Location Manager

Android
WinX

Android

The Location Manager aims to calculate the device pose (position and orientation) as accurate as possible using various input sources. The performance of pose estimation can be characterised by the following measures:

      •	Accuracy --> describes the average offset between real and estimated device pose
      •	Standard Deviation --> describes to which extend the estimated pose “jumps” around the real device pose
      •	Update Rate --> describes how often the device pose can be updated.

To maximise the performance, the Location Manager combines and filters estimated poses from various Pose Estimation Systems based on their estimated error levels. Pose Estimation systems can be activated and deactivated using the Pose Estimation Systems Setting. Currently the following pose estimation systems are available:

Name	Estimated Quantity	Required Sensor Technology!
AR-Marker	Position and Orientation	Camera
Beacon Proximity	Position	Bluetooth Low Energy (Blue-tooth 4.0)
Compass	Orientation	Accelerometer and Magne-tometer
GPS	Position	GPS Sensor
Object Proximity	Position	none
Step Detector	Position	Step Detector Sensor
Routing-Graph Snapping	Position	none

Besides the stated systems, the user can utilize the position of GEO-Objects by clicking the Use Location button in the Context Menu. Pose estimation is started once the device pose is requested by another part of the application (e.g. POI View, Map View, Content Browser). If the specific device does not possess the required sensor technology of an active pose estimation system, a notification is shown.

WinX

The Location Manager controlls the different positioning services that are available for mobile devices.

Possible Positioning Modes

There are three different modes available for the Location Manager. The names and defined behaviors are:

Mode	GPS	LLA	iBeacon Proximity
USE_ALL
LLA_ONLY_MODE
BEACON_PROXIMITY_MODE