RGF93 v2b / CC50

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 RGF93 v2b (1), code 9889. Note that grid file parameters are of opposite sign. Parameter file is from RGF93 v1 to NTF (code 15958), assuming that RGF93 v1 is equivalent to RGF93 v2b within the accuracy of the CT.

Information source: IOGP

Revision date: 2022-01-24

Attributes

Unit: metre

Geodetic CRS: RGF93 v2b

Datum: Reseau Geodesique Francais 1993 v2b

Ellipsoid: GRS 1980

Prime meridian: Greenwich

Data source: EPSG

Information source: IGN Paris

Revision date: 2021-09-08

Scope: Cadastre, engineering survey.

Area of use: France - mainland onshore north of 49°N.

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

Covered area powered by MapTiler

Center coordinates
1652071.22 8780185.14

Projected bounds:
1035034.34 8230677.34
2260493.81 9355766.18

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[
        PROJCRS["RGF93 v2b / CC50",
            BASEGEOGCRS["RGF93 v2b",
                DATUM["Reseau Geodesique Francais 1993 v2b",
                    ELLIPSOID["GRS 1980",6378137,298.257222101,
                        LENGTHUNIT["metre",1]]],
                PRIMEM["Greenwich",0,
                    ANGLEUNIT["degree",0.0174532925199433]],
                ID["EPSG",9782]],
            CONVERSION["France Conic Conformal zone 9",
                METHOD["Lambert Conic Conformal (2SP)",
                    ID["EPSG",9802]],
                PARAMETER["Latitude of false origin",50,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8821]],
                PARAMETER["Longitude of false origin",3,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8822]],
                PARAMETER["Latitude of 1st standard parallel",49.25,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8823]],
                PARAMETER["Latitude of 2nd standard parallel",50.75,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8824]],
                PARAMETER["Easting at false origin",1700000,
                    LENGTHUNIT["metre",1],
                    ID["EPSG",8826]],
                PARAMETER["Northing at false origin",9200000,
                    LENGTHUNIT["metre",1],
                    ID["EPSG",8827]]],
            CS[Cartesian,2],
                AXIS["easting (X)",east,
                    ORDER[1],
                    LENGTHUNIT["metre",1]],
                AXIS["northing (Y)",north,
                    ORDER[2],
                    LENGTHUNIT["metre",1]],
            USAGE[
                SCOPE["Cadastre, engineering survey."],
                AREA["France - mainland onshore north of 49°N."],
                BBOX[49,-2.03,51.14,8.08]],
            ID["EPSG",9850]]],
    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["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 RGF93 v2b (1), code 9889. Note that grid file parameters are of opposite sign. Parameter file is from RGF93 v1 to NTF (code 15958), assuming that RGF93 v1 is equivalent to RGF93 v2b within the accuracy of the CT."]]]

Definition: PROJ.4

+proj=lcc +lat_0=50 +lon_0=3 +lat_1=49.25 +lat_2=50.75 +x_0=1700000 +y_0=9200000 +ellps=GRS80 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:9850","+proj=lcc +lat_0=50 +lon_0=3 +lat_1=49.25 +lat_2=50.75 +x_0=1700000 +y_0=9200000 +ellps=GRS80 +units=m +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": "ProjectedCRS",
        "name": "RGF93 v2b / CC50",
        "base_crs": {
            "name": "RGF93 v2b",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "Reseau Geodesique Francais 1993 v2b",
                "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
            }
        },
        "conversion": {
            "name": "France Conic Conformal zone 9",
            "method": {
                "name": "Lambert Conic Conformal (2SP)",
                "id": {
                    "authority": "EPSG",
                    "code": 9802
                }
            },
            "parameters": [
                {
                    "name": "Latitude of false origin",
                    "value": 50,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8821
                    }
                },
                {
                    "name": "Longitude of false origin",
                    "value": 3,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8822
                    }
                },
                {
                    "name": "Latitude of 1st standard parallel",
                    "value": 49.25,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8823
                    }
                },
                {
                    "name": "Latitude of 2nd standard parallel",
                    "value": 50.75,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8824
                    }
                },
                {
                    "name": "Easting at false origin",
                    "value": 1700000,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8826
                    }
                },
                {
                    "name": "Northing at false origin",
                    "value": 9200000,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8827
                    }
                }
            ]
        },
        "coordinate_system": {
            "subtype": "Cartesian",
            "axis": [
                {
                    "name": "Easting",
                    "abbreviation": "X",
                    "direction": "east",
                    "unit": "metre"
                },
                {
                    "name": "Northing",
                    "abbreviation": "Y",
                    "direction": "north",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 9850
        }
    },
    "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": "RGF93 v2b to NTF (2)",
        "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=lcc"
	"lat_0=50"
	"lon_0=3"
	"lat_1=49.25"
	"lat_2=50.75"
	"x_0=1700000"
	"y_0=9200000"
	"ellps=GRS80"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=lcc +lat_0=50 +lon_0=3 +lat_1=49.25 +lat_2=50.75 +x_0=1700000 +y_0=9200000 +ellps=GRS80 +units=m +no_defs +type=crs">
	<Layer srs="+proj=lcc +lat_0=50 +lon_0=3 +lat_1=49.25 +lat_2=50.75 +x_0=1700000 +y_0=9200000 +ellps=GRS80 +units=m +no_defs +type=crs">
	</Layer>
</Map>

EPSG:9850

Available transformations to EPSG:4275 EPSG:4258 - ETRS89 EPSG:4275 - NTF EPSG:4326 - WGS 84

Selected transformation

Attributes

Covered area powered by MapTiler

Export

Available transformations

to EPSG:4275

EPSG:4258 - ETRS89

EPSG:4275 - NTF

EPSG:4326 - WGS 84