raster overlay

Pat Luther pluther at usit.net
Wed Dec 4 14:26:49 EST 1996


The colors will change when adding layers together using r.mapclac.  This
is because the values of each layer are added together (where they overlay)
and this results in new & different values.  You are overlaying correctly.

Pat Luther

At 10:27 AM 12/3/96 +0000, you wrote:
>  I'd like to know how can I create a raster file by an overlay 
>between some other. I tried using r.mapcalc with "+" but the result had
>changed colors. 
>Thanks for help
>Alberto Giorgi
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