[Talk-GB] Conflicting tagging of london undergound stations

Nick Black nickblack1 at gmail.com
Wed Sep 19 23:32:24 BST 2007


On 9/19/07, Robert (Jamie) Munro <rjmunro at arjam.net> wrote:
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> Nick Black wrote:
> > On 9/19/07, Tom Hughes <tom at compton.nu> wrote:
> >>
> >> It should be railway=subway of course, not railway=rail.
> >
> > Not if the line isn't subterranean.
>
> I think that the whole underground system should be railway=subway, and
> for clarity, tunnel=yes or tunnel=no should always also be used. I guess
> the default assumption by renderers could be tunnel=yes, but I'm not sure.
>
> The reason is that if a renderer had a style for Subway stations, and
> another style for long distance rail, the whole underground should be
> shown as subway stations, not differently for different stations.

I agree with the outcome, but not the reasoning.  I think its a
mistake to justify tagging by the outcome of rendering.  The
introduction of Mapnik and the proliferation of the Osmarender have
done a lot to encourage standards within tagging - but we need to look
beyond rendering.  If I want to select all of the ways that belong to
the london underground system, its not particularly straightforward.
>From this point of view, the values of k=v are not significant - its
the real-world representation of the objects they represent that
matters.

>
> Robert (Jamie) Munro
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-- 
Nick Black
--------------------------------
http://www.blacksworld.net




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