GPS Maps and Directions
The
Global Positioning System (GPS) is used for location-based activities such
as navigation, tracking, and location. GPS maps and directions can be used
for driving, biking, walking, hiking, and public transit. Maps can show
locations, places, routes, details, terrain (topographic), 3D views, street
views, reviews, and other information. Some maps show the indoors of select
airports, tourist sites, shopping malls, and retail stores.
Maps are either stored on the device or stored on the network (cell phone
or GPS provider). The map information is received over a cell phone or GPS
connection depending on the device's features. The map's database is used
to compute navigation information and location-specific information.
The GPS device or service should include maps of cities in your country.
The scale and detail of maps varies. Updated maps show current road changes
due to construction and closures. Additional maps or more detailed maps
can be purchased. Some services provide map updates for the life of the
device or service. Others charge a fee for map updates. Map prices range
from $30-150.
The main features for GPS maps and directions are:
- Auto-routing - Type in the start and destination addresses, and
the map shows the route. Choose the fastest, shortest or most fuel-efficient
route. Follow the turn-by-turn directions to the destination.
- Voice prompts - A voice tells you where and when to turn on the
road. Allows you to keep your eyes off the display and on the road for
safer driving.
- Real-time tracking - When connected to the network, an arrow
(or dot) moves on the screen and gives information about your current
position, speed, and past route.
- Traffic overlay - Indicates the level of traffic congestion and
road construction on the current route and alternative routes. Data is
received over an FM transmission. Getting traffic information might have
an additional charge.
- Points of Interest (POI) - Overlay on the map shows places that
have tourist, historical, or commercial purposes. The type, quantity,
accuracy, details, and search (results) of information from each database
varies, so check before you buy. For example, some map POIs are based
on the American Automobile Association (AAA) TourBook.
- Waypoints - A waypoint is a position along your route that you
want to save and refer or return to later. Some maps allow notes to be
added to the waypoint.
- Lane-assist - Tells you which lane to be in to prepare for upcoming
turns or exits.
GPS
maps can help you understand where you are and where you are going relative
to your surroundings or another location, device or person.
Using a GPS map requires some practice to get the basic information you
need quickly and easily, and without mistakes that could lead you to the
wrong place. Then you can explore more advanced features such as voice prompts,
3D views, rerouting, and application-specific features.
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