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Vehicular navigation system and storage medium

  • US 6,108,604 A
  • Filed: 08/07/1998
  • Issued: 08/22/2000
  • Est. Priority Date: 08/08/1997
  • Status: Expired due to Term
First Claim
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1. A vehicular navigation system comprising:

  • present position detecting means for computing the present position of a vehicle;

    information storing means containing area information for guidance in a direction of a road emanating from a guide branch and data necessary for the route guidance, and including direction guide phrase data corresponding to individual areas;

    input means for inputting information necessary for computing a route;

    route computing means for computing the route on the basis of the information input by said input means;

    route information storing means for storing the information of the route, as computed by said route computing means;

    output means for outputting information for route guidance; and

    guidance control means for outputting the guidance information of a next guidance branch to said output means on the basis of the route, as computed by said route computing means, and the present position detected by said present position detecting means,wherein said guide control means acquires information of an angle between a road entering and a road departing a rotary branch on a route stored in said route information storing means, and a junction angle and information of changing angles of individual links forming the rotary, and outputs direction guidance information on the basis of the acquired information.

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