[Gdal-dev] Problem with MapInfo file and NTF system

[Jean-Claude Repetto]

Hello,

I have downloaded a vectorial map of France in MapInfo format (freely 
available from the IGN website at 
<http://www.ign.fr/telechargement/MPro/produit/GEOFLA_Dep/GEOFLA-dep-L2-MM.ZIP>
).

I am trying to convert it to WGS84 with ogr2ogr, but the result is 
wrong, the longitudes have an offset of 2.33° (corresponding to the 
Paris prime meridian).

The original file contains this definition of CS and projection :

CoordSys Earth Projection 3, 1002, "m", 0, 46.8, 45.898918964419, 
47.696014502038, 600000, 2200000 Bounds (-113967455.417, -
106367759.649) (115167455.417, 122767151.185)

Projection type 3 = Lambert Conformal Conic
Datum 1002 = datum name: Nouvelle Triangulation Francaise (NTF) Paris 
Prime Meridian
             Area: France
             Ellipsoid: Modified Clarke 1880

But ogrinfo gives that information :

Layer SRS WKT:
PROJCS["unnamed",
     GEOGCS["unnamed",
         DATUM["NTF_Paris_Meridian",
             SPHEROID["Clarke 1880 (modified for 
IGN)",6378249.2,293.4660213],
             TOWGS84[-168,-60,320,-0,-0,-0,0]],
         PRIMEM["Greenwich",0],
         UNIT["degree",0.0174532925199433]],
     PROJECTION["Lambert_Conformal_Conic_2SP"],
     PARAMETER["standard_parallel_1",45.898918964419],
     PARAMETER["standard_parallel_2",47.696014502038],
     PARAMETER["latitude_of_origin",46.8],
     PARAMETER["central_meridian",0],
     PARAMETER["false_easting",600000],
     PARAMETER["false_northing",2200000],
     UNIT["Meter",1]]

Shouldn't the central_meridian be equal to 2.33° ?
(I am using GDAL 1.3.2).

Regards,
Jean-Claude