Method and apparatus for providing time-variant geographical information and a user device therefor

  • US 6,532,413 B1
  • Filed: 06/27/2001
  • Issued: 03/11/2003
  • Est. Priority Date: 09/15/1998
  • Status: Expired due to Term
First Claim
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1. A data signal embodied in a carrier wave, said data signal providing traffic state information to a user device, wherein said traffic section map includes at least one section including at least one vector entity, said data signal comprising:

  • a map identifier to be used for selecting a suitable traffic state map which corresponds to the traffic state information; and

    at least one traffic state data in section-wise, wherein said traffic state data is to be used for designating an attribute of said vector entity included in corresponding section of said traffic section map.

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