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

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I got the long/lat data for the observatory locations from here 

I copy-n-pasted the data into an Excel spreadsheet, and I use SAS/Access to PCFF 
to import the spreadsheet into sas.

I then annotate the lat/long's as dots onto a SAS/Graph gmap.
I set up html href= drilldowns so you can click on the dots
and launch a google search to find more info on the observatories.

I annotate a clipart image of an observatory in the bottom/left
corner of the map.

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