Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I wanna know how to do this in QGIS:

enter image description here

I've tried many ways, but still can't find the right solution.

share|improve this question
Consider using Voronoi diagrams. Animated examples appear at…. – whuber Apr 23 '12 at 15:17

Don't remember if there is a specific tool, anyway if you need a powerful way to remove overlapping areas then just import your vector in a GRASS mapset, you can do it in the QGIS work environment using the QGIS/GRASS plugin. The GRASS vector model is fully topological so it just does not allow overlapping areas, that during the import are saved in a separate layer. After that you can export the GRASS vector with the "save as..." QGIS dialog.

share|improve this answer
Tried answer one -- imported to a GRASS set and then exported back to shapefile with Save As in QGIS -- but it made no difference, the overlapping layers persisted. Is there a step I'm missing? – user14068 Jan 8 '13 at 23:58

I'm not sure what you need, but from link you shared it looks as full manually operation. In QGIS the same manipulation can be done with Split Features tool.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

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