Credits & Attributions

The Trail

• Trail route derived from the official Arizona Trail data published by the Arizona Trail Association. The ATA builds, maintains, and protects the real 800-mile trail — if this app makes you want to walk the real thing, support them.

Terrain & Imagery

• Elevation: Terrain Tiles (Terrarium format) on the AWS Open Data Registry — data from USGS 3DEP, NASA SRTM, and others via Mapzen/Nextzen.
• Satellite imagery: Esri World Imagery — sources include Esri, Maxar, Earthstar Geographics, and the GIS User Community.

Sky

• Star catalog: HYG Database v4.2 by David Nash (CC BY-SA 4.0); constellation figures from IAU data.
• Satellite orbits: CelesTrak TLEs · SGP4 propagation via satellite.js.
• Live aircraft: adsb.lol community ADS-B network.
• Planetary positions: JPL Keplerian elements (Standish); lunar/eclipse math after Meeus, Astronomical Algorithms.

Live Environment Data

• Weather, forecasts, air quality & historical archive: Open-Meteo (CC BY 4.0).
• Streamflow: USGS National Water Information System · Earthquakes: USGS · Wildfires: NIFC WFIGS.
• Aurora: NOAA Space Weather Prediction Center · historical Kp: GFZ German Research Centre for Geosciences.
• Snowpack: USDA NRCS SNOTEL network · Park alerts: National Park Service · Forecast text: NOAA/NWS.
• Wildlife sightings: iNaturalist contributors & GBIF.

Bird Recordings

Every bird call is a real field recording from xeno-canto, used under the Creative Commons license each recordist chose. Thank you to every one of them — the soundscape is theirs:

Software

• Three.js · TypeScript · Vite · Zustand · satellite.js.