EPSG:26712

NAD27 / UTM zone 12N

Available transformations
to EPSG:8240
EPSG:8240 - NAD83(CSRS)v3

Selected transformation

Name: NAD27 to NAD83(CSRS)v3 (9)

Method: NTv2

Grid Files: NVI27_05.GSB

Remarks: Derived through NAD83(CSRS)v3.

Information source: GeoBC, Government of British Columbia, via ISO Geodetic Register.

Revision date: 2019-07-15

Attributes

Unit: metre

Geodetic CRS: NAD27

Datum: North American Datum 1927

Ellipsoid: Clarke 1866

Prime meridian: Greenwich

Data source: EPSG

Revision date: 2022-12-12

Scope: Engineering survey, topographic mapping.

Remarks: In Mexico, replaced by Mexican Datum of 1993 / UTM zone 12N (code 4485). In Canada and USA, replaced by NAD83 / UTM zone 12N (code 26912).

Area of use: North America - between 114°W and 108°W. Canada - Alberta; Northwest Territories; Nunavut; Saskatchewan. Mexico. United States (USA) - Arizona; Colorado; Idaho; Montana; New Mexico; Utah; Wyoming. Onshore for Mexican Pacific and Canadian Arctic coasts.

Coordinate system: Cartesian 2D CS. Axes: easting, northing (E,N). Orientations: east, north. UoM: m.

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Center coordinates
-578994.53 5614461.52

Projected bounds:
-790472.45 5445256.66
-376187.65 5789198.28

WGS84 bounds:
-128.5 48.48
-123.49 50.93

Canada - British Columbia - north Vancouver Island.
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Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        PROJCRS["NAD27 / UTM zone 12N",
            BASEGEOGCRS["NAD27",
                DATUM["North American Datum 1927",
                    ELLIPSOID["Clarke 1866",6378206.4,294.978698213898,
                        LENGTHUNIT["metre",1]]],
                PRIMEM["Greenwich",0,
                    ANGLEUNIT["degree",0.0174532925199433]],
                ID["EPSG",4267]],
            CONVERSION["UTM zone 12N",
                METHOD["Transverse Mercator",
                    ID["EPSG",9807]],
                PARAMETER["Latitude of natural origin",0,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8801]],
                PARAMETER["Longitude of natural origin",-111,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8802]],
                PARAMETER["Scale factor at natural origin",0.9996,
                    SCALEUNIT["unity",1],
                    ID["EPSG",8805]],
                PARAMETER["False easting",500000,
                    LENGTHUNIT["metre",1],
                    ID["EPSG",8806]],
                PARAMETER["False northing",0,
                    LENGTHUNIT["metre",1],
                    ID["EPSG",8807]]],
            CS[Cartesian,2],
                AXIS["(E)",east,
                    ORDER[1],
                    LENGTHUNIT["metre",1]],
                AXIS["(N)",north,
                    ORDER[2],
                    LENGTHUNIT["metre",1]],
            USAGE[
                SCOPE["Engineering survey, topographic mapping."],
                AREA["North America - between 114°W and 108°W. Canada - Alberta; Northwest Territories; Nunavut; Saskatchewan. Mexico. United States (USA) - Arizona; Colorado; Idaho; Montana; New Mexico; Utah; Wyoming. Onshore for Mexican Pacific and Canadian Arctic coasts."],
                BBOX[18.66,-114,78.81,-108]],
            ID["EPSG",26712]]],
    TARGETCRS[
        GEOGCRS["NAD83(CSRS)v3",
            DATUM["North American Datum of 1983 (CSRS) version 3",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]],
                ANCHOREPOCH[1997]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            USAGE[
                SCOPE["Horizontal component of 3D system."],
                AREA["Canada - onshore and offshore - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon."],
                BBOX[38.21,-141.01,86.46,-40.73]],
            ID["EPSG",8240],
            REMARK["Adopted by the Canadian federal government from 1999-01-01 and by the provincial governments of Alberta, British Columbia, Manitoba, Newfoundland and Labrador, Nova Scotia, Ontario and Saskatchewan. Replaces NAD83(CSRS)v2. Replaced by NAD83(CSRS)v4."]]],
    ABRIDGEDTRANSFORMATION["NAD27 to NAD83(CSRS)v3 (9)",
        METHOD["NTv2",
            ID["EPSG",9615]],
        PARAMETERFILE["Latitude and longitude difference file","NVI27_05.GSB"],
        USAGE[
            SCOPE["Geodesy."],
            AREA["Canada - British Columbia - north Vancouver Island."],
            BBOX[48.48,-128.5,50.93,-123.49]],
        ID["EPSG",9114],
        REMARK["Derived through NAD83(CSRS)v3."]]]

Definition: PROJ.4

+proj=utm +zone=12 +datum=NAD27 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:26712","+proj=utm +zone=12 +datum=NAD27 +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "ProjectedCRS",
        "name": "NAD27 / UTM zone 12N",
        "base_crs": {
            "type": "GeographicCRS",
            "name": "NAD27",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "North American Datum 1927",
                "ellipsoid": {
                    "name": "Clarke 1866",
                    "semi_major_axis": 6378206.4,
                    "semi_minor_axis": 6356583.8
                }
            },
            "coordinate_system": {
                "subtype": "ellipsoidal",
                "axis": [
                    {
                        "name": "Geodetic latitude",
                        "abbreviation": "Lat",
                        "direction": "north",
                        "unit": "degree"
                    },
                    {
                        "name": "Geodetic longitude",
                        "abbreviation": "Lon",
                        "direction": "east",
                        "unit": "degree"
                    }
                ]
            },
            "id": {
                "authority": "EPSG",
                "code": 4267
            },
            "remarks": "Note: this CRS includes longitudes which are POSITIVE EAST. Replaced by NAD27(76) (code 4608) in Ontario, CGQ77 (code 4609) in Quebec, Mexican Datum of 1993 (code 4483) in Mexico, NAD83 (code 4269) in Canada (excl. Ontario & Quebec) & USA."
        },
        "conversion": {
            "name": "UTM zone 12N",
            "method": {
                "name": "Transverse Mercator",
                "id": {
                    "authority": "EPSG",
                    "code": 9807
                }
            },
            "parameters": [
                {
                    "name": "Latitude of natural origin",
                    "value": 0,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8801
                    }
                },
                {
                    "name": "Longitude of natural origin",
                    "value": -111,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8802
                    }
                },
                {
                    "name": "Scale factor at natural origin",
                    "value": 0.9996,
                    "unit": "unity",
                    "id": {
                        "authority": "EPSG",
                        "code": 8805
                    }
                },
                {
                    "name": "False easting",
                    "value": 500000,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8806
                    }
                },
                {
                    "name": "False northing",
                    "value": 0,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8807
                    }
                }
            ]
        },
        "coordinate_system": {
            "subtype": "Cartesian",
            "axis": [
                {
                    "name": "Easting",
                    "abbreviation": "E",
                    "direction": "east",
                    "unit": "metre"
                },
                {
                    "name": "Northing",
                    "abbreviation": "N",
                    "direction": "north",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 26712
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "NAD83(CSRS)v3",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "North American Datum of 1983 (CSRS) version 3",
            "anchor_epoch": 1997,
            "ellipsoid": {
                "name": "GRS 1980",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257222101
            }
        },
        "coordinate_system": {
            "subtype": "ellipsoidal",
            "axis": [
                {
                    "name": "Geodetic latitude",
                    "abbreviation": "Lat",
                    "direction": "north",
                    "unit": "degree"
                },
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Lon",
                    "direction": "east",
                    "unit": "degree"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 8240
        },
        "remarks": "Adopted by the Canadian federal government from 1999-01-01 and by the provincial governments of Alberta, British Columbia, Manitoba, Newfoundland and Labrador, Nova Scotia, Ontario and Saskatchewan. Replaces NAD83(CSRS)v2. Replaced by NAD83(CSRS)v4."
    },
    "transformation": {
        "name": "NAD27 to NAD83(CSRS)v3 (9)",
        "method": {
            "name": "NTv2",
            "id": {
                "authority": "EPSG",
                "code": 9615
            }
        },
        "parameters": [
            {
                "name": "Latitude and longitude difference file",
                "value": "NVI27_05.GSB",
                "id": {
                    "authority": "EPSG",
                    "code": 8656
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 9114
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=utm"
	"zone=12"
	"datum=NAD27"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=utm +zone=12 +datum=NAD27 +units=m +no_defs +type=crs">
	<Layer srs="+proj=utm +zone=12 +datum=NAD27 +units=m +no_defs +type=crs">
	</Layer>
</Map>