[gdal-dev] gdalwarp rather than gdal_translate

[Diana Esch-Mosher]

I looked at gdalwarp and I see where it checks to see if the destination 
file exists, if so then it reads the TargetSRS from that dataset. So I 
should pre-create to the target size that I am requesting in gdalwarp? I 
have no problem in python  pre-creating the file, copying the metadata, 
geotransform, and projection data ... anything else I should copy? Then 
I just call gdalwarp as gdalwarp -rcs -ts x y -of  NITF (or any other 
-of  I want).

Diana

Frank Warmerdam wrote:
> Diana Esch-Mosher wrote:
>> I have a NITF file that I would like to resample using the more 
>> sophisticated interpolation techniques of gdalwarp (-rcs). I do not 
>> want the file to change in way other than size, I do not want to 
>> transform/reproject/warp etc. When I specified gdalwarp -rcs -ts x y 
>> -of GTiff it transformed the file in a North up. How do I specify to 
>> not do anything other than resample? 
>
> Diana,
>
> Currently gdalwarp does not support producing output files with 
> georeferencing
> based on a GCPs.  You can write a file with a non-north up 
> geotransform but
> only by pre-creating the file replicating the input geotransform which 
> is not
> really practical from the commandline.
>
> > Is it possible to specify -of NITF? I
>> tried this using 114 and got errors. Do I need 115 for NITF?
>
> gdalwarp should support creating NITF files.
>
> When you refer to 114 and 115 are you meaning GDAL/OGR 1.1.4 and 1.1.5?
> Those are ancient!
>
> Best regards,