Positioning (GPS)
You can use applications such as GPS data to calculate your
location or measure distances. These applications require a
GPS connection.
About GPS
The coordinates in the GPS are expressed using the
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 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.
Different positioning methods can be enabled or disabled in
positioning settings.
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 provider-specific A-GPS settings are available.
The assistance data is retrieved from the Nokia A-GPS service
server only when needed.
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. To define an access point for A-GPS,
select Menu > Applications > Location and Positioning >
Positioning server > Access point. A wireless LAN (WLAN)
access point cannot be used for this service. Only a packet
data internet access point can be used. Your device asks for
the internet access point when GPS is used for the first time.
© 2009 Nokia. All rights reserved.82
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