In SAGA GIS there is a "Crop to Data" module (in Grid Tools module
library), which performs the task.
But this would require you to import your Geotif with the GDAL import
module, process it in SAGA, and finally export it as Geotif again with
the GDAL export module.
Best regards,
Volker
On 10/25/2012 05:32 PM, katrin eggert wrote:
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.
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