[Talk-GB] London Tube Tagging Problems

[Derick Rethans]

On Sat, 9 Mar 2013, James Churchman wrote:

> I am not sure that two nodes really does make sense when both tagged
> as stations? Having two nodes makes sense for sure, but both tagged as
> stations? are they really just not different buildings, entrances,
> lines or platforms of the same station that are more than a small
> distance apart .. being two physically different building does not
> necessarily make them a separate station ? :-)

In the case of Edgeware Road they are really different stations, 
serving different lines, no underground passage and a really busy 
road in between. It's a bit same for the three named West Hampstead.

> > AFAIK, the idea was as follows:
> >
> > station
> > =======
> >
> > The whole area with buildings and platforms:
> >  - area:
> >    - railway=station
> >    - area=yes
> >
> >      - alt_name=Edgeware Road
> >      - name=Edgware Road (Bakerloo)
> >    - or:
> >      - name=Hampstead Heath
> >
> >    - network=London Overground
> >    - naptan:ActoCode=9f8798
> >    ...
> >
> This looks good and seems ideal, tho is not quite per the wiki.. i
> think the wiki still prefers a single node tagged as a
> railway:"station" for the benefit of placing the name correctly ( and
> maybe for the simplification of all stations having a single Node ?
> maybe maybe not )

I don't tag for the renderer...

> > station's building
> > ==================
> >
> >  - area:
> >    - building=station
> >  or
> >
> > If there is no station area or building:
> >
> > - node:
> >   - railway=station
> >   - all the tags from "station"
> >
> 
> This looks good too, tho not what's folowed, many single buildings are
> tagged as an entire railway=station with no area for stations it seems

It's sometimes difficult to see/know if an area makes sense. For most 
tube stations (like the one in Kilburn) the area is exactly the station 
building, having an extra area then makes little sense...

> 
> > platforms
> > =========
> >
> > way (or area): railway=platform, ref=<nr>
> >
> > Where the train stops:
> >
> > - railway=halt (on the railway track itself as a node)
> > - name=Kilburn Park
> > - line=Bakerloo
> > - network=London Underground
> 
> looks great .. tho still not quite sure of the difference between a
> "halt" and a "stop" a "stop_position" etc.. mostly seem to be used
> interchangeably and in reality interchangeably with a "platform" etc..

well, platform is the physical platform. A train can't be one one (but 
pedestrians can). Whether it's halt, stop or stop_position I don't know. 
To be fair, I don't think "halt" is the best choice.

> > station entrances
> > =================
> >
> > - station building entrance: building=entrance
> > - tube: railway=subway_entrance, name="Exit <nr>", ref=<nr>
> 
> This looks great.. but in most (/all) cases i have looked not
> followed; instead if there are multiple exits each is wrongly tagged
> as a station, and as often there is no single station visible in the
> real world (its all underground) there is then no single node for the
> station.

Oxford Circus is done like this (and it wasn't me!)

> > http://www.openstreetmap.org/?lat=51.555173&lon=-0.165321&zoom=20
>
> Hampstead Heath looks excellently done from my now current
> understanding, with the area marked as a station

It doesn't render well though... the station area should be more of a 
landuse pastelly colour instead of the same colour as a station building 
IMO.

> ( tho i still think the wiki implies having a single node as the 
> station :-) ) the platforms individually marked ( as platforms ) and 
> the stops as railway:"halt" ( & "Kilburn High Road" looks similarly 
> done and good)

cheers,
Derick