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US 2006/0080033 A1Published application
Method and apparatus for map matching
AssigneeAlpine Electronics, Inc.
InventorMichihisa Komatsu
Life of this patent
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AssigneeAlpine Electronics, Inc.
InventorMichihisa Komatsu
Estimating the term…
A navigation apparatus and a map matching method are provided which enable correct determination that a vehicle is traveling a downgrade or an upgrade link. Information on gradients of road links is incorporated and stored in a map database. An acceleration sensor detects an acceleration of the vehicle. A gradient determination section determines an angle of inclination θ of the road link being currently traveled or a value corresponding to the angle θ (sin θ) using the acceleration detected by the acceleration sensor. The gradient determination section determines a vertical distance traveled from the inclination angle and from a speed of the vehicle to accumulate the distances, each serving as a vertical deviation. If the accumulated value of the vertical deviations H is larger than a set value TH, the determination section determines that the road link being traveled is the upgrade or downgrade link. A map matching processor performs map matching processing using a result of the determination and the gradient information.
A navigation apparatus for displaying a map covering a position of a vehicle and surroundings thereof, the apparatus comprising:
A method for performing map matching processing in a navigation apparatus, the method comprising the steps of:
A method for performing map matching processing in a navigation apparatus, the method comprising the steps of:
Dependencies are inferred from the claim text.