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Positioning
These applications require a GPS
connection.
About GPS
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.
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 provider-
specific 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
>
Applications > 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. Only a packet data
internet access point can be used. Your
device asks you to select the internet
access point when GPS is used for the first
time.
Positioning 53
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