You searched for: Subject Counties Remove constraint Subject: Counties Institution Stanford Remove constraint Institution: Stanford Place Arizona Remove constraint Place: Arizona Place Delaware Remove constraint Place: Delaware Place Alaska Remove constraint Place: Alaska Data type Polygon Remove constraint Data type: Polygon Year 1990 Remove constraint Year: 1990
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.).