# [Tagging] building = house vs detached.

Jmapb jmapb at gmx.com
Mon Jul 23 15:08:43 UTC 2018

```On 7/23/2018 11:02 AM, Colin Smale wrote:
>
> Let's stop conflating concepts and worrying about what things are
> "called", and describe indisputable characteristics of objects, in
> this case how many floors and how/whether the dwelling is connected to
> its neighbours. The use of house=terrace may be justified for a
> transitional situation where a whole terrace has been mapped as a
> single building and not yet split into individual units. When it is
> split, it is just a house - the geometry (shared nodes) will show that
> it connects to the adjacent properties and allow you to derive that it
> is terraced.
>

Had a good sleep in my single-storey building=shed last night, lulled to
sleep by rain on the roof, and woke up to the conclusion that the
attached/detached/semi-detached distinction is not a great use of the
building tag. As mentioned by AndrĂ©, we can literally see on the map if
these house footprints are attached via shared party wall. So there's
really no need to describe the attached-ness using the building tag. For
number of floors, we have building:levels=*. So the building tag is
freed up to describe the characteristic style of the buildingÂ  -- hut,
shed, bungalow, house, apartments, villa, static_caravan -- or just
residential or yes -- and if we want to know how attached it is or
isn't, look at the footprint. (Ignoring for the moment the fact that
buildings can also be mapped as footprint-less nodes.)

I still see the value of building=terrace for using a single building
way to map an entire row. Especially for those that really are
physically constructed as single buildings.

And I could also see the case for building=duplex (though it's not
currently endorsed by the wiki) because many duplexes are top/bottom,
and even in side-by-side duplexes it's not always easy for a mapper to
see where the party wall lies in order to divide the footprint into two
houses. (Currently I'd just tag these building=residential.
Wiki-abiding, and it avoids the march towards triplex, quadplex, etc.)

J

```

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