This Treemap was created using SAS/Graph proc gmap, and
a custom map data set created using some macros I wrote.
Click here to see details on how the macros work.

Click here to see the SAS code that calls the macros (
Click here to see the example.

I guess the "neat" thing about this example is that I read the data directly 
from the Internet, using the relatively new SAS "filename url".

Here is where I read the data:
AAA Gasoline Prices
Census Population Data


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