collection of soil profile summaries from the Sierra Field Station, near Marrysville, CA.

4-class terrain grouping.

3-class terrain groupings

Flow accumulation and solar radiation; convergence=5 -- PAM unsupervised classification.

Flow accumulation and solar radiation; convergence=1-- PAM unsupervised classification.

 
Updates

Updated flow accumulation from r.watershed using MFD, convergence=1.

Background and Justification

Optimal Route in 3D

 
Premise:
Several data-loggers in steep terrain; how can we visit all of them in the most efficient manner such that we traverse the least cumulative slope gradient? In a sense this is a traveling salesman style problem, with travel costs defined by slope gradient. The v.net.salesman module in GRASS can be used to compute the optimal route between data-loggers, given: 1) a network of lines connecting all points to be visited and 2) transferal of slope cost information to the network. An example approach is listed below. Note that due to a bug in v.net.salesman, we need to use one extra step-- details below.