[Tagging] public_transport=platform rendering on osm-carto

Jo winfixit at gmail.com
Wed Jun 20 17:19:02 UTC 2018


If v2 of the 'new' scheme means that we have to create 2 objects for each
and every bus stop and add both of those to the route relations and
duplicate details across them, then v2 has failed.

We should have exactly 1 object that represents the bus stop. A node next
to the way and only add that node to the route relations.

if there is an actual platform, we can draw a way or an area and tag it
highway=platform/railway=platform. These should not be added to the route
relations.

Neither should the stop_position nodes be added to the route relations, nor
should they get details like name, ref, etc.

So 1 node to represent the bus or tram stops, next to the way on either
side and only add details to those and only add these to the route
relations.

These nodes can get the public_transport=platform tags.

if we can start doing it that way, we will get a way of mapping public
transport that is easy to understand for everyone. If we don't the wiki
will remain murky, unclear and ambiguous.

I rest my case.

Polyglot

Op wo 20 jun. 2018 om 18:53 schreef marc marc <marc_marc_irc at hotmail.com>:

> Le 20. 06. 18 à 17:44, Jo a écrit :
> > Actually I have started to remove public_transport=platform from WAYS
> > with highway=platform and railway=platform. As far as I am concerned
> > public_transport=platform goes on NODES
>
> sorry I didn't understand why (or maybe yes I prefer to not understand)
> Zverik's propal that you clone to request that public_transport=platform
> as way should be downgraded to a node-only HAS FAILED !
> So if another mapper extend the node to better match the geometry
> of the plateform, why are you revert it ?
> yes wiki is ambigous. but for almost (?) all objects the extend
> from a node into a more precise geometry has always been considered
> an improvement, not a mistkae that need to be fixed.
> So the next contributor will probably add the PTv2 tags you deleted.
>
> > Removing those tags from ways comes from the objection of some people
> > that there would be both a way and a platform with the
> > public_transport=platform tag.
>
> I remember this talk about that on tranport (french-speaking transit)
> mailing when it became apparent that duplicate objects were so common
> in France that they affected stats at a regional scale.
> This resulted in a collective work to add missing PTv2 tags,
> many contributors spent many hours for that and fix a lot of mistake.
> Currently the region of french capital is nearly 100% PTv2 and at the
> country scale in france, there is almost no highway=plateform tag left
> that does not also have its PTv2 equivalent.
>
> Of course one stop in one direction should have :
> - only one plateform per "passenger waiting area" (including all variant
> public_transport=platform highway=platform and railway=platform)
> and/or
> - one stop_position
>
> having one "passenger waiting area" mapped as a node + as a way + a MP
> like I already see, with tags randomly distributed or duplicated between
> these osm objects that represent the same thing, it is a mess....
>
> and PTv1 tag should of course be put only on one of the same objets.
> If not, you make duplicate objet for the same feature... like currently.
>
> > In other words, the rendering of *=platform on WAYS is just fine as it
> is.
>
> of course that it is the continuation of Zverik's failed proposal.
> but check current pratice :
> the supremacy of public_transport=platform over highway=platform
> is even clearer if we take into account the duplicate tag
> 900k for public_transport=platform without (highway=platform or
> railway=platform)
> 84k highway=platform + public_transport=platform
> only 9k highway=platform without public_transport=platform
> the community has already twice rejected this unintelligible wish to
> have a PTv2custom with different rules totally useless depending
> on the transport mode.
> PTv2 consists precisely in making things more HOMOGENEOUS.
> So please reconsider your modifications and take into account that
> highway=plateform and public_tramsport=plateform are 2 tags for the same
> concept (a passenger waiting area for a public transport), even if the
> render support only the oldest and less common schema for *=platform
>
> Regards,
> Marc
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