[Tagging] public_transport=platform rendering on osm-carto

osm.tagging at thorsten.engler.id.au osm.tagging at thorsten.engler.id.au
Wed Jun 20 16:28:22 UTC 2018

>From my reading of the wiki (I wasn’t involved when PTv2 was designed), the situation as envisioned in PTv2 would be that you have only one node, way, or area with public_transport=platform. So the existing highway=bus_stop and highway=platform (in cases where both are present) are merged into a single public_transport=platform (on the way or area that currently is the highway=platform, and the highway=bus_stop goes away completely).


But this requires proper rendering support. That is, the way or area should be rendered like highway=platform was, AND it should render an icon in the middle of the way like highway=bus_stop did. Because public_transport=platform replaces both of these.


Trying to see and implement public_transport=platform only as a 1:1 replacement for existing highway=platform and/or railway=platform is going to make the situation worse, not better.


From: Jo <winfixit at gmail.com> 
Sent: Thursday, 21 June 2018 01:45
To: Tag discussion, strategy and related tools <tagging at openstreetmap.org>
Subject: Re: [Tagging] public_transport=platform rendering on osm-carto


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 next to the ways in combination with highway=bus_stop or railway=tram_stop.


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.


In other words, the rendering of *=platform on WAYS is just fine as it is.





Op wo 20 jun. 2018 om 17:02 schreef Daniel Koć <daniel at koć.pl <mailto:daniel at ko%C4%87.pl> >:

W dniu 19.06.2018 o 17:40, osm.tagging at thorsten.engler.id.au <mailto:osm.tagging at thorsten.engler.id.au>  pisze:
> But I do not think that it is reasonable to add rendering for it, and at the same moment drop rendering for highway=platform, railway=platform, highway=bus_stop, railway=tram_stop and everything else that public_transport=platform is meant to replace.
> This absolutely needs to be a two step process. Add rendering for public_transport=platform first, then let people work on migrating existing data. At some point in the future it might then become possible to drop rendering for existing tags.

I want to make just one step now - replace *=platform with
public_transport=platform. Next steps might be very different and i
don't see them clearly now. It might even need PTv3 - I don't know, so I
won't touch it.

We could of course migrate by adding new type and removing old ones
after some time and I would do it. However on osm-carto we have a strong
opposition to rendering multiple similar tags (fear of fragmentation),
so I prefer to start with announcing the planned change and then make
the switch in rendering. It's just a different way of migration and if
it won't create (unnecessary in this case) tension and makes the whole
thing more probable to happen, I vote for it.

"My method is uncertain/ It's a mess but it's working" [F. Apple]

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