[GRASS-user] Re: Values from multiple raster -

Gabriele N. gis.gn at libero.it
Tue Nov 23 17:28:37 EST 2010



Daniel Victoria wrote:
> 
> It's not r.mapcalc fault. I imagine it's probably a limitation due to
> the number of bits in your image.  For instance, 8 bit images can have
> up to 256 values. 16 bit images can have 65,535. So, if you have too
> many values, you will have problems. Not sure how to avoid this in
> your case but, maybe you will need to work with categories after all.
> Are you planing on doing any math operations in the concatenated
> values or is it more for displaying pourposes?
> 
Hi Daniel...

Maybe it would be useful only concatenation but I would also have the
possibility to apply tools such as r.statistics and other similar that work
on the value of cells.

Gabriele
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