[Tagging] Consolidating tags for building attributes

Vincent Pottier vpottier at gmail.com
Tue Oct 8 08:51:14 UTC 2013

Le 08/10/2013 10:21, Pieren a écrit :
> On Tue, Oct 8, 2013 at 9:38 AM, Martin Koppenhoefer
>> Er, what?
>> https://wiki.openstreetmap.org/wiki/One_feature,_one_OSM_element
>> +1, that's exactly the reason. A building is not the same feature as the
>> business occupying it.
> Cool down, Martin. Amenity (or shop or whatever) reusing the building
> polygon is common practice. This guideline is just saying that one
> feature shouldn't be duplicated on multiple OSM elements. It's not
> saying that one OSM element cannot carry multiple features.
> Pieren
In pure logic :
"one feature implies one element" does not imply "one element implies 
one feature"

I can bring you to a building and say "that is the hospital" without 
being wrong...
But usually, the hospital is more than the building : parkings, 
heliport, garden...

More common : I can bring you to a building an tell "that is the church".
Even if some building=church are no more amenity=place_of_worship,
even if the amenity=place_of_worship is a part or is not in a building,

very very often the building=church is the amenity=place_of_worship
and the amenity=place_of_worship is the building=church
so using a single polygon makes sense, in a semantic meaning.

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