[Talk-transit] London Bridge

Peter Miller peter.miller at itoworld.com
Fri Sep 18 17:42:01 BST 2009

On 18 Sep 2009, at 15:40, Thomas Wood wrote:

> I've been pondering micro-mapping the carstop signs to mark where the
> front of the train stops.
> Indeed, I tried to collect this info for Wimbledon, but the GPS there
> was too poor also.

Sounds good.

How about the following:-

A railway=stop node for the point on the track where the front of the  
train should stop.

Using railway=platform (linear way) for each platform (parallel to the  

Then a platform=boarding_point node for each car-stop sign on the  
platform way with the carriage number - possibly multiple ones per  

We then have enough information for people to play trains!

If the station has multiple levels then each element should have a  
layer tag and we will need to consider how one manages a single level  
(concourse) where one side has a level entrance to the outside world  
layer=0? and the other side is up a load of steps to the concourse and  
could be considered layer=1 I guess we just choose a set of layers we  
will use and then join them to the outside world with a 'footway' or  
with 'steps'

For a lift we use a node with multiple layer numbers highway=lift?  

I have been trying to capture most of this on the Stop Area proposal -  
not so much a proposal as a description of good practice:-



> 2009/9/18 Peter Childs <pchilds at bcs.org>:
>> 2009/9/18 Frankie Roberto <frankie at frankieroberto.com>:
>>> 2009/9/18 Peter Childs <pchilds at bcs.org>
>>>> Its very difficult as London Bridge is based on about 6 layers with
>>>> random escalators, lifts and ramps connecting it up.
>>>> I'm thinking the building should only cover parts with a roof on  
>>>> and
>>>> hence really needs cutting up.....
>>> Yeah, agree.
>>>> Is there a marker I can put up to say where the trains actually  
>>>> stop
>>>> and that you need to move down the platform.
>>> Ideally, there should a way per railway track, and a way per  
>>> platform (you
>>> can map platforms as areas, but it seems to work better as linear  
>>> ways).  If
>>> there's a way that represents more than one track (eg two tracks  
>>> running
>>> between island platforms, add tracks=2).
>>> Then, make a node on each track to represent where the trains  
>>> stop. There
>>> can be more than one of these if there are a few stopping points (eg
>>> platform 1a, 1b).  Tag this railway=stop.
>>> All of these stopping points, plus the platforms, plus the station  
>>> building,
>>> should then all belong to the station's relation
>>> (http://www.openstreetmap.org/browse/relation/205097) - ideally add
>>> role=stop to the stop nodes.
>> Ok I spouse I need stop markers for different number of carriages.
>> What about the back of the train?
>> Also I guess we are going to need a tag to say "The last set of doors
>> will not open" as the platform is not long enough.
>> Maybe we should have door marks, ie Rather than say the train stops
>> here say where the doors should be; I've seen these marked on the
>> platform in some parts of the world and parts of the Tube have
>> automatic doors fixed to the platform!
>> Peter.
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> -- 
> Regards,
> Thomas Wood
> (Edgemaster)
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