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// taken from http://stackoverflow.com/questions/901115/get-query-string-values-in-javascript
var urlParams = {};
(function () {
var e,
a = /\\+/g, // Regex for replacing addition symbol with a space
r = /([^&=]+)=?([^&]*)/g,
d = function (s) { return decodeURIComponent(s.replace(a, " ")); },
q = window.location.search.substring(1);
while (e = r.exec(q))
urlParams[d(e[1])] = d(e[2]);
})();
function mapsetup(divname, options) {
div = document.getElementById(divname);
if (options.fullscreen) {
permalink = 'permalink';
div.style.top = 0;
div.style.left = 0;
div.style.position = 'absolute';
div.style.width = '100%';
div.style.height = '100%';
}
else {
div.style.height = options.height;
div.style.width = options.width;
div.style.float = options.float;
permalink = {base: options.href, title: "View larger map"};
}
map = new OpenLayers.Map(divname, {
controls: [
new OpenLayers.Control.Navigation(),
new OpenLayers.Control.ScaleLine(),
new OpenLayers.Control.Permalink(permalink)
],
displayProjection: new OpenLayers.Projection("EPSG:4326"),
maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
projection: "EPSG:900913",
units: "m",
maxResolution: 156543.0339,
numZoomLevels: 19
});
for (x in options.layers) {
layer = options.layers[x];
console.log("setting up layer: " + layer);
if (layer.indexOf("Google") >= 0) {
if (options.google_apikey && options.google_apikey != 'null') {
var gtype = G_NORMAL_MAP;
if (layer.indexOf("Satellite") >= 0) {
gtype = G_SATELLITE_MAP;
} else if (layer.indexOf("Hybrid") >= 0) {
gtype = G_HYBRID_MAP // the normal map overlaying the satellite photographs
} else if (layer.indexOf("Physical") >= 0) {
gtype = G_PHYSICAL_MAP // terrain information
}
// this nightmare is possible through http://docs.openlayers.org/library/spherical_mercator.html
googleLayer = new OpenLayers.Layer.Google(
layer,
{type: gtype,
'sphericalMercator': true,
'maxExtent': new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
projection: new OpenLayers.Projection("EPSG:3857")}
);
map.addLayer(googleLayer);
} else {
console.log("no API key defined for Google layer, skipping");
}
} else if (layer == 'OSM') { // OSM default layer
map.addLayer(new OpenLayers.Layer.OSM("OSM (Mapnik)"));
} else { // assumed to be a URL
text = layer.match(/([^.\/]*\.[^.\/]*(\/[^\$]*)?)\/.*$/i) // take the first two parts of the FQDN and everything before the first $
map.addLayer(new OpenLayers.Layer.OSM("OSM (" + text[1] + ")", layer));
}
}
if (options.format == 'CSV') {
pois = new OpenLayers.Layer.Text( "CSV",
{ location: options.csvurl,
projection: new OpenLayers.Projection("EPSG:4326")
});
} else if (options.format == 'GeoJSON') {
pois = new OpenLayers.Layer.Vector("GeoJSON", {
protocol: new OpenLayers.Protocol.HTTP({
url: options.jsonurl,
format: new OpenLayers.Format.GeoJSON()
}),
strategies: [new OpenLayers.Strategy.Fixed()],
projection: new OpenLayers.Projection("EPSG:4326")
});
} else {
pois = new OpenLayers.Layer.Vector("KML", {
protocol: new OpenLayers.Protocol.HTTP({
url: options.kmlurl,
format: new OpenLayers.Format.KML({
extractStyles: true,
extractAttributes: true
})
}),
strategies: [new OpenLayers.Strategy.Fixed()],
projection: new OpenLayers.Projection("EPSG:4326")
});
}
map.addLayer(pois);
select = new OpenLayers.Control.SelectFeature(pois);
map.addControl(select);
select.activate();
pois.events.on({
"featureselected": function (event) {
var feature = event.feature;
var content = '<h2><a href="' + feature.attributes.href + '">' +feature.attributes.name + "</a></h2>" + feature.attributes.description;
popup = new OpenLayers.Popup.FramedCloud("chicken",
feature.geometry.getBounds().getCenterLonLat(),
new OpenLayers.Size(100,100),
content,
null, true, function () {select.unselectAll()});
feature.popup = popup;
map.addPopup(popup);
},
"featureunselected": function (event) {
var feature = event.feature;
if (feature.popup) {
map.removePopup(feature.popup);
feature.popup.destroy();
delete feature.popup;
}
}
});
if (options.editable) {
vlayer = new OpenLayers.Layer.Vector( "Editable" );
map.addControl(new OpenLayers.Control.EditingToolbar(vlayer));
map.addLayer(vlayer);
}
if (options.fullscreen) {
map.addControl(new OpenLayers.Control.PanZoomBar());
map.addControl(new OpenLayers.Control.LayerSwitcher());
map.addControl(new OpenLayers.Control.MousePosition());
map.addControl(new OpenLayers.Control.KeyboardDefaults());
} else {
map.addControl(new OpenLayers.Control.ZoomPanel());
}
//Set start centrepoint and zoom
if (!options.lat || !options.lon) {
options.lat = urlParams['lat'];
options.lon = urlParams['lon'];
}
if (!options.zoom) {
options.zoom = urlParams['zoom'];
}
if (options.lat && options.lon) {
var lat = options.lat;
var lon = options.lon;
var zoom= options.zoom || 10;
center = new OpenLayers.LonLat( lon, lat ).transform(
new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
map.getProjectionObject() // to Spherical Mercator Projection
);
map.setCenter (center, zoom);
} else {
pois.events.register("loadend", this, function () { map.zoomToExtent(pois.getDataExtent()); });
}
}
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