[GRASS-user] r.mapcalc concatenates values?

[Milton Cezar Ribeiro]

Hi Gabriele,
After you use r.cross (I follow Christian´s suggestion on it), if you need
to do some computation with the new generated raster map, you can use
r.stats to generate a ascii output. After I even use R to haldle the tabular
data.

Cheers,

miltinho astronauta
brazil

2008/9/9 Christian Schwartze <Christian.Schwartze at uni-jena.de>

> If I unterstood you right, maybe r.cross is useful...
>
> Regards,
> Christian.
>
>
> Zitat von "Gabriele N." <gis.gn at libero.it>:
>
> >
> > Hi everyone.
> >
> > I have two questions
> >
> > 1)
> > I have some raster (with the same format and are converted from vector).
> The
> > cells have the value of CAT. So the value = CAT
> > With r.mapcalc I would define a map of output that I give, as the value
> for
> > each cell, indications of the different CAT. For example, if I have the
> > raster A that has value = 1 and raster B that has value = 2, I will have
> > raster C output value = 1,2
> > If I have 3 maps in input, value = 1,2,3 etc. ...
> > I made several attempts but I do not know if r.mapcalc concatenates the
> > values.
> >
> > 2)
> > if r.mapcalc is not possible, I tried to make the transition to vector.
> The
> > passages that I made are:
> >   - r.to.vect maps raster input (es rasterA and rasterB)
> >   - V.overlay and I get in dbf, in a column the value of rasterA and in
> > another column the value of rasterB. I've created a third column to
> > concatenate the 2 columns but it seems to me that the operator '| |' does
> > not work with dbf.
> > How do I concatenate the values in 2 columns?
> >
> > Thank you very much
> > Gabriele
> > --
> > View this message in context:
> >
> http://www.nabble.com/r.mapcalc-concatenates-values--tp19392795p19392795.html
> > Sent from the Grass - Users mailing list archive at Nabble.com.
> >
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