added aprs.fi coverage overlay (selfhost tiles)

Author: rossengeorgiev

.gitignore

@@ -4,3 +4,4 @@ js/mobile.js
 js/init_plot.js
 css/mobile.css
 cache.manifest
+tiles/

index.html

@@ -153,6 +153,13 @@ <h4>Overlays</h4>
                     <input type="checkbox" id="opt_daylight">
                 </div>
             </div>
+            <div class="row option">
+                <span><b>APRS coverage</b></span>
+                <div class="switch off" id="sw_layers_aprs">
+                    <span class="thumb"></span>
+                    <input type="checkbox" id="opt_layers_aprs">
+                </div>
+            </div>
             <div class="row option">
                 <span><b>Cloud layer</b></span>
                 <div class="switch off" id="sw_layers_clouds">

js/app.js

@@ -574,6 +574,7 @@ $(window).ready(function() {
     // list of all switches
     var opts = [
         "#sw_layers_clouds",
+        "#sw_layers_aprs",
         "#sw_offline",
         "#sw_station",
         "#sw_imperial",
@@ -640,6 +641,10 @@ $(window).ready(function() {
                     $('#lookanglesbox').css({top:'40px'});
                 }
                 break;
+            case "opt_layers_aprs":
+                if(on) map.overlayMapTypes.setAt("1", overlayAPRS);
+                else map.overlayMapTypes.setAt("1", null);
+                break;
             case "opt_layers_clouds":
                 if(on) { layers_clouds.setMap(map); }
                 else { layers_clouds.setMap(null); }

js/tracker.js

@@ -85,6 +85,15 @@ var plot_options = {
     ]
 };
 
+// aprs overlay
+var overlayAPRS = new google.maps.ImageMapType({
+    getTileUrl: function(coord, zoom) {
+        var n = Math.pow(2,zoom);
+        return (coord.y<0 || coord.y>=n || zoom > 5) ? null : "tiles/aprs/tile_"+zoom+"_"+wrapTiles(coord.x,zoom)+"_"+coord.y+".png";
+    },
+    tileSize: new google.maps.Size(256,256)
+});
+
 // weather
 var weatherOverlayId = "nexrad-n0q-900913";
 var weatherOverlay = new google.maps.ImageMapType({
@@ -384,6 +393,9 @@ function load() {
     // initialize clouds layer
     layers_clouds = new google.maps.weather.CloudLayer();
     if(offline.get('opt_layers_clouds')) layers_clouds.setMap(map);
+
+    // load if aprs layer, if selected
+    if(offline.get('opt_layers_aprs')) map.overlayMapTypes.setAt("1", overlayAPRS);
 }
 
 function unload() {