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Method for organizing map data

  • US 6,751,629 B2
  • Filed: 05/30/2003
  • Issued: 06/15/2004
  • Est. Priority Date: 07/28/2000
  • Status: Expired due to Term
First Claim
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1. A method of organizing map data on a physical storage medium, wherein the map data represent geographic features in a region, the method comprising:

  • separating the map data into a plurality of parcels, wherein each parcel contains a portion of all the map data and wherein each parcel contains a separate plurality of data records; and

    for each parcel, storing the map data for the parcel together on the data storage medium;

    wherein the map data in each parcel represents the geographic features located within a separate, respective one of a plurality of rectangular areas into which the region is divided;

    wherein all the rectangular areas that are adjacent to each other in an east-west direction form a row of rectangular areas that all have northern east-west boundaries at a common latitude and southern east-west boundaries at another common latitude; and

    wherein the rectangular areas within a row have north-south boundaries that are selected so that the data size of a parcel containing the map data that represents the geographic features located within the rectangular area is approximately a predetermined size.

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