EPSG:5518

CI1971 / Chatham Islands Map Grid

Available transformations
to EPSG:4326
No other targets exist for this CRS

Selected transformation

Method: Geocentric translations (geog2D domain)

Remarks: Derived at 4 stations. Accuracy 15m in each axis.

Information source: U.S. Defense Mapping Agency TR8350.2 rev 3, January 2000. http://earth-info.nga.mil/GandG/tr8350/tr8350_2.html

Revision date: 2020-03-14

Attributes

Unit: metre

Geodetic CRS: Chatham Islands 1971

Datum: Chatham Islands Datum 1971

Ellipsoid: International 1924

Prime meridian: Greenwich

Data source: EPSG

Information source: Land Information New Zealand.

Revision date: 2011-05-12

Scope: Cadastre, engineering survey, topographic mapping.

Remarks: Replaced by CI1979 / CIMG (CRS code 5519).

Area of use: New Zealand - Chatham Islands group - onshore.

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

Center coordinates
358377.29 653275.14

Projected bounds:
290447.07 578557.6
427849.09 727273.4

WGS84 bounds:
-177.25 -44.64
-175.54 -43.3

New Zealand - Chatham Islands group - onshore.
MapTiler banner

Definition: Well Known Text (WKT)

PROJCS["CI1971 / Chatham Islands Map Grid",
    GEOGCS["Chatham Islands 1971",
        DATUM["Chatham_Islands_Datum_1971",
            SPHEROID["International 1924",6378388,297],
            TOWGS84[175,-38,113,0,0,0,0]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4672"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",-44],
    PARAMETER["central_meridian",-176.5],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",350000],
    PARAMETER["false_northing",650000],
    UNIT["metre",1],
    AUTHORITY["EPSG","5518"]]

Definition: ESRI WKT

PROJCS["Chatham_Island_1971_Map_Grid",GEOGCS["GCS_Chatham_Island_1971",DATUM["D_Chatham_Island_1971",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",350000.0],PARAMETER["False_Northing",650000.0],PARAMETER["Central_Meridian",-176.5],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",-44.0],UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=tmerc +lat_0=-44 +lon_0=-176.5 +k=1 +x_0=350000 +y_0=650000 +ellps=intl +towgs84=175,-38,113,0,0,0,0 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:5518","+proj=tmerc +lat_0=-44 +lon_0=-176.5 +k=1 +x_0=350000 +y_0=650000 +ellps=intl +towgs84=175,-38,113,0,0,0,0 +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.4/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "CI1971 / Chatham Islands Map Grid",
    "base_crs": {
        "name": "Chatham Islands 1971",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Chatham Islands Datum 1971",
            "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": 4672
        }
    },
    "conversion": {
        "name": "Chatham Islands Map Grid",
        "method": {
            "name": "Transverse Mercator",
            "id": {
                "authority": "EPSG",
                "code": 9807
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": -44,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": -176.5,
                "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": 350000,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8806
                }
            },
            {
                "name": "False northing",
                "value": 650000,
                "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"
            }
        ]
    },
    "scope": "Cadastre, engineering survey, topographic mapping.",
    "area": "New Zealand - Chatham Islands group - onshore.",
    "bbox": {
        "south_latitude": -44.64,
        "west_longitude": -177.25,
        "north_latitude": -43.3,
        "east_longitude": -175.54
    },
    "id": {
        "authority": "EPSG",
        "code": 5518
    }
}

Definition: GeoServer

5518=PROJCS["CI1971 / Chatham Islands Map Grid",GEOGCS["Chatham Islands 1971",DATUM["Chatham_Islands_Datum_1971",SPHEROID["International 1924",6378388,297],TOWGS84[175,-38,113,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4672"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-44],PARAMETER["central_meridian",-176.5],PARAMETER["scale_factor",1],PARAMETER["false_easting",350000],PARAMETER["false_northing",650000],UNIT["metre",1],AUTHORITY["EPSG","5518"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=-44"
	"lon_0=-176.5"
	"k=1"
	"x_0=350000"
	"y_0=650000"
	"ellps=intl"
	"towgs84=175,-38,113,0,0,0,0"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=-44 +lon_0=-176.5 +k=1 +x_0=350000 +y_0=650000 +ellps=intl +towgs84=175,-38,113,0,0,0,0 +units=m +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=-44 +lon_0=-176.5 +k=1 +x_0=350000 +y_0=650000 +ellps=intl +towgs84=175,-38,113,0,0,0,0 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 5518, 'EPSG', 5518, '+proj=tmerc +lat_0=-44 +lon_0=-176.5 +k=1 +x_0=350000 +y_0=650000 +ellps=intl +towgs84=175,-38,113,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["CI1971 / Chatham Islands Map Grid",GEOGCS["Chatham Islands 1971",DATUM["Chatham_Islands_Datum_1971",SPHEROID["International 1924",6378388,297],TOWGS84[175,-38,113,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4672"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-44],PARAMETER["central_meridian",-176.5],PARAMETER["scale_factor",1],PARAMETER["false_easting",350000],PARAMETER["false_northing",650000],UNIT["metre",1],AUTHORITY["EPSG","5518"]]');

Definition: OGC WKT

PROJCS["CI1971 / Chatham Islands Map Grid",GEOGCS["Chatham Islands 1971",DATUM["Chatham_Islands_Datum_1971",SPHEROID["International 1924",6378388,297],TOWGS84[175,-38,113,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4672"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-44],PARAMETER["central_meridian",-176.5],PARAMETER["scale_factor",1],PARAMETER["false_easting",350000],PARAMETER["false_northing",650000],UNIT["metre",1],AUTHORITY["EPSG","5518"]]

Definition: OGC WKT 2 (2019)

PROJCRS["CI1971 / Chatham Islands Map Grid",BASEGEOGCRS["Chatham Islands 1971",DATUM["Chatham Islands Datum 1971",ELLIPSOID["International 1924",6378388,297,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4672]],CONVERSION["Chatham Islands Map Grid",METHOD["Transverse Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural origin",-44,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",-176.5,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale factor at natural origin",1,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False easting",350000,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",650000,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, engineering survey, topographic mapping."],AREA["New Zealand - Chatham Islands group - onshore."],BBOX[-44.64,-177.25,-43.3,-175.54]],ID["EPSG",5518]]