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Position input system for vehicular navigation apparatus

  • US 5,115,399 A
  • Filed: 11/26/1990
  • Issued: 05/19/1992
  • Est. Priority Date: 12/28/1987
  • Status: Expired due to Fees
First Claim
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1. A navigation system for a vehicle having a position input system for assisting vehicle navigation to a desired destination, which comprises:

  • input means for inputting said desired destination and for inputting a present intersection position in terms of characters or code numbers identifying the present intersection;

    memory means for storing information about said desired destination and map information;

    said map information including an intersection list and a road data list;

    said intersection list including information of landmarks located in the vicinity of respective intersections;

    said road data list including starting point intersection information and ending point intersection information;

    display means for displaying guidance information; and

    control means for controlling said display means to display the present intersection, roads in said road data list having starting point information corresponding to said intersection and a landmark in the vicinity of said intersection, wherein said control means includes means for determining a line bisecting an angle between two roads displayed on said display means and intersecting at said intersection, and means for positioning the display of the landmark on the bisecting line a selected distance from said intersection;

    said input means further including means for inputting a present road position by identifying one of said displayed roads relative to said landmark as displayed on said display means.

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