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1. American Indian Reservations, Arizona, 1980

1980. University of Arizona. Library. Statewide coverage of 1980 American Indian Reservations. Boundaries that cross into the adjacent states are included. Population data from U.S. Bur... University of Arizona.

2. 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.).

3. 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.

4. 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.

5. Political Districts and Boundaries: Illinois, 2006 and 2007

1980. Various, by feature class. This feature dataset contains data layers that show political districts and boundaries in Illinois, including political townships, state representa...

6. 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.