X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/ffda8d7ac5ca4f40a1211225dd3e1c898fc232a8..d975100504a87788df9386ceee455e76ebfade64:/app/assets/javascripts/osm.js.erb

diff --git a/app/assets/javascripts/osm.js.erb b/app/assets/javascripts/osm.js.erb
index e429f4479..e08528f84 100644
--- a/app/assets/javascripts/osm.js.erb
+++ b/app/assets/javascripts/osm.js.erb
@@ -204,7 +204,9 @@ 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) {