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AreaOnAreaOverlayer - Overlaps only?

  • April 26, 2018
  • 2 replies
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According to the documentation: "The AreaOnAreaOverlayer takes in area features. All polygons are considered against each other, and where they overlap, new polygons are created that represent both the overlapping area and the original areas with the overlap removed."

All I need are the overlapping areas themselves, not the 'original areas with the overlap removed'.. It seems like this should be a simple check box in the AreaOnAreaOverlayer tool? But I'm using three additional transformers to weed out those 'original areas' (Clipper, and a pair of testers) . Am I missing something (probably something very obvious)?

Thank you!

Best answer by erik_jan

The AreaonAreaOverlayer adds an attribute _overlaps.

Finding the overlapping areas can be done by adding a Tester transformer to look for _overlaps > 1.

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erik_jan
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  • April 26, 2018

The AreaonAreaOverlayer adds an attribute _overlaps.

Finding the overlapping areas can be done by adding a Tester transformer to look for _overlaps > 1.


The AreaonAreaOverlayer adds an attribute _overlaps.

Finding the overlapping areas can be done by adding a Tester transformer to look for _overlaps > 1.

I totally didn't see that - thank you for pointing it out!