QGIS Topology – Generalizing Polygon Files While Maintaining Topology

generalizationqgistopology

I have a polygon Shapefile, which I need to generalize. How can I generalize the poligons and ensure that there are no topological errors like "slivers".

I already tried:

  1. Vector -> Geometry Tools -> polygones to lines
  2. Vector -> Geometry Tools -> simplfy geometries …
    here I can already see on the screen, that I am producing overlaps and gaps
    nevertheless now I try
  3. Vector -> Geometry Tools -> lines to polgones

and here the program show an error and crashes

enter image description here

Best Answer

GRASS is topology-aware. You can use v.generalize from the Processing toolbox to simplify polygons and if the input data is topologically correct so will the output.

enter image description here

Related Question