| 摘要 |
PROBLEM TO BE SOLVED: To provide "a map data preparation method and a map data preparation device" capable of reducing the size of differential data to shorten the map update time. SOLUTION: In a pseudo new map data preparation method for preparing differential data to be used in updating old map data into the new map data, an addition file is prepared by selecting necessary addition parts from the new map data, and the pseudo new map data to be used for preparing differential data by incorporating the addition file into the old map data are prepared. When preparing the addition file, a new map is drawn using the new map data; a replacement range is designated in the drawn new map; the part of the map data within the replacement range is prepared as the addition file; the part of the map data within the replacement range is deleted from the old map data, and the addition file is incorporated into the old map data after the deletion to prepare the pseudo new map data. COPYRIGHT: (C)2007,JPO&INPIT |
