Motrex HAVN-100HMCIS, Руководство пользователя

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Glossary
2-43
Glossar
y
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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.
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Active route
The currently navigated route. You can save
and load routes in HAVN-100HMCIS
Navigation, 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 HAVN-100HMCIS Navigation. See also:
Route.
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City Centre
The City Centre is not the geometric centre of
the settlement 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.
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Map
HAVN-100HMCIS Navigation works with
digital maps which are not simply the
computerised 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 colours.
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
turn them left and right. In GPS-supported
navigation, digital maps facilitate route
planning.
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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.
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Overview mode
You can instruct HAVN-100HMCIS Navigation
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.
5. Glossary
HM_[영어]_Part4-6.indd 43 2008-12-19 오후 3:38:17