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1. Historical United States County Boundaries, 1790

Polygon Stanford University Restricted content
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.

2. Massachusetts Town Population, 1765 - 1990

Polygon Harvard University Public content
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...