[Tagging] The actual use of the level tag (redux)

[Andrew Harvey]

I think https://wiki.openstreetmap.org/wiki/Key:level reads well now,
though I think some graphics showing how it relates to level:ref would be
very helpful.

For the signposted level whether that's a number or letter or combination
use level:ref=*. level=* is purely a numeric count of the floors for data
consumers and is never guaranteed to correspond with the signage. As such
level:ref=* should always be used as the display for users and never
level=*. level=* should only ever be used behind the scenes to render the
map.

So a building which starts from level 1, and then has level 2, skips 3,
then level 4 would be

level:ref=1 + level=0
level:ref=2 + level=1
lever:ref=4 + level=2


On Wed, 16 Mar 2022 at 01:25, Marc_marc <marc_marc at mailo.com> wrote:

> Le 15.03.22 à 08:05, Minh Nguyen a écrit :
> > it states a clear preference for level=0 to represent
> > the ground floor, even in regions where the ground floor is normally
> > called the first floor.
>
> I consider that level is linked to the local numbering of the building
> (if present). so if a building has a level 12 and then 14, I will never
> fill in level=13, no matter if it is in a country where the ground is
> represented by 0 or 1
> in the same way, if a building has a level 0 0.5 1, I don't see any
> reason to invent another numbering which often becomes incomprehensible
> (osm would be unwise to give a company a level=x when it is something
> else indicated on the spot)
>
> > Anecdotally, if such tagging ever came to the attention of mappers on
> > talk-us or OSMUS Slack, I'm pretty sure it would be quickly identified
> > as an error.
>
> the best thing would be to talk to them about it (and until then, we can
> consider the tag as poorly documented and therefore not usable in this
> country)
>
> > For a more holistic analysis
>
> I very rarely put level=0 and almost systematically level=1,
> do you deduce that I'm in a country where level=1 is dominant ?
> no, I simply didn't put level=0 on 99% of the items I create
> if the building have no level<>0 items, I nearly never add level=0
> to shop at the ground level for ex.
> I'm not saying it's a good thing, it's just my experience.
>
> Regards,
> Marc
>
>
>
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