PUBLIC MARKS from hobbes with tag gis

If you want to display complicated path data on a Google Map, the most efficient way to do so is with an encoded polyline or polygon. * Encoding form: Convert path data to the encoded format. Can generate code or a map. * Point and click: A Google Map containing a point and click interface to the encoding algorithm. * Decoder: Decode an encoded point string to obtain a sequence of lat/lng values.