Here is what I'd like to achieve in QGIS.

Is there a processing tool to remove the overlapping part of polygons?

Remove overlapping part of polygons

It is also very important that they do not get merged during the process and that they keep their original attributes since I need to work with them afterwards.

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    How should the tool determine which polygon should be clipped? – underdark Jul 11 '16 at 16:21
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    This actually doesn't matter much in the end – Enzoupi Jul 12 '16 at 7:32

You can use the 'Check Geometries' plugin (Vector/Geometry Tools/Check Geometries) to remove overlapping areas.

enter image description here enter image description here enter image description here

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    Thanks for this answer. This could be the solution but when I open the 'Check geometries' in QGis 2.14.3 Essen on Windows I don't get this check box that your screenshot is showing ! What am I missing ??? – Enzoupi Jul 12 '16 at 7:23
  • You have to run 'Check for overlaps smaller than (map units sqr.)'. Don't forget to enter a value, that's higher than the overlaps. – eclipsed_by_the_moon Jul 12 '16 at 9:01
  • @eclipsed_by_the_moon, I´ve the same problem, but when i execute "Check Geometries" as you said, My QGIS 2.18.8 crashes and closes. Do you have any idea why this is happening? I got a large numbers of errors, like 600 overlap errors in my data :( – Kleber Barcelar May 25 '17 at 14:41
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    @Kleber Barcelar, please open a bug report and provide your data at hub.qgis.org. Unfortunately, the geometry checker crashes quite often. – eclipsed_by_the_moon Jun 3 '17 at 19:47
  • the check geometries doesnt have all this stuff ??? – Luffydude Feb 1 '18 at 10:41

You can use the function Symetrical Difference. In QGIS: Vector -> Geoprocessing Tools --> Symetrical Difference. Here is a brief overview of various tools: Basic Editing Geoprocessing Tools in QGIS

Now we come to your problem. A brief example:

enter image description here

The function Symetrical Difference is started. Select a layer as Input Layer and another layer as Difference Layer. The result looks like this:

enter image description here The geometries are further individual geometries and attributes have not changed.

  • Thanks for your answer. However, I forgot to precise that gaps are to be avoid also. In the end I want one and only one polygon. – Enzoupi Jul 12 '16 at 7:21
  • @Enzoupi The picture in your question has two polygons. – PolyGeo Jan 1 at 2:29

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