r.external - was: Re: [GRASS-dev] some questions about future development

[Markus Neteler]

On Thu, Aug 21, 2008 at 11:00 AM, Glynn Clements
<glynn at gclements.plus.com> wrote:
> Markus Neteler wrote:
>
>> >> Null support is missing (r.external records any null value reported by
>> >> GDAL, but G_get_raster_row() etc ignore it; I suspect that it will
>> >> treat zero as null due to the absence of a null file).
>> >
>> > Null support has been added.
>>
>> I have now tested (in my local 6.4 backport) a shaded terrain map (GeoTIFF).
>> The 0 pixels are registered as NULL pixels, leading to white areas instead
>> of black in case of cast terrain shadow.
>>
>> So I confirm that zero is treated as NULL now.
>> Could the GDAL Null value be used instead?
>
> Null support was added in r32924, and seems to work.

Ha - I missed to backport this one.

Excellent, it now works fine in my local backport, too.

So: any objections to submit this new feature/module?

Markus