[GRASS-user] rastization failed : can't allocate memory

[Daniel Victoria]

I never realized there was a rows parameter. oops

The message is understandable but I was thinking more in terms of the users
who have set the resolution too high without realizing, or using wrong
setting in the beginning. So maybe, add:
adjust 'rows' parameter or check region resoluiton with g.region



On Sat, Sep 6, 2014 at 1:24 PM, Markus Neteler <neteler at osgeo.org> wrote:

> On Sat, Sep 6, 2014 at 12:32 PM, Daniel Victoria
> <daniel.victoria at gmail.com> wrote:
> > Maybe, instead of throwing a memory error, grass could check the region
> size
> > and if the number of cells is too high, ask for user confirmation or
> suggest
> > how the user can change the region.
>
> I have for now added a message:
>
> # test case:
> GRASS 7.1.svn (nc_spm_08_grass7):~ > g.region vect=zipcodes_wake res=5 -pa
> projection: 99 (Lambert Conformal Conic)
> zone:       0
> datum:      nad83
> ellipsoid:  a=6378137 es=0.006694380022900787
> north:      258110
> south:      196320
> west:       610040
> east:       677070
> nsres:      5
> ewres:      5
> rows:       12358
> cols:       13406
> cells:      165671348
>
> # new message about RAM added:
> GRASS 7.1.svn (nc_spm_08_grass7):~ > v.to.rast zipcodes_wake
> out=zipcodes_wake_area use=attr attrcol=SHAPE_Area --o
> Using at least 0.4 GB of RAM (adjust with 'rows' parameter)
> Pass 1 of 4:
> Reading areas...
> [...]
>
>
>
> # other test case:
> GRASS 7.1.svn (nc_spm_08_grass7):~ > g.region vect=zipcodes_wake res=1 -pa
> projection: 99 (Lambert Conformal Conic)
> ...
> rows:       61780
> cols:       67020
> cells:      4140495600
>
> GRASS 7.1.svn (nc_spm_08_grass7):~ > v.to.rast zipcodes_wake
> out=zipcodes_wake_area use=attr attrcol=SHAPE_Area --o rows=10000
> Using at least 4.6 GB of RAM (adjust with 'rows' parameter)
> ...
>
> Is that new message understandable?
>
> Markus
>
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