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Start Over You searched for: Subject Counties Remove constraint Subject: Counties Place Massachusetts Remove constraint Place: Massachusetts Place Alabama Remove constraint Place: Alabama Place Alaska Remove constraint Place: Alaska Place Delaware Remove constraint Place: Delaware Data type Polygon Remove constraint Data type: Polygon Year 1990 Remove constraint Year: 1990

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1. County Boundaries of the United States, 1990

Polygon Stanford University Public content
1990. Geological Survey (U.S.). This polygon shapefile portrays the 1990 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).