MAP INFORMATION DISTRIBUTION CENTER AND MAP INFORMATION DISTRIBUTION METHOD

摘要

As for the navigation updating history information in an individual navigation device, sorted by a navigation ID which specifies the navigation device, the version of map information currently stored in the navigation device is stored corresponding to each block ID given to an area of an approximately 2.5 km square sorted in three distribution road categories of high standard which represents high standard roads such as national expressways and city expressways, ordinary which represents ordinary roads such as national roads of three digit numbers or more, principal local roads, prefectural roads and municipal roads, and narrow street which represents narrow streets.