> library(maptools)

> mapa1 <- readShapeSpatial("BRA_adm1.shp")

> mapa1@data$NAME_1

[1] Acre Alagoas Amap\xe1 Amazonas

[5] Bahia Cear\xe1 Distrito Federal Esp\xedrito Santo

[9] Goi\xe1s Maranh\xe3o Mato Grosso do Sul Mato Grosso

[13] Minas Gerais Par\xe1 Para\xedba Paran\xe1

[17] Pernambuco Piau\xed Rio de Janeiro Rio Grande do Norte

[21] Rio Grande do Sul Rond\xf4nia Roraima Santa Catarina

[25] S\xe3o Paulo Sergipe Tocantins

27 Levels: Acre Alagoas Amap\xe1 Amazonas Bahia Cear\xe1 Distrito Federal ... Tocantins

> sessionInfo()

R version 3.1.3 (2015-03-09)

Platform: x86_64-apple-darwin13.4.0 (64-bit)

Running under: OS X 10.10.4 (Yosemite)

locale:

[1] pt_BR.UTF-8/pt_BR.UTF-8/pt_BR.UTF-8/C/pt_BR.UTF-8/pt_BR.UTF-8

attached base packages:

[1] stats graphics grDevices utils datasets methods base

other attached packages:

[1] maptools_0.8-34 sp_1.1-0

loaded via a namespace (and not attached):

[1] foreign_0.8-63 grid_3.1.3 lattice_0.20-30 tools_3.1.3