22521=PROJCS["Corrego Alegre 1970-72 / UTM zone 21S",GEOGCS["Corrego Alegre 1970-72",DATUM["Corrego_Alegre_1970-72",SPHEROID["International 1924",6378388,297],EXTENSION["PROJ4_GRIDS","CA7072_003.gsb"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4225"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-57],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",10000000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","22521"]]