| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a map update data supply device capable of safeguarding a road network and also reducing the volume of data supplied as the newest map update data. <P>SOLUTION: The map update data supply device 1 for supplying an integrated data file to a navigation device 2 includes: a request update data extraction means 10 for extracting, based on an update request, a request update section 23 and an update data file Ma for difference update up to the latest version; a safeguard update data extraction means 11 for extracting a safeguard update section 24 which safeguards a network between adjacent sections, and an update data file Ma up to an update safeguard version; and an integrated data generation means 12 for generating an integrated data file by integrating the extracted update data files Ma into one difference update file. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
