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gods-eye-view/changelog.d/1675-rail-layer.md
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- Add Rail in the Movement group, off by default: live trains from 30 keyless
operator feeds in the United States, Canada, Australia, Ireland, Finland,
Spain, Norway, Malaysia, Japan and France, from commuter and long-distance
rail to the streetcars and trams of Seattle, Cincinnati, Toyama, Bordeaux
and Montpellier. A new `/api/rail` proxy fetches registered feeds only,
needs no key and drops buses from mixed feeds. Every train shown is live:
29 feeds publish GPS positions and Irish Rail its station reports, and 28
of them show with no setup. No train is placed or moved from a timetable;
a feed whose live positions fail shows as unavailable. Packs are an opt-in
extra: `node scripts/build-rail-paths.mjs --feed <id>` (or `--all`) builds
a feed's path and schedule packs into `.cache/rail-paths/`, which add the
operator's own route lines, stop names, the next stop and trip-update
delays to its live trains; Renfe long and medium distance and KTMB, whose
vehicles name no route, appear once their pack is built. Nothing is
downloaded when the app starts, and lines are only ever the operator's own
shapes. Trains are coloured by category (urban, local, regional, national,
international), each with a chip and legend entry shared via token `02`,
glide between reports with Transit's delayed playback, are drawn once when
several feeds carry them, and open a card on click. A selected train that
is moving is followed by the camera, as an aircraft is, and any other is
flown to once; the selected train and its line stay on the map from orbit.
No train is placed in Ukraine. Feeds that publish no licence are used on
the basis each one's entry records, and their credit never presents that
as a licence (Denis Groshev, @ZloyS, #1675).