CaptainCalc map surfaces use OpenStreetMap attribution where applicable.

Required attribution used by the offline map bundle model:
- Copyright notice: © OpenStreetMap contributors
- Official reference: https://www.openstreetmap.org/copyright
- Visibility in app metadata: requiredVisible=true

OpenStreetMap data terms:
- OpenStreetMap data is licensed under the Open Data Commons Open Database License (ODbL) by the OpenStreetMap Foundation.
- Official copyright and attribution guidance:
  https://www.openstreetmap.org/copyright
- Attribution guidance overview:
  https://wiki.openstreetmap.org/wiki/Attribution_guidelines

If CaptainCalc distributes or displays map data derived from OpenStreetMap, the visible attribution should remain available to the user.