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

As in several other examples, I use proc gproject's (longmax/longmin/latmax/latmin)
to create a custom map that 'chops' the borders to just show the region of interest,
and I also annotate long/lat gridlines.

I use the annotate 'pie' function to draw the circles.
I got the sas/graph developers to add a 'width' variable, to control the width
of the annotated pie circles (this feature will come out in v9.2 sas).

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