[Talk-transit] Mapping Tram Lines

Shaun McDonald shaun at shaunmcdonald.me.uk
Mon Sep 7 22:43:12 BST 2009

On 7 Sep 2009, at 21:48, Frankie Roberto wrote:

> 2009/9/7 Jerry Clough - OSM <sk53_osm at yahoo.co.uk>
> You're absolutely right. The Phoenix Park & Hucknall services are  
> distinct just sharing the running ways, but co-branded as NET-1. I  
> think some Hucknall line services terminate at Bulwell in the  
> evenings, but that's it in terms of complexity.
> This same issue applies to most of the London Underground tube lines  
> as well - for instance the Central line has a few different  
> branches, but there's only one relation for the whole thing at the  
> moment (see list at http://wiki.openstreetmap.org/wiki/London_Underground_lines 
> )
> Incidentally, I'm not sure whether, in the case of the London  
> Underground and NET1, it's worth also having a relation for the  
> whole 'network'.  This is something I've started to do for some tram  
> networks (eg see the Croydon Tramlink at http://wiki.openstreetmap.org/wiki/United_Kingdom_trams 
> ) but I'm not sure whether it's necessary or not (given that we  
> could just have a network=* tag on the separate relations).

I'd say either use the tags on the relations, or  relations of  
relations, rather than creating another relation for all the ways.

> That said, it is kinda useful to be able to link to one relation for  
> the whole of the Central line, rather than having to  
> programmatically merge two together.

That's what computers are good at! Let them get on with it.


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