Patent ID: 9074902
Filing Date: 2015-07-07
Classification: G01C,G06F,G09B

Abstract:
1. A navigation apparatus, characterized by comprising: a map information storing unit that stores pieces of map information about a plurality of map coverage areas respectively in any of a plurality of storage areas including a first storage area and a second storage area, and that stores management information of the map coverage areas related to the pieces of map information stored in the storage areas; a map coverage area detecting unit that detects a map coverage area containing a piece of such map information currently in use out of the plurality of map coverage areas; a storage area selecting unit that selects the first storage area having stored a piece of map information of a map coverage area geographically distinct from the map coverage area detected by the map coverage area detecting unit, based on the management information; an update map information acquiring unit that acquires pieces of update map information of the map coverage areas from a recording medium having recorded thereon the pieces of update map information; and an update control unit that exerts control so as to initialize the first storage area, thereafter to acquire a piece of such update map information of the map coverage area detected by the map coverage area detecting unit through the update map information acquiring unit and to store the piece of update map information in the first storage area, and thereafter to update the management information, thereafter further to initialize the second storage area having stored therein a piece of map information of a map coverage area identical with the piece of the map information of the map coverage area stored in the first storage area, thereafter to acquire a piece of such update map information of a map coverage area other than the piece of update map information stored in the first storage area through the update map information acquiring unit and to store the piece of update map information in the second storage area, and thereafter to update the management information.