1. A map data utilization apparatus comprising: a storage that stores map data to be utilized in a process that is executed in the map data utilization apparatus, wherein the map data is capable of being updated by an area of a predetermined range in a map; a communication unit that communicates with an external information center; a list acquisition unit that acquires a version list of the map data for updating respective areas in the map; a map data acquisition unit that acquires map data from the external information center by the communication unit, wherein the map data acquisition unit compares a version of the map data of a specific area with a version of the map data in the version list for map data updating so as to acquire the map data of the specific area when the version of the map data of the specific area is different from the version of the map data of a same area in the version list for map data updating; and a map data update unit that updates the map data of the specific area stored in the storage based on map data that is acquired by the map data acquisition unit for map data updating, wherein, the map data acquisition unit is configured, after the comparison is performed by the map data acquisition unit, when the version of the map data of the specific area is determined to be different from the version of the map data of the same area in the version list for map data updating, before acquiring the map data of the specific area from the external information center, to interact with a user to request a user authorization of downloading to update the map data of the specific area, and the data acquisition unit further is configured, when the user authorizes downloading to update of the map data of the specific area in response to the map data acquisition unit requesting the user authorization of said downloading, to acquire the map data for map data updating of the specific area from the information center through the communication unit, the map data acquisition unit allows the user to select one of an automatic update mode for automatically updating the map data through acquiring the map data and an inquiry update mode for updating the map data after making an inquiry about map data updating to the user.