EPSG:27291

NZGD49 / North Island Grid

Transform Get position on a map

Available transformations
to EPSG:4326
EPSG:4326 - WGS 84

Selected transformation

Method: Coordinate Frame rotation (geog2D domain)

Remarks: These parameter values are taken from NZGD49 to NZGD2000 (2) (code 1701) and assume that NZGD2000 and WGS 84 are coincident to within the accuracy of the transformation. For improved accuracy use NZGD49 to WGS 84 (4) (code 1670).

Information source: Land Information New Zealand: LINZS25000 Standard for New Zealand Geodetic Datum 2000; 16 November 2007.

Revision date: 2021-09-23

Attributes

Unit: British yard (Sears 1922)

Geodetic CRS: NZGD49

Datum: New Zealand Geodetic Datum 1949

Ellipsoid: International 1924

Prime meridian: Greenwich

Data source: EPSG

Revision date: 2000-10-19

Scope: Engineering survey, topographic mapping.

Remarks: Sears 1922 British foot-metre conversion factor applied to ellipsoid. Replaced by 27200 (GD49 / New Zealand Map Grid) in 1972.

Area of use: New Zealand - North Island.

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

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Center coordinates
29467.23 180336.77

Projected bounds:
-675934.74 -700535.44
681514.61 1019909.08

WGS84 bounds:
165.87 -47.65
179.27 -33.89

New Zealand - North Island, South Island, Stewart Island - onshore and nearshore.
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Definition: OGC Well Known Text

PROJCS["NZGD49 / North Island Grid",
    GEOGCS["NZGD49",
        DATUM["New_Zealand_Geodetic_Datum_1949",
            SPHEROID["International 1924",6378388,297],
            TOWGS84[59.47,-5.04,187.44,-0.47,0.1,-1.024,-4.5993]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4272"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",-39],
    PARAMETER["central_meridian",175.5],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",300000],
    PARAMETER["false_northing",400000],
    UNIT["British yard (Sears 1922)",0.914398414616029],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","27291"]]

Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        PROJCRS["NZGD49 / North Island Grid",
            BASEGEOGCRS["NZGD49",
                DATUM["New Zealand Geodetic Datum 1949",
                    ELLIPSOID["International 1924",6378388,297,
                        LENGTHUNIT["metre",1]]],
                PRIMEM["Greenwich",0,
                    ANGLEUNIT["degree",0.0174532925199433]],
                ID["EPSG",4272]],
            CONVERSION["New Zealand North Island National Grid",
                METHOD["Transverse Mercator",
                    ID["EPSG",9807]],
                PARAMETER["Latitude of natural origin",-39,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8801]],
                PARAMETER["Longitude of natural origin",175.5,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8802]],
                PARAMETER["Scale factor at natural origin",1,
                    SCALEUNIT["unity",1],
                    ID["EPSG",8805]],
                PARAMETER["False easting",300000,
                    LENGTHUNIT["British yard (Sears 1922)",0.914398414616029],
                    ID["EPSG",8806]],
                PARAMETER["False northing",400000,
                    LENGTHUNIT["British yard (Sears 1922)",0.914398414616029],
                    ID["EPSG",8807]]],
            CS[Cartesian,2],
                AXIS["(E)",east,
                    ORDER[1],
                    LENGTHUNIT["British yard (Sears 1922)",0.914398414616029]],
                AXIS["(N)",north,
                    ORDER[2],
                    LENGTHUNIT["British yard (Sears 1922)",0.914398414616029]],
            USAGE[
                SCOPE["Engineering survey, topographic mapping."],
                AREA["New Zealand - North Island."],
                BBOX[-41.67,171.99,-34.1,178.63]],
            ID["EPSG",27291]]],
    TARGETCRS[
        GEOGCRS["WGS 84",
            ENSEMBLE["World Geodetic System 1984 ensemble",
                MEMBER["World Geodetic System 1984 (Transit)"],
                MEMBER["World Geodetic System 1984 (G730)"],
                MEMBER["World Geodetic System 1984 (G873)"],
                MEMBER["World Geodetic System 1984 (G1150)"],
                MEMBER["World Geodetic System 1984 (G1674)"],
                MEMBER["World Geodetic System 1984 (G1762)"],
                MEMBER["World Geodetic System 1984 (G2139)"],
                ELLIPSOID["WGS 84",6378137,298.257223563,
                    LENGTHUNIT["metre",1]],
                ENSEMBLEACCURACY[2.0]],
            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["World."],
                BBOX[-90,-180,90,180]],
            ID["EPSG",4326]]],
    ABRIDGEDTRANSFORMATION["Transformation from unknown to WGS84",
        METHOD["Position Vector transformation (geog2D domain)",
            ID["EPSG",9606]],
        PARAMETER["X-axis translation",59.47,
            ID["EPSG",8605]],
        PARAMETER["Y-axis translation",-5.04,
            ID["EPSG",8606]],
        PARAMETER["Z-axis translation",187.44,
            ID["EPSG",8607]],
        PARAMETER["X-axis rotation",-0.47,
            ID["EPSG",8608]],
        PARAMETER["Y-axis rotation",0.1,
            ID["EPSG",8609]],
        PARAMETER["Z-axis rotation",-1.024,
            ID["EPSG",8610]],
        PARAMETER["Scale difference",0.9999954007,
            ID["EPSG",8611]]]]

Definition: ESRI Well Known Text

PROJCS["New_Zealand_North_Island",
    GEOGCS["GCS_New_Zealand_1949",
        DATUM["D_New_Zealand_1949",
            SPHEROID["International_1924",6378388.0,297.0]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",300000.0],
    PARAMETER["False_Northing",400000.0],
    PARAMETER["Central_Meridian",175.5],
    PARAMETER["Scale_Factor",1.0],
    PARAMETER["Latitude_Of_Origin",-39.0],
    UNIT["British yard (Sears 1922)",0.914398414616029]]

Definition: PROJ.4

+proj=tmerc +lat_0=-39 +lon_0=175.5 +k=1 +x_0=274319.524384809 +y_0=365759.365846412 +ellps=intl +towgs84=59.47,-5.04,187.44,-0.47,0.1,-1.024,-4.5993 +to_meter=0.914398414616029 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:27291","+proj=tmerc +lat_0=-39 +lon_0=175.5 +k=1 +x_0=274319.524384809 +y_0=365759.365846412 +ellps=intl +towgs84=59.47,-5.04,187.44,-0.47,0.1,-1.024,-4.5993 +to_meter=0.914398414616029 +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "ProjectedCRS",
        "name": "NZGD49 / North Island Grid",
        "base_crs": {
            "name": "NZGD49",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "New Zealand Geodetic Datum 1949",
                "ellipsoid": {
                    "name": "International 1924",
                    "semi_major_axis": 6378388,
                    "inverse_flattening": 297
                }
            },
            "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": 4272
            }
        },
        "conversion": {
            "name": "New Zealand North Island National Grid",
            "method": {
                "name": "Transverse Mercator",
                "id": {
                    "authority": "EPSG",
                    "code": 9807
                }
            },
            "parameters": [
                {
                    "name": "Latitude of natural origin",
                    "value": -39,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8801
                    }
                },
                {
                    "name": "Longitude of natural origin",
                    "value": 175.5,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8802
                    }
                },
                {
                    "name": "Scale factor at natural origin",
                    "value": 1,
                    "unit": "unity",
                    "id": {
                        "authority": "EPSG",
                        "code": 8805
                    }
                },
                {
                    "name": "False easting",
                    "value": 300000,
                    "unit": {
                        "type": "LinearUnit",
                        "name": "British yard (Sears 1922)",
                        "conversion_factor": 0.914398414616029
                    },
                    "id": {
                        "authority": "EPSG",
                        "code": 8806
                    }
                },
                {
                    "name": "False northing",
                    "value": 400000,
                    "unit": {
                        "type": "LinearUnit",
                        "name": "British yard (Sears 1922)",
                        "conversion_factor": 0.914398414616029
                    },
                    "id": {
                        "authority": "EPSG",
                        "code": 8807
                    }
                }
            ]
        },
        "coordinate_system": {
            "subtype": "Cartesian",
            "axis": [
                {
                    "name": "Easting",
                    "abbreviation": "E",
                    "direction": "east",
                    "unit": {
                        "type": "LinearUnit",
                        "name": "British yard (Sears 1922)",
                        "conversion_factor": 0.914398414616029
                    }
                },
                {
                    "name": "Northing",
                    "abbreviation": "N",
                    "direction": "north",
                    "unit": {
                        "type": "LinearUnit",
                        "name": "British yard (Sears 1922)",
                        "conversion_factor": 0.914398414616029
                    }
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 27291
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "WGS 84",
        "datum_ensemble": {
            "name": "World Geodetic System 1984 ensemble",
            "members": [
                {
                    "name": "World Geodetic System 1984 (Transit)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1166
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G730)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1152
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G873)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1153
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1150)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1154
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1674)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1155
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1762)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1156
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G2139)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1309
                    }
                }
            ],
            "ellipsoid": {
                "name": "WGS 84",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257223563
            },
            "accuracy": "2.0",
            "id": {
                "authority": "EPSG",
                "code": 6326
            }
        },
        "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": 4326
        }
    },
    "transformation": {
        "name": "Transformation from unknown to WGS84",
        "method": {
            "name": "Position Vector transformation (geog2D domain)",
            "id": {
                "authority": "EPSG",
                "code": 9606
            }
        },
        "parameters": [
            {
                "name": "X-axis translation",
                "value": 59.47,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8605
                }
            },
            {
                "name": "Y-axis translation",
                "value": -5.04,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8606
                }
            },
            {
                "name": "Z-axis translation",
                "value": 187.44,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8607
                }
            },
            {
                "name": "X-axis rotation",
                "value": -0.47,
                "unit": {
                    "type": "AngularUnit",
                    "name": "arc-second",
                    "conversion_factor": 4.84813681109536e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8608
                }
            },
            {
                "name": "Y-axis rotation",
                "value": 0.1,
                "unit": {
                    "type": "AngularUnit",
                    "name": "arc-second",
                    "conversion_factor": 4.84813681109536e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8609
                }
            },
            {
                "name": "Z-axis rotation",
                "value": -1.024,
                "unit": {
                    "type": "AngularUnit",
                    "name": "arc-second",
                    "conversion_factor": 4.84813681109536e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8610
                }
            },
            {
                "name": "Scale difference",
                "value": -4.5993,
                "unit": {
                    "type": "ScaleUnit",
                    "name": "parts per million",
                    "conversion_factor": 1e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8611
                }
            }
        ]
    }
}

Definition: GeoServer

27291=PROJCS["NZGD49 / North Island Grid",GEOGCS["NZGD49",DATUM["New_Zealand_Geodetic_Datum_1949",SPHEROID["International 1924",6378388,297],TOWGS84[59.47,-5.04,187.44,-0.47,0.1,-1.024,-4.5993]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4272"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-39],PARAMETER["central_meridian",175.5],PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],PARAMETER["false_northing",400000],UNIT["British yard (Sears 1922)",0.914398414616029],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","27291"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=-39"
	"lon_0=175.5"
	"k=1"
	"x_0=274319.524384809"
	"y_0=365759.365846412"
	"ellps=intl"
	"towgs84=59.47,-5.04,187.44,-0.47,0.1,-1.024,-4.5993"
	"to_meter=0.914398414616029"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=-39 +lon_0=175.5 +k=1 +x_0=274319.524384809 +y_0=365759.365846412 +ellps=intl +towgs84=59.47,-5.04,187.44,-0.47,0.1,-1.024,-4.5993 +to_meter=0.914398414616029 +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=-39 +lon_0=175.5 +k=1 +x_0=274319.524384809 +y_0=365759.365846412 +ellps=intl +towgs84=59.47,-5.04,187.44,-0.47,0.1,-1.024,-4.5993 +to_meter=0.914398414616029 +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 27291, 'EPSG', 27291, '+proj=tmerc +lat_0=-39 +lon_0=175.5 +k=1 +x_0=274319.524384809 +y_0=365759.365846412 +ellps=intl +towgs84=59.47,-5.04,187.44,-0.47,0.1,-1.024,-4.5993 +to_meter=0.914398414616029 +no_defs +type=crs', 'PROJCS["NZGD49 / North Island Grid",GEOGCS["NZGD49",DATUM["New_Zealand_Geodetic_Datum_1949",SPHEROID["International 1924",6378388,297],TOWGS84[59.47,-5.04,187.44,-0.47,0.1,-1.024,-4.5993]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4272"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-39],PARAMETER["central_meridian",175.5],PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],PARAMETER["false_northing",400000],UNIT["British yard (Sears 1922)",0.914398414616029],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","27291"]]');