-------- Original Message -------- Subject: Re: [Talk-GB] Conflicting tagging of london undergound stations Date: Fri, 21 Sep 2007 08:13:30 +0100 From: Mark Williams <[EMAIL PROTECTED]> To: Robert (Jamie) Munro <[EMAIL PROTECTED]> References: <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]>
Robert (Jamie) Munro wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Alex Mauer wrote: > >> I'm assuming that the vast majority of railway=subway in the world is >> below ground, >> > > You're assuming wrong. Only 45% of the London Underground is actually > tunnels. The other 55% is above ground. I expect other cities are similar. > > >> and therefore that requiring an additional tunnel=yes tag >> on 90% or more of the subway ways, is not as good as treating the >> below-ground portions as a lower layer (whether it's -1 or -2 or -10000 >> is beside the point) >> > > It might be better to abolish rail=subway and just use rail=metro. It's > then obvious that you only put tunnel=yes when it is in a tunnel. > > Robert (Jamie) Munro > > For what it's worth, London underground is of course on many layers - to some extent, each line wants a different layer tag as they cross at varying depths. OTOH I'm not sure how relevant it is, as the layer tag is largely for rendering & how important is it to render the levels right on a map? I personally would want it right, because it's there. Both tunnel & layer have their place, I would agree with the idea of the default for rail=subway/metro being tunnel=yes, even for London at 45% correct! I think I'd default layer as -3 though as not much goes under the Tube, but covered rivers go above it & I bet they're all -1 at least. Mark _______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-gb
