National Historical Geographic Information System (NHGIS)

National Historical Geographic Information System (NHGIS)
The IPUMS (https://www.ipums.org/) National Historical Geographic Information System (NHGIS) provides free online access to summary statistics and GIS boundary files for U.S. censuses and other nationwide surveys from 1790 through the present. (PDF Introduction - https://www.nhgis.org/sites/www.nhgis.org/files/using_the_nhgis_data_finder.pdf)


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Further Resources
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Geography & the Environment
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