Mike Liebhold wrote:
I wonder how much of watershed boundries could be generated algorithmically along topographic ridges and high points. If you don't mind, I am cross-post this to the geowanking list of GIS hackers, who will definitely have some great ideas on how to do this - technically.

This talk might be of interest:

http://www.foss4g2007.org/presentations/view.php/114

I don't know if Martin is following these lists, but he's around somewhere :)

Jason
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