Bug report #15793
Fill ring tool is broken
|Affected QGIS version:||3.5(master)||Regression?:||Yes|
|Operating System:||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:||invalid|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||23713|
Qgis 2.18 32bit osgeo network installer Win 10.
If you have a polygon with a ring, when you use fill ring tool, you obtain a new geometry (as you expect) and a new part of the previous geometry.
in a shapefile
1 - add a polygon
2 - save it
3 - add a ring
4 - save
5 - fill it with fill ring
- a new geometry added inside the shape of the ring
- a new "multipart" added without a correct shape
Also in spatialite the same, but it doesn't allow to save, and, if you discard the editing, the feature will be saved with a new unformed multipart.
If you try to delete the new multipart, all the geometry will be deleted.
#3 Updated by salvatore fiandaca about 1 year ago
- Affected QGIS version changed from 2.18.0 to 3.5(master)
- Description updated (diff)
- Priority changed from Normal to High
- File bug.gif added
- Regression? changed from No to Yes
- Operating System set to Windows 10 64 bit
problem still present in 2.18.28, in 3.4.4 and in the master
it's a regression based on this link:
#7 Updated by Giovanni Manghi about 1 year ago
- Status changed from Feedback to Closed
- Resolution set to invalid
I see where the misunderstanding come from:
the tool in QGIS was made to open/create a ring in a polygon and automatically fill it with a new polygon
the name "fill ring" makes users think they can fill an existing ring by digitizing a polygon around the ring --> this will cause the result as shown in the attached screencast.
Technically there is no bug BUT I agree that the tool name is at least misleading AND that actually a tool to fill existing rings (possibly with 1 click) should be added to the digitizing toolbar.
#10 Updated by Giovanni Manghi about 1 year ago
Jürgen Fischer wrote:
Nyall Dawson wrote:
The tool already does this -- shift click an existing hole. Maybe it's just a documentation issue, or someone needs to read existing docs? ;)
shame on me, I missed the functionality or maybe I just forgot about it.