var markers;
var popup;
+OpenLayers._getScriptLocation = function () {
+ return "/openlayers/";
+}
+
function createMap(divName) {
- OpenLayers.Util.onImageLoadError = function() {
- this.src = OpenLayers.Util.getImagesLocation() + "404.png";
- }
-
- map = new OpenLayers.Map(divName,
- { maxExtent: new OpenLayers.Bounds(-20037508,-20037508,20037508,20037508),
- numZoomLevels: 19,
- maxResolution: 156543,
- units: 'm',
- projection: "EPSG:41001" });
+ map = new OpenLayers.Map(divName);
- var mapnik = new OpenLayers.Layer.TMS("Mapnik",
- "http://tile.openstreetmap.org/",
- { type: 'png', getURL: getTileURL, displayOutsideMaxExtent: true });
+ var mapnik = new OpenLayers.Layer.OSM.Mapnik("Mapnik", { displayOutsideMaxExtent: true });
map.addLayer(mapnik);
- var osmarender = new OpenLayers.Layer.TMS("Osmarender",
- "http://dev.openstreetmap.org/~ojw/Tiles/tile.php/",
- { type: 'png', getURL: getTileURL, displayOutsideMaxExtent: true });
+ var osmarender = new OpenLayers.Layer.OSM.Osmarender("Osmarender", { displayOutsideMaxExtent: true });
map.addLayer(osmarender);
- markers = new OpenLayers.Layer.Markers("markers", { visibility: false });
+ var maplint = new OpenLayers.Layer.OSM.Maplint("Maplint", { displayOutsideMaxExtent: true });
+ map.addLayer(maplint);
+
+ var numZoomLevels = Math.max(mapnik.numZoomLevels, osmarender.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"
+ });
map.addLayer(markers);
map.addControl(new OpenLayers.Control.LayerSwitcher());
+ map.addControl(new OpenLayers.Control.KeyboardDefaults());
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();
- var limit = Math.pow(2, z);
-
- if (y < 0 || y >= limit)
- {
- return null;
- }
- else
- {
- x = ((x % limit) + limit) % limit;
+function getArrowIcon() {
+ var size = new OpenLayers.Size(25, 22);
+ var offset = new OpenLayers.Pixel(-30, -27);
+ var icon = new OpenLayers.Icon("/images/arrow.png", size, offset);
- return this.url + z + "/" + x + "/" + y + "." + this.type;
- }
+ return icon;
}
function addMarkerToMap(position, icon, description) {
var marker = new OpenLayers.Marker(position, icon);
markers.addMarker(marker);
- markers.setVisibility(true);
if (description) {
marker.events.register("click", marker, function() { openMapPopup(marker, description) });
}
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>",
+ sizeMapPopup(description),
+ "<p style='padding-right: 28px'>" + description + "</p>",
marker.icon, true);
popup.setBackgroundColor("#E3FFC5");
map.addPopup(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);
+
+ var width = box.offsetWidth;
+ var height = box.offsetHeight;
+
+ document.body.removeChild(box);
+
+ return new OpenLayers.Size(width + 30, height + 24);
+}
+
function removeMarkerFromMap(marker){
markers.removeMarker(marker);
}
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