Source: http://radar.oreilly.com/archives/2007/05/geocommons_shar.html

GeoCommons, Share Your GeoData

Posted: 23 May 2007 01:59 PM CDT

By Brady Forrest

GeoCommons is a new mapping site that allows members to use a variety of datasets to create their own maps. It provides the free geodata, a map builder tool,the ability to create heat maps, and a map hosting site. An API will be available shortly. GeoCommons comes from FortiusOne, a Washington, D.C. company. The public Beta is going to be releasedWhere 2.0's launchpad. Monday, May 28th, at Where 2.0's launchpad.

When building a map you can use one of the 1500 data sets (with 2 billion data attributes) that they have made freely available. The data sets vary widely and include things like "Identity Theft 2006", "Coral Reef Bleaching - Worldwide", "Starbucks Locations - Worldwide", and "HAZUS - Seattle, WA - Resident Demographics". As you can see below, data can be viewed in a tabular format prior to loading it onto a map. Data sets can be combined together so that you can see "The Prices of Living in NYC & SF" and "Barack vs. Clinton - Show Me the Money! " -- it seems to me that Barack has more widespread support.