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Navigation apparatus and navigation method

  • US 20050004746A1
  • Filed: 02/24/2003
  • Published: 01/06/2005
  • Est. Priority Date: 03/01/2002
  • Status: Active Grant
First Claim
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1. A navigation device is characterized by comprising:

  • position detecting means for determining the current position of a user from the absolute position in longitude and latitude by using the electric waves coming from a plurality of artificial satellites going around the earth;

    storage means for storing the coordinates in the longitude and latitude of a starting place and a final place, and the coordinates in the longitude and latitude of nodes, as obtained by setting said starting point and said final place, on a scheduled route;

    display means for displaying said current position and said scheduled route; and

    control means for controlling the display on said display means by converting the angular data of said absolute positions and said coordinates into distance data while making corrections according to said current position, and by calculating an element between said nodes thereby to calculate whether or not said current position is on said scheduled route, in dependence upon whether or not the distance between said element and said current position is within a predetermined range.

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