[GRASS-user] r.contour contour wrap

[Markus Metz]

On Tue, May 1, 2018 at 9:57 PM, Markus Metz <markus.metz.giswork at gmail.com>
wrote:
>
>
>
> On Tue, May 1, 2018 at 4:20 PM, Heidi Ochis <hiho at ctmap.com> wrote:
> >
> > Using a USGS 10 meter NED elevation model, r.contour in versions 5, 64
and 72 create contours that trace back on themselves anytime the contour
exits the grid.  Islands are the only lines that do not create a line with
duplicate points.
>
> I can not reproduce these duplicate points with GRASS 72 and
elev_state_500m of the North Carolina sample dataset. Can you provide an
example with the exact dataset and the GRASS commands you used? This would
help to reproduce and fix the problem.

Thanks for providing test data! There was indeed a bug in r.contour, fixed
in trunk r72668. Is it OK to backport the bugix to GRASS 7.4 and 7.2?

Markus M

>
> Markus M
> >
> >
> > How do I resolve this?
> >
> >
> > Thank you,
> >
> >
> > Heidi Ochis
> >
> > --
> > Computer Terrain Mapping, Inc
> > 420 21st Ave, Suite 114
> > Longmont, CO 80501
> > 303-444-1670
> > hiho at ctmap.com
> >
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>
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