[Tagging] Binding numbers

[Niels Elgaard Larsen]

Bert -Araali- Van Opstal:
> Can you give an example how a complete address is written ? Don't focus to much on 
> the key descriptions, they are defined to cover as much as possible cases worldwide.
> 
> So far I understand you have a street with a site that has a single number, related 
> to street numbering.  On this site you have several buildings with every building 
> it's own building nr., related to the site numbering  Then each building has several 
> units or flats or apartments each with their own label, name or number relate to the 
> building numbering ?

It is common with e.g. hospitals, universities, large companies, etc. Usually tagged 
with "name" or "ref"
Which is used by data consumers, but not very well.

Bispebjerg Hospital:
https://www.openstreetmap.org/#map=18/55.71317/12.54046

Building 10 has house:number 10.
But building 6 has house:number 5 and building 5 has house number 3.

Buildings could be named "Building 5". Or "Bygning 5", localization would be a 
complication. And it is too verbose.

It just is confusing.
On their own map
https://publikationer.regionh.dk/pdf/full-715/kort-over-bispebjerg-hospital.pdf
they show entrances based on both building numbers and house numbers. So 20D is 23B 
and  20B is 23C, etc.


NBI:
https://www.openstreetmap.org/way/218541784
Uses letters for buildings. That works much better

SSI:
https://www.openstreetmap.org/way/28074637
Here building names are tagged with "ref"
It looks OK with Osmand because there are almost no addresses.

Gadehavegård:
https://www.openstreetmap.org/way/568142421
Have building names as "ref" and multiple addresses per building.
Osmand only show addresses at larger zoom leves. And then show building names in a 
smaller font.


I think that "ref" is more appropriate. It gives data consumers a change to handle it 
better. E.g. to show ref on buildings inside a house icon. And a building could have 
both a name and a building number.

-- 
Niels Elgaard Larsen