[Tagging] What's the proper way to map multiple rail tracks in a street?

[Cartinus]

On Thursday 24 June 2010 03:48:20 Nathan Edgars II wrote:
> On Wed, Jun 23, 2010 at 9:16 PM, Cartinus <cartinus at xs4all.nl> wrote:
> > On Thursday 24 June 2010 00:18:16 Nathan Edgars II wrote:
> >> On Wed, Jun 23, 2010 at 7:33 AM, Cartinus <cartinus at xs4all.nl> wrote:
> >> > On Wednesday 23 June 2010 11:24:19 Nathan Edgars II wrote:
> >> >> http://www.openstreetmap.org/?lat=39.946466&lon=-75.124744&zoom=18&la
> >> >>yer s=B 000FTF Cooper Street and Delaware Avenue are four-lane roads,
> >> >> with light rail/tram tracks in the outer lanes. Obviously one could
> >> >> simply apply railway=* to the highway, but that would not show the
> >> >> individual tracks. So I drew the tracks in their individual
> >> >> positions, but at high zooms it renders with the tracks completely
> >> >> outside the roadway. It would not be correct to draw two roadways,
> >> >> one in each direction (like on 4th Street to the east), since, unlike
> >> >> 4th Street, these are single carriageways.
> >> >
> >> > I would use:
> >> > railway=*
> >> > tracks=2
> >>
> >> Except that then you don't have the individual positions of the tracks.
> >
> > You have to choose between simple modelling (like a multi-lane road is a
> > single line) or high accuracy mapping (map each track exactly where it
> > is) else you get a mess with high zoom rendering. This is the problem you
> > yourself saw in your first post in this thread. So the "solution" is
> > simple: pick one option. I told you which one I would pick. Simple not?
>
> That doesn't make sense. A multilane road is a continuous paved area,
> while rail tracks are separate, like a dual carriageway road. You can
> move continuously between lanes of a road (including to the other side
> if you U-turn), but trains can only switch tracks at crossovers.
>
> And yet there are traffic rules, so mapping the street as an area is
> probably not the correct solution.

Yes, it does make sense: I told you you had to make a choice between a simple 
model or a complex one. Obviously you don't like the simple one. So now you 
have to design a complex one for the multi-lane road and convince other 
people to map in the same way. Good luck.


-- 
m.v.g.,
Cartinus