changes url for aprs tiles to the new subdomain

Author: rossengeorgiev

js/tracker.js

@@ -109,7 +109,12 @@ var plot_options = {
 var overlayAPRS = new google.maps.ImageMapType({
     getTileUrl: function(coord, zoom) {
         var n = Math.pow(2,zoom);
-        return (coord.y<0 || coord.y>=n || zoom > 6) ? null : "http://habhub.org/tiles/aprs/tile_"+zoom+"_"+wrapTiles(coord.x,zoom)+"_"+coord.y+".png";
+        return (coord.y<0 || coord.y>=n || zoom > 6) ? null : "http://" +
+                                                              ['a','b','c'][Math.abs(coord.x+coord.y)%3] +
+                                                              ".tiles.tracker.habhub.org/aprs/tile_" +
+                                                              zoom + "_" +
+                                                              wrapTiles(coord.x,zoom) + "_" +
+                                                              coord.y + ".png";
     },
     tileSize: new google.maps.Size(256,256)
 });