[GRASS-user] g_malloc on r.watershed with 30GB free ram + r.fill.dir crash

[mael]

I tried to set the resolution with 'res=30 ', also tried with 'align', r.watershed finishes without a problem if I add the -m flag but the script keeps crashing at r.fills.dir.

De : Markus Neteler [via OSGeo.org] [mailto:ml-node+s1560n5223843h44 at n6.nabble.com]
Envoyé : vendredi 11 septembre 2015 13:23
À : MORENI Mael
Objet : Re: g_malloc on r.watershed with 30GB free ram + r.fill.dir crash

On Fri, Sep 11, 2015 at 5:22 PM, Helmut Kudrnovsky <[hidden email]</user/SendEmail.jtp?type=node&node=5223843&i=0>> wrote:

>
> > I define the computational area with 'g.region raster=dem zoom=dem' ('dem'
> being my raster) before launching the script so it should match the
> elevation map.
>
> try
>
> g.region -a raster=elevation align=elevation
>
> to match and align your dem
>
> https://grass.osgeo.org/grass70/manuals/g.region.html
>
> -a    Align region to resolution
> align=name Adjust region cells to cleanly align with this raster map

consider to also add -p in order to actually see what you have there.

Ideally the resolution should match that of the map, also in order to
avoid non-square pixels as you report above
"
nsres:      30.00043309
ewres:      29.99901663
"

which are not ideal.

best
Markus
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