EPSG:2027 — NAD27(76) / UTM zone 15N

PROJCRS[
    "NAD27(76) / UTM zone 15N",
    BASEGEOGCRS[
        "NAD27(76)",
        DATUM[
            "North American Datum 1927 (1976)",
            ELLIPSOID[
                "Clarke 1866",
                6378206.4,
                294.978698213898,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7008]
            ],
            ID["EPSG",6608]
        ],
        ID["EPSG",4608]
    ],
    CONVERSION[
        "UTM zone 15N",
        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",
            -93,
            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",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",16015]
    ],
    CS[Cartesian,2,ID["EPSG",4400]],
    AXIS["Easting (E)",east],
    AXIS["Northing (N)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",2027]
]

+proj=utm +zone=15 +ellps=clrk66 +nadgrids=May76v20.gsb +units=m +no_defs +type=crs

proj4.defs("EPSG:2027", "+proj=utm +zone=15 +ellps=clrk66 +nadgrids=May76v20.gsb +units=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 2027,
  "name": "NAD27(76) / UTM zone 15N",
  "kind": "projected",
  "area": "Canada - Ontario - west of 90°W",
  "unit": "metre",
  "bbox": [
    48.03,
    -95.16,
    56.2,
    -90
  ],
  "proj4": "+proj=utm +zone=15 +ellps=clrk66 +nadgrids=May76v20.gsb +units=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (2027, 'EPSG', 2027, '+proj=utm +zone=15 +ellps=clrk66 +nadgrids=May76v20.gsb +units=m +no_defs +type=crs', 'PROJCS["NAD27(76) / UTM zone 15N",GEOGCS["NAD27(76)",DATUM["North_American_Datum_1927_1976",SPHEROID["Clarke 1866",6378206.4,294.978698213898],EXTENSION["PROJ4_GRIDS","May76v20.gsb"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4608"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-93],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","2027"]]');

PROJECTION
  "+proj=utm"
  "+zone=15"
  "+ellps=clrk66"
  "+nadgrids=May76v20.gsb"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

2027=PROJCS["NAD27(76) / UTM zone 15N",GEOGCS["NAD27(76)",DATUM["North_American_Datum_1927_1976",SPHEROID["Clarke 1866",6378206.4,294.978698213898],EXTENSION["PROJ4_GRIDS","May76v20.gsb"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4608"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-93],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","2027"]]