Cartographer.js – thematic mapping for Google MapsThematic mapping library for Google Maps Download This is an early stage release. While reasonably stable, you can expect that future versions will contain functionality and API changes. Download v 0.1 Alpha Cartographer.js is licensed under the MIT license. Feedback, bugs, and feature requests can be recorded at the Google Code project page. Demos 10,000 random Twitter users – area-scaled circles
