source: src/django_gheat/website/static/heatmap.js@ 9250

var map;
function init(){

        var projection_wgs = new OpenLayers.Projection("EPSG:4326"); // WGS 1984

        map = new OpenLayers.Map('heatmap', {
                controls: [
                                new OpenLayers.Control.Navigation(),
                                //new OpenLayers.Control.PanZoomBar(),
                                //new OpenLayers.Control.ScaleLine(),
                                new OpenLayers.Control.LayerSwitcher(),
                                new OpenLayers.Control.MousePosition({ 'displayProjection' : projection_wgs }),
                ],
                maxExtent: new OpenLayers.Bounds(-20037508.3427892,-20037508.3427892,20037508.3427892,20037508.3427892), 
                numZoomLevels:16, 
                maxResolution:156543.0339, 
                units:'m', 
                projection: "EPSG:900913",
                displayProjection: new OpenLayers.Projection("EPSG:4326")
        });

        map.events.register('click', map, GetMousePos);
        function GetMousePos(pos) {
                var pix = map.getLonLatFromPixel(new OpenLayers.Pixel(pos.xy.x,pos.xy.y));
                var mousepos = OpenLayers.Layer.SphericalMercator.inverseMercator(pix.lon, pix.lat);
                var zoomlevel = map.getZoom();
                getNodeList(zoom, mousepos);
        }

        layerMapnik = new OpenLayers.Layer.OSM.Mapnik("Mapnik");
        map.addLayer(layerMapnik);

        layerHeatmap2 = new OpenLayers.Layer.OSM.Overlay2("All Access points", {isBaseLayer: false, visibility: true});
        map.addLayer(layerHeatmap2);

        layerHeatmap3 = new OpenLayers.Layer.OSM.Overlay3("Wireless Leiden Only", {isBaseLayer: false, visibility: true});
        map.addLayer(layerHeatmap3);

        layerHeatmap = new OpenLayers.Layer.OSM.Overlay1("Original Heatmap generator", {isBaseLayer: false, visibility: false});
        map.addLayer(layerHeatmap);
        
        var lon   = 4.48319;
        var lat   = 52.14068;
        var zoom  = 16;

        var lonLat = new OpenLayers.LonLat(lon, lat).transform(new OpenLayers.Projection("EPSG:4326"), map.getProjectionObject());
        map.setCenter (lonLat, zoom);
}