Bug report #14908
Processing plugin intersection module doesn't work properly
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: |  Victor Olaya | ||
| Category: | Processing/QGIS | ||
| Affected QGIS version: | 2.14.3 | Regression?: | No |
| Operating System: | Easy fix?: | No | |
| Pull Request or Patch supplied: | Yes | Resolution: | |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 22861 |
Description
The " intersection " module of processing plugin doesn't work properly .
In attached example intersecting the layer "B" with the layer "A" doesn't return any feature while intersecting the layer "A" with the layer "B" is properly returned a feature .
The cause of this bug is the " break " statement at line 106 of the "processing\\algs\\qgis\\Intersection.py" file that prevents the evaluation of the successive intersections . Removing that line the algorithm works correctly.
The implemented algorithm in ftool plugin has a different structure and functioning properly (see lines 961 to 988 in fTools\\tools\\doGeoprocessing.py ).
Associated revisions
[processing] do not exit loop in intersect if there are errors
fixes #14908
History
#1
Updated by Alexander Bruy over 8 years ago
- Tag deleted (
processing, intersection) - Status changed from Open to Feedback
It is not a bug, if intersection result has invalid geometry it skipped.
#2
Updated by AZeta Gis over 8 years ago
Invalid geometry is skipped but the break line interrupts entire cicle and other geometries that overlap first geometry and produce valid intersections don't be evaluated.
In the attached example intersection result changes if input layers are inverted.
#3
Updated by Victor Olaya over 8 years ago
- Status changed from Feedback to Closed
Fixed in changeset f4ca847660aa066f47af518bcbce00bd52788c9c.