Feature request #9326
Tolerance (snapping) during analyses
Status: | Feedback | ||
---|---|---|---|
Priority: | Normal | ||
Assignee: | - | ||
Category: | Processing/QGIS | ||
Pull Request or Patch supplied: | No | Resolution: | |
Easy fix?: | No | Copied to github as #: | 17933 |
Description
In case of layers with essentially the same shapes, with different precision, the diff between these layers produces a number of virtually 0 width polygons.
These microareas are tricky and time consuming to remove (if they are isolated, a possible solution is to select and remove those smaller than an arbitrary threshold, but if they are linked to some "real" polygons, this will not work).
I suggest to add a parameter in analyses, to either snap original data within a threshold before running the analysis, or to clean up the results afterwards
History
#1
Updated by Paolo Cavallini over 10 years ago
See a discussion on: http://lists.osgeo.org/pipermail/qgis-developer/2014-January/030119.html
#2
Updated by Paolo Cavallini over 10 years ago
Probably this could be solved with a new command, allowing the user to arbitrarily reduce the precision of coordinates (filling up the rest with 0s).
#3
Updated by Giovanni Manghi over 7 years ago
- Category changed from 44 to Processing/QGIS
#4
Updated by Giovanni Manghi over 7 years ago
- Easy fix? set to No
#5
Updated by Paolo Cavallini over 6 years ago
- Status changed from Open to Feedback
- Description updated (diff)
Still valid? With automatic reprojection now in Processing the issue can be even more serious.