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Policy Map logo

Blending geographic information system (GIS) mapping features with an easy-to-use interface and a plethora of health, economic, and social welfare data from government and private sources, “PolicyMap is a web-based tool for mapping US data

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Library of Congress logo

The Sanborn map collection consists of a uniform series of large-scale maps, dating from 1867 to the present and depicting the commercial, industrial, and residential sections of some twelve thousand cities and towns in the United States, Canada,

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