[Tagging] Deprecation - waterway=riverbank vs water=river

[Bert -Araali- Van Opstal]

Thank you for the clarification Martin, so if I understand you clearly,
it is not a role, as we don't want strict roles that restrict mappers,
OSM needs to be as free as possible.
The one feature - one element is a "Guideline" or "Good Practice"
One main or top-level tag is also a "Guideline" or "Good Practice",
however not (yet) clearly as a separate guideline defined in our wiki
(volunteers to improve it ?)

And if you allow me to be bold a policy statement regarding tagging
proposals and wiki pages:
We should define proposals and describe tagging and mapping principles
that support the "Guidelines" and "Good Practices" to the maximum
extend.  However they are not strict roles, proposals and wiki page text
should be setup in this context to promote or offer examples to support
them to the maximum extend. Proposals or descriptions that contradict
these "guidelines" and "Good Practice" are considered as less compliant
and/or of less quality and should be rephrased, rewritten or redesigned.
It is advised to always find a consensus from the community to nominate
a proposal or wiki page to be rewritten due to non-compliance with these
"Guidelines" or "Good Practices".
Non-compliance with the "Guidelines" or "Good Practices" should never be
the reason to reject a proposal or delete a wiki page. It should be a
motivation or advise to rewrite a proposal and non-compliant wiki pages
can be marked as "not good practice" description and thus be nominated
(after community consensus) for improvement.

Greetings, Bert Araali


On 15/02/2021 12:08, Martin Koppenhoefer wrote:
>
>
> Am So., 14. Feb. 2021 um 21:42 Uhr schrieb Bert -Araali- Van Opstal
> <bert.araali.afritastic at gmail.com
> <mailto:bert.araali.afritastic at gmail.com>>:
>
>     Is this a role or a guideline then, not clear to me, how do we
>     call it?
>
>     https://wiki.openstreetmap.org/wiki/One_feature,_one_OSM_element
>
>
>
>
> I don't recall if this was discussed, but the requirement to have only
> one "main" tag was introduced just "recently" (less than 2 years ago)
> to this page:
> https://wiki.openstreetmap.org/w/index.php?title=One_feature%2C_one_OSM_element&type=revision&diff=1873923&oldid=1873154
>
> The rule is "one feature should be represented only by one element in
> OSM", and one element means a way, a node or a relation. This rule
> still leaves a lot of room for interpretation, for example you could
> still have the area of a city mapped as place=city on a polygon and at
> the same time have a node with place=city for the same city, if you
> argue that this means the centre of a city. It all depends on what we
> agree that the tags represent, and what we consider a "feature".
>
> Having only one main tag on an object would be a different rule, and I
> find it somehow misleading to "hide" this under the headline "one
> feature one element".
>
> Clearly the one tag-rule is not currently followed, you can find
> millions of objects tagged as building=* plus something like amenity=*
> or shop=*, office=* etc. or barrier=* together with tags for an area,
> like landuse, amenity etc.
> If you look at the combinations of man_made=* there are also 1,67%
> combinations with highway (what's that?). 0,89% with natural, 0,85%
> with amenity, 0,77% with historic, 0,55% with barrier, 0,52% with
> power, etc.
> https://taginfo.openstreetmap.org/keys/man_made#combinations To be
> fair, the paragraph says "ideally", so it is not a strict rule, more a
> suggestion.
>
> You could also say: "phone=*" means a telephone connection, and then
> this tag, normally a property, becomes a "feature". Or
> addr:housenumber could be seen as a property, or as a feature,
> depending on your interpretation and on the context (other tags).
>
> Cheers,
> Martin
>
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