Andreas Joisten wrote:
Hi Jean-Claude,

many thanks for your answer.

As you can see I did not specifiy the ellipsoid parameter:

gdalwarp -s_srs EPSG:27700 -t_srs EPSG:4326 input_geotiff_in_BNG.tiff  
output_geotiff.tiff


the gdal error message was:
ERROR 6: Failed to initialize PROJ.4 with `+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.
9996012717 +x_0=400000 +y_0=-100000 +ellps=airy +datum=OSGB36 +units=m 
+no_defs'.
unknown elliptical parameter name


Is that a bug in GDAL?

Andreas,

Yes, I would say it is. Could you please file a ticket on this?

Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, [email protected]
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent

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