EPSG:6721

GDA94 / CIG94

Transform Get position on a map

Available transformations
to EPSG:7844
EPSG:7844 - GDA2020

Selected transformation

Method: NTv2

Grid Files: GDA94_GDA2020_conformal_christmas_island.gsb

Remarks: See GDA94 to GDA2020 (1) (code 8048) for transformation using Helmert method which gives identical results.

Information source: GDA2020 Technical Manual (http://www.icsm.gov.au).

Revision date: 2019-09-17

Attributes

Unit: metre

Geodetic CRS: GDA94

Datum: Geocentric Datum of Australia 1994

Ellipsoid: GRS 1980

Prime meridian: Greenwich

Data source: EPSG

Information source: Landgate (Government of Western Australia), www.landgate.wa.gov.au.

Revision date: 2017-03-19

Scope: Cadastre, engineering survey. Usage restricted to areas below 290m above sea level.

Remarks: Usage restricted to areas below 290m above sea level. Replaces CIG85 and WGS 84 / CIG92 (CRS codes 6715 and 6721). Replaced by GDA2020 / CIG2020 (CRS code 8018).

Area of use: Christmas Island - onshore.

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

Covered area powered by MapTiler MapTiler logo
SimpleMap

Center coordinates
49998.94 139362.92

Projected bounds:
34118.63 124426.27
65879.25 154295.73

WGS84 bounds:
105.48 -10.63
105.77 -10.36

Christmas Island - onshore.
MapTiler banner

Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        PROJCRS["GDA94 / CIG94",
            BASEGEOGCRS["GDA94",
                DATUM["Geocentric Datum of Australia 1994",
                    ELLIPSOID["GRS 1980",6378137,298.257222101,
                        LENGTHUNIT["metre",1]]],
                PRIMEM["Greenwich",0,
                    ANGLEUNIT["degree",0.0174532925199433]],
                ID["EPSG",4283]],
            CONVERSION["Christmas Island Grid 1994",
                METHOD["Transverse Mercator",
                    ID["EPSG",9807]],
                PARAMETER["Latitude of natural origin",0,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8801]],
                PARAMETER["Longitude of natural origin",105.625,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8802]],
                PARAMETER["Scale factor at natural origin",1.00002514,
                    SCALEUNIT["unity",1],
                    ID["EPSG",8805]],
                PARAMETER["False easting",50000,
                    LENGTHUNIT["metre",1],
                    ID["EPSG",8806]],
                PARAMETER["False northing",1300000,
                    LENGTHUNIT["metre",1],
                    ID["EPSG",8807]]],
            CS[Cartesian,2],
                AXIS["(E)",east,
                    ORDER[1],
                    LENGTHUNIT["metre",1]],
                AXIS["(N)",north,
                    ORDER[2],
                    LENGTHUNIT["metre",1]],
            USAGE[
                SCOPE["Cadastre, engineering survey. Usage restricted to areas below 290m above sea level."],
                AREA["Christmas Island - onshore."],
                BBOX[-10.63,105.48,-10.36,105.77]],
            ID["EPSG",6721]]],
    TARGETCRS[
        GEOGCRS["GDA2020",
            DATUM["Geocentric Datum of Australia 2020",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]]],
            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["Geodesy, cadastre, engineering survey, topographic mapping."],
                AREA["Australia including Lord Howe Island, Macquarie Island, Ashmore and Cartier Islands, Christmas Island, Cocos (Keeling) Islands, Norfolk Island. All onshore and offshore."],
                BBOX[-60.55,93.41,-8.47,173.34]],
            ID["EPSG",7844]]],
    ABRIDGEDTRANSFORMATION["GDA94 to GDA2020 (4)",
        METHOD["NTv2",
            ID["EPSG",9615]],
        PARAMETERFILE["Latitude and longitude difference file","GDA94_GDA2020_conformal_christmas_island.gsb"],
        USAGE[
            SCOPE["Geodesy."],
            AREA["Christmas Island - onshore."],
            BBOX[-10.63,105.48,-10.36,105.77]],
        ID["EPSG",8444],
        REMARK["See GDA94 to GDA2020 (1) (code 8048) for transformation using Helmert method which gives identical results."]]]

Definition: PROJ.4

+proj=tmerc +lat_0=0 +lon_0=105.625 +k=1.00002514 +x_0=50000 +y_0=1300000 +ellps=GRS80 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:6721","+proj=tmerc +lat_0=0 +lon_0=105.625 +k=1.00002514 +x_0=50000 +y_0=1300000 +ellps=GRS80 +units=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "ProjectedCRS",
        "name": "GDA94 / CIG94",
        "base_crs": {
            "name": "GDA94",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "Geocentric Datum of Australia 1994",
                "ellipsoid": {
                    "name": "GRS 1980",
                    "semi_major_axis": 6378137,
                    "inverse_flattening": 298.257222101
                }
            },
            "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": 4283
            }
        },
        "conversion": {
            "name": "Christmas Island Grid 1994",
            "method": {
                "name": "Transverse Mercator",
                "id": {
                    "authority": "EPSG",
                    "code": 9807
                }
            },
            "parameters": [
                {
                    "name": "Latitude of natural origin",
                    "value": 0,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8801
                    }
                },
                {
                    "name": "Longitude of natural origin",
                    "value": 105.625,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8802
                    }
                },
                {
                    "name": "Scale factor at natural origin",
                    "value": 1.00002514,
                    "unit": "unity",
                    "id": {
                        "authority": "EPSG",
                        "code": 8805
                    }
                },
                {
                    "name": "False easting",
                    "value": 50000,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8806
                    }
                },
                {
                    "name": "False northing",
                    "value": 1300000,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8807
                    }
                }
            ]
        },
        "coordinate_system": {
            "subtype": "Cartesian",
            "axis": [
                {
                    "name": "Easting",
                    "abbreviation": "E",
                    "direction": "east",
                    "unit": "metre"
                },
                {
                    "name": "Northing",
                    "abbreviation": "N",
                    "direction": "north",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 6721
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "GDA2020",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Geocentric Datum of Australia 2020",
            "ellipsoid": {
                "name": "GRS 1980",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257222101
            }
        },
        "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": 7844
        }
    },
    "transformation": {
        "name": "GDA94 to GDA2020 (4)",
        "method": {
            "name": "NTv2",
            "id": {
                "authority": "EPSG",
                "code": 9615
            }
        },
        "parameters": [
            {
                "name": "Latitude and longitude difference file",
                "value": "GDA94_GDA2020_conformal_christmas_island.gsb",
                "id": {
                    "authority": "EPSG",
                    "code": 8656
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 8444
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=0"
	"lon_0=105.625"
	"k=1.00002514"
	"x_0=50000"
	"y_0=1300000"
	"ellps=GRS80"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=0 +lon_0=105.625 +k=1.00002514 +x_0=50000 +y_0=1300000 +ellps=GRS80 +units=m +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=0 +lon_0=105.625 +k=1.00002514 +x_0=50000 +y_0=1300000 +ellps=GRS80 +units=m +no_defs +type=crs">
	</Layer>
</Map>