EPSG:9961

WGS 84 (G730) to WGS 84 (G873) (1)

Attributes

Geodetic CRS: WGS 84 (G730)

Datum: World Geodetic System 1984 (G730)

Ellipsoid: WGS 84

Prime meridian: Greenwich

Data source: EPSG

Information source: Kelly and Dennis, "Transforming between WGS84 Realizations", Journal of Surveying Engineering 148(2), January 2022 (table 6).

Revision date: 2022-05-18

Scope: Spatial referencing.

Remarks: Scale difference in ppb where 1/billion = 1E-9 or nm/m. Derived via ITRF91 through ITRF94 at epoch 1995.5. Parameter values valid at other epochs including 2005.0.

Method: Coordinate Frame rotation (geocentric domain)

Area of use: World.

Description: (0,)

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Definition: OGC Well Known Text 2 (2019)

COORDINATEOPERATION["WGS 84 (G730) to WGS 84 (G873) (1)",
    VERSION["KD2022-Wld"],
    SOURCECRS[
        GEODCRS["WGS 84 (G730)",
            DYNAMIC[
                FRAMEEPOCH[1994]],
            DATUM["World Geodetic System 1984 (G730)",
                ELLIPSOID["WGS 84",6378137,298.257223563,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[Cartesian,3],
                AXIS["(X)",geocentricX,
                    ORDER[1],
                    LENGTHUNIT["metre",1]],
                AXIS["(Y)",geocentricY,
                    ORDER[2],
                    LENGTHUNIT["metre",1]],
                AXIS["(Z)",geocentricZ,
                    ORDER[3],
                    LENGTHUNIT["metre",1]],
            ID["EPSG",7656]]],
    TARGETCRS[
        GEODCRS["WGS 84 (G873)",
            DYNAMIC[
                FRAMEEPOCH[1997]],
            DATUM["World Geodetic System 1984 (G873)",
                ELLIPSOID["WGS 84",6378137,298.257223563,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[Cartesian,3],
                AXIS["(X)",geocentricX,
                    ORDER[1],
                    LENGTHUNIT["metre",1]],
                AXIS["(Y)",geocentricY,
                    ORDER[2],
                    LENGTHUNIT["metre",1]],
                AXIS["(Z)",geocentricZ,
                    ORDER[3],
                    LENGTHUNIT["metre",1]],
            ID["EPSG",7658]]],
    METHOD["Coordinate Frame rotation (geocentric domain)",
        ID["EPSG",1032]],
    PARAMETER["X-axis translation",-20,
        LENGTHUNIT["millimetre",0.001],
        ID["EPSG",8605]],
    PARAMETER["Y-axis translation",-16,
        LENGTHUNIT["millimetre",0.001],
        ID["EPSG",8606]],
    PARAMETER["Z-axis translation",14,
        LENGTHUNIT["millimetre",0.001],
        ID["EPSG",8607]],
    PARAMETER["X-axis rotation",0,
        ANGLEUNIT["milliarc-second",4.84813681109536E-09],
        ID["EPSG",8608]],
    PARAMETER["Y-axis rotation",0,
        ANGLEUNIT["milliarc-second",4.84813681109536E-09],
        ID["EPSG",8609]],
    PARAMETER["Z-axis rotation",0,
        ANGLEUNIT["milliarc-second",4.84813681109536E-09],
        ID["EPSG",8610]],
    PARAMETER["Scale difference",-0.69,
        SCALEUNIT["parts per billion",1E-09],
        ID["EPSG",8611]],
    OPERATIONACCURACY[0.04],
    USAGE[
        SCOPE["Spatial referencing."],
        AREA["World."],
        BBOX[-90,-180,90,180]],
    ID["EPSG",9961],
    REMARK["Scale difference in ppb where 1/billion = 1E-9 or nm/m. Derived via ITRF91 through ITRF94 at epoch 1995.5. Parameter values valid at other epochs including 2005.0."]]

Definition: PROJ.4

+proj=helmert +x=-0.02 +y=-0.016 +z=0.014 +rx=0 +ry=0 +rz=0 +s=-0.00069 +convention=coordinate_frame

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:9961","+proj=helmert +x=-0.02 +y=-0.016 +z=0.014 +rx=0 +ry=0 +rz=0 +s=-0.00069 +convention=coordinate_frame");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Transformation",
    "name": "WGS 84 (G730) to WGS 84 (G873) (1)",
    "source_crs": {
        "type": "GeodeticCRS",
        "name": "WGS 84 (G730)",
        "datum": {
            "type": "DynamicGeodeticReferenceFrame",
            "name": "World Geodetic System 1984 (G730)",
            "frame_reference_epoch": 1994,
            "ellipsoid": {
                "name": "WGS 84",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257223563
            }
        },
        "coordinate_system": {
            "subtype": "Cartesian",
            "axis": [
                {
                    "name": "Geocentric X",
                    "abbreviation": "X",
                    "direction": "geocentricX",
                    "unit": "metre"
                },
                {
                    "name": "Geocentric Y",
                    "abbreviation": "Y",
                    "direction": "geocentricY",
                    "unit": "metre"
                },
                {
                    "name": "Geocentric Z",
                    "abbreviation": "Z",
                    "direction": "geocentricZ",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 7656
        }
    },
    "target_crs": {
        "type": "GeodeticCRS",
        "name": "WGS 84 (G873)",
        "datum": {
            "type": "DynamicGeodeticReferenceFrame",
            "name": "World Geodetic System 1984 (G873)",
            "frame_reference_epoch": 1997,
            "ellipsoid": {
                "name": "WGS 84",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257223563
            }
        },
        "coordinate_system": {
            "subtype": "Cartesian",
            "axis": [
                {
                    "name": "Geocentric X",
                    "abbreviation": "X",
                    "direction": "geocentricX",
                    "unit": "metre"
                },
                {
                    "name": "Geocentric Y",
                    "abbreviation": "Y",
                    "direction": "geocentricY",
                    "unit": "metre"
                },
                {
                    "name": "Geocentric Z",
                    "abbreviation": "Z",
                    "direction": "geocentricZ",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 7658
        }
    },
    "method": {
        "name": "Coordinate Frame rotation (geocentric domain)",
        "id": {
            "authority": "EPSG",
            "code": 1032
        }
    },
    "parameters": [
        {
            "name": "X-axis translation",
            "value": -20,
            "unit": {
                "type": "LinearUnit",
                "name": "millimetre",
                "conversion_factor": 0.001
            },
            "id": {
                "authority": "EPSG",
                "code": 8605
            }
        },
        {
            "name": "Y-axis translation",
            "value": -16,
            "unit": {
                "type": "LinearUnit",
                "name": "millimetre",
                "conversion_factor": 0.001
            },
            "id": {
                "authority": "EPSG",
                "code": 8606
            }
        },
        {
            "name": "Z-axis translation",
            "value": 14,
            "unit": {
                "type": "LinearUnit",
                "name": "millimetre",
                "conversion_factor": 0.001
            },
            "id": {
                "authority": "EPSG",
                "code": 8607
            }
        },
        {
            "name": "X-axis rotation",
            "value": 0,
            "unit": {
                "type": "AngularUnit",
                "name": "milliarc-second",
                "conversion_factor": 4.84813681109536e-09
            },
            "id": {
                "authority": "EPSG",
                "code": 8608
            }
        },
        {
            "name": "Y-axis rotation",
            "value": 0,
            "unit": {
                "type": "AngularUnit",
                "name": "milliarc-second",
                "conversion_factor": 4.84813681109536e-09
            },
            "id": {
                "authority": "EPSG",
                "code": 8609
            }
        },
        {
            "name": "Z-axis rotation",
            "value": 0,
            "unit": {
                "type": "AngularUnit",
                "name": "milliarc-second",
                "conversion_factor": 4.84813681109536e-09
            },
            "id": {
                "authority": "EPSG",
                "code": 8610
            }
        },
        {
            "name": "Scale difference",
            "value": -0.69,
            "unit": {
                "type": "ScaleUnit",
                "name": "parts per billion",
                "conversion_factor": 1e-09
            },
            "id": {
                "authority": "EPSG",
                "code": 8611
            }
        }
    ],
    "accuracy": "0.04",
    "scope": "Spatial referencing.",
    "area": "World.",
    "bbox": {
        "south_latitude": -90,
        "west_longitude": -180,
        "north_latitude": 90,
        "east_longitude": 180
    },
    "id": {
        "authority": "EPSG",
        "code": 9961
    },
    "remarks": "Scale difference in ppb where 1/billion = 1E-9 or nm/m. Derived via ITRF91 through ITRF94 at epoch 1995.5. Parameter values valid at other epochs including 2005.0."
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=helmert"
	"x=-0.02"
	"y=-0.016"
	"z=0.014"
	"rx=0"
	"ry=0"
	"rz=0"
	"s=-0.00069"
	"convention=coordinate_frame"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=helmert +x=-0.02 +y=-0.016 +z=0.014 +rx=0 +ry=0 +rz=0 +s=-0.00069 +convention=coordinate_frame">
	<Layer srs="+proj=helmert +x=-0.02 +y=-0.016 +z=0.014 +rx=0 +ry=0 +rz=0 +s=-0.00069 +convention=coordinate_frame">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 9961, 'EPSG', 9961, '+proj=helmert +x=-0.02 +y=-0.016 +z=0.014 +rx=0 +ry=0 +rz=0 +s=-0.00069 +convention=coordinate_frame', 'None');