Digital Maps
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Old Maps OnlineOldMapsOnline.org indexes over 400.000 maps from archives and libraries worldwide. Combines searches from several sources, including USGS topographic maps.
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USGS TopoViewTopoView includes current and historic maps produced by the United States Geological Survey. This one-stop shop allows you to search for specific locals and view all available maps in one place.
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Historical Maps of the United States: Perry-Castañeda Library Map CollectionAccess a variety of maps of North America from the 19th and 20th centuries digitized by the University of Texas at Austin.
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David Rumsey Map CollectionThis collection has over 55,000 maps and images. It focuses on 18th and 19th century maps of North and South America, but also covers other parts of the world.
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Historical Map Archive, University of AlabamaExtensive collection of U.S. and international maps digitized as JPEG images. Grouped by location and publication date.
