USGS Release: Historical Maps Go Digital (4/19/2012 7:00:00 AM) - 0 views
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Mark Lindner on 15 May 12In keeping with that spirit, The U.S. Geological Survey (USGS) has publicly released more than 161,000 digitally scanned historical maps spanning in excess of 130 years and covering the conterminous lower 48 states. This Historical Topographic Map Collection provides a comprehensive repository of the landscape of our Nation and tracks changes through time, providing essential clues critical in the understanding of our Nation's topography, geography and development.