[Talk-transit] Modelling complex stations

[Peter J Stoner]

In message <1350f7a40902260245l31fbfe88jc05af7faef79b8e5 at mail.gmail.co 
m>
          Frankie Roberto <frankie at frankieroberto.com> wrote:

> On Thu, Feb 26, 2009 at 10:21 AM, Peter Miller
> <peter.miller at itoworld.com>wrote:


>> I do think we need to spend a bit more time bottoming this out at this
>> stage before coding lots of interchanges. As we are aware the professional
>> community has also looked at these same issues and we can learn from them
>> and borrow from them as appropriate.
>>
>> With railways the decision seems to be to have a way per track and then use
>> relations to bind these together for some rendering styles. This same
>> approach can be used for dual carriageways and complex junctions, even
>> though no one has actually done such a rendering to my knowledge.
>>

> Ah, that's a nice method - I hadn't considered that option. It fits nicely
> with how bridges are beginning to be mapped with relations too. (though I
> haven't seen how renderers use this information yet).

> I'm also going to have to use the relation method for a few trams near me,
> as the roads are set up so that one side of the road is tram-only
> (railway=tram, oneway=yes), but the other side is also open to road traffic
> (highway=unclassified, tram=yes, oneway=yes), sometimes buses and taxis only
> (highway=unclassified, tram=yes, oneway=yes, bus=yes, taxi=yes,
> motorcar=no). This looks a complete mess in renderers at the moment (see
> http://www.openstreetmap.org/?lat=53.478996&lon=-2.241334&zoom=18&laye
> rs=B000FTF
> ).


>> Knowing what I do about train enthusiasts and public transport enthusiasts
>> I think we are going to end up with every set of tracks and points in the
>> entire world in OSM! We might start with a single way through a station and
>> ignore the fact that there are three platforms and six or more actual sets
>> of tracks, but the coding will get more and more detailed as more fanatical
>> people get hold of it!
>>

> Indeed - I've started to do a few stations near me. One of the unsolved
> problems (to my mind), is how to add platforms numbers. ref=* has been
> suggested, but most island platforms usually have a different number for
> each side of the platform (sometimes even splitting the sides up as 1a, 1b,
> etc). See discussion here:
> http://wiki.openstreetmap.org/wiki/Talk:Proposed_features/unified_stop
> area#Sheffield


There are some more ways that platforms are divided up:

On the West Coast main line there are coloured zones, eg Gold Zone, 
Purple Zone etc.

National Express have tied laminated A4 signs to the lamp posts "Board 
here for Coach x"   - the problem with this is that this detail is 
company and train type specific.

The Japaneze use the position on the platform to suggest where to 
board in relation to the exit at the destination station.  (see 
www.navitime.com - for the London Underground)

I believe Ifopt has something to say about this but am not up on the 
detail.



-- 
Peter J Stoner
UK Regional Coordinator
Traveline                       www.travelinedata.org.uk

a trading name of
Intelligent Travel Solutions Ltd  company number 3826797
Drury House, 34-43 Russell Street, LONDON WC2B 5HA