Nokia C7-00 User Manual page 93

Maps 93
The global positioning system (GPS) is a satellite-based navigation system used for
calculating your location. Assisted GPS (A-GPS) is a network service that assists your
GPS receiver, improving the speed and accuracy of the positioning. In addition, other
enhancements to GPS may be used to improve and speed up the positioning. These
may require transferring small amounts of data over the cellular network.
Wi-Fi positioning improves position accuracy when GPS signals are not available,
especially when you are indoors or between tall buildings.
With network (cell ID) based positioning, the position is determined through the
cellular system your phone is currently connected to.
To save on data costs, you can deactivate A-GPS, Wi-Fi, and network (cell ID) based
positioning in your phone positioning settings, but calculating your location may take
much longer, the location can be more inaccurate, and the GPS receiver can lose
location more frequently.
The availability and quality of GPS signals may be affected by your location, satellite
positions, buildings, natural obstacles, weather conditions, and adjustments to GPS
satellites made by the United States government. GPS signals may not be available
inside buildings or underground.
Do not use GPS for precise location measurement, and never rely solely on the
location information provided by GPS and cellular networks.
The trip meter may not be accurate, depending on the availability and quality of your
GPS connection.
Depending on the available positioning methods, the accuracy of positioning may
vary from a few metres to several kilometres.
Deactivate positioning methods
Assisted GPS (A-GPS), Wi-Fi, and network (cell ID) positioning help your device
determine your current location more quickly and accurately. To save on data costs,
especially when abroad, you can deactivate one or several of the services.
Select > Settings.
Select Application settings Positioning Positioning methods and the positioning
> >
method to deactivate.
The Assisted GPS (A-GPS) network service retrieves location information using the
cellular network, and assists GPS in calculating your current location.
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 Nokia
A-GPS service server only when needed.