Timeline for QGIS Union Error: multiple overlapping polygons created where only one should exist?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 18, 2017 at 0:55 | comment | added | ahmadhanb | I am glad you discovered the problem. | |
| Apr 17, 2017 at 14:11 | comment | added | Christoph Nolte | Finally found this. It's an unresolved bug in QGIS. hub.qgis.org/issues/15962 | |
| Apr 15, 2017 at 20:17 | comment | added | Christoph Nolte | The error occurs even if all input files are valid, single-part, non-overlapping, non-duplicated geometries as in the files available here. BTW: I enormously appreciate your pointers, ahmadhanb. They have helped me clean my files. Unfortunately, the issue is not solved. | |
| Apr 14, 2017 at 1:45 | comment | added | ahmadhanb | You have duplicate geometries (duplicated polygons) in 25015_f.shp and invalid geometries as some polygons overlaying each other in 25015_f_padus.shp. You need to clean these files by deleting the duplicated polygon and adjust the polygon that overlay each others. For the first one, you may need to use Delete Duplicate Geometries from Processing menu, and for the second file you may need to cut the polygon manually to remove the part that overlay the other polygon. | |
| Apr 13, 2017 at 13:18 | comment | added | Christoph Nolte | Marked as the solution, because it resolved the issue for these files. However, just a few steps down the road, I got exactly the same error again, this time with valid single-part files - available here. Did I miss anything? | |
| Apr 12, 2017 at 19:56 | vote | accept | Christoph Nolte | ||
| Apr 12, 2017 at 1:18 | history | answered | ahmadhanb | CC BY-SA 3.0 |