Click here to see the SAS code.
Click here to see the example.

This is a variation of the very first wafermap I created, many years ago :)

The technique is similar to a GMAP wafermap.
I used gmap, and 4 x/y coordinated per each cell.

Scroll down, and you'll see that there are 3 different versions, using
a gmap "prism", "choro", and "block" maps.

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