[Qgis-user] How do I clean up this geometry?

Charles Dixon-Paver charles at kartoza.com
Sat Jan 9 05:32:57 PST 2021


I tried cleaning this up with the v.clean grass tool and the snap function,
but there still seems to be issues with some of the geometries. I even
tried a "Buffer by 0" with v.buffer but something is still amiss. If anyone
has a way to "hard reset" area geometries I'd be very interested to know.

On Sat, 9 Jan 2021 at 09:37, Phil Wyatt <phil at wyatt-family.com> wrote:

> I spotted at least one other anomaly
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> Bottom left of this object has a long sliver that you might want to remove
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> Cheers
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> *From:* Qgis-user <qgis-user-bounces at lists.osgeo.org> *On Behalf Of *
> qgis-user at stripfamily.net
> *Sent:* Saturday, 9 January 2021 7:28 AM
> *To:* qgis-user <qgis-user at lists.osgeo.org>
> *Subject:* [Qgis-user] How do I clean up this geometry?
>
>
>
> This linked
> <https://drive.google.com/file/d/1o1KthonUPSZGWp6QImS9btbj799Lv-om/view?usp=sharing>
> file, proclaimed.zip, is the boundary of the Santa Fe National Forest as
> supplied by the USFS.
> If you focus on this area
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> There is some problematic geometry. If I do a dissolve I get this:
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> If I remove the holes, I'm left with this bit of stray boundary:
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> I then remove that with edit nodes. But the resulting polygon is still not
> clean  - if I try to use the field calculator to add the area (using
> $area), I get
> *null.*There is bad geometry that I'm not spotting, but how do I find it?
>
>
> The second linked
> <https://drive.google.com/file/d/1ul60p0rSdwKcmt6zUivSMIPQHXYc_rcT/view?usp=sharing>file,
> clean.zip, is the result of the steps above.
>
>
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