92 Navigation
Read First
* Time and distance to the destination cannot be displayed when your vehicle is located in the place other than roads and Highways. After the vehicle returns
to a road or Highway, time and distance are displayed.
Position Marker
■Vehicle Marker and Lock-on-Road
If GPS positioning is available, the current position is shown using the
vehicle marker. • When any vehicle is selected, the vehicle marker may not display an
accurate GPS position and direction of travel. If there is a road nearby,
the GPS positioning error is corrected based on the shortest distance
to the road to, and the direction of the icon is adjusted to match the
direction of the road.
■ Selected map location (cursor)
Use one of the following methods to mark a map location.
• Touch the map during navigation.
• Touch the map when the destinatio n you want is displayed in the
search results.
• Touch the map in “Map Search”. (See Page 134 .)
After selecting a map location, a cu rsor is displayed at the point
selected on the map. The cursor is displayed as a red point ( ) and can
be checked at all zoom levels.
You can use the cursor's position as the route's destination, search for
locations around the cursor, and save the position in the destination list.
(Arrival
Time)* Displays the estimated arrival time at the final
destination based on the information available
for the remainder of th
e journey. This is
calculated according to prior traffic data or
traffic patterns when ever available.
If a TMC receiver is conn ected to the main unit
and is receiving data, any traffic jams along the
route are also factored into calculations.
However, the accuracy of these calculations
varies greatly.
(Time) Displays the current time corrected using the
time zone offset. Accurate time is acquired from
the GPS satellite, while time zone information is
acquired form the map. You can also make
manual settings in Units and Formats.
(Only for the Menu screen, the current time is
shown in the bottom left
corner of the screen.)
(Altitude) Shows the altitude of the road currently being
driven and measured by the GPS receiver.
( There may be a maximum ±50 m of differences
depending on the reception status of GPS
satellites.)
Field
ExplanationArrival Time
Time
Altitude
174 Navigation
Glossary
2D/3D GPS reception
The GPS receiver uses signals from satellites to calculate its current
position (the user's position), but to acquire a 3D position at least four
signals are necessary, including altitude. The GPS device may not be
able to acquire signals from four satellites as they are constantly moving
and obstacles may block satellite signals. Although the accuracy
decreases when only three signals ca n be acquired, and altitude data
cannot be sent, the receiver can ca lculate a latitude and longitude GPS
position. Only 2D reception is possible.
Route being navigated
The route currently being navigated. When a destination is set, the
route will be continuously navigate d until the destination is deleted,
you arrive at the destination, or the software is closed. Also see “Route”.
City center
The center of the city/town is not th e geographical center of the city/
town, but a location set by the cartog rapher. In towns and villages, this
is usually the most important intersec tion, while in larger cities it is
selected from multiple important intersections. Color design
The color design used for the map and menu screens differs for daytime
and nighttime. Each design has a diff
erent graphic setting, with 2D and
3D each having colors for roads, bl ocks, seas, and lakes, whilst shadow
changes and shadows are displa yed differently in 3D mode.
Daytime screen and nighttime screen designs for the map and menu
are selected one at a time. The design changes automatically when day
becomes night and night becomes day.
GPS accuracy
Various factors can contribute to a margin of error between the user's
actual position and the position acquired from the GPS device. For
example, signal delays in the iono sphere or reflections from objects
around the GPS equipment, can infl uence the accuracy with which the
GPS device can calculate the user's position.
