[gdal-dev] Trouble with French Ecw map

[Nicolas Ragg]

Hello all

I have a french map in ECW format, i guess it is from IGN. Srs seems ok but when i import
the thing in qgis or try to warp the file it is all shifted to north (Around
Sweden).

The output from gdalinfo 1.11 is
PROJ.4 : '+proj=lcc +lat_1=46.8 +lat_0=46.8 +lon_0=0 +k_0=0.99987742
+x_0=600000 +y_0=200000 +a=6378249.2 +b=6356515 +to
wgs84=-168,-60,320,0,0,0,0 +pm=paris +units=m +no_defs '

OGC WKT :
PROJCS["NTF (Paris) / Centre France (deprecated)",
     GEOGCS["NTF (Paris)",
         DATUM["Nouvelle_Triangulation_Francaise_Paris",
             SPHEROID["Clarke 1880 (IGN)",6378249.2,293.4660212936265,
                 AUTHORITY["EPSG","7011"]],
             TOWGS84[-168,-60,320,0,0,0,0],
             AUTHORITY["EPSG","6807"]],
         PRIMEM["Paris",2.33722917,
             AUTHORITY["EPSG","8903"]],
         UNIT["grad",0.01570796326794897,
             AUTHORITY["EPSG","9105"]],
         AUTHORITY["EPSG","4807"]],
     PROJECTION["Lambert_Conformal_Conic_1SP"],
     PARAMETER["latitude_of_origin",52],
     PARAMETER["central_meridian",0],
     PARAMETER["scale_factor",0.99987742],
     PARAMETER["false_easting",600000],
     PARAMETER["false_northing",200000],
     UNIT["metre",1,
         AUTHORITY["EPSG","9001"]],
     AXIS["X",EAST],
     AXIS["Y",NORTH],
     AUTHORITY["EPSG","27592"]]

if i use this proj4 (from another map) (+proj=lcc +lat_1=45.89891888888889
+lat_2=47.69601444444444 +lat_0=46.8 +lon_0=2.337229169999754 +x_0=600000
+y_0=2200000 +a=6378249.2 +b=6356515.000000472 +units=m +no_defs)
it is somehow better.
I didn't have this problem with the previous gdal version we used, but it's an old one , 1.7.2 used in Nasa Worldwind.
so now, what can i say, is there something wrong with my source file? do i have to provide gdal with clue to how interpret this srs?
Is there an issue with old ECW plugin?

Regards

Nicolas