+var epsg4326 = new OpenLayers.Projection("EPSG:4326");
var map;
var markers;
var popup;
OpenLayers._getScriptLocation = function () {
return "/openlayers/";
}
-
+
function createMap(divName) {
- map = new OpenLayers.Map(divName);
+ map = new OpenLayers.Map(divName, {
+ controls: [
+ new OpenLayers.Control.ArgParser(),
+ new OpenLayers.Control.Attribution(),
+ new OpenLayers.Control.LayerSwitcher(),
+ new OpenLayers.Control.Navigation(),
+ new OpenLayers.Control.PanZoomBar(),
+ new OpenLayers.Control.ScaleLine()
+ ],
+ units: "m",
+ maxResolution: 156543,
+ numZoomLevels: 20
+ });
- var mapnik = new OpenLayers.Layer.OSM.Mapnik("Mapnik", { displayOutsideMaxExtent: true });
+ var mapnik = new OpenLayers.Layer.OSM.Mapnik("Mapnik", {
+ displayOutsideMaxExtent: true,
+ wrapDateLine: true
+ });
map.addLayer(mapnik);
- var osmarender = new OpenLayers.Layer.OSM.Osmarender("Osmarender", { displayOutsideMaxExtent: true });
+ var osmarender = new OpenLayers.Layer.OSM.Osmarender("Osmarender", {
+ displayOutsideMaxExtent: true,
+ wrapDateLine: true
+ });
map.addLayer(osmarender);
- var maplint = new OpenLayers.Layer.OSM.Maplint("Maplint", { displayOutsideMaxExtent: true });
+ var maplint = new OpenLayers.Layer.OSM.Maplint("Maplint", {
+ displayOutsideMaxExtent: true,
+ wrapDateLine: true
+ });
map.addLayer(maplint);
var numZoomLevels = Math.max(mapnik.numZoomLevels, osmarender.numZoomLevels);
- markers = new OpenLayers.Layer.Markers("Markers", {
- displayInLayerSwitcher: false, numZoomLevels: numZoomLevels,
+ markers = new OpenLayers.Layer.Markers("Markers", {
+ displayInLayerSwitcher: false,
+ numZoomLevels: numZoomLevels,
maxExtent: new OpenLayers.Bounds(-20037508,-20037508,20037508,20037508),
maxResolution: 156543,
units: "m",
- projection: "EPSG:41001"
+ projection: "EPSG:900913"
});
map.addLayer(markers);
- map.addControl(new OpenLayers.Control.LayerSwitcher());
- map.addControl(new OpenLayers.Control.KeyboardDefaults());
-
return map;
}
}
function addMarkerToMap(position, icon, description) {
- var marker = new OpenLayers.Marker(position, icon);
+ var marker = new OpenLayers.Marker(position.clone().transform(epsg4326, map.getProjectionObject()), icon);
markers.addMarker(marker);
function openMapPopup(marker, description) {
closeMapPopup();
- popup = new OpenLayers.Popup.AnchoredBubble("popup", marker.lonlat,
- sizeMapPopup(description),
- "<p style='padding-right: 28px'>" + description + "</p>",
- marker.icon, true);
+ popup = new OpenLayers.Popup.AnchoredBubble("popup", marker.lonlat, null,
+ description, marker.icon, true);
popup.setBackgroundColor("#E3FFC5");
+ popup.autoSize = true;
map.addPopup(popup);
return popup;
}
}
-function sizeMapPopup(text) {
- var box = document.createElement("div");
-
- box.innerHTML = text;
- box.style.visibility = "hidden";
- box.style.position = "absolute";
- box.style.top = "0px";
- box.style.left = "0px";
- box.style.width = "200px";
- box.style.height = "auto";
-
- document.body.appendChild(box);
+function removeMarkerFromMap(marker){
+ markers.removeMarker(marker);
+}
- var width = box.offsetWidth;
- var height = box.offsetHeight;
+function getMapCenter(center, zoom) {
+ return map.getCenter().clone().transform(map.getProjectionObject(), epsg4326);
+}
- document.body.removeChild(box);
+function setMapCenter(center, zoom) {
+ map.setCenter(center.clone().transform(epsg4326, map.getProjectionObject()), zoom);
+}
- return new OpenLayers.Size(width + 30, height + 24);
+function setMapExtent(extent) {
+ map.zoomToExtent(extent.clone().transform(epsg4326, map.getProjectionObject()));
}
-function removeMarkerFromMap(marker){
- markers.removeMarker(marker);
+function getEventPosition(event) {
+ return map.getLonLatFromViewPortPx(event.xy).clone().transform(epsg4326, map.getProjectionObject());
}
function getMapLayers() {
function setMapLayers(layers) {
for (var i=0; i < layers.length; i++) {
var layer = map.layers[i];
- var c = layers.charAt(i);
- if (c == "B") {
- map.setBaseLayer(layer);
- } else if ( (c == "T") || (c == "F") ) {
- layer.setVisibility(c == "T");
+ if (layer) {
+ var c = layers.charAt(i);
+
+ if (c == "B") {
+ map.setBaseLayer(layer);
+ } else if ( (c == "T") || (c == "F") ) {
+ layer.setVisibility(c == "T");
+ }
}
}
}
-function mercatorToLonLat(merc) {
- var lon = (merc.lon / 20037508.34) * 180;
- var lat = (merc.lat / 20037508.34) * 180;
-
- lat = 180/Math.PI * (2 * Math.atan(Math.exp(lat * Math.PI / 180)) - Math.PI / 2);
-
- return new OpenLayers.LonLat(lon, lat);
-}
-
-function lonLatToMercator(ll) {
- var lon = ll.lon * 20037508.34 / 180;
- var lat = Math.log(Math.tan((90 + ll.lat) * Math.PI / 360)) / (Math.PI / 180);
-
- lat = lat * 20037508.34 / 180;
-
- return new OpenLayers.LonLat(lon, lat);
-}
-
-// for interacting with the PostGIS database which uses non spherical
-// Mercator. Taken from Freemap which in turn was taken from a standard
-// algorithm off the net.
-
-function lonLatToNonSphericalMercator(ll) {
- var custLat = ll.lat * (Math.PI/180);
- var a = 6378137;
- var b = 6356752.3142;
- var f = (a-b)/a;
- var e = Math.sqrt(2*f-Math.pow(f,2));
- custLat=a*Math.log(Math.tan(Math.PI/4+custLat/2)*
- Math.pow(( (1-e*Math.sin(custLat)) / (1+e*Math.sin(custLat))),e/2));
- custLon = ll.lon * (Math.PI/180) * 6378137;
- return new OpenLayers.LonLat (custLon,custLat);
-}
-
-function nonSphericalMercatorToLonLat(merc) {
- var lon_deg, lat_deg;
- var a = 6378137.0;
- var b = 6356752.3142;
- var k0 = 1.0;
- var t = 1.0 - b/a;
- var es = 2*t - t*t;
- var e = Math.sqrt(es);
- lon_deg = merc.lon;
- lat_deg = merc.lat;
- lon_deg /= a;
- lat_deg /= a;
- lon_deg /= k0;
- lat_deg = phi2(Math.exp(-lat_deg/k0), e);
- lon_deg *= (180/M_PI);
- lat_deg *= (180/M_PI);
- return new OpenLayers.LonLat(lon_deg,lat_deg);
-}
-
-function phi2 (ts,e) {
- var eccnth = 0.5*e;
- var Phi = (PI/2) - 2.0*Math.atan(ts);
- var dphi;
- var i=15;
- do {
- var con = e*Math.sin(Phi);
- dphi = (PI/2) - 2.0*Math.atan(ts*Math.pow((1.0-con)/(1.0+con),eccnth))
- - Phi;
- Phi += dphi;
- }
- while(Math.abs(dphi) > 0.0000000001 && --i);
- return Phi;
-}
-
function scaleToZoom(scale) {
return Math.log(360.0/(scale * 512.0)) / Math.log(2.0);
}
projects / rails.git / blobdiff