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

In this example, I create a custom sas/graph map data set,
where each 'dot' is a separate area in the map.  For each
dot, I run through a 'do loop' in a data step, and calculate
the x/y coordinates along the outer edge of the circle, and
output them into the data set for that dot's id#.

I then use sas/graph "proc gmap" to draw the map containing
these circular map areas.  I provide some data that has id#'s
that coorespond to the id's used for the circles in the map,
and I color the circular areas based on some variable in the
data (in this case the variable is named 'value'). 

I use gmap's "html=" option to specify html title= charttips/
flyover-text, to show lots of info about each circle in the 
map when you mouse over it (you must use the Internet Explorer
web browser to see the chart tips).

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