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Method: Geocentric translations (geog2D domain)
Remarks: These parameter values are taken from NZGD49 to NZGD2000 (1) (code 1566) and assume that NZGD2000 and WGS 84 are coincident to within the accuracy of the tfm. For better accuracy use NZGD49 to WGS 84 (2) (code 1564) or NZGD49 to WGS 84 (3) (code 1670).
Information source: Land Information New Zealand: LINZS25000 Standard for New Zealand Geodetic Datum 2000; 16 November 2007.
Revision date: 2021-09-23
Unit: metre
Geodetic CRS: NZGD49
Datum: New Zealand Geodetic Datum 1949
Ellipsoid: International 1924
Prime meridian: Greenwich
Data source: EPSG
Information source: Land Information New Zealand OSG Technical Report 8; 16 April 1999.
Revision date: 2011-01-25
Scope: Cadastre.
Remarks: Replaced Imperial measure version in 1972. Replaced by NZGD2000 / Grey 2000 (code 2118) from March 2000.
Area of use: New Zealand - South Island - Grey meridional circuit area.
Coordinate system: Cartesian 2D CS. Axes: northing, easting (N,E). Orientations: north, east. UoM: m.
&stroke=red&width=2&path=-47.65,165.87|-33.89,165.87|-33.89,179.27|-47.65,179.27|-47.65,165.87)
Center coordinates
386124.28 872983.44
Projected bounds:
-225745.31 80043.19
1014967.25 1637045.33
WGS84 bounds:
165.87 -47.65
179.27 -33.89
Definition: OGC Well Known Text
PROJCS["NZGD49 / Grey Circuit", GEOGCS["NZGD49", DATUM["New_Zealand_Geodetic_Datum_1949", SPHEROID["International 1924",6378388,297], TOWGS84[54.4,-20.1,183.1,0,0,0,0]], PRIMEM["Greenwich",0, AUTHORITY["EPSG","8901"]], UNIT["degree",0.0174532925199433, AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","4272"]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",-42.3336942777778], PARAMETER["central_meridian",171.549771305556], PARAMETER["scale_factor",1], PARAMETER["false_easting",300000], PARAMETER["false_northing",700000], UNIT["metre",1, AUTHORITY["EPSG","9001"]], AUTHORITY["EPSG","27218"]]
Definition: OGC Well Known Text 2 (2019)
BOUNDCRS[ SOURCECRS[ PROJCRS["NZGD49 / Grey Circuit", 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["Grey Circuit", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",-42.3336942777778, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",171.549771305556, 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["metre",1], ID["EPSG",8806]], PARAMETER["False northing",700000, LENGTHUNIT["metre",1], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["northing (N)",north, ORDER[1], LENGTHUNIT["metre",1]], AXIS["easting (E)",east, ORDER[2], LENGTHUNIT["metre",1]], USAGE[ SCOPE["Cadastre."], AREA["New Zealand - South Island - Grey meridional circuit area."], BBOX[-42.74,171.15,-41.5,172.75]], ID["EPSG",27218]]], 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",54.4, ID["EPSG",8605]], PARAMETER["Y-axis translation",-20.1, ID["EPSG",8606]], PARAMETER["Z-axis translation",183.1, ID["EPSG",8607]], PARAMETER["X-axis rotation",0, ID["EPSG",8608]], PARAMETER["Y-axis rotation",0, ID["EPSG",8609]], PARAMETER["Z-axis rotation",0, ID["EPSG",8610]], PARAMETER["Scale difference",1, ID["EPSG",8611]]]]
Definition: ESRI Well Known Text
PROJCS["NZGD_1949_Grey_Circuit", 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",700000.0], PARAMETER["Central_Meridian",171.549771305556], PARAMETER["Scale_Factor",1.0], PARAMETER["Latitude_Of_Origin",-42.3336942777778], UNIT["Meter",1.0]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "BoundCRS", "source_crs": { "type": "ProjectedCRS", "name": "NZGD49 / Grey Circuit", "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": "Grey Circuit", "method": { "name": "Transverse Mercator", "id": { "authority": "EPSG", "code": 9807 } }, "parameters": [ { "name": "Latitude of natural origin", "value": -42.3336942777778, "unit": "degree", "id": { "authority": "EPSG", "code": 8801 } }, { "name": "Longitude of natural origin", "value": 171.549771305556, "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": "metre", "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 700000, "unit": "metre", "id": { "authority": "EPSG", "code": 8807 } } ] }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Northing", "abbreviation": "N", "direction": "north", "unit": "metre" }, { "name": "Easting", "abbreviation": "E", "direction": "east", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 27218 } }, "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": 54.4, "unit": "metre", "id": { "authority": "EPSG", "code": 8605 } }, { "name": "Y-axis translation", "value": -20.1, "unit": "metre", "id": { "authority": "EPSG", "code": 8606 } }, { "name": "Z-axis translation", "value": 183.1, "unit": "metre", "id": { "authority": "EPSG", "code": 8607 } }, { "name": "X-axis rotation", "value": 0, "unit": { "type": "AngularUnit", "name": "arc-second", "conversion_factor": 4.84813681109536e-06 }, "id": { "authority": "EPSG", "code": 8608 } }, { "name": "Y-axis rotation", "value": 0, "unit": { "type": "AngularUnit", "name": "arc-second", "conversion_factor": 4.84813681109536e-06 }, "id": { "authority": "EPSG", "code": 8609 } }, { "name": "Z-axis rotation", "value": 0, "unit": { "type": "AngularUnit", "name": "arc-second", "conversion_factor": 4.84813681109536e-06 }, "id": { "authority": "EPSG", "code": 8610 } }, { "name": "Scale difference", "value": 0, "unit": { "type": "ScaleUnit", "name": "parts per million", "conversion_factor": 1e-06 }, "id": { "authority": "EPSG", "code": 8611 } } ] } }
Definition: GeoServer
27218=PROJCS["NZGD49 / Grey Circuit",GEOGCS["NZGD49",DATUM["New_Zealand_Geodetic_Datum_1949",SPHEROID["International 1924",6378388,297],TOWGS84[54.4,-20.1,183.1,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4272"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-42.3336942777778],PARAMETER["central_meridian",171.549771305556],PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],PARAMETER["false_northing",700000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","27218"]]
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=tmerc +lat_0=-42.3336942777778 +lon_0=171.549771305556 +k=1 +x_0=300000 +y_0=700000 +ellps=intl +towgs84=54.4,-20.1,183.1,0,0,0,0 +units=m +no_defs +type=crs"> <Layer srs="+proj=tmerc +lat_0=-42.3336942777778 +lon_0=171.549771305556 +k=1 +x_0=300000 +y_0=700000 +ellps=intl +towgs84=54.4,-20.1,183.1,0,0,0,0 +units=m +no_defs +type=crs"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 27218, 'EPSG', 27218, '+proj=tmerc +lat_0=-42.3336942777778 +lon_0=171.549771305556 +k=1 +x_0=300000 +y_0=700000 +ellps=intl +towgs84=54.4,-20.1,183.1,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["NZGD49 / Grey Circuit",GEOGCS["NZGD49",DATUM["New_Zealand_Geodetic_Datum_1949",SPHEROID["International 1924",6378388,297],TOWGS84[54.4,-20.1,183.1,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4272"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-42.3336942777778],PARAMETER["central_meridian",171.549771305556],PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],PARAMETER["false_northing",700000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","27218"]]');
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