Nokia E5-00 Nokia E5-00 User Guide in US English - Page 115

Positioning (GPS) 115 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. Assisted GPS (A-GPS) Your device also supports assisted GPS (A-GPS). A-GPS requires network support. 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 A-GPS service server only when needed. To disable the A-GPS service, select Menu > Applications > Location > GPS data and Options > Positioning settings > Positioning methods > Assisted GPS > Options > Disable. You must have an internet access point defined in the device to retrieve assistance data from the Nokia A-GPS service over a packet data connection. The access point for A-GPS can be defined in positioning settings. A wireless LAN (WLAN) access point cannot be used for this service. Only a packet data internet access point can be used.