Good Google Maps API Tutorial
Thanks to the Blackpool Community Church Javascript Team and Francois Bar's current fascination with using Google's Map API to visualize his microlocal LA research project, I'm adding another Google Maps API Tutorial/How To.
Probably the more interesting thing here is an example that shows how to consume an external XML data document and use that to draw polylines on a map. This is useful, particularly because it avoids the nasty tendency of hard coding your data within your algorithms. That's generally a no-no. You want to have your algorithms process arbitrary data, and have the data live within a separate "tier", as it's often described. Sometimes that data lives in a SQL database like MySQL, and sometimes it's just more convenient to put it in a structured, human-readable file like an XML document.
http://www.econym.demon.co.uk/googlemaps/