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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: 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.
&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
29434.34 180338.26
Projected bounds:
-675972.27 -700537.56
681478.25 1019912.74
WGS84 bounds:
165.87 -47.65
179.27 -33.89
Definition: OGC Well Known Text
PROJCS["NZGD49 / North Island Grid", 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",-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",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["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: 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": 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
27291=PROJCS["NZGD49 / North Island Grid",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",-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: 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=54.4,-20.1,183.1,0,0,0,0 +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=54.4,-20.1,183.1,0,0,0,0 +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=54.4,-20.1,183.1,0,0,0,0 +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[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",-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"]]');
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