| Re: some understanding questions: cross section & stations & stopping points [message #150 is a reply to message #147] |
Wed, 16 March 2005 13:58  |
Matthias Hengartner
Messages: 57
Registered: August 2003
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Member |
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Hello,
sorry for not giving an answer earlier...
>> 1.crossSection
>> What is meant with this element?
>
> I would guess that this element descibes a passenger crossing in a
> station. Or other possibility: this describes the exact middle of a
> station (in German: "Bahnhofsmitte") which is a reference point for
> things like mileage, borders, etc.
>
> Furthermore, in German there is the word "Bahnhofsquerschnitt" which is
> closest translation to "crossSection". AFAIK this "Bahnhofsquerschnitt"
> has a certain operational meaning, but I don't remember what it is. And
> neither Prof. Pachl's glossary nor allmighty google could answer that
> question. But perhaps I'm just wrong...
>
> Can anyone please rectify or falsify my assumptions? Thanks!
Yes, crossSection means Bahnhofsquerschnitt/Stationsquerschnitt. ASAIK, it
don't has to be exactly in the middle of a station. I think, it is a logical
assignement of a track to an station and has no physical meaning.
>
>> 2.stations
>> When I want to create a station on a track so i have to use the ocp's
and
>> its attributes!?
>
> Yes.
Yes, and you can assign the track(s) to the OCP via crossSection(s).
>> But how can I indicate that the station has a length, and
>> is not only a point?
>
> Well, "ocp" just introduces a station. It's more or less a declaration
> ("There is thing called ABCD").
--> see also discussions about a <stations>-scheme.
> And now it's time for some nitpicking:
>
> <nitpick>
> The "length of a station" (that's what you asked for) is given
> implicitly by the distance between it's entry signals. This information
> can be derived from the existing railML-scheme.
hmm, yes. And for an _explicit_ indication of a station-area, the element
<border> (type="station") can be used.
Furthermore some (most) track elements (in particular switches, signals,
balises, etc.) will assignable to an OCP-area, at the latest when the
interlocking schema becomes newsworthy.
Best regards from sunny Zurich B-)
Matthias Hengartner
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Matthias Hengartner
IVT ETH Zürich
hengartner(at)ivtbaugethzch
++ 41 1 633 68 16
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