EPSG:3942 — ETRS89-FRA [RGF93 v1] / CC42

Projected · France - mainland south of 43°N and Corsica

Export Formats

OGC WKT

PROJCS[
    "RGF93 v1 / CC42",
    GEOGCS[
        "RGF93 v1",
        DATUM[
            "Reseau_Geodesique_Francais_1993_v1",
            SPHEROID["GRS 1980",6378137,298.257222101],
            TOWGS84[0,0,0,0,0,0,0]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4171"]
    ],
    PROJECTION["Lambert_Conformal_Conic_2SP"],
    PARAMETER["latitude_of_origin",42],
    PARAMETER["central_meridian",3],
    PARAMETER["standard_parallel_1",41.25],
    PARAMETER["standard_parallel_2",42.75],
    PARAMETER["false_easting",1700000],
    PARAMETER["false_northing",1200000],
    UNIT["metre",1,AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","3942"]
]

WKT2

PROJCRS[
    "ETRS89-FRA [RGF93 v1] / CC42",
    BASEGEOGCRS[
        "ETRS89-FRA [RGF93 v1]",
        DATUM[
            "Reseau Geodesique Francais 1993 v1",
            ELLIPSOID[
                "GRS 1980",
                6378137,
                298.257222101,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7019]
            ],
            ANCHOREPOCH[1993],
            ID["EPSG",6171]
        ],
        ID["EPSG",4171]
    ],
    CONVERSION[
        "France Conic Conformal zone 1",
        METHOD["Lambert Conic Conformal (2SP)",ID["EPSG",9802]],
        PARAMETER[
            "Latitude of false origin",
            42,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8821]
        ],
        PARAMETER[
            "Longitude of false origin",
            3,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8822]
        ],
        PARAMETER[
            "Latitude of 1st standard parallel",
            41.25,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8823]
        ],
        PARAMETER[
            "Latitude of 2nd standard parallel",
            42.75,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8824]
        ],
        PARAMETER[
            "Easting at false origin",
            1700000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8826]
        ],
        PARAMETER[
            "Northing at false origin",
            1200000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8827]
        ],
        ID["EPSG",18101]
    ],
    CS[Cartesian,2,ID["EPSG",4499]],
    AXIS["Easting (X)",east],
    AXIS["Northing (Y)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",3942]
]

PROJ.4

+proj=lcc +lat_0=42 +lon_0=3 +lat_1=41.25 +lat_2=42.75 +x_0=1700000 +y_0=1200000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:3942", "+proj=lcc +lat_0=42 +lon_0=3 +lat_1=41.25 +lat_2=42.75 +x_0=1700000 +y_0=1200000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 3942,
  "name": "ETRS89-FRA [RGF93 v1] / CC42",
  "kind": "projected",
  "area": "France - mainland south of 43°N and Corsica",
  "unit": "metre",
  "bbox": [
    41.31,
    -1.06,
    43.07,
    9.63
  ],
  "proj4": "+proj=lcc +lat_0=42 +lon_0=3 +lat_1=41.25 +lat_2=42.75 +x_0=1700000 +y_0=1200000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs"
}

PostGIS

How to add a projection to PostGIS? →

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (3942, 'EPSG', 3942, '+proj=lcc +lat_0=42 +lon_0=3 +lat_1=41.25 +lat_2=42.75 +x_0=1700000 +y_0=1200000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["RGF93 v1 / CC42",GEOGCS["RGF93 v1",DATUM["Reseau_Geodesique_Francais_1993_v1",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4171"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["latitude_of_origin",42],PARAMETER["central_meridian",3],PARAMETER["standard_parallel_1",41.25],PARAMETER["standard_parallel_2",42.75],PARAMETER["false_easting",1700000],PARAMETER["false_northing",1200000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3942"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=lcc"
  "+lat_0=42"
  "+lon_0=3"
  "+lat_1=41.25"
  "+lat_2=42.75"
  "+x_0=1700000"
  "+y_0=1200000"
  "+ellps=GRS80"
  "+towgs84=0,0,0,0,0,0,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

3942=PROJCS["RGF93 v1 / CC42",GEOGCS["RGF93 v1",DATUM["Reseau_Geodesique_Francais_1993_v1",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4171"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["latitude_of_origin",42],PARAMETER["central_meridian",3],PARAMETER["standard_parallel_1",41.25],PARAMETER["standard_parallel_2",42.75],PARAMETER["false_easting",1700000],PARAMETER["false_northing",1200000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3942"]]

Related Coordinate Systems

Available Transformations (11)

Transformations inherited from base CRS: EPSG:4171 (ETRS89-FRA [RGF93 v1])

Transformation	Source → Target	Accuracy (m)
ETRS89-FRA [RGF93 v1] to ETRS89-FRA [RGF93 v2] (1)	4171 → 9777	0.05
ETRS89-FRA [RGF93 v1] to WGS 84 (1)	4171 → 4326	1
ETRS89-FRA [RGF93 v1] to NTF (2)	4171 → 4275	1
NTF to ETRS89-FRA [RGF93 v1] (1)	4275 → 4171	1
NTF (Paris) to ETRS89-FRA [RGF93 v1] (2)	4807 → 4171	1
NTF (Paris) to ETRS89-FRA [RGF93 v1] (1)	4807 → 4171	1
NTF to RGF93 (1) Deprecated	4275 → 4171	1
NTF to RGF93 (2) Deprecated	4275 → 4171	1
RGF93 v1 to ETRS89 (1) Deprecated	4171 → 4258	0.1
NTF (Paris) to RGF93 (1) Deprecated	4807 → 4171	1

Other CRS using Reseau Geodesique Francais 1993 v1 (14)

Frequently Asked Questions

How do I add EPSG:3942 to GeoServer?

Add the following definition to your GeoServer configuration:

3942=PROJCS["RGF93 v1 / CC42",GEOGCS["RGF93 v1",DATUM["Reseau_Geodesique_Francais_1993_v1",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4171"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["latitude_of_origin",42],PARAMETER["central_meridian",3],PARAMETER["standard_parallel_1",41.25],PARAMETER["standard_parallel_2",42.75],PARAMETER["false_easting",1700000],PARAMETER["false_northing",1200000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3942"]]

Read the full GeoServer guide →

How do I add EPSG:3942 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (3942, 'EPSG', 3942, '+proj=lcc +lat_0=42 +lon_0=3 +lat_1=41.25 +lat_2=42.75 +x_0=1700000 +y_0=1200000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["RGF93 v1 / CC42",GEOGCS["RGF93 v1",DATUM["Reseau_Geodesique_Francais_1993_v1",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4171"]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["latitude_of_origin",42],PARAMETER["central_meridian",3],PARAMETER["standard_parallel_1",41.25],PARAMETER["standard_parallel_2",42.75],PARAMETER["false_easting",1700000],PARAMETER["false_northing",1200000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","3942"]]');

Read the full PostGIS guide →

How do I add EPSG:3942 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=lcc"
  "+lat_0=42"
  "+lon_0=3"
  "+lat_1=41.25"
  "+lat_2=42.75"
  "+x_0=1700000"
  "+y_0=1200000"
  "+ellps=GRS80"
  "+towgs84=0,0,0,0,0,0,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:3942 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:3942", "+proj=lcc +lat_0=42 +lon_0=3 +lat_1=41.25 +lat_2=42.75 +x_0=1700000 +y_0=1200000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs");

Read the full Proj4js guide →