Waylight — License and Data Attribution
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This repository contains two legally distinct things: Waylight's own
application source code, and a derivative database built from third-party
open map and open-government data. They are licensed differently.

1. Application source code
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Copyright (c) 2026 the Waylight project. All rights reserved.

Unless a specific file states otherwise, the application source code in this
repository (everything under `src/`, `apps/*/src/`, `api/`, and build/tooling
scripts) is proprietary. No license to use, copy, modify, or redistribute it
is granted. This will be revisited once Waylight's legal entity is formed;
see `legal/terms.html` for the current operating status.

2. Map and comfort-graph data — Open Database License (ODbL)
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The city comfort-graph packs shipped in `public/data/cities/*.wlcp` (and the
intermediate layers under `data/cities/*/`) are built from:

  - OpenStreetMap data, © OpenStreetMap contributors, available under the
    Open Database License (ODbL) v1.0 — https://opendatacommons.org/licenses/odbl/1-0/
  - In select cities, municipal open-data lighting inventories — see
    `data/municipal-sources.json` for the exact source, licence, and fetch
    date for every one currently ingested.

Under ODbL §4.4, a database produced by combining or processing the
Licensed Database (OpenStreetMap) constitutes a "Derivative Database," and
distributing it requires:

  - Attribution: this data is © OpenStreetMap contributors,
    https://www.openstreetmap.org/copyright — Waylight credits this in-app
    (map attribution control, Help & data sources page) and here.
  - Share-Alike: if you obtain a copy of Waylight's comfort-graph packs and
    produce your own Derivative Database or Produced Work from them, ODbL
    §4.4 requires you to offer that Derivative Database under the same ODbL
    terms (a "Produced Work" — e.g. a rendered map image, or Waylight's own
    displayed routes and scores — does not itself have to be ODbL-licensed,
    per ODbL §4.6, but a redistributed derivative *database* does).
  - Keep open: per ODbL §4.5, if you redistribute the Derivative Database,
    it must remain available under ODbL and not be locked behind additional
    technical restrictions that prevent the rights this license grants.

Municipal sources with a more restrictive licence than ODbL are ingested
only when that licence permits it (see `data/municipal-sources.json` —
sources requiring non-commercial-only or no-derivatives use are excluded
outright, not worked around). Where a municipal source requires its own
specific attribution (e.g. Sevilla's lighting data, CC BY 3.0 ES), that
credit is listed separately in-app under Help & data sources.

3. Third-party service attribution
------------------------------------

Waylight also queries, at request time rather than bundling, the following
services — each under its own terms, credited in-app and in
`legal/privacy.html`:

  - Nominatim & Photon (geocoding) — OpenStreetMap-based
  - OSRM, hosted by FOSSGIS e.V. (routing)
  - CARTO (map tiles) — attribution per https://carto.com/attributions
  - Open-Meteo (weather & elevation) — CC BY 4.0