--- a/labs/openlayers/lib/OpenLayers/Layer/WorldWind.js
+++ b/labs/openlayers/lib/OpenLayers/Layer/WorldWind.js
@@ -1,1 +1,121 @@
+/* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for 
+ * full list of contributors). Published under the Clear BSD license.  
+ * See http://svn.openlayers.org/trunk/openlayers/license.txt for the
+ * full text of the license. */
 
+
+/**
+ * @requires OpenLayers/Layer/Grid.js
+ */
+
+/**
+ * Class: OpenLayers.Layer.WorldWind
+ * 
+ * Inherits from:
+ *  - <OpenLayers.Layer.Grid>
+ */
+OpenLayers.Layer.WorldWind = OpenLayers.Class(OpenLayers.Layer.Grid, {
+    
+    DEFAULT_PARAMS: {
+    },
+
+    /**
+     * APIProperty: isBaseLayer
+     * WorldWind layer is a base layer by default.
+     */
+    isBaseLayer: true,    
+
+    
+    /** 
+     * APIProperty: lzd
+     * LevelZeroTileSizeDegrees
+     */
+    lzd: null,
+
+    /**
+     * APIProperty: zoomLevels
+     * Number of zoom levels.
+     */
+    zoomLevels: null,
+    
+    /**
+     * Constructor: OpenLayers.Layer.WorldWind
+     * 
+     * Parameters:
+     * name - {String} Name of Layer
+     * url - {String} Base URL  
+     * lzd - {Float} Level zero tile size degrees 
+     * zoomLevels - {Int} number of zoom levels
+     * params - {Object} additional parameters
+     * options - {Object} additional options
+     */
+    initialize: function(name, url, lzd, zoomLevels, params, options) {
+        this.lzd = lzd;
+        this.zoomLevels = zoomLevels;
+        var newArguments = [];
+        newArguments.push(name, url, params, options);
+        OpenLayers.Layer.Grid.prototype.initialize.apply(this, newArguments);
+        this.params = OpenLayers.Util.applyDefaults(
+            this.params, this.DEFAULT_PARAMS
+        );
+    },
+    /**
+     * Method: addTile
+     * 
+     * Parameters:
+     * bounds - {<OpenLayers.Bounds>}
+     * position - {<OpenLayers.Pixel>}
+     * 
+     * Returns:
+     * {<OpenLayers.Tile.Image>} The added OpenLayers.Tile.Image
+     */
+    addTile:function(bounds,position) {
+        return new OpenLayers.Tile.Image(this, position, bounds, 
+                                             null, this.tileSize);
+    },
+
+    /**
+     * Method: getZoom
+     * Convert map zoom to WW zoom.
+     */
+    getZoom: function () {
+        var zoom = this.map.getZoom();
+        var extent = this.map.getMaxExtent();
+        zoom = zoom - Math.log(this.maxResolution / (this.lzd/512))/Math.log(2);
+        return zoom;
+    },
+
+    /**
+     * Method: getURL
+     *
+     * Parameters:
+     * bounds - {<OpenLayers.Bounds>} 
+     *
+     * Returns:
+     * {String} A string with the layer's url and parameters and also the 
+     *           passed-in bounds and appropriate tile size specified as 
+     *           parameters
+     */
+    getURL: function (bounds) {
+        bounds = this.adjustBounds(bounds);
+        var zoom = this.getZoom();
+        var extent = this.map.getMaxExtent();
+        var deg = this.lzd/Math.pow(2,this.getZoom());
+        var x = Math.floor((bounds.left - extent.left)/deg);
+        var y = Math.floor((bounds.bottom - extent.bottom)/deg);
+        if (this.map.getResolution() <= (this.lzd/512)
+            && this.getZoom() <= this.zoomLevels) {
+            return this.getFullRequestString(
+              { L: zoom, 
+                X: x,
+                Y: y
+              });
+        } else {
+            return OpenLayers.Util.getImagesLocation() + "blank.gif";
+        }
+
+    },
+
+    CLASS_NAME: "OpenLayers.Layer.WorldWind"
+});
+