[GRASS-user] curve sketching

[Martin Wegmann]

Hello, 

I am looking for a function related to "curve sketching" (Kurvendiskussion in 
german) - I think r.series would be the perfect place for it, but before 
submitting a wish, I just wanted to ask if there already exists a module 
which fullfills this task.

If would be very handy to have functions like:

- point of global maximum (already in r.series -> max_raster)
- point of global minimum (already in r.series -> min_raster)
- turning point  (Wendepunkt)
- point of max./min. slope (e.g. growing season, senescence)
- information about unimodal/bimodal etc. phenology (no idea how to add this)

Some functions are listed on the german Wikipedia (1) - the eng. pendant is 
not as elaborated (2)

Martin


(1) http://de.wikipedia.org/wiki/Kurvendiskussion
(2) http://en.wikipedia.org/wiki/Curve_sketching