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

[ivan marchesini]

thanks Hamish..
I'll take a look to your suggestions...
:-)

Ivan


Il giorno ven, 06/02/2009 alle 17.04 -0800, Hamish ha scritto:
> 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
> 
> 
> 
>       
> 
> 
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Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a 
06125
Perugia (Italy)
Socio fondatore GFOSS "Geospatial Free and Open Source Software" http://www.gfoss.it
e-mail: marchesini at unipg.it
        ivan.marchesini at gmail.com
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