tow SUBARU BRZ 2013 1.G Navigation Manual

172 Navigation
Reference Data
Visual Guidance
Changes settings related to Map screen guidance.• (Data Fields):
You can set the data fields displaye d at the corner of the Map screen
to match your needs. Touch this button and select the guidance you
want to display. Values may differ when driving without having set a
destination in route navigation. You can select current speed or
altitude and so on for a standard trip data, or select route data related
to the final destination or th e next waypoint on the route.
• (Highway Services):
Displays service area information while driving on the expressway.
You can turn this function on and off.
• (Facility Types):
Touch this button and select the service area information display
items you want to display.
• (Signposts):
When information is available, lane information similar to overhead
road traffic signs is displayed at th e top of the map. You can turn this
function on and off.
• (Junction View):
When approaching an expressway exit or a complicated intersection,
the map switches to a 3D display if the necessary information can be
displayed. •
(Route Progress Bar):
Turns on the route progress bar which is displayed as a straight line
to the left of the map. This show s the progress made on the current
route. When a blue arrow is used to indicate position, the arrow
continues to rise as you drive towards your destination. Waypoints
and traffic conditions are displayed on the line.
Data Fields
Highway Services
Facility Types
Signposts
Junction View
Route Progress Bar

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.