# br_ibge_README.txt

The files in this section result from the conversion of datasets originating
from [Instituto Brasileiro de Geografia e Estatistica - IBGE](https://www.ibge.gov.br/)

## Included grids

### Brazil: Corrego Alegre 1961 (EPSG:5524) to SIRGAS 2000 (EPSG:4674)

*Source*: [IBGE, ProGrid](ftp://geoftp.ibge.gov.br/informacoes_sobre_posicionamento_geodesico/sirgas/aplicativos/transformacao_coordenadas)  
*Format*: GeoTIFF converted from NTv2  
*License*: [Creative Commons Attribution Share-Alike 4.0](https://creativecommons.org/licenses/by-sa/4.0/)

* br_ibge_CA61_003.tif

### Brazil: Corrego Alegre 1970-72 (EPSG:4225) to SIRGAS 2000 (EPSG:4674)

*Source*: [IBGE, ProGrid](ftp://geoftp.ibge.gov.br/informacoes_sobre_posicionamento_geodesico/sirgas/aplicativos/transformacao_coordenadas)  
*Format*: GeoTIFF converted from NTv2  
*License*: [Creative Commons Attribution Share-Alike 4.0](https://creativecommons.org/licenses/by-sa/4.0/)

* br_ibge_CA7072_003.tif

### Brazil: SAD69 (EPSG:4618) to SIRGAS 2000 (EPSG:4674)

*Source*: [IBGE, ProGrid](ftp://geoftp.ibge.gov.br/informacoes_sobre_posicionamento_geodesico/sirgas/aplicativos/transformacao_coordenadas)  
*Format*: GeoTIFF converted from NTv2  
*License*: [Creative Commons Attribution Share-Alike 4.0](https://creativecommons.org/licenses/by-sa/4.0/)

* br_ibge_SAD69_003.tif

### Brazil: SAD69(96) (EPSG:5527) to SIRGAS 2000 (EPSG:4674)

*Source*: [IBGE, ProGrid](ftp://geoftp.ibge.gov.br/informacoes_sobre_posicionamento_geodesico/sirgas/aplicativos/transformacao_coordenadas)  
*Format*: GeoTIFF converted from NTv2  
*License*: [Creative Commons Attribution Share-Alike 4.0](https://creativecommons.org/licenses/by-sa/4.0/)

* br_ibge_SAD96_003.tif