[Talk-transit] Modelling complex stations

[Shaun McDonald]

On 26 Feb 2009, at 10:51, Peter J Stoner wrote:

> 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.

If this information is permanent signage then I don't see any reason  
for this information to not be added to the map.

>
> 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)

That would be quite neat.

Shaun

>
> 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
>
>
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