[Qgis-developer] gdalwarp fails, Save as... reprojected works

[Even Rouault]

Le dimanche 09 octobre 2016 23:27:04, Victor Olaya a écrit :
> If the parameter is not needed, it should be optional.
> 
> If anyone can confirm that, I will make it optional.

From the doc http://gdal.org/gdalwarp.html, the only required parameters are 
the input and output files :-)

> 
> Cheers
> 
> 2016-10-09 23:05 GMT+02:00 Giovanni Manghi <giovanni.manghi at gmail.com>:
> >> Hi all,
> >> reprojecting a raster from 4326 to 3857 through Save as... menu works,
> >> whereas the same through Processing does not:
> >> 
> >> gdalwarp -ot Float32 -t_srs EPSG:3857 -r near -of GTiff -te -20.0 40.0
> >> 20.0 90.0 -te_srs EPSG:4326 -co COMPRESS=DEFLATE -co PREDICTOR=1 -co
> >> ZLEVEL=6 -wo OPTIMIZE_SIZE=TRUE gt30w020n90.dem OUTPUT.tif
> >> GDAL command output:
> >> ERROR 1: tolerance condition error
> >> ERROR 1: -te_srs ignored since coordinate transformation failed.
> >> 
> >> With GDALTools it works. The CL in this case is:
> >> 
> >> gdalwarp -overwrite -s_srs EPSG:4326 -t_srs EPSG:3857 -of GTiff
> >> gt30w020n90.dem test_repro.tif
> >> 
> >> So apparently Processing introduces unnecessary, damaging, params.
> > 
> > I assume that your input is
> > 
> > http://svn.simo-project.org/tools/trunk/txt2latlon/data/
> > 
> > A quick test from the cli would have shown you that the issue is in
> > 
> > "20.0 40.0 20.0 90.0"
> > 
> > for the "-te" parameter. If a smaller extent is defined the
> > tool/command works (in fact the exact extent of the raster is not that
> > one). Leaving the extent automatically defined/computed by Processing
> > does not seems to be an issue for the majority of inputs.
> > 
> > Regarding this tool my question is another: why the "te_srs" parameter
> > (and by consequence also "te") has been made mandatory?
> > 
> > -- G --
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