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National Geospatial Digital Archive
The National Geospatial Digital Archive is an archive funded by the Library of Congress, University of California Santa Barbara, and Stanford University. From the first colonial maps to the satellite imagery of the 21st century, cartographic information has helped define and frame our view of the United States.
Information are taken from Wikipedia, the open encyclopedia, to which contribute many volunteers from around the whole world. Texts are available under the following conditions GNU Free Documentation License.
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