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Landmark-based location of users

  • US 20030176965A1
  • Filed: 03/14/2002
  • Published: 09/18/2003
  • Est. Priority Date: 03/14/2002
  • Status: Active Grant
First Claim
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1. A method for determining a location of a user, the method comprising:

  • receiving a user input comprising a first landmark description of a first landmark visible to the user;

    comparing the first landmark description to a database of known landmarks;

    deriving, from the database of known landmarks, a first candidate landmark for the first landmark as a function of the first landmark description;

    calculating a first visibility region for the first candidate landmark; and

    determining the location of the user as a function of the first visibility region.

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