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How to merge/dissolve 3D polygons with common ID to create a singlepart building?

Question asked by Aleksander9 on Feb 16, 2018
Latest reply on Feb 20, 2018 by Aleksander9


I have a 3D city model made out of individual polygons. Polygons forming one building have a common ID (also attr like Type: Wall, Roof). I need to combine/merge/aggregate together shapes beloning to each building, so when I select a building it markes an entire entity and not just one of the polygons. The output should be a shapefile or multipatch. 


I tried using dissolve but it fails each time. I want to use data later in Pro and CityEngine.

Anyone has an idea how to do that kind of ID-based multipart to singlepart merge? 


I attached also sample data