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Vehicle state mileage determination system

  • US 6,181,995 B1
  • Filed: 09/20/1999
  • Issued: 01/30/2001
  • Est. Priority Date: 12/13/1996
  • Status: Expired due to Term
First Claim
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1. A system for monitoring the travel of a vehicle within a set of predefined geographic entities and determining in which of the entities the vehicle is presently located, wherein the location of the vehicle and the boundaries of the entities can be defined by coordinate data points in a common coordinate system, said system comprising:

  • a vehicle position determination system installed on-board the vehicle for generating a present vehicle location point;

    a memory storing for each of the entities a set of ordered coordinate data points representing the boundary of the entity; and

    a processor coupled with said position determination system and said memory for comparing said present vehicle location point to said boundary coordinate data points of an entity including generating a ray emanating from said location point and determining if said ray crosses the boundary of the entity an even or odd number of times.

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