Thanks for the reply. Do you have any thoughts on how to get surfaceplotparm working with an irregular grid? Or, better yet, how to regularize the map data but still plot the map shape? My naive use of proc g3grid put made my map into a square . . .So while coloring the surface colorresponse might help me get close (e.g. create total z -axis as the sum of 3 variables and then color based on the percentage due to one of the variables . . . but how do i get the 3rd variable?), I can't figure out how to make it a map. As to the picture I'm trying to make 'surface plot' probably isn't a good word for what I have in my head (which I can't draw for you, because figuring out how to draw it would is where I got stuck). If we lsay the image I included (from proc gmap) is a series of line charts along each lattitude, where as the longitude changes the height of the line varies with the value of a variable, what i want is to fill the area between the line and the 0 height plane with 3 (transparent) color bands with the height of each band representing the value of one variable. Re-reading that, I'm pretty sure that doesn't make much more sense . . . Thanks again, TL P.S. -- in my head it's like the aurora borealis 'riboon' in this picture, but lined up on the map to show the geographic arrangement of the values of my 3 variables
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