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MAP UPDATE DATA SUPPLY DEVICE AND MAP UPDATE DATA SUPPLY PROGRAM

  • US 20130006925A1
  • Filed: 03/07/2011
  • Published: 01/03/2013
  • Est. Priority Date: 03/23/2010
  • Status: Active Grant
First Claim
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1. A map update data supply device that supplies data for updating a map database to a navigation device that has the map database, with the map database including at least road network information and divided into a plurality of sections, the map update data supply device comprising:

  • an update map database that manages per section versions of an update data file of the map database, and stores per section an overwrite update data file that is an update data file for overwrite updating to a latest version, has the same format as the map database has, and includes all data constituting a map within a section as the map database includes, and a difference update data file that is an update data file for difference updating to a particular version;

    a request update data extraction unit that, based on an update request from the navigation device, extracts a request update section that is a section subjected to an overwrite update, and extracts for each request update section the overwrite update data file as a first supply data file that is a data file to be supplied to the navigation device;

    a safeguard update data extraction unit that, if all the request update sections are updated by the overwrite update data file, extracts a safeguard update section that is a section requiring a difference update to safeguard a road network connection between adjacent sections, and extracts for each safeguard update section the difference update data file up to an update safeguard version, which is a version requiring a difference update to safeguard the road network connection, as a second supply data file that is a data file to be supplied to the navigation device; and

    a data supply unit that supplies to the navigation device the first supply data file for each request update section extracted by the request update data extraction unit, and the second supply data file for each safeguard update section extracted by the safeguard update data extraction unit.

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