[Talk-transit] Modelling complex stations

[Peter Miller]

On 26 Feb 2009, at 09:24, Frankie Roberto wrote:

> Nice find. Digesting now.
>
> One of the problems with the unified stoparea proposal is that it  
> suggests mapping one way per tram/rail track, which currently looks  
> a bit of a mess in the default renderers.
>
> Going forward, we'll have to address this somehow. Either we have a  
> way per track, and leave renderers to somehow figure out how to draw  
> a single line through the middle, or have a way per track except at  
> stations, or have a way per track plus a way down the middle for the  
> 'line' (though this'd be a bit confusing when editing).

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.

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!

And it will be great if they do. It will follow the pattern of OSM  
generally where first people did roads, then major buildings, then  
every building and then addresses for buildings and probably are  
considering mapping every plant in every garden next!

What we need for transport interchanges is a method to do everything  
from the simple overview model where a station is a point feature to  
interchanges that are modelled in great detail.


Regards,


Peter

>
>
> Frankie
>
> On Thu, Feb 26, 2009 at 8:23 AM, Peter Miller <peter.miller at itoworld.com 
> > wrote:
>
> I have been catching up on this great proposal to unify bus/tram/rail
> interchange modelling....
> http://wiki.openstreetmap.org/wiki/Proposed_features/unified_stoparea
>
> Here is a CEN standards document that has lots of great diagrams of
> all sorts of transport interchanges from the very large to very small
> from pages 42 to 66 on this document and proposes how they should be
> modelled by the professional community in the EU. It is a very new
> standard, not yet signed off, that covers everything that NaPTAN does
> not cover.
> http://www.naptan.org.uk/ifopt/
>
> It is worth looking at for ideas about modelling and for suitable
> terminology. The example interchanges would be good resources against
> which to test our proposed modelling against before doing loads of
> coding of actual places.
>
>
>
> Regards,
>
>
>
> Peter
>
>
> _______________________________________________
> Talk-transit mailing list
> Talk-transit at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/talk-transit
>
>
>
> -- 
> Frankie Roberto
> Experience Designer, Rattle
> 0114 2706977
> http://www.rattlecentral.com
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk-transit/attachments/20090226/51d72a61/attachment.html>