[Tagging] Variable position

[Matej Lieskovský]

I respectfully disagree.

The benches are there, quite probably within 10m of their location in the
map. While this is abysmal accuracy, it is not entirely wrong. Isn't "there
aren't any known benches here" a worse information than being 10m off?

That same park has several stone benches that do not move. Let's say that I
tag the park with "bench=yes". So there is a park with "bench=yes" and
"bench:material=wood" that contains several "amenity=bench" with
"material=stone". I can imagine this would be rather confusing even to a
human.

Do we have a landuse=bench tag? Do we really want one? It does not feel
like the right key... But yes, some way of saying "there are 15 benches
somewhere in this area" sounds like a reasonable solution. Not sure if
better, but at least usable.

A "position=variable" tag feels more natural, but I do agree that it is far
from perfect.

On 28 December 2017 at 12:27, marc marc <marc_marc_irc at hotmail.com> wrote:

> Le 28. 12. 17 à 11:05, Matej Lieskovský a écrit :
> > If we mark the object with a note:
> >   - an unaware data consumer will see the object with an inaccurate
> position
>
> your proposal has the same defect as those that create objects that do
> not exist (highway or building for example) and that add tags
> (in_use=no, construction=yes, state=proposed) to say that the main
> information is wrong, hopping that everbody else 'll parse additional
> tag to have the correct meaning.
>
> Osm is a geographical database, not an inventory. therefore by default
> it can be expected that an object is at its position. if this is not the
> case and if you don't like the idea of making an area for the position
> where it is, I think you will have to use a namespame like variable: in
> order not to mislead the 99.99% of uses that ignore your new tag.
> yet when I compare with existential functions, a restaurant for example,
> you don't put a node in every place where there is a seat, you put the
> info on the poi with outdoor_seating tag
> https://wiki.openstreetmap.org/wiki/Key:outdoor_seating
> For a bus stop or a shetler, we use bench=yes
> https://wiki.openstreetmap.org/wiki/Key%3Abench
> you can draw an area to delimit the location of the benches and add the
> corresponding lander/lancover/leisure tag
> can it not fill for your need without giving wrong info that parse major
> tags ?
>
> Regards,
> Marc
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