Meaning of queryDepartures param 'equivs'?

[Holger Bruch]

Hi all,

what exactly is the meaning of NetworkProvider.queryDepartures' boolean parameter equivs, i.e. what is an equivalent station?

If set to true, should all departures of all stops of the requested stop's parent station be returned?

I assume each platform of the parent station/stop cluster should be treated as a proper Location, shouldn't it?

Thx,

Holger

[Andreas Schildbach]

An equivalent station is a station so close to the requested station
that it can be used instead.

Often the main stations are separated into sections (e.g. Munich
north/south or Berlin up/down), and then you also have a Subway stop in
the same building. Those stations are usually equivalent to each other.

(I don't know the exact Hafas definition though.)

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[Holger Bruch]

Ok, thanks. For OpenTripPlanner, that should be all stops in the stop's cluster then.

OTP currently has two alternative options to cluster stops: 'parentStation' (relying on appropriate GTFS data) and 'proximity' (stops closer than 400m and equal name (after some network dependent normalization)).

Should, for a usual bus stop with individual locations for both directions, equiv=false return departures for the requested location or both directions?

[Andreas Schildbach]

On 08/01/2018 12:04 PM, Holger Bruch wrote:
> Ok, thanks. For OpenTripPlanner, that should be all stops in the stop's
> cluster then.
>
> OTP currently has two alternative options to cluster stops:
> 'parentStation' (relying on appropriate GTFS data) and 'proximity

> <https://github.com/opentripplanner/OpenTripPlanner/blob/1fbcee8f1e62d3be61d127a8e7a92c5a376b8b0c/src/main/java/org/opentripplanner/routing/graph/GraphIndex.java#L581>'

> (stops closer than 400m and equal name (after some network dependent
> normalization)).
>
> Should, for a usual bus stop with individual locations for both
> directions, equiv=false return departures for the requested location or
> both directions?

Equivs (in the Hafas meaning) doesn't cover single stations/stops with
multiple (usually 2) masts. So equiv true or false wouldn't make any
difference.