Positioning
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 accura
cy and maintenance. The
accuracy of location da
ta 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.
The GPS receiver should only
be used outdoors to allow
reception of GPS signals.
Any GPS should not be used for precise location
measurement, and you shou
ld 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 prov
ider-specific A-GPS settings
are available. The assistance data is retrieved from th
e
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
> 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 a
ccess point when
GPS is used for the first time.
27
Positioning
Cyan
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