Hello No I don't know where my valid pixels are. Any alternative? 2012/10/25 Kyle Shannon <k...@pobox.com>
> Katrin, > Do you know where you valid pixels are in the image? If so, > gdal_translate with -srcwin would work: > > kyle@ubuntu:~$ gdal_translate -srcwin xoff yoff 60 100 in.tif out.tif > > where xoff, yoff are the number of pixels from the image origin that your > valid region begins(pixels, lines). See > http://gdal.org/gdal_translate.html for more info. > > > > On Thu, Oct 25, 2012 at 8:05 AM, katrin eggert <katrineggert1...@gmail.com > > wrote: > >> Greetings >> I have a Geotif with only one Layer with a size of 6000x5000 but from >> which I only have a square of 60x100 with bvalid pixels. the remaining are >> NOdata. The problem is that this Geotiff is a big file 90MB and without >> these NoData values I would have a much smaller raster. >> How can I generate a new Geotiff without these noValid values and with >> extent adjusted to the valid pixels? >> Thank you >> Regards, >> Katrin E. >> >> _______________________________________________ >> gdal-dev mailing list >> gdal-dev@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/gdal-dev >> > >
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