GNSS enhancements bundle

https://github.com/MerginMaps/mobile/pull/4234

Internal provider (no external device)

Android

• fused is now by default

• system reports ellipsoid heights

• we transform to EGM96 by default

  • geoid height + ellipsoid height values are available

• transforming to chosen geoid is available and geoid height + ellipsoid height values are also available

iOS

• system reports msl heights

  • by default we do not do any transformations, simply accept whatever is coming from the system
  • geoid height + ellipsoid height values are not available

• transforming to chosen geoid - @Withalion ?

External provider - Mock

• If there is no transformation, we accept data as they come
  • geoid height + ellipsoid height values are not available
• Transforming to chosen geoid is available, but users must set the mock app to send ellipsoid heights, otherwise undulation would be applied twice

iOS

• iOS only sends a minimal subset of available GPS data - x, y, z (no accuracy,...)

External provider - Bluetooth

• Available only on Android
• If there is no transformation, we accept data as they come
  • geoid height + ellipsoid height values are available, but we do not know the selected geoid model
• transforming to chosen geoid is available and geoid height + ellipsoid height values are also available + we know the geoid model and show it in the app

External provider - Network

(same as bluetooth)