NDGPS


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NDGPS

(National Differential GPS) A ground-based augmentation system maintained by the U.S. Department of Transportation that provides GPS accuracy to within three feet. Initially developed for the Coast Guard, it was enhanced to cover the entire country, but is monitored from the Coast Guard's Navigation Center in Alexandria, VA. NDGPS is used by highway and road crews as well as by the police, but is available to anyone with an NDGPS receiver. See GPS augmentation system and GPS.
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Dave Gorg of the Minnesota DOT reports that a host of new applications of the improved positioning accuracy available through NDGPS are being planned.
In Minnesota, a computer-driven heads-up display that presents accurate positioning information from NDGPS has been developed.
With better information available from the NDGPS map -- better quantitatively and qualitatively -- many more applications will be possible.
Aerial photographs (digital orthophotos), which employ "white targets" on the ground, can be compared with NDGPS exact positioning data to document the history of accidents in selected areas.
3 meters) -- the driver will need the assistance of an NDGPS positioning map on the heads-up display.
ITS applications that will benefit from NDGPS include navigation and route guidance; the management of fleets of vehicles, such as trucks, public transit buses, emergency vehicles, snowplows, and maintenance equipment; emergency notification or mayday services; roadway maintenance; and intelligent vehicle infrastructure.
When equipped with NDGPS, these systems can determine a vehicle's location with respect to intersections and side of a divided highway.
The level of accuracy provided by NDGPS will make pick-up and delivery services even more efficient.
NDGPS and computer-aided dispatch systems will improve the effectiveness, efficiency, and coordination of emergency response teams, including firemen, paramedics, and police.
It is estimated that widespread use of an integrated vehicle safety system with an NDGPS receiver can save more than 1,000 lives annually on the roads.