I see nothing wrong with building=* on a node, used 772612 times.
Typical cases are: - somebody collects house numbers along a road, but has no access to the geometry. Thus she can use plain addr: tags on unbuilt properties, and add building=* where a building is visible. - aerial imagery of lower resolution, where the buildings are just distinguishable but Buildings on nodes used to be rendered in the tiles-at-home style. It was recently discussed on carto for the main map, but decided not to in order to encourage mapping the geometry. But it should still be considered correct tagging. I noticed in the history there seem to be conflicting opinions about relations as well, some see multipolygons as relation and some not. tom Lukas Sommer wrote on 2015-02-14 08:45:
Hello. The english wiki page key:building says that this key may not be used on nodes. However, most (but not all) of the english wiki pages for the individual values (like building=apartments) allow the usage on nodes. I’m not sure if it is useful to have a different policy for different values here. Wouldn’t it be more useful to have to have the same rules for _all_ values of the key “building=*”?
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