In reply to John Berglund.

Hi John,
Thank you for your feedback. I am not sure if there is a SAS data set that has elevations of individual addresses, but there is a data set MAPSGFK.USCITY that has the altitude of cities. Take a look at this Alternate U.S. City Lookup Data. This data set MAPSGFK.USCITY is provided with SAS/GRAPH and it has 150,000+ US cities listed with their latitude, longitude as well as Altitude in meters (ALT_M) and Altitude in feet (ALT_FT) variables. Hope this helps.
Best regards,
Leonid