CI1979 / Chatham Islands Map Grid

New Zealand - Chatham Islands group - onshore. , accuracy 2.0 m, code 1081 (default) [7]

Selected transformation

Method: Coordinate Frame rotation (geog2D domain)

Remarks: Derived at 4 stations using concatenation through WGS72. Parameter vales are also used to transform CI1979 to NZGD2000 - see tfm code 1082.

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

Revision date: 2020-03-14

Attributes

Unit: metre

Geodetic CRS: Chatham Islands 1979

Datum: Chatham Islands Datum 1979

Ellipsoid: International 1924

Prime meridian: Greenwich

Data source: EPSG

Information source: Land Information New Zealand.

Revision date: 2011-05-31

Scope: Cadastre, engineering survey, topographic mapping.

Remarks: Replaces CI1971 / CIMG (CRS code 5518). Replaced by NZGD2000 / Chatham Islands TM 2000 (CRS code 3793).

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

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

Covered area powered by MapTiler

Center coordinates
358402.18 653275.3

Projected bounds:
289118.9 578382.91
427874.13 727720.8

WGS84 bounds:
-177.25 -44.64
-175.54 -43.3

New Zealand - Chatham Islands group - onshore.

Definition: OGC Well Known Text

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PROJCS["CI1979 / Chatham Islands Map Grid",
    GEOGCS["Chatham Islands 1979",
        DATUM["Chatham_Islands_Datum_1979",
            SPHEROID["International 1924",6378388,297],
            TOWGS84[174.05,-25.49,112.57,0,0,-0.554,0.2263]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4673"]],
    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","9001"]],
    AUTHORITY["EPSG","5519"]]

Definition: OGC Well Known Text 2 (2019)

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PROJCRS["CI1979 / Chatham Islands Map Grid",
    BASEGEOGCRS["Chatham Islands 1979",
        DATUM["Chatham Islands Datum 1979",
            ELLIPSOID["International 1924",6378388,297,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4673]],
    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",5519]]

Definition: ESRI Well Known Text

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PROJCS["Chatham_Islands_1979_Map_Grid",
    GEOGCS["GCS_Chatham_Islands_1979",
        DATUM["D_Chatham_Islands_1979",
            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=174.05,-25.49,112.57,0,0,-0.554,0.2263 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:5519","+proj=tmerc +lat_0=-44 +lon_0=-176.5 +k=1 +x_0=350000 +y_0=650000 +ellps=intl +towgs84=174.05,-25.49,112.57,0,0,-0.554,0.2263 +units=m +no_defs +type=crs");

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "CI1979 / Chatham Islands Map Grid",
    "base_crs": {
        "name": "Chatham Islands 1979",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Chatham Islands Datum 1979",
            "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": 4673
        }
    },
    "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": 5519
    }
}

Definition: GeoServer

5519=PROJCS["CI1979 / Chatham Islands Map Grid",GEOGCS["Chatham Islands 1979",DATUM["Chatham_Islands_Datum_1979",SPHEROID["International 1924",6378388,297],TOWGS84[174.05,-25.49,112.57,0,0,-0.554,0.2263]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4673"]],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","9001"]],AUTHORITY["EPSG","5519"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=-44"
	"lon_0=-176.5"
	"k=1"
	"x_0=350000"
	"y_0=650000"
	"ellps=intl"
	"towgs84=174.05,-25.49,112.57,0,0,-0.554,0.2263"
	"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=174.05,-25.49,112.57,0,0,-0.554,0.2263 +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=174.05,-25.49,112.57,0,0,-0.554,0.2263 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 5519, 'EPSG', 5519, '+proj=tmerc +lat_0=-44 +lon_0=-176.5 +k=1 +x_0=350000 +y_0=650000 +ellps=intl +towgs84=174.05,-25.49,112.57,0,0,-0.554,0.2263 +units=m +no_defs +type=crs', 'PROJCS["CI1979 / Chatham Islands Map Grid",GEOGCS["Chatham Islands 1979",DATUM["Chatham_Islands_Datum_1979",SPHEROID["International 1924",6378388,297],TOWGS84[174.05,-25.49,112.57,0,0,-0.554,0.2263]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4673"]],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","9001"]],AUTHORITY["EPSG","5519"]]');

EPSG:5519