[GRASS-user] r.horizon and negative tilt

[Frank David]

Hello Markus,

is it possible to add an option to evaluate the negatives hight in a
future release ? (I don't know C)

Best regards,
Frank
Le 30/07/2018 à 16:19, Markus Metz a écrit :
>
>
> On Sat, Jul 28, 2018 at 3:59 PM, Frank David <frank.david at geophom.fr
> <mailto:frank.david at geophom.fr>> wrote:
> >
> > 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...
>
> r.horizon is indeed ignoring points that are lower than the given
> point, see
> https://trac.osgeo.org/grass/browser/grass/trunk/raster/r.horizon/main.c#L1037
> and following lines
>
> I agree that this behaviour is questionable
>
> Markus M
>
> >
> > Thank you for your explanations
> >
> > Regards
> >
> > Frank
> >
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>

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