Im not sure if this will be of any use!
My MSc dissertation in GIS applied the use of Kohonen Self Organising Maps
(SOM) in mapping the historical form of sand dunes. At the same time this
SOM technique was applied by a fellow student in the analysis of channel
form for the mississippi river, the output visualised as a series of 3-
dimensional star diagrams developed in VRML. I assume that it would be
possible to modify this technique to generalise and map valley form,
grouping similar shapes.
Regards
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