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I have a problem with the mall that I have fiddled with in this changeset.
The problem is that the two building parts 370434881 and 370434882 cross a road. They are first-floor parts of the mall where the road passes under. You can see them in for example this picture: I suppose I could try tagging them like the nearby passage through the building part 370411677, but I think of these parts of the mall as less of a tunnel through a building than smaller building parts crossing the road. I have currently tried tagging the building parts as How would you suggest tagging this situation to get the road correctly rendered as covered by the buildings? |
This is not the question you should be asking. Instead, you should be asking a question like, "How would you suggest tagging this situation to best represent the reality on-the-ground?" The rendering will vary depending on the data consumer, so don't worry about that part. Just make sure the objects are tagged as accurately as you can. As for how I would tag it, I would tag the building part as layer=1 (because it physically crosses above the implicit layer=0 highway) and the highway underneath as covered=yes. At the time of my writing this, it appears that this is how these objects are already tagged, so I don't see any reason to change anything. The "Standard" rendering at osm.org renders highways differently when tagged with covered=yes, so there's already an indication that a portion of the highway is covered. I guess my question here is then: Should the mall be represented by a multipolygon (as it is now)? The entire multipolygon is implicitly
(26 Oct '17, 09:18)
ThomasA
Yes, the mall should be represented as a multipolygon because it has a hole. The way https://www.openstreetmap.org/way/370434882 is tagged with building:part=yes and layer=1. As far as I understand the building:part spec that's the correct tagging: the building part is a separate way that overlaps the base building (which, in this case, happens to be a multipolygon).
(27 Oct '17, 20:14)
dsh4
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