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

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In this example, I write a macro so I can easily loop through all 
the airports, and do a map for each airport (which I store in a 
maps subdirectory)  I annotate markers on each airline, and annotate
a line between the selected airport & the airports it has flights 
departing to, and draw a line (color-coding the line based on the
% of flights that are delayed).

Each airport has an html drilldown (href=) so you can click on 
the airports to bring up their map.  Since all the maps are 
generated ahead of time, this application provides *very* fast 
response time for the end-users!

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