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jubnl
56 lines
2.7 KiB
Markdown
56 lines
2.7 KiB
Markdown
# Third-party data & attributions
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TREK bundles and uses third-party data that requires attribution.
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## geoBoundaries — country & sub-national boundaries
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The Atlas map's administrative boundaries (admin-0 countries and admin-1
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provinces/counties), shipped at `server/assets/atlas/admin0.geojson.gz` and
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`server/assets/atlas/admin1.geojson.gz` and generated by
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`server/scripts/build-atlas-geo.mjs`, are derived from **geoBoundaries**.
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> Runfola, D. et al. (2020) geoBoundaries: A global database of political
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> administrative boundaries. PLoS ONE 15(4): e0231866.
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> https://doi.org/10.1371/journal.pone.0231866
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geoBoundaries is licensed under **CC BY 4.0**
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(https://creativecommons.org/licenses/by/4.0/). Source: https://www.geoboundaries.org/
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The bundled files are simplified (coordinate-quantized) and re-tagged with the
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property names TREK consumes. Country borders (`admin0`) derive from the geoBoundaries
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CGAZ composite; sub-national regions (`admin1`) derive from the per-country open
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(gbOpen) release.
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## OpenStreetMap — geocoding, place details & descriptions
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Atlas reverse-geocodes places via the **Nominatim** service, and place search,
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details and descriptions come from Nominatim and **Overpass**. Data is
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© OpenStreetMap contributors, licensed under the Open Database License (ODbL).
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https://www.openstreetmap.org/copyright
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## Wikimedia Commons & Wikipedia — place pictures & descriptions
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Pictures offered for a place come from **Wikimedia Commons** (geosearch by
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coordinate) and are cached locally rather than hotlinked. Descriptions can come
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from **Wikipedia**, resolved from the place's OpenStreetMap `wikipedia` tag.
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Commons files carry their own licence, most often **CC BY** or **CC BY-SA**. TREK
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shows the author, the licence and a link to the file description page next to
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every picture while it is being chosen, and keeps the author and licence with the
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cached file so the credit stays visible afterwards. Wikipedia article text is
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**CC BY-SA 4.0**. https://commons.wikimedia.org/wiki/Commons:Licensing
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## Google Places — optional place data
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When an administrator configures a Google Maps API key, place search, details,
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pictures and editorial summaries can also come from the **Google Places API**,
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subject to Google's terms. Photos carry the author attribution Google supplies
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and no reusable licence; TREK displays that attribution and claims nothing
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further. This path is off unless a key is configured, and each part of it has its
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own switch in the admin panel. https://cloud.google.com/maps-platform/terms
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## OurAirports — airport reference data
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`server/assets/airports.json` is built from **OurAirports**
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(https://ourairports.com/data/), released into the public domain.
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