EPSG:22643 — NAD83(CSRS)v6 / MTM zone 3

PROJCRS[
    "NAD83(CSRS)v6 / MTM zone 3",
    BASEGEOGCRS[
        "NAD83(CSRS)v6",
        DATUM[
            "North American Datum of 1983 (CSRS) version 6",
            ELLIPSOID[
                "GRS 1980",
                6378137,
                298.257222101,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7019]
            ],
            ANCHOREPOCH[2010],
            ID["EPSG",1197]
        ],
        ID["EPSG",8252]
    ],
    CONVERSION[
        "MTM zone 3",
        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",
            -58.5000000000003,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8802]
        ],
        PARAMETER[
            "Scale factor at natural origin",
            0.9999,
            SCALEUNIT["unity",1,ID["EPSG",9201]],
            ID["EPSG",8805]
        ],
        PARAMETER[
            "False easting",
            304800,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",17703]
    ],
    CS[Cartesian,2,ID["EPSG",4496]],
    AXIS["Easting (E(X))",east],
    AXIS["Northing (N(Y))",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",22643]
]

+proj=tmerc +lat_0=0 +lon_0=-58.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=GRS80 +units=m +no_defs +type=crs

proj4.defs("EPSG:22643", "+proj=tmerc +lat_0=0 +lon_0=-58.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=GRS80 +units=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 22643,
  "name": "NAD83(CSRS)v6 / MTM zone 3",
  "kind": "projected",
  "area": "Canada - Newfoundland and Labrador - 60°W to 57.5°W",
  "unit": "metre",
  "bbox": [
    47.5,
    -59.48,
    50.54,
    -57.5
  ],
  "proj4": "+proj=tmerc +lat_0=0 +lon_0=-58.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=GRS80 +units=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (22643, 'EPSG', 22643, '+proj=tmerc +lat_0=0 +lon_0=-58.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=GRS80 +units=m +no_defs +type=crs', 'PROJCS["NAD83(CSRS)v6 / MTM zone 3",GEOGCS["NAD83(CSRS)v6",DATUM["North_American_Datum_of_1983_CSRS_version_6",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1197"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","8252"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-58.5],PARAMETER["scale_factor",0.9999],PARAMETER["false_easting",304800],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","22643"]]');

PROJECTION
  "+proj=tmerc"
  "+lat_0=0"
  "+lon_0=-58.5"
  "+k=0.9999"
  "+x_0=304800"
  "+y_0=0"
  "+ellps=GRS80"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

22643=PROJCS["NAD83(CSRS)v6 / MTM zone 3",GEOGCS["NAD83(CSRS)v6",DATUM["North_American_Datum_of_1983_CSRS_version_6",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1197"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","8252"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-58.5],PARAMETER["scale_factor",0.9999],PARAMETER["false_easting",304800],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","22643"]]