EPSG:2012 — NAD27(CGQ77) / SCoPQ zone 6

Projected · Canada - Quebec - 69°W to 66°W

Export Formats

OGC WKT

PROJCS[
    "NAD27(CGQ77) / SCoPQ zone 6",
    GEOGCS[
        "NAD27(CGQ77)",
        DATUM[
            "North_American_Datum_1927_CGQ77",
            SPHEROID["Clarke 1866",6378206.4,294.978698213898],
            EXTENSION["PROJ4_GRIDS","CQ77NA83.GSB"]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4609"]
    ],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-67.5],
    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","2012"]
]

WKT2

PROJCRS[
    "NAD27(CGQ77) / SCoPQ zone 6",
    BASEGEOGCRS[
        "NAD27(CGQ77)",
        DATUM[
            "North American Datum 1927 (CGQ77)",
            ELLIPSOID[
                "Clarke 1866",
                6378206.4,
                294.978698213898,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7008]
            ],
            ID["EPSG",6609]
        ],
        ID["EPSG",4609]
    ],
    CONVERSION[
        "MTM zone 6",
        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",
            -67.5000000000003,
            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",17706]
    ],
    CS[Cartesian,2,ID["EPSG",4499]],
    AXIS["Easting (X)",east],
    AXIS["Northing (Y)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",2012]
]

PROJ.4

+proj=tmerc +lat_0=0 +lon_0=-67.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=clrk66 +nadgrids=CQ77NA83.GSB +units=m +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:2012", "+proj=tmerc +lat_0=0 +lon_0=-67.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=clrk66 +nadgrids=CQ77NA83.GSB +units=m +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 2012,
  "name": "NAD27(CGQ77) / SCoPQ zone 6",
  "kind": "projected",
  "area": "Canada - Quebec - 69°W to 66°W",
  "unit": "metre",
  "bbox": [
    47.31,
    -69,
    59,
    -66
  ],
  "proj4": "+proj=tmerc +lat_0=0 +lon_0=-67.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=clrk66 +nadgrids=CQ77NA83.GSB +units=m +no_defs +type=crs"
}

PostGIS

How to add a projection to PostGIS? →

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (2012, 'EPSG', 2012, '+proj=tmerc +lat_0=0 +lon_0=-67.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=clrk66 +nadgrids=CQ77NA83.GSB +units=m +no_defs +type=crs', 'PROJCS["NAD27(CGQ77) / SCoPQ zone 6",GEOGCS["NAD27(CGQ77)",DATUM["North_American_Datum_1927_CGQ77",SPHEROID["Clarke 1866",6378206.4,294.978698213898],EXTENSION["PROJ4_GRIDS","CQ77NA83.GSB"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4609"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-67.5],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","2012"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=tmerc"
  "+lat_0=0"
  "+lon_0=-67.5"
  "+k=0.9999"
  "+x_0=304800"
  "+y_0=0"
  "+ellps=clrk66"
  "+nadgrids=CQ77NA83.GSB"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

2012=PROJCS["NAD27(CGQ77) / SCoPQ zone 6",GEOGCS["NAD27(CGQ77)",DATUM["North_American_Datum_1927_CGQ77",SPHEROID["Clarke 1866",6378206.4,294.978698213898],EXTENSION["PROJ4_GRIDS","CQ77NA83.GSB"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4609"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-67.5],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","2012"]]

Related Coordinate Systems

Available Transformations (8)

Transformations inherited from base CRS: EPSG:4609 (NAD27(CGQ77))

Transformation	Source → Target	Accuracy (m)
NAD27(CGQ77) to NAD83 (1)	4609 → 4269	1
NAD27(CGQ77) to NAD83 (2)	4609 → 4269	1.5
NAD27(CGQ77) to WGS 84 (3)	4609 → 4326	1.5
NAD27(CGQ77) to NAD83(CSRS)v2 (1)	4609 → 8237	1.5
NAD27(CGQ77) to NAD83(CSRS98) (1) Deprecated	4609 → 4140	—
NAD27(CGQ77) to NAD83(CSRS) (1) Deprecated	4609 → 4617	1.5
NAD27(CGQ77) to WGS 84 (1) Deprecated	4609 → 4326	—
NAD27(CGQ77) to WGS 84 (2) Deprecated	4609 → 4326	—

Other CRS using North American Datum 1927 (CGQ77) (14)

Frequently Asked Questions

How do I add EPSG:2012 to GeoServer?

Add the following definition to your GeoServer configuration:

2012=PROJCS["NAD27(CGQ77) / SCoPQ zone 6",GEOGCS["NAD27(CGQ77)",DATUM["North_American_Datum_1927_CGQ77",SPHEROID["Clarke 1866",6378206.4,294.978698213898],EXTENSION["PROJ4_GRIDS","CQ77NA83.GSB"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4609"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-67.5],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","2012"]]

Read the full GeoServer guide →

How do I add EPSG:2012 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (2012, 'EPSG', 2012, '+proj=tmerc +lat_0=0 +lon_0=-67.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=clrk66 +nadgrids=CQ77NA83.GSB +units=m +no_defs +type=crs', 'PROJCS["NAD27(CGQ77) / SCoPQ zone 6",GEOGCS["NAD27(CGQ77)",DATUM["North_American_Datum_1927_CGQ77",SPHEROID["Clarke 1866",6378206.4,294.978698213898],EXTENSION["PROJ4_GRIDS","CQ77NA83.GSB"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4609"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-67.5],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","2012"]]');

Read the full PostGIS guide →

How do I add EPSG:2012 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=tmerc"
  "+lat_0=0"
  "+lon_0=-67.5"
  "+k=0.9999"
  "+x_0=304800"
  "+y_0=0"
  "+ellps=clrk66"
  "+nadgrids=CQ77NA83.GSB"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:2012 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:2012", "+proj=tmerc +lat_0=0 +lon_0=-67.5 +k=0.9999 +x_0=304800 +y_0=0 +ellps=clrk66 +nadgrids=CQ77NA83.GSB +units=m +no_defs +type=crs");

Read the full Proj4js guide →