Nokia X6 16GB Nokia X6 16GB User Guide in US English - Page 75

Positioning (GPS) 75 Positioning (GPS) You can use applications such as GPS data to find out your location, or measure distances and coordinates. These applications require a GPS connection. About GPS The Global Positioning System (GPS) is operated by the government of the United States, which is solely responsible for its accuracy and maintenance. The accuracy of location data can be affected by adjustments to GPS satellites made by the United States government and is subject to change with the United States Department of Defense civil GPS policy and the Federal Radionavigation Plan. Accuracy can also be affected by poor satellite geometry. Availability and quality of GPS signals may be affected by your location, buildings, natural obstacles and weather conditions. GPS signals may not be available inside buildings or underground and may be impaired by materials such as concrete and metal. GPS should not be used for precise location measurement, and you should never rely solely on location data from the GPS receiver and cellular radio networks for positioning or navigation. The trip meter has limited accuracy, and rounding errors may occur. Accuracy can also be affected by availability and quality of GPS signals. The coordinates in the GPS are expressed using the international WGS-84 coordinate system. The availability of the coordinates may vary by region. For the pricing and availability of these services, contact your service provider. 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 data connection, which assists in calculating the coordinates of your current location when your device is receiving signals from satellites. When you activate A-GPS, your device receives useful satellite information from an assistance data server over the cellular network. With the help of assisted data, your device can obtain the GPS position faster. Your device is preconfigured to use the Nokia A-GPS service, if no service providerspecific A-GPS settings are available. The assistance data is retrieved from the Nokia AGPS service server only when needed. © 2009 Nokia. All rights reserved. 75