Bug report #8994

Difference in topology check between Topology Checker Plugin and Geometry tools

Added by Moreno Comelli over 10 years ago. Updated almost 5 years ago.

Affected QGIS version:master Regression?:No
Operating System:Windows Easy fix?:No
Pull Request or Patch supplied:No Resolution:end of life
Crashes QGIS or corrupts data:No Copied to github as #:17651


When I check the validity of a closed polyline, I get these results using different tools:

- no errors using Topology Checker Plugin
- intersection using Vector-->Geometry tools-->Check geometry validity

The geometry should be valid, since it's been imported in GRASS using proper snapping options.
In attach you can find the GRASS dataset with the 'invalid' geometry and the screenshot displaying the error.
Same problem in QGIS 2.0.1 and 2.1.0 Master (5f5cd4c), on Win XP x64

corr_geom.zip - GRASS dataset with invalid geometry (5.13 KB) Moreno Comelli, 2013-11-04 01:29 AM

topology_error.png - Screenshot about topology error (138 KB) Moreno Comelli, 2013-11-04 01:29 AM


#1 Updated by Giovanni Manghi almost 7 years ago

  • Easy fix? set to No
  • Regression? set to No

#2 Updated by Giovanni Manghi almost 5 years ago

  • Resolution set to end of life
  • Status changed from Open to Closed

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