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Is there is a way in QGIS (or SQL, ArcMap) to split multi-geometries in polygons automatically. I could do this manually (split features, split multi-part to single-part etc...), but this would just be so time consuming. Here's a visual of what I'm wanting the polygons to look like: Bad Polygon 1

Good Polygon 2

As you can see polygon 2 has been broken up into 5 polygons instead of being a single polygon in polygon 1. I tried what this person has done in SQL HERE, but then that would only break polygon 1 into three polygons still having a multi-geometry polygon.

Is there a way to automate this process?

nmtoken
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Michael McKeever
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    The easy part is to explode the members of multipolygon into simple polygons, but how would you define the logic with splitting the ring shaped polygon into three? – user30184 Jun 13 '17 at 18:06
  • @underdark thank you for your reply, but I ended up figuring it out by my answer below. – Michael McKeever Jun 13 '17 at 19:59

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So my answer was similar to this problem HERE.

My solution was to first:

  1. Extract nodes from polygon layer.
  2. Perform delaunay triangulation on node layer.
  3. Perform a Symmetrical Difference in the geoprocessing tools with your triangulation layer as your input layer and your over-lapping layer as the difference layer.
Michael McKeever
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