On 01/28/2011 09:05 AM, Dominik Mahrer (Teddy) wrote:
On 27.01.2011 22:06, Michael von Glasow wrote:
You can find the proposal at:
http://wiki.openstreetmap.org/wiki/Proposed_features/Simplified_Public_Transport_Scheme
Constructive feedback and suggestions are welcome and can be sent to the
list or left on the proposal's discussion page.
It seams to me, this proposal is a sipmlified version of my proposal
with the following key features:
[...]
So I do not see a real benefit of this proposal...
I did not specifically look at the proposal you made but rather
documented the essentials of how we've been doing things in Italy -
personally, I have used this scheme since mid-2010. I don't claim to
have invented this - I looked around at what seemed to be the most
common and simple approach, including the work Tiziano had already done
in Padova, experimented with various renderers and drew up what I found.
If you started out in a similar manner, this probably explains the
similarities.
If that results in both proposals being similar, I consider it a good
thing, since we should easily be able to agree on the basics, with only
minor details left to be discussed.
Suggestion: let us first focus on the basics, discuss the details which
need to be worked out and make that small set of features official. Then
we can move on and tackle the more complicated cases, one at a time.
That will help us discuss issues one small set at a time - it's easier
to keep the discussion focused that way.
One thing that can not be represented: If a tram stop is also a
light_rail stop. In Zurich we have several stops they are both at the
same time.
Well, that's one of the special cases, so I'd save that for a future
amendment. Off the top of my head, I can think of two possible ways to
cope with this:
a) Add an extra tag (light_rail=yes or similar)
b) Decide on the *primary* characteristic: Tram stops typically have
platforms just above street level and pedestrian crossings at level.
Light railway stations typically have elevated platforms and
over/underpasses to reach platforms, crossing the tracks is prohibited.
Decide which best describes the stop in question and use that; the fact
that it is served by two different systems could then be determined by
examining route relations.
But again, let's save that for the next step. For now, I would suggest
tagging these cases in any way that can be easily identified and does
not collide with approved tags.
And one thing I'm not sure if it is a good idea: to redefine
railway=halt/railway=tram_stop to beside the way. I personally would
not try to redefine a well known tag.
I'm open to discussing that; however, looking at [1] (the whole page, in
fact), it seems that it was once accepted practice to place bus stops
into the way, which was changed later (and I have found quite a few
stops in the middle of the way). Doing the same with tram stops would be
consistent - especially considering combined tram/bus stops (not unheard
of), where otherwise I'd put one node in the middle of the way and
another one beside it, for what is essentially a single feature.
[1]
http://wiki.openstreetmap.org/wiki/Talk:Tag:highway%3Dbus_stop#User:Achadwick_-_older_tagging_scheme
Michael
_______________________________________________
Talk-transit mailing list
[email protected]
http://lists.openstreetmap.org/listinfo/talk-transit
