[Talk-transit] [Spam] Re: Modelling complex stations

[Peter Miller]

On 26 Feb 2009, at 11:25, Christoph Boehme wrote:

>
>
> Peter J Stoner wrote:
>> In message  
>> <1350f7a40902260245l31fbfe88jc05af7faef79b8e5 at mail.gmail.co
>> m>
>>          Frankie Roberto <frankie at frankieroberto.com> wrote:
>>
>>> 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
>
> We could model the whole platform as an area with two additional  
> ways at
> either side of the area polygon to add platform-side specific  
> information.

The IFOPT standard appears to define polygons for what they call Quays  
(called platforms in this discussion) each of which has a name. For  
example an area of platform might contain two 'quays' for 4 and 3 and  
'quay' 4 might also be subdivided into 4a, 4b and 4c.

Figure 4 in the IFOPT document describes what they mean (URL in  
previous post).

Could we do the same? We define a closed way for the main area where  
people can stand and then define children of that using polygons  
again, with an is_in tag?

I am not sure when I will get time to do more on my local station, but  
this what I have for it now (I did most of this a year ago and a  
couple of people have tweeked it since then). Feel free to bring it  
more up-to-date. Having the building defined seems to obsure all the  
platforms inside which is a shame. I have not defined the sub- 
platforms yet but might give that a go soon. Notice that it also  
includes the car parks and paths associated with the station and that  
I invented a 'PT Interchange' relation to try it out - quite happy to  
change that though.
http://www.openstreetmap.org/browse/relation/2522



Regards,


Peter

>
>
>> 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.
>>
> --%<--
>>
>> 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)
>
> A similar system exists for trains in Germany. Each platform is split
> into sections (A to G typically) and a large chart explains for each
> train stopping at the platform in which section each coach comes to
> halt. That's handy if you have reserved seats.
>
> I assumed that the coloured zones on the West Coast main line where  
> used
> for the same thing (with the Gold Zone being the area where first  
> class
> coaches stop :-) )
>
> Christoph
>
>
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