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The receiving party (e.g., a tow truck) can store the waypoint in a computer system, draw a map indicating the location, or see it in an automotive navigation system.All new global positioning systems (GPS) come with installed maps.However, with some manufacturers, new wiring is required, making the installation more complex.The primary benefit of this approach is an integrated and factory-standard installation.Automotive navigation systems represent a convergence of a number of diverse technologies many of which have been available for many years, but were too costly or inaccessible.Limitations such as batteries, display, and processing power had to be overcome before the product became commercially viable. Street names or numbers and house numbers, as well as points of interest (waypoints), are encoded as geographic coordinates.The NDS effort began in 2004 and became a registered association in 2009.
This can vary by manufacturer and the operating system installed on the GPS unit.Many original systems also contain a gyrocompass and/or an accelerometer and may accept input from the vehicle's speed sensors and reverse gear engagement signal output, thereby allowing them to navigate via dead reckoning when a GPS signal is temporarily unavailable.However, the costs can be considerably higher than other options.Dead reckoning using distance data from sensors attached to the drivetrain, a gyroscope and an accelerometer can be used for greater reliability, as GPS signal loss and/or multipath can occur due to urban canyons or tunnels.Mathematically, automotive navigation is based on the shortest path problem, within graph theory, which examines how to identify the path that best meets some criteria (shortest, cheapest, fastest, etc.) between two points in a large network.