[GRASSLIST:3177] Re: Proper input for r.sunmask (GRASS5.3)

[Javier A. Yebrin]

> On Wed, Apr 14, 2004 at 03:53:31PM +0200, Javier A. Yebrin wrote:
> > Hi all!
> > I'm trying to use r.sunmask in order to calculate shadowed
> > areas.
> > [....]
> r.sunmask is just extremely slow.
>
> A trick: use r.sun instead:

Thanks, i'll try that later. I want to see first how does r.sunmask
performs. It's been running for 20 hours and its on 72%.
(Grass53 on AlphaStation 500 - 400Mhz -256 Mb RAM - 1 gb used swap)
Regards.
Javier


>
>  http://grass.itc.it/gdp/html_grass5/html/r.sun.html
>  - use -s flag
>  - "A map of shadows can be extracted from the solar incidence
>     angle map (incidout). Areas with zero values are shadowed."
>
> Hope this helps,
>
>  Markus
>
>