diff --git a/lib/OpenLayers/Layer.js b/lib/OpenLayers/Layer.js
index fa5f4c4122..db597c87b3 100644
--- a/lib/OpenLayers/Layer.js
+++ b/lib/OpenLayers/Layer.js
@@ -233,6 +233,36 @@ OpenLayers.Layer.prototype = {
                          extent.getHeight() / viewSize.h );
     },
     
+    /** Calculates using px-> lonlat translation functions on tl and br 
+     *   corners of viewport
+     * 
+     * @returns A Bounds object which represents the lon/lat bounds of the 
+     *          current viewPort.
+     * @type OpenLayers.Bounds
+     */
+    getExtent: function () {
+        var extent = null;
+        
+        
+        var size = this.map.getSize();
+        
+        var tlPx = new OpenLayers.Pixel(0,0);
+        var tlLL = this.getLonLatFromViewPortPx(tlPx);
+
+        var brPx = new OpenLayers.Pixel(size.w, size.h);
+        var brLL = this.getLonLatFromViewPortPx(brPx);
+        
+        if ((tlLL != null) && (brLL != null)) {
+            extent = new OpenLayers.Bounds(tlLL.lon, 
+                                       brLL.lat, 
+                                       brLL.lon, 
+                                       tlLL.lat);
+        }
+
+        return extent;
+    },
+
+    
     /**
     * @param {OpenLayers.Pixel} viewPortPx
     *
@@ -277,47 +307,7 @@ OpenLayers.Layer.prototype = {
         // this should be implemented by subclasses
     },
 
-    /**
-     * @returns A Bounds object which represents the lon/lat bounds of the 
-     *          current viewPort.
-     * @type OpenLayers.Bounds
-     */
-    getExtent: function () {
-        // this should be implemented by subclasses
-        var extent = null;
 
-        var center = this.map.getCenter();
-        if (center != null) {
-
- 	            var res = this.getResolution();
- 	            var size = this.map.getSize();
- 	            var w_deg = size.w * res;
- 	            var h_deg = size.h * res;
-
- 	            return new OpenLayers.Bounds(center.lon - w_deg / 2,
-                         	                 center.lat - h_deg / 2,
-                         	                 center.lon + w_deg / 2,
-                          	                 center.lat + h_deg / 2);
-
-        }
-
-        return extent;
-/** ALT CALCULATION FOR GETEXTENT 
-
-            var size = this.getSize();
-            
-            var tlPx = new OpenLayers.Pixel(0,0);
-            var tlLL = this.getLonLatFromViewPortPx(tlPx);
-    
-            var brPx = new OpenLayers.Pixel(size.w, size.h);
-            var brLL = this.getLonLatFromViewPortPx(brPx);
-            
-            extent = new OpenLayers.Bounds(tlLL.lon, 
-                                           brLL.lat, 
-                                           brLL.lon, 
-                                           tlLL.lat);
-**/
-    },
 
     /** @final @type String */
     CLASS_NAME: "OpenLayers.Layer"
diff --git a/lib/OpenLayers/Layer/Grid.js b/lib/OpenLayers/Layer/Grid.js
index f25558961e..f75e0668dd 100644
--- a/lib/OpenLayers/Layer/Grid.js
+++ b/lib/OpenLayers/Layer/Grid.js
@@ -263,6 +263,33 @@ OpenLayers.Layer.Grid.prototype =
         return maxRes / Math.pow(2, zoom);
     },
     
+    /** Calculates based on resolution, center, and mapsize
+     * 
+     * @returns A Bounds object which represents the lon/lat bounds of the 
+     *          current viewPort.
+     * @type OpenLayers.Bounds
+     */
+    getExtent: function () {
+        var extent = null;
+
+        var center = this.map.getCenter();
+        if (center != null) {
+
+ 	            var res = this.getResolution();
+ 	            var size = this.map.getSize();
+ 	            var w_deg = size.w * res;
+ 	            var h_deg = size.h * res;
+
+ 	            return new OpenLayers.Bounds(center.lon - w_deg / 2,
+                         	                 center.lat - h_deg / 2,
+                         	                 center.lon + w_deg / 2,
+                          	                 center.lat + h_deg / 2);
+
+        }
+
+        return extent;
+    },
+    
     /**
      * @param {OpenLayers.Bounds} bounds
      *