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Navigation device and navigation program product

  • US 9,719,795 B2
  • Filed: 11/16/2015
  • Issued: 08/01/2017
  • Est. Priority Date: 06/29/2012
  • Status: Active Grant
First Claim
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1. A navigation device comprising:

  • a controller including a processor configured toacquire a current location of a vehicle and specifying a travel road actually traveled by the vehicle based on input information from a geomagnetism sensor, a gyroscope, a distance sensor, and a GPS receiver;

    determine an existence of a continuity between the travel road and a first road connected to an end point of the travel road, wherein the end point of the travel road is defined as a reference end point, the travel road is defined as a reference road, and the first road is defined as a determination target road;

    designate the first road as a first extension road when the continuity is determined to exist between the first road and the travel road;

    store, in a travel history, for each time the vehicle travels, a first indication that the travel road is actually traveled by the vehicle, and second indication that the first extension road is determined to have the continuity with the travel road; and

    control a map display to be changed to contain a part of a recognition road, wherein the recognition road includes the travel road that is actually traveled and the first extension road determined to have the continuity with the travel road, when the vehicle or a destination of the vehicle are in a range around the recognition road.

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