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DEM data is extracted from the ASTER GDEM data set. 
It can be distributed since it respect one of the following conditions:
1) Paper materials on which the image produced from GDEM is printed 
2) Re-projected images involving re-sampling 
3) Data whose format is transformed so that the data can not be converted back to the original data 
4) Value-added product (e.g., flyby movie)

ASTER GDEM
Copyright (c) 2009 - 2014 Japan Space Systems(J-spacesystems) All Rights Reserved.

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Picture data comes from the Library of Congress, Prints and Photographs Division Washington, D.C. 20540 USA(http://www.loc.gov/pictures/collection/pgz/item/2001703294/).
No restrictions on reproduction are specified.
