[GRASS-user] r.horizon and negative tilt

[balotti.and at gmail.com]

Hi Frank,
just my opinion but r.horizon I suppose is targeted to solar radiation 
modules and because of that returns only the line-of-sight "obstacles" 
above the ground plane, where direct sunlight may be obstructed by 
obstacles.
best regards,

Andrea Balotti

Il 28/07/2018 15:59, Frank David ha scritto:
> Dear all,
>
> It seems that r.horizon in does not return negative heights. How it's 
> possible in case of the given point from the calculation is done is 
> located on mountain and the horizon around is below zero ??. I miss 
> something may be...
>
> Thank you for your explanations
>
> Regards
>
> Frank
>
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