Rendez-vous
Where should a group meet? Rendez-vous takes each person's starting point and how they travel
(walking, cycling, driving, public transport), and proposes the bars, restaurants or stations of the
Toulouse area that are the fastest to reach for everyone, for an arrival within a chosen 15-minute slot.
Try it: rendez-vous.gresset-bourgeois.fr (French
interface, Toulouse area only). A project by Nicolas Gresset-Bourgeois.
How it works
- Candidates: a few places of the chosen kinds around the participants' weighted barycenter,
taken from a local database of about 17,400 Toulouse places built from OpenStreetMap and the
Tisséo GTFS feed.
- Travel times: walking, cycling and driving times from
openrouteservice (one matrix request per mode), public transport journeys
for the arrival slot from Transitous or, optionally, the Tisséo API.
- Score: the group's total travel time, or the mean plus the gap between the longest and the
shortest trip; the 3 best places are shown with each person's journey, step by step.
Everything runs in the browser: there is no backend, and the API keys (openrouteservice is free,
Tisséo optional) are the visitor's own, stored in their browser only. Addresses are completed
instantly from the local database, then by the French IGN Géoplateforme.
The full pipeline, with diagrams, API calls, quotas and data sources, is in
docs/pipeline.md.
Status
A working prototype. Next steps: spreading the candidates out (today two may stand 50 m apart), a
better meeting point than the barycenter (a weighted geometric median), and in the longer run a
home-made routing engine (Dijkstra for the streets, Connection Scan or RAPTOR for public transport)
served from a home server, to score every place exactly instead of a short list.
Running it locally
No build step, no dependency: vanilla HTML, CSS and JavaScript modules, with
Leaflet served from assets/vendor/.
node scripts/dev-server.js # http://localhost:3001
The dev server applies the clean URLs and the Content-Security-Policy of vercel.json. An
openrouteservice key is needed as soon as someone walks, cycles or drives.
Development scripts (not deployed):
scripts/location-fixture.js shot: replays a recorded computation in headless Firefox, without any
API call, and screenshots the results (scripts/firefox-bidi.js drives Firefox).scripts/search-queries.js [query…]: rankings of the local address search for reference queries.scripts/regenerate-places.sh: rebuilds data/pois-toulouse.json from scratch (downloads, osmium,
scripts/build-places.js).
Layout
index.html, legal.html the tool, and its legal notice and privacy page
js/ engine.js (candidates, scoring), ors.js, transitous.js, tisseo.js (routing),
search.js (address search), main.js, map.js, results.js, slots.js (interface)
css/ base.css (shared), rendez-vous.css, legal.css, fonts.css
data/ pois-toulouse.json (places), tisseo-area.json (build input), README.md (sources)
docs/pipeline.md how a computation runs, end to end
scripts/ dev server, browser tests, places build
Privacy
No account, no cookies, no analytics. The browser sends the participants' positions to the routing
services listed above, and what is typed in an address field to the IGN Géoplateforme; details in
legal.html.
Licences
- Code: MIT.
data/pois-toulouse.json: ODbL 1.0, derived from
© OpenStreetMap contributors and © Tisséo data, with addresses from the Base Adresse Nationale
(see data/README.md).- Fonts DM Sans and Space Mono: SIL Open Font License (
assets/fonts/); Leaflet: BSD 2-Clause
(assets/vendor/leaflet/LICENSE).
