[GRASS-user] r.mapcalc concatenates values?

[Christian Schwartze]

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
> --
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