[GRASS-user] Viewsheds

Hamish hamish_nospam at yahoo.com
Tue Sep 26 22:48:32 EDT 2006

PA Light wrote:
> We are conducting some viewshed analyses at work. We have been using
> MF Works for this, but it appears as though it does not account for
> the curvature of the Earth. Before I recommend to my boss that we use
> GRASS for this, I wanted to confirm that r.los does, in fact, account
> for the Earth's curvature. Unfortunately, the online manpage makes no
> mention of it, so I was wondering if anyone can tell me if it does or
> doesn't.

I am not sure, but I doubt it will; I think you'll have to look through
the source code to get a real answer.

Do check out r.cva, as it's quite a bit better then r.los.

Also consider adding a curvature of the earth adaptation yourself!


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