EPSG:8444

GDA94 to GDA2020 (4)

Attributes

Geodetic CRS: GDA94

Datum: Geocentric Datum of Australia 1994

Ellipsoid: GRS 1980

Prime meridian: Greenwich

Data source: EPSG

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

Revision date: 2019-09-17

Scope: Geodesy.

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

Method: NTv2

Area of use: Christmas Island - onshore.

Description: (0,)

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Christmas Island - onshore.

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Definition: OGC Well Known Text 2 (2019)

COORDINATEOPERATION["GDA94 to GDA2020 (4)",
    VERSION["ICSM-Cxr Conf"],
    SOURCECRS[
        GEOGCRS["GDA94",
            DATUM["Geocentric Datum of Australia 1994",
                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]],
            ID["EPSG",4283]]],
    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]],
            ID["EPSG",7844]]],
    METHOD["NTv2",
        ID["EPSG",9615]],
    PARAMETERFILE["Latitude and longitude difference file","GDA94_GDA2020_conformal_christmas_island.gsb"],
    OPERATIONACCURACY[0.05],
    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=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=au_icsm_GDA94_GDA2020_conformal_christmas_island.tif +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:8444","+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=au_icsm_GDA94_GDA2020_conformal_christmas_island.tif +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Transformation",
    "name": "GDA94 to GDA2020 (4)",
    "source_crs": {
        "type": "GeographicCRS",
        "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
        }
    },
    "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
        }
    },
    "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
            }
        }
    ],
    "accuracy": "0.05",
    "scope": "Geodesy.",
    "area": "Christmas Island - onshore.",
    "bbox": {
        "south_latitude": -10.63,
        "west_longitude": 105.48,
        "north_latitude": -10.36,
        "east_longitude": 105.77
    },
    "id": {
        "authority": "EPSG",
        "code": 8444
    },
    "remarks": "See GDA94 to GDA2020 (1) (code 8048) for transformation using Helmert method which gives identical results."
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=pipeline"
	"step"
	"proj=axisswap"
	"order=2,1"
	"step"
	"proj=unitconvert"
	"xy_in=deg"
	"xy_out=rad"
	"step"
	"proj=hgridshift"
	"grids=au_icsm_GDA94_GDA2020_conformal_christmas_island.tif"
	"step"
	"proj=unitconvert"
	"xy_in=rad"
	"xy_out=deg"
	"step"
	"proj=axisswap"
	"order=2,1"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=au_icsm_GDA94_GDA2020_conformal_christmas_island.tif +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1">
	<Layer srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=au_icsm_GDA94_GDA2020_conformal_christmas_island.tif +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 8444, 'EPSG', 8444, '+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=au_icsm_GDA94_GDA2020_conformal_christmas_island.tif +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1', 'None');