cat file for r.mapcalc

Xin Zhuang zhuang at
Fri Oct 13 16:46:30 EDT 1995

I have two layers: left and right. They don't overlay.
I'd like to merge them together. Guess I can use
	new = left + right
or more safely

However, there won't be category contents for Layer "new".
Is there a way to bring category contents in Layers "left"
and "right" into Layer "new"?
Or maybe I should use another function?

Appreciate any hint and help.

zhuang at

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