EPSG:26718

NAD27 / UTM zone 18N

Selected transformation

Method: NTv2

Grid Files: QUE27-98.gsb

Remarks: Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD27 (code 4267) and NAD83(CSRS98) (code 4140) have longitudes positive east. Can be taken as an approximate transformation NAD27 to WGS 84 - see code 1692.

Information source: Geodetic Service of Quebec. Contact alain.bernard@mrn.gouv.qc.ca

Revision date: 2000-10-19

Center coordinates
929399.69 5981367.29

Projected bounds:
117653.98 4981667.27
1910715.65 7070687.95

WGS84 bounds:
-79.85 44.99
-57.1 62.62

Canada - Quebec.
MapTiler banner

Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        PROJCRS["NAD27 / UTM zone 18N",
            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 18N",
                METHOD["Transverse Mercator",
                    ID["EPSG",9807]],
                PARAMETER["Latitude of natural origin",0,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8801]],
                PARAMETER["Longitude of natural origin",-75,
                    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 78°W and 72°W. Bahamas. Canada - Nunavut; Ontario; Quebec. Cuba. United States (USA) - Connecticut; Delaware; Maryland; Massachusetts; New Hampshire; New Jersey; New York; North Carolina; Pennsylvania; Virginia; Vermont. Onshore for Canadian arctic. onshore and offshore for US east coast and Cuba, with usage in Bahamas onshore plus offshore over internal continental shelf only."],
                BBOX[18.83,-78,83.16,-72]],
            ID["EPSG",26718]]],
    TARGETCRS[
        GEOGCRS["NAD83(CSRS98)",
            DATUM["NAD83 Canadian Spatial Reference System",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree minute second hemisphere",0.0174532925199433]],
                AXIS["geodetic longitude (Long)",east,
                    ORDER[2],
                    ANGLEUNIT["degree minute second hemisphere",0.0174532925199433]],
            USAGE[
                SCOPE["Geodesy."],
                AREA["Canada - Alberta; New Brunswick; Saskatchewan; Prince Edward Island; and Quebec."],
                BBOX[44.61,-120,62.56,-57.1]],
            ID["EPSG",4140]]],
    ABRIDGEDTRANSFORMATION["NAD27 to NAD83(CSRS98) (1)",
        METHOD["NTv2",
            ID["EPSG",9615]],
        PARAMETERFILE["Latitude and longitude difference file","QUE27-98.gsb"],
        USAGE[
            SCOPE["Transformation of coordinates at 1m to 2m level of accuracy."],
            AREA["Canada - Quebec."],
            BBOX[44.99,-79.85,62.62,-57.1]],
        ID["EPSG",1574],
        REMARK["Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD27 (code 4267) and NAD83(CSRS98) (code 4140) have longitudes positive east. Can be taken as an approximate transformation NAD27 to WGS 84 - see code 1692."]]]

Definition: PROJ.4

+proj=utm +zone=18 +datum=NAD27 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:26718","+proj=utm +zone=18 +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 18N",
        "base_crs": {
            "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
            }
        },
        "conversion": {
            "name": "UTM zone 18N",
            "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": -75,
                    "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": 26718
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "NAD83(CSRS98)",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "NAD83 Canadian Spatial Reference System",
            "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": {
                        "type": "AngularUnit",
                        "name": "degree minute second hemisphere",
                        "conversion_factor": 0.0174532925199433
                    }
                },
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Long",
                    "direction": "east",
                    "unit": {
                        "type": "AngularUnit",
                        "name": "degree minute second hemisphere",
                        "conversion_factor": 0.0174532925199433
                    }
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 4140
        }
    },
    "transformation": {
        "name": "NAD27 to NAD83(CSRS98) (1)",
        "method": {
            "name": "NTv2",
            "id": {
                "authority": "EPSG",
                "code": 9615
            }
        },
        "parameters": [
            {
                "name": "Latitude and longitude difference file",
                "value": "QUE27-98.gsb",
                "id": {
                    "authority": "EPSG",
                    "code": 8656
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 1574
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=utm"
	"zone=18"
	"datum=NAD27"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=utm +zone=18 +datum=NAD27 +units=m +no_defs +type=crs">
	<Layer srs="+proj=utm +zone=18 +datum=NAD27 +units=m +no_defs +type=crs">
	</Layer>
</Map>