Bug report #18913

Union tool gives completly unpredictive results

Added by Dominique Lyszczarz over 5 years ago. Updated over 5 years ago.

Affected QGIS version:3.0.2 Regression?:No
Operating System: Easy fix?:No
Pull Request or Patch supplied:No Resolution:fixed/implemented
Crashes QGIS or corrupts data:No Copied to github as #:26745


I've attached 2 shapefiles that illustrate the issue. The result of the union gives 79 features and lot of them are overlayed. SAGA union works correctly, it gives 1495 not overlayed features and the attributes data are correctly affected to each new features.

I haven't test it on qgis 2.18 but as I remember I never encounter this kind of issue with union tool on previous version.

union_test.zip (501 KB) Dominique Lyszczarz, 2018-05-05 12:25 PM


#1 Updated by Nyall Dawson over 5 years ago

  • Status changed from Open to Feedback

Please check with a nightly release - the union tool has been rewritten from scratch for 3.2

#2 Updated by Dominique Lyszczarz over 5 years ago

Thank you Nyall for pointing this, the new union tool now works correctly, in this example I get the same result as SAGA (with split part unchecked). The issue can be closed.

#3 Updated by Alexander Bruy over 5 years ago

  • Resolution set to fixed/implemented
  • Status changed from Feedback to Closed

Fixed in 3.2

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