×

Geographic locator of a vehicle using GPS and angles between pairs of adjacent boundary coordinate points

  • US 5,550,743 A
  • Filed: 02/15/1995
  • Issued: 08/27/1996
  • Est. Priority Date: 02/15/1995
  • Status: Expired due to Fees
First Claim
Patent Images

1. A system for determining which of a plurality of geographic entities a vehicle is in, wherein each of said entities is defined by a closed path boundary represented by a set of ordered discrete coordinate points, said system comprising:

  • a position determining system for generating present vehicle position information including a coordinate data point for said vehicle;

    receiver means installed on said vehicle for receiving said present vehicle position information;

    a memory device containing information including said ordered coordinate points for each of said plurality of entities; and

    processor means for selecting a set of entities from said plurality of entities and for each entity in said set, adding the angles formed between lines extending from said vehicle position coordinate data point to each adjacent pair of discrete coordinate points representing said closed path boundary to obtain a summation and for identifying the entity for which said summation yields a non-zero result.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×