EPSG:22521 — Corrego Alegre 1970-72 / UTM zone 21S

PROJCRS[
    "Corrego Alegre 1970-72 / UTM zone 21S",
    BASEGEOGCRS[
        "Corrego Alegre 1970-72",
        DATUM[
            "Corrego Alegre 1970-72",
            ELLIPSOID[
                "International 1924",
                6378388,
                297,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7022]
            ],
            ID["EPSG",6225]
        ],
        ID["EPSG",4225]
    ],
    CONVERSION[
        "UTM zone 21S",
        METHOD["Transverse Mercator",ID["EPSG",9807]],
        PARAMETER[
            "Latitude of natural origin",
            0,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8801]
        ],
        PARAMETER[
            "Longitude of natural origin",
            -57,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8802]
        ],
        PARAMETER[
            "Scale factor at natural origin",
            0.9996,
            SCALEUNIT["unity",1,ID["EPSG",9201]],
            ID["EPSG",8805]
        ],
        PARAMETER[
            "False easting",
            500000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            10000000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",16121]
    ],
    CS[Cartesian,2,ID["EPSG",4400]],
    AXIS["Easting (E)",east],
    AXIS["Northing (N)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",22521]
]

+proj=utm +zone=21 +south +ellps=intl +nadgrids=CA7072_003.gsb +units=m +no_defs +type=crs

proj4.defs("EPSG:22521", "+proj=utm +zone=21 +south +ellps=intl +nadgrids=CA7072_003.gsb +units=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 22521,
  "name": "Corrego Alegre 1970-72 / UTM zone 21S",
  "kind": "projected",
  "area": "Brazil - west of 54°W and south of 18°S",
  "unit": "metre",
  "bbox": [
    -31.91,
    -58.16,
    -17.99,
    -54
  ],
  "proj4": "+proj=utm +zone=21 +south +ellps=intl +nadgrids=CA7072_003.gsb +units=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (22521, 'EPSG', 22521, '+proj=utm +zone=21 +south +ellps=intl +nadgrids=CA7072_003.gsb +units=m +no_defs +type=crs', '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"]]');

PROJECTION
  "+proj=utm"
  "+zone=21"
  "+south"
  "+ellps=intl"
  "+nadgrids=CA7072_003.gsb"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

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"]]