[gdal-dev] Removing Nodata pixels from raster

[Kyle Shannon]

Katrin,
Do you know where you valid pixels are in the image?  If so, gdal_translate
with -srcwin would work:

kyle at 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.htmlfor more info.



On Thu, Oct 25, 2012 at 8:05 AM, katrin eggert
<katrineggert1980 at 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.
>
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