[GRASS-user] raster map of the azimuth to a point

[Hamish]

ivan marchesini wrote:
> I have a single point vector map.
> 
> I would like to obtain a raster map where each cell represents the value
> of the azimuth to the point raster map.
> I mean I would like to know which direction someone have to look to see
> the point in the vector map.
> 
> any suggestion?

many years ago I locally modified r.los to output azimuth angle instead of
elevation angle. If you search the mailing list archives you might find a
link to the code.

screenshot:
 http://bambi.otago.ac.nz/hamish/pics/milf_we_los-exp2.png

r.cva or r.viewshed addon modules might help too.


Hamish