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System and method for transferring navigation information using different coordinate systems

  • US 20050137798A1
  • Filed: 05/19/2004
  • Published: 06/23/2005
  • Est. Priority Date: 12/23/2003
  • Status: Active Grant
First Claim
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10. A method for preparing navigation information comprising the steps of:

  • receiving a request for navigation information;

    determining an overall route and constructing an overall map;

    selecting a first portion of the overall map; and

    determining whether the first portion is more efficiently encoded using relative or absolute coordinates.

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