Nokia N97 Nokia N97 User Guide in English and Spanish - Page 87

Positioning (GPS) 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. 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 About GPS international WGS-84 coordinate system. The availability of the coordinates may vary by region. The Global Positioning System (GPS) is operated by the government of the United States, which is solely responsible for its accuracy and maintenance. The For the pricing and availability of these services, contact your service provider. accuracy of location data can be affected by adjustments to GPS satellites made by the United Assisted GPS (A-GPS) States government and is subject to change with the United States Department of Defense civil GPS policy Your device also supports assisted GPS (A-GPS). and the Federal Radionavigation Plan. Accuracy can A-GPS requires network support. also be affected by poor satellite geometry. Availability Assisted GPS (A-GPS) is used to retrieve assistance data and quality of GPS signals may be affected by your over a packet data connection, which assists in location, buildings, natural obstacles and weather calculating the coordinates of your current location conditions. GPS signals may not be available inside when your device is receiving signals from satellites. buildings or underground and may be impaired by materials such as concrete and metal. When you activate A-GPS, your device receives useful satellite information from an assistance data server GPS should not be used for precise location over the cellular network. With the help of assisted measurement, and you should never rely solely on data, your device can obtain the GPS position faster. location data from the GPS receiver and cellular radio networks for positioning or navigation. Your device is preconfigured to use the Nokia A-GPS service, if no service provider-specific A-GPS settings are available. The assistance data is retrieved from the 87 Nokia A-GPS service server only when needed.