On 18.08.2017 10:01, Tom Pfeifer wrote: > If e.g. the lower floors of the apartment building is wider than the > upper floors, you can tag the outline with both, building=apartments and > building:part=yes and the appropriate 3D-properties, and the narrower > upper floors with building:part=yes and 3D-properties, but without > building=*.
It's not a good idea to use building and building:part tags on the same way. Doing so typically gives incorrect information to data consumers, because the number of levels for the building as a whole is not the same as the number of levels for the building part. In your example, the building part for the lower levels would be tagged: building:apartments + building:part = yes + building:levels = <number of lower levels> And as you said, one important function of the building outline is backwards compatibility for non-3D-applications. Such an application will conclude that this building has <number of lower levels> levels, which is not the case. Tobias _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
