The video presented here requires JavaScript to be enabled and the latest version of the Macromedia Flash Player. If you are you using a browser with JavaScript disabled please enable it now. Otherwise, please update your version of the free Flash Player by downloading here.

You can draw a polygon on the map to set the bounding area for your query. Start the polygon tool (). Left click (no dragging) adds points to the polygon while right click or ESC key finalize the polygon. icon deactivates the tool.