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1. County Boundaries of the United States, 1980

1980. Geological Survey (U.S.). This polygon shapefile contains the 1980 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).

2. Disputed Boundaries: Brasil, 1980

1980. Instituto Brasileiro de Geografia e Estatística. This polygon shapefile represents the disputed boundaries of Brazil in 1980. These data were created using a custom World Polyconic projection. Thi... Instituto Brasileiro de Geografia e Estatística.

3. Municipal Boundaries: Brasil, 1980

1980. Instituto Brasileiro de Geografia e Estatística. This point shapefile represents the municipal boundaries of Brazil in 1980. These data were created using a custom World Polyconic projection. This... Instituto Brasileiro de Geografia e Estatística.

4. State Boundaries: Brasil, 1980

1980. Instituto Brasileiro de Geografia e Estatística. This polygon shapefile contains the state boundaries of Brazil in 1980. These data were created using a custom World Polyconic projection. This lay... Instituto Brasileiro de Geografia e Estatística.