Free JavaScript Library for creating Thematic Mapping For Google Maps, Cartographer

Thematic maps are very useful when describing statistical data about places. The data, simply, becomes much easier to understand.

Cartographer is a JavaScript library for creating thematic maps on Google Maps which supports custom styling.

It is only a one JavaScript file that relies on the powerful Raphael.js vector-graphics library.

It supports 3 visualizing types:

• Chloropleth (color coded regions)
• Pie charts
• Point clusters

The areas on maps are mentioned as latitudes or regions (depending on the type) which means no hacking or manual calculations.

Every visualization type comes with different options like colors, opacity, stroke & more.

P.S. The library is currently on alpha state but pretty solid.

Requirements: RaphaelJS JavaScript Library
Compatibility: All Major Browsers
Website: http://cartographer.visualmotive.com/
Download: http://code.google.com/p/cartographerjs/downloads/list