[GRASS-user] Statistics for each area of a thematic map

[Odoardo Zecca]

v.rast.stats seems to be what I was looking for.
Thank you Jaroslaw.

Odoardo Zecca

On 2/16/07, Jarosław Jasiewicz <jarekj at amu.edu.pl> wrote:
>
> Odoardo Zecca napisał(a):
> > Hello all,
> > I've created a vector thematic map with a dozen of different areas
> > (different units in a viticultural zoning study).
> > For the same region, I've got a few rasters as well: DEM, slope and
> > aspect, annual precipitations, solar radiation, Winkler's index, ....
> >
> > What I need is an estimate of some statistics as min, max, mean values
> > of each variable (elevation, ...) for each particular region. What do
> > you suggest as the best method (for what concern speed and, above all,
> > quality of results) in order to accomplish this task?
> > I only can imagine this:
> >
> > 1) transform the vector map in raster
> > 2) use r.statistics (as in the example in the manual) or maybe
> > r.statistics applied to the rasters of climatic variables after
> > masking for each particular area.
> >
> > Is there some better way, in particular a way which doesn't involve
> > transforming  the vector map to raster?
> >
> > Thanks in advance.
> >
> > Odoardo Zecca
> >
> > Institut Agricole Régional
> > Regione La Rochère 1/A
> > 11100 Aosta
> > email: o.zecca at iaraosta.it <mailto:o.zecca at iaraosta.it>
> >
> >
> > ------------------------------------------------------------------------
> >
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> > grassuser at grass.itc.it
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> >
> what about v.rast.stats?
>
> Jarek
>
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