overlay contour (netto)

Hallo NCL,

I have a question, how can i possibly create such an overlay contour from
two different fields, let's say:

X (contour: negative value= black, positive value= white)
Y (contour: negative value= black, positive value= white)

then do an "OVERLAY X slice Y". The result of overlay product from two
contour map will be:

if negative values + negative values == Black
if positive + negative == Black
if negative + positive == Black
if positive + positive === "WHITE"

X slice Y.

I really appreciate for your hints.

Xi

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Received on Wed Jul 24 03:25:05 2013