1940. Instituto Brasileiro de Geografia e Estatística. This polygon shapefile represents the disputed boundaries of Brazil in 1940. These data were created using a custom World Polyconic projection. Thi... Instituto Brasileiro de Geografia e Estatística.
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1950. Instituto Brasileiro de Geografia e Estatística. This polygon shapefile represents the disputed boundaries of Brazil in 1950. These data were created using a custom World Polyconic projection. Thi... Instituto Brasileiro de Geografia e Estatística.
1970. Instituto Brasileiro de Geografia e Estatística. This polygon shapefile represents the disputed boundaries of Brazil in 1970. These data were created using a custom World Polyconic projection. Thi... Instituto Brasileiro de Geografia e Estatística.
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.
1991. Instituto Brasileiro de Geografia e Estatística. This polygon shapefile represents disputed boundaries of Brazil in 1991. These data were created using a custom World Polyconic projection. This la... Instituto Brasileiro de Geografia e Estatística.