[Talk-transit] Public transport workshop in Germany

Peter Miller peter.miller at itoworld.com
Mon Jun 1 09:47:00 BST 2009

On 1 Jun 2009, at 08:41, Roger Slevin wrote:

> Google take a feed of NaPTAN stop point data – and hence something  
> like Piccadilly Gardens in Manchester is a mass of them.
> NaPTAN does have the facility to hold stoparea data – but the data  
> is not fully populated (as it is not useful when presenting journey  
> itineraries to the public – or local information systems have their  
> own way of creating such stopareas on the fly without requiring the  
> data to be held explicitly in NaPTAN records).
> We did experiment with using stopareas with Google – but the need to  
> link the data to Google Transit for specific journey planning meant  
> that you were told to catch a  bus at, say, Piccadilly Gardens –  
> rather than from stop 10 at Piccadilly Gardens ... and for  
> itineraries to be useful, the “stop 10” bit is quite important!

Interesting. Fyi, I have up-loaded images from a couple of places in  
the UK where Stop Areas/Stop Places are used. Notice that in some  
places there are nested stop places. For our purposes we can consider  
Stop Place and Stop Area to be referring to the same thing, however  
the correct technical term in CEN for the stuff on the ground is a  
Stop Place.



There are times when the hierarchy is useful - for example one might  
first ask to go from Manchester to London, and then be offered routes  
from Manchester Piccadilly or Manchester Oxford Road to London  
Victoria Coach Station or London Euston, and then finally when one has  
chosen the actual journey one might be told to use Platform 10 from  
Manchester Piccadilly Railway Station. Similarly for large bus/coach  
interchanges. For some bus/coach/rail interchanges one doesn't  
actually know which Access will be used until shortly before the  
vehicle departs so one can only give the station itself as the  
starting point.

I do think that if we should accommodate this richer information where  
it is available and where people want to built it and then people will  
start using it for creative things, such as reducing the clutter on  
zoomed out maps (Google just ignores bus stops as one zooms out to  
stop it getting unmanageable, something which would not be ok for  a  
bus-centric map).

We could also consider using tools to automatically build stop places  
and associate Accesses with Stopping Places to stop it being too  
complicated for mappers.



> Roger
> From: talk-transit-bounces at openstreetmap.org [mailto:talk-transit-bounces at openstreetmap.org 
> ] On Behalf Of Frankie Roberto
> Sent: 01 June 2009 08:34
> To: talk-transit at openstreetmap.org
> Subject: Re: [Talk-transit] Public transport workshop in Germany
> On Mon, Jun 1, 2009 at 8:05 AM, Peter Miller <peter.miller at itoworld.com 
> > wrote:
> > The current situation with bus stops is more messy. (Just see
> > Birmigham which seems to entirely consist of bus stops.) While
> > stop places in the new schema allow to clean this up a bit, again,
> > the renderer only has the choice to either paint two many
> > symbols (all access points or all stopping points) or badly
> > guess where to put the single point.
> Which rendering view are you using? for the main Mapnik view on
> openstreetmap there are no bus stops until one zooms in to zoom 17 at
> which point there are certainly lots of bus stops (accesses).
> It's good to see that we're not the only ones with this problem,  
> though.  Google Maps seems to render a huge number of bus stops now  
> that they've imported public transit data for the uk. See http://www.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=manchester,+uk&sll=37.579413,-95.712891&sspn=30.958234,75.234375&ie=UTF8&ll=53.479797,-2.239387&spn=0.005708,0.018368&z=16 
>  for instance.
> That view contains two bus stations (by Piccadilly Gardens and the  
> coach station by Chorlton Street), and yet both a rendered simply as  
> a mass of access points, rather than a singular named node (which  
> would be more useful).
> So if we can solve this problem, we'll be one up on Google! :-)
> Frankie
> P.S It's good to see that platforms are now rendering on Mapnik (see http://www.openstreetmap.org/?lat=53.477811&lon=-2.243247&zoom=18&layers=B000FTF) 
> , however I note that it's not coping well with platforms that are  
> areas (as closed ways with area=yes).  Having blue arrows on the  
> tramlines that are marked with oneway=yes is also a little odd.
> -- 
> Frankie Roberto
> Experience Designer, Rattle
> 0114 2706977
> http://www.rattlecentral.com
> Sent from Manchester, Greater Manchester, United Kingdom
> _______________________________________________
> Talk-transit mailing list
> Talk-transit at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/talk-transit

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