将地理围栏半径设置为200米，但触发位置距离地理围栏中心50米。为什么？

Question

这就是我创建地理围栏的方式：

   ArrayList geofences = new ArrayList<>();
        geofences.add(new Geofence.Builder()
                .setRequestId(geofenceRequestID)
                .setTransitionTypes(Geofence.GEOFENCE_TRANSITION_EXIT)
                .setCircularRegion(
                        location.getLatitude(), location.getLongitude(), radius)
                .setExpirationDuration(Geofence.NEVER_EXPIRE)
                .build());

其中：geofenceRequestID = "1";，半径为：200;

这是我添加地理围栏的方式：

  mGeofencingClient.addGeofences(getGeofencingRequest(location, geofences), getGeofencePendingIntent(context)).addOnSuccessListener(new OnSuccessListener<Void>() {
                @Override
                public void onSuccess(Void aVoid) {
                    isSettingGeofence = false;
                    Utils.makeNotification(context, "GEOFENCE ADDED: " + location.getLatitude() + ", " + location.getLongitude(), true);
                    PSLocationService.getInstance(context).setTrackingEnabled(false);
                    Utils.appendLog(context, "Geofence Transitions Service setGeofenceRequest Success adding geofences!" +
                                    location.getLatitude() +
                                    " , " + location.getLongitude(),
                            "I",
                            Constants.GEOFENCE);
                }
            }).addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    isSettingGeofence = false;
                    Utils.appendLog(context, "Geofence Transitions Service setGeofenceRequest FAILURE adding geofences!" +
                                    e.getMessage(),
                            "E",
                            Constants.GEOFENCE);
                }
            });

现在处理意图。我这样做：

  Location triggering = geofencingEvent.getTriggeringLocation();
        if(triggering != null) {
            Utils.appendLog(PSGeofenceTransitionsIntentService.this, "GEOFENCE onHandleIntent got an EXIT transition: " + triggering.getLatitude() + ", " + triggering.getLongitude() + "/ " + triggering.getAccuracy(), "D", Constants.GEOFENCE);
        }

我遇到了这个案子：

2017-10-17 14:38:32.615 30908:30908 [I] psngr.TRACKER.geofence Geofence Transitions Service setGeofenceRequest Success adding geofences! 52.37040665000001 , 4.9299061
2017-10-17 14:39:18.664 30908:8765 [D] psngr.TRACKER.geofence GEOFENCE onHandleIntent got an EXIT transition: 52.370363, 4.9306961/ 899.999

如果您检查它们之间的距离：https://www.google.nl/maps/dir/52.370363,+4.9306961/52.3704067,4.9299061/@52.370435,4.9300744,18.8z/data=!4m7!4m6!1m3!2m2!1d4.9306961!2d52.370363!1m0!3e3 或者使用：http://www.gpsvisualizer.com/calculators它会给你54米的距离。 现在我看到我的触发位置的准确性是899.999，但是地理围栏机制不应该考虑到这一点吗？这是一个错误，我需要以某种方式将其提升到谷歌吗？或者我做错了什么？