[GRASS-user] bug?: v.to.db wrong area

Markus Metz markus.metz.giswork at googlemail.com
Mon Dec 7 12:16:52 EST 2009


Achim Kisseler wrote:
> Hi,
>
> I am using
>
> v.to.db map=af_grid option=area columns=area type=centroid units=kilometers
>   
try units=hectares, kilometers are not an areal unit, don't know why 
v.to.db executes at all

you can cross-check the results by querying the map

hope that helps,

Markus M

> (in GRASS65 opensuse 11.1 64)
>
> to calculate the area size. Some of the areas are very wrong. Its a grid
> in lat-lon, where areas should be nearly equal in size.
>
> Is this a known bug? I don't guess so.
> Do I something wrong?
>
> Thanks,
> Achim
>
> PS:
> already did v.clean, r.mask -r (<- should not be have an effect)
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