Drupal is a usually known as a content management system in which to store your information, but did you know it can also help you visualize that data on a geocoded map? By using such technologies as MapBox, OpenLayers, GeoTaxonomy, and KML it is possible to use Drupal to make powerful and interactive representations of your data without writing any code. Learn from Matt Cheney of Chapter Three how he uses Drupal to do mapping with examples from the United Nations and People’s Vegan Donuts in Berkeley.
Matt Cheney is Managing Partner and Drupal Strategist at Chapter Three, a San Francisco based Web development company specializing in Drupal and open source software. Matt served as a political consultant for campaigns and causes, developed online information systems to help connect attorneys in the California Death Penalty defense community, and worked as a researcher at the National Center for SuperComputing Applications, developing communities for online learning. He holds a B.A. in Philosophy, History, Religious Studies, and Political Science and a M.S. in Library and Information Science from the University of Illinois at Urbana-Champaign.
Examples of maps
List of modules
http://drupal.org/project/placemaker - yahoo placemaker