Bug report #5789
negative buffer: fTools buffer tool should delete the records of features that eventually have disappeared
| Status: | Closed | ||
|---|---|---|---|
| Priority: | High | ||
| Assignee: | - | ||
| Category: | Processing/QGIS | ||
| Affected QGIS version: | master | Regression?: | |
| Operating System: | Easy fix?: | ||
| Pull Request or Patch supplied: | Yes | Resolution: | |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 15281 |
Description
new description:
When doing a negative buffer of a polygon layer, there is the chance that (if the buffer distance is above a certain value) a few features will disappear. At this moment the records in the table of attributes belonging to this no more existing features are kept, and this create many inconsistencies (at canvas level, at attributes table level and so on).
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old description:
When applying a negative buffer to objects, if they are smaller than the buffer, features without any points are put in the output shape file.
Reproducable in version 1.7.4 and 1.8.0 with the shape files in attachment with a negative buffer of -8 meter.
PS: the check geometry tool doesn't report this... I made a separate bug report for this: #5788
Associated revisions
History
#1
Updated by Paolo Cavallini about 12 years ago
- Target version set to Version 2.0.0
#2
Updated by maning sambale over 11 years ago
- File Screen_Shot_2013-04-13_at_11.35.13_AM.png added
I confirm this behavior in the latest nightly build. In addition, if the negative buffer distance is smaller than the input polygon, it still creates an attribute record in the attribute table.
The attached screenshot shows that only one polygon (in black) is displayed but there are two rows in the attribute table.
System: Ubuntu precise latest nightly build.
#3
Updated by Paolo Cavallini over 11 years ago
- Category set to 44
#4
Updated by Giovanni Manghi over 11 years ago
- Priority changed from Normal to High
- Subject changed from fTools Buffer tool used with with negative distance creates NULL features to negative buffer: fTools buffer tool should delete the records of features that eventually have disappeared
#5
Updated by Daniel Vaz over 11 years ago
Please see https://github.com/qgis/Quantum-GIS/pull/732 that fix this bug.
Thanks in advance
#6
Updated by Giovanni Manghi over 11 years ago
- Pull Request or Patch supplied changed from No to Yes
#7
Updated by Nathan Woodrow over 11 years ago
- Status changed from Open to Closed
Fixed in changeset 2192cc70049f9d21f954a9324b8fdd5128d71758.
#8
Updated by Giovanni Manghi over 7 years ago
The "ftools" category is being removed from the tracker, changing the category of this ticket to "Processing/QGIS" to not leave the category orphaned.