EPSG systems

EPSG:9843 RGF93 v2b / CC43

Projected system (Lambert Conic Conformal (2SP)) in use: France - mainland south of 44°N. The full definition below, and conversion in one click.

System record
CodeEPSG:9843
NameRGF93 v2b / CC43
TypeProjected system — Lambert Conic Conformal (2SP)
Area of use France - mainland south of 44°N
France - mainland onshore south of 44°N.
Bounds W -1,79° · S 42,33° · E 7,65° · N 44,01°
Countries France
DatumReseau Geodesique Francais 1993 v2b
Ellipsoid GRS 1980 a = 6378137 m · 1/f = 298.257222101
Base geographic system EPSG:9782 — RGF93 v2b
Unit metre (X east, Y north)
Transformation to WGS 84 RGF93 v2b to WGS 84 (1) (EPSG:9792) — accuracy 1 m
ScopeCadastre, engineering survey.

Projection parameters

ParameterValueUnit
Latitude of false origin43degree
Longitude of false origin3degree
Latitude of 1st standard parallel42.25degree
Latitude of 2nd standard parallel43.75degree
Easting at false origin1700000metre
Northing at false origin2200000metre

proj4 definition

+proj=lcc +lat_0=43 +lon_0=3 +lat_1=42.25 +lat_2=43.75 +x_0=1700000 +y_0=2200000 +ellps=GRS80 +units=m +towgs84=0,0,0 +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:9843.

WKT (ESRI format, the .prj content)

PROJCS["RGF93_v2b_CC43",GEOGCS["RGF93_v2b",DATUM["Reseau_Geodesique_Francais_1993_v2b",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",2200000.0],PARAMETER["Central_Meridian",3.0],PARAMETER["Standard_Parallel_1",42.25],PARAMETER["Standard_Parallel_2",43.75],PARAMETER["Latitude_Of_Origin",43.0],UNIT["Meter",1.0]]

All systems — France

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.