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Data Attributions

Last updated August 2026

The Emrelia E3X presents data from government and open sources. We're grateful to all of them; the notices below are required by their licenses and gladly given.

Terrain

Terrain elevation is derived from the Copernicus digital elevation model: produced using Copernicus WorldDEM™ data © DLR e.V. 2010–2014 and © Airbus Defence and Space GmbH 2014–2018 provided under COPERNICUS by the European Union and ESA; all rights reserved.

Map data

  • Base map features © OpenStreetMap contributors, available under the Open Database License (ODbL).
  • Airport data from OurAirports (public domain).
  • VFR aeronautical data for participating regions © open flightmaps association (OFMA) and contributors.
  • Airspace and obstacle data for supported regions from openAIP contributors.

United States government sources

  • FAA: NASR airspace/airport data, d-TPP terminal procedures, VFR and IFR charts, Chart Supplement (public domain).
  • NOAA / National Weather Service: METARs, TAFs, SIGMETs, PIREPs, MRMS precipitation, GFS winds aloft (public domain).

Simulator ecosystems

  • Airport layout data from the X-Plane Scenery Gateway, per its license terms.

Fonts and site software

The typefaces served by this site (Barlow and IBM Plex) are licensed under the SIL Open Font License 1.1 — copyright notices and the full license are on the font licenses page. The site is built with open-source software, including Astro, Starlight, and Pagefind (MIT licensed).

Some derived data stores carry share-alike obligations; see corresponding source.