angle of view measurement

[Patricia Woodman]

Grass users

Can anyone pleas help

I am trying to calculate the viewing angle from each pixel in a map layer.
I thought I could do this using r.los, but now that I read through the
manual page properly I see that this doesn't sem to be possible. I
understand thst r.los gives the vertical angle needed to view each pixel,
instead of what I want, which is an measurement describing the angle of the
surrounding terrain visible from a particular point.

Does anyone know how I could do this, or this there a tool availble to do
this.
Surely someone must have come across this problem before.

Thanks in advance

Paddy

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Patricia (Paddy) Woodman                   Telephone (0734) 875123 ext 7310
Department of Archaeology                  Fax (0734) 318132
University of Reading                      Email larwodmn at reading.ac.uk
Whiteknights
PO Box 218
Reading RG6 2AA