Wa sollen diese merkwürdigen  ungültigen Multipolygone darstellen:
https://www.openstreetmap.org/relation/16221650
https://www.openstreetmap.org/relation/16113376
https://www.openstreetmap.org/relation/1609445
https://www.openstreetmap.org/relation/16094460
https://www.openstreetmap.org/relation/1622165
https://www.openstreetmap.org/relation/15553482
