University of California
Us Geological Survey: Cartogram Central
The USGS offers detailed information on Types of Cartograms, Congressional Districts, Software for Cartograms, Publications, and a Carto-Gallery.
US Geological Survey
U.s. Geological Survey
The U.S. Geological Survey reports on the latest news affecting the earth today, as well as providing a wealth of data, reports, and information.
Library of Congress
Loc: Map Collections 1500 2002
This collection provides maps dating back to 1500 up to the present. The collection includes: cities, towns, discovery and exploration, conservation and environment, military battles, cultural landscapes, transportation, communication,...