diff --git a/public/javascripts/map.js b/public/javascripts/map.js
index 0dadbb9d3..bc2e90863 100644
--- a/public/javascripts/map.js
+++ b/public/javascripts/map.js
@@ -19,7 +19,7 @@ function createMap(divName, options) {
          new OpenLayers.Control.ScaleLine()
       ],
       units: "m",
-      maxResolution: 156543,
+      maxResolution: 156543.0339,
       numZoomLevels: 20
    });
 
diff --git a/public/openlayers/OpenStreetMap.js b/public/openlayers/OpenStreetMap.js
index c2acf2e0c..d6bc397d1 100644
--- a/public/openlayers/OpenStreetMap.js
+++ b/public/openlayers/OpenStreetMap.js
@@ -48,8 +48,8 @@ OpenLayers.Layer.OSM = OpenLayers.Class(OpenLayers.Layer.TMS, {
     initialize: function(name, url, options) {
         options = OpenLayers.Util.extend({
             attribution: "Data by <a href='http://openstreetmap.org/'>OpenStreetMap</a>",
-            maxExtent: new OpenLayers.Bounds(-20037508,-20037508,20037508,20037508),
-            maxResolution: 156543,
+            maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
+            maxResolution: 156543.0339,
             units: "m",
             projection: "EPSG:900913",
             transitionEffect: "resize"