EPSG:27230 — NZGD49 / Observation Point Circuit

Projected · New Zealand - South Island - Observation Point mc

Export Formats

OGC WKT

PROJCS[
    "NZGD49 / Observation Point Circuit",
    GEOGCS[
        "NZGD49",
        DATUM[
            "New_Zealand_Geodetic_Datum_1949",
            SPHEROID["International 1924",6378388,297],
            EXTENSION["PROJ4_GRIDS","nzgd2kgrid0005.gsb"]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4272"]
    ],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",-45.8161966111111],
    PARAMETER["central_meridian",170.628595166667],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",300000],
    PARAMETER["false_northing",700000],
    UNIT["metre",1,AUTHORITY["EPSG","9001"]],
    AUTHORITY["EPSG","27230"]
]

WKT2

PROJCRS[
    "NZGD49 / Observation Point Circuit",
    BASEGEOGCRS[
        "NZGD49",
        DATUM[
            "New Zealand Geodetic Datum 1949",
            ELLIPSOID[
                "International 1924",
                6378388,
                297,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7022]
            ],
            ID["EPSG",6272]
        ],
        ID["EPSG",4272]
    ],
    CONVERSION[
        "Observation Point Circuit",
        METHOD["Transverse Mercator",ID["EPSG",9807]],
        PARAMETER[
            "Latitude of natural origin",
            -45.8161966111114,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8801]
        ],
        PARAMETER[
            "Longitude of natural origin",
            170.628595166667,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8802]
        ],
        PARAMETER[
            "Scale factor at natural origin",
            1,
            SCALEUNIT["unity",1,ID["EPSG",9201]],
            ID["EPSG",8805]
        ],
        PARAMETER[
            "False easting",
            300000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            700000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",17926]
    ],
    CS[Cartesian,2,ID["EPSG",4500]],
    AXIS["Northing (N)",north],
    AXIS["Easting (E)",east],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",27230]
]

PROJ.4

+proj=tmerc +lat_0=-45.8161966111111 +lon_0=170.628595166667 +k=1 +x_0=300000 +y_0=700000 +ellps=intl +nadgrids=nzgd2kgrid0005.gsb +units=m +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:27230", "+proj=tmerc +lat_0=-45.8161966111111 +lon_0=170.628595166667 +k=1 +x_0=300000 +y_0=700000 +ellps=intl +nadgrids=nzgd2kgrid0005.gsb +units=m +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 27230,
  "name": "NZGD49 / Observation Point Circuit",
  "kind": "projected",
  "area": "New Zealand - South Island - Observation Point mc",
  "unit": "metre",
  "bbox": [
    -45.82,
    169.77,
    -44.61,
    171.24
  ],
  "proj4": "+proj=tmerc +lat_0=-45.8161966111111 +lon_0=170.628595166667 +k=1 +x_0=300000 +y_0=700000 +ellps=intl +nadgrids=nzgd2kgrid0005.gsb +units=m +no_defs +type=crs"
}

PostGIS

How to add a projection to PostGIS? →

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (27230, 'EPSG', 27230, '+proj=tmerc +lat_0=-45.8161966111111 +lon_0=170.628595166667 +k=1 +x_0=300000 +y_0=700000 +ellps=intl +nadgrids=nzgd2kgrid0005.gsb +units=m +no_defs +type=crs', 'PROJCS["NZGD49 / Observation Point Circuit",GEOGCS["NZGD49",DATUM["New_Zealand_Geodetic_Datum_1949",SPHEROID["International 1924",6378388,297],EXTENSION["PROJ4_GRIDS","nzgd2kgrid0005.gsb"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4272"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-45.8161966111111],PARAMETER["central_meridian",170.628595166667],PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],PARAMETER["false_northing",700000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","27230"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=tmerc"
  "+lat_0=-45.8161966111111"
  "+lon_0=170.628595166667"
  "+k=1"
  "+x_0=300000"
  "+y_0=700000"
  "+ellps=intl"
  "+nadgrids=nzgd2kgrid0005.gsb"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

27230=PROJCS["NZGD49 / Observation Point Circuit",GEOGCS["NZGD49",DATUM["New_Zealand_Geodetic_Datum_1949",SPHEROID["International 1924",6378388,297],EXTENSION["PROJ4_GRIDS","nzgd2kgrid0005.gsb"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4272"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-45.8161966111111],PARAMETER["central_meridian",170.628595166667],PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],PARAMETER["false_northing",700000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","27230"]]

Related Coordinate Systems

Available Transformations (9)

Transformations inherited from base CRS: EPSG:4272 (NZGD49)

Transformation	Source → Target	Accuracy (m)
NZGD49 to NZGD2000 (3)	4272 → 4167	0.2
NZGD49 to WGS 84 (3)	4272 → 4326	1
NZGD49 to WGS 84 (2)	4272 → 4326	4
NZGD49 to NZGD2000 (2)	4272 → 4167	4
NZGD49 to NZGD2000 (1)	4272 → 4167	5
NZGD49 to WGS 84 (4)	4272 → 4326	5
NZGD49 to WGS 84 (1)	4272 → 4326	8
NZGD49 to NZGD2000 (2) Deprecated	4272 → 4167	—
NZGD49 to WGS 84 (3) Deprecated	4272 → 4326	—

Other CRS using New Zealand Geodetic Datum 1949 (34)

Frequently Asked Questions

How do I add EPSG:27230 to GeoServer?

Add the following definition to your GeoServer configuration:

27230=PROJCS["NZGD49 / Observation Point Circuit",GEOGCS["NZGD49",DATUM["New_Zealand_Geodetic_Datum_1949",SPHEROID["International 1924",6378388,297],EXTENSION["PROJ4_GRIDS","nzgd2kgrid0005.gsb"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4272"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-45.8161966111111],PARAMETER["central_meridian",170.628595166667],PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],PARAMETER["false_northing",700000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","27230"]]

Read the full GeoServer guide →

How do I add EPSG:27230 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (27230, 'EPSG', 27230, '+proj=tmerc +lat_0=-45.8161966111111 +lon_0=170.628595166667 +k=1 +x_0=300000 +y_0=700000 +ellps=intl +nadgrids=nzgd2kgrid0005.gsb +units=m +no_defs +type=crs', 'PROJCS["NZGD49 / Observation Point Circuit",GEOGCS["NZGD49",DATUM["New_Zealand_Geodetic_Datum_1949",SPHEROID["International 1924",6378388,297],EXTENSION["PROJ4_GRIDS","nzgd2kgrid0005.gsb"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4272"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-45.8161966111111],PARAMETER["central_meridian",170.628595166667],PARAMETER["scale_factor",1],PARAMETER["false_easting",300000],PARAMETER["false_northing",700000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","27230"]]');

Read the full PostGIS guide →

How do I add EPSG:27230 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=tmerc"
  "+lat_0=-45.8161966111111"
  "+lon_0=170.628595166667"
  "+k=1"
  "+x_0=300000"
  "+y_0=700000"
  "+ellps=intl"
  "+nadgrids=nzgd2kgrid0005.gsb"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:27230 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:27230", "+proj=tmerc +lat_0=-45.8161966111111 +lon_0=170.628595166667 +k=1 +x_0=300000 +y_0=700000 +ellps=intl +nadgrids=nzgd2kgrid0005.gsb +units=m +no_defs +type=crs");

Read the full Proj4js guide →