I have the below code which fires the GeoCoordinateWatcher PositionChanged event for every 0.5 meteres .It might be less.But thats my requirement.

The issue is when i am walking with phone doesnt fire the event at every 0.5 meters instead it fires the event after 0.5 meters randomly.And sometimes when i move fast it fires few events one after another immediately.

Can anybody help me with how to ensure it fires the positionchanged event for every 0.5 meters accurately .

            watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.Default);
            if (watcher.Permission == GeoPositionPermission.Granted)
            {
                watcher.MovementThreshold = 0.5;//in meters
            }

            watcher.PositionChanged += new EventHandler<GeoPositionChangedEventArgs<GeoCoordinate>>(watcher_PositionChanged);    //   PositionChanged events occur whenever your position changes     
            watcher.StatusChanged += new EventHandler<GeoPositionStatusChangedEventArgs>(watcher_OnStatusChanged);
            watcher.Start();