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[rails.git] / app / assets / javascripts / osm.js.erb

diff --git a/app/assets/javascripts/osm.js.erb b/app/assets/javascripts/osm.js.erb
index e429f4479f143dfe2d50622b870d62d60558a263..e9c09c79f9ae995575030ad9231167c64983f974 100644 (file)
--- a/app/assets/javascripts/osm.js.erb
+++ b/app/assets/javascripts/osm.js.erb
@@ -1,5 +1,6 @@
 //= depend_on settings.yml
 //= depend_on settings.local.yml
+//= depend_on layers.yml
 //= depend_on key.yml
 //= require qs/dist/qs
 
@@ -30,6 +31,7 @@ OSM = {
   TRACESTRACK_KEY:         <%= Settings.tracestrack_key.to_json %>,
 <% end %>
 
+  LAYER_DEFINITIONS:       <%= YAML.load_file(Rails.root.join("config/layers.yml")).to_json %>,
   LAYERS_WITH_MAP_KEY:     <%= YAML.load_file(Rails.root.join("config/key.yml")).keys.to_json %>,
 
   MARKER_GREEN:            <%= image_path("marker-green.png").to_json %>,
@@ -204,7 +206,9 @@ OSM = {
   },
 
   zoomPrecision: function(zoom) {
-    return Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+    var pixels = Math.pow(2, 8 + zoom);
+    var degrees = 180;
+    return Math.ceil(Math.log10(pixels / degrees));
   },
 
   locationCookie: function(map) {