[OSM-newbies] tagging subway lines

[Bernd Raichle]

On Friday, 11 January 2008 22:56:47 -0500,
Eric Brelsford <ebrelsford at gmail.com> writes:
 > Is there a good (common) way to describe which subway lines one can access
 > through a particular station?  For example, I am looking at tagging a
 > station (more specifically, "railway=subway_entrance") in New York.  Its
 > name is "Clinton-Washington Avenues Station" but a rider accesses a subway
 > line called the G through it.  Is there a good tag for describing which line
 > a station is on?

The stations are connected through a way modelling the railway tracks.
You can give "name" to a railway, and it's possible to give all lines
operated on this track using a set of "line=<line>" or one
"lines=<line>,<line>,.." tag.  This tag is not documented on the Wiki,
thus you should write a proposal for this new feature.


 > The best I've come up with looking on the wiki, might be a Relation, Route,
 > over all of the stations on that line.
 > 
 > This really crucial for giving directions for a route that is partially
 > underground.  Any suggestions?

A routing software can use the tags on the rail-ways to propose the
best connection and to give appropiate directions.  Additional tags
for the station are not necessary.


Best wishes,
  -bernd