Abstract: A drive assist apparatus according to the present disclosure includes: a dynamic information acquisition unit acquiring, as dynamic information, at least one of subject vehicle dynamic information, the other vehicle dynamic information, and obstacle dynamic information from each of a plurality of vehicles; a map data acquisition unit acquiring map data including a shape of a traffic lane; a dynamic information management unit associating the dynamic information and the map data with each other and managing them; an interference prediction unit predicting whether or not the subject vehicle interferes with the other vehicle traveling in front of the subject vehicle along a traffic lane adjacent to a traffic lane along which the subject vehicle travels when the other vehicle avoids the obstacle based on the dynamic information and the map data; and a drive assist information generation unit generating drive assist information based on the predicted result.

Abstract: An object of the present invention is to achieve an efficient route search and a creation of detailed guidance information. A travel assistance device according to the present invention includes: an information acquisition unit acquiring road connection information which expresses a connection relationship of roads in units of roads and does not include shape information of roads, first traffic lane reference information which expresses a connection relationship of roads in units of traffic lanes and includes shape information of traffic lanes, and corresponding information which associates the road connection information with first traffic lane reference information; a route search unit searching a travel route of a vehicle using the road connection information; and a guidance information creation unit creating guidance information for guiding the vehicle using the first traffic lane reference information of the travel route.

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: 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: An object of the present invention is to provide a navigation device and a server device that are able to calculate an optimal route reflecting the user's intention in a case where a new site is added after a route to a destination is set. The navigation device of the present invention includes a route calculation unit.

Abstract: Disclosed is a map information processing device including an update information acquiring unit for acquiring update information for updating map information including regional map files and mesh management information, and a processor for updating each regional map file of the map information by using the update information, in which each regional map file stores mesh information, the mesh management information includes mesh management records, each mesh management record includes file identifying information for identifying a regional map file including a corresponding mesh, version information about the version of the regional map file, and mesh storage location information showing the storage location of the mesh information in the regional map file, and the file identifying information of a mesh management record corresponding to a mesh stored in a plurality of regional map files determines the latest version of a regional map file.