5 function createMap(divName) {
6 map = new OpenLayers.Map(divName);
8 var mapnik = new OpenLayers.Layer.OSM.Mapnik("Mapnik", { displayOutsideMaxExtent: true });
11 var osmarender = new OpenLayers.Layer.OSM.Osmarender("Osmarender", { displayOutsideMaxExtent: true });
12 map.addLayer(osmarender);
14 var numZoomLevels = Math.max(mapnik.numZoomLevels, osmarender.numZoomLevels);
15 markers = new OpenLayers.Layer.Markers("Markers", { visibility: false, numZoomLevels: numZoomLevels });
16 map.addLayer(markers);
18 map.addControl(new OpenLayers.Control.LayerSwitcher());
19 map.addControl(new OpenLayers.Control.KeyboardDefaults());
24 function getArrowIcon() {
25 var size = new OpenLayers.Size(25, 22);
26 var offset = new OpenLayers.Pixel(-30, -27);
27 var icon = new OpenLayers.Icon("/images/arrow.png", size, offset);
32 function addMarkerToMap(position, icon, description) {
33 var marker = new OpenLayers.Marker(position, icon);
35 markers.addMarker(marker);
36 markers.setVisibility(true);
39 marker.events.register("click", marker, function() { openMapPopup(marker, description) });
45 function openMapPopup(marker, description) {
48 popup = new OpenLayers.Popup.AnchoredBubble("popup", marker.lonlat,
49 sizeMapPopup(description),
50 "<p style='padding-right: 28px'>" + description + "</p>",
52 popup.setBackgroundColor("#E3FFC5");
58 function closeMapPopup() {
60 map.removePopup(popup);
65 function sizeMapPopup(text) {
66 var box = document.createElement("div");
69 box.style.visibility = "hidden";
70 box.style.position = "absolute";
71 box.style.top = "0px";
72 box.style.left = "0px";
73 box.style.width = "200px";
74 box.style.height = "auto";
76 document.body.appendChild(box);
78 var width = box.offsetWidth;
79 var height = box.offsetHeight;
81 document.body.removeChild(box);
83 return new OpenLayers.Size(width + 30, height + 24);
86 function removeMarkerFromMap(marker){
87 markers.removeMarker(marker);
90 function getMapLayers() {
93 for (var i=0; i< this.map.layers.length; i++) {
94 var layer = this.map.layers[i];
96 if (layer.isBaseLayer) {
97 layers += (layer == this.map.baseLayer) ? "B" : "0";
99 layers += (layer.getVisibility()) ? "T" : "F";
106 function setMapLayers(layers) {
107 for (var i=0; i < layers.length; i++) {
108 var layer = map.layers[i];
109 var c = layers.charAt(i);
112 map.setBaseLayer(layer);
113 } else if ( (c == "T") || (c == "F") ) {
114 layer.setVisibility(c == "T");
119 function mercatorToLonLat(merc) {
120 var lon = (merc.lon / 20037508.34) * 180;
121 var lat = (merc.lat / 20037508.34) * 180;
123 lat = 180/Math.PI * (2 * Math.atan(Math.exp(lat * Math.PI / 180)) - Math.PI / 2);
125 return new OpenLayers.LonLat(lon, lat);
128 function lonLatToMercator(ll) {
129 var lon = ll.lon * 20037508.34 / 180;
130 var lat = Math.log(Math.tan((90 + ll.lat) * Math.PI / 360)) / (Math.PI / 180);
132 lat = lat * 20037508.34 / 180;
134 return new OpenLayers.LonLat(lon, lat);
137 function scaleToZoom(scale) {
138 return Math.log(360.0/(scale * 512.0)) / Math.log(2.0);