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this post was submitted on 04 May 2026
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I can't tell from their site -- are they using a service like GraphHopper or Valhalla for routing, or have they rolled their own? If they're doing a limited amount of public transport routing, fuel efficiency calculations, etc, I guess it's the latter?
The project is open source: https://codeberg.org/cartes
They combine a bunch of different services and list them all out here (unless you speak french, you'll want to translate the page): https://cartes.app/verso
Looks like they're using Valhalla for routing as well as MOTIS/Transitious, Node-GTFS, GRAZE, and Transport.data.
Thanks! I was wondering whether I'd get any benefit from their routing versus GraphHopper's web UI; sounds like right now, that'll just be in parts of France.