Bug report #20541
Updated by Giovanni Manghi about 5 years ago
*New description:*
In QGIS 3 shapefiles are now *always* multipart, so the Topology Checker rule "must not have muultipart feature" always return errors for such datasource.
*
Old description:*
Prerequisite: Polygon shape (see attached shapefile) with clean topology after im- and export with GRASS (v.in.ogr.qgis, snapping threshold 0.1 m):
without invalid/overlapping/multipart geometries, without duplicates, with some allowed gaps.
Observation:
QGIS 2.18 - Topology Checker (check on invalid/overlapping/multipart/duplicates/gaps) recognizes the gaps. That's correct.
QGIS 3.4.1 - same topology check: The gaps are recognized and a lot of multipart features are reported. But there are no multipart features - so this should be an error.
In QGIS 3 shapefiles are now *always* multipart, so the Topology Checker rule "must not have muultipart feature" always return errors for such datasource.
*
Old description:*
Prerequisite: Polygon shape (see attached shapefile) with clean topology after im- and export with GRASS (v.in.ogr.qgis, snapping threshold 0.1 m):
without invalid/overlapping/multipart geometries, without duplicates, with some allowed gaps.
Observation:
QGIS 2.18 - Topology Checker (check on invalid/overlapping/multipart/duplicates/gaps) recognizes the gaps. That's correct.
QGIS 3.4.1 - same topology check: The gaps are recognized and a lot of multipart features are reported. But there are no multipart features - so this should be an error.