A U D I O a n d T E L E M AT I C S
NAVIGATION-GUIDANCE
GPS
What is the navigation system and
the GPS?
The satellite navigation system guides
What precautions should be
observed in order to make best use
of the system?
What is a point of interest
(POI)?
A point of interest (POI) is
the driver to the destination that he has Do not place anything on or near the
set in accordance with a chosen route. GPS aerial.
represented by an icon on
the map, it represents an
airport, a station, a town
hall, ...
Initially, it searches for the destination Do not use any digital communication
required by the user, then it calculates equipment (personal computers, etc.)
the route and finally it provides the vi- near the GPS aerial.
sual and audible guidance instructions.
Do not affix any reflective films or films
containing carbon to the windows.
Up to 40 different icons may
be displayed (refer to the
section "Points of interest
icon").
The system's measurements may be
inaccurate if the vehicle is:
They are classified in
5 groups and identified by one colour
for each group:
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-
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in a tunnel or underground car park,
underneath a two-level motorway,
in an area with several very high
buildings,
surrounded by closely planted trees.
The GPS (Global Position-
ing System) consists of
several satellites distribut-
-
Shops, finance and businesses
(Green),
ed around the earth. They
-
-
-
Vehicles and travel (Dark blue),
Restaurants (Orange),
Public places and emergency ser-
vices (Brown),
Entertainment and attractions (Blue).
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continuously transmit digi-
tal signals which travel at the speed of
light, on 2 different frequencies.
Depending on the vehicle's situation
and the reception of the GPS informa-
tion, the displayed information may dis-
appear from the screen temporarily.
At any given time, the system receives
its position in relation to the satellites
detected and the time of transmission
of the signal.
-
This enables the telematic unit to cal-
culate its position and therefore that of
the vehicle.
A repositioning process using the map
database stored on the hard disk allows
the vehicle to be positioned on the road
network, so improving the accuracy of
the vehicle location function.
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