Data credits

Maps

• OpenStreetMap

  Basemap, land use, water, landmarks and obstacles, including extracts via Overpass, Geofabrik and osmdata coastlines.

  Licence: Open Database License (ODbL)

  © OpenStreetMap contributors

• Protomaps

  Vector basemap tiles, fonts and map symbols.

  Licence: BSD-3-Clause (software and styles); data © OpenStreetMap contributors

• Esri World Imagery

  Optional satellite basemap, for planning only.

  Licence: Esri terms of use

  Powered by Esri

• Natural Earth

  Country outlines.

  Licence: Public domain

Aeronautical data

• OpenFlightMaps

  Airspace, aerodromes, navaids, reporting points and runways (OFMX).

  Licence: Open Database License (ODbL)

• OpenAIP

  Obstacles, and airspace and aerodromes where OpenFlightMaps has no coverage.

  Licence: CC BY-NC 4.0 (non-commercial use only)

• FAA NOTAM Management Service

  NOTAMs and NOTAM areas.

  Licence: FAA terms of use

Terrain and elevation

• Copernicus DEM GLO-30

  Hillshade, contour lines and the offline terrain model.

  Adapted: Smoothed, extended past coastlines and borders, and re-encoded as map tiles.

  Licence: Copernicus DEM licence (free and open, commercial use permitted). Citation: DOI 10.5270/ESA-c5d3d65

  produced using Copernicus WorldDEM-30 © 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

• EU-DEM v1.1 via OpenTopoData

  Terrain along the route (vertical profile, minimum safe altitude) and ground elevation.

  Adapted: Sampled along the route, converted to feet, and the minimum safe altitude derived from it.

  Licence: Copernicus data policy (free and open); served by the public OpenTopoData API

  EU-DEM v1.1 from the Copernicus Land Monitoring Service, produced with funding by the European Union. OpenVFR is not endorsed by the European Union.

• EGM96 geoid (NGA / NASA)

  Converts GPS height above the ellipsoid to altitude above sea level.

  Licence: Public domain

Weather and wind

• aviationweather.gov (NOAA)

  METAR and TAF, and the aerodrome weather colouring on the map.

  Licence: US government data (public domain)

• Open-Meteo

  Model wind on the map, winds aloft along the route, forecast wind and the aerodrome weather-station reading.

  Adapted: Interpolated to the route, the planned altitude and the flight time.

  Licence: CC BY 4.0

  Weather data by Open-Meteo.com

Live traffic

• OpenSky Network

  Live ADS-B traffic.

  Licence: OpenSky Network terms of use (non-commercial)

• Open Glider Network and OGN Devices Database

  Live FLARM and glider traffic. Device owners’ opt-outs (no tracking, no identification) are honoured.

  Licence: Open Database License (ODbL) and the OGN data usage rules

Software

OpenVFR is open source. The map is drawn with MapLibre (BSD-3-Clause). Every open-source package in the apps, with its licence and notice, is on the open-source licences page, and the code is in the source repository.