About positioning methods
Maps displays your location on the map using GPS, A-GPS, WLAN, or network (cell ID)
based positioning.
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.
WLAN 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, WLAN, 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.
Maps and location 83
The trip meter may not be accurate, depending on the availability and quality of your
GPS connection.
Note: Using WLAN may be restricted in some countries. For example, in France, you
are only allowed to use WLAN indoors. For more information, contact your local
authorities.
Depending on the available positioning methods, the accuracy of positioning may vary
from a few metres to several kilometres.