I want to create the Voronoi diagram from a set of point (see below). When I use the "Voronoi Polygons" tool from QGIS, there is an error :

File "C:/PROGRA~1/QGIS3~1.0/apps/qgis/./python/plugins\processing\algs\qgis\VoronoiPolygons.py", line 128, in processAlgorithm self.tr('There were no polygons created.')) _core.QgsProcessingException: There were no polygons created.

What do you think is the reason for that?

I use QGIS 3.0, and the tool works for other sets of points (random, for example).enter image description here

  • 1
    Hi, could you share the coordinates of your points?
    – KSlayerr
    May 17, 2018 at 15:20

2 Answers 2


Just a guess, but perhaps you have multiple instances of points on top of one another? As a multi-point layer. That would create an error where no voronoi polygons are created.

Also, check out your coordinate systems - perhaps there is a discrepancy there.


Several problems with the QGIS Voronoi tool were fixed in QGIS 3.2.2. Please try again with the lasted QGIS version.

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.