .on('move.behaviorHash', null);
+	  return params;
+	}
 
-	        context
-	            .on('enter.behaviorHash', null);
+	function setFilter(params) {
+	  return sets(params, 'filter', tag_filters);
+	}
 
-	        select(window)
-	            .on('hashchange.behaviorHash', null);
+	function setSort(params) {
+	  return sets(params, 'sortname', tag_sorts);
+	}
 
-	        window.location.hash = '';
-	    };
+	function setSortMembers(params) {
+	  return sets(params, 'sortname', tag_sort_members);
+	}
 
-	    return behavior;
+	function clean(params) {
+	  return utilObjectOmit(params, ['geometry', 'debounce']);
 	}
 
-	/*
-	    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 = {};
+	function filterKeys(type) {
+	  var count_type = type ? 'count_' + type : 'count_all';
+	  return function (d) {
+	    return parseFloat(d[count_type]) > 2500 || d.in_wiki;
+	  };
+	}
 
-	    function checkEntityID(id) {
-	        var h = head.entities[id];
-	        var b = base.entities[id];
+	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 (h === b) { return; }
-	        if (_changes[id]) { return; }
+	function filterValues(allowUpperCase) {
+	  return function (d) {
+	    if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation
 
-	        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;
-	        }
+	    if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters
 
-	        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;
-	            }
-	        }
-	    }
+	    return parseFloat(d.fraction) > 0.0;
+	  };
+	}
 
-	    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]);
-	        }
-	    }
-	    load();
+	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
 
-	    _diff.length = function length() {
-	        return Object.keys(_changes).length;
-	    };
+	    return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
+	  };
+	}
 
+	function valKey(d) {
+	  return {
+	    value: d.key,
+	    title: d.key
+	  };
+	}
 
-	    _diff.changes = function changes() {
-	        return _changes;
-	    };
+	function valKeyDescription(d) {
+	  var obj = {
+	    value: d.value,
+	    title: d.description || d.value
+	  };
 
-	    _diff.didChange = _didChange;
+	  if (d.count) {
+	    obj.count = d.count;
+	  }
 
+	  return obj;
+	}
 
-	    // 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);
-	            }
+	function roleKey(d) {
+	  return {
+	    value: d.role,
+	    title: d.role
+	  };
+	} // sort keys with ':' lower than keys without ':'
 
-	            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);
-	                    }
-	                });
-	            }
-	        });
+	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 Array.from(result);
-	    };
+	var debouncedRequest$1 = debounce(request$1, 300, {
+	  leading: false
+	});
 
+	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);
+	  });
+	}
 
-	    _diff.modified = function modified() {
-	        var result = [];
-	        Object.values(_changes).forEach(function(change) {
-	            if (change.base && change.head) {
-	                result.push(change.head);
-	            }
-	        });
-	        return result;
-	    };
+	function checkCache(url, params, exactMatch, callback) {
+	  var rp = params.rp || 25;
+	  var testQuery = params.query || '';
+	  var testUrl = url;
 
+	  do {
+	    var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)
 
-	    _diff.created = function created() {
-	        var result = [];
-	        Object.values(_changes).forEach(function(change) {
-	            if (!change.base && change.head) {
-	                result.push(change.head);
-	            }
-	        });
-	        return result;
-	    };
+	    if (hit && (url === testUrl || hit.length < rp)) {
+	      callback(null, hit);
+	      return true;
+	    } // don't try to shorten the query
 
 
-	    _diff.deleted = function deleted() {
-	        var result = [];
-	        Object.values(_changes).forEach(function(change) {
-	            if (change.base && !change.head) {
-	                result.push(change.base);
-	            }
-	        });
-	        return result;
-	    };
+	    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)
 
+	    testQuery = testQuery.slice(0, -1);
+	    testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
+	  } while (testQuery.length >= 0);
 
-	    _diff.summary = function summary() {
-	        var relevant = {};
+	  return false;
+	}
+
+	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 keys = Object.keys(_changes);
-	        for (var i = 0; i < keys.length; i++) {
-	            var change = _changes[keys[i]];
+	    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);
+	      }
+	    });
+	  },
+	  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;
 
-	            if (change.head && change.head.geometry(head) !== 'vertex') {
-	                addEntity(change.head, head, change.base ? 'modified' : 'created');
+	    if (key && _popularKeys[key]) {
+	      callback(null, []);
+	      return;
+	    }
 
-	            } else if (change.base && change.base.geometry(base) !== 'vertex') {
-	                addEntity(change.base, base, 'deleted');
+	    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?';
 
-	            } 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);
+	    if (params.value) {
+	      path = 'tag/wiki_pages?';
+	    } else if (params.rtype) {
+	      path = 'relation/wiki_pages?';
+	    }
 
-	                if (moved) {
-	                    addParents(change.head);
-	                }
+	    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;
+	  }
+	};
 
-	                if (retagged || (moved && change.head.hasInterestingTags())) {
-	                    addEntity(change.head, head, 'modified');
-	                }
+	var helpers$1 = createCommonjsModule(function (module, exports) {
 
-	            } else if (change.head && change.head.hasInterestingTags()) { // created vertex
-	                addEntity(change.head, head, 'created');
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
+	  /**
+	   * @module helpers
+	   */
 
-	            } else if (change.base && change.base.hasInterestingTags()) { // deleted vertex
-	                addEntity(change.base, base, 'deleted');
-	            }
-	        }
+	  /**
+	   * 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}
+	   */
 
-	        return Object.values(relevant);
+	  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 addEntity(entity, graph, changeType) {
-	            relevant[entity.id] = {
-	                entity: entity,
-	                graph: graph,
-	                changeType: changeType
-	            };
-	        }
+	  function feature(geom, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	        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');
-	                }
-	            }
-	        }
+	    var feat = {
+	      type: "Feature"
 	    };
 
+	    if (options.id === 0 || options.id) {
+	      feat.id = options.id;
+	    }
 
-	    // returns complete set of entities that require a redraw
-	    //  (optionally within given `extent`)
-	    _diff.complete = function complete(extent) {
-	        var result = {};
-	        var id, change;
+	    if (options.bbox) {
+	      feat.bbox = options.bbox;
+	    }
 
-	        for (id in _changes) {
-	            change = _changes[id];
+	    feat.properties = properties || {};
+	    feat.geometry = geom;
+	    return feat;
+	  }
 
-	            var h = change.head;
-	            var b = change.base;
-	            var entity = h || b;
-	            var i;
+	  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
+	   */
 
-	            if (extent &&
-	                (!h || !h.intersects(extent, head)) &&
-	                (!b || !b.intersects(extent, base)))
-	                { continue; }
+	  function geometry(type, coordinates, options) {
 
-	            result[id] = h;
+	    switch (type) {
+	      case "Point":
+	        return point(coordinates).geometry;
 
-	            if (entity.type === 'way') {
-	                var nh = h ? h.nodes : [];
-	                var nb = b ? b.nodes : [];
-	                var diff;
+	      case "LineString":
+	        return lineString(coordinates).geometry;
 
-	                diff = utilArrayDifference(nh, nb);
-	                for (i = 0; i < diff.length; i++) {
-	                    result[diff[i]] = head.hasEntity(diff[i]);
-	                }
+	      case "Polygon":
+	        return polygon(coordinates).geometry;
 
-	                diff = utilArrayDifference(nb, nh);
-	                for (i = 0; i < diff.length; i++) {
-	                    result[diff[i]] = head.hasEntity(diff[i]);
-	                }
-	            }
+	      case "MultiPoint":
+	        return multiPoint(coordinates).geometry;
 
-	            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;
-	                }
-	            }
+	      case "MultiLineString":
+	        return multiLineString(coordinates).geometry;
 
-	            addParents(head.parentWays(entity), result);
-	            addParents(head.parentRelations(entity), result);
-	        }
+	      case "MultiPolygon":
+	        return multiPolygon(coordinates).geometry;
 
-	        return result;
+	      default:
+	        throw new Error(type + " is invalid");
+	    }
+	  }
 
+	  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 addParents(parents, result) {
-	            for (var i = 0; i < parents.length; i++) {
-	                var parent = parents[i];
-	                if (parent.id in result) { continue; }
+	  function point(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	                result[parent.id] = parent;
-	                addParents(head.parentRelations(parent), result);
-	            }
-	        }
+	    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
+	   */
 
-	    return _diff;
-	}
-
-	function coreTree(head) {
-	    // tree for entities
-	    var _rtree = new RBush();
-	    var _bboxes = {};
-
-	    // maintain a separate tree for granular way segments
-	    var _segmentsRTree = new RBush();
-	    var _segmentsBBoxes = {};
-	    var _segmentsByWayId = {};
-
-	    var tree = {};
-
-
-	    function entityBBox(entity) {
-	        var bbox = entity.extent(head).bbox();
-	        bbox.id = entity.id;
-	        _bboxes[entity.id] = bbox;
-	        return bbox;
+	  function points(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
 	    }
 
+	    return featureCollection(coordinates.map(function (coords) {
+	      return point(coords, properties);
+	    }), options);
+	  }
 
-	    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; }
+	  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
+	   */
 
-	        var bbox = extent.bbox();
-	        bbox.segment = segment;
-	        _segmentsBBoxes[segment.id] = bbox;
-	        return bbox;
+	  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];
 
-	    function removeEntity(entity) {
-	        _rtree.remove(_bboxes[entity.id]);
-	        delete _bboxes[entity.id];
+	      if (ring.length < 4) {
+	        throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
+	      }
 
-	        if (_segmentsByWayId[entity.id]) {
-	            _segmentsByWayId[entity.id].forEach(function(segment) {
-	                _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
-	                delete _segmentsBBoxes[segment.id];
-	            });
-	            delete _segmentsByWayId[entity.id];
+	      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.");
 	        }
+	      }
 	    }
 
+	    var geom = {
+	      type: "Polygon",
+	      coordinates: coordinates
+	    };
+	    return feature(geom, properties, options);
+	  }
 
-	    function loadEntities(entities) {
-	        _rtree.load(entities.map(entityBBox));
+	  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 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)); }
+	  function polygons(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
 	    }
 
+	    return featureCollection(coordinates.map(function (coords) {
+	      return polygon(coords, properties);
+	    }), options);
+	  }
 
-	    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);
-	        });
+	  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
+	   */
 
-	        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);
-	        });
+	  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");
+	    }
 
-	    tree.rebase = function(entities, force) {
-	        var insertions = {};
-
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
-	            if (!entity.visible) { continue; }
-
-	            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, {});
-	        }
-
-	        loadEntities(Object.values(insertions));
-
-	        return tree;
+	    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 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 = {};
-
-	        if (changed.deletion) {
-	            diff.deleted().forEach(function(entity) {
-	                removeEntity(entity);
-	            });
-	        }
+	  function lineStrings(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	        if (changed.geometry) {
-	            diff.modified().forEach(function(entity) {
-	                removeEntity(entity);
-	                insertions[entity.id] = entity;
-	                updateParents(entity, insertions, {});
-	            });
-	        }
+	    return featureCollection(coordinates.map(function (coords) {
+	      return lineString(coords, properties);
+	    }), options);
+	  }
 
-	        if (changed.addition) {
-	            diff.created().forEach(function(entity) {
-	                insertions[entity.id] = entity;
-	            });
-	        }
+	  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
+	   */
 
-	        loadEntities(Object.values(insertions));
+	  function featureCollection(features, options) {
+	    if (options === void 0) {
+	      options = {};
 	    }
 
-	    // 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; });
+	    var fc = {
+	      type: "FeatureCollection"
 	    };
 
+	    if (options.id) {
+	      fc.id = options.id;
+	    }
 
-	    return tree;
-	}
-
-	function uiModal(selection, blocking) {
-	  var this$1 = this;
-
-	  var keybinding = utilKeybinding('modal');
-	  var previous = selection.select('div.modal');
-	  var animate = previous.empty();
-
-	  previous.transition()
-	    .duration(200)
-	    .style('opacity', 0)
-	    .remove();
+	    if (options.bbox) {
+	      fc.bbox = options.bbox;
+	    }
 
-	  var shaded = selection
-	    .append('div')
-	    .attr('class', 'shaded')
-	    .style('opacity', 0);
+	    fc.features = features;
+	    return fc;
+	  }
 
-	  shaded.close = function () {
-	    shaded
-	      .transition()
-	      .duration(200)
-	      .style('opacity',0)
-	      .remove();
+	  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
+	   */
 
-	    modal
-	      .transition()
-	      .duration(200)
-	      .style('top','0px');
+	  function multiLineString(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	    select(document)
-	      .call(keybinding.unbind);
-	  };
+	    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
+	   */
 
-	  var modal = shaded
-	    .append('div')
-	    .attr('class', 'modal fillL');
+	  function multiPoint(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	  if (!blocking) {
-	    shaded.on('click.remove-modal', function () {
-	      if (event.target === this$1) {
-	        shaded.close();
-	      }
-	    });
+	    var geom = {
+	      type: "MultiPoint",
+	      coordinates: coordinates
+	    };
+	    return feature(geom, properties, options);
+	  }
 
-	    modal
-	      .append('button')
-	      .attr('class', 'close')
-	      .on('click', shaded.close)
-	      .call(svgIcon('#iD-icon-close'));
+	  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
+	   *
+	   */
 
-	    keybinding
-	      .on('⌫', shaded.close)
-	      .on('⎋', shaded.close);
+	  function multiPolygon(coordinates, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	    select(document)
-	      .call(keybinding);
+	    var geom = {
+	      type: "MultiPolygon",
+	      coordinates: coordinates
+	    };
+	    return feature(geom, properties, options);
 	  }
 
-	  modal
-	    .append('div')
-	    .attr('class', 'content');
+	  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
+	   */
 
-	  if (animate) {
-	    shaded.transition().style('opacity', 1);
-	  } else {
-	    shaded.style('opacity', 1);
-	  }
+	  function geometryCollection(geometries, properties, options) {
+	    if (options === void 0) {
+	      options = {};
+	    }
 
-	  return shaded;
-	}
+	    var geom = {
+	      type: "GeometryCollection",
+	      geometries: geometries
+	    };
+	    return feature(geom, properties, options);
+	  }
 
-	function uiLoading(context) {
-	  var _modalSelection = select(null);
-	  var _message = '';
-	  var _blocking = false;
+	  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;
+	    }
 
-	  var loading = function (selection) {
-	    _modalSelection = uiModal(selection, _blocking);
+	    if (precision && !(precision >= 0)) {
+	      throw new Error("precision must be a positive number");
+	    }
 
-	    var loadertext = _modalSelection.select('.content')
-	      .classed('loading-modal', true)
-	      .append('div')
-	      .attr('class', 'modal-section fillL');
+	    var multiplier = Math.pow(10, precision || 0);
+	    return Math.round(num * multiplier) / multiplier;
+	  }
 
-	    loadertext
-	      .append('img')
-	      .attr('class', 'loader')
-	      .attr('src', context.imagePath('loader-white.gif'));
+	  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
+	   */
 
-	    loadertext
-	      .append('h3')
-	      .text(_message);
+	  function radiansToLength(radians, units) {
+	    if (units === void 0) {
+	      units = "kilometers";
+	    }
 
-	    _modalSelection.select('button.close')
-	      .attr('class', 'hide');
+	    var factor = exports.factors[units];
 
-	    return loading;
-	  };
+	    if (!factor) {
+	      throw new Error(units + " units is invalid");
+	    }
 
+	    return radians * factor;
+	  }
 
-	  loading.message = function(val) {
-	    if (!arguments.length) { return _message; }
-	    _message = val;
-	    return loading;
-	  };
+	  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";
+	    }
 
-	  loading.blocking = function(val) {
-	    if (!arguments.length) { return _blocking; }
-	    _blocking = val;
-	    return loading;
-	  };
+	    var factor = exports.factors[units];
 
+	    if (!factor) {
+	      throw new Error(units + " units is invalid");
+	    }
 
-	  loading.close = function () {
-	    _modalSelection.remove();
-	  };
+	    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
+	   */
 
-	  loading.isShown = function () {
-	    return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
-	  };
+	  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
+	   */
 
-	  return loading;
-	}
+	  function bearingToAzimuth(bearing) {
+	    var angle = bearing % 360;
 
-	function coreHistory(context) {
-	    var dispatch$1 = dispatch('change', 'merge', 'restore', 'undone', 'redone');
-	    var lock = utilSessionMutex('lock');
+	    if (angle < 0) {
+	      angle += 360;
+	    }
 
-	    // restorable if iD not open in another window/tab and a saved history exists in localStorage
-	    var _hasUnresolvedRestorableChanges = lock.lock() && !!corePreferences(getKey('saved_history'));
+	    return angle;
+	  }
 
-	    var duration = 150;
-	    var _imageryUsed = [];
-	    var _photoOverlaysUsed = [];
-	    var _checkpoints = {};
-	    var _pausedGraph;
-	    var _stack;
-	    var _index;
-	    var _tree;
+	  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;
+	  }
 
-	    // internal _act, accepts list of actions and eased time
-	    function _act(actions, t) {
-	        actions = Array.prototype.slice.call(actions);
+	  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 annotation;
-	        if (typeof actions[actions.length - 1] !== 'function') {
-	            annotation = actions.pop();
-	        }
+	  function degreesToRadians(degrees) {
+	    var radians = degrees % 360;
+	    return radians * Math.PI / 180;
+	  }
 
-	        var graph = _stack[_index].graph;
-	        for (var i = 0; i < actions.length; i++) {
-	            graph = actions[i](graph, t);
-	        }
+	  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
+	   */
 
-	        return {
-	            graph: graph,
-	            annotation: annotation,
-	            imageryUsed: _imageryUsed,
-	            photoOverlaysUsed: _photoOverlaysUsed,
-	            transform: context.projection.transform(),
-	            selectedIDs: context.selectedIDs()
-	        };
+	  function convertLength(length, originalUnit, finalUnit) {
+	    if (originalUnit === void 0) {
+	      originalUnit = "kilometers";
 	    }
 
-
-	    // 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);
+	    if (finalUnit === void 0) {
+	      finalUnit = "kilometers";
 	    }
 
-
-	    // 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);
+	    if (!(length >= 0)) {
+	      throw new Error("length must be a positive number");
 	    }
 
+	    return radiansToLength(lengthToRadians(length, originalUnit), finalUnit);
+	  }
 
-	    // internal _overwrite with eased time
-	    function _overwrite(args, t) {
-	        var previous = _stack[_index].graph;
-	        if (_index > 0) {
-	            _index--;
-	            _stack.pop();
-	        }
-	        _stack = _stack.slice(0, _index + 1);
-	        var actionResult = _act(args, t);
-	        _stack.push(actionResult);
-	        _index++;
-	        return change(previous);
-	    }
-
+	  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
+	   */
 
-	    // determine difference and dispatch a change event
-	    function change(previous) {
-	        var difference = coreDifference(previous, history.graph());
-	        if (!_pausedGraph) {
-	            dispatch$1.call('change', this, difference);
-	        }
-	        return difference;
+	  function convertArea(area, originalUnit, finalUnit) {
+	    if (originalUnit === void 0) {
+	      originalUnit = "meters";
 	    }
 
-
-	    // iD uses namespaced keys so multiple installations do not conflict
-	    function getKey(n) {
-	        return 'iD_' + window.location.origin + '_' + n;
+	    if (finalUnit === void 0) {
+	      finalUnit = "kilometers";
 	    }
 
+	    if (!(area >= 0)) {
+	      throw new Error("area must be a positive number");
+	    }
 
-	    var history = {
-
-	        graph: function() {
-	            return _stack[_index].graph;
-	        },
-
-
-	        tree: function() {
-	            return _tree;
-	        },
-
-
-	        base: function() {
-	            return _stack[0].graph;
-	        },
-
-
-	        merge: function(entities/*, extent*/) {
-	            var stack = _stack.map(function(state) { return state.graph; });
-	            _stack[0].graph.rebase(entities, stack, false);
-	            _tree.rebase(entities, false);
-
-	            dispatch$1.call('merge', this, entities);
-	        },
-
-
-	        perform: function() {
-	            // 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;
-	            }
-
-	            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() {
-	            select(document).interrupt('history.perform');
-	            return _replace(arguments, 1);
-	        },
-
-
-	        // Same as calling pop and then perform
-	        overwrite: function() {
-	            select(document).interrupt('history.perform');
-	            return _overwrite(arguments, 1);
-	        },
-
-
-	        pop: function(n) {
-	            select(document).interrupt('history.perform');
-
-	            var previous = _stack[_index].graph;
-	            if (isNaN(+n) || +n < 0) {
-	                n = 1;
-	            }
-	            while (n-- > 0 && _index > 0) {
-	                _index--;
-	                _stack.pop();
-	            }
-	            return change(previous);
-	        },
-
-
-	        // Back to the previous annotated state or _index = 0.
-	        undo: function() {
-	            select(document).interrupt('history.perform');
-
-	            var previousStack = _stack[_index];
-	            var previous = previousStack.graph;
-	            while (_index > 0) {
-	                _index--;
-	                if (_stack[_index].annotation) { break; }
-	            }
-
-	            dispatch$1.call('undone', this, _stack[_index], previousStack);
-	            return change(previous);
-	        },
-
-
-	        // Forward to the next annotated state.
-	        redo: function() {
-	            select(document).interrupt('history.perform');
-
-	            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;
-	                }
-	            }
-
-	            return change(previous);
-	        },
-
-
-	        pauseChangeDispatch: function() {
-	            if (!_pausedGraph) {
-	                _pausedGraph = _stack[_index].graph;
-	            }
-	        },
-
-
-	        resumeChangeDispatch: function() {
-	            if (_pausedGraph) {
-	                var previous = _pausedGraph;
-	                _pausedGraph = null;
-	                return change(previous);
-	            }
-	        },
+	    var startFactor = exports.areaFactors[originalUnit];
 
+	    if (!startFactor) {
+	      throw new Error("invalid original units");
+	    }
 
-	        undoAnnotation: function() {
-	            var i = _index;
-	            while (i >= 0) {
-	                if (_stack[i].annotation) { return _stack[i].annotation; }
-	                i--;
-	            }
-	        },
+	    var finalFactor = exports.areaFactors[finalUnit];
 
+	    if (!finalFactor) {
+	      throw new Error("invalid final units");
+	    }
 
-	        redoAnnotation: function() {
-	            var i = _index + 1;
-	            while (i <= _stack.length - 1) {
-	                if (_stack[i].annotation) { return _stack[i].annotation; }
-	                i++;
-	            }
-	        },
+	    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
+	   */
 
-	        // Returns the entities from the active graph with bounding boxes
-	        // overlapping the given `extent`.
-	        intersects: function(extent) {
-	            return _tree.intersects(extent, _stack[_index].graph);
-	        },
+	  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
+	   */
 
-	        difference: function() {
-	            var base = _stack[0].graph;
-	            var head = _stack[_index].graph;
-	            return coreDifference(base, head);
-	        },
+	  function isObject(input) {
+	    return !!input && input.constructor === Object;
+	  }
 
+	  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
+	   */
 
-	        changes: function(action) {
-	            var base = _stack[0].graph;
-	            var head = _stack[_index].graph;
+	  function validateBBox(bbox) {
+	    if (!bbox) {
+	      throw new Error("bbox is required");
+	    }
 
-	            if (action) {
-	                head = action(head);
-	            }
+	    if (!Array.isArray(bbox)) {
+	      throw new Error("bbox must be an Array");
+	    }
 
-	            var difference = coreDifference(base, head);
+	    if (bbox.length !== 4 && bbox.length !== 6) {
+	      throw new Error("bbox must be an Array of 4 or 6 numbers");
+	    }
 
-	            return {
-	                modified: difference.modified(),
-	                created: difference.created(),
-	                deleted: difference.deleted()
-	            };
-	        },
+	    bbox.forEach(function (num) {
+	      if (!isNumber(num)) {
+	        throw new Error("bbox must only contain numbers");
+	      }
+	    });
+	  }
 
+	  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
+	   */
 
-	        hasChanges: function() {
-	            return this.difference().length() > 0;
-	        },
+	  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");
+	    }
+	  }
 
-	        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);
-	            }
-	        },
+	  exports.validateId = validateId; // Deprecated methods
 
+	  function radians2degrees() {
+	    throw new Error("method has been renamed to `radiansToDegrees`");
+	  }
 
-	        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);
-	            }
-	        },
+	  exports.radians2degrees = radians2degrees;
 
+	  function degrees2radians() {
+	    throw new Error("method has been renamed to `degreesToRadians`");
+	  }
 
-	        // save the current history state
-	        checkpoint: function(key) {
-	            _checkpoints[key] = {
-	                stack: _stack,
-	                index: _index
-	            };
-	            return history;
-	        },
+	  exports.degrees2radians = degrees2radians;
 
+	  function distanceToDegrees() {
+	    throw new Error("method has been renamed to `lengthToDegrees`");
+	  }
 
-	        // 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;
-	        },
+	  exports.distanceToDegrees = distanceToDegrees;
 
+	  function distanceToRadians() {
+	    throw new Error("method has been renamed to `lengthToRadians`");
+	  }
 
-	        // `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;
-	            });
+	  exports.distanceToRadians = distanceToRadians;
 
-	            // 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 radiansToDistance() {
+	    throw new Error("method has been renamed to `radiansToLength`");
+	  }
 
-	            // 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;
-	                    });
-	                }
-	            });
+	  exports.radiansToDistance = radiansToDistance;
 
-	            return JSON.stringify({ dataIntroGraph: baseEntities });
+	  function bearingToAngle() {
+	    throw new Error("method has been renamed to `bearingToAzimuth`");
+	  }
 
+	  exports.bearingToAngle = bearingToAngle;
 
-	            function copyIntroEntity(source) {
-	                var copy = utilObjectOmit(source, ['type', 'user', 'v', 'version', 'visible']);
+	  function convertDistance() {
+	    throw new Error("method has been renamed to `convertLength`");
+	  }
 
-	                // Note: the copy is no longer an osmEntity, so it might not have `tags`
-	                if (copy.tags && !Object.keys(copy.tags)) {
-	                    delete copy.tags;
-	                }
+	  exports.convertDistance = convertDistance;
+	});
 
-	                if (Array.isArray(copy.loc)) {
-	                    copy.loc[0] = +copy.loc[0].toFixed(6);
-	                    copy.loc[1] = +copy.loc[1].toFixed(6);
-	                }
+	var invariant = createCommonjsModule(function (module, exports) {
 
-	                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));
+	  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]
+	   */
 
-	                    copy.id = permIDs[source.id] = permID;
-	                }
-	                return copy;
-	            }
-	        },
+	  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;
+	      }
 
-	        toJSON: function() {
-	            if (!this.hasChanges()) { return; }
+	      if (coord.type === "Point") {
+	        return coord.coordinates;
+	      }
+	    }
 
-	            var allEntities = {};
-	            var baseEntities = {};
-	            var base = _stack[0];
+	    if (Array.isArray(coord) && coord.length >= 2 && !Array.isArray(coord[0]) && !Array.isArray(coord[1])) {
+	      return coord;
+	    }
 
-	            var s = _stack.map(function(i) {
-	                var modified = [];
-	                var deleted = [];
+	    throw new Error("coord must be GeoJSON Point or an Array of numbers");
+	  }
 
-	                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);
-	                    }
+	  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]]]
+	   */
 
-	                    // 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];
-	                            }
-	                        });
-	                    }
-	                });
+	  function getCoords(coords) {
+	    if (Array.isArray(coords)) {
+	      return coords;
+	    } // Feature
 
-	                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; }
+	    if (coords.type === "Feature") {
+	      if (coords.geometry !== null) {
+	        return coords.geometry.coordinates;
+	      }
+	    } else {
+	      // Geometry
+	      if (coords.coordinates) {
+	        return coords.coordinates;
+	      }
+	    }
 
-	                return x;
-	            });
+	    throw new Error("coords must be GeoJSON Feature, Geometry Object or an Array");
+	  }
 
-	            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()
-	            });
-	        },
+	  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;
+	    }
 
-	        fromJSON: function(json, loadChildNodes) {
-	            var h = JSON.parse(json);
-	            var loadComplete = true;
+	    if (Array.isArray(coordinates[0]) && coordinates[0].length) {
+	      return containsNumber(coordinates[0]);
+	    }
 
-	            osmEntity.id.next = h.nextIDs;
-	            _index = h.index;
+	    throw new Error("coordinates must only contain numbers");
+	  }
 
-	            if (h.version === 2 || h.version === 3) {
-	                var allEntities = {};
+	  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.
+	   */
 
-	                h.entities.forEach(function(entity) {
-	                    allEntities[osmEntity.key(entity)] = osmEntity(entity);
-	                });
+	  function geojsonType(value, type, name) {
+	    if (!type || !name) {
+	      throw new Error("type and name required");
+	    }
 
-	                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);
-	                        }
-	                    }
-	                }
+	    if (!value || value.type !== type) {
+	      throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + value.type);
+	    }
+	  }
 
-	                _stack = h.stack.map(function(d) {
-	                    var entities = {}, entity;
+	  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.
+	   */
 
-	                    if (d.modified) {
-	                        d.modified.forEach(function(key) {
-	                            entity = allEntities[key];
-	                            entities[entity.id] = entity;
-	                        });
-	                    }
+	  function featureOf(feature, type, name) {
+	    if (!feature) {
+	      throw new Error("No feature passed");
+	    }
 
-	                    if (d.deleted) {
-	                        d.deleted.forEach(function(id) {
-	                            entities[id] = undefined;
-	                        });
-	                    }
+	    if (!name) {
+	      throw new Error(".featureOf() requires a name");
+	    }
 
-	                    return {
-	                        graph: coreGraph(_stack[0].graph).load(entities),
-	                        annotation: d.annotation,
-	                        imageryUsed: d.imageryUsed,
-	                        photoOverlaysUsed: d.photoOverlaysUsed,
-	                        transform: d.transform,
-	                        selectedIDs: d.selectedIDs
-	                    };
-	                });
+	    if (!feature || feature.type !== "Feature" || !feature.geometry) {
+	      throw new Error("Invalid input to " + name + ", Feature with geometry required");
+	    }
 
-	            } else { // original version
-	                _stack = h.stack.map(function(d) {
-	                    var entities = {};
+	    if (!feature.geometry || feature.geometry.type !== type) {
+	      throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
+	    }
+	  }
 
-	                    for (var i in d.entities) {
-	                        var entity = d.entities[i];
-	                        entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
-	                    }
+	  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.
+	   */
 
-	                    d.graph = coreGraph(_stack[0].graph).load(entities);
-	                    return d;
-	                });
-	            }
+	  function collectionOf(featureCollection, type, name) {
+	    if (!featureCollection) {
+	      throw new Error("No featureCollection passed");
+	    }
 
-	            var transform = _stack[_index].transform;
-	            if (transform) {
-	                context.map().transformEase(transform, 0);   // 0 = immediate, no easing
-	            }
+	    if (!name) {
+	      throw new Error(".collectionOf() requires a name");
+	    }
 
-	            if (loadComplete) {
-	                dispatch$1.call('change');
-	                dispatch$1.call('restore', this);
-	            }
+	    if (!featureCollection || featureCollection.type !== "FeatureCollection") {
+	      throw new Error("Invalid input to " + name + ", FeatureCollection required");
+	    }
 
-	            return history;
-	        },
+	    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");
+	      }
 
-	        lock: function() {
-	            return lock.lock();
-	        },
+	      if (!feature.geometry || feature.geometry.type !== type) {
+	        throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
+	      }
+	    }
+	  }
 
+	  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]}
+	   */
 
-	        unlock: function() {
-	            lock.unlock();
-	        },
+	  function getGeom(geojson) {
+	    if (geojson.type === "Feature") {
+	      return geojson.geometry;
+	    }
 
+	    return geojson;
+	  }
 
-	        save: function() {
-	            if (lock.locked() &&
-	                // don't overwrite existing, unresolved changes
-	                !_hasUnresolvedRestorableChanges) {
+	  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"
+	   */
 
-	                corePreferences(getKey('saved_history'), history.toJSON() || null);
-	            }
-	            return history;
-	        },
+	  function getType(geojson, name) {
+	    if (geojson.type === "FeatureCollection") {
+	      return "FeatureCollection";
+	    }
 
+	    if (geojson.type === "GeometryCollection") {
+	      return "GeometryCollection";
+	    }
 
-	        // delete the history version saved in localStorage
-	        clearSaved: function() {
-	            context.debouncedSave.cancel();
-	            if (lock.locked()) {
-	                _hasUnresolvedRestorableChanges = false;
-	                corePreferences(getKey('saved_history'), null);
+	    if (geojson.type === "Feature" && geojson.geometry !== null) {
+	      return geojson.geometry.type;
+	    }
 
-	                // clear the changeset metadata associated with the saved history
-	                corePreferences('comment', null);
-	                corePreferences('hashtags', null);
-	                corePreferences('source', null);
-	            }
-	            return history;
-	        },
+	    return geojson.type;
+	  }
 
+	  exports.getType = getType;
+	});
 
-	        savedHistoryJSON: function() {
-	            return corePreferences(getKey('saved_history'));
-	        },
+	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
 
+	function lineclip(points, bbox, result) {
+	  var len = points.length,
+	      codeA = bitCode(points[0], bbox),
+	      part = [],
+	      i,
+	      a,
+	      b,
+	      codeB,
+	      lastCode;
+	  if (!result) result = [];
 
-	        hasRestorableChanges: function() {
-	            return _hasUnresolvedRestorableChanges;
-	        },
+	  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);
+	        }
 
-	        // 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); }
-	            }
-	        },
+	        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);
+	      }
+	    }
 
+	    codeA = lastCode;
+	  }
 
-	        _getKey: getKey
+	  if (part.length) result.push(part);
+	  return result;
+	} // Sutherland-Hodgeman polygon clipping algorithm
 
-	    };
 
+	function polygonclip(points, bbox) {
+	  var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
-	    history.reset();
+	  for (edge = 1; edge <= 8; edge *= 2) {
+	    result = [];
+	    prev = points[points.length - 1];
+	    prevInside = !(bitCode(prev, bbox) & edge);
 
-	    return utilRebind(history, dispatch$1, 'on');
-	}
+	    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
 
-	/**
-	 * 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);
+	      if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
+	      if (inside) result.push(p); // add a point if it's inside
 
-	  function isHighway(entity) {
-	    return entity.type === 'way'
-	      && osmRoutableHighwayTagValues[entity.tags.highway];
-	  }
+	      prev = p;
+	      prevInside = inside;
+	    }
 
-	  function isTaggedAsNotContinuing(node) {
-	    return node.tags.noexit === 'yes'
-	      || node.tags.amenity === 'parking_entrance'
-	      || (node.tags.entrance && node.tags.entrance !== 'no');
+	    points = result;
+	    if (!points.length) break;
 	  }
 
+	  return result;
+	} // intersect a segment against one of the 4 lines that make up the bbox
 
-	  var validation = function checkAlmostJunction(entity, graph) {
-	    if (!isHighway(entity)) { return []; }
-	    if (entity.isDegenerate()) { return []; }
 
-	    var tree = context.history().tree();
-	    var extendableNodeInfos = findConnectableEndNodesByExtension(entity);
+	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
 
-	    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]);
-	          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
-	      }));
-	    });
+	function bitCode(p, bbox) {
+	  var code = 0;
+	  if (p[0] < bbox[0]) code |= 1; // left
+	  else if (p[0] > bbox[2]) code |= 2; // right
 
-	    return issues;
+	  if (p[1] < bbox[1]) code |= 4; // bottom
+	  else if (p[1] > bbox[3]) code |= 8; // top
 
-	    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);
+	  return code;
+	}
+	lineclip_1["default"] = _default;
 
-	          // 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;
-	            }
-	          }
+	var bboxClip_1 = createCommonjsModule(function (module, exports) {
 
-	          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);
+	  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;
+	  };
 
-	          // 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
-	            );
-	          }
-	        }
-	      })];
+	  Object.defineProperty(exports, "__esModule", {
+	    value: true
+	  });
 
-	      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')
-	            );
-	          }
-	        }));
-	      }
+	  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]
+	   */
 
-	      return fixes;
-	    }
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.almost_junction.highway-highway.reference'));
-	    }
+	  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 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;
-	      }
+	    switch (type) {
+	      case "LineString":
+	      case "MultiLineString":
+	        var lines_1 = [];
 
-	      var occurences = 0;
-	      for (var index in way.nodes) {
-	        if (way.nodes[index] === node.id) {
-	          occurences += 1;
-	          if (occurences > 1) {
-	            return false;
-	          }
+	        if (type === "LineString") {
+	          coords = [coords];
 	        }
-	      }
-	      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; }
+	        coords.forEach(function (line) {
+	          lineclip.polyline(line, bbox, lines_1);
+	        });
 
-	        var connectionInfo = canConnectByExtend(way, nodeIndex);
-	        if (!connectionInfo) { return; }
+	        if (lines_1.length === 1) {
+	          return helpers$1.lineString(lines_1[0], properties);
+	        }
 
-	        testNodes = graph.childNodes(way).slice();   // shallow copy
-	        testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc);
+	        return helpers$1.multiLineString(lines_1, properties);
 
-	        // don't flag issue if connecting the ways would cause self-intersection
-	        if (geoHasSelfIntersections(testNodes, nodeID)) { return; }
+	      case "Polygon":
+	        return helpers$1.polygon(clipPolygon(coords, bbox), properties);
 
-	        results.push(connectionInfo);
-	      });
+	      case "MultiPolygon":
+	        return helpers$1.multiPolygon(coords.map(function (poly) {
+	          return clipPolygon(poly, bbox);
+	        }), properties);
 
-	      return results;
+	      default:
+	        throw new Error("geometry " + type + " not supported");
 	    }
+	  }
 
-	    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;
-	      });
-	    }
+	  exports["default"] = bboxClip;
 
-	    function findSmallJoinAngle(midNode, tipNode, endNodes) {
-	      // Both nodes could be close, so want to join whichever is closest to collinear
-	      var joinTo;
-	      var minAngle = Infinity;
+	  function clipPolygon(rings, bbox) {
+	    var outRings = [];
 
-	      // 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);
+	    for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
+	      var ring = rings_1[_i];
+	      var clipped = lineclip.polygon(ring, bbox);
 
-	        if (diff < minAngle) {
-	          joinTo = endNode;
-	          minAngle = diff;
+	      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]);
 	        }
-	      });
-
-	      /* Threshold set by considering right angle triangle
-	      based on node joining threshold and extension distance */
-	      if (minAngle <= SIG_ANGLE_TH) { return joinTo; }
 
-	      return null;
+	        if (clipped.length >= 4) {
+	          outRings.push(clipped);
+	        }
+	      }
 	    }
 
-	    function hasTag(tags, key) {
-	      return tags[key] !== undefined && tags[key] !== 'no';
-	    }
+	    return outRings;
+	  }
+	});
+	var turf_bboxClip = /*@__PURE__*/getDefaultExportFromCjs(bboxClip_1);
 
-	    function canConnectWays(way, way2) {
+	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;
 
-	      // allow self-connections
-	      if (way.id === way2.id) { return true; }
+	  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);
 
-	      // 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; }
+	  var seen = [];
+	  return function stringify(node) {
+	    if (node && node.toJSON && typeof node.toJSON === 'function') {
+	      node = node.toJSON();
+	    }
 
-	      // must have equivalent layers and levels
-	      var layer1 = way.tags.layer || '0',
-	        layer2 = way2.tags.layer || '0';
-	      if (layer1 !== layer2) { return false; }
+	    if (node === undefined) return;
+	    if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
+	    if (_typeof(node) !== 'object') return JSON.stringify(node);
+	    var i, out;
 
-	      var level1 = way.tags.level || '0',
-	        level2 = way2.tags.level || '0';
-	      if (level1 !== level2) { return false; }
+	    if (Array.isArray(node)) {
+	      out = '[';
 
-	      return true;
-	    }
+	      for (i = 0; i < node.length; i++) {
+	        if (i) out += ',';
+	        out += stringify(node[i]) || 'null';
+	      }
 
-	    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]
-	      ]);
+	      return out + ']';
+	    }
 
-	      // 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);
+	    if (node === null) return 'null';
 
-	      // 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];
+	    if (seen.indexOf(node) !== -1) {
+	      if (cycles) return JSON.stringify('__cycle__');
+	      throw new TypeError('Converting circular structure to JSON');
+	    }
 
-	        var way2 = graph.entity(segmentInfo.wayId);
+	    var seenIndex = seen.push(node) - 1;
+	    var keys = Object.keys(node).sort(cmp && cmp(node));
+	    out = '';
 
-	        if (!isHighway(way2)) { continue; }
+	    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;
+	    }
 
-	        if (!canConnectWays(way, way2)) { continue; }
+	    seen.splice(seenIndex, 1);
+	    return '{' + out + '}';
+	  }(data);
+	};
 
-	        var nAid = segmentInfo.nodes[0],
-	          nBid = segmentInfo.nodes[1];
+	function DEFAULT_COMPARE(a, b) {
+	  return a > b ? 1 : a < b ? -1 : 0;
+	}
 
-	        if (nAid === tipNid || nBid === tipNid) { continue; }
+	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;
 
-	        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
-	          };
-	        }
-	      }
-	      return null;
-	    }
-	  };
+	    _classCallCheck(this, SplayTree);
 
-	  validation.type = type;
+	    this._compare = compare;
+	    this._root = null;
+	    this._size = 0;
+	    this._noDuplicates = !!noDuplicates;
+	  }
 
-	  return validation;
-	}
+	  _createClass(SplayTree, [{
+	    key: "rotateLeft",
+	    value: function rotateLeft(x) {
+	      var y = x.right;
 
-	function validationCloseNodes(context) {
-	    var type = 'close_nodes';
+	      if (y) {
+	        x.right = y.left;
+	        if (y.left) y.left.parent = x;
+	        y.parent = x.parent;
+	      }
 
-	    var pointThresholdMeters = 0.2;
+	      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 validation = function(entity, graph) {
-	        if (entity.type === 'node') {
-	            return getIssuesForNode(entity);
-	        } else if (entity.type === 'way') {
-	            return getIssuesForWay(entity);
+	      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);
 	        }
-	        return [];
-
-	        function getIssuesForNode(node) {
-	            var parentWays = graph.parentWays(node);
-	            if (parentWays.length) {
-	                return getIssuesForVertex(node, parentWays);
-	            } else {
-	                return getIssuesForDetachedPoint(node);
-	            }
+	      }
+	    }
+	  }, {
+	    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;
 	        }
 
-	        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'; }
+	        l = x.left;
+	        r = x.right;
 
-	            var parentRelations = graph.parentRelations(way);
-	            for (var i in parentRelations) {
-	                var relation = parentRelations[i];
+	        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 (relation.tags.type === 'boundary') { return 'boundary'; }
+	              p.right = gp;
+	              gp.parent = p;
+	            } else {
+	              /* zig-zag */
+	              if (l) {
+	                gp.right = l;
+	                l.parent = gp;
+	              } else gp.right = null;
 
-	                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'; }
-	                }
+	              x.left = gp;
+	              gp.parent = x;
 	            }
+	          }
 
-	            return 'other';
-	        }
+	          if (r) {
+	            p.left = r;
+	            r.parent = p;
+	          } else p.left = null;
 
-	        function shouldCheckWay(way) {
+	          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;
 
-	            // don't flag issues where merging would create degenerate ways
-	            if (way.nodes.length <= 2 ||
-	                (way.isClosed() && way.nodes.length <= 4)) { return false; }
+	              x.right = gp;
+	              gp.parent = x;
+	            }
+	          }
 
-	            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 (l) {
+	            p.right = l;
+	            l.parent = p;
+	          } else p.right = null;
 
-	            return true;
+	          x.left = p;
+	          p.parent = x;
+	        }
+	      }
+	    }
+	  }, {
+	    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;
 	        }
+	      }
 
-	        function getIssuesForWay(way) {
-	            if (!shouldCheckWay(way)) { return []; }
+	      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;
+	      }
 
-	            var issues = [],
-	                nodes = graph.childNodes(way);
-	            for (var i = 0; i < nodes.length - 1; i++) {
-	                var node1 = nodes[i];
-	                var node2 = nodes[i+1];
+	      return null;
+	    }
+	    /**
+	     * Whether the tree contains a node with the given key
+	     * @param  {Key} key
+	     * @return {boolean} true/false
+	     */
 
-	                var issue = getWayIssueIfAny(node1, node2, way);
-	                if (issue) { issues.push(issue); }
-	            }
-	            return issues;
-	        }
+	  }, {
+	    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 getIssuesForVertex(node, parentWays) {
-	            var issues = [];
+	      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;
+	      }
 
-	            function checkForCloseness(node1, node2, way) {
-	                var issue = getWayIssueIfAny(node1, node2, way);
-	                if (issue) { issues.push(issue); }
-	            }
+	      if (t) {
+	        if (s) sMax.right = t;else this._root = t;
+	        t.parent = sMax;
+	      }
 
-	            for (var i = 0; i < parentWays.length; i++) {
-	                var parentWay = parentWays[i];
+	      this._size--;
+	    }
+	    /**
+	     * Removes and returns the node with smallest key
+	     * @return {?Node}
+	     */
 
-	                if (!shouldCheckWay(parentWay)) { continue; }
+	  }, {
+	    key: "pop",
+	    value: function pop() {
+	      var node = this._root,
+	          returnValue = null;
 
-	                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;
+	      if (node) {
+	        while (node.left) {
+	          node = node.left;
 	        }
 
-	        function thresholdMetersForWay(way) {
-	            if (!shouldCheckWay(way)) { return 0; }
+	        returnValue = {
+	          key: node.key,
+	          data: node.data
+	        };
+	        this.remove(node.key);
+	      }
 
-	            var wayType = wayTypeFor(way);
+	      return returnValue;
+	    }
+	    /* eslint-disable class-methods-use-this */
 
-	            // 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;
-	        }
+	    /**
+	     * Successor node
+	     * @param  {Node} node
+	     * @return {?Node}
+	     */
 
-	        function getIssuesForDetachedPoint(node) {
+	  }, {
+	    key: "next",
+	    value: function next(node) {
+	      var successor = node;
 
-	            var issues = [];
+	      if (successor) {
+	        if (successor.right) {
+	          successor = successor.right;
 
-	            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]
-	            ]);
+	          while (successor && successor.left) {
+	            successor = successor.left;
+	          }
+	        } else {
+	          successor = node.parent;
 
-	            var intersected = context.history().tree().intersects(queryExtent, graph);
-	            for (var j = 0; j < intersected.length; j++) {
-	                var nearby = intersected[j];
+	          while (successor && successor.right === node) {
+	            node = successor;
+	            successor = successor.parent;
+	          }
+	        }
+	      }
 
-	                if (nearby.id === node.id) { continue; }
-	                if (nearby.type !== 'node' || nearby.geometry(graph) !== 'point') { continue; }
+	      return successor;
+	    }
+	    /**
+	     * Predecessor node
+	     * @param  {Node} node
+	     * @return {?Node}
+	     */
 
-	                if (nearby.loc === node.loc ||
-	                    geoSphericalDistance(node.loc, nearby.loc) < pointThresholdMeters) {
+	  }, {
+	    key: "prev",
+	    value: function prev(node) {
+	      var predecessor = node;
 
-	                    // 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')
-	                                })
-	                            ];
-	                        }
-	                    }));
-	                }
-	            }
+	      if (predecessor) {
+	        if (predecessor.left) {
+	          predecessor = predecessor.left;
 
-	            return issues;
+	          while (predecessor && predecessor.right) {
+	            predecessor = predecessor.right;
+	          }
+	        } else {
+	          predecessor = node.parent;
 
-	            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);
-	            }
+	          while (predecessor && predecessor.left === node) {
+	            node = predecessor;
+	            predecessor = predecessor.parent;
+	          }
 	        }
+	      }
 
-	        function getWayIssueIfAny(node1, node2, way) {
-	            if (node1.id === node2.id ||
-	                (node1.hasInterestingTags() && node2.hasInterestingTags())) {
-	                return null;
-	            }
+	      return predecessor;
+	    }
+	    /* eslint-enable class-methods-use-this */
 
-	            if (node1.loc !== node2.loc) {
-	                var parentWays1 = graph.parentWays(node1);
-	                var parentWays2 = new Set(graph.parentWays(node2));
+	    /**
+	     * @param  {forEachCallback} callback
+	     * @return {SplayTree}
+	     */
 
-	                var sharedWays = parentWays1.filter(function(parentWay) {
-	                    return parentWays2.has(parentWay);
-	                });
+	  }, {
+	    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
 
-	                var thresholds = sharedWays.map(function(parentWay) {
-	                    return thresholdMetersForWay(parentWay);
-	                });
+	            current = current.right;
+	          } else done = true;
+	        }
+	      }
 
-	                var threshold = Math.min.apply(Math, thresholds);
-	                var distance = geoSphericalDistance(node1.loc, node2.loc);
-	                if (distance > threshold) { return null; }
-	            }
+	      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}
+	     */
 
-	            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')
-	                        })
-	                    ];
-	                }
-	            });
+	  }, {
+	    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);
 
-	            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 (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;
+	        }
+	      }
 
+	      return this;
+	    }
+	    /**
+	     * Returns all keys in order
+	     * @return {Array<Key>}
+	     */
 
-	    validation.type = type;
+	  }, {
+	    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;
+	        }
+	      }
 
-	    return validation;
-	}
+	      return r;
+	    }
+	    /**
+	     * Returns `data` fields of all nodes in order.
+	     * @return {Array<Value>}
+	     */
 
-	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;
-	                }
-	            }
+	  }, {
+	    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;
 	        }
-	        return way;
+	      }
+
+	      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;
+	        }
+	      }
 
-	    function hasTag(tags, key) {
-	        return tags[key] !== undefined && tags[key] !== 'no';
+	      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 taggedAsIndoor(tags) {
-	        return hasTag(tags, 'indoor') ||
-	            hasTag(tags, 'level') ||
-	            tags.highway === 'corridor';
+	  }, {
+	    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;
 	    }
-
-	    function allowsBridge(featureType) {
-	        return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+	  }, {
+	    key: "min",
+	    value: function min() {
+	      var node = this.minNode(this._root);
+	      if (node) return node.key;else return null;
 	    }
-	    function allowsTunnel(featureType) {
-	        return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+	  }, {
+	    key: "max",
+	    value: function max() {
+	      var node = this.maxNode(this._root);
+	      if (node) return node.key;else return null;
 	    }
-
-
-	    function getFeatureTypeForCrossingCheck(way, graph) {
-	        var feature = getFeatureWithFeatureTypeTagsForWay(way, graph);
-	        return getFeatureType(feature, graph);
+	  }, {
+	    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}
+	     */
 
-	    // discard
-	    var ignoredBuildings = {
-	        demolished: true, dismantled: true, proposed: true, razed: true
-	    };
-
-
-	    function getFeatureType(entity, graph) {
+	  }], [{
+	    key: "createTree",
+	    value: function createTree(keys, values, comparator, presort, noDuplicates) {
+	      return new SplayTree(comparator, noDuplicates).load(keys, values, presort);
+	    }
+	  }]);
 
-	        var geometry = entity.geometry(graph);
-	        if (geometry !== 'line' && geometry !== 'area') { return null; }
+	  return SplayTree;
+	}();
 
-	        var tags = entity.tags;
+	function loadRecursive(parent, keys, values, start, end) {
+	  var size = end - start;
 
-	        if (hasTag(tags, 'building') && !ignoredBuildings[tags.building]) { return 'building'; }
-	        if (hasTag(tags, 'highway') && osmRoutableHighwayTagValues[tags.highway]) { return 'highway'; }
+	  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;
+	  }
 
-	        // don't check railway or waterway areas
-	        if (geometry !== 'line') { return null; }
+	  return null;
+	}
 
-	        if (hasTag(tags, 'railway') && osmRailwayTrackTagValues[tags.railway]) { return 'railway'; }
-	        if (hasTag(tags, 'waterway') && osmFlowingWaterwayTagValues[tags.waterway]) { return 'waterway'; }
+	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 null;
-	    }
+	  while (true) {
+	    do {
+	      i++;
+	    } while (compare(keys[i], pivot) < 0);
 
+	    do {
+	      j--;
+	    } while (compare(keys[j], pivot) > 0);
 
-	    function isLegitCrossing(way1, featureType1, way2, featureType2) {
-	        var tags1 = way1.tags;
-	        var tags2 = way2.tags;
+	    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;
+	  }
 
-	        // assume 0 by default
-	        var level1 = tags1.level || '0';
-	        var level2 = tags2.level || '0';
+	  sort(keys, values, left, j, compare);
+	  sort(keys, values, j + 1, right, compare);
+	}
 
-	        if (taggedAsIndoor(tags1) && taggedAsIndoor(tags2) && level1 !== level2) {
-	            // assume features don't interact if they're indoor on different levels
-	            return true;
-	        }
+	var NORMAL = 0;
+	var NON_CONTRIBUTING = 1;
+	var SAME_TRANSITION = 2;
+	var DIFFERENT_TRANSITION = 3;
 
-	        // 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 INTERSECTION = 0;
+	var UNION = 1;
+	var DIFFERENCE = 2;
+	var XOR = 3;
 
-	        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; }
+	/**
+	 * @param  {SweepEvent} event
+	 * @param  {SweepEvent} prev
+	 * @param  {Operation} operation
+	 */
 
-	        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 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
 
-	        // 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; }
 
-	        if (featureType1 === 'building' || featureType2 === 'building') {
-	            // for building crossings, different layers are enough
-	            if (layer1 !== layer2) { return true; }
-	        }
-	        return false;
+	    if (prev) {
+	      event.prevInResult = !inResult(prev, operation) || prev.isVertical() ? prev.prevInResult : prev;
 	    }
+	  } // check if the line segment belongs to the Boolean operation
 
 
-	    // 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 {}; }
+	  var isInResult = inResult(event, operation);
 
-	        } 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' } : {};
-	                    }
-	                }
+	  if (isInResult) {
+	    event.resultTransition = determineResultTransition(event, operation);
+	  } else {
+	    event.resultTransition = 0;
+	  }
+	}
+	/* eslint-disable indent */
 
-	                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; }
+	function inResult(event, operation) {
+	  switch (event.type) {
+	    case NORMAL:
+	      switch (operation) {
+	        case INTERSECTION:
+	          return !event.otherInOut;
 
-	                    if (highwaysDisallowingFords[entity1.tags.highway] ||
-	                        highwaysDisallowingFords[entity2.tags.highway]) {
-	                        // do not allow fords on major highways
-	                        return null;
-	                    }
-	                    return bothLines ? { ford: 'yes' } : {};
-	                }
-	            }
-	        }
-	        return null;
-	    }
+	        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;
 
-	    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;
-	                }
+	        case XOR:
+	          return true;
+	      }
 
-	                // create only one issue for building crossings
-	                oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+	      break;
 
-	                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;
-	    }
+	    case SAME_TRANSITION:
+	      return operation === INTERSECTION || operation === UNION;
 
+	    case DIFFERENT_TRANSITION:
+	      return operation === DIFFERENCE;
 
-	    function waysToCheck(entity, graph) {
-	        var featureType = getFeatureType(entity, graph);
-	        if (!featureType) { return []; }
+	    case NON_CONTRIBUTING:
+	      return false;
+	  }
 
-	        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 [];
-	    }
+	  return false;
+	}
+	/* eslint-enable indent */
 
 
-	    var validation = function checkCrossingWays(entity, graph) {
+	function determineResultTransition(event, operation) {
+	  var thisIn = !event.inOut;
+	  var thatIn = !event.otherInOut;
+	  var isIn;
 
-	        var tree = context.history().tree();
+	  switch (operation) {
+	    case INTERSECTION:
+	      isIn = thisIn && thatIn;
+	      break;
 
-	        var ways = waysToCheck(entity, graph);
+	    case UNION:
+	      isIn = thisIn || thatIn;
+	      break;
 
-	        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;
-	    };
+	    case XOR:
+	      isIn = thisIn ^ thatIn;
+	      break;
 
+	    case DIFFERENCE:
+	      if (event.isSubject) {
+	        isIn = thisIn && !thatIn;
+	      } else {
+	        isIn = thatIn && !thisIn;
+	      }
 
-	    function createIssue(crossing, graph) {
+	      break;
+	  }
 
-	        // 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];
+	  return isIn ? +1 : -1;
+	}
 
-	        var connectionTags = tagsForConnectionNodeIfAllowed(entities[0], entities[1], graph);
+	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);
 
-	        var featureType1 = crossing.wayInfos[0].featureType;
-	        var featureType2 = crossing.wayInfos[1].featureType;
+	    /**
+	     * Is left endpoint?
+	     * @type {Boolean}
+	     */
+	    this.left = left;
+	    /**
+	     * @type {Array.<Number>}
+	     */
 
-	        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');
+	    this.point = point;
+	    /**
+	     * Other edge reference
+	     * @type {SweepEvent}
+	     */
 
-	        var subtype = [featureType1, featureType2].sort().join('-');
+	    this.otherEvent = otherEvent;
+	    /**
+	     * Belongs to source or clipping polygon
+	     * @type {Boolean}
+	     */
 
-	        var crossingTypeID = subtype;
+	    this.isSubject = isSubject;
+	    /**
+	     * Edge contribution type
+	     * @type {Number}
+	     */
 
-	        if (isCrossingIndoors) {
-	            crossingTypeID = 'indoor-indoor';
-	        } else if (isCrossingTunnels) {
-	            crossingTypeID = 'tunnel-tunnel';
-	        } else if (isCrossingBridges) {
-	            crossingTypeID = 'bridge-bridge';
-	        }
-	        if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
-	            crossingTypeID += '_connectable';
-	        }
+	    this.type = edgeType || NORMAL;
+	    /**
+	     * In-out transition for the sweepline crossing polygon
+	     * @type {Boolean}
+	     */
 
-	        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));
-	                }
+	    this.inOut = false;
+	    /**
+	     * @type {Boolean}
+	     */
 
-	                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'));
-	                    }
+	    this.otherInOut = false;
+	    /**
+	     * Previous event in result?
+	     * @type {SweepEvent}
+	     */
 
-	                    // 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'));
-	                    }
-	                }
+	    this.prevInResult = null;
+	    /**
+	     * Type of result transition (0 = not in result, +1 = out-in, -1, in-out)
+	     * @type {Number}
+	     */
 
-	                // repositioning the features is always an option
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-operation-move',
-	                    title: _t('issues.fix.reposition_features.title')
-	                }));
+	    this.resultTransition = 0; // connection step
 
-	                return fixes;
-	            }
-	        });
+	    /**
+	     * @type {Number}
+	     */
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.crossing_ways.' + crossingTypeID + '.reference'));
-	        }
-	    }
+	    this.otherPos = -1;
+	    /**
+	     * @type {Number}
+	     */
 
-	    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];
-	                }
+	    this.outputContourId = -1;
+	    this.isExteriorRing = true; // TODO: Looks unused, remove?
+	  }
+	  /**
+	   * @param  {Array.<Number>}  p
+	   * @return {Boolean}
+	   */
 
-	                var crossingLoc = this.issue.loc;
 
-	                var projection = context.projection;
+	  _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}
+	     */
 
-	                var action = function actionAddStructure(graph) {
+	  }, {
+	    key: "isAbove",
+	    value: function isAbove(p) {
+	      return !this.isBelow(p);
+	    }
+	    /**
+	     * @return {Boolean}
+	     */
 
-	                    var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+	  }, {
+	    key: "isVertical",
+	    value: function isVertical() {
+	      return this.point[0] === this.otherEvent.point[0];
+	    }
+	    /**
+	     * Does event belong to result?
+	     * @return {Boolean}
+	     */
 
-	                    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;
-	                    }
+	  }, {
+	    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 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;
+	  return SweepEvent;
+	}();
 
-	                    // add padding since the structure must extend past the edges of the crossed feature
-	                    structLengthMeters += 4;
+	function equals(p1, p2) {
+	  if (p1[0] === p2[0]) {
+	    if (p1[1] === p2[1]) {
+	      return true;
+	    } else {
+	      return false;
+	    }
+	  }
 
-	                    // clamp the length to a reasonable range
-	                    structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
+	  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;
+	// };
 
-	                    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
-	                        ];
-	                    }
+	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];
+	  }
 
-	                    var projEdgeNode1 = geomToProj(edgeNodes[0].loc);
-	                    var projEdgeNode2 = geomToProj(edgeNodes[1].loc);
+	  var hindex = 0;
 
-	                    var projectedAngle = geoVecAngle(projEdgeNode1, projEdgeNode2);
+	  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 projectedCrossingLoc = geomToProj(crossingLoc);
-	                    var linearToSphericalMetersRatio = geoVecLength(projEdgeNode1, projEdgeNode2) /
-	                        geoSphericalDistance(edgeNodes[0].loc, edgeNodes[1].loc);
+	    Q = Qnew;
 
-	                    function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
-	                        var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
-	                        return projToGeom([
-	                            projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters,
-	                            projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters
-	                        ]);
-	                    }
+	    if (hh !== 0) {
+	      h[hindex++] = hh;
+	    }
 
-	                    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;
-	                    }
+	    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 structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
-	                    var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
+	      Q = Qnew;
 
-	                    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;
-	                    });
+	      if (hh !== 0) {
+	        h[hindex++] = hh;
+	      }
+	    }
+	  }
 
-	                    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;
-	                };
+	  while (eindex < elen) {
+	    Qnew = Q + enow;
+	    bvirt = Qnew - Q;
+	    hh = Q - (Qnew - bvirt) + (enow - bvirt);
+	    enow = e[++eindex];
+	    Q = Qnew;
 
-	                context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
-	                context.enter(modeSelect(context, resultWayIDs));
-	            }
-	        });
+	    if (hh !== 0) {
+	      h[hindex++] = hh;
 	    }
+	  }
 
-	    function makeConnectWaysFix(connectionTags) {
+	  while (findex < flen) {
+	    Qnew = Q + fnow;
+	    bvirt = Qnew - Q;
+	    hh = Q - (Qnew - bvirt) + (fnow - bvirt);
+	    fnow = f[++findex];
+	    Q = Qnew;
 
-	        var fixTitleID = 'connect_features';
-	        if (connectionTags.ford) {
-	            fixTitleID = 'connect_using_ford';
-	        }
+	    if (hh !== 0) {
+	      h[hindex++] = hh;
+	    }
+	  }
 
-	        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;
+	  if (Q !== 0 || hindex === 0) {
+	    h[hindex++] = Q;
+	  }
 
-	                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')
-	                );
-	            }
-	        });
-	    }
+	  return hindex;
+	}
+	function estimate(elen, e) {
+	  var Q = e[0];
 
-	    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) {
+	  for (var i = 1; i < elen; i++) {
+	    Q += e[i];
+	  }
 
-	                var mode = context.mode();
-	                if (!mode || mode.id !== 'select') { return; }
+	  return Q;
+	}
+	function vec(n) {
+	  return new Float64Array(n);
+	}
 
-	                var selectedIDs = mode.selectedIDs();
-	                if (selectedIDs.length !== 1) { return; }
+	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);
 
-	                var selectedID = selectedIDs[0];
-	                if (!this.issue.entityIds.some(function(entityId) {
-	                    return entityId === selectedID;
-	                })) { return; }
+	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 entity = context.hasEntity(selectedID);
-	                if (!entity) { return; }
+	  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];
+	}
 
-	                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 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);
+	}
 
-	    validation.type = type;
+	/**
+	 * Signed area of the triangle (p0, p1, p2)
+	 * @param  {Array.<Number>} p0
+	 * @param  {Array.<Number>} p1
+	 * @param  {Array.<Number>} p2
+	 * @return {Number}
+	 */
 
-	    return validation;
+	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;
 	}
 
-	function validationDisconnectedWay() {
-	    var type = 'disconnected_way';
+	/**
+	 * @param  {SweepEvent} e1
+	 * @param  {SweepEvent} e2
+	 * @return {Number}
+	 */
 
-	    function isTaggedAsHighway(entity) {
-	        return osmRoutableHighwayTagValues[entity.tags.highway];
-	    }
+	function compareEvents(e1, e2) {
+	  var p1 = e1.point;
+	  var p2 = e2.point; // Different x-coordinate
 
-	    var validation = function checkDisconnectedWay(entity, graph) {
+	  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 routingIslandWays = routingIslandForEntity(entity);
-	        if (!routingIslandWays) { return []; }
+	  if (p1[1] !== p2[1]) return p1[1] > p2[1] ? 1 : -1;
+	  return specialCases(e1, e2, p1);
+	}
+	/* eslint-disable no-unused-vars */
 
-	        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 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
 
+	  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;
+	  }
 
-	        function makeFixes(context) {
+	  return !e1.isSubject && e2.isSubject ? 1 : -1;
+	}
+	/* eslint-enable no-unused-vars */
 
-	            var fixes = [];
+	/**
+	 * @param  {SweepEvent} se
+	 * @param  {Array.<Number>} p
+	 * @param  {Queue} queue
+	 * @return {Queue}
+	 */
 
-	            var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
+	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 (singleEntity) {
+	  if (equals(se.point, se.otherEvent.point)) {
+	    console.warn('what is that, a collapsed segment?', se);
+	  }
+	  /* eslint-enable no-console */
 
-	                if (singleEntity.type === 'way' && !singleEntity.isClosed()) {
 
-	                    var textDirection = _mainLocalizer.textDirection();
+	  r.contourId = l.contourId = se.contourId; // avoid a rounding error. The left event would be processed after the right event
 
-	                    var startFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.first(), 'start');
-	                    if (startFix) { fixes.push(startFix); }
+	  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) {}
 
-	                    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')
-	                    }));
-	                }
 
-	                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')
-	                }));
-	            }
+	  se.otherEvent.otherEvent = l;
+	  se.otherEvent = r;
+	  queue.push(l);
+	  queue.push(r);
+	  return queue;
+	}
 
-	            return fixes;
-	        }
+	//const EPS = 1e-9;
+
+	/**
+	 * 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
+	 */
 
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.disconnected_way.routable.reference'));
-	        }
+	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.
+	 */
+
 
-	        function routingIslandForEntity(entity) {
+	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 routingIsland = new Set();  // the interconnected routable features
-	            var waysToCheck = [];           // the queue of remaining routable ways to traverse
+	  /* eslint-disable arrow-body-style */
 
-	            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);
-	                    }
-	                });
-	            }
+	  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.
 
-	            if (entity.type === 'way' && isRoutableWay(entity, true)) {
 
-	                routingIsland.add(entity);
-	                waysToCheck.push(entity);
+	  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.
 
-	            } else if (entity.type === 'node' && isRoutableNode(entity)) {
+	  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;
 
-	                routingIsland.add(entity);
-	                queueParentWays(entity);
+	      if (s < 0 || s > 1) {
+	        // not on line segment a
+	        return null;
+	      }
 
-	            } else {
-	                // this feature isn't routable, cannot be a routing island
-	                return null;
-	            }
+	      var t = crossProduct(e, va) / kross;
 
-	            while (waysToCheck.length) {
-	                var wayToCheck = waysToCheck.pop();
-	                var childNodes = graph.childNodes(wayToCheck);
-	                for (var i in childNodes) {
-	                    var vertex = childNodes[i];
+	      if (t < 0 || t > 1) {
+	        // not on line segment b
+	        return null;
+	      }
 
-	                    if (isConnectedVertex(vertex)) {
-	                        // found a link to the wider network, not a routing island
-	                        return null;
-	                    }
+	      if (s === 0 || s === 1) {
+	        // on an endpoint of line segment a
+	        return noEndpointTouch ? null : [toPoint(a1, s, va)];
+	      }
 
-	                    if (isRoutableNode(vertex)) {
-	                        routingIsland.add(vertex);
-	                    }
+	      if (t === 0 || t === 1) {
+	        // on an endpoint of line segment b
+	        return noEndpointTouch ? null : [toPoint(b1, t, vb)];
+	      }
 
-	                    queueParentWays(vertex);
-	                }
-	            }
+	      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);
 
-	            // no network link found, this is a routing island, return its members
-	            return routingIsland;
-	        }
 
-	        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; }
+	  kross = crossProduct(e, va);
+	  sqrKross = kross * kross;
 
-	            // entrances are considered connected
-	            if (vertex.tags.entrance &&
-	                vertex.tags.entrance !== 'no') { return true; }
-	            if (vertex.tags.amenity === 'parking_entrance') { return true; }
+	  if (sqrKross > 0
+	  /* EPS * sqLenB * sqLenE */
+	  ) {
+	      // Lines are just parallel, not the same. No overlap.
+	      return null;
+	    }
 
-	            return false;
-	        }
+	  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 isRoutableNode(node) {
-	            // treat elevators as distinct features in the highway network
-	            if (node.tags.highway === 'elevator') { return true; }
-	            return false;
-	        }
+	  if (smin <= 1 && smax >= 0) {
+	    // overlap on an end point
+	    if (smin === 1) {
+	      return noEndpointTouch ? null : [toPoint(a1, smin > 0 ? smin : 0, va)];
+	    }
 
-	        function isRoutableWay(way, ignoreInnerWays) {
-	            if (isTaggedAsHighway(way) || way.tags.route === 'ferry') { return true; }
+	    if (smax === 0) {
+	      return noEndpointTouch ? null : [toPoint(a1, smax < 1 ? smax : 1, va)];
+	    }
 
-	            return graph.parentRelations(way).some(function(parentRelation) {
-	                if (parentRelation.tags.type === 'route' &&
-	                    parentRelation.tags.route === 'ferry') { return true; }
+	    if (noEndpointTouch && smin === 0 && smax === 1) return null; // There's overlap on a segment -- two points of intersection. Return both.
 
-	                if (parentRelation.isMultipolygon() &&
-	                    isTaggedAsHighway(parentRelation) &&
-	                    (!ignoreInnerWays || parentRelation.memberById(way.id).role !== 'inner')) { return true; }
-	            });
-	        }
+	    return [toPoint(a1, smin > 0 ? smin : 0, va), toPoint(a1, smax < 1 ? smax : 1, va)];
+	  }
 
-	        function makeContinueDrawingFixIfAllowed(textDirection, vertexID, whichEnd) {
-	            var vertex = graph.hasEntity(vertexID);
-	            if (!vertex || vertex.tags.noexit === 'yes') { return null; }
+	  return null;
+	}
 
-	            var useLeftContinue = (whichEnd === 'start' && textDirection === 'ltr') ||
-	                (whichEnd === 'end' && textDirection === 'rtl');
+	/**
+	 * @param  {SweepEvent} se1
+	 * @param  {SweepEvent} se2
+	 * @param  {Queue}      queue
+	 * @return {Number}
+	 */
 
-	            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);
+	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
 
-	                    if (!way || !vertex) { return; }
+	  if (nintersections === 1 && (equals(se1.point, se2.point) || equals(se1.otherEvent.point, se2.otherEvent.point))) {
+	    return 0;
+	  }
 
-	                    // make sure the vertex is actually visible and editable
-	                    var map = context.map();
-	                    if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-	                        map.zoomToEase(vertex);
-	                    }
+	  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
 
-	                    context.enter(
-	                        modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true)
-	                    );
-	                }
-	            });
-	        }
 
-	    };
+	  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
 
-	    validation.type = type;
 
-	    return validation;
-	}
+	    if (!equals(se2.point, inter[0]) && !equals(se2.otherEvent.point, inter[0])) {
+	      divideSegment(se2, inter[0], queue);
+	    }
 
-	function validationFormatting() {
-	    var type = 'invalid_format';
+	    return 1;
+	  } // The line segments associated to se1 and se2 overlap
 
-	    var validation = function(entity) {
-	        var issues = [];
 
-	        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;
+	  var events = [];
+	  var leftCoincide = false;
+	  var rightCoincide = false;
 
-	            // 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' : ''
-	                }));
-	            }
-	        }
+	  if (equals(se1.point, se2.point)) {
+	    leftCoincide = true; // linked
+	  } else if (compareEvents(se1, se2) === 1) {
+	    events.push(se2, se1);
+	  } else {
+	    events.push(se1, se2);
+	  }
 
-	        return issues;
-	    };
+	  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);
+	  }
 
-	    validation.type = type;
+	  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;
 
-	    return validation;
-	}
+	    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 validationHelpRequest(context) {
-	    var type = 'help_request';
+	    return 2;
+	  } // the line segments share the right endpoint
 
-	    var validation = function checkFixmeTag(entity) {
 
-	        if (!entity.tags.fixme) { return []; }
+	  if (rightCoincide) {
+	    divideSegment(events[0], events[1].point, queue);
+	    return 3;
+	  } // no line segment includes totally the other one
 
-	        // don't flag fixmes on features added by the user
-	        if (entity.version === undefined) { return []; }
 
-	        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 []; }
-	        }
+	  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
 
-	        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 showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.fixme_tag.reference'));
-	        }
-	    };
+	  divideSegment(events[0], events[1].point, queue);
+	  divideSegment(events[3].otherEvent, events[2].point, queue);
+	  return 3;
+	}
 
-	    validation.type = type;
+	/**
+	 * @param  {SweepEvent} le1
+	 * @param  {SweepEvent} le2
+	 * @return {Number}
+	 */
 
-	    return validation;
-	}
+	function compareSegments(le1, le2) {
+	  if (le1 === le2) return 0; // Segments are not collinear
 
-	function validationImpossibleOneway() {
-	    var type = 'impossible_oneway';
+	  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
 
-	    var validation = function checkImpossibleOneway(entity, graph) {
+	    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 ?
 
-	        if (entity.type !== 'way' || entity.geometry(graph) !== 'line') { return []; }
+	    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 (entity.isClosed()) { return []; }
+	    return le1.isBelow(le2.point) ? -1 : 1;
+	  }
 
-	        if (!typeForWay(entity)) { return []; }
+	  if (le1.isSubject === le2.isSubject) {
+	    // same polygon
+	    var p1 = le1.point,
+	        p2 = le2.point;
 
-	        if (!isOneway(entity)) { return []; }
+	    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 firstIssues = issuesForNode(entity, entity.first());
-	        var lastIssues = issuesForNode(entity, entity.last());
+	  return compareEvents(le1, le2) === 1 ? 1 : -1;
+	}
 
-	        return firstIssues.concat(lastIssues);
+	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;
 
-	        function typeForWay(way) {
-	            if (way.geometry(graph) !== 'line') { return null; }
+	  while (eventQueue.length !== 0) {
+	    var event = eventQueue.pop();
+	    sortedEvents.push(event); // optimization by bboxes for intersection and difference goes here
 
-	            if (osmRoutableHighwayTagValues[way.tags.highway]) { return 'highway'; }
-	            if (osmFlowingWaterwayTagValues[way.tags.waterway]) { return 'waterway'; }
-	            return null;
-	        }
+	    if (operation === INTERSECTION && event.point[0] > rightbound || operation === DIFFERENCE && event.point[0] > sbbox[2]) {
+	      break;
+	    }
 
-	        function isOneway(way) {
-	            if (way.tags.oneway === 'yes') { return true; }
-	            if (way.tags.oneway) { return false; }
+	    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);
 
-	            for (var key in way.tags) {
-	                if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
-	                    return true;
-	                }
-	            }
-	            return false;
+	      if (next) {
+	        if (possibleIntersection(event, next.key, eventQueue) === 2) {
+	          computeFields(event, prevEvent, operation);
+	          computeFields(event, next.key, operation);
 	        }
+	      }
 
-	        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;
+	      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);
 
-	        function isConnectedViaOtherTypes(way, node) {
-
-	            var wayType = typeForWay(way);
-
-	            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; }
-	                }
-	            }
-
-	            return graph.parentWays(node).some(function(parentWay) {
-	                if (parentWay.id === way.id) { return false; }
+	      if (prev && next) {
+	        if (prev !== begin) prev = sweepLine.prev(prev);else prev = null;
+	        next = sweepLine.next(next);
+	        sweepLine.remove(event);
 
-	                if (wayType === 'highway') {
+	        if (next && prev) {
+	          possibleIntersection(prev.key, next.key, eventQueue);
+	        }
+	      }
+	    }
+	  }
 
-	                    // allow connections to highway areas
-	                    if (parentWay.geometry(graph) === 'area' &&
-	                        osmRoutableHighwayTagValues[parentWay.tags.highway]) { return true; }
+	  return sortedEvents;
+	}
 
-	                    // count connections to ferry routes as connected
-	                    if (parentWay.tags.route === 'ferry') { return true; }
+	var Contour = /*#__PURE__*/function () {
+	  /**
+	   * Contour
+	   *
+	   * @class {Contour}
+	   */
+	  function Contour() {
+	    _classCallCheck(this, Contour);
 
-	                    return graph.parentRelations(parentWay).some(function(parentRelation) {
-	                        if (parentRelation.tags.type === 'route' &&
-	                            parentRelation.tags.route === 'ferry') { return true; }
+	    this.points = [];
+	    this.holeIds = [];
+	    this.holeOf = null;
+	    this.depth = null;
+	  }
 
-	                        // 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;
-	            });
-	        }
+	  _createClass(Contour, [{
+	    key: "isExterior",
+	    value: function isExterior() {
+	      return this.holeOf == null;
+	    }
+	  }]);
 
-	        function issuesForNode(way, nodeID) {
+	  return Contour;
+	}();
 
-	            var isFirst = nodeID === way.first();
+	/**
+	 * @param  {Array.<SweepEvent>} sortedEvents
+	 * @return {Array.<SweepEvent>}
+	 */
 
-	            var wayType = typeForWay(way);
+	function orderEvents(sortedEvents) {
+	  var event, i, len, tmp;
+	  var resultEvents = [];
 
-	            // ignore if this way is self-connected at this node
-	            if (nodeOccursMoreThanOnce(way, nodeID)) { return []; }
+	  for (i = 0, len = sortedEvents.length; i < len; i++) {
+	    event = sortedEvents[i];
 
-	            var osm = services.osm;
-	            if (!osm) { return []; }
+	    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 node = graph.hasEntity(nodeID);
 
-	            // ignore if this node or its tile are unloaded
-	            if (!node || !osm.isDataLoaded(node.loc)) { return []; }
+	  var sorted = false;
 
-	            if (isConnectedViaOtherTypes(way, node)) { return []; }
+	  while (!sorted) {
+	    sorted = true;
 
-	            var attachedWaysOfSameType = graph.parentWays(node).filter(function(parentWay) {
-	                if (parentWay.id === way.id) { return false; }
-	                return typeForWay(parentWay) === wayType;
-	            });
+	    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;
+	      }
+	    }
+	  }
 
-	            // assume it's okay for waterways to start or end disconnected for now
-	            if (wayType === 'waterway' && attachedWaysOfSameType.length === 0) { return []; }
+	  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
 
-	            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 []; }
+	  for (i = 0, len = resultEvents.length; i < len; i++) {
+	    event = resultEvents[i];
 
-	            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 (!event.left) {
+	      tmp = event.otherPos;
+	      event.otherPos = event.otherEvent.otherPos;
+	      event.otherEvent.otherPos = tmp;
+	    }
+	  }
 
-	            var placement = isFirst ? 'start' : 'end',
-	                messageID = wayType + '.',
-	                referenceID = wayType + '.';
+	  return resultEvents;
+	}
+	/**
+	 * @param  {Number} pos
+	 * @param  {Array.<SweepEvent>} resultEvents
+	 * @param  {Object>}    processed
+	 * @return {Number}
+	 */
 
-	            if (wayType === 'waterway') {
-	                messageID += 'connected.' + placement;
-	                referenceID += 'connected';
-	            } else {
-	                messageID += placement;
-	                referenceID += placement;
-	            }
 
-	            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);
-	                            }
-	                        }));
-	                    }
+	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;
 
-	                    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'));
-	                };
-	            }
-	        }
-	    };
+	  while (newPos < length && p1[0] === p[0] && p1[1] === p[1]) {
+	    if (!processed[newPos]) {
+	      return newPos;
+	    } else {
+	      newPos++;
+	    }
 
-	    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);
-	        }
+	    p1 = resultEvents[newPos].point;
+	  }
 
-	        context.enter(
-	            modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true)
-	        );
-	    }
+	  newPos = pos - 1;
 
-	    validation.type = type;
+	  while (processed[newPos] && newPos > origPos) {
+	    newPos--;
+	  }
 
-	    return validation;
+	  return newPos;
 	}
 
-	function validationIncompatibleSource() {
-	    var type = 'incompatible_source';
-	    var invalidSources = [
-	        {
-	            id:'google', regex:'google', exceptRegex: 'books.google|Google Books|drive.google|googledrive|Google Drive'
-	        }
-	    ];
+	function initializeContourFromContext(event, contours, contourId) {
+	  var contour = new Contour();
 
-	    var validation = function checkIncompatibleSource(entity) {
+	  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 entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
+	    var lowerContourId = prevInResult.outputContourId;
+	    var lowerResultTransition = prevInResult.resultTransition;
 
-	        if (!entitySources) { return []; }
+	    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 issues = [];
+	      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;
+	  }
 
-	        invalidSources.forEach(function(invalidSource) {
+	  return contour;
+	}
+	/**
+	 * @param  {Array.<SweepEvent>} sortedEvents
+	 * @return {Array.<*>} polygons
+	 */
 
-	            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; }
+	function connectEdges(sortedEvents) {
+	  var i, len;
+	  var resultEvents = orderEvents(sortedEvents); // "false"-filled array
 
-	            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')
-	                        })
-	                    ];
-	                }
-	            }));
-	        });
+	  var processed = {};
+	  var contours = [];
 
-	        return issues;
+	  var _loop = function _loop() {
+	    if (processed[i]) {
+	      return "continue";
+	    }
 
+	    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
 
-	        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'));
-	            };
-	        }
+	    var markAsProcessed = function markAsProcessed(pos) {
+	      processed[pos] = true;
+	      resultEvents[pos].outputContourId = contourId;
 	    };
 
-	    validation.type = type;
+	    var pos = i;
+	    var origPos = i;
+	    var initial = resultEvents[i].point;
+	    contour.points.push(initial);
+	    /* eslint no-constant-condition: "off" */
 
-	    return validation;
-	}
+	    while (true) {
+	      markAsProcessed(pos);
+	      pos = resultEvents[pos].otherPos;
+	      markAsProcessed(pos);
+	      contour.points.push(resultEvents[pos].point);
+	      pos = nextPos(pos, resultEvents, processed, origPos);
 
-	function validationMaprules() {
-	    var type = 'maprules';
+	      if (pos == origPos) {
+	        break;
+	      }
+	    }
 
-	    var validation = function checkMaprules(entity, graph) {
-	        if (!services.maprules) { return []; }
+	    contours.push(contour);
+	  };
 
-	        var rules = services.maprules.validationRules();
-	        var issues = [];
+	  for (i = 0, len = resultEvents.length; i < len; i++) {
+	    var _ret = _loop();
 
-	        for (var i = 0; i < rules.length; i++) {
-	            var rule = rules[i];
-	            rule.findIssues(entity, graph, issues);
-	        }
+	    if (_ret === "continue") continue;
+	  }
 
-	        return issues;
-	    };
+	  return contours;
+	}
 
+	var tinyqueue = TinyQueue;
+	var _default$1 = TinyQueue;
 
-	    validation.type = type;
+	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;
 
-	    return validation;
+	  if (this.length > 0) {
+	    for (var i = (this.length >> 1) - 1; i >= 0; i--) {
+	      this._down(i);
+	    }
+	  }
 	}
 
-	function validationMismatchedGeometry() {
-	    var type = 'mismatched_geometry';
+	function defaultCompare$1(a, b) {
+	  return a < b ? -1 : a > b ? 1 : 0;
+	}
 
-	    function tagSuggestingLineIsArea(entity) {
-	        if (entity.type !== 'way' || entity.isClosed()) { return null; }
+	TinyQueue.prototype = {
+	  push: function push(item) {
+	    this.data.push(item);
+	    this.length++;
 
-	        var tagSuggestingArea = entity.tagSuggestingArea();
-	        if (!tagSuggestingArea) {
-	            return null;
-	        }
+	    this._up(this.length - 1);
+	  },
+	  pop: function pop() {
+	    if (this.length === 0) return undefined;
+	    var top = this.data[0];
+	    this.length--;
 
-	        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;
-	        }
+	    if (this.length > 0) {
+	      this.data[0] = this.data[this.length];
 
-	        return tagSuggestingArea;
+	      this._down(0);
 	    }
 
+	    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];
 
-	    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
-	        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')
-	                    );
-	                };
-	            }
-	        }
-
-	        // 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')
-	                );
-	            };
-	        }
+	    while (pos > 0) {
+	      var parent = pos - 1 >> 1;
+	      var current = data[parent];
+	      if (compare(item, current) >= 0) break;
+	      data[pos] = current;
+	      pos = parent;
 	    }
 
-	    function lineTaggedAsAreaIssue(entity) {
+	    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];
+	      }
 
-	        var tagSuggestingArea = tagSuggestingLineIsArea(entity);
-	        if (!tagSuggestingArea) { return null; }
+	      if (compare(best, item) >= 0) break;
+	      data[pos] = best;
+	      pos = left;
+	    }
 
-	        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) {
+	    data[pos] = item;
+	  }
+	};
+	tinyqueue["default"] = _default$1;
 
-	                var fixes = [];
+	var max$5 = Math.max;
+	var min$a = Math.min;
+	var contourId = 0;
 
-	                var entity = context.entity(this.entityIds[0]);
-	                var connectEndsOnClick = makeConnectEndpointsFixOnClick(entity, context.graph());
+	function processPolygon(contourOrHole, isSubject, depth, Q, bbox, isExteriorRing) {
+	  var i, len, s1, s2, e1, e2;
 
-	                fixes.push(new validationIssueFix({
-	                    title: _t('issues.fix.connect_endpoints.title'),
-	                    onClick: connectEndsOnClick
-	                }));
+	  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;
 
-	                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')
-	                        );
-	                    }
-	                }));
+	    if (s1[0] === s2[0] && s1[1] === s2[1]) {
+	      continue; // skip collapsed edges, or it breaks
+	    }
 
-	                return fixes;
-	            }
-	        });
+	    e1.contourId = e2.contourId = depth;
 
+	    if (!isExteriorRing) {
+	      e1.isExteriorRing = false;
+	      e2.isExteriorRing = false;
+	    }
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.tag_suggests_area.reference'));
-	        }
+	    if (compareEvents(e1, e2) > 0) {
+	      e2.left = true;
+	    } else {
+	      e1.left = true;
 	    }
 
-	    function vertexTaggedAsPointIssue(entity, graph) {
-	        // we only care about nodes
-	        if (entity.type !== 'node') { return null; }
+	    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.
 
-	        // ignore tagless points
-	        if (Object.keys(entity.tags).length === 0) { return null; }
+	    Q.push(e1);
+	    Q.push(e2);
+	  }
+	}
 
-	        // address lines are special so just ignore them
-	        if (entity.isOnAddressLine(graph)) { return null; }
+	function fillQueue(subject, clipping, sbbox, cbbox, operation) {
+	  var eventQueue = new tinyqueue(null, compareEvents);
+	  var polygonSet, isExteriorRing, i, ii, j, jj; //, k, kk;
 
-	        var geometry = entity.geometry(graph);
-	        var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
+	  for (i = 0, ii = subject.length; i < ii; i++) {
+	    polygonSet = subject[i];
 
-	        if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
+	    for (j = 0, jj = polygonSet.length; j < jj; j++) {
+	      isExteriorRing = j === 0;
+	      if (isExteriorRing) contourId++;
+	      processPolygon(polygonSet[j], true, contourId, eventQueue, sbbox, isExteriorRing);
+	    }
+	  }
 
-	            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]
-	            });
+	  for (i = 0, ii = clipping.length; i < ii; i++) {
+	    polygonSet = clipping[i];
 
-	        } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
+	    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 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 eventQueue;
+	}
 
-	                    return [
-	                        new validationIssueFix({
-	                            icon: 'iD-operation-extract',
-	                            title: _t('issues.fix.extract_point.title'),
-	                            onClick: extractOnClick
-	                        })
-	                    ];
-	                }
-	            });
-	        }
+	var EMPTY = [];
 
-	        return null;
+	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;
 	    }
+	  }
 
-	    function unclosedMultipolygonPartIssues(entity, graph) {
+	  return result;
+	}
 
-	        if (entity.type !== 'relation' ||
-	            !entity.isMultipolygon() ||
-	            entity.isDegenerate() ||
-	            // cannot determine issues for incompletely-downloaded relations
-	            !entity.isComplete(graph)) { return null; }
+	function compareBBoxes(subject, clipping, sbbox, cbbox, operation) {
+	  var result = null;
 
-	        var sequences = osmJoinWays(entity.members, graph);
+	  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);
+	    }
+	  }
 
-	        var issues = [];
+	  return result;
+	}
 
-	        for (var i in sequences) {
-	            var sequence = sequences[i];
+	function _boolean(subject, clipping, operation) {
+	  if (typeof subject[0][0][0] === 'number') {
+	    subject = [subject];
+	  }
 
-	            if (!sequence.nodes) { continue; }
+	  if (typeof clipping[0][0][0] === 'number') {
+	    clipping = [clipping];
+	  }
 
-	            var firstNode = sequence.nodes[0];
-	            var lastNode = sequence.nodes[sequence.nodes.length - 1];
+	  var trivial = trivialOperation(subject, clipping, operation);
 
-	            // part is closed if the first and last nodes are the same
-	            if (firstNode === lastNode) { continue; }
+	  if (trivial) {
+	    return trivial === EMPTY ? null : trivial;
+	  }
 
-	            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);
-	        }
+	  var sbbox = [Infinity, Infinity, -Infinity, -Infinity];
+	  var cbbox = [Infinity, Infinity, -Infinity, -Infinity]; // console.time('fill queue');
 
-	        return issues;
+	  var eventQueue = fillQueue(subject, clipping, sbbox, cbbox, operation); //console.timeEnd('fill queue');
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.unclosed_multipolygon_part.reference'));
-	        }
-	    }
+	  trivial = compareBBoxes(subject, clipping, sbbox, cbbox, operation);
 
-	    var validation = function checkMismatchedGeometry(entity, graph) {
-	        var issues = [
-	            vertexTaggedAsPointIssue(entity, graph),
-	            lineTaggedAsAreaIssue(entity)
-	        ];
-	        issues = issues.concat(unclosedMultipolygonPartIssues(entity, graph));
-	        return issues.filter(Boolean);
-	    };
+	  if (trivial) {
+	    return trivial === EMPTY ? null : trivial;
+	  } // console.time('subdivide edges');
 
-	    validation.type = type;
 
-	    return validation;
-	}
+	  var sortedEvents = subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation); //console.timeEnd('subdivide edges');
+	  // console.time('connect vertices');
 
-	function validationMissingRole() {
-	    var type = 'missing_role';
+	  var contours = connectEdges(sortedEvents); //console.timeEnd('connect vertices');
+	  // Convert contours to polygons
 
-	    var validation = function checkMissingRole(entity, graph) {
-	        var issues = [];
-	        if (entity.type === 'way') {
-	            graph.parentRelations(entity).forEach(function(relation) {
-	                if (!relation.isMultipolygon()) { return; }
+	  var polygons = [];
 
-	                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));
-	                }
-	            });
-	        }
+	  for (var i = 0; i < contours.length; i++) {
+	    var contour = contours[i];
 
-	        return issues;
-	    };
+	    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);
+	      }
 
-	    function isMissingRole(member) {
-	        return !member.role || !member.role.trim().length;
+	      polygons.push(rings);
 	    }
+	  }
 
+	  return polygons;
+	}
 
-	    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')
-	                            );
-	                        }
-	                    })
-	                ];
-	            }
-	        });
+	function union(subject, clipping) {
+	  return _boolean(subject, clipping, UNION);
+	}
 
+	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 showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.missing_role.multipolygon.reference'));
-	        }
-	    }
+	  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
+	  m = e & (1 << -nBits) - 1;
+	  e >>= -nBits;
+	  nBits += mLen;
 
-	    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')
-	                );
-	            }
-	        });
-	    }
+	  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
-	    validation.type = type;
+	  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 validation;
-	}
+	  return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
+	};
 
-	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);
-	                }
-	            });
+	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 (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
+	  if (isNaN(value) || value === Infinity) {
+	    m = isNaN(value) ? 1 : 0;
+	    e = eMax;
+	  } else {
+	    e = Math.floor(Math.log(value) / Math.LN2);
 
-	            // 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);
-	        }
+	    if (value * (c = Math.pow(2, -e)) < 1) {
+	      e--;
+	      c *= 2;
+	    }
 
-	        return keys.length > 0;
+	    if (e + eBias >= 1) {
+	      value += rt / c;
+	    } else {
+	      value += rt * Math.pow(2, 1 - eBias);
 	    }
 
-	    function isUnknownRoad(entity) {
-	        return entity.type === 'way' && entity.tags.highway === 'road';
+	    if (value * c >= 2) {
+	      e++;
+	      c /= 2;
 	    }
 
-	    function isUntypedRelation(entity) {
-	        return entity.type === 'relation' && !entity.tags.type;
+	    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;
 	    }
+	  }
 
-	    var validation = function checkMissingTag(entity, graph) {
-
-	        var subtype;
+	  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
-	        var osm = context.connection();
-	        var isUnloadedNode = entity.type === 'node' && osm && !osm.isDataLoaded(entity.loc);
+	  e = e << mLen | m;
+	  eLen += mLen;
 
-	        // 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)) {
+	  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
 
-	            if (Object.keys(entity.tags).length === 0) {
-	                subtype = 'any';
-	            } else if (!hasDescriptiveTags(entity, graph)) {
-	                subtype = 'descriptive';
-	            } else if (isUntypedRelation(entity)) {
-	                subtype = 'relation_type';
-	            }
-	        }
+	  buffer[offset + i - d] |= s * 128;
+	};
 
-	        // flag an unknown road even if it's a member of a relation
-	        if (!subtype && isUnknownRoad(entity)) {
-	            subtype = 'highway_classification';
-	        }
+	var ieee754$1 = {
+	  read: read$6,
+	  write: write$6
+	};
 
-	        if (!subtype) { return []; }
+	var pbf = Pbf;
 
-	        var messageID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag.' + subtype;
-	        var referenceID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag';
+	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;
+	}
 
-	        // 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';
+	Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
 
-	        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) {
+	Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
 
-	                var fixes = [];
+	Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
 
-	                var selectFixType = subtype === 'highway_classification' ? 'select_road_type' : 'select_preset';
+	Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
 
-	                fixes.push(new validationIssueFix({
-	                    icon: 'iD-icon-search',
-	                    title: _t('issues.fix.' + selectFixType + '.title'),
-	                    onClick: function(context) {
-	                        context.ui().sidebar.showPresetList();
-	                    }
-	                }));
+	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)
 
-	                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();
-	                        }
-	                    };
-	                }
+	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;
 
-	                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 (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);
+	    }
 
-	                return fixes;
-	            }
-	        })];
+	    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;
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.' + referenceID + '.reference'));
-	        }
-	    };
+	    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
 
-	    validation.type = type;
 
-	    return validation;
-	}
+	    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 || [];
 
-	// 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()
-	  );
-	};
+	    while (this.pos < end) {
+	      arr.push(this.readVarint(isSigned));
+	    }
 
-	// 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;
+	    return arr;
+	  },
+	  readPackedSVarint: function readPackedSVarint(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	  var kvndparts = kvnd.split('~', 2);
-	  if (kvndparts.length > 1) { parts.d = kvndparts[1]; }
+	    while (this.pos < end) {
+	      arr.push(this.readSVarint());
+	    }
 
-	  parts.kvn = kvndparts[0];
-	  var kvnparts = parts.kvn.split('|', 2);
-	  if (kvnparts.length > 1) { parts.n = kvnparts[1]; }
+	    return arr;
+	  },
+	  readPackedBoolean: function readPackedBoolean(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	  parts.kv = kvnparts[0];
-	  var kvparts = parts.kv.split('/', 2);
-	  parts.k = kvparts[0];
-	  parts.v = kvparts[1];
+	    while (this.pos < end) {
+	      arr.push(this.readBoolean());
+	    }
 
-	  parts.nsimple = simplify(parts.n);
-	  parts.kvnsimple = parts.kv + '|' + parts.nsimple;
-	  return parts;
-	};
+	    return arr;
+	  },
+	  readPackedFloat: function readPackedFloat(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	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
-	};
+	    while (this.pos < end) {
+	      arr.push(this.readFloat());
+	    }
 
-	var match_groups$1 = /*#__PURE__*/Object.freeze({
-		__proto__: null,
-		matchGroups: matchGroups,
-		'default': match_groups
-	});
+	    return arr;
+	  },
+	  readPackedDouble: function readPackedDouble(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	var require$$0 = getCjsExportFromNamespace(match_groups$1);
+	    while (this.pos < end) {
+	      arr.push(this.readDouble());
+	    }
 
-	var matchGroups$1 = require$$0.matchGroups;
+	    return arr;
+	  },
+	  readPackedFixed32: function readPackedFixed32(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());
+	    }
 
-	var matcher$1 = function () {
-	  var _warnings = [];  // array of match conflict pairs
-	  var _ambiguous = {};
-	  var _matchIndex = {};
-	  var matcher = {};
+	    return arr;
+	  },
+	  readPackedSFixed32: function readPackedSFixed32(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());
+	    }
 
-	  // 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'); });
+	    return arr;
+	  },
+	  readPackedFixed64: function readPackedFixed64(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());
+	    }
 
-	    function insertNames(kvnd, which) {
-	      var obj = brands[kvnd];
-	      var parts = to_parts(kvnd);
+	    return arr;
+	  },
+	  readPackedSFixed64: function readPackedSFixed64(arr) {
+	    if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
+	    var end = readPackedEnd(this);
+	    arr = arr || [];
 
-	      // 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; }
+	    while (this.pos < end) {
+	      arr.push(this.readSFixed64());
+	    }
 
+	    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;
 
-	      if (obj.countryCodes) {
-	        parts.countryCodes = obj.countryCodes.slice();  // copy
-	      }
+	    while (length < this.pos + min) {
+	      length *= 2;
+	    }
 
-	      var nomatches = (obj.nomatch || []);
-	      if (nomatches.some(function (s) { return s === kvnd; })) {
-	        console.log(("WARNING match/nomatch conflict for " + kvnd));
-	        return;
-	      }
+	    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;
 
-	      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(); });
+	    if (val > 0xfffffff || val < 0) {
+	      writeBigVarint(val, this);
+	      return;
+	    }
 
-	      var match_nsimple = [];
-	      if (which === 'primary') {
-	        match_nsimple = [parts.n]
-	          .concat(obj.matchNames || [])
-	          .concat(obj.tags.official_name || [])   // #2732 - match alternate names
-	          .map(simplify);
+	    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
 
-	      } 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);
-	      }
+	    var startPos = this.pos; // write the string directly to the buffer and see how much was written
 
-	      if (!match_nsimple.length) { return; }  // nothing to do
+	    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
 
-	      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;
+	    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);
 
-	          } else {
-	            // Names we mostly expect to be unique..
-	            if (!_matchIndex[kv]) { _matchIndex[kv] = {}; }
+	    for (var i = 0; i < len; i++) {
+	      this.buf[this.pos++] = buffer[i];
+	    }
+	  },
+	  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));
+	  }
+	};
 
-	            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
-	            }
-	          }
-	        });
-	      });
+	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 readPackedEnd(pbf) {
+	  return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
+	}
 
+	function toNum(low, high, isSigned) {
+	  if (isSigned) {
+	    return high * 0x100000000 + (low >>> 0);
+	  }
 
-	  // 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);
-	  };
+	  return (high >>> 0) * 0x100000000 + (low >>> 0);
+	}
 
+	function writeBigVarint(val, pbf) {
+	  var low, high;
 
-	  // 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 (val >= 0) {
+	    low = val % 0x100000000 | 0;
+	    high = val / 0x100000000 | 0;
+	  } else {
+	    low = ~(-val % 0x100000000);
+	    high = ~(-val / 0x100000000);
 
-	    // 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 (low ^ 0xffffffff) {
+	      low = low + 1 | 0;
+	    } else {
+	      low = 0;
+	      high = high + 1 | 0;
+	    }
+	  }
 
-	    // try to return an exact match
-	    match = _matchIndex[parts.kv] && _matchIndex[parts.kv][parts.nsimple];
-	    if (match && matchesCountryCode(match)) { return match; }
+	  if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
+	    throw new Error('Given varint doesn\'t fit into 10 bytes');
+	  }
 
-	    // look in match groups
-	    for (var mg in matchGroups$1) {
-	      var matchGroup = matchGroups$1[mg];
-	      match = null;
-	      inGroup = false;
+	  pbf.realloc(10);
+	  writeBigVarintLow(low, high, pbf);
+	  writeBigVarintHigh(high, pbf);
+	}
 
-	      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];
-	        }
+	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;
+	}
 
-	        if (match && !matchesCountryCode(match)) {
-	          match = null;
-	        }
+	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;
+	}
 
-	        if (inGroup && match) {
-	          return match;
-	        }
-	      }
-	    }
+	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
 
-	    return null;
+	  pbf.realloc(extraLen);
 
-	    function matchesCountryCode(match) {
-	      if (!countryCode) { return true; }
-	      if (!match.countryCodes) { return true; }
-	      return match.countryCodes.indexOf(countryCode) !== -1;
-	    }
-	  };
+	  for (var i = pbf.pos - 1; i >= startPos; i--) {
+	    pbf.buf[i + extraLen] = pbf.buf[i];
+	  }
+	}
 
+	function _writePackedVarint(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeVarint(arr[i]);
+	  }
+	}
 
-	  matcher.getWarnings = function () { return _warnings; };
+	function _writePackedSVarint(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSVarint(arr[i]);
+	  }
+	}
 
-	  return matcher;
-	};
+	function _writePackedFloat(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFloat(arr[i]);
+	  }
+	}
 
-	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);
+	function _writePackedDouble(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeDouble(arr[i]);
+	  }
 	}
 
-	function quickselectStep(arr, k, left, right, compare) {
+	function _writePackedBoolean(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeBoolean(arr[i]);
+	  }
+	}
 
-	    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 _writePackedFixed(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFixed32(arr[i]);
+	  }
+	}
 
-	        var t = arr[k];
-	        var i = left;
-	        var j = right;
+	function _writePackedSFixed(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeSFixed32(arr[i]);
+	  }
+	}
 
-	        swap(arr, left, k);
-	        if (compare(arr[right], t) > 0) { swap(arr, left, right); }
+	function _writePackedFixed2(arr, pbf) {
+	  for (var i = 0; i < arr.length; i++) {
+	    pbf.writeFixed64(arr[i]);
+	  }
+	}
 
-	        while (i < j) {
-	            swap(arr, i, j);
-	            i++;
-	            j--;
-	            while (compare(arr[i], t) < 0) { i++; }
-	            while (compare(arr[j], t) > 0) { j--; }
-	        }
+	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
 
-	        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; }
-	    }
+	function readUInt32(buf, pos) {
+	  return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
 	}
 
-	function swap(arr, i, j) {
-	    var tmp = arr[i];
-	    arr[i] = arr[j];
-	    arr[j] = tmp;
+	function writeInt32(buf, val, pos) {
+	  buf[pos] = val;
+	  buf[pos + 1] = val >>> 8;
+	  buf[pos + 2] = val >>> 16;
+	  buf[pos + 3] = val >>> 24;
 	}
 
-	function defaultCompare(a, b) {
-	    return a < b ? -1 : a > b ? 1 : 0;
+	function readInt32(buf, pos) {
+	  return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
 	}
 
-	return quickselect;
+	function readUtf8(buf, pos, end) {
+	  var str = '';
+	  var i = pos;
 
-	})));
-	});
+	  while (i < end) {
+	    var b0 = buf[i];
+	    var c = null; // codepoint
 
-	var rbush_1 = rbush;
-	var _default$2 = rbush;
+	    var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
+	    if (i + bytesPerSequence > end) break;
+	    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;
 
-	function rbush(maxEntries, format) {
-	    if (!(this instanceof rbush)) { return new rbush(maxEntries, format); }
+	        if (c <= 0x7F) {
+	          c = null;
+	        }
+	      }
+	    } else if (bytesPerSequence === 3) {
+	      b1 = buf[i + 1];
+	      b2 = buf[i + 2];
 
-	    // 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 ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
+	        c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | b2 & 0x3F;
 
-	    if (format) {
-	        this._initFormat(format);
+	        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;
+	        }
+	      }
 	    }
 
-	    this.clear();
-	}
+	    if (c === null) {
+	      c = 0xFFFD;
+	      bytesPerSequence = 1;
+	    } else if (c > 0xFFFF) {
+	      c -= 0x10000;
+	      str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
+	      c = 0xDC00 | c & 0x3FF;
+	    }
 
-	rbush.prototype = {
+	    str += String.fromCharCode(c);
+	    i += bytesPerSequence;
+	  }
 
-	    all: function () {
-	        return this._all(this.data, []);
-	    },
+	  return str;
+	}
 
-	    search: function (bbox) {
+	function readUtf8TextDecoder(buf, pos, end) {
+	  return utf8TextDecoder.decode(buf.subarray(pos, end));
+	}
 
-	        var node = this.data,
-	            result = [],
-	            toBBox = this.toBBox;
+	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;
+	        }
 
-	        if (!intersects$1(bbox, node)) { return result; }
+	        continue;
+	      }
+	    } else if (lead) {
+	      buf[pos++] = 0xEF;
+	      buf[pos++] = 0xBF;
+	      buf[pos++] = 0xBD;
+	      lead = null;
+	    }
 
-	        var nodesToSearch = [],
-	            i, len, child, childBBox;
+	    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;
+	        }
 
-	        while (node) {
-	            for (i = 0, len = node.children.length; i < len; i++) {
+	        buf[pos++] = c >> 0x6 & 0x3F | 0x80;
+	      }
 
-	                child = node.children[i];
-	                childBBox = node.leaf ? toBBox(child) : child;
+	      buf[pos++] = c & 0x3F | 0x80;
+	    }
+	  }
 
-	                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 pos;
+	}
 
-	        return result;
-	    },
+	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);
+	 */
 
-	    collides: function (bbox) {
+	function Point(x, y) {
+	  this.x = x;
+	  this.y = y;
+	}
 
-	        var node = this.data,
-	            toBBox = this.toBBox;
+	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);
+	  },
 
-	        if (!intersects$1(bbox, node)) { return false; }
+	  /**
+	   * 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);
+	  },
 
-	        var nodesToSearch = [],
-	            i, len, child, childBBox;
+	  /**
+	   * 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);
+	  },
 
-	        while (node) {
-	            for (i = 0, len = node.children.length; i < len; i++) {
+	  /**
+	   * 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);
+	  },
 
-	                child = node.children[i];
-	                childBBox = node.leaf ? toBBox(child) : child;
+	  /**
+	   * 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);
+	  },
 
-	                if (intersects$1(bbox, childBBox)) {
-	                    if (node.leaf || contains$2(bbox, childBBox)) { return true; }
-	                    nodesToSearch.push(child);
-	                }
-	            }
-	            node = nodesToSearch.pop();
-	        }
+	  /**
+	   * 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);
+	  },
 
-	        return false;
-	    },
+	  /**
+	   * 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);
+	  },
 
-	    load: function (data) {
-	        if (!(data && data.length)) { return this; }
+	  /**
+	   * 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);
+	  },
 
-	        if (data.length < this._minEntries) {
-	            for (var i = 0, len = data.length; i < len; i++) {
-	                this.insert(data[i]);
-	            }
-	            return this;
-	        }
+	  /**
+	   * 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);
+	  },
 
-	        // recursively build the tree with the given data from scratch using OMT algorithm
-	        var node = this._build(data.slice(), 0, data.length - 1, 0);
+	  /**
+	   * 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);
+	  },
 
-	        if (!this.data.children.length) {
-	            // save as is if tree is empty
-	            this.data = node;
+	  /**
+	   * 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();
+	  },
 
-	        } else if (this.data.height === node.height) {
-	            // split root if trees have the same height
-	            this._splitRoot(this.data, node);
+	  /**
+	   * 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();
+	  },
 
-	        } else {
-	            if (this.data.height < node.height) {
-	                // swap trees if inserted one is bigger
-	                var tmpNode = this.data;
-	                this.data = node;
-	                node = tmpNode;
-	            }
+	  /**
+	   * 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();
+	  },
 
-	            // insert the small tree into the large tree at appropriate level
-	            this._insert(node, this.data.height - node.height - 1, true);
-	        }
+	  /**
+	   * 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);
+	  },
 
-	        return this;
-	    },
+	  /**
+	   * 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;
+	  },
 
-	    insert: function (item) {
-	        if (item) { this._insert(item, this.data.height - 1); }
-	        return this;
-	    },
+	  /**
+	   * 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));
+	  },
 
-	    clear: function () {
-	        this.data = createNode$1([]);
-	        return this;
-	    },
+	  /**
+	   * 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;
+	  },
 
-	    remove: function (item, equalsFn) {
-	        if (!item) { return this; }
+	  /**
+	   * 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);
+	  },
 
-	        var node = this.data,
-	            bbox = this.toBBox(item),
-	            path = [],
-	            indexes = [],
-	            i, parent, index, goingUp;
+	  /**
+	   * 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);
+	  },
 
-	        // depth-first iterative tree traversal
-	        while (node || path.length) {
+	  /**
+	   * 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);
+	  },
 
-	            if (!node) { // go up
-	                node = path.pop();
-	                parent = path[path.length - 1];
-	                i = indexes.pop();
-	                goingUp = true;
-	            }
+	  /*
+	   * 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());
 
-	            if (node.leaf) { // check current node
-	                index = findItem$1(item, node.children, equalsFn);
+	    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);
+	 */
 
-	                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;
-	                }
-	            }
+	Point.convert = function (a) {
+	  if (a instanceof Point) {
+	    return a;
+	  }
 
-	            if (!goingUp && !node.leaf && contains$2(node, bbox)) { // go down
-	                path.push(node);
-	                indexes.push(i);
-	                i = 0;
-	                parent = node;
-	                node = node.children[0];
+	  if (Array.isArray(a)) {
+	    return new Point(a[0], a[1]);
+	  }
 
-	            } else if (parent) { // go right
-	                i++;
-	                node = parent.children[i];
-	                goingUp = false;
+	  return a;
+	};
 
-	            } else { node = null; } // nothing found
-	        }
+	var vectortilefeature = VectorTileFeature;
 
-	        return this;
-	    },
+	function VectorTileFeature(pbf, end, extent, keys, values) {
+	  // Public
+	  this.properties = {};
+	  this.extent = extent;
+	  this.type = 0; // Private
 
-	    toBBox: function (item) { return item; },
+	  this._pbf = pbf;
+	  this._geometry = -1;
+	  this._keys = keys;
+	  this._values = values;
+	  pbf.readFields(readFeature, this, end);
+	}
 
-	    compareMinX: compareNodeMinX$1,
-	    compareMinY: compareNodeMinY$1,
+	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;
+	}
 
-	    toJSON: function () { return this.data; },
+	function readTag(pbf, feature) {
+	  var end = pbf.readVarint() + pbf.pos;
 
-	    fromJSON: function (data) {
-	        this.data = data;
-	        return this;
-	    },
+	  while (pbf.pos < end) {
+	    var key = feature._keys[pbf.readVarint()],
+	        value = feature._values[pbf.readVarint()];
 
-	    _all: function (node, result) {
-	        var nodesToSearch = [];
-	        while (node) {
-	            if (node.leaf) { result.push.apply(result, node.children); }
-	            else { nodesToSearch.push.apply(nodesToSearch, node.children); }
+	    feature.properties[key] = value;
+	  }
+	}
 
-	            node = nodesToSearch.pop();
-	        }
-	        return result;
-	    },
+	VectorTileFeature.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
 
-	    _build: function (items, left, right, height) {
+	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;
 
-	        var N = right - left + 1,
-	            M = this._maxEntries,
-	            node;
+	  while (pbf.pos < end) {
+	    if (length <= 0) {
+	      var cmdLen = pbf.readVarint();
+	      cmd = cmdLen & 0x7;
+	      length = cmdLen >> 3;
+	    }
 
-	        if (N <= M) {
-	            // reached leaf level; return leaf
-	            node = createNode$1(items.slice(left, right + 1));
-	            calcBBox$1(node, this.toBBox);
-	            return node;
-	        }
+	    length--;
 
-	        if (!height) {
-	            // target height of the bulk-loaded tree
-	            height = Math.ceil(Math.log(N) / Math.log(M));
+	    if (cmd === 1 || cmd === 2) {
+	      x += pbf.readSVarint();
+	      y += pbf.readSVarint();
 
-	            // target number of root entries to maximize storage utilization
-	            M = Math.ceil(N / Math.pow(M, height - 1));
-	        }
+	      if (cmd === 1) {
+	        // moveTo
+	        if (line) lines.push(line);
+	        line = [];
+	      }
 
-	        node = createNode$1([]);
-	        node.leaf = false;
-	        node.height = height;
+	      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);
+	    }
+	  }
 
-	        // split the items into M mostly square tiles
+	  if (line) lines.push(line);
+	  return lines;
+	};
 
-	        var N2 = Math.ceil(N / M),
-	            N1 = N2 * Math.ceil(Math.sqrt(M)),
-	            i, j, right2, right3;
+	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;
 
-	        multiSelect$1(items, left, right, N1, this.compareMinX);
+	  while (pbf.pos < end) {
+	    if (length <= 0) {
+	      var cmdLen = pbf.readVarint();
+	      cmd = cmdLen & 0x7;
+	      length = cmdLen >> 3;
+	    }
 
-	        for (i = left; i <= right; i += N1) {
+	    length--;
 
-	            right2 = Math.min(i + N1 - 1, right);
+	    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);
+	    }
+	  }
 
-	            multiSelect$1(items, i, right2, N2, this.compareMinY);
+	  return [x1, y1, x2, y2];
+	};
 
-	            for (j = i; j <= right2; j += N2) {
+	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;
 
-	                right3 = Math.min(j + N2 - 1, right2);
+	  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];
+	    }
+	  }
 
-	                // pack each entry recursively
-	                node.children.push(this._build(items, j, right3, height - 1));
-	            }
-	        }
+	  switch (this.type) {
+	    case 1:
+	      var points = [];
 
-	        calcBBox$1(node, this.toBBox);
+	      for (i = 0; i < coords.length; i++) {
+	        points[i] = coords[i][0];
+	      }
 
-	        return node;
-	    },
+	      coords = points;
+	      project(coords);
+	      break;
 
-	    _chooseSubtree: function (bbox, node, level, path) {
+	    case 2:
+	      for (i = 0; i < coords.length; i++) {
+	        project(coords[i]);
+	      }
 
-	        var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
+	      break;
 
-	        while (true) {
-	            path.push(node);
+	    case 3:
+	      coords = classifyRings(coords);
 
-	            if (node.leaf || path.length - 1 === level) { break; }
+	      for (i = 0; i < coords.length; i++) {
+	        for (j = 0; j < coords[i].length; j++) {
+	          project(coords[i][j]);
+	        }
+	      }
 
-	            minArea = minEnlargement = Infinity;
+	      break;
+	  }
 
-	            for (i = 0, len = node.children.length; i < len; i++) {
-	                child = node.children[i];
-	                area = bboxArea$1(child);
-	                enlargement = enlargedArea$1(bbox, child) - area;
+	  if (coords.length === 1) {
+	    coords = coords[0];
+	  } else {
+	    type = 'Multi' + type;
+	  }
 
-	                // choose entry with the least area enlargement
-	                if (enlargement < minEnlargement) {
-	                    minEnlargement = enlargement;
-	                    minArea = area < minArea ? area : minArea;
-	                    targetNode = child;
+	  var result = {
+	    type: "Feature",
+	    geometry: {
+	      type: type,
+	      coordinates: coords
+	    },
+	    properties: this.properties
+	  };
 
-	                } else if (enlargement === minEnlargement) {
-	                    // otherwise choose one with the smallest area
-	                    if (area < minArea) {
-	                        minArea = area;
-	                        targetNode = child;
-	                    }
-	                }
-	            }
+	  if ('id' in this) {
+	    result.id = this.id;
+	  }
 
-	            node = targetNode || node.children[0];
-	        }
+	  return result;
+	}; // classifies an array of rings into polygons with outer rings and holes
 
-	        return node;
-	    },
 
-	    _insert: function (item, level, isNode) {
+	function classifyRings(rings) {
+	  var len = rings.length;
+	  if (len <= 1) return [rings];
+	  var polygons = [],
+	      polygon,
+	      ccw;
 
-	        var toBBox = this.toBBox,
-	            bbox = isNode ? item : toBBox(item),
-	            insertPath = [];
+	  for (var i = 0; i < len; i++) {
+	    var area = signedArea$1(rings[i]);
+	    if (area === 0) continue;
+	    if (ccw === undefined) ccw = area < 0;
 
-	        // find the best node for accommodating the item, saving all nodes along the path too
-	        var node = this._chooseSubtree(bbox, this.data, level, insertPath);
+	    if (ccw === area < 0) {
+	      if (polygon) polygons.push(polygon);
+	      polygon = [rings[i]];
+	    } else {
+	      polygon.push(rings[i]);
+	    }
+	  }
 
-	        // put the item into the node
-	        node.children.push(item);
-	        extend$3(node, bbox);
+	  if (polygon) polygons.push(polygon);
+	  return polygons;
+	}
 
-	        // 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; }
-	        }
+	function signedArea$1(ring) {
+	  var sum = 0;
 
-	        // adjust bboxes along the insertion path
-	        this._adjustParentBBoxes(bbox, insertPath, level);
-	    },
+	  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);
+	  }
 
-	    // split overflowed node into two
-	    _split: function (insertPath, level) {
+	  return sum;
+	}
 
-	        var node = insertPath[level],
-	            M = node.children.length,
-	            m = this._minEntries;
+	var vectortilelayer = VectorTileLayer;
 
-	        this._chooseSplitAxis(node, m, M);
+	function VectorTileLayer(pbf, end) {
+	  // Public
+	  this.version = 1;
+	  this.name = null;
+	  this.extent = 4096;
+	  this.length = 0; // Private
 
-	        var splitIndex = this._chooseSplitIndex(node, m, M);
+	  this._pbf = pbf;
+	  this._keys = [];
+	  this._values = [];
+	  this._features = [];
+	  pbf.readFields(readLayer, this, end);
+	  this.length = this._features.length;
+	}
 
-	        var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
-	        newNode.height = node.height;
-	        newNode.leaf = node.leaf;
+	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));
+	}
 
-	        calcBBox$1(node, this.toBBox);
-	        calcBBox$1(newNode, this.toBBox);
+	function readValueMessage(pbf) {
+	  var value = null,
+	      end = pbf.readVarint() + pbf.pos;
 
-	        if (level) { insertPath[level - 1].children.push(newNode); }
-	        else { this._splitRoot(node, newNode); }
-	    },
+	  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;
+	  }
 
-	    _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);
-	    },
+	  return value;
+	} // return feature `i` from this layer as a `VectorTileFeature`
 
-	    _chooseSplitIndex: function (node, m, M) {
 
-	        var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
+	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];
 
-	        minOverlap = minArea = Infinity;
+	  var end = this._pbf.readVarint() + this._pbf.pos;
 
-	        for (i = m; i <= M - m; i++) {
-	            bbox1 = distBBox$1(node, 0, i, this.toBBox);
-	            bbox2 = distBBox$1(node, i, M, this.toBBox);
+	  return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
+	};
 
-	            overlap = intersectionArea$1(bbox1, bbox2);
-	            area = bboxArea$1(bbox1) + bboxArea$1(bbox2);
+	var vectortile = VectorTile;
 
-	            // choose distribution with minimum overlap
-	            if (overlap < minOverlap) {
-	                minOverlap = overlap;
-	                index = i;
+	function VectorTile(pbf, end) {
+	  this.layers = pbf.readFields(readTile, {}, end);
+	}
 
-	                minArea = area < minArea ? area : minArea;
+	function readTile(tag, layers, pbf) {
+	  if (tag === 3) {
+	    var layer = new vectortilelayer(pbf, pbf.readVarint() + pbf.pos);
+	    if (layer.length) layers[layer.name] = layer;
+	  }
+	}
 
-	            } else if (overlap === minOverlap) {
-	                // otherwise choose distribution with minimum area
-	                if (area < minArea) {
-	                    minArea = area;
-	                    index = i;
-	                }
-	            }
-	        }
+	var VectorTile$1 = vectortile;
+	var VectorTileFeature$1 = vectortilefeature;
+	var VectorTileLayer$1 = vectortilelayer;
+	var vectorTile = {
+	  VectorTile: VectorTile$1,
+	  VectorTileFeature: VectorTileFeature$1,
+	  VectorTileLayer: VectorTileLayer$1
+	};
 
-	        return index;
-	    },
+	var tiler$7 = utilTiler().tileSize(512).margin(1);
+	var dispatch$8 = dispatch('loadedData');
 
-	    // sorts node children by the best axis for split
-	    _chooseSplitAxis: function (node, m, M) {
+	var _vtCache;
 
-	        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 abortRequest$7(controller) {
+	  controller.abort();
+	}
 
-	        // 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); }
-	    },
+	function vtToGeoJSON(data, tile, mergeCache) {
+	  var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
+	  var layers = Object.keys(vectorTile$1.layers);
 
-	    // total margin of all possible split distributions where each node is at least m full
-	    _allDistMargin: function (node, m, M, compare) {
+	  if (!Array.isArray(layers)) {
+	    layers = [layers];
+	  }
 
-	        node.children.sort(compare);
+	  var features = [];
+	  layers.forEach(function (layerID) {
+	    var layer = vectorTile$1.layers[layerID];
 
-	        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 (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
 
-	        for (i = m; i < M - m; i++) {
-	            child = node.children[i];
-	            extend$3(leftBBox, node.leaf ? toBBox(child) : child);
-	            margin += bboxMargin$1(leftBBox);
+	        if (geometry.type === 'Polygon') {
+	          geometry.type = 'MultiPolygon';
+	          geometry.coordinates = [geometry.coordinates];
 	        }
 
-	        for (i = M - m - 1; i >= m; i--) {
-	            child = node.children[i];
-	            extend$3(rightBBox, node.leaf ? toBBox(child) : child);
-	            margin += bboxMargin$1(rightBBox);
-	        }
+	        var isClipped = false; // Clip to tile bounds
 
-	        return margin;
-	    },
+	        if (geometry.type === 'MultiPolygon') {
+	          var featureClip = turf_bboxClip(feature, tile.extent.rectangle());
 
-	    _adjustParentBBoxes: function (bbox, path, level) {
-	        // adjust bboxes along the given tree path
-	        for (var i = level; i >= 0; i--) {
-	            extend$3(path[i], bbox);
-	        }
-	    },
+	          if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
+	            // feature = featureClip;
+	            isClipped = true;
+	          }
 
-	    _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 (!feature.geometry.coordinates.length) continue; // not actually on this tile
 
-	                } else { this.clear(); }
+	          if (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
+	        } // Generate some unique IDs and add some metadata
 
-	            } else { calcBBox$1(path[i], this.toBBox); }
-	        }
-	    },
 
-	    _initFormat: function (format) {
-	        // data format (minX, minY, maxX, maxY accessors)
+	        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
 
-	        // 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 (isClipped && geometry.type === 'MultiPolygon') {
+	          var merged = mergeCache[propertyhash];
 
-	        var compareArr = ['return a', ' - b', ';'];
+	          if (merged && merged.length) {
+	            var other = merged[0];
+	            var coords = union(feature.geometry.coordinates, other.geometry.coordinates);
 
-	        this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));
-	        this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));
+	            if (!coords || !coords.length) {
+	              continue; // something failed in martinez union
+	            }
 
-	        this.toBBox = new Function('a',
-	            'return {minX: a' + format[0] +
-	            ', minY: a' + format[1] +
-	            ', maxX: a' + format[2] +
-	            ', maxY: a' + format[3] + '};');
-	    }
-	};
+	            merged.push(feature);
 
-	function findItem$1(item, items, equalsFn) {
-	    if (!equalsFn) { return items.indexOf(item); }
+	            for (var j = 0; j < merged.length; j++) {
+	              // all these features get...
+	              merged[j].geometry.coordinates = coords; // same coords
 
-	    for (var i = 0; i < items.length; i++) {
-	        if (equalsFn(item, items[i])) { return i; }
+	              merged[j].__featurehash__ = featurehash; // same hash, so deduplication works
+	            }
+	          } else {
+	            mergeCache[propertyhash] = [feature];
+	          }
+	        }
+	      }
 	    }
-	    return -1;
+	  });
+	  return features;
 	}
 
-	// calculate node's bbox from bboxes of its children
-	function calcBBox$1(node, toBBox) {
-	    distBBox$1(node, 0, node.children.length, toBBox, node);
-	}
+	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);
+	    }
 
-	// 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;
+	    source.loaded[tile.id] = [];
+	    delete source.inflight[tile.id];
+	    return response.arrayBuffer();
+	  }).then(function (data) {
+	    if (!data) {
+	      throw new Error('No Data');
+	    }
 
-	    for (var i = k, child; i < p; i++) {
-	        child = node.children[i];
-	        extend$3(destNode, node.leaf ? toBBox(child) : child);
+	    var z = tile.xyz[2];
+
+	    if (!source.canMerge[z]) {
+	      source.canMerge[z] = {}; // initialize mergeCache
 	    }
 
-	    return destNode;
+	    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];
+	  });
 	}
 
-	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;
-	}
+	var serviceVectorTile = {
+	  init: function init() {
+	    if (!_vtCache) {
+	      this.reset();
+	    }
 
-	function compareNodeMinX$1(a, b) { return a.minX - b.minX; }
-	function compareNodeMinY$1(a, b) { return a.minY - b.minY; }
+	    this.event = utilRebind(this, dispatch$8, 'on');
+	  },
+	  reset: function reset() {
+	    for (var sourceID in _vtCache) {
+	      var source = _vtCache[sourceID];
 
-	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); }
+	      if (source && source.inflight) {
+	        Object.values(source.inflight).forEach(abortRequest$7);
+	      }
+	    }
 
-	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));
-	}
+	    _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 = [];
 
-	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);
+	    for (var i = 0; i < tiles.length; i++) {
+	      var features = source.loaded[tiles[i].id];
+	      if (!features || !features.length) continue;
 
-	    return Math.max(0, maxX - minX) *
-	           Math.max(0, maxY - minY);
-	}
+	      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 contains$2(a, b) {
-	    return a.minX <= b.minX &&
-	           a.minY <= b.minY &&
-	           b.maxX <= a.maxX &&
-	           b.maxY <= a.maxY;
-	}
+	        results.push(Object.assign({}, feature)); // shallow copy
+	      }
+	    }
 
-	function intersects$1(a, b) {
-	    return b.minX <= a.maxX &&
-	           b.minY <= a.maxY &&
-	           b.maxX >= a.minX &&
-	           b.maxY >= a.minY;
-	}
+	    return results;
+	  },
+	  loadTiles: function loadTiles(sourceID, template, projection) {
+	    var source = _vtCache[sourceID];
 
-	function createNode$1(children) {
-	    return {
-	        children: children,
-	        height: 1,
-	        leaf: true,
-	        minX: Infinity,
-	        minY: Infinity,
-	        maxX: -Infinity,
-	        maxY: -Infinity
-	    };
-	}
+	    if (!source) {
+	      source = this.addSource(sourceID, template);
+	    }
 
-	// 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 tiles = tiler$7.getTiles(projection); // abort inflight requests that are no longer needed
 
-	function multiSelect$1(arr, left, right, n, compare) {
-	    var stack = [left, right],
-	        mid;
+	    Object.keys(source.inflight).forEach(function (k) {
+	      var wanted = tiles.find(function (tile) {
+	        return k === tile.id;
+	      });
 
-	    while (stack.length) {
-	        right = stack.pop();
-	        left = stack.pop();
+	      if (!wanted) {
+	        abortRequest$7(source.inflight[k]);
+	        delete source.inflight[k];
+	      }
+	    });
+	    tiles.forEach(function (tile) {
+	      loadTile(source, tile);
+	    });
+	  },
+	  cache: function cache() {
+	    return _vtCache;
+	  }
+	};
 
-	        if (right - left <= n) { continue; }
+	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;
+	    }
 
-	        mid = left + Math.ceil((right - left) / n / 2) * n;
-	        quickselect$1(arr, mid, left, right, compare);
+	    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);
+	      }
 
-	        stack.push(left, mid, mid, right);
+	      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;
 	    }
-	}
-	rbush_1.default = _default$2;
 
-	var lineclip_1$1 = lineclip$1;
+	    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);
+	      }
 
-	lineclip$1.polyline = lineclip$1;
-	lineclip$1.polygon = polygonclip$1;
+	      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;
+	    }
 
+	    if (_wikidataCache[qid]) {
+	      if (callback) callback(null, _wikidataCache[qid]);
+	      return;
+	    }
 
-	// Cohen-Sutherland line clippign algorithm, adapted to efficiently
-	// handle polylines rather than just segments
+	    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);
+	      }
 
-	function lineclip$1(points, bbox, result) {
+	      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;
+	      }
 
-	    var len = points.length,
-	        codeA = bitCode$1(points[0], bbox),
-	        part = [],
-	        i, a, b, codeB, lastCode;
+	      var i;
+	      var description;
 
-	    if (!result) { result = []; }
+	      for (i in langs) {
+	        var code = langs[i];
 
-	    for (i = 1; i < len; i++) {
-	        a = points[i - 1];
-	        b = points[i];
-	        codeB = lastCode = bitCode$1(b, bbox);
+	        if (entity.descriptions[code] && entity.descriptions[code].language === code) {
+	          description = entity.descriptions[code];
+	          break;
+	        }
+	      }
 
-	        while (true) {
+	      if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-	            if (!(codeA | codeB)) { // accept
-	                part.push(a);
+	      var result = {
+	        title: entity.id,
+	        description: description ? description.value : '',
+	        descriptionLocaleCode: description ? description.language : '',
+	        editURL: 'https://www.wikidata.org/wiki/' + entity.id
+	      }; // add image
 
-	                if (codeB !== lastCode) { // segment went outside
-	                    part.push(b);
+	      if (entity.claims) {
+	        var imageroot = 'https://commons.wikimedia.org/w/index.php';
+	        var props = ['P154', 'P18']; // logo image, image
 
-	                    if (i < len - 1) { // start a new line
-	                        result.push(part);
-	                        part = [];
-	                    }
-	                } else if (i === len - 1) {
-	                    part.push(b);
-	                }
-	                break;
+	        var prop, image;
 
-	            } else if (codeA & codeB) { // trivial reject
-	                break;
+	        for (i = 0; i < props.length; i++) {
+	          prop = entity.claims[props[i]];
 
-	            } else if (codeA) { // a outside, intersect with clip edge
-	                a = intersect$1(a, b, codeA, bbox);
-	                codeA = bitCode$1(a, bbox);
+	          if (prop && Object.keys(prop).length > 0) {
+	            image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
 
-	            } else { // b outside
-	                b = intersect$1(a, b, codeB, bbox);
-	                codeB = bitCode$1(b, bbox);
+	            if (image) {
+	              result.imageURL = imageroot + '?' + utilQsString({
+	                title: 'Special:Redirect/file/' + image,
+	                width: 400
+	              });
+	              break;
 	            }
+	          }
 	        }
+	      }
 
-	        codeA = lastCode;
-	    }
+	      if (entity.sitelinks) {
+	        var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en'; // must be one of these that we requested..
 
-	    if (part.length) { result.push(part); }
+	        for (i = 0; i < langs.length; i++) {
+	          // check each, in order of preference
+	          var w = langs[i] + 'wiki';
 
-	    return result;
-	}
+	          if (entity.sitelinks[w]) {
+	            var title = entity.sitelinks[w].title;
+	            var tKey = 'inspector.wiki_reference';
 
-	// Sutherland-Hodgeman polygon clipping algorithm
+	            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 polygonclip$1(points, bbox) {
+	            result.wiki = {
+	              title: title,
+	              text: tKey,
+	              url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
+	            };
+	            break;
+	          }
+	        }
+	      }
+
+	      callback(null, result);
+	    });
+	  }
+	};
 
-	    var result, edge, prev, prevInside, i, p, inside;
+	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;
+	    }
 
-	    // 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);
+	    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');
+	      }
 
-	        for (i = 0; i < points.length; i++) {
-	            p = points[i];
-	            inside = !(bitCode$1(p, bbox) & edge);
+	      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;
+	    }
 
-	            // if segment goes through the clip window, add an intersection
-	            if (inside !== prevInside) { result.push(intersect$1(prev, p, edge, bbox)); }
+	    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');
+	      }
 
-	            if (inside) { result.push(p); } // add a point if it's inside
+	      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;
+	    }
 
-	            prev = p;
-	            prevInside = inside;
-	        }
+	    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');
+	      }
 
-	        points = result;
+	      if (callback) {
+	        var list = result.query.pages[Object.keys(result.query.pages)[0]];
+	        var translations = {};
 
-	        if (!points.length) { break; }
-	    }
+	        if (list && list.langlinks) {
+	          list.langlinks.forEach(function (d) {
+	            translations[d.lang] = d['*'];
+	          });
+	        }
 
-	    return result;
-	}
+	        callback(null, translations);
+	      }
+	    })["catch"](function (err) {
+	      if (callback) callback(err.message);
+	    });
+	  }
+	};
 
-	// intersect a segment against one of the 4 lines that make up the bbox
+	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
+	};
 
-	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;
+	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);
+	  };
 	}
 
-	// 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
+	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;
 
-	function bitCode$1(p, bbox) {
-	    var code = 0;
+	      if (osm && d.user) {
+	        selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
+	      }
 
-	    if (p[0] < bbox[0]) { code |= 1; } // left
-	    else if (p[0] > bbox[2]) { code |= 2; } // right
+	      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);
+	  }
 
-	    if (p[1] < bbox[1]) { code |= 4; } // bottom
-	    else if (p[1] > bbox[3]) { code |= 8; } // top
+	  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
 
-	    return code;
-	}
+	    _note.comments.forEach(function (d) {
+	      if (d.uid) uids[d.uid] = true;
+	    });
 
-	var whichPolygon_1 = whichPolygon;
+	    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 whichPolygon(data) {
-	    var bboxes = [];
-	    for (var i = 0; i < data.features.length; i++) {
-	        var feature = data.features[i];
-	        var coords = feature.geometry.coordinates;
+	  function localeDateString(s) {
+	    if (!s) return null;
+	    var options = {
+	      day: 'numeric',
+	      month: 'short',
+	      year: 'numeric'
+	    };
+	    s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
 
-	        if (feature.geometry.type === 'Polygon') {
-	            bboxes.push(treeItem(coords, feature.properties));
+	    var d = new Date(s);
+	    if (isNaN(d.getTime())) return null;
+	    return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+	  }
 
-	        } else if (feature.geometry.type === 'MultiPolygon') {
-	            for (var j = 0; j < coords.length; j++) {
-	                bboxes.push(treeItem(coords[j], feature.properties));
-	            }
-	        }
-	    }
+	  noteComments.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteComments;
+	  };
 
-	    var tree = rbush_1().load(bboxes);
+	  return noteComments;
+	}
 
-	    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;
-	    }
+	function uiNoteHeader() {
+	  var _note;
 
-	    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;
-	    };
+	  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');
+	      }
 
-	    return query;
-	}
+	      return _t('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t('note.closed') : '');
+	    });
+	  }
 
-	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;
-	}
+	  noteHeader.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteHeader;
+	  };
 
-	// 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; }
-	        }
-	    }
-	    return inside;
+	  return noteHeader;
 	}
 
-	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 uiNoteReport() {
+	  var _note;
 
-	function treeItem(coords, props) {
-	    var item = {
-	        minX: Infinity,
-	        minY: Infinity,
-	        maxX: -Infinity,
-	        maxY: -Infinity,
-	        coords: coords,
-	        props: props
-	    };
+	  function noteReport(selection) {
+	    var url;
 
-	    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]);
+	    if (services.osm && _note instanceof osmNote && !_note.isNew()) {
+	      url = services.osm.noteReportURL(_note);
 	    }
-	    return item;
-	}
 
-	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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-	var rawBorders = {
-	type: type,
-	features: features
-	};
+	    var link = selection.selectAll('.note-report').data(url ? [url] : []); // exit
 
-	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);
+	    link.exit().remove(); // 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'));
+	    linkEnter.append('span').html(_t.html('note.report'));
 	  }
-	  var geometryOnlyCollection = {
-	    type: 'RegionFeatureCollection',
-	    features: geometryFeatures
+
+	  noteReport.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteReport;
 	  };
-	  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;
-	      }
-	    }
-	  }
-	}
-	function locArray(loc) {
-	  if (Array.isArray(loc)) {
-	    return loc;
-	  } else if (loc.coordinates) {
-	    return loc.coordinates;
-	  }
-	  return loc.geometry.coordinates;
-	}
-	function smallestFeature(loc) {
-	  var query = locArray(loc);
-	  var featureProperties = whichPolygonGetter(query);
-	  if (!featureProperties) { return null; }
-	  return featuresByCode[featureProperties.id];
-	}
-	function countryFeature(loc) {
-	  var feature = smallestFeature(loc);
-	  if (!feature) { return null; }
-	  var countryCode = feature.properties.country || feature.properties.iso1A2;
-	  return featuresByCode[countryCode];
-	}
-	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;
-	  }
-	  return countryFeature(loc);
+
+	  return noteReport;
 	}
-	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;
+
+	function uiViewOnOSM(context) {
+	  var _what; // an osmEntity or osmNote
+
+
+	  function viewOnOSM(selection) {
+	    var url;
+
+	    if (_what instanceof osmEntity) {
+	      url = context.connection().entityURL(_what);
+	    } else if (_what instanceof osmNote) {
+	      url = context.connection().noteURL(_what);
 	    }
-	  } else {
-	    stringID = id.replace(idFilterRegex, '').toUpperCase();
-	  }
-	  return featuresByCode[stringID] || null;
-	}
-	function smallestOrMatchingFeature(query) {
-	  if (typeof query === 'object') {
-	    return smallestFeature(query);
-	  }
-	  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 = [];
-	  if (!strict || typeof query === 'object') {
-	    features.push(feature);
-	  }
-	  var properties = feature.properties;
-	  for (var i in properties.groups) {
-	    var groupID = properties.groups[i];
-	    features.push(featuresByCode[groupID]);
-	  }
-	  return features;
-	}
-	function roadSpeedUnit(query) {
-	  var feature = smallestOrMatchingFeature(query);
-	  return (feature && feature.properties.roadSpeedUnit) || null;
-	}
 
-	var _dataDeprecated;
-	var _nsi;
+	    var data = !_what || _what.isNew() ? [] : [_what];
+	    var link = selection.selectAll('.view-on-osm').data(data, function (d) {
+	      return d.id;
+	    }); // exit
+
+	    link.exit().remove(); // 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'));
+	    linkEnter.append('span').html(_t.html('inspector.view_on_osm'));
+	  }
+
+	  viewOnOSM.what = function (_) {
+	    if (!arguments.length) return _what;
+	    _what = _;
+	    return viewOnOSM;
+	  };
 
-	function validationOutdatedTags() {
-	  var type = 'outdated_tags';
-	  var nsiKeys = ['amenity', 'shop', 'tourism', 'leisure', 'office'];
+	  return viewOnOSM;
+	}
 
-	  // 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 uiNoteEditor(context) {
+	  var dispatch$1 = dispatch('change');
+	  var noteComments = uiNoteComments();
+	  var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);
 
-	  // 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: {}
-	      };
+	  var _note;
 
-	      // initialize name-suggestion-index matcher
-	      _nsi.matcher.buildMatchIndex(d.brands);
+	  var _newNote; // var _fieldsArr;
 
-	      // 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 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);
 	      });
+	    }
+	  }
 
-	      return _nsi;
-	    })
-	    .catch(function () { /* ignore */ });
+	  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;
+	    }); // exit
 
-	  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 []; }
+	    noteSave.exit().remove(); // enter
 
-	    // 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 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);
+	    // }
 
-	    // 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);
-	      }
-	    }
+	    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);
 
-	    // 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 (!commentTextarea.empty() && _newNote) {
+	      // autofocus the comment field for new notes
+	      commentTextarea.node().focus();
+	    } // update
+
+
+	    noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter
+
+	    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);
 	    }
 
-	    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];
+	    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
 	      }
-	      if (isBrand && !newTags.office) {       // but avoid doing this for corporate offices
-	        if (newTags.wikidata) {
-	          newTags['brand:wikidata'] = newTags.wikidata;
-	          delete newTags.wikidata;
-	        }
-	        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.
+
+	      noteSave.call(noteSaveButtons);
+	    }
+	  }
+
+	  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 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');
 	      }
 
-	      // 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; }
+	      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()
+	      }));
+	    });
+	  }
 
-	          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; }
+	  function noteSaveButtons(selection) {
+	    var osm = services.osm;
+	    var hasAuth = osm && osm.authenticated();
 
-	          // for now skip ambiguous matches (like Target~(USA) vs Target~(Australia))
-	          if (match.d) { continue; }
+	    var isSelected = _note && _note.id === context.selectedNoteID();
 
-	          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 buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	            var keepTags = ['takeaway'].reduce(function (acc, k) {
-	              if (newTags[k]) {
-	                acc[k] = newTags[k];
-	              }
-	              return acc;
-	            }, {});
+	    buttonSection.exit().remove(); // enter
 
-	            nsiKeys.forEach(function (k) { return delete newTags[k]; });
-	            Object.assign(newTags, brand.tags, keepTags);
-	            break;
-	          }
-	        }
-	      }
-	    }
+	    var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
 
-	    // determine diff
-	    var tagDiff = utilTagDiff(oldTags, newTags);
-	    if (!tagDiff.length) { return []; }
+	    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
 
-	    var isOnlyAddingTags = tagDiff.every(function (d) { return d.type === '+'; });
 
-	    var prefix = '';
-	    if (subtype === 'noncanonical_brand') {
-	      prefix = 'noncanonical_brand.';
-	    } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
-	      subtype = 'incomplete_tags';
-	      prefix = 'incomplete.';
+	    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);
+
+	    function isSaveDisabled(d) {
+	      return hasAuth && d.status === 'open' && d.newComment ? null : true;
 	    }
+	  }
 
-	    // don't allow autofixing brand tags
-	    var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;
+	  function clickCancel(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	    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 osm = services.osm;
 
+	    if (osm) {
+	      osm.removeNote(d);
+	    }
 
-	    function doUpgrade(graph) {
-	      var currEntity = graph.hasEntity(entity.id);
-	      if (!currEntity) { return graph; }
+	    context.enter(modeBrowse(context));
+	    dispatch$1.call('change');
+	  }
 
-	      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;
-	        }
-	      });
+	  function clickSave(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	      return actionChangeTags(currEntity.id, newTags)(graph);
+	    var osm = services.osm;
+
+	    if (osm) {
+	      osm.postNoteCreate(d, function (err, note) {
+	        dispatch$1.call('change', note);
+	      });
 	    }
+	  }
 
+	  function clickStatus(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	    function showMessage(context) {
-	      var currEntity = context.hasEntity(entity.id);
-	      if (!currEntity) { return ''; }
+	    var osm = services.osm;
 
-	      var messageID = "issues.outdated_tags." + prefix + "message";
-	      if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
-	        messageID += '_incomplete';
-	      }
-	      return _t(messageID, { feature: utilDisplayLabel(currEntity, context.graph()) });
+	    if (osm) {
+	      var setStatus = d.status === 'open' ? 'closed' : 'open';
+	      osm.postNoteUpdate(d, setStatus, function (err, note) {
+	        dispatch$1.call('change', note);
+	      });
 	    }
+	  }
 
+	  function clickComment(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button - #4641
 
-	    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; });
+	    var osm = services.osm;
+
+	    if (osm) {
+	      osm.postNoteUpdate(d, d.status, function (err, note) {
+	        dispatch$1.call('change', note);
+	      });
 	    }
 	  }
 
+	  noteEditor.note = function (val) {
+	    if (!arguments.length) return _note;
+	    _note = val;
+	    return noteEditor;
+	  };
 
-	  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 [];
-	    }
+	  noteEditor.newNote = function (val) {
+	    if (!arguments.length) return _newNote;
+	    _newNote = val;
+	    return noteEditor;
+	  };
 
-	    if (!multipolygon || !outerWay) { return []; }
+	  return utilRebind(noteEditor, dispatch$1, 'on');
+	}
 
-	    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'));
-	            }
-	          })
-	        ];
-	      }
-	    })];
+	function modeSelectNote(context, selectedNoteID) {
+	  var mode = {
+	    id: 'select-note',
+	    button: 'browse'
+	  };
 
+	  var _keybinding = utilKeybinding('select-note');
 
-	    function doUpgrade(graph) {
-	      var currMultipolygon = graph.hasEntity(multipolygon.id);
-	      var currOuterWay = graph.hasEntity(outerWay.id);
-	      if (!currMultipolygon || !currOuterWay) { return graph; }
+	  var _noteEditor = uiNoteEditor(context).on('change', function () {
+	    context.map().pan([0, 0]); // trigger a redraw
 
-	      currMultipolygon = currMultipolygon.mergeTags(currOuterWay.tags);
-	      graph = graph.replace(currMultipolygon);
-	      return actionChangeTags(currOuterWay.id, {})(graph);
-	    }
+	    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 _newFeature = false;
 
-	    function showMessage(context) {
-	      var currMultipolygon = context.hasEntity(multipolygon.id);
-	      if (!currMultipolygon) { return ''; }
+	  function checkSelectedID() {
+	    if (!services.osm) return;
+	    var note = services.osm.getNote(selectedNoteID);
 
-	      return _t('issues.old_multipolygon.message',
-	          { multipolygon: utilDisplayLabel(currMultipolygon, context.graph()) }
-	      );
+	    if (!note) {
+	      context.enter(modeBrowse(context));
 	    }
 
+	    return note;
+	  } // class the note as selected, or return to browse mode if the note is gone
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.old_multipolygon.reference'));
+
+	  function selectNote(d3_event, 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 = 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);
+	      context.selectedNoteID(selectedNoteID);
 	    }
 	  }
 
+	  function esc() {
+	    if (context.container().select('.combobox').size()) return;
+	    context.enter(modeBrowse(context));
+	  }
 
-	  var validation = function checkOutdatedTags(entity, graph) {
-	    var issues = oldMultipolygonIssues(entity, graph);
-	    if (!issues.length) { issues = oldTagIssues(entity, graph); }
-	    return issues;
+	  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;
+	  };
 
-	  validation.type = type;
+	  mode.enter = function () {
+	    var note = checkSelectedID();
+	    if (!note) return;
 
-	  return validation;
+	    _behaviors.forEach(context.install);
+
+	    _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
+
+	    sidebar.expand(sidebar.intersects(note.extent()));
+	    context.map().on('drawn.select', selectNote);
+	  };
+
+	  mode.exit = function () {
+	    _behaviors.forEach(context.uninstall);
+
+	    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);
+	  };
+
+	  return mode;
 	}
 
-	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 modeDragNote(context) {
+	  var mode = {
+	    id: 'drag-note',
+	    button: 'browse'
+	  };
+	  var edit = behaviorEdit(context);
 
-	    // 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
-	    };
+	  var _nudgeInterval;
 
-	    // 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 _lastLoc;
 
+	  var _note; // most current note.. dragged note may have stale datum.
 
-	    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];
-	            }
-	        }
+	  function startNudge(d3_event, nudge) {
+	    if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+	    _nudgeInterval = window.setInterval(function () {
+	      context.map().pan(nudge);
+	      doMove(d3_event, nudge);
+	    }, 50);
+	  }
 
-	        var tagDiff = utilTagDiff(tags, keepTags);
-	        if (!tagDiff.length) { return []; }
+	  function stopNudge() {
+	    if (_nudgeInterval) {
+	      window.clearInterval(_nudgeInterval);
+	      _nudgeInterval = null;
+	    }
+	  }
 
-	        var fixID = tagDiff.length === 1 ? 'remove_tag' : 'remove_tags';
+	  function origin(note) {
+	    return context.projection(note.loc);
+	  }
 
-	        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'));
-	                        }
-	                    })
-	                ];
-	            }
-	        })];
+	  function start(d3_event, 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);
+	    }
 
-	        function doUpgrade(graph) {
-	            var currEntity = graph.hasEntity(entity.id);
-	            if (!currEntity) { return graph; }
+	    context.surface().selectAll('.note-' + _note.id).classed('active', true);
+	    context.perform(actionNoop());
+	    context.enter(mode);
+	    context.selectedNoteID(_note.id);
+	  }
 
-	            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;
-	                }
-	            });
+	  function move(d3_event, entity, point) {
+	    d3_event.stopPropagation();
+	    _lastLoc = context.projection.invert(point);
+	    doMove(d3_event);
+	    var nudge = geoViewportEdge(point, context.map().dimensions());
 
-	            return actionChangeTags(currEntity.id, newTags)(graph);
-	        }
+	    if (nudge) {
+	      startNudge(d3_event, nudge);
+	    } else {
+	      stopNudge();
+	    }
+	  }
 
+	  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;
 
-	        function showMessage(context) {
-	            var currEntity = context.hasEntity(this.entityIds[0]);
-	            if (!currEntity) { return ''; }
+	    if (osm) {
+	      osm.replaceNote(_note); // update note cache
+	    }
 
-	            return _t('issues.private_data.contact.message',
-	                { feature: utilDisplayLabel(currEntity, context.graph()) }
-	            );
-	        }
+	    context.replace(actionNoop()); // trigger redraw
+	  }
 
+	  function end() {
+	    context.replace(actionNoop()); // trigger redraw
 
-	        function showReference(selection) {
-	            var enter = selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter();
+	    context.selectedNoteID(_note.id).enter(modeSelectNote(context, _note.id));
+	  }
 
-	            enter
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.private_data.reference'));
+	  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);
 
-	            enter
-	                .append('strong')
-	                .text(_t('issues.suggested'));
+	  mode.enter = function () {
+	    context.install(edit);
+	  };
 
-	            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; });
-	        }
-	    };
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
+	    context.uninstall(edit);
+	    context.surface().selectAll('.active').classed('active', false);
+	    stopNudge();
+	  };
+
+	  mode.behavior = drag;
+	  return mode;
+	}
+
+	function uiDataHeader() {
+	  var _datum;
 
+	  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'));
+	  }
 
-	    validation.type = type;
+	  dataHeader.datum = function (val) {
+	    if (!arguments.length) return _datum;
+	    _datum = val;
+	    return this;
+	  };
 
-	    return validation;
+	  return dataHeader;
 	}
 
-	var _discardNameRegexes = [];
+	// 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
+	//   }, ...]
 
-	function validationSuspiciousName() {
-	  var type = 'suspicious_name';
-	  var keysToTestForGenericValues = [
-	    'aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway',
-	    'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway'
-	  ];
+	var _comboHideTimerID;
 
-	  // 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.
+	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;
+	      });
+	    }));
+	  };
 
-	  _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 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
 
+	        input.node().focus(); // focus the input as if it was clicked
 
-	  function isDiscardedSuggestionName(lowercaseName) {
-	    return _discardNameRegexes.some(function (regex) { return regex.test(lowercaseName); });
-	  }
+	        mousedown(d3_event);
+	      }).on('mouseup.combo-caret', function (d3_event) {
+	        d3_event.preventDefault(); // don't steal focus from input
 
-	  // 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;
-	        }
+	        mouseup(d3_event);
+	      });
+	    });
+
+	    function mousedown(d3_event) {
+	      if (d3_event.button !== 0) return; // left click only
+
+	      _tDown = +new Date(); // 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);
 	    }
-	    return false;
-	  }
 
-	  function isGenericName(name, tags) {
-	    name = name.toLowerCase();
-	    return nameMatchesRawTag(name, tags) || isDiscardedSuggestionName(name);
-	  }
+	    function mouseup(d3_event) {
+	      input.on('mouseup.combo-input', null);
+	      if (d3_event.button !== 0) return; // left click only
 
-	  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')
-	              );
-	            }
-	          })
-	        ];
+	      if (input.node() !== document.activeElement) return; // exit if this input is not focused
+
+	      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();
 	      }
-	    });
+	    }
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.generic_name.reference'));
+	    function focus() {
+	      fetchComboData(''); // prefetch values (may warm taginfo cache)
 	    }
-	  }
 
-	  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')
-	              );
-	            }
-	          })
-	        ];
+	    function blur() {
+	      _comboHideTimerID = window.setTimeout(hide, 75);
+	    }
+
+	    function show() {
+	      hide(); // remove any existing
+
+	      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;
 	      }
-	    });
 
-	    function showReference(selection) {
-	      selection.selectAll('.issue-reference')
-	        .data([0])
-	        .enter()
-	        .append('div')
-	        .attr('class', 'issue-reference')
-	        .text(_t('issues.generic_name.reference'));
+	      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() : '';
 
-	  var validation = function checkGenericName(entity) {
-	    // a generic name is okay if it's a known brand or entity
-	    if (entity.hasWikidata()) { return []; }
+	      switch (d3_event.keyCode) {
+	        case 8: // ⌫ Backspace
 
-	    var issues = [];
-	    var notNames = (entity.tags['not:name'] || '').split(';');
+	        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;
 
-	    for (var key in entity.tags) {
-	      var m = key.match(/^name(?:(?::)([a-zA-Z_-]+))?$/);
-	      if (!m) { continue; }
+	        case 9:
+	          // ⇥ Tab
+	          accept();
+	          break;
 
-	      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;
+	        case 13:
+	          // ↩ Return
+	          d3_event.preventDefault();
+	          d3_event.stopPropagation();
+	          break;
+
+	        case 38:
+	          // ↑ Up arrow
+	          if (tagName === 'textarea' && !shown) return;
+	          d3_event.preventDefault();
+
+	          if (tagName === 'input' && !shown) {
+	            show();
 	          }
-	        }
-	      }
-	      if (isGenericName(value, entity.tags)) {
-	        issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
+
+	          nav(-1);
+	          break;
+
+	        case 40:
+	          // ↓ Down arrow
+	          if (tagName === 'textarea' && !shown) return;
+	          d3_event.preventDefault();
+
+	          if (tagName === 'input' && !shown) {
+	            show();
+	          }
+
+	          nav(+1);
+	          break;
 	      }
 	    }
 
-	    return issues;
-	  };
+	    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)
 
-	  validation.type = type;
 
-	  return validation;
-	}
+	    function change() {
+	      fetchComboData(value(), function () {
+	        _selected = null;
+	        var val = input.property('value');
 
-	function validationUnsquareWay(context) {
-	    var type = 'unsquare_way';
-	    var DEFAULT_DEG_THRESHOLD = 5;   // see also issues.js
+	        if (_suggestions.length) {
+	          if (input.property('selectionEnd') === val.length) {
+	            _selected = tryAutocomplete();
+	          }
 
-	    // use looser epsilon for detection to reduce warnings of buildings that are essentially square already
-	    var epsilon = 0.05;
-	    var nodeThreshold = 10;
+	          if (!_selected) {
+	            _selected = val;
+	          }
+	        }
 
-	    function isBuilding(entity, graph) {
-	        if (entity.type !== 'way' || entity.geometry(graph) !== 'area') { return false; }
-	        return entity.tags.building && entity.tags.building !== 'no';
-	    }
+	        if (val.length) {
+	          var combo = container.selectAll('.combobox');
 
+	          if (combo.empty()) {
+	            show();
+	          }
+	        } else {
+	          hide();
+	        }
 
-	    var validation = function checkUnsquareWay(entity, graph) {
+	        render();
+	      });
+	    } // Called when the user presses up/down arrows to navigate the list
 
-	        if (!isBuilding(entity, graph)) { return []; }
 
-	        // don't flag ways marked as physically unsquare
-	        if (entity.tags.nonsquare === 'yes') { return []; }
+	    function nav(dir) {
+	      if (_suggestions.length) {
+	        // try to determine previously selected index..
+	        var index = -1;
 
-	        var isClosed = entity.isClosed();
-	        if (!isClosed) { return []; }        // this building has bigger problems
+	        for (var i = 0; i < _suggestions.length; i++) {
+	          if (_selected && _suggestions[i].value === _selected) {
+	            index = i;
+	            break;
+	          }
+	        } // pick new _selected
 
-	        // 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
 
-	        // 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';
-	                });
-	            });
+	        index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
+	        _selected = _suggestions[index].value;
+	        input.property('value', _selected);
+	      }
+
+	      render();
+	      ensureVisible();
+	    }
+
+	    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
+
+
+	      var selected = combo.selectAll('.combobox-option.selected').node();
+
+	      if (selected) {
+	        selected.scrollIntoView({
+	          behavior: 'smooth',
+	          block: 'nearest'
 	        });
-	        if (hasConnectedSquarableWays) { return []; }
+	      }
+	    }
+
+	    function value() {
+	      var value = input.property('value');
+	      var start = input.property('selectionStart');
+	      var end = input.property('selectionEnd');
+
+	      if (start && end) {
+	        value = value.substring(0, start);
+	      }
 
+	      return value;
+	    }
 
-	        // user-configurable square threshold
-	        var storedDegreeThreshold = corePreferences('validate-square-degrees');
-	        var degreeThreshold = isNaN(storedDegreeThreshold) ? DEFAULT_DEG_THRESHOLD : parseFloat(storedDegreeThreshold);
+	    function fetchComboData(v, cb) {
+	      _cancelFetch = false;
 
-	        var points = nodes.map(function(node) { return context.projection(node.loc); });
-	        if (!geoOrthoCanOrthogonalize(points, isClosed, epsilon, degreeThreshold, true)) { return []; }
+	      _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;
+	        });
 
-	        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')];
+	        if (cb) {
+	          cb();
 	        }
+	      });
+	    }
 
-	        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);
-	                        }
-	                    }) ];
-	            }
-	        })];
+	    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 (!isNaN(parseFloat(val)) && isFinite(val)) return;
+	      var bestIndex = -1;
+
+	      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..
 
-	        function showReference(selection) {
-	            selection.selectAll('.issue-reference')
-	                .data([0])
-	                .enter()
-	                .append('div')
-	                .attr('class', 'issue-reference')
-	                .text(_t('issues.unsquare_way.buildings.reference'));
+	        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;
 	        }
-	    };
+	      }
+
+	      if (bestIndex !== -1) {
+	        var bestVal = _suggestions[bestIndex].value;
+	        input.property('value', bestVal);
+	        input.node().setSelectionRange(val.length, bestVal.length);
+	        return bestVal;
+	      }
+	    }
 
-	    validation.type = type;
+	    function render() {
+	      if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
+	        hide();
+	        return;
+	      }
 
-	    return validation;
-	}
+	      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
 
-	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
-	});
+	      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.
 
-	function coreValidator(context) {
-	    var dispatch$1 = dispatch('validated', 'focusedIssue');
-	    var validator = utilRebind({}, dispatch$1, 'on');
 
-	    var _rules = {};
-	    var _disabledRules = {};
+	    function accept(d3_event, d) {
+	      _cancelFetch = true;
+	      var thiz = input.node();
 
-	    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();
+	      if (d) {
+	        // user clicked on a suggestion
+	        utilGetSetValue(input, d.value); // replace field contents
 
-	    //
-	    // initialize the validator rulesets
-	    //
-	    validator.init = function() {
-	        Object.values(Validations).forEach(function(validation) {
-	            if (typeof validation !== 'function') { return; }
+	        utilTriggerEvent(input, 'change');
+	      } // clear (and keep) selection
 
-	            var fn = validation(context);
-	            var key = fn.type;
-	            _rules[key] = fn;
-	        });
 
-	        var disabledRules = corePreferences('validate-disabledRules');
-	        if (disabledRules) {
-	            disabledRules.split(',')
-	                .forEach(function(key) { _disabledRules[key] = true; });
-	        }
-	    };
+	      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.
 
 
-	    //
-	    // clear caches, called whenever iD resets after a save
-	    //
-	    validator.reset = function() {
-	        Array.from(_deferred).forEach(function(handle) {
-	            window.cancelIdleCallback(handle);
-	            _deferred.delete(handle);
-	        });
+	    function cancel() {
+	      _cancelFetch = true;
+	      var thiz = input.node(); // 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);
+	      dispatch$1.call('cancel', thiz);
+	      hide();
+	    }
+	  };
+
+	  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;
+	  };
+
+	  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;
+	  };
+
+	  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;
+	  };
+
+	  combobox.itemsMouseLeave = function (val) {
+	    if (!arguments.length) return _mouseLeaveHandler;
+	    _mouseLeaveHandler = val;
+	    return combobox;
+	  };
+
+	  return utilRebind(combobox, dispatch$1, 'on');
+	}
+
+	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);
+	};
+
+	// 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);
+	    });
+	  };
+	}
 
-	        // clear caches
-	        _ignoredIssueIDs = {};
-	        _baseCache = validationCache();
-	        _headCache = validationCache();
-	        _validatedGraph = null;
-	    };
+	function uiDisclosure(context, key, expandedDefault) {
+	  var dispatch$1 = dispatch('toggled');
 
-	    validator.resetIgnoredIssues = function() {
-	        _ignoredIssueIDs = {};
-	        // reload UI
-	        dispatch$1.call('validated');
-	    };
+	  var _expanded;
 
+	  var _label = utilFunctor('');
 
-	    // must update issues when the user changes the unsquare thereshold
-	    validator.reloadUnsquareIssues = function() {
+	  var _updatePreference = true;
 
-	        reloadUnsquareIssues(_headCache, context.graph());
-	        reloadUnsquareIssues(_baseCache, context.history().base());
+	  var _content = function _content() {};
 
-	        dispatch$1.call('validated');
-	    };
+	  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';
+	    }
 
-	    function reloadUnsquareIssues(cache, graph) {
+	    var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter
 
-	        var checkUnsquareWay = _rules.unsquare_way;
-	        if (typeof checkUnsquareWay !== 'function') { return; }
+	    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
 
-	        // uncache existing
-	        cache.uncacheIssuesOfType('unsquare_way');
+	    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
 
-	        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';
-	            });
+	    wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);
 
-	        // 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 (_expanded) {
+	      wrap.call(_content);
 	    }
 
-	    // 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;
-	                }
-	            }
+	    function toggle(d3_event) {
+	      d3_event.preventDefault();
+	      _expanded = !_expanded;
 
-	            if (opts.what === 'edited' && _baseCache.issuesByIssueID[issue.id]) { return false; }
+	      if (_updatePreference) {
+	        corePreferences('disclosure.' + key + '.expanded', _expanded);
+	      }
 
-	            if (opts.where === 'visible') {
-	                var extent = issue.extent(context.graph());
-	                if (!view.intersects(extent)) { return false; }
-	            }
+	      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));
 
-	            return true;
-	        });
-	    };
+	      if (_expanded) {
+	        wrap.call(_content);
+	      }
 
-	    validator.getResolvedIssues = function() {
-	        var baseIssues = Object.values(_baseCache.issuesByIssueID);
-	        return baseIssues.filter(function(issue) {
-	            return !_headCache.issuesByIssueID[issue.id];
-	        });
-	    };
+	      dispatch$1.call('toggled', this, _expanded);
+	    }
+	  };
 
-	    validator.focusIssue = function(issue) {
-	        var extent = issue.extent(context.graph());
+	  disclosure.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = utilFunctor(val);
+	    return disclosure;
+	  };
 
-	        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
-	            }
-	        }
-	    };
+	  disclosure.expanded = function (val) {
+	    if (!arguments.length) return _expanded;
+	    _expanded = val;
+	    return disclosure;
+	  };
 
+	  disclosure.updatePreference = function (val) {
+	    if (!arguments.length) return _updatePreference;
+	    _updatePreference = val;
+	    return disclosure;
+	  };
 
-	    validator.getIssuesBySeverity = function(options) {
-	        var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
-	        groups.error = groups.error || [];
-	        groups.warning = groups.warning || [];
-	        return groups;
-	    };
+	  disclosure.content = function (val) {
+	    if (!arguments.length) return _content;
+	    _content = val;
+	    return disclosure;
+	  };
 
-	    // 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) || [];
+	  return utilRebind(disclosure, dispatch$1, 'on');
+	}
 
-	        var opts = options || {};
+	// Can be labeled and collapsible.
 
-	        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; }
+	function uiSection(id, context) {
+	  var _classes = utilFunctor('');
 
-	                if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) { return false; }
-	                if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) { return false; }
+	  var _shouldDisplay;
 
-	                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;
-	                }
-	            });
-	    };
+	  var _content;
 
+	  var _disclosure;
 
-	    validator.getEntityIssues = function(entityID, options) {
-	        return validator.getSharedEntityIssues([entityID], options);
-	    };
+	  var _label;
 
+	  var _expandedByDefault = utilFunctor(true);
 
-	    validator.getRuleKeys = function() {
-	        return Object.keys(_rules);
-	    };
+	  var _disclosureContent;
 
+	  var _disclosureExpanded;
 
-	    validator.isRuleEnabled = function(key) {
-	        return !_disabledRules[key];
-	    };
+	  var _containerSelection = select(null);
 
+	  var section = {
+	    id: id
+	  };
 
-	    validator.toggleRule = function(key) {
-	        if (_disabledRules[key]) {
-	            delete _disabledRules[key];
-	        } else {
-	            _disabledRules[key] = true;
-	        }
+	  section.classes = function (val) {
+	    if (!arguments.length) return _classes;
+	    _classes = utilFunctor(val);
+	    return section;
+	  };
 
-	        corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-	        validator.validate();
-	    };
+	  section.label = function (val) {
+	    if (!arguments.length) return _label;
+	    _label = utilFunctor(val);
+	    return section;
+	  };
 
+	  section.expandedByDefault = function (val) {
+	    if (!arguments.length) return _expandedByDefault;
+	    _expandedByDefault = utilFunctor(val);
+	    return section;
+	  };
 
-	    validator.disableRules = function(keys) {
-	        _disabledRules = {};
-	        keys.forEach(function(k) {
-	            _disabledRules[k] = true;
-	        });
+	  section.shouldDisplay = function (val) {
+	    if (!arguments.length) return _shouldDisplay;
+	    _shouldDisplay = utilFunctor(val);
+	    return section;
+	  };
 
-	        corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-	        validator.validate();
-	    };
+	  section.content = function (val) {
+	    if (!arguments.length) return _content;
+	    _content = val;
+	    return section;
+	  };
 
+	  section.disclosureContent = function (val) {
+	    if (!arguments.length) return _disclosureContent;
+	    _disclosureContent = val;
+	    return section;
+	  };
 
-	    validator.ignoreIssue = function(id) {
-	        _ignoredIssueIDs[id] = true;
-	    };
+	  section.disclosureExpanded = function (val) {
+	    if (!arguments.length) return _disclosureExpanded;
+	    _disclosureExpanded = val;
+	    return section;
+	  }; // may be called multiple times
 
 
-	    //
-	    // Run validation on a single entity for the given graph
-	    //
-	    function validateEntity(entity, graph) {
-	        var entityIssues = [];
+	  section.render = function (selection) {
+	    _containerSelection = selection.selectAll('.section-' + id).data([0]);
 
-	        // runs validation and appends resulting issues
-	        function runValidation(key) {
+	    var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
 
-	            var fn = _rules[key];
-	            if (typeof fn !== 'function') {
-	                console.error('no such validation rule = ' + key);  // eslint-disable-line no-console
-	                return;
-	            }
+	    _containerSelection = sectionEnter.merge(_containerSelection);
 
-	            var detected = fn(entity, graph);
-	            entityIssues = entityIssues.concat(detected);
-	        }
+	    _containerSelection.call(renderContent);
+	  };
 
-	        // run all rules
-	        Object.keys(_rules).forEach(runValidation);
+	  section.reRender = function () {
+	    _containerSelection.call(renderContent);
+	  };
 
-	        return entityIssues;
-	    }
+	  section.selection = function () {
+	    return _containerSelection;
+	  };
 
-	    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);
+	  section.disclosure = function () {
+	    return _disclosure;
+	  }; // may be called multiple times
 
-	            var entity = graph.hasEntity(entityID);
-	            if (!entity) { return acc; }
 
-	            acc.add(entityID);
+	  function renderContent(selection) {
+	    if (_shouldDisplay) {
+	      var shouldDisplay = _shouldDisplay();
 
-	            var checkParentRels = [entity];
+	      selection.classed('hide', !shouldDisplay);
 
-	            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
-	                    });
-	                });
-	            }
+	      if (!shouldDisplay) {
+	        selection.html('');
+	        return;
+	      }
+	    }
 
-	            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);
-	                    });
-	                }
-	            });
+	    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);
+	      }
 
-	            return acc;
+	      if (_disclosureExpanded !== undefined) {
+	        _disclosure.expanded(_disclosureExpanded);
 
-	        }, new Set());
-	    }
+	        _disclosureExpanded = undefined;
+	      }
 
-	    //
-	    // Run validation for several entities, supplied `entityIDs`,
-	    // against `graph` for the given `cache`
-	    //
-	    function validateEntities(entityIDs, graph, cache) {
+	      selection.call(_disclosure);
+	      return;
+	    }
 
-	        // clear caches for existing issues related to these entities
-	        entityIDs.forEach(cache.uncacheEntityID);
+	    if (_content) {
+	      selection.call(_content);
+	    }
+	  }
 
-	        // detect new issues and update caches
-	        entityIDs.forEach(function(entityID) {
-	            var entity = graph.hasEntity(entityID);
-	            // don't validate deleted entities
-	            if (!entity) { return; }
+	  return section;
+	}
 
-	            var issues = validateEntity(entity, graph);
-	            cache.cacheIssues(issues);
-	        });
-	    }
+	// {
+	//   key: 'string',     // required
+	//   value: 'string'    // optional
+	// }
+	//   -or-
+	// {
+	//   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+	// }
+	//
 
+	function uiTagReference(what) {
+	  var wikibase = what.qid ? services.wikidata : services.osmWikibase;
+	  var tagReference = {};
 
-	    //
-	    // 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 _button = select(null);
 
-	        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;
+	  var _body = select(null);
 
-	        var createdAndModifiedEntityIDs = difference.extantIDs(true);   // created/modified (true = w/relation members)
-	        var entityIDsToCheck = entityIDsToValidate(createdAndModifiedEntityIDs, currGraph);
+	  var _loaded;
 
-	        // 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);
+	  var _showing;
 
-	        // concat the sets
-	        entityIDsToCheckForOldGraph.forEach(entityIDsToCheck.add, entityIDsToCheck);
+	  function load() {
+	    if (!wikibase) return;
 
-	        validateEntities(entityIDsToCheck, context.graph(), _headCache);
+	    _button.classed('tag-reference-loading', true);
 
-	        dispatch$1.call('validated');
-	    };
+	    wikibase.getDocs(what, gotDocs);
+	  }
 
+	  function gotDocs(err, docs) {
+	    _body.html('');
 
-	    // 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 (!docs || !docs.title) {
+	      _body.append('p').attr('class', 'tag-reference-description').html(_t.html('inspector.no_documentation_key'));
 
-	    // When user chages editing modes:
-	    context
-	        .on('exit.validator', validator.validate);
+	      done();
+	      return;
+	    }
 
-	    // 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);
+	    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();
+	    }
 
-	                var baseGraph = context.history().base();
-	                validateEntities(entityIDsToValidate(entityIDs, baseGraph), baseGraph, _baseCache);
+	    _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'));
 
-	                dispatch$1.call('validated');
-	            });
-	            _deferred.add(handle);
-	        });
+	    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
 
 
-	    return validator;
-	}
+	    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;
 
-	function validationCache() {
+	    _button.classed('tag-reference-loading', false);
 
-	    var cache = {
-	        issuesByIssueID: {},  // issue.id -> issue
-	        issuesByEntityID: {} // entity.id -> set(issue.id)
-	    };
+	    _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');
 
-	    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;
-	        });
-	    };
+	    _showing = true;
 
-	    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];
-	    };
+	    _button.selectAll('svg.icon use').each(function () {
+	      var iconUse = select(this);
 
-	    cache.uncacheIssues = function(issues) {
-	        issues.forEach(cache.uncacheIssue);
-	    };
+	      if (iconUse.attr('href') === '#iD-icon-info') {
+	        iconUse.attr('href', '#iD-icon-info-filled');
+	      }
+	    });
+	  }
 
-	    cache.uncacheIssuesOfType = function(type) {
-	        var issuesOfType = Object.values(cache.issuesByIssueID)
-	            .filter(function(issue) { return issue.type === type; });
-	        cache.uncacheIssues(issuesOfType);
-	    };
+	  function hide() {
+	    _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+	      _body.classed('expanded', false);
+	    });
 
-	    //
-	    // 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];
-	            }
-	        });
+	    _showing = false;
 
-	        delete cache.issuesByEntityID[entityID];
-	    };
+	    _button.selectAll('svg.icon use').each(function () {
+	      var iconUse = select(this);
 
-	    return cache;
-	}
+	      if (iconUse.attr('href') === '#iD-icon-info-filled') {
+	        iconUse.attr('href', '#iD-icon-info');
+	      }
+	    });
+	  }
 
-	function coreUploader(context) {
+	  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);
 
-	    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
+	    _button.on('click', function (d3_event) {
+	      d3_event.stopPropagation();
+	      d3_event.preventDefault();
+	      this.blur(); // avoid keeping focus on the button - #4641
 
-	        'willAttemptUpload', // dispatched before the actual upload call occurs, if it will
-	        'progressChanged',
+	      if (_showing) {
+	        hide();
+	      } else if (_loaded) {
+	        done();
+	      } else {
+	        load();
+	      }
+	    });
+	  };
 
-	        // 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
-	    );
+	  tagReference.body = function (selection) {
+	    var itemID = what.qid || what.key + '-' + (what.value || '');
+	    _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
+	      return d;
+	    });
 
-	    var _isSaving = false;
+	    _body.exit().remove();
 
-	    var _conflicts = [];
-	    var _errors = [];
-	    var _origChanges;
+	    _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);
 
-	    var _discardTags = {};
-	    _mainFileFetcher.get('discarded')
-	        .then(function(d) { _discardTags = d; })
-	        .catch(function() { /* ignore */ });
+	    if (_showing === false) {
+	      hide();
+	    }
+	  };
 
-	    var uploader = utilRebind({}, dispatch$1, 'on');
+	  tagReference.showing = function (val) {
+	    if (!arguments.length) return _showing;
+	    _showing = val;
+	    return tagReference;
+	  };
 
-	    uploader.isSaving = function() {
-	        return _isSaving;
-	    };
+	  return tagReference;
+	}
 
-	    uploader.save = function(changeset, tryAgain, checkConflicts) {
-	        // Guard against accidentally entering save code twice - #4641
-	        if (_isSaving && !tryAgain) {
-	            return;
-	        }
+	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 osm = context.connection();
-	        if (!osm) { return; }
+	  var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'
 
-	        // 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;
-	        }
 
-	        if (!_isSaving) {
-	            _isSaving = true;
-	            dispatch$1.call('saveStarted', this);
-	        }
+	  var _readOnlyTags = []; // the keys in the order we want them to display
 
-	        var history = context.history();
+	  var _orderedKeys = [];
+	  var _showBlank = false;
+	  var _pendingChange = null;
 
-	        _conflicts = [];
-	        _errors = [];
+	  var _state;
 
-	        // Store original changes, in case user wants to download them as an .osc file
-	        _origChanges = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	  var _presets;
 
-	        // 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 _tags;
 
-	        // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
-	        if (!checkConflicts) {
-	            upload(changeset);
+	  var _entityIDs;
 
-	        // Do the full (slow) conflict check..
-	        } else {
-	            performFullConflictCheck(changeset);
-	        }
+	  var _didInteract = false;
 
-	    };
+	  function interacted() {
+	    _didInteract = true;
+	  }
 
+	  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
 
-	    function performFullConflictCheck(changeset) {
+	    var all = Object.keys(_tags).sort();
+	    var missingKeys = utilArrayDifference(all, _orderedKeys);
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	    for (var i in missingKeys) {
+	      _orderedKeys.push(missingKeys[i]);
+	    } // assemble row data
 
-	        var history = context.history();
 
-	        var localGraph = context.graph();
-	        var remoteGraph = coreGraph(history.base(), true);
+	    var rowData = _orderedKeys.map(function (key, i) {
+	      return {
+	        index: i,
+	        key: key,
+	        value: _tags[key]
+	      };
+	    }); // append blank row last, if necessary
 
-	        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);
-	            }
-	        }
 
-	        var _toLoad = withChildNodes(_toCheck, localGraph);
-	        var _loaded = {};
-	        var _toLoadCount = 0;
-	        var _toLoadTotal = _toLoad.length;
+	    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
 
-	        if (_toCheck.length) {
-	            dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
-	            _toLoad.forEach(function(id) { _loaded[id] = false; });
-	            osm.loadMultiple(_toLoad, loaded);
-	        } else {
-	            upload(changeset);
-	        }
+	    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
 
-	        return;
+	    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
 
-	        function withChildNodes(ids, graph) {
-	            var s = new Set(ids);
-	            ids.forEach(function(id) {
-	                var entity = graph.entity(id);
-	                if (entity.type !== 'way') { return; }
+	    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
 
-	                graph.childNodes(entity).forEach(function(child) {
-	                    if (child.version !== undefined) {
-	                        s.add(child.id);
-	                    }
-	                });
-	            });
+	    addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+	    // Tag list items
 
-	            return Array.from(s);
-	        }
+	    var items = list.selectAll('.tag-row').data(rowData, function (d) {
+	      return d.key;
+	    });
+	    items.exit().each(unbind).remove(); // Enter
 
+	    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
 
-	        // Reload modified entities into an alternate graph and check for conflicts..
-	        function loaded(err, result) {
-	            if (_errors.length) { return; }
+	    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
 
-	            if (err) {
-	                _errors.push({
-	                    msg: err.message || err.responseText,
-	                    details: [ _t('save.status_code', { code: err.status }) ]
-	                });
-	                didResultInErrors();
+	      var value = row.select('input.value'); // propagate bound data
 
-	            } 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);
-	                            }
-	                        }
-	                    }
-	                });
+	      if (_entityIDs && taginfo && _state !== 'hover') {
+	        bindTypeahead(key, value);
+	      }
 
-	                _toLoadCount += result.data.length;
-	                _toLoadTotal += loadMore.length;
-	                dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+	      var referenceOptions = {
+	        key: d.key
+	      };
 
-	                if (loadMore.length) {
-	                    _toLoad.push.apply(_toLoad, loadMore);
-	                    osm.loadMultiple(loadMore, loaded);
-	                }
+	      if (typeof d.value === 'string') {
+	        referenceOptions.value = d.value;
+	      }
 
-	                if (!_toLoad.length) {
-	                    detectConflicts();
-	                    upload(changeset);
-	                }
-	            }
-	        }
+	      var reference = uiTagReference(referenceOptions);
 
+	      if (_state === 'hover') {
+	        reference.showing(false);
+	      }
 
-	        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);
-	            }
+	      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 sameVersions(local, remote) {
-	                if (local.version !== remote.version) { return false; }
+	  function isReadOnly(d) {
+	    for (var i = 0; i < _readOnlyTags.length; i++) {
+	      if (d.key.match(_readOnlyTags[i]) !== null) {
+	        return true;
+	      }
+	    }
 
-	                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; }
-	                    }
-	                }
+	    return false;
+	  }
 
-	                return true;
-	            }
+	  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');
+	  }
 
-	            _toCheck.forEach(function(id) {
-	                var local = localGraph.entity(id);
-	                var remote = remoteGraph.entity(id);
+	  function stringify(s) {
+	    return JSON.stringify(s).slice(1, -1); // without leading/trailing "
+	  }
 
-	                if (sameVersions(local, remote)) { return; }
+	  function unstringify(s) {
+	    var leading = '';
+	    var trailing = '';
 
-	                var merge = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags, formatUser);
+	    if (s.length < 1 || s.charAt(0) !== '"') {
+	      leading = '"';
+	    }
 
-	                history.replace(merge);
+	    if (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
+	      trailing = '"';
+	    }
 
-	                var mergeConflicts = merge.conflicts();
-	                if (!mergeConflicts.length) { return; }  // merged safely
+	    return JSON.parse(leading + s + trailing);
+	  }
 
-	                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 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');
 
-	                _conflicts.push({
-	                    id: id,
-	                    name: entityName(local),
-	                    details: mergeConflicts,
-	                    chosen: 1,
-	                    choices: [
-	                        choice(id, keepMine, forceLocal),
-	                        choice(id, keepTheirs, forceRemote)
-	                    ]
-	                });
-	            });
-	        }
+	    if (_state !== 'hover' && str.length) {
+	      return str + '\n';
 	    }
 
+	    return str;
+	  }
+
+	  function textChanged() {
+	    var newText = this.value.trim();
+	    var newTags = {};
+	    newText.split('\n').forEach(function (row) {
+	      var m = row.match(/^\s*([^=]+)=(.*)$/);
 
-	    function upload(changeset) {
-	        var osm = context.connection();
-	        if (!osm) {
-	            _errors.push({ msg: 'No OSM Service' });
-	        }
+	      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 || '';
+	      }
+	    });
 
-	        if (_conflicts.length) {
-	            didResultInConflicts(changeset);
+	    if (Object.keys(_pendingChange).length === 0) {
+	      _pendingChange = null;
+	      return;
+	    }
 
-	        } else if (_errors.length) {
-	            didResultInErrors();
+	    scheduleChange();
+	  }
 
-	        } else {
-	            var history = context.history();
-	            var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
-	            if (changes.modified.length || changes.created.length || changes.deleted.length) {
+	  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();
+	    }
+	  }
 
-	                dispatch$1.call('willAttemptUpload', this);
+	  function bindTypeahead(key, value) {
+	    if (isReadOnly(key.datum())) return;
 
-	                osm.putChangeset(changeset, changes, uploadCallback);
+	    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;
 
-	            } else {
-	                // changes were insignificant or reverted by user
-	                didResultInNoChanges();
-	            }
-	        }
+	        var data = _tags[keyString].filter(Boolean).map(function (tagValue) {
+	          return {
+	            value: tagValue,
+	            title: tagValue
+	          };
+	        });
+
+	        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));
+	      });
+	    }));
 
-	    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 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 {
-	            didResultInSuccess(changeset);
+	          other.push(data[i]);
 	        }
+	      }
+
+	      return sameletter.concat(other);
 	    }
+	  }
 
-	    function didResultInNoChanges() {
+	  function unbind() {
+	    var row = select(this);
+	    row.selectAll('input.key').call(uiCombobox.off, context);
+	    row.selectAll('input.value').call(uiCombobox.off, context);
+	  }
 
-	        dispatch$1.call('resultNoChanges', this);
+	  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
 
-	        endSave();
+	    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
 
-	        context.flush(); // reset iD
+	    if (isReadOnly({
+	      key: kNew
+	    })) {
+	      this.value = kOld;
+	      return;
 	    }
 
-	    function didResultInErrors() {
+	    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
 
-	        context.history().pop();
+	      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;
+	    }
 
-	        dispatch$1.call('resultErrors', this, _errors);
+	    var row = this.parentNode.parentNode;
+	    var inputVal = select(row).selectAll('input.value');
+	    var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
+	    _pendingChange = _pendingChange || {};
 
-	        endSave();
+	    if (kOld) {
+	      _pendingChange[kOld] = undefined;
 	    }
 
+	    _pendingChange[kNew] = vNew; // update the ordered key index so this row doesn't change position
+
+	    var existingKeyIndex = _orderedKeys.indexOf(kOld);
+
+	    if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
+	    d.key = kNew; // update datum to avoid exit/enter on tag update
+
+	    d.value = vNew;
+	    this.value = kNew;
+	    utilGetSetValue(inputVal, vNew);
+	    scheduleChange();
+	  }
+
+	  function valueChange(d3_event, d) {
+	    if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered
 
-	    function didResultInConflicts(changeset) {
+	    if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366
 
-	        _conflicts.sort(function(a, b) { return b.id.localeCompare(a.id); });
+	    if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
+	    _pendingChange = _pendingChange || {};
+	    _pendingChange[d.key] = context.cleanTagValue(this.value);
+	    scheduleChange();
+	  }
 
-	        dispatch$1.call('resultConflicts', this, changeset, _conflicts, _origChanges);
+	  function removeTag(d3_event, d) {
+	    if (isReadOnly(d)) return;
 
-	        endSave();
+	    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();
 	    }
+	  }
 
+	  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);
+	  }
+
+	  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
 
-	    function didResultInSuccess(changeset) {
+	    window.setTimeout(function () {
+	      if (!_pendingChange) return;
+	      dispatch$1.call('change', this, entityIDs, _pendingChange);
+	      _pendingChange = null;
+	    }, 10);
+	  }
 
-	        // delete the edit stack cached to local storage
-	        context.history().clearSaved();
+	  section.state = function (val) {
+	    if (!arguments.length) return _state;
 
-	        dispatch$1.call('resultSuccess', this, changeset);
+	    if (_state !== val) {
+	      _orderedKeys = [];
+	      _state = val;
+	    }
 
-	        // Add delay to allow for postgres replication #1646 #2678
-	        window.setTimeout(function() {
+	    return section;
+	  };
 
-	            endSave();
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets;
+	    _presets = val;
 
-	            context.flush(); // reset iD
-	        }, 2500);
+	    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);
 	    }
 
+	    return section;
+	  };
+
+	  section.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
+	    return section;
+	  };
 
-	    function endSave() {
-	        _isSaving = false;
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	        dispatch$1.call('saveEnded', this);
+	    if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _orderedKeys = [];
 	    }
 
+	    return section;
+	  }; // pass an array of regular expressions to test against the tag key
 
-	    uploader.cancelConflictResolution = function() {
-	        context.history().pop();
-	    };
 
+	  section.readOnlyTags = function (val) {
+	    if (!arguments.length) return _readOnlyTags;
+	    _readOnlyTags = val;
+	    return section;
+	  };
 
-	    uploader.processResolvedConflicts = function(changeset) {
-	        var history = context.history();
+	  return utilRebind(section, dispatch$1, 'on');
+	}
 
-	        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));
-	            }
-	        }
+	function uiDataEditor(context) {
+	  var dataHeader = uiDataHeader();
+	  var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);
 
-	        uploader.save(changeset, true, false);  // tryAgain = true, checkConflicts = false
-	    };
+	  var _datum;
 
+	  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
 
-	    uploader.reset = function() {
+	    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 uploader;
+	  return dataEditor;
 	}
 
-	var isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
+	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
 
-	// 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() {
+	  function selectData(d3_event, drawn) {
+	    var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
 
-	    isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
-	});
+	    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);
+	    }
+	  }
 
-	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 esc() {
+	    if (context.container().select('.combobox').size()) return;
+	    context.enter(modeBrowse(context));
+	  }
 
-	function vintageRange(vintage) {
-	    var s;
-	    if (vintage.start || vintage.end) {
-	        s = (vintage.start || '?');
-	        if (vintage.start !== vintage.end) {
-	            s += ' - ' + (vintage.end || '?');
-	        }
-	    }
-	    return s;
-	}
+	  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
 
-	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;
-	    };
+	    var extent = geoExtent(d3_geoBounds(selectedDatum));
+	    sidebar.expand(sidebar.intersects(extent));
+	    context.map().on('drawn.select-data', selectData);
+	  };
 
+	  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();
+	  };
 
-	    source.nudge = function(val, zoomlevel) {
-	        _offset[0] += val[0] / Math.pow(2, zoomlevel);
-	        _offset[1] += val[1] / Math.pow(2, zoomlevel);
-	        return source;
-	    };
+	  return mode;
+	}
 
+	function uiImproveOsmComments() {
+	  var _qaItem;
 
-	    source.name = function() {
-	        var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-	        return _t('imagery.' + id_safe + '.name', { default: _name });
-	    };
+	  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
 
-	    source.description = function() {
-	        var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-	        return _t('imagery.' + id_safe + '.description', { default: _description });
-	    };
+	      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');
+	        }
 
+	        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
+	    });
+	  }
 
-	    source.best = function() {
-	        return _best;
+	  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);
+	  }
 
-	    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;
-	    };
+	  issueComments.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return issueComments;
+	  };
 
+	  return issueComments;
+	}
 
-	    source.imageryUsed = function() {
-	        return name || source.id;
-	    };
+	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
 
+	    return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
+	  }
 
-	    source.template = function(val) {
-	        if (!arguments.length) { return _template; }
-	        if (source.id === 'custom') {
-	            _template = val;
-	        }
-	        return source;
-	    };
+	  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 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..
 
-	    source.url = function(coord) {
-	        var result = _template;
-	        if (result === '') { return result; }   // source 'none'
+	    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');
 
-	        // 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';
-	            }
+	        if (!osmlayer.enabled()) {
+	          osmlayer.enabled(true);
 	        }
 
+	        context.map().centerZoom(_qaItem.loc, 20);
 
-	        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 (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)
 
-	            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;
-	                case 'n':
-	                    return maxXminY.x;
-	                case 'e':
-	                    return minXmaxY.y;
-	                default:
-	                    return token;
-	              }
-	            });
+	      if (entity) {
+	        var name = utilDisplayName(entity); // try to use common name
 
-	        } 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 (!name && !isObjectLink) {
+	          var preset = _mainPresetIndex.match(entity, context.graph());
+	          name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
 	        }
 
-	        // 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 (name) {
+	          this.innerText = name;
+	        }
+	      }
+	    }); // Don't hide entities related to this error - #5880
 
+	    context.features().forceVisible(relatedEntities);
+	    context.map().pan([0, 0]); // trigger a redraw
+	  }
 
-	        return result;
-	    };
+	  improveOsmDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmDetails;
+	  };
 
+	  return improveOsmDetails;
+	}
 
-	    source.validZoom = function(z) {
-	        return source.zoomExtent[0] <= z &&
-	            (source.overzoom || source.zoomExtent[1] > z);
-	    };
+	function uiImproveOsmHeader() {
+	  var _qaItem;
 
+	  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
 
-	    source.isLocatorOverlay = function() {
-	        return source.id === 'mapbox_locator_overlay';
-	    };
+	    return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
+	  }
 
+	  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;
 
-	    /* 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';
-	    };
+	      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);
+	  }
 
+	  improveOsmHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmHeader;
+	  };
 
-	    source.copyrightNotices = function() {};
+	  return improveOsmHeader;
+	}
 
+	function uiImproveOsmEditor(context) {
+	  var dispatch$1 = dispatch('change');
+	  var qaDetails = uiImproveOsmDetails(context);
+	  var qaComments = uiImproveOsmComments();
+	  var qaHeader = uiImproveOsmHeader();
 
-	    source.getMetadata = function(center, tileCoord, callback) {
-	        var vintage = {
-	            start: localeDateString(source.startDate),
-	            end: localeDateString(source.endDate)
-	        };
-	        vintage.range = vintageRange(vintage);
+	  var _qaItem;
 
-	        var metadata = { vintage: vintage };
-	        callback(null, metadata);
-	    };
+	  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);
+	  }
 
+	  function improveOsmSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	    return source;
-	}
+	    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
 
+	    saveSection.exit().remove(); // enter
 
-	rendererBackgroundSource.Bing = function(data, dispatch) {
-	    // http://msdn.microsoft.com/en-us/library/ff701716.aspx
-	    // http://msdn.microsoft.com/en-us/library/ff701701.aspx
+	    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
 
-	    data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&mkt=en-gb&n=z';
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-	    var bing = rendererBackgroundSource(data);
-	    // var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc
-	    var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q';    // iD
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim();
 
+	      if (val === '') {
+	        val = undefined;
+	      } // store the unsaved comment with the issue itself
 
-	    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 */
-	        });
+	      _qaItem = _qaItem.update({
+	        newComment: val
+	      });
+	      var qaService = services.improveOSM;
 
+	      if (qaService) {
+	        qaService.replaceItem(_qaItem);
+	      }
 
-	    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(', ');
-	    };
+	      saveSection.call(qaSaveButtons);
+	    }
+	  }
 
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	    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 buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	        if (inflight[tileID]) { return; }
+	    buttonSection.exit().remove(); // enter
 
-	        if (!cache[tileID]) {
-	            cache[tileID] = {};
-	        }
-	        if (cache[tileID] && cache[tileID].metadata) {
-	            return callback(null, cache[tileID].metadata);
-	        }
+	    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
 
-	        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); }
-	            });
-	    };
+	    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
 
+	      var qaService = services.improveOSM;
 
-	    bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+	      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
 
+	      var qaService = services.improveOSM;
 
-	    return bing;
-	};
+	      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
 
+	      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
 
-	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';
-	    }
 
-	    var esri = rendererBackgroundSource(data);
-	    var cache = {};
-	    var inflight = {};
-	    var _prevCenter;
+	  improveOsmEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return improveOsmEditor;
+	  };
 
-	    // 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;
+	  return utilRebind(improveOsmEditor, dispatch$1, 'on');
+	}
 
-	        // tiles are available globally to zoom level 19, afterward they may or may not be present
-	        var z = 20;
+	function uiKeepRightDetails(context) {
+	  var _qaItem;
 
-	        // first generate a random url using the template
-	        var dummyUrl = esri.url([1,2,3]);
+	  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
 
-	        // 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)));
+	    var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);
 
-	        // 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';
+	    if (detail === unknown) {
+	      detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
+	    }
 
-	        // 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;
-	                    }
-	                }
+	    return detail;
+	  }
 
-	                // if any tiles are missing at level 20 we restrict maxZoom to 19
-	                esri.zoomExtent[1] = (hasTiles ? 22 : 19);
-	            })
-	            .catch(function() {
-	                /* ignore */
-	            });
-	    };
+	  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..
 
-	    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 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
 
-	        if (inflight[tileID]) { return; }
+	      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');
 
-	        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;
+	        if (!osmlayer.enabled()) {
+	          osmlayer.enabled(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/';
+	        context.map().centerZoomEase(_qaItem.loc, 20);
+
+	        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)
 
-	        url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
+	      if (entity) {
+	        var name = utilDisplayName(entity); // try to use common name
 
-	        if (!cache[tileID]) {
-	            cache[tileID] = {};
+	        if (!name && !isObjectLink) {
+	          var preset = _mainPresetIndex.match(entity, context.graph());
+	          name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
 	        }
-	        if (cache[tileID] && cache[tileID].metadata) {
-	            return callback(null, cache[tileID].metadata);
+
+	        if (name) {
+	          this.innerText = name;
 	        }
+	      }
+	    }); // Don't hide entities related to this issue - #5880
 
-	        // 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
-	            };
+	    context.features().forceVisible(relatedEntities);
+	    context.map().pan([0, 0]); // trigger a redraw
+	  }
 
-	            callback(null, metadata);
+	  keepRightDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightDetails;
+	  };
 
-	        } 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);
-	                    }
+	  return keepRightDetails;
+	}
 
-	                    // 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';
-	                    }
+	function uiKeepRightHeader() {
+	  var _qaItem;
 
-	                    cache[tileID].metadata = metadata;
-	                    if (callback) { callback(null, metadata); }
-	                })
-	                .catch(function(err) {
-	                    delete inflight[tileID];
-	                    if (callback) { callback(err.message); }
-	                });
-	        }
+	  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);
 
-	        function clean(val) {
-	            return String(val).trim() || unknown;
-	        }
-	    };
+	    if (title === unknown) {
+	      title = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
+	    }
 
-	    return esri;
-	};
+	    return title;
+	  }
 
+	  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);
+	  }
 
-	rendererBackgroundSource.None = function() {
-	    var source = rendererBackgroundSource({ id: 'none', template: '' });
+	  keepRightHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightHeader;
+	  };
 
+	  return keepRightHeader;
+	}
 
-	    source.name = function() {
-	        return _t('background.none');
-	    };
+	function uiViewOnKeepRight() {
+	  var _qaItem;
 
+	  function viewOnKeepRight(selection) {
+	    var url;
 
-	    source.imageryUsed = function() {
-	        return null;
-	    };
+	    if (services.keepRight && _qaItem instanceof QAItem) {
+	      url = services.keepRight.issueURL(_qaItem);
+	    }
 
+	    var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit
 
-	    source.area = function() {
-	        return -1;  // sources in background pane are sorted by area
-	    };
+	    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'));
+	    linkEnter.append('span').html(_t.html('inspector.view_on_keepRight'));
+	  }
 
-	    return source;
-	};
+	  viewOnKeepRight.what = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return viewOnKeepRight;
+	  };
 
+	  return viewOnKeepRight;
+	}
 
-	rendererBackgroundSource.Custom = function(template) {
-	    var source = rendererBackgroundSource({ id: 'custom', template: template });
+	function uiKeepRightEditor(context) {
+	  var dispatch$1 = dispatch('change');
+	  var qaDetails = uiKeepRightDetails(context);
+	  var qaHeader = uiKeepRightHeader();
 
+	  var _qaItem;
 
-	    source.name = function() {
-	        return _t('background.custom');
-	    };
+	  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));
+	  }
 
+	  function keepRightSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	    source.imageryUsed = function() {
-	        // sanitize personal connection tokens - #6801
-	        var cleaned = source.template();
+	    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
 
-	        // from query string parameters
-	        if (cleaned.indexOf('?') !== -1) {
-	            var parts = cleaned.split('?', 2);
-	            var qs = utilStringQs(parts[1]);
+	    saveSection.exit().remove(); // enter
 
-	            ['access_token', 'connectId', 'token'].forEach(function(param) {
-	                if (qs[param]) {
-	                    qs[param] = '{apikey}';
-	                }
-	            });
-	            cleaned = parts[0] + '?' + utilQsString(qs, true);  // true = soft encode
-	        }
+	    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
 
-	        // from wms/wmts api path parameters
-	        cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-	        return 'Custom (' + cleaned + ' )';
-	    };
+	    function changeInput() {
+	      var input = select(this);
+	      var val = input.property('value').trim();
 
+	      if (val === _qaItem.comment) {
+	        val = undefined;
+	      } // store the unsaved comment with the issue itself
 
-	    source.area = function() {
-	        return -2;  // sources in background pane are sorted by area
-	    };
 
+	      _qaItem = _qaItem.update({
+	        newComment: val
+	      });
+	      var qaService = services.keepRight;
 
-	    return source;
-	};
+	      if (qaService) {
+	        qaService.replaceItem(_qaItem); // update keepright cache
+	      }
 
-	function rendererTileLayer(context) {
-	    var transformProp = utilPrefixCSSProperty('Transform');
-	    var tiler = utilTiler();
+	      saveSection.call(qaSaveButtons);
+	    }
+	  }
 
-	    var _tileSize = 256;
-	    var _projection;
-	    var _cache = {};
-	    var _tileOrigin;
-	    var _zoom;
-	    var _source;
+	  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
 
-	    function tileSizeAtZoom(d, z) {
-	        var EPSILON = 0.002;    // close seams
-	        return ((_tileSize * Math.pow(2, z - d[2])) / _tileSize) + EPSILON;
-	    }
+	    buttonSection.exit().remove(); // enter
 
+	    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
 
-	    function atZoom(t, distance) {
-	        var power = Math.pow(2, distance);
-	        return [
-	            Math.floor(t[0] * power),
-	            Math.floor(t[1] * power),
-	            t[2] + distance
-	        ];
-	    }
+	    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;
 
-	    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 (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
 
+	      var qaService = services.keepRight;
 
-	    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 (qaService) {
+	        d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)
 
+	        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
 
-	    function addSource(d) {
-	        d.push(_source.url(d));
-	        return d;
-	    }
+	      var qaService = services.keepRight;
 
+	      if (qaService) {
+	        d.newStatus = 'ignore'; // ignore permanently (false positive)
 
-	    // Update tiles based on current state of `projection`.
-	    function background(selection) {
-	        _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+	        qaService.postUpdate(d, function (err, item) {
+	          return dispatch$1.call('change', item);
+	        });
+	      }
+	    });
+	  } // NOTE: Don't change method name until UI v3 is merged
 
-	        var pixelOffset;
-	        if (_source) {
-	            pixelOffset = [
-	                _source.offset()[0] * Math.pow(2, _zoom),
-	                _source.offset()[1] * Math.pow(2, _zoom)
-	            ];
-	        } else {
-	            pixelOffset = [0, 0];
-	        }
 
-	        var translate = [
-	            _projection.translate()[0] + pixelOffset[0],
-	            _projection.translate()[1] + pixelOffset[1]
-	        ];
+	  keepRightEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return keepRightEditor;
+	  };
 
-	        tiler
-	            .scale(_projection.scale() * 2 * Math.PI)
-	            .translate(translate);
+	  return utilRebind(keepRightEditor, dispatch$1, 'on');
+	}
 
-	        _tileOrigin = [
-	            _projection.scale() * Math.PI - translate[0],
-	            _projection.scale() * Math.PI - translate[1]
-	        ];
+	function uiOsmoseDetails(context) {
+	  var _qaItem;
 
-	        render(selection);
-	    }
+	  function issueString(d, type) {
+	    if (!d) return ''; // Issue strings are cached from Osmose API
 
+	    var s = services.osmose.getStrings(d.itemType);
+	    return type in s ? s[type] : '';
+	  }
 
-	    // 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;
+	  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 (_source.validZoom(_zoom)) {
-	            tiler.skipNullIsland(!!_source.overlay);
+	    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)
 
-	            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)));
-	                }
-	            });
 
-	            requests = uniqueBy(requests, 3).filter(function(r) {
-	                // don't re-request tiles which have failed in the past
-	                return _cache[r[3]] !== false;
-	            });
-	        }
+	    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)
 
-	        function load(d) {
-	            _cache[d[3]] = true;
-	            select(this)
-	                .on('error', null)
-	                .on('load', null)
-	                .classed('tile-loaded', true);
-	            render(selection);
-	        }
+	    if (issueString(_qaItem, 'fix')) {
+	      var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-	        function error(d) {
-	            _cache[d[3]] = false;
-	            select(this)
-	                .on('error', null)
-	                .on('load', null)
-	                .remove();
-	            render(selection);
-	        }
+	      _div.append('h4').html(_t.html('QA.osmose.fix_title'));
 
-	        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 + ')';
-	        }
+	      _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 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))
-	            ];
-	        }
 
-	        function debugTransform(d) {
-	            var coord = tileCenter(d);
-	            return 'translate(' + coord[0] + 'px,' + coord[1] + 'px)';
-	        }
+	    if (issueString(_qaItem, 'trap')) {
+	      var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
+	      _div2.append('h4').html(_t.html('QA.osmose.trap_title'));
 
-	        // 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;
+	      _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
 
-	        requests.forEach(function(d) {
-	            var c = tileCenter(d);
-	            var dist = geoVecLength(c, mapCenter);
-	            if (dist < minDist) {
-	                minDist = dist;
-	                nearCenter = d;
-	            }
-	        });
 
+	    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
 
-	        var image = selection.selectAll('img')
-	            .data(requests, function(d) { return d[3]; });
+	      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
 
-	        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);
-	            });
+	      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
 
-	        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')
-	                        );
-	                    });
-	                });
-	        }
 
-	    }
+	      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);
 
-	    background.projection = function(val) {
-	        if (!arguments.length) { return _projection; }
-	        _projection = val;
-	        return background;
-	    };
+	          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
 
-	    background.dimensions = function(val) {
-	        if (!arguments.length) { return tiler.size(); }
-	        tiler.size(val);
-	        return background;
-	    };
+	          if (!name) {
+	            var preset = _mainPresetIndex.match(entity, context.graph());
+	            name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+	          }
 
+	          if (name) {
+	            this.innerText = name;
+	          }
+	        }
+	      }); // Don't hide entities related to this issue - #5880
 
-	    background.source = function(val) {
-	        if (!arguments.length) { return _source; }
-	        _source = val;
-	        _tileSize = _source.tileSize;
-	        _cache = {};
-	        tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
-	        return background;
-	    };
+	      context.features().forceVisible(d.elems);
+	      context.map().pan([0, 0]); // trigger a redraw
+	    })["catch"](function (err) {
+	      console.log(err); // eslint-disable-line no-console
+	    });
+	  }
 
+	  osmoseDetails.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseDetails;
+	  };
 
-	    return background;
+	  return osmoseDetails;
 	}
 
-	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 uiOsmoseHeader() {
+	  var _qaItem;
 
-	  function ensureImageryIndex() {
-	    return _mainFileFetcher.get('imagery')
-	      .then(function (sources) {
-	        if (_imageryIndex) { return _imageryIndex; }
+	  function issueTitle(d) {
+	    var unknown = _t('inspector.unknown');
+	    if (!d) return unknown; // Issue titles supplied by Osmose
 
-	        _imageryIndex = {
-	          imagery: sources,
-	          features: {}
-	        };
+	    var s = services.osmose.getStrings(d.itemType);
+	    return 'title' in s ? s.title : unknown;
+	  }
 
-	        // 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]; });
+	  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;
 
-	          var feature = {
-	            type: 'Feature',
-	            properties: { id: source.id },
-	            geometry: { type: 'MultiPolygon', coordinates: rings }
-	          };
+	      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);
+	  }
 
-	          _imageryIndex.features[source.id] = feature;
-	          return feature;
+	  osmoseHeader.issue = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseHeader;
+	  };
 
-	        }).filter(Boolean);
+	  return osmoseHeader;
+	}
 
-	        _imageryIndex.query = whichPolygon_1({ type: 'FeatureCollection', features: features });
+	function uiViewOnOsmose() {
+	  var _qaItem;
 
+	  function viewOnOsmose(selection) {
+	    var url;
 
-	        // 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);
-	          }
-	        });
+	    if (services.osmose && _qaItem instanceof QAItem) {
+	      url = services.osmose.itemURL(_qaItem);
+	    }
 
-	        // Add 'None'
-	        _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None());
+	    var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit
 
-	        // Add 'Custom'
-	        var template = corePreferences('background-custom-template') || '';
-	        var custom = rendererBackgroundSource.Custom(template);
-	        _imageryIndex.backgrounds.unshift(custom);
+	    link.exit().remove(); // enter
 
-	        return _imageryIndex;
-	      });
+	    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'));
 	  }
 
+	  viewOnOsmose.what = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return viewOnOsmose;
+	  };
 
-	  function background(selection) {
-	    var currSource = baseLayer.source();
+	  return viewOnOsmose;
+	}
 
-	    // 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);
-	      }
-	    }
+	function uiOsmoseEditor(context) {
+	  var dispatch$1 = dispatch('change');
+	  var qaDetails = uiOsmoseDetails(context);
+	  var qaHeader = uiOsmoseHeader();
 
-	    // 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;
+	  var _qaItem;
 
-	    if (wasValid !== _isValid) {      // change in valid status
-	      background.updateImagery();
-	    }
+	  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));
+	  }
 
+	  function osmoseSaveSection(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	    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)";
-	      }
-	    }
+	    var isShown = _qaItem && isSelected;
+	    var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+	      return "".concat(d.id, "-").concat(d.status || 0);
+	    }); // exit
 
-	    var base = selection.selectAll('.layer-background')
-	      .data([0]);
+	    saveSection.exit().remove(); // enter
 
-	    base = base.enter()
-	      .insert('div', '.layer-data')
-	      .attr('class', 'layer layer-background')
-	      .merge(base);
+	    var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update
 
-	    if (detected.cssfilters) {
-	      base.style('filter', baseFilter || null);
-	    } else {
-	      base.style('opacity', _brightness);
-	    }
+	    saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+	  }
 
+	  function qaSaveButtons(selection) {
+	    var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-	    var imagery = base.selectAll('.layer-imagery')
-	      .data([0]);
+	    var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
-	    imagery.enter()
-	      .append('div')
-	      .attr('class', 'layer layer-imagery')
-	      .merge(imagery)
-	      .call(baseLayer);
+	    buttonSection.exit().remove(); // enter
 
+	    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
 
-	    var maskFilter = '';
-	    var mixBlendMode = '';
-	    if (detected.cssfilters && _sharpness > 1) {  // apply unsharp mask
-	      mixBlendMode = 'overlay';
-	      maskFilter = 'saturate(0) blur(3px) invert(1)';
+	    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 contrast = _sharpness - 1;
-	      maskFilter += " contrast(" + contrast + ")";
+	      var qaService = services.osmose;
 
-	      var brightness = d3_interpolateNumber(1, 0.85)(_sharpness - 1);
-	      maskFilter += " brightness(" + brightness + ")";
-	    }
+	      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
 
-	    var mask = base.selectAll('.layer-unsharp-mask')
-	      .data(detected.cssfilters && _sharpness > 1 ? [0] : []);
+	      var qaService = services.osmose;
 
-	    mask.exit()
-	      .remove();
+	      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
 
-	    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);
 
+	  osmoseEditor.error = function (val) {
+	    if (!arguments.length) return _qaItem;
+	    _qaItem = val;
+	    return osmoseEditor;
+	  };
 
-	    var overlays = selection.selectAll('.layer-overlay')
-	      .data(_overlayLayers, function (d) { return d.source().name(); });
+	  return utilRebind(osmoseEditor, dispatch$1, 'on');
+	}
 
-	    overlays.exit()
-	      .remove();
+	function modeSelectError(context, selectedErrorID, selectedErrorService) {
+	  var mode = {
+	    id: 'select-error',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('select-error');
+	  var errorService = services[selectedErrorService];
+	  var errorEditor;
 
-	    overlays.enter()
-	      .insert('div', '.layer-data')
-	      .attr('class', 'layer layer-overlay')
-	      .merge(overlays)
-	      .each(function (layer, i, nodes) { return select(nodes[i]).call(layer); });
-	  }
+	  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;
 
-	  background.updateImagery = function() {
-	    var currSource = baseLayer.source();
-	    if (context.inIntro() || !currSource) { return; }
+	    case 'keepRight':
+	      errorEditor = uiKeepRightEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
-	    var o = _overlayLayers
-	      .filter(function (d) { return !d.source().isLocatorOverlay() && !d.source().isHidden(); })
-	      .map(function (d) { return d.source().id; })
-	      .join(',');
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
 
-	    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);
+	    case 'osmose':
+	      errorEditor = uiOsmoseEditor(context).on('change', function () {
+	        context.map().pan([0, 0]); // trigger a redraw
 
-	    var id = currSource.id;
-	    if (id === 'custom') {
-	      id = "custom:" + (currSource.template());
-	    }
+	        var error = checkSelectedID();
+	        if (!error) return;
+	        context.ui().sidebar.show(errorEditor.error(error));
+	      });
+	      break;
+	  }
 
-	    if (id) {
-	      hash.background = id;
-	    } else {
-	      delete hash.background;
-	    }
+	  var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
 
-	    if (o) {
-	      hash.overlays = o;
-	    } else {
-	      delete hash.overlays;
-	    }
+	  function checkSelectedID() {
+	    if (!errorService) return;
+	    var error = errorService.getError(selectedErrorID);
 
-	    if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
-	      hash.offset = x + "," + y;
-	    } else {
-	      delete hash.offset;
+	    if (!error) {
+	      context.enter(modeBrowse(context));
 	    }
 
-	    if (!window.mocha) {
-	      window.location.replace('#' + utilQsString(hash, true));
-	    }
+	    return error;
+	  }
 
-	    var imageryUsed = [];
-	    var photoOverlaysUsed = [];
+	  mode.zoomToSelected = function () {
+	    if (!errorService) return;
+	    var error = errorService.getError(selectedErrorID);
 
-	    var currUsed = currSource.imageryUsed();
-	    if (currUsed && _isValid) {
-	      imageryUsed.push(currUsed);
+	    if (error) {
+	      context.map().centerZoomEase(error.loc, 20);
 	    }
+	  };
 
-	    _overlayLayers
-	      .filter(function (d) { return !d.source().isLocatorOverlay() && !d.source().isHidden(); })
-	      .forEach(function (d) { return imageryUsed.push(d.source().imageryUsed()); });
+	  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 dataLayer = context.layers().layer('data');
-	    if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
-	      imageryUsed.push(dataLayer.getSrc());
-	    }
+	    function selectError(d3_event, drawn) {
+	      if (!checkSelectedID()) return;
+	      var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
 
-	    var photoOverlayLayers = {
-	      streetside: 'Bing Streetside',
-	      mapillary: 'Mapillary Images',
-	      'mapillary-map-features': 'Mapillary Map Features',
-	      'mapillary-signs': 'Mapillary Signs',
-	      openstreetcam: 'OpenStreetCam Images'
-	    };
+	      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;
 
-	    for (var layerID in photoOverlayLayers) {
-	      var layer = context.layers().layer(layerID);
-	      if (layer && layer.enabled()) {
-	        photoOverlaysUsed.push(layerID);
-	        imageryUsed.push(photoOverlayLayers[layerID]);
+	        if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+	          context.enter(modeBrowse(context));
+	        }
+	      } else {
+	        selection.classed('selected', true);
+	        context.selectedErrorID(selectedErrorID);
 	      }
 	    }
 
-	    context.history().imageryUsed(imageryUsed);
-	    context.history().photoOverlaysUsed(photoOverlaysUsed);
+	    function esc() {
+	      if (context.container().select('.combobox').size()) return;
+	      context.enter(modeBrowse(context));
+	    }
 	  };
 
+	  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([]);
+	  };
 
-	  background.sources = function (extent, zoom, includeCurrent) {
-	    if (!_imageryIndex) { return []; }   // called before init()?
+	  return mode;
+	}
 
-	    var visible = {};
-	    (_imageryIndex.query.bbox(extent.rectangle(), true) || [])
-	      .forEach(function (d) { return visible[d.id] = true; });
+	function behaviorSelect(context) {
+	  var _tolerancePx = 4; // see also behaviorDrag
 
-	    var currSource = baseLayer.source();
+	  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
 
-	    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
-	    });
-	  };
+	  var _multiselectionPointerId = null; // use pointer events on supported platforms; fallback to mouse events
 
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	  background.dimensions = function (val) {
-	    if (!val) { return; }
-	    baseLayer.dimensions(val);
-	    _overlayLayers.forEach(function (layer) { return layer.dimensions(val); });
-	  };
+	  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;
+	    }
 
+	    if (d3_event.keyCode === 93 || // context menu key
+	    d3_event.keyCode === 32) {
+	      // spacebar
+	      d3_event.preventDefault();
+	    }
 
-	  background.baseLayerSource = function(d) {
-	    if (!arguments.length) { return baseLayer.source(); }
+	    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
 
-	    // test source against OSM imagery blacklists..
-	    var osm = context.connection();
-	    if (!osm) { return background; }
+	    cancelLongPress();
 
-	    var blacklists = osm.imageryBlacklists();
-	    var template = d.template();
-	    var fail = false;
-	    var tested = 0;
-	    var regex;
+	    if (d3_event.shiftKey) {
+	      context.surface().classed('behavior-multiselect', true);
+	    }
 
-	    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 */
+	    if (d3_event.keyCode === 32) {
+	      // spacebar
+	      if (!_downPointers.spacebar && _lastMouseEvent) {
+	        cancelLongPress();
+	        _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
+	        _downPointers.spacebar = {
+	          firstEvent: _lastMouseEvent,
+	          lastEvent: _lastMouseEvent
+	        };
 	      }
 	    }
+	  }
 
-	    // ensure at least one test was run.
-	    if (!tested) {
-	      regex = new RegExp('.*\.google(apis)?\..*/(vt|kh)[\?/].*([xyz]=.*){3}.*');
-	      fail = regex.test(template);
+	  function keyup(d3_event) {
+	    cancelLongPress();
+
+	    if (!d3_event.shiftKey) {
+	      context.surface().classed('behavior-multiselect', false);
 	    }
 
-	    baseLayer.source(!fail ? d : background.findSource('none'));
-	    dispatch$1.call('change');
-	    background.updateImagery();
-	    return background;
-	  };
+	    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;
 
+	      if (pointer) {
+	        delete _downPointers.spacebar;
+	        if (pointer.done) return;
+	        d3_event.preventDefault();
+	        _lastInteractionType = 'spacebar';
+	        click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
+	      }
+	    }
+	  }
 
-	  background.findSource = function (id) {
-	    if (!id || !_imageryIndex) { return null; }   // called before init()?
-	    return _imageryIndex.backgrounds.find(function (d) { return d.id && d.id === id; });
-	  };
+	  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
+	    };
+	  }
 
+	  function didLongPress(id, interactionType) {
+	    var pointer = _downPointers[id];
+	    if (!pointer) return;
 
-	  background.bing = function () {
-	    background.baseLayerSource(background.findSource('Bing'));
-	  };
+	    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
 
 
-	  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; });
-	  };
+	    _longPressTimeout = null;
+	    _lastInteractionType = interactionType;
+	    _showMenu = true;
+	    click(pointer.firstEvent, pointer.lastEvent, id);
+	  }
 
+	  function pointermove(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
 
-	  background.overlayLayerSources = function () {
-	    return _overlayLayers.map(function (layer) { return layer.source(); });
-	  };
+	    if (_downPointers[id]) {
+	      _downPointers[id].lastEvent = d3_event;
+	    }
 
+	    if (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
+	      _lastMouseEvent = d3_event;
 
-	  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 (_downPointers.spacebar) {
+	        _downPointers.spacebar.lastEvent = d3_event;
 	      }
 	    }
+	  }
 
-	    layer = rendererTileLayer(context)
-	      .source(d)
-	      .projection(context.projection)
-	      .dimensions(baseLayer.dimensions()
-	    );
+	  function pointerup(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    var pointer = _downPointers[id];
+	    if (!pointer) return;
+	    delete _downPointers[id];
 
-	    _overlayLayers.push(layer);
-	    dispatch$1.call('change');
-	    background.updateImagery();
-	  };
+	    if (_multiselectionPointerId === id) {
+	      _multiselectionPointerId = null;
+	    }
+
+	    if (pointer.done) return;
+	    click(pointer.firstEvent, d3_event, id);
+	  }
 
+	  function pointercancel(d3_event) {
+	    var id = (d3_event.pointerId || 'mouse').toString();
+	    if (!_downPointers[id]) return;
+	    delete _downPointers[id];
 
-	  background.nudge = function (d, zoom) {
-	    var currSource = baseLayer.source();
-	    if (currSource) {
-	      currSource.nudge(d, zoom);
-	      dispatch$1.call('change');
-	      background.updateImagery();
+	    if (_multiselectionPointerId === id) {
+	      _multiselectionPointerId = null;
 	    }
-	    return background;
-	  };
+	  }
 
+	  function contextmenu(d3_event) {
+	    d3_event.preventDefault();
 
-	  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();
+	    if (!+d3_event.clientX && !+d3_event.clientY) {
+	      if (_lastMouseEvent) {
+	        d3_event.sourceEvent = _lastMouseEvent;
+	      } else {
+	        return;
+	      }
+	    } else {
+	      _lastMouseEvent = d3_event;
+	      _lastInteractionType = 'rightclick';
 	    }
-	    return background;
-	  };
 
+	    _showMenu = true;
+	    click(d3_event, d3_event);
+	  }
 
-	  background.brightness = function(d) {
-	    if (!arguments.length) { return _brightness; }
-	    _brightness = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
-	    return background;
-	  };
+	  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.
 
+	    var pointGetter = utilFastMouse(mapNode);
+	    var p1 = pointGetter(firstEvent);
+	    var p2 = pointGetter(lastEvent);
+	    var dist = geoVecLength(p1, p2);
 
-	  background.contrast = function(d) {
-	    if (!arguments.length) { return _contrast; }
-	    _contrast = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
-	    return background;
-	  };
+	    if (dist > _tolerancePx || !mapContains(lastEvent)) {
+	      resetProperties();
+	      return;
+	    }
 
+	    var targetDatum = lastEvent.target.__data__;
+	    var multiselectEntityId;
 
-	  background.saturation = function(d) {
-	    if (!arguments.length) { return _saturation; }
-	    _saturation = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
-	    return background;
-	  };
+	    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
 
-	  background.sharpness = function(d) {
-	    if (!arguments.length) { return _sharpness; }
-	    _sharpness = d;
-	    if (context.mode()) { dispatch$1.call('change'); }
-	    return background;
-	  };
+	        multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
+	        _downPointers[selectPointerInfo.pointerId].done = true;
+	      }
+	    } // support multiselect if data is already selected
 
-	  var _loadPromise;
 
-	  background.ensureLoaded = function () {
+	    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);
 
-	    if (_loadPromise) { return _loadPromise; }
+	    processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
 
-	    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 mapContains(event) {
+	      var rect = mapNode.getBoundingClientRect();
+	      return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;
 	    }
 
-	    var hash = utilStringQs(window.location.hash);
-	    var requested = hash.background || hash.layer;
-	    var extent = parseMapParams(hash.map);
+	    function pointerDownOnSelection(skipPointerId) {
+	      var mode = context.mode();
+	      var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
 
-	    return _loadPromise = ensureImageryIndex()
-	      .then(function (imageryIndex) {
-	        var first = imageryIndex.backgrounds.length && imageryIndex.backgrounds[0];
+	      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
+	        };
+	      }
 
-	        var best;
-	        if (!requested && extent) {
-	          best = background.sources(extent).find(function (s) { return s.best(); });
-	        }
+	      return null;
+	    }
+	  }
 
-	        // 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);
-	        } else {
-	          background.baseLayerSource(
-	            background.findSource(requested) ||
-	            best ||
-	            background.findSource(corePreferences('background-last-used')) ||
-	            background.findSource('Bing') ||
-	            first ||
-	            background.findSource('none')
-	          );
-	        }
+	  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;
 
-	        var locator = imageryIndex.backgrounds.find(function (d) { return d.overlay && d.default; });
-	        if (locator) {
-	          background.toggleOverlayLayer(locator);
-	        }
+	    if (datum && datum.type === 'midpoint') {
+	      // treat targeting midpoints as if targeting the parent way
+	      datum = datum.parents[0];
+	    }
 
-	        var overlays = (hash.overlays || '').split(',');
-	        overlays.forEach(function (overlay) {
-	          overlay = background.findSource(overlay);
-	          if (overlay) {
-	            background.toggleOverlayLayer(overlay);
-	          }
-	        });
+	    var newMode;
 
-	        if (hash.gpx) {
-	          var gpx = context.layers().layer('data');
-	          if (gpx) {
-	            gpx.url(hash.gpx, '.gpx');
-	          }
-	        }
+	    if (datum instanceof osmEntity) {
+	      // targeting an entity
+	      var selectedIDs = context.selectedIDs();
+	      context.selectedNoteID(null);
+	      context.selectedErrorID(null);
 
-	        if (hash.offset) {
-	          var offset = hash.offset
-	            .replace(/;/g, ',')
-	            .split(',')
-	            .map(function (n) { return !isNaN(n) && n; });
+	      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
 
-	          if (offset.length === 2) {
-	            background.offset(geoMetersToOffset(offset));
-	          }
+	          newMode = mode.id === 'select' ? mode.selectedIDs(selectedIDs) : modeSelect(context, selectedIDs).selectBehavior(behavior);
+	          context.enter(newMode);
 	        }
-	      })
-	      .catch(function () { /* ignore */ });
-	  };
-
-
-	  return utilRebind(background, dispatch$1, 'on');
-	}
-
-	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
-	    };
-
-	    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(','));
+	      } 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);
 	        }
-	        _hidden = features.hidden();
-	        dispatch$1.call('change');
-	        dispatch$1.call('redraw');
+	      }
+	    } 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);
+
+	      if (!isMultiselect && mode.id !== 'browse') {
+	        context.enter(modeBrowse(context));
+	      }
 	    }
 
+	    context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it
 
-	    function defineRule(k, filter, max) {
-	        var isEnabled = true;
+	    if (showMenu) context.ui().showEditMenu(point, interactionType);
+	    resetProperties();
+	  }
 
-	        _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; }
-	        };
-	    }
+	  function cancelLongPress() {
+	    if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
+	    _longPressTimeout = null;
+	  }
 
+	  function resetProperties() {
+	    cancelLongPress();
+	    _showMenu = false;
+	    _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
+	  }
 
-	    defineRule('points', function isPoint(tags, geometry) {
-	        return geometry === 'point';
-	    }, 200);
+	  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;
 
-	    defineRule('traffic_roads', function isTrafficRoad(tags) {
-	        return traffic_roads[tags.highway];
+	      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);
+	    }*/
+	  }
 
-	    defineRule('service_roads', function isServiceRoad(tags) {
-	        return service_roads[tags.highway];
-	    });
+	  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);
+	  };
 
-	    defineRule('paths', function isPath(tags) {
-	        return paths[tags.highway];
-	    });
+	  return behavior;
+	}
 
-	    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
-	        );
-	    });
+	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.
 
-	    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 _nodeIndex;
 
-	    defineRule('rail', function isRail(tags) {
-	        return (
-	            !!tags.railway ||
-	            tags.landuse === 'railway'
-	        ) && !(
-	            traffic_roads[tags.highway] ||
-	            service_roads[tags.highway] ||
-	            paths[tags.highway]
-	        );
-	    });
+	  var _origWay;
 
-	    defineRule('pistes', function isPiste(tags) {
-	        return tags['piste:type'];
-	    });
+	  var _wayGeometry;
 
-	    defineRule('aerialways', function isPiste(tags) {
-	        return tags.aerialway &&
-	            tags.aerialway !== 'yes' &&
-	            tags.aerialway !== 'station';
-	    });
+	  var _headNodeID;
 
-	    defineRule('power', function isPower(tags) {
-	        return !!tags.power;
-	    });
+	  var _annotation;
 
-	    // 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; }
+	  var _pointerHasMoved = false; // The osmNode to be placed.
+	  // This is temporary and just follows the mouse cursor until an "add" event occurs.
 
-	        var strings = Object.keys(tags);
+	  var _drawNode;
 
-	        for (var i = 0; i < strings.length; i++) {
-	            var s = strings[i];
-	            if (past_futures[s] || past_futures[tags[s]]) { return true; }
-	        }
-	        return false;
-	    });
+	  var _didResolveTempEdit = 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`
-	    defineRule('others', function isOther(tags, geometry) {
-	        return (geometry === 'line' || geometry === 'area');
+	  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);
+	      }
 
+	      context.surface().classed('nope', false).classed('nope-disabled', true);
+	    }
+	  }
 
+	  function keyup(d3_event) {
+	    if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+	      if (context.surface().classed('nope-suppressed')) {
+	        context.surface().classed('nope', true);
+	      }
 
-	    features.features = function() {
-	        return _rules;
-	    };
-
-
-	    features.keys = function() {
-	        return _keys;
-	    };
+	      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()`
 
-	    features.enabled = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return _rules[k].enabled; });
-	        }
-	        return _rules[k] && _rules[k].enabled;
-	    };
 
+	  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;
 
-	    features.disabled = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return !_rules[k].enabled; });
-	        }
-	        return _rules[k] && !_rules[k].enabled;
-	    };
+	    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);
 
+	      if (choice) {
+	        loc = choice.loc;
+	      }
+	    }
 
-	    features.hidden = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return _rules[k].hidden(); });
-	        }
-	        return _rules[k] && _rules[k].hidden();
-	    };
+	    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
 
 
-	    features.autoHidden = function(k) {
-	        if (!arguments.length) {
-	            return _keys.filter(function(k) { return _rules[k].autoHidden(); });
-	        }
-	        return _rules[k] && _rules[k].autoHidden();
-	    };
+	  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);
+	    }
+	  }
 
-	    features.enable = function(k) {
-	        if (_rules[k] && !_rules[k].enabled) {
-	            _rules[k].enable();
-	            update();
-	        }
-	    };
+	  function isInvalidGeometry(includeDrawNode) {
+	    var testNode = _drawNode; // we only need to test the single way we're drawing
 
-	    features.enableAll = function() {
-	        var didEnable = false;
-	        for (var k in _rules) {
-	            if (!_rules[k].enabled) {
-	                didEnable = true;
-	                _rules[k].enable();
-	            }
-	        }
-	        if (didEnable) { update(); }
-	    };
+	    var parentWay = context.graph().entity(wayID);
+	    var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy
 
+	    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;
+	      }
+	    }
 
-	    features.disable = function(k) {
-	        if (_rules[k] && _rules[k].enabled) {
-	            _rules[k].disable();
-	            update();
-	        }
-	    };
+	    return testNode && geoHasSelfIntersections(nodes, testNode.id);
+	  }
 
-	    features.disableAll = function() {
-	        var didDisable = false;
-	        for (var k in _rules) {
-	            if (_rules[k].enabled) {
-	                didDisable = true;
-	                _rules[k].disable();
-	            }
-	        }
-	        if (didDisable) { update(); }
-	    };
+	  function undone() {
+	    // undoing removed the temp edit
+	    _didResolveTempEdit = true;
+	    context.pauseChangeDispatch();
+	    var nextMode;
 
+	    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);
+	    }
 
-	    features.toggle = function(k) {
-	        if (_rules[k]) {
-	            (function(f) { return f.enabled ? f.disable() : f.enable(); }(_rules[k]));
-	            update();
-	        }
-	    };
+	    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();
+	      }
 
-	    features.resetStats = function() {
-	        for (var i = 0; i < _keys.length; i++) {
-	            _rules[_keys[i]].count = 0;
-	        }
-	        dispatch$1.call('change');
-	    };
+	      dispatch$1.call('rejectedSelfIntersection', this);
+	      return; // can't click here
+	    }
 
+	    context.pauseChangeDispatch();
+	    doAdd(); // we just replaced the temporary edit with the real one
 
-	    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;
+	    _didResolveTempEdit = true;
+	    context.resumeChangeDispatch();
+	    context.enter(mode);
+	  } // Accept the current position of the drawing node
 
-	        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..
-	        _cullFactor = dimensions[0] * dimensions[1] / 1000000;
+	  drawWay.add = function (loc, d) {
+	    attemptAdd(d, loc, function () {// don't need to do anything extra
+	    });
+	  }; // Connect the way to an existing way
 
-	        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++;
-	            }
-	        }
 
-	        currHidden = features.hidden();
-	        if (currHidden !== _hidden) {
-	            _hidden = currHidden;
-	            needsRedraw = true;
-	            dispatch$1.call('change');
-	        }
+	  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
 
-	        return needsRedraw;
-	    };
 
+	  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;
+	    }
 
-	    features.stats = function() {
-	        for (var i = 0; i < _keys.length; i++) {
-	            _stats[_keys[i]] = _rules[_keys[i]].count;
-	        }
+	    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.
 
-	        return _stats;
-	    };
 
+	  drawWay.finish = function () {
+	    checkGeometry(false
+	    /* includeDrawNode */
+	    );
 
-	    features.clear = function(d) {
-	        for (var i = 0; i < d.length; i++) {
-	            features.clearEntity(d[i]);
-	        }
-	    };
+	    if (context.surface().classed('nope')) {
+	      dispatch$1.call('rejectedSelfIntersection', this);
+	      return; // can't click here
+	    }
 
+	    context.pauseChangeDispatch(); // remove the temporary edit
 
-	    features.clearEntity = function(entity) {
-	        delete _cache[osmEntity.key(entity)];
-	    };
+	    context.pop(1);
+	    _didResolveTempEdit = true;
+	    context.resumeChangeDispatch();
+	    var way = context.hasEntity(wayID);
 
+	    if (!way || way.isDegenerate()) {
+	      drawWay.cancel();
+	      return;
+	    }
 
-	    features.reset = function() {
-	        Array.from(_deferred).forEach(function(handle) {
-	            window.cancelIdleCallback(handle);
-	            _deferred.delete(handle);
-	        });
+	    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.
 
-	        _cache = {};
-	    };
 
-	    // 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;
-	                            }
-	                        }
-	                    }
-	                }
+	  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));
+	  };
 
-	                if (_rules[_keys[i]].filter(entity.tags, geometry)) {
-	                    matches[_keys[i]] = hasMatch = true;
-	                }
-	            }
-	            _cache[ent].matches = matches;
-	        }
+	  drawWay.nodeIndex = function (val) {
+	    if (!arguments.length) return _nodeIndex;
+	    _nodeIndex = val;
+	    return drawWay;
+	  };
 
-	        return _cache[ent].matches;
-	    };
+	  drawWay.activeID = function () {
+	    if (!arguments.length) return _drawNode && _drawNode.id; // no assign
 
+	    return drawWay;
+	  };
 
-	    features.getParents = function(entity, resolver, geometry) {
-	        if (geometry === 'point') { return []; }
+	  return utilRebind(drawWay, dispatch$1, 'on');
+	}
 
-	        var ent = osmEntity.key(entity);
-	        if (!_cache[ent]) {
-	            _cache[ent] = {};
-	        }
+	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;
 
-	        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;
-	    };
+	  mode.enter = function () {
+	    behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
+	    context.install(behavior);
+	  };
 
+	  mode.exit = function () {
+	    context.uninstall(behavior);
+	  };
 
-	    features.isHiddenPreset = function(preset, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!preset.tags) { return false; }
+	  mode.selectedIDs = function () {
+	    return [wayID];
+	  };
 
-	        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;
-	    };
+	  mode.activeID = function () {
+	    return behavior && behavior.activeID() || [];
+	  };
 
+	  return mode;
+	}
 
-	    features.isHiddenFeature = function(entity, resolver, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!entity.version) { return false; }
-	        if (_forceVisible[entity.id]) { return false; }
+	function operationContinue(context, selectedIDs) {
+	  var _entities = selectedIDs.map(function (id) {
+	    return context.graph().entity(id);
+	  });
 
-	        var matches = Object.keys(features.getMatches(entity, resolver, geometry));
-	        return matches.length && matches.every(function(k) { return features.hidden(k); });
-	    };
+	  var _geometries = Object.assign({
+	    line: [],
+	    vertex: []
+	  }, utilArrayGroupBy(_entities, function (entity) {
+	    return entity.geometry(context.graph());
+	  }));
 
+	  var _vertex = _geometries.vertex.length && _geometries.vertex[0];
 
-	    features.isHiddenChild = function(entity, resolver, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!entity.version || geometry === 'point') { return false; }
-	        if (_forceVisible[entity.id]) { return false; }
+	  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 parents = features.getParents(entity, resolver, geometry);
-	        if (!parents.length) { return false; }
+	  var _candidates = candidateWays();
 
-	        for (var i = 0; i < parents.length; i++) {
-	            if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
-	                return false;
-	            }
-	        }
-	        return true;
-	    };
+	  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] : [];
+	  };
 
-	    features.hasHiddenConnections = function(entity, resolver) {
-	        if (!_hidden.length) { return false; }
+	  operation.available = function () {
+	    return _geometries.vertex.length === 1 && _geometries.line.length <= 1 && !context.features().hasHiddenConnections(_vertex, context.graph());
+	  };
 
-	        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));
-	        }
+	  operation.disabled = function () {
+	    if (_candidates.length === 0) {
+	      return 'not_eligible';
+	    } else if (_candidates.length > 1) {
+	      return 'multiple';
+	    }
 
-	        // gather ways connected to child nodes..
-	        connections = childNodes.reduce(function(result, e) {
-	            return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
-	        }, connections);
+	    return false;
+	  };
 
-	        return connections.some(function(e) {
-	            return features.isHidden(e, resolver, e.geometry(resolver));
-	        });
-	    };
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
+	  };
 
+	  operation.annotation = function () {
+	    return _t('operations.continue.annotation.line');
+	  };
 
-	    features.isHidden = function(entity, resolver, geometry) {
-	        if (!_hidden.length) { return false; }
-	        if (!entity.version) { return false; }
+	  operation.id = 'continue';
+	  operation.keys = [_t('operations.continue.key')];
+	  operation.title = _t('operations.continue.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        var fn = (geometry === 'vertex' ? features.isHiddenChild : features.isHiddenFeature);
-	        return fn(entity, resolver, geometry);
-	    };
+	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';
+	    });
+	  }
 
-	    features.filter = function(d, resolver) {
-	        if (!_hidden.length) { return d; }
+	  var operation = function operation() {
+	    var graph = context.graph();
+	    var selected = groupEntities(getFilteredIdsToCopy(), graph);
+	    var canCopy = [];
+	    var skip = {};
+	    var entity;
+	    var i;
 
-	        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;
-	    };
+	    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);
+	      }
+	    }
 
-	    features.forceVisible = function(entityIDs) {
-	        if (!arguments.length) { return Object.keys(_forceVisible); }
+	    for (i = 0; i < selected.way.length; i++) {
+	      entity = selected.way[i];
 
-	        _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;
-	    };
+	      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];
 
-	    features.init = function() {
-	        var storage = corePreferences('disabled-features');
-	        if (storage) {
-	            var storageDisabled = storage.replace(/;/g, ',').split(',');
-	            storageDisabled.forEach(features.disable);
-	        }
+	      if (!skip[entity.id]) {
+	        canCopy.push(entity.id);
+	      }
+	    }
 
-	        var hash = utilStringQs(window.location.hash);
-	        if (hash.disable_features) {
-	            var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
-	            hashDisabled.forEach(features.disable);
-	        }
-	    };
+	    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);
+	    }
+	  };
 
-	    // 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);
-	            }
-	        });
-	        _deferred.add(handle);
+	  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 || {};
 
-	    return features;
-	}
+	    if (entity.type === 'relation') {
+	      children = entity.members.map(function (m) {
+	        return m.id;
+	      });
+	    } else if (entity.type === 'way') {
+	      children = entity.nodes;
+	    } else {
+	      children = [];
+	    }
 
-	// 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; }
+	    for (var i = 0; i < children.length; i++) {
+	      if (!descendants[children[i]]) {
+	        descendants[children[i]] = true;
+	        descendants = getDescendants(children[i], graph, descendants);
+	      }
+	    }
 
-	    var parents = graph.parentWays(node);
+	    return descendants;
+	  }
 
-	    var i, j, nodes, isClosed, ix1, ix2, ix3, ix4, max;
+	  operation.available = function () {
+	    return getFilteredIdsToCopy().length > 0;
+	  };
 
-	    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; }
-	                }
+	  operation.disabled = function () {
+	    var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
 
-	                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 (extent.percentContainedIn(context.map().extent()) < 0.8) {
+	      return 'too_large';
 	    }
 
-	    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;
-	                }
-
-	                a = b;
-	            }
-	        })));
+	    return false;
+	  };
 
-	        return segments;
-	    };
-	}
+	  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();
+	  };
 
-	function svgPath(projection, graph, isArea) {
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.copy.' + disable, {
+	      n: selectedIDs.length
+	    }) : _t('operations.copy.description', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	    // 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)
+	  operation.annotation = function () {
+	    return _t('operations.copy.annotation', {
+	      n: selectedIDs.length
+	    });
+	  };
 
-	    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));
-	        }
-	    };
+	  var _point;
 
-	    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);
-	        }
-	    };
+	  operation.point = function (val) {
+	    _point = val;
+	    return operation;
+	  };
 
-	    return svgpath;
+	  operation.id = 'copy';
+	  operation.keys = [uiCmd('⌘C')];
+	  operation.title = _t('operations.copy.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
+	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);
+	    }
+	  });
 
-	function svgPointTransform(projection) {
-	    var svgpoint = function(entity) {
-	        // http://jsperf.com/short-array-join
-	        var pt = projection(entity.loc);
-	        return 'translate(' + pt[0] + ',' + pt[1] + ')';
-	    };
+	  var _coords,
+	      _descriptionID = '',
+	      _annotationID = 'features';
 
-	    svgpoint.geojson = function(d) {
-	        return svgpoint(d.properties.entity);
-	    };
+	  var _disconnectingVertexIds = [];
+	  var _disconnectingWayIds = [];
 
-	    return svgpoint;
-	}
+	  if (_vertexIDs.length > 0) {
+	    // At the selected vertices, disconnect the selected ways, if any, else
+	    // disconnect all connected ways
+	    _disconnectingVertexIds = _vertexIDs;
 
+	    _vertexIDs.forEach(function (vertexID) {
+	      var action = actionDisconnect(vertexID);
 
-	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);
-	            }
+	      if (_wayIDs.length > 0) {
+	        var waysIDsForVertex = _wayIDs.filter(function (wayID) {
+	          var way = context.entity(wayID);
+	          return way.nodes.indexOf(vertexID) !== -1;
 	        });
-	        return tags;
-	    };
-	}
 
+	        action.limitWays(waysIDsForVertex);
+	      }
+
+	      _actions.push(action);
 
-	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);
+	      _disconnectingWayIds = _disconnectingWayIds.concat(context.graph().parentWays(context.graph().entity(vertexID)).map(function (d) {
+	        return d.id;
+	      }));
+	    });
+
+	    _disconnectingWayIds = utilArrayUniq(_disconnectingWayIds).filter(function (id) {
+	      return _wayIDs.indexOf(id) === -1;
+	    });
+	    _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
+
+	    if (_wayIDs.length === 1) {
+	      _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
 	    } 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);
-	                }
-	            }
+	      _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);
+	    });
 
-	            start = end;
-	        }
+	    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
 
-	        return features;
+	    var sharedActions = [];
+	    var sharedNodes = []; // actions for connected nodes
 
-	        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]
-	                }
-	            });
+	    var unsharedActions = [];
+	    var unsharedNodes = [];
+	    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 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]
-	                }
-	            });
+	        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';
+	      }
 	    }
-	}
+	  }
 
-	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;
-	            }
+	  var _extent = utilTotalExtent(_disconnectingVertexIds, context.graph());
 
-	            var t = _tags(entity);
+	  var operation = function operation() {
+	    context.perform(function (graph) {
+	      return _actions.reduce(function (graph, action) {
+	        return action(graph);
+	      }, graph);
+	    }, operation.annotation());
+	    context.validator().validate();
+	  };
 
-	            var computed = tagClasses.getClassesString(t, value);
+	  operation.relatedEntityIds = function () {
+	    if (_vertexIDs.length) {
+	      return _disconnectingWayIds;
+	    }
 
-	            if (computed !== value) {
-	                select(this).attr('class', computed);
-	            }
-	        });
-	    };
+	    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;
+	  };
 
-	    tagClasses.getClassesString = function(t, value) {
-	        var primary, status;
-	        var i, j, k, v;
+	  operation.disabled = function () {
+	    var reason;
 
-	        // 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';
-	            }
-	        }
+	    for (var actionIndex in _actions) {
+	      reason = _actions[actionIndex].disabled(context.graph());
+	      if (reason) return reason;
+	    }
 
-	        // 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;
-	            });
+	    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';
+	    }
 
-	        // 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; }
+	    return false;
 
-	            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';
-	            }
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	            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);
-	            }
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	            break;
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
 	        }
+	      }
 
-	        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; }
+	      return false;
+	    }
+	  };
 
-	                    status = statuses[i];
-	                    break;
-	                }
-	            }
-	        }
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
 
-	        // 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 (disable) {
+	      return _t('operations.disconnect.' + disable);
+	    }
 
-	                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; }
-	            }
-	        }
+	    return _t('operations.disconnect.description.' + _descriptionID);
+	  };
 
-	        if (status) {
-	            classes.push('tag-status');
-	            classes.push('tag-status-' + status);
-	        }
+	  operation.annotation = function () {
+	    return _t('operations.disconnect.annotation.' + _annotationID);
+	  };
 
-	        // 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);
-	        }
+	  operation.id = 'disconnect';
+	  operation.keys = [_t('operations.disconnect.key')];
+	  operation.title = _t('operations.disconnect.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        // 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 operationDowngrade(context, selectedIDs) {
+	  var _affectedFeatureCount = 0;
 
-	        // If this is a wikidata-tagged item, add a class for that..
-	        if (t.wikidata || t['brand:wikidata']) {
-	            classes.push('tag-wikidata');
-	        }
+	  var _downgradeType = downgradeTypeForEntityIDs(selectedIDs);
 
-	        return classes.join(' ').trim();
-	    };
+	  var _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';
 
+	  function downgradeTypeForEntityIDs(entityIds) {
+	    var downgradeType;
+	    _affectedFeatureCount = 0;
 
-	    tagClasses.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-	        return tagClasses;
-	    };
+	    for (var i in entityIds) {
+	      var entityID = entityIds[i];
+	      var type = downgradeTypeForEntityID(entityID);
 
-	    return tagClasses;
-	}
+	      if (type) {
+	        _affectedFeatureCount += 1;
 
-	// 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' } ]
+	        if (downgradeType && type !== downgradeType) {
+	          if (downgradeType !== 'generic' && type !== 'generic') {
+	            downgradeType = 'building_address';
+	          } else {
+	            downgradeType = 'generic';
+	          }
+	        } else {
+	          downgradeType = type;
+	        }
+	      }
 	    }
-	};
 
-	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;
-	    }
+	    return downgradeType;
+	  }
 
-	    for (var tag in patterns) {
-	        var entityValue = tags[tag];
-	        if (!entityValue) { continue; }
+	  function downgradeTypeForEntityID(entityID) {
+	    var graph = context.graph();
+	    var entity = graph.entity(entityID);
+	    var preset = _mainPresetIndex.match(entity, graph);
+	    if (!preset || preset.isFallback()) return null;
 
-	        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; }
+	    if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
+	      return key.match(/^addr:.{1,}/);
+	    })) {
+	      return 'address';
+	    }
 
-	                var rules = values[value];
-	                if (typeof rules === 'string') { // short syntax - pattern name
-	                    return 'pattern-' + rules;
-	                }
+	    var geometry = entity.geometry(graph);
 
-	                // 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 (geometry === 'area' && entity.tags.building && !preset.tags.building) {
+	      return 'building';
+	    }
 
-	                    if (pass) {
-	                        return 'pattern-' + rule.pattern;
-	                    }
-	                }
-	            }
-	        }
+	    if (geometry === 'vertex' && Object.keys(entity.tags).length) {
+	      return 'generic';
 	    }
 
 	    return null;
-	}
+	  }
 
-	function svgAreas(projection, context) {
+	  var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
+	  var addressKeysToKeep = ['source'];
+
+	  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
 
+	        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;
+	          }
 
-	    function getPatternStyle(tags) {
-	        var imageID = svgTagPattern(tags);
-	        if (imageID) {
-	            return 'url("#ideditor-' + imageID + '")';
+	          if (type !== 'generic' && key.match(/^addr:.{1,}/)) continue;
+	          delete tags[key];
 	        }
-	        return '';
-	    }
 
+	        graph = actionChangeTags(entityID, tags)(graph);
+	      }
 
-	    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();
+	      return graph;
+	    }, operation.annotation());
+	    context.validator().validate(); // refresh the select mode to enable the delete operation
 
-	        // The targets and nopes will be MultiLineString sub-segments of the ways
-	        var data = { targets: [], nopes: [] };
+	    context.enter(modeSelect(context, selectedIDs));
+	  };
 
-	        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);
-	        });
+	  operation.available = function () {
+	    return _downgradeType;
+	  };
 
+	  operation.disabled = function () {
+	    if (selectedIDs.some(hasWikidataTag)) {
+	      return 'has_wikidata_tag';
+	    }
 
-	        // 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; });
+	    return false;
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	    function hasWikidataTag(id) {
+	      var entity = context.entity(id);
+	      return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+	    }
+	  };
 
-	        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);
-	            });
-	        };
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
+	  };
 
-	        // 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))
-	                };
-	            }
-	        }
+	  operation.annotation = function () {
+	    var suffix;
 
-	        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 (_downgradeType === 'building_address') {
+	      suffix = 'generic';
+	    } else {
+	      suffix = _downgradeType;
+	    }
 
-	        var strokes = fills.filter(function(area) { return area.type === 'way'; });
+	    return _t('operations.downgrade.annotation.' + suffix, {
+	      n: _affectedFeatureCount
+	    });
+	  };
 
-	        var data = {
-	            clip: fills,
-	            shadow: strokes,
-	            stroke: strokes,
-	            fill: fills
-	        };
+	  operation.id = 'downgrade';
+	  operation.keys = [uiCmd('⌫')];
+	  operation.title = _t('operations.downgrade.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	        var clipPaths = context.surface().selectAll('defs').selectAll('.clipPath-osm')
-	           .filter(filter)
-	           .data(data.clip, osmEntity.key);
+	function operationExtract(context, selectedIDs) {
+	  var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
 
-	        clipPaths.exit()
-	           .remove();
+	  var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
+	    return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
+	  }).filter(Boolean));
 
-	        var clipPathsEnter = clipPaths.enter()
-	           .append('clipPath')
-	           .attr('class', 'clipPath-osm')
-	           .attr('id', function(entity) { return 'ideditor-' + entity.id + '-clippath'; });
+	  var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
 
-	        clipPathsEnter
-	           .append('path');
+	  var _extent;
 
-	        clipPaths.merge(clipPathsEnter)
-	           .selectAll('path')
-	           .attr('d', path);
+	  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
 
-	        var drawLayer = selection.selectAll('.layer-osm.areas');
-	        var touchLayer = selection.selectAll('.layer-touch.areas');
+	      if (preset.geometry.indexOf('point') === -1) return null;
+	    }
 
-	        // Draw areas..
-	        var areagroup = drawLayer
-	            .selectAll('g.areagroup')
-	            .data(['fill', 'shadow', 'stroke']);
+	    _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+	    return actionExtract(entityID);
+	  }).filter(Boolean);
 
-	        areagroup = areagroup.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'areagroup area-' + d; })
-	            .merge(areagroup);
+	  var operation = function operation() {
+	    var combinedAction = function combinedAction(graph) {
+	      _actions.forEach(function (action) {
+	        graph = action(graph);
+	      });
 
-	        var paths = areagroup
-	            .selectAll('path')
-	            .filter(filter)
-	            .data(function(layer) { return data[layer]; }, osmEntity.key);
+	      return graph;
+	    };
 
-	        paths.exit()
-	            .remove();
+	    context.perform(combinedAction, operation.annotation()); // do the extract
 
+	    var extractedNodeIDs = _actions.map(function (action) {
+	      return action.getExtractedNodeID();
+	    });
 
-	        var fillpaths = selection.selectAll('.area-fill path.area').nodes();
-	        var bisect = d3_bisector(function(node) { return -node.__data__.area(graph); }).left;
+	    context.enter(modeSelect(context, extractedNodeIDs));
+	  };
 
-	        function sortedByArea(entity) {
-	            if (this._parent.__data__ === 'fill') {
-	                return fillpaths[bisect(fillpaths, -entity.area(graph))];
-	            }
-	        }
+	  operation.available = function () {
+	    return _actions.length && selectedIDs.length === _actions.length;
+	  };
 
-	        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);
+	  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 (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);
+	    return false;
+	  };
 
+	  operation.tooltip = function () {
+	    var disableReason = operation.disabled();
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, data.stroke, filter);
+	    if (disableReason) {
+	      return _t('operations.extract.' + disableReason + '.' + _amount);
+	    } else {
+	      return _t('operations.extract.description.' + _geometryID + '.' + _amount);
 	    }
+	  };
 
-	    return drawAreas;
+	  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;
 	}
 
-	//[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(',')
+	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;
+	    }
 
-	//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 />
+	    context.enter(modeSelect(context, resultIDs));
+	  };
 
-	function XMLReader(){
-		
-	}
+	  operation.available = function () {
+	    return selectedIDs.length >= 2;
+	  };
 
-	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;
-	}
+	  operation.disabled = function () {
+	    var actionDisabled = _action.disabled(context.graph());
 
-	/**
-	 * @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;
-	}
+	    if (actionDisabled) return actionDisabled;
+	    var osm = context.connection();
 
+	    if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
+	      return 'too_many_vertices';
+	    }
 
+	    return false;
+	  };
 
-	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;
-	}
+	  operation.tooltip = function () {
+	    var disabled = operation.disabled();
 
-	/**
-	 * @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){},
-	};
+	    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
+	    });
+	  };
 
-	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;
-		};
+	  operation.id = 'merge';
+	  operation.keys = [_t('operations.merge.key')];
+	  operation.title = _t('operations.merge.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
 	}
 
-	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; }
-		}
-	}
+	function operationPaste(context) {
+	  var _pastePoint;
 
-	var XMLReader_1 = XMLReader;
+	  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 sax = {
-		XMLReader: XMLReader_1
-	};
+	    for (var id in copies) {
+	      var oldEntity = oldGraph.entity(id);
+	      var newEntity = copies[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
-	 */
+	      extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-	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;
 
-	// 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);
+	      var parents = context.graph().parentWays(newEntity);
+	      var parentCopied = parents.some(function (parent) {
+	        return originals.has(parent.id);
+	      });
+
+	      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
 
 
-	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];
-	};
+	    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
 
-	_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;
-		}
-	};
+	    context.replace(actionMove(newIDs, delta, projection), operation.annotation());
+	    context.enter(modeSelect(context, newIDs));
+	  };
 
+	  operation.point = function (val) {
+	    _pastePoint = val;
+	    return operation;
+	  };
 
-	/**
-	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
-	 */
+	  operation.available = function () {
+	    return context.mode().id === 'browse';
+	  };
 
-	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;
+	  operation.disabled = function () {
+	    return !context.copyIDs().length;
+	  };
+
+	  operation.tooltip = function () {
+	    var oldGraph = context.copyGraph();
+	    var ids = context.copyIDs();
+
+	    if (!ids.length) {
+	      return _t('operations.paste.nothing_copied');
 	    }
-	};
 
+	    return _t('operations.paste.description', {
+	      feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
+	      n: ids.length
+	    });
+	  };
+
+	  operation.annotation = function () {
+	    var ids = context.copyIDs();
+	    return _t('operations.paste.annotation', {
+	      n: ids.length
+	    });
+	  };
 
-	function _xmlEncoder(c){
-		return c == '<' && '&lt;' ||
-	         c == '>' && '&gt;' ||
-	         c == '&' && '&amp;' ||
-	         c == '"' && '&quot;' ||
-	         '&#'+c.charCodeAt()+';'
+	  operation.id = 'paste';
+	  operation.keys = [uiCmd('⌘V')];
+	  operation.title = _t('operations.paste.title');
+	  return operation;
 	}
 
+	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();
+	  };
 
-	copy$2(NodeType,Node);
-	copy$2(NodeType,Node.prototype);
+	  function actions(situation) {
+	    return selectedIDs.map(function (entityID) {
+	      var entity = context.hasEntity(entityID);
+	      if (!entity) return null;
 
-	/**
-	 * @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;
-			}
-		}
-	}
+	      if (situation === 'toolbar') {
+	        if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
+	      }
 
-	/**
-	 * 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);
+	      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);
+	  }
 
+	  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';
+	  }
 
-	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;
+	  operation.available = function (situation) {
+	    return actions(situation).length > 0;
+	  };
 
+	  operation.disabled = function () {
+	    return false;
+	  };
 
-	_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);
+	  operation.tooltip = function () {
+	    return _t('operations.reverse.description.' + reverseTypeID());
+	  };
 
-	function CDATASection() {
-	}CDATASection.prototype = {
-		nodeName : "#cdata-section",
-		nodeType : CDATA_SECTION_NODE
-	};
-	_extends(CDATASection,CharacterData);
+	  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;
+	}
 
-	function DocumentType() {
-	}DocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;
-	_extends(DocumentType,Node);
+	function operationSplit(context, selectedIDs) {
+	  var _vertexIds = selectedIDs.filter(function (id) {
+	    return context.graph().geometry(id) === 'vertex';
+	  });
 
-	function Notation() {
-	}Notation.prototype.nodeType = NOTATION_NODE;
-	_extends(Notation,Node);
+	  var _selectedWayIds = selectedIDs.filter(function (id) {
+	    var entity = context.graph().hasEntity(id);
+	    return entity && entity.type === 'way';
+	  });
 
-	function Entity() {
-	}Entity.prototype.nodeType = ENTITY_NODE;
-	_extends(Entity,Node);
+	  var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;
 
-	function EntityReference() {
-	}EntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;
-	_extends(EntityReference,Node);
+	  var _action = actionSplit(_vertexIds);
 
-	function DocumentFragment() {
-	}DocumentFragment.prototype.nodeName =	"#document-fragment";
-	DocumentFragment.prototype.nodeType =	DOCUMENT_FRAGMENT_NODE;
-	_extends(DocumentFragment,Node);
+	  var _ways = [];
+	  var _geometry = 'feature';
+	  var _waysAmount = 'single';
 
+	  var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';
 
-	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
-	}
+	  if (_isAvailable) {
+	    if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
+	    _ways = _action.ways(context.graph());
+	    var geometries = {};
 
-	//if(typeof require == 'function'){
-		var DOMImplementation_1 = DOMImplementation;
-		var XMLSerializer_1 = XMLSerializer$1;
-	//}
+	    _ways.forEach(function (way) {
+	      geometries[way.geometry(context.graph())] = true;
+	    });
 
-	var dom = {
-		DOMImplementation: DOMImplementation_1,
-		XMLSerializer: XMLSerializer_1
-	};
+	    if (Object.keys(geometries).length === 1) {
+	      _geometry = Object.keys(geometries)[0];
+	    }
 
-	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;
-	}
+	    _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
+	  }
 
-	//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;
-		}
-	}
+	  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
 
-	/*
-	 * @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};
-	});
+	    var idsToSelect = _vertexIds.concat(difference.extantIDs().filter(function (id) {
+	      // filter out relations that may have had member additions
+	      return context.entity(id).type === 'way';
+	    }));
 
-	/* 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
+	    context.enter(modeSelect(context, idsToSelect));
+	  };
 
-	//if(typeof require == 'function'){
-		var XMLReader = sax.XMLReader;
-		var DOMImplementation = exports.DOMImplementation = dom.DOMImplementation;
-		exports.XMLSerializer = dom.XMLSerializer ;
-		exports.DOMParser = DOMParser;
-	//}
-	});
+	  operation.relatedEntityIds = function () {
+	    return _selectedWayIds.length ? [] : _ways.map(function (way) {
+	      return way.id;
+	    });
+	  };
 
-	var togeojson = createCommonjsModule(function (module, exports) {
-	var toGeoJSON = (function() {
+	  operation.available = function () {
+	    return _isAvailable;
+	  };
 
-	    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
-	        };
-	    }
+	  operation.disabled = function () {
+	    var reason = _action.disabled(context.graph());
 
-	    // create a new feature collection parent object
-	    function fc() {
-	        return {
-	            type: 'FeatureCollection',
-	            features: []
-	        };
+	    if (reason) {
+	      return reason;
+	    } else if (selectedIDs.some(context.hasHiddenConnections)) {
+	      return 'connected_to_hidden';
 	    }
 
-	    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);
-	    }
+	    return false;
+	  };
 
-	    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;
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    if (disable) return _t('operations.split.' + disable);
+	    return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
+	  };
 
-	            }
-	            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;
-	                    }
+	  operation.annotation = function () {
+	    return _t('operations.split.annotation.' + _geometry, {
+	      n: _ways.length
+	    });
+	  };
 
-	                    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');
+	  operation.id = 'split';
+	  operation.keys = [_t('operations.split.key')];
+	  operation.title = _t('operations.split.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	                    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;
-	})();
+	function operationStraighten(context, selectedIDs) {
+	  var _wayIDs = selectedIDs.filter(function (id) {
+	    return id.charAt(0) === 'w';
+	  });
 
-	{ module.exports = toGeoJSON; }
-	});
+	  var _nodeIDs = selectedIDs.filter(function (id) {
+	    return id.charAt(0) === 'n';
+	  });
 
-	var _initialized = false;
-	var _enabled = false;
-	var _geojson;
+	  var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';
 
+	  var _nodes = utilGetAllNodes(selectedIDs, context.graph());
 
-	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;
+	  var _coords = _nodes.map(function (n) {
+	    return n.loc;
+	  });
+
+	  var _extent = utilTotalExtent(selectedIDs, context.graph());
 
+	  var _action = chooseAction();
+
+	  var _geometry;
 
-	    function init() {
-	        if (_initialized) { return; }  // run once
+	  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 = [];
 
-	        _geojson = {};
-	        _enabled = true;
+	      for (var i = 0; i < selectedIDs.length; i++) {
+	        var entity = context.entity(selectedIDs[i]);
 
-	        function over() {
-	            event.stopPropagation();
-	            event.preventDefault();
-	            event.dataTransfer.dropEffect = 'copy';
+	        if (entity.type === 'node') {
+	          continue;
+	        } else if (entity.type !== 'way' || entity.isClosed()) {
+	          return null; // exit early, can't straighten these
 	        }
 
-	        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);
+	        startNodeIDs.push(entity.first());
+	        endNodeIDs.push(entity.last());
+	      } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
 
-	        _initialized = true;
-	    }
 
+	      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)
 
-	    function getService() {
-	        if (services.vectorTile && !_vtService) {
-	            _vtService = services.vectorTile;
-	            _vtService.event.on('loadedData', throttledRedraw);
-	        } else if (!services.vectorTile && _vtService) {
-	            _vtService = null;
-	        }
+	      if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes
 
-	        return _vtService;
-	    }
+	      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
 
+	      if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;
 
-	    function showLayer() {
-	        layerOn();
+	      if (_nodeIDs.length) {
+	        // If we're only straightenting between two points, we only need that extent visible
+	        _extent = utilTotalExtent(_nodeIDs, context.graph());
+	      }
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
+	      _geometry = 'line';
+	      return actionStraightenWay(selectedIDs, context.projection);
 	    }
 
+	    return null;
+	  }
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	  function operation() {
+	    if (!_action) return;
+	    context.perform(_action, operation.annotation());
+	    window.setTimeout(function () {
+	      context.validator().validate();
+	    }, 300); // after any transition
+	  }
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', layerOff);
-	    }
+	  operation.available = function () {
+	    return Boolean(_action);
+	  };
 
+	  operation.disabled = function () {
+	    var reason = _action.disabled(context.graph());
 
-	    function layerOn() {
-	        layer.style('display', 'block');
+	    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 layerOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
-	    }
-
+	    function someMissing() {
+	      if (context.inIntro()) return false;
+	      var osm = context.connection();
 
-	    // ensure that all geojson features in a collection have IDs
-	    function ensureIDs(gj) {
-	        if (!gj) { return null; }
+	      if (osm) {
+	        var missing = _coords.filter(function (loc) {
+	          return !osm.isDataLoaded(loc);
+	        });
 
-	        if (gj.type === 'FeatureCollection') {
-	            for (var i = 0; i < gj.features.length; i++) {
-	                ensureFeatureID(gj.features[i]);
-	            }
-	        } else {
-	            ensureFeatureID(gj);
+	        if (missing.length) {
+	          missing.forEach(function (loc) {
+	            context.loadTileAtLoc(loc);
+	          });
+	          return true;
 	        }
-	        return gj;
+	      }
+
+	      return false;
 	    }
+	  };
 
+	  operation.tooltip = function () {
+	    var disable = operation.disabled();
+	    return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
+	  };
 
-	    // ensure that each single Feature object has a unique ID
-	    function ensureFeatureID(feature) {
-	        if (!feature) { return; }
-	        feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
-	        return feature;
-	    }
+	  operation.annotation = function () {
+	    return _t('operations.straighten.annotation.' + _geometry, {
+	      n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
+	    });
+	  };
 
+	  operation.id = 'straighten';
+	  operation.keys = [_t('operations.straighten.key')];
+	  operation.title = _t('operations.straighten.title');
+	  operation.behavior = behaviorOperation(context).which(operation);
+	  return operation;
+	}
 
-	    // Prefer an array of Features instead of a FeatureCollection
-	    function getFeatures(gj) {
-	        if (!gj) { return []; }
+	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
+	});
 
-	        if (gj.type === 'FeatureCollection') {
-	            return gj.features;
-	        } else {
-	            return [gj];
-	        }
-	    }
+	var _relatedParent;
 
+	function modeSelect(context, selectedIDs) {
+	  var mode = {
+	    id: 'select',
+	    button: 'browse'
+	  };
+	  var keybinding = utilKeybinding('select');
 
-	    function featureKey(d) {
-	        return d.__featurehash__;
-	    }
+	  var _breatheBehavior = behaviorBreathe();
 
+	  var _modeDragNode = modeDragNode(context);
 
-	    function isPolygon(d) {
-	        return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
-	    }
+	  var _selectBehavior;
 
+	  var _behaviors = [];
+	  var _operations = [];
+	  var _newFeature = false;
+	  var _follow = false;
 
-	    function clipPathID(d) {
-	        return 'ideditor-data-' + d.__featurehash__ + '-clippath';
+	  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);
+	  }
 
-	    function featureClasses(d) {
-	        return [
-	            'data' + d.__featurehash__,
-	            d.geometry.type,
-	            isPolygon(d) ? 'area' : '',
-	            d.__layerID__ || ''
-	        ].filter(Boolean).join(' ');
-	    }
+	  function checkSelectedIDs() {
+	    var ids = [];
 
+	    if (Array.isArray(selectedIDs)) {
+	      ids = selectedIDs.filter(function (id) {
+	        return context.hasEntity(id);
+	      });
+	    }
 
-	    function drawData(selection) {
-	        var vtService = getService();
-	        var getPath = svgPath(projection).geojson;
-	        var getAreaPath = svgPath(projection, null, true).geojson;
-	        var hasData = drawData.hasData();
+	    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;
+	    }
 
-	        layer = selection.selectAll('.layer-mapdata')
-	            .data(_enabled && hasData ? [0] : []);
+	    selectedIDs = ids;
+	    return true;
+	  } // find the common parent ways for nextVertex, previousVertex
 
-	        layer.exit()
-	            .remove();
 
-	        layer = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapdata')
-	            .merge(layer);
+	  function commonParents() {
+	    var graph = context.graph();
+	    var commonParents = [];
 
-	        var surface = context.surface();
-	        if (!surface || surface.empty()) { return; }  // not ready to draw yet, starting up
+	    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 vertices
+	      }
 
-	        // 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);
+	      var currParents = graph.parentWays(entity).map(function (w) {
+	        return w.id;
+	      });
 
+	      if (!commonParents.length) {
+	        commonParents = currParents;
+	        continue;
+	      }
 
-	        // Draw clip paths for polygons
-	        var clipPaths = surface.selectAll('defs').selectAll('.clipPath-data')
-	           .data(polygonData, featureKey);
+	      commonParents = utilArrayIntersection(commonParents, currParents);
 
-	        clipPaths.exit()
-	           .remove();
+	      if (!commonParents.length) {
+	        return [];
+	      }
+	    }
 
-	        var clipPathsEnter = clipPaths.enter()
-	           .append('clipPath')
-	           .attr('class', 'clipPath-data')
-	           .attr('id', clipPathID);
+	    return commonParents;
+	  }
 
-	        clipPathsEnter
-	           .append('path');
+	  function singularParent() {
+	    var parents = commonParents();
 
-	        clipPaths.merge(clipPathsEnter)
-	           .selectAll('path')
-	           .attr('d', getAreaPath);
+	    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.
 
 
-	        // Draw fill, shadow, stroke layers
-	        var datagroups = layer
-	            .selectAll('g.datagroup')
-	            .data(['fill', 'shadow', 'stroke']);
+	    if (parents.length === 1) {
+	      _relatedParent = parents[0]; // remember this parent for later
 
-	        datagroups = datagroups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'datagroup datagroup-' + d; })
-	            .merge(datagroups);
+	      return _relatedParent;
+	    }
 
+	    if (parents.indexOf(_relatedParent) !== -1) {
+	      return _relatedParent; // prefer the previously seen parent
+	    }
 
-	        // Draw paths
-	        var pathData = {
-	            fill: polygonData,
-	            shadow: geoData,
-	            stroke: geoData
-	        };
+	    return parents[0];
+	  }
 
-	        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);
-	            });
+	  mode.selectedIDs = function (val) {
+	    if (!arguments.length) return selectedIDs;
+	    selectedIDs = val;
+	    return mode;
+	  };
 
+	  mode.zoomToSelected = function () {
+	    context.map().zoomToEase(selectedEntities());
+	  };
 
-	        // Draw labels
-	        layer
-	            .call(drawLabels, 'label-halo', geoData)
-	            .call(drawLabels, 'label', geoData);
+	  mode.newFeature = function (val) {
+	    if (!arguments.length) return _newFeature;
+	    _newFeature = val;
+	    return mode;
+	  };
 
+	  mode.selectBehavior = function (val) {
+	    if (!arguments.length) return _selectBehavior;
+	    _selectBehavior = val;
+	    return mode;
+	  };
 
-	        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);
-	            });
+	  mode.follow = function (val) {
+	    if (!arguments.length) return _follow;
+	    _follow = val;
+	    return mode;
+	  };
 
-	            var labels = selection.selectAll('text.' + textClass)
-	                .data(labelData, featureKey);
+	  function loadOperations() {
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.uninstall(operation.behavior);
+	      }
+	    });
 
-	            // exit
-	            labels.exit()
-	                .remove();
+	    _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();
+	    });
 
-	            // 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];
-	                });
-	        }
-	    }
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.install(operation.behavior);
+	      }
+	    }); // remove any displayed menu
 
 
-	    function getExtension(fileName) {
-	        if (!fileName) { return; }
+	    context.ui().closeEditMenu();
+	  }
 
-	        var re = /\.(gpx|kml|(geo)?json)$/i;
-	        var match = fileName.toLowerCase().match(re);
-	        return match && match.length && match[0];
-	    }
+	  mode.operations = function () {
+	    return _operations;
+	  };
 
+	  mode.enter = function () {
+	    if (!checkSelectedIDs()) return;
+	    context.features().forceVisible(selectedIDs);
 
-	    function xmlToDom(textdata) {
-	        return (new DOMParser()).parseFromString(textdata, 'text/xml');
-	    }
+	    _modeDragNode.restoreSelectedIDs(selectedIDs);
 
+	    loadOperations();
 
-	    drawData.setFile = function(extension, data) {
-	        _template = null;
-	        _fileList = null;
-	        _geojson = null;
-	        _src = null;
+	    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];
+	    }
 
-	        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;
-	        }
+	    _behaviors.forEach(context.install);
 
-	        gj = gj || {};
-	        if (Object.keys(gj).length) {
-	            _geojson = ensureIDs(gj);
-	            _src = extension + ' data file';
-	            this.fitZoom();
-	        }
+	    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
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	      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();
 
-	    drawData.showLabels = function(val) {
-	        if (!arguments.length) { return _showLabels; }
+	    if (_follow) {
+	      var extent = geoExtent();
+	      var graph = context.graph();
+	      selectedIDs.forEach(function (id) {
+	        var entity = context.entity(id);
 
-	        _showLabels = val;
-	        return this;
-	    };
+	        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
 
+	      _follow = false;
+	    }
 
-	    drawData.enabled = function(val) {
-	        if (!arguments.length) { return _enabled; }
+	    function nudgeSelection(delta) {
+	      return function () {
+	        // prevent nudging during low zoom selection
+	        if (!context.map().withinEditableZoom()) return;
+	        var moveOp = operationMove(context, selectedIDs);
 
-	        _enabled = val;
-	        if (_enabled) {
-	            showLayer();
+	        if (moveOp.disabled()) {
+	          context.ui().flash.duration(4000).iconName('#iD-operation-' + moveOp.id).iconClass('operation disabled').label(moveOp.tooltip)();
 	        } else {
-	            hideLayer();
+	          context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
+	          context.validator().validate();
 	        }
+	      };
+	    }
 
-	        dispatch.call('change');
-	        return this;
-	    };
-
+	    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';
+	          }
 
-	    drawData.hasData = function() {
-	        var gj = _geojson || {};
-	        return !!(_template || Object.keys(gj).length);
-	    };
+	          return false;
 
+	          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);
+	          }
 
-	    drawData.template = function(val, src) {
-	        if (!arguments.length) { return _template; }
+	          function someMissing() {
+	            if (context.inIntro()) return false;
+	            var osm = context.connection();
 
-	        // 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 (osm) {
+	              var missing = nodes.filter(function (n) {
+	                return !osm.isDataLoaded(n.loc);
+	              });
 
-	            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 */
-	                }
+	              if (missing.length) {
+	                missing.forEach(function (loc) {
+	                  context.loadTileAtLoc(loc);
+	                });
+	                return true;
+	              }
 	            }
 
-	            // ensure at least one test was run.
-	            if (!tested) {
-	                regex = new RegExp('.*\.google(apis)?\..*/(vt|kh)[\?/].*([xyz]=.*){3}.*');
-	                fail = regex.test(val);
-	            }
+	            return false;
+	          }
+
+	          function incompleteRelation(id) {
+	            var entity = context.entity(id);
+	            return entity.type === 'relation' && !entity.isComplete(context.graph());
+	          }
 	        }
 
-	        _template = val;
-	        _fileList = null;
-	        _geojson = null;
+	        var disabled = scalingDisabled();
 
-	        // strip off the querystring/hash from the template,
-	        // it often includes the access token
-	        _src = src || ('vectortile:' + val.split(/[?#]/)[0]);
+	        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();
+	        }
+	      };
+	    }
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	    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'));
+	      }
+	    }
 
+	    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();
 
-	    drawData.geojson = function(gj, src) {
-	        if (!arguments.length) { return _geojson; }
+	      if (_relatedParent) {
+	        surface.selectAll(utilEntitySelector([_relatedParent])).classed('related', true);
+	      }
 
-	        _template = null;
-	        _fileList = null;
-	        _geojson = null;
-	        _src = 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);
+	      }
+	    }
 
-	        gj = gj || {};
-	        if (Object.keys(gj).length) {
-	            _geojson = ensureIDs(gj);
-	            _src = src || 'unknown.geojson';
-	        }
+	    function esc() {
+	      if (context.container().select('.combobox').size()) return;
+	      context.enter(modeBrowse(context));
+	    }
 
-	        dispatch.call('change');
-	        return this;
-	    };
+	    function firstVertex(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);
+	      }
 
-	    drawData.fileList = function(fileList) {
-	        if (!arguments.length) { return _fileList; }
+	      if (way) {
+	        context.enter(modeSelect(context, [way.first()]).follow(true));
+	      }
+	    }
 
-	        _template = null;
-	        _fileList = fileList;
-	        _geojson = null;
-	        _src = null;
+	    function lastVertex(d3_event) {
+	      d3_event.preventDefault();
+	      var entity = singular();
+	      var parent = singularParent();
+	      var way;
 
-	        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);
-	            };
-	        })();
+	      if (entity && entity.type === 'way') {
+	        way = entity;
+	      } else if (parent) {
+	        way = context.entity(parent);
+	      }
 
-	        reader.readAsText(f);
+	      if (way) {
+	        context.enter(modeSelect(context, [way.last()]).follow(true));
+	      }
+	    }
 
-	        return this;
-	    };
+	    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;
+	      }
 
-	    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 */
-	                });
+	      if (index !== -1) {
+	        context.enter(modeSelect(context, [way.nodes[index]]).follow(true));
+	      }
+	    }
 
-	        } else {
-	            drawData.template(url);
-	        }
+	    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;
 
-	        return this;
-	    };
+	      if (curr < length - 1) {
+	        index = curr + 1;
+	      } else if (way.isClosed()) {
+	        index = 0;
+	      }
 
+	      if (index !== -1) {
+	        context.enter(modeSelect(context, [way.nodes[index]]).follow(true));
+	      }
+	    }
 
-	    drawData.getSrc = function() {
-	        return _src || '';
-	    };
+	    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];
+	      }
 
-	    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 */
+	      var surface = context.surface();
+	      surface.selectAll('.related').classed('related', false);
 
-	            return utilArrayUnion(coords, c);
-	        }, []);
+	      if (_relatedParent) {
+	        surface.selectAll(utilEntitySelector([_relatedParent])).classed('related', true);
+	      }
+	    }
+	  };
 
-	        if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
-	            var extent = geoExtent(d3_geoBounds({ type: 'LineString', coordinates: coords }));
-	            map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
-	        }
+	  mode.exit = function () {
+	    _newFeature = false;
 
-	        return this;
-	    };
+	    _operations.forEach(function (operation) {
+	      if (operation.behavior) {
+	        context.uninstall(operation.behavior);
+	      }
+	    });
+
+	    _operations = [];
+
+	    _behaviors.forEach(context.uninstall);
 
+	    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'));
+	    }
+	  };
 
-	    init();
-	    return drawData;
+	  return mode;
 	}
 
-	function svgDebug(projection, context) {
+	function uiLasso(context) {
+	  var group, polygon;
+	  lasso.coordinates = [];
 
-	  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');
+	  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));
+	  }
 
-	    var debugData = [];
-	    if (showTile) {
-	      debugData.push({ class: 'red', label: 'tile' });
-	    }
-	    if (showCollision) {
-	      debugData.push({ class: 'yellow', label: 'collision' });
-	    }
-	    if (showImagery) {
-	      debugData.push({ class: 'orange', label: 'imagery' });
-	    }
-	    if (showTouchTargets) {
-	      debugData.push({ class: 'pink', label: 'touchTargets' });
+	  function draw() {
+	    if (polygon) {
+	      polygon.data([lasso.coordinates]).attr('d', function (d) {
+	        return 'M' + d.join(' L') + ' Z';
+	      });
 	    }
-	    if (showDownloaded) {
-	      debugData.push({ class: 'purple', label: 'downloaded' });
+	  }
+
+	  lasso.extent = function () {
+	    return lasso.coordinates.reduce(function (extent, point) {
+	      return extent.extend(geoExtent(point));
+	    }, geoExtent());
+	  };
+
+	  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();
+	      }));
 	    }
 
+	    context.container().classed('lasso', false);
+	  };
 
-	    var legend = context.container().select('.main-content')
-	      .selectAll('.debug-legend')
-	      .data(debugData.length ? [0] : []);
+	  return lasso;
+	}
 
-	    legend.exit()
-	      .remove();
+	function behaviorLasso(context) {
+	  // use pointer events on supported platforms; fallback to mouse events
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	    legend = legend.enter()
-	      .append('div')
-	      .attr('class', 'fillD debug-legend')
-	      .merge(legend);
+	  var behavior = function behavior(selection) {
+	    var lasso;
 
+	    function pointerdown(d3_event) {
+	      var button = 0; // left
 
-	    var legendItems = legend.selectAll('.debug-legend-item')
-	      .data(debugData, function (d) { return d.label; });
+	      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();
+	      }
+	    }
 
-	    legendItems.exit()
-	      .remove();
+	    function pointermove() {
+	      if (!lasso) {
+	        lasso = uiLasso(context);
+	        context.surface().call(lasso);
+	      }
 
-	    legendItems.enter()
-	      .append('span')
-	      .attr('class', function (d) { return ("debug-legend-item " + (d.class)); })
-	      .text(function (d) { return d.label; });
+	      lasso.p(context.map().mouse());
+	    }
 
+	    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 layer = selection.selectAll('.layer-debug')
-	      .data(showImagery || showDownloaded ? [0] : []);
+	    function lassoed() {
+	      if (!lasso) return [];
+	      var graph = context.graph();
+	      var limitToNodes;
 
-	    layer.exit()
-	      .remove();
+	      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 [];
+	      }
 
-	    layer = layer.enter()
-	      .append('g')
-	      .attr('class', 'layer-debug')
-	      .merge(layer);
+	      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
 
+	      intersects.sort(function (node1, node2) {
+	        var parents1 = graph.parentWays(node1);
+	        var parents2 = graph.parentWays(node2);
 
-	    // 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 (parents1.length && parents2.length) {
+	          // both nodes are vertices
+	          var sharedParents = utilArrayIntersection(parents1, parents2);
 
-	        var imagery = layer.selectAll('path.debug-imagery')
-	          .data(features);
+	          if (sharedParents.length) {
+	            var sharedParentNodes = sharedParents[0].nodes; // vertices are members of the same way; sort them in their listed order
 
-	        imagery.exit()
-	          .remove();
+	            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
 
-	        imagery.enter()
-	          .append('path')
-	          .attr('class', 'debug-imagery debug orange');
-	      })
-	      .catch(function () { /* ignore */ });
 
-	    // 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 ]
-	            ]]
-	          }
-	        };
+	        return node1.loc[0] - node2.loc[0];
+	      });
+	      return intersects.map(function (entity) {
+	        return entity.id;
 	      });
 	    }
 
-	    var downloaded = layer
-	      .selectAll('path.debug-downloaded')
-	      .data(showDownloaded ? dataDownloaded : []);
+	    function pointerup() {
+	      select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
+	      if (!lasso) return;
+	      var ids = lassoed();
+	      lasso.close();
 
-	    downloaded.exit()
-	      .remove();
+	      if (ids.length) {
+	        context.enter(modeSelect(context, ids));
+	      }
+	    }
 
-	    downloaded.enter()
-	      .append('path')
-	      .attr('class', 'debug-downloaded debug purple');
+	    selection.on(_pointerPrefix + 'down.lasso', pointerdown);
+	  };
 
-	    // update
-	    layer.selectAll('path')
-	      .attr('d', svgPath(projection).geojson);
-	  }
+	  behavior.off = function (selection) {
+	    selection.on(_pointerPrefix + 'down.lasso', null);
+	  };
 
+	  return behavior;
+	}
 
-	  // 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;
-	    }
+	function modeBrowse(context) {
+	  var mode = {
+	    button: 'browse',
+	    id: 'browse',
+	    title: _t('modes.browse.title'),
+	    description: _t('modes.browse.description')
 	  };
+	  var sidebar;
 
+	  var _selectBehavior;
 
-	  return drawDebug;
-	}
+	  var _behaviors = [];
 
-	var _layerEnabled = false;
-	var _qaService;
+	  mode.selectBehavior = function (val) {
+	    if (!arguments.length) return _selectBehavior;
+	    _selectBehavior = val;
+	    return mode;
+	  };
 
-	function svgKeepRight(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-	  var minZoom = 12;
+	  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 touchLayer = select(null);
-	  var drawLayer = select(null);
-	  var layerVisible = false;
+	    _behaviors.forEach(context.install); // Get focus on the body.
 
-	  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.
-	  function getService() {
-	    if (services.keepRight && !_qaService) {
-	      _qaService = services.keepRight;
-	      _qaService.on('loaded', throttledRedraw);
-	    } else if (!services.keepRight && _qaService) {
-	      _qaService = null;
+	    if (document.activeElement && document.activeElement.blur) {
+	      document.activeElement.blur();
 	    }
 
-	    return _qaService;
-	  }
-
-	  // Show the markers
-	  function editOn() {
-	    if (!layerVisible) {
-	      layerVisible = true;
-	      drawLayer
-	        .style('display', 'block');
+	    if (sidebar) {
+	      context.ui().sidebar.show(sidebar);
+	    } else {
+	      context.ui().sidebar.select(null);
 	    }
-	  }
+	  };
 
-	  // 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();
+	  mode.exit = function () {
+	    context.ui().sidebar.hover.cancel();
+
+	    _behaviors.forEach(context.uninstall);
+
+	    if (sidebar) {
+	      context.ui().sidebar.hide();
 	    }
-	  }
+	  };
 
-	  // Enable the layer.  This shows the markers and transitions them to visible.
-	  function layerOn() {
-	    editOn();
+	  mode.sidebar = function (_) {
+	    if (!arguments.length) return sidebar;
+	    sidebar = _;
+	    return mode;
+	  };
 
-	    drawLayer
-	      .style('opacity', 0)
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 1)
-	      .on('end interrupt', function () { return dispatch.call('change'); });
-	  }
+	  mode.operations = function () {
+	    return [operationPaste(context)];
+	  };
 
-	  // 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');
-	      });
+	  return mode;
+	}
+
+	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);
 	  }
 
-	  // Update the issue markers
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled) { return; }
+	  behavior.off = function (surface) {
+	    surface.call(draw.off);
+	  };
 
-	    var service = getService();
-	    var selectedID = context.selectedErrorID();
-	    var data = (service ? service.getItems(projection) : []);
-	    var getTransform = svgPointTransform(projection);
+	  behavior.cancel = function () {
+	    window.setTimeout(function () {
+	      context.map().dblclickZoomEnable(true);
+	    }, 1000);
+	    context.enter(modeBrowse(context));
+	  };
 
-	    // Draw markers..
-	    var markers = drawLayer.selectAll('.qaItem.keepRight')
-	      .data(data, function (d) { return d.id; });
+	  return utilRebind(behavior, dispatch$1, 'on');
+	}
 
-	    // exit
-	    markers.exit()
-	      .remove();
+	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);
+	    });
 
-	    // 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');
+	    if (selected.length) {
+	      newParams.id = selected.join(',');
+	    }
 
-	    // update
-	    markers
-	      .merge(markersEnter)
-	      .sort(sortY)
-	        .classed('selected', function (d) { return d.id === selectedID; })
-	        .attr('transform', getTransform);
+	    newParams.map = zoom.toFixed(2) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+	    return Object.assign(oldParams, newParams);
+	  }
 
+	  function computedHash() {
+	    return '#' + utilQsString(computedHashParameters(), true);
+	  }
 
-	    // Draw targets..
-	    if (touchLayer.empty()) { return; }
-	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	  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);
+	    });
 
-	    var targets = touchLayer.selectAll('.qaItem.keepRight')
-	      .data(data, function (d) { return d.id; });
+	    if (selected.length) {
+	      var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
 
-	    // exit
-	    targets.exit()
-	      .remove();
+	      if (selected.length > 1) {
+	        contextual = _t('title.labeled_and_more', {
+	          labeled: firstLabel,
+	          count: selected.length - 1
+	        });
+	      } else {
+	        contextual = firstLabel;
+	      }
 
-	    // 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);
+	      titleID = 'context';
+	    }
 
+	    if (includeChangeCount) {
+	      changeCount = context.history().difference().summary().length;
 
-	    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];
+	      if (changeCount > 0) {
+	        titleID = contextual ? 'changes_context' : 'changes';
+	      }
+	    }
+
+	    if (titleID) {
+	      return _t('title.format.' + titleID, {
+	        changes: changeCount,
+	        base: baseTitle,
+	        context: contextual
+	      });
 	    }
+
+	    return baseTitle;
 	  }
 
-	  // Draw the keepRight layer and schedule loading issues and updating markers.
-	  function drawKeepRight(selection) {
-	    var service = getService();
+	  function updateTitle(includeChangeCount) {
+	    if (!context.setsDocumentTitle()) return;
+	    var newTitle = computedTitle(includeChangeCount);
 
-	    var surface = context.surface();
-	    if (surface && !surface.empty()) {
-	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    if (document.title !== newTitle) {
+	      document.title = newTitle;
 	    }
+	  }
 
-	    drawLayer = selection.selectAll('.layer-keepRight')
-	      .data(service ? [0] : []);
+	  function updateHashIfNeeded() {
+	    if (context.inIntro()) return;
+	    var latestHash = computedHash();
 
-	    drawLayer.exit()
-	      .remove();
+	    if (_cachedHash !== latestHash) {
+	      _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
+	      // though unavoidably creating a browser history entry
 
-	    drawLayer = drawLayer.enter()
-	      .append('g')
-	        .attr('class', 'layer-keepRight')
-	        .style('display', _layerEnabled ? 'block' : 'none')
-	      .merge(drawLayer);
+	      window.history.replaceState(null, computedTitle(false
+	      /* includeChangeCount */
+	      ), latestHash); // set the title we want displayed for the browser tab/window
 
-	    if (_layerEnabled) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        service.loadIssues(projection);
-	        updateMarkers();
-	      } else {
-	        editOff();
-	      }
+	      updateTitle(true
+	      /* includeChangeCount */
+	      );
 	    }
 	  }
 
-	  // Toggles the layer on and off
-	  drawKeepRight.enabled = function(val) {
-	    if (!arguments.length) { return _layerEnabled; }
+	  var _throttledUpdate = throttle(updateHashIfNeeded, 500);
 
-	    _layerEnabled = val;
-	    if (_layerEnabled) {
-	      layerOn();
+	  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 {
-	      layerOff();
-	      if (context.selectedErrorID()) {
+	      // 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);
+	        });
+
+	        if (ids.length && (mode.id === 'browse' || mode.id === 'select' && !utilArrayIdentical(mode.selectedIDs(), ids))) {
+	          context.enter(modeSelect(context, ids));
+	          return;
+	        }
+	      }
+
+	      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
+
+	      if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
 	        context.enter(modeBrowse(context));
+	        return;
 	      }
 	    }
+	  }
 
-	    dispatch.call('change');
-	    return this;
-	  };
+	  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);
 
-	  drawKeepRight.supported = function () { return !!getService(); };
+	    if (window.location.hash) {
+	      var q = utilStringQs(window.location.hash);
 
-	  return drawKeepRight;
-	}
+	      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 svgGeolocate(projection) {
-	    var layer = select(null);
-	    var _position;
+	      if (q.walkthrough === 'true') {
+	        behavior.startWalkthrough = true;
+	      }
 
+	      if (q.map) {
+	        behavior.hadHash = true;
+	      }
 
-	    function init() {
-	        if (svgGeolocate.initialized) { return; }  // run once
-	        svgGeolocate.enabled = false;
-	        svgGeolocate.initialized = true;
+	      hashchange();
+	      updateTitle(false);
 	    }
+	  }
 
-	    function showLayer() {
-	        layer.style('display', 'block');
-	    }
+	  behavior.off = function () {
+	    _throttledUpdate.cancel();
 
+	    _throttledUpdateTitle.cancel();
 
-	    function hideLayer() {
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0);
-	    }
+	    context.map().on('move.behaviorHash', null);
+	    context.on('enter.behaviorHash', null);
+	    select(window).on('hashchange.behaviorHash', null);
+	    window.location.hash = '';
+	  };
 
-	    function layerOn() {
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1);
+	  return behavior;
+	}
 
-	    }
+	/*
+	    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 layerOff() {
-	        layer.style('display', 'none');
+	function coreDifference(base, head) {
+	  var _changes = {};
+	  var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'
+
+	  var _diff = {};
+
+	  function checkEntityID(id) {
+	    var h = head.entities[id];
+	    var b = base.entities[id];
+	    if (h === b) return;
+	    if (_changes[id]) return;
+
+	    if (!h && b) {
+	      _changes[id] = {
+	        base: b,
+	        head: h
+	      };
+	      _didChange.deletion = true;
+	      return;
 	    }
 
-	    function transform(d) {
-	        return svgPointTransform(projection)(d);
+	    if (h && !b) {
+	      _changes[id] = {
+	        base: b,
+	        head: h
+	      };
+	      _didChange.addition = true;
+	      return;
 	    }
 
-	    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]]);
+	    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;
+	      }
 
-	        // southern most point will have higher pixel value...
-	       return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
+	      if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
+	        _changes[id] = {
+	          base: b,
+	          head: h
+	        };
+	        _didChange.properties = true;
+	      }
 	    }
+	  }
 
-	    function update() {
-	        var geolocation = { loc: [_position.coords.longitude, _position.coords.latitude] };
+	  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)));
 
-	        var groups = layer.selectAll('.geolocations').selectAll('.geolocation')
-	            .data([geolocation]);
+	    for (var i = 0; i < ids.length; i++) {
+	      checkEntityID(ids[i]);
+	    }
+	  }
 
-	        groups.exit()
-	            .remove();
+	  load();
 
-	        var pointsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'geolocation');
+	  _diff.length = function length() {
+	    return Object.keys(_changes).length;
+	  };
 
-	        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');
+	  _diff.changes = function changes() {
+	    return _changes;
+	  };
 
-	        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');
+	  _diff.didChange = _didChange; // pass true to include affected relation members
 
-	        groups.merge(pointsEnter)
-	            .attr('transform', transform);
+	  _diff.extantIDs = function extantIDs(includeRelMembers) {
+	    var result = new Set();
+	    Object.keys(_changes).forEach(function (id) {
+	      if (_changes[id].head) {
+	        result.add(id);
+	      }
 
-	        layer.select('.geolocate-radius').attr('r', accuracy(_position.coords.accuracy, geolocation.loc));
-	    }
+	      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);
+	          }
+	        });
+	      }
+	    });
+	    return Array.from(result);
+	  };
 
-	    function drawLocation(selection) {
-	        var enabled = svgGeolocate.enabled;
+	  _diff.modified = function modified() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (change.base && change.head) {
+	        result.push(change.head);
+	      }
+	    });
+	    return result;
+	  };
 
-	        layer = selection.selectAll('.layer-geolocate')
-	            .data([0]);
+	  _diff.created = function created() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (!change.base && change.head) {
+	        result.push(change.head);
+	      }
+	    });
+	    return result;
+	  };
 
-	        layer.exit()
-	            .remove();
+	  _diff.deleted = function deleted() {
+	    var result = [];
+	    Object.values(_changes).forEach(function (change) {
+	      if (change.base && !change.head) {
+	        result.push(change.base);
+	      }
+	    });
+	    return result;
+	  };
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-geolocate')
-	            .style('display', enabled ? 'block' : 'none');
+	  _diff.summary = function summary() {
+	    var relevant = {};
+	    var keys = Object.keys(_changes);
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'geolocations');
+	    for (var i = 0; i < keys.length; i++) {
+	      var change = _changes[keys[i]];
 
-	        layer = layerEnter
-	            .merge(layer);
+	      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);
 
-	        if (enabled) {
-	            update();
-	        } else {
-	            layerOff();
+	        if (moved) {
+	          addParents(change.head);
 	        }
-	    }
 
-	    drawLocation.enabled = function (position, enabled) {
-	        if (!arguments.length) { return svgGeolocate.enabled; }
-	        _position = position;
-	        svgGeolocate.enabled = enabled;
-	        if (svgGeolocate.enabled) {
-	            showLayer();
-	            layerOn();
-	        } else {
-	            hideLayer();
+	        if (retagged || moved && change.head.hasInterestingTags()) {
+	          addEntity(change.head, head, 'modified');
 	        }
-	        return this;
-	    };
+	      } 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');
+	      }
+	    }
 
-	    init();
-	    return drawLocation;
-	}
+	    return Object.values(relevant);
 
-	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;
-	        });
+	    function addEntity(entity, graph, changeType) {
+	      relevant[entity.id] = {
+	        entity: entity,
+	        graph: graph,
+	        changeType: changeType
+	      };
 	    }
 
+	    function addParents(entity) {
+	      var parents = head.parentWays(entity);
 
-	    function get(array, prop) {
-	        return function(d, i) { return array[i][prop]; };
+	      for (var j = parents.length - 1; j >= 0; j--) {
+	        var parent = parents[j];
+
+	        if (!(parent.id in relevant)) {
+	          addEntity(parent, head, 'modified');
+	        }
+	      }
 	    }
+	  }; // returns complete set of entities that require a redraw
+	  //  (optionally within given `extent`)
 
 
-	    function textWidth(text, size, elem) {
-	        var c = _textWidthCache[size];
-	        if (!c) { c = _textWidthCache[size] = {}; }
+	  _diff.complete = function complete(extent) {
+	    var result = {};
+	    var id, change;
 
-	        if (c[text]) {
-	            return c[text];
+	    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;
 
-	        } else if (elem) {
-	            c[text] = elem.getComputedTextLength();
-	            return c[text];
+	      if (entity.type === 'way') {
+	        var nh = h ? h.nodes : [];
+	        var nb = b ? b.nodes : [];
+	        var diff;
+	        diff = utilArrayDifference(nh, nb);
 
-	        } 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);
-	            }
+	        for (i = 0; i < diff.length; i++) {
+	          result[diff[i]] = head.hasEntity(diff[i]);
 	        }
-	    }
 
+	        diff = utilArrayDifference(nb, nh);
 
-	    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);
-	            });
-	    }
+	        for (i = 0; i < diff.length; i++) {
+	          result[diff[i]] = head.hasEntity(diff[i]);
+	        }
+	      }
 
+	      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);
 
-	    function drawAreaLabels(selection, entities, filter, classes, labels) {
-	        entities = entities.filter(hasText);
-	        labels = labels.filter(hasText);
-	        drawPointLabels(selection, entities, filter, classes, labels);
+	        for (i = 0; i < ids.length; i++) {
+	          var member = head.hasEntity(ids[i]);
+	          if (!member) continue; // not downloaded
 
-	        function hasText(d, i) {
-	            return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
+	          if (extent && !member.intersects(extent, head)) continue; // not visible
+
+	          result[ids[i]] = member;
 	        }
+	      }
+
+	      addParents(head.parentWays(entity), result);
+	      addParents(head.parentRelations(entity), result);
+	    }
+
+	    return result;
+
+	    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);
+	      }
 	    }
+	  };
 
+	  return _diff;
+	}
 
-	    function drawAreaIcons(selection, entities, filter, classes, labels) {
-	        var icons = selection.selectAll('use.' + classes)
-	            .filter(filter)
-	            .data(entities, osmEntity.key);
+	function coreTree(head) {
+	  // tree for entities
+	  var _rtree = new RBush();
 
-	        // exit
-	        icons.exit()
-	            .remove();
+	  var _bboxes = {}; // maintain a separate tree for granular way segments
 
-	        // 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;
+	  var _segmentsRTree = new RBush();
 
-	                if (!picon) {
-	                    return '';
-	                } else {
-	                    var isMaki = /^maki-/.test(picon);
-	                    return '#' + picon + (isMaki ? '-15' : '');
-	                }
-	            });
-	    }
+	  var _segmentsBBoxes = {};
+	  var _segmentsByWayId = {};
+	  var tree = {};
 
+	  function entityBBox(entity) {
+	    var bbox = entity.extent(head).bbox();
+	    bbox.id = entity.id;
+	    _bboxes[entity.id] = bbox;
+	    return bbox;
+	  }
 
-	    function drawCollisionBoxes(selection, rtree, which) {
-	        var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
+	  function segmentBBox(segment) {
+	    var extent = segment.extent(head); // extent can be null if the node entities aren't in the graph for some reason
 
-	        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]
-	                ]]};
-	            });
-	        }
+	    if (!extent) return null;
+	    var bbox = extent.bbox();
+	    bbox.segment = segment;
+	    _segmentsBBoxes[segment.id] = bbox;
+	    return bbox;
+	  }
 
-	        var boxes = selection.selectAll('.' + which)
-	            .data(gj);
+	  function removeEntity(entity) {
+	    _rtree.remove(_bboxes[entity.id]);
 
-	        // exit
-	        boxes.exit()
-	            .remove();
+	    delete _bboxes[entity.id];
 
-	        // enter/update
-	        boxes.enter()
-	            .append('path')
-	            .attr('class', classes)
-	            .merge(boxes)
-	            .attr('d', d3_geoPath());
-	    }
+	    if (_segmentsByWayId[entity.id]) {
+	      _segmentsByWayId[entity.id].forEach(function (segment) {
+	        _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
 
+	        delete _segmentsBBoxes[segment.id];
+	      });
 
-	    function drawLabels(selection, graph, entities, filter, dimensions, fullRedraw) {
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
+	      delete _segmentsByWayId[entity.id];
+	    }
+	  }
 
-	        var labelable = [];
-	        var renderNodeAs = {};
-	        var i, j, k, entity, geometry;
+	  function loadEntities(entities) {
+	    _rtree.load(entities.map(entityBBox));
 
-	        for (i = 0; i < labelStack.length; i++) {
-	            labelable.push([]);
-	        }
+	    var segments = [];
+	    entities.forEach(function (entity) {
+	      if (entity.segments) {
+	        var entitySegments = entity.segments(head); // cache these to make them easy to remove later
 
-	        if (fullRedraw) {
-	            _rdrawn.clear();
-	            _rskipped.clear();
-	            _entitybboxes = {};
+	        _segmentsByWayId[entity.id] = entitySegments;
+	        segments = segments.concat(entitySegments);
+	      }
+	    });
+	    if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
+	  }
 
-	        } 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]);
-	                }
-	            }
-	        }
+	  function updateParents(entity, insertions, memo) {
+	    head.parentWays(entity).forEach(function (way) {
+	      if (_bboxes[way.id]) {
+	        removeEntity(way);
+	        insertions[way.id] = way;
+	      }
 
-	        // Loop through all the entities to do some preprocessing
-	        for (i = 0; i < entities.length; i++) {
-	            entity = entities[i];
-	            geometry = entity.geometry(graph);
+	      updateParents(way, insertions, memo);
+	    });
+	    head.parentRelations(entity).forEach(function (relation) {
+	      if (memo[entity.id]) return;
+	      memo[entity.id] = true;
 
-	            // Insert collision boxes around interesting points/vertices
-	            if (geometry === 'point' || (geometry === 'vertex' && isInterestingVertex(entity))) {
-	                var hasDirections = entity.directions(graph, projection).length;
-	                var markerPadding;
+	      if (_bboxes[relation.id]) {
+	        removeEntity(relation);
+	        insertions[relation.id] = relation;
+	      }
 
-	                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;
-	                }
+	      updateParents(relation, insertions, memo);
+	    });
+	  }
 
-	                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
-	                };
+	  tree.rebase = function (entities, force) {
+	    var insertions = {};
 
-	                doInsert(bbox, entity.id + 'P');
-	            }
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (!entity.visible) continue;
 
-	            // From here on, treat vertices like points
-	            if (geometry === 'vertex') {
-	                geometry = 'point';
-	            }
+	      if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
+	        if (!force) {
+	          continue;
+	        } else if (_bboxes[entity.id]) {
+	          removeEntity(entity);
+	        }
+	      }
 
-	            // Determine which entities are label-able
-	            var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
-	            var icon = preset && !shouldSkipIcon(preset) && preset.icon;
+	      insertions[entity.id] = entity;
+	      updateParents(entity, insertions, {});
+	    }
 
-	            if (!icon && !utilDisplayName(entity))
-	                { continue; }
+	    loadEntities(Object.values(insertions));
+	    return tree;
+	  };
 
-	            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 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 = {};
 
-	                if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
-	                    labelable[k].push(entity);
-	                    break;
-	                }
-	            }
-	        }
+	    if (changed.deletion) {
+	      diff.deleted().forEach(function (entity) {
+	        removeEntity(entity);
+	      });
+	    }
 
-	        var positions = {
-	            point: [],
-	            line: [],
-	            area: []
-	        };
+	    if (changed.geometry) {
+	      diff.modified().forEach(function (entity) {
+	        removeEntity(entity);
+	        insertions[entity.id] = entity;
+	        updateParents(entity, insertions, {});
+	      });
+	    }
 
-	        var labelled = {
-	            point: [],
-	            line: [],
-	            area: []
-	        };
+	    if (changed.addition) {
+	      diff.created().forEach(function (entity) {
+	        insertions[entity.id] = entity;
+	      });
+	    }
 
-	        // Try and find a valid label for labellable entities
-	        for (k = 0; k < labelable.length; k++) {
-	            var fontSize = labelStack[k][3];
+	    loadEntities(Object.values(insertions));
+	  } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
 
-	            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;
+	  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`
 
-	                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);
+	  tree.waySegments = function (extent, graph) {
+	    updateToGraph(graph);
+	    return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
+	      return bbox.segment;
+	    });
+	  };
 
-	                } else if (geometry === 'line') {
-	                    p = getLineLabel(entity, width, fontSize);
+	  return tree;
+	}
 
-	                } else if (geometry === 'area') {
-	                    p = getAreaLabel(entity, width, fontSize);
-	                }
+	function uiModal(selection, blocking) {
+	  var _this = this;
 
-	                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);
-	                }
-	            }
-	        }
+	  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 isInterestingVertex(entity) {
-	            var selectedIDs = context.selectedIDs();
+	  var modal = shaded.append('div').attr('class', 'modal fillL');
+	  modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);
 
-	            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;
-	                });
-	        }
+	  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);
+	  }
 
+	  modal.append('div').attr('class', 'content');
+	  modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);
 
-	        function getPointLabel(entity, width, height, geometry) {
-	            var y = (geometry === 'point' ? -12 : 0);
-	            var pointOffsets = {
-	                ltr: [15, y, 'start'],
-	                rtl: [-15, y, 'end']
-	            };
+	  if (animate) {
+	    shaded.transition().style('opacity', 1);
+	  } else {
+	    shaded.style('opacity', 1);
+	  }
 
-	            var textDirection = _mainLocalizer.textDirection();
+	  return shaded;
 
-	            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]
-	            };
+	  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();
 
-	            // 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 (node) {
+	      node.focus();
+	    } else {
+	      select(this).node().blur();
+	    }
+	  }
 
-	            if (tryInsert([bbox], entity.id, true)) {
-	                return p;
-	            }
-	        }
+	  function moveFocusToLast() {
+	    var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();
 
+	    if (nodes.length) {
+	      nodes[nodes.length - 1].focus();
+	    } else {
+	      select(this).node().blur();
+	    }
+	  }
+	}
 
-	        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);
+	function uiLoading(context) {
+	  var _modalSelection = select(null);
 
-	            if (length < width + 20) { return; }
+	  var _message = '';
+	  var _blocking = false;
 
-	            // % 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;
+	  var loading = function loading(selection) {
+	    _modalSelection = uiModal(selection, _blocking);
 
-	            for (var i = 0; i < lineOffsets.length; i++) {
-	                var offset = lineOffsets[i];
-	                var middle = offset / 100 * length;
-	                var start = middle - width / 2;
+	    var loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');
 
-	                if (start < 0 || start + width > length) { continue; }
+	    loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
+	    loadertext.append('h3').html(_message);
 
-	                // 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;
-	                }
+	    _modalSelection.select('button.close').attr('class', 'hide');
 
-	                var isReverse = reverse(sub);
-	                if (isReverse) {
-	                    sub = sub.reverse();
-	                }
+	    return loading;
+	  };
 
-	                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)
-	                        });
-	                    }
-	                }
+	  loading.message = function (val) {
+	    if (!arguments.length) return _message;
+	    _message = val;
+	    return loading;
+	  };
 
-	                if (tryInsert(bboxes, entity.id, false)) {   // accept this one
-	                    return {
-	                        'font-size': height + 2,
-	                        lineString: lineString(sub),
-	                        startOffset: offset + '%'
-	                    };
-	                }
-	            }
+	  loading.blocking = function (val) {
+	    if (!arguments.length) return _blocking;
+	    _blocking = val;
+	    return loading;
+	  };
 
-	            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);
-	            }
+	  loading.close = function () {
+	    _modalSelection.remove();
+	  };
 
-	            function lineString(points) {
-	                return 'M' + points.join('L');
-	            }
+	  loading.isShown = function () {
+	    return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
+	  };
 
-	            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;
-	                }
+	  return loading;
+	}
 
-	                var result = points.slice(i0, i1);
-	                result.unshift(start);
-	                result.push(end);
-	                return result;
-	            }
-	        }
+	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 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 _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));
 
-	            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;
-	                }
-	            }
+	  var duration = 150;
+	  var _imageryUsed = [];
+	  var _photoOverlaysUsed = [];
+	  var _checkpoints = {};
 
+	  var _pausedGraph;
 
-	            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
-	                };
+	  var _stack;
 
-	                if (tryInsert([bbox], entity.id + 'I', true)) {
-	                    p.transform = 'translate(' + iconX + ',' + iconY + ')';
-	                    return true;
-	                }
-	                return false;
-	            }
+	  var _index;
 
-	            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;
-	            }
-	        }
+	  var _tree; // internal _act, accepts list of actions and eased time
 
 
-	        // force insert a singular bounding box
-	        // singular box only, no array, id better be unique
-	        function doInsert(bbox, id) {
-	            bbox.id = id;
+	  function _act(actions, t) {
+	    actions = Array.prototype.slice.call(actions);
+	    var annotation;
 
-	            var oldbox = _entitybboxes[id];
-	            if (oldbox) {
-	                _rdrawn.remove(oldbox);
-	            }
-	            _entitybboxes[id] = bbox;
-	            _rdrawn.insert(bbox);
-	        }
+	    if (typeof actions[actions.length - 1] !== 'function') {
+	      annotation = actions.pop();
+	    }
+
+	    var graph = _stack[_index].graph;
 
+	    for (var i = 0; i < actions.length; i++) {
+	      graph = actions[i](graph, t);
+	    }
 
-	        function tryInsert(bboxes, id, saveSkipped) {
-	            var skipped = false;
+	    return {
+	      graph: graph,
+	      annotation: annotation,
+	      imageryUsed: _imageryUsed,
+	      photoOverlaysUsed: _photoOverlaysUsed,
+	      transform: context.projection.transform(),
+	      selectedIDs: context.selectedIDs()
+	    };
+	  } // internal _perform with eased time
 
-	            for (var i = 0; i < bboxes.length; i++) {
-	                var bbox = bboxes[i];
-	                bbox.id = id;
 
-	                // 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;
-	                }
-	            }
+	  function _perform(args, t) {
+	    var previous = _stack[_index].graph;
+	    _stack = _stack.slice(0, _index + 1);
 
-	            _entitybboxes[id] = bboxes;
+	    var actionResult = _act(args, t);
 
-	            if (skipped) {
-	                if (saveSkipped) {
-	                    _rskipped.load(bboxes);
-	                }
-	            } else {
-	                _rdrawn.load(bboxes);
-	            }
+	    _stack.push(actionResult);
 
-	            return !skipped;
-	        }
+	    _index++;
+	    return change(previous);
+	  } // internal _replace with eased time
 
 
-	        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 _replace(args, t) {
+	    var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)
 
-	        var halo = layer.selectAll('.labels-group.halo');
-	        var label = layer.selectAll('.labels-group.label');
-	        var debug = layer.selectAll('.labels-group.debug');
+	    var actionResult = _act(args, t);
 
-	        // points
-	        drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
-	        drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point);
+	    _stack[_index] = actionResult;
+	    return change(previous);
+	  } // internal _overwrite with eased time
 
-	        // 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);
 
-	        // 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);
+	  function _overwrite(args, t) {
+	    var previous = _stack[_index].graph;
 
-	        // debug
-	        drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
-	        drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
+	    if (_index > 0) {
+	      _index--;
 
-	        layer.call(filterLabels);
+	      _stack.pop();
 	    }
 
+	    _stack = _stack.slice(0, _index + 1);
 
-	    function filterLabels(selection) {
-	        var drawLayer = selection.selectAll('.layer-osm.labels');
-	        var layers = drawLayer.selectAll('.labels-group.halo, .labels-group.label');
+	    var actionResult = _act(args, t);
 
-	        layers.selectAll('.nolabel')
-	            .classed('nolabel', false);
+	    _stack.push(actionResult);
 
-	        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]);
-	            }
-	        }
+	    _index++;
+	    return change(previous);
+	  } // determine difference and dispatch a change event
 
-	        layers.selectAll(utilEntitySelector(ids))
-	            .classed('nolabel', true);
 
+	  function change(previous) {
+	    var difference = coreDifference(previous, history.graph());
 
-	        // 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 (!_pausedGraph) {
+	      dispatch$1.call('change', this, difference);
+	    }
 
-	        var box = debug.selectAll('.debug-mouse')
-	            .data(gj);
+	    return difference;
+	  } // iD uses namespaced keys so multiple installations do not conflict
 
-	        // exit
-	        box.exit()
-	            .remove();
 
-	        // enter/update
-	        box.enter()
-	            .append('path')
-	            .attr('class', 'debug debug-mouse yellow')
-	            .merge(box)
-	            .attr('d', d3_geoPath());
-	    }
+	  function getKey(n) {
+	    return 'iD_' + window.location.origin + '_' + n;
+	  }
 
+	  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;
+	      });
 
-	    var throttleFilterLabels = throttle(filterLabels, 100);
+	      _stack[0].graph.rebase(entities, stack, false);
 
+	      _tree.rebase(entities, false);
 
-	    drawLabels.observe = function(selection) {
-	        var listener = function() { throttleFilterLabels(selection); };
-	        selection.on('mousemove.hidelabels', listener);
-	        context.on('enter.hidelabels', listener);
-	    };
+	      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;
+	      }
 
-	    drawLabels.off = function(selection) {
-	        throttleFilterLabels.cancel();
-	        selection.on('mousemove.hidelabels', null);
-	        context.on('enter.hidelabels', null);
-	    };
+	      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;
+	      }
 
-	    return drawLabels;
-	}
+	      while (n-- > 0 && _index > 0) {
+	        _index--;
 
-	var _layerEnabled$1 = false;
-	var _qaService$1;
+	        _stack.pop();
+	      }
 
-	function svgImproveOSM(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-	  var minZoom = 12;
+	      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;
 
-	  var touchLayer = select(null);
-	  var drawLayer = select(null);
-	  var layerVisible = false;
+	      while (_index > 0) {
+	        _index--;
+	        if (_stack[_index].annotation) break;
+	      }
 
-	  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');
-	  }
+	      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;
 
-	  // 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;
-	    }
+	      while (tryIndex < _stack.length - 1) {
+	        tryIndex++;
 
-	    return _qaService$1;
-	  }
+	        if (_stack[tryIndex].annotation) {
+	          _index = tryIndex;
+	          dispatch$1.call('redone', this, _stack[_index], previousStack);
+	          break;
+	        }
+	      }
 
-	  // Show the markers
-	  function editOn() {
-	    if (!layerVisible) {
-	      layerVisible = true;
-	      drawLayer
-	        .style('display', 'block');
-	    }
-	  }
+	      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;
 
-	  // 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();
-	    }
-	  }
+	      while (i >= 0) {
+	        if (_stack[i].annotation) return _stack[i].annotation;
+	        i--;
+	      }
+	    },
+	    redoAnnotation: function redoAnnotation() {
+	      var i = _index + 1;
 
-	  // Enable the layer.  This shows the markers and transitions them to visible.
-	  function layerOn() {
-	    editOn();
+	      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;
 
-	    drawLayer
-	      .style('opacity', 0)
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 1)
-	      .on('end interrupt', function () { return dispatch.call('change'); });
-	  }
+	      if (action) {
+	        head = action(head);
+	      }
 
-	  // 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');
-	      });
-	  }
+	      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();
 
-	  // Update the issue markers
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled$1) { return; }
+	        _stack.slice(1, _index + 1).forEach(function (state) {
+	          state.imageryUsed.forEach(function (source) {
+	            if (source !== 'Custom') {
+	              s.add(source);
+	            }
+	          });
+	        });
 
-	    var service = getService();
-	    var selectedID = context.selectedErrorID();
-	    var data = (service ? service.getItems(projection) : []);
-	    var getTransform = svgPointTransform(projection);
+	        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);
+	            });
+	          }
+	        });
 
-	    // Draw markers..
-	    var markers = drawLayer.selectAll('.qaItem.improveOSM')
-	      .data(data, function (d) { return d.id; });
+	        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 = {};
+	      }
 
-	    // exit
-	    markers.exit()
-	      .remove();
+	      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..
 
-	    // 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' : ''));
-	          }
-	        });
+	      Object.values(graph.base().entities).forEach(function (entity) {
+	        var copy = copyIntroEntity(entity);
+	        baseEntities[copy.id] = copy;
+	      }); // replace base entities with head entities..
 
-	    // update
-	    markers
-	      .merge(markersEnter)
-	      .sort(sortY)
-	        .classed('selected', function (d) { return d.id === selectedID; })
-	        .attr('transform', getTransform);
+	      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];
+	        }
+	      }); // swap temporary for permanent ids..
 
-	    // Draw targets..
-	    if (touchLayer.empty()) { return; }
-	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	      Object.values(baseEntities).forEach(function (entity) {
+	        if (Array.isArray(entity.nodes)) {
+	          entity.nodes = entity.nodes.map(function (node) {
+	            return permIDs[node] || node;
+	          });
+	        }
 
-	    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);
+	        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 sortY(a, b) {
-	      return (a.id === selectedID) ? 1
-	        : (b.id === selectedID) ? -1
-	        : b.loc[1] - a.loc[1];
-	    }
-	  }
+	      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`
 
-	  // Draw the ImproveOSM layer and schedule loading issues and updating markers.
-	  function drawImproveOSM(selection) {
-	    var service = getService();
+	        if (copy.tags && !Object.keys(copy.tags)) {
+	          delete copy.tags;
+	        }
 
-	    var surface = context.surface();
-	    if (surface && !surface.empty()) {
-	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	    }
+	        if (Array.isArray(copy.loc)) {
+	          copy.loc[0] = +copy.loc[0].toFixed(6);
+	          copy.loc[1] = +copy.loc[1].toFixed(6);
+	        }
 
-	    drawLayer = selection.selectAll('.layer-improveOSM')
-	      .data(service ? [0] : []);
+	        var match = source.id.match(/([nrw])-\d*/); // temporary id
 
-	    drawLayer.exit()
-	      .remove();
+	        if (match !== null) {
+	          var nrw = match[1];
+	          var permID;
 
-	    drawLayer = drawLayer.enter()
-	      .append('g')
-	        .attr('class', 'layer-improveOSM')
-	        .style('display', _layerEnabled$1 ? 'block' : 'none')
-	      .merge(drawLayer);
+	          do {
+	            permID = nrw + ++nextID[nrw];
+	          } while (baseEntities.hasOwnProperty(permID));
 
-	    if (_layerEnabled$1) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        service.loadIssues(projection);
-	        updateMarkers();
-	      } else {
-	        editOff();
+	          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.
 
-	  // Toggles the layer on and off
-	  drawImproveOSM.enabled = function(val) {
-	    if (!arguments.length) { return _layerEnabled$1; }
 
-	    _layerEnabled$1 = val;
-	    if (_layerEnabled$1) {
-	      layerOn();
-	    } else {
-	      layerOff();
-	      if (context.selectedErrorID()) {
-	        context.enter(modeBrowse(context));
-	      }
-	    }
+	          if (id in base.graph.entities) {
+	            baseEntities[id] = base.graph.entities[id];
+	          }
 
-	    dispatch.call('change');
-	    return this;
-	  };
+	          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
 
-	  drawImproveOSM.supported = function () { return !!getService(); };
 
-	  return drawImproveOSM;
-	}
+	          var baseParents = base.graph._parentWays[id];
 
-	var _layerEnabled$2 = false;
-	var _qaService$2;
+	          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;
+	      });
 
-	function svgOsmose(projection, context, dispatch) {
-	  var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-	  var minZoom = 12;
+	      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;
 
-	  var touchLayer = select(null);
-	  var drawLayer = select(null);
-	  var layerVisible = false;
+	      if (h.version === 2 || h.version === 3) {
+	        var allEntities = {};
+	        h.entities.forEach(function (entity) {
+	          allEntities[osmEntity.key(entity)] = osmEntity(entity);
+	        });
 
-	  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');
-	  }
+	        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);
+	          });
 
-	  // 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;
-	    }
+	          var stack = _stack.map(function (state) {
+	            return state.graph;
+	          });
 
-	    return _qaService$2;
-	  }
+	          _stack[0].graph.rebase(baseEntities, stack, true);
 
-	  // Show the markers
-	  function editOn() {
-	    if (!layerVisible) {
-	      layerVisible = true;
-	      drawLayer
-	        .style('display', 'block');
-	    }
-	  }
+	          _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
 
-	  // 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();
-	    }
-	  }
 
-	  // Enable the layer.  This shows the markers and transitions them to visible.
-	  function layerOn() {
-	    editOn();
+	          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);
+	            });
 
-	    drawLayer
-	      .style('opacity', 0)
-	      .transition()
-	      .duration(250)
-	      .style('opacity', 1)
-	      .on('end interrupt', function () { return dispatch.call('change'); });
-	  }
+	            if (missing.length && osm) {
+	              loadComplete = false;
+	              context.map().redrawEnable(false);
+	              var loading = uiLoading(context).blocking(true);
+	              context.container().call(loading);
 
-	  // 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');
-	      });
-	  }
+	              var childNodesLoaded = function childNodesLoaded(err, result) {
+	                if (!err) {
+	                  var visibleGroups = utilArrayGroupBy(result.data, 'visible');
+	                  var visibles = visibleGroups["true"] || []; // alive nodes
 
-	  // Update the issue markers
-	  function updateMarkers() {
-	    if (!layerVisible || !_layerEnabled$2) { return; }
+	                  var invisibles = visibleGroups["false"] || []; // deleted nodes
 
-	    var service = getService();
-	    var selectedID = context.selectedErrorID();
-	    var data = (service ? service.getItems(projection) : []);
-	    var getTransform = svgPointTransform(projection);
+	                  if (visibles.length) {
+	                    var visibleIDs = visibles.map(function (entity) {
+	                      return entity.id;
+	                    });
 
-	    // Draw markers..
-	    var markers = drawLayer.selectAll('.qaItem.osmose')
-	      .data(data, function (d) { return d.id; });
+	                    var stack = _stack.map(function (state) {
+	                      return state.graph;
+	                    });
 
-	    // exit
-	    markers.exit()
-	      .remove();
+	                    missing = utilArrayDifference(missing, visibleIDs);
 
-	    // 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' : ''));
-	          }
-	        });
+	                    _stack[0].graph.rebase(visibles, stack, true);
 
-	    // 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';
+	                    _tree.rebase(visibles, true);
+	                  } // fetch older versions of nodes that were deleted..
 
-	    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 sortY(a, b) {
-	      return (a.id === selectedID) ? 1
-	        : (b.id === selectedID) ? -1
-	        : b.loc[1] - a.loc[1];
-	    }
-	  }
+	                  invisibles.forEach(function (entity) {
+	                    osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
+	                  });
+	                }
 
-	  // Draw the Osmose layer and schedule loading issues and updating markers.
-	  function drawOsmose(selection) {
-	    var service = getService();
+	                if (err || !missing.length) {
+	                  loading.close();
+	                  context.map().redrawEnable(true);
+	                  dispatch$1.call('change');
+	                  dispatch$1.call('restore', this);
+	                }
+	              };
 
-	    var surface = context.surface();
-	    if (surface && !surface.empty()) {
-	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-	    }
+	              osm.loadMultiple(missing, childNodesLoaded);
+	            }
+	          }
+	        }
 
-	    drawLayer = selection.selectAll('.layer-osmose')
-	      .data(service ? [0] : []);
+	        _stack = h.stack.map(function (d) {
+	          var entities = {},
+	              entity;
 
-	    drawLayer.exit()
-	      .remove();
+	          if (d.modified) {
+	            d.modified.forEach(function (key) {
+	              entity = allEntities[key];
+	              entities[entity.id] = entity;
+	            });
+	          }
 
-	    drawLayer = drawLayer.enter()
-	      .append('g')
-	        .attr('class', 'layer-osmose')
-	        .style('display', _layerEnabled$2 ? 'block' : 'none')
-	      .merge(drawLayer);
+	          if (d.deleted) {
+	            d.deleted.forEach(function (id) {
+	              entities[id] = undefined;
+	            });
+	          }
 
-	    if (_layerEnabled$2) {
-	      if (service && ~~context.map().zoom() >= minZoom) {
-	        editOn();
-	        service.loadIssues(projection);
-	        updateMarkers();
+	          return {
+	            graph: coreGraph(_stack[0].graph).load(entities),
+	            annotation: d.annotation,
+	            imageryUsed: d.imageryUsed,
+	            photoOverlaysUsed: d.photoOverlaysUsed,
+	            transform: d.transform,
+	            selectedIDs: d.selectedIDs
+	          };
+	        });
 	      } else {
-	        editOff();
-	      }
-	    }
-	  }
+	        // original version
+	        _stack = h.stack.map(function (d) {
+	          var entities = {};
 
-	  // Toggles the layer on and off
-	  drawOsmose.enabled = function(val) {
-	    if (!arguments.length) { return _layerEnabled$2; }
+	          for (var i in d.entities) {
+	            var entity = d.entities[i];
+	            entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
+	          }
 
-	    _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
+	          d.graph = coreGraph(_stack[0].graph).load(entities);
+	          return d;
 	        });
-	    } else {
-	      layerOff();
-	      if (context.selectedErrorID()) {
-	        context.enter(modeBrowse(context));
 	      }
-	    }
-
-	    dispatch.call('change');
-	    return this;
-	  };
-
-	  drawOsmose.supported = function () { return !!getService(); };
 
-	  return drawOsmose;
-	}
+	      var transform = _stack[_index].transform;
 
-	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;
+	      if (transform) {
+	        context.map().transformEase(transform, 0); // 0 = immediate, no easing
+	      }
 
-	    /**
-	     * init().
-	     */
-	    function init() {
-	        if (svgStreetside.initialized) { return; }  // run once
-	        svgStreetside.enabled = false;
-	        svgStreetside.initialized = true;
-	    }
+	      if (loadComplete) {
+	        dispatch$1.call('change');
+	        dispatch$1.call('restore', this);
+	      }
 
-	    /**
-	     * 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 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);
+	      }
 
-	        return _streetside;
-	    }
+	      return history;
+	    },
+	    // delete the history version saved in localStorage
+	    clearSaved: function clearSaved() {
+	      context.debouncedSave.cancel();
 
-	    /**
-	     * showLayer().
-	     */
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	      if (_lock.locked()) {
+	        _hasUnresolvedRestorableChanges = false;
+	        corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history
 
-	        editOn();
+	        corePreferences('comment', null);
+	        corePreferences('hashtags', null);
+	        corePreferences('source', null);
+	      }
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
-	    }
+	      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');
+	}
 
-	    /**
-	     * hideLayer().
-	     */
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	/**
+	 * Look for roads that can be connected to other roads with a short extension
+	 */
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', editOff);
-	    }
+	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
 
-	    /**
-	     * editOn().
-	     */
-	    function editOn() {
-	        layer.style('display', 'block');
-	    }
+	  var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
 
-	    /**
-	     * editOff().
-	     */
-	    function editOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
-	    }
+	  var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
 
-	    /**
-	     * click() Handles 'bubble' point click event.
-	     */
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	  function isHighway(entity) {
+	    return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
+	  }
 
-	        // try to preserve the viewer rotation when staying on the same sequence
-	        if (d.sequenceKey !== _selectedSequence) {
-	            _viewerYaw = 0;  // reset
-	        }
-	        _selectedSequence = d.sequenceKey;
+	  function isTaggedAsNotContinuing(node) {
+	    return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
+	  }
 
-	        service
-	            .selectImage(context, d)
-	            .then(function (response) {
-	                if (response.status === 'ok'){
-	                    service.showViewer(context, _viewerYaw);
-	                }
-	            });
+	  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]);
 
+	          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;
 
-	        context.map().centerEase(d.loc);
-	    }
+	    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');
 
-	    /**
-	     * mouseover().
-	     */
-	    function mouseover(d) {
-	        var service = getService();
-	        if (service) { service.setStyles(context, d); }
-	    }
+	          var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
+	              endNodeId = _this$issue$entityIds[1],
+	              crossWayId = _this$issue$entityIds[2];
 
-	    /**
-	     * mouseout().
-	     */
-	    function mouseout() {
-	        var service = getService();
-	        if (service) { service.setStyles(context, null); }
-	    }
+	          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)
 
-	    /**
-	     * transform().
-	     */
-	    function transform(d) {
-	        var t = svgPointTransform(projection)(d);
-	        var rot = d.ca + _viewerYaw;
-	        if (rot) {
-	            t += ' rotate(' + Math.floor(rot) + ',0,0)';
-	        }
-	        return t;
-	    }
+	          var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
 
+	          if (nearEndNodes.length > 0) {
+	            var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
 
-	    function viewerChanged() {
-	        var service = getService();
-	        if (!service) { return; }
+	            if (collinear) {
+	              context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
+	              return;
+	            }
+	          }
 
-	        var viewer = service.viewer();
-	        if (!viewer) { 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
 
-	        // update viewfield rotation
-	        _viewerYaw = viewer.getYaw();
+	          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]);
 
-	        // avoid updating if the map is currently transformed
-	        // e.g. during drags or easing.
-	        if (context.map().isTransformed()) { return; }
+	      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'));
+	          }
+	        }));
+	      }
 
-	        layer.selectAll('.viewfield-group.currentView')
-	            .attr('transform', transform);
+	      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'));
+	    }
 
-	    context.photos().on('change.streetside', update);
+	    function isExtendableCandidate(node, way) {
+	      // can not accurately test vertices on tiles not downloaded from osm - #5938
+	      var osm = services.osm;
 
-	    /**
-	     * 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();
+	      if (osm && !osm.isDataLoaded(node.loc)) {
+	        return false;
+	      }
 
-	        var sequences = [];
-	        var bubbles = [];
+	      if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
+	        return false;
+	      }
 
-	        if (context.photos().showsPanoramic()) {
-	            sequences = (service ? service.sequences(projection) : []);
-	            bubbles = (service && showMarkers ? service.bubbles(projection) : []);
-	        }
+	      var occurrences = 0;
 
-	        var traces = layer.selectAll('.sequences').selectAll('.sequence')
-	            .data(sequences, function(d) { return d.properties.key; });
+	      for (var index in way.nodes) {
+	        if (way.nodes[index] === node.id) {
+	          occurrences += 1;
 
-	        // exit
-	        traces.exit()
-	            .remove();
+	          if (occurrences > 1) {
+	            return false;
+	          }
+	        }
+	      }
 
-	        // enter/update
-	        traces = traces.enter()
-	            .append('path')
-	            .attr('class', 'sequence')
-	            .merge(traces)
-	            .attr('d', svgPath(projection).geojson);
+	      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
 
-	        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');
-	            });
+	        testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection
 
-	        // 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';
-	            }
-	        }
+	        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;
+	      });
 	    }
 
-	    /**
-	     * 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 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
 
-	        layer = selection.selectAll('.layer-streetside-images')
-	            .data(service ? [0] : []);
+	      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);
 
-	        layer.exit()
-	            .remove();
+	        if (diff < minAngle) {
+	          joinTo = endNode;
+	          minAngle = diff;
+	        }
+	      });
+	      /* Threshold set by considering right angle triangle
+	      based on node joining threshold and extension distance */
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-streetside-images')
-	            .style('display', enabled ? 'block' : 'none');
+	      if (minAngle <= SIG_ANGLE_TH) return joinTo;
+	      return null;
+	    }
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'sequences');
+	    function hasTag(tags, key) {
+	      return tags[key] !== undefined && tags[key] !== 'no';
+	    }
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'markers');
+	    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
 
-	        layer = layerEnter
-	            .merge(layer);
+	      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
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadBubbles(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	      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
 
-	    /**
-	     * 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 midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge
 
-	    /**
-	     * drawImages.supported().
-	     */
-	    drawImages.supported = function() {
-	        return !!getService();
-	    };
+	      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
 
-	    init();
+	      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
 
-	    return drawImages;
-	}
+	      var segmentInfos = tree.waySegments(queryExtent, graph);
 
-	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;
+	      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]);
+
+	        if (crossLoc) {
+	          return {
+	            mid: midNode,
+	            node: tipNode,
+	            wid: way2.id,
+	            edge: [nA.id, nB.id],
+	            cross_loc: crossLoc
+	          };
 	        }
+	      }
 
-	        return _mapillary;
+	      return null;
 	    }
+	  };
 
+	  validation.type = type;
+	  return validation;
+	}
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
-
-	        editOn();
+	function validationCloseNodes(context) {
+	  var type = 'close_nodes';
+	  var pointThresholdMeters = 0.2;
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
+	  var validation = function validation(entity, graph) {
+	    if (entity.type === 'node') {
+	      return getIssuesForNode(entity);
+	    } else if (entity.type === 'way') {
+	      return getIssuesForWay(entity);
 	    }
 
+	    return [];
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
+	    function getIssuesForNode(node) {
+	      var parentWays = graph.parentWays(node);
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', editOff);
+	      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);
 
-	    function editOn() {
-	        layer.style('display', 'block');
-	    }
+	      for (var i in parentRelations) {
+	        var relation = parentRelations[i];
+	        if (relation.tags.type === 'boundary') return 'boundary';
 
+	        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';
+	        }
+	      }
 
-	    function editOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
+	      return 'other';
 	    }
 
+	    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
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
-
-	        service
-	            .selectImage(context, d.key)
-	            .updateViewer(context, d.key)
-	            .showViewer(context);
-
-	        context.map().centerEase(d.loc);
+	      if (hypotenuseMeters < 1.5) return false;
+	      return true;
 	    }
 
+	    function getIssuesForWay(way) {
+	      if (!shouldCheckWay(way)) return [];
+	      var issues = [],
+	          nodes = graph.childNodes(way);
 
-	    function mouseover(d) {
-	        var service = getService();
-	        if (service) { service.setStyles(context, d); }
-	    }
-
+	      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);
+	      }
 
-	    function mouseout() {
-	        var service = getService();
-	        if (service) { service.setStyles(context, null); }
+	      return issues;
 	    }
 
+	    function getIssuesForVertex(node, parentWays) {
+	      var issues = [];
 
-	    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;
-	    }
-
-	    context.photos().on('change.mapillary_images', update);
+	      function checkForCloseness(node1, node2, way) {
+	        var issue = getWayIssueIfAny(node1, node2, way);
+	        if (issue) issues.push(issue);
+	      }
 
-	    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;
-	    }
+	      for (var i = 0; i < parentWays.length; i++) {
+	        var parentWay = parentWays[i];
+	        if (!shouldCheckWay(parentWay)) continue;
+	        var lastIndex = parentWay.nodes.length - 1;
 
-	    function update() {
+	        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 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 (j !== lastIndex) {
+	            if (parentWay.nodes[j + 1] === node.id) {
+	              checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
 	            }
+	          }
 	        }
-	    }
+	      }
 
+	      return issues;
+	    }
 
-	    function drawImages(selection) {
-	        var enabled = svgMapillaryImages.enabled;
-	        var service = getService();
+	    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
 
-	        layer = selection.selectAll('.layer-mapillary')
-	            .data(service ? [0] : []);
+	      if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail
 
-	        layer.exit()
-	            .remove();
+	      if (wayType === 'indoor') return 0.01;
+	      if (wayType === 'building') return 0.05;
+	      if (wayType === 'path') return 0.1;
+	      return 0.2;
+	    }
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapillary')
-	            .style('display', enabled ? 'block' : 'none');
+	    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);
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'sequences');
+	      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;
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'markers');
+	        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;
 
-	        layer = layerEnter
-	            .merge(layer);
+	          for (var key in zAxisKeys) {
+	            var nodeValue = node.tags[key] || '0';
+	            var nearbyValue = nearby.tags[key] || '0';
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadImages(projection);
-	            } else {
-	                editOff();
+	            if (nodeValue !== nearbyValue) {
+	              zAxisDifferentiates = true;
+	              break;
 	            }
-	        }
-	    }
-
+	          }
 
-	    drawImages.enabled = function(_) {
-	        if (!arguments.length) { return svgMapillaryImages.enabled; }
-	        svgMapillaryImages.enabled = _;
-	        if (svgMapillaryImages.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
+	          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.call('change');
-	        return this;
-	    };
-
+	      }
 
-	    drawImages.supported = function() {
-	        return !!getService();
-	    };
+	      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);
+	      }
+	    }
 
-	    init();
-	    return drawImages;
-	}
+	    function getWayIssueIfAny(node1, node2, way) {
+	      if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
+	        return null;
+	      }
 
-	function svgMapillarySigns(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var layer = select(null);
-	    var _mapillary;
+	      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;
+	      }
 
+	      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 init() {
-	        if (svgMapillarySigns.initialized) { return; }  // run once
-	        svgMapillarySigns.enabled = false;
-	        svgMapillarySigns.initialized = true;
+	      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);
+	      }
 	    }
+	  };
 
+	  validation.type = type;
+	  return validation;
+	}
 
-	    function getService() {
-	        if (services.mapillary && !_mapillary) {
-	            _mapillary = services.mapillary;
-	            _mapillary.event.on('loadedSigns', throttledRedraw);
-	        } else if (!services.mapillary && _mapillary) {
-	            _mapillary = null;
-	        }
-	        return _mapillary;
-	    }
+	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);
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	      for (var i = 0; i < parentRels.length; i++) {
+	        var rel = parentRels[i];
 
-	        editOn();
+	        if (getFeatureType(rel, graph) !== null) {
+	          return rel;
+	        }
+	      }
 	    }
 
+	    return way;
+	  }
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
-	        editOff();
-	    }
+	  function hasTag(tags, key) {
+	    return tags[key] !== undefined && tags[key] !== 'no';
+	  }
 
+	  function taggedAsIndoor(tags) {
+	    return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
+	  }
 
-	    function editOn() {
-	        layer.style('display', 'block');
-	    }
+	  function allowsBridge(featureType) {
+	    return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+	  }
 
+	  function allowsTunnel(featureType) {
+	    return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+	  } // discard
 
-	    function editOff() {
-	        layer.selectAll('.icon-sign').remove();
-	        layer.style('display', 'none');
-	    }
 
+	  var ignoredBuildings = {
+	    demolished: true,
+	    dismantled: true,
+	    proposed: true,
+	    razed: true
+	  };
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
+	  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
 
-	        context.map().centerEase(d.loc);
+	    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;
+	  }
 
-	        var selectedImageKey = service.getSelectedImageKey();
-	        var imageKey;
+	  function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
+	    // assume 0 by default
+	    var level1 = tags1.level || '0';
+	    var level2 = tags2.level || '0';
 
-	        // 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;
-	            }
-	        });
+	    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
 
-	        service
-	            .selectImage(context, imageKey)
-	            .updateViewer(context, imageKey)
-	            .showViewer(context);
-	    }
 
+	    var layer1 = tags1.layer || '0';
+	    var layer2 = tags2.layer || '0';
 
-	    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;
-	            });
-	    }
+	    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;
 
-	    function drawSigns(selection) {
-	        var enabled = svgMapillarySigns.enabled;
-	        var service = getService();
+	    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
 
-	        layer = selection.selectAll('.layer-mapillary-signs')
-	            .data(service ? [0] : []);
+	      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
 
-	        layer.exit()
-	            .remove();
 
-	        layer = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapillary-signs layer-mapillary-detections')
-	            .style('display', enabled ? 'block' : 'none')
-	            .merge(layer);
+	    if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
+	    if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadSigns(projection);
-	            } else {
-	                editOff();
-	            }
-	        }
+	    if (featureType1 === 'building' || featureType2 === 'building') {
+	      // for building crossings, different layers are enough
+	      if (layer1 !== layer2) return true;
 	    }
 
+	    return false;
+	  } // highway values for which we shouldn't recommend connecting to waterways
 
-	    drawSigns.enabled = function(_) {
-	        if (!arguments.length) { return svgMapillarySigns.enabled; }
-	        svgMapillarySigns.enabled = _;
-	        if (svgMapillarySigns.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
 
+	  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
+	  };
 
-	    drawSigns.supported = function() {
-	        return !!getService();
-	    };
+	  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];
 
-	    init();
-	    return drawSigns;
-	}
+	        if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
+	          // one feature is a path but not both
+	          var roadFeature = entity1IsPath ? entity2 : entity1;
 
-	function svgMapillaryMapFeatures(projection, context, dispatch) {
-	    var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-	    var minZoom = 12;
-	    var layer = select(null);
-	    var _mapillary;
+	          if (nonCrossingHighways[roadFeature.tags.highway]) {
+	            // don't mark path connections with certain roads as crossings
+	            return {};
+	          }
 
+	          var pathFeature = entity1IsPath ? entity1 : entity2;
 
-	    function init() {
-	        if (svgMapillaryMapFeatures.initialized) { return; }  // run once
-	        svgMapillaryMapFeatures.enabled = false;
-	        svgMapillaryMapFeatures.initialized = true;
-	    }
+	          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
 
 
-	    function getService() {
-	        if (services.mapillary && !_mapillary) {
-	            _mapillary = services.mapillary;
-	            _mapillary.event.on('loadedMapFeatures', throttledRedraw);
-	        } else if (!services.mapillary && _mapillary) {
-	            _mapillary = null;
+	          return bothLines ? {
+	            highway: 'crossing'
+	          } : {};
 	        }
-	        return _mapillary;
-	    }
 
+	        return {};
+	      }
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	      if (featureType1 === 'waterway') return {};
+	      if (featureType1 === 'railway') return {};
+	    } else {
+	      var featureTypes = [featureType1, featureType2];
 
-	        editOn();
-	    }
+	      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
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
-	        editOff();
-	    }
+	            return {
+	              railway: 'crossing'
+	            };
+	          } else {
+	            // path-tram connections use this tag
+	            if (isTram) return {
+	              railway: 'tram_level_crossing'
+	            }; // other road-rail connections use this tag
 
+	            return {
+	              railway: 'level_crossing'
+	            };
+	          }
+	        }
 
-	    function editOn() {
-	        layer.style('display', 'block');
-	    }
+	        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;
 
+	          if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
+	            // do not allow fords on major highways
+	            return null;
+	          }
 
-	    function editOff() {
-	        layer.selectAll('.icon-map-feature').remove();
-	        layer.style('display', 'none');
+	          return bothLines ? {
+	            ford: 'yes'
+	          } : {};
+	        }
+	      }
 	    }
 
+	    return null;
+	  }
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
-
-	        context.map().centerEase(d.loc);
-
-	        var selectedImageKey = service.getSelectedImageKey();
-	        var imageKey;
+	  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
 
-	        // 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;
-	            }
-	        });
+	    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 = {};
 
-	        service
-	            .selectImage(context, imageKey)
-	            .updateViewer(context, imageKey)
-	            .showViewer(context);
-	    }
+	    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);
 
-	    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);
-	            });
+	      for (j = 0; j < segmentInfos.length; j++) {
+	        segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation
 
-	        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;
-	            });
+	        if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed
 
-	        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;
-	            });
-	    }
+	        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;
+	        taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway
 
-	    function drawMapFeatures(selection) {
-	        var enabled = svgMapillaryMapFeatures.enabled;
-	        var service = getService();
+	        way2FeatureType = getFeatureType(taggedFeature2, graph);
 
-	        layer = selection.selectAll('.layer-mapillary-map-features')
-	            .data(service ? [0] : []);
+	        if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
+	          continue;
+	        } // create only one issue for building crossings
 
-	        layer.exit()
-	            .remove();
 
-	        layer = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-mapillary-map-features layer-mapillary-detections')
-	            .style('display', enabled ? 'block' : 'none')
-	            .merge(layer);
+	        oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+	        nAId = segment2Info.nodes[0];
+	        nBId = segment2Info.nodes[1];
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadMapFeatures(projection);
-	            } else {
-	                editOff();
-	            }
+	        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
+	          });
 
-	    drawMapFeatures.enabled = function(_) {
-	        if (!arguments.length) { return svgMapillaryMapFeatures.enabled; }
-	        svgMapillaryMapFeatures.enabled = _;
-	        if (svgMapillaryMapFeatures.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
+	          if (oneOnly) {
+	            checkedSingleCrossingWays[way2.id] = true;
+	            break;
+	          }
 	        }
-	        dispatch.call('change');
-	        return this;
-	    };
-
-
-	    drawMapFeatures.supported = function() {
-	        return !!getService();
-	    };
-
-
-	    init();
-	    return drawMapFeatures;
-	}
-
-	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;
-
-
-	    function init() {
-	        if (svgOpenstreetcamImages.initialized) { return; }  // run once
-	        svgOpenstreetcamImages.enabled = false;
-	        svgOpenstreetcamImages.initialized = true;
+	      }
 	    }
 
+	    return edgeCrossInfos;
+	  }
 
-	    function getService() {
-	        if (services.openstreetcam && !_openstreetcam) {
-	            _openstreetcam = services.openstreetcam;
-	            _openstreetcam.event.on('loadedImages', throttledRedraw);
-	        } else if (!services.openstreetcam && _openstreetcam) {
-	            _openstreetcam = null;
-	        }
-
-	        return _openstreetcam;
-	    }
-
+	  function waysToCheck(entity, graph) {
+	    var featureType = getFeatureType(entity, graph);
+	    if (!featureType) return [];
 
-	    function showLayer() {
-	        var service = getService();
-	        if (!service) { return; }
+	    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
 
-	        editOn();
+	          if (entity && array.indexOf(entity) === -1) {
+	            array.push(entity);
+	          }
+	        }
 
-	        layer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end', function () { dispatch.call('change'); });
+	        return array;
+	      }, []);
 	    }
 
+	    return [];
+	  }
 
-	    function hideLayer() {
-	        throttledRedraw.cancel();
-
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end', editOff);
-	    }
-
+	  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
 
-	    function editOn() {
-	        layer.style('display', 'block');
-	    }
+	    var wayIndex, crossingIndex, crossings;
 
+	    for (wayIndex in ways) {
+	      crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
 
-	    function editOff() {
-	        layer.selectAll('.viewfield-group').remove();
-	        layer.style('display', 'none');
+	      for (crossingIndex in crossings) {
+	        issues.push(createIssue(crossings[crossingIndex], graph));
+	      }
 	    }
 
+	    return issues;
+	  };
 
-	    function click(d) {
-	        var service = getService();
-	        if (!service) { return; }
-
-	        service
-	            .selectImage(context, d)
-	            .updateViewer(context, d)
-	            .showViewer(context);
+	  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;
 
-	        context.map().centerEase(d.loc);
-	    }
+	      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];
+	    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 mouseover(d) {
-	        var service = getService();
-	        if (service) { service.setStyles(context, d); }
+	    if (isCrossingIndoors) {
+	      crossingTypeID = 'indoor-indoor';
+	    } else if (isCrossingTunnels) {
+	      crossingTypeID = 'tunnel-tunnel';
+	    } else if (isCrossingBridges) {
+	      crossingTypeID = 'bridge-bridge';
 	    }
 
-
-	    function mouseout() {
-	        var service = getService();
-	        if (service) { service.setStyles(context, null); }
+	    if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
+	      crossingTypeID += '_connectable';
 	    }
 
+	    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();
+	        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 transform(d) {
-	        var t = svgPointTransform(projection)(d);
-	        if (d.ca) {
-	            t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+	        if (connectionTags) {
+	          fixes.push(makeConnectWaysFix(this.data.connectionTags));
 	        }
-	        return t;
-	    }
-
 
-	    context.photos().on('change.openstreetcam_images', update);
+	        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
 
-	    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 skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
 
-	        var service = getService();
-	        var sequences = [];
-	        var images = [];
+	          if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
+	            fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
+	          }
+	        } // repositioning the features is always an option
 
-	        if (context.photos().showsFlat()) {
-	            sequences = (service ? service.sequences(projection) : []);
-	            images = (service && showMarkers ? service.images(projection) : []);
-	        }
 
-	        var traces = layer.selectAll('.sequences').selectAll('.sequence')
-	            .data(sequences, function(d) { return d.properties.key; });
+	        fixes.push(new validationIssueFix({
+	          icon: 'iD-operation-move',
+	          title: _t.html('issues.fix.reposition_features.title')
+	        }));
+	        return fixes;
+	      }
+	    });
 
-	        // exit
-	        traces.exit()
-	            .remove();
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.crossing_ways.' + crossingTypeID + '.reference'));
+	    }
+	  }
 
-	        // enter/update
-	        traces = traces.enter()
-	            .append('path')
-	            .attr('class', 'sequence')
-	            .merge(traces)
-	            .attr('d', svgPath(projection).geojson);
+	  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 groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-	            .data(images, function(d) { return d.key; });
+	        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
 
-	        // exit
-	        groups.exit()
-	            .remove();
+	          var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
 
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', 'viewfield-group')
-	            .on('mouseenter', mouseover)
-	            .on('mouseleave', mouseout)
-	            .on('click', click);
+	          if (!structLengthMeters) {
+	            // if no explicit width is set, approximate the width based on the tags
+	            structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
+	          }
 
-	        groupsEnter
-	            .append('g')
-	            .attr('class', 'viewfield-scale');
+	          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;
+	          }
 
-	        // 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');
+	          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; // add padding since the structure must extend past the edges of the crossed feature
 
-	        markers.selectAll('circle')
-	            .data([0])
-	            .enter()
-	            .append('circle')
-	            .attr('dx', '0')
-	            .attr('dy', '0')
-	            .attr('r', '6');
+	          structLengthMeters += 4; // clamp the length to a reasonable range
 
-	        var viewfields = markers.selectAll('.viewfield')
-	            .data(showViewfields ? [0] : []);
+	          structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
 
-	        viewfields.exit()
-	            .remove();
+	          function geomToProj(geoPoint) {
+	            return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
+	          }
 
-	        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 projToGeom(projPoint) {
+	            var lat = geoMetersToLat(projPoint[1]);
+	            return [geoMetersToLon(projPoint[0], lat), lat];
+	          }
 
+	          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);
 
-	    function drawImages(selection) {
-	        var enabled = svgOpenstreetcamImages.enabled,
-	            service = getService();
+	          function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
+	            var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
+	            return projToGeom([projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters, projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters]);
+	          }
 
-	        layer = selection.selectAll('.layer-openstreetcam')
-	            .data(service ? [0] : []);
+	          var endpointLocGetter1 = function endpointLocGetter1(lengthMeters) {
+	            return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
+	          };
 
-	        layer.exit()
-	            .remove();
+	          var endpointLocGetter2 = function endpointLocGetter2(lengthMeters) {
+	            return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
+	          }; // avoid creating very short edges from splitting too close to another node
 
-	        var layerEnter = layer.enter()
-	            .append('g')
-	            .attr('class', 'layer-openstreetcam')
-	            .style('display', enabled ? 'block' : 'none');
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'sequences');
+	          var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary
 
-	        layerEnter
-	            .append('g')
-	            .attr('class', 'markers');
+	          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
 
-	        layer = layerEnter
-	            .merge(layer);
+	            var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
 
-	        if (enabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                update();
-	                service.loadImages(projection);
+	            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 {
-	                editOff();
-	            }
-	        }
-	    }
-
+	              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;
+	                    }
+	                  }
+	                });
+	              });
 
-	    drawImages.enabled = function(_) {
-	        if (!arguments.length) { return svgOpenstreetcamImages.enabled; }
-	        svgOpenstreetcamImages.enabled = _;
-	        if (svgOpenstreetcamImages.enabled) {
-	            showLayer();
-	        } else {
-	            hideLayer();
-	        }
-	        dispatch.call('change');
-	        return this;
-	    };
+	              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
 
 
-	    drawImages.supported = function() {
-	        return !!getService();
-	    };
+	            if (!newNode) newNode = endNode;
+	            var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
+	            // do the split
 
+	            graph = splitAction(graph);
 
-	    init();
-	    return drawImages;
-	}
+	            if (splitAction.getCreatedWayIDs().length) {
+	              resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
+	            }
 
-	function svgOsm(projection, context, dispatch) {
-	    var enabled = true;
+	            return newNode;
+	          }
 
+	          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 drawOsm(selection) {
-	        selection.selectAll('.layer-osm')
-	            .data(['covered', 'areas', 'lines', 'points', 'labels'])
-	            .enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'layer-osm ' + d; });
+	          if (bridgeOrTunnel === 'bridge') {
+	            tags.bridge = 'yes';
+	            tags.layer = '1';
+	          } else {
+	            var tunnelValue = 'yes';
 
-	        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 (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 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');
-	            });
-	    }
+	          graph = actionChangeTags(structureWay.id, tags)(graph);
+	          return graph;
+	        };
 
+	        context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
+	        context.enter(modeSelect(context, resultWayIDs));
+	      }
+	    });
+	  }
 
-	    function hideLayer() {
-	        var layer = context.surface().selectAll('.data-layer.osm');
-	        layer.interrupt();
+	  function makeConnectWaysFix(connectionTags) {
+	    var fixTitleID = 'connect_features';
 
-	        layer
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 0)
-	            .on('end interrupt', function () {
-	                layer.classed('disabled', true);
-	                dispatch.call('change');
-	            });
+	    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);
+	            }
+	          });
+
+	          if (nodesToMerge.length > 1) {
+	            // if we're using nearby nodes, merge them with the new node
+	            graph = actionMergeNodes(nodesToMerge, loc)(graph);
+	          }
 
-	    drawOsm.enabled = function(val) {
-	        if (!arguments.length) { return enabled; }
-	        enabled = val;
+	          return graph;
+	        }, _t('issues.fix.connect_crossing_features.annotation'));
+	      }
+	    });
+	  }
 
-	        if (enabled) {
-	            showLayer();
+	  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 {
-	            hideLayer();
+	          if (higherOrLower === 'higher') {
+	            layer = 1;
+	          } else {
+	            layer = -1;
+	          }
 	        }
 
-	        dispatch.call('change');
-	        return this;
-	    };
-
+	        tags.layer = layer.toString();
+	        context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
+	      }
+	    });
+	  }
 
-	    return drawOsm;
+	  validation.type = type;
+	  return validation;
 	}
 
-	var _notesEnabled = false;
-	var _osmService;
-
-
-	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;
-
-
-	    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');
-	    }
-
+	function validationDisconnectedWay() {
+	  var type = 'disconnected_way';
 
-	    // 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 isTaggedAsHighway(entity) {
+	    return osmRoutableHighwayTagValues[entity.tags.highway];
+	  }
 
-	        return _osmService;
-	    }
+	  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
+	    })];
 
+	    function makeFixes(context) {
+	      var fixes = [];
+	      var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
 
-	    // Show the notes
-	    function editOn() {
-	        if (!_notesVisible) {
-	            _notesVisible = true;
-	            drawLayer
-	                .style('display', 'block');
+	      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);
 	        }
-	    }
 
-
-	    // 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 (!fixes.length) {
+	          fixes.push(new validationIssueFix({
+	            title: _t.html('issues.fix.connect_feature.title')
+	          }));
 	        }
-	    }
 
+	        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]);
 
-	    // Enable the layer.  This shows the notes and transitions them to visible.
-	    function layerOn() {
-	        editOn();
+	            if (!operation.disabled()) {
+	              operation();
+	            }
+	          }
+	        }));
+	      } else {
+	        fixes.push(new validationIssueFix({
+	          title: _t.html('issues.fix.connect_features.title')
+	        }));
+	      }
 
-	        drawLayer
-	            .style('opacity', 0)
-	            .transition()
-	            .duration(250)
-	            .style('opacity', 1)
-	            .on('end interrupt', function () {
-	                dispatch$1.call('change');
-	            });
+	      return fixes;
 	    }
 
-
-	    // Disable the layer.  This transitions the layer invisible and then hides the notes.
-	    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');
-	            });
+	    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
 
-	    // 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);
+	      var waysToCheck = []; // the queue of remaining routable ways to traverse
 
+	      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);
+	          }
+	        });
+	      }
 
-	        // Draw targets..
-	        if (touchLayer.empty()) { return; }
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	      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;
+	      }
 
-	        var targets = touchLayer.selectAll('.note')
-	            .data(data, function(d) { return d.id; });
+	      while (waysToCheck.length) {
+	        var wayToCheck = waysToCheck.pop();
+	        var childNodes = graph.childNodes(wayToCheck);
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	        for (var i in childNodes) {
+	          var vertex = childNodes[i];
 
-	        // 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);
+	          if (isConnectedVertex(vertex)) {
+	            // found a link to the wider network, not a routing island
+	            return null;
+	          }
 
+	          if (isRoutableNode(vertex)) {
+	            routingIsland.add(vertex);
+	          }
 
-	        function sortY(a, b) {
-	            return (a.id === selectedID) ? 1 : (b.id === selectedID) ? -1 : b.loc[1] - a.loc[1];
+	          queueParentWays(vertex);
 	        }
-	    }
+	      } // no network link found, this is a routing island, return its members
 
 
-	    // Draw the notes layer and schedule loading notes and updating markers.
-	    function drawNotes(selection) {
-	        var service = getService();
-
-	        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] : []);
+	      return routingIsland;
+	    }
 
-	        drawLayer.exit()
-	            .remove();
+	    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
 
-	        drawLayer = drawLayer.enter()
-	            .append('g')
-	            .attr('class', 'layer-notes')
-	            .style('display', _notesEnabled ? 'block' : 'none')
-	            .merge(drawLayer);
+	      if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
+	      if (vertex.tags.amenity === 'parking_entrance') return true;
+	      return false;
+	    }
 
-	        if (_notesEnabled) {
-	            if (service && ~~context.map().zoom() >= minZoom) {
-	                editOn();
-	                service.loadNotes(projection);
-	                updateMarkers();
-	            } else {
-	                editOff();
-	            }
-	        }
+	    function isRoutableNode(node) {
+	      // treat elevators as distinct features in the highway network
+	      if (node.tags.highway === 'elevator') return true;
+	      return false;
 	    }
 
+	    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;
+	      });
+	    }
 
-	    // Toggles the layer on and off
-	    drawNotes.enabled = function(val) {
-	        if (!arguments.length) { return _notesEnabled; }
+	    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
 
-	        _notesEnabled = val;
-	        if (_notesEnabled) {
-	            layerOn();
-	        } else {
-	            layerOff();
-	            if (context.selectedNoteID()) {
-	                context.enter(modeBrowse(context));
-	            }
-	        }
+	          var map = context.map();
 
-	        dispatch$1.call('change');
-	        return this;
-	    };
+	          if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+	            map.zoomToEase(vertex);
+	          }
 
+	          context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
+	        }
+	      });
+	    }
+	  };
 
-	    return drawNotes;
+	  validation.type = type;
+	  return validation;
 	}
 
-	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; });
-	    }
+	function validationFormatting() {
+	  var type = 'invalid_format';
 
-	    return drawTouch;
-	}
+	  var validation = function validation(entity) {
+	    var issues = [];
 
-	function refresh(selection, node) {
-	    var cr = node.getBoundingClientRect();
-	    var prop = [cr.width, cr.height];
-	    selection.property('__dimensions__', prop);
-	    return prop;
-	}
+	    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 utilGetDimensions(selection, force) {
-	    if (!selection || selection.empty()) {
-	        return [0, 0];
+	      return !email || valid_email.test(email);
 	    }
-	    var node = selection.node(),
-	        cached = selection.property('__dimensions__');
-	    return (!cached || force) ? refresh(selection, node) : cached;
-	}
+	    /*
+	    function isSchemePresent(url) {
+	        var valid_scheme = /^https?:\/\//i;
+	        return (!url || valid_scheme.test(url));
+	    }
+	    */
 
 
-	function utilSetDimensions(selection, dimensions) {
-	    if (!selection || selection.empty()) {
-	        return selection;
+	    function showReferenceEmail(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.invalid_format.email.reference'));
 	    }
-	    var node = selection.node();
-	    if (dimensions === null) {
-	        refresh(selection, node);
-	        return selection;
+	    /*
+	    function showReferenceWebsite(selection) {
+	        selection.selectAll('.issue-reference')
+	            .data([0])
+	            .enter()
+	            .append('div')
+	            .attr('class', 'issue-reference')
+	            .html(t.html('issues.invalid_format.website.reference'));
 	    }
-	    return selection
-	        .property('__dimensions__', [dimensions[0], dimensions[1]])
-	        .attr('width', dimensions[0])
-	        .attr('height', dimensions[1]);
-	}
+	     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 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;
-	    };
 
+	    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);
+	      });
 
-	    drawLayers.layer = function(id) {
-	        var obj = _layers.find(function(o) { return o.id === id; });
-	        return obj && obj.layer;
-	    };
+	      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 issues;
+	  };
 
-	    drawLayers.only = function(what) {
-	        var arr = [].concat(what);
-	        var all = _layers.map(function(layer) { return layer.id; });
-	        return drawLayers.remove(utilArrayDifference(all, arr));
-	    };
+	  validation.type = type;
+	  return validation;
+	}
 
+	function validationHelpRequest(context) {
+	  var type = 'help_request';
 
-	    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 validation = function checkFixmeTag(entity) {
+	    if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user
 
+	    if (entity.version === undefined) return [];
 
-	    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 (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 [];
+	    }
 
-	    drawLayers.dimensions = function(val) {
-	        if (!arguments.length) { return utilGetDimensions(svg); }
-	        utilSetDimensions(svg, val);
-	        return this;
-	    };
+	    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 showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.fixme_tag.reference'));
+	    }
+	  };
 
-	    return utilRebind(drawLayers, dispatch$1, 'on');
+	  validation.type = type;
+	  return validation;
 	}
 
-	function svgLines(projection, context) {
-	    var detected = utilDetect();
+	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;
+	    }
 
-	    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 isOneway(way) {
+	      if (way.tags.oneway === 'yes') return true;
+	      if (way.tags.oneway) return false;
 
+	      for (var key in way.tags) {
+	        if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
+	          return true;
+	        }
+	      }
 
-	    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();
+	      return false;
+	    }
 
-	        // The targets and nopes will be MultiLineString sub-segments of the ways
-	        var data = { targets: [], nopes: [] };
+	    function nodeOccursMoreThanOnce(way, nodeID) {
+	      var occurrences = 0;
 
-	        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);
-	        });
+	      for (var index in way.nodes) {
+	        if (way.nodes[index] === nodeID) {
+	          occurrences += 1;
+	          if (occurrences > 1) return true;
+	        }
+	      }
 
+	      return false;
+	    }
 
-	        // 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; });
+	    function isConnectedViaOtherTypes(way, node) {
+	      var wayType = typeForWay(way);
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	      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;
+	        }
+	      }
 
-	        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);
-	            });
-	        };
+	      return graph.parentWays(node).some(function (parentWay) {
+	        if (parentWay.id === way.id) return false;
 
-	        // 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';
-	                        }
-	                    }
+	        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
 
-	                    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 (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
 
-	            return selection;
+	            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;
+	      });
+	    }
 
-	        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 issuesForNode(way, nodeID) {
+	      var isFirst = nodeID === way.first();
+	      var wayType = typeForWay(way); // ignore if this way is self-connected at this node
 
-	        function addMarkers(layergroup, pathclass, groupclass, groupdata, marker) {
-	            var markergroup = layergroup
-	                .selectAll('g.' + groupclass)
-	                .data([pathclass]);
+	      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 [];
+	      }
 
-	            markergroup = markergroup.enter()
-	                .append('g')
-	                .attr('class', groupclass)
-	                .merge(markergroup);
+	      var placement = isFirst ? 'start' : 'end',
+	          messageID = wayType + '.',
+	          referenceID = wayType + '.';
 
-	            var markers = markergroup
-	                .selectAll('path')
-	                .filter(filter)
-	                .data(
-	                    function data() { return groupdata[this.parentNode.__data__] || []; },
-	                    function key(d) { return [d.id, d.index]; }
-	                );
+	      if (wayType === 'waterway') {
+	        messageID += 'connected.' + placement;
+	        referenceID += 'connected';
+	      } else {
+	        messageID += placement;
+	        referenceID += placement;
+	      }
 
-	            markers.exit()
-	                .remove();
+	      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 = [];
 
-	            markers = markers.enter()
-	                .append('path')
-	                .attr('class', pathclass)
-	                .merge(markers)
-	                .attr('marker-mid', marker)
-	                .attr('d', function(d) { return d.d; });
+	          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 (detected.ie) {
-	                markers.each(function() { this.parentNode.insertBefore(this, this); });
-	            }
-	        }
+	          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
+	      })];
 
-	        var getPath = svgPath(projection, graph);
-	        var ways = [];
-	        var onewaydata = {};
-	        var sideddata = {};
-	        var oldMultiPolygonOuters = {};
+	      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'));
+	        };
+	      }
+	    }
+	  };
 
-	        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);
-	            }
-	        }
+	  function continueDrawing(way, vertex, context) {
+	    // make sure the vertex is actually visible and editable
+	    var map = context.map();
 
-	        ways = ways.filter(getPath);
-	        var pathdata = utilArrayGroupBy(ways, function(way) { return way.layer(); });
+	    if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+	      map.zoomToEase(vertex);
+	    }
 
-	        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));
-	        });
+	    context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
+	  }
 
+	  validation.type = type;
+	  return validation;
+	}
 
-	        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 + ')';
-	                }
-	            );
-	        });
+	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;
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, ways, filter);
+	    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'));
+	      };
 	    }
+	  };
 
-
-	    return drawLines;
+	  validation.type = type;
+	  return validation;
 	}
 
-	function svgMidpoints(projection, context) {
-	    var targetRadius = 8;
+	function validationMaprules() {
+	  var type = 'maprules';
 
-	    function drawTargets(selection, graph, entities, filter) {
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var getTransform = svgPointTransform(projection).geojson;
+	  var validation = function checkMaprules(entity, graph) {
+	    if (!services.maprules) return [];
+	    var rules = services.maprules.validationRules();
+	    var issues = [];
 
-	        var data = entities.map(function(midpoint) {
-	            return {
-	                type: 'Feature',
-	                id: midpoint.id,
-	                properties: {
-	                    target: true,
-	                    entity: midpoint
-	                },
-	                geometry: {
-	                    type: 'Point',
-	                    coordinates: midpoint.loc
-	                }
-	            };
-	        });
+	    for (var i = 0; i < rules.length; i++) {
+	      var rule = rules[i];
+	      rule.findIssues(entity, graph, issues);
+	    }
 
-	        var targets = selection.selectAll('.midpoint.target')
-	            .filter(function(d) { return filter(d.properties.entity); })
-	            .data(data, function key(d) { return d.id; });
+	    return issues;
+	  };
 
-	        // exit
-	        targets.exit()
-	            .remove();
+	  validation.type = type;
+	  return validation;
+	}
 
-	        // 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);
-	    }
+	function validationMismatchedGeometry() {
+	  var type = 'mismatched_geometry';
 
+	  function tagSuggestingLineIsArea(entity) {
+	    if (entity.type !== 'way' || entity.isClosed()) return null;
+	    var tagSuggestingArea = entity.tagSuggestingArea();
 
-	    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 (!tagSuggestingArea) {
+	      return null;
+	    }
 
-	        var mode = context.mode();
-	        if ((mode && mode.id !== 'select') || !context.map().withinEditableZoom()) {
-	            drawLayer.selectAll('.midpoint').remove();
-	            touchLayer.selectAll('.midpoint.target').remove();
-	            return;
-	        }
+	    var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
+	    var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
 
-	        var poly = extent.polygon();
-	        var midpoints = {};
+	    if (asLine && asArea && asLine === asArea) {
+	      // these tags also allow lines and making this an area wouldn't matter
+	      return null;
+	    }
 
-	        for (var i = 0; i < entities.length; i++) {
-	            var entity = entities[i];
+	    return tagSuggestingArea;
+	  }
 
-	            if (entity.type !== 'way') { continue; }
-	            if (!filter(entity)) { continue; }
-	            if (context.selectedIDs().indexOf(entity.id) < 0) { continue; }
+	  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 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('-');
+	    if (firstToLastDistanceMeters < 0.75) {
+	      testNodes = nodes.slice(); // shallow copy
 
-	                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;
+	      testNodes.pop();
+	      testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-	                    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;
-	                            }
-	                        }
-	                    }
+	      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
 
-	                    if (loc) {
-	                        midpoints[id] = {
-	                            type: 'midpoint',
-	                            id: id,
-	                            loc: loc,
-	                            edge: [a.id, b.id],
-	                            parents: [entity]
-	                        };
-	                    }
-	                }
-	            }
-	        }
 
+	    testNodes = nodes.slice(); // shallow copy
 
-	        function midpointFilter(d) {
-	            if (midpoints[d.id])
-	                { return true; }
+	    testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-	            for (var i = 0; i < d.parents.length; i++) {
-	                if (filter(d.parents[i])) {
-	                    return true;
-	                }
-	            }
+	    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 false;
-	        }
+	  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
 
+	            for (var key in tagSuggestingArea) {
+	              delete tags[key];
+	            }
 
-	        var groups = drawLayer.selectAll('.midpoint')
-	            .filter(midpointFilter)
-	            .data(Object.values(midpoints), function(d) { return d.id; });
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
+	          }
+	        }));
+	        return fixes;
+	      }
+	    });
 
-	        groups.exit()
-	            .remove();
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.tag_suggests_area.reference'));
+	    }
+	  }
 
-	        var enter = groups.enter()
-	            .insert('g', ':first-child')
-	            .attr('class', 'midpoint');
+	  function vertexTaggedAsPointIssue(entity, graph) {
+	    // we only care about nodes
+	    if (entity.type !== 'node') return null; // ignore tagless points
 
-	        enter
-	            .append('polygon')
-	            .attr('points', '-6,8 10,0 -6,-8')
-	            .attr('class', 'shadow');
+	    if (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them
 
-	        enter
-	            .append('polygon')
-	            .attr('points', '-3,4 5,0 -3,-4')
-	            .attr('class', 'fill');
+	    if (entity.isOnAddressLine(graph)) return null;
+	    var geometry = entity.geometry(graph);
+	    var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
 
-	        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; }
-	            ));
+	    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;
 
-	        // Propagate data bindings.
-	        groups.select('polygon.shadow');
-	        groups.select('polygon.fill');
+	          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
 
+	              context.enter(modeSelect(context, [action.getExtractedNodeID()]));
+	            };
+	          }
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+	          return [new validationIssueFix({
+	            icon: 'iD-operation-extract',
+	            title: _t.html('issues.fix.extract_point.title'),
+	            onClick: extractOnClick
+	          })];
+	        }
+	      });
 	    }
 
-	    return drawMidpoints;
-	}
+	    return null;
+	  }
 
-	function svgPoints(projection, context) {
+	  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 = [];
 
-	    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');
-	    }
+	    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
 
-	    function sortY(a, b) {
-	        return b.loc[1] - a.loc[1];
+	      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);
 	    }
 
+	    return issues;
 
-	    // 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);
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unclosed_multipolygon_part.reference'));
 	    }
+	  }
 
+	  var validation = function checkMismatchedGeometry(entity, graph) {
+	    var issues = [vertexTaggedAsPointIssue(entity, graph), lineTaggedAsAreaIssue(entity)];
+	    issues = issues.concat(unclosedMultipolygonPartIssues(entity, graph));
+	    return issues.filter(Boolean);
+	  };
 
-	    function drawTargets(selection, graph, entities, filter) {
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        var getTransform = svgPointTransform(projection).geojson;
-	        var activeID = context.activeID();
-	        var data = [];
+	  validation.type = type;
+	  return validation;
+	}
 
-	        entities.forEach(function(node) {
-	            if (activeID === node.id) { return; }   // draw no target on the activeID
+	function validationMissingRole() {
+	  var type = 'missing_role';
 
-	            data.push({
-	                type: 'Feature',
-	                id: node.id,
-	                properties: {
-	                    target: true,
-	                    entity: node
-	                },
-	                geometry: node.asGeoJSON()
-	            });
-	        });
+	  var validation = function checkMissingRole(entity, graph) {
+	    var issues = [];
 
-	        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 (entity.type === 'way') {
+	      graph.parentRelations(entity).forEach(function (relation) {
+	        if (!relation.isMultipolygon()) return;
+	        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);
 
-	        // Draw touch targets..
-	        touchLayer
-	            .call(drawTargets, graph, points, filter);
+	        if (way && isMissingRole(member)) {
+	          issues.push(makeIssue(way, entity, member));
+	        }
+	      });
 	    }
 
+	    return issues;
+	  };
 
-	    return drawPoints;
-	}
+	  function isMissingRole(member) {
+	    return !member.role || !member.role.trim().length;
+	  }
 
-	function svgTurns(projection, context) {
+	  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
+	            }));
+	          }
+	        })];
+	      }
+	    });
 
-	    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.missing_role.multipolygon.reference'));
 	    }
+	  }
 
-	    function drawTurns(selection, graph, turns) {
+	  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
+	        }));
+	      }
+	    });
+	  }
 
-	        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
+	  validation.type = type;
+	  return validation;
+	}
 
-	            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
+	function validationMissingTag(context) {
+	  var type = 'missing_tag';
 
-	            return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' +
-	                'rotate(' + a * 180 / Math.PI + ')';
-	        }
+	  function hasDescriptiveTags(entity, graph) {
+	    var keys = Object.keys(entity.tags).filter(function (k) {
+	      if (k === 'area' || k === 'name') {
+	        return false;
+	      } else {
+	        return osmIsInterestingTag(k);
+	      }
+	    });
 
+	    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);
+	    }
 
-	        var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
-	        var touchLayer = selection.selectAll('.layer-touch.turns');
+	    return keys.length > 0;
+	  }
 
-	        // Draw turns..
-	        var groups = drawLayer.selectAll('g.turn')
-	            .data(turns, function(d) { return d.key; });
+	  function isUnknownRoad(entity) {
+	    return entity.type === 'way' && entity.tags.highway === 'road';
+	  }
 
-	        // exit
-	        groups.exit()
-	            .remove();
+	  function isUntypedRelation(entity) {
+	    return entity.type === 'relation' && !entity.tags.type;
+	  }
 
-	        // enter
-	        var groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'turn ' + d.key; });
+	  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
 
-	        var turnsEnter = groupsEnter
-	            .filter(function(d) { return !d.u; });
 
-	        turnsEnter.append('rect')
-	            .attr('transform', 'translate(-22, -12)')
-	            .attr('width', '44')
-	            .attr('height', '24');
+	    if (!subtype && isUnknownRoad(entity)) {
+	      subtype = 'highway_classification';
+	    }
 
-	        turnsEnter.append('use')
-	            .attr('transform', 'translate(-22, -12)')
-	            .attr('width', '44')
-	            .attr('height', '24');
+	    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..
 
-	        var uEnter = groupsEnter
-	            .filter(function(d) { return d.u; });
+	    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();
 
-	        uEnter.append('circle')
-	            .attr('r', '16');
+	        if (!disabledReasonID) {
+	          deleteOnClick = function deleteOnClick(context) {
+	            var id = this.issue.entityIds[0];
+	            var operation = operationDelete(context, [id]);
 
-	        uEnter.append('use')
-	            .attr('transform', 'translate(-16, -16)')
-	            .attr('width', '32')
-	            .attr('height', '32');
+	            if (!operation.disabled()) {
+	              operation();
+	            }
+	          };
+	        }
 
-	        // update
-	        groups = groups
-	            .merge(groupsEnter)
-	            .attr('opacity', function(d) { return d.direct === false ? '0.7' : null; })
-	            .attr('transform', turnTransform);
+	        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;
+	      }
+	    })];
 
-	        groups.select('use')
-	            .attr('xlink:href', icon);
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.' + referenceID + '.reference'));
+	    }
+	  };
 
-	        groups.select('rect');      // propagate bound data
-	        groups.select('circle');    // propagate bound data
+	  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());
+	};
 
-	        // Draw touch targets..
-	        var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-	        groups = touchLayer.selectAll('g.turn')
-	            .data(turns, function(d) { return d.key; });
+	// {
+	//   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"
+	// }
 
-	        // exit
-	        groups.exit()
-	            .remove();
+	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;
+	};
 
-	        // enter
-	        groupsEnter = groups.enter()
-	            .append('g')
-	            .attr('class', function(d) { return 'turn ' + d.key; });
+	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
+	};
 
-	        turnsEnter = groupsEnter
-	            .filter(function(d) { return !d.u; });
+	var matchGroups$1 = require$$0.matchGroups;
 
-	        turnsEnter.append('rect')
-	            .attr('class', 'target ' + fillClass)
-	            .attr('transform', 'translate(-22, -12)')
-	            .attr('width', '44')
-	            .attr('height', '24');
+	var matcher$1 = function matcher() {
+	  var _warnings = []; // array of match conflict pairs
 
-	        uEnter = groupsEnter
-	            .filter(function(d) { return d.u; });
+	  var _ambiguous = {};
+	  var _matchIndex = {};
+	  var matcher = {}; // Create an index of all the keys/simplenames for fast matching
 
-	        uEnter.append('circle')
-	            .attr('class', 'target ' + fillClass)
-	            .attr('r', '16');
+	  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');
+	    });
 
-	        // update
-	        groups = groups
-	            .merge(groupsEnter)
-	            .attr('transform', turnTransform);
+	    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.
 
-	        groups.select('rect');      // propagate bound data
-	        groups.select('circle');    // propagate bound data
+	      if (which === 'secondary' && parts.d) return;
 
+	      if (obj.countryCodes) {
+	        parts.countryCodes = obj.countryCodes.slice(); // copy
+	      }
 
-	        return this;
-	    }
+	      var nomatches = obj.nomatch || [];
 
-	    return drawTurns;
-	}
+	      if (nomatches.some(function (s) {
+	        return s === kvnd;
+	      })) {
+	        console.log("WARNING match/nomatch conflict for ".concat(kvnd));
+	        return;
+	      }
 
-	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]
-	    };
+	      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 = [];
 
-	    var _currHoverTarget;
-	    var _currPersistent = {};
-	    var _currHover = {};
-	    var _prevHover = {};
-	    var _currSelected = {};
-	    var _prevSelected = {};
-	    var _radii = {};
+	      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
 
-	    function sortY(a, b) {
-	        return b.loc[1] - a.loc[1];
-	    }
+	      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];
 
-	    // 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);
+	            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 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();
+	  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)
 
 
-	        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]; }
+	  matcher.matchParts = function (parts, countryCode) {
+	    var match = null;
+	    var inGroup = false; // fixme: we currently return a single match for ambiguous
 
-	            icons[entity.id] =
-	                entity.hasInterestingTags() &&
-	                _mainPresetIndex.match(entity, graph).icon;
+	    match = _ambiguous[parts.kv] && _ambiguous[parts.kv][parts.nsimple];
+	    if (match && matchesCountryCode(match)) return match; // try to return an exact match
 
-	            return icons[entity.id];
-	        }
+	    match = _matchIndex[parts.kv] && _matchIndex[parts.kv][parts.nsimple];
+	    if (match && matchesCountryCode(match)) return match; // look in match groups
 
+	    for (var mg in matchGroups$1) {
+	      var matchGroup = matchGroups$1[mg];
+	      match = null;
+	      inGroup = false;
 
-	        // memoize directions results, return false for empty arrays (for use in filter)
-	        function getDirections(entity) {
-	            if (entity.id in directions) { return directions[entity.id]; }
+	      for (var i = 0; i < matchGroup.length; i++) {
+	        var otherkv = matchGroup[i].toLowerCase();
 
-	            var angles = entity.directions(graph, projection);
-	            directions[entity.id] = angles.length ? angles : false;
-	            return angles;
+	        if (!inGroup) {
+	          inGroup = otherkv === parts.kv;
 	        }
 
+	        if (!match) {
+	          // fixme: we currently return a single match for ambiguous
+	          match = _ambiguous[otherkv] && _ambiguous[otherkv][parts.nsimple];
+	        }
 
-	        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;
-	                        }
+	        if (!match) {
+	          match = _matchIndex[otherkv] && _matchIndex[otherkv][parts.nsimple];
+	        }
 
-	                        if (klass === 'shadow') {   // remember this value, so we don't need to
-	                            _radii[entity.id] = r;  // recompute it when we draw the touch targets
-	                        }
+	        if (match && !matchesCountryCode(match)) {
+	          match = null;
+	        }
 
-	                        select(this)
-	                            .attr('r', r)
-	                            .attr('visibility', (i && klass === 'fill') ? 'hidden' : null);
-	                    });
-	            });
+	        if (inGroup && match) {
+	          return match;
 	        }
+	      }
+	    }
 
-	        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' : '');
-	            });
+	    return null;
 
+	    function matchesCountryCode(match) {
+	      if (!countryCode) return true;
+	      if (!match.countryCodes) return true;
+	      return match.countryCodes.indexOf(countryCode) !== -1;
+	    }
+	  };
 
-	        // 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()
-	                });
-	            }
-	        });
+	  matcher.getWarnings = function () {
+	    return _warnings;
+	  };
 
-	        // 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;
-	                }
-	            }
-	        }
+	  return matcher;
+	};
 
-	        ids.forEach(function(id) {
-	            var entity = graph.hasEntity(id);
-	            if (!entity) { return; }
+	var fromCharCode = String.fromCharCode;
+	var nativeFromCodePoint = String.fromCodePoint;
 
-	            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);
-	            }
-	        });
+	// length should be 1, old FF problem
+	var INCORRECT_LENGTH = !!nativeFromCodePoint && nativeFromCodePoint.length != 1;
 
-	        return results;
-	    }
+	// `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('');
+	  }
+	});
 
+	var quickselect$2 = createCommonjsModule(function (module, exports) {
+	  (function (global, factory) {
+	     module.exports = factory() ;
+	  })(commonjsGlobal, function () {
 
-	    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;
-	            }
+	    function quickselect(arr, k, left, right, compare) {
+	      quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+	    }
 
-	            // whatever this is, it's not a persistent vertex..
-	            if (!keep && !fullRedraw) {
-	                delete _currPersistent[entity.id];
-	            }
+	    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);
 	        }
 
-	        // 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);
+	        var t = arr[k];
+	        var i = left;
+	        var j = right;
+	        swap(arr, left, k);
+	        if (compare(arr[right], t) > 0) swap(arr, left, right);
 
-	        // 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);
+	        while (i < j) {
+	          swap(arr, i, j);
+	          i++;
+	          j--;
 
-	        // 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);
+	          while (compare(arr[i], t) < 0) {
+	            i++;
+	          }
 
+	          while (compare(arr[j], t) > 0) {
+	            j--;
+	          }
+	        }
 
-	        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); });
+	        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;
+	      }
 	    }
 
+	    function swap(arr, i, j) {
+	      var tmp = arr[i];
+	      arr[i] = arr[j];
+	      arr[j] = tmp;
+	    }
 
-	    // 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());
+	    function defaultCompare(a, b) {
+	      return a < b ? -1 : a > b ? 1 : 0;
+	    }
 
-	        _prevSelected = _currSelected || {};
-	        if (context.map().isInWideSelection()) {
-	            _currSelected = {};
-	            context.selectedIDs().forEach(function(id) {
-	                var entity = graph.hasEntity(id);
-	                if (!entity) { return; }
+	    return quickselect;
+	  });
+	});
 
-	                if (entity.type === 'node') {
-	                    if (renderAsVertex(entity, graph, wireframe, zoom)) {
-	                        _currSelected[entity.id] = entity;
-	                    }
-	                }
-	            });
+	var rbush_1 = rbush;
+	var _default$2 = rbush;
 
-	        } else {
-	            _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
-	        }
+	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
 
-	        // 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);
-	    };
+	  this._maxEntries = Math.max(4, maxEntries || 9);
+	  this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
 
+	  if (format) {
+	    this._initFormat(format);
+	  }
 
-	    // partial redraw - only update the hovered items..
-	    drawVertices.drawHover = function(selection, graph, target, extent) {
-	        if (target === _currHoverTarget) { return; }  // continue only if something changed
+	  this.clear();
+	}
 
-	        var wireframe = context.surface().classed('fill-wireframe');
-	        var zoom = geoScaleToZoom(projection.scale());
+	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;
 
-	        _prevHover = _currHover || {};
-	        _currHoverTarget = target;
-	        var entity = target && target.properties && target.properties.entity;
+	    while (node) {
+	      for (i = 0, len = node.children.length; i < len; i++) {
+	        child = node.children[i];
+	        childBBox = node.leaf ? toBBox(child) : child;
 
-	        if (entity) {
-	            _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
-	        } else {
-	            _currHover = {};
+	        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);
 	        }
+	      }
 
-	        // 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);
+	      node = nodesToSearch.pop();
 	    }
-	    target.on(typeOnce, one, capture);
-	    return this;
-	}
 
-	// Adapted from d3-zoom to handle pointer events.
+	    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;
 
-	// Ignore right-click, since that should open the context menu.
-	function defaultFilter$2() {
-	  return !event.ctrlKey && !event.button;
-	}
+	        if (intersects$1(bbox, childBBox)) {
+	          if (node.leaf || contains$1(bbox, childBBox)) return true;
+	          nodesToSearch.push(child);
+	        }
+	      }
 
-	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]];
+	      node = nodesToSearch.pop();
 	    }
-	    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);
-	}
+	    return false;
+	  },
+	  load: function load(data) {
+	    if (!(data && data.length)) return this;
 
-	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)
-	  );
-	}
+	    if (data.length < this._minEntries) {
+	      for (var i = 0, len = data.length; i < len; i++) {
+	        this.insert(data[i]);
+	      }
 
-	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;
+	      return this;
+	    } // recursively build the tree with the given data from scratch using OMT algorithm
 
-	  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);
-	  }
+	    var node = this._build(data.slice(), 0, data.length - 1, 0);
 
-	  zoom.transform = function(collection, transform, point) {
-	    var selection = collection.selection ? collection.selection() : collection;
-	    if (collection !== selection) {
-	      schedule(collection, transform, point);
+	    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 {
-	      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 = _transform.k,
-	          k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
-	      return k0 * k1;
-	    }, p);
-	  };
+	      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
 
-	  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);
-	  };
 
-	  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);
-	    });
-	  };
+	      this._insert(node, this.data.height - node.height - 1, true);
+	    }
 
-	  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);
-	  };
+	    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
 
-	  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);
-	  }
+	    while (node || path.length) {
+	      if (!node) {
+	        // go up
+	        node = path.pop();
+	        parent = path[path.length - 1];
+	        i = indexes.pop();
+	        goingUp = true;
+	      }
 
-	  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);
-	  }
+	      if (node.leaf) {
+	        // check current node
+	        index = findItem$1(item, node.children, equalsFn);
 
-	  function centroid(extent) {
-	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
-	  }
+	        if (index !== -1) {
+	          // item found, remove the item and condense tree upwards
+	          node.children.splice(index, 1);
+	          path.push(node);
 
-	  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);
-	          };
-	        });
-	  }
+	          this._condense(path);
 
-	  function gesture(that, args, clean) {
-	    return (!clean && _activeGesture) || new Gesture(that, args);
-	  }
+	          return this;
+	        }
+	      }
 
-	  function Gesture(that, args) {
-	    this.that = that;
-	    this.args = args;
-	    this.active = 0;
-	    this.extent = extent.apply(that, args);
-	  }
+	      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
 
-	  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');
-	      }
-	      return this;
-	    },
-	    emit: function(type) {
-	      customEvent(new ZoomEvent(zoom, type, _transform), listeners.apply, listeners, [type, this.that, this.args]);
 	    }
-	  };
 
-	  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);
+	    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 = [];
 
-	    // 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);
+	    while (node) {
+	      if (node.leaf) result.push.apply(result, node.children);else nodesToSearch.push.apply(nodesToSearch, node.children);
+	      node = nodesToSearch.pop();
+	    }
 
-	    // Otherwise, capture the mouse point and location at the start.
-	    } else {
-	      g.mouse = [p, t.invert(p)];
-	      interrupt(this);
-	      g.start();
+	    return result;
+	  },
+	  _build: function _build(items, left, right, height) {
+	    var N = right - left + 1,
+	        M = this._maxEntries,
+	        node;
+
+	    if (N <= M) {
+	      // reached leaf level; return leaf
+	      node = createNode$1(items.slice(left, right + 1));
+	      calcBBox$1(node, this.toBBox);
+	      return node;
 	    }
 
-	    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 (!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
 
-	    function wheelidled() {
-	      g.wheel = null;
-	      g.end();
+	      M = Math.ceil(N / Math.pow(M, height - 1));
 	    }
-	  }
 
-	  var _downPointerIDs = new Set();
-	  var _pointerLocGetter;
+	    node = createNode$1([]);
+	    node.leaf = false;
+	    node.height = height; // split the items into M mostly square tiles
 
-	  function pointerdown() {
-	    _downPointerIDs.add(event.pointerId);
+	    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);
 
-	    if (!filter.apply(this, arguments)) { return; }
+	    for (i = left; i <= right; i += N1) {
+	      right2 = Math.min(i + N1 - 1, right);
+	      multiSelect$1(items, i, right2, N2, this.compareMinY);
 
-	    var g = gesture(this, arguments, _downPointerIDs.size === 1);
-	    var started;
+	      for (j = i; j <= right2; j += N2) {
+	        right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
-	    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;
+	        node.children.push(this._build(items, j, right3, height - 1));
+	      }
+	    }
+
+	    calcBBox$1(node, this.toBBox);
+	    return node;
+	  },
+	  _chooseSubtree: function _chooseSubtree(bbox, node, level, path) {
+	    var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
+
+	    while (true) {
+	      path.push(node);
+	      if (node.leaf || path.length - 1 === level) break;
+	      minArea = minEnlargement = Infinity;
+
+	      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;
+	          }
+	        }
+	      }
 
-	    } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
-	       g.pointer1 = p;
+	      node = targetNode || node.children[0];
 	    }
 
-	    if (started) {
-	      interrupt(this);
-	      g.start();
-	    }
-	  }
+	    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
 
-	  function pointermove() {
-	    if (!_downPointerIDs.has(event.pointerId)) { return; }
+	    var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
-	    if (!_activeGesture || !_pointerLocGetter) { return; }
 
-	    var g = gesture(this, arguments);
+	    node.children.push(item);
+	    extend$3(node, bbox); // split on node overflow; propagate upwards if necessary
 
-	    var isPointer0 = g.pointer0 && g.pointer0[2] === event.pointerId;
-	    var isPointer1 = !isPointer0 && g.pointer1 && g.pointer1[2] === event.pointerId;
+	    while (level >= 0) {
+	      if (insertPath[level].children.length > this._maxEntries) {
+	        this._split(insertPath, level);
 
-	    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;
-	    }
+	        level--;
+	      } else break;
+	    } // adjust bboxes along the insertion path
 
-	    event.preventDefault();
-	    event.stopImmediatePropagation();
 
-	    var loc = _pointerLocGetter(event);
-	    var t, p, l;
+	    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;
 
-	    if (isPointer0) { g.pointer0[0] = loc; }
-	    else if (isPointer1) { g.pointer1[0] = loc; }
+	    this._chooseSplitAxis(node, m, M);
 
-	    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];
-	    }
-	    else { return; }
-	    g.zoom('touch', constrain(translate(t, p, l), g.extent, translateExtent));
-	  }
+	    var splitIndex = this._chooseSplitIndex(node, m, M);
 
-	  function pointerup() {
-	    if (!_downPointerIDs.has(event.pointerId)) { return; }
+	    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;
+	        }
+	      }
+	    }
 
-	    _downPointerIDs.delete(event.pointerId);
+	    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
 
-	    if (!_activeGesture) { return; }
 
-	    var g = gesture(this, arguments);
+	    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;
 
-	    event.stopImmediatePropagation();
+	    for (i = m; i < M - m; i++) {
+	      child = node.children[i];
+	      extend$3(leftBBox, node.leaf ? toBBox(child) : child);
+	      margin += bboxMargin$1(leftBBox);
+	    }
 
-	    if (g.pointer0 && g.pointer0[2] === event.pointerId) { delete g.pointer0; }
-	    else if (g.pointer1 && g.pointer1[2] === event.pointerId) { delete g.pointer1; }
+	    for (i = M - m - 1; i >= m; i--) {
+	      child = node.children[i];
+	      extend$3(rightBBox, node.leaf ? toBBox(child) : child);
+	      margin += bboxMargin$1(rightBBox);
+	    }
 
-	    if (g.pointer1 && !g.pointer0) {
-	      g.pointer0 = g.pointer1;
-	      delete g.pointer1;
+	    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);
 	    }
-	    if (g.pointer0) { g.pointer0[1] = _transform.invert(g.pointer0[0]); }
-	    else {
-	      g.end();
+	  },
+	  _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] + '};');
 	  }
+	};
 
-	  zoom.wheelDelta = function(_) {
-	    return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
-	  };
+	function findItem$1(item, items, equalsFn) {
+	  if (!equalsFn) return items.indexOf(item);
 
-	  zoom.filter = function(_) {
-	    return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
-	  };
+	  for (var i = 0; i < items.length; i++) {
+	    if (equalsFn(item, items[i])) return i;
+	  }
 
-	  zoom.extent = function(_) {
-	    return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
-	  };
+	  return -1;
+	} // calculate node's bbox from bboxes of its children
 
-	  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 calcBBox$1(node, toBBox) {
+	  distBBox$1(node, 0, node.children.length, toBBox, node);
+	} // min bounding rectangle of node children from k to p-1
 
-	  zoom.constrain = function(_) {
-	    return arguments.length ? (constrain = _, zoom) : constrain;
-	  };
 
-	  zoom.interpolate = function(_) {
-	    return arguments.length ? (interpolate = _, zoom) : interpolate;
-	  };
+	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;
 
-	  zoom._transform = function(_) {
-	    return arguments.length ? (_transform = _, zoom) : _transform;
-	  };
+	  for (var i = k, child; i < p; i++) {
+	    child = node.children[i];
+	    extend$3(destNode, node.leaf ? toBBox(child) : child);
+	  }
 
-	  zoom.on = function() {
-	    var value = listeners.on.apply(listeners, arguments);
-	    return value === listeners ? zoom : value;
-	  };
+	  return destNode;
+	}
 
-	  return zoom;
+	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;
 	}
 
-	// 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 compareNodeMinX$1(a, b) {
+	  return a.minX - b.minX;
+	}
 
-	    var dispatch$1 = dispatch('doubleUp');
+	function compareNodeMinY$1(a, b) {
+	  return a.minY - b.minY;
+	}
 
-	    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
+	function bboxArea$1(a) {
+	  return (a.maxX - a.minX) * (a.maxY - a.minY);
+	}
 
-	    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;
-	    }
+	function bboxMargin$1(a) {
+	  return a.maxX - a.minX + (a.maxY - a.minY);
+	}
 
-	    function pointerdown() {
+	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));
+	}
 
-	        // ignore right-click
-	        if (event.ctrlKey || event.button === 2) { return; }
+	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 loc = [event.clientX, event.clientY];
+	function contains$1(a, b) {
+	  return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+	}
 
-	        // 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 intersects$1(a, b) {
+	  return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+	}
 
-	        if (!_pointer) {
-	            _pointer = {
-	                startLoc: loc,
-	                startTime: new Date().getTime(),
-	                upCount: 0,
-	                pointerId: event.pointerId
-	            };
-	        } else { // double down
-	            _pointer.pointerId = event.pointerId;
-	        }
-	    }
+	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
 
-	    function pointerup() {
 
-	        // ignore right-click
-	        if (event.ctrlKey || event.button === 2) { return; }
+	function multiSelect$1(arr, left, right, n, compare) {
+	  var stack = [left, right],
+	      mid;
 
-	        if (!_pointer || _pointer.pointerId !== event.pointerId) { return; }
+	  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;
 
-	        _pointer.upCount += 1;
+	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
 
-	        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);
-	            }
-	            // clear the pointer info in any case
-	            _pointer = undefined;
-	        }
-	    }
+	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 = [];
 
-	    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));
-	                });
+	  for (i = 1; i < len; i++) {
+	    a = points[i - 1];
+	    b = points[i];
+	    codeB = lastCode = bitCode$1(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);
 	        }
+
+	        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);
+	      }
 	    }
 
-	    doubleUp.off = function(selection) {
-	        selection
-	            .on('pointerdown.doubleUp', null)
-	            .on('pointerup.doubleUp', null)
-	            .on('dblclick.doubleUp', null);
-	    };
+	    codeA = lastCode;
+	  }
 
-	    return utilRebind(doubleUp, dispatch$1, 'on');
-	}
+	  if (part.length) result.push(part);
+	  return result;
+	} // Sutherland-Hodgeman polygon clipping algorithm
 
-	// constants
-	var TILESIZE = 256;
-	var minZoom = 2;
-	var maxZoom = 24;
-	var kMin = geoZoomToScale(minZoom, TILESIZE);
-	var kMax = geoZoomToScale(maxZoom, TILESIZE);
 
-	function clamp(num, min, max) {
-	    return Math.max(min, Math.min(num, max));
-	}
+	function polygonclip$1(points, bbox) {
+	  var result, edge, prev, prevInside, i, p, inside; // 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);
 
-	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 });
-	    // }
+	    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
+
+	      if (inside !== prevInside) result.push(intersect$1(prev, p, edge, bbox));
+	      if (inside) result.push(p); // add a point if it's inside
 
-	    function cancelPendingRedraw() {
-	        scheduleRedraw.cancel();
-	        // isRedrawScheduled = false;
-	        // window.cancelIdleCallback(pendingRedrawCall);
+	      prev = p;
+	      prevInside = inside;
 	    }
 
+	    points = result;
+	    if (!points.length) break;
+	  }
 
-	    function map(selection) {
-	        _selection = selection;
+	  return result;
+	} // intersect a segment against one of the 4 lines that make up the bbox
 
-	        context
-	            .on('change.map', immediateRedraw);
 
-	        var osm = context.connection();
-	        if (osm) {
-	            osm.on('change.map', immediateRedraw);
-	        }
+	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
 
-	        function didUndoOrRedo(targetTransform) {
-	            var mode = context.mode().id;
-	            if (mode !== 'browse' && mode !== 'select') { return; }
-	            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);
-	            });
+	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
 
-	        context.background()
-	            .on('change.map', immediateRedraw);
+	  if (p[1] < bbox[1]) code |= 4; // bottom
+	  else if (p[1] > bbox[3]) code |= 8; // top
 
-	        context.features()
-	            .on('redraw.map', immediateRedraw);
+	  return code;
+	}
 
-	        drawLayers
-	            .on('change.map', function() {
-	                context.background().updateImagery();
-	                immediateRedraw();
-	            });
+	var whichPolygon_1 = whichPolygon;
 
-	        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 });
-	                }
-	            });
+	function whichPolygon(data) {
+	  var bboxes = [];
 
-	        var detected = utilDetect();
+	  for (var i = 0; i < data.features.length; i++) {
+	    var feature = data.features[i];
+	    var coords = feature.geometry.coordinates;
 
-	        // 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 (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));
+	      }
+	    }
+	  }
 
-	            // 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);
-	        }
+	  var tree = rbush_1().load(bboxes);
 
-	        // must call after surface init
-	        updateAreaFill();
+	  function query(p, multi) {
+	    var output = [],
+	        result = tree.search({
+	      minX: p[0],
+	      minY: p[1],
+	      maxX: p[0],
+	      maxY: p[1]
+	    });
 
-	        _doubleUpHandler.on('doubleUp.map', function(p0) {
-	            if (!_dblClickZoomEnabled) { return; }
+	    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;
+	      }
+	    }
 
-	            // 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; }
+	    return multi && output.length ? output : null;
+	  }
 
-	            var zoomOut = event.shiftKey;
+	  query.tree = tree;
 
-	            var t = projection.transform();
+	  query.bbox = function queryBBox(bbox) {
+	    var output = [];
+	    var result = tree.search({
+	      minX: bbox[0],
+	      minY: bbox[1],
+	      maxX: bbox[2],
+	      maxY: bbox[3]
+	    });
 
-	            var p1 = t.invert(p0);
+	    for (var i = 0; i < result.length; i++) {
+	      if (polygonIntersectsBBox(result[i].coords, bbox)) {
+	        output.push(result[i].props);
+	      }
+	    }
 
-	            t = t.scale(zoomOut ? 0.5 : 2);
+	    return output;
+	  };
 
-	            t.x = p0[0] - p1[0] * t.k;
-	            t.y = p0[1] - p1[1] * t.k;
+	  return query;
+	}
 
-	            map.transformEase(t);
-	        });
+	function polygonIntersectsBBox(polygon, bbox) {
+	  var bboxCenter = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
+	  if (insidePolygon(polygon, bboxCenter)) return true;
 
-	        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; };
+	  for (var i = 0; i < polygon.length; i++) {
+	    if (lineclip_1$1(polygon[i], bbox).length > 0) return true;
+	  }
 
-	            data = context.features().filter(data, graph);
+	  return false;
+	} // ray casting algorithm for detecting if point is in polygon
 
-	            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 });
+	function insidePolygon(rings, p) {
+	  var inside = false;
 
-	            // redraw everything else later
-	            scheduleRedraw();
-	        });
+	  for (var i = 0, len = rings.length; i < len; i++) {
+	    var ring = rings[i];
 
-	        map.dimensions(utilGetDimensions(selection));
+	    for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
+	      if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
 	    }
+	  }
 
+	  return inside;
+	}
 
-	    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);
-	            }
-	        }
+	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 event.button !== 2;   // ignore right clicks
-	    }
+	function treeItem(coords, props) {
+	  var item = {
+	    minX: Infinity,
+	    minY: Infinity,
+	    maxX: -Infinity,
+	    maxY: -Infinity,
+	    coords: coords,
+	    props: props
+	  };
 
+	  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]);
+	  }
 
-	    function pxCenter() {
-	        return [_dimensions[0] / 2, _dimensions[1] / 2];
-	    }
+	  return item;
+	}
 
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-	        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 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);
 
-	        } 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;
-	            }
+	function loadDerivedDataAndCaches(borders) {
+	  var identifierProps = ['iso1A2', 'iso1A3', 'm49', 'wikidata', 'emojiFlag', 'nameEn'];
+	  var geometryFeatures = [];
 
-	            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); };
+	  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);
+	    });
 
-	            } else {
-	                data = all;
-	                fullRedraw = true;
-	                filter = utilFunctor(true);
-	            }
-	        }
+	    loadMembersForGroupsOf(_feature2);
+	  }
 
-	        if (applyFeatureLayerFilters) {
-	            data = features.filter(data, graph);
-	        } else {
-	            context.features().resetStats();
-	        }
+	  var geometryOnlyCollection = {
+	    type: 'RegionFeatureCollection',
+	    features: geometryFeatures
+	  };
+	  whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
 
-	        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 loadGroups(feature) {
+	    var props = feature.properties;
 
-	        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 (!props.groups) {
+	      props.groups = [];
+	    }
 
-	        dispatch$1.call('drawn', this, {full: true});
+	    if (props.country) {
+	      props.groups.push(props.country);
 	    }
 
-	    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);
-	    };
+	    if (props.m49 !== '001') {
+	      props.groups.push('001');
+	    }
+	  }
 
-	    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
-	        };
+	  function loadM49(feature) {
+	    var props = feature.properties;
 
-	        var mode = context.mode();
-	        if (mode && !allowed[mode.id]) {
-	            context.enter(modeBrowse(context));
-	        }
+	    if (!props.m49 && props.iso1N3) {
+	      props.m49 = props.iso1N3;
+	    }
+	  }
+
+	  function loadIsoStatus(feature) {
+	    var props = feature.properties;
 
-	        dispatch$1.call('drawn', this, {full: true});
+	    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 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();
+	  function loadDriveSide(feature) {
+	    var props = feature.properties;
 
-	        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
-	        };
+	    if (props.driveSide === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
+	      props.driveSide = 'right';
+	    }
+	  }
 
-	        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
-	                );
+	  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;
+	  }
 
-	                // 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;
-	                }
+	  function loadMembersForGroupsOf(feature) {
+	    var featureID = feature.properties.id;
+	    var standardizedGroupIDs = [];
 
-	                // 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);
-	            }
+	    for (var j in feature.properties.groups) {
+	      var groupID = feature.properties.groups[j];
+	      var groupFeature = featuresByCode[groupID];
+	      standardizedGroupIDs.push(groupFeature.properties.id);
 
-	            // 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 (groupFeature.properties.members) {
+	        groupFeature.properties.members.push(featureID);
+	      } else {
+	        groupFeature.properties.members = [featureID];
+	      }
+	    }
 
-	        }
+	    feature.properties.groups = standardizedGroupIDs;
+	  }
 
-	        if (_transformStart.x === x &&
-	            _transformStart.y === y &&
-	            _transformStart.k === k) {
-	            return;  // no change
-	        }
+	  function cacheFeatureByIDs(feature) {
+	    for (var k in identifierProps) {
+	      var prop = identifierProps[k];
+	      var id = prop && feature.properties[prop];
 
-	        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 (id) {
+	        id = id.replace(idFilterRegex, '').toUpperCase();
+	        featuresByCode[id] = feature;
+	      }
+	    }
 
-	        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 (feature.properties.aliases) {
+	      for (var j in feature.properties.aliases) {
+	        var alias = feature.properties.aliases[j].replace(idFilterRegex, '').toUpperCase();
+	        featuresByCode[alias] = feature;
+	      }
+	    }
+	  }
+	}
 
-	        projection.transform(eventTransform);
+	function locArray(loc) {
+	  if (Array.isArray(loc)) {
+	    return loc;
+	  } else if (loc.coordinates) {
+	    return loc.coordinates;
+	  }
 
-	        var scale = k / _transformStart.k;
-	        var tX = (x / scale - _transformStart.x) * scale;
-	        var tY = (y / scale - _transformStart.y) * scale;
+	  return loc.geometry.coordinates;
+	}
 
-	        if (context.inIntro()) {
-	            curtainProjection.transform({
-	                x: x - tX,
-	                y: y - tY,
-	                k: k
-	            });
-	        }
+	function smallestFeature(loc) {
+	  var query = locArray(loc);
+	  var featureProperties = whichPolygonGetter(query);
+	  if (!featureProperties) return null;
+	  return featuresByCode[featureProperties.id];
+	}
 
-	        if (source) {
-	            _lastPointerEvent = event$1;
-	        }
-	        _isTransformed = true;
-	        _transformLast = eventTransform;
-	        utilSetTransform(supersurface, tX, tY, scale);
-	        scheduleRedraw();
+	function countryFeature(loc) {
+	  var feature = smallestFeature(loc);
+	  if (!feature) return null;
+	  var countryCode = feature.properties.country || feature.properties.iso1A2;
+	  return featuresByCode[countryCode];
+	}
 
-	        dispatch$1.call('move', this, map);
+	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];
 
-	        function isInteger(val) {
-	            return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
-	        }
+	      if (_feature3.properties.level === targetLevel || levels.indexOf(_feature3.properties.level) > targetLevelIndex) {
+	        return _feature3;
+	      }
 	    }
 
+	    return null;
+	  }
 
-	    function resetTransform() {
-	        if (!_isTransformed) { return false; }
+	  return countryFeature(loc);
+	}
 
-	        utilSetTransform(supersurface, 0, 0);
-	        _isTransformed = false;
-	        if (context.inIntro()) {
-	            curtainProjection.transform(projection.transform());
-	        }
-	        return true;
+	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();
+	  }
 
+	  return featuresByCode[stringID] || null;
+	}
 
-	    function redraw(difference, extent) {
-	        if (surface.empty() || !_redrawEnabled) { return; }
+	function smallestOrMatchingFeature(query) {
+	  if (_typeof(query) === 'object') {
+	    return smallestFeature(query);
+	  }
 
-	        // 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;
-	        }
+	  return featureForID(query);
+	}
 
-	        var zoom = map.zoom();
-	        var z = String(~~zoom);
+	function feature(query, opts) {
+	  if (_typeof(query) === 'object') {
+	    return featureForLoc(query, opts);
+	  }
 
-	        if (surface.attr('data-zoom') !== z) {
-	            surface.attr('data-zoom', z);
-	        }
+	  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 = [];
 
-	        // 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);
+	  if (!strict || _typeof(query) === 'object') {
+	    features.push(feature);
+	  }
 
-	        surface
-	            .classed('low-zoom', zoom <= lowzoom(lat));
+	  var properties = feature.properties;
 
+	  for (var i in properties.groups) {
+	    var groupID = properties.groups[i];
+	    features.push(featuresByCode[groupID]);
+	  }
 
-	        if (!difference) {
-	            supersurface.call(context.background());
-	            wrapper.call(drawLayers);
-	        }
+	  return features;
+	}
+	function roadSpeedUnit(query) {
+	  var feature = smallestOrMatchingFeature(query);
+	  return feature && feature.properties.roadSpeedUnit || null;
+	}
 
-	        // OSM
-	        if (map.editableDataEnabled() || map.isInWideSelection()) {
-	            context.loadTiles(projection);
-	            drawEditable(difference, extent);
-	        } else {
-	            editOff();
-	        }
+	var _dataDeprecated;
 
-	        _transformStart = projection.transform();
+	var _nsi;
 
-	        return map;
-	    }
+	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
 
+	  _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); // index all known wikipedia and wikidata tags
 
-	    var immediateRedraw = function(difference, extent) {
-	        if (!difference && !extent) { cancelPendingRedraw(); }
-	        redraw(difference, extent);
-	    };
 
+	    Object.keys(d.brands).forEach(function (kvnd) {
+	      var brand = d.brands[kvnd];
+	      var wd = brand.tags['brand:wikidata'];
+	      var wp = brand.tags['brand:wikipedia'];
 
-	    map.lastPointerEvent = function() {
-	        return _lastPointerEvent;
-	    };
+	      if (wd) {
+	        _nsi.wikidata[wd] = kvnd;
+	      }
 
+	      if (wp) {
+	        _nsi.wikipedia[wp] = kvnd;
+	      }
+	    });
+	    return _nsi;
+	  })["catch"](function () {
+	    /* ignore */
+	  });
 
-	    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);
-	        }
-	        return null;
-	    };
+	  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 []; // upgrade preset..
 
-	    // returns Lng/Lat
-	    map.mouseCoordinates = function() {
-	        var coord = map.mouse() || pxCenter();
-	        return projection.invert(coord);
-	    };
+	    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..
 
 
-	    map.dblclickZoomEnable = function(val) {
-	        if (!arguments.length) { return _dblClickZoomEnabled; }
-	        _dblClickZoomEnabled = val;
-	        return map;
-	    };
+	    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);
+	      }
+	    } // add missing addTags..
 
-	    map.redrawEnable = function(val) {
-	        if (!arguments.length) { return _redrawEnabled; }
-	        _redrawEnabled = val;
-	        return map;
-	    };
 
+	    var newTags = Object.assign({}, entity.tags); // shallow copy
 
-	    map.isTransformed = function() {
-	        return _isTransformed;
-	    };
+	    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 (_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;
 
-	    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; }
+	      if (newTags.wikidata) {
+	        // try matching `wikidata`
+	        isBrand = _nsi.wikidata[newTags.wikidata];
+	      }
 
-	        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 (!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;
 	        }
 
-	        return true;
-	    }
+	        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.
 
+	      } // try key/value|name match against name-suggestion-index
 
-	    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
+	      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);
 
-	        var k2 = clamp(geoZoomToScale(z2, TILESIZE), kMin, kMax);
-	        proj.scale(k2);
+	          var match = _nsi.matcher.matchKVN(k, newTags[k], newTags.name, countryCode && countryCode.toLowerCase());
 
-	        var t = proj.translate();
-	        var point = proj(loc2);
+	          if (!match) continue; // for now skip ambiguous matches (like Target~(USA) vs Target~(Australia))
 
-	        var center = pxCenter();
-	        t[0] += center[0] - point[0];
-	        t[1] += center[1] - point[1];
+	          if (match.d) continue;
+	          var brand = _nsi.brands[match.kvnd];
 
-	        return setTransform(identity$2.translate(t[0], t[1]).scale(k2), duration, force);
-	    }
+	          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];
+	              }
 
+	              return acc;
+	            }, {});
+	            nsiKeys.forEach(function (k) {
+	              return delete newTags[k];
+	            });
+	            Object.assign(newTags, brand.tags, keepTags);
+	            break;
+	          }
+	        }
+	      }
+	    } // determine diff
 
-	    map.pan = function(delta, duration) {
-	        var t = projection.translate();
-	        var k = projection.scale();
 
-	        t[0] += delta[0];
-	        t[1] += delta[1];
+	    var tagDiff = utilTagDiff(oldTags, newTags);
+	    if (!tagDiff.length) return [];
+	    var isOnlyAddingTags = tagDiff.every(function (d) {
+	      return d.type === '+';
+	    });
+	    var prefix = '';
 
-	        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();
-	        }
+	    if (subtype === 'noncanonical_brand') {
+	      prefix = 'noncanonical_brand.';
+	    } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
+	      subtype = 'incomplete_tags';
+	      prefix = 'incomplete.';
+	    } // don't allow autofixing brand tags
 
-	        return map;
-	    };
 
+	    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'));
+	          }
+	        })];
+	      }
+	    })];
 
-	    map.dimensions = function(val) {
-	        if (!arguments.length) { return _dimensions; }
+	    function doUpgrade(graph) {
+	      var currEntity = graph.hasEntity(entity.id);
+	      if (!currEntity) return graph;
+	      var newTags = Object.assign({}, currEntity.tags); // shallow copy
 
-	        _dimensions = val;
-	        drawLayers.dimensions(_dimensions);
-	        context.background().dimensions(_dimensions);
-	        projection.clipExtent([[0, 0], _dimensions]);
-	        _getMouseCoords = utilFastMouse(supersurface.node());
+	      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);
+	    }
 
-	        scheduleRedraw();
-	        return map;
-	    };
+	    function showMessage(context) {
+	      var currEntity = context.hasEntity(entity.id);
+	      if (!currEntity) return '';
+	      var messageID = "issues.outdated_tags.".concat(prefix, "message");
 
+	      if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
+	        messageID += '_incomplete';
+	      }
 
-	    function zoomIn(delta) {
-	        setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
+	      return _t.html(messageID, {
+	        feature: utilDisplayLabel(currEntity, context.graph())
+	      });
 	    }
 
-	    function zoomOut(delta) {
-	        setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
+	    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;
+	      });
 	    }
+	  }
 
-	    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; };
-
-	    map.center = function(loc2) {
-	        if (!arguments.length) {
-	            return projection.invert(pxCenter());
-	        }
+	  function oldMultipolygonIssues(entity, graph) {
+	    var multipolygon, outerWay;
 
-	        if (setCenterZoom(loc2, map.zoom())) {
-	            dispatch$1.call('move', this, map);
-	        }
+	    if (entity.type === 'relation') {
+	      outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
+	      multipolygon = entity;
+	    } else if (entity.type === 'way') {
+	      multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
+	      outerWay = entity;
+	    } else {
+	      return [];
+	    }
 
-	        scheduleRedraw();
-	        return map;
-	    };
+	    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'));
+	          }
+	        })];
+	      }
+	    })];
 
-	    map.unobscuredCenterZoomEase = function(loc, zoom) {
-	        var offset = map.unobscuredOffsetPx();
+	    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);
+	    }
 
-	        var proj = geoRawMercator().transform(projection.transform());  // copy projection
-	        // use the target zoom to calculate the offset center
-	        proj.scale(geoZoomToScale(zoom, TILESIZE));
+	    function showMessage(context) {
+	      var currMultipolygon = context.hasEntity(multipolygon.id);
+	      if (!currMultipolygon) return '';
+	      return _t.html('issues.old_multipolygon.message', {
+	        multipolygon: utilDisplayLabel(currMultipolygon, context.graph())
+	      });
+	    }
 
-	        var locPx = proj(loc);
-	        var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
-	        var offsetLoc = proj.invert(offsetLocPx);
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.old_multipolygon.reference'));
+	    }
+	  }
 
-	        map.centerZoomEase(offsetLoc, zoom);
-	    };
+	  var validation = function checkOutdatedTags(entity, graph) {
+	    var issues = oldMultipolygonIssues(entity, graph);
+	    if (!issues.length) issues = oldTagIssues(entity, graph);
+	    return issues;
+	  };
 
-	    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];
-	    };
+	  validation.type = type;
+	  return validation;
+	}
 
-	    map.zoom = function(z2) {
-	        if (!arguments.length) {
-	            return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
-	        }
+	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 = {};
 
-	        if (z2 < _minzoom) {
-	            surface.interrupt();
-	            dispatch$1.call('hitMinZoom', this, map);
-	            z2 = context.minEditableZoom();
-	        }
+	    for (var k in tags) {
+	      if (publicKeys[k]) return []; // probably a public feature
 
-	        if (setCenterZoom(map.center(), z2)) {
-	            dispatch$1.call('move', this, map);
-	        }
+	      if (!personalTags[k]) {
+	        keepTags[k] = tags[k];
+	      }
+	    }
 
-	        scheduleRedraw();
-	        return map;
-	    };
+	    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
 
-	    map.centerZoom = function(loc2, z2) {
-	        if (setCenterZoom(loc2, z2)) {
-	            dispatch$1.call('move', this, map);
+	      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);
+	    }
 
-	        scheduleRedraw();
-	        return map;
-	    };
-
-
-	    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);
-	    };
-
+	    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())
+	      });
+	    }
 
-	    map.centerEase = function(loc2, duration) {
-	        duration = duration || 250;
-	        setCenterZoom(loc2, map.zoom(), duration);
-	        return map;
-	    };
+	    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;
+	      });
+	    }
+	  };
 
+	  validation.type = type;
+	  return validation;
+	}
 
-	    map.zoomEase = function(z2, duration) {
-	        duration = duration || 250;
-	        setCenterZoom(map.center(), z2, duration, false);
-	        return map;
-	    };
+	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.
 
+	  _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 */
+	  });
 
-	    map.centerZoomEase = function(loc2, z2, duration) {
-	        duration = duration || 250;
-	        setCenterZoom(loc2, z2, duration, false);
-	        return map;
-	    };
+	  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")
 
 
-	    map.transformEase = function(t2, duration) {
-	        duration = duration || 250;
-	        setTransform(t2, duration, false /* don't force */);
-	        return map;
-	    };
+	  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();
 
-	    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 (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
+	          return true;
 	        }
-	        if (!isFinite(extent.area())) { return map; }
+	      }
+	    }
 
-	        var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-	        return map.centerZoomEase(extent.center(), z2, duration);
-	    };
+	    return false;
+	  }
 
+	  function isGenericName(name, tags) {
+	    name = name.toLowerCase();
+	    return nameMatchesRawTag(name, tags) || isDiscardedSuggestionName(name);
+	  }
 
-	    map.startEase = function() {
-	        utilBindOnce(surface, _pointerPrefix + 'down.ease', function() {
-	            map.cancelEase();
+	  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
 	        });
-	        return map;
-	    };
+	      },
+	      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
 
+	            delete tags[nameKey];
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation'));
+	          }
+	        })];
+	      }
+	    });
 
-	    map.cancelEase = function() {
-	        _selection.interrupt();
-	        return map;
-	    };
+	    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
 
-	    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));
-	        }
-	    };
+	            delete tags[nameKey];
+	            context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
+	          }
+	        })];
+	      }
+	    });
 
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
+	    }
+	  }
 
-	    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));
-	        }
-	    };
+	  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(';');
 
+	    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];
 
-	    function calcExtentZoom(extent, dim) {
-	        var tl = projection([extent[0][0], extent[1][1]]);
-	        var br = projection([extent[1][0], extent[0][1]]);
+	      if (notNames.length) {
+	        for (var i in notNames) {
+	          var notName = notNames[i];
 
-	        // 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);
+	          if (notName && value === notName) {
+	            issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
+	            continue;
+	          }
+	        }
+	      }
 
-	        return newZoom;
+	      if (isGenericName(value, entity.tags)) {
+	        issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
+	      }
 	    }
 
+	    return issues;
+	  };
 
-	    map.extentZoom = function(val) {
-	        return calcExtentZoom(geoExtent(val), _dimensions);
-	    };
+	  validation.type = type;
+	  return validation;
+	}
 
+	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
 
-	    map.trimmedExtentZoom = function(val) {
-	        var trimY = 120;
-	        var trimX = 40;
-	        var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
-	        return calcExtentZoom(geoExtent(val), trimmed);
-	    };
+	  var epsilon = 0.05;
+	  var nodeThreshold = 10;
 
+	  function isBuilding(entity, graph) {
+	    if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
+	    return entity.tags.building && entity.tags.building !== 'no';
+	  }
 
-	    map.withinEditableZoom = function() {
-	        return map.zoom() >= context.minEditableZoom();
-	    };
+	  var validation = function checkUnsquareWay(entity, graph) {
+	    if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare
 
+	    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
 
-	    map.isInWideSelection = function() {
-	        return !map.withinEditableZoom() && context.selectedIDs().length;
-	    };
+	    var nodes = graph.childNodes(entity).slice(); // shallow copy
 
+	    if (nodes.length > nodeThreshold + 1) return []; // +1 because closing node appears twice
+	    // ignore if not all nodes are fully downloaded
 
-	    map.editableDataEnabled = function(skipZoomCheck) {
+	    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 layer = context.layers().layer('osm');
-	        if (!layer || !layer.enabled()) { return false; }
+	    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
 
-	        return skipZoomCheck || map.withinEditableZoom();
-	    };
+	    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
 
+	    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
 
-	    map.notesEditable = function() {
-	        var layer = context.layers().layer('notes');
-	        if (!layer || !layer.enabled()) { return false; }
+	      autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature', {
+	        n: 1
+	      })];
+	    }
 
-	        return map.withinEditableZoom();
-	    };
+	    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')
+	                );
+	            }
+	        })
+	        */
+	        ];
+	      }
+	    })];
 
+	    function showReference(selection) {
+	      selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unsquare_way.buildings.reference'));
+	    }
+	  };
 
-	    map.minzoom = function(val) {
-	        if (!arguments.length) { return _minzoom; }
-	        _minzoom = val;
-	        return map;
-	    };
+	  validation.type = type;
+	  return validation;
+	}
 
+	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
+	});
 
-	    map.toggleHighlightEdited = function() {
-	        surface.classed('highlight-edited', !surface.classed('highlight-edited'));
-	        map.pan([0,0]);  // trigger a redraw
-	        dispatch$1.call('changeHighlighting', this);
-	    };
+	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 _baseCache = validationCache(); // issues before any user edits
 
-	    map.areaFillOptions = ['wireframe', 'partial', 'full'];
 
-	    map.activeAreaFill = function(val) {
-	        if (!arguments.length) { return corePreferences('area-fill') || 'partial'; }
+	  var _headCache = validationCache(); // issues after all user edits
 
-	        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;
-	    };
 
-	    map.toggleWireframe = function() {
+	  var _validatedGraph = null;
 
-	        var activeFill = map.activeAreaFill();
+	  var _deferred = new Set(); //
+	  // initialize the validator rulesets
+	  //
 
-	        if (activeFill === 'wireframe') {
-	            activeFill = corePreferences('area-fill-toggle') || 'partial';
-	        } else {
-	            activeFill = 'wireframe';
-	        }
 
-	        map.activeAreaFill(activeFill);
-	    };
+	  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');
 
-	    function updateAreaFill() {
-	        var activeFill = map.activeAreaFill();
-	        map.areaFillOptions.forEach(function(opt) {
-	            surface.classed('fill-' + opt, Boolean(opt === activeFill));
-	        });
+	    if (disabledRules) {
+	      disabledRules.split(',').forEach(function (key) {
+	        _disabledRules[key] = true;
+	      });
 	    }
+	  };
 
+	  function reset(resetIgnored) {
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
-	    map.layers = function () { return drawLayers; };
+	      _deferred["delete"](handle);
+	    }); // clear caches
 
+	    if (resetIgnored) _ignoredIssueIDs = {};
+	    _baseCache = validationCache();
+	    _headCache = validationCache();
+	    _validatedGraph = null;
+	  } //
+	  // clear caches, called whenever iD resets after a save
+	  //
 
-	    map.doubleUpHandler = function() {
-	        return _doubleUpHandler;
-	    };
 
+	  validator.reset = function () {
+	    reset(true);
+	  };
 
-	    return utilRebind(map, dispatch$1, 'on');
-	}
+	  validator.resetIgnoredIssues = function () {
+	    _ignoredIssueIDs = {}; // reload UI
 
-	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
+	    dispatch$1.call('validated');
+	  }; // must update issues when the user changes the unsquare thereshold
 
-	    function photos() {}
 
-	    function updateStorage() {
-	        if (window.mocha) { return; }
+	  validator.reloadUnsquareIssues = function () {
+	    reloadUnsquareIssues(_headCache, context.graph());
+	    reloadUnsquareIssues(_baseCache, context.history().base());
+	    dispatch$1.call('validated');
+	  };
 
-	        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 reloadUnsquareIssues(cache, graph) {
+	    var checkUnsquareWay = _rules.unsquare_way;
+	    if (typeof checkUnsquareWay !== 'function') return; // uncache existing
 
-	    photos.overlayLayerIDs = function() {
-	        return _layerIDs;
-	    };
+	    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
 
-	    photos.allPhotoTypes = function() {
-	        return _allPhotoTypes;
-	    };
+	    buildings.forEach(function (entity) {
+	      var detected = checkUnsquareWay(entity, graph);
+	      if (detected.length !== 1) return;
+	      var issue = detected[0];
 
-	    function showsLayer(id) {
-	        var layer = context.layers().layer(id);
-	        return layer && layer.supported() && layer.enabled();
-	    }
+	      if (!cache.issuesByEntityID[entity.id]) {
+	        cache.issuesByEntityID[entity.id] = new Set();
+	      }
 
-	    photos.shouldFilterByPhotoType = function() {
-	        return showsLayer('mapillary') ||
-	            (showsLayer('streetside') && showsLayer('openstreetcam'));
-	    };
+	      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;
+	        }
+	      }
 
-	    photos.showsPhotoType = function(val) {
-	        if (!photos.shouldFilterByPhotoType()) { return true; }
+	      if (opts.what === 'edited' && _baseCache.issuesByIssueID[issue.id]) return false;
 
-	        return _shownPhotoTypes.indexOf(val) !== -1;
-	    };
+	      if (opts.where === 'visible') {
+	        var extent = issue.extent(context.graph());
+	        if (!view.intersects(extent)) return false;
+	      }
 
-	    photos.showsFlat = function() {
-	        return photos.showsPhotoType('flat');
-	    };
+	      return true;
+	    });
+	  };
 
-	    photos.showsPanoramic = function() {
-	        return photos.showsPhotoType('panoramic');
-	    };
+	  validator.getResolvedIssues = function () {
+	    var baseIssues = Object.values(_baseCache.issuesByIssueID);
+	    return baseIssues.filter(function (issue) {
+	      return !_headCache.issuesByIssueID[issue.id];
+	    });
+	  };
 
-	    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;
-	    };
+	  validator.focusIssue = function (issue) {
+	    var extent = issue.extent(context.graph());
 
-	    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); }
-	            });
-	        }
+	    if (extent) {
+	      var setZoom = Math.max(context.map().zoom(), 19);
+	      context.map().unobscuredCenterZoomEase(extent.center(), setZoom); // select the first entity
 
-	        context.layers().on('change.rendererPhotos', updateStorage);
-	    };
+	      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
+	      }
+	    }
+	  };
 
-	    return utilRebind(photos, dispatch$1, 'on');
-	}
+	  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
 
-	function uiAccount(context) {
-	    var osm = context.connection();
 
+	  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
 
-	    function update(selection) {
-	        if (!osm) { return; }
+	  validator.getSharedEntityIssues = function (entityIDs, options) {
+	    var cache = _headCache; // gather the issues that are common to all the entities
 
-	        if (!osm.authenticated()) {
-	            selection.selectAll('.userLink, .logoutLink')
-	                .classed('hide', true);
-	            return;
-	        }
+	    var issueIDs = entityIDs.reduce(function (acc, entityID) {
+	      var entityIssueIDs = cache.issuesByEntityID[entityID] || new Set();
+
+	      if (!acc) {
+	        return new Set(entityIssueIDs);
+	      }
 
-	        osm.userDetails(function(err, details) {
-	            var userLink = selection.select('.userLink'),
-	                logoutLink = selection.select('.logoutLink');
+	      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;
+	      }
 
-	            userLink.html('');
-	            logoutLink.html('');
+	      var index1 = orderedIssueTypes.indexOf(issue1.type);
+	      var index2 = orderedIssueTypes.indexOf(issue2.type);
 
-	            if (err || !details) { return; }
+	      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;
+	      }
+	    });
+	  };
 
-	            selection.selectAll('.userLink, .logoutLink')
-	                .classed('hide', false);
+	  validator.getEntityIssues = function (entityID, options) {
+	    return validator.getSharedEntityIssues([entityID], options);
+	  };
 
-	            // Link
-	            userLink.append('a')
-	                .attr('href', osm.userURL(details.display_name))
-	                .attr('target', '_blank');
+	  validator.getRuleKeys = function () {
+	    return Object.keys(_rules);
+	  };
 
-	            // 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'));
-	            }
+	  validator.isRuleEnabled = function (key) {
+	    return !_disabledRules[key];
+	  };
 
-	            // 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();
-	                });
-	        });
+	  validator.toggleRule = function (key) {
+	    if (_disabledRules[key]) {
+	      delete _disabledRules[key];
+	    } else {
+	      _disabledRules[key] = true;
 	    }
 
+	    corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
+	    validator.validate();
+	  };
 
-	    return function(selection) {
-	        selection.append('li')
-	            .attr('class', 'logoutLink')
-	            .classed('hide', true);
+	  validator.disableRules = function (keys) {
+	    _disabledRules = {};
+	    keys.forEach(function (k) {
+	      _disabledRules[k] = true;
+	    });
+	    corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
+	    validator.validate();
+	  };
 
-	        selection.append('li')
-	            .attr('class', 'userLink')
-	            .classed('hide', true);
+	  validator.ignoreIssue = function (id) {
+	    _ignoredIssueIDs[id] = true;
+	  }; //
+	  // Run validation on a single entity for the given graph
+	  //
 
-	        if (osm) {
-	            osm.on('change.account', function() { update(selection); });
-	            update(selection);
-	        }
-	    };
-	}
 
-	function uiAttribution(context) {
-	  var _selection = select(null);
+	  function validateEntity(entity, graph) {
+	    var entityIssues = []; // runs validation and appends resulting issues
 
+	    function runValidation(key) {
+	      var fn = _rules[key];
 
-	  function render(selection, data, klass) {
-	    var div = selection.selectAll(("." + klass))
-	      .data([0]);
+	      if (typeof fn !== 'function') {
+	        console.error('no such validation rule = ' + key); // eslint-disable-line no-console
 
-	    div = div.enter()
-	      .append('div')
-	      .attr('class', klass)
-	      .merge(div);
+	        return;
+	      }
 
+	      var detected = fn(entity, graph);
+	      entityIssues = entityIssues.concat(detected);
+	    } // run all rules
 
-	    var attributions = div.selectAll('.attribution')
-	      .data(data, function (d) { return d.id; });
 
-	    attributions.exit()
-	      .remove();
+	    Object.keys(_rules).forEach(runValidation);
+	    return entityIssues;
+	  }
 
-	    attributions = attributions.enter()
-	      .append('span')
-	      .attr('class', 'attribution')
-	      .each(function (d, i, nodes) {
-	        var attribution = select(nodes[i]);
+	  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];
 
-	        if (d.terms_html) {
-	          attribution.html(d.terms_html);
-	          return;
-	        }
+	      if (entity.type === 'node') {
+	        graph.parentWays(entity).forEach(function (parentWay) {
+	          acc.add(parentWay.id); // include parent ways
 
-	        if (d.terms_url) {
-	          attribution = attribution
-	            .append('a')
-	            .attr('href', d.terms_url)
-	            .attr('target', '_blank');
-	        }
+	          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
 
-	        var sourceID = d.id.replace(/\./g, '<TX_DOT>');
-	        var terms_text = _t(("imagery." + sourceID + ".attribution.text"),
-	          { default: d.terms_text || d.id || d.name() }
-	        );
+	          graph._parentWays[nodeID].forEach(function (wayID) {
+	            acc.add(wayID); // include connected ways
+	          });
+	        });
+	      }
 
-	        if (d.icon && !d.overlay) {
-	          attribution
-	            .append('img')
-	            .attr('class', 'source-image')
-	            .attr('src', d.icon);
+	      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);
+	          });
 	        }
-
-	        attribution
-	          .append('span')
-	          .attr('class', 'attribution-text')
-	          .text(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] : [];
 	      });
+	      return acc;
+	    }, new Set());
+	  } //
+	  // Run validation for several entities, supplied `entityIDs`,
+	  // against `graph` for the given `cache`
+	  //
 
-	    copyright.exit()
-	      .remove();
 
-	    copyright = copyright.enter()
-	      .append('span')
-	      .attr('class', 'copyright-notice')
-	      .merge(copyright);
+	  function validateEntities(entityIDs, graph, cache) {
+	    // clear caches for existing issues related to these entities
+	    entityIDs.forEach(cache.uncacheEntityID); // detect new issues and update caches
 
-	    copyright
-	      .text(String);
-	  }
+	    entityIDs.forEach(function (entityID) {
+	      var entity = graph.hasEntity(entityID); // don't validate deleted entities
 
+	      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.
+	  //
 
-	  function update() {
-	    var baselayer = context.background().baseLayerSource();
-	    _selection
-	      .call(render, (baselayer ? [baselayer] : []), 'base-layer-attribution');
 
-	    var z = context.map().zoom();
-	    var overlays = context.background().overlayLayerSources() || [];
-	    _selection
-	      .call(render, overlays.filter(function (s) { return s.validZoom(z); }), 'overlay-layer-attribution');
-	  }
+	  validator.validate = function () {
+	    var currGraph = context.graph();
+	    _validatedGraph = _validatedGraph || context.history().base();
 
+	    if (currGraph === _validatedGraph) {
+	      dispatch$1.call('validated');
+	      return;
+	    }
 
-	  return function(selection) {
-	    _selection = selection;
+	    var oldGraph = _validatedGraph;
+	    var difference = coreDifference(oldGraph, currGraph);
+	    _validatedGraph = currGraph;
+	    var createdAndModifiedEntityIDs = difference.extantIDs(true); // created/modified (true = w/relation members)
 
-	    context.background()
-	      .on('change.attribution', update);
+	    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)
 
-	    context.map()
-	      .on('move.attribution', throttle(update, 400, { leading: false }));
+	    var modifiedAndDeletedEntityIDs = difference.deleted().concat(difference.modified()).map(function (entity) {
+	      return entity.id;
+	    });
+	    var entityIDsToCheckForOldGraph = entityIDsToValidate(modifiedAndDeletedEntityIDs, oldGraph); // concat the sets
 
-	    update();
+	    entityIDsToCheckForOldGraph.forEach(entityIDsToCheck.add, entityIDsToCheck);
+	    validateEntities(entityIDsToCheck, context.graph(), _headCache);
+	    dispatch$1.call('validated');
 	  };
-	}
 
-	function uiContributors(context) {
-	    var osm = context.connection(),
-	        debouncedUpdate = debounce(function() { update(); }, 1000),
-	        limit = 4,
-	        hidden = false,
-	        wrap = select(null);
+	  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:
 
-	    function update() {
-	        if (!osm) { return; }
+	  context.on('exit.validator', validator.validate); // When merging fetched data:
 
-	        var users = {},
-	            entities = context.history().intersects(context.map().extent());
+	  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');
+	    });
 
-	        entities.forEach(function(entity) {
-	            if (entity && entity.user) { users[entity.user] = true; }
-	        });
+	    _deferred.add(handle);
+	  });
+	  return validator;
+	}
 
-	        var u = Object.keys(users),
-	            subset = u.slice(0, u.length > limit ? limit - 1 : limit);
+	function validationCache() {
+	  var cache = {
+	    issuesByIssueID: {},
+	    // issue.id -> issue
+	    issuesByEntityID: {} // entity.id -> set(issue.id)
 
-	        wrap.html('')
-	            .call(svgIcon('#iD-icon-nearby', 'pre-text light'));
+	  };
 
-	        var userList = select(document.createElement('span'));
+	  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();
+	        }
 
-	        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);
+	        cache.issuesByEntityID[entityId].add(issue.id);
+	      });
+	      cache.issuesByIssueID[issue.id] = issue;
+	    });
+	  };
 
-	            wrap.append('span')
-	                .html(_t('contributors.truncated_list', { users: userList.html(), count: count.html() }));
+	  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];
+	  };
 
-	        } else {
-	            wrap.append('span')
-	                .html(_t('contributors.list', { users: userList.html() }));
-	        }
+	  cache.uncacheIssues = function (issues) {
+	    issues.forEach(cache.uncacheIssue);
+	  };
 
-	        if (!u.length) {
-	            hidden = true;
-	            wrap
-	                .transition()
-	                .style('opacity', 0);
+	  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
+	  //
 
-	        } else if (hidden) {
-	            wrap
-	                .transition()
-	                .style('opacity', 1);
-	        }
-	    }
 
+	  cache.uncacheEntityID = function (entityID) {
+	    var issueIDs = cache.issuesByEntityID[entityID];
+	    if (!issueIDs) return;
+	    issueIDs.forEach(function (issueID) {
+	      var issue = cache.issuesByIssueID[issueID];
 
-	    return function(selection) {
-	        if (!osm) { return; }
-	        wrap = selection;
-	        update();
+	      if (issue) {
+	        cache.uncacheIssue(issue);
+	      } else {
+	        delete cache.issuesByIssueID[issueID];
+	      }
+	    });
+	    delete cache.issuesByEntityID[entityID];
+	  };
 
-	        osm.on('loaded.contributors', debouncedUpdate);
-	        context.map().on('move.contributors', debouncedUpdate);
-	    };
+	  return cache;
 	}
 
-	var _popoverID = 0;
+	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 = [];
 
-	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;
-	        }
-	    };
+	  var _origChanges;
 
-	    popover.hasArrow = function(val) {
-	        if (arguments.length) {
-	            _hasArrow = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _hasArrow;
-	        }
-	    };
+	  var _discardTags = {};
+	  _mainFileFetcher.get('discarded').then(function (d) {
+	    _discardTags = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  });
+	  var uploader = utilRebind({}, dispatch$1, 'on');
 
-	    popover.placement = function(val) {
-	        if (arguments.length) {
-	            _placement = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _placement;
-	        }
-	    };
+	  uploader.isSaving = function () {
+	    return _isSaving;
+	  };
 
-	    popover.alignment = function(val) {
-	        if (arguments.length) {
-	            _alignment = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _alignment;
-	        }
-	    };
+	  uploader.save = function (changeset, tryAgain, checkConflicts) {
+	    // Guard against accidentally entering save code twice - #4641
+	    if (_isSaving && !tryAgain) {
+	      return;
+	    }
 
-	    popover.scrollContainer = function(val) {
-	        if (arguments.length) {
-	            _scrollContainer = utilFunctor(val);
-	            return popover;
-	        } else {
-	            return _scrollContainer;
-	        }
-	    };
+	    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.
 
-	    popover.content = function(val) {
-	        if (arguments.length) {
-	            _content = val;
-	            return popover;
-	        } else {
-	            return _content;
+	    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);
+	    }
+
+	    var history = context.history();
+	    _conflicts = [];
+	    _errors = []; // Store original changes, in case user wants to download them as an .osc file
+
+	    _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
 
-	    popover.isShown = function() {
-	        var popoverSelection = _anchorSelection.select('.popover-' + _id);
-	        return !popoverSelection.empty() && popoverSelection.classed('in');
-	    };
+	    if (!tryAgain) {
+	      history.perform(actionNoop());
+	    } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
 
-	    popover.show = function() {
-	        _anchorSelection.each(show);
-	    };
 
-	    popover.updateContent = function() {
-	        _anchorSelection.each(updateContent);
-	    };
+	    if (!checkConflicts) {
+	      upload(changeset); // Do the full (slow) conflict check..
+	    } else {
+	      performFullConflictCheck(changeset);
+	    }
+	  };
 
-	    popover.hide = function() {
-	        _anchorSelection.each(hide);
-	    };
+	  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 = [];
 
-	    popover.toggle = function() {
-	        _anchorSelection.each(toggle);
-	    };
+	    for (var i = 0; i < summary.length; i++) {
+	      var item = summary[i];
 
-	    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 (item.changeType === 'modified') {
+	        _toCheck.push(item.entity.id);
+	      }
+	    }
 
+	    var _toLoad = withChildNodes(_toCheck, localGraph);
 
-	    popover.destroyAny = function(selection) {
-	        selection.call(popover.destroy, '.popover');
-	    };
+	    var _loaded = {};
+	    var _toLoadCount = 0;
+	    var _toLoadTotal = _toLoad.length;
 
-	    function setup() {
-	        var anchor = select(this);
-	        var animate = _animation.apply(this, arguments);
-	        var popoverSelection = anchor.selectAll('.popover-' + _id)
-	            .data([0]);
+	    if (_toCheck.length) {
+	      dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
+	      _toLoad.forEach(function (id) {
+	        _loaded[id] = false;
+	      });
 
-	        var enter = popoverSelection.enter()
-	            .append('div')
-	            .attr('class', 'popover popover-' + _id + ' ' + (klass ? klass : ''))
-	            .classed('arrowed', _hasArrow.apply(this, arguments));
+	      osm.loadMultiple(_toLoad, loaded);
+	    } else {
+	      upload(changeset);
+	    }
 
-	        enter
-	            .append('div')
-	            .attr('class', 'popover-arrow');
+	    return;
 
-	        enter
-	            .append('div')
-	            .attr('class', 'popover-inner');
+	    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..
 
-	        popoverSelection = enter
-	            .merge(popoverSelection);
 
-	        if (animate) {
-	            popoverSelection.classed('fade', true);
-	        }
+	    function loaded(err, result) {
+	      if (_errors.length) return;
 
-	        var display = _displayType.apply(this, arguments);
+	      if (err) {
+	        _errors.push({
+	          msg: err.message || err.responseText,
+	          details: [_t('save.status_code', {
+	            code: err.status
+	          })]
+	        });
 
-	        if (display === 'hover') {
-	            var _lastNonMouseEnterTime;
-	            anchor.on(_pointerPrefix + 'enter.popover', function() {
+	        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..
 
-	                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;
-	                    }
-	                }
+	          var i, id;
 
-	                // don't show if buttons are pressed, e.g. during click and drag of map
-	                if (event.buttons !== 0) { return; }
+	          if (entity.type === 'way') {
+	            for (i = 0; i < entity.nodes.length; i++) {
+	              id = entity.nodes[i];
 
-	                show.apply(this, arguments);
-	            });
-	            anchor.on(_pointerPrefix + 'leave.popover', function() {
-	                hide.apply(this, arguments);
-	            });
+	              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;
 
-	        } 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 (_loaded[id] === undefined) {
+	                _loaded[id] = false;
+	                loadMore.push(id);
+	              }
+	            }
+	          }
+	        });
+	        _toLoadCount += result.data.length;
+	        _toLoadTotal += loadMore.length;
+	        dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-	            popoverSelection
-	                .attr('tabindex', 0)
-	                .on('blur.popover', function() {
-	                    anchor.each(function() {
-	                        hide.apply(this, arguments);
-	                    });
-	                });
+	        if (loadMore.length) {
+	          _toLoad.push.apply(_toLoad, loadMore);
+
+	          osm.loadMultiple(loadMore, loaded);
+	        }
+
+	        if (!_toLoad.length) {
+	          detectConflicts();
+	          upload(changeset);
 	        }
+	      }
 	    }
 
+	    function detectConflicts() {
+	      function choice(id, text, _action) {
+	        return {
+	          id: id,
+	          text: text,
+	          action: function action() {
+	            history.replace(_action);
+	          }
+	        };
+	      }
 
-	    function show() {
-	        var anchor = select(this);
-	        var popoverSelection = anchor.selectAll('.popover-' + _id);
+	      function formatUser(d) {
+	        return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
+	      }
 
-	        if (popoverSelection.empty()) {
-	            // popover was removed somehow, put it back
-	            anchor.call(popover.destroy);
-	            anchor.each(setup);
-	            popoverSelection = anchor.selectAll('.popover-' + _id);
-	        }
+	      function entityName(entity) {
+	        return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
+	      }
 
-	        popoverSelection.classed('in', true);
+	      function sameVersions(local, remote) {
+	        if (local.version !== remote.version) return false;
 
-	        var displayType = _displayType.apply(this, arguments);
-	        if (displayType === 'clickFocus') {
-	            anchor.classed('active', true);
-	            popoverSelection.node().focus();
+	        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;
+	          }
 	        }
 
-	        anchor.each(updateContent);
-	    }
+	        return true;
+	      }
 
-	    function updateContent() {
-	        var anchor = select(this);
+	      _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)]
+	        });
+	      });
+	    }
+	  }
 
-	        if (_content) {
-	            anchor.selectAll('.popover-' + _id + ' > .popover-inner')
-	                .call(_content.apply(this, arguments));
-	        }
+	  function upload(changeset) {
+	    var osm = context.connection();
 
-	        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);
+	    if (!osm) {
+	      _errors.push({
+	        msg: 'No OSM Service'
+	      });
 	    }
 
+	    if (_conflicts.length) {
+	      didResultInConflicts(changeset);
+	    } else if (_errors.length) {
+	      didResultInErrors();
+	    } else {
+	      var history = context.history();
+	      var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
 
-	    function updatePosition() {
+	      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();
+	      }
+	    }
+	  }
 
-	        var anchor = select(this);
-	        var popoverSelection = anchor.selectAll('.popover-' + _id);
+	  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
+	          })]
+	        });
 
-	        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;
+	        didResultInErrors();
+	      }
+	    } else {
+	      didResultInSuccess(changeset);
+	    }
+	  }
 
-	        var placement = _placement.apply(this, arguments);
-	        popoverSelection
-	            .classed('left', false)
-	            .classed('right', false)
-	            .classed('top', false)
-	            .classed('bottom', false)
-	            .classed(placement, true);
+	  function didResultInNoChanges() {
+	    dispatch$1.call('resultNoChanges', this);
+	    endSave();
+	    context.flush(); // reset iD
+	  }
 
-	        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;
+	  function didResultInErrors() {
+	    context.history().pop();
+	    dispatch$1.call('resultErrors', this, _errors);
+	    endSave();
+	  }
 
-	        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 didResultInConflicts(changeset) {
+	    _conflicts.sort(function (a, b) {
+	      return b.id.localeCompare(a.id);
+	    });
 
-	        if (position) {
+	    dispatch$1.call('resultConflicts', this, changeset, _conflicts, _origChanges);
+	    endSave();
+	  }
 
-	            if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+	  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
 
-	                var initialPosX = position.x;
+	    window.setTimeout(function () {
+	      endSave();
+	      context.flush(); // reset iD
+	    }, 2500);
+	  }
 
-	                if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
-	                    position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
-	                } else if (position.x < 10) {
-	                    position.x = 10;
-	                }
+	  function endSave() {
+	    _isSaving = false;
+	    dispatch$1.call('saveEnded', this);
+	  }
 
-	                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');
-	            }
+	  uploader.cancelConflictResolution = function () {
+	    context.history().pop();
+	  };
 
-	            popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
-	        } else {
-	            popoverSelection.style('left', null).style('top', null);
-	        }
+	  uploader.processResolvedConflicts = function (changeset) {
+	    var history = context.history();
 
-	        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
-	                };
-	            }
-	        }
-	    }
+	    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 hide() {
-	        var anchor = select(this);
-	        if (_displayType.apply(this, arguments) === 'clickFocus') {
-	            anchor.classed('active', false);
+	          for (var j = 0; j < children.length; j++) {
+	            history.replace(actionRevert(children[j]));
+	          }
 	        }
-	        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);
-	        }
+	        history.replace(actionRevert(_conflicts[i].id));
+	      }
 	    }
 
+	    uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
+	  };
 
-	    return popover;
-	}
+	  uploader.reset = function () {};
 
-	function uiTooltip(klass) {
+	  return uploader;
+	}
 
-	    var tooltip = uiPopover((klass || '') + ' tooltip')
-	        .displayType('hover');
+	var abs$4 = Math.abs;
+	var exp$2 = Math.exp;
+	var E = Math.E;
 
-	    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);
-	        }
-	        return title;
-	    };
+	var FORCED$g = fails(function () {
+	  return Math.sinh(-2e-17) != -2e-17;
+	});
 
-	    var _heading = utilFunctor(null);
-	    var _keys = utilFunctor(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);
+	  }
+	});
 
-	    tooltip.title = function(val) {
-	        if (!arguments.length) { return _title; }
-	        _title = utilFunctor(val);
-	        return tooltip;
-	    };
+	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
 
-	    tooltip.heading = function(val) {
-	        if (!arguments.length) { return _heading; }
-	        _heading = utilFunctor(val);
-	        return tooltip;
-	    };
+	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;
+	});
 
-	    tooltip.keys = function(val) {
-	        if (!arguments.length) { return _keys; }
-	        _keys = utilFunctor(val);
-	        return tooltip;
-	    };
+	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);
+	}
 
-	    tooltip.content(function() {
-	        var heading = _heading.apply(this, arguments);
-	        var text = _title.apply(this, arguments);
-	        var keys = _keys.apply(this, arguments);
+	function vintageRange(vintage) {
+	  var s;
 
-	        return function(selection) {
+	  if (vintage.start || vintage.end) {
+	    s = vintage.start || '?';
 
-	            var headingSelect = selection
-	                .selectAll('.tooltip-heading')
-	                .data(heading ? [heading] :[]);
+	    if (vintage.start !== vintage.end) {
+	      s += ' - ' + (vintage.end || '?');
+	    }
+	  }
 
-	            headingSelect.exit()
-	                .remove();
+	  return s;
+	}
 
-	            headingSelect.enter()
-	                .append('div')
-	                .attr('class', 'tooltip-heading')
-	                .merge(headingSelect)
-	                .html(heading);
+	function rendererBackgroundSource(data) {
+	  var source = Object.assign({}, data); // shallow copy
 
-	            var textSelect = selection
-	                .selectAll('.tooltip-text')
-	                .data(text ? [text] :[]);
+	  var _offset = [0, 0];
+	  var _name = source.name;
+	  var _description = source.description;
 
-	            textSelect.exit()
-	                .remove();
+	  var _best = !!source.best;
 
-	            textSelect.enter()
-	                .append('div')
-	                .attr('class', 'tooltip-text')
-	                .merge(textSelect)
-	                .html(text);
+	  var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
 
-	            var keyhintWrap = selection
-	                .selectAll('.keyhint-wrap')
-	                .data(keys && keys.length ? [0] : []);
+	  source.tileSize = data.tileSize || 256;
+	  source.zoomExtent = data.zoomExtent || [0, 22];
+	  source.overzoom = data.overzoom !== false;
 
-	            keyhintWrap.exit()
-	                .remove();
+	  source.offset = function (val) {
+	    if (!arguments.length) return _offset;
+	    _offset = val;
+	    return source;
+	  };
 
-	            var keyhintWrapEnter = keyhintWrap.enter()
-	                .append('div')
-	                .attr('class', 'keyhint-wrap');
+	  source.nudge = function (val, zoomlevel) {
+	    _offset[0] += val[0] / Math.pow(2, zoomlevel);
+	    _offset[1] += val[1] / Math.pow(2, zoomlevel);
+	    return source;
+	  };
 
-	            keyhintWrapEnter
-	                .append('span')
-	                .html(_t('tooltip_keyhint'));
+	  source.name = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t('imagery.' + id_safe + '.name', {
+	      "default": _name
+	    });
+	  };
 
-	            keyhintWrap = keyhintWrapEnter.merge(keyhintWrap);
+	  source.label = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t.html('imagery.' + id_safe + '.name', {
+	      "default": _name
+	    });
+	  };
 
-	            keyhintWrap.selectAll('kbd.shortcut')
-	                .data(keys && keys.length ? keys : [])
-	                .enter()
-	                .append('kbd')
-	                .attr('class', 'shortcut')
-	                .html(function(d) {
-	                    return d;
-	                });
-	        };
+	  source.description = function () {
+	    var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+	    return _t.html('imagery.' + id_safe + '.description', {
+	      "default": _description
 	    });
+	  };
 
-	    return tooltip;
-	}
+	  source.best = function () {
+	    return _best;
+	  };
 
-	function uiEditMenu(context) {
-	    var dispatch$1 = dispatch('toggled');
+	  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 _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 = '';
+	  source.imageryUsed = function () {
+	    return _name || source.id;
+	  };
 
-	    var _vpTopMargin = 85; // viewport top margin
-	    var _vpBottomMargin = 45; // viewport bottom margin
-	    var _vpSideMargin = 35;   // viewport side margin
+	  source.template = function (val) {
+	    if (!arguments.length) return _template;
 
-	    var _menuTop = false;
-	    var _menuHeight;
-	    var _menuWidth;
+	    if (source.id === 'custom') {
+	      _template = val;
+	    }
 
-	    // hardcode these values to make menu positioning easier
-	    var _verticalPadding = 4;
+	    return source;
+	  };
 
-	    // see also `.edit-menu .tooltip` CSS; include margin
-	    var _tooltipWidth = 210;
+	  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';
+	      }
+	    }
 
-	    // offset the menu slightly from the target location
-	    var _menuSideMargin = 10;
+	    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;
+	        };
 
-	    var _tooltips = [];
+	        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)));
 
-	    var editMenu = function(selection) {
+	        switch (source.projection) {
+	          case 'EPSG:4326':
+	            return {
+	              x: lon * 180 / Math.PI,
+	              y: lat * 180 / Math.PI
+	            };
 
-	        var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
+	          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]
+	            };
+	        }
+	      };
 
-	        var ops = _operations.filter(function(op) {
-	            return !isTouchMenu || !op.mouseOnly;
-	        });
+	      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;
+	            }
 
-	        if (!ops.length) { return; }
+	          case 'w':
+	            return minXmaxY.x;
 
-	        _tooltips = [];
+	          case 's':
+	            return maxXminY.y;
 
-	        // 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;
+	          case 'n':
+	            return maxXminY.x;
 
-	        // Show labels for touch input since there aren't hover tooltips
-	        var showLabels = isTouchMenu;
+	          case 'e':
+	            return minXmaxY.y;
 
-	        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;
+	          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..
 
-	        _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
 
-	        _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();
-	            });
+	    result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
+	      var subdomains = r.split(',');
+	      return subdomains[(coord[0] + coord[1]) % subdomains.length];
+	    });
+	    return result;
+	  };
 
-	        buttonsEnter.each(function(d) {
-	            var tooltip = uiTooltip()
-	                .heading(d.title)
-	                .title(d.tooltip())
-	                .keys([d.keys[0]]);
+	  source.validZoom = function (z) {
+	    return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
+	  };
 
-	            _tooltips.push(tooltip);
+	  source.isLocatorOverlay = function () {
+	    return source.id === 'mapbox_locator_overlay';
+	  };
+	  /* hides a source from the list, but leaves it available for use */
 
-	            select(this)
-	                .call(tooltip)
-	                .append('div')
-	                .attr('class', 'icon-wrap')
-	                .call(svgIcon('#iD-operation-' + d.id, 'operation'));
-	        });
 
-	        if (showLabels) {
-	            buttonsEnter.append('span')
-	                .attr('class', 'label')
-	                .text(function(d) {
-	                    return d.title;
-	                });
-	        }
+	  source.isHidden = function () {
+	    return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
+	  };
 
-	        // update
-	        buttons = buttonsEnter
-	            .merge(buttons)
-	            .classed('disabled', function(d) { return d.disabled(); });
+	  source.copyrightNotices = function () {};
 
-	        updatePosition();
+	  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);
+	  };
 
-	        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(); }
-	            });
+	  return source;
+	}
 
-	        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)();
-	                }
+	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
 
-	                operation();
-	                editMenu.close();
-	            }
-	            lastPointerUpType = null;
-	        }
+	  var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD
 
-	        dispatch$1.call('toggled', this, true);
-	    };
+	  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 */
+	  });
 
-	    function updatePosition() {
+	  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(', ');
+	  };
 
-	        if (!_menu || _menu.empty()) { return; }
+	  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 anchorLoc = context.projection(_anchorLocLonLat);
+	    var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
+	    if (inflight[tileID]) return;
 
-	        var viewport = context.surfaceRect();
+	    if (!cache[tileID]) {
+	      cache[tileID] = {};
+	    }
 
-	        if (anchorLoc[0] < 0 ||
-	            anchorLoc[0] > viewport.width ||
-	            anchorLoc[1] < 0 ||
-	            anchorLoc[1] > viewport.height) {
-	            // close the menu if it's gone offscreen
+	    if (cache[tileID] && cache[tileID].metadata) {
+	      return callback(null, cache[tileID].metadata);
+	    }
 
-	            editMenu.close();
-	            return;
-	        }
+	    inflight[tileID] = true;
+	    d3_json(url).then(function (result) {
+	      delete inflight[tileID];
 
-	        var menuLeft = displayOnLeft(viewport);
+	      if (!result) {
+	        throw new Error('Unknown Error');
+	      }
 
-	        var offset = [0, 0];
+	      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);
+	    });
+	  };
 
-	        offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
+	  bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+	  return bing;
+	};
 
-	        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;
-	            }
-	        }
+	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';
+	  }
 
-	        var origin = geoVecAdd(anchorLoc, offset);
+	  var esri = rendererBackgroundSource(data);
+	  var cache = {};
+	  var inflight = {};
 
-	        _menu
-	            .style('left', origin[0] + 'px')
-	            .style('top', origin[1] + 'px');
+	  var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
+	  // https://developers.arcgis.com/documentation/tiled-elevation-service/
 
-	        var tooltipSide = tooltipPosition(viewport, menuLeft);
-	        _tooltips.forEach(function(tooltip) {
-	            tooltip.placement(tooltipSide);
-	        });
 
-	        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;
+	  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
 
-	            } 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;
-	            }
-	        }
+	    var z = 20; // first generate a random url using the template
 
-	        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';
+	    var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map
 
-	            } 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';
-	            }
-	        }
-	    }
+	    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
 
-	    editMenu.close = function () {
+	    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
 
-	        context.map()
-	            .on('move.edit-menu', null)
-	            .on('drawn.edit-menu', null);
+	    d3_json(tilemapUrl).then(function (tilemap) {
+	      if (!tilemap) {
+	        throw new Error('Unknown Error');
+	      }
 
-	        _menu.remove();
-	        _tooltips = [];
+	      var hasTiles = true;
 
-	        dispatch$1.call('toggled', this, false);
-	    };
+	      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
 
-	    editMenu.anchorLoc = function(val) {
-	        if (!arguments.length) { return _anchorLoc; }
-	        _anchorLoc = val;
-	        _anchorLocLonLat = context.projection.invert(_anchorLoc);
-	        return editMenu;
-	    };
 
-	    editMenu.triggerType = function(val) {
-	        if (!arguments.length) { return _triggerType; }
-	        _triggerType = val;
-	        return editMenu;
-	    };
+	      esri.zoomExtent[1] = hasTiles ? 22 : 19;
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  };
 
-	    editMenu.operations = function(val) {
-	        if (!arguments.length) { return _operations; }
-	        _operations = val;
-	        return editMenu;
-	    };
+	  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)
 
-	    return utilRebind(editMenu, dispatch$1, 'on');
-	}
+	    var unknown = _t('info_panels.background.unknown');
+	    var metadataLayer;
+	    var vintage = {};
+	    var metadata = {};
+	    if (inflight[tileID]) return;
 
-	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);
+	    switch (true) {
+	      case zoom >= 20 && esri.id === 'EsriWorldImageryClarity':
+	        metadataLayer = 4;
+	        break;
 
-	        selection.html('');
+	      case zoom >= 19:
+	        metadataLayer = 3;
+	        break;
 
-	        if (hiddenList.length) {
-	            var tooltipBehavior = uiTooltip()
-	                .placement('top')
-	                .title(function() {
-	                    return hiddenList.join('<br/>');
-	                });
+	      case zoom >= 17:
+	        metadataLayer = 2;
+	        break;
 
-	            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'));
-	                });
-	        }
+	      case zoom >= 13:
+	        metadataLayer = 0;
+	        break;
 
-	        selection
-	            .classed('hide', !hiddenList.length);
+	      default:
+	        metadataLayer = 99;
 	    }
 
+	    var url; // build up query using the layer appropriate to the current zoom
 
-	    return function(selection) {
-	        update(selection);
+	    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/';
+	    }
 
-	        context.features().on('change.feature_info', function() {
-	            update(selection);
-	        });
-	    };
-	}
+	    url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
 
-	function uiFlash(context) {
-	    var _flashTimer;
+	    if (!cache[tileID]) {
+	      cache[tileID] = {};
+	    }
+
+	    if (cache[tileID] && cache[tileID].metadata) {
+	      return callback(null, cache[tileID].metadata);
+	    } // accurate metadata is only available >= 13
 
-	    var _duration = 2000;
-	    var _iconName = '#iD-icon-no';
-	    var _iconClass = 'disabled';
-	    var _text = '';
-	    var _textClass;
 
-	    function flash() {
-	        if (_flashTimer) {
-	            _flashTimer.stop();
+	    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';
 	        }
 
-	        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);
+	        if (isFinite(metadata.accuracy)) {
+	          metadata.accuracy += ' m';
+	        }
 
-	        var content = context.container().select('.flash-wrap').selectAll('.flash-content')
-	            .data([0]);
+	        cache[tileID].metadata = metadata;
+	        if (callback) callback(null, metadata);
+	      })["catch"](function (err) {
+	        delete inflight[tileID];
+	        if (callback) callback(err.message);
+	      });
+	    }
 
-	        // Enter
-	        var contentEnter = content.enter()
-	            .append('div')
-	            .attr('class', 'flash-content');
+	    function clean(val) {
+	      return String(val).trim() || unknown;
+	    }
+	  };
 
-	        var iconEnter = contentEnter
-	            .append('svg')
-	            .attr('class', 'flash-icon icon')
-	            .append('g')
-	            .attr('transform', 'translate(10,10)');
+	  return esri;
+	};
 
-	        iconEnter
-	            .append('circle')
-	            .attr('r', 9);
+	rendererBackgroundSource.None = function () {
+	  var source = rendererBackgroundSource({
+	    id: 'none',
+	    template: ''
+	  });
 
-	        iconEnter
-	            .append('use')
-	            .attr('transform', 'translate(-7,-7)')
-	            .attr('width', '14')
-	            .attr('height', '14');
+	  source.name = function () {
+	    return _t('background.none');
+	  };
 
-	        contentEnter
-	            .append('div')
-	            .attr('class', 'flash-text');
+	  source.label = function () {
+	    return _t.html('background.none');
+	  };
 
+	  source.imageryUsed = function () {
+	    return null;
+	  };
 
-	        // Update
-	        content = content
-	            .merge(contentEnter);
+	  source.area = function () {
+	    return -1; // sources in background pane are sorted by area
+	  };
 
-	        content
-	            .selectAll('.flash-icon')
-	            .attr('class', 'icon flash-icon ' + (_iconClass || ''));
+	  return source;
+	};
 
-	        content
-	            .selectAll('.flash-icon use')
-	            .attr('xlink:href', _iconName);
+	rendererBackgroundSource.Custom = function (template) {
+	  var source = rendererBackgroundSource({
+	    id: 'custom',
+	    template: template
+	  });
 
-	        content
-	            .selectAll('.flash-text')
-	            .attr('class', 'flash-text ' + (_textClass || ''))
-	            .text(_text);
+	  source.name = function () {
+	    return _t('background.custom');
+	  };
 
+	  source.label = function () {
+	    return _t.html('background.custom');
+	  };
 
-	        _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);
+	  source.imageryUsed = function () {
+	    // sanitize personal connection tokens - #6801
+	    var cleaned = source.template(); // from query string parameters
 
-	        return content;
-	    }
+	    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
 
 
-	    flash.duration = function(_) {
-	        if (!arguments.length) { return _duration; }
-	        _duration = _;
-	        return flash;
-	    };
+	    cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+	    return 'Custom (' + cleaned + ' )';
+	  };
 
-	    flash.text = function(_) {
-	        if (!arguments.length) { return _text; }
-	        _text = _;
-	        return flash;
-	    };
+	  source.area = function () {
+	    return -2; // sources in background pane are sorted by area
+	  };
 
-	    flash.textClass = function(_) {
-	        if (!arguments.length) { return _textClass; }
-	        _textClass = _;
-	        return flash;
-	    };
+	  return source;
+	};
 
-	    flash.iconName = function(_) {
-	        if (!arguments.length) { return _iconName; }
-	        _iconName = _;
-	        return flash;
-	    };
+	function rendererTileLayer(context) {
+	  var transformProp = utilPrefixCSSProperty('Transform');
+	  var tiler = utilTiler();
+	  var _tileSize = 256;
 
-	    flash.iconClass = function(_) {
-	        if (!arguments.length) { return _iconClass; }
-	        _iconClass = _;
-	        return flash;
-	    };
+	  var _projection;
 
-	    return flash;
-	}
+	  var _cache = {};
 
-	function uiFullScreen(context) {
-	    var element = context.container().node();
-	    // var button = d3_select(null);
+	  var _tileOrigin;
 
+	  var _zoom;
 
-	    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;
-	        }
-	    }
+	  var _source;
 
+	  function tileSizeAtZoom(d, z) {
+	    var EPSILON = 0.002; // close seams
 
-	    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;
-	        }
-	    }
+	    return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
+	  }
+
+	  function atZoom(t, distance) {
+	    var power = Math.pow(2, distance);
+	    return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
+	  }
 
+	  function lookUp(d) {
+	    for (var up = -1; up > -d[2]; up--) {
+	      var tile = atZoom(d, up);
 
-	    function isFullScreen() {
-	        return document.fullscreenElement ||
-	            document.mozFullScreenElement ||
-	            document.webkitFullscreenElement ||
-	            document.msFullscreenElement;
+	      if (_cache[_source.url(tile)] !== false) {
+	        return tile;
+	      }
 	    }
+	  }
 
+	  function uniqueBy(a, n) {
+	    var o = [];
+	    var seen = {};
 
-	    function isSupported() {
-	        return !!getFullScreenFn();
+	    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;
+	  }
 
-	    function fullScreen() {
-	        event.preventDefault();
-	        if (!isFullScreen()) {
-	            // button.classed('active', true);
-	            getFullScreenFn().apply(element);
-	        } else {
-	            // button.classed('active', false);
-	            getExitFullScreenFn().apply(document);
-	        }
-	    }
+	  function addSource(d) {
+	    d.push(_source.url(d));
+	    return d;
+	  } // Update tiles based on current state of `projection`.
 
 
-	    return function() { // selection) {
-	        if (!isSupported()) { return; }
+	  function background(selection) {
+	    _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+	    var pixelOffset;
 
-	        // button = selection.append('button')
-	        //     .attr('title', t('full_screen'))
-	        //     .attr('tabindex', -1)
-	        //     .on('click', fullScreen)
-	        //     .call(tooltip);
+	    if (_source) {
+	      pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
+	    } else {
+	      pixelOffset = [0, 0];
+	    }
 
-	        // button.append('span')
-	        //     .attr('class', 'icon full-screen');
+	    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).
 
-	        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);
+	  function render(selection) {
+	    if (!_source) return;
+	    var requests = [];
+	    var showDebug = context.getDebug('tile') && !_source.overlay;
 
-	    function click() {
-	        if (context.inIntro()) { return; }
-	        if (!_layer.enabled() && !_locating.isShown()) {
+	    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
 
-	            // This timeout ensures that we still call finish() even if
-	            // the user declines to share their location in Firefox
-	            _timeoutID = setTimeout(error, 10000 /* 10sec */ );
+	        requests.push(d);
 
-	            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 (_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 zoomTo() {
-	        context.enter(modeBrowse(context));
-
-	        var map = context.map();
-	        _layer.enabled(_position, true);
-	        updateButtonState();
-	        map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
+	    function load(d3_event, d) {
+	      _cache[d[3]] = true;
+	      select(this).on('error', null).on('load', null).classed('tile-loaded', true);
+	      render(selection);
 	    }
 
-	    function success(geolocation) {
-	        _position = geolocation;
-	        var coords = _position.coords;
-	        _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
-	        zoomTo();
-	        finish();
+	    function error(d3_event, d) {
+	      _cache[d[3]] = false;
+	      select(this).on('error', null).on('load', null).remove();
+	      render(selection);
 	    }
 
-	    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')();
-	        }
+	    function imageTransform(d) {
+	      var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
-	        finish();
+	      var scale = tileSizeAtZoom(d, _zoom);
+	      return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
 	    }
 
-	    function finish() {
-	        _locating.close();  // unblock ui
-	        if (_timeoutID) { clearTimeout(_timeoutID); }
-	        _timeoutID = undefined;
+	    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];
 	    }
 
-	    function updateButtonState() {
-	        _button.classed('active', _layer.enabled());
+	    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)
+
+
+	    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);
+
+	      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));
+
+	        _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;
+	  };
 
-	    return function(selection) {
-	        if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) { return; }
+	  background.dimensions = function (val) {
+	    if (!arguments.length) return tiler.size();
+	    tiler.size(val);
+	    return background;
+	  };
 
-	        _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')])
-	            );
+	  background.source = function (val) {
+	    if (!arguments.length) return _source;
+	    _source = val;
+	    _tileSize = _source.tileSize;
+	    _cache = {};
+	    tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
+	    return background;
+	  };
 
-	        context.keybinding().on(_t('geolocate.key'), click);
-	    };
+	  return background;
 	}
 
-	function uiPanelBackground(context) {
-	    var background = context.background();
-	    var currSourceName = null;
-	    var metadata = {};
-	    var metadataKeys = [
-	        'zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'
-	    ];
+	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 debouncedRedraw = debounce(redraw, 250);
+	  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'
 
-	    function redraw(selection) {
-	        var source = background.baseLayerSource();
-	        if (!source) { return; }
+	      _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'
 
-	        var isDG = (source.id.match(/^DigitalGlobe/i) !== null);
 
-	        if (currSourceName !== source.name()) {
-	            currSourceName = source.name();
-	            metadata = {};
-	        }
+	      var template = corePreferences('background-custom-template') || '';
+	      var custom = rendererBackgroundSource.Custom(template);
 
-	        selection.html('');
+	      _imageryIndex.backgrounds.unshift(custom);
 
-	        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]);
-	        });
+	      return _imageryIndex;
+	    });
+	  }
 
-	        debouncedGetMetadata(selection);
+	  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
 
-	        var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
+	    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
 
-	        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 (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);
-	                });
-	        }
+	    var sources = background.sources(context.map().extent());
+	    var wasValid = _isValid;
+	    _isValid = !!sources.filter(function (d) {
+	      return d === currSource;
+	    }).length;
 
-	        // 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);
-	                }
-	            }
-	        });
+	    if (wasValid !== _isValid) {
+	      // change in valid status
+	      background.updateImagery();
 	    }
 
+	    var baseFilter = '';
 
-	    var debouncedGetMetadata = debounce(getMetadata, 250);
+	    if (detected.cssfilters) {
+	      if (_brightness !== 1) {
+	        baseFilter += " brightness(".concat(_brightness, ")");
+	      }
 
-	    function getMetadata(selection) {
-	        var tile = context.container().select('.layer-background img.tile-center');   // tile near viewport center
-	        if (tile.empty()) { return; }
+	      if (_contrast !== 1) {
+	        baseFilter += " contrast(".concat(_contrast, ")");
+	      }
 
-	        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 (_saturation !== 1) {
+	        baseFilter += " saturate(".concat(_saturation, ")");
+	      }
 
-	        // 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);
-	            });
-	        });
+	      if (_sharpness < 1) {
+	        // gaussian blur
+	        var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
+	        baseFilter += " blur(".concat(blur, "px)");
+	      }
 	    }
 
+	    var base = selection.selectAll('.layer-background').data([0]);
+	    base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);
 
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	    if (detected.cssfilters) {
+	      base.style('filter', baseFilter || null);
+	    } else {
+	      base.style('opacity', _brightness);
+	    }
 
-	        context.map()
-	            .on('drawn.info-background', function() {
-	                selection.call(debouncedRedraw);
-	            })
-	            .on('move.info-background', function() {
-	                selection.call(debouncedGetMetadata);
-	            });
+	    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 = '';
 
-	    };
+	    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, ")");
+	    }
 
-	    panel.off = function() {
-	        context.map()
-	            .on('drawn.info-background', null)
-	            .on('move.info-background', null);
-	    };
+	    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);
+	    });
+	  }
 
-	    panel.id = 'background';
-	    panel.title = _t('info_panels.background.title');
-	    panel.key = _t('info_panels.background.key');
+	  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(',');
 
-	    return panel;
-	}
+	    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;
 
-	function uiPanelHistory(context) {
-	    var osm;
+	    if (id === 'custom') {
+	      id = "custom:".concat(currSource.template());
+	    }
 
-	    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);
+	    if (id) {
+	      hash.background = id;
+	    } else {
+	      delete hash.background;
 	    }
 
+	    if (o) {
+	      hash.overlays = o;
+	    } else {
+	      delete hash.overlays;
+	    }
 
-	    function displayUser(selection, userName) {
-	        if (!userName) {
-	            selection
-	                .append('span')
-	                .text(_t('info_panels.history.unknown'));
-	            return;
-	        }
+	    if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
+	      hash.offset = "".concat(x, ",").concat(y);
+	    } else {
+	      delete hash.offset;
+	    }
 
-	        selection
-	            .append('span')
-	            .attr('class', 'user-name')
-	            .text(userName);
+	    if (!window.mocha) {
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
 
-	        var links = selection
-	            .append('div')
-	            .attr('class', 'links');
+	    var imageryUsed = [];
+	    var photoOverlaysUsed = [];
+	    var currUsed = currSource.imageryUsed();
 
-	        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;
-	        }
+	    if (currUsed && _isValid) {
+	      imageryUsed.push(currUsed);
+	    }
 
-	        selection
-	            .append('span')
-	            .attr('class', 'changeset-id')
-	            .text(changeset);
+	    _overlayLayers.filter(function (d) {
+	      return !d.source().isLocatorOverlay() && !d.source().isHidden();
+	    }).forEach(function (d) {
+	      return imageryUsed.push(d.source().imageryUsed());
+	    });
 
-	        var links = selection
-	            .append('div')
-	            .attr('class', 'links');
+	    var dataLayer = context.layers().layer('data');
 
-	        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]);
-	            }
-	        }
+	    if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
+	      imageryUsed.push(dataLayer.getSrc());
+	    }
+
+	    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);
+
+	      if (layer && layer.enabled()) {
+	        photoOverlaysUsed.push(layerID);
+	        imageryUsed.push(photoOverlayLayers[layerID]);
+	      }
+	    }
+
+	    context.history().imageryUsed(imageryUsed);
+	    context.history().photoOverlaysUsed(photoOverlaysUsed);
+	  };
 
-	        var singular = selected.length === 1 ? selected[0] : null;
+	  var _checkedBlocklists;
 
-	        selection.html('');
+	  background.sources = function (extent, zoom, includeCurrent) {
+	    if (!_imageryIndex) return []; // called before init()?
 
-	        selection
-	            .append('h4')
-	            .attr('class', 'history-heading')
-	            .text(singular || _t('info_panels.history.selected', { n: selected.length }));
+	    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 (!singular) { return; }
+	    if (blocklists && blocklists !== _checkedBlocklists) {
+	      _imageryIndex.backgrounds.forEach(function (source) {
+	        source.isBlocked = blocklists.some(function (blocklist) {
+	          return blocklist.test(source.template());
+	        });
+	      });
 
-	        if (entity) {
-	            selection.call(redrawEntity, entity);
-	        } else if (note) {
-	            selection.call(redrawNote, note);
-	        }
+	      _checkedBlocklists = blocklists;
 	    }
 
+	    return _imageryIndex.backgrounds.filter(function (source) {
+	      if (includeCurrent && currSource === source) return true; // optionally always include the current imagery
 
-	    function redrawNote(selection, note) {
-	        if (!note || note.isNew()) {
-	            selection
-	                .append('div')
-	                .text(_t('info_panels.history.note_no_history'));
-	            return;
-	        }
-
-	        var list = selection
-	            .append('ul');
+	      if (source.isBlocked) return false; // even bundled sources may be blocked - #7905
 
-	        list
-	            .append('li')
-	            .text(_t('info_panels.history.note_comments') + ':')
-	            .append('span')
-	            .text(note.comments.length);
+	      if (!source.polygon) return true; // always include imagery with worldwide coverage
 
-	        if (note.comments.length) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.history.note_created_date') + ':')
-	                .append('span')
-	                .text(displayTimestamp(note.comments[0].date));
+	      if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms
 
-	            list
-	                .append('li')
-	                .text(_t('info_panels.history.note_created_user') + ':')
-	                .call(displayUser, note.comments[0].user);
-	        }
+	      return visible[source.id]; // include imagery visible in given extent
+	    });
+	  };
 
-	        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'));
-	        }
-	    }
+	  background.dimensions = function (val) {
+	    if (!val) return;
+	    baseLayer.dimensions(val);
 
+	    _overlayLayers.forEach(function (layer) {
+	      return layer.dimensions(val);
+	    });
+	  };
 
-	    function redrawEntity(selection, entity) {
-	        if (!entity || entity.isNew()) {
-	            selection
-	                .append('div')
-	                .text(_t('info_panels.history.no_history'));
-	            return;
-	        }
+	  background.baseLayerSource = function (d) {
+	    if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..
 
-	        var links = selection
-	            .append('div')
-	            .attr('class', 'links');
+	    var osm = context.connection();
+	    if (!osm) return background;
+	    var blocklists = osm.imageryBlocklists();
+	    var template = d.template();
+	    var fail = false;
+	    var tested = 0;
+	    var regex;
 
-	        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);
+	    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.
 
-	        context.map()
-	            .on('drawn.info-history', function() {
-	                selection.call(redraw);
-	            });
 
-	        context
-	            .on('enter.info-history', function() {
-	                selection.call(redraw);
-	            });
-	    };
+	    if (!tested) {
+	      regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+	      fail = regex.test(template);
+	    }
 
-	    panel.off = function() {
-	        context.map().on('drawn.info-history', null);
-	        context.on('enter.info-history', null);
-	    };
+	    baseLayer.source(!fail ? d : background.findSource('none'));
+	    dispatch$1.call('change');
+	    background.updateImagery();
+	    return background;
+	  };
 
-	    panel.id = 'history';
-	    panel.title = _t('info_panels.history.title');
-	    panel.key = _t('info_panels.history.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;
+	    });
+	  };
 
-	    return panel;
-	}
+	  background.bing = function () {
+	    background.baseLayerSource(background.findSource('Bing'));
+	  };
 
-	var OSM_PRECISION = 7;
+	  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;
+	    });
+	  };
 
-	/**
-	 * 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;
+	  background.overlayLayerSources = function () {
+	    return _overlayLayers.map(function (layer) {
+	      return layer.source();
+	    });
+	  };
 
-	    if (isImperial) {
-	        if (d >= 5280) {
-	            d /= 5280;
-	            unit = 'miles';
-	        } else {
-	            unit = 'feet';
-	        }
-	    } else {
-	        if (d >= 1000) {
-	            d /= 1000;
-	            unit = 'kilometers';
-	        } else {
-	            unit = 'meters';
-	        }
-	    }
+	  background.toggleOverlayLayer = function (d) {
+	    var layer;
 
-	    return _t('units.' + unit, {
-	        quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
-	            maximumSignificantDigits: 4
-	        })
-	    });
-	}
+	    for (var i = 0; i < _overlayLayers.length; i++) {
+	      layer = _overlayLayers[i];
 
-	/**
-	 * 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 = '';
+	      if (layer.source() === d) {
+	        _overlayLayers.splice(i, 1);
 
-	    if (isImperial) {
-	        if (d >= 6969600) { // > 0.25mi² show mi²
-	            d1 = d / 27878400;
-	            unit1 = 'square_miles';
-	        } else {
-	            d1 = d;
-	            unit1 = 'square_feet';
-	        }
+	        dispatch$1.call('change');
+	        background.updateImagery();
+	        return;
+	      }
+	    }
 
-	        if (d > 4356 && d < 43560000) { // 0.1 - 1000 acres
-	            d2 = d / 43560;
-	            unit2 = 'acres';
-	        }
+	    layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());
 
-	    } else {
-	        if (d >= 250000) { // > 0.25km² show km²
-	            d1 = d / 1000000;
-	            unit1 = 'square_kilometers';
-	        } else {
-	            d1 = d;
-	            unit1 = 'square_meters';
-	        }
+	    _overlayLayers.push(layer);
 
-	        if (d > 1000 && d < 10000000) { // 0.1 - 1000 hectares
-	            d2 = d / 10000;
-	            unit2 = 'hectares';
-	        }
-	    }
+	    dispatch$1.call('change');
+	    background.updateImagery();
+	  };
 
-	    area = _t('units.' + unit1, {
-	        quantity: d1.toLocaleString(locale, {
-	            maximumSignificantDigits: 4
-	        })
-	    });
+	  background.nudge = function (d, zoom) {
+	    var currSource = baseLayer.source();
 
-	    if (d2) {
-	        return _t('units.area_pair', {
-	            area1: area,
-	            area2: _t('units.' + unit2, {
-	                quantity: d2.toLocaleString(locale, {
-	                    maximumSignificantDigits: 2
-	                })
-	            })
-	        });
-	    } else {
-	        return area;
+	    if (currSource) {
+	      currSource.nudge(d, zoom);
+	      dispatch$1.call('change');
+	      background.updateImagery();
 	    }
-	}
 
-	function wrap(x, min, max) {
-	    var d = max - min;
-	    return ((x - min) % d + d) % d + min;
-	}
+	    return background;
+	  };
 
-	function clamp$1(x, min, max) {
-	    return Math.max(min, Math.min(x, max));
-	}
+	  background.offset = function (d) {
+	    var currSource = baseLayer.source();
 
-	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)
-	        });
+	    if (!arguments.length) {
+	      return currSource && currSource.offset() || [0, 0];
 	    }
 
-	    if (deg === 0) {
-	        return displayCoordinate;
-	    } else {
-	        return _t('units.coordinate', {
-	            coordinate: displayCoordinate,
-	            direction: _t('units.' + (deg > 0 ? pos : neg))
-	        });
+	    if (currSource) {
+	      currSource.offset(d);
+	      dispatch$1.call('change');
+	      background.updateImagery();
 	    }
-	}
 
-	/**
-	 * 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')
-	    });
-	}
+	    return background;
+	  };
 
-	/**
-	 * 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)
-	    });
-	}
+	  background.brightness = function (d) {
+	    if (!arguments.length) return _brightness;
+	    _brightness = d;
+	    if (context.mode()) dispatch$1.call('change');
+	    return background;
+	  };
 
-	function uiPanelLocation(context) {
-	    var currLocation = '';
+	  background.contrast = function (d) {
+	    if (!arguments.length) return _contrast;
+	    _contrast = d;
+	    if (context.mode()) dispatch$1.call('change');
+	    return background;
+	  };
 
+	  background.saturation = function (d) {
+	    if (!arguments.length) return _saturation;
+	    _saturation = d;
+	    if (context.mode()) dispatch$1.call('change');
+	    return background;
+	  };
 
-	    function redraw(selection) {
-	        selection.html('');
+	  background.sharpness = function (d) {
+	    if (!arguments.length) return _sharpness;
+	    _sharpness = d;
+	    if (context.mode()) dispatch$1.call('change');
+	    return background;
+	  };
 
-	        var list = selection
-	            .append('ul');
+	  var _loadPromise;
 
-	        // Mouse coordinates
-	        var coord = context.map().mouseCoordinates();
-	        if (coord.some(isNaN)) {
-	            coord = context.map().center();
-	        }
+	  background.ensureLoaded = function () {
+	    if (_loadPromise) return _loadPromise;
 
-	        list
-	            .append('li')
-	            .text(dmsCoordinatePair(coord))
-	            .append('li')
-	            .text(decimalCoordinatePair(coord));
+	    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
+	    }
 
-	        // Location Info
-	        selection
-	            .append('div')
-	            .attr('class', 'location-info')
-	            .text(currLocation || ' ');
+	    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;
 
-	        debouncedGetLocation(selection, coord);
-	    }
+	      if (!requested && extent) {
+	        best = background.sources(extent).find(function (s) {
+	          return s.best();
+	        });
+	      } // Decide which background layer to display
 
 
-	    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 (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'));
+	      }
 
+	      var locator = imageryIndex.backgrounds.find(function (d) {
+	        return d.overlay && d["default"];
+	      });
 
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	      if (locator) {
+	        background.toggleOverlayLayer(locator);
+	      }
 
-	        context.surface()
-	            .on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function() {
-	                selection.call(redraw);
-	            });
-	    };
+	      var overlays = (hash.overlays || '').split(',');
+	      overlays.forEach(function (overlay) {
+	        overlay = background.findSource(overlay);
 
-	    panel.off = function() {
-	        context.surface()
-	            .on('.info-location', null);
-	    };
+	        if (overlay) {
+	          background.toggleOverlayLayer(overlay);
+	        }
+	      });
 
-	    panel.id = 'location';
-	    panel.title = _t('info_panels.location.title');
-	    panel.key = _t('info_panels.location.key');
+	      if (hash.gpx) {
+	        var gpx = context.layers().layer('data');
 
+	        if (gpx) {
+	          gpx.url(hash.gpx, '.gpx');
+	        }
+	      }
 
-	    return panel;
-	}
+	      if (hash.offset) {
+	        var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
+	          return !isNaN(n) && n;
+	        });
 
-	function uiPanelMeasurement(context) {
-	    var locale = _mainLocalizer.localeCode();
-	    var isImperial = !_mainLocalizer.usesMetric();
+	        if (offset.length === 2) {
+	          background.offset(geoMetersToOffset(offset));
+	        }
+	      }
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  };
 
+	  return utilRebind(background, dispatch$1, 'on');
+	}
 
-	    function radiansToMeters(r) {
-	        // using WGS84 authalic radius (6371007.1809 m)
-	        return r * 6371007.1809;
-	    }
+	function rendererFeatures(context) {
+	  var dispatch$1 = dispatch('change', 'redraw');
+	  var features = utilRebind({}, dispatch$1, 'on');
 
-	    function steradiansToSqmeters(r) {
-	        // http://gis.stackexchange.com/a/124857/40446
-	        return r / (4 * Math.PI) * 510065621724000;
-	    }
+	  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
+	  };
+	  var _cullFactor = 1;
+	  var _cache = {};
+	  var _rules = {};
+	  var _stats = {};
+	  var _keys = [];
+	  var _hidden = [];
+	  var _forceVisible = {};
 
-	    function toLineString(feature) {
-	        if (feature.type === 'LineString') { return feature; }
+	  function update() {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
+	      var disabled = features.disabled();
 
-	        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];
-	        }
+	      if (disabled.length) {
+	        hash.disable_features = disabled.join(',');
+	      } else {
+	        delete hash.disable_features;
+	      }
 
-	        return result;
+	      window.location.replace('#' + utilQsString(hash, true));
+	      corePreferences('disabled-features', disabled.join(','));
 	    }
 
+	    _hidden = features.hidden();
+	    dispatch$1.call('change');
+	    dispatch$1.call('redraw');
+	  }
 
-	    function redraw(selection) {
-	        var graph = context.graph();
-	        var selectedNoteID = context.selectedNoteID();
-	        var osm = services.osm;
-
-	        var heading;
-	        var center, location, centroid;
-	        var closed, geometry;
-	        var totalNodeCount, length = 0, area = 0;
+	  function defineRule(k, filter, max) {
+	    var isEnabled = true;
 
-	        if (selectedNoteID && osm) {       // selected 1 note
+	    _keys.push(k);
 
-	            var note = osm.getNote(selectedNoteID);
-	            heading = _t('note.note') + ' ' + selectedNoteID;
-	            location = note.loc;
-	            geometry = 'note';
+	    _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;
+	      }
+	    };
+	  }
 
-	        } 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);
-	            });
+	  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..
 
-	            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));
-	                        }
-	                    }
-	                }
+	  defineRule('past_future', function isPastFuture(tags) {
+	    if (traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]) {
+	      return false;
+	    }
 
-	                if (selected.length > 1) {
-	                    geometry = null;
-	                    closed = null;
-	                    centroid = null;
-	                }
+	    var strings = Object.keys(tags);
 
-	                if (selected.length === 1 && selected[0].type === 'node') {
-	                    location = selected[0].loc;
-	                } else {
-	                    totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
-	                }
+	    for (var i = 0; i < strings.length; i++) {
+	      var s = strings[i];
 
-	                if (!location && !centroid) {
-	                    center = extent.center();
-	                }
-	            }
-	        }
+	      if (past_futures[s] || past_futures[tags[s]]) {
+	        return true;
+	      }
+	    }
 
-	        selection.html('');
+	    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`
 
-	        if (heading) {
-	            selection
-	                .append('h4')
-	                .attr('class', 'measurement-heading')
-	                .text(heading);
-	        }
+	  defineRule('others', function isOther(tags, geometry) {
+	    return geometry === 'line' || geometry === 'area';
+	  });
 
-	        var list = selection
-	            .append('ul');
-	        var coordItem;
+	  features.features = function () {
+	    return _rules;
+	  };
 
-	        if (geometry) {
-	            list
-	                .append('li')
-	                .text(_t('info_panels.measurement.geometry') + ':')
-	                .append('span')
-	                .text(
-	                    closed ? _t('info_panels.measurement.closed_' + geometry) : _t('geometry.' + geometry)
-	                );
-	        }
+	  features.keys = function () {
+	    return _keys;
+	  };
 
-	        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);
-	                });
-	        }
+	  features.enabled = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].enabled;
+	      });
 	    }
 
+	    return _rules[k] && _rules[k].enabled;
+	  };
 
-	    var panel = function(selection) {
-	        selection.call(redraw);
+	  features.disabled = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return !_rules[k].enabled;
+	      });
+	    }
 
-	        context.map()
-	            .on('drawn.info-measurement', function() {
-	                selection.call(redraw);
-	            });
+	    return _rules[k] && !_rules[k].enabled;
+	  };
 
-	        context
-	            .on('enter.info-measurement', function() {
-	                selection.call(redraw);
-	            });
-	    };
+	  features.hidden = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].hidden();
+	      });
+	    }
 
-	    panel.off = function() {
-	        context.map().on('drawn.info-measurement', null);
-	        context.on('enter.info-measurement', null);
-	    };
+	    return _rules[k] && _rules[k].hidden();
+	  };
 
-	    panel.id = 'measurement';
-	    panel.title = _t('info_panels.measurement.title');
-	    panel.key = _t('info_panels.measurement.key');
+	  features.autoHidden = function (k) {
+	    if (!arguments.length) {
+	      return _keys.filter(function (k) {
+	        return _rules[k].autoHidden();
+	      });
+	    }
 
+	    return _rules[k] && _rules[k].autoHidden();
+	  };
 
-	    return panel;
-	}
+	  features.enable = function (k) {
+	    if (_rules[k] && !_rules[k].enabled) {
+	      _rules[k].enable();
 
-	var uiInfoPanels = {
-	    background: uiPanelBackground,
-	    history: uiPanelHistory,
-	    location: uiPanelLocation,
-	    measurement: uiPanelMeasurement,
-	};
+	      update();
+	    }
+	  };
 
-	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;
-	        }
-	    });
+	  features.enableAll = function () {
+	    var didEnable = false;
 
+	    for (var k in _rules) {
+	      if (!_rules[k].enabled) {
+	        didEnable = true;
 
-	    function info(selection) {
+	        _rules[k].enable();
+	      }
+	    }
 
-	        function redraw() {
-	            var activeids = ids.filter(function(k) { return active[k]; }).sort();
+	    if (didEnable) update();
+	  };
 
-	            var containers = infoPanels.selectAll('.panel-container')
-	                .data(activeids, function(k) { return k; });
+	  features.disable = function (k) {
+	    if (_rules[k] && _rules[k].enabled) {
+	      _rules[k].disable();
 
-	            containers.exit()
-	                .style('opacity', 1)
-	                .transition()
-	                .duration(200)
-	                .style('opacity', 0)
-	                .on('end', function(d) {
-	                    select(this)
-	                        .call(panels[d].off)
-	                        .remove();
-	                });
+	      update();
+	    }
+	  };
 
-	            var enter = containers.enter()
-	                .append('div')
-	                .attr('class', function(d) { return 'fillD2 panel-container panel-container-' + d; });
+	  features.disableAll = function () {
+	    var didDisable = false;
 
-	            enter
-	                .style('opacity', 0)
-	                .transition()
-	                .duration(200)
-	                .style('opacity', 1);
+	    for (var k in _rules) {
+	      if (_rules[k].enabled) {
+	        didDisable = true;
 
-	            var title = enter
-	                .append('div')
-	                .attr('class', 'panel-title fillD2');
+	        _rules[k].disable();
+	      }
+	    }
 
-	            title
-	                .append('h3')
-	                .text(function(d) { return panels[d].title; });
+	    if (didDisable) update();
+	  };
 
-	            title
-	                .append('button')
-	                .attr('class', 'close')
-	                .on('click', function (d) { info.toggle(d); })
-	                .call(svgIcon('#iD-icon-close'));
+	  features.toggle = function (k) {
+	    if (_rules[k]) {
+	      (function (f) {
+	        return f.enabled ? f.disable() : f.enable();
+	      })(_rules[k]);
 
-	            enter
-	                .append('div')
-	                .attr('class', function(d) { return 'panel-content panel-content-' + d; });
+	      update();
+	    }
+	  };
 
+	  features.resetStats = function () {
+	    for (var i = 0; i < _keys.length; i++) {
+	      _rules[_keys[i]].count = 0;
+	    }
 
-	            // redraw the panels
-	            infoPanels.selectAll('.panel-content')
-	                .each(function(d) {
-	                    select(this).call(panels[d]);
-	                });
-	        }
+	    dispatch$1.call('change');
+	  };
 
+	  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;
 
-	        info.toggle = function(which) {
-	            if (event) {
-	                event.stopImmediatePropagation();
-	                event.preventDefault();
-	            }
+	    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..
 
-	            var activeids = ids.filter(function(k) { return active[k]; });
 
-	            if (which) {  // toggle one
-	                active[which] = !active[which];
-	                if (activeids.length === 1 && activeids[0] === which) {  // none active anymore
-	                    wasActive = [which];
-	                }
+	    _cullFactor = dimensions[0] * dimensions[1] / 1000000;
 
-	                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; });
-	                }
-	            }
+	    for (i = 0; i < entities.length; i++) {
+	      geometry = entities[i].geometry(resolver);
+	      matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
 
-	            redraw();
-	        };
+	      for (j = 0; j < matches.length; j++) {
+	        _rules[matches[j]].count++;
+	      }
+	    }
 
+	    currHidden = features.hidden();
 
-	        var infoPanels = selection.selectAll('.info-panels')
-	            .data([0]);
+	    if (currHidden !== _hidden) {
+	      _hidden = currHidden;
+	      needsRedraw = true;
+	      dispatch$1.call('change');
+	    }
 
-	        infoPanels = infoPanels.enter()
-	            .append('div')
-	            .attr('class', 'info-panels')
-	            .merge(infoPanels);
+	    return needsRedraw;
+	  };
 
-	        redraw();
+	  features.stats = function () {
+	    for (var i = 0; i < _keys.length; i++) {
+	      _stats[_keys[i]] = _rules[_keys[i]].count;
+	    }
 
-	        context.keybinding()
-	            .on(uiCmd('⌘' + _t('info_panels.key')), info.toggle);
+	    return _stats;
+	  };
 
-	        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); });
-	        });
+	  features.clear = function (d) {
+	    for (var i = 0; i < d.length; i++) {
+	      features.clearEntity(d[i]);
 	    }
+	  };
 
-	    return info;
-	}
+	  features.clearEntity = function (entity) {
+	    delete _cache[osmEntity.key(entity)];
+	  };
 
-	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
-	    };
-	}
+	  features.reset = function () {
+	    Array.from(_deferred).forEach(function (handle) {
+	      window.cancelIdleCallback(handle);
 
+	      _deferred["delete"](handle);
+	    });
+	    _cache = {};
+	  }; // only certain relations are worth checking
 
-	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
-	        };
-	    } else {
-	        box = locOrBox;
-	    }
 
-	    return {
-	        left: box.left - padding,
-	        top: box.top - padding,
-	        width: (box.width || 0) + 2 * padding,
-	        height: (box.width || 0) + 2 * padding
-	    };
-	}
+	  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);
 
-	function icon(name, svgklass, useklass) {
-	    return '<svg class="icon ' + (svgklass || '') + '">' +
-	         '<use xlink:href="' + name + '"' +
-	         (useklass ? ' class="' + useklass + '"' : '') + '></use></svg>';
-	}
+	    if (!_cache[ent]) {
+	      _cache[ent] = {};
+	    }
 
-	var helpStringReplacements;
+	    if (!_cache[ent].matches) {
+	      var matches = {};
+	      var hasMatch = false;
 
-	// 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.label'),
-	        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;
-	    }
+	      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,
 
-	    return _t(id, reps)
-	         // use keyboard key styling for shortcuts
-	        .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
-	}
+	          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]);
 
-	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
-	}
+	              if (_cache[pkey] && _cache[pkey].matches) {
+	                matches = Object.assign({}, _cache[pkey].matches); // shallow copy
 
+	                continue;
+	              }
+	            }
+	          }
+	        }
 
-	// 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
+	        if (_rules[_keys[i]].filter(entity.tags, geometry)) {
+	          matches[_keys[i]] = hasMatch = true;
+	        }
+	      }
+
+	      _cache[ent].matches = matches;
 	    }
-	}
 
+	    return _cache[ent].matches;
+	  };
 
-	function localize(obj) {
-	    var key;
+	  features.getParents = function (entity, resolver, geometry) {
+	    if (geometry === 'point') return [];
+	    var ent = osmEntity.key(entity);
 
-	    // 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;
-	                }
-	            }
-	        });
+	    if (!_cache[ent]) {
+	      _cache[ent] = {};
 	    }
 
-	    return obj;
-	}
+	    if (!_cache[ent].parents) {
+	      var parents = [];
 
+	      if (geometry === 'vertex') {
+	        parents = resolver.parentWays(entity);
+	      } else {
+	        // 'line', 'area', 'relation'
+	        parents = resolver.parentRelations(entity);
+	      }
 
-	// 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
+	      _cache[ent].parents = parents;
+	    }
 
-	    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];
+	    return _cache[ent].parents;
+	  };
 
-	        var dotp = geoVecNormalizedDot(a, b, origin);
-	        var mag = Math.abs(dotp);
-	        if (mag > lowerBound && mag < upperBound) {
-	            return false;
+	  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;
 	        }
+
+	        return false;
+	      }
 	    }
 
-	    return true;
-	}
+	    return false;
+	  };
+
+	  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;
 
-	function selectMenuItem(context, operation) {
-	    return context.container().select('.edit-menu .edit-menu-item-' + operation);
-	}
+	    for (var i = 0; i < parents.length; i++) {
+	      if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
+	        return false;
+	      }
+	    }
 
+	    return true;
+	  };
 
-	function transitionTime(point1, point2) {
-	    var distance = geoSphericalDistance(point1, point2);
-	    if (distance === 0)
-	        { return 0; }
-	    else if (distance < 80)
-	        { return 500; }
-	    else
-	        { return 1000; }
-	}
+	  features.hasHiddenConnections = function (entity, resolver) {
+	    if (!_hidden.length) return false;
+	    var childNodes, connections;
 
-	// Tooltips and svg mask used to highlight certain features
-	function uiCurtain(containerNode) {
+	    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 surface = select(null),
-	        tooltip = select(null),
-	        darkness = select(null);
 
-	    function curtain(selection) {
-	        surface = selection
-	            .append('svg')
-	            .attr('class', 'curtain')
-	            .style('top', 0)
-	            .style('left', 0);
+	    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));
+	    });
+	  };
 
-	        darkness = surface.append('path')
-	            .attr('x', 0)
-	            .attr('y', 0)
-	            .attr('class', 'curtain-darkness');
+	  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);
+	  };
 
-	        select(window).on('resize.curtain', resize);
+	  features.filter = function (d, resolver) {
+	    if (!_hidden.length) return d;
+	    var result = [];
 
-	        tooltip = selection.append('div')
-	            .attr('class', 'tooltip');
+	    for (var i = 0; i < d.length; i++) {
+	      var entity = d[i];
 
-	        tooltip
-	            .append('div')
-	            .attr('class', 'popover-arrow');
+	      if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
+	        result.push(entity);
+	      }
+	    }
 
-	        tooltip
-	            .append('div')
-	            .attr('class', 'popover-inner');
+	    return result;
+	  };
 
-	        resize();
+	  features.forceVisible = function (entityIDs) {
+	    if (!arguments.length) return Object.keys(_forceVisible);
+	    _forceVisible = {};
 
+	    for (var i = 0; i < entityIDs.length; i++) {
+	      _forceVisible[entityIDs[i]] = true;
+	      var entity = context.hasEntity(entityIDs[i]);
 
-	        function resize() {
-	            surface
-	                .attr('width', containerNode.clientWidth)
-	                .attr('height', containerNode.clientHeight);
-	            curtain.cut(darkness.datum());
+	      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;
+	  };
 
-	    /**
-	     * 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 (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>';
-	            }
+	  features.init = function () {
+	    var storage = corePreferences('disabled-features');
 
-	            html = html.replace(/\*(.*?)\*/g, '<em>$1</em>');   // emphasis
-	            html = html.replace(/\{br\}/g, '<br/><br/>');       // linebreak
+	    if (storage) {
+	      var storageDisabled = storage.replace(/;/g, ',').split(',');
+	      storageDisabled.forEach(features.disable);
+	    }
 
-	            if (options.buttonText && options.buttonCallback) {
-	                html += '<div class="button-section">' +
-	                    '<button href="#" class="button action">' + options.buttonText + '</button></div>';
-	            }
+	    var hash = utilStringQs(window.location.hash);
 
-	            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();
-	                    });
-	            }
+	    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
 
-	            var tip = copyBox(tooltip.node().getBoundingClientRect()),
-	                w = containerNode.clientWidth,
-	                h = containerNode.clientHeight,
-	                tooltipWidth = 200,
-	                tooltipArrow = 5,
-	                side, pos;
 
+	  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
 
-	            // hack: this will have bottom placement,
-	            // so need to reserve extra space for the tooltip illustration.
-	            if (options.tooltipClass === 'intro-mouse') {
-	                tip.height += 80;
-	            }
+	      var entities = [].concat(types.relation || [], types.way || [], types.node || []);
 
-	            // 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);
-	            }
+	      for (var i = 0; i < entities.length; i++) {
+	        var geometry = entities[i].geometry(graph);
+	        features.getMatches(entities[i], graph, geometry);
+	      }
+	    });
 
-	            // determine tooltip placement..
+	    _deferred.add(handle);
+	  });
+	  return features;
+	}
 
-	            if (tooltipBox.top + tooltipBox.height < 100) {
-	                // tooltip below box..
-	                side = 'bottom';
-	                pos = [
-	                    tooltipBox.left + tooltipBox.width / 2 - tip.width / 2,
-	                    tooltipBox.top + tooltipBox.height
-	                ];
+	//
+	// - 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
+	//
 
-	            } else if (tooltipBox.top > h - 140) {
-	                // tooltip above box..
-	                side = 'top';
-	                pos = [
-	                    tooltipBox.left + tooltipBox.width / 2 - tip.width / 2,
-	                    tooltipBox.top - tip.height
-	                ];
+	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;
 
-	            } else {
-	                // tooltip to the side of the tooltipBox..
-	                var tipY = tooltipBox.top + tooltipBox.height / 2 - tip.height / 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;
+	        }
+
+	        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 (_mainLocalizer.textDirection() === 'rtl') {
-	                    if (tooltipBox.left - tooltipWidth - tooltipArrow < 70) {
-	                        side = 'right';
-	                        pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+	  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;
 
-	                    } else {
-	                        side = 'left';
-	                        pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
-	                    }
+	    if (shouldReverse(entity)) {
+	      coordinates.reverse();
+	    }
 
-	                } 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];
-	                    }
-	                }
-	            }
+	    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];
 
-	            if (options.duration !== 0 || !tooltip.classed(side)) {
-	                tooltip.call(uiToggle(true));
-	            }
+	        if (a) {
+	          var span = geoVecLength(a, b) - offset;
 
-	            tooltip
-	                .style('top', pos[1] + 'px')
-	                .style('left', pos[0] + 'px')
-	                .attr('class', classes + ' ' + side);
+	          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];
 
-	            // 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;
-	                }
+	            for (span -= dt; span >= 0; span -= dt) {
+	              p = geoVecAdd(p, [dx, dy]);
+	              coord.push(p);
 	            }
-	            tooltip.selectAll('.popover-inner')
-	                .style('top', shiftY + 'px');
-
-	        } else {
-	            tooltip
-	                .classed('in', false)
-	                .call(uiToggle(false));
-	        }
-
-	        curtain.cut(box, options.duration);
-
-	        return tooltip;
-	    };
 
+	            coord.push(b); // generate svg paths
 
-	    curtain.cut = function(datum, duration) {
-	        darkness.datum(datum)
-	            .interrupt();
+	            var segment = '';
+	            var j;
 
-	        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';
+	            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
 	            });
-	    };
-
-
-	    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 copyBox(src) {
-	        return {
-	            top: src.top,
-	            right: src.right,
-	            bottom: src.bottom,
-	            left: src.left,
-	            width: src.width,
-	            height: src.height
-	        };
-	    }
 
+	            if (bothDirections(entity)) {
+	              segment = '';
 
-	    return curtain;
-	}
-
-	function uiIntroWelcome(context, reveal) {
-	    var dispatch$1 = dispatch('done');
+	              for (j = coord.length - 1; j >= 0; j--) {
+	                segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+	              }
 
-	    var chapter = {
-	        title: 'intro.welcome.title'
-	    };
+	              segments.push({
+	                id: entity.id,
+	                index: i++,
+	                d: segment
+	              });
+	            }
+	          }
 
+	          offset = -span;
+	        }
 
-	    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 }
-	        );
+	        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));
 	    }
+	  });
 
-	    function practice() {
-	        reveal('.intro-nav-wrap .chapter-welcome',
-	            helpString('intro.welcome.practice'),
-	            { buttonText: _t('intro.ok'), buttonCallback: words }
-	        );
+	  var svgpath = function svgpath(entity) {
+	    if (entity.id in cache) {
+	      return cache[entity.id];
+	    } else {
+	      return cache[entity.id] = path(entity.asGeoJSON(graph));
 	    }
+	  };
 
-	    function words() {
-	        reveal('.intro-nav-wrap .chapter-welcome',
-	            helpString('intro.welcome.words'),
-	            { buttonText: _t('intro.ok'), buttonCallback: chapters }
-	        );
+	  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);
 	    }
+	  };
 
+	  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] + ')';
+	  };
 
-	    function chapters() {
-	        dispatch$1.call('done');
-	        reveal('.intro-nav-wrap .chapter-navigation',
-	            helpString('intro.welcome.chapters', { next: _t('intro.navigation.title') })
-	        );
-	    }
-
+	  svgpoint.geojson = function (d) {
+	    return svgpoint(d.properties.entity);
+	  };
 
-	    chapter.enter = function() {
-	        welcome();
-	    };
+	  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;
 
+	      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();
+	  }
 
-	    chapter.exit = function() {
-	        context.container().select('.curtain-tooltip.intro-mouse')
-	            .selectAll('.counter')
-	            .remove();
+	  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
+	      };
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
-
+	      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);
+	        }
+	      }
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	      start = end;
+	    }
 
-	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'
-	    };
+	    return features;
 
+	    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 timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
+	    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 eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
-	    }
+	      var t = _tags(entity);
 
+	      var computed = tagClasses.getClassesString(t, value);
 
-	    function isTownHallSelected() {
-	        var ids = context.selectedIDs();
-	        return ids.length === 1 && ids[0] === hallId;
-	    }
+	      if (computed !== value) {
+	        select(this).attr('class', computed);
+	      }
+	    });
+	  };
 
+	  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
 
-	    function dragMap() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
+	    var overrideGeometry;
 
-	        var msec = transitionTime(townHall, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(townHall, 19, msec);
+	    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';
+	      }
 
-	        timeout(function() {
-	            var centerStart = context.map().center();
+	      primary = k;
 
-	            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 });
-	            });
+	      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);
+	      }
 
-	            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);
-	                }
-	            });
+	      break;
+	    }
 
-	        }, msec + 100);
+	    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 continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
+	          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;
+	      }
 	    }
 
+	    if (status) {
+	      classes.push('tag-status');
+	      classes.push('tag-status-' + status);
+	    } // add any secondary tags
 
-	    function zoomMap() {
-	        var zoomStart = context.map().zoom();
 
-	        var textId = context.lastPointerType() === 'mouse' ? 'zoom' : 'zoom_touch';
-	        var zoomString = helpString('intro.navigation.' + textId);
+	    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..
 
-	        reveal('.surface', zoomString);
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', zoomString, { duration: 0 });
-	        });
+	    if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
+	      var surface = t.highway === 'track' ? 'unpaved' : 'paved';
 
-	        context.map().on('move.intro', function() {
-	            if (context.map().zoom() !== zoomStart) {
-	                context.map().on('move.intro', null);
-	                timeout(function() { continueTo(features); }, 3000);
-	            }
-	        });
+	      for (k in t) {
+	        v = t[k];
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
+	        if (k in osmPavedTags) {
+	          surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
 	        }
-	    }
 
+	        if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
+	          surface = 'semipaved';
+	        }
+	      }
 
-	    function features() {
-	        var onClick = function() { continueTo(pointsLinesAreas); };
-
-	        reveal('.surface', helpString('intro.navigation.features'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	      classes.push('tag-' + surface);
+	    } // If this is a wikidata-tagged item, add a class for that..
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', helpString('intro.navigation.features'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
 
-	        function continueTo(nextStep) {
-	            context.map().on('drawn.intro', null);
-	            nextStep();
-	        }
+	    if (t.wikidata || t['brand:wikidata']) {
+	      classes.push('tag-wikidata');
 	    }
 
-	    function pointsLinesAreas() {
-	        var onClick = function() { continueTo(nodesWays); };
-
-	        reveal('.surface', helpString('intro.navigation.points_lines_areas'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	    return classes.join(' ').trim();
+	  };
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', helpString('intro.navigation.points_lines_areas'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	  tagClasses.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
+	    return tagClasses;
+	  };
 
-	        function continueTo(nextStep) {
-	            context.map().on('drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	  return tagClasses;
+	}
 
-	    function nodesWays() {
-	        var onClick = function() { continueTo(clickTownHall); };
+	// 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;
+	  }
 
-	        reveal('.surface', helpString('intro.navigation.nodes_ways'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	  for (var tag in patterns) {
+	    var entityValue = tags[tag];
+	    if (!entityValue) continue;
 
-	        context.map().on('drawn.intro', function() {
-	            reveal('.surface', helpString('intro.navigation.nodes_ways'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	    if (typeof patterns[tag] === 'string') {
+	      // extra short syntax (just tag) - pattern name
+	      return 'pattern-' + patterns[tag];
+	    } else {
+	      var values = patterns[tag];
 
-	        function continueTo(nextStep) {
-	            context.map().on('drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	      for (var value in values) {
+	        if (entityValue !== value) continue;
+	        var rules = values[value];
 
-	    function clickTownHall() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
+	        if (typeof rules === 'string') {
+	          // short syntax - pattern name
+	          return 'pattern-' + rules;
+	        } // long syntax - rule array
 
-	        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 });
-	            });
 
-	            context.on('enter.intro', function() {
-	                if (isTownHallSelected()) { continueTo(selectedTownHall); }
-	            });
+	        for (var ruleKey in rules) {
+	          var rule = rules[ruleKey];
+	          var pass = true;
 
-	        }, 550);  // after centerZoomEase
+	          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() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
+	              if (!v || v !== rule[criterion]) {
+	                pass = false;
+	                break;
+	              }
 	            }
-	        });
+	          }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
+	          if (pass) {
+	            return 'pattern-' + rule.pattern;
+	          }
 	        }
+	      }
 	    }
+	  }
 
+	  return null;
+	}
 
-	    function selectedTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
-
-	        var entity = context.hasEntity(hallId);
-	        if (!entity) { return clickTownHall(); }
+	function svgAreas(projection, context) {
+	  function getPatternStyle(tags) {
+	    var imageID = svgTagPattern(tags);
 
-	        var box = pointBox(entity.loc, context);
-	        var onClick = function() { continueTo(editorTownHall); };
+	    if (imageID) {
+	      return 'url("#ideditor-' + imageID + '")';
+	    }
 
-	        reveal(box, helpString('intro.navigation.selected_townhall'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	    return '';
+	  }
 
-	        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 }
-	            );
-	        });
+	  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
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	    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
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	    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
 
+	    targets.exit().remove();
 
-	    function editorTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
+	    var segmentWasEdited = function segmentWasEdited(d) {
+	      var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	      if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+	        return false;
+	      }
 
-	        var onClick = function() { continueTo(presetTownHall); };
+	      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
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.navigation.editor_townhall'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
 
-	        context.on('exit.intro', function() {
-	            continueTo(clickTownHall);
-	        });
+	    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
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	    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
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            nextStep();
-	        }
-	    }
+	    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 presetTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
+	  function drawAreas(selection, graph, entities, filter) {
+	    var path = svgPath(projection, graph, true);
+	    var areas = {};
+	    var multipolygon;
+	    var base = context.history().base();
 
-	        // 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);
+	    for (var i = 0; i < entities.length; i++) {
+	      var entity = entities[i];
+	      if (entity.geometry(graph) !== 'area') continue;
+	      multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
 
-	        // preset match, in case the user happened to change it.
-	        var entity = context.entity(context.selectedIDs()[0]);
-	        var preset = _mainPresetIndex.match(entity, context.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))
+	        };
+	      }
+	    }
 
-	        var onClick = function() { continueTo(fieldsTownHall); };
+	    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))];
+	      }
+	    }
 
-	        reveal('.entity-editor-pane .section-feature-type',
-	            helpString('intro.navigation.preset_townhall', { preset: preset.name() }),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	    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);
 
-	        context.on('exit.intro', function() {
-	            continueTo(clickTownHall);
-	        });
+	      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..
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	    touchLayer.call(drawTargets, graph, data.stroke, filter);
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            nextStep();
-	        }
-	    }
+	  return drawAreas;
+	}
 
+	//[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
 
-	    function fieldsTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
+	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
 
-	        // 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 S_TAG = 0; //tag name offerring
 
-	        var onClick = function() { continueTo(closeTownHall); };
+	var S_ATTR = 1; //attr name offerring 
 
-	        reveal('.entity-editor-pane .section-preset-fields',
-	            helpString('intro.navigation.fields_townhall'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	var S_ATTR_SPACE = 2; //attr name end and space offer
 
-	        context.on('exit.intro', function() {
-	            continueTo(clickTownHall);
-	        });
+	var S_EQ = 3; //=space?
 
-	        context.history().on('change.intro', function() {
-	            if (!context.hasEntity(hallId)) {
-	                continueTo(clickTownHall);
-	            }
-	        });
+	var S_ATTR_NOQUOT_VALUE = 4; //attr value(no quot value only)
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            context.container().select('.inspector-wrap').on('wheel.intro', null);
-	            nextStep();
-	        }
-	    }
+	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)
 
-	    function closeTownHall() {
-	        if (!isTownHallSelected()) { return clickTownHall(); }
+	var S_TAG_CLOSE = 7; //closed el<el />
 
-	        var selector = '.entity-editor-pane button.close svg use';
-	        var href = select(selector).attr('href') || '#iD-icon-close';
+	function XMLReader() {}
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.navigation.close_townhall', { button: icon(href, 'pre-text') })
-	        );
+	XMLReader.prototype = {
+	  parse: function parse(source, defaultNSMap, entityMap) {
+	    var domBuilder = this.domBuilder;
+	    domBuilder.startDocument();
 
-	        context.on('exit.intro', function() {
-	            continueTo(searchStreet);
-	        });
+	    _copy(defaultNSMap, defaultNSMap = {});
 
-	        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';
+	    _parse(source, defaultNSMap, entityMap, domBuilder, this.errorHandler);
 
-	            reveal('.entity-editor-pane',
-	                helpString('intro.navigation.close_townhall', { button: icon(href, 'pre-text') }),
-	                { duration: 0 }
-	            );
-	        });
+	    domBuilder.endDocument();
+	  }
+	};
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	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);
 
-	    function searchStreet() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');  // ensure spring street exists
-
-	        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
-
-	        timeout(function() {
-	            reveal('.search-header input',
-	                helpString('intro.navigation.search_street', { name: _t('intro.graph.name.spring-street') })
-	            );
+	    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;
+	    }
+	  }
 
-	            context.container().select('.search-header input')
-	                .on('keyup.intro', checkSearchResult);
-	        }, msec + 100);
+	  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)
+	    }
 
-	    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');
+	    locator.columnNumber = p - lineStart + 1;
+	  }
 
-	        if (!firstName.empty() && firstName.text() === name) {
-	            reveal(first.node(),
-	                helpString('intro.navigation.choose_street', { name: name }),
-	                { duration: 300 }
-	            );
+	  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.on('exit.intro', function() {
-	                continueTo(selectedStreet);
-	            });
+	  while (true) {
+	    try {
+	      var tagStart = source.indexOf('<', start);
 
-	            context.container().select('.search-header input')
-	                .on('keydown.intro', eventCancel, true)
-	                .on('keyup.intro', null);
+	      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;
 	        }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.container().select('.search-header input')
-	                .on('keydown.intro', null)
-	                .on('keyup.intro', null);
-	            nextStep();
-	        }
-	    }
+	        return;
+	      }
 
+	      if (tagStart > start) {
+	        appendText(tagStart);
+	      }
 
-	    function selectedStreet() {
-	        if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-	            return searchStreet();
-	        }
+	      switch (source.charAt(tagStart + 1)) {
+	        case '/':
+	          var end = source.indexOf('>', tagStart + 3);
+	          var tagName = source.substring(tagStart + 2, end);
+	          var config = parseStack.pop();
 
-	        var onClick = function() { continueTo(editorStreet); };
-	        var entity = context.entity(springStreetEndId);
-	        var box = pointBox(entity.loc, context);
-	        box.height = 500;
+	          if (end < 0) {
+	            tagName = source.substring(tagStart + 2).replace(/[\s<].*/, ''); //console.error('#@@@@@@'+tagName)
 
-	        reveal(box,
-	            helpString('intro.navigation.selected_street', { name: _t('intro.graph.name.spring-street') }),
-	            { duration: 600, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	            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);
 
-	        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.
 
-	        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]));
+	          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);
+	              }
 	            }
-	        });
 
-	        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 (!endMatch) {
+	              errorHandler.fatalError("end tag name: " + tagName + ' is not match the current start tagName:' + config.tagName);
 	            }
-	        });
+	          } else {
+	            parseStack.push(config);
+	          }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	          end++;
+	          break;
+	        // end elment
 
+	        case '?':
+	          // <?...?>
+	          locator && position(tagStart);
+	          end = parseInstruction(source, tagStart, domBuilder);
+	          break;
 
-	    function editorStreet() {
-	        var selector = '.entity-editor-pane button.close svg use';
-	        var href = select(selector).attr('href') || '#iD-icon-close';
+	        case '!':
+	          // <!doctype,<![CDATA,<!--
+	          locator && position(tagStart);
+	          end = parseDCC(source, tagStart, domBuilder, errorHandler);
+	          break;
 
-	        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()
-	            }));
+	        default:
+	          locator && position(tagStart);
+	          var el = new ElementAttributes();
+	          var currentNSMap = parseStack[parseStack.length - 1].currentNSMap; //elStartEnd
 
-	        context.on('exit.intro', function() {
-	            continueTo(play);
-	        });
+	          var end = parseElementStartPart(source, tagStart, el, currentNSMap, entityReplacer, errorHandler);
+	          var len = el.length;
 
-	        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 (!el.closed && fixSelfClosed(source, end, el.tagName, closeMap)) {
+	            el.closed = true;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	            if (!entityMap.nbsp) {
+	              errorHandler.warning('unclosed xml attribute');
+	            }
+	          }
 
+	          if (locator && len) {
+	            var locator2 = copyLocator(locator, {}); //try{//attribute position fixed
 
-	    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'); }
-	            }
-	        );
-	    }
+	            for (var i = 0; i < len; i++) {
+	              var a = el[i];
+	              position(a.offset);
+	              a.locator = copyLocator(locator, {});
+	            } //}catch(e){console.error('@@@@@'+e)}
 
 
-	    chapter.enter = function() {
-	        dragMap();
-	    };
+	            domBuilder.locator = locator2;
 
+	            if (appendElement(el, domBuilder, currentNSMap)) {
+	              parseStack.push(el);
+	            }
 
-	    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);
-	    };
+	            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++;
+	          }
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	      }
+	    } catch (e) {
+	      errorHandler.error('element parse error: ' + e); //errorHandler.error('element parse error: '+e);
 
+	      end = -1; //throw e;
+	    }
 
-	    return utilRebind(chapter, dispatch$1, 'on');
+	    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 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;
+	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)
+	 */
 
 
-	    var chapter = {
-	        title: 'intro.points.title'
-	    };
+	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');
+	        }
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
-	    }
+	        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);
+	            }
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
-	    }
+	            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)
 
-	    function addPoint() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
+	          el.add(attrName, value, start); //console.dir(el)
 
-	        var msec = transitionTime(intersection, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(intersection, 19, msec);
+	          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 "="');
+	        }
 
-	        timeout(function() {
-	            var tooltip = reveal('button.add-point',
-	                helpString('intro.points.points_info') + '{br}' + helpString('intro.points.add_point'));
+	        break;
 
-	            _pointID = null;
+	      case '/':
+	        switch (s) {
+	          case S_TAG:
+	            el.setTagName(source.slice(start, p));
 
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-points');
+	          case S_ATTR_END:
+	          case S_TAG_SPACE:
+	          case S_TAG_CLOSE:
+	            s = S_TAG_CLOSE;
+	            el.closed = true;
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-point') { return; }
-	                continueTo(placePoint);
-	            });
-	        }, msec + 100);
+	          case S_ATTR_NOQUOT_VALUE:
+	          case S_ATTR:
+	          case S_ATTR_SPACE:
+	            break;
+	          //case S_EQ:
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
+	          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');
 
-	    function placePoint() {
-	        if (context.mode().id !== 'add-point') {
-	            return chapter.restart();
+	        if (s == S_TAG) {
+	          el.setTagName(source.slice(start, p));
 	        }
 
-	        var pointBox = pad(building, 150, context);
-	        var textId = context.lastPointerType() === 'mouse' ? 'place_point' : 'place_point_touch';
-	        reveal(pointBox, helpString('intro.points.' + textId));
-
-	        context.map().on('move.intro drawn.intro', function() {
-	            pointBox = pad(building, 150, context);
-	            reveal(pointBox, helpString('intro.points.' + textId), { duration: 0 });
-	        });
+	        return p;
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') { return chapter.restart(); }
-	            _pointID = context.mode().selectedIDs()[0];
-	            continueTo(searchPreset);
-	        });
+	      case '>':
+	        switch (s) {
+	          case S_TAG:
+	            el.setTagName(source.slice(start, p));
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	          case S_ATTR_END:
+	          case S_TAG_SPACE:
+	          case S_TAG_CLOSE:
+	            break;
+	          //normal
 
+	          case S_ATTR_NOQUOT_VALUE: //Compatible state
 
-	    function searchPreset() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return addPoint();
-	        }
+	          case S_ATTR:
+	            value = source.slice(start, p);
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	            if (value.slice(-1) === '/') {
+	              el.closed = true;
+	              value = value.slice(0, -1);
+	            }
 
-	        context.container().select('.preset-search-input')
-	            .on('keydown.intro', null)
-	            .on('keyup.intro', checkPresetSearch);
+	          case S_ATTR_SPACE:
+	            if (s === S_ATTR_SPACE) {
+	              value = attrName;
+	            }
 
-	        reveal('.preset-search-input',
-	            helpString('intro.points.search_cafe', { preset: cafePreset.name() })
-	        );
+	            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!!');
+	              }
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_pointID || !context.hasEntity(_pointID)) {
-	                return continueTo(addPoint);
+	              el.add(value, value, start);
 	            }
 
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
-	                // keep the user's point selected..
-	                context.enter(modeSelect(context, [_pointID]));
+	            break;
 
-	                // disallow scrolling
-	                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	          case S_EQ:
+	            throw new Error('attribute value missed!!');
+	        } //			console.log(tagName,tagNamePattern,tagNamePattern.test(tagName))
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', null)
-	                    .on('keyup.intro', checkPresetSearch);
 
-	                reveal('.preset-search-input',
-	                    helpString('intro.points.search_cafe', { preset: cafePreset.name() })
-	                );
+	        return p;
 
-	                context.history().on('change.intro', null);
-	            }
-	        });
+	      /*xml space '\x20' | #x9 | #xD | #xA; */
 
+	      case "\x80":
+	        c = ' ';
 
-	        function checkPresetSearch() {
-	            var first = context.container().select('.preset-list-item:first-child');
+	      default:
+	        if (c <= ' ') {
+	          //space
+	          switch (s) {
+	            case S_TAG:
+	              el.setTagName(source.slice(start, p)); //tagName
 
-	            if (first.classed('preset-amenity-cafe')) {
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', eventCancel, true)
-	                    .on('keyup.intro', null);
+	              s = S_TAG_SPACE;
+	              break;
 
-	                reveal(first.select('.preset-list-button').node(),
-	                    helpString('intro.points.choose_cafe', { preset: cafePreset.name() }),
-	                    { duration: 300 }
-	                );
+	            case S_ATTR:
+	              attrName = source.slice(start, p);
+	              s = S_ATTR_SPACE;
+	              break;
 
-	                context.history().on('change.intro', function() {
-	                    continueTo(aboutFeatureEditor);
-	                });
-	            }
-	        }
+	            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);
-	            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();
-	        }
-	    }
+	            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 aboutFeatureEditor() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return addPoint();
-	        }
+	            case S_ATTR_END:
+	              errorHandler.warning('attribute space is required"' + attrName + '"!!');
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane', helpString('intro.points.feature_editor'), {
-	                tooltipClass: 'intro-points-describe',
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { continueTo(addName); }
-	            });
-	        }, 400);
+	            case S_TAG_SPACE:
+	              s = S_ATTR;
+	              start = p;
+	              break;
 
-	        context.on('exit.intro', function() {
-	            // if user leaves select mode here, just continue with the tutorial.
-	            continueTo(reselectPoint);
-	        });
+	            case S_EQ:
+	              s = S_ATTR_NOQUOT_VALUE;
+	              start = p;
+	              break;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
+	            case S_TAG_CLOSE:
+	              throw new Error("elements closed character '/' and '>' must be connected to");
+	          }
 	        }
-	    }
-
 
-	    function addName() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return addPoint();
-	        }
+	    } //end outer switch
+	    //console.log('p++',p)
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
 
-	        var addNameString = helpString('intro.points.fields_info') + '{br}' + helpString('intro.points.add_name');
+	    p++;
+	  }
+	}
+	/**
+	 * @return true if has new namespace define
+	 */
 
-	        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');
 
-	            } else {
-	                reveal('.entity-editor-pane', addNameString,
-	                    { tooltipClass: 'intro-points-describe' }
-	                );
-	            }
-	        }, 400);
+	function appendElement(el, domBuilder, currentNSMap) {
+	  var tagName = el.tagName;
+	  var localNSMap = null; //var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
 
-	        context.history().on('change.intro', function() {
-	            continueTo(addCloseEditor);
-	        });
+	  var i = el.length;
 
-	        context.on('exit.intro', function() {
-	            // if user leaves select mode here, just continue with the tutorial.
-	            continueTo(reselectPoint);
-	        });
+	  while (i--) {
+	    var a = el[i];
+	    var qName = a.qName;
+	    var value = a.value;
+	    var nsp = qName.indexOf(':');
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	    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 !== ''
 
 
-	    function addCloseEditor() {
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	    a.localName = localName; //prefix == null for no ns prefix attribute 
 
-	        var selector = '.entity-editor-pane button.close svg use';
-	        var href = select(selector).attr('href') || '#iD-icon-close';
+	    if (nsPrefix !== false) {
+	      //hack!!
+	      if (localNSMap == null) {
+	        localNSMap = {}; //console.log(currentNSMap,0)
 
-	        context.on('exit.intro', function() {
-	            continueTo(reselectPoint);
-	        });
+	        _copy(currentNSMap, currentNSMap = {}); //console.log(currentNSMap,1)
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.points.add_close', { button: icon(href, 'pre-text') })
-	        );
+	      }
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	      currentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;
+	      a.uri = 'http://www.w3.org/2000/xmlns/';
+	      domBuilder.startPrefixMapping(nsPrefix, value);
 	    }
+	  }
 
+	  var i = el.length;
 
-	    function reselectPoint() {
-	        if (!_pointID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_pointID);
-	        if (!entity) { return chapter.restart(); }
+	  while (i--) {
+	    a = el[i];
+	    var prefix = a.prefix;
 
-	        // 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));
+	    if (prefix) {
+	      //no prefix attribute has no namespace
+	      if (prefix === 'xml') {
+	        a.uri = 'http://www.w3.org/XML/1998/namespace';
+	      }
 
-	        context.enter(modeBrowse(context));
+	      if (prefix !== 'xmlns') {
+	        a.uri = currentNSMap[prefix || '']; //{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}
+	      }
+	    }
+	  }
+
+	  var nsp = tagName.indexOf(':');
 
-	        var msec = transitionTime(entity.loc, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerEase(entity.loc, msec);
+	  if (nsp > 0) {
+	    prefix = el.prefix = tagName.slice(0, nsp);
+	    localName = el.localName = tagName.slice(nsp + 1);
+	  } else {
+	    prefix = null; //important!!
 
-	        timeout(function() {
-	            var box = pointBox(entity.loc, context);
-	            reveal(box, helpString('intro.points.reselect'), { duration: 600 });
+	    localName = el.localName = tagName;
+	  } //no prefix element has default namespace
 
-	            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..
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'select') { return; }
-	                continueTo(updatePoint);
-	            });
+	  var ns = el.uri = currentNSMap[prefix || ''];
+	  domBuilder.startElement(ns, localName, tagName, el); //endPrefixMapping and startPrefixMapping have not any help for dom builder
+	  //localNSMap = null
 
-	        }, msec + 100);
+	  if (el.closed) {
+	    domBuilder.endElement(ns, localName, tagName);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            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 updatePoint() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return continueTo(reselectPoint);
-	        }
-
-	        // reset pane, in case user happened to untag the point..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	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() {
-	            continueTo(reselectPoint);
-	        });
+	    if (/[&<]/.test(text)) {
+	      if (/^script$/i.test(tagName)) {
+	        //if(!/\]\]>/.test(text)){
+	        //lexHandler.startCDATA();
+	        domBuilder.characters(text, 0, text.length); //lexHandler.endCDATA();
 
-	        context.history().on('change.intro', function() {
-	            continueTo(updateCloseEditor);
-	        });
+	        return elEndStart; //}
+	      } //}else{//text area
 
-	        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();
-	        }
+	      text = text.replace(/&#?\w+;/g, entityReplacer);
+	      domBuilder.characters(text, 0, text.length);
+	      return elEndStart; //}
 	    }
+	  }
 
+	  return elStartEnd + 1;
+	}
 
-	    function updateCloseEditor() {
-	        if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-	            return continueTo(reselectPoint);
-	        }
-
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-
-	        context.on('exit.intro', function() {
-	            continueTo(rightClickPoint);
-	        });
+	function fixSelfClosed(source, elStartEnd, tagName, closeMap) {
+	  //if(tagName in closeMap){
+	  var pos = closeMap[tagName];
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.points.update_close', { button: icon('#iD-icon-close', 'pre-text') })
-	            );
-	        }, 500);
+	  if (pos == null) {
+	    //console.log(tagName)
+	    pos = source.lastIndexOf('</' + tagName + '>');
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+	    if (pos < elStartEnd) {
+	      //忘记闭合
+	      pos = source.lastIndexOf('</' + tagName);
 	    }
 
+	    closeMap[tagName] = pos;
+	  }
 
-	    function rightClickPoint() {
-	        if (!_pointID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_pointID);
-	        if (!entity) { return chapter.restart(); }
+	  return pos < elStartEnd; //} 
+	}
 
-	        context.enter(modeBrowse(context));
+	function _copy(source, target) {
+	  for (var n in source) {
+	    target[n] = source[n];
+	  }
+	}
 
-	        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
-	        });
+	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)//<!--
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro', null);
-	            nextStep();
+	        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$1(source, start);
+	      var len = matchs.length;
+
+	      if (len > 1 && /!doctype/i.test(matchs[0][0])) {
+	        var name = matchs[1][0];
+	        var pubid = len > 3 && /^public$/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 enterDelete() {
-	        if (!_pointID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_pointID);
-	        if (!entity) { return chapter.restart(); }
+	  }
 
-	        var node = selectMenuItem(context, 'delete').node();
-	        if (!node) { return continueTo(rightClickPoint); }
+	  return -1;
+	}
 
-	        reveal('.edit-menu',
-	            helpString('intro.points.delete'),
-	            { padding: 50 }
-	        );
+	function parseInstruction(source, start, domBuilder) {
+	  var end = source.indexOf('?>', start);
 
-	        timeout(function() {
-	            context.map().on('move.intro', function() {
-	                reveal('.edit-menu',
-	                    helpString('intro.points.delete'),
-	                    { duration: 0,  padding: 50 }
-	                );
-	            });
-	        }, 300); // after menu visible
+	  if (end) {
+	    var match = source.substring(start, end).match(/^<\?(\S*)\s*([\s\S]*?)\s*$/);
 
-	        context.on('exit.intro', function() {
-	            if (!_pointID) { return chapter.restart(); }
-	            var entity = context.hasEntity(_pointID);
-	            if (entity) { return continueTo(rightClickPoint); }  // point still exists
-	        });
+	    if (match) {
+	      var len = match[0].length;
+	      domBuilder.processingInstruction(match[1], match[2]);
+	      return end + 2;
+	    } else {
+	      //error
+	      return -1;
+	    }
+	  }
 
-	        context.history().on('change.intro', function(changed) {
-	            if (changed.deleted().length) {
-	                continueTo(undo);
-	            }
-	        });
+	  return -1;
+	}
+	/**
+	 * @param source
+	 */
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
+
+	function ElementAttributes(source) {}
+
+	ElementAttributes.prototype = {
+	  setTagName: function setTagName(tagName) {
+	    if (!tagNamePattern.test(tagName)) {
+	      throw new Error('invalid tagName:' + tagName);
 	    }
 
+	    this.tagName = tagName;
+	  },
+	  add: function add(qName, value, offset) {
+	    if (!tagNamePattern.test(qName)) {
+	      throw new Error('invalid attribute:' + qName);
+	    }
 
-	    function undo() {
-	        context.history().on('change.intro', function() {
-	            continueTo(play);
-	        });
+	    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){},
 
-	        reveal('.top-toolbar button.undo-button',
-	            helpString('intro.points.undo')
-	        );
+	};
 
-	        function continueTo(nextStep) {
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	function _set_proto_(thiz, parent) {
+	  thiz.__proto__ = parent;
+	  return thiz;
+	}
 
+	if (!(_set_proto_({}, _set_proto_.prototype) instanceof _set_proto_)) {
+	  _set_proto_ = function _set_proto_(thiz, parent) {
+	    function p() {}
+	    p.prototype = parent;
+	    p = new p();
 
-	    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'); }
-	            }
-	        );
+	    for (parent in thiz) {
+	      p[parent] = thiz[parent];
 	    }
 
+	    return p;
+	  };
+	}
 
-	    chapter.enter = function() {
-	        addPoint();
-	    };
+	function split$1(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;
+	  }
+	}
 
-	    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);
-	    };
+	var XMLReader_1 = XMLReader;
+	var sax = {
+	  XMLReader: XMLReader_1
+	};
 
+	/*
+	 * 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]));?
+	 */
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
 
+	function _extends(Class, Super) {
+	  var pt = Class.prototype;
 
-	    return utilRebind(chapter, dispatch$1, 'on');
+	  if (Object.create) {
+	    var ppt = Object.create(Super.prototype);
+	    pt.__proto__ = ppt;
+	  }
+
+	  if (!(pt instanceof Super)) {
+	    var t = function t() {};
+	    t.prototype = Super.prototype;
+	    t = new t();
+	    copy$1(pt, t);
+	    Class.prototype = pt = t;
+	  }
+
+	  if (pt.constructor != Class) {
+	    if (typeof Class != 'function') {
+	      console.error("unknow Class:" + Class);
+	    }
+
+	    pt.constructor = Class;
+	  }
 	}
 
-	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;
+	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; // ExceptionCode
 
-	    var chapter = {
-	        title: 'intro.areas.title'
-	    };
+	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);
+
+	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$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 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,
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
+	  /**
+	   * 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 LiveNodeList(node, refresh) {
+	  this._node = node;
+	  this._refresh = refresh;
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
-	    }
+	  _updateLiveList(this);
+	}
 
+	function _updateLiveList(list) {
+	  var inc = list._node._inc || list._node.ownerDocument._inc;
 
-	    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);
-	    }
+	  if (list._inc != inc) {
+	    var ls = list._refresh(list._node); //console.log(ls.length)
 
 
-	    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);
+	    __set__(list, 'length', ls.length);
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	    copy$1(ls, list);
+	    list._inc = inc;
+	  }
+	}
 
+	LiveNodeList.prototype.item = function (i) {
+	  _updateLiveList(this);
 
-	    function startPlayground() {
-	        if (context.mode().id !== 'add-area') {
-	            return chapter.restart();
-	        }
+	  return this[i];
+	};
 
-	        _areaID = null;
-	        context.map().zoomEase(19.5, 500);
+	_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 
+	 */
 
-	        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 }
-	            );
 
-	            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
+	function NamedNodeMap() {}
 
-	        }, 550);  // after easing
+	function _findNodeIndex(list, node) {
+	  var i = list.length;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	  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;
+	  }
 
-	    function continuePlayground() {
-	        if (context.mode().id !== 'draw-area') {
-	            return chapter.restart();
-	        }
-
-	        _areaID = null;
-	        revealPlayground(playground,
-	            helpString('intro.areas.continue_playground'),
-	            { duration: 250 }
-	        );
+	  if (el) {
+	    newAttr.ownerElement = el;
+	    var doc = el.ownerDocument;
 
-	        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();
-	            }
-	        });
+	    if (doc) {
+	      oldAttr && _onRemoveAttribute(doc, el, oldAttr);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.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 finishPlayground() {
-	        if (context.mode().id !== 'draw-area') {
-	            return chapter.restart();
-	        }
+	  if (i >= 0) {
+	    var lastIndex = list.length - 1;
 
-	        _areaID = null;
+	    while (i < lastIndex) {
+	      list[i] = list[++i];
+	    }
 
-	        var finishString = helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.areas.finish_playground');
-	        revealPlayground(playground,
-	            finishString, { duration: 250 }
-	        );
+	    list.length = lastIndex;
 
-	        timeout(function() {
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealPlayground(playground,
-	                    finishString, { duration: 0 }
-	                );
-	            });
-	        }, 250);  // after reveal
+	    if (el) {
+	      var doc = el.ownerDocument;
 
-	        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();
-	            }
-	        });
+	      if (doc) {
+	        _onRemoveAttribute(doc, el, attr);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.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 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]));
-	        }
-
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    while (i--) {
+	      var attr = this[i]; //console.log(attr.nodeName,key)
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	      if (attr.nodeName == key) {
+	        return attr;
+	      }
+	    }
+	  },
+	  setNamedItem: function setNamedItem(attr) {
+	    var el = attr.ownerElement;
 
-	            context.container().select('.preset-search-input')
-	                .on('keydown.intro', null)
-	                .on('keyup.intro', checkPresetSearch);
+	    if (el && el != this._ownerElement) {
+	      throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
+	    }
 
-	            reveal('.preset-search-input',
-	                helpString('intro.areas.search_playground', { preset: playgroundPreset.name() })
-	            );
-	        }, 400);  // after preset list pane visible..
+	    var oldAttr = this.getNamedItem(attr.nodeName);
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_areaID || !context.hasEntity(_areaID)) {
-	                return continueTo(addArea);
-	            }
+	    _addNamedNode(this._ownerElement, this, attr, oldAttr);
 
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	                // keep the user's area selected..
-	                context.enter(modeSelect(context, [_areaID]));
+	    return oldAttr;
+	  },
 
-	                // 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);
+	  /* returns Node */
+	  setNamedItemNS: function setNamedItemNS(attr) {
+	    // raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR
+	    var el = attr.ownerElement,
+	        oldAttr;
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', null)
-	                    .on('keyup.intro', checkPresetSearch);
+	    if (el && el != this._ownerElement) {
+	      throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
+	    }
 
-	                reveal('.preset-search-input',
-	                    helpString('intro.areas.search_playground', { preset: playgroundPreset.name() })
-	                );
+	    oldAttr = this.getNamedItemNS(attr.namespaceURI, attr.localName);
 
-	                context.history().on('change.intro', null);
-	            }
-	        });
+	    _addNamedNode(this._ownerElement, this, attr, oldAttr);
 
-	        function checkPresetSearch() {
-	            var first = context.container().select('.preset-list-item:first-child');
+	    return oldAttr;
+	  },
 
-	            if (first.classed('preset-leisure-playground')) {
-	                reveal(first.select('.preset-list-button').node(),
-	                    helpString('intro.areas.choose_playground', { preset: playgroundPreset.name() }),
-	                    { duration: 300 }
-	                );
+	  /* returns Node */
+	  removeNamedItem: function removeNamedItem(key) {
+	    var attr = this.getNamedItem(key);
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', eventCancel, true)
-	                    .on('keyup.intro', null);
+	    _removeNamedNode(this._ownerElement, this, attr);
 
-	                context.history().on('change.intro', function() {
-	                    continueTo(clickAddField);
-	                });
-	            }
-	        }
+	    return attr;
+	  },
+	  // raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR
+	  //for level2
+	  removeNamedItemNS: function removeNamedItemNS(namespaceURI, localName) {
+	    var attr = this.getNamedItemNS(namespaceURI, localName);
 
-	        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();
-	        }
-	    }
+	    _removeNamedNode(this._ownerElement, this, attr);
 
+	    return attr;
+	  },
+	  getNamedItemNS: function getNamedItemNS(namespaceURI, localName) {
+	    var i = this.length;
 
-	    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();
-	        }
+	    while (i--) {
+	      var node = this[i];
 
-	        if (!context.container().select('.form-field-description').empty()) {
-	            return continueTo(describePlayground);
-	        }
+	      if (node.localName == localName && node.namespaceURI == namespaceURI) {
+	        return node;
+	      }
+	    }
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    return null;
+	  }
+	};
+	/**
+	 * @see http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490
+	 */
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	function DOMImplementation(
+	/* Object */
+	features) {
+	  this._features = {};
 
-	            // 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 (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;
 
-	            // 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 (doctype) {
+	      doc.appendChild(doctype);
+	    }
 
-	            timeout(function() {
-	                reveal('.more-fields .combobox-input',
-	                    helpString('intro.areas.add_field', {
-	                        name: nameField.label(),
-	                        description: descriptionField.label()
-	                    }),
-	                    { duration: 300 }
-	                );
+	    if (qualifiedName) {
+	      var root = doc.createElementNS(namespaceURI, qualifiedName);
+	      doc.appendChild(root);
+	    }
 
-	                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
+	    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;
 
-	        }, 400);  // after editor pane visible
+	    return node;
+	  }
+	};
+	/**
+	 * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
+	 */
 
-	        context.on('exit.intro', function() {
-	            return continueTo(searchPresets);
-	        });
+	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);
 
-	        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 (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;
 
+	    while (child) {
+	      var next = child.nextSibling;
 
-	    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 (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;
 
-	        if (!context.container().select('.form-field-description').empty()) {
-	            return continueTo(describePlayground);
-	        }
+	    while (el) {
+	      var map = el._nsMap; //console.dir(map)
 
-	        // Make sure combobox is ready..
-	        if (context.container().select('div.combobox').empty()) {
-	            return continueTo(clickAddField);
+	      if (map) {
+	        for (var n in map) {
+	          if (map[n] == namespaceURI) {
+	            return n;
+	          }
 	        }
-	        // 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 }
-	        );
+	      el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
+	    }
 
-	        context.on('exit.intro', function() {
-	            return continueTo(searchPresets);
-	        });
+	    return null;
+	  },
+	  // Introduced in DOM Level 3:
+	  lookupNamespaceURI: function lookupNamespaceURI(prefix) {
+	    var el = this;
+
+	    while (el) {
+	      var map = el._nsMap; //console.dir(map)
 
-	        function continueTo(nextStep) {
-	            if (watcher) { window.clearInterval(watcher); }
-	            context.on('exit.intro', null);
-	            nextStep();
+	      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 isDefaultNamespace(namespaceURI) {
+	    var prefix = this.lookupPrefix(namespaceURI);
+	    return prefix == null;
+	  }
+	};
 
-	    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();
-	        }
+	function _xmlEncoder(c) {
+	  return c == '<' && '&lt;' || c == '>' && '&gt;' || c == '&' && '&amp;' || c == '"' && '&quot;' || '&#' + c.charCodeAt() + ';';
+	}
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	copy$1(NodeType, Node);
+	copy$1(NodeType, Node.prototype);
+	/**
+	 * @param callback return true for continue,false for break
+	 * @return boolean true: break visit;
+	 */
 
-	        if (context.container().select('.form-field-description').empty()) {
-	            return continueTo(retryChooseDescription);
-	        }
+	function _visitNode(node, callback) {
+	  if (callback(node)) {
+	    return true;
+	  }
 
-	        context.on('exit.intro', function() {
-	            continueTo(play);
-	        });
+	  if (node = node.firstChild) {
+	    do {
+	      if (_visitNode(node, callback)) {
+	        return true;
+	      }
+	    } while (node = node.nextSibling);
+	  }
+	}
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.areas.describe_playground', { button: icon('#iD-icon-close', 'pre-text') }),
-	            { duration: 300 }
-	        );
+	function Document() {}
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	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 retryChooseDescription() {
-	        if (!_areaID || !context.hasEntity(_areaID)) {
-	            return addArea();
-	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-	            return searchPresets();
-	        }
+	function _onRemoveAttribute(doc, el, newAttr, remove) {
+	  doc && doc._inc++;
+	  var ns = newAttr.namespaceURI;
 
-	        // reset pane, in case user happened to change it..
-	        context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+	  if (ns == 'http://www.w3.org/2000/xmlns/') {
+	    //update namespace
+	    delete el._nsMap[newAttr.prefix ? newAttr.localName : ''];
+	  }
+	}
 
-	        reveal('.entity-editor-pane',
-	            helpString('intro.areas.retry_add_field', { field: descriptionField.label() }), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(clickAddField); }
-	        });
+	function _onUpdateChild(doc, el, newChild) {
+	  if (doc && doc._inc) {
+	    doc._inc++; //update childNodes
 
-	        context.on('exit.intro', function() {
-	            return continueTo(searchPresets);
-	        });
+	    var cs = el.childNodes;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.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 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'); }
-	            }
-	        );
+	      cs.length = i;
 	    }
+	  }
+	}
+	/**
+	 * attributes;
+	 * children;
+	 * 
+	 * writeable properties:
+	 * nodeValue,Attr:value,CharacterData:data
+	 * prefix
+	 */
 
 
-	    chapter.enter = function() {
-	        addArea();
-	    };
-
-
-	    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 _removeChild(parentNode, child) {
+	  var previous = child.previousSibling;
+	  var next = child.nextSibling;
 
+	  if (previous) {
+	    previous.nextSibling = next;
+	  } else {
+	    parentNode.firstChild = next;
+	  }
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	  if (next) {
+	    next.previousSibling = previous;
+	  } else {
+	    parentNode.lastChild = previous;
+	  }
 
+	  _onUpdateChild(parentNode.ownerDocument, parentNode);
 
-	    return utilRebind(chapter, dispatch$1, 'on');
+	  return child;
 	}
+	/**
+	 * preformance key(refChild == null)
+	 */
 
-	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 _insertBefore(parentNode, newChild, nextChild) {
+	  var cp = newChild.parentNode;
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
-	    }
+	  if (cp) {
+	    cp.removeChild(newChild); //remove and update
+	  }
 
+	  if (newChild.nodeType === DOCUMENT_FRAGMENT_NODE) {
+	    var newFirst = newChild.firstChild;
 
-	    function eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
+	    if (newFirst == null) {
+	      return newChild;
 	    }
 
+	    var newLast = newChild.lastChild;
+	  } else {
+	    newFirst = newLast = newChild;
+	  }
 
-	    function addLine() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('initial');
-
-	        var msec = transitionTime(tulipRoadStart, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
-
-	        timeout(function() {
-	            var tooltip = reveal('button.add-line',
-	                helpString('intro.lines.add_line'));
-
-	            tooltip.selectAll('.popover-inner')
-	                .insert('svg', 'span')
-	                .attr('class', 'tooltip-illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-graphic-lines');
+	  var pre = nextChild ? nextChild.previousSibling : parentNode.lastChild;
+	  newFirst.previousSibling = pre;
+	  newLast.nextSibling = nextChild;
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-line') { return; }
-	                continueTo(startLine);
-	            });
-	        }, msec + 100);
+	  if (pre) {
+	    pre.nextSibling = newFirst;
+	  } else {
+	    parentNode.firstChild = newFirst;
+	  }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	  if (nextChild == null) {
+	    parentNode.lastChild = newLast;
+	  } else {
+	    nextChild.previousSibling = newLast;
+	  }
 
+	  do {
+	    newFirst.parentNode = parentNode;
+	  } while (newFirst !== newLast && (newFirst = newFirst.nextSibling));
 
-	    function startLine() {
-	        if (context.mode().id !== 'add-line') { return chapter.restart(); }
+	  _onUpdateChild(parentNode.ownerDocument || parentNode, parentNode); //console.log(parentNode.lastChild.nextSibling == null)
 
-	        _tulipRoadID = null;
 
-	        var padding = 70 * Math.pow(2, context.map().zoom() - 18);
-	        var box = pad(tulipRoadStart, padding, context);
-	        box.height = box.height + 100;
+	  if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
+	    newChild.firstChild = newChild.lastChild = null;
+	  }
 
-	        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);
+	  return newChild;
+	}
 
-	        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 });
-	        });
+	function _appendSingleChild(parentNode, newChild) {
+	  var cp = newChild.parentNode;
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'draw-line') { return chapter.restart(); }
-	            continueTo(drawLine);
-	        });
+	  if (cp) {
+	    var pre = parentNode.lastChild;
+	    cp.removeChild(newChild); //remove and update
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	    var pre = parentNode.lastChild;
+	  }
 
+	  var pre = parentNode.lastChild;
+	  newChild.parentNode = parentNode;
+	  newChild.previousSibling = pre;
+	  newChild.nextSibling = null;
 
-	    function drawLine() {
-	        if (context.mode().id !== 'draw-line') { return chapter.restart(); }
+	  if (pre) {
+	    pre.nextSibling = newChild;
+	  } else {
+	    parentNode.firstChild = newChild;
+	  }
 
-	        _tulipRoadID = context.mode().selectedIDs()[0];
-	        context.map().centerEase(tulipRoadMidpoint, 500);
+	  parentNode.lastChild = newChild;
 
-	        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') })
-	            );
+	  _onUpdateChild(parentNode.ownerDocument, parentNode, newChild);
 
-	            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..
+	  return newChild; //console.log("__aa",parentNode.lastChild.nextSibling == null)
+	}
 
-	        context.history().on('change.intro', function() {
-	            if (isLineConnected()) {
-	                continueTo(continueLine);
-	            }
-	        });
+	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;
+	      }
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-line') {
-	                return;
-	            } else if (mode.id === 'select') {
-	                continueTo(retryIntersect);
-	                return;
-	            } else {
-	                return chapter.restart();
-	            }
-	        });
+	      return newChild;
+	    }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    if (this.documentElement == null && newChild.nodeType == ELEMENT_NODE) {
+	      this.documentElement = newChild;
 	    }
 
+	    return _insertBefore(this, newChild, refChild), newChild.ownerDocument = this, newChild;
+	  },
+	  removeChild: function removeChild(oldChild) {
+	    if (this.documentElement == oldChild) {
+	      this.documentElement = null;
+	    }
 
-	    function isLineConnected() {
-	        var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
-	        if (!entity) { return false; }
+	    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;
+	        }
+	      }
+	    });
 
-	        var drawNodes = context.graph().childNodes(entity);
-	        return drawNodes.some(function(node) {
-	            return context.graph().parentWays(node).some(function(parent) {
-	                return parent.id === flowerRoadID;
-	            });
-	        });
+	    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;
 	    }
 
+	    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;
+	    }
 
-	    function retryIntersect() {
-	        select(window).on('pointerdown.intro mousedown.intro', eventCancel, true);
+	    return node;
+	  }
+	};
 
-	        var box = pad(tulipRoadIntersection, 80, context);
-	        reveal(box,
-	            helpString('intro.lines.retry_intersect', { name: _t('intro.graph.name.flower-street') })
-	        );
+	_extends(Document, Node);
 
-	        timeout(chapter.restart, 3000);
+	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);
+	        }
+	      });
 
-	    function continueLine() {
-	        if (context.mode().id !== 'draw-line') { return chapter.restart(); }
-	        var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
-	        if (!entity) { return chapter.restart(); }
+	      return ls;
+	    });
+	  },
+	  getElementsByTagNameNS: function getElementsByTagNameNS(namespaceURI, localName) {
+	    return new LiveNodeList(this, function (base) {
+	      var ls = [];
 
-	        context.map().centerEase(tulipRoadIntersection, 500);
+	      _visitNode(base, function (node) {
+	        if (node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)) {
+	          ls.push(node);
+	        }
+	      });
 
-	        var continueLineText = helpString('intro.lines.continue_line') + '{br}' +
-	            helpString('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.lines.finish_road');
+	      return ls;
+	    });
+	  }
+	};
+	Document.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;
+	Document.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;
 
-	        reveal('.surface', continueLineText);
+	_extends(Element, Node);
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'draw-line')
-	                { return; }
-	            else if (mode.id === 'select')
-	                { return continueTo(chooseCategoryRoad); }
-	            else
-	                { return chapter.restart(); }
-	        });
+	function Attr() {}
+	Attr.prototype.nodeType = ATTRIBUTE_NODE;
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	_extends(Attr, Node);
 
+	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 chooseCategoryRoad() {
-	        if (context.mode().id !== 'select') { return chapter.restart(); }
+	_extends(CharacterData, Node);
 
-	        context.on('exit.intro', function() {
-	            return chapter.restart();
-	        });
+	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);
 
-	        var button = context.container().select('.preset-category-road_minor .preset-list-button');
-	        if (button.empty()) { return chapter.restart(); }
+	    if (this.parentNode) {
+	      this.parentNode.insertBefore(newNode, this.nextSibling);
+	    }
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	    return newNode;
+	  }
+	};
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	_extends(Text, CharacterData);
 
-	            reveal(button.node(),
-	                helpString('intro.lines.choose_category_road', { category: roadCategory.name() })
-	            );
+	function Comment() {}
+	Comment.prototype = {
+	  nodeName: "#comment",
+	  nodeType: COMMENT_NODE
+	};
 
-	            button.on('click.intro', function() {
-	                continueTo(choosePresetResidential);
-	            });
+	_extends(Comment, CharacterData);
 
-	        }, 400);  // after editor pane visible
+	function CDATASection() {}
+	CDATASection.prototype = {
+	  nodeName: "#cdata-section",
+	  nodeType: CDATA_SECTION_NODE
+	};
 
-	        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();
-	        }
-	    }
+	_extends(CDATASection, CharacterData);
 
+	function DocumentType() {}
+	DocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;
 
-	    function choosePresetResidential() {
-	        if (context.mode().id !== 'select') { return chapter.restart(); }
+	_extends(DocumentType, Node);
 
-	        context.on('exit.intro', function() {
-	            return chapter.restart();
-	        });
+	function Notation() {}
+	Notation.prototype.nodeType = NOTATION_NODE;
 
-	        var subgrid = context.container().select('.preset-category-road_minor .subgrid');
-	        if (subgrid.empty()) { return chapter.restart(); }
+	_extends(Notation, Node);
 
-	        subgrid.selectAll(':not(.preset-highway-residential) .preset-list-button')
-	            .on('click.intro', function() {
-	                continueTo(retryPresetResidential);
-	            });
+	function Entity() {}
+	Entity.prototype.nodeType = ENTITY_NODE;
 
-	        subgrid.selectAll('.preset-highway-residential .preset-list-button')
-	            .on('click.intro', function() {
-	                continueTo(nameRoad);
-	            });
+	_extends(Entity, Node);
 
-	        timeout(function() {
-	            reveal(subgrid.node(),
-	                helpString('intro.lines.choose_preset_residential', { preset: residentialPreset.name() }),
-	                { tooltipBox: '.preset-highway-residential .preset-list-button', duration: 300 }
-	            );
-	        }, 300);
+	function EntityReference() {}
+	EntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;
 
-	        function continueTo(nextStep) {
-	            context.container().select('.preset-list-button').on('click.intro', null);
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	_extends(EntityReference, Node);
 
+	function DocumentFragment() {}
+	DocumentFragment.prototype.nodeName = "#document-fragment";
+	DocumentFragment.prototype.nodeType = DOCUMENT_FRAGMENT_NODE;
 
-	    // selected wrong road type
-	    function retryPresetResidential() {
-	        if (context.mode().id !== 'select') { return chapter.restart(); }
+	_extends(DocumentFragment, Node);
 
-	        context.on('exit.intro', function() {
-	            return chapter.restart();
-	        });
+	function ProcessingInstruction() {}
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	ProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;
 
-	        timeout(function() {
-	            var button = context.container().select('.entity-editor-pane .preset-list-button');
+	_extends(ProcessingInstruction, Node);
 
-	            reveal(button.node(),
-	                helpString('intro.lines.retry_preset_residential', { preset: residentialPreset.name() })
-	            );
+	function XMLSerializer$1() {}
 
-	            button.on('click.intro', function() {
-	                continueTo(chooseCategoryRoad);
-	            });
+	XMLSerializer$1.prototype.serializeToString = function (node, isHtml, nodeFilter) {
+	  return nodeSerializeToString.call(node, isHtml, nodeFilter);
+	};
 
-	        }, 500);
+	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('exit.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 nameRoad() {
-	        context.on('exit.intro', function() {
-	            continueTo(didNameRoad);
-	        });
+	  return buf.join('');
+	}
 
-	        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 needNamespaceDefine(node, isHTML, visibleNamespaces) {
+	  var prefix = node.prefix || '';
+	  var uri = node.namespaceURI;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	  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;
+	  }
 
-	    function didNameRoad() {
-	        context.history().checkpoint('doneAddLine');
+	  var i = visibleNamespaces.length; //console.log('@@@@',node.tagName,prefix,uri,visibleNamespaces)
 
-	        timeout(function() {
-	            reveal('.surface', helpString('intro.lines.did_name_road'), {
-	                buttonText: _t('intro.ok'),
-	                buttonCallback: function() { continueTo(updateLine); }
-	            });
-	        }, 500);
+	  while (i--) {
+	    var ns = visibleNamespaces[i]; // get namespace prefix
+	    //console.log(node.nodeType,node.tagName,ns.prefix,prefix)
 
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
+	    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)
 
 
-	    function updateLine() {
-	        context.history().reset('doneAddLine');
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return chapter.restart();
-	        }
+	  return true;
+	}
 
-	        var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
+	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);
 
-	        timeout(function() {
-	            var padding = 250 * Math.pow(2, context.map().zoom() - 19);
-	            var box = pad(woodRoadDragMidpoint, padding, context);
-	            var advance = function() { continueTo(addNode); };
+	  }
 
-	            reveal(box, helpString('intro.lines.update_line'),
-	                { buttonText: _t('intro.ok'), buttonCallback: advance }
-	            );
+	  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);
 
-	            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);
+	      for (var i = 0; i < len; i++) {
+	        // add namespaces for attributes
+	        var attr = attrs.item(i);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
+	        if (attr.prefix == 'xmlns') {
+	          visibleNamespaces.push({
+	            prefix: attr.localName,
+	            namespace: attr.value
+	          });
+	        } else if (attr.nodeName == 'xmlns') {
+	          visibleNamespaces.push({
+	            prefix: '',
+	            namespace: attr.value
+	          });
 	        }
-	    }
-
+	      }
 
-	    function addNode() {
-	        context.history().reset('doneAddLine');
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return chapter.restart();
+	      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
+	          });
 	        }
 
-	        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);
+	        serializeToString(attr, buf, isHTML, nodeFilter, visibleNamespaces);
+	      } // add namespace for current node		
 
-	        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);
-	            }
-	            if (changed.created().length === 1) {
-	                timeout(function() { continueTo(startDragEndpoint); }, 500);
-	            }
+	      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
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') {
-	                continueTo(updateLine);
+	        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.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('enter.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 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);
 
-	        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 });
+	      return;
 
-	            var entity = context.entity(woodRoadEndID);
-	            if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
-	                continueTo(finishDragEndpoint);
-	            }
-	        });
+	    case DOCUMENT_NODE:
+	    case DOCUMENT_FRAGMENT_NODE:
+	      var child = node.firstChild;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	      while (child) {
+	        serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
+	        child = child.nextSibling;
+	      }
 
+	      return;
 
-	    function finishDragEndpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
+	    case ATTRIBUTE_NODE:
+	      return buf.push(' ', node.name, '="', node.value.replace(/[<&"]/g, _xmlEncoder), '"');
 
-	        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);
+	    case TEXT_NODE:
+	      return buf.push(node.data.replace(/[<&]/g, _xmlEncoder));
 
-	        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 });
+	    case CDATA_SECTION_NODE:
+	      return buf.push('<![CDATA[', node.data, ']]>');
 
-	            var entity = context.entity(woodRoadEndID);
-	            if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
-	                continueTo(startDragEndpoint);
-	            }
-	        });
+	    case COMMENT_NODE:
+	      return buf.push("<!--", node.data, "-->");
 
-	        context.on('enter.intro', function() {
-	            continueTo(startDragMidpoint);
-	        });
+	    case DOCUMENT_TYPE_NODE:
+	      var pubid = node.publicId;
+	      var sysid = node.systemId;
+	      buf.push('<!DOCTYPE ', node.name);
+
+	      if (pubid) {
+	        buf.push(' PUBLIC "', pubid);
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
+	        if (sysid && sysid != '.') {
+	          buf.push('" "', sysid);
 	        }
-	    }
 
+	        buf.push('">');
+	      } else if (sysid && sysid != '.') {
+	        buf.push(' SYSTEM "', sysid, '">');
+	      } else {
+	        var sub = node.internalSubset;
 
-	    function startDragMidpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
-	        if (context.selectedIDs().indexOf(woodRoadID) === -1) {
-	            context.enter(modeSelect(context, [woodRoadID]));
+	        if (sub) {
+	          buf.push(" [", sub, "]");
 	        }
 
-	        var padding = 80 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragMidpoint, padding, context);
-	        reveal(box, helpString('intro.lines.start_drag_midpoint'));
+	        buf.push(">");
+	      }
 
-	        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 });
-	        });
+	      return;
 
-	        context.history().on('change.intro', function(changed) {
-	            if (changed.created().length === 1) {
-	                continueTo(continueDragMidpoint);
-	            }
-	        });
+	    case PROCESSING_INSTRUCTION_NODE:
+	      return buf.push("<?", node.target, " ", node.data, "?>");
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id !== 'select') {
-	                // keep Wood Road selected so midpoint triangles are drawn..
-	                context.enter(modeSelect(context, [woodRoadID]));
-	            }
-	        });
+	    case ENTITY_REFERENCE_NODE:
+	      return buf.push('&', node.nodeName, ';');
+	    //case ENTITY_NODE:
+	    //case NOTATION_NODE:
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	    default:
+	      buf.push('??', node.nodeName);
+	  }
+	}
 
+	function _importNode(doc, node, deep) {
+	  var node2;
 
-	    function continueDragMidpoint() {
-	        if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-	            return continueTo(updateLine);
-	        }
+	  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));
+	    //}
 
-	        var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-	        var box = pad(woodRoadDragEndpoint, padding, context);
-	        box.height += 400;
+	    case DOCUMENT_FRAGMENT_NODE:
+	      break;
 
-	        var advance = function() {
-	            context.history().checkpoint('doneUpdateLine');
-	            continueTo(deleteLines);
-	        };
+	    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;
+	  }
 
-	        reveal(box, helpString('intro.lines.continue_drag_midpoint'),
-	            { buttonText: _t('intro.ok'), buttonCallback: advance }
-	        );
+	  if (!node2) {
+	    node2 = node.cloneNode(false); //false
+	  }
 
-	        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 }
-	            );
-	        });
+	  node2.ownerDocument = doc;
+	  node2.parentNode = null;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
-	    }
+	  if (deep) {
+	    var child = node.firstChild;
 
+	    while (child) {
+	      node2.appendChild(_importNode(doc, child, deep));
+	      child = child.nextSibling;
+	    }
+	  }
 
-	    function deleteLines() {
-	        context.history().reset('doneUpdateLine');
-	        context.enter(modeBrowse(context));
+	  return node2;
+	} //
+	//var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,
+	//					attributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};
 
-	        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)
-	            });
+	function _cloneNode(doc, node, deep) {
+	  var node2 = new node.constructor();
 
-	        }, msec + 100);
+	  for (var n in node) {
+	    var v = node[n];
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    if (_typeof(v) != 'object') {
+	      if (v != node2[n]) {
+	        node2[n] = v;
+	      }
 	    }
+	  }
 
+	  if (node.childNodes) {
+	    node2.childNodes = new NodeList();
+	  }
 
-	    function rightClickIntersection() {
-	        context.history().reset('doneUpdateLine');
-	        context.enter(modeBrowse(context));
-
-	        context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
-
-	        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'));
-
-	        timeout(function() {
-	            var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-	            var box = pad(eleventhAvenueEnd, padding, context);
-	            reveal(box, rightClickString);
+	  node2.ownerDocument = doc;
 
-	            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 }
-	                );
-	            });
+	  switch (node2.nodeType) {
+	    case ELEMENT_NODE:
+	      var attrs = node.attributes;
+	      var attrs2 = node2.attributes = new NamedNodeMap();
+	      var len = attrs.length;
+	      attrs2._ownerElement = node2;
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'select') { return; }
-	                var ids = context.selectedIDs();
-	                if (ids.length !== 1 || ids[0] !== eleventhAvenueEndID) { return; }
+	      for (var i = 0; i < len; i++) {
+	        node2.setAttributeNode(_cloneNode(doc, attrs.item(i), true));
+	      }
 
-	                timeout(function() {
-	                    var node = selectMenuItem(context, 'split').node();
-	                    if (!node) { return; }
-	                    continueTo(splitIntersection);
-	                }, 50);  // after menu visible
-	            });
+	      break;
 
-	            context.history().on('change.intro', function() {
-	                timeout(function() {
-	                    continueTo(deleteLines);
-	                }, 300);  // after any transition (e.g. if user deleted intersection)
-	            });
+	    case ATTRIBUTE_NODE:
+	      deep = true;
+	  }
 
-	        }, 600);
+	  if (deep) {
+	    var child = node.firstChild;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    while (child) {
+	      node2.appendChild(_cloneNode(doc, child, deep));
+	      child = child.nextSibling;
 	    }
+	  }
 
+	  return node2;
+	}
 
-	    function splitIntersection() {
-	        if (!context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(deleteLines);
-	        }
-
-	        var node = selectMenuItem(context, 'split').node();
-	        if (!node) { return continueTo(rightClickIntersection); }
+	function __set__(object, key, value) {
+	  object[key] = value;
+	} //do dynamic
 
-	        var wasChanged = false;
-	        _washingtonSegmentID = null;
 
-	        reveal('.edit-menu', helpString('intro.lines.split_intersection',
-	            { street: _t('intro.graph.name.washington-street') }),
-	            { padding: 50 }
-	        );
+	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.map().on('move.intro drawn.intro', function() {
-	            var node = selectMenuItem(context, 'split').node();
-	            if (!wasChanged && !node) { return continueTo(rightClickIntersection); }
+	          while (node) {
+	            if (node.nodeType !== 7 && node.nodeType !== 8) {
+	              buf.push(getTextContent(node));
+	            }
 
-	            reveal('.edit-menu', helpString('intro.lines.split_intersection',
-	                { street: _t('intro.graph.name.washington-street') }),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	            node = node.nextSibling;
+	          }
 
-	        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)
-	        });
+	          return buf.join('');
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	        default:
+	          return node.nodeValue;
+	      }
+	    };
 
+	    Object.defineProperty(LiveNodeList.prototype, 'length', {
+	      get: function get() {
+	        _updateLiveList(this);
 
-	    function retrySplit() {
-	        context.enter(modeBrowse(context));
-	        context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
-	        var advance = function() { continueTo(rightClickIntersection); };
+	        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);
+	            }
 
-	        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 }
-	        );
+	            if (data || String(data)) {
+	              this.appendChild(this.ownerDocument.createTextNode(data));
+	            }
 
-	        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 }
-	            );
-	        });
+	            break;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
+	          default:
+	            //TODO:
+	            this.data = data;
+	            this.value = data;
+	            this.nodeValue = data;
 	        }
-	    }
-
+	      }
+	    });
 
-	    function didSplit() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
+	    __set__ = function __set__(object, key, value) {
+	      //console.log(value)
+	      object['$$' + key] = value;
+	    };
+	  }
+	} catch (e) {//ie8
+	} //if(typeof require == 'function'){
 
-	        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, helpString(string, { street1: street, street2: street }),
-	            { duration: 500 }
-	        );
+	var DOMImplementation_1 = DOMImplementation;
+	var XMLSerializer_1 = XMLSerializer$1; //}
 
-	        timeout(function() {
-	            context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	var dom = {
+	  DOMImplementation: DOMImplementation_1,
+	  XMLSerializer: XMLSerializer_1
+	};
 
-	            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
+	var domParser = createCommonjsModule(function (module, exports) {
+	  function DOMParser(options) {
+	    this.options = options || {
+	      locator: {}
+	    };
+	  }
 
-	        context.on('enter.intro', function() {
-	            var ids = context.selectedIDs();
-	            if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
-	                continueTo(multiSelect);
-	            }
-	        });
+	  DOMParser.prototype.parseFromString = function (source, mimeType) {
+	    var options = this.options;
+	    var sax = new XMLReader();
+	    var domBuilder = options.domBuilder || new DOMHandler(); //contentHandler and LexicalHandler
 
-	        context.history().on('change.intro', function() {
-	            if (!_washingtonSegmentID ||
-	                !context.hasEntity(_washingtonSegmentID) ||
-	                !context.hasEntity(washingtonStreetID) ||
-	                !context.hasEntity(twelfthAvenueID) ||
-	                !context.hasEntity(eleventhAvenueEndID)) {
-	                return continueTo(rightClickIntersection);
-	            }
-	        });
+	    var errorHandler = options.errorHandler;
+	    var locator = options.locator;
+	    var defaultNSMap = options.xmlns || {};
+	    var entityMap = {
+	      'lt': '<',
+	      'gt': '>',
+	      'amp': '&',
+	      'quot': '"',
+	      'apos': "'"
+	    };
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    if (locator) {
+	      domBuilder.setDocumentLocator(locator);
 	    }
 
+	    sax.errorHandler = buildErrorHandler(errorHandler, domBuilder, locator);
+	    sax.domBuilder = options.domBuilder || domBuilder;
 
-	    function multiSelect() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
+	    if (/\/x?html?$/.test(mimeType)) {
+	      entityMap.nbsp = '\xa0';
+	      entityMap.copy = '\xa9';
+	      defaultNSMap[''] = 'http://www.w3.org/1999/xhtml';
+	    }
 
-	        var ids = context.selectedIDs();
-	        var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
-	        var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
+	    defaultNSMap.xml = defaultNSMap.xml || 'http://www.w3.org/XML/1998/namespace';
 
-	        if (hasWashington && hasTwelfth) {
-	            return continueTo(multiRightClick);
-	        } else if (!hasWashington && !hasTwelfth) {
-	            return continueTo(didSplit);
-	        }
+	    if (source) {
+	      sax.parse(source, defaultNSMap, entityMap);
+	    } else {
+	      sax.errorHandler.error("invalid doc source");
+	    }
 
-	        context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	    return domBuilder.doc;
+	  };
 
-	        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;
-	            }
+	  function buildErrorHandler(errorImpl, domBuilder, locator) {
+	    if (!errorImpl) {
+	      if (domBuilder instanceof DOMHandler) {
+	        return domBuilder;
+	      }
 
-	            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;
-	                }
+	      errorImpl = domBuilder;
+	    }
 
-	                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 }
-	                );
-	            });
+	    var errorHandler = {};
+	    var isCallback = errorImpl instanceof Function;
+	    locator = locator || {};
 
-	            context.on('enter.intro', function() {
-	                continueTo(multiSelect);
-	            });
+	    function build(key) {
+	      var fn = errorImpl[key];
 
-	            context.history().on('change.intro', function() {
-	                if (!_washingtonSegmentID ||
-	                    !context.hasEntity(_washingtonSegmentID) ||
-	                    !context.hasEntity(washingtonStreetID) ||
-	                    !context.hasEntity(twelfthAvenueID) ||
-	                    !context.hasEntity(eleventhAvenueEndID)) {
-	                    return continueTo(rightClickIntersection);
-	                }
-	            });
-	        }, 600);
+	      if (!fn && isCallback) {
+	        fn = errorImpl.length == 2 ? function (msg) {
+	          errorImpl(key, msg);
+	        } : errorImpl;
+	      }
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	      errorHandler[key] = fn && function (msg) {
+	        fn('[xmldom ' + key + ']\t' + msg + _locator(locator));
+	      } || function () {};
 	    }
 
+	    build('warning');
+	    build('error');
+	    build('fatalError');
+	    return errorHandler;
+	  } //console.log('#\n\n\n\n\n\n\n####')
 
-	    function multiRightClick() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
-	        }
+	  /**
+	   * +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
+	   */
 
-	        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 DOMHandler() {
+	    this.cdata = false;
+	  }
 
-	        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 });
-	        });
+	  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
+	   */
 
-	        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
-	        });
 
-	        context.history().on('change.intro', function() {
-	            if (!_washingtonSegmentID ||
-	                !context.hasEntity(_washingtonSegmentID) ||
-	                !context.hasEntity(washingtonStreetID) ||
-	                !context.hasEntity(twelfthAvenueID) ||
-	                !context.hasEntity(eleventhAvenueEndID)) {
-	                return continueTo(rightClickIntersection);
-	            }
-	        });
+	  DOMHandler.prototype = {
+	    startDocument: function startDocument() {
+	      this.doc = new DOMImplementation().createDocument(null, null, null);
 
-	        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();
+	      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 multiDelete() {
-	        if (!_washingtonSegmentID ||
-	            !context.hasEntity(_washingtonSegmentID) ||
-	            !context.hasEntity(washingtonStreetID) ||
-	            !context.hasEntity(twelfthAvenueID) ||
-	            !context.hasEntity(eleventhAvenueEndID)) {
-	            return continueTo(rightClickIntersection);
+	        if (this.currentElement) {
+	          this.currentElement.appendChild(charNode);
+	        } else if (/^\s*$/.test(chars)) {
+	          this.doc.appendChild(charNode); //process xml
 	        }
 
-	        var node = selectMenuItem(context, 'delete').node();
-	        if (!node) { return continueTo(multiRightClick); }
+	        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;
 
-	        reveal('.edit-menu',
-	            helpString('intro.lines.multi_delete'),
-	            { padding: 50 }
-	        );
+	      if (impl && impl.createDocumentType) {
+	        var dt = impl.createDocumentType(name, publicId, systemId);
+	        this.locator && position(this.locator, dt);
+	        appendElement(this, dt);
+	      }
+	    },
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            reveal('.edit-menu',
-	                helpString('intro.lines.multi_delete'),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	    /**
+	     * @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;
+	    }
+	  };
 
-	        context.on('exit.intro', function() {
-	            if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-	                return continueTo(multiSelect);  // left select mode but roads still exist
-	            }
-	        });
+	  function _locator(l) {
+	    if (l) {
+	      return '\n@' + (l.systemId || '') + '#[line:' + l.lineNumber + ',col:' + l.columnNumber + ']';
+	    }
+	  }
 
-	        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 _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 continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('exit.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	      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) {};
+	   */
 
 
-	    function retryDelete() {
-	        context.enter(modeBrowse(context));
-
-	        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); }
-	        });
+	  "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 */
 
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
+	  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'){
 
 
-	    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'); }
-	            }
-	        );
-	   }
+	  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 () {
 
-	    chapter.enter = function() {
-	        addLine();
-	    };
+	    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;
 
-	    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);
-	    };
+	      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
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
 
+	    function get(x, y) {
+	      return x.getElementsByTagName(y);
+	    }
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	    function attr(x, y) {
+	      return x.getAttribute(y);
+	    }
 
-	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'
-	    };
+	    function attrf(x, y) {
+	      return parseFloat(attr(x, y));
+	    } // one Y child of X, if any, otherwise null
 
 
-	    function timeout(f, t) {
-	        timeouts.push(window.setTimeout(f, t));
-	    }
+	    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 eventCancel() {
-	        event.stopPropagation();
-	        event.preventDefault();
-	    }
+	    function norm(el) {
+	      if (el.normalize) {
+	        el.normalize();
+	      }
 
+	      return el;
+	    } // cast array x into numbers
 
-	    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 numarray(x) {
+	      for (var j = 0, o = []; j < x.length; j++) {
+	        o[j] = parseFloat(x[j]);
+	      }
 
-	    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);
-	    }
+	      return o;
+	    } // get the content of a text node, if any
 
 
-	    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);
+	    function nodeVal(x) {
+	      if (x) {
+	        norm(x);
+	      }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	      return x && x.textContent || '';
+	    } // get the contents of multiple text nodes, if present
 
 
-	    function startHouse() {
-	        if (context.mode().id !== 'add-area') {
-	            return continueTo(addHouse);
-	        }
+	    function getMulti(x, ys) {
+	      var o = {},
+	          n,
+	          k;
 
-	        _houseID = null;
-	        context.map().zoomEase(20, 500);
+	      for (k = 0; k < ys.length; k++) {
+	        n = get1(x, ys[k]);
+	        if (n) o[ys[k]] = nodeVal(n);
+	      }
 
-	        timeout(function() {
-	            var startString = helpString('intro.buildings.start_building') +
-	                helpString('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-	            revealHouse(house, startString);
+	      return o;
+	    } // add properties of Y to X, overwriting if present in both
 
-	            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);
-	            });
+	    function extend(x, y) {
+	      for (var k in y) {
+	        x[k] = y[k];
+	      }
+	    } // get one coordinate from a coordinate array, if any
 
-	        }, 550);  // after easing
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	    function coord1(v) {
+	      return numarray(v.replace(removeSpace, '').split(','));
+	    } // get all coordinates from a coordinate array as [[],[]]
 
 
-	    function continueHouse() {
-	        if (context.mode().id !== 'draw-area') {
-	            return continueTo(addHouse);
-	        }
+	    function coord(v) {
+	      var coords = v.replace(trimSpace, '').split(splitSpace),
+	          o = [];
 
-	        _houseID = null;
+	      for (var i = 0; i < coords.length; i++) {
+	        o.push(coord1(coords[i]));
+	      }
 
-	        var continueString = helpString('intro.buildings.continue_building') + '{br}' +
-	            helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.buildings.finish_building');
+	      return o;
+	    }
 
-	        revealHouse(house, continueString);
+	    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;
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            revealHouse(house, continueString, { duration: 0 });
-	        });
+	      if (ele) {
+	        e = parseFloat(nodeVal(ele));
 
-	        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);
-	                }
+	        if (!isNaN(e)) {
+	          ll.push(e);
+	        }
+	      }
 
-	            } else {
-	                return chapter.restart();
-	            }
-	        });
+	      return {
+	        coordinates: ll,
+	        time: time ? nodeVal(time) : null,
+	        heartRate: heartRate ? parseFloat(nodeVal(heartRate)) : null
+	      };
+	    } // create a new feature collection parent object
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
 
+	    function fc() {
+	      return {
+	        type: 'FeatureCollection',
+	        features: []
+	      };
+	    }
 
-	    function retryHouse() {
-	        var onClick = function() { continueTo(addHouse); };
+	    var serializer;
 
-	        revealHouse(house, helpString('intro.buildings.retry_building'),
-	            { buttonText: _t('intro.ok'), buttonCallback: onClick }
-	        );
+	    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();
+	    }
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            revealHouse(house, helpString('intro.buildings.retry_building'),
-	                { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-	            );
-	        });
+	    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
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            nextStep();
-	        }
+	      /* istanbul ignore next */
+	      if (str.xml !== undefined) return str.xml;
+	      return serializer.serializeToString(str);
 	    }
 
+	    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'));
+	          }
 
-	    function chooseCategoryBuilding() {
-	        if (!_houseID || !context.hasEntity(_houseID)) {
-	            return addHouse();
+	          styleMapIndex['#' + attr(styleMaps[l], 'id')] = pairsMap;
 	        }
-	        var ids = context.selectedIDs();
-	        if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-	            context.enter(modeSelect(context, [_houseID]));
+
+	        for (var j = 0; j < placemarks.length; j++) {
+	          gj.features = gj.features.concat(getPlacemark(placemarks[j]));
 	        }
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	        function kmlColor(v) {
+	          var color, opacity;
+	          v = v || '';
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	          if (v.substr(0, 1) === '#') {
+	            v = v.substr(1);
+	          }
 
-	            var button = context.container().select('.preset-category-building .preset-list-button');
+	          if (v.length === 6 || v.length === 3) {
+	            color = v;
+	          }
 
-	            reveal(button.node(),
-	                helpString('intro.buildings.choose_category_building', { category: buildingCatetory.name() })
-	            );
+	          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);
+	          }
 
-	            button.on('click.intro', function() {
-	                button.on('click.intro', null);
-	                continueTo(choosePresetHouse);
-	            });
+	          return [color, isNaN(opacity) ? undefined : opacity];
+	        }
 
-	        }, 400);  // after preset list pane visible..
+	        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');
 
-	        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);
-	            }
-	        });
+	          for (var i = 0; i < elems.length; i++) {
+	            coords.push(gxCoord(nodeVal(elems[i])));
+	          }
 
-	        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();
-	        }
-	    }
+	          var timeElems = get(root, 'when');
 
+	          for (var j = 0; j < timeElems.length; j++) {
+	            times.push(nodeVal(timeElems[j]));
+	          }
 
-	    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 {
+	            coords: coords,
+	            times: times
+	          };
 	        }
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	        function getGeometry(root) {
+	          var geomNode,
+	              geomNodes,
+	              i,
+	              j,
+	              k,
+	              geoms = [],
+	              coordTimes = [];
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	          if (get1(root, 'MultiGeometry')) {
+	            return getGeometry(get1(root, 'MultiGeometry'));
+	          }
 
-	            var button = context.container().select('.preset-building-house .preset-list-button');
+	          if (get1(root, 'MultiTrack')) {
+	            return getGeometry(get1(root, 'MultiTrack'));
+	          }
 
-	            reveal(button.node(),
-	                helpString('intro.buildings.choose_preset_house', { preset: housePreset.name() }),
-	                { duration: 300 }
-	            );
+	          if (get1(root, 'gx:MultiTrack')) {
+	            return getGeometry(get1(root, 'gx:MultiTrack'));
+	          }
 
-	            button.on('click.intro', function() {
-	                button.on('click.intro', null);
-	                continueTo(closeEditorHouse);
-	            });
+	          for (i = 0; i < geotypes.length; i++) {
+	            geomNodes = get(root, geotypes[i]);
 
-	        }, 400);  // after preset list pane visible..
+	            if (geomNodes) {
+	              for (j = 0; j < geomNodes.length; j++) {
+	                geomNode = geomNodes[j];
 
-	        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);
-	            }
-	        });
+	                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 = [];
 
-	        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();
-	        }
-	    }
+	                  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);
+	                }
+	              }
+	            }
+	          }
 
-	    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]));
+	          return {
+	            geoms: geoms,
+	            coordTimes: coordTimes
+	          };
 	        }
 
-	        context.history().checkpoint('hasHouse');
+	        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;
 
-	        context.on('exit.intro', function() {
-	            continueTo(rightClickHouse);
-	        });
+	          if (styleUrl) {
+	            if (styleUrl[0] !== '#') {
+	              styleUrl = '#' + styleUrl;
+	            }
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.buildings.close', { button: icon('#iD-icon-close', 'pre-text') })
-	            );
-	        }, 500);
+	            properties.styleUrl = styleUrl;
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	            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
 
-	    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
-	        });
+	            var style = styleByHash[properties.styleHash];
 
-	        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 (style) {
+	              if (!lineStyle) lineStyle = get1(style, 'LineStyle');
+	              if (!polyStyle) polyStyle = get1(style, 'PolyStyle');
+	            }
+	          }
 
-	        context.history().on('change.intro', function() {
-	            continueTo(rightClickHouse);
-	        });
+	          if (description) properties.description = description;
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
-	    }
+	          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'));
+	          }
 
-	    function clickSquare() {
-	        if (!_houseID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_houseID);
-	        if (!entity) { return continueTo(rightClickHouse); }
+	          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;
+	          }
 
-	        var node = selectMenuItem(context, 'orthogonalize').node();
-	        if (!node) { return continueTo(rightClickHouse); }
+	          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;
+	          }
 
-	        var wasChanged = false;
+	          if (extendedData) {
+	            var datas = get(extendedData, 'Data'),
+	                simpleDatas = get(extendedData, 'SimpleData');
 
-	        reveal('.edit-menu',
-	            helpString('intro.buildings.square_building'),
-	            { padding: 50 }
-	        );
+	            for (i = 0; i < datas.length; i++) {
+	              properties[datas[i].getAttribute('name')] = nodeVal(get1(datas[i], 'value'));
+	            }
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'browse') {
-	                continueTo(rightClickHouse);
-	            } else if (mode.id === 'move' || mode.id === 'rotate') {
-	                continueTo(retryClickSquare);
+	            for (i = 0; i < simpleDatas.length; i++) {
+	              properties[simpleDatas[i].getAttribute('name')] = nodeVal(simpleDatas[i]);
 	            }
-	        });
+	          }
 
-	        context.map().on('move.intro', function() {
-	            var node = selectMenuItem(context, 'orthogonalize').node();
-	            if (!wasChanged && !node) { return continueTo(rightClickHouse); }
+	          if (visibility) {
+	            properties.visibility = nodeVal(visibility);
+	          }
 
-	            reveal('.edit-menu',
-	                helpString('intro.buildings.square_building'),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	          if (geomsAndTimes.coordTimes.length) {
+	            properties.coordTimes = geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes;
+	          }
 
-	        context.history().on('change.intro', function() {
-	            wasChanged = true;
-	            context.history().on('change.intro', null);
+	          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];
+	        }
 
-	            // 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
-	        });
+	        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);
+	          }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
+	          return {
+	            line: line,
+	            times: times,
+	            heartRates: heartRates
+	          };
 	        }
-	    }
 
+	        function getTrack(node) {
+	          var segments = get(node, 'trkseg'),
+	              track = [],
+	              times = [],
+	              heartRates = [],
+	              line;
 
-	    function retryClickSquare() {
-	        context.enter(modeBrowse(context));
+	          for (var i = 0; i < segments.length; i++) {
+	            line = getPoints(segments[i], 'trkpt');
 
-	        revealHouse(house, helpString('intro.buildings.retry_square'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(rightClickHouse); }
-	        });
+	            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);
+	            }
+	          }
 
-	        function continueTo(nextStep) {
-	            nextStep();
+	          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 doneSquare() {
-	        context.history().checkpoint('doneSquare');
-
-	        revealHouse(house, helpString('intro.buildings.done_square'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(addTank); }
-	        });
 
-	        function continueTo(nextStep) {
-	            nextStep();
+	        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 addTank() {
-	        context.enter(modeBrowse(context));
-	        context.history().reset('doneSquare');
-	        _tankID = null;
+	        function getLineStyle(extensions) {
+	          var style = {};
 
-	        var msec = transitionTime(tank, context.map().center());
-	        if (msec) { reveal(null, null, { duration: 0 }); }
-	        context.map().centerZoomEase(tank, 19.5, msec);
+	          if (extensions) {
+	            var lineStyle = get1(extensions, 'line');
 
-	        timeout(function() {
-	            reveal('button.add-area',
-	                helpString('intro.buildings.add_tank')
-	            );
+	            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
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'add-area') { return; }
-	                continueTo(startTank);
-	            });
-	        }, msec + 100);
+	              if (!isNaN(width)) style['stroke-width'] = width * 96 / 25.4;
+	            }
+	          }
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            nextStep();
+	          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 startTank() {
-	        if (context.mode().id !== 'add-area') {
-	            return continueTo(addTank);
-	        }
+	          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);
+	          }
 
-	        _tankID = null;
+	          return prop;
+	        }
 
-	        timeout(function() {
-	            var startString = helpString('intro.buildings.start_tank') +
-	                helpString('intro.buildings.tank_edge_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-	            revealTank(tank, startString);
+	        return gj;
+	      }
+	    };
+	    return t;
+	  }();
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealTank(tank, startString, { duration: 0 });
-	            });
+	  module.exports = toGeoJSON;
+	});
 
-	            context.on('enter.intro', function(mode) {
-	                if (mode.id !== 'draw-area') { return chapter.restart(); }
-	                continueTo(continueTank);
-	            });
+	var _initialized = false;
+	var _enabled = false;
 
-	        }, 550);  // after easing
+	var _geojson;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
-	    }
+	function svgData(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
+	  var _showLabels = true;
+	  var detected = utilDetect();
+	  var layer = select(null);
 
-	    function continueTank() {
-	        if (context.mode().id !== 'draw-area') {
-	            return continueTo(addTank);
-	        }
+	  var _vtService;
 
-	        _tankID = null;
+	  var _fileList;
 
-	        var continueString = helpString('intro.buildings.continue_tank') + '{br}' +
-	            helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-	            helpString('intro.buildings.finish_tank');
+	  var _template;
 
-	        revealTank(tank, continueString);
+	  var _src;
 
-	        context.map().on('move.intro drawn.intro', function() {
-	            revealTank(tank, continueString, { duration: 0 });
-	        });
+	  function init() {
+	    if (_initialized) return; // run once
 
-	        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);
-	            }
-	        });
+	    _geojson = {};
+	    _enabled = true;
 
-	        function continueTo(nextStep) {
-	            context.map().on('move.intro drawn.intro', null);
-	            context.on('enter.intro', null);
-	            nextStep();
-	        }
+	    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;
+	  }
 
-	    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]));
-	        }
+	  function getService() {
+	    if (services.vectorTile && !_vtService) {
+	      _vtService = services.vectorTile;
 
-	        // disallow scrolling
-	        context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+	      _vtService.event.on('loadedData', throttledRedraw);
+	    } else if (!services.vectorTile && _vtService) {
+	      _vtService = null;
+	    }
 
-	        timeout(function() {
-	            // reset pane, in case user somehow happened to change it..
-	            context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+	    return _vtService;
+	  }
 
-	            context.container().select('.preset-search-input')
-	                .on('keydown.intro', null)
-	                .on('keyup.intro', checkPresetSearch);
+	  function showLayer() {
+	    layerOn();
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+	      dispatch.call('change');
+	    });
+	  }
 
-	            reveal('.preset-search-input',
-	                helpString('intro.buildings.search_tank', { preset: tankPreset.name() })
-	            );
-	        }, 400);  // after preset list pane visible..
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
+	  }
 
-	        context.on('enter.intro', function(mode) {
-	            if (!_tankID || !context.hasEntity(_tankID)) {
-	                return continueTo(addTank);
-	            }
+	  function layerOn() {
+	    layer.style('display', 'block');
+	  }
 
-	            var ids = context.selectedIDs();
-	            if (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
-	                // keep the user's area selected..
-	                context.enter(modeSelect(context, [_tankID]));
+	  function layerOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  } // ensure that all geojson features in a collection have IDs
 
-	                // 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);
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', null)
-	                    .on('keyup.intro', checkPresetSearch);
+	  function ensureIDs(gj) {
+	    if (!gj) return null;
 
-	                reveal('.preset-search-input',
-	                    helpString('intro.buildings.search_tank', { preset: tankPreset.name() })
-	                );
+	    if (gj.type === 'FeatureCollection') {
+	      for (var i = 0; i < gj.features.length; i++) {
+	        ensureFeatureID(gj.features[i]);
+	      }
+	    } else {
+	      ensureFeatureID(gj);
+	    }
 
-	                context.history().on('change.intro', null);
-	            }
-	        });
+	    return gj;
+	  } // ensure that each single Feature object has a unique ID
 
-	        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 }
-	                );
+	  function ensureFeatureID(feature) {
+	    if (!feature) return;
+	    feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
+	    return feature;
+	  } // Prefer an array of Features instead of a FeatureCollection
 
-	                context.container().select('.preset-search-input')
-	                    .on('keydown.intro', eventCancel, true)
-	                    .on('keyup.intro', null);
 
-	                context.history().on('change.intro', function() {
-	                    continueTo(closeEditorTank);
-	                });
-	            }
-	        }
+	  function getFeatures(gj) {
+	    if (!gj) return [];
 
-	        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();
-	        }
+	    if (gj.type === 'FeatureCollection') {
+	      return gj.features;
+	    } else {
+	      return [gj];
 	    }
+	  }
 
+	  function featureKey(d) {
+	    return d.__featurehash__;
+	  }
 
-	    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]));
-	        }
+	  function isPolygon(d) {
+	    return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+	  }
 
-	        context.history().checkpoint('hasTank');
+	  function clipPathID(d) {
+	    return 'ideditor-data-' + d.__featurehash__ + '-clippath';
+	  }
 
-	        context.on('exit.intro', function() {
-	            continueTo(rightClickTank);
-	        });
+	  function featureClasses(d) {
+	    return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
+	  }
 
-	        timeout(function() {
-	            reveal('.entity-editor-pane',
-	                helpString('intro.buildings.close', { button: icon('#iD-icon-close', 'pre-text') })
-	            );
-	        }, 500);
+	  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
 
-	        function continueTo(nextStep) {
-	            context.on('exit.intro', null);
-	            nextStep();
-	        }
-	    }
+	    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); // 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];
+	      });
+	    }
+	  }
 
-	    function rightClickTank() {
-	        if (!_tankID) { return continueTo(addTank); }
+	  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];
+	  }
 
-	        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
-	            });
+	  function xmlToDom(textdata) {
+	    return new DOMParser().parseFromString(textdata, 'text/xml');
+	  }
 
-	            var rightclickString = helpString('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_tank' : 'edit_menu_tank_touch'));
+	  drawData.setFile = function (extension, data) {
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null;
+	    var gj;
 
-	            revealTank(tank, rightclickString);
+	    switch (extension) {
+	      case '.gpx':
+	        gj = togeojson.gpx(xmlToDom(data));
+	        break;
 
-	            context.map().on('move.intro drawn.intro', function() {
-	                revealTank(tank, rightclickString, { duration: 0 });
-	            });
+	      case '.kml':
+	        gj = togeojson.kml(xmlToDom(data));
+	        break;
 
-	            context.history().on('change.intro', function() {
-	                continueTo(rightClickTank);
-	            });
+	      case '.geojson':
+	      case '.json':
+	        gj = JSON.parse(data);
+	        break;
+	    }
 
-	        }, 600);
+	    gj = gj || {};
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro drawn.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+	    if (Object.keys(gj).length) {
+	      _geojson = ensureIDs(gj);
+	      _src = extension + ' data file';
+	      this.fitZoom();
 	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    function clickCircle() {
-	        if (!_tankID) { return chapter.restart(); }
-	        var entity = context.hasEntity(_tankID);
-	        if (!entity) { return continueTo(rightClickTank); }
+	  drawData.showLabels = function (val) {
+	    if (!arguments.length) return _showLabels;
+	    _showLabels = val;
+	    return this;
+	  };
 
-	        var node = selectMenuItem(context, 'circularize').node();
-	        if (!node) { return continueTo(rightClickTank); }
+	  drawData.enabled = function (val) {
+	    if (!arguments.length) return _enabled;
+	    _enabled = val;
 
-	        var wasChanged = false;
+	    if (_enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	        reveal('.edit-menu',
-	            helpString('intro.buildings.circle_tank'),
-	            { padding: 50 }
-	        );
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	        context.on('enter.intro', function(mode) {
-	            if (mode.id === 'browse') {
-	                continueTo(rightClickTank);
-	            } else if (mode.id === 'move' || mode.id === 'rotate') {
-	                continueTo(retryClickCircle);
-	            }
-	        });
+	  drawData.hasData = function () {
+	    var gj = _geojson || {};
+	    return !!(_template || Object.keys(gj).length);
+	  };
 
-	        context.map().on('move.intro', function() {
-	            var node = selectMenuItem(context, 'circularize').node();
-	            if (!wasChanged && !node) { return continueTo(rightClickTank); }
+	  drawData.template = function (val, src) {
+	    if (!arguments.length) return _template; // test source against OSM imagery blocklists..
 
-	            reveal('.edit-menu',
-	                helpString('intro.buildings.circle_tank'),
-	                { duration: 0, padding: 50 }
-	            );
-	        });
+	    var osm = context.connection();
 
-	        context.history().on('change.intro', function() {
-	            wasChanged = true;
-	            context.history().on('change.intro', null);
+	    if (osm) {
+	      var blocklists = osm.imageryBlocklists();
+	      var fail = false;
+	      var tested = 0;
+	      var regex;
 
-	            // 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
-	        });
+	      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.
 
-	        function continueTo(nextStep) {
-	            context.on('enter.intro', null);
-	            context.map().on('move.intro', null);
-	            context.history().on('change.intro', null);
-	            nextStep();
-	        }
+
+	      if (!tested) {
+	        regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+	        fail = regex.test(val);
+	      }
 	    }
 
+	    _template = val;
+	    _fileList = null;
+	    _geojson = null; // strip off the querystring/hash from the template,
+	    // it often includes the access token
 
-	    function retryClickCircle() {
-	        context.enter(modeBrowse(context));
+	    _src = src || 'vectortile:' + val.split(/[?#]/)[0];
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	        revealTank(tank, helpString('intro.buildings.retry_circle'), {
-	            buttonText: _t('intro.ok'),
-	            buttonCallback: function() { continueTo(rightClickTank); }
-	        });
+	  drawData.geojson = function (gj, src) {
+	    if (!arguments.length) return _geojson;
+	    _template = null;
+	    _fileList = null;
+	    _geojson = null;
+	    _src = null;
+	    gj = gj || {};
 
-	        function continueTo(nextStep) {
-	            nextStep();
-	        }
+	    if (Object.keys(gj).length) {
+	      _geojson = ensureIDs(gj);
+	      _src = src || 'unknown.geojson';
 	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    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'); }
-	            }
-	        );
-	    }
+	  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);
+	      };
+	    }();
 
+	    reader.readAsText(f);
+	    return this;
+	  };
 
-	    chapter.enter = function() {
-	        addHouse();
-	    };
+	  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;
 
-	    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);
-	    };
+	    if (extension) {
+	      _template = null;
+	      d3_text(url).then(function (data) {
+	        drawData.setFile(extension, data);
+	      })["catch"](function () {
+	        /* ignore */
+	      });
+	    } else {
+	      drawData.template(url);
+	    }
 
+	    return this;
+	  };
 
-	    chapter.restart = function() {
-	        chapter.exit();
-	        chapter.enter();
-	    };
+	  drawData.getSrc = function () {
+	    return _src || '';
+	  };
 
+	  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 */
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	      switch (geom.type) {
+	        case 'Point':
+	          c = [c];
 
-	function uiIntroStartEditing(context, reveal) {
-	    var dispatch$1 = dispatch('done', 'startEditing');
-	    var modalSelection = select(null);
+	        case 'MultiPoint':
+	        case 'LineString':
+	          break;
 
+	        case 'MultiPolygon':
+	          c = utilArrayFlatten(c);
 
-	    var chapter = {
-	        title: 'intro.startediting.title'
-	    };
+	        case 'Polygon':
+	        case 'MultiLineString':
+	          c = utilArrayFlatten(c);
+	          break;
+	      }
+	      /* eslint-enable no-fallthrough */
 
-	    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(); }
-	            }
-	        );
-	    }
+	      return utilArrayUnion(coords, c);
+	    }, []);
 
-	    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(); }
-	            }
-	        );
+	    if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
+	      var extent = geoExtent(d3_geoBounds({
+	        type: 'LineString',
+	        coordinates: coords
+	      }));
+	      map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
 	    }
 
-	    function showStart() {
-	        context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
-
-	        modalSelection = uiModal(context.container());
-
-	        modalSelection.select('.modal')
-	            .attr('class', 'modal-splash modal');
-
-	        modalSelection.selectAll('.close').remove();
+	    return this;
+	  };
 
-	        var startbutton = modalSelection.select('.content')
-	            .attr('class', 'fillL')
-	            .append('button')
-	                .attr('class', 'modal-section huge-modal-button')
-	                .on('click', function() {
-	                    modalSelection.remove();
-	                });
+	  init();
+	  return drawData;
+	}
 
-	            startbutton
-	                .append('svg')
-	                .attr('class', 'illustration')
-	                .append('use')
-	                .attr('xlink:href', '#iD-logo-walkthrough');
+	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 = [];
 
-	            startbutton
-	                .append('h2')
-	                .text(_t('intro.startediting.start'));
+	    if (showTile) {
+	      debugData.push({
+	        "class": 'red',
+	        label: 'tile'
+	      });
+	    }
 
-	        dispatch$1.call('startEditing');
+	    if (showCollision) {
+	      debugData.push({
+	        "class": 'yellow',
+	        label: 'collision'
+	      });
 	    }
 
+	    if (showImagery) {
+	      debugData.push({
+	        "class": 'orange',
+	        label: 'imagery'
+	      });
+	    }
 
-	    chapter.enter = function() {
-	        showHelp();
-	    };
+	    if (showTouchTargets) {
+	      debugData.push({
+	        "class": 'pink',
+	        label: 'touchTargets'
+	      });
+	    }
 
+	    if (showDownloaded) {
+	      debugData.push({
+	        "class": 'purple',
+	        label: 'downloaded'
+	      });
+	    }
 
-	    chapter.exit = function() {
-	        modalSelection.remove();
-	        context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
-	    };
+	    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
 
+	    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
 
-	    return utilRebind(chapter, dispatch$1, 'on');
-	}
+	    var osm = context.connection();
+	    var dataDownloaded = [];
 
-	var chapterUi = {
-	  welcome: uiIntroWelcome,
-	  navigation: uiIntroNavigation,
-	  point: uiIntroPoint,
-	  area: uiIntroArea,
-	  line: uiIntroLine,
-	  building: uiIntroBuilding,
-	  startEditing: uiIntroStartEditing
-	};
+	    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]]]
+	          }
+	        };
+	      });
+	    }
 
-	var chapterFlow = [
-	  'welcome',
-	  'navigation',
-	  'point',
-	  'area',
-	  'line',
-	  'building',
-	  'startEditing'
-	];
+	    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.
 
-	function uiIntro(context) {
-	  var INTRO_IMAGERY = 'EsriWorldImageryClarity';
-	  var _introGraph = {};
-	  var _currChapter;
 
+	  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 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 */ });
-	  }
+	  return drawDebug;
+	}
 
+	/*
+	    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 startIntro(selection) {
-	    context.enter(modeBrowse(context));
+	function svgDefs(context) {
+	  var _defsSelection = select(null);
 
-	    // 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;
+	  var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];
 
-	    // 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);
+	  function drawDefs(selection) {
+	    _defsSelection = selection.append('defs'); // add markers
 
-	    // Block saving
-	    context.inIntro(true);
+	    _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)
 
-	    // 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');
 
-	    // Setup imagery
-	    var imagery = context.background().findSource(INTRO_IMAGERY);
-	    if (imagery) {
-	      context.background().baseLayerSource(imagery);
-	    } else {
-	      context.background().bing();
+	    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);
 	    }
-	    overlays.forEach(function (d) { return context.background().toggleOverlayLayer(d); });
 
-	    // 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');
-	      }
-	    });
+	    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
 
-	    context.container().selectAll('.main-map .layer-background').style('opacity', 1);
+	    addSidedMarker('barrier', '#ddd', 1);
+	    addSidedMarker('man_made', '#fff', 0);
 
-	    var curtain = uiCurtain(context.container().node());
-	    selection.call(curtain);
+	    _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');
 
-	    // Store that the user started the walkthrough..
-	    corePreferences('walkthrough_started', 'yes');
+	    _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
 
-	    // Restore previous walkthrough progress..
-	    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 () {
+	    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');
 
-	          buttons
-	            .filter(function (d) { return d.title === s.title; })
-	            .classed('finished', true);
+	    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
 
-	          if (i < chapterFlow.length - 1) {
-	            var next = chapterFlow[i + 1];
-	            context.container().select(("button.chapter-" + next))
-	              .classed('next', true);
-	          }
+	    _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
 
-	          // 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(';'));
+	    addSprites(_spritesheetIds, true);
+	  }
 
-	      // Store if walkthrough is completed..
-	      var incomplete = utilArrayDifference(chapterFlow, progress);
-	      if (!incomplete.length) {
-	        corePreferences('walkthrough_completed', 'yes');
-	      }
+	  function addSprites(ids, overrideColors) {
+	    _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));
 
-	      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);
+	    var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);
+
+	    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());
+
+	        if (overrideColors && d !== 'iD-sprite') {
+	          // allow icon colors to be overridden..
+	          select(node).selectAll('path').attr('fill', 'currentColor');
+	        }
+	      })["catch"](function () {
+	        /* ignore */
+	      });
 	    });
+	    spritesheets.exit().remove();
+	  }
+
+	  drawDefs.addSprites = addSprites;
+	  return drawDefs;
+	}
 
-	    var navwrap = selection
-	      .append('div')
-	      .attr('class', 'intro-nav-wrap fillD');
+	var _layerEnabled = false;
 
-	    navwrap
-	      .append('svg')
-	      .attr('class', 'intro-nav-wrap-logo')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-walkthrough');
+	var _qaService;
 
-	    var buttonwrap = navwrap
-	      .append('div')
-	      .attr('class', 'joined')
-	      .selectAll('button.chapter');
+	function svgKeepRight(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
-	    var buttons = buttonwrap
-	      .data(chapters)
-	      .enter()
-	      .append('button')
-	      .attr('class', function (d, i) { return ("chapter chapter-" + (chapterFlow[i])); })
-	      .on('click', enterChapter);
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var layerVisible = false;
 
-	    buttons
-	      .append('span')
-	      .text(function (d) { return _t(d.title); });
+	  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.
 
-	    buttons
-	      .append('span')
-	      .attr('class', 'status')
-	      .call(svgIcon((_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'));
 
-	    enterChapter(chapters[0]);
+	  function getService() {
+	    if (services.keepRight && !_qaService) {
+	      _qaService = services.keepRight;
 
+	      _qaService.on('loaded', throttledRedraw);
+	    } else if (!services.keepRight && _qaService) {
+	      _qaService = null;
+	    }
 
-	    function enterChapter(newChapter) {
-	      if (_currChapter) { _currChapter.exit(); }
-	      context.enter(modeBrowse(context));
+	    return _qaService;
+	  } // Show the markers
 
-	      _currChapter = newChapter;
-	      _currChapter.enter();
 
-	      buttons
-	        .classed('next', false)
-	        .classed('active', function (d) { return d.title === _currChapter.title; });
+	  function editOn() {
+	    if (!layerVisible) {
+	      layerVisible = true;
+	      drawLayer.style('display', 'block');
 	    }
-	  }
+	  } // Immediately remove the markers and their touch targets
 
 
-	  return intro;
-	}
+	  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.
 
-	function uiIssuesInfo(context) {
 
-	    var warningsItem = {
-	        id: 'warnings',
-	        count: 0,
-	        iconID: 'iD-icon-alert',
-	        descriptionID: 'issues.warnings_and_errors'
-	    };
+	  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 resolvedItem = {
-	        id: 'resolved',
-	        count: 0,
-	        iconID: 'iD-icon-apply',
-	        descriptionID: 'issues.user_resolved_issues'
-	    };
 
-	    function update(selection) {
+	  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
+
 
-	        var shownItems = [];
+	  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..
 
-	        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);
-	        }
+	    var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
-	        if (corePreferences('validate-what') === 'all') {
-	            var resolvedIssues = context.validator().getResolvedIssues();
-	            if (resolvedIssues.length) {
-	                resolvedItem.count = resolvedIssues.length;
-	                shownItems.push(resolvedItem);
-	            }
-	        }
+	    markers.exit().remove(); // enter
 
-	        var chips = selection.selectAll('.chip')
-	            .data(shownItems, function(d) {
-	                return d.id;
-	            });
+	    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
 
-	        chips.exit().remove();
+	    markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+	      return d.id === selectedID;
+	    }).attr('transform', getTransform); // Draw targets..
 
-	        var enter = chips.enter()
-	            .append('a')
-	            .attr('class', function(d) {
-	                return 'chip ' + d.id + '-count';
-	            })
-	            .attr('href', '#')
-	            .attr('tabindex', -1)
-	            .each(function(d) {
+	    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
 
-	                var chipSelection = select(this);
+	    targets.exit().remove(); // enter/update
 
-	                var tooltipBehavior = uiTooltip()
-	                    .placement('top')
-	                    .title(_t(d.descriptionID));
+	    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);
 
-	                chipSelection
-	                    .call(tooltipBehavior)
-	                    .on('click', function() {
-	                        event.preventDefault();
+	    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.
 
-	                        tooltipBehavior.hide(select(this));
-	                        // open the Issues pane
-	                        context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
-	                    });
 
-	                chipSelection.call(svgIcon('#' + d.iconID));
+	  function drawKeepRight(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	            });
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
-	        enter.append('span')
-	            .attr('class', 'count');
+	    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);
 
-	        enter.merge(chips)
-	            .selectAll('span.count')
-	            .text(function(d) {
-	                return d.count.toString();
-	            });
+	    if (_layerEnabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadIssues(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
 	    }
+	  } // Toggles the layer on and off
 
 
-	    return function(selection) {
-	        update(selection);
+	  drawKeepRight.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled;
+	    _layerEnabled = val;
 
-	        context.validator().on('validated.infobox', function() {
-	            update(selection);
-	        });
-	    };
-	}
+	    if (_layerEnabled) {
+	      layerOn();
+	    } else {
+	      layerOff();
 
-	// import { utilGetDimensions } from '../util/dimensions';
+	      if (context.selectedErrorID()) {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	function uiMapInMap(context) {
+	  drawKeepRight.supported = function () {
+	    return !!getService();
+	  };
 
-	    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
-	            }
+	  return drawKeepRight;
+	}
 
-	            // lock in either zooming or panning, don't allow both in minimap.
-	            if (!_gesture) {
-	                _gesture = isZooming ? 'zoom' : 'pan';
-	            }
+	function svgGeolocate(projection) {
+	  var layer = select(null);
 
-	            var tMini = projection.transform();
-	            var tX, tY, scale;
+	  var _position;
 
-	            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;
-	            }
+	  function init() {
+	    if (svgGeolocate.initialized) return; // run once
 
-	            utilSetTransform(tiles, tX, tY, scale);
-	            utilSetTransform(viewport, 0, 0, scale);
-	            _isTransformed = true;
-	            _tCurr = identity$2.translate(x, y).scale(k);
+	    svgGeolocate.enabled = false;
+	    svgGeolocate.initialized = true;
+	  }
 
-	            var zMain = geoScaleToZoom(context.projection.scale());
-	            var zMini = geoScaleToZoom(k);
+	  function showLayer() {
+	    layer.style('display', 'block');
+	  }
 
-	            _zDiff = zMain - zMini;
+	  function hideLayer() {
+	    layer.transition().duration(250).style('opacity', 0);
+	  }
 
-	            queueRedraw();
-	        }
+	  function layerOn() {
+	    layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
+	  }
 
+	  function layerOff() {
+	    layer.style('display', 'none');
+	  }
 
-	        function zoomEnded() {
-	            if (_skipEvents) { return; }
-	            if (_gesture !== 'pan') { return; }
+	  function transform(d) {
+	    return svgPointTransform(projection)(d);
+	  }
 
-	            updateProjection();
-	            _gesture = null;
-	            context.map().center(projection.invert(_cMini));   // recenter main map..
-	        }
+	  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 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 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();
+	    }
+	  }
 
-	            projection
-	                .translate([tMain.x, tMain.y])
-	                .scale(kMini);
+	  drawLocation.enabled = function (position, enabled) {
+	    if (!arguments.length) return svgGeolocate.enabled;
+	    _position = position;
+	    svgGeolocate.enabled = enabled;
 
-	            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];
+	    if (svgGeolocate.enabled) {
+	      showLayer();
+	      layerOn();
+	    } else {
+	      hideLayer();
+	    }
 
-	            projection
-	                .translate([xMini, yMini])
-	                .clipExtent([[0, 0], _dMini]);
+	    return this;
+	  };
 
-	            _tCurr = projection.transform();
+	  init();
+	  return drawLocation;
+	}
 
-	            if (_isTransformed) {
-	                utilSetTransform(tiles, 0, 0);
-	                utilSetTransform(viewport, 0, 0);
-	                _isTransformed = false;
-	            }
+	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;
 
-	            zoom
-	                .scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+	  var _rdrawn = new RBush();
 
-	            _skipEvents = true;
-	            wrap.call(zoom.transform, _tCurr);
-	            _skipEvents = false;
-	        }
+	  var _rskipped = new RBush();
 
+	  var _textWidthCache = {};
+	  var _entitybboxes = {}; // Listed from highest to lowest priority
 
-	        function redraw() {
-	            clearTimeout(_timeoutID);
-	            if (_isHidden) { return; }
+	  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]];
 
-	            updateProjection();
-	            var zMini = geoScaleToZoom(projection.scale());
+	  function shouldSkipIcon(preset) {
+	    var noIcons = ['building', 'landuse', 'natural'];
+	    return noIcons.some(function (s) {
+	      return preset.id.indexOf(s) >= 0;
+	    });
+	  }
 
-	            // setup tile container
-	            tiles = wrap
-	                .selectAll('.map-in-map-tiles')
-	                .data([0]);
+	  function get(array, prop) {
+	    return function (d, i) {
+	      return array[i][prop];
+	    };
+	  }
 
-	            tiles = tiles.enter()
-	                .append('div')
-	                .attr('class', 'map-in-map-tiles')
-	                .merge(tiles);
+	  function textWidth(text, size, elem) {
+	    var c = _textWidthCache[size];
+	    if (!c) c = _textWidthCache[size] = {};
 
-	            // redraw background
-	            backgroundLayer
-	                .source(context.background().baseLayerSource())
-	                .projection(projection)
-	                .dimensions(_dMini);
+	    if (c[text]) {
+	      return c[text];
+	    } else if (elem) {
+	      c[text] = elem.getComputedTextLength();
+	      return c[text];
+	    } else {
+	      var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
 
-	            var background = tiles
-	                .selectAll('.map-in-map-background')
-	                .data([0]);
+	      if (str === null) {
+	        return size / 3 * 2 * text.length;
+	      } else {
+	        return size / 3 * (2 * text.length + str.length);
+	      }
+	    }
+	  }
 
-	            background.enter()
-	                .append('div')
-	                .attr('class', 'map-in-map-background')
-	                .merge(background)
-	                .call(backgroundLayer);
+	  function drawLinePaths(selection, entities, filter, classes, labels) {
+	    var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit
 
+	    paths.exit().remove(); // enter/update
 
-	            // 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));
-	                }
-	            }
+	    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'));
+	  }
 
-	            var overlay = tiles
-	                .selectAll('.map-in-map-overlay')
-	                .data([0]);
+	  function drawLineLabels(selection, entities, filter, classes, labels) {
+	    var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	            overlay = overlay.enter()
-	                .append('div')
-	                .attr('class', 'map-in-map-overlay')
-	                .merge(overlay);
+	    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
 
-	            var overlays = overlay
-	                .selectAll('div')
-	                .data(activeOverlayLayers, function(d) { return d.source().name(); });
+	    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);
+	  }
 
-	            overlays.exit()
-	                .remove();
+	  function drawPointLabels(selection, entities, filter, classes, labels) {
+	    var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-	            overlays = overlays.enter()
-	                .append('div')
-	                .merge(overlays)
-	                .each(function(layer) { select(this).call(layer); });
+	    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);
+	    });
+	  }
 
-	            var dataLayers = tiles
-	                .selectAll('.map-in-map-data')
-	                .data([0]);
+	  function drawAreaLabels(selection, entities, filter, classes, labels) {
+	    entities = entities.filter(hasText);
+	    labels = labels.filter(hasText);
+	    drawPointLabels(selection, entities, filter, classes, labels);
 
-	            dataLayers.exit()
-	                .remove();
+	    function hasText(d, i) {
+	      return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
+	    }
+	  }
 
-	            dataLayers = dataLayers.enter()
-	                .append('svg')
-	                .attr('class', 'map-in-map-data')
-	                .merge(dataLayers)
-	                .call(dataLayer)
-	                .call(debugLayer);
+	  function drawAreaIcons(selection, entities, filter, classes, labels) {
+	    var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
+	    icons.exit().remove(); // enter/update
 
-	            // redraw viewport bounding box
-	            if (_gesture !== 'pan') {
-	                var getPath = d3_geoPath(projection);
-	                var bbox = { type: 'Polygon', coordinates: [context.map().extent().polygon()] };
+	    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;
 
-	                viewport = wrap.selectAll('.map-in-map-viewport')
-	                    .data([0]);
+	      if (!picon) {
+	        return '';
+	      } else {
+	        var isMaki = /^maki-/.test(picon);
+	        return '#' + picon + (isMaki ? '-15' : '');
+	      }
+	    });
+	  }
 
-	                viewport = viewport.enter()
-	                    .append('svg')
-	                    .attr('class', 'map-in-map-viewport')
-	                    .merge(viewport);
+	  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 path = viewport.selectAll('.map-in-map-bbox')
-	                    .data([bbox]);
+	    var boxes = selection.selectAll('.' + which).data(gj); // exit
 
-	                path.enter()
-	                    .append('path')
-	                    .attr('class', 'map-in-map-bbox')
-	                    .merge(path)
-	                    .attr('d', getPath)
-	                    .classed('thick', function(d) { return getPath.area(d) < 30; });
-	            }
-	        }
+	    boxes.exit().remove(); // enter/update
 
+	    boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
+	  }
 
-	        function queueRedraw() {
-	            clearTimeout(_timeoutID);
-	            _timeoutID = setTimeout(function() { redraw(); }, 750);
-	        }
+	  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;
 
+	    for (i = 0; i < labelStack.length; i++) {
+	      labelable.push([]);
+	    }
 
-	        function toggle() {
-	            if (event) { event.preventDefault(); }
+	    if (fullRedraw) {
+	      _rdrawn.clear();
 
-	            _isHidden = !_isHidden;
+	      _rskipped.clear();
 
-	            context.container().select('.minimap-toggle-item')
-	                .classed('active', !_isHidden)
-	                .select('input')
-	                .property('checked', !_isHidden);
+	      _entitybboxes = {};
+	    } else {
+	      for (i = 0; i < entities.length; i++) {
+	        entity = entities[i];
+	        var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);
 
-	            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();
-	                    });
-	            }
-	        }
+	        for (j = 0; j < toRemove.length; j++) {
+	          _rdrawn.remove(toRemove[j]);
 
+	          _rskipped.remove(toRemove[j]);
+	        }
+	      }
+	    } // Loop through all the entities to do some preprocessing
 
-	        uiMapInMap.toggle = toggle;
 
-	        wrap = selection.selectAll('.map-in-map')
-	            .data([0]);
+	    for (i = 0; i < entities.length; i++) {
+	      entity = entities[i];
+	      geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices
 
-	        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();
-	                }
-	            });
+	      if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
+	        var hasDirections = entity.directions(graph, projection).length;
+	        var markerPadding;
 
-	        redraw();
+	        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;
+	        }
 
-	        context.keybinding()
-	            .on(_t('background.minimap.key'), toggle);
-	    }
+	        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
 
-	    return mapInMap;
-	}
 
-	function uiNotice(context) {
+	      if (geometry === 'vertex') {
+	        geometry = 'point';
+	      } // Determine which entities are label-able
 
-	    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);
-	            });
 
-	        button
-	            .call(svgIcon('#iD-icon-plus', 'pre-text'))
-	            .append('span')
-	            .attr('class', 'label')
-	            .text(_t('zoom_in_edit'));
+	      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 disableTooHigh() {
-	            var canEdit = context.map().zoom() >= context.minEditableZoom();
-	            div.style('display', canEdit ? 'none' : 'block');
+	        if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
+	          labelable[k].push(entity);
+	          break;
 	        }
+	      }
+	    }
 
-	        context.map()
-	            .on('move.notice', debounce(disableTooHigh, 500));
-
-	        disableTooHigh();
+	    var positions = {
+	      point: [],
+	      line: [],
+	      area: []
 	    };
-	}
-
-	function uiPhotoviewer(context) {
+	    var labelled = {
+	      point: [],
+	      line: [],
+	      area: []
+	    }; // Try and find a valid label for labellable entities
 
-	    var dispatch$1 = dispatch('resize');
+	    for (k = 0; k < labelable.length; k++) {
+	      var fontSize = labelStack[k][3];
 
-	    var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+	      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;
 
-	    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');
-	                }
+	        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);
+	        }
 
-	                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 (p) {
+	          if (geometry === 'vertex') {
+	            geometry = 'point';
+	          } // treat vertex like point
 
-	                dispatch.call(eventName, target, utilGetDimensions(target, true));
-	            }
 
-	            function clamp(num, min, max) {
-	                return Math.max(min, Math.min(num, max));
-	            }
+	          p.classes = geometry + ' tag-' + labelStack[k][1];
+	          positions[geometry].push(p);
+	          labelled[geometry].push(entity);
+	        }
+	      }
+	    }
 
-	            function stopResize() {
-	                if (pointerId !== (event.pointerId || 'mouse')) { return; }
+	    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;
+	      });
+	    }
 
-	                event.preventDefault();
-	                event.stopPropagation();
+	    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
+	        };
+	      }
 
-	                // remove all the listeners we added
-	                select(window)
-	                    .on('.' + eventName, null);
-	            }
+	      if (tryInsert([bbox], entity.id, true)) {
+	        return p;
+	      }
+	    }
 
-	            return function initResize() {
-	                event.preventDefault();
-	                event.stopPropagation();
+	    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
 
-	                pointerId = event.pointerId || 'mouse';
+	      var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70, 25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
+	      var padding = 3;
 
-	                startX = event.clientX;
-	                startY = event.clientY;
-	                var targetRect = target.node().getBoundingClientRect();
-	                startWidth = targetRect.width;
-	                startHeight = targetRect.height;
+	      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.
 
-	                select(window)
-	                    .on(_pointerPrefix + 'move.' + eventName, startResize, false)
-	                    .on(_pointerPrefix + 'up.' + eventName, stopResize, false);
+	        var sub = subpath(points, start, start + width);
 
-	                if (_pointerPrefix === 'pointer') {
-	                    select(window)
-	                        .on('pointercancel.' + eventName, stopResize, false);
-	                }
-	            };
+	        if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
+	          continue;
 	        }
-	    }
-
-	    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) ];
 
-	            photoviewer
-	                .style('width', setPhotoDimensions[0] + 'px')
-	                .style('height', setPhotoDimensions[1] + 'px');
+	        var isReverse = reverse(sub);
 
-	            dispatch$1.call('resize', photoviewer, setPhotoDimensions);
+	        if (isReverse) {
+	          sub = sub.reverse();
 	        }
-	    };
 
-	    return utilRebind(photoviewer, dispatch$1, 'on');
-	}
+	        var bboxes = [];
+	        var boxsize = (height + 2) / 2;
 
-	function uiRestore(context) {
-	  return function(selection) {
-	    if (!context.history().hasRestorableChanges()) { return; }
+	        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 modalSelection = uiModal(selection, true);
+	          var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
 
-	    modalSelection.select('.modal')
-	      .attr('class', 'modal fillL');
+	          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)
+	            });
+	          }
+	        }
 
-	    var introModal = modalSelection.select('.content');
+	        if (tryInsert(bboxes, entity.id, false)) {
+	          // accept this one
+	          return {
+	            'font-size': height + 2,
+	            lineString: lineString(sub),
+	            startOffset: offset + '%'
+	          };
+	        }
+	      }
 
-	    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'));
+	      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);
+	      }
 
-	    restore.node().focus();
-	  };
-	}
+	      function lineString(points) {
+	        return 'M' + points.join('L');
+	      }
 
-	function uiScale(context) {
-	    var projection = context.projection,
-	        isImperial = !_mainLocalizer.usesMetric(),
-	        maxLength = 180,
-	        tickHeight = 8;
+	      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;
 
-	    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;
+	          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 (isImperial) {
-	            buckets = [5280000, 528000, 52800, 5280, 500, 50, 5, 1];
-	        } else {
-	            buckets = [5000000, 500000, 50000, 5000, 500, 50, 5, 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;
+	          }
 
-	        // 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);
-	            }
+	          sofar += current;
 	        }
 
-	        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;
+	        var result = points.slice(i0, i1);
+	        result.unshift(start);
+	        result.push(end);
+	        return result;
+	      }
 	    }
 
+	    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 = {};
 
-	    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);
+	      if (picon) {
+	        // icon and label..
+	        if (addIcon()) {
+	          addLabel(iconSize + padding);
+	          return p;
+	        }
+	      } else {
+	        // label only..
+	        if (addLabel(0)) {
+	          return p;
+	        }
+	      }
 
-	        selection.select('.scale-path')
-	            .attr('d', 'M0.5,0.5v' + tickHeight + 'h' + scale.px + 'v-' + tickHeight);
+	      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
+	        };
 
-	        selection.select('.scale-textgroup')
-	            .attr('transform', 'translate(' + (scale.px + 8) + ',' + tickHeight + ')');
+	        if (tryInsert([bbox], entity.id + 'I', true)) {
+	          p.transform = 'translate(' + iconX + ',' + iconY + ')';
+	          return true;
+	        }
 
-	        selection.select('.scale-text')
-	            .text(scale.text);
-	    }
+	        return false;
+	      }
 
+	      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
+	          };
 
-	    return function(selection) {
-	        function switchUnits() {
-	            isImperial = !isImperial;
-	            selection.call(update);
+	          if (tryInsert([bbox], entity.id, true)) {
+	            p.x = labelX;
+	            p.y = labelY;
+	            p.textAnchor = 'middle';
+	            p.height = height;
+	            return true;
+	          }
 	        }
 
-	        var scalegroup = selection.append('svg')
-	            .attr('class', 'scale')
-	            .on('click', switchUnits)
-	            .append('g')
-	            .attr('transform', 'translate(10,11)');
+	        return false;
+	      }
+	    } // force insert a singular bounding box
+	    // singular box only, no array, id better be unique
 
-	        scalegroup
-	            .append('path')
-	            .attr('class', 'scale-path');
 
-	        scalegroup
-	            .append('g')
-	            .attr('class', 'scale-textgroup')
-	            .append('text')
-	            .attr('class', 'scale-text');
+	    function doInsert(bbox, id) {
+	      bbox.id = id;
+	      var oldbox = _entitybboxes[id];
 
-	        selection.call(update);
+	      if (oldbox) {
+	        _rdrawn.remove(oldbox);
+	      }
 
-	        context.map().on('move.scale', function() {
-	            update(selection);
-	        });
-	    };
-	}
+	      _entitybboxes[id] = bbox;
 
-	function uiShortcuts(context) {
-	    var detected = utilDetect();
-	    var _activeTab = 0;
-	    var _modalSelection;
-	    var _selection = select(null);
+	      _rdrawn.insert(bbox);
+	    }
 
+	    function tryInsert(bboxes, id, saveSkipped) {
+	      var skipped = false;
 
-	    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);
-	            }
-	        });
+	      for (var i = 0; i < bboxes.length; i++) {
+	        var bbox = bboxes[i];
+	        bbox.id = id; // Check that label is visible
 
+	        if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
+	          skipped = true;
+	          break;
+	        }
 
-	    function shortcutsModal(_modalSelection) {
-	        _modalSelection.select('.modal')
-	            .classed('modal-shortcuts', true);
+	        if (_rdrawn.collides(bbox)) {
+	          skipped = true;
+	          break;
+	        }
+	      }
 
-	        var content = _modalSelection.select('.content');
+	      _entitybboxes[id] = bboxes;
 
-	        content
-	            .append('div')
-	            .attr('class', 'modal-section')
-	            .append('h3')
-	            .text(_t('shortcuts.title'));
+	      if (skipped) {
+	        if (saveSkipped) {
+	          _rskipped.load(bboxes);
+	        }
+	      } else {
+	        _rdrawn.load(bboxes);
+	      }
 
-	        _mainFileFetcher.get('shortcuts')
-	            .then(function(data) { content.call(render, data); })
-	            .catch(function() { /* ignore */ });
+	      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 render(selection, dataShortcuts) {
-	        var wrapper = selection
-	            .selectAll('.wrapper')
-	            .data([0]);
+	    drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
+	    drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines
 
-	        var wrapperEnter = wrapper
-	            .enter()
-	            .append('div')
-	            .attr('class', 'wrapper modal-section');
+	    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
 
-	        var tabsBar = wrapperEnter
-	            .append('div')
-	            .attr('class', 'tabs-bar');
+	    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
 
-	        var shortcutsList = wrapperEnter
-	            .append('div')
-	            .attr('class', 'shortcuts-list');
+	    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
+	      };
 
-	        wrapper = wrapper.merge(wrapperEnter);
+	      var nearMouse = _rdrawn.search(bbox).map(function (entity) {
+	        return entity.id;
+	      });
 
-	        var tabs = tabsBar
-	            .selectAll('.tab')
-	            .data(dataShortcuts);
+	      ids.push.apply(ids, nearMouse);
+	    } // hide labels on selected nodes (they look weird when dragging / haloed)
 
-	        var tabsEnter = tabs
-	            .enter()
-	            .append('div')
-	            .attr('class', 'tab')
-	            .on('click', function (d, i) {
-	                _activeTab = i;
-	                render(selection, dataShortcuts);
-	            });
 
-	        tabsEnter
-	            .append('span')
-	            .text(function (d) { return _t(d.text); });
+	    for (var i = 0; i < selectedIDs.length; i++) {
+	      var entity = graph.hasEntity(selectedIDs[i]);
 
-	        tabs = tabs
-	            .merge(tabsEnter);
+	      if (entity && entity.type === 'node') {
+	        ids.push(selectedIDs[i]);
+	      }
+	    }
 
-	        // Update
-	        wrapper.selectAll('.tab')
-	            .classed('active', function (d, i) {
-	                return i === _activeTab;
-	            });
+	    layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..
 
+	    var debug = selection.selectAll('.labels-group.debug');
+	    var gj = [];
 
-	        var shortcuts = shortcutsList
-	            .selectAll('.shortcut-tab')
-	            .data(dataShortcuts);
+	    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 shortcutsEnter = shortcuts
-	            .enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'shortcut-tab shortcut-tab-' + d.tab; });
+	    var box = debug.selectAll('.debug-mouse').data(gj); // exit
 
-	        var columnsEnter = shortcutsEnter
-	            .selectAll('.shortcut-column')
-	            .data(function (d) { return d.columns; })
-	            .enter()
-	            .append('table')
-	            .attr('class', 'shortcut-column');
+	    box.exit().remove(); // enter/update
 
-	        var rowsEnter = columnsEnter
-	            .selectAll('.shortcut-row')
-	            .data(function (d) { return d.rows; })
-	            .enter()
-	            .append('tr')
-	            .attr('class', 'shortcut-row');
+	    box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
+	  }
 
+	  var throttleFilterLabels = throttle(filterLabels, 100);
 
-	        var sectionRows = rowsEnter
-	            .filter(function (d) { return !d.shortcuts; });
+	  drawLabels.observe = function (selection) {
+	    var listener = function listener() {
+	      throttleFilterLabels(selection);
+	    };
 
-	        sectionRows
-	            .append('td');
+	    selection.on('mousemove.hidelabels', listener);
+	    context.on('enter.hidelabels', listener);
+	  };
 
-	        sectionRows
-	            .append('td')
-	            .attr('class', 'shortcut-section')
-	            .append('h3')
-	            .text(function (d) { return _t(d.text); });
+	  drawLabels.off = function (selection) {
+	    throttleFilterLabels.cancel();
+	    selection.on('mousemove.hidelabels', null);
+	    context.on('enter.hidelabels', null);
+	  };
 
+	  return drawLabels;
+	}
 
-	        var shortcutRows = rowsEnter
-	            .filter(function (d) { return d.shortcuts; });
+	var _layerEnabled$1 = false;
 
-	        var shortcutKeys = shortcutRows
-	            .append('td')
-	            .attr('class', 'shortcut-keys');
+	var _qaService$1;
 
-	        var modifierKeys = shortcutKeys
-	            .filter(function (d) { return d.modifiers; });
+	function svgImproveOSM(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
-	        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);
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var layerVisible = false;
 
-	                selection
-	                    .append('kbd')
-	                    .attr('class', 'modifier')
-	                    .text(function (d) { return uiCmd.display(d); });
+	  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
 
-	                selection
-	                    .append('span')
-	                    .text('+');
-	            });
 
+	  function getService() {
+	    if (services.improveOSM && !_qaService$1) {
+	      _qaService$1 = services.improveOSM;
 
-	        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'];
-	                }
+	      _qaService$1.on('loaded', throttledRedraw);
+	    } else if (!services.improveOSM && _qaService$1) {
+	      _qaService$1 = null;
+	    }
 
-	                // replace translations
-	                arr = arr.map(function(s) {
-	                    return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
-	                });
+	    return _qaService$1;
+	  } // Show the markers
 
-	                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; });
-	                }
 
-	                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 editOn() {
+	    if (!layerVisible) {
+	      layerVisible = true;
+	      drawLayer.style('display', 'block');
+	    }
+	  } // Immediately remove the markers and their touch targets
 
 
-	        shortcutKeys
-	            .filter(function(d) { return d.gesture; })
-	            .each(function () {
-	                var selection = select(this);
+	  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.
 
-	                selection
-	                    .append('span')
-	                    .text('+');
 
-	                selection
-	                    .append('span')
-	                    .attr('class', 'gesture')
-	                    .text(function (d) { return _t(d.gesture); });
-	            });
+	  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.
 
 
-	        shortcutRows
-	            .append('td')
-	            .attr('class', 'shortcut-desc')
-	            .text(function (d) { return d.text ? _t(d.text) : '\u00a0'; });
+	  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
 
 
-	        shortcuts = shortcuts
-	            .merge(shortcutsEnter);
+	  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..
 
-	        // Update
-	        wrapper.selectAll('.shortcut-tab')
-	            .style('display', function (d, i) {
-	                return i === _activeTab ? 'flex' : 'none';
-	            });
-	    }
+	    var markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+	      return d.id;
+	    }); // exit
 
+	    markers.exit().remove(); // enter
 
-	    return function(selection, show) {
-	        _selection = selection;
-	        if (show) {
-	            _modalSelection = uiModal(selection);
-	            _modalSelection.call(shortcutsModal);
-	        }
-	    };
-	}
+	    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;
 
-	var pair_1 = pair;
+	      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..
 
-	function search(input, dims) {
-	  if (!dims) { dims = 'NSEW'; }
-	  if (typeof input !== 'string') { return null; }
+	    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
 
-	  input = input.toUpperCase();
-	  var regex = /^[\s\,]*([NSEW])?\s*([\-|\—|\―]?[0-9.]+)[°º˚]?\s*(?:([0-9.]+)['’′‘]\s*)?(?:([0-9.]+)(?:''|"|”|″)\s*)?([NSEW])?/;
+	    targets.exit().remove(); // enter/update
 
-	  var m = input.match(regex);
-	  if (!m) { return null; }  // no match
+	    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);
 
-	  var matched = m[0];
+	    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.
 
-	  // 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 unrecognized dimension
-	  if (dim && dims.indexOf(dim) === -1) { return null; }
+	  function drawImproveOSM(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	  // 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 (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
-	  return {
-	    val: (Math.abs(deg) + min + sec) * sign,
-	    dim: dim,
-	    matched: matched,
-	    remain: input.slice(matched.length)
-	  };
-	}
+	    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);
 
+	    if (_layerEnabled$1) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadIssues(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
-	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; }
+	  drawImproveOSM.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled$1;
+	    _layerEnabled$1 = val;
 
-	  if (one.dim) {
-	    return swapdim(one.val, two.val, one.dim);
-	  } else {
-	    return [one.val, two.val];
-	  }
-	}
+	    if (_layerEnabled$1) {
+	      layerOn();
+	    } else {
+	      layerOff();
+
+	      if (context.selectedErrorID()) {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	function swapdim(a, b, dim) {
-	  if (dim === 'N' || dim === 'S') { return [a, b]; }
-	  if (dim === 'W' || dim === 'E') { return [b, a]; }
-	}
+	  drawImproveOSM.supported = function () {
+	    return !!getService();
+	  };
 
-	function uiFeatureList(context) {
-	    var _geocodeResults;
+	  return drawImproveOSM;
+	}
 
+	var _layerEnabled$2 = false;
 
-	    function featureList(selection) {
-	        var header = selection
-	            .append('div')
-	            .attr('class', 'header fillL cf');
+	var _qaService$2;
 
-	        header
-	            .append('h3')
-	            .text(_t('inspector.feature_list'));
+	function svgOsmose(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    return dispatch.call('change');
+	  }, 1000);
 
-	        var searchWrap = selection
-	            .append('div')
-	            .attr('class', 'search-header');
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var layerVisible = false;
 
-	        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 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
 
-	        searchWrap
-	            .call(svgIcon('#iD-icon-search', 'pre-text'));
 
-	        var listWrap = selection
-	            .append('div')
-	            .attr('class', 'inspector-body');
+	  function getService() {
+	    if (services.osmose && !_qaService$2) {
+	      _qaService$2 = services.osmose;
 
-	        var list = listWrap
-	            .append('div')
-	            .attr('class', 'feature-list cf');
+	      _qaService$2.on('loaded', throttledRedraw);
+	    } else if (!services.osmose && _qaService$2) {
+	      _qaService$2 = null;
+	    }
 
-	        context
-	            .on('exit.feature-list', clearSearch);
-	        context.map()
-	            .on('drawn.feature-list', mapDrawn);
+	    return _qaService$2;
+	  } // Show the markers
 
-	        context.keybinding()
-	            .on(uiCmd('⌘F'), focusSearch);
 
+	  function editOn() {
+	    if (!layerVisible) {
+	      layerVisible = true;
+	      drawLayer.style('display', 'block');
+	    }
+	  } // Immediately remove the markers and their touch targets
 
-	        function focusSearch() {
-	            var mode = context.mode() && context.mode().id;
-	            if (mode !== 'browse') { return; }
 
-	            event.preventDefault();
-	            search.node().focus();
-	        }
+	  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.
 
 
-	        function keydown() {
-	            if (event.keyCode === 27) {  // escape
-	                search.node().blur();
-	            }
-	        }
+	  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.
 
 
-	        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 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
 
 
-	        function inputevent() {
-	            _geocodeResults = undefined;
-	            drawList();
-	        }
+	  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
 
-	        function clearSearch() {
-	            search.property('value', '');
-	            drawList();
-	        }
+	    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', 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
 
-	        function mapDrawn(e) {
-	            if (e.full) {
-	                drawList();
-	            }
-	        }
+	    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
 
-	        function features() {
-	            var result = [];
-	            var graph = context.graph();
-	            var visibleCenter = context.map().extent().center();
-	            var q = search.property('value').toLowerCase();
+	    targets.exit().remove(); // enter/update
 
-	            if (!q) { return result; }
+	    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);
 
-	            var idMatch = q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
+	    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.
 
-	            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
-	                });
-	            }
 
-	            var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);
+	  function drawOsmose(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	            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
-	                });
-	            }
+	    if (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
-	            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
-	                });
+	    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);
 
-	                if (localResults.length > 100) { break; }
-	            }
-	            localResults = localResults.sort(function byDistance(a, b) {
-	                return a.distance - b.distance;
-	            });
-	            result = result.concat(localResults);
+	    if (_layerEnabled$2) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadIssues(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
+	    }
+	  } // Toggles the layer on and off
 
-	            (_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;
+	  drawOsmose.enabled = function (val) {
+	    if (!arguments.length) return _layerEnabled$2;
+	    _layerEnabled$2 = val;
 
-	                    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
-	                    }
+	    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();
 
-	                    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])])
-	                    });
-	                }
-	            });
+	      if (context.selectedErrorID()) {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
 
-	            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
-	                });
-	            }
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	            return result;
-	        }
+	  drawOsmose.supported = function () {
+	    return !!getService();
+	  };
 
+	  return drawOsmose;
+	}
 
-	        function drawList() {
-	            var value = search.property('value');
-	            var results = features();
+	function svgStreetside(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	            list.classed('filtered', value.length);
+	  var minZoom = 14;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
+	  var _viewerYaw = 0;
+	  var _selectedSequence = null;
 
-	            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'));
-	            }
+	  var _streetside;
+	  /**
+	   * init().
+	   */
 
-	            list.selectAll('.no-results-item')
-	                .style('display', (value.length && !results.length) ? 'block' : 'none');
 
-	            list.selectAll('.geocode-item')
-	                .style('display', (value && _geocodeResults === undefined) ? 'block' : 'none');
+	  function init() {
+	    if (svgStreetside.initialized) return; // run once
 
-	            list.selectAll('.feature-list-item')
-	                .data([-1])
-	                .remove();
+	    svgStreetside.enabled = false;
+	    svgStreetside.initialized = true;
+	  }
+	  /**
+	   * getService().
+	   */
 
-	            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);
+	  function getService() {
+	    if (services.streetside && !_streetside) {
+	      _streetside = services.streetside;
 
-	            var label = enter
-	                .append('div')
-	                .attr('class', 'label');
+	      _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
+	    } else if (!services.streetside && _streetside) {
+	      _streetside = null;
+	    }
 
-	            label
-	                .each(function(d) {
-	                    select(this)
-	                        .call(svgIcon('#iD-icon-' + d.geometry, 'pre-text'));
-	                });
+	    return _streetside;
+	  }
+	  /**
+	   * showLayer().
+	   */
 
-	            label
-	                .append('span')
-	                .attr('class', 'entity-type')
-	                .text(function(d) { return d.type; });
 
-	            label
-	                .append('span')
-	                .attr('class', 'entity-name')
-	                .text(function(d) { return d.name; });
+	  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
-	                .style('opacity', 0)
-	                .transition()
-	                .style('opacity', 1);
 
-	            items.order();
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
+	  /**
+	   * editOn().
+	   */
 
-	            items.exit()
-	                .remove();
-	        }
 
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
+	  /**
+	   * editOff().
+	   */
 
-	        function mouseover(d) {
-	            if (d.id === -1) { return; }
 
-	            utilHighlightEntities([d.id], true, context);
-	        }
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
+	  /**
+	   * click() Handles 'bubble' point click event.
+	   */
 
 
-	        function mouseout(d) {
-	            if (d.id === -1) { return; }
+	  function click(d3_event, d) {
+	    var service = getService();
+	    if (!service) return; // try to preserve the viewer rotation when staying on the same sequence
 
-	            utilHighlightEntities([d.id], false, context);
-	        }
+	    if (d.sequenceKey !== _selectedSequence) {
+	      _viewerYaw = 0; // reset
+	    }
 
+	    _selectedSequence = d.sequenceKey;
+	    service.ensureViewerLoaded(context).then(function () {
+	      service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
+	    });
+	    context.map().centerEase(d.loc);
+	  }
+	  /**
+	   * mouseover().
+	   */
 
-	        function click(d) {
-	            event.preventDefault();
 
-	            if (d.location) {
-	                context.map().centerZoomEase([d.location[1], d.location[0]], 19);
+	  function mouseover(d3_event, d) {
+	    var service = getService();
+	    if (service) service.setStyles(context, d);
+	  }
+	  /**
+	   * mouseout().
+	   */
 
-	            } else if (d.entity) {
-	                utilHighlightEntities([d.id], false, context);
 
-	                context.enter(modeSelect(context, [d.entity.id]));
-	                context.map().zoomToEase(d.entity);
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
+	  /**
+	   * transform().
+	   */
 
-	            } else {
-	                // download, zoom to, and select the entity with the given ID
-	                context.zoomToEntity(d.id);
-	            }
-	        }
 
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
+	    var rot = d.ca + _viewerYaw;
 
-	        function geocoderSearch() {
-	            services.geocoder.search(search.property('value'), function (err, resp) {
-	                _geocodeResults = resp || [];
-	                drawList();
-	            });
-	        }
+	    if (rot) {
+	      t += ' rotate(' + Math.floor(rot) + ',0,0)';
 	    }
 
+	    return t;
+	  }
 
-	    return featureList;
-	}
+	  function viewerChanged() {
+	    var service = getService();
+	    if (!service) return;
+	    var viewer = service.viewer();
+	    if (!viewer) return; // update viewfield rotation
 
-	function uiSectionEntityIssues(context) {
+	    _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
+	    // e.g. during drags or easing.
 
-	    var _entityIDs = [];
-	    var _issues = [];
-	    var _activeIssueID;
+	    if (context.map().isTransformed()) return;
+	    layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
+	  }
 
-	    var section = uiSection('entity-issues', context)
-	        .shouldDisplay(function() {
-	            return _issues.length > 0;
-	        })
-	        .title(function() {
-	            return _t('issues.list_title', { count: _issues.length });
-	        })
-	        .disclosureContent(renderDisclosureContent);
+	  context.photos().on('change.streetside', update);
 
-	    context.validator()
-	        .on('validated.entity_issues', function() {
-	            // Refresh on validated events
-	            reloadIssues();
-	            section.reRender();
-	        })
-	        .on('focusedIssue.entity_issues', function(issue) {
-	             makeActiveIssue(issue.id);
-	        });
+	  function filterBubbles(bubbles) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	    function reloadIssues() {
-	        _issues = context.validator().getSharedEntityIssues(_entityIDs, { includeDisabledRules: true });
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      bubbles = bubbles.filter(function (bubble) {
+	        return new Date(bubble.captured_at).getTime() >= fromTimestamp;
+	      });
 	    }
 
-	    function makeActiveIssue(issueID) {
-	        _activeIssueID = issueID;
-	        section.selection().selectAll('.issue-container')
-	            .classed('active', function(d) { return d.id === _activeIssueID; });
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      bubbles = bubbles.filter(function (bubble) {
+	        return new Date(bubble.captured_at).getTime() <= toTimestamp;
+	      });
 	    }
 
-	    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; });
+	    if (usernames) {
+	      bubbles = bubbles.filter(function (bubble) {
+	        return usernames.indexOf(bubble.captured_by) !== -1;
+	      });
+	    }
 
-	        // Exit
-	        containers.exit()
-	            .remove();
+	    return bubbles;
+	  }
 
-	        // Enter
-	        var containersEnter = containers.enter()
-	            .append('div')
-	            .attr('class', 'issue-container');
+	  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;
+	      });
+	    }
 
-	        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);
-	            });
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      sequences = sequences.filter(function (sequences) {
+	        return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	        var labelsEnter = itemsEnter
-	            .append('div')
-	            .attr('class', 'issue-label')
-	            .on('click', function(d) {
+	    if (usernames) {
+	      sequences = sequences.filter(function (sequences) {
+	        return usernames.indexOf(sequences.properties.captured_by) !== -1;
+	      });
+	    }
 
-	                makeActiveIssue(d.id); // expand only the clicked item
+	    return sequences;
+	  }
+	  /**
+	   * update().
+	   */
 
-	                var extent = d.extent(context.graph());
-	                if (extent) {
-	                    var setZoom = Math.max(context.map().zoom(), 19);
-	                    context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
-	                }
-	            });
 
-	        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));
-	            });
+	  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 = [];
 
-	        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);
-	                        });
-	                }
-	            });
+	    if (context.photos().showsPanoramic()) {
+	      sequences = service ? service.sequences(projection) : [];
+	      bubbles = service && showMarkers ? service.bubbles(projection) : [];
+	      sequences = filterSequences(sequences);
+	      bubbles = filterBubbles(bubbles);
+	    }
 
-	        itemsEnter
-	            .append('ul')
-	            .attr('class', 'issue-fix-list');
+	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+	      return d.properties.key;
+	    }); // exit
 
-	        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'));
-	                }
-	            });
+	    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(bubbles, function (d) {
+	      // force reenter once bubbles are attached to a sequence
+	      return d.key + (d.sequenceKey ? 'v1' : 'v0');
+	    }); // exit
 
-	        // Update
-	        containers = containers
-	            .merge(containersEnter)
-	            .classed('active', function(d) { return d.id === _activeIssueID; });
+	    groups.exit().remove(); // enter
 
-	        containers.selectAll('.issue-message')
-	            .text(function(d) {
-	                return d.message(context);
-	            });
+	    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
 
-	        // fixes
-	        var fixLists = containers.selectAll('.issue-fix-list');
+	    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
 
-	        var fixes = fixLists.selectAll('.issue-fix-item')
-	            .data(function(d) { return d.fixes ? d.fixes(context) : []; }, function(fix) { return fix.id; });
+	    viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
 
-	        fixes.exit()
-	            .remove();
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	        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; }
+	      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
+	   */
 
-	                // 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);
+	  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().
+	   */
 
-	                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);
-	            });
 
-	        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));
-	            });
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgStreetside.enabled;
+	    svgStreetside.enabled = _;
 
-	        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;
-	            });
+	    if (svgStreetside.enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
 	    }
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-	            _entityIDs = val;
-	            _activeIssueID = null;
-	            reloadIssues();
-	        }
-	        return section;
-	    };
+	    dispatch.call('change');
+	    return this;
+	  };
+	  /**
+	   * drawImages.supported().
+	   */
 
-	    return section;
-	}
 
-	function uiPresetIcon() {
-	  var _preset;
-	  var _geometry;
-	  var _sizeClass = 'medium';
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
+	  init();
+	  return drawImages;
+	}
 
-	  function isSmall() {
-	    return _sizeClass === 'small';
-	  }
+	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);
 
-	  function presetIcon(selection) {
-	    selection.each(render);
-	  }
+	  var _mapillary;
 
+	  var viewerCompassAngle;
 
-	  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 init() {
+	    if (svgMapillaryImages.initialized) return; // run once
 
-	    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');
+	    svgMapillaryImages.enabled = false;
+	    svgMapillaryImages.initialized = true;
 	  }
 
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	  function renderCircleFill(fillEnter) {
-	    var w = 60;
-	    var h = 60;
-	    var d = 40;
+	      _mapillary.event.on('loadedImages', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
+	    }
 
-	    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);
+	    return _mapillary;
 	  }
 
-
-	  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;
-
-	    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));
-
-	    ['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));
-	    });
-
-	    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);
+	  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');
 	    });
-
-	    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);
-	      });
-	    }
 	  }
 
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
 
-	  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;
-
-	    lineEnter = lineEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-line')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h));
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	    ['casing', 'stroke'].forEach(function (klass) {
-	      lineEnter
-	        .append('path')
-	        .attr('d', ("M" + x1 + " " + y + " L" + x2 + " " + y))
-	        .attr('class', ("line " + klass));
-	    });
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
-	    [[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);
+	  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);
+	  }
 
-	  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;
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
 
-	    routeEnter = routeEnter
-	      .append('svg')
-	      .attr('class', 'preset-icon-route')
-	      .attr('width', w)
-	      .attr('height', h)
-	      .attr('viewBox', ("0 0 " + w + " " + h));
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	    ['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));
-	    });
+	    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)';
+	    }
 
-	    [[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);
-	    });
+	    return t;
 	  }
 
+	  context.photos().on('change.mapillary_images', update);
 
-	  // 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']
-	  };
+	  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 (!showsPano || !showsFlat) {
+	      images = images.filter(function (image) {
+	        if (image.pano) return showsPano;
+	        return showsFlat;
+	      });
+	    }
 
-	  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';
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      images = images.filter(function (image) {
+	        return new Date(image.captured_at).getTime() >= fromTimestamp;
+	      });
 	    }
 
-	    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);
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      images = images.filter(function (image) {
+	        return new Date(image.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	    var tags = !isCategory ? p.setTags({}, geom) : {};
-	    for (var k in tags) {
-	      if (tags[k] === '*') {
-	        tags[k] = 'yes';
-	      }
+	    if (usernames) {
+	      images = images.filter(function (image) {
+	        return usernames.indexOf(image.captured_by) !== -1;
+	      });
 	    }
 
-	    var tagClasses = svgTagClasses().getClassesString(tags, '');
-	    var selection = select(this);
+	    return images;
+	  }
 
-	    var container = selection.selectAll('.preset-icon-container')
-	      .data([0]);
+	  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();
 
-	    container = container.enter()
-	      .append('div')
-	      .attr('class', ("preset-icon-container " + _sizeClass))
-	      .merge(container);
+	    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);
 
-	    container
-	      .classed('showing-img', !!imageURL)
-	      .classed('fallback', isFallback);
+	              if (image && image.hasOwnProperty('pano')) {
+	                if (image.pano) return showsPano;
+	                return showsFlat;
+	              }
+	            }
+	          }
+	        }
 
+	        return false;
+	      });
+	    }
 
-	    var pointBorder = container.selectAll('.preset-icon-point-border')
-	      .data(drawPoint ? [0] : []);
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      sequences = sequences.filter(function (sequence) {
+	        return new Date(sequence.properties.captured_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
-	    pointBorder.exit()
-	      .remove();
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      sequences = sequences.filter(function (sequence) {
+	        return new Date(sequence.properties.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	    var pointBorderEnter = pointBorder.enter();
-	    renderPointBorder(pointBorderEnter);
-	    pointBorder = pointBorderEnter.merge(pointBorder);
+	    if (usernames) {
+	      sequences = sequences.filter(function (sequence) {
+	        return usernames.indexOf(sequence.properties.username) !== -1;
+	      });
+	    }
 
+	    return sequences;
+	  }
 
-	    var vertexFill = container.selectAll('.preset-icon-fill-vertex')
-	      .data(drawVertex ? [0] : []);
+	  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);
 
-	    vertexFill.exit()
-	      .remove();
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	    var vertexFillEnter = vertexFill.enter();
-	    renderCircleFill(vertexFillEnter);
-	    vertexFill = vertexFillEnter.merge(vertexFill);
+	      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();
+	      }
+	    }
+	  }
 
-	    var fill = container.selectAll('.preset-icon-fill-area')
-	      .data(drawArea ? [0] : []);
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgMapillaryImages.enabled;
+	    svgMapillaryImages.enabled = _;
 
-	    fill.exit()
-	      .remove();
+	    if (svgMapillaryImages.enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	    var fillEnter = fill.enter();
-	    renderSquareFill(fillEnter);
-	    fill = fillEnter.merge(fill);
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    fill.selectAll('path.stroke')
-	      .attr('class', ("area stroke " + tagClasses));
-	    fill.selectAll('path.fill')
-	      .attr('class', ("area fill " + tagClasses));
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
+	  init();
+	  return drawImages;
+	}
 
-	    var line = container.selectAll('.preset-icon-line')
-	      .data(drawLine ? [0] : []);
+	function svgMapillaryPosition(projection, context) {
+	  var throttledRedraw = throttle(function () {
+	    update();
+	  }, 1000);
 
-	    line.exit()
-	      .remove();
+	  var minZoom = 12;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	    var lineEnter = line.enter();
-	    renderLine(lineEnter);
-	    line = lineEnter.merge(line);
+	  var _mapillary;
 
-	    line.selectAll('path.stroke')
-	      .attr('class', ("line stroke " + tagClasses));
-	    line.selectAll('path.casing')
-	      .attr('class', ("line casing " + tagClasses));
+	  var viewerCompassAngle;
 
+	  function init() {
+	    if (svgMapillaryPosition.initialized) return; // run once
 
-	    var route = container.selectAll('.preset-icon-route')
-	      .data(drawRoute ? [0] : []);
+	    svgMapillaryPosition.initialized = true;
+	  }
 
-	    route.exit()
-	      .remove();
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	    var routeEnter = route.enter();
-	    renderRoute(routeEnter);
-	    route = routeEnter.merge(route);
+	      _mapillary.event.on('nodeChanged', throttledRedraw);
 
-	    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));
-	      }
+	      _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;
 	    }
 
+	    return _mapillary;
+	  }
 
-	    var icon = container.selectAll('.preset-icon')
-	      .data(picon ? [0] : []);
-
-	    icon.exit()
-	      .remove();
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	    icon = icon.enter()
-	      .append('div')
-	      .attr('class', 'preset-icon')
-	      .call(svgIcon(''))
-	      .merge(icon);
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
 
-	    icon
-	      .attr('class', 'preset-icon ' + (geom ? geom + '-geom' : ''))
-	      .classed('framed', isFramed)
-	      .classed('preset-icon-iD', isiDIcon);
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	    icon.selectAll('svg')
-	      .attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line'  ? '' : tagClasses));
+	    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)';
+	    }
 
-	    icon.selectAll('use')
-	      .attr('href', '#' + picon + (isMaki ? (isSmall() && geom === 'point' ? '-11' : '-15') : ''));
+	    return t;
+	  }
 
-	    var imageIcon = container.selectAll('img.image-icon')
-	      .data(imageURL ? [0] : []);
+	  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
 
-	    imageIcon.exit()
-	      .remove();
+	    groups.exit().remove(); // enter
 
-	    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);
+	    var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
+	    groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-	    imageIcon
-	      .attr('src', imageURL);
-	  }
+	    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);
 
+	    function viewfieldPath() {
+	      var d = this.parentNode.__data__;
 
-	  presetIcon.preset = function(val) {
-	    if (!arguments.length) { return _preset; }
-	    _preset = utilFunctor(val);
-	    return presetIcon;
-	  };
+	      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();
+	    }
+	  }
 
-	  presetIcon.geometry = function(val) {
-	    if (!arguments.length) { return _geometry; }
-	    _geometry = utilFunctor(val);
-	    return presetIcon;
+	  drawImages.enabled = function () {
+	    update();
+	    return this;
 	  };
 
-
-	  presetIcon.sizeClass = function(val) {
-	    if (!arguments.length) { return _sizeClass; }
-	    _sizeClass = val;
-	    return presetIcon;
+	  drawImages.supported = function () {
+	    return !!getService();
 	  };
 
-	  return presetIcon;
+	  init();
+	  return drawImages;
 	}
 
-	function uiSectionFeatureType(context) {
-
-	    var dispatch$1 = dispatch('choose');
-
-	    var _entityIDs = [];
-	    var _presets = [];
-
-	    var _tagReference;
-
-	    var section = uiSection('feature-type', context)
-	        .title(_t('inspector.feature_type'))
-	        .disclosureContent(renderDisclosureContent);
-
-	    function renderDisclosureContent(selection) {
+	function svgMapillarySigns(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	        selection.classed('preset-list-item', true);
-	        selection.classed('mixed-types', _presets.length > 1);
+	  var minZoom = 12;
+	  var layer = select(null);
 
-	        var presetButtonWrap = selection
-	            .selectAll('.preset-list-button-wrap')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'preset-list-button-wrap');
+	  var _mapillary;
 
-	        var presetButton = presetButtonWrap
-	            .append('button')
-	            .attr('class', 'preset-list-button preset-reset')
-	            .call(uiTooltip()
-	                .title(_t('inspector.back_tooltip'))
-	                .placement('bottom')
-	            );
+	  function init() {
+	    if (svgMapillarySigns.initialized) return; // run once
 
-	        presetButton.append('div')
-	            .attr('class', 'preset-icon-container');
+	    svgMapillarySigns.enabled = false;
+	    svgMapillarySigns.initialized = true;
+	  }
 
-	        presetButton
-	            .append('div')
-	            .attr('class', 'label')
-	            .append('div')
-	            .attr('class', 'label-inner');
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	        presetButtonWrap.append('div')
-	            .attr('class', 'accessory-buttons');
+	      _mapillary.event.on('loadedSigns', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
+	    }
 
-	        var tagReferenceBodyWrap = selection
-	            .selectAll('.tag-reference-body-wrap')
-	            .data([0]);
+	    return _mapillary;
+	  }
 
-	        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 showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    service.loadSignResources(context);
+	    editOn();
+	  }
 
-	        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'))
-	            );
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    editOff();
+	  }
 
-	        // 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 editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	        var label = selection.select('.label-inner');
-	        var nameparts = label.selectAll('.namepart')
-	            .data(names, function(d) { return d; });
+	  function editOff() {
+	    layer.selectAll('.icon-sign').remove();
+	    layer.style('display', 'none');
+	  }
 
-	        nameparts.exit()
-	            .remove();
+	  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;
+	      }
+	    });
 
-	        nameparts
-	            .enter()
-	            .append('div')
-	            .attr('class', 'namepart')
-	            .text(function(d) { return d; });
+	    if (imageKey === selectedImageKey) {
+	      service.highlightDetection(highlightedDetection).selectImage(context, imageKey);
+	    } else {
+	      service.ensureViewerLoaded(context).then(function () {
+	        service.highlightDetection(highlightedDetection).selectImage(context, imageKey).showViewer(context);
+	      });
 	    }
+	  }
 
-	    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
-	        if (!utilArrayIdentical(val, _presets)) {
-	            _presets = val;
-
-	            var geometries = entityGeometries();
-	            if (_presets.length === 1 && geometries.length) {
-	                _tagReference = uiTagReference(_presets[0].reference(geometries[0]))
-	                    .showing(false);
-	            }
-	        }
+	  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
 
-	        return section;
-	    };
+	    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;
+	      });
 
-	    function entityGeometries() {
+	      if (aSelected === bSelected) {
+	        return b.loc[1] - a.loc[1]; // sort Y
+	      } else if (aSelected) {
+	        return 1;
+	      }
 
-	        var counts = {};
+	      return -1;
+	    });
+	  }
 
-	        for (var i in _entityIDs) {
-	            var geometry = context.graph().geometry(_entityIDs[i]);
-	            if (!counts[geometry]) { counts[geometry] = 0; }
-	            counts[geometry] += 1;
-	        }
+	  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);
 
-	        return Object.keys(counts).sort(function(geom1, geom2) {
-	            return counts[geom2] - counts[geom1];
-	        });
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadSigns(projection);
+	        service.showSignDetections(true);
+	      } else {
+	        editOff();
+	      }
+	    } else if (service) {
+	      service.showSignDetections(false);
 	    }
+	  }
 
-	    return utilRebind(section, dispatch$1, 'on');
-	}
-
-	// This currently only works with the 'restrictions' field
-	// It borrows some code from uiHelp
+	  drawSigns.enabled = function (_) {
+	    if (!arguments.length) return svgMapillarySigns.enabled;
+	    svgMapillarySigns.enabled = _;
 
-	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 (svgMapillarySigns.enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	    var fieldHelpHeadings = {};
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    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')
-	    };
+	  drawSigns.supported = function () {
+	    return !!getService();
+	  };
 
+	  init();
+	  return drawSigns;
+	}
 
-	    // 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';
-	        }, '');
+	function svgMapillaryMapFeatures(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	        return {
-	            key: helpkey,
-	            title: _t(helpkey + '.title'),
-	            html: marked_1(text.trim())
-	        };
-	    });
+	  var minZoom = 12;
+	  var layer = select(null);
 
+	  var _mapillary;
 
-	    function show() {
-	        updatePosition();
+	  function init() {
+	    if (svgMapillaryMapFeatures.initialized) return; // run once
 
-	        _body
-	            .classed('hide', false)
-	            .style('opacity', '0')
-	            .transition()
-	            .duration(200)
-	            .style('opacity', '1');
-	    }
+	    svgMapillaryMapFeatures.enabled = false;
+	    svgMapillaryMapFeatures.initialized = true;
+	  }
 
+	  function getService() {
+	    if (services.mapillary && !_mapillary) {
+	      _mapillary = services.mapillary;
 
-	    function hide() {
-	        _body
-	            .classed('hide', true)
-	            .transition()
-	            .duration(200)
-	            .style('opacity', '0')
-	            .on('end', function () {
-	                _body.classed('hide', true);
-	            });
+	      _mapillary.event.on('loadedMapFeatures', throttledRedraw);
+	    } else if (!services.mapillary && _mapillary) {
+	      _mapillary = null;
 	    }
 
+	    return _mapillary;
+	  }
 
-	    function clickHelp(index) {
-	        var d = docs[index];
-	        var tkeys = fieldHelpKeys[fieldName][index][1];
+	  function showLayer() {
+	    var service = getService();
+	    if (!service) return;
+	    service.loadObjectResources(context);
+	    editOn();
+	  }
 
-	        _body.selectAll('.field-help-nav-item')
-	            .classed('active', function(d, i) { return i === index; });
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    editOff();
+	  }
 
-	        var content = _body.selectAll('.field-help-content')
-	            .html(d.html);
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
 
-	        // class the paragraphs so we can find and style them
-	        content.selectAll('p')
-	            .attr('class', function(d, i) { return tkeys[i]; });
+	  function editOff() {
+	    layer.selectAll('.icon-map-feature').remove();
+	    layer.style('display', 'none');
+	  }
 
-	        // 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 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;
+	      }
+	    });
 
-	        } 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'));
-	        }
+	    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.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';
+	      }
+
+	      return '#' + d.value;
+	    });
+	    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;
+	      });
 
-	    fieldHelp.button = function(selection) {
-	        if (_body.empty()) { return; }
+	      if (aSelected === bSelected) {
+	        return b.loc[1] - a.loc[1]; // sort Y
+	      } else if (aSelected) {
+	        return 1;
+	      }
 
-	        var button = selection.selectAll('.field-help-button')
-	            .data([0]);
+	      return -1;
+	    });
+	  }
 
-	        // 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 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);
 
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadMapFeatures(projection);
+	        service.showFeatureDetections(true);
+	      } else {
+	        editOff();
+	      }
+	    } else if (service) {
+	      service.showFeatureDetections(false);
+	    }
+	  }
 
-	    function updatePosition() {
-	        var wrap = _wrap.node();
-	        var inspector = _inspector.node();
-	        var wRect = wrap.getBoundingClientRect();
-	        var iRect = inspector.getBoundingClientRect();
+	  drawMapFeatures.enabled = function (_) {
+	    if (!arguments.length) return svgMapillaryMapFeatures.enabled;
+	    svgMapillaryMapFeatures.enabled = _;
 
-	        _body
-	            .style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
+	    if (svgMapillaryMapFeatures.enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
 	    }
 
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	    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; }
+	  drawMapFeatures.supported = function () {
+	    return !!getService();
+	  };
 
-	        // 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; }
+	  init();
+	  return drawMapFeatures;
+	}
 
-	        _body = _inspector.selectAll('.field-help-body')
-	            .data([0]);
+	function svgOpenstreetcamImages(projection, context, dispatch) {
+	  var throttledRedraw = throttle(function () {
+	    dispatch.call('change');
+	  }, 1000);
 
-	        var enter = _body.enter()
-	            .append('div')
-	            .attr('class', 'field-help-body hide');   // initially hidden
+	  var minZoom = 12;
+	  var minMarkerZoom = 16;
+	  var minViewfieldZoom = 18;
+	  var layer = select(null);
 
-	        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');
+	  var _openstreetcam;
 
-	        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);
-	            });
+	  function init() {
+	    if (svgOpenstreetcamImages.initialized) return; // run once
 
-	        enter
-	            .append('div')
-	            .attr('class', 'field-help-content');
+	    svgOpenstreetcamImages.enabled = false;
+	    svgOpenstreetcamImages.initialized = true;
+	  }
 
-	        _body = _body
-	            .merge(enter);
+	  function getService() {
+	    if (services.openstreetcam && !_openstreetcam) {
+	      _openstreetcam = services.openstreetcam;
 
-	        clickHelp(0);
-	    };
+	      _openstreetcam.event.on('loadedImages', throttledRedraw);
+	    } else if (!services.openstreetcam && _openstreetcam) {
+	      _openstreetcam = null;
+	    }
 
+	    return _openstreetcam;
+	  }
 
-	    return fieldHelp;
-	}
+	  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 uiFieldCheck(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var options = field.strings && field.strings.options;
-	    var values = [];
-	    var texts = [];
+	  function hideLayer() {
+	    throttledRedraw.cancel();
+	    layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+	  }
 
-	    var _tags;
+	  function editOn() {
+	    layer.style('display', 'block');
+	  }
+
+	  function editOff() {
+	    layer.selectAll('.viewfield-group').remove();
+	    layer.style('display', 'none');
+	  }
+
+	  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);
+	  }
 
-	    var input = select(null);
-	    var text = select(null);
-	    var label = select(null);
-	    var reverser = select(null);
+	  function mouseover(d3_event, d) {
+	    var service = getService();
+	    if (service) service.setStyles(context, d);
+	  }
 
-	    var _impliedYes;
-	    var _entityIDs = [];
-	    var _value;
+	  function mouseout() {
+	    var service = getService();
+	    if (service) service.setStyles(context, null);
+	  }
 
+	  function transform(d) {
+	    var t = svgPointTransform(projection)(d);
 
-	    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'));
-	        }
+	    if (d.ca) {
+	      t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
 	    }
 
+	    return t;
+	  }
 
-	    // Checks tags to see whether an undefined value is "Assumed to be Yes"
-	    function checkImpliedYes() {
-	        _impliedYes = (field.id === 'oneway_yes');
+	  context.photos().on('change.openstreetcam_images', update);
 
-	        // 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;
-	                }
-	            }
-	        }
+	  function filterImages(images) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
+
+	    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;
+	      });
+	    }
 
-	    function reverserHidden() {
-	        if (!context.container().select('div.inspector-hover').empty()) { return true; }
-	        return !(_value === 'yes' || (_impliedYes && !_value));
+	    if (usernames) {
+	      images = images.filter(function (item) {
+	        return usernames.indexOf(item.captured_by) !== -1;
+	      });
 	    }
 
+	    return images;
+	  }
 
-	    function reverserSetText(selection) {
-	        var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
-	        if (reverserHidden() || !entity) { return selection; }
+	  function filterSequences(sequences) {
+	    var fromDate = context.photos().fromDate();
+	    var toDate = context.photos().toDate();
+	    var usernames = context.photos().usernames();
 
-	        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';
+	    if (fromDate) {
+	      var fromTimestamp = new Date(fromDate).getTime();
+	      sequences = sequences.filter(function (image) {
+	        return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
+	      });
+	    }
 
-	        selection.selectAll('.reverser-span')
-	            .text(_t('inspector.check.reverser'))
-	            .call(svgIcon(icon, 'inline'));
+	    if (toDate) {
+	      var toTimestamp = new Date(toDate).getTime();
+	      sequences = sequences.filter(function (image) {
+	        return new Date(image.properties.captured_at).getTime() <= toTimestamp;
+	      });
+	    }
 
-	        return selection;
+	    if (usernames) {
+	      sequences = sequences.filter(function (image) {
+	        return usernames.indexOf(image.properties.captured_by) !== -1;
+	      });
 	    }
 
+	    return sequences;
+	  }
 
-	    var check = function(selection) {
-	        checkImpliedYes();
+	  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 = [];
 
-	        label = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    if (context.photos().showsFlat()) {
+	      sequences = service ? service.sequences(projection) : [];
+	      images = service && showMarkers ? service.images(projection) : [];
+	      sequences = filterSequences(sequences);
+	      images = filterImages(images);
+	    }
 
-	        var enter = label.enter()
-	            .append('label')
-	            .attr('class', 'form-field-input-wrap form-field-input-check');
+	    var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+	      return d.properties.key;
+	    }); // exit
 
-	        enter
-	            .append('input')
-	            .property('indeterminate', field.type !== 'defaultCheck')
-	            .attr('type', 'checkbox')
-	            .attr('id', field.domId);
+	    traces.exit().remove(); // enter/update
 
-	        enter
-	            .append('span')
-	            .text(texts[0])
-	            .attr('class', 'value');
+	    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
 
-	        if (field.type === 'onewayCheck') {
-	            enter
-	                .append('a')
-	                .attr('class', 'reverser button' + (reverserHidden() ? ' hide' : ''))
-	                .attr('href', '#')
-	                .append('span')
-	                .attr('class', 'reverser-span');
-	        }
+	    groups.exit().remove(); // enter
 
-	        label = label.merge(enter);
-	        input = label.selectAll('input');
-	        text = label.selectAll('span.value');
+	    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
 
-	        input
-	            .on('click', function() {
-	                event.stopPropagation();
-	                var t = {};
+	    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');
+	  }
 
-	                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];
-	                }
+	  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);
 
-	                // 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];
-	                }
+	    if (enabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        update();
+	        service.loadImages(projection);
+	      } else {
+	        editOff();
+	      }
+	    }
+	  }
 
-	                dispatch$1.call('change', this, t);
-	            });
+	  drawImages.enabled = function (_) {
+	    if (!arguments.length) return svgOpenstreetcamImages.enabled;
+	    svgOpenstreetcamImages.enabled = _;
 
-	        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();
+	    if (svgOpenstreetcamImages.enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	                    select(this)
-	                        .call(reverserSetText);
-	                });
-	        }
-	    };
+	    dispatch.call('change');
+	    return this;
+	  };
 
+	  drawImages.supported = function () {
+	    return !!getService();
+	  };
 
-	    check.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return check;
-	    };
+	  init();
+	  return drawImages;
+	}
 
+	function svgOsm(projection, context, dispatch) {
+	  var enabled = true;
 
-	    check.tags = function(tags) {
+	  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;
+	    });
+	  }
 
-	        _tags = tags;
+	  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 isChecked(val) {
-	            return val !== 'no' && val !== '' && val !== undefined && val !== null;
-	        }
+	  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');
+	    });
+	  }
 
-	        function textFor(val) {
-	            if (val === '') { val = undefined; }
-	            var index = values.indexOf(val);
-	            return (index !== -1 ? texts[index] : ('"' + val + '"'));
-	        }
+	  drawOsm.enabled = function (val) {
+	    if (!arguments.length) return enabled;
+	    enabled = val;
 
-	        checkImpliedYes();
+	    if (enabled) {
+	      showLayer();
+	    } else {
+	      hideLayer();
+	    }
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	    dispatch.call('change');
+	    return this;
+	  };
 
-	        _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
+	  return drawOsm;
+	}
 
-	        if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
-	            _value = 'yes';
-	        }
+	var _notesEnabled = false;
 
-	        input
-	            .property('indeterminate', isMixed || (field.type !== 'defaultCheck' && !_value))
-	            .property('checked', isChecked(_value));
+	var _osmService;
 
-	        text
-	            .text(isMixed ? _t('inspector.multiple_values') : textFor(_value))
-	            .classed('mixed', isMixed);
+	function svgNotes(projection, context, dispatch$1) {
+	  if (!dispatch$1) {
+	    dispatch$1 = dispatch('change');
+	  }
 
-	        label
-	            .classed('set', !!_value);
+	  var throttledRedraw = throttle(function () {
+	    dispatch$1.call('change');
+	  }, 1000);
 
-	        if (field.type === 'onewayCheck') {
-	            reverser
-	                .classed('hide', reverserHidden())
-	                .call(reverserSetText);
-	        }
-	    };
+	  var minZoom = 12;
+	  var touchLayer = select(null);
+	  var drawLayer = select(null);
+	  var _notesVisible = false;
 
+	  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.
 
-	    check.focus = function() {
-	        input.node().focus();
-	    };
 
-	    return utilRebind(check, dispatch$1, 'on');
-	}
+	  function getService() {
+	    if (services.osm && !_osmService) {
+	      _osmService = services.osm;
 
-	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(';');
+	      _osmService.on('loadedNotes', throttledRedraw);
+	    } else if (!services.osm && _osmService) {
+	      _osmService = null;
 	    }
 
+	    return _osmService;
+	  } // Show the notes
 
-	    // 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 || '');
 
-	        if (optstrings) {
-	            var found = _comboData.find(function(o) {
-	                return o.key && clean(o.value) === dval;
-	            });
-	            if (found) {
-	                return found.key;
-	            }
-	        }
+	  function editOn() {
+	    if (!_notesVisible) {
+	      _notesVisible = true;
+	      drawLayer.style('display', 'block');
+	    }
+	  } // Immediately remove the notes and their touch targets
 
-	        if (field.type === 'typeCombo' && !dval) {
-	            return 'yes';
-	        }
 
-	        return (snake_case ? snake(dval) : dval) || undefined;
+	  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.
 
 
-	    // 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 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.
 
-	        if (optstrings) {
-	            var found = _comboData.find(function(o) {
-	                return o.key === tval && o.value;
-	            });
-	            if (found) {
-	                return found.value;
-	            }
-	        }
 
-	        if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
-	            return '';
-	        }
+	  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
 
-	        return snake_case ? unsnake(tval) : tval;
-	    }
 
+	  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..
 
-	    // 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;
-	            });
-	        });
-	    }
+	    var notes = drawLayer.selectAll('.note').data(data, function (d) {
+	      return d.status + d.id;
+	    }); // exit
 
+	    notes.exit().remove(); // enter
 
-	    function initCombo(selection, attachTo) {
-	        if (optstrings) {
-	            selection.attr('readonly', 'readonly');
-	            selection.call(combobox, attachTo);
-	            setStaticValues(setPlaceholder);
+	    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
 
-	        } else if (optarray) {
-	            selection.call(combobox, attachTo);
-	            setStaticValues(setPlaceholder);
+	    targets.exit().remove(); // enter/update
 
-	        } else if (taginfo) {
-	            selection.call(combobox.fetcher(setTaginfoValues), attachTo);
-	            setTaginfoValues('', setPlaceholder);
-	        }
+	    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 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.
 
 
-	    function setStaticValues(callback) {
-	        if (!(optstrings || optarray)) { return; }
+	  function drawNotes(selection) {
+	    var service = getService();
+	    var surface = context.surface();
 
-	        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 (surface && !surface.empty()) {
+	      touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+	    }
 
-	        } else if (optarray) {
-	            _comboData = optarray.map(function(k) {
-	                var v = snake_case ? unsnake(k) : k;
-	                return {
-	                    key: k,
-	                    value: v,
-	                    title: v
-	                };
-	            });
-	        }
+	    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);
 
-	        combobox.data(objectDifference(_comboData, _multiData));
-	        if (callback) { callback(_comboData); }
+	    if (_notesEnabled) {
+	      if (service && ~~context.map().zoom() >= minZoom) {
+	        editOn();
+	        service.loadNotes(projection);
+	        updateMarkers();
+	      } else {
+	        editOff();
+	      }
 	    }
+	  } // Toggles the layer on and off
 
 
-	    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 + ':';
-	        }
+	  drawNotes.enabled = function (val) {
+	    if (!arguments.length) return _notesEnabled;
+	    _notesEnabled = val;
 
-	        var params = {
-	            debounce: (q !== ''),
-	            key: field.key,
-	            query: query
-	        };
+	    if (_notesEnabled) {
+	      layerOn();
+	    } else {
+	      layerOff();
 
-	        if (_entityIDs.length) {
-	            params.geometry = context.graph().geometry(_entityIDs[0]);
-	        }
+	      if (context.selectedNoteID()) {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
+
+	    dispatch$1.call('change');
+	    return this;
+	  };
 
-	        taginfo[fn](params, function(err, data) {
-	            if (err) { return; }
+	  return drawNotes;
+	}
 
-	            data = data.filter(function(d) {
+	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;
+	    });
+	  }
 
-	                if (field.type === 'typeCombo' && d.value === 'yes') {
-	                    // don't show the fallback value
-	                    return false;
-	                }
+	  return drawTouch;
+	}
 
-	                // don't show values with very low usage
-	                return !d.count || d.count > 10;
-	            });
+	function refresh(selection, node) {
+	  var cr = node.getBoundingClientRect();
+	  var prop = [cr.width, cr.height];
+	  selection.property('__dimensions__', prop);
+	  return prop;
+	}
 
-	            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;
-	                });
-	            }
+	function utilGetDimensions(selection, force) {
+	  if (!selection || selection.empty()) {
+	    return [0, 0];
+	  }
 
-	            if (hasCountryPrefix) {
-	                data = data.filter(function(d) {
-	                    return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
-	                });
-	            }
+	  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;
+	  }
 
-	            // 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
-	                };
-	            });
+	  var node = selection.node();
 
-	            _comboData = objectDifference(_comboData, _multiData);
-	            if (callback) { callback(_comboData); }
-	        });
-	    }
+	  if (dimensions === null) {
+	    refresh(selection, node);
+	    return selection;
+	  }
 
+	  return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
+	}
 
-	    function setPlaceholder(values) {
+	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);
+	    });
+	  }
 
-	        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; });
+	  drawLayers.all = function () {
+	    return _layers;
+	  };
 
-	            var placeholders = vals.length > 1 ? vals : values.map(function(d) { return d.key; });
-	            _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
-	        }
+	  drawLayers.layer = function (id) {
+	    var obj = _layers.find(function (o) {
+	      return o.id === id;
+	    });
 
-	        if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
-	            _staticPlaceholder += '…';
-	        }
+	    return obj && obj.layer;
+	  };
 
-	        var ph;
-	        if (!isMulti && !isSemi && _tags && Array.isArray(_tags[field.key])) {
-	            ph = _t('inspector.multiple_values');
-	        } else {
-	            ph =  _staticPlaceholder;
-	        }
+	  drawLayers.only = function (what) {
+	    var arr = [].concat(what);
 
-	        container.selectAll('input')
-	            .attr('placeholder', ph);
-	    }
+	    var all = _layers.map(function (layer) {
+	      return layer.id;
+	    });
 
+	    return drawLayers.remove(utilArrayDifference(all, arr));
+	  };
 
-	    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';
-	                });
+	  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;
+	  };
 
-	            } 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(';'));
-	            }
+	  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;
+	  };
 
-	            window.setTimeout(function() { input.node().focus(); }, 10);
+	  drawLayers.dimensions = function (val) {
+	    if (!arguments.length) return utilGetDimensions(svg);
+	    utilSetDimensions(svg, val);
+	    return this;
+	  };
 
-	        } else {
-	            var rawValue = utilGetSetValue(input);
+	  return utilRebind(drawLayers, dispatch$1, 'on');
+	}
 
-	            // don't override multiple values with blank string
-	            if (!rawValue && Array.isArray(_tags[field.key])) { return; }
+	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;
+	      }
 
-	            val = context.cleanTagValue(tagValue(rawValue));
-	            t[field.key] = val || undefined;
-	        }
+	      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
 
-	        dispatch$1.call('change', this, t);
-	    }
 
+	    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
 
-	    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);
+	    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
 
-	            arr = utilArrayUniq(arr);
-	            t[field.key] = arr.length ? arr.join(';') : undefined;
-	        }
-	        dispatch$1.call('change', this, t);
-	    }
+	    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 combo(selection) {
-	        container = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    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;
 
-	        var type = (isMulti || isSemi) ? 'multicombo': 'combo';
-	        container = container.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + type)
-	            .merge(container);
+	      if (a.tags.highway) {
+	        scoreA -= highway_stack[a.tags.highway];
+	      }
 
-	        if (isMulti || isSemi) {
-	            container = container.selectAll('.chiplist')
-	                .data([0]);
+	      if (b.tags.highway) {
+	        scoreB -= highway_stack[b.tags.highway];
+	      }
 
-	            var listClass = 'chiplist';
+	      return scoreA - scoreB;
+	    }
 
-	            // 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 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.
 
-	            container = container.enter()
-	                .append('ul')
-	                .attr('class', listClass)
-	                .on('click', function() {
-	                    window.setTimeout(function() { input.node().focus(); }, 10);
-	                })
-	                .merge(container);
+	      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
 
-	            inputWrap = container.selectAll('.input-wrap')
-	                .data([0]);
+	          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';
+	          }
+	        }
 
-	            inputWrap = inputWrap.enter()
-	                .append('li')
-	                .attr('class', 'input-wrap')
-	                .merge(inputWrap);
+	        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;
+	    }
 
-	            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;
-	                }
-	            });
+	    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;
+	        });
+	      };
+	    }
 
-	        if (isMulti || isSemi) {
-	            combobox
-	                .on('accept', function() {
-	                    input.node().blur();
-	                    input.node().focus();
-	                });
+	    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;
+	      });
 
-	            input
-	                .on('focus', function() { container.classed('active', true); });
-	        }
+	      if (detected.ie) {
+	        markers.each(function () {
+	          this.parentNode.insertBefore(this, this);
+	        });
+	      }
 	    }
 
+	    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);
+	      }
+	    }
 
-	    combo.tags = function(tags) {
-	        _tags = tags;
+	    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
 
-	        if (isMulti || isSemi) {
-	            _multiData = [];
+	    var uncovered = selection.selectAll('.layer-osm.lines'); // over areas
 
-	            var maxLength;
+	    var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..
 
-	            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; }
+	    [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..
 
-	                    var suffix = k.substring(field.key.length);
-	                    _multiData.push({
-	                        key: k,
-	                        value: displayValue(suffix),
-	                        isMixed: Array.isArray(v)
-	                    });
-	                }
+	    touchLayer.call(drawTargets, graph, ways, filter);
+	  }
 
-	                // Set keys for form-field modified (needed for undo and reset buttons)..
-	                field.keys = _multiData.map(function(d) { return d.key; });
+	  return drawLines;
+	}
 
-	                // limit the input length so it fits after prepending the key prefix
-	                maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+	function svgMidpoints(projection, context) {
+	  var targetRadius = 8;
 
-	            } else if (isSemi) {
+	  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
 
-	                var allValues = [];
-	                var commonValues;
-	                if (Array.isArray(tags[field.key])) {
+	    targets.exit().remove(); // enter/update
 
-	                    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);
+	    targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
+	      return 'node midpoint target ' + fillClass + d.id;
+	    }).attr('transform', getTransform);
+	  }
 
-	                } else {
-	                    allValues =  utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
-	                    commonValues = allValues;
-	                }
+	  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();
 
-	                _multiData = allValues.map(function(v) {
-	                    return {
-	                        key: v,
-	                        value: displayValue(v),
-	                        isMixed: !commonValues.includes(v)
-	                    };
-	                });
+	    if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
+	      drawLayer.selectAll('.midpoint').remove();
+	      touchLayer.selectAll('.midpoint.target').remove();
+	      return;
+	    }
 
-	                var currLength = utilUnicodeCharsCount(commonValues.join(';'));
+	    var poly = extent.polygon();
+	    var midpoints = {};
 
-	                // limit the input length to the remaining available characters
-	                maxLength = context.maxCharsForTagValue() - currLength;
+	    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);
 
-	                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);
+	      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('-');
 
-	            var allowDragAndDrop = isSemi // only semiCombo values are ordered
-	                && !Array.isArray(tags[field.key]);
+	        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;
 
-	            // Exclude existing multikeys from combo options..
-	            var available = objectDifference(_comboData, _multiData);
-	            combobox.data(available);
+	          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]]);
 
-	            // 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);
+	              if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
+	                loc = point;
+	                break;
+	              }
+	            }
+	          }
 
+	          if (loc) {
+	            midpoints[id] = {
+	              type: 'midpoint',
+	              id: id,
+	              loc: loc,
+	              edge: [a.id, b.id],
+	              parents: [entity]
+	            };
+	          }
+	        }
+	      }
+	    }
 
-	            // Render chips
-	            var chips = container.selectAll('.chip')
-	                .data(_multiData);
+	    function midpointFilter(d) {
+	      if (midpoints[d.id]) return true;
 
-	            chips.exit()
-	                .remove();
+	      for (var i = 0; i < d.parents.length; i++) {
+	        if (filter(d.parents[i])) {
+	          return true;
+	        }
+	      }
 
-	            var enter = chips.enter()
-	                .insert('li', '.input-wrap')
-	                .attr('class', 'chip');
+	      return false;
+	    }
 
-	            enter.append('span');
-	            enter.append('a');
+	    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.
 
-	            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;
-	                });
+	    groups.select('polygon.shadow');
+	    groups.select('polygon.fill'); // Draw touch targets..
 
-	            if (allowDragAndDrop) {
-	                registerDragAndDrop(chips);
-	            }
+	    touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+	  }
 
-	            chips.select('span')
-	                .text(function(d) { return d.value; });
+	  return drawMidpoints;
+	}
 
-	            chips.select('a')
-	                .on('click', removeMultikey)
-	                .attr('class', 'remove')
-	                .text('×');
+	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');
+	  }
 
-	        } else {
-	            var isMixed = Array.isArray(tags[field.key]);
+	  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 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);
-	        }
-	    };
+	  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 registerDragAndDrop(selection) {
+	  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
 
-	        // 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;
-	                }
+	      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..
 
-	                select(this)
-	                    .classed('dragging', false);
+	    touchLayer.call(drawTargets, graph, points, filter);
+	  }
 
-	                container.selectAll('.chip')
-	                    .style('transform', null);
+	  return drawPoints;
+	}
 
-	                if (typeof targetIndex === 'number') {
-	                    var element = _multiData[index];
-	                    _multiData.splice(index, 1);
-	                    _multiData.splice(targetIndex, 0, element);
+	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;
+	  }
 
-	                    var t = {};
+	  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
 
-	                    if (_multiData.length) {
-	                        t[field.key] = _multiData.map(function(element) {
-	                            return element.key;
-	                        }).join(';');
-	                    } else {
-	                        t[field.key] = undefined;
-	                    }
+	      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
 
-	                    dispatch$1.call('change', this, t);
-	                }
-	                dragOrigin = undefined;
-	                targetIndex = undefined;
-	            })
-	        );
+	      return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
 	    }
 
+	    var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
+	    var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..
 
-	    combo.focus = function() {
-	        input.node().focus();
-	    };
+	    var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
+	      return d.key;
+	    }); // exit
 
+	    groups.exit().remove(); // enter
 
-	    combo.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return combo;
-	    };
+	    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
 
+	    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
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	    }
+	    groups.select('circle'); // propagate bound data
+	    // Draw touch targets..
 
+	    var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+	    groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
+	      return d.key;
+	    }); // exit
 
-	    return utilRebind(combo, dispatch$1, 'on');
-	}
+	    groups.exit().remove(); // enter
 
-	function uiFieldText(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var input = select(null);
-	    var outlinkButton = select(null);
-	    var _entityIDs = [];
-	    var _tags;
-	    var _phoneFormats = {};
+	    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
 
-	    if (field.type === 'tel') {
-	        _mainFileFetcher.get('phone_formats')
-	            .then(function(d) {
-	                _phoneFormats = d;
-	                updatePhonePlaceholder();
-	            })
-	            .catch(function() { /* ignore */ });
-	    }
+	    groups = groups.merge(groupsEnter).attr('transform', turnTransform);
+	    groups.select('rect'); // propagate bound data
 
-	    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);
+	    groups.select('circle'); // propagate bound data
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    return this;
+	  }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  return drawTurns;
+	}
 
-	        input = wrap.selectAll('input')
-	            .data([0]);
+	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]
+	  };
 
-	        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);
+	  var _currHoverTarget;
 
-	        input
-	            .classed('disabled', !!isLocked)
-	            .attr('readonly', isLocked || null)
-	            .on('input', change(true))
-	            .on('blur', change())
-	            .on('change', change());
+	  var _currPersistent = {};
+	  var _currHover = {};
+	  var _prevHover = {};
+	  var _currSelected = {};
+	  var _prevSelected = {};
+	  var _radii = {};
 
+	  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.
 
-	        if (field.type === 'tel') {
-	            updatePhonePlaceholder();
 
-	        } else if (field.type === 'number') {
-	            var rtl = (_mainLocalizer.textDirection() === 'rtl');
+	  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;
+	          }
 
-	            input.attr('type', 'text');
+	          if (klass === 'shadow') {
+	            // remember this value, so we don't need to
+	            _radii[entity.id] = r; // recompute it when we draw the touch targets
+	          }
 
-	            var buttons = wrap.selectAll('.increment, .decrement')
-	                .data(rtl ? [1, -1] : [-1, 1]);
+	          select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
+	        });
+	      });
+	    }
 
-	            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) {
+	    vertices.sort(sortY);
+	    var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit
 
-	            input.attr('type', 'text');
+	    groups.exit().remove(); // enter
 
-	            outlinkButton = wrap.selectAll('.foreign-id-permalink')
-	                .data([0]);
+	    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.
 
-	            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();
+	    enter.filter(function (d) {
+	      return d.hasInterestingTags();
+	    }).append('circle').attr('class', 'fill'); // update
 
-	                    var value = validIdentifierValueForLink();
-	                    if (value) {
-	                        var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
-	                        window.open(url, '_blank');
-	                    }
-	                })
-	                .merge(outlinkButton);
-	        }
-	    }
+	    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
 
-	    function updatePhonePlaceholder() {
-	        if (input.empty() || !Object.keys(_phoneFormats).length) { return; }
+	    iconUse.exit().remove(); // enter
 
-	        var extent = combinedEntityExtent();
-	        var countryCode = extent && iso1A2Code(extent.center());
-	        var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
-	        if (format) { input.attr('placeholder', format); }
-	    }
+	    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
 
-	    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;
-	    }
+	    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
 
-	    // 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;
-	    }
+	    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 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);
-	        };
-	    }
+	  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);
 
-	    i.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return i;
-	    };
+	      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
 
-	    i.tags = function(tags) {
-	        _tags = tags;
+	    targets.exit().remove(); // enter/update
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	    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
 
-	        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);
+	    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
 
-	        if (outlinkButton && !outlinkButton.empty()) {
-	            var disabled = !validIdentifierValueForLink();
-	            outlinkButton.classed('disabled', disabled);
-	        }
-	    };
+	    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
 
-	    i.focus = function() {
-	        var node = input.node();
-	        if (node) { node.focus(); }
-	    };
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-	    }
+	  function renderAsVertex(entity, graph, wireframe, zoom) {
+	    var geometry = entity.geometry(graph);
+	    return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
+	  }
 
-	    return utilRebind(i, dispatch$1, 'on');
-	}
+	  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 uiFieldAccess(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var items = select(null);
-	    var _tags;
+	  function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
+	    var results = {};
+	    var seenIds = {};
 
-	    function access(selection) {
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    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);
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	      if (!context.features().isHiddenFeature(entity, graph, geometry)) {
+	        var i;
 
-	        var list = wrap.selectAll('ul')
-	            .data([0]);
+	        if (entity.type === 'way') {
+	          for (i = 0; i < entity.nodes.length; i++) {
+	            var child = graph.hasEntity(entity.nodes[i]);
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(list);
+	            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;
+	        }
+	      }
+	    }
 
-	        items = list.selectAll('li')
-	            .data(field.keys);
+	    ids.forEach(function (id) {
+	      var entity = graph.hasEntity(id);
+	      if (!entity) return;
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'labeled-input preset-access-' + d; });
+	      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;
+	  }
 
-	        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 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:
 
-	        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))
-	                    );
-	            });
 
+	    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)
 
-	        // Update
-	        items = items.merge(enter);
+	    };
+	    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.
 
-	        wrap.selectAll('.preset-input-access')
-	            .on('change', change)
-	            .on('blur', change);
-	    }
+	    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)
 
-	    function change(d) {
-	        var tag = {};
-	        var value = context.cleanTagValue(utilGetSetValue(select(this)));
+	    var filterTouch = function filterTouch(d) {
+	      return isMoving ? true : filterRendered(d);
+	    };
 
-	        // don't override multiple values with blank string
-	        if (!value && typeof _tags[d] !== 'string') { return; }
+	    touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);
 
-	        tag[d] = value || undefined;
-	        dispatch$1.call('change', this, tag);
+	    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..
 
 
-	    access.options = function(type) {
-	        var options = ['no', 'permissive', 'private', 'permit', 'destination'];
+	  drawVertices.drawSelected = function (selection, graph, extent) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    _prevSelected = _currSelected || {};
 
-	        if (type !== 'access') {
-	            options.unshift('yes');
-	            options.push('designated');
+	    if (context.map().isInWideSelection()) {
+	      _currSelected = {};
+	      context.selectedIDs().forEach(function (id) {
+	        var entity = graph.hasEntity(id);
+	        if (!entity) return;
 
-	            if (type === 'bicycle') {
-	                options.push('dismount');
-	            }
+	        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..
 
-	        return options.map(function(option) {
-	            return {
-	                title: field.t('options.' + option + '.description'),
-	                value: option
-	            };
-	        });
+
+	    var filter = function filter(d) {
+	      return d.id in _prevSelected;
 	    };
 
+	    drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
+	  }; // partial redraw - only update the hovered items..
 
-	    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'
-	        }
-	    };
 
+	  drawVertices.drawHover = function (selection, graph, target, extent) {
+	    if (target === _currHoverTarget) return; // continue only if something changed
 
-	    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]) {
+	    var wireframe = context.surface().classed('fill-wireframe');
+	    var zoom = geoScaleToZoom(projection.scale());
+	    _prevHover = _currHover || {};
+	    _currHoverTarget = target;
+	    var entity = target && target.properties && target.properties.entity;
 
-	                            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();
-	            });
-	    };
+	    if (entity) {
+	      _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
+	    } else {
+	      _currHover = {};
+	    } // note that drawVertices will add `_currHover` automatically if needed..
 
 
-	    access.focus = function() {
-	        items.selectAll('.preset-input-access')
-	            .node().focus();
+	    var filter = function filter(d) {
+	      return d.id in _prevHover;
 	    };
 
+	    drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
+	  };
 
-	    return utilRebind(access, dispatch$1, 'on');
+	  return drawVertices;
 	}
 
-	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']
-	        ]
-	      }];
+	function utilBindOnce(target, type, listener, capture) {
+	  var typeOnce = type + '.once';
 
-	    _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;
-	            });
+	  function one() {
+	    target.on(typeOnce, null);
+	    listener.apply(this, arguments);
+	  }
 
-	        return utilArrayUniqBy(streets, 'value');
+	  target.on(typeOnce, one, capture);
+	  return this;
+	}
 
-	        function isAddressable(d) {
-	            return d.tags.highway && d.tags.name && d.type === 'way';
-	        }
-	    }
+	function defaultFilter$2(d3_event) {
+	  return !d3_event.ctrlKey && !d3_event.button;
+	}
 
+	function defaultExtent$1() {
+	  var e = this;
 
-	    function getNearCities() {
-	        var extent = combinedEntityExtent();
-	        var l = extent.center();
-	        var box = geoExtent(l).padByMeters(200);
+	  if (e instanceof SVGElement) {
+	    e = e.ownerSVGElement || e;
 
-	        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;
-	            });
+	    if (e.hasAttribute('viewBox')) {
+	      e = e.viewBox.baseVal;
+	      return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+	    }
 
-	        return utilArrayUniqBy(cities, 'value');
+	    return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+	  }
 
+	  return [[0, 0], [e.clientWidth, e.clientHeight]];
+	}
 
-	        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 defaultWheelDelta$1(d3_event) {
+	  return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
+	}
 
-	            if (d.tags['addr:city'])
-	                { return true; }
+	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));
+	}
 
-	            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,
+	      dispatch$1 = dispatch('start', 'zoom', 'end'),
+	      _wheelDelay = 150,
+	      _transform = identity$2,
+	      _activeGesture;
 
-	    function getNearValues(key) {
-	        var extent = combinedEntityExtent();
-	        var l = extent.center();
-	        var box = geoExtent(l).padByMeters(200);
+	  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);
+	  }
 
-	        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;
-	            });
+	  zoom.transform = function (collection, transform, point) {
+	    var selection = collection.selection ? collection.selection() : collection;
 
-	        return utilArrayUniqBy(results, 'value');
+	    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 updateForCountryCode() {
-
-	        if (!_countryCode) { return; }
+	  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);
+	  };
 
-	        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;
-	            }
-	        }
+	  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 dropdowns = addressFormat.dropdowns || [
-	            'city', 'county', 'country', 'district', 'hamlet',
-	            'neighbourhood', 'place', 'postcode', 'province',
-	            'quarter', 'state', 'street', 'subdistrict', 'suburb'
-	        ];
+	  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);
+	  };
 
-	        var widths = addressFormat.widths || {
-	            housenumber: 1/3, street: 2/3,
-	            city: 2/3, state: 1/4, postcode: 1/3
-	        };
+	  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 row(r) {
-	            // Normalize widths.
-	            var total = r.reduce(function(sum, key) {
-	                return sum + (widths[key] || 0.5);
-	            }, 0);
+	  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 r.map(function(key) {
-	                return {
-	                    id: key,
-	                    width: (widths[key] || 0.5) / total
-	                };
-	            });
-	        }
+	  function centroid(extent) {
+	    return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+	  }
 
-	        var rows = _wrap.selectAll('.addr-row')
-	            .data(addressFormat.format, function(d) {
-	                return d.toString();
-	            });
+	  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);
+	      };
+	    });
+	  }
 
-	        rows.exit()
-	            .remove();
+	  function gesture(that, args, clean) {
+	    return !clean && _activeGesture || new Gesture(that, args);
+	  }
 
-	        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 Gesture(that, args) {
+	    this.that = that;
+	    this.args = args;
+	    this.active = 0;
+	    this.extent = extent.apply(that, args);
+	  }
 
-	        _wrap.selectAll('input')
-	            .on('blur', change())
-	            .on('change', change());
+	  Gesture.prototype = {
+	    start: function start(d3_event) {
+	      if (++this.active === 1) {
+	        _activeGesture = this;
+	        dispatch$1.call('start', this, d3_event);
+	      }
 
-	        _wrap.selectAll('input:not(.combobox-input)')
-	            .on('input', change(true));
+	      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);
+	      }
 
-	        if (_tags) { updateTags(_tags); }
+	      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 address(selection) {
-	        _selection = selection;
-
-	        _wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	    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);
+	      }
 
-	        _wrap = _wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(_wrap);
+	      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);
+	    }
 
-	        var extent = combinedEntityExtent();
+	    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));
 
-	        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();
-	            }
-	        }
+	    function wheelidled() {
+	      g.wheel = null;
+	      g.end(d3_event);
 	    }
+	  }
 
+	  var _downPointerIDs = new Set();
 
-	    function change(onInput) {
-	        return function() {
-	            var tags = {};
+	  var _pointerLocGetter;
 
-	            _wrap.selectAll('input')
-	                .each(function (subfield) {
-	                    var key = field.key + ':' + subfield.id;
+	  function pointerdown(d3_event) {
+	    _downPointerIDs.add(d3_event.pointerId);
 
-	                    var value = this.value;
-	                    if (!onInput) { value = context.cleanTagValue(value); }
+	    if (!filter.apply(this, arguments)) return;
+	    var g = gesture(this, arguments, _downPointerIDs.size === 1);
+	    var started;
+	    d3_event.stopImmediatePropagation();
+	    _pointerLocGetter = utilFastMouse(this);
 
-	                    // don't override multiple values with blank string
-	                    if (Array.isArray(_tags[key]) && !value) { return; }
+	    var loc = _pointerLocGetter(d3_event);
 
-	                    tags[key] = value || undefined;
-	                });
+	    var p = [loc, _transform.invert(loc), d3_event.pointerId];
 
-	            dispatch$1.call('change', this, tags, onInput);
-	        };
+	    if (!g.pointer0) {
+	      g.pointer0 = p;
+	      started = true;
+	    } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
+	      g.pointer1 = p;
 	    }
 
-	    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);
-	            }
-	        });
+	    if (started) {
+	      interrupt(this);
+	      g.start(d3_event);
 	    }
+	  }
 
+	  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;
 
-	    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 ((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;
 	    }
 
+	    d3_event.preventDefault();
+	    d3_event.stopImmediatePropagation();
+
+	    var loc = _pointerLocGetter(d3_event);
+
+	    var t, p, l;
+	    if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
+	    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];
+	    } else return;
+
+	    g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
+	  }
+
+	  function pointerup(d3_event) {
+	    if (!_downPointerIDs.has(d3_event.pointerId)) return;
+
+	    _downPointerIDs["delete"](d3_event.pointerId);
+
+	    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;
+
+	    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);
 	    }
+	  }
 
+	  zoom.wheelDelta = function (_) {
+	    return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
+	  };
 
-	    address.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return address;
-	    };
+	  zoom.filter = function (_) {
+	    return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
+	  };
 
+	  zoom.extent = function (_) {
+	    return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+	  };
 
-	    address.tags = function(tags) {
-	        _tags = tags;
-	        updateTags(tags);
-	    };
+	  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]]];
+	  };
 
-	    address.focus = function() {
-	        var node = _wrap.selectAll('input').node();
-	        if (node) { node.focus(); }
-	    };
+	  zoom.constrain = function (_) {
+	    return arguments.length ? (constrain = _, zoom) : constrain;
+	  };
 
+	  zoom.interpolate = function (_) {
+	    return arguments.length ? (interpolate = _, zoom) : interpolate;
+	  };
 
-	    return utilRebind(address, dispatch$1, 'on');
-	}
+	  zoom._transform = function (_) {
+	    return arguments.length ? (_transform = _, zoom) : _transform;
+	  };
 
-	function uiFieldCycleway(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var items = select(null);
-	    var wrap = select(null);
-	    var _tags;
+	  return utilRebind(zoom, dispatch$1, 'on');
+	}
 
-	    function cycleway(selection) {
+	// if pointer events are supported. Falls back to default `dblclick` event.
 
-	        function stripcolon(s) {
-	            return s.replace(':', '');
-	        }
+	function utilDoubleUp() {
+	  var dispatch$1 = dispatch('doubleUp');
+	  var _maxTimespan = 500; // milliseconds
 
+	  var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
 
-	        wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  var _pointer; // object representing the pointer that could trigger double up
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
 
+	  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;
+	  }
 
-	        var div = wrap.selectAll('ul')
-	            .data([0]);
+	  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
 
-	        div = div.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(div);
+	    if (_pointer && !pointerIsValidFor(loc)) {
+	      // if this pointer is no longer valid, clear it so another can be started
+	      _pointer = undefined;
+	    }
 
-	        var keys = ['cycleway:left', 'cycleway:right'];
+	    if (!_pointer) {
+	      _pointer = {
+	        startLoc: loc,
+	        startTime: new Date().getTime(),
+	        upCount: 0,
+	        pointerId: d3_event.pointerId
+	      };
+	    } else {
+	      // double down
+	      _pointer.pointerId = d3_event.pointerId;
+	    }
+	  }
 
-	        items = div.selectAll('li')
-	            .data(keys);
+	  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;
 
-	        var enter = items.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'labeled-input preset-cycleway-' + stripcolon(d); });
+	    if (_pointer.upCount === 2) {
+	      // double up!
+	      var loc = [d3_event.clientX, d3_event.clientY];
 
-	        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 (pointerIsValidFor(loc)) {
+	        var locInThis = utilFastMouse(this)(d3_event);
+	        dispatch$1.call('doubleUp', this, d3_event, locInThis);
+	      } // clear the pointer info in any case
 
-	        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);
+	      _pointer = undefined;
+	    }
+	  }
 
-	        // Update
-	        wrap.selectAll('.preset-input-cycleway')
-	            .on('change', change)
-	            .on('blur', change);
+	  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));
+	      });
 	    }
+	  }
 
+	  doubleUp.off = function (selection) {
+	    selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
+	  };
 
-	    function change(key) {
+	  return utilRebind(doubleUp, dispatch$1, 'on');
+	}
 
-	        var newValue = context.cleanTagValue(utilGetSetValue(select(this)));
+	var TILESIZE = 256;
+	var minZoom = 2;
+	var maxZoom = 24;
+	var kMin = geoZoomToScale(minZoom, TILESIZE);
+	var kMax = geoZoomToScale(maxZoom, TILESIZE);
 
-	        // don't override multiple values with blank string
-	        if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) { return; }
+	function clamp(num, min, max) {
+	  return Math.max(min, Math.min(num, max));
+	}
 
-	        if (newValue === 'none' || newValue === '') { newValue = undefined; }
+	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 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; }
+	  var _selection = select(null);
 
-	        var tag = {};
+	  var supersurface = select(null);
+	  var wrapper = select(null);
+	  var surface = select(null);
+	  var _dimensions = [1, 1];
+	  var _dblClickZoomEnabled = true;
+	  var _redrawEnabled = true;
 
-	        // 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;
-	        }
+	  var _gestureTransformStart;
 
-	        dispatch$1.call('change', this, tag);
-	    }
+	  var _transformStart = projection.transform();
 
+	  var _transformLast;
 
-	    cycleway.options = function() {
-	        return Object.keys(field.strings.options).map(function(option) {
-	            return {
-	                title: field.t('options.' + option + '.description'),
-	                value: option
-	            };
-	        });
-	    };
+	  var _isTransformed = false;
+	  var _minzoom = 0;
 
+	  var _getMouseCoords;
 
-	    cycleway.tags = function(tags) {
-	        _tags = tags;
+	  var _lastPointerEvent;
 
-	        // If cycleway is set, use that instead of individual values
-	        var commonValue = typeof tags.cycleway === 'string' && tags.cycleway;
+	  var _lastWithinEditableZoom; // whether a pointerdown event started the zoom
 
-	        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 _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events
 
-	    cycleway.focus = function() {
-	        var node = wrap.selectAll('input').node();
-	        if (node) { node.focus(); }
-	    };
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
 
 
-	    return utilRebind(cycleway, dispatch$1, 'on');
-	}
+	  var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
 
-	function uiFieldLanes(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var LANE_WIDTH = 40;
-	    var LANE_HEIGHT = 200;
-	    var _entityIDs = [];
+	  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 lanes(selection) {
-	        var lanesData = context.entity(_entityIDs[0]).lanes();
+	  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 });
+	  // }
 
-	        if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
-	            selection.call(lanes.off);
-	            return;
-	        }
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  function cancelPendingRedraw() {
+	    scheduleRedraw.cancel(); // isRedrawScheduled = false;
+	    // window.cancelIdleCallback(pendingRedrawCall);
+	  }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  function map(selection) {
+	    _selection = selection;
+	    context.on('change.map', immediateRedraw);
+	    var osm = context.connection();
 
-	        var surface =  wrap.selectAll('.surface')
-	            .data([0]);
+	    if (osm) {
+	      osm.on('change.map', immediateRedraw);
+	    }
 
-	        var d = utilGetDimensions(wrap);
-	        var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
+	    function didUndoOrRedo(targetTransform) {
+	      var mode = context.mode().id;
+	      if (mode !== 'browse' && mode !== 'select') return;
 
-	        surface = surface.enter()
-	            .append('svg')
-	            .attr('width', d[0])
-	            .attr('height', 300)
-	            .attr('class', 'surface')
-	            .merge(surface);
+	      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
 
-	        var lanesSelection = surface.selectAll('.lanes')
-	            .data([0]);
+	    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
 
-	        lanesSelection = lanesSelection.enter()
-	            .append('g')
-	            .attr('class', 'lanes')
-	            .merge(lanesSelection);
+	    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;
 
-	        lanesSelection
-	            .attr('transform', function () {
-	                return 'translate(' + (freeSpace / 2) + ', 0)';
-	            });
+	      if (d3_event.button === 2) {
+	        d3_event.stopPropagation();
+	      }
+	    }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
+	      _lastPointerEvent = d3_event;
 
+	      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);
+	    });
 
-	        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)';
-	            });
+	    context.on('enter.map', function () {
+	      if (!map.editableDataEnabled(true
+	      /* skip zoom check */
+	      )) return; // redraw immediately any objects affected by a change in selectedIDs.
 
-	        lane.select('.forward')
-	            .style('visibility', function(d) {
-	                return d.direction === 'forward' ? 'visible' : 'hidden';
-	            });
+	      var graph = context.graph();
+	      var selectedAndParents = {};
+	      context.selectedIDs().forEach(function (id) {
+	        var entity = graph.hasEntity(id);
 
-	        lane.select('.bothways')
-	            .style('visibility', function(d) {
-	                return d.direction === 'bothways' ? 'visible' : 'hidden';
-	            });
+	        if (entity) {
+	          selectedAndParents[entity.id] = entity;
 
-	        lane.select('.backward')
-	            .style('visibility', function(d) {
-	                return d.direction === 'backward' ? 'visible' : 'hidden';
+	          if (entity.type === 'node') {
+	            graph.parentWays(entity).forEach(function (parent) {
+	              selectedAndParents[parent.id] = parent;
 	            });
-	    }
-
+	          }
+	        }
+	      });
+	      var data = Object.values(selectedAndParents);
 
-	    lanes.entityIDs = function(val) {
-	        _entityIDs = val;
-	    };
+	      var filter = function filter(d) {
+	        return d.id in selectedAndParents;
+	      };
 
-	    lanes.tags = function() {};
-	    lanes.focus = function() {};
-	    lanes.off = function() {};
+	      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
 
-	    return utilRebind(lanes, dispatch$1, 'on');
-	}
+	      scheduleRedraw();
+	    });
+	    map.dimensions(utilGetDimensions(selection));
+	  }
 
-	uiFieldLanes.supportsMultiselection = false;
+	  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;
 
-	var _languagesArray = [];
+	      for (var i = 0; i < listeners.length; i++) {
+	        var listener = listeners[i];
 
+	        if (listener.name === 'zoom' && listener.type === 'mouseup') {
+	          hasOrphan = true;
+	          break;
+	        }
+	      }
 
-	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;
+	      if (hasOrphan) {
+	        var event = window.CustomEvent;
 
+	        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.
 
-	    // 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 */ });
 
-	    var _territoryLanguages = {};
-	    _mainFileFetcher.get('territory_languages')
-	        .then(function(d) { _territoryLanguages = d; })
-	        .catch(function() { /* ignore */ });
+	        event.view = window;
+	        window.dispatchEvent(event);
+	      }
+	    }
 
+	    return d3_event.button !== 2; // ignore right clicks
+	  }
 
-	    var allSuggestions = _mainPresetIndex.collection.filter(function(p) {
-	        return p.suggestion === true;
-	    });
+	  function pxCenter() {
+	    return [_dimensions[0] / 2, _dimensions[1] / 2];
+	  }
 
-	    // reuse these combos
-	    var langCombo = uiCombobox(context, 'localized-lang')
-	        .fetcher(fetchLanguages)
-	        .minItems(0);
+	  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
 
-	    var brandCombo = uiCombobox(context, 'localized-brand')
-	        .canAutocomplete(false)
-	        .minItems(1);
+	      applyFeatureLayerFilters = false;
+	    } else if (difference) {
+	      var complete = difference.complete(map.extent());
+	      data = Object.values(complete).filter(Boolean);
+	      set = new Set(Object.keys(complete));
 
-	    var _selection = select(null);
-	    var _multilingual = [];
-	    var _buttonTip = uiTooltip()
-	        .title(_t('translate.translate'))
-	        .placement('left');
-	    var _wikiTitles;
-	    var _entityIDs = [];
+	      filter = function filter(d) {
+	        return set.has(d.id);
+	      };
 
+	      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;
+	      }
 
-	    function loadLanguagesArray(dataLanguages) {
-	        if (_languagesArray.length !== 0) { return; }
+	      if (extent) {
+	        data = context.history().intersects(map.extent().intersection(extent));
+	        set = new Set(data.map(function (entity) {
+	          return entity.id;
+	        }));
 
-	        // 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
+	        filter = function filter(d) {
+	          return set.has(d.id);
 	        };
+	      } else {
+	        data = all;
+	        fullRedraw = true;
+	        filter = utilFunctor(true);
+	      }
+	    }
 
-	        for (var code in dataLanguages) {
-	            if (replacements[code] === false) { continue; }
-	            var metaCode = code;
-	            if (replacements[code]) { metaCode = replacements[code]; }
+	    if (applyFeatureLayerFilters) {
+	      data = features.filter(data, graph);
+	    } else {
+	      context.features().resetStats();
+	    }
 
-	            _languagesArray.push({
-	                localName: _mainLocalizer.languageName(metaCode, { localOnly: true }),
-	                nativeName: dataLanguages[metaCode].nativeName,
-	                code: code,
-	                label: _mainLocalizer.languageName(metaCode)
-	            });
-	        }
+	    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());
 	    }
 
+	    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
+	    });
+	  }
+
+	  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);
+	  };
 
-	    function calcLocked() {
+	  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();
 
-	        // only lock the Name field
-	        var isLocked = field.id === 'name' &&
-	            _entityIDs.length &&
-	            // lock the field if any feature needs it
-	            _entityIDs.some(function(entityID) {
+	    if (mode && !allowed[mode.id]) {
+	      context.enter(modeBrowse(context));
+	    }
 
-	                var entity = context.graph().hasEntity(entityID);
-	                if (!entity) { return false; }
+	    dispatch$1.call('drawn', this, {
+	      full: true
+	    });
+	  }
 
-	                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 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;
+	        }
+	      }
+	    }
 
-	                // features linked to Wikidata are likely important and should be protected
-	                if (entity.tags.wikidata) { return true; }
+	    if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
+	      return; // no change
+	    }
 
-	                // assume the name has already been confirmed if its source has been researched
-	                if (entity.tags['name:etymology:wikidata']) { return true; }
+	    var withinEditableZoom = map.withinEditableZoom();
 
-	                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;
-	            });
+	    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);
+	      }
 
-	        field.locked(isLocked);
+	      _lastWithinEditableZoom = withinEditableZoom;
 	    }
 
+	    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;
+	    }
 
-	    // 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));
+	    projection.transform(eventTransform);
+	    var scale = k / _transformStart.k;
+	    var tX = (x / scale - _transformStart.x) * scale;
+	    var tY = (y / scale - _transformStart.y) * scale;
 
-	        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 (context.inIntro()) {
+	      curtainProjection.transform({
+	        x: x - tX,
+	        y: y - tY,
+	        k: k
+	      });
+	    }
 
-	        _multilingual = _multilingual.filter(function(item) {
-	            return !item.lang || !existingLangs.has(item.lang);
-	        });
+	    if (source) {
+	      _lastPointerEvent = event;
 	    }
 
+	    _isTransformed = true;
+	    _transformLast = eventTransform;
+	    utilSetTransform(supersurface, tX, tY, scale);
+	    scheduleRedraw();
+	    dispatch$1.call('move', this, map);
 
-	    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());
+	    function isInteger(val) {
+	      return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
+	    }
+	  }
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  function resetTransform() {
+	    if (!_isTransformed) return false;
+	    utilSetTransform(supersurface, 0, 0);
+	    _isTransformed = false;
 
-	        // 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);
-	                });
+	    if (context.inIntro()) {
+	      curtainProjection.transform(projection.transform());
+	    }
 
-	                // 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 true;
+	  }
+
+	  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.
 
-	        input
-	            .classed('disabled', !!isLocked)
-	            .attr('readonly', isLocked || null)
-	            .on('input', change(true))
-	            .on('blur', change())
-	            .on('change', change());
+	    if (resetTransform()) {
+	      difference = extent = undefined;
+	    }
 
+	    var zoom = map.zoom();
+	    var z = String(~~zoom);
 
-	        var translateButton = wrap.selectAll('.localized-add')
-	            .data([0]);
+	    if (surface.attr('data-zoom') !== z) {
+	      surface.attr('data-zoom', z);
+	    } // class surface as `lowzoom` around z17-z18.5 (based on latitude)
 
-	        translateButton = translateButton.enter()
-	            .append('button')
-	            .attr('class', 'localized-add form-field-button')
-	            .attr('tabindex', -1)
-	            .call(svgIcon('#iD-icon-plus'))
-	            .merge(translateButton);
 
-	        translateButton
-	            .classed('disabled', !!isLocked)
-	            .call(isLocked ? _buttonTip.destroy : _buttonTip)
-	            .on('click', addNew);
+	    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 (!difference) {
+	      supersurface.call(context.background());
+	      wrapper.call(drawLayers);
+	    } // OSM
 
-	        if (_tags && !_multilingual.length) {
-	            calcMultilingual(_tags);
-	        }
 
-	        localizedInputs = selection.selectAll('.localized-multilingual')
-	            .data([0]);
+	    if (map.editableDataEnabled() || map.isInWideSelection()) {
+	      context.loadTiles(projection);
+	      drawEditable(difference, extent);
+	    } else {
+	      editOff();
+	    }
 
-	        localizedInputs = localizedInputs.enter()
-	            .append('div')
-	            .attr('class', 'localized-multilingual')
-	            .merge(localizedInputs);
+	    _transformStart = projection.transform();
+	    return map;
+	  }
 
-	        localizedInputs
-	            .call(renderMultilingual);
+	  var immediateRedraw = function immediateRedraw(difference, extent) {
+	    if (!difference && !extent) cancelPendingRedraw();
+	    redraw(difference, extent);
+	  };
 
-	        localizedInputs.selectAll('button, input')
-	            .classed('disabled', !!isLocked)
-	            .attr('readonly', isLocked || null);
+	  map.lastPointerEvent = function () {
+	    return _lastPointerEvent;
+	  };
 
+	  map.mouse = function (d3_event) {
+	    var event = _lastPointerEvent || d3_event;
 
+	    if (event) {
+	      var s;
 
-	        // 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?
+	      while (s = event.sourceEvent) {
+	        event = s;
+	      }
 
-	            var preset = _mainPresetIndex.match(latest, context.graph());
-	            if (preset && preset.suggestion) { return; }   // already accepted
+	      return _getMouseCoords(event);
+	    }
 
-	            // 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(); });
+	    return null;
+	  }; // returns Lng/Lat
 
-	            if (matched.length === 1) {
-	                acceptBrand({ suggestion: matched[0] });
-	            } else {
-	                cancelBrand();
-	            }
-	        }
 
+	  map.mouseCoordinates = function () {
+	    var coord = map.mouse() || pxCenter();
+	    return projection.invert(coord);
+	  };
 
-	        function acceptBrand(d) {
+	  map.dblclickZoomEnable = function (val) {
+	    if (!arguments.length) return _dblClickZoomEnabled;
+	    _dblClickZoomEnabled = val;
+	    return map;
+	  };
 
-	            var entity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+	  map.redrawEnable = function (val) {
+	    if (!arguments.length) return _redrawEnabled;
+	    _redrawEnabled = val;
+	    return map;
+	  };
 
-	            if (!d || !entity) {
-	                cancelBrand();
-	                return;
-	            }
+	  map.isTransformed = function () {
+	    return _isTransformed;
+	  };
 
-	            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);
-	        }
+	  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;
 
+	    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;
 
-	        // 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 });
-	            }
-	        }
+	      _selection.call(_zoomerPanner.transform, _transformStart);
+	    }
 
-	        // 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);
-	            };
-	        }
+	    return 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;
+	    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();
 
-	        function addNew() {
-	            event.preventDefault();
-	            if (field.locked()) { return; }
+	      _selection.call(_zoomerPanner.transform, _transformStart);
 
-	            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; });
-	            }
+	      dispatch$1.call('move', this, map);
+	      immediateRedraw();
+	    }
 
-	            if (!langExists) {
-	                // prepend the value so it appears at the top
-	                _multilingual.unshift({ lang: defaultLang, value: '' });
+	    return map;
+	  };
 
-	                localizedInputs
-	                    .call(renderMultilingual);
-	            }
-	        }
+	  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 zoomIn(delta) {
+	    setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
+	  }
 
-	        function change(onInput) {
-	            return function() {
-	                if (field.locked()) {
-	                    event.preventDefault();
-	                    return;
-	                }
+	  function zoomOut(delta) {
+	    setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
+	  }
 
-	                var val = utilGetSetValue(select(this));
-	                if (!onInput) { val = context.cleanTagValue(val); }
+	  map.zoomIn = function () {
+	    zoomIn(1);
+	  };
 
-	                // don't override multiple values with blank string
-	                if (!val && Array.isArray(_tags[field.key])) { return; }
+	  map.zoomInFurther = function () {
+	    zoomIn(4);
+	  };
 
-	                var t = {};
+	  map.canZoomIn = function () {
+	    return map.zoom() < maxZoom;
+	  };
 
-	                t[field.key] = val || undefined;
-	                dispatch$1.call('change', this, t, onInput);
-	            };
-	        }
-	    }
+	  map.zoomOut = function () {
+	    zoomOut(1);
+	  };
+
+	  map.zoomOutFurther = function () {
+	    zoomOut(4);
+	  };
 
+	  map.canZoomOut = function () {
+	    return map.zoom() > minZoom;
+	  };
 
-	    function key(lang) {
-	        return field.key + ':' + lang;
+	  map.center = function (loc2) {
+	    if (!arguments.length) {
+	      return projection.invert(pxCenter());
 	    }
 
+	    if (setCenterZoom(loc2, map.zoom())) {
+	      dispatch$1.call('move', this, map);
+	    }
 
-	    function changeLang(d) {
-	        var tags = {};
-
-	        // make sure unrecognized suffixes are lowercase - #7156
-	        var lang = utilGetSetValue(select(this)).toLowerCase();
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	        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; }
+	  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
 
-	        if (d.lang && d.lang !== lang) {
-	            tags[key(d.lang)] = undefined;
-	        }
+	    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);
+	  };
 
-	        var newKey = lang && context.cleanTagKey(key(lang));
+	  map.unobscuredOffsetPx = function () {
+	    var openPane = context.container().select('.map-panes .map-pane.shown');
 
-	        var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
+	    if (!openPane.empty()) {
+	      return [openPane.node().offsetWidth / 2, 0];
+	    }
 
-	        if (newKey && value) {
-	            tags[newKey] = value;
-	        } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
-	            tags[newKey] = _wikiTitles[d.lang];
-	        }
+	    return [0, 0];
+	  };
 
-	        d.lang = lang;
-	        dispatch$1.call('change', this, tags);
+	  map.zoom = function (z2) {
+	    if (!arguments.length) {
+	      return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
 	    }
 
+	    if (z2 < _minzoom) {
+	      surface.interrupt();
+	      dispatch$1.call('hitMinZoom', this, map);
+	      z2 = context.minEditableZoom();
+	    }
 
-	    function changeValue(d) {
-	        if (!d.lang) { return; }
-	        var value = context.cleanTagValue(utilGetSetValue(select(this))) || undefined;
+	    if (setCenterZoom(map.center(), z2)) {
+	      dispatch$1.call('move', this, map);
+	    }
 
-	        // don't override multiple values with blank string
-	        if (!value && Array.isArray(d.value)) { return; }
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	        var t = {};
-	        t[key(d.lang)] = value;
-	        d.value = value;
-	        dispatch$1.call('change', this, t);
+	  map.centerZoom = function (loc2, z2) {
+	    if (setCenterZoom(loc2, z2)) {
+	      dispatch$1.call('move', this, map);
 	    }
 
+	    scheduleRedraw();
+	    return map;
+	  };
 
-	    function fetchLanguages(value, cb) {
-	        var v = value.toLowerCase();
+	  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);
+	  };
 
-	        // show the user's language first
-	        var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
+	  map.centerEase = function (loc2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(loc2, map.zoom(), duration);
+	    return map;
+	  };
 
-	        if (_countryCode && _territoryLanguages[_countryCode]) {
-	            langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
-	        }
+	  map.zoomEase = function (z2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(map.center(), z2, duration, false);
+	    return map;
+	  };
 
-	        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 };
-	        }));
-	    }
+	  map.centerZoomEase = function (loc2, z2, duration) {
+	    duration = duration || 250;
+	    setCenterZoom(loc2, z2, duration, false);
+	    return map;
+	  };
 
+	  map.transformEase = function (t2, duration) {
+	    duration = duration || 250;
+	    setTransform(t2, duration, false
+	    /* don't force */
+	    );
+	    return map;
+	  };
 
-	    function renderMultilingual(selection) {
-	        var entries = selection.selectAll('div.entry')
-	            .data(_multilingual, function(d) { return d.lang; });
+	  map.zoomToEase = function (obj, duration) {
+	    var extent;
 
-	        entries.exit()
-	            .style('top', '0')
-	            .style('max-height', '240px')
-	            .transition()
-	            .duration(200)
-	            .style('opacity', '0')
-	            .style('max-height', '0px')
-	            .remove();
+	    if (Array.isArray(obj)) {
+	      obj.forEach(function (entity) {
+	        var entityExtent = entity.extent(context.graph());
 
-	        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);
-	            });
+	        if (!extent) {
+	          extent = entityExtent;
+	        } else {
+	          extent = extent.extend(entityExtent);
+	        }
+	      });
+	    } else {
+	      extent = obj.extent(context.graph());
+	    }
 
-	        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');
-	            });
+	    if (!isFinite(extent.area())) return map;
+	    var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
+	    return map.centerZoomEase(extent.center(), z2, duration);
+	  };
 
-	        entries = entries.merge(entriesEnter);
+	  map.startEase = function () {
+	    utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
+	      map.cancelEase();
+	    });
+	    return map;
+	  };
 
-	        entries.order();
+	  map.cancelEase = function () {
+	    _selection.interrupt();
 
-	        entries.classed('present', function(d) {
-	            return d.lang && d.value;
-	        });
+	    return map;
+	  };
 
-	        utilGetSetValue(entries.select('.localized-lang'), function(d) {
-	            return _mainLocalizer.languageName(d.lang);
-	        });
+	  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));
+	    }
+	  };
 
-	        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);
-	            });
+	  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 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
 
-	    localized.tags = function(tags) {
-	        _tags = tags;
+	    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;
+	  }
 
-	        // 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;
-	                });
-	            }
-	        }
+	  map.extentZoom = function (val) {
+	    return calcExtentZoom(geoExtent(val), _dimensions);
+	  };
+
+	  map.trimmedExtentZoom = function (val) {
+	    var trimY = 120;
+	    var trimX = 40;
+	    var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
+	    return calcExtentZoom(geoExtent(val), trimmed);
+	  };
 
-	        var isMixed = Array.isArray(tags[field.key]);
+	  map.withinEditableZoom = function () {
+	    return map.zoom() >= context.minEditableZoom();
+	  };
 
-	        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);
+	  map.isInWideSelection = function () {
+	    return !map.withinEditableZoom() && context.selectedIDs().length;
+	  };
 
-	        calcMultilingual(tags);
+	  map.editableDataEnabled = function (skipZoomCheck) {
+	    var layer = context.layers().layer('osm');
+	    if (!layer || !layer.enabled()) return false;
+	    return skipZoomCheck || map.withinEditableZoom();
+	  };
 
-	        _selection
-	            .call(localized);
-	    };
+	  map.notesEditable = function () {
+	    var layer = context.layers().layer('notes');
+	    if (!layer || !layer.enabled()) return false;
+	    return map.withinEditableZoom();
+	  };
 
+	  map.minzoom = function (val) {
+	    if (!arguments.length) return _minzoom;
+	    _minzoom = val;
+	    return map;
+	  };
 
-	    localized.focus = function() {
-	        input.node().focus();
-	    };
+	  map.toggleHighlightEdited = function () {
+	    surface.classed('highlight-edited', !surface.classed('highlight-edited'));
+	    map.pan([0, 0]); // trigger a redraw
 
+	    dispatch$1.call('changeHighlighting', this);
+	  };
 
-	    localized.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        _multilingual = [];
-	        loadCountryCode();
-	        return localized;
-	    };
+	  map.areaFillOptions = ['wireframe', 'partial', 'full'];
 
-	    function loadCountryCode() {
-	        var extent = combinedEntityExtent();
-	        var countryCode = extent && iso1A2Code(extent.center());
-	        _countryCode = countryCode && countryCode.toLowerCase();
-	    }
+	  map.activeAreaFill = function (val) {
+	    if (!arguments.length) return corePreferences('area-fill') || 'partial';
+	    corePreferences('area-fill', val);
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	    if (val !== 'wireframe') {
+	      corePreferences('area-fill-toggle', val);
 	    }
 
-	    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;
+	    updateAreaFill();
+	    map.pan([0, 0]); // trigger a redraw
 
-	    var speedCombo = uiCombobox(context, 'maxspeed');
-	    var unitCombo = uiCombobox(context, 'maxspeed-unit')
-	            .data(['km/h', 'mph'].map(comboValues));
+	    dispatch$1.call('changeAreaFill', this);
+	    return map;
+	  };
 
-	    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];
+	  map.toggleWireframe = function () {
+	    var activeFill = map.activeAreaFill();
 
+	    if (activeFill === 'wireframe') {
+	      activeFill = corePreferences('area-fill-toggle') || 'partial';
+	    } else {
+	      activeFill = 'wireframe';
+	    }
 
-	    function maxspeed(selection) {
+	    map.activeAreaFill(activeFill);
+	  };
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  function updateAreaFill() {
+	    var activeFill = map.activeAreaFill();
+	    map.areaFillOptions.forEach(function (opt) {
+	      surface.classed('fill-' + opt, Boolean(opt === activeFill));
+	    });
+	  }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	  map.layers = function () {
+	    return drawLayers;
+	  };
 
+	  map.doubleUpHandler = function () {
+	    return _doubleUpHandler;
+	  };
 
-	        input = wrap.selectAll('input.maxspeed-number')
-	            .data([0]);
+	  return utilRebind(map, dispatch$1, 'on');
+	}
 
-	        input = input.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', 'maxspeed-number')
-	            .attr('id', field.domId)
-	            .call(utilNoAuto)
-	            .call(speedCombo)
-	            .merge(input);
+	function rendererPhotos(context) {
+	  var dispatch$1 = dispatch('change');
+	  var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
+	  var _allPhotoTypes = ['flat', 'panoramic'];
 
-	        input
-	            .on('change', change)
-	            .on('blur', change);
+	  var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy
 
-	        var loc = combinedEntityExtent().center();
-	        _isImperial = roadSpeedUnit(loc) === 'mph';
 
-	        unitInput = wrap.selectAll('input.maxspeed-unit')
-	            .data([0]);
+	  var _dateFilters = ['fromDate', 'toDate'];
 
-	        unitInput = unitInput.enter()
-	            .append('input')
-	            .attr('type', 'text')
-	            .attr('class', 'maxspeed-unit')
-	            .call(unitCombo)
-	            .merge(unitInput);
+	  var _fromDate;
 
-	        unitInput
-	            .on('blur', changeUnits)
-	            .on('change', changeUnits);
+	  var _toDate;
 
+	  var _usernames;
 
-	        function changeUnits() {
-	            _isImperial = utilGetSetValue(unitInput) === 'mph';
-	            utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-	            setUnitSuggestions();
-	            change();
-	        }
-	    }
+	  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;
+	    });
 
-	    function setUnitSuggestions() {
-	        speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
-	        utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+	    if (enabled.length) {
+	      hash.photo_overlay = enabled.join(',');
+	    } else {
+	      delete hash.photo_overlay;
 	    }
 
+	    window.location.replace('#' + utilQsString(hash, true));
+	  }
 
-	    function comboValues(d) {
-	        return {
-	            value: d.toString(),
-	            title: d.toString()
-	        };
-	    }
+	  photos.overlayLayerIDs = function () {
+	    return _layerIDs;
+	  };
 
+	  photos.allPhotoTypes = function () {
+	    return _allPhotoTypes;
+	  };
 
-	    function change() {
-	        var tag = {};
-	        var value = utilGetSetValue(input).trim();
+	  photos.dateFilters = function () {
+	    return _dateFilters;
+	  };
 
-	        // don't override multiple values with blank string
-	        if (!value && Array.isArray(_tags[field.key])) { return; }
+	  photos.dateFilterValue = function (val) {
+	    return val === _dateFilters[0] ? _fromDate : _toDate;
+	  };
 
-	        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');
-	        }
+	  photos.setDateFilter = function (type, val, updateUrl) {
+	    // validate the date
+	    var date = val && new Date(val);
 
-	        dispatch$1.call('change', this, tag);
+	    if (date && !isNaN(date)) {
+	      val = date.toISOString().substr(0, 10);
+	    } else {
+	      val = null;
 	    }
 
+	    if (type === _dateFilters[0]) {
+	      _fromDate = val;
 
-	    maxspeed.tags = function(tags) {
-	        _tags = tags;
-
-	        var value = tags[field.key];
-	        var isMixed = Array.isArray(value);
+	      if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+	        _toDate = _fromDate;
+	      }
+	    }
 
-	        if (!isMixed) {
-	            if (value && value.indexOf('mph') >= 0) {
-	                value = parseInt(value, 10).toString();
-	                _isImperial = true;
-	            } else if (value) {
-	                _isImperial = false;
-	            }
-	        }
+	    if (type === _dateFilters[1]) {
+	      _toDate = val;
 
-	        setUnitSuggestions();
+	      if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+	        _fromDate = _toDate;
+	      }
+	    }
 
-	        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);
-	    };
+	    dispatch$1.call('change', this);
 
+	    if (updateUrl) {
+	      var rangeString;
 
-	    maxspeed.focus = function() {
-	        input.node().focus();
-	    };
+	      if (_fromDate || _toDate) {
+	        rangeString = (_fromDate || '') + '_' + (_toDate || '');
+	      }
 
+	      setUrlFilterValue('photo_dates', rangeString);
+	    }
+	  };
 
-	    maxspeed.entityIDs = function(val) {
-	        _entityIDs = val;
-	    };
+	  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);
 
-	    function combinedEntityExtent() {
-	        return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	      if (!val.length) {
+	        val = null;
+	      }
 	    }
 
+	    _usernames = val;
+	    dispatch$1.call('change', this);
 
-	    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 = [];
+	    if (updateUrl) {
+	      var hashString;
 
+	      if (_usernames) {
+	        hashString = _usernames.join(',');
+	      }
 
-	    function selectedKey() {
-	        var node = wrap.selectAll('.form-field-input-radio label.active input');
-	        return !node.empty() && node.datum();
+	      setUrlFilterValue('photo_username', hashString);
 	    }
+	  };
 
+	  function setUrlFilterValue(property, val) {
+	    if (!window.mocha) {
+	      var hash = utilStringQs(window.location.hash);
 
-	    function radio(selection) {
-	        selection.classed('preset-radio', true);
-
-	        wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	      if (val) {
+	        if (hash[property] === val) return;
+	        hash[property] = val;
+	      } else {
+	        if (!(property in hash)) return;
+	        delete hash[property];
+	      }
 
-	        var enter = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-radio');
+	      window.location.replace('#' + utilQsString(hash, true));
+	    }
+	  }
 
-	        enter
-	            .append('span')
-	            .attr('class', 'placeholder');
+	  function showsLayer(id) {
+	    var layer = context.layers().layer(id);
+	    return layer && layer.supported() && layer.enabled();
+	  }
 
-	        wrap = wrap
-	            .merge(enter);
+	  photos.shouldFilterByDate = function () {
+	    return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
+	  };
 
+	  photos.shouldFilterByPhotoType = function () {
+	    return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('openstreetcam');
+	  };
 
-	        placeholder = wrap.selectAll('.placeholder');
+	  photos.shouldFilterByUsername = function () {
+	    return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
+	  };
 
-	        labels = wrap.selectAll('label')
-	            .data(radioData);
+	  photos.showsPhotoType = function (val) {
+	    if (!photos.shouldFilterByPhotoType()) return true;
+	    return _shownPhotoTypes.indexOf(val) !== -1;
+	  };
 
-	        enter = labels.enter()
-	            .append('label');
+	  photos.showsFlat = function () {
+	    return photos.showsPhotoType('flat');
+	  };
 
-	        enter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', field.id)
-	            .attr('value', function(d) { return field.t('options.' + d, { 'default': d }); })
-	            .attr('checked', false);
+	  photos.showsPanoramic = function () {
+	    return photos.showsPhotoType('panoramic');
+	  };
 
-	        enter
-	            .append('span')
-	            .text(function(d) { return field.t('options.' + d, { 'default': d }); });
+	  photos.fromDate = function () {
+	    return _fromDate;
+	  };
 
-	        labels = labels
-	            .merge(enter);
+	  photos.toDate = function () {
+	    return _toDate;
+	  };
 
-	        radios = labels.selectAll('input')
-	            .on('change', changeRadio);
+	  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;
+	  };
 
-	    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();
+	  photos.usernames = function () {
+	    return _usernames;
+	  };
 
-	        extrasWrap = extrasWrap.enter()
-	            .append('div')
-	            .attr('class', 'structure-extras-wrap')
-	            .merge(extrasWrap);
+	  photos.init = function () {
+	    var hash = utilStringQs(window.location.hash);
 
-	        var list = extrasWrap.selectAll('ul')
-	            .data([0]);
+	    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);
+	    }
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'rows')
-	            .merge(list);
+	    if (hash.photo_username) {
+	      this.setUsernameFilter(hash.photo_username, false);
+	    }
 
+	    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);
+	      });
+	    }
 
-	        // Type
-	        if (type) {
-	            if (!typeField || typeField.id !== selected) {
-	                typeField = uiField(context, type, _entityIDs, { wrap: false })
-	                    .on('change', changeType);
+	    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;
 	            }
-	            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)
-	            .text(_t('inspector.radio.structure.type'));
+	            if (!service.cachedImage(photoKey)) return;
+	            service.on('loadedImages.rendererPhotos', null);
+	            service.ensureViewerLoaded(context).then(function () {
+	              service.selectImage(context, photoKey).showViewer(context);
+	            });
+	          });
+	        }
+	      }
+	    }
 
-	        typeEnter
-	            .append('div')
-	            .attr('class', 'structure-input-type-wrap');
+	    context.layers().on('change.rendererPhotos', updateStorage);
+	  };
 
-	        // Update
-	        typeItem = typeItem
-	            .merge(typeEnter);
+	  return utilRebind(photos, dispatch$1, 'on');
+	}
 
-	        if (typeField) {
-	            typeItem.selectAll('.structure-input-type-wrap')
-	                .call(typeField.render);
-	        }
+	function uiAccount(context) {
+	  var osm = context.connection();
 
+	  function update(selection) {
+	    if (!osm) return;
 
-	        // 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 (!osm.authenticated()) {
+	      selection.selectAll('.userLink, .logoutLink').classed('hide', true);
+	      return;
+	    }
 
-	        var layerItem = list.selectAll('.structure-layer-item')
-	            .data(layerField ? [layerField] : []);
+	    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
 
-	        // Exit
-	        layerItem.exit()
-	            .remove();
+	      var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont
 
-	        // Enter
-	        var layerEnter = layerItem.enter()
-	            .append('li')
-	            .attr('class', 'labeled-input structure-layer-item');
+	      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
 
-	        layerEnter
-	            .append('span')
-	            .attr('class', 'label structure-label-layer')
-	            .attr('for', 'preset-input-layer')
-	            .text(_t('inspector.radio.structure.layer'));
 
-	        layerEnter
-	            .append('div')
-	            .attr('class', 'structure-input-layer-wrap');
+	      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();
+	      });
+	    });
+	  }
 
-	        // Update
-	        layerItem = layerItem
-	            .merge(layerEnter);
+	  return function (selection) {
+	    selection.append('li').attr('class', 'userLink').classed('hide', true);
+	    selection.append('li').attr('class', 'logoutLink').classed('hide', true);
 
-	        if (layerField) {
-	            layerItem.selectAll('.structure-input-layer-wrap')
-	                .call(layerField.render);
-	        }
+	    if (osm) {
+	      osm.on('change.account', function () {
+	        update(selection);
+	      });
+	      update(selection);
 	    }
+	  };
+	}
 
+	function uiAttribution(context) {
+	  var _selection = select(null);
 
-	    function changeType(t, onInput) {
-	        var key = selectedKey();
-	        if (!key) { return; }
+	  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]);
 
-	        var val = t[key];
-	        if (val !== 'no') {
-	            _oldType[key] = val;
-	        }
+	      if (d.terms_html) {
+	        attribution.html(d.terms_html);
+	        return;
+	      }
 
-	        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 (d.terms_url) {
+	        attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
+	      }
 
-	        dispatch$1.call('change', this, t, onInput);
-	    }
+	      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 (d.icon && !d.overlay) {
+	        attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
+	      }
 
-	    function changeLayer(t, onInput) {
-	        if (t.layer === '0') {
-	            t.layer = undefined;
-	        }
-	        dispatch$1.call('change', this, t, onInput);
-	    }
+	      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);
+	  }
 
+	  function update() {
+	    var baselayer = context.background().baseLayerSource();
 
-	    function changeRadio() {
-	        var t = {};
-	        var activeKey;
+	    _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');
 
-	        if (field.key) {
-	            t[field.key] = undefined;
-	        }
+	    var z = context.map().zoom();
+	    var overlays = context.background().overlayLayerSources() || [];
 
-	        radios.each(function(d) {
-	            var active = select(this).property('checked');
-	            if (active) { activeKey = d; }
+	    _selection.call(render, overlays.filter(function (s) {
+	      return s.validZoom(z);
+	    }), 'overlay-layer-attribution');
+	  }
 
-	            if (field.key) {
-	                if (active) { t[field.key] = d; }
-	            } else {
-	                var val = _oldType[activeKey] || 'yes';
-	                t[d] = active ? val : undefined;
-	            }
-	        });
+	  return function (selection) {
+	    _selection = selection;
+	    context.background().on('change.attribution', update);
+	    context.map().on('move.attribution', throttle(update, 400, {
+	      leading: false
+	    }));
+	    update();
+	  };
+	}
 
-	        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 uiContributors(context) {
+	  var osm = context.connection(),
+	      debouncedUpdate = debounce(function () {
+	    update();
+	  }, 1000),
+	      limit = 4,
+	      hidden = false,
+	      wrap = select(null);
 
-	        dispatch$1.call('change', this, t);
+	  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()
+	      }));
 	    }
 
+	    if (!u.length) {
+	      hidden = true;
+	      wrap.transition().style('opacity', 0);
+	    } else if (hidden) {
+	      wrap.transition().style('opacity', 1);
+	    }
+	  }
 
-	    radio.tags = function(tags) {
+	  return function (selection) {
+	    if (!osm) return;
+	    wrap = selection;
+	    update();
+	    osm.on('loaded.contributors', debouncedUpdate);
+	    context.map().on('move.contributors', debouncedUpdate);
+	  };
+	}
 
-	        radios.property('checked', function(d) {
-	            if (field.key) {
-	                return tags[field.key] === d;
-	            }
-	            return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
-	        });
+	var _popoverID = 0;
+	function uiPopover(klass) {
+	  var _id = _popoverID++;
 
-	        function isMixed(d) {
-	            if (field.key) {
-	                return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
-	            }
-	            return Array.isArray(tags[d]);
-	        }
+	  var _anchorSelection = select(null);
 
-	        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;
-	            });
+	  var popover = function popover(selection) {
+	    _anchorSelection = selection;
+	    selection.each(setup);
+	  };
 
+	  var _animation = utilFunctor(false);
 
-	        var selection = radios.filter(function() { return this.checked; });
+	  var _placement = utilFunctor('top'); // top, bottom, left, right
 
-	        if (selection.empty()) {
-	            placeholder.text(_t('inspector.none'));
-	        } else {
-	            placeholder.text(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';
-	            }
+	  var _alignment = utilFunctor('center'); // leading, center, trailing
 
-	            wrap.call(structureExtras, tags);
-	        }
-	    };
 
+	  var _scrollContainer = utilFunctor(select(null));
 
-	    radio.focus = function() {
-	        radios.node().focus();
-	    };
+	  var _content;
 
+	  var _displayType = utilFunctor('');
 
-	    radio.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        _oldType = {};
-	        return radio;
-	    };
+	  var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events
 
 
-	    radio.isAllowed = function() {
-	        return _entityIDs.length === 1;
-	    };
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
+	  popover.displayType = function (val) {
+	    if (arguments.length) {
+	      _displayType = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _displayType;
+	    }
+	  };
 
-	    return utilRebind(radio, dispatch$1, 'on');
-	}
+	  popover.hasArrow = function (val) {
+	    if (arguments.length) {
+	      _hasArrow = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _hasArrow;
+	    }
+	  };
 
-	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
-	        );
+	  popover.placement = function (val) {
+	    if (arguments.length) {
+	      _placement = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _placement;
+	    }
+	  };
 
-	        // Also hide in the case where
-	        select(selection.node().parentNode).classed('hide', !isOK);
+	  popover.alignment = function (val) {
+	    if (arguments.length) {
+	      _alignment = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _alignment;
+	    }
+	  };
 
-	        // 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;
-	        }
+	  popover.scrollContainer = function (val) {
+	    if (arguments.length) {
+	      _scrollContainer = utilFunctor(val);
+	      return popover;
+	    } else {
+	      return _scrollContainer;
+	    }
+	  };
 
+	  popover.content = function (val) {
+	    if (arguments.length) {
+	      _content = val;
+	      return popover;
+	    } else {
+	      return _content;
+	    }
+	  };
 
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	  popover.isShown = function () {
+	    var popoverSelection = _anchorSelection.select('.popover-' + _id);
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	    return !popoverSelection.empty() && popoverSelection.classed('in');
+	  };
 
-	        var container = wrap.selectAll('.restriction-container')
-	            .data([0]);
+	  popover.show = function () {
+	    _anchorSelection.each(show);
+	  };
 
-	        // enter
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'restriction-container');
+	  popover.updateContent = function () {
+	    _anchorSelection.each(updateContent);
+	  };
 
-	        containerEnter
-	            .append('div')
-	            .attr('class', 'restriction-help');
+	  popover.hide = function () {
+	    _anchorSelection.each(hide);
+	  };
 
-	        // update
-	        _container = containerEnter
-	            .merge(container)
-	            .call(renderViewer);
+	  popover.toggle = function () {
+	    _anchorSelection.each(toggle);
+	  };
 
-	        var controls = wrap.selectAll('.restriction-controls')
-	            .data([0]);
+	  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();
+	  };
 
-	        // enter/update
-	        controls.enter()
-	            .append('div')
-	            .attr('class', 'restriction-controls-container')
-	            .append('div')
-	            .attr('class', 'restriction-controls')
-	            .merge(controls)
-	            .call(renderControls);
-	    }
+	  popover.destroyAny = function (selection) {
+	    selection.call(popover.destroy, '.popover');
+	  };
 
+	  function setup() {
+	    var anchor = select(this);
 
-	    function renderControls(selection) {
-	        var distControl = selection.selectAll('.restriction-distance')
-	            .data([0]);
+	    var animate = _animation.apply(this, arguments);
 
-	        distControl.exit()
-	            .remove();
+	    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);
 
-	        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);
-	            });
+	    if (animate) {
+	      popoverSelection.classed('fade', true);
+	    }
 
-	        selection.selectAll('.restriction-distance-text')
-	            .text(displayMaxDistance(_maxDistance));
+	    var display = _displayType.apply(this, arguments);
 
+	    if (display === 'hover') {
+	      var _lastNonMouseEnterTime;
 
-	        var viaControl = selection.selectAll('.restriction-via-way')
-	            .data([0]);
+	      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
 
-	        viaControl.exit()
-	            .remove();
+	            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);
+	        });
+	      });
+	    }
+	  }
 
-	        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);
-	            });
+	  function show() {
+	    var anchor = select(this);
+	    var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-	        selection.selectAll('.restriction-via-way-text')
-	            .text(displayMaxVia(_maxViaWay));
+	    if (popoverSelection.empty()) {
+	      // popover was removed somehow, put it back
+	      anchor.call(popover.destroy);
+	      anchor.each(setup);
+	      popoverSelection = anchor.selectAll('.popover-' + _id);
 	    }
 
+	    popoverSelection.classed('in', true);
 
-	    function renderViewer(selection) {
-	        if (!_intersection) { return; }
+	    var displayType = _displayType.apply(this, arguments);
 
-	        var vgraph = _intersection.graph;
-	        var filter = utilFunctor(true);
-	        var projection = geoRawMercator();
+	    if (displayType === 'clickFocus') {
+	      anchor.classed('active', true);
+	      popoverSelection.node().focus();
+	    }
 
-	        // 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;
+	    anchor.each(updateContent);
+	  }
 
-	        projection.scale(geoZoomToScale(z));
+	  function updateContent() {
+	    var anchor = select(this);
 
-	        // 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 (_content) {
+	      anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
+	    }
 
-	        // 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));
-	        }
+	    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
 
-	        var padTop = 35;   // reserve top space for hint text
-	        var extentCenter = projection(extent.center());
-	        extentCenter[1] = extentCenter[1] - padTop;
+	    updatePosition.apply(this, arguments);
+	    updatePosition.apply(this, arguments);
+	  }
 
-	        projection
-	            .translate(geoVecSubtract(c, extentCenter))
-	            .clipExtent([[0, 0], d]);
+	  function updatePosition() {
+	    var anchor = select(this);
+	    var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-	        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 scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
 
-	        var firstTime = selection.selectAll('.surface').empty();
+	    var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
+	    var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
+	    var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
 
-	        selection
-	            .call(drawLayers);
+	    var placement = _placement.apply(this, arguments);
 
-	        var surface = selection.selectAll('.surface')
-	            .classed('tr', true);
+	    popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);
 
-	        if (firstTime) {
-	            _initialized = true;
+	    var alignment = _alignment.apply(this, arguments);
 
-	            surface
-	                .call(breathe);
-	        }
+	    var alignFactor = 0.5;
 
-	        // 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;
-	        }
+	    if (alignment === 'leading') {
+	      alignFactor = 0;
+	    } else if (alignment === 'trailing') {
+	      alignFactor = 1;
+	    }
 
-	        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));
+	    var anchorFrame = getFrame(anchor.node());
+	    var popoverFrame = getFrame(popoverSelection.node());
+	    var position;
 
-	        surface
-	            .on('click.restrictions', click)
-	            .on('mouseover.restrictions', mouseover);
+	    switch (placement) {
+	      case 'top':
+	        position = {
+	          x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+	          y: anchorFrame.y - popoverFrame.h
+	        };
+	        break;
 
-	        surface
-	            .selectAll('.selected')
-	            .classed('selected', false);
+	      case 'bottom':
+	        position = {
+	          x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+	          y: anchorFrame.y + anchorFrame.h
+	        };
+	        break;
 
-	        surface
-	            .selectAll('.related')
-	            .classed('related', false);
+	      case 'left':
+	        position = {
+	          x: anchorFrame.x - popoverFrame.w,
+	          y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+	        };
+	        break;
 
-	        if (_fromWayID) {
-	            var way = vgraph.entity(_fromWayID);
-	            surface
-	                .selectAll('.' + _fromWayID)
-	                .classed('selected', true)
-	                .classed('related', true);
-	        }
+	      case 'right':
+	        position = {
+	          x: anchorFrame.x + anchorFrame.w,
+	          y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+	        };
+	        break;
+	    }
 
-	        document.addEventListener('resizeWindow', function () {
-	            utilSetDimensions(_container, null);
-	            redraw(1);
-	        }, false);
+	    if (position) {
+	      if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+	        var initialPosX = position.x;
 
-	        updateHints(null);
+	        if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
+	          position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
+	        } else if (position.x < 10) {
+	          position.x = 10;
+	        }
 
+	        var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible
 
-	        function click() {
-	            surface
-	                .call(breathe.off)
-	                .call(breathe);
+	        var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
+	        arrow.style('left', ~~arrowPosX + 'px');
+	      }
 
-	            var datum = event.target.__data__;
-	            var entity = datum && datum.properties && datum.properties.entity;
-	            if (entity) {
-	                datum = entity;
-	            }
+	      popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
+	    } else {
+	      popoverSelection.style('left', null).style('top', null);
+	    }
 
-	            if (datum instanceof osmWay && (datum.__from || datum.__via)) {
-	                _fromWayID = datum.id;
-	                _oldTurns = null;
-	                redraw();
+	    function getFrame(node) {
+	      var positionStyle = select(node).style('position');
 
-	            } else if (datum instanceof osmTurn) {
-	                var actions, extraActions, turns, i;
-	                var restrictionType = osmInferRestriction(vgraph, datum, projection);
+	      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 (datum.restrictionID && !datum.direct) {
-	                    return;
+	  function hide() {
+	    var anchor = select(this);
 
-	                } 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));
-	                        }
-	                    }
+	    if (_displayType.apply(this, arguments) === 'clickFocus') {
+	      anchor.classed('active', false);
+	    }
 
-	                    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')
-	                    ]);
-	                }
+	    anchor.selectAll('.popover-' + _id).classed('in', false);
+	  }
 
-	                context.perform.apply(context, actions);
+	  function toggle() {
+	    if (select(this).select('.popover-' + _id).classed('in')) {
+	      hide.apply(this, arguments);
+	    } else {
+	      show.apply(this, arguments);
+	    }
+	  }
 
-	                // 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);
+	  return popover;
+	}
 
-	            } else {
-	                _fromWayID = null;
-	                _oldTurns = null;
-	                redraw();
-	            }
-	        }
+	function uiTooltip(klass) {
+	  var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');
 
+	  var _title = function _title() {
+	    var title = this.getAttribute('data-original-title');
 
-	        function mouseover() {
-	            var datum = event.target.__data__;
-	            updateHints(datum);
-	        }
+	    if (title) {
+	      return title;
+	    } else {
+	      title = this.getAttribute('title');
+	      this.removeAttribute('title');
+	      this.setAttribute('data-original-title', title);
+	    }
 
-	        _lastXPos = _lastXPos || sdims[0];
+	    return title;
+	  };
 
-	        function redraw(minChange) {
-	            var xPos = -1;
+	  var _heading = utilFunctor(null);
 
-	            if (minChange) {
-	                xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
-	            }
+	  var _keys = utilFunctor(null);
 
-	            if (!minChange || (minChange && Math.abs(xPos - _lastXPos) >= minChange)) {
-	                if (context.hasEntity(_vertexID)) {
-	                    _lastXPos = xPos;
-	                    _container.call(renderViewer);
-	                }
-	            }
-	        }
+	  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;
+	  };
 
-	        function highlightPathsFrom(wayID) {
-	            surface.selectAll('.related')
-	                .classed('related', false)
-	                .classed('allow', false)
-	                .classed('restrict', false)
-	                .classed('only', false);
+	  tooltip.keys = function (val) {
+	    if (!arguments.length) return _keys;
+	    _keys = utilFunctor(val);
+	    return tooltip;
+	  };
 
-	            surface.selectAll('.' + wayID)
-	                .classed('related', true);
+	  tooltip.content(function () {
+	    var heading = _heading.apply(this, arguments);
 
-	            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'));
+	    var text = _title.apply(this, arguments);
 
-	                    if (turn.only || turns.length === 1) {
-	                        if (turn.via.ways) {
-	                            ids = ids.concat(turn.via.ways);
-	                        }
-	                    } else if (turn.to.way === wayID) {
-	                        continue;
-	                    }
+	    var keys = _keys.apply(this, arguments);
 
-	                    surface.selectAll(utilEntitySelector(ids))
-	                        .classed('related', true)
-	                        .classed('allow', (klass === 'allow'))
-	                        .classed('restrict', (klass === 'restrict'))
-	                        .classed('only', (klass === 'only'));
-	                }
-	            }
-	        }
+	    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;
+	}
 
+	function uiEditMenu(context) {
+	  var dispatch$1 = dispatch('toggled');
 
-	        function updateHints(datum) {
-	            var help = _container.selectAll('.restriction-help').html('');
+	  var _menu = select(null);
 
-	            var placeholders = {};
-	            ['from', 'via', 'to'].forEach(function(k) {
-	                placeholders[k] = '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>';
-	            });
+	  var _operations = []; // the position the menu should be displayed relative to
 
-	            var entity = datum && datum.properties && datum.properties.entity;
-	            if (entity) {
-	                datum = entity;
-	            }
+	  var _anchorLoc = [0, 0];
+	  var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened
 
-	            if (_fromWayID) {
-	                way = vgraph.entity(_fromWayID);
-	                surface
-	                    .selectAll('.' + _fromWayID)
-	                    .classed('selected', true)
-	                    .classed('related', true);
-	            }
+	  var _triggerType = '';
+	  var _vpTopMargin = 85; // viewport top margin
 
-	            // 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 _vpBottomMargin = 45; // viewport bottom margin
 
-	                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); }
-	                    }
+	  var _vpSideMargin = 35; // viewport side margin
 
-	                    help
-	                        .append('div')      // "VIA {viaNames}"
-	                        .html(_t('restriction.help.via_names', {
-	                            via: placeholders.via,
-	                            viaNames: names.join(', ')
-	                        }));
-	                }
+	  var _menuTop = false;
 
-	                if (!indirect) {
-	                    help
-	                        .append('div')      // Click for "No Right Turn"
-	                        .text(_t('restriction.help.toggle', { turn: nextText.trim() }));
-	                }
+	  var _menuHeight;
 
-	                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 _menuWidth; // hardcode these values to make menu positioning easier
 
 
-	            // 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
-	                        }));
-	                }
-	            }
-	        }
-	    }
+	  var _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin
 
+	  var _tooltipWidth = 210; // offset the menu slightly from the target location
 
-	    function displayMaxDistance(maxDist) {
-	        var isImperial = !_mainLocalizer.usesMetric();
-	        var opts;
+	  var _menuSideMargin = 10;
+	  var _tooltips = [];
 
-	        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 editMenu = function editMenu(selection) {
+	    var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
 
-	        return _t('restriction.controls.distance_up_to', opts);
-	    }
+	    var ops = _operations.filter(function (op) {
+	      return !isTouchMenu || !op.mouseOnly;
+	    });
 
+	    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
 
-	    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');
-	    }
+	    _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips
 
+	    var showLabels = isTouchMenu;
+	    var buttonHeight = showLabels ? 32 : 34;
 
-	    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 (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;
 	    }
 
+	    _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+	    _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
 
-	    restrictions.entityIDs = function(val) {
-	        _intersection = null;
-	        _fromWayID = null;
-	        _oldTurns = null;
-	        _vertexID = val[0];
-	    };
-
-
-	    restrictions.tags = function() {};
-	    restrictions.focus = function() {};
+	    var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter
 
 
-	    restrictions.off = function(selection) {
-	        if (!_initialized) { return; }
+	    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]]);
 
-	        selection.selectAll('.surface')
-	            .call(breathe.off)
-	            .on('click.restrictions', null)
-	            .on('mouseover.restrictions', null);
+	      _tooltips.push(tooltip);
 
-	        select(window)
-	            .on('resize.restrictions', null);
-	    };
+	      select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon('#iD-operation-' + d.id, 'operation'));
+	    });
 
+	    if (showLabels) {
+	      buttonsEnter.append('span').attr('class', 'label').html(function (d) {
+	        return d.title;
+	      });
+	    } // update
 
-	    return utilRebind(restrictions, dispatch$1, 'on');
-	}
 
-	uiFieldRestrictions.supportsMultiselection = false;
+	    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`
 
-	function uiFieldTextarea(field, context) {
-	    var dispatch$1 = dispatch('change');
-	    var input = select(null);
-	    var _tags;
+	    function pointerup(d3_event) {
+	      lastPointerUpType = d3_event.pointerType;
+	    }
 
+	    function click(d3_event, operation) {
+	      d3_event.stopPropagation();
 
-	    function textarea(selection) {
-	        var wrap = selection.selectAll('.form-field-input-wrap')
-	            .data([0]);
+	      if (operation.relatedEntityIds) {
+	        utilHighlightEntities(operation.relatedEntityIds(), false, context);
+	      }
 
-	        wrap = wrap.enter()
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-	            .merge(wrap);
+	      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)();
+	        }
 
-	        input = wrap.selectAll('textarea')
-	            .data([0]);
+	        operation();
+	        editMenu.close();
+	      }
 
-	        input = input.enter()
-	            .append('textarea')
-	            .attr('id', field.domId)
-	            .call(utilNoAuto)
-	            .on('input', change(true))
-	            .on('blur', change())
-	            .on('change', change())
-	            .merge(input);
+	      lastPointerUpType = null;
 	    }
 
+	    dispatch$1.call('toggled', this, true);
+	  };
 
-	    function change(onInput) {
-	        return function() {
+	  function updatePosition() {
+	    if (!_menu || _menu.empty()) return;
+	    var anchorLoc = context.projection(_anchorLocLonLat);
+	    var viewport = context.surfaceRect();
 
-	            var val = utilGetSetValue(input);
-	            if (!onInput) { val = context.cleanTagValue(val); }
+	    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;
+	    }
 
-	            // don't override multiple values with blank string
-	            if (!val && Array.isArray(_tags[field.key])) { return; }
+	    var menuLeft = displayOnLeft(viewport);
+	    var offset = [0, 0];
+	    offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
 
-	            var t = {};
-	            t[field.key] = val || undefined;
-	            dispatch$1.call('change', this, t, onInput);
-	        };
+	    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;
+	      }
 	    }
 
+	    var origin = geoVecAdd(anchorLoc, offset);
 
-	    textarea.tags = function(tags) {
-	        _tags = tags;
+	    _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');
 
-	        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);
-	    };
+	    var tooltipSide = tooltipPosition(viewport, menuLeft);
 
+	    _tooltips.forEach(function (tooltip) {
+	      tooltip.placement(tooltipSide);
+	    });
 
-	    textarea.focus = function() {
-	        input.node().focus();
-	    };
+	    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 utilRebind(textarea, dispatch$1, 'on');
-	}
+	        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
 
-	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];
 
-	    var combobox = uiCombobox(context, 'combo-' + field.safeid)
-	        .caseSensitive(true)
-	        .minItems(1);
+	        return true;
+	      }
+	    }
 
-	    function wiki(selection) {
+	    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';
+	        }
 
-	        _selection = selection;
+	        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
 
-	        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) {
-	            _qid = d.id;
-	            change();
-	        }).on('cancel', function() {
-	            setLabelForEntity();
-	        });
+	        return 'right';
+	      } else {
+	        // rtl
+	        if (!menuLeft) {
+	          return 'right';
+	        }
 
-	        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 (anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth < _vpSideMargin) {
+	          // left tooltips would be too close to the left viewport edge, go right
+	          return 'right';
+	        } // prefer left tooltips
 
-	        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');
-	            });
 
+	        return 'left';
+	      }
 	    }
+	  }
 
-	    function fetchWikidataItems(q, callback) {
+	  editMenu.close = function () {
+	    context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);
 
-	        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;
-	                }
-	            }
-	        }
+	    _menu.remove();
 
-	        wikidata.itemsForSearchQuery(q, function(err, data) {
-	            if (err) { return; }
+	    _tooltips = [];
+	    dispatch$1.call('toggled', this, false);
+	  };
 
-	            for (var i in data) {
-	                data[i].value = data[i].label + ' (' +  data[i].id + ')';
-	                data[i].title = data[i].description;
-	            }
+	  editMenu.anchorLoc = function (val) {
+	    if (!arguments.length) return _anchorLoc;
+	    _anchorLoc = val;
+	    _anchorLocLonLat = context.projection.invert(_anchorLoc);
+	    return editMenu;
+	  };
 
-	            if (callback) { callback(data); }
-	        });
-	    }
+	  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 change() {
-	        var syncTags = {};
-	        syncTags[field.key] = _qid;
-	        dispatch$1.call('change', this, syncTags);
+	  return utilRebind(editMenu, dispatch$1, 'on');
+	}
 
-	        // attempt asynchronous update of wikidata tag..
-	        var initGraph = context.graph();
-	        var initEntityIDs = _entityIDs;
+	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]
+	        });
+	      }
 
-	        wikidata.entityByQID(_qid, function(err, entity) {
-	            if (err) { return; }
+	      return null;
+	    }).filter(Boolean);
+	    selection.html('');
 
-	            // If graph has changed, we can't apply this update.
-	            if (context.graph() !== initGraph) { return; }
+	    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 (!entity.sitelinks) { return; }
+	        context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
+	      });
+	    }
 
-	            var langs = wikidata.languagesToQuery();
-	            // use the label and description languages as fallbacks
-	            ['labels', 'descriptions'].forEach(function(key) {
-	                if (!entity[key]) { return; }
+	    selection.classed('hide', !hiddenList.length);
+	  }
 
-	                var valueLangs = Object.keys(entity[key]);
-	                if (valueLangs.length === 0) { return; }
-	                var valueLang = valueLangs[0];
+	  return function (selection) {
+	    update(selection);
+	    context.features().on('change.feature_info', function () {
+	      update(selection);
+	    });
+	  };
+	}
 
-	                if (langs.indexOf(valueLang) === -1) {
-	                    langs.push(valueLang);
-	                }
-	            });
+	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;
+	  };
 
-	            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;
-	                    }
-	                }
+	  flash.label = function (_) {
+	    if (!arguments.length) return _label;
+	    _label = _;
+	    return flash;
+	  };
 
-	                if (!foundPreferred) {
-	                    // No wikipedia sites available in the user's language or the fallback languages,
-	                    // default to any wikipedia sitelink
+	  flash.iconName = function (_) {
+	    if (!arguments.length) return _iconName;
+	    _iconName = _;
+	    return flash;
+	  };
 
-	                    var wikiSiteKeys = Object.keys(entity.sitelinks).filter(function(site) {
-	                        return site.endsWith('wiki');
-	                    });
+	  flash.iconClass = function (_) {
+	    if (!arguments.length) return _iconClass;
+	    _iconClass = _;
+	    return flash;
+	  };
 
-	                    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 flash;
+	}
 
-	            if (newWikipediaValue) {
-	                newWikipediaValue = context.cleanTagValue(newWikipediaValue);
-	            }
+	function uiFullScreen(context) {
+	  var element = context.container().node(); // var button = d3_select(null);
 
-	            if (typeof newWikipediaValue === 'undefined') { return; }
+	  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;
+	    }
+	  }
 
-	            var actions = initEntityIDs.map(function(entityID) {
-	                var entity = context.hasEntity(entityID);
-	                if (!entity) { return; }
+	  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 currTags = Object.assign({}, entity.tags);  // shallow copy
-	                if (newWikipediaValue === null) {
-	                    if (!currTags[_wikipediaKey]) { return; }
+	  function isFullScreen() {
+	    return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
+	  }
 
-	                    delete currTags[_wikipediaKey];
-	                } else {
-	                    currTags[_wikipediaKey] = newWikipediaValue;
-	                }
+	  function isSupported() {
+	    return !!getFullScreenFn();
+	  }
 
-	                return actionChangeTags(entityID, currTags);
-	            }).filter(Boolean);
+	  function fullScreen(d3_event) {
+	    d3_event.preventDefault();
 
-	            if (!actions.length) { return; }
+	    if (!isFullScreen()) {
+	      // button.classed('active', true);
+	      getFullScreenFn().apply(element);
+	    } else {
+	      // button.classed('active', false);
+	      getExitFullScreenFn().apply(document);
+	    }
+	  }
 
-	            // 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()
-	            );
+	  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');
 
-	            // do not dispatch.call('change') here, because entity_editor
-	            // changeTags() is not intended to be called asynchronously
-	        });
-	    }
+	    var detected = utilDetect();
+	    var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
+	    context.keybinding().on(keys, fullScreen);
+	  };
+	}
 
-	    function setLabelForEntity() {
-	        var label = '';
-	        if (_wikidataEntity) {
-	            label = entityPropertyForDisplay(_wikidataEntity, 'labels');
-	            if (label.length === 0) {
-	                label = _wikidataEntity.id.toString();
-	            }
-	        }
-	        utilGetSetValue(_searchInput, label);
-	    }
+	function uiGeolocate(context) {
+	  var _geolocationOptions = {
+	    // prioritize speed and power usage over precision
+	    enableHighAccuracy: false,
+	    // don't hang indefinitely getting the location
+	    timeout: 6000 // 6sec
 
+	  };
 
-	    wiki.tags = function(tags) {
+	  var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);
 
-	        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 _layer = context.layers().layer('geolocate');
 
-	        _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
+	  var _position;
 
-	        if (!/^Q[0-9]*$/.test(_qid)) {   // not a proper QID
-	            unrecognized();
-	            return;
-	        }
+	  var _extent;
 
-	        // QID value in correct format
-	        _wikiURL = 'https://wikidata.org/wiki/' + _qid;
-	        wikidata.entityByQID(_qid, function(err, entity) {
-	            if (err) {
-	                unrecognized();
-	                return;
-	            }
-	            _wikidataEntity = entity;
+	  var _timeoutID;
 
-	            setLabelForEntity();
+	  var _button = select(null);
 
-	            var description = entityPropertyForDisplay(entity, 'descriptions');
+	  function click() {
+	    if (context.inIntro()) return;
 
-	            _selection.select('button.wiki-link')
-	                .classed('disabled', false);
+	    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
 
-	            _selection.select('.preset-wikidata-description')
-	                .style('display', function(){
-	                    return description.length > 0 ? 'flex' : 'none';
-	                })
-	                .select('input')
-	                .attr('value', description);
+	      navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
+	    } else {
+	      _locating.close();
 
-	            _selection.select('.preset-wikidata-identifier')
-	                .style('display', function(){
-	                    return entity.id ? 'flex' : 'none';
-	                })
-	                .select('input')
-	                .attr('value', entity.id);
-	        });
+	      _layer.enabled(null, false);
 
+	      updateButtonState();
+	    }
+	  }
 
-	        // not a proper QID
-	        function unrecognized() {
-	            _wikidataEntity = null;
-	            setLabelForEntity();
+	  function zoomTo() {
+	    context.enter(modeBrowse(context));
+	    var map = context.map();
 
-	            _selection.select('.preset-wikidata-description')
-	                .style('display', 'none');
-	            _selection.select('.preset-wikidata-identifier')
-	                .style('display', 'none');
+	    _layer.enabled(_position, true);
 
-	            _selection.select('button.wiki-link')
-	                .classed('disabled', true);
+	    updateButtonState();
+	    map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
+	  }
 
-	            if (_qid && _qid !== '') {
-	                _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
-	            } else {
-	                _wikiURL = '';
-	            }
-	        }
-	    };
+	  function success(geolocation) {
+	    _position = geolocation;
+	    var coords = _position.coords;
+	    _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
+	    zoomTo();
+	    finish();
+	  }
 
-	    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;
+	  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')();
 	    }
 
+	    finish();
+	  }
 
-	    wiki.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return wiki;
-	    };
+	  function finish() {
+	    _locating.close(); // unblock ui
 
 
-	    wiki.focus = function() {
-	        _searchInput.node().focus();
-	    };
+	    if (_timeoutID) {
+	      clearTimeout(_timeoutID);
+	    }
 
+	    _timeoutID = undefined;
+	  }
+
+	  function updateButtonState() {
+	    _button.classed('active', _layer.enabled());
+	  }
 
-	    return utilRebind(wiki, dispatch$1, 'on');
+	  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);
+	  };
 	}
 
-	function uiFieldWikipedia(field, context) {
-	  var arguments$1 = arguments;
+	function uiPanelBackground(context) {
+	  var background = context.background();
+	  var _currSourceName = null;
+	  var _metadata = {};
+	  var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];
 
-	  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 debouncedRedraw = debounce(redraw, 250);
 
-	  var _dataWikipedia = [];
-	  _mainFileFetcher.get('wmf_sitematrix')
-	    .then(function (d) {
-	      _dataWikipedia = d;
-	      if (_tags) { updateForTags(_tags); }
-	    })
-	    .catch(function () { /* ignore */ });
+	  function redraw(selection) {
+	    var source = background.baseLayerSource();
+	    if (!source) return;
+	    var isDG = source.id.match(/^DigitalGlobe/i) !== null;
+	    var sourceLabel = source.label();
 
+	    if (_currSourceName !== sourceLabel) {
+	      _currSourceName = sourceLabel;
+	      _metadata = {};
+	    }
 
-	  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] }); })
-	      );
+	    selection.html('');
+	    var list = selection.append('ul').attr('class', 'background-info');
+	    list.append('li').html(_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]).html(_t.html('info_panels.background.' + k) + ':').append('span').attr('class', 'background-info-span-' + k).html(_metadata[k]);
 	    });
 
-	  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;
-	          }
+	    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);
+	    });
+
+	    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
+
+
+	    ['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);
 	        }
 	      }
-	      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 debouncedGetMetadata = debounce(getMetadata, 250);
 
-	  function wiki(selection) {
-	    var wrap = selection.selectAll('.form-field-input-wrap')
-	      .data([0]);
+	  function getMetadata(selection) {
+	    var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center
 
-	    wrap = wrap.enter()
-	      .append('div')
-	      .attr('class', ("form-field-input-wrap form-field-input-" + (field.type)))
-	      .merge(wrap);
+	    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
 
-	    var langContainer = wrap.selectAll('.wiki-lang-container')
-	      .data([0]);
+	      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
 
-	    langContainer = langContainer.enter()
-	      .append('div')
-	      .attr('class', 'wiki-lang-container')
-	      .merge(langContainer);
+	      _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).html(val);
+	      });
+	    });
+	  }
 
+	  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);
+	    });
+	  };
 
-	    _langInput = langContainer.selectAll('input.wiki-lang')
-	      .data([0]);
+	  panel.off = function () {
+	    context.map().on('drawn.info-background', null).on('move.info-background', null);
+	  };
 
-	    _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);
+	  panel.id = 'background';
+	  panel.label = _t.html('info_panels.background.title');
+	  panel.key = _t('info_panels.background.key');
+	  return panel;
+	}
 
-	    utilGetSetValue(_langInput, language()[1]);
+	function uiPanelHistory(context) {
+	  var osm;
 
-	    _langInput
-	      .on('blur', changeLang)
-	      .on('change', changeLang);
+	  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);
+	  }
 
+	  function displayUser(selection, userName) {
+	    if (!userName) {
+	      selection.append('span').html(_t.html('info_panels.history.unknown'));
+	      return;
+	    }
 
-	    var titleContainer = wrap.selectAll('.wiki-title-container')
-	      .data([0]);
+	    selection.append('span').attr('class', 'user-name').html(userName);
+	    var links = selection.append('div').attr('class', 'links');
 
-	    titleContainer = titleContainer.enter()
-	      .append('div')
-	      .attr('class', 'wiki-title-container')
-	      .merge(titleContainer);
+	    if (osm) {
+	      links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').html('OSM');
+	    }
 
-	    _titleInput = titleContainer.selectAll('input.wiki-title')
-	      .data([0]);
+	    links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).html('HDYC');
+	  }
 
-	    _titleInput = _titleInput.enter()
-	      .append('input')
-	      .attr('type', 'text')
-	      .attr('class', 'wiki-title')
-	      .attr('id', field.domId)
-	      .call(utilNoAuto)
-	      .call(titleCombo)
-	      .merge(_titleInput);
+	  function displayChangeset(selection, changeset) {
+	    if (!changeset) {
+	      selection.append('span').html(_t.html('info_panels.history.unknown'));
+	      return;
+	    }
 
-	    _titleInput
-	      .on('blur', blur)
-	      .on('change', change);
+	    selection.append('span').attr('class', 'changeset-id').html(changeset);
+	    var links = selection.append('div').attr('class', 'links');
 
+	    if (osm) {
+	      links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').html('OSM');
+	    }
 
-	    var link = titleContainer.selectAll('.wiki-link')
-	      .data([0]);
+	    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');
+	  }
 
-	    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);
+	  function redraw(selection) {
+	    var selectedNoteID = context.selectedNoteID();
+	    osm = context.connection();
+	    var selected, note, entity;
 
-	    link
-	      .on('click', function () {
-	        event.preventDefault();
-	        if (_wikiURL) { window.open(_wikiURL, '_blank'); }
+	    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]);
+	      }
+	    }
 
-	  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'];
+	    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 redrawNote(selection, note) {
+	    if (!note || note.isNew()) {
+	      selection.append('div').html(_t.html('info_panels.history.note_no_history'));
+	      return;
+	    }
 
-	  function changeLang() {
-	    utilGetSetValue(_langInput, language()[1]);
-	    change(true);
-	  }
+	    var list = selection.append('ul');
+	    list.append('li').html(_t.html('info_panels.history.note_comments') + ':').append('span').html(note.comments.length);
 
+	    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);
+	    }
 
-	  function blur() {
-	    change(true);
+	    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 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 = {};
+	    var links = selection.append('div').attr('class', 'links');
 
-	    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);
+	    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');
 	    }
 
-	    if (value) {
-	      syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
+	    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);
+	  }
+
+	  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);
+	    });
+	  };
+
+	  panel.off = function () {
+	    context.map().on('drawn.info-history', null);
+	    context.on('enter.info-history', null);
+	  };
+
+	  panel.id = 'history';
+	  panel.label = _t.html('info_panels.history.title');
+	  panel.key = _t('info_panels.history.key');
+	  return panel;
+	}
+
+	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 {
-	      syncTags.wikipedia = undefined;
+	      unit = 'feet';
+	    }
+	  } else {
+	    if (d >= 1000) {
+	      d /= 1000;
+	      unit = 'kilometers';
+	    } else {
+	      unit = 'meters';
 	    }
+	  }
 
-	    dispatch$1.call('change', this, syncTags);
+	  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
+	 */
 
+	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';
+	    }
 
-	    if (skipWikidata || !value || !language()[2]) { return; }
+	    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';
+	    }
 
-	    // attempt asynchronous update of wikidata tag..
-	    var initGraph = context.graph();
-	    var initEntityIDs = _entityIDs;
+	    if (d > 1000 && d < 10000000) {
+	      // 0.1 - 1000 hectares
+	      d2 = d / 10000;
+	      unit2 = 'hectares';
+	    }
+	  }
 
-	    wikidata.itemsByTitle(language()[2], value, function (err, data) {
-	      if (err || !data || !Object.keys(data).length) { return; }
+	  area = _t('units.' + unit1, {
+	    quantity: d1.toLocaleString(locale, {
+	      maximumSignificantDigits: 4
+	    })
+	  });
 
-	      // If graph has changed, we can't apply this update.
-	      if (context.graph() !== initGraph) { return; }
+	  if (d2) {
+	    return _t('units.area_pair', {
+	      area1: area,
+	      area2: _t('units.' + unit2, {
+	        quantity: d2.toLocaleString(locale, {
+	          maximumSignificantDigits: 2
+	        })
+	      })
+	    });
+	  } else {
+	    return area;
+	  }
+	}
 
-	      var qids = Object.keys(data);
-	      var value = qids && qids.find(function (id) { return id.match(/^Q\d+$/); });
+	function wrap$2(x, min, max) {
+	  var d = max - min;
+	  return ((x - min) % d + d) % d + min;
+	}
 
-	      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);
+	function clamp$1(x, min, max) {
+	  return Math.max(min, Math.min(x, max));
+	}
 
-	      if (!actions.length) { return; }
+	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;
 
-	      // 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 (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)
+	    });
+	  }
 
-	      // do not dispatch.call('change') here, because entity_editor
-	      // changeTags() is not intended to be called asynchronously
+	  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
+	 */
 
 
-	  wiki.tags = function (tags) {
-	    _tags = tags;
-	    updateForTags(tags);
-	  };
+	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 updateForTags(tags) {
+	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)
+	  });
+	}
 
-	    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 uiPanelLocation(context) {
+	  var currLocation = '';
 
-	    // 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) : '');
+	  function redraw(selection) {
+	    selection.html('');
+	    var list = selection.append('ul'); // Mouse coordinates
 
-	    // unrecognized value format
-	    } else {
-	      utilGetSetValue(_titleInput, value);
-	      if (value && value !== '') {
-	        utilGetSetValue(_langInput, '');
-	        _wikiURL = "https://en.wikipedia.org/wiki/Special:Search?search=" + value;
-	      } else {
-	        _wikiURL = '';
-	      }
+	    var coord = context.map().mouseCoordinates();
+
+	    if (coord.some(isNaN)) {
+	      coord = context.map().center();
 	    }
-	  }
 
+	    list.append('li').html(dmsCoordinatePair(coord)).append('li').html(decimalCoordinatePair(coord)); // Location Info
 
-	  wiki.entityIDs = function (val) {
-	    if (!arguments$1.length) { return _entityIDs; }
-	    _entityIDs = val;
-	    return wiki;
-	  };
+	    selection.append('div').attr('class', 'location-info').html(currLocation || ' ');
+	    debouncedGetLocation(selection, coord);
+	  }
 
+	  var debouncedGetLocation = debounce(getLocation, 250);
 
-	  wiki.focus = function () {
-	    _titleInput.node().focus();
+	  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);
+	      });
+	    }
+	  }
+
+	  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 utilRebind(wiki, dispatch$1, 'on');
+	  panel.id = 'location';
+	  panel.label = _t.html('info_panels.location.title');
+	  panel.key = _t('info_panels.location.key');
+	  return panel;
 	}
 
-	uiFieldWikipedia.supportsMultiselection = false;
+	function uiPanelMeasurement(context) {
+	  function radiansToMeters(r) {
+	    // using WGS84 authalic radius (6371007.1809 m)
+	    return r * 6371007.1809;
+	  }
 
-	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
-	};
+	  function steradiansToSqmeters(r) {
+	    // http://gis.stackexchange.com/a/124857/40446
+	    return r / (4 * Math.PI) * 510065621724000;
+	  }
 
-	function uiField(context, presetField, entityIDs, options) {
-	    options = Object.assign({
-	        show: true,
-	        wrap: true,
-	        remove: true,
-	        revert: true,
-	        info: true
-	    }, options);
+	  function toLineString(feature) {
+	    if (feature.type === 'LineString') return feature;
+	    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];
+	    }
+
+	    return result;
+	  }
 
-	    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 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
+	      });
 
-	    var _locked = false;
-	    var _lockedTip = uiTooltip()
-	        .title(_t('inspector.lock.suggestion', { label: field.label }))
-	        .placement('bottom');
+	      if (selected.length) {
+	        var extent = geoExtent();
 
+	        for (var i in selected) {
+	          var entity = selected[i];
 
-	    field.keys = field.keys || [field.key];
+	          extent._extend(entity.extent(graph));
 
-	    // only create the fields that are actually being shown
-	    if (_show && !field.impl) {
-	        createField();
-	    }
+	          geometry = entity.geometry(graph);
 
-	    // 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);
-	            });
+	          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 (entityIDs) {
-	            field.entityIDs = entityIDs;
-	            // if this field cares about the entities, pass them along
-	            if (field.impl.entityIDs) {
-	                field.impl.entityIDs(entityIDs);
+	            if (closed) {
+	              area += steradiansToSqmeters(entity.area(graph));
 	            }
+	          }
 	        }
-	    }
 
+	        if (selected.length > 1) {
+	          geometry = null;
+	          closed = null;
+	          centroid = null;
+	        }
 
-	    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];
-	            });
-	        });
-	    }
+	        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 {
+	          totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
+	        }
 
-	    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;
-	        });
+	        if (!location && !centroid) {
+	          center = extent.center();
+	        }
+	      }
 	    }
 
+	    selection.html('');
+
+	    if (heading) {
+	      selection.append('h4').attr('class', 'measurement-heading').html(heading);
+	    }
 
-	    function revert(d) {
-	        event.stopPropagation();
-	        event.preventDefault();
-	        if (!entityIDs || _locked) { return; }
+	    var list = selection.append('ul');
+	    var coordItem;
 
-	        dispatch$1.call('revert', d, d.keys);
+	    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 remove(d) {
-	        event.stopPropagation();
-	        event.preventDefault();
-	        if (_locked) { return; }
+	    if (area) {
+	      list.append('li').html(_t.html('info_panels.measurement.area') + ':').append('span').html(displayArea(area, isImperial));
+	    }
 
-	        var t = {};
-	        d.keys.forEach(function(key) {
-	            t[key] = undefined;
-	        });
+	    if (length) {
+	      list.append('li').html(_t.html('info_panels.measurement.' + (closed ? 'perimeter' : 'length')) + ':').append('span').html(displayLength(length, isImperial));
+	    }
 
-	        dispatch$1.call('change', d, t);
+	    if (typeof distance === 'number') {
+	      list.append('li').html(_t.html('info_panels.measurement.distance') + ':').append('span').html(displayLength(distance, isImperial));
 	    }
 
+	    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));
+	    }
 
-	    field.render = function(selection) {
-	        var container = selection.selectAll('.form-field')
-	            .data([field]);
+	    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));
+	    }
 
-	        // 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'));
-	            }
+	    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));
+	    }
 
-	            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'));
-	            }
-	        }
+	    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);
+	      });
+	    }
+	  }
 
+	  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);
+	    });
+	  };
 
-	        // Update
-	        container = container
-	            .merge(enter);
+	  panel.off = function () {
+	    context.map().on('drawn.info-measurement', null);
+	    context.on('enter.info-measurement', null);
+	  };
 
-	        container.select('.field-label > .remove-icon')  // propagate bound data
-	            .on('click', remove);
+	  panel.id = 'measurement';
+	  panel.label = _t.html('info_panels.measurement.title');
+	  panel.key = _t('info_panels.measurement.key');
+	  return panel;
+	}
 
-	        container.select('.field-label > .modified-icon')  // propagate bound data
-	            .on('click', revert);
+	var uiInfoPanels = {
+	  background: uiPanelBackground,
+	  history: uiPanelHistory,
+	  location: uiPanelLocation,
+	  measurement: uiPanelMeasurement
+	};
 
-	        container
-	            .each(function(d) {
-	                var selection = select(this);
+	function uiInfo(context) {
+	  var ids = Object.keys(uiInfoPanels);
+	  var wasActive = ['measurement'];
+	  var panels = {};
+	  var active = {}; // create panels
 
-	                if (!d.impl) {
-	                    createField();
-	                }
+	  ids.forEach(function (k) {
+	    if (!panels[k]) {
+	      panels[k] = uiInfoPanels[k](context);
+	      active[k] = false;
+	    }
+	  });
 
-	                var reference, help;
+	  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]);
+	      });
+	    }
 
-	                // instantiate field help
-	                if (options.wrap && field.type === 'restrictions') {
-	                    help = uiFieldHelp(context, 'restrictions');
-	                }
+	    info.toggle = function (which) {
+	      var activeids = ids.filter(function (k) {
+	        return active[k];
+	      });
 
-	                // instantiate tag reference
-	                if (options.wrap && options.info) {
-	                    var referenceKey = d.key;
-	                    if (d.type === 'multiCombo') {   // lookup key without the trailing ':'
-	                        referenceKey = referenceKey.replace(/:$/, '');
-	                    }
+	      if (which) {
+	        // toggle one
+	        active[which] = !active[which];
 
-	                    reference = uiTagReference(d.reference || { key: referenceKey });
-	                    if (_state === 'hover') {
-	                        reference.showing(false);
-	                    }
-	                }
+	        if (activeids.length === 1 && activeids[0] === which) {
+	          // none active anymore
+	          wasActive = [which];
+	        }
 
-	                selection
-	                    .call(d.impl);
+	        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;
+	          });
+	        }
+	      }
 
-	                // add field help components
-	                if (help) {
-	                    selection
-	                        .call(help.body)
-	                        .select('.field-label')
-	                        .call(help.button);
-	                }
+	      redraw();
+	    };
 
-	                // add tag reference components
-	                if (reference) {
-	                    selection
-	                        .call(reference.body)
-	                        .select('.field-label')
-	                        .call(reference.button);
-	                }
+	    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);
+	      });
+	    });
+	  }
 
-	                d.impl.tags(_tags);
-	            });
+	  return info;
+	}
 
+	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;
 
-	            container
-	                .classed('locked', _locked)
-	                .classed('modified', isModified())
-	                .classed('present', tagsContainFieldKey());
+	  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;
+	  }
 
+	  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`
 
-	            // 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]: []);
+	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;
+	  }
 
-	            icon.exit()
-	                .remove();
+	  return _t.html(id, reps) // use keyboard key styling for shortcuts
+	  .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
+	}
 
-	            icon.enter()
-	                .append('svg')
-	                .attr('class', 'icon')
-	                .append('use')
-	                .attr('xlink:href', '#fas-lock');
+	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
 
-	            container.call(_locked ? _lockedTip : _lockedTip.destroy);
-	    };
 
+	var missingStrings = {};
 
-	    field.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return field;
-	    };
+	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
+	  }
+	}
 
-	    field.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
+	function localize(obj) {
+	  var key; // Assign name if entity has one..
 
-	        if (tagsContainFieldKey() && !_show) {
-	            // always show a field if it has a value to display
-	            _show = true;
-	            if (!field.impl) {
-	                createField();
-	            }
-	        }
+	  var name = obj.tags && obj.tags.name;
 
-	        return field;
-	    };
+	  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..
 
 
-	    field.locked = function(val) {
-	        if (!arguments.length) { return _locked; }
-	        _locked = val;
-	        return field;
-	    };
+	  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
+	      });
 
-	    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$1.call('change', this, t);
+	      if (str) {
+	        if (str.match(/^<.*>$/) !== null) {
+	          delete obj.tags[tag];
+	        } else {
+	          obj.tags[tag] = str;
 	        }
-	    };
+	      }
+	    });
+	  }
 
-	    // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
-	    field.isShown = function() {
-	        return _show;
-	    };
+	  return obj;
+	} // 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
 
-	    // 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() {
+	  var lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right
 
-	        if (entityIDs &&
-	            entityIDs.length > 1 &&
-	            uiFields[field.type].supportsMultiselection === false) { return false; }
+	  var upperBound = Math.cos(threshold * Math.PI / 180); // near straight
 
-	        if (field.geometry && !entityIDs.every(function(entityID) {
-	            return field.matchGeometry(context.graph().geometry(entityID));
-	        })) { return false; }
+	  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);
 
-	        if (field.countryCodes || field.notCountryCodes) {
-	            var extent = combinedEntityExtent();
-	            if (!extent) { return true; }
+	    if (mag > lowerBound && mag < upperBound) {
+	      return false;
+	    }
+	  }
 
-	            var center = extent.center();
-	            var countryCode = iso1A2Code(center);
+	  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;
+	}
 
-	            if (!countryCode) { return false; }
+	function uiCurtain(containerNode) {
+	  var surface = select(null),
+	      tooltip = select(null),
+	      darkness = select(null);
 
-	            countryCode = countryCode.toLowerCase();
+	  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();
 
-	            if (field.countryCodes && field.countryCodes.indexOf(countryCode) === -1) {
-	                return false;
-	            }
-	            if (field.notCountryCodes && field.notCountryCodes.indexOf(countryCode) !== -1) {
-	                return false;
-	            }
-	        }
+	    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
+	   */
 
-	        var prerequisiteTag = field.prerequisiteTag;
 
-	        if (entityIDs &&
-	            !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
-	            prerequisiteTag) {
+	  curtain.reveal = function (box, html, options) {
+	    options = options || {};
 
-	            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 (typeof box === 'string') {
+	      box = select(box).node();
+	    }
 
-	                    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; }
-	        }
+	    if (box && box.getBoundingClientRect) {
+	      box = copyBox(box.getBoundingClientRect());
+	      var containerRect = containerNode.getBoundingClientRect();
+	      box.top -= containerRect.top;
+	      box.left -= containerRect.left;
+	    }
 
-	        return true;
-	    };
+	    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;
 
-	    field.focus = function() {
-	        if (field.impl) {
-	            field.impl.focus();
-	        }
-	    };
+	    if (options.tooltipBox) {
+	      tooltipBox = options.tooltipBox;
 
+	      if (typeof tooltipBox === 'string') {
+	        tooltipBox = select(tooltipBox).node();
+	      }
 
-	    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());
+	      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..
 
-	    return utilRebind(field, dispatch$1, 'on');
-	}
 
-	function uiFormFields(context) {
-	    var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
-	    var _fieldsArr = [];
-	    var _lastPlaceholder = '';
-	    var _state = '';
-	    var _klass = '';
+	        html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
+	      }
 
+	      html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis
 
-	    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(); });
+	      html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak
 
-	        var container = selection.selectAll('.form-fields-container')
-	            .data([0]);
+	      if (options.buttonText && options.buttonCallback) {
+	        html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
+	      }
 
-	        container = container.enter()
-	            .append('div')
-	            .attr('class', 'form-fields-container ' + (_klass || ''))
-	            .merge(container);
+	      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 (d3_event) {
+	          d3_event.preventDefault();
+	          options.buttonCallback();
+	        });
+	      }
 
-	        var fields = container.selectAll('.wrap-form-field')
-	            .data(shown, function(d) { return d.id + (d.entityIDs ? d.entityIDs.join() : ''); });
+	      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.
 
-	        fields.exit()
-	            .remove();
+	      if (options.tooltipClass === 'intro-mouse') {
+	        tip.height += 80;
+	      } // trim box dimensions to just the portion that fits in the container..
 
-	        // Enter
-	        var enter = fields.enter()
-	            .append('div')
-	            .attr('class', function(d) { return 'wrap-form-field wrap-form-field-' + d.safeid; });
 
-	        // Update
-	        fields = fields
-	            .merge(enter);
+	      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;
+	      } // determine tooltip placement..
 
-	        fields
-	            .order()
-	            .each(function(d) {
-	                select(this)
-	                    .call(d.render);
-	            });
 
+	      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;
 
-	        var titles = [];
-	        var moreFields = notShown.map(function(field) {
-	            var label = field.label();
-	            titles.push(label);
+	        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 terms = field.terms();
-	            if (field.key) { terms.push(field.key); }
-	            if (field.keys) { terms = terms.concat(field.keys); }
+	      if (options.duration !== 0 || !tooltip.classed(side)) {
+	        tooltip.call(uiToggle(true));
+	      }
 
-	            return {
-	                title: label,
-	                value: label,
-	                field: field,
-	                terms: terms
-	            };
-	        });
+	      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)
 
-	        var placeholder = titles.slice(0,3).join(', ') + ((titles.length > 3) ? '…' : '');
+	      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;
+	        }
+	      }
 
-	        var more = selection.selectAll('.more-fields')
-	            .data((_state === 'hover' || moreFields.length === 0) ? [] : [0]);
+	      tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
+	    } else {
+	      tooltip.classed('in', false).call(uiToggle(false));
+	    }
 
-	        more.exit()
-	            .remove();
+	    curtain.cut(box, options.duration);
+	    return tooltip;
+	  };
 
-	        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();
-	                    }
-	                })
-	            );
+	  curtain.cut = function (datum, duration) {
+	    darkness.datum(datum).interrupt();
+	    var selection;
 
-	        // avoid updating placeholder excessively (triggers style recalc)
-	        if (_lastPlaceholder !== placeholder) {
-	            input.attr('placeholder', placeholder);
-	            _lastPlaceholder = placeholder;
-	        }
+	    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';
+	    });
+	  };
 
-	    formFields.fieldsArr = function(val) {
-	        if (!arguments.length) { return _fieldsArr; }
-	        _fieldsArr = val || [];
-	        return formFields;
-	    };
+	  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.
 
-	    formFields.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return formFields;
-	    };
 
-	    formFields.klass = function(val) {
-	        if (!arguments.length) { return _klass; }
-	        _klass = val;
-	        return formFields;
+	  function copyBox(src) {
+	    return {
+	      top: src.top,
+	      right: src.right,
+	      bottom: src.bottom,
+	      left: src.left,
+	      width: src.width,
+	      height: src.height
 	    };
+	  }
 
-
-	    return formFields;
+	  return curtain;
 	}
 
-	function uiSectionPresetFields(context) {
-
-	    var section = uiSection('preset-fields', context)
-	        .title(function() {
-	            return _t('inspector.fields');
-	        })
-	        .disclosureContent(renderDisclosureContent);
-
-	    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) {
+	function uiIntroWelcome(context, reveal) {
+	  var dispatch$1 = dispatch('done');
+	  var chapter = {
+	    title: 'intro.welcome.title'
+	  };
 
-	            var graph = context.graph();
+	  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
+	    });
+	  }
 
-	            var geometries = Object.keys(_entityIDs.reduce(function(geoms, entityID) {
-	                return geoms[graph.entity(entityID).geometry(graph)] = true;
-	            }, {}));
+	  function practice() {
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: words
+	    });
+	  }
 
-	            var presetsManager = _mainPresetIndex;
+	  function words() {
+	    reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: chapters
+	    });
+	  }
 
-	            var allFields = [];
-	            var allMoreFields = [];
-	            var sharedTotalFields;
+	  function chapters() {
+	    dispatch$1.call('done');
+	    reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
+	      next: _t('intro.navigation.title')
+	    }));
+	  }
 
-	            _presets.forEach(function(preset) {
-	                var fields = preset.fields();
-	                var moreFields = preset.moreFields();
+	  chapter.enter = function () {
+	    welcome();
+	  };
 
-	                allFields = utilArrayUnion(allFields, fields);
-	                allMoreFields = utilArrayUnion(allMoreFields, moreFields);
+	  chapter.exit = function () {
+	    context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
+	  };
 
-	                if (!sharedTotalFields) {
-	                    sharedTotalFields = utilArrayUnion(fields, moreFields);
-	                } else {
-	                    sharedTotalFields = sharedTotalFields.filter(function(field) {
-	                        return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
-	                    });
-	                }
-	            });
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	            var sharedFields = allFields.filter(function(field) {
-	                return sharedTotalFields.indexOf(field) !== -1;
-	            });
-	            var sharedMoreFields = allMoreFields.filter(function(field) {
-	                return sharedTotalFields.indexOf(field) !== -1;
-	            });
+	  return utilRebind(chapter, dispatch$1, 'on');
+	}
 
-	            _fieldsArr = [];
+	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'
+	  };
 
-	            sharedFields.forEach(function(field) {
-	                if (field.matchAllGeometry(geometries)) {
-	                    _fieldsArr.push(
-	                        uiField(context, field, _entityIDs)
-	                    );
-	                }
-	            });
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	            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)
-	                );
-	            }
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	            var additionalFields = utilArrayUnion(sharedMoreFields, presetsManager.universal());
-	            additionalFields.sort(function(field1, field2) {
-	                return field1.label().localeCompare(field2.label(), _mainLocalizer.localeCode());
-	            });
+	  function isTownHallSelected() {
+	    var ids = context.selectedIDs();
+	    return ids.length === 1 && ids[0] === hallId;
+	  }
 
-	            additionalFields.forEach(function(field) {
-	                if (sharedFields.indexOf(field) === -1 &&
-	                    field.matchAllGeometry(geometries)) {
-	                    _fieldsArr.push(
-	                        uiField(context, field, _entityIDs, { show: false })
-	                    );
-	                }
-	            });
+	  function dragMap() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(townHall, context.map().center());
 
-	            _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 (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	        _fieldsArr.forEach(function(field) {
-	            field
-	                .state(_state)
-	                .tags(_tags);
+	    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 (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
+	          context.map().on('move.intro', null);
+	          timeout(function () {
+	            continueTo(zoomMap);
+	          }, 3000);
+	        }
+	      });
+	    }, msec + 100);
 
-	        selection
-	            .call(formFields
-	                .fieldsArr(_fieldsArr)
-	                .state(_state)
-	                .klass('grouped-items-area')
-	            );
+	    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);
+	      }
+	    });
 
-	        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));
-	                }
-	            });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    section.presets = function(val) {
-	        if (!arguments.length) { return _presets; }
-	        if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
-	            _presets = val;
-	            _fieldsArr = null;
-	        }
-	        return section;
+	  function features() {
+	    var onClick = function onClick() {
+	      continueTo(pointsLinesAreas);
 	    };
 
-	    section.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return section;
-	    };
+	    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
+	      });
+	    });
 
-	    section.tags = function(val) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = val;
-	        // Don't reset _fieldsArr here.
-	        return section;
-	    };
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
-	            _entityIDs = val;
-	            _fieldsArr = null;
-	        }
-	        return section;
+	  function pointsLinesAreas() {
+	    var onClick = function onClick() {
+	      continueTo(nodesWays);
 	    };
 
-	    return utilRebind(section, dispatch$1, 'on');
-	}
-
-	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';
-	        })
-	        .title(function() {
-	            var entity = context.hasEntity(_entityIDs[0]);
-	            if (!entity) { return ''; }
+	    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
+	      });
+	    });
 
-	            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);
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    var taginfo = services.taginfo;
-	    var _entityIDs;
-	    var _maxMembers = 1000;
+	  function nodesWays() {
+	    var onClick = function onClick() {
+	      continueTo(clickTownHall);
+	    };
 
-	    function downloadMember(d) {
-	        event.preventDefault();
+	    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
+	      });
+	    });
 
-	        // display the loading indicator
-	        select(this.parentNode).classed('tag-reference-loading', true);
-	        context.loadEntity(d.id, function() {
-	            section.reRender();
-	        });
+	    function continueTo(nextStep) {
+	      context.map().on('drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    function zoomToMember(d) {
-	        event.preventDefault();
+	  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 entity = context.entity(d.id);
-	        context.map().zoomToEase(entity);
+	    context.history().on('change.intro', function () {
+	      if (!context.hasEntity(hallId)) {
+	        continueTo(clickTownHall);
+	      }
+	    });
 
-	        // highlight the feature in case it wasn't previously on-screen
-	        utilHighlightEntities([d.id], true, context);
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function selectedTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall();
+	    var entity = context.hasEntity(hallId);
+	    if (!entity) return clickTownHall();
+	    var box = pointBox(entity.loc, context);
 
-	    function selectMember(d) {
-	        event.preventDefault();
-
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.id], false, context);
+	    var onClick = function onClick() {
+	      continueTo(editorTownHall);
+	    };
 
-	        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);
-	        }
+	    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);
+	      }
+	    });
 
-	        context.enter(modeSelect(context, [d.id]));
+	    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
 
-	    function changeRole(d) {
-	        var oldRole = d.role;
-	        var newRole = context.cleanRelationRole(select(this).property('value'));
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	        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')
-	            );
-	        }
-	    }
+	    var onClick = function onClick() {
+	      continueTo(presetTownHall);
+	    };
 
+	    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);
+	      }
+	    });
 
-	    function deleteMember(d) {
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.id], false, context);
+	  function presetTownHall() {
+	    if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
-	        context.perform(
-	            actionDeleteMember(d.relation.id, d.index),
-	            _t('operations.delete_member.annotation')
-	        );
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
-	        if (!context.hasEntity(d.relation.id)) {
-	            context.enter(modeBrowse(context));
-	        }
-	    }
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.
 
-	    function renderDisclosureContent(selection) {
+	    var entity = context.entity(context.selectedIDs()[0]);
+	    var preset = _mainPresetIndex.match(entity, context.graph());
 
-	        var entityID = _entityIDs[0];
+	    var onClick = function onClick() {
+	      continueTo(fieldsTownHall);
+	    };
 
-	        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)
-	            });
-	        });
+	    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);
+	      }
+	    });
 
-	        var list = selection.selectAll('.member-list')
-	            .data([0]);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'member-list')
-	            .merge(list);
+	  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
 
-	        var items = list.selectAll('li')
-	            .data(memberships, function(d) {
-	                return osmEntity.key(d.relation) + ',' + d.index + ',' +
-	                    (d.member ? osmEntity.key(d.member) : 'incomplete');
-	            });
+	    context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-	        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);
-	                }
-	            });
+	    var onClick = function onClick() {
+	      continueTo(closeTownHall);
+	    };
 
-	        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) {
+	    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);
+	      }
+	    });
 
-	                if (!select(this).classed('dragging')) {
-	                    return;
-	                }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      context.container().select('.inspector-wrap').on('wheel.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                select(this)
-	                    .classed('dragging', false);
+	  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
+	      });
+	    });
 
-	                selection.selectAll('li.member-row')
-	                    .style('transform', null);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                if (targetIndex !== null) {
-	                    // dragged to a new position, reorder
-	                    context.perform(
-	                        actionMoveMember(d.relation.id, index, targetIndex),
-	                        _t('operations.reorder_members.annotation')
-	                    );
-	                }
-	            })
-	        );
+	  function searchStreet() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial'); // ensure spring street exists
 
+	    var msec = transitionTime(springStreet, context.map().center());
 
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	        function bindTypeahead(d) {
-	            var row = select(this);
-	            var role = row.selectAll('input.member-role');
-	            var origValue = role.property('value');
+	    context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it
 
-	            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);
-	            }
+	    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);
+	  }
 
-	            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';
-	                    }
+	  function checkSearchResult() {
+	    var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item
 
-	                    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);
-	                })
-	            );
-	        }
+	    var firstName = first.select('.entity-name');
+	    var name = _t('intro.graph.name.spring-street');
 
+	    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);
+	    }
 
-	        function unbind() {
-	            var row = select(this);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            row.selectAll('input.member-role')
-	                .call(uiCombobox.off, context);
-	        }
+	  function selectedStreet() {
+	    if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+	      return searchStreet();
 	    }
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        return section;
+	    var onClick = function onClick() {
+	      continueTo(editorStreet);
 	    };
 
-
-	    return section;
-	}
-
-	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 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
 	        });
-	    var _inChange = false;
-	    var _entityIDs = [];
-	    var _showBlank;
-	    var _maxMemberships = 1000;
+	      });
+	    }, 600); // after reveal.
 
-	    function selectRelation(d) {
-	        event.preventDefault();
+	    context.on('enter.intro', function (mode) {
+	      if (!context.hasEntity(springStreetId)) {
+	        return continueTo(searchStreet);
+	      }
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.relation.id], false, context);
+	      var ids = context.selectedIDs();
 
-	        context.enter(modeSelect(context, [d.relation.id]));
-	    }
+	      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)
+	      }
+	    });
 
-	    function zoomToRelation(d) {
-	        event.preventDefault();
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var entity = context.entity(d.relation.id);
-	        context.map().zoomToEase(entity);
+	  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
+	      });
+	    });
 
-	        // highlight the relation in case it wasn't previously on-screen
-	        utilHighlightEntities([d.relation.id], true, context);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  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 changeRole(d) {
-	        if (d === 0) { return; }    // called on newrow (shoudn't happen)
-	        if (_inChange) { return; }  // avoid accidental recursive call #5731
+	  chapter.enter = function () {
+	    dragMap();
+	  };
 
-	        var oldRole = d.member.role;
-	        var newRole = context.cleanRelationRole(select(this).property('value'));
+	  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);
+	  };
 
-	        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;
-	    }
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
+	  return utilRebind(chapter, dispatch$1, 'on');
+	}
 
-	    function addMembership(d, role) {
-	        this.blur();           // avoid keeping focus on the button
-	        _showBlank = false;
+	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'
+	  };
 
-	        var member = { id: _entityIDs[0], type: context.entity(_entityIDs[0]).type, role: role };
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	        if (d.relation) {
-	            context.perform(
-	                actionAddMember(d.relation.id, member),
-	                _t('operations.add_member.annotation')
-	            );
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	        } else {
-	            var relation = osmRelation();
-	            context.perform(
-	                actionAddEntity(relation),
-	                actionAddMember(relation.id, member),
-	                _t('operations.add.annotation.relation')
-	            );
+	  function addPoint() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    var msec = transitionTime(intersection, context.map().center());
 
-	            context.enter(modeSelect(context, [relation.id]).newFeature(true));
-	        }
+	    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);
 
-	    function deleteMembership(d) {
-	        this.blur();           // avoid keeping focus on the button
-	        if (d === 0) { return; }   // called on newrow (shoudn't happen)
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        // remove the hover-highlight styling
-	        utilHighlightEntities([d.relation.id], false, context);
+	  function placePoint() {
+	    if (context.mode().id !== 'add-point') {
+	      return chapter.restart();
+	    }
 
-	        context.perform(
-	            actionDeleteMember(d.relation.id, d.index),
-	            _t('operations.delete_member.annotation')
-	        );
+	    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);
+	    });
+
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function searchPreset() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    } // disallow scrolling
 
-	    function fetchNearbyRelations(q, callback) {
-	        var newRelation = { relation: null, value: _t('inspector.new_relation') };
 
-	        var entityID = _entityIDs[0];
+	    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);
+	      }
 
-	        var result = [];
+	      var ids = context.selectedIDs();
 
-	        var graph = context.graph();
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
+	        // keep the user's point selected..
+	        context.enter(modeSelect(context, [_pointID])); // disallow scrolling
 
-	        function baseDisplayLabel(entity) {
-	            var matched = _mainPresetIndex.match(entity, graph);
-	            var presetName = (matched && matched.name()) || _t('inspector.relation');
-	            var entityName = utilDisplayName(entity) || '';
+	        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);
+	      }
+	    });
 
-	            return presetName + ' ' + entityName;
-	        }
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	        var explicitRelation = q && context.hasEntity(q.toLowerCase());
-	        if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
-	            // loaded relation is specified explicitly, only show that
+	      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);
+	        });
+	      }
+	    }
 
-	            result.push({
-	                relation: explicitRelation,
-	                value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
-	            });
-	        } else {
+	    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();
+	    }
+	  }
 
-	            context.history().intersects(context.map().extent()).forEach(function(entity) {
-	                if (entity.type !== 'relation' || entity.id === entityID) { return; }
+	  function aboutFeatureEditor() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    }
 
-	                var value = baseDisplayLabel(entity);
-	                if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) { return; }
+	    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);
+	    });
 
-	                result.push({ relation: entity, value: value });
-	            });
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            result.sort(function(a, b) {
-	                return osmRelation.creationOrder(a.relation, b.relation);
-	            });
+	  function addName() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return addPoint();
+	    } // reset pane, in case user happened to change it..
 
-	            // 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;
-	                });
-	            });
-	        }
+	    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);
 
-	        result.forEach(function(obj) {
-	            obj.title = obj.value;
+	      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);
+	    });
 
-	        result.unshift(newRelation);
-	        callback(result);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    function renderDisclosureContent(selection) {
+	  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')
+	    }));
 
-	        var entityID = _entityIDs[0];
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var entity = context.entity(entityID);
-	        var parents = context.graph().parentRelations(entity);
+	  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..
 
-	        var memberships = [];
+	    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());
 
-	        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 (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..
 
-	        var list = selection.selectAll('.member-list')
-	            .data([0]);
+	      context.on('enter.intro', function (mode) {
+	        if (mode.id !== 'select') return;
+	        continueTo(updatePoint);
+	      });
+	    }, msec + 100);
 
-	        list = list.enter()
-	            .append('ul')
-	            .attr('class', 'member-list')
-	            .merge(list);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function updatePoint() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return continueTo(reselectPoint);
+	    } // reset pane, in case user happened to untag the point..
 
-	        var items = list.selectAll('li.member-row-normal')
-	            .data(memberships, function(d) {
-	                return osmEntity.key(d.relation) + ',' + d.index;
-	            });
 
-	        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);
-	            });
+	    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);
 
-	        var labelEnter = itemsEnter
-	            .append('label')
-	            .attr('class', 'field-label')
-	            .attr('for', function(d) {
-	                return d.domId;
-	            });
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        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 updateCloseEditor() {
+	    if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+	      return continueTo(reselectPoint);
+	    } // reset pane, in case user happened to change it..
 
-	        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();
-	            });
 
-	        var newWrapEnter = newMembershipEnter
-	            .append('div')
-	            .attr('class', 'form-field-input-wrap form-field-input-member');
+	    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);
+
+	    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
 
-	        newWrapEnter
-	            .append('input')
-	            .attr('class', 'member-role')
-	            .property('type', 'text')
-	            .attr('placeholder', _t('inspector.role'))
-	            .call(utilNoAuto);
+	    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
+	    });
 
-	        // Update
-	        newMembership = newMembership
-	            .merge(newMembershipEnter);
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        newMembership.selectAll('.member-entity-input')
-	            .on('blur', cancelEntity)   // if it wasn't accepted normally, cancel it
-	            .call(nearbyCombo
-	                .on('accept', acceptEntity)
-	                .on('cancel', cancelEntity)
-	            );
+	  function enterDelete() {
+	    if (!_pointID) return chapter.restart();
+	    var entity = context.hasEntity(_pointID);
+	    if (!entity) return chapter.restart();
+	    var node = selectMenuItem(context, 'delete').node();
 
+	    if (!node) {
+	      return continueTo(rightClickPoint);
+	    }
 
-	        // Container for the Add button
-	        var addRow = selection.selectAll('.add-row')
-	            .data([0]);
+	    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
 
-	        // enter
-	        var addRowEnter = addRow.enter()
-	            .append('div')
-	            .attr('class', 'add-row');
+	    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);
+	      }
+	    });
 
-	        var addRelationButton = addRowEnter
-	            .append('button')
-	            .attr('class', 'add-relation');
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        addRelationButton
-	            .call(svgIcon('#iD-icon-plus', 'light'));
-	        addRelationButton
-	            .call(uiTooltip().title(_t('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
+	  function undo() {
+	    context.history().on('change.intro', function () {
+	      continueTo(play);
+	    });
+	    reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-value');   // preserve space
+	    function continueTo(nextStep) {
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        addRowEnter
-	            .append('div')
-	            .attr('class', 'space-buttons');  // preserve space
+	  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');
+	      }
+	    });
+	  }
 
-	        // update
-	        addRow = addRow
-	            .merge(addRowEnter);
+	  chapter.enter = function () {
+	    addPoint();
+	  };
 
-	        addRow.select('.add-relation')
-	            .on('click', function() {
-	                _showBlank = true;
-	                section.reRender();
-	                list.selectAll('.member-entity-input').node().focus();
-	            });
+	  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);
+	  };
 
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        function acceptEntity(d) {
-	            if (!d) {
-	                cancelEntity();
-	                return;
-	            }
-	            // remove hover-higlighting
-	            if (d.relation) { utilHighlightEntities([d.relation.id], false, context); }
+	  return utilRebind(chapter, dispatch$1, 'on');
+	}
 
-	            var role = context.cleanRelationRole(list.selectAll('.member-row-new .member-role').property('value'));
-	            addMembership(d, role);
-	        }
+	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;
 
-	        function cancelEntity() {
-	            var input = newMembership.selectAll('.member-entity-input');
-	            input.property('value', '');
+	  var chapter = {
+	    title: 'intro.areas.title'
+	  };
 
-	            // remove hover-higlighting
-	            context.surface().selectAll('.highlighted')
-	                .classed('highlighted', false);
-	        }
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	        function bindTypeahead(d) {
-	            var row = select(this);
-	            var role = row.selectAll('input.member-role');
-	            var origValue = role.property('value');
+	  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 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);
-	            }
+	  function addArea() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    _areaID = null;
+	    var msec = transitionTime(playground, context.map().center());
 
-	            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);
-	                })
-	            );
-	        }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
+	    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);
 
-	        function unbind() {
-	            var row = select(this);
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            row.selectAll('input.member-role')
-	                .call(uiCombobox.off, context);
-	        }
+	  function startPlayground() {
+	    if (context.mode().id !== 'add-area') {
+	      return chapter.restart();
 	    }
 
+	    _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
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        _entityIDs = val;
-	        _showBlank = false;
-	        return section;
-	    };
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function continuePlayground() {
+	    if (context.mode().id !== 'draw-area') {
+	      return chapter.restart();
+	    }
 
-	    return section;
-	}
+	    _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
 
-	function uiSectionSelectionList(context) {
+	    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 _selectedIDs = [];
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    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);
+	  function finishPlayground() {
+	    if (context.mode().id !== 'draw-area') {
+	      return chapter.restart();
+	    }
 
-	    context.history()
-	        .on('change.selectionList', function(difference) {
-	            if (difference) {
-	                section.reRender();
-	            }
+	    _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
 
-	    section.entityIDs = function(val) {
-	        if (!arguments.length) { return _selectedIDs; }
-	        _selectedIDs = val;
-	        return section;
-	    };
+	    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 selectEntity(entity) {
-	        context.enter(modeSelect(context, [entity.id]));
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    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));
-	        }
+	  function searchPresets() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
 	    }
 
-	    function renderDisclosureContent(selection) {
+	    var ids = context.selectedIDs();
 
-	        var list = selection.selectAll('.feature-list')
-	            .data([0]);
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      context.enter(modeSelect(context, [_areaID]));
+	    } // disallow scrolling
 
-	        list = list.enter()
-	            .append('div')
-	            .attr('class', 'feature-list')
-	            .merge(list);
 
-	        var entities = _selectedIDs
-	            .map(function(id) { return context.hasEntity(id); })
-	            .filter(Boolean);
+	    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..
 
-	        var items = list.selectAll('.feature-list-item')
-	            .data(entities, osmEntity.key);
+	    context.on('enter.intro', function (mode) {
+	      if (!_areaID || !context.hasEntity(_areaID)) {
+	        return continueTo(addArea);
+	      }
 
-	        items.exit()
-	            .remove();
+	      var ids = context.selectedIDs();
 
-	        // Enter
-	        var enter = items.enter()
-	            .append('div')
-	            .attr('class', 'feature-list-item')
-	            .on('click', selectEntity);
+	      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..
 
-	        enter
-	            .each(function(d) {
-	                select(this).on('mouseover', function() {
-	                    utilHighlightEntities([d.id], true, context);
-	                });
-	                select(this).on('mouseout', function() {
-	                    utilHighlightEntities([d.id], false, context);
-	                });
-	            });
+	        context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
-	        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());
-	            });
+	        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);
+	      }
+	    });
 
-	        items.selectAll('.entity-type')
-	            .text(function(entity) { return _mainPresetIndex.match(entity, context.graph()).name(); });
+	    function checkPresetSearch() {
+	      var first = context.container().select('.preset-list-item:first-child');
 
-	        items.selectAll('.entity-name')
-	            .text(function(d) {
-	                // fetch latest entity
-	                var entity = context.entity(d.id);
-	                return utilDisplayName(entity);
-	            });
+	      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 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;
-
-	    var _sections;
+	    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 entityEditor(selection) {
+	  function clickAddField() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	        var combinedTags = utilCombinedTags(_entityIDs, context.graph());
+	    var ids = context.selectedIDs();
 
-	        // Header
-	        var header = selection.selectAll('.header')
-	            .data([0]);
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    }
 
-	        // Enter
-	        var headerEnter = header.enter()
-	            .append('div')
-	            .attr('class', 'header fillL cf');
+	    if (!context.container().select('.form-field-description').empty()) {
+	      return continueTo(describePlayground);
+	    } // disallow scrolling
 
-	        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'));
+	    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.
 
-	        headerEnter
-	            .append('h3');
+	      var entity = context.entity(_areaID);
 
-	        // Update
-	        header = header
-	            .merge(headerEnter);
+	      if (entity.tags.description) {
+	        return continueTo(play);
+	      } // scroll "Add field" into view
 
-	        header.selectAll('h3')
-	            .text(_entityIDs.length === 1 ? _t('inspector.edit') : _t('inspector.edit_features'));
 
-	        header.selectAll('.preset-reset')
-	            .on('click', function() {
-	                dispatch$1.call('choose', this, _activePresets);
-	            });
+	      var box = context.container().select('.more-fields').node().getBoundingClientRect();
 
-	        // Body
-	        var body = selection.selectAll('.inspector-body')
-	            .data([0]);
+	      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);
+	          };
+	        });
+	      }
 
-	        // 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);
+	      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
 
-	        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();
-	                }
-	            });
+	    context.on('exit.intro', function () {
+	      return continueTo(searchPresets);
+	    });
 
-	        context.history()
-	            .on('change.entity-editor', historyChanged);
+	    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();
+	    }
+	  }
 
-	        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 chooseDescriptionField() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	            _entityIDs = _entityIDs.filter(context.hasEntity);
-	            if (!_entityIDs.length) { return; }
+	    var ids = context.selectedIDs();
 
-	            var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    }
 
-	            loadActivePresets();
+	    if (!context.container().select('.form-field-description').empty()) {
+	      return continueTo(describePlayground);
+	    } // Make sure combobox is ready..
 
-	            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);
-	            }
-	        }
-	    }
+	    if (context.container().select('div.combobox').empty()) {
+	      return continueTo(clickAddField);
+	    } // Watch for the combobox to go away..
 
 
-	    // 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) {
+	    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);
+	    });
 
-	        var actions = [];
-	        for (var i in entityIDs) {
-	            var entityID = entityIDs[i];
-	            var entity = context.entity(entityID);
+	    function continueTo(nextStep) {
+	      if (watcher) window.clearInterval(watcher);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            var tags = Object.assign({}, entity.tags);   // shallow copy
+	  function describePlayground() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	            for (var k in changed) {
-	                if (!k) { continue; }
-	                var v = changed[k];
-	                if (v !== undefined || tags.hasOwnProperty(k)) {
-	                    tags[k] = v;
-	                }
-	            }
+	    var ids = context.selectedIDs();
 
-	            if (!onInput) {
-	                tags = utilCleanTags(tags);
-	            }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    } // reset pane, in case user happened to change it..
 
-	            if (!fastDeepEqual(entity.tags, tags)) {
-	                actions.push(actionChangeTags(entityID, tags));
-	            }
-	        }
 
-	        if (actions.length) {
-	            var combinedAction = function(graph) {
-	                actions.forEach(function(action) {
-	                    graph = action(graph);
-	                });
-	                return graph;
-	            };
+	    context.container().select('.inspector-wrap .panewrap').style('right', '0%');
 
-	            var annotation = _t('operations.change_tags.annotation');
+	    if (context.container().select('.form-field-description').empty()) {
+	      return continueTo(retryChooseDescription);
+	    }
 
-	            if (_coalesceChanges) {
-	                context.overwrite(combinedAction, annotation);
-	            } else {
-	                context.perform(combinedAction, annotation);
-	                _coalesceChanges = !!onInput;
-	            }
-	        }
+	    context.on('exit.intro', function () {
+	      continueTo(play);
+	    });
+	    reveal('.entity-editor-pane', helpHtml('intro.areas.describe_playground', {
+	      button: icon('#iD-icon-close', 'inline')
+	    }), {
+	      duration: 300
+	    });
 
-	        // if leaving field (blur event), rerun validation
-	        if (!onInput) {
-	            context.validator().validate();
-	        }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    function revertTags(keys) {
+	  function retryChooseDescription() {
+	    if (!_areaID || !context.hasEntity(_areaID)) {
+	      return addArea();
+	    }
 
-	        var actions = [];
-	        for (var i in _entityIDs) {
-	            var entityID = _entityIDs[i];
+	    var ids = context.selectedIDs();
 
-	            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;
-	            }
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+	      return searchPresets();
+	    } // reset pane, in case user happened to change it..
 
-	            var entity = context.entity(entityID);
-	            var tags = Object.assign({}, entity.tags);   // shallow copy
 
-	            for (var k in changed) {
-	                if (!k) { continue; }
-	                var v = changed[k];
-	                if (v !== undefined || tags.hasOwnProperty(k)) {
-	                    tags[k] = v;
-	                }
-	            }
+	    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);
+	    });
 
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            tags = utilCleanTags(tags);
+	  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');
+	      }
+	    });
+	  }
 
-	            if (!fastDeepEqual(entity.tags, tags)) {
-	                actions.push(actionChangeTags(entityID, tags));
-	            }
+	  chapter.enter = function () {
+	    addArea();
+	  };
 
-	        }
+	  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);
+	  };
 
-	        if (actions.length) {
-	            var combinedAction = function(graph) {
-	                actions.forEach(function(action) {
-	                    graph = action(graph);
-	                });
-	                return graph;
-	            };
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	            var annotation = _t('operations.change_tags.annotation');
+	  return utilRebind(chapter, dispatch$1, 'on');
+	}
 
-	            if (_coalesceChanges) {
-	                context.overwrite(combinedAction, annotation);
-	            } else {
-	                context.perform(combinedAction, annotation);
-	                _coalesceChanges = false;
-	            }
-	        }
+	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());
 
-	        context.validator().validate();
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
 	    }
 
+	    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);
+	    });
 
-	    entityEditor.modified = function(val) {
-	        if (!arguments.length) { return _modified; }
-	        _modified = val;
-	        return entityEditor;
-	    };
-
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    entityEditor.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        return entityEditor;
-	    };
+	  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..
 
+	    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();
+	      }
+	    });
 
-	    entityEditor.entityIDs = function(val) {
-	        if (!arguments.length) { return _entityIDs; }
-	        if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) { return entityEditor; }  // exit early if no change
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        _entityIDs = val;
-	        _base = context.graph();
-	        _coalesceChanges = false;
+	  function isLineConnected() {
+	    var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-	        loadActivePresets(true);
+	    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;
+	      });
+	    });
+	  }
 
-	        return entityEditor
-	            .modified(false);
-	    };
+	  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);
+	  }
 
+	  function continueLine() {
+	    if (context.mode().id !== 'draw-line') return chapter.restart();
 
-	    entityEditor.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        return entityEditor;
-	    };
+	    var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
+	    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();
+	    });
 
-	    function loadActivePresets(isForNewSelection) {
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var graph = context.graph();
+	  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
 
-	        var counts = {};
+	    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();
+	    }
+	  }
 
-	        for (var i in _entityIDs) {
-	            var entity = graph.hasEntity(_entityIDs[i]);
-	            if (!entity) { return; }
+	  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);
 
-	            var match = _mainPresetIndex.match(entity, graph);
+	    function continueTo(nextStep) {
+	      context.container().select('.preset-list-button').on('click.intro', null);
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  } // selected wrong road type
 
-	            if (!counts[match.id]) { counts[match.id] = 0; }
-	            counts[match.id] += 1;
-	        }
 
-	        var matches = Object.keys(counts).sort(function(p1, p2) {
-	            return counts[p2] - counts[p1];
-	        }).map(function(pID) {
-	            return _mainPresetIndex.item(pID);
-	        });
+	  function retryPresetResidential() {
+	    if (context.mode().id !== 'select') return chapter.restart();
+	    context.on('exit.intro', function () {
+	      return chapter.restart();
+	    }); // disallow scrolling
 
-	        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")
-	            if (weakPreset && matches.length === 1 && matches[0].isFallback()) { return; }
-	        }
+	    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);
 
-	        entityEditor.presets(matches);
+	    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();
 	    }
+	  }
+
+	  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);
 
-	    entityEditor.presets = function(val) {
-	        if (!arguments.length) { return _activePresets; }
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        // don't reload the same preset
-	        if (!utilArrayIdentical(val, _activePresets)) {
-	            _activePresets = val;
+	  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);
 	        }
-	        return entityEditor;
-	    };
+	      });
+	    }, 500);
 
-	    return utilRebind(entityEditor, dispatch$1, 'on');
-	}
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
-	function uiPresetList(context) {
-	    var dispatch$1 = dispatch('cancel', 'choose');
-	    var _entityIDs;
-	    var _currentPresets;
-	    var _autofocus = false;
+	  function updateLine() {
+	    context.history().reset('doneAddLine');
+
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return chapter.restart();
+	    }
 
+	    var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
 
-	    function presetList(selection) {
-	        if (!_entityIDs) { return; }
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	        var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
+	    context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
+	    timeout(function () {
+	      var padding = 250 * Math.pow(2, context.map().zoom() - 19);
+	      var box = pad(woodRoadDragMidpoint, padding, context);
 
-	        selection.html('');
+	      var advance = function advance() {
+	        continueTo(addNode);
+	      };
 
-	        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);
-	            }
-	        }
+	      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 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 continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        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); });
-	            }
-	        }
+	  function addNode() {
+	    context.history().reset('doneAddLine');
 
-	        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);
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return chapter.restart();
+	    }
 
-	                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);
-	        }
+	    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);
+	      }
 
-	        var searchWrap = selection
-	            .append('div')
-	            .attr('class', 'search-header');
+	      if (changed.created().length === 1) {
+	        timeout(function () {
+	          continueTo(startDragEndpoint);
+	        }, 500);
+	      }
+	    });
+	    context.on('enter.intro', function (mode) {
+	      if (mode.id !== 'select') {
+	        continueTo(updateLine);
+	      }
+	    });
 
-	        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 continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        searchWrap
-	            .call(svgIcon('#iD-icon-search', 'pre-text'));
+	  function startDragEndpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	        if (_autofocus) {
-	            search.node().focus();
-	        }
+	    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);
+	      }
 
-	        var listWrap = selection
-	            .append('div')
-	            .attr('class', 'inspector-body');
+	      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);
 
-	        var list = listWrap
-	            .append('div')
-	            .attr('class', 'preset-list')
-	            .call(drawList, _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro()));
+	      if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
+	        continueTo(finishDragEndpoint);
+	      }
+	    });
 
-	        context.features().on('change.preset-list', updateForFeatureHiddenState);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function finishDragEndpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	    function drawList(list, presets) {
-	        presets = presets.matchAllGeometry(entityGeometries());
-	        var collection = presets.collection.reduce(function(collection, preset) {
-	            if (!preset) { return collection; }
+	    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);
+	      }
 
-	            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;
-	        }, []);
+	      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);
 
-	        var items = list.selectAll('.preset-list-item')
-	            .data(collection, function(d) { return d.preset.id; });
+	      if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
+	        continueTo(startDragEndpoint);
+	      }
+	    });
+	    context.on('enter.intro', function () {
+	      continueTo(startDragMidpoint);
+	    });
 
-	        items.order();
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        items.exit()
-	            .remove();
+	  function startDragMidpoint() {
+	    if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+	      return continueTo(updateLine);
+	    }
 
-	        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();
-	            }
+	    if (context.selectedIDs().indexOf(woodRoadID) === -1) {
+	      context.enter(modeSelect(context, [woodRoadID]));
+	    }
 
-	        // 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');
-	            }
+	    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);
+	      }
 
-	            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();
-	            }
+	      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]));
+	      }
+	    });
 
-	        // 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 continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        // 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());
-	        }
+	  function continueDragMidpoint() {
+	    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;
 
-	    function CategoryItem(preset) {
-	        var box, sublist, shown = false;
+	    var advance = function advance() {
+	      context.history().checkpoint('doneUpdateLine');
+	      continueTo(deleteLines);
+	    };
 
-	        function item(selection) {
-	            var wrap = selection.append('div')
-	                .attr('class', 'preset-list-button-wrap category');
+	    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);
+	      }
 
-	            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();
-	            }
+	      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
+	      });
+	    });
 
-	            var geometries = entityGeometries();
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.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 deleteLines() {
+	    context.history().reset('doneUpdateLine');
+	    context.enter(modeBrowse(context));
 
-	            var label = button
-	                .append('div')
-	                .attr('class', 'label')
-	                .append('div')
-	                .attr('class', 'label-inner');
+	    if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return chapter.restart();
+	    }
 
-	            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;'; });
+	    var msec = transitionTime(deleteLinesLoc, context.map().center());
 
-	            box = selection.append('div')
-	                .attr('class', 'subgrid')
-	                .style('max-height', '0px')
-	                .style('opacity', 0);
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	            box.append('div')
-	                .attr('class', 'arrow');
+	    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;
 
-	            sublist = box.append('div')
-	                .attr('class', 'preset-list fillL3');
-	        }
+	      var advance = function advance() {
+	        continueTo(rightClickIntersection);
+	      };
 
+	      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);
 
-	        item.choose = function() {
-	            if (!box || !sublist) { return; }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            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');
-	            }
-	        };
+	  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);
 
-	        item.preset = preset;
-	        return item;
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function splitIntersection() {
+	    if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(deleteLines);
+	    }
 
-	    function PresetItem(preset) {
-	        function item(selection) {
-	            var wrap = selection.append('div')
-	                .attr('class', 'preset-list-button-wrap');
-
-	            var geometries = entityGeometries();
+	    var node = selectMenuItem(context, 'split').node();
 
-	            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);
+	    if (!node) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	            var label = button
-	                .append('div')
-	                .attr('class', 'label')
-	                .append('div')
-	                .attr('class', 'label-inner');
+	    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();
 
-	            // 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; });
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickIntersection);
+	      }
 
-	            wrap.call(item.reference.button);
-	            selection.call(item.reference.body);
+	      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)
+	    });
 
-	        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.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            context.validator().validate();  // rerun validation
-	            dispatch$1.call('choose', this, preset);
-	        };
+	  function retrySplit() {
+	    context.enter(modeBrowse(context));
+	    context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
 
-	        item.help = function() {
-	            event.stopPropagation();
-	            item.reference.toggle();
-	        };
+	    var advance = function advance() {
+	      continueTo(rightClickIntersection);
+	    };
 
-	        item.preset = preset;
-	        item.reference = uiTagReference(preset.reference(entityGeometries()[0]));
+	    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
+	      });
+	    });
 
-	        return item;
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
 	    }
+	  }
 
+	  function didSplit() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	    function updateForFeatureHiddenState() {
-	        if (!_entityIDs.every(context.hasEntity)) { return; }
+	    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
 
-	        var geometries = entityGeometries();
-	        var button = context.container().selectAll('.preset-list .preset-list-button');
+	    context.on('enter.intro', function () {
+	      var ids = context.selectedIDs();
 
-	        // remove existing tooltips
-	        button.call(uiTooltip().destroyAny);
+	      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);
+	      }
+	    });
 
-	        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')
-	                );
-	            }
-	        });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    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;
-	    };
-
-	    presetList.presets = function(val) {
-	        if (!arguments.length) { return _currentPresets; }
-	        _currentPresets = val;
-	        return presetList;
-	    };
+	  function multiSelect() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	    function entityGeometries() {
+	    var ids = context.selectedIDs();
+	    var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
+	    var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
 
-	        var counts = {};
+	    if (hasWashington && hasTwelfth) {
+	      return continueTo(multiRightClick);
+	    } else if (!hasWashington && !hasTwelfth) {
+	      return continueTo(didSplit);
+	    }
 
-	        for (var i in _entityIDs) {
-	            var entityID = _entityIDs[i];
-	            var entity = context.entity(entityID);
-	            var geometry = entity.geometry(context.graph());
+	    context.map().centerZoomEase(twelfthAvenue, 18, 500);
+	    timeout(function () {
+	      var selected, other, padding, box;
 
-	            // Treat entities on addr:interpolation lines as points, not vertices (#3241)
-	            if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
-	                geometry = 'point';
-	            }
+	      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 (!counts[geometry]) { counts[geometry] = 0; }
-	            counts[geometry] += 1;
+	      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);
 
-	        return Object.keys(counts).sort(function(geom1, geom2) {
-	            return counts[geom2] - counts[geom1];
-	        });
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    function combinedEntityExtent() {
-	        return _entityIDs.reduce(function(extent, entityID) {
-	            var entity = context.graph().entity(entityID);
-	            return extent.extend(entity.extent(context.graph()));
-	        }, geoExtent());
+	  function multiRightClick() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
 	    }
 
-	    return utilRebind(presetList, dispatch$1, 'on');
-	}
+	    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();
 
-	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);
-	            });
+	        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);
+	      }
+	    });
 
-	        entityEditor
-	            .state(_state)
-	            .entityIDs(_entityIDs)
-	            .on('choose', inspector.showList);
+	    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();
+	    }
+	  }
 
-	        wrap = selection.selectAll('.panewrap')
-	            .data([0]);
+	  function multiDelete() {
+	    if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+	      return continueTo(rightClickIntersection);
+	    }
 
-	        var enter = wrap.enter()
-	            .append('div')
-	            .attr('class', 'panewrap');
+	    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);
+	      }
+	    });
 
-	        enter
-	            .append('div')
-	            .attr('class', 'preset-list-pane pane');
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('exit.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        enter
-	            .append('div')
-	            .attr('class', 'entity-editor-pane pane');
+	  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);
+	      }
+	    });
 
-	        wrap = wrap.merge(enter);
-	        presetPane = wrap.selectAll('.preset-list-pane');
-	        editorPane = wrap.selectAll('.entity-editor-pane');
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
-	        function shouldDefaultToPresetList() {
-	            // always show the inspector on hover
-	            if (_state !== 'select') { return false; }
+	  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');
+	      }
+	    });
+	  }
 
-	            // can only change preset on single selection
-	            if (_entityIDs.length !== 1) { return false; }
+	  chapter.enter = function () {
+	    addLine();
+	  };
 
-	            var entityID = _entityIDs[0];
-	            var entity = context.hasEntity(entityID);
-	            if (!entity) { return false; }
+	  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);
+	  };
 
-	            // default to inspector if there are already tags
-	            if (entity.hasNonGeometryTags()) { return false; }
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	            // prompt to select preset if feature is new and untagged
-	            if (_newFeature) { return true; }
+	  return utilRebind(chapter, dispatch$1, 'on');
+	}
 
-	            // all existing features except vertices should default to inspector
-	            if (entity.geometry(context.graph()) !== 'vertex') { return false; }
+	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'
+	  };
 
-	            // show vertex relations if any
-	            if (context.graph().parentRelations(entity).length) { return false; }
+	  function timeout(f, t) {
+	    timeouts.push(window.setTimeout(f, t));
+	  }
 
-	            // show vertex issues if there are any
-	            if (context.validator().getEntityIssues(entityID).length) { return false; }
+	  function eventCancel(d3_event) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	  }
 
-	            // show turn retriction editor for junction vertices
-	            if (entity.isHighwayIntersection(context.graph())) { return false; }
+	  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);
+	  }
 
-	            // otherwise show preset list for uninteresting vertices
-	            return true;
-	        }
+	  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);
+	  }
 
-	        if (shouldDefaultToPresetList()) {
-	            wrap.style('right', '-100%');
-	            presetPane.call(presetList);
-	        } else {
-	            wrap.style('right', '0%');
-	            editorPane.call(entityEditor);
-	        }
+	  function addHouse() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('initial');
+	    _houseID = null;
+	    var msec = transitionTime(house, context.map().center());
 
-	        var footer = selection.selectAll('.footer')
-	            .data([0]);
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	        footer = footer.enter()
-	            .append('div')
-	            .attr('class', 'footer')
-	            .merge(footer);
+	    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);
 
-	        footer
-	            .call(uiViewOnOSM(context)
-	                .what(context.hasEntity(_entityIDs.length === 1 && _entityIDs[0]))
-	            );
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
 	    }
+	  }
 
-	    inspector.showList = function(presets) {
-
-	        wrap.transition()
-	            .styleTween('right', function() { return interpolate('0%', '-100%'); });
+	  function startHouse() {
+	    if (context.mode().id !== 'add-area') {
+	      return continueTo(addHouse);
+	    }
 
-	        if (presets) {
-	            presetList.presets(presets);
-	        }
+	    _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
 
-	        presetPane
-	            .call(presetList.autofocus(true));
-	    };
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    inspector.setPreset = function(preset) {
+	  function continueHouse() {
+	    if (context.mode().id !== 'draw-area') {
+	      return continueTo(addHouse);
+	    }
 
-	        // upon setting multipolygon, go to the area preset list instead of the editor
-	        if (preset.id === 'type/multipolygon') {
-	            presetPane
-	                .call(presetList.autofocus(true));
+	    _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);
+	        });
 
+	        if (isMostlySquare(points)) {
+	          _houseID = way.id;
+	          return continueTo(chooseCategoryBuilding);
 	        } else {
-	            wrap.transition()
-	                .styleTween('right', function() { return interpolate('-100%', '0%'); });
-
-	            editorPane
-	                .call(entityEditor.presets([preset]));
+	          return continueTo(retryHouse);
 	        }
+	      } else {
+	        return chapter.restart();
+	      }
+	    });
 
-	    };
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	    inspector.state = function(val) {
-	        if (!arguments.length) { return _state; }
-	        _state = val;
-	        entityEditor.state(_state);
+	  function retryHouse() {
+	    var onClick = function onClick() {
+	      continueTo(addHouse);
+	    };
 
-	        // remove any old field help overlay that might have gotten attached to the inspector
-	        context.container().selectAll('.field-help-body').remove();
+	    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
+	      });
+	    });
 
-	        return inspector;
-	    };
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function chooseCategoryBuilding() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
+	    }
 
-	    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] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    } // disallow scrolling
 
-	    inspector.newFeature = function(val) {
-	        if (!arguments.length) { return _newFeature; }
-	        _newFeature = val;
-	        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', '-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..
 
-	    return inspector;
-	}
+	    context.on('enter.intro', function (mode) {
+	      if (!_houseID || !context.hasEntity(_houseID)) {
+	        return continueTo(addHouse);
+	      }
 
-	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 ids = context.selectedIDs();
 
-	        var downPointerId, lastClientX, containerLocGetter;
+	      if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	        return continueTo(chooseCategoryBuilding);
+	      }
+	    });
 
-	        function pointerdown() {
-	            if (downPointerId) { return; }
+	    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();
+	    }
+	  }
 
-	            if ('button' in event && event.button !== 0) { return; }
+	  function choosePresetHouse() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
+	    }
 
-	            downPointerId = event.pointerId || 'mouse';
+	    var ids = context.selectedIDs();
 
-	            lastClientX = event.clientX;
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    } // disallow scrolling
 
-	            containerLocGetter = utilFastMouse(container.node());
 
-	            // offset from edge of sidebar-resizer
-	            dragOffset = utilFastMouse(resizer.node())(event)[0] - 1;
+	    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..
 
-	            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
+	    context.on('enter.intro', function (mode) {
+	      if (!_houseID || !context.hasEntity(_houseID)) {
+	        return continueTo(addHouse);
+	      }
 
-	            resizer.classed('dragging', true);
+	      var ids = context.selectedIDs();
 
-	            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 (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	        return continueTo(chooseCategoryBuilding);
+	      }
+	    });
 
-	        function pointermove() {
+	    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();
+	    }
+	  }
 
-	            if (downPointerId !== (event.pointerId || 'mouse')) { return; }
+	  function closeEditorHouse() {
+	    if (!_houseID || !context.hasEntity(_houseID)) {
+	      return addHouse();
+	    }
 
-	            event.preventDefault();
+	    var ids = context.selectedIDs();
 
-	            var dx = event.clientX - lastClientX;
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+	      context.enter(modeSelect(context, [_houseID]));
+	    }
 
-	            lastClientX = event.clientX;
+	    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);
 
-	            var isRTL = (_mainLocalizer.textDirection() === 'rtl');
-	            var scaleX = isRTL ? 0 : 1;
-	            var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            var x = containerLocGetter(event)[0] - dragOffset;
-	            sidebarWidth = isRTL ? containerWidth - x : x;
+	  function rightClickHouse() {
+	    if (!_houseID) return chapter.restart();
+	    context.enter(modeBrowse(context));
+	    context.history().reset('hasHouse');
+	    var zoom = context.map().zoom();
 
-	            var isCollapsed = selection.classed('collapsed');
-	            var shouldCollapse = sidebarWidth < minWidth;
+	    if (zoom < 20) {
+	      zoom = 20;
+	    }
 
-	            selection.classed('collapsed', shouldCollapse);
+	    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);
+	    });
 
-	            if (shouldCollapse) {
-	                if (!isCollapsed) {
-	                    selection
-	                        .style(xMarginProperty, '-400px')
-	                        .style('width', '400px');
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                    context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);
-	                }
+	  function clickSquare() {
+	    if (!_houseID) return chapter.restart();
+	    var entity = context.hasEntity(_houseID);
+	    if (!entity) return continueTo(rightClickHouse);
+	    var node = selectMenuItem(context, 'orthogonalize').node();
 
-	            } 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]);
-	                }
-	            }
-	        }
+	    if (!node) {
+	      return continueTo(rightClickHouse);
+	    }
 
-	        function pointerup() {
-	            if (downPointerId !== (event.pointerId || 'mouse')) { return; }
+	    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();
 
-	            downPointerId = null;
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickHouse);
+	      }
 
-	            resizer.classed('dragging', false);
+	      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.
 
-	            select(window)
-	                .on('touchmove.sidebar-resizer', null)
-	                .on(_pointerPrefix + 'move.sidebar-resizer', null)
-	                .on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', null);
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
+	          n: 1
+	        })) {
+	          continueTo(doneSquare);
+	        } else {
+	          continueTo(retryClickSquare);
 	        }
+	      }, 500); // after transitioned actions
+	    });
 
-	        var featureListWrap = selection
-	            .append('div')
-	            .attr('class', 'feature-list-pane')
-	            .call(uiFeatureList(context));
-
-	        var inspectorWrap = selection
-	            .append('div')
-	            .attr('class', 'inspector-hidden inspector-wrap');
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	        var hoverModeSelect = function(targets) {
-	            context.container().selectAll('.feature-list-item').classed('hover', false);
+	  function retryClickSquare() {
+	    context.enter(modeBrowse(context));
+	    revealHouse(house, helpHtml('intro.buildings.retry_square'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(rightClickHouse);
+	      }
+	    });
 
-	            if (context.selectedIDs().length > 1 &&
-	                targets && targets.length) {
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
-	                var elements = context.container().selectAll('.feature-list-item')
-	                    .filter(function (node) {
-	                        return targets.indexOf(node) !== -1;
-	                    });
+	  function doneSquare() {
+	    context.history().checkpoint('doneSquare');
+	    revealHouse(house, helpHtml('intro.buildings.done_square'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(addTank);
+	      }
+	    });
 
-	                if (!elements.empty()) {
-	                    elements.classed('hover', true);
-	                }
-	            }
-	        };
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
-	        sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
+	  function addTank() {
+	    context.enter(modeBrowse(context));
+	    context.history().reset('doneSquare');
+	    _tankID = null;
+	    var msec = transitionTime(tank, context.map().center());
 
-	        function hover(targets) {
-	            var datum = targets && targets.length && targets[0];
-	            if (datum && datum.__featurehash__) {   // hovering on data
-	                _wasData = true;
-	                sidebar
-	                    .show(dataEditor.datum(datum));
+	    if (msec) {
+	      reveal(null, null, {
+	        duration: 0
+	      });
+	    }
 
-	                selection.selectAll('.sidebar-component')
-	                    .classed('inspector-hover', true);
+	    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);
 
-	            } else if (datum instanceof osmNote) {
-	                if (context.mode().id === 'drag-note') { return; }
-	                _wasNote = true;
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                var osm = services.osm;
-	                if (osm) {
-	                    datum = osm.getNote(datum.id);   // marker may contain stale data - get latest
-	                }
+	  function startTank() {
+	    if (context.mode().id !== 'add-area') {
+	      return continueTo(addTank);
+	    }
 
-	                sidebar
-	                    .show(noteEditor.note(datum));
+	    _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
 
-	                selection.selectAll('.sidebar-component')
-	                    .classed('inspector-hover', true);
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            } else if (datum instanceof QAItem) {
-	                _wasQaItem = true;
+	  function continueTank() {
+	    if (context.mode().id !== 'draw-area') {
+	      return continueTo(addTank);
+	    }
 
-	                var errService = services[datum.service];
-	                if (errService) {
-	                    // marker may contain stale data - get latest
-	                    datum = errService.getError(datum.id);
-	                }
+	    _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);
+	      }
+	    });
 
-	                // Currently only three possible services
-	                var errEditor;
-	                if (datum.service === 'keepRight') {
-	                    errEditor = keepRightEditor;
-	                } else if (datum.service === 'osmose') {
-	                    errEditor = osmoseEditor;
-	                } else {
-	                    errEditor = improveOsmEditor;
-	                }
+	    function continueTo(nextStep) {
+	      context.map().on('move.intro drawn.intro', null);
+	      context.on('enter.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                context.container().selectAll('.qaItem.' + datum.service)
-	                    .classed('hover', function(d) { return d.id === datum.id; });
+	  function searchPresetTank() {
+	    if (!_tankID || !context.hasEntity(_tankID)) {
+	      return addTank();
+	    }
 
-	                sidebar
-	                    .show(errEditor.error(datum));
+	    var ids = context.selectedIDs();
 
-	                selection.selectAll('.sidebar-component')
-	                    .classed('inspector-hover', true);
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	      context.enter(modeSelect(context, [_tankID]));
+	    } // disallow scrolling
 
-	            } else if (!_current && (datum instanceof osmEntity)) {
-	                featureListWrap
-	                    .classed('inspector-hidden', true);
 
-	                inspectorWrap
-	                    .classed('inspector-hidden', false)
-	                    .classed('inspector-hover', 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.buildings.search_tank', {
+	        preset: tankPreset.name()
+	      }));
+	    }, 400); // after preset list pane visible..
 
-	                if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
-	                    inspector
-	                        .state('hover')
-	                        .entityIDs([datum.id])
-	                        .newFeature(false);
+	    context.on('enter.intro', function (mode) {
+	      if (!_tankID || !context.hasEntity(_tankID)) {
+	        return continueTo(addTank);
+	      }
 
-	                    inspectorWrap
-	                        .call(inspector);
-	                }
+	      var ids = context.selectedIDs();
 
-	            } 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();
-	            }
-	        }
+	      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..
 
-	        sidebar.hover = throttle(hover, 200);
+	        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.buildings.search_tank', {
+	          preset: tankPreset.name()
+	        }));
+	        context.history().on('change.intro', null);
+	      }
+	    });
 
-	        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 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(), 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);
+	        });
+	      }
+	    }
 
-	        sidebar.select = function(ids, newFeature) {
-	            sidebar.hide();
+	    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();
+	    }
+	  }
 
-	            if (ids && ids.length) {
+	  function closeEditorTank() {
+	    if (!_tankID || !context.hasEntity(_tankID)) {
+	      return addTank();
+	    }
 
-	                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));
-	                }
+	    var ids = context.selectedIDs();
 
-	                featureListWrap
-	                    .classed('inspector-hidden', true);
+	    if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+	      context.enter(modeSelect(context, [_tankID]));
+	    }
 
-	                inspectorWrap
-	                    .classed('inspector-hidden', false)
-	                    .classed('inspector-hover', false);
+	    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);
 
-	                if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), ids) || inspector.state() !== 'select') {
-	                    inspector
-	                        .state('select')
-	                        .entityIDs(ids)
-	                        .newFeature(newFeature);
+	    function continueTo(nextStep) {
+	      context.on('exit.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	                    inspectorWrap
-	                        .call(inspector);
-	                }
+	  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);
 
-	            } else {
-	                inspector
-	                    .state('hide');
-	            }
-	        };
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro drawn.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
+	  function clickCircle() {
+	    if (!_tankID) return chapter.restart();
+	    var entity = context.hasEntity(_tankID);
+	    if (!entity) return continueTo(rightClickTank);
+	    var node = selectMenuItem(context, 'circularize').node();
 
-	        sidebar.showPresetList = function() {
-	            inspector.showList();
-	        };
+	    if (!node) {
+	      return continueTo(rightClickTank);
+	    }
 
+	    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();
 
-	        sidebar.show = function(component, element) {
-	            featureListWrap
-	                .classed('inspector-hidden', true);
-	            inspectorWrap
-	                .classed('inspector-hidden', true);
+	      if (!wasChanged && !node) {
+	        return continueTo(rightClickTank);
+	      }
 
-	            if (_current) { _current.remove(); }
-	            _current = selection
-	                .append('div')
-	                .attr('class', 'sidebar-component')
-	                .call(component, element);
-	        };
+	      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.
 
+	      timeout(function () {
+	        if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
+	          n: 1
+	        })) {
+	          continueTo(play);
+	        } else {
+	          continueTo(retryClickCircle);
+	        }
+	      }, 500); // after transitioned actions
+	    });
 
-	        sidebar.hide = function() {
-	            featureListWrap
-	                .classed('inspector-hidden', false);
-	            inspectorWrap
-	                .classed('inspector-hidden', true);
+	    function continueTo(nextStep) {
+	      context.on('enter.intro', null);
+	      context.map().on('move.intro', null);
+	      context.history().on('change.intro', null);
+	      nextStep();
+	    }
+	  }
 
-	            if (_current) { _current.remove(); }
-	            _current = null;
-	        };
+	  function retryClickCircle() {
+	    context.enter(modeBrowse(context));
+	    revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        continueTo(rightClickTank);
+	      }
+	    });
 
+	    function continueTo(nextStep) {
+	      nextStep();
+	    }
+	  }
 
-	        sidebar.expand = function(moveMap) {
-	            if (selection.classed('collapsed')) {
-	                sidebar.toggle(moveMap);
-	            }
-	        };
+	  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');
+	      }
+	    });
+	  }
 
+	  chapter.enter = function () {
+	    addHouse();
+	  };
 
-	        sidebar.collapse = function(moveMap) {
-	            if (!selection.classed('collapsed')) {
-	                sidebar.toggle(moveMap);
-	            }
-	        };
+	  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);
+	  };
 
+	  chapter.restart = function () {
+	    chapter.exit();
+	    chapter.enter();
+	  };
 
-	        sidebar.toggle = function(moveMap) {
-	            var e = event;
-	            if (e && e.sourceEvent) {
-	                e.sourceEvent.preventDefault();
-	            } else if (e) {
-	                e.preventDefault();
-	            }
+	  return utilRebind(chapter, dispatch$1, 'on');
+	}
 
-	            // Don't allow sidebar to toggle when the user is in the walkthrough.
-	            if (context.inIntro()) { return; }
+	function uiIntroStartEditing(context, reveal) {
+	  var dispatch$1 = dispatch('done', 'startEditing');
+	  var modalSelection = select(null);
+	  var chapter = {
+	    title: 'intro.startediting.title'
+	  };
 
-	            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 showHelp() {
+	    reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        shortcuts();
+	      }
+	    });
+	  }
 
-	            sidebarWidth = selection.node().getBoundingClientRect().width;
+	  function shortcuts() {
+	    reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        showSave();
+	      }
+	    });
+	  }
 
-	            // switch from % to px
-	            selection.style('width', sidebarWidth + 'px');
+	  function showSave() {
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-	            var startMargin, endMargin, lastMargin;
-	            if (isCollapsing) {
-	                startMargin = lastMargin = 0;
-	                endMargin = -sidebarWidth;
-	            } else {
-	                startMargin = lastMargin = -sidebarWidth;
-	                endMargin = 0;
-	            }
+	    reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
+	      buttonText: _t.html('intro.ok'),
+	      buttonCallback: function buttonCallback() {
+	        showStart();
+	      }
+	    });
+	  }
 
-	            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 + '%');
-	                    }
-	                });
-	        };
+	  function showStart() {
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-	        // toggle the sidebar collapse when double-clicking the resizer
-	        resizer.on('dblclick', sidebar.toggle);
+	    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');
+	  }
 
-	        // 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([]);
-	            }
-	        });
-	    }
+	  chapter.enter = function () {
+	    showHelp();
+	  };
 
-	    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() {};
+	  chapter.exit = function () {
+	    modalSelection.remove();
+	    context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+	  };
 
-	    return sidebar;
+	  return utilRebind(chapter, dispatch$1, 'on');
 	}
 
-	function uiSourceSwitch(context) {
-	    var keys;
-
+	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 = {};
 
-	    function click() {
-	        event.preventDefault();
+	  var _currChapter;
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
+	  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]));
+	        }
+	      }
 
-	        if (context.inIntro()) { return; }
+	      selection.call(startIntro);
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  }
 
-	        if (context.history().hasChanges() &&
-	            !window.confirm(_t('source_switch.lose_changes'))) { return; }
+	  function startIntro(selection) {
+	    context.enter(modeBrowse(context)); // Save current map state
 
-	        var isLive = select(this)
-	            .classed('live');
+	    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)`)
 
-	        isLive = !isLive;
-	        context.enter(modeBrowse(context));
-	        context.history().clearSaved();          // remove saved history
-	        context.flush();                         // remove stored data
+	    context.ui().sidebar.expand();
+	    context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving
 
-	        select(this)
-	            .text(isLive ? _t('source_switch.live') : _t('source_switch.dev'))
-	            .classed('live', isLive)
-	            .classed('chip', isLive);
+	    context.inIntro(true); // Load semi-real data used in intro
 
-	        osm.switch(isLive ? keys[0] : keys[1]);  // switch connection (warning: dispatches 'change' event)
+	    if (osm) {
+	      osm.toggle(false).reset();
 	    }
 
-	    var sourceSwitch = function(selection) {
-	        selection
-	            .append('a')
-	            .attr('href', '#')
-	            .text(_t('source_switch.live'))
-	            .attr('class', 'live chip')
-	            .on('click', click);
-	    };
+	    context.history().reset();
+	    context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
+	    context.history().checkpoint('initial'); // Setup imagery
 
+	    var imagery = context.background().findSource(INTRO_IMAGERY);
 
-	    sourceSwitch.keys = function(_) {
-	        if (!arguments.length) { return keys; }
-	        keys = _;
-	        return sourceSwitch;
-	    };
+	    if (imagery) {
+	      context.background().baseLayerSource(imagery);
+	    } else {
+	      context.background().bing();
+	    }
 
+	    overlays.forEach(function (d) {
+	      return context.background().toggleOverlayLayer(d);
+	    }); // Setup data layers (only OSM)
 
-	    return sourceSwitch;
-	}
+	    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..
 
-	function uiSpinner(context) {
-	    var osm = context.connection();
+	    corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..
+
+	    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);
 
+	        if (i < chapterFlow.length - 1) {
+	          var next = chapterFlow[i + 1];
+	          context.container().select("button.chapter-".concat(next)).classed('next', true);
+	        } // Store walkthrough progress..
 
-	    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);
-	                });
-	        }
-	    };
-	}
+	        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);
 
-	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 (!incomplete.length) {
+	        corePreferences('walkthrough_completed', 'yes');
+	      }
 
-	    // 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;
-	    }
+	      curtain.remove();
+	      navwrap.remove();
+	      context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
+	      context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
 
-	    if (!showSplash) { return; }
+	      if (osm) {
+	        osm.toggle(true).reset().caches(caches);
+	      }
 
-	    corePreferences('sawSplash', true);
-	    corePreferences('sawPrivacyVersion', context.privacyVersion);
+	      context.history().reset().merge(Object.values(baseEntities));
+	      context.background().baseLayerSource(background);
+	      overlays.forEach(function (d) {
+	        return context.background().toggleOverlayLayer(d);
+	      });
 
-	    // fetch intro graph data now, while user is looking at the splash screen
-	    _mainFileFetcher.get('intro_graph');
+	      if (history) {
+	        context.history().fromJSON(history, false);
+	      }
 
-	    var modalSelection = uiModal(selection);
+	      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]);
 
-	    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 enterChapter(d3_event, newChapter) {
+	      if (_currChapter) {
+	        _currChapter.exit();
+	      }
 
-	    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>'
-	      }));
+	      context.enter(modeBrowse(context));
+	      _currChapter = newChapter;
 
-	    var buttonWrap = introModal
-	      .append('div')
-	      .attr('class', 'modal-actions');
+	      _currChapter.enter();
 
-	    var walkthrough = buttonWrap
-	      .append('button')
-	      .attr('class', 'walkthrough')
-	      .on('click', function () {
-	        context.container().call(uiIntro(context));
-	        modalSelection.close();
+	      buttons.classed('next', false).classed('active', function (d) {
+	        return d.title === _currChapter.title;
 	      });
+	    }
+	  }
 
-	    walkthrough
-	      .append('svg')
-	      .attr('class', 'logo logo-walkthrough')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-walkthrough');
+	  return intro;
+	}
+
+	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'
+	    });
 
-	    walkthrough
-	      .append('div')
-	      .text(_t('splash.walkthrough'));
+	    if (liveIssues.length) {
+	      warningsItem.count = liveIssues.length;
+	      shownItems.push(warningsItem);
+	    }
 
-	    var startEditing = buttonWrap
-	      .append('button')
-	      .attr('class', 'start-editing')
-	      .on('click', modalSelection.close);
+	    if (corePreferences('validate-what') === 'all') {
+	      var resolvedIssues = context.validator().getResolvedIssues();
 
-	    startEditing
-	      .append('svg')
-	      .attr('class', 'logo logo-features')
-	      .append('use')
-	      .attr('xlink:href', '#iD-logo-features');
+	      if (resolvedIssues.length) {
+	        resolvedItem.count = resolvedIssues.length;
+	        shownItems.push(resolvedItem);
+	      }
+	    }
 
-	    startEditing
-	      .append('div')
-	      .text(_t('splash.start'));
+	    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();
+	    });
+	  }
 
-	    modalSelection.select('button.close')
-	      .attr('class','hide');
+	  return function (selection) {
+	    update(selection);
+	    context.validator().on('validated.infobox', function () {
+	      update(selection);
+	    });
 	  };
 	}
 
-	function uiStatus(context) {
-	    var osm = context.connection();
+	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)
 
+	    var _dMini; // dimensions of minimap
 
-	    return function(selection) {
-	        if (!osm) { return; }
 
-	        function update(err, apiStatus) {
-	            selection.html('');
+	    var _cMini; // center pixel of minimap
 
-	            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
-	                        .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();
-	                        });
-	                }
+	    var _tStart; // transform at start of gesture
 
-	            } else if (apiStatus === 'readonly') {
-	                selection.text(_t('osm_api_status.message.readonly'));
-	            } else if (apiStatus === 'offline') {
-	                selection.text(_t('osm_api_status.message.offline'));
-	            }
 
-	            selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
-	        }
+	    var _tCurr; // transform at most recent event
 
-	        osm.on('apiStatusChange.uiStatus', update);
 
-	        // reload the status periodically regardless of other factors
-	        window.setInterval(function() {
-	            osm.reloadApiStatus();
-	        }, 90000);
+	    var _timeoutID;
 
-	        // load the initial status in case no OSM data was loaded yet
-	        osm.reloadApiStatus();
-	    };
-	}
+	    function zoomStarted() {
+	      if (_skipEvents) return;
+	      _tStart = _tCurr = projection.transform();
+	      _gesture = null;
+	    }
 
-	function modeDrawArea(context, wayID, startGraph, button) {
-	    var mode = {
-	        button: button,
-	        id: 'draw-area'
-	    };
+	    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;
 
-	    var behavior = behaviorDrawWay(context, wayID, mode, startGraph)
-	        .on('rejectedSelfIntersection.modeDrawArea', function() {
-	            context.ui().flash
-	                .text(_t('self_intersection.error.areas'))();
-	        });
+	      if (!isZooming && !isPanning) {
+	        return; // no change
+	      } // lock in either zooming or panning, don't allow both in minimap.
 
-	    mode.wayID = wayID;
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	      if (!_gesture) {
+	        _gesture = isZooming ? 'zoom' : 'pan';
+	      }
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	      var tMini = projection.transform();
+	      var tX, tY, scale;
 
-	    mode.selectedIDs = function() {
-	        return [wayID];
-	    };
+	      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;
+	      }
 
-	    mode.activeID = function() {
-	        return (behavior && behavior.activeID()) || [];
-	    };
+	      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;
+	      }
 
-	    return mode;
-	}
+	      zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+	      _skipEvents = true;
+	      wrap.call(zoom.transform, _tCurr);
+	      _skipEvents = false;
+	    }
 
-	function modeAddArea(context, mode) {
-	    mode.id = 'add-area';
+	    function redraw() {
+	      clearTimeout(_timeoutID);
+	      if (_isHidden) return;
+	      updateProjection();
+	      var zMini = geoScaleToZoom(projection.scale()); // setup tile container
 
-	    var behavior = behaviorAddWay(context)
-	        .on('start', start)
-	        .on('startFromWay', startFromWay)
-	        .on('startFromNode', startFromNode);
+	      tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
+	      tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background
 
-	    var defaultTags = { area: 'yes' };
-	    if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'area'); }
+	      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
 
+	      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));
+	        }
+	      }
 
-	    function actionClose(wayId) {
-	        return function (graph) {
-	            return graph.replace(graph.entity(wayId).close());
+	      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;
+	        });
+	      }
 	    }
 
-
-	    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));
+	    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);
 
-	    function startFromWay(loc, edge) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
+	      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();
+	        });
+	      }
+	    }
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionClose(way.id),
-	            actionAddMidpoint({ loc: loc, edge: edge }, node)
-	        );
+	    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..
 
-	        context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
-	    }
+	    _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);
+	  }
 
-	    function startFromNode(node) {
-	        var startGraph = context.graph();
-	        var way = osmWay({ tags: defaultTags });
+	  return mapInMap;
+	}
 
-	        context.perform(
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionClose(way.id)
-	        );
+	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'));
 
-	        context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+	    function disableTooHigh() {
+	      var canEdit = context.map().zoom() >= context.minEditableZoom();
+	      div.style('display', canEdit ? 'none' : 'block');
 	    }
 
+	    context.map().on('move.notice', debounce(disableTooHigh, 500));
+	    disableTooHigh();
+	  };
+	}
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	function uiPhotoviewer(context) {
+	  var dispatch$1 = dispatch('resize');
 
+	  var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	  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);
+	      }
 
-	    return mode;
-	}
+	      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));
+	      }
 
-	function modeAddLine(context, mode) {
-	    mode.id = 'add-line';
+	      function clamp(num, min, max) {
+	        return Math.max(min, Math.min(num, max));
+	      }
 
-	    var behavior = behaviorAddWay(context)
-	        .on('start', start)
-	        .on('startFromWay', startFromWay)
-	        .on('startFromNode', startFromNode);
+	      function stopResize(d3_event) {
+	        if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+	        d3_event.preventDefault();
+	        d3_event.stopPropagation(); // remove all the listeners we added
 
-	    var defaultTags = {};
-	    if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'line'); }
+	        select(window).on('.' + eventName, null);
+	      }
 
+	      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);
 
-	    function start(loc) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
+	        if (_pointerPrefix === 'pointer') {
+	          select(window).on('pointercancel.' + eventName, stopResize, false);
+	        }
+	      };
+	    }
+	  }
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id)
-	        );
+	  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)
 
-	        context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
-	    }
+	    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)];
+	      photoviewer.style('width', setPhotoDimensions[0] + 'px').style('height', setPhotoDimensions[1] + 'px');
+	      dispatch$1.call('resize', photoviewer, setPhotoDimensions);
+	    }
+	  };
 
-	    function startFromWay(loc, edge) {
-	        var startGraph = context.graph();
-	        var node = osmNode({ loc: loc });
-	        var way = osmWay({ tags: defaultTags });
+	  return utilRebind(photoviewer, dispatch$1, 'on');
+	}
 
-	        context.perform(
-	            actionAddEntity(node),
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id),
-	            actionAddMidpoint({ loc: loc, edge: edge }, node)
-	        );
+	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();
+	  };
+	}
 
-	        context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
-	    }
+	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;
 
+	    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 startFromNode(node) {
-	        var startGraph = context.graph();
-	        var way = osmWay({ tags: defaultTags });
 
-	        context.perform(
-	            actionAddEntity(way),
-	            actionAddVertex(way.id, node.id)
-	        );
+	    for (i = 0; i < buckets.length; i++) {
+	      val = buckets[i];
 
-	        context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+	      if (dist >= val) {
+	        scale.dist = Math.floor(dist / val) * val;
+	        break;
+	      } else {
+	        scale.dist = +dist.toFixed(2);
+	      }
 	    }
 
+	    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;
+	  }
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
-
+	  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);
+	  }
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	  return function (selection) {
+	    function switchUnits() {
+	      isImperial = !isImperial;
+	      selection.call(update);
+	    }
 
-	    return mode;
+	    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 modeAddPoint(context, mode) {
+	function uiShortcuts(context) {
+	  var detected = utilDetect();
+	  var _activeTab = 0;
 
-	    mode.id = 'add-point';
+	  var _modalSelection;
 
-	    var behavior = behaviorDraw(context)
-	        .on('click', add)
-	        .on('clickWay', addWay)
-	        .on('clickNode', addNode)
-	        .on('cancel', cancel)
-	        .on('finish', cancel);
+	  var _selection = select(null);
 
-	    var defaultTags = {};
-	    if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'point'); }
+	  function shortcutsModal(_modalSelection) {
+	    _modalSelection.select('.modal').classed('modal-shortcuts', true);
 
+	    var content = _modalSelection.select('.content');
 
-	    function add(loc) {
-	        var node = osmNode({ loc: loc, tags: defaultTags });
+	    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 */
+	    });
+	  }
 
-	        context.perform(
-	            actionAddEntity(node),
-	            _t('operations.add.annotation.point')
-	        );
+	  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
 
-	        enterSelectMode(node);
-	    }
+	    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
 
-	    function addWay(loc, edge) {
-	        var node = osmNode({ tags: defaultTags });
 
-	        context.perform(
-	            actionAddMidpoint({loc: loc, edge: edge}, node),
-	            _t('operations.add.annotation.vertex')
-	        );
+	      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;
+	        });
+	      }
 
-	        enterSelectMode(node);
-	    }
+	      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
 
-	    function enterSelectMode(node) {
-	        context.enter(
-	            modeSelect(context, [node.id]).newFeature(true)
-	        );
-	    }
+	    wrapper.selectAll('.shortcut-tab').style('display', function (d, i) {
+	      return i === _activeTab ? 'flex' : 'none';
+	    });
+	  }
 
+	  return function (selection, show) {
+	    _selection = selection;
 
-	    function addNode(node) {
-	        if (Object.keys(defaultTags).length === 0) {
-	            enterSelectMode(node);
-	            return;
-	        }
+	    if (show) {
+	      _modalSelection = uiModal(selection);
 
-	        var tags = Object.assign({}, node.tags);  // shallow copy
-	        for (var key in defaultTags) {
-	            tags[key] = defaultTags[key];
-	        }
+	      _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();
 
-	        context.perform(
-	            actionChangeTags(node.id, tags),
-	            _t('operations.add.annotation.point')
-	        );
+	            _modalSelection = null;
+	          }
+	        } else {
+	          _modalSelection = uiModal(_selection);
 
-	        enterSelectMode(node);
+	          _modalSelection.call(shortcutsModal);
+	        }
+	      });
 	    }
+	  };
+	}
 
+	var pair_1 = pair;
 
-	    function cancel() {
-	        context.enter(modeBrowse(context));
-	    }
+	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 matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	  var dim;
 
+	  if (m[1] && m[5]) {
+	    // if matched both..
+	    dim = m[1]; // keep leading
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	    matched = matched.slice(0, -1); // remove trailing dimension from match
+	  } else {
+	    dim = m[1] || m[5];
+	  } // if unrecognized dimension
 
 
-	    return mode;
-	}
+	  if (dim && dims.indexOf(dim) === -1) return null; // extract DMS
 
-	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')
-	    };
+	  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)
+	  };
+	}
 
-	    var behavior = behaviorDraw(context)
-	        .on('click', add)
-	        .on('cancel', cancel)
-	        .on('finish', cancel);
+	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;
 
+	  if (one.dim) {
+	    return swapdim(one.val, two.val, one.dim);
+	  } else {
+	    return [one.val, two.val];
+	  }
+	}
 
-	    function add(loc) {
-	        var osm = services.osm;
-	        if (!osm) { return; }
+	function swapdim(a, b, dim) {
+	  if (dim === 'N' || dim === 'S') return [a, b];
+	  if (dim === 'W' || dim === 'E') return [b, a];
+	}
 
-	        var note = osmNote({ loc: loc, status: 'open', comments: [] });
-	        osm.replaceNote(note);
+	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();
+	      }
+	    }
 
-	        // force a reraw (there is no history change that would otherwise do this)
-	        context.map().pan([0,0]);
+	    function keypress(d3_event) {
+	      var q = search.property('value'),
+	          items = list.selectAll('.feature-list-item');
 
-	        context
-	            .selectedNoteID(note.id)
-	            .enter(modeSelectNote(context, note.id).newFeature(true));
+	      if (d3_event.keyCode === 13 && // ↩ Return
+	      q.length && items.size()) {
+	        click(items.datum());
+	      }
 	    }
 
+	    function inputevent() {
+	      _geocodeResults = undefined;
+	      drawList();
+	    }
 
-	    function cancel() {
-	        context.enter(modeBrowse(context));
+	    function clearSearch() {
+	      search.property('value', '');
+	      drawList();
 	    }
 
+	    function mapDrawn(e) {
+	      if (e.full) {
+	        drawList();
+	      }
+	    }
 
-	    mode.enter = function() {
-	        context.install(behavior);
-	    };
+	    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
 
 
-	    mode.exit = function() {
-	        context.uninstall(behavior);
-	    };
+	      var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
 
+	      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
+	        });
+	      }
 
-	    return mode;
-	}
+	      var allEntities = graph.entities;
+	      var localResults = [];
 
-	function uiConflicts(context) {
-	    var dispatch$1 = dispatch('cancel', 'save');
-	    var keybinding = utilKeybinding('conflicts');
-	    var _origChanges;
-	    var _conflictList;
-	    var _shownConflictIndex;
+	      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;
+	      }
 
+	      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
+	          };
 
-	    function keybindingOn() {
-	        select(document)
-	            .call(keybinding.on('⎋', cancel, true));
-	    }
+	          if (d.osm_type === 'way') {
+	            // for ways, add some fake closed nodes
+	            attrs.nodes = ['a', 'a']; // so that geometry area is possible
+	          }
 
-	    function keybindingOff() {
-	        select(document)
-	            .call(keybinding.unbind);
-	    }
+	          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])])
+	          });
+	        }
+	      });
 
-	    function tryAgain() {
-	        keybindingOff();
-	        dispatch$1.call('save');
-	    }
+	      if (q.match(/^[0-9]+$/)) {
+	        // 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 cancel() {
-	        keybindingOff();
-	        dispatch$1.call('cancel');
+	      return result;
 	    }
 
+	    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 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')
-	            .text(_t('save.conflict.header'));
+	      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'));
+	      }
 
-	        var bodyEnter = selection.selectAll('.body')
-	            .data([0])
-	            .enter()
-	            .append('div')
-	            .attr('class', 'body fillL');
+	      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();
+	    }
 
-	        var conflictsHelpEnter = bodyEnter
-	            .append('div')
-	            .attr('class', 'conflicts-help')
-	            .text(_t('save.conflict.help'));
+	    function mouseover(d3_event, d) {
+	      if (d.id === -1) return;
+	      utilHighlightEntities([d.id], true, context);
+	    }
 
+	    function mouseout(d3_event, d) {
+	      if (d.id === -1) return;
+	      utilHighlightEntities([d.id], false, context);
+	    }
 
-	        // Download changes link
-	        var detected = utilDetect();
-	        var changeset = new osmChangeset();
+	    function click(d3_event, d) {
+	      d3_event.preventDefault();
 
-	        delete changeset.id;  // Export without changeset_id
+	      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 data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
-	        var blob = new Blob([data], { type: 'text/xml;charset=utf-8;' });
-	        var fileName = 'changes.osc';
+	    function geocoderSearch() {
+	      services.geocoder.search(search.property('value'), function (err, resp) {
+	        _geocodeResults = resp || [];
+	        drawList();
+	      });
+	    }
+	  }
 
-	        var linkEnter = conflictsHelpEnter.selectAll('.download-changes')
-	            .append('a')
-	            .attr('class', 'download-changes');
+	  return featureList;
+	}
 
-	        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 uiSectionEntityIssues(context) {
+	  var _entityIDs = [];
+	  var _issues = [];
 
-	        } else {                      // IE11 and Edge
-	            linkEnter                 // open data uri in a new tab
-	                .attr('target', '_blank')
-	                .on('click.download', function() {
-	                    navigator.msSaveBlob(blob, fileName);
-	                });
-	        }
+	  var _activeIssueID;
 
-	        linkEnter
-	            .call(svgIcon('#iD-icon-load', 'inline'))
-	            .append('span')
-	            .text(_t('save.conflict.download_changes'));
+	  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
+	    });
+	  }
 
-	        bodyEnter
-	            .append('div')
-	            .attr('class', 'conflict-container fillL3')
-	            .call(showConflict, 0);
+	  function makeActiveIssue(issueID) {
+	    _activeIssueID = issueID;
+	    section.selection().selectAll('.issue-container').classed('active', function (d) {
+	      return d.id === _activeIssueID;
+	    });
+	  }
 
-	        bodyEnter
-	            .append('div')
-	            .attr('class', 'conflicts-done')
-	            .attr('opacity', 0)
-	            .style('display', 'none')
-	            .text(_t('save.conflict.done'));
+	  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
 
-	        var buttonsEnter = bodyEnter
-	            .append('div')
-	            .attr('class','buttons col12 joined conflicts-buttons');
+	    containers.exit().remove(); // Enter
 
-	        buttonsEnter
-	            .append('button')
-	            .attr('disabled', _conflictList.length > 1)
-	            .attr('class', 'action conflicts-button col6')
-	            .text(_t('save.title'))
-	            .on('click.try_again', tryAgain);
+	    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
 
-	        buttonsEnter
-	            .append('button')
-	            .attr('class', 'secondary-action conflicts-button col6')
-	            .text(_t('confirm.cancel'))
-	            .on('click.cancel', cancel);
-	    }
+	      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
 
-	    function showConflict(selection, index) {
-	        index = utilWrap(index, _conflictList.length);
-	        _shownConflictIndex = index;
+	    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';
 
-	        var parent = select(selection.node().parentNode);
+	      if (iconName.startsWith('maki')) {
+	        iconName += '-15';
+	      }
 
-	        // 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);
+	      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;
+	      }
 
-	                parent.select('.conflicts-done')
-	                    .transition()
-	                    .attr('opacity', 1)
-	                    .style('display', 'block');
-	            }, 250);
-	        }
+	      return null;
+	    });
+	  }
 
-	        var conflict = selection
-	            .selectAll('.conflict')
-	            .data([_conflictList[index]]);
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
 
-	        conflict.exit()
-	            .remove();
+	    if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _activeIssueID = null;
+	      reloadIssues();
+	    }
 
-	        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);
-	            });
+	    return section;
+	  };
 
-	        var details = conflictEnter
-	            .append('div')
-	            .attr('class', 'conflict-detail-container');
+	  return section;
+	}
 
-	        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 uiPresetIcon() {
+	  var _preset;
 
-	        details
-	            .append('div')
-	            .attr('class', 'conflict-choices')
-	            .call(addChoices);
+	  var _geometry;
 
-	        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);
-	            });
+	  var _sizeClass = 'medium';
 
-	    }
+	  function isSmall() {
+	    return _sizeClass === 'small';
+	  }
 
+	  function presetIcon(selection) {
+	    selection.each(render);
+	  }
 
-	    function addChoices(selection) {
-	        var choices = selection
-	            .append('ul')
-	            .attr('class', 'layer-list')
-	            .selectAll('li')
-	            .data(function(d) { return d.choices || []; });
+	  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';
+	  }
 
-	        // enter
-	        var choicesEnter = choices.enter()
-	            .append('li')
-	            .attr('class', 'layer');
+	  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 = choicesEnter
-	            .append('label');
+	  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', '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);
-	            });
+	  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(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 (!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);
+	      });
 	    }
 
+	    fill = fillEnter.merge(fill);
+	    fill.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
+	    fill.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
+	  }
 
-	    function choose(ul, datum) {
-	        if (event) { event.preventDefault(); }
-
-	        select(ul)
-	            .selectAll('li')
-	            .classed('active', function(d) { return d === datum; })
-	            .selectAll('input')
-	            .property('checked', function(d) { return d === datum; });
+	  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 extent = geoExtent();
-	        var entity;
+	    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));
+	  }
 
-	        entity = context.graph().hasEntity(datum.id);
-	        if (entity) { extent._extend(entity.extent(context.graph())); }
+	  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
 
-	        datum.action();
+	    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);
 
-	        entity = context.graph().hasEntity(datum.id);
-	        if (entity) { extent._extend(entity.extent(context.graph())); }
+	    if (drawRoute) {
+	      var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
+	      var segmentPresetIDs = routeSegments[routeType];
 
-	        zoomToEntity(datum.id, extent);
+	      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.
 
 
-	    function zoomToEntity(id, extent) {
-	        context.surface().selectAll('.hover')
-	            .classed('hover', false);
+	  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']
+	  };
 
-	        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);
-	        }
-	    }
+	  function render() {
+	    var p = _preset.apply(this, arguments);
 
+	    var geom = _geometry ? _geometry.apply(this, arguments) : null;
 
-	    // 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 (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
+	      geom = 'route';
+	    }
 
+	    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) : {};
 
-	    conflicts.origChanges = function(_) {
-	        if (!arguments.length) { return _origChanges; }
-	        _origChanges = _;
-	        return conflicts;
-	    };
+	    for (var k in tags) {
+	      if (tags[k] === '*') {
+	        tags[k] = 'yes';
+	      }
+	    }
 
+	    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;
+	  };
 
-	    conflicts.shownEntityIds = function() {
-	        if (_conflictList && typeof _shownConflictIndex === 'number') {
-	            return [_conflictList[_shownConflictIndex].id];
-	        }
-	        return [];
-	    };
+	  presetIcon.geometry = function (val) {
+	    if (!arguments.length) return _geometry;
+	    _geometry = utilFunctor(val);
+	    return presetIcon;
+	  };
 
+	  presetIcon.sizeClass = function (val) {
+	    if (!arguments.length) return _sizeClass;
+	    _sizeClass = val;
+	    return presetIcon;
+	  };
 
-	    return utilRebind(conflicts, dispatch$1, 'on');
+	  return presetIcon;
 	}
 
-	function uiConfirm(selection) {
-	    var modalSelection = uiModal(selection);
-
-	    modalSelection.select('.modal')
-	        .classed('modal-alert', true);
+	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;
+	    });
+	  }
 
-	    var section = modalSelection.select('.content');
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return section;
+	  };
 
-	    section.append('div')
-	        .attr('class', 'modal-section header');
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets; // don't reload the same preset
 
-	    section.append('div')
-	        .attr('class', 'modal-section message-text');
+	    if (!utilArrayIdentical(val, _presets)) {
+	      _presets = val;
 
-	    var buttons = section.append('div')
-	        .attr('class', 'modal-section buttons cf');
+	      if (_presets.length === 1) {
+	        _tagReference = uiTagReference(_presets[0].reference()).showing(false);
+	      }
+	    }
 
+	    return section;
+	  };
 
-	    modalSelection.okButton = function() {
-	        buttons
-	            .append('button')
-	            .attr('class', 'button ok-button action')
-	            .on('click.confirm', function() {
-	                modalSelection.remove();
-	            })
-	            .text(_t('confirm.okay'))
-	            .node()
-	            .focus();
+	  function entityGeometries() {
+	    var counts = {};
 
-	        return modalSelection;
-	    };
+	    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];
+	    });
+	  }
 
-	    return modalSelection;
+	  return utilRebind(section, dispatch$1, 'on');
 	}
 
-	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;
+	// It borrows some code from uiHelp
 
+	function uiFieldHelp(context, fieldName) {
+	  var fieldHelp = {};
 
-	    function changesetEditor(selection) {
-	        render(selection);
-	    }
+	  var _inspector = select(null);
 
+	  var _wrap = select(null);
 
-	    function render(selection) {
-	        var initial = false;
+	  var _body = select(null);
 
-	        if (!_fieldsArr) {
-	            initial = true;
-	            var presets = _mainPresetIndex;
+	  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
 
-	            _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 }) ];
+	  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?
 
-	            _fieldsArr.forEach(function(field) {
-	                field
-	                    .on('change', function(t, onInput) {
-	                        dispatch$1.call('change', field, undefined, t, onInput);
-	                    });
-	            });
-	        }
+	      var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
 
-	        _fieldsArr.forEach(function(field) {
-	            field
-	                .tags(_tags);
-	        });
+	      return all + hhh + _t.html(subkey, replacements) + '\n\n';
+	    }, '');
+	    return {
+	      key: helpkey,
+	      title: _t.html(helpkey + '.title'),
+	      html: marked_1(text.trim())
+	    };
+	  });
 
+	  function show() {
+	    updatePosition();
 
-	        selection
-	            .call(formFields.fieldsArr(_fieldsArr));
+	    _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
+	  }
 
+	  function hide() {
+	    _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
+	      _body.classed('hide', true);
+	    });
+	  }
 
-	        if (initial) {
-	            var commentField = selection.select('.form-field-comment textarea');
-	            var commentNode = commentField.node();
+	  function clickHelp(index) {
+	    var d = docs[index];
+	    var tkeys = fieldHelpKeys[fieldName][index][1];
 
-	            if (commentNode) {
-	                commentNode.focus();
-	                commentNode.select();
-	            }
+	    _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
+	      return i === index;
+	    });
 
-	            // trigger a 'blur' event so that comment field can be cleaned
-	            // and checked for hashtags, even if retrieved from localstorage
-	            utilTriggerEvent(commentField, 'blur');
+	    var content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them
 
-	            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'))
-	                        );
-	                });
-	            }
-	        }
 
-	        // 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] : []);
+	    content.selectAll('p').attr('class', function (d, i) {
+	      return tkeys[i];
+	    }); // insert special content for certain help sections
 
-	        commentWarning.exit()
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 0)
-	            .remove();
+	    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'));
+	    }
+	  }
 
-	        var commentEnter = commentWarning.enter()
-	            .insert('div', '.tag-reference-body')
-	            .attr('class', 'field-warning comment-warning')
-	            .style('opacity', 0);
+	  fieldHelp.button = function (selection) {
+	    if (_body.empty()) return;
+	    var button = selection.selectAll('.field-help-button').data([0]); // enter/update
 
-	        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'));
+	    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();
 
-	        commentEnter
-	            .transition()
-	            .duration(200)
-	            .style('opacity', 1);
-	    }
+	      if (_body.classed('hide')) {
+	        show();
+	      } else {
+	        hide();
+	      }
+	    });
+	  };
 
+	  function updatePosition() {
+	    var wrap = _wrap.node();
 
-	    changesetEditor.tags = function(_) {
-	        if (!arguments.length) { return _tags; }
-	        _tags = _;
-	        // Don't reset _fieldsArr here.
-	        return changesetEditor;
-	    };
+	    var inspector = _inspector.node();
 
+	    var wRect = wrap.getBoundingClientRect();
+	    var iRect = inspector.getBoundingClientRect();
 
-	    changesetEditor.changesetID = function(_) {
-	        if (!arguments.length) { return _changesetID; }
-	        if (_changesetID === _) { return changesetEditor; }
-	        _changesetID = _;
-	        _fieldsArr = null;
-	        return changesetEditor;
-	    };
+	    _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
+	  }
 
+	  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
 
-	    return utilRebind(changesetEditor, dispatch$1, 'on');
-	}
+	    _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
+	    if (_inspector.empty()) return;
+	    _body = _inspector.selectAll('.field-help-body').data([0]);
 
-	function uiSectionChanges(context) {
-	    var detected = utilDetect();
+	    var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden
 
-	    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);
+	    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 renderDisclosureContent(selection) {
-	        var history = context.history();
-	        var summary = history.difference().summary();
+	  return fieldHelp;
+	}
 
-	        var container = selection.selectAll('.commit-section')
-	            .data([0]);
+	function uiFieldCheck(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var options = field.strings && field.strings.options;
+	  var values = [];
+	  var texts = [];
 
-	        var containerEnter = container.enter()
-	            .append('div')
-	            .attr('class', 'commit-section');
+	  var _tags;
 
-	        containerEnter
-	            .append('ul')
-	            .attr('class', 'changeset-list');
+	  var input = select(null);
+	  var text = select(null);
+	  var label = select(null);
+	  var reverser = select(null);
 
-	        container = containerEnter
-	            .merge(container);
+	  var _impliedYes;
 
+	  var _entityIDs = [];
 
-	        var items = container.select('ul').selectAll('li')
-	            .data(summary);
+	  var _value;
 
-	        var itemsEnter = items.enter()
-	            .append('li')
-	            .attr('class', 'change-item');
+	  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')];
 
-	        itemsEnter
-	            .each(function(d) {
-	                select(this)
-	                    .call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
-	            });
+	    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"
 
-	        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);
-	            });
 
-	        itemsEnter
-	            .append('span')
-	            .attr('class', 'entity-name')
-	            .text(function(d) {
-	                var name = utilDisplayName(d.entity) || '',
-	                    string = '';
-	                if (name !== '') {
-	                    string += ':';
-	                }
-	                return string += ' ' + name;
-	            });
+	  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
 
-	        itemsEnter
-	            .style('opacity', 0)
-	            .transition()
-	            .style('opacity', 1);
+	    if (field.id === 'oneway') {
+	      var entity = context.entity(_entityIDs[0]);
 
-	        items = itemsEnter
-	            .merge(items);
+	      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;
+	        }
+	      }
+	    }
+	  }
 
-	        items
-	            .on('mouseover', mouseover)
-	            .on('mouseout', mouseout)
-	            .on('click', click);
+	  function reverserHidden() {
+	    if (!context.container().select('div.inspector-hover').empty()) return true;
+	    return !(_value === 'yes' || _impliedYes && !_value);
+	  }
 
+	  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;
+	  }
 
-	        // Download changeset link
-	        var changeset = new osmChangeset().update({ id: undefined });
-	        var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	  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');
 
-	        delete changeset.id;  // Export without chnageset_id
+	    if (field.type === 'onewayCheck') {
+	      enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
+	    }
 
-	        var data = JXON.stringify(changeset.osmChangeJXON(changes));
-	        var blob = new Blob([data], {type: 'text/xml;charset=utf-8;'});
-	        var fileName = 'changes.osc';
+	    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 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);
-	                });
+	      if (Array.isArray(_tags[field.key])) {
+	        if (values.indexOf('yes') !== -1) {
+	          t[field.key] = 'yes';
+	        } else {
+	          t[field.key] = values[0];
 	        }
-
-	        linkEnter
-	            .call(svgIcon('#iD-icon-load', 'inline'))
-	            .append('span')
-	            .text(_t('commit.download_changes'));
+	      } 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)
 
 
-	        function mouseover(d) {
-	            if (d.entity) {
-	                context.surface().selectAll(
-	                    utilEntityOrMemberSelector([d.entity.id], context.graph())
-	                ).classed('hover', true);
-	            }
-	        }
+	      if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
+	        t[field.key] = values[0];
+	      }
 
+	      dispatch$1.call('change', this, t);
+	    });
 
-	        function mouseout() {
-	            context.surface().selectAll('.hover')
-	                .classed('hover', false);
-	        }
+	    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);
+	          }
 
+	          return graph;
+	        }, _t('operations.reverse.annotation.line', {
+	          n: 1
+	        })); // must manually revalidate since no 'change' event was called
 
-	        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);
-	            }
-	        }
+	        context.validator().validate();
+	        select(this).call(reverserSetText);
+	      });
 	    }
+	  };
 
-	    return section;
-	}
-
-	function uiCommitWarnings(context) {
+	  check.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return check;
+	  };
 
-	    function commitWarnings(selection) {
-	        var issuesBySeverity = context.validator()
-	            .getIssuesBySeverity({ what: 'edited', where: 'all', includeDisabledRules: true });
+	  check.tags = function (tags) {
+	    _tags = tags;
 
-	        for (var severity in issuesBySeverity) {
-	            var issues = issuesBySeverity[severity];
-	            var section = severity + '-section';
-	            var issueItem = severity + '-item';
+	    function isChecked(val) {
+	      return val !== 'no' && val !== '' && val !== undefined && val !== null;
+	    }
 
-	            var container = selection.selectAll('.' + section)
-	                .data(issues.length ? [0] : []);
+	    function textFor(val) {
+	      if (val === '') val = undefined;
+	      var index = values.indexOf(val);
+	      return index !== -1 ? texts[index] : '"' + val + '"';
+	    }
 
-	            container.exit()
-	                .remove();
+	    checkImpliedYes();
+	    var isMixed = Array.isArray(tags[field.key]);
+	    _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
 
-	            var containerEnter = container.enter()
-	                .append('div')
-	                .attr('class', 'modal-section ' + section + ' fillL2');
+	    if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
+	      _value = 'yes';
+	    }
 
-	            containerEnter
-	                .append('h3')
-	                .text(severity === 'warning' ? _t('commit.warnings') : _t('commit.errors'));
+	    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);
 
-	            containerEnter
-	                .append('ul')
-	                .attr('class', 'changeset-list');
+	    if (field.type === 'onewayCheck') {
+	      reverser.classed('hide', reverserHidden()).call(reverserSetText);
+	    }
+	  };
 
-	            container = containerEnter
-	                .merge(container);
+	  check.focus = function () {
+	    input.node().focus();
+	  };
 
+	  return utilRebind(check, dispatch$1, 'on');
+	}
 
-	            var items = container.select('ul').selectAll('li')
-	                .data(issues, function(d) { return d.id; });
+	function uiFieldCombo(field, context) {
+	  var dispatch$1 = dispatch('change');
 
-	            items.exit()
-	                .remove();
+	  var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';
 
-	            var itemsEnter = items.enter()
-	                .append('li')
-	                .attr('class', issueItem);
+	  var _isNetwork = field.type === 'networkCombo';
 
-	            itemsEnter
-	                .call(svgIcon('#iD-icon-alert', 'pre-text'));
+	  var _isSemi = field.type === 'semiCombo';
 
-	            itemsEnter
-	                .append('strong')
-	                .attr('class', 'issue-message');
+	  var _optstrings = field.strings && field.strings.options;
 
-	            itemsEnter.filter(function(d) { return d.tooltip; })
-	                .call(uiTooltip()
-	                    .title(function(d) { return d.tooltip; })
-	                    .placement('top')
-	                );
+	  var _optarray = field.options;
 
-	            items = itemsEnter
-	                .merge(items);
+	  var _snake_case = field.snake_case || field.snake_case === undefined;
 
-	            items.selectAll('.issue-message')
-	                .text(function(d) {
-	                    return d.message(context);
-	                });
+	  var _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);
 
-	            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);
-	                });
-	        }
-	    }
+	  var _container = select(null);
 
+	  var _inputWrap = select(null);
 
-	    return commitWarnings;
-	}
+	  var _input = select(null);
 
-	var readOnlyTags = [
-	    /^changesets_count$/,
-	    /^created_by$/,
-	    /^ideditor:/,
-	    /^imagery_used$/,
-	    /^host$/,
-	    /^locale$/,
-	    /^warnings:/,
-	    /^resolved:/,
-	    /^closed:note$/,
-	    /^closed:keepright$/,
-	    /^closed:improveosm:/,
-	    /^closed:osmose:/
-	];
+	  var _comboData = [];
+	  var _multiData = [];
+	  var _entityIDs = [];
 
-	// treat most punctuation (except -, _, +, &) as hashtag delimiters - #4398
-	// from https://stackoverflow.com/a/25575009
-	var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
+	  var _tags;
 
+	  var _countryCode;
 
-	function uiCommit(context) {
-	    var dispatch$1 = dispatch('cancel');
-	    var _userDetails;
-	    var _selection;
+	  var _staticPlaceholder; // initialize deprecated tags array
 
-	    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);
 
+	  var _dataDeprecated = [];
+	  _mainFileFetcher.get('deprecated').then(function (d) {
+	    _dataDeprecated = d;
+	  })["catch"](function () {
+	    /* ignore */
+	  }); // ensure multiCombo field.key ends with a ':'
 
-	    function commit(selection) {
-	        _selection = selection;
+	  if (_isMulti && field.key && /[^:]$/.test(field.key)) {
+	    field.key += ':';
+	  }
 
-	        // Initialize changeset if one does not exist yet.
-	        if (!context.changeset) { initChangeset(); }
+	  function snake(s) {
+	    return s.replace(/\s+/g, '_');
+	  }
 
-	        loadDerivedChangesetTags();
+	  function unsnake(s) {
+	    return s.replace(/_+/g, ' ');
+	  }
 
-	        selection.call(render);
-	    }
+	  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)
 
-	    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
-	        if (commentDate > currDate || currDate - commentDate > cutoff) {
-	            corePreferences('comment', null);
-	            corePreferences('hashtags', null);
-	            corePreferences('source', null);
-	        }
+	  function tagValue(dval) {
+	    dval = clean(dval || '');
 
-	        // 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());
-	        }
+	    if (_optstrings) {
+	      var found = _comboData.find(function (o) {
+	        return o.key && clean(o.value) === dval;
+	      });
 
-	        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())
-	        };
+	      if (found) {
+	        return found.key;
+	      }
+	    }
 
-	        // call findHashtags initially - this will remove stored
-	        // hashtags if any hashtags are found in the comment - #4304
-	        findHashtags(tags, true);
+	    if (field.type === 'typeCombo' && !dval) {
+	      return 'yes';
+	    }
 
-	        var hashtags = corePreferences('hashtags');
-	        if (hashtags) {
-	            tags.hashtags = hashtags;
-	        }
+	    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 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');
-	            }
+	  function displayValue(tval) {
+	    tval = tval || '';
 
-	            // add the photo overlays used during editing as sources
-	            photoOverlaysUsed.forEach(function(photoOverlay) {
-	                if (sources.indexOf(photoOverlay) === -1) {
-	                    sources.push(photoOverlay);
-	                }
-	            });
+	    if (_optstrings) {
+	      var found = _comboData.find(function (o) {
+	        return o.key === tval && o.value;
+	      });
 
-	            tags.source = context.cleanTagValue(sources.join(';'));
-	        }
+	      if (found) {
+	        return found.value;
+	      }
+	    }
 
-	        context.changeset = new osmChangeset({ tags: tags });
+	    if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
+	      return '';
 	    }
 
-	    // Calculates read-only metadata tags based on the user's editing session and applies
-	    // them to the changeset.
-	    function loadDerivedChangesetTags() {
+	    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}]
+	  //
 
-	        var osm = context.connection();
-	        if (!osm) { return; }
 
-	        var tags = Object.assign({}, context.changeset.tags);   // shallow copy
+	  function objectDifference(a, b) {
+	    return a.filter(function (d1) {
+	      return !b.some(function (d2) {
+	        return !d2.isMixed && d1.value === d2.value;
+	      });
+	    });
+	  }
 
-	        // assign tags for imagery used
-	        var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
-	        tags.imagery_used = imageryUsed || 'None';
+	  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);
+	    }
+	  }
 
-	        // 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());
-	            }
-	        }
+	  function setStaticValues(callback) {
+	    if (!(_optstrings || _optarray)) return;
 
-	        // remove existing issue counts
-	        for (var key in tags) {
-	            if (key.match(/(^warnings:)|(^resolved:)/)) {
-	                delete tags[key];
-	            }
-	        }
+	    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
+	        };
+	      });
+	    }
 
-	        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());
-	                }
-	            }
-	        }
+	    _combobox.data(objectDifference(_comboData, _multiData));
 
-	        // 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');
+	    if (callback) callback(_comboData);
+	  }
 
-	        // add counts of issues resolved by the user's edits
-	        var resolvedIssues = context.validator().getResolvedIssues();
-	        addIssueCounts(resolvedIssues, 'resolved');
+	  function setTaginfoValues(q, callback) {
+	    var fn = _isMulti ? 'multikeys' : 'values';
+	    var query = (_isMulti ? field.key : '') + q;
+	    var hasCountryPrefix = _isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;
 
-	        context.changeset = context.changeset.update({ tags: tags });
+	    if (hasCountryPrefix) {
+	      query = _countryCode + ':';
 	    }
 
-	    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 header-container');
+	    var params = {
+	      debounce: q !== '',
+	      key: field.key,
+	      query: query
+	    };
 
-	        headerTitle
-	            .append('div')
-	            .attr('class', 'header-block header-block-outer');
+	    if (_entityIDs.length) {
+	      params.geometry = context.graph().geometry(_entityIDs[0]);
+	    }
 
-	        headerTitle
-	            .append('div')
-	            .attr('class', 'header-block')
-	            .append('h3')
-	            .text(_t('commit.title'));
+	    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
 
-	        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);
 
+	        return !d.count || d.count > 10;
+	      });
+	      var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
 
-	        // Changeset Section
-	        var changesetSection = body.selectAll('.changeset-editor')
-	            .data([0]);
+	      if (deprecatedValues) {
+	        // don't suggest deprecated tag values
+	        data = data.filter(function (d) {
+	          return deprecatedValues.indexOf(d.value) === -1;
+	        });
+	      }
 
-	        changesetSection = changesetSection.enter()
-	            .append('div')
-	            .attr('class', 'modal-section changeset-editor')
-	            .merge(changesetSection);
+	      if (hasCountryPrefix) {
+	        data = data.filter(function (d) {
+	          return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
+	        });
+	      } // hide the caret if there are no suggestions
 
-	        changesetSection
-	            .call(changesetEditor
-	                .changesetID(context.changeset.id)
-	                .tags(context.changeset.tags)
-	            );
 
+	      _container.classed('empty-combobox', data.length === 0);
 
-	        // Warnings
-	        body.call(commitWarnings);
+	      _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);
+	    });
+	  }
 
+	  function setPlaceholder(values) {
+	    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;
+	      });
+	      var placeholders = vals.length > 1 ? vals : values.map(function (d) {
+	        return d.key;
+	      });
+	      _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
+	    }
 
-	        // Upload Explanation
-	        var saveSection = body.selectAll('.save-section')
-	            .data([0]);
+	    if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
+	      _staticPlaceholder += '…';
+	    }
 
-	        saveSection = saveSection.enter()
-	            .append('div')
-	            .attr('class','modal-section save-section fillL')
-	            .merge(saveSection);
+	    var ph;
 
-	        var prose = saveSection.selectAll('.commit-info')
-	            .data([0]);
+	    if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
+	      ph = _t('inspector.multiple_values');
+	    } else {
+	      ph = _staticPlaceholder;
+	    }
 
-	        if (prose.enter().size()) {   // first time, make sure to update user details in prose
-	            _userDetails = null;
-	        }
+	    _container.selectAll('input').attr('placeholder', ph);
+	  }
 
-	        prose = prose.enter()
-	            .append('p')
-	            .attr('class', 'commit-info')
-	            .text(_t('commit.upload_explanation'))
-	            .merge(prose);
+	  function change() {
+	    var t = {};
+	    var val;
 
-	        // 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 (_isMulti || _isSemi) {
+	      val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';
 
-	            if (_userDetails === user) { return; }  // no change
-	            _userDetails = user;
+	      _container.classed('active', false);
 
-	            var userLink = select(document.createElement('div'));
+	      utilGetSetValue(_input, '');
+	      var vals = val.split(';').filter(Boolean);
+	      if (!vals.length) return;
 
-	            if (user.image_url) {
-	                userLink
-	                    .append('img')
-	                    .attr('src', user.image_url)
-	                    .attr('class', 'icon pre-text user-icon');
-	            }
+	      if (_isMulti) {
+	        utilArrayUniq(vals).forEach(function (v) {
+	          var key = (field.key || '') + v;
 
-	            userLink
-	                .append('a')
-	                .attr('class', 'user-info')
-	                .text(user.display_name)
-	                .attr('href', osm.userURL(user.display_name))
-	                .attr('target', '_blank');
+	          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;
+	          }
 
-	            prose
-	                .html(_t('commit.upload_explanation_with_user', { user: userLink.html() }));
+	          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(';'));
+	      }
 
-	        // Request Review
-	        var requestReview = saveSection.selectAll('.request-review')
-	            .data([0]);
-
-	        // Enter
-	        var requestReviewEnter = requestReview.enter()
-	            .append('div')
-	            .attr('class', 'request-review');
-
-	        var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
+	      window.setTimeout(function () {
+	        _input.node().focus();
+	      }, 10);
+	    } else {
+	      var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string
 
-	        var labelEnter = requestReviewEnter
-	            .append('label')
-	            .attr('for', requestReviewDomId);
+	      if (!rawValue && Array.isArray(_tags[field.key])) return;
+	      val = context.cleanTagValue(tagValue(rawValue));
+	      t[field.key] = val || undefined;
+	    }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .attr('id', requestReviewDomId);
+	    dispatch$1.call('change', this, t);
+	  }
 
-	        labelEnter
-	            .append('span')
-	            .text(_t('commit.request_review'));
+	  function removeMultikey(d3_event, d) {
+	    d3_event.preventDefault();
+	    d3_event.stopPropagation();
+	    var t = {};
 
-	        // Update
-	        requestReview = requestReview
-	            .merge(requestReviewEnter);
+	    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);
 
-	        var requestReviewInput = requestReview.selectAll('input')
-	            .property('checked', isReviewRequested(context.changeset.tags))
-	            .on('change', toggleRequestReview);
+	      arr = utilArrayUniq(arr);
+	      t[field.key] = arr.length ? arr.join(';') : undefined;
+	    }
 
+	    dispatch$1.call('change', this, t);
+	  }
 
-	        // Buttons
-	        var buttonSection = saveSection.selectAll('.buttons')
-	            .data([0]);
+	  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);
 
-	        // enter
-	        var buttonEnter = buttonSection.enter()
-	            .append('div')
-	            .attr('class', 'buttons fillL');
+	    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
 
-	        buttonEnter
-	            .append('button')
-	            .attr('class', 'secondary-action button cancel-button')
-	            .append('span')
-	            .attr('class', 'label')
-	            .text(_t('commit.cancel'));
+	      if (field.key === 'destination') {
+	        listClass += ' full-line-chips';
+	      }
 
-	        var uploadButton = buttonEnter
-	            .append('button')
-	            .attr('class', 'action button save-button');
+	      _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]);
+	    }
 
-	        uploadButton.append('span')
-	            .attr('class', 'label')
-	            .text(_t('commit.save'));
+	    _input = _input.enter().append('input').attr('type', 'text').attr('id', field.domId).call(utilNoAuto).call(initCombo, selection).merge(_input);
 
-	        var uploadBlockerTooltipText = getUploadBlockerMessage();
+	    if (_isNetwork) {
+	      var extent = combinedEntityExtent();
+	      var countryCode = extent && iso1A2Code(extent.center());
+	      _countryCode = countryCode && countryCode.toLowerCase();
+	    }
 
-	        // update
-	        buttonSection = buttonSection
-	            .merge(buttonEnter);
+	    _input.on('change', change).on('blur', change);
 
-	        buttonSection.selectAll('.cancel-button')
-	            .on('click.cancel', function() {
-	                dispatch$1.call('cancel', this);
-	            });
+	    _input.on('keydown.field', function (d3_event) {
+	      switch (d3_event.keyCode) {
+	        case 13:
+	          // ↩ Return
+	          _input.node().blur(); // blurring also enters the value
 
-	        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);
-	                }
-	            });
 
-	        // remove any existing tooltip
-	        uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
+	          d3_event.stopPropagation();
+	          break;
+	      }
+	    });
 
-	        if (uploadBlockerTooltipText) {
-	            buttonSection.selectAll('.save-button')
-	                .call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
-	        }
+	    if (_isMulti || _isSemi) {
+	      _combobox.on('accept', function () {
+	        _input.node().blur();
 
-	        // Raw Tag Editor
-	        var tagSection = body.selectAll('.tag-section.raw-tag-editor')
-	            .data([0]);
+	        _input.node().focus();
+	      });
 
-	        tagSection = tagSection.enter()
-	            .append('div')
-	            .attr('class', 'modal-section tag-section raw-tag-editor')
-	            .merge(tagSection);
+	      _input.on('focus', function () {
+	        _container.classed('active', true);
+	      });
+	    }
+	  }
 
-	        tagSection
-	            .call(rawTagEditor
-	                .tags(Object.assign({}, context.changeset.tags))   // shallow copy
-	                .render
-	            );
+	  combo.tags = function (tags) {
+	    _tags = tags;
 
-	        var changesSection = body.selectAll('.commit-changes-section')
-	            .data([0]);
+	    if (_isMulti || _isSemi) {
+	      _multiData = [];
+	      var maxLength;
 
-	        changesSection = changesSection.enter()
-	            .append('div')
-	            .attr('class', 'modal-section commit-changes-section')
-	            .merge(changesSection);
+	      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)
+	          });
+	        }
 
-	        // Change summary
-	        changesSection.call(commitChanges.render);
+	        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
 
+	          maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+	        } else {
+	          maxLength = context.maxCharsForTagKey();
+	        }
+	      } else if (_isSemi) {
+	        var allValues = [];
+	        var commonValues;
 
-	        function toggleRequestReview() {
-	            var rr = requestReviewInput.property('checked');
-	            updateChangeset({ review_requested: (rr ? 'yes' : undefined) });
+	        if (Array.isArray(tags[field.key])) {
+	          tags[field.key].forEach(function (tagVal) {
+	            var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
+	            allValues = allValues.concat(thisVals);
 
-	            tagSection
-	                .call(rawTagEditor
-	                    .tags(Object.assign({}, context.changeset.tags))   // shallow copy
-	                    .render
-	                );
+	            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;
 	        }
-	    }
 
+	        _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
 
-	    function getUploadBlockerMessage() {
-	        var errors = context.validator()
-	            .getIssuesBySeverity({ what: 'edited', where: 'all' }).error;
-
-	        if (errors.length) {
-	            return _t('commit.outstanding_errors_message', { count: errors.length });
+	        maxLength = context.maxCharsForTagValue() - currLength;
 
-	        } else {
-	            var hasChangesetComment = context.changeset && context.changeset.tags.comment && context.changeset.tags.comment.trim().length;
-	            if (!hasChangesetComment) {
-	                return _t('commit.comment_needed_message');
-	            }
+	        if (currLength > 0) {
+	          // account for the separator if a new value will be appended to existing
+	          maxLength -= 1;
 	        }
-	        return null;
-	    }
+	      } // a negative maxlength doesn't make sense
 
 
-	    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`
+	      maxLength = Math.max(0, maxLength);
+	      var allowDragAndDrop = _isSemi // only semiCombo values are ordered
+	      && !Array.isArray(tags[field.key]); // Exclude existing multikeys from combo options..
 
-	        updateChangeset(changed, onInput);
+	      var available = objectDifference(_comboData, _multiData);
 
-	        if (_selection) {
-	            _selection.call(render);
-	        }
-	    }
+	      _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
 
 
-	    function findHashtags(tags, commentOnly) {
-	        var detectedHashtags = commentHashtags();
+	      var hideAdd = _optstrings && !available.length || maxLength <= 0;
 
-	        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());
-	        }
+	      _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips
 
-	        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;
-	        });
 
-	        // 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 chips = _container.selectAll('.chip').data(_multiData);
 
-	            return matches || [];
-	        }
+	      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;
+	      });
 
-	        // 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
+	      if (allowDragAndDrop) {
+	        registerDragAndDrop(chips);
+	      }
 
-	            return matches || [];
-	        }
+	      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);
 	    }
+	  };
 
+	  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%)';
+	          }
 
-	    function isReviewRequested(tags) {
-	        var rr = tags.review_requested;
-	        if (rr === undefined) { return false; }
-	        rr = rr.trim().toLowerCase();
-	        return !(rr === '' || rr === 'no');
-	    }
+	          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 && 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();
 
-	    function updateChangeset(changed, onInput) {
-	        var tags = Object.assign({}, context.changeset.tags);   // shallow copy
+	          if (index === index2) {
+	            return 'translate(' + x + 'px, ' + y + 'px)';
+	          } // only translate tags in the same row
 
-	        Object.keys(changed).forEach(function(k) {
-	            var v = changed[k];
-	            k = context.cleanTagKey(k);
-	            if (readOnlyTags.indexOf(k) !== -1) { return; }
 
-	            if (k !== '' && v !== undefined) {
-	                if (onInput) {
-	                    tags[k] = v;
-	                } else {
-	                    tags[k] = context.cleanTagValue(v);
-	                }
-	            } else {
-	                delete tags[k];
+	          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 () {
+	      if (!select(this).classed('dragging')) {
+	        return;
+	      }
 
-	        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);
-	            }
-	        }
+	      var index = selection.nodes().indexOf(this);
+	      select(this).classed('dragging', false);
 
-	        // 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);
+	      _container.selectAll('.chip').style('transform', null);
 
-	            // first 100 edits - new user
-	            if (changesetsCount <= 100) {
-	                var s;
-	                s = corePreferences('walkthrough_completed');
-	                if (s) {
-	                    tags['ideditor:walkthrough_completed'] = s;
-	                }
+	      if (typeof targetIndex === 'number') {
+	        var element = _multiData[index];
 
-	                s = corePreferences('walkthrough_progress');
-	                if (s) {
-	                    tags['ideditor:walkthrough_progress'] = s;
-	                }
+	        _multiData.splice(index, 1);
 
-	                s = corePreferences('walkthrough_started');
-	                if (s) {
-	                    tags['ideditor:walkthrough_started'] = s;
-	                }
-	            }
+	        _multiData.splice(targetIndex, 0, element);
+
+	        var t = {};
+
+	        if (_multiData.length) {
+	          t[field.key] = _multiData.map(function (element) {
+	            return element.key;
+	          }).join(';');
 	        } else {
-	            delete tags.changesets_count;
+	          t[field.key] = undefined;
 	        }
 
-	        if (!fastDeepEqual(context.changeset.tags, tags)) {
-	            context.changeset = context.changeset.update({ tags: tags });
-	        }
-	    }
+	        dispatch$1.call('change', this, t);
+	      }
 
+	      dragOrigin = undefined;
+	      targetIndex = undefined;
+	    }));
+	  }
 
-	    commit.reset = function() {
-	        context.changeset = null;
-	    };
+	  combo.focus = function () {
+	    _input.node().focus();
+	  };
+
+	  combo.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return combo;
+	  };
 
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	    return utilRebind(commit, dispatch$1, 'on');
+	  return utilRebind(combo, dispatch$1, 'on');
 	}
 
-	var RADIUS = 6378137;
-	var FLATTENING = 1/298.257223563;
-	var POLAR_RADIUS$1 = 6356752.3142;
+	function uiFieldText(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var input = select(null);
+	  var outlinkButton = select(null);
+	  var _entityIDs = [];
 
-	var wgs84 = {
-		RADIUS: RADIUS,
-		FLATTENING: FLATTENING,
-		POLAR_RADIUS: POLAR_RADIUS$1
-	};
+	  var _tags;
 
-	var geometry_1 = geometry;
-	var ring = ringArea;
+	  var _phoneFormats = {};
 
-	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;
-	    }
-	}
+	  if (field.type === 'tel') {
+	    _mainFileFetcher.get('phone_formats').then(function (d) {
+	      _phoneFormats = d;
+	      updatePhonePlaceholder();
+	    })["catch"](function () {
+	      /* ignore */
+	    });
+	  }
 
-	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]));
+	  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 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.
-	 */
+	        return '';
+	      }).on('click', function (d3_event) {
+	        d3_event.preventDefault();
+	        var value = validIdentifierValueForLink();
 
-	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]));
+	        if (value) {
+	          var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
+	          window.open(url, '_blank');
 	        }
-
-	        area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
+	      }).merge(outlinkButton);
 	    }
+	  }
 
-	    return area;
-	}
-
-	function rad(_) {
-	    return _ * Math.PI / 180;
-	}
-
-	var geojsonArea = {
-		geometry: geometry_1,
-		ring: ring
-	};
-
-	function toRadians(angleInDegrees) {
-	  return (angleInDegrees * Math.PI) / 180;
-	}
-
-	function toDegrees(angleInRadians) {
-	  return (angleInRadians * 180) / Math.PI;
-	}
+	  function updatePhonePlaceholder() {
+	    if (input.empty() || !Object.keys(_phoneFormats).length) return;
+	    var extent = combinedEntityExtent();
+	    var countryCode = extent && iso1A2Code(extent.center());
 
-	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)];
-	}
+	    var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
 
-	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)
-	    );
+	    if (format) input.attr('placeholder', format);
 	  }
 
-	  if (lat > 90 || lat < -90) {
-	    throw new Error(
-	      ("ERROR! Latitude has to be between -90 and 90 but was " + lat)
-	    );
-	  }
-	}
+	  function validIdentifierValueForLink() {
+	    if (field.type === 'identifier' && field.pattern) {
+	      var value = utilGetSetValue(input).trim().split(';')[0];
+	      return value && value.match(new RegExp(field.pattern));
+	    }
 
-	function validateRadius(radius) {
-	  if (typeof radius !== "number") {
-	    throw new Error(
-	      ("ERROR! Radius has to be a positive number but was: " + (typeof radius))
-	    );
-	  }
+	    return null;
+	  } // clamp number to min/max
 
-	  if (radius <= 0) {
-	    throw new Error(
-	      ("ERROR! Radius has to be a positive number but was: " + radius)
-	    );
-	  }
-	}
 
-	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 clamped(num) {
+	    if (field.minValue !== undefined) {
+	      num = Math.max(num, field.minValue);
+	    }
 
-	  if (numberOfSegments < 3) {
-	    throw new Error(
-	      ("ERROR! Number of segments has to be at least 3 but was: " + numberOfSegments)
-	    );
+	    if (field.maxValue !== undefined) {
+	      num = Math.min(num, field.maxValue);
+	    }
+
+	    return num;
 	  }
-	}
 
-	function validateInput(ref) {
-	  var center = ref.center;
-	  var radius = ref.radius;
-	  var numberOfSegments = ref.numberOfSegments;
+	  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
 
-	  validateCenter(center);
-	  validateRadius(radius);
-	  validateNumberOfSegments(numberOfSegments);
-	}
+	      if (!val && Array.isArray(_tags[field.key])) return;
 
-	var circleToPolygon = function circleToPolygon(center, radius, numberOfSegments) {
-	  var n = numberOfSegments ? numberOfSegments : 32;
+	      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(';');
+	        }
 
-	  // validateInput() throws error on invalid input and do nothing on valid input
-	  validateInput({ center: center, radius: radius, numberOfSegments: numberOfSegments });
+	        utilGetSetValue(input, val);
+	      }
 
-	  var coordinates = [];
-	  for (var i = 0; i < n; ++i) {
-	    coordinates.push(offset(center, radius, (2 * Math.PI * -i) / n));
+	      t[field.key] = val || undefined;
+	      dispatch$1.call('change', this, t, onInput);
+	    };
 	  }
-	  coordinates.push(coordinates[0]);
 
-	  return {
-	    type: "Polygon",
-	    coordinates: [coordinates]
+	  i.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return i;
 	  };
-	};
 
-	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);
-	        }
-	      });
-	    }
+	  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);
 
-	    function multi(l) {
-	      return l.map(point);
+	    if (outlinkButton && !outlinkButton.empty()) {
+	      var disabled = !validIdentifierValueForLink();
+	      outlinkButton.classed('disabled', disabled);
 	    }
+	  };
 
-	    function poly(p) {
-	      return p.map(multi);
-	    }
+	  i.focus = function () {
+	    var node = input.node();
+	    if (node) node.focus();
+	  };
 
-	    function multiPoly(m) {
-	      return m.map(poly);
-	    }
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	    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 {};
-	      }
-	    }
+	  return utilRebind(i, dispatch$1, 'on');
+	}
 
-	    function feature(obj) {
-	      obj.geometry = geometry(obj.geometry);
-	      return obj
-	    }
+	function uiFieldAccess(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var items = select(null);
 
-	    function featureCollection(f) {
-	      f.features = f.features.map(feature);
-	      return f;
-	    }
+	  var _tags;
 
-	    function geometryCollection(g) {
-	      g.geometries = g.geometries.map(geometry);
-	      return g;
-	    }
+	  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
 
-	    if (!t) {
-	      return t;
-	    }
+	    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
 
-	    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;
-	    }
-	      
+	    items = items.merge(enter);
+	    wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
 	  }
 
-	  module.exports = parse;
-	  module.exports.parse = parse;
+	  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);
+	  }
 
-	}());
-	});
+	  access.options = function (type) {
+	    var options = ['no', 'permissive', 'private', 'permit', 'destination'];
 
-	/* Polyfill service v3.13.0
-	 * For detailed credits and licence information see http://github.com/financial-times/polyfill-service
-	 *
-	 * - Array.prototype.fill, License: CC0 */
+	    if (type !== 'access') {
+	      options.unshift('yes');
+	      options.push('designated');
 
-	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')
+	      if (type === 'bicycle') {
+	        options.push('dismount');
 	      }
+	    }
 
-	      var arrayLike = Object(this);
+	    return options.map(function (option) {
+	      return {
+	        title: field.t('options.' + option + '.description'),
+	        value: option
+	      };
+	    });
+	  };
 
-	      var length = Math.max(Math.min(arrayLike.length, 9007199254740991), 0) || 0;
+	  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');
+	      }
 
-	      var relativeStart = 1 in arguments ? parseInt(Number(arguments[1]), 10) || 0 : 0;
+	      if (d === 'access') {
+	        return 'yes';
+	      }
 
-	      relativeStart = relativeStart < 0 ? Math.max(length + relativeStart, 0) : Math.min(relativeStart, length);
+	      if (tags.access && typeof tags.access === 'string') {
+	        return tags.access;
+	      }
 
-	      var relativeEnd = 2 in arguments && arguments[2] !== undefined ? parseInt(Number(arguments[2]), 10) || 0 : length;
+	      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);
 
-	      relativeEnd = relativeEnd < 0 ? Math.max(length + arguments[2], 0) : Math.min(relativeEnd, length);
+	          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];
+	          }
+	        }
+	      }
 
-	      while (relativeStart < relativeEnd) {
-	        arrayLike[relativeStart] = value;
+	      return field.placeholder();
+	    });
+	  };
 
-	        ++relativeStart;
-	      }
+	  access.focus = function () {
+	    items.selectAll('.preset-input-access').node().focus();
+	  };
 
-	      return arrayLike
-	    },
-	    writable: true
-	  });
+	  return utilRebind(access, dispatch$1, 'on');
 	}
 
-	/**
-	 * Polyfill for IE support
-	 */
-	Number.isFinite = Number.isFinite || function (value) {
-	  return typeof value === 'number' && isFinite(value)
-	};
+	function uiFieldAddress(field, context) {
+	  var dispatch$1 = dispatch('change');
 
-	Number.isInteger = Number.isInteger || function (val) {
-	  return typeof val === 'number' &&
-	  isFinite(val) &&
-	  Math.floor(val) === val
-	};
+	  var _selection = select(null);
 
-	Number.parseFloat = Number.parseFloat || parseFloat;
+	  var _wrap = select(null);
 
-	Number.isNaN = Number.isNaN || function (value) {
-	  return value !== value // eslint-disable-line
-	};
+	  var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings
 
-	/**
-	 * Polyfill for IE support
-	 */
-	Math.trunc = Math.trunc || function (x) {
-	  return x < 0 ? Math.ceil(x) : Math.floor(x)
-	};
+	  var _entityIDs = [];
 
-	var NumberUtil = function NumberUtil () {};
+	  var _tags;
 
-	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 _countryCode;
 
-	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];
-	  }
-	};
+	  var _addressFormats = [{
+	    format: [['housenumber', 'street'], ['city', 'postcode']]
+	  }];
+	  _mainFileFetcher.get('address_formats').then(function (d) {
+	    _addressFormats = d;
 
-	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 (!_selection.empty()) {
+	      _selection.call(address);
 	    }
-	    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
+	  })["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';
 	    }
-	    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 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;
+	    }
 	  }
-	};
-	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;
+
+	  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');
 	  }
-	};
-	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 updateForCountryCode() {
+	    if (!_countryCode) return;
+	    var addressFormat;
 
-	var CoordinateSequenceFactory = function CoordinateSequenceFactory () {};
+	    for (var i = 0; i < _addressFormats.length; i++) {
+	      var format = _addressFormats[i];
 
-	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
-	};
+	      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
 
-	var Location = function Location () {};
+	        break;
+	      }
+	    }
 
-	var staticAccessors$4 = { INTERIOR: { configurable: true },BOUNDARY: { configurable: true },EXTERIOR: { configurable: true },NONE: { configurable: true } };
+	    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
+	    };
 
-	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 };
+	    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
+	        };
+	      });
+	    }
 
-	Object.defineProperties( Location, staticAccessors$4 );
+	    var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
+	      return d.toString();
+	    });
 
-	var hasInterface = function (o, i) {
-	  return o.interfaces_ && o.interfaces_().indexOf(i) > -1
-	};
+	    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 + '%';
+	    });
 
-	var MathUtil = function MathUtil () {};
+	    function addDropdown(d) {
+	      if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown
 
-	var staticAccessors$5 = { LOG_10: { configurable: true } };
+	      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));
+	      }));
+	    }
 
-	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) };
+	    _wrap.selectAll('input').on('blur', change()).on('change', change());
 
-	Object.defineProperties( MathUtil, staticAccessors$5 );
+	    _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));
 
-	var StringBuffer = function StringBuffer (str) {
-	  this.str = str;
-	};
-	StringBuffer.prototype.append = function append (e) {
-	  this.str += e;
-	};
+	    if (_tags) updateTags(_tags);
+	  }
 
-	StringBuffer.prototype.setCharAt = function setCharAt (i, c) {
-	  this.str = this.str.substr(0, i) + c + this.str.substr(i + 1);
-	};
+	  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();
 
-	StringBuffer.prototype.toString = function toString (e) {
-	  return this.str
-	};
+	    if (extent) {
+	      var countryCode;
 
-	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);
-	  }
-	};
+	      if (context.inIntro()) {
+	        // localize the address format for the walkthrough
+	        countryCode = _t('intro.graph.countrycode');
+	      } else {
+	        var center = extent.center();
+	        countryCode = iso1A2Code(center);
+	      }
 
-	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(); }
+	      if (countryCode) {
+	        _countryCode = countryCode.toLowerCase();
+	        updateForCountryCode();
+	      }
 	    }
-	  } 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 change(onInput) {
+	    return function () {
+	      var tags = {};
+
+	      _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
+
+	        if (Array.isArray(_tags[key]) && !value) return;
+	        tags[key] = value || undefined;
+	      });
+
+	      dispatch$1.call('change', this, tags, onInput);
+	    };
 	  }
-	  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);
+
+	  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);
+	      }
+	    });
 	  }
-	  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)
+
+	  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);
 	  }
-	  var errbound = CGAlgorithmsDD.DP_SAFE_EPSILON * detsum;
-	  if (det >= errbound || -det >= errbound) {
-	    return CGAlgorithmsDD.signum(det)
+
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
 	  }
-	  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 );
+	  address.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return address;
+	  };
 
-	var Exception = function Exception () {};
+	  address.tags = function (tags) {
+	    _tags = tags;
+	    updateTags(tags);
+	  };
 
-	var NotRepresentableException = (function (Exception$$1) {
-	  function NotRepresentableException () {
-	    Exception$$1.call(this, 'Projective point not representable on the Cartesian plane.');
-	  }
+	  address.focus = function () {
+	    var node = _wrap.selectAll('input').node();
 
-	  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 (node) node.focus();
 	  };
 
-	  return NotRepresentableException;
-	}(Exception));
+	  return utilRebind(address, dispatch$1, 'on');
+	}
 
-	var System = function System () {};
+	function uiFieldCycleway(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var items = select(null);
+	  var wrap = select(null);
 
-	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++;
-	  }
-	};
+	  var _tags;
 
-	System.getProperty = function getProperty (name) {
-	  return {
-	    'line.separator': '\n'
-	  }[name]
-	};
+	  function cycleway(selection) {
+	    function stripcolon(s) {
+	      return s.replace(':', '');
+	    }
 
-	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)
-	};
+	    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
 
-	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);
+	    wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
 	  }
-	};
 
-	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)
-	  }
-	};
-	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;
-	    } 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;
-	      }
-	    }
-	  }
-	};
-	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 (y1 < y2) {
-	      this._miny = y1;
-	      this._maxy = y2;
-	    } else {
-	      this._miny = y2;
-	      this._maxy = y1;
-	    }
-	  }
-	};
-	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 };
+	  function change(key) {
+	    var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
 
-	Object.defineProperties( Envelope, staticAccessors$9 );
+	    if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;
 
-	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 (newValue === 'none' || newValue === '') {
+	      newValue = undefined;
+	    }
 
-	/**
-	 * Class for reading and writing Well-Known Text.
-	 *
-	 * NOTE: Adapted from OpenLayers 2.11 implementation.
-	 */
+	    var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
+	    var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
 
-	/** 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]);
+	    if (otherValue && Array.isArray(otherValue)) {
+	      // we must always have an explicit value for comparison
+	      otherValue = otherValue[0];
 	    }
-	  }
 
-	  if (geometry === undefined) { throw new Error('Could not parse WKT ' + wkt) }
+	    if (otherValue === 'none' || otherValue === '') {
+	      otherValue = undefined;
+	    }
 
-	  return geometry
-	};
+	    var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
+	    // sides the same way
 
-	/**
-	 * 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)
-	};
+	    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;
+	    }
 
-	/**
-	 * 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, tag);
 	  }
-	  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
-	  },
 
-	  /**
-	   * 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])
-	  },
+	  cycleway.options = function () {
+	    return Object.keys(field.strings.options).map(function (option) {
+	      return {
+	        title: field.t('options.' + option + '.description'),
+	        value: option
+	      };
+	    });
+	  };
 
-	  /**
-	   * 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;
+	  cycleway.tags = function (tags) {
+	    _tags = tags; // If cycleway is set, use that instead of individual values
 
-	    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]]) + ')');
-	    }
-	    return array.join(',')
-	  },
+	    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 = [];
 
-	  /**
-	   * 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;
+	        if (Array.isArray(tags.cycleway)) {
+	          vals = vals.concat(tags.cycleway);
+	        }
 
-	    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]]));
-	    }
-	    return array.join(',')
-	  },
+	        if (Array.isArray(tags[d])) {
+	          vals = vals.concat(tags[d]);
+	        }
 
-	  linearring: function linearring (linearring$1) {
-	    var this$1 = this;
+	        return vals.filter(Boolean).join('\n');
+	      }
 
-	    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(',')
-	  },
+	      return null;
+	    }).attr('placeholder', function (d) {
+	      if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+	        return _t('inspector.multiple_values');
+	      }
 
-	  /**
-	   * 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;
+	      return field.placeholder();
+	    }).classed('mixed', function (d) {
+	      return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
+	    });
+	  };
 
-	    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(',')
-	  },
+	  cycleway.focus = function () {
+	    var node = wrap.selectAll('input').node();
+	    if (node) node.focus();
+	  };
 
-	  /**
-	   * 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;
+	  return utilRebind(cycleway, dispatch$1, 'on');
+	}
 
-	    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]]) + ')');
-	    }
-	    return array.join(',')
-	  },
+	function uiFieldLanes(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var LANE_WIDTH = 40;
+	  var LANE_HEIGHT = 200;
+	  var _entityIDs = [];
 
-	  /**
-	   * 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;
+	  function lanes(selection) {
+	    var lanesData = context.entity(_entityIDs[0]).lanes();
 
-	    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]]) + ')');
+	    if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
+	      selection.call(lanes.off);
+	      return;
 	    }
-	    return array.join(',')
-	  },
-
-	  /**
-	   * 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;
 
-	    var array = [];
-	    for (var i = 0, len = collection._geometries.length; i < len; ++i) {
-	      array.push(this$1.extractGeometry(collection._geometries[i]));
-	    }
-	    return array.join(',')
+	    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';
+	    });
 	  }
-	};
-
-	/**
-	 * 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()
-	    }
 
-	    var coords = str.trim().split(regExes.spaces);
-	    return this.geometryFactory.createPoint(new Coordinate(Number.parseFloat(coords[0]),
-	      Number.parseFloat(coords[1])))
-	  },
+	  lanes.entityIDs = function (val) {
+	    _entityIDs = val;
+	  };
 
-	  /**
-	   * 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;
+	  lanes.tags = function () {};
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createMultiPoint()
-	    }
+	  lanes.focus = function () {};
 
-	    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)
-	  },
+	  lanes.off = function () {};
 
-	  /**
-	   * 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()
-	    }
+	  return utilRebind(lanes, dispatch$1, 'on');
+	}
+	uiFieldLanes.supportsMultiselection = false;
 
-	    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)
-	  },
+	var _languagesArray = [];
+	function uiFieldLocalized(field, context) {
+	  var dispatch$1 = dispatch('change', 'input');
+	  var wikipedia = services.wikipedia;
+	  var input = select(null);
+	  var localizedInputs = select(null);
 
-	  /**
-	   * 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()
-	    }
+	  var _countryCode;
 
-	    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 _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.
 
-	  /**
-	   * 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;
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createMultiLineString()
-	    }
+	  _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
 
-	    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 langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);
+	  var brandCombo = uiCombobox(context, 'localized-brand').canAutocomplete(false).minItems(1);
 
-	  /**
-	   * 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;
+	  var _selection = select(null);
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createPolygon()
-	    }
+	  var _multilingual = [];
 
-	    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);
-	      }
-	    }
-	    return this.geometryFactory.createPolygon(shell, holes)
-	  },
+	  var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');
 
-	  /**
-	   * 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;
+	  var _wikiTitles;
 
-	    if (str === undefined) {
-	      return this.geometryFactory.createMultiPolygon()
-	    }
+	  var _entityIDs = [];
 
-	    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)
-	  },
+	  function loadLanguagesArray(dataLanguages) {
+	    if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used
 
-	  /**
-	   * 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;
+	    var replacements = {
+	      sr: 'sr-Cyrl',
+	      // in OSM, `sr` implies Cyrillic
+	      'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM
 
-	    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]));
+	    for (var code in dataLanguages) {
+	      if (replacements[code] === false) continue;
+	      var metaCode = code;
+	      if (replacements[code]) metaCode = replacements[code];
+
+	      _languagesArray.push({
+	        localName: _mainLocalizer.languageName(metaCode, {
+	          localOnly: true
+	        }),
+	        nativeName: dataLanguages[metaCode].nativeName,
+	        code: code,
+	        label: _mainLocalizer.languageName(metaCode)
+	      });
 	    }
-	    return this.geometryFactory.createGeometryCollection(components)
 	  }
-	};
 
-	/**
-	 * 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.
-	 */
+	  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;
 
-	/**
-	 * @param {GeometryFactory} geometryFactory
-	 * @constructor
-	 */
-	var WKTWriter = function WKTWriter (geometryFactory) {
-	  this.parser = new WKTParser(geometryFactory);
-	};
+	      var original = context.graph().base().entities[_entityIDs[0]];
 
-	/**
-	 * 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 + ' )'
-	};
+	      var hasOriginalName = original && entity.tags.name && entity.tags.name === original.tags.name; // if the name was already edited manually then allow further editing
 
-	var RuntimeException = (function (Error) {
-	  function RuntimeException (message) {
-	    Error.call(this, message);
-	    this.name = 'RuntimeException';
-	    this.message = message;
-	    this.stack = (new Error()).stack;
-	  }
+	      if (!hasOriginalName) return false; // features linked to Wikidata are likely important and should be protected
 
-	  if ( Error ) { RuntimeException.__proto__ = Error; }
-	  RuntimeException.prototype = Object.create( Error && Error.prototype );
-	  RuntimeException.prototype.constructor = RuntimeException;
+	      if (entity.tags.wikidata) return true; // assume the name has already been confirmed if its source has been researched
 
-	  return RuntimeException;
-	}(Error));
+	      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
 
-	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);
-	    }
-	  }
+	      return isSuggestion && !showsBrand;
+	    });
 
-	  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 []
-	  };
-	  AssertionFailedException.prototype.getClass = function getClass () {
-	    return AssertionFailedException
-	  };
+	    field.locked(isLocked);
+	  } // update _multilingual, maintaining the existing order
 
-	  return AssertionFailedException;
-	}(RuntimeException));
 
-	var Assert = function Assert () {};
+	  function calcMultilingual(tags) {
+	    var existingLangsOrdered = _multilingual.map(function (item) {
+	      return item.lang;
+	    });
 
-	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)
-	      }
-	    }
-	  }
-	};
-	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 : ''))
-	    }
-	  }
-	};
+	    var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
 
-	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;
-	};
+	    for (var k in tags) {
+	      var m = k.match(/^(.*):([a-zA-Z_-]+)$/);
 
-	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;
-	    }
-	  }
-	};
-	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 (m && m[1] === field.key && m[2]) {
+	        var item = {
+	          lang: m[2],
+	          value: tags[k]
+	        };
 
-	  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
+	        if (existingLangs.has(item.lang)) {
+	          // update the value
+	          _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
+	          existingLangs["delete"](item.lang);
+	        } else {
+	          _multilingual.push(item);
+	        }
 	      }
 	    }
-	    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 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);
-	    }
+	    _multilingual = _multilingual.filter(function (item) {
+	      return !item.lang || !existingLangs.has(item.lang);
+	    });
 	  }
-	  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 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));
+	        }
 	      }
-	    } 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
-	  };
-	  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;
+
+	    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);
+
+	    if (_tags && !_multilingual.length) {
+	      calcMultilingual(_tags);
 	    }
-	    return nearestPt
-	  };
 
-	  return RobustLineIntersector;
-	}(LineIntersector));
+	    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.
 
-	var RobustDeterminant = function RobustDeterminant () {};
+	    function checkBrandOnBlur() {
+	      var latest = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+	      if (!latest) return; // deleting the entity blurred the field?
 
-	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
+	      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 {
-	        return -sign
+	        cancelBrand();
 	      }
 	    }
-	  }
-	  if (y1 === 0.0 || x2 === 0.0) {
-	    if (y2 > 0) {
-	      if (x1 > 0) {
-	        return sign
-	      } else {
-	        return -sign
+
+	    function acceptBrand(d) {
+	      var entity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+
+	      if (!d || !entity) {
+	        cancelBrand();
+	        return;
 	      }
-	    } else {
-	      if (x1 > 0) {
-	        return -sign
-	      } else {
-	        return sign
+
+	      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);
+	    } // user hit escape
+
+
+	    function cancelBrand() {
+	      var name = utilGetSetValue(input);
+	      dispatch$1.call('change', this, {
+	        name: name
+	      });
 	    }
-	  }
-	  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;
-	      }
+
+	    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 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;
+	          });
+	        }
+
+	        results = results.slice(0, 10);
+	        callback(results);
+	      };
 	    }
-	  } 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;
-	      }
-	    } 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;
+
+	    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;
+	        });
 	      }
-	    }
-	  }
-	  if (x1 > 0.0) {
-	    if (x2 > 0.0) {
-	      if (x1 <= x2) ; else {
-	        return sign
+
+	      if (!langExists) {
+	        // prepend the value so it appears at the top
+	        _multilingual.unshift({
+	          lang: defaultLang,
+	          value: ''
+	        });
+
+	        localizedInputs.call(renderMultilingual);
 	      }
-	    } else {
-	      return sign
 	    }
-	  } else {
-	    if (x2 > 0.0) {
-	      return -sign
-	    } else {
-	      if (x1 >= x2) {
-	        sign = -sign;
-	        x1 = -x1;
-	        x2 = -x2;
-	      } else {
-	        return -sign
-	      }
+
+	    function change(onInput) {
+	      return function (d3_event) {
+	        if (field.locked()) {
+	          d3_event.preventDefault();
+	          return;
+	        }
+
+	        var val = utilGetSetValue(select(this));
+	        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);
+	      };
 	    }
 	  }
-	  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;
-	      }
-	    }
-	    if (y2 === 0.0) {
-	      if (x2 === 0.0) {
-	        return 0
-	      } else {
-	        return -sign
-	      }
-	    }
-	    if (x2 === 0.0) {
-	      return sign
-	    }
-	    k = Math.floor(x1 / x2);
-	    x1 = x1 - k * x2;
-	    y1 = y1 - k * y2;
-	    if (y1 < 0.0) {
-	      return sign
-	    }
-	    if (y1 > y2) {
-	      return -sign
-	    }
-	    if (x2 > x1 + x1) {
-	      if (y2 < y1 + y1) {
-	        return -sign
-	      }
-	    } else {
-	      if (y2 > y1 + y1) {
-	        return sign
-	      } else {
-	        x1 = x2 - x1;
-	        y1 = y2 - y1;
-	        sign = -sign;
-	      }
-	    }
-	    if (y1 === 0.0) {
-	      if (x1 === 0.0) {
-	        return 0
-	      } else {
-	        return sign
-	      }
+
+	  function key(lang) {
+	    return field.key + ':' + lang;
+	  }
+
+	  function changeLang(d3_event, d) {
+	    var tags = {}; // make sure unrecognized suffixes are lowercase - #7156
+
+	    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;
 	    }
-	    if (x1 === 0.0) {
-	      return -sign
+
+	    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);
 	  }
-	};
 
-	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++;
-	    }
+	  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);
 	  }
-	};
-	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
+
+	  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 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 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);
+	    });
 	  }
-	};
 
-	var CGAlgorithms = function CGAlgorithms () {};
+	  localized.tags = function (tags) {
+	    _tags = tags; // Fetch translations from wikipedia
 
-	var staticAccessors$3 = { CLOCKWISE: { configurable: true },RIGHT: { configurable: true },COUNTERCLOCKWISE: { configurable: true },LEFT: { configurable: true },COLLINEAR: { configurable: true },STRAIGHT: { configurable: true } };
+	    if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
+	      _wikiTitles = {};
+	      var wm = tags.wikipedia.match(/([^:]+):(.+)/);
 
-	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
-	  }
-	};
-	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;
+	      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();
 	  }
-	  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;
-	  }
-	  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)
-	  }
-	};
-	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 );
+	  return utilRebind(localized, dispatch$1, 'on');
+	}
 
-	var GeometryComponentFilter = function GeometryComponentFilter () {};
+	function uiFieldMaxspeed(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var unitInput = select(null);
+	  var input = select(null);
+	  var _entityIDs = [];
 
-	GeometryComponentFilter.prototype.filter = function filter (geom) {};
-	GeometryComponentFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryComponentFilter.prototype.getClass = function getClass () {
-	  return GeometryComponentFilter
-	};
+	  var _tags;
 
-	var Geometry = function Geometry () {
-	  var factory = arguments[0];
+	  var _isImperial;
 
-	  this._envelope = null;
-	  this._factory = null;
-	  this._SRID = null;
-	  this._userData = null;
-	  this._factory = factory;
-	  this._SRID = factory.getSRID();
-	};
+	  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];
 
-	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
-	    }
-	    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();
-	  }
-	  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 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();
 	    }
 	  }
-	  if (i.hasNext()) {
-	    return 1
-	  }
-	  if (j.hasNext()) {
-	    return -1
+
+	  function setUnitSuggestions() {
+	    speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
+	    utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
 	  }
-	  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
+
+	  function comboValues(d) {
+	    return {
+	      value: d.toString(),
+	      title: d.toString()
+	    };
 	  }
-	  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
+
+	  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 false
-	};
-	Geometry.hasNullElements = function hasNullElements (array) {
-	  for (var i = 0; i < array.length; i++) {
-	    if (array[i] === null) {
-	      return true
+
+	  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;
+	      }
 	    }
-	  }
-	  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 () {};
+	    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);
+	  };
 
-	CoordinateFilter.prototype.filter = function filter (coord) {};
-	CoordinateFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	CoordinateFilter.prototype.getClass = function getClass () {
-	  return CoordinateFilter
-	};
+	  maxspeed.focus = function () {
+	    input.node().focus();
+	  };
 
-	var BoundaryNodeRule = function BoundaryNodeRule () {};
+	  maxspeed.entityIDs = function (val) {
+	    _entityIDs = val;
+	  };
 
-	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 } };
+	  function combinedEntityExtent() {
+	    return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+	  }
 
-	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
-	};
+	  return utilRebind(maxspeed, dispatch$1, 'on');
+	}
 
-	var EndPointBoundaryNodeRule = function EndPointBoundaryNodeRule () {};
+	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);
+	      }
 
-	EndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount > 0
-	};
-	EndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	EndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-	  return EndPointBoundaryNodeRule
-	};
+	      typeField.tags(tags);
+	    } else {
+	      typeField = null;
+	    }
 
-	var MultiValentEndPointBoundaryNodeRule = function MultiValentEndPointBoundaryNodeRule () {};
+	    var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
+	      return d.id;
+	    }); // Exit
 
-	MultiValentEndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount > 1
-	};
-	MultiValentEndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	MultiValentEndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-	  return MultiValentEndPointBoundaryNodeRule
-	};
+	    typeItem.exit().remove(); // Enter
 
-	var MonoValentEndPointBoundaryNodeRule = function MonoValentEndPointBoundaryNodeRule () {};
+	    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
 
-	MonoValentEndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-	  return boundaryCount === 1
-	};
-	MonoValentEndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-	  return [BoundaryNodeRule]
-	};
-	MonoValentEndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-	  return MonoValentEndPointBoundaryNodeRule
-	};
+	    typeItem = typeItem.merge(typeEnter);
 
-	// import Iterator from './Iterator'
+	    if (typeField) {
+	      typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
+	    } // Layer
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Collection.html
-	 *
-	 * @constructor
-	 * @private
-	 */
-	var Collection = function Collection () {};
 
-	Collection.prototype.add = function add () {};
+	    if (layer && showLayer) {
+	      if (!layerField) {
+	        layerField = uiField(context, layer, _entityIDs, {
+	          wrap: false
+	        }).on('change', changeLayer);
+	      }
 
-	/**
-	 * 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 () {};
+	      layerField.tags(tags);
+	      field.keys = utilArrayUnion(field.keys, ['layer']);
+	    } else {
+	      layerField = null;
+	      field.keys = field.keys.filter(function (k) {
+	        return k !== 'layer';
+	      });
+	    }
 
-	/**
-	 * Returns true if this collection contains no elements.
-	 * @return {boolean}
-	 */
-	Collection.prototype.isEmpty = function isEmpty () {};
+	    var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit
 
-	/**
-	 * Returns an iterator over the elements in this collection.
-	 * @return {javascript.util.Iterator}
-	 */
-	Collection.prototype.iterator = function iterator () {};
+	    layerItem.exit().remove(); // Enter
 
-	/**
-	 * Returns an iterator over the elements in this collection.
-	 * @return {number}
-	 */
-	Collection.prototype.size = function size () {};
+	    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
 
-	/**
-	 * Returns an array containing all of the elements in this collection.
-	 * @return {Array}
-	 */
-	Collection.prototype.toArray = function toArray () {};
+	    layerItem = layerItem.merge(layerEnter);
 
-	/**
-	 * 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 () {};
+	    if (layerField) {
+	      layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
+	    }
+	  }
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function IndexOutOfBoundsException (message) {
-	  this.message = message || '';
-	}
-	IndexOutOfBoundsException.prototype = new Error();
+	  function changeType(t, onInput) {
+	    var key = selectedKey();
+	    if (!key) return;
+	    var val = t[key];
 
-	/**
-	 * @type {string}
-	 */
-	IndexOutOfBoundsException.prototype.name = 'IndexOutOfBoundsException';
+	    if (val !== 'no') {
+	      _oldType[key] = val;
+	    }
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Iterator.html
-	 * @constructor
-	 * @private
-	 */
-	var Iterator$1 = function Iterator () {};
+	    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
 
-	Iterator$1.prototype.hasNext = function hasNext () {};
 
-	/**
-	 * Returns the next element in the iteration.
-	 * @return {Object}
-	 */
-	Iterator$1.prototype.next = function next () {};
+	      if (t.layer === undefined) {
+	        if (key === 'bridge' && val !== 'no') {
+	          t.layer = '1';
+	        }
 
-	/**
-	 * Removes from the underlying collection the last element returned by the
-	 * iterator (optional operation).
-	 */
-	Iterator$1.prototype.remove = function remove () {};
+	        if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
+	          t.layer = '-1';
+	        }
+	      }
+	    }
 
-	/**
-	 * @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);
+	    dispatch$1.call('change', this, t, onInput);
 	  }
 
-	  if ( Collection$$1 ) { List.__proto__ = Collection$$1; }
-	  List.prototype = Object.create( Collection$$1 && Collection$$1.prototype );
-	  List.prototype.constructor = List;
-
-	  List.prototype.get = function get () { };
-
-	  /**
-	   * 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 () { };
-
-	  /**
-	   * Returns true if this collection contains no elements.
-	   * @return {boolean}
-	   */
-	  List.prototype.isEmpty = function isEmpty () { };
+	  function changeLayer(t, onInput) {
+	    if (t.layer === '0') {
+	      t.layer = undefined;
+	    }
 
-	  return List;
-	}(Collection));
+	    dispatch$1.call('change', this, t, onInput);
+	  }
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function NoSuchElementException (message) {
-	  this.message = message || '';
-	}
-	NoSuchElementException.prototype = new Error();
+	  function changeRadio() {
+	    var t = {};
+	    var activeKey;
 
-	/**
-	 * @type {string}
-	 */
-	NoSuchElementException.prototype.name = 'NoSuchElementException';
+	    if (field.key) {
+	      t[field.key] = undefined;
+	    }
 
-	// import OperationNotSupported from './OperationNotSupported'
+	    radios.each(function (d) {
+	      var active = select(this).property('checked');
+	      if (active) activeKey = d;
 
-	/**
-	 * @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_ = [];
+	      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 ( List$$1 ) { ArrayList.__proto__ = List$$1; }
-	  ArrayList.prototype = Object.create( List$$1 && List$$1.prototype );
-	  ArrayList.prototype.constructor = ArrayList;
+	  radio.tags = function (tags) {
+	    radios.property('checked', function (d) {
+	      if (field.key) {
+	        return tags[field.key] === d;
+	      }
 
-	  ArrayList.prototype.ensureCapacity = function ensureCapacity () {};
-	  ArrayList.prototype.interfaces_ = function interfaces_ () { return [List$$1, Collection] };
+	      return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
+	    });
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.add = function add (e) {
-	    if (arguments.length === 1) {
-	      this.array_.push(e);
-	    } else {
-	      this.array_.splice(arguments[0], arguments[1]);
+	    function isMixed(d) {
+	      if (field.key) {
+	        return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
+	      }
+
+	      return Array.isArray(tags[d]);
 	    }
-	    return true
-	  };
 
-	  ArrayList.prototype.clear = function clear () {
-	    this.array_ = [];
-	  };
+	    labels.classed('active', function (d) {
+	      if (field.key) {
+	        return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
+	      }
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.addAll = function addAll (c) {
-	    var this$1 = this;
+	      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;
+	    });
 
-	    for (var i = c.iterator(); i.hasNext();) {
-	      this$1.add(i.next());
+	    if (selection.empty()) {
+	      placeholder.html(_t.html('inspector.none'));
+	    } else {
+	      placeholder.html(selection.attr('value'));
+	      _oldType[selection.datum()] = tags[selection.datum()];
 	    }
-	    return true
-	  };
-
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.set = function set (index, element) {
-	    var oldElement = this.array_[index];
-	    this.array_[index] = element;
-	    return oldElement
-	  };
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.iterator = function iterator () {
-	    return new Iterator_(this)
-	  };
+	    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';
+	      }
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.get = function get (index) {
-	    if (index < 0 || index >= this.size()) {
-	      throw new IndexOutOfBoundsException()
+	      wrap.call(structureExtras, tags);
 	    }
-
-	    return this.array_[index]
 	  };
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.isEmpty = function isEmpty () {
-	    return this.array_.length === 0
+	  radio.focus = function () {
+	    radios.node().focus();
 	  };
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.size = function size () {
-	    return this.array_.length
+	  radio.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _oldType = {};
+	    return radio;
 	  };
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.toArray = function toArray () {
-	    var this$1 = this;
-
-	    var array = [];
+	  radio.isAllowed = function () {
+	    return _entityIDs.length === 1;
+	  };
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      array.push(this$1.array_[i]);
-	    }
+	  return utilRebind(radio, dispatch$1, 'on');
+	}
 
-	    return array
-	  };
+	function uiFieldRestrictions(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var breathe = behaviorBreathe();
+	  corePreferences('turn-restriction-via-way', null); // remove old key
 
-	  /**
-	   * @override
-	   */
-	  ArrayList.prototype.remove = function remove (o) {
-	    var this$1 = this;
+	  var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922
 
-	    var found = false;
+	  var storedDistance = corePreferences('turn-restriction-distance');
 
-	    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 _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;
 
-	    return found
-	  };
+	  var _maxDistance = storedDistance ? +storedDistance : 30;
 
-	  return ArrayList;
-	}(List));
+	  var _initialized = false;
 
-	/**
-	 * @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 _parent = select(null); // the entire field
 
-	  if ( Iterator$$1 ) { Iterator_.__proto__ = Iterator$$1; }
-	  Iterator_.prototype = Object.create( Iterator$$1 && Iterator$$1.prototype );
-	  Iterator_.prototype.constructor = Iterator_;
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.next = function next () {
-	    if (this.position_ === this.arrayList_.size()) {
-	      throw new NoSuchElementException()
-	    }
-	    return this.arrayList_.get(this.position_++)
-	  };
+	  var _container = select(null); // just the map
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.hasNext = function hasNext () {
-	    if (this.position_ < this.arrayList_.size()) {
-	      return true
-	    } else {
-	      return false
-	    }
-	  };
 
-	  /**
-	   * TODO: should be in ListIterator
-	   * @override
-	   */
-	  Iterator_.prototype.set = function set (element) {
-	    return this.arrayList_.set(this.position_ - 1, element)
-	  };
+	  var _oldTurns;
 
-	  /**
-	   * @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 }
-	            }
-	          }
-	        }
-	        ArrayList$$1.prototype.add.call(this, i$3, coord$4);
-	      }
-	    } 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);
-	      }
-	      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
-	  };
+	  var _graph;
 
-	  Object.defineProperties( CoordinateList, staticAccessors );
+	  var _vertexID;
 
-	  return CoordinateList;
-	}(ArrayList));
+	  var _intersection;
 
-	var CoordinateArrays = function CoordinateArrays () {};
+	  var _fromWayID;
 
-	var staticAccessors$13 = { ForwardComparator: { configurable: true },BidirectionalComparator: { configurable: true },coordArrayType: { configurable: true } };
+	  var _lastXPos;
 
-	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 restrictions(selection) {
+	    _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed
 
-	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
-	  }
-	};
-	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); }
-	  }
-	  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
-	    }
-	  }
-	  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;
-	  }
-	};
-	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]);
-	    }
-	  }
-	};
-	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]);
-	  }
-	  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 -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 }
-	  }
-	  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++;
-	  }
-	  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];
+	    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); // 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;
 	    }
+
+	    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 containerEnter = container.enter().append('div').attr('class', 'restriction-container');
+	    containerEnter.append('div').attr('class', 'restriction-help'); // update
+
+	    _container = containerEnter.merge(container).call(renderViewer);
+	    var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update
+
+	    controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
 	  }
-	  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 );
+	  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
 
-	var ForwardComparator = function ForwardComparator () {};
+	    selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
+	      var val = select(this).property('value');
+	      _maxDistance = +val;
+	      _intersection = null;
 
-	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
-	};
+	      _container.selectAll('.layer-osm .layer-turns *').remove();
 
-	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
-	};
+	      corePreferences('turn-restriction-distance', _maxDistance);
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Map.html
-	 *
-	 * @constructor
-	 * @private
-	 */
-	var Map$1$1 = function Map () {};
+	      _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
 
-	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 () {};
+	    selection.selectAll('.restriction-via-way-input').property('value', _maxViaWay).on('input', function () {
+	      var val = select(this).property('value');
+	      _maxViaWay = +val;
 
-	/**
-	 * Returns the number of key-value mappings in this map.
-	 * @return {number}
-	 */
-	Map$1$1.prototype.size = function size () {};
+	      _container.selectAll('.layer-osm .layer-turns *').remove();
 
-	/**
-	 * Returns a Collection view of the values contained in this map.
-	 * @return {javascript.util.Collection}
-	 */
-	Map$1$1.prototype.values = function values () {};
+	      corePreferences('turn-restriction-via-way0', _maxViaWay);
 
-	/**
-	 * 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 () {};
+	      _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
 
-	/**
-	 * @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;
+	    var extent = geoExtent();
 
-		
+	    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
 
-		return SortedMap;
-	}(Map$1$1));
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function OperationNotSupported (message) {
-	  this.message = message || '';
-	}
-	OperationNotSupported.prototype = new Error();
+	    if (_intersection.vertices.length > 1) {
+	      var padding = 180; // in z22 pixels
 
-	/**
-	 * @type {string}
-	 */
-	OperationNotSupported.prototype.name = 'OperationNotSupported';
+	      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));
+	    }
 
-	/**
-	 * @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();
+	    var padTop = 35; // reserve top space for hint text
 
+	    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);
 
-	/**
-	 * 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() {};
+	    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.
 
-	/**
-	 * @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 (arguments[0] instanceof Collection) {
-	      this.addAll(arguments[0]);
+	    if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
+	      _fromWayID = null;
+	      _oldTurns = null;
 	    }
-	  }
 
-	  if ( Set$$1 ) { HashSet.__proto__ = Set$$1; }
-	  HashSet.prototype = Object.create( Set$$1 && Set$$1.prototype );
-	  HashSet.prototype.constructor = HashSet;
+	    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
-	   */
-	  HashSet.prototype.contains = function contains (o) {
-	    var this$1 = this;
+	    if (_fromWayID) {
+	      way = vgraph.entity(_fromWayID);
+	      surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+	    }
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      var e = this$1.array_[i];
-	      if (e === o) {
-	        return true
+	    document.addEventListener('resizeWindow', function () {
+	      utilSetDimensions(_container, null);
+	      redraw(1);
+	    }, false);
+	    updateHints(null);
+
+	    function click(d3_event) {
+	      surface.call(breathe.off).call(breathe);
+	      var datum = d3_event.target.__data__;
+	      var entity = datum && datum.properties && datum.properties.entity;
+
+	      if (entity) {
+	        datum = entity;
 	      }
-	    }
-	    return false
-	  };
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.add = function add (o) {
-	    if (this.contains(o)) {
-	      return false
-	    }
+	      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);
 
-	    this.array_.push(o);
+	        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
 
-	    return true
-	  };
+	          datumOnly.only = true; // but change this property
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.addAll = function addAll (c) {
-	    var this$1 = this;
+	          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.
 
-	    for (var i = c.iterator(); i.hasNext();) {
-	      this$1.add(i.next());
-	    }
-	    return true
-	  };
+	          turns = _intersection.turns(_fromWayID, 2);
+	          extraActions = [];
+	          _oldTurns = [];
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.remove = function remove (o) {
-	    // throw new javascript.util.OperationNotSupported()
-	    throw new Error()
-	  };
+	          for (i = 0; i < turns.length; i++) {
+	            var turn = turns[i];
+	            if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.size = function size () {
-	    return this.array_.length
-	  };
+	            if (turn.direct && turn.path[1] === datum.path[1]) {
+	              seen[turns[i].restrictionID] = true;
+	              turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.isEmpty = function isEmpty () {
-	    return this.array_.length === 0
-	  };
+	              _oldTurns.push(turn);
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.toArray = function toArray () {
-	    var this$1 = this;
+	              extraActions.push(actionUnrestrictTurn(turn));
+	            }
+	          }
 
-	    var array = [];
+	          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));
+	            }
+	          }
 
-	    for (var i = 0, len = this.array_.length; i < len; i++) {
-	      array.push(this$1.array_[i]);
+	          _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 s = surface.selectAll('.' + datum.key);
+	        datum = s.empty() ? null : s.datum();
+	        updateHints(datum);
+	      } else {
+	        _fromWayID = null;
+	        _oldTurns = null;
+	        redraw();
+	      }
 	    }
 
-	    return array
-	  };
+	    function mouseover(d3_event) {
+	      var datum = d3_event.target.__data__;
+	      updateHints(datum);
+	    }
 
-	  /**
-	   * @override
-	   */
-	  HashSet.prototype.iterator = function iterator () {
-	    return new Iterator_$1(this)
-	  };
+	    _lastXPos = _lastXPos || sdims[0];
 
-	  return HashSet;
-	}(Set$2));
+	    function redraw(minChange) {
+	      var xPos = -1;
 
-	/**
-	   * @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;
-	  }
+	      if (minChange) {
+	        xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
+	      }
 
-	  if ( Iterator$$1 ) { Iterator_.__proto__ = Iterator$$1; }
-	  Iterator_.prototype = Object.create( Iterator$$1 && Iterator$$1.prototype );
-	  Iterator_.prototype.constructor = Iterator_;
+	      if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
+	        if (context.hasEntity(_vertexID)) {
+	          _lastXPos = xPos;
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.next = function next () {
-	    if (this.position_ === this.hashSet_.size()) {
-	      throw new NoSuchElementException()
+	          _container.call(renderViewer);
+	        }
+	      }
 	    }
-	    return this.hashSet_.array_[this.position_++]
-	  };
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.hasNext = function hasNext () {
-	    if (this.position_ < this.hashSet_.size()) {
-	      return true
-	    } else {
-	      return false
+	    function highlightPathsFrom(wayID) {
+	      surface.selectAll('.related').classed('related', false).classed('allow', false).classed('restrict', false).classed('only', false);
+	      surface.selectAll('.' + wayID).classed('related', true);
+
+	      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';
+
+	          if (turn.only || turns.length === 1) {
+	            if (turn.via.ways) {
+	              ids = ids.concat(turn.via.ways);
+	            }
+	          } else if (turn.to.way === wayID) {
+	            continue;
+	          }
+
+	          surface.selectAll(utilEntitySelector(ids)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only');
+	        }
+	      }
 	    }
-	  };
 
-	  /**
-	   * @override
-	   */
-	  Iterator_.prototype.remove = function remove () {
-	    throw new OperationNotSupported()
-	  };
+	    function updateHints(datum) {
+	      var help = _container.selectAll('.restriction-help').html('');
 
-	  return Iterator_;
-	}(Iterator$1));
+	      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;
 
-	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) }
+	      if (entity) {
+	        datum = entity;
+	      }
 
-	/**
-	 * @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();
+	      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: ''
+	          });
+	        }
 
-	/**
-	 * @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
-	};
+	        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)
+	        }));
 
-	/**
-	 * @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
-	};
+	        if (datum.via.ways && datum.via.ways.length) {
+	          var names = [];
 
-	/**
-	 * @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);
+	          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(', ')
+	          }));
 	        }
-	        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));
+
+	        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 {
-	        if (x === leftOf(parentOf(x))) {
-	          x = parentOf(x);
-	          this$1.rotateRight(x);
+	        highlightPathsFrom(null);
+
+	        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
+	          }));
 	        }
-	        setColor(parentOf(x), BLACK);
-	        setColor(parentOf(parentOf(x)), RED);
-	        this$1.rotateLeft(parentOf(parentOf(x)));
 	      }
 	    }
 	  }
-	  this.root_.color = BLACK;
-	};
 
-	/**
-	 * @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 displayMaxDistance(maxDist) {
+	    var isImperial = !_mainLocalizer.usesMetric();
+	    var opts;
 
-	/**
-	 * @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);
+	    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
+	        })
+	      };
 	    }
-	  }
-	  return hashSet
-	};
 
-	/**
-	 * @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;
+	    return _t.html('restriction.controls.distance_up_to', opts);
 	  }
-	};
 
-	/**
-	 * @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;
+	  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');
 	  }
-	};
 
-	/**
-	 * @return {Object}
-	 */
-	TreeMap.prototype.getFirstEntry = function () {
-	  var p = this.root_;
-	  if (p != null) {
-	    while (p.left != null) {
-	      p = p.left;
-	    }
+	  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;
 	  }
-	  return p
-	};
 
-	/**
-	 * @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;
-	    }
-	    return p$1
-	  }
-	};
+	  restrictions.entityIDs = function (val) {
+	    _intersection = null;
+	    _fromWayID = null;
+	    _oldTurns = null;
+	    _vertexID = val[0];
+	  };
 
-	/**
-	 * @override
-	 */
-	TreeMap.prototype.size = function () {
-	  return this.size_
-	};
+	  restrictions.tags = function () {};
 
-	var Lineal = function Lineal () {};
+	  restrictions.focus = function () {};
 
-	Lineal.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Lineal.prototype.getClass = function getClass () {
-	  return Lineal
-	};
+	  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);
+	  };
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/SortedSet.html
-	 *
-	 * @extends {Set}
-	 * @constructor
-	 * @private
-	 */
-	function SortedSet () {}
-	SortedSet.prototype = new Set$2();
+	  return utilRebind(restrictions, dispatch$1, 'on');
+	}
+	uiFieldRestrictions.supportsMultiselection = false;
 
-	// 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 uiFieldTextarea(field, context) {
+	  var dispatch$1 = dispatch('change');
+	  var input = select(null);
+
+	  var _tags;
 
-	  if (arguments[0] instanceof Collection) {
-	    this.addAll(arguments[0]);
+	  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);
 	  }
-	}
-	TreeSet.prototype = new SortedSet();
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.contains = function (o) {
-	  var this$1 = this;
+	  function change(onInput) {
+	    return function () {
+	      var val = utilGetSetValue(input);
+	      if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    var e = this$1.array_[i];
-	    if (e['compareTo'](o) === 0) {
-	      return true
-	    }
+	      if (!val && Array.isArray(_tags[field.key])) return;
+	      var t = {};
+	      t[field.key] = val || undefined;
+	      dispatch$1.call('change', this, t, onInput);
+	    };
 	  }
-	  return false
-	};
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.add = function (o) {
-	  var this$1 = this;
+	  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);
+	  };
+
+	  textarea.focus = function () {
+	    input.node().focus();
+	  };
+
+	  return utilRebind(textarea, dispatch$1, 'on');
+	}
+
+	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];
+
+	  var combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(true).minItems(1);
+
+	  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
 
-	  if (this.contains(o)) {
-	    return false
+	    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');
+	    });
 	  }
 
-	  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
+	  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;
+	        }
+	      }
 	    }
+
+	    wikidata.itemsForSearchQuery(q, function (err, data) {
+	      if (err) return;
+
+	      for (var i in data) {
+	        data[i].value = data[i].label + ' (' + data[i].id + ')';
+	        data[i].title = data[i].description;
+	      }
+
+	      if (callback) callback(data);
+	    });
 	  }
 
-	  this.array_.push(o);
+	  function change() {
+	    var syncTags = {};
+	    syncTags[field.key] = _qid;
+	    dispatch$1.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..
 
-	  return true
-	};
+	    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.
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.addAll = function (c) {
-	  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
 
-	  for (var i = c.iterator(); i.hasNext();) {
-	    this$1.add(i.next());
-	  }
-	  return true
-	};
+	      ['labels', 'descriptions'].forEach(function (key) {
+	        if (!entity[key]) return;
+	        var valueLangs = Object.keys(entity[key]);
+	        if (valueLangs.length === 0) return;
+	        var valueLang = valueLangs[0];
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.remove = function (e) {
-	  throw new OperationNotSupported()
-	};
+	        if (langs.indexOf(valueLang) === -1) {
+	          langs.push(valueLang);
+	        }
+	      });
+	      var newWikipediaValue;
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.size = function () {
-	  return this.array_.length
-	};
+	      if (_wikipediaKey) {
+	        var foundPreferred;
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.isEmpty = function () {
-	  return this.array_.length === 0
-	};
+	        for (var i in langs) {
+	          var lang = langs[i];
+	          var siteID = lang.replace('-', '_') + 'wiki';
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.toArray = function () {
-	  var this$1 = this;
+	          if (entity.sitelinks[siteID]) {
+	            foundPreferred = true;
+	            newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match
 
-	  var array = [];
+	            break;
+	          }
+	        }
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    array.push(this$1.array_[i]);
-	  }
+	        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');
+	          });
 
-	  return array
-	};
+	          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;
+	          }
+	        }
+	      }
 
-	/**
-	 * @override
-	 */
-	TreeSet.prototype.iterator = function () {
-	  return new Iterator_$2(this)
-	};
+	      if (newWikipediaValue) {
+	        newWikipediaValue = context.cleanTagValue(newWikipediaValue);
+	      }
 
-	/**
-	 * @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;
-	};
+	      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
 
-	/**
-	 * @override
-	 */
-	Iterator_$2.prototype.next = function () {
-	  if (this.position_ === this.treeSet_.size()) {
-	    throw new NoSuchElementException()
-	  }
-	  return this.treeSet_.array_[this.position_++]
-	};
+	        if (newWikipediaValue === null) {
+	          if (!currTags[_wikipediaKey]) return null;
+	          delete currTags[_wikipediaKey];
+	        } else {
+	          currTags[_wikipediaKey] = newWikipediaValue;
+	        }
 
-	/**
-	 * @override
-	 */
-	Iterator_$2.prototype.hasNext = function () {
-	  if (this.position_ < this.treeSet_.size()) {
-	    return true
-	  } else {
-	    return false
+	        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
+	    });
 	  }
-	};
 
-	/**
-	 * @override
-	 */
-	Iterator_$2.prototype.remove = function () {
-	  throw new OperationNotSupported()
-	};
+	  function setLabelForEntity() {
+	    var label = '';
 
-	/**
-	 * @see http://download.oracle.com/javase/6/docs/api/java/util/Arrays.html
-	 *
-	 * @constructor
-	 * @private
-	 */
-	var Arrays = function Arrays () {};
+	    if (_wikidataEntity) {
+	      label = entityPropertyForDisplay(_wikidataEntity, 'labels');
 
-	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]);
+	      if (label.length === 0) {
+	        label = _wikidataEntity.id.toString();
+	      }
 	    }
+
+	    utilGetSetValue(_searchInput, label);
 	  }
-	};
-	/**
-	 * @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
-	};
 
-	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)
-	};
+	  wiki.tags = function (tags) {
+	    var isMixed = Array.isArray(tags[field.key]);
 
-	Object.defineProperties( Dimension, staticAccessors$14 );
+	    _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);
 
-	var GeometryFilter = function GeometryFilter () {};
+	    _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
 
-	GeometryFilter.prototype.filter = function filter (geom) {};
-	GeometryFilter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryFilter.prototype.getClass = function getClass () {
-	  return GeometryFilter
-	};
+	    if (!/^Q[0-9]*$/.test(_qid)) {
+	      // not a proper QID
+	      unrecognized();
+	      return;
+	    } // QID value in correct format
 
-	var CoordinateSequenceFilter = function CoordinateSequenceFilter () {};
 
-	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
-	};
+	    _wikiURL = 'https://wikidata.org/wiki/' + _qid;
+	    wikidata.entityByQID(_qid, function (err, entity) {
+	      if (err) {
+	        unrecognized();
+	        return;
+	      }
 
-	var GeometryCollection = (function (Geometry$$1) {
-	  function GeometryCollection (geometries, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._geometries = geometries || [];
+	      _wikidataEntity = entity;
+	      setLabelForEntity();
+	      var description = entityPropertyForDisplay(entity, 'descriptions');
 
-	    if (Geometry$$1.hasNullElements(this._geometries)) {
-	      throw new IllegalArgumentException('geometries must not contain null elements')
-	    }
-	  }
+	      _selection.select('button.wiki-link').classed('disabled', false);
 
-	  if ( Geometry$$1 ) { GeometryCollection.__proto__ = Geometry$$1; }
-	  GeometryCollection.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  GeometryCollection.prototype.constructor = GeometryCollection;
+	      _selection.select('.preset-wikidata-description').style('display', function () {
+	        return description.length > 0 ? 'flex' : 'none';
+	      }).select('input').attr('value', description);
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
-	  GeometryCollection.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-	    var this$1 = this;
+	      _selection.select('.preset-wikidata-identifier').style('display', function () {
+	        return entity.id ? 'flex' : 'none';
+	      }).select('input').attr('value', entity.id);
+	    }); // not a proper QID
 
-	    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;
+	    function unrecognized() {
+	      _wikidataEntity = null;
+	      setLabelForEntity();
+
+	      _selection.select('.preset-wikidata-description').style('display', 'none');
 
-	    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];
+	      _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
 	  };
-	  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();
-	    }
-	    return area
-	  };
-	  GeometryCollection.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 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
-	        }
-	      }
-	      return true
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-	  };
-	  GeometryCollection.prototype.normalize = function normalize () {
-	    var this$1 = this;
+	    var langs = wikidata.languagesToQuery();
 
-	    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;
+	    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
 
-	    var dimension = Dimension.FALSE;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      dimension = Math.max(dimension, this$1._geometries[i].getBoundaryDimension());
-	    }
-	    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;
+	    return propObj[langKeys[0]].value;
+	  }
 
-	    var sum = 0.0;
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      sum += this$1._geometries[i].getLength();
-	    }
-	    return sum
+	  wiki.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return wiki;
 	  };
-	  GeometryCollection.prototype.getNumPoints = function getNumPoints () {
-	    var this$1 = this;
 
-	    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
+	  wiki.focus = function () {
+	    _searchInput.node().focus();
 	  };
-	  GeometryCollection.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();
-	    }
-	    return this.getFactory().createGeometryCollection(revGeoms)
-	  };
-	  GeometryCollection.prototype.compareToSameClass = function compareToSameClass () {
-	    var this$1 = this;
+	  return utilRebind(wiki, dispatch$1, 'on');
+	}
 
-	    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++;
-	      }
-	      if (i < n1) { return 1 }
-	      if (i < n2) { return -1 }
-	      return 0
-	    }
-	  };
-	  GeometryCollection.prototype.apply = function apply () {
-	    var this$1 = this;
+	function uiFieldWikipedia(field, context) {
+	  var _arguments = arguments;
+	  var dispatch$1 = dispatch('change');
+	  var wikipedia = services.wikipedia;
+	  var wikidata = services.wikidata;
 
-	    if (hasInterface(arguments[0], CoordinateFilter)) {
-	      var filter = arguments[0];
-	      for (var i = 0; i < this._geometries.length; i++) {
-	        this$1._geometries[i].apply(filter);
-	      }
-	    } 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 (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 _langInput = select(null);
 
-	    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;
+	  var _titleInput = select(null);
 
-	    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;
+	  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]);
 
-	    for (var i = 0; i < this._geometries.length; i++) {
-	      if (!this$1._geometries[i].isEmpty()) {
-	        return false
+	        if (entity.tags.name) {
+	          value = entity.tags.name;
+	          break;
+	        }
 	      }
 	    }
-	    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 );
 
-	  return GeometryCollection;
-	}(Geometry));
+	    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 MultiLineString = (function (GeometryCollection$$1) {
-	  function MultiLineString () {
-	    GeometryCollection$$1.apply(this, arguments);
+	  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');
+	    });
 	  }
 
-	  if ( GeometryCollection$$1 ) { MultiLineString.__proto__ = GeometryCollection$$1; }
-	  MultiLineString.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-	  MultiLineString.prototype.constructor = MultiLineString;
+	  function defaultLanguageInfo(skipEnglishFallback) {
+	    var langCode = _mainLocalizer.languageCode().toLowerCase();
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
+	    for (var i in _dataWikipedia) {
+	      var d = _dataWikipedia[i]; // default to the language of iD's current locale
 
-	  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) }
-	  };
-	  MultiLineString.prototype.getBoundaryDimension = function getBoundaryDimension () {
-	    if (this.isClosed()) {
-	      return Dimension.FALSE
-	    }
-	    return 0
-	  };
-	  MultiLineString.prototype.isClosed = function isClosed () {
-	    var this$1 = this;
+	      if (d[2] === langCode) return d;
+	    } // fallback to English
 
-	    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;
 
-	    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;
+	    return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
+	  }
 
-	    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)
-	  };
-	  MultiLineString.prototype.interfaces_ = function interfaces_ () {
-	    return [Lineal]
-	  };
-	  MultiLineString.prototype.getClass = function getClass () {
-	    return MultiLineString
-	  };
-	  staticAccessors.serialVersionUID.get = function () { return 8166665132445433741 };
+	  function language(skipEnglishFallback) {
+	    var value = utilGetSetValue(_langInput).toLowerCase();
 
-	  Object.defineProperties( MultiLineString, staticAccessors );
+	    for (var i in _dataWikipedia) {
+	      var d = _dataWikipedia[i]; // return the language already set in the UI, if supported
 
-	  return MultiLineString;
-	}(GeometryCollection));
+	      if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
+	    } // fallback to English
 
-	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);
+
+	    return defaultLanguageInfo(skipEnglishFallback);
 	  }
-	  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 changeLang() {
+	    utilGetSetValue(_langInput, language()[1]);
+	    change(true);
 	  }
-	};
 
-	var Counter = function Counter () {
-	  this.count = null;
-	};
-	Counter.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Counter.prototype.getClass = function getClass () {
-	  return Counter
-	};
+	  function blur() {
+	    change(true);
+	  }
 
-	// boundary
+	  function change(skipWikidata) {
+	    var value = utilGetSetValue(_titleInput);
+	    var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
 
-	function PrintStream () {}
+	    var langInfo = m && _dataWikipedia.find(function (d) {
+	      return m[1] === d[2];
+	    });
 
-	function StringReader () {}
+	    var syncTags = {};
 
-	var DecimalFormat = function DecimalFormat () {};
+	    if (langInfo) {
+	      var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
 
-	function ByteArrayOutputStream () {}
+	      value = decodeURIComponent(m[2]).replace(/_/g, ' ');
 
-	function IOException () {}
+	      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) {
 
-	function LineNumberReader () {}
+	        anchor = decodeURIComponent(m[3]); // }
 
-	var StringUtil = function StringUtil () {};
+	        value += '#' + anchor.replace(/_/g, ' ');
+	      }
 
-	var staticAccessors$15 = { NEWLINE: { configurable: true },SIMPLE_ORDINATE_FORMAT: { configurable: true } };
+	      value = value.slice(0, 1).toUpperCase() + value.slice(1);
+	      utilGetSetValue(_langInput, nativeLangName);
+	      utilGetSetValue(_titleInput, value);
+	    }
 
-	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;
-	  }
-	  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 {}
+	    if (value) {
+	      syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
+	    } else {
+	      syncTags.wikipedia = undefined;
 	    }
-	    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 );
+	    dispatch$1.call('change', this, syncTags);
+	    if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..
 
-	var CoordinateSequences = function CoordinateSequences () {};
+	    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.
 
-	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()
-	  }
-	};
-	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
-	};
+	      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
 
-	var LineString = (function (Geometry$$1) {
-	  function LineString (points, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._points = null;
-	    this.init(points);
-	  }
+	        if (currTags.wikidata !== value) {
+	          currTags.wikidata = value;
+	          return actionChangeTags(entityID, currTags);
+	        }
 
-	  if ( Geometry$$1 ) { LineString.__proto__ = Geometry$$1; }
-	  LineString.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  LineString.prototype.constructor = LineString;
+	        return null;
+	      }).filter(Boolean);
+	      if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
 
-	  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;
+	      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
+	    });
+	  }
 
-	    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
-	        }
-	      }
-	      return true
-	    } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
+	  wiki.tags = function (tags) {
+	    _tags = tags;
+	    updateForTags(tags);
 	  };
-	  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
-	      }
-	    }
-	  };
-	  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;
+	  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`
 
-	    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
+	    var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
+	    var tagLang = m && m[1];
+	    var tagArticleTitle = m && m[2];
+	    var anchor = m && m[3];
+
+	    var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
+	      return tagLang === d[2];
+	    }); // value in correct format
+
+
+	    if (tagLangInfo) {
+	      var nativeLangName = tagLangInfo[1];
+	      utilGetSetValue(_langInput, nativeLangName);
+	      utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));
+
+	      if (anchor) {
+	        try {
+	          // Best-effort `anchorencode:` implementation
+	          anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
+	        } catch (e) {
+	          anchor = anchor.replace(/ /g, '_');
 	        }
-	        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;
+	      _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
+	    } else {
+	      utilGetSetValue(_titleInput, value);
 
-	    for (var i = 0; i < this._points.size(); i++) {
-	      if (this$1._points.getCoordinate(i).equals(pt)) {
-	        return true
+	      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 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 );
+	  wiki.entityIDs = function (val) {
+	    if (!_arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return wiki;
+	  };
 
-	  return LineString;
-	}(Geometry));
+	  wiki.focus = function () {
+	    _titleInput.node().focus();
+	  };
 
-	var Puntal = function Puntal () {};
+	  return utilRebind(wiki, dispatch$1, 'on');
+	}
+	uiFieldWikipedia.supportsMultiselection = false;
 
-	Puntal.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Puntal.prototype.getClass = function getClass () {
-	  return Puntal
+	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 Point$1 = (function (Geometry$$1) {
-	  function Point (coordinates, factory) {
-	    Geometry$$1.call(this, factory);
-	    this._coordinates = coordinates || null;
-	    this.init(this._coordinates);
-	  }
+	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);
+	    });
 
-	  if ( Geometry$$1 ) { Point.__proto__ = Geometry$$1; }
-	  Point.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  Point.prototype.constructor = Point;
+	    if (entityIDs) {
+	      field.entityIDs = entityIDs; // if this field cares about the entities, pass them along
 
-	  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
+	      if (field.impl.entityIDs) {
+	        field.impl.entityIDs(entityIDs);
 	      }
-	      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 );
+	  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];
+	      });
+	    });
+	  }
 
-	  return Point;
-	}(Geometry));
+	  function tagsContainFieldKey() {
+	    return field.keys.some(function (key) {
+	      if (field.type === 'multiCombo') {
+	        for (var tagKey in _tags) {
+	          if (tagKey.indexOf(key) === 0) {
+	            return true;
+	          }
+	        }
 
-	var Polygonal = function Polygonal () {};
+	        return false;
+	      }
 
-	Polygonal.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	Polygonal.prototype.getClass = function getClass () {
-	  return Polygonal
-	};
+	      return _tags[key] !== undefined;
+	    });
+	  }
 
-	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 revert(d3_event, d) {
+	    d3_event.stopPropagation();
+	    d3_event.preventDefault();
+	    if (!entityIDs || _locked) return;
+	    dispatch$1.call('revert', d, d.keys);
 	  }
 
-	  if ( Geometry$$1 ) { Polygon.__proto__ = Geometry$$1; }
-	  Polygon.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-	  Polygon.prototype.constructor = Polygon;
+	  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);
+	  }
 
-	  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];
-	      }
-	    }
-	    return coordinates
-	  };
-	  Polygon.prototype.getArea = function getArea () {
-	    var this$1 = this;
+	  field.render = function (selection) {
+	    var container = selection.selectAll('.form-field').data([field]); // Enter
 
-	    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;
+	    var enter = container.enter().append('div').attr('class', function (d) {
+	      return 'form-field form-field-' + d.safeid;
+	    }).classed('nowrap', !options.wrap);
 
-	    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()
-	  };
-	  Polygon.prototype.compareToSameClass = function compareToSameClass () {
-	    var this$1 = this;
+	    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');
 
-	    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 (options.remove) {
+	        labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
 	      }
-	      if (i < nHole1) { return 1 }
-	      if (i < nHole2) { return -1 }
-	      return 0
-	    }
-	  };
-	  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 }
-	        }
+	      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'));
 	      }
-	      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;
+	    } // Update
 
-	    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 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;
+	    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);
 
-	    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 };
+	      if (!d.impl) {
+	        createField();
+	      }
 
-	  Object.defineProperties( Polygon, staticAccessors );
+	      var reference, help; // instantiate field help
 
-	  return Polygon;
-	}(Geometry));
+	      if (options.wrap && field.type === 'restrictions') {
+	        help = uiFieldHelp(context, 'restrictions');
+	      } // instantiate tag reference
 
-	var MultiPoint = (function (GeometryCollection$$1) {
-	  function MultiPoint () {
-	    GeometryCollection$$1.apply(this, arguments);
-	  }
 
-	  if ( GeometryCollection$$1 ) { MultiPoint.__proto__ = GeometryCollection$$1; }
-	  MultiPoint.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-	  MultiPoint.prototype.constructor = MultiPoint;
+	      if (options.wrap && options.info) {
+	        var referenceKey = d.key || '';
+
+	        if (d.type === 'multiCombo') {
+	          // lookup key without the trailing ':'
+	          referenceKey = referenceKey.replace(/:$/, '');
+	        }
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
+	        reference = uiTagReference(d.reference || {
+	          key: referenceKey
+	        });
 
-	  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
+	        if (_state === 'hover') {
+	          reference.showing(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;
 
-	    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 };
+	      selection.call(d.impl); // add field help components
 
-	  Object.defineProperties( MultiPoint, staticAccessors );
+	      if (help) {
+	        selection.call(help.body).select('.field-label').call(help.button);
+	      } // add tag reference components
 
-	  return MultiPoint;
-	}(GeometryCollection));
 
-	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();
-	  }
+	      if (reference) {
+	        selection.call(reference.body).select('.field-label').call(reference.button);
+	      }
 
-	  if ( LineString$$1 ) { LinearRing.__proto__ = LineString$$1; }
-	  LinearRing.prototype = Object.create( LineString$$1 && LineString$$1.prototype );
-	  LinearRing.prototype.constructor = LinearRing;
+	      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 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$$1.prototype.isClosed.call(this)
-	  };
-	  LinearRing.prototype.reverse = function reverse () {
-	    var seq = this._points.copy();
-	    CoordinateSequences.reverse(seq);
-	    var rev = this.getFactory().createLinearRing(seq);
-	    return rev
+	    var annotation = container.selectAll('.field-label .label-textannotation');
+	    var icon = annotation.selectAll('.icon').data(_locked ? [0] : []);
+	    icon.exit().remove();
+	    icon.enter().append('svg').attr('class', 'icon').append('use').attr('xlink:href', '#fas-lock');
+	    container.call(_locked ? _lockedTip : _lockedTip.destroy);
 	  };
-	  LinearRing.prototype.validateConstruction = function validateConstruction () {
-	    if (!this.isEmpty() && !LineString$$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 };
-
-	  Object.defineProperties( LinearRing, staticAccessors );
 
-	  return LinearRing;
-	}(LineString));
-
-	var MultiPolygon = (function (GeometryCollection$$1) {
-	  function MultiPolygon () {
-	    GeometryCollection$$1.apply(this, arguments);
-	  }
+	  field.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return field;
+	  };
 
-	  if ( GeometryCollection$$1 ) { MultiPolygon.__proto__ = GeometryCollection$$1; }
-	  MultiPolygon.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-	  MultiPolygon.prototype.constructor = MultiPolygon;
+	  field.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val;
 
-	  var staticAccessors = { serialVersionUID: { configurable: true } };
+	    if (tagsContainFieldKey() && !_show) {
+	      // always show a field if it has a value to display
+	      _show = true;
 
-	  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
+	      if (!field.impl) {
+	        createField();
 	      }
-	      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
+	    }
+
+	    return field;
 	  };
-	  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();
-	    }
-	    return this.getFactory().createMultiPolygon(revGeoms)
+	  field.locked = function (val) {
+	    if (!arguments.length) return _locked;
+	    _locked = val;
+	    return field;
 	  };
-	  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));
-	      }
+	  field.show = function () {
+	    _show = true;
+
+	    if (!field.impl) {
+	      createField();
 	    }
-	    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();
+	    if (field["default"] && field.key && _tags[field.key] !== field["default"]) {
+	      var t = {};
+	      t[field.key] = field["default"];
+	      dispatch$1.call('change', this, t);
 	    }
-	    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 };
+	  }; // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
 
-	  Object.defineProperties( MultiPolygon, staticAccessors );
 
-	  return MultiPolygon;
-	}(GeometryCollection));
+	  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 GeometryEditor = function GeometryEditor (factory) {
-	  this._factory = factory || null;
-	  this._isUserDataCopied = false;
-	};
 
-	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)
-	  }
-	  Assert.shouldNeverReachHere('Unsupported Geometry class: ' + geometry.getClass().getName());
-	  return null
-	};
-	GeometryEditor.prototype.editGeometryCollection = function editGeometryCollection (collection, operation) {
-	    var this$1 = this;
+	  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;
 
-	  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;
+	    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();
 
-	  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 };
+	      if (field.countryCodes && field.countryCodes.indexOf(countryCode) === -1) {
+	        return false;
+	      }
 
-	Object.defineProperties( GeometryEditor, staticAccessors$16 );
+	      if (field.notCountryCodes && field.notCountryCodes.indexOf(countryCode) !== -1) {
+	        return false;
+	      }
+	    }
 
-	var NoOpGeometryOperation = function NoOpGeometryOperation () {};
+	    var prerequisiteTag = field.prerequisiteTag;
 
-	NoOpGeometryOperation.prototype.edit = function edit (geometry, factory) {
-	  return geometry
-	};
-	NoOpGeometryOperation.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryEditor.GeometryEditorOperation]
-	};
-	NoOpGeometryOperation.prototype.getClass = function getClass () {
-	  return NoOpGeometryOperation
-	};
+	    if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
+	    prerequisiteTag) {
+	      if (!entityIDs.every(function (entityID) {
+	        var entity = context.graph().entity(entityID);
 
-	var CoordinateOperation = function CoordinateOperation () {};
+	        if (prerequisiteTag.key) {
+	          var value = entity.tags[prerequisiteTag.key];
+	          if (!value) return false;
 
-	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])
-	    } else {
-	      return factory.createPoint()
-	    }
-	  }
-	  return geometry
-	};
-	CoordinateOperation.prototype.interfaces_ = function interfaces_ () {
-	  return [GeometryEditor.GeometryEditorOperation]
-	};
-	CoordinateOperation.prototype.getClass = function getClass () {
-	  return CoordinateOperation
-	};
+	          if (prerequisiteTag.valueNot) {
+	            return prerequisiteTag.valueNot !== value;
+	          }
 
-	var CoordinateSequenceOperation = function CoordinateSequenceOperation () {};
+	          if (prerequisiteTag.value) {
+	            return prerequisiteTag.value === value;
+	          }
+	        } else if (prerequisiteTag.keyNot) {
+	          if (entity.tags[prerequisiteTag.keyNot]) return false;
+	        }
 
-	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
-	};
+	        return true;
+	      })) return false;
+	    }
 
-	var CoordinateArraySequence = function CoordinateArraySequence () {
-	  var this$1 = this;
+	    return true;
+	  };
 
-	  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();
-	      }
+	  field.focus = function () {
+	    if (field.impl) {
+	      field.impl.focus();
 	    }
-	  }
-	};
+	  };
 
-	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 combinedEntityExtent() {
+	    return entityIDs && entityIDs.length && entityIDs.reduce(function (extent, entityID) {
+	      var entity = context.graph().entity(entityID);
+	      return extent.extend(entity.extent(context.graph()));
+	    }, geoExtent());
 	  }
-	};
-	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;
+	  return utilRebind(field, dispatch$1, 'on');
+	}
 
-	  for (var i = 0; i < this._coordinates.length; i++) {
-	    env.expandToInclude(this$1._coordinates[i]);
-	  }
-	  return env
-	};
-	CoordinateArraySequence.prototype.copy = function copy () {
-	    var this$1 = this;
+	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();
+	    });
 
-	  var cloneCoordinates = new Array(this.size()).fill(null);
-	  for (var i = 0; i < this._coordinates.length; i++) {
-	    cloneCoordinates[i] = this$1._coordinates[i].copy();
-	  }
-	  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 '()'
-	  }
-	};
-	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 };
+	    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
 
-	Object.defineProperties( CoordinateArraySequence, staticAccessors$18 );
+	    var enter = fields.enter().append('div').attr('class', function (d) {
+	      return 'wrap-form-field wrap-form-field-' + d.safeid;
+	    }); // Update
 
-	var CoordinateArraySequenceFactory = function CoordinateArraySequenceFactory () {};
+	    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;
+	  };
 
-	var staticAccessors$17 = { serialVersionUID: { configurable: true },instanceObject: { configurable: true } };
+	  formFields.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return formFields;
+	  };
 
-	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
-	};
+	  formFields.klass = function (val) {
+	    if (!arguments.length) return _klass;
+	    _klass = val;
+	    return formFields;
+	  };
 
-	staticAccessors$17.serialVersionUID.get = function () { return -4099577099607551657 };
-	staticAccessors$17.instanceObject.get = function () { return new CoordinateArraySequenceFactory() };
+	  return formFields;
+	}
 
-	Object.defineProperties( CoordinateArraySequenceFactory, staticAccessors$17 );
+	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);
 
-	/**
-	 * @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();
-	  }
+	  var _state;
 
-	  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
-	  };
+	  var _fieldsArr;
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.put = function put (key, value) {
-	    this.map_.set(key, value);
-	    return value
-	  };
+	  var _presets = [];
 
-	  /**
-	   * @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();
-	    }
-	    return arrayList
-	  };
+	  var _tags;
 
-	  /**
-	   * @override
-	   */
-	  HashMap.prototype.entrySet = function entrySet () {
-	    var hashSet = new HashSet();
-	    this.map_.entries().forEach(function (entry) { return hashSet.add(entry); });
-	    return hashSet
-	  };
+	  var _entityIDs;
 
-	  /**
-	   * @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;
-	    }
-	  }
-	};
+	  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;
+	          });
+	        }
+	      });
 
-	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 };
+	      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]);
+
+	      if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
+	        _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
+	      }
+
+	      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
+	          }));
+	        }
+	      });
 
-	Object.defineProperties( PrecisionModel, staticAccessors$19 );
+	      _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);
+	        });
+	      });
+	    }
 
-	var Type$2 = function Type (name) {
-	  this._name = name || null;
-	  Type.nameToTypeMap.put(name, this);
-	};
+	    _fieldsArr.forEach(function (field) {
+	      field.state(_state).tags(_tags);
+	    });
 
-	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];
+	    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));
+	      }
+	    });
 	  }
-	};
 
-	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)
-	      }
-	    }
-	  })
-	};
-	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)
+	  section.presets = function (val) {
+	    if (!arguments.length) return _presets;
+
+	    if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
+	      _presets = val;
+	      _fieldsArr = null;
 	    }
-	  }
-	};
-	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)
+
+	    return section;
+	  };
+
+	  section.state = function (val) {
+	    if (!arguments.length) return _state;
+	    _state = val;
+	    return section;
+	  };
+
+	  section.tags = function (val) {
+	    if (!arguments.length) return _tags;
+	    _tags = val; // Don't reset _fieldsArr here.
+
+	    return section;
+	  };
+
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+
+	    if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
+	      _entityIDs = val;
+	      _fieldsArr = null;
 	    }
-	  }
-	};
-	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 );
+	    return section;
+	  };
 
-	var geometryTypes = ['Point', 'MultiPoint', 'LineString', 'MultiLineString', 'Polygon', 'MultiPolygon'];
+	  return utilRebind(section, dispatch$1, 'on');
+	}
 
-	/**
-	 * Class for reading and writing Well-Known Text.Create a new parser for GeoJSON
-	 * NOTE: Adapted from OpenLayers 2.11 implementation.
-	 */
+	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;
 
-	/**
-	 * 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;
-	  }
+	  var _entityIDs;
+
+	  var _maxMembers = 1000;
 
-	  var type = obj.type;
+	  function downloadMember(d3_event, d) {
+	    d3_event.preventDefault(); // display the loading indicator
 
-	  if (!parse$2[type]) {
-	    throw new Error('Unknown GeoJSON type: ' + obj.type)
+	    select(this.parentNode).classed('tag-reference-loading', true);
+	    context.loadEntity(d.id, function () {
+	      section.reRender();
+	    });
 	  }
 
-	  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])
+	  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
+
+	    utilHighlightEntities([d.id], true, context);
 	  }
 
-	  // feature or feature collection
-	  return parse$2[type].apply(this, [obj])
-	};
+	  function selectMember(d3_event, d) {
+	    d3_event.preventDefault(); // remove the hover-highlight styling
 
-	/**
-	 * 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();
+	    utilHighlightEntities([d.id], false, context);
+	    var entity = context.entity(d.id);
+	    var mapExtent = context.map().extent();
 
-	  if (!extract[type]) {
-	    throw new Error('Geometry is not supported')
-	  }
+	    if (!entity.intersects(mapExtent, context.graph())) {
+	      // zoom to the entity if its extent is not visible now
+	      context.map().zoomToEase(entity);
+	    }
 
-	  return extract[type].apply(this, [geometry])
-	};
+	    context.enter(modeSelect(context, [d.id]));
+	  }
 
-	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 = {};
+	  function changeRole(d3_event, d) {
+	    var oldRole = d.role;
+	    var newRole = context.cleanRelationRole(select(this).property('value'));
 
-	    // copy features
-	    for (var key in obj) {
-	      feature[key] = obj[key];
+	    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();
 	    }
+	  }
+
+	  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
+	    }));
 
-	    // parse geometry
-	    if (obj.geometry) {
-	      var type = obj.geometry.type;
-	      if (!parse$2[type]) {
-	        throw new Error('Unknown GeoJSON type: ' + obj.type)
+	    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);
 	      }
-	      feature.geometry = this.read(obj.geometry);
-	    }
+	    });
+	    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;
+	          }
 
-	    // bbox
-	    if (obj.bbox) {
-	      feature.bbox = parse$2.bbox.apply(this, [obj.bbox]);
-	    }
+	          return 'translateY(-100%)';
+	        } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+	          if (targetIndex === null || index2 < targetIndex) {
+	            targetIndex = index2;
+	          }
 
-	    return feature
-	  },
+	          return 'translateY(100%)';
+	        }
 
-	  /**
-	   * 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;
+	        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 featureCollection = {};
+	    function bindTypeahead(d) {
+	      var row = select(this);
+	      var role = row.selectAll('input.member-role');
+	      var origValue = role.property('value');
 
-	    if (obj.features) {
-	      featureCollection.features = [];
+	      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]);
+	          }
+	        }
 
-	      for (var i = 0; i < obj.features.length; ++i) {
-	        featureCollection.features.push(this$1.read(obj.features[i]));
+	        return sameletter.concat(other);
 	      }
+
+	      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);
+	      }));
 	    }
 
-	    if (obj.bbox) {
-	      featureCollection.bbox = this.parse.bbox.apply(this, [obj.bbox]);
+	    function unbind() {
+	      var row = select(this);
+	      row.selectAll('input.member-role').call(uiCombobox.off, context);
 	    }
+	  }
 
-	    return featureCollection
-	  },
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return section;
+	  };
 
-	  /**
-	   * 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]));
+	  return section;
+	}
+
+	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;
+	    });
+
+	    for (var i in memberIndexes) {
+	      graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
 	    }
-	    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 graph;
+	  };
+	}
 
-	  /**
-	   * 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)
-	  },
+	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 = [];
 
-	  /**
-	   * Convert an Array with coordinates to a MultiPoint
-	   *
-	   * @param {Array}
-	   *          array Array with coordinates.
-	   *
-	   * @return {MultiPoint} MultiPoint.
-	   */
-	  MultiPoint: function (array) {
-	    var this$1 = this;
+	  var _showBlank;
 
-	    var points = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      points.push(parse$2.Point.apply(this$1, [array[i]]));
-	    }
-	    return this.geometryFactory.createMultiPoint(points)
-	  },
+	  var _maxMemberships = 1000;
 
-	  /**
-	   * 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)
-	  },
+	  function getSharedParentRelations() {
+	    var parents = [];
 
-	  /**
-	   * Convert an Array with coordinates to a MultiLineString
-	   *
-	   * @param {Array}
-	   *          array Array with coordinates.
-	   *
-	   * @return {MultiLineString} MultiLineString.
-	   */
-	  MultiLineString: function (array) {
-	    var this$1 = this;
+	    for (var i = 0; i < _entityIDs.length; i++) {
+	      var entity = context.graph().hasEntity(_entityIDs[i]);
+	      if (!entity) continue;
 
-	    var lineStrings = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      lineStrings.push(parse$2.LineString.apply(this$1, [array[i]]));
+	      if (i === 0) {
+	        parents = context.graph().parentRelations(entity);
+	      } else {
+	        parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
+	      }
+
+	      if (!parents.length) break;
 	    }
-	    return this.geometryFactory.createMultiLineString(lineStrings)
-	  },
 
-	  /**
-	   * Convert an Array to a Polygon
-	   *
-	   * @param {Array}
-	   *          array Array with shell and holes.
-	   *
-	   * @return {Polygon} Polygon.
-	   */
-	  Polygon: function (array) {
-	    var this$1 = this;
+	    return parents;
+	  }
 
-	    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)
-	  },
+	  function getMemberships() {
+	    var memberships = [];
+	    var relations = getSharedParentRelations().slice(0, _maxMemberships);
+	    var isMultiselect = _entityIDs.length > 1;
+	    var i, relation, membership, index, member, indexedMember;
 
-	  /**
-	   * 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;
+	    for (i = 0; i < relations.length; i++) {
+	      relation = relations[i];
+	      membership = {
+	        relation: relation,
+	        members: [],
+	        hash: osmEntity.key(relation)
+	      };
 
-	    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)
-	  },
+	      for (index = 0; index < relation.members.length; index++) {
+	        member = relation.members[index];
 
-	  /**
-	   * Convert an Array to a GeometryCollection
-	   *
-	   * @param {Array}
-	   *          array Array of GeoJSON geometries.
-	   *
-	   * @return {GeometryCollection} GeometryCollection.
-	   */
-	  GeometryCollection: function (array) {
-	    var this$1 = this;
+	        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)
+	            };
+	          }
+	        }
+	      }
 
-	    var geometries = [];
-	    for (var i = 0; i < array.length; ++i) {
-	      var geometry = array[i];
-	      geometries.push(this$1.read(geometry));
+	      if (membership.members.length) memberships.push(membership);
 	    }
-	    return this.geometryFactory.createGeometryCollection(geometries)
+
+	    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;
 	  }
-	};
 
-	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 selectRelation(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.relation.id], false, context);
+	    context.enter(modeSelect(context, [d.relation.id]));
+	  }
 
-	  /**
-	   * 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;
+	  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
 
-	    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
-	    }
-	  },
+	    utilHighlightEntities([d.relation.id], true, context);
+	  }
 
-	  /**
-	   * 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 changeRole(d3_event, d) {
+	    if (d === 0) return; // called on newrow (shouldn't happen)
 
-	    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 (_inChange) return; // avoid accidental recursive call #5731
 
-	  /**
-	   * 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;
+	    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;
+	    });
 
-	    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
+	    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();
 	    }
-	  },
 
-	  /**
-	   * 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;
+	    _inChange = false;
+	  }
 
-	    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 addMembership(d, role) {
+	    this.blur(); // avoid keeping focus on the button
 
-	  /**
-	   * 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;
+	    _showBlank = false;
 
-	    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
+	    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 graph;
+	      };
 	    }
-	  },
 
-	  /**
-	   * 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;
+	    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`
 
-	    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]));
-	    }
-	    return {
-	      type: 'GeometryCollection',
-	      geometries: array
+	      context.enter(modeSelect(context, [relation.id]).newFeature(true));
 	    }
 	  }
-	};
 
-	/**
-	 * Converts a geometry in GeoJSON to a {@link Geometry}.
-	 */
+	  function deleteMembership(d3_event, d) {
+	    this.blur(); // avoid keeping focus on the button
 
-	/**
-	 * 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);
+	    if (d === 0) return; // called on newrow (shouldn't happen)
+	    // remove the hover-highlight styling
 
-	  if (this.precisionModel.getType() === PrecisionModel.FIXED) {
-	    this.reducePrecision(geometry);
+	    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();
 	  }
 
-	  return geometry
-	};
+	  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();
 
-	// NOTE: this is a hack
-	GeoJSONReader.prototype.reducePrecision = function reducePrecision (geometry) {
-	    var this$1 = this;
+	    function baseDisplayLabel(entity) {
+	      var matched = _mainPresetIndex.match(entity, graph);
+	      var presetName = matched && matched.name() || _t('inspector.relation');
+	      var entityName = utilDisplayName(entity) || '';
+	      return presetName + ' ' + entityName;
+	    }
 
-	  var i, len;
+	    var explicitRelation = q && context.hasEntity(q.toLowerCase());
 
-	  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]);
-	    }
-	  }
-	};
+	    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
 
-	/**
-	 * @module GeoJSONWriter
-	 */
+	      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;
+	        });
+	      });
+	    }
 
-	/**
-	 * Writes the GeoJSON representation of a {@link Geometry}. The
-	 * The GeoJSON format is defined <A
-	 * HREF="http://geojson.org/geojson-spec.html">here</A>.
-	 */
+	    result.forEach(function (obj) {
+	      obj.title = obj.value;
+	    });
+	    result.unshift(newRelation);
+	    callback(result);
+	  }
 
-	/**
-	 * 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)
-	};
+	  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
 
-	/* eslint-disable no-undef */
+	    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
 
-	// io
+	    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
 
-	var Position = function Position () {};
+	    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 staticAccessors$20 = { ON: { configurable: true },LEFT: { configurable: true },RIGHT: { configurable: true } };
+	    var addRow = selection.selectAll('.add-row').data([0]); // enter
 
-	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 };
+	    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
 
-	Object.defineProperties( Position, staticAccessors$20 );
+	    addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+	    // update
 
-	/**
-	 * @param {string=} message Optional message
-	 * @extends {Error}
-	 * @constructor
-	 * @private
-	 */
-	function EmptyStackException (message) {
-	  this.message = message || '';
-	}
-	EmptyStackException.prototype = new Error();
+	    addRow = addRow.merge(addRowEnter);
+	    addRow.select('.add-relation').on('click', function () {
+	      _showBlank = true;
+	      section.reRender();
+	      list.selectAll('.member-entity-input').node().focus();
+	    });
 
-	/**
-	 * @type {string}
-	 */
-	EmptyStackException.prototype.name = 'EmptyStackException';
+	    function acceptEntity(d) {
+	      if (!d) {
+	        cancelEntity();
+	        return;
+	      } // remove hover-higlighting
 
-	/**
-	 * @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();
 
-	/**
-	 * @override
-	 */
-	Stack.prototype.add = function (e) {
-	  this.array_.push(e);
-	  return true
-	};
+	      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);
+	    }
 
-	/**
-	 * @override
-	 */
-	Stack.prototype.get = function (index) {
-	  if (index < 0 || index >= this.size()) {
-	    throw new Error()
-	  }
+	    function cancelEntity() {
+	      var input = newMembership.selectAll('.member-entity-input');
+	      input.property('value', ''); // remove hover-higlighting
 
-	  return this.array_[index]
-	};
+	      context.surface().selectAll('.highlighted').classed('highlighted', false);
+	    }
 
-	/**
-	 * 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 bindTypeahead(d) {
+	      var row = select(this);
+	      var role = row.selectAll('input.member-role');
+	      var origValue = role.property('value');
 
-	/**
-	 * 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()
-	  }
+	      function sort(value, data) {
+	        var sameletter = [];
+	        var other = [];
 
-	  return this.array_.pop()
-	};
+	        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]);
+	          }
+	        }
 
-	/**
-	 * 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()
-	  }
+	        return sameletter.concat(other);
+	      }
 
-	  return this.array_[this.array_.length - 1]
-	};
+	      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);
+	      }));
+	    }
 
-	/**
-	 * 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
+	    function unbind() {
+	      var row = select(this);
+	      row.selectAll('input.member-role').call(uiCombobox.off, context);
+	    }
 	  }
-	};
-
-	/**
-	 * @return {boolean}
-	 */
-	Stack.prototype.isEmpty = function () {
-	  return this.empty()
-	};
 
-	/**
-	 * 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)
-	};
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    _showBlank = false;
+	    return section;
+	  };
 
-	/**
-	 * @return {number}
-	 * @export
-	 */
-	Stack.prototype.size = function () {
-	  return this.array_.length
-	};
+	  return section;
+	}
 
-	/**
-	 * @return {Array}
-	 */
-	Stack.prototype.toArray = function () {
-	  var this$1 = this;
+	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();
+	    }
+	  });
 
-	  var array = [];
+	  section.entityIDs = function (val) {
+	    if (!arguments.length) return _selectedIDs;
+	    _selectedIDs = val;
+	    return section;
+	  };
 
-	  for (var i = 0, len = this.array_.length; i < len; i++) {
-	    array.push(this$1.array_[i]);
+	  function selectEntity(d3_event, entity) {
+	    context.enter(modeSelect(context, [entity.id]));
 	  }
 
-	  return array
-	};
-
-	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;
-	  }
-	};
-	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;
+	  function deselectEntity(d3_event, entity) {
+	    d3_event.stopPropagation();
 
-	  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];
-	    }
-	  }
-	};
-	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;
+	    var selectedIDs = _selectedIDs.slice();
 
-	  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 index = selectedIDs.indexOf(entity.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';
+	    if (index > -1) {
+	      selectedIDs.splice(index, 1);
+	      context.enter(modeSelect(context, selectedIDs));
+	    }
 	  }
 
-	  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 list = selection.selectAll('.feature-list').data([0]);
+	    list = list.enter().append('div').attr('class', 'feature-list').merge(list);
 
-	  return TopologyException;
-	}(RuntimeException));
+	    var entities = _selectedIDs.map(function (id) {
+	      return context.hasEntity(id);
+	    }).filter(Boolean);
 
-	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
-	};
+	    var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
+	    items.exit().remove(); // Enter
 
-	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);
+	    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.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 (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);
-	    }
-	  }
-	};
-	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);
-	      }
-	    }
-	  }
-	};
-	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]);
-	      }
-	    }
-	    this._env = edgeEnv;
-	  }
-	  return this._env
-	};
-	BufferSubgraph.prototype.addReachable = function addReachable (startNode) {
-	    var this$1 = this;
+	  return section;
+	}
 
-	  var nodeStack = new Stack();
-	  nodeStack.add(startNode);
-	  while (!nodeStack.empty()) {
-	    var node = nodeStack.pop();
-	    this$1.add(node, nodeStack);
-	  }
-	};
-	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); }
-	  }
-	};
-	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
-	};
+	function uiEntityEditor(context) {
+	  var dispatch$1 = dispatch('choose');
+	  var _state = 'select';
+	  var _coalesceChanges = false;
+	  var _modified = false;
 
-	var TopologyLocation = function TopologyLocation () {
-	  var this$1 = this;
+	  var _base;
 
-	  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 _entityIDs;
 
-	  for (var i = 0; i < this.location.length; i++) {
-	    this$1.location[i] = locValue;
-	  }
-	};
-	TopologyLocation.prototype.isNull = function isNull () {
-	    var this$1 = this;
+	  var _activePresets = [];
 
-	  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 _newFeature;
 
-	  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 _sections;
 
-	  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;
+	  function entityEditor(selection) {
+	    var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header
 
-	  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;
+	    var header = selection.selectAll('.header').data([0]); // Enter
 
-	  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 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
 
-	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;
+	    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
 
-	  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]);
+	    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 }
-	  }
-	  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);
+	    entityEditor.presets(matches);
 	  }
-	};
-	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
+
+	      if (!parentItem.empty()) {
+	        parentItem.select('.preset-list-button').node().focus();
+	      } // arrow right, choose this 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);
+	    } 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;
+	      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();
 	      }
+
+	      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 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());
+
+	    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 {
-	        Assert.shouldNeverReachHere();
+	        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');
 	      }
-	    }
-	    if (valuesTreeForNode.size() <= 0) { return null }
-	    return valuesTreeForNode
+	    };
+
+	    item.preset = preset;
+	    return item;
 	  }
-	};
-	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);
-	        }
-	      }
+	  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 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 (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'));
+	      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;
 	  }
-	};
-	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)
-	    }
-	    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
+	  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 (childBoundable instanceof AbstractNode) {
-	        found = this$1.remove(searchBounds$1, childBoundable, item$1);
-	        if (found) {
-	          childToPrune = childBoundable;
-	          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);
+	        select(this).call(uiTooltip().title(_t.html('inspector.hidden_preset.' + (isAutoHidden ? 'zoom' : 'manual'), {
+	          features: _t.html('feature.' + hiddenPresetFeaturesId + '.description')
+	        })).placement(index < 2 ? 'bottom' : 'top'));
 	      }
+	    });
+	  }
+
+	  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);
 	    }
-	    if (childToPrune !== null) {
-	      if (childToPrune.getChildBoundables().isEmpty()) {
-	        node.getChildBoundables().remove(childToPrune);
+
+	    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 found
+
+	    return Object.keys(counts).sort(function (geom1, geom2) {
+	      return counts[geom2] - counts[geom1];
+	    });
 	  }
-	};
-	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)
+
+	  function combinedEntityExtent() {
+	    return _entityIDs.reduce(function (extent, entityID) {
+	      var entity = context.graph().entity(entityID);
+	      return extent.extend(entity.extent(context.graph()));
+	    }, geoExtent());
 	  }
-	  return this.createHigherLevels(parentBoundables, level + 1)
-	};
-	AbstractSTRtree.prototype.depth = function depth () {
-	    var this$1 = this;
 
-	  if (arguments.length === 0) {
-	    if (this.isEmpty()) {
-	      return 0
+	  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;
 	    }
-	    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; }
-	      }
+
+	    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);
 	    }
-	    return maxChildDepth + 1
-	  }
-	};
-	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 );
+	    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])));
+	  }
+
+	  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 IntersectsOp = function IntersectsOp () {};
+	    if (presets) {
+	      presetList.presets(presets);
+	    }
 
-	var ItemDistance = function ItemDistance () {};
+	    presetPane.call(presetList.autofocus(true));
+	  };
 
-	ItemDistance.prototype.distance = function distance (item1, item2) {};
-	ItemDistance.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	ItemDistance.prototype.getClass = function getClass () {
-	  return ItemDistance
-	};
+	  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);
+	      });
 
-	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()]
+	      if (preset) {
+	        entityEditor.presets([preset]);
 	      }
-	    } 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]
+
+	      editorPane.call(entityEditor);
 	    }
 	  };
-	  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.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.yComparator.get = function () {
-	    return {
-	      interfaces_: function () {
-	        return [Comparator]
-	      },
-	      compare: function (o1, o2) {
-	        return AbstractSTRtree$$1.compareDoubles(STRtree.centreY(o1.getBounds()), STRtree.centreY(o2.getBounds()))
-	      }
-	    }
+
+	  inspector.entityIDs = function (val) {
+	    if (!arguments.length) return _entityIDs;
+	    _entityIDs = val;
+	    return inspector;
 	  };
-	  staticAccessors.intersectsOp.get = function () {
-	    return {
-	      interfaces_: function () {
-	        return [AbstractSTRtree$$1.IntersectsOp]
-	      },
-	      intersects: function (aBounds, bBounds) {
-	        return aBounds.intersects(bBounds)
-	      }
-	    }
+
+	  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;
+	}
 
-	  return STRtree;
-	}(AbstractSTRtree));
+	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 STRtreeNode = (function (AbstractNode$$1) {
-	  function STRtreeNode () {
-	    var level = arguments[0];
-	    AbstractNode$$1.call(this, level);
-	  }
+	  var _current;
 
-	  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 _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 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]);
-	  }
-	  return copy
-	};
+	function uiSourceSwitch(context) {
+	  var keys;
 
-	var SubgraphDepthLocater = function SubgraphDepthLocater () {
-	  this._subgraphs = null;
-	  this._seg = new LineSegment();
-	  this._cga = new CGAlgorithms();
-	  var subgraphs = arguments[0];
-	  this._subgraphs = subgraphs;
-	};
+	  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
 
-	var staticAccessors$30 = { DepthSegment: { configurable: true } };
-	SubgraphDepthLocater.prototype.findStabbedSegments = function findStabbedSegments () {
-	    var this$1 = this;
+	    context.flush(); // remove stored data
 
-	  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);
-	      }
-	    }
+	    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)
 	  }
-	};
-	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 );
 
-	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 sourceSwitch = function sourceSwitch(selection) {
+	    selection.append('a').attr('href', '#').html(_t.html('source_switch.live')).attr('class', 'live chip').on('click', click);
+	  };
 
-	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)
-	};
+	  sourceSwitch.keys = function (_) {
+	    if (!arguments.length) return keys;
+	    keys = _;
+	    return sourceSwitch;
+	  };
 
-	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;
+	  return sourceSwitch;
+	}
 
-	  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
-	};
+	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);
 
-	var PointOnGeometryLocator = function PointOnGeometryLocator () {};
+	    if (osm) {
+	      osm.on('loading.spinner', function () {
+	        img.transition().style('opacity', 1);
+	      }).on('loaded.spinner', function () {
+	        img.transition().style('opacity', 0);
+	      });
+	    }
+	  };
+	}
 
-	PointOnGeometryLocator.prototype.locate = function locate (p) {};
-	PointOnGeometryLocator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointOnGeometryLocator.prototype.getClass = function getClass () {
-	  return PointOnGeometryLocator
-	};
+	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 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)
-	};
+	    var updateMessage = '';
+	    var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
+	    var showSplash = !corePreferences('sawSplash');
 
-	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 } }
+	    if (sawPrivacyVersion !== context.privacyVersion) {
+	      updateMessage = _t('splash.privacy_update');
+	      showSplash = 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
-	};
 
-	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;
+	    if (!showSplash) return;
+	    corePreferences('sawSplash', true);
+	    corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen
 
-	  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;
+	    _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');
+	  };
+	}
+
+	function uiStatus(context) {
+	  var osm = context.connection();
+	  return function (selection) {
+	    if (!osm) return;
+
+	    function update(err, apiStatus) {
+	      selection.html('');
+
+	      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 {
-	          var p = e$1.getCoordinate();
-	          loc = this$1.getLocation(geomi$1, p, geomGraph);
+	          // 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.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
-	  };
-	  Edge.prototype.getCoordinates = function getCoordinates () {
-	    return this.pts
-	  };
-	  Edge.prototype.setIsolated = function setIsolated (isIsolated) {
-	    this._isIsolated = isIsolated;
+	  mode.enter = function () {
+	    context.install(behavior);
 	  };
-	  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
+	  mode.exit = function () {
+	    context.uninstall(behavior);
 	  };
-	  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]
-	    }
-	  };
-	  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;
-	  };
-	  Edge.prototype.getEdgeIntersectionList = function getEdgeIntersectionList () {
-	    return this.eiList
+	  mode.enter = function () {
+	    context.install(behavior);
 	  };
-	  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);
-	    }
-	  }
-	};
-	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;
+	      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)
+	  //     ]
+	  // }
 
-	  if (hasInterface(arguments[0], Collection)) {
-	    var edges = arguments[0];
-	    for (var i0 = edges.iterator(); i0.hasNext();) {
-	      var edge0 = i0.next();
-	      this$1.computeVertexSnaps(edge0);
-	    }
-	  } 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);
-	      }
+
+	  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];
 	    }
-	  }
-	};
-	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;
 
-	  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
-	};
+	    return [];
+	  };
 
-	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;
-	  }
-	};
+	  return utilRebind(conflicts, dispatch$1, 'on');
+	}
 
-	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;
+	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;
+	  };
 
-	  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); }
+	  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);
 	  }
-	};
-	PointPairDistance.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	PointPairDistance.prototype.getClass = function getClass () {
-	  return PointPairDistance
-	};
 
-	var DistanceToPointFinder = function DistanceToPointFinder () {};
+	  function render(selection) {
+	    var initial = false;
 
-	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);
+	    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[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);
+
+	    _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')));
+	        });
+	      }
+	    } // 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] : []);
+	    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 BufferCurveMaximumDistanceFinder = function BufferCurveMaximumDistanceFinder (inputGeom) {
-	  this._maxPtDist = new PointPairDistance();
-	  this._inputGeom = inputGeom || null;
-	};
+	  changesetEditor.tags = function (_) {
+	    if (!arguments.length) return _tags;
+	    _tags = _; // Don't reset _fieldsArr here.
 
-	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 };
+	    return changesetEditor;
+	  };
 
-	Object.defineProperties( BufferCurveMaximumDistanceFinder, staticAccessors$36 );
+	  changesetEditor.changesetID = function (_) {
+	    if (!arguments.length) return _changesetID;
+	    if (_changesetID === _) return changesetEditor;
+	    _changesetID = _;
+	    _fieldsArr = null;
+	    return changesetEditor;
+	  };
 
-	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 utilRebind(changesetEditor, dispatch$1, 'on');
+	}
 
-	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
-	};
+	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 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
-	  }
-	};
+	  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 = '';
 
-	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 (name !== '') {
+	        string += ':';
 	      }
-	      return lines$2
+
+	      return string += ' ' + name;
+	    });
+	    items = itemsEnter.merge(items); // Download changeset link
+
+	    var changeset = new osmChangeset().update({
+	      id: undefined
+	    });
+	    var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+	    delete changeset.id; // Export without chnageset_id
+
+	    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');
+
+	    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);
+	      });
 	    }
-	  } 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);
+
+	    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$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
+	    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);
+	      }
+	    }
 	  }
-	};
-	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());
 	    }
-	    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.defaultChangesetSource()) {
+	      corePreferences('source', context.defaultChangesetSource());
+	      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
-	};
+	    if (context.defaultChangesetHashtags()) {
+	      corePreferences('hashtags', context.defaultChangesetHashtags());
+	      corePreferences('commentDate', Date.now());
+	    }
 
-	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
-	      }
+	    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
+
+	    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
+
+	    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];
+	        }
 
-	  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);
+	        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`
+
+
+	    updateChangeset(changed, onInput);
 
-	  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);
+	    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;
 	    }
-	  }
-	  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
-	};
-	SegmentIntersector$2.prototype.setBoundaryNodes = function setBoundaryNodes (bdyNodes0, bdyNodes1) {
-	  this._bdyNodes = new Array(2).fill(null);
-	  this._bdyNodes[0] = bdyNodes0;
-	  this._bdyNodes[1] = bdyNodes1;
-	};
-	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; }
-	      }
+
+	    if (!fastDeepEqual(context.changeset.tags, tags)) {
+	      context.changeset = context.changeset.update({
+	        tags: tags
+	      });
 	    }
 	  }
+
+	  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.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
+
+	// `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
 	};
 
-	var SimpleMCSweepLineIntersector = (function (EdgeSetIntersector$$1) {
-	  function SimpleMCSweepLineIntersector () {
-	    EdgeSetIntersector$$1.call(this);
-	    this.events = new ArrayList();
-	    this.nOverlaps = null;
-	  }
+	var geometry_1 = geometry;
+	var ring = ringArea;
 
-	  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;
+	function geometry(_) {
+	  var area = 0,
+	      i;
 
-	    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;
+	  switch (_.type) {
+	    case 'Polygon':
+	      return polygonArea(_.coordinates);
 
-	    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
-	        }
+	    case 'MultiPolygon':
+	      for (i = 0; i < _.coordinates.length; i++) {
+	        area += polygonArea(_.coordinates[i]);
 	      }
-	    } 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);
+
+	      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;
+	  }
+	}
+
+	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]));
 	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.addEdge = function addEdge (edge, edgeSet) {
-	    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.
+	 */
 
-	    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));
-	    }
-	  };
-	  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++;
-	        }
+	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.addEdges = function addEdges () {
-	    var this$1 = this;
 
-	    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);
-	      }
+	      p1 = coords[lowerIndex];
+	      p2 = coords[middleIndex];
+	      p3 = coords[upperIndex];
+	      area += (rad(p3[0]) - rad(p1[0])) * Math.sin(rad(p2[1]));
 	    }
-	  };
-	  SimpleMCSweepLineIntersector.prototype.interfaces_ = function interfaces_ () {
-	    return []
-	  };
-	  SimpleMCSweepLineIntersector.prototype.getClass = function getClass () {
-	    return SimpleMCSweepLineIntersector
-	  };
 
-	  return SimpleMCSweepLineIntersector;
-	}(EdgeSetIntersector));
+	    area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
+	  }
 
-	var IntervalRTreeNode = function IntervalRTreeNode () {
-	  this._min = Double.POSITIVE_INFINITY;
-	  this._max = Double.NEGATIVE_INFINITY;
-	};
+	  return area;
+	}
 
-	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 rad(_) {
+	  return _ * Math.PI / 180;
+	}
 
-	Object.defineProperties( IntervalRTreeNode, staticAccessors$45 );
+	var geojsonArea = {
+	  geometry: geometry_1,
+	  ring: ring
+	};
 
-	var NodeComparator = function NodeComparator () {};
+	function toRadians(angleInDegrees) {
+	  return angleInDegrees * Math.PI / 180;
+	}
 
-	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 toDegrees(angleInRadians) {
+	  return angleInRadians * 180 / Math.PI;
+	}
 
-	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;
-	  }
+	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
 
-	  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 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)];
+	}
 
-	  return IntervalRTreeLeafNode;
-	}(IntervalRTreeNode));
+	function validateCenter(center) {
+	  var validCenterLengths = [2, 3];
 
-	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 (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
+	    throw new Error("ERROR! Center has to be an array of length two or three");
 	  }
 
-	  if ( IntervalRTreeNode$$1 ) { IntervalRTreeBranchNode.__proto__ = IntervalRTreeNode$$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
-	  };
-
-	  return IntervalRTreeBranchNode;
-	}(IntervalRTreeNode));
+	  var _center = _slicedToArray(center, 2),
+	      lng = _center[0],
+	      lat = _center[1];
 
-	var SortedPackedIntervalRTree = function SortedPackedIntervalRTree () {
-	  this._leaves = new ArrayList();
-	  this._root = null;
-	  this._level = 0;
-	};
-	SortedPackedIntervalRTree.prototype.buildTree = function buildTree () {
-	    var this$1 = this;
+	  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)));
+	  }
 
-	  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;
+	  if (lng > 180 || lng < -180) {
+	    throw new Error("ERROR! Longitude has to be between -180 and 180 but was ".concat(lng));
 	  }
-	};
-	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 (lat > 90 || lat < -90) {
+	    throw new Error("ERROR! Latitude has to be between -90 and 90 but was ".concat(lat));
 	  }
-	};
-	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 validateRadius(radius) {
+	  if (typeof radius !== "number") {
+	    throw new Error("ERROR! Radius has to be a positive number but was: ".concat(_typeof(radius)));
+	  }
 
-	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);
-	};
+	  if (radius <= 0) {
+	    throw new Error("ERROR! Radius has to be a positive number but was: ".concat(radius));
+	  }
+	}
 
-	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 };
+	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)));
+	  }
 
-	Object.defineProperties( IndexedPointInAreaLocator, staticAccessors$44 );
+	  if (numberOfSegments < 3) {
+	    throw new Error("ERROR! Number of segments has to be at least 3 but was: ".concat(numberOfSegments));
+	  }
+	}
 
-	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
-	};
+	function validateInput(_ref) {
+	  var center = _ref.center,
+	      radius = _ref.radius,
+	      numberOfSegments = _ref.numberOfSegments;
+	  validateCenter(center);
+	  validateRadius(radius);
+	  validateNumberOfSegments(numberOfSegments);
+	}
 
-	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;
+	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 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;
+	  validateInput({
+	    center: center,
+	    radius: radius,
+	    numberOfSegments: numberOfSegments
+	  });
+	  var coordinates = [];
 
-	  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);
+	  for (var i = 0; i < n; ++i) {
+	    coordinates.push(offset(center, radius, 2 * Math.PI * -i / n));
 	  }
-	};
-	IntervalIndexedGeometry.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	IntervalIndexedGeometry.prototype.getClass = function getClass () {
-	  return IntervalIndexedGeometry
-	};
 
-	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
+	  coordinates.push(coordinates[0]);
+	  return {
+	    type: "Polygon",
+	    coordinates: [coordinates]
 	  };
-	  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
+	// `Number.EPSILON` constant
+	// https://tc39.github.io/ecma262/#sec-number.epsilon
+	_export({ target: 'Number', stat: true }, {
+	  EPSILON: Math.pow(2, -52)
+	});
 
-	var GeometryMapper = function GeometryMapper () {};
+	/**
+	 * 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);
 
-	GeometryMapper.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	GeometryMapper.prototype.getClass = function getClass () {
-	  return GeometryMapper
+	  this.next = null;
+	  this.key = key;
+	  this.data = data;
+	  this.left = null;
+	  this.right = null;
 	};
-	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;
+	/* follows "An implementation of top-down splaying"
+	 * by D. Sleator <sleator@cs.cmu.edu> March 1992
+	 */
 
-	    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;
 
-	    // 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
-	  };
+	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.
+	 */
 
-	  return OverlayOp;
-	}(GeometryGraphOp));
 
-	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)
-	      }
-	    })
-	  }
-	  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;
+	function splay(i, t, comparator) {
+	  var N = new Node$1(null, null);
+	  var l = N;
+	  var r = N;
 
-	  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
-	};
+	  while (true) {
+	    var cmp = comparator(i, t.key); //if (i < t.key) {
 
-	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;
+	    if (cmp < 0) {
+	      if (t.left === null) break; //if (i < t.left.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.left.key) < 0) {
+	        var y = t.left;
+	        /* rotate right */
 
-	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.left = y.right;
+	        y.right = t;
+	        t = y;
+	        if (t.left === 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;
+	      r.left = t;
+	      /* link right */
 
-	  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);
-	  }
-	};
-	OffsetPointGenerator.prototype.interfaces_ = function interfaces_ () {
-	  return []
-	};
-	OffsetPointGenerator.prototype.getClass = function getClass () {
-	  return OffsetPointGenerator
-	};
+	      r = t;
+	      t = t.left; //} else if (i > t.key) {
+	    } else if (cmp > 0) {
+	      if (t.right === null) break; //if (i > t.right.key) {
 
-	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)];
-	};
+	      if (comparator(i, t.right.key) > 0) {
+	        var _y = t.right;
+	        /* rotate left */
 
-	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;
+	        t.right = _y.left;
+	        _y.left = t;
+	        t = _y;
+	        if (t.right === null) break;
+	      }
 
-	  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 }
+	      l.right = t;
+	      /* link left */
+
+	      l = t;
+	      t = t.right;
+	    } else break;
 	  }
-	  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 };
+	  /* assemble */
 
-	Object.defineProperties( OverlayResultValidator, staticAccessors$46 );
 
-	// operation.overlay
+	  l.right = t.left;
+	  r.left = t.right;
+	  t.left = N.right;
+	  t.right = N.left;
+	  return t;
+	}
 
-	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;
+	function _insert(i, data, t, comparator) {
+	  var node = new Node$1(i, data);
 
-	  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 (t === null) {
+	    node.left = node.right = null;
+	    return node;
 	  }
-	};
-	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
+	  t = splay(i, t, comparator);
+	  var cmp = comparator(i, t.key);
+
+	  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;
 	  }
-	};
 
-	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(); }
-	};
+	  return node;
+	}
 
-	var staticAccessors$47 = { STRTREE_NODE_CAPACITY: { configurable: true } };
-	CascadedPolygonUnion.prototype.reduceToGeometries = function reduceToGeometries (geomTree) {
-	    var this$1 = this;
+	function _split(key, v, comparator) {
+	  var left = null;
+	  var right = null;
 
-	  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 (v) {
+	    v = splay(key, v, comparator);
+	    var cmp = comparator(v.key, key);
+
+	    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
+	     */
 
-	    // 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: "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
+	     */
 
-	    // 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: "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
+	     */
 
-	    return feature$1(geom, properties);
-	}
+	  }, {
+	    key: "at",
+	    value: function at(index) {
+	      var current = this._root;
+	      var done = false;
+	      var i = 0;
+	      var Q = [];
 
-	/**
-	 * 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}; }
-	    }
-	}
+	      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;
+	        }
+	      }
 
-	/**
-	 * 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;
+	      return null;
+	    }
+	  }, {
+	    key: "next",
+	    value: function next(d) {
+	      var root = this._root;
+	      var successor = null;
 
-	    var reader = new GeoJSONReader();
-	    var result = reader.read(JSON.stringify(arguments[0].geometry));
+	      if (d.right) {
+	        successor = d.right;
 
-	    for (var i = 1; i < arguments.length; i++) {
-	        result = UnionOp.union(result, reader.read(JSON.stringify(arguments$1[i].geometry)));
-	    }
+	        while (successor.left) {
+	          successor = successor.left;
+	        }
 
-	    var writer = new GeoJSONWriter();
-	    result = writer.write(result);
+	        return successor;
+	      }
 
-	    return {
-	        type: 'Feature',
-	        geometry: result,
-	        properties: arguments[0].properties
-	    };
-	}
+	      var comparator = this._comparator;
 
-	// 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;
-	    }
-	    result = !accumulator ? resolved.feature : union$1(accumulator, resolved.feature);
-	  } catch (e) {
-	    console.warn(("Warning:  Error resolving location \"" + location + "\""));
-	    console.warn(e);
-	    result = accumulator;
-	  }
+	      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;
+	      }
 
-	  return result;
-	  /* eslint-enable no-console, no-invalid-this */
-	}
+	      return successor;
+	    }
+	  }, {
+	    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;
+	}
 
-	// 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 });
+	function sortedListToBST(list, start, end) {
+	  var size = end - start;
+
+	  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 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 _location;
-	    var _success;
+	      if (a.point !== b.point) a.link(b); // favor right events over left
 
-	    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.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
 
+	      return Segment.compare(a.segment, b.segment);
+	    } // for ordering points in sweep line order
 
-	    function cancel() {
-	        context.enter(modeBrowse(context));
-	    }
+	  }, {
+	    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'));
+	      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, "]"));
 
-	        var lastPointerUpType;
-
-	        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);
+	var MultiPolyIn = /*#__PURE__*/function () {
+	  function MultiPolyIn(geom, isSubject) {
+	    _classCallCheck$1(this, MultiPolyIn);
 
-	        buttons.each(function(d) {
-	            select(this)
-	                .call(svgIcon('#' + d.icon));
-	        });
-
-	        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, "]."));
 	            }
-	        });
-
-	        var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
-	        context.layers()
-	            .on('change.topToolbar', debouncedUpdate);
+	            /* Only one way to go, so cotinue on the path */
 
-	        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);
 
-	        context.on('enter.uiZoomToSelection', setEnabledState);
+	    this.rings = rings;
+	    this.polys = this._composePolys(rings);
+	  }
 
-	        setEnabledState();
-	    };
-	}
+	  _createClass$1(MultiPolyOut, [{
+	    key: "getGeom",
+	    value: function getGeom() {
+	      var geom = [];
 
-	function uiPane(id, context) {
+	      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
 
-	    var _key;
-	    var _title = '';
-	    var _description = '';
-	    var _iconName = '';
-	    var _sections; // array of uiSection objects
+	        if (polyGeom === null) continue;
+	        geom.push(polyGeom);
+	      }
+
+	      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 drawListItems(layerList, type, change, filter) {
-	        var sources = context.background()
-	            .sources(context.map().extent(), context.map().zoom(), true)
-	            .filter(filter);
+	      function multi(l) {
+	        return l.map(point);
+	      }
 
-	        var layerLinks = layerList.selectAll('li')
-	            .data(sources, function(d) { return d.name(); });
+	      function poly(p) {
+	        return p.map(multi);
+	      }
 
-	        layerLinks.exit()
-	            .remove();
+	      function multiPoly(m) {
+	        return m.map(poly);
+	      }
 
-	        var enter = layerLinks.enter()
-	            .append('li')
-	            .classed('layer-custom', function(d) { return d.id === 'custom'; })
-	            .classed('best', function(d) { return d.best(); });
+	      function geometry(obj) {
+	        if (!obj) {
+	          return {};
+	        }
 
-	        var label = enter
-	            .append('label');
+	        switch (obj.type) {
+	          case "Point":
+	            obj.coordinates = point(obj.coordinates);
+	            return obj;
 
-	        label
-	            .append('input')
-	            .attr('type', type)
-	            .attr('name', 'layers')
-	            .on('change', change);
+	          case "LineString":
+	          case "MultiPoint":
+	            obj.coordinates = multi(obj.coordinates);
+	            return obj;
 
-	        label
-	            .append('span')
-	            .text(function(d) { return d.name(); });
+	          case "Polygon":
+	          case "MultiLineString":
+	            obj.coordinates = poly(obj.coordinates);
+	            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'));
+	          case "MultiPolygon":
+	            obj.coordinates = multiPoly(obj.coordinates);
+	            return obj;
 
-	        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;');
+	          case "GeometryCollection":
+	            obj.geometries = obj.geometries.map(geometry);
+	            return obj;
 
+	          default:
+	            return {};
+	        }
+	      }
 
-	        layerList.selectAll('li')
-	            .sort(sortSources);
+	      function feature(obj) {
+	        obj.geometry = geometry(obj.geometry);
+	        return obj;
+	      }
 
-	        layerList
-	            .call(updateLayerSelections);
+	      function featureCollection(f) {
+	        f.features = f.features.map(feature);
+	        return f;
+	      }
 
+	      function geometryCollection(g) {
+	        g.geometries = g.geometries.map(geometry);
+	        return g;
+	      }
 
-	        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;
-	        }
-	    }
+	      if (!t) {
+	        return t;
+	      }
 
-	    function updateLayerSelections(selection) {
-	        function active(d) {
-	            return context.background().showsLayer(d);
-	        }
+	      switch (t.type) {
+	        case "Feature":
+	          return feature(t);
 
-	        selection.selectAll('li')
-	            .classed('active', active)
-	            .classed('switch', function(d) { return d.id === previousBackgroundID(); })
-	            .call(setTooltips)
-	            .selectAll('input')
-	            .property('checked', active);
-	    }
+	        case "GeometryCollection":
+	          return geometryCollection(t);
 
+	        case "FeatureCollection":
+	          return featureCollection(t);
 
-	    function chooseBackground(d) {
-	        if (d.id === 'custom' && !d.template()) {
-	            return editCustom();
-	        }
+	        case "Point":
+	        case "LineString":
+	        case "Polygon":
+	        case "MultiPoint":
+	        case "MultiPolygon":
+	        case "MultiLineString":
+	          return geometry(t);
 
-	        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();
+	        default:
+	          return t;
+	      }
 	    }
 
+	    module.exports = parse;
+	    module.exports.parse = parse;
+	  })();
+	});
 
-	    function customChanged(d) {
-	        if (d && d.template) {
-	            _customSource.template(d.template);
-	            chooseBackground(_customSource);
-	        } else {
-	            _customSource.template('');
-	            chooseBackground(context.background().findSource('none'));
+	function isObject$4(obj) {
+	  return _typeof(obj) === 'object' && obj !== null;
+	}
+
+	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;
+
+	  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 drawNext(selection) {
-	                if (i < docs.length - 1) {
-	                    var nextLink = selection
-	                        .append('a')
-	                        .attr('class', 'next')
-	                        .on('click', function() {
-	                            clickHelp(docs[i + 1], i + 1);
-	                        });
+	    function linkify(url, text) {
+	      text = text || url;
+	      return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
+	    }
+	  }
 
-	                    nextLink
-	                        .append('span')
-	                        .text(docs[i + 1].title)
-	                        .call(svgIcon((rtl ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'));
-	                }
-	            }
+	  success.changeset = function (val) {
+	    if (!arguments.length) return _changeset;
+	    _changeset = val;
+	    return success;
+	  };
+
+	  success.location = function (val) {
+	    if (!arguments.length) return _location;
+	    _location = val;
+	    return success;
+	  };
+
+	  return utilRebind(success, dispatch$1, 'on');
+	}
 
+	function modeSave(context) {
+	  var mode = {
+	    id: 'save'
+	  };
+	  var keybinding = utilKeybinding('modeSave');
+	  var commit = uiCommit(context).on('cancel', cancel);
 
-	            function drawPrevious(selection) {
-	                if (i > 0) {
-	                    var prevLink = selection
-	                        .append('a')
-	                        .attr('class', 'previous')
-	                        .on('click', function() {
-	                            clickHelp(docs[i - 1], i - 1);
-	                        });
+	  var _conflictsUi; // uiConflicts
 
-	                    prevLink
-	                        .call(svgIcon((rtl ? '#iD-icon-forward' : '#iD-icon-backward'), 'inline'))
-	                        .append('span')
-	                        .text(docs[i - 1].title);
-	                }
-	            }
-	        }
 
+	  var _location;
 
-	        function clickWalkthrough() {
-	            if (context.inIntro()) { return; }
-	            context.container().call(uiIntro(context));
-	            context.ui().togglePanes();
-	        }
+	  var _success;
 
+	  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);
 
-	        function clickShortcuts() {
-	            context.container().call(uiShortcuts(context), true);
-	        }
+	  function cancel() {
+	    context.enter(modeBrowse(context));
+	  }
 
-	        var toc = content
-	            .append('ul')
-	            .attr('class', 'toc');
+	  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 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 showSuccess(changeset) {
+	    commit.reset();
 
-	        var walkthrough = toc
-	            .append('li')
-	            .attr('class', 'walkthrough')
-	            .append('a')
-	            .on('click', clickWalkthrough);
+	    var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
+	      context.ui().sidebar.hide();
+	    });
 
-	        walkthrough
-	            .append('svg')
-	            .attr('class', 'logo logo-walkthrough')
-	            .append('use')
-	            .attr('xlink:href', '#iD-logo-walkthrough');
+	    context.enter(modeBrowse(context).sidebar(ui));
+	  }
 
-	        walkthrough
-	            .append('div')
-	            .text(_t('splash.walkthrough'));
+	  function keybindingOn() {
+	    select(document).call(keybinding.on('⎋', cancel, true));
+	  }
 
+	  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 helpContent = content
-	            .append('div')
-	            .attr('class', 'left-content');
 
-	        var body = helpContent
-	            .append('div')
-	            .attr('class', 'body');
+	  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
+	      });
+	    });
+	  }
 
-	        var nav = helpContent
-	            .append('div')
-	            .attr('class', 'nav');
+	  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
+	    });
 
-	    function getOptions() {
-	        return {
-	            what: corePreferences('validate-what') || 'edited',
-	            where: corePreferences('validate-where') || 'all'
-	        };
-	    }
+	    context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
+	    context.on('enter.modes', update);
+	    update();
 
-	    // get and cache the issues to display, unordered
-	    function reloadIssues() {
-	        _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
-	    }
+	    function update() {
+	      var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
+	        return d.id;
+	      }); // exit
 
-	    function renderDisclosureContent(selection) {
+	      buttons.exit().remove(); // enter
 
-	        var center = context.map().center();
-	        var graph = context.graph();
+	      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
 
-	        // 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;
-	            });
+	        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')));
+	      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)();
+	      }
 
-	        var box = selection.selectAll('.box')
-	            .data([0]);
+	      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 boxEnter = box.enter()
-	            .append('div')
-	            .attr('class', 'box');
+	    function updateButtonStates() {
+	      buttons.classed('disabled', function (d) {
+	        return d.disabled();
+	      }).each(function () {
+	        var selection = select(this);
 
-	        boxEnter
-	            .append('div')
-	            .call(svgIcon('#iD-icon-apply', 'pre-text'));
+	        if (!selection.select('.tooltip.in').empty()) {
+	          selection.call(tooltipBehavior.updateContent);
+	        }
+	      });
+	    }
+
+	    updateButtonStates();
+	    context.map().on('move.uiZoom', updateButtonStates);
+	  };
+	}
+
+	function uiZoomToSelection(context) {
+	  function isDisabled() {
+	    var mode = context.mode();
+	    return !mode || !mode.zoomToSelected;
+	  }
 
-	        var noIssuesMessage = boxEnter
-	            .append('span');
+	  var _lastPointerUpType;
 
-	        noIssuesMessage
-	            .append('strong')
-	            .attr('class', 'message');
+	  function pointerup(d3_event) {
+	    _lastPointerUpType = d3_event.pointerType;
+	  }
 
-	        noIssuesMessage
-	            .append('br');
+	  function click(d3_event) {
+	    d3_event.preventDefault();
 
-	        noIssuesMessage
-	            .append('span')
-	            .attr('class', 'details');
+	    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();
 
-	        renderIgnoredIssuesReset(selection);
-	        setNoIssuesText(selection);
+	      if (mode && mode.zoomToSelected) {
+	        mode.zoomToSelected();
+	      }
 	    }
 
-	    function renderIgnoredIssuesReset(selection) {
-
-	        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;
+
+	  var _maxVal = _detected.cssfilters ? 3 : 1;
 
-	        textSection
-	            .append('h4')
-	            .text(_t('settings.custom_data.or'));
+	  var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];
 
-	        textSection
-	            .append('pre')
-	            .attr('class', 'instructions-url')
-	            .text(_t('settings.custom_data.url.instructions'));
+	  var _options = {
+	    brightness: _storedOpacity !== null ? +_storedOpacity : 1,
+	    contrast: 1,
+	    saturation: 1,
+	    sharpness: 1
+	  };
 
-	        textSection
-	            .append('textarea')
-	            .attr('class', 'field-url')
-	            .attr('placeholder', _t('settings.custom_data.url.placeholder'))
-	            .call(utilNoAuto)
-	            .property('value', _currSettings.url);
+	  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');
 
-	        // accept the current url
-	        function clickSave() {
-	            _currSettings.url = textSection.select('.field-url').property('value').trim();
+	  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
 
-	            // one or the other but not both
-	            if (_currSettings.url) { _currSettings.fileList = null; }
-	            if (_currSettings.fileList) { _currSettings.url = ''; }
 
-	            corePreferences('settings-custom-data-url', _currSettings.url);
-	            this.blur();
-	            modal.close();
-	            dispatch$1.call('change', this, _currSettings);
-	        }
+	    function clickCancel() {
+	      textSection.select('.field-template').property('value', _origSettings.template);
+	      corePreferences('background-custom-template', _origSettings.template);
+	      this.blur();
+	      modal.close();
+	    } // 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);
 	    }
+	  }
 
-	    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);
+	    }
+
+	    selection.selectAll('li').classed('active', active).call(setTooltips).selectAll('input').property('checked', active);
+	  }
 
-	        container = container
-	            .merge(containerEnter);
+	  function chooseOverlay(d3_event, d) {
+	    d3_event.preventDefault();
+	    context.background().toggleOverlayLayer(d);
 
+	    _overlayList.call(updateLayerSelections);
 
-	        var ul = container.selectAll('.layer-list-vectortile');
+	    document.activeElement.blur();
+	  }
 
-	        var li = ul.selectAll('.list-item')
-	            .data(vtData);
+	  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);
 
-	        li.exit()
-	            .remove();
+	    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 liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) { return 'list-item list-item-' + d.src; });
+	  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);
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                select(this).call(
-	                    uiTooltip().title(d.tooltip).placement('top')
-	                );
-	            });
+	    _overlayList.call(drawListItems, 'checkbox', chooseOverlay, function (d) {
+	      return !d.isHidden() && d.overlay;
+	    });
+	  }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'radio')
-	            .attr('name', 'vectortile')
-	            .on('change', selectVTLayer);
+	  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 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);
+	  }
 
-	    function drawListItems(selection, data, type, name, change, active) {
-	        var items = selection.selectAll('li')
-	            .data(data);
+	  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
 
-	        // Exit
-	        items.exit()
-	            .remove();
+	    resetIgnored.exit().remove(); // enter
 
-	        // 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')
-	            );
+	    var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
+	    resetIgnoredEnter.append('a').attr('href', '#'); // update
 
-	        var label = enter
-	            .append('label');
+	    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('input')
-	            .attr('type', type)
-	            .attr('name', name)
-	            .on('change', change);
+	  function setNoIssuesText(selection) {
+	    var opts = getOptions();
 
-	        label
-	            .append('span')
-	            .text(function(d) { return _t(name + '.' + d + '.description'); });
+	    function checkForHiddenIssues(cases) {
+	      for (var type in cases) {
+	        var hiddenOpts = cases[type];
+	        var hiddenIssues = context.validator().getIssues(hiddenOpts);
 
-	        // Update
-	        items = items
-	            .merge(enter);
+	        if (hiddenIssues.length) {
+	          selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.' + type, {
+	            count: hiddenIssues.length.toString()
+	          }));
+	          return;
+	        }
+	      }
 
-	        items
-	            .classed('active', active)
-	            .selectAll('input')
-	            .property('checked', active)
-	            .property('indeterminate', false);
+	      selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.none'));
 	    }
 
-	    function isActiveFill(d) {
-	        return context.map().activeAreaFill() === d;
-	    }
+	    var messageType;
 
-	    function toggleHighlightEdited() {
-	        event.preventDefault();
-	        context.map().toggleHighlightEdited();
+	    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 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);
-	    }
+	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 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(); });
+	function uiSettingsCustomData(context) {
+	  var dispatch$1 = dispatch('change');
 
-	        function layerSupported(d) {
-	            return d.layer && d.layer.supported();
-	        }
-	        function layerEnabled(d) {
-	            return layerSupported(d) && d.layer.enabled();
-	        }
+	  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
 
-	        var ul = selection
-	            .selectAll('.layer-list-photos')
-	            .data([0]);
+	    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);
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-photos')
-	            .merge(ul);
+	    function isSaveDisabled() {
+	      return null;
+	    } // restore the original url
 
-	        var li = ul.selectAll('.list-item-photos')
-	            .data(data);
 
-	        li.exit()
-	            .remove();
+	    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 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;
-	            });
 
-	        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')
-	                    );
-	            });
+	    function clickSave() {
+	      _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both
 
-	        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');
-	            });
+	      if (_currSettings.url) {
+	        _currSettings.fileList = null;
+	      }
 
+	      if (_currSettings.fileList) {
+	        _currSettings.url = '';
+	      }
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', layerEnabled)
-	            .selectAll('input')
-	            .property('checked', layerEnabled);
+	      corePreferences('settings-custom-data-url', _currSettings.url);
+	      this.blur();
+	      modal.close();
+	      dispatch$1.call('change', this, _currSettings);
 	    }
+	  }
 
-	    function drawPhotoTypeItems(selection) {
-	        var data = context.photos().allPhotoTypes();
+	  return utilRebind(render, dispatch$1, 'on');
+	}
 
-	        function typeEnabled(d) {
-	            return context.photos().showsPhotoType(d);
-	        }
+	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);
 
-	        var ul = selection
-	            .selectAll('.layer-list-photo-types')
-	            .data(context.photos().shouldFilterByPhotoType() ? [0] : []);
+	  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);
+	  }
 
-	        ul.exit()
-	            .remove();
+	  function showsLayer(which) {
+	    var layer = layers.layer(which);
 
-	        ul = ul.enter()
-	            .append('ul')
-	            .attr('class', 'layer-list layer-list-photo-types')
-	            .merge(ul);
+	    if (layer) {
+	      return layer.enabled();
+	    }
 
-	        var li = ul.selectAll('.list-item-photo-types')
-	            .data(data);
+	    return false;
+	  }
 
-	        li.exit()
-	            .remove();
+	  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 liEnter = li.enter()
-	            .append('li')
-	            .attr('class', function(d) {
-	                return 'list-item-photo-types list-item-' + d;
-	            });
+	    if (layer) {
+	      layer.enabled(enabled);
 
-	        var labelEnter = liEnter
-	            .append('label')
-	            .each(function(d) {
-	                select(this)
-	                    .call(uiTooltip()
-	                        .title(_t('photo_overlays.photo_type.' + d + '.tooltip'))
-	                        .placement('top')
-	                    );
-	            });
+	      if (!enabled && (which === 'osm' || which === 'notes')) {
+	        context.enter(modeBrowse(context));
+	      }
+	    }
+	  }
 
-	        labelEnter
-	            .append('input')
-	            .attr('type', 'checkbox')
-	            .on('change', function(d) {
-	                context.photos().togglePhotoType(d);
-	            });
+	  function toggleLayer(which) {
+	    setLayer(which, !showsLayer(which));
+	  }
 
-	        labelEnter
-	            .append('span')
-	            .text(function(d) {
-	                return _t('photo_overlays.photo_type.' + d + '.title');
-	            });
+	  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();
+	    });
+	  }
 
+	  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
 
-	        // Update
-	        li
-	            .merge(liEnter)
-	            .classed('active', typeEnabled)
-	            .selectAll('input')
-	            .property('checked', typeEnabled);
-	    }
 
-	    function toggleLayer(which) {
-	        setLayer(which, !showsLayer(which));
-	    }
+	  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
 
-	    function showsLayer(which) {
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            return layer.enabled();
-	        }
-	        return false;
-	    }
+	    li.merge(liEnter).classed('active', isVTLayerSelected).selectAll('input').property('checked', isVTLayerSelected);
 
-	    function setLayer(which, enabled) {
-	        var layer = layers.layer(which);
-	        if (layer) {
-	            layer.enabled(enabled);
-	        }
+	    function isVTLayerSelected(d) {
+	      return dataLayer && dataLayer.template() === d.template;
 	    }
 
-	    context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
-	    context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+	    function selectVTLayer(d3_event, d) {
+	      corePreferences('settings-custom-data-url', d.template);
 
-	    return section;
-	}
+	      if (dataLayer) {
+	        dataLayer.template(d.template, d.src);
+	        dataLayer.enabled(true);
+	      }
+	    }
+	  }
 
-	function uiPaneMapData(context) {
+	  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
 
-	    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)
-	        ]);
+	    ul.exit().remove(); // Enter
 
-	    return mapDataPane;
-	}
+	    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
 
-	function uiSectionPrivacy(context) {
+	    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);
+	  }
 
-	    var section = uiSection('preferences-third-party', context)
-	      .title(_t('preferences.privacy.title'))
-	      .disclosureContent(renderDisclosureContent);
+	  function editCustom(d3_event) {
+	    d3_event.preventDefault();
+	    context.container().call(settingsCustomData);
+	  }
 
-	    var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+	  function customChanged(d) {
+	    var dataLayer = layers.layer('data');
 
-	    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')
-	        );
+	    if (d && d.url) {
+	      dataLayer.url(d.url);
+	    } else if (d && d.fileList) {
+	      dataLayer.fileList(d.fileList);
+	    }
+	  }
 
-	      thirdPartyIconsEnter
-	        .append('input')
-	        .attr('type', 'checkbox')
-	        .on('change', function () {
-	          event.preventDefault();
-	          _showThirdPartyIcons = (_showThirdPartyIcons === 'true') ? 'false' : 'true';
-	          corePreferences('preferences.privacy.thirdpartyicons', _showThirdPartyIcons);
-	          update();
-	        });
+	  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('span')
-	        .text(_t('preferences.privacy.third_party_icons.description'));
+	  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;
+	}
 
+	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
 
-	      // 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'));
+	    container = container.merge(containerEnter);
+	    container.selectAll('.layer-feature-list').call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
+	  }
 
-	      update();
+	  function drawListItems(selection, data, type, name, change, active) {
+	    var items = selection.selectAll('li').data(data); // Exit
+
+	    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) {
-	                    // 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; }
+	    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);
 
-	        aboutList
-	            .append('li')
-	            .attr('class', 'user-list')
-	            .attr('tabindex', -1)
-	            .call(uiContributors(context));
+	    function usernameValue() {
+	      var usernames = context.photos().usernames();
+	      if (usernames) return usernames.join('; ');
+	      return usernames;
+	    }
+	  }
 
+	  function toggleLayer(which) {
+	    setLayer(which, !showsLayer(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);
+	  function showsLayer(which) {
+	    var layer = layers.layer(which);
 
-	        ui.hash = behaviorHash(context);
-	        ui.hash();
-	        if (!ui.hash.hadHash) {
-	            map.centerZoom([0, 0], 2);
-	        }
+	    if (layer) {
+	      return layer.enabled();
+	    }
 
+	    return false;
+	  }
 
-	        var overMap = content
-	            .append('div')
-	            .attr('class', 'over-map');
+	  function setLayer(which, enabled) {
+	    var layer = layers.layer(which);
 
-	        // Map controls
-	        var controls = overMap
-	            .append('div')
-	            .attr('class', 'map-controls');
+	    if (layer) {
+	      layer.enabled(enabled);
+	    }
+	  }
 
-	        controls
-	            .append('div')
-	            .attr('class', 'map-control zoombuttons')
-	            .call(uiZoom(context));
+	  context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
+	  context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+	  return section;
+	}
 
-	        controls
-	            .append('div')
-	            .attr('class', 'map-control zoom-to-selection-control')
-	            .call(uiZoomToSelection(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 geolocate-control')
-	            .call(uiGeolocate(context));
+	function uiSectionPrivacy(context) {
+	  var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);
 
-	        // 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)
-	        ];
+	  var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
 
-	        uiPanes.forEach(function(pane) {
-	            controls
-	                .append('div')
-	                .attr('class', 'map-control map-pane-control ' + pane.id + '-control')
-	                .call(pane.renderToggleButton);
+	  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
 
-	            panes
-	                .call(pane.renderPane);
-	        });
+	    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();
 
-	        ui.info = uiInfo(context);
+	    function update() {
+	      selection.selectAll('.privacy-third-party-icons-item').classed('active', _showThirdPartyIcons === 'true').select('input').property('checked', _showThirdPartyIcons === 'true');
+	    }
+	  }
 
-	        // 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));
+	  return section;
+	}
 
+	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;
+	}
 
-	        overMap
-	            .append('div')
-	            .attr('class', 'photoviewer')
-	            .classed('al', true)       // 'al'=left,  'ar'=right
-	            .classed('hide', true)
-	            .call(ui.photoviewer);
+	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
 
+	      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();
+	      });
+	    }
 
-	        // Bind events
-	        window.onbeforeunload = function() {
-	            return context.save();
-	        };
-	        window.onunload = function() {
-	            context.history().unlock();
-	        };
+	    if ('PointerEvent' in window) {
+	      select(window).on('pointerdown.ui pointerup.ui', function (d3_event) {
+	        var pointerType = d3_event.pointerType || '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();
-	            });
+	        if (_lastPointerType !== pointerType) {
+	          _lastPointerType = pointerType;
+	          container.attr('pointer', pointerType);
+	        }
+	      }, true);
+	    } else {
+	      _lastPointerType = 'mouse';
+	      container.attr('pointer', 'mouse');
+	    }
 
-	        context
-	            .on('enter.editor', function(entered) {
-	                container
-	                    .classed('mode-' + entered.id, true);
-	            })
-	            .on('exit.editor', function(exited) {
-	                container
-	                    .classed('mode-' + exited.id, false);
-	            });
+	    container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
 
-	        context.enter(modeBrowse(context));
+	    container.call(uiFullScreen(context));
+	    var map = context.map();
+	    map.redrawEnable(false); // don't draw until we've set zoom/lat/long
 
-	        if (!_initCounter++) {
-	            if (!ui.hash.startWalkthrough) {
-	                context.container()
-	                    .call(uiSplash(context))
-	                    .call(uiRestore(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)
 
-	            context.container()
-	                .call(uiShortcuts(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
 
-	        var osm = context.connection();
-	        var auth = uiLoading(context).message(_t('loading_auth')).blocking(true);
+	    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();
 
-	        if (osm && auth) {
-	            osm
-	                .on('authLoading.ui', function() {
-	                    context.container()
-	                        .call(auth);
-	                })
-	                .on('authDone.ui', function() {
-	                    auth.close();
-	                });
-	        }
+	    if (apiConnections && apiConnections.length > 1) {
+	      aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));
+	    }
 
-	        _initCounter++;
+	    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));
 
-	        if (ui.hash.startWalkthrough) {
-	            ui.hash.startWalkthrough = false;
-	            context.container().call(uiIntro(context));
-	        }
+	    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.
 
 
-	        function pan(d) {
-	            return function() {
-	                if (event.shiftKey) { return; }
-	                if (context.container().select('.combobox').size()) { return; }
-	                event.preventDefault();
-	                context.map().pan(d, 100);
-	            };
-	        }
+	    ui.onResize();
+	    map.redrawEnable(true);
+	    ui.hash = behaviorHash(context);
+	    ui.hash();
+
+	    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 = '2.18.4';
-	  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. */
 	  // 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) {
@@ -118105,53 +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));
 	    }
 	  };
@@ -118159,8 +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);
 	        }
@@ -118168,8 +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]));
 	    });
@@ -118177,25 +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
@@ -118203,46 +98357,53 @@
 	      val = '';
 	    } else {
 	      val = val.toString();
-	    }
+	    } // remove whitespace
 
-	    // remove whitespace
-	    val = val.trim();
 
-	    // use the canonical form of the string
-	    if (val.normalize) { val = val.normalize('NFC'); }
+	    val = val.trim(); // use the canonical form of the string
+
+	    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);
@@ -118253,236 +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.activeID = function () { return _mode && _mode.activeID && _mode.activeID(); };
+	  context.selectedIDs = function () {
+	    return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
+	  };
+
+	  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;
@@ -118493,35 +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
+	    } // 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() {
 
+
+	    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();
@@ -118529,35 +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,
@@ -118603,6 +98837,7 @@
 		actionReverse: actionReverse,
 		actionRevert: actionRevert,
 		actionRotate: actionRotate,
+		actionScale: actionScale,
 		actionSplit: actionSplit,
 		actionStraightenNodes: actionStraightenNodes,
 		actionStraightenWay: actionStraightenWay,
@@ -118800,6 +99035,7 @@
 		uiFieldDefaultCheck: uiFieldCheck,
 		uiFieldOnewayCheck: uiFieldCheck,
 		uiFieldCheck: uiFieldCheck,
+		uiFieldManyCombo: uiFieldCombo,
 		uiFieldMultiCombo: uiFieldCombo,
 		uiFieldNetworkCombo: uiFieldCombo,
 		uiFieldSemiCombo: uiFieldCombo,
@@ -118989,24 +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;
 
 }());