15. Positioning (GPS)You can use applications such as GPS data to calculate your location or measuredistances. These applications require a GPS connection.About GPSThe coordinates in the GPS are expressed using the international WGS-84 coordinatesystem. The availability of the coordinates may vary by region.The Global Positioning System (GPS) is operated by the government of the UnitedStates, which is solely responsible for its accuracy and maintenance. The accuracyof location data can be affected by adjustments to GPS satellites made by the UnitedStates government and is subject to change with the United States Department ofDefense civil GPS policy and the Federal Radionavigation Plan. Accuracy can also beaffected by poor satellite geometry. Availability and quality of GPS signals may beaffected by your location, buildings, natural obstacles, and weather conditions. GPSsignals may not be available inside buildings or underground and may be impairedby materials such as concrete and metal.GPS should not be used for precise location measurement, and you should neverrely solely on location data from the GPS receiver and cellular radio networks forpositioning or navigation.The trip meter has limited accuracy, and rounding errors may occur. Accuracy canalso be affected by availability and quality of GPS signals.Different positioning methods can be enabled or disabled in positioning settings.Assisted GPS (A-GPS)Your device also supports Assisted GPS (A-GPS).A-GPS is a network service.Assisted GPS (A-GPS) is used to retrieve assistance data over a packet dataconnection, which assists in calculating the coordinates of your current locationwhen your device is receiving signals from satellites.Positioning (GPS)© 2010 Nokia. All rights reserved. 103
