EPSG:20823 — Aratu / UTM zone 23S

PROJCRS[
    "Aratu / UTM zone 23S",
    BASEGEOGCRS[
        "Aratu",
        DATUM[
            "Aratu",
            ELLIPSOID[
                "International 1924",
                6378388,
                297,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7022]
            ],
            ID["EPSG",6208]
        ],
        ID["EPSG",4208]
    ],
    CONVERSION[
        "UTM zone 23S",
        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",
            -45,
            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",16123]
    ],
    CS[Cartesian,2,ID["EPSG",4400]],
    AXIS["Easting (E)",east],
    AXIS["Northing (N)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",20823]
]

+proj=utm +zone=23 +south +ellps=intl +towgs84=-151.99,287.04,-147.45,0,0,0,0 +units=m +no_defs +type=crs

proj4.defs("EPSG:20823", "+proj=utm +zone=23 +south +ellps=intl +towgs84=-151.99,287.04,-147.45,0,0,0,0 +units=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 20823,
  "name": "Aratu / UTM zone 23S",
  "kind": "projected",
  "area": "Brazil - 48°W to 42°W and Aratu",
  "unit": "metre",
  "bbox": [
    -33.5,
    -48.01,
    0,
    -41.99
  ],
  "proj4": "+proj=utm +zone=23 +south +ellps=intl +towgs84=-151.99,287.04,-147.45,0,0,0,0 +units=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (20823, 'EPSG', 20823, '+proj=utm +zone=23 +south +ellps=intl +towgs84=-151.99,287.04,-147.45,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["Aratu / UTM zone 23S",GEOGCS["Aratu",DATUM["Aratu",SPHEROID["International 1924",6378388,297],TOWGS84[-151.99,287.04,-147.45,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4208"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-45],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","20823"]]');

PROJECTION
  "+proj=utm"
  "+zone=23"
  "+south"
  "+ellps=intl"
  "+towgs84=-151.99,287.04,-147.45,0,0,0,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

20823=PROJCS["Aratu / UTM zone 23S",GEOGCS["Aratu",DATUM["Aratu",SPHEROID["International 1924",6378388,297],TOWGS84[-151.99,287.04,-147.45,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4208"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-45],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","20823"]]