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Navigation apparatus and navigation method for movable body

  • US 6,374,181 B1
  • Filed: 11/22/2000
  • Issued: 04/16/2002
  • Est. Priority Date: 11/25/1999
  • Status: Expired due to Fees
First Claim
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1. A navigation apparatus for a movable body which assists in moving with a map while at least displaying the map, comprising:

  • a first information storing medium for storing map data corresponding to the map thereon;

    a detecting device for detecting displayed map data corresponding to the map already displayed at least once from the first information recording medium; and

    a recording device for recording the displayed map data detected by the detecting device on a second storing medium having higher access speed than the first information storing medium.

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