[Question] What's the best way to determine where device is heading to

[alifa20]

Your Environment

• Plugin version: ^4.17.1
• Platform: iOS
• OS version: 14.6.1 (23G93)
• Device manufacturer / model:
• React Native version (react-native -v): 0.74.5
• Plugin config

  useEffect(() => {
    const onLocation: Subscription = BackgroundGeolocation.onLocation(
      (location) => {
        console.log("[onLocation]", location);
        setLocation(location);
      }
    );

    const onMotionChange: Subscription = BackgroundGeolocation.onMotionChange(
      (event) => {
        console.log("[onMotionChange]", event);
      }
    );

    const onActivityChange: Subscription =
      BackgroundGeolocation.onActivityChange((event) => {
        console.log("[onActivityChange]", event);
      });

    const onProviderChange: Subscription =
      BackgroundGeolocation.onProviderChange((event) => {
        console.log("[onProviderChange]", event);
      });

    BackgroundGeolocation.ready({
      desiredAccuracy: BackgroundGeolocation.DESIRED_ACCURACY_HIGH,
      distanceFilter: 10,
      locationAuthorizationRequest: "WhenInUse",

      stopTimeout: 5,

      debug: false,
      logLevel: BackgroundGeolocation.LOG_LEVEL_VERBOSE,
      stopOnTerminate: false,
      startOnBoot: true,
      stopOnStationary: false,
      desiredOdometerAccuracy: 10,
      stationaryRadius: 5,

      batchSync: false,
      autoSync: true,
    }).then((state) => {
      setEnabled(true);
      console.log(
        "- BackgroundGeolocation is configured and ready: ",
        JSON.stringify(state.enabled)
      );
    });

    return () => {
      onLocation.remove();
      onMotionChange.remove();
      onActivityChange.remove();
      onProviderChange.remove();
    };
  }, []);

Expected Behavior

I'm having trouble with location?.coords.heading, which often returns -1, likely because the GPS isn't reliable. The library does a good job tracking speed, but I need a better way to figure out the direction the user is heading so I can show it on the map.

I've looked through the docs but haven't found a good solution. Has anyone else dealt with this or found a better way to estimate the user's direction?

Any help would be great!

[christocracy]

It’s not unusual to see heading: -1.

GPS only works outdoors and heading only comes from GPS.

you are not guaranteed to always receive heading.