Search Constraints
You searched for:
Place
California
Remove constraint Place: California
Place
Nevada
Remove constraint Place: Nevada
Data type
Polygon
Remove constraint Data type: Polygon
Year
1920
Remove constraint Year: 1920
1 entry found
Search Results
1. Historical United States County Boundaries, 1920
1920. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1920. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.