110 lines
3.2 KiB
JavaScript
110 lines
3.2 KiB
JavaScript
var map;
|
|
var markers;
|
|
var popup;
|
|
|
|
function createMap(divName, centre, zoom) {
|
|
OpenLayers.Util.onImageLoadError = function() {
|
|
this.src = OpenLayers.Util.getImagesLocation() + "404.png";
|
|
}
|
|
|
|
map = new OpenLayers.Map(divName,
|
|
{ maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
|
|
numZoomLevels: 19,
|
|
maxResolution: 156543,
|
|
units: 'm',
|
|
projection: "EPSG:41001" });
|
|
|
|
var mapnik = new OpenLayers.Layer.TMS("Mapnik",
|
|
"http://tile.openstreetmap.org/",
|
|
{ type: 'png', getURL: getTileURL });
|
|
map.addLayer(mapnik);
|
|
|
|
var osmarender = new OpenLayers.Layer.TMS("Osmarender",
|
|
"http://dev.openstreetmap.org/~ojw/Tiles/tile.php/",
|
|
{ type: 'png', getURL: getTileURL });
|
|
map.addLayer(osmarender);
|
|
|
|
map.addControl(new OpenLayers.Control.LayerSwitcher());
|
|
map.setCenter(centre, zoom);
|
|
|
|
return map;
|
|
}
|
|
|
|
function getTileURL(bounds) {
|
|
var res = this.map.getResolution();
|
|
var x = Math.round((bounds.left - this.maxExtent.left) / (res * this.tileSize.w));
|
|
var y = Math.round((this.maxExtent.top - bounds.top) / (res * this.tileSize.h));
|
|
var z = this.map.getZoom();
|
|
|
|
return this.url + z + "/" + x + "/" + y + "." + this.type;
|
|
}
|
|
|
|
function addMarkerToMap(position, icon, description) {
|
|
if (markers == null) {
|
|
markers = new OpenLayers.Layer.Markers("markers");
|
|
map.addLayer(markers);
|
|
}
|
|
|
|
var marker = new OpenLayers.Marker(position, icon);
|
|
|
|
markers.addMarker(marker);
|
|
|
|
if (description) {
|
|
marker.events.register("click", marker, function() { openMapPopup(marker, description) });
|
|
}
|
|
|
|
return marker;
|
|
}
|
|
|
|
function openMapPopup(marker, description) {
|
|
// var box = document.createElement("div");
|
|
// box.innerHTML = description;
|
|
// box.style.display = 'none';
|
|
// box.style.width = "200px";
|
|
// document.body.appendChild(box);
|
|
|
|
closeMapPopup();
|
|
|
|
popup = new OpenLayers.Popup.AnchoredBubble("popup", marker.lonlat,
|
|
new OpenLayers.Size(200, 50),
|
|
"<p>" + description + "</p>",
|
|
marker.icon, true);
|
|
popup.setBackgroundColor("#E3FFC5");
|
|
map.addPopup(popup);
|
|
|
|
return popup;
|
|
}
|
|
|
|
function closeMapPopup() {
|
|
if (popup) {
|
|
map.removePopup(popup);
|
|
delete popup;
|
|
}
|
|
}
|
|
|
|
function removeMarkerFromMap(marker){
|
|
markers.removeMarker(marker);
|
|
}
|
|
|
|
function mercatorToLonLat(merc) {
|
|
var lon = (merc.lon / 20037508.34) * 180;
|
|
var lat = (merc.lat / 20037508.34) * 180;
|
|
var PI = 3.14159265358979323846;
|
|
|
|
lat = 180/PI * (2 * Math.atan(Math.exp(lat * PI / 180)) - 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) * PI / 360)) / (PI / 180);
|
|
|
|
lat = lat * 20037508.34 / 180;
|
|
|
|
return new OpenLayers.LonLat(lon, lat);
|
|
}
|
|
|
|
function scaleToZoom(scale) {
|
|
return Math.log(360.0/(scale * 512.0)) / Math.log(2.0);
|
|
}
|