MAP UPDATE DISTRIBUTION AND NOTIFICATION SYSTEM

摘要

A CPU of a map information distribution center extracts notification information from an updated content database that communicates respective updated content pertaining to roads and objects for each section of extracted difference data. The CPU creates a road notification information table and an object notification information table and scores the respective notification information in the road notification information table and the object notification information table. The CPU also calculates total score numbers of the respective notification information in the road notification information table and the object notification information table to determine an order of priority, and creates a prioritized notification information table. The CPU then sends the extracted difference data and the prioritized notification information table to a navigation device.