Information updating device, information distributing device, information processing system, method thereof, program thereof, and storage medium storing the program

摘要

A terminal unit (400) of a navigation system (100) transmits to a server (300) list request information containing a rectangular code corresponding to a predetermined display rectangular area of a travel route map. The terminal unit (400) acquires from the server (300) a server POI list corresponding to the rectangular code of the list request information, and when recognizing that the server POI list contains POI individual information corresponding to terminal base data that is not stored in a terminal base storage area, the terminal unit (400) transmits base data request information about POIID of the POI individual information to the server (300). Upon acquisition of server base data corresponding to the base data request information from the server (300), the terminal unit (400) stores the server base data in the terminal base storage area as terminal base data.

主权项

1. An information updating device for acquiring POI information about a POI from an information distribution device via a network to store the POI information in an update information storage section, the information updating device comprising:
a unique information acquirer for, upon recognition of acquisition request information for acquiring POI information of a POI located in a predetermined area on a map, outputting a distribution request information for requesting distribution of the POI information to the information distributing device and acquiring unique information of the POI information from the information distributing device in response to the distribution request information, the POI information including POI guidance information about a guidance of the POI and unique information that associates the POI guidance information with the POI and identifies not the POI but the POI information; a selecting section for comparing the unique information acquired by the unique information acquirer and the unique information in the update information storage section to select unique information that is not stored in the update information storage section from the acquired unique information, the selecting section outputting the selected unique information to the information distributing device; and an information updating section for acquiring POI information having the unique information selected by the selecting section from the information distributing device to store the POI information in the update information storage section to update the POI information relating to POI in the predetermined area without updating a display data for displaying the map.