Clarion GPS Receiver NP401 User Manual

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of 81
 
English
Owner’s
Manual
72 NP401
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.
Active route
The currently navigated route. You can save
and load routes in Clarion Mobile Map, but only
one route can be active at any given time, and
it is always active until you delete it, reach your
destination or you quit Clarion Mobile Map. See
also: Route.
City Center
The City Center is not the geometric center of the
city but an arbitrary point the map creators have
chosen. In towns and villages, it is usually the
most important intersection; in larger cities, it is an
important intersection.
GPS accuracy
Several factors have 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.
Map
Clarion Mobile Map works with digital maps
which are not simply the computerized versions
of traditional paper maps. Similarly to the paper
road maps, the 2D mode of digital maps show
you streets, roads, and elevation is also shown by
colors.
In 3D mode, you can see the altitude differences,
for example valleys and mountains, elevated
roads, and in selected cities 3D landmarks and 3D
buildings are also displayed.
You can use digital maps interactively: you can
zoom in and out (increase or decrease the scale),
you can tilt them up and down, and rotate them
left and right. In GPS-supported navigation, digital
maps facilitate route planning.
North-upmaporientation
In North-up mode the map is rotated so its top
always faces North. This is the orientation in 2D
map view mode and in Overview mode. See also:
Track-up map orientation.
Overviewmode
You can instruct Clarion Mobile Map to
automatically switch to Overview mode if the next
route event is in a distance. In Overview mode
the map is shown in 2D but scaled down to a
predefined zoom level. When you approach the
next route event, the previous 2D or 3D map view
returns automatically.
Route
A series of destinations to be reached one after the
other. A simple route contains one start point and
7. Glossary
NP401 OM_100920_EN.indd 72 2011-1-6 16:11:04

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