Method for detecting map matching position of vehicle in...

Details Method for detecting map matching position of vehicle in... Method for detecting map matching position of vehicle in...

2007-03-27

2007-03-27

Zanelli, Michael J. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

C340S995250

Reexamination Certificate

active

10964028

ABSTRACT:
The present invention relates to a method for detecting a map matching position of a vehicle in a navigation system, wherein coordinates of a current vehicle location are obtained from navigation messages received by a GPS receiver using a general line equation for obtaining an intersection point between an arbitrary line and a perpendicular line drawn from an arbitrary point to the line, and the current vehicle location is matched to coordinates found through orthogonal projection on a link on a digital map closest to the obtained coordinates of the current vehicle location. The current vehicle location is detected from the navigation messages received by the GPS receiver, the detected current vehicle location is matched on the digital map to obtain coordinates P0of the current vehicle location, the digital map is searched to find a road link closest to the obtained coordinates P0of the current vehicle location, coordinates P1and P2of both end points of the searched road link are obtained, the orientation of lineP1P2defined by the coordinates P1and P2of the obtained road link is checked on the digital map, coordinates P of an intersection point of a perpendicular line drawn from the obtained coordinates P0to lineP1P2are obtained, and the current vehicle location is matched to the obtained coordinates P of the intersection point.

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