Hello Even,
On 07/08/15 21:16, Even Rouault wrote:
Homme,
>
>> Band 1 Block=256x256 Type=Float32, ColorInterp=Gray
>> NoData Value=nan
>>
>> All files are available at <http://dropcanvas.com/yazx9>.
>
> Fixed by https://trac.osgeo.org/gdal/ticket/6066
> The issue was that gdaldem didn't have the needed code to correctly
deal with
> nan as the nodata value.
That's fantastic, many thanks. I've tested it and the output looks great.
Those pesky nans again...
>> I find that the NODATA values are assigned the maximum colour value in
>> dhaka-colour-relief.tif i.e. RGBA 0 1 36 255.
>>
>> Changing the NODATA to -1 using `gdal_translate -a_nodata -1` does not
>> seem to affect this outcome. I have tested this using both GDAL 1.11.2
>> and a recent trunk build on Linux.
>
> That only changes the nodata *metadata* value, not the actual pixels.
For that
> you could do "gdalwarp -dstnodata -1" instead.
Thanks, and I note it is well documented in the manual.
Homme.
Even
>
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