[Tagging] Public Transport Timetables

Jonathon Rossi jono at jonorossi.com
Wed Nov 7 13:35:33 UTC 2018

I've been following along the few threads to better understand this topic,
however I'm still feeling that mapping complex timetables is a bit like
mapping the full menu of a cafe or restaurant, or the room options at a
hotel. These things vary whenever the service business chooses and it is
close to impossible to keep it up to date.

In Brisbane Australia, some PT timetables vary often especially with public
holidays (local, state or federal), school holidays (which differ between
schools) and especially with special events (sporting, concerts, etc).
Sometimes timetables get more trips sometimes less, it can be quite
variable throughout the year and not something that can be 100% codified
into timetable rules, and obviously not known too far in advance.

I appreciate that timetables are very useful for consumers of maps, and
understand that in some cities timetables can be reverse engineered by
being somewhat observable (I would think copying a full timetable off a
sign would classify as an import), however are we concerned that this adds
a massive burden to maintain this data in OSM and it is very likely to
always be out of date? If it is always going to be out of date will any app
developer even integrate this data into their app when they can use GTFS
feeds? The proposal refers to MAPS.ME and OsmAnd, have the developers of
either application been consulted?

Having this data embedded in the OSM tags also forces apps to reduce their
map cache duration to try to get more updated timetables.

I'm not very experienced with PT in OSM, but I'd have thought improving the
tags for mapping objects to GTFS feeds, including the GTFS endpoints and
license info as tags, and maybe then adding the ability to discover the
GTFS Realtime extension would be the way to go. I think this would give
much more power to app developers. It does overlap a little with
Transitland, but obviously OSM wouldn't be polling or hosting the feeds,
that would be up to an application developer.

Happy to hear any feedback if I've missed the point of this.

On Tue, Nov 6, 2018 at 2:07 AM Jo <winfixit at gmail.com> wrote:

> Hi Leif,
> You made me do it! :-) I sort of stole your proposal and started creating
> a new one. It differs in rather important ways from your proposal, so I
> preferred not modifying your wiki page. I also think it's important to
> decouple the (voting for a) full timetable solution from the solution where
> tags are added to indicate interval during 'opening_hours' or a route,
> which is a lot more likely to be accepted.
> So here goes:
> https://wiki.openstreetmap.org/wiki/Proposed_features/Public_transport_timetables
> Please let me know what you think. What I still haven't figured out yet is
> how to differ weekdays that fall in school holiday periods from "normal"
> weekdays. So work in progress.
> Polyglot
> _______________________________________________
> Tagging mailing list
> Tagging at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/tagging

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