[postgis-users] Editing Topology with QGIs, nno more precision issues

Sandro Santilli strk at keybit.net
Tue Aug 5 11:17:22 PDT 2014

On Tue, Aug 05, 2014 at 08:04:55PM +0200, Rémi Cura wrote:
> Hey,
> I noticed that QGIs is introducing slight errors when editing topology
> edge_data layer (with the regular edition, no pluggin ).
> This is dangerous because function such a s ST_getFaceGeometry won't work
> afterward (in some case).

Are you aware of the QGIS built-in snapping support ?
 Settings -> Options -> Digitizing
 Settings -> Snapping options 

The controlled way to edit edges would be via ST_ChangeEdgeGeom, which
ensures topology is also preserved (something that would need to be
added to the topological editing toolbox...)


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