I received two files  - one is a .img and the other is a .ddr file and was wondering 
if anyone has any experience using these file types.  Particularly - are these DEMs or 
are them some other type of elevation data and what is the best program to view these 
files in?

Thanks for any help in advance.

Christian McNierney

Spatial Insights, Inc.
A Geographic Information Services Company
Providing innovative mapping solutions, software, and data products to businesses 
worldwide
7635 Leesburg Pike
Falls Church, VA 22043-2520
Direct: 703-891-1009
Fax: 703-891-1007
Main Line: 703-891-1010
Sales: 800-347-5291
Cell: 703-915-8216
www.spatialinsights.com 



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