Hi,
I would like to know how to extract a valley feature from a DEM as a
polygon : the wanted result isn't equal to a watershed or a sub-basin,
it is the cumulated shape of the two slopes and the bottom where the
stream is located.
As I do not master the geomorphological vocabulary, here is a image
showing the desired outcome :
https://drive.google.com/open?id=0B1sJg8zddqSPUk9BcTdncVRNNHc
I'm using GRASS7, I've tried r.watershed and several r.stream.* modules
but my lack of knowledge in this domain is blocking. The elevation data
used is the EU-DEM.
Regards,
Jean-Roc
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