04937751 is referenced by 73 patents and cites 7 patents.

A navigation apparatus for navigating an automotive vehicle in accordance with a preset course while measuring distance travelled and steering angle is characterized by previously storing positions of charactering features along the course and guidance information relating to said characterizing features, correlating travelling distance and the positions of the characterizing features, and outputting guidance information relating to a particular characterizing feature on the condition that said characterizing feature has been approached. Guidance information relating to a particular characterizing feature is outputted when the vehicle has approached this characterizing feature. Thereof, by matching this guidance information with the circumstances along the course, the driver can verify during travel whether the course is correct or not. Accordingly, even if it is a long distance to the intersection at which the next turn is to be made, the driver is capable of verifying the course by the time this intersection is reached. this enables the driver to drive the vehicle without anxiety.

Title
Navigation apparatus
Application Number
7/217530
Publication Number
4937751
Application Date
July 11, 1988
Publication Date
June 26, 1990
Inventor
Shoji Yokoyama
Anjo
JP
Mitsuhiro Nimura
Anjo
JP
Agent
Varndell Legal Group
Assignee
Kabushiki Kaisha Shinsangyokaihatsu
JP
Aisin AW
JP
IPC
G06F 15/50
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