Bug report #16111

different (wrong) output of bufferalgorithm when used in graphical modeller

Added by Pieter Brusselman almost 7 years ago. Updated over 6 years ago.

Assignee:Victor Olaya
Affected QGIS version:2.18.2 Regression?:No
Operating System:windows Easy fix?:No
Pull Request or Patch supplied:No Resolution:
Crashes QGIS or corrupts data:No Copied to github as #:24023


With 4 different polygonshapefiles I'm doing the following steps: polygon to line -> merge them al together -> split lines on intersection -> polygonize -> inside buffer -> join attributes by location

When doing it by hand, step by step, I have no problem. When putting all those steps together in a model I get following error:

QgsFeature.setGeometry(QgsGeometry): argument 1 has unexpected type 'NoneType'. This happens at the last step.

The problem occurs with the inside buffer. When I use the inside buffer as output of the model and do the 'join attributes by location' by hand, I get the same error.

Related issues

Related to QGIS Application - Bug report #16115: different (wrong) output of 'join attributes by location'... Closed 2017-01-26


#1 Updated by Pieter Brusselman almost 7 years ago

When doing a validity check (Method GEOS) I get following message: GEOS error:could not produce geometry for GEOS (check log window), every error has a field area = 0.000

#2 Updated by Alexander Bruy almost 7 years ago

Looks like your dataset has invalid or empty geometries.

#3 Updated by Giovanni Manghi over 6 years ago

  • Priority changed from High to Normal
  • Status changed from Open to Feedback

Please attach sample project/data.

#4 Updated by Alexander Bruy over 6 years ago

  • Status changed from Feedback to Closed

Closed for the lack of feedback. Please reopen if necessary.

Also available in: Atom PDF