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Method and system using positions of cellular phones matched to road network for collecting data

  • US 6,381,533 B1
  • Filed: 08/20/1999
  • Issued: 04/30/2002
  • Est. Priority Date: 10/16/1997
  • Status: Expired due to Term
First Claim
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1. A method of collecting data comprising the steps of:

  • determining positions of a plurality of cellular phones in a geographic area using a cellular phone location determining system, wherein the cellular phone location determining system is located outside the cellular phones;

    matching the positions of said plurality of cellular phones to positions of roads represented by data in a geographic database; and

    using a road category as a factor when matching said positions of said plurality of cellular phones to positions of roads represented by data in said geographic database to determine on which of said roads each of said cellular phones is located.

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