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METHOD AND MACHINE FOR GENERATING MAP DATA AND A METHOD AND NAVIGATION DEVICE FOR DETERMING A ROUTE USING MAP DATA

  • US 20100299055A1
  • Filed: 10/22/2008
  • Published: 11/25/2010
  • Est. Priority Date: 10/26/2007
  • Status: Active Grant
First Claim
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1. A method of processing speed data to generate map data which comprises a plurality of navigable segments representing segments of a navigable route in an area covered by the map, the method comprising:

  • i. obtaining the speed data for at least one segment, the speed data comprising measured speeds of travel through the segment at different times;

    ii. generating from the speed data for the at least one segment, data on at least one normal speed profile comprising an average speed of travel through the segment for a time recurring weekly;

    iii. for at least one specified time, generating for the at least one segment data on at least one abnormal speed profile comprising an expected speed of travel through the segment during the specified time, the specified time being a time that does not occur weekly; and

    iv. assigning to the at least one segment of the map data the corresponding normal speed profile and the abnormal speed profile for use by a navigation device in routing algorithms to determine a journey across the area.

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