[QGIS-Developer] Polygons disappearing bug

[Nyall Dawson]

On Thu, 8 Aug 2024 at 03:01, Tasha Anstey via QGIS-Developer
<qgis-developer at lists.osgeo.org> wrote:
>
> Hi,
>
> Myself and my business partner are daily users of QGIS, and we have notices recently that we have been having problems with polygons disappearing when splitting polygons or editing vertices. Sometimes a seemingly random number and distribution of polygons disappear from the layer being edited. The polygons still exist in the attribute layer but they have a NULL geometry and area. We haven't been able to recover them.

This kind of behaviour is generally a symptom of a corrupted spatial
index in a dataset. Depending on the format the fix will differ, but
you should try either re-creating just the spatial index or (better)
saving the problematic datasets to a new file so that the entire
dataset is re-written from scratch.

I'd also strongly suggest starting a new QGIS user profile and testing
without ANY plugins installed. Plugins are another common cause of
issues like this.

Nyall


>
> Kind regards,
>
> Tasha
>
> Tasha Anstey
> Ground Truth Forestry
> tasha at groundtruthforestry.com | 07553 790460
>
> _______________________________________________
> QGIS-Developer mailing list
> QGIS-Developer at lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer