Alpine NVD-A121 SMART MAP PRO Owner's Manual page 12

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Navigation Terminology
Present Vehicle Position Indicator
The present vehicle position is indicated by an
arrowhead within a circle.
Map Matching
Since GPS has an error window of about 100 - 650 feet
(30 m - 200 m), the position of the vehicle may be
calculated in such a way that it is displayed incorrectly off
the road. Map matching automatically corrects this error
so that the vehicle is displayed on the road.
Destination
The destination point is represented by a checkered flag.
Address Book
Up to 99 personal locations and phone numbers can be
stored in the system's memory.
Popular Points of Interest
Seven different POI icons can be programmed to appear
on the map. These icons indicate the locations and
names of the nearest ATMs, banks, gas station,
restaurants, hotels, supermarkets and parking garages.
All seven icons can be displayed on the screen at one
time.
Note: The brand icons (eight petrol companies) of the
gas stations appear on the map. For details, see
page 59 of this Manual.
4
Present vehicle
position
Uncorrected
Corrected
Destination icon
Route

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