Open source credits
Updated October 28, 2026
Map data
Street maps use data from OpenStreetMap, © OpenStreetMap contributors, available under the Open Database License.
The map tiles are © OpenMapTiles and are served by OpenFreeMap.
The map editor uses MapLibre GL JS, © MapLibre contributors, under the BSD 3-Clause License.
Places
Place names and coordinates come from GeoNames, under CC BY 4.0.
Stars
The magnitudes of the brightest stars come from the HYG database by David Nash, under a Creative Commons BY-SA licence. We use only the magnitudes of the stars brighter than magnitude 2.3.
Fonts
These fonts are used under the SIL Open Font License 1.1:
- Lato, © 2010–2014 Łukasz Dziedzic
- Noto Sans JP, KR, SC and TC, © 2014–2021 Adobe
- Noto Emoji, © 2013 Google LLC
- Inter, © 2020 The Inter Project Authors
- Newsreader, © 2020 The Newsreader Project Authors