[Tagging] Lyft and nameless sectioning in OSM

[Minh Nguyen]

Vào lúc 09:12 2022-10-12, Evan Carroll đã viết:
>     if you have x number of detached residences occupied by offices,
>     it is not a landuse=residential
> 
> 
> Then it's mistakenly tagged. You do not use `building=detached` for 
> shops and offices. Per the wiki, 
> https://wiki.openstreetmap.org/wiki/Tag:building%3Ddetached 
> <https://wiki.openstreetmap.org/wiki/Tag:building%3Ddetached>
> 
>  > A detached house is a free-standing residential building usually 
> housing a single family. Known as a/single-family home/in the United 
> States, a/single-detached dwelling/in Canada, a/separate house/in New 
> Zealand and/Maison individuelle/in France.
> 
> It includes the _function_ of the building.

Strictly speaking, building=* is about the building's original function 
inasmuch as it influenced the building's construction, whereas 
building:use=*, a much less common key, closely reflects the building's 
current occupants. A building=detached could very well be functioning as 
a nonresidential dentist's office or insurance agency.

This distinction is not very evenly applied in practice. For example, 
many modern American church buildings are architecturally 
indistinguishable from commercial buildings or retail storefronts, but 
many get tagged as building=church anyways, because there's so much 
variety in religious architecture anyways. Some renderers like osm-carto 
infer prominence from building=church, befitting a boxy Texas megachurch 
without a steeple that nonetheless dominates the surrounding neighborhood.

Similarly, a layperson may find it difficult to discern that a detached 
house was long ago converted from a firehouse, so they tag it as 
building=detached instead of building=fire_station. But in some places, 
mappers have been more rigorous about respecting each building's 
architectural origins.

-- 
minh at nguyen.cincinnati.oh.us