ETRS89-FRA [RGF93 v2b] (lon-lat)

France - onshore - mainland and Corsica. , accuracy 1.0 m, code 9891 (default) [grid]

Selected transformation

Method: NTv2

Grid Files: rgf93_ntf.gsb

Remarks: Emulation of transformation NTF to ETRS89-FRA [RGF93 v2b] (1), code 9889. Note that grid file parameters are of opposite sign. Parameter file is from ETRS89-FRA [RGF93 v1] to NTF (code 15958), assuming that ETRS89-FRA [RGF93 v1] is equivalent to ETRS89-FRA [RGF93 v2b] within the accuracy of the CT.

Information source: IOGP

Revision date: 2025-10-31

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: ETRS89-FRA [RGF93 v2b]

Datum: Reseau Geodesique Francais 1993 v2b

Ellipsoid: GRS 1980

Prime meridian: Greenwich

Data source: EPSG

Information source: IGN, http://www.ign.fr

Revision date: 2025-10-31

Scope: GIS.

Remarks: Replaces ETRS89-FRA [RGF93 v2] (CRS code 9779) from 2021-01-05. See CRS code 9782 for system with axes in sequence lat-lon to be used for air, land and sea navigation and safety of life purposes.

Area of use: France - onshore and offshore, mainland and Corsica (France métropolitaine including Corsica).

Coordinate system: Ellipsoidal 2D CS. Axes: longitude, latitude. Orientations: east, north. UoM: degree

Covered area powered by MapTiler

Center coordinates
inf inf

WGS84 bounds:
-4.87 41.31
9.63 51.14

France - onshore - mainland and Corsica.

Definition: OGC Well Known Text 2 (2019)

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BOUNDCRS[
    SOURCECRS[
        GEOGCRS["ETRS89-FRA [RGF93 v2b] (lon-lat)",
            DATUM["Reseau Geodesique Francais 1993 v2b",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]],
                ANCHOREPOCH[2019]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            USAGE[
                SCOPE["GIS."],
                AREA["France - onshore and offshore, mainland and Corsica (France métropolitaine including Corsica)."],
                BBOX[41.15,-9.86,51.56,10.38]],
            ID["EPSG",9784],
            REMARK["Replaces ETRS89-FRA [RGF93 v2] (CRS code 9779) from 2021-01-05. See CRS code 9782 for system with axes in sequence lat-lon to be used for air, land and sea navigation and safety of life purposes."]]],
    TARGETCRS[
        GEOGCRS["NTF",
            DATUM["Nouvelle Triangulation Francaise",
                ELLIPSOID["Clarke 1880 (IGN)",6378249.2,293.466021293627,
                    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."],
                AREA["France - onshore - mainland and Corsica."],
                BBOX[41.31,-4.87,51.14,9.63]],
            ID["EPSG",4275]]],
    ABRIDGEDTRANSFORMATION["ETRS89-FRA [RGF93 v2b] to NTF (2)",
        METHOD["NTv2",
            ID["EPSG",9615]],
        PARAMETERFILE["Latitude and longitude difference file","rgf93_ntf.gsb"],
        USAGE[
            SCOPE["Transformation of coordinates at 1m level of accuracy."],
            AREA["France - onshore - mainland and Corsica."],
            BBOX[41.31,-4.87,51.14,9.63]],
        ID["EPSG",9891],
        REMARK["Emulation of transformation NTF to ETRS89-FRA [RGF93 v2b] (1), code 9889. Note that grid file parameters are of opposite sign. Parameter file is from ETRS89-FRA [RGF93 v1] to NTF (code 15958), assuming that ETRS89-FRA [RGF93 v1] is equivalent to ETRS89-FRA [RGF93 v2b] within the accuracy of the CT."]]]

Definition: PROJ.4

+proj=longlat +ellps=GRS80 +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:9784","+proj=longlat +ellps=GRS80 +no_defs +type=crs");

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "GeographicCRS",
        "name": "ETRS89-FRA [RGF93 v2b] (lon-lat)",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Reseau Geodesique Francais 1993 v2b",
            "anchor_epoch": 2019,
            "ellipsoid": {
                "name": "GRS 1980",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257222101
            }
        },
        "coordinate_system": {
            "subtype": "ellipsoidal",
            "axis": [
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Lon",
                    "direction": "east",
                    "unit": "degree"
                },
                {
                    "name": "Geodetic latitude",
                    "abbreviation": "Lat",
                    "direction": "north",
                    "unit": "degree"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 9784
        },
        "remarks": "Replaces ETRS89-FRA [RGF93 v2] (CRS code 9779) from 2021-01-05. See CRS code 9782 for system with axes in sequence lat-lon to be used for air, land and sea navigation and safety of life purposes."
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "NTF",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Nouvelle Triangulation Francaise",
            "ellipsoid": {
                "name": "Clarke 1880 (IGN)",
                "semi_major_axis": 6378249.2,
                "semi_minor_axis": 6356515
            }
        },
        "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": 4275
        }
    },
    "transformation": {
        "name": "ETRS89-FRA [RGF93 v2b] to NTF (2)",
        "source_crs": {
            "type": "GeographicCRS",
            "name": "ETRS89-FRA [RGF93 v2b]",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "Reseau Geodesique Francais 1993 v2b",
                "anchor_epoch": 2019,
                "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": 9782
            },
            "remarks": "Replaces ETRS89-FRA [RGF93 v2] (CRS code 9777) from 2021-01-05. See CRS code 9784 for alternate system with axes reversed used by IGN for GIS purposes."
        },
        "method": {
            "name": "NTv2",
            "id": {
                "authority": "EPSG",
                "code": 9615
            }
        },
        "parameters": [
            {
                "name": "Latitude and longitude difference file",
                "value": "rgf93_ntf.gsb",
                "id": {
                    "authority": "EPSG",
                    "code": 8656
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 9891
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=GRS80"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=GRS80 +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=GRS80 +no_defs +type=crs">
	</Layer>
</Map>

EPSG:9784