Whether the user-position marker is currently on the map.
Whether the accuracy-circle GeoJSON layer is currently on the map.
Toast element shown while the GPS fix is pending. Dismissed on first fix or on error. Undefined before the first start attempt.
The floating re-center button appended to the map container.
Internal runtime state for the geolocation control. Tracks live map artefacts that must be cleaned up when geolocation stops.