[gdal-dev] Removing Nodata pixels from raster

[katrin eggert]

Hello
No I don't know where my valid pixels are.
Any alternative?

2012/10/25 Kyle Shannon <kyle at pobox.com>

> 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.html for 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.
>>
>> _______________________________________________
>> gdal-dev mailing list
>> gdal-dev at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/gdal-dev/attachments/20121025/7ba020e1/attachment.html>