[GRASSLIST:9857] GeoTiffs shifted by 360 degrees after processing in GRASS

[Gross, Dorit (SDRN)]

Dear all,

I have a set of GeoTiffs that I import into GRASS to do some processing and
export them afterwards as GeoTiffs again. The problem now is that GRASS
exports the images shifted by 360 degrees to the east.


Corner Coordinates (before the import into GRASS):
Upper Left  (-180.0044643,  75.0044643) (180d 0'16.07"W, 75d 0'16.07"N)
Lower Left  (-180.0044643, -56.0044643) (180d 0'16.07"W, 56d 0'16.07"S)
Upper Right ( 179.9955353,  75.0044643) (179d59'43.93"E, 75d 0'16.07"N)
Lower Right ( 179.9955353, -56.0044643) (179d59'43.93"E, 56d 0'16.07"S)
Center      (  -0.0044645,   9.5000000) (  0d 0'16.07"W,  9d30'0.00"N)

Corner Coordinates (after the export from GRASS):
Upper Left  ( 179.9955357,  75.0044643) (179d59'43.93"E, 75d 0'16.07"N)
Lower Left  ( 179.9955357, -56.0044643) (179d59'43.93"E, 56d 0'16.07"S)
Upper Right (     539.996,      75.004) (539d59'43.93"E, 75d 0'16.07"N)
Lower Right (     539.996,     -56.004) (539d59'43.93"E, 56d 0'16.07"S)
Center      (     359.996,       9.500) (359d59'43.93"E,  9d30'0.00"N)


Has someone of you faced a similar problem? How do I receive a proper
georeference when exporting from GRASS?

The input GeoTiffs are a set of converted Spot-Veg HDF files using GDAL. The
-180.0044... degrees for the upper left X seems a bit odd, but GDAL imports
the Spot-Veg properly with these coordinates. I checked the images in Erdas
and they are correct. I also checked the corner coordinates of the imported
file insight GRASS and also here the coordinates are correct. So apparently
the shift occurs during the export from GRASS into GeoTiff. At the moment I
solve the problem by reassigning the georeference to the GeoTiff after the
export from GRASS, but I would be more happy with properly exported images
right away.

Can someone help please?

Thank you,
Dorit

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/grass-user/attachments/20060116/ab499132/attachment.html