1      * bounds - {<OpenLayers.Bounds>} 2      * 3      * Returns: 4      * {String} A string with the layer‘s url and parameters and also the 5      *          passed-in bounds and appropriate tile size specified as 6      *          parameters 7      */ 8     getURL: function (bounds) { 9         var xyz = this.getXYZ(bounds);10         var url = this.url;11         if (OpenLayers.Util.isArray(url)) {12             var s = ‘‘ + xyz.x + xyz.y + xyz.z;13             url = this.selectUrl(s, url);14         }15         16         return OpenLayers.String.format(url, xyz);17     },18     19     /**20      * Method: getXYZ21      * Calculates x, y and z for the given bounds.22      *23      * Parameters:24      * bounds - {<OpenLayers.Bounds>}25      *26      * Returns:27      * {Object} - an object with x, y and z properties.28      */29     getXYZ: function(bounds) {30         var res = this.getServerResolution();31         var x = Math.round((bounds.left - this.maxExtent.left) /32             (res * this.tileSize.w));33         var y = Math.round((this.maxExtent.top - bounds.top) /34             (res * this.tileSize.h));35         var z = this.getServerZoom();36 37         if (this.wrapDateLine) {38             var limit = Math.pow(2, z);39             x = ((x % limit) + limit) % limit;40         }41 42         return {‘x‘: x, ‘y‘: y, ‘z‘: z};43     },