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Method of inputting starting and destination points into navigation systems

  • US 5,107,433 A
  • Filed: 06/18/1990
  • Issued: 04/21/1992
  • Est. Priority Date: 12/30/1987
  • Status: Expired due to Term
First Claim
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1. A method of inputting starting and destination points into an electronic navigation system of vehicle comprising the steps of:

  • storing relevant data of street system maps in a data storage, which data contain a street identification character and coordinates of reference points of streets, with as assigned house number;

    entering the street identification character and the house number of one starting and destination points one after the other each time one of said starting and destination points is inputted into the navigation system;

    searching the data storage according to the entered street identification characters;

    comparing each said house number of reference points of a street found in the data storage during the searching with the inputted house number,transferring coordinates of the house number associated with one of said reference points into a storage of the navigation system when the inputted house number agrees with the house number associated with said one of said reference points;

    storing data of the reference points temporarily with house numbers adjacent to the inputted house number when the inputted house number diverges from the house numbers of the reference points present in the data storage; and

    determining coordinates of the inputted one of said starting and destination points by interpolating coordinates of the reference points with the adjacent house numbers and transferring the coordination of the inputted one of said starting points into the storage of the navigation system.

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