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Parcelization of geographic data for storage and use in a navigation application

  • US 5,974,419 A
  • Filed: 09/05/1997
  • Issued: 10/26/1999
  • Est. Priority Date: 10/25/1996
  • Status: Expired due to Term
First Claim
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1. A method of storing a plurality of records of geographic data on a storage medium, wherein each record represents a physical feature having a physical location in a geographic region, the method comprising the steps ofseparating said plurality of records into first and second groupings of records wherein the records in said first of said groupings represent physical features having geographic locations encompassed within a first rectangular area and the records in said second of said groupings represent physical features having geographic locations encompassed within a second rectangular area,wherein said first and said second rectangular areas are formed by a division at a position of a rectangular area that encompasses the locations of the physical features represented by the plurality of records in said first and second groupings, wherein said position of said division is determined byranking trial divisions of said rectangular area;

  • andselecting the position of said division by evaluating said ranking of said trial divisions.

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