I would say that Global Mapper is probably an app you'd like to check out.
Code:
http://www.globalmapper.com/
Not sure if it does everything you want but it's one of the best.
Hope this helps :)
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Don't walk in front of me because I may not follow, don't walk behind me because I may not lead, but walk beside me and be my friend.
__________________
Don't walk in front of me because I may not follow, don't walk behind me because I may not lead, but walk beside me and be my friend.
I cannot view that thread yet but,
What I would do if I really wanted to do this, use google maps to screenshot a terrain area and than make your own displacement map?
Also the software, crazybump makes a normalmap for you and a bumpmap so maybe you can use that?