Using the following:

  • Layer 1: Voronoi polygons
  • Layer 2: Circles buffer for each points, polygons

When I Cut/Intersect in QGIS, here is what I can get as results. This is ALMOST what I want. The thing is I would rather limit the circles to adjacent ones instead of the Voronoi polygon itself.

(See image below, red arrows demonstrate the issue, I want this portion to be associated to the other circle instead)

I hope it's clear. Is there a way to do that? I've been trying a lot of things without any success.

enter image description here

  • You want to clip individual Voronoi shapes with a limiting buffer, not make a single common buffer from all points. Usually this would need to be done inside a loop or with a SQL query.
    – Vince
    Commented Jun 1, 2023 at 20:50
  • Cercles and voronoi polygons do not seem to match. Normally, the lines delimiting voronoi polyons should match the point where two buffers meet. I suspect a projection issue (you used different projections for buffer and voronoi polygons). Can you share your exact workflow how you get the buffers and the voronoi polygons? Can you share all layers (at least a sample)?
    – Babel
    Commented Jun 1, 2023 at 20:51
  • 1
    Voronoi polygons seem to be wrong, see e.g. the line marked with the top red arrow: the line delimiting the two neighboring points should be perpendicular to the connection of these two points, but it is clearly not. So something went wrong when creating the voronoi polygons.
    – Babel
    Commented Jun 1, 2023 at 20:54
  • @Vince, i think you are right, but do you have an exemple how to do that in QGIS? Commented Jun 2, 2023 at 12:12
  • 1
    Check this answer please: gis.stackexchange.com/a/416199/29431 Commented Jun 2, 2023 at 15:33

1 Answer 1


I found a QGIS model that does exactly what I need. See example of results. I also added the link to the MODEL3 file, see below. Hope it helps whoever needs to accomplish the same thing as me.

Link to download

enter image description here

  • 3
    This does not really answer the question in the sense that someone else with the same problem does not get any useful information what caused the problem. It would be good to include that information
    – Babel
    Commented Jun 2, 2023 at 13:32
  • 3
    This Answer doesn't contain the answer, just the fact that you found an answer. The whole point behind the Question/Answer model is that others can benefit.
    – Vince
    Commented Jun 2, 2023 at 14:05
  • Ok I see, pretty new to this forum so I'm not sure what are all the rules when answering questions. But i feel it can help other people also as it really suits my need and what I was looking for :) Commented Jun 2, 2023 at 20:37

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.