Hello Peter:
The California/Rail wiki page you describe documents a couple of
different ways we tag rail. OpenRailwayMap (ORM) documents a three
tier (route=tracks, route=railway, route=train) method used in parts
of Germany. As that page (as well as the USA Rail WikiProject)
explain(s), because of the way TIGER entered rail in the USA, (and
the way we structure and name rail) we often use just two of these,
skipping route=tracks relations and "jumping" right to putting "named
rail" into relations of route=railway: rail "infrastructure." You
might say that two ORM/German-style "lower and middle level"
relations have been merged into a single "middle level" relation here
in the USA. There are also ("higher level," and the whole OSM world
agrees) passenger rail relations: route=train (or route=light_rail,
route=subway, route=tram...effectively at the same logical "level" as
route=train). That's OSM rail "structure" in a nutshell.
In Oregon, there are the Brooklyn Subdivision
(http://www.osm.org/relation/2203588), the Fallbridge Subdivision
(http://www.osm.org/relation/1443651)... these are (correctly) the
middle-level infrastructure relations tagged route=railway. There
are also (predictably, also, the higher-level) route=train passenger
rail relations like Amtrak Cascades
(http://www.osm.org/relation/71428) which are often made up of a
group of Subdivisions (route=railway relations) like Brooklyn and
parts of Fallbridge.
THIS is what Paul was typing about in those Notes. Specifically, a
(higher-level/passenger) route=train relation should not have as its
name=* tag the name of the system (like MAX, BART, Metro or Amtrak),
it should be the name of the passenger line (Green Line, Downtown to
University...). And, the "underlying" (lower-level infrastructure)
route=railway relation should be correctly "named" as the rail
company (or public works department, transit district...) names it:
often something like XYZ Subdivision or ABC Industrial Line.
OSM's Transport Layer is handy to display (rather raw) railway=* and
(at closer zoom levels) route=bus.
ORM is handy to display rail infrastructure (with Infrastructure
radio button selected), especially usage=* tags.
OpenPublicTransportMap (http://openptmap.org) is handy to display
passenger rail relations.
The USA is largely under construction for all of these, but we've
come a long way.
It's all in those wikis. Makes sense?
Regards,
SteveA
California
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