[GRASS-dev] Implementing MrVBF in GRASS

Markus Neteler neteler at osgeo.org
Thu Dec 13 11:59:14 PST 2012


On Tue, Dec 11, 2012 at 4:39 AM, Pierre Roudier
<pierre.roudier at gmail.com> wrote:
> Greetings, devs,
>
> A popular covariate in the digital soil mapping community is the
> multiresolution valley bottom flatness (MrVBF) index, proposed by John
> Gallnd in 2003 [0]. While an open-source implementation is available
> in SAGA-GIS [1], I would like to be able to produce this in my
> favourite GIS environment.
>
> As I was getting started using pygrass, I realised that Python may be
> a bit slow for that sort of operations.

.. I cannot judge this but I wonder if numpy etc won't be almost as fast
as C here?

Markus


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