Historical Maps
- Digital Atlas of Roman and Medieval Civilizations (Beta) (Harvard University) GIS approach.
- Historical Atlas of the 20th Century
Eclectic collection, covering diverse topics. - Library of Congress Online Map Collection Excellent source for digital maps about cities, the environment, military history, transportation and other topics.
(Institute for Historical Research, UK) A major, highly recommended gateway to the history of cartography - Perry-Castaneda Library Map Collection (University of Texas) Large collection of digitized, online historical maps.
