[GRASS-user] increase performance of r.neighbors

[Markus Metz]

On Fri, May 26, 2017 at 5:04 PM, Giuseppe Amatulli <
giuseppe.amatulli at gmail.com> wrote:
>
>
> Hi all,
> I'm running  r.neighbors for a global 250m raster with window-size
setting larger than 100 pixels.
> The computation take almost 1 week and i'm thinking if there is a way to
speed up the process.
>
> I know how to set-up a multi-region & multi-core computation and working
in tiles but I would avoid due to the difference that I would encounter in
the tile borders (and tile overlap will be required).

Tiling would speed up the process. What is the problem with overlapping
tiles? You can set up overlapping tiles, cut the results such that they are
not overlapping each other and patch them in the end.

Markus M

>
> Is it possible to run  r.neighbors in parallel or increase the memory
that r.neighbors  would use (as developed in r.watershed)?
>
> Thank you
> Best
> Giuseppe
>
>
>
>
> --
> Giuseppe Amatulli, Ph.D.
>
> Research scientist at
> Yale School of Forestry & Environmental Studies
> Yale Center for Research Computing
> Center for Science and Social Science Information
> New Haven, 06511
> Teaching: http://spatial-ecology.org
> Work:  https://environment.yale.edu/profile/giuseppe-amatulli/
>
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