Thanks Daniel, so it's a question of interpretation of specs. Any opinions about multiple self intersections? All the best.
Il 14/02/2018 20:22, Daniel Baston ha scritto: > Hi Paolo, > > I've encountered differing opinions on the validity of repeated > vertices. The ticket linked below summarizes the "invalid" argument, and > includes a link to the "valid" argument: > https://trac.osgeo.org/postgis/ticket/3425 > > Dan > > > On Wed, Feb 14, 2018 at 2:17 PM, Paolo Cavallini <cavall...@faunalia.it > <mailto:cavall...@faunalia.it>> wrote: > > Hi all, > we noticed two strange things in the behaviour of ST_IsValid: > * repeated vertices are not considered invalid > * in case of multiple intersections on a same polygon, only the first > one is reported. > Is there an explanation for this? > Thanks. > -- > Paolo Cavallini - www.faunalia.eu <http://www.faunalia.eu> > QGIS & PostGIS courses: http://www.faunalia.eu/training.html > <http://www.faunalia.eu/training.html> > https://www.google.com/trends/explore?date=all&geo=IT&q=qgis,arcgis > <https://www.google.com/trends/explore?date=all&geo=IT&q=qgis,arcgis> > _______________________________________________ > postgis-users mailing list > postgis-users@lists.osgeo.org <mailto:postgis-users@lists.osgeo.org> > https://lists.osgeo.org/mailman/listinfo/postgis-users > <https://lists.osgeo.org/mailman/listinfo/postgis-users> > > > > > _______________________________________________ > postgis-users mailing list > postgis-users@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/postgis-users > -- Paolo Cavallini - www.faunalia.eu QGIS & PostGIS courses: http://www.faunalia.eu/training.html https://www.google.com/trends/explore?date=all&geo=IT&q=qgis,arcgis _______________________________________________ postgis-users mailing list postgis-users@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/postgis-users