Hi,
I'm using r.out.png in GRASS 7 in it works well at least for values 0-255.
It also exports NULLs as transparent pixels which is great.
If you still have an issues with r.out.gdal you may want to consider
providing some small sample of your data and/or report this as a bug.
Vaclav
On Wed, Nov 6, 2013 at 8:42 AM, Cesar Augusto Ramírez Franco <
caesar...@gmail.com> wrote:
> Use the PNG driver:
>
> export GRASS_TRUECOLOR=TRUE
> d.mon start=PNG
> d.rast {mapname}
> d.vect {mapname}
> d.mon stop=PNG
>
> Then you'll have a map.png file on the current directory, and you can use
> imagemagic 'convert' utility to get a *.jpg
>
> convert map.png {mapname}.jpg
>
> Regards
>
>
> 2013/11/5 António Rocha
>
>> Dear all,
>> I have a Raster layer with colors and values 1 till 8 and null values. I
>> want to export as JPEG using r.out.gdal but I get a totally black image.
>> Any tips on how to solve this?
>> Regards,
>> Antonio
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>
>
>
> --
> *César Augusto Ramírez Franco*
> Laboratorio de Sistemas Complejos Naturales
> Escuela de Geociencias
> Facultad de Ciencias
> Universidad Nacional de Colombia - Sede Medellín
> Teléfono: (57-4) 430 9369 - 301 389 5607
>
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