railway=platform unambiguously refers to an actual platform, mapped as a way or as an area.
public_transport=platform + tram=yes (+railway=tram_stop) can be mapped on an isolated node (so not part of the railway=* way). It would be my preference to ONLY map it on (isolated) nodes. That's what I do for bus stops public_transport=platform + bus=yes (+highway=bus_stop). Nodes should be preferred, as they have coordinates. And all the extra details like name, ref, route_ref, operator, network, zone should be mapped ONCE on these nodes. If we can move to such a scheme it would simplify public transport mapping in OSM a lot. At some point it was decided to use public_transport=stop_position for a node which is part of the highway/railway and public_transport=platform for the isolated node next to the highway where the passengers wait. Maybe it would have been better to use public_transport=pole for this purpose, or public_transport=passengers or public_transport=abstract_approximate_position_on_node_next_to_way_containing_all_the_details_for_this_stop_and_these_are_the_nodes_that_represent_the_stops_in_the_route_relations. But we use public_transport=platform, regardless of whether an actual platform is present. If there is an actual platform, it can be mapped as a way or area, with possibly tactile_paving=yes, wheelchair=yes, but no need to repeat the name on them and no need to add them to the route relations. They can be added to stop_area relations. Polyglot 2018-02-20 22:28 GMT+01:00 Selfish Seahorse <selfishseaho...@gmail.com>: > > in osm, platform is where people wait to take the train. > > people always are "somewhere" before taking the train. > > osm platform <> irl plateform > > Do you mean `public_transport=platform` [^1], `railway=platform` [^2] or > both? > > If `railway=platform` means the same as `public_transport=platform`, > then the wiki page about `railway=platform` needs an update, because > it currently reads 'a railway platform'. > > [^1]: <https://wiki.openstreetmap.org/wiki/Tag:public_transport%3Dplatform > > > [^2]: <https://wiki.openstreetmap.org/wiki/Tag:railway%3Dplatform> > > > > how can we know whether there is a platform? > > > > by geometry. if it's a way, it is a "real" plaform. > > if not, it's unknown. > > 'Unknown' means we don't know anything. If `railway=platform` really > is identical to `public_transport=platform` this would mean that there > is no way to define that there is no platform. > > > maybe a better value should be "embarkation point" but it's "too late" > > to change a so common value. > > Why not just 'stop'? > > It's never too late to correct a mistake ... > > > On 20 February 2018 at 22:11, marc marc <marc_marc_...@hotmail.com> wrote: > > Le 20. 02. 18 à 21:50, Selfish Seahorse a écrit : > >> On 20 February 2018 at 21:24, marc marc <marc_marc_...@hotmail.com> > wrote: > >>> Le 20. 02. 18 à 21:17, Selfish Seahorse a écrit : > >>>> If no one objects, I'd like to change the wiki page [^1] so that > >>>> `railway=platform` should not be used on nodes. > >>> > >>> I objets and request to do the opposite : > >>> remove the "forbiden" node for railway=platform > >>> > >>> in almost all osm objects, it makes sense to use a node if > >>> you don't know the precise geometry or if the object has > >>> a small geometry > >>> or > >>> allow to use a way when a more precise geometry is desired. > >> > >> I'm sorry, I wasn't precise: I'd like to change the wiki page so that > >> `railway=platform` should not be mandatory for tram stops without > >> platform. > > > > in osm, platform is where people wait to take the train. > > people always are "somewhere" before taking the train. > > osm platform <> irl plateform > > maybe a better value should be "embarkation point" but it's "too late" > > to change a so common value. > > > > > how can we know whether there is a platform? > > > > by geometry. if it's a way, it is a "real" plaform. > > if not, it's unknown. > > > > Regards, > > Marc > > _______________________________________________ > > Tagging mailing list > > Tagging@openstreetmap.org > > https://lists.openstreetmap.org/listinfo/tagging > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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