ETRS89-FRA [RGF93 v1] (lon-lat)

France - onshore - mainland and Corsica. , accuracy 1.0 m, code 15958 (default) [grid]

Selected transformation

Method: NTv2

Grid Files: rgf93_ntf.gsb

Remarks: Emulation using NTv2 method of NTF to ETRS89-FRA [RGF93 v1] (1), code 9327. Note that grid file parameters are of opposite sign. May be taken as approximate CT to ETRS89 or WGS 84 (see codes 15959 and 15960). Also used to transform later realizations of RGF93 to NTF.

Information source: ESRI

Revision date: 2025-10-31

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: ETRS89-FRA [RGF93 v1]

Datum: Reseau Geodesique Francais 1993 v1

Ellipsoid: GRS 1980

Prime meridian: Greenwich

Data source: EPSG

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

Revision date: 2025-10-31

Scope: GIS.

Remarks: See CRS code 4171 for system with axes in sequence lat-lon to be used for air, land and sea navigation and safety of life purposes. Replaced by ETRS89-FRA [RGF93 v2] (lon-lat) (CRS code 9779) from 2010-06-18.

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 v1] (lon-lat)",
            DATUM["Reseau Geodesique Francais 1993 v1",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]],
                ANCHOREPOCH[1993]],
            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",7084],
            REMARK["See CRS code 4171 for system with axes in sequence lat-lon to be used for air, land and sea navigation and safety of life purposes. Replaced by ETRS89-FRA [RGF93 v2] (lon-lat) (CRS code 9779) from 2010-06-18."]]],
    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 v1] 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",15958],
        REMARK["Emulation using NTv2 method of NTF to ETRS89-FRA [RGF93 v1] (1), code 9327. Note that grid file parameters are of opposite sign. May be taken as approximate CT to ETRS89 or WGS 84 (see codes 15959 and 15960). Also used to transform later realizations of RGF93 to NTF."]]]

Definition: PROJ.4

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

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:7084","+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 v1] (lon-lat)",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Reseau Geodesique Francais 1993 v1",
            "anchor_epoch": 1993,
            "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": 7084
        },
        "remarks": "See CRS code 4171 for system with axes in sequence lat-lon to be used for air, land and sea navigation and safety of life purposes. Replaced by ETRS89-FRA [RGF93 v2] (lon-lat) (CRS code 9779) from 2010-06-18."
    },
    "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 v1] to NTF (2)",
        "source_crs": {
            "type": "GeographicCRS",
            "name": "ETRS89-FRA [RGF93 v1]",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "Reseau Geodesique Francais 1993 v1",
                "anchor_epoch": 1993,
                "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": 4171
            },
            "remarks": "See CRS code 7084 for alternate system with axes reversed used by IGN for GIS purposes. Replaced by ETRS89-FRA [RGF93 v2] (CRS code 9777) from 2010-06-18."
        },
        "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": 15958
        }
    }
}

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:7084