Third-party notices

Watershed is built on open data and open-source software. Each item below is used under its own licence, which governs that item.

Data

| Data | Source | Licence |

| ----------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

| Elevation and bathymetry | AWS Terrain Tiles (Mapzen terrarium: SRTM, GMTED2010, ETOPO1 and others) | Open data; see <https://registry.opendata.aws/terrain-tiles/> |

| Satellite imagery | Mapbox Satellite, MapTiler Satellite, or Sentinel-2 cloudless by EOX IT Services GmbH (contains modified Copernicus Sentinel data), as shown in the map attribution | Provider terms. This build uses Mapbox Satellite, shown with the Mapbox wordmark and text attribution as its terms require. The EOX layer (CC BY-NC-SA 4.0) is a keyless fallback for non-commercial builds only. |

| Street map, fonts, sprites | OpenFreeMap · OpenMapTiles · © OpenStreetMap contributors | ODbL (data), BSD (OpenMapTiles schema) |

| Historic sites, lakes, rivers, springs, wells | OpenStreetMap contributors via Overpass API | ODbL |

| Historical political boundaries | historical-basemaps by Andrei Ourednik, simplified with mapshaper; shipped as separate data files in public/borders/ | GPL-3.0 (see public/borders/LICENSE) |

| World coastline (ocean vs. inland valleys for journeys) | Natural Earth 1:10m Physical Vectors, simplified with mapshaper; shipped in public/coastline/ ("Made with Natural Earth") | Public domain (see public/coastline/ATTRIBUTION.md) |

| Curated archaeology (mustatils, tomb roads, rock-art atlas) | Compiled by the Publisher from published papers and UNESCO/Wikipedia geodata; each pin links its source | Facts; text © Publisher |

| Historical city names, peoples, routes | Compiled by the Publisher | © Publisher, simplified for education |

Software

| Component | Licence |

| ------------------------------------------------------------------------------------------ | ------------------------- |

| MapLibre GL JS | BSD-3-Clause |

| Terra Draw, terra-draw-maplibre-gl-adapter | MIT |

| Turf.js | MIT |

| React, React DOM | MIT |

| Tauri (desktop shell), tauri-plugin-dialog, tauri-plugin-single-instance, tauri-plugin-log | MIT / Apache-2.0 |

| Vite (build), TypeScript | MIT / Apache-2.0 |

| Noto Sans (fonts served by OpenFreeMap) | SIL Open Font License 1.1 |

| Segoe UI Historic (used once, to render the icon's cuneiform) | Microsoft, system font |

Full licence texts for the npm packages are in node_modules/<package>/LICENSE in the source repository.