I would add that by styling the polygons with a semi-transparent fill, inadvertent overlaps become quite visible.
Arni Árni Geirsson *Alta ehf* // +354 582 5000 // +354 897 9549 On 11 January 2017 at 08:47, Bernhard Ströbl <bernhard.stro...@jena.de> wrote: > Hi Bernd, > > QGIS can prevent gaps/intersections between polygons of the same layer, > you only have to switch on the options. IMHO QGIS should not always prevent > this because e.g. users may deliberately leave gaps. > > So how can you solve your problem? > 1) You could teach your users what the options mean and how to use them (I > regularly teach my users). > 2) You could further prepare a project for them where the snapping options > are enabled for the layers in question. If you are in PostGIS create a new > DB user that has full rights on these tables and load the layers with this > user account, revoke all editing rights from all other DB users. Thus your > QGIS users can only edit when they use your prepared project. Be aware that > QGIS stores username and password in the project file, but I would not see > a problem in this if your users are as dumb as you claim :-) > 3) If on PostGIS you could enable triggers on insert/update that does not > accept invalid polygons/overlaps between polygons. No way to prevent gaps > during editing; gaps must be identified end eliminated afterwards. > (4) I have never tried PostGIS' new topology. Maybe it is worth checking > it out. > > Bernhard > > Am 11.01.2017 um 09:24 schrieb Bernd Laskowski: > >> Hi Jürgen, what about dumbest assumable user <DAU> or lusers? >> >> Thanks a lot Harrissou >> but I know the standard options to use topological editing funktions. >> I have problems with foolish users. They forget to activat topological >> editing or snap-option and so on. >> We need a solution to prevent saving intersections or/and holes/gaps >> within qgis or postgis. >> >> Regards >> Bernd >> >> >> >> _______________________________________________ >> Qgis-user mailing list >> Qgis-user@lists.osgeo.org >> List info: http://lists.osgeo.org/mailman/listinfo/qgis-user >> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user >> >> > > > __________ Information from ESET Mail Security, version of virus signature > database 14749 (20170111) __________ > > The message was checked by ESET Mail Security. > http://www.eset.com > > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: http://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
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