Nokia N81 User guide

Positioning

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ISSUE 1 EN

Contents

Positioning..................................................6

Set up GPS connection ........................................................ 6

About satellite signals..........................................................7

Position requests ...................................................................7

Maps ........................................................................................7

Browse maps...................................................................8

Satellite information..................................................... 9

Download maps............................................................10

Nokia Map Loader .......................................................10

Search for locations....................................................11

Plan a route...................................................................11

Extra services for Maps..............................................11

Navigation .....................................................................12

Guides .............................................................................12

Landmarks ............................................................................13

GPS data ...............................................................................13

Route guidance ............................................................14

Retrieve position information..................................14

Trip meter.......................................................................14

Positioning

The Global Positioning System (GPS) is a worldwide radio
navigation system that includes 24 satellites and their

Positioning

ground stations that monitor the operation of the
satellites.

A GPS terminal receives low-power radio signals from the
satellites, and measures the travel time of the signals.
From the travel time, the GPS receiver can calculate its
location to the accuracy of meters.

The coordinates in the GPS are expressed in degrees and
decimal degrees format using the international WGS-84
coordinate system.

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. The GPS
receiver should only be used outdoors to allow reception
of GPS signals.

4

GPS should only be used as a navigation aid. It should not
be used for precise location measurement and you should
never rely solely on location data from the GPS receiver for
positioning or navigation.

To enable or disable different positioning methods,
Positioning (GPS) such as Bluetooth GPS, press , and
select Tools > Settings > General > Positioning >

Positioning methods.

Set up GPS connection

You can use GPS with an external GPS receiver.

To enable the use of an external GPS receiver, see the
device settings in the user guide.

Bluetooth technology provides a wireless connection
between the GPS receiver and your device. You may
therefore freely position the GPS receiver for optimum
satellite reception.

To set up your GPS connection:

1 Fully charge your GPS receiver, and switch it on.
2 Set up a Bluetooth connection between your device

and the GPS receiver.