Hi, I am curious as to how the r.los module computes it's visibility exactly. I dug in the code a little bit, but I found it to be hard to read, so I am asking on this mailing list.
I know that r.viewshed is going to compute visibility using gradients (given a point q and a viewpoint v, q is visible if the gradient from q-to-v is the maximum of all point's gradients on the way to v from q), but that doesn't seem to be the case for r.los. Is there a quick simple explanation of how it works? It's not in the documentation... thanks a lot! Julien-Charles Lévesque
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