EPSG:3947 RGF93 v1 / CC47
Projected system (Lambert Conic Conformal (2SP)) in use: France - mainland - 46°N to 48°N. The full definition below, and conversion in one click.
| Code | EPSG:3947 |
|---|---|
| Name | RGF93 v1 / CC47 |
| Type | Projected system — Lambert Conic Conformal (2SP) |
| Area of use |
France - mainland - 46°N to 48°N France - mainland onshore between 46°N and 48°N. |
| Bounds | W -4,77° · S 46,00° · E 7,63° · N 48,00° |
| Countries | France |
| Datum | Reseau Geodesique Francais 1993 v1 |
| Ellipsoid | GRS 1980 a = 6378137 m · 1/f = 298.257222101 |
| Base geographic system | EPSG:4171 — RGF93 v1 |
| Unit | metre (X east, Y north) |
| Transformation to WGS 84 | RGF93 v1 to WGS 84 (1) (EPSG:1671) — accuracy 1 m |
| Scope | Cadastre, engineering survey. |
| In Carte | Built-in grid (code FCC47), with the reference cities of the guide. |
Projection parameters
| Parameter | Value | Unit |
|---|---|---|
| Latitude of false origin | 47 | degree |
| Longitude of false origin | 3 | degree |
| Latitude of 1st standard parallel | 46.25 | degree |
| Latitude of 2nd standard parallel | 47.75 | degree |
| Easting at false origin | 1700000 | metre |
| Northing at false origin | 6200000 | metre |
proj4 definition
+proj=lcc +lat_1=46.25 +lat_2=47.75 +lat_0=47 +lon_0=3 +x_0=1700000 +y_0=6200000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defsPaste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:3947.
WKT (ESRI format, the .prj content)
PROJCS["RGF_1993_CC47",GEOGCS["GCS_RGF_1993",DATUM["D_RGF_1993",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",1700000.0],PARAMETER["False_Northing",6200000.0],PARAMETER["Central_Meridian",3.0],PARAMETER["Standard_Parallel_1",46.25],PARAMETER["Standard_Parallel_2",47.75],PARAMETER["Latitude_Of_Origin",47.0],UNIT["Meter",1.0]]Other systems — France
- EPSG:2154RGF93 v1 / Lambert-93
- EPSG:3942RGF93 v1 / CC42
- EPSG:3943RGF93 v1 / CC43
- EPSG:3944RGF93 v1 / CC44
- EPSG:3945RGF93 v1 / CC45
- EPSG:3946RGF93 v1 / CC46
- EPSG:3948RGF93 v1 / CC48
- EPSG:3949RGF93 v1 / CC49
- EPSG:3950RGF93 v1 / CC50
- EPSG:4171RGF93 v1
- EPSG:4275NTF
- EPSG:4807NTF (Paris)
- EPSG:4901ATF (Paris)
- EPSG:5627ED50 / TM 6 NE
- EPSG:7084RGF93 v1 (lon-lat)
- EPSG:9547LTF2004(G)
- EPSG:9549LTF2004(C)
- EPSG:9777RGF93 v2
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.