Abstract: A map update controller of a map data management apparatus predicts meshes whose pieces of map data will be requested from a map application, and identifies meshes whose pieces of map data stored in the map database are not latest as update-necessary meshes, from among the predicted meshes whose pieces of map data will be requested. The map update controller performs a first map update process of immediately updating pieces of map data of the update-necessary meshes when the pieces of map data of the update-necessary meshes can be updated before the map application requests the pieces of map data of the update-necessary meshes, and performs a second map update process of updating the pieces of map data of the update-necessary meshes at the timing that an operation of the map application satisfies a predefined condition when the pieces of map data cannot be updated.

Abstract: It is an object of the present disclosure to provide a technique to make it possible to reduce data size of a file used for managing an update of a mesh file. A map data update apparatus updates a specific mesh file on the basis of an update necessity management file having a bit array in which respective positions of a plurality of bits are associated with respective mesh IDs of a plurality of mesh files, in which 1-bit flag information indicating the necessity of an update of the mesh file is stored at the position corresponding to the mesh ID of the mesh file in the bit array and the mesh ID of the specific mesh file.

Abstract: It is an object of the present invention to provide a technique by which a desired search can be performed even without any polygon data. An administrative district area is defined by collecting mesh areas in each of which a POI is located, for each administrative district, among mesh areas obtained by sectioning an area on a map, and an extended administrative district area is defined by extending the administrative district area. Then, the data storage stores therein data in which a name of an administrative district is associated with a POI within the extended administrative district area related to the administrative district, as search data.

Abstract: The present invention has an object to provide a technique capable of reducing the size of update data. A map information processing apparatus includes a data extractor that extracts a difference between a shape of a past road link and a shape of a current road link as update data for updating predetermined map information. The data extractor does not extract the difference as the update data in a case where one road link of the past road link and the current road link is included in a buffer region obtained by extending the shape of the other road link by a predetermined distance.

Abstract: The present invention has an object to provide a technique capable of reducing the size of update data. A map information processing apparatus includes a data extractor that extracts a difference between a shape of a past road link and a shape of a current road link as update data for updating predetermined map information. The data extractor does not extract the difference as the update data in a case where one road link of the past road link and the current road link is included in a buffer region obtained by extending the shape of the other road link by a predetermined distance.

Abstract: It is an object of the present invention to provide a technique by which a desired search can be performed even without any polygon data. An administrative district area is defined by collecting mesh areas in each of which a POI is located, for each administrative district, among mesh areas obtained by sectioning an area on a map, and an extended administrative district area is defined by extending the administrative district area. Then, the data storage stores therein data in which a name of an administrative district is associated with a POI within the extended administrative district area related to the administrative district, as search data.