Bug report #16115
different (wrong) output of 'join attributes by location' when used in graphical modeller
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: |  Victor Olaya | ||
| Category: | Processing/Modeller | ||
| 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 #: | 24027 |
Description
It is a similar bug like #16111. When doing spatial analysis within a model it produces a wrong result. When doing it by hand it works.
The case:
I have 3 layers
- points (located along/nearby lines)
- linestrings
- polygon
1/ I make a buffer (10m) of the polygon layer
2/ I do a spatial join from points and buffered polygons (take summary of intersecting features, statistic = mean)
3/ I make a slight buffer (0,5m)of the enriched points to make sure they will overlap the corresponding line
4/ I do a spatial join from the lines with the buffered points (take summary of intersecting features, statistic = mean)
Result: all statistics have null value.
When I take the buffered points as the outcome of the model and do the spatial join with the linestrings by hand, I get the right results.
Related issues
History
#1
Updated by Pieter Brusselman almost 8 years ago
When removing unvalid geometries (by hand or implemented in the model) then it works.
But when joining by hand (without removing unvalid geometries) there is no problem.
I think the behaviour of doing it in a model or doing it by hand should be the same.
#2
Updated by Giovanni Manghi over 7 years ago
- Priority changed from High to Normal
- Status changed from Open to Feedback
Please attach sample project/data.
#3
Updated by Alexander Bruy over 7 years ago
- Status changed from Feedback to Closed
Closed for the lack of feedback. Please reopen if necessary.