1790. Earle, Carville, Heppen, John, Otterstrom, Samuel, Cao, Changyong, and Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology. This polygon shapefile contains county boundaries for the United States in 1790. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.
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1765. Harvard Map Collection, US Census Bureau, Massachusetts Institute for Social and Economic Research, University of Massachusetts, and Massachusetts Office of Geographic and Environmental Information (MassGIS). This datalayer is a polygon coverage which will display Massachusetts towns and associated historical population data. Total population per town is...
