code: function(geometry) {
          var node = this.createElementNS(this.namespaces.gpx, "wpt");
          node.setAttribute("lon", geometry.x);
          node.setAttribute("lat", geometry.y);
          return node;
      }
docs: Method: buildWptNode
  Builds a wpt node given a point
  
  Parameters:
  geometry - {<OpenLayers.Geometry.Point>}
  
  Returns:
  {DOMElement} A wpt node