Bug report #19576

geometry checker duplicate nodes bad results

Added by zimirrr leonid about 2 years ago. Updated about 2 years ago.

Status:Open
Priority:Normal
Assignee:-
Category:C++ plugins/Geometry Checker
Affected QGIS version:3.2.1 Regression?:No
Operating System:win 7 Easy fix?:No
Pull Request or Patch supplied:No Resolution:
Crashes QGIS or corrupts data:No Copied to github as #:27403

Description

latest qgis 3.2.1, windows 7.

I run geometry checker for duplicate nodes with tolerance 1e-6 and it founds a lot of duplicates but when I check them there is only one node, no duplicated ones.
If I change tolerance the number of errors changes. With 1e-10 no errors was found.

It shows duplicates for polygons and linestrings. Can somebody check it?

test_.gpkg (136 KB) zimirrr leonid, 2018-08-13 08:25 AM

History

#1 Updated by Giovanni Manghi about 2 years ago

  • Status changed from Open to Feedback

Possibly a problem with rounding when using very small tolerances. What is the problem in using a bigger tolerance?

#2 Updated by zimirrr leonid about 2 years ago

the biggest allowable value 1e-3 still produces wrong errors.
I've changed project projection to epsg:3857 (previous was epsg:4326) nothing changes.

#3 Updated by Giovanni Manghi about 2 years ago

Can you attach a sample of your data?

#4 Updated by zimirrr leonid about 2 years ago

#5 Updated by Giovanni Manghi about 2 years ago

  • Status changed from Feedback to Open

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