Improve map tile handling outside Great Britain.

1 files changed, 24 insertions, 5 deletions

diff --git a/web/js/map-bing-ol.js b/web/js/map-bing-ol.js
index 7d40f8afc..6f9916229 100644
--- a/web/js/map-bing-ol.js
+++ b/web/js/map-bing-ol.js
@@ -22,12 +22,30 @@ function set_map_config(perm) {
     if (fixmystreet.map_type) {
         tile_base = fixmystreet.map_type;
     }
-    fixmystreet.map_type = OpenLayers.Layer.Bing;
+    fixmystreet.map_type = OpenLayers.Layer.BingUK;
 }
 
-OpenLayers.Layer.Bing = OpenLayers.Class(OpenLayers.Layer.XYZ, {
+OpenLayers.Layer.BingUK = OpenLayers.Class(OpenLayers.Layer.XYZ, {
     attributionTemplate: '${logo}${copyrights}',
 
+    uk_bounds: [
+        new OpenLayers.Bounds(-6.6, 49.8, 1.102680, 51),
+        new OpenLayers.Bounds(-5.4, 51, 2.28, 54.94),
+        new OpenLayers.Bounds(-5.85, 54.94, -1.15, 55.33),
+        new OpenLayers.Bounds(-9.35, 55.33, -0.7, 60.98)
+    ],
+    in_uk: function(c) {
+        c = c.clone();
+        c.transform(
+            fixmystreet.map.getProjectionObject(),
+            new OpenLayers.Projection("EPSG:4326")
+        );
+        if ( this.uk_bounds[0].contains(c.lon, c.lat) || this.uk_bounds[1].contains(c.lon, c.lat) || this.uk_bounds[2].contains(c.lon, c.lat) || this.uk_bounds[3].contains(c.lon, c.lat) ) {
+            return true;
+        }
+        return false;
+    },
+
     setMap: function() {
         OpenLayers.Layer.XYZ.prototype.setMap.apply(this, arguments);
         this.updateAttribution();
@@ -98,14 +116,15 @@ OpenLayers.Layer.Bing = OpenLayers.Class(OpenLayers.Layer.XYZ, {
             this.map.getZoom() + this.zoomOffset;
 
         var url;
-        if (z >= 16) {
+        var in_uk = this.in_uk(bounds.getCenterLonLat());
+        if (z >= 16 && in_uk) {
             url = [];
             for (var i=0; i< tile_base[0].length; i++) {
                 url.push( tile_base[1].replace('{S}', tile_base[0][i]) + "/${z}/${x}/${y}.png" );
             }
         } else {
             var type = '';
-            if (z > 10) { type = '&productSet=mmOS'; }
+            if (z > 10 && in_uk) { type = '&productSet=mmOS'; }
             url = [
                 "//ecn.t0.tiles.virtualearth.net/tiles/r${id}.png?g=701" + type,
                 "//ecn.t1.tiles.virtualearth.net/tiles/r${id}.png?g=701" + type,
@@ -121,5 +140,5 @@ OpenLayers.Layer.Bing = OpenLayers.Class(OpenLayers.Layer.XYZ, {
         return path;
     },
 
-    CLASS_NAME: "OpenLayers.Layer.Bing"
+    CLASS_NAME: "OpenLayers.Layer.BingUK"
 });