Navigation system and navigation method

A navigation system for guiding a mobile body using map information, the navigation system comprising:

• an input circuit for accepting input data from a user;
• a storage device for storing a data structure for the map information, the map information including data structures for a plurality of map features, the map features including geographical features, road information, point information and high accuracy maps;
• and for storing navigation application map data requirements for a plurality of different navigation applications corresponding to the map features, wherein different navigation applications include display processing, map-drawing processing, route-search processing, guidance processing, and driving-assistance processing, and
• a microcomputer coupled to the storage device that generates required data for the plurality of different navigation applications corresponding to the stored navigation application map data requirements, based on the stored map features and executes a process for navigating the mobile body using the required data, wherein
• the microcomputer:
• sets, based on a state of the process for navigating the mobile body, analysis priority levels for analysis processing for each of the map features to determine map data requirements for each of the plurality of different navigation applications and sets generation priority levels for each of the plurality of different navigation applications, wherein the analysis priority levels determine a priority for each of the stored map features, and the generation priority levels determine a priority for generating the map data requirements for each of the plurality of different navigation applications,
• executes, for each of map features selected as an analysis target, the analysis processing in an order according to the analysis priority,
• generates the map data requirements for the plurality of different navigation applications in an order according to the generation priority levels, based on results of the analysis processing obtained for the map features that are selected as the analysis target,
• stores the generated map data requirements for the plurality of different navigation applications, in the storage device, and
• executes the process for the navigating the mobile body using the navigation application map data requirements stored in the storage device.