Map information processor

Abstract

A map information processor is provided with a map information storage device for storing map information, the range to be created of which is partitioned and managed by a mesh, the map information including area map files provided correspondingly to arbitrary areas and mesh management information, an update information acquisition device for acquiring update information for updating the map information, and a processor for updating the map information for each of the area map files using the update information, wherein each of the area map files stores mesh information, the mesh management information includes mesh management records, the mesh management records include file identifying information for identifying the area map files including the meshes, version information associated with the area map files, and mesh storage position information indicating the storage positions of the pieces of the mesh information in the area map files, and the file identifying information in the mesh management records corresponding to the meshes stored in a plurality of the area map files identifies the latest version of an area map file.

Description

technical field [0001] The present invention relates to a map information processing device for processing map information, in particular to a technique for updating map information. Background technique [0002] As a map information processing device, for example, Patent Document 1 discloses an in-vehicle navigation device, even if the version of the map data of adjacent administrative divisions is different due to the update of the map data for each administrative division. In some cases, an appropriate route search can also be performed when the origin and / or the destination are located near the borders of administrative divisions. [0003] In this in-vehicle navigation device, the lower layer map is composed of shared grids corresponding to the boundary areas of adjacent administrative divisions and exclusive grids corresponding to areas of other administrative divisions. Stored in HDD (Hard Disk Drive: hard disk drive) in advance, when the control unit updates the lowe...

AI Technical Summary

Problems solved by technology

[0009] In the vehicle-mounted navigation device disclosed in Patent Document 1, map data is stored in a dedicated grid consisting of only one administrative district and a shared grid consisting of a plurality of administrative districts. Therefore, the files to be managed The number increases and the management becomes complicated

In addition, when administrative districts are merged or divided, there is a problem that the scope of providing map information cannot be easily changed and updated due to changes in the structure of the private grid and the shared grid.

[0010] In addition, in the update system disclosed in Patent Document 2, when an arbitrary area is an administrative area such as a prefecture, since areas other than the designated administrative area are not included, although there are areas outside the provision range However, if there is a digitization error in the map information, and the range of the updated map information provided is different due to the merger or division of administrative regions, there may be areas with missing map data after the update.

[0011] In addition, in Patent Document 2, when an arbitrary region is set as a grid or a block unit, if it is divided so as to include administrative regions such as prefectures, there is a problem that the mesh shared by a plurality of administrative regions Cells can only be included in any 1 administrative region

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