You searched for: Author Otterstrom, Samuel Remove constraint Author: Otterstrom, Samuel Author Cao, Changyong Remove constraint Author: Cao, Changyong Place United States Remove constraint Place: United States Place Maine Remove constraint Place: Maine Data type Polygon Remove constraint Data type: Polygon Year 1840 Remove constraint Year: 1840
1840. 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 1840. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.