If you do not want to use off-road naviga-
tion, switch back to on-road navigation by
tapping and .
iGo map Operation
When you reach the final destination, the navigation
ends.
4 Reference guide
The following sections describe the different
concepts and menu screens of Epsilon Linux device.
4.1 Concepts
The following sections describe and explain naviga-
tion-related concepts.
4.1.1 2D/3D GPS reception
The GPS receiver uses satellite signals to calculate its
(your) position and needs at least four signals to give
a three-dimensional position, including elevation.
Because the satellites are moving and because
objects can block the signals, your GPS device might
not receive four signals. If three satellites are
available, the receiver can calculate the horizontal
GPS position but the accuracy is lower and the GPS
device does not give you elevation data; only 2D
reception is possible. Several factors have an impact
on the deviation between your real position and the
one given by the GPS device. For example, signal
delay in the ionosphere or reflecting objects near the
GPS device have a different and varying impact on
how accurately the GPS device can calculate your
position.
4.1.3 Road safety cameras and other proximity
Alert Points There is a special proximity warning for
road safety cameras (like speed or red light cameras)
and other proximity Alert Points (like schools or
railroad crossings). These Alert Points are not part of
Epsilon Linux device.
You can add your own Alert Points.
The application can warn you when you approach
road safety cameras like speed cameras or dangerous
areas like school zones or railroad crossings. You can
set up the different alert types individually in the
Warnings settings.
The following warning types are available:
For some of the Alert Points, either the enforced or
expected speed limit is available. For these points,
the audio alert can be different if you are below or
above the given speed limit.
*Only when speeding: The audio alert is only
played when you exceed the given speed
limit.
*Audio warning: beeps are played (if the voice
guidance language that you selected is a
natural voice) or the type of the alert can be
announced (TTS voice) while you are
approaching one of these points, and an extra
alert warns you if you exceed the given speed
*Visual warning: the type of the Alert Point, its
distance and the related speed limit appear on
the Navigation view while you are approach-
ing one of these locations.d limit while
approaching.
*When approaching: The audio alert is always
played when approaching one of these Alert
Points. In order to draw your attention, the
alert is different when you exceed the speed
limit.
4.1.2 Natural and TTS voices
Natural voices are the traditional type of voice
instructions. Every phrase that occurs in voice
guidance messages is recorded in a studio with a real
person. The advantage of pre-recorded voice is that it
sounds really natural, but the range of instructions
that can be given this way is limited. Location-specif-
ic information such as street names cannot be
announced. TTS technology provides a
machine-generated way to give voice instructions.
The advantage of TTS is that it can announce street
names, traffic events, route summary, and traffic
rules.
Note:
The warning for road safety cameras is
usually disabled when you are in a country
where road safety camera warnings are
prohibited. Make sure that using this feature
is legal in the country where you intend to
operate. Use it on your own responsibility.
You can also disable Alert Point warnings
manually. See page page 73 for instructions.
Note:
63
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